WO2018131439A1

WO2018131439A1 - Flush toilet

Info

Publication number: WO2018131439A1
Application number: PCT/JP2017/046285
Authority: WO
Inventors: 拓河津; 芳郎本所; 悠黒木
Original assignee: 株式会社Ｌｉｘｉｌ
Priority date: 2017-01-10
Filing date: 2017-12-25
Publication date: 2018-07-19

Abstract

Provided is a flush toilet with which it is possible to satisfactorily discharge waste and the like while satisfactorily washing a wider area on the surface of a toilet bowl.　This flush toilet (1) is equipped with a toilet bowl (10) having: a water discharge port (11A) that discharges wash water; a wash shelf (12) that is formed on the inner top part of the toilet bowl (10), and on which wash water discharged from the water discharge port (11A) flows; an upright surface (11) that stands upright and is continuous with the outer peripheral edge of the wash shelf (12); and a projecting section (11B) that is connected with the wash shelf (12), and projects upward.

Description

Flush toilet

The present invention relates to a flush toilet.

Patent Document 1 discloses a conventional flush toilet. This flush toilet is a nozzle (nozzle) for supplying flush water forward from the side of the bowl portion almost horizontally along the inner surface of the bowl portion (toilet bowl portion) just below the rim of the toilet bowl. ) Is installed. In addition, a shelf (cleaning shelf) for guiding the cleaning water discharged from the nozzle to the entire circumference of the bowl portion is provided at a position slightly below the height at which the nozzle of the bowl portion is attached, and above the shelf A rim shape that covers the shelf is formed. Further, this flush toilet is configured such that the width of the rim between the outer shape of the toilet bowl and the shape of the inner surface of the bowl increases as it goes forward from the side.

In this flush toilet, the curvature of the front part of the bowl inner surface shape is reduced, and the washing water is transmitted smoothly, so that even when the pressure of the water supply source is low, the washing water flows to the rear end of the bowl. The bowl can be washed. Moreover, since the curvature of the front part of the inner surface of the bowl of this flush toilet is reduced, the centrifugal force of the washing water is reduced, and the washing water can be prevented from jumping out and splashing out of the bowl at the front part of the bowl.

JP 2002-294842 A

For example, in order to make it easy for the user to visually recognize the entire inside of the bowl part, when the shelf is not covered by the rim shape, if the momentum of the washing water discharged to the bowl is increased, the washing water may jump out of the bowl part. Since there is a risk of splashing, it is not possible to increase the momentum at which the cleaning water is discharged into the bowl portion. In this case, the washing water that has reached the downstream shelf through which the washing water flows has less momentum to flow than immediately after being discharged from the nozzle. For this reason, it is difficult for washing water to flow on the surface of the rising surface of the rim located at the end portion on the downstream side of the shelf. However, by adopting a configuration in which the shelf is not covered with the rim shape, it becomes easier for the user to visually recognize the rising surface of the rim. Therefore, it is desirable to clean the surface of the rising surface of the rim with cleaning water.
Moreover, the flush toilet bowl of patent document 1 is wash | cleaning with the wash water which flows down a bowl part from a shelf. The amount of water that flows down from the shelf varies depending on the circumferential position of the shelf. For this reason, in this flush toilet bowl, there is a possibility that the washing water will not flow in the bowl part without any spots. That is, this flush toilet bowl may not be able to wash the bowl part evenly.
Moreover, the flush toilet of Patent Document 1 is formed so that the shelf width is substantially symmetrical in a plan view as viewed from above. The washing water flowing through the shelf differs in the momentum and amount of the washing water between the upstream side and the downstream side of the shelf. For this reason, in this flush toilet bowl, there is a possibility that the momentum and amount of washing water flowing down to the bowl portion are different between the upstream side and the downstream side of the shelf. That is, this flush toilet bowl may not be able to wash the bowl part evenly.
In the flush toilet of Patent Document 1, the amount of washing water flowing on the shelf decreases from the upstream side to the downstream side where the washing water flows. Thereby, in the bowl part located in the downstream where the washing water flows, there is a possibility that an area where the washing water flows and an area where the washing water does not flow are formed. That is, this flush toilet bowl may not be able to wash the bowl portion located on the downstream side of the shelf evenly.
Further, in the flush toilet of Patent Document 1, the wash water flowing down from the shelf flows down while swirling the surface of the bowl portion, whereby a swirling flow is formed in the lower portion of the bowl portion. The swirling flow thus formed is difficult to flow downward. That is, it is difficult for the swirling flow to flow into the drainage channel. Thereby, there exists a possibility that this flush toilet bowl cannot discharge | emit waste etc. favorably.

The present invention has been made in view of the above-described conventional situation, and provides a flush toilet that can efficiently discharge filth and the like while washing a wider range of the surface of the toilet bowl. This is a problem to be solved.

The flush toilet of the first invention is
A spout for discharging wash water,
A washing shelf formed on the inner upper part of the toilet bowl, through which washing water discharged from the water outlet flows,
An elevation that rises continuously on the outer periphery of the cleaning shelf;
Connected to the cleaning shelf and the elevation surface, and a bulging portion that swells upward;
It is characterized by having a stool portion having a stool.

In this flush toilet, when the washing water flowing through the washing shelf flows into the bulging portion connected to the washing shelf and the elevation surface, the washing water rides on the bulging portion and flows. For this reason, this flush toilet can wash | clean the standing surface which stands | starts up continuously at the outer periphery of a washing shelf with washing water even if it is a field where washing water does not flow easily. That is, this flush toilet bowl can wash the elevation located above the washing shelf.

Therefore, the flush toilet according to the first aspect of the present invention can clean a wider range of the surface of the toilet bowl.

The flush toilet of the second invention is
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
Wash water discharged from the water outlet flows down the bowl surface and flows into the concave portion from the front of the concave portion, collides with the bottom surface and flows toward the rear upper side of the concave portion, and
A second main flow that flows down the rear portion of the bowl surface and flows into the concave portion from behind the concave portion is formed.

This flush toilet can raise the position of the surface of the wash water in the recess, and can wash a wider area of the recess.

The flush toilet of the third invention is
A spout for discharging wash water,
A washing shelf that is formed on the inside upper part of the toilet bowl along the upper edge of the toilet bowl, and in which the wash water discharged from the water outlet flows,
It has a toilet bowl with
The shelf width of the washing shelf located on the upstream side of the wash water that is discharged from the water outlet and flows through the washing shelf when viewed from the front of the toilet bowl portion is the front of the toilet bowl portion. It is the other side of right and left seeing from the side, It is larger than the shelf width of the said washing shelf located in the downstream of the washing water which is discharged from the said water outlet and flows through the said washing shelf.

This flush toilet ensures the amount of water required for washing the washing shelf located downstream by increasing the width of the washing shelf located upstream from the width of the washing shelf located downstream. be able to. Thereby, this flush toilet bowl can also flush water into the washing shelf located on the downstream side.

The flush toilet of the fourth invention is
A spout for discharging wash water,
A washing shelf formed on the inner upper part of the toilet bowl, through which washing water discharged from the water outlet flows,
It has a toilet bowl with
The rear of the washing shelf and the shelf width of the washing shelf located on the upstream side of the rear left and right center of the toilet bowl, and / or the left and right sides when viewed from the front of the toilet bowl, The shelf width of the downstream end of the wash shelf located on the downstream side of the wash water discharged from the water outlet and flowing through the wash shelf is one of the left and right sides as seen from the front of the toilet bowl, It is smaller than the shelf width of the washing shelf at the center in the front-rear direction of the toilet bowl located on the downstream side of the washing water discharged from the water outlet and flowing through the washing shelf.

This flush toilet bowl is a washing shelf located on the downstream side, and when it flows from the washing shelf at the center in the front-rear direction of the toilet bowl toward the rear side, the inside of the washing shelf located on the downstream side The flowing wash water flows down toward the center of the toilet bowl. Then, this wash water flows toward the rear left and right center of the toilet bowl while flowing down toward the center of the toilet bowl. Thereby, since wash water can be poured into the back side right and left center part of a toilet bowl part, the back side right and left center part of a toilet bowl part can be wash | cleaned with wash water.

Therefore, the flush toilet of the second to fourth inventions can well clean the surface of the toilet bowl.

The flush toilet of the fifth invention is
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
The toilet bowl is characterized in that the left and right sides of the toilet bowl portion are steeper than the other side of the left and right sides when viewed from the front of the toilet bowl portion.

This flush toilet can increase the momentum flowing downward in the wash water flowing down the upper end of the bowl surface with a steep slope. As a result, the washing water flowing down the upper end of the bowl surface with a steep slope increases the water force flowing into the recess from the left and right sides, stirs the washing water and filth etc. in the recess, Can be discharged satisfactorily.

The flush toilet of the sixth invention is
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
In the cross-sectional shape in the horizontal direction, the rear part of the bowl surface on one side of the left and right sides as viewed from the front of the toilet bowl part is a first concave surface that is recessed outward, and a third convex surface that protrudes inward on the front side from the first concave surface. It is characterized by having.

In this flush toilet, for example, when the wash water discharged from the spout flows through the first concave surface and the third convex surface, the wash water flows from the left and right sides of the rear portion of the bowl surface by the first concave surface and the third convex surface. The direction of flowing toward the recess can be adjusted. As a result, the flush toilet can cause the washing water to flow down to a desired position in the recess, stir the washing water, dirt, etc. in the recess, and discharge the dirt, etc., to the drainage channel.

Therefore, the flush toilet of the fifth and sixth inventions can discharge filth and the like satisfactorily while washing the surface of the toilet bowl.

It is a top view of the flush toilet bowl of Example 1. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a cross-sectional view taken along the line BB in FIG. FIG. 3 is a sectional view taken along the line CC in FIG. 1. FIG. 2 is a sectional view taken along the line DD in FIG. 1. FIG. 2 is a cross-sectional view taken along line EE in FIG. 1. FIG. 5 is a cross-sectional view taken along line FF in FIG. 2. FIG. 3 is a cross-sectional view taken along line GG in FIG. 2. It is a top view which shows the flow of the washing water in the toilet bowl part of the flush toilet bowl of Example 1. FIG. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 showing the flow of washing water of the flush toilet of Example 1.

A preferred embodiment of the present invention will be described.

The swollen portion of the flush toilet of the first invention can be formed in the front region or the rear region where the curvature of the elevation is large in a plan view of the toilet bowl viewed from above. In this case, since this flush toilet bowl has a large centrifugal force related to the wash water flowing in the position where the bulge portion is provided, the wash water rides on the surface of the bulge portion and easily flows. For this reason, this flush toilet bowl can wash | clean the surface of a bulging part favorably.

The swollen portion of the flush toilet of the first invention can be formed in the front region or the rear region on the downstream side of the wash water that is discharged from the spout and flows through the wash shelf in the front region or the rear region. In this case, in this flush toilet, in either the front region or the rear region on the downstream side, the momentum through which the washing water flows is smaller than the washing water immediately after being discharged from the water outlet. For this reason, this flush toilet bowl can wash | clean an upright surface by flushing water on the surface of a bulging part in either the front part area | region or rear part area | region of a downstream.

The swelled portion of the flush toilet of the first invention can be formed with a curved surface that is recessed obliquely outward and downward. In this case, the flush toilet can flow into the bulging portion with a small resistance, and the momentum of the washing water is unlikely to decrease, so the washing water rides on the surface of the bulging portion and the surface of the bulging portion is excellent. Can flow into.

