Water-washable toilet

Abstract

To provide a flush toilet that can prevent wastewater from entering between the rim and its surrounding elements, suppress the generation of odors, and improve the cleanability of the toilet bowl body. [Solution] The flush toilet 1 of the present invention has a toilet body 2 comprising a bowl portion 6 for receiving waste, a rim portion 8 provided on the upper edge of the bowl portion, and a drain trap pipe 10b for discharging waste from the bowl portion. The rim portion provided on the upper edge 6a of the rear region R1 of the bowl portion has an inclined surface 18 whose inner peripheral edge 8a slopes downward toward the inside of the bowl portion, and the inclination angle α1 of this inclined surface has an inclined region S0 that changes along the circumferential direction of the bowl portion.

Description

Technical Field

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with washing water to discharge dirt.

Background Art

[0002] Conventionally, as a flush toilet that is washed with washing water to discharge dirt, for example, as described in Patent Document 1, by providing a recess in a rim portion (rear rim portion) above the rear portion of the bowl portion of the toilet body, sewage splashed on the rear portion of the bowl portion (washing water splashed during washing, water splashed by urine or feces) is made to flow easily from the recess into the bowl portion. In such a conventional flush toilet, the recess provided in the rear rim portion has a flat surface (inclined surface) inclined downward toward the center of the bowl portion, and a space is formed between the inclined surface of this recess and a functional portion disposed at the rear portion of the upper surface of the bowl portion. Thereby, sewage that has entered between the functional portion and the recess can be made to flow easily into the bowl portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional flush toilet, due to the sewage that has entered the space between the recess in the rear rim portion and the functional portion, it is inevitable that dirt adheres to the recess and a part of the functional portion facing it (for example, a base member that holds a local cleaning device for cleaning a user's local area, etc.), which also causes problems such as the generation of odors and the reduction of the cleaning performance of the toilet body. Therefore, a key challenge in recent years has been to prevent wastewater from seeping between the rim and surrounding elements, suppress odor generation, and improve the cleanability of the toilet bowl itself.

[0005] Therefore, the present invention has been made to solve the problems of the conventional technology described above and the issues that have been requested in recent years, and aims to provide a flush toilet that can suppress the intrusion of wastewater between the rim and its surrounding elements, suppress the generation of odors, and improve the cleanability of the toilet bowl body. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flush toilet that washes away waste with flushing water, comprising a toilet body having a bowl portion for receiving waste, a rim portion provided on the upper edge of the bowl portion, and a drain trap pipe for discharging waste from the bowl portion, wherein the rim portion provided on the upper edge of the rear region of the bowl portion has an inclined surface whose inner periphery slopes downward toward the inside of the bowl portion, and the inclination angle of this inclined surface has an inclined region that changes along the circumferential direction of the bowl portion. In the present invention configured as described above, the rim portion provided on the upper edge of the rear region of the bowl portion of the toilet bowl body has an inclined surface on its inner periphery that slopes downward toward the inside of the bowl portion, and the inclination angle of this inclined surface has an inclined region that changes along the circumferential direction of the bowl portion. For example, if the base member of a personal washing device that washes the user's private parts is placed on the inclined surface of the rim portion, the gap between the base member and the inclined surface of the rim portion can be eliminated. Therefore, it is possible to suppress the intrusion of wastewater between the inclined surface of the rim in the rear area of ​​the bowl and its surrounding elements, and also to suppress the generation of odors, thereby improving the cleanability of the toilet bowl itself.

[0007] In the present invention, preferably, the invention further includes a personal washing device for washing the user's private parts, the personal washing device comprising a base member attached to the toilet bowl body, the base member comprising a mounting surface attached along the inclined surface. In the present invention configured as described above, the personal washing device for washing the user's private parts is equipped with a base member that is attached to the upper surface of the toilet bowl body, and this base member is equipped with a mounting surface that is attached along the inclined surface of the rim. Therefore, by attaching the mounting surface of the base member of the personal washing device along the inclined surface of the rim, the gap between the mounting surface of the base member and the inclined surface of the rim can be eliminated. Therefore, the intrusion of wastewater between the mounting surface and the inclined surface of the base member of the local cleaning device can be further suppressed, and the generation of odors can be further suppressed, thereby further improving the cleanability of the toilet bowl itself.

