JPH11182765A - Connecting structure of underground buried pipe to connecting part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily/quickly connect an underground buried pipe by arranging a slide joint having on one end the first fitting part fittable to/insertable into the undergound buried pipe and having on the other end the second fitting part slidingly fittable to/insertable into the connecting part in a connecting structure of the undergound buried pipe to the connecting part. SOLUTION: An underground buried pipe 2 is connected through a slide joint 5 to a bell-mouth 3 buried in the concrete part 6 fittable to the opening part formed on a side wall of the connecting part. This slide joint 5 has one end the first fittting part 7 having a diameter larger than the underground buried pipe 2, and has on the other end the second fitting part 8 having a diameter smaller than the bell-mouth 3. When the first fitting part 7 is fitted around the end part of the underground buried pipe 2, the underground buried pipe 2 and the first fitting part 7 are sealed/fixed by a seal member 9 and a fixing member 10. When the second fitting part 8 is fitted in the bell-mouth 3, a seal member 14 seals a part between the second fitting part 8 and the bell-mouth 3 by being brought into pressure contact with the outside surface of the second fitting part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of an underground pipe to a connection for connecting an underground pipe to a connection part such as a handhole or a manhole.

[0002]

2. Description of the Related Art As a structure for connecting an underground pipe to the above-mentioned connecting portion, for example, the structure shown in FIG. 5 has been proposed. In this method, a male joint 30 is provided at the tip of the underground pipe 2, and a female joint 31 to which the joint 30 can be fitted is connected to the outer end of the bell mouth 3 which forms a connecting portion. The underground pipe 2 is connected to the connection portion by fitting the two joint portions 30 and 31 to the connection portion.
Reference numeral 6 shown in the figure is a concrete part for fixing and holding the bell mouth 3, and the bell mouth 3 and the concrete part 6 constitute a bell mouth block 4.

According to the above-mentioned means, since a fitting margin for fitting the two joint portions 30 and 31 is required, an end of one joint portion 30 is opposed to an end of the other joint portion 31 opposed thereto. The underground pipe 2 having the length of the length that has entered the other joint portion 31 side from the portion corresponding to the fitting allowance is prepared (see the solid line in FIG. 2). The joint 30 of the underground pipe 2 is connected to a bellmouth 3
When the underground pipe 2 is bent, the tip of the joint 30 is positioned in front of the joint 31 of the bell mouth 3 when the underground pipe 2 is bent.
Of the joint part 30 of the bell mouth 3 into the joint part 31 of the bell mouth 3,
The two joint portions 30, 31 are fitted together (FIG. 5).
2).

By the way, most underground pipes 2 which are buried underground are excellent in diameter keeping performance so that they are not easily deformed. , 31 requires a large bending force to bend the underground pipe 2 to fit the two joints 3.
Not only is the work of fitting 0, 31 difficult to perform, but also the underground pipe 2 cannot withstand the large bending force, causing damage such as cracking of the underground pipe 2. there were.

When the underground pipe 2 fitted to the joint 31 of the bell mouth 3 is short, for example, the fitting is shallow,
If it is long, the underground pipe 2 will be in a slightly bent state, and there will be a problem that it will be difficult to conduct the wire after fitting. There was a design disadvantage that had to be set well.

[0006]

SUMMARY OF THE INVENTION In view of the above situation, the present invention aims to solve the problem by connecting an underground pipe to a connecting portion easily and quickly without damaging the underground pipe. It is another object of the present invention to provide a connection structure of an underground pipe to a connection part which can perform the above operation and can absorb a dimensional error of the underground pipe.

[0007]

In order to solve the above-mentioned problems, the present invention relates to a connection structure of an underground pipe to a connection part such as a handhole or a manhole, which is inserted into the underground pipe. A first joint part capable of being provided at one end, and a slide joint having a second fitting part slidably fitted into the connection part at the other end. Connection structure for underground pipes. When connecting the underground pipe to the connection part, first, the second fitting part of the slide joint is fitted into the connection part. Next, after setting the underground pipe, the slide joint is slid toward the underground pipe, and the first fitting portion of the slide joint is inserted into the underground pipe to complete the connection.

