JP4075970B2 - Rubber bearing body slip prevention structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for preventing the sliding of a rubber bearing, and more specifically, the rubber bearing mounted on the structure is effectively prevented from shifting with the movement of the structure in the bridge axis direction. The present invention relates to a structure for preventing sliding of a rubber bearing.
[0002]
[Prior art]
Conventionally, as a structure of a sliding support between an upper structure such as a concrete bridge girder and a lower structure such as a pier or an abutment, for example, as shown in FIGS. 2 and 3, a saddle mortar 2 is provided on the lower structure 1. A rubber bearing body 5 formed by laminating a steel plate 3 and a rubber sheet 4 is placed on the rubber bearing body 5, and a lower sliding member 7 made of a Teflon plate is interposed on the upper surface of the rubber bearing body 5 via an iron plate 6. It was glued and fixed. On the other hand, an upper sliding member 9 made of a stainless steel plate that slides on the sliding member 7 made of the Teflon plate is fixed to the lower surface of the upper structure 8.
[0003]
The sliding support as described above is to slide the shear deformation of the superstructure 8 in the bridge axis direction (arrow X in the figure) or in the direction perpendicular to the bridge axis on the upper surface of the rubber support body 5.
[0004]
[Problems to be solved by the invention]
By the way, the rubber support 5 as described above has a structure that is simply placed on the lower structure 1 via the saddle mortar 2, so that the upper structure 8 is in the direction of the bridge axis (the arrow in the figure). X) or when moved in the direction perpendicular to the bridge axis, the rubber bearing body 5 may also follow and shift, and therefore, the anti-sliding means 10 is provided.
[0005]
As shown in FIG. 2, as a conventional example, the anti-sliding means 10 is formed by drilling a saddle mortar 2 on the upper surface of the lower structure 1 and then machining a hole 11 to a required depth at the installation position of the rubber support 5. Thereafter, a rod-shaped anti-sliding member 12 is inserted into the hole 11, and the filling material 13 such as mortar is filled and fixed in a state where the position and height of the anti-sliding member 12 are maintained. A fitting recess 14 formed in advance on the bottom surface of the rubber bearing 5 is fitted and fixed to the protruding portion 12a of the anti-sliding member 12 protruding from the upper surface.
[0006]
However, the operation of positioning and providing the anti-sliding member 12 at the installation position of the rubber support 5 requires a lot of labor and time, and is a very difficult operation.
As another conventional example, as shown in FIG. 3, after placing a saddle mortar 2 on the upper surface of the lower structure 1, the saddle mortar 2 and the lower structure in the vicinity of the installation position of the rubber support 5 are provided. 1, a block-like anti-sliding member 15 is assembled and fixed via a fixing nail 16.
[0007]
However, even in this conventional example, there is a problem that the saddle mortar 2 is damaged when the fixed nail 16 of the block-shaped anti-sliding member 15 is driven, and there is a problem that much time and effort are required.
The object of the present invention is to effectively prevent the rubber bearings placed on the structure from moving with a movement in the direction of the bridge axis or the direction perpendicular to the bridge axis by simple construction. An object of the present invention is to provide a structure for preventing sliding of a rubber bearing body.
[0008]
[Means for Solving the Problems]
To achieve the above Symbol purpose, sliding prevention structure of the rubber bearings of the present invention, placing a rubber bearing body formed by laminating the steel plates and the rubber sheet shoe seat mortar upper surface of the lower structure, an upper A structure for preventing sliding of a rubber bearing body, wherein a structure is placed on the rubber bearing body through an upper sliding member secured to the lower surface of the upper structure and a lower sliding member secured to the upper surface of the rubber bearing body. The gist of the present invention is that the lower surface of the rubber support and the upper surface of the saddle mortar are integrally fixed via a room temperature curing adhesive. Here, any one of buff treatment, chlorination treatment, and oxidation treatment can be performed on the adhesive surface of the rubber support that adheres to the upper surface of the mortar with the room temperature curable adhesive. . The room temperature curable adhesive may be at least one selected from the group consisting of phenolic adhesives, urethane adhesives, modified silicone adhesives, rubber adhesives, cyanoacrylate adhesives, and epoxy adhesives. It can also be.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In addition, the same component as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description.
FIG. 1 is a cross-sectional view showing a mounting state of a rubber bearing body 20 according to a first embodiment of the present invention. The rubber bearing body 20 is integrally formed by laminating a steel plate 3 and a rubber sheet 4. ing.
[0010]
The lower surface 20 a of the rubber bearing 20 and the upper surface 2 a of the saddle mortar 2 are integrally fixed via a room temperature curing adhesive 21. This construction work is performed on the lower surface 20a of the rubber support 20 by any one of buffing, chlorination (for example, trichloroisocyanuric acid solution), and oxidation.
The room temperature curable adhesive 21 may be either a one-component type or a two-component type, but a phenol-based adhesive, a urethane-based adhesive, a modified silicone-based adhesive, a rubber-based adhesive, a cyanoacrylate-based adhesive, an epoxy System adhesives.
[0011]