The bulging portion of the flush toilet of the first invention has a shape in which the upper edge gradually increases from the upstream end toward the central portion and from the central portion toward the downstream end in the shape seen in the horizontal direction from the inside of the toilet bowl portion. Can be gradually lowered. In this case, the flush toilet can flow the washing water on the surface of the bulging portion and around the bulging portion without being disturbed.

The flush toilet of the second invention can flow into the recess from the rear or side of the recess and turn laterally within the recess to form a second main flow that merges with the first main flow. In this case, the flush toilet can increase the momentum of the swirling flow formed in the recess when the second main flow merges with the first main flow in the recess. Thereby, since the position of the surface of the cleaning water in the recess can be further increased, a wider range of the recess can be cleaned.

The dimension in the front-rear direction of the inlet of the flush toilet of the second invention can be smaller than half of the dimension in the front-rear direction of the recess at the center in the left-right direction of the recess. In this case, since this flush toilet bowl can keep all the wash water flowing into the recess in the recess without immediately flowing into the drainage channel, and can raise the level of the wash water in the recess. A wider range of recesses can be cleaned.

The toilet bowl part of the flush toilet of the second invention has a washing shelf that is continuous with the upper part of the bowl surface and through which the washing water discharged from the water outlet flows, and the bowl surface is the center in the left-right direction of the front part. A third concave surface and a first convex surface are formed on the portion from the top to the bottom, and the vertical center of the first convex surface is greater than the vertical spacing between the vertical central portion of the first convex surface and the cleaning shelf. The space in the vertical direction between the portion and the bottom surface of the recess can be larger. In this case, the flush toilet can increase the momentum of the washing water flowing into the recess. For this reason, since the turning force of the swirling flow formed in the recess can be increased, a wider range in the recess can be cleaned.

A part of the first mainstream of the flush toilet of the second invention can form a flow that flows directly into the drainage channel. In this case, this flush toilet bowl can discharge filth etc. satisfactorily by the flow directly flowing into the drainage channel.

The flush toilet of the third invention is the left and right other side when viewed from the front of the toilet bowl, and the inward inclination of the wash shelf located on the downstream side of the wash water discharged from the spout and flowing through the wash shelf The angle is one of the left and right sides when viewed from the front of the toilet bowl, and the inward inclination angle of the wash shelf located upstream of the wash water discharged from the spout and flowing through the wash shelf is made smaller. obtain. In this case, this flush toilet makes it difficult for the wash water flowing on the surface of the wash shelf located on the downstream side to face inward. Thereby, this flush toilet can flow the wash water evenly on the surface of the wash shelf located on the downstream side and allow the wash water to reach the downstream side of the wash shelf located on the downstream side.

The flush toilet of the third invention is provided on a washing shelf located on the upstream side of the washing water that is discharged from the water outlet and flows through the washing shelf, as viewed from the front of the toilet bowl. The curvature at the first boundary portion that is located on the outer peripheral side of the shelf and continues to the rising surface is the other side of the left and right as viewed from the front of the toilet bowl, and the wash water that is discharged from the spout and flows through the wash shelf It can be made smaller than the curvature at the first boundary portion provided on the cleaning shelf located on the downstream side and continuing to the rising surface located on the outer peripheral side of the cleaning shelf. In this case, the flush toilet is provided in the washing shelf located on the upstream side, and the washing water flowing on the surface of the first boundary portion continuous with the rising surface located on the outer peripheral side of the washing shelf is the first boundary. By flowing down the part, it can flow in the inward direction.

The flush toilet of the third invention is the other side of the right and left as seen from the front of the toilet bowl, and the width of the wash shelf located on the downstream side of the wash water discharged from the spout and flowing through the wash shelf is the wash The upstream side can be made larger than the central portion in the direction in which water flows. In this case, the flush toilet can facilitate the flow of washing water from the washing shelf located on the upstream side into the washing shelf located on the downstream side.

The flush toilet of the third invention is the other side of the left and right as seen from the front of the toilet bowl, and the wash shelf located downstream of the wash water discharged from the spout and flowing through the wash shelf is It may be one of the left and right sides when viewed from the front, and higher than the cleaning shelf positioned upstream of the cleaning water discharged from the water outlet and flowing through the cleaning shelf. In this case, this flush toilet bowl can wash the elevation to a predetermined height even in the washing shelf located on the downstream side.

The flush toilet of the third aspect of the present invention is one of the left and right sides as seen from the front of the toilet bowl, and the shelf width of the wash shelf positioned on the upstream side of the wash water discharged from the spout and flowing through the wash shelf is predetermined. Can be formed while maintaining the shelf width. In this case, the flush toilet can moderately prevent the wash water from flowing down from the wash shelf located on the upstream side. As a result, it is possible to better secure the amount of cleaning water necessary for cleaning the cleaning shelf located on the downstream side.

A flush toilet of the fourth invention is one of the left and right sides as viewed from the front of the toilet bowl, and is a rear part of the wash shelf located on the downstream side of the wash water discharged from the spout and flowing through the wash shelf. The shelf width can gradually increase from the upstream side to the rear side left and right center part than the rear side left and right center part of the bowl part. In this case, this flush toilet bowl can flow and wash the entire surface of the rear of the washing shelf evenly while preventing the washing water flowing on the rear surface of the washing shelf from flowing toward the center of the toilet bowl.

The toilet bowl portion of the flush toilet of the fourth invention has a bowl surface continuous to the inner peripheral edge of the washing shelf, and is one of the left and right sides as seen from the front of the toilet bowl portion, and is washed by being discharged from the spout The second boundary part between the washing shelf located on the downstream side of the washing water flowing through the shelf and the bowl surface is the rear part of the washing shelf, and the second boundary part upstream of the rear center part of the toilet bowl part. The degree of projecting inward can be made smaller than the degree of projecting inward of the second boundary at the central portion of the cleaning shelf in the front-rear direction. In this case, this flush toilet is a washing shelf located on the downstream side, and when it flows from the washing shelf at the center in the front-rear direction of the toilet bowl toward the rear side, the inside of the second boundary portion. It will flow toward the rear of the washing shelf with a small degree of protrusion. And when washing water reaches the 2nd boundary part of the rear part of a washing shelf, it will flow down the 2nd boundary part and will flow toward the central part of a toilet bowl part. Then, this wash water flows toward the rear left and right center of the toilet bowl while flowing down toward the center of the toilet bowl. Thereby, since wash water can be poured into the back side right and left center part of a toilet bowl part, the back side right and left center part of a toilet bowl part can be wash | cleaned with wash water.

The flush toilet of the fourth aspect of the present invention is one of the left and right sides as seen from the front of the toilet bowl, and includes a wash shelf positioned on the downstream side of the wash water discharged from the spout and flowing through the wash shelf, and the bowl surface A 2nd boundary part is a rear part of a washing shelf, and the curvature radius of the 2nd boundary part in the upstream rather than the back side left-right center part of a toilet bowl part is the 2nd in the washing shelf of the center part of the front-back direction of a toilet bowl part. It can be larger than the radius of curvature of the boundary. In this case, this flush toilet is a washing shelf in which the washing water is located on the downstream side, and flows from the washing shelf in the central part in the front-rear direction of the toilet bowl toward the rear side, and thus the second boundary portion having a large curvature radius. Will flow towards the back of the wash shelf. When the cleaning water reaches the second boundary portion having a large curvature radius at the rear portion of the cleaning shelf, the cleaning water flows down toward the center portion of the toilet bowl portion. Then, this wash water flows toward the rear left and right center of the toilet bowl while flowing down to the center of the toilet bowl. Thereby, since wash water can be poured into the back side right and left center part of a toilet bowl part, the back side right and left center part of a toilet bowl part can be wash | cleaned with wash water.

The toilet bowl portion of the flush toilet of the fourth invention is connected to the standing surface that rises continuously on the outer peripheral edge of the washing shelf, the washing shelf and the standing surface, and is the rear portion of the washing shelf and the rear left and right sides of the toilet bowl portion And a bulging portion that bulges upward continuously from the outer peripheral edge upstream of the central portion. In this case, in the flush toilet, the direction in which the wash water that has flowed through the bulging portion changes in a direction toward the center of the toilet bowl. Thereby, since a lot of washing water can be poured into the back side right and left center part of the toilet bowl part, the back side right and left center part of the toilet bowl part can be washed better.

The bowl surface of the flush toilet of the fifth invention is formed by a first concave surface in which the central portion in the vertical direction on the left and right sides is recessed outward in the vertical direction, and the central portion in the vertical direction on the left and right sides is inward in the vertical direction. It can be formed with a protruding second convex surface. In this case, the flush toilet can increase the momentum flowing downward in the wash water flowing down the first concave surface. Thereby, the cleaning water flowing down the first concave surface flows into the concave portion from the left and right sides, and the cleaning water, filth, etc. in the concave portion can be agitated. Moreover, since this flush toilet bowl can restrain the downward direction of the wash water flowing through the second convex surface, the time until the wash water flows into the recess can be made longer. Thereby, the washing water flowing through the second convex surface can flow over a wider range of the bowl surface.

The second convex surface of the flush toilet of the fifth invention can be formed behind the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion. In this case, the flush toilet facilitates the washing water flowing through the second convex surface to reach the rear side of the concave portion. For this reason, since more washing water can flow down to the back side of a crevice, the back side of a crevice can be washed better.

The bowl surface of the flush toilet according to the fifth aspect of the present invention may be formed with a second concave surface that is recessed outwardly in front of the second convex surface in the horizontal cross-sectional shape at the top. In this case, for example, when the flush water reaches the second convex surface after the flush water flows through the second concave surface, the flush water may flow toward the central portion of the concave portion while being separated from the surface of the second convex surface. it can. That is, it is possible to increase the momentum of the cleaning water flowing downward as compared with the case where the cleaning water flows into the recess along the bowl surface. Thereby, the washing water, dirt, etc. in a recessed part can be stirred more favorably.

The flush toilet of the fifth aspect of the invention can form a main flow in which wash water discharged from the spout flows down the left and right sides of the bowl surface and flows into the recess from the front of the recess. In this case, this flush toilet bowl can form a swirl flow swirling in the recess. Thereby, the position of the water surface of the cleaning water in the recess is raised, and a wider range of the recess can be cleaned.

In the flush toilet of the sixth aspect of the invention, the first concave surface may be formed so as to be recessed outward and the third convex surface may be formed so as to protrude inward in the vertical sectional shape. In this case, for example, when the second main flow reaches the third convex surface after flowing through the first concave surface, the second main flow is less likely to move forward. For this reason, the 2nd mainstream which reached the 3rd convex surface can flow down the 3rd convex surface to the right and left sides of a crevice, and can stir washing water, dirt, etc. of a crevice.

The bowl surface of the flush toilet bowl according to the sixth aspect of the present invention may include a fourth concave surface formed to be recessed outward on the upper side of the third convex surface in the cross-sectional shape in the vertical direction. In this case, for example, when the second main flow reaches the fourth concave surface after flowing through the first concave surface, the second main flow is guided to the front side of the bowl surface by the fourth concave surface and the third convex surface. That is, the second main flow that flows through the fourth concave surface can be prevented from decreasing in the forward direction and can flow to the front side of the bowl surface.

