JP7428403B2 - Energy absorbing devices and structures - Google Patents

Description

The present invention relates to an energy absorbing device and a structure, and particularly to an energy absorbing device and a structure that can be easily designed.

There is a structure equipped with an energy absorption device to improve earthquake resistance (Patent Document 1). According to the energy absorbing device disclosed in Patent Document 1, by arranging and connecting a small steel pipe inside a large steel pipe, the actual member length of the energy absorbing device can be made longer than the apparent member length. Therefore, the amount of elastic deformation of the energy absorbing device can be ensured. In addition, with respect to the steel pipes disposed on the outside and the steel pipes disposed on the inside, the deformation of the compressively deformed steel pipe can be controlled by the tensile deformed steel pipe, and buckling of the compressively deformed steel pipe can be suppressed.

JP 2008-285899 (Paragraphs 0015 to 0027 and Figures 1 and 7, etc.)

However, the conventional energy absorbing device described above has a problem in that it takes time and effort to design.

That is, in the conventional energy absorbing device described above, a steel pipe is used in the portion that deforms when an axial force is applied. Since steel pipes are ready-made products, the plate thickness and outer diameter are specified, and when the plate thickness is changed, the outer diameter is also changed. Therefore, there are no off-the-shelf steel pipes with appropriate plate thicknesses and outer diameters, and it takes time and effort to design energy absorbing devices.

In addition, if you try to create a steel pipe with a new thickness and outer diameter (other than ready-made products), you will need a mold and equipment to create that steel pipe each time you create a new steel pipe. , not realistic.

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide an energy absorbing device and a structure that can be easily designed.

To achieve this object, the energy absorbing device of the present invention comprises a base member formed from a plurality of plates or a single plate, the longitudinal end of which is connected to one of the two points of the structure; a plurality of plate-shaped intermediate members disposed in the same number on both sides of the base material in the thickness direction; a restraining member directly or indirectly connected to the other of the two points, the intermediate member is disposed with the plate thickness direction facing the thickness direction of the base material, and the intermediate member is disposed with the thickness direction of the base material The intermediate material adjacent to the base material in the thickness direction is disposed with the entire surface of the base material side in contact with the base material, and the intermediate material is adjacent to the restraining material in the thickness direction of the base material. The matching intermediate material is disposed with the entire region of the surface on the restraining material side in contact with the restraining material, and a plurality of intermediate materials are disposed on one side of the base material in the thickness direction. The intermediate materials that are adjacent to each other in the thickness direction of the base material are arranged in such a manner that the entire opposing regions of their opposing sides are in contact with each other, and the base material, the intermediate material, and the restraint are in contact with each other. The materials are connected in a bellows shape.
Alternatively, the energy absorbing device of the present invention includes a base material formed from a plurality of plates or a single plate, the longitudinal end of which is connected to one of two points of the structure; a plurality of plate-shaped intermediate members arranged in the same number on both sides of the structure; a restraining material directly or indirectly connected to the other, the base material, the intermediate material, and the restraining material are connected in a bellows shape, and the base material, the intermediate material, and the restraining material are A region other than the folded portion that is connected in a bellows shape and folded back is disposed with a predetermined gap from the base material, the intermediate material, or the restraint material that is adjacent to each other in the thickness direction of the base material.

According to the energy absorbing device according to claim 1, the base material is formed from a plurality of plates or one plate and whose longitudinal end portion is connected to one of two points of the structure; A plurality of plate-shaped intermediate members are arranged in the same number on both sides of the structure, and a plurality of plate-shaped intermediate members are arranged in the same number on both sides of the structure. and a restraining material that is connected directly or indirectly, and the base material, intermediate material, and restraining material are connected in a bellows shape, so that when an axial force acts on the energy absorption device, the force is transmitted. The intermediate material to be used can be formed from a plate. Here, among general steel materials, ready-made iron plates have more options for plate thickness than ready-made steel pipes, and a wider selection range of plate thicknesses is also available. In the energy absorbing device according to the first aspect, since the intermediate material is formed from a plate, the thickness of the intermediate material can be easily changed to a required thickness. As a result, the design of the energy absorbing device can be simplified.

In addition, the intermediate material is arranged with its plate thickness direction facing the thickness direction of the base material, and the intermediate material adjacent to the base material in the thickness direction of the base material has the entire area of the surface on the base material side facing the base material. An intermediate material that is placed in contact with the restraining material and adjacent to the restraining material in the thickness direction of the base material is placed with the entire surface of the restraining material side in contact with the restraining material, and When a plurality of intermediate materials are arranged on one side of the base material, the intermediate materials that are adjacent to each other in the thickness direction of the base material are arranged so that the entire opposing areas of their opposing surfaces are in contact with each other. Therefore, collision noise is generated when the deformation of the side that is compressively deformed by the base material, the intermediate material, and the restraint material at adjacent positions in the thickness direction of the base material is regulated by the side that is deformed in tension. can be suppressed.

In addition, the intermediate material is arranged with its plate thickness direction facing the thickness direction of the base material, and the intermediate material adjacent to the base material in the thickness direction of the base material has the entire area of the surface on the base material side facing the base material. An intermediate material that is placed in contact with the restraining material and adjacent to the restraining material in the thickness direction of the base material is placed with the entire surface of the restraining material side in contact with the restraining material, and When a plurality of intermediate materials are arranged on one side of the base material, the intermediate materials that are adjacent to each other in the thickness direction of the base material are arranged so that the entire opposing areas of their opposing surfaces are in contact with each other. Since it is provided , it is possible to suppress buckling when the base material, intermediate material, or restraining material is compressively deformed.

Further, the intermediate material is arranged with its plate thickness direction facing the thickness direction of the base material, and the intermediate material adjacent to the base material in the thickness direction of the base material has the entire area of the surface on the base material side facing the base material. An intermediate material that is placed in contact with the restraining material and adjacent to the restraining material in the thickness direction of the base material is placed with the entire surface of the restraining material side in contact with the restraining material, and When a plurality of intermediate materials are arranged on one side of the base material, the intermediate materials that are adjacent to each other in the thickness direction of the base material are arranged so that the entire opposing areas of their opposing surfaces are in contact with each other. Therefore , the distance between the base material, the intermediate material, and the restraint material in the thickness direction of the base material can be minimized. Therefore, when an axial force is applied to the energy absorbing device, the bending moment generated around each folded portion of the base material, intermediate material, and restraining material folded back in a bellows shape can be reduced. As a result, in addition to the restraining material, a reinforcing material for suppressing the bending of each folded portion is unnecessary, or the reinforcing material can be made smaller.
According to the energy absorbing device according to claim 2, the base material is formed from a plurality of plates or a single plate and has a longitudinal end connected to one of two points of the structure; A plurality of plate-shaped intermediate members are arranged in the same number on both sides of the structure, and a plurality of plate-shaped intermediate members are arranged in the same number on both sides of the structure. or a restraining material that is indirectly connected, and the base material, intermediate material, and restraining material are connected in a bellows shape, so that when an axial force acts on the energy absorption device, the force is transmitted. Intermediate materials can be formed from plates. Here, among general steel materials, ready-made iron plates have more options for plate thickness than ready-made steel pipes, and a wider selection range of plate thicknesses is also available. In the energy absorbing device according to the second aspect, since the intermediate material is formed from a plate, the thickness of the intermediate material can be easily changed to a required thickness. As a result, the design of the energy absorbing device can be simplified.
In addition, the base material, intermediate material, and restraint material are connected in a bellows-like manner, and a region other than the folded part that is folded back has a predetermined gap with the adjacent base material, intermediate material, or restraint material in the thickness direction of the base material. Since they are spaced apart, when an axial force acts on the energy absorbing device, the intermediate material can be deformed by the space of the predetermined gap to absorb the axial force acting on the energy absorbing device.
In addition, in this case, since the folded parts of the base material, intermediate material, or restraining material that are adjacent in the thickness direction of the base material are in contact with each other, the members connected at those folded parts are connected in the thickness direction of the restraining material. Minimize the distance away. Therefore, when an axial force is applied to the energy absorbing device, the bending moment generated around each folded portion of the base material, intermediate material, and restraining material folded back in a bellows shape can be reduced. As a result, in addition to the restraining material, a reinforcing material for suppressing the bending of each folded portion is unnecessary, or the reinforcing material can be made smaller.

According to the energy absorbing device according to claim 3, in addition to the effects achieved by the energy absorbing device according to claim 1 or 2, the base material and the intermediate material are each in contact with the restraining material in the width direction. Since it is arranged, it is possible to prevent the base material and the intermediate material from being misaligned in the width direction.

According to the energy absorbing device according to claim 4 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 3 , at least one energy absorbing device is provided on each of both sides in the thickness direction of the base material. The contact member is provided with a contact member that contacts the restraining material when the base material is deformed in the thickness direction, so that the base material is compressed by a predetermined gap formed between the base material and the intermediate material. deformation in the thickness direction can be suppressed. As a result, the force transmitted to each of the intermediate members disposed on both sides of the base material in the thickness direction becomes uneven, and it is possible to suppress a decrease in the energy absorbing power of the energy absorbing device.

According to the energy absorbing device according to claim 5 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 4 , in the longitudinal direction of the base material, the side opposite to the connecting side of the base material and the structure. Since a predetermined space is formed outside the base material and the intermediate material, it is possible to suppress the base material and the intermediate material from colliding with other members when an axial force is applied to the energy absorbing device.

According to the energy absorbing device according to claim 6 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 5 , the base material has a pair of opposing plates disposed on both sides in the thickness direction. , and a connecting member that connects the pair of opposing plates, so the connecting member can change the distance between the pair of opposing plates and change the thickness of the base material, as well as change the width of the pair of opposing plates. You can change the width of the base material by Furthermore, the cross-sectional area of the base material can be changed by changing the thickness of the pair of opposing plates or the cross-sectional shape of the connecting member. Therefore, the thickness and width of the base material can be changed without changing the cross-sectional area of the base material. As a result, the size of the outer shape in the cross section of the energy absorbing device can be easily adjusted.

According to the energy absorbing device according to claim 7 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 6 , the base material, intermediate material, and restraining material are two points of the structure. When force is transmitted to the energy absorbing device from between, the intermediate material is configured to reach its yield point at least before the restraining material, so when an excessive axial force is applied to the energy absorbing device, the restraining material buckling can be suppressed, and the energy of the axial force acting on the energy absorbing device can be absorbed by deformation of the intermediate material. As a result, the vibration damping properties of the structure can be improved.

According to the energy absorbing device according to claim 8 , in addition to the effects achieved by the energy absorbing device according to claim 7 , since the restraint material is formed from a square steel pipe, the restraint material is formed from four plates into a square tube shape. The restraining material can be made at a lower cost than when the restraining material is formed in the same manner.

Furthermore, when force is transmitted to the energy absorbing device between two points in the structure, the structure is such that the intermediate material reaches its yield point at least before the restraining material, so the restraining material plastically deforms and buckles. can be suppressed. As a result, buckling of the energy absorbing device can be suppressed.

According to the energy absorbing device according to claim 9 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 8 , the cross-sectional areas of the respective intermediate materials are set to be substantially the same. , the axial force can be applied equally to each intermediate member. As a result, it is possible to easily calculate the amount of expansion and contraction of the energy absorbing device with respect to the axial force when the number of intermediate members is changed.

According to the energy absorbing device according to claim 10 , in addition to the effects achieved by the energy absorbing device according to any one of claims 1 to 9 , the base material, the two intermediate materials, and the restraining material are Since the cross-sectional areas of the surfaces are set to be substantially the same, the axial force can be applied equally to the base material, the two intermediate materials, and the restraint material. As a result, the amount of expansion and contraction of the energy absorbing device relative to the axial force can be easily calculated.

According to the energy absorbing device according to claim 1 , in addition to the effects achieved by the energy absorbing device according to claim 7 or 8 , the intermediate member has a small cross-sectional area in a part connected in a bellows shape. Since the stress acting on the part of the intermediate material where the cross-sectional area is small is reduced to the stress acting on the part (other than a part) where the cross-sectional area is large. It is easier to raise the price compared to that. Therefore, the timing from when the axial force starts acting on the energy absorbing device until the stress acting on some of the intermediate materials reaches the yield point can be brought forward. Therefore, it is possible to plastically deform some of the intermediate members at an early timing after the axial force starts acting on the energy absorbing device, and to start absorbing the axial force acting on the energy absorbing device. As a result, the vibration damping performance of the energy absorbing device can be improved.

According to the energy absorbing device according to claims 1 to 2 , in addition to the effects achieved by the energy absorbing device according to claims 1 to 1, the plurality of intermediate materials disposed on one side in the thickness direction of the base material include at least one intermediate material. An intermediate material whose plate thickness or width is smaller than other intermediate materials, and where multiple intermediate materials are placed on the other side in the thickness direction of the base material is an intermediate material placed on one side. Since it is formed to a size corresponding to There is no need to change the cross-sectional area of That is, it is possible to eliminate the need for a cutting process for varying the cross-sectional area of the intermediate material formed (cut out) with predetermined plate thickness and width dimensions. Therefore, manufacturing of the energy absorbing device can be simplified.

According to the energy absorbing device according to claims 1 to 3 , in addition to the effects achieved by the energy absorbing device according to claims 1 to 2 , each of the plurality of intermediate materials disposed on one side in the thickness direction of the base material has at least Since the plates are formed with different thickness or width dimensions, if an excessive axial force is applied to the energy absorption device, the cross-sectional area of the cross-sectional area will be larger than the intermediate material that is formed with a small cross-sectional area. A plurality of intermediate materials can be plastically deformed in order over the intermediate material to be formed. Thereby, when an excessive axial force acts on the energy absorbing device, one of the intermediate members can be plastically deformed to create a state in which the axial force acting on the energy absorbing device can be absorbed. As a result, it is possible to suppress a decrease in the energy absorption effect of the energy absorption device.

According to the energy absorption device according to claims 1 to 4 , in addition to the effects achieved by the energy absorption device according to any one of claims 1 to 1 to 3 , the other side member connected to the other of the two points of the structure , and the other side of the restraining material is removably connected to the other side member, so that when the base material or intermediate material disposed on one side of the energy absorbing device is plastically deformed, the energy absorbing device One side can be removed and replaced from the other side member. Therefore, there is no need to replace the entire energy absorbing device, and the work of replacing the energy absorbing device can be simplified.

According to the structure described in claim 1 to 5 , the structure includes the energy absorption device according to any one of claims 1 to 1 to 4 , so that when vibration acts on the structure, the structure does not collapse due to the vibration. can be restrained from doing so.

FIG. 2 is a side view showing how the energy absorbing device according to the first embodiment is incorporated into a structure. (a) is a perspective side view of the energy absorption device showing a part of the restraining material in cross section, and (b) is a side view of the energy absorption device. (a) is a cross-sectional view of the energy absorbing device taken along line IIIa-IIIa in FIG. 2(b), and FIG. 2(b) is a cross-sectional view of the energy absorbing device taken along line IIIb-IIIb in FIG. 2(b). (a) is a perspective side view of an energy absorption device in a second embodiment showing a part of the restraining material in cross section, and (b) is a sectional view of the energy absorption device. It is a perspective side view of the energy absorption device in 3rd Embodiment. 6(a) is a side view of the energy absorbing device, and FIG. 6(b) is a sectional view of the energy absorbing device taken along line VIb-VIb in FIG. 6(a). FIG. 3 is a cross-sectional view of the energy absorbing device taken along line VII-VII in FIG. (a) and (b) are sectional views of an energy absorption device in a fourth embodiment. (a) is a side view of an energy absorption device in a fifth embodiment, and (b) is a side view of the energy absorption device as viewed in the direction of arrow IXb in FIG. 9(a). 9(a) is a cross-sectional view of the energy absorbing device along the line Xa-Xa in FIG. 9(a), and FIG. 9(b) is a cross-sectional view of the energy absorbing device along the line Xb-Xb in FIG. 9(a). (a) is a sectional view of an energy absorption device in a first modification, and (b) is a sectional view of an energy absorption device in a second modification. (a) is a sectional view of an energy absorption device in a third modification, and (b) is a sectional view of an energy absorption device in a fourth modification. (a) is a sectional view of an energy absorption device in a fifth modification, and (b) is a sectional view of an energy absorption device in a sixth modification. It is an exploded perspective side view of the energy absorption device in a 7th modification. (a) is a sectional view of an energy absorption device in an eighth modification, and (b) is a sectional view of the energy absorption device. (a) is a sectional view of an energy absorption device in a ninth modification, and (b) is a sectional view of an energy absorption device in a tenth modification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, with reference to FIG. 1, a manner in which the energy absorbing device 10 according to the first embodiment of the present invention is incorporated into a structure 1 will be described. FIG. 1 is a side view showing how the energy absorbing device 10 according to the first embodiment is incorporated into a structure 1.

As shown in FIG. 1, a structure 1 (a building composed of columns 2 and beams 3) composed of columns 2 and beams 3 has a rectangular space surrounded by a pair of columns 2 and a pair of beams 3. A pair of gusset plates 4 are disposed at opposite corners. The energy absorbing device 10 is installed between the pair of gusset plates 4 (between two points on the structure 1).

When the pillars 2 and beams 3 are displaced due to an earthquake or the like, the force generated by the displacement is applied in the axial direction of the energy absorbing device 10 (the left-right direction (arrow LR direction) in FIG. 2). Thereby, the pillar 2 and the beam 3 can be prevented from being displaced beyond the allowable amount. Therefore, collapse of the structure 1 can be suppressed.

In addition, in the energy absorbing device 10, one end of a first base material 11 and a second base material 21, which will be described later, are each fastened to a pair of gusset plates 4 with bolts (not shown).

Next, the energy absorbing device 10 according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 2(a) is a perspective side view of the energy absorbing device 10 showing a part of the restraining material 13 in cross section, and FIG. 2(b) is a side view of the energy absorbing device 10, and FIG. (a) is a cross-sectional view of the energy absorbing device 10 taken along line IIIa-IIIa in FIG. 2(b), and FIG. 3(b) is a cross-sectional view of the energy absorbing device 10 taken along line IIIb-IIIb in FIG. 2(b). It is a diagram.

Note that in FIGS. 3(a) and 3(b), a first base material 11, a second base material 21, a first intermediate material 12, a second intermediate material 22, and a restraining material 13, which will be described later, are shown. The welding marks where the welding was performed are indicated by the symbol Y.

In addition, in the following explanation, with respect to the energy absorbing device 10 in the state shown in FIG. , the upper side of the page is the upper side (arrow U direction side), the lower side of the page is the lower side (arrow D direction side), the right side of the page is the right side (arrow R direction side), and the left side of the page is the left side ( (arrow L direction side) and will be explained respectively. Note that for the structure 1 (see Fig. 1), energy is generated in a direction perpendicular to the front-rear direction (arrow F-B direction) with respect to a rectangular plane surrounded by a pair of columns 2 and a pair of beams 3. An absorption device 10 is arranged.

As shown in FIGS. 2 and 3, the energy absorption device 10 includes a first base material 11 formed in a rectangular plate shape that is long in the left-right direction (in the direction of the arrow LR); The second base material 21 is arranged at a predetermined distance in the left-right direction and is formed in a rectangular plate shape that is long in the left-right direction. ) A plurality of first intermediate materials 12 (three in the first embodiment) are arranged in an overlapping manner on each of both sides, and a first intermediate material 12 is placed on each of both sides of the second base material 21 in the vertical direction. The same number of second intermediate materials 22 are arranged in an overlapping manner, and the first base material 11, the second base material 21, the first intermediate material 12, and the second intermediate material 22 are surrounded. It is formed mainly of a rectangular tube-shaped restraining member 13 arranged therein.

