JP2017150257A - Washing water tank device and flush toilet bowl including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress leakage to the outside of an inner tank of water that drips from a hand washing bowl part to a water receiving part.SOLUTION: A washing water tank for storing washing water for washing a toilet bowl includes: a hand washing water discharge part for discharging water; a hand washing bowl part which receives the water discharged from the hand washing water discharge part and in which a drain port 4b for discharging received water is opened; an outer tank provided below the hand washing bowl part; an inner tank provided inside the outer tank; and a water receiving part 20 having a bottom surface 22a for receiving the water discharged from the drain port and an inside wall surface 24a formed so as to extend upward from a peripheral edge of the bottom surface, and provided at an upper part of the inner tank. The inside wall surface of the water receiving part is formed in a curve shape swelling toward the outside of the water receiving part.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a washing water tank apparatus having a water discharge unit for hand washing, and more particularly to a washing water tank apparatus for storing washing water for washing a toilet and a flush toilet equipped with the same.

Conventionally, as a washing water tank apparatus for washing a toilet bowl, a washing water tank apparatus in which an inner tank made of a synthetic resin is arranged in a ceramic outer tank and a lid is attached to the inner tank is known (for example, , See Patent Document 1).
Components such as a float valve device are arranged inside the inner tank of the cleaning water tank device in Patent Document 1. In this washing water tank apparatus, a hand-washing bowl (hand-washing bowl part) is placed on the upper surface of the outer tank, and a hand-washing water discharge pipe (hand-washing water discharge part) is erected on the hand-washing bowl. In addition, a drain outlet is opened at the bottom of the hand basin, and a water receiving trough (water receiving part) formed integrally with the lid of the inner tank is provided at a position facing the drain outlet. The water receiving trough is provided with an outlet facing the front wall in the inner tank.

  In such a conventional washing water tank device, water dropped from the hand basin is received by the water receiving bowl provided integrally with the lid and flows out to the front wall of the inner tank. It is possible to suppress scattering to a device or the like.

Japanese Patent Laid-Open No. 11-324058

However, in the conventional washing water tank apparatus described above, the channel between the drainage port of the handwashing basin and the water receiving basin is not a sealed channel, that is, from the drainage port of the handwashing basin to the water catching basin, the outside of the inner tank. A gap is formed to communicate with the. Therefore, there is a concern that the falling water from the hand basin hits the bottom surface of the water receiving bowl and the water is scattered, and the water leaks to the outside of the inner tank through this gap. In addition, after a predetermined time has passed since the water started to drain from the drain of the hand basin, water accumulated in the water basin, and the falling water from the hand basin hit the surface of the water collected in the water basin. There is also a concern that water will scatter and water will leak out of the inner tank through the gap.
In this way, if water leaks to the outside of the inner tank, water may leak out of the cleaning water tank device through the gap between the outer tank and the inner tank, or electronic equipment may be placed near the inner tank. In such a case (for example, when the washing water tank device and the warm water washing toilet seat device are integrally configured), there is a concern that electric leakage or equipment failure may occur.

  The present invention has been made to solve the above-described problem, and a washing water tank device capable of suppressing the falling water from the hand-washing bowl portion to the water receiving portion from leaking to the outside of the inner tank. And it aims at providing the flush toilet provided with it.

  In order to achieve the above object, according to the washing water tank apparatus according to one aspect of the present invention, the washing water tank apparatus stores the washing water for washing the toilet bowl, and includes a hand washing water discharging unit for discharging water, and a hand washing A hand-washing bowl portion having a drain opening for receiving water discharged from the water discharge portion and discharging the received water; an outer tank provided below the hand-washing bowl portion; an inner tank provided in the outer tank; A water receiving portion provided on the upper part of the inner tank, and having a bottom surface for receiving water discharged from the drain outlet and an inner wall surface formed so as to extend upward from the peripheral edge of the bottom surface. The inner wall surface of the receiving portion is formed in a curved shape that bulges toward the outer side of the water receiving portion.