The third convex surface of the flush toilet of the sixth invention can be formed in front of the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion. In this case, in the flush toilet, the second main flow flowing forward through the fourth concave surface is better guided to the front side of the bowl surface by the third convex surface. In other words, the second main flow that flows through the fourth concave surface is suppressed from decreasing in the forward direction, and can flow more satisfactorily toward the front side of the bowl surface.

The flush toilet of the sixth aspect of the invention can form a main flow in which the wash water discharged from the spout flows down the left and right sides of the bowl surface and flows into the recess from the front of the recess. In this case, this flush toilet bowl can form a swirl flow swirling in the recess. Thereby, the position of the water surface of the cleaning water in the recess is raised, and a wider range of the recess can be cleaned.

Embodiment 1 of the flush toilet of the first invention to the sixth invention will be described with reference to the drawings.

<Example 1>
The flush toilet 1 according to the embodiment includes a toilet bowl 10 and a drainage channel 30.

As shown in FIGS. 1 and 3 to 6, the toilet bowl 10 has a cleaning shelf 12, an upright surface 11, a bulging portion 11 B, and a bowl surface 13.

As shown in FIG. 1, the cleaning shelf 12 includes a left cleaning shelf 12A, a right cleaning shelf 12B, a rear cleaning shelf 12C, and a first boundary portion 10B that is a first boundary portion (the left and right are illustrated in the figure). 1 is the left-hand right side in 1. The same applies hereinafter.) (The front and rear are the lower upper side in FIG. 1. The same applies hereinafter.) The washing shelf 12 is formed along the periphery of the inner upper portion of the toilet bowl 10, and the washing water discharged from the water discharge port 11A flows (upper and lower sides are the front side rear side in FIG. 1; the same applies hereinafter). .

As shown in FIGS. 2 to 6, the left washing shelf 12A, the right washing shelf 12B, and the rear washing shelf 12C are continuous from the upper periphery of the toilet bowl 10 toward the center of the toilet bowl 10, respectively. While extending, it is inclined downward. Hereinafter, the direction toward the center of the toilet bowl 10 is referred to as an inward direction. Further, the inclination angle of the right cleaning shelf 12B that is inclined downward in the inward direction is smaller than the inclination angle of the left cleaning shelf 12A that is inclined downward in the inward direction.

Also, as shown in FIGS. 1, 3 to 5, the shelf width of the left cleaning shelf 12A is larger than the shelf width of the right cleaning shelf 12B. Here, the shelf width is a dimension of the washing shelf 12 in a direction perpendicular to the circumferential direction of the toilet bowl 10 in a plan view viewed from above. Moreover, as shown in FIG. 1, the width | variety of the right side washing shelf 12B has a larger front side upstream than the central portion in the direction in which the washing water flows. Here, the upstream side of the right cleaning shelf 12B is the front side of the right cleaning shelf 12B, and is the side where cleaning water flows into the right cleaning shelf 12B. The downstream side of the right cleaning shelf 12B is the rear side of the right cleaning shelf 12B, and is the side from which the cleaning water flows out from the right cleaning shelf 12B. Further, the upstream side of the left cleaning shelf 12A is the rear side of the left cleaning shelf 12A, and is the side where the cleaning water flows into the left cleaning shelf 12A. The downstream side of the left cleaning shelf 12A is the front side of the left cleaning shelf 12A, and is the side from which the cleaning water flows out from the left cleaning shelf 12A.

Moreover, it is the shelf width of the rear washing shelf 12C located on the right side that is upstream from the rear left and right center of the toilet bowl 10 of the rear washing shelf 12C, and the downstream end of the right washing shelf 12B. The shelf width at the rear end is smaller than the shelf width of the right washing shelf 12B at the center in the front-rear direction of the toilet bowl 10. Here, the upstream side of the rear cleaning shelf 12C is the right side of the rear cleaning shelf 12C, and is the side where the cleaning water flows into the rear cleaning shelf 12C. Further, the downstream side of the rear cleaning shelf 12C is the left side of the rear cleaning shelf 12C, and is the side from which the cleaning water flows out from the rear cleaning shelf 12C. The rear cleaning shelf 12 C is a rear portion of the cleaning shelf 12. Further, the rear washing shelf 12C gradually increases in width from the right side, which is upstream of the rear left and right central part of the toilet bowl 10, toward the rear left and right central part. The width of the rear end of the right cleaning shelf 12B is smaller than the width of the central portion in the left-right direction of the rear cleaning shelf 12C. Further, the upstream side of the left and right sides of the cleaning shelf 12 is one of the left side cleaning shelf 12A and the right side cleaning shelf 12B, and the cleaning water discharged from the spout 11A is left side cleaning shelf 12A or the right side cleaning shelf. It is the side which flowed through the section of more than half of the length of 12B first. Further, the downstream side of the cleaning shelf 12 is the other side of the left cleaning shelf 12A and the right cleaning shelf 12B. In the first embodiment, the upstream side of the cleaning shelf 12 is the left side cleaning shelf 12A, and the downstream side is the right side cleaning shelf 12B.

The first boundary portion 10B is formed continuously on the outer peripheral edge of the left cleaning shelf 12A, the right cleaning shelf 12B, and the rear cleaning shelf 12C. The first boundary portion 10B is formed by a curved surface that is recessed obliquely outward and downward. The elevation surface 11 rises continuously on the outer peripheral edge of the first boundary portion 10B. That is, the vertical surface 11 rises continuously on the outer peripheral edge of the cleaning shelf 12. The elevation surface 11 is formed with a large curvature between the front side and the rear side in a plan view from above. Here, a region surrounded by the front side where the curvature of the elevation surface 11 is large is referred to as a front region G, and a space surrounded by the rear side where the curvature of the elevation surface 11 is large is referred to as a rear region H. The first boundary portion 10B is formed with a curved surface that is recessed obliquely outward and downward, and is formed so as to smoothly connect the cleaning shelf 12 and the standing surface 11 (see FIGS. 3 to 6). The first boundary portion 10B is provided on the left washing shelf 12A, and the curvature in the vertical direction at the portion continuous with the rising surface 11 that is located on the outer peripheral side of the left washing shelf 12A is provided on the right washing shelf 12B. It is smaller than the curvature in the up-down direction at the portion that is located on the outer peripheral side of the cleaning shelf 12B and continues to the rising surface 11 that rises.

In addition, the elevation surface 11 is provided with a spout 11A. The water discharge port 11A is provided on the left side of the flush toilet 1 when viewed from the front, and is opened in the front-rear direction on the rear side of the standing surface 11 (see FIGS. 1, 3 to 5). The water discharge port 11 A discharges cleaning water and supplies the cleaning water into the toilet bowl 10.

The bulging portion 11B is provided in connection with the cleaning shelf 12 and the vertical surface 11 on the right side of the rear region H. Specifically, the bulging portion 11B is a rear region H in which the curvature of the upper edge of the upright surface 11 is large in a plan view of the toilet bowl 10 viewed from above, and the rear left and right center of the toilet bowl 10 The right rear cleaning shelf 12C and the right cleaning shelf 12B, which are upstream from the upper part, are continuously bulged upward from the outer peripheral edge of the rear end of the right cleaning shelf 12B. The bulging portion 11B is formed with a curved surface that is recessed obliquely outward and downward, and is formed so as to smoothly connect the cleaning shelf 12 and the standing surface 11. As shown in FIGS. 3 to 5, the bulging portion 11B has a large width in the vertical direction from the left and right end portions of the bulging portion 11B toward the central portion in the left and right direction of the bulging portion 11B. The center part in the left-right direction is located on the upper side compared to the part. That is, in the shape of the bulging portion 11B seen in the horizontal direction from the inside of the toilet bowl 10, the upper edge gradually increases from the upstream end where the washing water flows toward the central portion, and from the central portion toward the downstream end. Gradually lower.

As shown in FIGS. 1 and 2, the bowl surface 13 includes a front bowl surface 13A, a rear bowl surface 13B, and a bottom surface 13L. The front bowl surface 13A includes a first bowl surface 13C, a second bowl surface 13D, and a third bowl surface 13E.

1st bowl surface 13C is located in the upper part of the front side of bowl surface 13. As shown in FIG. 1, the left and right sides of the first bowl surface 13C are continuous with the front edge of the left cleaning shelf 12A and the front edge of the right cleaning shelf 12B. Further, the front side of the first bowl surface 13C is continuous with the lower end portion of the front end portion of the upright surface 11 as shown in FIG. The first bowl surface 13 C includes a front concave surface 13 H that is a third concave surface that is curved and recessed obliquely outward and downward. The front concave surface 13H descends toward the rear side, and the inclination toward the lower rear side is gentle.

As shown in FIGS. 1 and 2, the second bowl surface 13 D is continuous with the rear end portion of the first bowl surface 13 C. Further, the second bowl surface 13D is continuous on the right and left sides of the front edge of the left washing shelf 12A and the front left edge of the right washing shelf 12B via the second boundary portion 10C, which is the second boundary portion. It is formed extending in the direction. 10C of 2nd boundary parts are the curved surfaces provided between the bowl surface 13 and the washing shelf 12, and were formed so that it might protrude diagonally upward inside, so that the bowl surface 13 and the washing shelf 12 might be connected smoothly. Is formed. That is, the inner peripheral edge of the washing shelf 12 is continuous with the bowl surface 13 through the second boundary portion 10 C. Further, the second boundary portion 10C between the right washing shelf 12B and the bowl surface 13 has a right side upstream of the rear left and right center of the toilet bowl portion 10 of the rear washing shelf 12C and the right washing shelf 12B. The degree of protrusion inside the second boundary portion 10C at the rear end portion is formed smaller than the degree of protrusion inside the second boundary portion 10C at the center portion in the front-rear direction of the right cleaning shelf 12B (FIG. 3). , 6). Specifically, the second boundary portion 10C between the right washing shelf 12B and the bowl surface 13 is upstream of the rear left and right central portions of the toilet bowl portion 10 of the rear washing shelf 12C, and the right washing shelf 12B. The curvature radius of 10 C of 2nd boundary parts in a rear-end part is formed larger than the curvature radius of 10 C of 2nd boundary parts in the right side washing shelf 12B of the center part of the front-back direction of the toilet bowl part 10 (FIG. 3, 6). reference.). Here, the degree of protrusion is an amount by which the center of the cleaning shelf 12 and the bowl surface 13 protrudes obliquely upward and inward in the second boundary portion 10C that smoothly connects the washing shelf 12 and the bowl surface 13. In other words, a large degree of protrusion means that in the second boundary portion 10C that smoothly connects the cleaning shelf 12 and the bowl surface 13, the center of the cleaning shelf 12 and the bowl surface 13 protrudes obliquely upward and inside. Means that.

In addition, the second bowl surface 13D has a gentler slope toward the lower rear side than the first bowl surface 13C. Moreover, the 2nd bowl surface 13D has the center part of the left-right direction of a rear-end part located in the front side compared with both right-and-left sides (refer FIG. 1).

The third bowl surface 13E is formed such that the upper end of the third bowl surface 13E extends downward from the rear end portion of the second bowl surface 13D in a horizontal direction downward. The center part of the 3rd bowl surface 13E is located in the front side compared with the left-right both sides (refer FIG. 1). The third bowl surface 13E is formed to be bent forward so that the left and right center is located at the most front side in a plan view seen from above, and has a curvature that curves to the front side of the left and right center portion compared to the left and right sides. large. Further, the second bowl surface 13D and the third bowl surface 13E are provided with a front convex surface 13K that is a first convex surface that curves upward and bulges in the front-rear direction (see FIG. 2). That is, the bowl surface 13 is formed with a front concave surface 13H and a front convex surface 13K from the top to the bottom at the center in the left-right direction of the first bowl surface 13C, the second bowl surface 13D, and the third bowl surface 13E. Yes.

