JPH11336201A - Bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device capable of returning an upper structural body to an original position and reducing an omnidirectional rolling. SOLUTION: In the case where an earthquake occurs, when sliding of sliding members 3 and 4 constituting a sliding bearing 2 can be allowed, both up and down bearing sections 6a and 6b are repeatedly displaced in an optional direction, and the rolling applied to an upper structural body A is redued. Before the upper structural body A is at a standstill, the upper structural body A is moved by displacement caused by the rolling with restoring force of a restoring material consisting of a columnar elastic member 5, and since the upper structural body A is returned to an original position, the position and posture of the upper structural body A are stabilized. Since both up and down sliding members 3 and 4 are returned to the position approximately coinciding with their centers, the displacement direction and displacement range of the upper structural body A are not limited, and the effect for isolating an ominidirectional rolling can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to, for example, seismic isolation buildings, building expansions, corridors, roof supports,
The present invention relates to a bearing device used for a portion for supporting a structure such as a bridge.

[0002]

2. Description of the Related Art Conventionally, as a bearing device for supporting a structure as described above, there are, for example, a laminated rubber bearing, a sliding bearing, and a composite bearing in which the laminated rubber bearing and the sliding bearing are combined. .

A laminated rubber bearing 11 of a first conventional example is shown in FIG.
As shown in the figure, between the upper structure A and the lower structure B,
Laminated rubber 1 formed by laminating rubber material 12 and metal plate 13
4 is provided, and the laminated rubber 14 is repeatedly deformed in an arbitrary direction in response to the roll applied to the upper structure A, thereby reducing the roll of the upper structure A.

As shown in FIG. 15, a sliding bearing 21 of a second conventional example is a sliding material comprising a stainless plate 22 fixed to an upper structure A and a sliding material 23 fixed to a lower structure B. , Which are repeatedly displaced in any direction to reduce the lateral vibration of the upper structure A.

As shown in FIG. 16, a composite bearing 31 according to a third conventional example has the above-described laminated rubber bearing 11 and sliding bearing 21 vertically laminated between an upper structure A and a lower structure B. The structure is arranged to reduce the lateral vibration of the upper structure A by the mutual seismic isolation function.
No. 1 discloses a configuration in which a laminated rubber bearing 11 and a sliding bearing 21 are arranged opposite to a composite type bearing 31.

[0006]

However, the laminated rubber bearing 11 of the first conventional example has a structure in which the laminated rubber 14 is deformed so as to reduce the lateral sway applied to the upper structure A.
Laminated rubber bearing 11 for the amount of deformation required to reduce roll
Because the outer diameter and height of rubber, which is a component of
When the load of the upper structure A is small and the amount of lateral deformation is large, a large laminated rubber bearing 11 is required, and it is difficult to secure a space for installation. In addition, when a mechanical damper device is mounted as a means for suppressing the deformation amount of the roll, the cost is increased.

[0007] Further, due to the load of the upper structure A and the stress at the time of deformation, creep may occur in the laminated rubber 14 or a step may occur with other bearings. Has a problem that stability becomes worse.

The sliding support 21 of the second conventional example is a structure in which a sliding material made of a stainless steel plate 22 and a sliding material 23 are slid to reduce the rolling applied to the upper structure A. When the body A is stationary, the stainless steel plate 2
Due to the contact resistance (friction resistance) between the sliding material 23 and the sliding material 23, the upper structure A is stopped at the displaced position, and cannot be returned to the original position.

Further, since the center of the sliding material made of the stainless steel plate 22 and the center of the sliding material 23 are shifted, the upper structure A
However, even if a roll occurs on the stationary side, the stainless steel plate 22 hardly moves, so that the roll after the stop cannot be reduced.

The composite bearing 31 of the third conventional example has a structure in which the laminated rubber bearing 11 of the first conventional example and the sliding bearing 21 of the second conventional example are vertically stacked. When the laminated rubber 14 is deformed, the horizontality of the sliding bearing 21 is easily damaged, and the seismic isolation function of the sliding bearing 21 cannot be expected. In addition, since the structure of the entire apparatus is complicated, it takes time and effort to design and install the apparatus, and there is a problem that the cost is increased.

