JP2022043975A - Washing water tank device and flush toilet bowl device equipped with the same - Google Patents

Abstract

To provide a washing water tank device that can return to a state where the next toilet bowl washing can be executed in a short time while opening the drain valve using water pressure.SOLUTION: A washing water tank device (4) comprises a water storage tank (10), a drain valve (12), a drain valve hydraulic drive unit (14) that drives the drain valve using water pressure of the supplied water, and a drainage/vacuum break valve device (30) provided on the upstream side of this drain valve hydraulic drive unit and supplying water supplied from the upstream side to the drain valve hydraulic drive unit on the downstream side. The drain valve hydraulic drive unit comprises a cylinder (14a) into which the water from the drainage/vacuum break valve device flows, and a piston (14b) that is moved by the pressure of the water flowing into the cylinder and moves the drain valve. The drainage/vacuum break valve device includes a valve body that operates to open the upstream side to the atmosphere and at the same time drain the water flowing back from the drain valve hydraulic drive unit when the water supply from the upstream side is stopped.SELECTED DRAWING: Figure 2

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.

Japanese Patent Application Laid-Open No. 2009-257061 (Patent Document 1) describes a low tank device. In this low tank device, a hydraulic cylinder device having a piston and a drainage portion is arranged inside the low tank provided with a drain valve, and the piston and the drain valve are connected by a connecting portion. Further, when the washing water in the low tank is discharged, the solenoid valve is opened to supply water to the penstock cylinder device and push up the piston. Since the piston is connected to the drain valve by the connecting portion, the drain valve is pulled up by the movement of the piston, the drain valve is opened, and the washing water in the low tank is discharged. The water supplied to the penstock cylinder device flows out from the drainage portion and flows into the low tank.

Further, when the drain valve is closed, the solenoid valve is closed to stop the supply of water to the penstock. As a result, the pushed-up piston descends, and the drain valve returns to the closed position due to its own weight. At this time, since the water in the penstock cylinder device gradually flows out from the drainage portion, the piston slowly descends and the drain valve gradually returns to the closed position.

Japanese Unexamined Patent Publication No. 2009-25761

However, in the low tank device described in Patent Document 1, it takes a long time for the piston of the hydraulic cylinder device to return to the original position, and it takes a long time after one toilet bowl cleaning to enable the next toilet bowl cleaning. There is a problem that it is necessary. That is, in the low tank device described in Patent Document 1, when water flows into the cylinder of the hydraulic cylinder device, the piston is pushed up and the drain valve is pulled up. After the drain valve is pulled up, the water that has flowed into the cylinder flows out from the gap (drainage part) between the rod part attached to the piston and the through hole provided in the cylinder, and the piston is lowered. It returns to the original position. Since the gap between the rod portion and the through hole is narrow, it takes a relatively long time for the water in the cylinder to be discharged. Further, if this gap is increased, the pressure in the cylinder is unlikely to rise, and it is difficult to push up the piston when cleaning the toilet bowl. Therefore, it is not possible to simply set a large gap.

Further, Patent Document 1 also describes a low tank device in which a drain pipe is connected to the cylinder of a hydraulic cylinder device and a drain pipe solenoid valve is provided in the drain pipe to discharge water in the cylinder. According to this low tank device, after the drain valve is pulled up, the water in the cylinder can be discharged immediately through the drain pipe by opening the drain pipe solenoid valve. However, this type of low tank device requires a dedicated solenoid valve to discharge the water in the cylinder, which causes a problem that the structure of the device is complicated and the penstock cylinder device becomes large.

Therefore, in the present invention, while opening the drain valve using the supplied water pressure, the water in the hydraulic cylinder device (drain valve hydraulic drive unit) is quickly discharged by a simple mechanism, and the next time in a short time. It is an object of the present invention to provide a washing water tank device capable of returning to a feasible state for washing a toilet bowl, and a water washing toilet device equipped with the washing water tank device.

In order to solve the above-mentioned problems, the present invention is a washing water tank device that supplies washing water to a washing urinal, and stores the washing water to be supplied to the washing urinal and flushes the stored washing water with water. Using a water storage tank with a drain port for discharging to the toilet, a drain valve that opens and closes the drain port to supply and stop the wash water to the flush toilet, and the water supply pressure of the supplied water, A drain valve hydraulic drive unit that drives the drain valve, and a drain / vacuum break valve that is provided on the upstream side of the drain valve hydraulic drive unit and supplies water supplied from the upstream side to the drain valve hydraulic drive unit on the downstream side. It has a device, and the drain valve hydraulic drive unit is slidably arranged in a cylinder into which water supplied through the drain / vacuum break valve device flows, and water flowing into the cylinder. It has a piston, which is moved by pressure and moves the drain valve, and the drain / vacuum break valve device opens the upstream side to the atmosphere when the water supply from the upstream side is stopped, and at the same time, the drain valve water pressure. It is characterized by being provided with a valve body that operates to drain water that has flowed back from the drive unit.

In the present invention configured as described above, the drain valve hydraulic drive unit drives the drain valve by using the water supply pressure of the supplied water to open the drain port of the water storage tank, and the stored washing water is stored. Is discharged to the flush toilet. A drainage / vacuum break valve device is provided on the upstream side of the drain valve hydraulic drive unit, and this drain / vacuum break valve device supplies water supplied from the upstream side to the drain valve hydraulic drive unit on the downstream side. The drain valve hydraulic drive unit has a cylinder and a piston, and when the water supplied through the drain / vacuum break valve device flows into the cylinder, the pressure of the water flowing into the piston slidably arranged in the cylinder. Moved by, and moved the drain valve. When the supply of water from the upstream side is stopped, the drainage / vacuum break valve device opens the upstream side to the atmosphere and at the same time drains the water flowing back from the drain valve hydraulic drive unit.

According to the present invention configured in this way, when the supply of water from the upstream side is stopped, the drainage / vacuum break valve device drains the water flowing back from the drainage valve hydraulic drive unit, so that it is a simple mechanism. The water that has flowed into the cylinder of the drain valve hydraulic drive unit can be discharged. As a result, the piston can be returned to the initial position at an early stage, and can be returned to a state in which the next toilet bowl cleaning can be performed in a short time. Further, according to the present invention configured as described above, the drainage / vacuum break valve device opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, so that the drainage / vacuum break valve When the upstream side of the device becomes negative pressure, the air is sucked in and water can be prevented from flowing back to the upstream side.

In the present invention, preferably, the drainage / vacuum break valve device is an inlet / outlet for inflowing supplied water, an outlet for supplying the inflowed water to the drainage valve hydraulic drive unit, and an intake / drainage opened / closed by a valve body. It has an opening, the inlet is provided above the outlet, and the intake / drain opening is formed on a vertical or sloping surface.

According to the present invention configured in this way, since the inflow port is provided above the outflow port, the water flowing back from the drain valve hydraulic drive unit to the outflow port is surely flowed back to the inflow port. Can be prevented. Further, since the intake / drainage opening opened and closed by the valve body is formed on a vertical surface or an inclined surface, the water flowing back from the drainage valve hydraulic drive unit to the outlet is discharged from the lower part of the intake / drainage opening at the same time. The air can be sucked in from the upper part of the intake / drainage opening, and drainage and intake can be performed at the same time.

In the present invention, preferably, the area of the intake / drainage opening of the drainage / vacuum break valve device is larger than the area of the outlet of the drainage / vacuum break valve device.
According to the present invention configured as described above, since the area of the intake / drainage opening is larger than the area of the outlet of the drainage / vacuum break valve device, the water flowing back from the drainage valve hydraulic drive unit to the outlet is drained. However, inhalation of air can also be reliably performed.

In the present invention, preferably, the intake / drainage opening of the drainage / vacuum break valve device is formed longer in the vertical direction than in the horizontal direction.
According to the present invention configured in this way, the intake / drainage openings are formed longer in the vertical direction than in the horizontal direction, so that the backflow of water can be reliably discharged and the air can be sucked in with a small opening area. can do.

In the present invention, preferably, the valve body of the drainage / vacuum break valve device is rotatably provided around a predetermined central axis, and the intake / drainage opening is opened / closed by being rotated.
According to the present invention configured as described above, since the valve body of the drainage / vacuum break valve device opens and closes the intake / drainage opening by rotating, the opening / closing mechanism of the intake / drainage opening is compactly configured. It is possible to expand the degree of freedom in designing the drainage / vacuum break valve device.

In the present invention, preferably, a predetermined central axis around which the valve body is rotated is arranged outside the vertical projection plane of the intake / drain opening.
According to the present invention configured in this way, since the central axis around which the valve body is rotated is arranged outside the vertical projection plane of the intake / drain opening, the edge of the intake / drain opening and the valve body When the packing for sealing the space is provided, the crushing allowance of the packing can be surely secured, and the intake / drainage opening can be surely closed.

In the present invention, preferably, the intake / drainage opening is formed so that its lower edge extends in the horizontal direction, and the water flowing back from the drainage valve hydraulic drive unit to the drainage / vacuum break valve device is stored beyond the lower edge. It is discharged into the tank.

According to the present invention configured in this way, the lower edge of the intake / drainage opening extends in the horizontal direction, and the backflowing water is discharged beyond this lower edge into the water storage tank. It is possible to secure a large flow path area for the drainage flowing over the drainage, and it is possible to suppress the rise in the water level in the drainage / vacuum break valve device.

In the present invention, preferably, the intake / drainage opening is formed so that its upper edge extends in the horizontal direction.
According to the present invention configured in this way, since the upper edge of the intake / drainage opening extends in the horizontal direction, the outside air is blown through the intake / drainage opening even when water is discharged from the intake / drainage opening. A large area of the flow path for inhalation can be secured, and the air can be reliably inhaled.

In the present invention, the valve body is preferably in a standby position in which the position of the center of gravity of the valve body is lowered most in a state where water is not supplied to the drainage / vacuum break valve device.
According to the present invention configured as described above, in the state where water is not supplied to the drainage / vacuum break valve device, the valve body is in the standby posture in which the position of the center of gravity is lowered most, so that the valve body has a simple structure and its own weight. Allows the valve body to return to the standby position.

In the present invention, the valve body preferably includes a weight.
According to the present invention configured as described above, since the valve body is provided with a weight, the gravity acting on the valve body can be increased, and the valve body can be reliably returned to the standby posture with a simple structure. can.

In the present invention, preferably, the drainage / vacuum break valve device comprises an urging spring, which urges the valve body in the direction of opening the intake / drainage opening.
According to the present invention configured as described above, since the valve body is provided with an urging spring that urges the valve body in the direction of opening the intake / drain opening, the supply of water to the drain / vacuum break valve device is stopped. When this is done, the intake / drainage openings can be reliably opened.

In the present invention, preferably, the urging spring is configured so that the increase in the urging force with respect to the increase in the amount of deformation increases as the amount of deformation increases.
First, since hydrostatic pressure acts on the valve body when the intake / drain opening is closed, a large force is required to open it, while when the intake / drain opening is opened even a little, the valve is valved. Since hydrostatic pressure does not act on the body, the valve body can be moved with a small force. According to the present invention configured as described above, since the urging spring is configured so that the increase in the urging force with respect to the increase in the amount of deformation increases as the amount of deformation increases, the intake / drainage opening is closed. In the state where the urging spring is deformed most, the urging force in the direction of opening the valve body becomes the largest. Therefore, when the supply of water to the drainage / vacuum break valve device is stopped, the valve body can be easily opened. On the other hand, in the region where the deformation amount of the urging spring is small, the urging force is small, so that the valve body can be easily moved and closed when the water supply to the drainage / vacuum break valve device is started.

In the present invention, preferably, the urging spring is configured so that the urging force is not applied to the valve body when the intake / drainage opening is opened by a predetermined amount or more.
According to the present invention configured as described above, when the intake / drainage opening is opened by a predetermined amount or more, no urging force acts on the valve body, so that when water supply to the drainage / vacuum break valve device is started. , The valve body can be easily moved and closed. On the other hand, when the opening of the intake / drainage opening is less than a predetermined amount, a urging force acts on the valve body, so that when the supply of water to the drainage / vacuum break valve device is stopped, the valve body can be easily opened. It can be opened.

In the present invention, it is preferable to further have a flow rate suppressing means for suppressing the flow rate of water flowing back from the drain valve hydraulic drive unit to the drain / vacuum break valve device.
According to the present invention configured as described above, the flow rate suppressing means suppresses the flow rate of the water flowing back to the drainage / vacuum break valve device, so that a large flow rate of water flows back from the drainage valve hydraulic drive unit. It is possible to prevent the intake / drainage opening from becoming full and the outside air from being unable to be sucked.

In the present invention, it is preferable to further operate by a water wheel rotated by the flow of supplied water, a generator provided with a power generation unit that generates power by the rotation of the water wheel, and the power generated by the generator. It has a water supply control device that controls water supply and stop to the drainage / vacuum break valve device, and the drain valve hydraulic drive unit is arranged so as to surround at least a part of the drain valve in a plan view. The generator is located above the water stop level in the water storage tank, and the water drained from the drain / vacuum break valve device is in the water storage tank in the left-right direction in the plan view. It is located on the opposite side of the outer shell to the landing position where it lands on the water surface.

In the present invention configured as described above, the generator is arranged above the water stop water level in the water storage tank, and the water discharged from the drainage / vacuum break valve device in the left-right direction in the plan view. Is located on the opposite side of the outer shell to the water landing position in the water storage tank. As a result, the water flowing out from the drainage / vacuum break valve device lands on the water surface in the water storage tank, and the scattered water is blocked by the outer shell portion, so that the water in the generator can be suppressed.