Note that the first base material 11 and the first intermediate material 12 and the second base material 21 and the second intermediate material 22 are perpendicular to the left-right direction (arrow LR direction), and the energy absorption device It is formed in a shape that is symmetrical in the left and right directions with respect to a plane located approximately in the middle in the left and right direction of 10. Therefore, in the following explanation, the first base material 11 and the first intermediate material 12 disposed on the left side (arrow L direction side) will be mainly explained, and the first base material 11 and first intermediate material 12 disposed on the right side (arrow R direction side) will be mainly explained. A detailed explanation of the second base material 21 and the second intermediate material 22 will be omitted.

The first base material 11 is formed from a steel plate, and has its thickness direction (thickness direction) facing the front-rear direction (arrow FB direction) and its width direction facing the up-down direction (arrow UD direction). It will be arranged in Moreover, the first base material 11 is arranged at a substantially intermediate position of the energy absorbing device 10 in the front-rear direction.

The first base material 11 is configured such that its left side (the side in the direction of arrow L) can be connected to one of the gusset plates 4 of a pair arranged on the structure 1 (see FIG. 1), and the gusset plate 4 and The connecting part of is enlarged in the width direction. Thereby, when the pillar 2 and the beam 3 are displaced due to an earthquake or the like, the force generated by the displacement can be easily transmitted in the axial force direction of the energy absorbing device 10 (arrow LR direction).

The first intermediate material 12 is formed from an iron plate made of the same material as the first base material 11, and has its thickness direction oriented in the front-rear direction (arrow FB direction) and its width direction in the up-down direction (arrow UD direction). direction). Further, the first intermediate material 12 is disposed at a position overlapping the first base material 11 in the front-rear direction in a portion excluding the connection portion with the gusset plate 4.

In the energy absorbing device 10 according to the first embodiment, three first intermediate materials 12 are disposed on each side of the first base material 11 in the thickness direction (thickness direction). In the following description, first intermediate materials 12a to 12c are arranged in order from the first intermediate material 12 disposed on the side closer to the first base material 11 (in the second intermediate material 22, the first intermediate materials 12a to 12c are disposed on the side closer to the second base material 21). The second intermediate material 22 provided will be described with reference numerals 22a to 22c) in order.

The restraint material 13 includes a pair of plate-shaped first restraint materials 13a arranged on both sides in the width direction of the first base material 11 and the first intermediate materials 12a to 12c, and and a pair of plate-shaped second restraint members 13b arranged outside the pair of first intermediate members 12c, and the pair of first restraint members 13a and the pair of second restraint members 13b are arranged at an angle. It is formed by combining them into a cylindrical shape.

The first restraint material 13a and the second restraint material 13b are each formed from an iron plate made of the same material as the first base material 11. Further, the first restraining member 13a is arranged with its thickness direction facing the up-down direction (arrow UD direction) and its width direction facing the front-rear direction (arrow FB direction). On the other hand, the second restraining member 13b is arranged with its thickness direction facing the front-rear direction and its width direction facing the up-down direction.

Further, the second restraint material 13b is formed in such a dimension that both ends in the width direction protrude outward from the pair of first restraint materials 13a, and the first restraint material 13a is It is placed between the opposite sides.

As a result, when the energy absorbing device 10 is installed in the structure 1 (see FIG. 1), the first restraining material is placed in the direction perpendicular to the rectangular plane surrounded by the pair of columns 2 and the pair of beams 3. Protrusion of both widthwise ends of 13a can be suppressed.

Note that the first base material 11, the first intermediate material 12, the first restraint material 13a, and the second restraint material 13b are formed of iron plates made of the same material. For example, it is formed from an iron plate made of SS material, SN material, or low yield point steel material. Note that the first base material 11, the first intermediate material, the first restraint material 13a, and the second restraint material 13b are not limited to SS material, SN material, or low yield point steel material. , or may be formed from other general steel materials (for example, SM material or SUS material).

Next, a method for manufacturing the energy absorbing device 10 will be explained. The method for manufacturing the energy absorbing device 10 includes first welding the first intermediate materials 12a to 12c on both sides of the first base material 11 in the front-rear direction (arrow FB direction), and then welding the first intermediate materials 12a to 12c on both sides of the first base material 11. and the first intermediate materials 12a to 12c are made into an integrated structure.

Note that the first base material 11 and the first intermediate material 12a are welded at the center side in the left-right direction (arrow LR direction) of the energy absorbing device 10 across both ends in the width direction. 12a and the first intermediate material 12b are welded across both widthwise ends of the left side (arrow L direction side) of the energy absorbing device 10, and the first intermediate material 12b and the first intermediate material 12c are The center side in the left-right direction of the energy absorbing device 10 is welded across both ends in the width direction.

Next, the second intermediate materials 22a to 22c are overlapped and welded on both sides of the second base material 21 in the front-rear direction (arrow FB direction), and the second intermediate materials 22a to 22c are welded together. and into an integrated structure. Note that, as described above, the first base material 11 and the first intermediate materials 12a to 12, and the second base material 21 and the second intermediate materials 22a to 22c are formed in left-right symmetrical shapes. Ru. Therefore, by preparing two sets of integrated structures of the first base material 11 and the first intermediate materials 12a to 12c, the structure of the first base material 11 and the first intermediate materials 12a to 12c can be A structure of the second base material 21 and the second intermediate materials 22a to 22c can be formed.

Next, the structure of the first base material 11 and the first intermediate materials 12a to 12c, and the structure of the second base material 21 and the second intermediate materials 22a to 22c are moved in the left-right direction (arrow LR). direction), and a pair of first restraining members 13a and a pair of second restraining members 13b are arranged around them.

Then, by welding the second restraint material 13b, the first intermediate material 12c, and the second intermediate material 22c, and by welding the first restraint material 13a and the second restraint material 13b, energy absorption is achieved. Device 10 can be manufactured.

Note that the first intermediate material 12c and the second restraining material 13b are welded to each other across both widthwise ends of the left side (arrow L direction side) of the energy absorbing device 10. Further, the pair of first restraining members 13a and the pair of second restraining members 13b have contact portions between both widthwise ends of the first restraining members 13a and opposing surfaces of the pair of second restraining members 13b. , are welded from the outside between the opposing sides of the pair of first restraining members 13a across both ends in the left-right direction (arrow LR direction).

The method of manufacturing the energy absorbing device 10 described above is just an example, and the manufacturing method may be different from the above. For example, in the above description, the first intermediate materials 12a to 12c are placed on the first base material 11, and then the first base material 11 and the first intermediate materials 12a to 12c are welded. However, the first base material 11 and the first intermediate materials 12a to 12c may be made into an integral structure by stacking the first intermediate materials 12a to 12c one by one and welding them.

According to the energy absorbing device 10 manufactured as described above, the first base material 11, the first intermediate materials 12a to 12c, and the restraint material 13 (second restraint material 13b) are aligned in the left-right direction (arrow L The first intermediate material 12a to 12c, the restraining member 13, and the second intermediate members 22a to 22c. Therefore, the actual member length from one end to the other end of the energy absorbing device 10 is equal to the length of the first intermediate members 12a to 12c, the restraining material 13, and the second intermediate members 22a to 22c. 10 can be made longer than the apparent length from one end to the other.

Therefore, compared to the case where the energy absorbing device 10 is made of one steel material from one end to the other end, the energy absorbing device 10 is The length that can be elastically deformed can be increased. Therefore, the amount of elastic deformation of the energy absorbing device 10 can be ensured, and the proof strength of the energy absorbing device 10 can be improved.

Further, according to the energy absorbing device 10, the first base material 11 and the restraining material 13 are formed from the same material as the two first intermediate materials 12a to 12c, and have the same cross-sectional area. Therefore, when an axial force acts on the energy absorbing device 10, not only the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c but also the first base material 11 and the restraining material 13 are It can be elastically deformed similarly to the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c. Therefore, the amount of elastic deformation of the energy absorbing device 10 can be ensured, and the proof strength of the energy absorbing device 10 can be improved.

Further, in the energy absorbing device 10, the first base material 11, the second base material 21, the first intermediate materials 12a to 12 and the second intermediate materials 22a to 22c, and the restraint material 13 are arranged in the front-rear direction ( They are arranged adjacent to each other in the direction of arrow FB). Therefore, when welding and joining the first base material 11 and the second base material 21, the first intermediate materials 12a to 12 and the second intermediate materials 22a to 22c, and the restraining material 13, Since welding can be performed without any gaps between the parts, there is no need to weld while measuring the position of each member or to use jigs (spacers, etc.) in between. Therefore, manufacturing of the energy absorbing device 10 can be simplified.

Note that in the energy absorbing device 10, the first base material 11, the first intermediate materials 12a to 12c, and the restraining material 13 (second restraining material 13b) are arranged in the vertical direction (in the direction of the arrow UD). By changing the length of the overlapping region in the left-right direction (arrow LR direction), the proof stress of the energy absorbing device 10 can be adjusted.

Further, the first base material 11, the first intermediate materials 12a to 12c, and the restraint material 13 (second restraint material 13b) reciprocate (fold back) in the left-right direction (arrow LR direction). Since they are connected in a bellows shape, when an axial force is applied to the energy absorbing device 10, compressive force and tensile force can be applied alternately to adjacent members with the folded portion as a boundary. In this case, the first base material 11, the first intermediate materials 12a to 12c, and the restraining material 13 (second restraining material 13b) are placed next to each other (that is, there is no gap between them). Therefore, the first base material 11, the first intermediate materials 12a to 12c, or the restraining material 13 on which the tensile force acts, and the first base material 11, the first intermediate material on which the compressive force acts. Buckling of the intermediate members 12a to 12c or the restraining member 13 can be prevented.

Note that the welding material used when welding the first base material 11, the first intermediate materials 12a to 12c, and the restraint material 13 (the first restraint material 13a and the second restraint material 13b) is The base material 11, the first intermediate materials 12a to 12c, and the restraint material 13 (the first restraint material 13a and the second restraint material 13b) are set to be made of the same metal material as the steel material. Thereby, when an axial force acts on the energy absorbing device 10, it is possible to suppress the expansion and contraction of the welded portion from becoming uneven.

Further, the first intermediate materials 12a to 12c have grooves at the time of welding in the first intermediate materials 12a to 12c, which are arranged on the side away from the first base material 11 in the front-rear direction (arrow FB direction). is formed. Thereby, only one groove can be formed in each of the first intermediate materials 12a to 12c. Therefore, since it is not necessary to form a plurality of grooves, it is possible to easily form grooves in the first intermediate materials 12a to 12c.

Furthermore, the shapes of the first intermediate members 12a to 12c including the grooves can be made the same. Therefore, each of the first intermediate materials 12a to 12c can be used at any position when manufacturing the energy absorbing device 10. As a result, the manufacturing work of the energy absorbing device 10 can be simplified.

Next, the arrangement of the first base material 11, first intermediate materials 12a to 12c, and restraining material 13 in the energy absorbing device 10 will be described in detail with reference to FIG.

As shown in FIG. 3, the first base material 11 and the first intermediate materials 12a to 12c are set to have the same dimensions in the width direction, and both ends of each in the width direction are set to the same size in the width direction. It is arranged in a state in which it is in contact with each of the restraining members 13a. In the first embodiment, the distance between the pair of first restraining members 13a facing each other is larger than the distance between the facing pairs of second restraining members 13b.

As a result, when an axial force acts on the energy absorbing device 10 and the energy absorbing device 10 expands and contracts, the first base material 11 and the first intermediate materials 12a to 12c are connected to the first restraining material 13a. On the other hand, it is possible to prevent the position from shifting in the width direction. That is, the displacement of the first base material 11 and the first intermediate materials 12a to 12c in the width direction can be restrained by the first restraining member 13a.

Here, if the first base material 11 and the first intermediate materials 12a to 12c are misaligned in the width direction, the first base material 11 and the first intermediate materials 12a to 12c are misaligned in the width direction. The base material 11 and the first intermediate materials 12a to 12c are arranged with their longitudinal directions facing different directions. Therefore, it becomes difficult to disperse the axial force to the first base material 11 and the first intermediate materials 12a to 12c. Therefore, the energy absorbing device 10 is likely to buckle.

On the other hand, in the present embodiment, since the displacement in the width direction of the first base material 11 and the first intermediate materials 12a to 12c is restrained by the first restraining material 13a, the first base material 11 and the first intermediate materials 12a to 12c are The axial force can be easily distributed uniformly to the first intermediate members 12a to 12c and the restraining member 13. Therefore, the energy absorbing device 10 can be easily expanded and contracted uniformly. As a result, buckling of the energy absorbing device 10 can be suppressed, and the earthquake resistance of the structure 1 (see FIG. 1) can be improved.

In addition, the first base material 11, the first intermediate materials 12a to 12c, and the second restraint material 13b are members arranged at adjacent positions in the front-rear direction (arrow FB direction). placed in contact with each other.

Here, in the case where the first base material 11, the first intermediate materials 12a to 12c, and the second restraint material 13b are arranged with a gap between them, a joint portion (a bellows-shaped It is necessary to enlarge the folded part) in the front-rear direction (direction of arrow FB).

For example, in the case where the energy absorbing device 10 is formed by arranging and connecting a small steel pipe inside a large steel pipe, the steel pipe is a ready-made product, so the thickness and dimensions of the steel pipe are specified as ready-made products. Therefore, a gap is formed between the steel pipe arranged on the inside and the steel pipe arranged on the outside. Therefore, a separate member is required for joining the joint portions.

In addition, since there is a gap between the steel pipes arranged on the inside and the steel pipes arranged on the outside, axial force acts on the energy absorption device 10, and compressive force and tensile force act on each steel pipe. When doing so, the bending moment acting on the joint increases. Therefore, it is necessary to increase the size of the plates at the joints and reinforce the steel pipes.

Furthermore, since there is a gap between the steel pipes installed on the inside and the steel pipes installed on the outside, when each steel pipe expands and contracts, it collides with the adjacent steel pipe, causing collision noise. Another problem is that the steel pipes being compressed tend to buckle due to the gaps.

In contrast, in the present embodiment, as described above, the first base material 11, the first intermediate materials 12a to 12c, and the second restraint material 13b are Since they are arranged in contact with each other in the direction, the bending moment that acts on each joint (the part folded back in a bellows shape) can be reduced, and there is no need to provide a separate member at the joint (i.e., only the welded material ), making it possible to reduce the size of the joint.

Furthermore, since the bending moment acting on each joint can be reduced, when each joint is pulled by the bending moment and tries to spread in the front-rear direction (arrow FB direction), the second restraining member 13b The second restraining member 13b formed with a thinner plate thickness can suppress the joint portions of the first intermediate members 12a to 12c from expanding in the front-rear direction. That is, the displacement of each joint of the first intermediate members 12a to 12c in the front-rear direction can be restrained by the second restraint member 13b without increasing the rigidity of the second restraint member 13b.

Further, since the first base material 11, the first intermediate materials 12a to 12c, and the second restraining material 13b are arranged in contact with each other in the front-rear direction (arrow FB direction), , collision noise can be suppressed from being generated when an axial force is applied to the energy absorbing device 10.

Further, the first base material 11, the first intermediate materials 12a to 12c, and the second restraining material 13b are arranged in contact with each other in the front-rear direction (direction of arrow FB), and there is a gap Therefore, it is possible to suppress buckling when the first base material 11, the first intermediate materials 12a to 12c, or the second restraint material 13b are compressively deformed.

Next, the first base material 11 and the first Each cross-sectional area of the intermediate materials 12a to 12c and the restraining material 13 will be explained.

The thickness of the first base material 11 is set to twice that of the first intermediate materials 12a to 12c, and the cross-sectional area of the first base material 11 is set to twice that of the first intermediate materials 12a to 12c. set to double. That is, the cross-sectional area of the first base material 11 is set to be approximately the same as the cross-sectional area of the two first intermediate materials 12a to 12c.

Here, as described above, when an axial force acts on the energy absorbing device 10, compressive force and tensile force are alternately applied to the first intermediate materials 12a to 12c with the first base material 11 as the starting point. Ru. That is, a pair of first intermediate materials 12a, a pair of first intermediate materials 12b, and a pair of first intermediate materials 12a and 12b are arranged on both sides of the first base material 11 in the front-rear direction (arrow FB direction). The axial force is dispersed to the intermediate material 12c.

In this case, as described above, the cross-sectional area of the first base material 11 and the cross-sectional area of the two first intermediate materials 12a to 12c are set to be approximately the same, so that the first base material 11 , the axial force can be evenly distributed to each of the pair of first intermediate members 12a, the pair of first intermediate members 12b, and the pair of first intermediate members 12c.

Furthermore, the cross-sectional area of the restraint material 13 is set to be approximately the same as the cross-sectional area of the first base material 11, which is the sum of the pair of first restraint materials 13a and the pair of second restraint materials 13b. As a result, when an axial force acts on the energy absorbing device 10, the restraining material 13, the first base material 11, the pair of first intermediate materials 12a, the pair of first intermediate materials 12b, The axial force can be evenly distributed to the pair of first intermediate members 12c. As a result, in this embodiment, it is possible to easily calculate the amount of expansion and contraction of the energy absorbing device 10 with respect to the axial force.

Furthermore, since the cross-sectional area of each of the first intermediate members 12a to 12c is set to be substantially the same, the axial force can be applied equally to each of the first intermediate members 12a to 12c. Therefore, it is possible to easily calculate the amount of expansion and contraction of the energy absorbing device 10 with respect to the axial force when the number of first intermediate members 12a to 12c is changed.

Note that "substantially the same" cross-sectional areas of the first base material 11, the two (pair of) first intermediate materials 12a to 12c, and the restraining material 13 mean that the first base material 11 and Within a range of ±1% considering the dimensional tolerance when the steel materials that are the base materials of the first intermediate materials 12a to 12c, the first restraint material 13a, and the second restraint material 13b are formed. It is to be made the same. Within this range, the restraining material 13, the first base material 11, the pair of first intermediate materials 12a, the pair of first intermediate materials 12b, and the pair of first intermediate materials 12c. The axial force can be evenly distributed, and the actual amount of expansion and contraction of the energy absorbing device 10 can be kept within the safety factor in the calculated value of the amount of expansion and contraction of the energy absorbing device 10 with respect to the axial force.

Further, the first base material 11 and the second base material 21 are arranged at a predetermined distance apart in the left-right direction. As a result, the right side of the first base material 11 and the first intermediate materials 12a to 12c (in the direction of arrow R) and the left side of the second base material 21 and the second intermediate materials 22a to 22c (in the direction of arrow L) A predetermined space is formed in the space.

Therefore, when an axial force acts on the energy absorbing device 10 and the first base material 11 and the second base material 21 approach each other, the first base material 11 and the second base material 21 collide. can be suppressed. Therefore, it is possible to prevent the axial force of the energy absorbing device 10 from acting concentratedly on one part. As a result, uneven expansion and contraction of the energy absorbing device 10 can be suppressed.

In addition, in this embodiment, as described above, the first base material 11, the first intermediate materials 12a to 12c, and the restraint material 13 (the first restraint material 13a and the second restraint material 13b) are Each energy absorbing device 10 is formed from a plate-like member. Therefore, the plate thickness can be changed more easily than when the energy absorbing device 10 is formed from a steel pipe.

That is, when it comes to iron plates and steel pipes, which are general steel materials, ready-made iron plates have more options for plate thickness than ready-made steel pipes, and a wider selection range of plate thicknesses is also available. Therefore, the options for iron plates are less narrowed than for steel pipes, and the plate thickness can be easily changed. As a result, the design of the energy absorbing device 10 can be simplified.

