WO2021131858A1

WO2021131858A1 - Flush toilet

Info

Publication number: WO2021131858A1
Application number: PCT/JP2020/046558
Authority: WO
Inventors: 佐藤　靖史
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2019-12-24
Filing date: 2020-12-14
Publication date: 2021-07-01
Also published as: EP4083340A4; JP2021102852A; EP4083340A1; JP7352798B2; CN114746613A

Abstract

The present invention addresses the problem of providing a flush toilet with which it is possible to prevent water from splashing in a backflow prevention unit. The flush toilet comprises a bowl, a spout that supplies water to the bowl, a water supply path (3) that supplies the water supplied from a water source to the spout, and a backflow prevention unit (4) that prevents backflow of water in the water supply path (3). The backflow prevention unit (4) has an inlet (410) connecting to the spout, a water receiving wall (5) partially provided with the inlet (410), and an outlet (400) located away from the inlet (410) and the water receiving wall (5) and configured to discharge the water sent from the water source toward the inlet (410). The part of the water receiving wall (5) below the inlet (410) is provided with a water adhesion prevention unit (9) that prevents water from adhering to a lower end surface (520) of the water receiving wall (5).

Description

Flush toilet

The present disclosure relates to a flush toilet, and more particularly to a flush toilet provided with a backflow suppression unit in a water supply channel for supplying water to a bowl.

Patent Document 1 describes a flush toilet provided with a backflow suppression unit in a water supply channel that supplies water to a bowl. The backflow suppression unit has a water inlet that leads to a water outlet provided in the bowl and a water outlet that discharges water sent from the water supply source toward the water inlet, and the water inlet is the water that comes out of the water outlet. It is arranged on the trajectory of.

In this flush toilet, part of the water that comes out of the water outlet is received by the wall around the water inlet and falls along this wall. At this time, a certain amount of water may adhere to the lower end surface of the wall due to surface tension.

In such a state, if the pressure of the water discharged from the outlet is lower than the predetermined value, the water discharged from the outlet collides with the water adhering to the lower end surface of the wall, and the adhering water suppresses the backflow. There is a risk of scattering to the outside of the water receiving part located below the part.

International Publication No. 2019/0999666

It is an object of the present disclosure to propose a flush toilet that can suppress the scattering of water in the backflow suppression section.

A flush toilet according to the present disclosure includes a bowl that receives filth, a spout that supplies water to the bowl, a water supply channel that supplies water supplied from a water supply source to the spout, and the water supply channel. It is provided with a backflow suppression unit that suppresses the backflow of water in the water supply channel. The backflow suppression unit is located away from the water inlet leading to the water spout, the water receiving wall provided with the water inlet partially, the water inlet and the water receiving wall, and is sent from the water supply source. It has a water outlet that discharges the water to the water inlet. A water adhesion suppressing portion for suppressing water from adhering to the lower end surface of the water receiving wall is provided in a portion of the water receiving wall below the water inlet.

FIG. 1 is a perspective view showing a flush toilet according to an embodiment of the present disclosure. FIG. 2 is a perspective view showing a backflow suppressing portion and a bowl provided in the flush toilet of the same. FIG. 3 is a perspective view showing the periphery of the same backflow suppression portion. FIG. 4A is a cross-sectional view taken along the vertical surface showing the periphery of the backflow suppressing portion as above, and FIG. 4B is a side view showing a main part of the backflow suppressing portion as above. FIG. 5A is a side view showing a modified example 1 of the main part of the backflow suppressing portion of the above, and FIG. 5B is a side view showing a modified example 2 of the main part of the backflow suppressing portion of the same. FIG. 5C is a side view showing a modified example 3 of the main part of the backflow suppressing portion of the same as above, and FIG. 5D is a side view showing a modified example 4 of the main part of the backflow suppressing portion of the same.

1. 1. Overview FIG. 1 shows a flush toilet 1 of an embodiment. The flush toilet 1 is provided in a bowl 23 that receives filth, a spout 253 that supplies water to the bowl 23, a water supply channel 3 that supplies water supplied from a water supply source to the spout 253, and a water supply channel 3. A backflow suppressing unit 4 for suppressing the backflow of water in the water supply channel 3 is provided. The backflow suppression unit 4 is located away from the water inlet 410 leading to the water outlet 253, the water receiving wall 5 in which the water inlet 410 is partially provided, the water inlet 410 and the water receiving wall 5, and is sent from the water supply source. It has a water outlet 400, which discharges the collected water toward the water inlet 410. As shown in FIGS. 4A and 4B, a water adhesion suppressing portion 9 for suppressing water from adhering to the lower end surface 520 of the water receiving wall 5 is provided in a portion of the water receiving wall 5 below the water inlet 410. It is provided.

