JP3445945B2 - Pipe fitting and pipe connection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connector for connecting a corrugated pipe having a corrugated outer peripheral portion and a branch pipe branched from the corrugated pipe.

[0002]

2. Description of the Related Art Corrugated pipes having a corrugated outer peripheral portion are often used as buried pipes buried in the ground and used for drainage and the like. A branch pipe is often connected and used for such a corrugated pipe. 6 and 7 show a pipe connector for connecting a branch pipe to a corrugated pipe. The corrugated tube 9 shown here is
It is an independent mountain type in which the corrugations formed on the outer peripheral portion are independently formed. 10 is a pipe connector. The pipe connector 10 is inserted into a connection hole 13 formed in the outer peripheral portion of the corrugated pipe 9 and connected so as to branch from the corrugated pipe 9. The pipe connector 10 is made of rubber.

A flange portion 12 protruding outward is formed at the tip of the pipe connector 10 on the corrugated pipe 9 side.
The flange portion 12 is formed in a shape following the inner wall surface of the corrugated tube 9 so that it can be brought into close contact with the inner wall surface of the corrugated tube 9. By forming the flange portion 12 on the pipe connector 10, the pipe connector 10
Is connected to the corrugated pipe 9, the flange portion 12 closely contacts the inner wall surface of the corrugated pipe 9, and the pipe connector 10
The corrugated tube 9 is prevented from coming off. The inner diameter of the connection hole 13 formed in the corrugated pipe 9 is naturally smaller than the outer diameter of the flange portion 12. Therefore, when inserting the pipe connector 10 into the connection hole 13,
Since the pipe connector 10 is made of rubber, the flange portion 12 can be deformed, and the flange portion 12 can be deformed to be inserted into the connection hole 13.

[0004]

As described above, the pipe connector is provided with a flange portion for preventing the pipe connector from coming off from the connection hole of the corrugated pipe. However, when the pipe connecting tool that connects the corrugated pipe and the branch pipe is embedded in the soil, there is a problem that the pipe connecting device may be pushed down by the earth pressure and slip into the corrugated pipe.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to connect a corrugated pipe embedded in soil with a branch pipe by a earth pressure to push down a corrugated pipe connector. It is an object to provide a pipe connector that does not slip into the pipe.

[0006]

The present invention has the following constitution in order to achieve the above object. That is, according to the pipe connector of the present invention, it is formed of an elastically deformable material, and one end of the pipe connector can be inserted into a connection hole formed in a corrugated pipe having a corrugated outer peripheral portion. Along with
A tubular portion formed in a tubular shape to which a branch pipe can be directly or indirectly connected to the other end portion side, and the corrugated pipe formed to project outward at one end portion of the tubular portion. The corrugated pipe of the tubular portion and the flange portion as a retaining member that is inserted into the connection hole of
At a position corresponding to the corrugated groove portion, a portion protruding outwardly and facing the outer peripheral portion of the corrugated pipe is provided with a protrusion portion capable of abutting around the connection hole. By adopting this configuration, the pipe connector is connected to the corrugated pipe and embedded in the soil, and even if it is likely to be pushed down into the corrugated pipe due to earth pressure, the protrusion contacts the outer peripheral portion of the corrugated pipe. Therefore, it can be prevented from slipping into the corrugated tube. Also, the above
Position the protrusion so that it corresponds to the corrugated groove of the corrugated pipe.
Position, the protrusion is fixed in the corrugated groove.
And the corrugated tube connector to eliminate the misalignment of the tube connector.
The adhesion with the tube can be improved and the sealing performance can be improved.
It

