A flushing water tank device, and a flush toilet device equipped therewith.

Abstract

The present invention aims to provide a flushing water tank device that can continuously discharge flushing water from a water storage tank for a long period of time, thereby suppressing the generation of wasted water, and a flush toilet device equipped therewith. [Solution] The present invention relates to a flushing water tank device used attached to a toilet bowl body to supply flushing water, and a flush toilet device equipped therewith, comprising: a storage tank for storing flushing water to be supplied to the toilet bowl body; a water supply valve for supplying flushing water into the storage tank; a drain valve for opening and closing a drain port provided in the storage tank to supply the flushing water in the storage tank to the toilet bowl body; and an operating unit for driving the drain valve, and further comprising a load-applying means (water weight member) for applying a load to the drain valve while flushing water is being supplied to the storage tank.

Description

Technical Field

[0001] The present invention relates to a washing water tank device and a water-washed toilet device provided with the same, and particularly to a washing water tank device attached to a toilet body for supplying washing water and a water-washed toilet device provided with the same.

Background Art

[0002] Conventionally, as described in Patent Document 1, a water-washed toilet device provided with a hydraulic drive mechanism driven by the water supply pressure of washing water supplied from a water supply and a drain valve that is opened in accordance with the drive of the hydraulic drive mechanism is provided in a storage tank. known. The hydraulic drive mechanism includes a cylinder and a piston disposed in the cylinder and interlocked with the drain valve. The drain valve also includes a clutch mechanism for connecting or disconnecting from the piston. With such a configuration, when washing water is supplied to the hydraulic drive mechanism of the water-washed toilet device, the washing water flowing into the cylinder pushes up the piston and pulls up the drain valve. Further, when the drain valve of the water-washed toilet device is pulled up to a predetermined height, the drain valve is disconnected from the piston by the clutch mechanism, and the drain valve descends due to its own weight.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, in the flush toilet device described in Patent Document 1 mentioned above, it is conceivable that a drain valve for rim discharge and a drain valve for jet discharge are provided in the storage tank. The flow rate of flushing water discharged from each of the drain valves is set to be relatively small compared to the case where there is only one conventional drain valve. Therefore, when only one of the drain valves is raised, the supply flow rate of flushing water supplied into the storage tank from the supply valve may be equal to (balanced) the drain flow rate of flushing water discharged outside the storage tank from the drain valve. When the supply flow rate and the drain flow rate are equal, the drain valve does not close, and flushing water continues to be discharged from the storage tank for a long time, resulting in wasted water.

[0005] Therefore, the present invention aims to provide a flushing water tank device that can prevent the wasteful generation of flushing water by allowing flushing water to be continuously discharged from the storage tank for a long period of time, and a flush toilet device equipped therewith. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flushing water tank device that is attached to a toilet bowl body for supplying flushing water, comprising: a storage tank for storing flushing water to be supplied to the toilet bowl body; a water supply valve for supplying flushing water into the storage tank; a drain valve for opening and closing a drain port provided in the storage tank to supply the flushing water in the storage tank to the toilet bowl body; and an operating unit for driving the drain valve, and further comprising a load-applying means for applying a load to the drain valve while flushing water is being supplied to the storage tank.

[0007] According to the present invention configured in this way, since a load-applying means is provided to apply a load to the drain valve while cleaning water is being supplied to the storage tank, the cleaning water can be continuously discharged from the storage tank for a long period of time, preventing the generation of wasted water.

[0008] In the present invention, preferably, the load-applying means is a water weight member in which cleaning water is stored.

[0009] According to the present invention configured in this way, the load-applying means is a water weight member that stores cleaning water, so with a simple configuration, cleaning water can be continuously discharged from the storage tank for a long period of time, preventing the generation of wasted water.

[0010] Furthermore, in the present invention, preferably, the water weight member comprises a storage section for storing cleaning water and a drain hole formed in the storage section for discharging the cleaning water stored in the storage section. While cleaning water is being supplied from the storage tank to the toilet bowl body, the cleaning water in the storage section is discharged from the drain hole in accordance with the decrease in the water level in the storage tank, and while cleaning water is being supplied to the storage tank, cleaning water flows into the storage section and is stored therein.

[0011] With the present invention configured in this way, while flushing water is being supplied from the storage tank to the toilet bowl body, the flushing water in the storage section is configured to be discharged from the drain hole in accordance with the decrease in the water level in the storage tank, so the drain valve can be opened without applying any load to it. On the other hand, while flushing water is being supplied to the storage tank, the flushing water is configured to flow into and be stored in the storage section, so the drain valve can be closed by applying a load to it.

[0012] In the present invention, preferably, the drainage hole is formed in the bottom wall of the water weight member, and the bottom wall of the water weight member is inclined downward toward the drainage hole.

[0013] According to the present invention configured in this manner, the drain hole is formed on the bottom surface of the water weight member, and the bottom surface of the water weight member is inclined downward toward the drain hole. Therefore, the cleaning water in the storage section can be directed toward the drain hole, and thus the cleaning water in the storage section can be discharged from the drain hole in accordance with the decrease in the water level in the storage tank.

[0014] Furthermore, in the present invention, preferably, the drain valve comprises a first drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a first drain port formed in the storage tank, and a second drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a second drain port formed in the storage tank, and the water weight member is provided in the first drain valve.

