JP2003278961A - Connecting structure of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure of pipes capable of easily connecting pipes without special equipment or material and surely cutting off water. <P>SOLUTION: This connecting structure of pipes is characterized by comprising a male screw part 20 formed on one end with a protruding part 22 on the periphery which abuts on the inside of the male screw part 20, and a female screw part 30 engageable with the male screw part 20, formed on the other end with a socket part 32 which abuts on the outside of the female screw part 30 and contacts the protruding part 22. Connection is made by engaging one pipe with another. The protruding part 22 increases the diameter of the socket part 32 by using force generated by screwing and the socket part 32 decreases the diameter. The increased diameter of the socket part 32 decreases due to elasticity and comes into close contact with the protruding part 22, and likewise, the decreased diameter of the protruding part 22 increases to be close contact with the socket part 32 to surely cut off water. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for pipes used for drainage and the like. More specifically, the pipes can be easily and surely connected to each other without using specific tools or parts. And a water-tight pipe connection structure.

[0002]

2. Description of the Related Art In the fields of rainwater drainage, underdrain drainage, etc., a pipe made of a thermoplastic resin such as a vinyl chloride pipe is mainly used. Such pipes are used while connecting pipes of a predetermined length one after another. For connecting portions between pipes, use a connecting joint member having packing, and tighten by tightening a tightening band from the outer periphery of the joint member. The mainstream method is to connect pipes, for example, Japanese Patent Laid-Open No.
An improved technique such as 001-254883 is disclosed.
In recent years, on the other hand, a method of connecting pipes using heat welding has been disclosed in Japanese Patent Laid-Open No. 8-58200
-152090 and the like. This invention
According to the connection structure of pipes using heat welding, the pipes to be connected can be integrated to make a highly watertight connection. Further, there is also disclosed a pipe connecting structure in which a joint portion is screwed as shown in JP 2001-56076 A and a special joint member is not used for the connecting portion.

[0003]

However, in the structure for connecting pipes by heat welding, parts and equipment for heat welding are required in addition to the pipes to be connected, and a power source must be secured during construction. There is a problem that does not happen. In Japanese Unexamined Patent Publication No. 2001-214994, parts other than the pipe are unnecessary by previously disposing the heating wire required for heat welding at the end of the pipe to be connected, but the power source is not required for the construction. The issue of having to be secured remains unsolved.

The present invention has been made in order to solve the above-mentioned problems, and is a pipe that is simple in connection method, has good watertightness, and does not require any specific component other than the pipe to be connected. It is intended to provide a connection structure of.

[0005]

In order to achieve the above object, the present inventor has formed a protrusion on the outer periphery of one end of a pipe,
By forming a socket part in contact with the protrusion at the other end and connecting the pipes by screwing, the tapered part of the pipe connected to the protrusion on the outer periphery of one end of the pipe to be connected (interpolated) The present invention has been found out that it is possible to secure the watertightness at the connecting portion of the corrugated pipe by forming the valve structure by slidingly contacting the inner circumference with each other.
The present invention has the following configurations. That is, a male screw portion is formed on one end side, a projecting portion is provided on the outer peripheral surface adjacent to the inside of the male screw portion, and the male screw portion and the screw thread are provided on the other end side. A connecting structure for a pipe, which is characterized in that a matable female screw portion is formed, and a socket portion adjacent to the outer side of the female screw portion and abutting on the protrusion is provided. Accordingly, when connecting the pipes to each other, the pipes can be connected without using a connecting component, so that the pipes can be easily connected.

Further, in the connection structure of the pipe, the diameter of the socket portion is formed in a taper shape which gradually expands from the inside of the pipe toward the end portion. This allows
When connecting the pipes, only by screwing the pipes together, the watertightness of the connection portion can be ensured to a higher degree. Further, the projecting portion is a pipe connecting structure in which the tip portion is formed in a rounded shape. As a result, the contact area between the projecting portion and the socket portion can be minimized, so that the frictional force of the pipe is reduced and the rotating force when connecting the pipes is small. Can be reduced. Furthermore, the protrusion is
A pipe connecting structure is characterized in that it is formed in a tapered shape in which the diameter gradually increases inward from the end portion side of the pipe.
Thereby, the watertightness can be improved in proportion to the screwed amount of the pipe.

Further, the pipe connecting structure is characterized in that the inner shape of the pipe main body portion is formed so as to be screwed into the male screw portion. As a result, the manufacturing of the pipe can be simplified and the manufacturing cost of the pipe can be suppressed. Further, the pipe is a corrugated pipe connection structure. As a result, it is possible to significantly reduce the labor and material cost for connecting the corrugated pipe having the unevenness on the outer circumference of the pipe.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of a pipe connecting structure according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the present embodiment, and various modifications may be made without departing from the gist of the invention.
Of course, it is included in the technical scope of the present invention.
FIG. 1 is a front view of a corrugated pipe using a pipe connecting structure according to the present invention. FIG. 2 is a sectional view taken along the line AA of FIG. The corrugated tube 10 is composed of a main body portion 12, a male screw portion 20, a protruding portion 22, a female screw portion 30, and a socket portion 32. The body portion 12 is formed in a corrugated shape, which is formed by alternately connecting two pipe diameters at regular intervals. The cross-sectional shape of the main body portion 12 has a rectangular wave shape in which irregularities alternately appear as shown in FIG. By thus providing the corrugated tube 10 with the irregularities on the outer peripheral surface thereof, the strength of the corrugated tube 10 is improved.