The type of adhesive to be used may be appropriately determined according to the type of elastomer and hard plate used, the required adhesive strength, etc. It is preferable to use force. Moreover, these may be used independently or 2 or more types may be used together. In particular, a high adhesive force can be obtained by using an adhesive having good wettability with the elastomer on the elastomer side and firmly bonding the adhesives of the two layers.
[0012]
Examples of the phenolic adhesive include vinyl phenolic type, epoxy phenolic type, and nitrile phenolic type, and are used in combination with other adhesives.
Urethane adhesives are based on prepolymers based on polyisocyanates and polyethers or polyester polyols, and contain fillers such as calcium carbonate and carbon black and additives such as tertiary amines and tin catalysts. Use it. In addition, epoxy-modified, rubber-modified products, those having a hydroxyl group added to the terminal or inside of the rubber, phenol resins, and the like are also suitably used for improving adhesion.
[0013]
In addition, when a oxazolidine compound, a ketimine compound, an aldimine compound, an enamine compound or the like is used in combination as a latent curing agent, the curability becomes better.
The modified silicone-based adhesive is a polymer obtained by alkoxysilylating the end of a polyol. In general, an MS polymer manufactured by Kaneka Chemical Industry is suitably used. In the same manner as described above, it is preferable to use a compound in which additives such as a filler and a catalyst are blended, and a modified polyol.
[0014]
Rubber adhesives include chlorinated natural rubber, chloroprene, polybutadiene and other low temperature curing agents such as tetramethylthiuram disulfide (TT) and tetramethylthiuram monosulfide (TS), phenolic resin, resole resin, and as required. Accordingly, a solution type to which isocyanate or the like is added may be used. Moreover, it is preferable to add carbon black, titanium, calcium carbonate or the like as a filler.
[0015]
The cyanoacrylate-based adhesive is a so-called instant adhesive, and it may be a 2-cyanoacrylate commercially available from Toa Synthetic Chemical Co., Ltd. or a derivative thereof. It is preferable to use together with others.
Epoxy adhesives consist of epoxy resins such as glycidyl ether type, glycidyl ester type, glycidyl amine type, and alicyclic type, curing agents such as polyamidoamine, polythiol, acid anhydride, catalyst, filler, etc. Use it.
[0016]
As the epoxy resin, a phenol novolak type or an orthocresol novolak type modified or rubber-modified, and an amine curing agent modified by rubber are used as necessary. In addition, when a oxazolidine compound, a ketimine compound, an aldimine compound, an enamine compound or the like is used in combination as a latent curing agent, the curability becomes better.
[0017]
These adhesives may be used alone or in combination depending on the type of elastomer that is the adherend.
As described above, the adhesive surface of the rubber support 20 is subjected to chlorination treatment or oxidation treatment, and this adhesive surface is subjected to phenol adhesive, urethane adhesive, modified silicone adhesive, rubber adhesive, cyanoacrylate adhesive. The rubber bearing body 20 is fixed to the structure 8 in a bridge axis direction or a direction perpendicular to the bridge axis by integrally fixing via at least one room temperature curing type adhesive selected from the group consisting of an adhesive and an epoxy adhesive. In addition to being able to effectively prevent displacement and movement with the movement, the construction can also be performed easily.
[0018]
In the present invention, as described above, the lower surface of the rubber support and the upper surface of the saddle mortar are integrally fixed via the room temperature curable adhesive, so that the rubber support placed on the lower structure is It can be effectively prevented from moving shift with the movement of the bridge axis or Hashijiku perpendicular direction of the upper structure by a simple construction, also processing operations like for positioning and fixing the sliding prevention member as in the prior art Can be omitted, so that the workability for installing the anti-sliding member can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mounting state of a rubber bearing body according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a conventional example of a sliding prevention member.
FIG. 3 is a cross-sectional view showing another conventional example of a sliding prevention member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower structure 2a Upper surface 2 Cancer mortar 3 Steel plate 4 Rubber sheet 7 Lower sliding member 8 Upper structure 9 Upper sliding member 10 Anti-sliding means 11 Hole 12 Anti-sliding member 20 Rubber bearing body 20a Lower surface part 21 Anti-sliding member

Claims (3)

An upper sliding member in which a rubber bearing body constituted by laminating a steel plate and a rubber sheet is placed on a saddle mortar on the upper surface of the lower structure, and the upper structure is fixed to the lower surface of the upper structure, and the rubber bearing. In the structure for preventing sliding of the rubber bearing body, which is mounted on the rubber bearing body via a lower sliding member fixed to the upper surface of the body, the lower surface of the rubber bearing body and the upper surface of the saddle mortar are bonded at room temperature. A structure for preventing sliding of a rubber bearing body, which is integrally fixed through an agent. Against the adhesive surface of the rubber bearing element to adhere to the upper surface of the shoe seat mortar by the room temperature curing type adhesive, buffing, chlorination process of claim 1 for any one of the processing method of the oxidation treatment Structure to prevent sliding of rubber bearings. The room temperature curable adhesive is at least one selected from the group consisting of a phenol adhesive, a urethane adhesive, a modified silicone adhesive, a rubber adhesive, a cyanoacrylate adhesive, and an epoxy adhesive. The structure for preventing sliding of the rubber bearing body according to claim 1 or 2 .

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