Water-washable toilet
The flush toilet design addresses unstable cleaning by using inclined shelf surfaces and strategic rim outlets to evenly distribute water flows, ensuring consistent cleaning across the waste receiving surface despite water tank fluctuations.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TOTO LTD
- Filing Date
- 2024-12-25
- Publication Date
- 2026-07-07
Smart Images
Figure 2026113108000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a flushing toilet, and more particularly to a flushing toilet that discharges dirt by washing with washing water.
Background Art
[0002] Conventionally, as described in Patent Documents 1 and 2 for example, there is provided a flushing toilet having a washing water tank for storing washing water, a bowl portion including a dirt receiving surface, a rim portion formed above the dirt receiving surface, a shelf surface formed between the dirt receiving surface and the rim portion, and a tub portion formed below the dirt receiving surface, and first and second rim water discharge ports for discharging washing water onto the shelf surface to form a swirling flow.
[0003] In the flushing toilets described in Patent Documents 1 and 2, the shelf surface is formed horizontally, and the washing water discharged from the first and second rim water discharge ports flows down onto the dirt receiving surface while swirling on the shelf surface. Further, in the front region of the dirt receiving surface, a recess that is recessed downward is formed, and the washing water flowing on the dirt receiving surface is collected in the recess and configured to flow toward the tub portion.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Patent Document 2
Summary of the Invention
Problems to be Solved by the Invention
[0005] However, in the flush toilets described in Patent Documents 1 and 2 mentioned above, there is a problem that if, for example, the amount of flushing water stored in the flushing water tank is changed or the flushing water tank is replaced, the flow rate of the flushing water discharged from the first rim outlet and the second rim outlet changes, resulting in unwashed areas on the waste receiving surface.
[0006] Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a flush toilet that can stably clean the waste receiving surface even if, for example, the amount of flushing water stored in the flushing water tank is changed. [Means for solving the problem]
[0007] To achieve the above objective, the present invention provides a flush toilet that washes with flushing water and discharges waste, comprising: a bowl portion having a waste receiving surface for receiving waste, a rim portion formed above the waste receiving surface, a shelf surface formed between the waste receiving surface and the rim portion, and a pot portion formed below the waste receiving surface with a water reservoir surface formed inside; a drain trap pipe connected below the bowl portion for discharging waste; a first rim outlet provided in the rim portion that discharges flushing water forward to form a swirling flow; and a second rim outlet provided in the rim portion that discharges flushing water backward to form a swirling flow that swirls in the same direction as the flushing water discharged from the first rim outlet, wherein the shelf surface is formed to slope downward from the first rim outlet toward the front end of the bowl portion, and then slope upward toward the rear from the front end of the bowl portion.
[0008] With the present invention configured in this way, the shelf surface is formed to incline downward from the first rim outlet toward the front end of the bowl portion, and then incline upward toward the rear from the front end of the bowl portion. As a result, the cleaning water discharged from the first rim outlet and swirling around the shelf surface flows down to the front region of the waste receiving surface and also flows down to the lateral region of the waste receiving surface, and the cleaning water discharged from the second rim outlet and swirling around the shelf surface flows down to the rear region of the waste receiving surface. This allows the entire waste receiving surface to be cleaned evenly, so that the waste receiving surface can be cleaned stably even if, for example, the amount of cleaning water stored in the cleaning water tank is changed.
[0009] In the present invention, preferably, the shelf surface is formed to incline upward toward the rear from the front end of the bowl portion, and then extend substantially horizontally. In the present invention configured in this way, the shelf surface is formed to incline upward from the front end of the bowl towards the rear, and then extend substantially horizontally. This allows the washing water, which has flowed on the shelf surface and whose flow velocity has decreased, to be carried on the substantially horizontal shelf surface and reach the rear area of the waste receiving surface.
[0010] Furthermore, in the present invention, preferably, a recess is formed in the front region of the waste receiving surface located in front of the pot portion, extending from the front end of the bowl portion toward the pot portion, and the width of this recess in the left-right direction is formed to decrease toward the rear. In the present invention configured as described above, a recess is formed in the front region of the waste receiving surface located in front of the pot portion, extending from the front end of the bowl portion toward the pot portion. The width of this recess in the left-right direction is formed to decrease toward the rear, so that the washing water flowing on the waste receiving surface can be collected in the recess and flow toward the pot portion.
