JP4186441B2 - Vibration energy absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration energy absorbing device that absorbs vibration energy transmitted to a building by natural phenomena such as earthquakes and winds or artificial crustal deformation.
[0002]
[Problems to be solved by the invention]
As this type of vibration energy absorbing device, the one described in Japanese Patent Publication No. 58-30470 is known. The energy absorbing device described here includes a cylinder containing lead, When the rod moves relative to the cylinder, lead flows plastically through an annular passage defined by the rod enormous part and the inner peripheral surface of the cylinder. At this time, the cylinder internal pressure determined by the size of the annular passage acts on the closed end surface of the cylinder and appears as a resistance to the relative movement of the rod with respect to the cylinder. To absorb energy.
[0003]
This type of vibration energy absorbing device includes a spiral copper alloy ring wound about 5 to 6 times so that lead does not leak from the gap between the cylinder and the rod as the cylinder internal pressure increases. The ring is designed to receive and block lead that is about to be pushed into the gap by its spring force, thereby preventing lead leakage.
[0004]
The sealing device consisting of a spiral ring only receives the lead that is about to be pushed out into the gap by its spring force, and the pressing force on the outer peripheral surface of the rod is extremely small. It is difficult to prevent leakage from the lead gap that is dragged and spread by the lead, so there is a risk that lead will gradually leak out of the cylinder, lead pressure will decrease with long-term use, and energy absorption characteristics will deteriorate. It may end up.
[0005]
A sealing means that can preferably solve the above problems is proposed in Japanese Patent Application Laid-Open No. 2000-329182. In such a proposed sealing means, the sealing performance is determined in relation to the lead pressure. The sealing means must be selected and designed according to the lead pressure, which requires complicated work.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to easily obtain an optimum sealing performance regardless of the lead pressure. Vibration energy that can effectively prevent the lead spreading on the peripheral surface from leaking out of the cylinder, prevent the lead pressure in the cylinder from decreasing for long-term use, and eliminate the deterioration of energy absorption characteristics It is to provide an absorption device.
[0007]
[Means for Solving the Problems]
The vibration energy absorbing device according to the first aspect of the present invention includes a cylinder, a closing member that closes both ends of the cylinder in the axial direction, a rod that passes through the closing member, lead contained in the cylinder, A resistance generating portion that is provided in the cylinder and generates a resistance force against the cylinder relative to the cylinder in the axial direction relative to the cylinder in relation to lead; A seal member having an annular seal surface that is slidably in contact with the surface of the one member, and a seal surface on the surface of the one member. Adjusting means for variably adjusting the pressing force.
[0008]
According to the vibration energy absorbing device of the first aspect, there is provided adjusting means for variably adjusting the pressing force of the sealing surface to the surface of one of the rods and cylinders that moves in the axial direction relative to the closing member. Therefore, it is possible to easily obtain the optimum sealing performance regardless of the lead pressure, so that the lead spreading on the outer peripheral surface of the rod or the inner peripheral surface of the cylinder leaks out of the cylinder. It is possible to effectively prevent the deterioration of the lead pressure in the cylinder during long-term use, and to eliminate the deterioration of the energy absorption characteristics.
[0009]
According to the vibration energy absorbing device of the second aspect of the present invention, in the vibration energy absorbing device of the first aspect, the closing member forms a wedge-shaped space forming surface that forms an annular wedge-shaped space in cooperation with the surface of one member. The seal member has a shape complementary to the wedge-shaped space forming surface and has a contact surface that is in contact with the wedge-shaped space forming surface and is inclined with respect to the axial direction. An axial force is applied to the member to press the contact surface of the sealing member against the wedge-shaped space forming surface of the closing member.
[0010]
According to the vibration energy absorbing device of the second aspect, since the contact surface of the sealing member is pressed against the wedge-shaped space forming surface of the closing member, the pressing surface seals the surface of one member. Therefore, the pressing force of the sealing surface to the surface of one member can be adjusted with certainty.