In the flush toilet 1 of one embodiment having the above configuration, when a part of the water discharged from the water outlet 400 toward the water inlet 410 is received by the water receiving wall 5, this water is under the water receiving wall 5. The water adhesion suppressing unit 9 can suppress the adhesion to the end surface 520 due to surface tension. Therefore, in the flush toilet 1 of one embodiment, the water discharged from the water outlet 400 toward the water inlet 410 collides with the water adhering to the lower end surface 520 of the water receiving wall 5 and adheres to the lower end surface 520. It is possible to suppress the scattering of the water. Therefore, in the flush toilet 1 of one embodiment, it is possible to suppress the scattering of water in the backflow suppressing unit 4.

2. Details Subsequently, the flush toilet 1 of the present embodiment shown in FIGS. 1 to 4 will be described in more detail. The flush toilet 1 is installed in the toilet room 7 as shown in FIG. A water supply pipe 71 as a water supply source is provided on the rear wall 74 of the toilet room 7, and a water stopcock 72 is provided at the downstream end of the water supply pipe 71. Further, a drain pipe 73 connected to a sewer pipe is provided on the floor 75 of the toilet room 7.

When the flush toilet 1 is installed in the toilet room 7, the connection portion 6 connected to the water supply channel 3 is connected to the water stop valve 72 via the pipe 61, and the drain trap 76 connected to the drain pipe 232 of the bowl 23 drains. It is connected to the pipe 73. By communicating the water stopcock 72 and the connection portion 6, water from the water supply pipe 71 (that is, the water supply source) is supplied to the water supply channel 3 of the flush toilet 1.

The flush toilet 1 includes a toilet body 2, a water supply channel 3, and a backflow suppression unit 4. Hereinafter, in FIG. 1, the direction from the flush toilet 1 toward the rear wall 74 of the toilet room 7 and along the horizontal plane is defined as the rear, and the opposite direction is defined as the front. Further, the left-right direction is defined with reference to the user who faces the rear in front of the flush toilet 1.

The toilet bowl body 2 is the main body of the flush toilet bowl 1. The toilet body 2 includes a plurality of outer parts 21, an inner part 22, a water receiving portion 8 (see FIG. 2), a toilet seat (not shown), and a toilet lid 26.

The plurality of outer parts 21 are the outer shells of the flush toilet 1. The outer part 21 is attached to a frame (not shown). In the present embodiment, the outer part 21 includes a skirt 211 that supports the inner part 22, a rear lower part 213 that is located behind the skirt 211, and a rear upper part 212 that is located above the rear lower part 213. .. The toilet seat and the toilet lid 26 are attached to the rear upper part 212 so as to be rotatable about an axis parallel to the left-right direction.

The inner part 22 is arranged inside the portion surrounded by the outer part 21 and the toilet lid 26. The inner part 22 is supported by the upper end of the skirt 211. As shown in FIG. 2, the inner part 22 includes a bowl 23, a discharge portion 25, and a support portion 24.

Bowl 23 receives filth excreted by the user. The bowl 23 is formed in a bowl shape. The upper end of the bowl 23 has an opening surface. The lower end of the bowl 23 has a drainage cylinder 232. The inner surface of the bowl 23 (hereinafter, may be referred to as the bowl surface 231) is inclined downward toward the front end portion of the drainage cylinder 232. The water discharged from the discharge unit 25 swirls around the axis parallel to the vertical direction along the bowl surface 231. As shown in FIG. 1, the rear end portion of the drainage pipe 232 is connected to the drainage pipe 73 via the drainage trap 76.

The drain trap 76 prevents odors, pests, etc. from flowing back from the drain pipe 73 onto the bowl 23. The drain trap 76 is an S-shaped trap that is an S-shaped pipe, a movable trap, or the like. The movable trap is, for example, a flexible pipe connected to the drainage pipe 232 of the bowl 23. The tip of the flexible tube is switched between a state of facing upward and a state of facing downward by a motor or the like.

The discharge unit 25 supplies water to the bowl surface 231. The discharge portion 25 is adjacent to the opening surface of the bowl 23. The discharge unit 25 includes a discharge nozzle 251, a pair of rising portions 252, and a water discharge port 253.

