JP6789505B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet that cleans the toilet body with washing water.

Conventionally, a bowl portion, a rim water passage provided on the upper peripheral edge of the bowl portion, and a slit continuously opened toward the bowl portion along the upper peripheral edge of the bowl portion on the bottom side of the rim water passage have been provided. There is known a flush urinal with an open rim structure that includes a rim portion and a swirling flow on the filth receiving surface of the bowl portion (see, for example, Patent Document 1). A flush toilet with an open rim structure has the advantage that it can be manufactured at a relatively low cost because of its simple structure. Further, in a flush toilet having an open rim structure as shown in Patent Document 1, a swirling flow is formed on the sewage receiving surface of the bowl portion by the washing water discharged from the slit, so that the sewage receiving surface can be made even with a small amount of washing water. Can be thoroughly washed.

Japanese Unexamined Patent Publication No. 2004-238891

However, in the above-mentioned conventional flush toilet with an open rim structure, since slits are provided on the entire circumference along the upper peripheral edge of the rim portion, the slits provided on the upper peripheral edge behind the bowl portion can also be formed on the bowl portion. Washing water is discharged toward. Therefore, there is a concern that the washing water flowing down from the slit provided on the upper peripheral edge behind the bowl portion and the washing water swirling around the filth receiving surface collide with each other behind the bowl portion, and the collided water tends to be splashed. .. Furthermore, from the viewpoint of water saving, which has been required for toilet bowls in recent years, if the force of the washing water that swirls the filth receiving surface is increased in order to maintain the washing power while reducing the amount of the washing water, the water collision becomes severe. , There is a risk that the droplets will fly more easily. Further, since the rear part of the bowl portion is located near the user's anus when the user sits on the flush toilet, filth and the like scattered behind the bowl portion are likely to adhere. Therefore, there is a concern that filth or the like may enter the rim water passage or the like through the slit provided on the upper peripheral edge behind the bowl portion.

As a solution to this, a structure is conceivable in which a separate member such as a distributor is provided behind the flush toilet to form a swirling flow on the filth receiving surface and prevent the flush water from being discharged from the slit behind the bowl portion. However, if a distributor or the like is provided as a separate member, there is a concern that the manufacturing cost will increase and the productivity will decrease. This is contrary to the merit of flush toilets with an open rim structure, which can be manufactured at a relatively low cost.

The present invention has been made to solve the above-mentioned problems, and while suppressing splashes generated when water flowing through the bowl portion collides with water flowing down from a slit in the rim portion, the inside of the rim water passage, etc. The purpose is to provide a flush toilet that can maintain the cleanliness of the toilet.

In order to achieve the above object, according to the flush toilet according to one aspect of the present invention, in the flush toilet that cleans the toilet body with wash water, a water supply device that supplies wash water to the supply port of the toilet body and a water supply device. A bowl portion having a bowl-shaped filth receiving surface, a rim portion formed along the upper edge portion of the filth receiving surface, and a rim water passage formed inside the rim portion to guide washing water, and a supply port. A connecting headrace that connects to the rim waterway, a washer that is formed along the rim and opens the sewage receiving surface side of the rim waterway, and a rim part on the rear side of the toilet bowl that partially closes the slit. A swirling flow is formed on the sewage receiving surface by the washing water flowing from the rim water passage to the sewage receiving surface through the slit, and the upstream side of the rim water passage is connected to the connecting headrace, and the rim water passage is provided. The downstream end of the rim is closed, and the connection between the outer peripheral wall of the rim and the closed end of the downstream end of the rim canal is smoothly continuous along the surface of the closed. ..

According to this configuration, since the closing portion that partially closes the slit is formed in the rim portion on the rear side of the toilet bowl body, the washing water is suppressed from flowing down from the rear portion of the rim portion. Therefore, it is suppressed that the washing water flowing down from the rear part of the rim part toward the lower part of the bowl part and the washing water swirling around the filth receiving surface collide with each other behind the bowl part, and the water flowing through the bowl part collides. By doing so, it is possible to suppress the droplets generated.
In addition, since a slit does not exist behind the bowl portion where filth easily adheres, that is, a closed portion is formed, it is possible to prevent scattered filth from entering the rim water passage or the connecting headrace. can do. Therefore, the cleanliness of the flush toilet can be maintained.
Since the downstream end of the rim water passage is closed, the swirling direction of the swirling flow of the filth receiving surface can be more reliably turned in one direction. Therefore, the collision between the washing waters is suppressed, and the droplets generated by the collision of the water flowing through the bowl portion can be further suppressed.
In addition, since the swirling flow that goes around the rim water passage easily flows to the surface of the closed portion, the closed portion can be cleaned evenly. Therefore, the cleanliness of the flush toilet can be maintained.
Since the connection portion between the downstream end of the rim passage and the closed portion is smoothly continuous along the surface of the closed portion, the washing water flowing from the slit at the downstream end of the rim passage to the filth receiving surface is blocked. It becomes easier to flow to the surface of the part. As a result, the closed portion can be washed evenly, and the swirling property of the swirling flow formed on the filth receiving surface can be improved.