In the present invention, preferably, when the inside of the water storage tank is divided into the left side region, the central region, and the right side region in the left-right direction in a plan view, the generator is in a region different from the region to which the water landing position belongs. Is located in.

In the present invention configured as described above, since the generator is arranged in a region different from the region to which the landing position belongs among the left side region, the central region, and the right side region in the plan view, the water landing is performed. A relatively large distance between the position and the generator can be secured. As a result, it is possible to effectively prevent the water flowing out from the drainage / vacuum break valve device from landing on the water surface in the water storage tank and the scattered water from being applied to the generator.

In the present invention, the water landing position is preferably located in either the left side region or the right side region in the water storage tank in a plan view, and the generator is located in the left side region or the right side region in the water storage tank in a plan view. It is located on one of the other.

In the present invention configured as described above, the landing position of the water flowing out from the drainage / vacuum break valve device is located in either the left side region or the right side region in the water storage tank, whereas the generator is on the left side. It is located on the other side of the area or the right side area. Therefore, it is possible to secure a relatively large distance between the landing position in the water storage tank and the generator, and the water flowing out from the drainage / vacuum break valve device landed on the water surface in the water storage tank and scattered. It is possible to effectively prevent water from splashing on the generator.

In the present invention, preferably, the generator is arranged on the opposite side of the water landing position with the outer shell portion of the drain valve hydraulic drive portion in the front-rear direction.

In the present invention configured as described above, since the generator is arranged on the opposite side of the landing position of the water flowing out from the drainage / vacuum break valve device with the outer shell portion in the front-rear direction, the drainage is drained. / The water flowing out from the vacuum break valve device lands on the landing position and the scattered water can be blocked by the outer shell portion, and the water exposure of the generator can be effectively suppressed.

In the present invention, preferably, the cylinder of the drain valve hydraulic drive portion is provided above the outer shell portion.

In the present invention configured as described above, since the cylinder of the drain valve hydraulic drive unit is provided above the outer shell portion, the water flowing out from the drainage / vacuum break valve device lands on the landing position and scatters. The drained water can also be blocked by the cylinder, and the water exposure of the generator can be suppressed more effectively.

Further, the present invention is a water-washing urinal, which is characterized by having a washing water tank device of the present invention and a water-washing urinal that is washed with the washing water supplied from the washing water tank device.

According to the present invention, while opening the drain valve using the supplied water pressure, the water in the drain valve hydraulic drive unit is quickly discharged by a simple mechanism, and the next toilet bowl cleaning can be executed in a short time. It is possible to provide a washing water tank device capable of returning to a normal state, 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 drain valve hydraulic drive part and the drain valve provided in the washing water tank apparatus by 1st Embodiment of this invention, and shows the state in which the piston of the drain valve water pressure drive part is in the first position lowered. It is sectional drawing of the drain valve hydraulic drive part and the drain valve provided in the washing water tank apparatus by 1st Embodiment of this invention, and shows the state in which the piston of the drain valve water pressure drive part is in the raised 2nd position. It is sectional drawing of the drain valve hydraulic pressure drive part and the drain valve provided in the washing water tank apparatus by 1st Embodiment of this invention, and shows the state which the drain valve is held by the drain valve float mechanism. It is an exploded perspective view which shows by disassembling the component constituting the clutch mechanism 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 a perspective view of the drainage / vacuum break valve device provided in the washing water tank device according to 1st Embodiment of this invention. It is sectional drawing of the drainage / vacuum break valve device provided in the washing water tank device according to 1st Embodiment of this invention, and shows the state which water supply is not performed from a water supply control device. It is sectional drawing of the drainage / vacuum break valve device provided in the washing water tank device according to 1st Embodiment of this invention, and shows the state which water supply is performed from a water supply control device. It is a figure for demonstrating the force acting on the flap valve body of the drainage / vacuum break valve device provided in the washing water tank device according to 1st Embodiment of this invention in each operation state. It is a perspective view of the drainage / vacuum break valve device provided in the washing water tank device according to the 2nd Embodiment of this invention. It is sectional drawing of the drainage / vacuum break valve device provided in the washing water tank device according to the 2nd Embodiment of this invention, and shows the state which water supply is not performed from a water supply control device. It is sectional drawing of the drainage / vacuum break valve device provided in the washing water tank device according to the 2nd Embodiment of this invention, and shows the state which water supply is performed from a water supply control device. It is a perspective view of the drainage / vacuum break valve device provided in the washing water tank device according to the 3rd Embodiment of this invention. It is a perspective view showing a part of the case of the drainage / vacuum break valve device provided in the washing water tank device according to the third embodiment of the present invention. It is a perspective view showing a part of the case of the drainage / vacuum break valve device provided in the washing water tank device according to the third embodiment of the present invention. It is a horizontal sectional view of the drainage / vacuum break valve device provided in the washing water tank device according to the third embodiment of the present invention. It is a front sectional view which shows the schematic structure of the washing water tank apparatus according to 4th Embodiment of this invention. It is a top view which shows the schematic structure of the washing water tank apparatus according to 4th Embodiment of this invention. It is sectional drawing which shows the typical structure of a normal negative pressure breaking valve.

Next, a flush water tank device according to an 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. 3 to 5 are cross-sectional views of a drain valve hydraulic drive unit and a drain valve provided 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 is mounted on a flush toilet main body 2 which is a flush toilet and a rear portion of the flush toilet main body 2, according to the first embodiment of the present invention. It is composed of a washing water tank device 4 according to a form. 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 discharges the washing water stored inside to the water washing toilet main body 2 based on the instruction signal from the remote control device 6 or the motion sensor 8, and the washing water is used to discharge the washing water to the bowl portion. It is configured to wash 2a. 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.

Next, as shown in FIG. 2, the washing water tank device 4 opens and closes a water storage tank 10 for storing wash water to be supplied to the water washing urinal main body 2 and a drain port 10a provided in the water storage tank 10. It has a drain valve 12 and a drain valve hydraulic pressure drive unit 14 for driving the drain valve 12. Further, the washing water tank device 4 includes a water supply control device 18 for controlling the water supply to the drain valve hydraulic drive unit 14 and the water storage tank 10, and a solenoid valve 20 attached to the water supply control device 18 to the water storage tank 10. Have inside.

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.

Further, as shown in FIG. 2, a drainage / vacuum break valve device 30 is provided in the inflow pipe 24a between the water supply control device 18 and the drainage valve hydraulic drive unit 14.
When the water supply from the water supply control device 18 is stopped, the drainage / vacuum break valve device 30 sucks the outside air into the inflow pipe 24a and the water remaining in the cylinder 14a of the drainage valve hydraulic drive unit 14 or the like. Is discharged from the inflow pipe 24a into the water storage tank 10. The structure and operation of the drainage / vacuum break valve device 30 will be described later.

Further, as shown in FIG. 2, the water supply control device 18 controls water supply to the drain valve hydraulic drive unit 14 based on the operation of the solenoid valve 20, and also controls water supply and stop to the water storage tank 10. It is configured. 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 drain valve hydraulic drive unit 14, and is connected based on the instruction signal from the controller 28. It controls the supply and stop of the water supplied from the water supply pipe 32 to the drain valve hydraulic drive unit 14. In the present embodiment, the entire amount of the water flowing out from the water supply control device 18 is supplied to the drain valve hydraulic drive unit 14 through the inflow pipe 24a. Further, most of the water supplied to the drain valve 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 passes through the overflow pipe 10b. It is branched into a portion that flows into the flush toilet body 2.

Further, an orifice 24d, which is a flow rate suppressing means, is provided in the middle of the inflow pipe 24a between the drainage / vacuum break valve device 30 and the drainage valve hydraulic drive unit 14. The orifice 24d is a throttle portion provided inside the inflow pipe 24a, and is configured so that the cross-sectional area of the flow path gradually decreases from the upstream side to the downstream side. The orifice 24d is configured to suppress the flow rate of water flowing in the inflow pipe 24a, and in particular, is configured to suppress the flow rate of water flowing back from the drain valve hydraulic drive unit 14 to the drain / vacuum break valve device 30. ing.

On the other hand, the water supplied from the tap water is passed through a water stop valve 32a arranged on the outside of 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 drain valve 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.

Further, a water supply valve float 34 is also connected to the water supply control device 18, and is configured to set the water level in the water storage tank ₁₀ to a predetermined water stop 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 a predetermined water stop water level L ₁ , the water supply control device 18 to the drain valve water pressure drive unit 14 It is configured to stop the water supply to.

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 lower portion and a connection portion of the drainage / vacuum break valve device 30 on one side, and the main body portion 36 is a member provided with a connection portion of the drainage / vacuum break valve device 30 on the opposite side surface of the drainage / vacuum break valve device 30. The solenoid valve 20 is configured to be attached. Further, a valve seat 40 is formed inside the main body portion 36, and the valve seat 40 communicates with the drainage / vacuum break valve device 30. Further, a main valve body 38 is arranged inside the main body portion 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 drainage / vacuum break valve device 30.

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.

On the other hand, the water supply valve float 34 is supported by the arm portion 42, and the 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 stop level L ₁ , the water supply valve float 34 is pushed upward, and the float side pilot valve 44 is accompanied by the float side pilot of the pressure chamber 36a. The valve opening (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, when the water level in the water storage tank 10 is at the predetermined water stop level L ₁ and the solenoid valve 20 is not energized and the toilet bowl is in standby for cleaning, the pilot valve port of the main valve body 38 (not shown). ) And the float-side pilot valve port (not shown) of the main body 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 stop level L ₁ , the water supply valve float 34 is lowered, and the float side pilot valve 44 opens the float side pilot valve port (not shown). Open the valve. 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 structure of the drain valve hydraulic drive unit and the drain valve will be described with reference to FIGS. 3 to 5. FIG. 3 is a cross-sectional view of the drain valve hydraulic drive unit 14 and the drain valve 12, showing a state in which the piston of the drain valve hydraulic drive unit 14 is in the lowered first position. FIG. 4 is a cross-sectional view of the drain valve hydraulic drive unit 14 and the drain valve 12, showing a state in which the piston of the drain valve hydraulic drive unit 14 is in the raised second position. FIG. 5 is a cross-sectional view of the drain valve hydraulic drive unit 14 and the drain valve 12, showing a state in which the drain valve 12 is held by the drain valve float mechanism.

As shown in FIGS. 3 and 4, the drain valve 12 is a linearly acting valve body arranged to open and close the drain port 10a, and has a rod-shaped valve shaft 12a and a valve body attached to the lower end thereof. It is composed of a part 12b. 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 drain valve hydraulic pressure drive unit 14 is provided above the drain valve 12, and is configured to drive the drain valve 12 by using the supply pressure of the washing water supplied from the water supply. Specifically, the drain valve hydraulic drive unit 14 is slidably arranged in a cylinder 14a into which water supplied from the water supply control device 18 (FIG. 2) via the inflow pipe 24a flows in, and in the cylinder 14a. It also has a piston 14b. Further, a rod 15 which is a driving member is attached to the lower surface of the piston 14b, and the rod 15 projects from the lower end of the cylinder 14a and extends toward the drain valve 12 (FIG. 3). 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.

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 cylindrical member, and its axis is arranged in the vertical direction, and the piston 14b is slidably accepted inside. Further, the internal space of the cylinder 14a is partitioned by the piston 14b into a pressure chamber 16a on the lower side of the piston 14b and a back pressure chamber 16b on the upper side of the piston 14b. The piston 14b is slidably arranged in the cylinder 14a between the first position shown in FIG. 3 and the second position shown in FIG. As shown in FIG. 3, in the first position where the piston 14b is located on the lowermost side, the volume of the pressure chamber 16a on the lower side of the piston 14b is the smallest, and the volume of the back pressure chamber 16b on the upper side of the piston 14b becomes the smallest. It will be the largest. On the other hand, at the second position of the piston 14b shown in FIG. 4, the volume of the pressure chamber 16a on the lower side of the piston 14b is the largest, and the volume of the back pressure chamber 16b on the upper side of the piston 14b is the smallest.

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 cylinder 14a, and the inflow pipe 24a is connected to a pressure chamber in the cylinder 14a via the inflow port 25a. Communicate with 16a. That is, the water flowing out from the water supply control device 18 (FIG. 2) flows into the pressure chamber 16a in the cylinder 14a through the inflow port 25a. The water flowing into the pressure chamber 16a raises the pressure in the pressure chamber 16a, and the piston 14b is pushed up against the urging force of the spring 14c. That is, the piston 14b is moved from the first position to the second position by the pressure of tap water, and the drain valve 12 is driven accordingly.

On the other hand, an outlet 25b is provided on the upper portion of the cylinder 14a, and the outflow pipe 24b communicates with the back pressure chamber 16b in the cylinder 14a via the outlet 25b. Therefore, the water that has flowed into the back pressure chamber 16b of the cylinder 14a flows out through the outlet 25b. 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.

As shown in FIGS. 3 and 4, the rod 15 is a rod-shaped member connected to the lower surface of the piston 14b, and protrudes downward from the inside of the cylinder 14a through a sleeve 14f formed on the bottom surface of the cylinder 14a. It extends to do. The sleeve 14f is a cylindrical portion extending in the vertical direction, is provided so as to penetrate the bottom surface of the cylinder 14a, and the rod 15 extends through the inside of the sleeve 14f. 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 14d is provided between the rod 15 projecting from below the cylinder 14a and the inner wall surface of the sleeve 14f of the cylinder 14a, and a part of the water flowing into the cylinder 14a flows out from the gap 14d. .. The water flowing out from the gap 14d 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 water flows out from the gap 14d, if the water force is strong, the pressure in the pressure chamber 16a rises due to the water flowing from the inflow pipe 24a into the cylinder 14a, and the spring 14c is urged. The piston 14b is pushed up against it.

