JP2001280414A - Dust cover for sliding bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy carrying, attaching, detaching, and replacing not to damage excellent dust-proof performance. SOLUTION: To isolate the vibration between a building 2 and a concrete basement 4 so that they can relatively move on each other, a sliding bearing 1 comprises a laminated rubber bearing 3 fixed to the building 2 and a sliding plate 6. The sliding plate 6 is attached to the laminated rubber bearing 3 fixed above the concrete basement 4 that opposes to the building 2 fixing the rubber bearing 3. A dust cover 10, which is oppositely placed to the sliding surface of a sliding plate 6, is made of a lightweight plastic and formed into an umbrella shape that a bottom surface 10a is a flat plate. The cover 10, enclosing the side surface of the rubber bearing 3, is divided to two parts (10A, 10B), and then united by fastening a touch-close type fastener 20. Besides, the bottom surface 10a of the cover 10 is made of a low friction material 14 and attached with a dust seal 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of foreign matter such as dust from adhering to a sliding plate of a sliding bearing device used for seismic isolation, vibration suppression, vibration isolation or vibration isolation of buildings and precision equipment. The present invention relates to a dust-proof cover for a sliding bearing device capable of preventing the sliding.

[0002]

2. Description of the Related Art A seismic isolation structure for a structure such as a building is provided with a seismic isolation layer having a horizontal rigidity much lower than the rigidity of the structure between the structure and a foundation. Conventionally, a laminated rubber bearing has been used as one of the seismic isolation layers. As a seismic isolation system using this laminated rubber bearing,
Combination of a laminated rubber bearing using natural rubber and a damper, using a high-damping rubber material as the rubber-like elastic body of the laminated rubber bearing (high-damping laminated rubber bearing), inside the laminated rubber bearing One in which a lead plug is sealed in the formed hollow portion (a laminated rubber bearing body containing a lead plug), one in which a low-friction material is provided on the sliding surface of the laminated rubber bearing body and which slides on a flat sliding plate, and the like. . Above all, the sliding bearing device has a long period of seismic isolation layer, which is effective for seismic isolation of structures, because the horizontal rigidity after the laminated rubber bearing body provided with low friction material starts sliding on the sliding plate is zero. Is attracting attention as a seismic isolation structure that can be used.

[0003] Such a sliding bearing device is usually used in combination with a laminated rubber bearing member interposed between a structure and the ground. The sliding bearing device and the laminated rubber bearing member respectively support the load of the structure and reduce the input seismic wave and can transmit the reduced seismic wave to the structure. Since these seismic isolation members each have a unique spring constant, the seismic isolation effect can be obtained by separating the natural period of the seismic isolation layer of the seismic isolation structure from the period of the earthquake. On the other hand, when the natural period of the seismic isolation layer approaches the period of the earthquake, the danger of resonance increases. The natural period of this seismic isolation layer is

[0004]

(Equation 1) Can be expressed as Here, Tf is the natural period, M is the total mass of the structure, and K is the total spring constant of the seismic isolation layer.

[0005] As can be seen from equation (1), when the mass of the structure is constant, the period can be lengthened by reducing the spring constant. Also, if the laminated rubber bearing of the sliding bearing device starts to slide on the sliding plate, the spring constant becomes zero, so that the period after yielding can be theoretically made infinite, and when sliding, , A damper effect can be obtained.

[0006] Further, the sliding bearing device combined with the laminated rubber bearing body is provided between the structure and the ground after the laminated rubber bearing body provided with the low friction material slides on a flat plate by seismic force or the like. The home position can be returned by the restoring force of the mounted rubber bearing. For this reason, the vibration period of a building built on soft ground or a relatively lightweight building can be lengthened, and the seismic isolation effect can be improved.

As shown in FIG. 4, the sliding bearing device has a laminated rubber bearing 52 fixed to an upper structure 51 and a sliding plate 54 such as stainless steel fixed to a lower foundation 53. The laminated rubber bearing body 52 is formed by alternately laminating and molding a rubber layer 523 and an intermediate steel sheet 524 between an upper steel plate 521 and a lower steel plate 522, and furthermore, PTFE (polytetrafluoroethylene) or the like slidable on the slide plate 54. The low friction material 55 is attached to the lower steel plate 522 or surface-treated. Therefore, when an earthquake occurs, slippage occurs between the low-friction material 55 and the slide plate 54, so that a seismic isolation effect can be exhibited. It should be noted that even if the sliding plate 54 is installed with a slight inclination, the laminated rubber bearing body 52 is provided with a low friction material 55.
It plays a role of a movable portion for preventing a gap from being formed between the sliding plate 54 and the sliding plate 54, a role of relaxing an impact at the beginning of sliding, absorbing a minute vibration, and the like.