Further, in the flush toilet according to one aspect of the present invention, the surface of the closed portion is preferably a wall surface in the vertical direction.

According to this configuration, since the surface of the closed portion is a wall surface in the vertical direction, the washing water flowing through the closed portion easily flows below the bowl portion. Therefore, it is possible to prevent the washing water flowing through the closed portion from being scattered outside the bowl portion.
Further, since the surface of the closed portion is a wall surface in the vertical direction, the mold for forming the closed portion can have a simple structure. Therefore, a flush toilet can be manufactured at a lower cost.

Further, in the flush toilet according to one aspect of the present invention, preferably, the lower end of the wall portion on the inner peripheral side of the rim portion is located on the outer peripheral side of the rim portion with respect to the upper edge portion of the dirt receiving surface, and the rim portion. The upper end of the wall portion on the inner peripheral side of the toilet is located on the outer peripheral side of the rim portion from the lower end of the wall portion, and the connecting headrace is formed substantially in the center of the toilet bowl body in the left-right direction.

According to this configuration, the lower end of the wall portion on the inner peripheral side of the rim portion is located on the outer peripheral side of the rim portion rather than the upper edge portion of the dirt receiving surface, and the upper end of the wall portion on the inner peripheral side of the rim portion is located. Since it is located on the outer peripheral side of the rim portion from the lower end and the connecting headrace is formed substantially in the center of the flush toilet in the left-right direction, the flush toilet can be formed by a simple mold configuration. Therefore, a flush toilet can be manufactured at a lower cost.

Further, in the flush toilet according to one aspect of the present invention, preferably, the closed portion is an inflection point of the curvature of the rim portion in the region rearward from the portion where the width of the toilet body in the left-right direction is maximized. It is formed behind.

According to this configuration, the closed portion is formed in the region on the rear side of the portion where the width of the toilet bowl body is maximized in the left-right direction, and is formed behind the inflection point of the curvature of the rim portion. A slit can be formed in the front. As a result, the washing water discharged from the slit can be evenly distributed over the entire filth receiving surface. Therefore, it is possible to evenly clean the entire filth receiving surface while suppressing the ingress of scattered filth into the rim waterway or the connecting headrace, and it is possible to maintain the cleanliness of the flush toilet. it can.

Further, in the flush toilet according to one aspect of the present invention, preferably, the connecting headrace is an upstream canal extending from the supply port to one of the left and right directions of the toilet body, and left and right from the upstream canal. It has a downstream channel portion extending to the other side of the direction.

According to this configuration, the connecting headrace is an upstream canal extending from the supply port to one side of the toilet body in the left-right direction and a downstream canal extending from the upstream canal to the other side in the left-right direction. It has a part and. As a result, the washing water flows into the downstream waterway from the upstream waterway that extends to one side of the toilet body in the left-right direction, and flows into the downstream waterway along the downstream waterway to the other side in the left-right direction. Is guided over a relatively long length. As a result, the force of the washing water flowing from the downstream side water channel portion toward the rim water passage is strengthened, and the flow for turning the rim water passage is easily formed. Therefore, the force of the washing water that tries to turn the rim water passage can be strengthened, and the bowl portion can be sufficiently washed.

According to the present invention, in a flush toilet, cleanliness can be maintained while suppressing droplets generated by collision of water flowing in the bowl portion.

It is a top view of the flush toilet which concerns on one Embodiment of this invention. It is sectional drawing seen along the line II-II of FIG. It is sectional drawing seen along the line III-III of FIG. It is sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is sectional drawing which shows the type-matched state of each type used for manufacturing the toilet body body which concerns on one Embodiment of this invention. It is sectional drawing seen along the line VII-VII of FIG. It is sectional drawing which shows the type-matched state of each type used for manufacturing the toilet body body which concerns on one Embodiment of this invention. It is sectional drawing which shows the molded state of each type used for manufacturing the conventional toilet body. It is a partially enlarged view of the region A shown in FIG. It is a schematic diagram which showed the flow of water of the flush toilet which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.

<Composition of flush toilet>
First, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the following, the directions shown in the drawings will be used for description.

FIG. 1 is a top view of a flush toilet according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

As shown in FIGS. 1 and 2, the flush toilet 1 includes a toilet body 2 made of pottery or the like, and a tank device 4 which is a washing water source. The tank device 4 is mounted above the rear side of the toilet bowl main body 2 and is connected to a water supply source (not shown) such as a water supply. When the operation lever, remote controller (not shown), or the like of the tank device 4 is operated, the washing water is supplied from the tank device 4 to the supply port 6 opened on the upper surface on the central rear side of the toilet body 2.
In this embodiment, the tank device 4 functions as a water supply device.

