| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drainpipe to be buried in foundation, which prevents an inner pipe from excessively protruding from a sheath pipe during operation for connection to an indoor drainpipe. <P>SOLUTION: A drainpipe 1A to be buried in foundation comprises a sheath pipe 2 and an inner pipe 3. An inner pipe-side movement restriction part 34 is arranged on the outer peripheral surface of an upstream-side receiving port member 32 (indoor-side pipe end) of the inner pipe 3, while a sheath pipe-side movement restriction part 21 is arranged on the inner peripheral surface of the sheath pipe 2. When the inner pipe 3 is arranged in the sheath pipe 2, the movement of the inner pipe 3 in outdoor direction is restricted at a position where the inner pipe-side movement restriction part 34 of the inner pipe 3 comes in contact with the sheath pipe-side movement restriction part 21 of the sheath pipe 2. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
