urinal

Abstract

To provide a urinal that can effectively clean the toilet bowl. [Solution] The urinal 1 is equipped with a toilet bowl 10 having a shelf surface 20 that guides flushing water to the lower front end. The shelf surface 20 has a plane 20H that extends in the vertical direction. In the horizontal cross-sectional shape of the urinal 1 in its installed state, the left-right width of the plane 20H changes between the upper end and the lower end of the shelf surface 20.

Description

Technical Field

[0001] The present disclosure relates to a urinal.

Background Art

[0002] Patent Document 1 discloses a conventional urinal. This urinal includes a toilet bowl portion having a shelf surface that extends in the vertical direction and guides washing water to the lower front end. This shelf surface has a forward inclined surface that is inclined toward the front of the center of the left and right of the toilet bowl portion, and a reverse inclined surface that is inclined toward the front of the left and right outer sides of the toilet bowl portion. The shelf surface is formed by continuously connecting the forward inclined surface and the reverse inclined surface. In this urinal, on the shelf surface which is the reverse inclined surface, since the washing water flowing down from the shelf surface to the inside is suppressed, the washing water can be well guided to the lower front end.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the urinal of Patent Document 1, on the reverse inclined surface of the shelf surface, the washing water flowing down from the shelf surface to the inside may be separated, and there is a possibility that the inside of the toilet bowl portion more than the shelf surface cannot be partially washed.

[0005] The present disclosure has been made in view of the above conventional situation, and an object to be solved is to provide a urinal that can wash the toilet bowl portion well.

Means for Solving the Problems

[0006] The urinal of this disclosure comprises a toilet bowl having a shelf surface that guides flushing water to the lower front end, and has a plane that extends in the vertical direction, and in the horizontal cross-sectional shape when installed, the left-right width of the plane changes between the upper end and the lower end of the shelf surface. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view of the urinal according to Embodiment 1. [Figure 2] This is a cross-sectional view taken along the arrow AA in Figure 1. [Figure 3] This is a side view of the urinal according to Embodiment 1. [Figure 4] This is a plan view of the urinal according to Embodiment 1. [Figure 5] This is a rear view of the urinal according to Embodiment 1. [Figure 6] This is a cross-sectional view of BB taken along the arrow in Figure 1. [Figure 7] This is a cross-sectional view of CC taken along the arrow in Figure 1. [Figure 8] This is a cross-sectional view taken along the arrow DD in Figure 1. [Figure 9] This is a cross-sectional view of EE taken along the arrow in Figure 1. [Figure 10] This is a cross-sectional view of FF as seen by the arrow in Figure 1. [Figure 11] This is a cross-sectional view of GG as seen through the arrow in Figure 1. [Modes for carrying out the invention]

[0008] Embodiment 1 of the urinal described herein will be described with reference to the drawings. In the description, up and down refers to the up and down position when the urinal is installed with its wall-mounting surface in contact with the wall, and is the up and down position in Figure 1. Left and right refers to the left and right positions when the urinal is installed with its wall-mounting surface in contact with the wall, as viewed from the front, and is the left and right positions in Figure 1. Front and back refers to the rear side of the urinal when its wall-mounting surface is in contact with the wall, and the opposite side is the front, and is the left and right positions in Figures 2 and 3.

[0009] <Embodiment 1> As shown in Figures 1 to 5, the urinal 1 of Embodiment 1 comprises a toilet bowl 10, left and right wall sections 30, an upper wall section 50, a rear wall section 70, a drain trap section 90, and a spreader 100. The toilet bowl 10, left and right wall sections 30, upper wall section 50, rear wall section 70, and drain trap section 90 are made of ceramic and are integrally formed.

[0010] The toilet bowl section 10 has a bowl-shaped receiving section 11 formed at the bottom and a vertical section 13 that extends upward in a continuous manner from the upper end of the receiving section 11. The receiving section 11 has a drain opening 11A formed at its lower end. A drain cover 12 is detachably placed on the drain opening 11A. The drain opening 11A is in communication with the upstream end of a drain trap section 90 provided at the bottom of the receiving section 11.