According to this configuration, since the inner wall surface of the water receiving portion is formed in a curved shape that bulges toward the outside of the water receiving portion, the water flowing into the water receiving portion from the drain port of the hand-washing bowl portion is It flows so as to return to the inside of the water receiving portion along the inner wall surface from the bottom surface of the water receiving portion. Thereby, scattering of the water which fell from the drain outlet of the hand-washing bowl part to the water receiving part is suppressed. Therefore, it can suppress that the water falling from the hand-washing bowl part to the water receiving part leaks outside the inner tank.
Moreover, since the inner wall surface of the water receiving portion is formed in a curved shape that bulges toward the outside of the water receiving portion, it has returned from the bottom surface of the water receiving portion to the inside of the water receiving portion along the inner wall surface. The water covers the water that has flowed in sequentially from the hand-washing bowl to the water receiver. Thereby, the scattering of the water which generate | occur | produces when the water which fell to the water receiving part from the drain outlet of the hand-washing bowl part hits the water surface of the water collected in the water receiving part is suppressed. Therefore, it can suppress that the water falling from the hand-washing bowl part to the water receiving part leaks outside the inner tank.

  In the cleaning water tank apparatus according to one aspect of the present invention, preferably, a protrusion projecting inward is provided on an upper portion of the inner wall surface of the water receiving portion.

  According to this configuration, since the protrusion protruding inward is provided on the upper part of the inner wall surface of the water receiving part, the water returning from the bottom surface of the water receiving part along the inner wall surface to the inside of the water receiving part is The flow from the inner wall surface along the protrusion is suppressed from flowing upward from the protrusion. As a result, the water that has returned to the inside of the water receiving portion is prevented from flowing upwardly from the water receiving portion, and the water that has flowed sequentially from the hand-washing bowl portion to the water receiving portion to the inside of the water receiving portion. The returned water can be covered more reliably. Therefore, it can suppress more reliably that the falling water from a hand-washing bowl part to a water receiving part leaks outside the inner tank.

  In the cleaning water tank apparatus according to one aspect of the present invention, preferably, the water receiving portion has an outlet that discharges the received water to the inner tank, and the bottom surface of the water receiving portion faces the outlet. Inclined downward.

  According to this configuration, since the bottom surface of the water receiving portion is inclined downward toward the outlet, the remaining water in the water receiving portion can be discharged to the inner tank. Moreover, since the fall water from the drain outlet of a hand-washing bowl part can be received by the inclined surface of the bottom face of a water receiving part, the upward water splash can be suppressed compared with the case where water is received in a plane. Therefore, it is possible to more reliably suppress the falling water from the hand-washing bowl portion to the water receiving portion from leaking outside the inner tank while improving the drainage performance in the water receiving portion.

  One embodiment of the present invention is a flush toilet provided with a flush water tank device.

  According to this configuration, in the flush toilet provided with the washing water tank device, it is possible to suppress the falling water from the hand washing bowl portion to the water receiving portion from leaking to the outside of the inner tank.

  ADVANTAGE OF THE INVENTION According to this invention, in the washing water tank apparatus and the flush toilet provided with it, it can suppress that the fall water from a hand-washing bowl part to a water receiving part leaks outside the inner tank.

It is a perspective view of the washing water tank device concerning one embodiment of the present invention. It is a top view of the washing water tank device concerning one embodiment of the present invention. It is sectional drawing seen along the III-III line of FIG. It is a perspective view of the inner tank concerning one embodiment of the present invention. It is a disassembled perspective view of the inner tank which concerns on one Embodiment of this invention. It is a perspective view of the water receiving part which concerns on one Embodiment of this invention. It is a rear view of the water receiving part which concerns on one Embodiment of this invention. It is sectional drawing seen along the VIII-VIII line of FIG. It is explanatory drawing which represented typically the flow of the water in the water receiving part which concerns on one Embodiment of this invention. It is sectional drawing seen along the XX line of FIG.

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

<Configuration of washing water tank device>
First, with reference to FIGS. 1-5, the washing water tank apparatus which concerns on one Embodiment of this invention is demonstrated. In the following description, the directions shown in the figure are used.

  FIG. 1 is a perspective view of a cleaning water tank apparatus according to an embodiment of the present invention. FIG. 2 is a top view of the cleaning water tank apparatus according to one embodiment of the present invention. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a perspective view of an inner tank according to an embodiment of the present invention. FIG. 5 is an exploded perspective view of the inner tank according to the embodiment of the present invention.

  As shown in FIG.1 and FIG.2, the washing water tank apparatus 1 which stores the washing water which wash | cleans a toilet bowl is provided above the flush toilet which is not shown in figure, the hand-washing water discharging part 2 which discharges water, and a hand-washing water discharging part The hand-washing bowl part 4 which receives the water discharged from 2 and the outer tank 6 provided under the hand-washing bowl part 4 are provided. Furthermore, the washing water tank apparatus 1 includes an inner tank 8 provided in the outer tank 6 and a water receiving portion 20 fixed to the upper portion of the inner tank 8 (see FIG. 3).

