JP4052364B2 - Expansion joint for road - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a road expansion joint, and more particularly, to a road expansion joint that can be joined without welding steel members used in the expansion joint.
[0002]
[Prior art]
Conventionally, as expansion joints for roads, cell-type expansion joints that are divided and connected to the length corresponding to the road width are known in addition to the one integrally formed with the length corresponding to the road width. It has been.
By the way, the cell-type expansion joint has to be joined by welding or the like when joining steel members constituting the cell.
[0003]
[Problems to be solved by the invention]
However, when steel members are joined together by welding, deformation such as warpage and twisting of the steel material is likely to occur due to the heat of welding, and this deformation needs to be corrected to hinder the dimensional accuracy and performance of the product. There was a problem that it took time and effort.
In addition to the joining method by welding, it is conceivable to draw out a special die steel in advance and use it, but there is a problem that the cost of the steel material increases.
[0004]
An object of the present invention is to provide a road expansion joint that can be joined without causing warpage or deformation between steel members constituting a cell and can be manufactured at low cost.
[0005]
[Means for Solving the Problems]
The present invention, in order to achieve the above object, as well as sequence a plurality of cells (5) in Hashijiku direction with steel (7a) and the steel (7b) on both sides, between the cell (5) adjacent to each other A rubber-like elastic body (8) is interposed between the steel materials (7a, 7b) and bonded together, and a rubber-like elastic body (8) is bonded between the steel materials (7a, 7b). The gist is that the lower part of the member (6) is supported by a plate-shaped steel material (4) horizontally stretched over the abutment (2) provided at both ends in the bridge axis direction.
[0006]
This invention is constructed as described above, the rubber-like elastic material in the adhered with intervening on the entire surface by joining a plurality of cells between the steel constituting the cell, which the rubber-like elastic body between the steel the joint member constructed by interposing be to support the looped around a plate-like steel between abutments, it can in bonding without using any bonding means such as welding, warpage or deformation steel comrades constituting the cell It does not occur and can be manufactured at low cost.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view in the direction of the bridge axis of an expansion joint for roads embodying the present invention, FIG. 2 is an enlarged cross-sectional view of part A in FIG. 1, 1 is a bridge girder placed on an abutment 2, 3 The cell-type expansion joint body 4 is a plate-shaped steel material.
[0009]
The cell-type expansion joint body 3 is formed by joining a plurality of cells 5 each having a steel material 7a and a steel material 7b on both side surfaces via a joint member 6 so as to correspond to the bridge axis direction. As shown in FIGS. 1 and 2, the joint member 6 is configured by adhering a rubber-like elastic body 8 between the steel materials 7 a and 7 b between the cells 5 adjacent to each other over the entire surface, and these joint members. 6 is supported by the plate-shaped steel plate 4. As the bonding method, the steel materials 7a and 7b and the rubber-like elastic body 8 are bonded by vulcanization or using a room temperature curing adhesive.
[0010]
The room temperature curable adhesive may be 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-based adhesive Agents.
The type of adhesive to be used may be appropriately determined according to the type of elastomer and hard plate to be used, the required adhesive strength, and the like, and is preferably set to an adhesive strength that causes rubber destruction. Moreover, these may be used independently or 2 or more types may be used together.
[0011]
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.
Examples of the phenolic adhesive include vinyl phenolic type, epoxy phenolic type, and nitrile phenolic type, and are used in combination with other adhesives.
[0012]
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, when the rubber-like elastic body 8 is interposed between the steel materials 7a and 7b and bonded using the room temperature curing adhesive, the bonding surfaces of the steel materials 7a and 7b and the rubber-like elastic body 8 are bonded. The surface is subjected to chlorination treatment or oxidation treatment, and this adhesive surface is made of a group consisting of phenolic adhesive, urethane adhesive, modified silicone adhesive, rubber adhesive, cyanoacrylate adhesive, and epoxy adhesive. The rubber-like elastic body 8 can be firmly bonded between the steel materials 7a and 7b by being integrally fixed via at least one selected room temperature curable adhesive.
[0018]
In the present invention, a plurality of cells are joined with a rubber-like elastic body interposed between the steel members constituting the cells as described above, and the rubber-like elastic bodies are interposed between the steel materials. Since the joint member to be constructed is supported by the plate-like steel material spanned between the abutments, the steel members constituting the cell can be joined without causing warpage or deformation, and can be manufactured at low cost. is there.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in the direction of a bridge axis of a road expansion joint embodying the present invention.
FIG. 2 is an enlarged cross-sectional view of a portion A in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bridge girder 2 Abutment 3 Cell-type expansion joint main body 4 Plate-shaped steel material 5 Cell 6 Joint member 7a, 7b Steel material 8 Rubber-like elastic body

Claims (5)

A plurality of cells on both sides with a steel (7a) and the steel (7b) to (5) as well as arranged in Hashijiku direction, together steel between adjacent cells (5) (7a, 7b) rubber between The elastic body (8) is bonded over the entire surface, and the lower part of the joint member (6) configured by interposing and bonding the rubber-like elastic body (8) between the steel materials (7a, 7b) is connected to the bridge axis direction. The expansion joint for roads supported by the plate-shaped steel material (4) horizontally spanned on the abutment (2) provided in both ends of the. The expansion joint for roads according to claim 1, wherein the steel materials (7a, 7b) and the rubber-like elastic body (8) are vulcanized and bonded. The expansion joint for roads of Claim 1 which bonded the said steel materials (7a, 7b) and the rubber-like elastic body (8) via the normal temperature curing adhesive. 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 expansion joint for roads according to claim 3 . The expansion joint for roads of Claim 3 or 4 which performed the chlorination process or the oxidation process to the adhesion surface of the said steel materials (7a, 7b) and the adhesion surface of the said rubber-like elastic body (8).

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