JP2017206958A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet, in which rim water ejection by a rim water ejecting port may be efficiently executed and flexibility in toilet design may be ensured by reducing space volume in entire of a rim water path.SOLUTION: A water closet 1 of the present invention comprises a bowl part 20 comprising a dirt receiving surface 14 and a rim part 18. The bowl part has a front side region F1 at front side relatively to center line C1 so extending in lateral direction that the bowl part is divided into 2 sections in forth and back direction and a rear side region R1 at rear side. On either side of right and left sides in the front side region of the bowl part, a rim water path 24 through which washing water supplied from a water path 28 to the rim part flows is formed and a rim water ejecting port 26 is formed. The rim water path comprises an outside part 24b extending from an entrance part 24a toward forward side in inner section of the rim part, a folded part 24c inwardly folded from a downstream edge of the outside part, and an inside part 24d extending toward rear side from the folded part to a rim water ejecting port.SELECTED DRAWING: Figure 4

Description

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

Conventionally, as a flush toilet that is washed with wash water supplied from a wash water source and discharges filth, for example, as described in Patent Document 1, an intermediate in the front-rear direction in a rim portion on the side of a bowl portion There is known one in which a water discharge port (rim water discharge port) that discharges water backward is disposed in one region of the region or the rear region.
In such flush toilets, a water passage (rim water passage) through which wash water is supplied from a water conduit on the rear side of the bowl portion is formed inside the rim portion on one side of the bowl portion in the left-right direction. The rim water passage is formed along the shape of the rim portion in the circumferential direction from the rim portion near the front end of the bowl portion to the water outlet (rim water outlet) on the other rim portion in the left-right direction of the bowl portion. Has been.

  Further, as described in Patent Document 2, a water discharge port (rim water discharge port) is disposed in a front region in a rim portion on the side of the bowl portion, and a water discharge port ( Also known about flush toilets, where the wash water pipe extends in the front-rear direction to the rim spout, and the wash water supplied from the wash water source through the wash water pipe to the spout is discharged backwards. It has been.

Japanese Patent No. 5592617 (Japanese Patent Laid-Open No. 2010-255316) JP 2000-265525 A

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. By forming along the shape of the rim in the circumferential direction, the overall length of the rim water passage becomes longer, so that the entire volume space in the rim water passage is also large, and in the rim water passage during water passage, The air space other than the washing water also becomes large.
Therefore, the larger the volume space in the rim water passage, the longer it takes to fill the rim water passage and the longer time it takes to supply cleaning water at a predetermined flow rate from the spout. There exists a problem that there exists a possibility that the efficiency of the rim water discharge discharged from a water discharge port may be reduced.
In addition, there is a problem that abnormal noise is likely to occur due to the air in the rim water passage being entrained during water flow.
Furthermore, since the rim water passage is formed in the vicinity of the front end portion of the bowl portion, there is a problem that the degree of freedom of toilet design regarding the shape of the bowl portion and the rim portion of the toilet bowl may be lowered.

Similarly, in the conventional flush toilet described in Patent Document 2 described above, the washing water conduit extends in the front-rear direction from the washing water source on the rear side of the bowl portion to the water discharge port (rim water discharge port). The entire length of the washing water pipe is increased, and the volume space of the entire washing water pipe is also increased accordingly.
Accordingly, it takes a long time for the washing water passing through the washing water pipeline to fill the water passage, and it takes time to reach a predetermined flow rate. Therefore, the rim water discharged from the water discharge port (rim water discharge port). There is a problem that the efficiency may be lowered. In addition, there is a problem that abnormal noise is likely to occur due to entrainment of air in the washing water pipe during water flow, and a water discharge port (rim water discharge port) is disposed 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 or rim of the toilet bowl may be lowered.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and by reducing the volume space of the entire rim water passage, rim water discharge by the rim water discharge port can be performed efficiently. Both aims to provide a flush toilet that can ensure the degree of freedom of toilet design.

In order to achieve the above-mentioned object, the present invention is a flush toilet that is washed with washing water supplied from a washing water source and discharges waste, and has a bowl-shaped waste receiving surface and an upper surface of the waste receiving surface. A rim portion formed at the edge, a drain portion connected to a lower portion of the bowl portion for discharging filth, and a swivel provided in the rim portion for discharging cleaning water into the bowl portion and turning A rim water spouting portion that forms a flow, and a water conduit that supplies cleaning water supplied from the cleaning water source to the rim water spouting portion, and the bowl portion bisects the bowl portion in the front-rear direction. A front-side region that is the front side and a rear-side region that is the rear side with respect to the center line extending in the left-right direction, and the rim water spouting portion is either one of the left and right in the front-side region of the bowl portion Cleaning supplied from the water conduit to the rim part on the side Forming a rim water passage through which water flows, and forming a rim water outlet at the downstream end of the rim water passage for discharging washing water backward, the rim water passage from the inlet portion to the rim portion. An outer portion extending forward in the interior, a bent portion bent inward from the downstream end of the outer portion, and an inner portion extending backward from the bent portion to the rim water spouting port. It is a feature.
In the present invention configured as described above, the rim water spouting portion, which is provided on the rim portion of the bowl portion and spouts washing water into the bowl portion to form a swirling flow, is provided on either the left or right side in the front side region of the bowl portion. A rim water passage through which the cleaning water supplied from the water conduit passes is formed at the rim portion on one side, and a rim water outlet is formed at the downstream end of the rim water passage to discharge the cleaning water backward. The rim water passage has an outer portion extending forward from the inlet portion to the inside of the rim portion, a bent portion bent inward from the downstream end of the outer portion, and a rim discharge from the bent portion rearward. And the inner portion extending to the water port, the volume space of the entire rim water passage can be reduced, so that when the wash water is supplied from the water conduit into the rim water passage, the rim water passage Immediately with wash water that passes through the volume space inside Plus it is possible.
Therefore, it is possible to reduce the air space other than the cleaning water in the rim water passage when water flows, and the rim water can be efficiently discharged from the rim water outlet.
In addition, it is possible to make it difficult for noise to be generated due to air in the rim water passage when the water flows.
Furthermore, the front end of the bowl part is compared with the case where the rim part is formed along the circumferential shape of the rim part from the rim part near the front end part of the bowl part to the water outlet of the rim part on the other side in the horizontal direction of the bowl part. The degree of freedom of toilet design regarding the shape of the rim portion in the vicinity of the portion can be ensured.