[0011] The vertical section 13 comprises a central vertical section 13A extending vertically from the left and right center, and left and right vertical sections 13B extending curved forward from the central vertical section 13A. The vertical section 13 is open to the front. The central vertical section 13A has a flat section facing forward. This flat section is only around the part where the spreader 100 is attached, and the area around it is curved. The spreader 100 is attached to the top of the central vertical section 13A. The spreader 100 discharges cleaning water downwards towards the central vertical section 13A and the left and right vertical sections 13B, spreading to both the left and right sides. The spreader 100 corresponds to the water discharge section.

[0012] The left and right wall sections 30 extend towards the rear, with their front edges continuous with the left and right edges of the vertical surface section 13 of the toilet bowl section 10, above the receiving section 11 of the toilet bowl section 10. The left and right wall sections 30 extend towards the rear, with their respective front edges continuous with the left and right central parts of the urinal 1, below the upper edge of the receiving section 11 of the toilet bowl section 10.

[0013] As shown in Figure 3, the rear edges of the left and right wall sections 30 extend in a straight line vertically in a side view of the urinal 1 (hereinafter referred to as "side view"). The rear end surfaces 30B of the left and right wall sections 30 form part of the wall-mounting surface that abuts against the wall. The upper edges 30U of the left and right wall sections 30 extend in a straight line, slightly inclined downward toward the front in a side view. The front edges 30F of the left and right wall sections 30 extend in a straight line, inclined forward toward the downward toward the center of the urinal 1 in a side view. The front edges 30F of the left and right wall sections 30 extend in a curved shape, concave diagonally downward toward the rear, from below the center of the urinal 1 in a side view to the front upper edge of the receiving portion 11 of the toilet bowl section 10. The front edges 30F of the left and right wall sections 30 extend in a curved shape in a side view, starting from the upper front edge of the receiving portion 11 of the toilet bowl section 10, along the front surface of the receiving portion 11, and curving downward and forward at the lower part. The lower edges 30D of the left and right wall sections 30 extend slightly above the lower edge of the front edge and toward the rear in a side view. The left and right wall sections 30 conceal the toilet bowl section 10 in a side view. As shown in Figure 1, the left and right wall sections 30 conceal the receiving portion 11 of the toilet bowl section 10 in a front view (hereinafter referred to as "front view") of the urinal 1.

[0014] As shown in Figures 2 and 4, the upper wall portion 50 is continuous with the upper edge of the toilet bowl portion 10. The upper surface of the upper wall portion 50 is a plane that slopes downward toward the front. The rear end surface 50B of the upper wall portion 50 extends on the same plane as the rear end surfaces of the left and right wall portions 30 and constitutes part of the wall-mounting surface that abuts against the wall. As shown in Figure 4, the front end edge 50F of the upper wall portion 50, when viewed from above (hereinafter referred to as "top view") of the urinal 1, curves so that the left and right central portions are recessed toward the rear and extends in a curved shape in the left and right direction. At both left and right ends, the front end edge 50F of the upper wall portion 50 does not protrude from the left and right ends of the upper edge of the toilet bowl portion 10, but is formed to gradually protrude forward from the surface of the upper edge of the toilet bowl portion 10 toward the left and right central portions.

