JP2023102351A - toilet bowl - Google Patents

Abstract

To provide a toilet bowl that can thoroughly wash the inside of a recess part.SOLUTION: A toilet bowl 1 comprises an excreta bowl part 11 having a recess part 11C arranged at the lower end, and a washing water distribution pipe 12 that discharges washing water into the excreta bowl part 11. The washing water that is discharged from the washing water distribution pipe 12 and flows into the recess part 11 at the rear side rises at the front side of the recess part 11C reaching a level higher than the lowest point of an upper edge Te of the recess part 11C.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to toilet bowls.

Patent Literature 1 discloses a flush toilet in which flush water flowing into a recess from the front forms a vertical swirling flow within the recess.

Japanese Patent Application Laid-Open No. 2021-36128

The vertical swirl flow in Patent Document 1 is a flow that swirls in the left-right direction on the front side of the recess. For this reason, it is considered that the stirring action is poor on the rear side of the recess.

The present disclosure has been made in view of the above-described conventional circumstances, and aims to provide a toilet that can evenly clean the inside of the recess.

The toilet bowl of the first disclosure includes:
a toilet bowl portion having a recess provided at the lower end;
a water discharger that discharges cleansing water into the toilet bowl;
and
The wash water spouted from the water spouting portion and flowing into the recess from behind rises on the front side of the recess and reaches a position higher than the rear end of the upper edge of the recess.

The toilet bowl of the second disclosure includes:
a toilet bowl portion having a recess provided at the lower end;
a water discharger that discharges cleansing water into the toilet bowl;
and
the wash water spouted from the water spouting portion and flowing into the concave portion from behind rises on the front side of the concave portion;
In one flush of the toilet bowl, the flush water rising in front of the recess reaches a position higher than at least a part of the upper edge of the recess for at least half of the time for water to be spouted from the water spout.

1 is a side cross-sectional view of the toilet bowl of Embodiment 1. FIG. Fig. 2 is a perspective view of the toilet bowl of Embodiment 1 as seen from the upper front; Fig. 2 is a partially broken plan view of the toilet bowl of Embodiment 1; 4 is a cross-sectional view taken along line AA in FIG. 3; FIG. FIG. 4 is a partially broken plan view for explaining the action of the toilet bowl of Embodiment 1; It is a graph which shows an example of the change of the flow volume of a 1st main stream and a 2nd main stream. FIG. 4 is an enlarged plan view of a main part for explaining the operation of the toilet bowl of Embodiment 1; FIG. 4 is an enlarged side cross-sectional view of a main part for explaining the action of the toilet bowl of Embodiment 1; Fig. 10 is a plan view of a toilet in another embodiment;

<Embodiment 1>
A first embodiment embodying the toilet bowl of the present disclosure will be described below with reference to FIGS. 1 to 8. FIG.

As shown in FIGS. 1 to 3, the toilet bowl 1 of Embodiment 1 includes a toilet bowl portion 11, a water supply portion 13, and a washing water pipe 12 which is a water discharge portion. In the following description, the vertical direction is the vertical direction when the toilet bowl 1 is installed on a horizontal installation surface. Regarding the front-rear direction, when the toilet bowl 1 is installed on a horizontal installation surface, the direction in which the tank mounting portion 13B is provided with respect to the toilet bowl portion 11 is the rear side, and the opposite direction is the front side. The left-right direction is the left-right direction viewed from the front when the toilet bowl 1 is installed on a horizontal installation surface. 1 to 5, 7, and 8, the upward direction is the positive direction of the X-axis, the downward direction is the negative direction of the X-axis, the forward direction is the positive direction of the Z-axis, the backward direction is the negative direction of the Z-axis, the left direction is the positive direction of the Y-axis, and the right direction is the negative direction of the Y-axis.

<Structure of Toilet Bowl>
The toilet bowl portion 11 includes a rim portion 11A, a waste receiving surface 11B, and a recessed portion 11C. The rim portion 11</b>A forms the upper edge of the toilet bowl portion 11 . The rim portion 11A has a rim inner wall surface 11D. The rim inner wall surface 11D is formed to have an annular shape and rise. In plan view, the radius of curvature of the front end portion of the rim inner wall surface 11D is smaller than the radius of curvature of the rear end portion. In plan view, the rim inner wall surface 11D has a substantially elliptical shape. A rim spout 11E is formed on the left side of the rear end of the rim inner wall surface 11D (see FIG. 2). The rim spout 11E is elongated in the left-right direction (see FIG. 2).

