JPH11336202A - Base isolation bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation bearing device capable of surely preventing an upper structural body from settlement or inclination and stably bearing the upper structural body. SOLUTION: Both up and down sliding members 3 and 4 constituting a sliding bearing are slid to damp and reduce rolling applied to an upper structural body A, and a buffer 9 stored in a recessed fitting section 8 is deformed to absorb the inclination of a movable plate 7. Since the buffer 9 is prevented from being cut into a gap between the movable plate 7 and recessed fitting section 8 by a seal link 11 fitted into a groove section of the movable plate 7, there is no variation in the thickness and volume of the buffer 9, and they can remain unchanged. When the deformation is released, the buffer 9 can be restored to an original state, so that the settlement or inclination of the upper structural body A can be surely prevented, and the upper structural body A can be stably borne.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, a building,
Conventional building expansion, corridor, roof support,
The present invention relates to a seismic isolation bearing device used for a part supporting a structure such as a bridge.

[0002]

2. Description of the Related Art Conventionally, as a seismic isolation bearing device for supporting a structure as described above, for example, a sliding bearing 22 is provided between an upper structure A and a lower structure B as shown in FIG. There is an installed seismic isolation bearing device 21.

In this apparatus, a metal sliding member 23 constituting a sliding bearing 22 is fixed to a lower surface of a fixed plate 25, and the fixed plate 25 is fixed to a lower surface of the upper structure A.

On the other hand, a sliding member 24 made of synthetic resin is fixed on the upper surface side of the movable plate 27, and the movable plate 27 is formed on the upper surface side of the fixed plate 26 via a cushioning material 29 made of synthetic rubber. It is fitted and stored in the fitting portion 28.

[0005] In an earthquake site, the sliding members 23 and 24 constituting the sliding bearing 22 are repeatedly displaced in an arbitrary direction to attenuate and reduce the rolling applied to the upper structure A. The cushioning material 29 stored in the concave fitting portion 28 is deformed to absorb the tilt of the movable plate 27.

However, the above-mentioned movable plate 27 is accommodated in the concave fitting portion 28 so as to be movable up and down, and a gap between the opposing peripheral surfaces is allowed to move up and down. When the sliding members 23 and 24 are displaced in an arbitrary direction, as shown in FIG. 8, a cushioning material is provided in a gap a formed between the opposing peripheral surfaces of the movable plate 27 and the concave fitting portion 28 as shown in FIG. Since the outer peripheral edge of 29 is penetrated, a change occurs in the thickness and volume of the cushioning material 29 at the peripheral edge, the thickness of the protruding portion is reduced, and the upper structure A sinks or tilts. Sometimes.

Further, since the load of the upper structure A is constantly applied to the cushioning material 29, the outer periphery of the cushioning material 29 is restored to its original state while the outer periphery of the cushioning material 29 bites into the gap a. There is a problem that the height and the inclination of the upper structure A are hard to return to the original state without being restored to the thickness and the volume.

SUMMARY OF THE INVENTION In view of the above problems, a sealing member is fitted on a peripheral surface of one of the sliding members constituting a sliding bearing and a fitting portion formed on one of the structures, and the peripheral surface of the sealing member is fitted. The purpose of the present invention is to provide a seismic isolation bearing device that can stably support the upper structure without changing the thickness and volume of the cushioning material because it prevents the cushioning material from trying to bite into the gap between them. I do.

[0008]

According to the first aspect of the present invention,
A seismic isolation bearing device having a sliding bearing formed by vertically contacting a sliding member between an upper structure and a lower structure,
The one sliding member was fitted into a concave fitting portion formed in the upper structure or the lower structure, and was accommodated in a lower portion of the sliding member on a peripheral surface facing the sliding member and the fitting portion. It is a seismic isolation bearing device in which a seal member is fitted so as to face the outer peripheral edge of the cushioning material.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the seal member is fitted into a groove formed on the outer peripheral surface on the fitting side of the sliding member. The seal member is characterized in that it is a seismic isolation bearing device having a tapered surface which is formed on a peripheral surface opposite to the tapered surface in a direction in which the seal member is expanded in the radial direction.

