JP7350231B2 - 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. , a drain valve hydraulic drive unit that drives the drain valve, and 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 engages with the drain valve. Accordingly, the drain valve holding mechanism includes an engaging member that prevents the drain valve from lowering due to its own weight for a predetermined period, a first flushing water amount for flushing the flush toilet, and a second flushing water amount smaller than the first flushing water amount. The valve control water pressure drive has a washing water amount selection means that can select the amount of washing water, and a valve control water pressure drive section that operates based on the supply pressure of the supplied tap water and controls the timing at which the drain valve descends. When the second wash water amount is selected by the wash water amount selection means, the part applies an operating force to the drain valve holding mechanism to drive the engagement member of the drain valve holding mechanism to increase the first wash water amount. The feature is that the drain valve is lowered earlier than in the selected case.

According to the present invention configured as described above, since the clutch mechanism is provided that connects the drain valve and the drain valve hydraulic drive section, the operation of the drain valve hydraulic drive section is affected by releasing the connection by the clutch mechanism. The drain valve can be lowered without being affected. Thereby, even if there is variation in the operating speed of the drain valve hydraulic drive unit when lowering the drain valve, it is possible to accurately control the timing of closing the drain valve.

Further, a valve control hydraulic drive unit is provided that drives the engaging member of the drain valve holding mechanism by applying an operating force to the drain valve holding mechanism. As a result, when the second wash water amount is selected, the timing at which the drain valve descends can be made earlier than when the first wash water amount is selected, so it is possible to select multiple wash water amounts for washing. becomes possible.

In the present invention, preferably, the drain valve hydraulic drive unit includes a cylinder into which tap water flows, a piston disposed within the cylinder and slid by the water supply pressure of the tap water flowing into the cylinder, and a piston connected to the piston. and a first rod member that protrudes and extends from a through hole formed in the cylinder and that is connected to a drain valve to drive the drain valve, and the valve control hydraulic drive unit has a pressure chamber into which tap water flows; , a drive part driven by the water supply pressure of tap water flowing into the pressure chamber, and a second rod member driven by the drive part to apply an operating force to the drain valve holding mechanism, and the volume of the pressure chamber is: smaller than the volume of the cylinder.
According to the present invention configured in this way, since the volume of the pressure chamber provided in the valve control hydraulic drive unit is smaller than the volume of the cylinder provided in the drain valve hydraulic drive unit, if the volume is larger than the cylinder volume. The second rod member can be driven by only supplying a small amount of tap water compared to the above, and the responsiveness of the valve control hydraulic drive section can be improved.

In the present invention, preferably, the valve control hydraulic drive section causes the second rod member to protrude toward the drain valve holding mechanism based on the water supply pressure of tap water flowing into the pressure chamber.
According to the present invention configured in this way, the second rod member driven by the water supply pressure of the tap water flowing into the pressure chamber is made to protrude toward the drain valve holding mechanism, so that the drain valve holding mechanism is operated. Force can be applied. This makes it necessary to provide a shaft seal between the pressure chamber and the second rod member, compared to a configuration in which the second rod member extends through the pressure chamber and is drawn into the pressure chamber. This eliminates the sliding resistance caused by the shaft seal and improves responsiveness.

In the present invention, preferably, the drive unit of the valve-controlled hydraulic drive unit includes an elastic membrane that is connected to the second rod member and deforms by the water supply pressure of tap water flowing into the pressure chamber, and the second rod member includes: It is protruded by the deformation of the elastic membrane.
According to the present invention configured in this way, the drive section that drives the second rod member includes an elastic membrane. Therefore, compared to using a piston that slides inside the cylinder as the drive unit, there is no need to provide a sliding seal between the cylinder and the piston, eliminating sliding resistance of the piston and improving responsiveness. can be done.

In the present invention, preferably, the valve control hydraulic drive unit moves the second rod member based on the water supply pressure of tap water to quickly release the engagement between the engagement member of the clutch mechanism and the drain valve.
According to the present invention configured in this way, the engagement between the drain valve and the first rod member by the clutch mechanism is achieved by driving the second rod member of the valve control hydraulic drive unit based on the water supply pressure of tap water. This allows for early release. Thereby, the timing at which the clutch mechanism disengages the drain valve from the first rod member can be controlled in accordance with the selected amount of washing water, and a plurality of amounts of washing water can be switched.

In the present invention, preferably, the drain valve holding mechanism includes a first float device that holds the drain valve at a first height position so that a first amount of washing water is discharged, and a second float device that holds the drain valve at a first height position so that a first amount of washing water is discharged. a second float device that holds the drain valve at a second height position lower than the first height position so that water is discharged; a clutch mechanism at a position higher than the second height position and lower than the first height position such that the drain valve is held by the second float device when the second flush water volume is selected; disengage.
According to the present invention configured in this way, the drain valve can be held at two height positions by the first float device and the second float device. Thereby, the first wash water amount and the second wash water amount can be set accurately. Further, when the second washing water amount is selected, the engagement by the clutch mechanism is higher than the second height position where the clutch mechanism engages with the second float device, and the first height position where the clutch mechanism engages with the first float device. It is canceled at a position lower than the height position. Thereby, it is possible to switch the float device to be activated and set the amount of cleaning water to be discharged according to the selected amount of cleaning water.