The discharge nozzle 251 is a nozzle that discharges water supplied from the water supply channel 3. The discharge nozzle 251 is arranged between the pair of rising portions 252. The pair of rising portions 252 guide the water discharged from the discharge nozzle 251 so that the water swirls along the bowl surface 231. The spout 253 supplies water to the bowl 23. In the present embodiment, the spout 253 is an opening surface surrounded by a front end portion of the rising portion 252 inside the bowl 23 and a part of the rising portion 252 outside the bowl 23 facing the front end portion. The water discharge port 253 may be an opening at the tip of the discharge nozzle 251.

The support portion 24 extends outward from the outer edge of the opening surface of the bowl 23. The support portion 24 is supported by the upper end portion of the skirt 211. The bowl 23 and the discharge portion 25 are fixed to the outer part 21 via the support portion 24.

The water supply channel 3 supplies the water supplied from the water supply source to the discharge unit 25. The upstream end of the water supply channel 3 is connected to the connecting portion 6, and the downstream end of the water supply channel 3 is connected to the discharge nozzle 251. The water supply channel 3 is provided with a water stop valve (not shown) and a constant flow rate valve (not shown) so that a constant flow rate of water can flow. As a result, even if the water pressure of the water supplied from the water supply source fluctuates to some extent, a constant flow rate of water can be supplied from the spout 253 to the bowl 23.

The water supply channel 3 is provided with a backflow suppression unit 4. The backflow suppression unit 4 suppresses the backflow of water in the water supply channel 3. As a result, in the unlikely event that the liquid level of the pooled water or the like in the bowl 23 rises and the discharge unit 25 is immersed in the pooled water or the like, the pooled water or the like in the bowl 23 flows back to the water supply source through the water supply channel 3. It can be suppressed.

As shown in FIGS. 3, 4A and 4B, the backflow suppressing unit 4 includes a water outlet pipe 40, a water inlet pipe 41, a water receiving wall 5, a scattering suppressing unit 42, and a covering wall 43.

The water outlet pipe 40 is a pipe that leads to a water supply source (that is, a water supply pipe 71) and discharges water sent from the water supply source toward the water inlet pipe 41. The water discharge pipe 40 is a pipe that puts water into the backflow suppression unit 4. The downstream end face of the water pipe 40 has a water outlet 400. The water outlet 400 is an opening through which water passes through the water pipe 40, and the water sent from the water supply source is discharged toward the water inlet 410. The water discharge pipe 40 is supported by a support portion 80 protruding upward from the water receiving portion 8. The central axis 401 of the water pipe 40 is along the horizontal plane and is orthogonal to the vertical line (in other words, the vertical plane). The inner peripheral surface 402 at the end of the water outlet 40 on the water outlet 400 side is formed in a tapered shape so that the cross-sectional area of the flow path becomes smaller as the portion closer to the outlet 400. Thereby, the flow velocity of the water discharged from the water outlet 400 can be increased.

The water inlet pipe 41 is a pipe that receives the water discharged from the water outlet 400 and flows the water to the discharge nozzle 251 (see FIG. 2). The upstream end of the water inlet pipe 41 is connected to the water receiving wall 5. The downstream end of the water inlet pipe 41 is connected to the discharge nozzle 251 via a hose or the like.

The upstream end face of the water inlet pipe 41 has a water inlet 410. The water inlet 410 is provided in a part of the water receiving wall 5. Specifically, the water inlet 410 is provided on a part of the surface (that is, the right surface) of the water receiving wall 5 on the water outlet 400 side.

The water inlet 410 leads to the water outlet 253. The central axis 411 of the water inlet pipe 41 is along the horizontal plane and is located on an extension line of the central axis 401 of the water outlet pipe 40. That is, the water inlet 410 is arranged on the locus of water having a water pressure equal to or higher than a predetermined value coming out of the water outlet 400. The water inlet 410 is inclined with respect to the central axis 411 of the water pipe 41. The inclination of the opening surface of the water inlet 410 is inclined with respect to the horizontal plane so that the portion closer to the water outlet 400 is located lower in the left-right direction (in other words, the direction along the water trajectory). Therefore, even if the locus of the water discharged from the water outlet 400 draws a parabola, the water can be easily received at the water inlet 410.

