JP2001208255A - Bending prevention ring and sewer pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent the bending of a pipeline. SOLUTION: When a rubber ring 20 is installed between ribs 18 in the tip side in a spigot 24 and a bending prevention ring 22 is installed between the ribs 18 in the depth side of the rubber ring 20, the outer circumference of the rubber ring 20 is stuck out of the ribs 18 and the outer circumference of the bending prevention ring 22 is stuck out of the ribs 18 at the height equivalent to 1/2 of the difference between the outer diameter of the ribs 18 and the inside diameter of a socket 14. When the spigot 24 is inserted into the socket 14, the spigot 24 is supported in the socket 14 in two parts in the rubber ring 20 and the bending prevention ring 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-bending ring and a sewage pipe, and more particularly to an anti-bending ring and a sewage pipe which can prevent, for example, meandering during construction of the pipe.

[0002]

2. Description of the Related Art In general, in a sewage pipe, it is desirable to pipe the pipe straight at a predetermined gradient in order to prevent sewage from staying in the pipe. .

[0003]

However, as shown in FIG. 7, when the rubber ring joint 1 is used, since the movement of the pipeline 2 is allowed to some extent at the joint, a skilled construction engineer is required. Even with the above skill, it is difficult to lay the pipe 2 straight, and there is a possibility that the pipe 2 may bend at an angle α and meander at each joint. Then, when a gradient (reverse gradient) that rises in the downflow direction due to the meandering of the pipe line 2 occurs, there is a possibility that sewage may accumulate in that portion.

One way to alleviate this problem is to increase the effective length of the pipe to increase the distance between the rubber ring joints. However, as in the case of providing a branch joint in the middle of the pipe, In some cases, it is not possible to increase the distance between the rubber ring joints due to the structure.

[0005] It is, therefore, a primary object of the present invention to provide an anti-bending ring and a sewer line that can more effectively prevent meandering of the line.

[0006]

According to a first aspect of the present invention, there is provided an anti-bending ring mounted between ribs formed on an outer surface of a spigot inserted into a socket, wherein the outer diameter of the rib and the diameter of the socket are determined. An anti-bending ring that has a height that protrudes from the ribs at a height corresponding to the difference between the inner diameter and is formed of a material that is harder than the rubber ring that is compressed between the inner surface of the socket and the outer surface of the spigot is there.

According to a second aspect of the present invention, there is provided a spigot, a spigot inserted into the spigot and having a plurality of circumferential ribs on the outer surface, a rubber ring mounted between the ribs on the distal end side of the spigot, and rubber of the spigot Equipped with a bending prevention ring attached between the ribs on the back side of the ring,
This is a sewer pipe in which the spigot is inserted into the receptacle after the rubber ring and the bending prevention ring are attached to the predetermined positions.

[0008]

[Function] When a rubber ring is attached between the ribs on the front end side of the spigot and a bending prevention ring is attached between the ribs on the back side of the rubber ring, the outer peripheral portion of the rubber ring protrudes from the rib,
The outer peripheral portion of the bending prevention ring protrudes from the rib at a height corresponding to the difference between the outer diameter of the rib and the inner diameter of the receiving port. Therefore, when the spigot is inserted into the socket, the rubber ring is compressed between the outer surface of the spigot and the inner surface of the socket, and the outer peripheral portion of the anti-bending ring, which is harder than the rubber ring, is formed on the inner peripheral surface of the socket. Touch That is, the spigot is supported at the rubber ring and the anti-bending ring in the receiving port, and the anti-bending ring fills the gap between the outer surface of the spigot and the inner surface of the receiving port.

[0009]

According to the present invention, the displacement of the spigot in the receiving port in the radial direction can be suppressed by the anti-bending ring, so that the bending of the pipeline around the rubber ring can be prevented. Therefore, even when the distance between the rubber ring joints is short, meandering of the pipeline can be effectively prevented.

The above objects, 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.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sewage pipe 10 of this embodiment shown in FIG. 1 is a pipe that is straightly laid while maintaining a predetermined downflow gradient in the ground. Be built.