In the present invention, preferably, the second rod member of the valve control hydraulic drive unit protrudes toward the drain valve holding mechanism due to the supply pressure of tap water flowing into the pressure chamber, and the direction of the protrusion is such that the second rod member extends toward the drain valve holding mechanism. Crosses the direction of pulling up.
According to the present invention configured in this manner, the direction in which the second rod member of the valve control hydraulic drive section projects intersects with the direction in which the drain valve is pulled up by the clutch mechanism. Thereby, compared to the case where the clutch mechanism pulls up the drain valve in the same direction, the engagement between the drain valve and the first rod member by the clutch mechanism can be reliably released by the second rod member.

In the present invention, preferably, the second rod member of the valve-controlled hydraulic drive unit protrudes toward the clutch mechanism due to the supply pressure of tap water flowing into the pressure chamber, and after the second rod member protrudes to the maximum. , comes into contact with the engaging member of the clutch mechanism, and the connection between the drain valve and the drain valve hydraulic drive section is released.
According to the present invention configured in this way, after the second rod member protrudes to the maximum, it comes into contact with the engagement member of the clutch mechanism, and the connection between the drain valve and the drain valve hydraulic drive section is released. As a result, the second rod member and the engagement member of the clutch mechanism can be brought into contact with each other more reliably, and the engagement between the drain valve and the first rod member can be reliably released by the second rod member. becomes.

In the present invention, preferably the valve control hydraulic drive section is supplied with tap water at the same time as the drain valve hydraulic drive section or earlier than the drain valve hydraulic drive section.
According to the present invention configured in this way, the timing at which tap water is supplied to the valve control hydraulic drive section is earlier than or at the same time as the timing at which tap water is supplied to the drain valve hydraulic drive section. This makes it possible to more reliably release the engagement between the drain valve and the first rod member by the clutch mechanism by the second rod member being actuated early by the valve control hydraulic drive section.

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. 3 is a diagram schematically showing the configuration of a clutch mechanism included in the wash water tank device according to the embodiment of the present invention and its operation in a large wash mode. It is a figure which shows typically the structure of the clutch mechanism with which the wash water tank apparatus by embodiment of this invention is equipped, and an effect|action in a small wash mode. 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. 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 functions as 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. do. In this embodiment, the human sensor 8 is provided on the toilet seat, but the present invention is not limited to this form, and can detect the user's sitting, leaving, approaching, leaving, and waving of the user's hand. 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. I can do it.

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 .
The wash water tank device 4 also includes a clutch mechanism 30 that is connected to the drain valve 12 and pulls up the drain valve 12 by the driving force of the drain valve hydraulic drive unit 14, and a clutch mechanism 30 that is connected to the drain valve 12 and pulls up the drain valve 12 by the driving force of the drain valve hydraulic drive unit 14. The first float device 26 engages with the drain valve 12 and holds the drain valve 12 at the first height position, and the first float device 26 engages with the drain valve 12 that has been disengaged by the clutch mechanism 30 and holds the drain valve 12 at the first height position. and a second float device 28 for holding the drain valve 12 at a second lower height position. These clutch mechanism 30, first float device 26, and second float device 28 function as a drain valve holding mechanism that prevents the drain valve 12 from lowering due to its own weight for a predetermined period of time by engaging with the drain valve 12. Further, the wash water tank device 4 includes a valve control hydraulic drive unit 20 that applies tap water supply pressure as an operating force to the drain valve holding mechanism in order to control the amount of wash water, and a valve control hydraulic drive unit 20 that controls the wash water. It has inside thereof a washing water amount control valve 22 for supplying washing water amount control valve 22 and a solenoid valve 24 attached to washing water amount control valve 22.

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. It has a first rod member 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. Furthermore, a clutch mechanism 30 that is a drain valve holding mechanism is provided at the lower end of the first rod member 32, and the clutch mechanism 30 connects and disconnects the first rod member 32 and the valve shaft 12a of the drain valve 12. be done.

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 first rod member 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 first rod member 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 flowing into the cylinder 14a is absorbed into the gap 14d. flows out from. 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. Note that in this embodiment, a configuration has been described in which the pilot valve 16e is opened and closed by electronic control using the float switch 42, but a structural device that links the pilot valve 16e with a float that moves up and down according to the water level in the water storage tank 10 is also available. The pilot valve 16e may be opened and closed by the following.

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.

The valve control hydraulic drive unit 20 is configured to apply a force based on the water supply pressure of wash water supplied from the water supply to the clutch mechanism 30 that constitutes the drain valve holding mechanism as an operating force. Specifically, the valve control water pressure drive unit 20 includes a pressure chamber 20a into which water supplied from the wash water amount control valve 22 flows, and a drive unit driven by the water supply pressure of the water that flows into the pressure chamber 20a. It has an elastic membrane 20b and a second rod member 20c that is driven by the elastic membrane 20b and applies an operating force to the clutch mechanism 30.

The pressure chamber 20a is formed smaller than the volume of the cylinder 14a of the drain valve hydraulic drive unit 14. Thereby, the second rod member 20c can be driven by only supplying a small amount of tap water, and the responsiveness of the valve control hydraulic drive section 20 can be increased.

Further, an outflow hole 20f is provided at the lower end of the pressure chamber 20a, and the water that has flowed into the pressure chamber 20a flows out into the water storage tank 10 through this outflow hole 20f. This outflow hole 20f is relatively narrow and has a large flow path resistance, so even when water flows out from the outflow hole 20f, the pressure in the pressure chamber 20a increases due to the water flowing in from the wash water amount control valve 22.

