JP7201561B2 - flush toilet - Google Patents

Description

The present invention relates to flush toilets.

2. Description of the Related Art Conventionally, various studies have been made on cleaning methods for cleaning the inside of a toilet bowl. In Patent Document 1, a first spout is provided on the rear side of the toilet bowl and on one of the left and right sides, and a second spout is provided on the rear side of the toilet bowl and on the other side of the toilet bowl. A urinal is suggested. In this flush toilet, the flush water discharged from each spout flows into the concave portion of the toilet bowl, and the accumulated water in the concave portion is agitated in the vertical direction. It is described that such agitation of water accumulated in the concave portion makes it possible to sink the contaminants in the concavity so that the contaminants can be easily discharged, thereby improving the contaminant discharging performance.

Japanese Patent No. 5553188

As a result of studying the structure of Patent Literature 1, the inventor of the present invention has come to recognize the following problems. The flush toilet disclosed in Patent Document 1 has a structure in which the flush water flows from each spout to the entrance of the drain pipe, and has a long path. Therefore, the cleansing water discharged from the spout reaches the recess while the force of the water is relatively weakened. For this reason, the water force for washing the wastes away into the drainage pipe tends to be insufficient, and there is room for improvement in terms of the wastes discharge performance.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and an object thereof is to provide a flush toilet capable of obtaining good waste discharge performance.

In order to solve the above-mentioned problems, a flush toilet according to one aspect of the present invention includes a toilet bowl, a drain passage communicating with the toilet bowl through an inlet formed in the bottom of the toilet bowl, and a toilet bowl body having a water discharge part for discharging flush water to the toilet bowl part, the toilet bowl part having a receiving surface part for receiving waste and a rim part connected to the upper edge of the receiving surface part; The water discharge portion has two water discharge ports formed in the rim portion, and discharges cleansing water from the two water discharge ports into the toilet bowl portion to one side in the circumferential direction. It has two divided areas divided by the front-rear center line that bisects the front-rear dimension of the inner surface part of the water outlet, and the two spouts have a second divided area formed in one of the two divided areas A first water outlet and a second water outlet formed in the divided area on the front side are included, and the water outlet unit joins cleansing water discharged from the first water outlet and cleansing water discharged from the second water outlet. configured to form a main flow towards the inlet.
According to this aspect, the main flow toward the inlet of the drain passage portion is formed by the confluence of the wash water discharged from the first water outlet and the wash water discharged from the second water outlet. Since the second water outlet is located in the front divided area, the path through which the cleansing water flows from the second water outlet to the inlet of the drainage passage can be made shorter than when it is provided in the rear divided area. As a result, the water force of the main stream formed by the flush water discharged from the second spout becomes strong, and the strong water force pushes the filth in the toilet bowl to the entrance of the drainage passage, resulting in good filth discharge performance. will be obtained.

In the above aspect, the water discharger may have a third water discharge port formed in the rim portion in the rear divided region of the two divided regions.

In the aspect described above, the first, second, and third water outlets are arranged in order in one of the circumferential directions, and the water discharger has a total washing water discharge amount of the first water outlet and the second water outlet. , the discharge amount of washing water from the third water outlet.
According to this aspect, it can be expected that half or more of the total amount of washing water used in one washing operation is used for forming the main stream. Therefore, the flow rate of the strong water force can be increased, and by the strong water force and large flow rate of the main stream, the filth in the toilet bowl is washed away to the entrance of the drainage passage, so that particularly good filth discharge performance can be obtained.

In the above aspect, the water discharge section may be configured such that cleansing water is discharged from the second water outlet after cleansing water is discharged from the first water outlet and the third water outlet.
By increasing the ratio of the main flow rate to the total amount of wash water used in one washing operation, the dirt discharge capacity can be increased without increasing the total amount of wash water. According to this aspect, it is possible to reduce the amount of cleansing water that is discharged from the second water outlet and flows into the inlet without joining, so that the ratio of the main flow rate to the total amount of cleansing water can be increased. Therefore, the filth discharge performance can be improved by increasing the proportion of the mainstream flow rate.

In the above-described aspect, the toilet bowl portion has four divided regions divided by a left-right center line that bisects the left-right dimension of the outer surface portion of the toilet body and a front-rear center line in a plan view. The spout may be formed in one of the two front divided areas in the circumferential direction.
According to this aspect, the flush water discharged from the second spout can flow toward the inlet of the drainage passage without passing through the inner peripheral surface region located at the center of the right and left of the toilet bowl having a small radius of curvature. become. Therefore, the main stream formed by the wash water discharged from the second spout is less likely to weaken due to the centrifugal force, and the second spout is formed in the divided region located in the other of the two front divided regions in the circumferential direction. It is possible to obtain a better waste discharge capacity than to do.

In the above-described aspect, in the water discharger, the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port join on the inner peripheral surface of the toilet bowl to form a main flow toward the inlet. may be configured to
According to this aspect, the inner peripheral surface of the toilet bowl can be washed by the strong current of water, and good toilet bowl washing performance can be obtained.

In the above-described aspect, the toilet bowl portion has four divided regions divided by a left-right center line that bisects the left-right dimension of the outer surface portion of the toilet body and a front-rear center line in a plan view. The water discharge port is formed in a divided region located on one side in the circumferential direction of the two front divided regions, and the water discharge section has a water passage for supplying cleansing water to the second water discharge port, and the water passage includes: Of the left and right side portions of the rim portion, one side in the circumferential direction may be formed so as to extend along the front-rear direction on the back side of the side portion on the side where the divided region is located.
According to this aspect, the water passage can be arranged in such a layout that it does not pass through the rear side of the lateral center position of the front portion of the rim portion. Therefore, the water passage for supplying cleansing water to the second spout can be shortened rather than arranging the water passage through the rear side of the center position in the left-right direction of the front portion of the rim portion. You will be able to spit out strong cleansing water from the spout. As a result, it becomes possible to obtain a better dirt discharge capacity.

ADVANTAGE OF THE INVENTION According to this invention, the flush toilet bowl which can obtain favorable waste discharge capacity can be provided.

It is a side cross-sectional view of the flush toilet according to the embodiment. 1 is a plan view of a flush toilet according to an embodiment; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; It is a figure for demonstrating the right-and-left centerline of a toilet bowl main body, and the front-back centerline of a toilet bowl part. It is a figure which shows how the washing water flows in the early stage within the toilet bowl part which concerns on embodiment. It is a figure which shows how the washing water flows in the middle stage within the toilet bowl part which concerns on embodiment. FIG. 11 is another diagram showing how flush water flows in the toilet bowl portion according to the embodiment at an intermediate stage; FIG. 10 is a diagram showing the inner circumference lengths of the first to third rim water conduits of the rim portion; It is a figure which shows how small water propagates, Fig.9 (a) is a figure which shows the toilet bowl main body which concerns on a 1st modification, and FIG.9(b) is a figure which shows the toilet bowl main body which concerns on embodiment. It is a figure for demonstrating the centrifugal force given to wash water. FIG. 11(a) is a diagram showing the structure around the second outlet according to the embodiment, and FIG. 11(b) is a diagram showing the structure around the second outlet according to the second modification. It is a figure which shows the structure around a 3rd spout. FIG. 10 is a schematic diagram showing an example of a pattern of arrangement of spouts that can provide the effect (1). FIG. 10 is a schematic diagram showing an example of a pattern of arrangement of the spouts that provides the effect (2).

Hereinafter, in the embodiments and modified examples, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted. Also, in each drawing, for convenience of explanation, some of the constituent elements are omitted as appropriate.

