JP2021195862A - Washing water tank device and flush toilet bowl device equipped with the same - Google Patents

Abstract

To provide a washing water tank device capable of suppressing unstable operation of a piston and also suppressing fluctuation of a water pressure of washing water discharged from a first drainage part provided separately from an inlet part, and a flush toilet bowl device equipped with the same.SOLUTION: The washing water tank device of the present invention comprises a drain valve hydraulic drive part 14. The drain valve hydraulic drive part 14 includes: a cylinder 14a; a piston 28 that is moved from a first position to a second position by the washing water flowing into the cylinder; a rod 32 that extends from the piston through a through hole 14f formed in the cylinder; and an elastic member 20 that is provided on the piston. The cylinder 14a includes: an inlet port 14l where the washing water flows in; a first drainage part 14m that is provided separately from the inlet part and discharges washing water; and a second drainage part 14n that is provided separately from the first drainage part and is formed between the rod and the piston and the through hole part 14f.SELECTED DRAWING: Figure 6

Description

The present invention relates to a flush water tank device, and more particularly to a flush water tank device that supplies wash water to a flush toilet, and a flush toilet device including the same.

Patent Document 1 discloses an automatic cleaning device for a toilet bowl. This automatic cleaning device is equipped with a hydraulic cylinder operated by the hydraulic pressure of the supplied water, a solenoid valve for communicating or shutting off the supply of tap water to the hydraulic cylinder, and a float valve for opening and closing the valve seat. ing. Based on the operation of the solenoid valve, the pressure fluid flows into the hydraulic cylinder, the piston in the hydraulic cylinder is raised, the connecting rod, connecting chain, etc. connected to the piston are raised, and the float valve is pulled up, and the float valve is pulled up. Is opened. The piston in the penstock is provided with a sealing member that seals between the piston and the inner wall of the penstock. A small hole 23a for relief is bored in the hydraulic cylinder below.

Jikkai Sho 63-86180 Gazette

However, in the washing water tank device as shown in Patent Document 1, when the water supply pressure suddenly fluctuates, for example, suddenly rises during the supply of tap water to the hydraulic cylinder, the hydraulic cylinder has a small hole 23a for relief. Since only the cylinder is provided, the operation of the piston may become unstable due to the impact of sudden fluctuations in the water pressure of the washing water. Therefore, there is a possibility that the piston may malfunction or the toilet bowl may be poorly cleaned.

Therefore, the present invention is a washing water tank device capable of suppressing unstable operation of the piston and suppressing fluctuations in the water pressure of the washing water discharged from the first drainage part provided separately from the inlet part, and a washing water tank device thereof. It is an object of the present invention to provide a flush toilet device equipped with.

In order to solve the above-mentioned problems, one embodiment of the present invention is a washing water tank device that supplies washing water to the washing water urinal, and stores the washing water to be supplied to the washing urinal and stores the washing water. A water storage tank in which a drain port for draining the washed water to the water wash basin is formed, a drain valve that opens and closes the drain port to supply and stop the wash water to the water wash basin, and a supplied water supply. A drain valve hydraulic drive unit that drives the drain valve by using the water supply pressure of water is provided, and the drain valve hydraulic drive unit is a cylinder in which tap water is supplied as washing water and a slide in the cylinder. The piston is movably arranged and is moved from the first position to the second position by the washing water flowing into the cylinder, and the piston is connected to the drain valve. A rod extending through a through hole formed in the cylinder and an elastic member provided on the piston and having a sealing function between the piston and the inner wall of the cylinder are provided, and the washing water flows into the cylinder. An inlet portion, a first drainage portion provided separately from the inlet portion and draining washing water, a first drainage portion provided separately from the first drainage portion, and formed between the rod, the piston, and the through hole portion. It is characterized by having a second drainage section.
According to one embodiment of the present invention configured as described above, the cylinder has an inlet portion into which the washing water flows in, a first drainage portion provided separately from the inlet portion and a first drainage portion for discharging the washing water, and a first cylinder. A second drainage portion is provided separately from the drainage portion and is formed between the rod and the through hole portion. As a result, when the flow path from the inlet portion in the cylinder to the first drainage portion is not communicated or is communicated, the water supply pressure of the washing water to the cylinder suddenly fluctuates, for example, suddenly rises. The second drainage portion can soften the impact of sudden fluctuations in the water pressure of the washing water, can cushion the shock received by the washing water, and can suppress the unstable operation of the piston.

In one embodiment of the present invention, the first drainage portion is preferably formed in the cylinder.
According to one embodiment of the present invention configured as described above, the drain valve hydraulic drive unit is formed in the cylinder and is provided separately from the inlet portion and the inlet portion into which the washing water flows, and the above-mentioned. It is provided with a first drainage portion for discharging washing water from the inside of the cylinder, and a second drainage portion provided separately from the first drainage portion and formed between the rod and the piston and the through hole portion. The first drainage portion is formed in the cylinder. As described above, in a relatively simple configuration, the water supply pressure of the washing water to the cylinder rises sharply, for example, in a state where the flow path from the inlet portion in the cylinder to the first drainage portion is not communicated or is communicated. In the case of sudden fluctuations such as, the second drainage section can soften the impact of sudden fluctuations in the water pressure of the washing water, cushion the impact that the piston receives from the washing water, and suppress the unstable operation of the piston. .. Further, when the flow pressure from the inlet portion in the cylinder to the first drainage portion is communicated and the water supply pressure of the washing water to the cylinder suddenly fluctuates, for example, the second drainage portion is washed. By softening the impact of sudden fluctuations in water pressure, fluctuations in the water pressure of the washing water discharged from the first drainage portion can be suppressed. As a result, it is possible to prevent the washing water discharged to the downstream side of the first drainage section from becoming unstable. For example, when the washing water is used on the downstream side of the first drainage section, the supply of the washing water is unstable. Can be suppressed.

In one embodiment of the present invention, preferably, in the first drainage portion, the inlet of the first drainage path for draining the washing water from the inside of the cylinder to the outside of the cylinder is opened and closed by the rod and the through hole portion. In the first drainage portion, when the piston is located at the first position, the inlet of the first drainage path is closed by the rod and the through hole portion, and the first drainage path is formed. Is configured to be in a closed state, and when the piston reaches the communication position between the first position and the second position, the rod and the through hole portion are used to form the above. The inlet of the first discharge path is opened, and the first discharge path is opened.
According to one embodiment of the present invention configured in this way, when the piston is located at the first position, the first drainage path is formed by the rod and the through hole portion. When the inlet of the rod is closed and the piston reaches the communication position between the first position and the second position, the rod and the through hole portion of the first discharge path. The entrance is configured to be open. With such a relatively simple configuration, when the piston is located in the first position, the water supply pressure of the washing water does not escape to the first discharge path side, and the water supply pressure of the washing water is effectively used for the movement of the piston. Available, when the piston is located in the communicating position between the first position and the second position, the first discharge path is opened and the wash water is drawn from inside the cylinder to outside the cylinder. It is discharged through the first discharge path, and the piston can easily return to the first position from the second position or the communication position.

In one embodiment of the present invention, preferably, the first discharge path of the first drainage portion is from the first discharge path start position of the rod appearing in the cylinder so as to correspond to the communication position of the piston. It is formed by a passage extending inside the rod to the distal end of the rod.
According to one embodiment of the present invention configured in this way, the first drainage path of the first drainage section is formed by a passage extending inside the rod, so that the path is formed on the outer surface side of the rod. When the first drainage path is opened, it is possible to easily suppress the variation in the flow rate of the washing water flowing through the passage inside the rod, and the piston is located at the first position. At this time, the water supply pressure of the washing water does not escape to the first discharge path side, and the water supply pressure of the washing water can be effectively used for the movement of the piston, and when the piston is located at the communication position, the first discharge path is in the open state. The washing water is discharged from the inside of the cylinder to the outside of the cylinder through the first discharge path, and the piston can easily return to the first position from the second position or the predetermined position.

In one embodiment of the present invention, preferably, the first drainage path of the first drainage portion of the rod appears in the cylinder so as to correspond to the communication position of the piston on the outer surface portion of the rod. 1 It is formed by a groove formed from the start position of the discharge path to the distal end of the rod.
According to one embodiment of the present invention configured as described above, the first discharge path of the first drainage portion can be relatively easily formed by the groove portion formed on the outer surface portion of the rod. When the piston is located in the first position, the water supply pressure of the washing water does not escape to the first discharge path side, and the water supply pressure of the washing water can be effectively used for the movement of the piston, and the piston is positioned in the communication position. At this time, the first discharge path is opened, the washing water is discharged from the inside of the cylinder to the outside of the cylinder through the first discharge path, and the piston returns from the second position or the predetermined position to the first position. It can be done easily.

In one embodiment of the present invention, preferably, the amount of deformation of the elastic member when the piston is in the first position is while the piston is moved from the first position to the second position. This is the maximum amount of deformation of the elastic member at each position of.
According to one embodiment of the present invention configured in this way, the amount of deformation of the elastic member when the piston is in the first position is such that the piston is in the second position from the first position. This is the maximum amount of deformation of the elastic member at each position while being moved to. As a result, when the piston is in the first position, which is the position at the start of water supply that is most susceptible to fluctuations in the water supply pressure of the wash water due to water supply, the amount of deformation of the elastic member is the maximum amount of deformation and supports the piston. Since the force is also maximum, it is possible to prevent the piston from tilting due to fluctuations in the water supply pressure and causing the piston from becoming unstable.

In one embodiment of the present invention, preferably, the inner diameter of the cylinder of the portion corresponding to the first position of the piston is the smallest inner diameter of the inner diameter of the cylinder.
According to one embodiment of the present invention configured in this way, the inner diameter of the cylinder of the portion corresponding to the first position of the piston is the smallest inner diameter of the inner diameter of the cylinder. As a result, when the piston is in the first position, the amount of deformation of the elastic member is the maximum amount of deformation, and the force that supports the piston is also the largest of the supporting forces at each position. It is possible to suppress the tilting of the piston and the unstable operation of the piston by a relatively simple configuration.

In one embodiment of the present invention, preferably, the drain valve hydraulic drive unit further includes an urging member provided in the cylinder and urging the piston toward the first position side.
According to one embodiment of the present invention configured as described above, the drain valve hydraulic drive unit is further provided in the cylinder and urges the piston toward the first position side. It is equipped with a member. As a result, the urging member enables the cushioning operation of the piston and suppresses the unstable operation of the piston. Further, even when the piston is in the first position and the urging member is in an extended state and the stabilizing force is reduced, the deformation amount of the elastic member becomes the maximum deformation amount among the deformation amounts at each position, and the piston is moved. Since the supporting force is also the largest of the supporting forces at each position, the decrease in the stabilizing force of the urging member can be compensated by the supporting force of the elastic member, and the operation of the piston can be stabilized.

In one embodiment of the present invention, preferably, as the piston is moved from the first position to the second position, the cross-sectional area of the flow path in the second drainage portion is increased, and the second drainage is performed. The second drainage portion is formed so as to reduce the pressure loss of the portion.
According to one embodiment of the present invention configured in this way, as the piston is moved from the first position to the second position, the cross-sectional area of the flow path in the second drainage portion is increased. , The pressure loss of the second drainage portion is reduced. As a result, in the initial stage when the supply of the washing water into the cylinder is started, the pressure loss of the second drainage portion is set to the maximum, the supply pressure of the washing water is difficult to escape to the second drainage portion side, and the washing water is washed. The water supply pressure can be effectively used to raise the piston.

In one embodiment of the invention, preferably, as the piston is moved from the first position to the second position, between the rod of the second drainage portion and the inner wall of the through hole portion. The second drainage portion is formed so that the cross-sectional area of the flow path is increased and the pressure loss of the second drainage portion is reduced.
According to one embodiment of the present invention configured in this way, as the piston is moved from the first position to the second position, the rod of the second drainage portion and the through hole portion are formed. The second drainage portion is formed so that the cross-sectional area of the flow path to and from the inner wall is increased and the pressure loss of the second drainage portion is reduced. As a result, in the initial stage when the supply of wash water into the cylinder in which the piston is in the first position is started, the pressure loss of the second drainage portion is set to the maximum, and the supply pressure of the wash water is set to the second drainage. It is difficult to escape to the part side, and the water supply pressure of the washing water can be effectively used to raise the piston. Further, when the piston reaches the second position, the pressure loss in the second drainage portion is set to be relatively low, the washing water in the cylinder easily flows out from the second drainage portion, and the impact generated in the washing water in the cylinder is generated. Can be alleviated.

In one embodiment of the present invention, preferably, the through hole portion of the cylinder includes a bank portion that rises from a peripheral portion of the through hole at the bottom of the cylinder toward the inside of the cylinder, and the second drainage portion is With the piston in the first position, a first flow path extending between the top of the bank and the piston is provided.
According to one embodiment of the present invention configured in this way, the second drainage portion extends between the top of the bank portion and the piston in a state where the piston is in the first position. It has a flow path. As a result, in the initial stage when the supply of wash water into the cylinder in which the piston is in the first position is started, the pressure loss of the second drainage portion is set to the maximum, and the supply pressure of the wash water is set to the second drainage. It is difficult to escape to the part side, and the water supply pressure of the washing water can be effectively used to raise the piston.

In one embodiment of the present invention, it is preferable that the drain valve and the drain valve hydraulic drive unit are further connected, the drain valve is pulled up by the drain valve hydraulic drive unit, and the drain valve is cut at a predetermined timing. A clutch mechanism for lowering the drain valve is provided, and the cross-sectional area of the flow path of the second drainage portion when the clutch mechanism is disengaged is moved from the first position to the second position. It is the largest cross-sectional area of the flow path of the second drainage portion at each position between them.
According to one embodiment of the present invention configured in this way, when the clutch mechanism is disengaged, an impact is transmitted from the clutch mechanism to the piston via the rod. At this time, the cross-sectional area of the flow path of the second drainage portion is the cross-sectional area of the flow path of the second drainage portion at each position while the piston is moved from the first position to the second position. Since the cross-sectional area of the largest flow path is large and the piston is easy to move, the impact transmitted to the piston can be easily released, the operation of the piston can be stabilized, and the generation of abnormal noise due to the impact transmitted to the piston can be suppressed. ..

In one embodiment of the present invention, preferably, the central axis of the rod and the central axis of the through hole are located on the same axis as the central axis of the cylinder.
According to one embodiment of the present invention configured as described above, the central axis of the rod and the central axis of the through hole portion are located on the same axis as the central axis of the cylinder. As a result, a force is applied to the piston in the cylinder relatively evenly in the circumferential direction, and it is possible to prevent the rod from tilting with respect to the central axis of the cylinder when the rod moves up and down, and the piston is cleaned. The tilt of the rod can be suppressed even when the impact received by water is buffered.

In one embodiment of the present invention, preferably, the through-hole portion further includes a rectifying portion formed at the top thereof so that the diameter of the inner wall is substantially constant in the height direction.
According to one embodiment of the present invention configured as described above, the through hole portion is further formed so that the diameter of the inner wall becomes constant along the moving direction of the rod in the vicinity of the top portion thereof. To prepare for. As a result, the turbulence of the flow of the washing water passing through the rectifying portion can be suppressed, the washing water can be drained relatively uniformly in the circumferential direction, and the rod can be suppressed from tilting.

In one embodiment of the present invention, preferably, the maximum outer diameter of the outer diameter of the rod is smaller than the minimum inner diameter of the inner diameter of the through hole portion.
According to one embodiment of the present invention configured as described above, the maximum outer diameter of the outer diameter of the rod is smaller than the minimum inner diameter of the inner diameter of the through hole portion. Thereby, the rod can be inserted into the through hole portion from above the through hole portion to assemble the drain valve hydraulic drive unit. In addition, it is possible to prevent the washing water flowing out from between the rod of the second drainage portion and the through hole portion from colliding with the outside of the rod after the outflow and deviating the rod from the originally planned central axis, and also to the outside of the rod. It is possible to prevent the washing water from colliding with other devices and destabilizing the operation of the other devices due to the scattering of the washing water that has collided.

In one embodiment of the present invention, preferably, the washing water tank device further includes a decelerating part that slows down the flow velocity of the washing water discharged from the second drainage part.
According to one embodiment of the present invention configured in this way, the washing water tank device further includes a deceleration unit that slows down the flow velocity of the washing water discharged from the second drainage unit. As a result, the flow velocity of the washing water discharged from the second drainage portion can be slowed down. For example, the washing water discharged from the second drainage portion is discharged into the water storage tank from above the water surface in the water storage tank. Even so, it is possible to suppress the scattering of the washing water.

Further, one embodiment of the present invention is a flush toilet device, which can prevent the operation of the flush toilet and the piston from becoming unstable and is discharged from a first drainage portion provided separately from the inlet portion. It is characterized by having a washing water tank device capable of suppressing fluctuations in water pressure.

According to the present invention, it is possible to provide a flush water tank device capable of reducing the possibility that the drain valve hydraulic drive unit malfunctions, and a flush toilet device including the wash water tank device.

