JP2022043734A - Washing water tank device, and toilet bowl system including the same - Google Patents

Abstract

To provide a washing water tank device capable of easily reducing the pressure of washing water in a pressure chamber, and a toilet bowl system including the same.SOLUTION: A drain valve hydraulic drive unit 14 of a washing water tank device includes: a cylinder 14a; a piston 14b movably placed in the cylinder, where the piston partitions the inside of the cylinder into a pressure chamber 14g and a back pressure chamber 14h, and further the piston is moved from a first position H1 to a second position H2 due to the pressure of the wash water flowing into the pressure chamber; a communication mechanism 46 that forms a piston internal flow path 52 communicating the pressure chamber and the back pressure chamber in a state that the piston is positioned at the second position; and a connection unit 14o that is provided to the end side of the cylinder 14a with respect to the second position of the piston extending from an outlet that drains the wash water in the cylinder and connected to an outflow pipe.SELECTED DRAWING: Figure 3

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 a low tank device. This low tank device includes a hydraulic cylinder device, and is configured to operate the hydraulic cylinder device by the hydraulic pressure of the supplied water and open the drain valve of the low tank. In this low tank device, the supply and stop of water to the hydraulic cylinder device are controlled by the solenoid valve, and the opening and closing of the drain valve is controlled based on the operation of the solenoid valve. That is, when the supplied water flows into the hydraulic cylinder device by operating the solenoid valve, the piston in the hydraulic cylinder device is pushed up, and the drain valve is pulled up by the rise of this piston, and the drain valve is opened. To. Further, when the supply of water to the penstock is stopped by the solenoid valve, the piston is gradually lowered and the drain valve is closed as the water in the penstock is gradually discharged from the drainage portion. Be spoken.

Japanese Unexamined Patent Publication No. 2009-25761

However, in the low tank device as shown in Patent Document 1, after pushing up the piston in the penstock, the water in the penstock is gradually discharged from the drainage portion, and the piston is gradually lowered accordingly. do. At this time, there is a problem that it takes time for the water in the hydraulic cylinder device to flow out from the drainage portion and it takes time for the piston to descend. When it takes time to lower the piston, there is a problem that it takes time to close the drain valve and it takes a relatively long time to complete one cleaning operation. If the water in the hydraulic cylinder device is to be drained quickly, it is necessary to provide an additional solenoid valve to control the outflow of water in the hydraulic cylinder device, which causes a problem of increasing the size of the device.

Therefore, an object of the present invention is to provide a washing water tank device capable of easily reducing the pressure of washing water in a pressure chamber, and a flush toilet device provided with the washing water tank device.

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. The drain valve hydraulic drive unit that drives the drain valve by utilizing the water supply pressure is provided, and the drain valve hydraulic drive unit slides into the cylinder into which the supplied washing water flows and the cylinder. A piston that can be arranged, the piston divides the inside of the cylinder into a pressure chamber and a back pressure chamber, and the piston is further divided from the first position by the pressure of the washing water flowing into the pressure chamber. A communication mechanism that forms a piston internal flow path that connects the pressure chamber and the back pressure chamber with the piston moved to the second position and the piston in the second position, and the above-mentioned communication mechanism. It is characterized in that it is provided on the end side of the cylinder with respect to the second position of the piston, and is provided with a connection portion extending from the outlet for draining the washing water in the cylinder and to which the outflow pipe is connected. ..
According to one embodiment of the present invention configured as described above, the drain valve hydraulic drive unit is a piston that communicates the pressure chamber and the back pressure chamber with the piston in the second position. A communication mechanism that forms an internal flow path and a communication mechanism that is provided on the end side of the cylinder from the second position of the piston, extends from a drain port that allows the washing water in the cylinder to flow out, and is connected to a drain pipe. It has a connection part. As a result, with a relatively simple configuration, the wash water in the pressure chamber can be easily discharged to the back pressure chamber and the connection portion in the state where the piston is in the second position, and the pressure of the wash water in the pressure chamber can be easily reduced. , The piston can easily return from the second position to the first position side, and the connection part is compared with the case where the outlet of the base part of the connection part is formed on the first position side rather than the second position. When the outlet of the base of the piston is provided on the end side of the cylinder from the second position, the flow of the washing water toward the outlet is less likely to hinder the sliding of the piston, and the stability of the sliding operation of the piston is improved. Can be improved.

In one embodiment of the present invention, the cylinder is preferably a cylindrical first member that opens toward the end side of the cylinder and a tubular second member that connects to the first member. The second member includes the second member that forms a lid portion that covers the opening of the first member, and the connection portion extending from the outlet is provided on the side wall of the second member.
According to one embodiment of the present invention configured as described above, the cylinder has a tubular first member that opens toward the end side of the cylinder and a tubular second member that connects to the first member. The second member includes the second member, which forms a lid portion that covers the opening of the first member. As a result, the cylinder can be relatively easily configured by using two parts, the first member and the second member, and the connection portion extending from the outlet is provided on the side wall of the second member, so that the cylinder can be formed. It is possible to improve the handling of the drainage pipe connected to the connection part while maintaining the low silhouette with the height suppressed.

In one embodiment of the present invention, a mounting structure of the second member and the first member is preferably formed so that the connection portion is provided in a direction selected from a plurality of types of directions.
According to one embodiment of the present invention configured in this way, the mounting structure of the second member and the first member is provided so that the connection portion is provided in a direction selected from a plurality of types of directions. It is formed. As a result, the positions of the connection portion and the outflow pipe connected to the connection portion can be set relatively freely according to the layout of the equipment in the water storage tank, and the degree of freedom in the layout of the parts in the water storage tank can be improved.

In one embodiment of the present invention, preferably, the second member is a protrusion that comes into contact with the piston and restricts the sliding of the piston to the second position, and the protrusion is the protrusion. It is provided with the protrusion formed in the region opposite to the outlet with respect to the central axis of the cylinder.
According to one embodiment of the present invention configured as described above, the second member is a protrusion that comes into contact with the piston and restricts the sliding of the piston to the second position. The portion includes the protrusion portion formed in the region opposite to the outlet with respect to the central axis of the cylinder. As a result, while the cylinder is formed in a low silhouette, the washing water flows from the internal flow path of the piston through the region between the protrusion in the back pressure chamber and the outlet while the piston is slid to the second position. It is possible to secure a space that flows to the outlet. Therefore, while the cylinder is formed in a low silhouette, the washing water can be smoothly flowed out from the pressure chamber to the outflow port through the back pressure chamber.

Further, one embodiment of the present invention is a flush toilet device, characterized in that it has a flush toilet device and a wash water tank device capable of easily reducing the pressure of the wash water in the pressure chamber.

According to the present invention, it is possible to provide a washing water tank device capable of easily reducing the pressure of washing water in a pressure chamber, and a flush toilet device including the washing 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 sectional drawing of the hydraulic drive part and the drain valve provided in the washing water tank apparatus by 1st Embodiment of this invention. It is sectional drawing which follows the IV-IV line of FIG. 3 in the washing water tank apparatus according to 1st Embodiment of this invention. It is an exploded perspective view which shows by disassembling the component constituting the clutch mechanism provided in the washing water tank device according to 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state of the clutch mechanism when the drain valve is closed in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state of the clutch mechanism at the time of disconnection in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state of the clutch mechanism just before connection in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state at the time of connecting a clutch mechanism in the washing water tank apparatus by 1st Embodiment of this invention. It is sectional drawing of the drainage / vacuum break valve provided in the washing water tank apparatus according to 1st Embodiment of this invention, and shows the state which water supply is not performed from a water supply control apparatus. It is sectional drawing of the drainage / vacuum break valve provided in the washing water tank apparatus according to 1st Embodiment of this invention, and shows the state which water supply is performed from a water supply control apparatus. In the washing water tank device according to the first embodiment of the present invention, the displacement and height position of the piston, the state of cylinder water supply, the state of the clutch mechanism, the state of the internal flow path of the piston, and the state of drainage from the drain / vacuum break valve. It is a timing chart which shows the time change such as. It is a partially enlarged sectional view which shows the state in which the piston is in the process of rising in the hydraulic drive part in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state just before the clutch mechanism is disengaged in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state which the piston reached the 2nd position in the hydraulic drive part in the washing water tank apparatus by 1st Embodiment of this invention. It is a partially enlarged sectional view which shows the state which the drain valve is lowered to the valve seat in the washing water tank apparatus by 1st Embodiment of this invention. FIG. 3 is a partially enlarged cross-sectional view showing a state in which the clutch mechanism is reconnected in the washing water tank device according to the first embodiment of the present invention. It is sectional drawing which shows the schematic structure of the washing water tank apparatus by 2nd Embodiment of this invention. It is sectional drawing of the hydraulic drive part and the drain valve provided in the washing water tank apparatus by 2nd Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line XX-XX of FIG. 19 in the washing water tank device according to the second embodiment of the present invention. It is a perspective view of the hydraulic drive part of the washing water tank apparatus by 2nd Embodiment of this invention. FIG. 5 is an exploded perspective view of the hydraulic drive unit of the washing water tank device according to the second embodiment of the present invention, as viewed from diagonally below in a state where the packing, the piston and the valve constituent members are disassembled. FIG. 5 is an exploded perspective view of the hydraulic drive unit of the washing water tank device according to the second embodiment of the present invention, as viewed from diagonally above with the packing, the piston, and the valve constituent members disassembled. Piston opening and valve configuration when the communication valve is open when viewed from above with the packing, piston, valve components and rod in the hydraulic drive unit of the washing water tank device according to the second embodiment of the present invention combined. It is a figure explaining the position of the member side opening and the like. It is sectional drawing seen along the XXV-XXV line of FIG. 24. Piston opening and valve configuration when the communication valve is closed when viewed from above with the packing, piston, valve components and rod in the hydraulic drive unit of the washing water tank device according to the second embodiment of the present invention combined. It is a figure explaining the position of the member side opening and the like. FIG. 6 is a cross-sectional view taken along the line XXVII-XXVII of FIG. 26. It is a partially enlarged sectional view which shows the clutch mechanism which is in the connected state in the washing water tank apparatus by 2nd Embodiment of this invention. It is a partially enlarged sectional view which shows the clutch mechanism which is in the disconnection state in the washing water tank apparatus by 2nd Embodiment of this invention. In the washing water tank device according to the second embodiment of the present invention, the displacement and height position of the piston, the state of the cylinder water supply, the state of the clutch mechanism, the state of the internal flow path of the first piston, and the drainage / drainage from the vacuum break valve. It is a timing chart which shows the time change such as the state of. It is a partially enlarged sectional view which shows the state of the hydraulic drive part at the time when the cylinder water supply is disclosed in the washing water tank apparatus by 2nd Embodiment of this invention. FIG. 3 is a partially enlarged cross-sectional view showing a state in which a piston is being raised in a hydraulically driven portion in the washing water tank device according to the second embodiment of the present invention. FIG. 3 is a partially enlarged cross-sectional view showing a state immediately after the first engaging portion and the second engaging portion start abutting in the hydraulically driven portion in the washing water tank device according to the second embodiment of the present invention. It is a partially enlarged sectional view which shows the state which the piston reached the 2nd position in the hydraulic drive part in the washing water tank apparatus by 2nd Embodiment of this invention. It is a partially enlarged sectional view which shows the state in which the piston is in the process of descending in the hydraulic drive part in the washing water tank apparatus by 2nd Embodiment of this invention. It is a perspective view which shows the modification of the hydraulic drive part in the washing water tank apparatus by 2nd Embodiment of this invention.

Next, a flush water tank device according to the first embodiment of the present invention and a flush toilet device including the same will be described with reference to the accompanying drawings.
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. FIG. 3 is a cross-sectional view of a hydraulic drive unit and a drain valve provided in the washing water tank device according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3 in the 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 comprises a flush toilet main body 2 which is a flush toilet and a flush water tank device 4 mounted on the rear portion of the flush toilet main body 2. I have. After the flush toilet device 1 of the present embodiment is used, the remote control device 6 mounted on the wall surface is operated, or the human sensor 8 which is a human body detection sensor provided on the toilet seat detects the user's leaving. The bowl portion 2a of the flush toilet body 2 is configured to be washed after a lapse of a predetermined time. The washing water tank device 4 according to the present embodiment is configured to supply washing water to the washing toilet body 2 based on an instruction signal from the remote control device 6 or the human sensor 8. More specifically, The washing water stored inside is discharged to the flush toilet body 2, and the washing water is used to wash the bowl portion 2a. In this way, the flush toilet body 2 is washed with the washing water supplied from the washing water tank device 4.
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.

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. It has a water pressure driving unit 14 which is a drainage valve hydraulic driving unit that drives the drainage valve 12 by using the supply pressure of the supplied tap water. Further, the washing water tank device 4 has a water supply control device 18 for controlling water supply into the water pressure drive unit 14 and the water storage tank 10, and a solenoid valve 20 attached to the water supply control device 18 inside the water storage tank 10. Have.

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 water surface of the washing water stored in the water storage tank 10. 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.

Next, the structures of the hydraulic drive unit and the drain valve will be described with reference to FIGS. 2 to 4. FIG. 3 is a cross-sectional view of the hydraulic drive unit 14 and the drain valve 12, and FIG. 4 is a cross-sectional view cut in a direction perpendicular to the cut surface in FIG.
The drain valve 12 is a linearly driven valve body arranged to open and close the drain port 10a, and is composed of a rod-shaped valve shaft 12a and a valve body portion 12b attached to the lower end thereof. The drain valve 12 supplies and stops the washing water to the flush toilet body 2 by opening and closing the drain port 10a. When the drain valve 12 is pulled up in the vertical direction, the drain port 10a is opened, the washing water in the water storage tank 10 is discharged to the flush toilet body 2, and the bowl portion 2a is washed.

The water pressure drive unit 14 is provided above the drain valve 12, and is configured to drive the drain valve 12 by using the water supply pressure of the washing water supplied from the water supply. Specifically, the hydraulic drive unit 14 is slidably arranged in a cylinder 14a into which the washing water supplied from the water supply control device 18 (FIG. 2) via the inflow pipe 24a flows in, and in the cylinder 14a. The piston 14b and the connection portion 14o provided on the end side of the cylinder 14a with respect to the second position H2 of the piston 14b, extending from the drain port for draining the washing water in the cylinder 14a and to which the outflow pipe 24b is connected. Has. Further, a rod 15 which is a driving member is attached to the piston 14b, and the rod 15 projects from the lower end of the cylinder 14a and extends toward the drain valve 12. Further, the rod 15 is arranged so as to be located on the same straight line as the valve shaft 12a rising from the center of the valve body portion 12b of the drain valve 12, and the drain valve 12 and the rod 15 are arranged coaxially.

The piston 14b divides the inside of the cylinder 14a into a pressure chamber 14g on the front side of the piston 14b and a back pressure chamber 14h on the back side of the piston 14b, and the piston 14b is further divided by the pressure of the washing water flowing into the pressure chamber 14g. It is moved from the first position H1 (see FIG. 3) to the second position H2 (see FIG. 15).

