| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage device in which a vane wheel for generating a washing water flow in a drain bowl and washing can be easily installed in an attachable/detachable manner without a particularly large change in a conventional structure.SOLUTION: A drainage system is constructed by configuring a drain bowl 32 recessed downward from a bottom of a sink and by connecting a drain trap 34 holding a seal water 48 in its lower part by an outer tube 36 and an inner tube 46 to the drain bowl 32 by connection members 66, 68. In the drainage system, a vane wheel 96 having rotary blades 98 rotating around a rotating shaft 102 and generating a washing water flow by drain in the drain bowl 32 is assembled in the inner tube 46 via the rotating shaft 102, thereby installing the vane wheel 96 in an attachable/detachable manner in a state that the rotary blades 98 are positioned within the drain bowl 32. |