The rear bowl surface 13B is the rear part of the bowl surface 13. In the rear bowl surface 13B, the central part in the left-right direction is located on the rear side compared to the left and right sides. The rear bowl surface 13B is formed to be curved so that the right and left center is located on the rearmost side in a plan view seen from above. The rear bowl surface 13B is continuously connected to the right edge on the rear side of the left washing shelf 12A, the left edge on the rear side of the right washing shelf 12B, and the front edge of the rear washing shelf 12C via the second boundary portion 10C. It hangs down while tilting in the direction. Further, the left front end of the rear bowl surface 13B is continuous to the left rear end of the second bowl surface 13D and the left rear end of the third bowl surface 13E. The right front end of the rear bowl surface is continuous with the right rear end of the second bowl surface 13D and the right rear end of the third bowl surface 13E. Hereinafter, a space surrounded by the third bowl surface 13E and the lower part of the rear bowl surface 13B is referred to as a recess 10D. That is, the recess 10D is formed in the lower part of the bowl surface 13 and is provided continuously from the upper part of the bowl surface 13 (see FIG. 2).

Moreover, as shown in FIG. 3, in the upper end portion of the rear bowl surface 13B, the left side is steeper inward than the right side. In addition, the central portion in the vertical direction on the left side of the rear bowl surface 13B is formed by a first left concave surface 13F that is a first concave surface that is recessed outward in the vertical direction, and the central portion in the vertical direction on the right side is inward in the vertical direction. It is formed by a right convex surface 13J which is a protruding second convex surface. Further, the right convex surface 13J is formed behind the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion 10D (see FIG. 1).

Further, the bowl surface 13 has a horizontal cross-sectional shape, and a first left concave surface 13F recessed outward on the left side of the rear bowl surface 13B and a third convex surface projecting inward to the front side from the first left concave surface 13F. A left convex surface 13G is formed (see FIG. 8). Also in the vertical cross-sectional shape, the first left concave surface 13F is formed to be recessed outward, and the left convex surface 13G is formed to protrude inward (see FIGS. 3 and 4). Further, in the cross-sectional shape in the vertical direction, the bowl surface 13 is formed with a second left concave surface 13P, which is a fourth concave surface formed to be recessed outward, on the upper side of the left convex surface 13G (see FIG. 4). The left convex surface 13G is formed in front of the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion 10D (see FIG. 1). Further, the bowl surface 13 is formed with a right concave surface 13M, which is a second concave surface recessed outwardly in front of the right convex surface 13J in the horizontal cross-sectional shape at the top (see FIG. 7). Also in the cross-sectional shape in the vertical direction, the right convex surface 13J is formed to protrude inward, and the right concave surface 13M is formed to be recessed outward (see FIGS. 3 and 4).

As shown in FIG. 1, the left and right sides and the front side of the outer peripheral edge are formed such that the bottom surface 13L extends in the rear direction continuously from the lower end of the third bowl surface 13E and the lower ends of the left and right sides of the rear bowl surface 13B. Has been. That is, the bottom surface 13L is continuously provided at the lower end of the recess 10D. The bottom surface 13L is inclined downward in the rear side (see FIG. 2). Further, the bottom surface 13L has a central portion in the left-right direction of the rear end portion positioned on the front side as compared with both left and right sides of the rear end portion. That is, the rear end portion of the bottom surface 13 L is formed to be curved toward the front side so that the central portion in the left-right direction is located on the most front side in a plan view seen from above. An inflow port 30A is formed at the rear of the bottom surface 13L. Specifically, the inflow port 30A is formed continuously from the rear end portion of the bottom surface 13L and the lower end of the rear bowl surface 13B. Further, the dimension in the front-rear direction of the inflow port 30A is smaller than half of the dimension in the front-rear direction of the recess 10D at the center in the left-right direction of the recess 10D. In Example 1, the dimension in the front-rear direction of the inflow port 30A extends from the left end to the right end of the recess 10D, and is smaller than half of the dimension in the front-rear direction of the recess 10D. In plan view from above, the area of the inflow port 30A is also smaller than half the area of the space surrounded by the third bowl surface 13E and the lower part of the rear bowl surface 13B.

In the toilet bowl portion 10 formed in this manner, the front convex surface 13K of the second bowl surface 13D and the third bowl surface 13E is positioned lower than the washing shelf 12 and higher than the bottom surface 13L, as shown in FIG. . Specifically, the second bowl surface 13D and the third bowl surface are more than the vertical interval U between the vertical center of the front convex surface 13K of the second bowl surface 13D and the third bowl surface 13E and the cleaning shelf 12. The distance L in the vertical direction between the central portion in the vertical direction of the front convex surface 13K of 13E and the bottom surface 13L of the concave portion 10D is formed larger.

The drainage channel 30 has an upstream end continuous with an inflow port 30A formed at the rear of the bottom surface 13L of the recess 10D. Further, the drainage channel 30 has a descending channel 30B extending downward in the rear side and an ascending channel 30C extending continuously upward from the downstream end of the descending channel 30B toward the upper rear side. The downstream end of the ascending flow path 30C opens rearward, and is inserted into and connected to the opening at the upstream end of a connection member (not shown). The flush toilet 1 can communicate with a drain pipe drawn from a wall surface provided at a place where the drainage channel 30 is installed via a connecting member (not shown).

1 and 2, a flush water supply port 14 is provided at the rear of the flush toilet 1. The washing water supply port 14 is inserted with a drainage port of a washing tank (tank) that is placed and fixed on the flush toilet 1 (not shown). The cleaning water supplied from the drain of the cleaning tank to the cleaning water supply port 14 is discharged into the toilet bowl 10 from a water discharge port 11A provided on the elevation surface 11 through a water discharge pipe (not shown). .

As shown in FIG. 2, the flush toilet 1 thus formed can form a water reservoir P in the toilet bowl 10. Specifically, the water reservoir P is formed in a space surrounded by the recess 10D, the bottom surface 13L, the descending channel 30B, and the ascending channel 30C. The water storage surface W of the water storage part P is located above the bottom surface 13L. The drainage channel 30 is a trap drainage channel that blocks communication between the toilet bowl 10 and the drainage pipe drawn out from the wall surface provided at the place where the installation is to be performed.

Next, how the wash water flows in the toilet bowl 10 of the flush toilet 1 will be described.

Wash water stored in the wash tank is drained from the drain of the wash tank (not shown). Then, the wash water is discharged into the toilet bowl 10 from the water outlet 11A via the water discharge pipe. Then, as shown in FIGS. 9 and 10, a part of the washing water discharged from the water outlet 11A flows down the left side of the rear part of the rear bowl surface 13B and flows into the water storage part P in the recess 10D. It becomes the flow Z which is the second mainstream (hereinafter referred to as the flow Z). That is, the flow Z flows down from the left side of the rear portion of the bowl surface 13 and flows into the concave portion 10D from the rear or side of the concave portion 10D. Further, another part of the cleaning water discharged from the water discharge port 11A flows forward on the surface of the left cleaning shelf 12A (hereinafter referred to as flow A). The left cleaning shelf 12A is inclined downward in the inward direction. Thereby, the flow A becomes easy to flow in the inward direction. Further, the shelf width of the left cleaning shelf 12A is larger than the shelf width of the right cleaning shelf 12B (see FIGS. 3 to 5). Thereby, the left washing shelf 12A secures the amount of water of the flow A flowing forward on the surface, and the flow A of the amount of water necessary for washing the first bowl surface 13C, the right washing shelf 12B, etc. It can be made to flow into the right washing shelf 12B or the like. Then, the flow A flows from the front side of the left cleaning shelf 12A to the left side of the first bowl surface 13C. Further, the shelf width of the left cleaning shelf 12A is formed so as to maintain a predetermined shelf width (see FIG. 1). Thereby, the left cleaning shelf 12A can moderately suppress the flow A flowing forward on the surface from flowing down from the left cleaning shelf 12A.

Then, the flow A flows by turning the first bowl surface 13C counterclockwise in a plan view as viewed from above, and a part of the flow A flows from the right side of the first bowl surface 13C to the second bowl surface 13D. It flows down the right side and the right side of the third bowl surface 13E and flows into the water reservoir P in the recess 10D to become the flow Y which is the first main flow which is the main flow (hereinafter referred to as flow Y). That is, in the flow Y, the wash water discharged from the water discharge port 11A flows down from the right side of the first bowl surface 13C and flows into the recess 10D from the front of the recess 10D.

A part of the flow A that has reached the front side of the right cleaning shelf 12B is located on the front side of the right cleaning shelf 12B, the right side of the first bowl surface 13C, the right side of the second bowl surface 13D, and the right side of the third bowl surface 13E. It flows down and flows into the water reservoir P in the recess 10D to become a flow V (hereinafter referred to as a flow V). When the flow V flows down the right concave surface 13M and reaches the right convex surface 13J, the flow direction is changed downward.

Further, another part of the flow A flows into the right cleaning shelf 12B from the front side of the right cleaning shelf 12B and flows backward on the surface of the right cleaning shelf 12B. The shelf width of the right cleaning shelf 12B is larger at the front side upstream than the central portion in the direction in which the cleaning water flows, and is smoothly continuous with the first bowl surface 13C. It tends to flow from the right side of the surface 13C to the front side of the right cleaning shelf 12B. That is, the left cleaning shelf 12A is located upstream of the flow A flowing through the cleaning shelf 12, and the right cleaning shelf 12B is located downstream of the flow A flowing through the cleaning shelf 12.

Also, the flow A flowing backward on the surface of the right cleaning shelf 12B has a smaller momentum and amount of water than the cleaning water immediately after being discharged from the spout 11A. For this reason, the flow that flows backward on the surface of the right cleaning shelf 12B by making the inclination angle inclined downward in the inward direction of the right cleaning shelf 12B smaller than the inclination angle inclined downward in the inward direction of the left cleaning shelf 12A. It is difficult for A to go to the bowl surface 13. Thereby, the flow A flows evenly on the surface of the right washing shelf 12B, and the flow A can reach the rear end portion of the right washing shelf 12B. Then, the flow A that has reached the rear end of the right cleaning shelf 12B flows from the right side of the rear cleaning shelf 12C to the left on the surface of the rear cleaning shelf 12C and joins the flow Z. The right cleaning shelf 12B gradually decreases in width toward the rear end. Further, the shelf width on the upstream side of the rear washing shelf 12C continuous with the rear end portion on the downstream side of the right washing shelf 12B is formed to be smaller than the shelf width on the rear left and right center portion of the toilet bowl portion 10. The shelf width gradually increases from the upstream side to the rear left and right central part from the rear left and right central part of the toilet bowl 10. Accordingly, the flow A flowing in the left direction on the surface of the rear cleaning shelf 12C can flow and be cleaned evenly on the surface of the rear cleaning shelf 12C while preventing the flow A from flowing down to the rear bowl surface 13B. Further, the right cleaning shelf 12B is arranged at a position higher than the left cleaning shelf 12A. For this reason, even in the right washing shelf 12B, which is the downstream washing shelf 12 where the amount of washing water flowing and the amount of water is smaller than the left washing shelf 12A, the elevation surface 11 is washed to a predetermined height substantially the same as the left washing shelf 12A. can do.