It is a perspective view which shows the whole flush toilet apparatus provided with the flush water tank apparatus according to 1st Embodiment of this invention. It is sectional drawing which shows the schematic structure of the washing water tank apparatus by 1st Embodiment of this invention. It is a side view which shows the appearance that the drain valve hydraulic drive part, the clutch mechanism and the drain valve of the washing water tank apparatus according to 1st Embodiment of this invention are arranged in a water storage tank in a standby state. It is a front sectional view cut along the IV-IV line of FIG. It is a front-back direction sectional view cut along the VV line of FIG. FIG. 5 is an enlarged partially enlarged view of the vicinity of the drain valve hydraulic drive unit of the washing water tank device of FIG. 6 is a cross-sectional view taken along line VII-VII of FIG. It is an exploded perspective view which shows by disassembling the clutch mechanism of the washing water tank device by 1st Embodiment of this invention. In the cross section of the drain valve hydraulic drive unit and the like of the washing water tank device of FIG. 5, the state in which the piston of the drain valve hydraulic drive unit is rising is shown. In the cross section of the drain valve hydraulic drive unit and the like of the washing water tank device of FIG. 5, the state when the clutch mechanism is disengaged is shown. In the cross section of the drain valve hydraulic drive unit and the like of the washing water tank device of FIG. 5, the state in which the piston of the drain valve hydraulic drive unit is raised to the second position is shown. In the cross section of the drain valve hydraulic drive unit of the washing water tank device of FIG. 5, the drain valve descends and the drain port is closed. In the cross section of the drain valve hydraulic drive unit of the washing water tank device of FIG. 5, the piston descends and the rod and the movable body attached to the drain valve come into contact with each other again. It is sectional drawing which shows the schematic structure of the washing water tank apparatus by 2nd Embodiment of this invention. FIG. 14 is an enlarged partially enlarged perspective view of a drain valve hydraulic drive unit of the washing water tank device of FIG. 14. It is sectional drawing seen along the XVI-XVI line of FIG. In the washing water tank device of FIG. 14, the state in which the piston of the drain valve hydraulic drive unit is moving toward the second position is shown. In the washing water tank device of FIG. 14, the state when the clutch mechanism is disengaged is shown. In the washing water tank device of FIG. 14, the state in which the piston of the drain valve hydraulic drive unit is moved to the second position is shown. In the washing water tank device of FIG. 14, the drain valve is lowered and the drain port is closed. It is sectional drawing which shows the schematic structure of the washing water tank apparatus according to 3rd Embodiment of this invention. FIG. 21 is an enlarged partially enlarged perspective view of a drain valve hydraulic drive unit of the washing water tank device of FIG. 21. FIG. 22 is a front view of the drain valve hydraulic drive unit of FIG. 22 as viewed from the drive unit drainage channel side along the axial direction of the first rod. FIG. 21 is a partially enlarged cross-sectional view showing a central cross section of a drain valve hydraulic drive unit of the washing water tank device of FIG. 21. In the washing water tank device of FIG. 21, the state in which the piston of the drain valve hydraulic drive unit is moving toward the second position is shown. In the washing water tank device of FIG. 21, the state when the clutch mechanism is disengaged is shown. In the washing water tank device of FIG. 21, the state in which the piston of the drain valve hydraulic drive unit is moved to the second position is shown. In the washing water tank device of FIG. 21, the drain valve is lowered and the drain port is closed. It is a partially enlarged perspective view which shows the modification of the drain valve hydraulic pressure drive part of the washing water tank apparatus by 2nd Embodiment of this invention.

Next, a flush toilet device according to the first embodiment of the present invention will be described with reference to the accompanying drawings. From the following description, many improvements and other embodiments will be apparent to those of skill in the art. Accordingly, the following description should be construed as an example only and is provided for the purpose of teaching those skilled in the art the best aspects of carrying out the present invention. The details of its structure and / or function can be substantially modified and rearranged without departing from the spirit of the present invention.
FIG. 1 is a perspective view showing the entire flush toilet device including the flush water tank device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of a washing water tank device according to the first embodiment of the present invention.

As shown in FIG. 1, the flush toilet device 1 according to the first embodiment of the present invention is mounted on a flush toilet main body 2 which is a flush toilet and a rear portion of the flush toilet main body 2, according to the first embodiment of the present invention. It is composed of a washing water tank device 4 according to a form. The flush toilet body 2 is washed with the washing water supplied from the washing water tank device 4. After the flush toilet device 1 of the present embodiment is used, a predetermined time elapses after the remote control device 6 mounted on the wall surface is operated or the motion sensor 8 provided on the toilet seat detects the user's leaving. As a result, the bowl portion 2a of the flush toilet body 2 is configured to be washed. The washing water tank device 4 according to the present embodiment discharges the washing water stored inside to the water washing toilet main body 2 based on the instruction signal from the remote control device 6 or the motion sensor 8, and the washing water is used to discharge the washing water to the bowl portion. It is configured to wash 2a.

Further, the toilet bowl cleaning operation for cleaning the bowl portion 2a is executed by the user pressing the push button 6a of the remote controller 6. In the present embodiment, the motion sensor 8 is provided on the toilet seat, but the present invention is not limited to this embodiment, and the position where the user can detect sitting, leaving or approaching, leaving, and holding a hand. It may be provided in, for example, a flush toilet main body 2 or a flush water tank device 4. Further, the motion sensor 8 may be any as long as it can detect the user's sitting, leaving, approaching, leaving, and holding a hand. For example, an infrared sensor or a microwave sensor may be used as the motion sensor 8. Can be done. Further, the remote control device 6 may be changed to an operation lever device or an operation button device having a structure capable of mechanically controlling the opening and closing of the first control valve 16 and the second control valve 22, which will be described later.

As shown in FIG. 2, the washing water tank device 4 has a water storage tank 10 for storing wash water to be supplied to the water washing urinal main body 2, and a drain valve for opening and closing a drain port 10a provided in the water storage tank 10. A drain valve hydraulic drive unit 14 which is a drain valve pull-up unit for pulling up the drain valve 12 is provided. Further, the washing water tank device 4 includes a first control valve 16 which is a water supply control device for controlling water supply to the drain valve hydraulic drive unit 14 from the water supply, and a solenoid valve 18 attached to the first control valve 16. Has inside. Further, the washing water tank device 4 has a second control valve 22 for supplying washing water to the water storage tank 10 and a solenoid valve 24 attached to the second control valve 22 inside. Further, the washing water tank device 4 has a float device 26 which is a valve control unit and a timing control mechanism for holding the pulled-up drain valve 12 at a predetermined position.

Further, the washing water tank device 4 has a clutch mechanism 30, which connects the drain valve 12 and the rod 32 extending from the drain valve hydraulic drive unit 14 to connect the drain valve 12 to the drain valve hydraulic drive unit. It is pulled up by the operation of the rod 32 of 14, and is cut at a predetermined timing to lower the drain valve 12. A casing 13 is formed above the drain valve 12, and the casing 13 is formed in a cylindrical shape with an opening on the lower side. The casing 13 is connected to and fixed to the drain valve hydraulic drive unit 14.

The water storage tank 10 is a tank configured to store the washing water to be supplied to the flush toilet body 2, and a drain port 10a for discharging the stored washing water to the flush toilet body 2 is formed at the bottom thereof. Has been done. Further, in the water storage tank 10, an overflow pipe 10b is connected to the downstream side of the drainage port 10a. The overflow pipe 10b rises vertically from the vicinity of the drain port 10a and extends above the full water level WL, which is the water stop water level of the washing water stored in the water storage tank 10. The still water level is the water level of the washing water in the water storage tank 10 in the standby state, and is distinguished from the dead water level which is the lower limit of the washing water in the water storage tank 10 at the time of washing the toilet bowl. Therefore, the washing water flowing from the upper end of the overflow pipe 10b bypasses the drain port 10a and directly flows out to the flush toilet body 2.

The drain valve 12 is a valve body device arranged to open and close the drain port 10a, and is opened by pulling the drain valve 12 upward, and the washing water in the water storage tank 10 is discharged to the flush toilet body 2. Then, the bowl portion 2a is washed. Further, the drain valve 12 closes the drain port 10a to stop the supply of the washing water to the flush toilet body 2. The drain valve 12 is formed in a C shape with a valve body portion 12b having a circular outer shape and opening and closing the drain port 10a, a valve shaft frame body 12a extending upward from the valve body portion 12b and interlocking with the valve body portion 12b. It is provided with a support portion 12d (see FIG. 8) that receives the rotating shaft 66. The drain valve 12 constitutes a direct-acting drain valve device that opens and closes the drain port 10a by moving the valve body portion 12b up and down in the vertical direction by moving the valve shaft frame body 12a up and down in the vertical direction. Further, the drain valve 12 is pulled up by the driving force of the drain valve hydraulic drive unit 14, the clutch mechanism 30 is disengaged at a predetermined timing when the drain valve 12 is pulled up to a predetermined height, and the drain valve 12 is lowered by its own weight. When the drain valve 12 descends, the drain valve 12 is held by the float device 26 for a predetermined time, and the time until the drain valve 12 sits on the drain port 10a is adjusted.

Next, the drain valve hydraulic pressure drive unit 14 will be described with reference to FIGS. 2 to 7.
As shown in FIGS. 2, 4, 5 and the like, the drain valve hydraulic pressure drive unit 14 is configured to drive the drain valve 12 by utilizing the supply water pressure of the washing water supplied from the water supply. Specifically, the drain valve hydraulic drive unit 14 includes a cylinder 14a to which tap water supplied from the first control valve 16 is supplied as washing water, and a piston 28 slidably arranged in the cylinder 14a. A rod 32 protruding from the lower end of the cylinder 14a to drive the drain valve 12, a packing 20 provided on the piston 28 and a sealing member having a sealing function between the piston 28 and the inner wall of the cylinder 14a, and the inside of the cylinder 14a. Also provided with a spring 48, which is an urging member for urging the piston 28 toward the first position H1 (see FIG. 6).

Further, a spring 48 is arranged inside the cylinder 14a to urge the piston 28 downward. 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 frame body 12a of the drain valve 12.

The axis of the cylinder 14a is arranged so as to face the vertical direction, and the piston 28 is slidably received therein in the vertical direction. Further, a drive unit water supply passage 34a is connected to the lower end portion of the cylinder 14a so that the washing water flowing out from the first control valve 16 flows into the cylinder 14a. Washing water flows into the cylinder 14a using the water supply pressure of tap water. Therefore, the piston 28 in the cylinder 14a is pushed up against the urging force of the spring 48 by the washing water flowing into the cylinder 14a. Only tap water is supplied to the cylinder 14a as washing water, and the washing water once supplied to the water storage tank 10 does not flow into the cylinder 14a. The form in which the piston 28 moves up and down in the cylinder 14a is not limited to the form in which the piston 28 moves in another direction (for example, an oblique direction or a left-right direction) in the cylinder 14a.

On the other hand, a first drainage section 14m forming an outflow hole to the drive section drainage channel 34b is provided at the upper center in the height direction of the cylinder 14a, and the drive section drainage channel 34b is a cylinder via the first drainage section 14m. It communicates with the inside of 14a. Therefore, when the washing water flows into the cylinder 14a from the drive unit water supply channel 34a connected to the lower part of the cylinder 14a, the piston 28 is pushed upward from the lower part of the cylinder 14a which is the first position H1 (see FIG. 6). .. Then, when the piston 28 is moved so as to be pushed up to the second position H2 (see FIG. 11) above the first drainage portion 14m, the water flowing into the cylinder 14a is driven from the first drainage portion 14m. It flows out through the drainage channel 34b. That is, the drive unit water supply channel 34a and the drive unit drainage channel 34b communicate with each other via the inside of the cylinder 14a when the piston 28 is moved to the second position H2. A discharge portion 54 is formed at the tip of the drive portion drainage channel 34b extending from the cylinder 14a. In this way, the drive unit drainage channel 34b forms a flow path extending to the discharge unit 54.

As shown in FIG. 6, the cylinder 14a further includes a through hole portion 14f formed in the bottom portion of the cylinder 14a on the first position side, a bank portion 14h described later in the through hole portion 14f, and an inner wall 14i of the cylinder 14a. It is provided with a water storage unit 14j capable of storing the wash water remaining between the two.

The through-hole portion 14f has a bank portion 14h that rises upward from the peripheral portion of the through-hole formed at the bottom of the cylinder 14a, and the diameter of the inner wall at the top thereof is substantially constant along the moving direction of the rod 32. It is provided with a rectifying unit 14s formed in the above. The bank portion 14h of the cylinder 14a is formed in an annular shape around the rod 32 in a top view. The rectifying portion 14s is formed from the top of the bank portion 14h to a predetermined distance below. The rectifying unit 14s forms a vertical wall extending in the vertical direction. The straightening vane 14s extends substantially parallel to the outer wall of the rod 32, and forms a flow path having a substantially constant width between the straightening vane 14s and the rod 32. As a result, the turbulence of the flow of the washing water passing between the rectifying unit 14s and the rod 32 can be suppressed.

The water storage portion 14j forms a water storage portion in the cylinder 14a at a position lower than the top of the bank portion 14h. The water storage portion 14j is formed in an annular shape. The cylinder 14a is configured so that the packing 20 is immersed in the washing water remaining in the water storage portion 14j in the cylinder 14a after cleaning each toilet bowl in a state where the lower end of the packing 20 is in the standby position at the first position H1. Has been done. Here, the washing water remaining in the cylinder 14a means that the washing water in the cylinder 14a gradually flows out from the through hole portion 14f or the like after each washing operation, and remains in the cylinder 14a in a state where this outflow is completed. Washing water (indicated by the residual water level WL3 in FIG. 6). The residual water level WL3 of the residual wash water is defined by the top 14k of the bank portion 14h described later. The drive unit water supply channel 34a is formed so as to be higher than the height of the residual water level WL3 in the path from the drain valve hydraulic drive unit 14 to the vacuum breaker 36. Therefore, when the outflow of the washing water from the cylinder 14a is completed, the washing water is stored in the cylinder 14a up to the residual water level WL3. The upper end 20a of the packing 20 is located at a height lower than the top 14k of the bank portion 14h so that the packing 20 is located in the water storage portion 14j in the state where the piston 28 is in the first position H1. When the piston 28 (lower end of the piston 28) is in the first position, the packing 20 (lower end of the packing 20) is also in the first position. Therefore, hereinafter, when the piston 28 is in the first position, The packing 20 will also be described as being the first position.

As shown in FIG. 6, the cylinder 14a has an inlet portion 14l (see FIG. 4) into which the washing water flows in, a first drainage portion 14m provided separately from the inlet portion 14l and draining the washing water, and a first drainage portion. A second drainage portion 14n formed between the rod 32 and the piston 28 and the through hole portion 14f is provided separately from the portion 14m.

The inlet portion 14l is connected to the drive portion water supply channel 34a. The inlet portion 14l is connected to the lower portion of the water storage portion 14j of the cylinder 14a. The inlet portion 14l forms a flow path communicating with the lower side of the piston 28. The first drainage section 14m is connected to the drive section drainage channel 34b and forms an outflow hole to the drive section drainage channel 34b. The second drainage section 14n communicates with the space in the water storage tank 10 on the lower side of the drainage valve hydraulic drive section 14. The second drainage portion 14n is formed between the rod 32 and the through hole portion 14f and between the piston 28 and the through hole portion 14f. The second drainage portion 14n forms a second outflow path from the cylinder 14a. The minimum cross-sectional area of the flow path of the second drainage portion 14n is smaller than the minimum cross-sectional area of the flow path of the first drainage portion 14m. The minimum value of the cross-sectional area of the flow path of the second drainage section 14n is less than half of the minimum value of the cross-sectional area of the flow path of the first drainage section 14m, and the second drainage section 14n is relative to the first drainage section 14m. To form an auxiliary drainage channel.

The second drainage portion 14n has a first flow path 14o extending laterally between the top portion 14k and the lower surface portion 28c of the bank portion 14h and an outer wall portion of the bank portion 14h in a state where the piston 28 is in the first position H1. The rod 32 and the through hole are formed between the 14p and the piston 28, and the second flow path 14q extending downward from the first flow path 14o and the piston 28 are in the first position H1. A third flow path 14r extending downward from the inner wall of the portion 14f is provided. In the state where the piston 28 is in the first position H1, the first flow path 14o is a flow path with a relatively small gap because the top portion 14k and the bottom surface portion 28c are substantially in contact with each other. The second flow path 14q and the first flow path 14o form a flow path that bends in an L shape in a cross-sectional view. Further, the second flow path 14q, the first flow path 14o, and the third flow path 14r form a flow path that bends in a U shape in a cross-sectional view. In the state where the piston 28 is in the first position H1, the piston 28 is formed so that the first flow path 14o of the flow path having a relatively small gap is formed without the top portion 14k and the bottom surface portion 28c coming into contact with each other. And the cylinder 14a may be configured.