The lower steel plate 52 of the laminated rubber bearing body 52
2 and the low friction material 55 are fixed with an adhesive or a bolt. At this time, as shown in FIG.
2, a recess 522a may be formed, and the low friction material 55 may be fitted into the recess 522a with an adhesive or a bolt. The role of this fitting structure is that when the laminated rubber bearing body 52 is horizontally deformed during an earthquake, the low friction material 5 is used.
5 is transmitted to the lower steel plate 522, and the low friction material 55 is
The purpose of the present invention is to prevent a creep phenomenon (cold flow) in which the thickness is reduced by spreading in 2a.

When such a sliding bearing device 50 is used in an environment exposed to the atmosphere, such as an underground pit, the sliding plate 5
In some cases, dust and dust may adhere to or accumulate on the surface of No. 4. When seismic force is applied in this state, the low friction material 55 and the sliding plate 54 slide without biting the greeting with a small amount of greeting, but depending on the state of adhesion and accumulation, the greeting may be bitten. Thus, it has been confirmed that the sliding plate 54 is scratched, the friction coefficient increases, and the seismic isolation effect decreases.

Therefore, in order to prevent the intrusion of greetings and dust, a seismic isolation structure (Japanese Patent Application Laid-Open No. 9-195577), a cover of the seismic isolation structure (Japanese Patent Application Laid-Open No. 10-306617) or a sliding bearing structure is required. Shaking cover (Japanese Patent Laid-Open No.
No. 42 gazette) has been proposed. Each of them has a dustproof cover for covering the sliding plate. An acrylic plate or a steel plate is used as the dust-proof cover.
2 (or the upper structure 51) is fixed by a screw member such as a bolt (see FIG. 4). Further, since the peripheral edge of the dustproof cover 56 is folded downward, and the gasket 57 is fixed to the folded piece 56a, the gap formed between the dustproof cover 56 and the sliding plate 54 can be filled.

[0011]

Such a sliding bearing device comprises a low friction material 55 and a sliding plate 54 of a laminated rubber bearing 52.
Therefore, it is necessary to remove the dustproof cover 56, and to replace the dustproof cover 56 when it is damaged during an earthquake.

However, since the dustproof cover 56 is fixed to the laminated rubber support 52 (or the upper structure 51) by a screw member such as a bolt, the removal and replacement of the dustproof cover 56 can be performed in a short time. It was difficult to do easily. In particular, when the slide bearing device is installed in a narrow underground pit, workability has been extremely poor. Further, when the dust-proof cover is made of a steel plate, the dust-proof cover becomes heavy, so that considerable work is required for removing and replacing the dust-proof cover.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and a dust-proof sliding bearing device which can be easily transported, mounted, removed and replaced without deteriorating excellent dust-proofing properties. The purpose is to provide a cover.

[0014]

The dust cover of the sliding bearing device according to the present invention, which achieves the above object, has a structure in which the upper structure and the lower structure are vibration-insulated so as to be relatively displaceable from each other. And a sliding plate fixed to the lower structure opposite to the upper structure to which the bearing is fixed, and provided with a sliding plate to which the bearing is abutted. A dustproof cover disposed opposite to the surface, which is formed of a lightweight resin member in the shape of an umbrella having a flat bottom surface, surrounds the side surface of the support body, and is divided at least at one portion. It is integrated.

According to such a dust-proof cover of the sliding bearing device, the dust-proof cover is placed on the sliding plate, and the divided portion of the dust-proof cover is fitted into the support body. It can be integrated simply by fastening.
In addition, when removing and replacing, it is only necessary to remove the fastening member, divide the dustproof cover, and shift it from that position.
Therefore, it is possible to easily carry, attach, remove, and replace the dustproof cover in a place where the device is installed, for example, in a narrow underground pit. If a plurality of dividing portions are provided, the dustproof cover can be divided, so that only the dustproof cover at the corresponding portion can be removed and replaced.

In the dustproof cover of the sliding bearing device according to the present invention, it is preferable that the resin member is filled in a bag. Thus, if a plurality of granular materials are used as the resin member, the dust cover can be formed into an arbitrary shape according to the situation at the site.

In the dustproof cover of the sliding bearing device according to the present invention, the fastening member is preferably a touch-close type fastener. Thereby, the dustproof covers can be easily attached and detached.