The outer edge of the dirt receiving surface 11B is continuous with the lower end of the rim inner wall surface 11D via the outer connecting surface C1. The filth receiving surface 11B is formed in a mortar shape. The waste receiving surface 11B is formed so as to be inclined downward toward the central portion in the vertical direction and the central portion in the horizontal direction. The front end portion of the outer connecting surface C1 is composed of a plurality of different surfaces that are continuous in the front-rear direction. The radius of curvature R3 of the outer connecting surface C1 in a side cross section obtained by cutting the toilet bowl 1 vertically in the center in the horizontal direction is approximately 8 mm. The value of this radius of curvature R3 is obtained by assuming that a plurality of different surfaces extending in the front-rear direction are one curved surface.

The concave portion 11C is provided at the lower end portion of the toilet bowl portion 11, as shown in FIG. The concave portion 11C is formed so as to be depressed downward. The recessed portion 11C has a side wall surface 11F that rises in an annular shape, and a bottom wall surface 11G that continues from the lower end of the side wall surface 11F and forms the bottom of the recessed portion 11C. The side wall surface 11F is slightly slanted downward and inward. The curvature radius R1 of the upper end of the front end portion of the side wall surface 11F in plan view is approximately 28 mm (see FIG. 3). The curvature radius R1 may be 15 mm or more, more preferably 20 mm or more, and even more preferably 25 mm or more. A curvature radius R4 of the lower end of the front end portion of the side wall surface 11F in plan view is approximately 22 mm (see FIG. 3). Curvature radius R1 is larger than curvature radius R4. The upper edge Te of the side wall surface 11F is continuous with the inner peripheral edge of the contaminant receiving surface 11B via the inner connecting surface C2 over the entire circumference (see FIG. 3). The outer edge of the inner connecting surface C2 is continuous with the dirt receiving surface 11B extending outward. An inner connecting surface C2 extending upward and outward is continuous with the upper edge Te of the recess 11C. The curvature radius R2 of the front end portion of the inner connecting surface C2 in the vertical cross-sectional shape at the center in the left-right direction is approximately 12 mm. The radius of curvature R2 should be 20 mm or less, more preferably 15 mm or less. Curvature radius R2 is smaller than curvature radius R1. Curvature radius R2 is smaller than curvature radius R3. The vertical position of the upper edge Te of the side wall surface 11F gradually rises rearward from the front end Fe and abruptly lowers at the rear end. At the upper edge Te of the side wall surface 11F, the vertical position of the rear end Re is the lowest. An outflow port 11H is formed at the rear portion of the bottom wall surface 11G of the recess 11C. The bottom wall surface 11G is inclined slightly downward toward the outflow port 11H (that is, backward). The upstream end of the toilet drainage channel 11J is connected to the outflow port 11H. A reservoir R of cleaning water is formed in the concave portion 11C. A pooled water surface W of the pooled water portion R when no cleansing water is flowing into the concave portion 11C is located below the upper edge Te and above the bottom wall surface 11G, and is closer to the bottom wall surface 11G than the upper edge Te.

<Configuration of water supply unit>
The water supply part 13 is provided behind the toilet bowl part 11 . The water supply part 13 is for supplying washing water to the toilet bowl part 11 and is adjacent to the rear of the upper end part of the toilet bowl part 11 . A water supply space 13A is formed in the water supply section 13 . The water supply space 13A and the toilet bowl portion 11 are continuously communicated through the rim spout 11E (see FIG. 3). A tank mounting portion 13B for mounting a cleaning tank (not shown) is provided at the rear portion of the water supply portion 13 .

<Configuration of washing water pipe>
The washing water pipe 12, which is the water discharge part, is arranged in the water supply space 13A. The washing water pipe 12 spouts washing water toward the toilet bowl portion 11 from the washing tank placed on the tank mounting portion 13B. As shown in FIG. 3, the washing water pipe 12 has a tubular first water discharger 12A and a tubular second water discharger 12B. The first water discharger 12A and the second water discharger 12B are bifurcated.

