JP2021099023A - Flush toilet bowl - Google Patents

Abstract

To provide a flush toilet bowl capable of preventing splashing of cleaning water discharged from a rim water discharge port, and effectively improving visibility and cleanability of a water passage on the downstream side of the rim water discharge port.SOLUTION: A flush toilet bowl 1 includes a bowl portion 20 with a filth receiving surface 14 and a rim portion 18. A rim water passage 24 and a rim water discharge port 26 are formed on either side of the rim in a front side area F1 of the bowl portion. A water passage 30 formed on the downstream side of the rim water discharge port has a flow channel cross-section G formed by an inner surface 46 of the rim portion, a shelf surface 16, and an overhang portion 48. The cross-section of the water passage is set so that a cross-sectional area A0 becomes almost constant toward the downstream side, and a height dimension L is set to be larger toward the downstream side, and a width W is set to be smaller toward the downstream side.SELECTED DRAWING: Figure 9

Description

The present invention relates to a washing toilet bowl, and more particularly to a washing toilet bowl that is washed with washing water supplied from a washing water source and discharges filth.

Conventionally, as a washing urinal that is washed by the washing water supplied from the washing water source and discharges filth, for example, as described in Patent Document 1, the washing water is spouted onto the shelf of the bowl portion. The rim spout of the rim water passage that forms a swirling flow is formed in the front region of the bowl portion, and in the water passage immediately after this rim spout, only a part of the inner peripheral surface of the rim portion covers inward. Those formed in a hung shape are known.

Further, as described in Patent Document 2, a flush toilet bowl in which the vertical dimension of the rim water passage formed on the upper edge of the bowl portion is set to gradually decrease toward the downstream side. Is also known.

Japanese Unexamined Patent Publication No. 2013-44177 Japanese Patent No. 5843314 (Japanese Unexamined Patent Publication No. 2011-12508)

However, in the conventional flush stools described in Patent Documents 1 and 2 described above, the cross-sectional area of the water passage cross section of the water passage formed on the downstream side of the rim spout is on the downstream side from the rim spout. Since it is not set to be constant toward, if the height of the water passage cross section on the downstream side of the rim spout is set to be larger toward the downstream side, the water passage on the downstream side of the rim spout There is a problem that the rim spouting water passing through the water flow cross section may be disturbed and the washing water may be scattered.
Further, there is a problem that the larger the area of the overhang portion covering the water passage on the downstream side of the rim spout, the lower the visibility and cleanability of the water passage on the downstream side of the rim spout.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to prevent the washing water discharged from the rim spout from being scattered and downstream of the rim spout. It is an object of the present invention to provide a flush toilet that can effectively improve the visibility and cleanability of the water passage on the side.

In order to achieve the above-mentioned object, the present invention is a water-washing urinal that is washed by washing water supplied from a washing water source and discharges filth, and is on a bowl-shaped filth receiving surface and the filth receiving surface. A bowl portion provided with a rim portion formed on the edge, a drainage channel connected below the bowl portion to discharge filth, and a drainage channel provided on the rim portion to spout wash water into the bowl portion to swirl. It has a rim water discharge part that forms a flow and a headrace that supplies the wash water supplied from the wash water source to the rim water discharge part, and the bowl part divides the bowl part into two equal parts in the front-rear direction. The front side region which is the front side and the rear side region which is the rear side with respect to the center line extending in the left-right direction are provided, and the rim water discharge portion is either left or right in the front side region of the bowl portion. A rim water passage through which the washing water supplied from the headrace can pass is formed in the rim portion on the side, and a rim spout for discharging the washing water backward is formed at the downstream end of the rim water passage. The water passage formed on the downstream side of the rim spout is the inner peripheral surface of the rim portion, the shelf surface formed on the lower side of the inner peripheral surface of the rim portion, and the upper side of the inner peripheral surface. The flow path cross section is formed by the overhang portion formed in, and the flow path cross section is formed so that the cross-sectional area of the flow path cross section becomes substantially constant from the rim spout to the downstream side. The height dimension is set larger toward the downstream side, and the width thereof is set smaller toward the downstream side.
In the present invention configured as described above, the water passage formed on the downstream side of the rim spout is the inner peripheral surface of the rim portion, the shelf surface formed on the lower side of the inner peripheral surface of the rim portion, and the shelf surface. , The cross section of the flow path is formed by the overhang portion formed on the upper side of the inner peripheral surface of the rim portion, and the cross-sectional area of the cross section of the flow path becomes almost constant from the rim spout toward the downstream side. As described above, the height dimension of the cross section of the flow path is set larger toward the downstream side, and the width of the cross section of the flow path is set smaller toward the downstream side. The rim spout that passes through the cross section of the water passage on the downstream side of the rim can flow to the downstream side along the water passage without being disturbed, effectively providing a stable swirling flow in the bowl on the downstream side. Can be formed into.
In addition, the wash water discharged from the rim spout can be prevented from scattering by forming a stable flow on the downstream side along the water passage on the downstream side, so that the bowl portion can be visually recognized. It is possible to effectively improve the property and cleanability.
In addition, "the cross-sectional area is almost constant" here means not only completely constant, but also rim water discharge that passes through the flow path cross section of the water passage on the downstream side of the rim water discharge port after water is discharged from the rim water discharge port. , The turbulence is suppressed and can flow to the downstream side along the water passage, and a stable swirling flow can be effectively formed in the bowl portion on the downstream side.

In the present invention, preferably, the shelf surface forming the flow path cross section is formed so that the height position thereof is substantially constant from the rim spout toward the downstream side.
In the present invention configured as described above, the height position of the shelf surface forming the flow path cross section of the water passage formed on the downstream side of the rim spout is substantially constant from the rim spout toward the downstream side. By being formed so as to be at a high position, the rim water discharge that passes through the flow path cross section of the water passage on the downstream side of the rim water discharge port after being discharged from the rim water discharge port is suppressed from being disturbed and passes through. It can flow to the downstream side along the waterway, and a stable swirling flow can be formed more effectively on the downstream side.
In addition, the wash water discharged from the rim spout can be prevented from scattering by forming a stable flow on the downstream side along the water passage on the downstream side, so that the bowl portion can be visually recognized. It is possible to improve the property and cleanability more effectively.
The "almost constant height position" here is not only completely constant, but also rim water discharge that passes through the flow path cross section of the water passage on the downstream side of the rim water discharge port after water is discharged from the rim water discharge port. However, the disturbance is suppressed and the flow can flow to the downstream side along the water passage, and a stable swirling flow can be effectively formed in the bowl portion on the downstream side.

