JP2021046788A - Flush toilet bowl - Google Patents

Abstract

To enable viewing of an upper vertical internal wall surface over the whole circumference thereof.SOLUTION: A flush toilet bowl includes: a toilet bowl 10; a rim 11 which is formed in an upper end edge part of the toilet bowl 10; an upper vertical internal wall surface 13 which is formed in an inner upper end part of the toilet bowl 10 extending from an inner peripheral part of an upper end surface 11S of the rim 11 over the whole circumference of the toilet bowl 10; and a water discharge port 28 which is opened in the upper vertical internal wall surface 13 to discharge washing water and generates a rotational flow 34 in contact with the upper vertical internal wall surface 13. The upper vertical internal wall surface 13 which has the opened water discharge port 28 extends from the upper end surface 11S of the rim 11 at right angle over the whole circumference thereof and has no overhang part. Thus, the whole circumference of the upper vertical internal wall surface 13 can be viewed.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flush toilet.

Patent Document 1 describes the toilet bowl, the rim formed along the upper end edge of the toilet bowl, the upper vertical inner wall surface formed along the upper end edge of the inner surface of the toilet bowl, and the upper vertical inner wall surface. A flush toilet with a plumb bob is disclosed. In this flush toilet, the inside of the toilet bowl is washed with the washing water discharged from the spout, and the filth in the toilet bowl is discharged.

Japanese Patent No. 4941796

In the above flush toilet, an overhang portion is formed in the vicinity of the opening region of the spout on the upper vertical inner wall surface of the toilet bowl. The upper surface of the overhang portion is substantially flush with the horizontal upper surface of the toilet bowl. Therefore, when the region of the upper vertical inner wall surface of the toilet bowl where the overhang portion is formed is dirty, there is a problem that it is difficult to visually check the degree of contamination even if the toilet bowl is looked into from above.

The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object to be solved to provide a flush toilet that allows the upper vertical inner wall surface of the toilet bowl to be visually observed over the entire circumference.

The flush toilet of the present invention
Toilet bowl and
The rim formed on the upper edge of the toilet bowl and
An upper vertical inner wall surface formed on the upper end of the inner surface of the toilet bowl and connected to the inner peripheral edge of the upper end surface of the rim over the entire circumference of the toilet bowl.
It is characterized by having an opening in the upper vertical inner wall surface and a water discharge port for discharging washing water to generate a swirling flow in contact with the upper vertical inner wall surface.
In the present invention, the direction of the upper vertical inner wall surface that is perpendicular to the upper end surface of the rim is not limited to the strict vertical direction, but the direction in which the upper end side is slightly inclined toward the inside of the toilet bowl with respect to the vertical direction (that is,). It also includes a direction that makes a sharp angle with the upper end surface of the rim) and a direction in which the upper end side is slightly inclined to the outside of the toilet bowl with respect to the vertical direction (that is, a direction that forms a right angle with the upper end surface of the rim).

The upper vertical inner wall surface where the spout opens is connected at right angles to the upper end surface of the rim over the entire circumference and does not have an overhang portion. Therefore, even from a viewpoint higher than the rim, the upper vertical inner wall surface It is possible to visually check the entire area over the entire circumference.

Top view of the flush toilet of Example 1 Cross-sectional view taken along line XX of FIG. YY line sectional view of FIG. ZZ line sectional view of FIG.

The flush toilet of the present invention
The spout may be opened at an intermediate position in the vertical direction of the upper vertical inner wall surface.
According to this configuration, the swirling flow that goes around along the upper vertical inner wall surface flows at a position lower than the spout, but the washing water discharged from the spout covers the swirling flow that goes around from above. Since it is covered, it is possible to prevent the washing water from splashing upward.

The flush toilet of the present invention
A shelf surface is formed on the inner surface of the toilet bowl so as to face upward along the lower end edge of the upper vertical inner wall surface.
The lowermost end of the opening region of the spout may be set above the shelf surface.
According to this configuration, the washing water discharged from the spout covers the washing water swirling on the shelf surface from above, so that the washing water on the shelf surface can be prevented from scattering upward.

The flush toilet of the present invention
The plan view shape of the upper vertical inner wall surface has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edges.
The spout may be open at the front end or the rear end of the upper vertical inner wall surface.
According to this configuration, the cleaning water discharged diagonally from the spout comes into tangential contact with the side edge having a large radius of curvature immediately after the discharge, so that the decrease in water force is suppressed and the cleaning power is high. A swirling flow is generated.

