JP2022099496A - Seismic isolation braking device - Google Patents

Abstract

To provide a seismic isolation braking device capable of reducing an installation cost, having a function to minimize damage to a seismic isolation structure, which is a problem when the seismic isolation structure such as a structure or a bridge moves beyond design assumption, and further capable of exhibiting the same damping effect against external force from either the left or right direction.SOLUTION: A seismic isolation braking device 1 comprises: a dampers 3 provided with an end plate 31 and a mounting member 32 at both ends of an energy absorption member 30; an outer cylinder member 2 in which the damper is installed in a movable manner; and a stopper 20 that is provided on an inner surface near both ends of the outer cylinder member and abuts on the end plate to limit the movement of the damper. The energy absorption member is a member that can absorb energy only when a load is applied in a tensile or compressive direction, and the stopper is provided inside the end plate.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seismic isolation braking device.

Even for seismic isolation structures such as buildings and bridges where seismic isolation devices are installed, if a large-oscillation seismic isolation motion that exceeds the response of the design assumption level occurs, the seismic isolation device will be excessively deformed and the superstructure There is a concern that the seismic isolation function may not be fully exerted due to an object colliding with a retaining wall or the like. Regarding this point, the "Seismic Isolation Structure Design Guideline" of the Japan Society for Architecture states that the basic concept of seismic isolation structure design is to be safe against damage to the seismic isolation structure that may occur when a large-aperture seismic motion occurs. It has been shown to actively secure a margin and request consideration of fail-safe.

On the other hand, a spring-type seismic damping damper capable of damping control, which is used to suppress excessive deformation of the seismic isolation layer in the seismic isolation structure, has been proposed (see Patent Documents 1 and 2). These proposed spring-type seismic dampers absorb seismic energy by expanding and contracting in one direction when excessive deformation occurs in the seismic isolation layer, and suppresses excessive deformation of the seismic isolation layer.

Japanese Patent No. 6613443 Japanese Patent No. 6694195

However, since the spring-type vibration damping dampers of Patent Documents 1 and 2 absorb seismic energy by the elastic reaction force generated by the compression of the expansion and contraction portion, at least two dampers are installed in the seismic isolation layer. It is necessary to install the spring type seismic damper so as to face each other, which causes a problem that the installation cost is high and the installation place is expanded.

The present invention has been made in view of the above circumstances, and the installation cost can be kept low, and when the seismic isolation structure such as a building or a bridge is deformed beyond the design assumption. To provide a seismic isolation braking device that has the function of minimizing damage to the structure, which is a problem, and can exert the same braking effect against external forces from both tensile and compressive directions. That is the issue.

The seismic isolation braking device of the present invention has been made to solve the above technical problems, and is characterized by the following.

First, the seismic isolation braking device of the present invention includes a damper provided with end plates and mounting members at both ends of the energy absorbing member, an outer cylinder member in which the damper is movablely installed, and the outer cylinder member. The inner surface near both ends is provided with a stopper that comes into contact with the end plate and restricts the movement of the damper. The energy absorbing member is an energy absorbing member that acts during tension, and the stopper is provided inside the end plate. It is characterized by being.
Secondly, in the seismic isolation braking device of the first invention, the energy absorbing member of the damper is a coil spring, and a dimension smaller than the circumferential dimension of the central space is constrained in the central space of the coil spring. When the material is internally installed and an external force is applied outward in the axial direction at both ends of the coil spring and the coil spring is squeezed and the inner diameter is slightly deformed, the inner diameter of the coil spring is increased by a certain amount or more due to the internally installed restraining material. It is preferable that the damper is small and does not deform.
Thirdly, it is preferable that the seismic isolation braking device of the second invention is provided with a twist prevention mechanism for preventing the occurrence of twist due to the elongation of the coil spring.
Fourth, the seismic isolation braking device of the present invention includes a damper provided with end plates and mounting members at both ends of the energy absorbing member, an outer cylinder member in which the damper is movablely installed, and the outer cylinder member. The inner surface near both ends is provided with a stopper that comes into contact with the end plate to limit the movement of the damper, the energy absorbing member is an energy absorbing member that acts during compression, and the stopper is provided on the outside of the end plate. It is characterized by being.
Fifth, in the seismic isolation braking device of the first to fourth inventions, it is preferable that the energy absorbing member is a coil spring in which a wire having a rectangular cross section is spirally wound.
Sixth, in the seismic isolation braking device of the first to fourth inventions, it is preferable that the energy absorbing member is a coil spring in which a spiral slit is formed in a steel pipe material.
Seventh, in the seismic isolation braking device of the first to sixth inventions, the seismic isolation braking device is installed on a turntable fixed to a pedestal, and the mounting members and structures at both ends are connected to each other. It is preferable that they are connected via.