[0015] As shown in Fig. 5, the rear wall portion 70 connects the left and right wall portions 30, the upper wall portion 50, the toilet bowl portion 10, and the drain trap portion 90 behind the toilet bowl portion 10. The rear wall portion 70 is divided into left and right parts with the left and right central part of the toilet bowl portion 10 in between. The upper edge of each rear wall portion 70 is continuous with the lower surface of the upper wall portion 50. One of the left and right edges of each rear wall portion 70 is continuous with the inner surface of the left and right wall portions 30, and the other left and right edges are continuous with the rear surface of the toilet bowl portion 10. The lower edge of each rear wall portion 70 is continuous with the upper end portion of the drain trap portion 90. Each rear wall portion 70 is located slightly forward of the rear end surface 30B of the left and right wall portions 30 and the rear end surface 50B of the upper wall portion 50. Each rear wall portion 70 has a rim portion 71 that protrudes rearward and extends and bends in the vertical direction on the toilet bowl portion 10 side. The rear end surface 71B of each rim portion 71 extends on the same plane as the rear end surface 30B of the left and right wall portions 30 and the rear end surface 30B of the upper wall portion 50, and constitutes a part of the wall contact surface that contacts the wall surface.

[0016] As shown in Figs. 1 and 2, the toilet bowl portion 10 has a pair of shelf surfaces 20 that extend in the vertical direction. Each shelf surface 20 is formed on the surface of the toilet bowl portion 10 and guides the washing water to the lower front end portion of the toilet bowl portion 10. Each shelf surface 20 is formed at a distance from the left and right with the left and right center line of the urinal 1 as the symmetry. The upper end of each shelf surface 20 is formed below the spreader 100. The upper end of each shelf surface 20 is located at the boundary between the central vertical surface 13A and the left and right vertical surfaces 13B of the toilet bowl portion 10. When viewed from the front, each shelf surface 20 bulges and curves outward to the left and right so that the distance gradually widens from the upper end to the vicinity of the reaching portion X described later, and the distance gradually narrows from the vicinity of the reaching portion X to the lower end. The surface of the toilet bowl portion 10 on the left and right central side of each shelf surface 20 and between each shelf surface 20 is the central toilet bowl surface U. The surface of the toilet bowl portion 10 outside each shelf surface 20 is the outer toilet bowl surface S.

[0017] As shown in FIGS. 6 to 11, each shelf surface 20 includes a flat surface 20H, an outer curved surface 20SR, and an inner curved surface 20UR. In the horizontal cross-sectional shape (hereinafter referred to as the "horizontal cross-sectional shape") in the state where the wall-attached surface of the urinal 1 is abutted against the wall surface, the region from the midpoint of the outer curved surface 20SR to the midpoint of the inner curved surface 20UR is the shelf surface 20. The flat surface 20H of each shelf surface 20 extends downward from the upper end of the shelf surface 20 in a front view. The flat surface 20H of each shelf surface 20 has a length of about 3 / 4 of the vertical length of the shelf surface 20 in a front view. The flat surface 20H of each shelf surface 20 is formed parallel to a virtual plane (hereinafter referred to as the "virtual plane") on the same plane as the wall-attached surface formed by the rear end surfaces 30B of the left and right wall portions 30, the rear end surface 50B of the upper wall portion 50, and the rear end surfaces 71B of the rim portions 71 of the respective rear wall portions 70 in the horizontal cross-sectional shape. Specifically, in the horizontal cross-sectional shape, the distance from the virtual plane to the central end on the left and right side (midpoints UP1, UP2, UP3, UP4, UP5, UP6 of the inner curved surface 20UR) of the shelf surface 20 is equal to the distance from the virtual plane to the outer end on the left and right side (midpoints SP1, SP2, SP3, SP4, SP5, SP6 of the outer curved surface 20SR). The distance from the virtual plane is the shortest distance from the virtual plane to the target part (hereinafter the same). The left and right widths H1, H2, H3, H4 of the flat surface 20H of each shelf surface 20 gradually decrease from below the reaching portion X toward the lower end.

[0018] In the horizontal cross-sectional shape, at all regions from the upper end to the lower end of each shelf surface 20, the outer ends on the left and right side (midpoints SP1, SP2, SP3, SP4, SP5, SP6 of the outer curved surface 20SR) are farther from the virtual plane than the central ends on the left and right side (midpoints UP1, UP2, UP3, UP4, UP5, UP6 of the inner curved surface 20UR). The difference between the distance from the virtual plane to the outer ends SP1, SP2, SP3, SP4, SP5, SP6 on the left and right side and the distance from the virtual plane to the central ends UP1, UP2, UP3, UP4, UP5, UP6 on the left and right side varies depending on the height of the shelf surface 20. Specifically, the change from the reaching portion X to the lower end is larger than the change from the upper end of the shelf surface 20 to the reaching portion X.

