JP2863345B2 - Branch fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch joint for connecting and branching a branch pipe to a connection opening formed in a side face of a pipe to be connected.

[0002]

2. Description of the Related Art Conventionally, for example, when a connection port is formed in a side portion of an upright pipe to be connected made of a vinyl chloride resin and a branch pipe such as another drain pipe is connected to this connection port to branch off. ,
For example, as shown in FIG. 4, a saddle body 3 having a shape closely contacting the outer peripheral surface of the connected pipe 1 and having a connection port 2 protruding from a central portion, and is fitted and fitted to the connection port 2 to expand the diameter. First, the saddle body 3 is brought into close contact with the connected pipe 1 via a bonding agent, is fastened with a wire 6 or the like, and then the branch pipe 7 is bonded to the receiving port 4. Mated. Alternatively, a method is adopted in which an annular packing body is fitted to the connection port of the pipe 1 to be connected in advance, and the outer periphery of the branch pipe 7 is brought into close contact with the packing body to connect and branch.

[0003]

However, when the above-mentioned conventional branch joint is tightly joined to a connection port formed on the side surface of the pipe 1 to be connected, the connection port is simply formed with a circular hole. Therefore, the upper and lower surfaces of the connection port are flush with the inner surface of the connected pipe 1.

When the inside of the branch pipe 7 is clogged,
Remove the lid attached to the upper end of the connected pipe 1 with a flexible cleaning tool, insert it into the connected pipe 1, and connect the branch pipe 7 through the connection port.
However, since the upper and lower surfaces of the connection port are flush with each other as described above, the operation of inserting the cleaning tool is difficult, and the cleaning of the inside of the branch pipe 7 is very difficult. Have the problem of being difficult. Also, when the packing body is fitted, there is a problem that the strength of the joint is not sufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can easily and surely connect a branch pipe to a connection port formed in a side surface of a connected pipe, thereby improving work efficiency.
An object of the present invention is to provide a branch joint that can easily clean the inside of a branch pipe.

[0006]

In the branch joint according to the present invention, an outer peripheral portion is fitted to a connection opening formed in a side surface portion of a connected pipe, and a branch pipe to be branched is fitted and held to an inner peripheral portion. A substantially cylindrical joint body, a curved flange portion projecting from the vicinity of one end of the outer peripheral surface of the joint body in the outer peripheral direction, and curved corresponding to the outer peripheral surface of the connected pipe; A locking step protruding from the vicinity of one end of the inner peripheral surface of the inner peripheral surface in the inner circumferential direction to lock the branch pipe; and a curved surface formed from the inner peripheral part of the locking step to one end of the joint body. And an extension protruding from the inner peripheral surface of the joint body to one end side.

[0007]

In the branch joint according to the present invention, the outer peripheral portion of the joint main body is fitted into the connection port, and a curved surface curved from the vicinity of one end of the outer peripheral surface of the joint main body to correspond to the outer peripheral surface of the connected pipe. Is protruded, so that the joint body is positioned and closely attached to the connected pipe from the outside. Then, the branch pipe is fitted and held on the inner peripheral part of the joint main body, and the branch pipe is locked by a locking step protruding from the vicinity of one end of the inner peripheral surface of the joint main body. Fixed to the tube. In addition, since a curved surface portion is formed from the inner peripheral portion of the locking step portion to the flange portion, and an extended portion is protruded from the inner peripheral surface of the joint body to one end side, flexible cleaning is performed on the connected pipe. When the cleaning tool is inserted, the cleaning tool is inserted into the branch pipe in a state where the cleaning tool abuts on the extension and is bent, so that the inside of the branch pipe is easily cleaned without the end of the joint body interfering with the cleaning tool. .

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a branch joint according to an embodiment of the present invention;

In the present embodiment, at the time of sewage construction, the sewage main pipe and the public basin are connected and buried and installed, and then the drainage pipe from the house and the like is sequentially connected with the construction of the house and the like in each residential land. This is an example of using a branch joint at the connection between the drainage pipe and the public basin when performing the connection work with the basin.First, piping from the sewer main to the public basin,
The installation work will be described.

In FIG. 2, reference numeral 21 denotes a sewer main pipe buried deep underground. An inflow opening is formed in a pipe wall above a side portion of the sewer main pipe 21, and a downstream of a mounting pipe 24 installed at an inclination. The side is connected to this inlet. Further, an attachment pipe 26 is further connected to the upstream side of the attachment pipe 24 via a pipe joint 25 or a universal pipe joint as necessary, and an O-ring 27 is provided upstream of the attachment pipe 26 as necessary. The outlet 32 of the public basin 31 is connected via a pipe joint 28 having a joint or the like or a universal pipe joint.

