JP2013096187A - Makeup water supply device, washing water tank device equipped therewith, and flush toilet bowl to which the washing water tank device is applied - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a makeup water supply device for achieving water saving without producing wasteful water while preventing the supply of makeup water from an overflow pipe to a toilet bowl right after starting washing.SOLUTION: A makeup water supply device 19 is provided in a washing water tank device 16 which washes the toilet bowl, for supplying makeup water to the toilet bowl. It includes a makeup water flow path part 28 branching from a water service installation 22 and having a water discharge port 62a formed at the end on the downstream side and directed to an opening 52a of an overflow pipe 52 for supplying the makeup water to the overflow pipe 52, a water reservoir part 60 provided in the makeup water flow path part 28 for reserving the predetermined capacity of makeup water, and an opening/closing valve 82 which opens/closes an opening 72c formed in the water reservoir part 60 and being capable of letting the makeup water in the water reservoir 60 to a washing water tank 18, in linkage with a water level in the washing water tank 18.

Description

  The present invention relates to a makeup water supply device, a tank device provided with the makeup water supply device, and a flush toilet equipped with the washing water tank device, and more particularly, a makeup water supply device for supplying makeup water to a toilet bowl, The present invention relates to a tank device provided with the makeup water supply device and a flush toilet equipped with the wash water tank device.

Conventionally, in flush toilets that perform toilet flushing with two different washing water amounts, large and small, the makeup water supply device that supplies makeup water to the toilet is different for large and small washings (refill water volume) Therefore, it is known that the amount of replenishment water of the different difference spills down to the downstream of the drain trap of the toilet and wastes the wasted water (generates waste water).
As shown in Patent Document 1, in order to prevent such waste of washing water, washing water is introduced when the water level in the washing water tank reaches a predetermined level. , A float that is located in the cage and interlocks with the vertical movement of the water level in the cage, and a switching valve that switches between supplying makeup water and supplying water to the wash water tank in conjunction with the vertical movement of the float When the water level reaches the predetermined wash water tank level, the wash water flows into the tub and the float rises, and the supply of makeup water into the overflow pipe is started. A makeup water supply device to be completed is known.

US Patent Publication 2011/0056009

  However, in the makeup water supply apparatus shown in Patent Document 1 described above, makeup water is supplied to the overflow pipe immediately after the start of cleaning until the float is lowered to a predetermined height in conjunction with the water level in the basket. Is supplied to the toilet bowl, there is a problem (defect) in that the amount of supply water supplied becomes waste water. With the recent demand for water saving, it has become important to solve the problem of generating waste water as the amount of flushing water in the toilet bowl is reduced.

  Therefore, the present invention has been made to solve the drawbacks of the prior art, preventing the supply of makeup water from the overflow pipe to the toilet immediately after the start of washing, without generating waste water, An object of the present invention is to provide a makeup water supply device capable of achieving water saving.

In order to achieve the above object, the present invention provides a water supply device for supplying cleaning water for cleaning a toilet from a water source into a cleaning water tank, and a drain flow disposed on the bottom surface of the cleaning water tank and communicating with the toilet. A drainage valve that opens and closes the channel and communicates with the drainage channel and is provided to extend upward from the bottom surface of the washing water tank. When the washing water in the washing water tank exceeds the full water level, the washing water is discharged to the toilet. A replenishment water supply device that is provided in a flush water tank device that supplies replenishment water to a toilet bowl, and a water outlet that branches off from the water supply device and that is formed at its downstream end is an overflow tube A replenishment water flow path section that is directed to the opening of the replenishment water to supply replenishment water from the water outlet to the overflow pipe, a water storage section that is provided in the replenishment water flow path section and that can store a predetermined volume of replenishment water, and a water storage section Formed water reservoir It is characterized by having a opening and closing valve which opens and closes in conjunction with the water level in the washing water tank outlet can open the flushing water tank replenishment water.
In the present invention configured as described above, immediately after the drainage valve opens the drainage flow path and the cleaning water in the cleaning water tank is supplied to the toilet, the opening of the water storage section is in the cleaning water tank. It is in a state closed by an on-off valve that is linked to the water level, and when the makeup water branched from the water supply device and supplied to the makeup water flow path section is supplied into the water storage section provided in the makeup water flow path section, a predetermined A large amount of makeup water can be stored and retained in the reservoir. Therefore, while the makeup water is retained in the water storage section, the makeup water in the makeup water flow path section can be prevented from being discharged as makeup water from the spout to the opening of the overflow pipe. Can be prevented, and water saving can be achieved.
In addition, the drain valve closed the drainage channel after each of the large washing and the small washing, the washing water level in the washing water tank rose to a predetermined water level, and the opening of the water storage part was closed by the on-off valve. After that, the makeup water in the makeup water channel is directed from the spout to the opening of the overflow pipe only during the period from when the reservoir is filled with a predetermined volume of makeup water until the water level in the washing water tank reaches the full water level. Since the water is discharged as makeup water, a certain amount of makeup water can be supplied from the overflow pipe to the toilet.

In the present invention, preferably, the water storage unit is a water supply device until the opening / closing valve opens the opening of the water storage unit after the water supply device starts supplying water in a state where the opening / closing valve closes the opening of the water storage unit after the start of cleaning. A volume capable of storing all of the makeup water supplied from to the makeup water flow path section is provided.
In the present invention configured as described above, after the water supply device starts supplying water with the on-off valve closing the opening of the water storage section after the start of cleaning, the cleaning water in the cleaning water tank is drained and opened and closed. The reservoir has enough volume to store all the makeup water supplied from the water supply device to the makeup water flow path until the valve opens the reservoir opening in conjunction with the drop in the level of the washing water in the washing water tank. By providing, when the opening of the water storage section is opened by the on-off valve, the makeup water stored in the water storage section flows out from the opening to the washing water tank, so the makeup water in the makeup water flow path section is discharged from the spout It is possible to prevent water from being discharged as makeup water toward the opening of the overflow pipe. Therefore, generation of waste water can be completely eliminated and water saving can be achieved.

In the present invention, the volume of the water storage section that can store water is preferably 49 cc or more.
In the present invention configured as described above, since the water storage capacity of the water storage section is 49 cc or more, the water supply device starts water supply with the on-off valve closing the opening of the water storage section after the start of cleaning. After that, the wash water in the wash water tank is drained and supplied from the water supply device to the makeup water flow path until the opening / closing valve opens the opening of the reservoir in conjunction with the drop in the wash water level in the wash water tank. The water storage unit can store all makeup water. Therefore, generation of waste water can be completely eliminated and water saving can be achieved.

In the present invention, preferably, the water storage part includes an upper end part provided in the middle of the makeup water flow path part, and is formed to extend downward from the upper end part, and the upper end part of the water storage part is upstream of the water storage part. An inflow portion for supplying make-up water supplied from the make-up water flow channel portion on the side so as to remain within the volume of the water storage portion, and a volume of the water storage portion that is provided so as to be isolated from the flow path of the inflow portion. And an outflow part that allows the makeup water in the water storage part to flow out to the makeup water channel part on the downstream side only when in the state.
In the present invention configured as described above, the makeup water supplied from the water supply device to the makeup water flow path upstream of the water storage section after the start of washing is caused to flow into the water storage section by the inflow section at the upper end of the water storage section. It can be securely held in the department. In addition, after the makeup water in the upstream makeup water channel section flows into the reservoir section, the makeup water in the reservoir section flows from the outlet section to the downstream makeup water channel section until the volume of the reservoir section becomes full. It is possible to prevent the water from being discharged as make-up water from the water discharge port of the make-up water flow path portion downstream of the water storage portion toward the opening of the overflow pipe. Therefore, it is possible to prevent the generation of waste water and achieve water saving.

In the present invention, preferably, the water storage section is detachably attached to the makeup water flow path section so that it can be changed to another water storage section having a volume different from that volume.
In the present invention configured as above, the water storage section is detachably attached to the makeup water flow path section so that it can be changed to another water storage section having a volume different from the volume thereof. The volume of the section can be easily changed according to the use situation, and the amount of makeup water can be easily changed.

In the present invention, the open / close valve is preferably a float valve that moves up and down by buoyancy in conjunction with the water level in the wash water tank.
In the present invention configured as described above, since the on-off valve is a float valve that moves up and down by buoyancy in conjunction with the water level in the wash water tank, it is possible to prevent waste water from being generated with a simple structure. And water saving can be achieved.

