JP5446051B2 - Washing water tank device - Google Patents

Description

  The present invention relates to a washing water tank apparatus, and more particularly to a washing water tank apparatus for storing washing water for washing a toilet.

Conventionally, as a washing water tank apparatus for storing washing water for washing a toilet bowl, for example, as described in Patent Document 1, a drain formed at the bottom of the washing water tank and drainage for opening and closing the drain It is known that a cylinder is provided so as to surround the valve, an opening is formed on a side surface of the cylinder, and a switching valve for opening and closing the opening of the cylinder is provided.
In such a conventional flush water tank device, when the toilet bowl is washed extensively, the drain valve rises and the drain opening is opened with the opening of the cylinder body open with the switching valve. As a result, the cleaning water in the cleaning water tank passes through the opening of the cylinder and increases the amount of cleaning water discharged from the drain to the toilet. On the other hand, when performing small cleaning of the toilet, the opening of the cylinder opens the switching valve. In the closed state, the drainage valve rises to open the drainage port, and the amount of flushing water discharged from the flushing water tank through the drainage port to the toilet is reduced, so that either the large washing mode or the small washing mode can be used. Switch to washing mode.

JP-A-61-72144

  However, in the conventional washing water tank apparatus described above, for example, the opening of the cylinder and the switching valve for opening and closing the opening are provided only on a part of the side surface such as one side surface of the substantially rectangular parallelepiped cylinder. Therefore, when the cleaning water in the cleaning water tank flows into the cylinder from the opening of the cylinder while the opening of the cylinder is opened by the switching valve at the time of drainage by the drain valve in the large cleaning of the toilet bowl, the opening of the cylinder The flush water level in the proximal region inside the nearby cylinder is higher than the flush water level in the distal region inside the cylinder away from the cylinder opening, and the water level in the cylinder is farther from the opening. The problem is that the timing of the drain valve that moves in conjunction with the water level in the cylinder varies, and the amount of cleaning water discharged from the drain of the cleaning water tank also varies because it becomes unstable because it tilts downward. There is.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art, stabilizes the timing at which the drain valve descends when the toilet bowl is washed, and is discharged from the drain of the flush water tank to the toilet bowl. It is an object of the present invention to provide a cleaning water tank device that can stabilize the amount of cleaning water.

In order to achieve the above object, the present invention provides a washing water tank device for storing washing water for washing a toilet, wherein the washing water is stored and a drainage port is formed on a bottom surface, and the drainage A valve body that opens and closes a mouth, a water storage part that stores cleaning water, a cleaning water storage part that is provided below the water storage part and stores the cleaning water, and a hole that penetrates the water storage part and the cleaning water storage part And a float that moves up and down with the valve body in accordance with the water level in the washing water holding part and opens and closes the hole part, from the lower part of the washing water holding part A drainage valve device that lowers the float and the valve body and closes the drainage port when air flows in and loses the buoyancy of the float, and the drainage valve device further includes the drainage device. Up from the bottom of the water storage tank to surround the mouth A cylindrical body having a side surface extending to the top and having an opening at the side and an opening formed in the side surface, and the opening of the cylindrical body is opened and closed so that an opening cross-sectional area of the opening of the cylindrical body can be adjusted. In the state where the switching valve and the switching valve open the opening of the cylindrical body, the valve body opens the drain, and the cleaning water in the water storage tank flows from the opening of the cylindrical body into the cylindrical body. And a water level lowering / stabilizing means for stabilizing the lowering of the level of the washing water in the cylinder when it flows into and discharged from the drain outlet.
In the present invention configured as described above, when the valve body of the drain valve device opens the drain outlet in a state where the switching valve opens the opening of the cylinder, the washing water in the water storage tank is discharged from the opening of the cylinder. It flows into the cylinder and is discharged from the drain. At this time, since the water level lowering stabilizing means can stabilize the water level lowering of the cleaning water in the cylinder, the timing at which air flows from the lower part of the cleaning water holding part of the drain valve device can also be stabilized. The timing at which the valve body of the drain valve device descends can be stabilized, and the amount of washing water discharged from the drain port can be stabilized.

In the present invention, preferably, the cylindrical body is formed in the cylindrical body, a first side surface part in which the opening is formed, a second side surface part facing the first side surface part, and the first side surface part. A first internal region including the first side surface portion, and a second internal region formed in the cylindrical body and including the second side surface portion and different from the first internal region, The water level lowering stabilization means is provided so as to extend vertically between the inside of the cylinder and the outside of the drain valve device, and the internal area of the cylinder is defined as the first internal area and the second It is the wall body which divides into the interior area of.
In the present invention configured as described above, when the valve body of the drain valve device opens the drain outlet in a state where the switching valve opens the opening of the cylinder, the washing water in the water storage tank is discharged from the opening of the cylinder. It flows into the first internal region of the cylinder. At this time, the wall body that divides the inner region of the cylinder into the first inner region and the second inner region functions as a water level lowering stabilization unit that stabilizes the lowering of the cleaning water level in the cylinder. Since the washing water in the first internal region of the cylinder is prevented from flowing into the second internal region of the cylinder, the respective regions of the first internal region and the second internal region of the cylindrical body It is possible to stabilize the lowering of the water level inside. Therefore, since the water level drop in the washing water holding part of the drain valve device can be stabilized, the timing of air flowing in from the lower part of the washing water holding part can also be stabilized, and the valve body of the drain valve device is lowered. The timing to do so can be stabilized, and the amount of washing water discharged from the drain outlet can be stabilized.

In the present invention, preferably, the cylindrical body is formed in the cylindrical body, a first side surface part in which the opening is formed, a second side surface part facing the first side surface part, and the first side surface part. A first internal region including the first side surface portion, and a second internal region formed in the cylindrical body and including the second side surface portion and different from the first internal region, The water level lowering stabilizing means includes a second side surface portion of the cylinder so that a volume in the second inner region of the cylinder is smaller than a volume in the first inner region of the cylinder. An interval between the drain valve device and the flush water retaining portion is set to be shorter than an interval between the first side surface portion of the cylinder and the flush water retaining portion of the drain valve device.
In the present invention configured as described above, when the valve body of the drain valve device opens the drain outlet in a state where the switching valve opens the opening of the cylinder, the washing water in the water storage tank is discharged from the opening of the cylinder. It flows into the first internal region of the cylinder. At this time, the second side surface portion of the cylinder and the drainage are disposed so that the volume in the second inner region of the cylinder is smaller than the volume in the first inner region of the cylinder by the water level lowering stabilization means. Since the interval between the flush water retaining portion of the valve device is set shorter than the interval between the first side surface portion where the opening of the cylindrical body is formed and the flush water retaining portion of the drain valve device, The lowering of the water level in each of the first inner region and the second inner region of the cylindrical body can be further stabilized. Therefore, since the water level drop in the washing water holding part of the drain valve device can be stabilized, the timing of air flowing in from the lower part of the washing water holding part can also be stabilized, and the valve body of the drain valve device is lowered. The timing to do so can be stabilized, and the amount of washing water discharged from the drain outlet can be stabilized.

In the present invention, preferably, the water level lowering and stabilizing means further sets the interval between the second side surface portion of the cylindrical body and the wash water retaining portion of the drain valve device to be substantially zero. .
In the present invention configured as described above, as the water level lowering stabilizing means for stabilizing the lowering of the cleaning water level in the cylinder, the second side surface portion of the cylindrical body and the cleaning water retaining portion of the drain valve device are provided. Since the interval between them is set to be substantially zero, only the lowering of the water level of the washing water in the first inner region of the cylinder including the first side surface portion in which the opening of the cylinder is formed. The timing at which air flows in from the lower part of the washing water holding part can be adjusted. Therefore, the timing at which the valve body of the drain valve device descends can be stabilized, and the amount of cleaning water discharged from the drain port can be stabilized.