[0011]
In the vibration energy absorbing device according to the third aspect of the present invention, in the vibration energy absorbing device according to the first or second aspect, the seal member includes an annular recess on the seal surface.
[0012]
According to the vibration energy absorbing device of the third aspect, the deformability of the seal member is increased by the recess, and the seal surface can be brought into close contact with the surface of one of the members. Since a lubricant such as grease can be stored, one member and the seal member can be slid relatively smoothly without resistance.
[0013]
In the vibration energy absorbing device according to the fourth aspect of the present invention, in the vibration energy absorbing device according to any one of the first to third aspects, the adjusting means is a movable member that is movable in the axial direction with respect to the closing member; A screw member that is screwed to the movable member and that moves the movable member in the axial direction by rotation. The movable member engages with the seal member so as to transmit the movement to the seal member. Yes.
[0014]
According to the vibration energy absorbing device of the sixth aspect, the pressing force of the sealing surface to the surface of one member can be variably adjusted by rotating the screw member and moving the movable member in the axial direction. it can.
[0015]
In the vibration energy absorbing device according to the fifth aspect of the present invention, in the vibration energy absorbing device according to the fourth aspect, the movable member is engaged with the seal member via the engagement surface, and the engagement surface is in the axial direction. It is inclined with respect to.
[0016]
According to the vibration energy absorbing device of the fifth aspect, since the engagement surface is inclined with respect to the axial direction, the seal member faces the surface of one member in the movement of the movable member by the rotation of the screw member. Therefore, inconveniences such as buckling of the seal member can be avoided.
[0017]
The vibration energy absorbing device according to the sixth aspect of the present invention is the vibration energy absorbing device according to any one of the first to fifth aspects, wherein the space is removed so that no space is created around the lead accommodated in the cylinder. Means are further provided.
[0018]
According to the vibration energy absorbing device of the sixth aspect, even if a space occurs around the lead after adjusting the pressing force of the sealing surface to the surface of one member by the adjusting means, this space is removed by the space removing means. In order to be able to do so, the lead can be tightly accommodated in the cylinder, so that energy absorption based on the plastic flow of lead can be achieved as desired.
[0019]
In the vibration energy absorbing device of the present invention, the cylinder may be connected to the fixed side, the rod may be connected to the vibration side, or conversely, the cylinder may be connected to the vibration side, and the rod may be connected to the fixed side. The cylinder is connected to the fixed side and the rod is connected to the vibration side.
[0020]
In the present invention, as the resistance generating portion, a bulging portion or a recess provided in the cylinder or the rod can be cited as a preferable example, but the bulging portion and the recess may be annular or It may be circular or rectangular, and when a plurality of them are provided, they may be regularly or randomly arranged with a fixed interval.
[0021]
As a material for forming the seal member, a material having lubricity is preferable, and examples thereof include iron-based materials, general leaf spring materials, high-tensile brass or phosphor bronze.
[0022]
Furthermore, in the present invention, the closing member may be fixed to the other member of the rod and cylinder that does not move in the axial direction with respect to the closing member via a screw or the like. At least one may be formed integrally with the other member.
[0023]
Next, embodiments of the present invention will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4, the vibration energy absorbing device 1 of the present example includes a cylindrical cylinder 2 formed of an iron-based material, closing members 3 and 4 that close both ends of the cylinder 2 in the axial direction A, A rod 5 made of, for example, high-strength steel that penetrates the closing members 3 and 4, lead 6 that is closely accommodated in the cylinder 2, and an axial direction of the rod 5 that is provided in the cylinder 2 and that is relative to the cylinder 2 A resistance generating portion 7 for generating a resistance force against the relative movement in the rod 5 in relation to the lead 6, and the axial direction with respect to the closing members 3 and 4 among the closing members 3 and 4, the rod 5 and the cylinder 2. Annular seal members 10 and 11 having an annular seal surface 9 slidably contacting the cylindrical surface 8 of the rod 5 to seal between one member moving to A, in this example, the rod 5. And to the surface 8 of the rod 5 Adjusting means 12 and 13 for variably adjusting the pressing force of the control surface 9 and space removing means 14 for preventing a space (gap) from being generated around the lead 6 accommodated in the cylinder 2. .