Further, a spring 14c is arranged inside the cylinder 14a to urge the piston 14b downward. An annular packing 14e, which is an elastic member, is attached to the outer periphery of the piston 14b, and the packing 14e is formed in an inverted U-shaped cross section with the lower side open. Further, the packing 14e is in contact with the inner wall surface of the cylinder 14a in an elastically deformed state, and watertightness between the inner wall surface of the cylinder 14a and the piston 14b is ensured. Further, a clutch mechanism 22 is provided at the connection portion between the lower end of the rod 15 and the drain valve 12, and the rod 15 and the drain valve 12 are connected by the clutch mechanism 22, and the rod 15 and the drain valve 12 are connected at a predetermined timing. The connection of 12 is released.

The cylinder 14a is a member having a substantially cylindrical shape, the central axis A thereof is arranged in the vertical direction, and the piston 14b is slidably received inside. Further, the cylinder 14a is formed in a tapered shape so that the inner diameter is continuously slightly expanded from the lower end to the upper side.
The cylinder 14a is a cylindrical first member 14l that opens toward the end side of the cylinder 14a and a tubular second member 14n that is connected to the first member 14l, and the second member 14n is a first member. It includes a second member 14n that forms a lid portion that covers the opening of the member 14l. The first member 14l is formed in a cylindrical shape and has a substantially circular bottom. The second member 14n has a substantially circular ceiling portion. The first member 14l and the second member 14n are watertightly connected. Further, as shown in FIG. 3, an inflow pipe 24a, which is a drive unit water supply channel, is connected to the lower end of the first member 14l of the cylinder 14a, and water flowing out from the water supply control device 18 (FIG. 2) flows out. It is designed to flow into the cylinder 14a. Therefore, the piston 14b in the cylinder 14a is pushed up against the urging force of the spring 14c by the water flowing into the cylinder 14a.

An outlet is provided in the second member 14n on the upper part of the cylinder 14a. The connecting portion 14o extends from the outlet of the second member 14n. The connecting portion 14o is provided on the side wall of the second member 14n. The outflow pipe 24b (see FIG. 2), which is an outflow portion, is attached to the connection portion 14o and communicates with the inside of the cylinder 14a via the outlet at the base of the connection portion 14o. The outflow pipe 24b is designed to allow the washing water in the cylinder 14a to flow out. Therefore, when water flows into the cylinder 14a from the inflow pipe 24a connected to the lower part of the cylinder 14a, the piston 14b is moved from the lower part of the cylinder 14a at the first position H1 (see FIG. 3) due to the pressure of the flowing water. It is pushed up to the upper second position H2 (see FIG. 15). Then, the water flowing into the cylinder 14a flows out from the outflow hole through the outflow pipe 24b. That is, the piston 14b is moved from the first position H1 to the second position H2 of the cylinder 14a by the pressure of tap water. The outflow pipe 24b is provided in the cylinder 14a at a position on the back surface side of the piston 14b with respect to the second position H2 of the piston 14b.

The second member 14n and the first member are directed so that the connecting portion 14o is directed to a selected direction among a plurality of types of directions, for example, one of four directions preset with respect to the first member 14l. A mounting structure with 14 liters is formed. With such a mounting structure, the second member 14n is locked to the first member 14l at a plurality of rotated positions. Therefore, the second member 14n can be attached so that the connecting portion 14o faces in a desired direction. When the first member 14l and the second member 14n are fitted and connected so as to be able to achieve such a structure, but the second member 14n is configured so as not to rotate with respect to the first member 14l. The first member 14l and the second member 14n may be connected by welding, joining or the like.

Further, as shown in FIG. 2, an outflow pipe branch portion 24c is provided at the tip end portion of the outflow pipe 24b extending from the cylinder 14a. The outflow pipe 24b branched at the outflow pipe branch portion 24c is configured such that one of the outflow pipes 24b allows water to flow out into the water storage tank 10 and the other allows water to flow out into the overflow pipe 10b. Therefore, a part of the water flowing out from the cylinder 14a 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 tip of the outflow pipe 24b (outflow opening) is located above the predetermined water level L1 and above the overflow water level defined by the height of the top of the overflow pipe 10b. Therefore, the outflow pipe 24b is arranged so that air can always be sucked. Therefore, as will be described later, when the piston 14b returns from the second position H2 to the first position H1 in the cylinder 14a, air can be sucked from the outflow pipe 24b, and the piston 14b becomes smoother. It is easy to move to.

As shown in FIGS. 3 and 4, the rod 15 is a rod-shaped member connected to the piston 14b, and projects downward from the inside of the cylinder 14a through a through hole 14f formed in the bottom surface of the cylinder 14a. It extends like this. Further, the lower end of the rod 15 is connected to the drain valve 12 via the clutch mechanism 22. Therefore, when water flows into the cylinder 14a and the piston 14b is pushed up, the rod 15 connected to the piston 14b lifts the drain valve 12 upward, and the drain valve 12 is opened.

Further, a gap is provided between the rod 15 projecting from below the cylinder 14a and the inner wall of the through hole 14f of the cylinder 14a, and a part of the water flowing into the cylinder 14a flows out from this gap. The water flowing out from the gap flows into the water storage tank 10. It should be noted that this gap has a relatively narrow flow path cross-sectional area and a large flow path resistance. Therefore, even if the water flows out from the gap, if the water force is strong, the pressure in the cylinder 14a rises due to the water flowing from the inflow pipe 24a into the cylinder 14a, and the pressure in the cylinder 14a is resisted. The piston 14b is pushed up.

Further, a clutch mechanism 22 is provided between the rod 15 and the valve shaft 12a of the drain valve 12. The clutch mechanism 22 connects the drain valve 12 and the rod 15 of the hydraulic drive unit 14 and pulls up the drain valve 12 by the driving force of the hydraulic drive unit 14. The clutch mechanism 22 is configured to disconnect the valve shaft 12a of the drain valve 12 from the rod 15 when the drain valve 12 is lifted to a predetermined position. When the clutch mechanism 22 is disengaged, the drain valve 12 is not linked to the movements of the piston 14b and the rod 15, and descends due to gravity while resisting buoyancy.

Further, as shown in FIG. 4, a drain valve float mechanism 26, which is a float mechanism, is provided in the vicinity of the valve shaft 12a of the drain valve 12. The drain valve float mechanism 26 delays closing the drain port 10a by lowering the drain valve 12 after the rod 15 is lifted by a predetermined distance and the drain valve 12 is disconnected by the clutch mechanism 22. It is configured. Specifically, the drain valve float mechanism 26 has a float portion 26a, an engaging portion 26b interlocked with the float portion 26a, and a float shaft 26c connecting the float portion 26a and the engaging portion 26b. The drain valve float mechanism 26 is operated according to the water level in the water storage tank 10. After the clutch mechanism 22 is disengaged, the drain valve float mechanism 26 engages with the drain valve 12 to switch between a holding posture that regulates the descent of the drain valve 12 and a non-holding posture that does not regulate the descent of the drain valve 12. It is configured.

On the other hand, the valve shaft 12a of the drain valve 12 is provided with an engaging protrusion 12c, and when the drain valve 12 is lifted, the engaging protrusion 12c is above the engaging portion 26b of the drain valve float mechanism 26. (Note that FIG. 4 shows a state in which the drain valve 12 is lowered). When the lifted drain valve 12 is disengaged by the clutch mechanism 22, the engaging projection 12c of the descending drain valve 12 engages with the engaging portion 26b to prevent the drain valve 12 from descending. 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 moves the engaging portion 26b to the release position shown by the imaginary line in FIG. Rotate. When the engaging portion 26b is rotated to the disengaging position, the engagement between the engaging portion 26b and the engaging protrusion 112c is disengaged. When the engagement is released, the drain valve 12 descends and sits on the drain port 10a (state shown in FIG. 4). 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.

On the other hand, as shown in FIG. 2, the drainage / vacuum break valve 30 is provided in the inflow pipe 24a between the water supply control device 18 and the hydraulic drive unit 14.
When the water supply control device 18 side in the inflow pipe 24a becomes negative pressure, the drainage / vacuum break valve 30 sucks the outside air into the inflow pipe 24a and prevents the backflow of water from the hydraulic drive unit 14 side. ..

Further, as shown in FIG. 2, the water supply control device 18 is configured to control water supply to the hydraulic drive unit 14 based on the operation of the solenoid valve 20 and to control water supply and stoppage to the water storage tank 10. ing. That is, the water supply control device 18 is connected between the water supply pipe 32 connected to the water supply and the inflow pipe 24a connected to the hydraulic drive unit 14, and is connected to the water supply pipe based on the instruction signal from the controller 28. It controls the supply and stop of the water supplied from 32 to the hydraulic drive unit 14. In the present embodiment, the entire amount of water flowing out of the water supply control device 18 is supplied to the hydraulic drive unit 14 through the inflow pipe 24a. A part of the water supplied to the hydraulic drive unit 14 flows out from the gap between the inner wall of the through hole 14f of the cylinder 14a and the rod 15 and flows into the water storage tank 10. Further, most of the water supplied to the hydraulic drive unit 14 flows out from the cylinder 14a through the outflow pipe 24b, flows into the water storage tank 10 at the outflow pipe branch portion 24c, and is a flush toilet via the overflow pipe 10b. It is branched into a portion that flows into the main body 2.

Further, the water supplied from the tap water is passed through a water stop valve 32a arranged outside the water storage tank 10 and a constant flow valve 32b arranged in the water storage tank 10 on the downstream side of the water stop valve 32a. It is supplied to the water supply control device 18. The water stop valve 32a 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 valve 32b is provided to allow water supplied from the tap water to flow into the water supply control device 18 at a predetermined flow rate, and a constant flow rate of water is supplied to the water supply control device 18 regardless of the installation environment of the flush toilet device 1. It is configured to be supplied to.

Further, a solenoid valve 20 is attached to the water supply control device 18, and water supply from the water supply control device 18 to the hydraulic drive unit 14 is controlled based on the operation of the solenoid valve 20. Specifically, the controller 28 receives signals from the remote control device 6 and the motion sensor 8, and the controller 28 sends an electric signal to the solenoid valve 20 to operate it.

On the other hand, a water supply valve float 34 is also connected to the water supply control device 18, and is configured to set the water storage water level in the water storage tank 10 to a predetermined water level L1. The water supply valve float 34 is arranged in the water storage tank 10, and rises as the water level of the water storage tank 10 rises. When the water level rises to the predetermined water level L1, the water supply from the water supply control device 18 to the water pressure drive unit 14 is stopped. It is configured as follows.

The water supply control device 18 includes a main body 36 to which the water supply pipe 32 and the inflow pipe 24a are connected, a main valve body 38 arranged in the main body 36, and a valve seat 40 on which the main valve body 38 is seated. It has an arm portion 42 rotated by a water supply valve float 34, a float side pilot valve 44 moved by the rotation of the arm portion 42, and a solenoid valve side pilot valve 50.

The main body 36 is a member provided with a connection portion of the water supply pipe 32 at the bottom and a connection portion of the inflow pipe 24a on one side, so that the solenoid valve 20 can be attached to the side surface on the opposite side of the inflow pipe 24a. It is configured. Further, a valve seat 40 is formed inside the main body portion 36, and the valve seat 40 communicates with an inflow pipe 24a connected to the connection portion. Further, a main valve body 38 is arranged inside the main body 36 so as to open and close the valve seat 40, and when the valve is opened, tap water flowing from the water supply pipe 32 passes through the valve seat 40. , It is configured to flow out to the inflow pipe 24a.

The main valve body 38 is a diaphragm-type valve body having a substantially disk shape, and is mounted in the main body portion 36 so as to be able to sit on and off the valve seat 40. Further, in the main body portion 36, a pressure chamber 36a is formed on the opposite side of the valve seat 40 with respect to the main valve body 38. That is, the pressure chamber 36a is defined by the inner wall surface of the main body 36 and the main valve body 38, and when the pressure in the pressure chamber 36a becomes high, the main valve body 38 is pressed against the valve seat 40 by this pressure, and the valve is valved. Sit in the seat 40.

On the other hand, the solenoid valve 20 is attached to the main body 36 and is configured so that the solenoid valve side pilot valve 50 can be moved forward and backward. That is, the solenoid valve side pilot valve 50 is configured to open and close the pilot valve port (not shown) provided in the pressure chamber 36a. Further, the float side pilot valve 44 is configured to open and close the float side pilot valve port (not shown) provided in the pressure chamber 36a.

The water supply valve float 34 is supported by an arm portion 42, and a float side pilot valve 44 is connected to the arm portion 42. Then, when the water level in the water storage tank 10 has risen to the predetermined water level L1, the water supply valve float 34 is pushed upward, and accordingly, the float side pilot valve 44 causes the float side pilot valve port of the pressure chamber 36a (FIG. (Not shown) is closed. On the other hand, when the washing water in the water storage tank 10 is drained and the water level in the water storage tank 10 drops, the water supply valve float 34 moves downward, the float side pilot valve 44 moves, and the float side pilot valve opening opens. Will be done.

With this configuration, the water level in the water storage tank 10 is at the predetermined water level L1, the solenoid valve 20 is not energized, and the pilot valve port (not shown) of the main valve body 38 and the main body are in standby for cleaning the toilet bowl. The float-side pilot valve openings (not shown) of the portion 36 are both closed.

Further, tap water supplied from the water supply pipe 32 flows into the pressure chamber 36a. Here, in a state where the solenoid valve side pilot valve 50 closes the pilot valve port (not shown) and the float side pilot valve 44 closes the float side pilot valve port (not shown), the inflow occurs. The pressure in the pressure chamber 36a rises due to the tap water. When the pressure in the pressure chamber 36a rises in this way, the main valve body 38 is pressed toward the valve seat 40 by this pressure, and the valve seat 40 is closed by the main valve body 38.

On the other hand, when the solenoid valve 20 is energized and the solenoid valve side pilot valve 50 opens the pilot valve port (not shown), the pressure in the pressure chamber 36a is reduced, whereby the main valve body 38 is valved. It is pulled away from the seat 40 and the valve seat 40 is opened. Further, when the water level in the water storage tank 10 is lower than the predetermined water level L1, the water supply valve float 34 is lowered, and the float side pilot valve 44 opens the float side pilot valve port (not shown). As a result, the pressure in the pressure chamber 36a is reduced, and the valve seat 40 is opened. As described above, in a state where either the pilot valve port of the main valve body 38 or the pilot valve port on the float side is opened, the pressure in the pressure chamber 36a is reduced and the valve seat 40 is opened.

Next, the clutch mechanism 22 for connecting the drain valve 12 and the rod 15 will be described with reference to FIGS. 5 to 9.
FIG. 5 is an exploded perspective view showing the parts constituting the clutch mechanism 22 in an exploded manner. FIG. 6 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 when the drain valve 12 is closed. FIG. 7 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 at the time of disconnection. FIG. 8 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 immediately before connection. FIG. 9 is a partially enlarged cross-sectional view showing a state when the clutch mechanism 22 is connected.

