Displacement restraining device

Abstract

To provide a displacement restraining device, etc. that exert a displacement restraining effect on displacements in both normal and reverse directions associated with reciprocating vibrations, and can be repeatedly used.SOLUTION: A displacement restraining device 1 restrains displacements of an upper structure 4 by colliding with collision parts 41. In the displacement restraining device 1, a rod 20 extending in a direction connecting the collision parts 41 separated in a plane penetrates a cylindrical body 10. Both end parts of the rod 20 protrude to the sides of the respective collision parts 41 from the cylindrical body 10. Predetermined clearances c are provided between both end parts of the rod 20 and the respective collision parts 41. When the collision parts 41 collide with the end parts of the rod 20 and the rod 20 moves in an axial direction of the rod 20 inside the cylindrical body 10, collision energy is absorbed by an energy absorbing mechanism provided in the cylindrical body 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a displacement suppression device for suppressing displacement of a building skeleton or the like. [Background technology]

[0002] In seismically isolated buildings, measures may be taken to keep the displacement of the building structure within a certain range in order to prevent excessive inter-story displacement in the seismic isolation layer when subjected to earthquake motions that exceed expected levels.

[0003] For example, Patent Documents 1 and 2 describe how shock-absorbing materials such as high-damping rubber are installed in the retaining walls of a seismically isolated building, and when a large displacement occurs in the building structure, the building structure is allowed to collide with the retaining wall via the shock-absorbing material, absorbing the energy of the collision and limiting the displacement of the building structure within a certain range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-77229 A [Patent Document 2] Patent Publication No. 2022-63715 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the shock absorbing materials such as the high damping rubber mentioned above only act on the displacement of the building frame in the direction that compresses the shock absorbing material. Therefore, in order to obtain the effect on the displacement of the building frame in both forward and reverse directions caused by reciprocating vibrations such as during an earthquake, it is necessary to install a pair of shock absorbing materials (and retaining walls) on both sides of the building frame.

[0006] This means that the number of shock absorbing materials required increases, which can easily lead to increased costs. In addition, depending on the number of shock absorbing materials required, there may be a problem of being unable to secure the space to install them. Furthermore, it is essential to ensure a clearance between each shock absorbing material and the building frame, which requires a large space around the installation location of each shock absorbing material.

[0007] In addition, depending on the type of shock absorbing material and the degree of vibration, the shock absorbing material may not return to its original state after being pushed in, and the gap between the shock absorbing material and the building frame may become larger than the original clearance. In this case, there is also the issue that the recovery work will be time-consuming, such as the need to replace the shock absorbing material to return the gap to the original size after vibration.

[0008] The present invention has been made in consideration of the above problems, and aims to provide a displacement suppression device that can suppress displacement in both forward and reverse directions caused by reciprocating vibrations and can be used repeatedly. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention provides a displacement suppression device that suppresses the displacement of an object by colliding with a collision site, the displacement suppression device being characterized in that a rod extending in a direction connecting collision sites spaced apart in a plane penetrates a cylindrical body, both ends of the rod protrude from the cylindrical body towards each collision site, a predetermined clearance is provided between both ends of the rod and each collision site, and when the collision site collides with the end of the rod and the rod moves inside the cylindrical body in the axial direction of the rod, the collision energy is absorbed by an energy absorption mechanism provided in the cylindrical body.

[0010] In the displacement suppression device of the present invention, each of the ends of the rod collides with the collision site, and the rod is pushed in both forward and reverse directions and absorbs the collision energy when it moves inside the cylinder. As a result, a single displacement suppression device can repeatedly exert a displacement suppression effect against the displacement in both forward and reverse directions of a building frame or the like caused by reciprocating vibration. Therefore, the number of displacement suppression devices installed can be reduced, costs can be reduced, and installation locations can be easily secured. In addition, the clearance required for reciprocating vibration can be concentrated on both sides of a single displacement suppression device, so space saving can be achieved and there are few restrictions on the placement of other equipment. In addition, the direction in which the rod is pushed in alternates due to the reciprocating vibration, so the rod returns to near its original position after the vibration ends, and the change in clearance after vibration is also small.

[0011] It is preferable that the energy absorbing mechanism absorbs collision energy by friction when the rod moves inside the cylindrical body. This allows the displacement suppression device to function as a friction damper that absorbs collision energy through friction, and by lengthening the stroke of the rod, it is possible to absorb large amounts of energy. In addition, by adjusting the tightening force of the friction material on the rod, the resistance force can be set as desired, and high durability against repeated vibrations can be expected.