According to the seismic isolation braking device of the present invention, the number of installation units can be reduced, the installation cost can be kept low, and the seismic isolation structure such as a building or a bridge receives an external force such as an earthquake motion, and is assumed in design. Even if it moves beyond the above, it is possible to prevent the collision of the retaining wall of the seismic isolation layer of the seismic isolation structure and the fall of the bridge girder in the bridge, and the damage to the structure can be minimized. In addition, it is possible to exert the same damping effect against an external force from either the left or right direction.

It is a schematic cross-sectional view which shows the operation state of the embodiment of the seismic isolation braking device of this invention, (A) shows the static state, (B) shows the state pulled from the left direction, (C) shows from the right direction. It shows the pulled state. (A) and (B) are schematic views showing an embodiment of a stopper, and (C) is an axial schematic diagram of a seismic isolation braking device to which the stoppers of (A) and (B) are attached. (A) is a schematic cross-sectional view showing an embodiment of the damper of the present invention, and (b) is a schematic perspective view of this embodiment. It is a graph which shows the relationship between the axial force and the axial displacement of the damper shown in FIG. It is a schematic cross-sectional view which shows the operating state of another embodiment of the seismic isolation braking device of this invention, (A) shows the stationary state, (B) shows the state pushed from the left direction, (C) is right. It shows the state of being pushed from the direction. It is a schematic diagram which shows the structure which installed the shock absorber of this invention between a pedestal of the foundation of a building provided with a seismic isolation device, and an upper building. It is a schematic diagram which shows the state which the seismic isolation braking device of this invention is installed on a turntable, (a) is a schematic side view, and (b) is a schematic upper surface.

The seismic isolation braking device of the present invention includes a damper provided with end plates and mounting members at both ends of the energy absorbing member, an outer cylinder member in which the damper is movablely installed, and an inner surface near both ends of the outer cylinder member. It is equipped with a stopper that comes into contact with the end plate and restricts the movement of the damper. Further, as the energy absorbing member of the damper, either an energy absorbing member acting at the time of compression or an energy absorbing member acting at the time of tension is selectively used. The energy absorbing member acting at the time of tension in the present invention means, for example, a spring having a relatively small pitch when a spring is used as the energy absorbing member and exhibiting elasto-plastic deformation that repels when the spring is extended. The energy absorbing member acting during compression in the present invention means a spring having a relatively large pitch and exhibiting elasto-plastic deformation that repels when the spring contracts.

Hereinafter, embodiments of the seismic isolation braking device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an operating state of an embodiment of the seismic isolation braking device of the present invention. In the seismic isolation braking device 1 of the embodiment shown in FIG. 1, an energy absorbing member 30 that acts during tension is used as the energy absorbing member 30 of the damper 3. A flange-shaped end plate 31 having a larger spring diameter is connected to both ends of the energy absorbing member 30, and a mounting member 32 is provided at the center of the end plate 31. Further, the damper 3 having the above configuration is movably installed inside the outer cylinder member 2 having both ends open, and is inside the end plate 31 provided on the damper 3 on the inner surface of the outer cylinder member 2. A stopper 20 is provided.

The damper 3 of the seismic isolation braking device 1 of the embodiment shown in FIG. 1 uses a plate-shaped steel material spirally wound with a constant inner diameter as the energy absorbing member 30. The energy absorbing member 30 in the damper 3 of the seismic isolation braking device 1 is not limited to the energy absorbing member 30 as long as it has the ability to absorb the input kinetic energy, and includes coil springs, leaf springs, viscoelastic bodies and the like. Can be used. Further, the diameter and length of the energy absorbing member 30 and the elasto-plastic deformation can be appropriately determined according to the size of the structure to be installed and the size of the assumed seismic motion.

The shape of the outer cylinder member 2 in which the damper 3 is installed is not particularly limited as long as the damper 3 can be stably and movablely installed. For example, a shape having a rectangular cross section or a circular tubular shape can be exemplified. Considering that the 20 is arranged at a predetermined position, it is desirable to have a rectangular cross-section as shown in FIG. 2 from the viewpoint of workability and the like. Further, the material of the outer cylinder member 2 is not particularly limited as long as it is fixed to the base or the structure and has the strength to withstand the expansion and contraction of the damper 3, and for example, steel or high-strength resin is used. be able to.