[0019] If we define the direction in which each shelf surface 20 faces as perpendicular to the imaginary straight line connecting the left and right central ends (UP1, UP2, UP3, UP4, UP5, UP6) and the left and right outer ends (SP1, SP2, SP3, SP4, SP5, SP6), then each shelf surface 20 faces forward of the left and right center of the toilet bowl section 10 throughout its entire range from the top to the bottom, and the angle of inclination with respect to the imaginary plane gradually increases downwards.

[0020] Each shelf surface 20 has a first region with a constant width extending horizontally, as shown by W1 and W2 in Figures 6 and 7; a second region that extends downward from the lower end of the first region, as shown by W2, W3, W4 and W5 in Figures 7 to 10, with a width that gradually decreases downwards; and a third region that extends downward from the lower end of the second region, as shown by W5 and W6 in Figures 10 and 11, with a constant width. The first region extends from the upper end of each shelf surface 20 to the vicinity of the reachable section X, which will be described later. The second region extends from the lower end of the first region to the vicinity where the plane 20H of the shelf surface 20 disappears.

[0021] In the area where the flat surface 20H of the shelf surface 20 extends in the vertical direction, the outer curved surface 20SR connects the flat surface 20H and the outer toilet bowl surface S. The inner edge of the outer curved surface 20SR is continuous with the flat surface 20H, and the outer edge is continuous with the outer toilet bowl surface S. In the area where the flat surface 20H of the shelf surface 20 extends in the vertical direction, the inner curved surface 20UR connects the flat surface 20H and the central toilet bowl surface U. The outer edge of the inner curved surface 20UR is continuous with the flat surface 20H, and the inner edge is continuous with the central toilet bowl surface U. In the area where the flat surface 20H of the shelf surface 20 does not exist, the inner edge of the outer curved surface 20SR and the outer edge of the inner curved surface 20UR are continuous. The outer edge of the outer curved surface 20SR is continuous with the outer toilet bowl surface S. The inner edge of the inner curved surface 20UR is continuous with the central toilet bowl surface U.

[0022] As shown in Figures 1 and 2, the flushing water discharged from the spreader 100 spreads downward to both the left and right sides, flowing down the central toilet bowl surface U between each shelf surface 20 and the outer toilet bowl surfaces S on the left and right sides of each shelf surface 20. The flushing water that flows over the outer toilet bowl surfaces S reaches the shelf surface 20 between the upper end and the middle position. As shown in Figure 7, the flushing water that has flowed over the outer toilet bowl surfaces S and reached the shelf surface 20 forms a flow F1 that flows along the shelf surface 20 toward the lower front end of the toilet bowl section 10, and a flow F2 that flows down from the shelf surface 20 to the central toilet bowl surface U. The flushing water supplied to the spreader 100 is supplied at a water pressure within the set water pressure range specified for the urinal 1. The flushing water supplied to the spreader 100 at the minimum water pressure within the set water pressure range, and the flushing water discharged from the spreader 100, flows along the outermost left and right sides of the outer toilet bowl surfaces to reach the shelf surface 20, and the flow F3 reaches the arrival section X. The reaching point X is located approximately 2 / 5 of the way up the shelf surface 20 in the vertical direction from the upper end of the shelf surface 20, as viewed from the front.