FIG. 1 is a side sectional view of a flush toilet 10 according to this embodiment, and FIG. 2 is a plan view of the flush toilet 10. As shown in FIG.
The flush toilet bowl 10 has a toilet body 12 made of ceramics. The toilet bowl body 12 is a wall-mounted toilet bowl that is attached in a state of being hung on the side wall surface 100 of the toilet room. Above the toilet bowl main body 12, although not shown, a box containing a warm-water washing device such as a private washing device, and a toilet lid and a toilet seat supported by the box so as to be vertically rotatable are arranged.

As shown in FIG. 1, the toilet bowl body 12 has a toilet bowl portion 14 formed in the front portion of the toilet bowl body 12 and an inlet 16 (see also FIG. 2) formed in the bottom portion of the toilet bowl portion 14. and a trap portion 18 communicating with the inside of 14 . The trap part 18 forms a part of the drainage passage part 20 for discharging the filth in the toilet bowl part 14 to a sewer side waterway (not shown). In addition to the trap portion 18, the drain passage portion 20 includes a connecting pipe 22 connected to the downstream end portion of the trap portion 18, through which filth is discharged to the sewage channel. Sealing water 24 is stored in the trap portion 18 to block the flow of air in the direction of water flow, and the sealing water 24 prevents backflow of odors from the sewer side waterway.

FIG. 3 shows a cross-sectional view taken along line AA of FIG.
As shown in FIGS. 1 and 3, the toilet bowl portion 14 is formed in an elliptical shape such that the front-rear dimension is larger than the left-right dimension in plan view. The toilet bowl portion 14 includes a receiving surface portion 26 for receiving waste, a rim portion 28 connected to the upper edge portion of the receiving surface portion 26 and forming the upper edge portion of the toilet bowl portion 14, and a lower edge portion of the receiving surface portion 26. and a recessed portion 30 that is recessed downward from the portion.

The receiving surface portion 26 and the recessed portion 30 are provided continuously in an annular shape. The receiving surface portion 26 is formed so as to slope downward toward the center of the ring. The recess 30 is formed in a bottomed shape, and the inlet 16 of the trap section 18 opens at the bottom thereof. A portion of the seal water 24 is stored in the recess 30 .

The rim portion 28 is formed with three water outlets 32A to 32C (described later). The rim portion 28 has three rim water conduits 34A-34C formed to extend in the circumferential direction of the toilet bowl portion 14 from each of the three spouts 32A-32C. Hereinafter, the water outlets 32A to 32C will be collectively referred to as the "water outlet 32", and the rim waterways 34A to 34C will be collectively referred to as the "rim waterway 34".

The rim conduit 34 is formed to guide the wash water discharged from the water spout 32 so as to swirl. As shown in FIG. 1, the rim water conduit 34 includes a shelf portion 34a extending from the upper edge 26a of the receiving surface portion 26 toward the outside of the toilet bowl portion 14, a standing wall portion 34b rising from the outer peripheral end portion of the shelf portion 34a, An overhang portion 34c extending toward the inside of the toilet bowl portion 14 from the upper end portion of the standing wall portion 34b is provided. As shown in FIG. 3, the radial dimension of the shelf portion 34a is formed so as to become shorter with increasing distance from the spout 32 in a swirling flow swirling direction Da (described later). The same applies to the overhang portion 34c. As a result, the cleansing water discharged from the water discharge port 32 gradually flows down to the receiving surface portion 26 as it moves away from the water discharge port 32 .

The three rim water conduits 34 include first rim water conduits 34A to third rim water conduits 34C corresponding to the three first water outlets 32A to third water outlets 32C, respectively. The first rim water conduit 34A is formed to extend in the swirl direction Da from the first water outlet 32A to the end position 34Aa near and inside the second water outlet 32B in plan view. be done. The second rim water conduit 34B is formed to extend in the swirl direction Da from the second water outlet 32B to the end position 34Ba near and inside the third water outlet 32C. The third rim water conduit 34C is formed so as to extend from the third water outlet 32C to the terminal position 34Ca, with a terminal position 34Ca near and inside the first water outlet 32A. Each of the rim water conduits 34A to 34C is formed to extend over at least 1/4 of the angle range around the center point Cp (described later) of the toilet bowl 14. As shown in FIG.

FIG. 4 is a diagram for explaining the left-right center line La of the toilet body 12 and the front-rear center line Lb of the toilet bowl portion 14 .
The lateral centerline La of the toilet body 12 is a straight line that bisects the lateral dimension Lx of the outer surface portion of the toilet body 12 and extends in the front-rear direction in plan view. Specifically, a straight line that bisects the lateral dimension Lx from the left end position 12L to the right end position 12R of the outer surface portion of the toilet body 12 is the lateral center line La. In addition, the front-rear center line Lb of the toilet bowl 14 bisects the front-rear dimension Ly of the inner surface portion of the toilet bowl 14 in a plan view of a horizontal cross section passing through the water outlets 32A to 32C of the toilet bowl 14. A straight line extending in the left-right direction. Specifically, a straight line that bisects the front-rear dimension Ly from the front end position 14F to the rear end position 14R of the inner surface portion of the toilet bowl portion 14 is the front-rear center line Lb. Note that the centerline Cp of the toilet bowl portion 14 described above refers to the intersection of the left-right centerline La and the front-rear centerline Lb.

The toilet bowl portion 14 described above has four divided regions Sr1 to Sr4 that are divided by the left-right center line La and the front-rear center line Lb of the toilet bowl portion 14 in plan view. Hereinafter, among the four divided regions, the divided region on the rear side of the front-rear center line Lb and on the right side of the left-right center line La is referred to as a first divided region Sr1. Among the four divided regions, the divided regions located counterclockwise in plan view from the first divided region Sr1 are designated as the second divided region Sr2, the third divided region Sr3, and the fourth divided region Sr4. The second divided region Sr2 and the third divided region Sr3 are divided regions on the front side, and the first divided region Sr1 and the fourth divided region Sr4 are divided regions on the rear side.

Returning to FIG. 3, the toilet body 12 further includes a water discharger 36 having the three water discharge ports 32A to 32C described above. The water discharge portion 36 has a water passage portion 38, which will be described later, in addition to the three water discharge ports 32A to 32C. The water discharge portion 36 discharges cleansing water along the inner peripheral surface of the rim portion 28 from the three water discharge ports 32A to 32C in the swirl direction Da. The water discharger 36 discharges cleansing water into the toilet bowl 14 from the water discharge ports 32A to 32C, thereby forming a unidirectional swirling flow in the toilet bowl 14 . In this embodiment, a swirling flow is formed that swirls to one side Da (counterclockwise direction) in the circumferential direction of the toilet bowl portion 14 . Hereinafter, this one side Da in the circumferential direction is referred to as a swirling flow swirling direction Da.

The three spouts 32A to 32C are individually formed in each of the three divided regions of the four divided regions Sr1 to Sr4 of the toilet bowl 14. As shown in FIG. Specifically, the three water discharge ports 32A to 32C include a first water discharge port 32A positioned in the first divided region Sr1, a second water discharge port 32B positioned in the third divided region Sr3, and a water discharge port 32B positioned in the fourth divided region Sr4. A third spout 32C is included. All of the water outlets 32A to 32C are formed to open in the swirling flow swirling direction Da.