A bowl portion 8 for discharging filth and the like is formed on the front side of the toilet bowl main body 2, and a water storage portion 10 is formed below the bowl portion 8. A predetermined amount of pooled water is formed in the pooled water portion 10. The water level W0 shown in FIG. 2 is the initial water level of the accumulated water. An inlet 12a of a drain trap pipeline 12 for discharging filth or the like to the outside of the flush toilet 1 is connected to the lower end of the water reservoir 10. The drain trap pipeline 12 extends rearward from its inlet 12a, and its outlet 12b is connected to a drain pipe (not shown) installed on the floor surface.

The bowl portion 8 has a substantially egg shape as a whole when viewed from above. Further, the bowl portion 8 is a bowl-shaped filth receiving surface 14, a rim portion 16 formed along the upper edge portion of the filth receiving surface 14, and a rim passage formed inside the rim portion 16 to guide cleaning water. It has a water channel 18.

The filth receiving surface 14 is formed in a tapered shape so as to gradually spread from the lower edge portion to the upper edge portion thereof. In other words, the filth receiving surface 14 in the vertical cross section is formed so as to gradually expand from the lower edge portion to the upper edge portion of the filth receiving surface 14 (see FIGS. 2 and 4).

The rim portion 16 is formed in an annular shape along the upper edge portion of the filth receiving surface 14, and a rim water passage 18 is formed inside the rim portion 16. Further, the rim portion 16 includes a rim inner side wall 20 which is a wall portion on the inner peripheral side thereof, a rim outer wall 22 which is a wall portion on the outer peripheral side, a rim upper side wall 24 which is an upper wall portion, and a lower side. It has a rim lower side wall 26 which is a wall portion, and the space partitioned by these is a rim water passage 18.

The upstream side of the rim water passage 18 is connected to a connecting water channel 32 described later. The rim water passage 18 is formed so as to go around from the upstream end portion along the rim portion 16, and the downstream end portion of the rim water passage 18 is the flow direction of the washing water flowing in the rim water passage 18. Is blocked.

The lower side wall 26 of the rim is formed so as to extend in the outer peripheral direction from the upper edge portion of the dirt receiving surface 14, and the outer rim wall 22 extends upward from the outer peripheral end portion thereof. Further, the rim upper side wall 24 extends horizontally from the upper end portion of the rim outer wall 22 toward the inner peripheral direction (the direction from the rim portion 16 toward the dirt receiving surface 14 in the top view). Then, the rim inner side wall 20 extends downward from the inner peripheral end portion of the rim upper side wall 24. That is, in the cross section of the flow path of the rim water passage 18, the rim portion 16 has a substantially rectangular shape due to the rim lower side wall 26, the rim outer wall 22, the rim upper side wall 24, and the rim inner side wall 20.

Further, the lower end of the inner side wall 20 of the rim is located on the outer peripheral side of the rim portion 16 with respect to the upper edge portion of the dirt receiving surface 14. Further, the upper end of the rim inner side wall 20 is located on the outer peripheral side of the rim portion 16 with respect to the lower end of the rim inner side wall 20. In other words, the inner side wall 20 of the rim is formed in a tapered shape so that the diameter gradually narrows from the upper end to the lower end.
The tapered portion of the rim inner side wall 20 is a portion that forms a slit 28, which will be described later, together with the upper edge portion of the dirt receiving surface 14, and the rim inner side wall 20 has a closed portion, which will be described later. The portion 30 is formed so as to extend in the vertical direction. Further, the rim inner side wall 20 may be formed so as to extend vertically from the upper end to the lower end on the entire circumference of the rim portion 16.

Further, the connecting portion between the rim outer wall 22 and the rim lower side wall 26 is formed at a position above the connecting portion between the upper edge portion of the dirt receiving surface 14 and the rim lower side wall 26. That is, the lower side wall 26 of the rim is inclined downward from the outer peripheral side to the inner peripheral side of the rim portion 16. In other words, the upper surface of the lower side wall 26 of the rim forming the lower surface of the flow path of the rim water passage 18 is inclined downward in the direction from the rim portion 16 toward the dirt receiving surface 14.

