JP2021105335A - Flush toilet bowl - Google Patents

Abstract

To prevent air entrapment of cleaning water in the water channel, especially at the bend part, during water discharge, resulting in strong cleaning power of the rim spout.SOLUTION: There is provided a flush toilet bowl that is washed by wash water supplied from a wash water source and discharges waste, in which the rim channel of the rim spout includes an outer part that extends forward from the entrance part inside the rim part, a bend part that bends inward from the downstream end of this outer part, and an inner part that extends rearward from this bend part to the rim spout. The radius of curvature of the bottom surface of the bend part is larger than the radius of curvature of the bottom surface of the outer part. It has become possible to reduce the scattering of wash water and maintain the target discharge direction toward the bottom of the bowl by including a water passage with an overhang formed near the downstream side of the rim spout.SELECTED DRAWING: Figure 1

Description

The present invention relates to a flush urinal, and more particularly to a flush urinal that is washed with wash water supplied from a wash water source and discharges filth.

Conventionally, as a flush toilet that is washed by wash water supplied from a wash water source and discharges filth, for example, as described in Patent Document 1, the intermediate in the front-rear direction at the rim portion on the side of the bowl portion. It is known that a spout (rim spout) for discharging water rearward is arranged in a region or a region behind the region.
In such a flush toilet, a water passage (rim water passage) to which wash water is supplied from the headrace on the rear side of the bowl portion is formed inside the rim portion on one side in the left-right direction of the bowl portion. This rim water passage is formed along the shape of the rim portion in the circumferential direction from the rim portion near the front end portion of the bowl portion to the water discharge port (rim water discharge port) of the rim portion on the other side in the left-right direction of the bowl portion. Has been done.

Further, as described in Patent Document 2, the water spout (rim spout) is arranged in the front region of the rim portion on the side of the bowl portion, and the spout (spout spout (rim spout) from the washing water source on the rear side of the bowl portion. The wash water pipeline extends in the front-rear direction to the rim spout), and the flush toilet is designed to discharge the wash water supplied from the wash water source to the spout via the wash water conduit to the rear. Has been done.

Japanese Patent No. 5592617 (Japanese Unexamined Patent Publication No. 2010-255316) Japanese Unexamined Patent Publication No. 2000-265525

However, in the conventional flush toilet described in Patent Document 1 described above, the rim water passage passes through the rim portion near the front end portion of the bowl portion to the water outlet of the rim portion on the other side in the left-right direction of the bowl portion. Since the rim portion is formed along the circumferential shape of the rim portion, the total length of the rim passage is increased, so that the volume space of the entire rim passage is also large, and the rim passage is filled with water. The air space other than the wash water also becomes large.
Therefore, the larger the volume space in the entire rim passage, the longer it takes to fill the rim passage, and the longer it takes to supply the specified flow rate of wash water from the spout. There is a problem that the efficiency of rim water spouting from the spout may be reduced.
In addition, there is also a problem that abnormal noise is likely to be generated due to entrainment of air in the rim water passage during water flow.
Further, since the rim water passage is formed near the front end portion of the bowl portion, there is a problem that the degree of freedom in designing the toilet bowl regarding the shape of the bowl portion and the rim portion of the toilet bowl may be reduced.

Similarly, also in the conventional flush toilet described in Patent Document 2 described above, the wash water pipeline extends in the front-rear direction from the wash water source on the rear side of the bowl portion to the water spout (rim spout). , The total length of the washing water pipe becomes longer, and the volume space of the entire washing water pipe also becomes larger accordingly.
Therefore, it takes a long time for the washing water passing through the washing water pipe to fill the water passage, and it takes time for the washing water to reach a predetermined flow rate. Therefore, the rim spouting water is discharged from the spout (rim spouting port). There is a problem that efficiency may be reduced. In addition, there is a problem that abnormal noise is likely to be generated due to entrainment of air in the washing water pipeline during water flow, and a water spout (rim spout) is arranged in the front region of the rim portion on the side of the bowl portion. As a result, there is a problem that the degree of freedom in designing the toilet bowl regarding the shape of the bowl portion and the rim portion of the toilet bowl may be reduced.