In addition, for ready-made steel pipes, the plate thickness and outer diameter are specified. Therefore, in an energy absorbing device formed from a steel pipe, when the thickness of the steel pipe is changed in order to obtain the required amount of energy absorption for the expected energy, the outer diameter of the steel pipe is also changed. Therefore, when the plate thickness of the steel pipe is changed, the amount of change in the cross-sectional area of the steel pipe is large, and the degree of change in the yield strength, elastic deformation, etc. of the energy absorbing device 10 becomes large. Therefore, strength calculations during design tend to become complicated.

On the other hand, in the present embodiment, the first base material 11, the first intermediate materials 12a to 12c, and the restraining material 13 are each formed from a plate-like member to form the energy absorbing device 10. Since the cross-sectional area of the cross section can be changed by changing the thickness of each of the first base material 11, the first intermediate materials 12a to 12c, and the restraining material 13, energy absorption when the thickness is changed It is possible to suppress the degree of change in the yield strength, elastic deformation amount, etc. of the device 10 from increasing. Therefore, strength calculations when designing the energy absorbing device 10 can be simplified.

Furthermore, in this embodiment, the restraining material 13 is also formed from four iron plates, so when the thickness of the first intermediate materials 12a to 12c is changed, the thickness and width of the restraining material 13 are changed. , the first intermediate materials 12a to 12c and the restraining material 13 can be easily arranged without any gaps, and the cross-sectional area of the two first intermediate materials 12a to 12c and the cross-sectional area of the restraining material 13 are It is easy to make them the same. As a result, the design of the energy absorbing device 10 can be simplified.

Next, with reference to FIG. 4, an energy absorbing device 210 in a second embodiment will be described. Note that the energy absorption device 10 in the first embodiment and the energy absorption device 210 in the second embodiment basically differ only in the number of first intermediate materials 12 and second intermediate materials 22, so In the following description, the same reference numerals as in the first embodiment will be used.

FIG. 4(a) is a perspective side view of the energy absorbing device 210 in the second embodiment, showing a part of the restraining material 13 in cross section, and FIG. 4(b) is a sectional view of the energy absorbing device 210. This corresponds to the cross section of the energy absorbing device 10 taken along the line IIIb-IIIb in FIG. 2(b).

As shown in FIG. 4, the energy absorbing device 210 in the second embodiment has a first intermediate material 12 and a second intermediate material 22 on both sides of the first base material 11 and the second base material 21, respectively. A first intermediate material 12, a first intermediate material 12, a first base material 11 and a second base material 21, which are arranged one by one and are spaced apart from each other by a predetermined distance in the left-right direction (arrow LR direction). They are connected via the restraint material 13 (second restraint material 13b) and the second intermediate material 22.

As a result, similarly to the energy absorbing device 10 in the first embodiment, the first base material 11, the first intermediate material 12, and the restraint material 13 (second restraint material 13b) are moved in the left-right direction (arrow L- It can be connected in a bellows shape that reciprocates (folds back) in the R direction). Therefore, the actual member length from one end of the energy absorbing device 10 to the other end is the length of the first intermediate material 12, the restraining material 13, and the second intermediate material 22 from one end of the energy absorbing device 210. It can be made longer than the apparent length to the other end. Therefore, the amount of elastic deformation of the energy absorbing device 210 can be ensured. In addition, since they are placed next to each other (that is, there is no gap between them), the compressive force is Buckling of the first base material 11, the first intermediate material 12, or the restraint material 13 on which this occurs can be prevented. As a result, the strength of the energy absorbing device 10 against axial force can be improved, and the earthquake resistance of the structure 1 (see FIG. 1) can be improved.

That is, the number of the first intermediate material 12 and the second intermediate material 22 of the energy absorption device 10, 210 is the same as that of the first base material 11 and the second base material 21, and the number of the first intermediate material 12 and the second intermediate material 22. The intermediate material 22 and the second restraining material 13b can be set to any other number (for example, 5 or 7) as long as it is an odd number that allows the intermediate material 22 and the second restraining material 13b to be connected in a bellows shape. Therefore, the proof stress of the energy absorbing device 10, 210 can be changed by simply changing the number of the first intermediate material 12 and the second intermediate material 22 according to the required amount of proof stress of the energy absorbing device 10, 210.

Furthermore, in the energy absorbing device 210 according to the second embodiment, first restraining members 215 made of iron plates made of SS material or SN material are disposed at both ends of the restraining material 13 in the left-right direction (arrow LR direction). Ru. The first restraining member 215 restrains the restraining material 13 (second restraining material 13b) from bending due to the force transmitted from the first intermediate material 12 to the restraining material 13 when an axial force acts on the energy absorbing device 210. The reinforcing plate 218 is a member made of a steel plate with an outer shape larger than that of the restraining member 13, and the left (arrow L direction side) ends of the restraining member 13 and the reinforcing plate 218 are welded. Note that the first suppressing member 215 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

Further, the first suppressing member 215 has an insertion hole 215a through which the first base material 11 can be inserted, and is disposed with the first base material 11 inserted through the insertion hole 215a. Therefore, when an axial force acts on the energy absorbing device 210, it is possible to suppress the axial force from being directly transmitted from the first base material 11 to the first suppressing member 215.

Reinforcing plates 218 made of iron plates made of SS material or SN material are disposed on both sides of the restraining member 13 in the front-rear direction (direction of arrow FB) on one side (arrow L direction side). The reinforcing plate 218 serves as a restraint member to prevent the restraint member 13 (second restraint member 13b) from bending due to the force transmitted from the first intermediate member 12 to the restraint member 13 when an axial force acts on the energy absorbing device 210. This is a member that reinforces the restraint material 13 (second restraint material 13b) by increasing the cross-sectional area of a part of the cross section of the material 13, and is arranged at a position overlapping with one side of the first intermediate material 12 in the front-rear direction. and welded to the restraining member 13 and the first restraining member 215.

In the energy absorbing device 210 in the second embodiment, the reinforcing plate 218 is formed from the same material as the restraining material 13, and one side of the second restraining material 13b has the same thickness as the first intermediate material 12. The thickness of the reinforcing plate 218 is set to . Thereby, when force is transmitted from the first intermediate material 12 to the second restraint material 13b, bending of the second restraint material 13b can be easily suppressed. Note that the reinforcing plate 218 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material) as long as it can reinforce the restraining material 13.

Next, an energy absorbing device 310 in a third embodiment will be described with reference to FIGS. 5 to 7. In the first embodiment, the first intermediate material 12 and the second intermediate material 22 are connected in a bellows shape on both sides of the energy absorbing device 10 in the left-right direction (arrow LR direction). However, in the energy absorbing device 310 according to the third embodiment, a case will be described in which the first intermediate member 312 is connected in a bellows shape only on one side in the left-right direction (arrow LR direction). Note that the same parts as in each of the embodiments described above are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 5 is a perspective side view of the energy absorbing device 310 in the third embodiment, FIG. 6(a) is a side view of the energy absorbing device 310, and FIG. 6(b) is a side view of the energy absorbing device 310 in the third embodiment. 7 is a cross-sectional view of the energy absorbing device 310 taken along the line VIb-VIb, and FIG. 7 is a cross-sectional view of the energy absorbing device 310 taken along the line VII-VII in FIG. 6(a).

Note that in FIG. 5, a part of the restraint material 313 is shown in a cross-sectional view, and a central portion of the energy absorbing device 310 in the left-right direction (arrow LR direction) is omitted. Further, in FIGS. 6A and 7, only the left side (the side in the direction of arrow L) of the energy absorbing device 310 is illustrated. Further, in FIG. 7, welding marks where a first base material 311, a first intermediate material 312, and a restraining material 313, which will be described later, are welded are indicated by the symbol Y.

As shown in FIGS. 5 to 7, the energy absorbing device 310 in the third embodiment extends along the left-right direction (arrow LR direction) and extends on one side in the left-right direction (arrow L direction side). A plurality of sheets (three sheets in the third embodiment) are arranged in an overlapping manner on each of the first base material 311 and both sides of the first base material 311 in the front-rear direction (arrow FB direction). A first intermediate material 312, a rectangular cylindrical restraining material 313 disposed surrounding the first base material 311 and the first intermediate material 312, and a first intermediate material 313 extending along the left and right direction. A rectangular cylindrical extending member 323 disposed on the other side (arrow R direction side) of the base material 311 and the restraining member 313 and the extending member 323 are arranged between the restraining member 313 and the extending member 323. and a connecting member 330 that connects the two.

Note that a bolt (not shown) for connecting the energy absorbing device 310 to the gusset plate 4 of the structure 1 (see FIG. 1) is provided at one end of the first base material 311 (arrow L direction side). ) are formed through which the holes can be inserted. Further, a bolt (not shown) for connecting the energy absorbing device 310 to the gusset plate 4 of the structure 1 (see FIG. 1) is inserted into the right end (arrow R direction side) of the extension member 323. A cross-shaped plate with a plurality of possible through holes is provided. The energy absorbing device 310 can be fastened to the structure 1 through the through holes in the first base material 311 and the through holes in the extension member 323 .

In addition, two sets of structures constituted by the first base material 311, the first intermediate material 312, the restraining material 313, and the connecting member 330 are formed, and these structures are connected in the axial direction (left and right) of the extending member 323. direction, arrow LR direction) may be arranged symmetrically, one set on each side. In this case, plates for fastening to the structure 1 are not provided (omitted) on the extension member 323, but are provided at both ends in the axial direction (left-right direction, arrow LR direction) of the energy absorption device 310. The first base material 311 is connected to two points of the structure 1 (a pair of gusset plates 4 (see FIG. 1)).

The first base material 311 is formed from a steel material (welded H-shaped steel) obtained by welding three iron plates of SS material or SN material into an H shape. Note that the first base material 311 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material). The first base material 311 is formed into an H shape and includes a pair of first iron plates 311a disposed at opposing positions, and a pair of first iron plates 311a disposed between the pair of first iron plates 311a. A second iron plate 311b that connects the first iron plate 311a is provided.

Further, the first base material 311 is disposed with the opposing thickness directions of the pair of first iron plates 311a facing in the front-rear direction (arrow FB direction), and the pair of first iron plates 311a It is arranged with its width direction facing up and down (in the direction of arrow UD). Note that the first base material 311 is disposed at a substantially intermediate position of the energy absorbing device 310 in the front-rear direction. Further, in FIGS. 5 to 7, the first base material 311 (a pair of first iron plate 311a and second iron plate 311b) is illustrated as an integral member for easy understanding.

Suppression plates 317 are disposed on the first base material 311 at both ends of the first iron plate 311a in the width direction (arrow UD direction) so as to connect the opposing sides of the pair of first iron plates 311a. Ru. Furthermore, a plurality of ribs 316 are arranged on the first base material 311 in a space formed by a pair of first iron plates 311a, a second iron plate 311b, and a restraining plate 317.

The restraining plate 317 is a member that restrains the pair of first iron plates 311a from bending inwardly between the opposing sides. -D direction), and both ends in the width direction (arrow FB direction) are joined to a pair of first iron plates 311a by welding.

Further, in the left-right direction (arrow LR direction), the suppression plate 317 is disposed at a position where the right end (arrow R direction side) is the same as the right end of the first iron plate 311a, and the left The end portion (on the arrow L direction side) is set to have a length that exceeds a first suppressing member 315 to the left, which will be described later. As a result, when the pair of first iron plates 311a receives an external force from the members (first intermediate member 312a, first suppressing member 315) disposed on the outside between the pair of first iron plates 311a, , it is possible to suppress the pair of first iron plates 311a from bending inward between the opposing sides.

Note that the left end (in the direction of arrow L) of the suppression plate 317 may extend to the same position as the left end of the first iron plate 311a, or may extend from the left end of the first iron plate 311a. It may also be extended to the front (right side) position. Moreover, the suppression plate 317 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

Like the restraining plate 317, the rib 316 is a member that restrains the pair of first iron plates 311a from bending inward between the opposing sides, and is formed from an iron plate made of SS material or SN material, and is It is disposed in such a manner that it faces in the left-right direction (in the direction of arrows LR), and is joined to the first base material 311 by welding.

In addition, the ribs 316 correspond to positions corresponding to both ends of a first intermediate material 312a, which will be described later, in the left-right direction (direction of arrows LR), and to a center position of the first intermediate material 312a (in the front-rear direction). (see FIG. 7). As a result, when the pair of first iron plates 311a receives an external force from the member (first intermediate material 312a) disposed on the outside between the pair of first iron plates 311a, the pair of first iron plates 311a It is possible to suppress the iron plate 311a from bending inward between the opposing sides.

Note that the ribs 316 correspond to positions corresponding to both ends of a first intermediate material 312a, which will be described later, in the left-right direction (direction of arrows LR), and to a center position of the first intermediate material 312a (in the front-rear direction). In addition to the position (overlapping in the direction of arrow FB), it may also be additionally provided between the three ribs 316 or at a position corresponding to the first suppressing member 315. Further, the ribs 316 and the suppressing plate 317 are not limited to SS material or SN material, but may be formed from other general steel materials (for example, SM material or SUS material).

The first intermediate material 312 is formed from an iron plate made of low yield point steel, and has its thickness direction oriented in the front-rear direction (arrow FB direction) and its width direction oriented in the up-down direction (arrow UD direction). It will be arranged in Further, the first intermediate member 312 is disposed at a position overlapping the first base member 311 in the front-rear direction (arrow FB direction) in a portion excluding the connecting portion with the gusset plate 4. Note that the first intermediate material 312 is not limited to a low yield point steel material, but may be any other general material as long as it is made of a material with a lower yield point than the first base material 311 and the restraining material 313. It is also possible to form it from steel.

Furthermore, in the energy absorbing device 310 according to the third embodiment, three first intermediate materials 312 are arranged on each side of the first base material 311 in the front-rear direction (arrow FB direction). In the following description, reference numerals 312a to 312c will be given sequentially from the first intermediate material 312 disposed on the side closer to the first base material 311.

The first intermediate material 312a is placed a predetermined distance from the right (arrow R direction) end of the first base material 311 to the left (arrow L direction), and the right end is the first intermediate material 312a. It is connected to the base material 311 by welding (welding mark Y). In this case, the welding (welding mark Y) connecting the first intermediate material 312a and the first base material 311 is from the right end of the first intermediate material 312a to the right end of the first intermediate material 311. It is welded over.

The first intermediate material 312b is placed a predetermined distance from the left (arrow L direction) end of the first intermediate material 312a to the right (arrow R direction), and the left end is the first intermediate material 312b. It is connected to the intermediate member 312a by welding (welding mark Y). In this case, the welding (welding mark Y) connecting the first intermediate material 312b and the first intermediate material 312a is from the left end of the first intermediate material 312b to the left end of the first intermediate material 312a. It is welded over.

The first intermediate material 312c is placed a predetermined distance from the right (arrow R direction) end of the first intermediate material 312b to the left (arrow L direction), and the right end is the first intermediate material 312c. It is connected to the intermediate member 312b by welding (welding mark Y). In this case, the welding (welding mark Y) connecting the first intermediate material 312c and the first intermediate material 312b is from the right end of the first intermediate material 312c to the right end of the first intermediate material 312b. It is welded over.

In addition, the first intermediate member 312c is set to have a length such that the left end (in the direction of arrow L) is approximately the same length as the left end of the restraining material 13, which will be described later, and the left end is welded to the restraining material 313 ( They are connected by welding marks Y). Note that the first intermediate material 312c and the restraining material 313 have a groove formed at their left end, and the first restraining member is disposed at the left end of the first intermediate material 312c and the restraining material 313. It is connected with 315 by welding (welding mark Y). That is, the first intermediate member 312c, the restraining member 313, and the first suppressing member 315 are connected by the same welding (welding mark Y).

Through these connections, the first base material 311, the first intermediate materials 312a to 312c, and the restraint material 313 are connected in a bellows shape. Note that the welding distance in the left-right direction (arrow LR direction) of the welding (welding trace Y) connecting each of the first base material 311 and the first intermediate materials 312a to 312c is the welding distance in the left-right direction (arrow LR direction). It is set to be twice or more the plate thickness dimension in the front-rear direction (arrow FB direction) of the materials 312a to 312c, and in the third embodiment, it is set to three times the plate thickness dimension.

The restraining material 313 is formed from a square tube-shaped steel material (welded four-sided box) made by welding four iron plates of SS material or SN material, and is formed from a steel material (welded four-sided box) in the width direction of the first intermediate materials 312a to 312c (arrows U-D A pair of first restraining members 313a are arranged on both sides in the front-rear direction (arrow FB direction), and a pair of second restraining members 313b are arranged outside the pair of first intermediate members 312c in the front-rear direction (arrow FB direction). Equipped with. Note that in FIGS. 5 to 7, the restraint members 313 (a pair of first restraint members 313a and a pair of second restraint members 313b) are illustrated as an integral member for ease of understanding.

A second restraining member 314 is disposed around the restraining member 313, which is formed from an iron plate made of SS material or SN material, and surrounds the pair of first restraining members 313a and the pair of second restraining members 313b. The second restraining member 314 is a member that restrains the pair of second restraining members 313b from bending in the front-rear direction (arrow FB direction), and is a member that restrains the pair of second restraining members 313b from bending in the front-rear direction (direction of arrow FB). (the joint between the first intermediate material 312b and the first intermediate material 312c) and the joint between the first intermediate material 312a and the first intermediate material 312b in the front-rear direction (arrow F- B direction). The second restraining member 314 may be formed by joining a plurality of iron plates by welding, or may be formed by cutting (cutting) a space in which the restraining member 313 is inserted inside one iron plate. It's okay.

Further, the restraining material 313 is set longer than the first intermediate materials 312a and 312b in the left-right direction (arrow LR direction). That is, the left end of the restraint material 313 is arranged at a position a predetermined distance to the left from the left (arrow L direction side) end of the first intermediate materials 312a, 312b, and The right end portion is located a predetermined distance to the right from the right end (on the side in the direction of arrow R) of 312b. As a result, a predetermined space K1 (see FIG. 7) is formed inside the left end of the restraint material 313, and a predetermined space K2 (see FIG. 7) is formed inside the right end of the restraint material 313.

The left side (arrow L direction side) ends of the first intermediate members 312a, 312b are arranged at a predetermined distance in the left-right direction (arrow LR direction) from a first suppressing member 315, which will be described later, by a space K1. , the right side (arrow R direction side) ends of the first base material 311 and the first intermediate materials 312a to 312c are arranged at a predetermined distance in the left-right direction from a connecting member 330, which will be described later, by a space K2. .

At both ends of the restraining member 313 in the left-right direction (arrow LR direction), a first restraining member 315 formed from an iron plate of SS material or SN material is disposed at the left end (arrow L direction side), A connecting member 330 is provided at the right end (the side in the direction of arrow R). Note that the first suppressing member 315 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

The first restraining member 315 is a member for restraining the second restraining member 313b from bending, and is formed from an iron plate having an outer shape larger than that of the restraining member 313. The left side (arrow L direction side) end of the intermediate member 312c is welded.

Further, the first suppressing member 315 has an insertion hole 315a inside thereof through which the first base material 311 can be inserted, and is disposed with the first base material 311 inserted through the insertion hole 315a. Therefore, when an axial force acts on the energy absorbing device 310, it is possible to suppress the axial force from being directly transmitted from the first base material 311 to the first suppressing member 315.