The ribbed tube 12 includes a tubular body 16 having a receiving port 14 at one end, and a plurality of circumferential ribs 18 are formed on the outer surface of the body 16 at intervals from each other over the entire length in the axial direction of the tube. You. The rib 1 on the other end of the main body 16
A rubber ring 20 is mounted between the ribs 8, and a bending prevention ring 22 is mounted between the ribs 18 on the back side of the rubber ring 20.
As a result, the other end of the main body 16 becomes a spigot 24 to be inserted into the socket 14 of the other ribbed tube 12.

The rubber ring 20 is provided between the outer surface of the spigot 24 and the socket 14.
Is compressed between the inner surfaces of the first and second surfaces to seal the gap between the two surfaces. Therefore, the height H1 in the cross section of the rubber ring 20 is, as shown in FIG.
の of the difference (D1−D2) between 1 and the outer diameter D2 of the spigot 24
(H1> (D1-D2) / 2).
It is desirable that the height H1 be set individually for each type of the rubber ring 20 so that an optimum compression ratio can be secured according to the cross-sectional shape of the rubber ring 20 and the like.

The anti-bending ring 22 fills the gap between the outer surface of the spigot 24 and the inner surface of the receptacle 14 so that
As shown in FIG. 2, the ring is formed by a ring having a part missing in the circumferential direction, that is, a C-ring.

The material for forming the bending prevention ring 22 is as follows.
A material harder than the rubber ring 20, for example, a synthetic resin (vinyl chloride, polyacetal, polypropylene, etc.) or a metal (stainless steel, bronze, etc.) is used. If a material softer than the rubber ring 20 is used, the bending prevention ring 22
Is deformed undesirably, so that the spout 2 in the receptacle 14
This is because the movement (bending) of No. 4 cannot be suppressed.

The size of the bending prevention ring 22 is set in accordance with the size of the spigot 24 and the like so that the movement (bending) thereof can be suppressed. For example, the spigot 2 between the ribs 18
4, the height H2 in the cross section of the bending prevention ring 22 is the difference (D1-D2) between the inner diameter D1 of the socket 14 and the outer diameter D2 of the outlet 24, as shown in FIG. 1 /
(H2 ≒ (D1-D2))
/ 2). On the other hand, when a projection or the like is formed on the outer surface of the spigot 24, the height thereof is subtracted to remove the bending prevention ring 22.
Height H2 is set. In any case, the height H2 of the bending prevention ring 22 is determined by the difference between the outer diameter D1 of the receiving port 14 and the outer diameter D3 of the rib 18 (D
It is set so as to protrude from the rib 18 at a height corresponding to 1/2 of 1-D3). If the height H2 is higher than this, the bending prevention ring 22 cannot be inserted into the socket 14, and if it is lower than this, the bending prevention ring 22 cannot be inserted.
There is a gap between the outer surface of
This is because the movement of the person cannot be suppressed.

When the sewage pipe 10 is constructed, first, as shown in FIG. 3, a rubber ring 20 is mounted between the ribs 18 on the distal end side of the spigot 24 from the pipe axis direction. A bending prevention ring 22 is mounted between the ribs 18 on the rear side. When the bending prevention ring 22 is mounted, both ends in the circumferential direction of the bending prevention ring (C ring) 22 are elastically deformed in the radially enlarged direction, and fitted to the outer surface of the spigot 24 from the pipe radial direction or the pipe axial direction. I do. Then, the spigot 24 is inserted into the socket 14. Then, as shown in FIG. 1B, the rubber ring 20 is compressed by the outer surface of the spigot 24 and the inner surface of the receiving port 14, and the outer peripheral surface of the bending prevention ring 22 contacts the inner surface of the receiving port 14. That is, the spigot 24 is supported at two places in the receiving port 14, the rubber ring 20 and the bending prevention ring 22.

