JP2001173267A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device having fire resisting performance and excessive horizontal displacement preventive performance, easy to construct and excellent in design property. SOLUTION: This base isolation device 1 to be interposed between a substructure 101 and a superstructure 102 comprises a base isolation means 15 for supporting the superstructure 102 in the state movable to the substructure 101 and moderating the seismic force transmitted from the substructure 101 to the superstructure 102; a connecting member 21 for connecting the substructure 101 to the superstructure 102; and a fire resisting outer shell member 60 for covering the base isolation means 15 and the connecting member 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic isolation device interposed between an upper structure and a lower structure, and more particularly to a seismic isolation device having fire resistance and excessive horizontal displacement prevention performance.

[0002]

2. Description of the Related Art In a base-isolated building provided with a base-isolation device in a middle layer of the building, when the base-isolation device is damaged by a fire, the axial support performance of the base-isolation device is not impaired. Therefore, it is necessary to apply fireproof coating to the seismic isolation device. Also,
In a seismic isolation building with a seismic isolation device installed in the middle layer of the building, if a damper or the like is installed in a different place from the seismic isolation device, the floor plan of the building is restricted, so the It is desirable to have horizontal displacement prevention performance.

[0003] For such a purpose, a seismic isolation device having a fireproof performance and an excessive horizontal displacement prevention performance has been proposed, for example, one disclosed in Japanese Patent Application Laid-Open No. 10-169248.

[0004]

In this prior art, excessive horizontal displacement prevention performance is achieved by a stopper formed by engaging locking members provided on each of an upper structure and a lower structure of a building with each other. Has been realized. However, since the structure of the stopper is complicated, there is a problem in that manufacturing and construction of the seismic isolation device are costly. In addition, in order to follow the deformation of the seismic isolation device, the fire-resistant coating of the seismic isolation device is conventionally provided with a sheet-like fire-resistant coating material that is bent and wound around the outer periphery of the seismic isolation device, or surrounds the seismic isolation device. In this case, an annular refractory coating material is vertically slidably stacked on each other. However, the former has a poor appearance because the sheet is bent. In the latter case, residual displacement occurs between the refractory coatings laminated after the earthquake. Therefore, the conventional seismic isolation device provided with the fireproof coating has a problem in that the design is inferior, particularly when applied to an intermediate layer or the like whose appearance is easily exposed to human eyes.

In view of the above circumstances, an object of the present invention is to provide a seismic isolation device which has fire resistance and excessive horizontal displacement prevention, has a simple structure, and is excellent in design.

[0006]

In order to solve the above problems, a seismic isolation device according to claim 1 (for example, FIG. 2, FIG. 8, FIG.
2 to 15) are provided in the seismic isolation devices 1, 4, 8 to 11 interposed between the lower structure (column lower part) 101 and the upper structure (column upper part) 102. A seismic isolation means 15 for supporting the upper structure 102 in a movable state with respect to the upper structure 102 and reducing seismic force transmitted from the lower structure 101 to the upper structure 102;
1 and the upper structure 102, and the lower structure 10
When the relative displacement between the first member 1 and the upper structure 102 reaches a predetermined amount, a connecting member (chain) 2 for restricting further displacement.
1, (rope) 24, (bar) 29, (damper) 30
And the seismic isolation means 15 and the connecting members 21, 24, 29, 3
And an outer shell material 60 having a fire resistance, which covers the outer periphery of the base member 0 and can follow the deformation of the seismic isolation means 15.

According to the first aspect of the present invention, there is provided a connecting member for connecting the lower structure and the upper structure, and the relative displacement between the lower structure and the upper structure is set to a predetermined amount. When reaching, the relative displacement between the lower structure and the upper structure can be restricted from further increasing due to the tension of the connecting member. Therefore, with a simple structure, the seismic isolation device can have an excessive horizontal displacement prevention performance. Further, the outer shell material can add fire resistance to the seismic isolation device. Therefore, when the seismic isolation device is applied to a middle layer of a building or the like, the outer shell material can follow the deformation of the seismic isolation means. Performance can be imparted.

The seismic isolation device according to claim 2 (for example, see FIGS. 2, 8 and 9) is the same as that of claim 1,
Reference numerals 1 and 24 are characterized by being made of a flexible linear body.

Here, as the flexible striated body, a chain, a rope made of a fiber having a high strength such as a synthetic fiber, a carbon fiber, a glass fiber, or a natural fiber is used. As the synthetic fibers, those made of aramid / polyamide / polyester / polyvinyl alcohol are used.

According to the seismic isolation device of the second aspect, the same effect as that of the first aspect is obtained, and the connecting member is
In the normal state in which the seismic isolation means is not deformed, the seismic isolation means is housed in the seismic isolation device in a bent state, and the lower structure and the upper structure When a relative displacement occurs between the structure and the structure, the bending of the striated body is eliminated and the connecting member exerts a tension, so that the relative displacement between the lower structure and the upper structure can be restricted from further increasing. Therefore, the connecting member can be capable of following the relative displacement between the lower structure and the upper structure.

The seismic isolation device according to claim 3 (for example, see FIGS. 3, 8, 9, and 15) is characterized in that in claim 1 or 2,
The connecting members 21, 24, 30 have buffer means 23, 25,
28 and 31 are provided.

According to the third aspect of the present invention, the same effect as in the first or second aspect is obtained, and the connecting member is provided with the buffer means. When a shock is applied, a part of the impact force received by the connecting member is absorbed by the buffer means, and the impact force can be reduced.