In this invention, Preferably, the side part of the said cylinder is provided with the 1st side part and 2nd side part which mutually oppose, and the opening part formed in the side part of the said cylinder is said 1st side part. A first opening formed in the side surface portion and a second opening formed in the second side surface portion, wherein the switching valve is configured to cut off the opening of the first opening portion of the cylindrical body. A first switching valve that opens and closes the first opening so that the area can be adjusted; and a second that opens and closes the second opening so that the opening cross-sectional area of the second opening of the cylinder can be adjusted And the water level lowering stabilization means sets the first opening and the second opening of the cylindrical body at substantially the same height position, and the first switching valve and the above Each of the second switching valves opens the drain valve device in a state where the first opening and the second opening of the cylindrical body are opened. When the drainage port is opened and the cleaning water in the water storage tank flows into the cylinder from the first opening and the second opening of the cylinder and is discharged from the drain, the cylinder Stabilize the lowering of the wash water level.
In the present invention configured as described above, when each of the first switching valve and the second switching valve opens the first opening of the cylindrical body, the valve body of the drain valve device opens the drain port. The washing water in the water storage tank flows into the cylinder from each of the first opening and the second opening of the cylinder and is discharged from the drain. At this time, the water level lowering stabilization means that sets the first opening and the second opening of the cylindrical body at substantially the same height position can stabilize the lowering of the cleaning water level in the cylindrical body. Therefore, it is possible to stabilize the timing at which air flows in from the lower part of the flush water retaining portion of the drain valve device, stabilize the timing at which the valve body of the drain valve device descends, and wash water discharged from the drain port. The amount of can be stabilized.

  According to the washing water tank apparatus of the present invention, the timing at which the drain valve descends when washing the toilet bowl can be stabilized, and the amount of washing water discharged from the flush water outlet to the toilet bowl can be stabilized.

It is sectional drawing of the flush toilet to which the flush water tank apparatus by 1st Embodiment of this invention was applied. It is front sectional drawing which shows schematic structure of the washing water tank apparatus by 1st Embodiment of this invention. It is a disassembled perspective view of the drain valve device of the washing water tank device by a 1st embodiment of the present invention. It is a top view of the drain valve device of the washing water tank device by a 1st embodiment of the present invention. It is a schematic sectional drawing which shows the state before the drainage start in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state at the time of the drainage start in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state in the middle of the waste_water | drain in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state after completion | finish of drainage in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state before the drainage start in the large washing mode of the washing water tank apparatus by 2nd Embodiment of this invention. It is a disassembled perspective view of the drain valve apparatus of the washing water tank apparatus by 2nd Embodiment of this invention. It is a top view of the drain valve device of the washing water tank device by a 2nd embodiment of the present invention. It is a schematic sectional drawing which shows the state at the time of the drainage start in the large washing mode of the washing water tank apparatus by 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the state in the middle of the waste_water | drain in the large washing mode of the washing water tank apparatus by 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the state after completion | finish of drainage in the large washing mode of the washing water tank apparatus by 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the state before the drainage start in the large washing mode of the washing water tank apparatus by 3rd Embodiment of this invention. It is a disassembled perspective view of the drain valve apparatus of the washing water tank apparatus by 3rd Embodiment of this invention. It is a top view of the drain valve device of the washing water tank device by a 3rd embodiment of the present invention. It is a schematic sectional drawing which shows the state at the time of the drainage start in the large washing mode of the washing water tank apparatus by 3rd Embodiment of this invention. It is a schematic sectional drawing which shows the state in the middle of drainage in the large washing mode of the washing water tank apparatus by 3rd Embodiment of this invention. It is a schematic sectional drawing which shows the state after completion | finish of drainage in the large washing mode of the washing water tank apparatus by 3rd Embodiment of this invention.

Next, a cleaning water tank apparatus according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
First, a flush toilet to which the flush water tank apparatus according to the first embodiment of the present invention is applied will be described with reference to FIG. FIG. 1 is a sectional view of a flush toilet to which a flush water tank apparatus according to a first embodiment of the present invention is applied.

  As shown in FIG. 1, reference numeral 1 indicates a flush toilet bowl. The toilet bowl 1 includes a toilet body 2, and the toilet body 2 has a bowl portion 4, a water conduit 6, and a bowl portion 4. A trap pipe 8 communicating with the lower part is formed. On the upper edge of the bowl portion 4 of the toilet body 2, there are formed a rim 10 overhanging on the inside and a first water discharge port 12 for discharging the wash water supplied from the water conduit 6. The wash water discharged from the water descends while swirling to wash the bowl portion.

Below the bowl portion 4, there is formed a water storage portion 14 whose storage surface W ₀ is indicated by a one-dot chain line. Below the water reservoir 14, an inlet 8a of the drain trap pipe 8 opens, and an ascending path 8b extends rearward from the inlet 8a. A descending path 8c continues to the ascending path 8b, and a lower end of the descending path 8c is connected to a discharge pipe (not shown) under the floor via a drain socket (not shown). In addition, a second water discharge port 16 for discharging the cleaning water supplied from the water conduit 6 is formed above the storage surface W ₀ of the bowl portion 4, and the cleaning water discharged from the second water discharge port 16 A swirling flow that swirls the water stored in the water storage section 14 in the vertical direction is generated.

  Above the water conduit 6 of the toilet body 2, a cleaning water tank device 18 that stores cleaning water supplied to the toilet body 2 is provided. As will be described later, a drain port 22 a communicating with the water conduit 6 of the toilet body 2 is formed at the bottom of the water storage tank 22 of the cleaning water tank device 18, and the cleaning water in the water storage tank 22 drains into the water conduit 6. It has come to be.

Next, a schematic configuration of the cleaning water tank apparatus 18 will be described with reference to FIG. FIG. 2 is a front sectional view showing a schematic structure of the cleaning water tank apparatus according to the first embodiment of the present invention.
Note that the flush water tank apparatus according to the present embodiment can also be applied to other types of flush toilets (for example, siphon flush toilets) other than the wash-off type described above.

  As shown in FIG. 2, the cleaning water tank device 18 includes a ceramic exterior tank 20, a water storage tank 22 that is disposed inside the ceramic tank 20 and stores cleaning water, and a lid 24 that is placed on the exterior tank 20. It is equipped with.

The water storage tank 22 is provided with a heat insulator 26 so as to surround it, and the water tank 22 is attached to the exterior tank 20 by a predetermined engagement member 28 via the heat insulator 26.
In addition, a drain port 22 a that communicates with the water conduit 6 of the toilet body described above is formed on the bottom surface of the water storage tank 22. The water storage tank 22 is also attached to the exterior tank 20 by fixing the drain port member 22b extending to the side surface of the drain port 22a with a predetermined engagement member 30.

Further, the lid body 24 is provided with a hand-washing currant 32 for discharging water for hand-washing into a hand-washing bowl 24 a formed on the lid body 24. The water in the hand-washing basin 24a discharged from the hand-washing currant 32 flows into the water storage tank 22 through a water discharge port (inlet) 24b formed in the hand-washing basin 24a.
Below the lid body 24, a water guide member 38 that guides water flowing from the water discharge port 24 b to the outside of the control cylinder 36 of the drain valve device 34 described later is provided.

  Next, the cleaning water tank device 18 includes a cleaning water supply device 40. This washing water supply apparatus 40 is the same as the conventional one, and is in communication with a water supply pipe 42, a water supply apparatus float 44, and a water supply pipe 42 connected to a water supply source (not shown) such as an external water pipe. The water storage tank 22 is provided with a water discharge pipe 45 for discharging cleaning water, a water supply valve 48 connected to a water supply device float 44 via a lever 46, and the like.

  In this embodiment, the cleaning water supply device 40 starts water supply after a predetermined time from the start of drainage. In the present embodiment, the water stop water level when the water storage tank 22 is full is made constant at the position (WL0) shown in FIG.

  The washing water supply device 40 includes a hand washing water supply pipe 50 for supplying water to the hand washing caran 32. When the washing water supply to the toilet is started (when drainage is started), the hand washing caran 32 of the lid 24 described above is provided. The water supply is started.

Next, the washing water tank device 18 includes an operation device 52 and a drain valve device 34 that is operated by the operation of the operation device 52.
The operation device 52 includes an operation lever 54, a motor 56, and an operation button 58 connected to the motor 56.
The operation button 58 includes two operation buttons for large cleaning and small cleaning described later.