First, as shown in FIG. 5, the clutch mechanism 22 includes a lower end portion of the rod 15, an upper end portion of the valve shaft 12a of the drain valve 12, and a movable member 60 attached to the upper end portion. That is, the rod 15 extends downward from the lower surface of the piston 14b of the hydraulic drive unit 14, and the lower end portion of the rod 15 constitutes a part of the clutch mechanism 22. Further, a movable member 60 is rotatably attached to the upper end portion of the valve shaft 12a, and the movable member 60 is engaged with / disengaged from the lower end portion of the rod 15 to engage / disengage the rod 15 and the drain valve 12. Is connected / released.

A thin-walled portion 15a and a pulling upper portion 15b are formed at the lower end portion of the rod 15, and these function as a part of the clutch mechanism 22. On the other hand, a support portion 12d is provided at the upper end portion of the valve shaft 12a of the drain valve 12. The support portion 12d is composed of a pair of bearings formed so as to be open laterally, and both ends of the movable member 60 are rotatably attached.

The thin portion 15a at the lower end of the rod 15 is a portion formed thinner than the upper portion of the rod 15. The pulling upper portion 15b of the rod 15 is a portion formed so as to project horizontally on both sides from the lower end of the thin wall portion 15a, and when the drain valve 12 is pulled up, the pulling upper portion 15b of the rod 15 and the movable member 60 are formed. Engage.

The movable member 60 includes a base plate 62 extending laterally, a pair of rotating shafts 66 extending outward from both ends of the base plate 62, a pair of arms 64 rising vertically from both sides of the base plate 62, and an upper end of each arm 64. It has a contact portion 68 extending inward from the surface. Each rotation shaft 66 of the movable member 60 is received by each support portion 12d provided at the upper end portion of the valve shaft 12a, and the movable member 60 is rotatably supported.

The base plate 62 is a plate-shaped portion extending laterally, and is formed in a T shape when viewed from above. The arms 64 are formed so as to rise upward from both ends of the T-shaped base plate 62. When the clutch mechanism 22 is connected, the thin portion 15a at the lower end of the rod 15 and the pulling upper portion 15b are located between the pair of arms 64. The rotating shaft 66 is formed so as to project horizontally from both the left and right ends of the base plate 62 and the base end of each arm 64, and is received by each support portion 12d of the valve shaft 12a.

The contact portion 68 is formed so as to project inward from the upper end of each arm 64. The contact portion 68 has a teardrop-shaped cross section and an arc-shaped curved surface on the lower side when viewed from a direction parallel to the rotation axis 66. Further, when the clutch mechanism 22 is connected, the thin portion 15a at the lower end of the rod 15 is located between the contact portions 68, and both ends of the pulling upper portion 15b are located below the contact portions 68.

Next, the operation of the clutch mechanism 22 will be described with reference to FIGS. 6 to 9.
First, in a state where the drain valve 12 is seated on the drain port 10a and the clutch mechanism 22 is connected, the movable member 60 is in the “engagement position” shown in FIG. When the movable member 60 is arranged at the engaging position, the pulling upper portion 15b at the lower end of the rod 15 is located directly below the contact portion 68 of the movable member 60. When the washing water is supplied to the hydraulic drive unit 14 (FIG. 2) and the rod 15 is pulled upward from the state shown in FIG. 6, the drain valve 12 is pulled vertically upward by the rod 15. That is, when the rod 15 is pulled up, the upper surface 15c of the pulling upper portion 15b of the rod 15 and the lower end of the contact portion 68 of the movable member 60 engage with each other while the movable member 60 maintains the engaging position, and the drain valve 12 Is pulled up.

In the state where the drain valve 12 shown in FIG. 6 is seated on the drain port 10a, it is between the contacted portion 15d at the lower end of the pulling upper portion 15b of the rod 15 and the upper surface of the base plate 62 of the movable member 60. Has a clearance C. When the rod 15 is pulled upward from the state shown in FIG. 6, the upper surface 15c of the pulling upper portion 15b and the contact portion 68 are engaged with each other, and the drain valve 12 is pulled up.

Further, when the drain valve 12 is pulled up together with the rod 15 with the clutch mechanism 22 connected, the movable member 60 approaches the bottom surface of the cylinder 14a of the hydraulic drive unit 14. Then, when the drain valve 12 is pulled up to a predetermined position, as shown in FIG. 7, the tip of the regulating portion 70 protruding downward from the bottom surface of the cylinder 14a comes into contact with the base plate 62 of the movable member 60. When the base plate 62 abuts on the tip of the regulating portion 70, the movable member 60 is rotated about the rotation shaft 66 from the “engaged position” shown in FIG. 6 to the “non-engaged position” shown in FIG. To. When the movable member 60 is rotated to the “non-engagement position”, the engagement between the pulling upper portion 15b of the rod 15 and the contact portion 68 of the movable member 60 is released, and the clutch mechanism 22 is released from the connection. That is, when the movable member 60 is rotated around the rotation shaft 66, the abutting portion 68 provided at the tip of the arm 64 moves and comes off from the pulling upper portion 15b at the lower end of the rod 15, and becomes the abutting portion 68. The pulling upper portion 15b is disengaged.

When the clutch mechanism 22 is disengaged, the drain valve 12 is disconnected from the rod 15, the drain valve 12 is lowered, and the drain valve 12 is seated at the drain port 10a. As a result, the discharge of the washing water from the water storage tank 10 to the flush toilet body 2 is stopped.
Next, when the supply of the washing water to the hydraulic drive unit 14 is stopped, the piston 14b and the rod 15 are lowered by the urging force of the spring 14c arranged inside the cylinder 14a. As shown in FIG. 8, as the rod 15 descends, the lower end of the rod 15 approaches the movable member 60 attached to the drain valve 12 seated at the drain port 10a. Since the center of gravity of the movable member 60 is located on the left side of the center of the rotating shaft 66 in FIG. 8, the movable member 60 is in the “non-engaged position” even after the clutch mechanism 22 is disengaged in FIG. Is maintained.

When the rod 15 is further lowered, as shown in FIG. 9, the contacted portion 15d of the rod 15 comes into contact with the base plate 62 of the movable member 60, and the movable member 60 is rotated clockwise in FIG. As a result, the movable member 60 that has been set to the "non-engagement position" is rotated to the "engagement position" shown in FIG. 6 and returns to the state shown in FIG. 6, and the clutch mechanism 22 is engaged.

Next, with reference to FIGS. 10 and 11, a drainage / vacuum break valve 30 connected between the water supply control device 18 and the hydraulic drive unit 14 will be described.
FIG. 10 is a cross-sectional view of the drainage / vacuum break valve 30 in a state where water is not supplied from the water supply control device 18, and FIG. 11 is a cross-sectional view of the drainage / vacuum break valve 30 in a state where water is supplied. be.

As shown in FIGS. 10 and 11, the drainage / vacuum break valve 30 has a valve body case 72, a flap valve body 80, and a packing 82. The valve body case 72 is composed of a box-shaped main body portion 74, an inflow pipe connecting member 76 attached to the upper surface of the main body portion 74, and an outflow pipe connecting member 78 attached to the lower side surface of the main body portion 74. There is.

The main body 74 of the valve body case 72 is formed in a substantially rectangular parallelepiped box shape in which one lower corner is cut out. The upper surface of the main body 74 is open, and the inflow pipe connecting member 76 is attached so as to close the opening 74a. Further, a mounting portion 74b for the outflow pipe connecting member 78 is provided on the lower side surface of the main body portion 74, which is not cut out, and the outflow pipe connecting member 78 is mounted there. Further, an intake / drainage opening 74c is provided on the side surface of the main body portion 74 and on the upper side of the mounting portion 74b. The intake / drain opening 74c is a vertically long rectangular opening that is generally oriented in the vertical direction. When the flap valve body 80 is opened, the outside air is sucked through the intake / drain opening 74c, and the water flowing back from the inflow pipe 24a flows out and is discharged into the water storage tank 10.

The inflow pipe connecting member 76 is provided with a water pipe mounting portion 76a so as to project upward, and a water pipe extending from the water supply control device 18 (FIG. 2) is connected to the water pipe mounting portion 76a. ing. Therefore, the water flowing out from the water supply control device 18 flows vertically downward into the valve body case 72 from the water pipe mounting portion 76a provided in the upper part of the drainage / vacuum break valve 30.

The outflow pipe connecting member 78 is provided with a water pipe mounting portion 78a so as to project in the horizontal direction, and the inflow pipe 24a is connected to the water pipe mounting portion 78a. Therefore, the water supplied from the water supply control device 18 and flowing into the valve body case 72 flows out from the drainage / vacuum break valve 30 through the water pipe mounting portion 78a, and flows out from the drainage / vacuum break valve 30 and the hydraulic drive unit 14 via the inflow pipe 24a. Is supplied to.

The flap valve body 80 is a substantially L-shaped member rotatably mounted in the valve body case 72, and is rotated between the state shown in FIG. 10 and the state shown in FIG. A support shaft 80a extending in the horizontal direction is formed near the intersection of the L-shaped flap valve body 80, and the support shaft 80a is rotatably supported by a bearing portion 76b provided on the inflow pipe connecting member 76. There is. Further, the flap valve body 80 is provided with an arm portion extending in the lateral direction, and a supply water receiving portion 80b is provided at the tip of the arm portion. The supply water receiving portion 80b is arranged below the water pipe mounting portion 76a so as to cover the water pipe mounting portion 76a. Therefore, when water flows in through the water pipe mounting portion 76a, the supply water receiving portion 80b of the flap valve body 80 is pushed downward, and the flap valve body 80 changes from the state shown in FIG. 10 to the state shown in FIG. It is rotated.

Further, the flap valve body 80 has a valve plate portion 80c extending downward from the support shaft 80a and a drainage receiving portion 80d provided below the valve plate portion 80c. The valve plate portion 80c is arranged so as to face the intake / drain opening 74c provided on the side surface of the main body portion 74, and when the flap valve body 80 is rotated to the state shown in FIG. 11, the intake / drain opening 74c is opened. It is configured to cover. Further, a thin plate-shaped packing 82 is attached to the surface of the valve plate portion 80c on the side facing the intake / drainage opening 74c, and when the flap valve body 80 is rotated to the state shown in FIG. The space between the valve plate portion 80c and the intake / drainage opening 74c is sealed.

The drainage receiving portion 80d is formed on the lower side of the valve plate portion 80c, and is arranged so as to face the water pipe mounting portion 78a of the outflow pipe connecting member 78. Therefore, when water flows back from the inflow pipe 24a to the water pipe mounting portion 78a, the drainage receiving portion 80d is pushed and rotated from the state shown in FIG. 11 to the state shown in FIG. The water flowing back from the water pipe mounting portion 78a flows out through the intake / drainage opening 74c and is discharged into the water storage tank 10.

Further, the valve plate portion 80c is provided with a mounting shaft 80e so as to protrude from the intake / drainage opening 74c, and a weight 82a is attached to the tip end portion of the mounting shaft 80e. By attaching the weight 82a, the center of gravity of the entire flap valve body 80 is located closer to the intake / drainage opening 74c than the support shaft 80a (right side in FIGS. 10 and 11). As a result, in a state where the moment of the force for rotating the flap valve body 80 clockwise around the support shaft 80a acts and the static pressure and the dynamic pressure of water do not act, the flap valve body 80 is shown in the figure. It is rotated to the position shown in 10.

Further, a coil spring 84 is attached to the bottom surface of the notched portion of the main body portion 74 so as to face vertically upward. The upper end of the coil spring 84 is located below the water supply receiving portion 80b of the flap valve body 80. As shown in FIG. 11, when the intake / drain opening 74c is closed by the valve plate portion 80c, the upper end of the coil spring 84 abuts on the supply water receiving portion 80b, and the flap valve body 80 rotates clockwise. Be urged in the direction of On the other hand, in the state where the flap valve body 80 is rotated to the position shown in FIG. 10, the upper end of the coil spring 84 and the supply water receiving portion 80b do not abut, and the urging force by the coil spring 84 does not act.

Next, the communication mechanism will be described with reference to FIGS. 3, 15 and the like.
The hydraulic drive unit 14 further includes a communication mechanism 46 for communicating the pressure chamber 14g and the outflow pipe 24b after the clutch mechanism 22 is disengaged.
The communication mechanism 46 forms a piston internal flow path 52 that communicates the pressure chamber 14g and the back pressure chamber 14h according to the position of the piston 14b, thereby connecting the pressure chamber 14g and the outflow pipe 24b to the piston internal flow path 52 and the outflow pipe 24b. It communicates through the back pressure chamber 14h. The piston internal flow path 52 is formed in a tubular shape inside the annular structure of the rod 15, and forms a columnar space. The piston internal flow path 52 extends from the inlet portion 52a formed on the clutch mechanism 22 side of the rod 15 to the outlet portion 52b formed so as to open to the back pressure chamber 14h side of the piston 14b. The inlet portion 52a is formed on the side wall of the rod 15 and also forms an opening penetrating from the outside of the rod 15 to the piston internal flow path 52 inside the rod 15. The outlet portion 52b forms an opening that opens in the axial direction of the rod 15 at the distal end portion of the piston internal flow path 52. The outlet portion 52b is formed in the vicinity of the back pressure chamber side of the piston 14b.

The inlet portion 52a is formed on the pressure chamber 14g side of the piston 14b and at a position separated from the piston 14b by a predetermined distance. For example, the length from the inlet portion 52a to the outlet portion 52b is shorter than the total length inside the cylinder 14a, and is, for example, 50% to 90% of the total length. Therefore, when the piston 14b is in the first position H1, the inlet portion 52a separated from the piston 14b (outlet portion 52b) by a predetermined distance is located outside the cylinder 14a, and the inlet portion 52a opens into the water storage tank 10. Positioned to. Therefore, the piston internal flow path 52 that communicates the pressure chamber 14g and the back pressure chamber 14h is in a closed state and is not formed.

As shown in FIGS. 3, 13, and 14, while the piston 14b is moving from the first position H1 to the second position H2, the inlet portion 52a faces the inner wall of the through hole 14f of the cylinder 14a. Although there is a slight gap between the inlet portion 52a and the inner wall of the through hole 14f, the inlet portion 52a is in a substantially closed state, and the piston that communicates the pressure chamber 14g and the back pressure chamber 14h. The internal flow path 52 is not formed (closed). As shown in FIG. 15, when the piston 14b is in the second position H2, the inlet portion 52a separated from the piston 14b (outlet portion 52b) by a predetermined distance is positioned so as to open into the pressure chamber 14g in the cylinder 14a. ..
Therefore, the communication mechanism 46 forms the piston internal flow path 52 that communicates the pressure chamber 14g and the back pressure chamber 14h when the piston 14b is in the second position H2, thereby forming the pressure chamber 14g and the outflow pipe 24b. Is communicated with the piston internal flow path 52 and the back pressure chamber 14h. On the other hand, in the communication mechanism 46, when the piston 14b is in the first position H1, the piston internal flow path 52 for communicating the pressure chamber 14g and the back pressure chamber 14h is not formed (closed state). At the same time, the internal flow path 52 of the piston communicates the back pressure chamber 14h with the inside of the water storage tank 10 outside the cylinder 14a. Further, in the communication mechanism 46, when the piston 14b is located between the first position H1 and the second position H2, the piston internal flow path 52 for communicating the pressure chamber 14g and the back pressure chamber 14h is formed. The piston internal flow path 52 is not sufficiently communicated with the back pressure chamber 14h and the inside of the water storage tank 10 outside the cylinder 14a. The communication mechanism 46 has a function of switching between a state of communicating and a state of not communicating.

