Water closet

Abstract

To provide a water closet capable of improving dirt draining performance and actualizing sufficient washing of a dirt receiving surface even when a reserved water surface is formed larger.SOLUTION: The water closet includes a bowl section 6 including a dirt receiving surface 14, a rim part 16, and a pot part 18, a first water discharge port 20 provided on the left side of the bowl section 6 for discharging washing water along the rim part 16, a second water discharge port 22 provided on the right side of the bowl section 6 for discharging washing water to the rear side region of the bowl section 6, and a drainage line 10 connected to the bottom of the bowl section 6. The dirt receiving surface 14, and an inner peripheral face 16a of the rim part 16 are connected via a connection part 30. In the rear side region of the bowl section 6, the connection part 30 has an upward inclination part 32 inclining upward in the flowing direction of the washing water which turns along the rim part 16, and a downward inclination part 36 located on the downstream side of the upward inclination part 32 and inclining downward in the flowing direction of the washing water.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that expels waste using flush water supplied from a flush water source. [Background technology]

[0002] Conventionally, as described in Patent Document 1, for example, flush toilets have been known which include a waste receiving surface for receiving waste, a rim portion formed above the waste receiving surface, a basin portion formed below the waste receiving surface within which a water collection surface is formed, and first and second water outlets provided in the rim portion and which form a swirling flow. In this type of flush toilet, the first water outlet is provided in front of the bowl portion, and the second water outlet is provided in the rear of the bowl portion. Some of the flush water discharged from the second water outlet flows directly into the water surface in the basin portion, and after colliding with the bottom wall of the basin portion, forms a flow that swirls vertically within the basin portion. This pushes waste into the drainage pipe and is discharged. Meanwhile, the remaining flush water discharged from the second water outlet swirls along the rim portion and flows down the waste receiving surface. This washes away waste adhering to the waste receiving surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-71009 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in such flush toilets, it is conceivable to reduce the area of ​​the waste receiving surface, which is the drying surface, and to suppress the adhesion of waste, by making the water collecting surface larger than before. However, in a flush toilet such as that described in Patent Document 1 mentioned above, when the pooled water surface is made larger than before, the vertically swirling flow within the basin is dispersed, so even if flush water is made to flow directly from the second spout onto the pooled water surface in the basin, a vertically swirling flow sufficient to expel waste cannot be formed. This creates the problem that waste, particularly floating waste that floats on the surface of the pooled water surface, cannot be sufficiently expelled. On the other hand, if the flow rate of the cleaning water flowing directly from the second outlet onto the water surface in the basin section is increased, the momentum of the flow swirling vertically within the basin section can be strengthened, but this reduces the amount of cleaning water swirling along the rim section, which creates the problem that the waste receiving surface cannot be sufficiently cleaned.

[0005] The present invention has been made to solve the above-mentioned problems, and has as its object to provide a flush toilet that can improve waste discharge performance and sufficiently clean the waste receiving surface, even if a large water pool surface is formed. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a flush toilet that discharges waste using flush water supplied from a flush water source, the flush toilet having a bowl-shaped waste receiving surface, a rim portion having an inner circumferential surface rising from the outer edge of the waste receiving surface, and a pot portion formed below the waste receiving surface within which a water storage surface is formed, a first water outlet provided in the rim portion on one left-right side of the bowl portion and spouting flush water along the inner circumferential surface of the rim portion to form a swirling flow, a second water outlet provided in the rim portion on the other left-right side of the bowl portion and spouting flush water in the same direction as the swirling direction of the flush water spouted from the first water outlet and toward a rear area of ​​the bowl portion, and a drainage pipeline connected to the bottom of the bowl portion, the waste receiving surface and the inner circumferential surface of the rim portion being connected by a connecting portion, the connecting portion comprising an upwardly sloping portion inclined upward in the direction of the flow of the flush water swirling along the rim portion, and a downwardly sloping portion located downstream of the upwardly sloping portion and inclined downward toward the flow direction of the flush water. In the present invention configured as described above, the waste receiving surface and the inner peripheral surface of the rim are connected by a connecting portion, and this connecting portion has an upwardly inclined portion inclined upward in the flow direction of the flush water swirling along the rim in the rear region of the bowl portion, and a downwardly inclined portion located downstream of this upwardly inclined portion inclined downward in the flow direction of the flush water, so that a part of the flush water discharged from the second water outlet flows down due to pressure loss by flowing along the upwardly inclined portion, and flows vigorously into the water surface of the pot portion to form a vertically swirling flow. This improves the discharge performance of the waste. On the other hand, the remaining flush water discharged from the second water outlet flows down the downwardly inclined portion, increasing its flow rate, and swirls vigorously along the rim. This allows the flush water to be distributed over the entire waste receiving surface. Therefore, even if the water pooling surface is formed large, the waste discharge performance can be improved and the waste receiving surface can be sufficiently cleaned.