  The hand-washing water discharge part 2 is provided in the left-right center part of the rear edge part of the upper surface of the bowl-shaped hand-washing bowl part 4. Further, a bowl surface 4 a that is recessed downward from above is formed on the upper surface of the hand-washing bowl portion 4. In the top view, a drain outlet 4b is opened at the center of the bowl surface 4a. The drain port 4b is formed so as to extend downward in a cylindrical shape from the hand-washing bowl portion 4, and the inner tank 8 is disposed so that the lower portion of the drain port 4b is surrounded by a cylinder portion 12b of the lid 12 described later. . That is, the height position of the upper end portion of the cylinder portion 12b of the lid 12 described later is higher than the height position of the lower end portion of the drain port 4b, and the lower portion of the drain port 4b is part of the cylinder portion of the lid 12. 12b. Water discharged from the hand-washing water discharge unit 2 and received by the bowl surface 4a is discharged from the drain port 4b through the lid 12 into the inner tank 8 described later.

  As shown in FIGS. 3 to 5, the hand-washing bowl portion 4 and the outer tank 6 are formed of ceramics, and an inner tank 8 is provided inside the outer tank 6 and below the hand-washing bowl portion 4. ing.

  The inner tank 8 has a tank body 10, a lid 12, a drainage device 14, and an operation device 16. The inner tank 8 as a whole has a horizontally long, substantially rectangular parallelepiped shape, and washing water for washing the toilet bowl is stored in the inner tank 8. The stored wash water is supplied to a flush toilet (not shown) from a discharge port 18 described later by operating the operation device 16 or the like.

  The tank body 10 as a whole has a substantially rectangular parallelepiped shape that is long in the left-right direction, and is configured in a box shape. The tank body 10 is formed of a resin material, and cleaning water is stored in the tank body 10. An opening 10 a that opens upward is formed on the upper portion of the tank body 10, and a lid 12 is provided so as to close the opening 10 a and conceal the inside of the tank body 10. Further, a discharge port 18 for supplying water stored in the tank body 10 to the toilet is opened on the bottom surface of the tank body 10.

  The lid 12 has a plate-like flat plate portion 12a which is a base portion having an outer shape corresponding to the opening 10a of the tank body 10, and a cylindrical portion 12b formed so as to extend upward from the flat plate portion 12a. Yes. A fixing portion such as an engagement piece for fixing to the upper portion of the tank body 10 is provided on the periphery of the flat plate portion 12a. The cylinder part 12 b is arranged vertically below the drain port 4 b of the hand-washing bowl part 4. Moreover, the upper part of the cylinder part 12b which concerns on this embodiment is formed in a substantially ellipse shape in top view, and has opened the upper side in the substantially ellipse shape along the external shape. Within the cylinder part 12b, there are a base part 12d extending horizontally from an elliptical inner wall between the upper part and the lower part of the cylinder part 12b, and a vertical surface 12e extending downward from the linear front end of the base part 12d. Is formed. For this reason, the lower part of the cylinder part 12b is formed in the shape where the substantially elliptical rear end part was cut in top view. Furthermore, the water receiving part 20 is fitted inside the cylinder part 12b. The water receiving portion 20 is detachably attached to the cylindrical portion 12b, and the outer shape of the water receiving portion 20 is cut at a substantially elliptical rear end portion when viewed from above so that the outer shape can be fitted inside the cylindrical portion 12b. It is formed in such a shape.

  Further, at the left rear and right rear of the cylindrical portion 12b, a gap forming portion 12c is formed that protrudes leftward and rightward from the cylindrical portion 12b and extends in the vertical direction to form a space communicating with the inside of the cylindrical portion 12b. Has been. The lower end of the gap forming portion 12c opens downward, and the interior of the tank body 10 communicates with the internal space extending vertically within the gap forming portion 12c in a state where the lid 12 closes the opening 10a. ing. Further, in a state where the water receiving part 20 is fixed in the cylindrical part 12b, the opening at the upper end of the cylindrical part 12b communicates with the interior of the water receiving part 20 and the internal space of the gap forming part 12c. That is, the water discharged from the drain port 4b flows from the opening at the upper end of the cylindrical portion 12b to the water receiving portion 20, and flows from the water receiving portion 20 to the inside of the tank body 10 through the internal space of the gap forming portion 12c.