[0008] In the present invention, preferably, in the bowl portion before toilet flushing is started, an initial water level is formed above the inlet of the drain trap pipe, and both ends of the circumferential region are positioned in substantially the same location as both ends of the initial water level in the left-right direction in a plan view. In the present invention configured as described above, an initial water level is formed in the bowl portion of the toilet body above the inlet of the drain trap pipe before toilet flushing is started, and both circumferential ends of the inclined region of the rim portion are positioned at approximately the same location as both left and right ends of the initial water level in a plan view. Therefore, the gap between the mounting surface of the base member of the local flushing device and the inclined surface of the rim portion can be eliminated over a wide area. Therefore, the intrusion of wastewater between the mounting surface and the inclined surface of the base member of the local cleaning device can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0009] In the present invention, preferably, both ends of the circumferential inclined region are located, in a plan view, at a distance of approximately 1 / 3 or less of the total length of the bowl portion in the front-to-back direction, from the rearmost end of the inner circumferential surface of the rim portion toward the front. In the present invention configured in this way, both ends in the circumferential direction of the inclined region of the inner edge of the rim portion are located at a distance of approximately 1 / 3 or less of the total length of the bowl portion in the front-to-back direction, from the rearmost end of the inner circumferential surface of the rim portion toward the front in a plan view. Therefore, the gap between the mounting surface of the base member of the local cleaning device and the inclined surface of the rim portion can be eliminated over a wide area. Therefore, the intrusion of wastewater between the mounting surface and the inclined surface of the base member of the local cleaning device can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0010] In the present invention, preferably, the flush toilet is a siphon-type flush toilet. In the present invention configured in this way, since the flush toilet is a siphon-type flush toilet, a wide initial water surface can be formed in the bowl portion before flushing begins, above the inlet of the drain trap pipe. Therefore, depending on the size of the initial water level, the gap between the mounting surface of the base member of the local cleaning device and the inclined surface of the rim can be eliminated over a wide area. Therefore, the intrusion of wastewater between the mounting surface and the inclined surface of the base member of the local cleaning device can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0011] In the present invention, preferably, the inclined surface at the rearmost end of the rim portion is inclined at an angle of 30 to 60 degrees with respect to the horizontal plane in a side cross-sectional view. In the present invention configured in this way, the inclined surface at the rearmost end of the rim portion is inclined at an angle of 30 to 60 degrees with respect to the horizontal plane in a side cross-sectional view, so that the uppermost position of the local washing device when the base member is attached to the toilet bowl body can be set low. Therefore, it is possible to achieve a lower profile for flush toilets, thereby improving their aesthetic appeal.

[0012] In the present invention, preferably, the inclined region includes a region in which the width of the inclined surface in a direction perpendicular to the circumferential direction is constant along the circumferential direction. In the present invention configured in this way, the inclined region of the rim portion includes a region in which the width of the inclined surface in a direction perpendicular to the circumferential direction is constant along the circumferential direction, thereby suppressing variations in the gap between the mounting surface of the base member and the inclined surface of the rim portion. Therefore, the mounting surface of the base member can be securely and stably attached to the inclined surface of the rim. Therefore, the intrusion of wastewater between the mounting surface and the inclined surface of the base member of the local cleaning device can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0013] In the present invention, preferably, the local cleaning device includes a nozzle, and the inclined region is configured such that the inclination angle of the inclined surface gradually increases along the circumferential direction from both ends in the circumferential direction toward the position of the nozzle. In the present invention configured in this way, the local cleaning device is equipped with a nozzle, and in the inclined region, the inclination angle of the inclined surface gradually increases along the circumferential direction from both ends in the circumferential direction toward the position of the nozzle of the local cleaning device. Therefore, the boundary between the inclined region and the other region can be smoothly formed on the inner circumferential edge of the rim. Therefore, even when cleaning the inner periphery of the rim, the cleaner can avoid any discomfort. In addition, since the inclination angle of the inclined surface closest to the position of the nozzle portion of the local cleaning device can be set to the maximum angle, the nozzle portion can be brought closer to the bowl portion. Therefore, it is possible to achieve a low silhouette for the entire water-washing toilet including the local cleaning device, and it is also possible to improve the design.