Further, as shown in FIGS. 3 and 4, a communication flow path 17 is provided at the upper end of the rod 15, and the communication flow path 17 passes through the inside of the rod 15 from the upper end of the rod 15 along the central axis. It is extending. The communication flow path 17 extends from the upper end opening 17a, which is the back pressure chamber opening provided at the upper end of the rod 15, to the side opening 17b, which is the rod opening provided at the intermediate portion of the side surface of the rod 15. In the present embodiment, the rod 15 is provided so as to penetrate the piston 14b, and the upper end opening 17a formed at the upper end of the rod 15 opens into the back pressure chamber 16b above the piston 14b. The upper end opening 17a opens in the back pressure chamber 16b upward, that is, in the sliding direction of the piston 14b.

Further, on the ceiling surface of the cylinder 14a, an outflow guide portion 14g is provided so as to hang downward. The outflow guide portion 14g is provided inside a spring 14c arranged in the cylinder 14a, and is formed in a shape in which a part of the cylinder is cut out. Further, the notch portion of the cylinder constituting the outflow guide portion 14g is directed toward the outlet 25b of the cylinder 14a. Therefore, the water that has flowed into the back pressure chamber 16b from the upper end opening 17a through the communication flow path 17 is guided toward the outflow port 25b by the outflow guide portion 14g. Further, as shown in FIG. 4, when the piston 14b is moved to the second position, the lower end of the outflow guide portion 14g and the upper surface of the piston 14b come into contact with each other. In other words, the piston 14b is positioned at the second position by abutting on the lower end of the outflow guide portion 14g.

In the present embodiment, the upper end opening 17a formed at the upper end of the rod 15 functions as a back pressure chamber opening opened in the back pressure chamber 16b, but the back pressure chamber opening is not necessarily provided in the rod 15. It does not have to be, and may be provided on the piston 14b. In this case, a part of the communication flow path 17 is formed inside the piston 14b, and the communication flow path 17 extending from the back pressure chamber opening provided on the back pressure chamber 16b side of the piston 14b is inside the rod 15. It is connected to the provided communication flow path 17.

On the other hand, the side opening 17b, which is a rod opening, is located at the lower end of the communication flow path 17 and opens on the side surface of the intermediate portion of the rod 15. Further, in the present embodiment, two side opening 17b are provided on both sides of the center line of the rod 15 at the same height. Preferably, when a plurality of side openings 17b are provided, they are provided at the same height at a position symmetrical with respect to the central axis of the rod. That is, in the present embodiment, the two side openings 17b are provided with a central angle of 180 degrees about the central axis of the rod. For example, when three side openings 17b are provided, the central angle is 120. When four degrees are provided, it is preferable to provide each side opening 17b with a central angle of 90 degrees.

Further, as shown in FIG. 3, in the state where the piston 14b is located at the first position, each side surface opening 17b provided on the rod 15 is located outside the pressure chamber 16a, that is, outside the cylinder 14a. .. That is, in the first position where the piston 14b is lowered, each side surface opening 17b provided on the side surface of the rod 15 is located below the lower end of the sleeve 14f, and each side surface opening 17b opens to the outside of the cylinder 14a. do. In this state, the back pressure chamber 16b on the upper side of the piston 14b and the outside of the cylinder 14a are communicated with each other via the communication flow path 17. In the state where the piston 14b is located at the first position, each side opening 17b of the rod 15 is located below the water stop level L ₁ shown by the alternate long and short dash line in FIG. 3, and the side opening 17b is submerged. Become a state.

On the other hand, as shown in FIG. 4, in the state where the piston 14b is located at the second position, each side surface opening 17b provided on the rod 15 is located inside the pressure chamber 16a. That is, in the second position where the piston 14b is raised, each side surface opening 17b provided on the side surface of the rod 15 is located above the upper end of the sleeve 14f, and each side surface opening 17b is a pressure chamber in the cylinder 14a. It opens inside 16a. In this state, the back pressure chamber 16b on the upper side of the piston 14b and the pressure chamber 16a on the lower side of the piston 14b are communicated with each other via the communication flow path 17.

Further, as shown in FIG. 5, the edge portion 17c of each side opening 17b on the piston 14b side is formed so as to extend linearly in a direction orthogonal to the central axis of the rod 15 (horizontal direction in FIG. 5). Has been done. Here, when the piston 14b approaches the second position and the upper edge 17c of the side opening 17b reaches above the upper end of the sleeve 14f, each side opening 17b begins to open in the pressure chamber 16a. At this time, since the edge portion 17c is formed so as to extend orthogonally to the central axis of the rod 15, the upper edge portion 17c reaches slightly above the upper end of the linearly formed sleeve 14f. Then, the area where each side opening 17b opens in the pressure chamber 16a rapidly increases. Therefore, the water in the pressure chamber 16a rapidly flows into the communication flow path 17 through each side surface opening 17b. As a result, the water pressure in the pressure chamber 16a can be rapidly reduced, so that the pressure in the pressure chamber 16a and the pressure in the back pressure chamber 16b reach equilibrium during the movement of the piston 14b, and the piston 14b does not move. Can be prevented.

Next, the clutch mechanism 22 is provided between the rod 15 and the valve shaft 12a of the drain valve 12. 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. The details of the clutch mechanism 22 will be described later.

On the other hand, as shown in FIG. 5, 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. Note that FIG. 5 is a cross-sectional view showing a state in which the drain valve 12 is held by the drain valve float mechanism 26, and the cutting direction of the cross section is rotated by 90 degrees with respect to FIGS. 3 and 4. The drain valve float mechanism 26 is configured to delay the closing of 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. Has been done. Specifically, the drain valve float mechanism 26 has a float portion 26a which is a float, 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.

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. Located in. When the lifted drain valve 12 is disengaged by the clutch mechanism 22, the engaging protrusion 12c of the descending drain valve 12 engages with the engaging portion 26b and prevents the drain valve 12 from descending (FIG. 5 shows. The engaging portion 26b and the engaging protrusion 12c are engaged with each other, and the drain valve 12 is held.) 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 12c is disengaged. When the engagement is released, the drain valve 12 descends and sits on the drain port 10a. As a result, the closing of the drain valve 12 is delayed, and an appropriate amount of washing water is discharged from the drain port 10a.

Next, the clutch mechanism 22 for connecting the drain valve 12 and the rod 15 will be described with reference to FIGS. 6 to 10.
FIG. 6 is an exploded perspective view showing the parts constituting the clutch mechanism 22 in an exploded manner. FIG. 7 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 when the drain valve 12 is closed. FIG. 8 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 at the time of disconnection. FIG. 9 is a partially enlarged cross-sectional view showing a state of the clutch mechanism 22 immediately before connection. FIG. 10 is a partially enlarged cross-sectional view showing a state when the clutch mechanism 22 is connected.

First, as shown in FIG. 6, the clutch mechanism 22 is composed of 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 drain valve 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 ends 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. 7 to 10.
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. 7. When the movable member 60 is in the engaged 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 wash water is supplied to the drain valve hydraulic drive unit 14 (FIG. 2) and the rod 15 is pulled upward from the state shown in FIG. 7, 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.

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 drain valve hydraulic drive unit 14. Then, when the drain valve 12 is pulled up to a predetermined position, as shown in FIG. 8, 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. 7 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 drain valve 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. 9, 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. 9, 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. 10, 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. 7 and returns to the state shown in FIG. 7, and the clutch mechanism 22 is engaged.

Next, the drainage / vacuum break valve device 30 connected between the water supply control device 18 and the drainage valve hydraulic drive unit 14 will be described with reference to FIGS. 11 to 13.
FIG. 11 is a perspective view of the drainage / vacuum break valve device 30. FIG. 12 is a cross-sectional view of the drainage / vacuum break valve device 30 in a state where water is not supplied from the water supply control device 18, and FIG. 13 is a cross-sectional view of the drainage / vacuum break valve device 30 in a state where water is supplied. It is a cross-sectional view.

As shown in FIGS. 12 and 13, the drainage / vacuum break valve device 30 includes a valve body case 72, a flap valve body 80 which is a valve body, and a packing 82.
As shown in FIG. 11, the valve body case 72 has 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 attached to the lower side surface of the main body portion 74. It is composed of a connecting member 78.

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. That is, the intake / drain opening 74c is formed on the vertical surface of the main body 74 that is oriented in the vertical direction, and is formed longer in the vertical direction than in the horizontal direction. Further, the upper edge 74d and the lower edge 74e of the intake / drainage opening 74c are each formed in a straight line so as to extend in the horizontal direction, and the water flowing back to the drainage / vacuum break valve device 30 exceeds the lower edge 74e. Is discharged into the water storage tank 10. The intake / drainage opening 74c may be provided on an inclined surface inclined with respect to the horizontal direction.

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. The lower end of the water pipe mounting portion 76a is open to the inside of the main body 74, and the water supplied from the water supply control device 18 passes through the inflow port 76c at the lower end of the water pipe mounting portion 76a to drain / vacuum break valve device 30. It flows in. That is, the water flowing out from the water supply control device 18 flows vertically downward from the inflow port 76c into the valve body case 72 through the water pipe mounting portion 76a provided in the upper part of the drainage / vacuum break valve device 30. do.

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 device 30 through the outflow port 78b at the upstream end of the water pipe mounting portion 78a, and flows out from the inflow pipe. It is supplied to the drain valve hydraulic drive unit 14 via the 24a. That is, the water that has flowed into the drainage / vacuum break valve device 30 is supplied to the drainage valve hydraulic drive unit 14 through the outflow port 78b. The area of the intake / drainage opening 74c is formed larger than the area of the outlet 78b, and the inlet 76c is provided above the outlet 78b.

The flap valve body 80 is a substantially L-shaped member rotatably mounted in the valve body case 72, and is configured to open and close the intake / drain opening 74c. Further, a support shaft 80a, which is a central axis extending in the horizontal direction, is formed in the vicinity of the corner portion of the L-shaped flap valve body 80. The support shaft 80a is rotatably supported by a bearing portion 76b provided on the inflow pipe connecting member 76, and the flap valve body 80 is rotated between the state shown in FIG. 12 and the state shown in FIG. .. The support shaft 80a is arranged outside the vertical projection plane of the intake / drainage opening 74c. That is, the support shaft 80a is located outside the projection surface of the intake / drainage opening 74c formed by shining light perpendicular to the surface (vertical surface) on which the intake / drainage opening 74c is formed. 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 inflow port 76c. Therefore, when water flows in through the inflow port 76c, the supply water receiving portion 80b of the flap valve body 80 is pushed downward, and the flap valve body 80 rotates from the state shown in FIG. 12 to the state shown in FIG. Will be done.

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. 13, 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. Here, since the support shaft 80a of the flap valve body 80 is arranged outside the vertical projection surface of the intake / drain opening 74c, the packing 82 is in a state where the flap valve body 80 is rotated to the state shown in FIG. It is possible to surely secure the crushing allowance.

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 outlet 78b 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. 13 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 weight mounting portion 80e so as to protrude from the intake / drainage opening 74c, and a weight 82a is attached to the tip end portion of the weight mounting portion 80e. By attaching the weight 82a, the center of gravity of the entire flap valve body 80 is located on the side closer to the intake / drainage opening 74c (right side in FIGS. 12 and 13) than the support shaft 80a. As a result, in the standby state in which the moment of the force for rotating the flap valve body 80 clockwise in FIG. 13 acts around the support shaft 80a and the static pressure and the dynamic pressure of water do not act, the flap valve body 80 is shown in FIG. It is rotated to the position shown in 12. That is, the flap valve body 80 is put into the standby posture shown in FIG. 12, in which the position of the center of gravity of the flap valve body 80 is the lowest when water is not supplied to the drainage / vacuum break valve device 30.

Further, a coil spring 84, which is an urging spring, 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. 13, 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 That is, the coil spring 84 urges the flap valve body 80 in the direction of opening the intake / drain opening 74c. On the other hand, in the state where the flap valve body 80 is rotated to the position shown in FIG. 12, 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. As described above, the coil spring 84 does not exert an urging force on the flap valve body 80 when the intake / drain opening 74c is opened by a predetermined amount or more.

In this embodiment, a cylindrical urging spring is used as the coil spring 84, and the urging spring has a substantially constant increase in urging force with respect to an increase in the amount of deformation. On the other hand, as a modification, a conical coil spring can also be used as an urging spring. The conical coil spring has a characteristic that the increase in the urging force with respect to the increase in the amount of deformation increases as the amount of deformation increases. Therefore, even when the conical coil spring is arranged so as to constantly urge the flap valve body 80, it is possible to exert an urging force having a tendency similar to that of the present embodiment. That is, by using the conical coil spring, the urging force is relatively small when the flap valve body 80 is open, and the urging force is rapidly increased as the flap valve body 80 approaches the closed position. In addition, the urging force can be applied.

Next, the operation 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.
First, in the standby state for cleaning the toilet bowl, the water level in the water storage tank 10 is at the predetermined water level L ₁ , and the solenoid valve 20 is not energized. In this state, the solenoid valve side pilot valve 50 and the float side pilot valve 44 (FIG. 2) of the water supply control device 18 are both closed, and the valve seat 40 is closed by the main valve body 38. Next, when the user presses the cleaning button of the remote control device 6 (FIG. 1), the remote control device 6 transmits an instruction signal for cleaning the toilet bowl to the controller 28 (FIG. 2). In the flush toilet device 1 of the present embodiment, 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 (FIG. 1). Also, a toilet bowl cleaning instruction signal is transmitted to the controller 28.