In the present invention, preferably, the overhang portion forming the cross section of the flow path is formed so that the height position thereof is substantially constant from the rim spout toward the downstream side.
In the present invention configured as described above, the height position of the overhang portion forming the flow path cross section of the water passage formed on the downstream side of the rim spout is substantially constant from the rim spout toward the downstream side. By being formed so as to be at the height position of, the rim spout that passes through the flow path cross section of the water passage on the downstream side of the rim spout after being spouted from the rim spout is suppressed from being disturbed. It can flow to the downstream side along the water passage, and a stable swirling flow can be formed more effectively on the downstream side.
In addition, the wash water discharged from the rim spout can be prevented from scattering by forming a stable flow on the downstream side along the water passage on the downstream side, so that the bowl portion can be visually recognized. It is possible to improve the property and cleanability more effectively.
The "almost constant height position" here is not only completely constant, but also rim water discharge that passes through the flow path cross section of the water passage on the downstream side of the rim water discharge port after water is discharged from the rim water discharge port. However, the turbulence is suppressed and the flow can flow to the downstream side along the water passage, and a stable swirling flow can be effectively formed in the bowl portion on the downstream side.

In the present invention, preferably, the ratio (U:) of the minimum height dimension (U) of the overhang portion in the cross section of the flow path to the maximum height dimension (L) from the shelf surface to the lower end of the overhang portion (U: L) is set to 1: 6 to 6: 1.
In the present invention configured as described above, the minimum height dimension (U) of the overhang portion in the flow path cross section of the water passage formed on the downstream side of the rim spout and from the shelf surface to the lower end of the overhang portion. Since the ratio (U: L) to the maximum height dimension (L) of is set to 1: 6 to 6: 1, after water is discharged from the rim spout, the passage on the downstream side of the rim spout The rim discharge water passing through the flow path cross section of the water channel can flow to the downstream side along the inside of the water channel without being disturbed, and a stable swirling flow can be formed more effectively on the downstream side. ..
In addition, the wash water discharged from the rim spout can be prevented from scattering by forming a stable flow on the downstream side along the water passage on the downstream side, so that the bowl portion can be visually recognized. It is possible to improve the property and cleanability even more effectively.

In the present invention, preferably, the opening cross section of the rim spout is formed in a triangular shape, and one side of the triangular rim spout forms the overhang portion.
In the present invention configured as described above, the opening cross section of the rim spout is formed in a triangular shape, and one side of the triangular rim spout forms an overhang portion, whereby, for example, an opening. The area of the overhang portion can be made smaller than that of a rim spout having a rectangular cross section and having the same width as the opening cross section of the triangular rim spout.
Therefore, after the water is discharged from the rim spout, the rim spout passing through the flow path cross section of the water passage on the downstream side of the rim spout can be suppressed from being disturbed and flow to the downstream side along the water passage. , A stable swirling flow can be formed on the downstream side even more effectively.
In addition, the wash water discharged from the rim spout can be prevented from scattering by forming a stable flow on the downstream side along the water passage on the downstream side, so that the bowl portion can be visually recognized. It is possible to improve the property and cleanability even more effectively.

According to the water-washing toilet bowl of the present invention, it is possible to prevent the washing water discharged from the rim spout from being scattered, and to effectively improve the visibility and cleanability of the water passage on the downstream side of the rim spout. Can be enhanced to.

It is a perspective view which shows the flush toilet by the 1st Embodiment of this invention, and shows the state which the toilet lid and the toilet seat are rotated to the upper position. It is a cross-sectional view of the central cross section in the left-right direction of the flush toilet according to the first embodiment of the present invention seen from the left side, and shows a state in which the toilet lid and the toilet seat are rotated to a lower position. FIG. 3 is a partial plan view showing a toilet bowl main body portion of the flush toilet bowl according to the first embodiment of the present invention shown in FIG. FIG. 3 is an enlarged partially enlarged plan view of a portion of a rim water passage formed inside the rim portion in the toilet bowl main body portion of the flush toilet according to the first embodiment of the present invention shown in FIG. It is a partially enlarged sectional view of the rim part along the VV line of FIG. It is A cross section of the rim water passage shown in FIG. It is a B cross section of the rim water passage shown in FIG. It is a C cross section of the rim water passage shown in FIG. It is a D cross section of the rim water passage shown in FIG. It is an E cross section of the rim water passage shown in FIG. In the flush toilet according to the first embodiment of the present invention shown in FIG. 2, it is a partially enlarged side surface portion in which the portion of the water passage near the downstream side of the rim spout is enlarged. FIG. 6 is a cross-sectional view taken along the line VIII-VII of FIG. FIG. 5 is a cross-sectional view taken along the line XI-XI of FIG. Relationship between the distance (x) on the downstream side in the circumferential direction from the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the first embodiment of the present invention and the height dimension (U) of the overhang portion. It is a figure which showed qualitatively. Distance (x) from the rim spout to the downstream side in the circumferential direction and the maximum height from the shelf surface to the lower end of the overhang portion in the water passage near the downstream side of the rim spout of the flush toilet according to the first embodiment of the present invention. It is a figure which qualitatively showed the relationship with the dimension (L). The distance (x) on the downstream side in the circumferential direction from the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the first embodiment of the present invention and the width (W) of the water passage on the downstream side of the rim spout. ) Is shown qualitatively. FIG. 3 is a cross-sectional view taken along the line XI-XI of FIG. It is sectional drawing along the XII-XII line of FIG. In the flush toilet according to the first embodiment of the present invention, the distance (x) and the curvature (1 / ρ) on the downstream side in the circumferential direction from the rim spout when the straight portion and the curved portion of the bowl portion are connected by a transition curve. ) Is shown qualitatively. This is a comparative example of the flush toilet bowl according to the first embodiment of the present invention shown in FIG. 13A, and is the downstream side in the circumferential direction from the rim spout when the straight portion and the bent portion of the bowl portion are connected by a curve that is in direct contact with the straight line. It is a figure which qualitatively showed the change of the distance (x) and the curvature (1 / ρ) of. It is a cross-sectional view similar to FIG. 8 in the water passage on the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. It is a cross-sectional view similar to FIG. 9 in the water passage on the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. Relationship between the distance (x) on the downstream side in the circumferential direction from the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention and the height dimension (U) of the overhang portion. Is a figure qualitatively shown. Distance (x) from the rim spout to the downstream side in the circumferential direction and the maximum height from the shelf surface to the lower end of the overhang portion in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. It is a figure which qualitatively showed the relationship with the dimension (L). The distance (x) from the rim spout to the downstream side in the circumferential direction and the width (W) of the water passage on the downstream side of the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. ) Is shown qualitatively. It is schematic cross-sectional view which shows roughly the cross section part (the cross section part of the flow path of a rim spout and the water passage on the downstream side) near the rim spout in the flush toilet according to the 3rd Embodiment of this invention.

Next, the flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 13.
First, FIG. 1 is a perspective view showing a flush toilet according to the first embodiment of the present invention, showing a state in which the toilet lid and the toilet seat are rotated to an upward position. Further, FIG. 2 is a cross-sectional view of the central cross section of the flush toilet according to the first embodiment of the present invention in the left-right direction as viewed from the left side, and shows a state in which the toilet lid and the toilet seat are rotated to the lower position. Further, FIG. 3 is a partial plan view showing a toilet bowl main body portion of the flush toilet bowl according to the first embodiment of the present invention shown in FIG.