Further, in the dustproof cover of the sliding bearing device of the present invention, a dust seal for shielding the sliding surface of the sliding plate from the outside is provided on the periphery of the bottom surface integrated with the fastening member to surround the side surface of the supporting body. Preferably, it is provided. Thereby, a minute gap between the bottom surface of the dust-proof cover and the slide plate can be sealed, so that intrusion of greetings and dust can be prevented.

Further, it is preferable that a low friction material is provided on the bottom surface of the dustproof cover of the sliding bearing device of the present invention. Thus, the dust cover can slide more smoothly during an earthquake, and damage to the dust cover can be prevented as much as possible.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a dust cover of a sliding bearing device according to the present invention will be described below with reference to the drawings.

The sliding bearing device provided with the dust-proof cover of the present invention is a device for vibrationally insulating the upper structure and the lower structure so that they can be relatively displaced from each other. As shown in FIG. Laminated rubber bearing 3 fixed to a certain building 2
And a sliding plate 6 fixed to a concrete foundation 4 as a lower structure, and a laminated rubber bearing 3 fixed to a building.
Is mounted on a sliding plate 6 fixed to a concrete foundation 4.

The laminated rubber bearing body 3 is formed by alternately laminating and molding a rubber layer 33 and an intermediate steel plate 34 between an upper steel plate 31 and a lower steel plate 32, and further comprises a low friction material 7 slidable on the slide plate 6. It is attached to the lower steel plate 32 or surface-treated. The upper steel plate 31 is formed in such a size that it functions as a flange for fixing the laminated rubber bearing body 3 to the building 2 with bolts and flat washers. In the rubber layer 33,
Synthetic rubber such as natural rubber or chloroprene rubber having excellent elasticity is used.
For the second and intermediate steel plates 34, steel plates are usually used because of their adhesion to the rubber layer 33, but stainless steel plates, nickel plates, copper plates, brass plates or nickel-plated, copper-plated, brass-plated steel plates, or hard plates Plastics and the like can also be used. The laminated molding of the laminated rubber support 3 is preferably performed by vulcanization bonding, but may be performed by non-adhesion, partial adhesion or post-adhesion. The low-friction material 7 may be formed by coating a fluorocarbon resin such as polytetrafluoroethylene on the lower steel plate 32 of the laminated rubber support 3 or by attaching a plate made of a fluorocarbon resin, a polyacetal plate, or a high-molecular polyethylene.

The sliding plate 6 is fixed on a base plate 8 embedded in a state exposed to the concrete foundation 4 with fixing members such as bolts. As a material of the sliding plate 6, a stainless steel plate is used in consideration of rusting due to moisture or the like, and particularly, a material whose surface is mirror-finished by buffing or the like (# 400 finish) is often used. , A fluororesin or the like, or a clad steel. Here, the clad steel is a clad made of a steel material as a base material, a metal being entirely covered with another metal, and a boundary surface thereof being joined in a metallographic manner.
The sliding plate 6 may be made of engineering plastic, non-ferrous metal, or the like as long as it can maintain rigidity.

The sliding bearing device 1 thus configured is provided with a dust-proof cover 10 that covers the sliding plate 6.
The dustproof cover 10 is formed in an umbrella shape having a flat bottom surface 10 a, surrounds the side surface of the laminated rubber support 3, and the bottom surface 10 a is arranged to face the sliding surface of the sliding plate 6. Specifically, it projects obliquely downward from the position of the upper steel plate 31 of the laminated rubber bearing 3 toward the slide plate 6.
The lower portion of Ob is in contact with the bottom surface 10a, and the upper portion is in contact with the upper steel plate 31 of the laminated rubber bearing body 3. In addition, the inner peripheral surface 10c surrounding the side surface of the laminated rubber bearing 3 of the dustproof cover 10 has a seat capable of covering the peripheral edge of the upper steel plate 31 in a tightly contacted state in order to improve assemblability and dustproofness. A boring 10d is provided. Dust cover 10
Is formed in such a shape, the sliding surface of the sliding plate 6 can be covered. The dust cover 10
May be a circle or a polygon such as a square when viewed from the top, and is determined based on the shape and size of the laminated rubber support 3 and the slide plate 6.