The shape of the second drainage portion 14n is changed according to the vertical movement of the piston 28. Therefore, the total value of the cross-sectional area of the flow path in the second drainage portion 14n and the minimum value of the cross-sectional area are changed according to the movement of the piston 28. As the piston 28 is moved from the first position H1 to the second position H2, the total cross-sectional area of the flow path in the second drainage portion 14n and the minimum cross-sectional area are increased, and the second drainage portion 14n The second drainage portion 14n is formed so as to reduce the pressure loss of the water. For example, as the piston 28 is moved from the first position H1 to the second position H2, the cross-sectional area of the smallest flow path in the second drainage portion 14n is increased. For example, the cross-sectional area of the minimum flow path is the minimum cross-sectional area of the flow path of the first flow path 14o between the top portion 14k of the bank portion 14h and the lower surface portion 28c of the piston 28, and the piston 28 rises. As a result, the minimum value of the cross-sectional area of the flow path of the first flow path 14o increases. As the piston 28 is moved from the first position H1 to the second position H2, the minimum cross-sectional area of the flow path of the second flow path 14q also increases. When the piston 28 is moved from the first position H1 to the second position H2, the minimum value of the cross-sectional area of the flow path of the third flow path 14r is constant.

As will be described later, when the outer diameter of the lower part of the rod 32 is formed smaller than the outer diameter of the upper part of the rod 32, the inner wall of the rod 32 and the through hole portion 14f as the piston 28 and the rod 32 rise. The second drainage portion 14n is formed so that the cross-sectional area of the flow path of the third flow path 14r between the two, for example, the total value and the minimum value of the cross-sectional area are increased, and the pressure loss of the second drainage portion 14n is reduced. Will be done. At this time, the minimum value of the cross-sectional area of the flow path of the third flow path 14r when the piston 28 is at the first position H1 (the second drainage between the rod 32 shown in FIG. 7 and the inner wall of the through hole portion 14f). The cross-sectional area F1) of the flow path of the portion 14n is smaller than the minimum cross-sectional area of the flow path between the rod 32 and the inner wall of the through hole portion 14f when the piston 28 is at the second position H2. There is. Further, as the piston 28 rises, the minimum value of the cross-sectional area of the flow path of the first flow path 14o increases. As the piston 28 rises, the minimum cross-sectional area of the flow path of the second flow path 14q increases.

The cylinder 14a is a substantially cylindrical member, and is formed in a conical shape so that the inner diameter of the inner wall 14i of the cylinder 14a decreases as the inner diameter advances downward. The inner diameter R1 (see FIG. 5) of the cylinder 14a of the portion corresponding to the first position H1 of the piston 28 is the smallest inner diameter of the inner diameter of the cylinder. The inner diameter R1 of the cylinder 14a is smaller than the inner diameter R2 (see FIG. 11) of the cylinder 14a in the portion corresponding to the second position H2 of the piston 28. The inner diameter of the cylinder 14a gradually decreases from the inner diameter R2 at the second position toward the inner diameter R1 at the first position.

The rod 32 is a rod-shaped member connected to the lower surface of the piston 28, extends downward from the piston 28 so as to connect the piston 28 and the drain valve 12, and passes through a through hole portion 14f formed in the bottom of the cylinder 14a. It extends downward from the inside of the cylinder 14a. A part of the washing water that has flowed into the cylinder 14a flows out from the second drainage portion 14n that forms a gap between the rod 32 and the through hole portion 14f. The wash water flowing out from the second drainage unit 14n flows into the water storage tank 10. Since the second drainage section 14n is relatively narrow and has a large flow path resistance, the washwater flowing into the cylinder 14a from the drive section water supply channel 34a even when the wash water flows out from the second drainage section 14n. As a result, the pressure in the cylinder 14a rises, and the piston 28 is pushed up against the urging force of the spring 48.

As shown in FIG. 6, the central axis G1 of the rod 32 and the central axis G2 of the through hole portion 14f are located on the same axis as the central axis G3 of the cylinder 14a. The maximum outer diameter D1 of each outer diameter of the entire rod 32 is smaller than the smallest inner diameter D2 of each inner diameter of the entire through hole portion 14f. In the present embodiment, the outer diameter of the rod 32 is formed to be substantially constant from the upper part to the lower part thereof. The outer diameter of the lower part of the rod 32 may be smaller than the outer diameter of the upper part of the rod 32.

In this embodiment, the piston 28 is configured to move up and down in the cylinder 14a. The first position H1 (see FIGS. 5 and 6) of the piston 28 is located below the second position H2 (see FIG. 11). The second position H2 is a position above the first drainage portion 14m near the central portion of the cylinder 14a, for example, a position near the central portion and above the central portion of the cylinder 14a. The piston 28 includes a receiving portion 28a that receives the urging force from the spring 48, and an upper outer peripheral portion 28b formed on the upper side of the packing 20.

The receiving portion 28a is formed on the outside of the bank portion 14h in a top view. The receiving portion 28a is formed by an annular recess. The receiving portion 28a comes into contact with the lower end of the spring 48. The receiving portion 28a is located below the top 14k of the bank portion 14h in a state where the piston 28 and the packing 20 are in the first position H1. A water passage gap 29 for passing wash water is formed between the upper outer peripheral portion 28b and the inner wall 14i of the cylinder 14a. The water passage gap 29 is formed in an annular shape with a substantially uniform width over the entire circumference. Since the cylinder 14a is formed in a conical shape, the water passage gap 29 gradually becomes smaller as the piston 28 moves from the upper side to the lower side of the cylinder 14a and the water passage gap 29 gradually decreases from the upper side to the lower side of the cylinder 14a.

As shown in FIG. 6, the packing 20 is attached to the piston 28 and has a function of ensuring the watertightness of the seal between the inner wall surface of the cylinder 14a and the piston 28. The packing 20 is a so-called U packing having a U-shaped cross section. The packing 20 is arranged so that the open side portion of the U-shape is directed downward and the cross section is an upside-down U-shape. When the piston 28 is in the standby position, which is the first position, the lower end 14 g of the packing 20 is located above the full water level WL of the water storage tank 10. The packing 20 is an elastic member made of rubber. Since the packing 20 slides with respect to the inner wall surface of the cylinder 14a together with the piston 28, it suffices to have a certain degree of sealing function so as to prevent the washing water from leaking, and the packing 20 and the inner wall surface of the cylinder 14a need to have a certain degree of sealing function. There may be a slight leak of wash water between and. The packing 20 includes a lip packing (for example, L packing, V packing, etc. among the lip packings) in which the shape of the sealing portion is formed in a lip shape, and a squeeze packing (for example, an O-ring, X among the squeeze packings) for sealing by giving a squeeze. It may be a ring, etc.).

Next, the first control valve 16, the second control valve 22, and the like will be described with reference to FIG.
The first control valve 16 is configured to control water supply to the drainage valve hydraulic drive unit 14 and to control water supply and stop to the discharge unit 54 based on the operation of the solenoid valve 18. That is, the first control valve 16 has a main valve body 16a, a main valve opening 16b 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 in the pressure chamber 16c. It is equipped with a pilot valve 16d for switching pressure.

The main valve body 16a is configured to open and close the main valve port 16b of the first control valve 16, and when the main valve port 16b is opened, tap water supplied from the water supply pipe 38 is used as a drain valve hydraulic drive unit. It flows into 14. The pressure chamber 16c is provided in the housing of the first control valve 16 adjacent to the main valve body 16a. A part of tap water supplied from the water supply pipe 38 flows into the pressure chamber 16c, and the internal pressure is increased. When the pressure in the pressure chamber 16c rises, the main valve body 16a is moved toward the main valve port 16b, and the main valve port 16b is closed.

The pilot valve 16d is configured to open and close a pilot valve port (not shown) provided in the pressure chamber 16c. When the pilot valve port (not shown) is opened by the pilot valve, the water in the pressure chamber 16c flows out and the internal pressure drops. When the pressure in the pressure chamber 16c decreases, the main valve body 16a is separated from the main valve opening 16b, and the first control valve 16 is opened. Further, when the pilot valve 16d is closed, the pressure in the pressure chamber 16c rises, and the first 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 the pilot valve port (not shown). The solenoid valve 18 is electrically connected to the controller 40 and moves the pilot valve 16d based on the command signal from the controller 40. Specifically, the controller 40 receives signals from the remote controller 6 and the motion sensor 8, and the controller 40 sends an electric signal to the solenoid valve 18 to operate it.

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

Next, the second control valve 22 is configured to control water supply and stop to the water storage tank 10 based on the operation of the solenoid valve 24. The second control valve 22 is connected to the water supply pipe 38 via the first control valve 16, but the tap water supplied from the water supply pipe 38 is always the second regardless of whether the first control valve 16 is opened or closed. It is designed to flow into the control valve 22. Further, the second control valve 22 is provided with 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 solenoid valve 24. When the pilot valve 22c is opened by the solenoid valve 24, the main valve body 22a of the second control valve 22 is opened, and tap water flowing from the water supply pipe 38 is supplied to the inside of the water storage tank 10 or the overflow pipe 10b. .. Further, the solenoid valve 24 is electrically connected to the controller 40 and moves the pilot valve 22c based on the command signal from the controller 40. Specifically, the controller 40 sends an electric signal to the solenoid valve 24 based on the operation of the remote controller 6, and activates the electric signal. The solenoid valve 24 may be omitted, and when the solenoid valve 24 is omitted, the pilot valve 22c is controlled by the float switch 42 as described later.

On the other hand, a float switch 42 is connected to the pilot valve 22c. The float switch 42 is configured to control the pilot valve 22c based on the water level in the water storage tank 10 and open / close the pilot valve port (not shown). That is, the float switch 42 sends a signal to the pilot valve 22c when the water level in the water storage tank 10 reaches a predetermined water level, and closes the pilot valve port (not shown). That is, the float switch 42 is configured to set the water storage water level in the water storage tank 10 to a predetermined full water level WL which is a still water level. The float switch 42 is arranged in the water storage tank 10, and is configured to stop the water supply from the first control valve 16 to the drain valve hydraulic drive unit 14 when the water level of the water storage tank 10 rises to the full water level WL. There is. The float switch 42 can be changed to a ball tap mechanism. This ball tap mechanism includes a ball tap float that moves up and down according to the water level, and a support arm that is connected to the ball tap float and acts on the pilot valve 22c. As a result, in the ball tap mechanism, when the water level of the water storage tank 10 rises to the full water level WL, the float for the ball tap rises, the support arm connected to the float for the ball tap is rotated upward, and the pilot valve 22c is mechanically Close the pilot valve port (not shown). In the ball tap mechanism, when the water level of the water storage tank 10 drops below the full water level WL, the float for the ball tap descends, the support arm connected to the float for the ball tap is rotated downward, and the pilot valve port of the pilot valve 22c is mechanically rotated. Open the valve (not shown).

Further, the water supply channel 50 extending from the second control valve 22 is provided with a water supply channel branch portion 50a. One of the water supply channels 50 branched at the water supply channel branch portion 50a is configured to allow water to flow out into the water storage tank 10, and the other is configured to allow water to flow out into the overflow pipe 10b. Therefore, a part of the washing water supplied from the second control valve 22 is discharged to the flush toilet body 2 through the overflow pipe 10b, and the rest is stored in the water storage tank 10.

Further, a vacuum breaker 44 is provided in the water supply channel 50. The vacuum breaker 44 prevents backflow of water to the second control valve 22 side when the pressure on the second control valve 22 side becomes negative.

Further, the water supplied from the water supply is passed through a water stop valve 38a arranged on the outside of the water storage tank 10 and a constant flow valve 38b arranged in the water storage tank 10 on the downstream side of the water stop valve 38a. It is supplied to the first control valve 16 and the second control valve 22, respectively. The water stop valve 38a is provided to stop the supply of water to the washing water tank device 4 at the time of maintenance or the like, and is usually used in an opened state. The constant flow rate valve 38b is provided to allow water supplied from the water supply to flow into the first control valve 16 and the second control valve 22 at a predetermined flow rate, and has a constant flow rate regardless of the installation environment of the flush toilet device 1. It is configured to be supplied with water.

The controller 40 has a built-in CPU, memory, and the like, and controls a connected device to execute a large cleaning mode and a small cleaning mode, which will be described later, based on a predetermined control program recorded in the memory and the like. The controller 40 is electrically connected to the remote controller 6, the motion sensor 8, the solenoid valve 18, the solenoid valve 24, and the like.

Next, the float device 26 will be described. The float device 26 is provided in the vicinity of the drain valve 12. In the float device 26, after the valve shaft frame body 12a is lifted by a predetermined distance and the valve shaft frame body 12a is disconnected by the clutch mechanism 30, the valve shaft frame body 12a of the drain valve 12 descends to close the drain port 10a. It is configured to delay the valve. Specifically, the float device 26 has a float portion 26a and an engaging portion 26b interlocked with the float portion 26a. On the other hand, a holding claw 12g formed so as to be engaged with the engaging portion 26b is formed at the base end portion of the valve shaft frame body 12a of the drain valve 12.

The engaging portion 26b engages with the holding claw 12g of the valve shaft frame body 12a that has been separated and lowered by the clutch mechanism 30, and the valve shaft frame body 12a and the drain valve 12 descend and sit on the drain port 10a. It is configured to prevent. Next, the float portion 26a descends as the water level in the water storage tank 10 drops, and when the water level in the water storage tank 10 drops to a predetermined water level, the float portion 26a rotates the engaging portion 26b and holds the engaging portion 26b. The engagement of the claw 12g is released. When the engagement is released, the valve shaft frame body 12a and the drain valve 12 descend and sit on the drain port 10a. As a result, the closing of the drain valve 12 is delayed, and an appropriate amount of washing water is discharged from the drain port 10a.

Next, the configuration and operation of the clutch mechanism 30 will be described with reference to FIGS. 8 to 13.
As shown in FIG. 8, the clutch mechanism 30 is provided at the lower end of the rod 32 extending downward from the drain valve hydraulic drive unit 14, and connects the lower end of the rod 32 and the upper end of the valve shaft frame body 12a of the drain valve 12. It is configured to be released. The clutch mechanism 30 is a movable body 60 that moves so as to disconnect the drain valve 12 and the drain valve hydraulic drive unit 14, and a thin-walled portion in which the outer shape of the rod 32 is formed thinner than the upper portion on the tip side of the rod 32. It includes a pulling portion 35 whose diameter has been expanded again at the lower end of the thin portion 33 of the rod 32, and a regulating portion 37 (see FIG. 5) which hangs downward from the bottom surface of the cylinder 14a on the outside of the rod 32. ..

The movable body 60 is provided on the valve shaft frame body 12a of the drain valve 12. The movable body 60 is rotatably attached to the support portion 12d of the valve shaft frame body 12a. The movable body 60 forms a movable mechanism that operates on the drain valve side in a state of being attached to the support portion 12d. The movable body 60 is configured to switch between the engaged side posture and the non-engaged side posture, which will be described later, by a rotational operation.

The movable body 60 includes a base plate 62 extending laterally, an arm 64 that rises vertically from both sides of the base plate, a rotating shaft 66 that is the center of the rotational movement of the movable body 60, and a rod of the drain valve hydraulic drive unit 14. It includes a contact portion 68 to which the rod 32 of the drain valve hydraulic drive unit 14 comes into contact when the 32 tries to pull up the drain valve 12.

In the clutch mechanism 30, the pulling upper portion 35 of the rod 32 is positioned below the contact portion 68 of the movable body 60 in the standby state. In the clutch mechanism 30, when the rod 32 is pulled up from the standby state, the movable body 60 comes into contact with the pulling upper portion 35 of the rod 32 and pulls up the valve shaft frame body 12a of the drain valve 12. Further, as shown in FIG. 10, when the rod 32 is pulled up to a predetermined height, the base plate 62 of the clutch mechanism 30 hits the regulating portion 37, the movable body 60 rotates, and the clutch mechanism 30 is disengaged. As shown in FIGS. 12 and 13, after the movable body 60 and the drain valve 12 are lowered, the rod 32 is also lowered to return to the standby state of the clutch mechanism 30.

Next, a series of cleaning operations of the washing water tank device 4 according to the first embodiment of the present invention and the flush toilet device 1 provided with the washing water tank device 4 will be described with reference to FIGS. 2, 6 and the like.
First, in the standby state for cleaning the toilet bowl shown in FIG. 2, the water level in the water storage tank 10 is at a predetermined full water level WL, and in this state, both the first control valve 16 and the second control valve 22 are closed. ing. Further, the float device 26 is in a standby state. Next, when the user presses the cleaning button of the remote controller 6, the remote controller 6 transmits an instruction signal for cleaning the toilet bowl to the controller 40. In the water-washing toilet device 1 of the present embodiment, even when a predetermined time elapses without pressing the washing button of the remote control device 6 after the user's disengagement is detected by the human sensor 8. A cleaning instruction signal is transmitted to the controller 40.