[0023] In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR of the shelf surface 20 gradually decreases from the top end, as shown in UR1 and UR2 in Figures 6 and 7. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR of the shelf surface 20 gradually increases near the top of the reachable portion X, as shown in UR2 and UR3 in Figures 7 and 8. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR of the shelf surface 20 is approximately constant near the top and bottom of the reachable portion X, as shown in UR3 and UR4 in Figures 8 and 9. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR of the shelf surface 20 gradually increases from below the reachable portion X toward the lower end, as shown in UR5 and UR6 in Figures 10 and 11. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR of the shelf surface 20 is larger at the lower end of the shelf surface 20 than upstream of it. In the horizontal cross-sectional shape, as shown in Figures 10 and 11, at the lower part of the shelf surface 20, the radii of curvature UR5,UR6 of the inner curved surface 20UR are greater than the radii of curvature SR5,SR6 of the outer curved surface 20SR. The inner curved surface 20UR in one horizontal cross-sectional shape of the shelf surface 20 is not limited to having a constant radius of curvature. If the inner curved surface 20UR in one horizontal cross-sectional shape of the shelf surface 20 is a composite of multiple arcs having different radii of curvature, the radius of curvature of the inner curved surface 20UR is considered to be equal to the radius of curvature of a single arc having a constant radius of curvature that is closest to the actual shape of the inner curved surface 20UR.

[0024] In the horizontal cross-sectional shape, the radius of curvature of the outer curved surface 20SR of the shelf surface 20 gradually decreases from the top end, as shown in SR1, SR2, and SR3 in Figures 6 to 8, and remains approximately constant from above the reachable portion X to the reachable portion X. In the horizontal cross-sectional shape, the radius of curvature of the outer curved surface 20SR of the shelf surface 20 is slightly larger than that of the reachable portion X near the bottom of the reachable portion X, as shown in SR4 in Figure 9. In the horizontal cross-sectional shape, below the point where the radius of curvature of the outer curved surface 20SR is slightly larger near the bottom of the reachable portion X, the radius of curvature of the outer curved surface 20SR gradually decreases, and the radius of curvature of the outer curved surface 20SR at the bottom of the shelf surface 20 becomes approximately constant, as shown in SR5 and SR6 in Figures 10 and 11. The outer curved surface 20SR in one horizontal cross-sectional shape of the shelf surface 20 is not limited to having a constant radius of curvature. If the outer curved surface 20SR in one horizontal cross-sectional shape of the shelf surface 20 is a composite of multiple circular arcs having different radii of curvature, the radius of curvature of the outer curved surface 20SR is considered to be equal to the radius of curvature of a single circular arc having a constant radius of curvature that is closest to the actual shape of the outer curved surface 20SR.

[0025] In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR and the radius of curvature of the outer curved surface 20SR of the shelf surface 20 are smaller at the top of the shelf surface 20 than the radius of curvature of the outer curved surface 20SR, as shown in UR1, UR2, UR3, UR4, SR1, SR2, SR3, SR4 in Figures 6 to 9. In the horizontal cross-sectional shape near where the flat surface 20H of the shelf surface 20 disappears, the radius of curvature of the inner curved surface 20UR and the radius of curvature of the outer curved surface 20SR are approximately equal. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR and the radius of curvature of the outer curved surface 20SR of the shelf surface 20 are larger at the bottom of the shelf surface 20 than the radius of curvature of the outer curved surface 20SR, as shown in UR5, UR6, SR5, SR6 in Figures 10 and 12. Thus, in the horizontal cross-sectional shape, the relationship between the radius of curvature of the outer curved surface and the radius of curvature of the inner curved surface of the shelf surface is reversed from the top end to the bottom end of the shelf surface.

[0026] As described above, this urinal 1 is equipped with a toilet bowl section 10 having a pair of left and right shelf surfaces 20 that extend in the vertical direction. Each shelf surface 20 has a flat surface 20H that guides the flushing water to the lower front end. In the horizontal cross-sectional shape, the left-right width of the flat surface 20H of each shelf surface 20 of this urinal 1 changes between the upper and lower ends. In the horizontal cross-sectional shape, the left-right width H1, H2, H3, H4 of the flat surface 20H of each shelf surface 20 gradually decreases downwards. As a result, the flushing water discharged from the spreader 100, flowing over the outer toilet bowl surface and reaching the shelf surfaces 20 flows along the flat surface 20H of the shelf surfaces 20, and the flushing water that flows down to the central toilet bowl surface U does not separate, allowing the toilet bowl section 10 to be cleaned effectively.