[0007] In the present invention, the upwardly inclined portion preferably includes a concavely curved portion curved so as to be recessed downward, and the downwardly inclined portion preferably includes a convexly curved portion curved so as to protrude upward. In the present invention configured in this manner, the upwardly inclined portion has a concave curved portion that is curved so as to concave downward, and the downwardly inclined portion has a convex curved portion that is curved so as to protrude upward, so that some of the flushing water discharged from the second water outlet flows downward by flowing through the concave curved portion of the upwardly inclined portion, and the remaining flushing water flows through the convex curved portion of the downwardly inclined portion, thereby increasing the flow rate.

[0008] In the present invention, the upwardly inclined portion preferably includes a convexly curved portion that is located downstream of the concavely curved portion and curved so as to protrude upward. In the present invention configured in this manner, the upwardly inclined portion has a convexly curved portion that is located downstream of the concavely curved portion and is curved so as to protrude upward, so that a portion of the flushing water discharged from the second water outlet flows down due to pressure loss as it flows through the convexly curved portion of the upwardly inclined portion, and can flow into the water surface in the basin portion.

[0009] In the present invention, the horizontal portion formed substantially horizontally is provided between the upward inclined portion and the downward inclined portion. In the present invention configured in this manner, a horizontal section formed almost horizontally is provided between the upward inclined section and the downward inclined section, so that the cleaning water whose flow rate has decreased after passing through the upward inclined section can be carried onto the horizontal section and swirled.

[0010] In the present invention, the horizontal portion is preferably provided on one left-right side of the bowl portion opposite the second water outlet. In the present invention configured in this manner, the horizontal portion is provided on one of the left-right sides of the bowl portion opposite the second water outlet, so that the flushing water, whose flow rate has decreased as it flows through the bowl portion opposite the second water outlet, can be carried by the horizontal portion and swirled.

[0011] In the present invention, the height of the waste receiving surface is preferably lower on one side in the left-right direction of the bowl portion than on the other side in the rear region of the bowl portion. In the present invention configured in this manner, the height of the waste receiving surface is lower on one side of the bowl portion in the left-right direction than on the other side in the rear region of the bowl portion, so that some of the flushing water discharged from the second outlet flows down from the lowered waste receiving surface and into the water collection surface of the basin portion.

[0012] In the present invention, the upwardly inclined portion is preferably located in the vicinity of the second water outlet. In the present invention configured in this manner, the upwardly inclined portion is located in the vicinity of the second water outlet, so that a portion of the flushing water discharged from the second water outlet flows down early, allowing a vertical swirling flow to be formed early within the basin portion. Effect of the Invention

[0013] According to the flush toilet of the present invention, it is possible to provide a flush toilet that can improve waste discharge performance and can adequately clean the waste receiving surface, even if the pooling surface is formed large. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a side cross-sectional view of a flush toilet according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4A] FIG. 3 is a cross-sectional view taken along line IVA-IVA in FIG. 2. [Figure 4B] FIG. 4 is a cross-sectional view taken along line IVB-IVB in FIG. 2. [Diagram 5] 1 is a diagram showing a schematic diagram of the flow of flush water within a bowl portion during toilet flushing in a flush toilet according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Below, a flush toilet 1 according to an embodiment of the present invention will be explained. First, the basic structure of the flush toilet 1 will be explained with reference to Figures 1 and 2. Figure 1 is a side cross-sectional view of a flush toilet according to an embodiment of the present invention, and Figure 2 is a plan view of a flush toilet according to an embodiment of the present invention.