[0014] In the present invention, preferably, the inclined surface of the inclined region is set such that the angle formed with the inner peripheral surface of the rim portion is 100 degrees or more in a side cross-sectional view. In the present invention configured as described above, for the inclined surface of the inclined region, since the angle formed with the inner peripheral surface of the rim portion is set to 100 degrees or more in a side cross-sectional view, it is possible to smoothly form the boundary between the inclined region and the other region for the inner peripheral edge of the rim portion. Therefore, when cleaning the inner peripheral edge of the rim portion, it is possible to eliminate the discomfort of the cleaner. <0ver000083>In addition, since the inclination angle of the inclined surface closest to the position of the nozzle portion of the local cleaning device can be set to the maximum angle, the nozzle portion can be brought closer to the bowl portion. [[ID=]14]Therefore, it is possible to achieve a low silhouette for the entire water-washing toilet including the local cleaning device, and it is also possible to improve the design.

[0015] In the present invention, preferably, the inclined surface of the inclined region is set such that the angle formed with the upper surface of the rim portion is 100 degrees or more in a side cross-sectional view. In the present invention configured as described above, for the inclined surface of the inclined region, since the angle formed with the upper surface of the rim portion is set to 100 degrees or more in a side cross-sectional view, it is possible to smoothly form the boundary between the inclined region and the other region for the inner peripheral edge of the rim portion Therefore, when cleaning the inner peripheral edge of the rim portion, it is possible to eliminate the discomfort of the cleaner. In addition, since the inclination angle of the inclined surface closest to the position of the nozzle portion of the local cleaning device can be set to the maximum angle, the nozzle portion can be brought closer to the bowl portion. Therefore, it is possible to achieve a low silhouette for the entire water-washed toilet including the local cleaning device, and the design can also be improved.

Advantages of the Invention

[0016] According to the water-washed toilet of the present invention, it is possible to suppress the intrusion of sewage between the rim portion and its peripheral elements, suppress the generation of odors, and improve the cleaning property of the toilet body.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 15 is a schematic perspective view of a water-washed toilet according to an embodiment of the present invention. [Figure 2] FIG. 18 is a schematic plan view of a water-washed toilet according to an embodiment of the present invention. [Figure 3] FIG. 21 is a partially enlarged perspective view seen obliquely from above of a rear side portion of a rib portion of a toilet body of a water-washed toilet according to an embodiment of the present invention. [Figure 4] FIG. 24 is a cross-sectional view taken along line IV-IV of FIG. 2.

Embodiments for Carrying Out the Invention

[0018] Hereinafter, a water-washed toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, FIGS. 1 and 2 respectively show a schematic perspective view and a schematic plan view of a water-washed toilet according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the water-washed toilet 1 according to an embodiment of the present invention includes a toilet body 2 installed on a floor surface F and a functional unit 4 provided on the rear side of the toilet body 2. Here, in the water-washed toilet 1 of the present embodiment, an example of a form of a so-called "floor-mounted water-washed toilet" in which the bottom surface of the toilet body 2 is installed so as to contact the floor surface F will be described. However, as a modified version of the flush toilet 1 of this embodiment, a so-called "wall-mounted flush toilet" is also applicable, in which the bottom surface of the toilet body 2 is positioned so as to be spaced upward from the floor surface F, and the rear end of the toilet body 2 is fixed to the wall behind it. Furthermore, while the toilet bowl itself is made of ceramic, it is not limited to ceramic; it may also be made of resin, or a combination of ceramic and resin.

