JP2018048691A - Sliding bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a long-term change of a state of a slide face to the minimum, and to maintain original performance of a sliding bearing.SOLUTION: A sliding bearing 1 comprises a slide plate 5 having a slide face 5a, and a slide member 2 (slide material 4f) which is arranged so as to be slidable with respect to the slide plate. The sliding bearing comprises a film or a sheet 6 which is stuck to, adheres to or is placed on the slide face except for an abutment part abutting on the slide member. A substance having mold-release performance or lubrication performance may be interposed between the slide face and the film or the like. The film or the sheet can be formed of a material which is high in waterproofness and has a low-ventilation property, polyethylene terephthalate, polyurethane, polyacetal, polymethylmethacrylate, polycarbonate, polystyrene, polychlorotrifluoroethylene, nylon 6, nylon 66, nylon 11, nylon 12, polyphenylene sulfide, aromatic polyamide, aliphatic polyamide, polyacrylonitrile, rubber or the like.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sliding support, and in particular, to a sliding plate having a sliding surface mounted on one of a target object such as a structure and a base surface supporting the same, and a sliding surface mounted on the other side of the sliding plate. The present invention relates to a sliding bearing that includes a sliding member that is slidably arranged on the sliding plate and that exhibits a seismic isolation function when the sliding member slides on a sliding surface of a sliding plate in the event of an earthquake or the like.

  As an example of the sliding support, as shown in FIG. 3, a sliding member 22 comprising a flange plate 23 and a laminated rubber body 24 attached to the upper structure, and a sliding surface 25a attached to the upper structure and attached to the lower structure. There is a sliding bearing 21 formed by combining a sliding plate 25 having the above and a protective plate 28 (28A, 28B) made of a stainless steel plate for protecting the sliding surface 25a excluding the contact portion of the sliding member 22.

  In the sliding bearing 21 having the above configuration, when a large earthquake or the like occurs, after the rubber layer of the laminated rubber body 24 of the sliding member 22 is elastically deformed, a sliding material (not shown) existing on the bottom surface of the laminated rubber body 24 is removed. It slides on the sliding surface 25a of the sliding plate 25. Further, the protective plate 28 also moves following the laminated rubber body 24. Thereby, a frictional force is generated between the sliding member and the sliding surface 25a, and the horizontal force generated between the upper structure and the lower structure is attenuated.

  Patent Document 1 discloses a sliding bearing in which wax such as wax is applied on the sliding surface of the sliding plate. This wax has a releasability and is peeled off by the impact of the laminated rubber body.

JP 2006-121747 A

  In the sliding bearing shown in FIG. 3 and the sliding bearing described in Patent Document 1, the sliding surface of the sliding plate is damaged during the construction period or in service, or foreign matter accumulates on the sliding surface. Although it is possible to physically protect the sliding surface of the sliding plate, such as by preventing it, the sliding surface may be chemically changed in the long term, moisture adhering to the sliding surface, and attacks such as oxygen As a result, the surface state may change, and the original performance of the sliding bearing may not be maintained.

  Accordingly, the present invention has been made in view of the problems in the above-mentioned sliding bearing, and aims to minimize the long-term change in the state of the sliding surface and maintain the original performance of the sliding bearing. .

  In order to achieve the above object, the present invention is a sliding bearing comprising a sliding plate having a sliding surface and a sliding member that is slidably arranged with respect to the sliding surface of the sliding plate, It is characterized by comprising a film or a sheet adhered, adhered or placed on the sliding surface excluding the contact part with the sliding member. Here, a film has a thickness of about 10 μm to less than 0.2 mm, and a sheet has a thickness of about 0.2 mm to 6 mm.

  According to the present invention, the sliding surface of the sliding plate excluding the contact portion with the sliding member by the film or sheet is prevented from coming into contact with water, oxygen, water vapor, etc. Change can be minimized. In addition, when a relative displacement occurs between the sliding plate and the sliding member due to an earthquake or the like, the film or sheet is easily peeled off by the movement of the sliding member or easily follows the laminated rubber body. The movement of the member is not hindered, and the original performance of the sliding bearing can be maintained.