In view of the above problems, the present invention moves the upper structure by an amount of displacement caused by the roll by the restoring force of the restoring material, and returns the upper structure to the original position. And the posture becomes stable. In addition, the displacement direction and the displacement range of the upper structure are not limited, the seismic isolation effect of reducing the rolling in all directions can be obtained, and an inexpensive bearing device that facilitates the seismic isolation design of the upper structure is provided. Aim.

[0012]

According to the first aspect of the present invention,
A bearing device having an upper anchor plate fixed to an upper structure and a lower anchor plate fixed to a lower structure, wherein a sliding member is arranged between the upper anchor plate and the lower anchor plate, An upper support having a restoring material whose lower end face is fixed to the upper surface of the lower anchor plate on the lower surface of the upper anchor plate, and an upper end surface fixed to the lower surface of the upper anchor plate at a position separated from the restoring material by a predetermined distance A bearing device having a member and a lower support member having a lower end surface fixed to the upper surface of the lower anchor plate, wherein the lower surface of the upper support member and the upper surface of the lower support member are slidably contacted via a sliding member. There is a feature.

According to a second aspect of the present invention, there is provided a bearing device in which the upper support member and the lower support member are disposed so as to surround an outer periphery of the restoring material, in addition to the structure of the first aspect. It is characterized by.

According to a third aspect of the present invention, in addition to the configuration of the first aspect, the support member is provided so that the restoring member surrounds the outer periphery of the upper support member and the lower support member. It is characterized by.

The invention described in claim 4 is the first and second inventions.
Or, in addition to the configuration described in 3, the sliding device interposed between the upper support member and the lower support member is a bearing device including a plurality of layers.

The fifth aspect of the present invention is directed to the first aspect.
In addition to the constitution described in 2, 3 or 4, the bearing device is characterized in that the upper supporting member, the lower supporting member, and the sliding member are provided with a regulating portion for regulating a displacement amount of the sliding member. .

[0017]

According to the first aspect of the present invention, when the upper support member and the lower support member are allowed to slide during the occurrence of an earthquake, the upper and lower support members are repeatedly displaced in arbitrary directions.
Reduces rolling applied to the upper structure. Before the upper structure is stopped, the restoring force of a restoring material (for example, a columnar body made of a rubber material, a plate-shaped or coiled steel spring, or another elastic material such as a horizontal spring having a restoring force) is used. The upper structure is moved by the displacement generated between the upper and lower structures, and the upper structure is returned to the original position. at the same time,
The upper and lower support members return to a state in which their support centers are substantially coincident with each other.

According to a second aspect of the present invention, there is provided the bearing device according to the first aspect.
In conjunction with the operation described, the upper and lower support members are displaced in any direction around the restoration material disposed inside the upper and lower support members, and return to a position and state where their centers are substantially coincident with each other. The contact state of the sliding member is maintained, and the upper structure is returned to the original position.

According to a third aspect of the present invention, there is provided the bearing device according to the first aspect.
In conjunction with the operation described above, the upper and lower support members are restricted to a predetermined displacement amount by the restoring material arranged outside the upper and lower support members that are in contact with each other, and always return to a position and a state where their centers substantially coincide with each other. Therefore, the contact state of the vertical sliding member is maintained, and the upper structure is returned to the original position.

According to a fourth aspect of the present invention, in addition to the operation of the first, second, or third aspect, the stacked members are displaced in the same direction or an arbitrary direction, and the sliding members of all stages or a plurality of stages are provided. Therefore, a large amount of rolling applied to the upper structure is reduced.

According to a fifth aspect of the present invention, in addition to the operation described in the first, second, third or fourth aspect, the upper and lower supporting members and the sliding members are provided on one or both of the supporting members or the sliding members. Since the amount of displacement is regulated by the regulating portion, it is possible to reliably prevent the upper and lower supporting members and the sliding member from separating.

