| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tube joint for a drainage riser which is easy to connect with an other piping material comparing with a piping method using a piping joint fitted with flange, moreover, a tube joint for a drainage riser which reduces a mechanical vibration produced in a connection part by a drainage flow down, and a drainage riser using this tube joint for drainage risers. <P>SOLUTION: The tube joint for drainage risers comprises a joint main body having a faucet into which a lower end part of an other piping material forming a drainage riser is inserted from an upper side, and a rubber ring having a main body part having a tube shape and a lip part extending from an inner wall face towards a lower end direction gradually shortening a diameter having a nearly a trumpet shape, and in watertight contact with an outer wall surface of a piping material, and the rubber ring is interposed into the faucet. In this tube joint of drainage risers, a posture support means to support outer wall surfaces of piping materials to keep correct postures forms a drainage riser using a tube joint provided on an upper side than the lip part inside the faucet. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