The flush toilet of the present invention
A water reservoir connected to the drainage channel is arranged at a position behind the center in the front-rear direction of the toilet bowl.
The spout is arranged behind the water reservoir surface of the water reservoir.
A part of the washing water discharged from the spout may generate a downward induced flow.
According to this configuration, a part of the washing water discharged from the spout becomes a downward guided flow toward the water reservoir, so that filth can be effectively guided to the drainage channel.

<Example 1>
Hereinafter, Example 1 embodying the present invention will be described with reference to FIGS. 1 to 4. In the following description, the lower side in FIG. 1 and the right side in FIGS. 2 and 3 are defined as the front side in the front-rear direction. Regarding the left-right direction, the directions appearing in FIGS. 1 and 4 are defined as the left side and the right side as they are. The flush toilet of the first embodiment includes a toilet bowl 10, a water reservoir 17, a drainage channel 19, and a water supply unit 24.

<Toilet bowl 10>
The stool bowl 10 has a substantially mortar shape that is open upward. A rim 11 is formed on the toilet bowl 10 along the upper end edge thereof. The upper end surface 11S of the rim 11 is substantially horizontal over the entire circumference and is continuous at a constant height over the entire circumference. The inner surface of the toilet bowl 10 is a bowl surface 12 for receiving filth (not shown). The upper end region of the pot surface 12 is an upper vertical inner wall surface 13 that is continuous over the entire circumference. As shown in FIGS. 2 to 4, the upper vertical inner wall surface 13 is connected to the upper end surface 11S of the rim 11 so as to form a right angle via an arcuate convex surface 14 having a small radius of curvature. The upper end surface 11S and the upper vertical inner wall surface 13 are smoothly (tangentially) connected to the arcuate convex surface 14 surface.

As shown in FIGS. 2 to 4, in the cut surface along the vertical plane passing through the center of the toilet bowl 10 in a plan view, the upper end side region of the upper vertical inner wall surface 13 is substantially linear, and the arcuate convex surface 14 is formed. It is composed only of convex surfaces. The form in which the upper vertical inner wall surface 13 and the upper end surface 11S are connected at right angles via the arcuate convex surface 14 is continuous over the entire circumference of the toilet bowl 10 (rim 11). Therefore, the upper vertical inner wall surface 13 is not formed with an overhang portion, a convex portion, or a concave portion protruding into the inside of the toilet bowl 10 over the entire region. As a result, when the upper vertical inner wall surface 13 is viewed from a position higher than the upper end surface 11S of the rim 11 diagonally downward, the entire area of the upper vertical inner wall surface 13 can be visually observed.

The upper vertical inner wall surface 13 is perpendicular to the substantially horizontal upper end surface 11S of the rim 11. The “right angle” in this embodiment is not limited to an exact 90 ° angle, but is 90 °. Includes angles slightly smaller and angles slightly larger than 90 °. Therefore, the direction of the upper vertical inner wall surface 13 is not limited to the strict vertical direction (vertical direction), but is inclined so that the upper end side slightly tilts inward of the toilet bowl 10 with respect to the vertical direction (that is, the direction of the rim 11). A direction in which the upper end side is slightly inclined to the outside of the toilet bowl 10 with respect to the vertical direction (that is, a direction in which the upper end side is slightly inclined to the outside of the toilet bowl 10) is also included.

The region of the pot surface 12 below the upper vertical inner wall surface 13 is a shelf surface 15 that is continuous over the entire circumference. The shelf surface 15 is smoothly continuous with the lower end of the upper vertical inner wall surface 13 via the arcuate concave surface 16. The shelf surface 15 faces upward over the entire circumference, and is inclined so as to become lower as the distance from the upper vertical inner wall surface 13 increases. The inclination angle of the shelf surface 15 with respect to the horizontal plane is not constant in the circumferential direction and varies depending on the part, but is set to an angle smaller than 45 ° in the entire circumference.

<Reservoir 17 and drainage channel 19>
The lower end of the toilet bowl 10 is a water reservoir 17. The water reservoir 17 is arranged at the center of the toilet bowl 10 in the left-right direction (width direction). Further, the water reservoir 17 is arranged at a position biased to the rear of the center in the front-rear direction of the toilet bowl 10. The inner surface of the upper end of the water reservoir 17 is composed of a substantially vertical vertical wall 18 over the entire circumference. The upper end of the vertical wall 18 is smoothly continuous with the inner peripheral edge of the shelf surface 15.