In the seismic isolation braking device 1 of the present invention, the stopper 20 for controlling the movement of the damper 3 when an external force is applied is provided at a predetermined position inside the end plate 31, but the damper 3 is usually used as an outer cylinder member. It becomes difficult to dispose the stopper 20 inside the end plate 31 after installing the stopper 20 internally. Therefore, it is preferable that the stopper 20 is configured so that the damper 3 can be disposed from the outside of the outer cylinder member 2 after the damper 3 is introduced into the outer cylinder member 2. Specifically, for example, a slit penetrating to the inside of the outer cylinder member 2 is provided at a predetermined position inside the end plate 31 in a state where the damper 3 is inserted into the outer cylinder member 2, and the slit is provided. The convex stopper 20 shown in FIGS. 2A and 2B can be fitted as shown in FIG. 2C and fixed to the outer cylinder member 2 by a bolt 21 or the like. With the above configuration, after the stopper 20 is arranged inside the end plate 31, the stopper 20 can be easily and surely arranged. The material of the stopper 20 is not particularly limited as long as the movement of the damper 3 can be reliably controlled, and the same material as the outer cylinder member 2 can be used.

The operation of the seismic isolation braking device 1 of the above embodiment is as shown in FIG. 1 (B) from the stationary state shown in FIG. 1 (A) when the damper is pulled from the left side in the direction of the arrow by an external force such as a seismic motion. The inner surface of the end plate 31 at the right end of 3 comes into contact with the stopper 20 on the right side of the outer cylinder member 2 to prevent the damper 3 from moving, but the damper 3 extends and the inside of the end plate 31 at the left end of the damper 3 The side surface is separated from the stopper 20 on the left side of the outer cylinder member 2. At this time, the force applied to the seismic isolation braking device 1 in the direction of the arrow from the left side is absorbed by the elasto-plastic deformation of the energy absorbing member 30 acting during tensioning. The dimension from the stopper 20 to the open end of the outer cylinder member 2 is determined in consideration of the amount of deformation of the damper 3 so that the damper 3 does not fall off from the open end of the outer cylinder member 2 when the damper 3 is extended. ..

On the contrary, when the damper 3 is pulled from the right side in the arrow direction by an external force such as a seismic motion as shown in FIG. 1 (C) from the stationary state shown in FIG. 1 (A), the left end of the damper 3 is used. The inner surface of the end plate 31 in contact with the stopper 20 on the left side of the outer cylinder member 2 to prevent the damper 3 from moving, but the damper 3 extends and the inner surface of the end plate 31 at the right end of the damper 3 is the outer cylinder. Move away from the stopper 20 on the right side of the member 2. At this time, the force applied to the seismic isolation braking device 1 in the direction of the arrow from the right is absorbed by the elasto-plastic deformation of the energy absorbing member 30 acting at the time of tension.

That is, according to the seismic isolation braking device 1 of the present embodiment, the force applied to the structure due to the elasto-plastic deformation of the energy absorbing member 30 is equally absorbed by the external force pulled from either the left or right by one damper 3. Is possible.

Further, in the seismic isolation braking device 1 of the present invention, as a damper 3 using the energy absorbing member 30 that acts at the time of tension, the central space of the coil spring 30 as the energy absorbing member is measured from the circumferential dimension of the central space. It is also possible to use a damper 3 in which a restraining material having a small size is provided internally and an end plate 31 and a mounting member 32 are provided at both ends of the coil spring 30.

Hereinafter, the damper 3 of the above embodiment will be described in detail with reference to the drawings. FIG. 3A is a schematic front sectional view showing the configuration of an embodiment of the damper 3 used in the seismic isolation braking device 1 of the present invention, and FIG. 3B is a schematic perspective view thereof.

In the damper 3 of the embodiment shown in FIG. 3, a plate-shaped steel material is spirally wound with a constant inner diameter as the coil spring 30. That is, the cross section of the spring wire of the coil spring 30 has a rectangular shape. Further, the type of steel material can be used without limitation as long as it is a steel material having appropriate elasticity used for ordinary springs. For example, low carbon steel, high carbon steel which is a spring steel (hot material), silicon manganese. Examples thereof include steel, manganese chrome steel, chrome vanadium steel, manganese chrome boron steel, silicon chrome steel, chrome molybdenum steel, and stainless steel.