In the present invention, preferably, the height dimension (h) of the channel cross section of the inner portion of the rim water passage is set to be smaller than the height dimension (H) of the channel cross section of the outer portion. ing.
In the present invention configured as described above, the height dimension (h) of the channel cross section at the inner side of the rim water passage is smaller than the height dimension (H) of the channel cross section at the outer side of the rim water channel. For example, in order to reduce the frictional resistance of the wall surface in the rim water passage, etc., the cross section of the rim water passage is almost the entire area from the upstream end to the downstream end of the rim water passage. Compared to a rim water passage formed by the same circular cross section or a cross section having substantially the same aspect ratio, the size of the entire rim portion required for the rim water spouting portion can be effectively set small.
Therefore, it is possible to reduce the air space other than the washing water in the rim water passage when water is passed, and rim water discharge by the rim water outlet can be performed more efficiently.
In addition, it is possible to make it difficult for noise to be generated due to air in the rim water passage when the water flows.
Furthermore, the front end of the bowl part is compared with the case where the rim part is formed along the circumferential shape of the rim part from the rim part near the front end part of the bowl part to the water outlet of the rim part on the other side in the horizontal direction of the bowl part. The degree of freedom of toilet design regarding the shape of the rim portion in the vicinity of the portion can be ensured.

In the present invention, preferably, the ratio (h: H) between the height dimension (h) of the flow path cross section of the inner part and the height dimension (H) of the flow path cross section at the downstream end of the outer part is: It is set to 1: 2 to 1: 8.
In the present invention configured as described above, the ratio of the height dimension (h) of the flow path cross section of the inner portion of the rim water passage to the height dimension (H) at the downstream end of the outer portion of the rim water passage ( h: H) 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, the cross section of the rim water passage is Compared to the rim water passage formed by substantially the same circular cross section or cross section having substantially the same aspect ratio in the entire region from the upstream end to the downstream end, the size of the entire rim portion required for the rim water spouting portion is larger. It can be set effectively small.
Therefore, it is possible to reduce the air space other than the washing water in the rim water passage when water is passed, and rim water discharge by the rim water outlet can be performed more efficiently.
In addition, it is possible to make it difficult for noise to be generated due to air in the rim water passage when the water flows.
Furthermore, the front end of the bowl part is compared with the case where the rim part is formed along the circumferential shape of the rim part from the rim part near the front end part of the bowl part to the water outlet of the rim part on the other side in the horizontal direction of the bowl part. The degree of freedom of toilet design regarding the shape of the rim portion in the vicinity of the portion can be ensured.

In the present invention, preferably, the outer portion includes an outer wall portion on an outer peripheral side of the rim portion, a lower wall portion formed integrally from the lower end of the outer wall portion, and an outer wall portion in a horizontal direction. An inner wall portion whose lower end is bonded to the upper end of the lower wall portion, and an upper wall portion formed integrally with the upper end of the inner wall portion and bonded to the upper end of the outer wall portion, The bonding surface between the lower wall portion and the inner wall portion forms a substantially horizontal plane, and the bonding surface between the outer wall portion and the upper wall portion is inclined with respect to the substantially horizontal plane. An inclined surface is formed.
In the present invention configured as described above, the outer portion of the rim water passage includes an outer wall portion on the outer peripheral side of the rim portion, a lower wall portion formed integrally from the lower end of the outer wall portion, and an outer side. An inner wall portion that is horizontally opposed to the wall portion and whose lower end is bonded to the upper end of the lower wall portion, and an upper wall that is integrally formed with the upper end of the inner wall portion and bonded to the upper end of the outer wall portion A bonding surface between the lower wall portion and the inner wall portion forms a horizontal plane, and a bonding surface between the outer wall portion and the upper wall portion forms an inclined surface inclined with respect to the horizontal plane. Therefore, at the time of toilet bowl production, for example, the adhesive surface at the lower end of the inner wall portion is bonded to the adhesive surface at the upper end of the lower wall portion of the rim water passage, and at the same time, the adhesive surface at the upper end of the outer wall portion of the rim water passage When adhering the adhesive surface of the upper side wall to the inner surface of the lower side wall, which forms a substantially horizontal plane, The adhesive surface of the outer wall portion and the adhesive surface of the upper side wall portion that form inclined surfaces that are inclined with respect to a substantially horizontal plane when the adhesive surface of the wall portion is displaced in the horizontal direction due to a manufacturing error or the like. Can be reliably contacted in advance.
Therefore, since it is possible to prevent the flow path cross section from the outer side to the inner side in the rim water passage from being completely crushed due to the mutual displacement of the adhesive surface of the lower side wall part and the adhesive surface of the inner side wall part, The water passage area of the rim water passage can be secured over the entire area.
The substantially horizontal plane here includes not only a complete horizontal plane but also an approximately horizontal plane in which the adhesive surface of the lower side wall portion and the adhesive surface of the inner side wall portion can be displaced in the horizontal direction.

In the present invention, preferably, the rim water spouting portion forms an overhang portion above the water passage formed near the downstream side of the rim water spouting port of the rim water passage, and forms the inner portion. The wall portion on the inner peripheral side of the rim portion is formed so that the thickness thereof narrows toward the rim water spouting port so that the region of the overhang portion becomes small.
In the present invention configured as described above, the rim water discharge portion forms an overhang portion above the water passage formed near the downstream side of the rim water discharge port of the rim water passage, and the inside of the rim water passage The wall portion on the inner peripheral side of the rim portion forming the portion is formed so that the thickness thereof is narrowed toward the rim spout so that the region of the overhang portion is reduced, so that the rim water passage Since the space around the rim water passage that is bent from the outer part to the inner part through the bent part can be given a clearance, pressure loss of the washing water in the rim water passage can be suppressed, and the rim water discharge part The degree of freedom of toilet design regarding the shape and the like can be ensured.
Moreover, the scattering of water and the pressure loss of the rim water discharge due to the rim water discharged from the rim water discharge port coming into contact with the overhang portion can be suppressed.

In the present invention, preferably, the rim water spouting port has a triangular opening section, and one side of the triangular rim water spouting port forms an overhang portion.
In the present invention configured as described above, the opening cross section of the rim water spouting port is formed in a triangular shape, and one side of the triangular rim water spouting port forms an overhang portion. Compared with a rim water spouting port having a rectangular cross section and the same width as the width of the opening cross section of the triangular rim water spouting port, the overhang region can be made smaller. Moreover, the scattering of water and the pressure loss of the rim water discharge due to the rim water discharged from the rim water discharge port coming into contact with the overhang portion can be suppressed.

In the present invention, preferably, a guide wall portion for guiding the wash water supplied from the water conduit to the downstream side is formed on the outer side portion.
In the present invention configured as described above, a guide wall portion that guides the cleaning water supplied from the water conduit is formed on the outer portion of the rim water conduit, so that the outside of the rim water conduit from the water conduit is formed. After the cleaning water supplied to the part collides with the guide wall part, a certain amount of cleaning water is once collected in the peripheral area of the guide wall part. , Can be guided downstream in a state of increased momentum. In addition, since the guide wall portion can reduce the air space other than the washing water in the outer portion of the rim water passage during water flow, the volume space of the entire rim water passage can be reduced, and the rim water outlet Rim water can be discharged efficiently.