[0015] According to the present invention configured as described above, the drain valve includes a first drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a first drain port formed in the storage tank, and a second drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a second drain port formed in the storage tank. Since the water weight member is provided on the first drain valve, a load can be applied to the first drain valve while flushing water is being supplied to the storage tank, causing the first drain valve to close.

[0016] In the present invention, preferably, the storage tank comprises an outer tank provided with a first drain valve and an inner tank disposed inside the outer tank and provided with a second drain valve, and is configured such that the cleaning water overflowing from the inner tank flows into the outer tank and into the water weight member.

[0017] According to the present invention configured in this way, the storage tank comprises an outer tank provided with a first drain valve, and an inner tank disposed inside the outer tank and provided with a second drain valve. The washing water overflowing from the inner tank flows into the outer tank and into the water weight member. Therefore, the washing water stored in the inner tank can be used to store washing water in the water weight member.

[0018] Furthermore, in the present invention, preferably, an opening is formed at the upper edge of the inner tank to allow the cleaning water overflowing from the inner tank to flow into the water weight member.

[0019] According to the present invention configured as described above, an opening for allowing the washing water overflowing from the inner tank to flow into the water hammer member is formed at the upper end edge of the inner tank, so that the flow rate of the washing water flowing into the water hammer member can be adjusted by the opening.

[0020] Further, in the present invention, preferably, it is a water-washing toilet device provided with a washing water tank device.

[0021] According to the present invention configured as described above, it is possible to provide a water-washing toilet device provided with a washing water tank device that can prevent the washing water from being continuously discharged from the storage tank for a long time and generating waste water.

Effect of the Invention

[0022] According to the washing water tank device of the present invention and the water-washing toilet device provided with the same, it is possible to suppress the continuous discharge of the washing water from the storage tank for a long time and the generation of waste water.

Brief Description of the Drawings

[0023] [Figure 1] It is a block diagram showing the overall configuration of the water-washing toilet device according to an embodiment of the present invention. [Figure 2] It is a top view showing the schematic configuration of the water-washing toilet device according to an embodiment of the present invention. [Figure 3] It is a schematic perspective view of the washing water tank device provided in the water-washing toilet device according to an embodiment of the present invention. [Figure 4] It is a schematic cross-sectional view of the first drain valve of the washing water tank device according to an embodiment of the present invention. [Figure 5] It is a schematic cross-sectional view of the second drain valve and the hydraulic drive mechanism of the washing water tank device according to an embodiment of the present invention. [Figure 6] It is a schematic cross-sectional view of the hydraulic drive mechanism of the washing water tank device according to an embodiment of the present invention. [Figure 7] It is a perspective view of the first drain valve of the washing water tank device according to an embodiment of the present invention. [Figure 8]This is an exploded perspective view of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 9] This is a top view of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 10] This is a cross-sectional view along line XX in Figure 9. [Figure 11A] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 11B] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 11C] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 11D] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 11E] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Figure 11F] This is a schematic diagram illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0024] Next, with reference to the attached drawings, a flushing water tank device according to an embodiment of the present invention and a flush toilet device equipped therewith will be described. Figure 1 is a block diagram showing the overall configuration of a flush toilet device according to an embodiment of the present invention, Figure 2 is a top view showing the schematic configuration of a flush toilet device according to an embodiment of the present invention, and Figure 3 is a schematic perspective view of a flush water tank device provided in a flush toilet device according to an embodiment of the present invention. In this specification, when viewing a flush toilet unit from the front, the front side is referred to as "front," the back side as "rear," the left side as "left," and the right side as "right."

[0025] As shown in Figures 1 and 2, the flush toilet device 1 according to an embodiment of the present invention comprises a ceramic toilet bowl body 2 and a flush water tank device 4 located at the rear of the toilet bowl body 2. The flush toilet device 1 of this embodiment is configured so that the toilet bowl is flushed by operating a lever handle 4a (operating part) provided on the flush water tank device 4.

[0026] The toilet bowl body 2 comprises a bowl portion 2a and a drain trap pipe 2b extending from the lower part of the bowl portion 2a. A rim outlet 2c is provided on the upper edge of the bowl portion 2a, and a jet outlet 2d is provided on the lower part of the bowl portion 2a. When the toilet is flushed, flushing water is discharged from these rim outlets 2c and jet outlets 2d at predetermined timings, cleaning the waste receiving surface of the bowl portion 2a, and the waste and flushing water in the bowl portion 2a are discharged into the drain trap pipe 2b. The waste and flushing water discharged into the drain trap pipe 2b are then discharged into the sewer pipe (not shown) through a drain socket (not shown).

[0027] The flushing water tank device 4 is supplied with flushing water from a water source 6, such as a water supply, and the supplied flushing water is stored inside the flushing water tank device 4. The flushing water tank device 4 also has a first drain valve 8 and a second drain valve 10 built into it. In this embodiment, by opening the first drain valve 8, the flushing water is discharged from the rim outlet 2c through the rim water channel 2e formed inside the toilet bowl body 2. By opening the second drain valve 10, the flushing water is discharged from the jet outlet 2d through the jet water channel 2f formed inside the toilet bowl body 2.