The U-turn type (frontward placement of the spout, rearward water discharge) flush urinal has a greater bend than the conventional one-spout type (rearward placement of the spout, frontward spout) flush urinal, and is located near the spout. There is a problem that the scattering of the washing water becomes large. One of the causes of this scattering is considered to be the entrainment of wash water in the headrace, especially at the bent portion, at the time of water discharge.

The present invention has been made to solve the above problems, and suppresses the entrainment of washing water in the headrace, especially at the bent portion, and reduces the scattering of washing water in the vicinity of the spout. As a result, strong detergency is realized in the rim water discharge.

According to the invention according to claim 1 in order to achieve the above object, it is a water-washing stool that is washed by washing water supplied from a washing water source and discharges filth, and has a bowl-shaped filth receiving surface and the filth. A bowl portion provided with a rim portion formed on the upper edge of the receiving surface, a drainage channel connected below the bowl portion to discharge filth, and a drainage channel provided on the rim portion to allow washing water to be poured into the bowl portion. It has a rim water discharge part that discharges water to form a swirling flow, and a headrace that supplies the wash water supplied from the wash water source to the rim water discharge part. The rim water discharge parts are on the left and right sides of the bowl part. A rim water passage through which the washing water supplied from the headrace can pass is formed in the rim portion on either side, and a rim discharge water is discharged to the downstream end of the rim water passage toward the rear. The rim water passage forms a water port, and the rim water passage has an outer portion extending forward from the inlet portion inside the rim portion, a bent portion that bends inward from the downstream end of the outer portion, and a rear portion from the bent portion. It is provided with an inner portion extending toward the rim spout, and the radius of curvature of the bottom surface of the bent portion is configured to be larger than the radius of curvature of the bottom surface of the outer portion, and an overhang is formed in the vicinity of the downstream side of the rim spout. By providing the water passage, it is possible to reduce the scattering of the washing water, and as a result, it is possible to realize the rim water discharge having a strong washing power.

According to the present invention, it is possible to suppress the entrainment of the washing water in the headrace, particularly at the bent portion at the time of water discharge, and it is possible to suppress the splashing of water and the pressure loss of the rim water discharge. be.

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 were 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. It is a partial plan view which shows the toilet bowl main body part of the flush toilet bowl by 1st Embodiment of this 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. 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 first 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 first embodiment of the present invention. ) 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 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. FIG. 5 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 second embodiment of the present invention. 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 by the 3rd Embodiment of this invention. FIG. 5 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 fourth embodiment of the present 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 guide pipe 28, which is a water guide that supplies the wash water supplied from the water supply (not shown), which is the wash 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 washing water source, 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 wash 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, with respect to the washing water directly supplied only from the water supply, even 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 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 water passage 24 is set, and the flow path cross section of the inner portion 24d of the rim water 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 of the flow path cross sections 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 water-washing stool 1 of the present embodiment, the rim water passage 24 and the rim spout, which are rim water discharge portions, are compared with the rim water passage formed by a circular cross section or a cross section having almost 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. ..
The rim water passage 24 has an outer portion 24b that extends forward from the inlet portion inside the rim portion, a bent portion 24c that bends inward from the downstream end of the outer portion, and a bent portion toward the rear from the bent portion. It is provided with an inner portion 24d extending to the rim spout. Although not shown, the bottom surface of the outer portion 24b and the bottom surface of the bent portion 24c may be convex downward so that the height thereof decreases from both ends toward the vicinity of the central portion. In this case, the radius of curvature of the bottom surface of the outer portion 24b and the radius of curvature of the bottom surface of the bent portion 24c are configured such that the radius of curvature of the bottom surface of the bent portion is larger than the radius of curvature of the bottom surface of the outer portion. In this way, the "radius of curvature of the bottom surface of the bent portion" is configured to be larger than the "radius of curvature of the bottom surface of the outer portion" to prevent entrainment due to leftover air. As a result, it is possible to reduce the scattering and abnormal noise of the washing water in the vicinity of the spout, and it is possible to realize the rim water spouting having a strong washing power.