In the present invention, preferably, a small hole is formed between the opening of the water storage section and the float valve that opens and closes the opening to communicate the water storage section and the washing water tank.
In the present invention configured as described above, the small reservoir formed between the opening of the water storage section and the float valve that opens and closes the opening is in a state where the water storage section is almost filled with makeup water after the cleaning is completed. Even if there is, the makeup water in the reservoir gradually flows out into the washing water tank little by little through the small hole, and the level of the makeup water in the reservoir decreases until it is almost the same as the washing water level in the washing water tank. Therefore, it is possible to prevent the makeup water in the makeup water flow path section from being discharged as makeup water from the water outlet toward the opening of the overflow pipe. Therefore, it is possible to prevent the generation of waste water and achieve water saving.

Moreover, this invention is a washing water tank apparatus provided with the said makeup water supply apparatus.
In the present invention configured as described above, it is possible to provide a washing water tank apparatus that can prevent generation of waste water and can achieve water saving.

Moreover, this invention is the flush toilet provided with the said washing water tank apparatus.
In the present invention configured as above, it is possible to provide a flush toilet that can prevent generation of waste water and can achieve water saving.

  According to the makeup water supply apparatus of the present invention, it is possible to prevent the makeup water from being supplied from the overflow pipe to the toilet immediately after the start of washing, and to save water without generating waste water.

1 is a perspective view showing a state where a toilet seat and a toilet lid are removed in a flush toilet to which a flush water tank apparatus including a makeup water supply apparatus according to an embodiment of the present invention is applied. It is the perspective view which looked at the internal structure of the washing water tank apparatus provided with the make-up water supply apparatus by one Embodiment of this invention from the front diagonally upper direction in the state which removed the cover body. It is the fragmentary sectional front view which partly fractured | ruptured a part of makeup water supply apparatus by one Embodiment of this invention. 1 is an exploded perspective view of a makeup water supply device according to an embodiment of the present invention. FIG. 3 is a partial front cross-sectional view in which a makeup water supply device is partially broken in a washing water tank device showing a state before drainage in the large washing mode of the makeup water supply device according to an embodiment of the present invention is started. FIG. 3 is a partial front cross-sectional view in which a makeup water supply device is partially broken in a washing water tank device showing a state immediately after drainage in a large cleaning mode of a makeup water supply device according to an embodiment of the present invention is started. In the cleaning water tank apparatus showing a state in which the level of the cleaning water in the cleaning water tank during drainage in the large cleaning mode of the makeup water supply apparatus according to an embodiment of the present invention has dropped to the water level WL3 with time, the makeup water supply apparatus It is the fragmentary front sectional view which fractured | ruptured partially. FIG. 3 is a partial front cross-sectional view in which the makeup water supply device is partially broken in the washing water tank device showing a state immediately after the end of drainage in the large cleaning mode of the makeup water supply device according to one embodiment of the present invention. In the cleaning water tank apparatus showing a state in which the level of the cleaning water in the cleaning water tank rises to the water level WL7 with time after the drainage in the large cleaning mode of the makeup water supply apparatus according to an embodiment of the present invention is completed. It is the partial front sectional view which fractured | ruptured the make-up water supply apparatus partially. In the cleaning water tank apparatus showing a state where the water level of the cleaning water in the cleaning water tank rises to the water level WL8 with time after the drainage in the large cleaning mode of the makeup water supply apparatus according to one embodiment of the present invention. It is the partial front sectional view which fractured | ruptured the make-up water supply apparatus partially. In the washing water tank apparatus which shows the state where fixed time passed after the water supply in the large washing mode of the makeup water supply apparatus by one embodiment of the present invention was completed, it is a partial front sectional view which partially fractured the makeup water supply apparatus is there. It is the partial front sectional view which fractured | ruptured the make-up water supply apparatus partially in the wash water tank apparatus which shows the state before the drainage in the small washing mode of the make-up water supply apparatus by one Embodiment of this invention is started. FIG. 3 is a partial front cross-sectional view in which a makeup water supply device is partially broken in a washing water tank device showing a state immediately after drainage in a small cleaning mode of a makeup water supply device according to an embodiment of the present invention is started. In the cleaning water tank apparatus showing a state in which the level of the cleaning water in the cleaning water tank during drainage in the small cleaning mode of the makeup water supply apparatus according to an embodiment of the present invention has dropped to the water level WL3 with time, the makeup water supply apparatus It is the fragmentary front sectional view which fractured | ruptured partially. FIG. 3 is a partial front cross-sectional view in which the makeup water supply device is partially broken in the washing water tank device showing a state immediately after the end of drainage in the small cleaning mode of the makeup water supply device according to one embodiment of the present invention. In the cleaning water tank apparatus showing a state in which the water level of the cleaning water in the cleaning water tank rises to the water level WL7 with time after the drainage in the small cleaning mode of the makeup water supply apparatus according to an embodiment of the present invention is completed. It is the partial front sectional view which fractured | ruptured the make-up water supply apparatus partially. In the washing water tank apparatus which shows the state where the level of the washing water in the washing water tank rises to the water level WL8 with time after the drainage in the small washing mode of the makeup water supply apparatus according to one embodiment of the present invention. It is the partial front sectional view which fractured | ruptured the make-up water supply apparatus partially. In the washing water tank apparatus which shows the state where fixed time passed after the water supply in the small washing mode of the makeup water supply apparatus by one embodiment of the present invention was completed, it is the fragmentary front sectional view which partly fractured the makeup water supply apparatus is there.

Next, a supplementary water supply device according to an embodiment of the present invention, a flush water tank device provided with the supplementary water supply device, and a flush toilet equipped with the flush water tank device will be described with reference to the accompanying drawings.
First, referring to FIG. 1, a flush toilet to which a flush water tank apparatus equipped with a makeup water supply apparatus according to an embodiment of the present invention is applied will be described.
FIG. 1 is a perspective view showing a state in which a toilet seat and a toilet lid are removed in a flush toilet to which a flush water tank apparatus including a makeup water supply apparatus according to an embodiment of the present invention is applied.

As shown in FIG. 1, reference numeral 1 is a so-called siphon type flush toilet that sucks filth in the bowl portion using a siphon action and discharges it from the drain trap pipe to the outside at once. This flush toilet 1 includes a toilet bowl body 2 made of earthenware. A bowl section 4 and a trap pipe 6 communicating with a lower portion of the bowl section 4 are formed in the toilet bowl body 2.
On the upper edge of the bowl portion 4 of the toilet body 2, flush water supplied from a rim 8 overhanging on the inside and a drainage channel 9 (see FIG. 3) formed inside the toilet body 2 on the rear side. The first water outlet 10 for discharging water is formed, and the wash water discharged from the first water outlet 10 descends while swirling to wash the bowl portion 4.

Below the bowl portion 4, a water storage portion 12 whose water storage surface is indicated by a chain line W ₀ is formed. An inlet 6a of a drain trap pipe 6 is opened below the water reservoir 12, and a drain trap pipe 6 behind the inlet 6a is connected to a drain pipe (not shown) through a drain socket (not shown). (Not shown).
In addition, a second water outlet for discharging washing water supplied from a drainage channel 9 (see FIG. 3) formed inside the toilet body 2 at the rear side of the toilet body 2 is located above the pool surface W ₀ of the bowl portion 4. 14 is formed, and the wash water discharged from the second water discharge port 14 generates a swirl flow that swirls the accumulated water in the accumulated water portion 12 in the vertical direction.

A flush water tank device 16 for storing flush water to be supplied to the toilet body 2 is provided on the upper surface on the rear side of the toilet body 2, and a lid that covers the flush water tank device is provided above the flush water tank device 16. A body 17 is provided.
In the washing water tank device 16 according to the present embodiment, an example applied to the siphon type flush toilet described above will be described. However, the present invention is not limited to such a siphon type flush toilet, and the water in the bowl portion is not limited. The present invention can also be applied to other types of flush toilets such as a so-called flush toilet that flushes filth by flowing water due to a drop.

