JPH0518479A - Method and structure for branch pipe connection - Google Patents

Abstract

PURPOSE:To enhance the strength of and sealing for a joint part regardless of the wall thickness or the material sort of a main pipe and a branch pipe to be coupled therewith by eliminating such problems as dislocation and small dia. internal flow-path caused by joining. CONSTITUTION:A spherical surface fitting part 12 is formed from a partially spherical recess 8 of a joint and the spherical surface 10 of a connecting tool 4. An exhaust pipe is connected with a main pipe 2 by first applying an adhesive (fixing means) 13 to at least either of the over-surface 2a of the main pipe and the bottom surface (fixation surface) 7a of the joint formed with the same radius of curvature as that of the main pipe over surface 2a, and then securing the joint to the same surface 2a. Adhesive 13 is applied to at least either of the partially spherical recess 8 and the spherical surface 10 part of the connecting tool 4, and the angle of a coupling socket 11 of the connecting tool 4, where the end of the exhaust pipe is connected, is set before the adhesive solidifies through utilization of the abovementioned spherical surface fitting part 12, and fixation is executed. The adhesive used may be a one in high viscosity epoxy resin series of two liquid mixing type.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a branch pipe to a main pipe and its structure.

[0002]

2. Description of the Related Art Conventionally, in order to connect a branch pipe for sewage (branch pipe) connected to each household to a thick main pipe for sewage, a fitting is attached to a main pipe at a portion connecting the branch pipes. It is common practice to connect a branch pipe to the. However, since the joint attached to the main pipe has a constant branching angle, a "deviation" is likely to occur between the branch pipe and the branch pipe connected to it, and when this "deviation" occurs, the branch pipe is connected. There were problems such as being unable to do it.

Further, since the tip end of the branch pipe is externally fitted and connected to the joint, the internal flow path between the branch pipe and the main pipe has a small diameter at the joint portion. Foreign substances tend to accumulate on the surface, which causes "clogging of sewage" at an early stage and has a problem in durability. Therefore, as a solution to these problems, as shown in Japanese Patent Laid-Open No. 56-55241, a boring machine such as a boring machine is used to attach an excavating tool to the tip of a sheath pipe and rotate the excavating tool part from the ground. After making a hole in the pipe and then making a through hole in the main pipe, screw a screw into this through hole and screw the tip of the branch pipe to the screw part to connect the branch pipe directly to the main pipe. By doing so, it has been proposed to prevent problems such as "deviation" and a decrease in the diameter of the internal flow path due to the joint.

[0004]

However, since the main pipe and the branch pipe are connected by screw fitting in the one described in the above publication, for example, the main pipe or the branch pipe connected to the main pipe is connected. When the wall thickness is thin, there is a new problem that the screw fitting portion is reduced and the strength, sealing property and the like are deteriorated.

Particularly, when the material of the main pipe or the branch pipe connected to the main pipe is a relatively soft synthetic resin such as vinyl chloride, such a problem becomes remarkable. The present invention has been proposed in view of the above problems, and it is possible to prevent problems caused by "deviation" and a reduction in the diameter of an internal flow path due to a joint and the like, and to connect the main pipe and the main pipe. An object of the present invention is to provide a branch pipe connection structure and a branch pipe connection method capable of significantly improving the strength and sealing property of a connecting portion regardless of the thickness and material of the branch pipe. Is.

[0006]

In order to achieve the above object, a branch pipe connecting structure in a pipe body of the present invention is a joint member having a fixed surface at one end and an arcuate or spherical joint surface at the other end. And a cylindrical connector having a bottom surface that has an arcuate surface or a spherical contact surface that abuts on the joint surface of the joint member, and the joint member is fixed to the pipe body by a fixing means, and the joint member and the connector are arcuate. The interior space of the connector and the interior space of the pipe body are fixed by fixing means through the surface or spherical joint portion, and a linear flow path is formed between the bottom of the connection implement and the inner peripheral surface of the pipe body. It is characterized by being configured to communicate with and.

And, the branch pipe connecting method in the pipe body is as follows.
After fixing one end of the joint member to the outer peripheral surface of the pipe body by the fixing means, abutting the connecting tool to the other end of the joint member and adjusting the mounting angle at the arc surface or spherical joint, the connecting tool is fixed by the fixing means. It is characterized in that a perforation tool which is fixed and inserted from the upper end of the connection tool is used to form a linear flow path between the arc surface or the spherical joint portion of the connection tool and the inner peripheral surface of the pipe body. To do.

