| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain the entire strength of a plug body P and improve the mountability of the same. <P>SOLUTION: A bending part 14 is provided between a trunk 12 and a seal protrusion 15 of the plug body P so that the seal protrusion 15 can be flexibly bent inside even if the trunk 12 is fully thick. Even when the plug body P is pushed into a pipe joint 11, the plug body P is not deformed and can be firmly pushed thereinto owing to the trunk 12 having a large thickness. Moreover, in the process of mounting the plug body P on the pipe joint 11, the bending part 14 is flexibly bent inside as shown in Fig.3, so that the seal protrusion 15 can easily pass over an external thread part 11a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