  According to the flush toilet of the present invention, by reducing the entire volume space in the rim water passage, rim water can be efficiently discharged from the rim water outlet, and the degree of freedom of toilet design can be secured. .

It is a perspective view which shows the flush toilet bowl by 1st Embodiment of this invention, and shows the state which rotated the toilet lid and the toilet seat to the upper position. It is sectional drawing which looked at the center cross section of the left-right direction in the flush toilet bowl by 1st Embodiment of this invention from the left side, and shows the state which rotated the toilet lid and the toilet seat to the downward position. It is a fragmentary top view which shows the toilet bowl main-body part of the flush toilet bowl by 1st Embodiment of this invention shown in FIG. FIG. 4 is a partially enlarged plan view in which a portion of a rim water passage formed inside a rim portion is enlarged in the toilet main body portion of the flush toilet according to the first embodiment of the present invention shown in FIG. 3. FIG. 5 is a partially enlarged cross-sectional view of a rim portion taken along line VV in FIG. 4. It is A cross section of the rim water passage shown in FIG. Fig. 5 is a B cross section of the rim water passage shown in Fig. 4. It is C cross section of the rim water passage shown in FIG. It is D cross section of the rim water passage shown in FIG. It is 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. It is sectional drawing along the VIII-VII line of FIG. It is sectional drawing along the XI-XI line of FIG. The relationship between the distance (x) from the rim spouting port to the downstream side in the circumferential direction and the height dimension (U) 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 the figure which showed qualitatively. The distance (x) from the rim spouting port 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 the figure which showed the relationship with the dimension (L) qualitatively. The distance (x) from the rim water outlet to the downstream side in the circumferential direction of the water passage near the downstream side of the rim water outlet of the flush toilet according to the first embodiment of the present invention and the width (W of the water passage downstream of the rim water outlet) ) Is a diagram qualitatively showing the relationship. It is sectional drawing along the XI-XI line of FIG. It is sectional drawing along the XII-XII line | wire 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 bent portion of the bowl portion are connected by a relaxation curve. ) Is a diagram qualitatively showing the change of (). FIG. 13A is a comparative example for the flush toilet according to the first embodiment of the present invention shown in FIG. 13A, and the downstream side in the circumferential direction from the rim spout when the straight part and the bent part of the bowl part are connected by a curve tangent to the straight line It is the figure which showed qualitatively the change of distance (x) of this, and curvature (1 / ρ). In the toilet bowl main body part of the flush toilet bowl by 2nd Embodiment of this invention, it is the elements on larger scale which expanded the part of the rim water passage formed in the inside of a rim | limb part. It is a schematic sectional drawing which shows roughly the cross-sectional part (Rim water outlet and the flow-path cross-sectional part of the water flow path of the downstream side) of the rim water outlet in the flush toilet by 3rd Embodiment of this invention. In the toilet bowl main body part of the flush toilet bowl by 4th Embodiment of this invention, it is the elements on larger scale which expanded the part of the rim water passage formed in the inside of a rim | limb part.

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

As shown in FIGS. 1-3, the flush toilet 1 by 1st Embodiment of this invention is the toilet bowl body 2 made from earthenware, and the toilet seat arrange | positioned on the upper surface of this toilet bowl body 2 so that rotation was possible to an up-down direction. 4, a toilet lid 6 disposed so as to be rotatable in the vertical direction so as to cover the toilet seat 4, and a functional unit 8 disposed behind the toilet body 2.
Moreover, as shown in FIG. 2, the function part 8 is arrange | positioned in the rear upper part of the toilet body 2, and the sanitary washing system function part 10 which functions as a sanitary washing part which wash | cleans a user's local part, and this sanitary washing system The water supply system function part 12 which is arrange | positioned adjacent to the function part 10 and is concerned with the water supply function to the toilet bowl main body 2 is provided.

Next, as shown in FIGS. 1 to 3, the toilet body 2 includes 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 part 20 provided with is provided.
In addition, as shown in FIG. 2, the toilet body 2 includes a drain trap pipe 22, which is connected to an inlet 22 a below the bowl 20 and discharges filth in the bowl 20. .

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

In the flush toilet 1 of the present embodiment, the rim water passage 24 and the rim spout 26 that are rim water spouting portions are seen on the right rim in the front side region F1 of the bowl portion 20 when viewed from the front of the toilet body 2. Although the form arrange | positioned inside the part 18 is demonstrated, it is not limited to such a form, seeing a rim spout from the front of the toilet body 2 in the left side rim part 18 in the front side area | region F1 of the bowl part 20. You may make it arrange | position and perform rim water discharge toward back.
In short, the rim water passage and the rim water outlet, which are rim water spouting portions, are arranged on the rim portion 18 on either the left or right side in the front side region F1 of the bowl portion 20 so as to discharge the rim toward the rear. Any form can be used.
Further, in the flush toilet 1 of the present embodiment, the rim water passage 24 and the rim water outlet 26 which are rim water spouting portions are formed integrally with the toilet body 2 by processing ceramics. The toilet body 2 may be formed separately from the toilet body 2 and attached to the toilet 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 22 a of the drain trap pipe 22. With respect to water discharge (jet water discharge) from the jet water discharge port 32, the wash 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. The jet spout 32 is discharged.
In addition, the wash water discharged from the jet spout 32 flows from the inlet 22a of the drain trap pipe 22 into the rising pipe 22b on the rear side of the inlet 22a, and then flows through the rising pipe 22b. The drainage trap pipe 22 flows out from the top 22c to the descending pipe 22d.

Here, the specific structure of each of the sanitary washing system function unit 10 and the water supply system function unit 12 is the same as that of the conventional one, and thus detailed description is omitted. Is provided with a local cleaning device (not shown) including a nozzle device (not shown) for injecting cleaning water toward the user above the bowl portion 20.
In addition, the sanitary cleaning system function unit 10 has a water storage unit (not shown) for storing cleaning water supplied to a local cleaning device (not shown), and the cleaning water in the water storage unit (not shown) at an appropriate temperature. A heater (not shown) for heating to warm water, a ventilation fan (not shown), a deodorizing fan (not shown), a hot air fan (not shown), and a controller for controlling the operation of these devices (Not shown) etc. are provided.
On the other hand, the water supply channel (not shown) of the water supply system function unit 12 is connected to a water supply (not shown) which is a water supply source on the upstream side thereof, and is connected to the water supply channel on the upstream side of the water storage tank (not shown). Are 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. It has been. In addition to these, the water supply system function unit 12 includes 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). And a controller (not shown) for controlling the operation time and the like.