As shown in FIGS. 3 and 4, a slit 28 is formed in the rim portion 16 along the rim portion 16 between the rim water passage 18 and the upper edge portion of the filth receiving surface 14. The slit 28 is a gap provided between the lower end of the rim inner side wall 20 and the upper edge portion of the sewage receiving surface 14 (the portion on the inner peripheral side of the rim lower side wall 26), and is a sewage receiving channel 18 of the rim water passage 18. The surface 14 side is opened. That is, the slit 28 communicates the internal space of the rim portion 16 with the space on the filth receiving surface 14. The slit 28 is continuously formed along the rim portion 16 (along a substantially "U" shape in a plan view) in a portion excluding the rear portion of the rim portion 16. The slit 28 is a variation of the curvature of the rim portion 16 in the portion where the width of the rim portion 16 is maximized in the left-right direction, that is, the region rearward of the portion where the width of the toilet bowl body 2 is maximized in the left-right direction. It is formed in front of the point. The washing water flowing through the rim water passage 18 is discharged from the slit 28 to the filth receiving surface 14. Then, a swirling flow is generated on the filth receiving surface 14 by the washing water flowing from the rim water passage 18 through the slit 28 to the filth receiving surface 14.

Further, the rim portion 16 on the rear side of the toilet bowl body 2 is provided with a closing portion 30 that partially closes the slit 28. The surface of the closed portion 30 is a wall surface in the vertical direction (see FIG. 2).
The closing portion 30 is a portion of the maximum width H where the width of the rim portion 16 in the left-right direction is maximized, that is, a region rearward of the portion of the maximum width H where the width of the toilet bowl body 2 is maximized in the left-right direction. Inside, it is formed behind the inflection point of the curvature of the rim portion 16 (see FIG. 1). That is, in the rim portion 16, in the region rearward from the portion where the width of the rim portion 16 in the left-right direction is maximized, the function as a spout is located behind the inflection point of the curvature of the rim portion 16. The slit 28 having the above is not formed. Here, the inflection point of the curvature of the rim portion 16 is the right side portion and the left side portion of the rim portion 16 having a relatively large radius of curvature in the top view, and the rim portion 16 having a relatively small radius of curvature in the top view. It is a connection point with the rear (or front). The substantially oval shape along the inner circumference of the rim portion 16 in a plan view is roughly divided into three portions, a rear portion, an intermediate portion, and a front portion of the rim portion 16 as portions having different radii of curvature in the front-rear direction. Be done. That is, each of these three parts is a curve having a substantially constant radius of curvature. In this substantially egg-shaped shape, the radius of curvature increases in the order of the front part, the rear part, and the middle part. The inflection point of the curvature of the rim portion 16 here is the point where the curvature (radius of curvature) changes in the above-mentioned substantially oval shape, and corresponds to the boundary point between the rear portion and the intermediate portion having different curvature radii. To do.

Further, the connecting portion between the downstream end portion of the rim water passage 18 and the closing portion 30 is smoothly continuous along the surface of the closing portion 30. More specifically, the inner surface of the rim outer wall 22 at the downstream end of the rim water passage 18 is formed continuously with the filth receiving surface 14 and the closing portion 30 which is a surface portion exposed on the surface. Then, in the top view, the closing portion 30 is formed so as to draw a smooth curve from the rim outer wall 22 at the downstream end of the rim water passage 18 to the surface of the closing portion 30. That is, in the rear part on the left side of the rim portion 16 forming the rim passage 18 in which the flow direction of the washing water is counterclockwise in a plan view, the rim outer wall 22 which is the wall portion on the outer peripheral side of the rim portion 16 passes through the rim. The inner wall surface, which is the outer peripheral surface of the water channel 18, is exposed to the surface so that the wall surface forms a curved surface continuous with the surface of the closing portion 30.

A connecting headrace 32 extending forward from the supply port 6 and connecting to the rim waterway 18 is formed in the upper part on the rear side of the toilet body 2. That is, the washing water that has flowed into the supply port 6 flows into the rim water passage 18 through the connecting water passage 32. Further, the connecting headrace 32 extending forward from the supply port 6 has an upstream waterway portion 34 extending from the supply port 6 to one side in the left-right direction of the toilet body 2 and an upstream waterway portion 34 as its path portion. It has a downstream water channel portion 36 extending from the portion 34 to the other side in the left-right direction. In other words, the connecting headrace 32 has a "dogleg" shape as a whole (as another example, a boomerang shape or an L shape) due to the upstream side waterway portion 34 and the downstream side waterway portion 36 in the top view. It has an inclined shape). In the present embodiment, the upstream water channel 34 extends diagonally forward to the left of the toilet body 2 from the supply port 6, and the downstream water channel 36 extends diagonally forward to the right from the downstream end of the upstream water channel 34. Extends to. As described above, the connecting headrace 32 extending forward from the supply port 6 located substantially in the center of the left and right is once detoured to the left front side and then extended to the right front side, and is connected to the rim waterway 18. Further, the connecting headrace 32 is connected to the rim waterway 18 located on the back side of the closing portion 30. As a result, the water flowing from the connecting headrace 32 does not flow directly from the connecting headrace 32 to the bowl portion 8 with the back surface side of the closing portion 30 forming an inclined wall. Therefore, water droplets are less likely to occur at the rear portion of the bowl portion 8.