[0025]
The annular blocking member 3 is attached to one annular end surface 22 in the axial direction A of the cylinder 2 by a plurality of screws 21 arranged at equal intervals in the circumferential direction. In this example, the end surface 22 and the end surface 22 are attached. A gap 24 is formed between the closing member 3 and the annular side surface 23 facing each other. The closing member 3 has a wedge-shaped space forming surface 26 that forms an annular wedge-shaped space, in this example, an annular truncated wedge-shaped space 25 in cooperation with the surface 8 of the rod 5.
[0026]
The closing member 4 includes a flange member 29 that is closely attached to the other annular end surface 28 in the axial direction of the cylinder 2 by a plurality of screws 27 arranged at equal intervals in the circumferential direction, and an inner peripheral surface 30 of the cylinder 2. And a wedge-shaped space forming surface 32 which forms an annular wedge-shaped space, in this example, an annular truncated wedge-shaped space 31 in cooperation with the surface 8 of the rod 5. And an annular spacer member 34 disposed between the flange member 29 and the annular member 33. The annular member 33 and the spacer member 34 may be slidable in the axial direction A with respect to the inner peripheral surface 30 of the cylinder 2 and the surface 8 of the rod 5 as in this example. 8 may be slidable in the axial direction A only.
[0027]
The cylinder 2 is fixed by being connected to the fixed side via the flange member 29 of the closing member 4 or directly in this example.
[0028]
The rod 5 has a threaded portion 35 at one end, and is connected to, for example, a vibrating body that intends to absorb vibration energy via the threaded portion 35.
[0029]
Lead 6 is accommodated in an annular space 43 surrounded by the inner peripheral surface 30 of the cylinder 2, the surface 8 of the rod 5, the seal members 10 and 11, and the movable members 41 and 42 of the adjusting means 12 and 13 without any gaps. .
[0030]
In this example, the resistance force generating portion 7 includes an annular bulging portion 45 formed integrally with the surface 8 of the rod 5, and the bulging portion 45 may be one as in this example. Instead of this, a plurality of them may be formed side by side with a predetermined interval in the axial direction A, and instead of being formed in an annular shape, a single cylindrical protrusion or a plurality of independent cylindrical shapes You may form like a protrusion.
[0031]
The seal member 10 having a deformed pentagonal shape in cross section has a plurality of, in this example, three annular recesses 46 in the seal surface 9 and is complementary to the wedge-shaped space forming surface 26. The wedge-shaped space forming surface 26 is slidably in contact with the contact surface 47 inclined with respect to the axial direction A and the annular engagement surface 48 of the movable member 41 and is inclined with respect to the axial direction A. Engaging surface 49.
[0032]
Similar to the seal member 10, the deformed pentagonal seal member 11 is configured in the same manner as the seal member 10, and includes a plurality of, in this example, three, annular recesses 51 on the seal surface 9. In addition, an annular contact surface 52 that is complementary to the wedge-shaped space forming surface 32 and slidably contacts the wedge-shaped space forming surface 32 and is inclined with respect to the axial direction A, and the movable member 42. An annular engagement surface 54 that engages with the annular engagement surface 53 and is inclined with respect to the axial direction A is provided.
[0033]
The adjusting means 12 is an annular movable member 41 that is movable in the axial direction A with respect to the closing member 3, and is screwed into the movable member 41 at a recess 60 of the movable member 41 and the closing member 3 is rotatable. And a screw member 61 for adjustment that moves the movable member 41 in the axial direction A by rotation, and a plurality of screw members 61 are provided at equal intervals in the circumferential direction. The movable member 41 is inclined with respect to the axial direction A of the seal member 10 via an annular engagement surface 48 inclined with respect to the axial direction A so as to transmit the movement to the seal member 10. The annular engagement surface 49 is engaged, and a force in the axial direction A is applied to the seal member 10 so that the annular contact surface 47 of the seal member 10 is pressed against the wedge-shaped space forming surface 26 of the closing member 3. It has become.
