JP2010059739A - Sliding rubber bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding rubber bearing that can minimize an increase of the number of components and an increase of the height of rubber shoes. <P>SOLUTION: The sliding rubber bearing 1 has a lower shoe 11, a rubber shoe 20 and an upper shoe 30. In the rubber shoe 20, an upper face reinforcing plate 23 arranged on the upper face, and a plurality of internal reinforcing plates 22 embedded inside, are laminated with sheet-like rubber bodies 21 held in between, and integrally formed in vulcanization molding. The side edges of the upper face reinforcing plate 23 are projected in hood shape from the peripheries of the rubber bodies 21, and side blocks 12 fixed to the lower shoe 11 intrude into cutout parts 25 formed at the projecting parts, and are restricted to be substantially unmovable in the horizontal direction. The upper face of the upper face reinforcing plate 23 is formed with an upper face recess 24, and a sliding plate 40 made of Teflon (R) is fitted into the recess and bonded. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sliding rubber bearing, and more particularly to a sliding rubber bearing that is installed between an upper structure such as a bridge girder of a bridge and a lower structure such as a bridge pier so as to be capable of relative movement in a bridge axis direction.

  In recent years, an elastic rod that connects a lower rod fixed to a bridge pier and an upper rod fixed to a bridge girder (same as an elastic bearing device) prevents a reduction in bearing area due to shear deformation, and thus does not cause shear deformation. The invention as described above is disclosed (for example, see Patent Document 1).

Japanese Patent No. 2849701 (page 3-4, FIG. 1)

In the invention disclosed in Patent Document 1, a rubber mallet, which is a laminated rubber in which a plurality of metal reinforcing plates are embedded at the time of vulcanization molding, is placed on the upper surface of the lower collar. Then, an intermediate plate restrained so as to be substantially immovable in the horizontal direction (strictly, slightly moving) is placed on the rubber bowl, and Teflon (registered) is placed in the recess formed on the upper surface of the intermediate plate. Trademark) board is fitted and bonded. Therefore, the Teflon (registered trademark) plate comes into contact with the stainless steel plate constituting the lower surface of the upper collar and slip occurs at the corresponding contact portion, so that the rubber collar does not undergo shear deformation.
However, since a new intermediate plate is placed on the upper surface of the rubber bowl, not only the number of parts is increased, but the distance between the upper surface of the lower collar and the lower surface of the upper collar (hereinafter referred to as “the height of the rubber bowl”). However, when there is a height restriction in replacement work or the like, there is a problem that application of the invention is limited.

  The present invention solves such a problem, and an object of the present invention is to provide a sliding rubber bearing capable of suppressing an increase in the number of parts and an increase in the height of a rubber hook.

(1) A sliding rubber bearing according to the present invention is installed in a lower structure, a rubber collar placed on the lower collar, a rubber collar placed on the lower collar so as to be relatively movable, and installed on an upper structure. An upper arm, and
The rubber bowl is integrally formed at the time of vulcanization molding by laminating a sheet-shaped rubber body with an upper surface reinforcing plate arranged on the upper surface and a plurality of internal reinforcing plates embedded inside,
The upper surface reinforcing plate is characterized in that a side edge protrudes in a bowl shape from the periphery of the rubber body, a concave portion is formed on the upper surface, and a slip plate is fitted and bonded to the concave portion.
(2) The upper surface reinforcing plate is substantially immovable in the horizontal direction by the horizontal direction restraining means.
(3) Further, the sliding plate is formed of a fluororesin.

(I) Since the sliding rubber bearing according to the present invention has the above-described configuration, it does not have a separate member (such as the intermediate plate in Patent Document 1) from the rubber cage, so that the number of parts can be reduced and the manufacturing cost can be reduced. be able to.
(Ii) Further, since the upper surface reinforcing plate is restrained so as to be substantially immovable in the horizontal direction, shear deformation of the rubber hook is prevented.
(Iii) Furthermore, since the sliding plate is formed of a fluororesin, the frictional resistance is small, and the relative movement of the upper eyelid becomes easy.

[Embodiment 1]
1 to 3 illustrate a sliding rubber bearing according to Embodiment 1 of the present invention. FIG. 1 is a schematic plan view, and FIG. 2 (a) is a side view in the direction of the bridge axis. 2 (b) is a partially enlarged view of FIG. 2 (a), FIG. 3 (a) is a cross-sectional view taken along line AA in FIG. 2 (a), and FIG. 3 (b) is FIG. It is BB sectional drawing in (a).
In FIGS. 1 to 3, the sliding rubber bearing 1 is movable relative to a lower rod 11 installed in a lower structure (not shown) of the bridge, a rubber rod 20 placed on the lower rod 11, and the rubber rod 20. And an upper collar 30 placed on the machine. In the drawing, the lower rod 11, the rubber rod 20, and the upper rod 30 are collectively used as the entire support 10.

(Slip rubber bearing)
The entire support 10 includes a rectangular plate-shaped lower rod 11 and a pair of side blocks 12, and a mounting bolt 13 connects the lower rod 11 and the side block 12.
The side block 12 includes a prism portion 12b having a flange portion 12a formed at the upper end, and mounting flange portions 12c (mounting holes are formed) formed on both sides of the prism portion 12b in the bridge axis direction. is doing.
The lower rod 11 is connected to a lower structure (not shown) by an anchor bolt (not shown), and the upper rod 30 is connected to an upper structure (not shown) by an attaching bolt 33 or an uncover (not shown). Yes. In addition, this invention does not limit the connection point, For example, welding, a normal volt | bolt, etc. may be sufficient.