When the operation lever 54 is rotated (90 degrees) to one side (front side in the present embodiment), large cleaning described later is started, and is rotated (90 degrees) to the other side (back side in the present embodiment). If it does, it will be a manual operation lever which operates the drain valve device 34 so that the small washing mentioned below may be started.
When the large cleaning button is pressed, the motor 56 rotates in the same direction as the operation lever 54 (front side). When the small cleaning button is pressed, the motor 56 rotates in the other direction (the back). The drain valve device 34 is operated so as to start large washing or small washing. Thus, in the present embodiment, the user may operate the operation lever 54 or press the operation button 58 for the large cleaning and the small cleaning.

A rotation transmission member 60 constituted by a wire member, a universal joint, or the like is connected to the operation lever 54 and the motor 56.
A first lifting member 62 and a second lifting member 64 that swing around the rotation transmitting member 60 are attached to the other end side of the rotation transmitting member 60 in accordance with the rotation thereof. The upper end portion of the first ball chain 66 and the upper end portion of the second ball chain 68 are attached to the tip portions of the lifting member 62 and the second lifting member 64, respectively.

  When the rotation transmitting member 60 is rotated to one side (at the time of large cleaning), only the first lifting member 62 swings to one side of the first lifting member 62 and the second lifting member 64. When only the first ball chain 66 is pulled up and the rotation transmitting member 60 is rotated to the other side (at the time of small washing), both the first lifting member 62 and the second lifting member 64 are moved to the other side. The mechanism is configured to swing and pull up both the first ball chain 66 and the second ball chain 68.

Next, the drain valve device 34 will be described with reference to FIGS.
FIG. 3 is an exploded perspective view of the drain valve device of the cleaning water tank apparatus according to the first embodiment of the present invention, and FIG. 4 is a plan view of the drain valve device of the cleaning water tank apparatus according to the first embodiment of the present invention. It is.
First, as shown in FIG. 3, the drain valve device 34 of the cleaning water tank device 18 according to the present embodiment includes a cylindrical body 70 provided so as to extend upward from the bottom surface of the water storage tank 22 so as to surround the drain port 22a. The switching valve 72 that opens and closes the opening 70 a formed on the side surface of the cylindrical body 70, the valve body 74, the control cylinder 36 disposed inside the cylindrical body 70, and the inside of the control cylinder 36 The float 76 to be arranged and a fixing member 77 for fixing the lower end of the first ball chain 66 to the upper end of the float 76 are provided.

As shown in FIG. 3, the opening part 70a of the cylinder 70 is formed in the substantially middle part of the up-down direction in one side surface of the cylinder 70, and the cross section of this opening part 70a becomes a substantially rectangular shape.
Further, the cylinder 70 includes shafts 70b below and on both sides below the opening 70a, and the switching valve 72 includes a receiving portion 72a that is rotatably attached to the shaft 70b of the cylinder 70.
Further, the lower end of the second ball chain 68 is attached to the upper end of the switching valve 72, and the second lifting member 64 pulls up the second ball chain 68, so that the switching valve 72 is connected to the shaft of the cylinder 70. It can be rotated from a predetermined lower position around 70b to a position where the opening 70a is closed.

  A weight 78 is attached to the switching valve 72. The second ball chain by the second lifting member 64 from the initial position where the switching valve 72 opens the opening 70a before being lifted by the second lifting member 64 as shown in FIG. 68, when the switching valve 72 closes the opening 70a and the lifting of the second ball chain 68 by the second lifting member 64 is released, the weight of the switching valve 72 and the weight 78 are increased. Thus, the switching valve 72 returns to the initial position where the opening 70a is opened.

The float 76 includes a float main body 76a formed in a substantially cylindrical shape, and an upper rod-shaped portion 76b and a lower rod-shaped portion 76c extending in the vertical direction. A lower end portion of the first ball chain 66 is provided at an upper end portion of the upper rod-shaped portion 76b. Is attached, and the lower end portion of the first ball chain 66 is fixed to the upper end portion of the upper rod-shaped portion 76b by a fixing member 77.
Further, a lower end portion of the lower rod portion 76c is provided with a valve body holding portion 76d that is formed in a groove shape along the circumferential direction and radially inward and to which a valve body 74 that opens and closes the drain port 22a is attached. The valve body 74 is fitted and fixed to the valve body holding portion 76a, and moves up and down together with the float 76 to function as a drain valve that opens and closes the drain port 22a.

The control cylinder 36 includes a cylindrical side wall 36a and a substantially circular cross-sectional side wall 36b formed to fit the upper surface 76e having a substantially circular cross-sectional shape of the float body 76a. In the center portion, a hole portion 36c is formed through the upper rod-shaped portion 76b of the float 76.
Further, as will be described later, when the upper surface portion 76e of the float main body 76a comes into close contact with the lower surface of the lateral wall portion 36b due to buoyancy, the control cylinder 36 has a water storage portion 36d for storing cleaning water and a cleaning device for holding the cleaning water. A water retaining portion 36e is formed. The water storage part 36d and the washing water storage part 36e are formed in a substantially cylindrical shape by the side wall 36a of the control cylinder 36.
Further, a small hole 36i is formed on the side of the opening 70a of the cylindrical body 70 in the side wall 36a that forms the water storage portion 36d of the control cylinder 36, and an outer side is provided in the lower part of the washing water retaining part 36e of the control cylinder 36. An inflow port 36f is formed for allowing the washing water to flow into the drain port 22a.

Further, as shown in FIGS. 3 and 4, on the front side and the back side of the side wall 36 a of the control cylinder 36, it extends in the vertical direction and divides the inner area of the cylinder body 70 into two inner areas V 1 and V 2. Thus, partition walls 36g and 36h, which are a pair of wall bodies protruding in the front-rear direction, are provided.
As will be described later, these partition walls 36g and 36h are disposed in the water storage tank 22 in a state in which the opening 70a of the cylindrical body 70 is opened by the switching valve 72 when draining by the drain valve device 34 in the large washing of the flush toilet 1. When the cleaning water flows into the cylindrical body 70 from the opening 70a of the cylindrical body 70, it functions as a water level lowering stabilization means for stabilizing the lowering of the cleaning water level in the cylindrical body 70.

Further, the inner region V1 of the cylinder 70 is formed between the side wall 70c of the cylinder 70 in which the opening 70a of the cylinder 70 is formed and the side wall 36a including the partition walls 36g and 36h of the control cylinder 36. This is an internal region of the cylinder 70 disposed on the proximal side with respect to the opening 70 a of the cylinder 70.
On the other hand, the inner region V2 of the cylindrical body 70 includes a side wall 70d of the cylindrical body 70 facing the side wall 70c of the cylindrical body 70 in which the opening 70a of the cylindrical body 70 is formed, and partition walls 36g and 36h of the control cylinder 36. This is an internal region of the cylinder 70 that is formed between the side wall 36a and the opening 70a of the cylinder 70 and is disposed on the distal side.

  Here, in the present embodiment, as an example, the partition walls 36g and 36h are diagonally connected to the most front side position and the most back side position of the side wall 36a of the substantially cylindrical control cylinder 36 as shown in FIG. The inner region V1 proximal to the opening 70a in the inner region of the cylindrical body 70 and the inner region V2 distal to the opening 70a in the inner region of the cylindrical body 70. However, the present invention is not limited to such a form. For example, the internal region V1 of the cylindrical body 70 is not limited to that of the cylindrical body 70. The partition walls 36g and 36h are arranged so as to be larger than the inner region V2 by shifting the partition walls 36g and 36h to the distal side with respect to the opening 70a of the cylinder 70. Change to distal or proximal with respect to 70a And, the ratio of the internal volume of the inner region V2 of the inner area V1 and the cylindrical body 70 of the cylinder 70 may be appropriately changed.

