JP2018053460A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl excellent in manufacturability and cleanability while its rear end side made cleanable with powerful washing water.SOLUTION: The flush toilet bowl equipped with a rim spout that discharges washing water in a manner of allowing it to swirl in the horizontal direction, comprises a bowl part with an excrement receiving face formed inside and a drain trap pipeline formed on the bottom part thereof, a rim part connected to the upper end of the bowl part, a rim water passage formed inside the rim part with its downstream end communicating with the rim spout, and a conduit formed behind the rim part to supply the rim water passage with washing water fed from outside. The rim water passage is formed in a manner of passing through the front end of the rim part, and the washing water discharged from the rim spout swirls toward the front end of the rim part via the rear end of the rim part. The inner diameter of the flush toilet bowl is equal to or greater than that of the upper end of the bowl part, and the rim part is formed in a manner of protruding to outside relative to the inner face of the bowl part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flush toilet equipped with a rim spout for discharging wash water so as to turn in the horizontal direction.

  2. Description of the Related Art Conventionally, a rim spout for discharging wash water so as to turn in a horizontal direction is known. In this flush toilet, the wash water discharged from the rim spout performs washing while swirling the inner surface of the bowl portion, so the shape of the rim portion is simple, dirt does not collect easily, and it is excellent for cleaning. In recent years, it has spread rapidly. In addition, in order to improve the cleaning performance of the cleaning water discharged from the rim spout, the cleaning water is discharged from the front to the rear, and the strong cleaning water is supplied to the rear end side of the bowl portion. Has been proposed (see, for example, Patent Document 1).

JP 2010-255316 A

  In the flush toilet described in Patent Document 1, the rim water passage is formed through the front end of the rim portion, and the wash water discharged from the rim spout is rim through the rim portion rear end. Because it turns toward the front end of the section, it is possible to supply strong washing water to the rear end of the rim, and it is possible to improve the cleaning performance of filth during stool attached to the rear end side of the flush toilet Since the rim part formed inside the rim water passage is formed so as to bulge toward the inside of the bowl part, the inner diameter of the rim part is smaller than the inner diameter of the bowl part, Therefore, the rim part and the bowl part cannot be molded integrally, and it is necessary to bond the rim part and the bowl part after molding separately, increasing the number of manufacturing steps, and the bottom surface of the rim water passage Since it is hidden from above, it is on the bottom of the rim water passage. Cleaning of wearing the dirt there has been a problem that it is troublesome.

  The present invention has been made to solve the above-described problems, and provides a flush toilet with excellent manufacturability and cleanability while the rear end side of the flush toilet can be washed with strong washing water. For the purpose.

  In order to achieve the above object, the flush toilet according to the present invention is a flush toilet equipped with a rim spout for spouting flush water so as to turn in the horizontal direction, and has a filth receiving surface formed on the inner side. A rim water passage having a bowl portion in which a drain trap pipe is formed and a rim portion connected to the upper end of the bowl portion, and a rim water passage formed in the rim portion and having a downstream end connected to a rim spout, and a rim portion The rim water passage is formed through the front end of the rim portion, and the wash water discharged from the rim water outlet is formed at the rear of the rim water passage. In the flush toilet that swivels toward the front end of the rim portion via the rear end of the rim portion, the inner diameter of the rim portion is equal to or larger than the inner diameter of the upper end of the bowl portion, and the rim portion bulges outward from the inner side surface of the bowl portion. It is characterized by being formed.

According to this configuration, the inner diameter of the rim portion is equal to or larger than the inner diameter of the upper end of the bowl portion, and the rim portion is formed to bulge outward from the inner surface of the bowl portion. The upper mold that molds the side surface can be pulled upward, and the bowl part and the rim part can be integrally molded by this upper mold, the left and right horizontal molds, and the lower mold, which improves the productivity. it can.
In addition, since the inner diameter of the rim portion is equal to or larger than the inner diameter of the upper end of the bowl portion, the inner surfaces of the bowl portion and the rim portion are all exposed in a top view, so that a flush toilet with excellent cleaning properties can be provided.

  In the flush toilet according to the present invention, preferably, the water conduit is formed to bend toward the other side after going from the center of the flush toilet toward the rim spout side.

