JP2000213590A - Slide supporting base isolating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide supporting base isolating device of a building preventing the collapse and destruction of buildings, bridges (including elevated road and railroad) and the like caused by an earthquake. SOLUTION: Several pieces of slide discs are laminated and stored in a cylindrical body made of elastic material such as a synthetic resin, and rubber, and friction resistance of a slide contact surface on a pair of sliding discs adjacent to each other is made extremently small. A fixing plate is fixed to an upper and lower part of the cylindrical body to make a base isolating device 1, 1a.... The upper and lower fixing plates of the base isolating device 1, 1a... fixes a concrete foundation or bridge pier and a platform or a bridge girder to lay the base isolating device 1, 1a... between the concrete foundation and the platform, thereby vibrating a building and a bridge with a long period. Therefore, the vibration caused by an earthquake is damped and then transmitted to the building or the bridge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding bearing type seismic isolation device for a building which prevents the collapse or destruction of buildings, bridges (including elevated roads and railway tracks), etc. due to an earthquake.

[0002]

2. Description of the Related Art Conventionally, especially in a wooden building, FIG.
As shown in FIG. 2, the upper end of the anchor bolt a protruding from the upper surface of the concrete foundation b is inserted through an insertion hole d formed in a suitable position on the base c so as to penetrate the concrete foundation b.
The base c was directly mounted on the base, and the washer e and the nut n were attached to the protruding ends of the anchor bolts a and screw-fitted. Rigid connections are also made between buildings and foundations such as RC structures, S structures, and SRC structures, and between piers and bridge girders in bridges.

[0003]

However, the above structure has a problem to be solved as follows. (1) Earthquake shocks, vibrations, etc. are transmitted to buildings and bridge girders as they are. (2) The structure is large in size, since it is only a structure that can withstand the impact of an earthquake by using many braces and bearing walls to harden it, and the buildings and bridges themselves shake in the same way as the ground vibrations. Buildings and bridges are likely to collapse or break in an earthquake.

[0004]

SUMMARY OF THE INVENTION In view of the problems (1) and (2) based on the above-mentioned prior art, the present invention is directed to a vertical body in a cylindrical body made of an elastic material such as synthetic resin or rubber. A plurality of slide disks in a stacked state are accommodated, the frictional resistance of the sliding contact surfaces of a pair of adjacent slide disks is extremely reduced, and a concrete foundation and a pier in a building (base) or a bridge are provided on the upper and lower portions of the cylindrical body. A pair of upper and lower metal fixing plates is installed on the bridge girder to form a seismic isolation device.

[0005] An anchor bolt on a concrete foundation is inserted into the bolt insertion hole of the lower fixing plate of the seismic isolation device, and a washer and a nut are attached to a protruding end of the anchor bolt and screwed into the concrete. A plurality of seismic isolation devices are installed and fixed at predetermined positions on a foundation or a pier, and a base or a bridge girder is laid on the seismic isolation device, and the base is appropriately fixed to an upper fixing plate of the seismic isolation device, By fixing the base and the seismic isolation device, and interposing the seismic isolation device between the concrete foundation and the base, the building is vibrated in a long cycle and the vibration caused by the earthquake is attenuated and transmitted to the building or bridge girder To solve the above problem.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 18 to 21, the seismic isolation device 1 is provided at an appropriate position on the concrete foundation B in the building W.
1a ... is arranged and fixed, and the seismic isolation device 1, 1a ...
The base C of the building W is laid and fixed thereon, and the seismic isolation devices 1, 1a, ... are interposed between the concrete foundation B and the base C. Also, the seismic isolation device 1, 1a ...
Are anchored to the concrete foundation B, and a plurality of anchor bolts A, Aa,.

As shown in FIGS. 1 to 4, each of the seismic isolation devices 1, 1a... Has fixed plates 3, 3a fixed to a concrete foundation B and a base C on both upper and lower surfaces of a cylindrical device main body 2. Have been.