The elastic membrane 20b is formed of a diaphragm or the like, and is configured to drive the second rod member 20c by elastically deforming based on the water supply pressure of water flowing into the pressure chamber 20a. As a result, compared to the case where the second rod member 20c is driven by sliding the piston within the pressure chamber 20a, there is no need to provide a sliding seal for the piston, and sliding resistance of the piston can be eliminated. .

The second rod member 20c includes a rod 20d whose base end is connected to the elastic membrane 20b and whose tip extends horizontally toward the clutch mechanism 30, and a flat plate 20e attached to the tip of the rod 20d. It has an approximately T-shape. Further, the rod 20d whose base end is attached to the elastic membrane 20b protrudes toward the clutch mechanism 30 from the casing forming the pressure chamber 20a, but there is a gap between the casing forming the pressure chamber 20a and the rod 20d. There is no need to provide a shaft seal. This makes it possible to eliminate sliding resistance due to the shaft seal between the casing of the pressure chamber 20a and the second rod member 20c.

The second rod member 20c is projected toward the clutch mechanism 30 by deforming the elastic membrane 20b due to the increase in pressure within the pressure chamber 20a. Then, when water no longer flows in from the wash water amount control valve 22, water flows out from the outflow hole 20f, thereby reducing the pressure in the pressure chamber 20a. When the pressure within the pressure chamber 20a decreases, the deformation of the elastic membrane 20b returns to its original state, and the second rod member 20c moves toward the pressure chamber 20a. As will be described later, by protruding the second rod member 20c toward the clutch mechanism 30, which is a drain valve holding mechanism, the clutch mechanism 30 engages the valve shaft 12a of the drain valve 12 and the first rod member 32. The connection will be released early. Further, the horizontal direction in which the second rod member 20c protrudes intersects the vertical direction in which the drain valve 12 is pulled up. Thereby, the engagement between the first rod member 32 and the valve shaft 12a of the drain valve 12 by the clutch mechanism 30 can be reliably released.

Next, the wash water amount control valve 22 is configured to control water supply to the valve control hydraulic drive unit 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 electromagnetic valve 24, the main valve body 22a of the wash water amount control valve 22 is opened, and tap water flowing from the water supply pipe 38 is supplied to the valve control hydraulic drive section 20. 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 valve control hydraulic drive unit 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 FIGS. 3 and 4.
FIG. 3 schematically shows the configuration of the clutch mechanism 30, and also shows the operation of the clutch mechanism when it is lifted up by the drain valve hydraulic drive unit 14 in the deep cleaning mode. FIG. 4 schematically shows the configuration of the clutch mechanism 30, and also shows the operation of the clutch mechanism when it is pulled up by the drain valve hydraulic drive unit 14 in the small wash mode.

First, as shown in column (a) in FIG. It is configured to connect and disconnect the upper end of the valve shaft 12a of the valve 12. Further, a valve control hydraulic drive unit 20 is provided near the clutch mechanism 30 and the drain valve hydraulic drive unit 14, and is configured to project the second rod member 20c toward the clutch mechanism 30. In addition, in the deep cleaning mode shown in FIG. 3, the second rod member 20c is not projected by the valve-controlled hydraulic drive unit 20, and the valve-controlled hydraulic drive unit 20 does not affect the operation of the clutch mechanism 30. do not have.

The clutch mechanism 30 includes a rotating shaft 30a attached to the lower end of the first rod member 32, an engaging member 30b supported by the rotating shaft 30a, and an engaging member 30b provided at the upper end of the valve shaft 12a. It has an engaging claw 30d that is formed so as to be able to engage.

The rotating shaft 30a is attached to the lower end of the first rod member 32 in a horizontal direction, and rotatably supports the engaging member 30b. The engagement 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 engaging member 30b is bent into a hook shape to form a hook portion 30c. The engaging pawl 30d 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 30d 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 30c of the engaging member 30b is engaged with the bottom side of the engaging claw 30d, It is possible to pull up the drain valve 12 by means of the first rod member 32.

Next, as shown in column (b) in FIG. raised by

As shown in column (c) of FIG. 3, in the deep cleaning mode, when the drain valve 12 is pulled up to a predetermined position, the upper end of the engagement member 30b comes into contact with the bottom surface of the drain valve hydraulic drive unit 14, and the engagement occurs. The member 30b is rotated around the rotating shaft 30a. By this rotation, the hook portion 30c at the lower end of the engagement member 30b is moved in a direction away from the engagement claw 30d, and the engagement between the engagement member 30b and the engagement claw 30d is released.

Then, as shown in column (d) of FIG. 3, when the engagement between the engagement member 30b and the engagement claw 30d is released, the drain valve 12 drains the wash water stored in the water storage tank 10. , descends toward the drain port 10a. Note that, as will be described later, the lowered drain valve 12 is temporarily held at a predetermined height by the first float device 26 before sitting on the drain port 10a.

Further, 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 first rod member 32 is lowered by the biasing force of the spring 14c.