The water receiving wall 5 is continuous with the upper wall portion 50 parallel to the vertical plane and the lower end of the upper wall portion 50, and is inclined so that the lower portion is located on the right side (that is, the water outlet 400 side). It has a wall portion 51 and a lower wall portion 52 that is continuous with the lower end of the intermediate wall portion 51 and parallel to the vertical plane.

A water inlet 410 is provided at the center of the intermediate wall portion 51 in the front-rear direction. The angle of inclination of the intermediate wall portion 51 with respect to the vertical surface is the same as the angle of inclination of the opening surface of the water inlet 410 with respect to the vertical surface.

As shown in FIG. 4B, the water receiving wall 5 has a semicircular shape when viewed from the right side. A third covering wall 432 of the covering wall 43, which will be described later, is connected to the outer peripheral portion of the water receiving wall 5 except for the lower end surface 520.

A water adhesion suppressing portion 9 for suppressing the adhesion of water to the lower end surface 520 of the water receiving wall 5 is provided in a portion of the water receiving wall 5 below the water inlet 410. In the present embodiment, the water adhesion suppressing portion 9 is a protruding portion 90 protruding from the lower wall portion 52 of the water receiving wall 5 to the water outlet 400 side (that is, the right side). The upper surface of the protrusion 90 is an inclined surface inclined with respect to the horizontal plane.

In the present embodiment, the protruding portion 90 has a rectangular plate shape. The protrusion 90 is tilted so as to be located downward toward the front portion. The protrusion 90 has a length in the front-rear direction longer than a length in the left-right direction. The upper surface of the protrusion 90 is a flat surface and is inclined downward (that is, the front portion is located downward).

The front and rear ends of the protrusion 90 are located away from the third covering wall 432. The water received by the water receiving wall 5 flows forward along the upper surface of the protruding portion 90 and concentrates on the front end portion of the upper surface of the protruding portion 90, so that the water easily falls from the protruding portion 90 due to its own weight. , Water is suppressed from adhering to the lower end surface 520 of the water receiving wall 5 due to surface tension.

The scattering suppression unit 42 suppresses the scattered water from adhering to the water outlet 400 when the water discharged from the water outlet 400 enters the water inlet 410. The scattering suppression unit 42 is arranged between the water outlet 400 and the water inlet 410. The scattering suppression unit 42 has a first impermeable plate 44 and a second impermeable plate 45.

The first impermeable plate 44 faces the water receiving wall 5 and the water inlet 410, and receives the water scattered from the water receiving wall 5. The first impermeable plate 44 is located away from the water receiving wall 5, and an opening 46 is provided between the lower end of the first impermeable plate 44 and the lower end of the water receiving wall 5. The water received by the water receiving wall 5 or the first impermeable plate 44 falls to the water receiving portion 8 through the opening 46.

The first impermeable plate 44 is along the vertical plane and intersects (orthogonally in this embodiment) the

central axes

401 and 411 of the water inlet pipe 41 and the water outlet pipe 40. The first impermeable plate 44 is formed with a first water passage hole 440 that penetrates the first impermeable plate 44. The diameter of the first water passage hole 440 is formed to be equal to or larger than the diameter of the water outlet 400 and equal to or smaller than the diameter of the water inlet 410.

The second impermeable plate 45 faces the water outlet 400 and the first impermeable plate 44. The second impermeable plate 45 is the first of the first impermeable plate 44, which comes out of the water outlet 400 and bounces off the first impermeable plate 44 and scatters, and the second impermeable plate 45 comes out of the outlet 400 and bounces off the water receiving wall 5. Receives water that has passed through the water passage 440. The second impermeable plate 45 is along the vertical plane and intersects (orthogonally in this embodiment) the

central axes

411 and 401 of the water inlet pipe 41 and the water outlet pipe 40. That is, the second impermeable plate 45 is parallel to the first impermeable plate 44. The second impermeable plate 45 is formed with a second water passage hole 450 that penetrates the second impermeable plate 45. The diameter of the second water passage hole 450 is formed to be equal to or larger than the diameter of the water outlet 400 and equal to or smaller than the diameter of the water inlet 410. The diameter of the second water passage hole 450 is the same as the diameter of the first water passage hole 440, but may be smaller or larger than the diameter of the first water passage hole 440.