Next, the internal structure of the washing water tank device 16 will be described with reference to FIGS.
FIG. 2 is a perspective view of the internal structure of the washing water tank apparatus provided with the makeup water supply apparatus according to the embodiment of the present invention as viewed obliquely from above and in the state where the lid is removed, and FIG. It is the fragmentary sectional front view which fractured | ruptured a part of makeup water supply apparatus by one Embodiment.
As shown in FIGS. 2 and 3, the washing water tank device 16 includes a washing water tank 18 for storing washing water for washing the flush toilet 1, and the bottom of the washing water tank 18 has a toilet body 2. A drain port 20 that communicates with the drain channel 9 is formed, and the cleaning water in the cleaning water tank 18 is supplied to the drain channel 9 of the toilet body 2. The washing water tank 18 can use a washing water amount of 4.8 liters for large washing (3 liters for small washing) for washing, as used in a water-saving flush toilet. Depending on, the amount of wash water stored may be different.

As shown in FIGS. 2 and 3, in the cleaning water tank 18 of the cleaning water tank device 16, a makeup water supply device 19, a water supply device 22 for supplying the cleaning water into the cleaning water tank 18, and the cleaning water A drainage valve device 24 that opens the drainage port 20 for the washing water stored in the tank 18 to flow into the drainage flow path 9 of the toilet body 2, and the washing water in the washing water tank 18 attached to the drainage valve device 24 is full. An overflow pipe portion 26 is provided for allowing the flush water to overflow into the toilet body 2 via the drainage channel 9 when the water level is exceeded.
The replenishing water supply device 19, which will be described in detail later, is provided with a replenishing water flow path portion 28 that branches from the water supply device 22 and extends above the overflow pipe portion 26 to refill the toilet body 2 with replenishing water.

  The water supply device 22 is connected to an external water supply source (not shown) and extends upward from the bottom of the cleaning water tank 18, and is attached to the upper end of the water supply pipe 30 to supply water from the water supply pipe 30. A water supply valve 32 that switches between water discharge and stop water into the wash water tank 18, and a water supply valve float that moves up and down according to fluctuations in the water level in the wash water tank 18 and switches between water discharge and water stop by the water supply valve 32. 34. The washing water discharged from the water supply valve 32 has a substantially constant flow rate per unit time according to the water supply pressure from the water supply source.

  A water supply valve spout 36 is opened at the lower end on the outer peripheral side of the water supply pipe 30, and wash water from the water supply valve 32 is discharged from the water supply valve spout 36 into the wash water tank 18.

In the water supply device 22, when the cleaning water in the cleaning water tank 18 is drained to the toilet by the drain valve device 24, the water level of the cleaning water is lowered and the water supply valve float 34 is lowered. It opens, and water discharge from the water supply valve water discharge port 36 is started, and water discharge into the wash water tank 18 from a water supply source (not shown) outside the wash water tank device 16 is started.
Further, when water discharge continues and the water level in the wash water tank 18 rises, the water supply valve float 34 also rises, whereby the water supply valve 32 is closed and the water supply valve water discharge port 36 is stopped. Thereby, the water level of the wash water in the wash water tank 18 is maintained at the water stop water level when full.

The drain valve device 24 is attached to the bottom surface of the wash water tank 18 and has a drain port forming member 38 that forms a drain port 20 that communicates with the drain channel 9 of the toilet body 2, a valve body 40, and the valve body 40. A valve body holding member 42 to be held, a main shaft member 44 having a lower end portion attached to the valve body holding member 42 and extending in the vertical direction, and an upper end portion (not shown) of the main shaft member 44 are attached to the main shaft member 44. And an operation wire 46 for operating the valve opening operation of the valve body 40 by the pulling operation.
The drain port forming member 38 includes a valve seat 41 that is formed over the entire periphery along the upper edge of the drain port 20 and protrudes upward. The valve seat 41 and the valve body 40 come into contact with each other. 20 is closed.
One end of the operation wire 46 is attached to the upper end (not shown) of the main shaft member 44, and the other end is attached to a wire take-up device 48 attached to the inside of the cleaning water tank 18. The wire winding device 48 is connected to an operation lever 50 attached to the outside of the cleaning water tank 18, and the operation lever 50 is rotated in a direction to execute a predetermined cleaning mode of large cleaning or small cleaning. As a result, the wire take-up device 48 is operated in conjunction with the rotation of the operation lever 50, the operation wire 46 is taken up by the wire take-up device 48, and the operation wire 46 taken up takes up the drain valve device. The 24 main shaft members 44 are pulled up, and the valve body holding member 42 and the valve body 40 are raised together with the main shaft member 44.

The overflow pipe part 26 includes an overflow pipe 52 and an overflow pipe attachment part 54 to which the lower end of the overflow pipe 52 is attached. The overflow pipe attachment part 54 is located near the bottom surface 18a of the cleaning water tank 18 and is connected to the drain valve device 24. The drain outlet forming member 38 is connected to the outer periphery.
The overflow pipe 52 is provided substantially upright from the overflow pipe mounting portion 54, and an opening 52a that opens upward is formed in a circular shape at the upper end, and the overflow pipe 52 is formed at the lower end of the overflow pipe 52. It is provided so as to communicate with the drainage flow path 9 through the mounting portion 54 and the drainage port 20 inside the drainage port forming member 38.
The height of the opening of the overflow pipe 52 is set to a height higher than the water stop water level so as to prevent the washing water from overflowing from the washing water tank. Even if the wash water rises above the still water level (full water level) by this overflow pipe 52, the wash water overflows into the overflow pipe 52 from the opening 52 a, and the drainage flow path inside the drain port forming member 38. 9, the water is discharged from the first water outlet 10 into the bowl portion 4.

  In the present embodiment, as an example, the drain valve device will be described as a manual drain valve device in which the user operates the wire winding device 48 by directly rotating the operation lever 50. It is not limited to such a form, The push which has a valve body operating mechanism (not shown) which can operate the valve opening operation of the valve body 40 by a user pushing the operation button (not shown) provided in the tank. In addition, a driving means such as a motor for rotating the operation lever 50 is provided, and the operation button (not shown) or the human sensor (not shown) set outside is provided. You may make it the form of the drain valve apparatus which controls the operation | movement of a drive means automatically by a command signal.

Next, the makeup water flow path portion 28 of the makeup water supply device 19 will be described with reference to FIGS. 2 to 4.
FIG. 4 is an exploded perspective view of the makeup water channel section of the makeup water supply apparatus according to the embodiment of the present invention with the makeup water channel pipe removed.

  The makeup water channel section 28 is branched from the channel from the feed water valve 32 to the feed water valve outlet 36 and extends to above the opening 52 a of the overflow pipe 52, and the downstream side of the makeup water channel pipe 56. A water storage portion inlet pipe 58 extending from an upstream end portion detachably connected to the end portion to an inflow port 68b formed in an upper end surface 68a of an upper cylindrical portion 68 of the water storage portion 60, which will be described in detail later, A replenishment water passage extending from an outlet 68c formed in the upper end surface 68a of the upper cylinder portion 68 of the 60 and having a downstream end thereof located almost directly above the opening 52a of the overflow pipe 52 as a replenishment water passage outlet 62a. A water discharge pipe 62 and a fixing part 64 for fixing the water storage part 60 to the opening 52 a of the overflow pipe 52 are provided.

An upstream end of the makeup water flow channel pipe 56 is connected to the water supply valve 32, and a constant flow of makeup water is stably supplied from the water supply valve 32.
The water reservoir inlet pipe 58 is formed so as to always make the make-up water flow downward from the make-up water flow channel pipe 56 above the water reservoir 60 to the water reservoir 60 once in the water reservoir 60.
Here, the water storage section inlet pipe 58 is replenished by providing a water storage section 60 in the makeup water flow path pipe 56 and providing a partition wall 66 extending from the makeup water flow path pipe 56 above the water storage section 60 to the water storage section 60. It may be formed so that the water always flows from the makeup water flow path pipe 56 through the water storage section 60.