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, 12, and the like.
First, in the standby state (time T0) for cleaning the toilet bowl shown in FIG. 2, the water level in the water storage tank 10 is at the predetermined water level L1 (for example, the full water level), and in this state, the solenoid valve side pilot valve of the water supply control device 18 Both the 50 and the float side pilot valve 44 (FIG. 2) are closed, and the valve seat 40 is closed by the main valve body 38. Therefore, the water supply from the water supply control device 18 to the hydraulic drive unit 14 is in a stopped state (OFF state). Further, as shown in FIG. 3, in the standby state, the piston 14b of the hydraulic drive unit 14 is at the first position H1 in the cylinder 14a. The first position H1 of the piston 14b is the lower limit position in the movable range. The piston 14b is stopped in the cylinder 14a. At this time, the piston 14b is located above the predetermined water level L1 which is the full water level of the water storage tank 10. The rod 15 and the drain valve 12 are stopped in the most lowered state, and the clutch mechanism 22 is in the connected state. In the connected state, the clutch mechanism 22 substantially connects the rod 15 and the drain valve 12, that is, even if there is a slight gap between the rod 15 and the drain valve 12, the rod 15 starts to be pulled up. Immediately after that, a state in which the rod 15 and the drain valve 12 are engaged with each other and the drain valve 12 is pulled up is included. The piston internal flow path 52 formed by the communication mechanism 46 is in a closed state (pressure) because the piston 14b is located at the first position H1 and the inlet portion 52a is located outside the cylinder 14a and inside the water storage tank 10. Communication between the chamber 14g and the back pressure chamber 14h is not formed). The internal flow path 52 of the piston communicates the back pressure chamber 14h with the inside of the water storage tank 10 outside the cylinder 14a, but in the standby state, since the washing water does not exist on the back pressure chamber 14h side, the inside of the piston There is no drainage through the flow path 52. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

Next, at time T1, when the user presses the cleaning button of the remote control device 6, the remote control device 6 transmits an instruction signal for cleaning the toilet bowl to the controller 28. In the flush 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 motion sensor 8. A cleaning instruction signal is transmitted to the controller 28.

Upon receiving the instruction signal for cleaning the toilet bowl, the controller 28 operates the solenoid valve 20 (FIG. 2) to separate the solenoid valve side pilot valve 50 from the pilot valve opening. As a result, the pressure in the pressure chamber 36a is reduced, the main valve body 38 is separated from the valve seat 40, and the main valve body 38 is opened. When the water supply control device 18 is opened, the washing water flowing from the water supply pipe 32 is supplied to the hydraulic drive unit 14 via the water supply control device 18. As a result, as shown in FIG. 13, the piston 14b of the hydraulic drive unit 14 is pushed up, the drain valve 12 is pulled up via the rod 15, and the washing water in the water storage tank 10 flows from the drain port 10a to the flush toilet body 2. It is discharged. That is, the drain valve 12 is driven by the driving force of the water pressure driving unit 14 based on the water supply pressure of tap water supplied through the water supply pipe 32, and the valve is opened. When the drain valve 12 is opened, the washing water (tap water) stored in the water storage tank 10 is discharged to the bowl portion 2a of the flush toilet body 2 through the drain port 10a, and the bowl portion 2a is washed. Will be done.

Further, when the washing water in the water storage tank 10 is discharged, the water level in the water storage tank 10 is lowered below the predetermined water level L1, so that the water supply valve float 34 is lowered. As a result, the arm portion 42 (see FIG. 2) rotates, and the float side pilot valve 44 is opened. In the state where the float side pilot valve port (not shown) is opened, the pressure in the pressure chamber 36a does not increase even if the solenoid valve side pilot valve 50 is closed, so that the main valve body 38 The valve open state can be maintained. Therefore, the controller 28 energizes the solenoid valve 20 to open the main valve body 38, and when a predetermined time elapses and the water level in the water storage tank 10 drops, the energization of the solenoid valve 20 is stopped. As a result, the solenoid valve side pilot valve 50 is closed, but the float side pilot valve opening is opened, so that the main valve body 38 remains separated from the valve seat 40. That is, the controller 28 can open the main valve body 38 for a long time only by energizing the solenoid valve 20 for a short time.

At time T1, the water supply from the water supply control device 18 to the water pressure drive unit 14 is started (ON state), and the inflow of the washing water into the pressure chamber 14g of the cylinder 14a is started. As shown in FIG. 13, the washing water flowing into the pressure chamber 14g of the cylinder 14a starts the ascending of the piston 14b from the first position H1 against the urging force of the spring 14c. When the ascending of the piston 14b is started, the rod 15 is ascended together with the piston 14b, and the clutch mechanism 22 is in the connected state. Therefore, immediately after the rod 15 starts to be pulled up, the rod 15 and the drain valve 12 are engaged with each other. Pull up the drain valve 12. The piston internal flow path 52 is closed because the inlet portion 52a is still located inside the through hole 14f. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T2, when the piston 14b is pushed up and the rod 15 and the drain valve 12 are pulled up to a predetermined position (see FIGS. 7 and 14), the clutch mechanism 22 disconnects the drain valve 12 from the rod 15. A predetermined position of the piston 14b at a height at which the clutch mechanism 22 is disengaged is defined as a third position H3. The third position H3 is at a height lower than that of the second position H2. The restricting portion 70 protruding downward from the cylinder 14a rotates the movable member 60 to the “non-engaging position”, and the engagement between the pulling upper portion 15b of the rod 15 and the contact portion 68 of the movable member 60 is released. As a result, the rod 15 remains pushed upward together with the piston 14b, while the drain valve 12 descends due to its own weight. However, the engaged protrusion 112c (see FIG. 5) of the separated drain valve 12 engages with the engaging portion 26b (see FIG. 2) of the drain valve float mechanism 26, and the descent of the drain valve 12 is prevented. As a result, the drain port 10a of the water storage tank 10 remains open, and drainage from the water storage tank 10 is continued.

Here, when the water level in the water storage tank 10 drops to a second predetermined water level lower than the predetermined water level L1, the float portion 26a (see FIG. 4) of the drain valve float mechanism 26 descends, which causes the engaging portion 26b. , Move to the non-engaged position shown by the imaginary line in FIG. As a result, the engagement between the engaging protrusion 112c of the drain valve 12 and the engaging portion 26b is released, and the drain valve 12 begins to descend again. After that, the drain valve 12 closes the drain port 10a of the water storage tank 10, and the discharge of the washing water to the flush toilet body 2 is stopped. Even after the drain port 10a is closed, the valve seat 40 in the water supply control device 18 is in the opened state, so that the water supplied from the water supply pipe 32 flows into the hydraulic drive unit 14 and is driven by hydraulic pressure. Since the water flowing out from the portion 14 flows into the water storage tank 10 through the outflow pipe 24b, the water level in the water storage tank 10 rises.

The water supply of the washing water into the pressure chamber 14g is continued, and the piston 14b and the rod 15 continue to rise even after the clutch mechanism 22 is disengaged. When the piston 14b is in the third position H3, the inlet portion 52a is in a position facing the inner wall of the through hole 14f of the cylinder 14a, so that there is a slight gap between the inlet portion 52a and the inner wall of the through hole 14f. However, the inlet portion 52a is in a substantially closed state, the piston internal flow path 52 that communicates the pressure chamber 14g and the back pressure chamber 14h is in a closed state, and the piston internal flow path 52 is not formed. ing. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T3, the piston 14b is further pushed up and the rod 15 rises, and when the piston 14b reaches the fourth position H4, the inlet portion 52a reaches the position where the inlet portion 52a opens into the pressure chamber 14g. Therefore, the piston internal flow path 52 that allows the pressure chamber 14g and the back pressure chamber 14h to communicate with each other is formed and is in an open state. Therefore, the washing water flows from the pressure chamber 14g into the piston internal flow path 52 via the inlet portion 52a, flows out from the piston internal flow path 52 through the outlet portion 52b to the back pressure chamber 14h, and flows out from the back pressure chamber 14h. It is discharged to the outflow pipe 24b.

The fourth position H4 is located higher than the third position H3 and slightly lower than the second position H2. That is, the disengagement of the clutch mechanism 22 and the communication between the pressure chamber 14g and the outflow pipe 24b by the communication mechanism 46 are performed according to the displacement of the piston 14b, and the disengagement position (third position) at which the clutch mechanism 22 is disengaged. On the side of the second position H2 from H3), there is a fourth position H4 which is a communication position where the pressure chamber 14g and the outflow pipe 24b are communicated by the communication mechanism 46. While the piston 14b is in the position from the fourth position H4 to the second position H2, the inlet portion 52a is opened in the pressure chamber 14g, and the piston internal flow path 52 communicates the pressure chamber 14g and the back pressure chamber 14h. A flow path is formed.

At time T3, the water supply of the washing water into the pressure chamber 14g is continued, and the piston 14b and the rod 15 continue to rise even after the communication of the piston internal flow path 52. The clutch mechanism 22 is in a disengaged state. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T4, as shown in FIG. 15, when the piston 14b is further pushed up to reach the second position H2, the piston 14b is a protrusion that is a protrusion protruding from the distal end 14k of the cylinder 14a. It comes into contact with the portion 14 m and is stopped. The second position H2 is the position most distal to the first position H1 in the cylinder 14a, for example, the highest position. At this time, the water supply of the washing water into the pressure chamber 14g is continuously continued, and the piston 14b is continuously receiving the pushing pressure, but it is in contact with the protruding portion 14m and is stopped because it cannot be pushed up any more. is doing. The space of the back pressure chamber 14h is still formed in a state where the piston 14b abuts on the protrusion 14m and stops. The protruding portion 14m abuts on the piston 14b and restricts the sliding of the piston 14b to the second position H2. The protruding portion 14m is formed in a region opposite to the drain port with respect to the central axis A of the cylinder 14a. The protruding portion 14 m forms a vertical wall facing the drainage port. The protruding portion 14m forms a vertical wall surface so that the washing water flowing from the outlet portion 52b into the back pressure chamber 14h can easily flow to the drain port side.

In the state where the supply of the washing water into the cylinder 14a is maintained even after the piston 14b reaches the second position H2, the communication mechanism 46 communicates the pressure chamber 14g with the outflow pipe 24b. Be maintained. Since the piston internal flow path 52 is in the open state, washing water flows from the pressure chamber 14g into the piston internal flow path 52 via the inlet portion 52a, and flows from the piston internal flow path 52 through the outlet portion 52b to the back. It flows out to the compression chamber 14h and flows out from the back pressure chamber 14h to the outflow pipe 24b. Therefore, the water pressure on the pressure chamber 14g side and the water pressure on the back pressure chamber 14h side are almost equal. Since a part of the washing water flowing out to the outflow pipe 24b flows into the water storage tank 10, the water level in the water storage tank 10 rises. The clutch mechanism 22 is in a disengaged state. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T5, when the water level of the wash water in the water storage tank 10 rises to the predetermined water level L1, the water supply valve float 34 (see FIG. 2) rises, the float side pilot valve 44 is moved via the arm portion 42, and the float is floated. The side pilot valve 44 is closed. As a result, the float side pilot valve port (not shown) and the pilot valve port (not shown) of the main valve body 38 are closed, so that the pressure in the pressure chamber 36a rises and the main valve body 38 valve. Sit in the seat 40. As a result, the water supply from the water supply control device 18 to the cylinder 14a of the hydraulic drive unit 14 is stopped, and the state is turned off. The piston 14b of the hydraulic drive unit 14 is gradually pushed down by the urging force of the spring 14c after the supply of the washing water to the pressure chamber 14g is stopped and the pushing force of the piston 14b is reduced.

At time T5, as shown in FIG. 16, the piston internal flow path 52 forms a flow path that allows the pressure chamber 14g and the back pressure chamber 14h to communicate with each other. However, as soon as the piston 14b starts descending, the inlet portion 52a is descended from the inside of the pressure chamber 14g to a position facing the inner wall of the through hole 14f, so that the piston internal flow path 52 is closed. After that, the piston 14b and the rod 15 continue to descend. The clutch mechanism 22 is in a disengaged state. At time T5, when the water supply from the water supply control device 18 to the cylinder 14a is stopped, the drainage by the water flowing back from the inflow pipe 24a / the drainage from the vacuum break valve 30 into the water storage tank 10 is started, and the pressure chamber 14g It is in a drainage state (ON state) in which the washing water inside is drained from the drainage / vacuum break valve 30 into the water storage tank 10 via the inflow pipe 24a. Therefore, the water pressure on the pressure chamber 14 g side can be lowered relatively quickly.

At time T6, as shown in FIG. 17, the lower end of the rod 15 descends to the vicinity of the upper end of the valve shaft 12a, and the contacted portion 15d at the lower end of the pulling upper portion 15b abuts on the upper surface of the base plate 62 to bring the movable member 60 into contact. The clutch mechanism 22 is connected by rotating the rod 15 to the “engagement position” and engaging the contact portion 68 of the movable member 60 with the pulling portion 15b of the rod 15.

At time T7, the rod 15 is further lowered, and the contacted portion 15d is stopped in a state of being in contact with the upper surface of the base plate 62 (see FIG. 4). Therefore, the movable member 60 returns to the standby posture. At this time, the piston 14b ends the descending operation and returns to the first position H1 in the cylinder 14a. At times T5 to T7, the water supply from the water supply control device 18 to the cylinder 14a remains stopped. Further, the piston internal flow path 52 is also closed. At times T5 to T7, the wash water in the pressure chamber 14g is drained from the drain / vacuum break valve 30 into the water storage tank 10 through the inflow pipe 24a, and the inner wall of the through hole 14f of the cylinder 14a and the rod 15 are drained. It flows out from the gap 14d between them, and this water flows into the water storage tank 10. As a result, one toilet bowl cleaning is completed, and the flush toilet device 1 returns to the standby state for toilet bowl cleaning.