  In the present embodiment, as an example, the partition walls 36g and 36h are described as being provided on the front side and the back side of the side wall 36a of the control cylinder 36, respectively. However, the present invention is not limited to such a form. Instead of providing the partition walls 36g, 36h on the front side and the back side of the side wall 36a of the control cylinder 36, the one corresponding to such a partition wall 36g, 36h is the cylinder 70 side (the inner peripheral side of the cylinder 70). Alternatively, a plate-shaped partition member corresponding to the partition walls 36g and 36h may be provided as a separate member between the side wall 36a of the control cylinder 36 and the cylinder 70.

Next, the operation (action) of the cleaning water tank apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 2 and 5 to 8.
FIG. 5 is a schematic cross-sectional view showing a state before the start of drainage in the large cleaning mode of the cleaning water tank apparatus according to the first embodiment of the present invention, and FIG. 6 is a cleaning water tank apparatus according to the first embodiment of the present invention. It is a schematic sectional drawing which shows the state at the time of the start of drainage in the large washing mode. FIG. 7 is a schematic cross-sectional view showing a state in the middle of drainage in the large cleaning mode of the cleaning water tank apparatus according to the first embodiment of the present invention, and FIG. 8 is a cleaning water tank according to the first embodiment of the present invention. It is a schematic sectional drawing which shows the state after completion | finish of the waste_water | drain in the large washing mode of an apparatus.

First, as shown in FIGS. 2 and 5, the drain port 22 a is closed by the valve body 74 of the drain valve device 34 in a state before the drain of the flush water tank device 18 is started in the large washing mode.
At this time, the switching valve 72 is in a state in which the opening 70a of the cylindrical body 70 is opened by its own weight and the weight 78.

Next, as shown in FIGS. 2 and 6, when starting the large washing mode, the user rotates the operation lever 54 90 degrees toward the front, or the large washing button is pressed and the motor 56 is activated. Then, only the first lifting member 62 is swung, and the float 76 of the drain valve device 34 is pulled up via the first ball chain 66. Thereby, the valve body 74 of the drain valve device 34 is raised, the drain port 22a is opened, drainage is started, and the water level WL1 of the water storage tank 22 is lowered.
Further, since the second lifting member 64 does not swing and the second ball chain 68 is not lifted by the second lifting member 64, the switching valve 72 is in a state in which the opening 70 a of the cylindrical body 70 is kept open. It has become.
At this time, as shown in FIG. 6, the float 76 is brought into close contact with the lateral wall portion 36 b of the upper control cylinder 36 and is lifted up to a position where the hole portion 36 c is closed, and in the water storage portion 36 d and the washing water storage portion 36 e, Each of them is in a state filled with cleaning water.

  Further, when the lifting of the float 76 is completed by the first lifting member 62, the operation lever 54 is returned to the initial position, the first lifting member 62 is returned to the initial position, or the first lifting member 62 is moved to the initial position. The motor 56 is actuated to return to the initial position.

Next, as shown in FIG. 7, after the start of drainage, the entire water level of the wash water in the water storage tank 22 decreases with time, and the upper edge (upper surface) of the cylindrical body 70 indicated by the broken line WL <b> 2 in FIG. 7. ) When the water level drops to a nearby water level, the washing water in the cylinder 70 is suddenly discharged from the drain port 22a.
At this time, the entire water level of the washing water in the water storage tank 22 is lowered from the water level WL2 to the water level WL3.

  Further, the inner region of the cylinder 70 is an inner region V1 disposed on the proximal side with respect to the opening 70a of the cylinder 70 communicating with the inside of the water storage tank 22 by the partition walls 36g and 36h of the control cylinder 36. And the internal region V2 disposed on the distal side with respect to the opening 70a of the cylindrical body 70, the water level in the internal region V1 of the cylindrical body 70 is determined from within the water storage tank 22. The entire cleaning water in the water storage tank 22 is obtained by the cleaning water flowing in through the opening 70a of the cylinder 70 and the cleaning water flowing into the internal region V1 from the water storage section 36d of the control cylinder 36 through the small hole 36i. It becomes equal to the water level WL3.

On the other hand, regarding the water level in the inner region V2 of the cylinder 70, the cleaning water in the inner region V1 of the cylinder 70 enters the inner region V2 of the cylinder 70 by the partition walls 36g and 36h of the control cylinder 36. Therefore, the water level WL4 is lower than the water level WL3 in the inner region V1 of the cylindrical body 70.
At this time, with respect to the water level WL4 of the cleaning water in the inner region V2 of the cylinder 70, the flow of the cleaning water flowing into the inner region V1 from the opening 70a of the cylinder 70 by the partition walls 36g and 36h of the control cylinder 36. Since it becomes difficult to be affected, the water level is lowered in a stable state until the valve body 74 closes the drain port 22a.
That is, the partition walls 36g and 36h of the control cylinder 36 function as a water level lowering stabilization unit that stabilizes the lowering of the water level in the inner region V2 of the cylindrical body 70.

After that, the water level WL4 in the inner region V2 of the cylindrical body 70 shown in FIG. 7 is stably lowered with the passage of time, and the upper surface of the inlet 36f disposed at the lower part of the washing water retaining portion 36e of the control cylinder 36 is reached. When the water level is lowered to the vicinity of the edge, air flows from the lower part of the washing water holding part 36e into the washing water holding part 36e through the inflow port 36f, and the float 76 loses buoyancy.
As a result, at the same time as the float 76 descends, the hole 36c of the water storage section 36d is opened, and the cleaning water in the water storage section 36d flows into the cleaning water storage section 36e from the hole 36c, and the cleaning in the cleaning water storage section 36e is performed. The water flows downward and is discharged from the drain port 22a. And as shown in FIG. 8, the valve body 74 closes the drain port 22a, and drainage is complete | finished.

  At this time, since the water level in the inner region V2 of the cylinder 70 decreases stably, the lowering of the water level in the cleaning water retaining part 36e of the control cylinder 36 is also stable, and from the lower part of the cleaning water retaining part 36e of the control cylinder 36 The timing at which air flows into the washing water holding part 36e is also stable without variation for each drainage operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

Finally, as shown in FIG. 8, the entire water level WL5 of the cleaning water in the water storage tank 22 becomes the water level near the lower edge of the opening 70a of the cylinder 70, and is within the inner region V1 of the cylinder 70. Both the water level and the water level in the inner region V2 of the cylindrical body 70 are the water level WL6 lower than the water level WL5.
Here, the water level WL6 shown in FIG. 8 indicates that after the valve body 74 closes the drain port 22a, the cleaning water in the water storage tank 22 outside the cylinder body 70 flows into the cylinder 70 through the opening 70a of the cylinder body 70. It is the dead water level that flows into the body 70 and is finally obtained.

On the other hand, as shown in FIG. 2, when starting the small cleaning mode, the user rotates the operation lever 54 90 degrees to the back side, or the small cleaning button is pressed and the motor 56 is activated. Both the first lifting member 62 and the second lifting member 64 are swung.
As the first pulling member 62 swings, the float 76 is lifted through the first ball chain 66, thereby opening the drain port 22a and starting draining.
Further, the switching valve 72 is pulled up via the second ball chain 68 by the swinging of the second lifting member 64, and the switching valve 72 closes the opening 70 a of the cylindrical body 70.

  Immediately after completion of such lifting, the operation lever 54 is returned to the initial position, and the first lifting member 62 is returned to the initial position, or the motor 56 so that the first lifting member 62 returns to the initial position. Is activated.

  At this time, the float 76 is brought into close contact with the lateral wall portion 36b of the upper control cylinder 36 and is lifted up to a position where the hole portion 36c is closed, and the water storage portion 36d and the cleaning water retaining portion 36e are filled with cleaning water, respectively. It is in the state.

  Since the water pressure outside the cylinder body 70 is lower than the water pressure inside the cylinder body 70 due to the differential pressure caused by the flow rate difference between the cleaning water inside and outside the cylinder body 70, the switching valve 72 opens the cylinder body 70. The part 70a is kept closed.

