JPH04285390A - Constructing method of branched pipe joint - Google Patents

Abstract

PURPOSE:To improve the workability and water stopping property and fall the separation of a socket short pipe by pulling up a locking part provided on the top end of the socket short pipe to an original pipe buried in the ground and a saddle by the operation of a holding jig, and compressively deforming a rubber ring to press-fit it to the bore part of a mounting hole. CONSTITUTION:A socket short pipe 12 for branched pipe connection is attached to an original pipe 11 buried in the ground. In this case, an excavation hole is drilled from the ground surface to the branched pipe connecting part of the original pipe 11, and a mounting hole 11A is bored in the branched pipe connecting part. On the other hand, a builtup body having an outer diameter dimension receivable within the cross section of the excavation hole and consisting of the socket short pipe 12, a saddle 13 and a rubber ring 14 is prepared. The builtup body is held by a holding jig 33, and the top end of the socket short pipe 12 is inserted to the mounting hole 11A, and the saddle 13 is brought into contact with the peripheral outer surface of the mounting hole 11A. A locking part 21 provided on the top end of the socket short pipe 12 is pulled up by the operation of the holding jig 33, whereby the rubber ring 14 is compressively deformed and press-fitted to the bore part of the mounting part 11A.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a branch pipe joint.

0002

[Prior Art] In a conventional branch pipe joint, when attaching a short socket pipe for connecting a branch pipe to an attachment port provided on a main pipe, a saddle is glued to the outer circumference of the main pipe so as to tightly fit it. , a short socket pipe is attached to this saddle.

[0003] In other conventional branch pipe joints,
A caulking material is filled between the outer periphery of the above-mentioned original pipe and the saddle to improve water-stopping properties.

0004

[Problems to be Solved by the Invention] However, the above-mentioned conventional technology constructs a branch pipe joint using a wet attachment method using adhesive, which has poor workability, and it is difficult to improve water-stopping properties and strength. There is a limit.

[0005] Furthermore, when the original pipe has ribs on the outer periphery of the pipe body, in order to ensure high water-stopping properties, it is necessary to fit the saddle closely along the complicated rib shape, making the construction complicated. Become.

[0006] In the conventional branch pipe joint, in order to construct the branch pipe joint by a dry installation method that does not use adhesive, the tip of the short pipe is inserted into the rubber ring provided at the connection port of the original pipe. There is also a type that press-fits the pipe, but there is a concern that the short pipe may come off.

[0007] The present invention improves workability, improves water-stopping properties and strength, and reliably prevents detachment of the short socket pipe when attaching the short socket pipe to the attachment port of the original pipe. The purpose is to

[0008]

[Means for Solving the Problems] The present invention as set forth in claim 1 provides a method for constructing a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to a master pipe buried underground. An excavation hole is excavated from the ground surface to the branch pipe connection site of the source pipe using an excavator, and an attachment port is drilled at the branch pipe connection site of the source pipe, and an outer diameter size that fits within the cross section of the excavation hole is determined. , an assembly consisting of at least three members: a short socket tube, a saddle attached to the outer periphery of the short socket tube, and a rubber ring attached to the outer periphery of the short socket tube on the distal side of the saddle attachment position. Prepare the assembly, grip the assembly with a gripping jig, insert the tip of the short socket tube into the fitting opening, and abut the saddle against the outer surface of the periphery of the fitting opening of the original tube. By operating the gripping jig, the locking part provided at the tip of the short pipe is pulled up against the original pipe and the saddle, and the rubber ring is compressed and deformed to fit into the inner diameter of the fitting. It is designed to be crimped.

The present invention as set forth in claim 2 is the invention as set forth in claim 1, further comprising an operation ring portion for the short socket pipe to be gripped and rotated by the gripping jig. By adjusting the engagement position between the concave-convex engaging part provided on the operation ring and the concave-convex engaging part provided on the saddle, the locking part provided at the tip of the short socket pipe can be adjusted. It is designed to be pulled up against the original tube and the saddle.

0010

[Function] According to the present invention, the following effects (1) to (4) are achieved.

■By rotating the operation ring, the rubber ring provided on the outer periphery of the short socket pipe is compressed and deformed, and is crimped onto the inner diameter of the socket of the original pipe, and no adhesive is used. Because it is a dry installation method, it is easy to install, has waterproof properties,
Strength can be improved.

(2) Since the locking portion provided at the tip of the short socket tube can be locked onto the inner surface of the peripheral edge of the socket, there is no fear that the short socket tube will come off.