The first water discharger 12A is arranged on the right side of the water supply space 13A so as to extend in the front-rear direction. A front end portion of the first water discharging portion 12A is formed to be bent leftward. The tip of the bent front end of the first water discharger 12A is arranged on the left side of the water supply space 13A. A first water discharge port 12C for discharging cleansing water is formed to open at the front end of the first water discharger 12A.

The second water discharger 12B is arranged on the left side of the water supply space 13A so as to extend in the front-rear direction. A second water discharge port 12D for discharging cleansing water is formed to open at the front end of the second water discharger 12B. In plan view, the first water outlet 12C and the second water outlet 12D are open toward the front left. In plan view, the opening direction of the second water outlet 12D is more forward than that of the first water outlet 12C. In plan view, the first water outlet 12C and the second water outlet 12D are located behind the rim water outlet 11E. In plan view, the first water outlet 12C is arranged forward of the second water outlet 12D. In plan view, the first water outlet 12C and the second water outlet 12D are arranged on the left side of the water supply space 13A.

As shown in FIG. 4, the first water outlet 12C and the second water outlet 12D are arranged side by side in the left-right direction. The lower end of the first water outlet 12C and the lower end of the second water outlet 12D have different positions in the height direction. Specifically, the lower end of the first water outlet 12C is arranged at a position lower than the lower end of the second water outlet 12D.

<How flush water flows in the toilet bowl>
The washing water is stored in advance in an amount sufficient to wash the toilet bowl 11 once in a washing tank (not shown). For example, when an operation unit (not shown) provided in the cleaning tank is operated to start one toilet cleaning, water is discharged from each of the first water outlet 12C and the second water outlet 12D toward the toilet bowl 11 as shown in FIG.

The wash water spouted from the first water spout 12C and the wash water spouted from the second water spout 12D flow so as to cross each other on the dirt receiving surface 11B located in front of the rim spout 11E. Specifically, the wash water spouted from the first water spout 12C passes through the rim spout 11E, flows to the dirt receiving surface 11B, and forms a first mainstream F1 that flows counterclockwise along the rim inner wall surface 11D. That is, the first water outlet 12C spouts the first mainstream F1. The wash water spouted from the first water spout 12C includes a flow F11 that does not form the first main flow F1 and directly flows down toward the recess 11C.

The wash water spouted from the second water spout 12D forms a second mainstream F2 that passes through the rim spout 11E, passes through the dirt receiving surface 11B, and flows in a bundle toward the recess 11C. That is, the second water outlet 12D spouts the second mainstream F2. The wash water spouted from the second water spout 12D also includes a flow F21 that does not form the second main flow F2 and swirls counterclockwise along the rim inner wall surface 11D.

The lower end of the first water outlet 12C is positioned lower than the lower end of the second water outlet 12D (see FIG. 4). Therefore, the second main flow F2 discharged from the second water discharge port 12D is discharged to a position higher than the first main flow F1 discharged from the first water discharge port 12C, and flows so as to cover the first main flow F1 on the dirt receiving surface 11B positioned in front of the rim water discharge port 11E. At this time (that is, before flowing into the recess 11C), part of the second main flow F2 forms a flow F22 that joins the first main flow F1, and flows counterclockwise along the rim inner wall surface 11D.

The amount of water in the second main stream F2 joining the first main stream F1 (that is, the amount of water in the flow F22) is 50% or less of the amount of water in the second main stream F2 spouted from the second water outlet 12D. The second main flow F2 flowing above the first main flow F1 does not join the first main flow F1, flows above the first main flow F1 toward the recess 11C, and directly flows into the recess 11C. In this way, before flowing into the recessed portion 11C in the toilet bowl portion 11, the first main flow F1 and the second main flow F2 flow at different positions in the vertical direction at the portion where the first main flow F1 and the second main flow F2 intersect and overlap.

After crossing the second mainstream F2, the first mainstream F1 flows forward on the left dirt receiving surface 11B, collides with the front end part of the rim inner wall surface 11D, changes its flow direction to the rear right, and flows backward on the right dirt receiving surface 11B. A part of the first mainstream F1 flowing backward on the right dirt receiving surface 11B forms a flow F12 toward the recess 11C and flows into the recess 11C at a position behind the front end of the recess 11C. In other words, the flow F12, which is part of the first main flow F1 that flows backward on the right dirt receiving surface 11B, flows into the recess 11C from the right front.