The water storage section 60 is provided in the middle of the makeup water flow path section 28 and is provided at the lower end of the water storage section inlet pipe 58 of the makeup water flow path section 28, and is sized to store a predetermined volume of makeup water.
The water storage section 60 forms an upper cylindrical portion 68 that forms an upper portion of a cylindrical body that is hollow inside, and a lower portion of the cylindrical body that is hollow inside. The lower cylinder part 72 which can be attached to the part 68 from the lower side and can form the water storage possible volume space 70 which can store makeup water between the upper cylinder part 68 is provided.
In a water-storable volume space 70 in the cylindrical body formed by the upper cylindrical body 68 and the lower cylindrical body 72 of the water storage section 60, a float valve 82 described later is opened after the water supply valve 32 starts water supply. By the time, it is formed in a size having a predetermined capacity of 49 cc or more so that all of the makeup water supplied from the makeup water channel pipe 56 can be stored.
The upper cylindrical portion 68 of the water reservoir 60 is formed with an inlet 68b through which the replenishing water flows from the water reservoir inlet pipe 58 at the upper end surface 68a. An outflow port 68c through which makeup water flows out to the makeup water passage water discharge pipe 62 is formed, and a screw receiving portion 68d is provided on the inner peripheral surface of the lower portion of the upper cylindrical portion 68 of the water storage portion 60. Since the inflow port 68b and the outflow port 68c formed on the upper end surface 68a of the upper cylindrical portion 68 of the water storage unit 60 both open vertically downward, make-up water flowing in from the inflow port 68b vertically downward is supplied. First, it flows down to the water reservoir and does not directly enter the outlet 68c.
The lower cylinder part 72 of the water storage part 60 is provided with a screw engaging part 72 a on the outer peripheral surface of the upper part, and this screw engaging part 72 a is a screw receiving part of the upper cylinder part 68 of the water storage part 60. The upper cylinder part 68 and the lower cylinder part 72 of the water storage part 60 are connected by rotationally engaging with 68d.
The lower cylinder part 72 of the water storage part 60 can be easily attached and detached by rotating the screw engaging part 72a, and the lower cylinder part 72 having a different size (shape) is connected to the upper cylinder part 68. By doing so, the water storage possible volume space 70 formed by the upper cylinder part 68 and the lower cylinder part 72 can be changed to a size having a predetermined capacity. Accordingly, it is possible to refill the toilet body 2 with a certain amount of makeup water corresponding to different types of makeup water required by different types of toilet bodies 2 and to prevent generation of waste water.

The fixed portion 64 of the makeup water flow path portion 28 includes a support shaft attachment portion 74 that extends horizontally from the upper cylindrical portion 68 of the water storage portion 60, a support shaft 76 attached to the support shaft attachment portion 74, and a support shaft attachment portion 74. A support shaft engaging portion 78 that engages with the support shaft 76, and an overflow pipe opening attaching portion 80 that is connected to the upper side surface of the support shaft engaging portion 78 and is attached to the opening 52 a at the upper end of the overflow pipe 52. ing.
The height of the upper cylindrical portion 68 connected to the support shaft mounting portion 74 can be set by setting the height of the support shaft 76 that engages with the support shaft mounting portion 74.
The support shaft engaging portion 78 is formed in a cylindrical shape smaller than the overflow tube opening attachment portion 80, and its own shaft center is located outside the overflow tube opening attachment portion 80. Further, the support shaft engaging portion 78 is rotationally engaged with the screw portion 76 a of the support shaft 76, and the support shaft 76 is moved up and down with respect to the support shaft engaging portion 78 by rotating the screw portion 76 a of the support shaft 76. Can be moved.
The overflow pipe opening attaching portion 80 substantially forms an overflow pipe inlet 80a at the upper end of the overflow pipe 52 into which wash water exceeding the full water level in the wash water tank 18 flows.
With the configuration as described above, the upper tubular portion 68 of the water storage portion 60 is attached to the support shaft attaching portion 74, the support shaft 76, the support shaft engaging portion 78, and the opening 52a at the upper end of the overflow tube 52. The position is fixed with respect to the overflow pipe 52 via the opening mounting portion 80.

The makeup water passage water discharge pipe 62 rises upward from an outlet 68 c formed on the upper end surface 68 a of the upper cylindrical portion 68 of the water storage section 60, is bent horizontally, and is almost directly above the opening 52 a of the overflow pipe 52. A replenishment water passage water discharge port 62a directed toward the opening 52a of the overflow pipe 52 is formed by being bent in the downward direction almost directly above the opening 52a of the overflow pipe 52.
Since the makeup water flow path water discharge pipe 62 is formed substantially integrally with the upper cylinder part 68 of the water storage part 60, the position is fixed with respect to the upper cylinder part 68. The position is fixed.

An opening 72c through which makeup water can flow into the cleaning water tank 18 is formed in the lower cylindrical body 72 of the water storage section 60 on the lower surface 72b, and the opening 72c is opened and closed in conjunction with the water level in the cleaning water tank 18. A float valve 82 is provided.
A float 84 that moves up and down in conjunction with the vertical movement of the water level in the wash water tank 18 is attached to the float valve 82, and the float 84 is attached to the lower part. And a lid valve body portion 86 that can be formed.
The lid valve body 86 is formed in a circular shape having a diameter larger than the diameter of the opening 72c, and an outer lid valve body 86a that covers the opening 72c from the outside of the opening 72c, and an upper surface of the lid valve body 86. The inner sliding portion 86b is inserted into the opening 72c and is slidable inside the opening 72c, and the inner side of the water storage portion of the opening 72c at the upper end of the inner sliding portion 86b. Four pawls 86c adapted to be hooked when moving toward the outside of the opening. Therefore, the lid valve body portion 86 is provided so as to be slidable in the vertical direction between the outer lid valve body 86a of the lid valve body portion 86 and the pawl 86c of the lid valve body portion 86.
When the outer lid valve body 86a of the lid valve body portion 86 of the float valve 82 is pushed up by the buoyancy of the float 84 and pressed against the opening 72c formed in the lower cylindrical body 72 of the water storage portion 60, the opening 72c When the outer lid valve body 86a of the lid valve body portion 86 of the float valve 82 is closed and descends with the float 84 losing buoyancy and leaves the opening 72c formed in the lower cylindrical body portion 72 of the water storage portion 60, The opening 72c is opened.
When the outer lid valve body 86a of the lid valve body portion 86 of the float valve 82 is pressed against the opening 72c formed in the lower cylindrical body portion 72 of the water storage portion 60 (the opening 72c is closed), A small hole (small gap) 88 is formed between the lid valve body 86a and the opening 72c.
Instead of the float valve 82 provided in the lower cylinder part 72 of the water storage part 60, another on-off valve that opens and closes by detecting the water level may be used.

Next, a makeup water supply device according to an embodiment of the present invention, a wash water tank device including the makeup water supply device, and an operation (action) of a flush toilet to which the wash water tank device is applied will be described. .
First, referring to FIGS. 5 (a) to 5 (g), two types are executed by a flush water tank apparatus provided with a makeup water supply apparatus according to an embodiment of the present invention and a flush toilet to which the flush water tank apparatus is applied. The large cleaning mode among the cleaning modes will be described.
FIG. 5 (a) is a partially broken view of a makeup water supply device in a washing water tank device showing a state before drainage and water supply in the large cleaning mode of the makeup water supply device according to an embodiment of the present invention are started. FIG. 5B is a partial front cross-sectional view, and FIG. 5B is a supply of makeup water in the cleaning water tank apparatus showing a state immediately after drainage in the large cleaning mode of the makeup water supply apparatus according to an embodiment of the present invention is started. FIG. 5C is a partial front sectional view of the apparatus partially broken, and FIG. 5C shows the level of the cleaning water in the cleaning water tank during drainage in the large cleaning mode of the makeup water supply apparatus according to the embodiment of the present invention. FIG. 5 is a partial front cross-sectional view in which a makeup water supply device is partially broken in a cleaning water tank device showing a state where the water level WL3 is lowered with time.
FIG. 5D is a partial cross-sectional view of the make-up water supply device partially broken in the wash water tank device showing a state immediately after the end of drainage in the large wash mode of the make-up water supply device according to an embodiment of the present invention. FIG. 5 (e) is a front view, and FIG. 5 (e) shows the water level of the cleaning water in the cleaning water tank after the drainage in the large cleaning mode of the makeup water supply apparatus according to the embodiment of the present invention. FIG. 5 (f) is a partial cross-sectional front view in which the makeup water supply device is partially broken in the cleaning water tank device showing a state where it has risen to WL7, and FIG. In the wash water tank apparatus showing a state where the water level of the wash water in the wash water tank rises to the water level WL8 with time after the drainage in the wash mode is finished, a part of the makeup water supply device partially broken FIG. 5G is a cross-sectional view of a makeup water supply device according to an embodiment of the present invention. It is the partial cross section front view which fractured | ruptured the supply apparatus partially.

