JP7428968B2 - Wash water tank device and flush toilet device equipped with the same - Google Patents

Description

The present invention relates to a flush water tank device, and particularly to a flush water tank device that supplies flush water to a flush toilet, and a flush toilet device equipped with the flush water tank device.

Japanese Unexamined Patent Publication No. 2009-257061 (Patent Document 1) describes a low tank device. In this low tank device, a hydraulic cylinder device having a piston and a water drain portion is disposed inside a low tank provided with a drain valve, and the piston and the drain valve are connected by a connecting portion. Furthermore, when discharging the wash water in the low tank, the solenoid valve is opened to supply water to the hydraulic cylinder device and push up the piston. Since the piston is connected to the drain valve by the connecting portion, the movement of the piston pulls up the drain valve, opens the drain valve, and drains the wash water in the low tank. Note that the water supplied to the hydraulic cylinder device flows out from the water drain portion and flows into the low tank.

Furthermore, when closing the drain valve, the electromagnetic valve is closed to stop the supply of water to the hydraulic cylinder device. As a result, the piston that had been pushed up descends, and the drain valve returns to the closed position due to its own weight. At this time, the water in the hydraulic cylinder device flows out little by little from the water drain, so the piston slowly descends and the drain valve also slowly returns to the closed position. In addition, in the low tank device described in Patent Document 1, by adjusting the time that the solenoid valve is kept open, the time that the drain valve is open is changed, and the amount of water for washing, such as large washing and small washing, is changed. Achieves different types of cleaning.

JP2009-257061A

However, the low tank device described in Patent Document 1 has a problem in that it is difficult to accurately set the amount of cleaning water to be discharged. That is, in the low tank device described in Patent Document 1, after the solenoid valve is closed in order to close the drain valve, the water in the hydraulic cylinder device flows out little by little from the water drain part, so the downward movement of the piston is gradual. Therefore, it is difficult to set the opening time of the drain valve short. Further, since the descending speed of the piston depends on the flow rate of water flowing out from the water draining portion and the sliding resistance of the piston, there is a possibility of variation and a change over time. Therefore, in the low tank device described in Patent Document 1, it is difficult to accurately set the amount of wash water to be discharged.

Therefore, the present invention provides a cleaning water tank device that can precisely set the amount of cleaning water to be discharged while opening a drain valve using the water pressure of supplied water, and a cleaning water tank device equipped with the same. The purpose is to provide a flush toilet device.

In order to solve the above-mentioned problems, the present invention provides a flush water tank device for supplying flush water to a flush toilet, which stores flush water to be supplied to the flush toilet and also uses the stored flush water for flushing. It uses a water storage tank with a drain port for discharging water into the toilet bowl, a drain valve that opens and closes the drain port to supply and stop flushing water to the flush toilet bowl, and the water supply pressure of the supplied tap water. , the drain valve hydraulic drive unit that drives the drain valve, and the drain valve and the drain valve hydraulic drive unit are connected, and the drain valve is pulled up by the driving force of the drain valve hydraulic drive unit, and is disconnected at a predetermined timing to close the drain valve. a clutch mechanism for lowering the toilet bowl; a flushing water amount selection means capable of selecting a first flushing water volume for flushing the flush toilet bowl; and a flushing water volume selection means capable of selecting a second flushing water volume smaller than the first flushing water volume; a first float that is moved in accordance with the movement of the first float; and a first float that is movable in conjunction with the movement of the first float between an engagement position where the drain valve is engaged and held, and a non-engagement position where the drain valve is not engaged. A first float device including a mating member, a second float that is moved according to the water level in the water storage tank, and an engagement position that is interlocked with the movement of the second float and that engages with the drain valve and does not engage with the drain valve. a second engagement member movable to a non-engagement position; the first float moves the second engagement member to the non-engagement position at a height different from the height at which the first float moves the first engagement member to the non-engagement position; and a float drive mechanism that drives the first float and moves the first engaging member to a non-engaging position when the second amount of washing water is selected by the washing water amount selection means. and the drain valve engages with the second engagement member of the second float device when the first engagement member of the first float device is moved to a non-engagement position. .

In the present invention configured in this manner, flush water to be supplied to the flush toilet is stored in the water storage tank in which the drain port is formed. The drain valve water pressure drive unit drives the drain valve using the water supply pressure of the supplied tap water to supply and stop flush water to the flush toilet bowl. The clutch mechanism connects the drain valve and the drain valve hydraulic drive section, and uses the driving force of the drain valve hydraulic drive section to pull up the drain valve. Further, the clutch mechanism is disconnected at a predetermined timing, thereby lowering the drain valve. As the amount of flushing water for cleaning the flush toilet bowl, a first amount of flushing water and a second amount of flushing water smaller than the first amount of flushing water are selected by the flushing water amount selection means. Further, the first engagement member of the first float device is moved between an engagement position and a non-engagement position, and in the engagement position engages with and holds the drain valve. Additionally, the second engagement member of the second float device is configured to hold the drain valve at a different height than the first float device. The float drive mechanism drives the first float to move the first engagement member to a non-engagement position when the second amount of wash water is selected. As a result, the drain valve is engaged with the second engagement member of the second float device.

According to the present invention configured in this way, the drain valve and the drain valve hydraulic drive section are connected by the clutch mechanism and disconnected at a predetermined timing, so that the drain valve can be operated regardless of the operating speed of the drain valve hydraulic drive section. It becomes possible to move the drain valve and close the drain valve. Thereby, even if there is variation in the operating speed of the drain valve hydraulic drive unit when lowering the drain valve, it becomes possible to control the timing of closing the drain valve without being influenced by the variation. Further, since the float drive mechanism drives the first float to move the first engaging member to the non-engaging position, the first float device or the second float device is selectively operated according to the selected amount of washing water. can be done. Thereby, the first and second wash water amounts can be set while using the clutch mechanism.

In the present invention, preferably, the first float device is configured to hold the drain valve at a higher position than the second float device holds the drain valve, and the float drive mechanism is preferably configured to operate in conjunction with the second float. The first float is configured to move the first engagement member to the non-engagement position by driving the first float before the second engagement member is moved to the non-engagement position.

According to the present invention configured in this way, the first float device is configured to hold the drain valve at a higher position than the second float device, and the float drive mechanism drives the first float to 1. Move the engaging member to the non-engaging position. Therefore, when the float drive mechanism does not operate normally, the drain valve is held by the first float device, and the first amount of washing water that is larger than the second amount of washing water is discharged. As a result, even if the float drive mechanism malfunctions, the flush toilet can be flushed without running out of flushing water.

In the present invention, preferably, the clutch mechanism is configured to be disconnected at a position higher than the height at which the first engagement member of the first float device and the drain valve engage, and the float drive mechanism is preferably configured to The first float is driven to move the first engaging member to a non-engaging position before the drain valve is lowered to a height where the matching member and the drain valve engage.

According to the present invention configured in this way, the float drive mechanism moves the first engaging member to the disengaged position before the drain valve descends to a height at which the first engaging member and the drain valve engage. move it. Therefore, the drain valve separated by the clutch mechanism descends to the second float device and is held by the second float device without engaging the first float device. Thereby, when the second amount of wash water is selected, the drain valve can be held by the second float device more smoothly and reliably.

In the present invention, preferably, the clutch mechanism is configured to lift the drain valve from the drain port, and the float drive mechanism is configured to lift the drain valve to a height at which the drain valve engages with the first engaging member of the first float device. The first float is configured to be driven to move the first engagement member to a disengaged position before the first engagement member is engaged.

According to the present invention configured in this way, before the drain valve is pulled up to a height where the first engaging member of the first float device and the drain valve engage, the first engaging member is in the non-engaging position. will be moved to Therefore, even when the drain valve is pulled up from the drain port by the clutch mechanism, the drain valve and the first engaging member do not come into contact with each other, and the drain valve can be more reliably held by the second float device.

In the present invention, preferably, after the clutch mechanism is disengaged, the float drive mechanism operates until the drain valve is lowered below a height at which the drain valve engages with the first engaging member of the first float device. 1 engaging member is maintained in a non-engaging position.

