JP2022100749A - urinal - Google Patents

Abstract

To provide a urinal that can further reliably wash a front part of a bowl surface, which is easily soiled, and can improve washability and cleanliness.SOLUTION: A urinal according to an embodiment comprises: a bowl surface that receives urine; a water discharge device that discharges washing water to the bowl surface at an upper part of the bowl surface; and a shelf part that extends downward from both right and left sides of the bowl surface to a front part of the bowl surface and guides a part of the washing water discharged from the water discharge device to the front part of the bowl surface. The water discharge device is provided with a water discharge opening part that opens so that the washing water can be discharged toward the bowl surface, and a water supply flow channel that supplies the washing water from a water supply source to the inside of the water discharge opening part. The water discharge opening part has a front wall part forming a front wall and a rear wall part forming a rear wall on a bowl surface side and in contact with the bowl surface, and a mainstream part with the strongest water force of the washing water discharged from the water discharge opening part is set toward the upper end of the shelf part.SELECTED DRAWING: Figure 5

Description

An embodiment of the disclosure relates to a urinal.

Conventionally, for example, the bowl surface has a side surface portion that rises forward so as to form an inward side wall from the left and right ends of the bowl surface, and wash water is applied to the bowl surface at the upper center of the bowl surface. Urinals provided with a spreading spreader are known.

In order to more reliably clean the front part of the bowl surface, such a urinal is provided with a shelf portion from the left and right side surface portions of the bowl surface to the front portion of the bowl surface, and spreads laterally from the spreader. The washed water discharged in this way rides on the shelf, and the washing water is guided to the shelf so that the washing water reaches the front part of the bowl surface while suppressing the flow from the shelf (for example). , Patent Document 1).

Japanese Unexamined Patent Publication No. 2017-31641

However, in the conventional urinal as described above, the washing water discharged from the spreader to the left and right sides and on the shelf is discharged from the spreader and spreads to the outside of the shelf inside the bowl surface of the washing water. The flow back to may cause some of it to be knocked off the shelf, resulting in loss of wash water reaching the front of the bowl surface. If the washing water that reaches the front part of the bowl surface is lost, the cleaning of the front part of the bowl surface, which is easily contaminated, may be insufficient, and the detergency and cleanliness may be deteriorated. In addition, it is difficult for the washing water discharged from the spreader to have a uniform water force strength, and it is inevitable to set an aim in consideration of the range of water force strength.

By increasing the amount of washing water from the spreader, even if a loss occurs in the washing water, the loss can be compensated for, but this is not preferable due to the recent trend of water saving.

One aspect of the embodiment is to provide a urinal that can more reliably clean the front of a dirty bowl surface and improve cleanability and cleanliness.

The toilet bowl according to one embodiment includes a bowl surface that receives urine, a water discharge device that discharges washing water to the bowl surface at the upper part of the bowl surface, and the bowl surface from both left and right sides of the bowl surface. A toilet bowl that extends down to the front part of the toilet bowl and has a shelf portion that guides a part of the washing water discharged from the water discharge device to the front part of the bowl surface. It is provided with a water discharge opening that opens so that wash water can be discharged toward the bowl surface, and a water supply flow path that supplies wash water from the water supply source to the inside of the water discharge opening. The water discharge opening has a front wall. It has a front wall portion to be formed and a rear wall portion to form a rear wall to be the bowl surface side and is in contact with the bowl surface, and has the most water force among the washing water discharged from the water discharge opening. It is characterized in that a strong mainstream portion is set toward the upper end portion of the shelf portion.

According to such a configuration, the mainstream portion having the strongest water force among the washing water discharged from the spout opening rides on the shelf portion and reaches the front portion of the bowl surface while being guided by the shelf portion. At that time, of the washing water from the spout opening, the washing water spreading to the outside of the shelf joins the washing water (mainstream) flowing through the shelf, but spreads to the outside of the shelf (does not get on the shelf). T) The amount of washing water is smaller than that of the mainstream part on the shelf, and even if it joins the shelf later, there is not enough water to knock down the washing water (mainstream part) flowing through the shelf. Much of the wash water on the bowl can reach the front of the bowl surface. As a result, the front portion of the bowl surface, which is easily soiled, can be more reliably washed, and the cleanability and cleanliness can be improved.