As shown in FIGS. 1 to 3, the flush toilet bowl 1 according to the first embodiment of the present invention includes a pottery bowl body 2 and a toilet seat rotatably arranged on the upper surface of the toilet bowl body 2. 4, a toilet lid 6 rotatably arranged in the vertical direction so as to cover the toilet seat 4, and a functional unit 8 arranged behind the toilet body 2.
Further, as shown in FIG. 2, the functional unit 8 is arranged in the upper rear part of the toilet bowl main body 2 and functions as a sanitary cleaning unit for cleaning a local part of the user, and a sanitary cleaning system functional unit 10 and the sanitary cleaning system. It is arranged close to the functional unit 10 and includes a water supply system functional unit 12 involved in the water supply function to the toilet bowl main body 2.

Next, as shown in FIGS. 1 to 3, the toilet bowl main body 2 has a bowl-shaped filth receiving surface 14 and a rim portion 18 formed so as to rise from the shelf surface 16 on the upper edge of the filth receiving surface 14. The bowl portion 20 is provided.
Further, as shown in FIG. 2, the toilet bowl main body 2 is provided with a drain trap pipeline 22 which is a drainage channel for discharging filth in the bowl portion 20 by connecting an inlet portion 22a below the bowl portion 20. ..

Next, as shown in FIG. 3, the bowl portion 20 divides the front side region F1 which is the front side and the rear side region R1 which is the rear side with respect to the center line C1 extending in the left-right direction which is bisected in the front-rear direction. The rim portion 18 on one of the left and right sides in the front side region F1 of the bowl portion 20, that is, the rim portion 18 on the right side in the front side region F1 of the bowl portion 20 when viewed from the front of the toilet body 2. A rim water passage 24 (details will be described later) is formed inside the rim water discharge portion.
Further, at the downstream end of the rim water passage 24, a rim spout 26 (details will be described later), which is a part of the rim spout portion, is formed.
Further, as shown in FIG. 3, the upstream side of the rim water passage 24 is connected to the water pipe 28, which is a water pipe that supplies the washing water supplied from the water supply (not shown), which is the washing water source, to the rim water passage 24. It is connected. The upstream side of the water pipe 28 is directly connected to a water supply (not shown) which is a water source for washing, and the washing water supplied from the water pipe 28 into the rim water passage 24 by using the water supply pressure of this water pipe 28. Is guided forward in the rim water passage 24, then bends inward and rearward, and is guided to the rim spout 26 on the downstream side.
Then, the washing water guided to the rim spout 26 is discharged rearward (rim spout), passes through a water passage 30 (details will be described later) formed in the vicinity of the downstream side of the rim spout 26, and the bowl portion. By swirling in the bowl portion 20, a swirling flow is formed in the bowl portion 20.
The rim spout 26 is the only spout provided in the rim portion 18 to spout wash water to form a swirling flow in the bowl portion 20.

In the flush toilet bowl 1 of the present embodiment, the rim water passage 24 and the rim water discharge port 26, which are rim water discharge portions, are rims on the right side in the front side region F1 of the bowl portion 20 when viewed from the front of the toilet bowl body 2. The form arranged inside the portion 18 will be described, but the present invention is not limited to such a form, and the rim spout is located on the left rim portion 18 in the front side region F1 of the bowl portion 20 when viewed from the front of the toilet bowl body 2. It may be arranged so that the rim water is discharged toward the rear.
In short, the rim water passage and the rim spout, which are the rim spouts, are arranged in the rim 18 on either the left or right side in the front region F1 of the bowl portion 20 so that the rim spouts backward. Any form may be used.
Further, in the flush toilet bowl 1 of the present embodiment, the rim water discharge portion 24 and the rim water discharge port 26 are integrally formed with the toilet bowl body 2 by processing pottery. For example, resin. It may be formed as a separate body from the toilet bowl body 2 and attached to the toilet bowl body 2.

Further, as shown in FIG. 2, a jet spout 32 is formed at the bottom of the bowl portion 20 so as to be directed to the inlet portion 22a of the drain trap pipeline 22. Regarding the water discharge (jet water discharge) by the jet water discharge port 32, the washing water stored in the water storage tank 34 provided in the water supply system function unit 12 is pressurized by the pressurizing pump 36 of the water supply system function unit 12. , It is designed to be discharged from the jet spout 32.
Further, the wash water discharged from the jet spout 32 flows into the ascending pipe 22b on the rear side of the inlet 22a from the inlet 22a of the drain trap pipeline 22, and then flows into the ascending pipe 22b. It flows out from the top 22c of the drain trap pipeline 22 to the descending pipeline 22d.

Here, since the specific structures of the sanitary cleaning system functional unit 10 and the water supply system functional unit 12 are the same as those of the conventional ones, detailed description thereof will be omitted, but the sanitary cleaning system functional unit 10 will be described. Is provided with a local cleaning device (not shown) including a nozzle device (not shown) that injects cleaning water toward the user above the bowl portion 20.
In addition, the sanitary cleaning system functional unit 10 has a water storage unit (not shown) for storing the cleaning water supplied to the local cleaning device (not shown), and the cleaning water in the water storage unit (not shown) at an appropriate temperature. A heater (not shown), a ventilation fan (not shown), a deodorizing fan (not shown), a hot air fan (not shown), and a controller that controls the operation of these devices. (Not shown) and the like are provided.
On the other hand, the water supply channel (not shown) of the water supply system functional unit 12 is connected to the water supply (not shown) whose upstream side is the water supply source, and is connected to the water supply channel on the upstream side of the water storage tank (not shown). Is provided with a constant flow valve (not shown), a solenoid valve (not shown), a switching valve (not shown) for switching between water supply to the water storage tank (not shown) and water discharge to the rim spout 26. Has been done. In addition to these, the water supply system function unit 12 also has an opening / closing operation of a solenoid valve (not shown), a switching operation of a switching valve (not shown), and a rotation speed of a pressurizing pump (not shown). A controller (not shown) that controls the operation time and the like is provided.

In the flush toilet bowl 1 according to the present embodiment, the rim water discharge by the rim water discharge port 26 is performed by using the water supply pressure of the tap water, and the pressure pump (not shown) is controlled for the jet water discharge by the jet water discharge port 32. The form of the so-called hybrid type flush toilet that supplies the flush water in the water storage tank (not shown) will be described, but the present invention is not limited to such a form and can be applied to other forms. That is, as another form, even if the washing water directly supplied only from the tap water is switched between the rim water discharge by the rim water discharge port 26 and the jet water discharge by the jet water discharge port 32 by switching the valve. Alternatively, the washing water in the water storage tank may be in a form in which the rim water discharge by the rim water discharge port 26 and the jet water discharge by the jet water discharge port 32 are switched by switching only the pump.