Part of the flow A that has reached the rear end of the right cleaning shelf 12B rides on the surface of the bulging portion 11B and flows. Thereby, the range which wash | cleans the standing surface 11 located in the upper side of the washing shelf 12 in the downstream of the flow A which flows through the washing shelf 12 can be enlarged. That is, the bulging portion 11B is a rear region H on the downstream side of the wash water that is discharged from the spout 11A and flows through the wash shelf 12 in the front region G or the rear region H, and includes the right wash shelf 12B and the stool. It is formed at a position continuous to the outer peripheral side of the rear cleaning shelf 12 C on the right side, which is the upstream side of the rear left and right central part of the pot 10.
Here, in the front region G or the rear region H, the direction in which the cleaning water discharged from the water discharge port 11A first flows through the front end portion of the front region G or the rear end portion of the rear region H is upstream. The one that flows later is the downstream side. In the first embodiment, the front region G is the upstream side, and the rear region H is the downstream side. Further, the bulging portion 11B is formed in the rear region H where the curvature of the upper end edge of the upright surface 11 is large in a plan view seen from above. Thereby, the flow A flowing backward on the surface of the right washing shelf 12B flows on the surface of the bulging portion 11B because the centrifugal force related to the flow A flowing to the position where the bulging portion 11B is provided increases. It becomes easy. Further, the bulging portion 11B is formed as a curved surface that is curved and recessed obliquely outward and downward. As a result, the flow A can flow into the bulging portion 11B with a small resistance, and the momentum of the flow A is unlikely to be small, so it rides on the surface of the bulging portion 11B and flows well on the surface of the bulging portion 11B. be able to. A part of the flow A flowing through the bulging portion 11B becomes an inward flow (hereinafter referred to as flow D) by flowing through the bulging portion 11B. Thereby, the rear side of the rear bowl surface 13B can be washed by the flow D flowing down.

Further, the upper edge of the bulging portion 11B gradually increases from the upstream side of the wash water toward the central portion in the left-right direction of the bulging portion 11B when viewed in the horizontal direction from the inside of the toilet bowl portion 10, It gradually decreases from the central portion in the left-right direction of the bulging portion 11B toward the downstream side of the washing water. Thereby, the flow A can flow without being disturbed on the surface of the bulging portion 11B and the periphery of the bulging portion 11B.

Also, the shelf width of the rear end portion of the right washing shelf 12B, which is upstream of the rear washing shelf 12C, is smaller than the shelf width of the right washing shelf 12B at the center in the front-rear direction of the toilet bowl 10. As a result, when the flow A flows from the right washing shelf 12B in the central portion in the front-rear direction of the toilet bowl 10 toward the rear end, the flow A flowing on the left end side of the right washing shelf 12B faces the bowl surface 13. The flow flows down (hereinafter referred to as flow E). Furthermore, the vertical curvature radius of the second boundary portion 10C located at the rear portion of the right washing shelf 12B is the vertical direction of the second boundary portion 10C located at the right washing shelf 12B in the center portion of the toilet bowl portion 10 in the front-rear direction. The right convex surface 13J is formed on the right side of the rear bowl surface 13B. Thereby, since the downward direction of the flow E can be suppressed, the flow E easily reaches the rear side of the rear bowl surface 13B. Thereby, since the flow E can be flowed down to the rear side of the rear bowl surface 13B, the rear side of the rear bowl surface 13B can be cleaned also by the flow E. Further, the right convex surface 13J is formed behind the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion 10D. Thereby, it becomes easier to make the flow E reach the rear side of the rear bowl surface 13B. For this reason, since the flow E can flow more down to the rear side of the rear bowl surface 13B, the rear side of the rear bowl surface 13B can be cleaned better.

The flow A discharged from the spout 11A and flowing forward on the surface of the left cleaning shelf 12A is easy to flow in the direction toward the bowl surface 13 because the left cleaning shelf 12A is inclined downward in the inward direction. Thereby, a part of the flow A that flows forward on the surface of the left cleaning shelf 12A becomes a flow that flows down the left side of the bowl surface 13 (hereinafter referred to as flow B). The flow B is a second main flow that flows down from the left side of the rear portion of the bowl surface 13 and flows into the recess 10D from the rear or side of the recess 10D. And the flow B0 which is a part of the flow B flows forward while flowing down the first left concave surface 13F of the bowl surface 13. Further, the flow A flowing forward on the left side of the surface of the left cleaning shelf 12A flows while riding on the surface of the first boundary portion 10B between the left cleaning shelf 12A and the upright surface 11. The curvature in the vertical direction at the first boundary portion 10B between the left cleaning shelf 12A and the upright surface 11 standing on the outer peripheral side of the left cleaning shelf 12A is positioned on the outer peripheral side of the right cleaning shelf 12B and the right cleaning shelf 12B. Therefore, it is smaller than the curvature in the vertical direction at the first boundary portion 10B with the rising surface 11 rising. Thereby, the flow A flowing on the surface of the first boundary portion 10B of the left cleaning shelf 12A and the rising surface 11 standing on the outer peripheral side of the left cleaning shelf 12A flows down the first boundary portion 10B, thereby A flow in the direction (hereinafter referred to as flow C) is formed.

In the upper end portion of the rear bowl surface 13B, the left side has a steeper inward direction than the right side, and the first left concave surface 13F is formed to be recessed outside the toilet bowl portion 10, so that the first left concave surface The flow B0 flowing down on the left side of the upper end of the rear bowl surface 13B, which is the upper part of 13F, has a greater momentum to flow downward. Thereby, the left side of the rear bowl surface 13B can be washed by the flow B0 flowing down. Moreover, since the flow B0 which flows down the left side of the upper end part of the rear bowl surface 13B and the first left concave surface 13F increases in the downward direction, it flows into the left side of the water storage part P and flows into the water storage part P. Stir wash water and filth. Further, the first left concave surface 13F is formed behind the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion 10D. Thereby, a part of the wash water discharged from the water discharge port 11A can be discharged from the water discharge port 11A and directly flow down to the rear pot surface 13B on the rear side of the rear pot surface 13B. That is, the flow B0 can flow down at a position closer to the rear side of the rear bowl surface 13B.

Further, the flow B1, which is a part of the flow B flowing down the first left concave surface 13F, reaches the left convex surface 13G formed on the front side of the first left concave surface 13F while flowing in the forward direction. Then, the flow B1 that has reached the left convex surface 13G collides with the left convex surface 13G, thereby reducing the forward momentum. For this reason, the flow B1 that has reached the left convex surface 13G flows down the left convex surface 13G and flows into the left side of the water reservoir P, and stirs the cleaning water, filth, and the like of the water reservoir P. Further, the flow B2, which is a part of the flow B reaching the left convex surface 13G, flows into the third bowl surface 13E from the left side of the third bowl surface 13E, flows to the right through the third bowl surface, and flows into the recess 10D. To do.

Further, the flow B3, which is a part of the flow B, flows forward through the second left concave surface 13P above the left convex surface 13G. Then, the flow B3 flowing forward through the second left concave surface 13P is guided to the left side of the second bowl surface 13D and flows forward through the second bowl surface 13D from the left side of the second bowl surface 13D. That is, the flow B3 flowing through the second left concave surface 13P is restrained from reducing the forward momentum, and can flow forward through the second bowl surface 13D from the left side of the second bowl surface 13D. Further, the left convex surface 13G and the second left concave surface 13P are formed in front of the central portion in the front-rear direction at the central portion in the left-right direction of the concave portion 10D. As a result, the flows B1 and B2 that collide with the left convex surface 13G flow toward the concave portion 10D, and the flow B3 flowing forward through the second left concave surface 13P is well guided by the left side of the second bowl surface 13D, and the second bowl The surface 13D can flow forward. Then, the flow B3 that has flowed into the second bowl surface 13D from the left side of the second bowl surface 13D and the flow B4 that is a part of the flow B flow while swirling counterclockwise on the front side of the second bowl surface 13D. , Merge into stream Y.

Further, as shown in FIG. 10, a part of the flow Y flowing into the water reservoir P of the recess 10D collides with the bottom surface 13L (hereinafter referred to as flow Y1). Then, the flow direction of the flow Y1 is changed to the rear upper side and flows toward the rear bowl surface 13B. That is, the flow Y1, which is a part of the first main flow Y, flows into the recess 10D from the front of the recess 10D by the wash water discharged from the spout 11A flowing down the bowl surface 13 and collides with the bottom surface 13L. And bounces toward the rear surface of the recess 10D. And the flow Y1 swirls the water storage part P counterclockwise with the flows Z and B which flow into the recessed part 10D from the back or side of the recessed part 10D in the water storage part P in the plan view seen from above. A swirling flow X is formed (see FIG. 9). When the flow Z flows into the recess 10D from the rear or the side, the flow Z turns in the counterclockwise direction that is the horizontal direction along the third bowl surface 13E. The third bowl surface 13E is formed to have a larger radius of curvature that curves to the front side of the left and right central part in a plan view from above as compared to a conventional toilet. Thereby, the flow Z can be made easier to turn. That is, the flows Z and B which are the second main flow merge with the flow Y which is the first main flow. Thereby, since the position of the stored water surface W of the surface side of the bowl surface 13 rises, the bowl surface 13 above the stored water part P and the stored water part P can be wash | cleaned. The stored water surface W at this time rises to a position substantially the same as the position of the lower end portion 13N of the first left concave surface 13F (see FIG. 3). Further, another part of the flow Y forms a flow Y2 that directly flows into the drainage channel 30 via the inflow port 30A (hereinafter referred to as the flow Y2).

Also, the dimension in the front-rear direction of the inflow port 30A is smaller than half of the dimension in the front-rear direction at the center in the left-right direction of the recess 10D. In Example 1, the dimension in the front-rear direction of the inflow port 30A extends from the left end to the right end of the recess 10D, and is smaller than half of the dimension in the front-rear direction of the recess 10D. In plan view from above, the area of the inflow port 30A is also smaller than half the area of the space surrounded by the third bowl surface 13E and the lower part of the rear bowl surface 13B. Thereby, all the washing water flowing into the water reservoir P can be retained in the recess 10D without immediately flowing into the drainage channel 30, and the position of the water reservoir W on the surface side of the pot surface 13 of the water reservoir P. Therefore, it is possible to clean a wider range of the recess 10D.

Further, the front side of the second bowl surface 13D and the third bowl surface 13E from the vertical center U of the front convex surface 13K of the second bowl surface 13D and the third bowl surface 13E and the cleaning shelf 12 in the vertical direction. The distance L in the vertical direction between the central portion in the vertical direction of the convex surface 13K and the bottom surface 13L of the concave portion 10D is formed larger (see FIG. 2). That is, by bringing the vertical position of the front convex surface 13K closer to the position of the cleaning shelf 12, the distance between the front convex surface 13K and the bottom surface 13L becomes larger. Thereby, the momentum which the flow Y flows in into the water storage part P can be enlarged more. For this reason, the flow momentum of the flow Y1 is increased, and the momentum of the flow changed to the rear upper side can be increased by colliding with the bottom surface 13L and jumping to the rear side. The bowl surface 13 above the water part P can be washed. Moreover, since the momentum of the flow Y2 can be further increased, the filth can be discharged to the drainage channel 30 better.