First, in the apparatus main body 2, FIGS.
As shown in the figure, the outer shell portion is a cylindrical body 4 formed of an elastic material such as synthetic resin or rubber (referred to as an elastic synthetic resin in this specification). .. Accommodate a plurality of slide disks 5, 5a,. still,
The cylindrical body 4 is desirably formed so as to be horizontally deformed with little resistance to external force and to have elasticity that automatically recovers after unloading.

As shown in FIG. 5, the slide disks 5, 5a... Are made of a hard material having the same diameter as the inner diameter of the cylindrical body 4 and having extremely small frictional resistance on both front and back surfaces. For example, it is formed of a synthetic resin mixed with a solid lubricant such as molybdenum disulfide, carbon powder, and graphite, or a metal or resin disk is coated with polytetrafluoroethylene (trade name: Teflon) or the like. are doing. As shown in FIG. 6, slide plates 17, 17a... Having extremely reduced friction on both front and back surfaces, similarly to the above-described slide disks 5, 5a. good.

In another embodiment, as shown in FIGS. 7 and 8, circular slide recesses 8 and 8a are provided at the centers of sliding contact surfaces 7 and 7a of adjacent slide disks 5, 5a. Stopper disk thicker than the depth of the lower circular recess 8a in the accommodation space 9
Accommodates ten. Also, chamfered portions 6, 6a are provided on the upper and lower outer peripheral edges of each slide disk 5, 5a.

In another embodiment, as shown in FIGS. 9 and 10, tapered seats are provided at the center of the rear surface of the uppermost layer of the slide disks 5, 5a. The center holes 12, 12a... Are formed in the remaining holes 11 and 11a, and the 45-degree chamfered portions 13 and 13a are formed at the upper and lower hole edges of each center hole 12, 12a. Close to the inner peripheral surface of the
The upper and lower ends of a stopper rod 14 which passes through all the central holes 12, 12a are seated on tapered counterbore 11, 11a.
Also, the upper and lower ends of the stopper rod 14 are tapered counterbore 11, 11
It is matched to the tapered circumferential surface of a. The diameter of the central holes 12, 12a and the chamfers 13, 13 so that the stopper rod 14 does not incline by more than 45 degrees with respect to the slide disks 5, 5a.
The width of a is set.

As shown in FIGS. 1 and 2, the fixing plates 3 and 3a fixed to the upper and lower surfaces of the apparatus main body 2 are made of metal, and anchor bolts A and Aa are provided at the four corners of the lower fixing plate 3. … Insertion hole
Are formed at the center of both ends of the upper fixing plate 3a, through holes 16, 16a of joint bolts J, Ja described later, respectively.

A metal flange is formed on the upper and lower outer peripheral portions of the cylindrical body 4.
30 and 30a are fixedly mounted, and fixing plates 3 and 3a for closing the opening of the cylindrical body 4 are fixedly mounted on the upper and lower portions of the flanges 30 and 30a. , 5a... Are desirable in the manufacturing process. Specifically, bolt rods 32, 32a,... Are fixed to each fixing plate 3, 3a.
The bolt rods 32, 32a are formed in the insertion holes 33, 33a,.
The nuts 34, 34a are screwed into the protruding ends of the
The fixing plates 3 and 3a are fixed to a. Alternatively, in the seismic isolation devices 1, 1a shown in FIGS. 3 and 4, the outer peripheral shape of the fixing plates 3, 3a is made the same shape and size as the flanges 30, 30a, and the insertion holes 15, 15a,.
And the insertion holes 16, 16a are formed so as to penetrate the fixing plates 3, 3a and the flanges 30, 30a.

Further, as shown in FIG. 11, the seismic isolation devices 1, 1a.
On the upper fixed plate 3a, a pair of fixed walls 35, 35a abutting on both side surfaces of the base C are provided.
Insertion holes 36 and 36a for fixing bolts D that penetrate the base C are provided, and the fixing bolts D that penetrate the insertion holes 36 in one fixing wall 35 penetrate the base C disposed between the fixing walls 35 and 35a. The tip of the fixing bolt D is inserted through the insertion hole 36a in the other fixing wall 35a, and a nut N1 is screwed into the protruding end to fix the base C to the seismic isolation device 1, 1a. .