Further, in the above-mentioned urinal, the shelf portion is characterized by having a forward inclined portion in which the vicinity of the upper end portion is inclined inward, or a flat portion in which the vicinity of the upper end portion is flat. do.

According to such a configuration, not only the mainstream portion of the washing water discharged from the spout opening can easily get on the shelf, but also the water force drops when the mainstream collides with the upper end which is the entrance of the shelf. Can be suppressed. Further, it is possible to suppress a flow in which the mainstream portion collides with the upper end portion of the shelf portion and widely spreads to the outside of the shelf portion, and the subsequent washing water (mainstream portion) flowing through the shelf portion is knocked down. As a result, the front portion of the bowl surface, which is easily soiled, can be more reliably washed, and the cleanability and cleanliness can be improved.

Further, in the above-mentioned urinal, the water discharge opening is set so that the mainstream portion has a strong water force inside the outside of the upper end portion.

According to such a configuration, the main flow portion of the washing water discharged from the spout opening collides with the inside of the upper end portion, and the flow rides on the shelf portion toward the front portion of the bowl surface and from the upper end portion to the inside. A downward flow is formed. As a result, it is unlikely that a flow that once rides on the shelf but then spreads widely to the outside and then knocks down the washing water (mainstream) flowing through the shelf is unlikely to occur. For this reason, most of the washing water on the shelf can reach the front part of the bowl surface, and the front part of the bowl surface, which is easily contaminated, can be washed more reliably, improving the cleaning property and cleanliness. Can be made to.

Further, when the upper end portion of the shelf portion has a forward inclined portion or a flat portion, a small amount of washing water flowing outside the mainstream portion becomes the washing water (mainstream portion) flowing through the shelf portion by the forward inclined portion or the flat portion. , The washing water flowing through the shelves can be merged without being knocked down, and a large amount of washing water can reach the front part of the bowl surface. As a result, the front portion of the bowl surface, which is easily soiled, can be more reliably washed, and the cleanability and cleanliness can be improved.

Further, in the above-mentioned urinal, the water discharge device has a slit-shaped water passage formed between the front wall portion and the rear wall portion, and the width of the water passage in the front-rear direction is partially narrowed. A narrow portion to be formed, a protrusion protruding forward from the rear wall portion to form the narrow portion, and a protrusion protruding downward from the lower surface of the protruding portion and away from the bowl surface. It is characterized by having.

According to such a configuration, after the washing water is discharged from the spout opening, the washing water remaining in the water passage collects on the protrusion, and the collected washing water falls from the protrusion and remains in the water passage. The washing water that is being used can be completely removed. This makes it possible to suppress the generation of drops from the water discharge opening.

Further, in the above-mentioned urinal, the bowl surface has left and right side surface portions that rise forward so as to form inward side walls from the left and right end portions, and the left and right side surface portions are the bowl surface. In front view, it is characterized in that it has a shape that focuses inward at an inclination angle of a predetermined angle or more as it goes downward.

According to such a configuration, the washing water (mainstream part) flowing through the shelf part by the flow returning to the inside of the washing water spreading outside the shelf part so that there is almost no radius on the left and right side surfaces of the bowl surface. On the bowl surface, which is easily knocked off, the front part of the bowl surface, which is easily soiled, can be more reliably washed, and the cleanability and cleanliness can be improved.

According to one aspect of the embodiment, the front portion of the bowl surface, which is easily contaminated, can be more reliably washed, and the cleanability and cleanliness can be improved.

FIG. 1 is a front view showing a urinal according to an embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a perspective view showing a water discharge device. FIG. 4 is a schematic front view showing the water discharge opening. FIG. 5 is an explanatory diagram of the flow of wash water on the bowl surface. FIG. 6 is an explanatory diagram of the flow of the washing water of this example in the vicinity of the upper end portion of the shelf portion. FIG. 7 is an explanatory diagram of the flow of the washing water of the comparative example in the vicinity of the upper end portion of the shelf portion. FIG. 8 is an explanatory diagram of (a) an example in the vicinity of the upper end portion of the shelf portion, and (b) an explanatory diagram of another example in the vicinity of the upper end portion of the shelf portion. FIG. 9 is a side view showing the shelf portion. FIG. 10 is an explanatory diagram of the drainage function by the protrusion.