[0011] In the present invention, preferably, the width of the shelf surface is formed to be smallest at the front end of the bowl portion. In the present invention configured in this way, the width of the shelf surface is formed to be smallest at the front end of the bowl portion, so that the washing water swirling on the shelf surface can flow down to the front area of the waste receiving surface.
[0012] Furthermore, in the present invention, preferably, the width of the shelf surface is formed to gradually increase toward the rear. In the present invention configured in this way, the width of the shelf surface is formed to gradually increase toward the rear, so that the washing water flowing on the shelf surface can be directed downwards into the lateral region of the waste receiving surface.
[0013] In the present invention, preferably, the width of the shelf surface is formed to be substantially constant in the lateral region of the bowl portion. In the present invention configured in this way, the width of the shelf surface is formed to be substantially constant in the lateral region of the bowl portion, so that the washing water flowing on the shelf surface can reach the rear region of the waste receiving surface.
[0014] Furthermore, in the present invention, preferably, a first main stream is formed by the washing water discharged from the first rim outlet, flowing through the front region of the waste receiving surface, and a third main stream is formed by the washing water discharged from the second rim outlet, flowing through the rear region of the waste receiving surface. In the present invention configured as described above, the cleaning water discharged from the first rim outlet forms a first main stream that flows through the front region of the waste receiving surface, and a third main stream that flows through the lateral region of the waste receiving surface. The cleaning water discharged from the second rim outlet forms a second main stream that flows through the rear region of the waste receiving surface. As a result, the entire waste receiving surface can be thoroughly cleaned by the first, second, and third main streams. [Effects of the Invention]
[0015] According to the flush toilet of the present invention, even if the amount of flushing water stored in the flushing water tank is changed, for example, the waste receiving surface can be stably cleaned.
Brief Description of the Drawings
[0016] [Figure 1] It is a plan view of a water-washing toilet according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view taken along line II-II of FIG. 1. [Figure 3] It is a cross-sectional view taken along line III-III of FIG. 2. [Figure 4] It is a cross-sectional view taken along line IV-IV of FIG. 3. [Figure 5] It is a cross-sectional view taken along line V-V of FIG. 3. [Figure 6] It is a cross-sectional view taken along line VI-VI of FIG. 3. [Figure 7] It is a cross-sectional view taken along line VII-VII of FIG. 3. [Figure 8] It is a cross-sectional view taken along line VIII-VIII of FIG. 3. [Figure 9] It is a cross-sectional view taken along line IX-IX of FIG. 3. [Figure 10] It is a cross-sectional view taken along line X-X of FIG. 3. [Figure 11] It is a cross-sectional view taken along line XI-XI of FIG. 3. [Figure 12] It is a plan view showing the flow state of washing water in the water-washing toilet according to an embodiment of the present invention.
Modes for Carrying Out the Invention
[0017] Hereinafter, with reference to the drawings, a water-washing toilet according to an embodiment of the present invention will be described. First, referring to FIGS. 1 to 3, the overall structure of the water-washing toilet according to the present embodiment will be described. FIG. 1 is a plan view of the water-washing toilet according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2. In this specification, when a user is viewing a flush toilet from the front, the front of the toilet is referred to as "front," the back as "rear," the right side as "right," and the left side as "left."
[0018] As shown in Figures 1 and 2, the flush toilet 1 comprises a ceramic toilet bowl 2, a bidet device (not shown) positioned on the upper surface of the toilet bowl 2, and a flush water tank (not shown) for storing flush water to be supplied to the toilet bowl 2. The flush water tank is positioned within the wall W and is configured to supply flush water to the toilet bowl 2 by gravity. In this embodiment, the flush water in the flush water tank is supplied to the toilet bowl 2, but flush water may also be supplied to the toilet bowl 2 from a water pipe via a flush valve, or the flush water in the flush water tank may be supplied to the toilet bowl 2 via a pump or the like.
[0019] The flush toilet 1 is a floor-standing flush toilet installed on the floor surface FL with the rear end of the toilet bowl body 2 in contact with the wall surface W. The flush toilet 1 is a wash-down type toilet that washes away waste by the flowing water action caused by the difference in the height of the flushing water. In this embodiment, an example of applying the present invention to a wash-down type toilet is shown, but the present invention can also be applied to wall-mounted toilets, siphon toilets, or siphon jet toilets, etc.