As shown in FIG. 12, disc-shaped sliders 18 and 18a having a diameter larger than that of the stopper disk 10 are fixed on both the front and back surfaces of the stopper disk 10, while the slide disks 5, 5a. Escape grooves 19, 19a are provided around the inner peripheral surface of the circular recesses 8, 8a, and sliders are provided in the escape grooves 19, 19a.
The stopper disk 10 can be brought into contact with the inner peripheral surfaces of the circular concave portions 8 and 8a by inserting the 18 and 18a.

Also, a pair of adjacent slide disks 5,
It is desirable to make the sliding contact surfaces 7 and 7a of 5a... Different materials to improve the slidability of the slide disks 5, 5a. For example, two types of slide disks 5, 5a... Having different materials are alternately laminated, or the slide disks 5, 5a. As a specific example of the latter, as shown in FIG. 13, the slide disks 5, 5a... Are fitted into the disk body 20 and the fitting recesses 21 provided on one of the front and back surfaces of the disk body 20. The disk body 20 is made of a composite material with a slide member 22 made of a different material from the disk body 20, which is fitted and fixed so as to match the concave portion 21. or,
In the case of the seismic isolation device 1, 1a,... Having the stopper disc 10, the fitting recess 21 is formed as shown in FIG.
Is formed in a wide annular shape on the outer peripheral side of the.
Although not shown, a pair of disk members having the same diameter are integrated into slide disks 5, 5a..., And if necessary, circular recesses 8, 8a or central holes 12, 12a are formed in the slide disks 5, 5a. .. May be formed.

The material of the slide disks 5, 5a..., The disk body 20, and the slide member 22 is, for example, self-lubricating and abrasion resistant materials such as polyacetal resin, polyester resin, and nylon resin (nylon 6, nylon 66). Excellent and hard plastics, glass fiber, carbon fiber, asbestos, calcium carbonate,
Various inorganic fillers such as mica (mica), whiskers, etc., or solid lubricants such as molybdenum disulfide, carbon powder, graphite, etc., or ceramics with smooth front and back surfaces I have.

The diameter of the lowermost layer of the slide disks 5, 5a...
5a... While having a smaller diameter, as shown in FIG. 15, the gap between the inner peripheral surface of the cylindrical body 4 and the outer peripheral surface of the uppermost lower layer portion is maintained without increasing the thickness of the cylindrical body 4. Alternatively, FIG.
As shown in FIG. 7, the portion of the cylindrical body 4 corresponding to the uppermost lower layer portion is made thicker so that its inner peripheral surface is in close contact with the outer peripheral surface of the uppermost lower layer portion. Further, the frictional resistance of the upper surface of the uppermost layer and the lower surface of the lowermost layer of the slide disks 5, 5a, that is, the frictional resistance of the contact surfaces with the fixing plates 3, 3a is extremely small. Disc made of polytetrafluoroethylene (trade name: Teflon)
The slide member 23 coated with the like is integrated.

As shown in FIG. 17, a disc-shaped rubber plate 24 is provided between the uppermost layer of the slide disks 5, 5a,... And the upper fixed plate 3a. It is desirable to form the plurality of holes 25, 25a ... regularly.

It is desirable that the raw material of the cylindrical body 4 be recycled waste tires, and it is also desirable to mix a synthetic pyrethrin-based insecticide such as pyrethroid insecticide, which exterminates pests such as termites. Also not shown,
It may be made of a foamed resin having countless bubbles.

It is preferable that not only the seismic isolation devices 1, 1a,... Be installed, but also a damping device (not shown) for damping and transmitting vibration be mixed. In addition to filling the granular material, a fixing plate is provided below the cylindrical body, and the granular material is, for example, a thermoplastic resin chip such as a PET chip, sand, metal particles, or glass particles. In the case of granules or glass granules, it is desirable to melt and process the discarded PET bottles, iron scraps, other metal scraps, empty bottles, etc., to make them into granules, and to recycle them. The finer the grain size, the better.