The downstream end of the downstream waterway portion 36 is connected to the upstream end of the rim passage 18, that is, the right rear end of the rim portion 16. Further, the downstream water channel portion 36 is formed so as to substantially overlap the tangent line at the upstream end portion of the rim water channel 18 in the top view. That is, with respect to the right rear portion of the rim channel 18 that generally follows a substantially egg-shaped shape in a plan view, the downstream channel portion 36 that extends substantially linearly in the right diagonal direction from the rear side to the front side rims the flow path direction. It is provided so as to be continuous in the tangential direction with respect to the annular flow path of the water passage 18. Further, the channel length of the downstream channel portion 36 is formed to be longer than the channel length of the upstream channel portion 34.

As described above, the connecting headrace 32 is not directly extended from the supply port 6 to the connection point with respect to the rim waterway 18, but passes through the upstream waterway portion 34 as a detour, and then the rim waterway 18 is reached. A downstream waterway portion 36 connected in the tangential direction to the rim waterway portion 18 is connected to the rim waterway 18. As a result, the path length of the downstream water channel 36 connected in the tangential direction to the rim water channel 18 can be lengthened, and the force of the washing water flowing from the downstream water channel 36 toward the rim water channel 18 is strengthened. Further, a flow for turning the rim water passage 18 is likely to be formed. Therefore, the force of the washing water that tries to turn the rim water passage 18 can be strengthened, and the bowl portion 8 can be sufficiently washed.

<Manufacturing method of toilet bowl body>
Next, a method for manufacturing the toilet bowl body according to the embodiment of the present invention will be described with reference to FIGS. 5 to 10.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a cross-sectional view showing a state in which each type used for manufacturing the toilet bowl body according to the embodiment of the present invention is matched. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a cross-sectional view showing a state in which each type used for manufacturing the toilet bowl body according to the embodiment of the present invention is matched. FIG. 9 is a cross-sectional view showing a state in which each type used for manufacturing a conventional toilet bowl body is matched. FIG. 10 is a partially enlarged view of the region A shown in FIG.

Note that FIG. 6 shows a cross section at the same position as the cross section of the flush toilet in FIG. 5, and FIG. 8 shows a cross section at the same position as the cross section of the flush toilet in FIG.

As shown in FIGS. 5 and 6, the mold required for manufacturing the toilet bowl main body 2 is between the upper mold 40, the bottom mold 42 arranged below the upper mold 40, and the upper mold 40 and the bottom mold 42. The right side type 44 and the left side type 46 are arranged on the left and right sides.
The upper mold 40 has a shape that matches the shape of the upper surface of the toilet bowl body 2 and the inner wall shape of the bowl portion 8, and the bottom mold 42 has a shape that matches the shape of the lower surface of the toilet bowl body 2. The right side type 44 and the left side type 46 have a shape suitable for the outer wall surface on the side of the toilet bowl body 2.

As a method of manufacturing the toilet bowl body 2, first, each type is combined. When the molds are combined, a cavity 48 is formed inside the mold. In this way, after the cavity 48 forming the base material of the toilet bowl body 2 is formed by the upper mold 40, the bottom mold 42, the right side mold 44, and the left side mold 46, the slurry is poured into the cavity 48. Then, after sucking air from the mold surface of each mold, the mixture is left for a predetermined time to deposit slurry on the mold surface of each mold. After that, the mud of the slurry is discharged from the cavity 48, the soil of the accumulated slurry is tightened, and finally, the die is cut out. Here, since the mold can be pulled out in only one direction, the upper mold 40 is upward, the bottom mold 42 is downward, the right mold 44 is in the viewing direction, and the left mold 46 is in the left direction. Pull out. In this way, the base material of the toilet bowl body 2 is obtained.
The slit 28 is formed by cutting after obtaining the base material of the toilet bowl body 2.

After obtaining the base material of the toilet bowl main body 2, the base material is dried and further the base material is fired. In this way, the toilet bowl main body 2 in the present embodiment is generated.

Here, in the rim portion 16, since the surface of the closing portion 30 is a wall surface in the vertical direction (see FIG. 2), the mold for forming the surface of the closing portion 30, that is, the upper mold 40 has a simple structure. be able to. Therefore, the flush toilet 1 can be manufactured at a lower cost.

Further, as shown in FIGS. 7 and 8, a connecting headrace 32 is formed at substantially the center of the upper part of the toilet bowl body 2 in the left-right direction. The connecting headrace 32 is formed by the upper die 40, the right die 44, and the left die 46. Further, the flow path width of the connecting headrace 32 can be adjusted by adjusting the width between the right side mold 44 and the left side mold 46.
The outlet 12b of the drain trap pipeline 12 is formed by cutting after obtaining the base material of the toilet bowl main body 2, similarly to the slit 28.