A peripheral wall portion 47 is formed around each of the first water passage hole 440 and the second water passage hole 450. The peripheral wall portion 47 projects from at least a part of the periphery of the water passage holes 440 and 450 to at least one of the left and right directions (in other words, the water outlet 400 side and the water inlet 410 side in the direction along the water trajectory). To do. In the present embodiment, the peripheral wall portion 47 corresponding to the first water passage hole 440 projects from the entire circumference around the first water passage hole 440 to both the right side and the left side. Further, the peripheral wall portion 47 corresponding to the second water passage hole 450 projects only to the right side from the entire circumference around the second water passage hole 450.

However, the peripheral wall portion 47 corresponding to the first water passage hole 440 may protrude only to the left side or only to the right side from the entire circumference around the first water passage hole 440. Further, the peripheral wall portion 47 corresponding to the second water passage hole 450 may project only to the left side or both left and right sides from the entire circumference around the second water passage hole 450. Further, the peripheral wall portion 47 may be formed only in a part around the water passage holes 440 and 450.

When the water from the water outlet 400 enters the water inlet 410, the water that bounces off the water receiving wall 5 and scatters on the first impermeable plate 44 hits the peripheral wall portion 47 and falls downward. Further, even if the water flows through the first impermeable plate 44, it does not enter the first water passage hole 440 due to the peripheral wall portion 47. As a result, it is possible to prevent the water that has come out of the water outlet 400 and bounced off the water receiving wall 5 from passing through the first water passage hole 440 and flowing back to the water outlet 400 side.

The covering wall 43 suppresses the water discharged from the water outlet 400 from rebounding at the water receiving wall 5 and the scattering suppressing portion 42 and scattering to the outside of the covering wall 43. The covering wall 43 includes a first covering wall 430, a second covering wall 431, and a third covering wall 432.

The first covering wall 430 connects the tip (left end) of the water discharge pipe 40 and the second impermeable plate 45. The first covering wall 430 covers the space between the water discharge pipe 40 and the second impermeable plate 45 from the front-rear direction, the upper side, and the right side. The second covering wall 431 connects the second impermeable plate 45 and the tip (right end) of the peripheral wall portion 47 protruding to the right from the first water passage hole 440. The space between the second impermeable plate 45 and the second impermeable plate 45 and the peripheral wall portion 47 is covered from the front-rear direction, the upper side, and the left side. The third covering wall 432 connects the first impermeable plate 44 and the water receiving wall 5. The third covering wall 432 covers the space between the first impermeable plate 44 and the water receiving wall 5 from the front-rear direction and from above.

In the present embodiment, the third covering wall 432 has a first portion 432a projecting to the left from the first impermeable plate 44 and a second portion 432b projecting to the right from the outer peripheral portion of the water receiving wall 5.

The first covering wall 430 is provided integrally with the water pipe 40. The first portion 432a of the third covering wall 432, the first impermeable plate 44, the second covering wall 431, and the second impermeable plate 45 are integrally provided. The second portion 432b of the third covering wall 432 and the water receiving wall 5 are integrally provided.

The second portion 432b of the third covering wall 432, the first covering wall 430, and the first portion 432a of the third covering wall 432 are each provided with mounting portions 48 projecting forward and backward.

The front and rear mounting portions 48 are mounted on the support portion 80 protruding upward from the water receiving portion 8. As a result, the backflow suppressing portion 4 is mounted on the water receiving portion 8. The water receiving portion 8 is supported by the frame of the toilet bowl main body 2 and is covered by the rear upper part 212 (see FIG. 1).

The water bounced off the covering wall 43, the scattering suppression portion 42, or the water receiving wall 5 is received by the water receiving portion 8. A drain hole 81 is provided at the bottom of the water receiving portion 8. A pipe 82 such as a tube is connected to the drain hole 81. The pipe 82 is connected to, for example, the bowl 23. Therefore, the water received by the water receiving unit 8 flows into the bowl 23. However, the pipe 82 may be connected to, for example, a drain trap 76, a drain pipe 73, or the like. Further, the water received by the water receiving unit 8 may be directly discharged to the floor 75 (see FIG. 1) of the toilet room 7. The water receiving portion 8 has a peripheral wall 83. As shown in FIG. 3, the backflow suppression unit 4 is arranged inside the peripheral wall 83 in a plan view.

The flush toilet 1 has an overflow portion 84 provided inside the peripheral wall 83 in a plan view. The overflow portion 84 has a cylindrical shape, and protrudes upward from the inner portion of the peripheral wall 83 on the bottom surface of the water receiving portion 8. The overflow portion 84 has an overflow opening 840 at its upper end. The overflow opening 840 is located above the bottom surface of the water receiving portion 8 and below the upper end of the peripheral wall 83. The overflow opening 840 discharges the water accumulated in the peripheral wall 83 when the drainage capacity is insufficient only by the drainage hole 81 of the water receiving portion 8.