Hereinafter, embodiments of the urinals disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments shown below.

First, the overall configuration of the urinal 1 according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing the urinal 1 according to the embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG.

For convenience of explanation, each figure may show a three-dimensional Cartesian coordinate system including a Z-axis whose positive direction is vertically upward (upward). In this case, the positive direction of the X axis is to the left, the negative direction of the X axis is to the right, the positive direction of the Y axis is forward, the negative direction of the Y axis is backward, the positive direction of the Z axis is upward, and the negative direction of the Z axis. Is defined as downward, the X-axis direction is referred to as the left-right direction, the Y-axis direction is referred to as the front-back direction, and the Z-axis direction is referred to as the up-down direction.

Further, in the following, in the bowl surface 21 described later of the urinal 1, the side toward the center line in the left-right direction is referred to as the inside, and the side away from the center line is referred to as the outside.

As shown in FIGS. 1 and 2, the urinal 1 includes a urinal body 2 and an automatic cleaning unit 3. The urinal 1 is a wall-mounted type installed on the wall surface of the toilet room, but may be a floor-standing type installed on the floor surface of the toilet room.

The urinal body 2 is made of pottery. The urinal body 2 is not limited to the pottery, but may be made of resin, metal such as stainless steel, or a combination of pottery and resin. .. The urinal body 2 has a bowl surface 21. The bowl surface 21 receives the urine of the user standing in front of the bowl surface 21. The bowl surface 21 has a front surface portion 22 and left and right side surface portions 23.

The front portion 22 is formed in an arc shape (arch shape) that is open from the upper portion to the lower portion so as to face the user. The upper portion 22a of the front surface portion 22 is a substantially flat surface or a slightly concave curved surface continuous in the left-right direction, and the central portion 22b thereof is a concave curved surface continuous in the left-right direction and in the front-rear direction. It is a concave curved surface that is continuous with.

Further, as shown in FIG. 2, the bottom portion 22c of the front portion 22 is formed in a pot shape, collects the user's urine and the washing water discharged from the water discharge device 32 described later, and discharges the bottom portion 22c. Guide urine and wash water to outlet 24. A perforated plate (not shown) is attached to the discharge port 24. The urine and washing water that have flowed into the discharge port 24 flow through the trap pipe line 25 connected to the discharge port 24 and are discharged to the drainage pipe line (not shown) connected to the trap line 25.

The left and right side surface portions 23 are formed so as to rise forward from the left and right end portions of the front surface portion 22. That is, the left and right side surface portions 23 form inward side walls from the left and right end portions of the front surface portion 22. In the front view of the bowl surface 21, the left and right side surface portions (left surface portions) have a predetermined angle (for example, almost no radius) in the portion from one broken line to the other broken line in FIG. When the horizon is 0 °, the shape is such that it focuses inward at an inclination angle of 60 °) or more. Therefore, when the bowl surface 21 is viewed from the front, it is a vertically long substantially isosceles triangle.

Further, the bowl surface 21 further has a shelf portion 26. The shelf portion 26 is provided on the bowl surface 21. The shelf portion 26 is formed in a stepped shape so as to project inward from the bowl surface 21, and the bowl surface 21 is formed from the left and right side portions of the bowl surface 21 (the left and right side portions of the front portion 22 or the left and right side surface portions 23). It extends down to the front 27. A part of the washing water discharged from the water discharge device 32 rides on the shelf part 26, so that a part of the washing water is guided to the front part 27.

The automatic cleaning unit 3 includes a control device 31 and a water discharge device 32. The control device 31 controls each unit based on a detection signal from a human body detection sensor or the like, which will be described later, a predetermined control program, or the like. The control device 31 may be installed inside the storage unit when the urinal body 2 has a storage unit, and when the urinal body 2 does not have a storage unit, for example, in the toilet room. It may be installed in the wall.

