Flush toilet

Abstract

A flush toilet according to the present invention includes a bowl including a bowl-shaped waste receiving surface, a rim, a spouting port formed in the rim and a pooled water portion having a front region and a rear region, and includes a configuration where a ratio of an inflow flow rate of flush water into the front region of the pooled water portion in a second half of flushing period in a flushing period to “a total inflow flow rate of flush water into the pooled water portion” is larger than a ratio of an inflow flow rate of flush water into the front region of the pooled water portion in a first half of flushing period to “the total inflow flow rate of flush water into the pooled water portion”.

What is claimed is: 
     
         1 . A flush toilet that is flushed with flush water supplied from a flush water supply source to discharge waste, the flush toilet comprising:
 a bowl that receives waste, the bowl including:
 a bowl-shaped waste receiving surface, 
 a rim formed above the waste receiving surface, 
 a spouting port that is formed in the rim and that spouts flush water, and 
 a pooled water portion formed below the waste receiving surface, the pooled water portion having a front region on a front side and a rear region on a rear side that are obtained by dividing the pooled water portion into two regions in a front-rear direction, the flush toilet including a configuration where a ratio of an inflow flow rate of flush water into the front region of the pooled water portion in a second half of flushing period in a flushing period to “a total inflow flow rate of flush water into the pooled water portion” is larger than a ratio of an inflow flow rate of flush water into the front region of the pooled water portion in a first half of flushing period to “the total inflow flow rate of flush water into the pooled water portion”. 
   
     
     
         2 . The flush toilet according to  claim 1 , wherein the pooled water portion is divided into four regions by a front-rear center line that divides the pooled water portion into two regions of the front region and the rear region in the front-rear direction, and a left-right center line that divides the pooled water portion into two regions of a right region and a left region in a left-right direction, and
 in the first half of flushing period, a main flow of flush water that is formed on the waste receiving surface flows into the front region and/or the rear region of either region of the right region and the left region that is located downstream in a circulating direction of flush water.   
     
     
         3 . The flush toilet according to  claim 1 , wherein the waste receiving surface of the bowl comprises a concave portion formed in a fan shape that spreads from a front portion of the waste receiving surface toward the rear side in a planar view. 
     
     
         4 . The flush toilet according to  claim 1 , wherein the pooled water portion is divided into four regions by a front-rear center line that divides the pooled water portion into two regions of the front region and the rear region in the front-rear direction, and a left-right center line that divides the pooled water portion into two regions of a right region and a left region in a left-right direction, and
 a ratio of an inflow flow rate of flush water into the front region in either region of the right region and the left region in the second half of flushing period to “the total inflow flow rate of flush water into the pooled water portion” is larger than a ratio of each of inflow flow rates of flush water into three other regions to “the total inflow flow rate of flush water into the pooled water portion”.   
     
     
         5 . The flush toilet according to  claim 1 , wherein the bowl comprises a well portion that forms the pooled water portion,
 the flush toilet further comprising a discharge trap conduit connected to a bottom of the well portion, wherein the waste receiving surface comprises a concave portion formed in a region from a front portion of the waste receiving surface to a side portion of the well portion,   the well portion comprises a side wall that rises vertically and a front wall that rises vertically,   the side wall comprises an inclined portion inclined so that a height of a top edge decreases toward front, and   the inclined portion extends forward from the vicinity of a rear end of the concave portion.   
     
     
         6 . The flush toilet according to  claim 1 , wherein a lowermost portion of the concave portion of the waste receiving surface is disposed below an uppermost portion of the inclined portion of the well portion. 
     
     
         7 . The flush toilet according to  claim 1 , wherein the well portion further comprises an inducing portion in which a height of a top edge of the side wall is constant behind a rear end of the concave portion. 
     
     
         8 . The flush toilet according to  claim 1 , wherein an uppermost portion of the inclined portion of the top edge of the well portion is formed in front of a rear wall on the rear side of the well portion. 
     
     
         9 . The flush toilet according to  claim 1 , wherein a maximum value of a lateral width of the concave portion is smaller than a maximum value of a lateral width of the well portion in a planar view.