■The outer diameter of the assembly consisting of at least three members, the short socket pipe, the saddle, and the rubber ring, is set to fit within the cross section of the excavation hole, and the assembly is gripped with a gripping jig. It is easy to install because it is attached to a fitting hole drilled in the original pipe from a drilled hole.

[0014]

[Example] Figure 1 is a schematic diagram showing the construction process of the present invention, Figure 2
3 is a schematic diagram showing a gripping jig, FIG. 3 is a sectional view showing a branch pipe joint, and FIG. 4 is an exploded view showing the components of the branch pipe joint.

As shown in FIGS. 3 and 4, the branch pipe joint 10 has an attachment port 11 provided in a base pipe 11 such as a Hume pipe or a PVC pipe.
A short socket pipe 12 for connecting a branch pipe is attached to A, and the components include a saddle 13 and a rubber ring 14.

In addition, as shown in FIGS. 3 and 4, the short socket pipe 12 has a split ring 1 between the operating ring portion 15 and the small diameter neck portion 16.
A rubber ring 1 is attached to the inner surface of the upper end of the operating ring section 15 to be interposed between the branch pipe and the inner surface of the lower end of the operating ring section 15. A rubber ring 2 is attached between the small diameter neck portion 16 and the small diameter neck portion 16. 17A is a ring groove provided in the operation ring portion 15;
B is a ring groove provided in the small diameter neck portion 16.

However, the branch pipe joint 10 has a lock that can be locked on the inner surface of the periphery of the fitting 11A at the tip of the short socket pipe 12 located on the inner side of the periphery of the fitting 11A in the original pipe 11. A section 21 is provided. The locking portion 21 is connected to the attachment opening 11A.
It has an enlarged brim shape with a smaller diameter than the inner diameter part.

The branch pipe joint 10 also includes a short socket pipe 12 located on the outer surface side of the peripheral edge of the fitting port 11A of the original pipe 11.
A saddle 13 is attached to the outer periphery of the mounting opening 11A so as to be in contact with the outer surface of the periphery of the mounting opening 11A.

The branch pipe joint 10 also includes a rubber ring for sealing the attachment port 11A of the original pipe 11 between the locking portion 21 on the outer circumference of the short socket pipe 12 and the mounting portion of the saddle 13. 1
I am wearing 4.

Here, the small diameter neck portion 16 of the short socket pipe 12 is as follows:
The saddle 13 is provided with the following positioning structure. That is, a cylindrical bulge 13A is formed to protrude from the center of the saddle 13. The inner surface of the cylindrical bulge 13A,
On the outer surface of the small-diameter neck portion 16 of the short socket pipe 12 facing each other, there are grooves 22 and protrusions 23 in the shape of an uneven surface that engage with each other.
It is provided in the axial direction of the The engagement between the groove 22 and the protrusion 23 allows the saddle 13 and the small diameter neck 16 to be positioned and prevented from rotating.

On the other hand, since the operating ring portion 15 of the short socket pipe 12 is rotatable relative to the small diameter neck portion 16 as described above, the operating ring portions 15 are prevented from rotating relative to each other as described above. The saddle 13 and the small diameter neck portion 16 can be rotated.

By rotating the operating ring portion 15, the branch pipe joint 10 connects the uneven engaging portion 15A provided on the operating ring portion 15 and the uneven engaging portion 13A provided on the bulging portion 13A of the saddle 13. By adjusting the engagement position with the portion 13B, the entire short socket pipe 12 can be connected to the original pipe 11 and the saddle 1.
It is configured so that it increases compared to 3.

At this time, the rubber ring 14 is attached to the base tube 1 with a width greater than the wall thickness of the base tube 11 at the outer circumference of the tip of the short socket tube 12.
The enlarged-diameter brim-shaped locking part 21 of the short socket pipe 12 is pulled up as the short socket pipe 12 is pulled up by the rotating operation of the operating ring part 15. Then, the rubber ring 14 is gradually pushed outward, and the rubber ring 14 is secured to the inner surface of the attachment opening 11A in a state where it is sandwiched between the rubber ring 14 and the inner diameter portion of the attachment opening 11A.

Further, the rubber ring 14 is sandwiched between the locking portion 21 and the inner diameter portion of the attachment opening 11A, and is compressed and deformed to seal the attachment opening 11A.

A construction method for attaching the branch pipe joint 10 to the attachment port 11A of the original pipe 11 buried underground will be explained below.

(1) The original pipe 1 is removed from the ground surface by the excavator 31.
Drill an excavation hole 32 to the branch pipe connection point of No. 1 (Fig. 1 (
See A).

