Flush toilet

Abstract

A flush toilet includes: a main toilet unit having a bowl portion and a discharge trap pipe extending from a lower part of the bowl portion; a jet spout port configured to spout out flush water into an inside of the discharge trap pipe in a rearward direction; and a jet water conduit configured to supply the flush water to the jet spout port, wherein the jet water conduit has a downstream side water conduit extending to the jet spout port and an upstream side water conduit connected to the downstream side water conduit, the downstream side water conduit is made of porcelain, and a connecting portion between the upstream side water conduit and the downstream side water conduit is located on a rear side with respect to the jet spout port and lower than a pooled water surface.

What is claimed is: 
     
         1 . A flush toilet comprising:
 a main toilet unit having a bowl portion and a discharge trap pipe extending from a lower part of the bowl portion;   a jet spout port configured to spout out flush water into an inside of the discharge trap pipe in a rearward direction; and   a jet water conduit configured to supply the flush water to the jet spout port,   wherein   the jet water conduit has a downstream side water conduit extending to the jet spout port and an upstream side water conduit connected to the downstream side water conduit,   the downstream side water conduit is made of porcelain, and   a connecting portion between the upstream side water conduit and the downstream side water conduit is located on a rear side with respect to the jet spout port and lower than a pooled water surface.   
     
     
         2 . A flush toilet comprising:
 a main toilet unit having a bowl portion and a discharge trap pipe extending from a lower part of the bowl portion;   a jet spout port configured to spout out flush water into an inside of the discharge trap pipe in a rearward direction; and   a jet water conduit configured to supply the flush water to the jet spout port,   wherein   the jet water conduit has a downstream side water conduit extending to the jet spout port and an upstream side water conduit connected to the downstream side water conduit,   the downstream side water conduit is made of porcelain, and   a connecting portion between the upstream side water conduit and the downstream side water conduit is located below the bowl portion and/or a rim portion.   
     
     
         3 . The flush toilet according to  claim 1 , wherein
 the connecting portion between the upstream side water conduit and the downstream side water conduit is located below the bowl portion and/or a rim portion.   
     
     
         4 . The flush toilet according to  claim 1 , wherein
 the connecting portion between the upstream side water conduit and the downstream side water conduit is provided with a sealing member.   
     
     
         5 . The flush toilet according to  claim 4 , wherein
 the upstream side water conduit includes a hose made of resin.   
     
     
         6 . The flush toilet according to  claim 1 , wherein
 the connecting portion between the upstream side water conduit and the downstream side water conduit is located at a position higher than a lowest opened edge of the jet spout port.   
     
     
         7 . The flush toilet according to  claim 1 , further comprising:
 a tank configured to temporarily store the flush water; and   a pump configured to pump up the flush water that has been stored in the tank;   wherein   the pump is positioned on one side with respect to the discharge trap pipe in a left-and-right direction, and   the connecting portion between the upstream side water conduit and the downstream side water conduit is also positioned on the same one side with respect to the discharge trap pipe in the left-and-right direction as the pump.   
     
     
         8 . The flush toilet according to  claim 7 , wherein
 the jet spout port is open in a rearward direction that is aligned in a front-and-rear direction, and   the connecting portion between the upstream side water conduit and the downstream side water conduit also extends in a direction that is aligned in the front-and-rear direction.   
     
     
         9 . The flush toilet according to  claim 1 , wherein
 the flush toilet is a wall-mounted type of flush toilet.   
     
     
         10 . The flush toilet according to  claim 2 , wherein
 the connecting portion between the upstream side water conduit and the downstream side water conduit is provided with a sealing member.   
     
     
         11 . The flush toilet according to  claim 10 , wherein
 the upstream side water conduit includes a hose made of resin.   
     
     
         12 . The flush toilet according to  claim 2 , wherein
 the connecting portion between the upstream side water conduit and the downstream side water conduit is located at a position higher than a lowest opened edge of the jet spout port.   
     
     
         13 . The flush toilet according to  claim 2 , further comprising:
 a tank configured to temporarily store the flush water; and   a pump configured to pump up the flush water that has been stored in the tank;   wherein   the pump is positioned on one side with respect to the discharge trap pipe in a left-and-right direction, and   the connecting portion between the upstream side water conduit and the downstream side water conduit is also positioned on the same one side with respect to the discharge trap pipe in the left-and-right direction as the pump.   
     
     
         14 . The flush toilet according to  claim 13 , wherein
 the jet spout port is open in a rearward direction that is aligned in a front-and-rear direction, and   the connecting portion between the upstream side water conduit and the downstream side water conduit also extends in a direction that is aligned in the front-and-rear direction.   
     
     
         15 . The flush toilet according to  claim 2 , wherein
 the flush toilet is a wall-mounted type of flush toilet.