JP6455657B2 - urinal - Google Patents

Description

  The present invention relates to a spreader, and more particularly to a spreader that is provided on a bowl surface of a urinal and discharges cleaning water to the bowl surface.

The urinal is equipped with a spreader for discharging washing water. Wash water is supplied from the water supply pipe to the spreader, and the wash water is discharged from the spout of the spreader and flows down and cleans the inner surface of the urinal.
In such a conventional spreader, after the urinal is washed, that is, after the washing water discharged from the spreader is stopped, the residual water inside the spreader mainly drops as water droplets from the spout of the spreader. There was a problem that the phenomenon, a so-called dripping phenomenon occurred. Such a dripping phenomenon is a problem that the washing water does not flow down the bowl surface of the urinal but directly falls to the bottom of the urinal, causing the splashing of the washing water and giving the user an unpleasant appearance. Has occurred.

  Therefore, as described in Patent Document 1, a check valve that opens and closes according to the supply water pressure is attached to the inside of the water supply pipe, and when the supply water is stopped, the check valve is closed due to a decrease in the supply water pressure, There is known a spreader that prevents the cleaning water remaining in the water supply pipe from flowing into the spreader body and prevents dripping after the cleaning water stops.

  In addition, by disposing a mesh on the flow path inside the spreader body as described in Patent Document 2, a water film is formed based on the surface tension of water at the portion of the mesh when the faucet is stopped, Since this water film seals the wash water in the upstream portion of the mesh in the water supply pipe, a spreader is known that prevents dripping due to water remaining in the water supply pipe after the water stoppage.

JP-A-7-189329 Japanese Patent No. 3304047

However, when using a spreader with a check valve built into the water supply pipe, the spreader must be equipped with a check valve with a complicated mechanism, which inevitably increases the number of parts of the spreader and is expensive. There is a problem that becomes. In addition, problems such as the possibility that the check valve may not operate normally due to biting of dust etc. into the check valve, or that a separate structure for preventing the inflow of dust etc. is required arise. Yes.
In addition, when a mesh is provided on the flow path inside the spreader body, a structure including the mesh is required, which causes a problem that the structure of the spreader is complicated and the price is expensive. Further, since the mesh is provided on the flow path inside the spreader body, there is a problem that the pressure loss received by the washing water during the washing operation of the bowl surface of the urinal increases.

  The present invention has been made in order to solve the above-described problem. After the water discharge to the bowl surface of the urinal is completed, the bowl surface side rear wall portion has a relatively simple structure so that water drops are narrow in the narrow portion. It is possible to flow down from the bowl surface side rear wall portion to the bowl surface by surface tension. Accordingly, it is possible to prevent dripping of the residual water droplets directly falling from the front wall portion of the water discharge opening to the bottom of the bowl surface. In addition, when washing the bowl surface of the urinal, the pressure loss received by the wash water passing between the front wall and the bowl side rear wall can be suppressed, and the bowl surface can be washed efficiently. It aims to provide a urinal that can be.

In order to achieve the above object, the present invention provides a spreader that is provided on a bowl surface of a urinal and discharges cleaning water to the bowl surface, and the spreader discharges the cleaning water toward the bowl surface. A water discharge opening that opens, and a supply passage that supplies cleaning water from the water supply source into the water discharge opening. The water discharge opening includes a front wall that forms a wall on the front side of the water discharge opening, and a water discharge opening. A bowl surface-side rear wall portion that forms a wall portion on the bowl surface side of the portion and is in contact with the bowl surface, and further, a slit-shaped passage between the front wall portion and the bowl surface-side rear wall portion. A water passage is formed, and a narrow portion is formed in which the width of the water passage is partially narrowed below the outlet of the supply passage so that the surface of the water droplet is easily in contact with the surface of the rear wall portion on the bowl surface side . The outlet is connected to the rear wall on the bowl surface side and below the cross section of the flow path. Is formed in a semicircular shape, and the narrow portion is provided below the outlet of the supply passage that forms a semicircular channel cross section, and is smaller in the left-right direction than the width in the left-right direction of the outlet of the supply passage It is characterized by being formed by a table-like projecting portion having a width of .
In the present invention configured as described above, after the water discharge to the bowl surface of the urinal is completed, the residual water remaining in the supply passage flows out while gathering at the lower part of the semicircular channel cross section of the supply passage. . The outflowed residual water is provided below the outlet of the supply passage, and flows down along a trapezoidal protrusion having a lateral width smaller than the lateral width of the outlet of the supply passage. Therefore, when the residual water remaining in the supply passage falls as water droplets, the water tends to flow down along the narrow protrusions. When the residual water that has flowed out in this way falls as water droplets from the slit-shaped water passage between the front wall portion and the rear wall portion on the bowl surface side, the surface of the grown water droplets becomes the bowl surface in the narrow portion. It comes into contact with the surface of the side rear wall portion, is transmitted along the bowl surface side rear wall portion by surface tension, and can flow down from the bowl surface side rear wall portion to the bowl surface. Accordingly, it is possible to prevent dripping of the residual water droplets directly falling from the front wall portion of the water discharge opening to the bottom of the bowl surface.
Further, during the cleaning operation of the bowl surface of the urinal, the narrow portion is provided below the outlet of the supply passage that forms a semicircular channel cross section, and the width in the left-right direction of the outlet of the supply passage It is formed by a trapezoidal protrusion having a smaller width in the left-right direction. Thereby, the pressure loss which the washing water which passes between between a front wall part and a bowl surface side rear wall part receives can be suppressed, and a bowl surface can be wash | cleaned efficiently.