Further, the flows B0 and B1 flowing down the left side of the rear bowl surface 13B and the left convex surface 13G and flowing into the left side of the water reservoir P flow rightward on the surface of the bottom surface 13L when reaching the bottom surface 13L. It will be. As a result, the flows B0 and B1 flowing down the left side of the rear bowl surface 13B and the left convex surface 13G and flowing into the left side of the water reservoir P disrupt the flow below the swirling flow X, and the swirling flow X The lower stream can be merged into stream Y2. Thereby, the filth etc. swirling with the swirl flow X can be merged into the flow Y2, and the filth etc. can be pushed into the drainage channel 30 and discharged well. Further, of the flows B0 and B1, the flow that reaches the front side of the bottom surface 13L and flows in the right direction forms a swirl flow X that swirls counterclockwise in the recess 10D (see FIG. 9).

The flush toilet 1 is formed with a first left concave surface 13F on the bowl surface 13 at a position corresponding to the upstream side of the left washing shelf 12A, and a left convex surface 13G on the bowl surface 13 at a position corresponding to the downstream side. ing. As a result, the cleaning water that has flowed through the first left concave surface 13F and reached the left convex surface 13G can easily flow down toward the concave portion 10D, and the cleaning water, filth, and the like can be discharged well. Further, the washing water flowing in the forward direction on the upper side of the left convex surface 13G can be easily swirled around the bowl surface 13 to allow the bowl to be washed well. The right concave surface 13M is formed on the bowl surface 13 at a position corresponding to the upstream side of the right cleaning shelf 12B, and the right convex surface 13J is formed on the bowl surface 13 at a position corresponding to the downstream side. As a result, the cleaning water that has flowed through the right concave surface 13M and reached the right convex surface 13J can easily flow down toward the concave portion 10D, and the cleaning water, filth, and the like can be discharged well. Further, the washing water flowing backward on the upper side of the right convex surface 13J can be swirled around the bowl surface to facilitate the washing so that the bowl can be washed well. That is, this flush toilet 1 forms a concave surface (first left concave surface 13F, right concave surface 13M) on the bowl surface 13 at a position corresponding to the upstream side of each of the left washing shelf 12A and the right washing shelf 12B. A convex surface (left convex surface 13G, right convex surface 13J) is formed on the bowl surface 13 at a position corresponding to. Thereby, this flush toilet 1 flowed through the concave surfaces (first left concave surface 13F, right concave surface 13M) and reached the convex surfaces (left convex surface 13G, right convex surface 13J) on the left side and the right side of the bowl surface 13, respectively. The washing water can easily flow down toward the concave portion 10D, and the washing water and filth can be discharged well. The washing water flowing on the upper side of the convex surface (the left convex surface 13G and the right convex surface 13J) is allowed to flow to the bowl surface 13. This makes it easy to clean the bowl.

As described above, in the flush toilet 1, when the flow A flowing through the washing shelf 12 flows into the bulging portion 11 B connected to the washing shelf 12 and the elevation surface 11, the washing water rides on the bulging portion 11 B and flows. become. For this reason, this flush toilet 1 can wash | clean the standing surface 11 which stands | starts up continuously at the outer periphery of the washing shelf 12 with the flow A even if it is an area | region where washing water does not flow easily. That is, the flush toilet 1 can wash the upright surface 11 located above the washing shelf 12.
Moreover, this flush toilet 1 raises the position of the water surface W in the recess 10D, and can wash a wider range of the recess 10D.
Further, the flush toilet 1 is configured to wash the amount of water necessary for washing the right washing shelf 12B located downstream by making the shelf width of the left washing shelf 12A larger than the width of the right washing shelf 12B located downstream. Water can be secured. Thereby, this flush toilet 1 can also flow washing water to the right washing shelf 12B located on the downstream side.
Further, the flush toilet 1 is a right side washing shelf 12B located on the downstream side when the flow A flows from the right side washing shelf 12B in the center in the front-rear direction of the toilet bowl 10 toward the rear side. The flow A flowing inside the right washing shelf 12B located at the position becomes the flow E flowing down in the inward direction. Then, the flow E flows toward the rear left and right center of the toilet bowl 10 while flowing down in the inward direction. Thereby, since the flow E can be made to flow to the rear left and right central part of the toilet bowl 10, the rear left and right central part of the toilet bowl 10 can be washed with the flow E.
In addition, the flush toilet 1 can increase the momentum flowing downward in the flow B flowing down the upper part of the bowl surface 13 with a steep slope. As a result, the flow B flowing down the top of the bowl surface with a steep slope increases the water force flowing into the concave portion 10D from the left side, stirs the washing water, filth, etc. in the concave portion 10D, and puts the filth etc. in the drainage channel. It can be discharged well.
Further, in the flush toilet 1, when the flow B flows through the first left concave surface 13F and the left convex surface 13G, the flow B flows from the left side of the rear portion of the bowl surface 13 to the concave portion 10D by the first left concave surface 13F and the left convex surface 13G. It is possible to adjust the direction of inflow toward. As a result, the flush toilet 1 can cause the flow B to flow down to a desired position in the recess 10D, stir the washing water, filth, etc. in the recess 10D, and discharge the filth etc. to the drainage channel.

Therefore, this flush toilet 1 can discharge filth and the like satisfactorily while washing a wider range of the surface of the toilet bowl 10.

Further, the bulging portion 11B of the flush toilet 1 is formed in a rear region H where the curvature of the elevation surface 11 is large in a plan view of the toilet bowl 10 viewed from above. For this reason, in this flush toilet, the centrifugal force related to the flow A flowing in the position where the bulging portion 11B is provided increases, so that the flow A rides on the surface of the bulging portion 11B and easily flows. For this reason, this flush toilet 1 can wash | clean the surface of the bulging part 11B favorably.

Further, the bulging portion 11B of the flush toilet 1 is formed in the rear region H on the downstream side of the flow A discharged from the spout 11A and flowing through the washing shelf 12 in the front region G or the rear region H. Yes. For this reason, in the flush toilet 1, in the downstream rear region H, the momentum in which the flow A flows is smaller than the flow A immediately after water is discharged from the water outlet 11 A. For this reason, this flush toilet can wash the upright surface 11 in the downstream rear region H by the flow A riding on the surface of the bulging portion 11B.

Also, the bulging portion 11B of the flush toilet 1 is formed with a curved surface that is recessed obliquely outward and downward. For this reason, this flush toilet 1 can flow into the bulging portion 11B with a small resistance, and since the momentum of the flow A is difficult to decrease, the flow A rides on the surface of the bulging portion 11B, and the bulging portion 11B Can flow well on the surface.

Further, the bulging portion 11B of the flush toilet 1 has a shape in which the upper edge gradually increases from the upstream end toward the central portion in the shape seen in the horizontal direction from the inside of the toilet bowl portion 10, and from the central portion to the downstream end. It is getting lower gradually. For this reason, this flush toilet 1 can flow without disturbing the flow A on the surface of the bulging portion 11B and the periphery of the bulging portion 11B.

Also, this flush toilet 1 flows into the recess 10D from the back or side of the recess 10D, turns counterclockwise in the recess 10D, and forms a flow Z that merges with the flow Y. For this reason, this flush toilet 1 can increase the momentum of the swirl flow X formed in the recess 10D by the flow Z joining the flow Y in the recess 10D. Thereby, since the height of the surface of the washing water in the recess 10D can be further increased, a wider range of the recess 10D can be cleaned.

Further, the dimension in the front-rear direction of the inlet 30A of the flush toilet 1 is smaller than half of the dimension in the front-rear direction of the recess 10D at the center in the left-right direction of the recess 10D. For this reason, this flush toilet 1 can keep all the wash water flowing into the recess 10D in the recess 10D without immediately flowing into the drainage channel 30, and raises the level of the wash water in the recess 10D. Therefore, a wider range of the recess 10D can be cleaned.

Moreover, the toilet bowl part 10 of this flush toilet 1 has the washing shelf 12 which the washing water discharged from 11 A of water outlets continues to the upper part of the bowl surface 13, and the bowl surface 13 is a front part. A front concave surface 13H and a front convex surface 13K are formed from the upper part to the lower part at the central portion in the left-right direction of the front side, and the front convex surface is larger than the vertical distance between the vertical central portion of the front convex surface 13K and the cleaning shelf 12. The distance in the vertical direction between the central portion in the vertical direction of 13K and the bottom surface 13L of the recess 10D is larger. For this reason, this flush toilet 1 can increase the momentum of the wash water flowing into the recess 10D. For this reason, since the momentum through which the washing water flows is increased and the momentum of the swirling flow X formed in the recess 10D can be increased, a wider range in the recess 10D can be cleaned.

Also, the flow Y2 that is a part of the flow Y of the flush toilet 1 forms a flow that flows directly into the drainage channel 30. For this reason, this flush toilet 1 can discharge | emit waste etc. favorably by the flow Y2 which flows in into the drainage channel 30 directly.

Further, the flush toilet 1 is the right side when viewed from the front of the toilet bowl 10, and is inwardly directed to the right washing shelf 12B located on the downstream side of the flow A discharged from the spout 11A and flowing through the washing shelf 12. Is the left side when viewed from the front of the toilet bowl 10, and is based on the inward inclination angle of the left washing shelf 12A located on the upstream side of the flow A discharged from the spout 11A and flowing through the washing shelf 12. small. For this reason, this flush toilet 1 makes it difficult for the flow A flowing on the surface of the right washing shelf 12B located on the downstream side to face inward. As a result, the flush toilet 1 can flow the flow A evenly on the surface of the right washing shelf 12B located on the downstream side and reach the rear end of the right washing shelf 12B located on the downstream side. .

Further, the flush toilet 1 is provided on the left washing shelf 12A located on the upstream side of the flow A that is on the left side when viewed from the front of the toilet bowl 10 and is discharged from the spout 11A and flows through the washing shelf 12, The curvature at the first boundary portion 10B that is continuous with the rising surface 11 that is located on the outer peripheral side of the left washing shelf 12A is the right side when viewed from the front of the toilet bowl 10, and the washing shelf is discharged from the spout 11A. The curvature is smaller than the curvature at the first boundary portion 10B that is provided on the right washing shelf 12B located on the downstream side of the flowing flow A and continues to the rising surface 11 located on the outer peripheral side of the right washing shelf 12B. For this reason, this flush toilet 1 flows through the surface of the first boundary portion 10B that is provided on the left washing shelf 12A located on the upstream side and continues to the rising surface 11 that is located on the outer peripheral side of the left washing shelf 12A. The flow A can flow in the inward direction by flowing down the first boundary portion 10B.

In addition, the flush toilet 1 is formed on the right side when viewed from the front of the toilet bowl 10, and the shelf width of the right washing shelf 12 B located on the downstream side of the flow A discharged from the spout 11 A and flowing through the washing shelf 12. However, the upstream side is larger than the central portion in the direction in which the flow A flows. For this reason, this flush toilet 1 can make the flow A easily flow into the right washing shelf 12B located on the downstream side from the left washing shelf 12A located on the upstream side.

In addition, the flush toilet 1 is on the right side when viewed from the front of the toilet bowl 10, and the right washing shelf 12 B located on the downstream side of the flow A discharged from the spout 11 A and flowing through the washing shelf 12 is a toilet bowl. This is the left side when viewed from the front of the unit 10 and is higher than the left side cleaning shelf 12A located upstream of the flow A discharged from the water outlet 11A and flowing through the cleaning shelf 12. For this reason, the flush toilet 1 can wash the upright surface 11 to a predetermined height even in the right washing shelf 12B located on the downstream side.

