JP6548487B2 - Flush toilet bowl - Google Patents

Description

  The present invention relates to a flush toilet.

  Heretofore, various studies have been made on a cleaning method for cleaning the inside of the toilet bowl of a toilet bowl. Patent Document 1 proposes a toilet bowl cleaning apparatus in which three spouts are provided at the rear of a toilet bowl and the spouting mode of the flush water spouted from the three spouts can be changed by a switching valve. In this document, as a spouting mode of washing water, a spout mode using only one spout of three spouts and a mode using two spouts in combination are disclosed.

JP, 2006-9382, A

  By the way, the toilet bowl usually has a receiving surface for receiving dirt and a rim connected to the upper edge of the receiving surface. As a method for cleaning the toilet bowl, there is a method for cleaning the inside of the toilet bowl by spouting washing water to one side in the circumferential direction along the inner peripheral surface of the rim from the water outlet formed in the rim known. In this cleaning method, a wider range in the toilet bowl including the inner peripheral surface of the rim can be cleaned with the cleaning water than in the case where the inside of the toilet is cleaned by spouting the cleaning water downward from the spout of the rim. There is an advantage that good cleanliness can be obtained.

  As a result of examining the cleaning method, the inventor has come to recognize the following problems. In this cleaning method, while the cleaning water flows along the inner circumferential surface of the rim portion, the cleaning water flows downward by gravity. Therefore, in order to obtain a good rim cleaning ability, it is necessary to devise a method for allowing the cleaning water to reach the entire inner peripheral surface of the rim portion. When considered under such a viewpoint, the toilet bowl cleaning device of Patent Document 1 is not specially designed to clean the inner peripheral surface of the rim portion, and there is room for improvement in the rim cleaning capability. The

  The present invention has been made in view of such problems, and an object thereof is to provide a flush toilet which can obtain good rim cleaning ability.

In order to solve the above problems, a flush toilet according to an embodiment of the present invention includes a toilet bowl main body having a toilet bowl and a water discharger for discharging flush water into the toilet bowl, and the toilet bowl comprises: The water discharge portion has three water discharge ports formed in the rim portion, and the rim from the three water discharge ports has a receiving surface portion for receiving dirt and a rim portion connected to the upper edge portion of the receiving surface portion. A water discharge portion for discharging washing water on one side in the circumferential direction along the inner peripheral surface of the portion; and the toilet bowl portion divides the left and right dimensions of the outer surface portion of the toilet body into two equal parts in plan view It has four divided areas divided by the center line and the front and back central line which bisects the front and back dimension of the inner surface of the toilet bowl section in the front and rear direction, and the three water discharge ports include four divided areas It is individually formed in each of the three divided areas.
According to this aspect, an individual spout is formed in each of the three divided regions among the four divided regions. Therefore, rather than forming separate spouts in two of the four divided areas, the inner circumferential length of the rim portion from each spout to another spout adjacent to one side in the circumferential direction is It can be shortened. For this reason, it becomes easy to make washing water reach the whole inner skin of a rim part, and a good rim washing ability comes to be acquired.

In the above aspect, the three spouts may include a first spout having a flush water discharge amount greater than the other two spouts.
According to this aspect, the main flow can be easily formed in the toilet bowl portion by the flush water expelled from the first spout. Therefore, by adjusting the positions of the three water discharge ports, the discharge direction of the washing water, and the like, the flow of the main flow in the toilet bowl can be variously set, and the degree of freedom of the washing mode by the washing water can be enhanced.

In the above aspect, the first outlet may be provided in the rear divided area of the four divided areas.
It is necessary to secure a large passage cross-sectional area in order to increase the flush water discharge amount of the first discharge port compared to the other water discharge ports, for the water flow path which supplies the wash water to the first water discharge port. According to this aspect, in order to provide the first discharge port having a large flush water discharge amount in the divided area on the rear side, the longitudinal dimension of the water flow passage having a larger passage cross-sectional area than providing the first discharge port in the divided area on the front side This makes it easy to miniaturize the water discharge part. Therefore, the entire water discharger can be easily miniaturized while obtaining a good rim cleaning ability.

  Further, in the above-described embodiment, among the four divided areas, the other two water outlets are not formed in the divided area adjacent to one side in the circumferential direction with respect to the divided area in which the first water outlet is formed. It is good.

In the above aspect, the rim portion has three rim water conduits formed so as to extend to one side in the circumferential direction from each of the three water discharge ports, and the water discharge portion is flush water for each of the three water discharge ports. The magnitude relationship of the discharge amount may be configured to be the same as the magnitude relationship of the inner circumferential lengths of the three rim water conduits connected to each of the three water discharge ports.
According to this aspect, a large amount of washing water can flow in the rim water conduit having a long inner circumferential length, and a sufficient amount of washing water can be easily made to reach the entire rim water conduit. In addition, by using a small amount of flush water in the rim water channel with a short inner circumferential length, it is possible to reduce the amount of flush water used in the rim channel. Therefore, it is easy to reduce the amount of washing water used to wash the entire inner peripheral surface of the rim while obtaining a sufficient rim cleaning ability by allowing sufficient amount of wash water to reach the entire inner peripheral surface of the rim. it can.

  In the above aspect, the water discharger may be configured such that the magnitude relationship between the washing water discharge amount of each of the three water outlets is equal to the magnitude relationship of the opening area of each of the three water outlets.

In the above aspect, the three water discharge ports may be individually formed in each of the divided area on one side in the circumferential direction of the two front divided areas and the two rear divided areas.
According to this aspect, when the small water hits the inner peripheral surface area including the left and right center position on the front side of the rim portion, the small water transmitted along the inner peripheral surface area is difficult to enter from the spout to the back side . Therefore, the possibility of the urine component remaining behind the spout can be suppressed, and the generation of dirt and odor can be prevented accordingly.

In the above-described embodiment, one of the three water outlets is provided in a divided area on one side in the circumferential direction of the two front divided areas, and the water discharge part is cleaned in one water outlet. It has a water flow path for supplying water, and the water flow path is along the back and forth direction on the back side of the side portion on the side where the divided region on the one side in the circumferential direction among the side portions on the left and right It may be formed to extend.
According to this aspect, it is possible to arrange the water passages in a layout not passing through the back side of the left and right center position on the front side of the rim portion. Therefore, it is possible to shorten the water flow path for supplying washing water to one water discharge port by arranging the water flow path so as to pass through the back side of the left and right center position on the front side of the rim portion. It will be possible to exude strong washing water from water. As a result, better rim cleaning ability can be obtained.