  The drainage device 14 is provided inside the tank body 10 and above the discharge port 18 of the tank body 10. By opening and closing the discharge port 18 by the drainage device 14, the wash water stored in the tank body 10 is supplied to the flush toilet or the wash water is stored in the tank body 10. The drainage device 14 includes an overflow pipe 14a, a valve body 14b, a ball chain 14c, and a guide portion 14d.

The overflow pipe 14a is a cylindrical member extending in the vertical direction. Further, the upper end and the lower end of the overflow pipe 14a are opened upward and downward, respectively, so that the inside of the overflow pipe 14a communicates with the discharge port 18. Accordingly, when the cleaning water in the tank body 10 becomes higher than a predetermined water level, the cleaning water flows from the upper end opening of the overflow pipe 14a. And it drains from the discharge port 18 to the flush toilet through the overflow pipe 14a.
Further, the opening at the upper end of the overflow pipe 14a is provided in a position not including the opening range at the lower end of the gap forming portion 12c in the opening range in a top view. That is, the opening at the upper end of the overflow pipe 14a is provided at a position where the opening range does not overlap with the opening at the lower end of the gap forming portion 12c in the top view.

  An annular valve body 14b is connected to the outer periphery of the lower end portion of the overflow pipe 14a. The valve body 14b is a so-called sealing material, and the discharge port 18 is closed by the valve body 14b.

  One end (lower end) of the ball chain 14c is fixed to the central portion of the lower end of the overflow pipe 14a. Further, the ball chain 14c extends upward from the fixing portion with respect to the lower end central portion of the overflow pipe 14a through the overflow pipe 14a, and the other end (upper end) of the ball chain 14c is fixed to the operation device 16 described later. . That is, when the ball chain 14c is moved in the vertical direction, the overflow pipe 14a and the valve body 14b connected to the overflow pipe 14a move in the vertical direction as the ball chain 14c moves.

  The guide portion 14d is provided so as to stand from the bottom surface of the tank body 10 so as to cover the outer periphery of the overflow pipe 14a, and holds the overflow pipe 14a so as to be slidable in the vertical direction.

  The operating device 16 is provided in the upper part of the tank main body 10 so as to be hooked from the outside to the inside of the tank main body 10 and inserted in the lateral direction. A handle 16a is provided at one end of the operating device 16 located outside the tank body 10, and the other end of the ball chain 14c is connected to the other end of the operating device 16 located inside the tank body 10. It is fixed. By operating this handle 16a, the operating device 16 is driven to move the ball chain 14c, the overflow pipe 14a, and the valve body 14b in the vertical direction.

Furthermore, a motor (not shown) and a receiving unit (not shown) for receiving a command signal from a controller (not shown) provided outside the washing water tank device 1 are provided inside the operation device 16. Is provided. When a command signal is received from the controller, the motor is driven based on the command signal. By driving the motor, the ball chain 14c, the overflow pipe 14a, and the valve body 14b move in the vertical direction.
The “command signal from the controller” here is, for example, a signal from a human body detection sensor (not shown) that detects a human body (for example, a user) provided in a flush toilet or the like, or a flush toilet This is a signal or the like when a user operates a cleaning button (not shown) for instructing a cleaning operation.

<Configuration of the water receiver>
Below, with reference to FIGS. 6-8, the structure of the water receiving part which concerns on one Embodiment of this invention is demonstrated.

  FIG. 6 is a perspective view of a water receiver according to an embodiment of the present invention. FIG. 7 is a rear view of the water receiving part according to the embodiment of the present invention. 8 is a cross-sectional view taken along line VIII-VIII in FIG.

  As shown in FIGS. 6-8, the water receiving part 20 which receives the water discharged | emitted from the drain outlet 4b of the hand-washing bowl part 4 has a substantially box shape as a whole, and is formed long in the front-back direction in top view. Has been. The water receiver 20 is configured symmetrically.

  Further, the water receiving portion 20 has a bottom portion 22 and a peripheral wall portion 24 that is continuously formed so as to extend upward from the periphery of the bottom portion 22. Furthermore, the water receiving part 20 has the inflow port 26 opened toward upper direction, and the outflow port 28 opened toward back. That is, in the water receiving portion 20, a space having an upper side and a rear side opened is formed by the bottom portion 22 and the peripheral wall portion 24.