[0012] It is desirable to provide a buffer body at the end of the rod, which is deformable in a horizontal direction perpendicular to the axial direction of the rod. With the above-mentioned buffer, even if there is a relative displacement between the two parts in a direction perpendicular to the collision when the collision portion collides with the end of the rod, the buffer will deform in response to this, thereby preventing damage to the displacement suppression device.

[0013] The shock absorbing body is, for example, a laminated rubber. When the impact part collides with the end of the rod, even if the impact surfaces of both parts are oriented in different directions, the laminated rubber can follow the difference in the orientation of the impact surface by deforming in the thickness direction, preventing damage to the displacement suppression device. In addition, because the laminated rubber has sufficient rigidity in the thickness direction, deformation of the laminated rubber part is small even during a collision, and the performance of the displacement suppression device is not impaired.

[0014] It is desirable that an adjustment mechanism be provided at the end of the rod for adjusting the distance between the end and the collision site. This makes it possible to easily return the gap to the original clearance size even if the gap between the end of the rod and the collision site changes from the original clearance size after vibration.

[0015] The collision site is, for example, a part of the object. This eliminates the need to provide a new collision site, allowing for a more rational design. Effect of the Invention

[0016] The present invention can provide a displacement suppression device and the like that exhibits a displacement suppression effect against displacement in both forward and reverse directions caused by reciprocating vibration and that can be used repeatedly. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing a displacement suppression device 1. [Diagram 2] A diagram showing the vibration process of the upper structure 4. [Diagram 3] 4A to 4C are diagrams for explaining deformation of laminated rubber 221. [Figure 4] 4A to 4C are diagrams for explaining an adjustment mechanism 222. [Diagram 5] An example of the placement of the displacement suppression device 1. [Figure 6] FIG. 2 is a diagram showing a displacement suppression device 1a. [Figure 7] An example of application of displacement suppression device 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0019] Fig. 1 is a diagram showing a displacement suppression device 1 according to an embodiment of the present invention, in which Fig. 1(a) is a diagram showing the displacement suppression device 1 as seen from the side, and Fig. 1(b) is a diagram showing the displacement suppression device 1 as seen from above.

[0020] The displacement suppression device 1 is installed on the rising portion 31 of the substructure 3 of a seismically isolated building, and suppresses the displacement of the superstructure 4 when the superstructure 4 (target object) of the seismically isolated building collides with the collision portion 41 due to vibrations such as an earthquake.

[0021] The substructure 3 and the superstructure 4 are the building foundation and building frame, respectively, and are structures made of reinforced concrete or steel, but are not limited to these. The collision site 41 is a part hanging down from the superstructure 4, and there is no need to provide a new collision site in addition to the superstructure 4, allowing for a rational design. The collision site 41 is located on both sides of the displacement suppression device 1, spaced apart, in plan view.

[0022] The displacement suppression device 1 is configured such that a rod 20 extending in a direction connecting the collision sites 41 is disposed so as to penetrate the cylindrical body 10. The rod 20 is configured such that impact receiving portions 22 are provided at both ends of an axial rod main body 21. The rod main body 21 is movable in the axial direction within the cylindrical body 10, and both ends of the rod 20 protrude from the cylindrical body 10 toward each collision site 41. The cylindrical body 10 is a steel member, but is not limited to this, and may be made of other materials such as concrete. The rod main body 21 is also a steel member, but is not limited to this, and may be made of other metals such as stainless steel.

[0023] A protruding portion 11 that protrudes laterally from the cylindrical body 10 is provided at the lower part of the cylindrical body 10. The protruding portion 11 is disposed on the upper surface of a rising portion 31 of the lower structure 3, and is fixed to the rising portion 31 by an anchor material 12. The protruding portions 11 are provided at both ends of the cylindrical body 10 in the axial direction.

[0024] A cotter 13 is provided on the underside of the cylindrical body 10 at the center in the axial direction of the cylindrical body 10. The cotter 13 protrudes downward from the cylindrical body 10 and is embedded in the concrete of the rising portion 31. The displacement suppression device 1 is fixed to the rising portion 31 by this cotter 13 and the above-mentioned anchor material 12, and displacement of the cylindrical body 10 is prevented when the collision occurs at the collision site 41. In this embodiment, by using the cotter 13 in combination, the number of anchor materials 12 can be reduced, improving workability.