The concrete foundation B on which the seismic isolation devices 1, 1a... Are installed has a flat shape without beams in the drawing.
Without limiting to such a form, a general continuous footing basis,
It may be a solid basis or the like.

Next, the operation of mounting the seismic isolation device according to the present invention will be described. First, the anchor bolts A, Aa... Are inserted into the through holes 15, 15a... Of the fixed plate 3 below each seismic isolation device 1, 1a. Seismic isolation device 1 at a predetermined position on concrete foundation B,
After fixing 1a ..., the base C is placed on the seismic isolation device 1, 1a ...
, And the joint bolts J and Ja having the base C penetrated from above are inserted through the insertion holes 16 and 16a of the fixed plate 3a above the respective seismic isolation devices 1 and 1a. , N1a, and fix the base C on the seismic isolation devices 1, 1a... As shown in FIGS.
A seismic isolation device 1, 1a,. Alternatively, the base C is laid on the seismic isolation devices 1, 1a,... So that the base C is disposed between the fixed walls 35, 35a of the seismic isolation devices 1, 1a,. Insertion hole at 35 36
Is passed through the base C disposed between the fixed walls 35 and 35a, and the tip of the fixed bolt D is passed through the insertion hole 36a in the other fixed wall 35a, and a nut is inserted into the protruding end. N1 is screwed in, seismic isolation device 1,
1a: Fix the base C on top.

Finally, as shown in FIGS. 20 and 21, the gaps H, Ha... Between the seismic isolation devices 1, 1a. Then, a panel body 39 having air permeability is installed along the periphery of the building.

Next, the operation of the seismic isolation device in the building according to the present invention will be described. By fixing the fixing plates 3 and 3a formed with bolt insertion holes 15, 15a..., 21, 21a at both ends on both upper and lower surfaces of the cylindrical body 4, the bolt insertion holes 15, 15a. Are inserted through the anchor bolts A, Aa,... On the concrete foundation B side, and the joint bolts J, Ja having the base C penetrated into the bolt insertion holes 16, 16a of the upper fixing plate 3a, respectively. As shown in FIG. 11, the seismic isolation devices 1, 1a,... Are installed by inserting the insertion holes 36, 36a in the fixed walls 35, 35a and piercing the base C disposed between the fixed walls 35, 35a. Is completed,
The installation work is simplified.

Then, the building W on the concrete foundation B
Are fixed on the seismic isolation devices 1, 1a,... Via the base C, and when the earthquake occurs, the building W
The whole is shaken in a long cycle, and the vibration caused by the earthquake is attenuated and transmitted to the building W by the vibration damping means. Specifically, since the device main body 2 has a cylindrical shape, no matter which direction the roll comes from, the device body 2 is similarly deformed corresponding to the direction,
Since the cylindrical body 4 can be easily deformed in the horizontal direction and the inside thereof is constituted by the slide disks 5, 5a, etc., the horizontal rigidity of the apparatus main body 2 is low and the building W is vibrated at a long period. Becomes possible. Also, the slide disks 5, 5a,... Are free from compressive deformation due to the load of the building W and deformation in the vertical direction at the time of deformation, and
Horizontal rigidity does not increase. Therefore, the seismic isolation device 1, 1a,... According to the present invention sets the horizontal rigidity of the device main body 2 so that the deformation starts when a horizontal force greater than the wind load due to the strong typhoon acts, or If a measure is taken, it shakes in the same manner as before with respect to a weak earthquake, but does not shake due to a strong wind, and exerts a function of vibrating the entire building W integrally with a long cycle against a strong earthquake.

The seismic isolation devices 1, 1a,... Are provided between the concrete foundation B and the building W so that the building W
And the concrete foundation B are separated, and the transmission of the vibration due to the earthquake to the building W is suppressed.