  First, in the makeup water supply device 19 in a state before starting drainage and water supply in the large washing mode as shown in FIG. 5A, the valve body 40 of the drainage valve device 24 contacts the valve seat 41. Thus, the drain port 20 is closed, and the water level of the cleaning water in the cleaning water tank 18 is maintained at the substantially water stop level WL0 when the water is full. The level of the makeup water in the water storage section 60 of the makeup water flow path section 28 is maintained substantially at the water stop level WL0 when the wash water tank 18 is full, and above the water stop water level WL0 in the water storage section 60, A part of the predetermined volume of the volume space 70 capable of storing water remains in a state where water can be stored. The outer lid valve body 86 a of the lid valve body portion 86 of the float valve 82 of the water reservoir 60 has a lower cylindrical body 72 of the water reservoir 60 due to the buoyancy of the float 84 of the lid valve body 86 of the float valve 82 of the water reservoir 60. The opening 72c is pressed against the opening 72c, and the opening 72c is closed.

  Next, as shown in FIG. 5B, in the makeup water supply device 19 in a state immediately after the drainage in the large washing mode is started, the user performs the predetermined large washing mode by operating the operation lever 50. When the rotating operation is performed, the wire take-up device 48 is activated, the operation wire 46 is taken up by the take-up amount in the large cleaning mode, and the main shaft member 44, the valve body holding member 42 and the valve body 40 of the drain valve device 24 are moved. The drainage port 20 is opened with respect to the valve seat 41, and the washing water in the washing water tank 18 is discharged to the toilet body 2 through the drainage channel 9. After the valve body 40 opens the drain port 20, the water supply valve 32 of the water supply device 22 is opened, and at the same time, the cleaning water is discharged into the cleaning water tank 18 from the water supply valve outlet 36 of the water supply valve 32 and almost simultaneously. The makeup water supplied to the makeup water flow channel pipe 56 of the makeup water flow channel portion 28 branched from the water supply valve 32 passes through the water storage portion inlet pipe 58 of the makeup water flow channel portion 28 from the makeup water flow channel tube 56, and The water flows downward from the inflow port 68 b formed in the upper end surface 68 a of the upper cylindrical portion 68 into the water storage portion 60. The level of makeup water into the water storage unit 60 is gradually increased over time from the water stop water level WL0 at the start of cleaning, and then increased to the water level WL1. Above the water level WL <b> 1 in the water storage unit 60, a part of the predetermined volume of the volume space 70 capable of storing water remains in a state where water can be stored. At this time, the water level outside the water reservoir 60 in the wash water tank 18 is lowered to the water level WL2.

Next, as shown in FIG. 5C, in the makeup water supply device 19 in a state where the water level in the wash water tank during drainage in the large washing mode has dropped to the water level WL3 with time, the valve body 40 is drained. The cleaning water from the water supply valve spout 36 of the water supply valve 32 is discharged into the cleaning water tank 18 and the makeup water is stored from the makeup water channel pipe 56 branched from the water supply valve 32. It flows into the part 60. The water level in the water storage unit 60 is raised from the water level WL1 with time to the water level WL4. Above the water level WL4 in the water storage section 60, a part of the predetermined volume of the volume space 70 capable of storing water still remains in a state where water can be stored.
When the level of the cleaning water outside the water storage section 60 in the cleaning water tank 18 is lowered to the water level WL3, the float 84 starts to move in conjunction with the lowering of the water level in the cleaning water tank 18. The outer lid valve body 86a to which the water is attached starts to descend, leaves the opening 72c formed in the lower cylinder part 72 of the water storage part 60, and the replenishing water stored in the water storage part 60 passes through the opening 72c. The water is immediately discharged into the washing water tank 18, and the water level in the water storage unit 60 starts to rapidly decrease from the water level WL4. Therefore, before the water storage possible volume space 70 in the water storage unit 60 is filled with the replenishment water, the outflow of the replenishment water from the opening 72c formed in the lower cylinder part 72 of the water storage unit 60 is started.

Next, as shown in FIG. 5 (d), in the makeup water supply device 19 in the state immediately after the end of drainage in the large washing mode, the main shaft member 44 and the valve body 40 of the drainage valve device 24 are further lowered as the water level is lowered. Then, the valve body 40 comes into contact with the valve seat 41, the drain port 20 is closed, and the drainage in the large washing mode of the drain valve device 24 is finished.
On the other hand, the wash water discharged from the water supply valve outlet 36 of the water supply valve 32 of the water supply device 22 is continuously discharged into the wash water tank 18, and the supply water is stored from the supply water flow path pipe 56 branched from the water supply valve 32. The replenishing water that has flowed into the water storage portion 60 and flows into the water storage portion 60 flows out from the opening 72c formed in the lower cylindrical portion 72 of the water storage portion 60 into the wash water tank 18 outside the water storage portion 60, Water is stored in the washing water tank 18. The water level outside the water storage section 60 in the wash water tank 18 starts to rise again with time from the water stop water level WL5 after the descent is stopped at the water stop water level WL5.
The water level in the water storage unit 60 is set to a water level WL6 of almost zero height from the bottom of the water storage unit 60 because the makeup water in the water storage unit 60 flows into the washing water tank 18 from the opening 72c. In this state, the above-described volume space 70 capable of storing water of a predetermined capacity remains almost entirely.

Next, as shown in FIG. 5 (e), in the makeup water supply device 19 in a state where the water level in the washing water tank 18 has risen to the water level WL7 with time after the drainage in the large washing mode is finished. The valve body 40 remains in the state where the drain port 20 is closed, and the cleaning water from the water supply valve outlet 36 of the water supply valve 32 is continuously discharged into the cleaning water tank 18 and branched from the water supply valve 32. Make-up water flows from the pipe 56 into the water reservoir 60.
When the water level outside the water storage section 60 in the wash water tank 18 rises to the water level WL7, the float 84 rises in conjunction with the rise in the water level, so the outer lid valve body 86a to which the float 84 is attached has Ascending is started, and the replenishment water that is pressed out to the opening 72c formed in the lower cylindrical portion 72 of the water storage section 60 and flows out of the water storage section 60 from the opening 72c is closed. The makeup water flowing into the part 60 starts to be stored in the water storage part 60, and the water level in the water storage part 60 starts to rise from the water level WL6 at a substantially zero height from the bottom of the water storage part 60. As described above, the outer lid valve body 86a also functions as a switching valve body for switching the flow of the makeup water from the makeup water channel pipe 56 to the outside of the water storage section 60 or to store the water in the water storage section 60. In the water storage unit 60, a volume space 70 capable of storing water remains in a state in which water can be stored almost entirely.

Next, as shown in FIG. 5 (f), in the makeup water supply device 19 in a state where the water level in the cleaning water tank 18 has risen to the water level WL8 with time after the drainage in the large cleaning mode is finished. The valve body 40 remains in the state where the drain port 20 is closed, and the cleaning water from the water supply valve outlet 36 of the water supply valve 32 is continuously discharged into the cleaning water tank 18 and branched from the water supply valve 32. Make-up water flows from the pipe 56 into the water reservoir 60.
The outer lid valve body 86a of the lid valve body portion 86 of the float valve 82 is pressed against the opening 72c formed in the lower cylindrical body portion 72 of the water storage portion 60 by the buoyancy of the float 84, and the water storage portion 60 outward from the opening 72c. The supply water flowing out from the inlet 68b of the water storage unit 60 makes the water storage unit 60 full. Therefore, in the water storage section 60, there is no space left in the volume space 70 that can store water and in which makeup water can be stored.
In this state, the makeup water that flows into the water storage part 60 from the inlet 68b of the water storage part 60 cannot be stored in the water storage part 60, and is formed on the upper end surface 68a of the upper cylinder part 68 of the water storage part 60. The outlet water 68c is discharged upward from the outlet water 68c toward the makeup water passage water discharge pipe 62 of the makeup water passage section 28, and the makeup water passage water discharge pipe 62 of the makeup water passage water discharge pipe 62 disposed almost directly above the opening 52a of the overflow pipe 52. Water discharge is started from the water port 62 a toward the overflow pipe 52, the supply water discharged from the supply water flow path water discharge port 62 a flows into the overflow pipe 52, and the supply water passes through the overflow pipe 52 and the toilet body 2. Refilled.
The supply water discharged from the supply water channel discharge pipe 62 is supplied as a fixed amount of supply water in a fixed supply water discharge time until the water supply from the supply valve 32 is finished after the water storage section 60 is filled. The toilet body 2 is refilled. The time from when the opening 72c formed in the lower cylinder body 72 of the water storage section 60 is closed by the outer lid valve body 86a until the inside of the water storage section 60 becomes full is the water storage capacity space 70 of the water storage section 60. It can be changed by changing the size of.