[0016] As shown in Figures 1 and 2, the flush toilet 1 is a wash-down toilet in which waste is washed away by the flowing water caused by the difference in height of the water inside the bowl. The flush toilet 1 comprises a ceramic toilet body 2 and a water storage tank 4 which stores flushing water for cleaning the toilet body 2. The toilet body 2 comprises a bowl portion 6 on the front side, and a common water conduit 8 which communicates with the water storage tank 4 is formed in the upper rear part of the bowl portion 6. Furthermore, a drainage pipe 10 is formed in the lower rear part of the bowl portion 6 for discharging waste. In the embodiment of the present invention, a wash-down toilet will be described, but the present invention is not limited to this, and the flush toilet of the present invention also includes a siphon type toilet that discharges waste by siphon action.

[0017] In this specification, when a user looks at flush toilet 1 from the front, the front of flush toilet 1 will be described as the "front side", the back side as the "rear side", the right side as the "right side", the left side as the "left side", the front-to-back direction of flush toilet 1 will be described as the "front-to-front direction", the left-to-right direction will be described as the "left-to-right direction", and the up-down direction will be described as the "vertical direction".

[0018] The above-mentioned water tank 4 is equipped with a drain valve 12, and when the user opens an operating lever (not shown), the drain valve 12 opens and flush water in the water tank 4 is supplied to the toilet body 2. Furthermore, in the flush toilet of the present invention, other than the water storage tank 4, the source of flush water may be one that uses direct tap water pressure or a flush valve, and flush water may also be supplied using a pump.

[0019] The bowl section 6 is provided with a bowl-shaped waste receiving surface 14, a rim section 16 having an inner peripheral surface 16a that rises from the outer edge of the waste receiving surface 14 and is exposed to the outside, and a basin section 18 that is formed below the waste receiving surface 14 and forms a water pooling surface W therein. Here, the water pooling surface W of the basin section 18 is substantially triangular, measuring 160mm to 180mm in the front-to-back direction and 125mm to 145mm in the left-to-right direction when viewed from above, and is formed larger (enlarged) than the water pooling surface of a conventional wash-down toilet. The basin section 18 is also 200mm to 240mm in the front-to-back direction and 150mm to 190mm in the left-to-right direction when viewed from above, forming a substantially egg-shaped triangle (an elliptical shape tapered at the front) that is larger than the water pooling surface W.

[0020] The pot portion 18 has a bottom wall 18a and side walls 18b that extend upward from the bottom wall 18a and surround the water surface W on all four sides. The bottom wall 18a of the pot portion 18 has a recess 18c formed to be recessed downward, a front flat portion 18d that is a substantially flat surface formed in front of the recess 18c, side flat portions 18e that are substantially flat surfaces formed on both the left and right sides of the recess 18c, and a protruding portion 18f that is formed on the lower rear side of the pot portion 18 and protrudes forward.

[0021] A first water outlet 20 that spouts flush water is formed in the rim portion 16 of the bowl portion 6 at a position on the front left side of the bowl portion 6. A second water outlet 22 that spouts flush water is formed at a position on the rear right side of the bowl portion 6. The above-mentioned common water conduit 8 branches downstream into a first water conduit 24 and a second water conduit 26, the first water conduit 24 extending to the first water outlet 20, and the second water conduit 26 extending to the second water outlet 22, so that flush water is supplied from the water storage tank 4 to the first water outlet 20 and the second water outlet 22. Here, the first water outlet 20 spouts water toward the front region of the bowl portion 6, and the second water outlet 22 spouts water toward the rear region of the bowl portion 6. The first water outlet 20 and the second water outlet 22 spout flush water in a direction that forms a swirling flow that swirls in the same direction. In the case of the embodiment of the present invention, a counterclockwise swirling flow is formed. Also, in the embodiment of the present invention, of the amount of flush water supplied from the water storage tank 4 to the common water channel 8, the ratio of the amount of flush water spouted from the first water outlet 20 to the amount of flush water spouted from the second water outlet 22 is approximately 6:4, which is a greater amount of flush water spouted from the second water outlet 22 than in the past. Furthermore, the flush toilet of the present invention may have two or more water outlets (for example, three).

[0022] The drainage pipe 10 is provided with an inlet 10a connected to the bottom wall 18a of the pot portion 18, an introduction pipe 10b extending downward from the inlet 10a, an ascending pipe 10c extending upward from the introduction pipe 10b, a descending pipe 10d extending downward from the ascending pipe 10c, and a top portion 10e located between the descending pipe 10d and the ascending pipe 10c and defining the pooled water level. The introduction pipe 10b is connected to the bottom wall 18a of the pot portion 18 as a smooth, continuous curved surface, allowing the flush water flowing in from the inlet 10a to flow smoothly. Here, the lower end of the descending pipe 10d of the drain pipe 10 is connected to a drain pipe (not shown) via a drain socket (not shown).