The water that has entered the overflow opening 840 is flushed to the floor 75 (see FIG. 1). The water that has entered the overflow opening 840 may flow into the bowl 23, the drain trap 76, the drain pipe 73, or the like.

3. 3. Action effect The flush toilet 1 of the present embodiment described above operates as follows when water is supplied to the bowl 23.

That is, when water is supplied from the water supply pipe 71, which is a water supply source, to the water outlet pipe 40, water is discharged from the water outlet 400 of the water outlet pipe 40 toward the water inlet 410.

The water discharged from the water outlet 400 passes through the water passage holes 450 and 440 of the

impermeable plates

45 and 44 and enters the water inlet 410. At this time, a part of the water discharged from the water outlet 400 may be received by the water receiving wall 5.

The water received by the water receiving wall 5 flows down along the surface of the water receiving wall 5 (specifically, the surface facing the right side) and reaches the upper surface of the protrusion 90. The water on the upper surface of the protrusion 90 flows to the front side along the upper surface of the protrusion 90, concentrates on the front end of the upper surface of the protrusion 90, and falls due to its own weight. The water that has fallen from the front end of the upper surface of the protrusion 90 is received by the water receiving portion 8 and discharged through the drain hole 81.

As a result, in the flush toilet 1 of the present embodiment, it is possible to prevent water from adhering to the lower end surface 520 of the water receiving wall 5 due to surface tension. Therefore, in the flush toilet 1 of the present embodiment, when the pressure of the water discharged from the water outlet 400 is lower than a predetermined value, the water discharged from the water outlet 400 collides with the water adhering to the lower end surface 520 and adheres. Problems such as water scattering to the outside of the peripheral wall 83 of the water receiving portion 8 are unlikely to occur.

Further, in the flush toilet 1 of the present embodiment, the protruding portion 90 functions as an eave because the protruding portion 90 projects from the lower wall portion 52 below the water receiving wall 5 toward the water outlet 400. As a result, the protrusion 90 can prevent the water discharged from the water outlet 400 from reaching the lower end surface 520 of the water receiving wall 5.

Further, in the flush toilet 1 of the present embodiment, the protruding portion 90 is located over the entire remaining portion excluding the front and rear ends of the lower wall portion 52 of the water receiving wall 5, so that the protruding portion 90 travels along the surface of the water receiving wall 5. It is also easy to prevent water from reaching the lower end surface 520.

4. Modification Example Next, a modification of the flush toilet 1 of the above-described embodiment will be described. The modifications described below can be combined as appropriate.

The water adhesion suppressing portion 9 is not limited to the structure shown in FIG. 4B as long as it can suppress the adhesion of water to the lower end surface 520 of the water receiving wall 5 due to surface tension.

For example, the water adhesion suppressing portion 9 may have two inclined surfaces in which the upper surface of the protruding portion 90 is inclined with respect to the horizontal plane, as in the modified example 1 shown in FIG. 5A. In the first modification, the upper surface of the protruding portion 90 has an apex in a part in the front-rear direction. On the upper surface of the protruding portion 90, a portion on the front side of the apex is an inclined surface descending forward, and a portion rearward from the apex is an inclined surface descending backward.

Further, the water adhesion suppressing portion 9 may be two protruding portions 91 and 92 protruding from the lower wall portion 52 toward the water outlet 400 side as in the modified example 2 shown in FIG. 5B. The two protrusions 91 and 92 are located at intervals in the front-rear direction. The upper surface of the protrusion 91 on the front side is an inclined surface inclined backward downward with respect to the horizontal plane. The upper surface of the protrusion 92 on the rear side is an inclined surface that is inclined forward downward with respect to the horizontal plane. In the second modification, the water adhering to the surface of the water receiving wall 5 easily concentrates and falls between the two protrusions 91 and 92 along the upper surfaces of the two protrusions 91 and 92.

Further, the water adhesion suppressing portion 9 may be a lower end surface 520 of the water receiving wall 5 that is inclined with respect to the horizontal plane, as in the modified example 3 shown in FIG. 5C. In the third modification, the lower end surface 520 of the water receiving wall 5 is inclined so as to be located downward toward the front portion. Therefore, the water received by the water receiving wall 5 and reaching the lower end surface 520 of the water receiving wall 5 flows forward along the lower end surface 520 and tends to concentrate on the front end portion of the lower end surface 520 and fall.

