JPS5938488Y2 - expansion joint device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an expansion joint device used to connect gaps between pieces of highways, bridges, airport runways, etc.

Proper construction of highways, bridges, runways, etc. requires that gaps be left between the pieces of the road to compensate for expansion and contraction due to fluctuations in ambient temperature.

Therefore, some means must be fitted into the gaps that expand and contract with the movement of the road or other piece, and form smooth longitudinal grains between adjacent pieces.

An expansion joint device is fitted into this gap.

An example of such an expansion joint device is shown in FIG.

In this expansion joint device, the joint body a made of an elastic body is
Shrinkage absorbing grooves are formed in the width direction, and these shrinkage absorbing grooves tend to cause the joint body a to lack rigidity, and with long-term use, the joint body a swells as shown by the dotted line. , the function of the expansion joint was incomplete.

In addition, there is a joint body in which a large number of shrinkage absorption holes are provided (for example, Japanese Patent Publication No. 46-4431), but the periphery of the shrinkage absorption holes swells during compression.

The present invention was developed in view of the above-mentioned business circumstances, and its purpose is to prevent the swelling of the peripheral edge of the shrinkage allowance absorption hole during compression of the joint body, and ultimately to prevent the swelling of the joint body. The purpose is to ensure that it fully functions as an expansion joint.

Hereinafter, the present invention will be explained with reference to FIG. 2 and subsequent figures.

In the drawing, reference numerals 1 and 1' are base plates, and a base plate l is attached to the outer end of these base plates 1 and 1'.
, 1' are erected at right angles to the partition members 2, 2'.

4 in the drawing is an expandable joint body, and this joint body 4
are made of an elastic body such as rubber, and fitting portions 5, 5' on both end faces of the joint body 4 are fitted with the partition members 2, 2'.
is a pretense.

These fitting portions 5, 5' have grooves 3°3' into which the upper ends of the partition members 2, 2' are inserted, and these grooves 3, 3'
For this reason, tongue pieces 17 for preventing curling are provided at both ends of the joint body 4.
．． 17' is formal.

Shallow relief grooves 6, 6' are formed on the upper and lower surfaces of the joint body 4 so as to face each other at the top and bottom. The plural form is used at regular intervals along the length of the word.

＼Also, there are relief grooves 6, 6″ in the joint body 4.
A plurality of shrinkage absorption holes 7 are formed at the positions of , and a water stop portion 8 made of a water stop film is formed in these shrinkage table absorption holes 7 close to the upper opening 7a.

The water stop portion 8 is formed integrally with the bottom of the joint body 4.

Recesses 9 are formed at regular intervals in the width direction of the upper surface of the joint body 4, and holes 10 are bored in the bottoms of these recesses 9.

Collars 11 are fitted into these holes 10.

Also, on the lower surface of the joint body 4, there is a lip 1 extending over the entire length in the middle direction.
2 are formed to sandwich the hole 10.

The joint body 4 thus formed is currently cut to length and mounted on the base plate 1, 1' of the adjacent section 13, 13' of the road or bridge.

That is, the diaphragm member 2 is attached to the fitting portions 5, 5' of the joint body 4.
, 2'', insert the mounting bolt 14 planted in the base plates 1, 1' into the collar 11, and then tighten the mounting bolt 1.
4, the joint body 4 is fastened to the base plate 1.1' via the washer 16.

With this tightening, the lip 12 is attached to the base plate 1, 1'.
It is crimped to provide waterproof function.

Furthermore, a camp 17 made of rubber is fitted into the four parts 9.

Asphalt is laid on the upper side of the adjacent member 13, 13' at the same height as the surface of the joint body 4, but resin and mortar 1 are laid at the joint between the asphalt and the partition plate members 2, 2'.
8 is filled.

Roads, bridges, etc. expand and contract repeatedly due to changes in ambient temperature.

Now, when expanding, the space between the adjacent members 13 and 13' contracts, and in this case, the joint body 4 is compressed.

Further, during contraction, the adjacent pieces 13, 13' are separated, but the joint body 4 is expanded.

Note that the shrinkage of the joint main body 4 during compression is absorbed by the shrinkage absorption holes 7, so that the joint main body 4 does not rise.