The water passage portion 38 is a portion of a hollow structure arranged on the back side of the rim portion 28 (diametrically outside of the toilet bowl portion 14). The water passage portion 38 communicates with each of the water outlets 32A to 32C, and serves as a path for washing water supplied to each of the water outlets 32A to 32C. The water conduit 38 has an inflow channel 38a, a right water channel 38b (first water channel), and a left water channel 38c (second water channel). The inflow path 38 a is arranged behind and behind the rim portion 28 . The right water passage 38b is arranged on the back side of one of the right and left side portions 28R of the rim portion 28. As shown in FIG. The left water conduit 38c is arranged on the back side of the other left side portion 28L of the left and right side portions of the rim portion 28 .

As shown in FIG. 1, wash water supplied from a water supply pipe 102, which is a part of the wash water supply device, flows into the inflow path 38a. 1 and 2 show a supply route Ra of cleaning water from the water supply pipe 102 to the inflow passage 38a. Washing water flows into the inflow passage 38a through an introduction hole 38e formed in a rear wall portion 38d arranged behind the rim portion 28 and partitioning the inflow passage 38a. In this embodiment, the cleaning water supply device supplies cleaning water by a tap water direct pressure type water supply system using the water supply pressure of tap water. As shown in FIG. 3, the inflow path 38a is formed so as to widen in the left-right direction from the front of the introduction hole 38e, which is the inflow position Pa of the cleansing water from the cleansing water supply device. One end of the inflow passage 38a in the left-right direction communicates with the right water passage 38b, and the other end in the left-right direction communicates with the left water passage 38c.

The right water passage 38b is formed on the back side of the right side portion 28R of the rim portion 28 so as to extend along the front-rear direction. A first water outlet 32A is formed at the downstream end of the right water conduit 38b.

The left water passage 38c has a folded portion 38ca formed at the downstream end of the left water passage 38c, and a front-rear extension portion 38cb formed to communicate with the folded portion 38ca and extend along the front-rear direction. included. A second water outlet 32B is formed at the downstream end of the folded portion 38ca, which is the downstream end of the left water conduit 38c. A branching portion 38cc is formed in the front-rear extending portion 38cb of the left water passage 38c so as to extend radially inward in the swirling flow swirling direction Da from an intermediate position in the front-rear direction. A third spout 32C is formed at the downstream end of the branch portion 38cc, which is located in the middle of the left water passage 38c. An inner bottom surface 38cd in a range from the middle position of the front-rear extending portion 38cb to the branch portion 38cc is formed so as to rise as it approaches the third spout 32C.

In the right water passage 38b, the wash water supplied from the inflow passage 38a is guided to flow to the first water outlet 32A (see direction Db). In the front-rear extending portion 38cb of the left water passage 38c, part of the wash water supplied from the inflow passage 38a flows toward the folded portion 38ca (see direction Dc), and the remainder is guided toward the branch portion 38cc. flow (see direction Dd). In the folded portion 38ca, the wash water supplied from the upstream front-rear extending portion 38cb is folded radially inward and flows so as to be guided to the second water outlet 32B (see direction De).

Next, a method for cleaning the toilet bowl portion 14 using the above flush toilet 10 will be described.
The flush toilet 10 cleans the inside of the toilet bowl 14 by a so-called wash-off type cleaning method in which the waste in the toilet bowl 14 is flushed into the trap 18 using the water drop. By operating an operation member such as a switch or lever for starting the supply of flush water, flush water is supplied from the flush water supply device to the water passage portion 38 of the flush toilet 10 within a predetermined flow rate range. Hereinafter, the operation from the start to the end of supply of cleansing water within a predetermined flow rate range will be described as one cleansing operation.

Washing water flows into the inflow passage 38a of the water passage portion 38, and flows through the right side water passage 38b and the left side water passage 38c, and is discharged from the water outlets 32A to 32C. When the inside of the water passage portion 38 is filled with cleansing water, the cleansing water supply device applies a water pressure corresponding to the water pressure to the cleansing water in the water communicating portion 38, and the cleansing water to which the water pressure is applied is discharged to each of the water outlets 32A. Exhaled from ~32C.

FIG. 5 is a diagram showing how flush water flows in the toilet bowl 14. As shown in FIG. This figure shows an initial stage (first stage) in which flush water begins to flow into the toilet bowl portion 14 . In this figure, the flow of flush water in the toilet bowl 14 is indicated by an arrow.
In the initial stage, cleansing water is discharged from the first water outlet 32A and the third water outlet 32C into the toilet bowl 14, and no cleansing water is discharged from the second water outlet 32B. The wash water discharged from the first water outlet 32A forms a swirling flow Dwa along the first rim water conduit 34A. Also, the wash water discharged from the third water outlet 32C forms a swirling flow Dwb along the third rim conduit 34C. The wash water flowing along the rim waterways 34A and 34C gradually flows down from the ledges 34a of the rim waterways 34A and 34C to the receiving surface 26, forming a swirling flow Dwc toward the lower side of the receiving surface 26. .

In this manner, in order to adjust the timing of starting the discharge of cleansing water from each of the water discharge ports 32A to 32C, the water discharger 36 is arranged to extend from the inflow position Pa of the cleansing water in the water passage portion 38 to each of the water discharges 32A to 32C. The length of the water passage is set so as to satisfy a predetermined condition. Specifically, the lengths of the water passages from the inflow position Pa of the cleansing water in the water passage portion 38 to the first water outlet 32A, the second water outlet 32B, and the third water outlet 32C are represented by lengths La1, La2, and La2. Let it be La3. At this time, the length La2 of the water flow path of the second water outlet 32B is set to be longer than the lengths La1 and La3 of the water flow paths of the first water outlet 32A and the third water outlet 32C.

In this embodiment, the timing at which the first water outlet 32A and the third water outlet 32C start discharging cleansing water is the same timing. The term “equivalent” as used herein includes both the case where both objects to be compared are the same and the case where they are substantially the same. Here, it means that both the case where the timing of starting the discharge of cleansing water is the same and the case where the timing is almost the same are included. The interpretation of "equivalent" is the same below.

6 and 7 are other diagrams showing how flush water flows in the toilet bowl 14. FIG. This figure shows an intermediate stage (second stage) after a lapse of time from the initial stage. 6 shows a cross-sectional view of the flush toilet 10 taken along the line A--A as in FIG. 3, and FIG. 7 shows a side partial cross-sectional view of the flush toilet 10. As shown in FIG. First, description will be made with reference to FIG.
In the intermediate stage, washing water is discharged from the second water outlet 32B into the toilet bowl 14 in addition to the first water outlet 32A and the third water outlet 32C. The flow of cleansing water discharged from the first water outlet 32A and the third water outlet 32C is the same as in the initial stage.

The wash water discharged from the second water outlet 32B forms a swirling flow Dwd along the second rim water conduit 34B. The wash water flowing along the second rim water channel 34B gradually falls from the ledge 34a of the second rim water channel 34B to the receiving surface portion 26 and forms a swirling flow Dwe toward the lower side of the receiving surface portion 26. Flows Dwa, Dwb, Dwc, Dwd, and Dwe are formed as swirling flows swirling in the toilet bowl portion 14 in the swirling direction Da by the flush water discharged from the water outlets 32A to 32C. Among them, the flows Dwc and Dwe swirl toward the lower side of the receiving surface portion 26 of the toilet bowl 14 and flow into the concave portion 30 from above the receiving surface portion 26 .

The flow Dwc includes a flow Dwc(1) formed by a part of the cleansing water discharged from the second water outlet 32B and a part of the cleansing water discharged from the third water outlet 32C joining together. The flow Dwc( 1 ) is mainly formed on the receiving surface portion 26 behind the recess 30 . The flow Dwc also includes a flow Dwc(2) formed by a part of the cleansing water discharged from the third water outlet 32C and a part of the cleansing water discharged from the first water outlet 32A joining together. be The flow Dwc(2) is mainly formed on the receiving surface portion 26 of the second divided region Sr2, which is the upstream divided region of the two front divided regions Sr2 and Sr3.