In the present invention, preferably, the narrow portion of the water discharge opening is formed by a protrusion provided on the bowl surface side rear wall.
In the present invention configured as described above, the narrow portion is formed by the protruding portion provided on the bowl surface side rear wall portion, so that the wash water flowing down to the protruding portion due to surface tension protrudes. It can be transmitted from the portion to the bowl surface side rear wall portion, and is more reliably guided to the bowl surface. In addition, even when cleaning water flows down to the side of the protruding portion, the cleaning water that flows down to the protruding portion due to surface tension can be transferred from the protruding portion to the rear wall portion on the bowl surface side. Guided to the surface.

In the present invention, preferably, the projecting portion extends downward from the front wall portion.
In the present invention configured as described above, when the residual water remaining in the supply passage descends as a water droplet from between the front wall portion and the bowl surface side rear wall portion, the protruding portion is the front wall portion. Therefore, the surface of the water droplet is separated from the lower end of the front wall portion, and is transferred to the protruding portion by the surface tension and flows downward. Therefore, water droplets can be more reliably guided to the bowl surface from the protruding portion of the bowl surface side rear wall. Accordingly, it is possible to prevent dripping of the residual water droplets directly falling from the front wall portion of the water discharge opening to the bottom of the bowl surface.

In the present invention, preferably, the front surface of the projecting portion is inclined toward the bowl surface of the urinal.
In the present invention configured as described above, since the front surface of the projecting portion is inclined toward the bowl surface of the urinal, water droplets can easily flow down from the front surface of the projecting portion along the bowl surface.

In the present invention, preferably, the protrusion is further formed to extend downward in the vertical direction.
In the present invention configured as described above, the protrusion is formed so as to extend downward in the vertical direction, so that when the water droplet flows down by its own weight, the protrusion can be transmitted to the bowl surface side rear wall from the protrusion. It can be transmitted to the part and is more reliably guided to the bowl surface.

In the present invention, preferably, the water discharge opening is further formed in a fan shape.
In the present invention configured as described above, water droplets can gather downward along the fan-shaped shape of the water discharge opening, the water droplets contact the surface of the bowl surface side rear wall portion, and the bowl surface side rear wall by surface tension Can flow down from the bowl surface side rear wall portion to the bowl surface. Accordingly, it is possible to prevent dripping of the residual water droplets directly falling from the front wall portion of the water discharge opening to the bottom of the bowl surface.

In the present invention, preferably, a urinal provided with a spreader is further provided.
In the urinal provided with the spreader of the present invention, residual water remaining in the supply passage at the end of cleaning of the bowl surface of the urinal becomes water droplets between the front wall portion and the bowl surface side rear wall portion. When falling, the surface of the grown water droplets comes into contact with the surface of the bowl surface side rear wall at the narrow part, and is transmitted to the bowl surface side rear wall part by the surface tension and from the bowl surface side rear wall part to the bowl surface. Can flow down. Accordingly, it is possible to prevent dripping of the residual water droplets directly falling from the front wall portion of the water discharge opening to the bottom of the bowl surface. In addition, when washing the bowl surface of the urinal, the pressure loss received by the wash water passing between the front wall and the bowl side rear wall can be suppressed, and the bowl surface can be washed efficiently. can do.

  According to the urinal of the present invention, after the water discharge to the bowl surface of the urinal is completed, the liquid in which water droplets of residual water directly drop from the front wall portion of the water discharge opening to the bottom of the bowl surface by a relatively simple structure. In addition to preventing dripping, the pressure loss experienced by the wash water that passes between the front wall and the rear wall on the bowl surface side can be suppressed during the cleaning operation of the bowl surface of the urinal. The bowl surface can be cleaned efficiently.

It is a center sectional view of a urinal provided with a spreader by an embodiment of the present invention. 1 is a schematic perspective view of a spreader according to an embodiment of the present invention with a front cover removed. FIG. It is a schematic front view of the state which removed the front cover of the spreader by the embodiment of the present invention. It is a schematic side view of the state which removed the front cover of the spreader by the embodiment of the present invention. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is an expanded partial sectional view which expands and shows a part of sectional drawing of FIG. It is a figure which shows a mode that a water droplet grows and becomes large in the enlarged part of the spreader shown in FIG.

  A urinal with a spreader according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the basic structure of a urinal will be described with reference to FIG. FIG. 1 is a central sectional view of a urinal having a spreader according to an embodiment of the present invention.

  As shown in FIG. 1, the code | symbol 1 shows the urinal by embodiment of this invention, and this urinal 1 is the toilet bowl main body 2 made from earthenware, and the automatic toilet bowl washing | cleaning for wash | cleaning this urinal body 2 A unit 4 is provided. The urinal 1 is a wall-mounted urinal that is attached along the wall surface behind the floor so that the lowermost part of the urinal is floated from the floor surface. It may be a urinal of the type.