The second main flow F2 after crossing the first main flow F1 (that is, the second main flow F2 that does not join the first main flow F1) flows forward on the left dirt receiving surface 11B and flows into the recess 11C at a position forward of the rear end of the recess 11C. In other words, the second mainstream F2 flowing forward on the left dirt receiving surface 11B flows into the recess 11C from the left rear. That is, the first mainstream F1 that turns along the rim inner wall surface 11D and flows backward on the dirt receiving surface 11B, and the second mainstream F2 that flows forward on the dirt receiving surface 11B flow into the recess 11C from a position overlapping the recess 11C in the front-rear direction. The cleansing water discharged from the cleansing water pipe 12 (water discharge portion) forms at least two flows, a first main flow F1 and a second main flow F2, and flows into the concave portion 11C.

The first mainstream F1 (that is, the first mainstream F1 excluding the flow F12) that flows backward on the right dirt receiving surface 11B and does not flow into the recess 11C reaches the rear end of the dirt receiving surface 11B. The first mainstream F1 that has reached the rear end of the dirt receiving surface 11B collides with the rear end of the rim inner wall surface 11D, and changes its direction of flow forward and leftward. The first main flow F1, which has changed its direction of flow forward and leftward, gradually approaches from the right to join the second main flow F2, which does not join the first main flow F1, and flows into the concave portion 11C.

The angle θ between the first mainstream F1 that turns along the rim inner wall surface 11D, reaches the rear end of the dirt receiving surface 11B, flows forward on the dirt receiving surface 11B, and the second mainstream F2 that flows forward on the dirt receiving surface 11B is 20 degrees or less in plan view. Thus, the first mainstream F1 and the second mainstream F2 join at 20 degrees or less and flow into the recess 11C.

As shown in FIG. 6, the flow rate of the first mainstream F1 and the flow rate of the second mainstream F2 sharply increase when water spouting is started (time T0), are maintained at a predetermined flow rate for a while, and then gradually decrease. Flow rate means the amount of fluid that passes per unit time at any given location. In one flush of the toilet bowl, the time for spouting water from the flushing water pipe 12 (spraying portion) is the time t1 between the time T0 when water spouting starts (hereinafter also simply referred to as time T0) and the time when water spouting ends T2 (hereinafter simply referred to as time T2). Time T1 is the time when the flow rate of the first mainstream F1 and the flow rate of the second mainstream F2 become the same.

Between time T0 and time T1, the flow rate of the first mainstream F1 is greater than the flow rate of the second mainstream F2. Between the time T1 and the time T2, the flow rate of the first mainstream F1 is less than the flow rate of the second mainstream F2. Time t0 from time T0 to time T1 is longer than time t2 from time T1 to time T2. That is, in one flush of the toilet bowl, the flow rate of the first mainstream F1 is higher than the flow rate of the second mainstream F2 for at least half of the time during which water is spouted from the flushing water pipe 12 (water spouting portion).

<Washing water flow in recessed portions>
The second main flow F2 that does not join the first main flow F1 is bundled from the rear left and flows into the recess 11C, and turns in the recess 11C in the vertical direction. Specifically, as shown in FIGS. 7 and 8, the second mainstream F2 that has flowed into the recess 11C from the left rear rises along the bottom wall surface 11G and the side wall surface 11F on the front side of the recess 11C. Along with this, the second mainstream F2 turns vertically to become a downward flow again behind the recess 11C, passes through the outlet 11H, and flows into the toilet drainage channel 11J.

The second mainstream F2, which rises on the front side of the recess 11C, reaches a position higher than the rear end Re of the upper edge Te of the side wall surface 11F of the recess 11C (that is, higher than the lowest). Specifically, the second main flow F2 that has risen on the front side of the recess 11C reaches a position higher than the upper edge Te of the recess 11C in more than half of the entire circumference of the upper edge Te of the side wall surface 11F of the recess 11C (the dotted line section in FIG. 7). Furthermore, the highest position P reached by the second main flow F2 on the front side of the recess 11C is higher than the position N on the upper edge Te of the recess 11C closest to this position P (see FIGS. 7 and 8).

