JP3407090B2 - Expansion joint sealing material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material for expansion joints interposed between two adjacent bridges.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, two bridges 1
When connecting 0 and 10, a gap 20 is provided between the end faces 11 and 11 so that the end faces 11 and 11 do not abut each other at high temperatures in summer, and further, the end faces 11 and 11 are respectively provided on the upper surfaces of the end portions. The finger joints 12, 12 that are formed in the shape of an eaves so as to project toward the other side of each other and receive the water leaking from the gap 25 between the two finger joints 12, 12 and drain the water. A gutter 50 is attached to the end face of the. In addition, 55 is an auxiliary eaves connected to the end face on the side where the gutter 50 is not attached.

Instead of separately providing a gutter, as shown in FIG. 2, a backup material 60 is inserted into the gap 20 between the bridges 10 and 10 from above, and a sealing material 70 is filled on the backup material 60. It is used.

However, among the above-mentioned conventional expansion joints, the one provided with the gutter 50 shown in FIG. 1 has a problem that sand enters the gutter 50, accumulates, loses drainage function, and leaks water. . The sealing material 70 shown in FIG. 2 has a problem that it is necessary to stop the passage of the sealing material during its construction, which causes traffic congestion.

[0005]

The problem to be solved is that the conventional expansion joint loses its drainage function and leaks water, or causes traffic congestion during construction.

[0006]

A means for solving the problems will be described with reference to FIGS. INDUSTRIAL APPLICABILITY The present invention prevents water leakage from the gaps between the eaves-shaped finger joints 12 and 12 projecting toward the other side of the end faces 11 and 11 on the upper surfaces of the respective end portions of the bridges 10 and 10 that are connected by opening the gap 20. For the end face 1
1, 11 and the finger joints 12, 12, which are sealing materials for expansion joints, and which have leaf springs 3 on the bottom of a solid rubber portion 31 having an open U-shaped cross section.
2, the sponge rubber portion 33 thicker than the solid rubber portion 31 is filled, and the exposed surface of the sponge rubber portion 33 is covered with the solid rubber film 34.
It is formed by adhering to the end faces 11, 11 via 0.
Further, the adhesive 40 may be an adhesive such as butyl tape.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS.
2 and 12 are on the upper surfaces of the ends of the bridges 10 and 10,
The eaves-shaped finger joints projecting toward the other side of the end faces 11, 11 are stoppers projecting on both end faces 11, 11 and are attached by welding 16. In addition, 25 is a finger joint 12,1
It is a gap between the two. Reference numeral 30 is a sealing material of the present invention which is inserted and attached between the end faces 11 and 11 and the finger joints 12 and 12, and is configured as follows.

Reference numeral 31 is a solid rubber portion having a U-shaped cross-section with an open upper portion, and its width is made larger than the gap 20. A leaf spring 32 is buried in the bottom of the solid rubber portion 31 and is made of spring steel. Reference numeral 33 denotes a sponge rubber portion filled in the sponge rubber portion 31, which is thicker in the up-down direction than the solid rubber portion 31 and has an exposed portion cut off from the upper solid rubber portion 31. 34
Is a solid rubber film that covers the exposed surface of the sponge rubber portion 33, and 40 is an adhesive that adheres the side surface of the sealing material 30 to the end surfaces 11 and 11, and may be an adhesive such as butyl tape.

As shown in FIG. 4, it is possible to embed a plate-shaped core portion 35 made of sponge rubber or resin having a hardness higher than that of the sponge rubber portion 33 in the sponge rubber portion 33. . Further, the leaf spring 32 may be buried in the bottom of the solid rubber portion 31 or integrally attached to the outside, or may have a substantially convex shape toward the upper side, and further, the sponge rubber portion 33 and the solid rubber film 34. It is also possible to manufacture the solid rubber part 31 separately from the solid rubber part 31, or to integrally mold the solid rubber part 31.

Construction is performed as follows. That is, first,
Remove the existing gutter 50 and auxiliary eaves 55. Next, both end faces 11,
The stoppers 15 and 15 are attached to 11 by welding 16 or the like. Thirdly, the adhesive 40 is applied to the side surface of the sealing material 30 and the insertion portions of the end surfaces 11 and 11 into which the sealing material 30 is inserted. Finally, the sealing material 30 is inserted and attached. All the above work is performed from below the bridges 10, 10.

[0011]

The operation will be described. With the seal member 30 inserted, the seal member 30 is compressed from both side surfaces, and in particular, the spring plate 32,
Since the central portion of the core portion 35 is pushed up and deforms upward, the upper surface of the sealing material 30 completely closes the gap 25 and completely prevents the entry of water, sand, and other foreign matter from the gap 25. To do.

[0012]

Since the present invention is constructed as described above,
The construction can be performed from below the bridges 10 and 10, it is not necessary to stop the passage of vehicles, and furthermore, the entry of water, sand and other foreign matter through the gap 25 can be completely prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing a conventional example.

FIG. 2 is a perspective view showing another conventional example.

FIG. 3 is a sectional view showing an embodiment of the present invention.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing attachment to a bridge according to an embodiment of the present invention.

[Explanation of symbols]

10 bridges 11 end face 12 finger joint 15 stopper 16 welding 20,25 gap 30 sealing material 31 Solid rubber part 32 leaf spring 33 Sponge rubber part 34 Solid rubber film 35 core 40 Adhesive, adhesive 50 gutter 55 Auxiliary eaves 60 backup material 70 Sealant

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Claims (2)

(57) [Claims] 1. A bridge (1) for connecting by opening a gap (20).
(0,10) on the upper surface of each end, the end surface (11,11)
Inserted between the end faces (11, 11) and the finger joints (12, 12) in order to prevent water leakage from the gap (25) of the eaves-shaped finger joints (12, 12) projecting to the other side. In the sealing material of the expansion joint, the leaf spring (32) is buried in the bottom of the solid rubber portion (31) having an open U-shaped cross section, and the sponge rubber portion (thicker than the solid rubber portion (31) ( 33), a sponge rubber portion (33) whose exposed surface is covered with a solid rubber film (34), and which is adhered to the end faces (11, 11) via an adhesive (40), which is a seal for an expansion joint. Material. 2. A seal for an expansion joint according to claim 1, wherein the leaf spring (32) is formed in a substantially convex shape above a solid rubber portion (31) having an open U-shaped cross section. Material