JP3462012B2 - Sewer branch pipe fittings and sewer pipes with branch pipe fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewer branch pipe joint and a sewer pipe with a branch pipe joint, and more particularly to a sewer branch pipe joint and a sewer pipe with a branch pipe joint used for branching a branch pipe from a sewer main pipe, for example. Regarding

[0002]

2. Description of the Related Art An example of this kind of conventional sewer branch pipe joint is disclosed in Japanese Patent Laid-Open No. 174283/1995. In this conventional technique, the saddle part (main pipe covering part) and the joint part (bellows part) are integrally molded with a flexible material such as rubber, and the saddle is pressed against the outer surface of the main pipe with a pressing cover. It is designed to be fixed. Then, when joining the branch pipes, the lower end of the branch pipe is brought into contact with a branch pipe contact portion provided in a part of the joint portion to fix the joint portion and the branch pipe.

[0003]

In the prior art, although the seismic resistance can be obtained by the joint portion (bellows portion) made of a flexible material, the branch pipe abutting portion is made of the flexible material. Therefore, there is a problem that the load resistance against the dropping of the branch pipe is small and it is not suitable for deep burying. Therefore, a main object of the present invention is to provide a sewer branch pipe joint and a sewer pipe with a branch pipe joint capable of increasing the withstand load against the drop of the branch pipe while maintaining the earthquake resistance.

[0004]

A first aspect of the present invention is a sewer branch pipe joint for connecting a branch pipe to a branch hole provided in a pipe wall of the sewer main pipe, which is mounted on an outer surface of the sewer main pipe. And a saddle part having a hole adapted to the branch hole, a rising part raised from the peripheral edge of the hole to the outer surface side of the saddle part, a hard material
Made of material, and is fitted to the inner peripheral surface of the rising part
Formed on the upper edge of the joint and located on the upper edge of the riser
A ring with a collar and an elastic material,
It is attached to the outer peripheral surface of the lifting part and receives the lower end of the branch pipe.
It has a hand part, and when the branch pipe is joined to the joint, the lower end of the branch pipe
It is a sewer branch pipe joint that abuts on the upper end of the collar .

A second aspect of the present invention comprises a pipe main body, a branch hole provided in a pipe wall of the pipe main body, a rising portion raised from the peripheral edge of the branch hole to the outer surface side of the pipe main body, a hard material, and a rising portion. Part of
Is it formed on the fitting part to be fitted on the inner peripheral surface and on the upper end of the fitting part?
Phosphorus having a collar disposed on the upper end of the rising portion.
Made of elastic material and elastic material, mounted on the outer peripheral surface of the rising
The sewer pipe with a branch pipe joint is provided with a joint part for receiving the lower end of the branch pipe, and when the branch pipe is joined to the joint part, the lower end of the branch pipe abuts on the upper end of the collar .

[0006]

[Operation] When the branch pipe is displaced relative to the sewer main pipe due to ground displacement due to an earthquake or the like, the joint section made of a flexible material bends, causing distortion of the pipeline at the branch section. Can be absorbed. Further, even when the sewer main is deeply buried, even if an excessive force is applied from the branch pipe to the branch pipe abutting portion, the branch pipe abutting portion is formed of a hard material and is not deformed.

[0007]

According to the first and second aspects of the present invention, it is possible to increase the withstand load against the drop of the branch pipe while maintaining the earthquake resistance. Therefore, it can be applied to the case where the sewer main is deeply buried. The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0008]

EXAMPLE A sewer branch pipe joint 10 of the embodiment shown in FIGS. 1 and 2 has a branch hole 1 provided in a pipe wall of a sewer main 12.
4 for connecting the branch pipe 16 to 4 with flexibility, and a saddle portion 18 mounted on the outer surface of the sewer main pipe 12,
It includes a joint portion 22 for receiving the ring 20 and the branch pipe 16.