Further, the water adhesion suppressing portion 9 may be a water repellent surface 93 provided on the water receiving wall 5 as in the modified example 4 shown in FIG. 5D. In the modified example 4, the water-repellent surface 93 is provided on the surface (specifically, the surface facing the right side) of the lower wall portion 52 of the water receiving wall 5. A water-repellent surface 93 may also be provided on the lower end surface 520 of the water receiving wall 5. The water-repellent surface 93 is formed by a well-known appropriate means. For example, when molding the water receiving wall 5, the water repellent surface 93 can be formed by providing fine irregularities on the surface of the lower wall portion 52. Further, the water-repellent surface 93 may be formed by applying a paint having a water-repellent effect to the surface of the lower wall portion 52, attaching a sheet having a water-repellent effect, or the like.

Further, the water adhesion suppressing section 9 of one embodiment shown in FIG. 4B and the water adhesion suppressing section 9 of the modifications 1 to 4 shown in FIGS. 5A to 5D can be appropriately combined.

The protruding

portions

90, 91, 92 may have an upper surface inclined with respect to the horizontal plane, and the shape thereof is not limited to a plate shape.

Further, the projecting

portions

90, 91, 92 may have an upper surface inclined with respect to the horizontal plane, and the upper surface of the projecting portion 90 is not limited to lowering forward or downward, but downwards downward to the right (more specifically, close to the water outlet 400). It may be inclined so that the portion is located downward. Similarly, the lower end surface 520 of the water receiving wall 5 is not limited to the front lowering, but may be the rear lowering, the right lowering, or the left lowering.

Further, the upper surface of the protruding

portions

90, 91, 92 is not limited to a flat surface, and may be a surface having a step. The upper surface of the

protrusions

90, 91, 92 is provided so that water adhering to the upper surface of the

protrusions

90, 91, 92 flows toward the lower end of the upper surface of the

protrusions

90, 91, 92. Just do it. Similarly, the lower end surface 520 of the water receiving wall 5 is not limited to a flat surface, and may be a surface having a step.

The center lines of the opening surface of the water inlet 410 and the opening surface of the water outlet 400 were located on a straight line, but the present invention is not limited to this. When the water discharged from the outlet 400 draws a parabola, the inlet 410 may be located on this parabola.

5. Summary As in the above-described embodiment and its modifications, the flush toilet (1) of the first aspect has the following configuration.

That is, in the flush toilet (1) of the first aspect, the bowl (23) that receives the filth, the spout (253) that supplies water to the bowl (23), and the spout (253) that supplies the water supplied from the water supply source. ) Is provided with a water supply channel (3). The flush toilet (1) of the first aspect is further provided in the water supply channel (3), and includes a backflow suppressing unit (4) that suppresses the backflow of water in the water supply channel (3). The backflow suppression unit (4) receives the water inlet (410) leading to the spout (253), the water receiving wall (5) partially provided with the water inlet (410), and the water sent from the water supply source. It has a water outlet (400) that exits toward the water inlet (410). The water outlet (400) is located away from the water inlet (410) and the water receiving wall (5). A water adhesion suppressing portion (9) that suppresses water from adhering to the lower end surface (520) of the water receiving wall (5) in a portion of the water receiving wall (5) below the water inlet (410). Is provided.

In the flush toilet (1) of the first aspect having the above configuration, when a part of the water discharged from the water outlet (400) is received by the water receiving wall (5), this water is received by the water receiving wall (5). Adhesion to the lower end surface (520) of the water can be suppressed by the water adhesion suppressing portion (9). Therefore, in the flush toilet (1) of the first aspect, the water discharged from the water outlet (400) collides with the water adhering to the lower end surface (520) of the water receiving wall (5), and the adhering water collides with the water adhering to the lower end surface (520) of the water receiving wall (5). Can be suppressed from scattering. Therefore, in the flush toilet (1) of the first aspect, it is possible to suppress the scattering of water in the backflow suppressing unit (4).

Further, as in the above-described embodiment and its modification, the flush toilet (1) of the second aspect additionally includes the following configuration in addition to the configuration of the flush toilet (1) of the first aspect.

That is, in the flush toilet (1) of the second aspect, the water adhesion suppressing portion (9) is a protruding portion (90) protruding from the water receiving wall (5) toward the water outlet (400). The upper surface of the protrusion (90) is an inclined surface inclined with respect to the horizontal plane.