Further, the width and the number of turns of the steel material constituting the coil spring 30 can be appropriately set according to the material and characteristics of the steel material to be used, the size of the structure to be attached, and the required braking performance, and are particularly limited. Although it is not a thing, it is preferable to use a rectangular steel material having a wide cross section in order to increase the energy absorption capacity. Specifically, as a setting for exhibiting sufficient braking performance, it is desirable that the width-diameter ratio (spring diameter / wire width) of the rectangular shape of the steel cross section is in the range of about 0.5 to 1.

Further, the coil spring 30 can be manufactured by winding the above steel material in a spiral shape, or by forming slit-shaped cuts at regular intervals around the cylindrical steel pipe material in a spiral shape. According to the method for manufacturing the coil spring 30 that forms a spiral notch in the steel pipe material, desired spring characteristics can be realized by adjusting the angle and width of the notch formed in the steel pipe material. Further, by partially changing the angle of the spiral portion, the elasticity of a specific position can be changed, and the range of application in design can be widened. Further, since the coil spring 30 can be formed only on an arbitrary portion of the steel pipe material and can be formed into a cylindrical shape with both ends closed, it is preferable from the viewpoint of expandability and workability of the application. In addition, the processing yield is increased and the production can be automated, so that mass production becomes possible.

In the damper 3 of the present embodiment, a restraining material having a dimension smaller than the circumferential dimension of the central space of the coil spring 30 is internally provided, and a specific distance is provided between the inner surface of the coil spring 30 and the restraining material. It is formed. As shown in FIG. 3, the restraint material is internally installed in the damper of the present embodiment so that the restraint material is simply placed in the internal space of the coil spring 30, but it is longitudinally arranged in the central space of the coil spring 30. One end of the restraint material 34 inserted in parallel with respect to the direction may be fixedly arranged on the end plate 31.

The material of the restraining material 34 is not particularly limited as long as it has a strength capable of preventing deformation of the inner diameter of the coil spring 30, and for example, steel material, non-ferrous metal, engineering plastic, FRP, hard rubber and the like can be used.

The shape of the restraining material 34 is not particularly limited, and a cylinder, a cylinder, a polygonal pillar, or the like can be used. When using a polygonal column, it is preferable to use one with chamfered corners in order to increase the contact area with the inside of the coil spring 30. This is because when the coil spring 30 is entangled with the restraining material 34, if it comes into contact with a sharp corner portion of the restraining material 34, the yield strength of the coil spring 30 may decrease.

Further, at both ends of the coil spring 30, end plates 31 having a diameter larger than the diameter of the coil spring 30 and having a size that can be internally installed in the outer cylinder member 2 are provided, and the end plate 31 is provided with a seismic isolation braking device 1 as a structure. A mounting member 32 for mounting is provided.

The operation of the seismic isolation braking device 1 using the damper 3 of the above embodiment will be described as follows. When the damper 3 using a normal coil spring is extended outward in the axial direction at both ends by an external force, the coil spring is squeezed and the inner diameter is greatly deformed. As described above, when an external force continues to be applied to the coil spring, the coil spring continues to extend in the long axis direction in a squeezed state, and the coil spring may eventually break.

On the other hand, in the seismic isolation braking device 1 using the damper 3 of the present embodiment, when an external force is applied outward in the direction of both ends of the coil spring 30 and the coil spring 30 is squeezed and the inner diameter is small and deformed, the inside of the coil spring 30 is inside. Due to the restraint material 34 provided, the inner diameter of the coil spring 30 is not deformed below the diameter of the restraint material 34.

That is, until the coil spring 30 is squeezed and deformed to have a small inner diameter and the inside of the coil spring 30 comes into contact with the restraining material 34, it functions as an energy absorbing member 30 that acts during tension, and receives axial force when it comes into contact with the restraining material 34. When the coil spring 30 is wound around the material 34 and the deformation of the coil spring 30 is restrained, the rigidity and strength of the entire seismic isolation braking device 1 increase.

The distance between the restraining material 34 internally provided in the central space of the coil spring 30 and the inside of the coil spring 30 affects the load of the external force applied to the seismic isolation braking device 1 and the deformation relationship of the coil spring 30. This interval can be adjusted by changing the inner diameter of the coil spring 30 and by changing the diameter (thickness) of the restraining material 34. That is, by appropriately setting the diameter of the restraining material 34, the elongation amount of the coil spring 30, that is, the braking performance of the seismic isolation braking device 1 can be determined.

