Flush toilet

Abstract

The present invention provides a siphon jet flush toilet, in which flush water is discharged from a rim spout port and a jet spout port at different timings, including a bowl including a waste receiving surface, a rim, a shelf surface, and a basin; a rim spout port provided in the rim, and spouting flush water along an inner peripheral surface of the rim; and a jet spout port provided in a bottom portion of the bowl, and spouting flush water toward an inlet of a discharge trap conduit, and the flush toilet is formed so that a curvature radius of a front end of the basin is smaller than a curvature radius of the inner peripheral surface of the rim in a front end of the bowl in planar view.

The invention claimed is: 
     
         1 . A siphon jet flush toilet, in which flush water is discharged from a rim spout port and a jet spout port at different timings, comprising:
 a bowl including a bowl-shaped waste receiving surface, a rim formed at a top portion of the waste receiving surface, a shelf surface formed between the waste receiving surface and the rim, and a basin formed below the waste receiving surface and having a reservoir surface formed inside;   a discharge trap conduit having an inlet connected to a bottom portion of the bowl to discharge waste;   a rim spout port provided in the rim, and spouting flush water along an inner peripheral surface of the rim; and   a jet spout port provided in the bottom portion of the bowl, and spouting flush water toward the inlet of the discharge trap conduit,   the flush toilet being formed so that a curvature radius of a front end of the basin is smaller than a curvature radius of the inner peripheral surface of the rim in a front end of the bowl in planar view.   
     
     
         2 . The flush toilet according to  claim 1 , wherein after flush water is discharged from the rim spout port, flush water is discharged from the jet spout port. 
     
     
         3 . The flush toilet according to  claim 2 , wherein after the flush water discharged from the rim spout port flows into the reservoir surface, flush water is discharged from the jet spout port. 
     
     
         4 . The flush toilet according to  claim 1 , wherein while flush water is discharged from the jet spout port, flush water is continuously discharged from the rim spout port. 
     
     
         5 . The flush toilet according to  claim 1 , wherein the waste receiving surface is formed so that an inclination angle at which the waste receiving surface is inclined down toward the center of the bowl is minimized in a front region. 
     
     
         6 . The flush toilet according to  claim 1 , which is formed so that in the front end of the bowl, the curvature radius of the inner peripheral surface of the rim is larger than a curvature radius of an outer shell of the toilet main body in planar view. 
     
     
         7 . The flush toilet according to  claim 6 , wherein the inner peripheral surface of the rim, in planar view, is formed with a minimum curvature radius in the front end of the bowl and formed with a curvature radius larger than the minimum curvature radius behind the front end of the bowl. 
     
     
         8 . The flush toilet according to  claim 6 , wherein in the front end of the bowl, the inner peripheral surface of the rim is formed so that a curvature radius of a lower end of the inner peripheral surface in planar view is larger than the curvature radius of the outer shell of the toilet main body and is formed so that a curvature radius above the lower end is about the same size as the curvature radius of the outer shell of the toilet main body. 
     
     
         9 . The flush toilet according to  claim 8 , wherein the bowl includes the shelf surface formed between the waste receiving surface and the rim and through which the flush water discharged from the rim spout port swirls, and
 is formed so that a curvature radius of a front end of the waste receiving surface is larger than the curvature radius of the inner peripheral surface of the rim in the front end of the bowl in planar view.   
     
     
         10 . The flush toilet according to  claim 1 , wherein the rim spout port is disposed behind a position at which a width of the waste receiving surface in a left-right direction is maximized in planar view. 
     
     
         11 . The flush toilet according to  claim 10 , wherein the waste receiving surface is formed in a concave shape recessed downward in a front region of the waste receiving surface. 
     
     
         12 . The flush toilet according to  claim 11 , wherein the waste receiving surface is formed in a convex shape that protrudes upward in a region behind the rim spout port. 
     
     
         13 . The flush toilet according to  claim 11 , wherein the waste receiving surface is formed in a convex shape that protrudes upward in a region behind the front region. 
     
     
         14 . The flush toilet according to  claim 10 , wherein the rim is formed so that the inner peripheral surface of the rim overhangs inward as being upward, and
 is formed so that an amount of overhang of the inner peripheral surface of the rim is maximized in the front end of the bowl.   
     
     
         15 . The flush toilet according to  claim 10 , wherein the rim is formed so that the inner peripheral surface of the rim is inclined inward as being upward, and
 is formed so that an inclination angle at which the inner peripheral surface of the rim is inclined inward relative to a vertical direction is maximized in the front end of the bowl.