In the flush toilet (1) of the second aspect having the above configuration, the water receiving wall (5) receives the water receiving wall (5) by the inclined upper surface of the protruding portion (90) protruding from the water receiving wall (5) toward the water outlet (400). The water can be concentrated on the lower end of the upper surface of the protrusion (90). Therefore, in the flush toilet (1) of the second aspect, it is easy to drop the water received by the water receiving wall (5).

Further, as in the above-described embodiment and its modification, the flush toilet (1) of the third aspect additionally includes the following configuration in addition to the configuration of the flush toilet (1) of the second aspect.

That is, in the flush toilet (1) of the third aspect, the backflow suppressing portion (4) further has a covering wall (43) provided so as to cover the periphery of the water receiving wall (5). The protrusion (90) is located away from the covering wall (43).

In the flush toilet (1) of the third aspect having the above configuration, the water discharged from the water outlet (400) toward the water inlet (410) and hitting the water receiving wall (5) is discharged from the water receiving wall (5). Scattering to the outside can be prevented by the covering wall (43). In addition, in the flush toilet (1) of the third aspect, the water traveling on the upper surface of the protrusion (90) can be dropped from between the protrusion (90) and the covering wall (43), so that the covering wall (90) can be dropped. 43) does not interfere with the fall of water from the protrusion (90).

Further, as in the above-described embodiment and its modification, the flush toilet (1) of the fourth aspect has the following configuration in addition to the configuration of the flush toilet (1) of any one of the first to third aspects. It has an additional configuration.

That is, in the flush toilet (1) of the fourth aspect, the water adhesion suppressing portion (9) is the lower end surface (520) of the water receiving wall (5) that is inclined with respect to the horizontal plane.

In the flush toilet (1) of the fourth aspect having the above configuration, the water received by the water receiving wall (5) and reaches the lower end surface (520) of the water receiving wall (5) is received by the inclination of the lower end surface (520). It can be concentrated on the lower part of the lower end surface (520) and can be easily dropped.

Further, as in the above-described embodiment and its modification, the flush toilet (1) of the fifth aspect is the following configuration in addition to the configuration of the flush toilet (1) of any one of the first to fourth aspects. It has an additional configuration.

That is, in the flush toilet (1) of the fifth aspect, the water adhesion suppressing portion (9) is a water-repellent surface (93) provided on the water receiving wall (5).

In the flush toilet (1) of the fifth aspect having the above configuration, the water received by the water receiving wall (5) is easily dropped by the water repellent surface (93).

Although the present disclosure has been described above based on the embodiments shown in the accompanying drawings, the present disclosure is not limited to each of the above embodiments, and appropriate design changes can be made within the scope of the present disclosure. It is possible.

1 Flush toilet 23 Bowl 253 Water spout 3 Water supply channel 4 Backflow suppression part 400 Water outlet 410 Water inlet 5 Water receiving wall 520 Lower end surface 43 Covering wall 9 Water adhesion suppressing part 90 Protruding part 93 Water repellent surface

Claims

A bowl that receives filth and
A spout that supplies water to the bowl and
A water supply channel that supplies water supplied from a water supply source to the spout, and
A backflow suppressing unit provided in the water supply channel and suppressing the backflow of water in the water supply channel,
With
The backflow suppression unit
The water inlet leading to the water spout and
A water receiving wall with a part of the water inlet and
A water outlet located away from the water inlet and the water receiving wall, and a water outlet that discharges water sent from the water supply source toward the water inlet.
Have,
A water adhesion suppressing portion for suppressing water from adhering to the lower end surface of the water receiving wall is provided in a portion of the water receiving wall below the water inlet.
Flush toilet.
The water adhesion suppressing portion is a protruding portion protruding from the water receiving wall toward the water outlet side.
The upper surface of the protrusion is an inclined surface inclined with respect to the horizontal plane.
The flush toilet according to claim 1.
The backflow suppressing portion further has a covering wall provided so as to cover the periphery of the water receiving wall.
The protrusion is located away from the covering wall.
The flush toilet according to claim 2.
The water adhesion suppressing portion is the lower end surface of the water receiving wall that is inclined with respect to the horizontal plane.
The flush toilet according to any one of claims 1 to 3.
The water adhesion suppressing portion is a water-repellent surface provided on the water receiving wall.
The flush toilet according to any one of claims 1 to 4.