Further, the flush toilet 1 is on the left side when viewed from the front of the toilet bowl 10, and the shelf width of the left washing shelf 12A located on the upstream side of the flow A discharged from the spout 11A and flowing through the washing shelf 12 is the same. , Formed with a predetermined shelf width. For this reason, this flush toilet 1 can suppress appropriately flowing down from the left washing shelf 12A located on the upstream side. Thereby, it is possible to better secure the amount of cleaning water necessary for cleaning the right cleaning shelf 12B located on the downstream side.

The flush toilet 1 is a rear washing shelf 12C located on the right side when viewed from the front of the toilet bowl 10 and located downstream of the flow A discharged from the spout 11A and flowing through the washing shelf 12, The shelf width gradually increases from the upstream side to the rear left and right center of the toilet bowl 10 from the rear left and right center of the toilet bowl 10. For this reason, this flush toilet 1 can flow and wash the surface of the rear washing shelf 12C evenly while suppressing the flow A flowing on the surface of the rear washing shelf 12C from flowing inward.

The toilet bowl 10 of the flush toilet 1 has a bowl surface 13 that is continuous with the inner periphery of the washing shelf 12, and is on the right side when viewed from the front of the toilet bowl 10, and is discharged from the spout 11A. The second boundary portion 10C between the right washing shelf 12B located on the downstream side of the flow A flowing through the washing shelf 12 and the bowl surface 13 is the rear washing shelf 12C, and is from the rear center of the toilet bowl portion 10. Further, the degree of protrusion inside the second boundary portion 10C on the upstream side is smaller than the degree of protrusion inside the second boundary portion 10C at the center portion in the front-rear direction of the right cleaning shelf 12B. For this reason, when the flush toilet 1 is the right washing shelf 12B located on the downstream side and the flow A flows from the right washing shelf 12B in the center in the front-rear direction of the toilet bowl 10 toward the rear side, It will flow toward 12 C of back side washing shelves which the degree which protrudes inside 2 boundary part 10C is small. Then, when the flow A reaches the second boundary portion 10C of the rear cleaning shelf 12C, the flow E flows down the second boundary portion 10C and flows inward. Then, the flow E flows toward the rear left and right center of the toilet bowl 10 while flowing down in the inward direction. Thereby, since the flow E can be made to flow to the rear left and right central part of the toilet bowl 10, the rear left and right central part of the toilet bowl 10 can be washed with the flow E.

Moreover, this flush toilet 1 is the right side when viewed from the front of the toilet bowl 10, the right side wash shelf 12B located on the downstream side of the flow A discharged from the spout 11A and flowing through the wash shelf 12, and the bowl surface 13C is the rear part of the right washing shelf 12B, and the curvature radius of the second boundary part 10C on the upstream side of the rear left and right central part of the toilet bowl 10 is the longitudinal direction of the toilet bowl 10 This is larger than the radius of curvature of the second boundary portion 10C in the right-side cleaning shelf 12B at the center. For this reason, when this flush toilet 1 is the right side wash shelf 12B where the flow A is located on the downstream side and flows from the right side wash shelf 12B in the center in the front-rear direction of the toilet bowl 10 toward the rear side, Will flow toward the rear cleaning shelf 12C where the large second boundary portion 10C is located. When the flow A reaches the second boundary portion 10C having a large curvature radius of the rear cleaning shelf 12C, the flow A flows down the second boundary portion 10C and flows inward. Then, the flow E flows toward the rear left and right center of the toilet bowl 10 while flowing down in the inward direction. Thereby, since the flow E can be made to flow to the rear left and right central part of the toilet bowl 10, the rear left and right central part of the toilet bowl 10 can be washed with the flow E.

Further, the toilet bowl portion 10 of the flush toilet 1 is connected to the rising surface 11 rising continuously from the outer peripheral edge of the cleaning shelf 12, the cleaning shelf 12 and the rising surface 11, and is a rear cleaning shelf 12C. And a bulging portion 11B that swells upward continuously from the outer peripheral edge on the upstream side of the rear left and right central portion of the pot portion 10. For this reason, in this flush toilet 1, the flow A that has flowed through the bulging portion 11 B changes to an inward flow D. Thereby, since the flow D can also be flowed to the rear left and right center part of the toilet bowl part 10, the rear left and right center part of the toilet bowl part 10 can be wash | cleaned more favorably.

In addition, the bowl surface 13 of the flush toilet 1 is formed of a first left concave surface 13F having a left upper portion recessed outward in the vertical direction, and a right upper portion formed of a right convex surface 13J protruding inward in the vertical direction. Yes. For this reason, this flush toilet 1 can increase the momentum flowing downward in the flow B flowing down the first left concave surface 13F. Thereby, the flow B flowing down the first left concave surface 13F flows into the concave portion 10D from the left side, and the washing water, filth, etc. in the concave portion 10D can be agitated. In addition, since the flush toilet 1 can suppress the downward force of the flow E flowing through the right convex surface 13J, the time until the flow E flows into the concave portion 10D can be made longer. Thereby, the flow E flowing through the right convex surface 13J can flow over a wider range of the bowl surface.

Further, the right convex surface 13J of the flush toilet 1 is formed behind the central portion in the front-rear direction in the central portion in the left-right direction of the concave portion 10D. For this reason, this flush toilet 1 can easily cause the flow E flowing through the right convex surface 13J to reach the rear side of the concave portion 10D. For this reason, since the flow E can flow down more to the rear side of the recessed part 10D, the rear side of the recessed part 10D can be cleaned more favorably.

Also, the bowl surface 13 of the flush toilet 1 has a right concave surface 13M that is recessed outwardly in front of the right convex surface 13J in the horizontal cross-sectional shape at the top. For this reason, in the flush toilet 1, when the flow Y reaches the right convex surface 13J after flowing through the right concave surface 13M, the flow Y flows toward the central portion of the concave portion 10D while leaving the surface of the right convex surface 13J. Can do. That is, as compared with the case where the flow Y flows into the concave portion 10D along the bowl surface 13, the momentum of flowing downward in the flow Y can be increased. Thereby, the washing water, filth, etc. in recessed part 10D can be stirred more favorably.

Moreover, this flush toilet 1 forms the flow Y in which the wash water discharged from the spout 11A flows down the right side of the bowl surface 13 and flows into the recess 10D from the front of the recess 10D. For this reason, this flush toilet 1 can form a swirl flow X swirling in the recess 10D. Thereby, the position of the water storage surface W in the recess 10D is raised, and a wider range of the recess 10D can be cleaned.

Further, the flush toilet 1 is formed such that the first left concave surface 13F is recessed outward and the left convex surface 13G protrudes inward in the vertical cross-sectional shape. For this reason, after the flow B reaches the left convex surface 13G after flowing through the first left concave surface 13F, the flow B is less likely to move forward. For this reason, the flow B that has reached the left convex surface 13G can flow down the left convex surface 13G and flow into the left side of the concave portion 10D, and agitate the cleaning water, filth, and the like in the concave portion 10D.

Moreover, the bowl surface 13 of the flush toilet 1 includes a second left concave surface 13P formed to be recessed outwardly on the upper side of the left convex surface 13G in the vertical cross-sectional shape. For this reason, after the flow B reaches the second left concave surface 13P after flowing through the first left concave surface 13F, the flow B is guided to the front side of the bowl surface 13 by the second left concave surface 13P and the left convex surface 13G. That is, the flow B flowing through the second left concave surface 13P can be suppressed from decreasing in the forward direction and can flow to the front side of the bowl surface 13.

Further, the left convex surface 13G of the flush toilet 1 is formed in front of the central portion in the front-rear direction in the central portion in the left-right direction of the concave portion 10D. For this reason, in this flush toilet 1, the flow B flowing forward through the second left concave surface 13 P is better guided to the front side of the bowl surface 13 by the left convex surface 13 G. That is, the flow B flowing through the second left concave surface 13P is suppressed from decreasing in the forward direction, and can flow more favorably on the front side of the bowl surface 13.

The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Example 1, the bulging portion is formed on the right rear side of the vertical surface, but may be provided on the front left side of the vertical surface.
(2) In Example 1, the front side of the left cleaning shelf and the front side of the right cleaning shelf are formed separately from each other, but the front side of the left cleaning shelf and the front side of the right cleaning shelf may be formed continuously. .
(3) Although the cleaning tank that stores the cleaning water is illustrated in the first embodiment, the cleaning water may be directly discharged from the water supply source through the on-off valve without providing the cleaning tank.
(4) In Example 1, the bulging portion is formed with a curved surface that is curved and recessed obliquely outward and downward, and is formed so as to smoothly connect the cleaning shelf and the standing surface. You may form in the inclined surface inclined toward the upper direction.
(5) In Example 1, it was illustrated that water was discharged into the toilet bowl from the water outlet provided on the elevation via the water discharge pipe, but water was introduced directly from the washing tank to the water outlet without providing the water discharge pipe. May be.
(6) In Example 1, the first boundary portion is formed with a curved surface that is recessed obliquely outward and downward, and is formed so as to smoothly connect the cleaning shelf and the upright surface. May be formed by an inclined surface inclined obliquely upward and outward.
(7) In Example 1, the second boundary portion is formed so as to smoothly connect both the left and right sides of the second bowl surface, the right edge on the front side of the left washing shelf, and the left edge on the front side of the right washing shelf. However, the second boundary portion may be formed by an inclined surface inclined obliquely inward and downward.
(8) In Example 1, the elevation surface is continuously raised to the outer peripheral edge of the cleaning shelf via the first boundary portion, but the elevation surface is formed so as to cover the cleaning shelf in a plan view from above. May be.
(9) In Example 1, the spout is provided on the left side when the flush toilet is viewed from the front end side, and is opened in the front-rear direction on the rear side of the vertical surface. It may be provided. Two or more water outlets may be provided.
(10) In Example 1, the bowl surface is formed between the front side of the left side cleaning shelf and the front side of the right side cleaning shelf, but the front side of the left side cleaning shelf and the front side of the right side cleaning shelf are continuously connected by the cleaning shelf. May be formed.
(11) In Example 1, the bulging portion is formed in the rear region where the curvature of the upper edge of the vertical surface is increased in plan view as viewed from above, but the curvature of the upper edge of the vertical surface changes. You may provide in a part. Further, the bulging portion may be formed in a front region where the curvature of the upper edge of the vertical surface is large in a plan view viewed from above.
(12) In Example 1, the dimension in the front-rear direction of the inlet is smaller than half of the dimension in the front-rear direction of the recess, but the dimension in the front-rear direction of the inlet is smaller than half of the dimension in the front-rear direction of the recess. You may enlarge it.
(13) In Example 1, the width of the right cleaning shelf is larger on the upstream side than the central portion in the direction in which the cleaning water flows, but the central shelf in the direction in which the cleaning water flows in the right cleaning shelf. The width may be the same as the upstream shelf width.
(14) In Example 1, the first left-side concave surface is formed to be recessed outward, but a surface formed in a straight line in the vertical direction may be provided on the bowl surface instead of the first left-side concave surface.
(15) In Example 1, the first left-side concave surface and the second left-side concave surface are formed to be recessed outward, but the surface formed in a straight line in the vertical direction instead of the first left-side concave surface is a bowl surface. It may be provided.
(16) In Example 1, the left convex surface is formed in front of the central portion in the front-rear direction in the central portion in the left-right direction of the concave portion, but the left convex surface is the central portion in the front-rear direction in the central portion in the left-right direction of the concave portion. You may form from to the front. In this case, the amount of washing water guided to the front side of the bowl surface by the left convex surface can be increased, reaches the left convex surface, flows down the left convex surface, and flows into the left side of the concave portion. The amount of water can be reduced. That is, by changing the length in the front-rear direction in which the left convex surface is formed, the amount of cleaning water guided to the front side of the bowl surface and the amount of cleaning water flowing downward and flowing into the left side of the concave portion are reduced. It can be adjusted to the desired amount.