  In the flush toilet 1 according to the present embodiment, the rim water discharge by the rim water discharge port 26 is performed using the water supply pressure, and the pressure pump (not shown) is controlled for the jet water discharge by the jet water discharge port 32. Thus, a so-called hybrid flush toilet that supplies wash water in a water storage tank (not shown) will be described. However, 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 wash water is supplied directly only from the water supply, 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 cleaning water in the water storage tank may be configured to switch 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 only the pump.

Next, the 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 with reference to FIGS.
FIG. 4 is a partially enlarged plan view of the toilet body portion of the flush toilet according to the first embodiment of the present invention shown in FIG. 3 in which a portion of the rim water passage formed inside the rim portion is enlarged. FIG. 5 is a partially enlarged cross-sectional view of a rim portion taken along line VV in FIG. 4.
6A is a cross section A of the rim water passage shown in FIG. 4, and FIG. 6B is a B cross section of the rim water passage shown in 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. 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 includes an outer portion 24 b extending forward from the inlet portion 24 a connected to the water conduit 28 toward the inside of the rim portion 18, and a downstream end of the outer portion 24 b. A bent portion 24c that bends inward and an inner portion 24d that extends rearwardly from the bent portion 24c to the rim water spouting port 26 are provided.

Further, as shown in FIGS. 5 and 6A to 6E, the flow path cross section of the inner portion 24d of the rim water passage 24 is set to the maximum height H of the cross section of the outer portion 24b and the bent portion 24c of the rim water passage 24. , The maximum height dimension h1 of each flow passage section E of the inner portion 24d of the rim water passage 24 is the maximum height of each flow passage cross section A to C of the outer portion 24b of the rim water passage 24. The height dimensions H1 to H3 and the maximum height dimension H4 of the channel cross section D of the bent portion 24c are set to be smaller.
In the flush toilet 1 of the present embodiment, for example, the maximum height dimension h1 of the channel cross section E of the inner portion 24d of the rim water passage 24 and the downstream end (bent portion) of the outer portion 24b of the rim water passage 24. The ratio (h1: H4) to the maximum height dimension H4 of the flow path cross section D at the upstream end of 24c is preferably set to 1: 2 to 1: 8, and is preferably 1: 2 to 1: 5. Most preferably, it is set to.
Accordingly, for example, in a flush toilet different from the present invention, in order to reduce the frictional resistance and the like of the wall surface in the rim water passage, the cross section of the rim water passage is from the upstream end to the downstream end of the rim water passage. In the flush toilet 1 of the present embodiment, compared to a rim water passage formed with substantially the same circular cross section or a cross section having substantially the same aspect ratio in the entire region, the rim water passage 24 and the rim water outlet are rim water spouting portions. The size of the entire rim portion 18 required for the rim 26 can be effectively reduced.
Therefore, it is possible to reduce the air space other than the washing water in the rim water passage 24 when water flows, and to efficiently perform the rim water discharge by the rim water outlet 26.
Further, it is possible to make it difficult to generate abnormal noise due to the air in the rim water passage 24 being involved when water flows.
Further, by reducing the overall volume space in the rim water passage 24, the space around the rim water passage 24 bent from the outer portion 24b of the rim water passage 24 to the inner portion 24d via the bent portion 24c is made room. Therefore, the pressure loss of the wash water in the rim water passage 24 can be suppressed, and the degree of freedom of toilet design regarding the shape of the rim portion 18 of the bowl portion 20 can be secured. .

Next, as shown in FIG. 5, the outer portion 24 b of the rim water passage 24 includes an outer wall portion 38 on the outer peripheral side of the rim portion 18, and a lower side wall formed integrally from the lower end of the outer wall portion 38. Part 40, an outer wall 38 that is opposed to the outer wall 38 in the horizontal direction and whose lower end is bonded to the upper end of the lower wall 40, and is formed integrally with the upper end of the inner wall 42, and the outer wall And an upper side wall portion 44 bonded to the upper end of the portion 38.
Further, an adhesive surface S1 between the upper end surface of the lower side wall portion 40 of the outer side 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, The adhesive surface S2 with the side wall portion 44 forms an inclined surface that is inclined with respect to a substantially horizontal plane.
The “substantially horizontal plane” referred to here is not only a complete horizontal plane, but also the upper end surface (adhesion surface) of the lower side wall portion 40 and the lower end surface (adhesion surface) of the inner side wall portion 42 are displaced from each other in the horizontal direction. It also includes an approximately horizontal surface that can be used.
Thereby, for example, at the time of manufacturing the flush toilet 1 of the present embodiment, the adhesive surface S1 at the lower end of the inner wall portion 42 is bonded to the adhesive surface S1 at the upper end of the lower wall portion 40 of the rim water passage 24, When the bonding surface S2 of the upper side wall 44 is bonded to the bonding surface S2 of the upper end of the outer wall 38 of the rim water passage 24, the bonding surface S1 of the lower side wall 40 and the bonding surface of the inner wall 42 form a horizontal plane. Even if S1 is shifted 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 inclined surfaces that are inclined with respect to the horizontal plane are formed. In this way, it is possible to make a reliable contact in advance.
Therefore, the channel cross-sections A to E from the outer portion 24b to the inner portion 24d in the rim water passage 24 are completely crushed by the mutual displacement of the bonding surface S1 of the lower wall portion 40 and the bonding surface S1 of the inner wall portion 42. Therefore, the water flow area of the rim water passage 24 can be secured 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 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 the portion of the water passage near the downstream side of the rim spout is enlarged, and FIG. FIG. 9 is a sectional view taken along line VIII-VII, and FIG. 9 is a sectional view taken along line XI-XI in FIG.
10A shows the distance (x) from the rim spouting port 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 view qualitatively showing the relationship with (U), and FIG. 10B is a downstream 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. FIG. 10C is a view qualitatively showing the relationship between the distance (x) on the side and the maximum height dimension (L) from the shelf surface to the lower end of the overhang portion, and FIG. 10C shows the water washing according to the first embodiment of the present invention. Qualitatively shows the relationship between the distance (x) downstream from the rim spout and the lateral width (W) downstream of the rim spout in the water passage near the downstream side of the rim spout of the toilet. It is a figure.

First, as shown in FIGS. 7 to 9, from the downstream end of the rim spouting port 26, a bent portion 50 (details will be described later) of the bowl portion 20, that is, a water passage formed near the downstream side of the rim spouting port 26. 30 includes 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 channel 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 does not have an overhang shape like the overhang portion 48.
As shown in FIGS. 4 and 7 to 10C, the water passage 30 has a channel cross section G such that the cross sectional area A0 of the channel 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 lateral width W is set smaller toward the downstream side.
That is, for example, for the minimum vertical thickness U2 of the overhang portion 48 of the water passage 30 shown in FIG. 9, the cross-sectional area A0 of the flow passage section G is substantially constant so that the water passage 30 shown in FIG. The overhang portion 48 is smaller than the minimum vertical thickness U1.