(2) A fitting port 11A is bored at the branch pipe connection site of the master pipe 11 (see FIG. 1(A)).

(3) An assembly consisting of the short socket pipe 12, saddle 13, and rubber ring 14 is prepared. The assembly is sized to fit within the cross-section of the borehole 32.

(4) Grasp the above assembly with the gripping jig 33 and insert the tip of the short socket tube 12 into the attachment port 11A from the ground surface, and place the saddle 13 around the periphery of the attachment port 11A of the original tube 11. (See Figure 2).

Note that the gripping jig 33 can be gripped so as to engage in the rotational direction convex portions 34 provided at a plurality of circumferential positions on the outer periphery of the operating ring portion 15 of the short socket pipe 12. It is equipped with a grip part 35 that can be used. The grip portion 35 includes a leaf spring 36 that holds the lower surface of the convex portion 34, and the leaf spring 36 can be elastically bent and deformed when the convex portion 34 is inserted.

(5) Operating section 3 of grasping jig 33 on the ground surface
7 rotates the operation ring portion 15 of the short socket pipe 12 with respect to the saddle 13 and the small diameter neck portion 16. As a result, the locking portion 2 provided at the tip of the short socket pipe 12
1 to the original tube 11 and the saddle 13, the rubber ring 14 is compressed and deformed to be crimped onto the inner diameter part of the attachment port 11A,
In addition, the locking portion 21 is locked to the inner surface of the peripheral edge of the mounting opening 11A.

Next, the operation of the above embodiment will be explained.

[0033] By rotating the operation ring part 15, the rubber ring 14 provided on the outer circumference of the short socket pipe 12 is compressed and deformed, and is crimped onto the inner diameter part of the attachment port 11A of the original pipe 11. Since it is a dry installation method that does not use adhesives, it is easy to install and can improve water-stopping properties and strength.

(2) Since the locking portion 21 provided at the tip of the short socket tube 12 can be locked to the inner surface of the peripheral edge of the fitting port 11A, there is no fear that the short socket tube 12 will come off.

■The outer diameter of the assembly consisting of at least three members, the short socket pipe 12, the saddle 13, and the rubber ring 14, is set to fit within the cross section of the excavated hole 32, and the assembly is gripped and fixed. It is attached to the attachment port 11A drilled in the original pipe 11 from the excavation hole 32 using the tool 33, and has good workability.

[0036]

Effects of the Invention As described above, according to the present invention, when attaching a short socket pipe to the attachment port of the original pipe, workability is improved, water-stopping property and strength are improved, and It is possible to reliably prevent the short tube from coming off.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the construction process of the present invention.

FIG. 2 is a schematic diagram showing a gripping jig.

FIG. 3 is a sectional view showing a branch pipe joint.

FIG. 4 is an exploded view showing the components of the branch pipe joint.

[Explanation of symbols]

10 Branch pipe fitting 11 Original tube 11A Installation port 12 Socket short pipe 13 Saddle 14 Rubber ring 15 Operation ring part 21 Locking part 31 Excavator 32 Drilling hole 33 Gripping jig

Claims (2)

[Claims] [Claim 1] In a method for constructing a branch pipe joint in which a short port pipe for connecting a branch pipe is attached to a main pipe buried underground, an excavator is used to extend from the ground surface to the branch pipe connection site of the main pipe. An excavation hole is excavated, an attachment port is bored at the branch pipe connection site of the original pipe, and a short socket pipe with an outer diameter that fits within the cross section of the excavation hole, and an outer periphery of the short socket pipe. Prepare an assembly consisting of at least three members: a saddle attached to the socket, and a rubber ring attached to the distal end of the saddle attachment position on the outer periphery of the short socket pipe, and grip the assembly with a gripping jig. Then, insert the tip of the short socket pipe into the fitting opening, and abut the saddle against the outer surface of the peripheral edge of the fitting opening of the original pipe, and by operating the gripping jig,
A branch pipe joint characterized in that a locking part provided at the tip of the short socket pipe is pulled up with respect to the original pipe and the saddle, and the rubber ring is compressed and deformed to be crimped onto the inner diameter part of the fitting port. construction method. 2. The short socket tube includes an operating ring portion that is gripped and rotated by the gripping jig, and a concave-convex engaging portion provided on the operating ring portion and a concave-convex engaging portion provided on the saddle. The branch pipe joint according to claim 1, wherein the locking part provided at the tip of the short socket pipe is pulled up with respect to the original pipe and the saddle by adjusting the engagement position with the uneven engaging part. Construction method.