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 is provided with 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 substantially horizontal plane referred to here is 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 can be displaced from each other in the horizontal direction. , Also includes an approximately horizontal surface.
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 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, near 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. A curved 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 to the downstream side in the circumferential direction, and then swirls 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 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 is generated more than the water-washing stool 1 of the present embodiment, and the cleaning efficiency in the bowl portion is lowered.

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 rim spouting portion provided on the rim portion 18 of the bowl portion 20 and spouts the washing water into the bowl portion 20 to form a swirling flow. A rim water passage 24 through which the wash water supplied from the water guide pipe 28 passes is formed inside the rim portion 18 on the right side in the front side region F1 of the bowl portion 20, and the rim water passage 24 is washed at the downstream end. A rim spout 26 is formed to discharge water rearward, and the rim water passage 24 extends forward from the inlet portion 24a to the inside of the rim portion 18 toward the outer portion 24b and the downstream end of the outer portion 24b. By providing the bent portion 24c that bends inward from the rim and the inner portion 24d that extends rearward from the bent portion 24c to the rim spout 26, the volume space in the entire rim water passage 24 can be reduced. ..
Therefore, when the wash water is supplied from the water pipe 28 into the rim water passage 24, it can be quickly filled with the wash water that passes through the volume space in the rim water passage 24. 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 prevent the generation of abnormal noise due to entrainment of air in the rim water passage 24 during water flow.
Further, a rim water passage is formed along the shape of the rim portion in the circumferential direction from the rim portion 18 near the front end portion of the bowl portion 20 to the spout of the rim portion 18 on the other side in the left-right direction of the bowl portion 20. Compared with the case, it is possible to secure the degree of freedom in designing the toilet bowl regarding the shape and the like of the rim portion 18 near the front end portion of the bowl portion 20.

Next, according to the flush stool 1 according to the present embodiment, the height dimension h1 of the flow path cross section E of the inner portion 24d of the rim passage 24 is the flow path of the outer portion 24b and the bent portion 24c of the rim passage 24. Since the height dimensions of the cross sections A to D are set to be smaller than the height dimensions H1 to H4, for example, in order to reduce the frictional resistance of the wall surface in the rim water passage, the cross section of the flow path of the rim water passage is rim. The rim portion required for the rim water passage 24 and the rim spout 26 as compared with the rim water passage formed by a cross section having substantially the same circular cross section or a cross section having substantially the same aspect ratio in the entire area from the upstream end to the downstream end of the water passage. The size such as the overall width of 18 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 performed more efficiently.
In addition, it is possible to prevent the generation of abnormal noise due to entrainment of air in the rim water passage 24 during water flow.
Further, a rim water passage is formed along the shape of the rim portion in the circumferential direction from the rim portion 18 near the front end portion of the bowl portion 20 to the spout of the rim portion 18 on the other side in the left-right direction of the bowl portion 20. Compared with the case, it is possible to secure the degree of freedom in designing the toilet bowl regarding the shape and the like of the rim portion 18 near the front end portion of the bowl portion 20.