The water discharge device 32 is arranged on the upper portion 22a of the front portion 22 on the bowl surface 21. The water discharge device 32 discharges the washing water to the bowl surface 21 at the upper portion 22a of the front portion 22. The water discharge device 32 will be described later with reference to FIGS. 3 and 4.

In addition to the control device 31 and the water discharge device 32, the automatic cleaning unit 3 further includes a water supply pipe, a flow rate adjusting valve, an on-off valve, a water supply flow path, and a human body detection sensor (not shown). The water supply pipe is a pipe that supplies washing water from a water supply source such as water supply. The flow rate adjusting valve is a valve provided on the water supply pipe to open and close the water supply pipe. The on-off valve is a valve provided in the water supply pipe to supply and stop the washing water. The water supply flow path is a flow path for supplying wash water from the on-off valve to the water discharge device 32. The water discharge device 32 is attached to the tip of the water supply flow path.

The human body detection sensor is a sensor that detects a user standing in front of the urinal 1 (bowl surface 21). In the automatic cleaning unit 3, for example, when the user stands in front of the urinal 1, the human body detection sensor detects the user, transmits the detection signal to the control device 31, and the control device 31 receives the detection signal. , The control device 31 recognizes the existence of the user.

Further, in the automatic cleaning unit 3, when the user finishes urinating on the bowl surface 21 of the urinal 1, the user who has finished urinating leaves from the front of the urinal 1, and the human body detection sensor becomes a non-detection state, the control device 31 determines that the user has left.

When the control device determines that the user has left, the control device starts a cleaning operation. The cleaning operation of the urinal 1 includes a so-called equipment protection cleaning operation in which the control device 31 starts a cleaning operation of flowing cleaning water to the urinal 1 when it is determined that it is necessary for equipment protection such as piping. May be included.

Next, the water discharge device 32 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the water discharge device 32. Note that FIG. 3 shows a state in which the front plate is removed. FIG. 4 is a schematic front view showing the water discharge opening 33. As shown in FIG. 3, the water discharge device 32 is a circular tube-shaped spreader (hereinafter, the water discharge device 32 is referred to as a spreader), and has a water discharge opening 33 and a water supply flow path (hereinafter, referred to as a spreader water supply flow path) 34. To prepare for.

The water discharge opening 33 is an opening that allows the washing water to be discharged toward the bowl surface 21. The water supply flow path 34 is a flow path for supplying the washing water flowing through the water supply pipe, the flow rate adjusting valve, the on-off valve, and the water supply flow path from the water supply source such as water supply to the inside of the water discharge opening 33. The spreader water supply flow path 34 has a circular tube shape and extends from the back side (wall side) of the bowl surface 21 to the front side, and supplies the washing water supplied to the inside of the spreader 32 to the water discharge opening 33.

The spreader water supply flow path 34 is arranged on the downstream side of the on-off valve (not shown) described above, and immediately after the on-off valve changes from the valve open state to the valve closed state, the inside of the spreader water supply flow path Is filled with wash water, and the wash water that exists on the downstream side of the on-off valve and has not been discharged gradually flows out from the discharge opening as residual water. Since is in the shape of a circular tube, when the residual water gradually flows out from the spreader water supply flow path 34, the residual water flows out while gathering in the center.

The water discharge opening 33 has an upper wall 331, a front wall portion 332, a rear wall portion 333, a water passage 334, a protruding portion 335, a narrow portion 336, and a protrusion 337. The upper wall 331 forms the left and right upper end surfaces of the water discharge opening 33. The front wall portion 332 is provided inside the water discharge opening 33, and forms a wall on the front side (front side) of the water discharge opening 33. At the front wall portion 332, the washing water supplied from the spreader water supply flow path 34 collides and spreads to the left and right.

The rear wall portion 333 is provided inside the water discharge opening 33, and forms a rear side (rear side) wall on the bowl surface 21 side. The rear wall portion 333 is in contact with the bowl surface 21. The water passage 334 is formed in a slit shape between the front wall portion 332 and the rear wall portion 333. The water passage 334 opens in a fan shape in the left-right direction, and forms a fan-shaped opening passage between the left and right upper walls, the front wall portion, and the rear wall portion. Such a water discharge opening 33 discharges the washing water so as to spread in the left-right direction. Further, in this case, it is difficult for the washing water discharged from the spreader to have a uniform water force strength, and it is necessary to aim at the water discharge direction in consideration of the range of water force strength.