According to the washing water tank device 4 according to the first embodiment of the present invention described above, the hydraulic drive unit 14 communicates the pressure chamber 14g and the back pressure chamber 14h with the piston 14b in the second position H2. The communication mechanism 46 forming the piston internal flow path 52 and the communication mechanism 46 provided on the end side of the cylinder 14a with respect to the second position H2 of the piston 14b, extend from the drain port for draining the washing water in the cylinder 14a, and the outflow pipe 24b. A connection portion 14o to which is connected is provided. As a result, with a relatively simple configuration, with the piston 14b at the second position H2, the washing water of the pressure chamber 14g is discharged to the back pressure chamber 14h and the connection portion 14o, and the pressure of the washing water of the pressure chamber 14g is reached. It is possible to easily lower the pressure, the piston 14b can easily return from the second position H2 to the first position H1, and the outlet of the base of the connection portion 14o is temporarily closer to the first position H1 than the second position H2. When the outlet at the base of the connecting portion 14o is provided on the end side of the cylinder 14a with respect to the second position H2, the flow of the washing water toward the outlet is the piston 14b. It does not hinder sliding and can improve the stability of the sliding operation of the piston 14b.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the cylinder 14a is connected to a tubular first member 14l that opens toward the end side of the cylinder 14a and a first member 14l. The tubular second member 14n includes a second member 14n that forms a lid portion that covers the opening of the first member 14l. As a result, the cylinder 14a can be relatively easily configured by using two parts, the first member 14l and the second member 14n, and the connecting portion 14o extending from the outlet is provided on the side wall of the second member 14n. It is possible to further improve the handling of the drainage pipe connected to the connection portion 14o while maintaining the low silhouette in which the height of the cylinder 14a is suppressed.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the second member 14n and the first member 14l are provided so that the connecting portion 14o is provided in a direction selected from a plurality of types of directions. A mounting structure is formed. As a result, the positions of the connection portion 14o and the outflow pipe connected to the connection portion 14o can be set relatively freely according to the layout of the equipment in the water storage tank 10, and the degree of freedom in the layout of the parts in the water storage tank 10 is improved. can.

Further, according to the washing water tank device 4 according to the first embodiment of the present invention, the second member 14n abuts on the piston 14b and has a protruding portion 14m that restricts the sliding of the piston 14b to the second position H2. Therefore, the protruding portion 14m includes a protruding portion 14m formed in a region opposite to the outlet with respect to the central axis of the cylinder 14a. As a result, while the cylinder 14a is formed in a low silhouette, the washing water flows from the piston internal flow path 52 to the protrusion 14m in the back pressure chamber 14h and the outflow port in a state where the piston 14b slides to the second position H2. It is possible to secure a space flowing to the outlet through the area between the and. Therefore, while the cylinder 14a is formed in a low silhouette, the washing water can be smoothly flowed out from the pressure chamber 14g to the outflow port via the back pressure chamber 14h.

Further, the first embodiment of the present invention is the flush toilet device 1, characterized by having a flush toilet main body 2 and a flush water tank device 4 capable of easily reducing the pressure of the flush water in the pressure chamber. There is.

Next, the flush toilet device 101 according to the second embodiment of the present invention will be described with reference to FIGS. 18 to 36. The second embodiment is an example in which the hydraulic drive unit and the clutch mechanism of the flush toilet device 101 according to the present invention have different structures.
Since the flush toilet device 101 according to the second embodiment has substantially the same structure as the flush toilet device 1 according to the first embodiment described above, only the points different from the first embodiment of the second embodiment of the present invention will be described. However, the same reference numerals are given to the drawings for similar parts, and the description thereof will be omitted.

As shown in FIG. 18, the flush toilet device 101 according to the first embodiment of the present invention comprises a flush toilet main body 2 which is a flush toilet and a flush water tank device 104 mounted on the rear portion of the flush toilet main body 2. I have.

The washing water tank device 104 has a water pressure driving unit 114 which is a drain valve water pressure driving unit that drives the drain valve 12 by using the supply pressure of the supplied tap water.

Next, the structures of the hydraulic drive unit and the drain valve will be described with reference to FIGS. 18 to 20.
The hydraulic drive unit 14 has a piston 114b slidably arranged in the cylinder 14a, a rod 115 extending from the inside to the outside of the cylinder 14a and connecting to the drain valve 12, and a second position H2 of the piston 14b. A connecting portion 114o, which is provided on the end side of the cylinder 14a and extends from a drain port for draining the washing water in the cylinder 14a and to which the outflow pipe 124b is connected, is provided. The rod 115 projects from the lower end of the cylinder 14a and extends toward the drain valve 12. Further, the rod 115 is arranged so as to be located on the same straight line as the valve shaft 12a rising from the center of the valve body portion 12b of the drain valve 12, and the drain valve 12 and the rod 115 are arranged coaxially.

The piston 114b divides the inside of the cylinder 14a into a pressure chamber 14g on the front side of the piston 114b and a back pressure chamber 14h on the back side of the piston 114b, and the piston 114b is further divided by the pressure of the washing water flowing into the pressure chamber 14g. It is moved from the position H1 of 1 to the second position H2 (see FIG. 20).

A clutch mechanism 122 is provided at the connection portion between the lower end of the rod 115 and the drain valve 12, and the rod 115 and the drain valve 12 are connected by the clutch mechanism 122, and the rod 115 and the drain valve 12 are connected at a predetermined timing. The connection is broken.

On the other hand, an outlet is provided on the upper part of the cylinder 14a. The connecting portion 114o extends from the outlet of the second member 14n. The connecting portion 114o forms a screwed surface on the inner surface. The connecting portion 114o is provided on the ceiling wall of the second member 14n. The outflow pipe 124b, which is an outflow portion, is attached to the connection portion 114o and communicates with the inside of the cylinder 14a via the outlet at the base of the connection portion 114o. The outflow pipe 124b is designed to allow the washing water in the cylinder 14a to flow out. Therefore, when water flows into the cylinder 14a from the inflow pipe 124a connected to the lower part of the cylinder 14a, the piston 114b is moved from the lower part of the cylinder 14a at the first position H1 (see FIG. 19) due to the pressure of the inflowing water. It is pushed up to the upper second position H2 (see FIG. 20). Then, the water flowing into the cylinder 14a flows out from the outflow hole through the outflow pipe 124b. That is, the piston 114b is moved from the first position H1 to the second position H2 of the cylinder 14a by the pressure of tap water. The outflow pipe 124b is provided in the cylinder 14a at a position on the back surface side (distal side) of the piston 14b with respect to the second position H2 of the piston 14b. As shown in FIG. 2, an outflow pipe branch portion 24c is provided at the tip of the outflow pipe 124b extending from the cylinder 14a.

As described above, the outflow pipe 124b may be connected to the cylinder 14a via the connecting portion 114o at a position on the back surface side (distal side) of the piston 114b further than the second position H2 of the piston 114b. Therefore, the connecting portion 114o is not limited to the position substantially at the center of the second member 14n as shown in FIG. 19 or the like, and may be provided on the end side or the side wall of the ceiling wall of the second member 14n. Further, the connecting portion 114o may be formed so as to extend from the second member 14n in a specific direction and connect to the outflow pipe 124b. When the connection position and direction of the outflow pipe 124b are specified by providing the connection portion 114o on the end side, the side wall, or the like in this way, the direction selected by the connection portion 114o from a plurality of types of directions, For example, a mounting structure of the second member 14n and the first member 14l is formed so as to be directed to one of the four preset directions with respect to the first member 14l. With such a mounting structure, the second member 14n is locked to the first member 14l at a plurality of rotated positions. Therefore, the second member 14n can be attached so that the connecting portion 114o faces in a desired direction. Even when the second member 14n is locked to the first member 14l at a plurality of rotated positions, the second engaging portion 192 (see FIG. 33) has a plurality of cylinder sides as described later. A chevron portion 192a is formed, a plurality of chevron portions 188a are formed in the first engaging portion 188, and a second engaging portion is formed at each position where the second member 14n is rotated with respect to the first member 14l. The portion 192 and the first engaging portion 188 are formed so as to mesh with each other (the chevron portion and the valley-shaped portion mesh with each other). Further, the first member 14l and the second member 14n are fitted and connected to each other so as to achieve such a structure, but the second member 14n is configured so as not to rotate with respect to the first member 14l. In this case, the first member 14l and the second member 14n may be connected by welding, joining or the like.

As shown in FIGS. 3 and 4, the rod 115 is a rod-shaped member, and extends downward from the inside of the cylinder 14a through a through hole 14f formed in the bottom surface of the cylinder 14a. Further, the lower end of the rod 115 is connected to the drain valve 12 via the clutch mechanism 22. Therefore, when water flows into the cylinder 14a and the piston 14b is pushed up, the rod 115 connected to the piston 114b or the valve constituent member 114i described later lifts the drain valve 12 upward, and the drain valve 12 is opened. ..

Further, a clutch mechanism 122 is provided between the rod 15 and the valve shaft 12a of the drain valve 12. The clutch mechanism 122 connects the drain valve 12 and the rod 115 of the hydraulic drive unit 114, and pulls up the drain valve 12 by the driving force of the hydraulic drive unit 114. The clutch mechanism 122 is configured to disconnect the valve shaft 12a of the drain valve 12 from the rod 115 by the rotation of the rod 115 when the drain valve 12 is lifted to a predetermined position. When the clutch mechanism 122 is disengaged, the drain valve 12 is not linked to the movements of the piston 14b and the rod 15, and descends due to gravity while resisting buoyancy.

Next, a more detailed structure of the hydraulic drive unit 114 will be described with reference to FIGS. 19 to 27.
The piston 114b of the hydraulic drive unit 114 is moved from the first position H1 to the second position H2 in the first direction D1 (see FIG. 19) by receiving the supply pressure of the washing water flowing into the pressure chamber 14g. It is formed like this. Further, when the piston 114b, which has been moved in the first direction D1 by stopping or reducing the inflow of the washing water into the cylinder 14a, returns, the piston 114b is first from the second position H2 in the cylinder 14a. It is formed so as to move toward the position H1 in the second direction D2 opposite to the first direction D1.

The piston 114b has an inner cylinder portion 154 forming a vertical wall extending in parallel with the central axis A (see FIG. 19) of the cylinder 14a on the inside, and an annular disk shape extending outward from the inner cylinder portion 154. The outer cylinder portion 158 forming a vertical wall extending parallel to the central axis A (see FIG. 19) of the cylinder 14a from the outer portion of the first plate portion 156 and the first plate portion 156, and the cylinder from the top of the outer cylinder portion 158. It is provided with a back pressure chamber side protrusion 159 that further protrudes in parallel with the central axis A of 14a, and a pressure chamber side protrusion 161 that extends from the first plate portion 156 to the pressure chamber 14 g side.

The inner cylinder portion 154 is formed so as to rise from the first plate portion 156 toward the back pressure chamber 14h. The inner cylinder portion 154 forms a vertical wall having a height lower than that of the outer cylinder portion 158. The inner cylinder portion 154 is formed inside the inner cylinder portion 154 so as to rotatably receive the first engaging portion 188 of the valve constituent member 114i.
The first plate portion 156 forms a flat seat surface 156a (see FIG. 22) on the pressure chamber 14g side. The first plate portion 156 is formed in the shape of a flat plate having a thin thickness. A piston opening 157 is formed in the first plate portion 156. Four piston openings 157 are formed and are arranged at equal intervals at 90 degree intervals in the annular first plate portion 156. The piston openings 157 may be one or may be formed by a plurality of piston openings other than four. Further, the piston openings 157 do not have to be evenly spaced in the annular first plate portion 156. The plurality of piston openings 157 are arranged so as to be arranged in the circumferential direction of the first plate portion 156. The piston opening 157 forms a rectangular opening when the first plate portion 156 is viewed from the pressure chamber 14g side, the short side thereof extends in the circumferential direction of the first plate portion 156, and the long side thereof extends. It extends in the radial direction of the first plate portion 156. The piston opening 157 forms a through hole that penetrates the first plate portion 156 from the pressure chamber 14g side to the back pressure chamber 14h side along the central axis A.

The outer tubular portion 158 is formed so as to rise from the first plate portion 156 toward the back pressure chamber 14h. The outer cylinder portion 158 is formed so as to attach the packing 14e to the outer surface thereof. The back pressure chamber side protrusions 159 are formed at two opposite positions of the annular outer cylinder portion 158. That is, the back pressure chamber side protrusions 159 are arranged at equal intervals of 180 degrees in the annular outer cylinder portion. The back pressure chamber side protrusion 159 is formed in a trapezoidal shape so as to form a flat portion at the top. The back pressure chamber side protrusion 159 may be formed by one or a plurality of protrusions other than two. The pressure chamber side protrusion 161 extends in a rod shape from the first plate portion 156. The pressure chamber side protrusion 161 extends parallel to the central axis A (see FIG. 19).

The hydraulic drive 114 further comprises a valve component 114i that is movably formed along with the piston 114b from the first position H1 to the second position H2 and is mounted along the first plate portion 156 of the piston 114b. ing. The valve component 114i, when combined with the piston 114b, opens and closes a plurality of openings in the flow path that communicates the pressure chamber 14g and the back pressure chamber 14h in the cylinder 14a (see FIGS. 8 and 9). Is forming. At least one communication valve 116 is formed so as to open and close a plurality of openings. The valve constituent member 114i is formed so as to be relatively movable with respect to the piston 114b separately from the movement from the first position H1 to the second position H2. The valve component 114i is formed so as to rotate about an axis parallel to the rod 115.

The valve component 114i has a second plate portion 186 formed in an annular disk shape on the outside of the rod 115, and a first engaging portion that rises from the inner portion of the second plate portion 186 toward the back pressure chamber 14h side. It includes a 188 and a receiving portion 190 that is rotated by receiving a flow of washing water.

The second plate portion 186 forms a flat surface 186a on the back pressure chamber 14h side and a flat surface on the pressure chamber 14g side. Since the second plate portion 186 forms a flat surface 186a on the back pressure chamber 14h side, the second plate portion 186 is arranged in parallel along the first plate portion 156 and the second plate portion 186. Can rotate in parallel along the first plate portion 156. The valve constituent member 114i is formed so as to move in parallel with the seat surface 156a of the piston 114b. For example, the flat surface 186a of the valve constituent member 114i is formed so as to rotate and move in parallel with the seat surface 156a. The second plate portion 186 is formed in the shape of a flat plate having a thin thickness. The valve component side opening 187 is formed in the second plate portion 186. Four valve component side openings 187 are formed and are arranged at equal intervals at 90 degree intervals in the annular second plate portion 186. The valve component side opening 187 may be one or may be formed by a plurality of openings other than four. Further, the valve constituent member side openings 187 may not be arranged at equal intervals in the annular second plate portion 186. The plurality of valve component side openings 187 are arranged so as to be arranged in the circumferential direction of the second plate portion 186.
The valve component side opening 187 forms a rectangular opening when the second plate portion 186 is viewed from the pressure chamber 14g side, and its short side extends in the circumferential direction of the second plate portion 186. The long side extends in the radial direction of the second plate portion 186. The valve component side opening 187 forms a through port that penetrates the second plate portion 186 from the pressure chamber 14g side to the back pressure chamber 14h side along the central axis A. The valve component side opening 187 forms a slightly larger opening than the piston opening 157.