Next, the makeup water supply device 19 in a state immediately after the water supply in the large washing mode is finished will be described.
In the makeup water supply device 19 in a state immediately after the water supply in the large cleaning mode is finished, the valve body 40 remains in the state where the drain port 20 is closed, and the water level in the cleaning water tank 18 rises to the water stop water level WL0. Then, the water supply valve float 34 is raised, whereby the water supply valve 32 is closed, the water supply valve outlet 36 is stopped, and the replenishment water flows into the water storage section 60 from the replenishment water passage pipe 56 branched from the water supply valve 32. And the outflow from the outlet 68c formed on the upper end surface 68a of the upper cylindrical portion 68 of the water storage section 60 to the makeup water flow path water discharge pipe 62 is also stopped, and the makeup water flow path discharge of the makeup water flow path water discharge pipe 62 is stopped. Water discharge from the water port 62a is also stopped. At this time, the inside of the water storage unit 60 is filled with make-up water and kept in a full water state.

Next, as shown in FIG. 5G, the makeup water supply device 19 in a state in which a certain time has elapsed after the water supply in the large cleaning mode is completed will be described.
Immediately after the water supply in the large washing mode is completed, the water storage section 60 is filled with makeup water and kept in a full water state.
At this time, the outer lid valve body 86a of the lid valve body portion 86 of the float valve 82 is pressed against the opening 72c formed in the lower cylindrical body portion 72 of the water storage portion 60 by the buoyancy of the float 84, and from the opening 72c. Although the outflow of make-up water is stopped, a small hole 88 is formed between the outer lid valve body 86a and the opening 72c, so that the make-up water in the water storage section 60 becomes small with time. A small amount is discharged from 88 into the wash water tank 18 outside the water reservoir 60. Therefore, the water level in the water storage unit 60 is lowered from the state in which the water storage unit 60 is filled with makeup water to the water level WL9, and finally the water level in the water storage unit 60 The water level is lowered to substantially the same water level WL0 as the water level in the washing water tank 18 outside the unit 60, and returns to the water level before the drainage in the large washing mode as shown in FIG.

Next, referring to FIGS. 6 (a) to 6 (g), a washing water tank apparatus provided with a makeup water supply device according to an embodiment of the present invention and a flush toilet that is applied to the washing water tank apparatus. The cleaning mode will be described.
FIG. 6A is a partially broken view of the makeup water supply device in the washing water tank device showing a state before drainage and water supply are started in the small cleaning mode of the makeup water supply device according to one embodiment of the present invention. FIG. 6B is a partial front cross-sectional view, and FIG. 6B is a supply of makeup water in the cleaning water tank apparatus showing a state immediately after drainage in the small cleaning mode of the makeup water supply apparatus according to one embodiment of the present invention is started. FIG. 6C is a partial front cross-sectional view of the apparatus partially broken, and FIG. 6C shows the level of the cleaning water in the cleaning water tank during drainage in the small cleaning mode of the makeup water supply apparatus according to the embodiment of the present invention. FIG. 3 is a partial cross-sectional front view in which a makeup water supply device is partially broken in a cleaning water tank device showing a state where the water level WL3 is lowered with time.
FIG. 6D is a partially front view of the makeup water supply device partially broken in the washing water tank device showing a state immediately after the end of drainage in the small washing mode of the makeup water supply device according to one embodiment of the present invention. FIG. 6E is a cross-sectional view, and FIG. 6E shows the water level of the cleaning water in the cleaning water tank during the water supply after the end of drainage in the small cleaning mode of the makeup water supply apparatus according to one embodiment of the present invention. FIG. 6 (f) is a partial front cross-sectional view of the cleaning water tank apparatus showing a state where it has been raised to WL7, and is a partially cutaway view of the makeup water supply apparatus. FIG. In the wash water tank apparatus showing a state where the water level of the wash water in the wash water tank rises to the water level WL8 with time after the drainage in the wash mode is finished, a part of the makeup water supply device partially broken FIG. 6 (g) is a front view of a makeup water tank device showing a state in which a fixed time has elapsed after the completion of water supply in the small cleaning mode of the makeup water supply device according to an embodiment of the present invention. It is the partial cross section front view which fractured | ruptured the supply apparatus partially.

  First, in the replenishment water supply apparatus in a state before the drainage in the small cleaning mode as shown in FIG. 6A is started, the same as in the case of the large cleaning mode shown in FIG. 5A described above. Therefore, the description is omitted.

  Next, as shown in FIG. 6B, in the makeup water supply device 19 in a state immediately after the drainage in the small cleaning mode is started, the user performs the operation lever 50 in a predetermined small cleaning mode. When the rotating operation is performed, the wire winding device 48 is actuated, the operation wire 46 is wound with the winding amount in the small cleaning mode, and the main shaft member 44, the valve body holding member 42 and the valve body 40 of the drainage valve device 24 are wound. The valve seat 41 is pulled up, the drain opening is opened, and the wash water in the wash water tank is discharged to the toilet main body through the drain passage. After the valve body 40 opens the drain port 20, the water supply valve 32 of the water supply device 22 is opened, and at the same time, the cleaning water is discharged into the cleaning water tank 18 from the water supply valve outlet 36 of the water supply valve 32 and almost simultaneously. The makeup water supplied to the makeup water channel pipe 56 branched from the water supply valve 32 is formed on the upper end surface 68 a of the upper cylinder body 68 of the reservoir 60 through the makeup water channel pipe 56 and the water reservoir inlet pipe 58. The water flows downward from the inlet 68b into the water reservoir 60 in the vertical direction. The water level in the water storage unit 60 is gradually increased with time from the water stop water level WL0 at the start of cleaning, and is increased to the water level WL1. Above the still water level WL <b> 1 in the water storage unit 60, a part of the volume space 70 capable of storing water of the predetermined capacity remains in a state where water can be stored. At this time, the water level outside the water reservoir 60 in the wash water tank 18 is lowered to the water level WL2.

Next, as shown in FIG. 6C, in the makeup water supply device 19 in a state where the water level in the wash water tank during drainage in the small washing mode is lowered to the water level WL3 with time, the valve body 40 is drained. The cleaning water from the water supply valve spout 36 of the water supply valve 32 is discharged into the cleaning water tank 18 and the makeup water is stored from the makeup water channel pipe 56 branched from the water supply valve 32. It flows into the part 60. The water level in the water storage unit 60 is increased with time from the water level WL1 to the water level WL4. Above the water level WL4 in the water storage section 60, a part of the predetermined volume of the volume space 70 capable of storing water still remains in a state where water can be stored.
When the level of the cleaning water outside the water storage section 60 in the cleaning water tank 18 is lowered to the water level WL3, the float 84 starts to move in conjunction with the lowering of the water level in the cleaning water tank 18. The valve body 86a starts to descend, moves away from the opening 72c formed in the lower cylinder part 72 of the water storage part 60, and the makeup water stored in the water storage part 60 is located outside the water storage part 60 from the opening 72c. The water is immediately discharged into the washing water tank 18, and the water level in the water storage unit 60 starts to rapidly decrease from the water level WL4. Therefore, before the water storage possible volume space 70 in the water storage unit 60 is filled with the replenishment water, the outflow of the replenishment water from the opening 72c formed in the lower cylinder part 72 of the water storage unit 60 is started.