Next, after the start of drainage, when the entire water level of the cleaning water in the water storage tank 22 decreases with time and the water level decreases to the vicinity of the upper edge (upper surface) of the cylindrical body 70, the cleaning water in the cylindrical body 70 is recovered. Is suddenly discharged from the drain port 22a.
At this time, via the inlet 36f of the control cylinder 36 disposed in the inner area V1 on the proximal side and the inner area V2 on the distal side with respect to the opening 70a in the inner area of the cylinder 70, Air enters the washing water holding part 36e from the lower part of the washing water holding part 36e of the control cylinder 36, the float 76 loses buoyancy, the washing water in the water storage part 36d and the washing water holding part 36e flows downward, and the float 76 The valve body 74 is lowered, the drain port 22a is closed, and the drainage is completed.

  In addition, since the water levels in the inner regions V1 and V2 of the cylinder 70 both decrease stably, the decrease in the water level in the cleaning water storage part 36e of the control cylinder 36 is also stable, and the cleaning water storage part 36e of the control cylinder 36 The timing at which air flows from the lower part into the washing water retaining part 36e is also stable without variation for each draining operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

  Further, in the small cleaning mode, since the draining operation by the drain valve device 34 is performed in a state where the opening 70a of the cylindrical body 70 is closed, the cleaning water in the water storage tank 22 is opened by the switching valve 72. Compared with the large cleaning mode in which the water is discharged from the drain port 22a through the opening 70a of the cylindrical body 70, the cleaning water in the water storage tank 22 cannot pass through the opening 70a of the cylindrical body 70 from the drain port 22a. The amount of washing water discharged is reduced.

According to the washing water tank device 18 according to the first embodiment of the present invention described above, the switching valve 72 opens the opening 70 a of the cylindrical body 70 when draining in the large washing mode by the drain valve device 34. When the valve body 74 of the drain valve device 34 opens the drain port 22a, the cleaning water in the water storage tank 22 flows into the inner region V1 of the cylinder 70 from the opening 70a of the cylinder 70.
At this time, the partition walls 36g and 36h of the control cylinder 36 prevent the cleaning water flowing into the internal region V1 of the cylindrical body 70 from entering the internal area V2 of the cylindrical body 70. In order to function as a water level lowering stabilization unit that stabilizes the lowering of the water level in V2, the timing at which air flows from the lower part of the washing water holding part 36e of the control cylinder 36 into the washing water holding part 36e varies for each drainage operation. Can be stabilized. As a result, it is possible to stabilize the timing at which air flows from the lower part of the washing water holding part 36e of the control cylinder 36 into the washing water holding part 36e without variation for each drainage operation. In addition, the float 76 descends in a stable state, and the valve closing operation is performed in a state in which the valve element 74 closes the drain port 22a in a stable state. Therefore, the washing water discharged from the drain port 22a The amount of can be stabilized.

Next, a cleaning water tank apparatus according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 9 is a schematic sectional view showing a state before the start of drainage in the large washing mode of the washing water tank apparatus according to the second embodiment of the present invention, and FIG. 10 is a washing water tank apparatus according to the second embodiment of the present invention. It is a disassembled perspective view of this drain valve device.

  FIG. 11 is a plan view of the drain valve device of the cleaning water tank apparatus according to the second embodiment of the present invention, and FIG. 12 shows the drainage in the large cleaning mode of the cleaning water tank apparatus according to the second embodiment of the present invention. It is a schematic sectional drawing which shows the state at the time of a start.

  Further, FIG. 13 is a schematic cross-sectional view showing a state in the middle of drainage in the large cleaning mode of the cleaning water tank apparatus according to the second embodiment of the present invention, and FIG. 14 is a cleaning water tank according to the second embodiment of the present invention. It is a schematic sectional drawing which shows the state after completion | finish of the waste_water | drain in the large washing mode of an apparatus.

  Note that the cleaning water tank apparatus according to the second embodiment of the present invention has the same basic structure as that of the first embodiment described above, and only the structure of the cylindrical body 170 is different. Therefore, only the different parts will be described below. Moreover, the thing of the structure similar to 1st Embodiment has attached | subjected the same code | symbol.

  As shown in FIGS. 9 to 14, in the flush water tank device 118 according to the second embodiment of the present invention, a cylinder formed between the outer periphery of the control cylinder 36 of the drain valve device 134 and the inner periphery of the cylinder body 170. The internal region V3 of the body 170 is formed between the side wall 170c of the cylindrical body 170 in which the opening 170a of the cylindrical body 170 is formed and the side wall 36a including the partition walls 36g and 36h of the control cylinder 36. (Region corresponding to the inner region V1 of the cylindrical body 70 of the first embodiment) only.

  On the other hand, the distance between the side wall 170d of the cylindrical body 170 facing the side wall 170c of the cylindrical body 170 and the side wall 36a forming the cleaning water retaining portion 36e of the control cylinder 36 is set to be substantially zero. It is set so as to eliminate the space in the inner region of the cylindrical body 170 disposed on the distal side with respect to the opening 170a (the region corresponding to the inner region V2 of the cylindrical body 70 of the first embodiment).

Next, the operation (action) of the cleaning water tank apparatus according to the second embodiment of the present invention will be described with reference to FIGS.
First, as shown in FIG. 12, when the large washing mode is started as shown in FIG. 12 from the state before the start of drainage in the large washing mode of the washing water tank device 118 as shown in FIG. 9, only the first lifting member 62 is shaken. The float 76 of the drain valve device 134 is pulled up via the first ball chain 66. Thereby, the valve body 74 of the drain valve device 134 is raised, the drain port 22a is opened, drainage is started, and the water level WL101 of the water storage tank 22 is lowered.

In addition, since the second lifting member 64 does not swing and the second ball chain 68 is not lifted by the second lifting member 64, the switching valve 72 is in a state in which the opening 170a of the cylindrical body 170 remains open. It has become.
At this time, as shown in FIG. 12, the float 76 is brought into close contact with the lateral wall portion 36b of the upper control cylinder 36 and is lifted up to a position where the hole portion 36c is closed, and in the water storage portion 36d and the washing water storage portion 36e, Each of them is in a state filled with cleaning water.

Next, as shown in FIG. 13, after the start of drainage, the entire water level of the cleaning water in the water storage tank 22 decreases with time, and the upper edge (upper surface) of the cylindrical body 170 indicated by the broken line WL <b> 102 in FIG. 13. ) When the water level drops to the vicinity of the water level, the cleaning water in the cylinder 170 is suddenly discharged from the drain port 22a.
At this time, the entire water level of the cleaning water in the water storage tank 22 is lowered from the water level WL102 to the water level WL103 near the lower edge of the opening 170a of the cylindrical body 170.

  Further, as shown in FIG. 13, cleaning water flows into the inner region V3 of the cylinder 170 from the water storage tank 22 through the opening 170a of the cylinder 170, and from the water storage part 36d of the control cylinder 36. While the cleaning water that has flowed into the internal region V3 through the small hole 36i flows, the cleaning water in the internal region V3 of the cylindrical body 170 is discharged from the drain port 22a through the inflow port 36f. The water level WL104 in the internal region V3 is lower than the water level WL103 in the vicinity of the lower edge of the opening 170a of the cylindrical body 170.

Further, when the cleaning water in the water storage tank 22 flows into the internal region V3 from the opening 170a of the cylinder 170, the side wall 170d of the cylinder 170 and the control cylinder 36 where the opening 170a of the cylinder 170 is not provided. Since the distance between the side wall 36a and the side wall 36a of the cylindrical body 170 is set to be substantially zero, it is stable within the inner region V3 of the cylindrical body 170 without entering between the side wall 170d of the cylindrical body 170 and the side wall 36a of the control cylinder 36. Therefore, the water level WL104 in the internal region V3 of the cylindrical body 170 also decreases in a stable state until the valve body 74 closes the drain port 22a.
That is, the interval between the side wall 170d of the cylindrical body 170 where the opening 170a of the cylindrical body 170 is not provided and the side wall 36a of the control cylinder 36 is set to substantially zero, so that the inside of the inner region V3 of the cylindrical body 170 is set. The drop in water level is stabilized.