[0025] The impact receiving parts 22 are provided at both ends of the rod 20 in order to collide with the collision parts 41. A predetermined clearance c of the same size is provided between the impact receiving parts 22 and each collision part 41. The value of the clearance c is set to be larger than the maximum displacement of the superstructure 4 due to the design earthquake motion, and is determined as a fail-safe so that the impact receiving parts 22 collide with the collision parts 41 only when vibrations exceeding the expected magnitude occur.

[0026] The impact receiving portion 22 has a laminated rubber 221 provided at the end of the rod body 21 and an adjustment mechanism 222 provided on the impact site 41 side of the laminated rubber 221 .

[0027] The laminated rubber 221 is a shock absorber having a structure in which rubber layers and steel plates are alternately laminated between plate-shaped flanges made of steel plates. The laminated rubber 221 is arranged with the lamination direction horizontal, and one flange is fixed to the end plate 211 at the end of the rod main body 21 with a bolt or the like.

[0028] The laminated rubber 221 of this embodiment is made thicker by one rubber layer than general laminated rubber for seismic isolation, ensuring the deformation performance of the rubber layer in the thickness direction of the laminated rubber, but by keeping the number of layers to the minimum necessary, it is a thinner member than general laminated rubber for seismic isolation. However, the laminated rubber 221 is not limited to this.

[0029] The adjustment mechanism 222 is a mechanism for adjusting the gap between the impact receiving portion 22 and the collision site 41. The configuration of the adjustment mechanism 222 and the method of adjusting the gap will be described later.

[0030] In this embodiment, as shown in Figure 2(a), when the upper structure 4 is displaced as shown by arrow A1 due to an earthquake or the like and one collision portion 41 of the upper structure 4 collides with the impact receiving portion 22 at one end of the rod 20, the rod main body 21 moves axially within the cylindrical body 10 as shown in Figure 2(b).

[0031] In this embodiment, a friction material (not shown) provided inside the cylindrical body 10 is pressed against the rod main body 21, and when the rod main body 21 moves, it slides on the friction material, and the frictional resistance absorbs (consumes) the collision energy, suppressing the displacement of the superstructure 4. The friction material corresponds to the energy absorption mechanism of the present invention, and can absorb large amounts of energy by increasing the frictional resistance force or lengthening the stroke of the rod 20. Furthermore, when the displacement suppression device 1 is used in a place exposed to rain and wind, the internal friction material and the rod main body 21 can be protected by the cylindrical body 10.

[0032] In this embodiment, even when the superstructure 4 is displaced in the opposite direction from the previous direction as indicated by the arrow A2 due to reciprocating vibrations during an earthquake or the like, as shown in Fig. 2(c), the other impact portion 41 of the superstructure 4 impacts the impact receiving portion 22 at the other end of the rod 20. This causes the rod main body 21 to move in the opposite direction from the previous direction within the cylindrical body 10, and as described above, the collision energy is absorbed by frictional resistance, suppressing the displacement of the superstructure 4.

[0033] In this embodiment, the rod 20 is pushed in during the process shown in Fig. 2(b), so that the rod 20 moves toward the other collision site 41 from the original position shown in Fig. 1. Therefore, the other collision site 41 collides with the end of the rod 20 early, and the collision starts early, so that a larger energy can be absorbed.

[0034] In this manner, in this embodiment, a single displacement suppression device 1 can exert a displacement suppression effect against displacements in both forward and reverse directions of the superstructure 4. In addition, at this time, the rod 20 moves in both forward and reverse directions, and the collision part 41 repeatedly collides alternately with both ends of the rod 20 during the vibration process, so that the displacement of the superstructure 4 can be converged early by repeatedly absorbing energy.

[0035] 3(a) is a top view of the state in which the collision portion 41 collides with the impact receiving portion 22. In this example, when the collision portion 41 collides, the collision surface of the collision portion 41 on the impact receiving portion 22 side is not parallel in a plane to the collision surface of the impact receiving portion 22 (shown by the dashed line in the figure) on the collision portion 41 side before the collision. Note that the arrow A in FIG. 3(a) indicates the collision direction of the collision portion 41, which corresponds to the axial direction of the rod 20.