[0020] The toilet body 2 is provided with a bowl section 4, a drain trap pipe 6 connected below the bowl section 4 for discharging waste, and a skirt section 7 that covers the bowl section 4 and the drain trap pipe 6 from the outside. The drain trap pipe 6 consists of an inlet 6a, an introduction pipe 6b descending from the inlet 6a, an ascending pipe 6c rising from the downstream end of the introduction pipe 6b, and a horizontal pipe 6d extending horizontally backward from the downstream end of the ascending pipe 6c, with the top section 6e located between the ascending pipe 6c and the horizontal pipe 6d. A drain socket 8 is connected to the downstream end of the horizontal pipe 6d of the drain trap pipe 6, and the drain socket 8 is connected to a drain pipe (not shown) installed on the floor surface FL.
[0021] The bowl portion 4 comprises a waste receiving surface 10 for receiving waste, a rim portion 12 formed above the waste receiving surface 10, a shelf surface 14 formed between the waste receiving surface 10 and the rim portion 12, and a pot portion 16 formed below the waste receiving surface 10, in which a water reservoir surface WL is formed inside.
[0022] The waste receiving surface 10 is formed in a bowl shape. The front region of the waste receiving surface 10 (the region in front of the pot portion 16) is formed in a concave shape that faces downwards. The lateral region (the region to the left or right of the pot portion 16) and the rear region (the region behind the pot portion 16) of the waste receiving surface 10 are formed in a convex shape that faces upwards.
[0023] Behind the toilet bowl body 2, there is a common water channel 18 extending forward from a connection port 17 that connects to the flushing water tank, a first rim water channel 20 branching off from the downstream end of the common water channel 18 and extending forward to the left, and a second rim water channel 22 branching off from the downstream end of the common water channel 18, extending forward to the right, then making a U-turn and extending to the rear left. A first rim outlet 24 is formed at the downstream end of the first rim water channel 20, and a second rim outlet 26 is formed at the downstream end of the second rim water channel 22. In a plan view, the first rim outlet 24 is located at the rear left of the bowl portion 4 and is configured to discharge flushing water forward. In a plan view, the second rim outlet 26 is located at the rear right of the bowl portion 4 and is configured to discharge flushing water backward.
[0024] The cleaning water supplied from the cleaning water tank to the common water channel 18 via the connection port 17 is divided into the first rim water channel 20 and the second rim water channel 22, and is discharged from the first rim outlet 24 toward the front of the bowl section 4, and from the second rim outlet 26 toward the rear left side of the bowl section 4. The ratio of the amount of cleaning water discharged from the first rim outlet 24 to the amount of cleaning water discharged from the second rim outlet 26 of the cleaning water supplied from the cleaning water tank is set to approximately 7:3. In other words, the flow rate of the cleaning water discharged from the first rim outlet 24 is greater than the flow rate of the cleaning water discharged from the second rim outlet 26. The cleaning water discharged from the first rim outlet 24 and the second rim outlet 26 swirls in the same direction (counterclockwise) over the inner circumferential surface 12a of the rim portion 12 and the shelf surface 14, ensuring that the entire waste receiving surface 10 is thoroughly cleaned.
[0025] The rim portion 12 is formed by an overhang shape in which its inner circumferential surface 12a extends approximately vertically upward and then protrudes toward the internal space of the bowl portion 4. The rim portion 12 is formed in an overhang shape around almost the entire circumference of the bowl portion 4. The amount of overhang (the degree to which it protrudes toward the internal space of the bowl portion 4) is set to be larger in the front and lateral regions of the bowl portion 4, so that the large flow rate of flushing water discharged from the first rim outlet 24 does not splash out of the toilet bowl. In addition, the amount of overhang is set to be smaller in the rear region of the bowl portion 4, so that it can be easily cleaned.
[0026] The shelf surface 14 is provided around the entire circumference of the bowl portion 4. The shelf surface 14 has a predetermined width and is formed to be substantially horizontal in the width direction. This allows the washing water discharged from the first rim outlet 24 and the second rim outlet 26 to be carried on the shelf surface 14 and swirl around. Here, the shelf surface in this invention is not limited to being perfectly horizontal, but includes those that are inclined to the extent that the washing water can be carried on and swirl around. The shelf surface 14 is formed to be more horizontal than the waste receiving surface 10, and an inflection point is formed between the shelf surface 14 and the waste receiving surface 10.