According to a fourth aspect of the present invention, there is provided a seismic isolation device according to any one of the first to third aspects, wherein both ends of the connecting members 24, 29, and 30 are connected to the lower part. The universal joints 41, 4 are attached to the structure 101 or the upper structure 102.
It is characterized by being attached via 5-48.

According to the seismic isolation device of the fourth aspect, the same effect as any of the first to third aspects can be obtained,
Since both ends of the connecting member are attached to the lower structure or the upper structure via a universal joint, when the relative displacement between the lower structure and the upper structure fluctuates, the relative displacement In accordance with the change in the direction and the size of the connection member, the connection angle of both ends of the connecting member to the lower structure or the upper structure can be made to follow any direction and angle.

The seismic isolation device according to claim 5 (see, for example, FIGS. 8 to 14) is the same as that of claim 4,
47 are provided with buffer means 49a, 49b, 50-55.

According to the seismic isolation device of the fifth aspect, the same effect as that of the fourth aspect is obtained, and both ends of the connecting member are connected to the lower structure or the upper structure via a universal joint. Since the universal joint is provided with buffer means, when the seismic force is applied to the seismic isolation device, a part of the impact force received by the connecting member is absorbed by the buffer means, Can be alleviated.

According to a sixth aspect of the present invention, there is provided a seismic isolation device according to any one of the first to fifth aspects, wherein the outer shell members 60 are vertically stacked and mutually horizontal. It is composed of a slidable annular body 61 and a refractory material 62 covering the outer periphery of the annular body 61, and the annular bodies 61 are connected to each other by elastic bodies 73.

According to the seismic isolation device of the sixth aspect, the same effect as any one of the first to fifth aspects can be obtained,
The outer shell material is composed of an annular body vertically stacked and slidable in a horizontal direction with respect to each other, and a refractory material covering the outer periphery of the annular body, and the annular bodies are connected to each other by an elastic body. Therefore, a restoring force is applied between the annular bodies.
Therefore, after the earthquake, there is no residual displacement between the stacked annular members, and the seismic isolation device is excellent in design.

The seismic isolation device 1 according to claim 7 (see, for example, FIG. 4) is characterized in that, in claim 6, a sliding bearing (caster) 74 is interposed between the annular bodies 61. And

According to the seismic isolation device of the seventh aspect, the same effect as in the sixth aspect is obtained, and the sliding bearing is interposed between the annular bodies, so that the annular bodies can be separated from each other. Is reduced. Therefore, following the deformation of the seismic isolation means, the space between the annular bodies moves smoothly. Further, after the earthquake, a residual displacement due to the frictional resistance does not occur between the stacked annular members, and the seismic isolation device is excellent in design.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a seismic isolation device of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a plan sectional view showing a seismic isolation device of the present embodiment, and FIG. 2 is a longitudinal sectional view of the same.

The seismic isolation device 1 of the present embodiment is interposed between a column lower part (lower structure) 101 and a column upper part (upper structure) 102 of a specific intermediate layer of a building. ,
The upper column 10 is movable with respect to the lower column 101.
2 and a seismic isolation means 15 for reducing the seismic force transmitted from the lower column 101 to the upper column 102, connecting the lower column 101 to the upper column 102, and connecting the lower column 101 to the upper column 102. When the relative displacement reaches a predetermined amount, the chain (connecting material) 21 for restricting further displacement, the seismic isolation means 15 and the outer periphery of the chain 21 are covered, and can follow the deformation of the seismic isolation means 15 , Shell material 6 with fire resistance
0 is provided, and is schematically configured.

First, the pillar lower part 101 and the pillar upper part 102
Are fixed to the lower and upper flanges (not shown) of the seismic isolation means 15 made of laminated rubber or the like.

Next, the lower end 101 and the upper end 102 of the chain 21 are arranged such that one end and the other end of the chain 21 are at the same position in plan view in a normal state where the seismic isolation means 15 is not deformed. Then, it is attached. A plurality of chains 21,... Are similarly attached between the lower column 101 and the upper column 102,
Are formed to have the same size as each other. This dimension is such that the chains 21,... Have a certain flexure in normal times when the seismic isolation means 15 is not deformed, and when the horizontal displacement occurs between the column lower part 101 and the column upper part 102 during an earthquake. The length is set so as to limit the deformation of the seismic isolation means 15 to a certain value or less.

As shown in FIG. 3, each chain 21 is formed by combining substantially oval rings 22,. When a tensile force is applied to the chain 21, the inner surfaces 22C of the bent portions of the adjacent rings 22, 22 are pressed against each other. A supporting member 23a made of a leaf spring or the like is provided on the inner surface 22C of the bent portion.
A cushioning material 23b made of rubber or the like is interposed between 3a and the bent portion inner surface 22C, and the entire ring 22 is covered with a coating material 23c made of a synthetic resin having a predetermined elasticity. The buffer means 23 of the chain 21 is configured by a combination of the above-described supporting member 23a, buffer material 23b, and coating material 23c.

Next, the outer shell material 60 is made up of an annular body 61, which is vertically stacked and slidable in the horizontal direction, and a refractory material 62, which covers the outer periphery of the annular body 61,. Are connected to each other by elastic members 73 made of rubber or the like. In order to prevent excessive horizontal displacement between the vertically stacked annular members 61,..., The annular members 61,. good.

Each annular member 61 is provided with a metal member 61a, which is substantially L-shaped in plan view, so as to surround the seismic isolation means 15 from all four sides, and connects the metal members to each other with screws 61b,. It is composed of Are vertically slidably stacked on each other, and cover the outer periphery of the seismic isolation means 15 via an air layer having a predetermined thickness.