  On the upper side of the bottom portion 22, a bottom surface 22 a that receives water discharged from the drain port 4 b of the hand-washing bowl portion 4 is formed. The bottom surface 22a is inclined downward toward the outflow port 28 (from the front to the rear). The downstream end (rear end) of the bottom surface 22 a is connected to the outlet 28. That is, the rear end portion of the bottom surface 22 a forms a lower portion of the open end portion of the outflow port 28.

A peripheral wall portion 24 is formed on the front side, the left side, and the right side of the water receiving portion 20 so as to extend upward from the peripheral edge of the bottom portion 22. 28 is open. In other words, the peripheral wall portion 24 is not formed on the rear side of the water receiving portion 20.
An inner wall surface 24a, which is an inner surface of the water receiving portion 20 of the peripheral wall portion 24, is continuously formed on the bottom surface 22a so as to extend upward from the peripheral edge of the bottom surface 22a. The inner wall surface 24 a is formed in a curved shape that bulges from the inner side to the outer side of the water receiving portion 20. Thereby, the upper part of the inner wall surface 24 a overhangs toward the inner side of the water receiving part 20. The curved surface shape that bulges from the inner side to the outer side of the water receiving part 20 is formed over the entire inner wall surface 24a from the left and right rear ends of the inner wall surface 24a to the front side. Accordingly, in the peripheral wall portion 24, an arc-like shape that protrudes outward appears as the vertical cross-sectional shape of the inner wall surface 24a at any portion in the circumferential direction. Further, the angle formed by the bottom surface 22a and the peripheral wall portion 24 at the connecting portion between the bottom surface 22a and the peripheral wall portion 24 is greater than 90 ° and smaller than 180 °.
In addition, the inner side of the water receiving part 20 is a space side surrounded by the bottom part 22 and the peripheral wall part 24 of the water receiving part 20.

  The inflow port 26 is an opening provided on the upper surface of the water receiving portion 20, and allows water discharged from the drain port 4 b of the hand-washing bowl portion 4 to flow inside the water receiving portion 20. The inflow port 26 is provided at a position facing the bottom surface 22a. In addition, the inlet 26 is formed larger than the opening of the drain outlet 4b of the hand-washing bowl portion 4, and the water receiving portion 20 is provided so that the opening of the drain outlet 4b is accommodated in the opening of the inlet 26 in a top view. Has been placed.

  The outlet 28 is an opening provided on the rear side of the water receiver 20, and the water received by the water receiver 20, that is, the water flowing into the water receiver 20 from the inlet 26 is the tank body of the inner tank 8. 10 is discharged.

  Further, a protrusion 30 that protrudes from the inner wall surface 24a to the inside of the water receiving portion 20 is provided on the upper portion of the inner wall surface 24a. Specifically, the protrusion 30 is formed above the portion where the inner wall surface 24 a is overhanging and below the inflow port 26. In other words, the protrusion 30 is formed between the portion where the inner wall surface 24a is overhanging and the inflow port 26 in the vertical direction. The protrusion 30 protrudes horizontally from the inner wall surface 24 a and is provided on the entire inner periphery of the water receiver 20. Therefore, the angle formed by the protrusion 30 and the peripheral wall 24 at the connecting portion between the protrusion 30 and the peripheral wall 24 is greater than 90 ° and smaller than 180 °.

  Further, a tongue portion 32 that is continuously formed so as to extend from the bottom portion 22 toward the rear side is provided behind the water receiving portion 20. The tongue portion 32 is formed so as to extend rearward from the outflow port 28, and the surface 32 c of the rear end portion of the tongue portion 32 is formed on the cylindrical portion 12 b in a state where the water receiving portion 20 is fixed to the lid 12. It is in contact with the vertical surface 12e, which is the rear inner surface. For this reason, a gap is formed between the outlet 28 and the vertical surface 12e in a state where the water receiving portion 20 is fixed to the lid 12 (see FIG. 10). Further, the width t in the front-rear direction of the gap is formed smaller than the width T in the front-rear direction of the space formed by the gap forming portion 12c.