  The urinal body 2 of the urinal 1 has a storage chamber 6 (shown schematically in FIG. 1 and omitted in other drawings) for storing the above-described automatic toilet cleaning unit 4 at the upper end, and this storage chamber. 6 is provided with a bowl surface 8 extending downward from the front surface 7 and a discharge port portion 12 formed at the bottom 10 of the bowl surface 8.

  The storage chamber 6 is formed by a lid 3 that is a separate body from the urinal body 2. Further, the front surface 7 of the storage chamber 6 is formed to be inclined rearward as will be described in detail later. Further, the countersink plate 14 is disposed in the discharge port portion 12. Furthermore, the discharge port portion 12 is connected to a drain trap pipe 16 and a drain pipe 18 arranged on the downstream side.

The automatic toilet cleaning unit 4 includes a water supply pipe 20 for supplying cleaning water from a water supply source such as a water supply,
A flow rate adjusting device 22 provided in the water supply pipe 20, an on-off valve 24 attached to the water supply pipe 20 for supplying and stopping water supply, a supply passage 26 for supplying cleaning water from the on-off valve 24 to a spreader described later, and a supply passage The spreader 28 which is a water discharger attached to the tip of 26, the human body detection sensor 30 for detecting the presence or absence of a user, the opening / closing valve 24 etc. based on the detection signal from the human body detection sensor 30, a predetermined control program, etc. And a control unit 32 that can be controlled.

  The flow rate adjusting device 22 is a constant flow valve that can adjust the cleaning water passing through the water supply pipe 20 to an appropriate constant flow rate. The flow rate adjusting device 22 may be configured by another device that can adjust the cleaning water to an appropriate flow rate using a flow rate sensor or the like. The flow rate adjusting device 22 may be configured to be controlled by the control unit 32. The on-off valve 24 is an electromagnetic valve that opens and closes the flow path of the water supply pipe 20 (and the flow path of the downstream supply passage 26) by a control signal from the control unit 32. The on-off valve 24 may be configured by another flow path opening / closing device capable of supplying and stopping water supply.

  In the present embodiment, the automatic toilet cleaning unit 4 includes an opening / closing valve 24 attached to the water supply pipe 20 for supplying and stopping water supply, and the control unit 32 opens and closes the opening / closing valve 24 to wash water into the supply passage 26. The supply start and stop are controlled.

The human body detection sensor 30 is an infrared sensor that detects the presence / absence of a user in front of the urinal 1 and the distance to the user. When it is detected by the human body detection sensor 30 that the user has added a use and is away from the urinal 1 by a predetermined distance, an operation signal is transmitted from the control unit 32, and the operation signal opens the on-off valve 24, Washing water is supplied from the supply passage 26 to the spreader 28 so that the bowl surface 8 of the urinal 1 is washed.
The control unit 32 receives the detection result of the presence or absence of the user of the human body detection sensor 30, and can control the urine washing operation by opening and closing the on-off valve 24.

  Returning to FIG. 1 again, the detailed structure of the urinal body 2 of the urinal 1 will be described. First, as shown in FIG. 1, the urinal 1 according to the present embodiment is a urinal of a type in which an automatic toilet cleaning unit 4 is stored in a storage chamber 6 formed at the upper end of the urinal body 2. In this embodiment, in such a type of urinal 1, the front surface 7 of the storage chamber 6 of the urinal body 2 is formed continuously with the bowl surface 8 and inclined rearward. In the urinal body 2, the front surface 7 of the storage chamber 6 is integrated with the bowl surface 8. Furthermore, the front surface 7 of the storage chamber 6 is formed continuously with the upper side of the bowl surface 8, and further, the lower side is formed to be inclined rearward. Here, “continuous” of the front surface 7 and the bowl surface 8 of the storage chamber 6 means that the front surface 7 and the bowl surface 8 of the storage chamber 6 are formed flush or substantially flush. Yes. Moreover, it does not need to be completely flush, and for example, there may be a small step, and it is sufficient that the washing water flowing from the front surface of the storage chamber 6 to the bowl surface 8 does not peel off.

The bowl surface 8 has an arc-shaped (arch-shaped) front portion 8 a that is open so that the front surface faces the user. The front portion 8a is formed of a concave curved surface that is continuous in the left-right direction. The front portion 8a of the bowl surface 8 is formed so as to be inclined downward from the upper end 8b of the bowl surface 8 downward from the lower side in the vertical direction. Accordingly, the central portion 8c of the front portion 8a is formed on the back side so as to gradually retreat downward from the upper end 8b.
The bottom portion 10 of the bowl surface 8 is formed in a bowl shape on the lower side thereof, and is formed so as to collect the wash water flowing down and guide it to the discharge port portion 12.

Next, as shown in FIGS. 2 to 8, the detailed structure of the spreader 28 will be described.
2 is a schematic perspective view of the spreader according to the embodiment of the present invention with the front cover removed, and FIG. 3 is a schematic front view of the spreader with the front cover removed of the embodiment of the present invention. 4 is a schematic side view of the spreader with the front cover removed according to an embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4, and FIG. FIG. 7 is a cross-sectional view taken along line -VI, FIG. 7 is an enlarged partial cross-sectional view showing a part of the cross-sectional view of FIG. 6 further enlarged, and FIG. 8 is an enlarged view of the spreader shown in FIG. It is a figure which shows a mode that a water droplet grows and becomes large.