Further, in the above-described embodiment, a folded portion is formed at the downstream end of the water flow channel so as to fold wash water supplied from the upstream side and guide it to one spout port, and one spout port is a toilet bowl The circumferential end portions of the two wall portions may be arranged so as to be aligned on an imaginary line extending from the center point of the toilet bowl portion.
According to this aspect, it becomes difficult to form separate water channel parts that are continuous with the upstream end and the downstream end of the folded back part on the back side of one water discharge port, aligned in the radial direction of the toilet bowl part. This makes it easy to design such that the portion with the smallest passage cross-sectional area in the water flow path for supplying the flush water to the spout will be one spout.

  According to the present invention, it is possible to provide a flush toilet which can obtain good rim cleaning ability.

It is side surface sectional drawing of the flush toilet 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 center line of a toilet bowl main body, and the front-back center line of a toilet bowl part. It is a figure which shows the flow of the wash water in the initial stage in the toilet bowl part which concerns on embodiment. It is a figure which shows the flow of the wash water in the middle step in the toilet bowl part which concerns on embodiment. It is another figure which shows the flow of the wash water in the middle step in the toilet bowl part which concerns on embodiment. It is a figure which shows the internal peripheral length of the 1st rim water conduit to a 3rd rim water conduit of a rim | limb part. It is a figure which shows how to convey small water, FIG. 9 (a) is a figure which shows the toilet body which concerns on a 1st modification, FIG.9 (b) is a figure which shows the toilet body which concerns on embodiment. It is a figure for demonstrating the centrifugal force provided to wash water. Fig.11 (a) is a figure which shows the structure of the 2nd water outlet circumference which concerns on embodiment, FIG.11 (b) is a figure which shows the structure of the 2nd water outlet vicinity 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 which can obtain an effect (1). It is a schematic diagram which shows the example of the arrangement pattern of the spout 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 overlapping description will be omitted. Moreover, in each drawing, a part of component is suitably abbreviate | omitted for the facilities of description.

FIG. 1 is a side cross-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 bowl body 12 made of pottery. The toilet body 12 is a wall mounted toilet attached to 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, and a toilet lid and seat supported rotatably in the upper and lower direction on the box are disposed above the toilet body 12.

  As shown in FIG. 1, the toilet body 12 passes through the toilet bowl 14 formed at the front of the toilet bowl 12 and the inlet 16 formed at the bottom of the toilet bowl 14 (see also FIG. 2). And a trap portion 18 in communication with the interior of the housing 14. The trap portion 18 is a part of the drainage passage portion 20 for discharging the waste in the toilet bowl 14 to the sewage side water passage (not shown). The drainage passage portion 20 includes a connection pipe 22 connected to the downstream end of the trap portion 18 in addition to the trap portion 18, and the wastes are discharged to the sewage side water passage through these. Sealing water 24 for blocking the flow of air in the water flow direction is stored in the trap portion 18, and backflow of odor from the sewage side water passage is prevented by the sealing water 24.

FIG. 3 is a cross-sectional view taken along line AA of FIG.
As shown in FIGS. 1 and 3, the toilet bowl 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 has 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 of the receiving surface portion 26 And a recess 30 formed to be recessed downward from the portion.

  The receiving surface portion 26 and the recess 30 are continuously provided in an annular shape. The receiving surface portion 26 is formed to be inclined downward toward the center of the ring. The recess 30 is formed to have a bottom, and the inlet 16 of the trap portion 18 is opened at the bottom thereof. A part of the sealing water 24 is stored in the recess 30.

  The rim portion 28 is formed with three water discharge ports 32A to 32C (described later). The rim portion 28 has three rim water conduits 34A to 34C which are formed to extend in the circumferential direction of the toilet bowl 14 from each of the three water discharge ports 32A to 32C. Hereinafter, the spouts 32A to 32C are collectively referred to as "the spout 32", and the rim conduits 34A to 34C are collectively referred to as the "rim conduit 34".

  The rim conduit 34 is formed to swirl the wash water discharged from the water outlet 32. The rim water conduit 34, as shown in FIG. 1, includes a shelf 34a extending from the upper end edge 26a of the receiving surface 26 toward the outside of the toilet bowl 14, and a standing wall 34b rising from the outer peripheral end of the shelf 34a. And an overhang portion 34c extending from the upper end portion of the upright wall portion 34b to the inside of the toilet bowl portion 14. The radial dimension of the shelf portion 34a is formed so as to become shorter as it separates from the water outlet 32 in the swirling flow direction Da (described later), as shown in FIG. The overhang part 34c is also the same. As a result, the flush water expelled from the spout 32 gradually drops to the receiving surface portion 26 as it is separated from the spout 32.

  The three rim conduits 34 include a first rim conduit 34A to a third rim conduit 34C corresponding to the three first water outlets 32A to the third water outlets 32C, respectively. The first rim water conduit 34A is formed in the vicinity of the second water outlet 32B as the end position 34Aa and extends in the swirling flow direction Da from the first water outlet 32A to the end position 34Aa in plan view Be done. The second rim water conduit 34B is formed in the vicinity of the third water discharge port 32C, with the inside thereof as the end position 34Ba, extending in the swirling flow direction Da from the second water discharge port 32B to the end position 34Ba. The third rim conduit 34C is formed to extend from the third water outlet 32C to the end position 34Ca, with the inside and the vicinity of the first water outlet 32A as the end position 34Ca. Each of the rim water conduits 34A to 34C is formed to extend over an angle range of at least 1⁄4 of an angle range around a center point Cp (described later) of the toilet bowl 14.

FIG. 4 is a view for explaining the left and right center line La of the toilet body 12 and the front and rear center line Lb of the toilet bowl 14.
The left and right center line La of the toilet body 12 means a straight line extending in the front-rear direction by bisecting the left and right dimension Lx of the outer surface portion of the toilet body 12 in plan view. Specifically, a straight line that bisects the left and 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 and right center line La. Further, the longitudinal center line Lb of the toilet bowl portion 14 divides the front and rear dimensions Ly of the inner surface portion of the toilet bowl portion 14 in a plan view of the horizontal cross section passing through the spouts 32A to 32C of the toilet bowl portion 14 Straight line extending along the left and right direction. Specifically, a straight line that bisects the longitudinal 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 center line Cp of the above-mentioned toilet part 14 means the intersection of the left-right center line La and the front-back center line Lb.