[0028] Next, the internal structure of the cleaning water tank device will be described with reference to Figures 1 to 3. As shown in Figures 1 to 3, the flushing water tank device 4 comprises an outer tank 12 (storage tank), an inner tank 14 located inside the outer tank 12, a first drain valve 8 located inside the outer tank 12, a second drain valve 10 located inside the inner tank 14, a water supply valve 16, a water pressure drive mechanism 18, and an operating unit 20. In the standby state (before toilet flushing is started), flushing water is stored in the flushing water tank device 4 up to the shut-off water level WL0.

[0029] The outer tank 12 and the inner tank 14 are containers configured to store flushing water to be supplied to the toilet bowl body 2. In this embodiment, the outer tank 12 is made of ceramic, and the inner tank 14, which is located inside the outer tank 12, is made of resin.

[0030] Furthermore, as shown in Figure 1, a first drain port 12a and a second drain port 12b are provided on the bottom surface of the outer tank 12, and in this embodiment, these drain ports are circular in shape. Here, the flushing water stored in the outer tank 12 (and outside the inner tank 14) flows into the rim water channel 2e of the toilet bowl body 2 through the first drain port 12a, and the flushing water stored in the inner tank 14 flows into the jet water channel 2f of the toilet bowl body 2 through the second drain port 12b.

[0031] The inner tank 14 is positioned on the bottom surface of the outer tank 12, and the lower part of the inner tank 14 is submerged in the flushing water stored in the outer tank 12. A circular drain port 14a is formed on the bottom surface of the inner tank 14. This drain port 14a of the inner tank 14 is arranged concentrically with the second drain port 12b provided in the outer tank 12. That is, in this embodiment, the center of the circular second drain port 12b and the circular drain port 14a coincide when viewed from above. Therefore, the flushing water in the inner tank 14 flows into the jet water channel 2f of the toilet bowl body 2 through the drain port 14a of the inner tank 14 and the second drain port 12b of the outer tank 12.

[0032] Furthermore, as shown in Figure 2, the outer tank 12 of the flushing water tank device 4 is configured in a roughly rectangular shape when viewed from above, with the left-right direction being longer and the front-back direction being shorter. The inner tank 14, which is located inside the outer tank 12, is also configured in a way that the left-right direction is longer and the front-back direction is shorter when viewed from above, and is also irregularly shaped to avoid the first drain valve 8 and the water supply valve 16.

[0033] In this embodiment, a water supply valve 16 is located at the front left end (lower left corner in Figure 2) of the outer tank 12, and a first drain valve 8 is located at the front right end (lower right corner in Figure 2). The inner tank 14 is formed to avoid these water supply valve 16 and first drain valve 8 when viewed from above.

[0034] Furthermore, in this embodiment, the upper end of the inner tank 14 is configured to be at substantially the same height around its entire circumference. Therefore, when the cleaning water supplied to the inner tank 14 overflows and flows into the outer tank 12, the cleaning water flows into the outer tank over the entire circumference of the upper edge of the inner tank 14.

[0035] As shown in Figure 1, stepped portions 14b are formed on both the left and right sides of the inner tank 14, and the lower part is configured to be narrower. That is, the inner tank 14 is formed in a roughly T-shape when viewed from the front, and at least the lower part of the inner tank 14 is submerged in the cleaning water stored in the outer tank 12. In other words, the inner tank 14 is configured so that its cross-sectional area changes in the height direction, and the horizontal cross-sectional area at the top of the inner tank 14 is larger than the horizontal cross-sectional area at the bottom. As a result, a large amount of cleaning water with high potential energy is stored at the top of the inner tank 14, which increases the hydrostatic pressure of the cleaning water discharged from the inner tank 14 and increases the instantaneous flow rate of the discharged cleaning water.

[0036] Next, the first drain valve 8 is a valve body positioned to open and close the first drain port 12a provided in the outer tank 12. When the first drain valve 8 is pulled upward, the first drain port 12a is opened. As a result, the flushing water in the outer tank 12 is discharged into the rim water channel 2e (Figure 1) of the toilet bowl body 2 and discharged from the rim outlet 2c. Therefore, the first drain valve 8 switches the supply of flushing water stored in the outer tank 12 to the toilet bowl body 2 on and off.

[0037] In this embodiment, the user rotates a lever handle 4a provided on the flushing water tank device 4, which pulls a wire 20a (Figure 3) connected to the first drain valve 8, thereby raising the first drain valve 8. As a modification, the present invention can also be configured so that the first drain valve 8 is raised and the toilet is flushed based on a control signal from a remote control device (not shown) or a detection signal from a motion sensor (not shown).

[0038] Next, the second drain valve 10 is a valve body positioned to open and close the drain port 14a provided in the inner tank 14. By pulling the second drain valve 10 upward, the second drain valve 10 separates from the seat surface of the drain port 14a, and the drain port 14a opens. As a result, the flushing water in the inner tank 14 is discharged from the drain port 14a, flows through the drain port 14a into the jet water channel 2f (Figure 1) of the toilet bowl body 2, and is discharged from the jet outlet 2d. Therefore, the second drain valve 10 switches the supply of flushing water stored in the inner tank 14 to the toilet bowl body 2 on and off.