[0023] Next, the connection portion that connects the waste receiving surface 14 and the inner circumferential surface 16a of the rim portion 16 of a flush toilet 1 according to an embodiment of the present invention will be described in detail with reference to Figures 1 to 3. Figure 3 is a cross-sectional view taken along line III-III in Figure 2.

[0024] As shown in FIG. 1, the outer edge of the waste receiving surface 14 and the inner peripheral surface 16a of the rim portion 16 are connected by a connection portion 30. The connection portion 30 constitutes the boundary between the waste receiving surface 14 and the inner peripheral surface 16a of the rim portion 16. The connection portion 30 is provided on almost the entire circumference of the bowl portion 6 when viewed from above (see FIG. 2). The connection portion 30 is bent vertically upward from the outer edge of the waste receiving surface 14. This allows the inner peripheral surface 16a of the rim portion 16 to rise almost vertically from the outer edge of the waste receiving surface 14.

[0025] As shown in Figure 3, the connection portion 30, in the rear region of the bowl portion 6, has an upwardly sloping portion 32 that slopes upward toward the flow direction of the cleaning water swirling along the rim portion 16, a horizontal portion 34 that extends approximately horizontally from the downstream end 32a of the upwardly sloping portion 32, and a downwardly sloping portion 36 that slopes downward from the downstream end 34a of the horizontal portion 34 toward the flow direction of the cleaning water swirling along the rim portion 16.

[0026] The upwardly inclined portion 32 is generally inclined upward in the direction of the flow of flush water. As flush water flows through the upwardly inclined portion 32, it experiences pressure loss and its flow rate decreases as it ascends the incline. As a result, some of the flush water discharged from the second water outlet 22 flows down to the waste receiving surface 14 and directly into the pooled water surface in the basin portion 18. The upstream end 32b of the upwardly inclined portion 32 is located near the second water outlet 22, in the second water conduit 26 upstream of the second water outlet 22. The downstream end 32a of the upwardly inclined portion 32 is located in the center of the bowl portion 6 in the left-right direction.

[0027] As shown in FIG. 3, the upwardly inclined portion 32 includes a concavely curved portion 32c that is curved so as to be concave downward, and a convexly curved portion 32d that is located downstream of the concavely curved portion 32c and curved so as to protrude upward. Since the concavely curved portion 32c is concave downward, the flush water flowing through the concavely curved portion 32c flows down from the concavely curved portion 32c to the waste receiving surface 14. Since the convexly curved portion 32d protrudes upward, the flush water flowing through the convexly curved portion 32d is subject to pressure loss, and the flow rate decreases, so that the flush water flows down to the waste receiving surface 14. In addition, the concavely curved portion 32c is provided at a position close to the second water outlet 22, and the convexly curved portion 32d is provided at a position far from the second water outlet 22.

[0028] The horizontal section 34 is located at the highest position in the connecting section 30, and is formed approximately horizontally. The upstream end 34b of the horizontal section 34 is located in the left-right center of the bowl section 6, and the downstream end 34a is located near the left side wall 18b of the pot section 18. The horizontal section 34 is provided on the left side of the bowl section 6, opposite the second water outlet 22. This allows flush water that has passed through the upwardly inclined section 32 and has a reduced flow rate to be placed on the horizontal section 34 and swirled along the rim section 16.

[0029] The downward slope portion 36 is generally inclined downward in the flow direction of the flush water. The flush water flowing through the downward slope portion 36 increases in flow rate as it descends the downward slope. This increases the flow rate of the flush water, whose flow rate has decreased after passing through the upward slope portion 32, and allows it to swirl along the rim portion 16. The upstream end 36a of the downward slope portion 36 is located near the left side wall 18b of the basin portion 18, and the downstream end 36b is located near the left end of the waste receiving surface 14.

[0030] Next, with reference to Figures 4A and 4B, the waste receiving surface 14 in the rear region of the bowl portion 6 of a flush toilet 1 according to an embodiment of the present invention will be described in detail. Figure 4A is a cross-sectional view taken along line IVA-IVA in Figure 2, and Figure 4B is a cross-sectional view taken along line IVB-IVB in Figure 2.

