| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a coupling structure, the sealing performance of which is not deteriorated with time, so that leakage can be prevented over a long period of time. <P>SOLUTION: The coupling structure comprises a tubular body 1 comprising a resin material and a connection member 2 and is constituted such that the tubular body 1 is connected to a pipeline 3 while interposing the connection member 2 therebetween. A flange 11, which is projected into the outside of the tubular body in the radial direction, is formed at the connection end of the tubular body 1 to the pipeline 3. The connection member 2 includes: a pressing part 21 for pressing the side face 11A of a flange part on the tubular body side; and an engagement part 22 to be engaged with the connection end of the pipeline. The engagement part of the connection member is engaged with the connection end of the pipeline and the pressing part of the connection member is made to press the side face of the flange part on the tubular body side, so that the tubular body is connected to the pipeline. A convex part 23, which has an acute-angled tip on the cross section of the tubular body in the radial direction, is formed on the pressing surface, which presses the side face of the flange part on the tubular body side, of the pressing part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