As shown in column (f) of FIG. 3, when the first rod member 32 descends, the tip of the hook portion 30c of the engaging member 30b attached to the lower end of the first rod member 32 comes into contact with the engaging claw 30d. come into contact with When the first rod member 32 further descends, the hook portion 30c of the engagement member 30b is pushed by the inclined surface of the engagement claw 30d, and the engagement member 30b is rotated, as shown in column (g) of FIG. Ru. When the first rod member 32 further descends, the hook portion 30c of the engagement member 30b climbs over the inclined surface of the engagement claw 30d, and the engagement member 30b returns to its original position due to gravity, as shown in column (h) of FIG. The hook portion 30c of the engaging member 30b and the engaging claw 30d engage with each other again, returning to the state shown in column (a) of FIG. 3.

Next, with reference to FIG. 4, the operation of the clutch mechanism 30 in the small wash mode will be described.
When the small flush mode is executed, as shown in column (b) of FIG. is supplied. Accordingly, the elastic membrane 20b within the pressure chamber 20a is deformed by the water supply pressure, and the second rod member 20c is horizontally projected toward the clutch mechanism 30. The direction in which the second rod member 20c projects intersects the vertical direction in which the drain valve 12 is pulled up. Note that in this embodiment, the cleaning water is supplied to the valve control hydraulic drive section 20 at the same time as the cleaning water is supplied to the drain valve hydraulic drive section 14 . On the other hand, as a modification, the cleaning water can be supplied to the valve control hydraulic drive unit 20 at a timing earlier than the cleaning water is supplied to the drain valve hydraulic drive unit 14.

Furthermore, as shown in column (c) of FIG. It comes into contact with the rod member 20c. That is, the bottom of the plate 20e attached to the tip of the protruding second rod member 20c comes into contact with the upper end of the engagement member 30b of the clutch mechanism 30. On the other hand, the upper side of the plate 20e contacts the bottom surface of the drain valve hydraulic drive section 14, and the plate 20e is sandwiched between the upper end of the engaging member 30b and the bottom surface of the drain valve hydraulic drive section 14. When the plate 20e of the second rod member 20c and the upper end of the engagement member 30b come into contact with each other, the engagement member 30b is rotated about the rotation axis 30a.

This rotation releases the engagement between the engagement member 30b and the engagement claw 30d. This disengagement between the engagement member 30b and the engagement claw 30d (disconnection of the clutch mechanism 30) is caused by the engagement in the deep cleaning mode caused by the contact between the upper end of the engagement member 30b and the bottom surface of the drain valve hydraulic drive unit 14. occurs earlier than the release of That is, in the small cleaning mode, the clutch mechanism 30 is disconnected earlier than in the large cleaning mode when the drain valve 12 is at a lower position. As shown in column (d) of FIG. 4, when the clutch mechanism 30 is disconnected, the drain valve 12 descends into the wash water stored in the water storage tank 10 toward the drain port 10a. Note that, as will be described later, the lowered drain valve 12 is temporarily held at a predetermined height by the second float device 28 before sitting on the drain port 10a.

Furthermore, as shown in column (e) of FIG. 4, when the wash water being supplied to the drain valve hydraulic drive unit 14 is stopped, the first rod member 32 is lowered by the biasing force of the spring 14c. At the same time, the supply of cleaning water to the valve-controlled hydraulic drive unit 20 is also stopped. Accordingly, the elastic membrane 20b within the pressure chamber 20a returns to its original shape, and the second rod member 20c moves toward the pressure chamber 20a.
Thereafter, the clutch mechanism 30 is connected by lowering the first rod member 32 (columns (f) to (h) in FIG. 4). This process is similar to the large cleaning mode.

Next, with new reference to FIG. 5, the configuration and operation of the first float device 26 and the second float device 28 will be described. FIG. 5 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. 5 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. 5, the first float device 26, which is a drain valve holding mechanism, 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. 5.

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 and an engagement member 46c supported by the support shaft 46a. 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 engagement member 46c. On the other hand, at the base end of the valve shaft 12a of the drain valve 12, a holding claw 12b is formed to be able to engage with the engaging member 46c. The holding claw 12b is a right triangular protrusion that extends from the base end of the valve shaft 12a toward the engaging member 46c, with its base oriented horizontally and its side surfaces inclined downward. It extends to

The support shaft 46a is a shaft extending in a direction perpendicular to the paper surface of FIG. 5, 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. 5. 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. 5. 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. 5 and the non-holding state shown by the imaginary line. .

Further, the engagement 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 engagement member 46c extends so that its distal end portion is curved toward the valve shaft 12a of the drain valve 12. Therefore, in the holding state in which the engaging member 46c is rotated to the position shown by the solid line in column (a) of FIG. 5, the tip end of the engaging member 46c interferes with the holding claw 12b provided on the valve shaft 12a. On the other hand, in the non-retained state in which the engagement member 46c is rotated to the position shown by the imaginary line in column (a) of FIG. 5, no interference occurs between the tip of the engagement member 46c and the holding claw 12b.

Further, the 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 are rotated from the state shown by the solid line in column (a) of FIG. 5 to the state shown by the imaginary line, the engagement member moves in conjunction with the arm member 46b. 46c is also rotated to the state shown in the imaginary line. However, in the state shown by the solid line in column (a) of FIG. 5, when the tip of the engaging member 46c is pushed upward by the holding claw 12b of the drain valve 12, only the engaging member 46c becomes idle. and can be rotated. That is, when the tip of the engaging member 46c is pushed upward by the holding claw 12b, only the engaging member 46c is moved while the first float 26a and the arm member 46b are held in the position shown by the solid line. It can be rotated to the position shown by the imaginary line in FIG.

