JPH0330405Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an expansion joint device, and more specifically, to an expansion joint device for structures such as road bridges.

[Prior art and its problems]

Conventionally, expansion joint devices have been widely used in road bridges as means for absorbing displacement of girder ends caused by temperature changes in the bridge, creep and drying shrinkage of concrete, repeated loads, and the like.

By the way, in this type of expansion joint device, the fixing fittings are fixed to the edges of the floorboards facing each other with a gap between them, and the fixing fittings are fixed to the edges of the floorboards facing each other through the gaps, and the fixing fittings are expanded inward from the openings on the opposing surfaces of the fixing fittings. A reverse wedge-shaped concave groove is provided, and a bulge-shaped fitting portion is formed on both sides of a flexible elastic joint member made of rubber or the like so as to be inscribed with the groove, and these bulge-shaped fitting parts are formed. The structure is constructed by fitting the parts into the grooves of each fixing metal fitting, but since the fixing metal fittings are fixed to the floorboard by anchor means, it takes a huge amount of time and money to carry out rework work such as chiseling. In addition to this, there is a problem in that the connecting portion between the fixing fitting and the flexible expansion joint member is easily damaged due to peeling.

[Means for solving problems]

Therefore, in this invention, in order to solve the above-mentioned problems, each fixing metal fitting is fixed to the floorboard through resin concrete, and at the same time, a gap is provided in the bulge-shaped fitting part formed in the flexible expansion joint member. By filling the gap of the lever with a shape-retaining material and further attaching and holding the contact surface between the flexible expansion joint member and the fixing metal via an adhesive, it is possible to facilitate rework and create a flexible expansion joint. This is intended to strengthen the connecting portion between the member and the fixture.

In this case, it is preferable to use resin concrete using a binder containing liquid rubber, as this can improve elasticity, adhesion, and facilitate construction.

[Effect]

In the expansion joint device according to this invention, the fixing fitting is fixed and held on the floorboard by the adhesive force of the resin concrete, and the flexible expansion joint member and the fixing fitting have a shape-retained bulge-shaped fitting part and an inverted wedge-shaped part. It is firmly held by engagement with the groove and adhesion of the contact surface between the flexible expansion joint member and the fixing fitting.

〔Example〕

Next, preferred embodiments of the expansion joint device according to the present invention will be described in detail below with reference to the accompanying drawings.

In the accompanying drawings, the expansion joint device according to the present invention has floorboards 10 and 1 facing each other with a predetermined clearance a therebetween.
An elastomer-based mortar layer 14 is provided on 2,
A fixing fitting 16 is attached to a predetermined position of this mortar layer 14.
a, 16b are arranged facing each other, and these fixing fittings 16a, 16b are fixed to the floorboards 10, 12 via resin concrete 18, and the fixing fittings 16a,
16b are provided with grooves 20a and 20b in the form of a reverse wedge that expands inward from the opening thereof, and grooves 20 and 20b are provided on both side edges of a flexible elastic joint member 22 made of rubber or the like. It is constructed by providing bulging fitting parts 24a, 24b formed so as to be inscribed therein, and fitting these bulging fitting parts 24a, 24b into the grooves 20a, 20b of the fixing fittings 16a, 16b. ing.

That is, the fixing fittings 16a and 16b are arranged facing each other on the mortar layer 14 at a position that is slightly offset inward from the opposing surface of each floorboard, and in such a way that their upper surfaces are located substantially on the same plane as the pavement surface B. For example, resin concrete (trade name: Elastomerits, Kawada Kogyo) uses a binder containing a predetermined amount of liquid rubber in addition to epoxy resin to improve elasticity, bending fatigue resistance, adhesion, and continuous hardening.
Co., Ltd.) and fixed and held on the floorboards 10 and 12. In this case, it is preferable that anchor means 25 formed by assembling reinforcing bars be attached to the back surface of each of the fixing fittings 16a, 16b and integrated with the resin concrete 18.

On the other hand, gaps 26 and 26 are formed in the bulging fitting parts 24a and 24b of the flexible expansion joint member 22, respectively, and these gaps 26 and 26 are filled with a shape-retaining material 28 such as mortar. and each reverse wedge-shaped groove 2
0a, 20b, and the joint member 22 and each fixing metal fitting 16a, 1
The contact surface C with 6b is bonded with adhesive 30.

Further, lubricating oil or the like is applied to the contact surface d between the joint member 22 and the mortar layer 14, and furthermore, the fixing fittings 16a, 16a' and 16b, 16 adjacent to each other are
A waterproof rubber 32 is inserted in the connecting portion b' to prevent rainwater from entering.

According to the expansion joint device according to the present invention configured as described above, the displacement at the end of the floor plate is reduced by the mortar layer 14, the resin concrete 18, and the fixing metal fittings 16.
The joint member 22 and the fixing fitting 16 are fitted into the inverted wedge-shaped recessed groove 20, and are absorbed by the deformation of the joint member 22. Since it is firmly held by the held bulging fitting portion 24 and the adhesive 30, it is possible to prevent peeling during deformation, and therefore to prevent problems such as damage. If the joint member 22 is damaged due to long-term use, remove the damaged joint member 22 and insert a new joint member into the reverse wedge-shaped grooves 20a, 20b while deforming the bulging fitting parts 24a, 24b. After that, the gap 26 is filled with the shape retaining material 28, and the contact surface between the joint member and the fixing fittings is bonded with adhesive.
Furthermore, when repairing or replacing the fixture 16, only the resin concrete 18 needs to be removed and rework performed.

[Effect of idea]

As mentioned above, according to the expansion joint device according to the present invention, it is possible to improve the strength of the connecting portion between the flexible expansion joint member and the fixing fitting, so that inconveniences such as damage can be prevented as much as possible. In addition, it has various advantages such as being able to simplify rework work since there is no need to chisel the floorboards, etc., and its practical effects are extremely large.

Although the preferred embodiment of the expansion joint device according to the present invention has been described above, the present invention is not limited to this embodiment. Of course, various modifications such as chipping can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing a preferred embodiment of the expansion joint device according to the present invention, and FIG. 2 is an explanatory cross-sectional view taken along the line -- in FIG. 1. 10, 12... Floor board, 14... Mortar layer, 1
6...Fixing metal fittings, 18...Resin concrete, 2
0... Reverse wedge-shaped groove, 22... Joint member, 24...
Bulging fitting portion, 26...Gap, 28...Shape retaining material, 30...Adhesive, 32...Water stop rubber.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Fixing fittings are installed on the edges of the floorboards facing each other with a predetermined gap in between, and a reverse wedge-like shape is provided on the opposing surface of each fixing fitting that expands from the opening toward the inside. A concave groove is provided, and protruding fitting portions are formed on both side edges of the flexible expansion joint member to be inscribed with the concave groove, and these protruding fitting portions are inserted into the concave grooves of each fixing fitting. In an expansion joint device formed by fitting,
Each fixing fitting is fixed to the floorboard via resin concrete, a gap is provided in the bulge-shaped fitting part formed in the flexible expansion joint member, this gap is filled with a shape-retaining material, and the flexible expansion and contraction An expansion joint device characterized in that a contact surface between a joint member and a fixture is attached and held via an adhesive. (2) The expansion joint device according to claim 1, wherein the resin concrete is a resin concrete using a binding material containing liquid rubber.