[0007] is et al., Of the protrusions, part of the opposite side of the contacting portion in the corrugated tube and is formed in a tapered shape inclined in a direction approaching to the corrugated pipe the outer peripheral portion toward the outward , When the protrusion and the flange are both deformed and one side is inserted into the connection hole of the corrugated pipe and then the protrusion is pulled out of the corrugated pipe, the tapered portion of the protrusion gradually expands the connection hole. Therefore, it becomes easy to pull out the protrusion to the outside. As a pipe connection structure, one end of the tubular portion of the pipe connector according to claim 1 or 2 is provided in a connection hole formed in a corrugated pipe having a corrugated outer peripheral portion. While being inserted, the flange portion comes into contact with the inner wall surface of the corrugated pipe, the projection portion comes into contact with the outer peripheral portion of the corrugated pipe, and the branch pipe is directly or indirectly connected to the other end of the tubular portion. It may be characterized by comprising. According to this structure, the pipe connector can be prevented from slipping into the corrugated pipe, and the branch pipe and the corrugated pipe can be satisfactorily connected.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First, FIGS. 1 and 2 show a front view and a side view of the pipe connector. Further, FIGS. 3 and 4 show a state in which the pipe connector shown in FIGS. 1 and 2 is connected to a corrugated pipe of which the waveform is an independent mountain type. The pipe connector 30 has a cylindrical shape, and is integrally formed of rubber as an example of an elastically deformable elastic body. The pipe connector 30 is formed on a cylindrical portion 31 formed in a cylindrical shape, a protrusion 32 protruding outward from the cylindrical portion 31, and an end portion of the tubular portion 31 of the pipe connector 30 on one side. The flange portion 36 and the edge portion 37 formed at the other end of the tubular portion 31 of the pipe connector 30 are formed.

In this embodiment, the projection 32 is formed by the pipe connector 3
It is provided at four places around the 0-shaped tubular portion 31. The position where the protrusion 32 is provided is a position corresponding to the inside of the corrugated groove 42 of the corrugated tube 40 to be connected, as shown in FIG. Therefore, as in the present embodiment, when the corrugated tube 40 has the shape of an independent mountain instead of the spiral shape, the protrusion 32 is projected in a direction orthogonal to the longitudinal direction of the corrugated tube 40. Is formed in. Since such a protruding portion 32 is provided so as to project outward from the cylindrical portion 31, even when the pipe connector 30 is pressed in the direction of the corrugated pipe 40 by earth pressure or the like, the protruding portion 32 is formed.
Is abutted against the outer peripheral surface of the corrugated pipe 40, so that the pipe connector 30 can be prevented from slipping into the corrugated pipe 40.

One side of the tubular portion 31 of the pipe connector 30 is the side inserted into the corrugated pipe 40. 1 to 4, this one side is shown as a lower side. Flange part 3
6 is formed to have a diameter larger than the tubular shape of the tubular portion 31 so as to project outward at one end of the tubular portion 31.
This is a retainer for preventing the pipe connector 30 from coming off the corrugated pipe 40. Therefore, the flange portion 36 is formed to have a larger diameter than the inner diameter of the connection hole 41 formed in the corrugated pipe 40. When the pipe connector 30 is connected to the corrugated pipe 40, the other surface 40a of the flange portion 36 (the upper surface in FIGS. 1 to 4).
Adheres to the inner wall surface of the corrugated pipe 40. For this reason, the flange portion 36 is connected to the corrugated pipe 40 of the pipe connector 30.
It not only functions as a seal for preventing water from leaking from the connection hole 41, but also as a seal portion for preventing leakage of water and the like from the connection hole 41. Therefore, the shape of the flange portion 36 is so-called saddle so that the arc is located above when viewed from the front of FIG. 1 and the arc is located below when viewed from the side of FIG. It is formed into a shape.

The edge portion 37 formed on the other end of the tubular portion 31 of the pipe connector 30 is formed to secure the strength of the other end. Particularly, since a branch pipe described later or a socket (FIG. 5) provided between the branch pipe and the branch pipe, which will be described later, is connected to the other end of the tubular portion 31, it is required to secure a considerable strength.