  On the upper surface of the tongue portion 32, a water guide surface 32a that guides the water flowing out from the outlet 28 to the downstream side is formed. An upstream end (front end) of the water guide surface 32 a is connected to the outlet 28. That is, the water guide surface 32a is formed continuously with the bottom surface 22a via the outflow port 28. Further, the water guide surface 32a is divided from the center in the left-right direction into the left side and the right side, and the right side water guide surface 32a is inclined downward toward the right rear side, and the left side water guide surface. 32a inclines downward diagonally to the left. In other words, the water guide surface 32a of the tongue portion 32 is inclined downward toward the inner space of the gap forming portion 12c on the left side or the right side. A ridge line inclined so as to descend from the front to the rear is formed at the left and right central positions of the tongue portion 32 by the right water guide surface 32a and the left water guide surface 32a.

  Engagement portions 32b extending downward are formed at the right rear end portion and the left rear end portion of the tongue portion 32. The engaging portion 32b engages with an engaged portion (not shown) provided in front of the lower portion in the cylindrical portion 12b, and water is supported by a support portion (not shown) provided in the lower portion in the cylindrical portion 12b. The water receiving part 20 is fixed to the lid 12 by supporting the receiving part 20 from below. In addition, when attaching the water receiving part 20 to the lid | cover 12, it inserts into the inside of the cylinder part 12b of the lid | cover 12 from the upper direction to the downward direction, and is fixed.

  As described above, the water receiving portion 20 has the bottom surface 22a that receives the water discharged from the drain port 4b of the hand-washing bowl portion 4, and the inner wall surface 24a formed so as to extend upward from the peripheral edge of the bottom surface 22a. And an outlet 28 for discharging the received water to the inner tank 8.

<Operation and action>
Next, with reference to FIGS. 9 and 10, the operation and action of the cleaning water tank apparatus according to one embodiment of the present invention will be described.

  FIG. 9 is an explanatory view schematically showing the flow of water in the water receiving part according to the embodiment of the present invention. 10 is a cross-sectional view taken along line XX of FIG.

First, an operation of the handle 16a by a user of a flush toilet (not shown) or a command signal from a controller (not shown) provided outside the flush water tank device 1 is received by the operation device 16 to operate the handle 16a. The device 16 is driven. When the operating device 16 is driven, the ball chain 14c is pulled up. As the ball chain 14c is pulled up, the overflow pipe 14a and the valve body 14b rise and the discharge port 18 opens. When the discharge port 18 is opened, the wash water stored in the tank body 10 of the inner tank 8 is discharged from the discharge port 18 and supplied to the flush toilet.
When drainage of the wash water stored in the tank body 10 of the inner tank 8 is completed and the discharge port 18 is closed by the valve body 14b, the water supply pipe (not shown) enters the tank body 10 of the inner tank 8. A predetermined amount of cleaning water is supplied.

Here, at the same time when the valve body 14b is pulled up and the discharge port 18 is opened, or after a predetermined time has elapsed after the discharge port 18 is opened, wash water is supplied from a water supply source (not shown) to the hand wash water discharge unit 2, Wash water for hand washing is discharged from the portion 2 toward the bowl surface 4 a of the hand washing bowl portion 4. The washing water discharged to the bowl surface 4a is discharged into the inner tank 8 from the drain port 4b.
The water supply source here may be a water supply pipe (not shown) for supplying a predetermined amount of cleaning water into the tank body 10 of the inner tank 8, or another pipe may be used.

As shown in FIGS. 9 and 10, the water discharged from the drain port 4 b flows into the water receiving part 20 from the inlet 26 of the water receiving part 20 through the inside of the cylindrical part 12 b of the lid 12. . And the water which flowed into the inside of the water receiving part 20 at the initial stage of the drainage from the drain outlet 4b collides with the bottom face 22a of the water receiving part 20.
At this time, since the bottom surface 22a of the water receiving portion 20 is inclined downward toward the outflow port 28 (rear side), the falling water from the drain port 4b of the hand washing bowl portion 4 can be removed from the bottom surface 22a of the water receiving portion 20. Can be received on an inclined surface. Thereby, the direction of water splashing from the bottom surface 22a can be set to the rear side direction, and water splashing upward can be performed as compared with the case where the falling water from the drain port 4b of the hand-washing bowl part 4 is received by a horizontal plane. Can be suppressed. Therefore, it is possible to reliably suppress the falling water from the hand-washing bowl portion 4 to the water receiving portion 20 from leaking from the inlet 26 to the outside of the inner tank 8.