Thereafter, the water level WL104 in the inner region V3 of the cylindrical body 170 shown in FIG. 13 decreases stably with the passage of time, and the upper surface of the inlet 36f disposed at the lower part of the washing water retaining portion 36e of the control cylinder 36 is reached. When the water level is lowered to the vicinity of the edge, air flows from the lower part of the washing water holding part 36e into the washing water holding part 36e through the inflow port 36f, and the float 76 loses buoyancy.
As a result, at the same time as the float 76 descends, the hole 36c of the water storage section 36d is opened, and the cleaning water in the water storage section 36d flows into the cleaning water storage section 36e from the hole 36c, and the cleaning in the cleaning water storage section 36e is performed. The water flows downward and is discharged from the drain port 22a. And as shown in FIG. 14, the valve body 74 closes the drain port 22a, and drainage is complete | finished.

  At this time, since the water level in the internal region V3 of the cylinder 170 decreases stably, the decrease in the water level in the cleaning water storage part 36e of the control cylinder 36 is also stable, and from the lower part of the cleaning water storage part 36e of the control cylinder 36 The timing at which air flows into the washing water holding part 36e is also stable without variation for each drainage operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

Finally, as shown in FIG. 14, the entire water level WL105 of the washing water in the water storage tank 22 becomes the water level near the lower edge of the opening 170a of the cylinder 170, and in the internal region V2 of the cylinder 170 The water level becomes a water level WL106 lower than the water level WL105.
Here, the water level WL106 shown in FIG. 14 indicates that after the valve body 74 closes the drain port 22a, the washing water in the water storage tank 22 outside the cylinder 170 passes through the opening 170a of the cylinder 170. It is the dead water level that flows into the body 170 and is finally obtained.

On the other hand, in the small cleaning mode, after the start of drainage, when the overall water level of the cleaning water in the water storage tank 22 decreases with time and reaches a level near the upper edge (upper surface) of the cylindrical body 170, the cylindrical body. The cleaning water in 170 is suddenly discharged from the drain port 22a.
Further, in the small cleaning mode, since the drainage operation by the drain valve device 134 is performed in a state where the opening 170 a of the cylindrical body 170 is closed by the switching valve 72, the cleaning water in the water storage tank 22 is transferred by the switching valve 72. Compared with the large washing mode in which the drainage port 22a is discharged through the opening 170a of the opened cylindrical body 170, the washing water in the water storage tank 22 is drained by an amount that does not pass through the opening 170a of the cylindrical body 170. The amount of washing water discharged from the mouth 22a is reduced.

Further, the water level in the inner region V3 of the cylindrical body 170 stably decreases with the passage of time, and the water level in the vicinity of the upper edge of the inflow port 36f disposed at the lower part of the washing water retaining part 36e of the control cylinder 36. When the air pressure decreases to the air level, air flows into the cleaning water retaining portion 36e from the lower portion of the cleaning water retaining portion 36e via the inflow port 36f, and the float 76 descends losing buoyancy.
At this time, since the water level in the internal region V3 of the cylinder 170 decreases stably, the decrease in the water level in the cleaning water storage part 36e of the control cylinder 36 is also stable, and from the lower part of the cleaning water storage part 36e of the control cylinder 36 The timing at which air flows into the washing water holding part 36e is also stable without variation for each drainage operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

According to the washing water tank device 118 according to the second embodiment of the present invention described above, when the drain valve device 134 drains the large washing mode, the switching valve 72 opens the opening 170a of the cylindrical body 170. When the valve body 74 of the drain valve device 134 opens the drain port 22a, the cleaning water in the water storage tank 22 flows into the inner region V3 of the cylinder 170 from the opening 170a of the cylinder 170.
At this time, the interval between the side wall 170d of the cylinder 170 where the opening 170a of the cylinder 170 is not provided and the side wall 36a of the control cylinder 36 is set to be substantially zero, so that the inside of the internal region V3 of the cylinder 170 is set. Since the lowering of the water level is stabilized, the timing at which air flows from the lower part of the washing water retaining part 36e of the control cylinder 36 into the washing water retaining part 36e can be stabilized without variation for each drainage operation. As a result, it is possible to stabilize the timing at which air flows from the lower part of the washing water holding part 36e of the control cylinder 36 into the washing water holding part 36e without variation for each drainage operation. In addition, the float 76 descends in a stable state, and the valve closing operation is performed in a state in which the valve element 74 closes the drain port 22a in a stable state. Therefore, the washing water discharged from the drain port 22a The amount of can be stabilized.

  In the washing water tank device 118 according to the second embodiment of the present invention described above, as an example, the cylinder 170 formed between the outer periphery of the control cylinder 36 of the drain valve device 134 and the inner periphery of the cylinder 170 is provided. The internal region includes only the internal region V3 formed between the side wall 170c of the cylindrical body 170 in which the opening 170a of the cylindrical body 170 is formed and the side wall 36a including the partition walls 36g and 36h of the control cylinder 36. The internal region of the cylindrical body 170 disposed on the distal side with respect to the opening 170a of the cylindrical body 170 by setting the interval between the sidewall 170d of the cylindrical body 170 and the side wall 36a of the control cylinder 36 to be substantially zero. However, the present invention is not limited to such a form. For example, the interval between the side wall 170d of the cylinder 170 and the side wall 36a of the control cylinder 36 is set to a predetermined interval other than zero. Set An internal region of the cylindrical body 170 disposed on the distal side with respect to the opening 170a of the cylindrical body 170, and an internal region V3 of the cylindrical body 170 disposed on the proximal side with respect to the opening 170a of the cylindrical body 170 The ratio of the internal volume may be changed as appropriate.

Next, a cleaning water tank apparatus according to a third embodiment of the present invention will be described with reference to FIGS.
FIG. 15 is a schematic sectional view showing a state before the start of drainage in the large washing mode of the washing water tank apparatus according to the third embodiment of the present invention, and FIG. 16 is a washing water tank apparatus according to the third embodiment of the present invention. It is a disassembled perspective view of this drain valve device.

  FIG. 17 is a plan view of the drain valve device of the cleaning water tank apparatus according to the third embodiment of the present invention, and FIG. 18 shows the drainage in the large cleaning mode of the cleaning water tank apparatus according to the third embodiment of the present invention. It is a schematic sectional drawing which shows the state at the time of a start.

  Further, FIG. 19 is a schematic cross-sectional view showing a state in the middle of drainage in the large cleaning mode of the cleaning water tank apparatus according to the third embodiment of the present invention, and FIG. 20 is a cleaning water tank according to the third embodiment of the present invention. It is a schematic sectional drawing which shows the state after completion | finish of the waste_water | drain in the large washing mode of an apparatus.

  The cleaning water tank apparatus according to the third embodiment of the present invention has the same basic structure as the first and second embodiments described above, and differs only in the structure of the cylindrical body 270. I will explain only. Moreover, the thing of the structure similar to 1st Embodiment and 2nd Embodiment attaches | subjects the same code | symbol.

As shown in FIGS. 15 to 20, in the flush water tank device 218 according to the third embodiment of the present invention, a first opening is formed on one side surface portion of the side surface portions of the cylindrical body 270 of the drain valve device 234 facing each other. A portion 270 a is formed, and a second opening 270 b is formed on the other side surface portion of the cylindrical body 270.
Further, the first opening 270a and the second opening 270b of the cylindrical body 270 have the same substantially rectangular opening cross section, and with respect to the drain port 22a formed at the lower end of the cylindrical body 270, each other. They are arranged at almost the same height.

  Further, the cylindrical body 270 includes shafts 270c and 270d on the lower side and both sides of the first opening 270a and the second opening 270b, respectively. The shafts 270c and 270d include the first switching valve 272. The receiving part 272a and the receiving part 273a of the second switching valve 273 are respectively attached, and the first switching valve 272 and the second switching valve 273 are respectively connected to the first opening part 270a and the second opening part 270b of the cylindrical body 270. It is attached to each of them so that it can be opened and closed.

In addition, lower ends of the second ball chain 268 and the third ball chain 269 are attached to upper ends of the first switching valve 272 and the second switching valve 273, respectively.
On the other hand, the upper ends of the second ball chain 268 and the third ball chain 269 are attached to the second lifting member 64 shown in FIG. 2, and the second lifting member 64 is connected to the second ball chain 268 and the second ball chain 268. By pulling up each of the third ball chains 269, each of the first switching valve 272 and the second switching valve 273 has the first opening 270a from a predetermined lower position around each of the shafts 270c and 270d of the cylindrical body 270. And it can rotate to the position which closes each of the 2nd opening part 270b.