A rib 194 (see FIG. 23) is formed in the second plate portion 186 so as to surround the valve component side opening 187. The rib 194 is formed so as to project from a part of the surface of the valve constituent member 114i facing the piston 114b. The rib 194 forms a protrusion slightly raised from the surface of the second plate portion 186. The rib 194 is formed so as to cover the circumference of all the valve component side openings 187 and the guide opening 189, and is formed at the same height. Therefore, the second plate portion 186 and the seat surface 156a come into contact with each other via the rib 194. The rib 194 may be formed on the second plate portion 186 other than the periphery of the valve component side opening 187. Further, the rib 194 may be formed on a part of the surface of the piston 114b on the seat surface 156a side facing the valve constituent member 114i.

The second plate portion 186 is further formed with a guide opening 189 for receiving the pressure chamber side protrusion 161. The guide opening 189 extends in the circumferential direction in the second plate portion 186 to form an arc-shaped opening. Therefore, the guide opening 189 regulates the range in which the valve constituent member 114i rotates with respect to the piston 114b while the pressure chamber side protrusion 161 is received, and defines the rotation range and rotation direction of the valve constituent member 114i. is doing. The guide opening 189 is formed so that, for example, the rotation range of the valve constituent member 114i is an angle within a range of, for example, about 15 degrees to 45 degrees, more preferably 30 degrees. Although the guide opening 189 is connected to one of the valve constituent member side openings 187, the guide opening 189 may be formed separately from one of the valve constituent member side openings 187.

The first engaging portion 188 forms a protruding portion extending toward the distal end 14k of the cylinder 14a. The first engaging portion 188 is formed so that the tip end portion of the cylindrical tubular portion forms a plurality of chevron portions 188a. The first engaging portion 188 forms four triangular chevron portions 188a. The chevron portion 188a forms an inclined surface 188b which is an inclined portion on the side surface thereof. As will be described later, the inclined surface 188b abuts on the cylinder-side inclined surface 192b of the opposing cylinder-side chevron portion 192a, thereby exerting a rotational force in the circumferential direction on the first engaging portion 188 and the valve constituent member 114i. It is generated and the valve constituent member 114i is rotated to a position corresponding to the open state of the communication valve 116. Therefore, the first engaging portion 188 is a valve when the piston 114b reaches the second position H2 (see FIG. 34) and the first engaging portion 188 and the second engaging portion 192 are engaged. It includes an inclined surface 188b that moves the component 114i relative to the piston 114b in a direction different from the direction of movement of the piston 114b. Therefore, the direction in which the valve constituent member 114i is moved relative to the piston 114b so as to open the communication valve 116 is different from the direction in which the piston 114b is moved. The valve component 114i is formed so as to move in a direction orthogonal to the direction of movement of the piston 114b. Four chevron portions 188a are formed and are arranged at equal intervals at 90 degree intervals in the annular first engaging portion 188. The chevron portion 188a may be formed by one or a plurality of portions other than four. Further, if the chevron portion 188a is formed so as to abut on the cylinder side chevron portion 192a to generate a rotational force in the first engaging portion 188, the chevron portion 188a is arranged at equal intervals in the first engaging portion 188. It does not have to be.

The receiving unit 190 includes a plurality of blades having a horizontal cross section formed in the shape of an aircraft wing. The blades of the receiving portion 190 are arranged along the outer periphery of the rod 115, and are arranged so as to be rotated around the rod 115 by receiving the flow of the washing water flowing from the inflow pipe 24a into the pressure chamber 14g. The receiving portion 190 is connected to the second plate portion 186, and the second plate portion 186 is rotated in accordance with the rotation of the receiving portion 190. The receiving unit 190 is arranged so that its rotation direction is restricted so that it can be rotated in only one direction from the standby state. Therefore, the receiving portion 190 is rotated in only one predetermined direction from the standby state, and the second plate portion 186 is rotated in the same direction.

As shown in FIG. 3, the cylinder 14a includes a second engaging portion 192 that rises inward from the end portion 14k distal to the second position H2 of the cylinder 14a toward the back pressure chamber 14h side. ing. The second engaging portion 192 forms a protruding portion extending inward of the cylinder 14a. The second engaging portion 192 is formed in the same manner as the first engaging portion 188 so as to be paired with the first engaging portion 188, and the tip portions of the cylindrical tubular portions form a plurality of cylinder-side chevron portions 192a. Form. The second engaging portion 192 forms four triangular cylinder-side chevron portions 192a. The cylinder-side chevron portion 192a forms a cylinder-side inclined surface 192b, which is an inclined portion, on its side surface. Therefore, the second engaging portion 192 pistons the valve constituent member 114i when the piston 114b reaches the second position H2 and the first engaging portion 188 and the second engaging portion 192 are engaged. A cylinder-side inclined surface 192b that moves relative to the piston 114b in a direction different from the direction of movement of 114b is provided. Four cylinder-side chevron portions 192a are formed and are arranged at equal intervals at 90 degree intervals in the annular second engaging portion 192. The cylinder-side chevron portion 192a may be formed by one or a plurality of other than four. Further, if the cylinder-side chevron portion 192a is formed so as to come into contact with the chevron portion 188a and generate a rotational force in the first engaging portion 188, the chevron portions 192a are arranged at equal intervals in the second engaging portion 192. It does not have to be. At least one of the first engaging portion 188 and the second engaging portion 192 includes an inclined surface 188b which is an inclined portion or a cylinder side inclined surface 192b.

The rod 115 is connected to the piston 114b or the valve component 114i. In this embodiment, the rod 115 is connected to the valve component 114i and not to the piston 114b. To explain the present embodiment again, since the rod 115 is connected to the valve constituent member 114i, the rod 115 is formed so as to rotate in accordance with the rotation of the valve constituent member 114i. In a state where the rod 115 extends from the valve constituent member 114i, the inside of the rod 115 and the inside of the first engaging portion 188 form a continuous second piston internal flow path 152.

Here, the hydraulic drive unit 114 further includes a first communication mechanism 145 (see FIGS. 22 and 23) that allows the pressure chamber 14g and the outflow pipe 124b to communicate with each other after the clutch mechanism 122 is disengaged. The first communication mechanism 145 is formed as a communication valve 116 by the piston 114b and the valve constituent member 114i. The first communication mechanism 145 forms a first piston internal flow path 151 (see FIGS. 24 and 25) that allows the pressure chamber 14g and the back pressure chamber 14h to communicate with each other according to the position of the piston 114b, thereby forming the pressure chamber 14g. And the outflow pipe 124b are communicated with each other via the communication valve 116 and the back pressure chamber 14h. More specifically, as will be described later, when the valve component side opening 187 of the valve component 114i is located at the same position as the piston opening 157 of the piston 114b, the communication valve 116 is opened and the pressure chamber 14 g. A first piston internal flow path 151 is formed so as to communicate the back pressure chamber 14h with the back pressure chamber 14h. The communication valve 116 forms the first piston internal flow path 151 in the open state, and closes the first piston internal flow path 151 in the closed state. The first piston internal flow path 151 is formed as a flow path in which the valve component side opening 187 and the piston opening 157 communicate with each other.

Therefore, the first communication mechanism 145 forms the first piston internal flow path 151 that communicates the pressure chamber 14g and the back pressure chamber 14h when the valve component side opening 187 is located at the same position as the piston opening 157. The communication valve 116 is opened, and the pressure chamber 14g and the outflow pipe 124b are communicated with each other via the first piston internal flow path 151 and the back pressure chamber 14h.
On the other hand, the first communication mechanism 145 forms a first piston internal flow path 151 that communicates the pressure chamber 14g and the back pressure chamber 14h when the valve component side opening 187 is located at a position different from the piston opening 157. The state is not closed (closed), and the communication valve 116 is closed.

The hydraulic drive unit 114 further includes a second communication mechanism 146 that communicates the pressure chamber 14g and the outflow pipe 124b after the clutch mechanism 122 is disengaged. The second communication mechanism 146 forms a second piston internal flow path 152 that communicates the pressure chamber 14g and the back pressure chamber 14h according to the position of the piston 114b, so that the pressure chamber 14g and the outflow pipe 124b are seconded. It communicates with the piston internal flow path 152 and the back pressure chamber 14h. The second piston internal flow path 152 is formed in a tubular shape inside the annular structure of the rod 115 and the first engaging portion 188, and forms a columnar space. The second piston internal flow path 152 extends from the inlet portion 152a formed on the clutch mechanism 122 side of the rod 115 to the outlet portion 152b formed so as to open on the back pressure chamber 14h side of the piston 114b. The inlet portion 152a is formed as an opening toward the side wall of the rod 115. The outlet portion 152b forms a central opening that opens in the axial direction of the rod 115 at the end portion of the first engaging portion 188. The outlet portion 152b is formed in the vicinity of the back pressure chamber side of the piston 114b.

On the other hand, the inlet portion 152a is formed on the pressure chamber 14g side of the piston 114b and at a position separated from the piston 114b by a predetermined distance. For example, the length from the inlet portion 152a to the outlet portion 152b is shorter than the total length inside the cylinder 14a, and is, for example, 50% to 90% of the total length. Therefore, when the piston 114b is in the first position H1, the inlet portion 152a separated from the piston 114b (outlet portion 152b) by a predetermined distance is located outside the cylinder 14a, and the inlet portion 152a opens into the water storage tank 10. Positioned to. Therefore, the second piston internal flow path 152 that communicates the pressure chamber 14g and the back pressure chamber 14h is not formed (closed state), and the second piston internal flow path 52 is the water storage tank 10. It is connected to the side.

While the piston 114b is moving from the first position H1 to the second position H2, when the inlet portion 152a is outside the cylinder 14a, the second piston that communicates the pressure chamber 14g and the back pressure chamber 14h. The internal flow path 152 is in a closed state and is not formed. Further, when the inlet portion 52a is located at a position facing the inner wall of the through hole 14f of the cylinder 14a, the inlet portion 152a is almost closed although there is a slight gap between the inlet portion 152a and the inner wall of the through hole 14f. The second piston internal flow path 152 for communicating the pressure chamber 14g and the back pressure chamber 14h is not formed (closed state). When the piston 114b is in the second position H2, the inlet portion 152a separated from the piston 114b (outlet portion 152b) by a predetermined distance is positioned so as to open into the pressure chamber 14g in the cylinder 14a. Therefore, the second communication mechanism 146 forms the second piston internal flow path 152 that communicates the pressure chamber 14g and the back pressure chamber 14h when the piston 114b is in the second position H2, thereby forming the pressure chamber 14g. The outflow pipe 124b is communicated with the internal flow path 152 of the second piston and the back pressure chamber 14h. On the other hand, the second communication mechanism 146 is formed so that when the piston 114b is in the first position H1, the second piston internal flow path 152 that communicates the pressure chamber 14g and the back pressure chamber 14h is in a closed state. The internal flow path 152 of the second piston communicates the back pressure chamber 14h with the inside of the water storage tank 10 outside the cylinder 14a. The hydraulic drive unit 114 may include only the first communication mechanism 145 with the second communication mechanism 146 omitted. The first communication mechanism 145 and / or the second communication mechanism 146 has a function of switching between a communication state and a non-communication state.

Next, the clutch mechanism 122 for connecting the drain valve 12 and the rod 115 will be described with reference to FIGS. 28 and 29.
FIG. 28 is a partially enlarged cross-sectional view showing a clutch mechanism in a connected state in the washing water tank device according to the second embodiment of the present invention. FIG. 29 is a partially enlarged cross-sectional view showing a clutch mechanism in a disconnected state in the washing water tank device according to the second embodiment of the present invention.

In the clutch mechanism 122, for example, the valve component 114i reverses the first rotation direction B1 so that the communication valve 116 changes from the open state as shown in FIG. 24 to the closed state of the communication valve 116 as shown in FIG. The drain valve 12 and the rod 115 are formed so as to be connected to each other by rotating the rod 115 in the second rotation direction B2 (see FIG. 26) and rotating the rod 115 in the second rotation direction B2.
Further, as shown in FIGS. 26 and 29, in the clutch mechanism 122, the valve constituent member 114i is rotated in the first rotation direction B1 with respect to the piston 114b, and the rod 115 is rotated in the first rotation direction B1. As a result, the drain valve 12 and the rod 115 are formed so as to be disconnected from each other.

More specifically, the clutch mechanism 122 includes a rod engaging portion 115a at the lower end of the rod 115 and a valve shaft engaging portion 112k at the upper end of the valve shaft 12a of the drain valve 12. That is, the rod 115 extends downward from the lower surface of the piston 114b of the hydraulic drive unit 114, and the rod engaging portion 115a at the lower end portion of the rod 115 constitutes a part of the clutch mechanism 122. Further, the valve shaft engaging portion 112k at the upper end portion of the valve shaft 12a constitutes a part of the clutch mechanism 122. By engaging / disengaging the valve shaft engaging portion 112k with the rod engaging portion 115a, the rod 115 and the drain valve 12 are connected / disengaged.

As shown in FIG. 28, the rod engaging portion 115a is formed below the rod shaft portion 115b at the lower end portion of the rod 115. The rod engaging portion 115a is formed in a rectangular parallelepiped shape, and its outer edge is formed so as to extend to the outside of the cylindrical rod shaft portion 115b. The valve shaft engaging portion 112k faces the first engaging claw portion 112l, which extends upward from the first side portion 112e of the upper end portion of the valve shaft 12a and then bends inward in an L shape, and the first side portion 112e. It is provided with a second engaging claw portion 112d that extends upward from the second side portion 112f and then bends inward in an L shape.
The first engaging claw portion 112l is located at the position on the third side portion 112g side of the valve shaft 12a on the first side portion 112e side, and the second engaging claw portion 112d is located on the valve shaft on the second side portion 112f side. It is located at the position on the fourth side portion 112h side of 12a. The third side portion 112g and the fourth side portion 112h are located on the side of the first side portion 112e, and the fourth side portion 112h faces the third side portion 112g. The valve shaft engaging portion 112k has an engaging portion that engages with the rod engaging portion 115a by the first engaging claw portion 112l and the second engaging claw portion 112d facing the first engaging claw portion 112l. Is forming.

The first engaging claw portion 112l forms the first slope portion 112i in which the lateral portion of the engaging portion extending inward is notched diagonally.
The second engaging claw portion 112d forms a second slope portion 112j (see FIG. 19) in which the lateral portion of the engaging portion extending inward is notched diagonally. The first slope portion 112i and the second slope portion 112j are arranged so as to face each other, and the first slope portion 112i and the second slope portion 112j extend in parallel. The distance between the first slope portion 112i and the second slope portion 112j is formed to be slightly larger than the length of the short side of the rod engaging portion 115a and shorter than the length of the long side. Therefore, as shown in FIG. 28, when the rod engaging portion 115a rises while the rod engaging portion 115a is in a posture parallel to the first engaging claw portion 112l and the second engaging claw portion 112d, The rod engaging portion 115a engages with the first engaging claw portion 112l and the second engaging claw portion 112d, and the rod engaging portion 115a is connected to the valve shaft engaging portion 112k so as to pull up the valve shaft 12a.
On the other hand, as shown in FIG. 29, the rod engaging portion 115a is rotated and has a posture parallel to the first slope portion 112i of the first engaging claw portion 112l and the second slope portion 112j of the second engaging claw portion 112d. The rod engaging portion 115a passes between the first slope portion 112i and the second slope portion 112j, and the rod engaging portion 115a passes through the first engaging claw portion 112l and the second engaging claw portion 112l. The engagement claw portion 112d is no longer engaged, or even if it is engaged, the engagement is disengaged, and the connection between the rod engaging portion 115a and the valve shaft engaging portion 112k is released.