Further, on the surface (upper surface in the figure) on the other side of the corrugated tube 40 of the projection 32, a tapered surface 32a is formed so that the projection 32 gradually becomes smaller in diameter toward the other side.
Are formed. By forming the other surface of the protrusion 32 on the tapered surface 32a in this way, the following effects are obtained. That is, when connecting the pipe connector 30 as described above to the corrugated pipe 40, the connection hole 41
Since the flange portion 36 having a larger diameter than that must be inserted into the connection hole 41, the pipe connector 30 is deformed by being crushed from the outside toward the center of the circle, and the flange portion 36 is connected to the connection hole 4
It is necessary to insert the insertion portion 34 into the connection hole 41 so that the insertion portion 34 can be inserted into the connection hole 41.

In this case, if the protrusion 32 is provided in the vicinity of the flange 36, it is troublesome and difficult to deform only the flange 36. Therefore, not only the flange 36 but also the protrusion 36 is deformed. It is conceivable that 32 is also deformed and inserted into the connection hole 41. Then, after insertion, it is necessary to reverse the deformation and pull out the protrusion 32 from the connection hole 41.
It is possible to solve the problem that is difficult to pull out due to being caught in the connection hole 41. That is, the other surface of the protrusion 32 is formed into the tapered surface 32a that gradually descends toward one side and is inclined, so that when the protrusion 32 is pulled out from the connection hole 41, the tapered surface 32a is connected. Since the end surface of the hole 41 can be deformed so as to gradually increase the diameter, the protrusion 32 can be easily pulled out from the connection hole 41.

In the above-mentioned example, the corrugated pipe has the independent peak type. However, the shape of the corrugated pipe is not limited to the independent mountain type, and it is suitable to apply the corrugated pipe having a corrugated spiral shape. However, in such a case, as described above, by aligning the position of the protrusion with the corrugated groove formed in a spiral shape, the protrusion is fixed and the displacement of the pipe connector is eliminated, so that the pipe connector and the corrugate are eliminated. Adhesion with the pipe can be improved.

Further, in order to connect a branch pipe (not shown) to the pipe connector, it may be carried out through a socket as shown in FIG. The socket 34 is entirely made of synthetic resin or the like. One side of the socket 34 is an insertion portion 35 that is inserted into the pipe connector 30, and has an outer diameter that is substantially the same as the inner diameter of the pipe connector 30. At a predetermined portion of the insertion portion 35, a fitting portion 39 that can be fitted to the retaining portion 37 formed on the inner wall of the pipe connector 30 is formed. The other side of the socket 34 is formed with a connecting portion 45 having an inner diameter into which a branch pipe can be inserted. That is, the socket 34
By changing the diameter of the connecting portion 45, it is possible to satisfactorily connect the branch pipe having any diameter, regardless of the inner diameter of the pipe connecting tool 30, to the pipe connecting tool 30.
As a retainer between the socket 34 and the pipe connector 30, a tightening means 44 for tightening the socket 34 inserted together with the pipe connector 30 may be provided at the other end of the pipe connector 30. Good.

When connecting the branch pipe to the pipe connector 30, the pipe connector 3 is connected via the socket 34 as described above.
In addition to connecting to 0, it may be directly inserted into the other side of the pipe connector 30 without passing through the socket 34. In such a case, it is necessary to match the outer diameter of the branch pipe with the inner diameter of the pipe connector, and the retaining structure, tightening means, etc. shown in FIG. Will be needed between.