According to the present invention configured in this way, the first engaging member of the first float device is disengaged until the drain valve descends below the height at which the first engaging member of the first float device and the drain valve engage. maintained in position. Therefore, after the clutch mechanism is disconnected, the drain valve can be lowered below the first float device without engaging with the first engaging member, and the drain valve can be moved smoothly and more reliably into the first position. It can be held by two float devices.

In the present invention, preferably, the float drive mechanism is configured to drive the first float using the supplied tap water.
According to the present invention configured in this way, the float drive mechanism drives the first float using the supplied tap water, so there is no need to separately provide a power source for driving the first float. A float drive mechanism can be activated.

The present invention also provides a flush toilet device having a plurality of flush modes with different amounts of flush water, which includes a flush toilet and a flush water tank device of the present invention that supplies flush water to the flush toilet. It is characterized by

According to the present invention, there is provided a flush water tank device that can precisely set the amount of flush water to be discharged while opening the drain valve using the drain valve hydraulic drive unit, and a flush toilet device equipped with the flush water tank device. can be provided.

1 is a perspective view showing an entire flush toilet device including a flush water tank device according to an embodiment of the present invention. 1 is a sectional view showing a schematic configuration of a wash water tank device according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing the configuration and operation of a clutch mechanism included in the wash water tank device according to the embodiment of the present invention. FIG. 2 is an enlarged view showing a drain valve, a first float device, and a second float device included in the wash water tank device according to the embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the cleaning water tank device in the large cleaning mode according to the embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the cleaning water tank device in the large cleaning mode according to the embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the cleaning water tank device in the large cleaning mode according to the embodiment of the present invention. FIG. 3 is a diagram showing the operation of the wash water tank device in the small wash mode according to the embodiment of the present invention. FIG. 3 is a diagram showing the operation of the wash water tank device in the small wash mode according to the embodiment of the present invention.

Next, a flush toilet device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an entire flush toilet device including a flush water tank device according to an embodiment of the present invention. FIG. 2 is a sectional view showing a schematic configuration of a wash water tank device according to an embodiment of the present invention.

As shown in FIG. 1, a flush toilet device 1 according to an embodiment of the present invention includes a flush toilet main body 2, which is a flush toilet, and a flush toilet according to an embodiment of the present invention, which is placed at the rear of the flush toilet main body 2. It is composed of a tank device 4. After using the flush toilet device 1 of this embodiment, the user operates the remote control device 6 attached to the wall surface, or a predetermined period of time elapses after the human sensor 8 provided on the toilet seat detects that the user leaves the seat. This allows the bowl portion 2a of the flush toilet main body 2 to be cleaned. The flush water tank device 4 according to the present embodiment discharges the flush water stored inside to the flush toilet main body 2 based on the instruction signal from the remote control device 6 or the human sensor 8, and uses the flush water to drain the bowl. 2a.

Further, the "large cleaning" or "small cleaning" for cleaning the bowl portion 2a is executed by the user pressing the push button 6a of the remote control device 6. Therefore, in the present embodiment, the remote control device 6 includes a flush water amount selection means that can select a first flush water volume for flushing the flush toilet main body 2 and a second flush water volume that is smaller than the first flush water volume. functions as In this embodiment, the human sensor 8 is provided on the toilet seat, but the present invention is not limited to this form. For example, it can be provided in the flush toilet main body 2 or the flush water tank device 4. Further, the human sensor 8 may be any sensor as long as it can detect the user's sitting, leaving, approaching, leaving, and waving a hand; for example, an infrared sensor or a microwave sensor may be used as the human sensor 8. Can be done.

As shown in FIG. 2, the flush water tank device 4 includes a water storage tank 10 that stores flush water to be supplied to the flush toilet main body 2, and a drain valve provided in the water storage tank 10 for opening and closing a drain port 10a. 12, and a drain valve hydraulic drive unit 14 that drives the drain valve 12. Further, the wash water tank device 4 includes inside thereof a water supply control valve 16 that controls water supply into the water supply tank 10 and the drain valve hydraulic drive unit 14 , and an electromagnetic valve 18 attached to the water supply control valve 16 . Furthermore, the cleaning water tank device 4 includes a control jetting section 20 that jets out cleaning water to control the amount of cleaning water, a cleaning water amount control valve 22 that supplies cleaning water to the controlling jetting section 20, and a cleaning water amount control valve 22 that supplies cleaning water to the controlling jetting section 20. It has a solenoid valve 24 attached to the water flow control valve 22 inside. The wash water tank device 4 also includes a first float device 26 for holding the raised drain valve 12 at the first position, and a first float device 26 for holding the drain valve 12 at a second position lower than the first position. a second float device 28 for Further, the wash water tank device 4 has a clutch mechanism 30, which connects the drain valve 12 and the drain valve hydraulic drive unit 14, and operates the drain valve 12 by the driving force of the drain valve hydraulic drive unit 14. Pull up.

The water storage tank 10 is a tank configured to store flush water to be supplied to the flush toilet main body 2, and a drain port 10a is formed at the bottom of the tank to discharge the stored flush water to the flush toilet main body 2. has been done. Further, in the water storage tank 10, an overflow pipe 10b is connected to the downstream side of the drain port 10a. This overflow pipe 10b rises vertically from the vicinity of the drain port 10a and extends above the cutoff water level WL of the wash water stored in the water storage tank 10. Therefore, the flush water flowing in from the upper end of the overflow pipe 10b bypasses the drain port 10a and flows directly into the flush toilet main body 2.

The drain valve 12 is a valve body arranged to open and close the drain port 10a, and is opened when the drain valve 12 is pulled upward, and the flush water in the water storage tank 10 is discharged to the flush toilet main body 2. Then, the bowl portion 2a is cleaned. Moreover, the drain valve 12 is pulled up by the driving force of the drain valve hydraulic drive unit 14, and when it is pulled up to a predetermined height, the clutch mechanism 30 is disconnected and the drain valve 12 is lowered by its own weight. When the drain valve 12 is lowered, the drain valve 12 is held for a predetermined time by the first float device 26 or the second float device 28, and the time until the drain valve 12 is seated in the drain port 10a is adjusted.

The drain valve water pressure drive unit 14 is configured to drive the drain valve 12 using the water supply pressure of wash water supplied from the water supply. Specifically, the drain valve hydraulic drive unit 14 includes a cylinder 14a into which water supplied from the water supply control valve 16 flows, a piston 14b slidably disposed within the cylinder 14a, and a piston 14b from the lower end of the cylinder 14a. and a rod 32 that protrudes and drives the drain valve 12.

Further, a spring 14c is arranged inside the cylinder 14a, and urges the piston 14b downward. Further, a packing 14e is attached to the piston 14b to ensure watertightness between the inner wall surface of the cylinder 14a and the piston 14b. Further, a clutch mechanism 30 is provided at the lower end of the rod 32, and the clutch mechanism 30 connects and disconnects the rod 32 and the valve shaft 12a of the drain valve 12.

The cylinder 14a is a cylindrical member that is arranged with its axis directed in the vertical direction, and slidably receives the piston 14b therein. Further, a drive unit water supply channel 34a is connected to the lower end of the cylinder 14a, so that water flowing out from the water supply control valve 16 flows into the cylinder 14a. Therefore, the piston 14b inside the cylinder 14a is pushed up against the urging force of the spring 14c by the water flowing into the cylinder 14a.

On the other hand, an outflow hole is provided in the upper part of the cylinder 14a, and the drive section drainage channel 34b communicates with the inside of the cylinder 14a via this outflow hole. Therefore, when water flows into the cylinder 14a from the drive section water supply channel 34a connected to the lower part of the cylinder 14a, the piston 14b is pushed upward from the lower part of the cylinder 14a, which is the first position. Then, when the piston 14b is pushed up to the second position above the outflow hole, the water that has flowed into the cylinder 14a flows out from the outflow hole through the drive section drainage path 34b. That is, the drive unit water supply channel 34a and the drive unit drainage channel 34b are communicated through the inside of the cylinder 14a when the piston 14b is moved to the second position. Further, a drainage channel branching portion 34c is provided at the distal end of the drive unit drainage channel 34b extending from the cylinder 14a. The drive unit drainage channel 34b that branches at the drainage channel branching portion 34c is configured such that one side of the drive unit drain channel 34b allows water to flow out into the water storage tank 10, and the other channel allows water to flow out into the overflow pipe 10b. Therefore, part of the water flowing out of the cylinder 14a is discharged into the flush toilet body 2 through the overflow pipe 10b, and the rest is stored in the water storage tank 10.