As shown in FIG. 8, the slide disks 5, 5a,...
The slide disk 10 slides, and the stopper disk 10 abuts on the peripheral surface of the other circular concave portion 8a, and the slide between them stops. .. Are sequentially performed between the adjacent slide disks 5, 5a,...

Further, as shown in FIG. 10, the slide disks 5, 5a... Are sequentially slid by the tilting stopper bar 14, or the stopper bars 14 are tilted by the slid slide disks 5, 5a. The upper rim (chamfered portion 13) at the central hole 12, 12a... Of the discs 5, 5a.
When the a) comes into contact with the stopper rod 14, the slide disks 5, 5a.

The seismic isolation devices 1, 1a,... Shown in FIGS.
, At the initial stage of the action of the sudden external force, before the slide disks 5, 5a ... start sliding, the building W and concrete The upper and lower fixing plates 3, 3a fixed to the base B slide, and the lowermost portion of the cylindrical body 4 is deformed in accordance with the sliding, thereby absorbing the initial external force. Similarly, in the seismic isolation devices 1, 1a,... Shown in FIG. 17, the initial external force is first absorbed by the deformation of the rubber plate 24 in the initial stage in the action of the sudden external force.

The concrete base B and the base C are connected by the seismic isolation device 1, 1a..., And the pests, particularly termites, reach the base C unless the surface of the seismic isolation device 1, 1a. However, since the insect repellent is mixed in the cylindrical body 4, the pest does not crawl from the concrete foundation B side to the base C.

[0032]

In summary, the present invention accommodates a plurality of slide disks 5, 5a... Stacked vertically in a cylindrical body 4 made of synthetic resin having elasticity, and a pair of adjacent slide disks 5, 5a. Since the frictional resistance of the sliding contact surfaces 7 and 7a in 5a ... is extremely small, the cylindrical body 4 and the slide disks 5, 5a ... are separate bodies and have no connection relationship between each other. The object W can be vibrated in a long cycle. Also, since the cylindrical body 4 is easily deformable in the horizontal direction and the frictional resistance between the slide disks 5, 5a... Inside the cylindrical body 4 is small, the horizontal rigidity of the seismic isolation devices 1, 1a. The load of the building W acts on the seismic isolation devices 1, 1a, so that the compressive deformation thereof becomes very large. However, the slide disks 5, 5a,.
Since the apparatus main body 2 is housed, the compressive deformation of the seismic isolation devices 1, 1a... Due to the own weight of the building W does not occur, and the horizontal rigidity of the seismic isolation devices 1, 1a. You can do it. Further, since a pair of fixing plates 3 and 3a for the concrete foundation B and the building W are fixed to the upper and lower portions of the cylindrical body 4, the seismic isolation devices 1, 1a... Are easily fixed to the base C and the building W. Can be set up. Therefore, in the seismic isolation devices 1, 1a,... According to the present invention, the deformation of the device main body 2 between the fixing plates 3, 3a is not hindered by not directly connecting the concrete foundation B and the base C. 2 can make the seismic isolation function function efficiently, and the whole building W shakes in a long cycle during a strong earthquake.
The destruction and collapse of the building W can be prevented.

A pair of adjacent slide disks 5,
The recesses 8 and 8a are opposed to the sliding contact surfaces 7 and 7a in 5a... A stopper disk 10 that is thicker than the depth of the recess 8a and smaller than the recess 8a is placed in the lower recess 8a. It is possible to regulate the slide amount of 5, 5a ...
The sum of the sliding amounts of all the slide disks 5, 5a... Can be used as the horizontal deformation amount of the seismic isolation device 1, 1a.
Can be prevented from being buckled vertically by the load of the building W when the seismic isolation devices 1, 1a,. or,
Since the recesses 8 and 8a and the stopper disk 10 are formed in a circular shape, even if the vibration is applied from any direction, the slide disk 5,
The slide amount of 5a ... can be made the same. Also, even if the slide between the pair of adjacent slide disks 5, 5a... Is stopped by the stopper disk 10, the upper slide disks 5, 5a. Although there are not a few possibilities, sliders with the outer periphery projecting from the stopper disk 10 on both the front and back sides of the stopper disk 10
An escape groove for fixing the outer peripheral portions of the sliders 18 and 18a in the deep portion of the inner peripheral surface of the concave portions 8 and 8a while fixing the 18 and 18a.
Since the outer peripheral portions of the upper slider 18 of the stopper disk 10 are inserted into the escape grooves 19 of the concave portions 9a of the upper slide disks 5, 5a,. Can be prevented.