As shown in FIG. 6, in the standby state, the piston 28 of the drain valve hydraulic drive unit 14 is in the first position H1 in the cylinder 14a. The first position H1 of the piston 28 is the lower limit position in the movable range. The piston 28 is stopped in the cylinder 14a. At this time, the lower end 20b of the packing 20 is located above the full water level WL of the water storage tank 10. Therefore, the packing 20 is directly covered with the washing water from tap water so as not to be immersed in the washing water stored in the water storage tank 10 in which the user does not know what is put into the packing 20, such as a chlorine agent for washing the toilet bowl. It is located in the area to be supplied. Therefore, it is possible to prevent the packing 20 from being deteriorated by being immersed in such a chemical or the like.
On the other hand, in the standby state, the residual water level WL3 in which the washing water remains is formed in the water storage portion 14j in the cylinder 14a. In the state where the piston 28 is in the standby position, which is the first position, the packing 20 is immersed in the washing water remaining in the water storage portion 14j in the cylinder 14a and submerged. As a result, it is possible to suppress the packing 20 from drying until most of it dries, and it is possible to suppress the formation of scale (precipitate) from the tap water in the packing 20 due to the packing 20 being repeatedly wetted and dried with the washing water. ..
Further, the packing 20 is immersed in the cleaning water directly supplied from tap water, unlike the cleaning water stored in the water storage tank 10 in which the user does not know what the cleaning agent for cleaning the toilet bowl is charged. By doing so, deterioration of the packing 20 due to chlorine or the like of the toilet bowl cleaning agent can be suppressed.

The amount of deformation of the packing 20 when the piston 28 is in the first position H1 is the maximum amount of deformation of the elastic member at each position while the piston 28 is moved from the first position H1 to the second position H2. It is the amount of deformation of. The amount of deformation of the packing 20 is determined by the opening width of the opening portion of the U-shaped packing. For example, the opening width W1 of the packing 20 when the piston 28 is in the first position H1 (see FIG. 6) is the opening width W2 of the packing 20 when the piston 28 is in the second position H2 (see FIG. 11). Is smaller than. The opening width W2 of the packing 20 is smaller than the opening width W3 (not shown) of the packing 20 in the initial state in which the packing 20 is not housed in the cylinder 14a. Further, as the piston 28 is moved from the first position H1 to the second position H2, the opening width of the packing 20 gradually increases. As described above, the amount of deformation of the packing 20 (W3-W1) when the piston 28 is in the first position H1 is the amount of deformation (W3-W2) of the packing 20 when the piston 28 is in the second position H2. Greater than.

In the standby state in which the piston 28 is in the first position H1, the spring 48 is in the most extended state, and the top portion 14k of the bank portion 14h is in contact with the bottom surface portion 28c. The piston 28 is urged toward the first position side by the spring 48, and is stopped in a state of being in contact with the top portion 14k.

In the standby state where the piston 28 is in the first position H1, the cross-sectional area of the flow path in the second drainage portion 14n is between the rod 32 and the through hole portion 14f and between the piston 28 and the through hole portion 14f. It is determined by the cross-sectional area of the flow path. The cross-sectional area of the smallest flow path in the second drainage section 14n is the cross-sectional area of the first flow path 14o, and since the top portion 14k and the lower surface portion 28c are substantially in contact with each other, the pressure loss of the second drainage section 14n Is getting bigger.

Next, upon receiving the instruction signal for cleaning the toilet bowl, the controller 40 operates the solenoid valve 18 (FIG. 2) provided in the first control valve 16 and causes the pilot valve 16d on the solenoid valve side from the pilot valve port. Let go. As a result, the pressure in the pressure chamber 16c is reduced, the main valve body 16a is separated from the main valve opening 16b, and the main valve opening 16b is opened. When the first control valve 16 is opened, the washing water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic pressure drive unit 14 via the first control valve 16. As a result, the piston 28 of the drain valve hydraulic drive unit 14 is pushed up, the drain valve 12 is pulled up via the rod 32, and the washing water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet body 2.

When the drain valve 12 is pulled up, the holding claw 12g provided on the valve shaft frame body 12a of the drain valve 12 pushes up and rotates the engaging portion 26b of the float device 26, and the holding claw 12g exceeds the engaging portion 26b. And rise.

After the standby state of the piston 28, for example, when the piston 28 is raised, the washing water that has flowed into the lower chamber 14b of the cylinder 14a below the piston 28 is retained in the lower chamber 14b by the packing 20 having a sealing function. It produces a force that raises the piston 28. On the other hand, since the piston 28 and the packing 20 move up and down in the cylinder 14a, a part of the washing water flowing into the lower chamber 14b passes between the packing 20 and the inner wall 14i of the cylinder 14a and is above the piston 28. Leaks into the upper chamber 14e of. At this time, since the water passage gap 29 is formed between the upper outer peripheral portion 28b and the inner wall 14i, the upper side of the packing 20 can be more easily immersed in the washing water. Further, the washing water can be easily immersed in the entire upper part of the packing 20. Therefore, the entire packing 20 including the upper side of the packing 20 is immersed in the washing water. It should be noted that the washing water flowing into the upper side chamber 14e easily immerses the upper side of the packing 20 due to the water passage gap 29 even when the piston 28 is lowered after the clutch mechanism 30 is disengaged and in the standby state as described later. Has been done.

Next, as shown in FIG. 10, when the drain valve 12 is further pulled up, the clutch mechanism 30 is disengaged. That is, when the drain valve 12 reaches a predetermined height, the base plate 62 of the clutch mechanism 30 hits the regulating portion 37, and the clutch mechanism 30 is disengaged.

Next, as shown in FIG. 11, when the clutch mechanism 30 is disengaged, the drain valve 12 begins to descend toward the drain port 10a due to its own weight. The holding claw 12g of the drainage valve 12 that has descended engages with the engaging portion 26b of the float device 26, and the drainage valve 12 is held at a predetermined height by the engaging portion 26b. By holding the drain valve 12 by the engaging portion 26b, the drain port 10a is maintained in the valve open state, and the flush water in the water storage tank 10 is maintained to be discharged to the flush toilet body 2. At this time, the pilot valve 16d is still in the open state, and the washing water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 14 via the first control valve 16.

When the piston 28 is raised to the second position above the first drainage portion 14m, the drive portion water supply passage 34a and the drive portion drainage passage 34b are communicated with each other through the inside of the cylinder 14a, and the washing water is discharged. It is discharged from the unit 54 into the water storage tank 10.

At this time, the water passage gap 29 between the upper outer peripheral portion 28b and the inner wall 14i is formed so as to become smaller from the upper side to the lower side of the cylinder 14a. That is, the water passage gap 29 is formed relatively large above the cylinder 14a. Further, when the piston 28 is located above the cylinder 14a, the washing water is more likely to leak from between the packing 20 and the inner wall 14i to the upper concubine 14e as compared with the case where the piston 28 is located below the cylinder 14a. .. As a result, a part of the washing water leaks from the lower chamber 14b to the upper chamber 14e on the upper side of the packing 20. Therefore, the entire packing 20 including the upper side of the packing 20 is immersed in the washing water. Further, the opening width of the packing 20 in the state where the piston 28 is in the second position H2 is the opening width W2.

For the second drainage portion 14n in the state where the piston 28 is in the second position H2, the top portion 14k and the lower surface portion 28c are separated from each other, the minimum value of the cross-sectional area of the flow path of the first flow path 14o is increased, and further. The minimum value of the cross-sectional area of the flow path of the second flow path 14q is also increased. On the other hand, the minimum value of the cross-sectional area of the flow path of the third flow path 14r remains constant. In this way, as the piston 28 rises toward the second position H2, the top portion 14k and the bottom surface portion 28c are separated from each other, and the cross-sectional areas of the first flow path 14o and the second flow path 14q are increased. The total value and the minimum value of the cross-sectional area of the flow path in the second drainage portion 14n are increased, and the pressure loss of the second drainage portion 14n becomes smaller. The clutch mechanism 30 is disengaged while the piston 28 is in the second position H2. When the clutch mechanism 30 is disengaged in this way, the minimum value of the cross-sectional area of the flow path of the second drainage portion 14n is the largest in the range of change from the first position H1 to the second position H2 of the piston 28. It is the value of the cross-sectional area of the flow path. Therefore, when the clutch mechanism 30 is disengaged, the pressure loss of the second drainage portion 14n is the minimum pressure within the range of change in pressure loss corresponding to the first position H1 to the second position H2 of the piston 28. It is a loss.

Next, when the water level in the water storage tank 10 drops, 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 pilot valve 22c provided in the second control valve 22 is opened. Therefore, the washing water is supplied from the second control valve 22 to the water storage tank 10 via the water supply channel 50. The controller 40 closes the solenoid valve 18 and closes the pilot valve 16d on the solenoid valve side when a predetermined time has elapsed from the opening of the solenoid valve 18. The main valve body 16a of the first control valve 16 is closed when the pilot valve 16d is closed. Even after the pilot valve 16d on the solenoid valve side is closed, the valve open state of the second control valve 22 is maintained, and water supply to the water storage tank 10 is continued. Since the first control valve 16 is closed, the supply of the washing water to the drain valve hydraulic drive unit 14 and the discharge unit 54 is stopped.

Further, when the water level in the water storage tank 10 drops to the predetermined water level WL1, the float portion 26a of the float device 26 descends, which moves the engaging portion 26b. As a result, the engagement between the valve shaft frame body 12a and the engaging portion 26b is released, and the valve shaft frame body 12a and the drain valve 12 begin to descend again.

As a result, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. After the first control valve 16 is closed and the water supply to the drain valve hydraulic drive unit 14 is stopped, the washing water in the cylinder 14a of the drain valve hydraulic drive unit 14 gradually flows out from the second drain unit 14n. , The piston 28 is pushed down by the urging force of the spring 48, and the rod 32 is lowered at the same time.

As a result, as shown in FIG. 13, the tip portion 32a of the rod 32 comes into contact with the base plate 62, the movable body 60 is sandwiched between the valve shaft frame body 12a and the rod 32, and is stopped, so that the toilet bowl can be washed. It returns to the standby state (see FIG. 5) before the start. In a state where the piston 28 has returned to the standby state at the first position H1, a part of the washing water has leaked into the upper chamber 14e on the upper side of the piston 28. Since the water passage gap 29 is formed so as to become smaller from the upper side to the lower side of the cylinder 14a, when the piston 28 is in the first position H1, the washing water on the upper side of the packing 20 is formed from the water passage gap 29. It can be made difficult to pass downward. As a result, the washing water can be easily maintained in the upper chamber 14e, and the upper side of the packing 20 can be more easily immersed in the washing water. Therefore, the entire packing 20 including the upper side of the packing 20 is immersed in the washing water.

Since the float switch 42 is still in the off state, the valve open state of the second control valve 22 is maintained, and water supply to the water storage tank 10 is continued. The wash water supplied through the water supply channel 50 reaches the water supply channel branch portion 50a, a part of the wash water branched at the water supply channel branch portion 50a flows into the overflow pipe 10b, and the rest enters the water storage tank 10. It is stored. The wash water that has flowed into the overflow pipe 10b flows into the flush toilet body 2 and is used for refilling the bowl portion 2a. On the other hand, with the drain valve 12 closed, the water level in the water storage tank 10 rises due to the washing water flowing into the water storage tank 10.

When the water level in the water storage tank 10 rises to a predetermined full water level WL, the float switch 42 is turned on. When the float switch 42 is turned on, the pilot valve 22c on the float switch side is closed. As a result, the pilot valve 22c is closed, so that the pressure in the pressure chamber 22b rises, the main valve body 22a of the second control valve 22 is closed, and the water supply is stopped. Therefore, as shown in FIG. 2, the device in the water storage tank 10 is in a state of returning to the standby state.

According to the washing water tank device 4 according to the first embodiment of the present invention described above, the cylinder 14a is provided separately from the inlet portion 14l into which the washing water flows and the inlet portion 14l, and the first drainage to discharge the washing water. A second drainage portion 14n is provided separately from the first drainage portion 14m and is formed between the rod 32 and the through hole portion 14f. As a result, the flow pressure of the washing water to the cylinder 14a suddenly rises in a state where the flow path from the inlet portion 14l in the cylinder 14a to the first drainage portion 14m is not communicated or is communicated. In this case, the second drainage portion 14n can soften the impact of abrupt fluctuations in the water pressure of the washing water, can cushion the impact received by the washing water on the piston 28, and can prevent the operation of the piston 28 from becoming unstable. Further, when the flow path from the inlet portion 14l in the cylinder 14a to the first drainage portion 14m is communicated and the water supply pressure of the washing water to the cylinder 14a suddenly rises, for example, the second By softening the impact of the sudden fluctuation of the water pressure of the washing water by the drainage portion 14n, it is possible to suppress the fluctuation of the water pressure of the washing water discharged from the first drainage portion 14m. As a result, it is possible to prevent the washing water discharged to the downstream side of the first drainage section 14m from becoming unstable. For example, when the washing water is used on the downstream side of the first drainage section 14m, the washing water is supplied. It can suppress the instability.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the amount of deformation of the packing 20 when the piston 28 is in the first position H1 is such that the piston 28 is in the first position H1 to the second position H1. This is the maximum amount of deformation of the packing 20 at each position while being moved to position H2. As a result, when the piston 28 is located at the first position H1 which is the position at the start of water supply which is most susceptible to the fluctuation of the water supply pressure of the washing water due to the water supply, the deformation amount of the packing 20 is the maximum deformation amount, and the piston 28 Since the force for supporting the piston 28 is also maximum, it is possible to prevent the piston 28 from tilting due to the fluctuation of the water supply pressure and the operation of the piston 28 from becoming unstable.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the inner diameter of the cylinder 14a of the portion corresponding to the first position H1 of the piston 28 is the smallest inner diameter of the inner diameter of the cylinder 14a. As a result, when the piston 28 is located at the first position H1, the amount of deformation of the packing 20 is the maximum amount of deformation, and the force supporting the piston 28 is also the maximum of the supporting forces at each position, so that the water supply pressure fluctuates. In response to this, the piston 28 is tilted and the operation of the piston 28 becomes unstable, which can be suppressed by a relatively simple configuration.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the drain valve hydraulic drive unit 14 is further provided in the cylinder 14a and the piston 28 is urged toward the first position H1 side. A spring 48 is provided. As a result, the spring 48 enables the buffering operation of the piston 28 and suppresses the unstable operation of the piston 28. Further, even when the piston 28 is in the first position H1 and the spring 48 is in an extended state and the stabilizing force is reduced, the deformation amount of the packing 20 becomes the maximum deformation amount among the deformation amounts at each position, and the piston. Since the force supporting the 28 is also the maximum of the supporting forces at each position, the decrease in the stabilizing force of the spring 48 can be compensated by the supporting force of the packing 20, and the operation of the piston 28 can be stabilized.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, as the piston 28 is moved from the first position H1 to the second position H2, the flow path in the second drainage portion 14n is cut off. The area is increased and the pressure loss of the second drainage portion 14n is reduced. As a result, in the initial stage when the supply of the washing water into the cylinder 14a is started, the pressure loss of the second drainage portion 14n is set to the maximum, and the supply pressure of the washing water is hard to escape to the second drainage portion 14n side. , The water supply pressure of the washing water can be effectively used to raise the piston 28.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, as the piston 28 is moved from the first position H1 to the second position H2, the rod 32 and the through hole of the second drainage portion 14n are formed. The second drainage section 14n is formed so that the cross-sectional area of the flow path between the section 14f and the inner wall is increased and the pressure loss of the second drainage section 14n is reduced. As a result, in the initial stage when the supply of the washing water into the cylinder 14a in which the piston 28 is in the first position H1 is started, the pressure loss of the second drainage portion 14n is set to the maximum, and the water supply pressure of the washing water is set to the maximum. Is difficult to escape to the second drainage portion 14n side, and the water supply pressure of the washing water can be effectively used for raising the piston 28. Further, when the piston 28 reaches the second position H2, the pressure loss of the second drainage portion 14n is set to be relatively low, and the washing water in the cylinder 14a easily flows out from the second drainage portion 14n, and the inside of the cylinder 14a. The impact generated in the washing water can be mitigated.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the second drainage portion 14n has the top portion 14k of the bank portion 14h and the piston 28 in a state where the piston 28 is in the first position H1. A first flow path 14o extending laterally between them and a second flow path 14q formed between the outer wall portion 14p of the bank portion 14h and the piston 28 and extending downward from the first flow path 14o. Be prepared. As a result, in the initial stage when the supply of the washing water into the cylinder 14a in which the piston 28 is in the first position H1 is started, the pressure loss of the second drainage portion 14n is set to the maximum, and the water supply pressure of the washing water is set to the maximum. Is difficult to escape to the second drainage portion 14n side, and the water supply pressure of the washing water can be effectively used for raising the piston 28.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, when the clutch mechanism 30 is disengaged, an impact is transmitted from the clutch mechanism 30 to the piston 28 via the rod 32. At this time, the cross-sectional area of the flow path of the second drainage portion 14n is the cross-sectional area of the flow path of the second drainage portion 14n at each position while the piston 28 is moved from the first position H1 to the second position H2. Of these, the cross-sectional area of the largest flow path makes it easier for the piston 28 to move, so the impact transmitted to the piston 28 can be easily released, stabilizing the operation of the piston 28 and making abnormal noise due to the impact transmitted to the piston 28. Can be suppressed.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the central axis G1 of the rod 32 and the central axis G2 of the through hole portion 14f are located on the same axis as the central axis G3 of the cylinder 14a. There is. As a result, a force is applied to the piston 28 in the cylinder 14a relatively evenly in the circumferential direction, and the rod 32 is prevented from tilting with respect to the central axis G3 of the cylinder 14a when the rod 32 moves up and down. At the same time, the inclination of the rod 32 can be suppressed even when the impact received by the washing water on the piston 28 is buffered.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the through hole portion 14f is further formed so that the diameter of the inner wall at the top portion 14k is constant along the moving direction of the rod 32. The rectifying unit 14s is provided. As a result, the turbulence of the flow of the washing water passing through the rectifying unit 14s can be suppressed, the washing water can be drained relatively uniformly in the circumferential direction, and the rod 32 can be suppressed from tilting.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the maximum outer diameter of the rod 32 is smaller than the minimum inner diameter of the through hole portion 14f. As a result, the rod 32 can be inserted into the through hole portion 14f from above the through hole portion 14f to assemble the drain valve hydraulic drive portion 14. Further, it is possible to prevent the washing water flowing out from between the rod 32 of the second drainage portion 14n and the through hole portion 14f from colliding with the outside of the rod 32 after the outflow and deviating the rod 32 from the originally planned central axis. It is possible to prevent the washing water from colliding with other equipment and destabilizing the operation of the other equipment due to the scattering of the washing water colliding with the outside of the rod 32.

