JP2019210806A - Flush toilet bowl - Google Patents

Abstract

To provide a flush toilet bowl capable of obtaining excellent dirt discharge capacity.SOLUTION: A flush toilet bowl has a toilet bowl body 12, which has a toilet bowl part 14, a water discharge passage in communication with the toilet bowl part 14 through an inlet 16 formed at a bottom part of the toilet bowl part 14, and a water discharge part that discharges washing water into the toilet bowl part 14. The water discharge part discharges water in one circumferential direction into the toilet bowl part 14 from two water discharge ports 32A, 32B. The toilet bowl part 14 has two separate areas divided by a longitudinal center line Lb in plan view. Two water discharge ports 32A, 32B include a first water discharge port 32A, which is formed in either one of two separate areas, and a second water discharge port 32B, which is formed in a separate area on front side. The water discharge part forms a main flow Fw flowing toward the inlet 16 by combining washing water discharged from the first water discharge port 32A and washing water discharged from the second water discharge port 32B.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a flush toilet.

  Conventionally, various studies have been made on a cleaning method for cleaning the toilet bowl of a toilet. In Patent Document 1, a first flushing port is provided in the rear side of the toilet bowl part and the left and right one side region, and a second flushing port is provided in the rear side of the toilet bowl part and the left and right side region. A toilet bowl has been proposed. In this flush toilet, the wash water discharged from each water outlet flows into the recess of the toilet bowl, and the accumulated water in the recess is stirred in the vertical direction. It is described that such agitation of the stored water in the recesses makes it possible to sink and discharge the filth in the recesses easily, and improve the filth discharge performance.

Japanese Patent No. 5553188

  As a result of studying the structure of Patent Document 1, the present inventor has recognized the following problems. In the flush toilet of Patent Document 1, the path through which the wash water flows from each water outlet to the entrance of the drain pipe has a long structure. Therefore, the wash water discharged from the water discharge port reaches the recessed portion in a state where the water force is relatively weakened. For this reason, there is a room for improvement in terms of filth discharge performance because the water flow for draining filth into the drainage pipe tends to be insufficient.

  This invention is made | formed in view of such a subject, The objective is to provide the flush toilet which can obtain favorable waste discharge | emission capability.

In order to solve the above problems, a flush toilet according to an aspect of the present invention includes a toilet bowl, a drainage passage that communicates with the toilet bowl through an inlet formed at the bottom of the toilet bowl, A toilet body having a water discharge portion for discharging wash water, and a toilet bowl portion has a receiving surface portion for receiving filth, and a rim portion connected to the upper edge portion of the receiving surface portion, The water discharge portion has two water discharge ports formed in the rim portion, and the wash water is discharged from one of the two water discharge ports into one side of the circumferential direction into the toilet bowl portion. The front and rear dimensions of the inner surface portion of the two parts are divided by a front and rear center line, and the two spouts are formed in one of the two divided areas. 1 spout and a second spout formed in the front divided region are included, and the spout section discharges from the first spout. And wash water out, configured to merge a wash water discharged from the second water outlet to form a main flow toward the entrance.
According to this aspect, the main flow toward the inlet of the drainage passage portion is formed by joining the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port. Since the second water discharge port is in the front divided region, the path through which the wash water flows from the second water discharge port to the inlet of the drainage passage can be made shorter than that provided in the rear divided region. As a result, the mainstream water formed by the wash water discharged from the second outlet becomes stronger, and the sewage in the toilet bowl is pushed to the entrance of the drainage passage by the mainstream of strong water, so that good filth discharge performance is achieved. It will be obtained.

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

In the above-described aspect, the first water outlet, the second water outlet, and the third water outlet are sequentially arranged in one of the circumferential directions, and the water discharge portion has a total amount of washing water discharged from the first water outlet and the second water outlet. Further, it may be configured to be larger than the washing water discharge amount of the third water discharge port.
According to this aspect, it can be expected that the amount of cleaning water more than half of the total amount of cleaning water used in one cleaning operation is used for forming the mainstream. Therefore, the flow rate of the main stream of strong water can be increased, and particularly good waste discharge performance can be obtained by pushing the filth in the toilet bowl to the entrance of the drainage passage by the main stream of strong water and large flow rate.

In the above-described aspect, the water discharger may be configured such that the wash water is discharged from the second water discharge port after the wash water is discharged from the first water discharge port and the third water discharge port.
Increasing the ratio of the main flow rate to the total amount of cleaning water used for a single cleaning operation can increase the waste discharge capacity without increasing the total amount of cleaning water. According to this aspect, since the amount of cleaning water discharged from the second water outlet and flowing into the inlet without joining can be reduced, the ratio of the main flow rate to the total amount of cleaning water can be increased. Therefore, the waste discharge performance can be enhanced by increasing the ratio of the main flow rate.

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

In the above-described aspect, the water discharge portion forms a main flow that flows from the first water discharge port and the wash water discharged from the second water discharge port together on the inner peripheral surface of the toilet bowl portion and heads toward the entrance. It may be configured to.
According to this aspect, the inner peripheral surface of the toilet bowl portion can be cleaned by the mainstream of strong water, and good toilet bowl cleaning performance can be obtained.

In the above-described aspect, the toilet bowl portion has four divided regions that are divided by a left-right center line that bisects the left-right dimension of the outer surface portion of the toilet body in plan view, and a front-rear center line. The water discharge port is formed in a divided region on one side in the circumferential direction of the two front divided regions, the water discharge unit has a water flow path for supplying cleaning water to the second water discharge port, Of the lateral portions on both the left and right sides of the rim portion, the rim portion may be formed so as to extend along the front-rear direction on the back side of the side portion on the side where there is a divided region on one circumferential side.
According to this aspect, the water passage can be arranged in such a layout as not to pass through the back side of the center position of the right and left of the front part of the rim part. Therefore, the water flow path for supplying the wash water to the second water outlet can be shortened rather than arranging the water flow path so as to pass through the back side of the center position in the left-right direction of the front part of the rim part. A strong washing water can be discharged from the water outlet. As a result, it becomes possible to obtain a better waste discharge capability.

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

It is side surface sectional drawing of the flush toilet bowl which concerns on embodiment. It is a top view of the flush toilet concerning an embodiment. It is the sectional view on the AA line of FIG. It is a figure for demonstrating the left-right 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 initial stage in the toilet bowl part which concerns on embodiment. It is a figure which shows how the wash water flows in the middle stage in the toilet bowl part which concerns on embodiment. It is another figure which shows the flow of the wash water in the middle stage in the toilet bowl part which concerns on embodiment. It is a figure which shows the internal peripheral length of the 1st rim water channel of a rim | limb part-a 3rd rim water channel. It is a figure which shows how small water is transmitted, Fig.9 (a) is a figure which shows the toilet bowl main body which concerns on a 1st modification, 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 provided to washing water. Fig.11 (a) is a figure which shows the structure around the 2nd water outlet which concerns on embodiment, and FIG.11 (b) is a figure which shows the structure around the 2nd water outlet which concerns on a 2nd modification. It is a figure showing the structure around the 3rd spout. It is a schematic diagram which shows the example of the arrangement pattern of the spout from which an effect (1) is obtained. It is a schematic diagram which shows the example of the arrangement pattern of the water outlet which can obtain an effect (2).