[0008]

First, one end of the joint member is fixed to the outer peripheral surface of the pipe body with an adhesive or the like. Next, an adhesive is applied to either one of the arcuate surface or the spherical joint surface formed on the other end of the joint member and the contact surface of the connector, and the angle is adjusted while the both are in contact. Secure the fitting. After that, the flow path is formed by punching from the upper end of the connecting tool to the inner peripheral surface of the tubular body from the bottom of the connecting tool with a drilling device such as a drill.

The flow path thus formed is a straight flow path having no unevenness between the bottom of the connector and the joint member and between the joint member and the pipe body. After that, when the branch pipe is connected to the connector, the work of connecting the branch pipe to the main pipe is completed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
Is a vertical cross-sectional side view showing a state in which a domestic sewer pipe is connected to a main pipe buried in the ground, and reference numeral 1 in the drawing denotes a branch pipe connecting portion. The branch pipe connecting portion 1 is composed of a joint member 3 whose one end is fixed to the outer peripheral surface portion of the main pipe (tubular body) 2 and a connector 4 which is fixed to the other end of the joint member 3. A drain pipe (branch pipe) 6 from the household 5 is connected to the end portion.

Each of these members 2, 3 and 4 is made of a synthetic resin such as vinyl chloride. As shown in FIG. 2, the joint member 3 has a main body 7 formed into a substantially trapezoidal shape, a bottom surface 7a of the main body 7 formed into a curved surface having the same curvature as the upper surface 2a of the main pipe 2, and a central portion of the upper surface portion. Spherical recess (joint surface) 8
Are formed. Further, as shown in FIG. 3, the connector 4 is formed in a cylindrical shape with a bottom, and the vicinity of the bottom 9 is formed into a spherical surface (joint surface) 10 that fits into the concave portion 8 of the joint member 3 having a partially spherical shape. A connection port 11 to which the end of the drainage pipe 6 is connected is formed in the upper part.

A spherical fitting portion (an arc surface or a spherical joint portion) 12 is formed by the partially spherical concave portion 8 of the joint member 3 and the spherical surface 10 of the connector 4. A procedure for connecting the drainage pipe 6 from the home 5 to the main pipe 2 using the joint member 3 and the connecting tool 4 formed as described above will be described below. First, the upper surface 2 of the main pipe 2 at the portion where the drain pipe 6 is to be connected
A is exposed.

Next, an adhesive (fixing means) 13 is applied to at least one of the bottom surface (fixing surface) 7a of the joint member 3 and the upper surface 2a of the main tube 2 which are formed to have the same curvature as the upper surface 2a of the main tube 2. Then, the joint member 3 is fixed to the upper surface 2a of the main pipe 2. Then, an adhesive (fixing means) 13 is provided on at least one of the partially spherical concave portion 8 of the joint member 3 and the spherical surface 10 portion of the connector 4.
Is applied and the angle of the connection port 11 of the connector 4 to which the end of the drainage pipe 6 is connected is set and fixed while the adhesive 13 is not solidified using the spherical fitting portion 12 (FIG. 4). reference).

At this time, since the main pipe 2, the joint member 3, and the connector 4 are made of a synthetic resin such as vinyl chloride, the adhesive 13 is a two-component mixed high-viscosity epoxy resin adhesive. . Main pipe 2 and joint member 3, joint member 3 and connector 4
When the adhesive 13 between the connection tool 4 and the connection tool 4 is solidified, as shown in FIG. The flow path 16 is formed as shown in FIG. 6 by making a hole from the bottom 9 to the inner peripheral surface 2b of the tubular body 2.

After that, the drainage pipe 6 is attached to the connection port 11 of the connector 4.
When the end portions of the drainage pipes 6 are connected and this portion is backfilled, the work of connecting the drainage pipe 6 to the main pipe 2 is completed. In the above embodiment, the spherical fitting portion 12 is formed by the partially spherical concave portion 8 of the joint member 3 and the spherical surface 10 of the connector 4, but as shown in FIG. Spherical convex part 1
As shown in FIG. 8, it is of course possible to form a concave portion 18 having a partial spherical shape on the bottom portion 9 of the connector 4, and form the spherical fitting portion 12 by these both 17 and 18. .