  The above toilet bowl 14 has four divided regions Sr1 to Sr4 which are divided by the left and right center line La of the toilet bowl 14 and the front and rear center line Lb in plan view. Hereinafter, among the four divided areas, a divided area on the rear side with respect to the front and rear center line Lb and a divided area on the right side with respect to the left and right center line La will be referred to as a first divided area Sr1. Further, among the four divided areas, the divided areas in the counterclockwise direction in plan view from the first divided area Sr1 are sequentially referred to as a second divided area Sr2, a third divided area Sr3, and a fourth divided area Sr4. The second divided area Sr2 and the third divided area Sr3 become the front divided areas, and the first divided area Sr1 and the fourth divided area Sr4 become the rear divided areas.

  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 discharger 36 has a water discharger 38 which will be described later, in addition to the three water outlets 32A to 32C. The water discharger 36 is for discharging wash water from the three water outlets 32A to 32C along the inner circumferential surface of the rim 28 in the swirling flow direction Da. The water discharger 36 discharges the washing water from the water discharge ports 32A to 32C into the toilet bowl 14 to form a swirling flow that swirls in the toilet bowl 14 in one direction. In the present embodiment, a swirling flow is formed, which swirls on one side Da in the circumferential direction of the toilet bowl 14 (counterclockwise direction). Hereinafter, one side Da in the circumferential direction is referred to as a swirling flow direction Da.

  The three water discharge ports 32A to 32C are individually formed in each of the three divided regions among the four divided regions Sr1 to Sr4 of the toilet bowl portion 14. Specifically, in the three water discharge ports 32A to 32C, the first water discharge port 32A located in the first divided area Sr1, the second water discharge port 32B located in the third divided area Sr3, and the fourth water divided area Sr4 And a third outlet 32C. Any of the water discharge ports 32A to 32C is formed to open in the swirling flow direction Da.

  The water passing portion 38 is a portion of a hollow structure disposed on the back side of the rim portion 28 (radially outside of the toilet bowl portion 14). The water flow portion 38 communicates with the water discharge ports 32A to 32C, and serves as a passage of the washing water supplied to the water discharge ports 32A to 32C. The water passage portion 38 includes an inflow passage 38 a, a right water passage 38 b (first water passage), and a left water passage 38 c (second water passage). The inflow path 38 a is disposed behind and behind the rim portion 28. The right water flow passage 38 b is disposed on the back side of one right side portion 28 </ b> R of the left and right side portions of the rim portion 28. The left water passage 38 c is disposed on the back side of the other left side portion 28 </ b> L of the left and right side portions of the rim portion 28.

  As shown in FIG. 1, washing water supplied from a water supply pipe 102 which is a part of the washing water supply device flows into the inflow path 38 a. 1 and 2 show a supply path Ra of washing water from the water supply pipe 102 to the inflow path 38a. The washing water flows into the inflow path 38a through the introduction hole 38e which is disposed at the rear of the rim portion 28 and is formed in the rear wall portion 38d which divides the inflow path 38a. In the present embodiment, the flush water supply apparatus supplies flush water by a direct water supply type water supply system using the supply water pressure of the tap water. As shown in FIG. 3, the inflow path 38a is formed to extend in the left-right direction from the front of the introduction hole 38e which is the inflow position Pa of the cleaning water from the cleaning water supply device. The right water conduit 38b communicates with one end of the inflow path 38a in the left-right direction, and the left water conduit 38c communicates with the other end in the left-right direction.

  The right water passage 38 b is formed to extend in the front-rear direction on the back side of the right side portion 28 R of the rim portion 28. A first outlet 32A is formed at the downstream end of the right water passage 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 and back extending portion 38cb communicating with the folded portion 38ca and formed to extend along the front-rear direction. included. A second outlet 32B is formed at the downstream end of the folded portion 38ca, which is the downstream end of the left water passage 38c. A bifurcated portion 38cc is formed in the longitudinally extending portion 38cb of the left water conduit 38c so as to extend in the swirling flow direction Da and radially inward from a midway position in the longitudinal direction. A third water discharge port 32C is formed at the downstream end of the branched portion 38cc, which is a midway position of the left water passage 38c. The inner bottom surface 38cd in the range from the middle position of the front and rear extension portion 38cb to the branch portion 38cc is formed to rise as it approaches the third water discharge port 32C.

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

Next, a method of cleaning the toilet bowl 14 using the flush toilet 10 described above will be described.
The flush toilet 10 flushes the inside of the toilet bowl 14 by a so-called wash-off washing method in which the waste in the toilet bowl 14 is washed out of the trap 18 using the head of water. Washing water within a predetermined flow rate range is supplied from the washing water supply device into the water passing portion 38 of the flush toilet 10 by the operation of the operation member such as the switch and lever for starting the washing water supply. Hereinafter, an operation from the start to the end of the supply of the cleaning water within a predetermined flow rate range will be described as one cleaning operation.

  The flush water flows into the inflow path 38a of the water flow portion 38, and the flush water that has flowed in flows through the right water flow path 38b and the left water flow path 38c and is spouted from the spouts 32A to 32C. When the inside of the water flow portion 38 is filled with the wash water, the water pressure according to the water supply pressure is applied to the wash water in the water flow portion 38 by the wash water supply device, and the wash water to which the water pressure is applied is each spout 32A. It is exhaled from ~ 32C.

FIG. 5 is a view showing how flush water flows in the toilet bowl 14. As shown in FIG. This figure shows the initial stage (first stage) in which the flush water starts to flow into the toilet bowl 14. In the drawing, the flow of washing water in the toilet bowl 14 is indicated by an arrow.
In the initial stage, flush water is expelled from the first spout 32A and the third spout 32C into the toilet bowl 14, and flush water is not expelled from the second spout 32B. The flush water expelled from the first outlet 32A forms a flow Dwa that swirls along the first rim conduit 34A. Further, the flush water expelled from the third water outlet 32C forms a flow Dwb that swirls along the third rim conduit 34C. The washing water flowing along each rim water conduit 34A, 34C gradually flows down from the shelf 34a of each rim water conduit 34A, 34C to the receiving surface 26 to form a flow Dwc which turns downward toward the receiving surface 26. .

  As described above, in order to adjust the timing to start the discharge of the wash water of each water discharge port 32A to 32C, the water discharger 36 extends from the inflow position Pa of the wash water in the water flow section 38 to each water discharge port 32A to 32C. The length of the water flow path is set to satisfy a predetermined condition. Specifically, the lengths of the water flow paths from the inflow position Pa of the flush water in the water flow portion 38 to each of the first outlet 32A, the second outlet 32B and the third outlet 32C are La1, La2, It is called La3. At this time, the length La2 of the water passage of the second water outlet 32B is set to be longer than the lengths La1 and La3 of the water passages of the first water outlet 32A and the third water outlet 32C.