As described above, the connecting headrace 32 is formed substantially in the center of the toilet body 2 in the left-right direction. Further, as described above, the lower end of the rim inner side wall 20 is formed so as to be located on the outer peripheral side of the rim portion 16 with respect to the upper edge portion of the dirt receiving surface 14, and the upper end of the rim inner side wall 20 is the rim. It is formed so as to be located on the outer peripheral side of the rim portion 16 with respect to the lower end of the inner side wall 20. Therefore, the toilet bowl main body 2 can be formed only by the mold configuration of the upper mold 40, the bottom mold 42, the right mold 44, and the left mold 46 while narrowing the flow path width of the connecting headrace 32. Therefore, the flush toilet 1 can be manufactured at a lower cost.

Here, as shown in FIG. 9, the connecting headrace 32 is not formed substantially in the center of the flush toilet bowl 1 (toilet bowl body 2) in the left-right direction, that is, the connecting headrace 32 is located in the left-right direction of the toilet bowl body 2. When formed along the end on one side (right side in the illustrated example), the middle mold 50 is required in addition to the upper mold 40, the bottom mold 42, the right mold 44, and the left mold 46. Specifically, since the mold can only be punched in one direction, the medium mold 50 is inserted into the cavity 48, and after the molds of the upper mold 40, the bottom mold 42, the right mold 44, and the left mold 46 are punched, the middle mold 50 is removed. Die out. As described above, in the conventional method of manufacturing the toilet bowl body 2, since the connecting headrace 32 is located on the left and right sides of the toilet bowl body 2, the upper type 40, the bottom type 42, the right side type 44, and the left side type 46 are used. In addition, since the medium size 50 is required, there is a concern that the productivity may decrease.
Here, by widening the width of the flow path in the left-right direction of the connecting headrace 32, the toilet bowl can be configured only with the upper mold 40, the bottom mold 42, the right mold 44, and the left mold 46 without using the medium mold 50. There is a method of generating the base material of the main body 2. However, with this method, since the flow path width of the connecting headrace 32 is not narrowed, there is a concern that the swirlability of the washing water discharged from the slit 28 to the filth receiving surface 14 is lowered.

Further, as shown in FIG. 10, the rim water passage 18 (rim portion 16) is formed by the upper mold 40, the right side mold 44, and the left side mold 46. Specifically, the rim water passage 18 (rim portion 16) on the right side of the center line (II-II line) in the front-rear direction is formed by the upper die 40 and the right die 44. On the other hand, the rim water passage 18 (rim portion 16) on the left side of the center line (II-II line) in the front-rear direction is formed by the upper die 40 and the left die 46.

Here, a method of forming a portion where the flow direction of the rim water passage 18 is blocked, that is, a downstream end portion of the rim water passage 18 will be described.
The flow path width of the rim water passage 18 can be adjusted by changing the width L of the cavity 48 between the upper die 40 and the right die 44 (or the left die 46). Utilizing this, the upper mold 40 and the left mold forming the rim water passage 18 from the upstream side to the downstream end of the rim water passage 18 (from the front side to the rear side of the toilet bowl body 2). The width L of the cavity 48 between the surfaces of 46 is gradually reduced. When the width L of the cavity 48 forming the rim water passage 18 becomes smaller than twice the thickness of the slurry deposited on the surface of one mold, the slurry deposited on the upper mold 40 and the left mold 46, respectively. Overlap and block the downstream end of the rim channel 18. As described above, in the present embodiment, the flow path width of the rim water passage 18 is gradually narrowed toward the downstream side, so that the downstream end portion of the rim water passage 18 is finally closed. However, as a configuration for closing the downstream end of the rim water passage 18, for example, a closing part such as a barrier is provided as a part of the toilet bowl main body 2 or a separate member for the flow path of the rim water passage 18. It may be configured to block the road.

<Operation and action>
Next, the operation and operation of the flush toilet according to the embodiment of the present invention will be described with reference to FIG.

FIG. 11 is a schematic view showing the flow of water in a flush toilet according to an embodiment of the present invention.

As shown in FIG. 11, the washing water discharged from the tank device 4 to the supply port 6 of the toilet bowl main body 2 flows into the upstream water channel portion 34 of the connecting headrace 32. The washing water flowing through the upstream side waterway portion 34 of the connecting headrace 32 flows toward one side in the left-right direction of the toilet bowl main body 2 (in this embodiment, diagonally forward to the left), and then changes the direction to the downstream side waterway portion. Flow to 36. The washing water flowing in a different direction from the upstream side waterway portion 34 to the downstream side waterway portion 36 is a route of the upstream side waterway portion 34 toward the other side (in this embodiment, diagonally forward to the right) of the toilet bowl body 2 in the left-right direction. It is guided over a relatively long path relative to the length. Then, in the downstream water channel portion 36, the wash water guided over a relatively long path flows to the rim water channel 18 to form a swirling flow.