Further, the maximum height dimension L2 in the vertical direction of the water passage 30 of the channel cross section G2 shown in FIG. 9 is such that the cross sectional area A0 of the channel cross section G is substantially constant. It is larger than the maximum height dimension L1 in the vertical direction of the channel cross section G1.
Here, “the cross-sectional area A0 is substantially constant” is not only completely constant, but also passes through the flow path section G of the water passage 30 on the downstream side of the rim water outlet 26 after water is discharged from the rim water outlet 26. The rim water spouting can be prevented from being disturbed and can flow downstream along the water passage 30, and a stable swirling flow can be effectively formed in the downstream bowl portion 20. It is a waste.
Further, for the lateral width W2 of the water passage 30 of the flow passage section G2 shown in FIG. 9, the water passage of the flow section G1 of the water passage 30 shown in FIG. It is smaller than the width W1 of 30.
Further, as shown in FIGS. 8 and 9, the shelf surface 16 that forms the flow path cross section G of the water passage 30 has a height position P <b> 1 at a substantially constant height position from the rim spout 26 toward the downstream side. It is formed to become.
Here, the “substantially constant height position” is not only completely constant, but also passes through the flow path section G of the water passage 30 on the downstream side of the rim water spouting port 26 after being discharged from the rim water spouting port 26. The rim water discharge is prevented from being disturbed and can flow downstream along the water passage 30, and a stable swirling flow can be effectively formed in the downstream bowl portion 20. Is included.

As a result, the rim water spouting that passes through the flow passage section G of the water passage 30 after being discharged from the rim water outlet 26 can be prevented from being disturbed and can flow downstream along the water passage 30. A stable swirling flow can be effectively formed in the side bowl portion 20.
Furthermore, since the wash water discharged from the rim water discharge port 26 can be prevented from splashing the wash water by forming a stable flow downstream along the downstream water passage 30, the bowl portion The visibility and cleanability of 20 can be effectively enhanced.

  As shown in FIGS. 8 and 9, the minimum thickness U in the vertical direction of the overhang portion 48 that is the minimum height dimension of the overhang portion 48 in the flow path section G of the water passage 30 and the shelf surface 16 The ratio (U: L) with the maximum height dimension L in the vertical direction of the water passage 30 that is the maximum height dimension to the lower end of the hang part 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 on the right rear side region in the bowl portion 20 and on the downstream side of the water passage 30 is directed from the rim spout 26 to the downstream side in the circumferential direction. A curved portion 50 is formed in which the curvature (1 / ρ) changes from small to large (in other words, the curvature radius ρ changes from large to small) according to the distance (x). That is, in the bent portion 50, the curvature (1 / ρ) changes at a constant ratio from small to large in a plan view shown in FIG. 3 (in other words, the curvature radius ρ changes at a constant ratio from large to small). ) It is formed by a relaxation 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 also has a rim portion 18 corresponding to the distance (x) from the rim spout 26 toward the downstream side in the circumferential direction. The curvature (1 / ρ) changes from small to large (in other words, the curvature radius ρ changes from large to small) from the left rear side to the front. In the bent portion 54, the curvature (1 / ρ) changes at a constant ratio from small to large in a plan view shown in FIG. 3 (in other words, the curvature radius ρ changes at a constant ratio from large to small). It is formed by a relaxation curve 56 such as a curve.
As a result, when the cleaning water discharged from the rim spout 26 is first swung along the bent portion 50, it is possible to effectively suppress the occurrence of a sudden change in centrifugal force with respect to the cleaning water. Thus, the cleaning efficiency in the bowl portion 20 can be improved.
Further, the cleaning water swirled along the bent portion 50 passes along the inner peripheral wall of the rim portion 18, passes through the rear side region in the bowl portion 20, and turns to the downstream side in the circumferential direction, and then along the bent portion 54. The front side region in the bowl portion 20 is swiveled, but when turning the bent portion 54, it is possible to effectively suppress the occurrence of a sudden change in centrifugal force with respect to the washing water. Thus, the cleaning efficiency in the bowl portion 20 can be improved.
In the flush toilet 1 of the present embodiment, a clothoid curve in which the curvature changes at a constant ratio is adopted for each of the relaxation curves 52 and 56 of the bent portions 50 and 54 formed by the inner peripheral wall of the rim portion 18. However, as the relaxation curve, a sine half-wavelength reduction curve that is a relaxation curve other than the clothoid curve may be employed.

Next, referring to FIG. 3 and FIGS. 11 to 13B, the bent portions 50 and 54 formed by the relaxation curves 52 and 56 in a plan view in the bowl portion 20 of the flush toilet 1 according to the first embodiment of the present invention. Details will be described.
Here, FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 3, and FIG. 12 is a cross-sectional view taken along line XII-XII in FIG.
Moreover, FIG. 13A shows the distance (x) on 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 relaxation curve in the flush toilet according to the first embodiment of the present invention. FIG. 13B is a comparative example for the flush toilet according to the first embodiment of the present invention shown in FIG. 13A, and shows a straight portion of the bowl portion. It is the figure which showed qualitatively the change of the distance (x) and curvature (1 / ρ) of the peripheral direction downstream side from a rim spouting mouth at the time of connecting a bent part with a curve which is tangent to a straight line.

First, as shown in FIGS. 3, 11, and 12, the bowl portion 20 forms a shelf surface 16 at the bent portions 50 and 54 formed by the relaxation curves 52 and 56, and the lateral width W <b> 3 of the shelf surface 16. Is substantially constant along the circumferential direction of the bowl portion 20.
Here, “substantially constant” is not only completely constant, but also when the cleaning water spouted 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 is possible to 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, the shelf surfaces 16 of the bent portions 50 and 54 formed by the relaxation curves 52 and 56 of the bowl portion 20 are inclined at angles α1 and α2, respectively, with respect to the horizontal plane. 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 magnitude of the inclination angle α2 is set larger than the magnitude of the inclination angle α1, and is preferably set to 3 ° to 60 °, and most preferably set to 5 ° to 30 °. .
As a result, when the cleaning water discharged from the rim spout 26 is swung along the shelf surface 16 of the bent portions 50 and 54, it is more effective that a sudden centrifugal force change occurs with respect to the cleaning water. Therefore, it is possible to improve the cleaning efficiency in the bowl portion 20 better.

