JPS5911270Y2 - branch pipe fittings - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a branch pipe joint.

When drilling a hole in the pipe wall of a buried pipe, etc., and connecting the pipe here to make a branch, it is often impossible to work from inside the pipe.
Connection work is required from outside.

In this case, a flange is generally provided at one end of the connecting tube, and this flange surface is glued to the outer surface of the tube or tied with wire or the like.

Adhesive methods cannot be used until the adhesive has sufficiently hardened, and cannot be backfilled.

Further, it cannot be carried out in rainy weather or in places where there is water because no adhesive effect can be expected.

When tying with wire, etc., not only does it require space to wrap the wire around the outer periphery of the pipe, but the work itself is cumbersome.

In addition, grooves are provided on the outer periphery of the cylinder made of rubber-like elastic material,
One possible method is to fit this groove into the peripheral wall of the branch hole and insert and connect the branch pipe to this cylinder, but since the cylinder itself is made of a rubber-like elastic body, there is a drawback that the branch pipe easily separates. .

The gist of the present invention is that it is made of a cylindrical body, has a stepped portion near the proximal end, has an insertion opening 12 for a branch pipe at the distal end, and is designed to allow packing to be installed inside the insertion opening 12. concave groove 1
21, and an inner tube 2 for inserting into the proximal end of the joint body to hold the joint body in the branch hole a of the main pipe A. A step part 23 that is locked on the step part 11 of the main body 1 is provided, a locking piece 21 is provided at the proximal end facing outward, and the distal end extends to near the branch pipe insertion opening 12 of the joint main body 1. The branch pipe socket part 22 is shaped, and a plurality of split pipes 2a are formed from the distal end to the proximal end.
, 2b, and 2C.

Next, this invention will be explained with reference to embodiments of the drawings.

Reference numeral 1 designates a joint body, in which a stepped portion 11 is formed near the proximal end to be locked to the outer surface of the peripheral edge of the branch hole a of the main pipe A that is about to branch, and an insertion opening for the branch pipe is formed at the distal end. 12 is prominent.

121 is a groove for mounting a sealing packing.

2 is inserted into the base end of the joint body 1 and the joint body 1 is connected to the main pipe A.
This is an inner cylinder for holding in the branch hole a part of the cylinder, and locking pieces 21, 21, . . . are provided on the outside of the base end thereof.

The locking pieces 21, 21, . . . are for being locked to the inner surface of the peripheral edge of the branch hole a.

The inner tube 2 is provided with a stepped portion 23 that is locked onto the stepped portion 11 of the joint body 1.

The inner cylinder 2 is divided into three parts 2a, 2b, and 2C, and the divided cylinders 2a and 2b are fitted into each other by fitting portions having projections and recesses provided on the divided surfaces.

In this example, the interpolation cylinder 2 is divided into three parts,
It is not limited to the case where it is divided into three parts, but it may be divided into a plurality of parts.

The fitting portions of the split tubes 2a and 2b do not necessarily have to be provided.

The distal end of the inner tube 2 is expanded in diameter so that it is inserted deep into the tube insertion section 12 of the joint body 1 to form a branch tube socket 22 .

Incidentally, one of the split tubes, for example, the split tube 2a, is attached to the joint body 1 in advance.
may be integrally provided at a predetermined location.

When using the branch pipe joint of this invention, two of the split pipes 2a, 2b, and 2C of the inner pipe 2 are inserted into the joint body 1 while being connected to each other by fitting the concave and convex portions. For example, with the split tube 2b centered, insert the proximal end of the annular elastic body 3 into the branch hole a of the tube A.
Insert via.

After insertion, expand the split tube 2b outward and insert the locking piece 21 into the branch hole a.
The remaining split tubes 2C are locked inside the peripheral edge of the split tubes 2a and 2.
and b.

It is also possible to attach the split tubes 2a and 2b to the joint body 1 in advance without inserting them into the joint body 1, and then insert them into the joint body 1 sequentially from the outside. In addition to having a U-shaped cross section, it may be interposed between the outer surface of the peripheral edge of the branch hole a and the step portion 11.

In this way, attach the branch pipe joint to the branch hole a of pipe A,
A branch pipe (not shown) is inserted into and connected to the branch pipe insertion portion 12 of the joint body 1 .

The insertion part of the branch pipe is inserted into the branch pipe socket part 22 of the inner tube 2, and the outer peripheral surface of the branch pipe is aligned with the groove 12 on the inner surface of the insertion opening part of the branch pipe.
1, and the insertion end of the branch pipe is positioned in contact with the stepped portion 23 of the branch pipe receptacle 22.

Further, since the split tubes 2a, 2b, and 2C are pressed against the inner surface of the joint body 1 by the insertion ends of the branch pipes, displacement or removal of the inner tubes is prevented.

According to the present invention, since the above-mentioned structure is provided, a part of the inner tube 2 divided into a plurality of split tubes 2a, 2b, 2C is inserted into the joint body 1 in advance, and the remaining part is inserted into the joint body 1 or All of them can be inserted and set from the outside of the pipe to be branched, that is, from the branch pipe insertion opening 12 of the joint body 1, and therefore the branch pipe joint can be easily inserted into the branch hole a part of the main pipe A from the outside without using adhesive. Can be installed.

In addition, since the tip of the inner tube 2 inserted into the joint body 1 constitutes the inner part of the branch tube socket 22, the insertion end of the branch tube allows the split tubes 2a, 2b, 2C is the joint body 1
The inner tube 2 is firmly held without shifting or coming off, and the branch pipe joint itself is firmly attached to the main pipe A.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an example of the branch pipe joint of this invention along with its usage state, Fig. 2 is a partially cutaway perspective view showing the main body of the branch pipe joint of Fig. 1, and Fig. 3 FIG. 2 is a perspective view of each split piece constituting the inner tube in the branch pipe joint of FIG. 1; 1... Joint body, 2... Inner cylinder, 2a, 2b,
2C...Split tube, 12...Branch tube insertion port, 21.
...Locking piece, 22... Branch pipe socket, 11.23...
Step part, 121...concave groove, A...main pipe, a...branch hole.

Claims (1)

[Scope of utility model registration request] It is made of a cylindrical body, with a step near the proximal end, a branch pipe insertion opening at the distal end, and a groove for attaching the packing inside the insertion opening. It consists of a joint body and an inner tube that is inserted into the proximal end of the joint body to hold the joint body in the branch hole of the main pipe, and the inner tube is locked onto the stepped part of the joint body. A step is provided, a locking piece is provided outward at the proximal end, and the distal end extends close to the branch pipe insertion opening of the joint body, forming a branch pipe receptacle, and the proximal end extends from the distal end to the base. A branch pipe joint that is divided into multiple split pipes towards the end.