Further, although the fixing means is made of an adhesive in the above embodiment, the fixing means can be made by friction between members or welding by high frequency instead of this adhesive. Further, in the above embodiment, the arcuate surface or the spherical joint portion is provided with the concave portion 8 having the partial spherical shape of the joint member 3 and the spherical surface 1 of the connector 4.
It is possible to adjust the angle of the connecting port 11 of the connecting tool 4 two-dimensionally by forming it with 0, but if the connecting surface 11 of the connecting tool 4 is changed to a circular surface instead of this spherical surface, the connecting port 11 of the connecting tool 4 swings one-dimensionally. It is only possible to adjust the angle of.

In addition, although the main pipe 2, the joint member 3, the connecting member 4 and the like are made of synthetic resin such as vinyl chloride in the above embodiment, the present invention can be carried out even if the pipe is cast iron or lead pipe. Of course, there are things you can do.

[0018]

As described above, according to the present invention, the abutment surface of the connector is brought into contact with the arcuate surface or spherical joint surface of the joint member fixed to the outer peripheral surface of the pipe body. Since the attachment angle of the connection tool can be adjusted to any angle on the arc surface or spherical part of, even if there is an error in the measurement of the attachment position or an error in the attachment, Absent.

Moreover, there is also an advantage that the connecting work can be easily performed in a short time without requiring skill and the work efficiency can be greatly improved.
In addition, after adjusting the attachment angle of the connection tool to an arbitrary angle, a hole is formed by a drilling device such as a drill to form a flow path from the bottom of the connection tool to the inner peripheral surface of the pipe body. Since this flow path is formed in a straight flow path having no unevenness between the bottom of the connector and the joint member and between the joint member and the pipe body, there is no small-diameter portion in the joint portion as in the conventional case, There is also an advantage that the durability can be remarkably improved by eliminating the clogging due to the reduction of the diameter of the internal flow path.

In addition, since the joint between the main pipe and the joint member and between the joint member and the connecting pipe is fixed on a wide surface, the strength and sealing property at the connecting portion can be maintained regardless of the thickness of each member and the kind of material. There is also an advantage that it can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a state in which a domestic sewer pipe is connected to a main pipe buried in the ground by the method of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a joint member is attached to a main pipe.

FIG. 3 is a partially cutaway front view of the connector.

FIG. 4 is a vertical cross-sectional front view of a state in which a joint member is attached to a main pipe and a connecting tool is fixedly connected to the joint member.

FIG. 5 is a vertical cross-sectional front view when a flow path is formed by a punching device.

FIG. 6 is a vertical cross-sectional front view of a state where a flow path is formed.

FIG. 7 is a view corresponding to FIG. 2 showing a modified example of the joint member.

FIG. 8 is a partially cutaway front view showing a modified example of the connector.

[Explanation of symbols]

2 ... main 2b ... 2 inner peripheral surface 3 ... Joint members 4 ... Connector 7a: Fixed surface 8 ・ 10 ・ ・ ・ Jointed surface 11 ... Channel 12 ... Arc surface or spherical joint 13: Fixing means tool

Claims (2)

[Claims] 1. A cylindrical shape having a joint member having a fixed surface at one end and an arcuate surface or a spherical joint surface at the other end, and a bottom surface having an arcuate surface or a spherical contact surface for contacting the joint surface of the joint member. The joint member is fixed to the pipe body by the fixing means, and the joint member and the joint tool are fixed by the fixing means via the arcuate surface or the spherical joint portion, and the bottom portion of the connector is connected to the pipe body. A branched pipe connection structure for a pipe body, characterized in that a straight flow path is formed between the inner peripheral surface and the internal space of the connector and the internal space of the pipe body communicate with each other. 2. A connecting member is fixed to an outer peripheral surface of a tubular body by a fixing means, a connecting tool is brought into contact with the other end of the connecting member, and its mounting angle is adjusted by an arc surface or a spherical joint portion, and then the connecting member is connected. Fix the tool with fixing means, and use a punching tool inserted from the upper end of the connector to form a linear flow path between the arc surface or the spherical joint of the connector and the inner peripheral surface of the pipe body. A method for connecting a branch pipe of a pipe body characterized by the above.