[0036] In this case, in the impact receiving section 22, the laminated rubber 221 deforms in the thickness direction (corresponding to the left and right direction in FIG. 3(a)) in accordance with the difference in the orientation of the impact surface described above, absorbing the difference in angle between the impact part 41 and the adjustment mechanism 222, preventing damage to the surface of the impact part 41 and displacement of the plates constituting the adjustment mechanism 222. In addition, since the laminated rubber 221 has some flexibility in the thickness direction, it is possible to reduce the impact force at the moment of impact.

[0037] 3(b) is also a top view of the state in which the impact site 41 has impacted with the impact receiving portion 22, but in this example, the upper structure 4 is displaced not only in the impact direction A but also in the orthogonal impact direction indicated by the arrow B. The orthogonal impact direction is a direction perpendicular to the impact direction.

[0038] In this case, in the impact receiving portion 22, the laminated rubber 221 deforms in the horizontal direction following the displacement in the impact perpendicular direction B described above, thereby reducing the bending stress generated in the rod main body 21 and preventing damage to the displacement suppression device 1. The laminated rubber 221 deforms only while the impact portion 41 and the adjustment mechanism 222 are in contact. When the impact ends and the impact portion 41 and the adjustment mechanism 222 separate, the laminated rubber 221 returns to its original position while vibrating due to its own restoring force. At this time, by using high damping rubber as the rubber material for the laminated rubber 221, the vibrating time can be shortened and the deformation can be eliminated more quickly.

[0039] In this manner, in this embodiment, by using the laminated rubber 221 as the cushioning material, the difference in the orientation of the collision surface between the collision part 41 and the impact receiving part 22 and the displacement of the collision part 41 in the direction perpendicular to the collision are absorbed, and no extra force is generated in the rod main body 21, which makes it possible to prevent damage to the displacement suppression device 1, and also makes it possible to reduce the diameter of the rod main body 21 and simplify the fixing mechanism of the cylindrical body 10 to the lower structure 3. In addition, after the collision, the shape of the laminated rubber 221 returns to its original shape due to the restoring force of the laminated rubber 221, and no special adjustment is required. Note that although Figs. 3(a) and (b) show a plan view, the same can be said about a vertical plane, and the laminated rubber 221 can absorb the difference in the orientation of the collision surface in the vertical plane.

[0040] 2(a) to 2(c), during each reciprocating vibration of the upper structure 4, the collision portion 41 collides with the impact receiving portion 22, and the direction in which the rod 20 is pushed in alternates. Then, when the displacement of the upper structure 4 falls below the clearance c, the collision portion 41 no longer collides with the impact receiving portion 22, and after the vibration, the rod 20 returns to near the original position shown in FIG.

[0041] However, after vibration, the rod 20 may not return to its original position completely, and the distance between the impact receiving part 22 and the collision part 41 may change from the original clearance c, in which case there is a risk that when the next earthquake or the like occurs, different parts of the seismic isolation layer may collide with each other first, or the displacement suppression device 1 may not be able to exert its displacement suppression effect. For this reason, in this embodiment, the adjustment mechanism 222 is used to adjust the distance, making it possible to easily return the clearance to the original size c.

[0042] That is, as shown in Fig. 4(a), the adjustment mechanism 222 of this embodiment is configured such that a plate material 222a is fastened to a flange 221a on the collision site 41 side (corresponding to the left side of Fig. 4(a)) of the laminated rubber 221 by fasteners 222b made of bolts and nuts, and one or more adjustment plates 222c are sandwiched between the outer plate material 222a and the flange 221a. Then, the fasteners 222b are loosened to increase or decrease the number of adjustment plates 222c, and the fasteners 222b are fastened again, so that the above-mentioned interval can be easily adjusted by the overall thickness of the adjustment mechanism 222. The head of the bolt of the fastener 222b is accommodated in a recess provided in the plate material 222a, and does not protrude from the plate material 222a to the collision site 41 side.

[0043] The adjustment work described above does not require complete removal of bolts and nuts, and the weight of the adjustment plate 222c is small enough to be handled by hand, so the adjustment work can be easily performed on-site. As shown in Fig. 4(b), the elevation of the adjustment plate 222c is T-shaped, and by hooking the protruding part at the top onto the bolt of the fastener 222b, the adjustment plate 222c can be easily installed between the plate material 222a and the flange 221a while avoiding the position of the bolt. However, the shape and installation method of the adjustment plate 222c are not limited to this.

