| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a drain-pipe joint capable of improving performance in which the vent state of a horizontal path on the opening side of a communication opened to a drum section and the drum section is maintained. SOLUTION: The drain-pipe joint 10 has the approximately cylindrical drum section 11, an opening 14 for the communication and a back-flow check eaves section 15. The drum section 11 has an upper connecting section and a lower connecting section capable of being connected to a drain riser respectively. The opening 14 for the communication is opened to the inner circumferential surface 12 of the drum section, and communicates with the fixed horizontal path 27. The eaves section 15 is arranged on the upper edge 14a side of the opening 14 for the communication on the inner circumferential surface 12 side of the drum section, and prevents a back flow to the horizontal path 27 side of drain WV flowing down from an upper section. The eaves section 15 is disposed along the approximately axial orthogonal direction of the drum section so as to be projected to the axial-center side of the drum section on the inner circumferential surface 12 side of the drum section. A water collecting section 16 collecting drain WV from the upper section and making it flow down is disposed to an upper section in the vicinity of the center 14c of the opening 14 for the communication from the axial-center side of the drum section in the eaves section 15.</p> |