The public basin 31 comprises a curved pipe 33 opened upward and downward, and an upright pipe 35 connected to an upper opening of the curved pipe 33 as a connected pipe.

The curved tube 33 is formed integrally with a synthetic resin such as polyvinyl chloride, for example.
For example, it is bent at about 75 degrees in accordance with the gradient of 26.
The lower opening of the curved pipe 33, which is the outlet 32 of the public basin 31, is a spigot, and is fitted and connected to the upstream side of the mounting pipe 26 via a pipe joint 28. In the vicinity, an enlarged diameter portion 38 is formed as a receiving port, and the lower opening of the upright pipe 35 is fitted and connected to the enlarged diameter portion 38. An annular groove is formed on the inner peripheral surface of the enlarged diameter portion 38, and an elastic ring such as a rubber ring is fitted in the annular groove. The lower portion is further enlarged in diameter so that the upright pipe 35 fitted and connected slightly swings in the horizontal direction.

The outlet 32 of the curved pipe 33 and the mounting pipe 26
The use of a universal pipe joint whose angle can be adjusted as necessary for the connection portion with the above makes it easier to adjust the angle at the installation site.

The upright pipe 35 is made of a pipe integrally formed of, for example, a synthetic resin such as polyvinyl chloride, and its lower opening is fitted and connected to the upper enlarged diameter section 38 of the curved pipe 33.
The upper opening is closed by a lid 43 detachably fitted through a lid receiver.

Then, in this state, the public basin 31 and the like are buried, and the piping and installation work from the sewer main pipe 21 to the public basin 31 are completed as shown in FIG.

Next, with reference to FIG. 1 and FIG. 3, a description will be given of a work process in which a house or the like is built in each residential land and the drain pipe 51 of each house is connected to the public basin 31.

First, the periphery of the upright pipe 35 is excavated in accordance with the depth position of the drain pipe 51 serving as a branch pipe provided near the public basin 31 to expose the side surface (pipe wall) of the upright pipe 35. .

Then, an inflow port 53 as a substantially circular connection port is formed in a side portion of the upright pipe 35 with a hole saw or the like in accordance with the position of the drain pipe 51.

Then, the drain pipe 51 is connected and fixed to the inflow port 53 via the branch joint 55.

As shown in FIG. 1, the branch joint 55 has a substantially cylindrical joint main body 56 and an outer peripheral surface of the upright pipe 35 which protrudes from the vicinity of one end of the outer peripheral surface of the joint main body 56 in an outer peripheral direction. A curved flange portion 58 which is curved so as to be in close contact with each other is integrally formed.

The inner peripheral surface of the joint body 56 is
The outer peripheral portion of the drain pipe 51 is formed to have a shape that fits and holds the outer peripheral portion of the drain pipe 51. The protrusions are formed to have substantially the same dimensions.

An extension 62 projects from the lower part of the inner peripheral surface of the joint body 56 to one end, but the other part of the joint body 56 has a length that does not protrude into the drain pipe 51. ing.
In addition, the extension 62 may have a larger projecting dimension in the width direction, and may have a substantially semicircular cross section at the lower portion of the inner peripheral surface of the joint main body 56.

Further, the joint main body 56 extends from the inner peripheral portion of the locking step 61.
A curved surface portion 64 is formed over the upper end of the inner end of the vertical pipe 35, and smoothly continues from the inner peripheral surface of the upright pipe 35 to the inner peripheral surface of the drain pipe 51.

On the inner surface of the flange portion 58, an annular groove 70 is formed so as to surround the joint body 56.
An elastic ring 71 such as an O-ring is fitted to 70.

When the branch joint 55 is mounted, an adhesive or a bonding agent is applied to the inner surface of the flange 58, and the joint main body 56 is positioned with the curved surface 64 on the upper side and the extension 62 on the lower side. So that one end is inserted into the inflow port 53,
With the inner surface of the flange portion 58 and the outer peripheral surface of the upright tube 35 in close contact with each other, the outer surface of the flange portion 58 and the outer peripheral surface of the upright tube 35 are integrally fastened with a wire 73 or the like, and a branch joint is formed. 55 upright tube
Attach to 35. A drain pipe 51 is provided on the inner periphery of the joint body 56.
Can be connected to connect the inflow port 53 of the upright pipe 35 and the drain pipe 51.