[0044] The above has been an explanation of one displacement suppression device 1, but in an actual seismically isolated building, in order to enable the displacement suppression device 1 to respond to shaking in two perpendicular directions, it is preferable to arrange multiple displacement suppression devices 1, each with the axial direction of the rod 20 aligned in one of the two directions, as shown in Figure 5.

[0045] Furthermore, with respect to multiple displacement restraint devices 1 with the same axial direction of the rod 20, the clearance c may be the same for all of the displacement restraint devices 1, or may be different lengths. In the latter case, the resistance force of the entire displacement restraint device 1 changes stepwise, making it possible to avoid the occurrence of an impulsive response in the event of a collision.

[0046] As described above, in the displacement suppression device 1 of this embodiment, each of the ends of the rod 20 collides with the collision site 41, and the rod 20 is pushed in both forward and reverse directions and absorbs the collision energy when it moves inside the cylindrical body 10. As a result, one displacement suppression device 1 can repeatedly exert a displacement suppression effect against the displacement of the superstructure 4 in both forward and reverse directions due to reciprocating vibration. Therefore, the number of displacement suppression devices 1 installed can be reduced, costs can be reduced, and installation locations can be easily secured. In addition, the clearance c required for reciprocating vibration can be concentrated on both sides of one displacement suppression device 1, so space saving can be achieved and restrictions on the arrangement of other equipment are unlikely to occur. In addition, since the direction in which the rod 20 is pushed in alternates due to the reciprocating vibration, the rod 20 returns to near its original position after the vibration ends, and the change in clearance after the vibration is also small.

[0047] Furthermore, in this embodiment, even if the orientations of the collision surfaces of the collision portion 41 and the impact receiving portion 22 differ when the collision portion 41 collides with the impact receiving portion 22, the laminated rubber 221 of the impact receiving portion 22 can follow the difference in orientation due to deformation in the thickness direction, thereby preventing damage to the displacement suppression device 1. Furthermore, even if there is a relative displacement between the collision portion 41 and the impact receiving portion 22 in a direction perpendicular to the collision when the collision portion 41 collides with the impact receiving portion 22, the laminated rubber 221 can prevent damage to the displacement suppression device 1 by deforming horizontally to follow the displacement. Since the laminated rubber 221 has sufficient rigidity in the thickness direction, deformation of the laminated rubber portion is small even during a collision, and the performance of the displacement suppression device 1 is not impaired.

[0048] Furthermore, in this embodiment, if the distance between the impact receiving part 22 and the collision site 41 changes from the original clearance c after vibration, the adjustment mechanism 222 can easily return the distance to the original clearance c on-site, eliminating the need to replace the displacement suppression device 1 or move the rod 20.

[0049] However, the present invention is not limited to the above embodiment. As an example, in the above embodiment, the displacement suppression device 1 functions as a friction damper that absorbs collision energy by friction resistance, and the resistance force can be set arbitrarily by adjusting the fastening force of the friction material to the rod 20 (rod body 21), and high durability against repeated vibrations can be expected, but the energy absorption mechanism is not limited to this.

[0050] For example, as shown in FIG. 6, a hydraulic circuit 100 may be provided inside the cylinder 10a, and the displacement suppression device 1a may function as a hydraulic damper that absorbs (consumes) collision energy by the fluid resistance of the hydraulic oil 103 when the rod 20 moves. In this case, the fluid resistance can be adjusted by an adjustment valve 106 provided in a flow path 105 that connects the oil chambers 102 on both sides of the piston 101, and the resistance can be made zero by opening the adjustment valve 106 after vibration, and the rod 20 can be easily returned to the original position. Therefore, the adjustment mechanism 222 can be omitted. If the adjustment mechanism 222 can be omitted, it will lead to a space saving in the device installation position, and it will be possible to further expand the range of application.

[0051] The piston 101 is provided in the middle of the rod body 21, and a flow passage 104 is provided inside the piston 101 to connect the oil chambers 102 on both sides of the piston 101. A pressure regulating valve and a relief valve are disposed in the flow passage 104. The flow passage 105 is provided outside the piston 101 to connect both oil chambers 102. However, the configuration of the hydraulic circuit 100 is not limited to this.

[0052] In addition, in the above-mentioned friction displacement suppression device 1, it is possible to release the pressure of the friction material against the rod body 21 after vibration, manually move the rod 20, and return the rod 20 to its original position, and in this case, the above-mentioned adjustment mechanism 222 can be omitted.