[0034]
The adjusting means 12 moves the movable member 41 in the axial direction A by rotating the enormous portion 63 of the screw member 61 disposed on the other annular side surface 62 of the closing member 3. The seal member 10 is moved in the axial direction A, and the pressing force of the seal surface 9 of the seal member 10 on the surface 8 is adjusted by inserting / removing the seal member 10 into / from the truncated wedge-shaped space 25.
[0035]
The adjusting means 13 is configured in the same manner as the adjusting means 12, and has an annular movable member 42 that is movable in the axial direction A with respect to the annular member 33 of the closing member 4, and a concave portion of the movable member 42 in the movable member 42. The screw member 65 includes a screw member 65 that is screwed at the point 64 and rotatably penetrates the annular member 33 and moves the movable member 42 in the axial direction A by the rotation. A plurality of movable engagement members 42 are provided at equal intervals in the circumferential direction similarly to 61, and the movable member 42 is an annular engagement surface that is inclined with respect to the axial direction A so as to transmit the movement to the seal member 11. The seal member 11 is engaged with an annular engagement surface 54 that is also inclined with respect to the axial direction A of the seal member 11 via 53, and a force in the axial direction A is applied to the seal member 11 to form an annular shape of the seal member 11. The contact surface 52 of the annular member 33 is a wedge-shaped space forming surface. It is adapted to be pressed to 2.
[0036]
The adjusting means 13 moves the movable member 42 in the axial direction A by rotating the enormous portion 73 of the screw member 65 arranged on the side surface 71 of the annular member 33 and in the through hole 72 of the spacer member 34, thereby moving the adjustment member 13. The seal member 11 is similarly moved in the axial direction A by the movement of the member 42, and the pressing force of the seal surface 9 of the seal member 11 on the surface 8 is adjusted by inserting / removing the seal member 11 into / from the truncated wedge-shaped space 31. ing.
[0037]
In this example, the space removing unit 14 includes a plurality of screws 21 arranged at equal intervals in the circumferential direction described above. The movable members 41 and 42 and the seal members 10 and 11 are moved by the adjusting units 12 and 13. As a result, when the accommodation space of the lead 6 in the cylinder 2 changes and a space (gap) is generated around the lead 6 accommodated in the cylinder 2, the screw 21 is rotated to move the closing member 3 in the axial direction. The lead 6 is moved to A so that the lead 6 is tightly accommodated in the cylinder 2. In order to reduce the pressing force of the sealing surface 9 of the sealing members 10 and 11 on the surface 8, it is preferable to loosen the screw 21 in advance.
[0038]
For example, the cylinder 2 or the eaves member 29 is fixed to the earth's crust, and the rod 5 is connected to a building via a screw portion 35 formed at one end thereof. When the building vibrates due to an earthquake or the like, the rod 5 moves in the axial direction A with respect to the cylinder 2. When the rod 5 moves relative to the cylinder 2 in the axial direction A, the lead 6 plastically flows through an annular passage defined by the bulging portion 45 of the rod 5 and the inner peripheral surface 30 of the cylinder 2. When the internal pressure of the cylinder 2 determined by the size of the annular passage acts alternately on the closing members 3 and 4 at both ends of the cylinder 2, the resistance force of the movement of the rod 5 relative to the cylinder 2 in the axial direction A is obtained. The vibration energy is absorbed by the deformation of the lead 6 in the plastic flow.
[0039]
Since the vibration energy absorbing device 1 includes adjusting means 12 and 13 for variably adjusting the pressing force of the seal surface 9 against the surface 8 of the rod 5, the optimum sealing performance can be easily achieved regardless of the lead pressure. Thus, it is possible to effectively prevent the lead 6 extending on the surface 8 of the rod 5 from leaking out of the cylinder 2, and to reduce the lead pressure in the cylinder 2 over a long period of use. Can be prevented, and deterioration of energy absorption characteristics can be eliminated.