The rod 32 is a rod-shaped member connected to the lower surface of the piston 14b, and extends so as to protrude downward from inside the cylinder 14a through a through hole 14f formed in the bottom surface of the cylinder 14a. Further, a gap 14d is provided between the rod 32 protruding from below the cylinder 14a and the inner wall of the through hole 14f of the cylinder 14a, and a portion of the water that has flowed into the cylinder 14a flows out from this gap 14d. . The water flowing out from the gap 14d flows into the water storage tank 10. Note that this gap 14d is relatively narrow and has a large flow path resistance, so even if water flows out from the gap 14d, the pressure inside the cylinder 14a increases due to the water flowing into the cylinder 14a from the drive unit water supply channel 34a. However, the piston 14b is pushed up against the urging force of the spring 14c.

Next, the water supply control valve 16 is configured to control the water supply to the drain valve hydraulic drive unit 14 based on the operation of the electromagnetic valve 18, and to control the supply and stop of water to the water storage tank 10. That is, the water supply control valve 16 includes a main valve body 16a, a main valve port 16b that is opened and closed by the main valve body 16a, a pressure chamber 16c for moving the main valve body 16a, and a pressure chamber 16c for moving the main valve body 16a. It is provided with two pilot valves 16d and 16e for switching.

The main valve body 16a is configured to open and close the main valve port 16b of the water supply control valve 16, and when the main valve port 16b is opened, tap water supplied from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 14. flows into. The pressure chamber 16c is provided within the housing of the water supply control valve 16 adjacent to the main valve body 16a. A portion of the tap water supplied from the water supply pipe 38 flows into the pressure chamber 16c, and the pressure inside increases. When the pressure within the pressure chamber 16c increases, the main valve body 16a is moved toward the main valve port 16b, and the main valve port 16b is closed.

The pilot valves 16d and 16e are configured to open and close a pilot valve port (not shown) provided in the pressure chamber 16c. When a pilot valve port (not shown) is opened by the pilot valve, water in the pressure chamber 16c flows out and the internal pressure decreases. When the pressure in the pressure chamber 16c decreases, the main valve body 16a is removed from the main valve port 16b, and the water supply control valve 16 is opened. Since the pressure chamber 16c is provided with two pilot valves 16d and 16e, when both of these two pilot valves 16d and 16e are closed, the pressure in the pressure chamber 16c increases and the water supply control valve 16 is closed.

The pilot valve 16d is moved by a solenoid valve 18 attached to the pilot valve 16d to open and close a pilot valve port (not shown). The solenoid valve 18 is connected to a controller 40, and moves the pilot valve 16d based on a command signal from the controller 40. Specifically, the controller 40 receives signals from the remote control device 6 and the human sensor 8, and sends an electric signal to the solenoid valve 18 to operate it.

On the other hand, a float switch 42 is connected to the pilot valve 16e. The float switch 42 is configured to control the pilot valve 16e based on the water level in the water storage tank 10 to open and close a pilot valve port (not shown). That is, when the water level in the water storage tank 10 reaches a predetermined water level, the float switch 42 sends a signal to the pilot valve 16e to close the pilot valve port (not shown). That is, the float switch 42 is configured to set the water level in the water storage tank 10 to a predetermined water stop level WL. The float switch 42 is disposed within the water storage tank 10 and is configured to stop the water supply from the water supply control valve 16 to the drain valve water pressure drive unit 14 when the water level of the water storage tank 10 rises to the water stop level WL. There is.

Further, a vacuum breaker 36 is provided in the drive unit water supply channel 34a between the water supply control valve 16 and the drain valve hydraulic drive unit 14. This vacuum breaker 36 prevents water from flowing back to the water supply control valve 16 side when the pressure on the water supply control valve 16 side becomes negative.

Next, the wash water amount control valve 22 is configured to control water supply to the control spout 20 based on the operation of the electromagnetic valve 24 . The cleaning water flow rate control valve 22 is connected to the water supply pipe 38 via the water supply control valve 16, but regardless of whether the water supply control valve 16 is opened or closed, the tap water supplied from the water supply pipe 38 is always connected to the water supply pipe 38 via the water supply control valve 16. 22. Further, the wash water amount control valve 22 includes a main valve body 22a, a pressure chamber 22b, and a pilot valve 22c, and the pilot valve 22c is opened and closed by the electromagnetic valve 24. When the pilot valve 22c is opened by the solenoid valve 24, the main valve body 22a of the wash water amount control valve 22 is opened, and the tap water flowing in from the water supply pipe 38 is supplied to the control spout section 20, and the water storage tank 10 It is ejected inward and downward. Further, the solenoid valve 24 is connected to a controller 40, and moves the pilot valve 22c based on a command signal from the controller 40. Specifically, based on the operation of the remote control device 6, the controller 40 sends an electric signal to the solenoid valve 24 to operate it.

Further, a vacuum breaker 44 is provided in the pipeline between the wash water amount control valve 22 and the control jet section 20. This vacuum breaker 44 prevents water from flowing back to the wash water amount control valve 22 side when the pressure on the wash water amount control valve 22 side becomes negative.

In addition, water supplied from the water supply is passed through a water stop valve 38a placed outside the water storage tank 10 and a constant flow valve 38b placed inside the water storage tank 10 downstream of this water stop valve 38a. The water is supplied to the water supply control valve 16 and the wash water amount control valve 22, respectively. The stop valve 38a is provided to stop the supply of water to the wash water tank device 4 during maintenance or the like, and is normally used in an open state. The constant flow valve 38b is provided to allow water supplied from the water supply to flow into the water supply control valve 16 and the flush water flow control valve 22 at a predetermined flow rate, and is configured to allow water supplied from the water supply to flow at a constant flow rate regardless of the installation environment of the flush toilet device 1. configured to be supplied with water.

Next, the configuration and operation of the clutch mechanism 30 will be explained with new reference to FIG. 3.
FIG. 3 schematically shows the structure of the clutch mechanism 30, and also shows the operation when it is pulled up by the drain valve hydraulic drive unit 14.

First, as shown in column (a) of FIG. 3, the clutch mechanism 30 is provided at the lower end of a rod 32 extending downward from the drain valve hydraulic drive section 14, and is connected to the lower end of the rod 32 and the valve shaft 12a of the drain valve 12. It is configured to connect and disconnect the upper ends of the. The clutch mechanism 30 includes a rotating shaft 30a attached to the lower end of the rod 32, a hook member 30b supported by the rotating shaft 30a, and an engaging pawl 30c provided at the upper end of the valve shaft 12a.

The rotating shaft 30a is attached to the lower end of the rod 32 in a horizontal direction, and rotatably supports the hook member 30b. The hook member 30b is a plate-shaped member, and its middle portion is rotatably supported by the rotating shaft 30a. Further, the lower end of the hook member 30b is bent into a hook shape to form a hook portion. The engaging pawl 30c provided at the upper end of the valve shaft 12a of the drain valve 12 is a right triangular pawl. The bottom side of the engaging claw 30c is oriented substantially horizontally, and the side surface is formed to be inclined downward.

In the state shown in column (a) of FIG. 3, the drain valve 12 is seated at the drain port 10a, and the drain port 10a is closed. Further, in this state, the drain valve hydraulic drive unit 14 and the drain valve 12 are connected, and in this connected state, the hook portion of the hook member 30b is engaged with the bottom of the engaging claw 30c, and the drain valve 12 can be pulled up by rod 32.