As shown in FIG. 1 and the like, in this automatic toilet cleaning unit 4, the spreader 28 is attached to the front portion 8 a of the front surface 7 of the storage chamber 6 of the urinal body 2.
The spreader 28 includes a water discharge opening 34 that opens to discharge the cleaning water toward the bowl surface 8, and a circular pipe-shaped spreader supply passage 38 that supplies the cleaning water from the water supply source to the water discharge opening 34. Yes.

  The spreader supply passage 38 extends from the back side of the bowl surface 8 to the front side, and supplies the flow of cleaning water supplied into the spreader 28 to the water discharge opening 34. Since the spreader supply passage 38 is arranged on the downstream side of the on-off valve 24, the spreader supply passage 38 is filled with washing water immediately after the on-off valve 24 is changed from the opened state to the closed state. In this state, the wash water that is present on the downstream side of the on-off valve 24 and has not yet been discharged is gradually discharged from the water discharge opening 34 as residual water. The spreader supply passage 38 has a circular pipe shape, and the flow passage cross section at the downstream end thereof has a circular shape. Therefore, when the residual water gradually flows out of the spreader supply passage 38, the residual water gradually Will flow out while gathering in the central direction.

  The water discharge opening 34 is provided in the water discharge opening upper wall 34a that forms the left and right upper ends of the water discharge opening 34 and the water discharge opening 34, and forms a wall surface on the front side inside the water discharge opening 34. A front wall 34b is formed so that the wash water supplied from the supply passage 38 can collide and spread left and right, and a wall surface on the bowl surface 8 side on the rear side inside the water discharge opening 34 is formed. A bowl surface side rear wall portion 34c and a water passage 34l formed in a slit shape between the front wall portion 34b and the bowl surface side rear wall portion 34c are provided. The water passage 34l opens in a fan shape from the lower part to the left-right direction, and forms a fan-shaped opening passage between the left and right water discharge opening upper walls 34a, the front wall part 34b, and the bowl surface side rear wall part 34c. . Such a water discharge opening 34 can discharge water so that the cleaning water spreads to the vicinity of both left and right ends.

  The front wall portion 34 b is formed in a fan shape and forms the front surface of the spreader supply passage 38. The front wall portion 34 b is provided on the front side of the spreader supply passage 38 so as to face the outlet 38 a of the spreader supply passage 38. Therefore, the front wall portion 34 b can flow the cleaning water supplied from the spreader supply passage 38 so as to collide with itself and spread over the fan-shaped region of the water discharge opening 34. Here, the front wall part 34b is formed in the plane inclined toward the back from the perpendicular lower part.

  As shown in FIG. 5 and the like, the bowl surface side rear wall portion 34c is connected to the outlet 38a of the spreader supply passage 38 in the central upper region. The bowl surface side rear wall portion 34c is formed in a fan shape, and the cleaning water supplied from the spreader supply passage 38 is allowed to flow between the front wall portion 34b and the fan discharge region of the water discharge opening 34. It can be done. The bowl surface side rear wall portion 34c is attached so as to be in contact with or substantially in contact with the bowl surface 8, and the water droplets of the cleaning water transmitted on the bowl surface side rear wall portion 34c are formed from the lower part of the bowl surface side rear wall portion 34c. The bowl surface 8 can move along the surface.

  The bowl surface side rear wall portion 34c forms a plane substantially parallel to the front wall portion 34b, and is inclined from the lower side in the vertical direction toward the rear. The rearward inclination angle of the bowl surface side rear wall portion 34c is larger than the rearward inclination angle of the bowl surface 8 in the vicinity of the attachment position of the bowl surface side rear wall portion 34c, and the inclination angle with respect to the bowl surface 8 is further increased. It is formed within a range of 5 to 25 degrees. Therefore, the wash water discharged from the water discharge opening 34 toward the bowl surface 8 can hardly be rebounded, and the water droplets that flow down on the bowl surface side rear wall portion 34c are dropped from the lower portion of the bowl surface side rear wall portion 34c to the bowl surface 8. It is easy to be transmitted relatively smoothly.

  The bowl surface side rear wall portion 34c is formed with a protruding portion 34d that protrudes from the bowl surface side rear wall portion 34c toward the front wall portion 34b in a stepped shape. Between the front wall part 34b and the protrusion part 34d of the bowl surface side rear wall part 34c, the interval between the water passages 34l is reduced in the front-rear direction so that the surface of the water droplets generated in the residual water can easily come into contact with the surface of the protrusion part 34d. A narrow portion 34e is formed. The projecting portion 34d is formed to extend vertically downward from below the outlet of the spreader supply passage 38 in the vicinity of the center in the left-right direction of the bowl surface side rear wall portion 34c spreading in a fan shape. The cross section of the protrusion 34d in the left-right direction is substantially rectangular.