The saddle portion 18 is made of a synthetic resin such as hard vinyl chloride and includes a substantially plate-shaped main body 24 having an inner surface along the outer surface of the sewer main 12. A hole 26 that fits the branch hole 14 is formed in a substantially central portion of the main body 24, and rises from the peripheral edge of the hole 26 to the outer surface side of the main body 24 and rises up.
Is formed. Further, on the outer surface of the main body 24, a protrusion 32 for positioning the number wire 30 described later is formed.

The ring 20 is made of a hard material such as hard vinyl chloride, and includes a substantially cylindrical fitting portion 34 that is fitted to the inner peripheral surface of the rising portion 28. A flange 36 having an outer diameter slightly larger than the outer diameter of the rising portion 28 is formed on the outer peripheral surface of the upper end portion of the fitting portion 34. Therefore, when the ring 20 (fitting portion 34) is fitted to the inner peripheral surface of the rising portion 28, the peripheral edge portion of the collar 36 is horizontally projected from the outer surface of the rising portion 28. The upper end surface of the ring 20 serves as a branch pipe contact portion.

The joint portion 22 includes a substantially cylindrical body 38 made of an elastic material such as rubber. A portion of the main body 38 above the central portion in the axial direction is formed to have a substantially bellows-shaped cross section.
At the lower end of 8, a fitting portion 40 that fits on the outer peripheral surface of each of the rising portion 28 and the collar 36 is formed. Also,
Tightening band mounting grooves 42 are formed on the outer peripheral surfaces of the upper end portion and the lower end portion of the main body 38, and ridges 44 are formed on the inner peripheral surfaces thereof.

When manufacturing the sewer branch pipe joint 10, as shown in FIG. 3, the ring 20 is attached to the inner peripheral surface of the rising portion 28.
The (fitting portion 34) is fitted and adhered, and the joint portion 22 (fitting portion 40) is fitted to the outer peripheral surface of the rising portion 28. Then, the lower end portion of the joint portion 22 is tightened by the tightening band 46 (FIGS. 1 and 2) mounted in the groove 42 to join the joint portion 22 and the saddle portion 18. At this time, the protrusion 44 formed on the inner peripheral surface of the fitting portion 40 is compressed, and the gap between the joint portion 22 and the rising portion 28 is sealed.

When the branch pipe 16 is branched from the sewer main pipe 12 by using the sewer branch pipe joint 10 as described above, first, a branch saw 14 having a predetermined diameter is used at a predetermined position of the sewer main pipe 12 by using a hole saw. To drill. Next, the saddle section 18
After applying the adhesive to the inner surface of the (main body 24), the saddle portion 18 is positioned on the outer surface of the sewer main 12 so that the hole 26 and the branch hole 14 are aligned with each other. Then, the number wire 30 is wound around the outer peripheral surfaces of the sewer main pipe 12 and the saddle portion 18, and these are fastened to firmly bond the both. Then, the branch pipe 16 is inserted into the joint portion 22 until the lower end contacts the upper end surface (branch pipe contact portion) of the ring 20, and the upper end portion of the joint portion 22 is tightened with the tightening band 46 to form the joint portion 22. The branch pipe 16 is connected.

According to this embodiment, it is possible to increase the withstand load against the drop of the branch pipe 16 while maintaining the earthquake resistance. That is, when the branch pipe 16 is relatively displaced with respect to the sewer main pipe 12 due to the ground displacement due to an earthquake or the like, the joint portion 22 made of a flexible material is bent, so that the pipe line at the branch portion is formed. Distortion can be absorbed. In addition, even if the sewer main pipe 12 is deeply buried, even if an excessive force acts on the ring 20 from the branch pipe 16, the ring 2
Since 0 is formed of a hard material, it does not deform.

The sewer pipe with branch pipe joint 50 of the embodiment shown in FIGS. 4 and 5 includes a pipe main body 52 constituting a main sewer pipe, and one end of the pipe main body 52 is formed as a rubber ring receiving port 54. The other end is configured as the spigot 56. And
A branch hole 58 is formed in a substantially central portion of the pipe body 52, and a rising portion 60 is formed by rising from the peripheral edge of the branch hole 58 to the outer surface side of the pipe body 52. The rising portion 60 corresponds to the rising portion 28 (FIGS. 1 and 2) in the previous embodiment, and the ring 20 (fitting portion 3 is provided on the inner peripheral surface of the rising portion 60.
4) is fitted, the joint portion 22 (fitting portion 40) is fitted to the outer peripheral surface, and the branch pipe 16 is connected to the joint portion 22.