  Hereinafter, in the embodiment and the modification, the same reference numerals are given to the same components, and the duplicate description is omitted. Moreover, in each drawing, a part of component is abbreviate | omitted suitably for convenience of explanation.

FIG. 1 is a side sectional view of a flush toilet 10 according to the present embodiment, and FIG. 2 is a plan view of the flush toilet 10.
The flush toilet 10 includes a toilet body 12 made of ceramic. The toilet body 12 is a wall-mounted toilet that is attached in a state of being hung on the side wall surface 100 of the toilet room. Although not shown, a box containing a hot water cleaning device such as a local cleaning device, a toilet lid and a toilet seat that are rotatably supported by the box are disposed above the toilet body 12.

  As shown in FIG. 1, the toilet bowl body 12 has a toilet bowl portion through a toilet bowl portion 14 formed at the front portion of the toilet bowl body 12 and an entrance 16 (see also FIG. 2) formed at the bottom of the toilet bowl portion 14. 14 and a trap portion 18 communicating with the inside. The trap part 18 becomes a part of the drainage passage part 20 for discharging the filth in the toilet bowl part 14 to the sewer side water channel (not shown). In addition to the trap portion 18, the drainage passage portion 20 includes a connecting pipe 22 connected to the downstream end portion of the trap portion 18, and filth is discharged into the sewage side water channel through the inside thereof. The trap portion 18 stores a sealed water 24 that blocks the flow of air in the direction of water flow, and the backflow of odors from the sewage side water channel is prevented by the sealed water 24.

FIG. 3 is a sectional view taken along line AA in FIG.
As shown in FIGS. 1 and 3, the toilet bowl portion 14 is formed in an elliptical shape whose front and rear dimensions are larger than the left and right dimensions in plan view. The toilet bowl portion 14 includes a receiving surface portion 26 for receiving filth, a rim portion 28 that is connected to the upper edge portion of the receiving surface portion 26 and forms the upper edge portion of the toilet bowl portion 14, and a lower edge of the receiving surface portion 26. And a recess 30 formed to be recessed downward from the portion.

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

  Three water outlets 32 </ b> A to 32 </ b> C (described later) are formed in the rim portion 28. The rim portion 28 has three rim conduits 34A to 34C formed so as to extend in the circumferential direction of the toilet bowl portion 14 from each of the three water discharge ports 32A to 32C. Hereinafter, the water discharge ports 32A to 32C are collectively referred to as “water discharge port 32”, and the rim water conduits 34A to 34C are collectively referred to as “rim water conduit 34”.

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

  The three rim water conduits 34 include a first rim water conduit 34A to a third rim water conduit 34C corresponding to each of the three first water outlets 32A to 32C. The first rim water conduit 34A is formed so as to extend in the swirl flow turning direction Da from the first water outlet 32A to the terminal position 34Aa in the vicinity of the second water outlet 32B and the inner side thereof as the terminal position 34Aa in plan view. Is done. The second rim conduit 34B is formed so as to extend in the swirl flow turning direction Da from the second water outlet 32B to the terminal position 34Ba, with the vicinity of the third water outlet 32C and the inside thereof as the terminal position 34Ba. The third rim conduit 34C is formed so as to extend from the third water outlet 32C to the terminal position 34Ca with the vicinity of the first water outlet 32A and the inside thereof as the terminal position 34Ca. Each of the rim conduits 34A to 34C is formed so as to extend over an angle range corresponding to at least ¼ of the angular range around the center point Cp (described later) of the toilet bowl portion 14.

FIG. 4 is a view 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 left-right center line La of the toilet main body 12 refers to a straight line extending in the front-rear direction by equally dividing the left-right dimension Lx of the outer surface portion of the toilet main body 12 in a plan view. Specifically, a straight line that bisects the left-right 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 left-right center line La. Moreover, the front-rear center line Lb of the toilet bowl part 14 bisects the front-rear dimension Ly of the inner surface part of the toilet bowl part 14 in a plan view of a horizontal section passing through the water discharge ports 32A to 32C of the toilet bowl part 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 14 is the front-rear center line Lb. In addition, the centerline Cp of the toilet bowl part 14 mentioned above refers to the intersection of the left-right centerline La and the front-rear centerline Lb.

  The toilet bowl 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 14 in plan view. Hereinafter, among the four divided regions, a divided region on the rear side with respect to the front-rear center line Lb and on the right side with respect to the left-right center line La is referred to as a first divided region Sr1. Of the four divided areas, the divided areas in the counterclockwise direction in plan view from the first divided area Sr1 are sequentially designated as a second divided area Sr2, a third divided area Sr3, and a fourth divided area Sr4. The second divided region Sr2 and the third divided region Sr3 are front divided regions, and the first divided region Sr1 and the fourth divided region Sr4 are rear divided regions.

  Returning to FIG. 3, the toilet body 12 further includes a water discharge portion 36 having the three water discharge ports 32 </ b> A to 32 </ b> C described above. The water discharge part 36 has the water flow part 38 mentioned later other than the three water discharge ports 32A-32C. The water discharge part 36 is for discharging washing water from the three water discharge ports 32A to 32C along the inner peripheral surface of the rim part 28 in the swirl flow turning direction Da. The water discharger 36 forms a swirling flow that swirls in the stool bowl 14 in one direction by discharging wash water into the toilet bowl 14 from each of the water discharge ports 32A to 32C. In the present embodiment, a swirl flow swirling around one side Da (counterclockwise direction) in the circumferential direction of the toilet bowl 14 is formed. Hereinafter, one side Da in the circumferential direction is referred to as a swirl flow swirl direction Da.

  The three water discharge ports 32 </ b> A to 32 </ b> C are individually formed in each of the three divided regions among the four divided regions Sr <b> 1 to Sr <b> 4 of the toilet bowl portion 14. Specifically, the three water outlets 32A to 32C include a first water outlet 32A located in the first divided area Sr1, a second water outlet 32B located in the third divided area Sr3, and a position located in the fourth divided area Sr4. And a third water outlet 32C. Any of the water discharge ports 32 </ b> A to 32 </ b> C is formed to open in the swirl flow swirl direction Da.

  The water flow portion 38 is a hollow structure portion disposed on the back side of the rim portion 28 (outside in the radial direction of the toilet bowl portion 14). The water passing portion 38 communicates with each of the water discharge ports 32A to 32C and becomes a passage for the washing water supplied to each of the water discharge ports 32A to 32C. The water passage 38 includes an inflow passage 38a, a right water passage 38b (first water passage), and a left water passage 38c (second water passage). The inflow path 38 a is disposed behind and on the back side of the rim portion 28. The right-side water passage 38b is disposed on the back side of one right side portion 28R among the side portions on both the left and right sides of the rim portion 28. The left water passage 38c is disposed on the back side of the other left side portion 28L among the left and right side portions of the rim portion 28.