On the other hand, as shown by the solid line in column (b) of FIG. is engaged to prevent the drain valve 12 from lowering. That is, the 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. Therefore, the drain valve 12 is pulled up by the first rod member 32 (FIGS. 3 and 4) connected to the drain valve hydraulic drive unit 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 engaging member 46c of the first holding mechanism 46, 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. 5 (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 engagement member 46c is also rotated to the position shown by the imaginary line in column (b) of FIG. 5, so that the engagement between the holding claw 12b and the engagement member 46c is released. As a result, the drain valve 12 descends and seats on the drain port 10a, thereby closing the drain port 10a.

Next, the second float device 28 will be explained with reference to FIG.
As shown in FIG. 5, the second float device 28, which is a drain valve holding mechanism, includes a second float 28a and a second holding mechanism 48 that rotatably supports the second float 28a. It is arranged on the opposite side of the first float device 26 across the valve shaft 12a of the valve 12.
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 and an engagement member 48c supported by the support shaft 48a. The configuration and operation of the second holding mechanism 48 are similar to those of the first holding mechanism 46, but the engaging member 48c constituting the second holding mechanism 48 is a holding claw provided on the valve shaft 12a of the drain valve 12. 12c. This holding claw 12c is also a right triangular protrusion, similar to the holding claw 12b with which the engaging member 46c of the first holding mechanism 46 engages, and is attached to the valve shaft 12a of the drain valve 12 at the same height as the holding claw 12b. It is formed.

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, when the drain valve 12 is held by the second holding mechanism 48, it is held at a second height lower than the first height held by the first holding mechanism 46. 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. 5 before the first float 26a. Ru.

Here, in the large cleaning mode, the clutch mechanism 30 is disconnected while the drain valve 12 is pulled up to a position higher than the first holding mechanism 46 by the drain valve hydraulic drive section 14. Therefore, when the deep cleaning mode is executed, the drain valve 12 is held for a predetermined period of time by the first holding mechanism 46 provided in the first float device 26. On the other hand, in the small cleaning mode, as described above, the clutch mechanism 30 is disconnected at a lower position than in the large cleaning mode. That is, the drain valve 12 is separated at a position higher than the second holding mechanism 48 and lower than the first holding mechanism 46. Therefore, when the small wash mode is executed, the drain valve 12 is held for a predetermined period of time by the second holding mechanism 48 provided in the second float device 28.

Next, with new reference to FIGS. 6 to 11, 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 explained.
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 holding mechanism 46 and the second holding mechanism 48 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 cleaning is performed using the first wash water amount and the small wash in which wash is performed using the second wash water amount that is smaller than the first wash water amount. It functions as a washing water amount selection means.

Next, the operation of the large cleaning mode will be explained with reference to FIGS. 6 to 8.
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 the second rod member 20c of the valve control hydraulic drive section 20 does not protrude toward the clutch mechanism 30. . When the water supply control valve 16 is opened, as shown in the upper part of FIG. 6, the wash water flowing in from the water supply pipe 38 is supplied to the drain valve hydraulic drive section 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 first rod member 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. Ru.

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 engaging member 48c of the second holding mechanism 48, and the holding claw 12c moves beyond the engaging member 48c. . When the drain valve 12 is further pulled up, the holding claw 12b pushes up and rotates the engaging member 46c of the first holding mechanism 46, and the holding claw 12b exceeds the engaging member 46c (column (a) in FIG. 5→( b) column). Next, as shown in the lower part of FIG. 6, 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 engaging 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 ((b) in FIG. 3). column → (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 both the first holding mechanism 46 and the second holding mechanism 48 are shown as solid lines in column (b) of FIG. It is in the holding state shown by . Therefore, the holding claw 12b of the drain valve 12 that has descended engages with the engaging member 46c of the first holding mechanism 46, and the drain valve 12 is held at a predetermined height by the first holding mechanism 46. By holding the drain valve 12 by the first holding mechanism 46, 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.

Next, as shown in the upper part of FIG. 7, 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. 7, 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 holding mechanism 48 shifts to the non-holding state 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, the first holding mechanism 46 is maintained in the holding state even in this state, and the wash water in the water storage tank 10 is not discharged. continue.

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 holding mechanism 46 also shifts to the non-holding state shown by imaginary lines in column (b) of FIG. 5, and the engagement between the engaging member 46c and the holding claw 12b of the drain valve 12 is released. Ru. As the first holding mechanism 46 shifts to the non-holding state, the drain valve 12 begins to descend again.

As a result, as shown in the upper part of FIG. 8, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. In this manner, 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 still water level WL to the predetermined water level _WL1 , and the first flush water volume is adjusted to the flush toilet level. It is discharged into the main 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. 8, 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 first rod member 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. 9 to 11.
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 . When the water supply control valve 16 is opened, as shown in the upper part of FIG. 9, 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 first rod member 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. Ru. Note that when the drain valve 12 is pulled up, the holding claw 12c (column (a) in FIG. 5) provided on the valve shaft 12a of the drain valve 12 pushes up and rotates the engaging member 48c of the second holding mechanism 48. , the holding claw 12c exceeds the engaging member 48c.