Although the present invention has been variously described with reference to the preferred embodiments, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

[0018]

According to the pipe connector of the present invention, one end portion is formed into a connection hole formed in a corrugated pipe whose outer peripheral portion is corrugated. A tubular part that is insertable and can be connected to a branch pipe directly or indirectly to the other end, and a tubular part that is formed in a tubular shape and that projects outwardly at one end of the tubular part. Is inserted into the connection hole of the corrugated pipe in a deformed state,
The flange part as a stopper and the cylindrical part are connected
Te position smell corresponding to the groove portion of the waveform of the corrugated tube, and protrudes outward, the portion facing the outer peripheral portion of the corrugated tube is provided with a contact capable of protruding portions around the connection hole, the tube connecting device Even if it is connected to the corrugated pipe and buried in the soil and it is likely to be pushed down into the corrugated pipe due to earth pressure, the protrusion will contact the outer periphery of the corrugated pipe, so do not slip into the corrugated pipe. You can Well
Also, place the protrusions at the positions corresponding to the corrugated corrugated grooves.
Since it is installed in the corrugated groove, the protrusion is fixed in the corrugated groove.
By removing the gap of the connecting tool,
The adhesion can be improved and the sealing property can be improved. Furthermore, since the part of the protrusion that is opposite to the part that contacts the corrugated pipe is tapered so that it approaches the outer periphery of the corrugated pipe as it goes outward, both the protrusion and the flange are deformed. When the protrusion is pulled out of the corrugated pipe after inserting one side into the connection hole of the corrugated pipe, the tapered part of the protrusion gradually expands the connection hole, so it is easy to pull out the protrusion to the outside. Become.
As a pipe connecting structure, one end of the tubular portion of the pipe connecting device according to claim 1 or 2 is inserted into a connecting hole formed in a corrugated pipe having a corrugated outer peripheral portion. While the flange portion abuts the inner wall surface of the corrugated pipe, the protrusion abuts the outer peripheral portion of the corrugated pipe, and the branch pipe is directly or indirectly connected to the other end of the tubular portion. The pipe connector can be prevented from slipping into the corrugated pipe, and the branch pipe and the corrugated pipe can be satisfactorily connected.

[Brief description of drawings]

FIG. 1 is a front view of a pipe connector according to the present invention.

FIG. 2 is a side view of the pipe connector shown in FIG.

FIG. 3 is a plan view showing a state where the pipe connector shown in FIG. 1 is connected to a corrugated pipe.

FIG. 4 is a partial cross-sectional view showing the corrugated tube shown in FIG. 3 taken along the line AA ′.

FIG. 5 is a partial cross-sectional view showing a state where a socket for fitting a branch pipe is attached to the pipe connector.

FIG. 6 is a side view showing a conventional pipe connector connected to a corrugated pipe.

FIG. 7 is a partial cross-sectional view showing the corrugated tube shown in FIG. 6 taken along the line BB ′.

[Explanation of symbols]

30 pipe fittings 31 tubular part 32 protrusion 34 socket 36 Flange 37 Edge 40 corrugated pipe 41 Connection hole 42 groove 44 Tightening means 45 connection

Claims (3)

(57) [Claims] 1. An elastically deformable material, one end of which can be inserted into a connection hole formed in a corrugated pipe having a corrugated outer peripheral portion, and the other end side. A tubular portion which is directly or indirectly connectable to the branch pipe and is formed in a tubular shape, and is formed to project outward at one end of the tubular portion and is transformed into a connection hole of the corrugated pipe. In the corrugated groove part of the corrugated pipe to be connected of the flange part, which is inserted in the state of
At a corresponding position, the pipe connecting tool is characterized in that it has a protrusion projecting outward and a portion facing the outer peripheral portion of the corrugated pipe is capable of abutting around the connection hole. 2. The abutment of the protrusion on the corrugated pipe
The part on the opposite side of the
Formed in a taper shape that inclines toward the outer circumference of the heat pipe
The pipe connector according to claim 1, wherein the pipe connector is provided . 3. The pipe connector according to claim 1 or 2.
One end of the cylindrical portion of the outer peripheral portion is formed in a corrugated shape.
Is inserted into a connection hole formed in the corrugated pipe, and the flange portion comes into contact with the inner wall surface of the corrugated pipe.
On the other hand, the protrusion contacts the outer peripheral portion of the corrugated pipe, and the branch pipe is directly or indirectly attached to the other end of the tubular portion.
A pipe connection structure characterized by being connected.