In this way, the washing water flows from the upstream water channel 34 extending from the supply port 6 to one side of the toilet bowl body 2 in the left-right direction, changing the direction and flowing into the downstream water channel 36, and into the downstream water channel 36. It is guided along a relatively long length to the other side of the left-right direction. As a result, the momentum of the washing water flowing from the downstream side water channel portion 36 toward the rim water passage 18 is strengthened, and a flow that swirls around the rim water channel 18 is easily formed. Therefore, the force of the washing water that tries to turn the rim water passage 18 can be strengthened, and the bowl portion 8 can be sufficiently washed.

The wash water guided to the rim water passage 18 flows while forming a swirling flow that goes around the rim portion 16 in a counterclockwise direction. At the same time, the washing water is discharged from the slit 28 to the filth receiving surface 14, and a swirling flow is formed on the filth receiving surface 14. In other words, the washing water flowing through the rim water passage 18 has two types, a flow from the upstream to the downstream end in the rim water passage 18, and a flow discharged from the slit 28 to the filth receiving surface 14.

Here, when imagining a configuration in which a slit 28 is formed also on the rear side of the rim portion 16 of the toilet bowl body 2, that is, a configuration in which the closed portion 30 is not formed and the slit 28 is formed over the entire circumference. In such a configuration, the washing water passing through the rim passage 18 is discharged from the rear portion of the rim portion 16 and flows down from the rear portion of the rim portion 16 toward the lower side of the bowl portion 8. In this case, there is a concern that the washing water flowing down from the rear portion of the rim portion 16 toward the lower side of the bowl portion 8 and the washing water swirling around the filth receiving surface 14 collide with each other to generate droplets.
In this regard, in the present embodiment, since the closing portion 30 that partially closes the slit 28 is formed, the washing water flows down from the rear portion of the rim portion 16 at the rim portion 16 on the rear side of the toilet bowl body 2. Is suppressed. Therefore, it is suppressed that the washing water flowing down from the rear part of the rim part 16 toward the lower part of the bowl part 8 and the washing water swirling around the filth receiving surface 14 collide with each other behind the bowl part 8 and the bowl part 8 is prevented. It is possible to suppress the droplets generated by the collision of the water flowing through the bowl.

Further, since the closing portion 30 is formed in the region rearward of the portion where the width of the toilet bowl body 2 in the left-right direction is maximum, behind the inflection point of the curvature of the rim portion 16, it is in front of the closed portion 30. Can form a slit 28. As a result, the washing water discharged from the slit 28 can be evenly distributed over the entire filth receiving surface 14. Therefore, the entire filth receiving surface 14 can be washed evenly while suppressing the scattered filth and the like from entering the rim water passage 18 and the connecting headrace 32, and the flush toilet bowl 1 is clean. Can be kept.

The wash water that has flowed from the upstream to the downstream end in the rim water passage 18 flows toward the closing portion 30 through the slit 28 at the downstream end of the rim water passage 18. The downstream end of the rim passage 18 blocks the flow of the rim passage 18, that is, the downstream end of the rim passage 18 is not connected to the connecting headrace 32, so that the filth receiving surface 14 turns. The swirling direction of the flow can be more reliably turned in one direction (counterclockwise in the present embodiment). Therefore, the collision between the washing waters is suppressed, and the droplets generated by the collision of the washing water flowing in the bowl portion 8 can be further suppressed. Further, since the swirling flow that goes around the rim water passage 18 from the upstream to the downstream end easily flows to the surface of the closed portion 30, the closed portion 30 can be cleaned evenly. Therefore, the cleanliness of the flush toilet 1 can be maintained.

Further, since the connecting portion between the downstream end portion of the rim water passage 18 and the closing portion 30 is smoothly continuous along the surface of the closing portion 30, dirt is received from the slit 28 at the downstream end portion of the rim water passage 18. The washing water flowing to the surface 14 easily flows to the surface of the closed portion 30. As a result, the closed portion 30 can be washed evenly, and the swirling property of the swirling flow formed on the filth receiving surface 14 can be improved.

Further, since the surface of the closed portion 30 is a wall surface in the vertical direction, the washing water flowing on the surface of the closed portion 30 is less likely to run upward and easily flows downward of the bowl portion 8. Therefore, it is possible to prevent the washing water flowing through the closed portion 30 from being scattered outside the bowl portion 8.
If the surface of the closed portion 30 is overhanging, the washing water flowing through the closed portion 30 is prevented from being scattered outside the bowl portion 8, but the closed portion 30 is formed. There is a concern that the mold configuration will be complicated and the productivity will decrease. On the contrary, when the surface of the closing portion 30 is an inclined surface that inclines outward from the lower side to the upper side, the structure of the mold for forming the closing portion 30 can be simplified, but the surface of the closing portion 30 can be formed. There is a concern that the flowing wash water tends to run upward and the wash water is scattered outside the bowl portion 8.
By making the surface of the closed portion 30 a wall surface in the vertical direction as in the present embodiment, the washing water flowing on the surface of the closed portion 30 can be moved upward while simplifying the structure of the mold for forming the closed portion 30. It can be difficult to run up toward.

