JP2006257683A - Sliding bearing cover and sliding bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding bearing cover which can always maintain a friction coefficient between a sliding bearing body and a sliding surface to a constant value even in a hostile environment such as an always humid environment. <P>SOLUTION: The sliding bearing cover 24 is formed of a waterproof sheet 41 as a relatively thin external surface member, and a liquid retaining layer 42 formed of a sponge material or a nonwoven fabric as a relatively thick rear surface member, and the two members are bonded together in one body by an adhesive or the like. In order to apply a lubricant such as silicone grease to the sliding surface 22, the liquid retaining layer 42 contains therein the lubricant such as the silicone grease. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a sliding bearing device at a lower portion of a building, and covers the sliding surface in a sliding bearing device that supports the building through the sliding bearing body by a sliding surface provided on a foundation so as to be slidable. The present invention relates to a sliding support cover used and a sliding support device provided with the sliding support cover.

  In buildings, a sliding support device is used as one of the seismic isolation support devices that reduces vibration transmitted to a building by absorbing displacement caused by earthquakes or vibrations. This sliding bearing device is configured to provide a sliding bearing body at the lower part of a building and to support the building through a sliding surface provided on a foundation so as to be slidable.

Further, this sliding support device may be used together with a seismic isolation support device that can be elastically displaced in the horizontal direction, such as a laminated rubber support device. In such a sliding bearing device for construction, in order to keep the coefficient of friction constant, it is necessary to prevent water and dust from adhering to the sliding surface as much as possible. It is practiced to mount a support cover that wipes off effectively (see Patent Document 1).
JP 2001-317228 A

  However, even when the support cover is used, there is a concern that the friction coefficient becomes unstable when the environment is poor, for example, in the case of assuming a rare case such as a constantly wet environment.

  The present invention provides a sliding bearing cover and a sliding bearing device that can always maintain a constant coefficient of friction between the sliding bearing body and the sliding surface even in a poor environment such as being always wet. The purpose is to provide.

  The invention according to claim 1 is a sliding bearing device in which a sliding bearing is provided at a lower portion of a building, and the building is slidably supported by the sliding surface provided on the foundation via the sliding bearing. A sliding bearing cover used to cover the sliding surface in order to prevent water and dust from entering the surface, and a lubricant to be applied to the sliding surface is held on the surface in contact with the sliding surface. It is characterized by that.

  Next, the operation of the sliding bearing cover according to claim 1 will be described.

  In the sliding support cover according to the first aspect, the lubricant is held on the surface in contact with the sliding surface. Since the part where the lubricant is held is always in contact with the sliding surface, the lubricant can be reliably supplied to the sliding surface even during relative movement between the sliding support and the sliding surface. Even in an environment, the friction coefficient between the sliding support and the sliding surface can be kept constant over a long period of time.

  Also, since the bearing cover is always in contact with the sliding surface, it is possible to prevent foreign matter such as water and dust from adhering to the sliding surface. Even if foreign matter adheres to the sliding surface, the sliding bearing is supported when earthquake vibration occurs. By moving the body and the support cover together on the sliding surface, the influence of the foreign matter can be eliminated.

  The invention according to claim 2 is the sliding support cover according to claim 1, wherein the lubricant is silicone oil or silicone grease.

  Next, the operation of the sliding bearing cover according to claim 2 will be described.

  In the sliding support cover according to the second aspect, the friction coefficient between the supporting body and the sliding surface can be stably reduced by the action of the silicone oil or the silicone grease having a lubricating action. In addition, since the sliding bearing dislikes moisture, it is preferable to use a silicone oil or silicone grease that is stable and has a water repellent action as a lubricant.

  According to a third aspect of the present invention, in the sliding support cover according to the first or second aspect, a liquid holding member that absorbs and holds the liquid lubricant is provided on a surface facing the sliding surface. It is characterized by that.

  Next, the operation of the sliding bearing cover according to claim 3 will be described.

