JP4134437B2 - Sliding bearing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding bearing device, and more particularly to a sliding bearing device having a cover.
[0002]
[Prior art]
In order to make buildings and mechanical facilities seismic isolation structures, sliding bearing devices in which sliding bearing members are slidably disposed on a smooth plate are becoming widespread. As this sliding support member, a member in which a low friction material layer such as polytetrafluoroethylene (PTFE) is provided on the lower surface of a laminate of a hard plate such as a metal plate and a soft plate such as rubber is often used. As the smooth plate, a stainless steel plate is usually used.
[0003]
In such a sliding bearing device, a laminated body on which a PTFE material is mounted slides on a counterpart stainless steel plate during an earthquake, and the seismic force is absorbed.
[0004]
If the stainless steel plate is left exposed, dust, moisture, etc. accumulate on the stainless steel plate during a long period of use, and the inherent friction characteristics of the elastic sliding bearing may vary. Therefore, a cover that covers the elastic sliding bearing is also required from the viewpoints of dust resistance, waterproofness, and appearance. As this cover, conventionally, a panel such as an acrylic plate is assembled with an adhesive or a screw.
[0005]
Japanese Patent Application Laid-Open No. 9-195577 describes a structure in which a cover made of a film-like elastic body is attached to a foundation beam supported by a sliding support member, and the entire sliding support device is covered by this cover.
[0006]
[Problems to be solved by the invention]
As with other seismic isolation laminated rubber bearings, sliding bearings require periodic inspections, as well as temporary inspections when subjected to vibrations exceeding a predetermined value.
[0007]
However, when using the above panel as a cover, care must be taken to ensure that the cover material itself is heavy and that the cover material is not damaged or cracked. The work required a great deal of labor and time, and there were cases where periodic and temporary inspections of the elastic sliding bearing could not be performed easily and quickly.
[0008]
When the entire sliding support device is covered with a cover made of a film-like elastic body as in the above-mentioned JP-A-9-195777, condensed water or the like is likely to be generated inside the cover, and it cannot be evaporated. When the upper structure and the lower structure of the building are shifted due to an earthquake or the like, there is a problem that the cover material is sandwiched between the laminated rubber of the sliding support and the stainless steel plate. Further, since the cover made of such a film-like elastic body has poor flameproofness, when a contractor performs welding work in the vicinity of the sliding bearing installation portion, there is a possibility that the welding spark may ignite the cover material.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding bearing device in which the cover material can be easily attached and detached and the sliding bearing device can be inspected efficiently.
[0010]
It is another object of the present invention to provide a sliding bearing device that does not cause condensation inside the cover (even if condensation occurs, there is room for evaporation) and is extremely excellent in long-term durability. .
[0011]
[Means for Solving the Problems]
The sliding bearing device of the present invention is a sliding bearing device having a smooth plate, a sliding bearing member slidably disposed on the smooth plate, and a cover that covers the smooth plate. body slidably disposed, in which the cover is characterized in that it is thus supported on the cover support.
[0012]
In such a sliding support device, the cover can be installed by arranging the cover on the smooth plate so that the cover is supported by the cover support, and the cover installation work is very simple. Also, this cover can be easily removed. By making this cover a heat insulating board whose upper surface is covered with a metal film (for example, an aluminum film), the weight of the cover is reduced, and the durability, waterproofness, and flameproofness of the cover are improved. . When this heat insulating board is used with an air layer secured, condensation inside the cover can be sufficiently prevented. Even if condensation occurs, there is room for evaporation.
[0013]
The cover support body includes a slide base that slides on a smooth plate and a rod that rises from the slide base, the rod passes through the cover, and the slide base supports the cover. Is preferred.
[0014]
In this case, it is preferable that the sliding support member has a flange projecting sideways, and the rod is in contact with or close to the outer periphery of the flange.
[0015]
In the present invention, the cover may be configured by connecting a plurality of cover pieces. In this case, the cover pieces are preferably connected by a metal adhesive tape such as an aluminum adhesive tape or a flat fastener (trade name magic tape).
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
FIG. 1 is a perspective view showing a sliding bearing device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a connecting structure of a cover to a sliding bearing member. 3 is a cross-sectional view taken along line III-III in FIG. 1, FIG. 4 is an enlarged view of the main part of FIG. 3, and FIG. 5 is a perspective view of the cover support.
[0018]