[0039] Furthermore, in this embodiment, the second drain valve 10 is configured to be pulled up from the drain port 14a by a hydraulic drive mechanism 18. That is, the second drain valve 10 is a valve body 10b with a valve stem 10c extending upward, and the valve stem 10c is pulled up by the hydraulic drive mechanism 18. When the second drain valve 10 is pulled up to a predetermined height, it is detached from the hydraulic drive mechanism 18 and slowly descends to close the drain port 14a. The configuration of the hydraulic drive mechanism 18 will be described later, but the present invention can also be applied to a washing water tank device that is not equipped with a hydraulic drive mechanism 18.

[0040] Furthermore, the water supply valve 16 is configured to switch the supply and stop of cleaning water supplied from the water source 6 to the hydraulic drive mechanism 18, the outer tank 12, and the inner tank 14. The water supply valve 16 comprises a main body 16a, an inlet pipe 16b connecting the main body 16a to the water source 6, an outlet pipe 16c connecting the main body 16a to the hydraulic drive mechanism 18, a valve body (not shown) provided inside the main body 16a for switching the supply and stop of cleaning water from the inlet pipe 16b to the outlet pipe 16c, and a float 16d that opens and closes the valve body in conjunction with the water level in the cleaning water tank device 4.

[0041] As shown in Figures 2 and 3, the operating unit 20 includes a wire 20a connected to the first drain valve 8, an operating rotation shaft 20b that transmits the rotation of the lever handle 4a, a gear unit 20c that winds up the wire 20a in accordance with the rotation of the operating rotation shaft 20b, a ball chain 20d connected to the regulating mechanism 22, and a ball chain mounting member 20e for attaching the ball chain 20d. The operating unit 20 is configured such that when the lever handle 4a is rotated to one side, a small flush is performed, and when the lever handle 4a is rotated to the other side, a large flush is performed.

[0042] The operating rotation shaft 20b extends horizontally from side to side within the outer tank 12 (and above the inner tank 14). The left end of the operating rotation shaft 20b passes through the outer tank 12 and is connected to the lever handle 4a. The operating rotation shaft 20b rotates in conjunction with the rotation of the lever handle 4a. The operating rotation shaft 20b is provided with a gear unit 20c and a ball chain mounting member 20e.

[0043] The gear unit 20c is configured to wind up the wire 20a in accordance with the rotation of the operating rotation shaft 20b. Inside the gear unit 20c are multiple gears (not shown), and the gear ratio of these multiple gears amplifies the amount of rotation of the operating rotation shaft 20b, thereby winding up the wire 20a. The wire 20a is slidably mounted inside the flexible tube 20f, with one end connected to the gear unit 20c and the other end connected to the first drain valve 8. When the wire 20a is wound up by the gear unit 20c, it pulls up the first drain valve 8.

[0044] The ball chain mounting member 20e is configured to rotate together with the operating rotation shaft 20b to pull up the ball chain 20d. The ball chain mounting member 20e comprises a cylindrical tube 20g extending in the axial direction of the operating rotation shaft 20b, a ball chain mounting portion 20h to which the ball chain 20d is attached, and a guide portion 20i that guides the movement of the ball chain 20d. The ball chain mounting portion 20h extends perpendicular to the axial direction of the operating rotation shaft 20b and in the forward direction. The ball chain mounting member 20e is integrally fixed to the operating rotation shaft 20b and rotates together with the operating rotation shaft 20b. As a result, when the lever handle 4a is rotated, the operating rotation shaft 20b and the ball chain mounting member 20e rotate in conjunction, pulling up the ball chain 20d. One end of the ball chain 20d is connected to the ball chain mounting portion 20h, and the other end is connected to the regulating mechanism 22.

[0045] Next, the configuration of the first drain valve 8 will be explained with reference to Figure 4. Figure 4 is a schematic cross-sectional view of the first drain valve of a washing water tank device according to an embodiment of the present invention. As shown in Figure 4, the first drain valve 8 comprises a valve seat portion 8a provided at the first drain port 12a, a valve body 8b that opens and closes the valve seat portion 8a, and a valve shaft 8c extending upward from the valve body 8b. The first drain valve 8 is designed so that the vertical movement of the valve shaft 8c is guided by a guide member 8d provided on the bottom surface of the outer tank 12. A wire 20a is connected to the upper part of the valve shaft 8c, and when the user rotates the lever handle 4a, the valve body 8b and valve shaft 8c are pulled up by the wire 20a.

[0046] The first drain valve 8 is equipped with a float 38 that provides buoyancy to the first drain valve 8. The float 38 is a hollow cylindrical member and is configured to receive buoyancy from the cleaning water stored in the outer tank 12. A through hole 38a is formed in the center of the float 38 through which the valve stem 8c of the first drain valve 8 passes. The float 38 is fixed so as to be movable vertically relative to the valve stem 8c of the first drain valve 8, and the height position of the float 38 can be adjusted. When the water level in the outer tank 12 drops to the position of the float 38, the first drain valve 8 descends in accordance with the drop in the water level in the outer tank 12.