  As shown in FIG. 1, the cleaning water supplied from the water supply pipe 102 which is a part of the cleaning water supply device flows into the inflow path 38a. 1 and 2 show a supply path Ra of the cleaning water from the water supply pipe 102 to the inflow path 38a. The cleaning water flows into the inflow path 38a through the introduction hole 38e formed in the rear wall 38d that is disposed behind the rim portion 28 and defines the inflow path 38a. In the present embodiment, the cleaning water supply device supplies cleaning water by a water supply direct pressure type water supply method using the tap water supply pressure. As shown in FIG. 3, the inflow path 38 a is formed so as to expand in the left-right direction from the front of the introduction hole 38 e that becomes the inflow position Pa of the cleaning water from the cleaning water supply device. The right-hand water passage 38b communicates with one end of the inflow passage 38a in the left-right direction, and the left-hand water passage 38c communicates with the other end in the left-right direction.

  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-side water passage 38b.

  The left water passage 38c has a folded portion 38ca formed at the downstream end portion of the left water passage 38c, and a front / rear extending portion 38cb formed so as to communicate with the folded portion 38ca and extend in the front-rear direction. included. A second water discharge port 32B is formed at the downstream end of the folded portion 38ca that is the downstream end of the left water passage 38c. A branch portion 38cc is formed in the front-rear extending portion 38cb of the left water passage 38c so as to extend from the midway position in the front-rear direction to the swirl flow turning direction Da and radially inward. A third water discharge port 32 </ b> C is formed at the downstream end of the branch portion 38 cc, which is the midway position of the left water passage 38 c. The inner bottom surface 38cd in the range from the midway position of the front / rear extending portion 38cb to the branching portion 38cc is formed so as to rise as it approaches the third water discharge port 32C.

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

Next, the washing | cleaning method of the toilet bowl part 14 using the above flush toilet 10 is demonstrated.
The flush toilet 10 wash | cleans the inside of the toilet bowl part 14 with the so-called washing-off type washing | cleaning system which pours the waste in the toilet bowl part 14 in the trap part 18 using the drop of water. By operating the operation members such as a switch and a lever for starting the supply of the cleaning water, the cleaning water within a predetermined flow rate range is supplied from the cleaning water supply device into the water passing portion 38 of the flush toilet 10. Hereinafter, the operation from the start to the end of the supply of cleaning water within a predetermined flow rate range will be described as a single cleaning operation.

  The wash water flows into the inflow passage 38a of the water flow section 38, and the wash water that has flowed in is discharged from the water outlets 32A to 32C while flowing through the right water passage 38b and the left water passage 38c. When the inside of the water flow section 38 is filled with the wash water, a water pressure corresponding to the water supply pressure is applied to the wash water in the water flow section 38 by the wash water supply device, and the wash water to which the water pressure is applied is supplied to each spout 32A. Exhaled from ~ 32C.

FIG. 5 is a view showing how the washing water flows in the toilet bowl 14. This figure shows the initial stage (first stage) at which the wash water begins to flow into the toilet bowl 14. In this figure, the flow of washing water in the toilet bowl 14 is shown with an arrow.
In the initial stage, the wash water is discharged from each of the first water discharge port 32A and the third water discharge port 32C, and the wash water is not discharged from the second water discharge port 32B. The wash water discharged from the first water discharge port 32A forms a flow Dwa that swirls along the first rim conduit 34A. Further, the wash water discharged from the third water discharge port 32C forms a flow Dwb that swirls along the third rim conduit 34C. The wash water flowing along the rim water guide channels 34A and 34C gradually flows down from the shelves 34a of the rim water guide channels 34A and 34C to the receiving surface portion 26, and forms a flow Dwc that swirls toward the lower side of the receiving surface portion 26. .

  Thus, in order to adjust the timing at which the discharge of the wash water from each of the water discharge ports 32A to 32C is started, the water discharge unit 36 extends from the wash water inflow position Pa in the water flow unit 38 to each of the water discharge ports 32A to 32C. The length of the water passage is set so as to satisfy a predetermined condition. Specifically, the length of the water flow path from the inflow position Pa of the wash water in the water flow section 38 to each of the first water discharge port 32A, the second water discharge port 32B, and the third water discharge port 32C is represented by lengths La1, La2, Let it be La3. At this time, the length La2 of the water flow path of the second water discharge port 32B is set to be longer than the lengths La1 and La3 of the water flow paths of the first water discharge port 32A and the third water discharge port 32C.

  In addition, in this embodiment, the timing which starts discharge of the wash water of 32A of 1st spouts and the 3rd spout 32C becomes an equivalent timing. Here, “equivalent” includes both the case where the comparison targets 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 the washing water is the same and the case where the timing is almost the same are included. The interpretation of “equivalent” is the same in the following.

6 and 7 are other views showing how the washing water flows in the toilet bowl 14. In this figure, an intermediate stage (second stage) after a lapse of time from the initial stage is shown. 6 shows a cross-sectional view taken along line AA of the flush toilet 10 as in FIG. 3, and FIG. 7 shows a side partial cross-sectional view of the flush toilet 10. First, a description will be given with reference to FIG.
In the middle stage, wash water is discharged into the toilet bowl 14 from the second water discharge port 32B in addition to the first water discharge port 32A and the third water discharge port 32C. The flow of the cleaning 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 discharge port 32B forms a flow Dwd that swirls along the second rim conduit 34B. The wash water flowing along the second rim conduit 34B gradually falls from the shelves 34a of the second rim conduit 34B to the receiving surface portion 26, and forms a flow Dwe that turns while facing the lower portion of the receiving surface portion 26. Flows Dwa, Dwb, Dwc, Dwd, Dwe are formed as a swirl flow swirling in the swirl flow swirl direction Da by the wash water discharged from the water discharge ports 32A to 32C. Among these, the flows Dwc and Dwe turn while going downward from the receiving surface portion 26 of the toilet bowl portion 14, and flow into the recess 30 from the receiving surface portion 26.

  The flow Dwc includes a flow Dwc (1) formed by joining a part of the washing water discharged from the second water discharge port 32B and a part of the washing water discharged from the third water discharge port 32C. The flow Dwc (1) is mainly formed on the receiving surface portion 26 behind the concave portion 30. Further, the flow Dwc includes a flow Dwc (2) formed by joining a part of the washing water discharged from the third water discharge port 32C and a part of the washing water discharged from the first water discharge port 32A. It is. 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, a part of the wash water discharged from the second water discharge port 32 </ b> B merges with a part of the wash water discharged from the first water discharge port 32 </ b> A to form the main flow Fw toward the inlet 16 of the trap portion 18. The main flow Fw is mainly adjacent to the third divided region Sr3 in the swirl flow swirl direction Da from the third divided region Sr3, which is the downstream divided region of the two front divided regions Sr2, Sr3. It is formed on the receiving surface portion 26 in a range extending to the four divided regions Sr4. More specifically, the mainstream Fw is the third divided region on the side (left side) and the front side of the third divided region Sr of the two front divided regions Sr2 and Sr3 when viewed from the recess 30 of the toilet bowl portion 14. 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 flow and a large flow rate by combining the wash water discharged from each of the first water discharge port 32A and the second water discharge port 32B. As shown in FIGS. 6 and 7, the main flow Fw flows from the receiving surface portion 26 toward the inlet 16 of the trap portion 18 through the recess 30. More specifically, the main flow Fw flows from the third divided region Sr3 to 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 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 recess 30 of the toilet bowl portion 14 is swept into the trap portion 18 through the inlet 16 using the above-described drop of the wash water flowing as the swirl flow, in particular, the drop of the wash water flowing as the main flow Fw. . Here, “the head of the cleaning water flowing as the main flow Fw” is the difference in height from the confluence position of the cleaning water discharged from each of the first water outlet 32A and the second water outlet 32B to the inlet 16 of the trap portion 18. Hd (see FIG. 7).