Further, according to the flush stool 1 according to the present embodiment, the height dimension h of the flow path cross section E of the inner portion 24d of the rim passage 24 and the downstream end (bending portion 24c) of the outer portion 24b of the rim passage 24 Since the ratio (h: H) to the height dimension H at the upstream end) is set to 1: 2 to 1: 8, for example, in order to reduce the frictional resistance of the wall surface in the rim water passage, etc. The rim passage 24 has a cross section of the rim passage from the upstream end to the downstream end of the rim passage, as compared with a rim passage formed by a substantially same circular cross section or a cross section having substantially the same aspect ratio. The size of the entire width of the rim portion 18 required for the rim spout 26 and the rim spout 26 can be set smaller more effectively.
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 performed more efficiently.
In addition, it is possible to prevent the generation of abnormal noise due to entrainment of air in the rim water passage 24 during water flow.
Further, a rim water passage is formed along the shape of the circumferential direction of the rim portion through the rim portion 18 near the front end portion of the bowl portion 20 to the spout of the rim portion 18 on the other side in the left-right direction of the bowl portion 20. Compared with the case, by reducing the volume space of the entire rim passage 24, there is a space around the rim passage 24 that bends from the outer portion 24b of the rim passage 24 to the inner portion 24d via the bending portion 24c. Therefore, the pressure loss of the washing water in the rim water passage 24 can be suppressed, and the degree of freedom in designing the toilet bowl regarding the shape of the rim portion 18 near the front end portion of the bowl portion 20 can be ensured. can.

Further, according to the flush toilet bowl 1 according to the present embodiment, the outer side 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 from the lower end of the outer wall portion 38 to the inside. The lower side wall portion 40 is formed integrally with the lower side wall portion 40, 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 upper end of the inner side wall portion 42. An upper side wall portion 44 that is adhered to the upper end of the outer wall portion 38 is provided, and the adhesive surface S1 between the lower side wall portion 40 and the inner side wall portion 42 forms a substantially horizontal plane, and the outer wall portion 38 and the upper side wall portion 38 and the upper side 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.
Therefore, for example, at the time of manufacturing a toilet bowl, 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, and at the same time, the outer wall portion 38 of the rim water passage 24 is adhered. When the adhesive surface S2 of the upper side wall portion 44 is adhered to the adhesive surface S2 at the upper end of the above, the adhesive surface S1 of the lower side wall portion 40 forming a substantially horizontal plane and the adhesive surface S1 of the inner side wall portion 42 are due to manufacturing errors or the like. When they try to deviate from each other in the horizontal direction, the adhesive surface S1 of the outer wall portion 38 and the adhesive surface S1 of the upper side wall portion 44, which form inclined surfaces inclined to each other with respect to a substantially horizontal plane, come into contact with each other in advance. be able to.
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 mutual 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 the rim water passage 24 from being damaged, the water flow area of the rim water passage 24 can be secured over the entire area.

Next, the flush toilet according to the second embodiment of the present invention will be described with reference to FIG.
FIG. 14 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 second embodiment of the present invention.
Here, in the toilet bowl body portion of the flush toilet bowl according to the second embodiment of the present invention shown in FIG. 14, the same portion as the toilet bowl body portion of the flush toilet bowl 1 according to the first embodiment of the present invention shown in FIG. 4 is the same. The reference numerals are given, and these explanations will be omitted.

First, as shown in FIG. 4, in the flush stool 1 according to the first embodiment of the present invention, an overhang portion is formed above the water passage 30 formed in the vicinity of the downstream side of the rim water discharge port 26 of the rim water passage 24. The wall portion 58 on the inner peripheral side of the rim portion 18 forming the inner portion 24d of the rim passage 24, which forms 48, has a smaller region of the overhang portion 48 that covers the water passage 30 on the downstream side thereof. The thickness t1 is substantially constant from the upstream side of the inner portion 24d of the rim water passage 24 toward the rim spout 26.
On the other hand, in the flush toilet 100 according to the second embodiment of the present invention shown in FIG. 14, the inner portion 24d of the rim water passage 24 is formed as compared with the flush toilet 1 according to the first embodiment of the present invention. The wall portion 158 on the inner peripheral side of the rim portion 118 has a thickness t101 from the upstream side of the inner portion 24d of the rim passage 24 so that the region of the overhang portion 148 covering the water passage 130 on the downstream side thereof becomes smaller. It has a structure different from that of the wall portion 58 on the inner peripheral side of the rim portion 18 of the flush toilet bowl 1 according to the first embodiment of the present invention in that it is formed so as to narrow toward the rim spout 26.