Upon receiving the toilet bowl cleaning instruction signal, the controller 28 energizes the solenoid valve 20 and opens the solenoid valve side pilot valve 50. 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 valve seat 40 is opened. As a result, the tap water supplied from the water supply pipe 32 to the water supply control device 18 (FIG. 2) flows out from the water supply control device 18 and flows into the drainage / vacuum break valve device 30.

When water flows into the drainage / vacuum break valve device 30, as shown in FIG. 13, the supply water receiving portion 80b of the flap valve body 80 is pushed downward, and the flap valve body 80 is rotated to the position shown in FIG. To. As a result, the intake / drainage opening 74c of the drainage / vacuum break valve device 30 is closed by the flap valve body 80. As shown by the arrow in FIG. 13, the water flowing in from the inflow port 76c of the drainage / vacuum break valve device 30 bypasses the supply water receiving portion 80b and flows into the valve body case 72, and further, the drainage receiving portion 80d. It flows into the inflow pipe 24a from the outflow port 78b by detouring.

Further, as shown in FIG. 2, the water flowing into the inflow pipe 24a flows into the cylinder 14a of the drain valve hydraulic pressure drive unit 14. The water flowing into the cylinder 14a pushes up the piston 14b against the urging force of the spring 14c. At this time, since the clutch mechanism 22 is connected (FIG. 3), the rod 15 connected to the piston 14b and the drain valve 12 connected to the rod 15 are also pulled up, and the drain valve 12 is separated from the drain port 10a. do. That is, the drain valve 12 is driven by the driving force of the drain valve hydraulic pressure drive unit 14 based on the supply pressure of tap water supplied through the water supply pipe 32, and 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 stop water level L ₁ , so that the water supply valve float 34 is lowered. As a result, the arm portion 42 (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.

On the other hand, the water flowing from the inflow pipe 24a into the pressure chamber 16a of the cylinder 14a of the drain valve hydraulic drive unit 14 pushes the piston 14b up from the position shown in FIG. 3 to the position shown in FIG. Here, when the piston 14b is located at the first position (FIG. 3), the side opening 17b provided on the rod 15 is located outside the pressure chamber 16a, so that the water in the pressure chamber 16a opens the side opening 17b. The pressure in the pressure chamber 16a can be easily increased without flowing out through the pressure chamber 16a. When the piston 14b is pushed up and the rod 15 and the drain valve 12 are pulled up to a predetermined position accordingly, the clutch mechanism 22 disconnects the drain valve 12 from the rod 15.

That is, as shown in FIG. 8, the restricting portion 70 protruding downward from the cylinder 14a rotates the movable member 60 to the “non-engaged position”, and the contact portion 68 between the pulling upper portion 15b of the rod 15 and the movable member 60. The engagement with 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 12c (FIG. 5) of the separated drain valve 12 engages with the engaging portion 26b 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.

On the other hand, when the piston 14b is pushed up from the first position shown in FIG. 3 to the second position shown in FIG. 4, the side opening 17b provided on the rod 15 moves from the outside of the cylinder 14a into the pressure chamber 16a. do. That is, as shown in FIG. 4, when the side opening 17b moves upward from the upper end of the sleeve 14f provided on the cylinder 14a, the side opening 17b opens into the pressure chamber 16a. As a result, the pressure chamber 16a and the back pressure chamber 16b in the cylinder 14a are communicated with each other through the communication flow path 17. That is, the water that has flowed into the pressure chamber 16a flows into the communication flow path 17 from the side opening 17b, and flows into the back pressure chamber 16b through the upper end opening 17a.

Further, at this time, when the upper edge portion 17c of the side opening 17b oriented in the horizontal direction moves upward from the upper end of the sleeve 14f, the opening area of the side opening 17b into the pressure chamber 16a sharply increases. , The water in the pressure chamber 16a rapidly flows into the back pressure chamber 16b. The water flowing into the back pressure chamber 16b flows out from the cylinder 14a through the outflow pipe 24b. At this time, the outflow guide portion 14g provided on the ceiling surface of the cylinder 14a guides the water flowing out from the upper end opening 17a toward the outflow pipe 24b. The water flowing out through the outflow pipe 24b is branched at the outflow pipe branch portion 24c (FIG. 2) and flows into the water storage tank 10 and the overflow pipe 10b, respectively. Further, a part of the water flowing from the inflow pipe 24a into the cylinder 14a flows out from the gap 14d between the inner wall of the sleeve 14f of the cylinder 14a and the rod 15, and this water flows into the water storage tank 10.

Next, when the water level in the water storage tank 10 drops to a second predetermined water level lower than the water stop water level L ₁ , the float portion 26a (FIG. 5) 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 12c 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 drain valve hydraulic drive unit 14. Since the water flowing out from the drain valve hydraulic drive unit 14 flows into the water storage tank 10 through the outflow pipe 24b, the water level in the water storage tank 10 rises.

When the water level in the water storage tank 10 rises to the predetermined water level L ₁ , the water supply valve float 34 (FIG. 2) rises, the float side pilot valve 44 is moved via the arm portion 42, and the float side pilot valve 44 is closed. Will be done. 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 is stopped. When the water supply from the water supply control device 18 is stopped, the piston 14b of the drain valve hydraulic drive unit 14 is pushed down by the urging force of the spring 14c, and the rod 15 is also pushed down accordingly.

Further, when the rod 15 is pushed down together with the piston 14b (FIG. 9), the rod 15 and the drain valve 12 separated by the clutch mechanism 22 are reconnected. That is, as shown in FIG. 10, the contacted portion 15d of the descending rod 15 comes into contact with the movable member 60, and the movable member 60 is rotated to the “engagement position” with the pulling upper portion 15b of the rod 15. The contact portion 68 of the movable member 60 is engaged (FIG. 7). Therefore, the next time the toilet bowl cleaning is executed, the rod 15 and the drain valve 12 are both pulled up by the piston 14b. As a result, one toilet bowl cleaning is completed, and the flush toilet device 1 returns to the standby state for toilet bowl cleaning.

Next, the operation of the drainage / vacuum break valve device 30 after the water supply from the water supply control device 18 is stopped will be described.
When the water supply from the water supply control device 18 is stopped, the dynamic pressure due to the water supply does not act on the water supply receiving portion 80b (FIG. 13) of the flap valve body 80 provided in the drainage / vacuum break valve device 30. As a result, the flap valve body 80 is rotated from the state shown in FIG. 13 to the state shown in FIG. 12 by the urging force of the coil spring 84, and the intake / drain opening 74c is opened. On the other hand, when the water supply from the water supply control device 18 is stopped, the piston 14b (FIG. 4) of the drain valve hydraulic drive unit 14 that has been pushed up to the second position is pushed down by the urging force of the spring 14c. As a result, most of the water filled in the pressure chamber 16a of the cylinder 14a flows back toward the drainage / vacuum break valve device 30 through the inflow pipe 24a.

The water flowing back from the inflow pipe 24a to the drainage / vacuum break valve device 30 flows into the valve body case 72 through the outflow port 78b of the water pipe mounting portion 78a as shown by the solid arrow in FIG. It flows out beyond the lower edge 74e of the drainage opening 74c. The water flowing out from the intake / drainage opening 74c of the drainage / vacuum break valve device 30 is discharged into the water storage tank 10. Here, since the lower edge 74e of the intake / drainage opening 74c is formed linearly in the horizontal direction, comparison for discharging the backflow water when the intake / drainage opening 74c is opened even a little. A large flow path is secured. In this way, since the water flowing back from the drain valve hydraulic drive unit 14 can be quickly discharged, the water remaining in the cylinder 14a is discharged at an early stage, and the washing water tank device 4 is quickly returned to the initial state. be able to.

Further, since the outflow port 78b is provided below the inflow port 76c, it is possible to prevent the water flowing back into the drainage / vacuum break valve device 30 through the outflow port 78b from flowing back to the inflow port 76c. can do. Further, since the area of the intake / drainage opening 74c is formed to be larger than the area of the outlet 78b, the intake / drainage opening 74c is not filled with water flowing back through the outlet 78b, and the backflow does not occur. The drained water is discharged promptly. In addition, since the orifice 24d (FIG. 2) which is a flow rate suppressing means is provided in the flow path between the drainage / vacuum break valve device 30 and the drain valve hydraulic pressure drive unit 14, the drainage / vacuum break valve device 30 is provided. It is possible to prevent a large flow rate of water from flowing back, and it is possible to reliably prevent the intake / drainage opening 74c from being filled with water. With these configurations, it is possible to reliably prevent the water flowing back into the drainage / vacuum break valve device 30 through the outflow port 78b from flowing back to the water supply control device 18 on the upstream side. In the present embodiment, the orifice 24d is provided as the flow rate suppressing means, but the flow rate of the backflowing water can be suppressed by another configuration.

On the other hand, when the intake / drain opening 74c of the drain / vacuum break valve device 30 is opened, outside air passes through the upper part of the intake / drain opening 74c and enters the valve body case 72 as shown by the arrow of the broken line in FIG. Inhaled into. That is, since the intake / drainage opening 74c is formed vertically, the water flowing back through the outlet 78b is discharged from the lower part of the intake / drainage opening 74c, and at the same time, the outside air is discharged from the upper part of the intake / drainage opening 74c. It can be easily introduced. In this way, even when the water supply from the water supply control device 18 is stopped and the side of the water pipe mounting portion 76a becomes negative pressure, the outside air is sucked from the drainage / vacuum break valve device 30, so that the backflow flows from the inflow pipe 24a. The backflow of the drained water to the water supply control device 18 is prevented. Here, since the upper edge 74d of the intake / drainage opening 74c is formed linearly in the horizontal direction, if the intake / drainage opening 74c is opened even a little, it is relatively large for sucking the outside air. A flow path is secured.

Further, as shown in FIG. 12, since the inflow port 76c provided at the lower end of the water pipe mounting portion 76a is located below the upper edge 74d of the intake / drainage opening 74c, the water in the valve body case 72 can be collected. , The backflow does not flow into the water pipe mounting portion 76a, and the backflow can be reliably prevented. In this way, the flap valve body 80 of the drainage / vacuum break valve device 30 opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, and at the same time, the water flows back from the drain valve hydraulic drive unit 14. Operates to drain. The drainage / vacuum break valve device 30 has both a function of discharging water flowing back from the downstream side and a function of sucking outside air into the pipeline, and the intake / drainage opening 74c is an intake port for outside air and the inside of the pipeline. Functions as a drainage outlet for water.

Next, with reference to FIG. 14, the force acting to open and close the flap valve body 80 will be described.
FIG. 14 is a diagram for explaining the force acting on the flap valve body 80 of the drainage / vacuum break valve device 30 in each operating state.

First, in the state before the water supply from the water supply control device 18 shown in FIG. 14A is started, the flap valve body 80 of the drainage / vacuum break valve device 30 is in the standby posture. In this state, the force acting on the flap valve body 80 is only gravity, and the flap valve body 80 is rotated to the state of the standby posture in which the center of gravity is lowered most (the state of FIG. 12), and the intake / drain opening is opened. 74c is open. In the state where the flap valve body 80 is in the standby posture, the coil spring 84 (FIG. 12) is not in contact with the flap valve body 80, and the urging force by the coil spring 84 does not act on the flap valve body 80.

Next, as shown in FIG. 14B, when the water supply from the water supply control device 18 is started, the water supply receiving portion 80b of the flap valve body 80 is pushed by the dynamic pressure of the water flowing in from the inflow port 76c. , The moment T1 of the force based on the dynamic pressure acts on the flap valve body 80. As a result, the flap valve body 80 is rotated in the direction of closing the intake / drain opening 74c by the moment T1 of this force. That is, the moment T1 of the force based on the dynamic pressure of the inflowing water overcomes the moment Tg of the force based on the gravity trying to maintain the flap valve body 80 in the standby posture (T1-Tg> 0), and the flap valve body 80 Is rotated. Further, when the flap valve body 80 is rotated in the closing direction by a predetermined amount or more, the coil spring 84 (FIG. 12) comes into contact with the flap valve body 80, and the moment Tb of the force based on the urging force of the coil spring 84 also becomes the flap valve. It will act on the body 80. The flap valve body 80 overcomes the urging force of the coil spring 84 (T1-Tg-Tb> 0) and is rotated in the closing direction.

Further, when the flap valve body 80 is rotated and the intake / drain opening 74c is close to the closed state, as shown in FIG. 14 (c), the force based on the static pressure of the water in the drain / vacuum break valve device 30 is applied. The flap valve body 80 is also pressed in the closing direction by the moment Ts.

Next, as shown in FIG. 14 (d), in a state where the intake / drainage opening 74c is closed by the flap valve body 80 and the water supply from the water supply control device 18 is continued, the flap valve body is subjected to static pressure and dynamic pressure. 80 is blocked. That is, the intake / drainage opening 74c is generated by the moment T1 of the force based on the dynamic pressure of the water supply acting on the supply water receiving portion 80b of the flap valve body 80 and the moment Ts of the force based on the static pressure acting on the back surface of the flap valve body 80. The closed state is stably maintained (T1 + Ts-Tg-Tb> 0).

Further, as shown in FIG. 14 (e), when the water supply from the water supply control device 18 is stopped, the moment T1 of the force based on the dynamic pressure of the water supply does not act on the flap valve body 80. In this state, the sum of the moments of force (Tg, Tb) in the direction of opening the flap valve body 80 becomes larger than the moment of force (Ts) in the direction of closing (Ts-Tg-Tb <0). As a result, the flap valve body 80 starts to rotate in the opening direction. Here, since the force based on the static pressure acting on the flap valve body 80 is proportional to the opening area of the intake / drainage opening 74c, if the opening area is set excessively, the moment Ts of the force based on the static pressure becomes excessive. , It becomes difficult to open the flap valve body 80.