Here, part of the cleansing water discharged from the second water outlet 32B joins with part of the cleansing water discharged from the first water outlet 32A to form a main stream Fw that flows toward the inlet 16 of the trap section 18. The main flow Fw mainly flows from the third divided region Sr3, which is the downstream divided region of the two front divided regions Sr2 and Sr3, to the swirling flow adjacent to the third divided region Sr3 in the swirling direction Da. It is formed on the receiving surface portion 26 in the range over the four divided regions Sr4. More specifically, when viewed from the recessed portion 30 of the toilet bowl portion 14, the main flow Fw is located on the side (left side) of the two front side divided regions Sr2 and Sr3 on which the third divided region Sr is located and on the front side. It is formed on the receiving surface portion 26 of Sr3 and the fourth divided region Sr4 (see range Sa).

The main flow Fw becomes a water flow with a strong water force and a large flow rate due to the confluence of the cleansing water discharged from the first water outlet 32A and the second water outlet 32B. As shown in FIGS. 6 and 7, the main flow Fw flows from above the receiving surface portion 26 toward the entrance 16 of the trap portion 18 via the inside of the recess 30 . More specifically, the main flow Fw flows from the third divided region Sr3 toward the fourth divided region Sr4 on the receiving surface portion 26, that is, from the front side to the rear side on the receiving surface portion 26, and then flows into the concave portion 30. On the other hand, it flows into the recess 30 obliquely from the front side (left side and front side). At this time, the filth in the concave portion 30 of the toilet bowl 14 is swept into the trap portion 18 through the inlet 16 by using the drop of the wash water flowing as the swirling flow, particularly the drop of the wash water flowing as the main stream Fw. . The “drop of the wash water flowing as the main stream Fw” here means the height difference from the confluence position of the wash water discharged from the first water outlet 32A and the second water outlet 32B to the inlet 16 of the trap section 18. Hd (see FIG. 7).

In the recessed portion 30, the main flow Fw flows into the recessed portion 30, and in addition to the flow toward the inlet 16 of the trap portion 18, it also flows forward after colliding with the right side wall portion 30a (first side wall portion) of the recessed portion 30. A flowing flow Dwf is formed. The flow Dwf flows along the right side wall portion 30a of the recess 30 and then collides with the left side wall portion 30b. This flow Dwf tries to flow while being pushed up by the momentum when it collides with the right side wall portion 30a and the left side wall portion 30b of the concave portion 30 . This rising flow Dwf merges with the flow Dwc(2) flowing into the recess 30 from the front side to the rear side on the receiving surface portion 26 (see area Sb), and flows toward the inlet 16 of the trap portion 18. Form Dwg. Like the flow Dwc(2), the flow Dwg also flows from the front side to the rear side in the toilet bowl portion 14 .

The effects of the above flush toilet bowl 10 will be described.
(1) According to the flush toilet 10 described above, the individual spouts 32A to 32C are formed in each of the three divided regions among the four divided regions Sr1 to Sr4. Therefore, rather than forming separate water discharge ports in two of the four divided regions Sr1 to Sr4, the rims from each of the water discharge ports 32A to 32C to the other water discharge ports adjacent to each other in the swirling flow swirling direction Da The inner peripheral length of the portion 28 can be shortened. Consider a case where water discharge ports are individually formed in two divided areas. The wash water flowing along the inner peripheral surface of the rim portion 28 flows downward due to gravity. Therefore, in this case, the length of the inner circumference of the rim portion 28 from one water outlet to another water outlet is increased, making it difficult for a sufficient amount of cleansing water to reach a position away from the water outlet. In this respect, according to the present embodiment, since the inner peripheral length of the rim portion 28 from the spout to the other spout can be shortened in the entire rim portion 28, the washing water can reach the entire inner peripheral surface of the rim portion 28. It will be easier and you will be able to get a good rim cleaning ability.

(2) Further, the main stream Fw directed to the inlet 16 of the trap portion 18 is formed by the confluence of the cleansing water discharged from the first water outlet 32A and the cleansing water discharged from the second water outlet 32B. Since the second water outlet 32B is located in the third divided area Sr3 on the front side, the path through which the washing water flows from the second water outlet 32B to the inlet 16 of the trap section 18 is larger than that provided in the divided area on the rear side. can be shortened. As a result, the water force of the main flow Fw formed by the flush water discharged from the second water outlet 32B becomes stronger, and the strong main flow Fw pushes the filth in the toilet bowl portion 14 to the inlet 16 of the trap portion 18. Good dirt discharge performance can be obtained.

In addition, the main stream Fw directed to the inlet 16 of the trap portion 18 is the wash water discharged from the first water outlet 32A and the wash water discharged from the second water outlet 32B on the receiving surface portion 26, that is, on the toilet bowl portion 14. They are formed by merging on the inner peripheral surface. Therefore, the receiving surface portion 26 can be washed by the strong water flow Fw, and good toilet bowl washing performance can be obtained.

In addition, in order to obtain good rim cleaning performance, filth discharge performance, and toilet bowl cleaning performance, it is necessary to increase the total amount of flush water used for flushing the toilet once, and to increase the flush water discharge rate by increasing the opening area of the spout. A method of increasing is also conceivable. In this respect, according to the present embodiment, it is not necessary to increase the total amount of flushing water used for flushing the toilet bowl once. cleaning performance can be obtained. Moreover, since it is not necessary to increase the opening area of the water spout, it is possible to obtain good rim washing performance, waste discharge performance, and toilet bowl washing performance while preventing an increase in the opening area of the water spout. In particular, since it is possible to prevent an increase in the opening area of the spout, by reducing the size of the spout, it is possible to obtain good rim cleaning performance, waste discharge performance, and toilet bowl cleaning performance while obtaining a good appearance. .

In addition, in order for the washing water to reach the entire inner peripheral surface of the rim portion 28, the longer the inner peripheral length of the rim portion 28 from one water outlet to the other water outlet, the more the amount of washing water discharged from one water outlet. In addition, it is necessary to increase the dimension of the rim conduit 34 connected to one spout. In this regard, according to the present embodiment, the inner peripheral length of the rim portion 28 from one spout to the other spout can be shortened compared to the case where the rim portion 28 is formed with two spouts. Therefore, in order to allow the washing water to reach the entire inner peripheral surface of the rim portion 28, the amount of washing water discharged from the three water discharge ports 32A to 32C can be reduced. Dimensions such as the height of the standing wall portion 34b can be reduced.

Moreover, since the water discharger 36 is configured so that cleansing water is discharged from the second water discharge port 32B after the cleansing water is discharged from the first water discharge port 32A and the third water discharge port 32C, there are the following advantages. If the ratio of the mainstream flow rate, which is the flow rate of the mainstream Fw, to the total amount of washing water used for one washing operation can be increased, the mainstream flow rate can be increased without increasing the total amount of washing water, and the increase in the mainstream flow rate will improve the dirt discharge capacity. , the toilet bowl cleaning ability can be enhanced. According to this embodiment, the amount of cleansing water discharged from the second water outlet 32B and flowing into the inlet 16 without merging can be reduced, so the ratio of the main flow rate to the total amount of cleansing water can be increased. Therefore, the sewage discharge capacity and the toilet bowl washing capacity can be enhanced by increasing the ratio of the mainstream flow rate without increasing the total amount of washing water.

