JPH0351842B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a non-drainage type sealing device for a comb-shaped expansion joint installed in a gap between opposing ends of a deck slab, such as a road bridge.

(Prior art) Conventionally, as a water stop device for a comb-type expansion joint device installed at the ends of opposing deck slabs, a water receiving plate is provided on the web plate on the lower surface of one face plate, and a water receiving plate is provided on the lower surface of the other face plate. A structure with a drainage gutter attached to a web plate was commonly used. However, this type of water stop device can only be installed in a small size.
It quickly filled up, causing road water to flow into the top of the pier.
There were disadvantages such as roughening the shoe seat, rusting the shoe, and damaging the shoe seat due to the freezing of flowing water.

Therefore, as shown in Fig. 6, in the comb-type expansion joint device installed at the opposite ends of the deck slab, a stainless steel or steel plate receiver is installed between the lower surface free web plates b, b of the face plates a, a. Two layers of a sealing material d and a backing material e such as foam rubber are installed between the plate c and the face plates a and a (Japanese Utility Model Publication No. 56-87503).

(Problems to be solved by the invention) However, when making existing finger joints non-drainage, including these proposals, it takes a long time to fill the existing finger joints with elastic sealing material from above. Traffic regulations are required, which impedes the passage of vehicles, and if the elastic sealing material deteriorates, it is difficult to remove.

The present invention aims to solve these problems and to provide a non-drainage type sealing device for a bridge expansion joint that is easy to construct.

[Structure of the invention]

(Means for Solving the Problems) The above problems are solved by applying the constituent elements of the invention to the web plates provided on the end faces of the opposing deck slab ends in the comb-shaped expansion joints provided on the opposite ends of the floor slab. a cover rubber that is elongated in the road width direction and has a pressed portion that is pressed by the press plate and a telescopic portion that is located below the face plate; a press plate that is elongated in the road width direction that presses the cover rubber against the face plate; It consists of a cavity formed inside and an elastic support that expands and contracts in the width direction of the gap, which has a restoring force when air enters when the vacuum state contracts, and has an air circulation hole that allows air to enter and exit the cavity. The plate and elastic support are made by placing the elastic part of the cover rubber on the lower surface of the face plate and the pressed part along the web plate, applying a pressing plate to the pressed part of the cover rubber, and using this pressing plate to circulate the air in the cavity. A non-drainage type sealing device for a bridge expansion joint, characterized in that it is attached to a gap by being pressed by an expansion force that tries to return to its original state when air enters an expansion support that is extracted from a hole and is in a vacuum contracted state. This is solved by

(Example) Next, an example of the present invention will be described based on the drawings. FIG. 1 is a perspective view of the cover rubber, FIG. 2 is a perspective view of the pressing plate, FIG. 3 is a partially cutaway perspective view of the telescoping support, and FIG. 4 is a perspective view of the telescoping support when it is contracted.

The cover rubber 1 is made up of pressed parts 2, 2 that are pressed by web plates provided on the end faces of opposing floor slab ends, and an elastic part 3 located on the lower surface of the face plate, and is formed to be elongated in the road width direction. has been done. In this embodiment, the extensible portion 3 is formed in a wave shape so as to be able to adapt to the expansion and contraction of the floor slab.

The pressing plate 4 is a flat plate capable of pressing the pressed portion 2 of the cover rubber 1 against the web plate, and is elongated in the road width direction and is formed of a steel plate, a plastic plate, or the like. 5 is a bent portion formed as necessary.

The telescopic support 6 is formed in the shape of a lantern with repeated protrusions 7 and depressions 8 in the width direction of the gap between the ends of the floor slab facing the outside, and has a cavity 9 inside, and when the cavity 9 is in a vacuum state due to plastic or the like. is formed so that it contracts in the width direction of the gap, and when the vacuum state is released, air enters the cavity and an expansion force acts to return the gap widthwise to its original state. 10 is an air circulation hole that communicates the cavity with the outside, and 11 is a pin.