[0027] The pot portion 16 is formed behind the center of the bowl portion 4 in the front-to-back direction. In plan view, the pot portion 16 is formed in a roughly triangular shape, and a roughly triangular water surface WL is formed inside the pot portion 16. The side walls 16a of the pot portion 16 are formed roughly vertically. The front side wall 16a of the pot portion 16 is bent at roughly a right angle to the waste receiving surface 10 and connected thereto. The rear, right, and left side walls 16a of the pot portion 16 are smoothly and continuously connected to the waste receiving surface 10. The bottom wall 16b of the pot portion 16 is slightly inclined downward toward the inlet 6a of the drain trap pipe 6.
[0028] Next, the bowl portion 4 of the flush toilet 1 according to this embodiment will be described in detail with reference to Figures 3 to 11. Figures 4 to 11 are cross-sectional views taken along the lines IV-IV to XI-XI in Figure 3.
[0029] As shown in Figure 4, the shelf surface 14 (left shelf surface 14a) from the first rim outlet 24 to the front end of the bowl section 4 is formed to gradually slope downward from the first rim outlet 24 towards the front end of the bowl section 4. The left shelf surface 14a is set to an angle of inclination of approximately 15 degrees with respect to the horizontal direction. As a result, the washing water flowing over the left shelf surface 14a flows toward the front end of the bowl section 4 while increasing its flow velocity.
[0030] As shown in Figures 3 and 6 to 11, the width of the left shelf surface 14a is formed to be approximately constant in the left lateral region A of the bowl section 4, and this width is set to be greater than the width of the first rim outlet 24. As a result, most of the washing water discharged from the first rim outlet 24 flows over the left shelf surface 14a without flowing down onto the waste receiving surface 10. Furthermore, the width of the left shelf surface 14a is formed to gradually decrease toward the front in the left front region B of the bowl section 4, and is smallest at the front end of the bowl section 4. As a result, the washing water flowing over the left shelf surface 14a swirls as it flows down into the front region of the waste receiving surface 10.
[0031] As shown in Figure 5, the shelf surface 14 (right shelf surface 14b) from the front end of the bowl section 4 to the second rim outlet 26 is formed to gradually slope upward from the front end of the bowl section 4 toward the rear (see part a in Figure 5). The right shelf surface 14b (part a in Figure 5) is set to an angle of inclination of approximately 15 degrees with respect to the horizontal. As a result, the washing water flowing over the right shelf surface 14b flows toward the rear while its flow velocity is reduced, and flows down into the lateral area of the waste receiving surface 10. Furthermore, the downstream end of the upward-sloping portion of the right shelf surface 14b (the downstream end of part a in Figure 5) is located at approximately the same position as the first rim outlet 24 in the front-rear direction of the bowl section 4 (near the rear side wall 16a of the pot section 16). In addition, the right shelf surface 14b is formed to extend approximately horizontally after sloping upward toward the rear (see part b in Figure 5). As a result, the washing water, whose flow rate has decreased, travels onto the nearly horizontal right-side shelf surface 14b and reaches the rear area of the waste receiving surface 10.
[0032] As shown in Figures 3 and 6 to 11, the width of the right shelf surface 14b is formed to gradually increase toward the rear in the right front region C of the bowl section 4. This allows the washing water flowing over the right shelf surface 14b to flow downwards onto the waste receiving surface 10 and also spread across the lateral region of the waste receiving surface 10 by resting on the right shelf surface 14b. Furthermore, the width of the right shelf surface 14b is formed to be approximately constant in the right lateral region D of the bowl section 4. This allows the washing water flowing over the right shelf surface 14b to flow downwards onto the waste receiving surface 10 and also spread across the rear region of the waste receiving surface 10 by resting on the right shelf surface 14b.
[0033] As shown in Figures 3 and 6 to 8, a recess 30 that curves downward is formed in the front region of the waste receiving surface 10. The recess 30 extends linearly from the front end of the bowl portion 4 toward the rear pot portion 16 (see Figure 3). This allows the washing water flowing over the waste receiving surface 10 to be collected in the recess 30 and flow toward the pot portion 16. The width of the recess 30 in the left-right direction is formed to be largest at the front end of the bowl portion 4 and gradually decreases toward the rear, forming an inverted fan shape (see Figure 3). This allows a large amount of washing water to be collected in the recess 30. The depth of the recess 30 is formed to be shallowest at the front end of the bowl portion 4 and gradually increases toward the rear. In other words, the bottom surface of the recess 30 is formed to slope downward toward the pot portion 16. This allows the washing water collected in the recess 30 to flow vigorously toward the pot portion 16.
[0034] Next, Figure 12 illustrates the flow of flushing water in a flush toilet according to an embodiment of the present invention. Figure 12 is a plan view showing the flow of flushing water in a flush toilet according to an embodiment of the present invention. In Figure 12, the first to third main streams are indicated by F1 to F3.