The second mainstream F2, which rises in front of the recess 11C, forms a bundle, descends backward, passes through the right side of the outflow port 11H, and flows into the toilet drainage channel 11J. The bundled second mainstream F2 descends and passes through the right side of the outlet 11H (see FIG. 7). Therefore, the amount of washing water per unit time passing through the outlet 11H is larger on the right side of the outlet 11H than on the left side of the outlet 11H. At this time, the second main stream F2 descending backward passes through the outlet 11H toward the downstream side so as to occupy 2/3 or more of the area of the outlet 11H (see FIG. 7).

In one toilet flush, the flush water rising in front of the recess 11C reaches a position higher than at least a part of the upper edge Te of the side wall surface 11F of the recess 11C for at least half of the time when the water is spouted from the flush water pipe 12. In this way, the second main flow F2 rising in front of the recess 11C is located on the right side of the recess 11C and flows into the recess 11C in a bundle from the left rear of the recess 11C.

According to the embodiment configured as described above, the following effects are obtained.

The toilet bowl 1 includes a toilet bowl portion 11 having a concave portion 11</b>C provided at the lower end thereof, and a flushing water pipe 12 for discharging flushing water into the toilet bowl portion 11 . The second main flow F2 spouted from the washing water pipe 12 and flowing into the recess 11C from behind rises on the front side of the recess 11C and reaches a position higher than the lowest position of the upper edge Te of the recess 11C. According to this configuration, the second main flow F2 that has flowed into the recess 11C from the rear rises on the front side of the recess 11C and reaches a position higher than the lowest position of the upper edge Te of the recess 11C. Therefore, it is possible to satisfactorily agitate waste at least in a region lower than the lowest position of the upper edge Te of the recess 11C.

The toilet bowl 1 includes a toilet bowl portion 11 having a concave portion 11</b>C provided at the lower end thereof, and a flushing water pipe 12 for discharging flushing water into the toilet bowl portion 11 . The second main flow F2 discharged from the washing water pipe 12 and flowing into the recess 11C from behind rises in front of the recess 11C. In one toilet flush, the second main flow F2 rising in front of the recess 11C reaches a position higher than at least part of the upper edge Te of the recess 11C for at least half of the time during which water is spouted from the flushing water pipe 12. According to this configuration, the time for which the washing water flows vertically in the recess 11C is at least half of the time for one discharge of water from the washing water pipe 12. Therefore, it is possible to secure the time for stirring the waste in the recess 11C, thereby facilitating the discharge of the waste.

In the toilet bowl 1, the second mainstream F2 that has flowed into the recess 11C from behind rises on the front side of the recess 11C and reaches a position higher than the rear end Re of the upper edge Te of the recess 11C. According to this configuration, the second main flow F2 that has flowed into the recess 11C from the rear rises on the front side of the recess 11C, so that the washing water evenly flows over the entire front-rear direction of the recess 11C, and the waste can be well agitated and easily discharged from the recess 11C.

The highest position P reached by the second main flow F2 on the front side of the recess 11C is a position higher than the position N on the upper edge Te of the recess 11C closest to this position P. According to this configuration, it is possible to increase the momentum of the second main flow F2, so that it is possible to better agitate the waste in the recess 11C.

The second main flow F2 that has risen on the front side of the recess 11C reaches a position higher than the upper edge Te of the recess 11C in more than half of the entire circumference of the upper edge Te of the recess 11C. According to this configuration, the momentum of the washing water flowing in the vertical direction in the recess 11C can be increased, so that the action of stirring the waste in the recess 11C can be strengthened.

In one toilet flush, the second main flow F2 rising in front of the recess 11C reaches a position higher than at least part of the upper edge Te of the recess 11C for at least half of the time during which water is spouted from the flushing water pipe 12. According to this configuration, by setting the time for the washing water to flow vertically in the recess 11C to be at least half of the time for one discharge of water from the washing water pipe 12, it is possible to secure the time for stirring the waste in the recess 11C, thereby facilitating the discharge of the waste.