A drain pipe is provided on the inner peripheral surface of the joint body 56.
After fitting and fixing 51, the surroundings are backfilled with earth and sand, and the step of connecting the drain pipe 51 of each house to the public basin 31 is completed as shown in FIG.

Thus, according to the branch joint 55 of the present embodiment, the outer peripheral portion of the joint main body 56 is fitted into the inflow port 53 of the upright pipe 35, and from the vicinity of one end of the outer peripheral surface of the joint main body 56, Upright pipe
Since a curved flange portion 58 that is curved so as to be in close contact with the outer peripheral surface of the projection 35 is protruded, the joint body 56 is connected to the upright pipe 35.
Position can be easily brought into close contact from outside. Therefore, the installation work is easy, especially the drain pipe
51 is buried at a deep position, and the workability of mounting is improved when work from the inside of the upright pipe 35 is difficult.

Then, the drain pipe 51 is fitted and held on the inner peripheral portion of the joint main body 56, and the drain pipe 51 is locked by a locking step 61 projecting from the vicinity of one end of the inner peripheral surface of the joint main body 56. Therefore, the joint body 56 can be easily and reliably fixed to the drain pipe 51.

A curved surface portion 64 is formed from the inner peripheral portion to the inner end portion of the locking step portion 61, and the drainage pipe is formed from the inner peripheral surface of the upright pipe 35.
51 is smoothly continuous over the inner peripheral surface, and furthermore, an extending portion 62 protrudes from the inner peripheral surface of the joint main body 56 to the inner end side, so that the joint body 56 stands upright with the lid 43 removed. tube
When a flexible cleaning tool (not shown) is inserted downward from the upper opening of 35, the cleaning tool is easily inserted into the drain pipe 51 in a state where the cleaning tool abuts on the extension 62 and is bent, The inside of the drain pipe 51 can be easily cleaned without the part 64 interfering with the cleaning tool and being caught.

Each connection portion by fitting or the like can be more reliably connected by applying and filling an adhesive or a bonding agent as necessary.

Further, the upper opening of the curved tube 33 is merely a port, and a general and inexpensive elbow tube can be used.

[0032]

According to the branch joint of the present invention, the outer peripheral portion of the joint main body is fitted into the connection port of the connected pipe, and from one end of the outer peripheral surface of the joint main body to the outer peripheral surface of the connected pipe. Since the correspondingly curved curved flange portion is protruded, the joint main body can be easily positioned and closely attached to the connected pipe from the outside. Then, the branch pipe is fitted and held on the inner peripheral portion of the joint main body, and the branch pipe is locked by a locking step protruding from the vicinity of one end of the inner peripheral surface of the joint main body. It can be easily and securely fixed to the pipe. In addition, since a curved surface portion is formed from the inner peripheral portion of the locking step portion to the flange portion, and an extended portion is protruded from the inner peripheral surface of the joint body to one end side, flexible cleaning is performed on the connected pipe. When the tool is inserted, the cleaning tool is inserted into the inside of the branch pipe in a state where the cleaning tool abuts on the extension portion and is bent, so that the inside of the branch pipe can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a branch joint according to the present invention.

FIG. 2 is a work process diagram showing one construction example of the above branch joint.

FIG. 3 is a front view showing one construction example of the branch joint.

FIG. 4 is a sectional view showing an example of a conventional branch joint.

[Explanation of symbols]

 35 Upright pipe as connected pipe 51 Drain pipe as branch pipe 53 Inlet as connection port 55 Branch joint 56 Joint body 58 Flange 61 Locking step 62 Extension 64 Curved surface

Claims (1)

(57) [Claims] 1. A substantially cylindrical joint body for fitting an outer peripheral portion to a connection port formed in a side surface portion of a connected pipe and fitting and holding a branch pipe to be branched to an inner peripheral portion; A curved flange protruding in the outer peripheral direction from near one end of the outer peripheral surface of the joint body and curved in accordance with the outer peripheral surface of the connected pipe; and an inner periphery from near one end of the inner peripheral surface of the joint body. A locking step protruding in a direction to lock the branch pipe; a curved surface formed from an inner peripheral portion of the locking step to one end of the joint body; and one end from an inner peripheral surface of the joint body. A branch joint comprising an extension protruding toward the side.