| 摘要 |
<p>PURPOSE:To prevent lowering of the seal effect of a gasket, with which a plastic cover in a terminal part is sealed, even when a fluid transport pipe is deformed. CONSTITUTION:A gasket 72 in an X-shape in cross section having a plurality of recessed part 72A-72D is arranged at the periphery of the terminal part 20a of a plastic cover 20 for a fluid transport pipe. When an external pressure is applied on the fluid transport pipe, the external pressure itself is exerted as the bearing of the gasket 72 through a self-seal function provided by means of a plurality of the recessed parts 72A-72C of the gasket 72. Further, seal rings 74A-74C having hardness higher than that of the gasket 72 are arranged in the recessed parts 72A-72C, respectively, and even when an external pressure is exerted, excessive deformation of the gasket 72 is prevented from occurring.</p> |