A counterbore 11, 11a is provided at the center of the lowermost one of the slide disks 5, 5a..., And a central hole 12, 12a.
Since the upper and lower ends of the stopper rod 14 having all the central holes 12, 12a... Are seated on the counterbore 11, 11a, the same effect as that of the seismic isolation device 1, 1a. Also, when the seismic isolation devices 1, 1a... Are horizontally deformed, the stopper rod 14 comes into contact with the rim of the slide disk 5, 5a. Since the upper and lower ends of 14 are aligned with the counterbore 11, 11a, and the chamfers are provided at the edges of the upper and lower holes of the central holes 12, 12a... Can be dispersed, and breakage of the stopper rod 14 during a strong earthquake can be suppressed.

When the other is slid in sliding contact with one of the same material, the sliding performance is inferior. However, since the pair of adjacent slide disks 5, 5a... Slide performance can be provided. Further, since the slide contact surfaces 7, 7a only need to be made of different materials, the slide disks 5, 5a... Are made of a composite material having different materials on the front and back sides. Since the same performance can be provided even when the thickness is reduced, cost can be reduced. Also, one sliding contact surface 7 of a pair of adjacent slide disks 5, 5a,.
Since the slide member 22 with extremely small frictional resistance is fitted and fixed in the fitting concave portion 21 provided in the 7a, the integration of both members can be improved.

Further, a pair of fixing plates 3 and 3a for fixing the concrete foundation B and the building W are fixed to the upper and lower portions of the cylindrical body 4 made of synthetic resin having elasticity. A plurality of slide disks 5, 5a... In a stacked state are accommodated, and slide plates 17, 17a having extremely small front and back frictional resistance between a pair of adjacent slide disks 5, 5a.
, And the buffer 6 is provided between the uppermost slide disks 5, 5a and the upper fixing plate 3a, so that the same effect as described above can be obtained.

The material of the slide disks 5, 5a.
Since the synthetic resin mixed with the solid lubricant is used, the sliding property of the slide disks 5, 5a... Can be maintained without replenishing the lubricant between the adjacent slide disks 5, 5a.

The inner surface of the cylindrical body 4 at the time of deformation comes into contact with the upper outer peripheral edge of the slide disks 5, 5a... To tilt the slide disks 5, 5a. Since the chamfered portions 6, 6a are provided at the upper and lower outer peripheral edges of the slide disks 5, 5a, the inner surface of the cylindrical body 4 can be prevented from contacting the upper outer peripheral edges of the slide disks 5, 5a,. Can be slid horizontally without hindrance.