Furthermore, at the same time as the water supply control valve 16 is opened, 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 wash water amount control valve 22 is opened, as shown in the upper part of FIG. Figure 4). When the cleaning water flows into the pressure chamber 20a, the elastic membrane 20b provided in the pressure chamber 20a is deformed, and the second rod member 20c is accordingly protruded (column (b) in FIG. 4). Since the pressure chamber 20a of the valve control hydraulic drive unit 20 into which the cleaning water flows is small, the second rod member 20c is immediately driven when only a small amount of cleaning water flows into the pressure chamber 20a. stands out the most.

Next, as shown in the lower part of FIG. 9, when the drain valve 12 is pulled up, the upper end of the engagement member 30b of the clutch mechanism 30 touches the bottom of the plate 20e of the second rod member 20c of the valve control hydraulic drive section 20. come into contact with Further, the upper side of the plate 20e comes into contact with the bottom surface of the drain valve hydraulic drive unit 14. When the upper end of the engagement member 30b comes into contact with the bottom side of the plate 20e, the clutch mechanism 30 is disconnected (column (c) in FIG. 4). The upper end of the engaging member 30b of the clutch mechanism 30 comes into contact with the bottom side of the plate 20e after the second rod member 20c protrudes to the maximum toward the clutch mechanism 30. Further, the clutch mechanism 30 is disconnected when the drain valve 12 is pulled up to a position higher than the position held by the second holding mechanism 48 and lower than the position held by the first holding mechanism 46.

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 holding mechanism 48 is in the holding state shown by the solid line in column (b) of FIG. Therefore, as shown in the upper part of FIG. 10, the holding claw 12c of the descending drain valve 12 engages with the engaging member 48c of the second holding mechanism 48, and the drain valve 12 is held in a predetermined position by the second holding mechanism 48. is held at a height of

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. Further, after the clutch mechanism 30 is disconnected by the valve control hydraulic drive unit 20, the controller 40 sends a signal to the electromagnetic valve 24 (FIG. 2) at a predetermined timing to close the wash water amount control valve 22. As a result, when the cleaning water is no longer supplied into the pressure chamber 20a of the valve-controlled hydraulic drive unit 20, the pressure inside the pressure chamber 20a decreases as water flows out from the outflow hole 20f, causing deformation of the elastic membrane 20b. By returning to its original position, the second rod member 20c moves toward the pressure chamber 20a.

Next, as shown in the lower part of FIG. 10, 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 lower part of FIG. 10, 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 holding mechanism 48 shifts to the non-holding state shown by the imaginary line in column (b) of FIG. As a result, the engagement between the engagement member 48c and the holding claw 12c of the drain valve 12 is released. As the second holding mechanism 48 shifts to the non-holding state, the drain valve 12 begins to descend again.

Next, as shown in FIG. 11, 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 main 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 wash mode, the valve-controlled hydraulic drive section 20 is operated by the clutch mechanism 30 at a position higher than the height position of the second holding mechanism 48 and lower than the height position of the first holding mechanism 46. Disconnection of the drain valve 12 and the drain valve hydraulic drive unit 14 is released. Thereby, the drain valve 12 is not held by the first holding mechanism 46 but is held by the second holding mechanism 48 . 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 of FIG. 11, 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 first rod member 32 is lowered together with this. As a result, the clutch mechanism 30 is connected (columns (e) to (h) in FIG. 4), and returns to the standby state before toilet flushing starts (returns to the state in the lower row of FIG. 8). 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 unit 14 are connected by the clutch mechanism 30 and disconnected at a predetermined timing (FIGS. 3 and 4), so that the drain valve It becomes possible to move the drain valve 12 regardless of the operating speed of the valve hydraulic drive unit 14, and the drain valve 12 can be closed. Further, when the second wash water amount is selected by the valve control hydraulic drive section 20 applying an operating force to the clutch mechanism 30 that constitutes the drain valve holding mechanism (FIG. 4), the first wash water amount is The drain valve 12 is lowered earlier than in the selected case (FIG. 3) to close the drain port 10a. Therefore, 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 volume of the pressure chamber 20a provided in the valve control hydraulic drive unit 20 is smaller than the volume of the cylinder 14a provided in the drain valve hydraulic drive unit 14. , the second rod member 20c can be driven by simply supplying a small amount of cleaning water. Therefore, the responsiveness of the valve control hydraulic drive section 20 can be increased.

Furthermore, according to the cleaning water tank device 4 of the present embodiment, the second rod member 20c, which is driven by the water supply pressure of the tap water that has flowed into the pressure chamber 20a, is made to protrude toward the clutch mechanism 30. An operating force can be applied to 30. Therefore, compared to the case where the second rod member 20c is configured to be drawn into the pressure chamber 20a, there is no need to provide a shaft seal between the pressure chamber 20a and the second rod member 20c, and the sliding movement due to the shaft seal is eliminated. resistance can be eliminated.

Further, according to the cleaning water tank device 4 of the present embodiment, since the elastic membrane 20b is provided as the driving part for driving the second rod member 20c, when a piston sliding in the cylinder is used as the driving part, In comparison, there is no need to provide a sliding seal for the piston, and sliding resistance of the piston can be eliminated.

Furthermore, according to the wash water tank device 4 of this embodiment, the clutch mechanism 30 engages the drain valve 12 and the drain valve hydraulic drive section 14 by driving the second rod member 20c based on the tap water supply pressure. This allows for early cancellation. Therefore, the timing of disengaging the clutch mechanism 30 can be controlled, and a plurality of amounts of washing water can be switched.