Next, as shown in column (b) of FIG. 3, when cleaning water is supplied to the drain valve hydraulic drive unit 14, the piston 14b moves upward, and accordingly, the drain valve 12 is pulled up by the rod 32. . Furthermore, as shown in column (c) of FIG. 3, when the drain valve 12 is pulled up to a predetermined position, the upper end of the hook member 30b comes into contact with the bottom surface of the drain valve hydraulic drive unit 14, and the hook member 30b is moved to the rotating shaft 30a. It is rotated around. By this rotation, the hook portion at the lower end of the hook member 30b is moved in a direction away from the engagement claw 30c, and the engagement between the hook member 30b and the engagement claw 30c is released. When the hook member 30b and the engagement claw 30c are disengaged, the drain valve 12 drains the wash water stored in the water storage tank 10 to the drain port, as shown in column (d) of FIG. Descend toward 10a. (As will be described later, the lowered drain valve 12 is temporarily held at a predetermined height by the first float device 26 or the second float device 28 before sitting on the drain port 10a.)

Furthermore, as shown in column (e) of FIG. 3, when the wash water being supplied to the drain valve hydraulic drive unit 14 is stopped, the rod 32 is lowered by the biasing force of the spring 14c. When the rod 32 descends, the tip of the hook of the hook member 30b attached to the lower end of the rod 32 comes into contact with the engagement claw 30c, as shown in column (f) of FIG. When the rod 32 further descends, the hook portion of the hook member 30b is pushed by the inclined surface of the engagement claw 30c, and the hook member 30b is rotated, as shown in column (g) of FIG. When the rod 32 further descends, as shown in column (h) of FIG. 3, the hook portion of the hook member 30b climbs over the engagement claw 30c, and the hook member 30b is rotated to its original position by gravity, and the hook member 30b The hook portion of and the engaging claw 30c are engaged again, and the state shown in column (a) of FIG. 3 is restored.

Next, with new reference to FIG. 4, the configuration and operation of the first float device 26 and the second float device 28 will be described. FIG. 4 is an enlarged view of the drain valve 12, first float device 26, and second float device 28 in FIG. 2. The column (a) of FIG. 4 shows the state in which the drain valve 12 is closed, and the column (b) shows the state in which the drain valve 12 is opened and held by the first float device 26. It is shown.

As shown in FIG. 4, the first float device 26 includes a first float 26a and a first holding mechanism 46 that rotatably supports the first float 26a.
The first float 26a is a hollow rectangular parallelepiped member and is configured to receive buoyancy from the wash water stored in the water storage tank 10. Due to this buoyancy, when the water level in the water storage tank 10 is equal to or higher than the predetermined water level, the first float 26a is in the state shown by the solid line in column (a) of FIG. 4.

The first holding mechanism 46 is a mechanism that rotatably supports the first float 26a, and includes a support shaft 46a, an arm member 46b supported by the support shaft 46a, and a first engagement member 46c. The support shaft 46a is a rotation shaft fixed to the water storage tank 10 by an arbitrary member (not shown), and rotatably supports the arm member 46b and the first engagement member 46c. On the other hand, a holding claw 12b is formed at the base end of the valve shaft 12a of the drain valve 12 so as to be able to engage with the first engaging member 46c. This holding claw 12b is a right triangular protrusion that extends from the base end of the valve shaft 12a toward the first engaging member 46c, with its base oriented horizontally and its side surfaces inclined downward. It extends like that.

The support shaft 46a is a shaft extending in a direction perpendicular to the paper surface of FIG. 4, and its both ends are fixed to the water storage tank 10 by an arbitrary member (not shown), and the middle part is spaced away from the valve shaft 12a. It is formed in a curved manner. Further, the arm member 46b is a bent beam-like member, and the lower end portion thereof is configured to branch into two. The lower ends of these branched arm members 46b are rotatably supported at both ends of the support shaft 46a. Therefore, even when the drain valve 12 is moved in the vertical direction, the support shaft 46a and the arm member 46b do not interfere with the holding claw 12b provided on the valve shaft 12a of the drain valve 12.

On the other hand, the upper end portion of the arm member 46b is fixed to the bottom surface of the first float 26a. Therefore, when the first float 26a is under buoyancy, the first float 26a is held in the state shown by the solid line in column (a) of FIG. 4. Further, when the water level in the water storage tank 10 decreases, the first float 26a and the arm member 46b are rotated by their own weight around the support shaft 46a to the state shown by the imaginary line in column (a) of FIG. 4. Note that the rotation of the first float 26a and the arm member 46b is limited between the holding state of the first holding mechanism 46 shown by the solid line in column (a) of FIG. 4 and the non-holding state shown by the imaginary line. .

Further, the first engaging member 46c is a member rotatably attached to the support shaft 46a, and its base end portion is rotatably supported at both ends of the support shaft 46a. Further, the first engaging member 46c extends so that its tip portion curves toward the valve shaft 12a of the drain valve 12. Therefore, when the first float 26a is rotated to the position shown by the solid line in column (a) of FIG. 4, the first engagement member 46c is located at the engagement position. On the other hand, when the first float 26a is rotated to the position shown by the imaginary line in column (a) of FIG. 4, the first engaging member 46c is located at the non-engaging position.

Further, the first engaging member 46c is configured to be rotated about the support shaft 46a in conjunction with the arm member 46b. That is, when the first float 26a and the arm member 46b rotate from the state shown by the solid line in column (a) of FIG. 4 to the state shown by the imaginary line, the first engagement member 46c also rotates in conjunction with the arm member 46b. It is rotated from the engaged position shown by the solid line to the non-engaged position shown by the imaginary line. However, when the tip of the first engaging member 46c is pushed upward by the holding claw 12b of the drain valve 12 in the state shown by the solid line in column (a) of FIG. Only 46c is idle and can rotate. That is, when the tip of the first engaging member 46c is pushed upward by the holding claw 12b, the first engaging member 46c is held in the position shown by the solid line while the first float 26a and the arm member 46b are held in the position shown by the solid line. Only member 46c can pivot to the position shown in phantom in FIG.

On the other hand, as shown by the solid line in column (b) of FIG. 4, when the drain valve 12 is pulled upward and the holding claw 12b is located above the first engaging member 46c, The first engaging member 46c and the holding claw 12b engage with each other, preventing the drain valve 12 from lowering and holding the drain valve 12. That is, the first engaging member 46c constituting the first holding mechanism 46 engages with the drain valve 12 and holds the drain valve 12 at a predetermined height. Accordingly, the drain valve 12 is pulled up by the rod 32 (FIG. 3) connected to the drain valve hydraulic drive 14, and then, when the clutch mechanism 30 is disengaged, the drain valve 12 is lowered. During this descent, the holding claw 12b of the drain valve 12 engages with the first engaging member 46c in the engagement position, and the drain valve 12 is held at a predetermined height.

Next, when the water level in the water storage tank 10 decreases, the position of the first float 26a decreases, and the first float 26a and the arm member 46b rotate to the position shown by the imaginary line in column (b) of FIG. 4 (described later). In this state, the second float device 28 has also been rotated to the position shown in the imaginary line.) In conjunction with this rotation, the first engaging member 46c is also rotated to the non-engaging position shown in the imaginary line in column (b) of FIG. The connection is canceled. As a result, the drain valve 12 descends and seats on the drain port 10a, thereby closing the drain port 10a.

Further, as shown in column (a) of FIG. 4, a control ejection part 20 is provided above the first float 26a. The control spouting section 20 is a nozzle configured to spout cleaning water vertically downward toward the first float 26a, and has a spout 20a at its lower end that spouts the cleaning water. . Further, a cylindrical straight pipe section 20b is provided at the lower end of the control jet section 20, and communicates with the jet port 20a. The cleaning water spouted from the control jetting section 20 is prevented from being disturbed by flowing through the straight pipe section 20b having a constant cross-sectional area and a circular cross section. Note that when the water in the water storage tank 10 is stopped, the first float 26a and the tip of the control spout 20 are submerged in the wash water. Therefore, the cleaning water is ejected from the ejection port 20a of the submerged control ejection part 20 toward the submerged first float 26a.