Further, as shown in FIG. 1B, the dust-proof cover 10 is divided into, for example, two parts, and these two dust-proof covers 10A and 10B themselves are fastened by fastening members 20 and integrated. The dust-proof cover 10 is made of a lightweight resin member. For example, as shown in FIG. 2A, a plurality of foamed plastic particles 11 and a bag-like body filled with the plurality of foamed plastic particles 11 are provided. P formed in
It is preferably made of a cloth 12 coated with VC (vinyl chloride) or the like. This is the dust cover 10A, 1
This is because OB can be formed in any shape according to the situation at the site. In addition, PVC is suitable as a coating material for the cloth 12 because the secular change due to exposure is small and a compound having self-digestibility can be obtained. The raw material of the foamed plastic particles 11 as the granular material is polyurethane, polystyrene, polyethylene,
Polypropylene, polyvinyl chloride, or the like is used, but plastic beads of a size that can be filled instead of foamed plastic particles may be used. The cloth 12 as a bag-like body
Is made of a plastic fiber cloth such as nylon or polyester, cotton canvas, or the like, and is formed into a predetermined shape. If the bag-like body 12 is filled with a plurality of foamed plastic particles 11, it can be expanded to a predetermined shape.

The fastening member 20 is, as shown in FIG.
2 consisting of a bag-like body 12 filled with the above-mentioned granular body 11
A touch-close type fastener that can easily attach and detach the two dustproof covers 10A and 10B is preferable. Here, the touch-close type fastener is a combination of a tape 21 made of a pile fabric and a tape 22 formed with an engaging member which is caught by a loop of the pile fabric and is not easily removed. is there. Then, these tapes 21 and 22 are separately separated into two dustproof covers 10A and 10A.
Fix to 0B. Thereby, these tapes 21, 2
Two dustproof covers 10A, 1
0B can be fastened, and the fastening state of the two dustproof covers 10A and 10B can be released only by peeling off the tapes 21 and 22. Furthermore, the two dustproof covers 10A, 10A,
Since the gap between B can be covered, the dustproofness is improved.

As shown in FIGS. 1 (a) and 1 (c),
A fastening member 20 for surrounding the side surface of the laminated rubber bearing body 3
A dust seal 13 is provided on the periphery of the bottom surface 10a of the dustproof cover 10 integrated with the above, to block the sliding surface of the sliding plate 6 from the outside. The dust seal 13 is for sealing a minute gap between the bottom surface 10a of the dust cover 10 and the slide plate 6, and is preferably a member having excellent sealing properties, such as a felt cloth. As a result, intrusion of dust can be prevented.

Further, two dustproof covers 10A, 10B
Each of the bottom surfaces 10a is provided with a low friction material 14 as necessary. As the low friction material 14, it is conceivable to coat each bottom surface 10a with a fluororesin such as polytetrafluoroethylene. Thereby, the sliding of the dust-proof covers 10A and 10B at the time of an earthquake becomes smoother, so that damage to the dust-proof covers 10A and 10B can be prevented as much as possible.

The two dustproof covers 1 thus formed
0A and 10B can be attached after the sliding bearing device 1 is installed in an underground pit or the like. This is because it is formed of a lightweight resin member.
OB can be easily transported, mounted, removed, and replaced. That is, the two dustproof covers 10A and 10B are placed on the slide plate 6 so as to face each other with the laminated rubber support 3 as a center, and each is moved to the laminated rubber support 3,
The two dustproof covers 10A and 10B can be fastened by overlapping the fastening members 20 of the touch-close type fastener. Also, dust cover 10A, 10B
When removing and replacing, the fastening state of the two dustproof covers 10A and 10B can be released only by peeling off the fastening member 20 of the touch-close type fastener. Thereby, the removal and replacement work can be easily performed in a short time without removing the entire dustproof cover, so that workability and maintainability are improved.

In such a sliding bearing device 1, the laminated rubber bearing body 3 normally supports the vertical load of the building 2 without buckling. In the event of a small or medium earthquake, the laminated rubber bearing 3
Is deformed horizontally to absorb seismic force. Therefore, in any case, since the laminated rubber bearing body 3 does not slide on the slide plate 6 due to the frictional force, the dustproofness of the dustproof cover 10 is maintained. As a result, dust does not accumulate on the slide plate 6. On the other hand, at the time of a large earthquake, the laminated rubber bearing body 3 is horizontally deformed, and the horizontal load applied to the laminated rubber bearing body 3 exceeds the frictional force, so that the laminated rubber bearing body 3 slides on the slide plate 6. . At this time, the dustproof covers 10A and 10B slide on the slide plate 6 integrally with the laminated rubber bearing body 3. Further, even if one or both of the two dustproof covers 10A and 10B are damaged, the replacement work can be easily performed because of the above configuration.