[0008] The first fitting portion is externally fitted to an end of the underground pipe, and with the external fitting, sealing and fixing between the underground pipe and the first fitting portion are performed, respectively. The first fitting portion is provided with a sealing member and a fixing member for performing the second fitting portion, and the second fitting portion is fitted inside the connecting portion, and the second fitting portion is fitted with the second fitting portion.
By providing the connecting portion with a seal member that is pressed against the outer surface of the fitting portion, the sealing process can be completed only by fitting the slide joint in the connecting portion, and the slide joint can be grounded. The sealing process and the fixing process of both can be completed only by sliding the slide joint to the underground pipe by sliding it toward the underground pipe.

In the vicinity of the maximum sliding position of the slide joint, a stopper member for preventing the slide joint from sliding further is provided. The stopper member can reliably prevent the slide joint from largely moving and coming off the connection portion.

[0010]

FIG. 1 shows a connection structure of an underground pipe 2 to a connection portion 1. In the figure, an opening 1A is formed in a side wall of a connection portion 1 such as a handhole or a manhole, and a bell having a plurality of bellmouths 3 (only one is shown in the figure) is provided in the opening 1A in the horizontal direction. Mouse block 4
, And the underground pipes 2 are connected to these bellmouths 3 via slide joints 5 described later.

The bellmouth block 4 includes the plurality of bellmouths 3 and a concrete portion 6 for integrating the bellmouths 3 at predetermined intervals in the horizontal direction. Then, the concrete portion 6 is fitted into the opening 1A and fixed by mortar or the like. Thus, the bell mouth block 4 is connected to the opening 1A.
A large number of bell mouths 3 can be quickly provided at the connection part 1 by using a method of fixing the bell mouths 3 to the connection part 1 one by one.

As shown in FIG. 3, the slide joint 5 has a first diameter larger than that of the underground pipe 2.
A fitting portion 7 is provided at one end, and the bell mouth 3 is provided at the other end.
A second fitting portion 8 having a smaller diameter than the second fitting portion 8 is provided.
A ring for sealing and fixing the underground pipe 2 and the first fitting part 7 by fitting the first fitting part 7 to the end of the underground pipe 2. The sealing member 9 and the ring-shaped fixing member 10 are attached to the first fitting portion 7.
In preparation for. Two circumferential grooves 11 and 12 in which the seal member 9 is formed on the inner surface of the first fitting portion 7 along the pipe axis direction.
The fixing member 10 is inserted into the remaining circumferential groove 11 while the fixing member 10 is inserted into the circumferential groove 12 located on the back side. Therefore, the first
When the fitting portion 7 is externally fitted to the end of the underground pipe 2, the seal member 9 is pressed against the outer surface of the end of the underground pipe 2 to seal them, and the fixing member 10 is fixed to the underground pipe 2. The underground pipe 2 and the first fitting portion 7 are fitted into the circumferential groove 13 formed on the outer surface of the end.
Is fixed, and the connection is completed. By fitting the second fitting portion 8 inside the bell mouth 3, the same sealing member 14 as the sealing member 9 pressed against the outer surface of the second fitting portion 8 is formed on the inner surface of the bell mouth 3. Two circumferential grooves 2
0A and 20B are inserted into the circumferential groove 20B located on the back side. Therefore, when the second fitting portion 8 is fitted inside the bell mouth 3, the seal member 14 presses the outer surface of the second fitting portion 8 to seal between the second fitting portion 8 and the bell mouth 3. Like that.

The slide joint 5 of the underground pipe 2
At the side end, a fitting portion 16 that is fitted inside the first fitting portion 7 of the slide joint 5 and an integral connection with the fitting portion 16 are provided.
Further, a joint portion including a screw portion 17 that can be screwed and fixed to the underground pipe 2 is provided. The shape of the joint may be different from that shown in the drawings, or may be implemented by integrally forming the joint with the underground pipe 2.

The bell mouth 3 comprises a wrapper portion 19 having a tip portion extending outward and a joint portion 20 connected to the wrapper portion 19, and the one end formed at the end of the joint portion 20. The seal member 1 is inserted into the circumferential groove 20B.
4 is provided.