10: Toilet bowl part 10B ... First boundary part (first boundary part)
10C ... 2nd boundary part (2nd boundary part)
DESCRIPTION OF SYMBOLS 10D ... Concave part 11 ... Elevation surface 11A ... Water discharge port 11B ... Swelling part 12 ... Washing shelf 12A ... Left washing shelf (washing shelf located in the upstream of the washing water which flows through a washing shelf)
12B ... right side wash shelf (wash shelf located downstream of wash water flowing through the wash shelf)
12C ... Rear wash shelf (rear part of wash shelf)
13 ... bowl surface 13F ... first left concave surface (first concave surface)
13G ... left convex surface (third convex surface)
13H: Front concave surface (third concave surface)
13J: Right convex surface (second convex surface)
13K: Front convex surface (first convex surface)
13L ... Bottom surface 13M ... Right concave surface (second concave surface)
13P ... Second left concave surface (fourth concave surface)
30 ... Drainage channel 30A ... Inlet G ... Front region H ... Rear region Y ... First mainstream (mainstream)
Y1 ... flow (first mainstream)
Y2 ... flow (flow that flows directly into the drainage channel)
Z, B ... Flow (second mainstream)

Claims

A spout for discharging wash water,
A washing shelf formed on the inner upper part of the toilet bowl, through which washing water discharged from the water outlet flows,
An elevation that rises continuously on the outer periphery of the cleaning shelf;
Connected to the cleaning shelf and the elevation surface, and a bulging portion that swells upward;
A flush toilet comprising a toilet bowl having a stool.
The swell according to claim 1, wherein the bulging portion is formed in a front region or a rear region where the curvature of the vertical surface is large in a plan view of the toilet bowl as viewed from above. Toilet bowl.
The bulging portion is formed in the front region or the rear region on the downstream side of the cleaning water which is discharged from the water outlet and flows through the cleaning shelf in the front region or the rear region. The flush toilet according to claim 2, wherein the toilet bowl is a flush toilet.
The flush toilet according to any one of claims 1 to 3, wherein the bulging portion is formed as a curved surface that is recessed obliquely outward and downward.
In the shape of the bulging portion seen in the horizontal direction from the inside of the toilet bowl, the upper edge gradually increases from the upstream end toward the central portion, and gradually decreases from the central portion toward the downstream end. The flush toilet according to any one of claims 1 to 4, wherein the flush toilet bowl is provided.
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
Wash water discharged from the water outlet flows down the bowl surface, flows into the recess from the front of the recess, collides with the bottom surface, and forms a first main flow that flows toward the upper rear side of the recess. A flush toilet bowl.
The water washing according to claim 6, wherein a second main flow that flows into the concave portion from the rear or side of the concave portion and turns laterally in the concave portion to form a second main flow that merges with the first main flow. Toilet bowl.
The flush toilet according to claim 6 or 7, wherein a dimension in the front-rear direction of the inflow port is smaller than a half of a dimension in the front-rear direction of the recess at a central portion in the left-right direction of the recess.
The toilet bowl is continuous with the upper part of the bowl surface, and has a washing shelf through which washing water discharged from the water outlet flows.
The bowl surface is formed with a third concave surface and a first convex surface from the upper part to the lower part in the center part in the left-right direction of the front part.
The vertical distance between the vertical center of the first convex surface and the bottom surface of the concave portion is greater than the vertical distance between the vertical central portion of the first convex surface and the cleaning shelf. 9. A flush toilet according to any one of claims 6 to 8.
The flush toilet according to any one of claims 6 to 9, wherein a part of the first main flow forms a flow that directly flows into the drainage channel.
A spout for discharging wash water,
A washing shelf formed on the inner upper part of the toilet bowl, through which washing water discharged from the water outlet flows,
It has a toilet bowl with
The shelf width of the washing shelf located on the upstream side of the wash water that is discharged from the water outlet and flows through the washing shelf when viewed from the front of the toilet bowl portion is the front of the toilet bowl portion. A flush toilet, which is on the other side of the left and right as viewed from the top, and is larger than the width of the washing shelf positioned downstream of the washing water discharged from the water outlet and flowing through the washing shelf.
The inclination angle in the inward direction of the washing shelf that is located on the other side of the left and right as viewed from the front of the toilet bowl and is downstream of the washing water that is discharged from the water outlet and flows through the washing shelf, One of the left and right sides as viewed from the front of the bowl part, characterized in that it is smaller than the inclining angle in the inward direction of the cleaning shelf located on the upstream side of the cleaning water discharged from the water outlet and flowing through the cleaning shelf. The flush toilet according to claim 11.
One of the left and right sides as viewed from the front of the toilet bowl, provided on the washing shelf located upstream of the washing water discharged from the water outlet and flowing through the washing shelf, and on the outer peripheral side of the washing shelf The curvature at the first boundary part that is continuous with the rising surface that is positioned is the other side of the left and right as viewed from the front of the toilet bowl, and is downstream of the wash water that is discharged from the spout and flows through the wash shelf The flush toilet bowl according to claim 11 or 12, wherein the toilet bowl is smaller in curvature than a first boundary portion that is provided on the washing shelf located at the outer peripheral side of the washing shelf and is continuous with an upstanding surface. .
The width of the wash shelf located on the downstream side of the wash water that is discharged from the spout and flows through the wash shelf as viewed from the front of the toilet bowl is the direction in which the wash water flows. The flush toilet bowl according to any one of claims 11 to 13, wherein an upstream side is larger than a central portion.
When viewed from the front of the toilet bowl, the washing shelf is located on the other side of the left and right as viewed from the front of the toilet bowl, and is located downstream of the wash water discharged from the water outlet and flowing through the washing shelf. 15. The apparatus according to claim 11, wherein the position is higher than the cleaning shelf located on the upstream side of the cleaning water that is discharged from the water outlet and flows through the cleaning shelf. A flush toilet according to 1.
The shelf width of the washing shelf located on the upstream side of the washing water that is discharged from the water outlet and flows through the washing shelf as viewed from the front of the toilet bowl is maintained at a predetermined shelf width. The flush toilet bowl according to any one of claims 11 to 15, wherein the flush toilet bowl is formed.
A spout for discharging wash water,
A washing shelf formed on the inner upper part of the toilet bowl, through which washing water discharged from the water outlet flows,
It has a toilet bowl with
The rear of the washing shelf and the shelf width of the washing shelf located on the upstream side of the rear left and right center of the toilet bowl, and / or the left and right sides when viewed from the front of the toilet bowl, The shelf width of the downstream end of the wash shelf located on the downstream side of the wash water discharged from the spout and flowing through the wash shelf is the left and right sides when viewed from the front of the toilet bowl, A flush toilet, characterized in that the flush toilet is smaller than the width of the washing shelf at the center in the front-rear direction of the toilet bowl located on the downstream side of the washing water discharged from the water outlet and flowing through the washing shelf.
It is one side of right and left seeing from the front of the toilet bowl part, and is a rear part of the washing shelf located on the downstream side of the washing water discharged from the water outlet and flowing through the washing shelf, and after the toilet bowl part 18. The flush toilet bowl according to claim 17, wherein the shelf width gradually increases from the upstream side to the rear left and right center part rather than the side right and left center part.
The toilet bowl has a continuous bowl surface on the inner periphery of the washing shelf;
The second boundary part between the bowl surface and the washing shelf located on the downstream side of the washing water that is discharged from the water outlet and flows through the washing shelf as viewed from the front of the toilet bowl Is a rear portion of the washing shelf, and the degree of protrusion to the inside of the second boundary portion on the upstream side of the rear left and right central portion of the toilet bowl portion is the first in the central portion in the front-rear direction of the washing shelf. The flush toilet bowl according to claim 17 or 18, wherein the flush toilet bowl is smaller than a degree of protrusion inside the two boundary portions.
The second boundary between the bowl surface and the washing shelf located on the downstream side of the washing water that is discharged from the water outlet and flows through the washing shelf as viewed from the front of the toilet bowl portion The portion is a rear portion of the washing shelf, and the radius of curvature of the second boundary portion on the upstream side of the rear left and right center portion of the toilet bowl portion is the center of the toilet bowl portion in the front-rear direction. The flush toilet according to claim 19, wherein the flush toilet is larger than a radius of curvature of the second boundary portion.
The toilet bowl portion is an upright surface that rises continuously on the outer periphery of the washing shelf;
Connected to the washing shelf and the elevation surface, and a bulging part that is the rear part of the washing shelf and swells upward continuously from the outer peripheral edge on the upstream side of the rear left and right center part of the toilet bowl part,
The flush toilet according to any one of claims 17 to 20, wherein the flush toilet bowl is provided.
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
The toilet bowl is characterized in that, at the upper end of the rear part, the left and right sides of the toilet bowl are steeper than the other side when viewed from the front of the toilet bowl.
The bowl surface is formed by a first concave surface in which the central portion in the vertical direction on the left and right sides is recessed outward in the vertical direction, and the central portion in the vertical direction on the other side is formed by the second convex surface protruding inward in the vertical direction. The flush toilet according to claim 22, wherein the flush toilet bowl is provided.
The flush toilet according to claim 23, wherein the second convex surface is formed rearward of a central portion in the front-rear direction at a central portion in the left-right direction of the concave portion.
25. A flush toilet according to claim 23 or 24, wherein the bowl surface has a second concave surface recessed outwardly in front of the second convex surface in a horizontal cross-sectional shape at an upper portion.
26. The cleaning water spouted from the spout forms a main flow that flows down the left and right sides of the bowl surface and flows into the recess from the front of the recess. The flush toilet bowl according to Item.
Bowl surface,
A recess formed at the bottom of the bowl surface and having a bottom surface;
A spout for supplying cleaning water to the bowl surface;
A toilet bowl,
And a flush toilet equipped with a continuous drainage channel at the inlet formed at the rear of the bottom of the recess,
In the cross-sectional shape in the horizontal direction, the rear part of the bowl surface on one side of the left and right sides as viewed from the front of the toilet bowl part is a first concave surface that is recessed outward, and a third convex surface that protrudes inward on the front side from the first concave surface. A flush toilet comprising a flush toilet.
28. The flush toilet according to claim 27, wherein in the vertical cross-sectional shape, the first concave surface is formed to be recessed outward, and the third convex surface is formed to protrude inward.
29. The water-washing type according to claim 27 or 28, wherein in the cross-sectional shape in the vertical direction, the bowl surface has a fourth concave surface formed to be recessed outwardly above the third convex surface. Toilet bowl.
30. The flush toilet according to any one of claims 27 to 29, wherein the third convex surface is formed in front of a central portion in the front-rear direction at a central portion in the left-right direction of the concave portion.
31. The cleaning water discharged from the water outlet forms a main flow that flows down the left and right sides of the bowl surface and flows into the concave portion from the front of the concave portion. The flush toilet bowl according to Item.