JP3882264B2 - 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, The vibration energy transmitted to the building due to natural phenomena such as earthquakes and winds due to the plastic flow of lead generated by the relative movement of the rod with respect to the cylinder. To absorb.
[0003]
Since such a vibration energy absorbing device causes plastic flow in lead in the cylinder, the resistance force F generated thereby is F = K · S · lnER + M (where K is a constant determined by experiment, S Is the axial pressure-receiving area of cylinder relative to lead, ER is the area ratio that determines the annular passage through which lead flows, M is the resistance force based on the friction between the cylinder inner wall and lead and between the rod outer periphery and lead) As schematically shown and apparent from this equation, it depends greatly on the lubrication between the cylinder inner wall and lead and between the rod outer periphery and lead. In order to obtain it over a long period of time, it is necessary to always maintain the lubrication state between them at a predetermined value, and the determinants of the resistance force F are quite complicated, so that sufficiently high design accuracy is obtained. Difficult to do That.
[0004]
In view of this, the present applicant firstly arranged a cylinder closed at both ends and the both ends of the cylinder so as to be relatively movable with respect to the cylinder, and the outer peripheral surface of the portion arranged in the cylinder. A vibration energy absorbing device has been proposed comprising a rod having a recess formed therein and lead disposed in the cylinder extending to the recess of the rod (see JP-A-6-307484).
[0005]
The vibration energy absorbing device according to this proposal is not greatly affected by the lubrication state between the cylinder and the rod and the lead, and can obtain the designed resistance force over a long period of time and has the desired characteristics with high accuracy. It was confirmed that the initial purpose such as designing can be preferably achieved.
[0006]
However, this vibration energy absorbing device forms a recess in the peripheral surface of the rod in a portion that penetrates lead, and extends the lead in this recess, so that the lead in the recess and the lead surrounding the peripheral surface of the rod In order to absorb the vibration energy by generating shear deformation between the two, a recess having a predetermined depth is required in order to surely generate the desired shear deformation in the lead. In order to maintain the strength, it is necessary to make the rod diameter at the concave portion more than a certain value. Therefore, this vibration energy absorbing device requires a thickness (width) obtained by adding the rod diameter to the depth of the recess, and it is difficult to provide a thin and compact device. When a vibration energy absorbing device is embedded to form a vibration control wall, a device having a small vibration energy absorbing function must be employed.
[0007]
The present invention has been made in view of the above-described points. The object of the present invention is to be able to be thin and small, and to exhibit a desired vibration energy absorbing function even if it is thin and small. It is an object of the present invention to provide a vibration energy absorbing device that can be used.
[0008]
[Means for Solving the Problems]
The vibration energy absorbing device of the present invention has a first relative movable body in which a first lead accommodating space is formed, and faces the first lead accommodating space of the first relative movable body so as to communicate with both ends thereof. And a second lead containing space formed of a through hole is formed, and a second relative movable body sealing the first and second lead containing spaces in cooperation with the first relative movable body, The first and second lead containing spaces are closely packed with lead, and the first relative movable body is a confrontation between the first lead containing space and the second lead containing space. So as to cause shearing of the lead within the surface to be moved, the lead relative to the second relative movable body is movably disposed. , And is defined by an endless wall surface that intersects the facing surface.
[0009]
In the vibration energy absorbing device of the present invention, the first relative movable body includes a pair of sandwiching bodies that slidably sandwich the second relative movable body. The surface side that is slidably in contact with the relative movable body is provided with a recess as a first lead accommodating space, and the second relative movable body is a second lead accommodating intervened between the two recesses. A through hole is provided as a space.
[0010]
The first lead containing space may be a prismatic or elliptical column-shaped recess having a long side or a long axis in the relative movable direction of the first and second relative movable bodies, or the first and second in the cross section. It may be an oval columnar (long cylindrical) recess extending in the relative movable direction of the second relative movable body. As a reference example of the first lead accommodating space, a cylindrical recess can be cited.
