JP3194532B2 - 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, a joint device as shown in FIG. 3 is used.
That is, a connection member having a saddle body 3 which is in close contact with the outer peripheral surface of the connected pipe 1 and has a connection port 2 protruding from a central portion, and a reception port 4 which is adhesively fitted to the connection port 2 and has an enlarged diameter. First, the saddle body 3 is brought into close contact with the connected pipe 1 via a bonding agent using the short pipe 5, and is fastened with a wire 6 or the like.
And is branched.

[0003] Alternatively, a method is adopted in which an annular packing body is previously fitted to the connection port 8 of the pipe 1 to be connected, and the outer periphery of the branch pipe 7 is brought into close contact with the packing body for connection and branching. .

[0004]

However, since the above-mentioned conventional branch joint uses a bonding agent to be attached to the pipe 1 to be connected, it takes time for the bonding agent to solidify and the working efficiency is increased. In addition, when the connected pipe 1 is buried in the ground to be fastened with the wire 6 or the like, it is necessary to excavate the entire circumference, and the excavation work and the tightening work are complicated. And have a problem. Also, when the packing body is fitted, there are problems that the branch pipe 7 comes off and the strength of the joint is not sufficient.

Further, in the above-described conventional branch joint, there is no projection on the inner peripheral surface near the connection port 8 of the pipe 1 to be connected. 8
However, there is a problem that it is difficult to insert the branch pipe 7 into the branch pipe 7 through the inside thereof, and it is difficult to clean the inside of the branch pipe 7.

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

[0007]

Means for Solving the Problems] branch connection of a first aspect of the present invention, the opening formed connection port on the side surface of the connecting pipe fitted a fitting portion formed on the outer peripheral portion from the outside A substantially tubular joint body that fits and holds the branch pipe to be branched to the inner peripheral part and locks the end of the branch pipe with a locking step protruding near one end of the inner peripheral part; An elastic locking body attached to one end of the fitting portion on the outer periphery of the joint body, elastically deformed in the inner circumferential direction, and locking the inner peripheral surface of the connected pipe to the other end;
An annular packing body attached to the other end of the fitting portion on the outer peripheral portion of the joint main body and in close contact with a joint between the connected pipe and the joint main body; and the fitting of the outer peripheral portion of the joint main body. An annular spacer attached to the other end side of the joint portion, one end face of which is concavely formed in a curved surface so as to be in close contact with the outer peripheral surface of the connected pipe; and And a presser for pressing the packing body toward one end.

According to a second aspect of the present invention, there is provided a branch joint according to the first aspect, wherein a curved surface portion formed from an inner peripheral portion to one end of a locking step portion of the joint body; And an extension protruding from the inner peripheral surface toward one end.

[0009]

In the branch joint according to the first aspect of the present invention, the vicinity of the periphery of the connection port is clamped by the elastic locking member and the presser via the spacer, and the joint body is securely fixed to the connection port of the connected pipe. Is done. Then, by fitting the branch pipe to the inner peripheral portion of the joint main body, the branch pipe is securely fixed to the joint main body. Therefore, the branch pipe is firmly connected and fixed to the connection port of the pipe to be connected.
At this time, the side surface on the one end side of the spacer is concavely provided in a curved shape so as to be in close contact with the outer peripheral surface of the connected pipe, so that the spacer is stably fixed. Further, the packing body is brought into close contact with the joint between the pipe to be connected and the joint body, and the joint is securely sealed. Furthermore, since the elastic locking body that locks the inner peripheral surface of the connected pipe to the other end side elastically deforms in the inner circumferential direction in a state of contacting the peripheral edge of the connection port, the joint body is connected to the connected pipe. Can be fitted from the outside of the connection port. Then, a branch pipe is attached to the connection port of the connected pipe by an operation from one side of the outer side of the connected pipe.

[0010] In the branch joint according to the second aspect of the invention, in addition to the function of the first aspect, the inner peripheral surface of the joint main body is protruded toward one end side to form an extended portion. When a flexible cleaning tool is inserted into the pipe, the cleaning tool abuts on the extension and bends, so that the cleaning tool can be easily inserted into the branch pipe. Since the curved surface portion is formed from the locking step portion to the one end, the inside of the drain pipe can be easily cleaned without the cleaning tool interfering with the one end of the joint body and being caught. .

[0011]

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 sewerage construction, first, the connection from the sewer main to the public basin is connected and buried and grounded. This is an example in which a branch joint is used in a connection portion between a drain pipe and a public basin in a case where connection work with a basin is performed.