Next, the operation of the clutch mechanism 122 will be described with reference to FIGS. 28 and 29.
First, in the standby state, the drain valve 12 is seated at the drain port 10a, and the clutch mechanism 122 is in the disengaged state (disconnected state) as shown in FIG. 29. When the clutch mechanism 122 is in the disengaged state (disconnected state), the rod engaging portion 115a engages with the first engaging claw portion 112l and the second engaging claw portion 112d when pulled upward. A direction that does not fit (or a direction that does not sufficiently engage the first engaging claw portion 112l or the second engaging claw portion 112d to the extent that it can be pulled up), for example, the first slope portion 112i and the second slope when viewed from above. It is arranged in a posture direction substantially parallel to the portion 112j.

When the supply of the washing water to the hydraulic drive unit 114 (FIG. 31) is started, the receiving unit 190 receives the flow of the washing water and rotates the rod 115. Therefore, as shown in FIG. 28, the rod engaging portion 115a is oriented so as to engage with the first engaging claw portion 112l and the second engaging claw portion 112d when pulled upward, for example, in a top view. It is rotated so as to have a posture substantially parallel to the first engaging claw portion 112l and the second engaging claw portion 112d. At this point, there is still an upper clearance C between the rod engaging portion 115a and the valve shaft engaging portion 112k. When the rod 115 is pulled upward from the state shown in FIG. 28, the rod engaging portion 115a and the valve shaft engaging portion 112k are engaged with each other, and the drain valve 12 is pulled up. When the washing water is supplied to the hydraulic drive unit 114 and the rod 115 is pulled upward from the state shown in FIG. 28, the valve shaft engaging portion 112k is pulled vertically upward by the rod engaging portion 115a. That is, when the rod 115 is pulled up, the drain valve 12 is pulled up while the rod engaging portion 115a maintains the connected state with the valve shaft engaging portion 112k (the state in which the clutch mechanism 122 is connected).

Further, when the drain valve 12 is pulled up by a predetermined distance together with the rod 115 with the clutch mechanism 122 engaged, the piston 114b reaches the second position H2. When the piston 114b reaches the second position H2, the valve component 114i is rotated in the first rotation direction B1, the rod 115 is rotated in the first rotation direction B1, and the rod engaging portion 115a is shown in FIG. As shown in FIG. 15, the rod engaging portion 115a and the valve shaft engaging portion 112k are rotated into a posture in which the connection is released. Therefore, the engagement between the rod engaging portion 115a and the valve shaft engaging portion 112k is released, and the coupling of the clutch mechanism 122 is released.

When the clutch mechanism 122 is disengaged, the drain valve 12 is disconnected from the rod 115, the drain valve 12 is lowered, and the drain valve 12 is seated at the drain port 10a. As a result, the discharge of the washing water from the water storage tank 10 to the flush toilet body 2 is stopped.
Next, when the supply of the washing water to the hydraulic drive unit 114 is stopped, the piston 114b and the rod 115 are lowered. As shown in FIG. 29, the rod engaging portion 115a is lowered in a rotated posture, and is lowered below the engaging portion at the tip of the valve shaft engaging portion 112k.

When the rod 115 is further lowered, as shown in FIG. 29, the rod engaging portion 115a of the rod 115 comes into contact with the top of the valve shaft 12a and is stopped. At this time, the clutch mechanism 122 remains engaged, and the washing water tank device returns to the standby state thereafter.

Next, a series of cleaning 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. 18, 30 to 35 and the like.
FIG. 30 shows the displacement of the piston, the state of cylinder water supply, the state of the clutch mechanism, the state of the internal flow path of the first piston, and the drainage from the drainage / vacuum break valve in the washing water tank device according to the second embodiment of the present invention. It is a timing chart which shows the time change such as the state of. On the vertical axis, the displacement and height position of the piston, switching between the ON state and OFF state of the cylinder water supply, switching between the connected state and the disengaged state of the clutch mechanism, switching between the open state and the closed state of the first piston internal flow path, and drainage. / The change in switching between the ON state and the OFF state of the drainage from the vacuum break valve is shown, and the passage of time is shown on the horizontal axis.

First, in the standby state (time T10) for cleaning the toilet bowl shown in FIG. 18, the water level in the water storage tank 10 is at the predetermined water level L1 (for example, the full water level), and in this state, the solenoid valve side pilot valve of the water supply control device 18 Both the 50 and the float side pilot valve 44 (see FIG. 18) are closed, and the valve seat 40 is closed by the main valve body 38. Therefore, the water supply from the water supply control device 18 to the hydraulic drive unit 114 is in a stopped state (OFF state). Further, as shown in FIG. 19, in the standby state, the piston 114b of the hydraulic drive unit 114 is at the first position H1 in the cylinder 14a. The first position H1 of the piston 114b is the lower limit position in the movable range. The piston 114b is stopped in the cylinder 14a. At this time, the piston 114b is located above the predetermined water level L1 of the water storage tank 10. The rod 115 and the drain valve 12 are stopped in the most lowered state, and the clutch mechanism 122 is in a disengaged state (disconnected state).

As shown in FIGS. 24 and 25, when the piston 114b is in the first position H1, the valve component side opening 187 of the valve component 114i is positioned so as to overlap the piston opening 157 of the piston 114b at substantially the same position. Since the communication valve 116 is in the open state, the first piston internal flow path 151 formed by the first communication mechanism 145 is in the open state.
Further, as shown in FIG. 19, in the second piston internal flow path 152 formed by the second communication mechanism 146, the piston 114b is located at the first position H1, and the inlet portion 152a is outside the cylinder 14a and the water storage tank 10. Since it is located inside, it is in a closed state (a state in which communication between the pressure chamber 14g and the back pressure chamber 14h is not formed). The second piston internal flow path 152 communicates the back pressure chamber 14h with the inside of the water storage tank 10 outside the cylinder 14a, but in the standby state, the washing water does not exist on the back pressure chamber 14h side. Drainage is not performed through the internal flow path 152 of the second piston.
Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

Next, at time T11, when the user presses the cleaning button of the remote control device 6, the remote control device 6 transmits an instruction signal for cleaning the toilet bowl to the controller 28. In the flush 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 disengagement is detected by the motion sensor 8. A cleaning instruction signal is transmitted to the controller 28.

Upon receiving the instruction signal for cleaning the toilet bowl, the controller 28 operates the solenoid valve 20 (see FIG. 18) to disengage the solenoid valve side pilot valve 50 from the pilot valve opening. As a result, the pressure in the pressure chamber 36a is reduced, the main valve body 38 is separated from the valve seat 40, and the main valve body 38 is opened. When the water supply control device 18 is opened, the washing water flowing from the water supply pipe 32 is supplied to the hydraulic drive unit 114 via the water supply control device 18. As a result, as shown by the arrow F1 in FIG. 31, water supply from the inflow pipe 24a to the cylinder 14a is started, and the cylinder water supply is turned on. The washing water flowing from the inflow pipe 24a into the cylinder 14a hits the receiving portion 190, and the receiving portion 190 receives the flow of the washing water to rotate the valve constituent member 114i. At this time, the valve constituent member 114i is rotated in the second rotation direction B2 (see FIG. 26) and the rod 115 is rotated in the second rotation direction B2, so that the drain valve 12 and the rod 115 are connected. Is connected and the connection is established. The valve component 114i is rotated in the second rotation direction B2, for example, at an angle within the range of about 15 degrees to 45 degrees, more preferably at an angle of 30 degrees. Therefore, the valve constituent member 114i is rotated relative to the piston 114b, and the valve constituent member side opening 187 is located at a different position (shifted position) from the piston opening 157. Therefore, the internal flow path 151 of the first piston is closed, and the communication valve 116 is closed. As described above, the communication valve 116 is changed from the open state to the closed state when the supply of the washing water to the cylinder 14a is started when the piston 114b is located at the first position H1.

Therefore, the piston 114b of the hydraulic drive unit 114 is pushed up, the drain valve 12 is pulled up via the rod 115, and the washing water in the water storage tank 10 is discharged from the drain port 10a to the flush toilet body 2. That is, the drain valve 12 is driven by the driving force of the water pressure driving unit 114 based on the water supply pressure of tap water supplied through the water supply pipe 32, and the valve is opened. When the drain valve 12 is opened, the washing water (tap water) stored in the water storage tank 10 is discharged to the bowl portion 2a of the flush toilet body 2 through the drain port 10a, and the bowl portion 2a is washed. Will be done.
The second piston internal flow path 152 communicates the back pressure chamber 14h with the inside of the water storage tank 10 outside the cylinder 14a, but basically, the washing water does not exist on the back pressure chamber 14h side. , The drainage through the internal flow path 152 of the second piston is basically not done. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

Further, when the washing water in the water storage tank 10 is discharged, the water level in the water storage tank 10 is lowered below the predetermined water level L1, so that the water supply valve float 34 is lowered. As a result, the arm portion 42 (see FIG. 2) rotates, and the float side pilot valve 44 is opened. In the state where the float side pilot valve port (not shown) is opened, the pressure in the pressure chamber 36a does not increase even if the solenoid valve side pilot valve 50 is closed, so that the main valve body 38 The valve open state can be maintained. Therefore, the controller 28 energizes the solenoid valve 20 to open the main valve body 38, and when a predetermined time elapses and the water level in the water storage tank 10 drops, the energization of the solenoid valve 20 is stopped. As a result, the solenoid valve side pilot valve 50 is closed, but the float side pilot valve opening is opened, so that the main valve body 38 remains separated from the valve seat 40. That is, the controller 28 can open the main valve body 38 for a long time only by energizing the solenoid valve 20 for a short time.

At time T11, the water supply from the water supply control device 18 to the water pressure drive unit 114 is started (ON state), and the inflow of the washing water into the pressure chamber 14g of the cylinder 14a is started. As shown in FIG. 30, the washing water flowing into the pressure chamber 14g of the cylinder 14a starts the ascending of the piston 114b from the first position H1. When the ascending of the piston 114b is started, the rod 115 is elevated together with the piston 14b, and the clutch mechanism 122 is in the connected state. Therefore, immediately after the rod 115 starts to be pulled up, the rod 115 and the drain valve 12 are engaged with each other. Pull up the drain valve 12.

As shown in FIG. 18, between the times T11 and T12, in the first communication mechanism 145, the valve component side opening 187 is located at a position different from the piston opening 157, and the first piston internal flow path 151 is closed. The communication valve 116 is in the closed state. Therefore, the washing water flowing into the pressure chamber 14g of the cylinder 14a pushes up the piston 114b and moves it in the first direction D1. As described above, when the piston 114b moves in the first direction D1 (when the movement is started), the valve constituent member 114i is moved and the communication valve 116 is closed.

At time T12, when the piston 114b is pushed up and the rod 115 and the drain valve 12 are pulled up to the third position H3 which is a predetermined position (see FIG. 33), the first engaging portion 188 is second engaged. It begins to come into contact with the portion 192. The third position H3 is at a height lower than that of the second position H2. At this time, the inclined surface 188b of the chevron portion 188a of the first engaging portion 188 starts to contact the cylinder side inclined surface 192b of the cylinder side chevron portion 192a of the second engaging portion 192, and the chevron portion 188a is on the cylinder side. The rotation is started with respect to the chevron portion 192a. That is, the valve constituent member 114i is rotated in the second rotation direction B2, and is rotated to a posture in which the connection between the rod engaging portion 115a and the valve shaft engaging portion 112k is released. As a result, the engagement between the rod engaging portion 115a and the valve shaft engaging portion 112k is released, and the engagement of the clutch mechanism 122 is released. Therefore, the drain valve 12 is separated from the rod 115, and the drain valve 12 starts to descend. As a result, the rod 115 remains pushed upward together with the piston 114b, while the drain valve 12 descends due to its own weight. The engaged protrusion 12l (see FIG. 18) of the separated drain valve 12 engages with the engaging portion 26b (see FIG. 18) of the drain valve float mechanism 26, and the descent of the drain valve 12 is prevented. As a result, the drain port 10a of the water storage tank 10 remains open, and drainage from the water storage tank 10 is continued.

Here, when the water level in the water storage tank 10 drops to a second predetermined water level lower than the predetermined water level L1, the float portion 26a (see FIG. 20) of the drain valve float mechanism 26 descends, which causes the engaging portion 26b. , Move to the non-engaged position shown by the imaginary line in FIG. As a result, the engagement between the engaging protrusion 12l of the drain valve 12 and the engaging portion 26b is released, and the drain valve 12 begins to descend again. After that, the drain valve 12 closes the drain port 10a of the water storage tank 10, and the discharge of the washing water to the flush toilet body 2 is stopped. Even after the drain port 10a is closed, the valve seat 40 in the water supply control device 18 is in the opened state, so that the water supplied from the water supply pipe 32 flows into the hydraulic drive unit 114 and is driven by hydraulic pressure. Since the water flowing out from the portion 114 flows into the water storage tank 10 through the outflow pipe 124b, the water level in the water storage tank 10 rises.

At time T13, the valve constituent member 114i is rotated in the first rotation direction B1, and the valve constituent member side opening 187 of the valve constituent member 114i overlaps with the piston opening 157 at substantially the same position. As a result, the communication valve 116 is opened. Therefore, the first piston internal flow path 151 that communicates the pressure chamber 14g and the back pressure chamber 14h is formed and opened. Therefore, the washing water flows out from the pressure chamber 14g to the back pressure chamber 14h via the internal flow path 151 of the first piston, and flows out from the back pressure chamber 14h to the outflow pipe 124b. When the communication valve 116 is opened, the piston 114b is in the fourth position H4 (see FIG. 30).