Further, according to the wash water tank device 4 of the present embodiment, the drain valve 12 can be held at two height positions by the first float device 26 and the second float device 28, so that the first wash water amount and the second 2. The amount of washing water can be set accurately. Further, when the second washing water amount is selected, the engagement by the clutch mechanism 30 is higher than the second height position where the clutch mechanism 30 engages with the second float device 28 and engages with the first float device 26. Since it is released at a position lower than the first height position, the activated float device can be switched depending on the selected amount of washing water, and the amount of washing water to be discharged can be set.

Furthermore, according to the wash water tank device 4 of this embodiment, since the direction in which the second rod member 20c projects intersects the direction in which the drain valve 12 is pulled up by the clutch mechanism 30, the engagement by the clutch mechanism 30 is It can be reliably released by the rod member 20c.

Further, according to the cleaning water tank device 4 of this embodiment, after the second rod member 20c protrudes, the upper end of the engaging member 30b of the clutch mechanism 30 comes into contact with the second rod member 20c. The engagement can be reliably released by the second rod member 20c.

Furthermore, according to the cleaning water tank device 4 of this embodiment, the timing at which tap water is supplied to the valve-controlled hydraulic drive unit 20 is fixed. Since the timing is earlier than the timing at which tap water is supplied to the drain valve hydraulic drive unit 14, the engagement by the clutch mechanism 30 is reliably released by the second rod member 20c actuated early by the valve control hydraulic drive unit 20. can do.

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 washing mode is executed, the drain valve 12 is held by the second float device 28. , the valve-controlled hydraulic drive section 20 was operated. That is, when the small wash mode is executed, the second rod member 20c of the valve control hydraulic drive section 20 is made to protrude toward the clutch mechanism 30, and the engagement by the clutch mechanism 30 is changed from the engagement with the second float device 28. The release was made at a position higher than the second height position where the first float device 26 is engaged and lower than the first height position where the first float device 26 is engaged. On the other hand, as a first modification, the present invention may be configured such that the second rod member 20c of the valve-controlled hydraulic drive section 20 projects toward the first float device 26 for the large cleaning mode. That is, when the small wash mode is selected, the second rod member 20c of the valve-controlled hydraulic drive section 20 is made to protrude toward the first float 26a, and the first float 26a is forcibly switched to the non-holding state. Accordingly, when the engagement by the clutch mechanism 30 is released, the drain valve 12 is held by the second float device 28 for the small wash mode, so that the timing at which the drain port 10a is closed can be accelerated. . In this modification, the clutch mechanism 30 and the first float device 26 function as a drain valve holding mechanism.

Furthermore, as a second modification, the present invention may be configured to include only one float device. That is, the wash water tank device is configured so that the drain valve 12 is held by one float device regardless of whether the large wash mode or the small wash mode is selected. When the large cleaning mode is executed, the water level in the water storage tank 10 decreases and the float device switches to a non-holding state, thereby closing the drain valve 12. When the small wash mode is selected, the second rod member 20c of the valve-controlled hydraulic drive section 20 is made to protrude toward the float at a predetermined timing, thereby forcibly switching the float device to the non-holding state. . In this configuration, when the small wash mode is selected, the second rod member 20c of the valve control hydraulic drive section 20 is made to protrude toward the float at an early stage. Thereby, when the small cleaning mode is selected, the timing at which the drain port 10a is closed can be made earlier than when the large cleaning mode is selected. In this variation, the clutch mechanism 30 and a single float device function as a drain valve holding mechanism.

Alternatively, as a modification of the second modification, a portion of the wash water supplied to the drain valve hydraulic drive unit 14 may be supplied to the valve control hydraulic drive unit 20, thereby retracting the second rod member 20c and discharging the water. It is also possible to configure the float device in the holding state to be switched to the holding state. In this configuration, when the large cleaning mode is selected, the supply of cleaning water to the drain valve hydraulic drive unit 14 is continued until the float device is switched to the non-holding state due to a drop in the water level. On the other hand, when the small wash mode is selected, the supply of wash water to the drain valve hydraulic drive section 14 is stopped early, and the supply of wash water to the valve control hydraulic drive section 20 is also stopped. As a result, the second rod member 20c is projected, and the float device is switched to the non-holding state. As a result, when the small cleaning mode is selected, the timing at which the drain port 10a is closed can be made earlier. In this variation, the clutch mechanism 30 and a single float device function as a drain valve holding mechanism.

Furthermore, as a third modification, the present invention may be configured so that the clutch mechanism 30 is released at a predetermined timing by moving the second rod member 20c of the valve control hydraulic drive section 20 without using the float device. Can be done. That is, the second rod member 20c of the valve control hydraulic drive section 20 is arranged so as to protrude toward the clutch mechanism 30. Further, the clutch mechanism 30 is configured so that it is not released even when the drain valve 12 is pulled up to the upper end, but is released when the second rod member 20c of the valve control hydraulic drive section 20 protrudes. In this configuration, when the small washing mode is selected, the second rod member 20c is made to protrude earlier than when the large washing mode is selected, so that when the small washing mode is selected, the drain port 10a This can speed up the timing of blockage. In this modification, the clutch mechanism 30 functions as a drain valve holding mechanism.