Further, weights 278 and 279 are attached to the first switching valve 272 and the second switching valve 273, respectively.
Each of the first switching valve 272 and the second switching valve 273 is in the first opening state before the second ball chain 268 and the third ball chain 269 are pulled up by the second lifting member 64 as shown in FIG. The second ball chain 268 and the third ball chain 269 are pulled up by the second pulling member 64 from the state of the initial position where each of the portion 270a and the second opening 270b is opened, and the first switching valve 272 is moved. After the second switching valve 273 closes the first opening 270a and the second opening 270b, the second ball chain 268 and the third ball chain 269 are lifted by the second lifting member 64. In this case, the first switching valve 272 and the second switching valve 273 have the first opening 270a and the second switching valve 273, respectively, due to the weight of the first switching valve 272 and the second switching valve 273 and the weight of the weights 278 and 279. So that the return to the state of the initial position is open each mouth 270b.

Furthermore, the inner region of the cylinder 270 is divided into two inner regions V4 and V5 by the partition walls 36g and 36h of the side wall 36a of the control tube 36.
The inner region V4 of the cylinder 270 is formed between the side wall 270e of the cylinder 270 in which the first opening 70a of the cylinder 270 is formed and the side wall 36a including the partition walls 36g and 36h of the control cylinder 36. ing.
On the other hand, the inner region V5 of the cylinder 270 is between the side wall 270f of the cylinder 270 where the second opening 70b of the cylinder 270 is formed and the side wall 36a including the partition walls 36g and 36h of the control cylinder 36. Is formed.

  Further, the distance between the side wall 270e of the cylinder 270 and the side wall 36a of the control cylinder 36 is equal to the distance between the side wall 270f of the cylinder 270 and the side wall 36a of the control cylinder 36, and the volume of the internal region V4 of the cylinder 270 The volume of the region V5 is also substantially equal to each other.

Next, the operation (action) of the cleaning water tank apparatus according to the third embodiment of the present invention will be described with reference to FIGS.
First, as shown in FIG. 15, when the large washing mode is started as shown in FIG. 18 from the state before the drainage in the large washing mode of the washing water tank device 218 as shown in FIG. 15, only the first lifting member 62 is shaken. The float 76 of the drain valve device 234 is pulled up through the first ball chain 66. Thereby, the valve body 74 of the drain valve device 234 is raised, the drain port 22a is opened, drainage is started, and the water level WL201 of the water storage tank 22 is lowered.

Further, since the second lifting member 64 does not swing and the second ball chain 268 and the third ball chain 269 are not lifted by the second lifting member 64, the first switching valve 272 and the second switching valve 273 Each is in a state where the first opening 270a and the second opening 270b of the cylindrical body 270 are left open.
At this time, as shown in FIG. 18, the float 76 is brought into close contact with the lateral wall portion 36b of the upper control cylinder 36 and pulled up to a position closing the hole portion 36c, and the water storage portion 36d and the washing water storage portion 36e are Each of them is in a state filled with cleaning water.

Next, as shown in FIG. 19, after the start of drainage, the overall water level of the wash water in the water storage tank 22 decreases with time, and the upper edge (upper surface) of the cylinder 270 indicated by the broken line WL202 in FIG. 19. ) When the water level drops to a nearby water level, the cleaning water in the cylinder 270 is suddenly discharged from the drain port 22a.
At this time, the total water level of the cleaning water in the water storage tank 22 drops from the water level WL202 to the water level WL203 near the lower edge of the first opening 270a and the second opening 270b of the cylindrical body 270.

  Further, as shown in FIG. 19, cleaning water flows into the inner region V4 of the cylinder 170 from the water storage tank 22 through the first opening 270a of the cylinder 270, and the water storage part 36d of the control cylinder 36 While the wash water that has flowed into the inner region V4 from the inside through the small hole 36i flows, the wash water in the inner region V4 of the cylinder 270 is discharged from the drain port 22a through the inlet 36f. The water level in the inner region V4 of the 270 becomes a water level WL204 that is lower than the water level WL203 near the lower edge of the first opening 270a of the cylindrical body 270.

  In addition, in the internal region V5 of the cylindrical body 170, as in the internal region V4 of the cylindrical body 170, cleaning water flows from the water storage tank 22 through the second opening 270b of the cylindrical body 270, and this cylindrical body 270. Since the cleaning water in the inner region V4 is discharged from the drain port 22a through the inlet 36f, the water level in the inner region V5 of the cylindrical body 270 is near the lower edge of the first opening 270a of the cylindrical body 270. The water level WL203 is lower than the water level WL203 and substantially equal to the water level WL204 in the inner region V4 of the cylindrical body 270.

In addition, since the cleaning water in the water storage tank 22 flows into the internal regions V4 and V5 from the first opening 270a and the second opening 270b of the cylindrical body 270, the water flows in a stable flow. The water level WL204 in each of the inner regions V4 and V5 of the cylindrical body 170 also decreases in a stable state until the valve body 74 closes the drain port 22a.
That is, for each of the first opening 270a and the second opening 270b of the cylindrical body 270 having the same opening cross section, each of the opposing side surface portions of the cylindrical body 270 is disposed at substantially the same height position. The partition wall 36g, 36h of the control cylinder 36 divides the inner area of the cylinder 270 into two inner areas V4, V5 having the same volume, thereby reducing the water level in the inner areas V4, V5 of the cylinder 270. Stabilized.

After that, the water level WL204 in the inner regions V4 and V5 of the cylindrical body 270 shown in FIG. 19 is stably lowered with the passage of time, and the inlet 36f disposed at the lower part of the washing water retaining portion 36e of the control cylinder 36. When the water level is lowered to the vicinity of the upper edge portion of the air, air flows into the washing water retaining portion 36e from the lower portion of the washing water retaining portion 36e through the inflow port 36f, and the float 76 loses buoyancy.
As a result, at the same time as the float 76 descends, the hole 36c of the water storage section 36d is opened, and the cleaning water in the water storage section 36d flows into the cleaning water storage section 36e from the hole 36c, and the cleaning in the cleaning water storage section 36e is performed. The water flows downward and is discharged from the drain port 22a. And as shown in FIG. 20, the valve body 74 closes the drain port 22a, and drainage is complete | finished.

  At this time, since the water level in the inner regions V4 and V5 of the cylinder 270 is lowered stably, the lowering of the water level in the washing water retaining part 36e of the control cylinder 36 is also stabilized, and the washing water retaining part 36e of the control cylinder 36 is stabilized. The timing at which air flows from the lower part into the washing water retaining part 36e is also stable without variation for each draining operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

Finally, as shown in FIG. 20, the total water level WL205 of the washing water in the water storage tank 22 is the water level near the lower edge of each of the first opening 270a and the second opening 270b of the cylindrical body 270. Thus, the water level in the inner regions V4 and V5 of the cylindrical body 270 becomes a water level WL206 lower than the water level WL205.
Here, in the water level WL206 shown in FIG. 20, after the valve body 74 closes the drain port 22a, the cleaning water in the water storage tank 22 outside the cylinder 270 is discharged from the first opening 270a and the first opening 270a of the cylinder 270. It is a dead water level that flows into the inside of the cylindrical body 270 through each of the two openings 270b and is finally obtained.

On the other hand, in the small cleaning mode, after the start of drainage, when the entire water level of the cleaning water in the water storage tank 22 decreases with time and reaches a level near the upper edge (upper surface) of the cylindrical body 270, the cylindrical body The washing water in 270 is suddenly discharged from the drain port 22a.
Further, in the small cleaning mode, the drain valve device 234 causes the first opening 270a and the second opening 270b of the cylindrical body 270 to be closed by the first switching valve 272 and the second switching valve 273, respectively. Since the drainage operation is performed, the cleaning water in the water storage tank 22 is respectively in the first opening 270a and the second opening 270b of the cylindrical body 270 in a state opened by the first switching valve 272 and the second switching valve 273. Compared to the large cleaning mode in which the water is discharged from the drain port 22a through the drain port 22a, the cleaning water in the water storage tank 22 is not passed through each of the first opening 270a and the second opening 270b of the cylindrical body 270. The amount of washing water discharged from the water is reduced.