The case where the underground pipe 2 is connected to the connection part 1 will be described. First, as shown in FIG. The setting is completed when the slide joint 5 cannot slide. Next, as shown in FIG. 2B, the slide joint 5 is externally fitted by sliding the slide joint 5 on the connection portion 18 side of the installed underground pipe 2. At this time, as described above, the slide joint 5 is slid until the fixing member 10 of the slide joint 5 is fitted into the circumferential groove 13 of the fitting portion 16, and the slide joint 5 and the underground pipe 2 are connected. (See FIG. 2C). As described above, when connecting the underground pipe 2 to the connection portion 1, that is, the bell mouth 3, no adhesive or the like is used at all, so that it is not necessary to consider the drying time of the adhesive in the construction time. However, there is an advantage that the construction period can be shortened accordingly.

In the above-described embodiment, no means for preventing the slide joint 5 from being removed from the bell mouth 3 is provided.
As shown in FIGS. 4A and 4B, a plurality of claws 21 are provided at the tip of the slide joint 5, and the slide joint 5 is brought into contact with the upper and lower surfaces 21A of the rear ends of the claws 21. A ring-shaped stopper member 22 is inserted into a peripheral groove 20B formed in the bell mouth 3 to prevent the stopper from coming off.

[0017]

According to the first aspect, by using a slide joint to connect the underground pipe to the connection portion,
Unlike the conventional method, it is not necessary to forcibly bend the underground pipe, and it is possible to reliably prevent the underground pipe from being damaged, and to easily and quickly perform connection work, and Can also be reduced. In addition, there is no need to accurately manufacture the dimensions of the underground pipe connected to the connection portion, which is advantageous in terms of manufacturing.
In addition, there is an advantage that the slide joint can absorb a change in length due to vibration caused by uneven settlement or earthquake.

According to the second aspect of the present invention, the sealing process of the two can be completed only by fitting the slide joint in the connection portion. The sealing process and the fixing process of both can be completed only by externally fitting to the underground pipe, and the connection operation can be performed more quickly and easily.

According to the third aspect of the present invention, by providing the stopper member for preventing the slide joint from sliding further, the slide joint can be connected when used, for example, in a place where an earthquake or undue settlement frequently occurs. It can be reliably prevented from falling out of the part by the stopper member, and it is possible to prevent water or the like from entering the inside of the underground pipe for a long time.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing a state where an underground pipe is connected to a connection portion via a slide joint.

FIG. 2A is a partially sectional side view showing a state immediately before connecting a slide joint to a bell mouth;
(B) is a partial cross-sectional side view showing the state immediately before moving the slide joint to the underground pipe, (c)
FIG. 2 is a side sectional view partially showing a state in which a slide joint is connected to an underground pipe.

FIG. 3 is a longitudinal sectional side view showing a connection structure of a connection portion, a slide joint, and an underground pipe.

FIG. 4 shows another form of the slide joint, and FIG.
FIG. 3 is a side sectional view showing a state immediately before connecting a slide joint to a bell mouth, and FIG. 4B is a side sectional view showing a part showing a state where the slide joint is connected to a bell mouth.

FIG. 5 is a partially sectional side view showing a conventional example of connecting an underground pipe to a connection portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Connection part 1A opening part 2 Underground pipe 3 Bell mouth 4 Bell mouth block 5 Slide joint 6 Concrete part 7 First fitting part 8 First fitting part 9 Seal member 10 Fixing member 11, 12, 13 Peripheral groove 14 Seal member 16 Fitting part 17 Screw part 19 Wrapper part 20 Joint part 20A, 20B Peripheral groove 21 Claw 21A Upper and lower surfaces 22 Stopper member 30 Male joint part 31 Female joint part

Claims (3)

[Claims] 1. A connection structure of an underground pipe to a connection part such as a handhole or a manhole, comprising a first fitting part which can be inserted into the underground pipe at one end, and the other end. And a connection joint having a second fitting portion slidably fitted into the connection portion. 2. The underground pipe and the first fitting portion are fitted externally to an end of the underground pipe.
The first fitting portion is provided with a seal member and a fixing member for performing sealing and fixing with the fitting portion, respectively.
2. The connecting part according to claim 1, wherein the fitting part is fitted inside the connecting part, and the connecting part is provided with a seal member pressed against the outer surface of the second fitting part with the inside fitting. Connection structure of underground pipes to underground. 3. The underground pipe according to claim 1, wherein a stopper member is provided near the maximum sliding position of the slide joint to prevent the slide joint from sliding further. Connection structure.