To easily manufacture the valve device of a water flushing device and reduce the cost by dividing a flush valve communicating the water feed side to the discharge side by supplying compressed gas and closing the valve mechanism by discharging the compressed gas, into a plurality of valve units.
The pedal of a foot switch 15 stepped on so as to feed a fixed quantity of air to the air bag 38 of a flush valve 1, and the air bag 38 is expanded so as to open a pilot valve 35. Next the pressure of a back pressure chamber 9 is reduced so as to open a valve mechanism 11 and begin to discharge water, and when the pedal is further stepped on, air is released from a relief valve so as to deflate the air bag 38. Next the valve mechanism 11 is closed by pressure difference in the flush valve 1 so as to stop water, and hence a fixed quantity of water can be discharged only by the operation stepping An the pedal. Because this flush valve is divided into first, second, and third valve units 1A, 1B, 1C, the mold drawing is simplified, and the manufacture is made easy.
TSUBOI HIROYUKI
SATO MINORU
YANASE MICHINORI