  The protrusion 34 d forms a rectangular parallelepiped portion in a part of the fan-shaped water discharge opening 34 on the lower side of the outlet of the spreader supply passage 38. More specifically, the projecting portion 34d forms a projecting portion front surface 34f that forms a flat surface with a constant width on the front side of the projecting portion 34d, and forms a side surface of the projecting portion 34d and is substantially perpendicular to the front side from the bowl surface side rear wall portion 34c. And a projecting portion lower surface 34h extending in the front-rear direction from the lower end of the projecting portion 34d to the rear end of the bowl surface side rear wall portion 34c.

  The projecting portion front surface 34f forms a plane substantially parallel to the front wall portion 34b. The protrusion front surface 34f is formed in a rectangular shape when viewed from the front. The protrusion front surface 34f is formed so that the width in the left-right direction is in the range of 3 mm to 8 mm, preferably in the range of 3 mm to 6 mm. By forming the protrusion front surface 34f with such a width in such a range, it is possible to prevent water droplets, which will be described later, from flowing down to the outside of the protrusion 34d without passing on the protrusion front surface 34f. It can be transmitted along the front surface 34f. The protrusion front surface 34f has an upper end disposed in the vicinity of the outlet 38a of the spreader supply passage 38, and a lower end disposed below the lower end 34j of the front wall portion 34b.

  The projecting portion front surface 34f of the projecting portion 34d provided on the bowl surface side rear wall portion 34c is also formed to be inclined rearward from the lower side in the vertical direction. Therefore, the washing water including the form of water droplets can easily flow down from the protrusion front surface 34 f toward the bowl surface 8 and can easily flow down along the bowl surface 8. Further, since the water drops are slanting toward the bowl surface 8, even if the water drops are separated from the lower surface 34 h of the projecting portion described later during the fall, the water drops again on the surface of the bowl surface 8 near the lower side. It can come into contact and flow down along the bowl surface 8.

The protrusion side surface 34g has a height in the front-rear direction so that an interval L2 of a predetermined narrow portion 34e described later is formed with respect to the interval (length) L1 of the water passage 34l in the front-rear direction of the water discharge opening 34. It is formed in length L3.
The protruding portion side surface 34g forms a corner portion 34i connected to the bowl surface side rear wall portion 34c. The washing water including the form of water droplets moves downward mainly along the protrusion front surface 34f. However, when water drops or the like drop on the protrusion side surface 34g or the bowl surface side rear wall portion 34c other than the protrusion, , And can flow down along the corner 34i. At this time, since the corner portion 34i is provided on the bowl surface side rear wall portion 34c side, water droplets or the like flowing down along the corner portion 34i can be transmitted from the bowl surface side rear wall portion 34c to the bowl surface 8. it can. In addition, the corner | angular part 34i may be comprised by the curved part curved gently.

The narrow portion 34e is a water passage formed in a part of the water passage 34l between the front wall portion 34b and the protruding portion front surface 34f of the bowl surface side rear wall portion 34c. After the water has stopped, water present in the water discharge opening 34 and / or the spreader supply passage 38 gradually gathers or separates, so that water drops grow, and such water drops have a certain diameter (size). Then it falls by its own weight. That is, when the water droplet has a certain diameter in the narrow portion 34e, the movement starts downward. The size (length) L2 of the water channel in the front-rear direction of the narrow portion 34e is a value of a diameter (for example, a diameter of about 2 mm) that starts moving downward when the average water droplet has a certain diameter. In the vicinity of the value). That is, the size of the narrow portion 34e is formed to a size corresponding to the size of the water droplet immediately before the drop starts due to its own weight.
The distance L2 between the narrow portions 34e may be formed to be smaller than the diameter of the water droplet that starts to drop, and may be less than the diameter of the water droplet that starts to drop. It may be formed up to about 5 times larger. Specifically, the distance L2 between the narrow portions 34e is formed such that the size in the front-rear direction is 1 mm to 3 mm. By forming the distance L2 between the narrow portions 34e to be equal to or smaller than the average water droplet diameter, the water droplets easily come into contact with the protrusion front surface 34f.
Therefore, when the water present in the water discharge opening 34 and / or the spreader supply passage 38 grows mainly as water droplets by gradually gathering or separating, for example, when the size of the water droplets starts falling, It comes into contact with the protruding portion front surface 34f of the bowl surface side rear wall portion 34c, or the front wall portion 34b and the protruding portion front surface 34f. Since the water droplet contacts the protrusion front surface 34f, the water droplet flows down (moves downward) along the protrusion front surface 34f due to the surface tension. Even when the residual water in the spreader 28 becomes a water mass or a water flow larger than the water droplets, they can flow down to the bowl surface 8 in the same manner through the protrusion front surface 34f.

  The distance between the front wall portion 34b and the protrusion front surface 34f is formed to be a substantially constant distance (L2 size) from the upper portion of the protrusion front surface 34f to the lower end 34j of the front wall portion 34b. Accordingly, the narrow portion 34e has an interval at which the surface of the water droplet contacts the protrusion front surface 34f when the water droplet grows (increases) in any portion from the upper part to the lower part of the protrusion front surface 34f. It is formed in size.

  The projecting portion lower surface 34h extends rearward from the projecting portion front surface 34f to the vicinity of the bowl surface 8. Accordingly, the water droplets descending downward along the protrusion front surface 34f can be transmitted on the surface of the protrusion lower surface 34h by the surface tension, and can be transmitted from the protrusion lower surface 34h to the bowl surface 8.