  The timing at which the first water discharge port 32A and the third water discharge port 32C start to discharge the washing water is the same timing in this embodiment. Here, “equivalent” includes both the case where both of the contrast targets are the same and the case where the two are almost the same. Here, it means that the case where the timing which starts discharge of washing water is the same, and the case where it is substantially the same are included. The interpretation of "equivalent" is the same as below.

6 and 7 are other views showing the flow of washing water in the toilet bowl 14. FIG. This figure shows the intermediate stage (second stage) after time has passed from the initial stage. 6 shows a cross-sectional view of the flush toilet 10 taken along the line A-A in the same manner as FIG. 3, and FIG. 7 shows a side partial cross-sectional view of the flush toilet 10. As shown in FIG. First, it will be described with reference to FIG.
In the middle of the process, washing water is discharged into the toilet bowl 14 from the second water outlet 32B in addition to the first water outlet 32A and the third water outlet 32C. The flow of the flush water spouted from the first spout 32A and the third spout 32C is the same as in the initial stage.

  The flush water spouted from the second spout 32B forms a flow Dwd that swirls along the second rim conduit 34B. The washing water flowing along the second rim conduit 34B gradually flows from the shelf 34a of the second rim conduit 34B to the receiving surface 26 to form a flow Dwe that turns downward toward the receiving surface 26. Flows Dwa, Dwb, Dwc, Dwd, and Dwe are formed as a swirling flow that swirls in the toilet bowl 14 in the swirling flow swirling direction Da by the flush water discharged from the water discharge ports 32A to 32C. Among these, the flows Dwc and Dwe turn while facing the lower side of the receiving surface 26 of the toilet bowl 14 and flow into the recess 30 from above the receiving surface 26.

  The stream Dwc includes a stream Dwc (1) formed by combining a part of the flush water expelled from the second outlet 32B and a part of the flush water expelled from the third outlet 32C. The flow Dwc (1) is mainly formed on the rear receiving surface 26 of the recess 30. Further, the flow Dwc includes a flow Dwc (2) formed by combining a part of the flush water expelled from the third spout 32C and a part of the flush water expelled from the first spout 32A. Be The flow Dwc (2) is mainly formed on the receiving surface portion 26 of the second divided area Sr2, which is the upstream divided area of the two front divided areas Sr2 and Sr3.

  Here, a part of the washing water spouted from the second water discharge port 32B merges with a part of the washing water discharged from the first water spout 32A to form a main flow Fw toward the inlet 16 of the trap portion 18. Main stream Fw is mainly the third divided area Sr3, which is the downstream divided area of the two front divided areas Sr2 and Sr3, and the third divided area Sr3 that is adjacent to the third divided area Sr3 in the swirling flow direction Da It forms on the receiving surface part 26 in the range to 4 division area Sr4. More specifically, the main flow Fw is a third divided area on the front side with the third divided area Sr of the two front divided areas Sr2 and Sr3 (left side) viewed from the recess 30 of the toilet bowl 14 It is formed on the receiving surface part 26 of Sr3 and 4th division area Sr4 (refer range Sa).

  The main flow Fw has a strong water flow and a large flow when the cleaning water discharged from each of the first outlet 32A and the second outlet 32B merges. The main flow Fw flows from above the receiving surface 26 toward the inlet 16 of the trap 18 through the inside of the recess 30, as shown in FIGS. More specifically, the main flow Fw flows from the third divided area Sr3 to the fourth divided area Sr4 on the receiving surface portion 26, that is, after flowing from the front side to the rear side on the receiving surface portion 26, On the other hand, it flows into the recess 30 from the obliquely front side (left side and front side). At this time, the dirt in the recess 30 of the toilet bowl 14 is swept into the trap portion 18 through the inlet 16 using the head of the washing water flowing as the above-mentioned swirling flow, in particular, the head of the washing water flowing as the main flow Fw. . Here, “the head of the flush water flowing as the main flow Fw” means the difference in height from the joining position of the flush water spouted from each of the first spout 32A and the second spout 32B to the inlet 16 of the trap portion 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, after colliding with the right side wall portion 30a (first side wall portion) of the recessed portion 30, A directed flow Dwf is formed. The flow Dwf flows along the right side wall 30a of the recess 30, and then flows to collide with the left side wall 30b. The flow Dwf tends to rise while being pushed up by the force when it collides with the right side wall 30a or the left side wall 30b of the recess 30. The rising flow Dwf flows toward the inlet 16 of the trap portion 18 by merging 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 range Sb). Form Dwg. Similar to the flow Dwc (2), the flow Dwg also flows from the front side to the rear side in the toilet bowl 14.

The operation and effect of the flush toilet 10 described above will be described.
(1) According to the flush toilet 10 described above, the individual water discharge ports 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 spouts in two of the four split areas Sr1 to Sr4, a rim from each spout 32A to 32C to another spout adjacent to the swirling flow direction Da can be provided. The inner circumferential length of the portion 28 can be shortened. Suppose that spouts are formed individually in the two divided areas. The washing water flowing along the inner circumferential surface of the rim portion 28 flows downward by gravity. Therefore, in this case, when the inner circumferential length of the rim portion 28 from the water discharge port to the other water discharge port becomes long, it becomes difficult for a sufficient amount of washing water to reach the position away from the water discharge port. In this respect, according to the present embodiment, since the inner circumferential length of the rim portion 28 from the spout to the other spout can be shortened in the entire rim portion 28, wash water can be made to reach the entire inner circumferential surface of the rim portion 28. It will be easier to get good rim cleaning ability.

(2) Further, the main flow Fw directed to the inlet 16 of the trap portion 18 is formed by the combination of the wash water expelled from the first spout 32A and the flush water expelled from the second spout 32B. Since the second water discharge port 32B is in the third divided area Sr3 on the front side, a path in which the washing 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 area. Can be shortened. As a result, the water flow of the main flow Fw formed by the washing water spouted from the second water discharge port 32B becomes strong, and the waste F in the toilet bowl 14 is pushed out to the inlet 16 of the trap portion 18 by the main water flow Fw. Good waste discharge performance can be obtained.

  Further, the main flow Fw toward the inlet 16 of the trap portion 18 is the washing water discharged from the first water discharge port 32A and the washing water discharged from the second water discharge port 32B on the receiving surface portion 26, that is, the toilet bowl portion 14 It merges and is formed on an inner skin. Therefore, the receiving surface portion 26 can be cleaned by the mainstream Fw of strong water, and good toilet cleaning performance can be obtained.

