JPS585682Y2 - expansion joint device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to expansion joint devices for bridges, elevated roads, etc.

Butt-type rubber joints are often used in small expansion joints with an expansion/contraction amount of about 50 rran or less, but dirt often accumulates in the seal rubber part and the rubber often falls off as it becomes loaded every time the car runs.

In addition, especially in cold regions, expansion joints may be damaged by tire chains, snowplow blades, etc., metal fittings may corrode due to the spraying of snow removal chemicals, and rubber may fall off.

The present invention is an expansion joint installed in a pavement layer, especially a small expansion joint, by making the rubber mounting bracket rigid, supporting the wheel load to some extent with the protrusions, and supporting the plate-shaped anchor bar on the paved resin composition. This is intended to compensate for the above drawbacks.

More specifically, the configuration of the metal fittings is such that it has a vertical section in cross section located at the end face of the play area, a protrusion for supporting the wheel load on the upper side, and a flat plate-shaped receiving piece on the lower side. Attach plate-shaped anchor bars bent in a substantially S-shape in the direction at intervals, and anchor the anchor bars to opposing resin composition layers such as resin mortar or resin concrete with a space in between, As opposed metal fittings,
The present invention provides an expansion joint device in which seal rubber is bonded between the metal fittings.

Next, embodiments of the present invention will be described based on the drawings.

1 is a metal fitting, 2 is an anchor bar, the metal fitting 1 has a vertical portion 3 located on the end face of the free space 7, a wheel load supporting projection 4 on the upper side,
The anchor bar 2 is made into a plate shape and bent into an S-shape, and the anchor bar 2 and the metal fitting 1 are connected to each other, with the anchor bar 2 touching the free end surface of the vertical portion 3 of the metal fitting 1. It is fixed perpendicularly to the surface.

The metal fitting 1 thus constructed is fixed by anchoring the anchor bar 2 to the resin composition layer 8, such as resin mortar or resin concrete, which is paved on the floor slab 9 which faces the opposing floor slab 9 with the opposing play space 7 in between.

A seal rubber 6 is installed between a pair of opposing metal fittings.

Overall, an expansion joint is thus formed.

The standard construction order for this expansion joint is approximately as follows.

First, the button is brought to the factory, and a predetermined sealing rubber 6 is attached to the metal fitting 1 by adhesive.

If necessary, apply paint or the like to the receiving piece 5 of the metal fitting 1.

A piece of veneer with a thickness of 3rrrIrL is cut in advance to the width of the gap 1.

When the button is on-site, the metal fitting 1 is stretched to the specified width (
Set it to D) in Figure 4 and press the button.

After cutting the paving material on the opposite end of the slab, set the main body temporarily according to the size and mark the location where the expansion type anchor will be driven.

Remove the main body and drill the bolt holes with a hammer drill.

Drive in the anchor bolt.

As shown in FIG. 5, a plywood board 11 is attached to a metal fitting using double-sided tape, and a setting angle 12 is fixed thereon with a binding wire.

Set the main unit. Anchor reinforcement 13 and anchor bar 2 are welded.

The setting angle 12 is removed and the transverse reinforcing bar 14 is attached by welding.

A brimer is applied, and a resin composition 8 of resin mortar or resin concrete is poured.

After hardening, the temporarily welded reinforcing bars 15 are removed and finished with a sander.

Since the present invention is constructed as described above, it has the following advantages.

That is, since the shape of the metal fitting has a protrusion for supporting the wheel load, the seal rubber is protected from the wheel load, and together with the receiving piece, the seal rubber is less likely to fall off or lift up.

There is also less damage caused by tire chains, snowplow blades, etc.

Since the seal rubber can be mechanically fixed by using this metal fitting, it is highly effective against damage and falling off of the seal rubber, and water can be stopped for a long time.

In particular, in this invention, a plate-shaped anchor bar bent in an almost S-shape is anchored to the resin composition layer, so in other words, high-strength resin mortar or resin concrete can be used to fix the anchor bar, so the pavement layer An expansion joint device can be easily formed within.

Further, since the anchor bar is a plate-like body having a substantially S-shape, it is firmly held in the resin composition layer.

Due to their high strength, resin mortar and resin concrete can be made thinner, and the required strength can be achieved within a few hours after construction, making them particularly suitable for repairs.They also maintain strong adhesion, making them ideal for use with floor slabs and paving materials. Achieves unity.

Here, the resin composition refers to thermosetting resins such as epoxy, unsaturated polyester, and urethane.

[Brief explanation of drawings]

Fig. 1 is a sectional view schematically showing an embodiment of the present invention;
The figures are a view of the anchor bar and metal fittings seen in the A-A direction in Figure 1, Figure 3 is a view of the anchor bar and metal fittings seen in the B-B direction in Figure 2, Figures 4, 5, and 6. The figure is an example diagram showing the construction process. In the drawing, 1 is a metal fitting, 2 is an anchor bar, 3 is a vertical portion, 4 is a projection for supporting a wheel load, 5 is a receiving piece, 6 is a seal rubber, I is a gap, and 8 is a composition.

Claims (1)

[Scope of utility model registration request] A plate-shaped anchor bent in an approximately S-shape in the width direction of the floor plate, the vertical part of the metal fitting having a cross-sectional vertical part located at the end face of the play area, a protrusion for supporting the upper wheel load, and a flat plate-shaped receiving piece below. An expansion joint device characterized in that bars are attached at intervals, the anchor bars are anchored to paved resin compositions facing each other with gaps in between, and seal rubber is bonded between the opposing metal fittings.