  In the case of using a liquid lubricant, by providing a liquid holding member, the liquid lubricant can be reliably held on the support cover for a long period of time.

  The sliding support device according to claim 4 is a sliding support device in which a sliding support body is provided at a lower portion of a building, and the building is slidably supported by the sliding surface provided on the foundation via the sliding support body. Then, the sliding surface is covered with the sliding support cover according to any one of claims 1 to 3.

  Next, the operation of the sliding support device according to claim 4 will be described.

  Since the sliding support device according to claim 4 covers the sliding surface with the sliding support cover according to any one of claims 1 to 3, the sliding support device is always in a wet environment. The coefficient of friction between the body and the sliding surface can be kept constant over a long period of time.

  As described above, since the sliding support cover of the present invention has the above-described configuration, the coefficient of friction between the sliding support body and the sliding surface is always kept constant even in an environment that is always wet. It has an excellent effect of being able to.

  In addition, since the sliding bearing device of the present invention has the above-described configuration, the friction coefficient between the sliding bearing body and the sliding surface can always be kept constant even in a constantly wet environment or the like. Has an excellent effect.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an elevational view schematically showing a building using a sliding bearing device having a sliding bearing cover to which the present invention is applied, and FIG. 2 is a longitudinal sectional view showing the sliding bearing device in FIG.

  In FIG. 1, the building 10 is seismically isolated by a plurality of sliding bearing devices 20 and a plurality of laminated rubber bearing devices 30 installed under the floor.

  In the illustrated example, the underfloor is formed between the floor surface 11 of the building 10 and the upper surface of the foundation 12 built in the ground, and each sliding support device 20 includes the lower end of the column 13 of the building and the foundation 12. And is configured between. Reference numeral 14 illustrates the ground.

  The laminated rubber support device 30 is configured by integrally fixing and joining flange members 32 and 33 to upper and lower end surfaces of a cylindrical laminated rubber portion 31, and the laminated rubber portion 31 is composed of a rubber layer and a metal or hard plastic plate. It has a structure in which reinforcing plates such as are laminated alternately and integrally.

  In the illustrated example, the laminated rubber bearing device 30 is in a state in which the building 10 is isolated and supported by fastening the upper and lower flange members 32 and 33 to the pillar 13 and the foundation 12 of the building 10 with bolts and nuts. It is attached with. Such a laminated rubber bearing device 30 has a high spring constant in the vertical direction and a low spring constant in the horizontal direction (horizontal direction). Usually, the ratio of the vertical and horizontal spring constants is as high as 800 or more. Value. Such laminated rubber bearing devices are disclosed in, for example, JP-A-60-261845, JP-A-61-14340, JP-A-64-48950, and the like.

  1 and 2, each sliding bearing device 20 slides (slids) a sliding bearing body 21 provided at the lower end portion of the column 13 of the building 10 in a horizontal direction on a sliding surface 22 provided on the foundation 12. ) It has a configuration that supports it.

  In the illustrated example, the sliding surface 22 is formed by fixing a flat plate member 23 to the upper surface of the foundation 12 and finishing the smooth upper surface of the flat plate member 23 to a low friction surface. As the material of the flat plate member 23 forming the sliding surface 22, a metal such as steel or stainless steel, a sintered alloy, PTFE resin, or the like is used, and it has excellent smoothness and low friction coefficient. The material is preferred.

  On the other hand, as the sliding surface (end surface) on the sliding bearing 21 side, a material that is the same material as the flat plate member 23 and can obtain an appropriate friction coefficient in combination with the sliding surface 22 is used.

  In the sliding bearing device 20, in order to keep the sliding characteristic (seismic isolation characteristic) constant, it is required to prevent the friction coefficient from changing due to moisture or dust adhering to the sliding surface 22 as much as possible. For the purpose, as shown in FIG. 2, a sliding support cover 24 for covering the sliding surface 22 is mounted.

  FIG. 3 is a schematic perspective view showing a partly assembled state of the sliding support device 20 having one embodiment of the sliding support cover to which the present invention is applied, and FIG. 4 is a sliding support cover in FIG. It is a typical disassembled perspective view which shows the state before the assembly | attachment of 24.