Next, with reference to FIGS. 1 to 7, details of the rim water passage 24 and the rim spout 26 of the flush toilet 1 according to the first embodiment of the present invention will be described.
FIG. 4 is an enlarged partially enlarged plan view of a portion of the rim water passage formed inside the rim portion in the toilet bowl main body portion of the flush toilet according to the first embodiment of the present invention shown in FIG. Is a partially enlarged cross-sectional view of the rim portion along the VV line of FIG.
Further, FIG. 6A is a cross section A of the rim water passage shown in FIG. 4, and FIG. 6B is a cross section B of the rim water passage shown in FIG. Further, FIG. 6C is a C cross section of the rim water passage shown in FIG. 4, and FIG. 6D is a D cross section of the rim water passage shown in FIG. FIG. 6E is an E cross section of the rim water passage shown in FIG.

First, as shown in FIG. 4, the rim water passage 24 has an outer portion 24b extending forward from the inlet portion 24a connected to the headrace pipe 28 to the inside of the rim portion 18 and a downstream end of the outer portion 24b. It includes a bent portion 24c that bends inward, and an inner portion 24d that extends rearward from the bent portion 24c to the rim spout 26.

Further, as shown in FIGS. 5 and 6A to 6E, the maximum height H of the flow path cross section of the outer portion 24b and the bent portion 24c of the rim passage 24 is set, and the flow path cross section of the inner portion 24d of the rim passage 24 is set. The maximum height dimension h1 of each flow path cross section E of the inner portion 24d of the rim water passage 24 is the maximum of each flow path cross section A to C of the outer portion 24b of the rim water passage 24. The height dimensions H1 to H3 and the bent portion 24c are set to be smaller than the maximum height dimension H4 of the flow path cross section D.
In the flush toilet bowl 1 of the present embodiment, for example, the maximum height dimension h1 of the flow path cross section E of the inner portion 24d of the rim passage 24 and the downstream end (bending portion) of the outer portion 24b of the rim passage 24 The ratio (h1: H4) of the flow path cross section D of the (upstream end of 24c) to the maximum height dimension H4 is preferably set to 1: 2 to 1: 8, preferably 1: 2 to 1: 5. It is most preferably set to.
As a result, for example, in a flush toilet different from the present invention, in order to reduce the frictional resistance of the wall surface in the rim passage, the cross section of the flow path of the rim passage extends from the upstream end to the downstream end of the rim passage. In the flush stool 1 of the present embodiment, the rim water passage 24 and the rim spout, which are the rim water discharge portions, are compared with the rim water passage formed by the rim water passages having substantially the same circular cross section or the cross section having substantially the same aspect ratio in the entire area. The size such as the width of the entire rim portion 18 required for 26 can be effectively set small.
Therefore, the air space other than the washing water in the rim water passage 24 at the time of water flow can be reduced, and the rim water discharge by the rim water discharge port 26 can be efficiently performed.
In addition, it is possible to make it difficult for abnormal noise to be generated due to entrainment of air in the rim water passage 24 during water flow.
Further, by reducing the total volume space in the rim water passage 24, the space around the rim water passage 24 that bends from the outer portion 24b of the rim passage 24 to the inner portion 24d via the bending portion 24c is provided with a margin. Therefore, it is possible to suppress the pressure loss of the washing water in the rim water passage 24 and to secure the degree of freedom in designing the toilet bowl regarding the shape of the rim portion 18 of the bowl portion 20 and the like. ..

Next, as shown in FIG. 5, the outer side wall portion 24b of the rim water passage 24 is integrally formed with the outer wall portion 38 on the outer peripheral side of the rim portion 18 and the lower side wall formed integrally from the lower end of the outer wall portion 38 to the inside. The inner side wall portion 42 which faces the outer wall portion 38 in the horizontal direction and whose lower end is adhered to the upper end of the lower side wall portion 40, and the outer wall portion 42 which is integrally formed with the upper end of the inner side wall portion 42. It includes an upper side wall portion 44 that is adhered to the upper end of the portion 38.
Further, the adhesive surface S1 between the upper end surface of the lower side wall portion 40 of the outer side wall portion 24b of the rim water passage 24 and the lower end surface of the inner side wall portion 42 forms a substantially horizontal plane, and is above the upper end surface of the outer wall portion 38. The adhesive surface S2 with the side wall portion 44 forms an inclined surface inclined with respect to a substantially horizontal plane.
The term "substantially horizontal plane" as used herein means that not only a perfect horizontal plane but also the upper end surface (adhesive surface) of the lower side wall portion 40 and the lower end surface (adhesive surface) of the inner side wall portion 42 are displaced in the horizontal direction. It also includes a generally horizontal surface that can be formed.
As a result, for example, at the time of manufacturing the flush stool 1 of the present embodiment, the adhesive surface S1 at the lower end of the inner side wall portion 42 is adhered to the adhesive surface S1 at the upper end of the lower side wall portion 40 of the rim water passage 24 at the same time. When the adhesive surface S2 of the upper side wall portion 44 is adhered to the adhesive surface S2 of the upper end of the outer wall portion 38 of the rim water passage 24, the adhesive surface S1 of the lower side wall portion 40 and the adhesive surface of the inner side wall portion 42 form a horizontal plane. Even if S1 is displaced from each other in the horizontal direction due to a manufacturing error or the like, the adhesive surface S1 of the outer wall portion 38 and the adhesive surface S1 of the upper side wall portion 44 that form an inclined surface that is inclined with respect to the horizontal plane are still present. , It is possible to make reliable contact in advance.
Therefore, the flow path cross sections A to E from the outer side portion 24b to the inner side portion 24d in the rim water passage 24 are completely crushed by the displacement between the adhesive surface S1 of the lower side wall portion 40 and the adhesive surface S1 of the inner side wall portion 42. Since it is possible to prevent it from being stowed, it is possible to secure a water passage area of the rim water passage 24 over the entire area.

Next, with reference to FIGS. 4 and 7 to 10C, details of the water passage 30 formed in the vicinity of the downstream side of the rim spout 26 of the flush toilet bowl 1 according to the first embodiment of the present invention will be described.
FIG. 7 is a partially enlarged side surface portion of the flush toilet according to the first embodiment of the present invention shown in FIG. 2, in which a portion of the water passage near the downstream side of the rim spout is enlarged, and FIG. 8 is FIG. It is a cross-sectional view along the line VIII-VII, and FIG. 9 is a cross-sectional view taken along the line XI-XI of FIG.
Further, FIG. 10A shows the distance (x) from the rim spout to the downstream side in the circumferential direction and the height dimension of the overhang portion in the water passage near the downstream side of the rim spout of the flush toilet according to the first embodiment of the present invention. FIG. 10B is a diagram qualitatively showing the relationship with (U), and FIG. 10B is a circumferential downstream from the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the first embodiment of the present invention. FIG. 10C is a diagram qualitatively showing the relationship between the side distance (x) and the maximum height dimension (L) from the shelf surface to the lower end of the overhang portion, and FIG. 10C is a water wash according to the first embodiment of the present invention. The relationship between the distance (x) on the downstream side in the circumferential direction from the rim spout in the water passage near the downstream side of the rim spout of the toilet bowl and the width (W) of the water passage on the downstream side of the rim spout is qualitatively shown. It is a figure.

