| 摘要 |
PROBLEM TO BE SOLVED: To prevent the crush of a connection pipe during fastening a clamp without worsening die releasing property in resin molding of the connection pipe. SOLUTION: A reinforcing rib 3c is integrally formed on a preset site of the inner peripheral face of a pipe portion 3a, other than a site corresponding to a protruded portion 3b, and the reinforcing rib 3c is not provided on the site corresponding to the protruded portion 3b. Thus, the site on which the protruded portion 3b is formed is easily deformed to be crushed during sliding die release which forms the connection pipe 3 at its outer periphery side, allowing easy sliding die release. Since the reinforcing rib 3c is integrally formed on the preset site of the inner peripheral face of the pipe portion 3a, other than the site corresponding to the protruded portion 3b, the crush of the connection pipe 3 is prevented during fastening the clamp for fixing a pipe. Thus, the crush of the connection pipe is suppressed during fastening the clamp without worsening the die release property during resin molding of the connection pipe 3. COPYRIGHT: (C)2005,JPO&NCIPI
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