[0053] Furthermore, in the above embodiment, the cotters 13 protruding from the cylindrical body 10 are embedded in the concrete of the rising portion 31 of the substructure 3, but instead, perforated steel plate dowels (not shown) protruding vertically downward from the cylindrical body 10 may be embedded in the concrete of the rising portion 31. This also makes it possible to fix the displacement suppression device 1 to the rising portion 31. Perforated steel plate dowels are excellent as a fixing mechanism for the displacement suppression device 1 because they can withstand a large shear force due to the concrete filled in the holes.

[0054] In the above embodiment, the laminated rubber 221 is used as the cushioning material of the impact receiving portion 22, but the cushioning material is not limited to this, and high damping rubber (other than laminated rubber) such as a fender may also be used.

[0055] In the above embodiment, as explained in Fig. 3(b), the horizontal deformation of the laminated rubber 221 absorbs the displacement of the upper structure 4 in the direction perpendicular to the collision, but it is also possible to reduce the bending stress generated in the rod main body 21 by providing a sliding plate (not shown) on the collision surfaces of both the collision part 41 and the impact receiving part 22, for example, and making the sliding plate on the collision part 41 side slide on the sliding plate on the impact receiving part 22 side. In this case, the laminated rubber 221 can be omitted. However, it is necessary to provide a sliding plate also on the collision part 41, and in this respect, it is advantageous to use the laminated rubber 221.

[0056] In this embodiment, the substructure 3 on which the displacement suppression device 1 is provided is the building foundation, but the substructure 3 is not limited to this and may be, for example, an intermediate floor of a building. In this case, the upper structure 4 is a skeleton part of the building that is higher than the intermediate floor.

[0057] Furthermore, although in this embodiment the displacement suppression device 1 is provided on the lower structure 3, as shown in Fig. 7(a), the displacement suppression device 1 may be provided on the upper structure 4. In the example of Fig. 7(a), the displacement suppression device 1 provided on the hanging part 42 of the upper structure 4 is arranged between the collision sites 32 of the lower structure 3, and in this case as well, the displacement of the upper structure 4 during an earthquake or the like can be suppressed by the displacement suppression device 1.

[0058] The application of the displacement suppression device 1 is not limited to seismic isolation buildings, but can be applied to any object where displacement occurs due to reciprocating vibration. For example, it can be applied to suppress the displacement of a weight (object) in a Tuned Mass Damper (TMD), or it can be applied to a gap brace as shown in FIG. 7(b).

[0059] Gap braces enhance the seismic safety of buildings by suppressing excessive inter-story deformation by starting to apply braces 30 after a certain inter-story deformation angle has occurred. In the example of Fig. 7(b), a displacement suppression device 1 is installed at the apex of the V-shaped brace 30, and collision points 43 are installed on the frame 40 consisting of columns and beams on both sides of the displacement suppression device 1.

[0060] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above examples. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally belong to the technical scope of the present invention. [Explanation of symbols]

[0061] 1, 1a: Displacement suppression device 3: Substructure 4:Superstructure 10: Cylinder 20: Rod 21: Rod body 22: Impact receiving part 32, 41, 43: Collision site 221:Laminated rubber 222: Adjustment mechanism

Claims

1. A displacement suppression device that suppresses displacement of an object by colliding with a collision site, A rod extending in a direction connecting the collision sites separated from each other in a plane penetrates the cylindrical body, and both ends of the rod protrude from the cylindrical body toward each collision site, A predetermined clearance is provided between both ends of the rod and each collision site, A displacement suppression device characterized in that when the collision portion collides with the end of the rod and the rod moves inside the cylindrical body in the axial direction of the rod, the collision energy is absorbed by an energy absorption mechanism provided in the cylindrical body.

2. 2. The displacement suppression device according to claim 1, wherein the energy absorbing mechanism absorbs collision energy by friction generated when the rod moves inside the cylindrical body.

3. 2. The displacement suppression device according to claim 1, wherein a buffer body capable of deforming in a horizontal direction perpendicular to the axial direction of the rod is provided at an end of the rod.

4. 4. The displacement suppression device according to claim 3, wherein the shock absorber is a laminated rubber.

5. 2. The displacement suppression device according to claim 1, further comprising an adjustment mechanism provided at an end of the rod for adjusting a distance between the end and the collision site.

6. The displacement suppression device according to claim 1 , wherein the collision site is a part of the object.

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