[0019] Next, as shown in Figures 1 and 2, the toilet bowl body 2 comprises a bowl portion 6 for receiving waste, a rim portion 8 formed on the upper edge of the bowl portion 6, and a drain trap portion 10 that extends from an inlet portion 10a connected to the bottom of the bowl portion 6 and forms a drain trap pipe 10b for discharging waste from the bowl portion 6. As a result, the flush toilet 1 of this embodiment is a so-called "siphon-type flush toilet" that uses the siphon action to suck up the waste in the bowl portion 6 of the toilet body 2 and discharge it to the outside all at once from the drain trap portion 10.

[0020] Furthermore, as shown in Figures 1 and 2, the functional unit 4 includes, for example, a valve unit 12 that contributes to the toilet flushing function, a water storage tank (not shown) in which flushing water supplied from a water source such as a water tap is stored, a pump (not shown) that pressurizes the flushing water in the water storage tank (not shown) to the bowl portion 6 of the toilet body 2, and a local flushing device 14 for cleaning the user's private parts. Furthermore, the local bidet 14 is equipped with a base member 16 located at its bottom. This base member 16 is attached to and fixed to the upper surface 2a of the toilet bowl 2, thereby fixing the entire local bidet 14 to the toilet bowl 2.

[0021] Next, Figure 3 is a partially enlarged perspective view of the rear portion of the rib section of the toilet bowl body of a flush toilet according to one embodiment of the present invention, viewed from diagonally above. Figure 4 is a cross-sectional view along line IV-IV in Figure 2. Here, as shown in Figure 2, in a plan view of the bowl portion 6 of the toilet body 2, the area within the bowl portion 6 on the front side of the horizontal line A1 that divides the bowl portion 6 into two equal parts front to back is defined as the "front region F1 of the bowl portion 6", and the area within the bowl portion 6 on the rear side of the horizontal line A1 is defined as the "rear region R1 of the bowl portion 6". As a result, as shown in Figures 2 to 4, the rim portion 8 provided on the upper edge 6a of the rear region R1 of the bowl portion 6 of the toilet body 2 has an inclined surface 18 on its inner peripheral edge 8a that slopes downward toward the inside of the bowl portion 6, and the inclination angle α1 of this inclined surface 18 has an inclined region S0 that changes along the circumferential direction of the bowl portion 6. Furthermore, as shown in Figure 4, the base member 16 is equipped with a mounting surface 16a that is attached without gaps along the inclined surface 18 of the rim portion 8 of the toilet bowl body 2.

[0022] Next, as shown in Figure 2, the circumferential ends P1 and P2 (left end P1, right end P2) of the inclined region S0 are located at a distance L1 in a plan view that is approximately 1 / 3 or less of the total length L0 of the inner circumference of the bowl portion 6, moving forward from the rearmost end 8b of the inner circumferential surface of the rim portion 8 (more specifically, the rearmost end 8b of the innermost circumferential edge of the rim portion 8). Furthermore, as shown in Figures 2 to 4, the inclined region S0 includes a region S1 (constant inclination width region S1) in which the width d1 (inclination width d1) of the inclined surface 18 in a direction perpendicular to its circumferential direction is constant along the circumferential direction. Furthermore, as shown in Figure 4, the inclined surface 18 at the rearmost end 8b of the innermost peripheral edge of the rim portion 8 is inclined at a predetermined inclination angle α1 with respect to the horizontal plane H1 in a side cross-sectional view. Here, it is preferable that the inclination angle α1 be set to between 30 and 60 degrees.

[0023] Next, as shown in Figure 2, in the bowl portion 6 of the toilet body 2 before toilet flushing is started, an initial water level W0 is formed above the inlet portion 10a of the drain trap pipe 10b. Furthermore, as shown in Figure 2, the circumferential ends P3 and P4 (left end P3, right end P4) of the constant-width inclination region S1 of the rim portion 8 are positioned in approximately the same locations as the left and right ends P5 and P6 (left end P5, right end P6) of the initial water surface W0 in a plan view. As a result, in the inclined region S0, within the constant inclination width region S1, the inclined surface 18 is formed with a constant inclination width d1 from the rearmost end P0 of the inner peripheral edge 8a of the rim portion 8 to both ends P3 and P4 of the constant inclination width region S1 in the left and right circumferential directions, and then the width d1 of the inclined surface 18 is formed to gradually decrease to both ends P1 and P2 in the circumferential direction of the inclined region S0.