[0040]
In the vibration energy absorbing device 1, the contact surfaces 47 and 52 of the seal members 10 and 11 are pressed against the wedge-shaped space forming surfaces 26 and 32 of the annular member 33 of the closing member 3 and the closing member 4. Moreover, the pressing of the sealing surface 9 to the surface 8 of the rod 5 is efficiently and reliably performed by this pressing, and thus the pressing force of the sealing surface 9 to the surface 8 of the rod 5 can be adjusted with certainty.
[0041]
Further, in the vibration energy absorbing device 1, the deformability of the seal members 10 and 11 is increased by the recesses 46 and 51, and the seal surface 9 can be brought into contact with the surface 8 of the rod 5 exactly. Since the lubricant such as grease can be stored at the locations 46 and 51, the rod 5 and the seal members 10 and 11 can be slid relatively smoothly without resistance.
[0042]
In addition, according to the vibration energy absorbing device 1, the screw members 61 and 65 are rotated to move the movable members 41 and 42 in the axial direction A, whereby the pressing force of the seal surface 9 to the surface 8 of the rod 5 can be easily achieved. Can be variably adjusted.
[0043]
Further, according to the vibration energy absorbing device 1, since the engaging surfaces 48 and 53 are inclined with respect to the axial direction A, the seal member 10 is moved when the movable members 41 and 42 are moved by the rotation of the screw members 61 and 65. And 11 can be pressed toward the surface 8 of the rod 5, so that inconveniences such as buckling of the seal members 10 and 11 can be avoided.
[0044]
Moreover, according to the vibration energy absorbing device 1, even if a space is generated around the lead 6 after adjusting the pressing force of the sealing surface 9 to the surface 8 of the rod 5 by the adjusting means 12 and 13, Since it can be removed by the removing means 14, the lead 6 can be tightly accommodated in the cylinder 2, so that energy absorption based on the plastic flow of the lead 6 can be performed as desired.
[0045]
In the above example, the seal members 10 and 11 having a deformed pentagonal cross section are used. However, the present invention is not limited to this, and may be a triangular shape, a quadrangular shape, or a polygonal shape having a hexagonal shape or more. 5 and FIG. 6 for the seal member 11, for example, a plurality of seal members 11 having a deformed cross-sectional shape in FIG. 5 are also provided on the seal surface 9 pressed against the surface 8 of the rod 5, three in this example. In addition to the annular recess 51, the annular member 33 has a shape complementary to the wedge-shaped space forming surface 32 of the annular member 33 and slidably contacts the wedge-shaped space forming surface 32. A seal having an inclined contact surface 52 and an engagement surface 54 that is engaged with the engagement surface 53 of the movable member 42 and that is inclined with respect to the axial direction A. The member 11 is also pressed against the surface 8 of the rod 5. A plurality of, in this example, three annular recesses 51 are provided on the lube surface 9, and the shape is complementary to the wedge-shaped space forming surface 32 of the annular member 33, and slides on the wedge-shaped space forming surface 32. A contact surface 52 that is movably contacted and inclined with respect to the axial direction A, and an engaging surface 54 that is engaged with the engaging surface 53 of the movable member 42 and is inclined with respect to the axial direction A are provided. is doing.
[0046]
The engaging surfaces 48 and 49 and 53 and 54 are preferably inclined, but the engaging surfaces 53 and 54 with respect to the axial direction A are, for example, as shown in FIG. You may make it orthogonally cross.
[0047]
In addition, as shown in FIG. 8, the closing member 4 is not composed of a plurality of members such as the flange member 29, the annular member 33, and the spacer member 34 as in the above example. You may comprise from one member.
