| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a synthetic resin pipe coupling for drain confluence, which has a short outer diameter of the coupling and a short length in a coupling vertical axis direction, is downsized as a whole and excellent in drainage performance, and is suitable for a low rise architectural structure.SOLUTION: In a pipe coupling for drain confluence: a guide cylinder 12 and a swirl vane 2 are provided in a synthetic resin coupling body 1 including vertical pipe connection ports 8a, 8b in its upper and lower parts and two branch pipe connection ports 5a, 5b in its intermediate part 4; the two branch pipe connection ports 5a, 5b are arranged at intervals of 90° and backflow prevention plates 3 are provided on both sides of the branch pipe connection ports 5a, 5b. Only one swirl vane 2 is positioned and provided below the branch pipe connection ports 5a, 5b and arranged in the middle between the two branch pipe connection ports 5a, 5b in a plan view, and the protruded heights of the backflow prevention plates 3 are formed so as not to protrude into a diameter of the guide cylinder 12 in a plan view and the backflow prevention plates 3 are provided on both sides of the branch pipe connection ports 5a, 5b, respectively, thus providing three plate materials in total.</p> |