[0047] Furthermore, the first drain valve 8 is provided with a water weight member 40 (load-applying means) above the float 38. The water weight member 40 is a member that applies a load to the first drain valve 8 to close it when the first drain valve 8 is opened while flushing water is being supplied to the outer tank 12. The water weight member 40 comprises a storage section 40a for storing flushing water, a drain hole 40b provided in the storage section 40a, and a mounting section 40c that is attached to the valve stem 8c of the first drain valve 8. While flushing water is being supplied from the outer tank 12 to the toilet bowl body 2, the water weight member 40 does not apply a load to the first drain valve 8 as a water weight, as the flushing water in the storage section 40a is discharged from the drain hole 40b as the flushing water in the outer tank 12 decreases. On the other hand, while cleaning water is being supplied to the outer tank 12, a portion of the cleaning water flowing from the inner tank 14 into the outer tank 12 flows into the storage section 40a, and the cleaning water is stored in the storage section 40a, thus adding a load to the first drain valve 8 as a water weight. In other words, because the cleaning water stored in the storage section 40a adds a load to the first drain valve 8, the first drain valve 8 can be closed even if it is opened while cleaning water is being supplied to the outer tank 12.

[0048] Next, the configuration of the second drain valve 10 will be described with reference to Figure 5. Figure 5 is a schematic cross-sectional view of the second drain valve and hydraulic drive mechanism of a washing water tank device according to an embodiment of the present invention. The second drain valve 10 comprises a valve seat portion 10a provided at the drain port 14a, a valve body 10b that opens and closes the valve seat portion 10a, and a valve shaft 10c extending upward from the valve body 10b. The second drain valve 10 is designed so that the vertical movement of the valve shaft 10c is guided by a guide member 10d provided on the bottom surface of the inner tank 14. The valve shaft 10c has a first projection 10e and a second projection 10f formed to be engageable with the first float 26 and the second float 28, respectively. A clutch mechanism 24 is provided on the upper part of the valve shaft 10c, and the valve shaft 10c is connected to the rod 18c of the hydraulic drive mechanism 18 via this clutch mechanism 24. The clutch mechanism 24 connects the second drain valve 10 to the hydraulic drive mechanism 18, and the second drain valve 10 is lifted by the driving force of the hydraulic drive mechanism 18. Furthermore, when the second drain valve 10 is raised to a predetermined height, the clutch mechanism 24 is disengaged, and the second drain valve 10 descends under its own weight.

[0049] The second drain valve 10 is provided with a first float 26 (float for large-scale flushing) that generates buoyancy for the second drain valve 10 during large-scale flushing, and a second float 28 (float for small-scale flushing) that generates buoyancy for the second drain valve 10 during small-scale flushing. The first and second floats 26 and 28 are hollow rectangular parallelepiped members and are configured to receive buoyancy from the flushing water stored in the flushing water tank device 4. The second drain valve 10 is held in place by the first and second floats 26 and 28 for a predetermined time, after which it begins to descend by its own weight. The first and second floats 26 and 28 are attached to first and second shaft members 30 and 32 that extend in the vertical direction, respectively. The first shaft member 30 and the second shaft member 32 are slidably fixed to the upper part 33a and lower part 33b of the housing 33 that forms the outer shell. The first and second floats 26 and 28 are fixed to the first and second shaft members 30 and 32 so as to be movable in the vertical direction, and the height positions of the first and second floats 26 and 28 can be adjusted.

[0050] The first shaft member 30 and the second shaft member 32 are provided with a first cam member 34 and a second cam member 36, respectively. The first and second cam members 34 and 36 are members that connect to the first and second shaft members 30 and 32, and connect or disconnect the first and second floats 26 and 28 and the second drain valve 10. The first and second cam members 34 and 36 each include first and second support shafts 34a and 36a that extend horizontally within the housing 33, first and second mounting portions 34b and 36b that extend to one side from the first and second support shafts 34a and 36a, and first and second engaging portions 34c and 36c that extend to the other side from the first and second support shafts 34a and 36a. The first and second support shafts 34a and 36a are rotatably fixed to the side portion 33c of the housing 33. The first and second mounting portions 34b and 36b are connected to the first and second shaft members 30 and 32.

[0051] The first and second engaging portions 34c and 36c rotate in conjunction with the first and second floats 26 and 28 around the first and second support shafts 34a and 36a, and are configured to engage with or disengage from the first and second projections 10e and 10f provided on the valve stem 10c. When the first and second floats 26 and 28 are in their highest position, the first and second engaging portions 34c and 36c rotate around the first and second support shafts 34a and 36a to engage with the first and second projections 10e and 10f, and the first and second floats 26 and 28 are connected to the second drain valve 10. Furthermore, when the first and second floats 26 and 28 are in a position lower than their highest position, the first and second engaging portions 34c and 36c rotate in the opposite direction around the first and second support shafts 34a and 36a, so as not to engage with the first and second projections 10e and 10f, and the connection between the first and second floats 26 and 28 and the second drain valve 10 is released.

[0052] In the case of a small flush, the regulating mechanism 22 restricts the rise of the first float 26, and the first cam member 34 is kept disengaged regardless of the water level of the flushing water. As a result, the second drain valve 10 is held in place by the second float 28, and the amount of flushing water for a small flush is supplied to the toilet bowl body 2. In the case of a large flush, the restriction on the rise of the first float 26 by the regulating mechanism 22 is released, and the first cam member 34 is kept engaged. As a result, the second drain valve 10 is held in place by the first float 26, and a larger amount of flushing water than that for a small flush is supplied to the toilet bowl body 2.