[0022]

According to the present invention, before the upper structure stops, the upper structure is moved by the amount of displacement generated by the restoring force of the restoring material, and the upper structure is returned to the original position. The position and posture of the upper structure are stabilized. and,
Since the upper and lower support members are returned to a position and a state where their centers substantially coincide with each other, the displacement direction and the displacement range of the support member are not limited as in the conventional example, and displacement in all directions (horizontal direction) is allowed. Therefore, after standing still, the seismic isolation effect of reducing the sway in all directions given to the upper structure can be reliably obtained.

In addition, since the load of the upper structure is applied to the upper and lower support members that are in contact with each other, almost no load is applied to the restored material, and creep occurs in the restored material as in the conventional example.
The restoring force can be reliably prevented from lowering, and the seismic isolation function by the sliding member and the restoring function by the restoring material can be stably obtained.

Further, the upper and lower support members are displaced in an arbitrary direction with the restoring member provided inside as a center, or the upper and lower support members are regulated to a predetermined displacement amount by the restoring member disposed outside. , Is always returned to a position and a state where the centers are substantially coincident with each other, and it is possible to reliably prevent the upper and lower support members from being separated or the support function from being impaired, and to maintain and stabilize the function. Can be.

Further, since a plurality of sliding members are displaced in the same direction or an arbitrary direction and are moved by the amount of displacement generated in the plurality of sliding members, one sliding bearing is displaced as in the second conventional example. The displacement is larger than that, and the effect of isolating large rolls can be obtained. In addition, since the plurality of sliding members are displaced by an arbitrary direction and an arbitrary moving amount,
The rolling applied to the upper structure is greatly reduced, and the seismic isolation function is improved.

Further, since the upper and lower supporting members are regulated to a predetermined displacement amount by the bearing restricting portions provided on one or both of the sliding members, the upper and lower sliding members may be separated from each other during the seismic isolation. The function can be reliably prevented from being impaired, and the seismic isolation function can be obtained stably.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows the bearing device of the first embodiment in which a columnar elastic member is disposed as a restoring material at the center of the inner peripheral side of the upper support member and the lower support member which are formed in a ring shape and arranged concentrically,
1, 2 and 3, an upper anchor plate 7a and a lower anchor plate 7b are fixed to a lower surface of an upper structure A and an upper surface of a lower structure B, respectively. The upper end surface of the ring-shaped upper support member 6a and the lower end surface of the lower support member 6b are fixed to the upper surface and the lower end surface of the upper support member 6a and the lower support member 6b.
The upper end surface of the upper support member 6a is slidably contacted with the upper support member 6a and the lower support member 6b via the upper and lower support members 6a and 6b. Is provided with a restoring material 5 having a restoring force necessary to return to the position.

The sliding bearing 2 is composed of a sliding member 3 made of metal (for example, a mirror-finished stainless steel plate) and a sliding member 4 made of synthetic resin (for example, ethylene tetrafluoride resin). 4 are fixed to the lower end surface of the upper support member 6a and the upper end surface of the lower support member 6b.

The upper support member 6a and the lower support member 6b
An upper anchor plate 7a and a lower anchor plate 7b are respectively provided for the support portions of the upper structure A and the lower structure B.
A metal sliding member 3 (for example, in addition to a mirror-finished stainless steel plate, a steel plate or another steel plate) is provided on the bearing surface of the upper support member 6a fixed to the upper structure A side. (A material capable of maintaining a low coefficient of friction of the sliding member 4).

In addition to the sliding member 3 (stainless steel plate), for example, a material obtained by subjecting a steel material to a hard chrome plating treatment, a molybdenum treatment, or the like, or another material having a low friction coefficient is preferable.

Lower support member 6b fixed to lower structure B
On the bearing surface of the sliding member 4 made of synthetic resin as a sliding material.
(For example, a resin material having a low coefficient of friction or a material thereof is preferable in addition to the ethylene tetrafluoride resin).

Upper support member 6a and lower support member 6b
Is formed in a size and a shape to surround the outer peripheral surface of the restoring material 5, and the center of the inner peripheral side thereof has a stationary sliding bearing 2.
And a restoration material 5 (for example, a rubber material) formed in a size and shape that can be stored in the inner central portion.