The water that has collided with the bottom surface 22a of the water receiving portion 20 is scattered along the bottom surface 22a. The water that flows toward the rear side along the bottom surface 22 a flows as it is toward the outlet 28 and flows out of the water receiving portion 20 from the outlet 28. The water that flows outside the rear side flows upward along the inner wall surface 24a from the bottom surface 22a due to the momentum of the colliding water. Here, since the inner wall surface 24a is formed in a curved shape that bulges from the inner side to the outer side of the water receiving portion 20, the water flowing upward along the inner wall surface 24a protrudes outward from the lower side to the upper side. It rebounds to the inside of the water receiving part 20 so as to draw an arc. And the water which bounced inside the water receiving part 20 flows so that it may cover and cover the water which flowed in sequentially from the drain port 4b. The water returning to the inner side from the inner wall surface 24a is caught in the water flowing into the water receiving part 20 from the drain port 4b.
Further, a protrusion 30 that protrudes from the inner wall surface 24a to the inside of the water receiving portion 20 is provided on the upper portion of the inner wall surface 24a. Thereby, when the water flowing along the inner wall surface 24a rebounds toward the inner side of the water receiving portion 20, the vertical upward component of the water is weakened and the horizontal component is increased. That is, the water returning from the bottom surface 22 a of the water receiving portion 20 to the inside of the water receiving portion 20 along the inner wall surface 24 a flows from the inner wall surface 24 a along the protruding portion 30 and is prevented from flowing upward from the protruding portion 30. Is done. Accordingly, the water returned to the inner side of the water receiving part 20 is suppressed from flowing upwardly from the water receiving part 20, and the water receiving part receives water from the hand-washing bowl part 4 and flowing into the water receiving part 20 sequentially. The water returned to the inside of the part 20 can be covered more reliably. Therefore, it is possible to more reliably suppress the falling water from the hand-washing bowl portion 4 to the water receiving portion 20 from leaking from the inlet 26 to the outside of the inner tank 8. In addition, in FIG. 9, the flow of the water falling in the water receiving part 20 and the water in the water receiving part 20 are shown with the broken-line arrow.

  Thus, since the inner wall surface 24a of the water receiving portion 20 is formed in a curved shape that bulges toward the outside of the water receiving portion 20, it flows into the water receiving portion 20 from the drain port 4b of the hand-washing bowl portion 4. The water flows so as to return from the bottom surface 22a of the water receiving portion 20 to the inside of the water receiving portion 20 along the inner wall surface 24a. Thereby, scattering of the water which fell from the drain outlet 4b of the hand-washing bowl part 4 to the water receiving part 20 is suppressed. Therefore, it is possible to suppress the falling water from the hand-washing bowl portion 4 to the water receiving portion 20 from leaking to the outside of the inner tank 8.

  In addition, since the inner wall surface 24a of the water receiving portion 20 is formed in a curved shape that bulges toward the outside of the water receiving portion 20, the water receiving portion extends from the bottom surface 22a of the water receiving portion 20 along the inner wall surface 24a. The water that has returned to the inside of the cover 20 is covered with the water that has sequentially flowed from the hand-washing bowl section 4 to the water receiving section 20. Thereby, the scattering of the water which generate | occur | produces when the water which fell from the drain outlet 4b of the hand-washing bowl part 4 to the water receiving part 20 hits the water surface of the water collected in the water receiving part 20 is suppressed. Therefore, it is possible to suppress the falling water from the hand-washing bowl portion 4 to the water receiving portion 20 from leaking to the outside of the inner tank 8.

  Furthermore, the curved shape of the inner wall surface 24a that bulges from the inside to the outside of the water receiving portion 20 is that the entire inner wall surface 24a other than the entire rear surface portion where the outflow port 28 is provided. Is formed over. As a result, the water flowing down from the drain port 4b flows from the bottom surface 22a of the water receiving part 20 to the inside of the water receiving part 20 along the inner wall surface 24a regardless of where it falls. Therefore, scattering of water that has dropped from the drain port 4b of the hand-washing bowl portion 4 to the water receiving portion 20 can be further suppressed.

Then, the water bounced inward of the water receiver 20 flows toward the outlet 28 and flows out from the outlet 28 of the water receiver 20.
Here, since the bottom surface 22 a of the water receiver 20 is inclined downward toward the outlet 28, the remaining water in the water receiver 20 can be discharged to the inner tank 8. Therefore, the drainage performance in the water receiving part 20 can be improved.