A male screw portion 20 and a female screw portion 30 are formed at both ends of the body portion 12, respectively. Male screw part 20 formed on one end side and female screw part 3 provided on the other end side
0 is formed so as to be screwed. In the present embodiment, the external dimensions of the male screw portion 20 are formed to be slightly smaller than the internal diameter dimension of the main body portion 12, and the internal diameter dimension of the female screw portion 30 is formed to be equal to the internal diameter dimension of the main body portion 12.
The male screw portion 20 and the female screw portion 30 are screwed together.

A projecting portion 22 projecting from the outer diameter of the main body portion 12 is formed on the outer peripheral surface of the main body portion 12 adjacent to the male screw portion 20 slightly inside from one end side of the corrugated tube 10. The protruding portion 22 is the corrugated tube body portion 12.
Is provided around the outer circumference of the corrugated tube 10 and has a predetermined width in the extending direction of the corrugated tube 10. The wider the width of the protruding portion 22 (the length in the extending direction of the corrugated tube 10), the more the watertight effect can be enhanced. However, since there is a problem in the transportation efficiency of the corrugated tube 10, etc., in the present embodiment, The width is one large diameter portion of the main body portion 12. Protrusion 22
Is formed in a tapered shape in which the diameter gradually increases from the male screw portion 20 side toward the inside of the corrugated tube. This makes it possible to increase the sliding contact area when the male screw portion 20 is slidably contacted with the socket portion 32 provided adjacent to the female screw portion 30 to be described later, so that the watertightness can be improved. It is convenient.

At the end opposite to the male screw 20,
The socket portion 32 and the female screw portion 30 are formed. The female screw portion 30 is formed adjacent to the socket portion 32 formed at the end portion so as to be screwed with the male screw portion 20. In the present embodiment, the inner diameter of the body portion 12 and the female screw portion 3
The inner diameter dimension of 0 is made equal. Socket part 32
Is provided adjacent to the female screw portion 30 and is formed in a tapered shape in which the diameter gradually increases from the female screw portion 30 toward the end portion. The extension of the socket portion 32 in the present embodiment is approximately the same as the extension of the male screw portion 20.

Next, a method of connecting the corrugated pipe 10 will be described with reference to the drawings. FIG. 3 is an explanatory diagram showing a method of connecting a corrugated pipe. FIG. 4 is an explanatory cross-sectional view of a connecting portion in a state where the corrugated pipe is connected. As shown in FIG. 3, the corrugated pipe 10 is connected by inserting the male screw portion 20 of the corrugated pipe 10 to be connected from the socket portion 32 of the corrugated pipe 10 to be connected into the female screw portion 30,
Rotate the corrugated pipe 10 to be connected, and
Is screwed into the female screw portion 30.

The male screw portion 20 enters the female screw portion 30, and the protruding portion 22 enters the socket portion 32. Since the protruding portion 22 is formed larger than the outer diameter of the corrugated tube 10, the protruding portion 22 enters the socket portion 32 while contacting the socket portion 32. Socket part 32 is female screw part 3
It is formed in a taper shape in which the diameter gradually increases from the 0 side toward the end of the corrugated tube 10, and the protruding portion 22 has a taper shape in which the diameter gradually increases from the male screw portion 20 side toward the inside of the corrugated tube 10. Since the corrugated pipes 10 and 10 are connected to each other, the connecting portions of the corrugated pipes 10 and 10 are in close contact with each other as shown in FIG. Thereby, the watertightness of the connecting portion can be improved.

When the male screw portion 20 is further inserted into the female screw portion 30, the projecting portion 22 and the socket portion 32 are formed in a tapered shape so as to overlap each other, so that the projecting portion 22 is formed by elasticity of the material of the corrugated tube 10. Becomes a state in which the socket portion 32 is expanded, and the socket portion 32 is abutted more firmly, and the watertight effect is further improved. In this way, the socket portion 32
Since it is preferable that the corrugated tube is easily deformed as appropriate, it is preferable that the corrugated tube 10 is formed with a thickness slightly smaller than that of other portions. Further, the corrugated tube 10 is preferably made of a material having appropriate elasticity such as polyethylene.

The diameter of the corrugated tube 10 according to the present invention is not particularly limited, but the corrugated tube 10 according to the present invention can be connected by the corrugated tube 1
Since it is performed by rotating 0, it is preferable that the pipe diameter is small, and particularly, if the pipe diameter is 300 mm or less, the work labor required for the connection is small and it is still preferable.