The upper and lower end surfaces of the restoration material 5 are
And, it is integrally fixed to the upper end surface of the upper anchor plate 7a attached to the lower structure B and the central supporting surface of the lower end surface of the lower anchor plate 7b.

The restoring member 5 is made of, for example, a columnar elastic body, ie, a columnar elastic body made of a rubber material, a columnar rubber material having metal plates arranged in parallel, a coil spring made of steel, a plate spring made of steel, or another upper structure. A thing like a horizontal spring which can obtain the restoring force required to return A to the original position is good. Note that the restoring force is adjusted by arbitrarily changing the contact resistance (friction resistance) generated between the sliding members 3 and 4 and the restoring force of the restoring material 5 itself.

The illustrated embodiment is configured as described above, and the seismic isolation operation of the bearing device 1 will be described below. At the time of the earthquake, as shown in FIGS.
The upper members A and the lower members B are displaced in the same direction in order to transmit the earthquake displacement to the upper members A by integrally moving the sliding members 3 and 4 constituting Is done.

When the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide, the upper and lower supporting members 6a and 6b are repeatedly displaced in arbitrary directions with the restoring member 5 as a center, and the horizontal stress (horizontal stress) is changed. Since the sway is attenuated, the sway applied to the upper structure A is reduced. When the upper support member 6a is displaced in an arbitrary direction, the upper support member 6a and the lower support member 6b abut against the restoring member 5 disposed inside the upper support member 6a, and the displacement amount W is regulated to a preset displacement amount.

Before the upper structure A comes to a standstill, the restoring material 5
Displacement W generated between the sliding members 3 and 4 due to the restoring force of
Only the upper structure A is moved, and the upper structure A is returned to the original position. At the same time, the sliding member 3 is returned to a state substantially matching the center of the sliding member 4.

As described above, due to the restoring force of the restoring material 5,
Since the upper structure A is moved by the generated displacement W and the upper structure A is returned to the original position, the position and posture of the upper structure A are stabilized. In addition, since the sliding members 3 and 4 return to a position and a state where their centers are substantially coincident with each other, the displacement direction and the displacement range of the support member are not limited as in the conventional example, and the displacement in all directions (horizontal direction). Therefore, the seismic isolation effect of reducing the sway in all directions applied to the upper structure A after the vehicle stands still can be reliably obtained.

Moreover, since the load of the upper structure A is applied to the upper and lower support members 6a and 6b, almost no load is applied to the restoration member 5, and creep may occur in the restoration member 5 as in the conventional example. The restoring force can be reliably prevented from lowering, and the seismic isolation function of the sliding bearing 2 and the restoring function of the restoring material 5 can be stably obtained.

Further, the upper and lower sliding members 3 and 4 are displaced in an arbitrary direction with the restoration member 5 as a center, and are returned to a position and a state where their centers are substantially coincident with each other. When displaced, the sliding member 3 comes into contact with the restoring member 5 disposed inside thereof and regulates the displacement amount to a preset amount W, so that the sliding members 3 and 4 are separated or the bearing function is impaired. Can be reliably prevented, and the function can be maintained and stabilized.

FIGS. 4, 5, and 6 show upper and lower support members 6a,
The bearing device 1 of the second embodiment in which a ring-shaped restoring material 5 formed in a size and a shape whose outer peripheral surface is surrounded outside the outer peripheral surface of the bearing 6b is shown. When the sliding members 3 and 4 are allowed to slide, the sliding members 3
Is repeatedly displaced in an arbitrary direction to reduce the lateral sway applied to the upper structure A.

When the sliding member 3 is displaced in an arbitrary direction, the sliding member 3 and the upper supporting member 6a and the sliding member 4 and the lower supporting member 6b abut against the restoring member 5 disposed outside the sliding member 3,
The displacement W is regulated by a preset displacement W. In addition, before the upper structure A is stopped, the upper structure A is returned to the original position by the restoring force of the restoring material 5, so that the position and posture of the upper structure A are stabilized, and the first embodiment differs from the first embodiment. Equivalent effects can be obtained.