Further, the first embodiment of the present invention is the flush toilet device 1, which can prevent the operation of the flush toilet main body 2 and the piston 28 from becoming unstable, and is provided separately from the inlet portion 14l. It is characterized by having a washing water tank device 4 capable of suppressing fluctuations in the water pressure of the washing water discharged from the unit 14 m.

Next, the flush toilet device according to the second embodiment of the present invention will be described with reference to FIGS. 14 to 20.
The flush toilet device 101 according to the second embodiment has substantially the same structure as the flush toilet device according to the first embodiment described above, and thus is different from the first embodiment of the second embodiment of the present invention. However, similar parts will be described using the same reference numerals in the drawings or the specification, or the description of similar parts will be omitted.

The flush toilet device 101 according to the second embodiment of the present invention has a flush water tank device 104 according to the second embodiment of the present invention mounted on the rear portion of the flush toilet main body 2. The washing water tank device 104 according to the present embodiment discharges the washing water stored inside to the water washing toilet main body 2 based on the instruction signal from the remote control device 6 or the motion sensor 8, and the washing water is used to discharge the washing water to the bowl portion. It is configured to wash 2a.

The washing water tank device 104 includes a drain valve hydraulic drive unit 114, which is a drain valve pulling unit that pulls up the drain valve 12. Further, the washing water tank device 104 includes a first control valve 16 which is a water supply control device for controlling water supply to the drain valve hydraulic drive unit 114 from the water supply, and a solenoid valve 18 attached to the first control valve 16. Has inside. Further, the washing water tank device 104 has a float device 26 which is a valve control unit and a timing control mechanism for holding the pulled-up drain valve 12 in a predetermined position.

The wash water tank device 104 further connects the drain valve 12 and the drain valve hydraulic drive unit 114, pulls up the drain valve 12 by the driving force of the drain valve hydraulic drive unit 114, and is cut at a predetermined timing to cut the drain valve. It has a clutch mechanism 130 for lowering the twelve. The clutch mechanism 130 is provided in front of the moving direction of the second rod 133 extending laterally from the drain valve hydraulic drive unit 114, and is provided in front of the operating portion 133a of the second rod 133 and the passive portion of the clutch mechanism 130 connected to the drain valve 12. It is configured to connect / disconnect with 176. The clutch mechanism 130 is formed separately from the casing 113 of the drain valve 12, and is arranged at a distance from the outer side of the casing 113.

The clutch mechanism 130 includes an operating portion 133a located at the distal end of the second rod 133, and a passive portion 176 provided on an extension line in the moving direction of the second rod 133 extending laterally from the drain valve hydraulic drive portion 114. The elastic member 178 for the passive portion connected to the passive portion 176, the first support 180 for supporting the passive portion 176 and the elastic member 178 for the passive portion, and the elastic member 182 for the support connected to the first support 180. The second support 184 that supports the elastic member 182 for the support and the passive portion 176 in the moving direction of the second rod 133 are restricted from moving, and the passive portion 176 is moved to the elastic member 178 side for the passive portion. It is equipped with a regulation unit 186.

The actuating portion 133a is formed so as to abut on the first plane 176a of the passive portion 176. The first plane 176a extends in a direction orthogonal to the moving direction of the second rod 133. Therefore, the first plane 176a is located in front of the actuating portion 133a in a state where the elastic member 178 for the passive portion has a natural length. Therefore, when the second rod 133 moves toward the passive portion 176, the operating portion 133a of the second rod 133 presses the first plane 176a, and the second rod 133 and the passive portion 176 both move laterally. .. As the passive portion 176 and the first support 180 move, the drain valve 12 is pulled up by the connecting member 188 as described later. The expansion / contraction direction of the support elastic member 182 is a lateral direction, for example, a moving direction of the second rod 133. The first support 180 is connected to the support elastic member 182 so as to move in the expansion / contraction direction of the support elastic member 182.

The passive portion 176 forms a slope 176b on the opposite side of the first plane 176a. When the passive portion 176 is moved toward the restricting portion 186, the slope 176b comes into contact with the regulating portion 186, so that the slope 176b is pressed and moved toward the elastic member 178 for the passive portion. Therefore, the contact between the second rod 133 and the passive portion 176 is disengaged, and the clutch mechanism 130 is disengaged. The passive portion 176 is movable so as to disconnect the clutch mechanism 130. At this time, the elastic member 178 for the passive portion is in a state of being shrunk from the natural length. The expansion / contraction direction of the elastic member 178 for the passive portion is a vertical direction, for example, a direction orthogonal to the moving direction of the second rod 133. The elastic member 178 for the passive portion is formed by an elastic member such as a spring.

The first support 180 and the passive portion 176 move toward the drain valve hydraulic drive portion 114 side (drain valve 12 side) so as to return to the original natural length position by the support elastic member 182. Therefore, when the contact between the second rod 133 and the passive portion 176 is disengaged, the drain valve 12 is in a state of free fall. The elastic member 182 for the support is formed of an elastic member such as a spring.

The second support 184 is fixed to the water storage tank 10. The second support 184 is connected to the regulation unit 186. The restricting portion 186 is formed so as to abut on the slope 176b of the passive portion 176. The regulating unit 186 is arranged in the moving direction of the passive unit 176. The restricting portion 186 is formed so as to move the passive portion 176 so as to deviate from the second rod 133 so as to release the contact between the first plane 176a and the second rod 133.

The first support 180 and the upper end of the valve shaft frame body 12a of the drain valve 12 are connected by a connecting member 188. The connecting member 188 is a wire, a ball chain, or the like. Therefore, when the first support 180 is pressed by the second rod 133 and separated from the drain valve 12, the drain valve 12 is physically pulled up by the connecting member 188. The connecting member 188 has flexibility. The connecting member 188 is arranged in a connecting member conduit 189 that is curved between the first support 180 and the drain valve 12. The connecting member conduit 189 forms a tubular passage that guides the connecting member 188.

A casing 113 for accommodating the drain valve 12 is formed above the drain valve 12, and the casing 113 is formed in a cylindrical shape with an opening on the lower side. The casing 113 is formed separately from the drain valve hydraulic drive unit 114 and the clutch mechanism 130, and is arranged separately from the drain valve hydraulic drive unit 114. The casing 113 is fixed to the water storage tank 10. The casing 113 constitutes an independently arranged casing provided independently of the drain valve hydraulic drive unit 114.

The drain valve 12 is pulled up by the driving force of the drain valve hydraulic drive unit 114, the clutch mechanism 130 is disengaged at a predetermined timing when the drain valve 12 is pulled up to a predetermined height, and the drain valve 12 is lowered by its own weight. When the drain valve 12 descends, the drain valve 12 is held by the float device 26 for a predetermined time, and the time until the drain valve 12 sits on the drain port 10a is adjusted.

Next, the drain valve hydraulic pressure drive unit 114 will be described with reference to FIGS. 14 to 20.
As shown in FIG. 14 and the like, the drain valve hydraulic pressure drive unit 114 is configured to drive the drain valve 12 by utilizing the supply water pressure of the washing water supplied from the water supply. The drain valve hydraulic drive unit 114 includes a cylinder 114a in which tap water supplied from the first control valve 16 is supplied as washing water, a piston 128 slidably arranged in the cylinder 114a, and a cylinder from the piston 128. It includes a first rod 132 extending through a first through hole 114f formed in 114a and a second rod 133 extending from a piston 128 through a second through hole 114q formed in cylinder 114a. The drain valve hydraulic drive unit 114 is made of resin.

Further, a spring 48, which is an urging member, is arranged inside the cylinder 114a to urge the piston 128 toward the first position H11.

The cylinder 114a forms a horizontal cylinder that is oriented in the horizontal direction. The cylinder 114a internally accepts the piston 128 so as to be slidable in the lateral direction. The axis of the cylinder 114a extends in the horizontal direction.

It is formed on the side wall of the first through hole portion 114f and the cylinder 114a on the first position side. The first through-hole portion 114f is a bank portion 114h that rises toward the inside of the cylinder from a peripheral portion of the through-hole formed in the side wall of the cylinder 114a, and the diameter of the inner wall at the top thereof is along the moving direction of the first rod 132. It is provided with a rectifying unit 114s, which is formed so as to be substantially constant. The bank portion 114h is formed in an annular shape around the first rod 132 when viewed from the front. The rectifying portion 114s is formed from the top of the bank portion 114h to the downstream side by a predetermined distance. The rectifying unit 114s forms a horizontal wall extending in the horizontal direction. The straightening vane 114s extends substantially parallel to the outer wall of the first rod 132, and forms a flow path having a substantially constant width between the straightening vane 114s and the first rod 132. As a result, the turbulence of the flow of the washing water passing between the rectifying unit 114s and the first rod 132 can be suppressed.

The drain valve hydraulic drive unit 114 is further provided with an inlet portion 114l formed in the cylinder 114a and into which the washing water flows, and a first drainage portion 114m which is provided separately from the inlet portion 114l and discharges the washing water from the inside of the cylinder 114a. And a second drainage portion 114n which is provided separately from the first drainage portion 114m and is formed between the first rod 132 and the piston 128 and the first through hole portion 114f.

The inlet portion 114l is connected to the drive unit water supply channel 34a. The inlet portion 114l is connected to a portion upstream of the first position H11 of the cylinder 114a. The inlet portion 114l forms a flow path communicating with the upstream side of the piston 128. The washing water flowing out from the first control valve 16 flows into the cylinder 14a from the inlet portion 114l. Washing water flows into the cylinder 114a using the water supply pressure of tap water. Therefore, the piston 128 in the cylinder 114a is pushed up against the urging force of the spring 48 by the washing water flowing into the cylinder 114a. Only tap water is supplied to the cylinder 114a as washing water, and the washing water once supplied to the water storage tank 10 does not flow into the cylinder 114a. The piston 128 is not limited to the form of moving in the horizontal direction in the cylinder 114a, the cylinder is arranged in the diagonal direction or the vertical direction, and the piston 128 moves in the other direction (for example, the diagonal direction or the vertical direction) in the cylinder 114a. It may be in the form of

The first through hole portion 114f is connected to the drive section drainage channel 134b, and the first drainage section 114m extends into the drive section drainage channel 134b. The distal end of the first drainage section 114m forms an outflow hole to the drive section drainage channel 134b. The drive unit drainage channel 134b is a drainage pipe. In the first drainage portion 114m, the first drainage path inlet 170a of the first discharge path 170 for draining the washing water from the inside of the cylinder 114a to the outside of the cylinder 114a is opened and closed by the first rod 132 and the first through hole portion 114f. Is formed in. In the first drainage portion 114m, when the piston 128 is located at the first position H11, the first drainage path inlet 170a of the first discharge path 170 is closed by the first rod 132 and the first through hole portion 114f, and the first drainage portion 114m is the first. 1 The discharge path 170 is configured to be closed, and the piston 128 is in the communication position between the first position H11 and the second position H12 (for example, further behind the clutch mechanism disengagement position). When the first rod 132 and the first through hole 114f open the first discharge path inlet 170a of the first discharge path 170 when the rod reaches the predetermined position) and when the position is further back after the arrival. 1 The discharge path 170 is configured to be open. The first drainage portion 114m has a switching function such as a switching valve between the closed state and the open state of the first drainage path 170. The first drainage portion 114m has a function of forming a main drainage path for the washing water from the cylinder 114a. Further, the first drainage portion 114m has a function of forming a main water supply path for washing water to the water storage tank 10.

The first drainage path 170 of the first drainage portion 114m is formed by a passage extending inside the first rod 132. The first discharge path 170 is formed by a hollow internal passage of the first rod 132. The first discharge path inlet 170a of the first discharge path 170 is opened on the side surface of the first rod 132. When the piston 128 is moved so as to be pushed to the second position H12 behind the first position H11, the water flowing into the cylinder 114a passes from the first drainage portion 114m through the drive portion drainage channel 134b. leak. That is, the drive unit water supply channel 34a and the drive unit drainage channel 134b communicate with each other via the inside of the cylinder 114a when the piston 128 is moved to the second position H12.

The second drainage portion 114n is formed between the first rod 132 and the first through hole portion 114f and between the piston 128 and the first through hole portion 114f. The second drainage section 114n communicates the pressure chamber on the inlet side of the drainage valve hydraulic drive section 114 with the space inside the water storage tank 10. The second drainage portion 114n forms a second drainage path 172 from the cylinder 114a. When the piston 128 is located at the first position H11, the second drainage portion 114n keeps the second discharge path 172 open. The second discharge path 172 is always open regardless of the position of the piston 128. The second discharge path 172 is formed, for example, by a slight gap between the outer surface of the first rod 132 and the first through hole portion 114f, but as a modification, a water passage for the second discharge path 172 is provided. It may be provided in the first rod 132. A part of the washing water that has flowed into the cylinder 114a flows out from the second drainage portion 114n in the gap between the first rod 132 and the first through hole portion 114f. The washing water flowing out from the second drainage portion 114n flows into the water storage tank 10. Since the second drainage section 114n is relatively narrow and has a large flow path resistance, the wash water flowing into the cylinder 114a from the drive section water supply channel 34a even when the wash water flows out from the second drainage section 114n. As a result, the pressure in the cylinder 114a rises, and the piston 128 is pushed up against the urging force of the spring 48.

The minimum cross-sectional area of the second drainage path 172 of the second drainage section 114n is smaller than the minimum cross-sectional area of the first drainage path 170 of the first drainage section 114m. The minimum cross-sectional area of the second drainage path 172 of the second drainage section 114n is less than half of the minimum cross-sectional area of the first drainage path 170 of the first drainage section 114m, and the second drainage section 114n has a second drainage section 114n. An auxiliary drainage channel is formed for one drainage portion 114 m. The second drainage unit 114n has a function of forming an auxiliary drainage path for the washing water from the cylinder 114a.

The second drainage path 172 of the second drainage portion 114n is a first extending along the lower surface portion 128c between the top portion 114k and the lower surface portion 128c of the bank portion 114h with the piston 128 at the first position H11. A flow path 114o and a third flow path 114r extending laterally between the first rod 132 and the inner wall of the first through hole 114f with the piston 128 at the first position H11 are provided. In the state where the piston 128 is at the first position H11, the first flow path 114o is a flow path with a relatively small gap because the top portion 114k and the bottom surface portion 128c are substantially in contact with each other. The first flow path 114o and the third flow path 114r form a flow path that bends in an L shape in a cross-sectional view. In the state where the piston 128 is in the first position H11, the piston 128 is formed so that the first flow path 114o of the flow path with a relatively small gap is formed without the top portion 114k and the bottom surface portion 128c coming into contact with each other. And the cylinder 114a may be configured.

The shape of the second drainage portion 114n is changed according to the movement of the piston 128. Therefore, the total value of the cross-sectional area of the flow path in the second drainage portion 114n and the minimum value of the cross-sectional area are changed according to the movement of the piston 128. As the piston 128 is moved from the first position H11 to the second position H12, the total cross-sectional area of the second discharge path 172 in the second drainage portion 114n and the minimum cross-sectional area are increased, and the second The second drainage portion 114n is formed so as to reduce the pressure loss of the drainage portion 114n. For example, as the piston 128 is moved from the first position H11 to the second position H12, the cross-sectional area of the smallest flow path in the second drainage portion 114n is increased. For example, the cross-sectional area of the minimum flow path is the minimum cross-sectional area of the second discharge path 172 between the top 114k and the bottom surface 128c, and the second discharge as the piston 128 moves to the second position side. The minimum value of the cross-sectional area of the flow path of the path 172 becomes large. As the piston 128 is moved from the first position H11 to the second position H12, the minimum cross-sectional area of the flow path of the second discharge path 172 also increases.