[0053] Next, the configuration of the hydraulic drive mechanism 18 will be described with reference to Figure 6. Figure 6 is a schematic cross-sectional view of the hydraulic drive mechanism of a cleaning water tank device according to an embodiment of the present invention. In Figure 6, the flow of cleaning water is illustrated by arrows. The hydraulic drive mechanism 18 is configured to drive the second drain valve 10 using the water supply pressure of the cleaning water supplied from the water supply to the cleaning water tank device 4. Specifically, the hydraulic drive mechanism 18 includes a cylinder 18a into which cleaning water supplied from the water supply valve 16 flows, a piston 18b slidably disposed within the cylinder 18a, and a rod 18c protruding from the lower end of the cylinder 18a to drive the second drain valve 10. Furthermore, a spring 18d is placed inside the cylinder 18a to bias the piston 18b downward, and a packing 18e is attached to the piston 18b to ensure watertightness between the inner wall surface of the cylinder 18a and the piston 18b. In addition, a clutch mechanism 24 is provided at the lower end of the rod 18c, and this clutch mechanism 24 is configured to connect or disconnect the rod 18c and the valve stem 10c of the second drain valve 10.

[0054] The cylinder 18a is a cylindrical component with its axis oriented vertically, and a piston 18b is slidably housed inside. An outlet pipe 16c extending from a water supply valve 16 is connected to the lower end of the cylinder 18a, allowing cleaning water flowing out of the water supply valve 16 to enter the cylinder 18a. As a result, the piston 18b inside the cylinder 18a is pushed up against the biasing force of the spring 18d by the cleaning water flowing into the cylinder 18a.

[0055] On the other hand, an outlet hole 18f is provided at the upper end of the cylinder 18a. Therefore, when cleaning water flows into the cylinder 18a from the outlet pipe 16c connected to the lower end of the cylinder 18a, the piston 18b is pushed upward from the bottom of the cylinder 18a. When the piston 18b is pushed up to its uppermost position, the cleaning water from the outlet pipe 16c flows into the cylinder 18a through the communication hole 18h formed in the rod 18c. The cleaning water that has flowed into the cylinder 18a flows out from the outlet hole 18f formed at the upper end of the cylinder 18a, and the cleaning water that has flowed out from the outlet hole 18f falls along the outer surface of the cylinder 18a and flows into the inner tank 14.

[0056] The rod 18c is a rod-shaped member connected to the lower surface of the piston 18b, and extends downward from inside the cylinder 18a through a through hole 18g formed in the bottom surface of the cylinder 18a. The valve stem 10c of the second drain valve 10 is connected to the lower end of the rod 18c via a clutch mechanism 24, and the rod 18c connects the piston 18b and the second drain valve 10. Therefore, when water flows into the cylinder 18a and pushes the piston 18b upward, the rod 18c connected to the piston 18b lifts the second drain valve 10 upward, and the second drain valve 10 opens.

[0057] Furthermore, the clutch mechanism 24 detachably connects the rod 18c and the second drain valve 10. When the second drain valve 10 is lifted a predetermined distance together with the rod 18c, the clutch mechanism 24 is configured to disconnect the valve stem 10c of the second drain valve 10 from the rod 18c. When the clutch mechanism 24 is disconnected, the second drain valve 10 is no longer linked to the movement of the piston 18b and the rod 18c, and the second drain valve 10 descends by its own weight.

[0058] Next, the configuration of the water weight member 40 (load-applying means) will be described in detail with reference to Figures 7 to 10. Figure 7 is a perspective view of the first drain valve of a washing water tank device according to an embodiment of the present invention, Figure 8 is an exploded perspective view of the first drain valve of a washing water tank device according to an embodiment of the present invention, Figure 9 is a top view of the first drain valve of a washing water tank device according to an embodiment of the present invention, and Figure 10 is a cross-sectional view taken along line XX in Figure 9.

[0059] As shown in Figures 7 and 9, the inner tank 14 has a roughly circular cutout 14c when viewed from above. This cutout 14c is formed in a larger circle than the first drain valve 8, the float 38, and the water weight member 40, and the first drain valve 8, the float 38, and the water weight member 40 are arranged within the cutout 14c. The float 38 and the water weight member 40 are attached to the valve stem 8c of the first drain valve 8, with the water weight member 40 positioned above the float 38.

[0060] A concave opening 14d, which is open at the top, is formed at the upper edge of the notch 14c of the inner tank 14. The opening 14d is formed in a horizontally elongated, flattened shape, and two are provided on both the left and right sides of the notch 14c. In a top view, the opening 14d is located near the water weight member 40. In this embodiment, the opening 14d is formed in a concave shape, but it is not limited to this, and may be formed in a hole shape.

[0061] As shown in Figures 8 to 10, the storage portion 40a of the water weight member 40 is formed by a cylinder with a portion cut out. The storage portion 40a includes a bottom wall 40d and a side wall 40e extending upward from the outer peripheral edge of the bottom wall 40d. A substantially circular drain hole 40b is formed in the bottom wall 40d near the center in the left-right direction. The size of the drain hole 40b is set such that the cleaning water in the storage portion 40a is discharged in accordance with the decrease in the water level in the outer tank 12. In other words, the predetermined flow rate of cleaning water discharged from the drain hole 40b is set such that the water level in the storage portion 40a decreases together with the water level in the outer tank 12.