(Rubber bowl)
The rubber bag 20 is formed by laminating an upper surface reinforcing plate 23 disposed on the upper surface and a plurality of internal reinforcing plates 22 embedded inside with a sheet-like rubber body 21 interposed therebetween, and integrally formed during vulcanization molding. Is formed. The upper reinforcing plate 23 has a side edge protruding like a bowl from the periphery of the rubber body 21, an upper surface recess 24 is formed on the upper surface, and a slip plate 40 made of Teflon (registered trademark) or the like is fitted into the recess and bonded. ing.
A rectangular notch 25 is formed in the center of the bridge axis direction on both side edges of the upper surface reinforcing plate 23, and the rectangular column part 12 b of the side block 12 enters the notch 25.
Therefore, the upper surface reinforcing plate 23 is restrained in the horizontal direction so as not to move in the pair of cutout portions 25 by the prism portion 12b (exactly, since there is a play (clearance) between the two, only the play amount) Can move).

(Upper)
The upper collar 30 includes a rectangular plate upper collar base 32, upper collar flanges 31 formed on both side edges of the upper collar base 32, and mounting screw holes for attaching to an upper structure formed on the upper collar base 32. And a mounting bolt 33 which is screwed to (not shown).
The side ends of the upper flange 31 are guided by the prisms 12b of the pair of side blocks 12 so as not to move in the direction perpendicular to the bridge axis but to move in the bridge axis direction. Further, the upper surface of the upper flange 31 is guided by the flanges 12a of the pair of side blocks 12 so as not to float upward.

(Slip board)
The sliding plate 40 is a rectangular (or circular) plate material, and is fitted and bonded in a state of slightly protruding from the concave portion 24 of the upper surface reinforcing plate 23. At this time, the sliding plate 40 may be composed of a plurality of plate members (and accordingly, the recesses 24 are formed by the plurality of recesses), and a common plane may be formed by the upper surfaces of the plurality of plate members. .
Further, the material for forming the sliding plate is not limited to a fluororesin such as Teflon (registered trademark). For example, any resin or metal (for example, oilless metal) may be used as long as it has a predetermined pressure strength and friction coefficient.

Therefore, since the sliding rubber support 1 does not have a member (such as an intermediate plate in Patent Document 1) separate from the rubber bowl, the number of parts can be reduced and the manufacturing cost can be reduced.
Further, since the sliding plate 40 is formed of a fluororesin (for example, Teflon (registered trademark)), the sliding between the sliding plate 40 and the upper collar 30 is facilitated.

(Horizontal restraint)
As described above, the horizontal direction restraining means is connected to the rectangular notch 25 formed in the center in the bridge axis direction on both side edges of the upper surface reinforcing plate 23 and the lower collar 11 (connected to the lower structure). However, the present invention is not limited to this.
For example, the position of the notch 25 may deviate from the center in the bridge axis direction. Moreover, it replaces with a notch part and the protrusion part to the side may be provided in the upper surface reinforcement board 23, and the latching member latched to this may be provided in the lower collar 11. Moreover, a through-hole may be provided in the upper surface reinforcing plate 23, and a column penetrating through the lower collar 11 may be provided (a single rectangular cross-section column may be passed through the through-hole having a rectangular cross section). Further, abutting members that abut on the respective side end surfaces of the upper surface reinforcing plate 23 (for example, four rectangular columns arranged in a cross shape, a pair of L-shaped columns having a cross section that abuts diagonal corners, etc.) May be provided on the lower arm 11.

  Since the present invention is as described above, the height of the rubber ridge is suppressed, the durability is excellent, and the manufacturing cost can be reduced. Therefore, the civil engineering structure and the building structure of various forms as well as the bridge are supported in an earthquake resistant manner. Can be widely used as a device.

The top view explaining the sliding rubber bearing which concerns on Embodiment 1 of this invention. The side view seen in the bridge axis direction explaining the sliding rubber bearing shown in FIG. Sectional drawing of planar view explaining the sliding rubber bearing shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding rubber bearing 10 Whole bearing 11 Lower collar 12 Side block 12a Collar part 12b Square column part 12c Mounting flange part 13 Mounting bolt 20 Rubber bowl 21 Rubber body 22 Internal reinforcement board 23 Upper surface reinforcement plate 24 Upper surface recessed part 25 Notch part 30 Top ３１ 31 Upper 沓 flange 32 Upper 沓 base 33 Mounting bolt 40 Sliding plate

Claims (3)

A lower rod installed on the lower structure, a rubber cage placed on the lower cage, and an upper cage placed on the rubber cage so as to be relatively movable and installed on the upper structure,
The rubber bowl is integrally formed at the time of vulcanization molding by laminating a sheet-shaped rubber body with an upper surface reinforcing plate arranged on the upper surface and a plurality of internal reinforcing plates embedded inside,
A sliding rubber bearing, wherein the upper reinforcing plate has a side edge protruding in a bowl shape from the periphery of the rubber body, a concave portion is formed on the upper surface, and a sliding plate is fitted into the concave portion and bonded thereto.   2. The sliding rubber bearing according to claim 1, wherein the upper surface reinforcing plate is substantially immovable in a horizontal direction by a horizontal direction restraining means.   The sliding rubber bearing according to claim 1 or 2, wherein the sliding plate is made of a fluororesin.

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