[0011]
The second lead containing space may be a prismatic or elliptical column-shaped through hole having a long side or a long axis in the relative movable direction of the first and second relative movable bodies, or the first and second in the cross section. It may be an elliptical columnar (long cylindrical) through-hole extending in the relative movable direction of the second relative movable body. In addition, a cylindrical through-hole can be mentioned as a reference example of the second lead accommodating space.
[0012]
The length of the first lead storage space in the relative movement direction of the first and second relative movable bodies may be shorter than the length of the second storage space in the same direction. As a reference example, when the lengths of the first and second lead containing spaces in the relative movable direction of the first and second relative movable bodies are substantially the same or different from each other, The length of the 1st lead storage space in the same direction can mention the length longer than the length of the 2nd storage space.
[0013]
Each of the first and second lead containing spaces may be one, or two or more.
[0014]
Lead may also be provided with pressurized, specifically, it may have been placed under pressure with a pressure of 5 kgf / cm ² to 1000 kgf / cm ^2.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention and the embodiments of the present invention will be described in more detail based on preferred embodiments shown in the drawings. The present invention is not limited to these examples.
[0016]
【Example】
1 to 3, the vibration energy absorbing device 1 of the present example faces the first relative movable body 3 in which the first lead accommodating space 2 is formed and the lead accommodating space 2 of the relative movable body 3. A second lead movable space 4 is formed which is communicated at both ends and is formed with a through hole 31 and seals the lead lead spaces 2 and 4 in cooperation with the relative movable member 3. 5 and lead 6 closely packed in the lead containing spaces 2 and 4.
[0017]
The relative movable body 3 includes a pair of sandwiching bodies 13 and 14 that slidably sandwich the relative movable body 5 from both sides 11 and 12 side in the A direction. Recesses 17 and 18 are provided as lead-containing spaces 2 on the surfaces 15 and 16 slidably contacting the surfaces 11 and 12 of the relative movable body 5 in the A direction.
[0018]
The sandwiching body 13 includes a main body 19 having a U-shaped cross section in which a recess 17 is formed, and flange portions 20 and 21 formed integrally on both sides of the main body 19. And is fixed to the flange portions 20 and 21 of the sandwiching body 13 by bolts 22.
[0019]
The relative movable body 5 is provided with a through hole 31 as a lead containing space 4 interposed between the two recesses 17 and 18, and is formed from a plate-like body.
[0020]
Thus, the relative movable body 3 is relative to the relative movable body 5 so that the lead 6 is sheared in the A direction within the facing surfaces 35 and 36 of the lead containing space 2 and the lead containing space 4. In this example, the recesses 17 and 18 as the lead containing space 2 substantially intersect the surfaces 35 and 36, respectively. The through-hole 31 as the lead containing space 4 is defined by an endless annular wall surface 39 that intersects each of the surfaces 35 and 36 and is orthogonal in this example.
[0021]
The recesses 17 and 18 and the through-hole 31 are elliptical cylinders having a major axis in the relative movable direction A as shown in FIG. 4B, and the relative movable direction A as shown in FIG. Further, it may be a prism having a long side, or a long cylindrical shape extending in the relative movable direction A as shown in FIG. Further, for example, the recesses 17 and 18 may have an elliptical column shape, and any combination thereof may be used so that the through hole 31 is a prismatic recess. As a reference example of the recesses 17 and 18 and the through hole 31, a cylindrical shape is shown in FIG. 4A, and a square prism shape is shown in FIG.
[0022]
Further, the lengths of the recesses 17 and 18 in the relative movable direction A are shorter than the length of the through hole 31 as shown in FIG. For reference, the lengths of the recesses 17 and 18 and the through holes 31 in the relative movable direction A are substantially the same as each other, as shown in FIG. The length is longer than the length of the through hole 31.
[0023]
Lead 6 is arranged are densely filled in the recess 17 and 18 and the through-hole 31 is pressurized with a pressure of 5 kgf / cm ² to 1000 kgf / cm ^2. In addition, it is not always necessary to arrange the lead 6 under pressure.
