Urinal drain trap

Abstract

Provided is a urinal drain trap which is capable of preventing diffusion of odor for a long period of time. The urinal drain trap ( 10 ) is equipped with a lid ( 11 ) having an inlet ( 11 A); a body ( 12 ) having an outlet ( 12 C); and a tubular partition wall ( 13 ). The interior of the body ( 12 ) is divided into a first region ( 31 ) and a second region ( 32 ). The first region ( 31 ) and the second region ( 32 ) are linked with each other by a third region ( 33 ). Sealing liquid is injected into the first region ( 31 ), this sealing liquid being non-water-soluble, having a lower specific gravity than urine, and forming a sealing layer (S) at an elevation above retained urine. In a peripheral area of the lower end of the partition wall ( 13 ), there is formed a connecting portion ( 14 ) which extends laterally. In a peripheral area of the tip of the connecting portion ( 14 ), there is formed a folded portion ( 15 ) which extends upward. Between the partition wall ( 13 ) and the folded portion ( 15 ), the inlet ( 11 A) is provided, in such a way as to form a through opening, at a location where urine flows in from above. The outlet ( 12 C) is located in the second region ( 32 ) and is open at an elevation above the upper end of the folded portion ( 15 ).

1 . A urinal drain trap including:
 a lid fitted in an opening defined in a lower end of a urinal bowl surface and having an inlet through which urine flowing along the urinal bowl surface further flows;   a body having a sidewall which is formed so as to extend downward from a peripheral edge of the lid, a bottom which is formed to be continuous to a lower end of the sidewall, and an outlet over which collected urine flows; and   a hollow partition wall provided inward of an outer circumferential edge of the lid and having a lower end that is open with a distance between the bottom of the body and said lower end, wherein:   the body has an interior which is divided by the partition wall into a first region defined outside the partition wall and a second region defined inside the partition wall, the first and second regions communicating with each other via a third region defined below the lower end of the partition wall and above the bottom; and   a sealing liquid that is water-insoluble and has a smaller specific gravity than urine is poured into either the first or the second region thereby to be formed into a sealing layer over remaining urine, the urinal drain trap being characterized in that:   the lower end of the partition wall has a peripheral edge that is formed with a connecting portion extending in a lateral direction toward one of the first and second regions, the connecting portion having a distal end peripheral edge formed with a folded portion extending upward; and   the inlet is defined between the partition wall and the folded portion so that urine flows thereinto from above, and the outlet is open above an upper end of the folded portion within the other of said first and second regions.   
     
     
         2 . The urinal drain trap according to  claim 1 , wherein the inlet is defined so as to extend along the partition wall. 
     
     
         3 . The urinal drain trap according to  claim 1  or  2 , wherein a predetermined space is defined between the folded portion and the partition wall. 
     
     
         4 . The urinal drain trap according to  claim 1  or  2 , wherein the folded portion extends by a length that is equal to or longer than a central height between a peripheral edge of a distal end of the connecting portion and an upper surface of the sealing layer. 
     
     
         5 . The urinal drain trap according to  claim 1  or  2 , wherein the upper end of the folded portion is located lower than an underside of the sealing layer. 
     
     
         6 . The urinal drain trap according to  claim 1  or  2 , wherein the folded portion is located at a middle position between the partition wall and the sidewall. 
     
     
         7 . The urinal drain trap according to  claim 1  or  2 , wherein the outlet is formed in an upper end of an outflow conduit which rises from the bottom of the body in the second region and is disposed at a position biased in a direction in an interior of the partition wall in a planar view. 
     
     
         8 . A urinal drain trap including:
 a lid fitted in an opening defined in a lower end of a urinal bowl surface and having an inlet into which urine having flowed along the urinal bowl surface further flows;   a body having a sidewall which is formed so as to extend downward from a peripheral edge of the lid, a bottom which is formed to be continuous to a lower end of the sidewall, and an outlet over which collected urine flows; and   a hollow partition wall provided inward of an outer circumferential edge of the lid and formed so as to extend downward from a closed upper end and having a lower end that is open with a distance between the bottom of the body and said lower end, wherein:   the body has an interior which is divided by the partition wall into a first region defined outside the partition wall and a second region defined inside the partition wall, the first and second regions communicating with each other via a third region defined below the lower end of the partition wall and above the bottom; and   a sealing liquid that is water-insoluble and has a smaller specific gravity than urine is poured into the first region thereby to be formed into a sealing layer over remaining urine, the urinal drain trap being characterized in that:   the inlet is defined at a location where urine flows thereinto from above in the first region; and   the outlet is formed in an upper end of an outflow conduit which rises from the bottom of the body in the second region and is disposed at a position biased in a direction in an interior of the partition wall in a planar view.   
     
     
         9 . The urinal drain trap according to  claim 8 , wherein the outflow conduit has a larger flow passage area than an ascending flow path defined by an outer surface of the outflow conduit and an inner surface of the partition wall as the second region is viewed in a top cross-section. 
     
     
         10 . The urinal drain trap according to  claim 8  or  9 , wherein the partition wall is formed so as to extend from a middle portion of the body toward an inner peripheral surface of the sidewall in a top cross-section of the partition wall. 
     
     
         11 . The urinal drain trap according to  claim 8  or  9 , wherein the partition wall is formed into a cylindrical shape, and the outflow conduit is formed into a semi-circular cylindrical shape and disposed so that an arc-shaped outer surface is located near the inner surface of the partition wall. 
     
     
         12 . The urinal drain trap according to  claim 8  or  9 , wherein the third region has a vertical dimension that is larger than a transverse dimension of a urine descending flow path formed in the first region and the ascending flow path in a vertically middle section. 
     
     
         13 . The urinal drain trap according to any one of  claims 1 ,  2 ,  8  and  9 , to which a drain conduit is connected and which is formed into a cartridge type so as to be detachably attached to a recess that is upwardly open in the lower end of the urinal bowl surface.