Furthermore, the cleaning water spouted from the control spout 20 hits the upper surface 26b of the first float 26a facing the spout 20a, and acts to push down the first float 26a. Therefore, the upper surface 26b of the first float 26a functions as a water-receiving surface on which the cleaning water jetted from the control jetting section 20 hits. By spouting cleaning water from the control spouting part 20 and hitting the water receiving surface of the first float 26a, the first engaging member 46c of the first float device 26 is able to operate the first engaging member 46c as shown in FIG. is moved to the disengaged position shown in phantom lines. Therefore, the control ejection part 20 functions as a float drive mechanism that moves the first engagement member 46c to the non-engagement position. In addition, since the area of the spout 20a is smaller than the area of the upper surface 26b of the first float 26a, which is the water receiving surface, the kinetic energy of the water jetted from the spout 20a is not dissipated, and the upper surface 26b be accepted by

Further, a wall surface 26c is provided on the outer peripheral edge of the upper surface 26b of the first float 26a. This wall surface 26c is provided so as to surround the collision point P where the cleaning water jetted from the control jetting section 20 hits the upper surface 26b. This makes it difficult for the cleaning water that has hit the upper surface 26b of the first float 26a to escape from the upper surface 26b, making it possible to more effectively transmit the kinetic energy of the cleaning water to the upper surface 26b. Further, the collision point P where the cleaning water hits the upper surface 26b is located on the side away from the support shaft 46a with respect to the center line C of the first float 26a. In this way, the cleaning water jetted from the control jetting section 20 collides with the center line C of the first float 26a on the side that is spaced apart from the support shaft 46a, so the collision of the cleaning water acts. The moment of force around the support shaft 46a can be increased.

Next, the second float device 28 will be explained with reference to FIG.
As shown in FIG. 4, the second float device 28 includes a second float 28a and a second holding mechanism 48 that rotatably supports the second float 28a, and includes a valve shaft 12a of the drain valve 12. The first float device 26 is disposed on the opposite side of the first float device 26 .
The second float 28a is a hollow rectangular parallelepiped member and is configured to receive buoyancy from the wash water stored in the water storage tank 10. Due to this buoyancy, when the water level in the water storage tank 10 is equal to or higher than the predetermined water level, the second float 28a enters the holding state shown by the solid line in column (a) of FIG. 4.

The second holding mechanism 48 is a mechanism that rotatably supports the second float 28a, and includes a support shaft 48a, an arm member 48b supported by the support shaft 48a, and a second engagement member 48c. The configuration and operation of the second holding mechanism 48 are similar to those of the first holding mechanism 46, but the second engaging member 48c constituting the second holding mechanism 48 is provided on the valve shaft 12a of the drain valve 12. It is arranged so as to engage with the holding claw 12c. This holding claw 12c is also a right triangular protrusion similar to the holding claw 12b that is engaged with the first engaging member 46c of the first holding mechanism 46, and is attached to the valve shaft 12a of the drain valve 12 with the holding claw 12b. are formed at the same height. Further, when the second float 28a and the arm member 48b are in the state shown by the solid line in FIG. The mating member 48c is located at the non-engaging position.

Further, the support shaft 48a of the second holding mechanism 48 is arranged at a lower position than the support shaft 46a of the first holding mechanism 46. Therefore, the second float device 28 holds the drain valve 12 at a different position than the first float device 26 and at a lower position than the first float device 26 . Furthermore, since the arm member 48b of the second holding mechanism 48 is formed longer than the arm member 46b of the first holding mechanism 46, the second float 28a is supported at a higher position than the first float 26a. As a result, when the water level in the water storage tank 10 is decreasing, the second float 28a is rotated to the non-holding position shown by the imaginary line in FIG. 4 before the first float 26a. Ru.

Next, with new reference to FIGS. 5 to 9, the operation of the flush water tank device 4 according to the embodiment of the present invention and the flush toilet device 1 equipped with the same will be described.
First, in the toilet bowl flushing standby state shown in FIG. 2, the water level in the water storage tank 10 is at a predetermined water stop level WL, and in this state, both the water supply control valve 16 and the flushing water amount control valve 22 are closed. ing. Further, the first float device 26 and the second float device 28 are in the holding state shown by solid lines in column (a) of FIG. Next, when the user presses the deep cleaning button on the remote control device 6 (FIG. 1), the remote control device 6 transmits an instruction signal for executing the deep cleaning mode to the controller 40 (FIG. 2). Further, when the small wash button is pressed, an instruction signal for executing the small wash mode is transmitted to the controller 40. As described above, in the present embodiment, the flush toilet device 1 has two cleaning modes, a large flush mode and a small flush mode, which have different amounts of flush water, and the remote control device 6 functions as a flush water amount selection means for selecting the flush water amount. do.

In the flush toilet device 1 of the present embodiment, if a predetermined period of time has passed without pressing the flush button on the remote control device 6 after the human sensor 8 (FIG. 1) detects that the user has left the seat. Also, a toilet bowl cleaning instruction signal is sent to the controller 40. Further, if the time from when the user sits on the flush toilet device 1 to when the user leaves the seat is less than a predetermined time, the controller 40 determines that the user has urinated, and executes the small flush mode. do. On the other hand, if the time from sitting down to leaving the seat is longer than the predetermined time, the controller 40 executes the deep cleaning mode. Therefore, in this case, the controller 40 selects the large wash in which the first wash water amount is used for cleaning and the small wash in which the second wash water amount is smaller than the first wash water amount. 40 functions as a washing water amount selection means.

Next, the operation of the large cleaning mode will be explained with reference to FIGS. 5 to 7.
Upon receiving the instruction signal for deep cleaning, the controller 40 operates the solenoid valve 18 (FIG. 2) provided in the water supply control valve 16, and moves the pilot valve 16d on the solenoid valve side away from the pilot valve port. As a result, the pressure within the pressure chamber 16c decreases, the main valve body 16a is separated from the main valve port 16b, and the main valve port 16b is opened. Note that when large cleaning is selected, the cleaning water amount control valve 22 is always kept in a closed state, and no cleaning water is spouted from the control spouting section 20. That is, when large cleaning is selected, the first float 26a is not driven by the control jetting section 20, which is the float driving mechanism. When the water supply control valve 16 is opened, as shown in the upper part of FIG. 5, wash water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 14 via the water supply control valve 16. As a result, the piston 14b of the drain valve hydraulic drive unit 14 is pushed up, the drain valve 12 is pulled up via the rod 32, and the flush water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet main body 2.

When the drain valve 12 is pulled up, the holding claw 12c provided on the valve shaft 12a of the drain valve 12 pushes up and rotates the second engaging member 48c of the second holding mechanism 48, and the holding claw 12c engages the second engaging member 48c. It passes over member 48c. When the drain valve 12 is further pulled up, the holding claw 12b pushes up and rotates the first engaging member 46c of the first holding mechanism 46, and the holding claw 12b exceeds the first engaging member 46c ((a in FIG. 4). ) column → (b) column). Next, as shown in the lower part of FIG. 5, when the drain valve 12 is further pulled up, the clutch mechanism 30 is disconnected. That is, when the drain valve 12 reaches a predetermined height, the upper end of the hook member 30b of the clutch mechanism 30 hits the bottom surface of the drain valve hydraulic drive unit 14, and the clutch mechanism 30 is disconnected (see column (b) in FIG. 3). →(c) column).

When the clutch mechanism 30 is disengaged, the drain valve 12 begins to descend toward the drain port 10a due to its own weight. Here, immediately after the drain valve 12 is opened, the water level in the water storage tank 10 is high, so the first engagement member 46c of the first float device 26 and the second engagement member 48c of the second float device 28 are both in the engagement position shown by solid lines in column (b) of FIG. Therefore, the holding claw 12b of the drain valve 12 that has descended engages with the first engaging member 46c of the first holding mechanism 46, and the drain valve 12 is held at a predetermined height by the first float device 26. . By holding the drain valve 12 by the first float device 26, the drain port 10a is maintained in an open state, and the flush water in the water storage tank 10 is maintained to be discharged to the flush toilet main body 2.