  According to this configuration, it is possible to suppress the bending at the entrance of the water conduit and the rim water passage, and to smoothly flow from the water conduit to the rim water passage, the flow rate of the cleaning water flowing through the rim water passage can be increased. In addition, it is possible to perform water discharge while ensuring a suitable water flow and flow rate for cleaning the bowl by turning the bowl from the rim spout.

  In the flush toilet according to the present invention, preferably, at the upper end of the rim portion, a plate-shaped ridge portion is formed on a part of the downstream side of the rim spout.

  According to this configuration, the initial wash water discharged from the rim spout has a large water flow and water volume and may scatter from the upper end of the rim portion, but the spear can prevent the scatter. (In addition, since the heel part may be formed on a part of the rim part, it can be formed by pasting a faucet toilet with a mold and then attaching a plate-like member without changing the mold of the molding. Can be manufactured.)

  In the flush toilet according to the present invention, preferably, in the vicinity of the rim water outlet of the rim water passage, the outer peripheral wall of the rim water passage gradually increases in curvature toward the inside.

  According to this configuration, of the wash water flowing through the rim water passage, the flow along the outer peripheral wall of the rim water passage whose flow velocity is increased by centrifugal force is gradually increased toward the inside of the rim portion downstream from the rim water spouting port. The direction can be changed, the wash water discharged from the rim spout can be smoothly swung along the inside of the rim portion, and a swirl flow with reduced water jump can be formed.

  According to the present invention, it is possible to integrally mold the bowl portion and the rim portion by the upper die, the left and right horizontal die, and the lower die, and it is possible to improve the manufacturability, and the bowl portion and the rim portion in a top view. Since all the inner surfaces of the urine are exposed, it is possible to provide a flush toilet with excellent cleanability in combination with the absence of unevenness due to the joining of the rim portion and the bowl portion.

It is a top view of the flush toilet of FIG. It is sectional drawing in the AA line of the flush toilet of FIG. It is sectional drawing in the BB line of the flush toilet of FIG. It is sectional drawing in the CC line of the flush toilet of FIG. It is sectional drawing in the DD line of the flush toilet of FIG. It is an enlarged view of the area | region E shown in FIG. It is the schematic diagram showing the flow of the water of the flush toilet concerning one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

  First, with reference to FIGS. 1-7, the flush toilet concerning one Embodiment of this invention is demonstrated. In the following description, the directions shown in the figure are used.

  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 line AA in FIG. FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along line CC in FIG. FIG. 5 is a cross-sectional view taken along line DD in FIG. FIG. 6 is an enlarged view of a region E shown in FIG. FIG. 7 is a schematic view showing the flow of water in the flush toilet according to one embodiment of the present invention.

<Outside overview of flush toilet 1>
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 as a washing water source. The tank device 4 is placed above the rear side of the toilet body 2 and is connected to a water supply source (not shown) of the water supply. When an operation lever, a remote controller (not shown), or the like of the tank device 4 is operated, the cleaning water is supplied from the tank device 4 to the water supply port 6 opened on the upper surface on the middle rear side of the toilet body 2.
In the present embodiment, the tank device 4 functions as a water supply device.

<Internal outline of toilet body 1>
On the front side of the toilet body 2 is formed a bowl portion 8 into which dirt and the like are discharged, and below this bowl portion 8 is formed a reservoir 10. A predetermined amount of water is formed in the water storage unit 10. In addition, the water level W0 shown in FIG. 2 is an initial water level of stored water. Connected to the lower end of the water reservoir 10 is an inlet 12a of a drain trap pipe 12 for discharging filth etc. to the outside of the flush toilet 1. The drain trap pipe 12 extends rearward from the inlet 12a, and the outlet 12b is connected to a discharge pipe (not shown) installed on the floor surface.

<Outline of bowl part 8>
The bowl portion 8 has a substantially egg shape as a whole when viewed from above. The bowl portion 8 includes a bowl-shaped filth receiving surface 14, a shelf portion 15 extending substantially horizontally from the upper end of the filth receiving surface 14, and a rim portion 16 formed to be connected along the upper end of the shelf portion 15. And a rim water passage 18 formed inside the rim portion 16 for guiding the cleaning water.

<Outline of waste receiving surface 14>
The filth receiving surface 14 is formed in a tapered shape so as to gradually expand from the lower edge portion toward the upper edge portion. In other words, the filth receiving surface 14 in the longitudinal 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 FIG. 2) And the shelf 15 formed so as to be continuous with the filth receiving surface 14 is formed so as to be inclined so that the inner periphery is lower than the outer periphery. For this reason, the wash water flowing along the shelf surface of the shelf portion 15 can be caused to flow down to the filth receiving surface 14 at each part of the turning path of the shelf portion 15.