Therefore, according to this embodiment, the socket 1
The displacement of the spigot 24 in the radial direction in 4 can be suppressed by the bending prevention ring 22, and the bending (meandering) of the pipeline with the rubber ring 20 as a fulcrum can be prevented. Further, since the bending prevention ring 22 is arranged on the opening side of the receiving port 14 with respect to the rubber ring 20, it is possible to prevent sand and the like from entering the inside of the receiving port 14 by the bending preventing ring 22.

In the above-described embodiment, the height of the bending prevention ring 22 is set to be constant over the entire circumference. However, as shown in FIG. 4, for example, as shown in FIG. A)) or at least one (three in FIG. 4) meat-removing portions 26 may be formed on the outer peripheral portion (FIG. 4B), and the thickness of the bending prevention ring 22 may be partially reduced. In this case, since the bending prevention ring 22 can be more easily deformed, workability at the time of mounting can be improved. In addition, the number and length of the meat stealing part 26 may be appropriately changed.

In place of the bending prevention ring 22, FIG.
An anti-bending ring 28, 30 or 32 as shown in (A), (B) or (C) may be used.

The bending prevention ring 28 (FIG. 5A)
A projection 28a is formed on one side of the split ring, a hole 28b is formed on the other side, and the projection 28a and the hole 28b are fitted to join the two pieces together. Bending prevention ring 30 (FIG. 5)
(B)) shows the first locking portion 30 on one side of the split ring.
a, the second locking portion 30b is formed on the other side, and the first locking portion 30b is formed.
The two pieces are joined by engaging the locking portion 30a and the second locking portion 30b. Then, the bending prevention ring 32 (FIG. 5C) connects the plurality of divided pieces 32a with a wire,
The two ends of the wire 32b are connected after connecting each divided piece 32a to the outer surface of the spigot 24 by connecting them with a wire 32b such as rubber or a string. However, the wire 32b
When a rubber is used, it may be formed in a ring shape in advance. These bending prevention rings 28 to 32 can also effectively prevent bending of the conduit 10 similarly to the above-described bending prevention ring 22.

Further, in the above-described embodiment, the case where the present invention is applied to the sewage pipe 10 constructed by a plurality of ribbed pipes 12 has been described. The present invention can be applied to a sewage pipe 36 having a sewage pipe or any other sewage pipe having a rubber ring joint.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing a sewage pipe according to an embodiment of the present invention;

FIG. 2 is an illustrative view showing a bending prevention ring used in the embodiment of FIG. 1;

FIG. 3 is an illustrative view showing a dimensional relationship of each component of the embodiment in FIG. 1;

FIG. 4 is an illustrative view showing a modified example of the bending prevention ring;

FIG. 5 is an illustrative view showing a modified example of the bending prevention ring;

FIG. 6 is an illustrative view showing a modified example of the sewage pipe;

FIG. 7 is an illustrative view showing a conventional technique;

[Description of Signs] 10 ... sewer pipe line 12 ... ribbed pipe 14 ... receiving port 18 ... rib 20 ... rubber ring 22 ... bending prevention ring 24 ... spout

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Chitoku Fukui 64 Ishizukita-cho, Sakai-shi, Osaka F-term in Kubota Vinyl Pipe Factory (reference) 2D063 BA24 BA26 3H015 BA01 BB04 BC02 BC08

Claims (3)

[Claims] An anti-bending ring mounted between ribs formed on an outer surface of a spigot inserted into a socket, wherein a height corresponding to a difference between an outer diameter of the rib and an inner diameter of the socket. An anti-bending ring having a height protruding from the rib and made of a material harder than a rubber ring compressed between an inner surface of the socket and an outer surface of the spout. 2. A spigot, a spigot inserted into the spigot and having a plurality of circumferential ribs on an outer surface, a rubber ring mounted between ribs on a distal end side of the spigot, and the rubber of the spigot A sewer pipe comprising: a bend prevention ring mounted between ribs on the back side of a ring, wherein the spigot is inserted into the receptacle after the rubber ring and the bend prevention ring are mounted at predetermined positions. 3. The bending prevention ring according to claim 1, wherein the ring is formed by a split ring or a C ring.