FIG. 4 shows a graph of the relationship between the axial force and the axial displacement of the seismic isolation braking device 1 shown in FIG. In the graph of FIG. 4, the solid line shows the characteristics of the seismic isolation braking device 1 of the present invention, and the broken line shows the characteristics of a normal coil spring.

According to this graph, the axial force-axial displacement characteristic (solid line) of the seismic isolation braking device 1 of the present embodiment has a small rigidity at the initial stage and a gradual increase in rigidity, and the rigidity is gradually increased with respect to an input of a specific energy or more. Has developed a predetermined yield strength. As a result, it can be seen that the transmission of a shocking load due to the sudden restraint of the displacement of the structure is suppressed.

The coil spring 30 is subjected to an external force outward in the axial direction, and as the deformation in the axial direction increases, the spring body is twisted, the coil spring 30 and the restraint member 34 slip without sufficient contact, and the load of the coil spring 30 increases. Since there is a possibility that the deformation due to plasticization will increase and the braking device will not work, a twist prevention mechanism for preventing the occurrence of twisting of the coil spring 30 beyond a predetermined value can be provided.

As described above, in the seismic isolation braking device 1 using the damper 3 of the above embodiment, the steel material having a rectangular cross section of the coil spring 30 is shear yielded in the process of increasing the load and rigidity while the coil spring 30 is wound around the restraining material 34. Absorb energy. That is, a braking effect is exhibited up to a certain movement dimension due to shaking on a structure generated in excess of the seismic isolation allowance of the seismic isolation device, and functions as a stopper 20 after the inner surface of the coil spring 30 and the restraining material 34 come into contact with each other. .. Further, when the seismic isolation braking device 1 using the damper 3 of the present embodiment is used for the seismic isolation building, it functions as a collision prevention member between the seismic isolation building and other structures while withstanding a plurality of impacts. The seismic isolation braking device 1 can reliably absorb energy exceeding the design assumed level that acts on the seismic isolation layer.

Further, in the seismic isolation braking device 1 of the present invention, as shown in FIG. 5, the stopper 20 may be provided on the outside of the end plate 31 as the energy absorbing member 30 that acts when the damper 3 is compressed. .. The size of the seismic isolation braking device 1, the material of each member, and the like can be the same as those of the seismic isolation braking device 1 shown in FIG.

Hereinafter, the operation of the seismic isolation braking device 1 of the embodiment in which the energy absorbing member 30 of the damper 3 is used as the energy absorbing member 30 acting at the time of compression will be described with reference to the drawings. The operation of the seismic isolation braking device 1 of the present embodiment is as shown in FIG. 5 (B) from the stationary state shown in FIG. 5 (A) when the damper 3 is pushed in the direction of the arrow from the left side due to seismic motion or the like. The outer surface of the right end plate 31 comes into contact with the stopper 20 on the right side of the outer cylinder member 2 to prevent the damper 3 from moving, and the damper 3 of the energy absorbing member 30 acting during compression shrinks, so that the left end of the damper 3 ends. The outer surface of the end plate 31 is separated from the stopper 20 on the left side of the outer cylinder member 2. At this time, the force applied to the seismic isolation braking device 1 from the left side in the direction of the arrow is absorbed by the elasto-plastic deformation of the damper 3 of the energy absorbing member 30 acting during compression.

On the contrary, when the static state shown in FIG. 5A is pushed in the direction of the arrow from the right side due to a seismic motion or the like as shown in FIG. 5C, the end of the left end of the damper 3 is reached. The outer surface of the plate 31 comes into contact with the stopper 20 on the left side of the outer cylinder member 2 to prevent the damper 3 from moving, the damper 3 of the energy absorbing member 30 acting during compression shrinks, and the end plate 31 at the right end of the damper 3 The outer surface of the outer cylinder member 2 is separated from the right stopper 20 of the outer cylinder member 2. At this time, the force applied to the seismic isolation braking device 1 from the right side in the direction of the arrow is absorbed by the elasto-plastic deformation of the damper 3 of the energy absorbing member 30 acting during compression.

That is, according to the seismic isolation braking device 1 of the present embodiment, it is possible to equally absorb the force applied to the structure by the elasto-plastic deformation of the damper 3 against the external force pushed from either the left or right by one damper 3. It becomes.