<Outline of rim 16>
As shown in FIGS. 3, 4, and 5, the rim portion 16 is formed in an annular shape along the upper end of the shelf portion 15, and a rim water passage 18 is formed therein. The rim portion 16 includes a rim inner wall 20 that is an inner peripheral wall portion, a rim outer wall 22 that is an outer peripheral wall portion, a rim upper side wall 24 that is an upper wall portion, and a lower side wall portion. It has a rim lower side wall 26 that is a wall portion, and a space partitioned by these serves as a rim water passage 18.

<Outline of Rim Waterway 18>
The upstream side of the rim water passage is connected to a water conduit 32 described later. The rim water passage 18 is formed from the upstream end to the rim rear end along the rim 16 through the rim front, and the rim water passage 18 has a rim passage at the downstream end. A rim spout 30 for discharging the wash water flowing in the water channel 18 so as to turn in the horizontal direction toward the front end of the rim portion via the rear end of the rim portion is formed to communicate.

  The rim lower side wall 26 is formed so as to extend from the upper end of the shelf portion 15 toward the outer peripheral direction, and the rim outer 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 (a direction from the rim portion 16 toward the filth receiving surface 14 in a top view). The rim inner side wall 20 extends downward from the inner peripheral end of the rim upper side wall 24. That is, in the cross section 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.

<Configuration to improve manufacturability>
Further, the lower end of the rim inner side wall 20 is located on the outer peripheral side of the rim portion 16 with respect to the upper end of the shelf portion 15. In other words, the inner diameter of the rim portion 16 is equal to or larger than the inner diameter of the upper end of the bowl portion 8, and the rim portion 16 is formed to bulge outward from the inner side surface of the bowl portion 8. 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 rim wall 20 is formed in a tapered shape such that the inner diameter gradually increases from the lower end toward the upper end. That is, the rim inner side wall 20 that is the inner surface of the rim portion 16 is exposed in a top view.
Furthermore, the lower end of the rim inner side wall 20 is positioned on the outer peripheral side of the rim part 16 with respect to the upper end of the shelf 15, and the upper end of the rim inner side wall 20 is formed on the outer peripheral side of the rim part 16 with respect to the lower end of the rim inner side wall 20. By doing so, it is possible to form a single upper mold adapted to the upper surface of the toilet body 2, the inner surface of the rim portion 16, and the inner surface of the bowl portion 8. Therefore, the toilet body 2 in the present invention includes an upper mold that forms the rim inner wall 20 and the rim upper wall 24, a bottom mold that has a shape that matches the shape of the lower surface of the toilet body 2, and the toilet body 2. The toilet body 2 is molded with only four upper / lower / right / left molds that form the rim outer wall 22 and the rim lower wall 26. can do. The rim spout 30 is formed by cutting out the toilet body 2 after molding.
Furthermore, as described above, the entire rim inner wall 20 of the rim portion 16 is exposed in the top view, and there is no unevenness due to the joining between the rim portion and the bowl portion, so that the cleaning is excellent. A flush toilet can be provided.

<Explanation that the rim water passage 18 is inclined>
A connecting portion between the rim outer wall 22 and the rim lower side wall 26 is formed at a position higher than a connecting portion between the upper end of the shelf 15 and the rim lower side wall 26. That is, the rim lower side wall 26 is inclined downward from the outer peripheral side of the rim portion 16 toward the inner peripheral side. In other words, the upper surface of the rim lower side wall 26 forming the flow path lower surface of the rim water passage 18 is inclined downward in the direction from the rim portion 16 toward the shelf portion 15.

<Outline of rim spout 30>
As shown in FIG. 6, the wash water discharged from the rim water spouting port 30 is scattered from the upper end side of the rim portion 16 to the outside above the rim water spout 30 formed at the downstream end of the rim water passage 18. In order to prevent this, a plate-like collar portion 31 is formed so as to cover the inner side of the rim portion 16.
Moreover, since the collar part 31 should just be formed in a part of rim part, since it can be formed if a plate-shaped member is affixed after shape | molding the flush toilet 1 with a type | mold, it can manufacture without changing the type | mold of a shaping | molding It is.