At about the same time as when the communication valve 116 is opened, the inlet portion 152a reaches a position where it opens in the pressure chamber 14g. Therefore, the second piston internal flow path 152 that communicates the pressure chamber 14g and the back pressure chamber 14h is also formed and is in an open state. Therefore, the washing water flows from the pressure chamber 14g into the second piston internal flow path 152 through the inlet portion 152a, flows out from the second piston internal flow path 152 through the outlet portion 152b, and flows out to the back pressure chamber 14h. It is discharged from the pressure chamber 14h to the outflow pipe 124b. The fourth position H4 is located higher than the third position H3 and slightly lower than the second position H2. That is, the disengagement of the clutch mechanism 122 and the communication between the pressure chamber 14g and the outflow pipe 124b by the first communication mechanism 145 (or the second communication mechanism 146) are performed according to the displacement of the piston 114b, and the clutch mechanism 122 is used. It is a communication position where the pressure chamber 14g and the outflow pipe 124b are communicated by the first communication mechanism 145 (or the second communication mechanism 146) on the second position H2 side from the cutting position (third position H3) to be cut. There is a fourth position H4. While the piston 114b is in the position from the fourth position H4 to the second position H2, the inlet portion 152a is opened to the pressure chamber 14g, and the second piston internal flow path 152 is the pressure chamber 14g and the back pressure chamber 14h. Form a flow path for communicating with each other. Even after the time T13, the water supply of the washing water into the pressure chamber 14g is continued, and the piston 114b and the rod 115 continue to rise even after the clutch mechanism 122 is disengaged. The clutch mechanism 122 is in a disengaged state. The valve component 114i rises while being rotated. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T14, as shown in FIG. 34, when the piston 114b is further pushed up to reach the second position H2, the piston 114b has a back pressure chamber side protrusion 159 at the distal end 14k of the cylinder 14a. It is stopped in a state of being in contact with the protruding portion 114m, which is a protruding portion protruding from the surface. At this time, the first engaging portion 188 of the piston 114b is in a state of being engaged with the second engaging portion 192 of the cylinder 14a. Therefore, the rotation of the valve constituent member 114i is stopped at a predetermined position where the communication valve 116 is in the open state, as shown in FIG. 24. The space of the back pressure chamber 14h is still formed in a state where the piston 114b abuts on the protrusion 114m and stops. The protruding portion 14m abuts on the piston 14b and restricts the vertical sliding of the piston 14b to the second position H2. The protrusion 114m is formed in a region outside the radial direction of the drainage port and inside the cylinder. The protrusion 114m forms a vertical wall. The protrusion 114m forms a vertical wall surface so that the washing water flowing into the back pressure chamber 14h can easily flow from the protrusion 114m to the drain port side. The first communication mechanism 145 (or the second communication mechanism 146) flows out to the pressure chamber 14g while the supply of the washing water into the cylinder 14a is maintained even after the piston 114b reaches the second position H2. The state of communicating with the tube 124b is maintained.

The second position H2 is the position most distal to the first position H1 in the cylinder 14a, for example, the highest position. At this time, the water supply of the washing water into the pressure chamber 14g is continuously continued, and the piston 114b is continuously subjected to the pushing pressure, but the back pressure chamber side protrusion 159 is in contact with the protrusion 14m, and the pressure is further increased. It is stopped because it cannot be pushed up. Since the first piston internal flow path 151 is in the open state, the washing water flows out from the pressure chamber 14g to the back pressure chamber 14h via the first piston internal flow path 151, and flows out from the back pressure chamber 14h to the outflow pipe 124b. It is leaked to. Further, since the second piston internal flow path 152 is in the open state, the washing water flows from the pressure chamber 14g into the second piston internal flow path 152 through the inlet portion 152a, and the second piston internal flow path 152. It flows out from the back pressure chamber 14h through the outlet portion 152b to the back pressure chamber 14h, and flows out from the back pressure chamber 14h to the outflow pipe 124b. Therefore, the water pressure on the pressure chamber 14g side and the water pressure on the back pressure chamber 14h side are almost equal. Since a part of the washing water flowing out to the outflow pipe 124b flows into the water storage tank 10, the water level in the water storage tank 10 rises. The clutch mechanism 122 is in a disengaged state. Further, the drainage / vacuum break valve 30 due to the water flowing back from the inflow pipe 24a is not drained into the water storage tank 10 (OFF state).

At time T15, when the water level of the wash water in the water storage tank 10 rises to the predetermined water level L1, the water supply valve float 34 (see FIG. 18) rises, the float side pilot valve 44 is moved via the arm portion 42, and the float is floated. The side pilot valve 44 is closed. As a result, the float side pilot valve port (not shown) and the pilot valve port (not shown) of the main valve body 38 are closed, so that the pressure in the pressure chamber 36a rises and the main valve body 38 valve. Sit in the seat 40. As a result, the water supply from the water supply control device 18 to the cylinder 14a of the hydraulic drive unit 114 is stopped, and the state is turned off. The piston 114b of the hydraulic drive unit 114 is gradually pushed down by gravity as the supply of the washing water to the pressure chamber 14g is stopped and the pushing force of the piston 114b is reduced. When the piston 114b moves in the second direction D2, the valve component 114i is moved relative to the piston 114b, so that the communication valve 116 is opened. The direction in which the valve constituent member 114i is moved relative to the piston 114b so as to open the communication valve 116 is a direction different from the direction in the second direction D2 of the movement of the piston 114b.

At time T15, the first piston internal flow path 151 and the second piston internal flow path 152 form a flow path that allows the pressure chamber 14g and the back pressure chamber 14h to communicate with each other. However, as soon as the piston 114b starts descending, the inlet portion 152a is descended from the inside of the pressure chamber 14g to a position facing the inner wall of the through hole 14f, so that the second piston internal flow path 152 is closed. However, since the valve constituent member 114i moves toward the first position H1 in the cylinder 14a in a state where it does not rotate substantially, the first piston internal flow path 151 still continues to be in the open state. That is, the communication valve 116 maintains an open state when the piston 114b moves toward the first position H1. Therefore, the piston 114b can be more easily moved toward the first position H1 in the cylinder 14a. After that, the piston 114b and the rod 115 continue to descend. The clutch mechanism 122 is in a disengaged state.

At time T15, when the water supply from the water supply control device 18 to the cylinder 14a is stopped, the drainage by the water flowing back from the inflow pipe 24a / the drainage from the vacuum break valve 30 into the water storage tank 10 is started, and the pressure chamber 14g It is in a drainage state (ON state) in which the washing water inside is drained from the drainage / vacuum break valve 30 into the water storage tank 10 via the inflow pipe 24a.

At time T16, the lower end of the rod 115 descends to the vicinity of the upper end of the valve shaft 12a. The rod engaging portion 115a of the rod 115 passes between the first slope portion 112i and the second slope portion 112j and descends. At this time, the rod engaging portion 115a is in a state parallel to the first slope portion 112i and the second slope portion 112j, and the connection between the rod engaging portion 115a and the valve shaft engaging portion 112k is released. It is in a state of being. Since the second piston internal flow path 152 forms a flow path connecting the back pressure chamber 14h and the inside of the water storage tank 10 outside the cylinder 14a, the washing water in the back pressure chamber 14h is efficiently put into the water storage tank 10. The piston 114b can be operated efficiently by draining water.

At time T17, the rod 115 is further lowered, and the rod engaging portion 115a abuts on the top of the valve shaft 12a and is stopped (see FIG. 29). At this time, the rod engaging portion 115a is in a state parallel to the first slope portion 112i and the second slope portion 112j, and the connection between the rod engaging portion 115a and the valve shaft engaging portion 112k is released. It is in a state of being. In this way, the clutch mechanism 122 returns to the standby posture. At this time, as shown in FIG. 19, the piston 114b ends the descending operation and returns to the first position H1 in the cylinder 14a. At times T15 to T17, the water supply from the water supply control device 18 to the cylinder 14a remains stopped. At times T15 to T17, the first piston internal flow path 151 is in an open state. Further, at times T15 to T17, the washing water in the pressure chamber 14g is drained from the drain / vacuum break valve 30 into the water storage tank 10 through the inflow pipe 24a, and the inner wall and rod of the through hole 14f of the cylinder 14a. It flows out from the gap 14d between 115 and this water flows into the water storage tank 10. As a result, one toilet bowl cleaning is completed, and the flush toilet device 101 returns to the standby state for toilet bowl cleaning.

The embodiment for carrying out the present invention is not limited to the above, and further other modifications can be applied.
For example, the hydraulic drive unit 114 of the second embodiment of the present invention may be configured to connect the rod 115 to the piston 114b. Regarding this modification, the same parts as those in the second embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 36 is a schematic cross-sectional view showing a modified example of the hydraulic drive unit according to the second embodiment of the present invention. FIG. 36 shows a state in which the communication valve 116 is closed and the piston 114b is in the process of rising.
The rod 115 is not connected to the valve component 114i but is connected to the piston 114b. Since the rod 115 is connected to the piston 114b, the rod 115 is formed so as not to rotate in accordance with the rotation of the valve constituent member 114i. Also in this modification, the hydraulic drive unit 114 further includes a first communication mechanism 145 that communicates the pressure chamber 14g and the outflow pipe 124b after the clutch mechanism 22 is disengaged. The first communication mechanism 145 provides a first piston internal flow path 151 that communicates the pressure chamber 14g and the back pressure chamber 14h when the valve component side opening 187 (not shown) is located at the same position as the piston opening 157. By forming the communication valve 116, the communication valve 116 is opened, and the pressure chamber 14g and the outflow pipe 124b are communicated with each other via the first piston internal flow path 151 and the back pressure chamber 14h.
On the other hand, in the first communication mechanism 145, when the valve component side opening 187 is located at a position different from the piston opening 157, the first piston internal flow path 151 that communicates the pressure chamber 14g and the back pressure chamber 14h is closed. The communication valve 116 is closed, and the communication valve 116 is closed.

In this modification, the structure is such that the second piston internal flow path 152 in which the inside of the rod 115 and the inside of the first engaging portion 188 communicate with each other is not formed. That is, the hydraulic drive unit 114 has a structure in which the second communication mechanism 146 that communicates the pressure chamber 14g and the outflow pipe 124b is omitted after the clutch mechanism 22 is disengaged. As described above, the hydraulic drive unit 114 may omit the second communication mechanism 146 while the first communication mechanism 145 is provided.

In this modification, the rod 115 is not rotated as described above. Therefore, the clutch mechanism 22 that connects the drain valve 12 and the rod 115 is configured by a clutch mechanism that does not assume a rotational operation about the central axis of the rod 115. Such a clutch mechanism 22 is provided at the connection portion between the lower end of the rod 115 and the drain valve 12, and the rod 115 and the drain valve 12 are connected by the clutch mechanism 22, and the rod 115 and the drain valve 12 are connected at a predetermined timing. The connection is broken. The clutch mechanism 22 is configured so that when the drain valve 12 is lifted to a predetermined position, the valve shaft 12a of the drain valve 12 is disconnected from the rod 115 by the regulating portion 70. When the clutch mechanism 22 is disengaged, the drain valve 12 is not linked to the movements of the piston 114b and the rod 115, and descends due to gravity while resisting buoyancy.

Further, in the second embodiment, the valve constituent member 114i is configured to be rotated relative to the piston 114b, but as another modification, the valve constituent member 114i is configured with respect to the piston 114b. It suffices if it is configured to be relatively moved. For example, the valve component 114i can be configured to be translated relative to the piston 114b.
Therefore, when the valve component side opening 187 is located at the same position as the piston opening 157 due to the valve component member 114i being moved relatively in parallel with the piston 114b, the first communication mechanism 145 is the pressure chamber 14g. By forming the first piston internal flow path 151 that communicates the pressure chamber 14h with the back pressure chamber 14h, the communication valve 116 is opened, and the pressure chamber 14g and the outflow pipe 124b are connected to the first piston internal flow path 151 and the back pressure. Communicate through the chamber 14h.
On the other hand, when the valve component side opening 187 is located at a position different from the piston opening 157 due to the valve component member 114i being translated relative to the piston 114b, the first communication mechanism 145 is a pressure chamber. The first piston internal flow path 151 that communicates 14 g with the back pressure chamber 14h is in a closed state and is not formed, and the communication valve 116 is in a closed state.

Further, in such another modification, the valve constituent member 114i may be configured to move away from the piston 114b while moving relatively parallel to the piston 114b. By moving the valve constituent member 114i away from the piston 114b while translating it relative to the piston 114b, the first communication mechanism 145 causes the communication valve 116 (that is, that is, at each position before or after the movement). A switching structure can be formed so as to open or close the internal flow path 151) of the first piston. As described above, the communication valve 116 can be opened or closed by moving the valve constituent member 114i not only with respect to the piston 114b but also with respect to the piston 114b.

According to the washing water tank device 4 according to the second embodiment of the present invention described above, the hydraulic drive unit 114 communicates the pressure chamber 14g and the back pressure chamber 14h with the piston 114b in the second position H2. The first communication mechanism 145 or the second communication mechanism 146 forming the first piston internal flow path 151 or the second piston internal flow path 152 is provided on the end side of the cylinder 14a with respect to the second position H2 of the piston 114b. The cylinder 14a is provided with a connection portion 114o extending from a drainage port through which the wash water is discharged and to which an outflow pipe 24b is connected. As a result, with a relatively simple configuration, with the piston 114b at the second position H2, the washing water of the pressure chamber 14g is discharged to the back pressure chamber 14h and the connection portion 114o, and the pressure of the washing water of the pressure chamber 14g is reached. The piston 114b can easily return from the second position H2 to the first position H1 side, and the outlet of the base of the connection portion 114o is temporarily closer to the first position H1 than the second position H2. When the outlet at the base of the connecting portion 114o is provided on the end side of the cylinder 14a with respect to the second position H2, the flow of the washing water toward the outlet is the piston 114b. It does not hinder sliding and can improve the stability of the sliding operation of the piston 114b.

Further, the second embodiment of the present invention is the flush toilet device 101, characterized in that it has a flush toilet main body 2 and a washing water tank device 104 that can easily reduce the pressure of the washing water in the pressure chamber. There is.

1 Washing toilet device 4 Washing water tank device 10 Water storage tank 10a Drain port 12 Drain valve 14 Hydraulic drive unit 14a Cylinder 14b Piston 14g Pressure chamber 14h Back pressure chamber 22 Clutch mechanism 36a Pressure chamber 46 Communication mechanism 52 Piston internal flow path 101 Water washing toilet Device 104 Washing water tank device 114 Hydraulic drive unit 114b Piston 116 Communication valve 122 Clutch mechanism

Claims (5)

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 into which the supplied washing water flows in, and
A piston slidably arranged in the cylinder, the piston divides the inside of the cylinder into a pressure chamber and a back pressure chamber, and the piston further determines the pressure of the washing water flowing into the pressure chamber. With the piston, which is moved from the first position to the second position by
A communication mechanism that forms a piston internal flow path that communicates the pressure chamber and the back pressure chamber with the piston in the second position.
A connection portion provided on the end side of the cylinder with respect to the second position of the piston, extending from an outlet for draining the washing water in the cylinder, and to which an outflow pipe is connected.
Equipped with a wash water tank device. The cylinder has a cylindrical first member that opens toward the end side of the cylinder, and the cylinder.
The second member is a cylindrical second member connected to the first member, and the second member includes the second member that forms a lid portion that covers the opening of the first member.
The washing water tank device according to claim 1, wherein the connecting portion extending from the outlet is provided on the side wall of the second member. The washing water tank device according to claim 2, wherein a mounting structure of the second member and the first member is formed so that the connection portion is provided in a direction selected from a plurality of types of directions. The second member is a protrusion that comes into contact with the piston and restricts the sliding of the piston to the second position, and the protrusion is a protrusion with respect to the central axis of the cylinder. The wash water tank apparatus according to claim 2 or 3, further comprising the protrusion, which is formed in the opposite region. It ’s a flush toilet device,
The washing water tank device according to any one of claims 1 to 4.
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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