Next, as shown in the upper part of FIG. 6, when the water level in the water storage tank 10 decreases, the float switch 42 that detects the water level in the water storage tank 10 is turned off. When the float switch 42 is turned off, the float switch side pilot valve 16e (FIG. 2) provided in the water supply control valve 16 is opened. On the other hand, when the pilot valve 16e is opened, the controller 40 operates the solenoid valve 18 and closes the pilot valve 16d on the solenoid valve side. As described above, the main valve body 16a of the water supply control valve 16 is configured to be closed when both the pilot valve 16e on the float switch side and the pilot valve 16d on the electromagnetic valve side are closed. . Therefore, even after the pilot valve 16d on the electromagnetic valve side is closed, the open state of the water supply control valve 16 is maintained, and water supply to the water storage tank 10 is continued.

In this embodiment, the pilot valve 16e is opened and closed based on the detection signal of the float switch 42, but as a modification, the pilot valve 16e may be opened and closed mechanically by a ball tap instead of the float switch 42. The present invention can also be configured as follows. In this modification, the pilot valve 16e is opened and closed in conjunction with a float that moves up and down according to the water level in the water storage tank 10. On the other hand, in this modification, the pilot valve 16d on the electromagnetic valve side is closed after the water level in the water storage tank 10 has decreased after the start of cleaning, and sufficient time has elapsed for the pilot valve 16e to be opened. Ru.

Further, as shown in the upper part of FIG. 6, when the water level in the water storage tank 10 decreases to a predetermined water level _WL2 , the position of the second float 28a supported by the second holding mechanism 48 decreases. As a result, the second engagement member 48c of the second float device 28 moves to the non-engagement position shown by the imaginary line in column (b) of FIG. On the other hand, since the first float 26a is supported at a lower position than the second float 28a, even in this state, the first engagement member 46c of the first float device 26 is maintained at the locking position, and the water storage tank The wash water in 10 continues to be drained.

When the water level in the water storage tank 10 further decreases to a predetermined water level WL ₁ lower than the predetermined water level WL ₂ , as shown in the lower part of FIG. The position also decreases. As a result, the first engaging member 46c of the first float device 26 also moves to the non-latching position shown by the imaginary line in column (b) of FIG. 12b is released. As the first engaging member 46c moves to the non-latching position, the drain valve 12 begins to descend again.

As a result, as shown in the upper part of FIG. 7, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. In this way, when the large flush mode is executed, the drain valve 12 is held until the water level in the water storage tank 10 drops from the water stop level WL to the predetermined water level _WL1 , and the first flush water amount is reduced to zero. It is discharged into the toilet bowl body 2.

On the other hand, since the float switch 42 is still in the OFF state, the water supply control valve 16 is maintained in the open state, and water supply to the water storage tank 10 is continued. The wash water supplied to the water storage tank 10 passes through the drain valve hydraulic drive unit 14 and reaches the drain branch part 34c (FIG. 2), and a part of the wash water branched at the drain branch part 34c flows into the overflow pipe 10b. The remaining water is stored in the water storage tank 10. The flushing water that has flowed into the overflow pipe 10b flows into the flush toilet main body 2 and is used to refill the bowl portion 2a. When the wash water flows into the water storage tank 10 with the drain valve 12 closed, the water level in the water storage tank 10 rises.

As shown in the lower part of FIG. 7, when the water level in the water storage tank 10 rises to a predetermined water stop level WL, the float switch 42 is turned on. When the float switch 42 is turned on, the pilot valve 16e (FIG. 2) on the float switch side is closed. As a result, both the pilot valve 16e on the float switch side and the pilot valve 16d on the electromagnetic valve side are closed, so the pressure in the pressure chamber 16c increases and the main valve body 16a of the water supply control valve 16 closes. The valve will be closed and the water supply will be cut off. When the water supply to the drain valve hydraulic drive unit 14 is stopped, the piston 14b of the drain valve hydraulic drive unit 14 is pushed down by the biasing force of the spring 14c, and the rod 32 is lowered together with this. As a result, the clutch mechanism 30 is connected (columns (e) to (h) in FIG. 3), and the toilet returns to the standby state before toilet flushing is started.

Next, the operation of the small cleaning mode will be explained with reference to FIGS. 8 and 9.
When the controller 40 receives an instruction signal to perform a small wash, the controller 40 operates the solenoid valve 18 provided in the water supply control valve 16 to open the water supply control valve 16 . Further, the controller 40 operates the electromagnetic valve 24 (FIG. 2) provided in the wash water amount control valve 22 to open the wash water amount control valve 22 as well. When the water supply control valve 16 is opened, as shown in the upper part of FIG. 8, wash water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 14 via the water supply control valve 16. As a result, the piston 14b of the drain valve hydraulic drive unit 14 is pushed up, the drain valve 12 is pulled up via the rod 32, and the flush water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet main body 2. Note that when the drain valve 12 is pulled up, the holding claw 12c (column (a) in FIG. 4) provided on the valve shaft 12a of the drain valve 12 pushes up the second engaging member 48c of the second holding mechanism 48 and rotates. By moving the holding claw 12c, the holding claw 12c passes over the second engaging member 48c.

Furthermore, when the wash water amount control valve 22 is opened, the wash water that has flowed in from the water supply pipe 38 passes through the wash water amount control valve 22 and is ejected downward from the control spout section 20 . Note that the tip (lower end) of the control spout 20 is located below the water stop level WL of the water storage tank 10, so the control spout 20 drains cleaning water from the submerged spout 20a (FIG. 4). gush. The cleaning water spouted from the spout 20a hits the upper surface 26b of the first float 26a, which is a water receiving surface, and is arranged to face the spout 20a, thereby driving the first float 26a downward. Therefore, while cleaning water is being spouted from the spout 20a of the control spout 20, regardless of the water level in the water storage tank 10, the first float 26a is It will be pushed down to the position shown. In this way, the control jetting section 20, which is a float driving mechanism, drives the first float 26a using the supplied tap water.

That is, as shown in the upper part of FIG. 8, the first engaging member 46c of the first float device 26 is disengaged by the cleaning water jetted from the control jetting section 20, regardless of the water level in the water storage tank 10. moved to position. Note that before the drain valve 12 is pulled up to a height where the first engaging member 46c of the first float device 26 and the holding claw 12b of the drain valve 12 engage, the water is The first float 26a is driven, and the first engagement member 46c is moved to the non-engagement position.

Next, as shown in the lower part of FIG. 8, when the drain valve 12 is pulled up to a predetermined position, the clutch mechanism 30 is disconnected. That is, the clutch mechanism 30 is disconnected at a position higher than the height at which the first engaging member 46c of the first float device 26 and the drain valve 12 engage. Further, as described above, the first float 26a has already been moved (pressed down) by the cleaning water ejected from the control ejection part 20, and the first engagement member 46c and the holding claw 12b of the drain valve 12 are Before the drain valve 12 is lowered to the engagement height, the first engagement member 46c has been moved to the non-engagement position.

When the clutch mechanism 30 is disengaged, the drain valve 12 begins to descend toward the drain port 10a due to its own weight. Here, immediately after the drain valve 12 is opened, the water level in the water storage tank 10 is high, so the second engagement member 48c of the second float device 28 is engaged as shown by the solid line in column (b) of FIG. It is in the correct position. On the other hand, as described above, the first engaging member 46c of the first float device 26 is moved to the non-engaging position shown by the imaginary line in column (b) of FIG. was moved and remains in that state. In other words, after the clutch mechanism 30 is disconnected, until the drain valve 12 is lowered below the height at which the first engaging member 46c of the first float device 26 and the holding claw 12b of the drain valve 12 engage, The first engaging member 46c is maintained in the non-engaging position by the jetting of the cleaning water from the control jetting section 20. Therefore, the holding claw 12c of the drain valve 12 that has descended engages with the second engaging member 48c of the second holding mechanism 48, and the drain valve 12 is held at a predetermined height by the second holding mechanism 48. .

Here, when the drain valve 12 is held by the second holding mechanism 48, it is held at a lower position than when it is held by the first holding mechanism 46. By holding the drain valve 12 by the second holding mechanism 48, the drain port 10a is maintained in an open state, and the flush water in the water storage tank 10 is maintained to be discharged into the flush toilet main body 2. The controller 40 also controls the electromagnetic valve 24 (FIG. 2) at a predetermined timing after the drain valve 12 is lowered and the holding claw 12b of the drain valve 12 passes the first engagement member 46c of the first holding mechanism 46. A signal is sent to close the wash water amount control valve 22. As a result, the ejection of cleaning water from the control ejection section 20 is stopped.

