To prevent the blocking in a pipe by providing a stream lining plate to prevent the sidewise scattering of the drainage from a horizontal branched pipe after collision on the side of the position at which the drainages from the horizontal branch pipe collides.
A first stream lining plate 20 of arc-shaped section is provided along the range of approximately semi-circumference on a horizontal branch pipe socket 6 side along an upper socket 2a of an upper joint 2 of a drain collecting pipe joint. A separation guide 21 of approximately trigon shape is projected inward of the pipe. A second stream lining plate 30 is provided in an expanding manner so as to surround the drain collision position from the wall surface in the pipe toward the center of the pipe on the wall surface in the pipe opposite to the horizontal branched pipe socket 6. The drain flowing down from a riser pipe 4 flows down in a straightened condition without being scattered forward of the horizontal branched pipe socket 6 by the first stream lining plate 20. The drain collided with the wall surface of the pipe flows down without being scattered sidewise by the second stream lining plate 30. Blocking in the pipe can be prevented even when the drain lows in a stretch.
Kako, Yozo
Kojima, Noriatsu
Kojima, Seizo