[0027] The shelf surface 20 of this urinal 1 is comprised of an outer curved surface 20SR and an inner curved surface 20UR. In the horizontal cross-sectional shape of this urinal 1, the radius of curvature of the outer curved surface 20SR and the radius of curvature of the inner curved surface 20UR change. In the horizontal cross-sectional shape of this urinal 1, the radius of curvature UR6 of the inner curved surface 20UR at the lower end of the shelf surface 20 is larger than the radii of curvature UR1, UR2, UR3, UR4, UR5 of the inner curved surfaces 20UR above it. More specifically, this urinal 1 is provided in the toilet bowl section 10 above the shelf surface 20, and includes a spreader 100 to which a portion of the flushing water discharged flows along the outer toilet bowl surface S located to the left and right of the shelf surface 20 and reaches the shelf surface 20. The flushing water discharged from the spreader 100 and flowing to the outermost left and right of the outer toilet bowl surface S reaches the receiving section X of the shelf surface 20. In the horizontal cross-sectional shape, the inner curved surface 20UR gradually decreases from the upper end of the shelf surface 20 toward the reach X, becomes approximately constant above and below the reach X, and gradually increases from below the reach X toward the lower end. Thus, in the horizontal cross-sectional shape, because the radius of curvature of the inner curved surface 20UR of the shelf surface 20 is small up to the reach X, the cleaning water flows easily downward along the shelf surface 20. In the horizontal cross-sectional shape, because the radius of curvature of the inner curved surface 20UR of the shelf surface 20 gradually increases below the reach X, the cleaning water flows along the shelf surface 20, and the cleaning water that flows down from the shelf surface 20 toward the central toilet bowl surface U does not separate, allowing for effective cleaning of the toilet bowl 10.

[0028] In this urinal 1, in the horizontal cross-sectional shape, the radius of curvature of the outer curved surface 20SR near the lower part of the reach X of the shelf surface 20 is larger than the radius of curvature of the outer curved surface 20SR of the reach. Therefore, in this urinal 1, the flushing water flowing on the shelf surface 20 from above the reach X and the flushing water flowing on the outer toilet bowl surface S and reaching the reach X merge, suppressing the spreading flow F4 of the flushing water that spreads out to the left and right of the shelf surface 20 (see Figure 7), and guiding the flushing water toward the central toilet bowl surface U. Thus, in this urinal 1, the flushing water flows well over the shelf surface 20, and the central toilet bowl surface U of the toilet bowl section 10 can be well cleaned.

[0029] In this urinal 1, in the horizontal cross-sectional shape, the relationship between the radius of curvature of the inner curved surface 20UR and the radius of curvature of the outer curved surface 20SR of the shelf surface 20 is reversed from the upper end to the lower end of the shelf surface. Specifically, in this urinal 1, in the horizontal cross-sectional shape, the radius of curvature of the inner curved surface 20UR at the upper part of the shelf surface 20 is smaller than the radius of curvature of the outer curved surface 20SR at the upper part of the shelf surface 20, and the radius of curvature of the inner curved surface 20UR at the lower part of the shelf surface 20 is larger than the radius of curvature of the outer curved surface 20SR at the lower part of the shelf surface 20. Therefore, in this urinal 1, the flushing water that flows over the outer toilet bowl surface S and reaches the shelf surface 20 flows along the plane 20H of the shelf surface 20 and flows down to the inner toilet bowl surface. Thus, this urinal 1 can effectively flush the central toilet bowl surface U of the toilet bowl section 10.