The rear wall portion 333 is connected to the outlet of the spreader water supply flow path 34 in the upper region in the center thereof. The protrusion 335 is provided on the rear wall portion 333. The protruding portion 335 protrudes in a trapezoidal shape from the rear wall portion 333 toward the front wall portion 332, that is, protrudes forward. The narrow portion is formed in the water passage 334 by the protrusion 335. The narrow portion 336 partially narrows the width of the water passage 334 in the front-rear direction.

The protrusion 337 has a rectangular block shape that is long in the front-rear direction, is provided on the lower surface of the protrusion 335, and protrudes downward from the lower surface of the protrusion 335. Further, the protrusion 337 is separated from the bowl surface 21. That is, the protrusions 337 are provided at predetermined intervals with respect to the bowl surface 21. The protrusion 337 is formed, for example, to have a width of about 0.5 mm on the left and right and a height (thickness) of about 0.5 mm on the top and bottom.

Such a protrusion 337 also serves as a mark that can be identified by a tentacle by an assembling worker, for example, when assembling the spreader 32. Further, such a protrusion 337 is a portion that is difficult to see visually because it is located on the lower surface of the protrusion 335, but consideration is given to making it visible by touch.

In such a water discharge opening 33, the cleaning water W discharged from the water discharge opening 33 is not limited to the width range in which water is discharged in the vicinity of the fan-shaped end (side) in the front view of the water discharge opening 33. , The mainstream portion W1 with the strongest water force is discharged. Further, in such a water discharge opening 33, the washing water W2 having a weaker water force than the mainstream portion is discharged inside the mainstream portion W1. Therefore, in the water discharge opening 33, the water discharge direction of the mainstream portion W1 can be set by adjusting the width of the upper wall 331 in the left-right direction (that is, the left-right opening angle α of the upper wall 331).

Next, with reference to FIG. 5, the discharge direction of the wash water W discharged from the spreader 32 (spout opening 33) and the mode of the flow of the wash water W on the bowl surface 21 will be described. FIG. 5 is an explanatory diagram of the flow of the washing water W on the bowl surface 21. Note that FIG. 5 shows a perspective view of the urinal 1. As shown in FIG. 5, the mainstream portion W1 of the cleaning water W discharged from the spreader 32, that is, the mainstream portion W1 of the cleaning water W discharged from the discharge water opening 33 (see FIG. 4) is the upper end of the shelf portion 26. It is set to go to the part 26a.

The mainstream portion W1 discharged from the water discharge opening 33 heads toward the upper end portion 26a of the shelf portion 26, rides on the upper surface 26b of the shelf portion 26 from the upper end portion 26a, flows through the upper surface 26b of the shelf portion 26, and flows on the upper surface 26b of the shelf portion 26 to the bowl surface 21. Reach the front 27. In this case, since the washing water W discharged from the water discharge opening 33 is suppressed from spreading outward from the shelf portion 26, the washing water W2 having a weaker water force than the mainstream portion W1 is discharged inside the mainstream portion W1. Will be done.

Here, the flow of the washing water W in the shelf portion 26 will be further described with reference to FIGS. 6 and 7. FIG. 6 is an explanatory diagram of the flow of the washing water W of this example in the vicinity of the upper end portion 26a of the shelf portion 26. FIG. 7 is an explanatory diagram of the flow of the washing water W of the comparative example in the vicinity of the upper end portion 26a of the shelf portion 26. Note that FIGS. 6 and 7 schematically show the mode of the washing water W flowing while being guided by the upper surface 26b of the shelf portion 26.

As shown in FIG. 6, in this example (the present embodiment), the mainstream portion W1 of the washing water W discharged from the water discharge opening 33 (see FIG. 4) toward the upper end portion 26a of the shelf portion 26 is the shelf portion. It rides on the upper surface 26b of the shelf portion 26 from the upper end portion 26a of the 26 and flows to the front portion 27 (see FIG. 5) of the bowl surface 21 while being guided by the upper surface 26b.