Next, other features of the first water outlet 32A to the third water outlet 32C will be described.
The water discharge portion 36 is configured so that the first water discharge port 32A discharges the largest amount of washing water, the second water discharge port 32B discharges the second largest amount of washing water, and the third water discharge port 32C discharges the smallest amount of washing water. Configured. In other words, the amount of cleansing water discharged decreases in the order of the first water outlet 32A, the second water outlet 32B, and the third water outlet 32C. From another point of view, the first water outlet 32A is configured to discharge more cleansing water than the other two, the second water outlet 32B and the third water outlet 32C. Here, the washing water discharge rate refers to the flow rate (L/s) of washing water passing through the spout per unit time.

In order to satisfy such magnitude relation of the cleaning water discharge amount of each of the water discharge ports 32A to 32C, the water discharge section 36 is configured as follows. A water flow path in the water flow section 38 from the inflow position Pa (see FIG. 3) of the cleansing water from the cleansing water supply device to each of the water outlets 32A to 32C is examined. It is assumed that there is a water flow path corresponding to each of the first water outlet 32A to the third water outlet 32C. The amount of cleansing water discharged from the spout is proportional to the passage cross-sectional area of the portion with the smallest passage cross-sectional area (hereinafter referred to as a flow rate setting portion) in the water passage that supplies cleansing water to the spout. In the present embodiment, the flow rate setting portion of the first water outlet 32A is the first water outlet 32A itself at the downstream end of the water flow path of the first water outlet 32A. The flow rate setting part of the second water outlet 32B is also the second water outlet 32B itself, and the flow rate setting part of the third water outlet 32C is also the third water outlet 32C itself.

The water discharge portion 36 is configured such that the first water discharge port 32A has the largest opening area, which is the passage cross-sectional area, the second water discharge port 32B has the next largest opening area, and the third water discharge port 32C has the smallest opening area. That is, the opening area is configured to decrease in the order of the first water outlet 32A, the second water outlet 32B, and the third water outlet 32C. From another point of view, the opening area of the first water outlet 32A is larger than that of the second water outlet 32B and the third water outlet 32C. Here, the opening area (passage cross-sectional area) refers to the cross-sectional area of a cross section perpendicular to the direction of water flow. As a result, the magnitude relationship of the cleaning water discharge amount of each of the water discharge ports 32A to 32C is configured to be the same as the magnitude relationship of the opening area of each of the water discharge ports 32A to 32C.

FIG. 8 is a diagram showing the inner peripheral lengths Lb1 to Lb3 of the respective rim water conduits 34A to 34C of the rim portion 28. As shown in FIG.
The inner peripheral length here means that, in a horizontal cross section passing through the rim portion 28, from each of the spouts 32A to 32C at the start position of each of the rim conduits 34A to 34C to the terminal position 34Aa of each of the rim conduits 34A to 34C. Refers to the length of the inner peripheral surface in the range up to 34Ca. For example, the inner peripheral length Lb1 of the first rim water conduit 34A is the length of the inner peripheral surface in the range from the first water outlet 32A to the terminal position 34Aa of the first rim water conduit 34A.

In the rim portion 28, the first rim water conduit 34A has the longest inner circumference Lb1, the second rim water conduit 34B has the second longest inner circumference Lb2, and the third rim water conduit 34C has the shortest inner circumference Lb3. formed to be In other words, the inner circumference length Lb1, the inner circumference length Lb2, and the inner circumference length Lb3 are formed to be shorter in this order. A ratio of these inner circumference lengths Lb1, Lb2, and Lb3 is, for example, Lb1:Lb2:Lb3=5:3:2.

In the water discharge section 36, the magnitude relationship of the washing water discharge amount of each of the three water discharge ports 32A to 32C is determined within the first rim conduit 34A to third rim conduit 34C connected to each of the three water discharge ports 32A to 32C. It is configured to have the same size relationship as the circumferential lengths Lb1 to L3. For example, the first water discharge port 32A connected to the first rim water conduit 34A having the longest inner peripheral length Lb1 discharges the largest amount of cleansing water. Also, the third water discharge port 32C connected to the third rim water conduit 34C having the shortest inner peripheral length Lb3 has the smallest discharge amount of cleansing water.

More specifically, the water discharge section 36 has a first rim water conduit 34A to a third rim water conduit 34A to a third rim water conduit connected to each of the three water discharge ports 32A to 32C, so that the ratio of the wash water discharge amount of each of the three water discharge ports 32A to 32C is It is constructed so as to satisfy the relationship equal to the ratio of the inner circumference lengths Lb1 to Lb3 of 34C. For example, when the ratio of the inner peripheral lengths Lb1 to Lb3 is 5:3:2, the ratio of the washing water discharge amounts of the three water discharge ports 32A to 32C is set to satisfy the relationship equivalent to 5:3:2. configured to The water discharge unit 36 is configured so that the ratio of the washing water discharge amounts of the three water discharge ports 32A to 32C is equal to the ratio of the opening areas of the three water discharge ports 32A to 32C. be done.

According to the above-described characteristics, the first water outlet 32A discharges more cleansing water than the second water outlet 32B and the third water outlet 32C. It becomes easy to form the main flow Fw inside. Therefore, by adjusting the positions of the water outlets 32A to 32C, the discharge direction of the cleansing water, etc., the flow of the main flow Fw in the toilet bowl section 14 can be set variously, and the degree of freedom of the cleaning mode with the cleansing water. can be enhanced.

In addition, the magnitude relationship of the washing water discharge amounts of the three water discharge ports 32A to 32C is the same as the magnitude relation of the inner peripheral lengths of the first rim water conduit 34A to the third rim water conduit 34C connected to the three water discharge ports 32A to 32C. configured to be Therefore, a large amount of washing water can flow through the first rim water conduit 34A having a long inner peripheral length, and a sufficient amount of washing water can easily reach the entire first rim water conduit 34A. Further, the amount of washing water used in the third rim water conduit 34C can be suppressed by flowing a small amount of washing water in the third rim water conduit 34C having a short inner peripheral length. For this reason, a sufficient amount of washing water can be distributed over the entire inner peripheral surface of the rim portion 28 to obtain a good rim washing performance, while the amount of washing water used for washing the entire inner peripheral surface of the rim portion 28 can be reduced. It can be suppressed easily.

In addition, the first water outlet 32A, which discharges a larger amount of cleansing water than the other two water outlets 32B and 32C, is provided in the first divided area on the rear side, providing the following advantages. The right side water passage 38b that supplies cleansing water to the first water outlet 32A has a passage cross-sectional area larger than that of the left side water passage 38c in order to increase the amount of cleansing water discharged from the first water outlet 32A compared to the other water outlets 32B and 32C. must be ensured. According to this embodiment, since the first water discharge port 32A, which discharges a large amount of cleansing water, is provided in the divided region on the rear side, the first water discharge port 32A is provided in the divided region on the front side. The longitudinal dimension of the water channel 38b can be suppressed, and the water discharger 36 can be easily miniaturized. Therefore, it is possible to easily reduce the size of the entire water discharger 36 while obtaining good rim cleaning performance, waste discharge performance, and toilet bowl cleaning performance.

