Flush toilet

Abstract

A flush toilet includes: a bowl including a waste receiving surface, a rim, and a well portion; a first spouting port provided on a left side of the bowl and spouting flush water along the rim; a second spouting port provided on a right side of the bowl and spouting flush water toward a rear region of the bowl; and a discharge conduit connected to a bottom portion of the bowl, wherein the waste receiving surface and the inner circumference surface of the rim are connected to each other by a connecting portion, and the connecting portion includes, in the rear region of the bowl, an upward sloped portion sloped upward in a flow direction of the flush water, and a downward sloped portion positioned on a downstream side of the upward sloped portion and sloped downward in the flow direction of the flush water.

What is claimed is: 
     
         1 . A flush toilet for discharging waste with flush water supplied from a flush water supply source, the flush toilet comprising:
 a bowl including a bowl-shaped waste receiving surface, a rim having an inner circumference surface rising from an outer edge of the bowl-shaped waste receiving surface, and a well portion that is formed below the bowl-shaped waste receiving surface and inside which a pooled water surface is formed;   a first spouting port provided on the rim on one side in a left-right direction of the bowl and spouting flush water along the inner circumference surface of the rim to form a circulating flow;   a second spouting port provided on the rim on another side in the left-right direction of the bowl and spouting flush water toward a rear region of the bowl in a same direction as a circulating direction of the flush water that is spouted from the first spouting port; and   a discharge conduit connected to a bottom portion of the bowl,   wherein the bowl-shaped waste receiving surface and the inner circumference surface of the rim are connected to each other by a connecting portion, and the connecting portion includes, in the rear region of the bowl, an upward sloped portion which is sloped upward in a flow direction of the flush water that circulates along the rim and a downward sloped portion which is positioned on a downstream side of the upward sloped portion and which is sloped downward in the flow direction of the flush water.   
     
     
         2 . The flush toilet according to  claim 1 , wherein the upward sloped portion includes a concave curved portion which is curved so as to be recessed downward, and the downward sloped portion includes a convex curved portion which is curved so as to protrude upward. 
     
     
         3 . The flush toilet according to  claim 2 , wherein the upward sloped portion includes a convex curved portion which is positioned on a downstream side of the concave curved portion and which is curved so as to protrude upward.  4  The flush toilet according to  claim 1 , wherein a horizontal portion formed substantially horizontally is provided between the upward sloped portion and the downward sloped portion. 
     
     
         5 . The flush toilet according to claim  4 , wherein the horizontal portion is provided on one side in the left-right direction of the bowl on an opposite side to the second spouting port. 
     
     
         6 . The flush toilet according to  claim 1 , wherein in a height position of the bowl-shaped waste receiving surface, the another side in the left-right direction of the bowl is lower than the one side in the left-right direction of the bowl in the rear region of the bowl. 
     
     
         7 . The flush toilet according to  claim 1 , wherein the upward sloped portion is positioned in a vicinity of the second spouting port. 
     
     
         8 . The flush toilet according to  claim 1 , wherein a protruding portion protruding toward an inside of the bowl is provided in an upper portion of the inner circumference surface of the rim in a vicinity of an upstream side of the second spouting port, and
 wherein the protruding portion includes a bottom surface configured to change a flow direction of flush water flowing over the inner circumference surface of the rim to a downward direction.   
     
     
         9 . The flush toilet according to  claim 8 , wherein an amount of protrusion by which an innermost end of the protruding portion protrudes toward an inside of the bowl relative to a lower end of the inner circumference surface of the rim is set so as to become larger toward the downstream side and subsequently become smaller. 
     
     
         10 . The flush toilet according to  claim 9 , wherein a maximum amount of protrusion of the protruding portion is set so as to be maximized in the inner circumference surface of the rim in the rear region of the bowl. 
     
     
         11 . The flush toilet according to  claim 8 , wherein the inner circumference surface of the rim below the protruding portion is formed such that a curvature radius of the inner circumference surface in a plan view is minimized in a whole circumference of the bowl. 
     
     
         12 . The flush toilet according to  claim 11 , wherein a top edge portion of the bowl-shaped waste receiving surface is sloped upward toward the protruding portion from a front end of the bowl-shaped waste receiving surface. 
     
     
         13 . The flush toilet according to  claim 8 , wherein a sloped portion which is sloped upward toward an inside of the bowl is provided on the inner circumference surface of the rim above the second spouting port, and the sloped portion is provided on a downstream side of the protruding portion. 
     
     
         14 . The flush toilet according to  claim 8 , wherein the bottom surface of the protruding portion is formed so that an entire surface of the bottom surface is directed toward the pooled water surface in the well portion.