In this case, the water discharge direction of the wash water W is set in the water discharge opening 33 so that the mainstream portion W1 has a stronger water force inside the upper end portion 26a of the shelf portion 26 than the outside. In the water discharge opening 33, the discharge direction of the wash water W is set so that the mainstream portion W1 faces inward from the center line L of the upper end portion 26a of the shelf portion 26.

As shown in FIG. 7, in the comparative example, the washing water W discharged from the water discharge opening 33 is set in the water discharge direction so that the mainstream portion W1 faces the outside of the shelf portion 26. In this case, the mainstream portion W1 extending outward from the shelf portion 26 flows through the left and right side surface portions (left side surface portion) 23, and flows toward the inner shelf portion 26 due to gravity while flowing downward. Will be.

Gravitational acceleration is applied to the mainstream portion W1 from the outside toward the shelf portion 26, and the water collides with the washing water W flowing through the upper surface 26b of the shelf portion 26 with strong water force to wash from the upper surface 26b of the shelf portion 26. It knocks down the water W. Therefore, in the comparative example, the amount of washing water W that reaches the front portion 27 (see FIG. 5) of the bowl surface 21 is small.

On the other hand, in this example, since the washing water W discharged from the water discharge opening 33 is suppressed from spreading to the outside of the shelf 26, the washing water W having a strong water force once spread to the outside is the washing water W of the shelf 26. The washing water W does not hit the washing water W flowing on the upper surface 26b and is knocked down from the upper surface 26b of the shelf portion 26.

Next, the shape of the upper surface 26b in the vicinity of the upper end portion 26a of the shelf portion 26 will be described with reference to FIG. FIG. 8A is an explanatory diagram of an example in the vicinity of the upper end portion 26a of the shelf portion 26. FIG. 8B is an explanatory diagram of another example in the vicinity of the upper end portion 26a of the shelf portion 26. 8 (a) and 8 (b) show a schematic cross-sectional view in the vertical direction in the vicinity of the upper end portion 26a of the shelf portion 26.

As described above, the shelf portion 26 has an upper surface 26b through which the washing water W flows. As shown in FIG. 8A, the upper surface 26b of the shelf portion 26 has a forward inclined portion 261 inclined inward of the bowl surface 21 at the upper end portion 26a.

Further, as shown in FIG. 8B, the upper surface 26b of the shelf portion 26 has a flat portion 262 which is flat in the horizontal direction at the upper end portion 26a. The flat portion 262 does not have to be strictly flat, and may be substantially flat.

Here, the overall shape of the shelf portion 26 will be described with reference to FIG. FIG. 9 is a side view showing the shelf portion 26. As described above, the shelf portion 26 extends while descending from the region of the left and right side portions of the bowl surface 21 to the region of the front portion 27 of the bowl surface 21, and flows down on the region of the left and right side portions of the bowl surface 21. A portion of the wash water is directed to the area of the front 27.

Further, as shown in FIG. 9, the shelf portion 26 forms the above-mentioned upper surface 26b, which is a plane extending in the left-right direction with respect to the bowl surface 21. The upper surface 26b of such a shelf 26 forms a flow path through which the washing water easily flows, and the washing water can be guided along the shelf 26 to the left and right lower ends of the shelf 26. By providing the shelf portion 26 in this way, the washing water can reach the region of the front portion 27 of the bowl surface 21 even with a relatively small amount of washing water, and the bowl surface 21 can be reliably washed in a wide range. Can be done.

Further, the shelf portion 26 has a forward inclined portion (referred to as a first forward inclined portion) 261 shown in FIG. 8A, which is inclined toward the inside of the bowl surface 21 in the upper region thereof, and an inward facing bowl surface. A reverse inclined portion 263 which is an inclined surface inclined outward with respect to 21 and a second forward inclined portion which is an inclined surface inclined toward the inside of the bowl surface 21 in the lower region of the shelf portion 26. It has a portion 264 and. The shelf portion 26 is formed so as to be symmetrical with respect to the left and right center lines of the urinal body 2 (or the bowl surface 21).

