| 摘要 |
PROBLEM TO BE SOLVED: To provide a flush toilet bowl capable of improving discharge performance of dirt and the like by effectively forming vertically swirling flow in regard to wash water supplied from a flush valve to a bowl part of the toilet bowl.SOLUTION: An inventive flush toilet bowl 1 includes: a first water discharge part 26 which discharges wash water onto a rim part 20 and forms swirl flow on a dirt receiving surface; a second water discharge part 28 which is formed on the side face of a bowl part 10, below the dirt receiving surface, and above an initial reserved water level L, and forms a flow agitating vertically wash water in the bowl part; a first water flow passage 12 supplying wash water to the first water discharge part; and a second water flow passage 14 supplying wash water to the second water discharge part. The second water flow passage comprises: an inflow part 38 into which wash water supplied from a flush valve 6 flows; an expansion part 40 so formed that a flow passage becomes gradually larger from the inflow part toward a downstream side; and a throttle part 42 formed near the second water discharge part so that a flow passage becomes gradually smaller from the expansion part toward a downstream side. |