  In the sliding bearing, a substance having releasability or lubricity can be interposed between the sliding surface and the film or sheet. Thereby, the influence which a film or a sheet has on the sliding of the sliding member can be further suppressed.

  Further, the film or sheet can be formed of a material having high waterproofness or low air permeability, or a material having high waterproofness and low air permeability, and the film or sheet may be single or a combination of a plurality of films or sheets. (Divided ones) or multilayered ones may be used.

As described above, according to the present invention, it is possible to minimize the long-term change in the state of the sliding surface, and the movement of the sliding member is not hindered. Can be maintained.

It is a partially broken perspective view which shows one Embodiment of the sliding bearing which concerns on this invention. It is a partial cross section figure of the sliding bearing of FIG. It is a disassembled perspective view which shows an example of the conventional sliding bearing.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  1 and 2 show an embodiment of a sliding bearing according to the present invention. The sliding bearing 1 includes a flange plate 3 attached to an upper structure and a laminated rubber attached to the lower surface of the flange plate 3. Body 4, a sliding plate 5 having a sliding surface 5 a attached to the lower structure and coated with a stainless steel material on the upper surface with fluororesin 5 b, and a later-described sliding material 4 f attached to the bottom surface of laminated rubber body 4. It is comprised with the film or sheet | seat 6 affixed, closely_contact | adhered or mounted on the sliding surface 5a so that the sliding surface 5a except a contact part may be covered.

  The laminated rubber body 4 includes laminated rubber portions 4a in which rubber layers and reinforcing plates are alternately laminated, thick steel plates 4b and 4c arranged above and below the laminated rubber portion 4a, laminated rubber portions 4a and thick steel plates. It is composed of a rubber 4e that covers 4b and 4c and a sliding material 4f fixed to the lower surface of the thick steel plate 4c and is generally used. Further, a damping material may be inserted into a hole provided in the vertical direction of the laminated rubber body 4. The damping material is, for example, a mixture of a plurality of powders such as lead / tin / superplastic material or iron / rubber. Further, the laminated rubber body 4 may have a damping performance in the rubber itself. In the following description, the entire flange plate 3 and laminated rubber body 4 are referred to as a sliding member 2.

  The film or sheet 6 is made of a material having a high waterproof property and low air permeability, such as polyethylene terephthalate, polyurethane, polyacetal, polymethyl methacrylate, polycarbonate, polystyrene, polychlorotrifluoroethylene, nylon 6, nylon 66, nylon. 11, nylon 12, polyvinyl chloride, polyvinyl fluoride, polyvinylidene fluoride, polyvinylidene chloride, polyimide, polyethylene, polypropylene, ABS resin, ethylene / vinyl alcohol copolymer, polyphenylene sulfide, aromatic polyamide, aliphatic polyamide, poly It may contain a polymer material such as acrylonitrile or rubber. Moreover, you may interpose other film or sheet | seat, oil, etc. which have releasability or lubricity between the sliding surface 5a of the sliding board 5, and the film or sheet | seat 6. FIG. In addition to the above properties, the film or sheet 6 preferably has high light shielding properties, high heat resistance, high chemical resistance, high impact resistance, and high dehumidification properties.

  In addition, the film or sheet 6 is in a state where the sliding member 2 is in the initial position on the sliding surface 5a (the state shown in the figure), or the whole or part of the sliding surface 5a excluding the contact portion with the sliding material 4f. (Including division) is attached, adhered, or placed. In order to remove moisture, air, and the like from between the film or sheet 6 and the sliding surface 5a, oil can be interposed between the film or sheet 6 and the sliding surface 5a so that they are in close contact with each other.

  As described above, according to the present invention, before the occurrence of a large earthquake or the like, the sliding surface 5a excluding the contact portion with the sliding material 4f by the film or sheet 6 is water (condensation water, water leakage, rainwater, Sea water, muddy water, etc.), oxygen, water vapor, etc. can be prevented, so that the long-term change of the sliding surface 5a is minimized, and the sliding of the sliding member 2 with respect to the sliding surface 5a is minimized. Dynamic performance can be maintained.