The recess 11C has a bottom wall surface 11G with an outlet 11H formed thereon, and the second main flow F2 rising in front of the recess 11C descends and passes downstream so as to occupy two-thirds or more of the area of the outlet 11H. According to this configuration, the waste stirred in the recess 11C can be pushed into the outflow port 11H, thereby facilitating the discharge of the waste.

The amount of washing water per unit time passing through the outlet 11H is larger on the right side of the outlet 11H than on the left side of the outlet 11H. According to this configuration, it is possible to complicate the flow of washing water in the recess 11C, so that the effect of stirring the dirt in the recess 11C can be enhanced.

The second main flow F2 rising on the front side of the recess 11C is located on the right side of the recess 11C, and the second main flow F2 flows into the recess 11C from the left rear of the recess 11C in a bundle. According to this configuration, since the washing water flows so as to cross the recess 11C in the left-right direction, it is possible to suppress unevenness in the effect of agitating the waste on the left and right sides of the recess 11C.

The second mainstream F2 rising on the front side of the recess 11C rises on the front side of the recess 11C. According to this configuration, it is possible to cause the washing water to move in the front-rear direction inside the recess 11C, so that it is possible to suppress unevenness in the effect of stirring the waste in the front and back of the recess 11C.

The curvature radius R1 of the upper end of the front end portion of the concave portion 11C in plan view is 15 mm or more. According to this configuration, when cleaning the front end portion of the concave portion 11C, the front end portion of the concave portion 11C can be easily brought into contact with the cleaning tool, so cleaning can be facilitated.

The upper edge Te of the recessed portion 11C is continuous with the inner connecting surface C2 extending upward and outward. According to this configuration, by setting the curvature radius R2 to 20 mm or less (that is, making it smaller), the height of the side wall surface 11F of the recessed portion 11C can be increased, and the area for stirring the waste can be enlarged, so the waste can be stirred better.

The curvature radius R2 of the front end portion of the inner connecting surface C2 in the vertical cross-sectional shape at the center in the left-right direction is smaller than the curvature radius R1 of the upper end of the front end portion of the recess 11C in plan view. According to this configuration, when cleaning the front end of the recess 11C, it is possible to easily bring the cleaning tool into contact with the front end of the recess 11C, and by setting the curvature radius R2 to 20 mm or less (that is, making it smaller), the height of the side wall surface 11F of the recess 11C can be increased, the area for stirring the dirt can be increased, and the dirt can be stirred better.

The outer edge of the inner connecting surface C2 is continuous with the dirt receiving surface 11B that spreads outward, and the outer edge of the dirt receiving surface 11B is continuous with the rim inner wall surface 11D rising through the outer connecting surface C1. According to this configuration, when cleaning the rim inner wall surface 11D and the dirt receiving surface 11B, it is possible to easily bring the cleaning tool into contact with the outer connecting surface C1, thereby facilitating cleaning. In addition, by setting the curvature radius R2 to 20 mm or less (that is, making it smaller), the height of the side wall surface 11F of the recessed portion 11C can be increased, the area for stirring dirt can be increased, and the dirt can be stirred better.

<Other embodiments>
The present disclosure is not limited to the disclosure of Embodiment 1 explained by the above description and drawings, and includes, for example, the following embodiments.
(1) Unlike the first embodiment, two or more rim spouts may be provided. For example, a configuration is conceivable in which the first main stream is discharged from one rim water outlet and the second main stream is discharged from the other rim water outlet.
(2) The position of the rim spout is not limited to that of the first embodiment. The direction in which flush water is discharged from the rim spout and the direction in which the flush water is swirled in the toilet bowl are not limited. Therefore, the second main stream rising in front of the recess may be positioned on the left side of the recess and flow into the recess in a bundle from the rear on the right side of the recess. In other words, the wash water that rises in front of the recess is positioned on one of the left and right sides of the recess, and this wash water may flow into the recess in a bundle from the rear of the other left and right sides of the recess.
(3) Different from the first embodiment, the second main flow that rises on the front side of the recess may reach a position higher than the upper edge of the recess over 3/4 or more of the entire circumference of the upper edge of the recess. Further, the second main stream that has risen on the front side of the recess may reach a position higher than the upper edge of the recess over the entire circumference of the upper edge of the recess.
(4) As shown in FIG. 9, a rim spout may be formed in a region H on the front side of the center in the front-rear direction of the rim inner wall surface 11D and on the right side of the center in the left-right direction. In this case, the wash water spouted from the rim spout flows backward on the right dirt receiving surface 11B.