In FIG. 1 and FIG. 2, reference numeral 11 denotes an upright pipe as a connected pipe formed of a pipe formed of a synthetic resin such as polyvinyl chloride, and an opening at the lower end of the upright pipe 11 is not shown. It is connected to the upper opening of the drainage basin to form a public basin, and the opening at the upper end of the upright pipe 11 is raised up to the ground surface and closed by a detachable cleaning lid.

A substantially circular connection port 12 is formed on one side of the upright pipe 11 with a hole saw or the like.

Reference numeral 15 denotes a drain pipe as a branch pipe into which drain water from each household flows. The drain pipe 15 is formed of a pipe formed of a synthetic resin such as polyvinyl chloride, for example. It is connected and fixed to the connection port 12 described above.

The branch joint 21 has a substantially cylindrical joint body 22, an elastic locking member 24 attached to the outer periphery of the joint body 22, a packing body 26, a spacer 28,
And a nut 31 as a presser.

The joint body 22 is integrally formed of a synthetic resin or the like, and is fitted to the connection port 12 at an outer peripheral portion in the vicinity of one end 22a formed to be curved in accordance with the shape of the connection port 12. A curved annular fitting portion 33 to be connected and connected is protruded in the outer peripheral direction. An annular groove 34 into which the elastic locking member 24 is fitted is formed along one end 22a of the fitting portion 33, and a packing body is formed on the other end 22b of the fitting portion 33.
The fitting portion 35 to which the spacer 26 and the spacer 28 are fitted has one end 22
The a side is formed in an annular shape with a concave shape in a curved surface. Further, a nut 31 is further provided on the other end portion 22b side of the fitting portion 35.
Is formed with a threaded portion 37 into which is screwed.

The inner peripheral portion of the joint body 22 is a drain pipe.
15 is formed into a cylindrical surface so as to fit and hold the drain pipe 15, and a locking step for locking the end of the drain pipe 15 near one end 22a of the inner peripheral portion.
41 is annularly projected in the inner circumferential direction by the same dimension as the thickness of the drain pipe 15.

Further, from the upper part to the side part of the inner peripheral surface from the locking step part 41 to the one end part 22a of the joint body 22,
A curved surface portion 43 is formed so as to smoothly continue from the inner peripheral surface of the drain pipe 15 to one end portion 22a.
A lower portion of the inner peripheral portion of the second member protrudes toward the one end portion 22a to form an extended portion. In addition, the extension portion 44 may have a larger projecting dimension in the width direction, and may have a substantially semicircular cross section at a lower portion of the inner peripheral portion of the joint body 22.

The elastic locking member 24 is made of an elastic synthetic resin or metal and has a cutout 25 shown in FIG.
The annular concave groove of the joint body 22 is formed in a substantially C shape having
It is attached in a state fitted to 34. This elastic locking body
24 has a substantially rectangular cross section, and an outer peripheral surface is formed as an inclined portion 24a inclined toward the one end portion 22a. Normally, the inclined portion 24a and a part of the side surface 24b on the other end portion 22b side are formed by elastic force. Projecting to the outer periphery of the joint body 22, this side surface 24b
Thus, the peripheral portion of the connection port 12 on the inner peripheral surface of the upright pipe 11 is locked to the other end portion 22b side.

The annular packing body 26 is made of elastic rubber or the like having a rectangular cross section, and the inner peripheral surface thereof is formed on the joint body 22.
And the side surface 26 on the one end 22a side.
a is brought into close contact with the other end 22b side of the joint portion between the upright pipe 11 and the fitting portion 33 of the joint main body 22, and the joint portion is sealed.

The annular spacer 28 is integrally formed of a synthetic resin or the like. The side surface 28a on the one end 22a side is concavely formed in a curved shape so as to be in close contact with the outer peripheral surface of the upright tube 11. A packing body housing portion 29 is formed by recessing the vicinity of the inner peripheral portion in a stepped manner. The side surface 28b of the spacer 28 on the other end 22b side is formed in a planar shape.

The nut 31 has a substantially cylindrical shape made of a synthetic resin or the like, and has a threaded portion 31a which is screwed into the threaded portion 37 of the joint body 22 on the inner periphery, and a plurality of threads on the outer periphery. Each of the holding portions 31b is protruded. Then, the gripper 31b
The nut 31 is rotated using a screw, and the threaded portion 31a is screwed into the threaded portion 37 of the joint main body 22.
At (c), the spacer 28 and the packing body 26 are pressed to the one end 22a side through the spacer 28 to be brought into close contact therewith.