When the upper end portion 26a of the shelf portion 26 is the flat portion 262 shown in FIG. 8B, the flat portion 262, the first forward inclined portion 261 and the reverse inclined portion 263, and the second forward inclined portion 26 are inclined from above. The parts are arranged in the order of 264.

Next, the drainage function by the protrusion 337 of the water discharge opening 33 will be described with reference to FIG. FIG. 10 is an explanatory diagram of the drainage function by the protrusion 337. Note that FIG. 10 shows a schematic front view of the water discharge opening 33. As described above, the protrusion 337 is provided on the lower surface of the protrusion 335 in the water discharge opening 33.

As shown in FIG. 10, in the protrusion 337 arranged in the center of the protrusion 335, the washing water W (residual water W3) remaining in the water passage 334 (see FIG. 4) is caused by gravity, for example, in the left-right direction. Gather from. The collected residual water W3 is retained until it reaches a predetermined amount due to the water film effect, and when the predetermined amount is reached, it falls from the protrusion 337. As a result, the residual water W3 of the water passage 334 can be dropped to the bowl surface.

As described above, according to the urinal 1 according to the embodiment, the mainstream portion W1 having the strongest water force among the washing water W discharged from the water discharge opening 33 rides on the shelf portion 26 and is guided by the shelf portion 26. While reaching the front 27 of the bowl surface 21. At that time, of the washing water W from the water discharge opening 33, the washing water W spreading to the outside of the shelf portion 26 joins the washing water W (mainstream portion W1) flowing through the shelf portion 26, but is on the outside of the shelf portion 26. The amount of the spread washing water W is smaller than that of the mainstream part W1 on the shelf part 26, and even if it joins the shelf part 26 later, the washing water W (mainstream part W1) flowing through the shelf part 26 is knocked down. Since there is no water force, most of the washing water W on the shelf portion 26 can reach the front portion 27 of the bowl surface 21. As a result, the front portion 27 of the bowl surface 21, which is easily soiled, can be washed more reliably, and the cleanability and cleanliness can be improved.

Further, since the shelf portion 26 has the forward inclined portion 261 or the flat portion 262 in the vicinity of the upper end portion 26a, the mainstream portion W1 of the washing water W discharged from the water discharge opening 33 can easily get on the shelf portion 26. Instead, it is possible to prevent the water force from dropping when the mainstream portion W1 collides with the upper end portion 26a of the shelf portion 26. Further, the mainstream portion W1 collides with the upper end portion 26a of the shelf portion 26 and widely spreads to the outside of the shelf portion 26, and the washing water W (mainstream portion W1) flowing through the shelf portion 26 thereafter is knocked down. It can be suppressed. As a result, the front portion 27 of the bowl surface 21, which is easily soiled, can be washed more reliably, and the cleanability and cleanliness can be improved.

Further, in the water discharge opening 33, the main flow portion W1 is set so that the water force is stronger inside than the outside of the upper end portion 26a, so that the main flow portion W1 of the washing water W discharged from the water discharge opening 33 is the upper end portion. A flow that collides with the inside of the 26a and rides on the shelf 26 toward the front portion 27 of the bowl surface 21 and a flow that descends inward from the upper end portion 26a are formed. As a result, it is unlikely that a flow that once rides on the shelf portion 26, but then spreads widely to the outside, and then knocks down the washing water W (mainstream portion W1) flowing through the shelf portion 26 is unlikely to occur. Therefore, most of the washing water W on the shelf portion 26 can reach the front portion 27 of the bowl surface 21, and the front portion 27 of the bowl surface 21, which is easily soiled, can be washed more reliably. Sexuality and cleanliness can be improved.

Further, when the upper end portion 26a of the shelf portion 26 has the forward inclined portion 261 or the flat portion 262, a small amount of washing water W flowing outside the mainstream portion W1 is discharged by the forward inclined portion 261 or the flat portion 262 to the shelf portion 26. The washing water W flowing through the shelf 26 can be merged with the washing water W flowing through the shelf 26 without knocking it down, and a large amount of the washing water W can reach the front portion 27 of the bowl surface 21. can. As a result, the front portion 27 of the bowl surface 21, which is easily soiled, can be washed more reliably, and the cleanability and cleanliness can be improved.