As described above, by using the corrugated tube 10 according to the present embodiment, the corrugated tube 10 to be connected to the corrugated tube 10 to be connected does not require any special tool or member. The watertight connection is made possible simply by inserting it and rotating it. Therefore, it is not necessary to use connecting parts as in the conventional case,
Moreover, since it is not necessary to prepare a power source at the construction site, construction efficiency and construction cost can be reduced.

Next, another embodiment will be described. FIG. 5: is explanatory drawing which shows the corrugated pipe in 2nd Embodiment. FIG. 6 is an explanatory diagram of a connecting portion in a state where the corrugated pipe shown in FIG. 5 is connected. The corrugated tube 10 in the present embodiment is characterized in that the main body portion 12 is formed in a spiral corrugation. The shapes of the male screw portion 20 and the socket portion 32 are the same as those in the first embodiment, so the same reference numerals are used and detailed description thereof is omitted.

In the present embodiment, since the inner shape of the main body portion 12 is formed into a spiral corrugation, the spiral corrugation inside the main body portion 12 can be used as it is as the female screw portion 30. Therefore, the male screw portion 20
In other words, it suffices if the spiral waveform of the main body portion 12 is formed to be slightly smaller. In addition, as shown in FIG.
The shape of 2 is formed in a substantially arc shape with the corners removed so that the corrugated tubes 10 can always come into contact with the socket 32 when the corrugated tubes 10 are screwed together. According to this, although the contact area between the projecting portion 22 and the socket portion 32 is reduced as compared with the previous embodiment, the frictional force is reduced, so that the corrugated tube 10 is rotated when the corrugated tube 10 is connected. Since it requires only a small amount of moving force, it is possible to reduce the work labor, which is preferable. The connection method between the corrugated pipes 10 is
Similar to the connection method in the embodiment described above, the male screw portion 20 may be inserted from the socket portion 32 into the body portion 12, and the male screw portion 20 may be screwed into the body portion 12 while being rotated.

In the present embodiment, the corrugated tube 1
Since the shape of 0 can be further simplified, the manufacturing cost of the corrugated tube 10 can be reduced.

The above description has been given in detail based on the embodiments of the present invention, but the present invention is not limited to these embodiments. For example, in the above embodiment, the type of pipe is the corrugated pipe 10, but
Ordinary PVC pipe or polyethylene pipe may be used. Further, in the present embodiment, the linear shape of the pipe is all straight pipes, but it goes without saying that it may be a curved pipe. Further, in the present embodiment, the inside of the corrugated pipe 10 has the same waveform as the outer diameter shape, but if it is flattened, it becomes difficult for dust and the like to collect, and it becomes possible to use it as a sewer pipe. Is preferable because it can be improved.

[0021]

According to the pipe connecting structure of the present invention, the pipes can be connected by simply screwing the pipes into each other. Therefore, the connecting work can be performed without preparing connecting parts or a power source. Therefore, the work of connecting the pipes can be made very easy, and the construction cost of the pipes can be significantly reduced. Also, by forming the socket part and the protruding part in a taper shape, when connecting the pipes, it is possible to secure a high watertightness of the connection portion only by screwing the pipes together, and according to the screwing amount. Since the watertightness can be enhanced, the watertightness can be easily set as required. Further, by using the spiral groove on the inner side of the main body portion as the female screw portion, the effect applied to the pipe can be minimized, and the manufacturing cost of the pipe can be suppressed.

[Brief description of drawings]

FIG. 1 is a front view of a corrugated pipe using a pipe connection structure according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram showing a method of connecting a corrugated pipe.

FIG. 4 is an explanatory cross-sectional view of a connecting portion in a state where corrugated pipes are connected.

FIG. 5 is an explanatory diagram showing a corrugated tube according to a second embodiment.

6 is an explanatory view of a connecting portion in a state where the corrugated pipe shown in FIG. 5 is connected.

[Explanation of symbols]

10 Corrugated tube 12 Corrugated pipe body 20 Male screw part 22 Projection 30 Female thread 32 Socket

Claims (6)

[Claims] 1. A male screw portion is formed on one end side, a projecting portion is provided on an outer peripheral surface adjacent to the inner side of the male screw portion, and the male screw portion is formed on the other end side. A connecting structure for a pipe, wherein a female screw portion that can be screwed into the female screw portion is formed, and a socket portion adjacent to the outer side of the female screw portion and abutting the protrusion is provided. 2. The connecting structure for a pipe according to claim 1, wherein the diameter of the socket portion is formed in a tapered shape in which the diameter gradually increases from the inside of the pipe toward the end portion. 3. The pipe connecting structure according to claim 1, wherein the tip portion of the protrusion has a rounded shape. 4. The pipe connecting structure according to claim 1, wherein the protruding portion is formed in a tapered shape in which the diameter gradually increases inward from the end portion side of the pipe. 5. The inner shape of the tube body portion is formed so as to be screwed with the male screw portion.
4. The pipe connection structure according to any one of items 4 to 4. 6. The pipe connecting structure according to any one of claims 1 to 5, wherein the pipe is a corrugated pipe.