According to the flush stool 100 according to the second embodiment of the present invention described above, the water passage 130 on the downstream side of the inner peripheral wall portion 158 of the rim portion 118 forming the inner portion 24d of the rim passage 24 is provided. The thickness t101 is formed so as to narrow from the upstream side of the inner portion 24d of the rim water passage 24 toward the rim spout 26 so that the area of the overhang portion 148 that covers the rim water passage 24 becomes smaller. Since the space around the rim water passage 24 that bends from the outer side portion 24b to the inner side portion 24d via the bent portion 24c can be provided with a margin, the pressure loss of the washing water in the rim passage 24 can be suppressed. At the same time, it is possible to secure the degree of freedom in designing the toilet bowl regarding the shape of the rim water passage 24 and the rim water discharge port 26, which are the rim water discharge portions.
Further, it is possible to suppress the splashing of water and the pressure loss of the rim water discharge due to the rim water discharge discharged from the rim water discharge port 26 coming into contact with the overhang portion 148.

Next, with reference to FIG. 15, the flush toilet according to the third embodiment of the present invention will be described.
FIG. 15 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. be.
Here, in the toilet bowl body portion of the flush toilet bowl according to the third embodiment of the present invention shown in FIG. 15, 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. 15, as a comparative example with respect to the flush toilet 200 according to the third embodiment of the present invention, a chain line is provided for the shapes of the rim spout 26 and the overhang portion 48 of the flush toilet 1 according to the first embodiment of the present invention. It is shown by.

As shown in FIG. 15, 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, 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. 15 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 the space around the rim passage 24 that bends from the outer portion 24b of the rim passage 24 to the inner portion 24d via the bending portion 24c can be provided. ..
Further, by reducing the area of the overhang portion 248 above the water passage 230 on the downstream side of the rim spout 226, the water discharged from the rim spout 226 comes into contact with the overhang portion 248. It is possible to suppress splattering and pressure loss of rim water discharge.

Next, with reference to FIG. 16, the flush toilet bowl according to the fourth embodiment of the present invention will be described.
FIG. 16 is a partially enlarged plan view of an enlarged 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 fourth embodiment of the present invention.
Here, in the toilet bowl body portion of the flush toilet bowl according to the fourth embodiment of the present invention shown in FIG. 16, the same portion as the toilet bowl body portion of the flush toilet bowl 1 according to the first embodiment of the present invention shown in FIG. 4 is the same. The reference numerals are given, and these explanations will be omitted.

As shown in FIG. 16, in the flush toilet 300 according to the fourth embodiment of the present invention, a guide wall portion 360 partially protruding inward from the outer peripheral surface thereof is formed in the outer portion 24b of the rim water passage 24. ing.
The guide wall portion 360 includes a rear wall portion 360a formed so as to be separated in front of the inlet portion 24a of the rim water passage 24 and to face the flow path cross section of the inlet portion 24a in the front-rear direction, and the rear wall portion 360a. It is provided with a side wall portion 360b formed from the inner end portion of the portion 360a toward the outer wall surface 362 in the outer portion 24b of the rim water passage 24.
The washing water supplied from the water pipe 28 through the inlet portion 24a of the rim water passage 24 and into the outer portion 24b collides with the wall surface of the rear wall portion 360a of the guide wall portion 360 in front of the guide wall portion 360. After a certain amount of wash water is once stored in the peripheral region R300 of the rear wall portion 360a, it is narrowed by the wall surface of the side wall portion 360b of the guide wall portion 360 and the inner wall surface 364 in the outer portion 24b of the rim water passage 24. It is different from the flush urinal 1 according to the first embodiment of the present invention in that it is guided to the downstream side in a state where the momentum is increased by the flow (contraction) passing through the flow path. There is.

According to the flush toilet 300 according to the fourth embodiment of the present invention described above, the guide wall portion 360 can reduce the air space other than the wash water in the outer portion 24b of the rim water passage 24 at the time of water passage. , The total volume space in the rim water passage 24 can be reduced, and the rim water can be efficiently discharged by the rim water discharge port 26.