1 Toilet bowl 11 Toilet bowl 11A Rim 11B Dirt receiving surface 11C Recess 11D Rim inner wall surface 11G Bottom wall surface 11H Outlet 12 Cleansing water pipe (discharge) C1 Outer connection surface C2 Inner connection surface F2 Second main stream (wash water flowing into recess from behind) (wash water rising in front of recess) R1 Front end of recess in plan view R2: Curvature radius of the front end of the inner connecting surface in the vertical cross-sectional shape of the center in the left-right direction R3: Curvature radius of the front end of the outer connecting surface in the vertical cross-sectional shape of the center in the left-right direction Te: Upper edge of the recess

Claims (14)

a toilet bowl portion having a recess provided at the lower end;
a water discharger that discharges cleansing water into the toilet bowl;
and
The flushing water spouted from the water spouting portion and flowing into the recess from behind rises on the front side of the recess and reaches a position higher than the lowest position of the upper edge of the recess. 2. The toilet bowl according to claim 1, wherein the flush water that has flowed into the recess from behind rises on the front side of the recess and reaches a position higher than the rear end of the upper edge of the recess. The toilet bowl according to any one of claims 1 to 2, wherein the highest position on the front side of the recess that the flush water reaches is a position higher than the upper edge of the recess that is closest to this position. 4. The toilet bowl according to any one of claims 1 to 3, wherein the flush water that rises on the front side of the recess reaches a position higher than the upper edge of the recess in half or more of the entire circumference of the upper edge of the recess. 5. The toilet bowl according to any one of claims 1 to 4, wherein the flush water rising in front of the recess reaches a position higher than at least a part of the upper edge of the recess for at least half of the time during which the water is spouted from the spout in one flush. a toilet bowl portion having a recess provided at the lower end;
a water discharger that discharges cleansing water into the toilet bowl;
and
the wash water spouted from the water spouting portion and flowing into the concave portion from behind rises on the front side of the concave portion;
The flushing water rising in front of the concave portion reaches a position higher than at least a part of the upper edge of the concave portion for at least half of the time of water spouting from the water spouting portion in one flush of the toilet bowl. The recess has a bottom wall surface with an outlet,
The toilet bowl according to any one of claims 1 to 6, wherein the flush water that has risen in front of the recess descends and passes downstream so as to occupy two-thirds or more of the area of the outflow port. The toilet bowl according to claim 7, wherein the amount of flush water passing through the outlet per unit time is larger on the right side of the outlet than on the left side of the outlet. the washing water rising on the front side of the recess is located on one of the left and right sides of the recess,
The toilet bowl according to any one of claims 1 to 8, wherein the flush water flows into the recess from the rear of the other left and right sides of the recess in a bundle. 10. The toilet bowl according to any one of claims 1 to 9, wherein the flush water that rises on the front side of the recess rises on the front side of the recess. The toilet bowl according to any one of claims 1 to 10, wherein the curvature radius of the upper end of the front end portion of the concave portion in plan view is 15 mm or more. An inner connecting surface extending upward and outward is continuous with the upper edge of the recess,
12. The toilet bowl according to claim 11, wherein the curvature radius of the front end portion of the inner connecting surface in the vertical cross-sectional shape in the center in the left-right direction is 20 mm or less. 13. The toilet bowl according to claim 12, wherein the radius of curvature of the front end portion of the inner connecting surface in the vertical cross-sectional shape of the center in the left-right direction is smaller than the radius of curvature of the upper end of the front end portion of the recess in plan view. The outer edge of the inner connecting surface is continuous with the outwardly expanding waste receiving surface,
The outer edge of the dirt receiving surface is continuous with the inner wall surface of the rim rising through the outer connecting surface,
14. The toilet bowl according to any one of claims 12 to 13, wherein the curvature radius of the front end portion of the inner connecting surface in the center vertical cross-sectional shape in the left-right direction is smaller than the curvature radius of the front end portion of the outer connecting surface in the center vertical cross-sectional shape in the left-right direction.

Images