The extending member 323 is formed from a ready-made square steel pipe, and is disposed on the right side (in the direction of the arrow R) of the energy absorbing device 310 in the left-right direction (in the direction of the arrow LR). Note that the extension member 323 is set to be a square steel pipe whose cross section has approximately the same external shape as the restraining member 313 . Thereby, when an axial force acts on the energy absorbing device 310, it is possible to suppress the connecting member 330 sandwiched between the restraining member 313 and the extension member 323 from bending. Further, the extending member 323 does not include the first base material 311 and the first intermediate material 312 inside, and is hollow inside.

The connecting member 330 is a member that connects the restraining member 313 formed from a welded four-sided box and the extending member 323 formed from a ready-made square steel material by welding, and connects the restraining member 313 and the extending member 323 It is formed from steel plates of possible SS or SN materials. Note that the connecting member 330 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

The restraint member 313 is formed from a welded four-sided box, and the extension member 323 is formed from a ready-made square steel material, so even though the plate thickness and corner shape are different, the restraint member 313 and the extension member 323 are connected. Since they are welded and joined via the member 330, the welding area and welding width between the restraining member 313 and the extension member 323 can be secured. As a result, welding workability of the energy absorbing device 310 can be improved.

Next, a method for manufacturing the energy absorbing device 310 will be described. The method for manufacturing the energy absorbing device 310 is as follows: First, first intermediate materials 312a to 312c are stacked and welded on both sides of the first base material 311 in the front-rear direction (arrow FB direction), and and the first intermediate members 312a to 312c are made into an integrated structure.

Note that the first base material 311 and the first intermediate material 312a are such that the right side (arrow R direction side) in the left-right direction (arrow LR direction) of the energy absorption device 310 is in the width direction (arrow FB direction). The first intermediate material 312a and the first intermediate material 312b are welded across both widthwise ends of the energy absorbing device 310 (the side in the direction of arrow L), and the first intermediate material 312a and the first intermediate material 312b are The intermediate material 312b and the first intermediate material 312c are welded together at the right side in the left-right direction of the energy absorbing device 310 across both ends in the width direction.

Next, the structure of the first base material 311 and the first intermediate materials 312a to 312c is inserted inside the restraining material 313, and the first intermediate material 312c is placed on the opposing surfaces of the pair of second restraining materials 313b. The left end (in the direction of arrow L) is welded. Note that in this case, the first restraining member 315 is welded to the left end portion of the restraining member 313 and the first intermediate member 312c. As a result, the first base material 311, first intermediate materials 312a to 312c, restraining material 313, and first suppressing member 315 are joined.

Finally, the energy absorbing device 310 can be manufactured by welding the second restraining member 314 around the restraining member 313 and welding the right (arrow R direction side) end of the restraining member 313 to the connecting member 330. Note that welding of the extension member 323 to the connecting member 330 may be performed in a step before welding the restraining material 313 to the connecting member 330, or after welding the restraining material 313 to the connecting member 330. It may be done in the process.

According to the energy absorbing device 310 manufactured as described above, when welding and joining each of the first base material 311, first intermediate materials 312a to 312c, and restraint material 313, each They can be welded next to each other (that is, with no gaps between them). Therefore, there is no need to weld while measuring the position of each member or to weld with a jig (spacer, etc.) in between. Therefore, manufacturing of the energy absorbing device 310 can be simplified.

In addition, the first base material 311, the first intermediate materials 312a to 312c, and the restraining material 313 (second restraining material 13b) are placed next to each other (that is, with no gap between them). The first base material 311, the first intermediate materials 312a to 312c, or the restraining material 313, on which the tensile force acts because the first base material 311, the first intermediate material, on which the compressive force acts. Buckling of the members 312a to 312c or the restraining member 313 can be prevented. As a result, the axial force can be applied evenly to the first intermediate members 312a to 312c, and when the first intermediate members 312a to 312c are plastically deformed, the energy of the axial force that acts on the energy absorbing device 310 can be easily absorbed.

Further, the distance between the first base material 311, the first intermediate materials 312a to 312c, and the restraining material 313 in the thickness direction of the first base material 311 (arrow FB direction) can be minimized. Therefore, when an axial force is applied to the energy absorbing device 310, an axial force is generated around the folded portions of the first base material 311, the first intermediate materials 312a to 312c, and the restraining material 313 folded back in a bellows shape. The bending moment can be reduced. As a result, the second suppressing member 314 and the first suppressing member 315 disposed on the restraining member 313 can be made smaller.

Further, in the energy absorbing device 310 in the third embodiment, the first base material 311 (the first iron plate 311a and the second iron plate 311b), the first intermediate materials 312a to 312c, and the restraining material 313 (the first The restraining member 313a and the second restraining member 313b) are each formed from a plate-shaped iron plate. Therefore, when an axial force acts on the energy absorbing device 310, the first base material 311 (the first iron plate 311a and the second iron plate 311b), the first intermediate materials 312a to 312c, and the restraint material 313 (the first The first restraining material 313a and the second restraining material 313b) can be easily expanded and contracted uniformly, and buckling of the energy absorbing device 310 can be suppressed.

Furthermore, the first base material 311, the first intermediate materials 312a to 312c, and the restraint material 313 (second restraint material 313b) are arranged in a bellows-like shape that reciprocates (folds back) in the left-right direction (arrow LR direction). connected to. Therefore, the actual member length from one end to the other end of the energy absorbing device 310 is smaller than the apparent length from one end to the other end of the energy absorbing device 310 by the first intermediate members 312a to 312c and the restraining material 313. It can also be made longer.

Therefore, the length over which the energy absorbing device 310 can be elastically deformed can be made longer than when the energy absorbing device 310 is formed from one end to the other end using a single piece of steel. Therefore, the amount of elastic deformation of the energy absorbing device 310 can be ensured.

As described above, in the energy absorbing device 310 in the third embodiment, the first intermediate members 312a to 312c disposed in a bellows shape that reciprocates (folds back) in the left-right direction (arrow LR direction) absorb energy. It is formed only on one side of the absorption device 310. Therefore, like the energy absorbing device 10 in the first embodiment described above, the first intermediate members 12a to 12c and the first Compared to the case where the second intermediate materials 22a to 22c are provided on both sides of the energy absorbing device 10, the number of parts can be reduced (because the second intermediate materials 22a to 22c are not provided on the other side), so manufacturing costs can be reduced. Can be done.

However, if a bellows shape that reciprocates (folds back) in the left-right direction (arrow LR direction) is formed only on one side of the energy absorbing device 310, the energy absorbing device When an axial force acts on the energy absorbing device 310, the stress acting on the extension member 323 disposed on the other side of the energy absorbing device 310 tends to be larger than that on the one side. Therefore, there was a possibility that the extension member 323 would be compressed and buckled.

On the other hand, in the energy absorbing device 310 according to the third embodiment, the first base material 311 is formed from a welded H-shaped steel formed by welding a plurality of iron plates, so the second iron plate 311b forms a pair of By changing the interval between the first iron plates 311a, the dimensions of the first base material 311 in the thickness direction (arrow FB direction) can be changed, and by changing the width of the pair of first iron plates 311a, the width direction ( The dimensions of the first base material 311 in the direction of the arrow UD can be changed. Further, by changing the thickness of the pair of first iron plate 311a and second iron plate 311b, the cross-sectional area of the first base material 311 in the cross section can be changed. Therefore, the thickness and width of the first base material 311 can be changed without changing the cross-sectional area of the first base material 311 in the cross section (that is, the degree of freedom of the outer shape of the first base material 311 in the cross section can be changed). (can be improved).

Therefore, by changing the outer shape of the first base material 311 in the cross section, the outer shape of the restraining material 313 in the cross section can be changed. Therefore, the outer shape of the extending member 323, which is formed to have substantially the same outer shape as the restraining member 313 in cross section, can be increased. As a result, when an axial force acts on the energy absorbing device 310, the stress acting on the extension member 323 can be reduced, and compressive buckling of the extension member 323 can be suppressed.

In addition, in the energy absorbing device 310 in the third embodiment, the restraining material 313 is formed from a welded four-sided box formed by welding a plurality of iron plates, so the outer shape of the first base material 311 in the cross section was changed. However, the outer shape of the restraining material 313 can be changed in accordance with the change in the outer shape of the first base material 311. Therefore, when the outer shape of the first base material 311 in the cross section is changed, it is possible to suppress the formation of a gap between the first intermediate material 312c and the first base material 311.

Further, in the energy absorbing device 310 in the third embodiment, the first base material 311 and the first intermediate materials 312a to 312c are set to have the same dimensions in the width direction, and both ends of each in the width direction are set to be the same. are arranged in contact with each of the pair of first restraining members 313a. Thereby, the first base material 311 and the first intermediate materials 312a to 312c can be prevented from being misaligned in the width direction (arrow UD direction).

Furthermore, in the energy absorbing device 310 according to the third embodiment, the thickness of the second restraint material 313b of the restraint material 313 and the first iron plate 311a of the first base material 311 is the same as that of the first intermediate materials 312a to 312c. Set to be the same as the plate thickness. As a result, when an axial force acts on the energy absorbing device 310, the axial force acting on the first intermediate members 312a to 312c becomes larger than the axial force acting on the restraint material 313 and the first base material 311. can be suppressed.

Here, in the energy absorbing device 310 in the third embodiment, a material having a lower yield point than the first base material 311 and the restraining material 313 in the stress-strain relationship (in the third embodiment, a low yield point steel material) is used. First intermediate materials 312a to 312c are formed from the above. Therefore, when an excessive axial force acts on the energy absorbing device 310, the first intermediate materials 312a to 312c are plastically deformed (reaching the yield point) before the restraining material 313 and the first base material 311. be able to. Therefore, when an excessive axial force acts on the energy absorbing device 310, the energy of the axial force acting on the energy absorbing device 310 is absorbed by plastically deforming the first intermediate members 312a to 312c, and the energy of the axial force acting on the energy absorbing device 310 is absorbed. The vibration damping properties of object 1 (see FIG. 1) can be improved.

In this case, since the first intermediate members 312a to 312c are formed from a low yield point steel material, the amount of plastic deformation can be ensured compared to SS material or SN material.

Note that the second restraining material 313b and the first base material 311 are arranged in the front-rear direction (arrow FB direction) of the first intermediate materials 312a to 312c. Therefore, when the first intermediate members 312a to 312c are plastically deformed, the first intermediate members 312a to 312c buckle in the front-rear direction due to the second restraining member 313b and the first base member 311. can be suppressed. Thereby, the first intermediate members 312a to 312c can be uniformly plastically deformed in the left-right direction (arrow LR direction). Therefore, the energy of the axial force acting on the energy absorbing device 310 can be easily absorbed by the plastic deformation of the first intermediate members 312a to 312c. As a result, the vibration damping properties of the structure 1 (see FIG. 1) can be improved.

Further, a suppressing plate 317 is disposed on the first base material 311 between the opposing first iron plates 311a. As a result, when an axial force acts on the energy absorbing device 310 and the first intermediate materials 312a to 312c press the first iron plate 311a in an attempt to buckle toward the first base material 311, the It is possible to suppress bending of the first iron plate 311a. Therefore, when an axial force is applied to the energy absorbing device 310, it is possible to prevent the first intermediate members 312a to 312c from buckling in the front-rear direction (direction of arrow FB) together with the first iron plate 311a.

Further, a joint between the first base material 311 and the first intermediate material 312a (a joint between the first intermediate material 312b and the first intermediate material 312c), a joint between the first intermediate material 312a and the first intermediate material A second suppressing member 314 and a rib 316 are provided at positions overlapping in the front-rear direction (in the direction of arrow FB) with the joint portions of 312b and 312b, respectively. Therefore, even if a bending moment acts on each joint due to the axial force acting on the energy absorbing device 310 (a force in the longitudinal direction (in the direction of arrow FB) acts on each joint), the first base material 311 The second restraining member 314 and the rib 316 can prevent the first iron plate 311a of the restraining member 313 and the second restraining member 313b of the restraining member 313 from bending in the front-rear direction (arrow FB direction). Therefore, the first intermediate members 312a to 312c can be uniformly plastically deformed. Therefore, the energy of the axial force acting on the energy absorbing device 310 can be easily absorbed by the plastic deformation of the first intermediate members 312a to 312c. As a result, the vibration damping properties of the structure 1 (see FIG. 1) can be improved.

In addition, the welds (welding marks Y) at each joint connecting the first base material 311 and the first intermediate materials 312a to 312c in a bellows shape are lengthened in the left-right direction (arrow LR direction). Therefore, the rigidity of each joint portion (folded portion) of the first base material 311 and the first intermediate materials 312a to 312c can be increased.

Therefore, when a bending moment acts on each joint due to the axial force acting on the energy absorbing device 310 (a force in the longitudinal direction (in the direction of arrow F-B) acts on each joint), each joint Can prevent bending. Therefore, it is possible to prevent each joint from bending in the front-rear direction (arrow FB direction) and increase the contact resistance between each joint and a member adjacent to each joint in the front-rear direction. Therefore, when the first intermediate members 312a to 312c expand and contract in the left-right direction (arrow LR direction) due to the axial force acting on the energy absorbing device 310, the sliding of the first intermediate members 312a to 312c in the left-right direction It is possible to suppress deterioration of mobility. As a result, the energy absorbing device 310 can exhibit the designed energy absorbing effect.

Note that the welding distance in the left-right direction (arrow LR direction) of each joint connecting the first base material 311 and the first intermediate materials 312a to 312c in a bellows shape is the welding distance of the first intermediate material 312a to 312c to be welded. Since the thickness is set to be more than twice the thickness of the materials 312a to 312c in the front-rear direction (arrow FB direction), a cross section of the energy absorbing device 310 cut in the vertical direction (arrow UD direction) and perpendicular to the plane. The cross-sectional shape of each joint in (the cross-section shown in FIG. 7) can be made longer in the left-right direction than in the front-back direction. As a result, when an axial force is applied to the energy absorbing device 310, it is possible to easily prevent each joint from deflecting in the left-right direction due to the shear force acting on each joint, and the welds at each joint can be prevented from breaking. can be suppressed.

Furthermore, since the energy absorbing device 310 includes the spaces K1 and K2 (see FIG. 7), when the first intermediate members 312a to 312c are plastically deformed by the axial force acting on the energy absorbing device 310, the first intermediate members 312a to 312c are It is possible to suppress the intermediate members 312a to 312c from colliding with the first suppressing member 315 and the connecting member 330. Therefore, the first intermediate members 312a to 312c can be uniformly plastically deformed. Therefore, the energy of the axial force acting on the energy absorbing device 310 can be easily absorbed by the plastic deformation of the first intermediate members 312a to 312c. As a result, the vibration damping properties of the structure 1 (see FIG. 1) can be improved.

Note that if the space K1 is provided here, a new problem arises in that the joint between the first intermediate material 312c and the second restraining material 313b is likely to buckle toward the first base material 311. . On the other hand, in the energy absorbing device 310 according to the third embodiment, the restraint material 313 is joined to the first restraining member 315. Therefore, the first suppressing member 315 can prevent the joint between the first intermediate material 312c and the second restraining material 313b from buckling toward the first base material 311.

That is, the first restraining member 315 restrains the joint between the first intermediate member 312c and the second restraining member 313b from buckling outward of the energy absorbing device 310 in the front-rear direction (arrow FB direction). Not only this, but also it is possible to prevent the energy absorbing device 310 from buckling inward in the front-rear direction. Therefore, there is no need to newly provide a member for suppressing buckling of the joint between the first intermediate member 312c and the second restraining member 313b inside the energy absorbing device 310. Therefore, manufacturing of the energy absorbing device 310 can be simplified.

Next, with reference to FIG. 8, an energy absorbing device 410 in a fourth embodiment will be described. In the first embodiment, a case has been described in which the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c are arranged at positions where they overlap in the front-rear direction (arrow FB direction). In the energy absorbing device 410 in the fourth embodiment, the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c are arranged shifted in the left-right direction (arrow LR direction). Note that the same parts as in each of the embodiments described above are given the same reference numerals, and the explanation thereof will be omitted.

8(a) and 8(b) are cross-sectional views of the energy absorbing device 410 in the fourth embodiment, and correspond to the cross section of the energy absorbing device 10 taken along line IIIb-IIIb in FIG. 2(b). Further, FIG. 8(a) shows a state before the axial force acts on the energy absorbing device 410, and FIG. 8(b) shows the state after the axial force acts on the energy absorbing device 410. . Furthermore, in FIGS. 8(a) and 8(b), each welding trace is illustrated with a Y symbol.

As shown in FIG. 8(a), the energy absorbing device 410 in the fourth embodiment includes a plurality of energy absorbing devices 410 on each side of the first base material 11 and the second base material 21 in the front-rear direction (arrow FB direction). (Three in the fourth embodiment) The first intermediate materials 412a to 412c and the second intermediate materials 422a to 422c, which are arranged in an overlapping manner, are shifted from the adjacent members in the left-right direction (arrow LR direction). will be placed.

Note that the first intermediate materials 412a to 412c and the second intermediate materials 422a to 422c are symmetrical on the left and right with respect to a plane located approximately in the middle of the energy absorbing device 410 in the left and right direction (arrow LR direction). formed into a shape. Therefore, the following description will mainly explain the first intermediate materials 412a to 412c arranged on the left side (arrow L direction side), and the second intermediate material 422a arranged on the right side (arrow R direction side). A detailed explanation of 422c will be omitted.

The first intermediate material 412a is placed a predetermined distance from the right (arrow R direction side) end of the first base material 11, and the right end is welded (welded) to the first base material 11. They are connected by a trace Y). In this case, the welding (welding mark Y) connecting the first intermediate material 412a and the first base material 11 extends from the right end of the first intermediate material 412a to the right end of the first base material 11. be welded.

The first intermediate material 412b is placed a predetermined distance away from the left (arrow L direction side) end of the first intermediate material 412a, and the left end is welded (welded) to the first intermediate material 412a. They are connected by a trace Y). In this case, the welding (welding mark Y) connecting the first intermediate material 412b and the first intermediate material 412a extends from the left end of the first intermediate material 412b to the left end of the first intermediate material 412a. be welded.

Further, the first intermediate material 412c is placed at a position a predetermined distance away from the right (arrow R direction side) end of the first intermediate material 412b, and the right end is welded to the first intermediate material 412b. They are connected by (welding trace Y). In this case, the welding (welding mark Y) connecting the first intermediate material 412c and the first intermediate material 412b extends from the right end of the first intermediate material 412c to the right end of the first intermediate material 412b. be welded.

Note that the right end (arrow R direction side) of the first intermediate material 412b is set at approximately the same position as the right end of the first base material 11 in the front-rear direction (arrow FB direction), The left end (direction of arrow L) of the first intermediate material 412c is set at substantially the same position as the left end of the first base material 11 in the front-rear direction (direction of arrow FB). Therefore, welding between the first intermediate material 412a and the first base material 11 (welding mark Y), welding between the first intermediate material 412b and the first intermediate material 412a (welding mark Y), and the first When the welding distances of the intermediate material 412c, the first intermediate material 412b, and the welding (welding trace Y) in the left-right direction (arrow LR direction) are the same, the left and right of the first intermediate materials 412a to 412c The dimensions in the directions can be made the same.

Further, in the fourth embodiment, since the welding distance of the folded portions between the first base material 11 and the first intermediate materials 412a to 412c is increased in the left-right direction, the welding distance between the first base material 11 and the first intermediate materials 412a to 412c is The rigidity of each joint (folded portion) with the materials 412a to 412c can be increased.

Next, a case where an axial force acts on the energy absorbing device 410 of the fourth embodiment will be described with reference to FIG. 8(b). Note that FIG. 8(b) shows a case where an axial force that pulls the first base material 11 and the second base material 21 is applied to the outside in the left-right direction (arrow LR direction).

