JPH09229279A - Manhole coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attachment to a manhole side wall and also to improve water stopping performance of an attaching part. SOLUTION: A sleeve pipe 20 is fixed to a hole 14 formed by boring a handle side wall 12 through filling adhesives 18. Even when irregularities are generated on the inner peripheral surface of the hole 14 when the hole 14 is formed, the fitting parts of the hole 14 and the sleeve pipe 20 are accurately sealed by the filling adhesives 18. When force for ending a chloroethylene vinyl pipe 16 is applied, the force is absorbed by the deformation of a rubber joint 22 and a cushioning material 32 arranged between the chloroethylene vinyl pipe 16 and the sleeve pipe 20 and the deformation or breakage of mortar 34, and water stop is held. In attaching of the sleeve pipe 20 to the hole 14, any inner band and any special jig for extending the diameter of it and fixing it is not used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole joint, and more particularly to a manhole joint for connecting a pipe to a manhole in a sewer pipeline, for example.

[0002]

2. Description of the Related Art When a conventional manhole joint 1 of this kind shown in FIG. 5 is attached to a manhole side wall 2 on a side surface of a manhole, first, a large diameter cylindrical rubber 3 is formed in a hole 2a formed by punching the manhole side wall 2. The outer periphery of the portion 3a is fitted. Next, the large diameter portion 3a of the cylindrical rubber 3 corresponding to the fitted portion
The cylindrical rubber 3 is fixed to the hole 2a formed in the side wall 2 of the manhole by mounting the inner band 4a inside and expanding the diameter of the inner band 4a using a jig. The O-ring 4b is connected to the large diameter portion 3a of the cylindrical rubber 3 and the connecting pipe 5.
Is filled in between.

When the other conventional manhole joint 6 shown in FIG. 6 is attached to the hole 2a formed in the side wall 2 of the manhole, the inner surface of the hole 2a and a rubber made of a cylindrical rubber fitted into the inner surface of the hole 2a. The mortar 8 for stopping water is filled between the outer surface of the fitting portion of the joint 7 and the outer surface.

[0004]

In the case of the manhole joint 1 shown in FIG. 5, the hole 2 formed in the side wall 2 of the manhole.
In order to secure the waterproofness of the fitting portion between the a and the large diameter portion 3a of the cylindrical rubber 3, when the hole 2a is bored in the manhole side wall 2, the processing accuracy is required, and the work at the site is difficult. Further, when expanding the diameter of the inner band 4a mounted inside the large diameter portion 3a of the cylindrical rubber 3, a special jig may be required, so that the cylindrical rubber 3 can be attached to the manhole side wall 2. It was difficult.

In the case of the manhole joint 6 shown in FIG. 6, mortar 8 is filled in the fitting portion between the inner surface of the hole 2a formed in the manhole side wall 2 and the outer surface of the rubber joint 7 to join the fitting portion. To do. However, when a bending force is applied to the connecting pipe 9, the mortar 8 is deformed, and the sewage flowing in the manhole from this part may flow to the outside of the manhole side wall 2 and there is a problem that sufficient water shutoff cannot be secured. there were.

Therefore, a main object of the present invention is to provide a manhole joint which can be easily mounted on the side wall of a manhole and which can improve the waterproof property of the mounting portion.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a manhole joint for boring a manhole side wall to connect a connecting pipe, wherein the manhole joint is joined to the hole of the manhole side wall by a filling adhesive and is larger than the pipe diameter of the connecting pipe. A short tube having a pipe diameter, and a flexible cylindrical portion having a large diameter at one end and a small diameter at the other end, one end of the flexible cylindrical portion being connected to the short pipe, and the other end of the flexible cylindrical portion being a short pipe. And a mortar which is connected to a connection pipe inserted into the inside of the flexible cylindrical portion and further includes mortar filled between the connection pipe and the short pipe.

[0008]

The filling system adhesive is filled between the inner surface of the hole on the side wall of the manhole and the outer surface of the short pipe fitted in the hole to bond the short pipe to the hole. Therefore, even when the inner surface of the hole has irregularities when the hole is formed in the side wall of the manhole, the fitting portion between the hole and the short pipe on the side wall of the manhole is reliably sealed by the filling adhesive. Further, when a bending force is applied to the connecting pipe, this force is absorbed by deforming or damaging the mortar filled between the flexible cylindrical portion and the connecting pipe and the short pipe, and the manhole joint Still water is retained.

Further, the connection between the hole on the side wall of the manhole and the short pipe and the connection between the short pipe and the connecting pipe are made by bonding with a filling adhesive and tightening an external band attached to the outside of the flexible cylindrical portion. Done. Therefore, the inner band and a special jig for expanding and fixing the inner band are not required.

[0010]

According to the present invention, the fitting portion between the hole on the side wall of the manhole and the short pipe is reliably sealed by the filling adhesive, and this force can be applied when the bending force is applied to the connecting pipe. It is absorbed by the deformation or breakage of the flexible cylinder and the mortar filled between the connecting pipe and the short pipe, so that the water blocking performance of the mounting portion of the manhole joint can be improved.