Instead of forming the threaded portion 37 in the joint body 22 and using the nut 31 to be screwed to the threaded portion 37, another holding tool may be used. It is also possible to use an engagement nut which is formed by forming a projection and engaging with the engagement projection.

When the branch joint 21 is attached, first, the elastic locking member 24 is fitted into the annular groove 34, and the packing body 26 and the spacer 28 are fitted into the fitting portion 35.
A joint body 22 to which the nut 31 is loosely screwed and attached is prepared.

Then, the joint body 22 is fitted into the connection port 12 formed in one side of the upright pipe 11 from outside by a hole saw or the like.

Then, the peripheral edge of the connection port 12 comes into contact with the inclined portion 24a of the elastic locking member 24, and the elastic locking member 24 is elastically moved in the inner circumferential direction while reducing the notch 25 against the urging force. Deform.

Then, the joint main body 22 is further fitted, the peripheral portion of the connection port 12 passes through the elastic locking member 24, and the peripheral portion of the connection port 12 is fitted to the fitting portion 33 of the upright pipe 11. , Elastic locking body
24 protrudes in the outer peripheral direction by its own urging force, and the other end 22
The inner peripheral surface of the upright tube 11 is locked to the other end 22b by the side surface 24b on the b side.

By tightening the nut 31 in this state, the side surface 24b of the elastic locking member 24 and the side surface 28a on the one end 22a side of the spacer 28 clamp the vicinity of the peripheral edge of the connection port 12, thereby forming the branch joint 21. Can be fixed to the connection port 12 of the upright pipe 11. Further, by tightening the nut 31, the packing body 26 can be simultaneously brought into close contact with the joint portion between the upright pipe 11 and the joint body 22 via the spacer 28, and the joint portion can be sealed.

Then, a drain pipe 15 is fitted into the inner peripheral part of the joint body 22 from the outside, and the end of the drain pipe 15 is engaged with a locking step.
Glue and fix with 41 locked.

In this way, the drain pipe 15 can be connected and fixed to the connection port 12 of the upright pipe 11 via the branch joint 21.

Incidentally, each joint portion by fitting or the like can be more reliably connected by applying and filling an adhesive or a joining agent as necessary.

As described above, in the branch joint 21 of this embodiment, by tightening the nut 31, the vicinity of the periphery of the connection port 12 is clamped between the side surface 24b of the elastic locking member 24 and the side surface 28a on the one end 22a side of the spacer 28. Then, the drainage pipe 15 is fixed to the connection port 12 of the upright pipe 11 and is fitted to the inner peripheral portion to fix the drainage pipe 15.
Can be firmly fixed to the connection port 12 of the upright pipe 11.
At this time, the side surface 28a on the one end 22a side of the spacer 28 is
Since it is concavely formed in a curved shape so as to be in close contact with the outer peripheral surface of the upright pipe 11, the entire circumference can be fixed stably.

Further, by tightening the nut 31, the packing body 26 is brought into close contact with the joint between the upright pipe 11 and the joint body 22 via the spacer 28, and this joint can be securely sealed. Leakage, intrusion water, etc. can be prevented.

Further, the elastic locking member 24 for locking the inner peripheral surface of the upright pipe 11 to the other end 22b side is elastically deformed in the inner peripheral direction in a state of contacting the peripheral edge of the connection port 12. The joint body 22 can be fitted from outside the connection port 12 of the upright pipe 11. Therefore, the drainage pipe 15 can be easily attached to the connection port 12 of the upright pipe 11 by working from one side of the outer side of the upright pipe 11. Therefore, work from the inner part of the upright pipe 11 becomes unnecessary, and the work efficiency of the installation can be improved.When this branch joint 21 is mounted on the upright pipe 11 already buried in the ground, for example, In addition, it is only necessary to excavate one side instead of the entire circumference of the upright pipe 11, so that the mounting work efficiency can be improved.