  2 to 4, the sliding support cover 24 is formed of a cover member that covers the entire surface of the sliding surface 22 in order to prevent water and dust from entering the sliding surface 22.

  In the illustrated sliding bearing device 20, the sliding bearing body 21 on the building 10 side is formed of a cylindrical member having a circular cross section. However, the flat plate member 23 forming the sliding surface 22 on the foundation 12 side has a planar shape. An octagonal member is used, and the sliding support cover 24 that covers the flat plate member 23 has an octagonal shape having an area substantially equal to or larger than the sliding surface 22 (including a sufficiently wide area). The cover member (substantially similar cover member) is used.

    Further, as shown in FIGS. 3 and 4, the sliding support cover 24 is divided into two parts (or four parts) by a cut line 27 passing through the center portion, and the cloth tape is in a state where the cut line is in close contact after being assembled at the site. (Cross tape) It is comprised so that it may integrate by couple | bonding with 28 and the improvement of the assembly workability | operativity at the time of construction is aimed at.

  In the illustrated sliding support cover 24, a joining portion reinforcing sheet 29 is fixed to a portion along the cut 27 by adhesion of a butyl adhesive or the like. Furthermore, at the substantially central portion of the sliding support cover 24, the outer diameter surface (circumferential surface) of the sliding support body 21 on the building 10 side and the waterproof and dustproof property can be secured in the assembled state (FIGS. 2 and 3). In this state, an opening 25 is formed for close fitting.

  In the embodiment shown in FIGS. 2 to 4, the sliding support cover 24 has a flat plate shape, and is used in a state of being fitted on the sliding support body 21 on the building 10 side and placed on the sliding surface 22. The

  That is, the back surface (inner surface, lower surface) of the sliding support cover 24 is placed on the sliding surface 22 and is flush with the sliding surface 22 at the peripheral edge or protrudes from the sliding surface and contacts the upper surface of the foundation 12. Yes.

  2 to 4, the sliding support cover 24 used to cover the sliding surface in order to prevent water and dust from entering the sliding surface 22 covers the sliding surface 22 (see FIG. 2 and FIG. 2). The waterproof sheet 41 forming the outer surface (front surface, upper surface in the illustrated example) in the state of FIG. 3 and the inner surface (back surface, lower surface in the illustrated example) in a state of covering the sliding surface 22 are formed. It has the structure joined integrally with the liquid retention layer 42 which consists of a sponge-like material or a nonwoven fabric.

  The waterproof sheet 41 and the liquid retaining layer 42 are joined by, for example, integrating them with an adhesive for heat fusion.

  As the waterproof sheet 41, it is desirable to use a flame retardant flame retardant sheet that is excellent in waterproof properties and also excellent in dust resistance, for example. Specific examples of this type of waterproof sheet include, for example, a color tarpaulin product number APC400F (thickness 0.35 mm) manufactured and sold by Kambo Plus Co., Ltd.

  As the liquid retaining layer 42, a layer made of a sponge-like material, a woven fabric, or a nonwoven fabric and having excellent liquid absorption and liquid retaining properties is used.

  Specific examples of this type of liquid retaining layer 42 include Fibrite (registered trademark of the company) manufactured and sold by Bridgestone Corporation. This fibrite is also used as a sound-absorbing material, and is a fiber molded body or non-woven fabric of 100% polyester fibers in which short fibers are bonded with a special fiber binder (polyester). It is a flame-retardant sponge-like (cotton-like) material that is excellent in heat resistance and liquid retention, heat insulation and breathability, and is structurally non-woven. Furthermore, the above-mentioned fibrite is a material that is easy to perform water-repellent treatment, has high durability, and is excellent in environmental properties.

  In the sliding support cover 24, the liquid retaining layer 42 having a thickness of about 20 mm to about 100 mm is usually heat-sealed on the back surface of the waterproof sheet 41 having a thickness of about 0.2 mm to about 1.5 mm. A structure fixed with an adhesive is employed.