Next, as shown in FIG. 14 (f), when the flap valve body 80 is opened, air is introduced into the drainage / vacuum break valve device 30 from the intake / drainage opening 74c, and the drainage / vacuum break valve device is introduced. The water in 30 is discharged through the intake / drain opening 74c. By introducing the atmosphere into the drainage / vacuum break valve device 30, the moment Ts of the force based on the static pressure does not act on the flap valve body 80 (Ts = 0). Further, when the flap valve body 80 is rotated in the opening direction by a predetermined amount or more, the tip of the coil spring 84 (FIG. 12) separates from the flap valve body 80, and the moment Tb of the force based on the urging force of the coil spring 84 also acts. No longer (Tb = 0). Even in this state, the open state of the flap valve body 80 is maintained (-Tg <0).

Further, as shown in FIG. 14 (g), when water starts to flow back through the outlet 78b from the side of the drain valve hydraulic pressure drive unit 14, the force based on the dynamic pressure of the water flowing back through the outlet 78b is applied. The flap valve body 80 is rotated in the opening direction by the moment T2 (-Tg-T2 <0).

Then, as shown in FIG. 14 (h), when the discharge of the water flowing back through the outlet 78b is completed, the flap valve body 80 is opened only by the moment Tg of the force based on the gravity acting on the flap valve body 80. It is maintained at the above and returns to the state before the water supply from the water supply control device 18 is started. In the drainage / vacuum break valve device 30 of the present embodiment, the moments T1, T2, Tg, Tb, and Ts of the force acting on the flap valve body 80 are appropriately set, so that the moments T1, T2, Tg, Tb, and Ts are appropriately set to be shown in FIGS. 14 (a) to 14 (h). Make sure that the operation is performed.

As described above, the drainage / vacuum breaker valve device 30 provided in the wash water tank device 4 of the present embodiment discharges backflow water and introduces the atmosphere into the pipeline, so that the negative pressure breaker valve ( It also functions as a vacuum breaker), but it is different from the normal negative pressure breaker valve provided in conventional wash water tank devices and the like. This will be described below with reference to FIG. 24.

FIG. 24 is a cross-sectional view showing a typical configuration of the negative pressure breaking valve, and shows the configuration of the negative pressure breaking valve disclosed in Japanese Patent Application Laid-Open No. 2013-204389 as an example.
As shown in FIG. 24, the normal negative pressure breaking valve 90 is composed of a negative pressure breaking valve body 92 and an atmospheric opening 94 opened and closed by the negative pressure breaking valve body 92. In the example shown in FIG. 24, the negative pressure breaking valve 90 is provided in the middle of the flow path from the main valve port 96a to the outlet 98. The wash water that flows in from the main valve port 96a and flows out from the outflow port 98 is used to supply the water to the water storage tank or to refill the toilet bowl body via a hose for make-up water and an overflow pipe. Can be done. The negative pressure fracture valve body 92 is a valve body arranged so as to be movable in the vertical direction, and is configured to close the atmosphere opening 94 when moved upward. On the other hand, the atmospheric opening 94 is an opening formed on a wall surface facing in the horizontal direction, and opens vertically upward. In the example shown in FIG. 24, the upper side of the atmospheric opening 94 is open to the atmosphere.

As shown in FIG. 24, when the main valve body 96b is opened, water flows in from the main valve port 96a, and the inflowing water flows along the flow path and heads upward. The negative pressure breaking valve body 92 is pushed upward by the dynamic pressure of the water flowing upward, and closes the atmospheric opening 94. When the air opening 94 is closed, the water flowing in from the main valve port 96a flows out to the outflow port 98. On the other hand, when the inflow of water from the main valve port 96a is stopped, the dynamic pressure does not act on the negative pressure breaking valve body 92, so that the negative pressure breaking valve body 92 is moved downward by gravity and the atmosphere opening 94 is opened. Open to the atmosphere. Therefore, when a negative pressure is generated on the upstream side of the main valve port 96a, the atmosphere is introduced into the flow path from the atmosphere opening 94, and the negative pressure is destroyed. Therefore, the negative pressure generated on the upstream side of the main valve port 96a sucks the water on the downstream side of the negative pressure breaking valve 90 to the upstream side, and it is possible to prevent the water from flowing back to the upstream side.

However, in the normal negative pressure breaking valve 90 having the structure shown in FIG. 24, it is not possible to discharge the water flowing back from the downstream side at the same time as the introduction of the atmosphere into the pipeline. That is, in the structure shown in FIG. 24, in order to discharge the backflow water from the atmosphere opening 94, the water level of the water flowing back to the outlet 98 from the water storage tank or the like needs to rise above the atmosphere opening 94. .. In this state, the atmospheric opening 94 is filled with water, so that the atmosphere can no longer be introduced from the atmospheric opening 94. As described above, in the normal negative pressure breaking valve, the introduction of the atmosphere and the discharge of the backflow water cannot be performed at the same time, and this cannot be made to act like the drainage / vacuum breaking valve device 30 in the present embodiment. ..

According to the washing water tank device 4 of the first embodiment of the present invention, when the supply of water from the upstream side is stopped, the drainage / vacuum break valve device 30 drains the water flowing back from the drain valve hydraulic drive unit 14. (FIG. 12), the water that has flowed into the cylinder 14a (FIG. 2) of the drain valve hydraulic drive unit 14 can be discharged by a simple mechanism. As a result, the piston 14b can be returned to the initial position at an early stage, and can be returned to a state in which the next toilet bowl cleaning can be performed in a short time. Further, according to the washing water tank device 4 of the present embodiment, the drainage / vacuum break valve device 30 opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, so that the drainage / vacuum break When the upstream side of the valve device 30 becomes a negative pressure, the air is sucked in and water can be prevented from flowing back to the upstream side.

Further, according to the washing water tank device 4 of the present embodiment, since the inflow port 76c is provided above the outflow port 78b (FIG. 12), the water flowing back from the drain valve hydraulic pressure drive unit 14 to the outflow port 78b. However, it is possible to reliably prevent backflow to the inflow port 96c. Further, since the intake / drain opening 74c opened and closed by the flap valve body 80 is formed on the vertical surface, the water flowing back from the drain valve hydraulic drive unit 14 to the outlet 78b is discharged from the lower part of the intake / drain opening 74c. At the same time, the air can be sucked from the upper part of the intake / drain opening 74c, and the drain and the intake can be performed at the same time.

Further, according to the washing water tank device 4 of the present embodiment, since the area of the intake / drainage opening 74c is larger than the area of the outlet 78b of the drainage / vacuum break valve device 30, the outlet from the drain valve hydraulic pressure drive unit 14 While draining the water flowing back to 78b, it is possible to reliably perform inhalation of the atmosphere.

Further, according to the washing water tank device 4 of the present embodiment, the intake / drainage opening 74c is formed longer in the vertical direction than in the horizontal direction (FIG. 11). , Can reliably perform air inhalation.

Further, according to the washing water tank device 4 of the present embodiment, the flap valve body 80 of the drainage / vacuum break valve device 30 opens and closes the intake / drainage opening 74c by being rotated, so that the intake / drainage opening 74c is opened and closed. The opening / closing mechanism can be compactly configured, and the degree of freedom in designing the drainage / vacuum break valve device 30 can be expanded.

Further, according to the washing water tank device 4 of the present embodiment, the support shaft 80a around which the flap valve body 80 is rotated is arranged outside the vertical projection surface of the intake / drainage opening 74c (FIG. 12). The crushing allowance of the packing 82 that seals between the edge of the intake / drain opening 74c and the flap valve body 80 can be surely secured, and the intake / drain opening 74c can be surely closed.

Further, according to the washing water tank device 4 of the present embodiment, the lower edge 74e of the intake / drainage opening 74c extends in the horizontal direction (FIG. 11), and the backflowing water exceeds the lower edge 74e and is a water storage tank. Since the water is discharged into the drainage 10, it is possible to secure a large flow path area of the drainage flowing beyond the lower edge 74e, and it is possible to suppress an increase in the water level in the drainage / vacuum break valve device 30.

Further, according to the washing water tank device 4 of the present embodiment, since the upper edge 74d of the intake / drainage opening 74c extends in the horizontal direction (FIG. 11), water is discharged from the intake / drainage opening 74c. Also, a large flow path area for sucking outside air can be secured through the intake / drainage opening 74c, and the air can be reliably sucked.

Further, according to the washing water tank device 4 of the present embodiment, the flap valve body 80 is in a standby posture in which the position of the center of gravity is lowered most in a state where water is not supplied to the drainage / vacuum break valve device 30 (FIG. 12). Therefore, with a simple structure, the valve body can be returned to the standby position by its own weight.

Further, according to the washing water tank device 4 of the present embodiment, since the flap valve body 80 includes the weight 82a, the gravity acting on the flap valve body 80 can be increased, and the flap valve body 80 has a simple structure. Can be reliably returned to the standby posture.

Further, according to the washing water tank device 4 of the present embodiment, since the flap valve body 80 is provided with a coil spring 84 that urges the flap valve body 80 in the direction of opening the intake / drain opening 74c (FIG. 13), the drain / vacuum is provided. When the supply of water to the break valve device 30 is stopped, the intake / drain opening 74c can be reliably opened.

Further, according to the washing water tank device 4 of the present embodiment, when the intake / drainage opening 74c is opened by a predetermined amount or more, the urging force does not act on the flap valve body 80 (FIG. 12), so that the drainage / vacuum breakage occurs. When the water supply to the valve device 30 is started, the flap valve body 80 can be easily moved and closed. On the other hand, when the opening degree of the intake / drainage opening 74c is less than a predetermined amount, a urging force acts on the flap valve body 80 (FIG. 13), so that the supply of water to the drainage / vacuum break valve device is stopped. When, the valve body can be easily opened

Further, according to the washing water tank device 4 of the present embodiment, the orifice 24d (FIG. 2), which is a flow rate suppressing means, suppresses the flow rate of water flowing back to the drainage / vacuum break valve device 30, so that the drainage valve water pressure. It is possible to prevent a large flow rate of water from flowing back from the drive unit 14, filling the intake / drainage opening 74c with water, and preventing the outside air from being sucked.

Next, with reference to FIGS. 15 to 17, a flush water tank device according to the second embodiment of the present invention and a flush toilet device including the same will be described.
The washing water tank device of the present embodiment has a structure of the drainage / vacuum break valve device different from that of the first embodiment described above, and other configurations are the same as those of the first embodiment. Therefore, here, only the points different from the first embodiment of the second embodiment of the present invention will be described, and the description of the same configuration, operation, and effect will be omitted.

FIG. 15 is a perspective view of a drainage / vacuum break valve device provided in the washing water tank device according to the second embodiment of the present invention. FIG. 16 is a cross-sectional view of the drainage / vacuum break valve device in a state where water is not supplied from the water supply control device, and FIG. 17 is a cross-sectional view of the drainage / vacuum break valve device in a state where water is supplied. be.

As shown in FIGS. 15 to 17, the drainage / vacuum break valve device 130 in the present embodiment includes a valve body case 172, a flap valve body 180 which is a valve body, and a packing 182.
Further, the valve body case 172 is attached to the box-shaped main body portion 174, the lid member 176 attached to the upper surface of the main body portion 174, the inflow pipe connecting member 177 (FIG. 16), and the lower side surface of the main body portion 174. It is composed of the outflow pipe connecting member 178.

The main body portion 174 of the valve body case 172 is configured to have a substantially trapezoidal box shape that expands downward, and one side surface thereof is oriented vertically and the other side surface is inclined. Further, the upper surface of the main body portion 174 is opened, and the lid member 176 is attached so as to close the opening. Further, an upper mounting portion 174a is provided on the upper portion of the vertically oriented side surface of the main body portion 174, and the inflow pipe connecting member 177 is mounted therein. Further, a lower mounting portion 174b is provided at the lower portion of the inclined side surface of the main body portion 174, and the outflow pipe connecting member 178 is mounted there. Further, on the inclined side surface of the main body portion 174, an intake / drainage opening 174c is provided on the upper side of the lower mounting portion 174b.

The intake / drain opening 174c is a vertically long rectangular opening. When the flap valve body 180 is opened, the outside air is sucked through the intake / drain opening 174c, and the water flowing back from the inflow pipe 24a flows out and is discharged into the water storage tank 10. That is, the intake / drainage opening 174c is an opening formed on the inclined side surface of the main body portion 174, and is formed longer in the vertical direction than in the horizontal direction. Further, the upper edge 174d of the intake / drainage opening 174c is formed linearly so as to extend in the horizontal direction, and the lower edge 174e extends in an arc shape. The water flowing back to the drainage / vacuum break valve device 130 is discharged beyond the lower edge 174e into the water storage tank 10.

The inflow pipe connecting member 177 is provided with a water pipe mounting portion 177a extending in the horizontal direction so as to penetrate the main body portion 174. One end of the water pipe mounting portion 177a protrudes toward the outside of the main body portion 174 in the opposite direction of the intake / drainage opening 174c, and the water pipe extending from the water supply control device 18 (FIG. 2) is connected to the one end. .. On the other hand, the other end of the water pipe mounting portion 177a is open to the inside of the main body portion 174, and the water supplied from the water supply control device 18 is drained through the inflow port 177b at the other end of the water pipe mounting portion 177a. It flows into the vacuum break valve device 130. The inflow port 177b is open toward the back surface of the flap valve body 180 arranged in the drainage / vacuum break valve device 130. That is, the water flowing out from the water supply control device 18 flows horizontally into the valve body case 172 from the inflow port 177b through the water pipe mounting portion 177a provided on the upper side surface of the drainage / vacuum break valve device 130. ..

