| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tube water cut-off structure free of water cut-off performance degradation due to deposits such as pebbles during joining tubes together. <P>SOLUTION: In the water cut-off structure for the tube 1, a water cut-off rubber 7 is annularly arranged along the outer peripheral face of a spigot portion or the inner peripheral face of a socket portion when joining the tubes 1A, 1B together with the socket portion 3 and the spigot portion 4 fitted to each other in muddy water 9. The water cut-off rubber 7 has a water cut-off portion 71 and a wall portion 72 formed on the front end side of the tube 1B therebeyond. It also has a swollen portion 8 formed on the front end side beyond the wall portion with its outer or inner peripheral face exposed. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