The protrusion 34d described above extends downward from the front wall 34b. That is, the projecting portion front surface 34f of the projecting portion 34d extends below the lower end of the front wall portion 34b, and the projecting portion lower surface 34h is also formed below the center lower end 34j of the front wall portion 34b. In addition, the lower end of the bowl surface side rear wall part 34c may be extended below the front wall part 34b in accordance with the protrusion part 34d extending below the front wall part 34b. As shown in FIGS. 3 and 5, when viewed from the front side of the spreader 28, the lower end of the protrusion front surface 34 f extends below the lower end 34 j of the front wall portion 34 b to form a lower edge 34 k that can be seen from the user side. It is in a state. Moreover, the lower edge 34k of the bowl surface side rear wall part 34c forms the sector shape which spreads below from the lower end 34j of the front wall part 34b.
In the spreader according to the embodiment of the present invention, the protruding portion 34d and the bowl surface side rear wall portion 34c extend below the front wall portion 34b. However, in the spreader according to another embodiment, the protruding portion 34d and When viewed from the front side of the spreader 28, the bowl surface side rear wall portion 34c has a lower end of the projecting portion front surface 34f and a lower edge 34k of the bowl surface side rear wall portion 34c substantially the same height as the lower end 34j of the front wall portion 34b. May be arranged on the same plane.
In addition, also when the protrusion part 34d is provided in the front wall part 34b side, the narrow part 34e in which the width | variety of the water flow path 34l is partially narrowed can be formed, and the surface of a water droplet is a bowl surface side rear wall. It can make it easy to contact the surface of the part 34c.

Next, the cleaning operation of the urinal 1 provided with the spreader 28 according to the embodiment of the present invention will be described.
First, the flow of the washing operation by the urinal 1 provided with the spreader 28 according to the embodiment of the present invention will be described.
Normally, when the user stands in front of the urinal 1, the human body detection sensor 30 detects the presence of the user and sends detection information to the control unit 32, and the control unit 32 recognizes the presence of the user. When the user finishes urination on the bowl surface 8 of the urinal 1 and the user who has finished urination leaves from the front of the urinal 1 and the human body detection sensor 30 is in a non-detection state, the control unit 32 causes the user to urinate the urinal. The control unit 32 determines that it has left 1 and starts the cleaning operation. In addition, the cleaning operation in the urinal 1 includes a so-called facility protection cleaning operation that starts a cleaning operation for flowing cleaning water through the urinal 1 when the control unit 32 determines that it is necessary for protection of facilities such as piping. It is.

  In the cleaning operation, the control unit 32 sends a control signal to the on-off valve 24 to open the on-off valve 24 and supply the cleaning water supplied from the water supply pipe 20 to the supply passage 26. The cleaning water is supplied from the supply passage 26 to the spreader supply passage 38 of the spreader 28.

  Inside the spreader 28, the wash water that collides with the front wall portion 34b from the spreader supply passage 38 at a relatively high flow rate is discharged so as to spread in a fan-shaped radial form from below to the left and right sides. Accordingly, the wash water discharged from the water discharge opening 34 is discharged so as to spread from between the left and right water discharge opening upper walls 34 a in the left-right direction of the urinal 1, and in the front-rear direction of the urinal 1 The ink is discharged rearward from between the wall portion 34b and the bowl surface side rear wall portion 34c toward the rear bowl surface 8.

  When the cleaning water is discharged from the water discharge opening 34, the protruding portion 34d is formed in a part of the bowl surface side rear wall portion 34c, so that the cleaning water is the front wall portion 34b in the region of the water passage 34l. Is discharged through both the region of the narrow portion 34e between the projection 34d and the region between the front wall 34b and the bowl surface side rear wall 34c other than the projection 34d. Therefore, the pressure loss due to the cleaning water passing through the region of the narrow portion 34e is relatively suppressed, and the pressure loss received by the cleaning water passing between the front wall portion 34b and the bowl surface side rear wall portion 34c is suppressed. The bowl surface 8 can be efficiently cleaned without greatly reducing the water flow of the cleaning water discharged from the water discharge opening 34.

In this way, the washing water discharged from the water discharge opening 34 of the spreader 28 flows in a radial direction from the spreader 28 so as to spread over the surface of the bowl surface 8, and while flowing down the bowl surface 8, the entire bowl surface 8. Good cleaning can be performed. The washing water flows down the bowl surface 8 and is discharged from the discharge port 12, passes through the downstream drain trap pipe 16, and further flows toward the downstream drain pipe 18.
When water discharge from the water discharge opening 34 of the spreader 28 is continued for a certain period of time, the control unit 32 closes the on-off valve 24, ends water discharge from the spreader 28, and ends the cleaning operation.