As shown in FIG. 2, the drainage channel 19 includes an ascending path 20 connected to the water reservoir 17 and a descending path 21 connected to the downstream end (upper end) of the ascending path 20. The descending path 21 is connected to a drainage pipe (not shown) provided on the floor of the toilet. The water reservoir 17 is located at the entrance of the drainage channel. The drainage channel 19 is symmetrical and is arranged at the center of the toilet bowl 10 in the left-right direction (width direction).

Before cleaning, the cleaning water is stored in the water storage portion 17 and the ascending path 20 as pool water. The liquid level when the accumulated water is stationary in the water reservoir 17 is defined as the water reservoir surface 23. The filth received on the pot surface 12 and the filth settled in the water reservoir 17 are discharged through the drainage channel 19 together with the washing water swirling or flowing down along the pot surface 12.

<Water supply unit 24>
The water supply unit 24 is for supplying wash water to the toilet bowl 10, and is formed adjacent to the rear of the upper surface portion of the toilet bowl 10. The central portion in the left-right direction at the front end of the water supply portion 24 is connected to the rear end portion of the rim 11, and the upper surface of the water supply portion 24 and the upper end surface 11S of the rim 11 are flush with each other. As shown in FIGS. 2 and 3, the water supply unit 24 is in front of the rear water supply space 25 and the rear water supply space 25 formed so as to communicate with the water supply port (not shown) of the washing tank or the like with the upper surface open. It is located and is configured to include a front water supply space 26 that communicates with the rear water supply space 25 through a communication hole 27.

<Water spout 28>
A spout 28 for discharging the washing water supplied into the water supply unit 24 into the toilet bowl 10 is formed at the upper end portion (rim 11) of the toilet bowl 10. The water spout 28 has a form that penetrates a partition wall portion 29 that separates the upper vertical inner wall surface 13 and the front water supply space 26. That is, the spout 28 is located at the rear end of the upper vertical inner wall surface 13 and opens toward the front.

As shown in FIG. 4, the opening shape (front view shape) of the spout 28 has a horizontally long square shape as a whole, the four corners are formed in an arc shape, and the water discharge port 28 is vertically asymmetrical and left-right asymmetrical. Of the four edges forming the opening edge of the spout 28, the upper edge 30 extends in the horizontal direction. The right edge 31 extends in the vertical direction. The left edge 32 has an arc shape. The lower edge 33 is not horizontal and is slightly inclined so as to gradually increase toward the left. In other words, the lower edge 33 of the spout 28 is inclined so as to descend from the left side of the toilet bowl 10 toward the center. Therefore, the height dimension of the spout 28 gradually decreases from the right side to the left side.

As shown in FIG. 1, in the front-rear direction, the water spout 28 is open to a region behind the rear end of the water storage surface 23 of the water storage portion 17 over the entire spout 28. In addition, the entire spout 28 is open to the left side of the center of the toilet bowl 10 in the left-right direction. Most of the water discharge port 28 except the left end is opened so as to overlap the water storage surface 23 in the left-right direction. Further, as shown in FIG. 4, the uppermost end (upper edge side 30) of the opening region of the spout 28 is set at a position lower than the upper end (lower end of the arcuate convex surface 14) of the upper vertical inner wall surface 13. The lowermost end of the opening region of the spout 28 (the right end of the lower edge 33) is set at a position above the shelf surface 15.

Washing water is discharged into the toilet bowl 10 from the water spout 28. The discharge direction of the washing water from the water discharge port 28 is a direction along the upper vertical inner wall surface 13, and is a counterclockwise direction in a plan view. The discharge flow rate of the washing water (the amount of water discharged per unit time) is almost maximum at the start of discharge, then gradually decreases, and becomes minimum just before the end of discharge. Therefore, from the start of discharge to just before the end of discharge, the discharged wash water becomes a swirling flow 34 in contact with the lower end portion of the upper vertical inner wall surface 13 and the shelf surface 15. Since the swirling flow 34 flows along the lower end of the upper vertical inner wall surface 13, it does not scatter above the toilet bowl 10 (rim 11). The swirling path of the swirling flow 34 gradually moves downward due to gravity and flows into the water reservoir portion 17.