[0024]
In the vibration energy absorbing device 1 described above, for example, the relative movable body 3 is rotatably connected to and attached to the upper rail defining the wall of the building via the hole 51 of the sandwiching body 14 and the bolt inserted into the hole 51. The relative movable body 5 is pivotally connected and attached to the lower rail defining the wall of the building via the holes 52 of the relative movable body 5 and the bolts inserted into the holes 52, and the damping wall is attached. Used as configured.
[0025]
When the structure is vibrated due to an earthquake or the like, the relative movable body 5 is vibrated in the A direction with respect to the relative movable body 3, and when the relative movable body 5 is relatively moved in the A direction, the relative movable body 3. Since the lead 6 arranged in the recesses 17 and 18 also extends into the through hole 31 of the relative movable body 5, shear deformation occurs in the lead 6 on the surfaces 35 and 36 which are virtual shear surfaces, and the lead 6 This shear deformation absorbs the energy of the relative movement of the relative movable body 5 in the A direction, a part of the absorbed energy is immediately released as heat, and the rest is stored in the sheared lead 6 to recover it. Contributes to recrystallization.
[0026]
By the way, in the vibration energy absorbing device 1, since the relative movable body 5 does not extend in the through hole 31, the thickness T of the vibration energy absorbing device 1 can be reduced. The function can be maintained as desired and can be preferably applied.
[0027]
【The invention's effect】
As described above, according to the present invention, it can be configured to be thin and small, and a desired vibration energy absorbing function can be exhibited even if it is thin and small.
[Brief description of the drawings]
FIG. 1 is a perspective view of a preferred embodiment of the present invention.
2 is a cross-sectional view taken along line II-II of the embodiment shown in FIG.
FIG. 3 is a perspective view of a second relative movable body shown in FIG.
4 is a cross-sectional view taken along the line IV-IV shown in FIG. 2 of various examples including reference examples of recesses and through holes.
FIG. 5 is a partial cross-sectional view taken along the line II-II shown in FIG. 1 of various examples including reference examples of recesses and through holes.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vibration energy absorber 2 1st lead accommodation space 3 1st relative movable body 4 2nd lead accommodation space 5 2nd relative movable body 6 Lead 37, 38, 39 Endless annular wall surface

Claims (2)

  A first relative movable body in which a first lead accommodating space is formed, a second lead consisting of a through hole and facing the first lead accommodating space of the first relative movable body at both ends. A second relative movable body in which a lead containing space is formed and sealing the first and second lead containing spaces in cooperation with the first relative movable body, and the first and second lead containing spaces And the first relative movable body is adapted to cause shearing of lead in the facing surfaces of the first lead containing space and the second lead containing space. The first and second lead containing spaces are defined by endless wall surfaces intersecting the facing surfaces of the corresponding relative movable bodies. The first relative movable body includes a pair of sandwiching bodies that slidably sandwich the second relative movable body. Each has a recess as a first lead-containing space on the side of the surface that slidably contacts the second relative movable body, and the through-hole of the second relative movable body has a biconcave shape. The first lead accommodating space is interposed between the places, the prismatic recess having a long side in the relative movable direction of the first and second relative movable bodies, and the first and second relative movable bodies. An elliptical columnar recess having a long axis in the relative movable direction or a long cylindrical recess extending in the relative movable direction of the first and second relative movable bodies, the second lead containing space is A prismatic through hole having a long side in the relative movable direction of the second relative movable body, an elliptic cylindrical through hole having a long axis in the relative movable direction of the first and second relative movable bodies, or the first and second A long cylindrical through-hole extending in the relative movable direction of the relative movable body, and the first lead-containing space in the relative movable direction of the first and second relative movable bodies. The length of a short vibration energy absorption device than the length of the second housing space in the same direction. Lead, vibration energy absorbing device according to claim 1 are arranged in the first and second lead housing space is pressurized with a pressure of 5 kgf / cm ² to 1000 kgf / cm ^2.

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