In the water discharger 36, the total amount of washing water discharged from the first water outlet 32A and the second water outlet 32B (hereinafter also referred to as the total discharge amount) is greater than the amount of washing water discharged from the third water outlet 32C. configured as As a result, it can be expected that more than half of the total amount of washing water used in one washing operation is used to form the main stream Fw. Therefore, the flow rate of the strong water force Fw can be increased, and by washing the receiving surface portion 26 of the toilet bowl portion 14 with the strong water force and large flow rate Fw, a better toilet bowl washing performance can be obtained. In addition, by sweeping the filth in the toilet bowl portion 14 to the inlet 16 of the trap portion 18 with the strong water force and large flow rate Fw, a particularly good filth discharge performance can be obtained. From the viewpoint of obtaining such effects, the water discharger 36 has a ratio of the total discharge amount of the first water discharge port 32A and the second water discharge port 32B to 60% to 80% of the total amount of washing water used in one washing operation. It is preferable to be configured as follows. The total amount of washing water here is synonymous with the total amount of washing water discharged from each of the first water outlet 32A to the third water outlet 32C.

Further, it is preferable that the water discharger 36 is configured so that the ratio of the amount of washing water discharged from the first water discharge port 32A to the total amount of washing water used in one washing operation is 40% to 60%.

Further features of the first to third water outlets 32A to 32C will be described.
The first water outlet 32A to the third water outlet 32C are, as shown in FIG. It is individually formed in each of the divided region Sr3 and the two rear first divided regions Sr1 and fourth divided region. In other words, the first water outlet 32A to the third water outlet 32C are located in the second divided area Sr2 on the upstream side in the swirl direction Da of the two front side second divided areas Sr2 and third divided areas Sr3. is not formed.

Explain this advantage. FIG. 9(a) is a diagram showing a toilet body 12 according to a first modified example. In this example, the second water outlet 32B is formed in the second divided region Sr2.
When the user takes a toilet seated on the toilet seat of the flush toilet 10, small water received by the receiving surface 26 of the toilet bowl 14 may splash around (see direction Df). At this time, when a small amount of splashed water hits the inner peripheral surface area including the left-right center position 28a on the front side of the rim portion 28, the small amount of water is transmitted to the inner peripheral surface area along the circumferential direction, thereby forming the second water outlet. There is a possibility of entering from 32B into the right water passage 38b.

In this respect, according to this embodiment, as shown in FIG. Small water traveling along the circumferential direction is less likely to enter from the second water outlet 32B to the far side of the left water conduit 38c. Therefore, it is possible to suppress the possibility that urine components remain behind the second water discharge port 32B (inside the water passage portion 38 of the water discharge portion 36), thereby preventing stains and odors from occurring. Therefore, it is possible to obtain good cleanliness while obtaining good rim washing ability.

According to the above configuration, there are also the following advantages. FIG. 10 is a diagram showing a toilet body 12 according to a first modification of FIG. 9(a).
A centrifugal force Fc directed radially outward is applied to the flush water flowing along the inner peripheral surface of the toilet bowl portion 14 . This centrifugal force Fc increases as the radius of curvature of the portion where the cleansing water flows becomes smaller.

Consider a case where the second water outlet 32B is provided in the second divided region Sr2. In this case, the cleansing water discharged from the water discharge port 32 flows through the inner peripheral surface region at the front side of the rim portion 28 at the lateral center position Pa. Since the toilet bowl 14 is formed in an elliptical shape in which the front-rear dimension is larger than the left-right dimension, the inner peripheral surface area at the left-right center position Pa usually tends to have a smaller radius of curvature than other locations. Therefore, when the second water outlet is provided in the second divided area Sr2, the force of the cleansing water discharged from the second water outlet 32B tends to weaken due to the centrifugal force Fc.

In this respect, according to the present embodiment, the second water outlet 32B is arranged in the third divided region Sr3, so that the cleansing water discharged from the second water outlet 32B is directed to the lateral center position of the rim portion 28 having a small radius of curvature. It becomes possible to flow toward the inlet 16 of the trap portion 18 without passing through the inner peripheral surface area at Pa. Therefore, the main flow Fw formed by the wash water discharged from the second water outlet 32B is less likely to weaken due to the centrifugal force Fc, and the toilet bowl is more favorable than when the second water outlet 32B is arranged in the second divided region Sr2. You will be able to gain cleaning ability and dirt discharge ability.

Other features of the flush toilet 10 will be described.
Please refer to FIG. A left water conduit 38c that supplies cleansing water to the second water outlet 32B is formed on the back side of the left side portion 28L so as to extend along the front-rear direction. The left water passage 38c is formed on the back side of the left side portion 28L of the left side portion 28L and the right side portion 28R of the rim portion 28 on the side where the third divided region Sr3 in which the second water outlet 32B is formed. be done. The left water passage 38c is formed on the back side of the left side portion 28L so as to straddle the front-rear center line Lb in plan view. From another point of view, the left water passage 38c is not formed on the back side of the right side portion 28R of the rim portion 28 so as to straddle the front-rear center line Lb. Explain this advantage.

According to the above-described configuration, the left water passage 38c can be arranged in such a layout that it does not pass through the back side of the left-right center position Pb on the front side of the rim portion 28 . Therefore, compared to arranging the water passage through the rear side of the lateral center position Pb of the rim portion 28, the water passage from the inflow position Pa of the cleansing water can be shortened, and the water flow from the second water outlet 32B can be shortened. It becomes possible to spit out strong washing water. As a result, even better rim cleaning performance, toilet bowl cleaning performance, and dirt discharge performance can be obtained. This effect is obtained more effectively as the position of the second spout 32B is closer to the rear side of the third divided region Sr3 of the toilet bowl portion 14 .

In addition, if the water passages are arranged so as to pass through the back side of the left-right center position Pb on the front side of the rim portion 28, the water passages for the first water discharge port 32A and the water passages for the second water discharge port 32B are arranged on the rim portion 28 must be arranged side by side in the left-right direction on the back side of the right side portion 28R. In this regard, according to the above-described configuration, the right water conduit 38b for the first water outlet 32A and the left water conduit 38c for the second water outlet 32B are arranged side by side on the back side of the right side portion 28R of the rim portion 28. It will be fine without placing it. Therefore, the width dimension of the back side portion of the right side portion 28R of the rim portion 28 can be reduced. Thereby, as shown in FIGS. 1 and 2, the width dimension of the side portion 12b of the upper surface portion 12a of the toilet body 12, which extends laterally from the upper edge of the toilet bowl portion 14, can be reduced.

A straight section 34Bb is formed on the inner peripheral surface of the second rim water conduit 34B to extend linearly at a position away from the second water outlet 32B in the swirling flow swirling direction Da. A curvature reduction section 34Bc is formed on the inner peripheral surface of the second rim water conduit 34B such that the curvature decreases with distance from the second water outlet 32B in a continuous range from the second water outlet 32B to the straight section 34Bb. is formed. A straight section 34Cb is also formed on the inner peripheral surface of the third rim water conduit 34C to extend linearly at a position away from the third water outlet 32C in the swirling flow swirling direction Da. A curvature reduction section 34Cc is also formed on the inner peripheral surface of the third rim water conduit 34C such that the curvature decreases as the distance from the third water outlet 32C increases in a continuous range from the third water outlet 32C to the straight section 34Cb. is formed.

In this manner, curvature reduction sections 34Bc and 34Cb are formed continuously from the water outlets 32B and 32C on the inner peripheral surfaces of the rim water conduits 34B and 34C. Therefore, in the range from when it is discharged from each of the water outlets 32B and 32C to when it passes through the straight sections 34Bb and 34Ca, the strong wash water immediately after being discharged from each of the water outlets 32B and 32C flows through the section with a large radius of curvature. Therefore, it becomes difficult to apply a large centrifugal force to the washing water flowing in that range. Therefore, the water flow discharged from the water outlets 32B, 32C and directed to the inlet 16 of the trap part 18 is less likely to weaken from the strong state immediately after being discharged from the water outlets 32B, 32C. As a result, the filth can be pushed in by the stronger water flow, and a better filth discharge performance can be obtained.