Next, as shown in the upper part of FIG. 9, when the water level in the water storage tank 10 decreases, the float switch 42 that detects the water level in the water storage tank 10 is turned off. When the float switch 42 is turned off, the float switch side pilot valve 16e (FIG. 2) provided in the water supply control valve 16 is opened. On the other hand, when the pilot valve 16e is opened, the controller 40 operates the solenoid valve 18 and closes the pilot valve 16d on the solenoid valve side. Thereby, even after the pilot valve 16d on the electromagnetic valve side is closed, the open state of the water supply control valve 16 is maintained, and water supply to the water storage tank 10 is continued.

Further, as shown in the upper part of FIG. 9, when the water level in the water storage tank 10 decreases, the position of the second float 28a supported by the second holding mechanism 48 decreases. As a result, the second engagement member 48c of the second float device 28 moves to the non-engagement position shown by the imaginary line in column (b) of FIG. As a result, the engagement between the second engagement member 48c and the holding claw 12c of the drain valve 12 is released. In other words, before the second engaging member 48c is moved to the non-engaging position in conjunction with the second float 28a, the first float 26a is driven by the cleaning water jetted from the control jetting section 20, The first engaging member 46c has been moved to the non-engaging position. Therefore, the drain valve 12 does not engage with the first engagement member 46c, but engages with the second engagement member 48c located below it. Next, the second engaging member 48c of the second float device 28 moves to the non-engaging position, so that the drain valve 12 begins to descend again.

Next, as shown in the lower part of FIG. 9, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. In this manner, when the small wash mode is executed, the drain valve 12 is held until the water level in the water storage tank 10 falls from the water stop level WL to the predetermined water level _WL2 , and the second wash water amount is reduced to It is discharged into the toilet bowl body 2. Here, in the deep cleaning mode, the drain valve 12 was held until the water level in the water storage tank 10 decreased to a predetermined water level WL ₁ lower than the predetermined water level WL ₂ . Therefore, the amount of second wash water discharged from the water storage tank 10 in the small wash mode is smaller than the first amount of wash water discharged in the large wash mode. In other words, in the small cleaning mode, the control jetting section 20 applies cleaning water to the first float 26a, so that the first holding mechanism 46 is brought into the non-holding state, and the drain valve 12 is held in the non-holding state by the first holding mechanism 46. It is held by the second holding mechanism 48 without being held. As a result, in the small washing mode, the drain valve 12 is lowered earlier than in the large washing mode, and the amount of washing water is reduced.

On the other hand, in the state shown in the lower part of FIG. 9, the float switch 42 is still in the OFF state, so the water supply control valve 16 is maintained in the open state, and water supply to the water storage tank 10 is continued. When the wash water flows into the water storage tank 10 with the drain valve 12 closed, the water level in the water storage tank 10 rises.

Furthermore, when the water level in the water storage tank 10 rises to a predetermined water stop level WL, the float switch 42 is turned on and the pilot valve 16e (FIG. 2) on the float switch side is closed. As a result, both the pilot valve 16e on the float switch side and the pilot valve 16d on the electromagnetic valve side are closed, so the main valve body 16a of the water supply control valve 16 is closed and water supply is stopped. When the water supply to the drain valve hydraulic drive unit 14 is stopped, the piston 14b of the drain valve hydraulic drive unit 14 is pushed down, and the rod 32 is lowered together with this. As a result, the clutch mechanism 30 is connected (columns (e) to (h) in FIG. 3), returns to the standby state before toilet flushing starts (returns to the state in the lower row of FIG. 7), and the small Exit cleaning mode.

According to the wash water tank device 4 of the embodiment of the present invention, the drain valve 12 and the drain valve hydraulic drive section 14 are connected by the clutch mechanism 30 and disconnected at a predetermined timing (FIG. 3), so that the drain valve hydraulic drive It becomes possible to move the drain valve 12 regardless of the operating speed of the section 14, and the drain valve 12 can be closed. Moreover, since the control jetting part 20, which is a float drive mechanism, drives the first float 26a to move the first engagement member 46c to the non-engagement position, the first float device 26 is adjusted according to the selected amount of washing water. (for large washes) or the second float device 28 (for small washes) can be selectively activated. Thereby, the first and second wash water amounts can be set while using the clutch mechanism 30.

Further, according to the wash water tank device 4 of the present embodiment, the first float device 26 is configured to hold the drain valve 12 at a higher position than the second float device 28 (FIG. 4), and the control jet The section 20 drives the first float 26a to move the first engaging member to the non-engaging position (upper part of FIG. 8). Therefore, if the control jetting part 20 does not operate normally and the first float 26a cannot be pushed down, the drain valve 12 is held by the first float device 26 as in the case of deep cleaning (see FIG. 6). top). As a result, if the control jetting section 20 does not operate normally, the first amount of cleaning water that is greater than the second amount of cleaning water is discharged. As a result, even if the control spout 20 malfunctions, the flush toilet main body 2 will not run out of flushing water, and the flush toilet main body 2 can be reliably cleaned.

Furthermore, according to the cleaning water tank device 4 of the present embodiment, the cleaning water from the control spout 20 is released before the drain valve 12 descends to the height where the first engaging member 46c and the drain valve 12 engage. , moves the first engaging member 46c to the non-engaging position (upper row of FIG. 8). Therefore, the drain valve 12 disconnected by the clutch mechanism 30 descends to the second float device 28 without engaging the first float device 26 and is held by the second float device 28 (see FIG. 8). bottom). Thereby, when the second amount of washing water is selected, the drain valve 12 can be smoothly and reliably held by the second float device 28.

Moreover, according to the wash water tank device 4 of the present embodiment, before the drain valve 12 is raised to a height at which the first engaging member 46c of the first float device 26 and the drain valve 12 engage, The mating member 46c is moved to the non-engaging position (upper row in FIG. 8). Therefore, even when the drain valve 12 is pulled up from the drain port 10a by the clutch mechanism 30, the drain valve 12 and the first engaging member 46c do not come into contact with each other, and the drain valve 12 is more reliably pulled up by the second float device 28. can be retained.

Furthermore, according to the wash water tank device 4 of the present embodiment, the first engagement member 46c of the first float device 26 and the drain valve 12 are moved downward until the drain valve 12 is lowered below the height at which the first engaging member 46c of the first float device 26 and the drain valve 12 engage with each other. The engaging member 46c is maintained in the non-engaging position (lower row in FIG. 8). Therefore, after the clutch mechanism 30 is disconnected, the drain valve 12 can descend below the first float device 26 without engaging the first engaging member 46c, allowing smooth and reliable draining. The valve can be carried by a second float device 28.

Further, according to the cleaning water tank device 4 of the present embodiment, the control jet unit 20, which is a float drive mechanism, drives the first float 26a using the supplied tap water. It can be operated as a float drive mechanism without separately providing a power source for driving.

Although the embodiments of the present invention have been described above, various changes can be made to the embodiments described above.
Here, in the embodiment described above, the first float device 26 and the second float device 28 are provided, and when the small cleaning mode is executed, the control jetting part 20 cleans toward the first float 26a. Water was ejected to forcibly move the first engagement member 46c of the first float device 26 to the non-engagement position. On the other hand, as a first modification, a float driving member such as a piston, which is driven by the pressure of the supplied cleaning water, is provided above the first float 26a, and a rod is attached to the piston. The present invention can also be configured such that the first float 26a is pushed down by this rod.

That is, when the small cleaning mode is executed, the float driving piston is moved, thereby pushing down the first float 26a via the rod and forcibly moving the first engaging member 46c to the non-engaging position. let As a result, the clutch mechanism 30 is disconnected, and the holding claw 12b of the descending drain valve 12 does not engage with the first engaging member 46c of the first float device 26, and the holding claw 12c and the second engaging member 46c of the second float device 28 do not engage with each other. The second engaging member 48c engages. On the other hand, when the large cleaning mode is executed, the holding claw 12b of the drain valve 12 is engaged with the first engaging member 46c of the first float device 26 without moving the float driving piston. Thereby, when the small cleaning mode is selected, the amount of cleaning water is set by the second float device 28, and when the large cleaning mode is selected, the amount of cleaning water is set by the first float device 26. In this modification, a float-driving piston and a rod attached to the piston function as a float-driving mechanism.