[0035] First, as shown in Figure 12, the cleaning water discharged from the first rim outlet 24 flows forward on the left shelf surface 14a. Because the left shelf surface 14a is formed to slope downward from the first rim outlet 24 towards the front end of the bowl section 4, the cleaning water flows towards the front end of the bowl section 4 while increasing its flow velocity.
[0036] Furthermore, the washing water discharged from the first rim outlet 24 flows over the left shelf surface 14a in the left lateral region A of the bowl section 4, because the width of the left shelf surface 14a is larger than the width of the first rim outlet 24 and is approximately constant. As a result, most of the washing water flows over the left shelf surface 14a without flowing down to the waste receiving surface 10. Subsequently, the washing water flowing over the left shelf surface 14a swirls as it flows down to the front region of the waste receiving surface 10 in the left front region B of the bowl section 4, because the width of the left shelf surface 14a is formed to decrease towards the front.
[0037] Furthermore, the washing water that flows down to the front region of the waste receiving surface 10 flows through the front region of the waste receiving surface 10 and flows into the recess 30 formed in the front region of the waste receiving surface 10. Because the recess 30 is formed in an inverted fan shape, a large amount of washing water flowing on the waste receiving surface 10 is collected in the recess 30. The washing water collected in the recess 30 forms a first main flow (a bundled flow) F1 that flows toward the pot portion 16. Because the bottom surface of the recess 30 is formed to slope toward the pot portion 16, the first main flow F1 flows vigorously toward the pot portion 16 and flows into the pot portion 16 from the front.
[0038] Next, the washing water that has passed the front end of the bowl section 4 flows backward along the right shelf surface 14b. As the washing water flows backward along the right shelf surface 14b, its flow velocity decreases because the right shelf surface 14b is formed to slope upward from the front end of the bowl section 4 toward the rear. Furthermore, as the washing water flows along the right shelf surface 14b, its width gradually increases toward the rear and then remains approximately constant, so it is guided to the rear region of the waste receiving surface 10. The washing water that has flowed down to the lateral region of the waste receiving surface 10 flows along the lateral region of the waste receiving surface 10 and forms a third main flow (a bundled flow) F3 that flows toward the pot section 16. The third main flow F3 flows into the pot section 16 from the side.
[0039] Furthermore, since the right shelf surface 14b is formed to extend almost horizontally after the right shelf surface 14b has tilted upward toward the rear, the washing water that flows over the right shelf surface 14b reaches the rear area of the waste receiving surface 10.
[0040] Next, the cleaning water discharged from the second rim outlet 26 flows along the rear shelf surface 14c towards the left rear. Because the width of the rear shelf surface 14c is relatively small, most of the cleaning water flows down to the rear region of the waste receiving surface 10 and flows along the rear region of the waste receiving surface 10. The cleaning water flowing along the rear region of the waste receiving surface 10 forms a second main stream (a bundled flow) F2 that flows towards the pot section 16. The second main stream F2 flows into the pot section 16 from the rear.
[0041] In this way, the first main flow F1 flows through the front region of the waste receiving surface 10, the third main flow F3 flows through the lateral region of the waste receiving surface 10, and the second main flow F2 flows through the rear region of the waste receiving surface 10, so that the entire waste receiving surface 10 is thoroughly cleaned.
[0042] Next, the effects and advantages of the flush toilet 1 according to this embodiment described above will be explained. First, in the flush toilet 1 according to this embodiment, the left shelf surface 14a is inclined downward from the first rim outlet 24 toward the front end of the bowl portion 4, and then the right shelf surface 14b is formed to be inclined upward toward the rear from the front end of the bowl portion 4. As a result, the flushing water discharged from the first rim outlet 24 and swirling around the left shelf surface 14a flows down to the front area of the waste receiving surface 10 and also flows down to the lateral area of the waste receiving surface 10, and the flushing water discharged from the second rim outlet 26 and swirling around the shelf surface 14 flows down to the rear area of the waste receiving surface 10. This allows the entire waste receiving surface 10 to be cleaned evenly, so that even if the amount of flushing water stored in the flushing water tank is changed, the waste receiving surface 10 can be cleaned stably.
