PROBLEM TO BE SOLVED: To simply and speedily attach and detach a cuspidor by avoiding a bowl washing tube.SOLUTION: At a sewage drain port in the lower surface of the cuspidor, an insertion convex part having an engaging piece is provided. In a sewage drain port on the unit body side, an insertion concave part which engages the engaging piece of the insertion convex part by only inserting the insertion convex part and rotating the same a little and fixes the cuspidor to the unit body is provided. Moreover, the insertion convex part is provided at the eccentric position of the cuspidor. By rotating the cuspidor with the eccentric position as the center, the outer periphery edge of the cuspidor is moved away from the lower surface of the bowl washing tube to prevent the bowl washing tube from interfering with the attaching and detaching of the cuspidor.COPYRIGHT: (C)2010,JPO&INPIT【課題】鉢洗管を避けてスピットンを簡単かつ短時間に着脱する。【解決手段】スピットンの下面における汚水排出口部に係止片を有する挿入凸部を設けるとと共に、ユニット本体側の汚水排出口部に前記挿入凸部を挿入し僅か回転するだけで挿入凸部の係止片を係止してスピットンをユニット本体に固定する挿入凹部を設ける。更に前記挿入凸部をスピットンの偏心位置に設けて、スピットンを偏心位置中心に回転することによりスピットンの外周縁を鉢洗管下面から遠ざけ、鉢洗管がスピットンの着脱に干渉することを避ける。【選択図】図5