Alternatively, as a modification of the third modification, the second rod member 20c of the valve control hydraulic drive unit 20 is previously arranged at a position where the engagement by the clutch mechanism 30 is released. In this modification, a part of the wash water supplied to the drain valve hydraulic drive unit 14 is supplied to the valve control hydraulic drive unit 20, and the second rod member 20c of the valve control hydraulic drive unit 20 is clutched by this water supply pressure. Pull it into a position where it does not come into contact with the mechanism 30. In this configuration, when the small wash mode is selected, the wash water supplied to the drain valve hydraulic drive section 14 is stopped earlier than when the large wash mode is selected. Thereby, when the small cleaning mode is selected, the second rod member 20c protrudes early, and the timing at which the drain port 10a is closed can be accelerated. In this modification, the clutch mechanism 30 functions as a drain valve holding mechanism.

1 Flush toilet device 2a Bowl portion 4 Wash water tank device 6 Remote control device (wash 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 Valve control hydraulic drive section 20a Pressure chamber 20b Elastic membrane (drive section)
20c Second rod member 20d Rod 20e Plate 20f Outflow hole 22 Washing water flow control valve 22a Main valve body 22b Pressure chamber 22c Pilot valve 24 Solenoid valve 26 First float device 26a First float 28 Second float device 28a Second float 30 Clutch Mechanism 30a Rotating shaft 30b Engagement member 30c Hook portion 30d Engagement pawl 32 First rod member 34a Drive section 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 volume selection means)
42 Float switch 44 Vacuum breaker 46 First holding mechanism 46a Support shaft 46b Arm member 46c Engagement member 48 Second holding mechanism 48a Support shaft 48b Arm member 48c Engagement member

Claims (10)

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;
It includes a clutch mechanism that connects the drain valve and the drain valve hydraulic drive section to pull up the drain valve by the driving force of the drain valve hydraulic drive section, and also includes a clutch mechanism that engages with the drain valve to reduce the dead weight of the drain valve. a drain valve holding mechanism equipped with an engaging member that prevents the drain valve from falling for a predetermined period of time;
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 valve control hydraulic drive unit that operates based on the water supply pressure of the supplied tap water and controls the timing at which the drain valve descends;
The valve control hydraulic drive section drives the engaging member of the drain valve holding mechanism by applying an operating force to the drain valve holding mechanism when the second wash water amount is selected by the washing water amount selection means. A washing water tank device characterized in that the drain valve is lowered earlier than when the first washing water amount is selected. The drain valve hydraulic drive section is connected to a cylinder into which tap water flows, a piston that is disposed within the cylinder and slides due to the water supply pressure of the tap water that flows into the cylinder, and is connected to the piston. a first rod member that protrudes and extends from a through hole formed in the cylinder, is connected to the drain valve, and drives the drain valve;
The valve control hydraulic drive unit includes a pressure chamber into which tap water flows, a drive unit driven by the water supply pressure of the tap water that has flowed into the pressure chamber, and an operating force driven by the drive unit and applied to the drain valve holding mechanism. a second rod member that acts,
The cleaning water tank device according to claim 1, wherein the volume of the pressure chamber is smaller than the volume of the cylinder. 3. The washing water tank device according to claim 2, wherein the valve control hydraulic drive section causes the second rod member to protrude toward the drain valve holding mechanism based on the water supply pressure of the tap water flowing into the pressure chamber. The drive section of the valve control hydraulic drive section includes an elastic membrane connected to the second rod member and deformed by the supply pressure of tap water flowing into the pressure chamber; The cleaning water tank device according to claim 3, wherein the cleaning water tank device is protruded by deformation of the membrane. 5. The valve control hydraulic drive section moves the second rod member based on the water supply pressure of tap water to quickly release the engagement between the engagement member of the clutch mechanism and the drain valve. The washing water tank device according to any one of the items. The drain valve holding mechanism includes a first float device that holds the drain valve at a first height position so that the first amount of water for washing is discharged, and a first float device that holds the drain valve at a first height position so that the first amount of water for washing is discharged. a second float device that holds the drain valve at a second height position lower than the first height position, and the valve control hydraulic drive section is configured to control the washing water amount selection means. a position higher than the second height position and lower than the first height position such that the drain valve is held by the second float device when the second washing water amount is selected by 6. The washing water tank device according to claim 5, wherein the clutch mechanism is disengaged. The second rod member of the valve control hydraulic drive section projects toward the drain valve holding mechanism due to the supply pressure of tap water flowing into the pressure chamber, and its protruding direction is a direction in which the drain valve is pulled up. The washing water tank device according to claim 5 or 6, which intersects with the washing water tank device. The second rod member of the valve control hydraulic drive section projects toward the clutch mechanism due to the water supply pressure of tap water flowing into the pressure chamber, and after the second rod member projects to the maximum, the second rod member protrudes toward the clutch mechanism. The cleaning water tank device according to any one of claims 5 to 7, wherein the drain valve and the drain valve hydraulic drive unit are disconnected from each other by contacting the engaging member of a clutch mechanism. Cleaning water according to any one of claims 5 to 8, wherein tap water is supplied to the valve control hydraulic drive unit at the same time as the drain valve hydraulic drive unit or earlier than the drain valve hydraulic drive unit. tank equipment. 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 9, which supplies flush water to the flush toilet bowl;
A flush toilet device characterized by having the following.

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