As shown in FIG. 8(b), when an axial force acts on the energy absorbing device 410, compressive force and tensile force are alternately applied to the members adjacent in the front-rear direction (direction of arrow F-B) with the folded portion as a boundary. Therefore, the joint between the first intermediate member 412a and the first intermediate member 412b is stronger than the joint (folded part) between the first intermediate member 412c and the restraining member 13 (second restraining member 13b). (folded part) protrudes to one side (arrow L direction side).

Therefore, there is no member that overlaps on the outside in the front-rear direction (arrow FB direction) of the joint (folded part) between the first intermediate material 412a and the first intermediate material 412b. Therefore, due to the bending moment acting on the joint (folded part) between the first intermediate material 412a and the first intermediate material 412b, the joint (folded part) between the first intermediate material 412a and the first intermediate material 412b is ) could bend outward in the front-rear direction (direction of arrow F-B). Furthermore, since there is no overlapping member on the first base material 11 side, the joint portion (folded portion) between the first intermediate material 412b and the first intermediate material 412c may bend inward.

Note that, contrary to the state shown in FIG. 8(b), when the first base material 11 and the second base material 21 are pressed inward in the left-right direction (arrow LR direction), the first base material 11 and the second base material 21 The joint between the base material 11 and the first intermediate material 412a protrudes inward in the left-right direction. In this case, since the first intermediate material 412a is connected to the first base material 11 on both sides in the front-rear direction (direction of arrow FB), the first intermediate material 412a is connected to the first base material 11 on the side where the bending moment exerted on the joint portion is large. There was a possibility that the joint (folded part) between the base material 11 and the first intermediate material 412a would be bent.

When bending in the front-rear direction (arrow FB direction) occurs in the folded portions of the first base material 11 and the first intermediate materials 412a to 412c, the first base material 11 and the first intermediate materials Calculation of the energy absorption force due to the expansion and contraction of the restraining material 13 and 412a to 412c becomes complicated. Furthermore, when each member of the first base material 11, first intermediate materials 412a to 412c, and restraint material 13 expands and contracts in the left-right direction (arrow LR direction), the front-rear direction (arrow FB direction) ) may come into contact with adjacent members and create resistance during expansion and contraction, making it impossible to exert the calculated energy absorption ability.

On the other hand, in the fourth embodiment, as described above, the welding (welding mark Y) of the folded portion between the first base material 11 and the first intermediate materials 412a to 412c is performed in the left-right direction (arrow LR direction). ), an axial force acts on the energy absorbing device 410, causing each folded portion of the first base material 11 and the first intermediate materials 412a to 412c to move in the left-right direction (arrow L- When the first base material 11 and the first intermediate materials 412a to 412c are protruded in the R direction, the respective folded portions of the first base material 11 and the first intermediate materials 412a to 412c can be prevented from bending in the front-rear direction (the direction of the arrow FB). As a result, the energy absorption capacity of the energy absorption device 410 can be easily calculated, and the calculated energy absorption capacity can be exerted.

In addition, in the fourth embodiment, the length in the left-right direction (arrow LR direction) of the welding trace Y of each folded portion of the first base material 11 and the first intermediate materials 412a to 412c is determined by energy absorption. Within the range where the axial force that can be absorbed by the device 410 acts, the welding (welding The length is set so that the mark Y) does not protrude outward in the left-right direction. This makes it possible to prevent the folded portions of the first base material 11 and the first intermediate materials 412a to 412c from bending in the front-rear direction (direction of arrow FB).

Next, an energy absorbing device 510 in a fifth embodiment will be described with reference to FIGS. 9 and 10. In the second embodiment, the first intermediate material 12 is arranged in such a state that the side surface of the first intermediate material 12 is parallel to the side surfaces of the first base material 11 and the restraining material 13 (second restraining material 13b). In the energy absorbing device 510 according to the fifth embodiment, the first intermediate material 512 is provided with a side surface non-parallel to the first base material 511. A case where the intermediate material 512 is arranged will be described. Note that the same parts as in each of the embodiments described above are given the same reference numerals, and the explanation thereof will be omitted.

9(a) is a side view of the energy absorbing device 510 in the fifth embodiment, and FIG. 9(b) is a side view of the energy absorbing device 510 as viewed in the direction of arrow IXb in FIG. 9(a), 10(a) is a cross-sectional view of the energy absorbing device 510 taken along the Xa-Xa line in FIG. 9(a), and FIG. 10(b) is a cross-sectional view of the energy absorbing device 510 taken along the Xb-Xb line in FIG. FIG.

In addition, in FIGS. 10(a) and 10(b), welding marks where a first base material 511, a first intermediate material 512, and a restraining material 513, which will be described later, are welded are shown with the symbol Y. be done.

As shown in FIGS. 9 and 10, the energy absorption device 510 in the fifth embodiment extends along the left-right direction (arrow LR direction) and is disposed on one side in the left-right direction (arrow L direction side). A plurality of sheets or one sheet (one sheet in the third embodiment) is arranged in an overlapping manner on each of the first base material 511 provided and on both sides of the first base material 511 in the front-rear direction (arrow FB direction). It is formed mainly of a first intermediate material 512 , which is made of plastic, and a rectangular tube-shaped restraint material 513 that is disposed to surround the first base material 511 and the first intermediate material 512 .

The first base material 511 is formed from an SN material or a low yield point steel material, and has its thickness direction (thickness direction) oriented in the front-rear direction (arrow FB direction), and its width direction in the up-down direction (arrow UD direction). direction).

Note that the first base material 511 is not limited to SN material or low yield point steel material, and may be formed from other general steel materials (for example, SS material, SM material, or SUS material). Further, the first base material 511 is not formed from a single iron plate, but a pair of iron plates and a connection connecting the pair of iron plates, like the first base material 311 in the third embodiment. It may be formed from other members.

In addition, the end of the first base material 511 on the other side (arrow R direction side) is formed from an iron plate of SS material or SN material, and is perpendicular to the left-right direction (arrow LR direction) of the energy absorbing device 510. A regulating plate 518 is disposed with its plane parallel to the direction in which it is disposed. Note that the regulating plate 518 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

The regulating plate 518 is disposed inside the restraining member 513 formed into a rectangular tube shape, and has an outer shape that is slightly smaller than the inside of the restraining member 513. Further, the regulating plate 518 is connected to the other end (in the direction of arrow R) of the first base member 511 with a predetermined gap between the regulating plate 518 and the inner surface of the restraining member 513 . As a result, when an axial force acts on the energy absorbing device 510 and the first base material 511 moves in the left-right direction (arrow LR direction), the restraining material 513 and the regulating plate 518 come into contact with each other, and the first base material 511 The movement of the first base material 511 in the left-right direction can be suppressed from being restricted, and when the other end of the first base material 511 tries to bend in the front-rear direction (in the direction of the arrow F-B), it can be restrained. By bringing the regulating plate 518 into contact with the inner surface of the material 513, bending of the other side (the side in the direction of arrow R) of the first base material 511 can be restricted.

Further, on the first base material 511 disposed inside the restraining material 513, a second regulating plate 519 formed from an iron plate of SS material or SN material is provided in the left and right direction of the energy absorbing device 510 (arrow L- They are arranged with their planes arranged in parallel along a direction perpendicular to the R direction), and a plurality of them are arranged at predetermined intervals in the left-right direction.

The second regulating plate 519 is a member that suppresses bending of the first base material 511 in the front-rear direction like the regulating plate 518, and is a member on both sides of the first base material 511 in the front-rear direction (arrow FB direction). The restraining member 513 is disposed on the side surface and is formed in a size that leaves a predetermined gap with the inner surface of the restraining member 513 which is formed into a rectangular tube shape.

Furthermore, the second regulating plate 519 is configured to be able to regulate the deformation of the first intermediate material 512 in the vertical direction (arrow UD direction), and pinches the outside of the first intermediate material 512 in the vertical direction. They are arranged in pairs in the same manner. Further, the second regulating plate 519 is disposed at a position that leaves a predetermined gap between the first intermediate member 512 and the first intermediate member 512 in the vertical direction. Thereby, when the first intermediate material 512 bends in the front-back direction (arrow FB direction), the bending of the first intermediate material 512 can be suppressed from being restricted by the second regulating plate 519, and When the first intermediate material 512 deforms in the vertical direction, the vertical deformation of the first intermediate material 512 can be restricted.

Further, on one side (arrow L direction side) of the first base material 511, reinforcing plates 511c are provided on both sides in the front-rear direction (arrow FB direction). Therefore, when an axial force acts on the energy absorbing device 510, the reinforcing plate 511c prevents one side (the side in the direction of arrow L) of the first base material 511 located outside the restraint material 513 from bending in the front-rear direction. It can be suppressed.

The first intermediate material 512 is formed into a plate shape from the same material as the first base material 511, and extends from the center toward the outside in the left-right direction (arrow LR direction) of the energy absorbing device 510. It is arranged in such a manner that it is inclined away from the outside in the front-rear direction (direction of arrow FB).

Further, the end of the first intermediate material 512 on the other side (arrow R direction side) is arranged at a position where it comes into contact with the side surface of the first base material 511 in the thickness direction (arrow FB direction), It is connected to the first base material 511 by welding. Note that the first base material 511 and the first intermediate material 512 are connected by welding together with a regulating plate 518 disposed at the other end of the first base material 511.

Furthermore, the end of the first intermediate member 512 on one side (the side in the direction of arrow L) is disposed at a position where it abuts the inner surface of the restraining member 513, and is connected to the restraining member 513 by welding. Note that the restraining member 513 and the first intermediate member 512 are connected together by welding together with the first restraining member 315 disposed at one end of the restraining member 513. In addition, in FIG. 10A, a groove is formed in the entire area on one side of the first intermediate material 512 for welding, but a groove is formed in a part of one side of the first intermediate material 512. It may be a type that forms a groove or a type that does not form a groove.

The restraining material 513 is formed from a square steel pipe (BCR295 in this embodiment) made of a material having a higher yield point than the first base material 511 and the first intermediate material 512. A first suppressing member 315 is provided at one end (the side in the direction of arrow L) of the restraining member 513 . Furthermore, a cross-shaped plate, which is disposed on the other side of the extension member 323 in the third embodiment, is disposed at the end of the restraining member 513 on the other side (arrow R direction side). Thereby, the other side of the restraining member 513 can be connected to the gusset plate 4 of the structure 1 (see FIG. 1), and the energy absorbing device 510 can be disposed in the structure 1.

Note that the other side (arrow R direction side) of the restraining member 513 does not need to be connected to the gusset plate 4 of the structure 1. For example, similarly to the energy absorbing device 10 in the first embodiment, the first base material 511 and the first intermediate material 512 disposed on one side (arrow L direction side) of the restraining material 513 are used as restraining materials. It may also be arranged on the other side of the gusset plate 513 to connect the first base material 511 arranged on the other side to the gusset plate 4.

Second reinforcing plates 513c made of iron plates made of SS material or SN material are disposed on both sides of the restraining member 513 in the front-rear direction (direction of arrow FB) on one side (direction of arrow L). The second reinforcing plate 513c is a member that reinforces the restraint material 513 so that the restraint material 513 does not bend due to the force transmitted from the first intermediate material 512 to the restraint material 513 when an axial force acts on the energy absorption device 510. , and is arranged at a position overlapping one side of the first intermediate member 512 in the front-rear direction. Note that the second reinforcing plate 513c is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material) as long as the restraining material 513 can be reinforced.

Further, in the fifth embodiment, the cross-sectional area of the first base material 511, the cross-sectional area of the two first intermediate materials 512, and the cross-sectional area of the restraining material 513 are , are formed identically. As a result, when an axial force is applied to the energy absorbing device 510, the first base material 511 and the first intermediate material 512, which are made of a material with a lower yield point than the restraining material 513, are deformed first. Can be done. As a result, the first base material 511 and the first intermediate material 512 can be deformed to absorb the axial force acting on the energy absorbing device 510.

Furthermore, since the first base material 511 and the first intermediate material 512, which are made of a material with a lower yield point than the restraining material 513, can be deformed first, the restraining material 513 can be formed from a square steel pipe. . Therefore, it is no longer necessary to form the restraint material 513 from a welded four-sided box like the restraint material 313 in the third embodiment, so that the manufacturing cost of the restraint material 513 can be suppressed.

Further, in the fifth embodiment, as described above, the first intermediate material 512 is arranged diagonally with respect to the first base material 511, and the first intermediate material 512 is arranged diagonally with respect to the first base material 511, and the first A predetermined gap is formed between the base material 511 and the restraining material 513. Therefore, when the first intermediate material 512 is deformed by an axial force that presses it inward in the left-right direction (arrow LR direction) and acts on the energy absorption device 510, the first intermediate material 511 and the restraint The first intermediate material 512 can be bent and deformed in the front-rear direction (in the direction of arrow FB) at a plurality of positions in the left-right direction by using the gap formed between the first intermediate material 513 and the first intermediate material 513. Due to the deformation in which the first intermediate member 512 is bent in the front-rear direction, in the fifth embodiment, it is possible to easily absorb the axial force acting outward in the left-right direction.

On the other hand, the first base material 511 is prevented from bending in the front-rear direction (arrow FB direction) by the regulating plate 518 and the second regulating plate 519 when an axial force acts on the energy absorbing device 510 as described above. Regulated. Therefore, in the fifth embodiment, by deforming the first base material 511, the first base material It is possible to prevent the force transmitted from 511 from becoming uneven. As a result, it is possible to suppress the energy absorbing power of the energy absorbing device 510 from decreasing.

Furthermore, in the fifth embodiment, the first intermediate material 512 is arranged diagonally with respect to the first base material 511, and both ends of the first base material 511, the restraining material 513, and the first intermediate material 512 are connected, so the first base material 511, first intermediate material 512, and restraint material 13 (second restraint material) are connected in a bellows shape that reciprocates (folded) in the left-right direction (arrow LR direction). The distance by which the connecting portion (joint portion) of each member with the material 13b) is separated in the front-rear direction (direction of arrow FB) can be minimized. This makes it possible to reduce the bending moment generated around each joint (folded portion) folded back in a bellows shape. As a result, a reinforcing material for suppressing bending of each joint portion (folded portion) folded back in a bellows shape is unnecessary, or the reinforcing material can be made small.

In the fifth embodiment, the first base material 511 and The cross-sectional area of the first intermediate material 512 is made sufficiently small. Therefore, by changing the aspect ratio of the cross section of the first base material 511 and the first intermediate material 512, the cross-sectional area of the cross section of the first base material 511 and the first intermediate material 512 can be changed. The gap between the first base material 511, the first intermediate material 512, and the first base material 511 in the front-rear direction (arrow FB direction) can be changed while maintaining the same.

Although the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments, and it is readily understood that various modifications and improvements can be made without departing from the spirit of the present invention. This can be inferred.

In the first and second embodiments described above, each joint portion (folded portion in a bellows shape) of the first base material 11, the first intermediate material 12, and the second restraining material 13b is reinforced with a reinforcing material. Although the structure for this is omitted, a reinforcing material may be placed at each joint.

For example, as in the energy absorbing device 610 of the first modified example shown in FIG. . Note that FIG. 11(a) is a cross-sectional view of the energy absorbing device 610 in the first modification, and corresponds to the cross section of the energy absorbing device 10 taken along the line Va-Va in FIG. 3(b).

In the energy absorbing device 610 shown in FIG. 11(a), a predetermined gap is formed between the first intermediate material 12c and the second restraining material 13b facing each other. Further, a reinforcing material 616 is provided on the side surface of the second restraining material 13b on the side facing the first intermediate material 12c.

The reinforcing member 616 is formed from a steel plate, and is arranged with its thickness direction facing the up-down direction (arrow UD direction) and its width direction facing the front-rear direction (arrow FB direction). In addition, at least a portion of the reinforcing material 616 is connected to the joints (the bellows-shaped parts) of the first base material 11, the first intermediate material 12, and the second restraint material 13b in the front-rear direction. are placed in overlapping positions.

In addition, if the reinforcing material 616 is disposed in a position where at least a part thereof overlaps each joint part (the part folded back in a bellows shape) in the front-rear direction, the dimension in the longitudinal direction (arrow LR direction) is , may be formed smaller than the longitudinal dimension of the first intermediate members 12a to 12c, or may be formed to have the same longitudinal dimension as the second restraining material 13b.

Further, three reinforcing members 616 are provided on each of the pair of second restraining members 13b at a predetermined interval in the vertical direction (arrow UD direction), and three reinforcing members 616 are provided in the front-rear direction (arrow FB direction). One side is welded to the side surface of the second restraint member 13b, and the other side in the front-rear direction is brought into contact with the first intermediate member 12c.

In the energy absorbing device 610 configured as described above, when each joint tries to deform in the front-rear direction (in the direction of arrows B-F) due to the bending moment acting on each joint (the part folded back in a bellows shape), , its longitudinal deformation can be restricted by the reinforcing member 616. As a result, buckling of the energy absorbing device 610 can be suppressed.

In addition, not only the energy absorbing device 610 of the first modified example shown in FIG. 11(a) but also the energy absorbing device 710 of the second modified example shown in FIG. A pair of reinforcing members 716 may be arranged on both sides of the opposing members 13b. Note that FIG. 11(b) is a cross-sectional view of the energy absorbing device 710 in the second modification, and corresponds to the cross section of the energy absorbing device 10 taken along the line Va-Va in FIG. 3(b).

In the energy absorbing device 710 shown in FIG. 11(b), both ends of the pair of first restraints 13a in the width direction are formed to have dimensions that protrude more outward than the pair of second restraints 13b, and the second restraints The member 13b is disposed between the pair of first restraining members 13a facing each other. A reinforcing member 716 is provided between the pair of first restraining members 13a facing each other in a region protruding outward from the pair of second restraining members 13b.

The reinforcing member 716 is formed from a steel plate, and is arranged with its thickness direction facing the left-right direction (arrow LR direction) and its width direction facing the front-rear direction (arrow FB direction). Further, the reinforcing material 716 is arranged at a position overlapping in the front-back direction with each joint portion (the part folded back in a bellows shape) of the first base material 11, the first intermediate material 12, and the second restraining material 13b. will be established.

Furthermore, both ends of the reinforcing member 716 in the longitudinal direction (arrow UD direction) are welded to each of the pair of first restraining members 13a, and the reinforcing member 716 is welded to each of the pair of first restraining members 13a in the width direction (arrow FB direction). The end on the 13b side is welded to the second restraining member 13b.

In the energy absorbing device 710 configured as described above, when each joint portion attempts to deform in the front-rear direction (arrow B-F direction) due to the bending moment acting on each joint portion (the bellows-shaped folded portion), , its longitudinal deformation can be restricted by the reinforcing member 716. As a result, buckling of the energy absorbing device 710 can be suppressed.

In addition, in the energy absorbing device 710 in the second modified example, each joint portion (folded portion in a bellows shape) of the second base material 21, the second intermediate material 22, and the second restraining material 13b Reinforcing members 716 are also arranged at positions that overlap in the front-back direction, and four reinforcing members 716 are arranged on each side of the energy absorbing device 710 in the front-back direction.

In addition, the energy absorbing device 710 in the second modification is not limited to the one in which the reinforcing material 716 is disposed at a position overlapping each joint portion (the part folded back in a bellows shape) in the front-rear direction, but is reinforced at other positions. A material 716 may be provided. For example, one reinforcing material 716 is placed between the joints of the first base material 11, the first intermediate material 12, and the second restraining material 13b in the left-right direction (arrow LR direction). The above arrangement may also be provided.