[0024] Next, as shown in Figures 2 and 4, the local cleaning device 14 is equipped with a nozzle portion 20 located in the center of its base member 16 in the left-right direction. The nozzle portion 20 is positioned above the rearmost end P0 of the inner peripheral edge 8a of the rim portion 8. Furthermore, in the inclined region S0, the inclination angle α1 of the inclined surface 18 is set to gradually increase along the circumferential direction from both ends P1 and P2 toward the position of the nozzle portion 20 of the local cleaning device 14.

[0025] Furthermore, as shown in Figure 4, in a side cross-sectional view, the angle β1 formed between the inclined surface 18 of the inclined region S0 and the inner circumferential surface 8c of the rim portion 8 rising from the upper edge 6a of the bowl portion 6 is set to 100 degrees or more, and the angle γ1 formed with the upper surface 8d of the rim portion 8 is also set to 100 degrees or more.

[0026] Next, with reference to Figures 1 to 4, the operation of the flush toilet 1 according to the embodiment described above will be explained. First, according to the flush toilet 1 of this embodiment, the inner peripheral edge 8a of the rim portion 8 of the toilet body 2 is provided with an inclined surface 18 that slopes downward toward the bowl portion 6, and the inclination angle α1 of this inclined surface 18 is provided with an inclined region S0 that changes along the circumferential direction of the bowl portion 6. As a result, even if the base member 16 of the local cleaning device 14, which cleans the user's private parts, is placed on the inclined surface 18 of the rim portion 8, the gap between the base member 16 and the inclined surface 18 of the rim portion 8 can be eliminated. Therefore, it is possible to suppress the intrusion of wastewater between the inclined surface 18 of the rim portion 8 and its surrounding elements, and also to suppress the generation of odors, thereby improving the cleanability of the toilet bowl body 2.

[0027] Next, according to the flush toilet 1 of this embodiment, a personal washing device 14 for washing the user's private parts is provided with a base member 16 that is attached to the upper surface 2a of the toilet body 2, and this base member 16 is provided with a mounting surface 16a that is attached along the inclined surface 18 of the rim portion 8. This allows the mounting surface 16a of the base member 16 of the local cleaning device 14 to be mounted along the inclined surface 18 of the rim portion 8, thereby eliminating the gap between the mounting surface 16a of the base member 16 and the inclined surface 18 of the rim portion 8. Therefore, the intrusion of wastewater between the mounting surface 16a and the inclined surface 18 of the base member 16 of the local cleaning device 14 can be further suppressed, and the generation of odors can be further suppressed, thereby further improving the cleanability of the toilet bowl itself.