[0030] This disclosure is not limited to Embodiment 1 described above in the description and drawings, but also includes, for example, the following embodiments within its technical scope. (1) In Embodiment 1, the horizontal cross-sectional shape showed that the left-right width of the shelf surface gradually decreased downwards. In contrast, there may be a portion where the left-right width remains constant. (2) In Embodiment 1, in the horizontal cross-sectional shape, the radius of curvature of the inner curved surface of the shelf surface had a portion where it gradually decreased and a portion where it gradually increased from the upper end to the reach. In contrast, the radius of curvature of the inner curved surface above the reach may be constant as long as it is smaller than the radius of curvature of the inner curved surface below the reach. (3) In Embodiment 1, the radius of curvature of the outer curved surface of the shelf surface changed in the horizontal cross-sectional shape. In contrast, the radius of curvature may be constant. (4) In Embodiment 1, the first region, which has a constant width from left to right on the shelf surface, extended from the upper end of the shelf surface to the vicinity of the reachable portion. Alternatively, it may extend from the upper end of the shelf surface to the center of the shelf surface in the vertical direction. (5) In Embodiment 1, in the horizontal cross-sectional shape, the distance from the virtual plane to the left and right central end of the plane was equal to the distance from the virtual plane to the left and right outer ends of the plane. In contrast, in the horizontal cross-sectional shape, the distance from the virtual plane to the left and right outer ends of the plane may be greater than the distance from the virtual plane to the left and right central end of the plane.

[0031] (6) In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface of each shelf surface may be as follows: In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface may be kept substantially constant from the upper end of the shelf surface to the vicinity of the reach. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface may be gradually increased near the upper and lower reaches of the reach. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface may be kept substantially constant below the reach. It may be gradually kept substantially constant near the upper and lower reaches. In the horizontal cross-sectional shape, the radius of curvature of the inner curved surface may be gradually increased downward from the portion where the flat surface of the end face disappears to the position corresponding to the cross-section shown in Figures 10 and 11 in Embodiment 1. (7) In Embodiment 1, the plane of each shelf surface extended downward from the upper end of the shelf surface and had a length of approximately 3 / 4 of the vertical length of the shelf surface. In contrast, a plane may exist in the entire area from the upper end to the lower end of the shelf surface. In this case, in the horizontal cross-sectional shape, the plane at the bottom of each shelf surface faces forward of the left-right center of the toilet bowl section. (8) In Embodiment 1, each shelf surface had an outer curved surface, an inner curved surface, and a flat surface. In contrast, each shelf surface may have only a flat surface, or one of the outer curved surface and the inner curved surface and a flat surface. (9) In Embodiment 1, a plane extends downward from the upper end of each shelf surface. Alternatively, the upper end of each shelf surface may be composed only of an outer curved surface and an inner curved surface. (10) In the horizontal cross-sectional shape, the shelf surface is such that the distance from the virtual plane to the left and right outer edges is greater than the distance from the virtual plane to the left and right central edges in the entire area from the top to the bottom. Alternatively, in the horizontal cross-sectional shape, at least a portion of the shelf surface may be such that the distance from the virtual plane to the left and right outer edges is equal to the distance from the virtual plane to the left and right central edges.

[0032] (11) The left-right width of each shelf surface may be as follows: The shelf surface may have a first region that extends downward from the upper end with a constant left-right width, a second region that extends downward from the lower end of the first region with a gradually decreasing left-right width, and a third region that extends downward from the lower end of the second region with a constant left-right width. The first region corresponds to the positions of the cross-sections shown in Figures 6 to 8 in Embodiment 1. Specifically, the first region extends from the upper end of the shelf surface to the vicinity of the reachable section. The second region is the position from the cross-section shown in Figure 8 in Embodiment 1 to the position where the planar surface of the shelf surface disappears. Specifically, the second region extends from the vicinity of the reachable section to the vicinity where the planar surface of the shelf surface disappears. (12) The width of each shelf surface may gradually decrease from the top edge to the bottom edge of the shelf surface, or it may decrease in stages.