According to this embodiment, since the work of mounting the saddle part on the sewer main is not required, the workability is good. In each of the above-described embodiments, the rising portion 28 or 60 and the ring 20 are separately molded and adhered to each other, but they may be integrally molded.

In each of the above-described embodiments, the collar 36 of the ring 20 is locked to the joint portion 22 (fitting portion 40) to prevent the joint portion 22 from coming off. As shown in FIG. 6, a convex portion 62 is formed on the inner peripheral surface of the joint portion 22 (fitting portion 40), while a concave portion 64 is formed on the outer peripheral surface of the rising portion 28 or 60, and both are fitted together. This may prevent the joint portion 22 from coming off. Further, for example, as shown in FIG. 7, a female screw 66 is formed on the inner peripheral surface of the joint portion 22 (fitting portion 40), while a male screw 68 is formed on the outer peripheral surface of the rising portion 28 or 60, and both are formed. The joint portion 22 may be prevented from coming off by screwing.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of the embodiment shown in FIG.

FIG. 3 is an illustrative view showing the manufacturing method of the embodiment in FIG. 1;

FIG. 4 is an illustrative view showing another embodiment of the present invention.

FIG. 5 is an enlarged view of a main part of the embodiment shown in FIG.

FIG. 6 is an illustrative view showing another separation prevention structure of the joint portion.

FIG. 7 is an illustrative view showing another separation prevention structure of the joint portion.

[Explanation of symbols]

10 ... Sewer branch fitting 12 ... Sewer main 16… Branch pipe 18 ... Saddle section 20 ... Ring 22 ... Joint 50 ... Sewer pipe with branch pipe joint

Front page continued (72) Inventor Takehisa Tanaka 516 Kamino, Sakai City, Osaka Prefecture, Togawa Rubber Co., Ltd. (72) Toshio Nakamoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Co., Ltd. (72) Inventor Sadakazu Goto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Co., Ltd.Vinyl Pipe Factory (72) Inventor, Kasuke Matsushita 64, Ishizukitacho, Sakai City, Osaka Prefecture, Kubota Vinyl Pipe Factory (56) References JP-A-57-124192 (JP, A) JP-A-7-174284 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 41/08

Claims (2)

(57) [Claims] 1. A sewer branch pipe joint for connecting a branch pipe to a branch hole provided in a pipe wall of the sewer main pipe, which is mounted on an outer surface of the sewer main pipe and adapted to the branch hole. A saddle portion having a hole, a rising portion raised from the periphery of the hole to the outer surface side of the saddle portion, made of a hard material, and fitted to an inner peripheral surface of the rising portion.
Fitting part and upper end of the fitting part and the rising part
Ring having a flange disposed on the upper portion, and bullets
Made of a conductive material, mounted on the outer peripheral surface of the rising portion,
Comprising a coupling portion for receiving the lower end of the branch pipe, the lower <br/> end of the branch pipe when the branch pipe is joined to the joint portion is brought into contact with the upper end of the collar, sewerage branch fittings . 2. A pipe main body, a branch hole provided in a pipe wall of the pipe main body, a rising portion which is raised from a peripheral edge of the branch hole to an outer surface side of the pipe main body, and is made of a hard material. Is fitted to the inner surface of the part
Fitting part and upper end of the fitting part and the rising part
Ring having a flange disposed on the upper portion, and bullets
Made of a conductive material, mounted on the outer peripheral surface of the rising portion,
Comprising a coupling portion for receiving the lower end of the branch pipe, the lower <br/> end of the branch pipe when the branch pipe is joined to the joint portion is brought into contact with the upper end of the collar, with the branch fittings Sewer pipe.