Further, simply by laminating the slide disks 5, 5a..., No matter how much the frictional resistance of the sliding surfaces 7, 7a is reduced, it is possible to deny the possibility that deformation will not start unless a certain load is applied. However, since the uppermost lower layer portion of the slide disks 5, 5a,... Has a smaller diameter than the others, the uppermost lower portion of the cylindrical body 4 corresponding to the corresponding portion is more easily deformed. The upper and lower fixed plates 3, 3a can be slid with respect to the uppermost lower layer portion in 5, 5a.
Therefore, the initial external force can be absorbed by deforming the uppermost lower part of the seismic isolation devices 1, 1a,. Further, since the frictional resistance of the small-diameter slide disks 5, 5a,... In contact with the fixing plate in the small-diameter slide disk is extremely small, the sensitivity to an external force can be improved, thereby absorbing the initial external force. The performance can be improved. or,
The uppermost slide disk 5, 5a ... and the upper fixing plate 3a
Since the rubber plate 24 is interposed therebetween, the initial external force can be absorbed by the deformation of the rubber plate 24, so that the same effect as described above can be provided, and the vibration in the vertical direction can be obtained. Is transmitted to the building W after being absorbed by the compressive deformation of the rubber plate 24, so that the pitching of the building W can be suppressed, so that the rubber plate 24 also has a function as a cushioning material against a vertical external force. I can do it. Also, rubber plate 24
Formed with a plurality of holes 25, 25a,..., The rigidity of the rubber plate 24 is reduced, and the rubber plate 24 is more easily deformed. Therefore, the sensitivity to an external force can be improved, and the performance of absorbing the initial external force can be improved. Can be achieved. Further, even if the rubber plate 24 is hardened due to deterioration with time, the deformability of the rubber plate 24 can be ensured.

Further, since a pair of fixed walls 35, 35a abutting on both sides of the base C are provided on the upper fixed plate 3a, if the base C is disposed between the fixed walls 35, 35a, the bolt D Even before the fixing, the base C can be prevented from falling off, and the fixing walls 35, 35a are provided with the through holes 36, 36a for the bolts D passing through the base C. The base C can be fixed to the seismic isolation device 1, 1a,... By the nut N1 screwed into the bolt D.

A metal flange is provided on the upper and lower outer peripheral portions of the cylindrical body 4.
30 and 30a are integrally fixed, and fixing plates 3 and 3a are fixed to the flange portions 30 and 30a.
The slide disks 5, 5a ...
Are successively formed, and the upper body of the main body 4a can be closed with a lid to form the apparatus main body 2;
The practical effect of the present invention is extremely large, for example, it is possible to easily manufacture the same.

[Brief description of the drawings]

FIG. 1 is a plan view of a seismic isolation device.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of another embodiment of FIG. 1;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a sectional view of the seismic isolation device provided with a slide plate.

FIG. 7 is a sectional view of another embodiment of FIG. 5;

FIG. 8 is a sectional view showing a maximum deformation state of the seismic isolation device of FIG. 7;

FIG. 9 is a sectional view of another embodiment of FIG. 5;

FIG. 10 is a sectional view showing a maximum deformation state of the seismic isolation device of FIG. 9;

FIG. 11 is a side view of the seismic isolation device provided with a pair of fixed walls.

FIG. 12 is a sectional view of a seismic isolation device in which a slide plate is provided on a stopper disk.

FIG. 13 is a sectional view of the seismic isolation device in which the front and back sides of the slide disk are made of different materials.

FIG. 14 is a sectional view showing another embodiment of FIG.

FIG. 15 is a cross-sectional view of the seismic isolation device in which the diameter of the lowermost layer of the slide disk is reduced.

FIG. 16 is a sectional view showing another embodiment of FIG.

FIG. 17 is a cross-sectional view of the seismic isolation device in which a rubber plate is interposed between the uppermost layer of the slide disk and the upper fixed plate.

FIG. 18 is an enlarged front view of a main part showing an installed state of the seismic isolation device.

FIG. 19 is an enlarged sectional view taken along the line YY of FIG. 18;

FIG. 20 is a front view of a building on which the seismic isolation device is installed.

FIG. 21 is an enlarged vertical sectional view taken along the line ZZ of FIG. 20.

FIG. 22 is an enlarged front view of a main part showing a laid state of a conventional base.