Moreover, as shown in FIG. 13A, in the flush toilet 1 of the present embodiment, when the straight part and the bent part of the bowl part 20 are connected by a relaxation curve, the rim spout 26 In a section where the distance x on the downstream side in the circumferential direction is from 0 to x1 (for example, x1 = 50 mm), the curvature 1 / ρ is constant a (for example, ρ1 = 800 mm, a = 1 / ρ1 = 0.00125 [1 / mm]), which is a section that forms a linear portion that is substantially 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). .00125, [rho] 2 = 150 mm, b = 1 / [rho] 2 = 0.00667 [1 / mm]), and a section (relaxation curve section) in which a bent portion is formed by a relaxation curve that changes at a constant ratio.
As shown in FIG. 13A, in a section where the distance x is from x2 to x3 (for example, x3 = 380 mm), the curvature 1 / ρ2 is constant b (for example, ρ2 = 150 mm, b = 1 / ρ2 = 0. 00667 [1 / mm]), which is a section in which a curved portion having a substantially constant curvature is formed.

  On the other hand, as shown in FIG. 13B, in the comparative example in which the straight line portion and the bent 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 rapidly changing from radius ρ = ∞) to c (curvature radius ρ = ρ3), when the cleaning water discharged from the rim water spouting water swivels along the shelf surface of the bending portion, An abrupt change in centrifugal force is generated as compared with the flush toilet 1 of the present embodiment, and the cleaning efficiency in the bowl portion is reduced.

Next, the operation of the flush toilet 1 according to the first embodiment of the present invention described above will be described.
First, according to the flush toilet 1 according to the first embodiment of the present invention, the rim water spouting portion that is provided on the rim portion 18 of the bowl portion 20 and discharges washing water into the bowl portion 20 to form a swirling flow. A rim water passage 24 through which the washing water supplied from the water conduit 28 flows is formed inside the right rim portion 18 in the front side region F1 of the bowl portion 20, and the downstream end of the rim water passage 24 is washed. A rim spout 26 for discharging water toward the rear is formed, and a rim water passage 24 has an outer portion 24b extending forward from the inlet portion 24a through the inside of the rim portion 18, and a downstream end of the outer portion 24b. By providing the bent portion 24c bent inward from the inner portion and the inner portion 24d extending rearward from the bent portion 24c to the rim water spouting port 26, the entire volume space in the rim water passage 24 can be reduced. .
Therefore, when the cleaning water is supplied from the water conduit 28 into the rim water passage 24, it can be quickly filled with the cleaning water that passes through the volume space in the rim water passage 24. Therefore, it is possible to reduce the air space other than the cleaning water in the rim water passage 24 when water flows, and the rim water discharge by the rim water discharge port 26 can be performed efficiently.
In addition, it is possible to make it difficult for abnormal noise to occur due to the air in the rim water passage 24 being entrained during water flow.
Further, a rim water passage is formed along the circumferential shape of the rim portion from the rim portion 18 near the front end portion of the bowl portion 20 to the water outlet of the rim portion 18 on the other side of the bowl portion 20 in the left-right direction. Compared to the case, the degree of freedom of toilet design related to the shape and the like of the rim portion 18 near the front end of the bowl portion 20 can be ensured.

Next, according to the flush toilet 1 according to the present embodiment, the height dimension h1 of the flow path section E of the inner portion 24d of the rim water passage 24 is equal to the flow path of the outer portion 24b and the bent portion 24c of the rim water passage 24. Since it is set to be smaller than the height dimensions H1 to H4 of the cross sections A to D, for example, the flow path cross section of the rim water passage has a rim in order to reduce the frictional resistance of the wall surface in the rim water passage. Compared to the rim water passage formed by substantially the same circular cross section or cross section having the same aspect ratio in the entire region from the upstream end to the downstream end of the water passage, the rim portion required for the rim water passage 24 and the rim water outlet 26 The overall width and the like of 18 can be effectively reduced.
Therefore, it is possible to reduce the air space other than the cleaning water in the rim water passage 24 during water flow, and the rim water discharge by the rim water discharge port 26 can be performed more efficiently.
In addition, it is possible to make it difficult for abnormal noise to occur due to the air in the rim water passage 24 being entrained during water flow.
Further, a rim water passage is formed along the circumferential shape of the rim portion from the rim portion 18 near the front end portion of the bowl portion 20 to the water outlet of the rim portion 18 on the other side of the bowl portion 20 in the left-right direction. Compared to the case, the degree of freedom of toilet design related to the shape and the like of the rim portion 18 near the front end of the bowl portion 20 can be ensured.

Further, according to the flush toilet 1 according to the present embodiment, the height dimension h of the channel cross section E of the inner portion 24d of the rim water passage 24 and the downstream end (of the bent portion 24c of the outer portion 24b of the rim water passage 24). Since the ratio (h: H) with the height dimension H at the upstream end) is set to 1: 2 to 1: 8, for example, to reduce the frictional resistance of the wall surface in the rim water passage, The rim water passage 24 has a cross section of the rim water passage in the entire region from the upstream end to the downstream end of the rim water passage, compared with a rim water passage formed by substantially the same circular cross section or a cross section having substantially the same aspect ratio. In addition, the overall width and the like of the rim portion 18 required for the rim spout 26 can be set more effectively small.
Therefore, it is possible to reduce the air space other than the cleaning water in the rim water passage 24 during water flow, and the rim water discharge by the rim water discharge port 26 can be performed more efficiently.
In addition, it is possible to make it difficult for abnormal noise to occur due to the air in the rim water passage 24 being entrained during water flow.
Further, a rim water passage is formed along the circumferential shape of the rim portion from the rim portion 18 near the front end portion of the bowl portion 20 to the water outlet of the rim portion 18 on the other side of the bowl portion 20 in the left-right direction. Compared to the case, by reducing the overall volume space in the rim water passage 24, a space around the rim water passage 24 that is bent from the outer portion 24b of the rim water passage 24 to the inner portion 24d via the bent portion 24c is provided. Therefore, the pressure loss of the washing water in the rim water passage 24 can be suppressed, and the degree of freedom of toilet design regarding the shape of the rim portion 18 near the front end of the bowl portion 20 can be secured. it can.

Furthermore, according to the flush toilet 1 according to the present embodiment, the outer portion 24 b of the rim water passage 24 is formed integrally with the outer wall portion 38 on the outer peripheral side of the rim portion 18 and the inner side from the lower end of the outer wall portion 38. The lower side wall portion 40 and the outer side wall portion 38 which are horizontally opposed to each other and whose lower end is bonded to the upper end of the lower side wall portion 40 are integrally formed with the upper end of the inner side wall portion 42. And an upper wall portion 44 bonded to the upper end of the outer wall portion 38, and the bonding surface S 1 between the lower wall portion 40 and the inner wall portion 42 forms a substantially horizontal plane. The bonding 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 toilet bowl production, the adhesive surface S1 at the lower end of the inner wall 42 is bonded to the adhesive surface S1 at the upper end of the lower wall 40 of the rim water passage 24 and at the same time the outer wall 38 of the rim water passage 24. When the bonding surface S2 of the upper side wall portion 44 is bonded to the bonding surface S2 of the upper end of the upper surface of the upper surface of the lower wall portion 40, the bonding surface S1 of the lower side wall portion 40 and the bonding surface S1 of the inner side wall portion 42 that form a substantially horizontal plane are When trying to deviate from each other in the horizontal direction, the adhesive surface S1 of the outer wall 38 and the adhesive surface S1 of the upper side wall 44 that form inclined surfaces that are inclined with respect to a substantially horizontal plane come into contact with each other with certainty in advance. be able to.
Therefore, the channel 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 of the adhesive surface S1 of the lower side wall portion 40 and the adhesive surface S1 of the inner side wall portion 42. Therefore, the water passage area of the rim water passage 24 can be ensured over the entire area.