  In addition, in order to obtain good rim cleaning ability, soil drainage performance and toilet bowl cleaning performance, increase the total amount of cleaning water used for single toilet bowl cleaning or increase the opening area of the spout to increase the amount of cleaning water discharged. The method of increasing it is also conceivable. In this respect, according to the present embodiment, since it is not necessary to increase the total amount of flush water used for one toilet bowl flush, good rim flush performance, dirt discharge performance, toilet bowl while preventing an increase in the total flush water amount. It becomes possible to obtain the cleaning performance. In addition, since it is not necessary to increase the opening area of the water discharge port, it is possible to obtain good rim cleaning performance, dirt discharge performance, and toilet bowl cleaning performance while preventing an increase in the opening area of the water discharge port. 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, dirt discharging performance and toilet bowl cleaning performance while obtaining a good appearance. .

  In addition, in order to allow the washing water to reach the entire inner peripheral surface of the rim portion 28, the larger the inner circumferential length of the rim portion 28 from one spout to the other spout, the flush water discharge amount of the one spout In addition, it is necessary to increase the size of the rim channel 34 connected to one water outlet. In this respect, according to the present embodiment, the inner circumferential length of the rim portion 28 from one spout to the other spout can be made shorter than when two spouts are formed in the rim portion 28. Therefore, in order to allow the washing water to reach the entire inner peripheral surface of the rim portion 28, the washing water discharge amount of the three water discharge ports 32A to 32C can be reduced, and the width of the shelf portion 34a of the rim water conduit 34 or Dimensions such as height of standing wall part 34b can be made small.

  In addition, since the water discharger 36 is configured to discharge wash water from the second water discharge port 32B after the wash water is discharged from the first water discharge port 32A and the third water discharge port 32C, there are the following advantages. The main flow rate can be increased without increasing the total flush water volume by increasing the ratio of the mainstream flow rate, which is the flow rate of the mainstream Fw to the total flush water volume used for one washing operation, and the dirt discharge capacity can be increased by increasing the mainstream flow rate. , Toilet bowl cleaning ability can be enhanced. According to the present embodiment, since the amount of flush water discharged from the second outlet 32B and flowing into the inlet 16 without merging can be reduced, the ratio of the main flow rate to the total flush water can be increased. Therefore, the waste discharge capacity and the toilet bowl cleaning capacity can be enhanced by increasing the ratio of the mainstream flow rate without increasing the total flush water volume.

Next, other features of the first to third water outlets 32A to 32C will be described.
In the water discharger 36, the amount of flush water discharged from the first spout 32A is the largest, the amount of flush water discharged from the second spout 32B is the second largest, and the flush water discharge amount from the third spout 32C is smallest. Configured That is, the first water discharge port 32A, the second water discharge port 32B, and the third water discharge port 32C are configured to decrease the washing water discharge amount in the order. From another point of view, the first water discharge port 32A is configured to have a larger amount of flush water discharge than the other two second water discharge ports 32B and the third water discharge port 32C. Here, the flush water discharge rate refers to the flush water flow rate (L / s) per unit time passing through the water outlet.

  In order to satisfy the magnitude relationship of the washing water discharge amount of each of the water discharge ports 32A to 32C, the water discharger 36 is configured as follows. The water flow path in the water flow portion 38 from the inflow position Pa (see FIG. 3) of the flush water from the flush water supply device to the respective water discharge ports 32A to 32C will be examined. It is assumed that there is a water passage corresponding to each of the first water discharge port 32A to the third water discharge port 32C. The flush water discharge amount of the spout port has a size proportional to the channel cross-sectional area of a portion (hereinafter referred to as a flow rate setting unit) where the channel cross-sectional area is the smallest in the water flow path supplying flush water to the spout port. In the present embodiment, the flow rate setting portion of the first water discharge port 32A is the first water discharge port 32A itself at the downstream end of the water flow path of the first water discharge port 32A. The flow rate setting portion of the second water outlet 32B also becomes the second water outlet 32B itself, and the flow rate setting portion of the third water outlet 32C also becomes the third water outlet 32C itself.

  The water discharger 36 is configured such that the opening area which 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 second largest, and the third water discharge port 32C is the smallest. That is, the opening area is reduced 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 outlet 32A is larger than that of the second outlet 32B and the third outlet 32C. The opening area (passage cross-sectional area) here means the cross-sectional area in the cross section orthogonal to the water flow direction. Thus, the magnitude relationship of the washing 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 view showing inner circumferential lengths Lb1 to Lb3 of the rim water conduits 34A to 34C of the rim portion 28. As shown in FIG.
Here, the inner circumferential length refers to the end positions 34Aa to 34A to 34C of the rim conduits 34A to 34C from the water outlets 32A to 32C at the start positions of the rim conduits 34A to 34C in the horizontal cross section passing through the rim portion 28. The length of the inner circumferential surface in the range up to 34Ca. For example, the inner circumferential length Lb1 of the first rim water conduit 34A is the length of the inner circumferential surface ranging from the first water outlet 32A to the end position 34Aa of the first rim water conduit 34A.

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

  In the water discharger 36, the magnitude relationship of the washing water discharge amount of each of the three water discharge ports 32A to 32C is within 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 configured to be the same as the magnitude relationship of the circumferential lengths Lb1 to 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 amount of flush water discharge. In addition, the third water discharge port 32C connected to the third rim water conduit 34C having the shortest inner circumferential length Lb3 has the smallest amount of flush water discharge.

  More specifically, in the water discharger 36, the ratio of the wash water discharge amount of each of the three water discharge ports 32A to 32C is a first rim water conduit 34A to a third rim water conduit in which each of the three water discharge ports 32A to 32C is connected. It is configured to satisfy the relationship equal 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 flush water discharge amount of each of the three water discharge ports 32A to 32C satisfies a relationship equivalent to 5: 3: 2 Configured The water discharger 36 is configured such that the ratio of the washing water discharge amount of each of the three water discharge ports 32A to 32C is equal to the ratio of the opening area of each of the three water discharge ports 32A to 32C. Be done.

  According to the above-mentioned feature, since the first water discharge port 32A has a larger discharge amount of flush water than the other second water discharge port 32B and the third water discharge port 32C, the toilet bowl 14 by flush water discharged from the first water outlet 32A. It becomes easy to form the mainstream Fw inside. Therefore, by adjusting the positions of the water discharge ports 32A to 32C, the discharge direction of the washing water, and the like, the flow of the main flow Fw in the toilet bowl 14 can be set variously, and the degree of freedom of the washing mode by the washing water Can be enhanced.

