To provide a compact waterline straight-hydraulic flush toilet bowl equipped with a backflow preventing means.
The flush toilet bowl includes: a bowl part 4 having a dirt receiving surface for receiving dirt, and a rib part 6 formed above; a trap part extended continuously from a lower part of the bowl part 4 to discharge dirt; a skirt part covering the bowl part 4 and forming the exterior of the flush toilet bowl; and a water supply device 11 having the backflow preventing means 19 preventing dirt or the like from flowing back to a water pipe, and directly connected to the water pipe to supply the bowl part 4 with flushing water. The skirt part is formed with an outflow port 14a below the backflow preventing means 19 of the water supply device 11 serving as communication between the bowl part 4 and outside air and allowing sewage or the like to overflow to the outside of the flush toilet bowl when the flush toilet bowl is clogged.
SHIBATA SHINJI
YOKOYAMA RIE
INOMOTO MISA
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