The outflow pipe connecting member 178 is provided with a water pipe mounting portion 178a so as to project in the horizontal direction, and the inflow pipe 24a is connected to the water pipe mounting portion 178a. Therefore, the water supplied from the water supply control device 18 and flowing into the valve body case 172 flows out from the drainage / vacuum break valve device 130 through the outflow port 178b at the upstream end of the water pipe mounting portion 178a, and flows out from the inflow pipe. It is supplied to the drain valve hydraulic drive unit 14 via the 24a. That is, the water that has flowed into the drainage / vacuum break valve device 130 is supplied to the drainage valve hydraulic drive unit 14 through the outflow port 178b. The area of the intake / drainage opening 174c is formed larger than the area of the outlet 178b, and the inlet 177b is provided above the outlet 178b.

The flap valve body 180 is a substantially rectangular plate-shaped member rotatably mounted in the valve body case 172, and is configured to open and close the intake / drain opening 174c. Further, a support shaft 180a, which is a central axis extending in the horizontal direction, is formed at the upper end of the flap valve body 180. The support shaft 180a is rotatably supported by a bearing portion 176a provided on the lid member 176, and the flap valve body 180 is rotated between the state shown in FIG. 16 and the state shown in FIG. The support shaft 180a is arranged outside the vertical projection plane of the intake / drainage opening 174c. That is, the support shaft 180a is located outside the projection surface of the intake / drainage opening 174c formed by shining light perpendicular to the surface (inclined surface) on which the intake / drainage opening 174c is formed. There is.

Further, as described above, the water pipe mounting portion 177a is arranged on the upper back side of the flap valve body 180, and the water supplied from the water supply control device 18 is the back surface of the flap valve body 180 from the inflow port 177b. Is discharged toward. Therefore, when water flows in through the inflow port 177b, the back surface of the flap valve body 180 is pushed toward the intake / drain opening 174c, and the flap valve body 180 changes from the state shown in FIG. 16 to the state shown in FIG. It is rotated.

Further, the flap valve body 180 has a valve plate portion 180b extending downward from the support shaft 180a and a drainage receiving portion 180c provided below the valve plate portion 180b. The valve plate portion 180b is arranged so as to face the intake / drain opening 174c provided on the inclined side surface of the main body portion 174, and when the flap valve body 180 is rotated to the state shown in FIG. 17, the intake / drain It is configured to cover the opening 174c. Further, a thin plate-shaped packing 182 is attached to the surface of the valve plate portion 180b on the side facing the intake / drainage opening 174c, and when the flap valve body 180 is rotated to the state shown in FIG. The space between the valve plate portion 180b and the intake / drainage opening 174c is sealed. Here, since the support shaft 180a of the flap valve body 180 is arranged outside the vertical projection surface of the intake / drain opening 174c, the packing 182 is in a state where the flap valve body 180 is rotated to the state shown in FIG. It is possible to surely secure the crushing allowance.

The drainage receiving portion 180c is formed on the lower side of the valve plate portion 180b, and is arranged so as to face the outflow port 178b of the outflow pipe connecting member 178. Therefore, when water flows back from the inflow pipe 24a to the water pipe mounting portion 178a, the drainage receiving portion 180c is pushed and the flap valve body 180 is rotated from the state shown in FIG. 17 to the state shown in FIG. To. The water flowing back from the water pipe mounting portion 178a flows out through the intake / drainage opening 174c and is discharged into the water storage tank 10.

Further, the valve plate portion 180b is provided with a weight mounting portion 180d so as to protrude from the intake / drainage opening 174c, and a weight 182a is attached to the tip end portion of the weight mounting portion 180d. By attaching this weight 182a, the center of gravity of the entire flap valve body 180 is located closer to the intake / drainage opening 174c than the support shaft 180a (right side in FIGS. 16 and 17). As a result, in the standby state in which the moment of the force for rotating the flap valve body 180 clockwise in FIG. 17 acts around the support shaft 180a and the static pressure and the dynamic pressure of water do not act, the flap valve body 180 is shown in FIG. It is rotated to the position shown in 16. That is, the flap valve body 180 is placed in the standby posture shown in FIG. 16 in which the position of the center of gravity of the flap valve body 180 is most lowered when water is not supplied to the drainage / vacuum break valve device 130.

As a modification, a cover can be attached to the outer peripheral surface of the main body portion 174 so as to cover the intake / drainage opening 174c. With this cover, it is possible to prevent the water discharged from the intake / drain opening 174c into the water storage tank 10 from scattering. Further, when the discharged water collides with the surface of the cover facing the intake / drain opening 174c, the water temporarily stays in the vicinity of the flap valve body 180, and the flap valve body 180 can be more easily rotated in the opening direction. Can be done.

Further, as another modification, a space may be further formed below the outlet 178b in the main body portion 174, and the flap valve body 180 may be extended in this space. That is, a tip portion extending downward from the lower end of the drainage receiving portion 180c may be formed. According to this other modification, when water flows back from the inflow pipe 24a to the water pipe mounting portion 178a, the backflow water can be guided to the drainage receiving portion 180c by the portion forming the lower edge 174e. Further, when water flows in through the inflow port 177b, the portion forming the lower edge 174e suppresses the discharge of water from the intake / drainage opening 174c to increase the internal pressure and form the lower edge 174e. Since there is no portion protruding into the main body portion 174 at the lower position facing the portion, water can smoothly flow out from the outlet 178b. Further, a urging spring and a spring cover for covering the urging spring may be provided at the tip portion between the urging spring and the inner wall of the main body portion 174.

Next, the operation of the flush water tank device and the flush toilet device according to the second embodiment of the present invention will be described.
First, when the instruction signal for cleaning the toilet bowl is received, water is supplied from the water supply control device 18, and water flows into the drainage / vacuum break valve device 130. When water flows into the drainage / vacuum break valve device 130, as shown in FIG. 16, the back surface of the flap valve body 180 is pushed toward the intake / drainage opening 174c, and the flap valve body 180 is rotated to the position shown in FIG. Be moved. As a result, the intake / drain opening 174c of the drain / vacuum break valve device 130 is closed by the flap valve body 180. The water flowing in from the inflow port 177b of the drainage / vacuum break valve device 130 flows into the valve body case 172 as shown by an arrow in FIG. 17, and further flows in from the outflow port 178b by bypassing the drainage receiving portion 180c. It flows into the pipe 24a.

As a result, wash water is supplied to the drain valve hydraulic drive unit 14. Since the toilet bowl cleaning action by the cleaning water tank device after the cleaning water is supplied to the drain valve hydraulic drive unit 14 is the same as that of the first embodiment described above, the description thereof will be omitted.

Next, when the water supply from the water supply control device 18 is stopped after the toilet bowl cleaning is completed, water is supplied to the back surface of the valve plate portion 180b (FIG. 17) of the flap valve body 180 provided in the drainage / vacuum break valve device 130. Dynamic pressure does not work. As a result, due to the gravity acting on the flap valve body 180, the flap valve body 180 is rotated from the state shown in FIG. 17 to the state shown in FIG. 16, and the intake / drain opening 174c is opened. On the other hand, when the water supply from the water supply control device 18 is stopped, the piston 14b (FIG. 4) of the drain valve hydraulic drive unit 14 that has been pushed up to the second position is pushed down by the urging force of the spring 14c. As a result, most of the water filled in the pressure chamber 16a of the cylinder 14a flows back toward the drainage / vacuum break valve device 130 through the inflow pipe 24a.

The water flowing back from the inflow pipe 24a to the drainage / vacuum break valve device 130 flows into the valve body case 172 through the outflow port 178b of the water pipe mounting portion 178a as shown by the solid arrow in FIG. It flows out beyond the lower edge 174e of the drainage opening 174c. The water flowing out from the intake / drainage opening 174c of the drainage / vacuum break valve device 130 is discharged into the water storage tank 10. Further, since the outflow port 178b is provided below the inflow port 177b, it is possible to prevent the water flowing back into the drainage / vacuum break valve device 130 through the outflow port 178b from flowing back to the inflow port 177b. can do.

Further, since the area of the intake / drainage opening 174c is formed larger than the area of the outlet 178b, the intake / drainage opening 174c is not filled with water flowing back through the outlet 178b, and the backflow does not occur. The drained water is discharged promptly. With this configuration, it is possible to reliably prevent the water flowing back into the drainage / vacuum break valve device 130 through the outflow port 178b from flowing back to the water supply control device 18 on the upstream side. Further, since the water flowing back from the drain valve hydraulic drive unit 14 can be quickly discharged, the water remaining in the cylinder 14a can be discharged at an early stage, and the washing water tank device can be quickly returned to the initial state. ..

On the other hand, when the intake / drain opening 174c of the drain / vacuum break valve device 130 is opened, the outside air passes through the upper part of the intake / drain opening 174c and enters the valve body case 172 as shown by the arrow of the broken line in FIG. Inhaled into. That is, since the intake / drainage opening 174c is formed vertically, the water flowing back through the outlet 178b is discharged from the lower part of the intake / drainage opening 174c, and at the same time, the outside air is discharged from the upper part of the intake / drainage opening 174c. It can be easily introduced. In this way, even when the water supply from the water supply control device 18 is stopped and the side of the water pipe mounting portion 177a becomes negative pressure, the outside air is sucked from the drainage / vacuum break valve device 130, so that the backflow flows from the inflow pipe 24a. The backflow of the drained water to the water supply control device 18 is prevented. Here, since the upper edge 174d of the intake / drainage opening 174c is formed linearly in the horizontal direction, if the intake / drainage opening 174c is opened even a little, it is relatively large for sucking outside air. A flow path is secured.

Further, as shown in FIG. 16, since the inflow port 177b is located below the upper edge 174d of the intake / drainage opening 174c, the water in the valve body case 172 flows back into the water pipe mounting portion 177a. There is no such thing, and backflow can be reliably prevented. In this way, the flap valve body 180 of the drainage / vacuum break valve device 130 opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, and at the same time, the water flows back from the drain valve hydraulic drive unit 14. Operates to drain. The drainage / vacuum break valve device 130 has both a function of discharging the water flowing back from the downstream side and a function of sucking the outside air into the pipeline, and the intake / drainage opening 174c is the intake port of the outside air and the inside of the pipeline. Functions as a drainage outlet for water.

According to the washing water tank device of the second embodiment of the present invention, since the intake / drain opening 174c is provided on the inclined surface (FIG. 16), the flap valve body 180 is easily returned to the standby position by its own weight. be able to.

Next, with reference to FIGS. 18 to 21, a flush water tank device according to a third embodiment of the present invention and a flush toilet device including the same will be described.
The washing water tank device of the present embodiment has a structure of the drainage / vacuum break valve device different from that of the first embodiment described above, and other configurations are the same as those of the first embodiment. Therefore, here, only the points different from the first embodiment of the third embodiment of the present invention will be described, and the description of the same configuration, operation, and effect will be omitted.

FIG. 18 is a perspective view of a drainage / vacuum break valve device provided in the washing water tank device according to the third embodiment of the present invention. FIG. 19 is a perspective view of the drainage / vacuum break valve device shown by breaking a part of the case, and shows a state in which water is not supplied from the water supply control device. FIG. 20 is a perspective view of the drainage / vacuum break valve device shown by breaking a part of the case, and shows a state in which water is supplied from the water supply control device. FIG. 21 is a horizontal sectional view showing the internal structure of the drainage / vacuum break valve device.

As shown in FIGS. 18 to 21, the drainage / vacuum break valve device 230 in the present embodiment has a valve body case 272, a flap valve body 280 which is a valve body, and a packing 282.
Further, the valve body case 272 is composed of a cylindrical main body portion 274 and a lid member 276 attached to the upper surface of the main body portion 274.

The main body 274 of the valve body case 272 is formed in a substantially cylindrical shape with the central axis directed in the vertical direction. Further, the upper surface of the main body portion 274 is opened, and the lid member 276 is attached so as to close the opening. Further, an inflow side water pipe mounting portion 274a is provided on the upper portion of the outer peripheral surface of the main body portion 274, and an outflow side water pipe mounting portion 274b is provided on the lower portion of the outer peripheral surface. Further, an intake / drainage opening 274c is also provided on the outer peripheral surface of the main body portion 274.

Further, a cover 278 (FIG. 21) is attached to the outer peripheral surface of the main body portion 274. The cover 278 is attached so as to cover the intake / drainage opening 274c provided on the side surface of the main body portion 274. The water flowing out from the intake / drainage opening 274c flows out of the drainage / vacuum break valve device 230 through the gap between the cover 278 and the outer peripheral surface of the main body 274.

The inflow side water pipe mounting portion 274a is a circular pipe formed so as to project horizontally from the upper side surface of the main body portion 274 in a direction forming a right angle to the central axis of the main body portion 274. Further, the outflow side water pipe mounting portion 274b is a circular pipe formed so as to project horizontally from the lower side surface of the main body portion 274 in a direction forming a right angle to the central axis of the main body portion 274. Further, the base end of the inflow side water pipe mounting portion 274a opens inside the main body portion 274 as an inflow port 274d (FIG. 21) through which the supplied water flows, and the base end of the outflow side water pipe mounting portion 274b is formed. The drainage / vacuum break valve device 230 is opened inside the main body 274 as an outflow port 274e for draining water.

The inflow port 274d at the base end of the inflow side water pipe mounting portion 274a is provided above the outflow port 274e at the base end of the outflow side water pipe mounting portion 274b. Further, the outlet 274e is provided below the lower end of the intake / drainage opening 274c formed on the side surface of the main body portion 274. Further, a water pipe extending from the water supply control device 18 (FIG. 2) is connected to the inflow side water pipe attachment portion 274a, and the water supplied from the water supply control device 18 passes through the inflow port 274d and enters the valve body case 272. Inflow to. An inflow pipe 24a is connected to the outflow side water pipe attachment portion 274b, and the water flowing into the valve body case 272 flows out through the outflow port 274e.