[0033] (13) In the horizontal cross-sectional shape, the radius of curvature of the outer curved surface of each shelf surface may be as follows: In the horizontal cross-sectional shape, it may be substantially constant at the position corresponding to the cross-section shown in Figures 6 to 8 in Embodiment 1. It may be substantially constant from the position corresponding to the cross-section shown in Figure 9 in Embodiment 1 to the lower end. It may be substantially constant except below the reachable portion. [Explanation of symbols]

[0034] 10…bowl section, 20…shed surface, 20H…flat surface, 20SR…outer curved surface, 20UR…inner curved surface, 100…spreader (water outlet), S…outer bowl surface, U…central bowl surface, X…reaching section

Claims

1. The toilet bowl section has a shelf surface that guides the washing water downward to the front end, The aforementioned shelf surface has a plane that extends in the vertical direction, A urinal in which, in the horizontal cross-sectional shape when installed, the left-right width of the plane changes between the upper and lower ends.

2. It has a wall-mounting surface that abuts against the wall, In the constructed state, the wall-mounting surface of the wall surface is brought into contact with the wall, In the horizontal cross-sectional shape, the plane is such that, over the entire area from the upper end to the lower end of the shelf surface, the difference between the distance from the virtual plane coplanar with the wall surface to the left and right outer ends and the distance from the virtual plane to the left and right central ends changes with height, as described in claim 1.

3. The unit includes a water discharge section located above the shelf surface, which discharges the washing water such that a portion of the washing water flows over the outer toilet bowl surface located to the left and right of the shelf surface before reaching the shelf surface. In the horizontal cross-sectional shape, the urinal according to any one of claims 1 and 2, wherein the plane below the point where the flushing water that has flowed the furthest left and right outer edges on the outer toilet bowl surface reaches the shelf surface is greater than or equal to the distance from the virtual plane to the left and right outer edges than the distance from the virtual plane to the left and right central edges.

4. The shelf surface comprises an outer curved surface continuous with the outer toilet bowl surface located to the left and right of the shelf surface, and an inner curved surface continuous with the central toilet bowl surface located to the left and right of the shelf surface. The urinal according to any one of claims 1 to 3, wherein in the horizontal cross-sectional shape, at least one of the radius of curvature of the outer curved surface and the radius of curvature of the inner curved surface changes between the upper end and the lower end of the shelf surface.

5. The aforementioned shelf surface has an inner curved surface that is continuous with the central toilet bowl surface located to the left and right of the shelf surface, The urinal according to any one of claims 1 to 4, wherein in the horizontal cross-sectional shape, the radius of curvature of the inner curved surface at the lower end of the shelf surface is greater than the radius of curvature of the inner curved surface above the lower end of the shelf surface.

6. The unit includes a water discharge section located above the shelf surface, which discharges the washing water such that a portion of the washing water flows over the outer toilet bowl surface located to the left and right of the shelf surface before reaching the shelf surface. The shelf surface is provided with an outer curved surface that is continuous with the outer toilet bowl surface located to the left and right of the shelf surface, The urinal according to any one of claims 1 to 5, wherein, in the horizontal cross-sectional shape, the radius of curvature of the outer curved surface near the lower part of the receiving portion where the flushing water that has flowed the furthest left and right outermost on the outer toilet bowl surface reaches the shelf surface is larger than the radius of curvature of the outer curved surface of the receiving portion.

7. The urinal according to any one of claims 4 to 6, wherein in the horizontal cross-sectional shape, the shelf surface is such that the relationship between the radius of curvature of the outer curved surface and the radius of curvature of the inner curved surface is reversed between the upper end and the lower end of the shelf surface.

8. The urinal according to claim 7, wherein, in the horizontal cross-sectional shape, the radius of curvature of the inner curved surface at the upper part of the shelf surface is smaller than the radius of curvature of the outer curved surface at the upper part of the shelf surface, and the radius of curvature of the inner curved surface at the lower part of the shelf surface is larger than the radius of curvature of the outer curved surface at the lower part of the shelf surface.

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