First, as shown in FIGS. 7 to 9, a water passage formed from the downstream end of the rim spout 26 to the bent portion 50 of the bowl portion 20 (details will be described later), that is, in the vicinity of the downstream side of the rim spout 26. 30 is formed by an inner peripheral surface 46 of the rim portion 18, a shelf surface 16 formed on the lower side of the inner peripheral surface 46 of the rim portion 18, and an overhang portion 48 formed on the upper side of the inner peripheral surface 46. A flow path cross section G is formed.
An overhang shape is formed only in the water passage 30 in the entire circumference of the rim portion 18, and the inner peripheral surface of the rim portion 18 excluding the water passage 30 is linear in the vertical direction in a cross section cut in the vertical direction. It is formed so as to extend to and does not have an overhang shape like the overhang portion 48.
Further, as shown in FIGS. 4 and 7 to 10C, the water passage 30 has a flow path cross section G so that the cross-sectional area A0 of the flow path cross section G becomes substantially constant from the rim spout 26 toward the downstream side. The maximum height dimension L is set larger toward the downstream side, and the width W is set smaller toward the downstream side.
That is, for example, with respect to the vertical minimum thickness U2 of the overhang portion 48 of the water passage 30 shown in FIG. 9, the water passage 30 shown in FIG. 8 has a cross-sectional area A0 of the flow path cross section G substantially constant. The overhang portion 48 is smaller than the minimum thickness U1 in the vertical direction.

Further, with respect to the maximum height dimension L2 in the vertical direction of the water passage 30 of the flow path cross section G2 shown in FIG. 9, the water passage 30 shown in FIG. 8 is provided so that the cross-sectional area A0 of the flow path cross section G is substantially constant. It is larger than the maximum height dimension L1 in the vertical direction of the flow path cross section G1.
Here, "the cross-sectional area A0 is almost constant" means not only completely constant, but also passes through the flow path cross section G of the water passage 30 on the downstream side of the rim spout 26 after water is discharged from the rim spout 26. The rim spout can flow downstream along the water passage 30 with suppressed turbulence, and can effectively form a stable swirling flow in the bowl portion 20 on the downstream side, including approximately constant. It's a rim.
Further, with respect to the width W2 of the flow path 30 of the flow path cross section G2 shown in FIG. 9, the water passage of the flow path cross section G1 of the flow path 30 shown in FIG. 8 so that the cross-sectional area A0 of the flow path cross section G is constant. It is smaller than the width W1 of 30.
Further, as shown in FIGS. 8 and 9, the height position P1 of the shelf surface 16 forming the flow path cross section G of the water passage 30 is substantially constant from the rim spout 26 toward the downstream side. It is formed to be.
Here, the "almost constant height position" is not only completely constant, but also passes through the flow path cross section G of the water passage 30 on the downstream side of the rim spout 26 after water is discharged from the rim spout 26. The rim spout can be suppressed from being disturbed and flow to the downstream side along the water passage 30, and a stable swirling flow can be effectively formed in the bowl portion 20 on the downstream side. It includes.

As a result, the rim water discharge that passes through the flow path cross section G of the water passage 30 after being discharged from the rim water discharge port 26 can be suppressed from being disturbed and can flow to the downstream side along the inside of the water passage 30, and is downstream. A stable swirling flow can be effectively formed in the bowl portion 20 on the side.
Further, with respect to the wash water discharged from the rim spout 26, by forming a stable flow on the downstream side along the water passage 30 on the downstream side thereof, it is possible to prevent the wash water from scattering, so that the bowl portion The visibility and cleanability of 20 can be effectively improved.

As shown in FIGS. 8 and 9, the minimum thickness U of the overhang portion 48 in the vertical direction, which is the minimum height dimension of the overhang portion 48 in the flow path cross section G of the water passage 30, and the minimum thickness U of the overhang portion 48 in the vertical direction and the shelf surface 16 are exceeded. The ratio (U: L) with the maximum height dimension L in the vertical direction of the water passage 30, which is the maximum height dimension to the lower end of the hang portion 48, is preferably set to 1: 6 to 6: 1. Most preferably, it is set to 1: 3 to 3: 1.

Further, as shown in FIG. 3, the inner peripheral wall of the rim portion 18 formed in the region on the right rear side in the bowl portion 20 and on the downstream side of the water passage 30 faces the downstream side in the circumferential direction from the rim spout 26. A curved portion 50 is formed in which the curvature (1 / ρ) changes from small to large (in other words, the radius of curvature ρ changes from large to small) according to the distance (x). That is, the curvature (1 / ρ) of the bent portion 50 changes at a constant rate from small to large in the plan view shown in FIG. 3 (in other words, the radius of curvature ρ changes at a constant rate from large to small. ) It is formed by a transition curve 52 such as a clothoid curve.
Similarly, as shown in FIG. 3, the inner peripheral wall of the rim portion 18 in the front region in the bowl portion 20 is also the rim portion 18 according to the distance (x) from the rim spout 26 toward the downstream side in the circumferential direction. The bending portion 54 is formed in which the curvature (1 / ρ) changes from small to large (in other words, the radius of curvature ρ changes from large to small) from the left rear side to the front. In the plan view shown in FIG. 3, the bending portion 54 has a clothoid whose curvature (1 / ρ) changes from small to large at a constant ratio (in other words, the radius of curvature ρ changes from large to small at a constant ratio). It is formed by a relaxation curve 56 such as a curve.
As a result, when the wash water discharged from the rim spout 26 first swirls along the curved portion 50, it is possible to effectively suppress the occurrence of a sudden change in centrifugal force with respect to the wash water. It is possible to improve the cleaning efficiency in the bowl portion 20.
Further, the washing water swirled along the bent portion 50 passes through the rear side region in the bowl portion 20 along the inner peripheral wall of the rim portion 18, swirls downstream in the circumferential direction, and then along the bent portion 54. The front side region in the bowl portion 20 is swiveled, and when the bent portion 54 is swiveled, it is possible to effectively suppress the occurrence of a sudden change in centrifugal force with respect to the washing water. It is possible to improve the cleaning efficiency in the bowl portion 20.
In the water-washing stool 1 of the present embodiment, a clothoid curve in which the curvature changes at a constant ratio is adopted for each of the transition curves 52 and 56 of the curved portions 50 and 54 formed by the inner peripheral wall of the rim portion 18. As the transition curve, a sine half-wavelength reduction curve or the like, which is a transition curve other than the clothoid curve, may be adopted.

Next, with reference to FIGS. 3 and 11 to 13B, the bent portions 50, 54 formed by the transition curves 52, 56 in the bowl portion 20 of the flush toilet bowl 1 according to the first embodiment of the present invention. The details of the above will be described.
Here, FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 3, and FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG.
Further, FIG. 13A shows a distance (x) on the downstream side in the circumferential direction from the rim spout when the straight portion and the curved portion of the bowl portion are connected by a relaxation curve in the flush toilet according to the first embodiment of the present invention. FIG. 13B is a diagram qualitatively showing the change in curvature (1 / ρ), and FIG. 13B is a comparative example with respect to the flush toilet according to the first embodiment of the present invention shown in FIG. 13A. It is a figure qualitatively showing the change of the distance (x) and the curvature (1 / ρ) on the downstream side in the circumferential direction from the rim spout when the curved part is connected by a curve tangent to a straight line.