When the outer diameter of the distal end side portion of the first rod 132 is smaller than the outer diameter of the proximal end side (piston connection portion side) portion, the piston 128 and the first rod 132 are formed. Moves to the second position side to increase the cross-sectional area of the second discharge path 172 between the first rod 132 and the inner wall of the first through hole 114f, for example, the total value and the minimum value of the cross-sectional area. The second drainage portion 114n is formed so that the pressure loss of the second drainage portion 114n is reduced. At this time, the minimum value of the cross-sectional area of the second discharge path 172 when the piston 128 is at the first position H11 (the first rod 32 and the first through hole as shown in FIG. 7 for the second drainage portion 14n). The cross-sectional area of the second drainage path 172 of the second drainage section 114n corresponding to the drainage path of the second drainage section 14n with the inner wall of the section 14f) is when the piston 128 is in the second position H12. It is smaller than the minimum cross-sectional area of the flow path between the first rod 132 and the inner wall of the first through hole 114f.

The cylinder 114a is a substantially cylindrical member, and is formed in a conical shape such that the inner diameter of the inner wall 114i of the cylinder 114a decreases as the inner diameter advances downward. Since the cylinder 114a in the second embodiment has substantially the same structure as the cylinder 14a in the first embodiment except that the cylinder 114a is arranged sideways, the description thereof will be omitted. For example, the inner diameter R1 (see FIG. 5) of the cylinder 114a of the portion corresponding to the first position H11 of the piston 128 is the smallest inner diameter of the inner diameter of the cylinder. Since the inner diameter of the cylinder 114a is the same as that of the first embodiment, the description thereof will be omitted.

The first rod 132 is a rod-shaped member connected to the inlet side surface of the piston 128. The first rod 132 extends from the piston 128 toward the pressure chamber 114g on the inlet side 114l side, and extends outward through the first through hole portion 114f on the side wall on the inlet portion side. The first rod 132 extends into the drive section drainage channel 134b extending from the first through hole portion 114f. The proximal end of the first rod 132 is connected to the piston 128, and the distal end of the first rod 132 is configured to be located inside the drive drainage channel 134b. The first rod 132 is a rod extending from the piston 128 toward the side opposite to the second rod 133, which is an operating rod for the clutch mechanism 130 extending toward the clutch mechanism 130. The rod extending from the piston 128 through the through hole formed in the cylinder 114a is not necessarily limited to the first rod 132 and the second rod 133, and the first rod 132 and the second rod 133 are one. It may be formed as a rod.

The second rod 133 is a rod-shaped member connected to the surface of the piston 128 on the inner side 114t side, and extends from the piston 128 so as to connect the piston 128 and the drain valve 12. The second rod 133 extends from the piston 128 toward the inner side portion 114t side, passes through the second through hole portion 114q formed in the inner side wall, and extends laterally from the inside of the cylinder 114a. ing. The proximal end of the second rod 133 is connected to the piston 128 and the distal end of the second rod 133 is configured to act on the passive portion 176 of the clutch mechanism 130.

As shown in FIG. 16, the central axis G1 of the first rod 132 and the central axis G2 of the first through hole portion 114f are located on the same axis as the central axis G3 of the cylinder 114a. The maximum outer diameter D1 of each outer diameter of the entire first rod 132 is smaller than the smallest inner diameter D2 of each inner diameter of the entire first through hole portion 114f. In the present embodiment, the outer diameter of the first rod 132 is formed to be substantially constant from the proximal end side to the distal end side connected to the piston. The outer diameter of the first rod 132 on the distal end side may be smaller than the outer diameter of the proximal end side of the first rod 132.

In this embodiment, the piston 128 is configured to move laterally within the cylinder 114a. The piston 128 is moved from the first position H11 (see FIG. 14) to the second position H12 (see FIG. 19) by the washing water flowing into the cylinder 114a. The first position H11 of the piston 128 is located on the inlet side of the inlet 114l, and the second position H12 is located on the clutch mechanism 130 side of the first position H11. The second position H12 is, for example, a position on the back side opposite to the inlet portion 114l side of the cylinder 114a. The piston 128 includes a receiving portion 28a (see FIG. 16) that receives an urging force from the spring 48, and an upper outer peripheral portion 28b formed on the inner side of the packing 20. Since the structure of the piston 128 in the second embodiment is almost the same as the structure of the piston 28 in the first embodiment, reference is made to FIG. 6 and related explanations, and the detailed structure of the piston 128 is omitted. do.

Since the cylinder 114a is formed in a conical shape, the water passage gap 29 gradually becomes smaller as the piston 128 moves from the second position side to the first position side of the cylinder 114a.

The packing 20 is attached to the piston 128 and has a function of ensuring the watertightness of the seal between the inner wall surface of the cylinder 114a and the piston 128. The packing 20 is a so-called U packing having a U-shaped cross section. The packing 20 is an elastic member made of rubber.

As shown in FIG. 14, the washing water tank device 104 further includes a speed reducing unit 174 that slows down the flow velocity of the washing water discharged from the second drainage unit 114n. The deceleration unit 174 is configured to reduce the flow velocity of the washing water discharged from the second drainage unit 114n. The deceleration unit 174 is, for example, a drive unit drainage channel 134b formed so as to cover the outside of the first rod 132. The drive unit drainage channel 134b extends along the outside of the first rod 132, and the washing water flowing out from the second drainage unit 114n reduces the flow velocity along the inner side wall of the drive unit drainage channel 134b. The deceleration unit 174 may be another means for decelerating the flow velocity of the washing water discharged from the second drainage unit 114n. For example, a drainage channel branch portion 134c may be provided on the drive section drainage channel 134b so that the flow velocity of the washing water is reduced by the branch in the drainage channel branch portion 134c.

Next, the first control valve 16 will be described.
The first control valve 16 is configured to control water supply to the drain valve hydraulic drive unit 114 and to control water supply and stop to the water storage tank 10 and the like based on the operation of the solenoid valve 18. Further, a vacuum breaker 36 (see FIG. 2) is provided in the drive unit water supply channel 34a between the first control valve 16 and the drain valve hydraulic drive unit 114.

When the pilot valve 16d is opened by the solenoid valve 18, the main valve body 16a of the first control valve 16 is opened, and the tap water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 114.
Further, the tap water supplied from the first control valve 16 to the drain valve hydraulic drive unit 114 is in the water storage tank 10 or overflows through the drive unit drainage channel 134b by the first drainage unit 114m and / or the second drainage unit 114n. It is supplied to the pipe 10b. Further, the first control valve 16 is provided with a pilot valve 16e, and the pilot valve 16e is opened and closed by the float switch 42.

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 and open / close the pilot valve port (not shown). That is, the float switch 42 sends a signal to the pilot valve 16e when the water level in the water storage tank 10 reaches a predetermined water level, and closes the pilot valve port (not shown). That is, the float switch 42 is configured to set the water storage water level in the water storage tank 10 to a predetermined full water level WL which is a still water level. The float switch 42 is arranged in the water storage tank 10, and is configured to stop the water supply from the first control valve 16 to the drain valve hydraulic drive unit 114 when the water level of the water storage tank 10 rises to the full water level WL. There is.

Further, a drainage channel branch portion 134c is provided in the drive section drainage channel 134b extending from the drain valve hydraulic drive section 114. One of the drive unit drainage channels 134b branched in the drainage channel branch portion 134c is configured to allow water to flow out into the water storage tank 10, and the other is configured to allow water to flow out into the overflow pipe 10b. Therefore, a part of the washing water supplied from the drain valve hydraulic drive unit 114 is discharged to the flush toilet body 2 through the overflow pipe 10b, and the rest is stored in the water storage tank 10.

The controller 40 has a built-in CPU, memory, and the like, and controls a connected device to execute a large cleaning mode and a small cleaning mode, which will be described later, based on a predetermined control program recorded in the memory and the like. The controller 40 is electrically connected to the remote controller 6, the motion sensor 8, the solenoid valve 18, and the like.

Next, the float device 26 will be described. In the float device 26, the valve shaft frame body 12a is lifted by a predetermined distance, the valve shaft frame body 12a, the connecting member 188, and the clutch mechanism 130 are disconnected from the drain valve hydraulic drive unit 114, and then the valve shaft frame of the drain valve 12 is separated. The body 12a is configured to descend and delay closing the drainage port 10a. Specifically, the float device 26 has a float portion 26a and an engaging portion 26b interlocked with the float portion 26a. On the other hand, a holding claw 12g formed so as to be engaged with the engaging portion 26b is formed at the base end portion of the valve shaft frame body 12a of the drain valve 12.

Next, a series of washing operations of the washing water tank device 104 according to the second embodiment of the present invention and the flush toilet device 101 provided with the washing water tank device 104 will be described with reference to FIGS. 14 to 20 and the like.
First, in the standby state for cleaning the toilet bowl shown in FIG. 14, the water level in the water storage tank 10 is at a predetermined full water level WL, and in this state, the first control valve 16 is closed. Further, the float device 26 is in a standby state. Next, when the user presses the cleaning button of the remote controller 6, the remote controller 6 transmits an instruction signal for cleaning the toilet bowl to the controller 40. In the water-washing toilet device 101 of the present embodiment, even when a predetermined time elapses without pressing the washing button of the remote control device 6 after the user's leaving is detected by the human sensor 8. A cleaning instruction signal is transmitted to the controller 40.

In the standby state, the piston 128 of the drain valve hydraulic drive unit 114 is in the first position H11 in the cylinder 114a. The first position H11 of the piston 128 is the position on the most inlet side in the movable range. The piston 128 is stopped in the cylinder 114a. At this time, the lower end 20b of the packing 20 is located above the full water level WL of the water storage tank 10. Therefore, the packing 20 is directly covered with the washing water from tap water so as not to be immersed in the washing water stored in the water storage tank 10 in which the user does not know what is put into the packing 20, such as a chlorine agent for washing the toilet bowl. It is located in the area to be supplied. Therefore, it is possible to prevent the packing 20 from being deteriorated by being immersed in such a chemical or the like. Further, the packing 20 is different from the washing water stored in the water storage tank 10 in which, for example, the user does not know what the cleaning agent for cleaning the toilet bowl is put into, and the packing 20 is only for the washing water directly supplied from tap water. By soaking, deterioration of the packing 20 due to chlorine or the like such as a toilet cleaning agent can be suppressed.

The amount of deformation of the packing 20 when the piston 128 is in the first position H11 is the maximum amount of deformation of the elastic member at each position while the piston 128 is moved from the first position H11 to the second position H12. It is the amount of deformation of. Since the amount of deformation of the packing 20 is the same as that of the first embodiment, the description thereof will be omitted.

In the standby state in which the piston 128 is in the first position H11, the spring 48 is in the most extended state, and the lower surface portion 128c of the piston 128 is in contact with the top portion 114k of the bank portion 114h of the cylinder 114a. The piston 128 is urged toward the first position side by the spring 48, and is stopped in a state of being in contact with the top 114k.

When the piston 128 is located at the first position H11, the first rod 132 and the first through hole 114f close the first discharge path inlet 170a of the first discharge path 170 of the first drainage portion 114 m, and the first one. The drainage path 170 is closed. When the piston 128 is located at the first position H11, the second drainage portion 114n is formed between the first rod 132 and the piston 128 and the first through hole portion 114f. That is, in the standby state, the second discharge path 172 formed between the first rod 132 and the first through hole portion 114f is in the open state. As a result, as shown in FIG. 17, when the washing water flows into the cylinder 114a, a part of the washing water is drained from the second discharge path 172 of the second drainage part 114n as shown by the arrow F11. It is designed to flow out to the road 134b side.

In the standby state where the piston 128 is in the first position H11, the cross-sectional area of the flow path in the second drainage portion 114n is between the first rod 132 and the first through hole portion 114f and between the piston 128 and the first through hole. It is determined by the cross-sectional area of the flow path to and from the portion 114f. The cross-sectional area of the smallest flow path in the second drainage section 114n is the cross-sectional area of the first flow path 114o, and since the top portion 114k and the lower surface portion 128c are substantially in contact with each other, the pressure loss of the second drainage section 114n Is getting bigger.

Next, upon receiving the instruction signal for cleaning the toilet bowl, the controller 40 operates the solenoid valve 18 (FIG. 14) provided in the first control valve 16 and causes the pilot valve 16d on the solenoid valve side from the pilot valve port. Let go. As a result, the pressure in the pressure chamber 16c is reduced, the main valve body 16a is separated from the main valve opening 16b, and the main valve opening 16b is opened. When the first control valve 16 is opened, the washing water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic pressure drive unit 114 via the first control valve 16. As a result, the piston 128 of the drain valve hydraulic drive unit 114 is pushed up, and the operating portion 133a of the second rod 133 is advanced toward the passive portion 176.

When the drain valve 12 is pulled up, the holding claw 12g provided on the valve shaft frame body 12a of the drain valve 12 pushes up and rotates the engaging portion 26b of the float device 26, and the holding claw 12g exceeds the engaging portion 26b. And rise.

After the standby state of the piston 128, for example, when the piston 128 is advancing, the washing water flowing into the pressure chamber 114b of the cylinder 114a on the first position side from the piston 128 is put into the pressure chamber 114b by the packing 20 having a sealing function. It is mainly fastened and produces a force that moves the piston 128 to the second position side.

As shown in FIG. 17, when the piston 128 and the second rod 133 move toward the second position H12, the operating portion 133a abuts on the first plane 176a of the passive portion 176, and the passive portion 176 and the first support The body 180 is pushed laterally while contracting the elastic member 182 for the support. As a result, the connecting member 188 connected to the first support 180 is pulled up, and the drain valve 12 is pulled up by the connecting member 188. Therefore, when the drain valve 12 is pulled up, the washing water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet body 2.

It is formed between the first rod 132 and the first through hole 114f until the clutch mechanism 130 is disengaged while the piston 128 is moved from the first position H11 to the second position H12. The second discharge path 172 is open. As a result, as shown by the arrow F11, a part of the washing water that has flowed into the cylinder 114a flows out from the second drainage path 172 of the second drainage section 114n to the drive section drainage channel 134b side. Since the outflow of wash water from the second discharge path 172 is relatively small, the piston 128 is pushed toward the second position H12 as planned. On the other hand, the first discharge path inlet 170a of the first discharge path 170 is closed by the first rod 132 and the first through hole portion 114f, and the first discharge path 170 of the first drainage section 114 m is closed. There is.

Next, as shown in FIG. 18, when the passive portion 176 is further advanced and pressed toward the regulating portion 186, the slope 176b comes into contact with the regulating portion 186, so that the slope 176b becomes the elastic member 178 for the passive portion. Pressed to the side, the passive portion 176 is moved to the passive portion elastic member 178 side. Therefore, the contact between the second rod 133 and the passive portion 176 is disengaged, and the clutch mechanism 130 is disengaged. That is, when the drain valve 12 is pulled up to a predetermined height, the passive portion 176 of the clutch mechanism 130 hits the regulating portion 186, and the clutch mechanism 130 is disengaged. Even after the clutch mechanism 130 is disengaged, the first discharge path 170 of the first drainage portion 114 m is in a closed state until the first discharge path inlet 170a is opened, and as shown by the arrow F12, the washing water is in a closed state. A part of the second drainage section 114n flows out from the second discharge path 172 to the drive section drainage channel 134b side.

Next, when the clutch mechanism 130 is disengaged, the drain valve 12 begins to descend toward the drain port 10a due to its own weight. The holding claw 12g of the drainage valve 12 that has descended engages with the engaging portion 26b of the float device 26, and the drainage valve 12 is held at a predetermined height by the engaging portion 26b. By holding the drain valve 12 by the engaging portion 26b, the drain port 10a is maintained in the valve open state, and the flush water in the water storage tank 10 is maintained to be discharged to the flush toilet body 2. At this time, the pilot valve 16d is still in the open state, and the washing water flowing from the water supply pipe 38 is supplied to the drain valve hydraulic drive unit 114 via the first control valve 16.