Next, the operation after the end of water discharge from the end of water discharge of the spreader 28 according to the embodiment of the present invention (when the on-off valve 24 is closed) will be described.
In the cleaning operation as described above, the control unit 32 closes the opening / closing valve 24 when a predetermined time has elapsed from the start of water discharge, and when the water discharge from the spreader 28 is ended after determining the end of water discharge.
Immediately after the on-off valve 24 is closed, the spreader supply passage 38 and the water discharge opening 34 on the downstream side of the on-off valve 24 are filled with cleaning water. This washing water is defined as residual water, gradually being replaced with air entering from the water discharge opening 34 and gradually flowing out from the water discharge opening 34.
The residual water that flows out flows down as water droplets from between the front wall portion 34b and the bowl surface side rear wall portion 34c. For example, as shown in FIG. 8, a water droplet D0 is generated between the front wall portion 34b and the bowl surface side rear wall portion 34c and grows gradually when the water droplets are combined, and the water droplet has a certain diameter. Then it falls by its own weight. In FIG. 8, an example of a water droplet that has grown to a size just before the start of dropping is indicated by reference numeral D <b> 1. At this time, when the diameter of the water droplet grows in the narrow portion 34e so that the diameter of the water droplet falls due to its own weight, the water droplet is projected to the front surface portion 34f of the bowl surface side rear wall portion 34c, or the front wall portion 34b and the protruding portion. It will contact the front surface 34f. If the surface of the water droplet comes into contact with the protrusion front surface 34f, the water droplet moves due to surface tension so as to be transmitted to the protrusion front surface 34f. Therefore, the water droplet moves vertically downward along the protrusion front surface 34f or the front wall portion 34b and the protrusion front surface 34f.

When the water droplet moves downward while touching both the front wall portion 34b and the protrusion front surface 34f and descends to the position of the lower end 34j of the front wall portion 34b, the protrusion front surface 34f extends downward from the front wall portion 34b. Therefore, the water droplet is guided away from the front wall portion 34b and transmitted to the projection front surface 34f (for example, the state of the water droplet at this time is indicated by the reference symbol D2). Therefore, this water droplet is transmitted from the lower end of the protrusion front surface 34f to the protrusion lower surface 34h. The water droplet D2 is transmitted along the path as shown by the broken line arrow A on the lower surface 34h of the protruding portion, is guided so as to contact the bowl surface 8, and flows down while contacting the bowl surface 8.
Therefore, as described above, when the water droplet descends to the position of the lower end 34j of the front wall portion 34b, the water droplet moves vertically downward from the lower end 34j of the front wall portion 34b toward the bottom portion 10 of the bowl surface 8. It is possible to prevent the liquid from dropping as a drop of liquid without being transmitted.

  Thus, according to the spreader 28 of this embodiment, the water droplet D2 flows down along the bowl surface 8 along the protruding portion lower surface 34h from the spreader 28, so that the water droplet D2 is smoothly transmitted on the bowl surface 8. Since it can be made to flow down, it looks good to the user and does not impair the quality of the user. Moreover, it is possible to prevent the appearance of the appearance, the splashing and scattering of water, and the generation of the falling sound of the water droplets due to the water droplets falling into the bottom 10 as a droplet. Water droplets flowing down along the bowl surface 8 flow into the discharge port 12 and are drained.

  Moreover, since the water discharge opening 34 is formed in a fan shape, water droplets generated inside the water discharge opening 34 tend to gather in the narrow portion 34e and / or the protrusion 34d while moving downward along the fan shape. Thus, the generated water droplets are easily transmitted from the bowl surface side rear wall portion 34c to the bowl surface 8, and are transmitted to the bowl surface 8 and flow down.

Next, the operational effects of the spreader 28 according to the above-described embodiment of the present invention will be described.
According to the above-described spreader 28 according to the present embodiment, after the water discharge to the bowl surface 8 of the urinal 1 is completed, residual water remaining in the supply passage 26 and / or the spreader supply passage 38 is removed from the front wall portion 34b and the bowl. When falling as water droplets from the slit-shaped water passage 34l between the surface side rear wall portion 34c and the surface of the grown water droplets comes into contact with the surface of the bowl surface side rear wall portion 34c at the narrow portion 34e, It can flow along the bowl surface side rear wall portion 34c by the tension, and flow down from the bowl surface side rear wall portion 34c to the bowl surface 8. Accordingly, it is possible to prevent the dripping of the residual water from the front wall portion 34b of the water discharge opening 34 directly onto the bottom portion 10 of the bowl surface 8.
Further, when the bowl surface 8 of the urinal 1 is washed, the narrow portion 34e is formed in a part of the slit-shaped water passage 34l, so that the front wall portion 34b and the bowl surface side rear wall portion 34c are formed. The pressure loss received by the wash water passing between the two can be suppressed, and the bowl surface 8 can be washed efficiently.

  Further, in the spreader 28 according to the present embodiment, the narrow portion 34e is formed by the protruding portion 34d provided on the bowl surface side rear wall portion 34c, so that the cleaning flows down to the protruding portion 34d due to surface tension. Water can be transmitted from the protruding portion 34d to the bowl surface side rear wall portion 34c, and is more reliably guided to the bowl surface 8. Further, even when the cleaning water flows down to the side surface of the protrusion 34d, the cleaning water flowing down to the protrusion 34d due to surface tension can be transmitted from the protrusion 34d to the bowl surface side rear wall 34c, It is more reliably guided to the bowl surface 8.