First, as shown in FIGS. 3, 11 and 12, the bowl portion 20 forms a shelf surface 16 on the bent portions 50 and 54 formed by the transition curves 52 and 56, and the width W3 of the shelf surface 16 is W3. Is substantially constant along the circumferential direction of the bowl portion 20.
The term "almost constant" as used herein means not only completely constant, but also when the washing water discharged from the rim spout 26 of the rim water passage 24 turns along the shelf surface 16 of the bent portions 50 and 54. In addition, it includes a substantially constant value that can more effectively suppress the occurrence of a sudden change in centrifugal force with respect to the washing water.
Further, as shown in FIGS. 11 and 12, each shelf surface 16 of the bent portions 50 and 54 formed by the transition curves 52 and 56 of the bowl portion 20 has inclination angles α1 and α2 with respect to the horizontal plane, respectively. It is formed.
Here, the magnitude of the inclination angle α1 is preferably set to 0 ° to 15 °, and most preferably set to 2 ° to 8 °.
The size of the tilt angle α2 is set to be larger than the size of the tilt angle α1, preferably set to 3 ° to 60 °, and most preferably set to 5 ° to 30 °. ..
As a result, when the washing water discharged from the rim spout 26 swirls along the shelf surface 16 of the bent portions 50 and 54, it is more effective that a sudden change in centrifugal force is generated with respect to the washing water. Therefore, the cleaning efficiency in the bowl portion 20 can be improved better.

Further, as shown in FIG. 13A, in the flush stool 1 of the present embodiment, when the linear portion and the curved portion of the bowl portion 20 which are substantially linear are connected by a transition curve, the rim spout 26 is used. In the section where the distance x on the downstream side in the circumferential direction is from 0 to x1 (for example, x1 = 50 mm), a (for example, ρ1 = 800 mm, a = 1 / ρ1 = 0.00125 [1 /]) having a constant curvature 1 / ρ mm]), which is a section forming a straight portion that is almost linear.
Next, as shown in FIG. 13A, in the section where the distance x is from x1 to x2 (for example, x2 = 200 mm), the curvature 1 / ρ is a to b (for example, ρ1 = 800 mm, a = 1 / ρ1 = 0). It is a section (alignment curve section) in which a curved portion is formed by a transition curve that changes at a constant ratio from .00125, ρ2 = 150 mm, b = 1 / ρ2 = 0.00667 [1 / mm]).
Further, as shown in FIG. 13A, in the section where the distance x is from x2 to x3 (for example, x3 = 380 mm), b (for example, ρ2 = 150 mm, b = 1 / ρ2 = 0. 0667 [1 / mm]), which is a section forming a bent portion having a substantially constant curvature.

On the other hand, as shown in FIG. 13B, in the comparative example in which the straight portion and the curved portion of the bowl portion are connected by a curve tangent to the straight line, the curvature 1 / ρ is 0 (curvature) before and after the distance x becomes x4. By abruptly changing from radius ρ = ∞) to c (curvature radius ρ = ρ3), when the wash water discharged from the rim spout is swirled along the shelf surface of the bend, it is relative to the wash water. A sudden change in the centrifugal force will occur more than the water-washing stool 1 of the present embodiment, and the cleaning efficiency in the bowl portion will decrease.

Next, the operation of the flush toilet bowl 1 according to the first embodiment of the present invention described above will be described.
First, according to the flush stool 1 according to the first embodiment of the present invention, the water passage 30 formed in the vicinity of the downstream side of the rim spout 26 is the inner peripheral surface 46 of the rim portion 18, and the inside of the rim portion 18. The flow path cross section G is formed by the shelf surface 16 formed on the lower side of the peripheral surface 46 and the overhang portion 48 formed on the upper side of the inner peripheral surface 46 of the rim portion 18, and the water passage 30 is formed. The maximum height dimension L of the flow path cross section G is set larger toward the downstream side and the flow path cross section is set so that the cross-sectional area A0 of the flow path cross section G becomes substantially constant from the rim spout 26 toward the downstream side. Since the width W of G is set smaller toward the downstream side, the rim water discharge that passes through the flow path cross section G of the water passage 30 on the downstream side of the rim water discharge port 26 after the water is discharged from the rim water discharge port 26 is disturbed. This can be suppressed and flow to the downstream side along the water passage 30, and a stable swirling flow can be effectively formed in the bowl portion 20 on the downstream side.
Further, with respect to the wash water discharged from the rim spout 26, by forming a stable flow on the downstream side along the water passage 30 on the downstream side thereof, it is possible to prevent the wash water from scattering, so that the bowl portion The visibility and cleanability of 20 can be effectively improved.

Next, according to the flush toilet bowl 1 according to the present embodiment, the height position P1 of the shelf surface 16 forming the flow path cross section G of the water passage 30 formed on the downstream side of the rim spout 26 is the rim spout. Since it is formed so as to be at a substantially constant height position from 26 toward the downstream side, the flow path cross section G of the water passage 30 on the downstream side of the rim spout 26 after water is discharged from the rim spout 26. The rim water discharged passing through the water can flow to the downstream side along the inside of the water passage 30 without being disturbed, and a stable swirling flow can be more effectively formed on the downstream side.
Further, with respect to the wash water discharged from the rim spout 26, by forming a stable flow on the downstream side along the water passage 30 on the downstream side thereof, it is possible to prevent the wash water from scattering, so that the bowl portion The visibility and cleanability of 20 can be improved more effectively.

Further, according to the flush toilet bowl 1 according to the present embodiment, from the minimum height dimension U of the overhang portion 48 in the flow path cross section G of the water passage 30 formed on the downstream side of the rim spout 26 and the shelf surface 16. Since the ratio (U: L) with the maximum height dimension L to the lower end of the overhang portion 48 is set to 1: 2 to 1: 8, water is discharged from the rim spout 26 and then the rim is discharged. The rim water discharge that passes through the flow path cross section G of the water passage 30 on the downstream side of the water port 26 is suppressed from being disturbed and can flow to the downstream side along the inside of the water passage 30, so that a stable swirling flow is generated on the downstream side. It can be formed even more effectively.
Further, with respect to the wash water discharged from the rim spout 26, by forming a stable flow on the downstream side along the water passage 30 on the downstream side thereof, it is possible to prevent the wash water from scattering, so that the bowl portion The visibility and cleanability of 20 can be improved even more effectively.