[0010]

According to a first aspect of the present invention, when a vibration (rolling) is transmitted to the lower structure, the upper and lower sliding members constituting the sliding bearing are repeatedly displaced in any direction, thereby the upper structure. To attenuate and reduce the rolling applied to the vehicle. The cushioning member accommodated in the fitting portion of the upper structure or the lower structure is deformed to absorb the inclination of the sliding member fitted in the fitting portion. At the same time, the sealing member fitted to the opposing peripheral surface of the sliding member and the fitting portion prevents the cushioning material from trying to bite into the gap between the sliding member and the fitting portion. The volume can be kept constant.

According to the second aspect of the present invention, in addition to the operation of the first aspect, the tapered surfaces formed in the seal member and the groove abut against each other, and the reaction force thereof causes the inside of the fitting portion to be formed. Since the seal member is pressed positively against the peripheral surface,
The gap between the sliding member and the fitting portion is sealed by the seal member, and it is possible to reliably prevent the cushioning material from going into the gap.

[0012]

According to the present invention, the cushioning material attempts to bite into the gap formed between the opposing peripheral surfaces of the sliding member and the fitting portion by the sealing member fitted to the opposing peripheral surfaces. Therefore, the thickness and volume of the cushioning material do not change and can be kept constant. When the deformation is released, the cushioning material is restored to the original state, so that it is possible to reliably prevent the upper structure from sinking or tilting as in the conventional example, and to stably support the upper structure. be able to.

[0013] In addition, if any trouble occurs in the sliding bearing or the bearing function is deteriorated, and it is necessary to replace one or both of the sliding member and the cushioning material,
By jacking up the upper structure, the sliding member and the cushioning material are taken out from the fitting portion of the structure, and either or both of the sliding member and the cushioning material are replaced with new ones, and the sliding and cushioning properties are improved. The member can be replaced with a member excellent in quality, and the operation can be performed easily and easily, and the workability is improved.

Further, as the load applied to the sliding bearing is larger, the tapered surfaces formed in the seal member and the groove are brought into stronger contact with each other. Since the sealing member is positively pressed against the sliding member, the gap between the sliding member and the fitting portion can be sealed, and the cushioning material can be reliably prevented from entering the gap. , And a buffer function can be stably obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show a seismic isolation bearing device provided by combining a sliding bearing and a laminated rubber bearing. In FIGS. 1 and 2, the seismic isolation bearing device 1 includes an upper structure A and a lower structure B. A sliding bearing 2 disposed between the sliding bearings and disposed on the upper side,
This is a structure that is seismically isolated by a synergistic action with the laminated rubber bearing 12 disposed on the lower side.

The sliding bearing 2 is made of metal (for example, stainless steel)
Sliding member 3 formed of (for example, a metal plate having a thickness of about 4 mm)
And a sliding member 4 (for example, a synthetic resin plate having a thickness of about 1.2 mm) formed of a synthetic resin (for example, polytetrafluoroethylene). The sliding members 3 and 4 are fixed to an upper fixing plate 5 and a lower fixing member. It is arranged on the side facing the plate 6.

The sliding member 3 is fixed to the lower surface of the fixed plate 5, and the fixed plate 5 is connected to the lower surface of the upper structure A via screw studs 5a projecting from the upper surface of the member. Fixed.

In addition to the sliding member 3, for example, a hard chrome plating treatment is performed on steel, titanium, or another metal or steel material capable of maintaining a low friction coefficient of the sliding member 4.
A metal plate subjected to molybdenum treatment or the like may be used.

On the lower peripheral edge of the fixed plate 5, a regulating member 5b is formed continuously or partially in contact with the sliding member 3 fixed to the fixed plate 6 or the outer peripheral edge of the fixed plate 6. Once formed, the upper structure A is regulated to a preset displacement amount.