[0062] As shown in Figure 10, the bottom wall 40d of the storage section 40a is inclined downward toward the drain hole 40b. Specifically, the bottom wall 40d is inclined downward toward the drain hole 40b from both the left and right ends. This allows the wash water stored in the storage section 40a to flow smoothly toward the drain hole 40b.

[0063] Next, the operation of the first drain valve and the function of the water weight member will be explained with reference to Figures 11A to 11F. Figures 11A to 11F are schematic diagrams illustrating the operation of the first drain valve of a washing water tank device according to an embodiment of the present invention. First, as shown in Figure 11A, in the standby state (before toilet flushing begins), flushing water is stored in the outer tank 12 and inner tank 14 up to the shut-off water level WL0. When the user rotates the lever handle 4a to start flushing the toilet, the first drain valve 8 is pulled up by the wire 20a, and the flushing water stored in the outer tank 12 is discharged from the first drain port 12a.

[0064] Next, as shown in Figure 11B, the water level WL1 of the flushing water in the outer tank 12 decreases. At this time, the flushing water stored in the storage section 40a of the water weight member 40 is discharged from the drain hole 40b at a predetermined flow rate. Here, the predetermined flow rate of the flushing water discharged from the drain hole 40b is set to such an extent that the water level in the storage section 40a decreases together with the water level in the outer tank 12. As a result, the flushing water in the storage section 40a is discharged from the drain hole 40b in accordance with the decrease in the water level WL1 of the flushing water in the outer tank 12. Therefore, while flushing water is being supplied from the outer tank 12 to the toilet bowl body 2, the water weight member 40 does not apply any load to the first drain valve 8 as a water weight, and the first drain valve 8 descends due to the buoyancy of the float 38 in accordance with the decrease in the water level WL1 of the flushing water in the outer tank 12.

[0065] Furthermore, when the water level WL1 of the flushing water in the outer tank 12 decreases, the float 16d of the water supply valve 16 descends, and the water supply valve 16 opens. When the water supply valve 16 opens, the flushing water that flows in from the inlet pipe 16b is supplied to the hydraulic drive mechanism 18 via the outlet pipe 16c. As a result, the piston 18b of the hydraulic drive mechanism 18 is pushed up, the second drain valve 10 is pulled up via the rod 18c, the flushing water in the inner tank 14 is discharged from the drain port 14a to the toilet bowl body 2, and the water level WL2 of the flushing water in the inner tank 14 decreases.

[0066] Next, as shown in Figure 11C, when the first drain valve 8 seats on the valve seat 8a and closes, the flushing water in the outer tank 12 reaches the dead water level WL3. Also, when the second drain valve 10 seats on the valve seat 10a and closes, the flushing water in the inner tank 14 reaches the dead water level WL4. This ends the supply of flushing water from the outer tank 12 and the inner tank 14 to the toilet bowl body 2.

[0067] Next, as shown in Figure 11D, the water level of the cleaning water in the outer tank 12 decreases, so the water supply valve 16 remains open, and water continues to be supplied to the inner tank 14 from the outlet hole 18f of the hydraulic drive mechanism. With the second drain valve 10 closed, the water level WL5 in the inner tank 14 rises as the cleaning water flows into the inner tank 14.

[0068] Next, as shown in Figure 11E, when the water level WL6 of the cleaning water in the inner tank 14 reaches the opening 14d of the inner tank 14, some of the cleaning water in the inner tank 14 flows into the outer tank 12 through the opening 14d, and the cleaning water flows into the outer tank 12 over the entire circumference of the upper edge of the inner tank 14.

[0069] Furthermore, most of the cleaning water flowing into the outer tank 12 from the opening 14d of the inner tank 14 flows toward the storage section 40a of the water weight member 40. Here, the flow rate of cleaning water flowing into the storage section 40a is greater than the predetermined flow rate of cleaning water discharged from the drain hole 40b. As a result, cleaning water is stored in the storage section 40a, and the water level WL7 of the cleaning water in the storage section 40a rises. This causes the cleaning water stored in the storage section 40a to apply a load to the first drain valve 8, so that even if the first drain valve 8 is opened while cleaning water is being supplied to the outer tank 12, the first drain valve 8 can be closed. The water level WL8 of the cleaning water in the outer tank 12 gradually rises.

[0070] Next, as shown in Figure 11F, when more flushing water flows from the inner tank 14 into the outer tank 12, the flushing water in the storage section 40a reaches the full water level WL9, and the flushing water overflowing from the storage section 40a flows into the outer tank 12. The water level of the flushing water in the outer tank 12 rises further to WL10. When the water level in the outer tank 12 rises to the shut-off water level WL0, the float 16d of the water supply valve 16 rises, and the water supply valve 16 is closed. This returns the system to the standby state (Figure 11A), and the toilet flushing process ends.

[0071] According to the cleaning water tank device 4 of the embodiment of the present invention, a load-applying means (water weight member 40) is provided to apply a load to the first drain valve 8 while cleaning water is being supplied to the outer tank 12. As a result, cleaning water is continuously discharged from the outer tank 12 for a long period of time, preventing the generation of wasted water.