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 part of the part 44 Upper side wall part of the outer part of the rim passage 46 Inner peripheral surface of the rim part 48 Overhang part 50 Bending part 52 Relaxing curve 54 Bending part 56 Relaxing curve
58 Wall on the inner peripheral side of the rim on the inner side of the rim passage 100 Washing toilet according to the second embodiment of the present invention 118 Rim 148 Overhang 158 Inner peripheral side of the rim on the inner side of the rim passage Wall part 200 Washing stool according to the third embodiment of the present invention 218 Rim part 226 Rim spout 226a Slope of rim spout 248 Overhang part 300 Washing stool according to the fourth embodiment of the present invention 360 Guide Wall part 360a Guide Rear wall of the wall 360c Side wall of the guide wall 362 Outer wall surface inside the outer part of the rim passage 364 Inner wall surface inside the outer part of the rim passage A Flow section cross section of the outer part of the rim passage A0 Downstream of the rim spout Cross-sectional area of the flow path cross section of the water passage near the side B Flow path cross section of the outer part of the rim water passage C Flow path cross section of the outer part of the rim water passage C1 Center extending in the left-right direction that divides the bowl part into two equal parts Line D Flow path cross section at the bend of the rim water passage E Flow path cross section inside the rim water passage E1 Open cross section of the rim spout E200 Open cross section of the rim spout F1 Front area of the bowl G Downstream of the rim spout Flow path cross section of the water passage near the side H1 Maximum height dimension of the flow path cross section of the outer part of the rim water passage and the bent part H1 Maximum height dimension of the flow path cross section A of the outer part of the rim water passage H2 Maximum height dimension of the outer flow path cross section B H3 Maximum height dimension of the flow path cross section C on the outer side of the rim water passage H4 Maximum height dimension of the flow path cross section D of the bent portion of the rim water passage h rim water passage Maximum height dimension of the flow path cross section inside the rim h1 Maximum height dimension of the flow path cross section E inside the rim water passage L Maximum height dimension of the water passage near the downstream side of the rim spout (shelves of the water passage) Maximum height dimension from the surface to the lower end of the overhang part)
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 waterway near the downstream side of the rim spout R1 Rear area of the bowl R300 Peripheral area of the rear wall of the guide wall S1 Upper end surface of the lower wall of the outer side of the rim waterway Adhesive surface between the upper end surface and the lower end surface of the inner side wall S2 Adhesive surface between the upper end surface of the outer wall of the outer side of the rim passage and the upper side wall t1 The inner peripheral wall of the rim on the inner side of the rim passage Thickness t101 Thickness of the wall on the inner peripheral side of the rim in the inner part of the rim water passage
U Minimum thickness of overhang in the vertical direction (minimum height of overhang)
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 Angle of inclination of the surface ρ Radius of curvature of the relaxation curve ρ1 Radius of curvature of the relaxation curve ρ2 Radius of curvature of the relaxation curve ρ3 Radius of curvature

Claims (1)

A flush toilet that is washed by the wash water supplied from the wash water source and discharges filth.
Bowl-shaped filth receiving surface and
The rim part formed on the upper edge of this filth receiving surface and
With a bowl part and
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.
A headrace that supplies the washing water supplied from the washing water source to the rim water discharge portion, and
Have,
The above rim spouting part
A rim water passage through which the washing water supplied from the headrace can pass is formed in the rim part on either the left or right side of the bowl part.
A rim spout is formed at the downstream end of this rim channel to discharge the wash water backward.
The above rim canal
The outer part extending forward from the entrance part inside the rim part, and
A bent part that bends inward from the downstream end of this outer part,
The inner part extending rearward from this bent part to the rim spout,
The radius of curvature of the bottom surface of the bent portion is larger than the radius of curvature of the bottom surface of the outer portion.
A flush toilet bowl provided with a water passage having an overhang formed in the vicinity of the downstream side of the rim spout.

Images