Further, as shown in FIG.
Even if a plurality of restoring members 5 are arranged at predetermined intervals in the circumferential direction around the supporting members 6a and 6b outside the a and 6b, the same operation and effect as described above can be achieved. .

FIG. 8 and FIG. 9 show a plurality of sliding members 3 and 4 formed by fixing the sliding members 3a and 4a to the upper and lower end surfaces of the intermediate support member 6c, and restoring them to the inner peripheral center thereof. 3 shows a bearing device 1 according to a third embodiment in which a member 5 is disposed, and a sliding bearing 2 is formed by slidingly contacting sliding members 3 and 4.

When the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide during the occurrence of the earthquake, the plurality of supporting members 6a, 6b and 6c or the sliding members 3 and 4 are moved in the same direction or in any direction. Since it is repeatedly displaced and displaced by an arbitrary direction and an arbitrary amount of movement, the roll applied to the upper structure A is greatly reduced, and the seismic isolation function is improved.

At the same time, the sliding members 3 and 4 move by the displacement amount W, so that the displacement amount W is larger than that of displacing one sliding bearing as in the second conventional example, and the roll is large. The effect of seismic isolation is obtained.

In addition, the sliding members 3 and 4 of all or arbitrary stages come into contact with the restoring member 5 and are regulated to the displacement amount W set in advance. Before the upper structure A comes to rest, the restoring force of the restoring material 5 causes the upper structure A to move by the amount of displacement W generated on the plurality of sliding bearings 2 and returns the upper structure A to the original position. The position and posture of the upper structure A are stabilized, and the same operational effects as those of the first embodiment can be obtained.

Further, as in the second embodiment described above, a ring-shaped restoring member 5 formed in a size and shape surrounding its outer peripheral surface is arranged outside the plurality of sliding bearings 2. The same operation and effect as described above can be obtained.

FIGS. 10 and 11 show a regulating portion 8 for regulating the displacement W of the sliding member 3 on the lower peripheral edge of the upper anchor plate 7a corresponding to the outer peripheral edge of the upper sliding member 3.
Is formed continuously, and when the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide, the sliding member 3 is repeatedly displaced in an arbitrary direction to form the upper structure. Reduce the rolling applied to A.

On the other hand, when the sliding member 3 moves, the regulating portion 8 formed on the upper anchor plate 7a comes into contact with the outer peripheral edges of the sliding member 4 and the supporting member 6 disposed on the lower side thereof, and is set in advance. Since the displacement is regulated by the displacement amount W, it is possible to reliably prevent the sliding members 3 and 4 from separating or the support function from being impaired.

Before the upper structure A comes to a standstill, the upper structure A is moved by the amount of displacement W generated on the sliding members 3 and 4 by the restoring force of the restoring member 5, and the upper structure A is restored to its original state. Since it returns to the position, the same operation and effect as in the first embodiment can be obtained.

The restricting portion 8 described above may be partially formed, or may be provided on the upper peripheral edge of the support member 7 corresponding to the outer peripheral edge of the sliding member 4. Action and effect can be obtained.

FIGS. 12 and 13 show the lower and upper supporting members 6a and the intermediate supporting member 6c corresponding to the outer peripheral edges of the sliding members 3 and 4 arranged on the upper side in the plurality of sliding bearings 2. The bearing device 1 of the fifth embodiment in which a regulating portion 8 for regulating the displacement amount W of the sliding members 3 and 4 is continuously formed on the peripheral portion, and the sliding members 3 and 4 are slidably contacted. Are placed in a state.

When the sliding members 3 and 4 constituting the sliding bearing 2 are allowed to slide, the plurality of sliding members 3 and 4 are displaced in the same direction or an arbitrary direction, and the upper supporting members 6a and The regulating portion 8 of the intermediate support member 6c abuts on the outer peripheral edge of the intermediate support member 6c disposed on the lower stage side, and displaces the sliding members 3 and 4 of all stages or arbitrary stages in arbitrary directions, and The sliding members 3 and 4 are set to a predetermined displacement W
(From the bottom).