Then, just before the end of discharge, the discharged wash water becomes an induced flow 35 that is substantially vertically downward toward the water reservoir 17. The downward induced flow 35 just before the end of discharge flows down so as to cover the swirling flow 34 at the rear end of the shelf surface 15 from above. Therefore, at the rear end of the shelf surface 15, the swirling flow 34 is guided downward by the guided flow 35 and flows into the water reservoir portion 17. Since the water reservoir 17 communicates with the entrance of the drainage channel 19, the washing water and filth in the toilet bowl 10 are surely discharged.

The flush toilet of this embodiment is formed on the toilet bowl 10 and the upper end of the inner surface of the toilet bowl 10, and covers the entire circumference of the toilet bowl 10 with respect to the inner peripheral edge of the substantially horizontal upper end surface 11S of the toilet bowl 10. It has an upper vertical inner wall surface 13 which is connected at a right angle. The upper vertical inner wall surface 13 is opened with a water discharge port 28 that discharges washing water to generate a swirling flow 34 in contact with the upper vertical inner wall surface 13. Since the upper vertical inner wall surface 13 through which the spout 28 opens is connected at right angles to the horizontal upper end surface 11S of the toilet bowl 10 and does not have an overhang portion over the entire circumference, it is more than the upper end surface 11S of the rim 11. Even from a high position, the entire region of the upper vertical inner wall surface 13 can be visually observed over the entire circumference.

Further, the water spout 28 is opened at an intermediate position in the vertical direction of the upper vertical inner wall surface 13. According to this configuration, the swirling flow 34 that goes around along the upper vertical inner wall surface 13 flows at a position lower than the water discharge port 28, but the cleaning discharged from the water spout 28 with respect to the swirling flow 34 that goes around. Since the water covers from above, it is possible to prevent the washing water from splashing upward.

Further, on the inner surface of the toilet bowl 10, an upward shelf surface 15 along the lower end edge of the upper vertical inner wall surface 13 is continuously formed over the entire circumference, and the lowermost end of the opening region of the spout 28 is formed. , It is set above the shelf surface 15. According to this configuration, the washing water discharged from the spout 28 covers the washing water swirling on the shelf surface 15 from above, so that the washing water on the shelf surface 15 can be prevented from scattering upward. ..

Further, the plan-view shape of the upper vertical inner wall surface 13 has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edge portions. That is, it has a substantially elliptical shape with the long axis oriented in the front-rear direction. The water spout 28 is opened at the rear end of the upper vertical inner wall surface 13 (that is, a region having a small radius of curvature). According to this configuration, the washing water discharged diagonally forward from the water discharge port 28 makes tangential contact with the side edge portion having a large radius of curvature immediately after the discharge, so that the decrease in the water force of the washing water can be suppressed. .. Therefore, a swirling flow 34 having high detergency is generated.

Further, a water reservoir 17 connected to the drainage channel 19 is arranged at a position rearward of the center of the toilet bowl 10 in the front-rear direction, and the water spout 28 is behind the water reservoir surface 23 of the water reservoir 17. A part of the washing water discharged from the water spout 28 is arranged to generate a downward guided flow 35. According to this configuration, a part of the washing water discharged from the water spout 28 becomes a downward guided flow 35 toward the water reservoir 17, so that filth can be effectively guided to the drainage channel 19.

<Other Examples>
The present invention is not limited to the examples described by the above description and drawings, and for example, the following examples are also included in the technical scope of the present invention.
(1) In the above embodiment, the spout is arranged at the rear end of the toilet bowl (rim), but the spout may be arranged at a position in front of the rear end of the toilet bowl.
(2) In the above embodiment, the number of spouts is only one, but a plurality of spouts may be arranged at different positions. In this case, the spout from the second spout does not have to be a spout that generates a swirling flow. For example, a spout that spouts water only downward may be used.
(3) In the above embodiment, the lowermost end of the opening area of the spout is set above the shelf surface, but the lowermost end of the opening area of the spout may be the same height as the shelf surface.
(4) In the above embodiment, the entire spout is opened in the area to the left of the center of the toilet bowl in the left-right direction, but the entire spout is opened in the area to the right of the center of the toilet bowl in the left-right direction. Alternatively, the spout may be opened so as to straddle the center line in the left-right direction of the toilet bowl.
(5) In the above embodiment, the entire spout is opened in the region behind the rear end of the water reservoir surface of the water reservoir, but the entire water spout is in front of the front end of the water reservoir surface of the water reservoir. It may be opened in the area, or a part of the opening area of the spout may be in a positional relationship so as to overlap the water reservoir surface in the front-rear direction.
(6) In the above embodiment, the opening shape when the spout is viewed from the front is asymmetrical, but the opening shape when the spout is viewed from the front may be symmetrical.

