JPH0429190Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cylindrical joint rubber, and is particularly used for the joint between a prefabricated concrete manhole (hereinafter referred to as "manhole") and a sewerage concrete fume pipe (hereinafter referred to as "huum pipe"). The present invention relates to a rubber joint, that is, a cylindrical joint rubber, which is suitable for use as a rubber joint.

Conventionally, at the joint between a manhole and a hump pipe, a hole larger than the outside diameter of the hume pipe to be used is drilled in the outer wall of the manhole in advance, and after the hume pipe is attached, mortar is poured into the joint between the manhole and the hume pipe. They are joined by eliminating gaps. However, if the connections between the manhole and the mortar and between the mortar and the pipe are weak, water will seep out, making the bottom of the pipe or manhole unstable, and the pipe may crack due to earth pressure from above. Bends occur, increasing water leakage. On the other hand, there was a drawback that water from the soil could flow in.

The present invention aims to provide a cylindrical joint rubber that eliminates these drawbacks.

The present invention, as shown in FIGS. 1 to 4, is a cylindrical joint rubber that is applied to the joint between a concrete manhole and a concrete hume pipe, and is inserted coaxially into the end of a concrete hume pipe. During construction, a butyl rubber adhesive is pasted between the protruding part that protrudes in the axial direction at one end of the cylindrical part and the outer surface of the edge that is attached in the radial direction of the cylindrical part in the form of a brim. The edges are
The cylindrical part has a shape that is wide at the top, and further includes a bellows part on the cylindrical part, a butyl rubber adhesive layer on the inner diameter surface, and a tightening rubber band that is tightened from the outside of the cylindrical part. .

That is, in the present invention, the protrusions 1 and 2 of the joint rubber 9 are inserted into a hole made in the outer wall of the manhole 7 up to a predetermined position together with the fume pipe 8, and this hole is plugged with mortar 10. Next, the joint rubber edge 3 is attached to the outer wall surface of the manhole using an adhesive. At this time, the manhole hole is Huyum pipe 8.
Since the outer diameter of the joint rubber 9 is larger than the outer diameter of the joint rubber, it is difficult to fix the fume tube 8 in the center of this hole, and it tends to be in a position that is shifted downward.In order to absorb this shift, the edge 3 of the joint rubber 9 is widened upward. It has been done.

Place the adhesive layer 5 on the other end of the cylindrical joint rubber 9 with a rubber band 6 from the outside.
Tighten and crimp to secure. At this time, the cylindrical part 11
It is further preferred to inject an adhesive caulk at the extreme end of the tube. That is, the adhesive on the outer surface 3a of the edge 3 of the cylindrical joint rubber 9 and the adhesive layer 5 on the end of the cylindrical part 11 prevent water from flowing out from inside and outside.
Inflow can be prevented.

The rubber used for the cylindrical joint rubber does not need to be specified since it is used in the soil where there is no sunlight, but a strong natural rubber is preferable, and one with bacteria resistance is more preferable.

The adhesive used for the adhesive layer 5 is preferably a butyl rubber type adhesive having good adhesive durability. As mentioned above, in addition to having a water-stopping effect, if the Huyum pipe 8 moves due to shock, earthquake, or ground movement, the Huyum pipe 8
The force applied to the joint between the pipe and the manhole 7 is absorbed by the rubber elasticity and flexibility of the protrusions 1 and 2 embedded in the mortar and the bellows 4 of the cylindrical part 11, thereby preventing the hume pipe 8 from cracking or breaking. You can also do it.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a cylindrical joint rubber according to an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is a cross-sectional view showing the state in which it is installed at a manhole/fume pipe joint. This is a schematic diagram, and the fourth
The figure is an enlarged detailed view of section A in FIG. 3. 1, 2... Protrusion of cylindrical joint rubber, 3
... Edge, 4 ... Bellows part, 5 ... Adhesive layer inside cylindrical part 11, 3a ... Outer surface of joint rubber edge 3 (adhesive adhesive surface), 6 ... Tightening rubber band,
7... Manhole, 8... Huyume pipe, 9... Cylindrical joint rubber, 10... Mortar, 11...
...Cylindrical part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cylindrical joint rubber 9 applied to a joint between a concrete manhole 7 and a concrete hump pipe 8, one end of a cylindrical part 11 that is coaxially inserted into the end of the concrete hump pipe 8. During construction, a butyl rubber adhesive is pasted between the protruding parts 1 and 2 that protrude in the axial direction and the outer surface 3a of the edge part 3 attached in the radial direction of the cylindrical part 11 in the shape of a brim. The portion 3 has a shape that is wider at the upper part, and further includes the cylindrical portion 1.
A cylindrical joint rubber comprising: 1 a bellows portion 4; a butyl rubber adhesive layer 5 on the inner diameter surface; and a tightening rubber band 6 which is tightened from the outside of the cylindrical portion 11.