Since no special parts or jigs are used for attaching the manhole joint to the manhole side wall and attaching the connecting pipe to the short pipe of the manhole joint,
The manhole joint and connecting pipe can be easily attached to the side wall of the manhole. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A manhole joint 10 of this embodiment shown in FIGS. 1 and 2 is one in which a PVC pipe 16 as a connecting pipe is connected to a hole 14 formed by boring a manhole side wall 12. The sleeve pipe 20 is joined to the hole 14 of the manhole side wall 12 using a filling adhesive 18 and has a diameter larger than that of the PVC pipe 16.

The sleeve pipe 20 is a short pipe having an outer diameter slightly smaller than the diameter of the hole 14 of the manhole side wall 12, an inner diameter larger than the outer diameter of the PVC pipe 16, and a length slightly longer than the thickness of the manhole side wall 12. One end surface 20 of the sleeve tube 20
The sleeve tube 20 is inserted and arranged in the hole 14 of the manhole side wall 12 so that a and the inner wall surface 12a of the manhole side wall 12 are aligned. A space between the inner peripheral surface of the hole 14 of the manhole side wall 12 and the corresponding outer peripheral portion of the sleeve tube 20 is filled with a filling adhesive 18 made of, for example, an epoxy resin, and the sleeve tube 20 has a hole. It is fixed in 14. On the other hand, the other end surface 20b of the sleeve tube 20
Is disposed at a position protruding from the outer wall surface 12b of the manhole side wall 12 by a predetermined length.

The other end surface 2 of the sleeve tube 20 fixed in the hole 14 of the manhole side wall 12 with a filling adhesive 18.
The inner periphery of the large diameter portion 22a of the rubber joint 22 which is a flexible cylindrical portion as shown in FIG. 3A is fitted to the outer periphery on the 0b side. One end of the rubber joint 22 is the sleeve tube 2
A large-diameter portion 22a having an inner diameter substantially equal to the outer circumference of 0 and a small-diameter portion 22b having an inner diameter substantially equal to the outer diameter of the PVC pipe 16 which is the connecting pipe at the other end are formed. A rubber joint 22 fitted to the outer periphery of the sleeve tube 20 on the side of the other end surface 20b
A groove 24a that is continuous in the radial direction is formed substantially at the center of the outer circumference of the large-diameter portion 22a.
Ridges 24b are formed. Then, after fitting the large diameter portion 22a of the rubber joint 22 into the sleeve tube 20, the outer band 26 made of stainless steel is attached to the groove 24a from the outer side of the large diameter portion 22a and tightened, whereby the ridge 2
4b is pressed against the outer circumference of the sleeve tube 20. In this way, the large diameter portion 22a of the rubber joint 22 is fixed to the sleeve tube 20.

The PVC pipe 16 is inserted from a large diameter portion 22a of the rubber joint 22 fixed to the sleeve pipe 20 and is arranged outward from the large diameter portion 22a, and its pipe end is located inside the manhole side wall 12. It is arranged so as to coincide with the wall surface 12a. Also, the small diameter portion 22 of the rubber joint 22.
A groove 28a and a ridge 28b similar to those of the large-diameter portion 22a are formed at substantially central positions on the outer circumference and the inner circumference of b. And
By attaching the external band 30 from the outside to the groove 28a and tightening it, the ridge 28b is pressed against the PVC pipe 16, and the PVC pipe 16 is flexibly fixed to the small diameter portion 22b of the rubber joint 22.

A cushioning material 32 is inserted up to a predetermined position between the outer circumference of the PVC pipe 16 and the inner circumference of the sleeve pipe 20. The cushioning material 32 is made of foamed polyethylene and has a hollow cross-section. The cushioning material 32 has an interval between the outer circumference of the PVC pipe 16 and the inner circumference of the sleeve pipe 20 in a state where the sleeve pipe 20 and the PVC pipe 16 are positioned. It has an outer diameter sufficient to close it. Further, the non-shrink mortar 34 is filled between the PVC pipe 16 and the sleeve pipe 20 up to the inner wall surface 12 a of the manhole side wall 12. In this way, the PVC pipe 16 which is flexible and fixed to the manhole side wall 12 is fixed in a direction substantially perpendicular to the main surface of the manhole side wall 12.

Here, the diameter of the hole 14 formed in the side wall 12 of the manhole is φ314 mm, and the outer diameter of the sleeve tube 20 is φ30.
0 mm, the outer diameter of the PVC pipe 16 is set to φ267 mm, and the outer diameter of the large diameter portion 22a of the rubber joint 22 is set to about φ326 mm. The thickness of the manhole side wall 12 is about 75 mm. The construction process of the manhole joint 10 will be described below with reference to FIG. When constructing the manhole joint 10,
First, at a symmetrical position on the outer periphery of the manhole side wall 12 of the manhole 36, the height of the manhole 36 is slightly different in consideration of the sewage flow.
One hole 14 is formed, and the sleeve tube 20 is inserted into the hole 14 and fixed by using a filling adhesive 18 (FIG. 1).