Guide portions 61c, which are formed by bending a band-shaped plate material into a semicircle, are provided on the inner surface of each annular body 61, respectively.
... are provided. Here, in a normal state where the seismic isolation means 15 is not deformed, the guide portions 61c,... Of the annular bodies 61,. . An elastic body 73 made of a rod-shaped member having a predetermined elasticity and having a circular cross section, such as rubber, is inserted into the vertically overlapping guide portions 61c.

Furthermore, casters (sliding bearings) 7 for reducing frictional force are provided on the sliding surfaces of the annular bodies 61,.
4, ... are interposed.

Each caster 74 is, as shown in FIG.
Among the annular bodies 61U and 61L vertically adjacent to each other, the elastic body 75 made of rubber or the like is attached to a concave portion 61d provided on a sliding surface that is the upper surface of the lower annular body 61L. The caster 74 is configured by placing a large-diameter steel ball 74b with a plurality of small-diameter steel balls 74c,... Sandwiched on a support portion 74a having a concave surface on the upper side. On a certain sliding surface, the caster 74
Is in contact with the large-diameter steel ball 74b.

When the upper annular body 61U and the lower annular body 61U slide with respect to each other, the upper annular body 6L
The large-diameter steel ball 74b that is in contact with the sliding surface that is the lower surface of 1U rotates. Here, the small-diameter steel balls 74c allow free rotation of the large-diameter steel balls 74b with respect to the support portion 74a, so that the lower annular member 61L and the upper annular member 61U are formed.
It is structured to reduce friction between

As shown in FIG. 4, a concave portion 61e is provided in a portion of the sliding surface, which is the lower surface of the upper annular body 61U, in contact with the large-diameter steel ball 74b. In a normal state where the seismic isolation means 15 is not deformed, the large-diameter steel ball 74b comes into contact with the center of the concave portion 61e. And annular bodies 61U, 61L
Relative displacement occurs between them, and the large-diameter steel ball 74b
As the distance from the center of 1e increases, the vertical compressive force that the large-diameter steel ball 74b receives from the sliding surface that is the lower surface of the upper annular body 61U increases, and the elastic body 75 is compressed. Further, when the relative displacement between the annular bodies 61U and 61L is reduced, the compressive force is reduced. When a relative displacement occurs between the annular bodies 61U and 61L in this manner, a restoring force is generated in a direction to reduce the relative displacement.

A refractory material 62 is mounted on the outer peripheral surface of each of the annular bodies 61,.

The details of the refractory material 62 are shown in FIG. The refractory material 62 is schematically configured such that a refractory member 65 having cushioning properties and a side shell material 68 made of a metal plate are attached to the outer periphery of the annular body 61 with a bracket 71.

The refractory member 65 is made of a rock wool core material 65a having a circular cross section, a ceramic fiber blanket outer shell 65b surrounding the core material 65a, and a refractory skin 65c such as a glass cloth or a refractory nonwoven fabric covering the surface thereof. It is configured. A packing 70 having fire resistance is attached to the side shell material 68.

Then, the refractory materials 62,
The refractory members 65, 6 having cushioning properties provided in 62.
5 are in close contact with each other, and the space between the side shell materials 68, 68 is hermetically sealed by the packing 70.
Has fire resistance performance. The cross-sectional diameter of the refractory member 65 is set to a dimension that ensures a required thickness of the refractory coating even when the refractory members 62, 62 adjacent in the vertical direction are slightly horizontally displaced from each other. .

(Embodiment 2) The seismic isolation device 2 of the present embodiment is such that the refractory material 62 in the seismic isolation device 1 described in Embodiment 1 is replaced by a refractory material 63 shown in FIG. is there.

The refractory material 63 is the seismic isolation device 1 of the first embodiment.
The refractory member 66 provided in the refractory material 63 is formed in an octagonal cross section, unlike the refractory member 65 of the refractory material 62. In the refractory material 66, the contact width between the refractory materials is larger than that of the refractory material 65, so that the refractory coating thickness is sufficiently ensured.

(Embodiment 3) The seismic isolation device 3 of the present embodiment is a fireproof material 62 of the seismic isolation device 1 described in Embodiment 1.
Is replaced by a refractory material 64 shown in FIG.

The refractory material 64 is made of a side shell material 69 made of a metal plate.
However, the refractory members 67 also serve as brackets for attaching the refractory material 64 to the annular body 61, and the upper and lower surfaces of the bracket portion 69a of the side shell material 69 are attached. Here, when a fire occurs outside the seismic isolation device, the bracket 69 a of the side shell member 69 transmits heat to the interior of the seismic isolation device 3, which may become an undesired thermal bridge for the seismic isolation device 3. Therefore, as shown in FIG. 7 (b), the side shell material 69 is provided with holes 69h,... At predetermined intervals in the bracket portion 69a to reduce the heat conduction cross-sectional area and suppress heat conduction. Has become.

As described above, according to the seismic isolation devices 1 to 3 described in any one of the first to third embodiments, the chain 21 that connects the column lower portion 101 and the column upper portion 102 is provided. When the relative displacement between the upper and lower columns 102 reaches a predetermined amount, the tension of the
It is possible to limit the relative displacement between 1 and the column upper portion 102 from further increasing. Therefore, the seismic isolation devices 1 to 3 can have an excessive horizontal displacement prevention performance with a simple structure. Further, the outer shell material 60 can add fire resistance to the seismic isolation devices 1 to 3. Therefore, the seismic isolation devices 1 to 3
Is applied to the middle layer of a building, etc., since the outer shell material 60 can follow the deformation of the seismic isolation means 15, even after an earthquake with a high risk of fire, the seismic isolation devices 1 to 3 have a fireproof performance. Can be provided.