  Further, the magnitude relationship of the washing water discharge amount of the three water discharge ports 32A to 32C is the same as the magnitude relationship of the inner circumferential length 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 be allowed to flow through the first rim water conduit 34A having a long inner circumferential length, and a sufficient amount of washing water can be easily delivered to the entire first rim water conduit 34A. Further, by using a small amount of flush water in the third rim conduit 34C having a short inner circumferential length, it is possible to suppress the amount of flush water used in the third rim conduit 34C. Therefore, a sufficient amount of washing water can be delivered to the entire inner peripheral surface of the rim portion 28 to obtain a good rim cleaning ability, while the amount of washing water used for cleaning the entire inner peripheral surface of the rim portion 28 It can be easily suppressed.

  In addition, since the first outlet 32A having a larger discharge amount of washing water than the other two outlets 32B and 32C is provided in the first divided area on the rear side, there are the following advantages. The right side water passage 38b for supplying washing water to the first water discharge port 32A has a passage cross-sectional area larger than the left water flow passage 38c in order to increase the flush water discharge amount of the first water discharge port 32A than the other water discharge ports 32B and 32C. Need to ensure. According to the present embodiment, in order to provide the first water discharge port 32A having a large washing water discharge amount in the divided area on the rear side, the right side passage is larger than the first water discharge port 32A in the divided area 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 miniaturize the entire water discharger 36 while obtaining a good rim cleaning ability, a dirt discharging ability, and a toilet bowl cleaning ability.

  In the water discharger 36, the total amount (hereinafter also referred to as the total discharge amount) of the flush water discharge amount of the first water outlet 32A and the second water outlet 32B is larger than the flush water discharge amount of the third water outlet 32C. Configured as. As a result, it can be expected to use a washing water amount of half or more of the total washing water amount used in one washing operation to form the mainstream Fw. Therefore, the flow rate of the mainstream Fw of strong water can be increased, and by washing the receiving surface portion 26 of the toilet bowl 14 with the mainstream Fw of high water flow and high flow, it is possible to obtain a better toilet washing ability. In addition, the dirt in the toilet bowl 14 is flushed to the inlet 16 of the trap portion 18 due to the strong water flow and the large flow of the main flow Fw, whereby a particularly good dirt discharge performance can be obtained. From the viewpoint of obtaining such effects, in the water discharger 36, the ratio of the total discharge amount of the first water discharge port 32A and the second water discharge port 32B is 60% to 80% with respect to the total flush water amount used in one washing operation. Preferably, it is configured to be The total washing water amount here is synonymous with the total amount of the washing water discharge amount of each of the first water discharge port 32A to the third water discharge port 32C.

  In addition, it is preferable that the water discharger 36 be configured so that the ratio of the flush water discharge amount of the first water outlet 32A to the total flush water amount used in one flush operation is 40% to 60%.

The further another characteristic regarding the 1st water outlet 32A-the 3rd water outlet 32C is demonstrated.
The first to third water discharge ports 32A to 32C are, as shown in FIG. 3, a third of the two second divided areas Sr2 on the front side and the third divided area Sr3 on the downstream side of the swirling flow direction Da. It is separately formed in each of division area Sr3 and two 1st division area Sr1 of the back side, and the 4th division area. In other words, the first water discharge port 32A to the third water discharge port 32C are located in the second divided area Sr2 on the upstream side of the swirling flow swirling direction Da of the second divided area Sr2 and the third divided area Sr3 of the two front sides. Is not formed.

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

  In this respect, according to the present embodiment, as shown in FIG. 9B, when small water hits the inner peripheral surface area including the left and right center position 28a on the front side of the rim portion 28, the inner peripheral surface area is It becomes difficult for the small water transmitted along the circumferential direction to enter from the second water outlet 32B to the far side in the left water passage 38c. Therefore, the possibility that the urine component will remain on the back side of the second water discharge port 32B (in the water flow portion 38 of the water discharge portion 36) can be suppressed, and the generation of dirt and odor can be prevented accordingly. Therefore, good cleanliness can be obtained while obtaining good rim cleaning ability.

According to the above-described configuration, there are also the following advantages. FIG. 10 is a view showing the toilet body 12 according to the first modification of FIG. 9 (a).
A centrifugal force Fc directed radially outward is applied to the washing water flowing along the inner peripheral surface of the toilet bowl portion 14. The centrifugal force Fc becomes larger as the curvature radius of the portion where the washing water flows becomes smaller, and as the centrifugal force becomes larger, the water flow of the water flowing toward the inlet 16 of the trap portion 18 becomes weaker.

  Suppose that the second water discharge port 32B is provided in the second divided area Sr2. In this case, the flush water spouted from the spout 32 flows through the inner circumferential surface area at the left and right center position Pa on the front side of the rim portion 28. In the inner peripheral surface area at the left and right center position Pa, since the toilet bowl 14 is formed in an elliptical shape whose front and rear dimensions are larger than the left and right dimensions, the radius of curvature tends to be smaller than other positions. Therefore, when the second water discharge port is provided in the second divided region Sr2, the water force of the wash water discharged from the second water discharge port 32B is easily weakened by the centrifugal force Fc.

  In this respect, 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 at the left and right center position of the rim portion 28 having a small curvature radius. It can flow toward the inlet 16 of the trap portion 18 without passing through the inner circumferential surface area at Pa. Therefore, the mainstream Fw formed by the washing water spouted from the second spout 32B is less likely to weaken due to the centrifugal force Fc, and the toilet bowl is better than placing the second spout 32B in the second divided region Sr2. You will be able to gain 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 for supplying the washing water to the second water discharge port 32B is formed to extend in 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 of the left side portion 28L and the right side portion 28R of the rim portion 28 on which the third divided region Sr3 in which the second outlet 32B is formed is provided. Be done. The left water passage 38c is formed to cross the longitudinal centerline Lb on the back side of the left side portion 28L in plan view. From another point of view, the left water passage 38c is not formed across the longitudinal centerline Lb on the back side of the right side portion 28R of the rim portion 28. This advantage is explained.

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

  In addition, temporarily, when arranging the water flow passage so as to pass through the left and right center position Pb back side of the front side of the rim portion 28, the water flow passage for the first water discharge port 32A and the water flow passage for the second water discharge port 32B It is necessary to arrange side by side on the back side of the right side portion 28R of 28. In this respect, according to the above-described configuration, the right water flow passage 38b for the first water discharge port 32A and the left water flow passage 38c for the second water discharge port 32B are arranged in the lateral direction on the back side of 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 to FIG. 1, FIG. 2, the width dimension of the side part 12b extended laterally from the upper end edge of the toilet bowl part 14 among the upper surface parts 12a of the toilet body 12 can be made small.