  In the recess 30, the main flow Fw flows into the recess 30, so that it flows forward after colliding with the right side wall 30 a (first side wall) of the recess 30 in addition to the flow toward the inlet 16 of the trap portion 18. A heading flow Dwf is formed. This flow Dwf flows so as to collide with the left wall 30b after flowing along the right wall 30a of the recess 30. The flow Dwf tends to flow while being lifted up by the momentum when it collides with the right side wall 30a and the left side wall 30b of the recess 30. This increased flow Dwf merges with the flow Dwc (2) flowing into the recess 30 from the front side toward the rear side on the receiving surface portion 26 (see range Sb), and thereby flows toward the inlet 16 of the trap portion 18. Dwg is formed. Similarly to the flow Dwc (2), the flow Dwg also flows from the front side in the toilet bowl 14 toward the rear side.

The effect of the flush toilet 10 will be described.
(1) According to the flush toilet 10 described above, individual spouts 32A to 32C are formed in each of the three divided areas among the four divided areas Sr1 to Sr4. Therefore, rather than forming individual water discharge ports in two divided regions of the four divided regions Sr1 to Sr4, rims from the respective water discharge ports 32A to 32C to other water discharge ports adjacent to the swirl flow swirl direction Da. The inner peripheral length of the part 28 can be shortened. Let us consider a case in which water outlets are individually formed in two divided regions. The washing water that flows along the inner peripheral surface of the rim portion 28 flows downward due to gravity. Therefore, in this case, since the inner peripheral length of the rim portion 28 from the water outlet to another water outlet becomes longer, it becomes difficult for a sufficient amount of washing water to reach a position away from the water outlet. In this respect, according to this embodiment, since the inner peripheral length of the rim portion 28 from the water outlet to another water outlet can be shortened in the entire rim portion 28, the cleaning water can reach the entire inner peripheral surface of the rim portion 28. It becomes easy to obtain a good rim cleaning ability.

(2) Further, the main flow Fw toward the inlet 16 of the trap portion 18 is formed by joining the cleaning water discharged from the first water discharge port 32A and the cleaning water discharged from the second water discharge port 32B. Since the second water discharge port 32B is in the front third divided region Sr3, the path through which the wash water flows from the second water discharge port 32B to the inlet 16 of the trap portion 18 rather than being provided in the rear divided region. Can be shortened. As a result, the water flow of the main flow Fw formed by the wash water discharged from the second water discharge port 32B becomes stronger, and the sewage in the toilet bowl portion 14 is pushed to the inlet 16 of the trap portion 18 by the main flow Fw of the strong water flow. Good filth discharge performance can be obtained.

  In addition, the main flow Fw toward the inlet 16 of the trap portion 18 is such that the wash water discharged from the first water discharge port 32A and the wash water discharged from the second water discharge port 32B are on the receiving surface portion 26, that is, the toilet bowl portion 14. It is formed by merging on the inner peripheral surface. Therefore, the receiving surface part 26 can be washed by the main stream Fw of strong water, 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, increase the total amount of cleaning water used for one toilet cleaning or increase the opening area of the spout to increase the amount of cleaning water discharge. A method to increase it is also conceivable. In this respect, according to the present embodiment, since it is not necessary to increase the total amount of washing water used for one toilet cleaning, it is possible to prevent the increase in the total amount of washing water, while having good rim washing ability, waste discharge performance, toilet bowl Cleaning performance can be obtained. In addition, since it is not necessary to increase the opening area of the water outlet, it is possible to obtain good rim cleaning performance, filth discharge performance, and toilet bowl cleaning performance while preventing an increase in the opening area of the water outlet. In particular, since it is possible to prevent an increase in the opening area of the water discharge port, by reducing the size of the water discharge port, it is possible to obtain a good rim cleaning performance, waste discharge performance, and toilet bowl cleaning performance while obtaining a good appearance. .

  Further, in order to allow the cleaning water to reach the entire inner peripheral surface of the rim portion 28, as the inner peripheral length of the rim portion 28 from one water outlet to the other water outlet becomes longer, the amount of cleaning water discharged from one water outlet becomes larger. In addition, it is necessary to increase the size of the rim conduit 34 connected to one water outlet. In this respect, according to the present embodiment, the inner peripheral length of the rim portion 28 from one water outlet to another water outlet can be shortened as compared with the case where two water outlets are formed in the rim portion 28. Therefore, in order to allow the cleaning water to reach the entire inner peripheral surface of the rim portion 28, the amount of cleaning water discharged from the three water discharge ports 32A to 32C can be reduced, and the width of the shelf 34a of the rim conduit 34 can be reduced. Dimensions such as the height of the standing wall 34b can be reduced.

  Moreover, since the water discharge part 36 is comprised so that wash water may be discharged from the 2nd water discharge port 32B after the wash water is discharged from the 1st water discharge port 32A and the 3rd water discharge port 32C, it has the following advantages. Increasing the ratio of the main flow rate, which is the flow rate of the main flow Fw to the total wash water amount used for a single cleaning operation, can increase the main flow rate without increasing the total wash water amount. The toilet bowl cleaning ability can be increased. According to the present embodiment, since the amount of cleaning water discharged from the second water discharge port 32B and flowing into the inlet 16 without joining can be reduced, the ratio of the main flow rate to the total amount of cleaning water can be increased. Therefore, the waste discharge capacity and the toilet bowl cleaning capacity can be enhanced by increasing the ratio of the main flow rate without increasing the total amount of cleaning water.

Next, other features regarding the first water outlet 32A to the third water outlet 32C will be described.
The water discharger 36 has the largest amount of water discharged from the first water outlet 32A, the second largest amount of water discharged from the second water outlet 32B, and the smallest amount of water discharged from the third water outlet 32C. Composed. That is, the cleaning water discharge amount is configured to decrease in the order of the first water discharge port 32A, the second water discharge port 32B, and the third water discharge port 32C. From another viewpoint, the first water discharge port 32A is configured to have a larger discharge amount of the cleaning water than the other two second water discharge ports 32B and 32C. The washing water discharge amount here refers to the flow rate (L / s) of washing water per unit time passing through the water outlet.

  In order to satisfy such a magnitude relation of the amount of cleaning water discharged from each of the water discharge ports 32A to 32C, the water discharge unit 36 is configured as follows. The water flow path in the water flow part 38 from inflow position Pa (refer FIG. 3) of the wash water from a wash water supply apparatus to each water discharge port 32A-32C is examined. It is assumed that there are water passages corresponding to each of the first water outlet 32A to the third water outlet 32C. The amount of washing water discharged from the water outlet is proportional to the passage cross-sectional area of a portion (hereinafter referred to as a flow rate setting unit) having the smallest passage cross-sectional area in the water flow path for supplying cleaning water to the water outlet. In the present embodiment, the flow rate setting unit 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 unit of the second water discharge port 32B is also the second water discharge port 32B itself, and the flow rate setting unit of the third water discharge port 32C is also the third water discharge port 32C itself.