The sliding member 4 is formed by fixing a sliding material made of synthetic resin on the upper surface side of the movable plate 7, and the movable plate 7 is fitted into a concave fitting portion 8 formed at the center of the upper surface of the fixed plate 6. On the other hand, it is fitted and stored so that it can move up and down.

A cushioning material 9 (for example, a synthetic rubber plate having a thickness of about 4 mm) made of synthetic rubber (for example, chlorobrene rubber) is laid between the lower portion of the movable plate 7 and the bottom of the concave fitting portion 8. doing.

In addition to the sliding member 4, for example, polystyrene, polyacetal or other synthetic resin having a low friction coefficient or other material may be used. In addition to the cushioning material 9, for example, a synthetic rubber such as acrylonitrile rubber, butadiene rubber, or another member having excellent cushioning properties may be used.

The concave fitting portion 8 includes a movable plate 7 and a cushioning material 9.
The movable plate 7 is formed in a size and shape substantially matching the outer peripheral edge of the movable plate 7 and allowing the vertical movement of the movable plate 7. Further, when the cushioning material 9 is compressed and deformed, the sliding member 4 is formed so as to protrude above the upper surface side of the fixed plate 6 and the outer peripheral surface on the upper end side of the movable plate 7 is formed to have a depth slightly protruding upward. .

The groove 1 formed on the outer peripheral surface on the lower end side of the movable plate 7
At 0, a seal ring 11 formed of a synthetic resin (for example, polytetrafluoroethylene) is fitted.

In addition to the seal ring 11, for example,
A synthetic resin such as polyethylene, polypropylene, and nylon, or another ring having excellent slidability may be used.

The inner peripheral edge of the seal ring 11 is
The outer peripheral edge is formed in a size and a shape to be pressed against the inner peripheral surface of the concave fitting portion 8.

Tapered surface 1 formed on inner peripheral edge of groove 10
0a and the tapered surface 11a formed on the inner peripheral edge of the seal ring 11 expand the seal ring 11 in the radial direction as the load of the upper structure A is applied to the movable plate 7 (concave fitting). Direction in which it is pressed against the inner peripheral surface of the notch 8)
Direction and angle.

Incidentally, the sliding members 3, 4 and the cushioning material 9 may be changed to any thickness and material according to the stress (load) applied when an earthquake occurs. The laminated rubber bearing 12 is provided with a suitable number of metal plates 14 inside a flexible rubber material 13.
(For example, a steel plate or a plate formed of another metal) is arranged in layers to form the laminated rubber 15.

The mounting plate 16 fixed to the upper end of the laminated rubber 15 is fixed to the lower surface side of the fixing plate 6 disposed below the sliding bearing 2, and the mounting plate 16 fixed to the lower end is the mounting plate 1.
The lower structure B is fixed to the upper surface side of the lower structure B via a line 7.

Incidentally, the laminated rubber bearing 12 may be arranged on the upper side of the sliding bearing 2, and the same operation and effect as described above can be obtained.

The illustrated embodiment is configured as described above, and the seismic isolation operation of the seismic isolation bearing device 1 will be described below.
First, as shown in FIG. 1, when a quake is transmitted to the lower structure B at the time of an earthquake, the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide. Move integrally, until the laminated rubber 15 constituting the laminated rubber bearing 12 is repeatedly deformed in an arbitrary direction,
Since the horizontal stress (rolling) is attenuated, the rolling applied to the upper structure A is reduced.

Subsequently, when the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide, the sliding members 3 and 4 are repeatedly displaced in an arbitrary direction so that horizontal stress (rolling) occurs.
Owing to the synergistic action of the sliding bearings 2 and the laminated rubber bearings 12 arranged vertically, the rolling applied to the upper structure A is greatly reduced.

