Flush toilet

Abstract

The flush toilet includes a toilet body including a bowl, a drain trap pipeline, and a skirt surrounding the bowl and the drain trap pipeline from the outside; a tank device disposed in a space that is inside the toilet body and that is located below the bowl, the tank device being configured to store flush water; and a functional device configured to supply flush water to the toilet body. The tank device includes a first tank portion and a second tank portion that are disposed on one side and another side, respectively, with respect to the center of the toilet body in the left-right direction in top view. The length of the second tank portion in the front-rear direction is set to be less than or equal to half the length of the first tank portion in the front-rear direction.

What is claimed is: 
     
         1 . A flush toilet that is a wall-mounted flush toilet, the flush toilet comprising:
 a toilet body including a bowl configured to receive waste, a drain trap pipeline connected to a lower portion of the bowl and configured such that waste is discharged along the drain trap pipeline, and a skirt surrounding the bowl and the drain trap pipeline from outside;   a tank device disposed in a space that is inside the toilet body and that is located below the bowl, the tank device being configured to store flush water that is to be supplied to the toilet body; and   a functional device configured to supply flush water to the toilet body,   wherein the tank device includes a first tank portion and a second tank portion that are arranged on one side and another side, respectively, with respect to a center of the toilet body in a left-right direction in top view, and   wherein a length of the second tank portion in a front-rear direction is set to be less than or equal to half a length of the first tank portion in the front-rear direction.   
     
     
         2 . The flush toilet according to  claim 1 ,
 wherein the tank device includes a coupling portion configured to couple the first tank portion and the second tank portion to each other, and   wherein the coupling portion is arranged at a center of the bowl in the front-rear direction in top view.   
     
     
         3 . The flush toilet according to  claim 2 , further comprising:
 a jet water ejection port arranged at a lower portion of the bowl and configured such that flush water is ejected through the jet water ejection port toward an inlet of the drain trap pipeline; and   a jet water conduit configured such that flush water is supplied along the jet water conduit to the jet water ejection port,   wherein an upper surface wall of the coupling portion has a concave shape, and the jet water conduit is arranged at the upper surface wall having the concave shape.   
     
     
         4 . The flush toilet according to  claim 1 ,
 wherein an upper surface wall of the second tank portion is set to be lower than an upper surface wall of the first tank portion.   
     
     
         5 . The flush toilet according to  claim 4 ,
 wherein a water-stop water level in the first tank portion is set to be higher than a water-stop water level in the second tank portion.   
     
     
         6 . The flush toilet according to  claim 1 ,
 wherein the functional device is a pump device configured to deliver flush water, which is stored in the tank device, under pressure to the toilet body.   
     
     
         7 . The flush toilet according to  claim 6 , further comprising:
 a jet water ejection port arranged at a lower portion of the bowl and configured such that flush water is ejected through the jet water ejection port toward an inlet of the drain trap pipeline;   a jet water conduit configured such that flush water is supplied along the jet water conduit to the jet water ejection port; and   a jet water supply pipe connecting the jet water conduit and the pump device to each other,   wherein the pump device and the jet water supply pipe are accommodated in a space that is inside the toilet body and that is located behind the second tank portion.   
     
     
         8 . The flush toilet according to  claim 6 , further comprising:
 a rim water ejection port arranged at a rim portion of the bowl and configured such that flush water is ejected through the rim water ejection port;   a rim water conduit configured such that flush water is supplied along the rim water conduit to the rim water ejection port; and   a rim water supply pipe connecting the rim water conduit and the pump device to each other,   wherein the pump device and the rim water supply pipe are accommodated in a space that is inside the toilet body and that is located behind the second tank portion.   
     
     
         9 . The flush toilet according to  claim 6 ,
 wherein the pump device is disposed near the second tank portion.   
     
     
         10 . The flush toilet according to  claim 9 ,
 wherein the second tank portion is provided with an outflow pipeline configured such that flush water stored in the tank device flows out along the outflow pipeline, and an outlet of the outflow pipeline is arranged to face an inflow port of the pump device.   
     
     
         11 . The flush toilet according to  claim 10 ,
 wherein an inlet of the outflow pipeline of the second tank portion is open downward.   
     
     
         12 . The flush toilet according to  claim 1 ,
 wherein the tank device includes a sectional-area decreasing portion where a horizontal cross-sectional area of the tank device decreases toward an upper portion of the tank device, and a float switch configured to detect a water level of flush water stored in the tank device, and   wherein the float switch is disposed at the sectional-area decreasing portion.