The lower part of the inner peripheral surface of the joint main body 22 has one end 22.
Since the extension portion 44 is formed so as to protrude toward the a side, for example, with a cleaning lid (not shown) removed, a flexible cleaning tool (not shown) is directed downward from the upper opening of the upright tube 11. When the cleaning tool is inserted, the cleaning tool comes into contact with the upper surface of the extension portion 44 and bends, so that the cleaning tool can be easily inserted into the drain pipe 15. Since the curved surface portion 43 is formed from the locking step portion 41 to the one end portion 22a and smoothly continues from the inner peripheral surface of the drain pipe 15, the above-mentioned cleaning tool can be connected to the one end portion 22 of the joint main body 22.
The inside of the drain pipe 15 can be easily cleaned without being caught by interference with a.

[0037]

According to the branch joint of the present invention, the vicinity of the peripheral edge of the connection port is clamped by the elastic locking member and the presser via the spacer, and the joint body is connected to the connection port of the pipe to be connected. Can be securely fixed. Then, by fitting the branch pipe to the inner peripheral portion of the joint main body, the branch pipe can be securely fixed to the joint main body. Therefore, the branch pipe can be firmly fixed to the connection port of the pipe to be connected. At this time, the side surface on one end side of the spacer is concavely formed in a curved shape so as to be in close contact with the outer peripheral surface of the connected pipe, so that the entire circumference can be fixed stably. In addition, the holding member allows the packing body to be in close contact with the joint between the pipe to be connected and the joint body, and this joint can be securely sealed, thereby preventing water leakage, intrusion water, etc. from the joint. . further,
The elastic locking body that locks the inner peripheral surface of the connected pipe to the other end side,
Since the joint main body is elastically deformed in the inner circumferential direction in a state of being in contact with the peripheral portion of the connection port, the joint body can be fitted from outside the connection port of the connected pipe. Therefore, the branch pipe can be easily attached to the connection port of the connected pipe by working from one side of the outer side of the connected pipe. Therefore, work from the inside of the connected pipe becomes unnecessary, and the work efficiency of the mounting can be improved.When this branch joint is mounted on a connected pipe already buried in the ground, for example, It is only necessary to excavate one side rather than the entire circumference of the connected pipe, and the work efficiency of mounting can be improved.

According to the branch joint of the second aspect of the invention,
In addition to the effect of claim 1, since the inner peripheral surface of the joint main body is protruded toward one end and formed with an extended portion, when a flexible cleaning tool is inserted into the connected pipe, the cleaning tool is It can be easily inserted into the branch pipe by bending when it comes into contact with the extension. Since the curved surface portion is formed from the locking step portion to the one end, the inside of the drain pipe can be easily cleaned without the cleaning tool interfering with the one end of the joint body and being caught. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a branch joint of the present invention.

FIG. 2 is a top view showing the branch joint.

FIG. 3 is a sectional view showing a conventional branch joint.

[Explanation of symbols]

 11 Upright pipe as connected pipe 12 Connection port 15 Drain pipe as branch pipe 21 Branch joint 22 Joint body 22a One end 22b Other end 24 Elastic locking body 26 Packing body 28 Spacer 31 Nut as holding tool 33 Fitting part 41 Locking step 43 Curved surface 44 Extension

Continuation of the front page (56) References JP-A-55-132485 (JP, A) JP-A-3-12088 (JP, U) JP-A-3-73791 (JP, U) JP-A-3-25096 (JP) , U) (58) Fields studied (Int. Cl. ⁷ , DB name) F16L 41/00-41/08 E03F 3/04

Claims (2)

(57) [Claims] To 1. A opening forming access port on the side surface of the connecting pipe fitted a fitting portion formed on the outer peripheral portion from the outside, and the fitting holding the branch pipe which is branched into an inner peripheral portion, A substantially cylindrical joint body that locks the end of the branch pipe with a locking step protruding near one end of the inner peripheral part; one end side of the fitting part on the outer peripheral part of the joint main body; And an elastic locking member that is elastically deformed in the inner circumferential direction and locks the inner circumferential surface of the connected pipe to the other end, and the other end of the fitting portion on the outer circumferential portion of the joint body. And an annular packing body attached to a joint portion between the connected pipe and the joint body, and an annular packing body attached to the other end side of the fitting portion on an outer peripheral portion of the joint body, and one end face is An annular spacer concavely formed in a curved surface so as to be in close contact with the outer peripheral surface of the connected pipe; and Branch connection, characterized by comprising a pressing member for pressing the one end side fine said packing body. 2. The branch joint according to claim 1, wherein a curved surface portion formed from an inner peripheral portion to one end portion of the locking step portion of the joint main body, and a projecting portion from the inner peripheral surface of the joint main body to one end side. A branch joint comprising: an extension portion provided.