  The liquid retaining layer 42 holds a liquid lubricant.

  Here, the liquid includes from a water-like one to a viscous grease-like one.

  As the liquid lubricant, silicone oil, silicone grease or the like can be used.

  In this embodiment, FS high vacuum grease “HIGH VACUUM (trade name)” manufactured by Dow Corning Asia Co., Ltd. is used as a lubricant, but it does not evaporate and is stable for a long time. Other materials may be used.

Note that a lubricant is applied to the entire sliding surface 22 in advance.
(Function)
According to the sliding support cover 24 described above, since the liquid retaining layer 42 holding the lubricant is always in contact with the sliding surface 22, during relative movement between the sliding support body 21 and the sliding surface 22, The lubricant can be reliably supplied to the sliding surface 22, and the friction coefficient between the sliding support 21 and the sliding surface 22 can be kept constant for a long time even in a constantly wet environment. Become.

  Further, in the present embodiment, since the water-repellent silicon grease is held in the liquid retaining layer 42, it is possible to suppress water from entering the cover.

  When the building 10 moves in the event of an earthquake, the sliding support cover 24 moves together with the sliding support body 21, so that water, dirt, etc. on the sliding surface 22 are caused by the back surface (liquid retaining layer 42) of the sliding support cover 24. The effect that it is possible to wipe off (so-called dusting effect) is also obtained.

  Further, since the sliding support cover (sheet) 24 is divided by a cut 27 extending from the opening 25 that fits into the sliding support 21 to the periphery, the sliding support 21 abuts on the sliding surface 22. In this state, the sliding support cover 24 can be easily and easily attached and removed, and the workability and handling at the time of maintenance inspection can be improved.

  That is, even in the state of FIGS. 1 and 2, the sliding support cover 24 can be easily attached to or removed from the sliding support device 20.

  In the above-described embodiment, the sliding support body 21 is formed of a cylindrical body having a circular cross section, and the planar shape of the sliding surface 22 (flat plate member 23) and the sliding support cover 24 is an octagonal shape. The shape can be selected from an arbitrary shape such as a circle, an oval, and various polygons.

It is an elevational view schematically showing a building using a sliding support device having a sliding support cover to which the present invention is applied. It is a longitudinal cross-sectional view which shows the sliding support apparatus in FIG. It is a typical perspective view which partially fractures | ruptures and shows the assembly | attachment state of the slide support apparatus which has one Example of the cover for slide supports to which this invention is applied. FIG. 4 is a schematic exploded perspective view showing a state before the sliding support cover in FIG. 3 is assembled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Building 11 Floor 12 Foundation 13 Building pillar 14 Ground 20 Sliding bearing device 21 Sliding bearing body 22 Sliding surface 23 Flat member 24 Sliding bearing cover 25 Opening 27 Cut 28 Cloth tape (cross tape)
29 sheet (for joint reinforcement)
30 Laminated rubber bearing device 41 Waterproof sheet 42 Liquid retaining layer 43 Outer peripheral end surface of liquid retaining layer

Claims (4)

In a sliding support device that provides a sliding support body at the bottom of a building and supports the building through the sliding support body by means of a sliding surface provided on a foundation, it prevents water and dust from entering the sliding surface. A sliding bearing cover used to cover the sliding surface to prevent,
A sliding bearing cover, characterized in that a lubricant applied to the sliding surface is held on a surface in contact with the sliding surface.   The sliding bearing cover according to claim 1, wherein the lubricant is silicone oil or silicone grease.   The sliding support cover according to claim 1 or 2, wherein a liquid holding member that absorbs and holds the liquid lubricant is provided on a surface facing the sliding surface. A sliding bearing device is provided at a lower portion of the building, and the sliding bearing device supports the building so as to be slidable via the sliding bearing body by a sliding surface provided on a foundation,
A sliding support device, wherein the sliding surface is covered with the sliding support cover according to any one of claims 1 to 3.

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