| 摘要 |
PURPOSE: To quickly connect pipes so as to maintain airtightness and to facilitate the removal of a pipe by integrally molding a tubular extension part with a coupling, forming a tubular groove to which the end part of the pipe is fitted, and arranging one or more sealing part on its outside wall. CONSTITUTION: A pipe 4 provided with a diameter matching a hole 5 in a coupling 1 is inserted from a flow-in port 9 of the hole 5 and pushed inward until it reaches a locking part 6 forming a stopping part and stopped. The pipe 4 becomes invisible when it reaches the locking part 6 so that an operator can visually check the inserting action. When the pipe 4 passes through a stopper 11, the stopper 11 is returned to an original position by its elasticity, so that an inner end of an area 12d of a ring 12 is brought into contact with the outside surface of the pipe 4. According to a shift toward the locking part 6, the pipe 4 is brought into contact with two sealing parts 7, and the pipe 4 can pass through a ring type part in the sealing part 7 because a thin part 7a is provided with flexibility. On the other hand, sealing contact can be secured between the sealing part and the pipe 4. When the pipe 4 reaches the locking part 6, its positioning is finished.
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