  The water discharger 36 is configured such that the opening area that is the passage cross-sectional area of the first water discharge port 32A is the largest, the opening area of the second water discharge port 32B is the next largest, and the third water discharge port 32C is the smallest. That is, it is configured such that the opening area decreases in the order of the first water outlet 32A, the second water outlet 32B, and the third water outlet 32C. From another viewpoint, the first water outlet 32A is configured to have a larger opening area than the second water outlet 32B and the third water outlet 32C. Here, the opening area (passage cross-sectional area) refers to a cross-sectional area in a cross section orthogonal to the water flow direction. Thereby, the magnitude relation of each washing water discharge amount of each water outlet 32A-32C is comprised so that it may become the same as the magnitude relation of each opening area of each water outlet 32A-32C.

FIG. 8 is a diagram illustrating the inner peripheral lengths Lb1 to Lb3 of the rim conduits 34A to 34C of the rim portion 28.
Here, the inner circumferential length refers to the end positions 34Aa to 34Aa to 34C of the rim conduits 34A to 34C from the water discharge ports 32A to 32C at the start positions of the rim conduits 34A to 34C in the horizontal section passing through the rim portion 28. The length of the inner peripheral surface in the range up to 34Ca. For example, the inner peripheral length Lb1 of the first rim 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 conduit 34A.

  In the rim portion 28, the inner peripheral length Lb1 of the first rim conduit 34A is the longest, the inner periphery Lb2 of the second rim conduit 34B is the second longest, and the inner periphery Lb3 of the third rim conduit 34C is the shortest. Formed to be. That is, the inner circumferential length Lb1, the inner circumferential length Lb2, and the inner circumferential length Lb3 are formed so as to be shorter in this order. The ratio of these inner peripheral lengths Lb1, Lb2, and Lb3 is, for example, Lb1: Lb2: Lb3 = 5: 3: 2.

  The water discharge portion 36 has a relationship in magnitude of the amount of washing water discharged from each of the three water discharge ports 32A to 32C, the first rim water conduit 34A to the third rim water conduit 34C connected to each of the three water discharge ports 32A to 32C. It is comprised so that it may become the same as the magnitude relationship of circumference Lb1-L3. For example, the first water discharge port 32A connected to the first rim conduit 34A having the longest inner circumferential length Lb1 has the largest washing water discharge amount. Further, the third water discharge port 32C connected to the third rim conduit 34C having the shortest inner circumferential length Lb3 has the smallest amount of discharge of the cleaning water.

  More specifically, in the water discharger 36, the ratio of the wash water discharge amounts of the three water discharge ports 32 </ b> A to 32 </ b> C is connected to each of the three water discharge ports 32 </ b> A to 32 </ b> C. It is configured so as to satisfy the relationship equivalent to the ratio of the inner circumferential lengths Lb1 to Lb3 of 34C. For example, when the ratio of the inner circumferential lengths Lb1 to Lb3 is 5: 3: 2, the ratio of the cleaning water discharge amounts of the three water discharge ports 32A to 32C satisfies the relationship equivalent to 5: 3: 2. Configured. In addition, the water discharge part 36 is comprised so that ratio of each washing water discharge amount of three water discharge ports 32A-32C may satisfy | fill the relationship which becomes equivalent to ratio of each opening area of three water discharge ports 32A-32C. Is done.

  According to the above-described feature, the first water outlet 32A has a larger amount of washing water discharge than the other second water outlet 32B and the third water outlet 32C. Therefore, the toilet bowl portion 14 is washed by the water discharged from the first water outlet 32A. It becomes easy to form the mainstream Fw inside. For this reason, by adjusting the positions of the water discharge ports 32A to 32C, the discharge direction of the wash water, etc., it is possible to set various ways of flowing the main flow Fw in the toilet bowl 14, and the degree of freedom of the wash mode by the wash water Can be enhanced.

  Moreover, the magnitude relationship of the wash water discharge amount of the three water discharge ports 32A to 32C is the same as the size relationship of the inner peripheral lengths of the first rim water guide passage 34A to the third rim water guide passage 34C connected to the three water discharge ports 32A to 32C. Configured to be. Therefore, a large amount of cleaning water can be flowed through the first rim conduit 34A having a long inner peripheral length, and a sufficient amount of cleaning water can be easily distributed throughout the first rim conduit 34A. In addition, the amount of cleaning water used in the third rim conduit 34C can be suppressed by flowing a small amount of cleaning water in the third rim conduit 34C having a short inner peripheral length. For this reason, a sufficient amount of cleaning water is distributed over the entire inner peripheral surface of the rim portion 28 to obtain a good rim cleaning capability, and the amount of cleaning water used for cleaning the entire inner peripheral surface of the rim portion 28 is reduced. Easy to suppress.

  Moreover, since the 1st water discharge port 32A with larger washing water discharge amount than the other two water discharge ports 32B and 32C is provided in a 1st division | segmentation area of a rear side, there exists the following advantages. The right-side water passage 38b that supplies cleaning water to the first water outlet 32A has a larger passage cross-sectional area than the left-side water passage 38c in order to increase the amount of washing water discharged from the first water outlet 32A over the other water outlets 32B and 32C. It is necessary to ensure. According to the present embodiment, since the first water discharge port 32A having a large cleaning water discharge amount is provided in the rear divided region, the right side passage having a larger passage cross-sectional area than the first water discharge port 32A is provided in the front divided region. The front and rear dimensions of the water channel 38b can be suppressed, and the water discharge portion 36 can be easily downsized. Therefore, it is possible to easily reduce the size of the water discharger 36 as a whole while obtaining good rim cleaning ability, waste discharging ability, and toilet bowl cleaning ability.

  In addition, in the water discharger 36, the total amount of cleaning water discharged from the first water outlet 32A and the second water outlet 32B (hereinafter also referred to as the total discharge amount) is larger than the amount of cleaning water discharged from the third water outlet 32C. Configured as follows. Thereby, it can be expected that the amount of cleaning water more than half of the total amount of cleaning water used in one cleaning operation is used for forming the main flow Fw. Therefore, it is possible to increase the flow rate of the strong water main flow Fw, and to wash the receiving surface portion 26 of the toilet bowl portion 14 with the strong water flow and the large flow main flow Fw, it is possible to obtain a better toilet bowl cleaning ability. Further, by pushing the filth in the toilet bowl portion 14 to the inlet 16 of the trap portion 18 by the main stream Fw having a strong water flow and a large flow rate, particularly good filth discharge performance can be obtained. From the viewpoint of obtaining such operational effects, in the water discharger 36, the ratio of the total discharge amount of the first water discharge port 32 </ b> A and the second water discharge port 32 </ b> B to the total amount of water used in one cleaning operation is 60% to 80%. It is preferable to be configured so that Here, the total amount of washing water is synonymous with the total amount of washing water discharged from each of the first water outlet 32A to the third water outlet 32C.

  Moreover, it is preferable that the water discharge part 36 is comprised so that the ratio of the wash water discharge amount of 32 A of 1st water discharge ports with respect to the total wash water amount used by one washing | cleaning operation may be 40%-60%.