Furthermore, the energy absorbing device 710 in the second modified example is not limited to one in which the reinforcing material 716 is disposed at a position that overlaps all of the joint parts (the parts folded back in a bellows shape), but only one of the joint parts. A reinforcing member 716 may be provided at a position overlapping the joint portion of the portion. For example, the reinforcing material 716 is disposed only at a position overlapping in the front-back direction with each joint (a bellows-shaped folded part) formed on the center side in the left-right direction (arrow LR direction) of the energy absorbing device 710, and the reinforcing material 716 is Two sheets may be disposed on each side of the absorption device 710 in the front-rear direction.

In addition, not only the energy absorbing device 710 of the second modified example shown in FIG. 11(b) but also the energy absorbing device 810 of the third modified example shown in FIG. Furthermore, a second reinforcing member 817 may be arranged. Note that FIG. 12(a) is a sectional view of the energy absorbing device 810 in the third modification, and corresponds to the cross section of the energy absorbing device 10 taken along the line Va-Va in FIG. 3(b).

In the energy absorbing device 810 shown in FIG. 12(a), both ends of the pair of first restraints 13a in the width direction are formed to have dimensions that protrude outward from the pair of second restraints 13b, and the second restraints The member 13b is disposed between the pair of first restraining members 13a facing each other. Further, a reinforcing member 716 is disposed between the pair of first restraining members 13a facing each other in a region protruding outward from the pair of second restraining members 13b. Furthermore, a second reinforcing member 817 is disposed at the end portions of the pair of first restraining members 13a that protrude further outward than the pair of second restraining members 13b.

The second reinforcing member 817 is formed from a steel plate and is arranged with the plate thickness direction facing the front-rear direction (arrow FB direction). Further, the second reinforcing member 817 is formed to have the same length as the second restraining member 13b in the left-right direction (arrow LR direction), and is located outside between the opposing first restraining members 13a. The length is set so that both ends in the width direction protrude. As a result, the reinforcing material 716 is sandwiched between the second restraining material 13b and the second reinforcing material 817 facing each other. Note that a portion of the second reinforcing member 817 that protrudes outward between the pair of first restraining members 13a facing each other is welded to the first restraining member 13a.

In the energy absorbing device 810 configured as described above, as in the second modification, the bending moment acting on each joint (the bellows-shaped part) causes each joint to bend in the front-rear direction (arrows B-F direction), the reinforcing member 716 can restrict the deformation in the front-rear direction.

In this case, in the energy absorbing device 810, the second reinforcing member 817 is disposed outside the reinforcing member 716, so that the force that tends to deform each joint in the front-rear direction (in the direction of arrows B-F) The second reinforcing member 817 can prevent the reinforcing member 716 from bending in the front-rear direction together with the second restraining member 13b. This prevents the second restraint material 13b from bending in the front-rear direction even when the thickness of the second restraint material 13b is set smaller than the thickness of the first intermediate materials 12a to 12c. It can be suppressed.

In the third embodiment, a case has been described in which the first base material 311 is formed from a steel material (welded H-shaped steel) obtained by welding three iron plates into an H-shape, but the invention is not necessarily limited to this.

For example, as in a fourth modified energy absorbing device 910 shown in FIG. 12(b), the first base material 911 may be formed from a steel material obtained by welding four iron plates into a rectangular tube shape. Note that FIG. 12(b) is a cross-sectional view of the energy absorbing device 910 in the fourth modification, and corresponds to the cross section of the energy absorbing device 310 along the line VIb-VIb in FIG. 6(a).

In the energy absorbing device 910 shown in FIG. 12(b), a first base material 911 is formed of a square tube-shaped steel material (welded four-sided box) by welding four iron plates, and a pair of first iron plates 311a are connected by a pair (two) of second iron plates 911b.

Therefore, in the fourth modification, since the pair of first iron plates 311a can be supported at two locations (two second iron plates 911b), the first It is possible to easily suppress the bending of the iron plate 311a in the front-rear direction (arrow FB direction). Therefore, in the first base material 911 in the fourth modification, the ribs 316 (see FIG. 7) provided on the first base material 311 of the energy absorbing device 310 in the third embodiment can be omitted.

Note that ribs 316 may be provided on the first base material 911. In this case, when the first iron plate 311a and the second iron plate 911b of the first base material 911 are welded to form a rectangular tube shape, the ribs 316 are welded to the inside of the first base material 911. , the ribs 316 can be disposed inside the first base material 911.

In the third embodiment, only the left side (arrow L direction side) of the first intermediate material 312c is arranged on the left side of the first intermediate materials 312a and 312b in the left-right direction (arrow LR direction). has been described, but it is not necessarily limited to this.

For example, as shown in FIG. 13(a), both sides of the plurality of first intermediate members 312 in the left-right direction (arrow LR direction) may be staggered and arranged. Note that FIG. 13(a) is a cross-sectional view of the energy absorbing device 1010 in the fifth modification, and corresponds to the cross section of the energy absorbing device 310 taken along line VII-VII in FIG. 6(a).

As shown in FIG. 13(a), in the energy absorbing device 1010 in the fifth modification, five first intermediate materials are placed on each side of the first base material 311 in the front-rear direction (arrow FB direction). 312 is arranged. In the following description, reference numerals 312a to 312e are given sequentially from the first intermediate material 312 disposed on the side closer to the first base material 311.

In addition, in the fifth modification, compared to the first intermediate materials 312b and 312d disposed at even-numbered positions from the first base material 311 in the front-rear direction (arrow FB direction), the first The first intermediate materials 312a, 312c, and 312e disposed at odd-numbered positions from the base material 311 are formed long in the left-right direction (arrow LR direction). Further, the first intermediate members 312b and 312d arranged at even-numbered positions are set to have the same length, and the first intermediate members 312a, 312c, and 312e arranged at odd-numbered positions are set to the same length. As a result, when stacking a plurality of first intermediate materials 312a to 312e, if the positions of both ends of the first intermediate materials 312a to 312d in the left-right direction (arrow LR direction) are arranged to match the welding position, The first intermediate members 312a to 312d can be arranged in a stepped manner.

Note that in the fifth modification, the first intermediate materials 312a to 312d are arranged in a stepped manner, so when the first intermediate materials 312a to 312d are stacked and arranged, ) (in the fifth modification, the right (arrow R direction side) end) can be exposed to the outside in the front-rear direction. That is, the joint between the first base material 311 and the first intermediate material 312a, the joint between the first intermediate material 312b and the first intermediate material 312c, and the joint between the first intermediate material 312d and the first intermediate material. The other first intermediate members 312a to 312d can be kept from overlapping the joint portion of the first intermediate member 312e and the outside in the front-rear direction.

Therefore, in the fifth modification, even when the first intermediate materials 312a to 312d are stacked, one end (the joint between the first base material 311 and the first intermediate material 312a, A joint between the first intermediate material 312b and the first intermediate material 312c and a joint between the first intermediate material 312d and the first intermediate material 312e can be welded.

Therefore, in the fifth modification, the first intermediate material 312a arranged on the first sheet (odd numbered sheet) and the first intermediate material 312b arranged on the second sheet (even numbered sheet). A plurality of welded structures are first created (before they are arranged on the first base material 311), and these multiple structures are stacked on the first base material 311, and one side (right side) ), the energy absorbing device 910 can be manufactured by welding the structures together. In this case, there is no need to alternately weld the first intermediate materials 312a to 312e one by one on the left and right sides (to go back and forth from side to side), so that manufacturing of the energy absorbing device 910 can be simplified.

In addition, in the fifth modification, the second restraining member 314 disposed surrounding the restraining material 313 is the first intermediate member disposed at the farthest position from the first base material 311. It is arranged at a position overlapping both ends of 312e in the front-back direction. Thereby, when each joint of the first intermediate members 312a to 312d tries to deform outward in the front-rear direction, the restraining member 313 can be restrained from deflecting at the position where force is concentrated. Therefore, there is no need to increase the number of second suppressing members 314 arranged or to increase the external shape of the second suppressing members in the left-right direction in accordance with the step-like arrangement of the first intermediate members 312a to 312e. It is possible to suppress an increase in manufacturing costs.

Further, in the fifth modification, the left side (arrow L direction side) end of the second restraining member 313b is joined to the first intermediate member 312e, and the first restraining member 315 (see FIG. 7) is omitted. Ru. This eliminates the need to form a groove at the time of welding on the side of the first intermediate material 312e, so that the shapes of the odd-numbered first intermediate materials 312a, 312c, and 312e can be made the same. As a result, it is possible to suppress incorrect assembly of the first intermediate material 312e during manufacturing of the energy absorbing device 910.

In the first to third embodiments described above, the energy absorbing devices 10, 210, and 310 are arranged in a rectangular structure surrounded by a pair of columns 2 and a pair of beams 3 of a structure 1 (see FIG. 1) composed of columns 2 and beams 3. Although the case has been described in which the device is arranged in a space of

For example, as shown in FIG. 13(b), it may be arranged between a bridge 1150 and a pier 1160 of the bridge 1150 to absorb the energy of the force transmitted from the bridge 1150 to the pier 1160. Note that FIG. 13(b) is a cross-sectional view of the energy absorbing device 1110 in the sixth modification, and corresponds to the cross section of the energy absorbing device 310 taken along the line VII-VII in FIG. 6(a). Further, in FIG. 13(b), the energy absorbing device 1110 is arranged between the bridge 1150 and the pier 1160 with the longitudinal direction (left-right direction (arrow LR direction)) of the energy absorbing device 1110 facing the direction of gravity. Ru.

As shown in FIG. 13(b), the energy absorbing device 1110 in the sixth modification is arranged with the restraining material 1113 of the energy absorbing device 1110 embedded in the pier 1160 of the bridge 1150, and A bridge 1150 is placed on one end (the side in the direction of arrow L) of the material 311 .

The energy absorption device 1110 in the sixth modification includes a first base material 311 and a plurality of energy absorbing devices (in the sixth modification (2 sheets) Mainly includes a first intermediate material 312 arranged in an overlapping manner, and a rectangular tube-shaped restraining material 1113 arranged surrounding the first base material 311 and the first intermediate material 312. It is formed by In the following description, reference numerals 312a and 312b are sequentially given to the first intermediate material 312 disposed on the side closer to the first base material 311.

Further, similar to the restraint material 313 in the third embodiment, the restraint material 1113 is formed from a steel material (welded four-sided box) formed by welding four iron plates of SS material or SN material (four-sided welded box). A pair of first restraining members 313a are arranged on both sides of the intermediate members 312a and 312b in the width direction (arrow UD direction), and a pair of first intermediate members 312b are arranged in the front-rear direction (arrow FB direction). and a pair of second restraining members 313b arranged outside the. Note that the restraining material 1113 is not limited to SS material or SN material, and may be formed from other general steel materials (for example, SM material or SUS material).

In the restraining material 1113, the first intermediate material 312b disposed at the farthest position from the first base material 311 and the other side (arrow R direction side) of the second restraining material 313b are joined by welding. . Therefore, in the sixth modification, the end of the restraining material 1113 connected to the bridge pier 1160 (structure) and the end of the first base material 311 connected to the bridge 1150 (structure) are located on one side. (the side in the direction of arrow L). This eliminates the need to connect the other side of the second restraining member 313b to the pier 1160 on the lower side of the pier 1160 in the gravity direction (arrow R direction side), so the energy absorbing device 1110 is installed between the bridge 1150 and the pier 1160. Easy to set up.

Note that in the energy absorbing device 1110 in the sixth modification, like the energy absorbing device 310 in the third embodiment, when an excessive force acts on the bridge 1150, the first intermediate members 312a and 312b are made plastic. By deforming, the energy of the axial force acting on the energy absorbing device 1110 can be absorbed. As a result, the vibration damping performance of the bridge 1150 can be improved.

In the third embodiment, a restraining member 313 is arranged on one side of the energy absorbing device 310 (the side in the direction of the arrow L), and an extension member 313 is arranged on the other side of the energy absorbing device 310 (the side in the direction of the arrow R). Although a case has been described in which each member 323 is connected to the connecting member 330 by welding, the present invention is not necessarily limited to this.

For example, as shown in FIG. 14, a restraining material 313 is disposed on one side of the energy absorbing device 1210 (in the direction of arrow L), and a restraining material 313 is disposed on the other side of the energy absorbing device 1210 (in the direction of arrow R). The extension member 323 may be connected with a bolt B and a nut N. Note that FIG. 14 is an exploded perspective side view of the energy absorbing device 1210 in the seventh modification.

As shown in FIG. 14, in the energy absorbing device 1210 in the seventh modification, a connecting member 1230 is welded to a restraining member 313 disposed on one side (arrow L direction side) of the energy absorbing device 1210. A second connecting member 1231 having the same shape as the connecting member 1230 is welded to an extending member 323 disposed on the other side (arrow R direction side) of the device 1210.

The connecting member 1230 and the second connecting member 1231 are iron plates for connecting the restraining member 313 and the extending member 323 with bolts T and nuts N, and are located at positions that do not overlap with the restraining member 313 and the extending member 323 in the left-right direction. A plurality of through holes for inserting bolts T are formed at predetermined intervals.

In the seventh modification, the restraint member 313 and the extension member 323 can be connected by the bolt T and nut N using the connecting member 1230 and the second connecting member 1231, so that the energy absorbing device 1210 can be connected to the structure 1 (see FIG. 1). Even after the energy absorbing device 1210 is installed, only one side (the side in the direction of arrow L) of the energy absorbing device 1210 can be removed from the structure 1.

Therefore, after the first intermediate material 312 is plastically deformed due to the axial force acting on the energy absorbing device 1210, one side of the energy absorbing device 1210 (in the direction of arrow L) can be removed without removing the entire energy absorbing device 1210 from the structure 1. side) can be replaced. As a result, the work of replacing the energy absorbing device 1210 can be simplified.

Furthermore, in the seventh modification, the restraint material 313 and the extension member 323 are formed to have substantially the same external shape in the left-right direction (arrow LR direction), so that force is applied from the restraint material 313 to the extension member 323. The bending moment applied to the connecting member 1230 and the second connecting member 1231 can be reduced when the force is transmitted or when the force is transmitted from the extending member 323 to the restraining member 313. As a result, manufacturing costs for the connecting member 1230 and the second connecting member 1231 can be reduced.

In the fifth embodiment, a case has been described in which one first intermediate material 512 is disposed on each side of the first base material 511 in the front-rear direction (arrow FB direction), but this is not necessarily the case. It is not limited to.

For example, as shown in FIG. 15, a plurality of first intermediate materials 512 (three in this modification) are arranged on each side of the first base material 511 in the front-rear direction (arrow FB direction). It may be something that you do. Note that FIG. 15(a) is a cross-sectional view of the energy absorbing device 1310 in the eighth modification, and corresponds to the cross section of the energy absorbing device 510 taken along the Xa-Xa line in FIG. 9(a), and FIG. ) is a cross-sectional view of the energy absorbing device 1310, which corresponds to the cross section of the energy absorbing device 510 taken along the line Xb-Xb in FIG. 9(a).

As shown in FIG. 15, the energy absorbing device 1310 in the eighth modification includes three first intermediate materials 512 on each side of the first base material 511 in the front-rear direction (arrow FB direction). will be placed.

Note that the eighth modification is different from the fifth embodiment only in the number of energy absorbing devices 510 and the first intermediate material 512, so in the following description, the same reference numerals as in the fifth embodiment will be used. I will explain.

Further, the first intermediate materials 512, which are arranged in three sheets in the front-rear direction (arrow FB direction) of the first base material 511, are similar to the first intermediate materials 12a to 12c in the first embodiment. , a first intermediate material 512 folded back in a bellows shape and arranged on the first base material 511 side is connected to the first base material 511, and a first intermediate material 512 is arranged on the restraining material 513 side. Intermediate material 512 is connected to restraining material 513.

Like the first intermediate material 512 in the fifth embodiment, the first intermediate material 512 is in a state where the side surface in the thickness direction is non-parallel to the side surface in the thickness direction of the first base material 511. It will be arranged in Further, the inclination of the first intermediate material 512 with respect to the first base material 511 is such that the first intermediate material 512 disposed on the side closer to the first base material 511 is inclined in opposite directions alternately. be done.

To explain in detail, the first intermediate material 512 arranged at a position adjacent to the first base material 511 in the front-rear direction (arrow FB direction) is arranged in the left-right direction (arrow LR direction) of the energy absorbing device 510. ) is arranged so as to be inclined away from the outside in the front-rear direction (direction of arrow FB) as it goes from the center side to the outside.

On the other hand, the first intermediate material 512 disposed at the second closest position to the first base material 511 in the front-rear direction (arrow-B direction) is arranged in the left-right direction (arrow LR direction) of the energy absorbing device 510. It is arranged so as to be inclined away from the outside in the front-rear direction (arrow FB direction) as it goes from the outside to the center.

Due to the inclination of these first intermediate materials 512, in the eighth modification, there is a gap between the first base materials 511, the first intermediate materials 512, and the restraining materials 513 that are adjacent in the front-back direction. A predetermined gap can be formed.

Therefore, when the first intermediate material 512 is deformed by an axial force pressing outward in the left-right direction (arrow LR direction) acting on the energy absorbing device 1310, the first base material 511 and Using the gaps formed between the first intermediate material 512 and the restraining material 513, two sheets (the first and third sheets stacked in the front-rear direction (direction of arrow F-B)) are One intermediate material 512 can be bent and deformed in the front-rear direction (arrow FB direction) at multiple positions in the left-right direction. Due to the deformation in which these two first intermediate members 512 are bent in the front-back direction, the energy absorbing device 1310 in the eighth modification can easily absorb the axial force acting outward in the left-right direction.

Furthermore, in the eighth modification, when the axial force pressing inward in the left-right direction (arrow LR direction) acts on the energy absorption device 1310 and the first intermediate member 512 is deformed, the first Utilizing the gaps formed between the intermediate materials 512 of It can be bent and deformed in the direction (arrow FB direction). Due to the deformation in which the single first intermediate member 512 is bent in the front-back direction, the energy absorbing device 1310 in the eighth modification can easily absorb the axial force that acts inward in the left-right direction.

Note that in the eighth modification, the number of first intermediate members 512 is increased compared to the energy absorbing device 510 in the fifth embodiment, so the axial force acting on the energy absorbing device 1310 is When being transmitted from the base material 511 to the restraining material 513 via the first intermediate material 512, the actual length of the first intermediate material 512 can be increased. As a result, the amount of energy absorbed by the deformation of the first intermediate material 512 can be increased.

Further, in the eighth modification, a predetermined space is formed between the first base material 511 and the first intermediate material 512 and the restraint material 513 in the vertical direction (arrow UD), and the space is A second regulating plate 519 is provided. Therefore, in the eighth modification, the second regulating plates 519 are disposed on both side surfaces of the first base material 511 in the vertical direction. Thereby, in the eighth modification, there is no need to divide the second regulating plate 519 into two pieces in the front-rear direction of the first base material 511 as in the fifth embodiment. As a result, in the eighth modification, the cost of manufacturing the energy absorbing device 1310 can be reduced.

In the first to sixth embodiments described above, the first intermediate material 12, 312, 412, 512 disposed on both sides of the first base material 11, 311, 511 in the front-rear direction (arrow FB direction) Although the case has been described in which the cross-sectional areas of the respective cross sections are the same, the invention is not necessarily limited to this.