As shown in FIG. 19, the piston 128 and the first rod 132 are further pushed forward to reach the second position H12. In this process, when the piston 128 is advanced to the communication position of the piston 128 (the fourth position H14 of the piston 128 in which the communication flow path is formed), the first appearing in the cylinder 114a corresponding to the communication position of the piston 128. The first discharge path inlet 170a is opened from the first discharge path start position 132a of the rod 132. The fourth position H14 is located at a position deeper than the disengagement position where the clutch mechanism 130 is disengaged and slightly closer to the inlet side (front side) than the second position H12. The distance from the connection portion of the first rod 132 with the piston 128 to the first discharge path start position 132a, in other words, the distance from the first position H11 to the fourth position H14 is, for example, the piston 128 in the cylinder 114a. The distance is more than two-thirds of the movable distance of. When the first discharge path inlet 170a of the first discharge path 170 is opened by the first rod 132 and the first through hole portion 114f, the first discharge path 170 of the first drainage portion 114m is opened. As a result, as shown by the arrow F13, the washing water is discharged from the first discharge path 170 to the drive section drainage channel 134b, and the wash water is used as the main water supply from the discharge section at the downstream end of the drive section drainage channel 134b into the water storage tank 10. Is discharged to. At this time, as shown by the arrow F14, a part of the washing water also flows out from the second drainage path 172 of the second drainage section 114n to the drive section drainage channel 134b side.

For the second drainage portion 114n in the state where the piston 128 is in the second position H12, the top portion 114k and the lower surface portion 128c are separated from each other, and the minimum value of the cross-sectional area of the flow path of the first flow path 114o is increased. On the other hand, the minimum value of the cross-sectional area of the flow path of the third flow path 114r remains constant. In this way, as the piston 128 moves toward the second position H12, the top 114k and the bottom surface 128c are separated from each other, the cross-sectional area of the first flow path 114o is increased, and the inside of the second drainage portion 114n is increased. The total value and the minimum value of the cross-sectional area of the flow path of the second drainage portion 114n are increased, and the pressure loss of the second drainage portion 114n is reduced. The clutch mechanism 130 is disengaged while the piston 128 is heading to the second position H12. When the clutch mechanism 130 is disengaged in this way, the minimum value of the cross-sectional area of the flow path of the second drainage portion 114n is almost the maximum of the change range from the first position H11 to the second position H12 of the piston 128. It is the value of the cross-sectional area of the flow path of. Therefore, when the clutch mechanism 130 is disengaged, the pressure loss of the second drainage portion 114n is almost the smallest in the range of change in the pressure loss corresponding to the first position H11 to the second position H12 of the piston 128. It is a pressure loss.

Next, when the water level in the water storage tank 10 drops, 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 pilot valve 16e is opened. Therefore, the washing water is supplied from the first control valve 16 into the water storage tank 10 via the drive unit water supply channel 34a and the drive unit drainage channel 134b. The controller 40 closes the solenoid valve 18 and closes the pilot valve 16d on the solenoid valve side when a predetermined time has elapsed from the opening of the solenoid valve 18. On the other hand, since the pilot valve 16e is opened, the valve open state of the first control valve 16 is maintained, and the water supply to the water storage tank 10 is continued.

Further, when the water level in the water storage tank 10 drops to the predetermined water level WL1, the float portion 26a of the float device 26 descends, which moves the engaging portion 26b. As a result, the engagement between the valve shaft frame body 12a and the engaging portion 26b is released, and the valve shaft frame body 12a and the drain valve 12 begin to descend again.

As a result, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. Since the float switch 42 is still in the off state, the valve open state of the first control valve 16 is maintained, and water supply to the water storage tank 10 is continued. The wash water supplied via the drive unit drainage channel 134b reaches the drainage channel branch portion 134c, a part of the wash water branched at the drainage channel branch portion 134c flows into the overflow pipe 10b, and the rest is a water storage tank 10. It is stored inside. The wash water that has flowed into the overflow pipe 10b flows into the flush toilet body 2 and is used for refilling the bowl portion 2a. On the other hand, with the drain valve 12 closed, the water level in the water storage tank 10 rises due to the washing water flowing into the water storage tank 10.

As shown in FIG. 20, when the water level in the water storage tank 10 rises to a predetermined full water level WL, the float switch 42 is turned on. When the float switch 42 is turned on, the pilot valve 16e on the float switch side is closed. As a result, the pilot valve 16e is closed, so that the first control valve 16 is closed and the water supply is stopped. After the first control valve 16 is closed and the water supply to the drain valve hydraulic drive unit 114 is stopped, the washing water in the cylinder 114a of the drain valve hydraulic drive unit 114 gradually drains into the first drain portion 114 m and the second drain. As the water flows out from the portion 114n, the piston 128 is pushed down by the urging force of the spring 48 and returns to the first position H11. After the first discharge path inlet 170a is closed with the return of the piston 128 to the first position H11, the washing water in the cylinder is driven from the second discharge path 172 as shown by the arrow F15. It flows out to the drainage channel 134b side. Therefore, as shown in FIG. 14, the equipment in the water storage tank 10 is in a state of returning to the standby state.

According to the washing water tank device 104 according to the second embodiment of the present invention described above, the drain valve hydraulic drive unit 114 is formed in the cylinder 114a and is separate from the inlet portion 114l and the inlet portion 114l into which the washing water flows. A second drainage portion 114m, which is provided and discharges washing water from the inside of the cylinder 114a, and a second drainage portion 114m, which is provided separately from the first drainage portion 114m and is formed between the first rod 132 and the first through hole portion 114f. It is provided with a drainage unit 114n. As a result, the flow pressure of the washing water to the cylinder 114a suddenly rises in a state where the flow path from the inlet portion 114l in the cylinder 114a to the first drainage portion 114m is not communicated or is communicated. In this case, the second drainage portion 114n can soften the impact of abrupt fluctuations in the water pressure of the washing water, can cushion the impact received by the washing water on the piston 128, and can prevent the operation of the piston 128 from becoming unstable.

According to the washing water tank device 104 according to the second embodiment of the present invention described above, the first drainage portion 114m has a first rod 132 and a first through hole portion 114f when the piston 128 is located at the first position H11. When the first discharge path inlet 170a is closed and the piston 128 reaches the communication position between the first position H11 and the second position H12, the first rod 132 and the first through hole The first discharge path inlet 170a is configured to be opened by the portion 114f. With such a relatively simple configuration, when the piston 128 is located at the first position, the water supply pressure of the washing water does not escape to the first discharge path 170 side, and the water supply pressure of the washing water is moved by the piston 128. When the piston 128 is located in the communication position between the first position H11 and the second position H12, the first discharge path 170 is opened and the washing water is discharged to the cylinder 114a. The piston 128 is discharged from the inside to the outside of the cylinder 114a through the first discharge path 170, and the piston 128 can easily return to the first position H11 from the second position H12 or the communication position.

According to the washing water tank device 104 according to the second embodiment of the present invention described above, the first discharge path 170 of the first drainage portion 114 m is formed by a passage extending inside the first rod 132, and the path is formed by the first rod. Compared to the case where the first drainage path is formed on the outer surface side of the 132, it is possible to easily suppress the variation in the flow rate of the washing water flowing through the internal passage of the first rod 132 when the first drainage path is opened. When the piston 128 is located at the first position H11, the water supply pressure of the washing water does not escape to the first discharge path 170 side, and the water supply pressure of the washing water can be effectively used for the movement of the piston 128, and the piston 128 communicates. When in the position, the first discharge path 170 is opened, the washing water is discharged from the inside of the cylinder 114a to the outside of the cylinder 114a through the first discharge path 170, and the piston 128 is in the second position H12 or. It is possible to easily return to the first position H11 from the predetermined position.

According to the washing water tank device 104 according to the second embodiment of the present invention described above, the washing water tank device 104 further includes a speed reducing unit 174 that slows down the flow velocity of the washing water discharged from the second drainage unit 114n. As a result, the flow velocity of the washing water discharged from the second drainage unit 114n can be slowed down. For example, the washing water discharged from the second drainage unit 114n can be discharged from the water storage tank 10 from above the water surface. Even if it is discharged inside, it is possible to suppress the scattering of the washing water.

Next, the flush toilet device according to the third embodiment of the present invention will be described with reference to FIGS. 21 to 28.
The flush toilet device 201 according to the third embodiment has substantially the same structure as the flush toilet device according to the second embodiment described above, and thus is different from the second embodiment of the third embodiment of the present invention. However, the same parts as those in the first embodiment and the second embodiment will be described using the same reference numerals in the drawings or the specification, or the description of the same parts will be omitted.

As shown in FIG. 21, the flush toilet device 201 according to the third embodiment of the present invention has a flush water tank device 204 according to the third embodiment of the present invention mounted on the rear portion of the flush toilet main body 2. There is. The washing water tank device 204 according to the present embodiment discharges the washing water stored inside to the water washing toilet main body 2 based on the instruction signal from the remote control device 6 or the motion sensor 8, and the washing water is used to discharge the washing water to the bowl portion. It is configured to wash 2a.

The washing water tank device 204 includes a drain valve hydraulic drive unit 214, which is a drain valve pull-up unit that pulls up the drain valve 12. Further, the washing water tank device 204 has a first control valve 16 which is a water supply control device for controlling water supply to the drain valve hydraulic drive unit 214 from the water supply.

In the washing water tank device 204, the drain valve 12 and the drain valve hydraulic drive unit 214 are further connected, the drain valve 12 is pulled up by the drain valve hydraulic drive unit 214, and the drain valve 12 is cut at a predetermined timing to lower the drain valve 12. It has a clutch mechanism 130 for making the water pressure. Since the clutch mechanism 130 of the third embodiment is the same as the clutch mechanism 130 of the second embodiment, the description thereof will be omitted.

The drain valve 12 is pulled up by the driving force of the drain valve hydraulic drive unit 214, the clutch mechanism 130 is disengaged at a predetermined timing when the drain valve 12 is pulled up to a predetermined height, and the drain valve 12 is lowered by its own weight. When the drain valve 12 descends, the drain valve 12 is held by the float device 26 for a predetermined time, and the time until the drain valve 12 sits on the drain port 10a is adjusted.

Next, the drain valve hydraulic pressure drive unit 214 will be described with reference to FIGS. 21 to 28.
As shown in FIG. 21 and the like, the drain valve hydraulic pressure drive unit 214 is configured to drive the drain valve 12 by utilizing the supply water pressure of the washing water supplied from the water supply. The structure of the drain valve hydraulic drive unit 214 of the third embodiment is basically the same as that of the structure other than the first rod 132 of the drain valve hydraulic drive unit 114 of the second embodiment. The same reference numerals are used in the drawings for various parts, and the description thereof will be omitted.

The drain valve hydraulic drive unit 214 includes a first rod 232 extending from the piston 128 through the first through hole portion 114f formed in the cylinder 114a. Since the cylinder 114a in the third embodiment has substantially the same structure as the cylinder 114a in the second embodiment, the description thereof will be omitted.

The first rod 232 is a rod-shaped member connected to the inlet side surface of the piston 128. The first rod 232 extends from the piston 128 toward the pressure chamber 114b on the inlet side 114l side, and extends outward through the first through hole portion 114f on the side wall on the inlet portion side. The first rod 232 extends into the drive section drainage channel 134b extending from the first through hole portion 114f. The proximal end of the first rod 232 is connected to the piston 128, and the distal end of the first rod 232 is configured to be located inside the drive drainage channel 134b. The first rod 232 is a rod extending toward the opposite side of the second rod 133, which is an operating rod for the clutch mechanism 130 extending from the piston 128 toward the clutch mechanism 130. The rod extending from the piston 128 through the through hole formed in the cylinder 114a is not necessarily limited to the first rod 232 and the second rod 133, and the first rod 232 and the second rod 133 are one. It may be formed as a rod.

As shown in FIG. 22, the drain valve hydraulic drive unit 214 is provided separately from the inlet portion 114l, and is provided separately from the first drain portion 214m and the first drain portion 214m for discharging the washing water from the inside of the cylinder 114a. It also includes a first rod 232 and a second drainage portion 214n formed between the piston 128 and the first through hole portion 114f.

The first drainage section 214m extends into the drive section drainage channel 134b. The distal end of the first drainage portion 214m forms an outflow hole to the drive portion drainage channel 134b. In the first drainage portion 214m, the first drainage path inlet 270a of the first drainage path 270 for draining the washing water from the inside of the cylinder 114a to the outside of the cylinder 114a is opened and closed by the first rod 232 and the first through hole portion 114f. Is formed in. As shown in FIGS. 21 and 24, when the piston 128 is located at the first position H11, the first drainage portion 214m has a first drainage path 270 due to the first rod 232 and the first through hole portion 114f. The first discharge path inlet 270a is closed and the first discharge path 270 is closed. As shown in FIG. 22 and the like, when and when the piston 128 reaches the communication position (for example, a predetermined position further behind the clutch mechanism disconnection position) between the first position H11 and the second position H12. Then, when it is located further back, the first discharge path inlet 270a of the first discharge path 270 is opened by the first rod 232 and the first through hole portion 114f, and the first discharge path 270 is opened. It is configured to be. The first drainage unit 214m has a switching function such as a switching valve between the closed state and the open state of the first drainage path 270. The first drainage portion 214m has a function of forming a main drainage path for the washing water from the cylinder 114a. Further, the first drainage portion 214m has a function of forming a main water supply path for washing water to the water storage tank 10.

As shown in FIG. 22 and the like, in the first discharge path 270 of the first drainage portion 214 m, a groove portion formed so as to cut out the side portion of the first rod 232 inward is formed on the outer surface portion of the first rod 232. It is formed by extending from the first discharge path start position 232a to the distal end 232b of the first rod 232. The first discharge path start position 232a is located at a position away from the proximal end on the piston side. The first discharge path start position 232a is the first discharge path start position of the first rod 232 that appears in the cylinder 114a so as to correspond to the communication position of the piston 128 (the fourth position H14 where the communication flow path is formed). .. The first discharge path 270 forms a channel having a fan-shaped cross section. The first discharge path 270 is formed on the outer surface side of the first rod 232 and also forms a flow path between the first rod 232 and the first through hole portion 114f. The first discharge path inlet 270a of the first discharge path 270 is the first when the groove portion of the first discharge path 270 is located inside the cylinder from the first through hole portion 114f due to the movement of the first rod 232. 1 The groove portion of the discharge path 270 is formed by opening laterally inside the cylinder from the first through hole portion 114f. As shown in FIG. 23, the first discharge paths 270 are formed at four locations along the outer periphery of the first rod 232 in the front view seen from the drive unit drainage channel 134b side along the axial direction of the first rod 232. Has been done. The central angle of the fan shape of the cross section of the second discharge path 272 is set to about 72 degrees. The four first drainage paths 270 are similarly formed from the first drainage path start position 232a to the distal end. The distance from the connection portion of the first rod 232 with the piston 128 to the first discharge path start position 232a, in other words, the distance from the first position H11 to the fourth position H14 is, for example, the piston 128 in the cylinder 114a. The distance is more than two-thirds of the movable distance of.

The second drainage portion 214n is formed between the first rod 232 and the first through hole portion 114f and between the piston 128 and the first through hole portion 114f. The second drainage section 214n communicates the pressure chamber 114b on the inlet side of the drainage valve hydraulic drive section 214 with the space inside the water storage tank 10. The second drainage portion 214n forms a second drainage path 272 from the cylinder 114a. The second discharge path 272 is formed, for example, by a slight gap between the outer surface of the first rod 232 and the first through hole portion 114f. The second discharge path 272 further comprises, for example, a groove 272a formed so as to inwardly cut out the side portion of the first rod 232 from the proximal end 232c of the first rod 232 to the distal end 232b. May be good. The groove portion 272a of the second discharge path 272 forms a flow path having a fan-shaped cross section. Therefore, when the piston 128 is located at the first position H11, the second discharge path 272 of the second drainage portion 214n is in the open state. The second discharge path 272 is always open regardless of the position of the piston 128. A part of the washing water flowing into the cylinder 114a flows out from the second drainage portion 214n in the gap between the first rod 232 and the first through hole portion 114f. The washing water flowing out from the second drainage unit 214n flows into the water storage tank 10. Since the second drainage portion 214n is relatively narrow and has a large flow path resistance, the wash water flowing into the cylinder 114a from the drive portion water supply channel 34a even when the wash water flows out from the second drainage portion 214n. As a result, the pressure in the cylinder 114a rises, and the piston 128 is pushed up against the urging force of the spring 48.

The minimum cross-sectional area of the second drainage path 272 of the second drainage section 214n is smaller than the minimum cross-sectional area of the first drainage path 270 of the first drainage section 214m. The minimum value of the cross-sectional area of the second drainage path 272 of the second drainage section 214n is less than half of the minimum value of the cross-sectional area of the first drainage path 270 of the first drainage section 214m, and the second drainage section 214n is the second drainage section 214n. An auxiliary drainage channel is formed for one drainage portion 214 m.
As shown in FIG. 23, the second discharge path 272 is formed at one place along the outer periphery of the first rod 232 in the front view seen from the drive unit drainage channel 134b side along the axial direction of the first rod 232. Has been done. The central angle of the fan shape in the cross section of the second discharge path 272 is about 72 degrees.

