JPH0410254Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a vertical expansion joint for roads, and more specifically to a road expansion joint that is attached to joints of roads, bridges, etc. to absorb expansion and contraction due to temperature changes. This paper relates to improvements to vertical expansion joints.

[Prior art]

Expansion joints are generally used in joints of roads, bridges, etc. to absorb expansion and contraction due to temperature changes in roads, bridges, etc.

By the way, as a conventional vertical expansion joint for roads, for example, as shown in FIG. A pair of vertical members 3
a, 3b, and road rubber 4 attached to the road side end portions of the vertical members 3a, 3b,
In addition, for the purpose of blocking contact noise between the road surface rubber 4 and the vehicle that is generated when the vehicle is running, the vertical members 3a and 3b are
A lower insulating rubber 5 is attached to the lower end of the member, and a sound absorbing material 6 such as foam or glass wool is interposed in the space between the vertical members 3a and 3b.

In the conventional vertical road expansion joint as described above, vertical members 3a and 3b for fixing are attached to both sides of the road surface rubber 4 and the lower sound insulating rubber 5, and anchors are attached to the vertical members 3a and 3b. The members 1a and 1b are integrally attached by welding.

However, in the case of such conventional vertical road expansion joints, relatively soft rubber with a JIS hardness of 50° to 60° is used, taking into account the riding comfort of the road surface rubber 4. At the same time, the vertical members 3a, 3
The upper end of b has a thickness of 10 to 15 mm and protrudes from the road surface 2, and the road surface rubber 4 is made of vertical members 3a and 3b.
In order to prevent end peeling of the vertical member 3a,
3b, there was a problem in that the corner portion 7a of the post-concrete material 7 would be damaged due to the bending of the road rubber 4.

[Purpose of invention]

This idea was devised by focusing on these conventional problems, and its purpose is to
It can effectively absorb the expansion and contraction caused by temperature changes at the joints of bridges, etc., and it also minimizes the deflection of the road rubber as much as possible, improving the reinforcing effect of the corners of the post-cast material, thereby improving the strength of the corners of the post-cast material. To provide a vertical expansion joint for roads that effectively prevents damage to the road.

[Example of idea]

In order to achieve the above-mentioned purpose, this idea is designed to apply JIS road rubber to the parts that come into contact with the post-applied road rubber material.
Edge reinforcement rubber with a JIS hardness higher than the hardness is integrally formed during vulcanization bonding, minimizing deflection of the road surface rubber and improving the reinforcing effect of the corners of the post-applied material. The gist of this invention is to be able to effectively prevent damage to the corners of the cast material.

[Example of idea]

Embodiments of this invention will be described below based on the accompanying drawings.

In the following description, the same components as those of the above-mentioned conventional example will be described with the same reference numerals.

Fig. 1 shows a cross-sectional view of a joint X of a road, bridge, etc. where this invention was implemented (a cross-sectional view in a direction perpendicular to the longitudinal direction of the road or bridge). A pair of vertical members 3a, 3b are fixed via fixed anchor members 1a, 1b, and road rubber 4 is attached to the end portions of the vertical members 3a, 3b on the road surface 2 side.

Edge reinforcing rubbers 9a and 9b having a JIS hardness higher than the JIS hardness of the road rubber 4 are integrally bonded by vulcanization to the corner portions 4a of the road rubber 4 in contact with the post-applied material 7. It is provided. The JIS hardness of the end reinforcing rubbers 9a and 9b is such that the JIS hardness of the end reinforcing rubber is 70° or more, preferably 80° or more, whereas the JIS hardness of the road rubber 4 is 50° to 60°. Set to 90°.

In this way, by setting the JIS hardness of the end reinforcement rubbers 9a and 9b to be larger than the JIS hardness of the road surface rubber 4, the deflection of the road surface rubber 4 can be minimized, and the corner portions of the post-cast material 7 can be The reinforcing effect of 7a can be improved.

In addition, for the purpose of blocking contact noise between the road surface rubber 4 and the vehicle that is generated when the vehicle is running, the vertical members 3a,
A lower insulation rubber 5 is attached to the lower end of the vertical members 3b, and a sound absorbing material 6 such as foam or glass wool is interposed in the space between the vertical members 3a and 3b. Note that this sound absorbing material 6 does not necessarily need to be provided in the space between the vertical members 3a and 3b as shown in FIG.

Further, FIG. 2 shows a modification of the end reinforcing rubbers 9a and 9b, and this embodiment shows the end reinforcing rubbers 9a and 9b.
The road surface 2 side of 9b is extended horizontally as shown by the dotted line in the figure to form a substantially triangular shape, so that the reinforcing effect of the corner 7a of the post-cast material 7 can be further improved. .

That is, the extending portions 10 of the end reinforcing rubbers 9a, 9b
a and 10b cover the upper surface of the corner portion 7a of the post-casting material 7 on the road surface 2 side, thus effectively preventing damage due to bending of the road surface 4, etc.

Note that the other configurations are the same as those in the above embodiment, so the same reference numerals are given and the explanation will be omitted.

[Effect of idea]

As mentioned above, this idea consists of a pair of vertical members that are fixed to the post-casting material of the road surface via anchor members at the joints of roads, bridges, etc., and a road surface that is attached to the end of the vertical member on the road surface side. In a road vertical expansion joint made of rubber, the JIS road rubber
By integrally providing end reinforcement rubber with JIS hardness that is higher than JIS hardness, it is possible to effectively absorb the expansion and contraction caused by temperature changes at the joints of roads, bridges, etc., and to minimize the deflection of the road surface rubber. This has the effect of improving the reinforcing effect of the corners of the post-cast material and effectively preventing damage to the corners of the post-cast material.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a vertical road expansion joint in which this invention was implemented, Figure 2 is a cross-sectional view showing a modification of the end reinforcement rubber in the vertical road expansion joint, and Figure 3 is another embodiment. FIG. 4 is a sectional view of a conventional vertical expansion joint for roads. 1a, 1b... Anchor member, 2... Road surface, 3
a, 3b...vertical member, 4...road rubber, 7...
Post-molded material, 9a, 9b...End reinforcement rubber, 10
a, 10b...extending portion, X...seam.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of vertical members fixed to a post-fabricated material on the road surface via an anchor member at a joint of a road, bridge, etc., and a pair of vertical members attached to the end portion of the vertical member on the road surface side. In a vertical road expansion joint composed of road rubber, an end reinforcing rubber having a JIS hardness higher than the JIS hardness of the road rubber is integrally provided in the part that comes into contact with the post-applied material of the road rubber. A vertical expansion joint for roads that is characterized by: 2 When the JIS hardness of the road rubber is 50° to 60°,
Utility model registration claim 1 characterized in that the JIS hardness of the end reinforcement rubber is set at 70° to 90°
Vertical expansion joints for roads as described in section. 3. The vertical expansion joint for roads according to claim 1, wherein the road surface side of the end reinforcing rubber is extended horizontally to form a substantially triangular shape.