Still another feature regarding the first water outlet 32A to the third water outlet 32C will be described.
As shown in FIG. 3, the first water discharge port 32 </ b> A to the third water discharge port 32 </ b> C are the third downstream regions Sr <b> 2 and the third divided region Sr <b> 3 on the downstream side of the swirl flow swirl direction Da. Each of the divided areas Sr3, the two rear first divided areas Sr1, and the fourth divided areas is formed individually. In other words, the first water discharge port 32A to the third water discharge port 32C are in the second divided region Sr2 upstream of the swirl flow swirl direction Da among the two front divided second regions Sr2 and third divided regions Sr3. Is not formed.

This advantage will be described. Fig.9 (a) is the figure which shows the toilet bowl main body 12 which concerns on a 1st modification. In this example, the second water discharge port 32B is formed in the second divided region Sr2.
When the user makes a small use while sitting on the toilet seat of the flush toilet 10, the small water received by the receiving surface portion 26 of the toilet bowl 14 may be scattered around (see direction Df). At this time, when small water splashed on the inner peripheral surface region including the left and right center position 28a on the front side of the rim portion 28 hits the second spout, the small water is transmitted to the inner peripheral surface region along the circumferential direction. There is a possibility of entering from 32B to the right water passage 38b.

  In this respect, according to the present embodiment, as shown in FIG. 9B, when small water hits the inner peripheral surface region including the left and right center position 28a on the front side of the rim portion 28, the inner peripheral surface region Small water transmitted along the circumferential direction does not easily enter from the second water discharge port 32B to the back side in the left water passage 38c. Therefore, the possibility that urine components remain on the back side of the second water discharge port 32B (in the water flow part 38 of the water discharge part 36) can be suppressed, and the occurrence of dirt and odor can be prevented accordingly. Therefore, good cleanliness can be obtained while obtaining good rim cleaning ability.

The above-described configuration also has the following advantages. FIG. 10 is a view showing the toilet body 12 according to the first modification of FIG.
Centrifugal force Fc directed radially outward is applied to the wash water flowing along the inner peripheral surface of the toilet bowl 14. This centrifugal force Fc increases as the radius of curvature of the portion through which the washing water flows decreases, and the greater the centrifugal force, the weaker the water flow flowing toward the inlet 16 of the trap portion 18 becomes.

  Consider a case where the second water discharge port 32B is provided in the second divided region Sr2. In this case, the wash water discharged from the water discharge port 32 flows through the inner peripheral surface region at the left and right center position Pa on the front side of the rim portion 28. In the inner peripheral surface region at the left and right center position Pa, since the toilet bowl portion 14 is formed in an elliptical shape having a front-rear dimension larger than the left-right dimension, the curvature radius is usually likely to be smaller than other positions. Therefore, when the second water discharge port is provided in the second divided region Sr2, the water flow of the cleaning water discharged from the second water discharge port 32B is likely to be weakened by the centrifugal force Fc.

  In this regard, according to the present embodiment, since the second water discharge port 32B is disposed in the third divided region Sr3, the wash water discharged from the second water discharge port 32B is used as the center of the left and right sides of the rim portion 28 having a small curvature radius. It is possible to flow toward the inlet 16 of the trap portion 18 without going through the inner peripheral surface area at Pa. Accordingly, the main flow Fw formed by the wash water discharged from the second water outlet 32B is less likely to weaken the water force due to the centrifugal force Fc, and is a better toilet bowl than the second water outlet 32B disposed in the second divided region Sr2. It is possible to obtain cleaning ability and waste discharge ability.

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

  According to the above-described configuration, the left water passage 38c can be arranged in a layout that does not pass through the rear side of the left and right center position Pb on the front side of the rim portion 28. Therefore, the water flow path from the washing water inflow position Pa can be made shorter than the water flow path arranged so as to pass through the back side of the right and left center position Pb of the rim portion 28, and the water flow from the second water discharge port 32B. The strong washing water can be discharged. As a result, better rim cleaning ability, toilet bowl cleaning ability, and waste discharging ability can be obtained. This effect is obtained more effectively as the position of the second water discharge port 32B approaches the rear side of the third divided region Sr3 of the toilet bowl portion 14.

  Further, if the water passage is arranged so as to pass through the back side of the front left and right center position Pb of the rim portion 28, the water passage for the first water outlet 32A and the water passage for the second water outlet 32B are connected to the rim portion. It is necessary to arrange side by side in the left-right direction behind the right side portion 28R of 28. In this regard, according to the configuration described above, the right-side water passage 38b for the first water outlet 32A and the left-side water passage 38c for the second water outlet 32B are arranged in the left-right direction behind the right-side portion 28R of the rim portion 28. It will be better without placement. 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 FIG. 1, FIG. 2, the width dimension of the side part 12b extended to the side from the upper end edge of the toilet bowl part 14 among the upper surface parts 12a of the toilet bowl main body 12 can be made small.

  On the inner peripheral surface of the second rim conduit 34B, a straight section 34Bb extending linearly is formed at a position away from the second water discharge port 32B in the swirling flow turning direction Da. A curvature decreasing section 34Bc formed on the inner peripheral surface of the second rim conduit 34B so that the curvature decreases as the distance from the second water outlet 32B increases in a continuous range from the second water outlet 32B to the straight section 34Bb. Is formed. Further, a straight section 34Cb that extends linearly at a position away from the third water discharge port 32C in the swirl flow swirl direction Da is also formed on the inner peripheral surface of the third rim conduit 34C. Also on the inner peripheral surface of the third rim conduit 34C, in a continuous range from the third water outlet 32C to the straight section 34Cb, a curvature decreasing section 34Cc formed so that the curvature decreases as the distance from the third water outlet 32C increases. Is formed.

  Thus, curvature decreasing sections 34Bc and 34Cb continuous from the water discharge ports 32B and 32C are formed on the inner peripheral surfaces of the rim conduits 34B and 34C. Therefore, the strong wash water immediately after being discharged from each of the water outlets 32B and 32C flows through the section having a large radius of curvature in the range from the discharge from each of the water outlets 32B and 32C to passing through the straight sections 34Bb and 34Ca. Therefore, it becomes difficult to apply a large centrifugal force to the wash water flowing through the range. For this reason, the water flow toward the inlet 16 of the trap portion 18 after being discharged from the water outlets 32B and 32C is less likely to weaken from the strong water state immediately after being discharged from the water outlets 32B and 32C. As a result, the filth can be pushed in by the strong water flow, and a better filth discharge performance can be obtained.

Fig.11 (a) is a figure which shows the structure around the 2nd water discharge port 32B which concerns on embodiment.
The second water discharge port 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)) that are adjacent in the radial direction of the toilet bowl portion 14. (Also called). 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) are virtual extending from the center point Cp of the toilet bowl portion 14. It arrange | positions so that it may rank with on line Lc. Here, “alignment” includes a case where the angle range in which the two standing wall portions 34 b overlap in the circumferential direction is 3 ° or less when viewed from the center point Cp of the toilet bowl portion 14. It can be said that the two standing wall portions 34b are arranged so that the angle range overlapping in the circumferential direction is 3 ° or less when viewed from the center point Cp of the toilet bowl portion 14. This advantage will be described.