Before the upper structure A comes to a standstill, the upper structure A is moved by the displacement W generated on the plurality of sliding bearings 2 by the restoring force of the restoring material 5, and the upper structure A is restored to its original state. Since it returns to the position, the same operation and effect as those of the third and fourth embodiments can be obtained.

The above-mentioned regulating portion 8 may be partially formed, or may be provided on the peripheral portion on the upper surface side of the intermediate supporting member 6c disposed on the lower side, and the same operation and effect as described above can be obtained. be able to.

Further, a ring-shaped restoring member 5 or a plurality of restoring members 5 may be disposed outside the sliding bearing 2 constituting the fourth and fifth embodiments, and the same operation as in the second embodiment. The effect can be achieved.

The present invention is not limited to the configuration of the above embodiment.

In the above-described first to fifth embodiments, the ring-shaped or disk-shaped sliding bearing 2 is used. However, for example, an elliptical, square, polygonal or other similar shape is used. The slide bearing 2 formed in an arbitrary shape may be used, and is not limited to the shape of the embodiment.

The upper and lower intermediate supporting members 6c constituting the upper and lower sliding members 3 and 4 may be formed so as to be opposed to the outer diameter of the upper and lower intermediate supporting members 6c. Is obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a bearing device according to a first embodiment.

FIG. 2 is a side view showing a returning operation of the upper structure by a restoring material.

FIG. 3 is a plan view showing a state in which a restoring material is provided inside the sliding bearing.

FIG. 4 is a side view showing a bearing device according to a second embodiment.

FIG. 5 is a side view showing a returning operation of the upper structure by the restoration material.

FIG. 6 is a plan view showing a state in which a restoring material is provided outside the sliding bearing.

FIG. 7 is a plan view showing a state where a plurality of restoring members are arranged outside the sliding bearing.

FIG. 8 is a side view showing a bearing device according to a third embodiment.

FIG. 9 is a side view showing a returning operation of the upper structure by the restoration material.

FIG. 10 is a side view showing a bearing device according to a fourth embodiment.

FIG. 11 is a side view showing the returning operation of the upper structure by the restoration material.

FIG. 12 is a side view showing a bearing device according to a fifth embodiment.

FIG. 13 is a side view showing a returning operation of the upper structure by the restoration material.

FIG. 14 is a side view showing a bearing device of a first conventional example.

FIG. 15 is a side view showing a bearing device of a second conventional example.

FIG. 16 is a side view showing a bearing device of a third conventional example.

[Explanation of symbols]

 A: Upper structure B: Lower structure W: Displacement amount 1: Bearing device 2: Sliding bearing 3, 4, Sliding member 5: Restoring material 6a, 6b, 6c: Support member 7a, 7b: Anchor plate 8: Regulator

Claims (5)

[Claims] 1. A bearing device having an upper anchor plate fixed to an upper structure and a lower anchor plate fixed to a lower structure, wherein a sliding member is arranged between the upper anchor plate and the lower anchor plate. A restoring material having an upper end surface fixed to the lower surface of the upper anchor plate and a lower end surface fixed to the upper surface of the lower anchor plate, and an upper end surface formed on the lower surface of the upper anchor plate at a predetermined distance from the restoring material. A fixed upper support member and a lower support member having a lower end surface fixed to an upper surface of the lower anchor plate, wherein a lower surface of the upper support member and an upper surface of the lower support member are slidably connected via a sliding member. A bearing device characterized by being in contact with. 2. The bearing device according to claim 1, wherein said upper support member and said lower support member are disposed so as to surround an outer periphery of said restoration member. 3. The bearing device according to claim 1, wherein the restoring member is disposed so as to surround the outer periphery of the upper support member and the lower support member. 4. The bearing device according to claim 1, wherein the sliding member interposed between the upper supporting member and the lower supporting member comprises a plurality of layers. 5. The bearing according to claim 1, wherein said upper support member, said lower support member and said sliding member are provided with regulating portions for regulating the displacement of said sliding member. apparatus.