Further, in the water discharge opening 33, the protrusion 337 is provided on the lower surface of the protrusion 335, so that the wash water W remaining in the water passage 334 after the wash water W is discharged from the water discharge opening 33 (residual water). Since W3) gathers on the protrusion 337 and the collected washing water W (residual water W3) falls from the protrusion 337, the residual water W3 in the water passage 334 can be completely removed. This makes it possible to suppress the generation of drops from the water discharge opening 33.

Further, the bowl surface 21 has a shape that focuses inward at an inclination angle of a predetermined angle (for example, 60 °) or more as the left and right side surface portions 23 are directed downward when the bowl surface 21 is viewed from the front. The left and right side surface portions 23 are shaped so that there is almost no radius. In the bowl surface 21 where the washing water W (mainstream portion W1) flowing through the shelf portion 26 is easily knocked down by the flow returning to the inside of the washing water W spreading outside the shelf portion 26, the bowl surface 21 is easily soiled. The front portion 27 of the can be cleaned more reliably, and the detergency and cleanliness can be improved.

In the above-described embodiment, the automatic cleaning unit 3 and the water discharge device (spreader) 32 are provided, and the cleaning water is automatically discharged to the bowl surface 21. However, the present invention is not limited to this, and for example, the bowl. It may be configured to manually discharge the washing water to the surface 21. Even with such a configuration, as in the above-described embodiment, most of the washing water on the shelf portion 26 can reach the front portion 27 of the bowl surface 21, whereby the bowl surface 21 that is easily soiled can be reached. The front portion 27 of the bowl can be washed more reliably, and the cleanability and cleanliness can be improved.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments described and described above. Thus, various modifications can be made without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents.

1 Urinal 21 Bowl surface 23 Side surface 26 Shelf 26a Upper end 27 Front 32 Water spouting device (spreader)
33 Water discharge opening 34 Water supply flow path (spreader water supply flow path)
261 Forward slope 262 Flat part 332 Front wall part 333 Rear wall part 334 Waterway 335 Protrusion part 336 Narrow part 337 Protrusion W Washing water W1 Mainstream part

Claims (5)

The bowl surface that receives urine and
A water discharge device that discharges washing water to the bowl surface at the upper part of the bowl surface,
It is provided with a shelf portion that extends downward from both left and right sides of the bowl surface to the front portion of the bowl surface and guides a part of the washing water discharged from the water discharge device to the front portion of the bowl surface. It ’s a urinal,
The water discharge device is
A water discharge opening that opens the washing water so that it can be discharged toward the bowl surface,
A water supply flow path for supplying washing water from the water supply source to the inside of the spout opening is provided.
The water discharge opening is
Washing water that has a front wall portion that forms a front wall and a rear wall portion that forms a rear wall on the bowl surface side and is in contact with the bowl surface, and is discharged from the water discharge opening. A urinal characterized in that the mainstream portion having the strongest water force is set toward the upper end portion of the shelf portion. The shelf is
The urinal according to claim 1, wherein the urinal has a forward inclined portion in which the vicinity of the upper end portion is inclined inward, or a flat portion in which the vicinity of the upper end portion is flat. The water discharge opening is
The urinal according to claim 1 or 2, wherein the mainstream portion is set so that the water force is stronger inside than outside the upper end portion. The water discharge device is
A slit-shaped water passage formed between the front wall portion and the rear wall portion, a narrow portion in which the width of the water passage in the front-rear direction is partially narrowed, and a front from the rear wall portion. Claims 1 to 3, wherein the protrusion has a protrusion that protrudes to form the narrow portion, and a protrusion that protrudes downward from the lower surface of the protrusion and is separated from the bowl surface. Urinals listed in any one. The bowl surface is
It has left and right side surfaces that rise forward so as to form an inward side wall from both left and right ends.
The left and right side surfaces
The urinal according to any one of claims 1 to 4, wherein the urinal has a shape that focuses inward at an inclination angle of a predetermined angle or more as it goes downward in the front view of the bowl surface.

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