FIG. 11(a) is a diagram showing the structure around the second water outlet 32B according to the embodiment.
The second water outlet 32B includes an inner standing wall portion 34b (hereinafter also referred to as an inner standing wall portion 34b(1)) and an outer standing wall portion 34b (hereinafter referred to as an outer standing wall portion 34b(2)) adjacent in the radial direction of the toilet bowl portion 14. It is partially formed by Of the two standing wall portions 34b, the circumferential end portion 34ba of the outer standing wall portion 34b(2) and the circumferential end portion 34bb of the inner standing wall portion 34b(1) extend from the center point Cp of the toilet bowl portion 14. They are arranged so as to line up on the line Lc. Here, "aligned" includes the case where the two standing wall portions 34b are aligned so that the angular range in which the two vertical wall portions 34b overlap in the circumferential direction is 3° or less when viewed from the center point Cp of the toilet bowl portion 14. It can also be said that the two vertical wall portions 34b are arranged so that the angular range of overlapping in the circumferential direction is 3° or less when viewed from the center point Cp of the toilet bowl portion 14 . Explain this advantage.

FIG. 11(b) is a diagram showing the structure around the second water outlet 32B according to the second modification. If, as shown in FIG. 11(b), the circumferential ends 34ba and 34bb of the two standing wall portions 34b do not line up on the imaginary line Lc, the angular range in which the two standing wall portions 34b overlap in the circumferential direction increases. Consider the case. In this case, separate water channel portions 40 are formed so as to be connected to the upstream end and the downstream end of the folded portion 38ca, respectively, side by side in the radial direction. Here, the two inner wall surfaces 38f that face each other in the radial direction at the folded portion 38ca are directed toward the abutting position 38g of the folded portion 38ca because the rim conduit 34A is formed radially inward with respect to the folded portion 38ca. It becomes easy to form so that it may become narrow as it progresses. Therefore, the width dimension of each channel portion 40 is also easily formed so as to become narrower as it approaches the folded portion 38ca. For this reason, in the route Rb from the front-rear extending portion 38cb of the left water passage 38c to the second water outlet 32B via the folded portion 38ca, the portion having a passage cross-sectional area smaller than that of the second water outlet 32B is the inner standing wall portion. 34b are likely to be formed on both sides in the radial direction (see range Sc). As a result, it becomes difficult to design the second water outlet 32B to be the part with the smallest passage cross-sectional area in the water flow path leading to the second water outlet 38B, that is, the above-described flow rate setting portion.

On the other hand, as described above, if the circumferential ends 34ba and 34bb of the two standing wall portions 34b are formed so as to line up on the imaginary line Lc, the upstream end and the downstream end of the folded portion 38ca are connected to the respective separate ends. It becomes difficult to form the water channel portions 40 of the above side by side in the radial direction. This makes it difficult to form a portion of the path Rb having a passage cross-sectional area smaller than that of the second water outlet 32B, thereby facilitating design so that the second water outlet 32B serves as a flow rate setting portion.

In addition, since the second water outlet 32B is formed in the divided area Sr3 on the front side of the toilet bowl 14, it is located at a position that is difficult for the user to visually recognize during normal use. Therefore, the circumferential ends 34ba and 34bb of the two vertical wall portions 34b forming the second water outlet 32B are arranged side by side, and in some cases, the structure is such that the back side can be seen from the second water outlet 32B. Even if there is, it is possible to prevent deterioration of the design by making the second spout 32B itself difficult to see. Here, "during normal use" refers to a situation in which a person approaches the flush toilet 10 from the front and then sits on the toilet seat to defecate.

FIG. 12 is a diagram showing the structure around the third spout 32C.
W1 is the width dimension of the left water conduit 38c at the position where the left water conduit 38c and the front-rear center line Lb overlap in plan view. A width change region 38h is formed in the left water passage 38c so that the width dimension gradually increases toward the rear from the front-rear center line Lb. In this width change region 38h, when a position 38i having a width dimension W2 that is twice the width dimension W1 is defined as a reference position 38i, the third spout 32C is formed behind this reference position 38i. If the third water outlet 32C is formed in a position (for example, range Sd) ahead of the reference position 38i, it is necessary to secure a wall portion around it for guiding the cleansing water to the third water outlet 32C. , the water passage from the periphery thereof to the second water outlet 32B tends to become narrower. On the other hand, if the third water outlet 32C is formed behind the reference position 38i, the water passage leading to the second water outlet 32B is less likely to be narrowed by the wall portion for guiding the cleansing water to the third water outlet 32C. , it becomes easier to supply a sufficient amount of washing water to the second water outlet 32B.

Although the present invention has been described above based on the embodiments, the embodiments merely show the principles and applications of the present invention. In addition, many modifications and changes in arrangement are possible in the embodiments without departing from the spirit of the present invention defined in the claims.

Although the flush toilet bowl 10 uses the wash-off method as a cleaning method, the inside of the toilet bowl 14 may be cleaned by a cleaning method combined with other methods such as a siphon method and a siphon jet method. Although the flush toilet 10 has been described as an example using a water supply direct pressure system as a water supply system, other water supply systems such as a gravity water supply system using gravity and a flush valve system may be used. Although the toilet body 12 has been described as a wall-mounted toilet, it may be a floor-standing toilet installed on the floor of the toilet room. Further, the toilet body 12 may be made of resin or the like other than ceramics.

Further, the ledge portion 34a of the rim water conduit 34 is arranged so that the gradient of the upper surface portion connecting to the upper edge 26a of the receiving surface portion 26 is gentler than the gradient of the inner surface portion of the receiving surface portion 26 connecting to the upper edge 26a of the receiving surface portion 26. It is sufficient if it is formed. As long as such conditions are satisfied, the upper surface portion of the shelf portion 34a may be formed in a planar shape as shown in FIG. 1 and the like, or may be formed in an arc shape. Further, the rim water conduit 34 is formed such that the shape of the vertical cross section perpendicular to the swirling direction D of the swirling flow is a continuous curved surface formed by the upper surface portion of the shelf portion 34a of the rim water conduit 34 and the lower surface portion of the overhang portion 34c. may be Also, the rim water conduit 34 may not have the overhang portion 34c. Also, the three rim water conduits 34A to 34C have been described as being separated from the other rim water conduits at the terminal positions 34Aa, 34Ba, and 34Ca without being continuous with the other rim water conduits. may be formed so as to be continuous with

Moreover, from the viewpoint of obtaining the above-mentioned effect (1), the three water outlets 32A to 32C may be individually formed in each of the three divided regions among the four divided regions Sr1 to Sr4. From this point of view, the positions of the three spouts 32A to 32C are not limited to the content of the embodiment.

FIG. 13 is a schematic diagram showing an example of an arrangement pattern of the spouts 32A to 32C that can provide the effect (1).
From the viewpoint of obtaining the effect (1), for example, as shown in FIG. A third spout 32C may be formed in the region Sr4. Further, as shown in FIG. 13B, a first water outlet 32A is formed in the first divided area Sr1, a second water outlet 32B is formed in the second divided area Sr2, and a third water outlet 32C is formed in the third divided area Sr3. may Further, as shown in FIG. 13C, the first water outlet 32A is formed in the second divided region Sr2, the second water outlet 32B is formed in the third divided region Sr3, and the third water discharge port 32C is formed in the fourth divided region Sr4. may In this manner, the first water outlet 32A, which discharges the largest amount of cleansing water, may be formed in the front divided area instead of the rear divided area. In any case, it can be said that one of the four divided regions Sr1 to Sr4 is not formed with a water outlet, and the other three divided regions are individually formed with a water outlet.