Next, with reference to FIG. 14, a flush toilet according to a second embodiment of the present invention will be described.
FIG. 14 is a partially enlarged plan view of the toilet body portion of the flush toilet according to the second embodiment of the present invention, in which the rim water passage portion formed inside the rim portion is enlarged.
Here, in the toilet body part of the flush toilet according to the second embodiment of the present invention shown in FIG. 14, the same parts as the toilet body part of the flush toilet 1 according to the first embodiment of the present invention shown in FIG. The description thereof will be omitted.

First, as shown in FIG. 4, in the flush toilet 1 according to the first embodiment of the present invention, an overhang portion is provided above the water passage 30 formed near the downstream side of the rim water outlet 26 of the rim water passage 24. 48, and the wall portion 58 on the inner peripheral side of the rim portion 18 that forms the inner portion 24d of the rim water passage 24 has a smaller area of the overhang portion 48 that covers the water passage 30 on the downstream side thereof. Further, the thickness t1 is substantially constant from the upstream side of the inner portion 24d of the rim water passage 24 toward the rim water spouting port 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 side portion 24d of the rim water passage 24 so that the region of the overhang portion 148 that covers the water passage 130 on the downstream side becomes small. It is different in structure from the wall portion 58 on the inner peripheral side of the rim portion 18 of the flush toilet 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 toilet 100 according to the second embodiment of the present invention described above, the downstream side water passage 130 is provided to the wall portion 158 on the inner peripheral side of the rim portion 118 that forms the inner portion 24d of the rim water passage 24. The rim water passage 24 is formed such that the thickness t101 is narrowed from the upstream side of the inner portion 24d of the rim water passage 24 toward the rim water outlet 26 so that the region of the overhang portion 148 to be covered becomes small. Since the peripheral space of the rim water passage 24 bent from the outer portion 24b to the inner portion 24d through the bent portion 24c can be given a clearance, the pressure loss of the washing water in the rim water passage 24 can be suppressed. At the same time, the degree of freedom of toilet design regarding the shape of the rim water passage 24 and the rim water outlet 26, which are rim water spouting sections, can be ensured.
In addition, it is possible to suppress the scattering of water and the pressure loss of the rim water discharge due to the rim water discharged from the rim water discharge port 26 coming into contact with the overhang portion 148.

Next, a flush toilet according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 15 is a schematic cross-sectional view schematically showing a cross-sectional portion in the vicinity of a rim spout (a cross-sectional portion of a rim spout and a downstream water passage) in a flush toilet according to a third embodiment of the present invention. is there.
Here, in the toilet main body part of the flush toilet according to the third embodiment of the present invention shown in FIG. 15, the same reference numerals are given to the same parts as the toilet main body part of the flush toilet 1 according to the first embodiment of the present invention. A description thereof will be omitted.
In FIG. 15, as a comparative example for the flush toilet 200 according to the third embodiment of the present invention, the shape of the rim spout 26 and the overhang portion 48 of the flush toilet 1 according to the first embodiment of the present invention is a chain line. Is shown.

As shown in FIG. 15, in the flush toilet 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. A hypotenuse 226 a that is one side of the portion 248 forms a part of the overhang portion 248.
Thereby, 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 in the flush toilet 1 according to the first embodiment of the present invention shown in FIG. 15 is formed in a rectangular shape. Compared with the rim spout 26 that is 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, 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, the passage on the downstream side 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 region of the overhang portion 48 above the water channel 30.

According to the flush toilet 200 according to the above-described third embodiment of the present invention, the opening cross section E200 of the rim water spouting port 226 is formed in a triangular shape, so that the upper side of the water passage 230 on the downstream side of the rim water spouting port 226. The area of the overhang portion 248 can be reduced, and a space around the rim water passage 24 that is bent from the outer portion 24b of the rim water passage 24 to the inner portion 24d through the bent portion 24c can be given a space. .
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 generated by the rim spout discharged from the rim spout 226 coming into contact with the overhang portion 248 is reduced. Spattering and pressure loss of rim water can be suppressed.

Next, with reference to FIG. 16, a flush toilet according to a fourth embodiment of the present invention will be described.
FIG. 16 is a partially enlarged plan view of the toilet main body portion of the flush toilet according to the fourth embodiment of the present invention, in which the rim water passage portion formed inside the rim portion is enlarged.
Here, in the toilet main body part of the flush toilet according to the fourth embodiment of the present invention shown in FIG. 16, the same parts as the toilet main body part of the flush toilet 1 according to the first embodiment of the present invention shown in FIG. The description thereof 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 is formed in the outer portion 24 b of the rim water passage 24. ing.
The guide wall portion 360 includes a rear wall portion 360a formed in such a manner as to be separated from the front side of the inlet portion 24a of the rim water passage 24 and to face the cross section of the flow path of the inlet portion 24a in the front-rear direction. The side wall part 360b formed toward the outer side wall surface 362 in the outer side part 24b of the rim water passage 24 from the inner side edge part of the part 360a is provided.
The cleaning water supplied from the water guide pipe 28 into the outer portion 24b through the inlet portion 24a of the rim water passage 24 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 cleaning water is once accumulated 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 differs from the flush toilet 1 according to the first embodiment of the present invention in that it is guided to the downstream side in a state of increased momentum by the flow (constricted flow) passing through the formed flow path. Yes.