[0031] 4A and 4B, in the rear region of the bowl portion 6 (the region behind the basin portion 18 and in front of the rim portion 16), the height of the waste receiving surface 14 is asymmetrical. The waste receiving surface 14 is lower in the rear region 14b on the right side, where the second water outlet 22 is located, than in the rear region 14a on the left side. As a result, some of the flush water discharged from the second water discharge port 22 flows down from the relatively lower left rear area 14a and flows directly into the pooled water surface in the basin portion 18.

[0032] Next, the flow of flush water within the bowl portion 6 during toilet flushing in a flush toilet 1 according to an embodiment of the present invention will be explained with reference to Figure 5. Figure 5 is a diagram showing generally the flow of flush water within the bowl portion during toilet flushing in a flush toilet according to an embodiment of the present invention.

[0033] 5, first, part of the flush water discharged from the first water outlet 20 forms a flow f1 that swirls around the inner circumferential surface 16a of the rim portion 16, while the majority flows down to the waste receiving surface 14 to form a front main flow F1. After flowing through the front region of the waste receiving surface 14 of the bowl portion 6, the front main flow F1 reaches the rear region of the waste receiving surface 14 and flows into the basin portion 18. Meanwhile, part of the flush water discharged from the second water outlet 22 forms a flow f2 that swirls around the inner circumferential surface 16a of the rim portion 16, while the majority flows down to the waste receiving surface 14 to form a rear main flow F2. The rear main flow F2 flows through the rear region of the waste receiving surface 14 of the bowl portion 6, and then flows directly into the pool water surface W in the basin portion 18.

[0034] Next, part of the cleaning water that flows into the pot portion 18 collides with the front flat portion 18d, the side flat portion 18e, or the protruding portion 18f in the pot portion 18, and is changed into an upward flow, forming a powerful vertically swirling flow F3. As a result, the waste is stirred up and down together with the accumulated water in the pot portion 18 and is pushed into the inlet 10a of the drainage pipe 10. Further, part of the flushing water that flows into the pot portion 18 is collected in a recess 18c in the bottom wall 18a of the pot portion 18, and is pushed into the inlet 10a of the drainage pipe 10 along the recess 18c. This causes floating waste to be forcefully pushed into the drainage pipe 10.

[0035] The effects of the above-described embodiment will now be described. In the flush toilet 1 according to the embodiment of the present invention, the waste receiving surface 14 and the inner peripheral surface 16a of the rim portion 16 are connected by a connecting portion 30, and this connecting portion 30 is provided with an upwardly inclined portion 32 that slopes upward in the flow direction of the flush water swirling along the rim portion 16 in the rear region of the bowl portion 6, and a downwardly inclined portion 36 that is located downstream of this upwardly inclined portion 32 and slopes downward in the flow direction of the flush water, so that a portion of the flush water discharged from the second water outlet 22 flows down the upwardly inclined portion 32, undergoes pressure loss, and flows vigorously into the pooled water surface W of the basin portion 18, forming a vertically swirling flow F3. This can improve the discharge performance of waste. Meanwhile, the remaining flush water discharged from the second water outlet 22 flows through the downwardly inclined portion 36, increasing its flow rate, and swirls vigorously along the rim portion 16. This can allow the flush water to be distributed over the entire waste receiving surface 14. Therefore, even if the pooled water surface W is formed large, the waste discharge performance can be improved and the waste receiving surface 14 can be sufficiently cleaned.

[0036] Furthermore, in the flush toilet 1 according to an embodiment of the present invention, the upwardly inclined portion 32 has a concave curved portion 32c that is curved so as to recess downward, and the downwardly inclined portion 36 has a convex curved portion 32d that is curved so as to protrude upward, so that some of the flush water discharged from the second water outlet 22 flows downward by flowing through the concave curved portion 32c of the upwardly inclined portion 32, and the remaining flush water flows through the convex curved portion 32d of the downwardly inclined portion 36, thereby increasing the flow rate.

[0037] In the flush toilet 1 according to an embodiment of the present invention, the upwardly inclined portion 32 is provided with a convexly curved portion 32d that is located downstream of the concavely curved portion 32c and curved so as to protrude upward, so that a portion of the flush water discharged from the second water outlet 22 flows down through the convexly curved portion 32d of the upwardly inclined portion 32, undergoes pressure loss, and can flow into the pooled water surface W.