Further, since the chain 21 is a flexible linear body, the seismic isolation device 15 is normally bent in a normal state where the seismic isolation means 15 is not deformed. When a relative displacement occurs between the lower structure 101 and the upper structure 102, the chain 21 does not bend and the chain 21 exerts tension, and the lower structure 101 and the upper structure It is possible to restrict the relative displacement with the body 102 from further increasing. Therefore, the chain 21 can follow the relative displacement between the lower structure 101 and the upper structure 102.

The chain 21 has a buffering means 23
Is provided, when the seismic force is applied to the seismic isolation devices 1 to 3, a part of the impact force received by the chain 21 is absorbed by the buffer means 23, and the impact force can be reduced.

The outer shell member 60 is composed of an annular member 61 vertically stacked and slidable in a horizontal direction with respect to each other, and a refractory material 62 covering the outer periphery of the annular member 61. Are connected to each other by the elastic bodies 73, so that a restoring force is applied between the annular bodies 61,. Therefore, there is no residual displacement between the stacked annular bodies 61 after the earthquake, and the seismic isolation devices 1 to 3 excellent in design can be obtained.

Further, since the casters 74 are interposed between the annular members 61,.
... the frictional resistance between them is reduced. Therefore, following the deformation of the seismic isolation means 15, the annular bodies 61,. Further, after the earthquake, there is no residual displacement caused by the frictional resistance between the stacked annular bodies 61,..., And the seismic isolation devices 1 to 3 having excellent design can be obtained.

(Embodiment 4) FIG. 8A is a longitudinal sectional view showing a seismic isolation device of the present embodiment, and FIG. 8B is a longitudinal sectional view showing an operation of the seismic isolation device. is there.

The seismic isolation device 4 of this embodiment is different from the seismic isolation device 1 of the first embodiment in that
4 has been replaced. 8 (a) and 8
In (b), the illustration of the outer shell material 60 is omitted. The rope 24 is made of a fiber having a high strength such as a synthetic fiber, a carbon fiber, or a glass fiber or a natural fiber, and is formed to have flexibility. As the synthetic fibers, those made of aramid / polyamide / polyester / polyvinyl alcohol are used.

Next, universal joints 41, 41 having the shape shown in FIG. 8 are embedded in the lower column 101 and the upper column 102, respectively. The universal joint 41 includes spherical washers 41a and 41b made of high-strength brass steel or other high-strength alloy, and the like.
A buffer means 49a made of rubber or the like and a buffer means 49b made of a spring or the like are provided. The washers 41a and 41b are slidably overlapped with each other after being coated with a lubricant. Here, the number of the spherical washers provided in the universal joint 41 is not limited to two, and may be one, or three or more washers may be slidably overlapped with each other. Then, the ropes 24 are attached to the universal joints 41, 41, respectively.
So that the one end and the other end are at the same position in a plan view in a normal state where the seismic isolation means 15 is not deformed,
Installed. The pillar lower part 101 and the pillar upper part 102
A plurality of ropes 24,... Are attached in the same manner, and the lengths of the ropes 24,. This dimension is such that when the seismic isolation means 15 is not deformed in a normal state, the ropes 24,... Have a certain flexure, and when a horizontal displacement occurs between the column lower part 101 and the column upper part 102 during an earthquake, The length is set so as to limit the deformation of the seismic isolation means 15 to a certain value or less.

Here, as shown in FIG. 8, the rope 24 is provided with a buffer means 25 made of a spring or the like, which connects two places 24a and 24b on the rope 24. Then, in a normal state where the seismic isolation means 15 is not deformed, as shown in FIG. 8A, the two places 24 a and 24 b on the rope 24 are drawn toward each other by the elastic force of the buffer means 25, The rope 24 is securely housed in the seismic isolation device 4, and at the time of an earthquake, as shown in FIG. 8B, the buffer means 25 is extended so that the rope 24 exerts tension.

(Embodiment 5) In a seismic isolation device 5 of the present embodiment, the universal joint 41 in the seismic isolation device 4 described in Embodiment 4 has the shape shown in FIGS. 9 (a) and 9 (b). Is replaced by a universal joint 42. The universal joint 42
A spherical sliding bearing 42a made of high-strength brass steel or other high-strength alloy or the like, and a cushioning means 50 made of rubber for absorbing a part of the impact force applied to the rope 24 are provided. The agent has been applied. 42b is a rotating shaft.

(Embodiment 6) A seismic isolation device 6 of the present embodiment is obtained by replacing the universal joint 41 of the seismic isolation device 4 of Embodiment 4 with a universal joint 43 having a shape shown in FIG. It is. The universal joint 43 includes spherical sliding bearings 43a and 43b made of high-strength brass steel or another high-strength alloy.
And a cushioning means 51 made of rubber for absorbing a part of the impact force received by the rope 24.
A lubricant is applied to a and 43b.

(Embodiment 7) The seismic isolation device 7 of the present embodiment is obtained by replacing the universal joint 41 of the seismic isolation device 4 of Embodiment 4 with a universal joint 44 having a shape shown in FIG. It is. The universal joint 44 includes a spherical sliding bearing 44a made of high-strength brass steel or other high-strength alloy, and a buffer means 52 made of rubber that absorbs a part of the impact force received by the rope 24. A lubricant is applied to 44a.

(Eighth Embodiment) FIG. 12A is a longitudinal sectional view showing a seismic isolation device of the present embodiment, and FIG.
FIG. 2 is a longitudinal sectional view showing the operation of the seismic isolation device.

In the seismic isolation device 8 of the present embodiment, the universal joint 41 of the seismic isolation device 4 of the fourth embodiment is replaced with a universal joint 45 having a shape shown in FIG.
12 (a) and 12 (b), the illustration of the outer shell material 60 is omitted.