That is, the joint body 4 has a shrinkage absorption hole 7 formed therein, and is not a groove extending in the general width direction to absorb the shrinkage, so the rigidity of the joint body 4 itself is not impaired. The joint body 4 does not swell upward.

In addition, the joint body 4 is made only of an elastic material such as rubber, and there is no metal core material buried inside, so it can be easily cut on site and the width matching work is easy. It is something.

Further, the upper end portions of the partition members 2, 2' are inserted into the recesses 3, 3' of the fitting portion 5.5', and the tongue pieces 17.
17' is in contact with the outer surface of the partition plate members 2, 2'.

Therefore, when a force is applied by an automobile wheel or the like in the direction shown by the arrow in FIG. 2, the end portion 4a of the joint body 4 does not curl up, and the amount of deformation against the load is small.

For this purpose, the end portion 4a of the joint body 4 is made of resin and mortar 18.
It will not peel off from the joint with the seam, and sand will not enter the joint.

The present invention has been described in detail above, and the adjacent members 13°13
A joint main body 4 made of an elastic body is fastened to base plates 1, 1 fixedly fixed to the base plates 1, 1, a plurality of shrinkage absorption holes 7 are formed in the joint main body 4, and holes are formed in the width direction on the upper and lower surfaces of the joint main body 4. A plurality of relief structures 6, 6' extending over the entire length are formed at regular intervals in the longitudinal direction of the joint body 4, and relief grooves 6, 6' are formed.
The shrinkage absorption holes 7 arranged in the width direction of the joint body 4 are connected at the upper and lower parts, and a water stop portion 8 made of a water stop film is formed inside the shrinkage absorption holes 7 close to the upper opening 7a. This expansion joint device is characterized in that the water stop portion 8 is formed concavely upward.

Therefore, when a compressive force is applied to the joint body 4, the shrinkage absorption hole 7 deforms into a substantially elliptical shape with its long axis perpendicular to the direction of action of the compressive force, and the long axis of the shrinkage absorption hole 7 Although the side peripheral edge portion bulges, since the shrinkage absorption holes 7 are connected by the relief groove 6 as described above, the compressive deformation of the peripheral edge portion is absorbed by the relief groove 6, and the bulge of the peripheral edge portion disappears.

In addition, since the water stop part 8 has an upwardly concave shape, the water stop part 8 moves the peripheral edge of the short axis side of the shrinkage allowance absorption hole 7 compressed and deformed during compression to the center side of the shrinkage allowance absorption hole 7. It has a downward pulling action and prevents the peripheral edge of the short axis side of the shrinkage absorption hole 7 from swelling.

In addition, there is no bulge in the joint body 4, and the joint body 4 can fully function as an expansion joint.

[Brief explanation of drawings]

Figure 1 is a partially omitted vertical cross-sectional view of a conventional expansion joint device.
Fig. 2 is a longitudinal sectional view of the present invention - an embodiment, Fig. 3 is a longitudinal sectional view of the booth plate, Fig. 4 is a plan view of a part of the joint body,
FIG. 5 is a sectional view taken along the line -V in FIG. 4, and FIG. 6 is a longitudinal sectional view of the cap. 1 and 1' are the base plate, 4 is the joint body, 7 is the shrinkage absorption hole, and 8 is the water stop part.

Claims (1)

[Scope of utility model registration request] A joint main body 4 made of an elastic material is fastened to a base plate 1.1 fixed to an adjacent member 13.13', and a plurality of shrinkage absorbers 7 are formed on the joint main body 4, so that the upper and lower surfaces of the joint main body 4 are fixed. A plurality of clearance grooves 6 and 6' are formed along the entire length of the joint body 4 at regular intervals in the longitudinal direction of the joint body 4, and shrinkage absorption holes 7 are arranged in the width direction of the joint body 4 with the clearance grooves 6 and 6'. are connected at the upper and lower parts, a water stop part 8 made of a water stop film is formed in the shrinkage absorption hole 7 close to the upper opening 7a, and the water stop part 8 is formed upwardly in a concave manner. Characteristic expansion joint device.