Further, the water level in the inner regions V4 and V5 of the cylindrical body 270 stably decreases with the passage of time, and the vicinity of the upper edge of the inflow port 36f disposed at the lower part of the washing water retaining portion 36e of the control cylinder 36. When the water level drops to the water level, air flows from the lower part of the washing water holding part 36e into the washing water holding part 36e through the inflow port 36f, and the float 76 descends losing buoyancy.
At this time, since the water level in the inner regions V4 and V5 of the cylinder 270 is lowered stably, the lowering of the water level in the washing water retaining part 36e of the control cylinder 36 is also stabilized, and the washing water retaining part 36e of the control cylinder 36 is stabilized. The timing at which air flows from the lower part into the washing water retaining part 36e is also stable without variation for each draining operation. The float 76 is also lowered in a stable state, and the valve closing operation is performed in a state where the timing of the valve closing operation in which the valve body 74 closes the drain port 22a is also stable.

According to the washing water tank device 218 according to the third embodiment of the present invention described above, the first switching valve 272 and the second switching valve 273 are each cylindrical when draining in the large washing mode by the drain valve device 234. When the valve body 74 of the drain valve device 234 opens the drain port 22a in a state where each of the first opening 270a and the second opening 270b of the 270 is opened, the washing water in the water storage tank 22 becomes the first of the cylinder 270. The air flows into the internal regions V4 and V5 of the cylindrical body 170 from each of the opening 270a and the second opening 270b.
At this time, each of the first opening 270a and the second opening 270b of the cylinder 270 having the same opening cross section is disposed at substantially the same height position of the opposing side surface portions of the cylinder 270. Since the inner region of the cylinder 270 is partitioned into two inner regions V4 and V5 having the same volume by the partition walls 36g and 36h of the control cylinder 36, the water level in the inner regions V4 and V5 of the cylinder 270 is reduced. The drop is stabilized. As a result, it is possible to stabilize the timing at which air flows from the lower part of the washing water holding part 36e of the control cylinder 36 into the washing water holding part 36e without variation at every drainage operation, and the float 76 also descends in a stable state. Since the valve closing operation is performed in a state where the timing of the valve closing operation for closing the drain port 22a by the valve element 74 is also stable, the amount of the washing water discharged from the drain port 22a can be stabilized.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 6 Conduit 8 Trap pipe 8a Drain trap pipe 8b Drain trap pipe up 8c Drain trap pipe down 10 Rim 12 1st outlet 14 Reservoir DESCRIPTION OF SYMBOLS 16 2nd outlet 18 Washing water tank apparatus 20 Exterior tank 22 Water storage tank 22a Drain outlet 24 Cover body 24a Hand-washing bowl 24b Drain outlet 26 Thermal insulator 28 Engagement member 30 Engagement member 32 Hand-washing curan 34 Drain valve apparatus 36 Control cylinder 36a Side wall 36b Horizontal wall part 36c Hole part 36d Water storage part 36e Washing water storage part 36f Inlet 36g Partition wall (water level lowering stabilization means)
36h Partition wall (water level lowering stabilization means)
36i Small hole 38 Water guide member 40 Wash water supply device 42 Water supply pipe 44 Water supply device float 46 Lever 48 Water supply valve 50 Hand wash water supply pipe 52 Operation device 54 Operation lever 56 Motor 58 Operation button 60 Rotation transmission member 62 First pulling member 64 First 2 lifting member 66 1st ball chain 68 2nd ball chain 70 cylinder 70a opening 70b shaft 70c side wall 70d side wall 72 switching valve 72a receiving portion 74 valve body 76 float 76a float body 76b upper rod-shaped portion 76c lower rod-shaped portion 76d valve Body holding portion 76e Upper surface portion of float body 77 Fixing member 78 Weight 118 Washing water tank device 134 Drain valve device 170 Cylinder 170a Opening portion 170b Shaft 170c Side wall 170d Side wall 218 Washing water tank device 234 Drain valve device 268 Second ball chain 269 Third ball chain 270 Cylindrical body 270a First opening 270b Second opening 270c Shaft 270d Shaft 270e Side wall 270f Side wall 272 First switching valve 272a Receiving portion 273 Second switching valve 273a Receiving portion 278 Weight 279 Weight

Claims (5)

A washing water tank device for storing washing water for washing a toilet,
A water storage tank in which washing water is stored and a drain outlet is formed on the bottom;
A valve body that opens and closes the drain, a water storage section that stores cleaning water, a cleaning water storage section that is provided below the water storage section and stores the cleaning water, and the water storage section and the cleaning water storage section. A through hole, and a float that is provided in the washing water retaining part and moves up and down together with the valve body according to the water level in the washing water retaining part, and opens and closes the hole part. A drainage valve device that lowers the float and the valve body and closes the drainage port when air flows in from the lower portion and the buoyancy of the float is lost;
The drain valve device further includes a cylindrical body having a side surface extending upward from the bottom surface of the water storage tank so as to surround the drain port, and having an upper portion opened and an opening formed in the side surface portion. A switching valve that opens and closes the opening of the cylinder so that the opening cross-sectional area of the opening of the cylinder can be adjusted; and the valve body opens the drain port in a state where the switching valve opens the opening of the cylinder A water level that stabilizes the lowering of the level of the cleaning water in the cylinder when the cleaning water in the water storage tank flows into the cylinder from the opening of the cylinder and is discharged from the drain port. A cleaning water tank apparatus, comprising: a lowering stabilization means.   The cylindrical body includes a first side surface portion in which the opening is formed, a second side surface portion facing the first side surface portion, and the first side surface portion formed in the cylindrical body. Including a first internal region and a second internal region formed in the cylindrical body and including the second side surface portion and different from the first internal region, and the water level lowering stabilizing means includes: The cylinder is provided so as to extend vertically between the inside of the cylinder and the outside of the drain valve device, and divides the inner area of the cylinder into the first inner area and the second inner area. The washing water tank apparatus according to claim 1, wherein the washing water tank apparatus is a wall body.   The cylindrical body includes a first side surface portion in which the opening is formed, a second side surface portion facing the first side surface portion, and the first side surface portion formed in the cylindrical body. Including a first internal region and a second internal region formed in the cylindrical body and including the second side surface portion and different from the first internal region, and the water level lowering stabilizing means includes: The second side surface portion of the cylindrical body and the flush water of the drain valve device so that the volume in the second internal area of the cylindrical body is smaller than the volume in the first internal area of the cylindrical body. The cleaning water tank apparatus according to claim 1, wherein an interval between the retaining portion is set shorter than an interval between the first side surface portion of the cylindrical body and the cleaning water retaining portion of the drain valve device.   The said water level fall stabilization means further sets the space | interval between the 2nd side part of the said cylinder, and the wash water storage part of the said drain valve apparatus so that it may become substantially zero. Water tank equipment.   The side surface portion of the cylindrical body includes a first side surface portion and a second side surface portion facing each other, and an opening formed in the side surface portion of the cylindrical body is a first side surface portion formed in the first side surface portion. 1 and a second opening formed in the second side surface, and the switching valve is configured to adjust the opening cross-sectional area of the first opening of the cylindrical body. A first switching valve that opens and closes one opening, and a second switching valve that opens and closes the second opening so that the opening cross-sectional area of the second opening of the cylindrical body can be adjusted, The water level lowering stabilization means sets the first opening and the second opening of the cylindrical body at substantially the same height position, and sets the first switching valve and the second switching valve. The valve body of the drain valve device opens the drain port in a state where each of the first opening and the second opening of the cylindrical body is opened, and the water storage tank When the cleaning water in the tank flows into the cylinder from the first opening and the second opening of the cylinder and is discharged from the drain, the lowering of the cleaning water level in the cylinder is stabilized. The washing water tank apparatus according to claim 1, wherein

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