Next, the universal joints 45 are attached to the column lower part 101 and the column upper part 102, respectively. The universal joint 45 includes a rotating shaft 45a that rotates in a horizontal plane.
A rotating shaft 45 b rotating in a vertical plane;
It is provided with. One end and the other end of the rope 24 are connected to the universal joints 45 via the socket 26 in a normal state where the seismic isolation means 15 is not deformed. Installed. A plurality of ropes 24,... Are similarly attached between the column lower part 101 and the column upper part 102, and the lengths of the ropes 24,. This dimension is such that when the seismic isolation means 15 is not deformed in a normal state, the ropes 24,... Have a certain flexure, and when a horizontal displacement occurs between the column lower part 101 and the column upper part 102 during an earthquake, The length is set so as to limit the deformation of the seismic isolation means 15 to a certain value or less. As long as the universal joint 45 has a predetermined rotation performance, a ring fixed to the end of the socket 26 includes a pillar lower part 101 and a pillar upper part 1.
It may be configured to pass through a ring fixed to 02. A buffering means 53 is provided on the inner surface of the ring where these rings come into contact with each other.

Here, as shown in FIG. 12, the rope 24 is inserted through a collision prevention ring 27, and the collision prevention ring 27 is mounted on the sockets 26, 26 by buffer means 28, 28 made of springs or the like. Two places 26a, 26b
It is connected to. Then, in a normal state where the seismic isolation means 15 is not deformed, as shown in FIG.
With the upper two places 26a and 26b pulled toward each other, the bent rope 24 is securely stored in the collision prevention ring 27, and at the time of an earthquake, as shown in FIG. 28 is extended so that the rope 24 exerts tension.

As described above, according to the seismic isolation device 4 to 8 described in any of the above embodiments 4 to 8, the rope 24 connecting the column lower part 101 and the column upper part 102 is provided. When the relative displacement between the lower portion 101 and the column upper portion 102 reaches a predetermined amount, the relative displacement between the column lower portion 101 and the column upper portion 102 can be restricted from being further increased by the tension of the rope 24. Therefore, with a simple structure, the seismic isolation device 4 ~
8 can have an excessive horizontal displacement prevention performance.
Further, the outer shell material 60 can add fire resistance to the seismic isolation devices 4 to 8. Therefore, the seismic isolation devices 4 to
When 8 is applied to a middle layer of a building or the like, since the outer shell material 60 can follow the deformation of the seismic isolation means 15, even after an earthquake having a high risk of fire, the seismic isolation devices 4 to 8 can be fireproof. Performance can be imparted.

Further, since the rope 24 is a striated body having flexibility, the seismic isolator is bent in a normal state when the seismic isolation means 15 is not deformed. When the lower structure 101 and the upper structure 102 are contained in the lower structure 101 and the upper structure 102, when the relative displacement occurs between the lower structure 101 and the upper structure 102, the rope 24 does not bend and the rope 24 exerts tension. It is possible to restrict the relative displacement with the body 102 from further increasing. Therefore, the rope 24
Can follow the relative displacement between the lower structure 101 and the upper structure 102.

Since the ropes 24 or the sockets 26 connected to the ropes 24 are provided with buffer means 25 and 28, when the seismic force is applied to the seismic isolation devices 4 to 8,
Part of the impact force received by the rope 24 is
Thus, the impact force can be reduced. When the rope 24 is made of synthetic fibers such as nylon and other polyamides having a high elongation, the impact force can be reduced by the cushioning performance of the rope 24 itself.

Both ends of the rope 24 are connected to the lower structure 101 or the upper structure 102 by universal joints 41-41.
45, the lower structure 10
When the relative displacement between the upper structure 1 and the upper structure 102 fluctuates, the lower structure 101 or the upper structure 102 at both ends of the rope 24 is changed according to the direction and magnitude of the relative displacement. Can follow an arbitrary direction and angle.

Further, both ends of the rope 24 are connected to the lower structure 101 or the upper structure 102 by universal joints 41-41.
45, and the universal joints 41 to 4
5, the shock absorbing means 49a, 49b, 50 to 53 are provided, so that when the seismic force is applied to the seismic isolation devices 5 to 8, a part of the impact force received by the rope 24 is reduced.
The impact force can be reduced by being absorbed by 49b and 50-53.

The outer shell member 60 is composed of an annular member 61 vertically stacked and slidable in a horizontal direction with respect to each other, and a refractory material 62 covering the outer periphery of the annular member 61. Are connected to each other by the elastic bodies 73, so that a restoring force is applied between the annular bodies 61,. Therefore, there is no residual displacement between the stacked annular bodies 61 after the earthquake, and the seismic isolation devices 4 to 8 are excellent in design.

The casters 74,... Are interposed between the annular members 61,.
... the frictional resistance between them is reduced. Therefore, following the deformation of the seismic isolation means 15, the annular bodies 61,. Further, after the earthquake, there is no residual displacement caused by the frictional resistance between the laminated annular bodies 61,...

(Embodiment 9) FIG. 13A is a longitudinal sectional view showing a seismic isolation device of the present embodiment, and FIG.
FIG. 2 is a longitudinal sectional view showing the operation of the seismic isolation device.

The seismic isolation device 9 of this embodiment is different from the seismic isolation device 1 of the first embodiment in that
9 has been replaced. FIG. 13 (a) and FIG.
In FIG. 3B, the illustration of the outer shell material 60 is omitted. The rod material 29 is a braided or stranded wire made of a composite material in which a synthetic fiber such as aramid, polyamide, polyester, or polyvinyl alcohol, a carbon fiber, a fiber such as a glass fiber, and a resin such as an epoxy resin or a vinyl ester resin are combined. Alternatively, it is formed of a rod-shaped material having high strength characteristics and not flexibility, such as a PC steel rod or a PC steel strand.