  Further, in the spreader 28 according to the present embodiment, the residual water remaining in the supply passage 26 and / or the spreader supply passage 38 falls as water droplets from between the front wall portion 34b and the bowl surface side rear wall portion 34c. Since the protruding portion 34d extends below the lower end of the front wall portion 34b, the surface of the water droplet is separated from the lower end of the front wall portion 34b and flows downward to the protruding portion 34d due to surface tension. Become. Therefore, water droplets can be guided to the bowl surface 8 more reliably from the projecting portion 34d of the bowl surface side rear wall portion 34c. Accordingly, it is possible to prevent the dripping of the residual water from the front wall portion 34b of the water discharge opening 34 directly onto the bottom portion 10 of the bowl surface 8.

  Further, in the spreader 28 according to the present embodiment, since the protrusion front surface 34f is inclined toward the bowl surface 8 of the urinal 1, water droplets can easily flow down from the protrusion front surface 34f along the bowl surface 8. Can do.

  In the spreader 28 according to the present embodiment, the protrusion 34d is formed so as to extend downward in the vertical direction, so that when the water droplet flows down by its own weight, the protrusion 34d can be transmitted to the bowl surface from the protrusion 34d. It can be transmitted to the side rear wall 34c and is guided to the bowl surface 8 more reliably.

  Further, in the spreader 28 according to the present embodiment, water droplets can be gathered downward along the fan-shaped shape of the water discharge opening 34, the water droplets contact the surface of the bowl surface side rear wall portion 34c, and the surface of the bowl surface side by surface tension. It can flow along the rear wall part 34c, and can flow down from the bowl surface side rear wall part 34c to the bowl surface 8. Accordingly, it is possible to prevent the dripping of the residual water from the front wall portion 34b of the water discharge opening 34 directly onto the bottom portion 10 of the bowl surface 8.

Further, in the spreader 28 according to the present embodiment, the residual water remaining in the supply passage 26 and / or the spreader supply passage 38 at the end of the cleaning of the bowl surface 8 of the urinal 1 When falling as a water droplet from between the wall portion 34c, the surface of the grown water droplet is in contact with the surface of the bowl surface side rear wall portion 34c at the narrow portion 34e, and the bowl surface side rear wall portion 34c is moved by the surface tension. It can flow down from the bowl surface side rear wall portion 34c to the bowl surface 8. Accordingly, it is possible to prevent the dripping of the residual water from the front wall portion 34b of the water discharge opening 34 directly onto the bottom portion 10 of the bowl surface 8.
Further, during the cleaning operation of the bowl surface 8 of the urinal 1, it is possible to suppress the pressure loss received by the cleaning water passing between the front wall portion 34 b and the bowl surface side rear wall portion 34 c. 8 can be efficiently cleaned.

DESCRIPTION OF SYMBOLS 1 Urinal 2 Urinal body 3 Lid 4 Automatic toilet cleaning unit 6 Storage room 7 Front surface 8 Bowl surface 8a Front part 8b Upper end 8c Center part 10 Bottom part 12 Outlet part 14 Drain plate part 16 Drain trap pipe 18 Drain pipe 20 Water supply Pipe 22 Flow rate adjusting device 24 On-off valve 26 Supply passage 28 Spreader 30 Human body detection sensor 32 Control unit 34 Water discharge opening 34a Water discharge opening upper wall 34b Front wall 34c Bowl surface side rear wall 34d Projection 34e Narrow part 34f Projection Front surface 34g Protruding portion side surface 34h Protruding portion lower surface 34i Corner portion 34j Lower end 34k Lower edge 34l Water passage 38 Spreader supply passage 38a Outlet A Broken line arrow D0 Water droplet D1 Water droplet D2 Water droplet

Claims (7)

A spreader that is provided on a bowl surface of a urinal and discharges washing water to the bowl surface, the spreader,
A water discharge opening that opens to discharge the cleaning water toward the bowl surface;
A supply passage for supplying cleaning water from the water supply source into the water discharge opening,
The water discharge opening is
A front wall forming a wall on the front side of the water discharge opening,
A bowl surface side rear wall portion that forms a wall portion on the bowl surface side of the water discharge opening and is in contact with the bowl surface;
Further, a slit-shaped water passage is formed between the front wall portion and the bowl surface side rear wall portion, and the width of the water passage is such that the surface of the water droplet can easily come into contact with the surface of the bowl surface side rear wall portion. A narrow portion that is partially narrowed below the outlet of the supply passage is formed ,
The outlet of the supply passage is connected to the bowl surface side rear wall, and the lower side of the channel cross section is formed in a semicircular shape, and the narrow portion has a semicircular channel cross section. A spreader, which is provided below the outlet of the supply passage to be formed and is formed by a table-like protrusion having a width in the left-right direction smaller than the width in the left-right direction of the outlet of the supply passage .   The spreader according to claim 1, wherein the narrow portion of the water discharge opening is formed by a protrusion provided on the bowl surface side rear wall.   The spreader according to claim 2, wherein the protruding portion extends downward from the front wall portion.   The spreader according to claim 2 or 3, wherein a front surface of the protruding portion is inclined toward the bowl surface of the urinal.   The spreader according to any one of claims 2 to 4, wherein the protrusion is formed to extend downward in the vertical direction.   The spreader according to any one of claims 1 to 5, wherein the water discharge opening is formed in a sector shape.   A urinal comprising the spreader according to any one of claims 1 to 6.

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