  Further, in the vicinity of the rim spout 30, the rim outer wall 22 of the rim water passage 18 gradually increases in curvature toward the inner peripheral side of the rim portion 16, and the rim inner wall 20 of the rim water passage is washed. Opened to fulfill the function of a spout that allows water to flow toward the waste receiving surface.

<Overview of the headrace 32>
A water conduit 32 extending forward from the water supply opening 6 and connected to the rim water passage 18 is formed in the upper rear side of the toilet body 2. That is, the wash water that has flowed into the water supply port 6 flows to the rim water passage 18 through the water conduit 32. Further, the water conduit 32 extending forward from the water supply port 6 includes, as a route portion thereof, an upstream water channel portion 34 extending from the water supply port 6 to the right side of the center of the toilet body 2 in the left-right direction, and the upstream water channel. A downstream water channel portion 36 extending leftward from the center in the left-right direction from the portion 34. In other words, the water guide channel 32 has an overall “U” shape (in other examples, a boomerang shape or an L-shape is inclined by the upstream channel unit 34 and the downstream channel unit 36 in a top view. Shape). In the present embodiment, the upstream water channel portion 34 extends from the water supply port 6 diagonally to the left of the toilet body 2 where the rim water discharge port 30 is located, and the downstream water channel portion 36 is the downstream end of the upstream water channel portion 34. It extends to the right diagonally forward from the part. As described above, the water guide path 32 extending forward from the water supply port 6 located substantially in the center of the left and right is bent to the left front side and then extended to the right front side, and is connected to the rim water passage 18.

  The downstream end portion of the downstream water passage portion 36 is connected to the upstream end portion of the rim water passage 18, that is, the right rear end portion of the rim portion 16. Further, the downstream water channel portion 36 is formed so as to substantially overlap a tangent line at the upstream end portion of the rim water channel 18 in a top view. That is, with respect to the right rear portion of the rim water passage 18 that substantially conforms to the oval shape as viewed from above, the downstream water passage portion 36 that extends substantially linearly from the rear side to the front side in a diagonally rightward direction has a flow path direction in the rim. It is provided so as to be continuous in the tangential direction with respect to the annular flow path direction of the water passage 18. Further, the length of the water channel of the downstream water channel portion 36 is formed to be longer than the length of the water channel of the upstream water channel portion 34.

  As described above, the water conduit 32 is not directly extended from the water supply port 6 to the connection portion to the rim water passage 18, and is connected to the rim water passage 18 through the upstream water passage portion 34 as a bypass. The downstream water channel portion 36 connected in the tangential direction is connected to the rim water channel 18. Thereby, the path length of the downstream water channel part 36 connected to the rim water channel 18 in the tangential direction can be increased, and a flow that tends to turn from the downstream water channel part 36 to the rim water channel 18 is easily formed. . Therefore, it is possible to increase the flow of the washing water that is going to turn around the rim water passage 18.

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

  FIG. 7 is a schematic diagram showing the flow of water in a flush toilet according to an embodiment of the present invention.

  As shown in FIG. 7, the wash water discharged from the tank device 4 to the water supply port 6 of the toilet body 2 flows into the upstream water channel portion 34 of the water conduit 32. The wash water flowing through the upstream water channel portion 34 of the water conduit 32 flows toward one side of the toilet body 2 in the left-right direction (in this embodiment, diagonally left front), and then changes direction to the downstream water channel portion 36. Flowing into. The wash water flowing in the direction changing from the upstream water channel 34 to the downstream water channel 36 is the path of the upstream water channel 34 toward the other side of the toilet body 2 in the left-right direction (in the present embodiment, diagonally forward right). Guided over a relatively long path to 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 wash water changes from the upstream water channel portion 34 extending in one of the left and right directions of the toilet body 2 from the water supply port 6 and flows into the downstream water channel portion 36 in a changed direction, and enters the downstream water channel portion 36. Along the left and right directions, the other side is guided over a relatively long length. As a result, the momentum of the washing water flowing from the downstream water channel portion 36 toward the rim water channel 18 is strengthened, and a flow that swirls the rim water channel 18 is easily formed. Therefore, it is possible to increase the momentum of the washing water that tries to turn the rim water passage 18, and the bowl portion 8 can be sufficiently washed.