Next, universal joints 46, 46 having the shape shown in FIG. 13 are embedded in the pillar lower part 101 and the pillar upper part 102, respectively. Then, the one end and the other end of the bar 27 are inserted into the universal joints 46 and 46, respectively, so that they are at the same position in a plan view in a normal state where the seismic isolation means 15 is not deformed. ing. Stoppers 46a are respectively attached to both ends of the bar 29, and the stopper 46a abuts the surface 46b of the universal joint 46 so that the bar 29 does not come off from the universal joint 46. Further, between the stopper 46a and the surface 46b, a buffer means 54 made of a spring or rubber is provided. A plurality of rods 29,... Are similarly attached between the lower column 101 and the upper column 3 and the rods 29,.
Are formed to have the same dimensions. This dimension is equal to the normal when the seismic isolation means 15 is not deformed.
As shown in FIG. 13A, the stopper 46a and the surface 4
6b, the lower part of the column 1
When horizontal displacement occurs between 01 and the column upper part 102,
As shown in FIG. 13B, the stopper 46a and the surface 46b
The length is set so as to limit the deformation of the seismic isolation means 15 to a certain value or less due to the close contact between.

(Embodiment 10) FIG. 14A is a longitudinal sectional view showing a seismic isolation device of the present embodiment.
(B) is a longitudinal sectional view showing the operation of the seismic isolation device.

The seismic isolation device 10 of this embodiment is different from the seismic isolation device 9 of the ninth embodiment in that the universal joint 46 in FIG.
Is replaced by a universal joint 47 having the shape shown in FIG. In FIGS. 14A and 14B, illustration of the outer shell material 60 is omitted.

The universal joints 47 are buried in the column lower portion 101 and the column upper portion 102, respectively. The universal joints 47, 47 are generally constituted by a sphere 47a, a stopper 47b which engages with the surface of the sphere 47a, and a buffering means 55 made of a spring or the like. And the bar 2
9 is fixed to the spheres 47a, 47a so that the one end and the other end thereof are at the same position in plan view in a normal state where the seismic isolation means 15 is not deformed.
The ball 47 is attached to both ends of the bar 29.
The rod member 29 is prevented from falling out of the universal joint 47 by a contacting the stopper 47b. A plurality of bars 29,... Are similarly mounted between the lower column 101 and the upper column 102, and the length of the bars 29,.
They are formed in the same size.

In a normal state in which the seismic isolation means 15 is not deformed, as shown in FIG.
When a play is formed between the column 7a and the stopper 47b, and horizontal displacement occurs between the column lower part 101 and the column upper part 102 during an earthquake, as shown in FIG.
The close contact between a and the stopper 47b limits the deformation of the seismic isolation means 15 to a certain value or less. In addition, the buffer means 55 includes the pillar lower part 101 during an earthquake.
A chain or the like (not shown) for limiting the deformation of the seismic isolation means 15 to a certain value or less when a horizontal displacement occurs between the column and the column upper part 102 may be provided.

As described above, according to the seismic isolation device 9 or 10 described in each of Embodiments 9 and 10, the rod 29 connecting the column lower part 101 and the column upper part 102 is provided. When the relative displacement of the column upper portion 102 reaches a predetermined amount, the relative displacement between the column lower portion 101 and the column upper portion 102 can be restricted from further increasing due to the tension of the bar 29. Therefore, the seismic isolation devices 9 and 10 can have an excessive horizontal displacement prevention performance with a simple structure. In addition, the outer shell material 60 can add fire resistance to the seismic isolation devices 9 and 10. Therefore, when the seismic isolation devices 9 and 10 are applied to a middle layer of a building or the like, the outer shell material 60 can follow the deformation of the seismic isolation means 15, so that even after an earthquake with a high risk of fire, Fire resistance can be imparted to the seismic isolation devices 9 and 10.

Both ends of the bar 29 are connected to the lower structure 101 or the upper structure 102 by universal joints 46 and 4.
7, the lower structure 101
When the relative displacement between the upper structure 102 and the upper structure 102 fluctuates, the lower structure 101 or the upper structure 102 at both ends of the bar 29 is changed according to the direction and magnitude of the relative displacement. Can follow an arbitrary direction and angle.

Both ends of the bar 29 are connected to the lower structure 101 or the upper structure 102 by universal joints 46 and 4.
7, the universal joints 46, 47
Are provided with shock absorbing means 54, 55, so that when seismic force is applied to the seismic isolation devices 9, 10, a part of the impact force received by the bar 29 is absorbed by the shock absorbing means 54, 55,
The impact force can be reduced.

The outer shell member 60 is composed of an annular body 61 vertically laminated and slidable in the horizontal direction with respect to each other, and a refractory material 62 covering the outer periphery of the annular body 61. Are connected to each other by the elastic bodies 73, so that a restoring force is applied between the annular bodies 61,. Therefore, after the earthquake, there is no residual displacement between the stacked annular bodies 61,.

The casters 74,... Are interposed between the annular members 61,.
... the frictional resistance between them is reduced. Therefore, following the deformation of the seismic isolation means 15, the annular bodies 61,. Also, after the earthquake, there is no residual displacement caused by the frictional resistance between the laminated annular bodies 61,.

(Embodiment 11) FIG. 15A is a longitudinal sectional view showing a seismic isolation device of the present embodiment.
(B) is a longitudinal sectional view showing the operation of the seismic isolation device.