10 ... Toilet bowl 11 ... Rim 11S ... Upper end surface of rim 13 ... Upper vertical inner wall surface 15 ... Shelf surface 17 ... Reservoir 19 ... Drainage channel 23 ... Reservoir surface 28 ... Spout 34 ... Swirling flow 35 ... Guided flow

The flush toilet of the first invention includes a toilet bowl, a rim formed on the upper end edge of the toilet bowl, a spout formed on the rim and discharging wash water in one direction in a plan view. It is provided with an upper vertical inner wall surface formed at the upper end of the inner surface of the toilet bowl and provided at least above the upper edge of the spout, and the spout has at least a part of the opening region of the spout in the front-rear direction. It is one of a form in which the water outlet overlaps the water collecting surface of the toilet bowl in the direction and a form in which the entire spout opens in a region in front of the front end of the water collecting surface, and is at least the front end of the toilet bowl. In the portion, the upper end side region of the upper vertical inner wall surface is substantially linear in the cut surface along the vertical surface, and the upper vertical inner wall surface and the upper end surface of the rim are connected via an arcuate convex surface.
The water-washing toilet bowl of the second invention has a toilet bowl, a rim formed on the upper end edge of the toilet bowl, and a spout formed on the rim and discharging washing water in a counterclockwise direction in a plan view. And an upper vertical inner wall surface formed at the upper end of the inner surface of the toilet bowl and provided at least above the upper edge of the spout, and the entire spout is from the center of the toilet bowl in the left-right direction. Also opens to the right side of the spout, the spout has a form in which at least a part of the spout opening region overlaps the water reservoir surface of the toilet bowl in the front-rear direction, and the entire spout port is the front end of the water reservoir surface. It is one of the forms that opens in the area in front of the toilet bowl, and an upward shelf surface along the lower end edge of the upper vertical inner wall surface is continuous over the entire circumference on the inner surface of the toilet bowl. The lowermost end of the opening region of the spout is at the same height as the shelf surface, and the upper end side region of the upper vertical inner wall surface is substantially linear in the cut surface along the vertical plane. The form in which the upper vertical inner wall surface and the upper end surface of the rim are connected via an arcuate convex surface are continuous over the entire circumference of the toilet bowl.
In the first and second inventions, the direction of the upper vertical inner wall surface extending at right angles to the upper end surface of the rim is not limited to the strict vertical direction, and the upper end side is slightly inclined to the inside of the toilet bowl with respect to the vertical direction. It also includes a direction (that is, a direction that makes a sharp angle with the upper end surface of the rim) and a direction in which the upper end side is slightly inclined to the outside of the toilet bowl with respect to the vertical direction (that is, a direction that makes an blunt angle with the upper end surface of the rim).

Claims (5)

Toilet bowl and
The rim formed on the upper edge of the toilet bowl and
An upper vertical inner wall surface formed on the upper end of the inner surface of the toilet bowl and connected to the inner peripheral edge of the upper end surface of the rim over the entire circumference of the toilet bowl.
A flush toilet having an opening in the upper vertical inner wall surface and a water discharge port for discharging washing water to generate a swirling flow in contact with the upper vertical inner wall surface. The flush toilet according to claim 1, wherein the water spout is opened at an intermediate position in the vertical direction of the upper vertical inner wall surface. A shelf surface is formed on the inner surface of the toilet bowl so as to face upward along the lower end edge of the upper vertical inner wall surface.
The flush toilet according to claim 1 or 2, wherein the lowermost end of the opening region of the spout is set above the shelf surface. The plan view shape of the upper vertical inner wall surface has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edges.
The flush toilet according to any one of claims 1 to 3, wherein the water spout is opened at the front end or the rear end of the upper vertical inner wall surface. A water reservoir connected to the drainage channel is arranged at a position behind the center in the front-rear direction of the toilet bowl.
The spout is arranged behind the water reservoir surface of the water reservoir.
The flush toilet according to any one of claims 1 to 4, wherein a part of the washing water discharged from the spout generates a downward induced flow.

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