When the seismic isolation braking device 1 of the present invention is installed in a building in which the seismic isolation device is installed, as shown in FIG. 6, the seismic isolation braking device 1 is fixed to the pedestal 63 of the foundation of the building and the mounting members 32 provided at both ends. And the upper building are connected via the connecting member 4. The connecting member 4 is not particularly limited as long as it can join the seismic isolation braking device 1 of the present invention and the building which is a structure. For example, a wire, a chain, a rope, a pantograph type joining member, or the like. Can be exemplified. Further, these lengths can be appropriately set according to the performance, range of motion, etc. of the seismic isolation device installed in the seismic isolation structure. As the structure in the present invention, in addition to the above-mentioned building, a bridge or the like in which a movable bearing or a seismic isolation device is installed between a pier and a bridge girder can be exemplified.

When connecting the pier and the bridge girder using the seismic isolation braking device 1 of the present invention, it is necessary to set the maximum extension width of the seismic isolation braking device 1 in consideration of the movement allowable range of the bridge girder with respect to the movable bearing. This makes it possible to reliably prevent the collapse of the bridge girder due to earthquake motion. As described above, according to the seismic isolation braking device 1 of the present invention, it is possible to suppress excessive displacement of a structure that moves largely horizontally, such as a seismic isolation building or a bridge, and prevent collision or fall. Further, since the seismic isolation braking device 1 of the present invention can exert the same braking effect against an external force from either the left or right side, the number of installed units can be reduced and the cost can be kept low.

When fixing the seismic isolation braking device 1 of the present invention to the pedestal 63 of the structure, as shown in FIG. 7, a turntable 7 is installed on the pedestal 63, and the seismic isolation braking device 1 is attached to the turntable 7. Can be fixed, and the mounting member of the seismic isolation braking device 1 and the structure can be connected via the connecting member 4.

With the above installation configuration, the turntable 7 rotates in the plane direction following the direction of the seismic motion, and the seismic isolation braking device 1 can be operated while responding to the movement in the XY direction, from any direction. The seismic isolation braking device 1 can be used even for complicated seismic motion.

1 Seismic isolation braking device 2 Outer cylinder member 20 Stopper 3 Damper 30 Energy absorption member (coil spring)
31 End plate 32 Mounting member 34 Restraint material 35 Interval 36 Twist prevention mechanism 37 Twist prevention mechanism 4 Connection member 5 Seismic isolation device 6 Structure 61 Foundation 62 Superstructure 63 Pedestal 7 Turntable

Claims (7)

A damper provided with end plates and mounting members at both ends of the energy absorbing member, an outer cylinder member in which the damper is movably installed, and an inner surface near both ends of the outer cylinder member are in contact with the end plate. Equipped with a stopper that restricts the movement of the damper,
A seismic isolation braking device characterized in that the energy absorbing member is an energy absorbing member that acts during tension, and the stopper is provided inside the end plate. The energy absorbing member of the damper is a coil spring, and a restraining material having a dimension smaller than the circumferential dimension of the central space is internally provided in the central space of the coil spring, and the coil spring is outward in the axial direction at both ends. The damper according to claim 1, wherein when an external force is applied to the coil spring and the coil spring is squeezed and the inner diameter is deformed to be small, the inner diameter of the coil spring is small to a certain extent or more and is not deformed by the internally installed restraining material. Seismic isolation braking device. The seismic isolation braking device according to claim 2, further comprising a twist prevention mechanism for preventing the occurrence of twist due to the elongation of the coil spring. A damper provided with end plates and mounting members at both ends of the energy absorbing member, an outer cylinder member in which the damper is movably installed, and an inner surface near both ends of the outer cylinder member are in contact with the end plate. Equipped with a stopper that restricts the movement of the damper,
A seismic isolation braking device characterized in that the energy absorbing member is an energy absorbing member that acts during compression, and the stopper is provided on the outside of the end plate. The seismic isolation braking device according to any one of claims 1 to 4, wherein the energy absorbing member is a coil spring in which a wire having a rectangular cross section is spirally wound. The seismic isolation braking device according to any one of claims 1 to 4, wherein the energy absorbing member is a coil spring having a spiral slit formed in a steel pipe material. Any of claims 1 to 6, wherein the seismic isolation braking device is installed on a turntable fixed to a pedestal, and the mounting members at both ends and a structure are connected via a connecting member. The seismic isolation braking device described in item 1.

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