The seismic isolation device 11 of the present embodiment is obtained by replacing the chain 21 of the seismic isolation device 1 of the first embodiment with a damper 30. 15 (a) and 15 (b), the illustration of the outer shell material 60 is omitted. The damper 30 is composed of a viscous damper, a viscoelastic damper, etc., which can be extended and contracted in the longitudinal direction, and has a viscous fluid sealed in the inside thereof, or a rubber or the like provided on the contact surface between the cylinder of the damper 30 and the piston. Buffer means 31 comprising:

According to the seismic isolation device 11 of the eleventh embodiment, the damper 30 for connecting the column lower portion 101 and the column upper portion 102 is provided, and the column lower portion 101 and the column upper portion 1 are provided.
02 when the relative displacement of the damper 3 reaches a predetermined amount.
With a tension of 0, the relative displacement between the column lower part 101 and the column upper part 102 can be restricted from further increasing. Therefore, the seismic isolation device 11 can have an excessive horizontal displacement prevention performance with a simple structure. Further, by the outer shell material 60,
Fire resistance performance can be added to the seismic isolation device 11. Therefore, when the seismic isolation device 11 is applied to a middle layer of a building or the like, the outer shell material 60 can follow the deformation of the seismic isolation means 15, so that the seismic isolation device can be used even after an earthquake with a high risk of fire. The device 11 can be provided with fire resistance.

Further, since the damper 30 is provided with the shock absorbing means 31, when the seismic force is applied to the seismic isolation device 11, a part of the impact force received by the damper 30 is reduced.
1 to alleviate the impact force.

Further, since the damper 30 is extendable and contractible, in a normal state where the seismic isolation means 15 is not deformed, the damper 30 is contracted and the seismic isolation device 11 is displaced.
When the relative displacement occurs between the lower structure 101 and the upper structure 102, the tension is exerted in a state where the damper 30 is extended, and the lower structure 101 and the upper structure 10
It is possible to limit the relative displacement with respect to 2 from further increasing. Accordingly, the damper 30 can follow the relative displacement between the lower structure 101 and the upper structure 102.

Further, since both ends of the damper 30 are attached to the lower structure 101 or the upper structure 102 via the universal joint 48, the distance between the lower structure 101 and the upper structure When the relative displacement fluctuates, the connection angle of both ends of the damper 30 with respect to the lower structure 101 or the upper structure 102 is changed to an arbitrary direction and an angle in accordance with the direction and magnitude of the relative displacement. Can be followed.

The outer shell member 60 is composed of an annular member 61 vertically stacked and slidable in the horizontal direction with respect to each other, and a refractory material 62 covering the outer periphery of the annular member 61. Are connected to each other by the elastic bodies 73, so that a restoring force is applied between the annular bodies 61,. Therefore, after the earthquake, there is no residual displacement between the stacked annular members 61,...

Further, since the casters 74,... Are interposed between the annular members 61,.
... the frictional resistance between them is reduced. Therefore, following the deformation of the seismic isolation means 15, the annular bodies 61,. Also, after the earthquake, there is no residual displacement caused by the frictional resistance between the stacked annular members 61,...

The seismic isolation device of the present invention is not limited to the above embodiment, and various modifications and design changes may be made without departing from the spirit of the present invention. For example, in each of the embodiments described above, only the case where the seismic isolation devices 1 to 11 according to the present invention are applied to a column having a square cross section has been described. However, the present invention is not limited to this. The same can be applied to. In this case, the outer shell material (annular body and refractory material) surrounding the seismic isolation means may be formed in an annular shape in plan view. Further, as the seismic isolation means, a means having a cavity at the center in plan view may be used, and a connecting member may be arranged inside the cavity. Also,
Universal joints 41 with spherical washers, spherical plain bearings, etc.
Instead of 48, a ball bearing, a needle bearing or the like may be used as the universal joint. Also, the refractory material 62
(63, 64) provided with a refractory member 65 (66, 6).
7) The components 65a to 65c (66a to 66c, 6
7a to 67c), some of them may be omitted as long as the fireproof member 65 (66, 67) satisfies predetermined fireproof performance, shape and cushioning property. Also, the elastic material 7
And casters 74 are preferably arranged at equal intervals in the circumferential direction of the seismic isolation devices 1 to 11, but the number is appropriately selected according to the cross-sectional dimensions of the pillar. It is possible to Also, casters 74
Instead, a caster or the like in which the direction of the rotating shaft can be freely changed may be used as the sliding bearing. In addition, it is needless to say that specific detailed structures and the like can be appropriately changed.

[0086]

According to the seismic isolation device of the first aspect, a connecting member for connecting the lower structure and the upper structure is provided, and the relative displacement between the lower structure and the upper structure is a predetermined amount. Is reached, the relative displacement between the lower structure and the upper structure can be restricted from further increasing due to the tension of the connecting member. Therefore, with a simple structure, the seismic isolation device can have an excessive horizontal displacement prevention performance. Further, the outer shell material can add fire resistance to the seismic isolation device. Therefore, when the seismic isolation device is applied to a middle layer of a building or the like, the outer shell material can follow the deformation of the seismic isolation means. Performance can be imparted.

According to the seismic isolation device of the second aspect, the same effect as that of the first aspect is obtained, and the connecting member is formed of a flexible linear body. In a normal state where the striated body is not bent, the striated body is accommodated in the seismic isolation device in a bent state, and when relative displacement occurs between the lower structure and the upper structure, the striated body is bent. Is eliminated, the connecting member exerts tension, and the relative displacement between the lower structure and the upper structure can be restricted from further increasing. Therefore, the connecting member can be capable of following the relative displacement between the lower structure and the upper structure.