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

DESCRIPTION OF SYMBOLS 1 Flush toilet according to the first embodiment of the present invention 2 Toilet body 4 Toilet seat 6 Toilet lid 8 Functional part 10 Sanitary washing system functional part 12 Water supply system functional part 14 Soil receiving surface 16 Shelf surface 18 Rim part 20 Bowl part 22 Drain trap Pipe (drainage)
22a Inlet part 22b Ascending pipe line 22c Top part 22d Descent pipe line 24 Rim water passage (rim water discharge part)
24a Inlet part of the rim water passage 24b Outer part of the rim water passage 24c Bending part of the rim water passage 24d Inner part of the rim water passage 26 Rim water outlet (rim water outlet)
28 Water conduit (water conduit)
30 Water passage near the downstream side of the rim water outlet 32 Jet water outlet 34 Water storage tank 36 Pressure pump 38 Outer wall portion of the outer portion of the rim water passage 40 Lower side wall portion of the outer portion of the rim water passage 42 Outside of the rim water passage 42 Inner side wall portion 44 Upper side wall portion of outer portion of rim water passage 46 Inner peripheral surface of rim portion 48 Overhang portion 50 Bending portion 52 Relaxation curve 54 Bending portion 56 Relaxation curve 58 Rim portion of inner side of rim water passage Inner peripheral wall portion 100 Flush toilet according to the second embodiment of the present invention 118 Rim portion 148 Overhang portion 158 Wall portion on the inner peripheral side of the rim portion in the inner portion of the rim water passage 200 Third embodiment of the present invention Flush toilet 218 rim part 226 rim spout 226a hypotenuse of rim spout 248 overhang part 300 Flush toilet 3 according to the fourth embodiment of the present invention 3 0 Guide wall portion 360a Rear wall portion of guide wall portion 360c Side wall portion of guide wall portion 362 Outer wall surface in outer portion of rim water passage 364 Inner wall surface in outer portion of rim water passage A A Channel cross section of outer portion of rim water passage A0 Cross-sectional area of the channel cross section of the water passage near the downstream side of the rim spout B B Channel cross section of the outer portion of the rim water channel C Channel cross section of the outer portion of the rim water channel C1 Divided in the longitudinal direction of the bowl portion The center line extending in the left-right direction D The cross-section of the bent portion of the rim water passage E The cross-section of the inner passage of the rim water passage E1 The cross-section of the rim spout E200 The cross-section of the rim spout F1 The front region of the bowl G Channel cross section of water passage near downstream side of rim water outlet H Maximum height of channel cross section of outer side of rim water channel and bent part H1 Maximum height of channel cross section A of outer side of rim water channel Dimensions H2 Flow outside the rim waterway Maximum height dimension of cross section B H3 Maximum height dimension of flow path cross section C on the outer side of the rim water passage H4 Maximum height dimension of flow path cross section D on the bent portion of the rim water passage h Flow in the inner side of the rim water passage Maximum height of the channel cross section h1 Maximum height of the channel cross section E inside the rim water channel L Maximum height of the water channel near the downstream side of the rim spout (overhang part from the shelf surface of the water channel) Maximum height dimension to the bottom edge of
L1 Maximum height dimension of the waterway near the downstream side of the rim spout (maximum height dimension from the shelf surface of the waterway to the lower end of the overhang)
L2 Maximum height dimension of the waterway near the downstream side of the rim spout (maximum height dimension from the shelf surface of the waterway 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 water outlet R1 Rear side region of the bowl portion R300 Peripheral region of the rear wall portion of the guide wall portion S1 Upper end surface of the lower wall portion of the outer portion of the rim water passage Bonding surface between the lower end surface of the inner wall portion and the inner wall portion S2 Bonding surface between the upper end surface and the upper wall portion of the outer wall portion of the outer side of the rim water passage Thickness of the wall portion on the inner peripheral side of the rim portion in the inner portion of the rim water passage
U Minimum vertical thickness of overhang (minimum height of overhang)
U1 Minimum vertical thickness of overhang (minimum height of overhang)
U2 Minimum vertical thickness of overhang (minimum height of overhang)
W width of the water passage near the downstream side of the rim water outlet W1 width of the water passage near the downstream side of the rim water outlet W2 width of the water passage near the downstream side of the rim water outlet W3 width of the shelf surface x width from the rim water outlet Distance downstream in the circumferential direction x1 Distance downstream in the circumferential direction from the rim spout x2 Distance downstream in the circumferential direction from the rim spout x3 Distance downstream in the circumferential direction from the rim spout α1 Inclination angle of the shelf surface α2 Shelf Inclination angle of surface ρ Curvature radius of relaxation curve ρ1 Curvature radius of relaxation curve ρ2 Curvature radius of relaxation curve ρ3 Curvature radius

Claims (7)

A flush toilet that is washed with wash water supplied from a wash water source and discharges filth,
A bowl portion comprising a bowl-shaped filth receiving surface and a rim formed on the upper edge of the filth receiving surface;
A drainage channel connected to the lower part of the bowl portion to discharge filth,
A rim water spouting portion that is provided in the rim portion and spouts washing water into the bowl portion to form a swirling flow;
A water conduit that supplies cleaning water supplied from the cleaning water source to the rim water spouting unit,
The bowl portion includes a front side region that is a front side and a rear side region that is a rear side with respect to a center line extending in the left-right direction that bisects the bowl portion in the front-rear direction,
The rim water spouting portion forms a rim water passage through which the cleaning water supplied from the water conduit passes through the rim portion on either the left or right side in the front side region of the bowl portion. A rim spout is formed at the downstream end of the water passage to discharge the washing water backward,
The rim water passage includes an outer portion extending forward from the inlet portion to the inside of the rim portion, a bent portion bent inward from a downstream end of the outer portion, and the rim passing rearward from the bent portion. A flush toilet comprising an inner portion extending to a water outlet.   The height dimension (h) of the flow path cross section of the inner part of the rim water passage is set to be smaller than the height dimension (H) of the flow path cross section of the outer part. Flush toilet.   The ratio (h: H) of the height dimension (h) of the channel cross section of the inner part to the height dimension (H) of the channel cross section at the downstream end of the outer part is 1: 2 to 1: 8. The flush toilet according to claim 2, which is set as described above. The outer portion includes an outer wall portion on the outer peripheral side of the rim portion, a lower wall portion integrally formed on the inner side from the lower end of the outer wall portion, and the lower end portion of the outer wall portion facing the outer wall portion in the horizontal direction. An inner wall portion bonded to the upper end of the lower wall portion, and an upper wall portion formed integrally with the upper end of the inner wall portion and bonded to the upper end of the outer wall portion,
The bonding surface between the lower wall portion and the inner wall portion forms a substantially horizontal plane,
The flush toilet according to any one of claims 1 to 3, wherein an adhesive surface between the outer wall portion and the upper wall portion forms an inclined surface inclined with respect to the substantially horizontal plane.   The rim water spouting portion forms an overhang portion above the water passage formed near the downstream side of the rim water spouting port of the rim water passage, and is formed on the inner peripheral side of the rim portion forming the inner side portion. The flush toilet according to any one of claims 1 to 4, wherein the wall portion is formed so that a thickness thereof is narrowed toward the rim water spouting port so that a region of the overhang portion is reduced.   6. The rim water spouting port according to claim 1, wherein an opening cross section of the rim water spouting port is formed in a triangular shape, and one side of the triangular rim water spouting port forms an overhang portion. Flush toilet.   The flush toilet according to any one of claims 1 to 6, wherein a guide wall portion that guides the wash water supplied from the water conduit to the downstream side is formed on the outer side portion.

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