Next, the flush toilet according to the second embodiment of the present invention will be described with reference to FIGS. 14 to 16C.
FIG. 14 is a cross-sectional view similar to FIG. 8 in the water passage on the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention, and FIG. 15 is a water wash according to the second embodiment of the present invention. It is a cross-sectional view similar to FIG. 9 in the water passage on the downstream side of the rim spout of the toilet bowl.
Further, FIG. 16A shows the distance (x) on the downstream side in the circumferential direction from the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention, and the height dimension of the overhang portion. It is a figure which qualitatively showed the relationship with (U).
Further, FIG. 16B shows the distance (x) from the rim spout to the downstream side in the circumferential direction and the overhang portion from the shelf surface in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. It is a figure which qualitatively showed the relationship with the maximum height dimension (L) to the lower end.
Further, FIG. 16C shows the distance (x) from the rim spout to the downstream side in the circumferential direction and the downstream side of the rim spout in the water passage near the downstream side of the rim spout of the flush toilet according to the second embodiment of the present invention. It is a figure which qualitatively showed the relationship with the width (W) of a water passage.
Here, in the flush toilet according to the second embodiment of the present invention shown in FIGS. 14 to 16C, the same portion as the portion of the flush toilet according to the first embodiment of the present invention shown in FIGS. 8 to 10C is the same. Reference numerals are given, and these description will be omitted.

As shown in FIGS. 14 to 16C, in the flush toilet bowl 100 according to the second embodiment of the present invention, the water passage 130 formed in the vicinity of the downstream side of the rim spout 26 is formed on the inner peripheral surface 146 of the rim portion 118. The flow path cross section G is formed by the shelf surface 116 formed on the lower side of the inner peripheral surface 146 of the rim portion 118 and the overhang portion 148 formed on the upper side of the inner peripheral surface 46.
Further, for the water passage 130, the maximum height dimension L of the flow path cross section G is set larger toward the downstream side so that the cross-sectional area A0 of the flow path cross section G becomes substantially constant from the rim spout 26 toward the downstream side. At the same time, the width W of the flow path cross section G is set smaller toward the downstream side.
That is, in the flush toilet 100 according to the second embodiment of the present invention, the height position P101 of the overhang portion 148 forming the flow path cross section G of the water passage 130 near the downstream side of the rim spout 26 is the rim spout 26. The shelf surface 16 forming the flow path cross section G of the water passage 30 in the flush toilet bowl 1 according to the first embodiment of the present invention in that it is formed so as to be at a substantially constant height position toward the downstream side from the rim. The height position P1 of the toilet is different from the structure formed so as to be a substantially constant height position from the rim spout 26 toward the downstream side.
The "almost constant height position" here means not only a completely constant position but also a cross section G of the flow path 130 of the water passage 130 on the downstream side of the rim spout 26 after water is discharged from the rim spout 26. The passing rim spout can flow downstream along the water passage 130 while suppressing turbulence, and can effectively form a stable swirling flow in the bowl portion on the downstream side, including approximately constant. It's a rim.
Further, as shown in FIGS. 14 to 16C, in the water passage 130 of the flush toilet 100 according to the second embodiment of the present invention, the cross-sectional area A0 of the flow path cross section G from the rim spout 26 toward the downstream side is The maximum height dimension L of the flow path cross section G is set larger toward the downstream side and the width W of the flow path cross section G is set smaller toward the downstream side so as to be substantially constant.
That is, for example, with respect to the vertical minimum thickness U (U101, U102) of the overhang portion 148 of the water passage 130 shown in FIGS. 14 and 15, the cross-sectional area A0 of the flow path cross section G (G101, G102) is substantially constant. The thickness is set to be substantially constant (U = U101 = U102) so as to be.
Further, with respect to the maximum height dimension L102 in the vertical direction of the water passage 130 of the flow path cross section G102 shown in FIG. 15, the water passage 130 shown in FIG. 14 is provided so that the cross-sectional area A0 of the flow path cross section G is substantially constant. It is larger than the maximum height dimension L101 in the vertical direction of the flow path cross section G101.
Further, regarding the width W102 of the water passage 130 of the flow path cross section G102 shown in FIG. 15, the water passage of the flow path cross section G101 of the flow path 130 shown in FIG. 14 so that the cross-sectional area A0 of the flow path cross section G is constant. It is smaller than the width W101 of 130.

According to the flush stool 100 according to the second embodiment of the present invention described above, the height position P101 of the overhang portion 148 forming the flow path cross section G of the water passage 130 formed on the downstream side of the rim spout 26 is , It is formed so as to be at a constant height position from the rim spout 26 toward the downstream side, and the maximum height dimension L of the flow path cross section G of the water passage 130 is set larger toward the downstream side. Since the width W of the water passage 130 is set smaller toward the downstream side, the rim water discharge that passes through the flow path cross section G of the water passage 130 on the downstream side of the rim water discharge port 26 after the water is discharged from the rim water discharge port 26 The turbulence is suppressed and the flow can flow to the downstream side along the inside of the water passage 130, and a stable swirling flow can be more effectively formed on the downstream side.
Further, with respect to the wash water discharged from the rim spout 26, by forming a stable flow on the downstream side along the water passage 130 on the downstream side thereof, it is possible to prevent the wash water from scattering, so that the bowl portion The visibility and cleanability of 20 can be improved more effectively.

Next, with reference to FIG. 17, the flush toilet bowl according to the third embodiment of the present invention will be described.
FIG. 17 is a schematic cross-sectional view schematically showing a cross-sectional portion (a cross-sectional portion of the rim spout and the flow path of the water passage on the downstream side thereof) near the rim spout in the flush toilet according to the third embodiment of the present invention. is there.
Here, in the toilet bowl body portion of the flush toilet bowl according to the third embodiment of the present invention shown in FIG. 17, the same reference numerals are given to the same portion as the toilet bowl body portion of the flush toilet bowl 1 according to the first embodiment of the present invention. These explanations will be omitted.
In FIG. 17, as a comparative example with respect to the flush toilet bowl 200 according to the third embodiment of the present invention, a chain wire is provided for the shapes of the rim spout 26 and the overhang portion 48 of the flush toilet bowl 1 according to the first embodiment of the present invention. It is shown by.

As shown in FIG. 17, in the flush toilet bowl 200 according to the third embodiment of the present invention, the opening cross section E200 of the rim spout 226 is formed in a triangular shape, and the overhang of the triangular rim spout 226 is formed. The hypotenuse 226a, which is one side of the portion 248 side, forms a part of the overhang portion 248.
As a result, in the rim spout 226 of the flush toilet 200 according to the third embodiment of the present invention, for example, the opening cross section E1 of the flush toilet 1 according to the first embodiment of the present invention shown in FIG. 17 is formed into a rectangular shape. The third embodiment of the present invention is compared with the rim spout 26 which has substantially the same width as the maximum width of the opening cross section E200 of the triangular rim spout 226 of the flush toilet 200 according to the third embodiment of the present invention. With respect to the region of the overhang portion 248 above the water passage 230 on the downstream side of the rim spout 226 of the flush toilet 200 according to the first embodiment of the present invention, the downstream passage of the rim spout 26 of the flush toilet 1 according to the first embodiment of the present invention. It can be made smaller than the area of the overhang portion 48 above the water channel 30.

