| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pipe joint of hardly slipping out a resin collar after press-in, by restraining the occurrence of a crack, when assembling the resin collar. <P>SOLUTION: A joint base body 12 of this pipe joint is provided with a connecting pipe part 42, a nut part 44, a base body cylinder part 14 extended from an end surface of the nut part 44, and an inner cylinder 22 extended from an end surface 18 of the base body cylinder part 14. The resin collar 30 is arranged on the outer periphery of the base body cylinder part 14 and the inner cylinder 22, and an annular space for inserting a pipe member 26 is formed between the inner cylinder 22 and itself. The resin collar 30 has a press-in part 32 in an end part, and a projection part 16 is projected in the base body cylinder part 14. An inner diameter of the press-in part 32 and an outer diameter of the projection part are set within a range of 4-8% in a press-in margin P calculated by the following expression, and are pressed in by going over the projection part 16 after expanding the resin collar by an expansion process. P=ä(A-B)/B}×100(%), here, A: the outer diameter (mm) of the projection part formed in the base body cylinder part, and B: the inner diameter (mm) of the press-in part of the resin collar. <P>COPYRIGHT: (C)2013,JPO&INPIT |
