JPH0378197U

JPH0378197U -

Info

Publication number: JPH0378197U
Application number: JP13964889U
Authority: JP
Priority date: 1989-12-01
Filing date: 1989-12-01
Publication date: 1991-08-07

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例を示す要部縦断面
図、第２図は同じく第２実施例を示す要部縦断面
図、第３図は同じく第３実施例を示す要部縦断面
図、第４図は従来例を示す縦断面図である。１１……内筒、１２……外筒、１３……溝、１
４……穴、２０……電熱線、３０……コネクター
ピン、４０……形状記憶材料、５０……ポリエチ
レン管。 Fig. 1 is a vertical cross-sectional view of the main part showing the first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the main part showing the second embodiment, and Fig. 3 is a longitudinal cross-sectional view of the main part showing the third embodiment. The plan view and FIG. 4 are longitudinal sectional views showing a conventional example. 11...Inner cylinder, 12...Outer cylinder, 13...Groove, 1
4... Hole, 20... Heating wire, 30... Connector pin, 40... Shape memory material, 50... Polyethylene pipe.

Claims

[Claims for Utility Model Registration] 1. A heating element is installed inside the tube socket of a cylindrical body made of thermoplastic synthetic resin, and after the tube is inserted, the inserted joint is melted by the heating action of the heating element. In the pipe joint for connection and connection, an electrophile characterized in that a shape memory material having a diameter shrinkage memory function according to the heat generation temperature of the heating element is installed inside the pipe socket of the cylindrical body on the outside of the heating element installed inside. Eugene joint. 2. Utility Model Registration Claim 1: The shape memory material has a transformation point of 270 to 300°C.
An electrofusion joint consisting of something that reduces in diameter. 3. A pipe joint in which a heating element is installed inside the tube socket of a cylindrical body made of thermoplastic synthetic resin, and after the tube is inserted, the inserted joint is melted and fusion-connected by the heating action of the heating element. An electrofusion joint characterized in that an annular shape memory material having a transformation point that reduces its diameter at approximately 80° C. is attached to the outer circumference of a tube socket of a cylindrical body. 4 Utility Model Registration The electrofusion joint according to claim 3, wherein the shape memory material is a shape memory resin. 5. A pipe joint in which a heating element is installed inside the tube socket of a cylindrical body made of thermoplastic synthetic resin, and after the tube is inserted, the inserted joint is melted and fusion-connected by the heating action of the heating element, as described above. An electrofusion joint characterized in that the heating element is made of a shape memory metal material. 6 Utility Model Registration Claim 5. The electrofusion joint according to claim 5, wherein the shape memory metal material has a transformation point at which the diameter decreases at about 270°C.