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

  Thus, curvature reduction sections 34Bc and 34Cb that are continuous from the water discharge ports 32B and 32C are formed on the inner circumferential surfaces of the rim water conduits 34B and 34C. Therefore, in the range from spouting from each spout 32B, 32C to passing straight section 34Bb, 34Ca, the flush water with strong water immediately after spouted from each spout 32B, flows in the section with a large radius of curvature. Therefore, it is difficult to apply a large centrifugal force to the washing water flowing in the range. For this reason, the water flow toward the inlet 16 of the trap portion 18 after spouting from the spouts 32B and 32C is less likely to weaken from the state of strong water immediately after spouting from the spouts 32B and 32C. As a result, it is possible to push in the filth by the stronger water flow and to obtain a better filth discharge performance.

Fig.11 (a) is a figure which shows the structure of the 2nd water outlet 32B periphery which concerns on embodiment.
The second water discharge port 32B includes an inner standing wall 34b (hereinafter, also referred to as an inner standing wall 34b (1)) and an outer standing wall 34b (hereinafter, an outer standing wall 34b (2). It is partially formed by Of the two standing walls 34 b, a circumferential end 34 ba of the outer standing wall 34 b (2) and a circumferential end 34 bb of the inner standing wall 34 b (1) are virtual extending from the center point Cp of the toilet bowl 14 It is arranged to line up on the line Lc. Here, “arranged” includes the case where two angled wall portions 34 b are arranged so that the overlapping angle range 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 upright wall portions 34 b are arranged such 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 is explained.

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

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

  In addition, since the second water discharge port 32B is formed in the divided area Sr3 on the front side of the toilet bowl portion 14, the second water discharge port 32B is at a position where it is difficult for the user to visually recognize in normal use. Accordingly, the circumferential ends 34ba and 34bb of the two vertical wall portions 34b forming the second water discharge port 32B are arranged side by side, and in some cases, the second water discharge port 32B can be viewed from the back side. Even if the second spout 32 </ b> B itself is difficult to visually recognize, it is possible to prevent a decrease in design. Here, "at the time of normal use" refers to a situation where the flush toilet 10 is approached from the front and then sitting on the toilet seat for use.

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 W1. A width variation area 38h is formed in the left water conduit 38c so that the width dimension gradually increases toward the rear from the front and rear center line Lb. In the width change area 38h, when a position 38i that is twice the width W2 of the width W1 is a reference position 38i, the third water outlet 32C is formed rearward of the reference position 38i. If the third outlet 32C is formed at a position forward of the reference position 38i (for example, in the range Sd), it is necessary to secure a wall portion for guiding washing water to the third outlet 32C around that. The water passage from the periphery to the second outlet 32B is likely to be narrowed. On the other hand, if the third water outlet 32C is formed behind the reference position 38i, the wall portion for guiding the washing water to the third water outlet 32C makes it difficult for the water passage toward the second water outlet 32B to become narrow. , It becomes easy to supply a sufficient amount of washing water to the second outlet 32B.

  Although the present invention has been described above based on the embodiment, the embodiment only shows the principle and application of the present invention. In addition, many modifications and changes in arrangement can be made to the embodiment without departing from the concept of the present invention defined in the claims.

  Although the flush toilet 10 has been described as an example using the wash-down type as the washing method, the inside of the toilet bowl 14 may be washed by the washing method combined with other methods such as the siphon type and the siphon jet type. Although the flush toilet 10 has been described as an example using a water supply direct pressure system as a water supply system, other than this, a gravity water supply system using a gravity, a flush valve system or other water supply system may be used. Although the toilet bowl body 12 has been described by taking a wall-mounted toilet bowl as an example, it may be a floor-standing toilet bowl installed on the floor surface of the toilet room. In addition to the pottery, the toilet body 12 may be made of resin or the like.

  Further, in the shelf portion 34 a of the rim water conduit 34, the slope of the upper surface portion connected to the upper end edge 26 a of the receiving surface portion 26 is gentler than the slope of the inner surface portion of the receiving surface portion 26 connected to the upper end edge 26 a of the receiving surface portion 26. It should just be formed. As long as such conditions are satisfied, the upper surface portion of the shelf 34a may be formed in a planar shape as shown in FIG. 1 or the like, or may be formed in an arc shape. Further, the rim water conduit 34 is formed in a curved surface shape in which the shape of the vertical cross section orthogonal to the swirling flow direction D is continuous by the upper surface portion of the shelf 34 a of the rim water conduit 34 and the lower surface portion of the overhang portion 34 c It may be done. Further, the rim channel 34 may not have the overhang portion 34c. Also, although the example in which the three rim conduits 34A to 34C are formed so as to be disconnected without being continuous with the other rim conduits at the end positions 34Aa, 34Ba, 34Ca has been described, the other rim conduits And so on.

  Further, from the viewpoint of obtaining the above-described function and effect (1), the three water discharge ports 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 contents of the embodiment.

FIG. 13 is a schematic view showing an example of the arrangement pattern of the water discharge ports 32A to 32C which can obtain the function and effect (1).
From the viewpoint of obtaining the effect (1), for example, as shown in FIG. 13A, the first water discharge port 32A is in the first divided area Sr1, and the second water discharge port 32B is in the second divided area Sr2. The third outlet 32C may be formed in the region Sr4. Further, as shown in FIG. 13B, the first water discharge port 32A is formed in the first divided area Sr1, the second water discharge port 32B is formed in the second divided area Sr2, and the third water discharge port 32C is formed in the third divided area Sr3. May be 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 outlet 32C is formed in the fourth divided region Sr4. May be As described above, the first water discharge port 32A having the largest washing 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 no spout is formed in one of the four divided areas Sr1 to Sr4, and spouts are individually formed in the other three divided areas.

  Further, the three water discharge ports 32A to 32C may be formed so that at least one is included in each of the three divided regions among the four divided regions Sr1 to Sr4, and straddles the adjacent divided regions. It may be formed as. For example, while the second water discharge port 32B is formed in the third divided area Sr3 and the third water discharge port 32C is formed in the fourth divided area Sr4, the first water discharge port 32A is crossed over the first divided area Sr1 and the second divided area Sr2. It may be formed to In addition to this, the second water discharge port 32B may be formed so as to straddle the adjacent divided area, or the third water discharge port 32C may be formed so as to straddle the adjacent divided area Good. Further, from the viewpoint of obtaining the above-described action and effect (1), the three water discharge ports 32A to 32C are arranged such that an angle range of 1/4 or more turns apart as viewed 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 flush water discharge amounts of the three spouts 32A to 32C may be the same, or only the flush water discharge amounts of the two spouts among the three spouts 32A to 32C may be the same.