[0028] Furthermore, according to the flush toilet 1 of this embodiment, as shown in Figure 2, in the bowl portion 6 of the toilet body 2 before toilet flushing is started, an initial water level W0 is formed above the inlet portion 10a of the drain trap pipe 10b, and the circumferential ends P3 and P4 of the constant inclination width region S1 of the inclined region S0 of the rim portion 8 are positioned in approximately the same location as the left and right ends P5 of the initial water level W0 in a plan view. This makes it possible to eliminate the gap between the mounting surface 16a of the base member 16 of the local cleaning device 14 and the inclined surface 18 of the rim portion 8 over a wide area. Therefore, the intrusion of wastewater between the mounting surface 16a and the inclined surface 18 of the base member 16 of the local cleaning device 14 can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0029] Furthermore, according to the flush toilet 1 of this embodiment, as shown in Figure 2, both ends P1 and P2 in the circumferential direction of the inclined region S0 of the inner peripheral edge 8a of the rim portion 8 of the toilet body 2 are located at a distance L1 in a plan view that is approximately 1 / 3 or less of the total length L0 of the bowl portion 6 in the front-to-back direction, moving forward from the rearmost end 8b of the inner peripheral surface of the rim portion 8. This makes it possible to eliminate the gap between the mounting surface 16a of the base member 16 of the local cleaning device 14 and the inclined surface 18 of the rim portion 8 over a wide area. Therefore, the intrusion of wastewater between the mounting surface 16a and the inclined surface 18 of the base member 16 of the local cleaning device 14 can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0030] Furthermore, according to the flush toilet 1 of this embodiment, since the flush toilet 1 is a siphon-type flush toilet, a wide initial water level W0 can be formed in the bowl portion 6 before flushing is started, above the inlet portion 10a of the drain trap pipe 10b. Therefore, depending on the size of the initial water level W0, the gap between the mounting surface 16a of the base member 16 of the local cleaning device 14 and the inclined surface 18 of the rim portion 8 can be eliminated over a wide area. Therefore, the intrusion of wastewater between the mounting surface 16a and the inclined surface 18 of the base member 16 of the local cleaning device 14 can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0031] Furthermore, according to the flush toilet 1 of this embodiment, as shown in Figure 4, the inclined surface 18 at the rearmost end 8b,P0 of the rim portion 8 of the toilet body 2 is inclined at an angle α of 30 to 60 degrees with respect to the horizontal plane H1 in a side cross-sectional view. Therefore, the uppermost position of the local washing device 14 when the base member 16 is attached to the toilet body 2 can be set lower. Therefore, it is possible to achieve a low profile for the flush toilet 1, thereby improving its aesthetic appeal.

[0032] Furthermore, according to the flush toilet 1 of this embodiment, the inclined region S0 of the rim portion 8 of the toilet body 2 includes a region S1 (constant inclination width region S1) in which the width d1 of the inclined surface 18 in a direction perpendicular to the circumferential direction is constant along the circumferential direction, thereby suppressing variations in the gap between the mounting surface 16a of the base member 16 and the inclined surface 18 of the rim portion 8. Therefore, the mounting surface 16a of the base member 16 can be reliably and stably attached to the inclined surface 18 of the rim portion 8. Therefore, the intrusion of wastewater between the mounting surface 16a and the inclined surface 18 of the base member 16 of the local cleaning device 14 can be more effectively suppressed, and the generation of odors can be further suppressed, thereby more effectively improving the cleanability of the toilet bowl itself.

[0033] Furthermore, as shown in Figures 2 to 4, in the flush toilet 1 according to this embodiment, the local cleaning device 14 is equipped with a nozzle portion 20, and in the inclined region S0, the inclination angle of the inclined surface is configured to gradually increase along the circumferential direction from both ends P1 and P2 in the circumferential direction toward the position of the nozzle portion 20 of the local cleaning device 14. Furthermore, as shown in Figure 4, in a side cross-sectional view, the angle β1 between the inclined surface 18 of the inclined region S0 and the inner circumferential surface 8c of the rim portion 8 is set to 100 degrees or more, and the angle γ1 between the inclined surface 18 and the upper surface 8d of the rim portion 8 is also set to 100 degrees or more. These measures make it possible to smoothly form the boundary between the inclined region S0 and the other region of the inner peripheral edge 8a of the rim portion 8. Therefore, when cleaning the inner peripheral edge 8a of the rim portion 8, the cleaner will not feel any discomfort. Furthermore, since the inclination angle of the inclined surface 18 that is closest to the nozzle portion 20 of the local cleaning device 14 can be set to the maximum angle, the nozzle portion 20 can be brought closer to the bowl portion 6. Therefore, it is possible to achieve a low profile for the entire flush toilet 1, including the local cleaning device 14, and improve its aesthetic appeal. [Explanation of Symbols]