FIG. 5 shows an embodiment in which the present invention is applied to an ordinary comb-type expansion joint, in which 12 is a face plate, 13 is a web plate, 14 is a bracket provided as necessary to facilitate the work, 1
5 is a play room.

Specifically, first, the cover rubber 1 is positioned in the play space 15 so that the elastic part 3 is on the lower surface of the face plate and the pressed parts 2, 2 are along the opposing web plates 13, 13. Press plate 4,
Guess 4. After that, the air in the cavity 9 is sucked by a vacuum pump or the like through the air circulation hole 10, and the telescopic support 6, which is in a contracted state with the air circulation hole 10 closed by the pin 11 in a vacuum state, is placed in the play space 15. Multiple locations in the road width direction. Thereafter, the pin 11 of the air circulation hole 10 is pulled out to release the vacuum state in the cavity 9 of the telescopic support 6, and the entire support is expanded. When air enters the cavity and expands, the telescopic support 6 presses the pressing plates 4, 4,
The pressing plates 4, 4 press the pressed parts 2, 2 of the cover rubber 1, and the telescopic support 6, the pressing plates 4, 4, and the cover rubber 1 are installed in the play space, and the whole constitutes a non-drainage type sealing device. .

Note that in this embodiment, the web plates 13, 1
3 are provided with brackets 14, 14, and the press plates 4, 4 are provided with bent portions 5, 5, making the work easy.

〔Effect of the invention〕

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

Since the cover rubber consists of an extensible part and a pressed part, the extensible part allows the comb-shaped expansion joint to be made non-drainage.

The pressed portion of the cover rubber is brought into close contact with the web plate by a pressing plate, and the pressing plate can be pressed by a telescopic support, so that the inside of the play space can be kept in a sealed state as a whole.

Since the telescopic support is initially contracted in a vacuum state, it is easy to insert it into the gap, and its restoring force is used to set the cover rubber, pressure plate, and telescopic support, so it can be installed as a non-drainage device. Easy to work with.

The expandable supports are hollow and allow air to circulate, allowing them to follow the expansion and contraction of the bridge.

This device can be installed from the side of the ground cover even in existing comb-shaped expansion joints, so there is no need to restrict traffic.

Furthermore, even if the cover rubber has deteriorated, the attachment state of the cover rubber is due to the expansion force using the restoring force of the elastic support.
The cover rubber can be removed by contracting the telescopic support, making it easy to replace.

[Brief explanation of drawings]

Figure 1 is a perspective view of the cover rubber, Figure 2 is a perspective view of the pressure plate, Figure 3 is a partially cutaway perspective view of the telescopic support, and Figure 4 is when the telescopic support shown in Figure 3 is contracted. FIG. 5 is a perspective view, FIG. 5 is a sectional view showing a non-drainage type sealing device installed at the opposite ends of the deck slab, and FIG. 6 is a diagram of a conventional example. In the drawings, 1 is a cover rubber, 2 is a pressed part, 3 is an elastic part, 4 is a pressing plate, 6 is an elastic support, 9 is a cavity, and 10 is an air circulation hole.

Claims (1)

[Claims] 1. In a comb-shaped expansion joint provided at the opposite ends of the floor slab, the pressed part pressed by the press plate and the expandable part located below the face plate are connected to the web plate provided on the end face of the opposite end of the floor slab. A cover rubber that is elongated in the direction of the road width, a pressing plate that is elongated in the direction of the road width that presses the cover rubber against the face plate, a cavity formed inside, and an air circulation hole that allows air to enter and exit the cavity. It consists of an elastic support that expands and contracts in the width direction of the free space and has a restoring force when air enters when the vacuum state contracts. The pressing part is placed along the web plate, the pressing plate is applied to the pressed part of the cover rubber, and the pressing plate is used to extract the air from the cavity through the air circulation hole, allowing air from the elastic support that is in a vacuum contracted state to enter. A non-drainage type sealing device for a bridge expansion joint, characterized in that the device is attached to a gap by being pressed by an expansion force that attempts to return to the original state.