  FIG.11 (b) is a figure which shows the structure around the 2nd water discharge port 32B which concerns on a 2nd modification. As shown in FIG. 11B, the circumferential end portions 34ba and 34bb of the two standing wall portions 34b do not line up on the imaginary line Lc, and the angle range where the two standing wall portions 34b overlap in the circumferential direction becomes large. Think about the case. In this case, separate water channel portions 40 connected to the upstream end and the downstream end of the folded portion 38ca are formed side by side in the radial direction. Here, the two inner wall surfaces 38f opposed in the radial direction at the folded-back portion 38ca are directed to the abutting position 38g of the folded-back portion 38ca because the rim conduit 34A is formed radially inward with respect to the folded-back portion 38ca. It becomes easy to form so that it may become narrow. Therefore, the width dimension of each water channel portion 40 is also easily formed so as to become narrower as it approaches the folded portion 38ca. For this reason, in the path Rb from the front-rear extending portion 38cb of the left water passage 38c to the second water discharge port 32B via the folded portion 38ca, the portion having a smaller passage cross-sectional area than the second water discharge port 32B is the inner vertical wall portion. 34b is easily formed on both sides in the radial direction (see range Sc). As a result, it is difficult to design the portion having the smallest passage cross-sectional area in the water flow path connected to the second water discharge port 38B, that is, the above-described flow rate setting unit as the second water discharge port 32B.

  On the other hand, as described above, if the circumferential end portions 34ba and 34bb of the two standing wall portions 34b are formed so as to be aligned on the imaginary line Lc, the upstream end and the downstream end of the folded portion 38ca are separated. It becomes difficult to form the water channel portions 40 side by side in the radial direction. Thereby, in the above-mentioned route Rb, it is difficult to form a portion having a smaller passage cross-sectional area than the second water discharge port 32B, and it is easy to design the second water discharge port 32B as a flow rate setting unit.

  In addition, since the 2nd spout 32B is formed in the division area Sr3 of the front side of the toilet bowl part 14, it exists in the position where it is hard to be visually recognized by the user at the time of normal use. Therefore, it arrange | positions so that the circumferential direction edge part 34ba and 34bb of the two standing wall part 34b which forms the 2nd water discharge port 32B may be located in a line, and it is a structure which can look into the back side from the 2nd water discharge port 32B depending on the case. Even if it exists, the fall of the designability can be prevented by making it difficult to visually recognize the second water discharge port 32B itself. Here, “during normal use” refers to a situation in which a user sits on a toilet seat and uses a toilet after approaching the flush toilet 10 from the front.

FIG. 12 is a view showing a structure around the third water discharge port 32C.
In a plan view, the width dimension of the left water passage 38c at the position where the left water passage 38c and the front-rear center line Lb overlap is defined as W1. In the left-side water passage 38c, a width change region 38h is formed so that the width dimension gradually increases toward the rear from the front-rear center line Lb. In the width change region 38h, when the position 38i having the width dimension W2 that is twice the width dimension W1 is set as the reference position 38i, the third water discharge port 32C is formed behind the reference position 38i. If the third water discharge port 32C is formed at a position ahead of the reference position 38i (for example, the range Sd), it is necessary to secure a wall portion around the periphery for guiding the wash water to the third water discharge port 32C. The water passage from the periphery to the second water discharge port 32B tends to become narrow. On the other hand, if the third water discharge port 32C is formed behind the reference position 38i, the water passage toward the second water discharge port 32B is not easily narrowed by the wall portion for guiding the wash water to the third water discharge port 32C. It becomes easy to supply a sufficient amount of washing water to the second water discharge port 32B.

  As mentioned above, although this invention was demonstrated based on embodiment, embodiment only shows the principle and application of this invention. In the embodiment, many modifications and arrangements can be made without departing from the spirit of the present invention defined in the claims.

  Although the flush toilet 10 has been described with an example of using the wash-off method as the cleaning method, the inside of the toilet bowl 14 may be cleaned by a cleaning method combined with another method such as a siphon type or a siphon-zette type. Although the flush toilet 10 has been described with respect to an example in which a water supply direct pressure system is used as a water supply system, a water supply system such as a gravity water supply system using gravity or a flash valve system may be used. Although the toilet body 12 has been described by taking a wall-mounted toilet as an example, it may be a floor-standing toilet installed on the floor surface of a toilet room. The toilet body 12 may be made of resin or the like in addition to pottery.

  In addition, the shelf 34 a of the rim conduit 34 is such that the gradient of the upper surface portion connected to the upper edge 26 a of the receiving surface portion 26 is gentler than the gradient of the inner surface portion of the receiving surface portion 26 connected to the upper edge 26 a of the receiving surface portion 26. It only has to be formed. As long as these conditions are satisfied, the upper surface portion of the shelf 34a may be formed in a flat shape as shown in FIG. 1 or the like, or may be formed in an arc shape. Further, the rim conduit 34 has a vertical cross-sectional shape orthogonal to the swirl flow swirl direction D formed into a curved surface that is continuous by the upper surface portion of the shelf portion 34a of the rim conduit 34 and the lower surface portion of the overhang portion 34c. May be. Further, the rim conduit 34 may not have the overhang portion 34c. Moreover, although the three rim water guide paths 34A-34C demonstrated the example formed so that it might be divided | segmented not in continuation with another rim water guide path in terminal position 34Aa, 34Ba, 34Ca, other rim water guide paths And may be formed continuously.

  In addition, from the viewpoint of obtaining the above-described operational effect (1), the three water discharge ports 32A to 32C may be formed individually in each of the three divided regions among the four divided regions Sr1 to Sr4. From this viewpoint, the positions of the three water discharge ports 32A to 32C are not limited to the contents of the embodiment.

FIG. 13 is a schematic diagram illustrating an example of an arrangement pattern of the water discharge ports 32 </ b> A to 32 </ b> C from which the effect (1) can be obtained.
From the viewpoint of obtaining the effect (1), for example, as shown in FIG. 13A, the first water outlet 32A is provided in the first divided region Sr1, the second water outlet 32B is provided in the second divided region Sr2, and the fourth division. The third water discharge port 32C may be formed in the region Sr4. Further, as shown in FIG. 13B, a first water discharge port 32A is formed in the first divided region Sr1, a second water discharge port 32B is formed in the second divided region Sr2, and a third water discharge port 32C is formed in the third divided region Sr3. May be. Further, as shown in FIG. 13C, a first water discharge port 32A is formed in the second divided region Sr2, a second water discharge port 32B is formed in the third divided region Sr3, and a third water discharge port 32C is formed in the fourth divided region Sr4. May be. As described above, the first water discharge port 32A having the largest cleaning water discharge amount may be formed not in the rear divided region but in the front divided region. In any case, it can be said that, out of the four divided regions Sr1 to Sr4, the water outlet is not formed in one divided region, and the water outlet is individually formed in the other three divided regions.