Further, the outflow side water pipe mounting portion 274b is provided on the opposite side of the inflow side water pipe mounting portion 274a, and the inflow side water pipe mounting portion 274a and the outflow side water pipe mounting portion 274b are directed in parallel in the top view. (Fig. 21). Further, the intake / drainage opening 274c provided on the outer peripheral surface of the main body portion 274 is directed in a direction forming a right angle to the inflow side water pipe mounting portion 274a and the outflow side water pipe mounting portion 274b.

The intake / drain opening 274c is a vertically elongated oval opening (FIG. 19). When the flap valve body 280 is opened, the outside air is sucked through the intake / drain opening 274c, and the water flowing back from the inflow pipe 24a flows out and is discharged into the water storage tank 10. That is, the intake / drainage opening 274c is an opening formed on the vertically oriented surface of the main body portion 274, and is formed longer in the vertical direction than in the horizontal direction. The water flowing back to the drainage / vacuum break valve device 230 is discharged into the water storage tank 10 beyond the lower edge of the intake / drainage opening 274c.

As shown in FIG. 19, the flap valve body 280 is a member composed of two rectangular plate-shaped portions rotatably mounted in the valve body case 272, and opens and closes the intake / drain opening 274c. It is configured as follows. The flap valve body 280 is composed of a first flat plate portion 280a, a second flat plate portion 280b, and a connecting portion 280c connecting them. The first flat plate portion 280a and the second flat plate portion 280b are joined by one long side so as to form a predetermined angle, and the first flat plate portion 280a and the second flat plate portion 280b are connected in a substantially fan shape. They are connected by a portion 280c. Further, as shown in FIG. 20, the second flat plate portion 280b extends from the vicinity of the ceiling surface of the valve body case 272 to the bottom surface. On the other hand, the first flat plate portion 280a extends from the vicinity of the ceiling surface of the valve body case 272 to a position above the bottom surface by a predetermined distance, and is between the lower end of the first flat plate portion 280a and the bottom surface of the valve body case 272. Is provided with a gap.

Further, a shaft 281 extending in the axial direction is provided in the cylindrical valve body case 272. The shaft 281 rotatably supports the joint portion between the first flat plate portion 280a and the second flat plate portion 280b of the flap valve body 280, and the flap valve body 280 is rotated around the shaft 281. In the state where the flap valve body 280 is rotated to the position shown in FIG. 19, the second flat plate portion 280b faces the inflow side water pipe mounting portion 274a, and in the state where the flap valve body 280 is rotated to the position shown in FIG. 1 The flat plate portion 280a faces the intake / drain opening 274c. The shaft 281 is arranged outside the vertical projection plane of the intake / drainage opening 274c. That is, the shaft 281 is located outside the projection plane of the intake / drain opening 274c formed by shining light perpendicular to the intake / drain opening 274c.

Further, as shown in FIG. 20, a torsion coil spring 284 is arranged on the upper side of the flap valve body 280, and the torsion coil spring 284 is attached so as to surround the circumference of the shaft 281. The flap valve body 280 is urged by a torsion coil spring 284 to rotate in the open direction, that is, from the position shown in FIG. 20 to the position shown in FIG.

Further, as described above, the second flat plate portion 280b of the flap valve body 280 faces the inflow port 274d at the base end of the inflow side water pipe mounting portion 274a, and faces the inflow port 274d of the second flat plate portion 280b. A disk-shaped small packing 283 (FIG. 21) is attached to the position where the packing is to be used. Since the water supplied from the water supply control device 18 is discharged from the inflow port 274d toward the second flat plate portion 280b, when the water flows in, the second flat plate portion 280b is pressed and the flap valve body 280 is shown in FIG. 21. It is rotated clockwise. As a result, the flap valve body 280 is rotated from the state shown in FIG. 19 to the state shown in FIG.

Further, as described above, the first flat plate portion 280a of the flap valve body 280 faces the intake / drain opening 274c, and when the flap valve body 280 is rotated to the state shown in FIG. 20, the intake / drain It is configured to cover the opening 274c. Further, a thin plate-shaped packing 282 (FIG. 19) is attached to the surface of the first flat plate portion 280a on the side facing the intake / drain opening 274c, and the flap valve body 280 is rotated to the state shown in FIG. When moved, the space between the first flat plate portion 280a and the intake / drainage opening 274c is sealed. Here, since the shaft 281 supporting the flap valve body 280 is arranged outside the vertical projection surface of the intake / drain opening 274c, the packing is in a state where the flap valve body 280 is rotated to the state shown in FIG. The crushing allowance of 282 can be surely secured.

On the other hand, when water flows back from the inflow pipe 24a to the outflow side water pipe attachment portion 274b, the backflow water creates a gap between the first flat plate portion 280a of the flap valve body 280 and the bottom surface of the valve body case 272. It passes through and hits the back surface of the second flat plate portion 280b. As a result, the flap valve body 280 is rotated from the state shown in FIG. 20 to the state shown in FIG. The water flowing back from the outflow side water pipe attachment portion 274b flows out through the intake / drainage opening 274c and is discharged into the water storage tank 10.

Next, the operation of the flush water tank device and the flush toilet device according to the third embodiment of the present invention will be described.
First, when the instruction signal for cleaning the toilet bowl is received, water is supplied from the water supply control device 18, and water flows into the drainage / vacuum break valve device 230. When water flows into the drainage / vacuum break valve device 230, the second flat plate portion 280b of the flap valve body 280 is pushed, and the flap valve body 280 is moved to the position shown in FIG. 20 against the urging force of the torsion coil spring 284. It is rotated. As a result, the intake / drain opening 274c of the drain / vacuum break valve device 230 is closed by the first flat plate portion 280a of the flap valve body 280. The water flowing in from the inflow port 274d of the drainage / vacuum break valve device 230 bypasses the flap valve body 280 and flows into the inflow pipe 24a from the outflow port 274e in the valve body case 272.

As a result, wash water is supplied to the drain valve hydraulic drive unit 14. Since the toilet bowl cleaning action by the cleaning water tank device after the cleaning water is supplied to the drain valve hydraulic drive unit 14 is the same as that of the first embodiment described above, the description thereof will be omitted.

Next, when the water supply from the water supply control device 18 is stopped after the toilet bowl cleaning is completed, the dynamic pressure due to the water supply acts on the second flat plate portion 280b of the flap valve body 280 provided in the drainage / vacuum break valve device 230. It disappears. As a result, the flap valve body 280 is rotated from the state shown in FIG. 20 to the state shown in FIG. 19 by the urging force of the torsion coil spring 284, and the intake / drain opening 274c is opened. On the other hand, when the water supply from the water supply control device 18 is stopped, the piston 14b (FIG. 4) of the drain valve hydraulic drive unit 14 that has been pushed up to the second position is pushed down by the urging force of the spring 14c. As a result, most of the water filled in the pressure chamber 16a of the cylinder 14a flows back toward the drainage / vacuum break valve device 230 through the inflow pipe 24a.

The water flowing back from the inflow pipe 24a to the drainage / vacuum break valve device 230 flows into the valve body case 272 through the outflow port 274e of the outflow side water pipe mounting portion 274b, as shown by the solid arrow in FIG. It flows out beyond the lower edge of the intake / drain opening 274c. The water flowing out from the intake / drainage opening 274c of the drainage / vacuum break valve device 230 is discharged into the water storage tank 10. Further, since the outflow port 274e is provided below the inflow port 274d, it is possible to prevent the water flowing back into the drainage / vacuum break valve device 230 through the outflow port 274e from flowing back to the inflow port 274d. can do.

Further, since the area of the intake / drainage opening 274c is formed larger than the area of the outlet 274e, the intake / drainage opening 274c is not filled with water flowing back through the outlet 274e, and the backflow does not occur. The drained water is discharged promptly. With this configuration, it is possible to reliably prevent the water flowing back into the drainage / vacuum break valve device 230 through the outflow port 274e from flowing back to the water supply control device 18 on the upstream side. Further, since the water flowing back from the drain valve hydraulic drive unit 14 can be quickly discharged, the water remaining in the cylinder 14a can be discharged at an early stage, and the washing water tank device can be quickly returned to the initial state. ..

On the other hand, when the intake / drain opening 274c of the drain / vacuum break valve device 230 is opened, the outside air passes through the upper part of the intake / drain opening 274c and enters the valve body case 272 as shown by the arrow of the broken line in FIG. Inhaled into. That is, since the intake / drainage opening 274c is formed vertically, the water flowing back through the outlet 274e is discharged from the lower part of the intake / drainage opening 274c, and at the same time, the outside air is discharged from the upper part of the intake / drainage opening 274c. It can be easily introduced. In this way, even when the water supply from the water supply control device 18 is stopped and the side of the inflow side water pipe mounting portion 274a becomes negative pressure, the outside air is sucked from the drainage / vacuum break valve device 230, so that the inflow pipe 24a The backflow of water flowing back from the water supply control device 18 to the water supply control device 18 is prevented.

In this way, the flap valve body 280 of the drainage / vacuum break valve device 230 opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, and at the same time, the water flows back from the drain valve hydraulic drive unit 14. Operates to drain. The drainage / vacuum break valve device 230 has both a function of discharging water flowing back from the downstream side and a function of sucking outside air into the pipeline, and the intake / drainage opening 274c is an intake port for outside air and the inside of the pipeline. Functions as a drainage outlet for water.

According to the washing water tank device of the third embodiment of the present invention, since the flap valve body 280 is supported by the shaft 281 directed in the vertical direction, the flap valve body is substantially unaffected by gravity. The 280 can be rotated.

Next, with reference to FIGS. 22 and 23, a flush water tank device according to a fourth embodiment of the present invention and a flush toilet device including the same will be described.
The washing water tank device of the present embodiment includes a generator, and is different from the above-described first embodiment in that the solenoid valve of the water supply control device is operated by the electric power generated by the generator. Therefore, here, only the configurations, actions, and effects of the fourth embodiment of the present invention, which are different from those of the first embodiment, will be described, and the same configurations will be described with the same reference numerals as those of the first embodiment. Is omitted.

FIG. 22 is a front sectional view showing a schematic configuration of a washing water tank device according to a fourth embodiment of the present invention. FIG. 23 is a plan sectional view showing a schematic configuration of a washing water tank device according to a fourth embodiment of the present invention.

As shown in FIGS. 22 and 23, the washing water tank device 304 according to the fourth embodiment of the present invention includes a generator 310 inside the water storage tank 10. The generator 310 includes a water turbine 310a and a power generation unit 310b. The water turbine 310a is configured to be rotated by the flow of water supplied to the generator 310. Further, the power generation unit 310b is configured to generate electric power by the rotation of the water turbine 310a.

The electric power generated by the generator 310 is sent to the controller 28 and is configured to be stored in a storage battery (not shown) built in the controller 28. As a result, every time the flush toilet body 2 is washed by the flush water tank device 304, water is supplied to the generator 310 to generate electric power, which is stored in a storage battery (not shown). In the washing water tank device 304 of the present embodiment, the solenoid valve 20 of the controller 28 and the water supply control device 18 is operated by the electric power generated by the generator 310 and stored in the storage battery (not shown). Therefore, the washing water tank device 304 can be installed even in a toilet room where an external power source cannot be secured. Since the control of the solenoid valve 20 of the water supply control device 18 by the controller 28 and the operation of the water supply control device 18 are the same as those in the first embodiment described above, the description thereof will be omitted.

Further, as shown in FIG. 22, the generator 310 is attached to the upper end of the overflow pipe 10b so as to be located above the water stop level L ₁ in the water storage tank 10. That is, since the generator 310 is arranged above the upper end opening of the upper end of the overflow pipe 10b, it does not submerge even when the water level in the water storage tank 10 rises. Further, in the present embodiment, the generator 310 divides the inside of the water storage tank 10 into three equal parts in the left-right direction X1 (FIG. 23) in a plan view, and the right side region of the left side region L, the central region C, and the right side region R. It is arranged in R. Further, as shown in FIG. 23, in the present embodiment, the generator 310 is arranged in a region on the rear side in which the inside of the water storage tank 10 is bisected in the front-rear direction Y1 in a plan view.

Further, in the present embodiment, the water supply control device 18 and the drainage / vacuum break valve device 30 are arranged in the left side region L, and the drainage valve hydraulic drive unit 14 is arranged in the central region C. As shown in FIG. 23, in the present embodiment, the drain valve hydraulic drive unit 14 is arranged substantially in the center of the water storage tank 10 in the front-rear direction in a plan view.

Further, in the present embodiment, the drain valve hydraulic drive unit 14 includes an outer shell portion 314. The outer shell portion 314 is a frame-shaped member that supports the cylinder 14a of the drain valve hydraulic drive portion 14 with respect to the water storage tank 10, and the cylinder 14a is provided above the outer shell portion 314. Further, as shown in FIG. 23, the outer shell portion 314 is arranged so as to surround the drain valve 12 in a plan view.

Here, as shown in FIG. 22, the water supply control device 18 and the drainage / vacuum break valve device 30 are connected by a water pipe 320, and the drainage / vacuum break valve device 30 and the cylinder 14a are connected by a water pipe 322. Has been done. Further, the cylinder 14a and the generator 310 are connected by a water pipe 324, and a water pipe 326 is connected to the downstream side of the generator 310. The water pipe 326 extending from the generator 310 once extends upward, and even after the supply of water to the generator 310 is stopped, water remains around the water turbine 310a in the generator 310. It is designed to do.