  Further, when a large earthquake or the like occurs, the sliding material 4 f slides on the sliding surface 5 a of the sliding plate 5 after the rubber layer of the laminated rubber body 4 is elastically deformed. At this time, the sliding member 4f moves the sliding surface 5a of the sliding plate 5 while easily peeling off the film or sheet 6 or following the laminated rubber body 4, so that the film or sheet 6 causes the laminated rubber body 4 to move. Movement is not hindered.

  In addition, the sliding bearing using the wax described in Patent Document 1 as a protective material requires a force to scrape the hardened wax, and in a sliding bearing that requires a low coefficient of friction, this scraping force is the level assumed in the design. Although the force is affected, according to the present invention, the sliding material 4f moves on the sliding surface 5a of the sliding plate 5 while easily peeling off the film or sheet 6 or following the laminated rubber body 4 easily. The horizontal force assumed in the design is not affected. Further, the film or sheet 6 is peeled off or laminated with a small horizontal force by interposing another film or sheet 6 having oil releasing properties or lubricity between the film or sheet 6 and the sliding surface 5a. The rubber body 4 can be followed.

  Further, for the purpose of preventing the film or sheet 6 from being caught in the contact portion between the sliding member 4f and the sliding surface 5a when the laminated rubber body 4 is moved, the film or sheet 6 is placed on the outer peripheral portion of the laminated rubber body. It is good also as a structure which provided the anti-roll-in member or raised the edge part of the film or sheet | seat 6 of the peripheral part of a laminated rubber body.

  Furthermore, in the said embodiment, although the sliding board 5 which has the sliding surface 5a which coated the stainless steel material with the fluororesin 5b on the upper surface was illustrated, sliding of the sliding material 4f is not prevented by the film or the sheet | seat 6. As long as the original function of the sliding bearing is maintained, the sliding surface 5a may not be a surface coated with the fluororesin 5b.

  Further, the case where the sliding member 2 is fixed to the upper structure and the sliding plate 5 is fixed to the lower structure has been described. However, when the sliding support is applied to the bridge, a sufficient space is secured on the lower structure side. When applied to a structure that is difficult to do, the sliding plate 5 may be fixed to the upper structure and the sliding member 2 may be fixed to the lower structure. At this time, since the sliding surface 5a of the sliding plate 5 faces downward, the film or the sheet 6 is hardly separated from the sliding surface 5a.

  Furthermore, although the sliding bearing 1 provided with the laminated rubber body 4 on the sliding member 2 has been described, the present invention can also be applied to a sliding bearing having no laminated rubber body, in which case the sliding surface is flat. The present invention can be applied to a curved surface or a spherical surface.

In addition, the present invention is not limited to the above-mentioned sliding bearing for structures, but sliding bearings other than those for structures such as piping equipment, logistics equipment / equipment, mechanical equipment / equipment, electrical equipment / equipment, computer equipment / equipment It can be applied to furniture, furniture, exhibits, etc.

DESCRIPTION OF SYMBOLS 1 Sliding support 2 Sliding member 3 Flange plate 4 Laminated rubber body 4a Laminated rubber part 4b, 4c Thick steel plate 4e Rubber 4f Sliding material 5 Sliding plate 5a Sliding surface 5b Fluororesin 6 Film or sheet

Claims (3)

A sliding bearing comprising a sliding plate having a sliding surface, and a sliding member arranged slidably with respect to the sliding surface of the sliding plate,
A sliding bearing comprising a film or a sheet adhered, adhered or placed on the sliding surface excluding a contact portion with the sliding member.   The sliding bearing according to claim 1, wherein a substance having releasability or lubricity is interposed between the sliding surface and the film or sheet.   The sliding bearing according to claim 1 or 2, wherein the film or sheet is made of a material having high waterproofness or low breathability, or high waterproofness and low breathability.

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