[0048]
In the above, the rod 5 is moved relatively in the axial direction A with respect to the closing members 3 and 4, and the vibration energy absorbing device 1 is formed by providing the rod 5 with the resistance generating portion 7 including the bulging portion 45. However, instead of this, as shown in FIG. 9, the cylinder 2 moves relative to the closing members 3 and 4 in the axial direction A, and the resistance generating portion 7 is formed on the inner peripheral surface 30 of the cylinder 2. The vibration energy absorbing device 82 may be formed by providing the annular recess 81, and slidably contacting the seal surface 9 of the seal members 10 and 11 with the inner peripheral surface 30 which is the surface of the cylinder 2.
[0049]
In the case of the vibration energy absorbing device 82, the space removing means 14 includes a nut 83 that is screwed into a female screw formed on the surface 8 of the rod 5, and rotates the nut 83 to pivot the closing member 4. It may be moved in the direction A so that no space is created around the lead 6 accommodated in the cylinder 2.
[0050]
【The invention's effect】
According to the present invention, it is possible to easily obtain the optimum sealing performance regardless of the lead pressure, so that the lead spreading on the outer peripheral surface of the rod or the inner peripheral surface of the cylinder leaks out of the cylinder. It is possible to provide a vibration energy absorbing device that can effectively prevent, prevent a decrease in lead pressure in a cylinder during long-term use, and eliminate deterioration of energy absorption characteristics.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of an example of a preferred embodiment of the present invention.
FIG. 2 is a partially enlarged cross-sectional view of the example shown in FIG.
3 is a partially enlarged cross-sectional view of the example shown in FIG.
4 is an enlarged view of a part of FIGS. 2 and 3. FIG.
FIG. 5 is a partial side view of another example of the preferred embodiment of the present invention.
FIG. 6 is a partial side view of still another example of the preferred embodiment of the present invention.
FIG. 7 is a partial side view of still another example of the preferred embodiment of the present invention.
FIG. 8 is a partially cutaway side view of still another example of the preferred embodiment of the present invention.
FIG. 9 is a partially cutaway side view of still another example of the preferred embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vibration energy absorption apparatus 2 Cylinder 3, 4 Closure member 5 Rod 6 Lead 7 Resistance force generation part 8 Surface 9 Seal surface 10, 11 Seal member 12, 13 Adjustment means

Claims (3)

  A cylinder, a pair of closing members that close both ends of the cylinder in the axial direction, a rod that passes through the closing member, lead that is accommodated in the cylinder, and a rod that is provided in the cylinder and is connected to the cylinder. A resistance generating section that generates resistance against the relative movement in the axial direction on the rod in relation to lead, and one member that moves in the axial direction with respect to the closing member among each closing member, rod, and cylinder A sealing member having an annular sealing surface that is slidably in contact with the surface of the one member in order to seal the gap, and an adjusting means for variably adjusting the pressing force of each sealing surface on the surface of the one member; Space removing means for preventing a space from being generated around the lead contained in the cylinder, and each closing member cooperates with the surface of one member to form an annular wedge-shaped space. Space formation Each sealing member has a shape complementary to the wedge-shaped space forming surface, contacts the wedge-shaped space forming surface, and has a contact surface inclined with respect to the axial direction. Each adjusting means that applies an axial force to press the contact surface of the seal member against the wedge-shaped space forming surface of the closing member includes a movable member that is movable in the axial direction with respect to the closing member, A screw member that is screwed to the movable member and moves the movable member in the axial direction by rotation, and one closing member faces the end surface on one end surface in the axial direction of the cylinder and the end surface. The space removing means attaches one closing member to one end face in the axial direction of the cylinder and rotates one closing member in the axial direction by rotation. Can be moved Vibration energy absorption device that is equipped with a ball screw.   The vibration energy absorbing device according to claim 1, wherein the seal member has an annular recess on the seal surface.   The vibration energy absorbing device according to claim 1, wherein the movable member is engaged with the seal member via an engagement surface, and the engagement surface is inclined with respect to the axial direction.

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