With such a configuration, the water supplied from the water supply control device 18 flows into the drainage / vacuum break valve device 30 through the water pipe 320, and the water flowing out from the drainage / vacuum break valve device 30 passes through the water pipe 322. And flows into the cylinder 14a. Further, the water flowing out from the cylinder 14a flows into the generator 310 through the water pipe 324, and the water flowing out from the generator 310 flows into the water storage tank 10 through the water pipe 326. That is, the water flowing into the water pipe 326 from the generator 310 flows out from the outlet 326a at the end of the water pipe 326 and lands on the water landing position Q1 on the water surface in the water storage tank 10.

As shown in FIG. 22, the water pipe 326 extends substantially horizontally from the generator 310 arranged in the right side region R of the water storage tank 10 to the outlet 326a located in the left side region L, and extends from the outlet 326a. The landing position Q1 of the outflow water W1 is also located in the left side region L. Therefore, the generator 310 arranged in the right side region R is arranged on the opposite side of the water landing position Q1 located in the left side region L with the outer shell portion 314 of the drain valve hydraulic drive unit 14 interposed therebetween. In other words, when the inside of the water storage tank 10 is divided into three equal parts in the left-right direction X1 in the left-right direction X1, the left side region L, the central region C, and the right side region R, the generator 310 is the region to which the water landing position Q1 belongs. Are located in different areas. As a modification, the present invention may be configured so that the generator 310 is arranged in the left side region L and the water landing position Q1 is located in the right side region R.

Further, in the present embodiment, since the drainage / vacuum break valve device 30 is also arranged in the left side region L, the landing position of the water W2 drained from the intake / drain opening 74c of the drainage / vacuum break valve device 30. Q2 is also located in the left side region L. Therefore, the generator 310 arranged in the right side region R is arranged on the opposite side of the water landing position Q2 located in the left side region L with the outer shell portion 314 of the drain valve hydraulic drive unit 14 interposed therebetween. .. In other words, when the inside of the water storage tank 10 is divided into three equal parts in the left-right direction X1 in the left-right direction X1, the left side region L, the central region C, and the right side region R, the generator 310 is the region to which the water landing position Q2 belongs. Are located in different areas. As a modification, the present invention may be configured so that the generator 310 is arranged in the left side region L and the water landing position Q2 is located in the right side region R.

Further, as shown in FIG. 23, the landing position Q2 of the water W2 drained from the intake / drain opening 74c of the drainage / vacuum break valve device 30 is bisected in the front-rear direction Y1 in the water storage tank 10 in a plan view. It is located in the area on the front side. Therefore, the generator 310 arranged in the region on the rear side of the water storage tank 10 is arranged on the opposite side of the water landing position Q2 located in the region on the front side with the outer shell portion 314 of the drain valve hydraulic drive unit 14 interposed therebetween. Has been done. In other words, the generator 310 is arranged in a region different from the region to which the landing position Q2 belongs when the inside of the water storage tank 10 is bisected in the front-rear direction. As a modification, the present invention may be configured so that the generator 310 is arranged in the front region and the water landing position Q2 is located in the rear region.

According to the washing water tank device 304 of the fourth embodiment of the present invention, the generator 310 is arranged above the water stop level L ₁ in the water storage tank 10 (FIG. 22), and is left and right in a plan view. In the direction, the water discharged from the drainage / vacuum break valve device 30 is arranged on the opposite side of the outer shell portion 314 with respect to the water landing position Q2 where the water discharged from the drainage / vacuum break valve device 30 lands on the water surface in the water storage tank 10. As a result, the water flowing out from the drainage / vacuum break valve device 30 lands on the water surface in the water storage tank 10, and the scattered water is blocked by the outer shell portion 314, so that the water cover of the generator 310 can be suppressed. can.

Further, according to the washing water tank device 304 of the present embodiment, the generator 310 is in a region different from the region to which the landing position Q2 belongs in the left side region L, the central region C, and the right side region R in the plan view. Is arranged (FIG. 22), so that a relatively large distance between the landing position Q2 and the generator 310 can be secured. As a result, it is possible to effectively prevent the water flowing out from the drainage / vacuum break valve device 30 from landing on the water surface in the water storage tank 10 and the scattered water from being applied to the generator 310.

Further, according to the washing water tank device 304 of the present embodiment, the water landing position Q2 of the water flowing out from the drainage / vacuum break valve device 30 is located in the left side region L in the water storage tank 10, whereas the generator. The 310 is arranged in the right side region R (FIG. 22). Therefore, a relatively large distance between the landing position Q2 in the water storage tank 10 and the generator 310 can be secured, and the water flowing out from the drainage / vacuum break valve device 30 reaches the water surface in the water storage tank 10. It is possible to effectively prevent the water and the scattered water from being applied to the generator 310.

Further, according to the washing water tank device 304 of the present embodiment, the generator 310 is on the opposite side of the water landing position Q2 of the water flowing out from the drainage / vacuum break valve device 30 with the outer shell portion 314 in the front-rear direction. (FIG. 23), the water flowing out from the drainage / vacuum break valve device 30 can land on the landing position Q2 and block the scattered water by the outer shell portion 314, and the cover of the generator 310 can be blocked. Water can be effectively suppressed.

Further, according to the washing water tank device 304 of the present embodiment, since the cylinder 14a of the drain valve hydraulic drive unit 14 is provided above the outer shell portion 314 (FIG. 22), it flows out from the drain / vacuum break valve device 30. The water that has landed on the water landing position Q2 can be blocked by the cylinder 14a, and the water coverage of the generator 310 can be suppressed more effectively.

Although the washing water tank device and the flush toilet device provided with the washing water tank device according to the embodiment of the present invention have been described above, various changes can be made to the above-described embodiment. In particular, in the above-described embodiment, the drainage / vacuum break valve device is provided with a flap type valve body, but any type of valve body such as a linear motion type valve body can be applied.

1 Flush toilet device 2 Flush toilet body (flush toilet)
2a Bowl part 4 Washing water tank device 6 Remote control device 8 Motion sensor 10 Water storage tank 10a Drainage port 10b Overflow pipe 12 Drainage valve 12a Valve shaft 12b Valve body part 12c Engagement protrusion 12d Support part 14 Drainage valve Water pressure drive part 14a Cylinder 14b Piston 14c Spring 14d Gap 14e Packing (elastic member)
14f Sleeve 14g Outflow guide part 15 Rod (driving member)
15a Thin-walled part 15b Pulling upper part 15c Upper surface 15d Contacted part 16a Pressure chamber 16b Back pressure chamber 17 Communication flow path 17a Upper end opening (back pressure chamber opening)
17b Side opening (rod opening)
17c Edge 18 Water supply control device 20 Solenoid valve 22 Clutch mechanism 24a Inflow pipe 24b Outflow pipe 24c Outflow pipe branch 24d Orifice (flow rate suppressing means)
25a Inlet 25b Outlet 26 Drain valve Float mechanism (float mechanism)
26a Float part (float)
26b Engagement part 26c Float shaft 28 Controller 30 Drainage / vacuum break valve device 32 Water supply pipe 32a Stopcock 32b Constant flow valve 34 Water supply valve float 36 Main body 36a Pressure chamber 38 Main valve body 40 Valve seat 42 Arm part 44 Float side Pilot valve 50 Electromagnetic valve side pilot valve 60 Movable member 62 Base plate 64 Arm 66 Rotating shaft 68 Contact part 70 Restriction part 72 Valve body case 74 Main body part 74a Opening part 74b Mounting part 74c Intake / drainage opening 74d Upper edge 74e Lower edge 76 Inflow pipe connection member 76a Water flow pipe mounting part 76b Bearing part 76c Inflow port 78 Outflow pipe connection member 78a Water flow pipe mounting part 78b Outlet 80 Flap valve body (valve body)
80a Support axis (central axis)
80b Supply water receiving part 80c Valve plate part 80d Drainage receiving part 80e Weight mounting part 82 Packing 82a Weight 84 Coil spring (urgency spring)
90 Negative pressure destruction valve 92 Negative pressure destruction valve body 94 Atmospheric opening 96a Main valve port 96b Main valve body 98 Outlet 130 Drainage / vacuum destruction valve device 172 Valve body case 174 Main body 174a Upper mounting part 174b Lower mounting part 174c Intake / Drainage opening 174d Upper edge 174e Lower edge 176 Lid member 176a Bearing part 177 Inflow pipe connecting member 177a Water pipe mounting part 177b Inflow port 178 Outflow pipe connecting member 178a Water pipe mounting part 178b Outlet 180 Flap valve body 180a Support shaft 180b Valve plate Part 180c Drainage receiving part 180d Weight mounting part 182 Packing 182a Weight 230 Drainage / vacuum break valve device 272 Valve body case 274 Main body part 274a Inflow side water pipe mounting part 274b Outflow side water pipe mounting part 274c Intake / drainage opening 274d Inflow port 274e Outlet 276 Cover member 278 Cover 280 Flap valve body 280a First flat plate part 280b Second flat plate part 280c Connecting part 281 Shaft 282 Packing 283 Small packing 284 Twist coil spring 304 Washing water tank device 310 Generator 310a Water pipe 310b Power generation part 314 Outer shell Part 320 Water pipe 322 Water pipe 324 Water pipe 326 Water pipe 326a Outlet

Claims (20)

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,
The drain valve hydraulic pressure drive unit that drives the drain valve using the water supply pressure of the supplied water,
It has a drainage / vacuum break valve device provided on the upstream side of the drainage valve hydraulic drive unit and supplying water supplied from the upstream side to the drainage valve hydraulic drive unit on the downstream side.
The drain valve hydraulic drive unit
A cylinder into which water supplied through the drainage / vacuum break valve device flows in,
It has a piston that is slidably arranged in the cylinder and is moved by the pressure of the water flowing into the cylinder to move the drain valve.
The drainage / vacuum break valve device opens the upstream side to the atmosphere when the supply of water from the upstream side is stopped, and at the same time, operates to drain the water flowing back from the drainage valve hydraulic drive unit. A wash water tank device characterized by being equipped with. The drainage / vacuum break valve device includes an inlet for inflowing supplied water, an outlet for supplying the inflowing water to the drainage valve hydraulic drive unit, and an intake / drainage opening opened and closed by the valve body. The washing water tank device according to claim 1, wherein the inlet is provided above the outlet, and the intake / drain opening is formed on a vertical surface or an inclined surface. The washing water tank device according to claim 2, wherein the area of the intake / drain opening of the drainage / vacuum break valve device is larger than the area of the outlet of the drainage / vacuum break valve device. The washing water tank device according to claim 2 or 3, wherein the intake / drain opening of the drain / vacuum break valve device is formed longer in the vertical direction than in the horizontal direction. The valve body of the drainage / vacuum break valve device is rotatably provided around a predetermined central axis, and the intake / drainage opening is opened / closed by being rotated to open / close the intake / drainage opening. The wash water tank device described in the section. The washing water tank device according to claim 5, wherein the predetermined central axis is arranged outside the vertical projection plane of the intake / drainage opening. The intake / drainage opening is formed so that its lower edge extends in the horizontal direction, and the water flowing back from the drainage valve hydraulic drive unit to the drainage / vacuum break valve device crosses the lower edge and enters the water storage tank. The washing water tank device according to any one of claims 2 to 6, which is discharged to. The washing water tank device according to claim 7, wherein the intake / drain opening is formed so that its upper edge extends in the horizontal direction. The cleaning according to any one of claims 1 to 8, wherein the valve body is in a standby posture in which the position of the center of gravity of the valve body is the lowest when water is not supplied to the drainage / vacuum break valve device. Water tank device. The washing water tank device according to claim 9, wherein the valve body includes a weight. The drainage / vacuum break valve device includes an urging spring, and the urging spring according to any one of claims 2 to 10 for urging the valve body in a direction of opening the intake / drainage opening. Washing water tank device. The washing water tank device according to claim 11, wherein the urging spring is configured such that the increase in the urging force with respect to the increase in the amount of deformation increases as the amount of deformation increases. The washing water tank device according to claim 11, wherein the urging spring is configured so that the urging force is not applied to the valve body when the intake / drain opening is opened by a predetermined amount or more. The washing water tank device according to any one of claims 1 to 13, further comprising a flow control means for suppressing the flow rate of water flowing back from the drain valve hydraulic drive unit to the drain / vacuum break valve device. Further, a water wheel rotated by the flow of supplied water, and a generator equipped with a power generation unit that generates electric power by the rotation of the water wheel.
It is equipped with a solenoid valve operated by the electric power generated by this generator, and has a water supply control device for controlling water supply and stop to the drainage / vacuum break valve device.
The drain valve hydraulic drive unit includes an outer shell portion arranged so as to surround at least a part of the drain valve in a plan view, and the generator is arranged above the water stop level in the water storage tank. At the same time, in the left-right direction in the plan view, the water drained from the drainage / vacuum break valve device is arranged on the opposite side of the outer shell portion with respect to the landing position where the water is landed on the water surface in the water storage tank. The washing water tank device according to claim 1. When the inside of the water storage tank is divided into three equal parts, the left side region, the central region, and the right side region in the left-right direction in a plan view, the generator is arranged in a region different from the region to which the water landing position belongs. The washing water tank device according to claim 15. The water landing position is located in either the left side region or the right side region in the water storage tank in a plan view, and the generator is located in the left side region or the right side in the water storage tank in a plan view. 16. The wash water tank device according to claim 16, which is located on either side of the area. The washing water according to any one of claims 15 to 17, wherein the generator is arranged on the opposite side of the water landing position with respect to the outer surface portion of the drain valve hydraulic drive unit in the front-rear direction. Tank device. The washing water tank device according to any one of claims 15 to 18, wherein the cylinder of the drain valve hydraulic drive unit is provided above the outer shell portion. It ’s a flush toilet device,
The washing water tank device according to any one of claims 1 to 19.
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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