Furthermore, as a second modification, a water weight may be used instead of the float-driving piston in the first modification. That is, a small vertically movable tank is arranged in the water storage tank 10, and a rod extending downward is provided on the bottom of this small tank. Further, the lower end of the rod extending from the small tank is brought into contact with the upper surface of the first float 26a.

When the small washing mode is selected, washing water is flowed into a small tank and used as a water weight, and the weight of this water weight forcibly pushes down the first float 26a, so that the first float 26a of the first float device 26 is 1. The engaging member 46c is moved to the non-engaging position. As a result, the clutch mechanism 30 is disconnected, and the holding claw 12b of the descending drain valve 12 does not engage with the first engaging member 46c of the first float device 26, and the holding claw 12c and the second engaging member 46c of the second float device 28 do not engage with each other. The second engaging member 48c engages. Note that a small hole is provided at the bottom of the small tank so that all of the washing water in the small tank flows out after a predetermined period of time has elapsed. On the other hand, when the large cleaning mode is executed, the holding claw 12b of the drain valve 12 is engaged with the first engaging member 46c of the first float device 26 without allowing the cleaning water to flow into the small tank. Thereby, when the small cleaning mode is selected, the amount of cleaning water is set by the second float device 28, and when the large cleaning mode is selected, the amount of cleaning water is set by the first float device 26. In this variation, a small tank and a rod attached to it function as a float drive mechanism.

Furthermore, as a third modification, instead of the float-driving piston in the first modification, a small tank and a third float receiving buoyancy within the tank may be used. That is, a small tank is fixed in the water storage tank 10, and a third float movable in the vertical direction is arranged in the small tank. Further, a link mechanism is connected to the third float, and the link mechanism is configured so that when the third float floats up in the small tank, the first float 26a is pushed down.

When the small wash mode is selected, wash water flows into the small tank to float the third float, and this buoyancy forces the first float 26a down via the link mechanism, causing the third float to float. 1. The first engaging member 46c of the float device 26 is moved to the non-engaging position. As a result, the clutch mechanism 30 is disconnected, and the holding claw 12b of the descending drain valve 12 does not engage with the first engaging member 46c of the first float device 26, and the holding claw 12c and the second engaging member 46c of the second float device 28 do not engage with each other. The second engaging member 48c engages. A small hole is provided in the lower part of the small tank, so that after a predetermined period of time, all the wash water in the small tank flows out and the third float is lowered. On the other hand, when the large cleaning mode is executed, the holding claw 12b of the drain valve 12 is engaged with the first engaging member 46c of the first float device 26 without allowing the cleaning water to flow into the small tank. Thereby, when the small cleaning mode is selected, the amount of cleaning water is set by the second float device 28, and when the large cleaning mode is selected, the amount of cleaning water is set by the first float device 26. In this modification, a small tank, a third float, and a link mechanism connected thereto function as a float drive mechanism.

1 Flush toilet device 2 Flush toilet body (flush toilet)
2a Bowl part 4 Washing water tank device 6 Remote control device (washing water amount selection means)
6a Push button 8 Human sensor 10 Water storage tank 10a Drain port 10b Overflow pipe 12 Drain valve 12a Valve shaft 12b Holding claw 12c Holding claw 14 Drain valve hydraulic drive unit 14a Cylinder 14b Piston 14c Spring 14d Gap 14e Packing 14f Through hole 16 Water supply control Valve 16a Main valve body 16b Main valve port 16c Pressure chamber 16d Pilot valve 16e Pilot valve 18 Solenoid valve 20 Control jet (float drive mechanism)
20a Spout 20b Straight pipe section 22 Cleaning water flow control valve 22a Main valve body 22b Pressure chamber 22c Pilot valve 24 Solenoid valve 26 First float device 26a First float 26b Top surface (water receiving surface)
28 Second float device 28a Second float 30 Clutch mechanism 30a Rotating shaft 30b Hook member 30c Engagement pawl 32 Rod 34a Drive section water supply channel 34b Drive section drain channel 34c Drain channel branch section 36 Vacuum breaker 38 Water supply pipe 38a Water stop valve 40 Controller (washing water amount selection means)
42 Float switch 44 Vacuum breaker 46 First holding mechanism 46a Support shaft 46b Arm member 46c First engaging member 48 Second holding mechanism 48a Support shaft 48b Arm member 48c Second engaging member

Claims (7)

A flush water tank device that supplies flush water to a flush toilet,
a water storage tank that stores flush water to be supplied to the flush toilet and is formed with a drain port for discharging the stored flush water to the flush toilet;
a drain valve that opens and closes the drain port and supplies and stops flushing water to the flush toilet;
a drain valve hydraulic drive unit that drives the drain valve using the water supply pressure of the supplied tap water;
a clutch mechanism that connects the drain valve and the drain valve hydraulic drive unit to pull up the drain valve by the driving force of the drain valve hydraulic drive unit, and is disconnected at a predetermined timing to lower the drain valve;
a flushing water amount selection means capable of selecting a first flushing water volume for flushing the flush toilet bowl and a second flushing water volume that is smaller than the first flushing water volume;
a first float that is moved according to the water level in the water storage tank; and an engaged position that is linked to the movement of the first float and that engages with the drain valve and holds the drain valve; and a non-engaged position that does not engage. a first float device including a first engagement member movable to a mating position;
a second float that is moved according to the water level in the water storage tank; and a second float that is movable in conjunction with the movement of the second float between an engaged position where it engages with the drain valve and a non-engaged position where it does not engage with the drain valve. a second float that moves the second engagement member to the disengaged position at a height different from a height at which the first float moves the first engagement member to the disengaged position; a device;
a float drive mechanism that drives the first float to move the first engaging member to a non-engaging position when the second washing water amount is selected by the washing water amount selection means;
The water level in the water storage tank at which the second engaging member of the second float device is moved to the non-engaging position in conjunction with the movement of the second float is determined by the first engaging member of the first float device. a mating member is set higher than a water level in the water storage tank that is moved to a non-engaging position in conjunction with movement of the first float;
Cleaning characterized in that when the first engaging member of the first float device is moved to a non-engaging position, the drain valve engages with the second engaging member of the second float device. Water tank equipment. The first float device is configured to hold the drain valve at a higher position than the second float device holds the drain valve, and the float drive mechanism is configured to operate in conjunction with the second float. Claim 1: The first float is driven to move the first engagement member to the non-engagement position before the second engagement member is moved to the non-engagement position. Wash water tank device as described. The clutch mechanism is configured to be disconnected at a position higher than a height at which the first engagement member of the first float device and the drain valve engage, and the float drive mechanism is configured to disengage the first engagement member of the first float device and the drain valve. The first float is driven to move the first engagement member to a disengaged position before the drain valve is lowered to a height at which the member and the drain valve engage. The washing water tank device according to item 2. The clutch mechanism is configured to pull up the drain valve from the drain port, and the float drive mechanism is configured to raise the drain valve to a height at which the first engaging member of the first float device and the drain valve engage. The wash water tank device according to claim 3, wherein the first float is driven to move the first engaging member to a non-engaging position before being raised. After the clutch mechanism is disconnected, the float drive mechanism operates the first engagement member of the first float device until the drain valve is lowered below a height at which the first engaging member of the first float device engages with the drain valve. 5. The cleaning water tank device according to claim 4, wherein the cleaning water tank device is configured to maintain one engaging member in a non-engaging position. The wash water tank device according to any one of claims 1 to 5, wherein the float drive mechanism is configured to drive the first float using supplied tap water. A flush toilet device equipped with multiple flushing modes with different amounts of flushing water,
flush toilet and
The flush water tank device according to any one of claims 1 to 6, which supplies flush water to the flush toilet bowl;
A flush toilet device characterized by having the following.

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