In the embodiment of the present invention,
A dust-proof cover composed of a plurality of granules and a bag filled with the plurality of granules has been used. However, the present invention is not limited to this. A sponge made of a synthetic resin may be used. In this case, FIG.
As shown in (b), a mold 200 in which a cavity 201 having a predetermined shape of a dustproof cover as described above is formed in advance, and the bag-like body 1 is inserted into the cavity 201 of the mold 200.
By inserting the foam resin pellets 16 into the bag-like body 15 and performing foam molding, a dustproof cover in which the bag-like body 15 is filled with a sponge is obtained. Also, what is filled in the bag-like body may be a gas such as air, or it can be carried lightly, and if it is easy to attach, remove, and replace it, a dustproof cover made of only foamed plastic may be used. Good.

In the embodiment of the present invention,
Although a touch-close type fastener was used as the fastening member, the invention is not limited to this, and a fastener made of plastic, metal, or the like that opens and closes a cloth tape with an implanted slider with a slider may be used. A fixed band may be used as long as it can be attached and detached. As shown in FIG. 3, the fixing band is provided with dustproof covers 100A and 100A.
B is formed with a holding portion 100a for fitting to one part of a building or a laminated rubber bearing. After the holding portion 100a is fitted to a part of a building or a laminated rubber support, the holding portion 100a can be mounted simply by tightening the holding portion 100a with the fixing band 101.
It can be removed or replaced simply by loosening and removing.

In the embodiment of the present invention,
Although the dust cover was divided into two parts, the present invention is not limited to this. If at least one part of the dust cover was cut off, the dust cover was removed.
Exchange can be easily performed. The number of divisions is determined according to the installation environment and the maintenance environment of the sliding bearing device 1.

Further, in the embodiment of the present invention, the dustproof cover is provided on the laminated rubber bearing. However, the present invention is not limited to this, and the same effect can be obtained by providing the dustproof cover on a bearing made of only a rigid material such as steel. It goes without saying that you can get

[0035]

As described above, according to the dustproof cover of the sliding bearing device of the present invention, the dustproof cover is divided into at least two parts by using a lightweight resin member, and these dustproof covers themselves are respectively fastened by fastening members. As a result, the dust cover can be carried lightly. This allows the dust cover to be transported, mounted, removed,
Since replacement can be easily performed, workability and maintainability can be improved, and material cost and work cost can be reduced as compared with the conventional dustproof cover.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a preferred embodiment of a dustproof cover of a sliding bearing device of the present invention, wherein (a) is a side view,
(B) is a reduced view showing the upper surface of (a), and (c) is a partially enlarged view of part A described in (a).

FIGS. 2A and 2B are detailed views of a dustproof cover of the sliding bearing device of the present invention, wherein FIG. 2A is a cross-sectional view and FIG.

FIG. 3 is an explanatory view showing another embodiment of the dustproof cover of the sliding bearing device of the present invention.

FIG. 4 is an explanatory view showing a dustproof cover of the conventional sliding bearing device.

FIG. 5 is an explanatory view showing a state in which a lower steel plate and a low friction material of a laminated rubber bearing used in a sliding bearing device are joined.

[Explanation of symbols]

1 · · · · · · sliding bearing device 2 · · · · · · · · · building (upper structure) 3 · · · · · laminated rubber bearing 4 · · · · · · concrete foundation (lower structure) 6 · · · · Slip plate 10, 100 Dust-proof cover 10a Bottom surface 11 Plastic foam granules (granular body) 12 Bag-shaped body 13 Dust seal 14 ·······································································································

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D046 DA13 2E001 DH23 FA21 GA13 GA20 GA48 HD01 HD11 MA01 3J048 AA01 AC01 BA08 BB03 DA03 EA38

Claims (5)

[Claims] 1. A support fixed to the upper structure and an upper structure to which the support is fixed in order to insulate the upper structure and the lower structure from vibration relative to each other. A sliding cover fixed to the lower structure and provided with a sliding plate to which the bearing is brought into contact, the dustproof cover being disposed to face the sliding surface of the sliding plate, and a lightweight resin member. A sliding support device characterized by being formed in an umbrella shape having a flat bottom surface, surrounding the side surface of the support body and being divided at least at one portion, and the divided portion being integrated by being fastened with a fastening member. Dust cover. 2. A dustproof cover for a sliding bearing device according to claim 1, wherein said resin member is filled in a bag-like body. 3. The dustproof cover of a sliding bearing device according to claim 1, wherein said fastening member is a touch-close type fastener. 4. A dust seal for shielding the sliding surface of the slide plate from the outside is provided on a periphery of the bottom surface integrated with the fastening member to surround the side surface of the support body. The dustproof cover of the sliding bearing device according to any one of claims 1 to 3, wherein: 5. A dustproof cover for a sliding bearing device according to claim 1, wherein a low friction material is provided on said bottom surface.