| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a down-pipe joint suitable for drain of rainwater in a down-pipe. <P>SOLUTION: A down-pipe joint 1A comprises a cylindrical body 10 which connects an upper down-pipe 2a to a lower down-pipe 2b. The cylindrical body 10 comprises a jut member 12 which juts inward from the inner wall surface of the cylindrical body 10 with an opening to reduce the inner sectional area of the cylindrical body 10 around the axis L1 of the cylindrical body 10, and allows for elastic deformation and elastic return corresponding to the amount of rainwater flowing therein. <P>COPYRIGHT: (C)2012,JPO&INPIT |