For example, as shown in FIG. 16(a), by changing the dimensions in the width direction (arrow UD direction) of each of the plurality of first intermediate materials 1412a to 1412c, the plurality of first intermediate materials 1412a to 1412c are The cross-sectional area of each cross-section of 1412c may be changed. Note that FIG. 16(a) is a cross-sectional view of the energy absorbing device 1410 in the ninth modification, and corresponds to the cross-sectional view of the energy absorbing device 10 taken along the line IIIa-IIIa in FIG. 2(b).

The energy absorbing device 1410 in the ninth modification will be described below. Note that the same parts as in each embodiment and each modification example described above are given the same reference numerals, and the explanation thereof will be omitted.

As shown in FIG. 16(a), the energy absorbing device 1410 in the ninth modification is provided on the first base material 11 and on both sides of the first base material 11 in the vertical direction (direction of arrow UD). A plurality of first intermediate materials 1412 (three in the ninth modification) arranged in an overlapping manner, the first base materials 11, and corners arranged surrounding the first intermediate materials 1412. It is formed mainly of a cylindrical restraint member 13.

Note that the energy absorbing device 1410 in the ninth modification is formed in a laterally symmetrical shape similarly to the energy absorbing device 10 in the first embodiment, so in the following description, the left side (arrow L direction side) The first intermediate material 1412 disposed will be mainly described, and detailed description of the second intermediate material disposed on the right side (arrow R direction side) will be omitted.

The first intermediate member 1412 is formed from an iron plate made of low-yield point steel, and has its thickness direction oriented in the front-rear direction (arrow FB direction) and its width direction oriented in the up-down direction (arrow UD direction). It will be arranged in Further, the first intermediate material 1412 is arranged at a position overlapping the first base material 11 in the front-rear direction (arrow FB direction) in a portion excluding the connecting portion with the gusset plate 4 (see FIG. 1). Ru. In the following description, three first intermediate materials 1412 are arranged on each side of the first base material 11 in the front-rear direction (arrow FB direction) on the side closer to the first base material 11. The explanation will be given with reference numerals 1412a to 1412c sequentially starting from the first intermediate material 1412.

Here, in the energy absorbing device 1410 in the ninth modification, the thickness of the first intermediate members 1412a to 1412c is the same, and the width dimension in the vertical direction (arrow UD direction) is the same as that of the first intermediate member 1412a to 1412c. The width dimensions of the first intermediate materials 1412a to 1412c are sequentially reduced by a predetermined dimension starting from the first intermediate material 1412a disposed on the side closer to the base material 11. That is, the cross-sectional areas of the first intermediate materials 1412a to 1412c are reduced by a predetermined size in order from the first intermediate material 1412a disposed on the side closer to the first base material 11 (first intermediate material 1412a>first intermediate material 1412b>first intermediate material 1412c).

According to the energy absorbing device 1410 in the ninth modification, similarly to the energy absorbing device 310 in the third embodiment, the yield point is lower than that of the first base material 11 and the restraining material 13 in the stress-strain relationship. The first intermediate members 1412a to 1412c are formed from the material (low yield point steel). Therefore, when an excessive axial force acts on the energy absorbing device 1410, the first intermediate materials 1412a to 1412c are plastically deformed (reaching the yield point) before the first base material 11 and the restraining material 13. be able to. Therefore, when an excessive axial force acts on the energy absorbing device 1410, the first intermediate members 1412a to 1412c are plastically deformed to absorb the axial force acting on the energy absorbing device 1410, and the structure 1 (See Figure 1) can improve vibration damping performance.

Here, the stress acting on the first intermediate members 1412a to 1412c is expressed as "force (axial force)/cross-sectional area". As described above, in the energy absorbing device 1410 in the ninth modification, the cross sections of the first intermediate materials 1412a to 1412c are sequentially arranged from the first intermediate material 1412a disposed on the side closer to the first base material 11. The cross-sectional area is reduced by a predetermined amount. Therefore, when an axial force acts on the energy absorbing device 1410, the stress acting on the first intermediate members 1412a to 1412c can be increased more easily as the first intermediate member 1412c has a smaller cross-sectional area. Therefore, in the ninth modification, the first intermediate materials 1412a to 1412c can be plastically deformed in the order of first intermediate materials 1412c, 1412b, and 1412a by reaching the yield point.

Note that the plastic deformation of the first intermediate materials 1412a to 1412c is such that the first intermediate material 1412c is first plastically deformed and strain-hardened, so that the cross-sectional area of the first intermediate material 1412c is next to that of the first intermediate material 1412c. When the stress acting on the small first intermediate material 1412b reaches its yield point, the first intermediate material 1412b is plastically deformed. Next, as the first intermediate material 1412b is plastically deformed and strain hardened, the stress acting on the first intermediate material 1412a, which has a larger cross-sectional area than the first intermediate materials 1412b and 1412c, reaches its yield point. By reaching this point, the first intermediate member 1412a is plastically deformed.

Thus, in the ninth modification, the cross-sectional area of the first intermediate material 1412c among the first intermediate materials 1412a to 1412c is made smaller than that of the other first intermediate materials 1412a and 1412b. (In other words, the first intermediate member 1412c whose cross-sectional area is reduced is provided in a part connected in a bellows-like manner.) Therefore, at a timing when a relatively small axial force is acting on the energy absorbing device 1410, The first intermediate material 1412c, which has a smaller cross-sectional area than the first intermediate materials 1412a and 1412b, can be plastically deformed.

Therefore, all of the first intermediate materials 1412a to 1412c are formed with the cross-sectional area of the first intermediate material 1412a or the first intermediate material 1412b (that is, the first intermediate material in the third embodiment 312a to 312c (see FIG. 6) are formed by the cross-sectional area of the first intermediate member 1412a or the first intermediate member 1412b. The timing from when the first intermediate material 1412c starts to absorb energy (when the first intermediate material 1412c starts plastic deformation) can be accelerated. As a result, the vibration damping performance of the energy absorbing device 1410 can be improved.

Furthermore, in the ninth modification, the cross-sectional area of the first intermediate members 1412a to 1412c is changed stepwise to a predetermined size, so that it is possible to prevent the energy absorption effect of the energy absorption device 1410 from decreasing. It can be suppressed.

For example, when the cross-sectional area of the first intermediate material 1412b is formed to have the same size as the cross-sectional area of the first intermediate material 1412a, the cross-sectional area of the first intermediate material 1412c is The difference between the area and the cross-sectional area of the first intermediate material 1412a, 1412b becomes large. Therefore, the difference between the axial force that allows the first intermediate member 1412c to start plastic deformation and the axial force that allows the first intermediate members 1412a and 1412b to start plastic deformation becomes large.

Here, the first intermediate members 1412a to 1412c are strain-hardened by being plastically deformed, so as the axial force that acts on them increases and the strain-hardening progresses, the amount of plastic deformation decreases. Therefore, the energy absorption effect of each of the first intermediate materials 1412a to 1412c decreases as strain hardening progresses.

Therefore, as described above, when the difference between the axial force that allows the first intermediate member 1412c to start plastic deformation and the axial force that allows the first intermediate member 1412a, 1412b to start plastic deformation increases, the first After the intermediate material 1412c is plastically deformed, it becomes difficult to plastically deform the first intermediate materials 1412a and 1412b at a timing when the amount of plastic deformation decreases due to strain hardening. Therefore, after the first intermediate material 1412c is strain-hardened, the energy absorption effect of the energy absorption device 1410 may be reduced.

To explain in detail, assuming that a small axial force A acts on the energy absorption device 1410 through an axial force B to a large axial force C (axial force A<B<C), the cross section of the first intermediate material 1412c is If the cross-sectional area is formed to a size that can absorb the axial force A, and the cross-sectional area of the first intermediate member 1412a, 1412b is formed to a size that can absorb the axial force C, energy absorption is possible. When the axial force acting on the device 1410 becomes large enough to reach the axial force B, the first intermediate material 1412c becomes strain-hardened, making it difficult for the energy absorbing device 1410 to absorb the axial force B.

In addition, in order to absorb the axial force B, when the cross-sectional area of the first intermediate members 1412a and 1412b is formed to a size that can absorb the axial force B, the energy absorption device 1410 is affected. When the axial force increases to the axial force C, the first intermediate members 1412a and 1412b become strained and hardened, making it difficult for the energy absorption device 1410 to absorb the axial force C.

On the other hand, in the ninth modification, the cross-sectional area of the first intermediate materials 1412a to 1412c is changed stepwise by a predetermined size (that is, each of the first intermediate materials 1412a to 1412c is (the cross-sectional areas of the first intermediate members 1412a to 1412c are formed to have different sizes), so the cross-sectional area of each of the first intermediate members 1412a to 1412c is set to a size that can absorb the axial forces A, B, and C. Can be set to As a result, in the ninth modification, when an excessive axial force acts on the energy absorbing device 1410, at least one of the first intermediate members 1412a to 1412c is plastically deformed to act on the energy absorbing device 1410. It is possible to create a state in which the axial force can be absorbed. As a result, it is possible to suppress the energy absorption effect of the energy absorption device 1410 from decreasing.

Further, in the ninth modification, the first intermediate materials 1412a to 1412c are formed with different width dimensions in the vertical direction (arrow UD direction) (that is, the first intermediate materials 1412a to 1412c are formed with different width dimensions in the vertical direction (direction of arrow UD). By forming the plates to have different external dimensions, it is possible to form a portion with a reduced cross-sectional area in a part that is connected like a bellows, so the cross-sectional area of the cross-sectional area is reduced. When forming a portion, there is no need to change the cross-sectional area of the first intermediate material 1412 at an intermediate position in one sheet of the first intermediate material 1412. That is, it is not necessary to cut the first intermediate material 1412 formed (cut out) with predetermined plate thickness and width to have different cross-sectional areas. Therefore, manufacturing of the energy absorbing device 1410 can be simplified.

Furthermore, in the ninth modification, the thickness dimensions of the first intermediate members 1412a to 1412c in the front-rear direction (arrow FB direction) are the same, and the width dimensions in the up-down direction (arrow UD direction) are the same. are formed differently, so when forming the first intermediate materials 1412a to 1412c, the same plate member is simply cut to a width corresponding to the first intermediate materials 1412a to 1412c, respectively. Materials 1412a to 1412c can be formed. As a result, the first intermediate materials 1412a to 1412c can be manufactured easily.

In addition, in the ninth modification described above, a case has been described in which the first intermediate members 1412a to 1412c have different width dimensions and the cross-sectional areas of the first intermediate members 1412a to 1412c are different, but this is not necessarily the case. It is not limited to.

For example, as shown in FIG. 16(b), by changing the dimensions in the thickness direction (arrow FB direction) of each of the plurality of first intermediate materials 1512a to 1512c, the plurality of first intermediate materials 1512a to 1512c are The cross-sectional area of each cross-section of 1512c may be changed. Note that FIG. 16(b) is a cross-sectional view of the energy absorbing device 1510 in the tenth modification, and corresponds to the cross-sectional view of the energy absorbing device 10 taken along line IIIb-IIIb in FIG. 2(b).

The energy absorbing device 1510 in the tenth modification will be described below. Note that in the energy absorbing device 1510 in the tenth modified example, the first intermediate material 1412 of the energy absorbing device 1410 in the ninth modified example is the first intermediate material 1512 (on the right side in the left-right direction (arrow R direction side)). Since the second intermediate material to be disposed is only changed to the second intermediate material 1522), in the following description, explanations other than the first intermediate material 1512 and the second intermediate material 1522 will be omitted.

As shown in FIG. 16(b), in the energy absorbing device 1510 in the tenth modification, three first intermediate materials are placed on each side of the first base material 11 in the front-rear direction (arrow FB direction). 1512 is arranged. In the following description, reference numerals 1512a to 1512c are given sequentially from the first intermediate material 1512 disposed on the side closer to the first base material 11.

Here, in the energy absorbing device 1510 in the tenth modification, the first intermediate materials 1512a to 1512c have the same width dimension in the vertical direction (arrow UD direction), while the first base material 11 The plate thicknesses of the first intermediate members 1512a to 1512c are sequentially reduced by a predetermined dimension starting from the first intermediate member 1512a disposed on the side closer to the first intermediate member 1512a. That is, the cross-sectional areas of the first intermediate materials 1412a to 1412c are reduced by a predetermined size in order from the first intermediate material 1412a disposed on the side closer to the first base material 11 (first intermediate material 1412a>first intermediate material 1412b>first intermediate material 1412c).

As a result, in the energy absorbing device 1510 in the tenth modified example, similarly to the energy absorbing device 1410 in the ninth modified example, when an axial force acts on the energy absorbing device 1510, the first intermediate members 1512a to 1512c The stress acting on the first intermediate material 1512c can be increased in order from the first intermediate material 1512c having a small cross-sectional area.

Note that the effect of changing the cross-sectional area of the first intermediate materials 1512a to 1512c stepwise to a predetermined size is the same as that of the energy absorbing device 1410 in the ninth modification, so the details will be explained below. Explanation will be omitted.

Furthermore, in the tenth modification, the width dimensions in the vertical direction (arrow UD direction) of the first intermediate materials 1512a to 1512c are set to be the same, so that the first intermediate materials 1512a to 1512c are It is possible to ensure the respective welding distances of the welds (welding marks Y) that connect the materials 1512a to 1512c and the restraint material 13. As a result, when an axial force acts on the energy absorbing device 1510, the joints (folded portions) formed by each weld (welding mark Y) can be prevented from breaking.

Furthermore, in the tenth modification, the width dimensions in the vertical direction (arrow UD direction) of the first intermediate materials 1512a to 1512c are set to be the same, so that the first intermediate materials 1512a in the vertical direction It is possible to suppress the formation of a space between ~1512c and the restraining material 13. As a result, the first intermediate materials 1512a to 1512c may buckle in the width direction, or the joints (folded portions) of the first intermediate materials 1512a to 1512c due to welding (welding marks Y) may bend in the width direction. Misalignment of the arrangement of the materials 1512a to 1512c in the width direction can be suppressed.

Therefore, the first intermediate materials 1512a to 1512c may buckle in the width direction, or the joints (folded portions) of the first intermediate materials 1512a to 1512c due to welding (welding marks Y) may bend in the width direction. There is no need to separately provide a member on the restraining member 13 or the first intermediate members 1512a to 1512c to prevent the arrangement of the members 1512a to 1512c from shifting in the width direction. As a result, it is possible to suppress an increase in the manufacturing cost of the energy absorbing device 1510.

Furthermore, in the tenth modification, as described above, it is possible to suppress the formation of spaces between the first intermediate materials 1512a to 1512c and the restraining material 13 in the vertical direction (arrow UD direction). , it is possible to suppress the formation of unnecessary spaces inside the restraint material 13. As a result, the energy absorbing device 1510 can be downsized.

In addition, in the ninth modification example and the tenth modification example, the first intermediate material 12 and the second intermediate material 22 of the energy absorption device 10 in the first embodiment are replaced with the first intermediate material 1412, 1512 and the Although the case where the first intermediate material 312, 412, 512 and the second intermediate material 422 in other embodiments and modifications are replaced with the second intermediate material 1522 in the ninth modification and the tenth modification has been described. Like the energy absorbing devices 1410 and 1510 in the modified example, it may be replaced with first intermediate members 1412 and 1512 and second intermediate member 1522 having different cross-sectional areas.

Furthermore, in the ninth modification and the tenth modification, the first intermediate material 1412, 1512 is formed from low yield point steel, but the first base material 11 and the second base material It is also possible to form it from other general steel materials as long as it is formed from a material with a lower yield point than the material 21 (reaches its yield point first). Furthermore, the material of the first intermediate materials 1412 and 1512 may be the same as the materials of the first base material 11 and the restraining material 13.

Note that when the first intermediate materials 1412, 1512 are formed from the same material as the first base material 11 and the restraining material 13, the cross-sectional area of the first intermediate materials 1412, 1512 is the same as the first intermediate material 1412, 1512. The cross section of the first intermediate material 1412, 1512 is smaller than the cross section of the base material 11 and the restraining material 13, and when an axial force acts on the energy absorbing device 1410, 1510, the first intermediate material 1412, 1512 It is configured to undergo plastic deformation earlier than 13.

In the ninth modification and the tenth modification, the first intermediate materials 1412a and 1512a having a large cross-sectional area are arranged at the position closest to the first base material 11, and Although the case where the first intermediate members 1412b, 1412c, 1512b, and 1512c whose cross-sectional area becomes smaller as the distance from good.

In the ninth modification or the tenth modification, the width dimension in the vertical direction (direction of arrow UD) of the first intermediate materials 1412a to 1412c or the longitudinal direction ( The case where the plate thickness dimensions in the direction of arrow FB) are made different has been described, but when both the width dimension and the plate thickness dimension are made different, the respective cross sections of the first intermediate materials 1412a to 1412c and 1512a to 1512c are The surfaces may have different cross-sectional areas.

In the ninth modification or the tenth modification, the cross-sectional area of each of the first intermediate materials 1412a to 1412c and 1512a to 1512c is changed to a predetermined size. However, the cross-sectional area of at least one of the first intermediate materials 1412a to 1412c and 1512a to 1512c is not limited to that of the other first intermediate material 1412. , 1512 may be formed to be smaller than the cross-sectional area of the cross-sections.

Note that even if the cross-sectional area of at least one cross section is formed small, the cross-sectional area of the first intermediate materials 1412 and 1512 is Since the first intermediate members 1412, 1512 formed with a small cross-sectional area can be plastically deformed at an earlier timing than the first intermediate members 1412, 1512 formed with a large cross-sectional area, the energy absorption devices 1410, 1510 Vibration damping performance can be improved.

In the ninth modification and the tenth modification, the first intermediate materials 1412a to 1412c and 1512a to 1512c stacked on both sides of the first base material 11 in the front-rear direction (arrow FB direction) are traversed in different ways. Although a case has been described in which the formation is performed using a cross-sectional area of a plane, the invention is not necessarily limited to this.

For example, among the first intermediate members 1412a to 1412c, 1512a to 1512c, which are connected in a bellows shape, a midway position (for example, in the left-right direction of the first intermediate members 1412a to 1412c, 1512a to 1512c) The cross-sectional area of the cross section may be changed at an intermediate position (direction of arrow LR). Further, the cross-sectional area of the first intermediate material 1412, 1512 may be changed every predetermined number of sheets (for example, every two sheets).

In the ninth modification and the tenth modification, three first intermediate materials 1412 and 1512 are arranged on each side of the first base material 11 in the front-rear direction (arrow FB direction). Although the case has been described, the number is not necessarily limited to three, and the number may be one or a plurality of sheets other than three. In addition, when the first intermediate materials 1412 and 1512 are disposed on both sides of the first base material 11 in the front-rear direction (arrow FB direction), the first intermediate materials 1412 and 1512 are The cross-sectional area of the members 1412 and 1512 may be changed at a midway position in the extending direction (left-right direction (arrow LR direction)).

In the first embodiment, the energy absorbing device 10 is made of the first base material 11 (second base material 21), the first intermediate material 12 (second intermediate material 22), and the restraining material 13. Although the case where the reinforcing plate 218 and the first suppressing member 215 are arranged at both ends of the restraining member 13 is explained, it is not necessarily limited to this. It may be something that

In the first to fifth embodiments described above, the front-rear direction (arrow FB direction) in which the first base material 11, 311, 511 and the first intermediate material 12, 312, 412, 512 overlap is the pair of pillars 2 Although a case has been described where the arrangement is perpendicular to the rectangular plane surrounded by the pair of beams 3, the first base material 11, 311, 511 and the first intermediate The energy absorbing devices 10, 210, 310, 410, 510 are arranged so that the front and back direction where the materials 12, 312, 412, 512 overlap are parallel to a rectangular plane surrounded by a pair of columns 2 and a pair of beams 3. Also good.