Next, as shown in FIG. 6 (d), in the makeup water supply device 19 in the state immediately after the end of drainage in the small cleaning mode, the main shaft member 44 and the valve body 40 of the drainage valve device 24 are further lowered as the water level is lowered. Then, the valve body 40 comes into contact with the valve seat 41, the drain port 20 is closed, and the drainage in the small cleaning mode of the drain valve device 24 is finished.
On the other hand, the wash water discharged from the water supply valve outlet 36 of the water supply valve 32 of the water supply device 22 is continuously discharged into the wash water tank 18, and the supply water is stored from the supply water flow path pipe 56 branched from the water supply valve 32. The replenishing water that has flowed into the water storage portion 60 and flows into the water storage portion 60 flows out from the opening 72c formed in the lower cylinder portion 72 of the water storage portion into the wash water tank 18 outside the water storage portion 60. Water is stored in the washing water tank 18. The water level outside the water storage section 60 in the wash water tank 18 starts to rise again with time from the water stop water level WL10 after the descent is stopped at the water stop water level WL10.
The water level in the water storage unit 60 is set to a water level WL6 of almost zero height from the bottom of the water storage unit 60 because the makeup water in the water storage unit 60 flows into the washing water tank 18 from the opening 72c. In this state, the above-described volume space 70 capable of storing water of a predetermined capacity remains almost entirely.

Next, as shown in FIG. 6 (e), in the makeup water supply device 19 in a state where the water level in the cleaning water tank 18 has risen to the water level WL7 with time after the drainage in the small cleaning mode is completed. The valve body 40 remains in the state where the drain port 20 is closed, and the cleaning water from the water supply valve outlet 36 of the water supply valve 32 is continuously discharged into the cleaning water tank 18 and branched from the water supply valve 32. Make-up water flows from the pipe 56 into the water reservoir 60.
When the flush water level outside the water reservoir 60 in the flush water tank 18 rises to the water level WL7, the float 84 rises, so the outer lid valve body 86a starts to rise, and the lower side of the water reservoir 60 The makeup water that is pressed against the opening 72c formed in the cylindrical body portion 72 and flows out of the water storage section from the opening 72c is closed, and the makeup water flowing into the water storage section 60 from the inlet 68b of the water storage section 60 is Water storage in the water storage unit 60 starts to be started, and the water level in the water storage unit 60 starts to rise from the water level WL6 at a substantially zero height from the bottom surface of the water storage unit 60. Thus, in both the small washing mode and the large washing mode, the outer lid valve body 86a closes the opening 72c when the washing water level outside the water storage section 60 in the washing water tank 18 becomes the same water level. Then, the makeup water starts to be stored in the water storage unit 60. In the water storage unit 60, a volume space 70 capable of storing water remains in a state in which water can be stored almost entirely.

  The water level WL7 where the float 84 is raised in the small cleaning mode and the water level WL7 where the float 84 is raised in the large cleaning mode are common, and the makeup water supply device 19 in the subsequent state in the small cleaning mode is described above. This is the same as in the large cleaning mode shown in FIGS. 5 (f) and 5 (g).

Next, as shown in FIG. 6 (f), in the makeup water supply device 19 in a state where the water level in the cleaning water tank 18 rises to the water level WL 8 with time after the drainage in the small cleaning mode is finished. The valve body 40 remains in the state where the drain port 20 is closed, and the cleaning water from the water supply valve outlet 36 of the water supply valve 32 is continuously discharged into the cleaning water tank 18 and branched from the water supply valve 32. Make-up water flows from the pipe 56 into the water reservoir 60.
The outer lid valve body 86a is pressed against the opening 72c formed in the lower cylinder part 72 of the water storage part 60, and closes the makeup water flowing out of the water storage part 60 from the opening 72c. The makeup water flowing in from the inlet 68b of the water storage section 60 causes the water storage section 60 to be filled with water, and the water storage section 60 has a space in the volume space 70 that can store water that can store the makeup water. It has not been left.
In this state, the makeup water that flows into the water storage part 60 from the inlet 68b of the water storage part 60 cannot be stored in the water storage part 60, and is formed on the upper end surface 68a of the upper cylinder part 68 of the water storage part 60. From the outlet 68 c to the make-up water passage water discharge pipe 62, and from the make-up water passage water discharge outlet 62 a of the make-up water flow path water discharge pipe 62 to the overflow pipe 52, and make-up water flows into the overflow pipe 52. The toilet body 2 is refilled through the overflow pipe 52.
The supply water discharged from the supply water channel discharge pipe 62 is supplied as a fixed amount of supply water in a fixed supply water discharge time until the water supply from the supply valve 32 is finished after the water storage section 60 is filled. The toilet body 2 is refilled. The amount of makeup water is the amount of makeup water supplied from the makeup water flow pipe 56 until the water supply is stopped after the water storage section 60 is full. The amount of makeup water in the mode is the same.

Next, the makeup water supply device in a state immediately after the water supply in the small cleaning mode is finished will be described.
In the makeup water supply device 19 in a state immediately after the cleaning in the small cleaning mode is finished, the valve body 40 is in a state in which the drain port 20 is closed, and the water level in the cleaning water tank 18 rises to the stop water level WL0. Then, the water supply valve float 34 is raised, whereby the water supply valve 32 is closed, the water supply valve outlet 36 is stopped, and the replenishment water flows into the water storage section 60 from the replenishment water passage pipe 56 branched from the water supply valve 32. Is also stopped, the outflow from the outlet 68c formed in the upper end surface 68a of the upper cylindrical portion 68 of the water storage section 60 is also stopped, and the water discharge from the makeup water passage water outlet 62a of the makeup water passage water discharge pipe 62 is also stopped. It is in the state. At this time, the outer lid valve body 86a is in a state in which the outflow of makeup water from the opening 72c in the water reservoir 60 is stopped, and the water reservoir 60 is filled with makeup water and kept in a full water state. ing.

Next, as shown in FIG. 6G, the makeup water supply device 19 in a state in which a fixed time has elapsed after the water supply in the small cleaning mode is completed will be described.
Immediately after the water supply in the small cleaning mode is completed, the water reservoir 60 is filled with makeup water and kept in a full state.
At this time, the outer lid valve body 86a is in a state in which the outflow of makeup water from the opening 72c in the water reservoir 60 is stopped, but there is a small hole between the outer lid valve body 86a and the opening 72c. Since 88 is formed, the replenishing water in the water storage unit 60 is gradually discharged from the small hole 88 into the washing water tank 18 outside the water storage unit 60 with time. Therefore, the water level in the water storage unit 60 is lowered from the state in which the water storage unit 60 is filled with makeup water to the water level WL9, and finally the water level in the water storage unit 60 The water level is lowered to substantially the same water level WL0 as the water level in the washing water tank 18 outside the unit 60, and the water level returns to the state before the drainage in the small washing mode as shown in FIG.

Next, the effect of the makeup water supply apparatus according to the above-described embodiment of the present invention will be described.
First, the valve body 40 of the drain valve device 24 rises to open the drain port 20, and immediately after the start of cleaning in which the cleaning water in the cleaning water tank 18 is supplied from the drain channel 9 to the toilet, the opening of the water storage unit 60 is opened. 72c is a state closed by a float valve 82 interlocking with the water level in the wash water tank 18, and the makeup water branched from the water supply device 22 and supplied to the makeup water flow passage portion 28 of the makeup water supply device 19 is When supplied to the water storage section 60 provided in the makeup water flow path section 28, a predetermined volume of makeup water can be stored and retained in the water storage section 60. Accordingly, while the makeup water is retained in the water storage section 60, the makeup water in the makeup water flow path section 28 is discharged as makeup water from the makeup water flow path outlet 62a toward the opening 52a of the overflow pipe 52. Therefore, generation of waste water can be prevented, and water saving can be achieved.
Further, after each of the large cleaning and the small cleaning, the valve body 40 of the drain valve device 24 closes the drain port 20, and the level of the cleaning water in the cleaning water tank 18 rises to the predetermined water level WL7, After the opening 72c of the 60 is closed by the open / close valve 82, the period from when the reservoir 60 is filled with a predetermined volume of makeup water to when the water level WL8 of the cleaning water in the cleaning water tank 18 reaches the full water level WL0. As long as the makeup water in the makeup water flow path section 28 is discharged as makeup water from the makeup water flow path outlet 62 a toward the opening 52 a of the overflow pipe 52, a certain amount of makeup water is supplied from the overflow pipe 52 to the toilet body 2. can do.