[Explanation of symbols]

 3, 3a fixing plate 4 cylindrical body 5, 5a ... slide disk 6, 6a chamfered part 7, 7a sliding contact surface 8, 8a recess 10 stopper disk 11, 11a countersink 12, 12a ... central hole 13, 13a chamfered part 14 Stopper rod 17, 17a… Slide plate 18, 18a Slider 19, 19a Relief groove 22 Slide member 23 Slide member 24 Rubber plate 25, 25a… Hole 30, 30a Flange 35, 35a Fixing wall 36, 36a Insertion hole

Claims (18)

[Claims] 1. An elastic synthetic resin cylindrical body,
It accommodates a plurality of slide disks stacked vertically and minimizes the frictional resistance between the sliding surfaces of a pair of adjacent slide disks. A sliding bearing type seismic isolation device characterized by the provision of. 2. A sliding disk according to claim 1, wherein a concave portion is provided on a sliding contact surface of a pair of adjacent slide disks, and a stopper disk having a thickness larger than a depth of the concave portion and smaller than the concave portion is mounted in a lower concave portion. Item 2. A sliding bearing type seismic isolation device according to item 1. 3. A plate-like slider having an outer peripheral portion protruding from the stopper disk is fixedly provided on both front and rear surfaces of the stopper disk, and an escape groove into which the outer peripheral portion of the slider is inserted into the inner peripheral surface of the concave portion. The sliding bearing type seismic isolation device according to claim 2, characterized in that: 4. The sliding bearing type seismic isolation device according to claim 2, wherein the concave portion and the stopper disk are formed in a circular shape. 5. A counterbore is provided at the center of the uppermost lower layer portion of the slide disk, a center hole is formed in the remaining slide disk, and both upper and lower end portions of a stopper bar having all the center holes loosely penetrated. 2. The sliding bearing type seismic isolation device according to claim 1, wherein the seismic isolation device is seated on a vehicle. 6. A chamfered portion is provided on the upper and lower edges of the central hole, wherein the peripheral surface of the counterbore is tapered, the upper and lower ends of the stopper bar are matched with the counterbore. Item 6. A sliding bearing type seismic isolation device according to item 5. 7. A method according to claim 1, wherein a pair of adjacent slide disks are formed of different materials.
The sliding bearing type seismic isolation device according to 5 or 6. 8. The slide disk according to claim 1, wherein the front and back sides are made of a composite material of different materials.
The sliding bearing type seismic isolation device according to 5 or 6. 9. A slide member having extremely low frictional resistance is fitted and fixed in a fitting recess provided in at least one sliding contact surface of a pair of adjacent slide disks. Sliding bearing type seismic isolation device. 10. A slide in which a plurality of slide disks stacked vertically in a cylindrical body made of elastic synthetic resin are accommodated, and a frictional resistance between front and back surfaces is extremely reduced between a pair of adjacent slide disks. A sliding bearing type seismic isolation device with a plate interposed and a concrete base and a fixing plate for a building provided on the upper and lower parts of the cylindrical body. 11. The slide according to claim 1, wherein the material of the slide disk is a synthetic resin mixed with a solid lubricant. Bearing-type seismic isolation device. 12. The slide disk according to claim 1, wherein a chamfered portion is provided at upper and lower outer peripheral edges.
4. The sliding bearing type seismic isolation device according to 4, 5, 6, 7, 8, 9, 10, or 11. 13. The slide disk according to claim 1, wherein the lowermost layer of the slide disk has a smaller diameter than the others.
13. The sliding bearing type seismic isolation device according to 11 or 12. 14. A sliding bearing type seismic isolation device according to claim 13, wherein the frictional resistance of the contact surface of the small diameter slide disk with the fixing plate is extremely small. 15. A rubber plate is interposed between the uppermost slide disk and the upper fixing plate. , 11 or 12. 16. The sliding bearing type seismic isolation device according to claim 15, wherein a plurality of holes are formed in the rubber plate. 17. An upper fixing plate provided with a pair of fixing walls which abut on both side surfaces of the base, and wherein the fixing walls are provided with bolt insertion holes for penetrating the base.
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13. The sliding bearing type seismic isolation device according to 13, 14, 15 or 16. 18. The method according to claim 1, wherein a metal flange is integrally fixed to upper and lower outer peripheral portions of the cylindrical body, and the flange is fixed to a fixing plate. 6, 7, 8, 9, 10,
The sliding bearing type seismic isolation device according to 11, 12, 13, 14, 15, 16 or 17.