In the first to fifth embodiments described above, the case where the energy absorption devices 10, 210, 310, 410, 510 are arranged in the building structure 1 has been described, but the energy absorption devices 10, 210, 310, 410, 510 may be used for things other than buildings. For example, the energy absorbing device 10, 210, 310, 410, 510 may be used in the structure 1 when manufacturing a bridge or a ship hull.

In the first to fourth embodiments described above, the first base materials 11, 311, the first intermediate materials 12, 312, 412, and the Although the case where the second restraining materials 13b and 313b are arranged in contact with each other has been described, the first base material 11, 311, the first intermediate material 12, 312, 412, and the second restraining material 13b, 313b are arranged with a predetermined gap in the front-rear direction, and the first base material 11, 311, the first intermediate material 12, 312, 412, the second restraining material 13b, 313b may be non-contacting. Further, the first intermediate materials 12, 312, 412 are arranged obliquely in the front-rear direction, and the first base materials 11, 311, the first intermediate materials 12, 312, 412, the second restraining materials 13b, 313b may be partially in non-contact with each other.

Note that the first base material 11, 311, the first intermediate material 12, 312, 412, and the second restraint material 13b, 313b are arranged with a predetermined gap in the front-back direction. In this case, a gap is formed in the welded portion of the first base material 11, 311, the first intermediate material 12, 312, 412, and the second restraint material 13b, 313b, so that the first base material A connecting member for connecting the materials 11, 311, the first intermediate materials 12, 312, 412, and the second restraining materials 13b, 313b may be separately provided and welded.

In the first and second embodiments described above, the case where the widths of the first base material 11 and the first intermediate material 12 are set to be the same has been described. 12 may be set to a different width.

Note that even in this case, it is preferable that the first base material 11 and the two first intermediate materials 12 have the same cross-sectional area. When an axial force acts on the energy absorbing device 10, 210, the axial force can be evenly distributed to each of the first base material 11, the two first intermediate materials 12, and the restraining material 13. This is because it is possible to easily calculate the amount of expansion and contraction of the energy absorbing device 10, 210 with respect to the axial force.

In the first and second embodiments described above, the first base material 11 and Although a case has been described in which the first intermediate material 12, the second base material 21, and the second intermediate material 22 are formed in laterally symmetrical shapes, the present invention is not necessarily limited to this.

For example, in the cross section of the energy absorbing device 10, 210, the first base material 11, the second base material 21, the two first intermediate materials 12, and the two second intermediate materials 22. , and the restraining material 13, the dimensions in the left-right direction (arrow LR direction) of the first base material 11 and the first intermediate material 12 are the same as those of the second base material 21 and the first intermediate material 12. It may be formed shorter or longer than the dimension in the left-right direction of the second intermediate material 22 (that is, asymmetrically in the left-right direction).

In the first and second embodiments, the cross-sectional areas of the first base material 11, the two (pair) of first intermediate materials 12a to 12c, and the restraining material 13 are set to be approximately the same. However, the first base material 11, the two (pair of) first intermediate materials 12a to 12c, and the restraint material 13 may be formed with different cross-sectional areas.

In particular, in the first and second embodiments described above, the energy absorbing devices 10 and 210 are manufactured using ready-made iron plates. Therefore, for example, when the cross-sectional area (thickness) of the first base material 11 is set to a desired value, the cross-sectional area (thickness) of the first base material 11 is exactly 1/2. There may be cases where there is no ready-made product that can provide the cross-sectional area (plate thickness).

In this case, a steel plate with a thickness that is thicker than an iron plate whose cross-sectional area is exactly 1/2 is cut, and a cross-sectional area (plate Although it is possible to form the first intermediate material 12 having a thickness of 1.5 mm, the process of cutting the iron plate is required, which increases the manufacturing cost.

Therefore, in this case, a ready-made iron plate with a cross-sectional area (thickness) close to 1/2 of the cross-sectional area (thickness) of the first base material 11 is used. , the energy absorbing device 10,210 may be formed.

In the first and second embodiments described above, a case has been described in which the distance between the pair of first restraining members 13a facing each other is larger than the distance between the facing pairs of second restraining members 13b. It is not necessarily limited to this.

For example, the distance between the pair of first restraining members 13a facing each other may be smaller than the distance between the facing pairs of second restraining members 13b.

Furthermore, in the first and second embodiments described above, the case where the width dimension of the second restraint material 13b is set larger than the distance between the opposing pair of first restraint materials 13a has been described. Even if the width dimension of the first restraining material 13a is set larger than the distance between the opposing second restraining materials 13b, the distance between the opposing first restraining materials 13a and the second restraining material The width dimensions of 13b may be set to be the same.

Furthermore, in the first and second embodiments described above, the case is explained in which the restraint material 13 is used, which is made by welding four plates into a rectangular shape: a pair of first restraint materials 13a and a pair of second restraint materials 13b. However, the present invention is not necessarily limited to this, and a restraining member 13 (for example, a ready-made square steel pipe) formed by bending a single plate into a square shape and joining both ends by welding may be used.

In the first and second embodiments described above, each of the first base material 11, the second base material 21, the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c, and the restraining material 13 is Although the case where the cross-sectional areas of the cross sections are the same has been described, it is not necessarily limited to this, and as in the energy absorbing device 310 in the third embodiment, the first iron plate 311a of the first base material 311 The first intermediate members 312a to 312c and the second restraining member 313b of the restraining member 313 may have the same cross-sectional area.

In this case, since the plate thickness of the second restraining material 313b can be secured, it is easy to secure a welding area when welding the first intermediate material 12c and the second intermediate material 22c to the second restraining material 313b. can. As a result, it is possible to suppress the joints between the first intermediate material 12c and the second intermediate material 22c and the second restraining material 13b from breaking.

In the third embodiment, the extension member 323 is formed from a square steel material and is connected to the restraining member 313 via the connection member 330 while being hollow inside. Materials such as concrete or mortar may be injected into the material. By pouring concrete or mortar into the extending member 323 and hardening it, buckling of the extending member 323 can be suppressed. Therefore, the cross-sectional area of the extending member 323 can be reduced.

In the third embodiment, the first intermediate members 312a to 312c are made of low yield point steel, but the invention is not limited to this, and the first intermediate members 312a to 312c are Any material may be used as long as it is plastically deformed (reaches the yield point) before the base material 311 and restraint material 313.

For example, the first base material 311, the first intermediate materials 312a to 312c, and the restraint material 313 are made of the same material (for example, any of general steel materials such as SS material, SN material, SM material, and yield point steel material). In addition, the cross-sectional area of the first intermediate members 312a to 312c is smaller than that of the first base material 311 and the restraining material 313, so that when an axial force acts on the energy absorbing device 310, the first By making the stress applied to the intermediate materials 312a to 312c higher than the stress applied to the first base material 311 and the restraining material 313, the first intermediate materials 312a to 312c are connected to the first base material 311 and the restraining material. Plastic deformation (reaching the yield point) may be performed before 313.

In the first and second embodiments described above, the first intermediate member 12 and the second intermediate member 22 are connected in a bellows shape on both sides of the energy absorbing device 10, 210 in the left-right direction (arrow LR direction). Although a case has been described in which the first intermediate member 12 is bellows only on one side in the left-right direction (arrow LR direction), the first intermediate member 12 is bellows-like, as in the energy absorbing device 310 in the third embodiment. They may be connected in a shape.

Further, in the first and second embodiments described above, the first base material 11 and the second base material 21, the first intermediate material 12 and the second intermediate material 22, and the restraining material 13 are made of the same material. Although a case has been described in which the first intermediate material 12 and the second intermediate material 22 are formed from a low yield point steel material, the first intermediate material 12 and the second intermediate material 22 are formed from a low yield point steel material, and the first intermediate material 11 and the second intermediate material are formed from a low yield point steel material. The base material 2 and the restraining material 13 are made of general steel material having a higher yield point than the low yield point steel material (for example, SS material, SN material, SM material), and the energy absorbing device 310 in the third embodiment is As such, the vibration damping properties of the structure 1 may be improved by plastically deforming the first intermediate member 12 and the second intermediate member 22.

In the third embodiment, a case has been described in which the first intermediate member 312 is connected in a bellows shape only on one side in the left-right direction (arrow LR direction), but the first intermediate member 312 is not necessarily limited to this. And like the energy absorbing devices 10 and 210 in the second embodiment, the first intermediate material 12 and the second intermediate material 22 are connected in a bellows shape on both sides in the left-right direction (arrow LR direction). It may be configured as follows.

Further, in the third embodiment, the first base material 311 and the restraining material 313 are formed from an SS material or an SN material, and the first intermediate material 312 is formed from a low yield point steel material. However, the first base material 311, the first intermediate material 312, and the restraint material 313 are formed from the same material, and like the energy absorption devices 10 and 210 in the first and second embodiments, The earthquake resistance of the structure 1 may be improved by improving the strength of the energy absorbing device 310.

In the third embodiment, a case has been described in which the second suppressing member 314 surrounding the restraining member 313 and the first suppressing member 315 are disposed at the left end of the restraining member 313 are provided. The second restraining member 313b is not limited to this, but if the second restraining member 313b has a strength that does not bend against the force that causes each joint to spread in the front-rear direction due to the axial force acting on the energy absorbing device 310, the second restraining member 313b 314 and the first suppressing member 315 may be omitted.

In the first and second embodiments described above, the case where the first base material 11 and the second base material 21 are formed from one iron plate has been described, but it is not necessarily limited to this. Like the energy absorbing device 310 in the embodiment and the energy absorbing device 910 in the fourth modification, it may be formed from a steel material (welded H-shaped steel or welded four-sided box) obtained by welding a plurality of iron plates.

In the first to third embodiments described above, the first intermediate materials 12a to 12c, 312a to 312c and the second intermediate materials 22a to 22c, which are formed from one type of material, are connected to the first base material 11, 311 or Although a case has been described in which the material is disposed on the second base material 21, it is not necessarily limited to this, and the energy absorption When an axial force acts on the device 10, 210, 310, it may be formed to have an intermediate material (region) that is easily deformed and an intermediate material (region) that is difficult to deform.

In the first to third embodiments described above, a case has been described in which the first restraint members 13a, 313a and the second restraint members 13b, 313b of the restraint members 13, 313 are formed from the same material, but this is not necessarily the case. The present invention is not limited to this, and the first restraint members 13a, 313a and the second restraint members 13b, 313b may be formed from different materials.

For example, the second restraint members 13b, 313b are susceptible to bending force from the first intermediate member 12, 312 and the second intermediate member 22, 322 due to the axial force acting on the energy absorbing device 10, 210, 310. The first restraining member 13a, 313a may be made of a metal material that is less deformable (higher strength).

In the first and second embodiments, the first intermediate materials 12a to 12c and the second intermediate materials 22a to 22c are stacked at the same position in the left-right direction (arrow LR direction), but The arrangement is not necessarily limited to this, but may be arranged in a stepped manner in the left-right direction, as in the fifth modification.

In the third embodiment, a case has been described in which the welding (welding trace Y) for connecting the first intermediate members 312a to 312c in a bellows shape is formed long in the left-right direction (arrow LR direction). The invention is not necessarily limited to this, and like the energy absorbing device 10 in the first embodiment, openings formed in the first intermediate members 312a to 312c (in the first embodiment, the first intermediate members 12a to 12c) may be used. The welding distance may be the same as the previous welding distance.

In the third embodiment, a case has been described in which the suppressing plate 317 and the ribs 316 are provided on the first base material 311, but the present invention is not limited to this, and an axial force acts on the energy absorbing device 310. In this case, if the first iron plate 311a is set to a thickness that does not bend in the front-rear direction (arrow FB direction), one or both of the restraining plate 317 and the ribs 316 can be attached to the first base material. The energy absorbing device 310 may be configured without being disposed in the energy absorbing device 311.

In the fifth embodiment, the first intermediate material 512 is formed of the same material as the first base material 511, but is not necessarily limited to this, and is made of a material different from the first base material 511. The first intermediate material 512 may be formed in the following manner.

In the fifth embodiment, the cross-sectional area of the first base material 511, the cross-sectional area of the two first intermediate materials 512, and the cross-sectional area of the restraining material 513 are as follows: Although a case has been described in which the first base material 511 and the two first intermediate materials 512 are formed to have the same cross-sectional area, the restraining material 513 The cross-sectional area in the cross-section may be set larger than the cross-sectional area in the cross-section of the first base material 511 and the two first intermediate materials.

In the fifth embodiment, a case has been described in which the reinforcing plate 511c and the second regulating plate 519 are provided on the first base material 511. If the axial force is small and the first base material 511 does not bend even if the reinforcing plate 511c and the second regulating plate 519 are not provided, the reinforcing plate 511c and the second regulating plate 519 are attached to the first base material. 511 may be provided.

Further, regardless of the magnitude of the axial force acting on the energy absorbing device 510, the reinforcing plate 511c and the second regulating plate 519 may not be provided on the first base member 511.

Note that when the reinforcing plate 511c is not provided, it is preferable to make the gap between the insertion hole 315a of the first suppressing member 315 and the first base material 511 as small as possible. As a result, when the first base material 511 is about to bend in the buckling direction, the first base material 511 is brought into contact with the first suppressing member 315, and the first base material 511 is prevented from buckling. It can be suppressed.

When the second regulating plate 519 is not provided, it is preferable to make the gap between the first intermediate material 512 and the restraining material 513 in the vertical direction (arrow UD direction) as small as possible. For example, in the fifth embodiment (see FIG. 10), the width of the first intermediate material 512 in the vertical direction is set to be the same as the width of the first base material 511 in the vertical direction. As a result, when the first intermediate material 512 tries to bend in the vertical direction, the first intermediate material 512 is brought into contact with the inner surface of the restraining material 513, and the first intermediate material 512 is bent in the vertical direction. can be suppressed.

In the fifth embodiment, a case has been described in which the second reinforcing plate 513c is disposed on one side (the side in the direction of arrow L) of the restraining member 513, but the present invention is not limited to this, and the energy absorbing device 510 is If the acting axial force is small and the restraining member 513 does not bend even if the second reinforcing plate 513c is not provided, the second reinforcing plate 513c may not be provided on the restraining member 513.

In the fifth embodiment, a case has been described in which the second reinforcing plate 513c is formed in a plate shape along the outer surface of the restraining member 513, but the invention is not limited to this. For example, the second reinforcing plate 513c The second reinforcing plate 513c may be made difficult to bend in the front-back direction by partially deforming it in the front-back direction. In this case, the restraint material 513 can be prevented from being bent by the force transmitted from the first intermediate material 512 to the restraint material 513 without increasing the thickness of the second reinforcing plate 513c.

1 Structure 10, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110, 1210, 1310, 1410, 1510 Energy absorption device 11, 311, 511, 911 First base material (base material )
311a First iron plate (opposing plate)
311b, 911b Second iron plate (connecting member)
519 Second regulation plate (contact member)
12,312,412,512,1412,1512 First intermediate material (intermediate material)
13,513,1113 Restraint material 314 Second restraint member (restraint material)
315 First restraining member (restraint material)
323 Extension member (other side member)
616,716 Reinforcement material (restraint material)
817 Second reinforcing material (restraint material)
21 Second base material (base material)
22,1522 Second intermediate material (intermediate material)
1150 Bridge (part of the structure)
1160 Pier (part of the structure)
U-D direction Width direction F-B direction Plate thickness direction, thickness direction L-R direction Longitudinal direction K2 Space (predetermined space)

Claims (15)

In an energy absorption device installed between two points on a structure,
a base member formed from a plurality of plates or a single plate, the longitudinal end of which is connected to one of the two points of the structure;
a plurality of plate-shaped intermediate materials arranged in the same number on both sides of the base material in the thickness direction;
a restraining material formed into a rectangular tube shape, disposed surrounding the base material and the intermediate material, and directly or indirectly connected to the other of the two points of the structure;
The intermediate material is arranged with the plate thickness direction facing the thickness direction of the base material,
The intermediate material adjacent to the base material in the thickness direction of the base material is disposed with the entire surface of the base material side in contact with the base material,
The intermediate material adjacent to the restraining material in the thickness direction of the base material is arranged with the entire surface of the restraining material side in contact with the restraining material,
When a plurality of the intermediate materials are disposed on one side of the base material in the thickness direction, the entire area of the opposing surface of the side where the adjacent intermediate materials face each other in the thickness direction of the base material is arranged in contact with each other,
An energy absorption device characterized in that the base material, the intermediate material, and the restraint material are connected in a bellows shape. In an energy absorption device installed between two points on a structure,
a base member formed from a plurality of plates or a single plate, the longitudinal end of which is connected to one of the two points of the structure;
a plurality of plate-shaped intermediate materials arranged in the same number on both sides of the base material in the thickness direction;
a restraining material formed into a rectangular tube shape, disposed surrounding the base material and the intermediate material, and directly or indirectly connected to the other of the two points of the structure;
The base material, the intermediate material, and the restraining material are connected in a bellows shape,
The base material, the intermediate material, and the restraining material are the base material, the intermediate material, or the restraining material in which regions other than the folded portion that are connected in a bellows shape and are folded back are adjacent to each other in the thickness direction of the base material. An energy absorption device characterized in that it is arranged with a predetermined gap between the two . The energy absorbing device according to claim 1 or 2, wherein the base material and the intermediate material are disposed in a state in which they are in contact with the restraining material, respectively, in the width direction. comprising at least one contact member disposed on each of both sides of the base material in the thickness direction,
The energy absorbing device according to any one of claims 1 to 3, wherein the abutting member abuts the restraining material when the base material deforms in its thickness direction. 5. A predetermined space according to claim 1, wherein a predetermined space is formed outside the base material and the intermediate material on a side opposite to a connecting side of the base material and the structure in the longitudinal direction of the base material. The energy absorption device according to any one of the above. According to any one of claims 1 to 5 , the base material is composed of a pair of opposing plates disposed on both sides in the thickness direction, and a connecting member that connects the pair of opposing plates to each other. Energy absorbing device as described. The base material, the intermediate material, and the restraining material are such that when a force is transmitted to the energy absorbing device from between two points of the structure, the intermediate material reaches its yield point at least before the restraining material. 7. Energy absorption device according to any one of claims 1 to 6 , characterized in that it is configured to reach. The energy absorbing device according to claim 7 , wherein the restraint member is formed from a square steel pipe. 9. The energy absorbing device according to claim 1, wherein the cross-sectional areas of the respective intermediate materials are set to be substantially the same. The energy absorption device according to any one of claims 1 to 9 , wherein the base material, the two intermediate materials, and the restraining material have substantially the same cross-sectional area. . The energy absorbing device according to claim 7 or 8 , wherein the intermediate member includes a portion having a reduced cross-sectional area in a portion connected in the bellows shape. A plurality of the intermediate materials disposed on one side in the thickness direction of the base material are formed such that at least one of the intermediate materials has a smaller thickness or width than the other intermediate materials,
A plurality of the intermediate materials disposed on the other side in the thickness direction of the base material are formed in a size corresponding to the intermediate materials disposed on the one side. Energy absorbing device as described. The energy storage device according to claim 1 or 2, wherein each of the plurality of intermediate materials arranged on one side in the thickness direction of the base material is formed to have a different size at least in plate thickness dimension or width dimension. Absorption device. comprising a second side member connected to the other of the two points of the structure,
The energy absorbing device according to any one of claims 1 to 13 , wherein the other side of the restraining material is removably connected to the other side member. A structure comprising the energy absorbing device according to any one of claims 1 to 14 .

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