Moreover, the three water discharge ports 32A to 32C need only be formed so that at least one of the three divided regions of the four divided regions Sr1 to Sr4 is included in each of the three divided regions, and straddles the adjacent divided regions. It may be formed as For example, while forming the second water outlet 32B in the third divided area Sr3 and the third water outlet 32C in the fourth divided area Sr4, the first water outlet 32A straddles the first divided area Sr1 and the second divided area Sr2. It may be formed as In addition, the second water outlet 32B may be formed so as to straddle the adjacent divided areas, and the third water outlet 32C may be formed so as to straddle the adjacent divided areas. good. In addition, from the viewpoint of obtaining the above-mentioned effect (1), the three water outlets 32A to 32C are arranged so that they are separated from each other by an angular range of 1/4 or more circumference when viewed from the center point Cp of the toilet bowl portion 14. may be Also, the cleaning water discharge amount and the opening area of the three water discharge ports 32A to 32C are not limited to the contents of the embodiment. For example, the three water outlets 32A to 32C may have the same discharge amount of cleansing water, or only two of the three water outlets 32A to 32C may have the same discharge amount of cleansing water.

Also, from the viewpoint of obtaining the above-mentioned effect (2), it is not essential to form the three water outlets 32A to 32C, and at least two water outlets may be formed. Here, it is assumed that the toilet bowl portion 14 has two divided regions divided by the front-rear center line Lb. In the example of FIG. 3, the two segmented regions here are composed of the first segmented region Sr1 and the fourth segmented region Sr4, and the other is the second segmented region Sr2 and the third segmented region. Sr3. In this case, the two water discharge ports are a first water discharge port 32A formed in one of the two divided regions Sr1 to Sr4 and a second water discharge port 32B formed in the front divided region. and should be included. In this case, the second water outlet 32B may be formed in the same divided area as the divided area in which the first water outlet 32A is formed, or may be formed in another divided area. The positions of these two spouts 32A and 32B are not limited to the content of the embodiment.

FIG. 14 is a schematic diagram showing an example of an arrangement pattern of the spouts 32A and 32B that can obtain the effect (2).
From the viewpoint of obtaining the effect (2), for example, as shown in FIG. good too. Further, as shown in FIG. 14B, the first water outlet 32A may be formed in the second divided area Sr2, and the second water outlet 32B may be formed in the third divided area Sr3. In addition, as shown in FIG. 14(c), a third water outlet 32C may be further formed in the fourth divided region Sr4.

Also, an example has been described in which the water discharge ports 32A to 32C of the rim portion 28 of the toilet bowl portion 14 are arranged so as to overlap each other in the vertical direction. In addition to this, each of the water outlets 32A to 32C of the rim portion 28 is such that any one or all of the water outlets 32A to 32C do not overlap in the vertical direction, They may be arranged at positions shifted in the vertical direction. In this case, the front-rear center line Lb of the toilet bowl 14 bisects the front-rear dimension of the inner surface portion of the toilet bowl 14 in the plan view of the horizontal cross section passing through the lowermost spout and extends along the left-right direction. It is defined by an extending straight line.

In addition, as described above, the water discharge section 36 merges the wash water discharged from the first water discharge port 32A and the wash water discharged from the second water discharge port 32B to divert the main flow Fw toward the inlet 16 of the drainage passage. configured to form. The water discharger 36 can be configured to form such a main stream Fw by adjusting at least one of the positions of the water discharge ports 32A and 32B, the amount of cleansing water discharged, and the direction of cleansing water discharge.

Also, an example has been described in which the timings of starting to discharge cleansing water from the first water outlet 32A and the third water outlet 32C (hereinafter referred to as discharge start timings) are the same. The discharge start timing may be earlier than the washing water discharge start timing of the second water outlet 32B, and the discharge start timing may be shifted between the first water outlet 32A and the third water outlet 32C.

Further, an example has been described in which the water discharge unit 36 adjusts the passage cross-sectional area of the water flow path corresponding to each of the water discharge ports 32A to 32C in order to adjust the washing water discharge amount of each of the water discharge ports 32A to 32C. In addition to this, the washing water discharge amount may be adjusted by a throttle valve or the like provided in the middle of the water flow path to each of the water discharge ports 32A to 32C. Also, a valve mechanism such as an electrically driven valve may be used to adjust the timing of starting to discharge cleansing water from each of the water discharge ports 32A to 32C.

DESCRIPTION OF SYMBOLS 10... Flush toilet bowl 12... Toilet bowl body 14... Toilet bowl part 16... Entrance 20... Drain passage part 26... Receiving surface part 28... Rim part 28L... Left side part 28R... Right side part 32A ... first water outlet, 32B... second water outlet, 32C... third water outlet, 36... water outlet, 38b... right side water passage (first water passage) 38c... left side water passage (second water passage), Sr1~ Sr4... Division area, La... Left-right center line, Lb... Front-back center line.

Claims (7)

A toilet bowl body having a toilet bowl portion, a drainage passage portion communicating with the toilet bowl portion through an inlet formed in the bottom portion of the toilet bowl portion, and a water discharge portion for discharging flush water into the toilet bowl portion. ,
The toilet bowl has a receiving surface for receiving waste and a rim connected to the upper edge of the receiving surface,
the water discharge portion has two water discharge ports formed in the rim portion, and discharges cleansing water from the two water discharge ports into the toilet bowl portion to one side in the circumferential direction;
The toilet bowl portion is divided by a lateral center line that bisects the lateral dimension of the outer surface portion of the toilet body and a longitudinal center line that bisects the longitudinal dimension of the inner surface portion of the toilet bowl portion in plan view. has four sub-regions that are
Among the four divided regions, the two water discharge ports include a first water discharge port formed in one of the divided regions on the left and right sides, and a second water discharge port formed on the other divided region on the left and right sides and on the front side. included,
The water discharge part has a water passage part of a hollow structure that is arranged on the back side of the rim part and supplies cleansing water to the two water discharge ports,
The water passage portion is disposed on the back side of the left and right one side portion of the rim portion, and includes a first water passage for supplying cleansing water to the first water discharge port and the other left and right side of the rim portion. a second water passage disposed on the back side of the side portion so as to pass through the front-rear center line and supplying wash water to the second water outlet;
The water discharge part is configured to join the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port to form a main flow toward the inlet,
The flush toilet, wherein the water discharge part is configured to discharge cleansing water from the second water discharge port after cleansing water is discharged from the first water discharge port. 2. The flush toilet bowl according to claim 1, wherein the second water passage is formed with a folded portion that folds flush water supplied from the upstream side and guides it to the second water outlet. 3. The flush toilet according to claim 1, wherein the water discharge part has a third water discharge port formed in the rim part in a rear divided area of the four divided areas. The first water outlet, the second water outlet, and the third water outlet are arranged in order on one side in the circumferential direction,
The water discharge unit is configured such that a total amount of washing water discharged from the first water outlet and from the second water outlet is greater than a discharge amount of washing water from the third water outlet. Item 3. The flush toilet bowl according to item 3. 5. The water discharge part is configured to discharge cleansing water from the second water outlet after cleansing water is discharged from the first water outlet and the third water outlet. The flush toilet described in . The flush toilet according to any one of claims 1 to 5, wherein the second spout is formed in one of the two front divided areas in the circumferential direction. . In the water discharge portion, the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port join on the inner peripheral surface of the toilet bowl portion to form a main flow toward the inlet. The flush toilet bowl according to any one of claims 1 to 6, characterized in that it is configured to

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