In this embodiment, a stainless steel smooth plate 2 is fixedly installed on a concrete base bottom plate 1. A sliding support member 3 is slidably disposed on the smooth plate 2. The sliding support member 3 includes a seismic isolation laminate 4 in which a metal plate 4a such as an iron plate and a soft plate 4b such as rubber are laminated, and a fluororesin (for example, a poly-resin) provided on the bottom surface of the laminate 4 by adhesion or the like. A sliding plate 5 made of a low friction material such as tetrafluoroethylene, and a metal flange 6 joined to the upper surface of the laminate 4 by vulcanization adhesion or the like. The flange 6 has a bolt insertion hole 7 for fixing a supported member 30 such as a building.
[0019]
As shown in FIG. 2, in this embodiment, the cover 9 is composed of a connecting body of two cover pieces 10. The cover piece 10 includes a semicircular arc-shaped concavely curved portion 11 disposed close to the outer peripheral surface of the cylindrical laminated body 4, and an upright wall 12 rising from the edge of the concavely curved portion 11. Along this standing wall 12, an insertion portion (consisting of a hole or a notch) 13 of the cover support 20 is provided.
[0020]
This cover piece 10 is comprised with the heat insulation board which consists of a flame-retardant isocyanurate foam, and the aluminum foil affixed on the upper surface of this heat insulation board. In addition, it is preferable to make an aluminum foil wrap around the end face of the heat insulation board to improve the aesthetics. A lightweight frame 15 is preferably disposed on the lower surface side of the cover piece 10.
[0021]
The cover support 20 is made of a synthetic resin such as polypropylene, and includes a slide base 22 that slides on the smooth plate 2 and a rod 21 that rises from the slide base 22. The rod 21 is inserted through the insertion portion 13, and the upper end thereof is in contact with or close to the side peripheral surface of the flange 6. The cover 9 is loaded on the slide base 22. When the sliding support member 3 slides on the smooth plate 2 due to an earthquake, the flange 6 pushes the rod 21 and the cover 9 moves together with the sliding support member 3.
[0022]
In the sliding support device configured as described above, the peripheral portion of the sliding support member 3 on the upper surface of the smooth plate 2 is covered with the cover 9, and the smooth plate around the sliding support member 3 is covered with moisture and dust. The slipperiness and the support function excellent over the long term are maintained. In particular, since the lower surface side of the cover 9 is composed of a heat insulating board having an air layer, even if dew condensation occurs inside the cover 9, there is room for the condensed water to evaporate in the air layer, which is smooth. There is no accumulation on the plate 2. For this reason, the original sliding characteristic of the elastic sliding bearing is maintained for a very long time.
[0023]
In this embodiment, the cover 9 is constituted by connecting a plurality of cover pieces 10 with a tape, and it is easy to carry the cover pieces to the site. The operation | work which arrange | positions the cover 9 so that it may surround is very easy. Note that when one cover piece 10 is damaged, it is possible to replace only the cover piece.
[0024]
In the above embodiment, two cover pieces 10 are used, but the number of cover pieces may be other numbers such as three. Moreover, you may use the cover which consists of only one sheet.
[0025]
【The invention's effect】
As described above, according to the present invention, when the sliding property between the smooth plate and the sliding support member is maintained over a long period of time by the cover, the installation and removal operations of the cover can be easily performed. In addition, according to the present invention, it is possible to prevent dew condensation inside the cover and maintain the original excellent sliding characteristics of the sliding bearing for a very long time.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a sliding bearing device according to an embodiment.
FIG. 2 is an exploded perspective view showing the sliding bearing device according to the embodiment.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is an enlarged view of a part of FIG.
FIG. 5 is a perspective view of a cover support.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base bottom board 2 Smooth board 3 Sliding support member 4 Laminated body 5 Sliding board 6 Flange 9 Cover 10 Cover piece 20 Cover support body 21 Rod 22 Slide base

Claims (8)

  In a sliding support device having a smooth plate, a sliding support member slidably disposed on the smooth plate, and a cover covering the smooth plate, a cover support is slidably disposed on the smooth plate. A sliding bearing device, wherein the cover is supported by the cover support.   2. The sliding bearing device according to claim 1, wherein the cover is made of a heat insulating board whose upper surface is covered with a metal film.   3. The sliding bearing device according to claim 2, wherein the heat insulation board has an air layer between the smooth board and the heat insulation board.   The cover support body according to any one of claims 1 to 3, comprising a slide base that slides on the smooth plate and a rod that rises from the slide base, the rod penetrating the cover, A sliding bearing device, wherein the slide base supports the cover.   5. The sliding bearing device according to claim 4, wherein the sliding bearing member includes a flange projecting sideways, and the rod is in contact with or close to an outer periphery of the flange.   6. The sliding bearing device according to claim 1, wherein the cover is formed by connecting a plurality of cover pieces.   7. A sliding bearing device according to claim 6, wherein the cover pieces are connected to each other by a metal adhesive tape, a flat fastener or the like. 8. A sliding bearing device according to claim 1, wherein the cover covers the entire surface of the smooth plate.

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