According to the seismic isolation device of the third aspect, the same effects as those of the first or second aspect can be obtained, and the connecting member is provided with the buffer means. When applied, a part of the impact force received by the connecting member is absorbed by the buffer means, and the impact force can be reduced.

According to the seismic isolation device of the fourth aspect, the same effect as in any one of the first to third aspects is obtained, and both ends of the connecting member are connected to the lower structure or the upper structure by a universal joint. Since it is attached via, when the relative displacement between the lower structure and the upper structure fluctuates, depending on the direction and magnitude of the relative displacement, both ends of the connecting member, The connection angle to the lower structure or the upper structure can follow any direction and angle.

According to the seismic isolation device of the fifth aspect, the same effect as that of the fourth aspect is obtained, and both ends of the connecting member are attached to the lower structure or the upper structure via a universal joint. Since the universal joint is provided with buffer means, when seismic force is applied to the seismic isolation device, part of the impact force received by the connecting member is absorbed by the buffer means,
The impact force can be reduced.

According to the seismic isolation device of the sixth aspect, the same effect as any one of the first to fifth aspects is obtained, and the outer shells are vertically stacked and slid in the horizontal direction with respect to each other. It is composed of a flexible annular body and a refractory material covering the outer periphery of the annular body. Since the annular bodies are connected to each other by an elastic body, a restoring force is applied between the annular bodies. Therefore, after the earthquake, there is no residual displacement between the stacked annular members, and the seismic isolation device is excellent in design.

According to the seismic isolation device of the seventh aspect, the same effect as that of the sixth aspect can be obtained, and a sliding bearing is interposed between the annular bodies, so that the annular body can be provided between the annular bodies. Friction resistance is reduced. Therefore, following the deformation of the seismic isolation means, the space between the annular bodies moves smoothly. Further, after the earthquake, a residual displacement due to the frictional resistance does not occur between the stacked annular members, and the seismic isolation device is excellent in design.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an example of a seismic isolation device of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a sectional view showing details of a connecting member.

FIG. 4 is a longitudinal sectional view showing details of a sliding bearing.

FIG. 5 is a longitudinal sectional view showing details of a refractory material.

FIG. 6 is a longitudinal sectional view showing another example of the refractory material.

FIG. 7 shows still another example of the refractory material, in which (a)
Is a longitudinal sectional view, and (b) is a partial perspective view.

8A is a longitudinal sectional view showing another example of the seismic isolation device of the present invention, and FIG. 8B is a longitudinal sectional view showing the operation of the seismic isolation device.

9A and 9B show an example of a universal joint, in which FIG. 9A is a longitudinal sectional view and FIG. 9B is a plan view.

FIG. 10 is a longitudinal sectional view showing another example of the universal joint.

FIG. 11 is a longitudinal sectional view showing still another example of the universal joint.

12A is a longitudinal sectional view showing still another example of the seismic isolation device of the present invention, and FIG. 12B is a longitudinal sectional view showing the operation of the seismic isolation device.

13A is a longitudinal sectional view showing still another example of the seismic isolation device of the present invention, and FIG. 13B is a longitudinal sectional view showing the operation of the seismic isolation device.

14A is a longitudinal sectional view showing still another example of the seismic isolation device of the present invention, and FIG. 14B is a longitudinal sectional view showing the operation of the seismic isolation device.

15A is a longitudinal sectional view showing still another example of the seismic isolation device of the present invention, and FIG. 15B is a longitudinal sectional view showing the operation of the seismic isolation device.

[Explanation of symbols]

1 to 11 seismic isolation device 15 seismic isolation means 21 connecting material (chain) 24 connecting material (rope) 26 connecting material (socket) 29 connecting material (bar) 30 connecting material (damper) 23, 25, 28, 31 buffering means 41 to 48 Universal joint 49a, 49b, 50 to 55 Buffer means 60 Outer shell material 61, 61U, 61L Annular body 62 to 64 Fireproof material 73 Elastic body 74 Sliding bearing (caster) 101 Lower structure (lower column) 102 Upper structure Body (upper pillar)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshio Fujioka 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. F-term (reference) 3J048 AA03 AC01 AD05 BA05 BA24 BD08 BE03 BG02 CB05 DA01 EA38

Claims (7)

[Claims] 1. A seismic isolation device interposed between a lower structure and an upper structure, wherein the upper structure is supported while being movable with respect to the lower structure, and the lower structure is connected to the upper structure. Seismic isolation means for mitigating seismic force transmitted to the body, connecting the lower structure and the upper structure, and when the relative displacement between the lower structure and the upper structure reaches a predetermined amount, And a fire-resistant outer shell material covering the outer periphery of the seismic isolation means and the coupling material, and capable of following the deformation of the seismic isolation means. And seismic isolation device. 2. The seismic isolation device according to claim 1, wherein said connecting member comprises a flexible linear body. 3. The seismic isolation device according to claim 1, wherein the connecting member includes a buffer. 4. The seismic isolation device according to claim 1, wherein both ends of the connecting member are attached to the lower structure or the upper structure via a universal joint. And seismic isolation device. 5. The seismic isolation device according to claim 4, wherein the universal joint is provided with a buffer. 6. The seismic isolation device according to any one of claims 1 to 5, wherein the outer shell material is vertically stacked and slidable in a horizontal direction with respect to each other, and an outer periphery of the annular body. A seismic isolation device, comprising: a refractory material covering the ring; and the annular bodies are connected to each other by an elastic body. 7. The seismic isolation device according to claim 6, wherein a sliding bearing is interposed between the annular members.