[0038] Furthermore, in the flush toilet 1 according to an embodiment of the present invention, a horizontal section 34 formed almost horizontally is provided between the upwardly inclined section 32 and the downwardly inclined section 36, so that the flush water whose flow rate has decreased after passing through the upwardly inclined section 32 can be carried onto the horizontal section 34 and swirled.

[0039] In a flush toilet 1 according to an embodiment of the present invention, the horizontal portion 34 is provided on one side (the left side) in the left-right direction of the bowl portion 6 opposite the second water outlet 22, so that the flush water, whose flow rate has decreased as it flows through the bowl portion 6 opposite the second water outlet 22, can be carried by the horizontal portion 34 and swirled.

[0040] Furthermore, in the flush toilet 1 according to an embodiment of the present invention, the height of the waste receiving surface 14 is lower on one side (right side) of the bowl portion 6 in the left-right direction than on the other side (left side) in the rear region of the bowl portion 6, so that some of the flush water discharged from the second outlet 22 can flow down from the lowered waste receiving surface 14 and into the water collection surface W of the basin portion 18.

[0041] In the flush toilet 1 according to an embodiment of the present invention, the upwardly inclined section 32 is located in the vicinity of the second water outlet 22, so that a portion of the flush water discharged from the second water outlet 22 flows down early, allowing a vertical swirling flow to be formed early within the basin section 18.

[0042] The present invention is not limited to the above-described embodiment, and various changes and modifications are possible within the scope of the technical idea described in the claims. [Explanation of symbols]

[0043] 1: Flush toilet 6: Bowl section 10: Drainage pipe 10a: Drain pipe inlet 14: Waste receiving surface 14a: Left rear area of ​​waste receiving surface 14b: Right rear area of ​​waste receiving surface 16: Rim section 16a: Inner surface of rim 18: Pressure point section 20: First outlet 22: Second outlet 30: Connection part 32: Uphill section 32c: Concave curve 32d: Convex curved section 34:Horizontal part 36: Downhill section F1: Front mainstream F2: Rear mainstream F3: Vertical swirl flow W: Reservoir surface

Claims

1. A flush toilet that discharges waste using flush water supplied from a flush water source, a bowl portion including a bowl-shaped waste receiving surface, a rim portion having an inner peripheral surface rising from an outer edge of the waste receiving surface, and a pot portion formed below the waste receiving surface and having a water collecting surface formed therein; A first water outlet provided in the rim portion on one side of the bowl portion in the left-right direction, the first water outlet outlet being configured to discharge flush water along an inner peripheral surface of the rim portion to form a swirling flow; a second water outlet provided on the rim portion on the other side of the bowl portion in the left-right direction, for ejecting flush water in the same direction as the swirling direction of flush water ejected from the first water outlet and toward a rear region of the bowl portion; a drainage pipe connected to the bottom of the bowl; having A flush toilet characterized in that the waste receiving surface and the inner peripheral surface of the rim portion are connected by a connecting portion, and this connecting portion comprises, in the rear region of the bowl portion, an upwardly sloping portion that slopes upward in the direction of the flow of flush water swirling along the rim portion, and a downwardly sloping portion that is located downstream of this upwardly sloping portion and slopes downward in the direction of the flow of flush water.

2. 2. The flush toilet according to claim 1, wherein the upwardly inclined portion comprises a concavely curved portion that is curved so as to recess downward, and the downwardly inclined portion comprises a convexly curved portion that is curved so as to protrude upward.

3. 3. The flush toilet according to claim 2, wherein the upwardly inclined portion is provided with a convexly curved portion that is positioned downstream of the concavely curved portion and curves so as to protrude upward.

4. 4. The flush toilet according to claim 1, wherein a horizontal section formed substantially horizontally is provided between the upwardly inclined section and the downwardly inclined section.

5. 5. The flush toilet according to claim 4, wherein the horizontal portion is provided on one side in the left-right direction of the bowl portion opposite the second water outlet.

6. 2. The flush toilet according to claim 1, wherein the height of the waste receiving surface is lower on one side in the left-right direction of the bowl portion than on the other side, in the rear region of the bowl portion.

7. The flush toilet according to claim 1, wherein the upwardly inclined portion is located in the vicinity of the second water outlet.

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