[0043] In the flush toilet 1 according to this embodiment, the right shelf surface 14b is formed to incline upward toward the rear from the front end of the bowl portion 4 and then extend substantially horizontally. This allows the flushing water, whose flow velocity has decreased after flowing along the right shelf surface 14b, to be carried onto the substantially horizontal right shelf surface 14b and reach the rear area of the waste receiving surface 10.
[0044] Furthermore, in the flush toilet 1 according to this embodiment, a recess 30 is formed in the front region of the waste receiving surface 10, which is located in front of the bowl portion 16, extending from the front end of the bowl portion 4 toward the bowl portion 16. The width of this recess 30 in the left-right direction is formed to decrease toward the rear, so that the flushing water flowing on the waste receiving surface 10 can be collected in the recess 30 and flow toward the bowl portion 16.
[0045] In the flush toilet 1 according to this embodiment, the width of the shelf surface 14 is formed to be smallest at the front end of the bowl portion 4, so that the flushing water swirling on the shelf surface 14 can flow down to the front area of the waste receiving surface 10.
[0046] Furthermore, in the flush toilet 1 according to this embodiment, the width of the right shelf surface 14b is formed to gradually increase toward the rear, so that the flushing water flowing on the right shelf surface 14b can be directed downwards into the lateral area of the waste receiving surface.
[0047] In the flush toilet 1 according to this embodiment, the width of the right shelf surface 14b is formed to be substantially constant in the lateral region of the bowl portion 4, so that the flushing water flowing on the right shelf surface 14b can reach the rear region of the waste receiving surface 10.
[0048] Furthermore, in the flush toilet 1 according to this embodiment, the flushing water discharged from the first rim outlet 24 forms a first main stream F1 that flows through the front region of the waste receiving surface 10, and a third main stream F3 that flows through the lateral region of the waste receiving surface 10, and the flushing water discharged from the second rim outlet 26 forms a second main stream F2 that flows through the rear region of the waste receiving surface 10. As a result, the entire waste receiving surface 10 can be thoroughly cleaned by the first main stream F1, the second main stream F2, and the third main stream F3.
[0049] The present invention is not limited to the embodiments described above, and various modifications and variations are possible within the scope of the technical idea described in the claims. [Explanation of symbols]
[0050] 1: Flush toilet 4: Bowl section 6: Drain trap pipe 10: Waste receiving surface 12: Rim section 12a: Inner circumferential surface of the rim 14:Shelf surface 14a: Left side shelf 14b:Right side shelf 14c: Rear shelf surface 16: Acupressure points 16a: Side wall of the acupoint 16b: Bottom wall of the acupoint 24: First rim outlet 26: Second rim outlet 30: Recess F1: 1st mainstream F2: 2nd mainstream F3: 3rd mainstream
Claims
1. A flush toilet that uses flushing water to wash away waste, A bowl portion comprising a waste receiving surface for receiving waste, a rim portion formed above the waste receiving surface, a shelf surface formed between the waste receiving surface and the rim portion, and a pot portion formed below the waste receiving surface with a water reservoir inside, A drain trap pipe is connected below this bowl section for discharging waste, A first rim outlet is provided on the rim portion and discharges cleaning water forward to form a swirling flow, A second rim outlet is provided on the rim portion and discharges cleaning water toward the rear, forming a swirling flow that swirls in the same direction as the cleaning water discharged from the first rim outlet, It has, A flush toilet, characterized in that the shelf surface is formed to slope downward from the first rim spout toward the front end of the bowl, and then slope upward toward the rear from the front end of the bowl.
2. The flush toilet according to claim 1, wherein the shelf surface is formed to incline upward toward the rear from the front end of the bowl portion and then extend substantially horizontally.
3. A flush toilet according to claim 1 or 2, wherein a recess is formed in the front region of the waste receiving surface located in front of the above-mentioned pot portion, extending from the front end of the bowl portion toward the above-mentioned pot portion, and the width of this recess in the left-right direction is formed to decrease toward the rear.
4. The flush toilet according to claim 1, wherein the width of the shelf surface is formed to be smallest at the front end of the bowl portion.
5. The flush toilet according to claim 4, wherein the width of the shelf surface is formed to gradually increase toward the rear.
6. The flush toilet according to claim 4 or 5, wherein the width of the shelf surface is formed to be substantially constant in the lateral region of the bowl portion.
7. The flush toilet according to claim 1, configured such that the flushing water discharged from the first rim outlet forms a first main flow through the front region of the waste receiving surface and a third main flow through the lateral region of the waste receiving surface, and the flushing water discharged from the second rim outlet forms a second main flow through the rear region of the waste receiving surface.