  According to the makeup water supply device 19 according to the embodiment of the present invention, after the water supply device 22 starts supplying water with the float valve 82 closing the opening 72c of the water storage unit 60 after the start of cleaning, the cleaning water tank 18 is started. The flush water is drained and supplied from the water supply device 22 to the makeup water flow path section 28 until the float valve 82 opens the opening 72c of the water storage section 60 in conjunction with the lowering of the flush water level in the flush water tank 18. When the opening 72c of the water storage unit 60 is opened, the replenishment water stored in the water storage unit 60 is washed from the opening 72c. Since it flows out to the water tank 18, it is possible to prevent the makeup water in the makeup water flow path section 28 from being discharged as makeup water from the makeup water flow path outlet 62 a toward the opening 72 c of the overflow pipe 52. Therefore, generation of waste water can be completely eliminated and water saving can be achieved.

  Further, according to the makeup water supply device 19 according to the embodiment of the present invention, since the volume space 70 in which the water storage unit 60 can store water is 49 cc or more, the float valve 82 closes the opening 72c of the water storage unit 60 after the start of cleaning. After the water supply device 22 starts water supply in the state where the water is supplied, the cleaning water in the cleaning water tank 18 is drained from the drain port 20, and the float valve 82 is interlocked with the lowering of the level of the cleaning water in the cleaning water tank 18. Until the opening 72c of the water storage section 60 is opened, all of the makeup water supplied from the water supply device 22 to the makeup water flow path section 28 can be stored. Therefore, generation of waste water can be completely eliminated and water saving can be achieved.

  Further, according to the makeup water supply apparatus 19 according to the embodiment of the present invention, the makeup water supplied from the water supply apparatus 22 to the makeup water flow path section 28 on the upstream side of the water storage section 60 after the start of cleaning is supplied to the upper end surface 68a of the water storage section 60. It is possible to flow into the water storage unit 60 from the inflow port 68b of the water storage unit 60 and securely retain it in the water storage unit 60. Further, after the makeup water in the makeup water flow path section 28 on the upstream side of the water storage section 60 flows into the water storage section 60 through the water storage section inlet pipe 58, the water storage section 60 is filled until the volume space 70 of the water storage section 60 becomes full. The supply water is prevented from flowing out from the outlet 68 c to the downstream supply water passage water discharge pipe 62, and the opening of the overflow pipe 52 is opened from the supply water passage water discharge outlet 62 a of the supply water passage water discharge pipe 62 downstream of the water storage section 60. It is possible to prevent water from being discharged as makeup water toward 52a. Therefore, it is possible to prevent the generation of waste water and achieve water saving.

  Furthermore, according to the makeup water supply device 19 according to the embodiment of the present invention, the water storage unit 60 can be changed to another water storage unit having a volume different from the volume of the volume space 70. By attaching and detaching the upstream end portion of the extended water storage portion inlet pipe 58 from the downstream end portion of the makeup water flow channel tube 56, the water storage portion 60 is detachably attached to the makeup water flow channel portion 28. The 60 volume spaces 70 can be easily changed to water storage portions having different volumes according to the usage situation, and the amount of makeup water can be easily changed.

  Furthermore, according to the makeup water supply device 19 according to the embodiment of the present invention, the float 84 that moves up and down by buoyancy in conjunction with the water level in the wash water tank 18 is used as an on-off valve that opens and closes the opening 72 of the water reservoir 60. Since the existing float valve 82 is employed, it is possible to prevent waste water from being generated with a simple structure and to achieve water saving. Further, for example, the number of parts can be reduced as compared with the structure of the on-off valve other than the float valve using the float 84.

  Furthermore, according to the makeup water supply device 19 according to the embodiment of the present invention, the small hole 88 formed between the opening 72c of the lower cylinder portion 72 of the water storage portion 60 and the float valve 82 that opens and closes the opening 72c. After the cleaning, even when the water storage unit 60 is almost filled with the makeup water, the makeup water in the water storage unit 60 gradually flows out through the small holes 88 into the cleaning water tank 18 little by little. Since the makeup water level in the interior of the washing water tank 18 is lowered to the same level as the washing water level in the washing water tank 18, the makeup water in the makeup water flow path section 28 flows from the makeup water flow path outlet 62 a to the opening 52 a of the overflow pipe 52. It is possible to prevent water from being discharged as makeup water. Therefore, it is possible to prevent the generation of waste water and achieve water saving.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 9 Drain flow path 16 Washing water tank apparatus 18 Washing water tank 18a Bottom surface 19 Supply water supply apparatus 20 Drain port 22 Water supply apparatus 24 Drain valve apparatus 26 Overflow pipe part 28 Supply water flow path part 32 Water supply valve 34 Water supply valve float 36 Water supply valve water discharge port 40 Valve body 41 Valve seat 46 Operation wire 48 Wire take-up device 50 Operation lever 52 Overflow pipe 52a Overflow pipe opening 54 Overflow pipe attachment 56 Replenishment water flow path pipe 58 Reservoir inlet pipe 60 Water storage part 62 Supply water channel water discharge pipe 62a Supply water channel water discharge port 64 Fixed part 68 Upper cylinder part 68a Upper end surface 68b Inlet 68c Outlet 68d Screw receiving part 70 Reservable volume space 72 Lower cylinder part 72a Screw engagement Joint portion 72b Lower surface 72c Opening 82 Float valve 84 Float 86 Cover valve body Part 86a outer lid valve 88 eyelet W ₀ pool water WL0 water cutoff level WL1 level WL2 level WL3 level WL4 level WL5 water cutoff level WL6 water WL7 level WL8 level WL9 level WL10 water cutoff level

Claims (9)

A water supply device for supplying cleaning water for cleaning the toilet bowl from the water source into the cleaning water tank, a drain valve disposed on the bottom surface of the cleaning water tank for opening and closing a drain channel, and the drain channel Wash water having an overflow pipe that communicates and extends upward from the bottom surface of the wash water tank and discharges the wash water to the toilet when the wash water in the wash water tank exceeds a full water level A replenishment water supply device that is provided in the tank device and supplies replenishment water to the toilet,
A replenishment water flow path section that branches from the water supply device and that has a water discharge port formed at the downstream end thereof directed to the opening of the overflow pipe to supply makeup water from the water discharge opening to the overflow pipe;
A water storage section provided in the makeup water flow path section and capable of storing a predetermined volume of makeup water;
An on-off valve that opens and closes in conjunction with the water level in the wash water tank, and is formed in the water storage part and capable of flowing makeup water in the water storage part to the wash water tank;
A makeup water supply device characterized by comprising:   The water storage unit is configured to supply the water supply device until the opening / closing valve opens the opening of the water storage unit after the water supply device starts supplying water in a state where the opening / closing valve closes the opening of the water storage unit after the cleaning is started. The makeup water supply apparatus according to claim 1, further comprising a volume capable of storing all the makeup water supplied to the makeup water flow path section.   The make-up water supply device according to claim 2, wherein a volume of water that can be stored in the water storage section is 49 cc or more.   The water storage section includes an upper end portion provided in the middle of the makeup water flow path section, and is formed so as to extend downward from the upper end section. The upper end section of the water storage section is replenished upstream of the water storage section. An inflow portion for allowing make-up water supplied from the water flow path portion to flow into the volume of the water storage portion and an inflow portion provided so as to be isolated from the flow path of the inflow portion so that the volume of the water storage portion is full. The supplementary water supply device according to any one of claims 1 to 3, further comprising an outflow part for allowing the supplementary water in the water storage part to flow out into the supplemental water flow path on the downstream side.   The said water storage part is attached to the said make-up water flow path part so that attachment or detachment is possible so that it can change to the other water storage part provided with the volume different from the volume of any one of Claim 1 thru | or 4. Makeup water supply device.   The makeup water supply device according to any one of claims 1 to 5, wherein the on-off valve is a float valve that moves up and down by buoyancy in conjunction with a water level in the cleaning water tank.   7. A makeup water supply apparatus according to claim 6, wherein a small hole is formed between the opening of the water storage section and the float valve that opens and closes the opening to communicate the water storage section and the washing water tank.   A washing water tank device comprising the makeup water supply device according to any one of claims 1 to 7.   A flush toilet provided with the flush water tank apparatus according to claim 8.

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