  Moreover, the three water discharge ports 32A-32C should just be formed so that at least one may be included in each of three division area among four division area Sr1-Sr4, and straddle adjacent division area. It may be formed as follows. For example, while forming the second water discharge port 32B in the third divided region Sr3 and the third water discharge port 32C in the fourth divided region Sr4, the first water discharge port 32A straddles the first divided region Sr1 and the second divided region Sr2. You may form so that. In addition, the second water discharge port 32B may be formed so as to straddle the adjacent divided regions, or the third water discharge port 32C may be formed so as to straddle the adjacent divided regions. Good. In addition, from the viewpoint of obtaining the above-described operational effect (1), the three water discharge ports 32A to 32C are arranged such that an angle range equal to or more than ¼ round is separated from the center point Cp of the toilet bowl portion 14. It may be. Moreover, the washing water discharge amount and opening area of the three water discharge ports 32A to 32C are not limited to the contents of the embodiment. For example, the cleaning water discharge amounts of the three water discharge ports 32A to 32C may be the same, or only the cleaning water discharge amounts of the two water discharge ports among the three water discharge ports 32A to 32C may be the same.

  Moreover, from the viewpoint of obtaining the above-described operational effect (2), it is not essential to form the three water discharge ports 32A to 32C, and it is sufficient that at least two water discharge ports are 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 divided areas here are composed of a first divided area Sr1 and a fourth divided area Sr4, and the other is a second divided area Sr2 and a third divided area. It is composed of Sr3. In this case, the two water outlets include a first water outlet 32A formed in one of the two divided areas Sr1 to Sr4 and a second water outlet 32B formed in the front divided area. As long as it is included. In this case, the second water discharge port 32B may be formed in the same divided region as the divided region in which the first water discharge port 32A is formed, or may be formed in another divided region. The positions of these two water discharge ports 32A and 32B are not limited to the contents of the embodiment.

FIG. 14 is a schematic diagram illustrating an example of an arrangement pattern of the water discharge ports 32A and 32B that can obtain the effect (2).
From the viewpoint of obtaining the effect (2), for example, as shown in FIG. 14A, the first water discharge port 32A is formed in the first divided region Sr1, and the second water discharge port 32B is formed in the third divided region Sr3. Also good. Further, as shown in FIG. 14B, the first water discharge port 32A may be formed in the second divided region Sr2, and the second water discharge port 32B may be formed in the third divided region Sr3. In addition to this, as shown in FIG. 14C, a third water discharge port 32C may be further formed in the fourth divided region Sr4.

  In addition, 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 that their positions overlap in the vertical direction. In addition, each of the water outlets 32A to 32C of the rim portion 28 has any one of the water outlets 32A to 32C or all the water outlets 32A to 32C do not overlap in the vertical direction. You may arrange | position in the position shifted | deviated to the up-down direction. In this case, the front-rear center line Lb of the toilet bowl portion 14 is divided in the left-right direction by equally dividing the front-rear dimension of the inner surface portion of the toilet bowl portion 14 in a plan view of the horizontal section passing through the lowermost spout. It is defined by a straight line that extends.

  Further, as described above, the water discharger 36 joins the wash water discharged from the first water discharge port 32A and the wash water discharged from the second water discharge port 32B to generate the main flow Fw toward the inlet 16 of the drainage passage unit. Configured to form. The water discharger 36 can be configured to form such a main flow Fw by adjusting at least one of the positions of the water discharge ports 32A and 32B, the amount of discharge of the cleaning water, and the direction of discharge of the cleaning water.

  In addition, an example has been described in which the timing of starting the discharge of the cleaning water from the first water outlet 32A and the third water outlet 32C (hereinafter referred to as the “discharge start timing”) is the same. The discharge start timing may be earlier than the discharge start timing of the wash water from the second water discharge port 32B, and the discharge start timing may be shifted between the first water discharge port 32A and the third water discharge port 32C.

  Moreover, the water discharge part 36 demonstrated the example which adjusts the channel cross-sectional area of the water flow path corresponding to the water discharge ports 32A-32C, in order to adjust the washing water discharge amount of each water discharge port 32A-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 for each of the water discharge ports 32A to 32C. Further, a valve mechanism such as an electrically driven valve may be used to adjust the timing for starting the discharge of the cleaning water from each of the water discharge ports 32A to 32C.

DESCRIPTION OF SYMBOLS 10 ... Flush toilet bowl, 12 ... Toilet body, 14 ... Toilet bowl part, 16 ... Entrance, 20 ... Drainage passage part, 26 ... Receiving surface part, 28 ... Rim part, 28L ... Left side part, 28R ... Right side part, 32A ... 1st water outlet, 32B ... 2nd water outlet, 32C ... 3rd water outlet, 36 ... Water discharge part, 38b ... Right side water flow path (1st water flow path) 38c ... Left side water flow path (2nd water flow path), Sr1- Sr4: divided area, La: left-right center line, Lb: front-rear center line.

Claims (7)

A toilet body having a toilet bowl, a drainage passage communicating with the toilet bowl through an inlet formed at the bottom of the toilet bowl, and a water discharger for discharging washing water into the toilet bowl ,
The toilet bowl has a receiving surface for receiving filth, 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 wash water from the two water discharge ports into the toilet bowl portion on one side in the circumferential direction,
The toilet bowl portion is divided into a left and right center line that bisects the left and right dimension of the outer surface portion of the toilet body in a plan view, and a front and rear center line that bisects the front and rear dimension of the inner surface portion of the toilet bowl portion. Has four divided regions,
Among the four divided areas, the two outlets include a first outlet formed in a left and right divided area and a second outlet formed in a front divided area,
The water discharge part is disposed on the back side of the rim part, and has a hollow structure water supply part that supplies cleaning water to the two water discharge ports,
The water flow portion is disposed on the back side of the left and right side portions of the rim portion, and includes a first water passage for supplying cleaning water to the first water outlet, and a left and right side of the rim portion. A second water passage that is arranged to pass through the front-rear center line on the back side of the side portion and supplies wash water to the second water outlet,
The water discharge portion is configured to form a main flow toward the inlet by joining the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port.
The flush toilet is configured such that the wash water is discharged from the second water discharge port after the wash water is discharged from the first water discharge port.   2. The flush toilet according to claim 1, wherein a folded portion is formed in the second water passage so as to flow the washing water supplied from the upstream side so as to be led to the second water outlet.   The flush toilet according to claim 1 or 2, wherein the water discharge portion has a third water discharge port formed in the rim portion in a rear divided region of the four divided regions. The first water outlet, the second water outlet, and the third water outlet are sequentially arranged on one side in the circumferential direction,
The said water discharging part is comprised so that the total amount of the washing water discharge amount of a said 1st water discharge port and a said 2nd water discharge port may become larger than the washing water discharge amount of a said 3rd water discharge port. The flush toilet according to Item 3.   The said water discharging part is comprised so that washing water may be discharged from the said 2nd water outlet after the water is discharged from the said 1st water outlet and the said 3rd water outlet. A flush toilet according to 1.   The flush toilet according to any one of claims 1 to 5, wherein the second water discharge port is formed in a divided region on one side in the circumferential direction of the two divided regions on the front side. .   In the water discharge part, the wash water discharged from the first water discharge port and the wash water discharged from the second water discharge port merge on the inner peripheral surface of the toilet bowl part to form a main flow toward the entrance. The flush toilet according to any one of claims 1 to 6, wherein the flush toilet is configured to do so.

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