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

FIG. 14 is a schematic view showing an example of the arrangement pattern of the water discharge ports 32A and 32B which can obtain the function and 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 area Sr1, and the second water discharge port 32B is formed in the third divided area Sr3. It is also good. Further, as shown in FIG. 14B, the first water discharge port 32A may be formed in the second divided area Sr2, and the second water discharge port 32B may be formed in the third divided area 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.

  Moreover, the example in which each water spout 32A-32C of the rim part 28 of the toilet bowl part 14 is arrange | positioned so that a position may overlap in an up-down direction was demonstrated. In addition, in each of the spouts 32A to 32C of the rim portion 28, any one or all the spouts 32A to 32C of the spouts 32A to 32C do not overlap in the vertical direction, It may be arranged at a position shifted in the vertical direction. In this case, the longitudinal center line Lb of the toilet bowl portion 14 bisects the longitudinal dimension of the inner surface portion of the toilet bowl portion 14 along the left-right direction in plan view of the horizontal cross section passing the lowermost water outlet. It is defined by an extending straight line.

  In addition, as described above, the water discharger 36 combines the wash water discharged from the first water discharge port 32A and the wash water discharged from the second water discharge port 32B and combines 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 mainstream Fw by adjusting at least one of the positions of the water discharge ports 32A and 32B, the flush water discharge amount, and the flush water discharge direction.

  Also, an example has been described in which the timing at which the first spout 32A and the third spout 32C start spouting washing water (hereinafter referred to as spout start timing) is equivalent. The spout start timing may be earlier than the spout start timing of the flush water of the second spout 32B, and the spout start timing may be shifted between the first spout 32A and the third spout 32C.

  Moreover, in order to adjust the flush water discharge amount of each water discharge port 32A-32C, the water discharge part 36 demonstrated the example which adjusts the passage cross-sectional area of the water flow path corresponding to the water discharge port 32A-32C. In addition to this, the flush water discharge amount may be adjusted by a throttling valve or the like provided in the middle of the water flow path to each of the water discharge ports 32A to 32C. Moreover, you may use valve mechanisms, such as an electrically driven valve, in order to adjust the timing which starts discharge of the wash water of each water spout 32A-32C.

DESCRIPTION OF SYMBOLS 10 ... flush toilet bowl, 12 ... toilet bowl main body, 14 ... toilet bowl part, 16 ... inlet, 20 ... drainage passage part, 26 ... receiving surface part, 28 ... rim part, 28L ... left side part, 28R ... right side part, 32A 1st outlet, 32B: 2nd outlet, 32C: 3rd outlet, 36: outlet, 38b: right channel (first channel) 38c: left channel (second channel), Sr1 to Sr4 ... divided area, La ... left and right center line, Lb ... front and back center line.

Claims (9)

It has a toilet bowl body having a toilet bowl and a water discharger for discharging wash water into the bowl,
The toilet bowl portion has a receiving surface portion for receiving waste and a rim portion connected to an upper edge portion of the receiving surface portion,
The water discharger has three water discharge ports formed in the rim, and discharges washing water to one side in the circumferential direction along the inner peripheral surface of the rim from the three water discharge ports,
The toilet bowl section is divided by a left and right center line which bisects left and right dimensions of the outer surface part of the toilet bowl main body in plan view and a front and rear center line which bisects front and rear dimensions of the inner surface part of the toilet bowl part. Have four divided areas,
The three spouts are individually formed in each of the three divided regions among the four divided regions,
The water discharger is disposed on the back side of the rim, and has a hollow structured water supply portion for supplying washing water to the three water discharge outlets,
The rim portion includes a rim water channel having a shelf portion formed to extend to one side of the circumferential direction from each of the three water discharge ports ,
The three spouts include a first spout having a larger discharge amount of flush water than the other two spouts,
Among the four divided areas, the other two water discharge ports are not formed in the divided area adjacent to one side in the circumferential direction with respect to the divided area where the first water discharge port is formed. Flush toilet bowl. It has a toilet bowl body having a toilet bowl and a water discharger for discharging wash water into the bowl,
The toilet bowl portion has a receiving surface portion for receiving waste and a rim portion connected to an upper edge portion of the receiving surface portion,
The water discharger has three water discharge ports formed in the rim, and discharges washing water to one side in the circumferential direction along the inner peripheral surface of the rim from the three water discharge ports,
The toilet bowl section is divided by a left and right center line which bisects left and right dimensions of the outer surface part of the toilet bowl main body in plan view and a front and rear center line which bisects front and rear dimensions of the inner surface part of the toilet bowl part. Have four divided areas,
The three spouts are individually formed in each of the three divided regions among the four divided regions,
The rim portion has three rim water conduits formed so as to extend from each of the three water discharge ports to one side in the circumferential direction,
In the water discharger, the magnitude relationship of the washing water discharge amount of each of the three spouts is the same as the magnitude relationship of the inner circumferential length of the three rim water conduits connected to each of the three spouts. A flush toilet characterized by comprising. The flush toilet according to claim 2 , wherein the three spouts include a first spout having a larger discharge amount of flush water than the other two spouts. The flush toilet according to claim 1 or 3, wherein the first water discharge port is provided in a rear divided area of the four divided areas. Among the four divided areas, the other two water discharge ports are not formed in the divided area adjacent to one side in the circumferential direction with respect to the divided area where the first water discharge port is formed. The flush toilet according to claim 3 .   The water spouting unit is characterized in that the magnitude relationship between the washing water discharge amount of each of the three spouts and the magnitude relationship between the opening areas of the three spouts are the same. The flush toilet according to any one of claims 1 to 5.   The three water discharge ports are formed individually in each of a divided area on one side in the circumferential direction of the two front divided areas and a divided area on two rear sides. The flush toilet according to any one of claims 1 to 6. One of the three spouts is formed in a divided area on one side in the circumferential direction of the two front divided areas,
The water discharger has a water passage for supplying washing water to the one water discharge port,
The water passage is formed to extend along the front and rear direction on the back side of the side portion on the side where the divided region on the one side of the circumferential direction among the side portions on the left and right sides of the rim portion The flush toilet according to any one of claims 1 to 7, characterized in that At the downstream end of the water flow passage, there is formed a turnback portion for flowing wash water supplied from the upstream side so as to lead it back to the one outlet.
The one water discharge port is partially formed by two radially adjacent walls of the toilet bowl,
The flush toilet according to claim 8, wherein circumferential end portions of the two wall portions are arranged on an imaginary line extending from a center point of the toilet bowl portion.

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