As shown in FIG. 22, the bank portion 114h extends to the first position H11 in the portion corresponding to the second discharge path 272, but has a shorter length in the portion corresponding to the first discharge path 270. It is formed. Even with such a bank portion 114h and the first rod 232, the second discharge path 272 of the second drainage portion 214n has the top 114k and the lower surface portion of the bank portion 114h in a state where the piston 128 is at the first position H11. Between the first flow path 114o extending laterally with respect to the lower surface portion 128c between the 128c and the inner wall of the first rod 232 and the first through hole portion 114f with the piston 128 at the first position H11. A third flow path 114r extending laterally is provided. The third flow path 114r forms a flow path between the outer surface of the portion other than the groove portion 272a of the first rod 232 and the inner wall of the first through hole portion 114f. The third flow path 114r may include a groove portion 272a or a flow path between the groove portion 272a and the inner wall of the first through hole portion 114f.

The shape of the second drainage portion 214n is changed according to the movement of the piston 128. Therefore, the total value of the cross-sectional area of the flow path in the second drainage portion 214n and the minimum value of the cross-sectional area are changed according to the movement of the piston 128. As the piston 128 is moved from the first position H11 to the second position H12, the total cross-sectional area of the second discharge path 272 in the second drainage portion 214n and the minimum cross-sectional area are increased, and the second The second drainage portion 214n is formed so as to reduce the pressure loss of the drainage portion 214n. For example, as the piston 128 is moved from the first position H11 to the second position H12, the cross-sectional area of the smallest flow path in the second drainage portion 214n is increased. For example, the minimum cross-sectional area of the flow path is the minimum cross-sectional area of the second discharge path 272 between the top 114k of the bank 114h and the bottom surface 128c of the piston 128. As the piston 128 is moved from the first position H11 to the second position H12, the minimum cross-sectional area of the flow path of the second discharge path 272 also increases.

When the outer diameter of the distal end side portion of the first rod 232 is formed smaller than the outer diameter of the proximal end side portion, the piston 128 and the first rod 232 are on the second position side. By moving to, the cross-sectional area of the second discharge path 272 between the first rod 232 and the inner wall of the first through-hole portion 114f, for example, the total value and the minimum value of the cross-sectional area is increased, and the second drainage portion 214n The second drainage portion 214n is formed so that the pressure loss is reduced. At this time, the minimum value of the cross-sectional area of the second discharge path 272 when the piston 128 is at the first position H11 (the first rod 32 and the first through hole as shown in FIG. 7 for the second drainage portion 14n). The cross-sectional area of the second drainage path 272 of the second drainage section 214n so as to correspond to the drainage path between the inner wall of the portion 14f) is the first rod 232 and the first rod 232 when the piston 128 is in the second position H12. 1 It is smaller than the minimum value of the cross-sectional area of the flow path between the through hole portion 114f and the inner wall.

Next, a series of washing operations of the washing water tank device 204 according to the third embodiment of the present invention and the flush toilet device 201 provided with the washing water tank device 204 will be described with reference to FIGS. 21 to 28 and the like. Since the cleaning operation of the cleaning water tank device 204 and the like in the third embodiment is almost the same as the cleaning operation of the cleaning water tank device 104 and the like in the second embodiment, the description of the first drainage unit 214m and the second drainage unit 214n The description of the overlapping portion will be omitted with reference to the description of the second embodiment.

As shown in FIGS. 21 and 24, when the piston 128 is located at the first position H11, the first of the first drainage path 270 of the first drainage portion 214m by the first rod 232 and the first through hole portion 114f. The discharge path inlet 270a is closed, and the first discharge path 270 is closed. When the piston 128 is located at the first position H11, the first discharge path inlet 270a of the first discharge path 270 of the first rod 232 is located closer to the drive section drainage channel 134b than the top 114k of the bank portion 114h. .. When the piston 128 is located at the first position H11, the second drainage portion 214n is formed between the first rod 232 and the piston 128 and the first through hole portion 114f. That is, in the standby state, the second discharge path 272 formed between the first rod 232 and the first through hole portion 114f is in the open state. As a result, as shown in FIG. 25, when the washing water flows into the cylinder 114a, a part of the washing water is drained from the second discharge path 272 of the second drainage part 214n as shown by the arrow F21. It is designed to flow out to the road 134b side.

Next, when the instruction signal for cleaning the toilet bowl is received and the first control valve 16 is opened, the cleaning water flowing from the water supply pipe 38 is discharged through the first control valve 16 to the drain valve hydraulic drive unit 214. Is supplied to. As a result, the piston 128 of the drain valve hydraulic drive unit 214 is pushed up, and the operating portion 133a of the second rod 133 is advanced toward the passive portion 176.

As shown in FIG. 25, when the piston 128 and the second rod 133 move toward the second position H12, the operating portion 133a abuts on the first plane 176a of the passive portion 176, and the passive portion 176 and the first support The body 180 is pushed forward while contracting the elastic member 182 for the support. As a result, the connecting member 188 connected to the first support 180 is pulled up, and the drain valve 12 is pulled up by the connecting member 188. Therefore, when the drain valve 12 is pulled up, the washing water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet body 2.

It is formed between the first rod 232 and the first through hole portion 114f until the clutch mechanism 130 is disengaged while the piston 128 is moved from the first position H11 to the second position H12. The second discharge path 272 is open. As a result, as shown by the arrow F21, a part of the washing water flowing into the cylinder 114a flows out from the second discharge path 272 of the second drainage section 214n to the drive section drainage channel 134b side. Since the outflow of wash water from the second discharge path 272 is relatively small, the piston 128 is pushed toward the second position H12 as planned. On the other hand, the first discharge path inlet 270a of the first discharge path 270 is closed by the first rod 232 and the first through hole portion 114f, and the first discharge path 270 of the first drainage section 214m is closed. There is.

Next, as shown in FIG. 26, when the passive portion 176 is further advanced and pressed toward the regulating portion 186, the contact between the second rod 133 and the passive portion 176 is disengaged, and the clutch mechanism 130 is engaged. It will be released. That is, when the drain valve 12 reaches a predetermined height, the passive portion 176 of the clutch mechanism 130 hits the regulating portion 186, and the clutch mechanism 130 is disengaged. Even after the clutch mechanism 130 is disengaged, the first discharge path 270 of the first drainage portion 214 m is in a closed state until the first discharge path inlet 270a is opened, and as shown by the arrow F22, the washing water is in a closed state. A part of the second drainage section 214n flows out from the second discharge path 272 to the drive section drainage channel 134b side.

As shown in FIG. 27, the piston 128 and the first rod 232 are further pushed forward to reach the second position H12. In this process, when the piston 128 is advanced to the communication position of the piston 128 (the fourth position H14 of the piston 128 in which the communication flow path is formed), the first appearing in the cylinder 114a corresponding to the communication position of the piston 128. The first discharge path inlet 270a is opened from the first discharge path start position 232a of the rod 232. The fourth position H14 is located at a position deeper than the disengagement position where the clutch mechanism 130 is disengaged and slightly closer to the inlet side (front side) than the second position H12. When the first discharge path inlet 270a of the first discharge path 270 is opened by the first rod 232 and the first through hole portion 114f, the first discharge path 270 of the first drainage section 214m is opened. As a result, as shown by the arrow F23, the washing water is discharged from the first discharge path 270 to the drive section drainage channel 134b, and the wash water is used as the main water supply from the discharge section at the downstream end of the drive section drainage channel 134b into the water storage tank 10. Is discharged to. At this time, as shown by the arrow F24, a part of the washing water also flows out from the second drainage path 272 of the second drainage section 214n to the drive section drainage channel 134b side.

On the other hand, since the pilot valve 16e is opened, the valve open state of the first control valve 16 is maintained, and the water supply to the water storage tank 10 is continued. Further, when the water level in the water storage tank 10 drops to the predetermined water level WL1, the float portion 26a of the float device 26 descends, which moves the engaging portion 26b. As a result, the engagement between the valve shaft frame body 12a and the engaging portion 26b is released, and the valve shaft frame body 12a and the drain valve 12 begin to descend again.

As a result, the drain valve 12 is seated on the drain port 10a, and the drain port 10a is closed. Since the float switch 42 is still in the off state, the valve open state of the first control valve 16 is maintained, and water supply to the water storage tank 10 is continued. The wash water supplied via the drive unit drainage channel 134b reaches the drainage channel branch portion 134c, a part of the wash water branched at the drainage channel branch portion 134c flows into the overflow pipe 10b, and the rest is a water storage tank 10. It is stored inside. The wash water that has flowed into the overflow pipe 10b flows into the flush toilet body 2 and is used for refilling the bowl portion 2a. On the other hand, with the drain valve 12 closed, the water level in the water storage tank 10 rises due to the washing water flowing into the water storage tank 10.

As shown in FIG. 28, after the first control valve 16 is closed and the water supply to the drain valve hydraulic drive unit 214 is stopped, the washing water in the cylinder 114a of the drain valve hydraulic drive unit 214 is gradually first. Along with flowing out from the drainage portion 214m and the second drainage portion 214n, the piston 128 is pushed down by the urging force of the spring 48 and returns to the first position H11. After the first discharge path inlet 270a is closed with the return of the piston 128 to the first position H11, the washing water in the cylinder is driven from the second discharge path 272 as shown by the arrow F25. It flows out to the drainage channel 134b side. Therefore, as shown in FIG. 21, the device in the water storage tank 10 is in a state of returning to the standby state.

According to the washing water tank device 204 according to the third embodiment of the present invention described above, the drain valve hydraulic drive unit 114 is formed in the cylinder 114a and is separate from the inlet portion 114l and the inlet portion 114l into which the washing water flows. A second drainage portion 214m, which is provided and discharges washing water from the inside of the cylinder 114a, and a second drainage portion 214m, which is provided separately from the first drainage portion 214m and is formed between the first rod 232 and the first through hole portion 114f. It is provided with a drainage unit 214n. As a result, the flow pressure of the washing water to the cylinder 114a suddenly rises in a state where the flow path from the inlet portion 114l in the cylinder 114a to the first drainage portion 214m is not communicated or is communicated. In this case, the second drainage portion 214n can soften the impact of abrupt fluctuations in the water pressure of the washing water, can cushion the impact received by the washing water on the piston 128, and can prevent the operation of the piston 128 from becoming unstable.

According to the washing water tank device 204 according to the third embodiment of the present invention described above, the first discharge path 270 of the first drainage portion 214m is relatively easily formed by the groove portion formed on the outer surface portion of the first rod 232. When the piston 128 is located at the first position H11, the water supply pressure of the washing water does not escape to the first discharge path 270 side, and the water supply pressure of the washing water is effectively used for the movement of the piston 128. When the piston 128 is in the communication position, the first discharge path 270 is opened, the washing water is discharged from the inside of the cylinder 114a to the outside of the cylinder through the first discharge path 270, and the piston 128 is the second. It is possible to easily return to the first position H11 from the position H12 or the predetermined position.

In the drain valve hydraulic drive unit 214 according to the second embodiment of the present invention described above, as an example, the second discharge path 172 is slightly between the outer surface of the first rod 132 and the first through hole portion 114f, for example. Although the form formed by the gaps has been described, the form is not limited to such a form, and as a modification, as shown in FIG. 29, the second discharge path 172 of the second drainage portion 114n further includes a first rod. An internal passage 172c extending inside the first rod 132 may be formed from the second discharge path inlet 172b that opens on the side surface of the 132. By providing the second discharge path 172 with the internal passage 172c, the discharge amount can be further stabilized. Such an internal passage 172c may be connected to the first discharge path 170 in the second embodiment. The minimum value of the flow path cross-sectional area at the second discharge path inlet 172b and the internal passage 172c is smaller than the minimum value of the flow path cross-sectional area at the internal passages of the first discharge path inlet 170a and the first discharge path 170.

1 Washing toilet device 4 Washing water tank device 10 Water storage tank 10a Drain port 12 Drain valve 14 Drain valve Hydraulic drive unit 14a Cylinder 14f Through hole 14h Embankment 14i Inner wall 14k Top 14l Inlet 14m 1st drain 14n 2nd drain 14o 1st flow path 14p Outer wall part 14q 2nd flow path 14s Rectifying part 28 Piston 30 Clutch mechanism 32 Rod D1 Outer diameter D2 Inner diameter F1 Cross-sectional area G1 Central axis G2 Central axis G3 Central axis H1 First position H2 Second position R1 inner diameter R2 inner diameter

Claims (17)

A washing water tank device that supplies washing water to a flush toilet.
A water storage tank in which the washing water to be supplied to the flush toilet is stored and a drain port for discharging the stored washing water to the flush toilet is formed.
A drain valve that opens and closes the drain port to supply and stop flush water to the flush toilet,
A drain valve hydraulic pressure drive unit that drives the drain valve by using the supply pressure of the supplied tap water is provided.
The drain valve hydraulic drive unit
The cylinder to which the above tap water is supplied as washing water,
A piston that is slidably arranged in the cylinder and is moved from the first position to the second position by the washing water flowing into the cylinder.
A rod extending from the piston through a through hole formed in the cylinder,
An elastic member provided on the piston and having a sealing function between the piston and the inner wall of the cylinder,
The inlet that is formed in the cylinder and into which the washing water flows in,
A first drainage section, which is provided separately from the inlet section and discharges wash water from the inside of the cylinder,
A washing water tank device provided separately from the first drainage portion and provided with a second drainage portion formed between the rod and the piston and the through hole portion. The washing water tank device according to claim 1, wherein the first drainage unit is formed in the cylinder. The first drainage portion is formed so that the inlet of the first drainage path for draining the washing water from the inside of the cylinder to the outside of the cylinder is opened and closed by the rod and the through hole portion.
In the first drainage section, when the piston is located at the first position, the inlet of the first drainage path is closed by the rod and the through hole portion, and the first drainage path is closed. Further, when the piston reaches the communication position between the first position and the second position, the rod and the through hole portion of the first discharge path. The washing water tank device according to claim 1, wherein the inlet is opened and the first discharge path is opened. The first drainage path of the first drainage portion is inside the rod from the first drainage path start position of the rod appearing in the cylinder so as to correspond to the communication position of the piston to the distal end of the rod. The wash water tank device according to claim 3, which is formed by a passage extending in the water tank device. The first drainage path of the first drainage portion is distal to the rod from the first drainage path start position of the rod that appears in the cylinder so as to correspond to the communication position of the piston on the outer surface portion of the rod. The washing water tank device according to claim 3, which is formed by a groove formed to the end. The amount of deformation of the elastic member when the piston is in the first position is the amount of deformation of the elastic member at each position while the piston is moved from the first position to the second position. The washing water tank device according to any one of claims 1 to 5, which has the maximum deformation amount. The washing water tank device according to claim 6, wherein the inner diameter of the cylinder of the portion corresponding to the first position of the piston is the smallest inner diameter of the inner diameter of the cylinder. The washing water tank device according to claim 6 or 7, wherein the drain valve hydraulic drive unit further includes an urging member provided in the cylinder and urging the piston toward the first position side. .. As the piston is moved from the first position to the second position, the cross-sectional area of the flow path in the second drainage portion is increased, and the pressure loss of the second drainage portion is reduced. 2. The washing water tank device according to any one of claims 1 to 8, wherein a drainage portion is formed. As the piston is moved from the first position to the second position, the cross-sectional area of the flow path between the rod of the second drainage portion and the inner wall of the through hole portion is increased, and the cross-sectional area of the flow path is increased. 2. The washing water tank device according to claim 9, wherein the second drainage portion is formed so as to reduce the pressure loss of the drainage portion. The through hole portion of the cylinder includes a bank portion that rises from a peripheral portion of the through hole at the bottom of the cylinder toward the inside of the cylinder.
The washing water according to claim 9 or 10, wherein the second drainage portion includes a first flow path extending between the top of the bank portion and the piston in a state where the piston is in the first position. Tank device. Further, the drain valve and the drain valve hydraulic drive unit are connected to each other, and the drain valve hydraulic drive unit pulls up the drain valve and is cut at a predetermined timing to lower the drain valve.
The cross-sectional area of the flow path of the second drainage portion when the clutch mechanism is disengaged is the second drainage portion at each position while the piston is moved from the first position to the second position. The washing water tank device according to any one of claims 9 to 11, which is the largest cross-sectional area of the flow path among the cross-sectional areas of the flow paths. The washing water tank device according to any one of claims 1 to 12, wherein the central axis of the rod and the central axis of the through hole are located on the same axis as the central axis of the cylinder. The one according to any one of claims 1 to 13, further comprising a rectifying portion formed at the top of the through hole portion so that the diameter of the inner wall becomes constant along the moving direction of the rod. Washing water tank device. The washing water tank device according to any one of claims 1 to 14, wherein the maximum outer diameter of the outer diameter of the rod is smaller than the minimum inner diameter of the inner diameter of the through hole portion. The washing water tank device according to any one of claims 1 to 15, further comprising a decelerating part for reducing the flow velocity of the washing water discharged from the second drainage part. It ’s a flush toilet device,
The washing water tank device according to any one of claims 1 to 16.
The flush toilet that is washed with the wash water supplied from this wash water tank device,
A flush toilet device characterized by having.

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