The washing water flowing on the surface of the closed portion 30 merges with the washing water discharged from the slit 28 to the filth receiving surface 14, and flows down to the water collecting portion 10 while forming a swirling flow in the bowl portion 8.
Then, the washing water flowing down to the reservoir 10 flows to the drain trap pipeline 12 together with filth and the like, and from the outlet 12b of the drain trap pipeline 12 to the drain pipe (not shown) arranged on the floor surface. It is discharged.

<Modification example>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

For example, the configuration in which the swirling flow formed on the filth receiving surface 14 swirls counterclockwise has been described, but even if the toilet body 2 is configured so that the swirling flow formed on the filth receiving surface 14 swirls clockwise. Good.

Further, the toilet bowl body 2 may be formed of, for example, resin or the like.

Further, the connecting headrace 32 is an upstream waterway portion 34 extending from the supply port 6 to one side in the left-right direction of the toilet bowl body 2, and a downstream side extending from the upstream side waterway portion 34 to the other side in the left-right direction. Although the configuration having the water channel portion 36 has been described, the configuration is not limited to this configuration when the downstream end portion of the rim water passage portion 18 is closed, that is, when a swirling flow can be formed. For example, in the top view, the connecting headrace 32 may be formed so as to extend substantially linearly from the supply port 6 toward the rim waterway 18.

Further, although the configuration has been described in which the connection portion between the downstream end portion of the rim water passage 18 and the closing portion 30 is smoothly continuous along the surface of the closing portion 30, the configuration is not limited to this. For example, the connection portion between the downstream end of the rim water passage 18 and the closing portion 30 may be formed in a stepped manner so that the washing water flowing through the downstream end of the rim water passage 18 is dropped into the water reservoir 10. ..

The elements included in each of the above-described embodiments can be combined as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

1 Flush toilet 2 Toilet body 4 Tank device (water supply device)
6 Supply port 8 Bowl part 10 Reservoir part 12 Drain trap pipeline 12a Inlet 12b Exit 14 Sewage receiving surface 16 Rim part 18 Rim waterway 20 Rim inner side wall 22 Rim outer wall 24 Rim upper side wall 26 Rim lower side wall 28 Slit 30 Closure Part 32 Connecting headrace 34 Upstream side waterway part 36 Downstream side waterway part 40 Top type 42 Bottom type 44 Right type 46 Left type 48 Cavity 50 Medium size H Maximum width of rim part L Cavity width W0 Initial water level

Claims (5)

In a flush toilet that cleans the toilet body with wash water
A water supply device that supplies wash water to the supply port of the toilet bowl body,
A bowl portion having a bowl-shaped filth receiving surface, a rim portion formed along the upper edge portion of the filth receiving surface, and a rim water passage formed inside the rim portion to guide washing water.
A connecting headrace that connects the supply port to the rim headrace,
A slit formed along the rim portion and opening the sewage receiving surface side of the rim water passage,
A rim portion on the rear side of the toilet bowl body includes a closing portion that partially closes the slit.
A swirling flow is formed on the filth receiving surface by the washing water flowing from the rim water passage through the slit to the filth receiving surface.
The upstream side of the rim waterway is connected to the connecting waterway, and the downstream end of the rim waterway is closed.
A flush toilet in which the connecting portion between the wall portion on the outer peripheral side of the rim portion at the downstream end of the rim water passage and the closing portion is smoothly continuous along the surface of the closing portion. The flush toilet according to claim 1, wherein the surface of the closed portion is a wall surface in the vertical direction. The lower end of the wall portion on the inner peripheral side of the rim portion is located on the outer peripheral side of the rim portion with respect to the upper edge portion of the dirt receiving surface, and the upper end of the wall portion is closer to the lower end of the wall portion. Located on the outer peripheral side of the rim,
The flush toilet according to claim 2, wherein the connecting headrace is formed substantially in the center of the toilet body in the left-right direction. Claims 1 to claim that the closed portion is formed behind the inflection point of the curvature of the rim portion in the region rearward of the portion where the width of the toilet bowl body in the left-right direction is maximized. The flush toilet according to any one of 3. The connecting headrace includes an upstream waterway portion extending from the supply port to one side in the left-right direction of the toilet bowl body, and a downstream waterway portion extending from the upstream side waterway portion to the other side in the left-right direction. The flush toilet according to any one of claims 1 to 4, wherein the flush toilet has.

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