JPS5923910Y2 - Patsuking - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backing used when inserting and connecting the socket of one tube to the socket of the other tube.

As a backing for connecting the socket of one pipe by inserting it into the socket of the other pipe, for example, as shown in Japanese Utility Model Publication No. 49-26747, there is a protrusion inclined to one side on the outer peripheral surface of a rubber cylindrical main body. There are backings with peripheral edges, etc., but when such backings are used at the connection between pipes, the contact pressure of the sloped surface of the protruding peripheral edge of the backing against the pipe socket is low;
There was a drawback that the water-stopping effect was not sufficient when the internal pressure was high when a flat load was applied to the buried pipe.

In order to improve these shortcomings, uniformly increasing the height and length of the protruding periphery will reduce the need for inserting the socket of one pipe into the socket of the other pipe through the backing. This method has disadvantages in that the insertion force increases, making it difficult to supervise lathing, and also easily damaging the tube insertion or tube socket, making it undesirable for pipe lathing.

In view of the above points, the present invention is easy to insert during piping construction,
Moreover, this was done with the purpose of providing a backing that has a large water-stopping effect when a flat load is applied and the internal pressure is high.

The gist of the present invention is that a backing body is provided with a flange sloped to one side along the circumferential direction on the outer circumferential surface of a cylindrical part made of an elastic body. An auxiliary ring having a protrusion along the circumferential direction on the outer circumferential surface of the end can be fitted freely, and the protrusion of the auxiliary ring can bulge outward from the flange of the backing body when mated. It resides in the backing.

The present invention will be explained below with reference to the embodiment shown in FIG.

1 is a backing body made of an elastic body, and a cylindrical part 11
A flange 12 is provided along the circumferential direction on the outer circumferential surface of the flange 12, which is inclined toward one end.

2 is an auxiliary ring which is made of a raw material from the backing body 1, and a protrusion 22 is provided on the outer surface of one end along the circumferential direction following an inclined surface 21 from one end, and its medium length and inner diameter are as follows. The middle length and outer diameter of the cylindrical portion 11 in the direction of inclination of the collar 12 of the backing body 1 are approximately the same, respectively.

The auxiliary ring 2 can be fitted onto the cylindrical part 11 of the flange 12 of the backing body 1 in the inclined direction, and when the auxiliary ring 2 is pushed in to the innermost part and fitted, the protrusion 22 can bulge the flange 12 outward. has been done.

Next, how the above embodiment is used will be explained with reference to FIGS. 2 and 3.

When inserting and connecting the socket 31 of one pipe 3 to the socket 41 of the other pipe 4 through the backing of the present invention, first place the backing body 1 on the end of the socket 31 of one pipe 3. Tsuba 12
The auxiliary ring 2 is fixed on the cylindrical body 11 of the flange 12 with the inclination direction facing toward the end, and the auxiliary ring 2 is fixed with one end of the side where the protrusion 22 is provided facing the flange 12. 1, so that the other end 23 is not fitted onto the cylindrical body 11 (see FIG. 1).

Next, the insertion port 31 is inserted into the socket 41 by sliding the outside of the backing body 1 onto the inner peripheral surface of the socket 41 of the other tube 4.

Finally, attach the end surface 24 of the other end 23 of the auxiliary ring 2 to the socket 4.
1, insert the socket 31 to the deep part of the socket 41, insert the auxiliary ring 2 inside the flange 12 of the backing body 1, and fit it. The flange 12 is bulged outward and pressed against the inner circumferential surface of the socket 41 to complete the connection (see FIG. 2).

As mentioned above, the backing of the present invention has a flange that is inclined to one side along the circumferential direction on the outer peripheral surface of a cylindrical part made of an elastic material, and the auxiliary ring can be fitted inside the flange of the backing main body. When mating, the auxiliary ring can bulge the collar outward, so when inserting one tube into the socket through the backing, shift the auxiliary ring to expand the backing body. It can be inserted without requiring any insertion force without the flange bulging outward, and in the final stage of joining, an auxiliary ring is fitted inside the flange of the backing body to bulge the flange outward. It can be brought into pressure contact with the inner circumferential surface of the socket, and the water-stopping effect is fully demonstrated even under high internal pressure when a flat load is applied to the buried pipe.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal front view showing an embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views illustrating the process of the implementation and example usage of FIG. 1, respectively. Explanation of symbols, 1...Backing body, 2...
... Auxiliary ring, 3... Socket, 4...
-Socket, 11...tubular part, 12...tsuba, 22...projection.

Claims (1)

[Scope of utility model registration request] A backing body is provided with a flange inclined to one side along the circumferential direction on the outer periphery of a cylindrical part made of an elastic body. A backing in which an auxiliary ring provided with a protrusion along the circumferential direction can be fitted freely, and the protrusion of the auxiliary ring can bulge outward from the flange of the backing body when the auxiliary ring is fitted.