[0072] Furthermore, according to the washing water tank device 4 of this embodiment, the load-applying means is a water weight member 40 in which washing water is stored, so with a simple configuration, washing water can be continuously discharged from the outer tank 12 for a long period of time, preventing the generation of wasted water.

[0073] In the flushing water tank device 4 of this embodiment, while flushing water is being supplied from the outer tank 12 to the toilet bowl body 2, the flushing water in the storage section 40a is configured to be discharged from the drain hole 40b in accordance with the decrease in the water level in the outer tank 12. Therefore, the first drain valve 8 can be opened without applying any load to it. On the other hand, while flushing water is being supplied to the outer tank 12, the flushing water is configured to flow into and be stored in the storage section 40a. Therefore, the first drain valve 8 can be closed by applying a load to it.

[0074] Furthermore, according to the cleaning water tank device 4 of this embodiment, the drain hole 40b is formed in the bottom wall 40d of the water weight member 40, and the bottom wall 40d of the water weight member 40 is inclined downward toward the drain hole 40b. Therefore, the cleaning water in the storage section 40a can flow toward the drain hole 40b, and the cleaning water in the storage section 40a can be discharged from the drain hole 40b in accordance with the decrease in the water level in the outer tank 12.

[0075] According to the flushing water tank device 4 of this embodiment, the first drain valve 8 includes a first drain valve 8 that supplies or stops flushing water to the toilet bowl body 2 by opening and closing a first drain port 12a formed in the outer tank 12, and a second drain valve 10 that supplies or stops flushing water to the toilet bowl body 2 by opening and closing a drain port 14a formed in the inner tank 14. Since the water weight member 40 is provided on the first drain valve 8, a load can be applied to the first drain valve 8 while flushing water is being supplied to the outer tank 12, causing the first drain valve 8 to close.

[0076] Furthermore, according to the cleaning water tank device 4 of this embodiment, the device comprises an outer tank 12 equipped with a first drain valve 8, and an inner tank 14 disposed inside the outer tank 12 and equipped with a second drain valve 10. The cleaning water overflowing from the inner tank 14 flows into the outer tank 12 and into the water weight member 40. Therefore, the cleaning water stored in the inner tank 14 can be used to store cleaning water in the water weight member 40.

[0077] According to the cleaning water tank device 4 of this embodiment, an opening 14d is formed at the upper edge of the inner tank 14 to allow cleaning water overflowing from the inner tank 14 to flow into the water weight member 40. Therefore, the flow rate of cleaning water flowing into the water weight member 40 can be adjusted by the opening 14d.

[0078] According to this embodiment of the flush toilet device 1, it is possible to provide a flush toilet device 1 equipped with a flush water tank device that can prevent the generation of wasted water by allowing flush water to be continuously discharged from the outer tank 12 for a long period of time.

[0079] Although embodiments of the present invention have been described above, various modifications can be made to the embodiments described above. [Explanation of Symbols]

[0080] 1: Flush toilet device 2: Toilet bowl 4: Washing water tank device 8: First drain valve 10: Second drain valve 12: Outer Tank 12a: 1st drain port 12b: 2nd drain 14: Inner Tank 14a: Drain port 14d:Aperture 16: Water supply valve 40: Water weight member 40a: Storage section 40b: Drain hole 40d: bottom wall 40e: Side wall

Claims

1. A flushing water tank device that is attached to the toilet bowl body and used to supply flushing water, A storage tank for storing flushing water to be supplied to the toilet bowl body, A water supply valve that supplies cleaning water into this storage tank, A drain valve that opens and closes a drain port provided in the above-mentioned storage tank to supply the flushing water in the storage tank to the toilet bowl body, An operating unit for driving the above-mentioned drain valve, It has, A washing water tank device characterized by having a load-applying means that applies a load to the drain valve while washing water is being supplied to the above-mentioned storage tank.

2. The washing water tank device according to claim 1, wherein the load-applying means is a water weight member in which washing water is stored.

3. The water weight member described above comprises a storage section for storing cleaning water, and a drain hole formed in the storage section for discharging the cleaning water stored in the storage section. While flushing water is being supplied from the storage tank to the toilet bowl, the flushing water in the storage section is discharged from the drain hole in accordance with the decrease in the water level in the storage tank. The cleaning water tank device according to claim 2, wherein the device is configured such that cleaning water flows into and is stored in the storage section while cleaning water is being supplied to the storage tank.

4. The drainage hole is formed in the bottom wall of the water weight member. The washing water tank device according to claim 3, wherein the bottom wall of the water weight member is inclined downward toward the drain hole.

5. The drain valve comprises a first drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a first drain port formed in the storage tank, and a second drain valve that supplies or stops flushing water to the toilet bowl body by opening and closing a second drain port formed in the storage tank. The washing water tank device according to claim 2, wherein the water weight member is provided in the first drain valve.

6. The above-mentioned storage tank comprises an outer tank on which the first drain valve is provided, and an inner tank located inside the outer tank on which the second drain valve is provided. The cleaning water tank device according to claim 5, wherein the cleaning water overflowing from the inner tank flows into the outer tank and also into the water weight member.

7. The cleaning water tank device according to claim 6, wherein an opening is formed at the upper edge of the inner tank to allow cleaning water overflowing from the inner tank to flow into the water weight member.

8. A flush toilet device equipped with a flushing water tank device according to any one of claims 1 to 7.

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