Next, the pipe end of the PVC pipe 16 is inserted from the small diameter portion 22b of the rubber joint 22, and the pipe end of the PVC pipe 16 is covered with the sleeve pipe 20.
Insert into and position based on the slope corresponding to the sewage flow. After positioning, PVC pipe 16 and sleeve pipe 14
Between the PVC pipe 16 and the sleeve pipe 20 from the outside of the manhole side wall 12 is filled with the mortar 34.

The rubber joint 22 is connected to the PVC pipe 16
On the outer circumference of the rubber joint 22
The tube end of the sleeve tube 20 is inserted into a, the outer band 26 is attached to the groove 24a (FIG. 3) on the outer periphery of the large diameter portion 22a, and the rubber joint 22 is connected to the sleeve 20 by tightening.
Then, the outer band 30 is attached to the groove 28a on the outer periphery of the small diameter portion 22b of the rubber joint 22 and is tightened to connect the rubber joint 22 to the PVC pipe 16.

At the bottom of the manhole 36, there are two holes 1
The invert 38 made of mortar is filled along the lower surface of the inner circumference of the PVC pipe 16 connected to the pipe 4 with a slight inclination in consideration of the flow of the sewage flow. When a force to bend the PVC pipe 16 is applied due to an earthquake or the like, the rubber joint 22 and the cushioning material 32 arranged between the PVC pipe 16 and the sleeve pipe 20 are deformed or the mortar 34 is deformed or damaged. This force is absorbed, and the water blocking property of the manhole joint 10 is maintained.

According to this embodiment, the manhole side wall 12
By filling and bonding the filling adhesive 18 between the hole 14 formed in the above and the sleeve tube 20, the manhole 3
The sewage flow flowing in the inside 6 is prevented from flowing out from the outer circumference of the sleeve pipe 20 to the outside of the manhole side wall 12. Therefore, when the hole 14 is formed in the side wall 12 of the manhole, even if the inner periphery of the hole 14 is uneven, the uneven portion is filled with the filling adhesive 18, and the hole 14 and the sleeve tube 20 are The fitting part of is surely sealed. Further, when a force for bending the PVC pipe 16 is applied, the deformation of the cushioning member 32 arranged between the rubber joint 22 and the PVC pipe 16 and the sleeve pipe 20 and the mortar 34 are performed.
This force is absorbed by the deformation or damage of the. That is, the hole 14 of the manhole side wall 12 and the manhole joint 10
It is possible to improve the water blocking performance of the mounting portion of. Further, when the manhole side wall 12 is bored to form the hole 14, it is not required to have processing accuracy such as roughness of the opening surface, so that it can be installed on site.

Further, when the vinyl chloride pipe 16 is connected to the hole 14 of the manhole side wall 12, since the filling adhesive 18 and the outer bands 26 and 30 are used, the inner band is expanded and fixed as in the conventional case. No such special jig is used. Therefore, it is easy to attach the manhole joint 10 to the hole 14 of the manhole side wall 12. Further, in the above-described embodiment, the case where the linearly tapered portion 22c is formed between the large diameter portion 22a and the small diameter portion 22b of the rubber joint 22 has been shown (FIG. 3 (a)). Instead of, for example, as shown in FIG.
2b may be formed by connecting two bent portions 22d having a semi-circular cross section.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is a plan view of FIG.

FIG. 3 is an illustrative view showing a rubber joint.

FIG. 4 is an illustrative view showing a use state of the embodiment in FIG. 1;

FIG. 5 is an illustrative view showing a conventional technique;

FIG. 6 is an illustrative view showing a conventional technique.

[Explanation of symbols]

 10 ... Manhole joint 12 ... Manhole side wall 14 ... Hole 16 ... PVC pipe 18 ... Filling adhesive 20 ... Sleeve pipe 22 ... Rubber joint 26,30 ... External band 32 ... Cushioning material 36 ... Manhole 38 ... Invert

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Nakamoto 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory Co., Ltd. (72) Kazuhiro Hirao, 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory (72) Inventor Kayosuke Matsushita 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory, Inc. (72) Takao Takagi 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory, Ltd.

Claims (1)

[Claims] 1. A manhole joint for boring a manhole side wall to connect a connecting pipe, wherein the manhole joint is joined to the hole of the manhole side wall by a filling adhesive and has a pipe diameter larger than the pipe diameter of the connecting pipe. And a flexible cylindrical portion having a large diameter at one end and a small diameter at the other end, the one end of the flexible cylindrical portion being connected to the short pipe, and the other end of the flexible cylindrical portion being the short pipe. And a mortar that is connected to the connection pipe inserted through the inside of the flexible cylindrical portion and that is further filled with mortar between the connection pipe and the short pipe.