According to the flush toilet bowl 200 according to the third embodiment of the present invention described above, the opening cross section E200 of the rim spout 226 is formed in a triangular shape, so that the water passage 230 on the downstream side of the rim spout 226 is above. The area of the overhang portion 248 can be reduced, and after water is discharged from the rim spout 226, the rim spout passing through the flow path cross section of the water passage 230 on the downstream side of the rim spout 226 may be disturbed. It can be suppressed and flow to the downstream side along the inside of the water passage 230, and a stable swirling flow can be formed on the downstream side even more effectively.
Further, with respect to the washing water discharged from the rim spout 226, by forming a stable flow on the downstream side along the water passage 230 on the downstream side thereof, it is possible to prevent the washing water from scattering, so that the bowl portion The visibility and cleanability of the bowl can be improved even more effectively.

1 Water-washing toilet bowl according to the first embodiment of the present invention 2 Toilet bowl body 4 Toilet seat 6 Toilet lid 8 Functional part 10 Sanitary cleaning system functional part 12 Water supply system functional part 14 Waste receiving surface 16 Shelf surface 18 Rim part 20 Bowl part 22 Drain trap Pipeline (drainage channel)
22a Inlet 22b Ascending pipe 22c Top 22d Downing pipe 24 Rim water passage (rim water discharge part)
24a Rim waterway inlet 24b Rim waterway outer side 24c Rim waterway bend 24d Rim waterway inner side 26 Rim spout (rim water spout)
28 Water pipe (waterway)
30 Waterway near the downstream side of the rim waterway 32 Jet waterway 34 Water storage tank 36 Pressurized pump 38 Outside wall of the outside of the rim waterway 40 Lower side wall of the outside of the rim waterway 42 Outside of the rim waterway Inner side wall of the part 44 Upper side wall part of the outer part of the rim water passage 46 Inner peripheral surface of the rim part 48 Overhang part 50 Bending part 52 Relaxing curve 54 Bending part 56 Relaxing curve 100 Washing with water according to the second embodiment of the present invention Toilet 116 Shelf surface 130 Water passage near the downstream side of the rim spout 146 Inner peripheral surface of the rim 148 Overhang 200 Washing stool according to the third embodiment of the present invention 218 Rim 226 Rim spout 226a Slope 248 Overhang A Cross section of the outer channel of the rim channel A0 Cross section of the channel section of the channel near the downstream side of the rim spout B Cross section of the channel outside the rim channel C Outer flow path cross section C1 Center line extending in the left-right direction that divides the bowl into two equal parts in the front-back direction D Flow path cross section at the bend of the rim water passage E Flow flow cross section at the inner part of the rim water passage E1 Rim spout Opening section E200 Opening section of the rim spout F1 Front side area of the bowl G Channel section of the water passage near the downstream side of the rim spout H Maximum height dimension of the channel cross section of the outer part of the rim spout and the bent part H1 Maximum height dimension of the channel cross section A on the outer side of the rim channel H2 Maximum height dimension of the channel section B on the outside of the rim channel H3 Maximum height of the channel section C on the outside of the rim channel Dimensions H4 Maximum height of channel cross section D at the bend of the rim channel h Maximum height of channel section inside the rim channel h1 Maximum height of channel section E inside the rim channel Dimensions Maximum height of the waterway near the downstream side of the L rim spout (maximum height from the shelf surface of the waterway to the lower end of the overhang)
Maximum height dimension of the water passage near the downstream side of the L1 rim spout (maximum height dimension from the shelf surface of the water passage to the lower end of the overhang)
Maximum height dimension of the water passage near the downstream side of the L2 rim spout (maximum height dimension from the shelf surface of the water passage to the lower end of the overhang)
P1 Height position of the shelf surface of the water passage near the downstream side of the rim spout P101 Height position of the overhang that forms the water channel near the downstream side of the rim spout R1 Rear area of the bowl S1 Rim water passage Adhesion surface between the upper end surface of the lower side wall of the outer side and the lower end surface of the inner side wall S2 Adhesion surface between the upper end surface of the outer wall of the outer side of the rim water passage and the upper side wall U Vertical direction of the overhang part Minimum thickness (minimum height dimension of overhang part)
U1 Minimum thickness of overhang in the vertical direction (minimum height of overhang)
Minimum thickness of U2 overhang in the vertical direction (minimum height of overhang)
W Width of the water passage near the downstream side of the rim spout W1 Width of the water passage near the downstream side of the rim spout W2 Width of the water passage near the downstream side of the rim spout W3 Width of the shelf surface x From the rim spout Circumferential downstream distance x1 Circumferential downstream distance from rim spout x2 Circumferential downstream distance from rim spout x3 Circumferential downstream distance from rim spout α1 Shelf tilt angle α2 Shelf Face inclination angle ρ Relaxation curve radius of curvature ρ1 Relaxation curve radius of curvature ρ2 Relaxation curve radius of curvature ρ3 Radiation radius

Claims (5)

A water-washing toilet that is washed by the washing water supplied from the washing water source and discharges filth.
A bowl portion having a bowl-shaped waste receiving surface and a rim portion formed on the upper edge of the waste receiving surface,
A drainage channel that is connected to the bottom of this bowl and discharges filth,
A rim water spouting portion provided on the rim portion and spouting washing water into the bowl portion to form a swirling flow.
It has a headrace that supplies the washing water supplied from the washing water source to the rim water discharge portion.
The bowl portion includes a front side region which is a front side and a rear side region which is a rear side with respect to a center line extending in the left-right direction which bisects the bowl portion in the front-rear direction.
The rim water discharge portion forms a rim water passage through which the washing water supplied from the headrace can pass through the rim portion on either the left or right side in the front side region of the bowl portion, and the rim. A rim spout is formed at the downstream end of the water passage to discharge the wash water backward.
The water passages formed on the downstream side of the rim spout are located on the inner peripheral surface of the rim portion, the shelf surface formed on the lower side of the inner peripheral surface of the rim portion, and the upper side of the inner peripheral surface. A flow path cross section is formed by the formed overhang portion, and the flow path cross section is formed.
In the water passage, the height dimension of the flow path is set larger toward the downstream side so that the cross-sectional area of the flow path cross section becomes substantially constant from the rim spout toward the downstream side. A flush toilet that is characterized in that its width is set smaller toward the downstream side. The flush toilet according to claim 1, wherein the shelf surface forming the flow path cross section is formed so that the height position thereof is substantially constant from the rim spout to the downstream side. The flush toilet according to claim 1, wherein the overhang portion forming the cross section of the flow path is formed so that the height position thereof is substantially constant from the rim spout to the downstream side. .. The ratio (U: L) of the minimum height dimension (U) of the overhang portion in the flow path cross section to the maximum height dimension (L) from the shelf surface to the lower end of the overhang portion is 1: 6. The flush toilet according to any one of claims 1 to 3, which is set to ~ 6: 1. The rim spout has an opening cross section formed in a triangular shape, and one side of the triangular rim spout forms an overhang portion according to any one of claims 1 to 4. Washing toilet bowl.

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