  The wash water guided to the rim water passage 18 flows while forming a swirl flow that makes a round in a counterclockwise direction when viewed from above along the rim portion 16, and passes from the rim spout 30 to the rear of the waste receiving surface 14. Water is discharged toward the end side, flows along the shelf surface of the shelf portion 15, and is washed down to the filth receiving surface 14 at each part of the turning path of the shelf portion 15 and is washed while turning the filth receiving surface 14.

Further, since the plate-shaped flange 31 is formed above the rim spout 30 so as to cover from the upper edge side of the rim 16 toward the inner side of the rim 16, the washing water flowing through the bowl 8 is Scattering out of the bowl portion 8 is suppressed.
Furthermore, since the upper surface of the rim lower side wall 26 forming the lower surface of the rim water passage 18 is inclined downward in the direction from the rim portion 16 toward the filth receiving surface 14, water is discharged from the rim spout 30. The rim outer wall 22 of the rim water passage 18 is gradually curved toward the inner peripheral side of the rim portion 16 in the vicinity of the rim water discharge port 30. In other words, since the rim outer wall 22 of the rim water passage 18 protrudes toward the inner peripheral side of the rim portion 16, the rim of the rim water passage 18 increases in flow rate due to centrifugal force. The washing water flowing along the outer side wall 22 can be immediately dropped onto the shelf 15 inclined toward the filth receiving surface 14. Accordingly, the cleaning water can smoothly swirl around the dirt receiving surface 14, and a swirling flow with reduced water jump can be formed.

<Modification>
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.

  For example, although the configuration in which the swirl flow formed on the filth receiving surface 14 swirls counterclockwise has been described, the toilet body 2 may be formed so that the swirl flow formed on the filth receiving surface 14 swirls clockwise. good.

  Moreover, the toilet body 2 may be formed of, for example, resin.

  Further, the water conduit 32 includes an upstream water channel portion 34 extending in the left direction from the water supply port 6 in the left-right direction center of the toilet body 2, and a downstream water channel portion 36 extending in the right direction from the upstream water channel portion. Although the structure which it has was demonstrated, it is good also as a structure which the upstream water channel part 34 extends in the right direction, and the downstream water channel part 36 extends in the left direction.

  Moreover, although the rim spout 30 is located behind the middle in the front-rear direction of the bowl portion 8 in the figure, the rim spout is formed so that the flush water channel 32 swirls the cleaning water. The rim water spouting port 30 is limited to the above position because the water is vigorously discharged to the rear of the dirt receiving surface 14 where dirt is most likely to adhere even if it is positioned in front of the middle in the front-rear direction. is not.

  The elements included in each of the embodiments described above can be combined as much as technically possible, and combinations thereof are also included in the scope of the present invention as long as they include the technique of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Tank apparatus 6 Water supply port 8 Bowl part 10 Reservoir part 12 Drain trap pipe 12a Inlet 12b Outlet 14 Soil receiving surface 15 Shelf part 16 Rim part 18 Rim water passage 20 Rim inner wall 22 Rim outer side Wall 24 Rim upper side wall 26 Rim lower side wall 30 Rim spout 31 Ridge part 32 Water conduit 34 Upstream side waterway part 36 Downstream side waterway part W0 Initial water level

Claims (4)

A flush toilet with a rim spout that spouts wash water so as to swivel horizontally,
A bowl portion in which a waste receiving surface is formed on the inside and a drain trap pipe is formed on the lower end, and a rim portion connected to the upper end of the bowl portion,
A rim water passage formed inside the rim portion and having a downstream end communicating with the rim water spouting port; and a water conduit formed behind the rim portion and supplying cleaning water supplied from the outside to the rim water passage. And
The rim water passage is formed through the front end of the rim part, and the flush water discharged from the rim spout is swiveled toward the front end of the rim part through the rear end of the rim part. In
An inner diameter of the rim portion is equal to or greater than an inner diameter of the upper end of the bowl portion, and the rim portion is formed to bulge outward from the inner surface of the bowl portion. The flush toilet according to claim 1, wherein the water conduit is formed to bend toward the other side after going from the center of the flush toilet toward the rim spout side. The flush toilet according to any one of claims 1 to 2, wherein a plate-like collar portion is formed on a part of a downstream side of the rim spout at an upper end of the rim portion. . The flush toilet according to any one of claims 1 to 3, wherein an outer peripheral wall of the rim water passage has a gradually increasing curvature inward in the vicinity of the rim water outlet of the rim water passage. .

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