[0034] 1. A flush toilet according to one embodiment of the present invention. 2 Toilet bowl 2a Top surface of the toilet bowl 4. Functional Section 6. Bowl portion of the toilet bowl 6a Upper edge of the bowl 8. Rim of the toilet bowl 8a Inner peripheral edge of the rim 8b The rearmost edge of the innermost periphery of the rim (the rearmost edge of the rim) 8c Inner circumferential surface of the rim 8d Upper surface of the rim 10. Drain trap section of the toilet bowl 10a Inlet of drain trap pipe 10b Drain trap pipe 12 Valve Unit 14 Local Cleansing Device 16 Base member 16a Mounting surface 18 Slope 20 Nozzle section A1 A horizontal line that divides the inside of the bowl into two equal parts, front to back. d1: Width of the inclined surface in a direction perpendicular to the circumferential direction of the inclined region. F Floor F1 Anterior region within the bowl section R1 Rear region within the bowl section H1 horizontal plane L0: The total length of the bowl section in the front-to-back direction, starting from the rearmost end of the inner circumference of the rim section and moving forward. P0 The rearmost end of the inner circumference of the rim (the rearmost end of the rim) P1 Left end of the circumferential direction of the inclined area of ​​the rim P2 Rightmost circumferential end of the inclined region of the rim P3 Left end of the circumferential region of the rim with a constant inclination width P4 Rightmost point in the circumferential direction of the area with a constant inclination width in the rim section P5 Left edge of the initial water level P6 Right edge of the initial reservoir surface S0 slope area S1 Constant slope width area W0 Initial water level α1 Inclination angle β1 Angle between the inclined surface of the inclined region and the inner circumferential surface of the rim. γ1 Angle between the inclined surface of the inclined region and the upper surface of the rim.

Claims

1. A flush toilet that uses flushing water to wash away waste, The toilet has a bowl portion for receiving waste, a rim portion provided on the upper edge of the bowl portion, and a drain trap pipe for discharging waste from the bowl portion. A flush toilet characterized in that the rim portion provided on the upper edge of the rear region of the bowl portion has an inclined surface whose inner peripheral edge slopes downward toward the inside of the bowl portion, and the inclination angle of this inclined surface has an inclined region that changes along the circumferential direction of the bowl portion.

2. Furthermore, the flush toilet according to claim 1, which has a personal washing device for washing the user's private parts, the personal washing device comprising a base member attached to the toilet bowl body, the base member comprising a mounting surface attached along the inclined surface.

3. The flush toilet according to claim 2, wherein, in the bowl portion before the start of toilet flushing, an initial water level is formed above the inlet of the drain trap pipe, and both ends in the circumferential direction of the inclined region are positioned in substantially the same location as both ends in the left-right direction of the initial water level in a plan view.

4. The flush toilet according to claim 2, wherein both ends of the circumferential inclined region are located, in a plan view, at a distance of approximately 1 / 3 or less of the total length of the bowl portion in the front-to-back direction, from the rearmost end of the inner circumferential surface of the rim portion toward the front.

5. The flush toilet described above is a siphon-type flush toilet according to claim 2.

6. The flush toilet according to claim 2, wherein the inclined surface at the rearmost end of the rim portion is inclined at an angle of 30 to 60 degrees with respect to the horizontal plane in a side cross-sectional view.

7. The flush toilet according to claim 2, wherein the above-mentioned inclined region includes a region in which the width of the above-mentioned inclined surface in a direction perpendicular to the circumferential direction is constant along the circumferential direction.

8. The toilet flushing device according to claim 2, wherein the above-mentioned local cleaning device is equipped with a nozzle, and the inclined region is configured such that the inclination angle of the inclined surface gradually increases along the circumferential direction from both ends in the circumferential direction toward the position of the nozzle.

9. The flush toilet according to claim 2, wherein the angle between the inclined surface of the inclined region and the inner circumferential surface of the rim portion in a side cross-sectional view is set to 100 degrees or more.

10. The flush toilet according to claim 2, wherein the angle between the inclined surface of the inclined region and the upper surface of the rim portion in a side cross-sectional view is set to 100 degrees or more.

Images