| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pipe fitting including an inner cylinder capable of being embodied with no parting line drawn on the peripheral surface of an annular seal fitting groove even if the inner cylinder has such a structure that an annular seal is fitted on a peripheral surface thereof. <P>SOLUTION: The pipe fitting 1 is structured so that the body of the pipe fitting is furnished internally with the inner cylinder 2 to which the end of a connection pipe 8 is inserted, the annular seal fitting groove 21 is formed at the peripheral surface of the inner cylinder 2, and the seal 4 for sealing the gap between the end part inside periphery of the connection pipe 8 and the outer periphery of the inner cylinder 2 is fitted in the seal fitting groove 21, wherein an insert 24 having a flange 23 to form a wall surface 22 closer to the forefront of the seal fitting groove 21 is attached integrally to the forefront portion of the inner cylinder 2, whereby the annular seal fitting groove 21 is formed at the forefront of the inner cylinder 2. <P>COPYRIGHT: (C)2011,JPO&INPIT |