The water that flows out from the outlet 28 of the water receiving portion 20 collides with the vertical surface 12e of the cylindrical portion 12b and is divided in the left-right direction. The water divided in the left-right direction is respectively guided to the right side or left side water guide surface 32a and flows toward the space formed by the gap forming portion 12c (see FIG. 10, broken line arrows). Then, the water that has flowed into the space formed by the gap forming portion 12c flows down as it is, and flows into the tank body 10 from the opening at the lower end of the gap forming portion 12c. At this time, the opening at the upper end of the overflow pipe 14a is provided at a position that does not overlap with the opening at the lower end of the gap forming portion 12c when viewed from above, so that the water flowing down from the opening at the lower end of the gap forming portion 12c Inflow into the overflow pipe 14 a communicating with the pipe 18 is suppressed. Therefore, the water for hand washing can be more reliably stored in the tank body 10 and the waste water can be prevented from flowing.
And when the predetermined time passes after the washing water for hand-washing is discharged from the hand-washing water discharging part 2, the water discharging from the hand-washing water discharging part 2 is complete | finished.

  According to the flush water tank device 1 according to the embodiment of the present invention, in the flush toilet equipped with the flush water tank device 1, the falling water from the hand wash bowl portion 4 to the water receiving portion 20 is outside the inner tank 8. It can suppress that water leaks.

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

  For example, although the hand-washing bowl part 4 and the outer tank 6 demonstrated the structure formed with ceramics, you may form with the resin material etc. Moreover, although the tank main body 10 of the inner tank 8 demonstrated the structure formed with a resin material, it should just have the function to store wash water inside, and may be formed with the other material.

  Moreover, although the water receiving part 20 demonstrated the structure provided in the lid | cover 12, you may be fixed to parts other than the lid | cover 12, for example, the tank main body 10 of the inner tank 8, etc. FIG. In that case, the lid 12 is not necessarily provided.

  Moreover, although the water receiving part 20 demonstrated the structure which can be attached or detached (separate body) with the lid | cover 12, you may be formed integrally with the lid | cover 12. As shown in FIG.

  Further, the curved shape of the inner wall surface 24a bulging from the inner side to the outer side of the water receiving portion 20 may not be formed over the entire inner wall surface 24a. For example, it may be formed only on the inner wall surface 24a near the position where the falling water from the drain port 4b collides with the bottom surface 22a.

  Further, the protrusion 30 may not be provided on the entire inner periphery of the water receiver 20. For example, you may form only in the upper part of the inner wall surface 24a in which the curved surface shape which bulges toward the outer side from the inner side of the water receiving part 20 is formed.

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

DESCRIPTION OF SYMBOLS 1 Washing water tank apparatus 2 Hand washing water discharging part 4 Hand washing bowl part 4a Bowl surface 4b Drain outlet 6 Outer tank 8 Inner tank 10 Tank main body 10a Opening part 12 Cover 12a Flat plate part 12b Cylindrical part 12c Gap formation part 12d Base part 12e Vertical surface 14 Drainage device 14a Overflow pipe 14b Valve element 14c Ball chain 14d Guide portion 16 Operating device 16a Handle 18 Drainage port 20 Water receiving portion 22 Bottom portion 22a Bottom surface 24 Peripheral wall portion 24a Inner wall surface 26 Inlet port 28 Outlet port 30 Projection portion 32 Tongue portion 32a Guide Water surface 32b Engagement part T, t width

Claims (4)

A washing water tank device for storing washing water for washing a toilet,
A hand-washing water discharger that discharges water;
A hand-washing bowl portion having a drain opening for receiving water discharged from the hand-washing water discharge portion and discharging the received water;
An outer tank provided below the hand-washing bowl,
An inner tank provided in the outer tank;
A bottom surface for receiving water discharged from the drain port, and an inner wall surface formed so as to extend upward from a peripheral edge of the bottom surface, and a water receiving portion provided at an upper portion of the inner tank, Prepared,
The washing water tank apparatus, wherein the inner wall surface of the water receiving portion is formed in a curved shape that bulges toward the outside of the water receiving portion. The washing water tank apparatus according to claim 1, wherein a protrusion projecting inward is provided on an upper portion of the inner wall surface of the water receiving portion. The water receiving portion has an outlet for discharging the received water to the inner tank,
The washing water tank apparatus according to claim 1, wherein the bottom surface of the water receiving portion is inclined downward toward the outlet.   A flush toilet provided with the flush water tank apparatus according to any one of claims 1 to 3.

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