At this time, as shown in FIG. 2, the cushioning material 9 is compressed and deformed to absorb the inclination of the movable plate 7 to which the sliding member 4 is fixed, so that the sliding members 3 and 4 are kept in contact with each other. The hanging load of the upper structure A is always applied to the sliding bearing 2, and when the movable plate 7 is inclined, the outer peripheral edge of the cushioning material 9 is slightly deformed, and the movable plate 7 and the concave fitting portion 8 The groove 1 of the movable plate 7 tries to cut into the gap a formed between the opposing peripheral surfaces.
The bite of the cushioning material 9 is prevented by the seal ring 11 fitted to the zero, and its thickness and volume are kept constant.

As the vertical load applied to the slide bearing 2 increases, the tapered surface 10a formed in the groove 10 and the tapered surface 11a formed in the seal ring 11 come into contact with each other more strongly. Due to the reaction force, the seal ring 11 is radially expanded against the elasticity, and the seal ring 11 is positively pressed against the inner peripheral surface of the concave fitting portion 8.

Since the gap a between the movable plate 7 and the concave fitting portion 8 is sealed by the seal ring 11, it is possible to reliably prevent the outer peripheral edge of the cushioning material 9 from going into the gap a. can do.

After the occurrence of the earthquake, the sliding bearing 2 has some inconvenience or its bearing function is deteriorated.
When it is necessary to replace one or both of the sliding member 4 and the cushioning material 9, the upper structure A is jacked up to take out the sliding member 4 and the cushioning material 9 from the concave fitting portion 8 of the fixing plate 6. The new sliding member 4 and the cushioning material 9 can be replaced.

As described above, the seal ring 11 fitted in the groove 10 of the movable plate 7 ensures that the cushioning material 9 tries to bite into the gap a between the movable plate 7 and the concave fitting portion 8. Since this is prevented, the thickness and volume of the cushioning material 9 do not change and can be kept constant. When the deformation is released, the cushioning material 9 is restored to the original state.
Can reliably be prevented from sinking or tilting, and the upper structure A can be stably supported.

In addition, when any trouble or trouble occurs in the sliding bearing 2 and the bearing function is deteriorated, and it is necessary to replace one or both of the sliding member 4 and the cushioning material 9, the upper structure A By jacking up
The sliding member 4 and the cushioning material 9 are taken out from the concave fitting portion 8 formed in the fixing plate 6, and one or both of the sliding member 4 and the cushioning material 9 are replaced with new ones, and the sliding property and the cushioning property are improved. It can be replaced with a superior member, the operation can be performed easily and easily, and the workability is improved.

Further, as the vertical load applied to the slide bearing 2 increases, the tapered surface 10a formed in the groove 10
Since the tapered surface 11a formed on the seal ring 11 is strongly contacted with each other, and the seal ring 11 is positively pressed against the inner peripheral surface of the concave fitting portion 8 by a reaction force generated at the time of the contact, Clearance a between movable plate 7 and concave fitting portion 8
Can be sealed.
Can be reliably prevented from trying to bite, and the buffer function can be stably obtained.

FIG. 3 shows another example of the seismic isolation bearing device 1 in which only the slide bearing 2 is disposed between the upper structure A and the lower structure B. A fixing plate 5 constituting the device is connected to the upper structure. A is fixed to the lower surface side of A, and the fixing plate 6 is fixed to the upper surface side of the lower structure B via the installation plate 17. At the time of the earthquake, when a roll due to the earthquake is transmitted to substructure B,
Since the sliding members 3 and 4 constituting the sliding bearing 2 are repeatedly displaced in any direction to attenuate and reduce the rolling applied to the upper structure A, the seismic isolation is equivalent to that of the sliding bearing 2 of the above-described embodiment. The effect is obtained.

In addition, the sealing material 11 fitted in the groove 10 of the movable plate 7 reliably prevents the buffer material 9 from biting, and the thickness and the volume are kept constant. And an effect can be obtained.

