JP2584917B2 - Receptacle processing method for synthetic resin pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pipe receiving method suitable for use as a vacuum type sewer pipe, water pipe or the like.

[0002]

2. Description of the Related Art Conventionally, synthetic resin pipes such as polyethylene pipes are connected by a connection method described in Japanese Patent Publication No. 61-10715 or a connection method described in Japanese Utility Model Application Laid-Open No. 2-16898.

In the method disclosed in Japanese Patent Publication No. 61-10715, the two pipes are connected by abutting a heat receiving portion of one of the pipes with an insertion port of the other pipe.

The method disclosed in Japanese Utility Model Laid-Open Publication No. 2-16898 discloses a method in which two pipes are inserted into both ends of a joint in which a conductive wire is embedded, and the joint is connected to the joint by energizing the conductive wire. By heat fusing each of the two tubes, 2
One pipe is connected via a joint.

[0005]

[Problems to be solved by the invention] However, Japanese Patent Publication No. 61
The method disclosed in Japanese Patent No. -10715 has complicated connection workability and requires skill. Further, the method disclosed in Japanese Utility Model Laid-Open No. 2-16898 requires expensive joints, complicated connection workability, and requires skill.

As another connection method of the synthetic resin tube, there is a method in which a rubber ring mounting groove is provided in the inner diameter portion of the receiving port of one of the pipes, and the insertion port of the other pipe is inserted into this receiving port. . This rubber ring receiving port structure is easy to process the receiving port, and when connecting the pipes, it is only necessary to insert the insertion port of the other pipe, so that the connection workability is good.

However, when the above-described rubber ring socket structure is adopted for a synthetic resin pipe having a shrink property that shrinks in size after heating and softening a polyethylene pipe or the like, the other side is formed by the dimensional shrinkage after molding the rubber ring socket. There is a problem that the insertion of the pipe cannot be inserted, or there is still dimensional instability after molding the rubber ring socket in anticipation of dimensional contraction,
Not practical.

SUMMARY OF THE INVENTION It is an object of the present invention to form a dimensionally stable rubber ring receiving port in a shrinkable olefin-based synthetic resin pipe, and to provide a receiving port with good workability and connection workability.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method for receiving a synthetic resin pipe made of an olefin resin, in which a synthetic resin cylindrical body having a rubber ring mounting groove on an inner diameter portion is formed in advance. , On the inside diameter of the heat-softened synthetic resin tube,
The tubular body is inserted beyond the length of the tubular body to form a receptacle provided with a rubber ring mounting groove.

[0010]

According to the present invention, the following effects are obtained. Since the inner diameter portion of the rubber ring receiving port provided with the rubber ring mounting groove is formed of a preformed synthetic resin tubular body, the dimensional shrinkage of the olefin-based synthetic resin pipe is provided with the rubber ring mounting groove. A dimensionally stable rubber ring socket can be easily formed without reaching the inner diameter.

Since the synthetic resin tubular body is inserted into the inner diameter portion of the end of the olefin synthetic resin tube beyond the length of the tubular body, the dimensional contraction of the olefin synthetic resin tube after the insertion is reduced. As an effect, the synthetic resin pipe that contracts in size wraps the entire length of the cylindrical body under the action of a high contraction pressure, thereby ensuring the watertightness of the rubber ring receiving port and the prevention of falling off.

When connecting the pipes, it is only necessary to insert the opening of the other pipe into the rubber ring socket, and the connection workability is good.

[0013]

FIG. 1 is a schematic view showing an embodiment of the present invention. The synthetic resin tube 10 is made of an olefin resin such as polyethylene or polypropylene, and has a shrink property.

However, the synthetic resin tube 10 has the following (1) to
By (3), the rubber ring receiving port 11 can be processed.

(1) A rubber ring mounting groove 12 is provided in the inner diameter portion.
A synthetic resin tubular body 13 made of vinyl chloride or the like is molded in advance (see FIG. 1A). At this time, protrusions 14 and 15 that are continuous in the circumferential direction can be provided on the outer diameter portion of the cylindrical body 13.

(2) The tube end of the synthetic resin tube 10 is heated and softened, and the tubular body 13
Is inserted beyond the length L by, for example, a distance α.

(3) By cooling and solidifying the tube end of the synthetic resin tube 10, a rubber ring receiving port 11 in which the cylindrical body 13 is firmly held is formed in the tube end inner diameter portion of the synthetic resin tube 10.

The rubber ring 16 mounted in the rubber ring mounting groove 12 is formed by connecting the cylindrical body 13 of the above (2) to the synthetic resin pipe 10.
It may be installed before it is inserted into the inside diameter of the pipe end,
Alternatively, the cylindrical body 13 of the above (2) may be mounted after being inserted into the inner diameter of the tube end of the synthetic resin tube 10. Also, ridge 1
Reference numerals 4 and 15 may be discontinuous in the circumferential direction.

Next, the operation of the above embodiment will be described. Since the inner diameter portion of the rubber ring receiving port 11 provided with the rubber ring mounting groove 12 is formed of the synthetic resin cylindrical body 13 formed in advance, the dimensional contraction of the olefin-based synthetic resin tube 10 is reduced by the rubber ring mounting. The rubber ring receiving port 11 that is dimensionally stable can be easily formed without reaching the inner diameter portion provided with the groove 12.

Since the synthetic resin tubular body 13 is inserted into the inner diameter portion of the olefin synthetic resin pipe 10 beyond the length of the tubular body 13, the olefin synthetic resin pipe 10 after the insertion is inserted. As an effect of the dimensional shrinkage, the synthetic resin pipe 10 that shrinks in size wraps the entire length of the cylindrical body 13 under the action of high shrinkage pressure, thereby ensuring the watertightness of the rubber ring receiving port 11 and prevention of the rubber ring receiving port 11 from coming off.

The outer diameter portion of the cylindrical body 13 has ridges 14, 1
Since the number 5 is provided, the above-described watertightness and prevention of the dropout can be more reliably achieved.

When connecting the pipe 10, it is only necessary to insert the opening of the other pipe into the rubber ring socket 11, and the connection workability is good.

[0023]

As described above, according to the present invention, a dimensionally stable rubber ring receiving port is formed in an olefin-based synthetic resin pipe having a shrink property, and a receiving port with good workability and connection workability is obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Synthetic resin tube 11 Rubber ring socket 12 Rubber ring mounting groove 13 Cylindrical body

Claims (1)

(57) [Claims] 1. A method for processing a synthetic resin pipe made of an olefin-based resin, wherein a synthetic resin tubular body having a rubber ring mounting groove on an inner diameter portion is previously formed and heated and softened. Inserting the cylindrical body beyond the length of the cylindrical body into the inner diameter of the pipe end to form a socket provided with a rubber ring mounting groove. .