FIG. 4 shows another example in which the inner peripheral edge of the seal ring 11 fitted in the groove 10 is formed vertically (for example, straight), and the pressure contact force in the radial direction is weaker than that of the above-described tapered ring. However, since the outer peripheral edge of the cushioning material 9 is regulated by the seal ring 11, the thickness and volume of the cushioning material 9 change, and the gap a between the movable plate 7 and the concave fitting portion 8 is reduced. It is possible to reliably prevent the outer peripheral edge of the material 9 from biting, and it is possible to achieve substantially the same operation and effect as those of the above-described embodiment.

FIG. 5 shows another example in which a seal ring 11 is fitted into a groove 18 formed on the outer peripheral edge of the cushioning material 9. The gap a between the movable plate 7 and the concave fitting portion 8 is formed by the seal ring 11. Therefore, it is possible to reliably prevent the outer peripheral edge of the cushioning material 9 from biting, and the thickness and volume of the cushioning material 9 are kept constant.

The tapered surface 18a formed in the groove 18
And the tapered surface 11a formed on the seal ring 11 are in contact with each other, and the outer peripheral surface of the seal ring 11 is positively pressed against the inner peripheral surface of the concave fitting portion 8 by the reaction force. The same operational effects as those of the above-described embodiment can be obtained.

As shown in FIG. 6, the inner peripheral edge of the seal ring 11 fitted in the groove 18 may be formed vertically (for example, straight), so that the pressure contact force in the radial direction is greater than that of the above-described tapered ring. However, the thickness and volume of the cushioning material 9 can be reliably prevented from changing.

In correspondence between the configuration of the present invention and the above-described embodiment, the fitting portion of the present invention corresponds to the concave fitting portion 8 of the embodiment, and similarly, the sealing member is attached to the seal ring 11 in the same manner. Correspondingly, the present invention is not limited only to the configuration of the above-described embodiment.

The sliding member 4 constituting the above-described sliding bearing 2
May be fixed to the lower surface side of the fixed plate 5 and the sliding member 3 may be fixed to the upper surface side of the movable plate 7, and the same operation and effect as those of the above-described embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an installed state of a seismic isolation bearing device.

FIG. 2 is an enlarged side view showing a fitting portion of a seal ring.

FIG. 3 is a side view showing another installation state of the seismic isolation bearing device.

FIG. 4 is an enlarged side view showing another example of a seal ring formed in a straight type.

FIG. 5 is an enlarged side view showing another example in which a seal ring is fitted to a cushioning material.

FIG. 6 is an enlarged side view showing another example of the seal ring.

FIG. 7 is a side view showing an installation state of a conventional seismic isolation bearing device.

FIG. 8 is an enlarged side view showing a deformed state of the cushioning material.

[Explanation of symbols]

 A: Upper structure B: Lower structure a: Clearance 1: Seismic isolation bearing device 2: Sliding bearing 3, 4, Sliding member 5: Fixed plate 6, Fixed plate 7, Movable plate 8, Depressed fitting part 9, Buffer Material 10, 18 Groove 11 Seal ring 10a, 11a, 18a Tapered surface 12 Laminated rubber bearing

Claims (2)

[Claims] 1. A seismic isolation bearing device having a sliding bearing having an upper and lower sliding member opposed to each other between an upper structure and a lower structure, wherein the one sliding member is connected to the upper structure. Alternatively, the seal member is fitted into a concave fitting portion formed in the lower structure, and a seal is provided on the peripheral surface of the sliding member facing the fitting portion so as to face the outer peripheral edge of the cushioning material accommodated in the lower portion of the sliding member. Seismic isolation bearing device fitted with members. 2. The seal member is fitted into a groove formed on the outer peripheral surface of the sliding member on the fitting side, and the seal member is radially expanded on a peripheral surface facing the groove and the seal member. The seismic isolation bearing device according to claim 1, wherein a tapered surface that is inclined in a direction to be formed is formed.