JP2012031609A - Flush tank device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush tank device capable of certainly preventing the freezing of a drain valve in cold districts and restoring the drain valve to the state before washing a toilet bowl.SOLUTION: The flush tank device which stores washing water for washing a toilet bowl includes: a water storage tank, on the bottom of which a drain port is formed, for storing the washing water; a drain valve including a valve body 72 for opening/closing the drain port and a pipe member 74 connected with the valve body and vertically extending; a control cylinder 78 for supporting the pipe member 74 from the outside and guiding the pipe member 74 to move vertically, and for controlling the operation of the drain valve; and an operation part 46 fixed to the flush tank for retaining the drain valve at a predetermined position. The predetermined position where the drain valve is retained by the operation part 46 is configured to be the position where the top surface of the valve body 72 of the drain valve is not in contact with the control cylinder 78.

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 device for storing washing water for washing toilet bowls, Patent Document 1 discloses a drain valve that opens and closes a drain port formed at the bottom of the water storage tank, and stores and stores the washing water. A control cylinder having a water storage section having a small hole formed so as to discharge the wash water at a predetermined small flow rate, and a float provided in the water storage section so as to descend as the water level in the water storage section decreases. And what is equipped with the drainage device which descend | falls in conjunction with the fall of the float and closed the drain outlet is known.
In such a drainage device, in a cold region, the operation handle is fixed at the open position for the purpose of preventing the washing water tank device from freezing, and the drainage port is held by holding the valve body at a position where it contacts the control cylinder. By opening the valve, all the washing water in the washing water tank apparatus is discharged, and the washing water tank apparatus is prevented from freezing.

JP-A-61-72144

  However, if the drainage valve of the drainage device is lifted from the drainage outlet and left for a predetermined time, even if the washing water remaining in the gap between the drainage valve and the control cylinder freezes and the operation handle is returned to the initial position, Since the drain valve and the control cylinder are fixed by freezing of the washing water, there is a problem that the valve body is held in a state where it is pulled up from the drain port and does not return to the initial state.

  Therefore, the present invention solves the above-described problems of the prior art, and can reliably prevent the drain valve from freezing in a cold region and can reliably return to the initial position before toilet flushing. An object of the present invention is to provide a washing water tank device that can be used.

In order to achieve the above object, the present invention is a washing water tank device for storing washing water for washing a toilet, wherein the washing water is stored and a drainage tank is formed on the bottom surface, and the drainage A drain valve having a valve body that opens and closes a mouth and a pipe member that is connected to the valve body and extends in the vertical direction, supports the pipe member from the outside, guides movement in the vertical direction, and controls the operation of the drain valve A control cylinder that is fixed to the wash water tank and holds the drain valve in a predetermined position, and the predetermined position where the drain valve is held by the operation section is a valve body of the drain valve It is the position where the upper surface of this and the said control cylinder do not contact.
In the present invention configured as described above, the predetermined position where the drainage valve is held by the operation unit in the draining operation process in the water storage tank in a cold region is the contact between the upper surface of the drainage valve body and the control cylinder. Since the cleaning water remaining in the gap between the upper surface of the drain valve valve body and the control cylinder is frozen and the drain valve and the control cylinder are not fixed, the drain valve is frozen in a cold region. It can be surely prevented. Since the upper surface of the drainage valve and the control cylinder are not fixed due to freezing when returning to the normal washing process from the draining operation process, the drainage valve can be reliably returned to the state before the toilet bowl washes.

In the present invention, preferably, when the drain valve returns from the predetermined position held by the operation unit to the initial position before toilet flushing, the drain valve moves downward from the predetermined position and then moves downward. Return to the initial position.
In the present invention configured as described above, when the cleaning water remaining in the gap between the pipe member and the control cylinder is frozen and fixed, the drain valve is moved upward from a predetermined position and then moved downward. By returning to the position, the fixation due to freezing can be broken, and the drain valve can be more reliably returned to the state prior to toilet flushing when returning from the draining operation process to the normal washing process.

In the present invention, it is preferable that the drain valve is lifted by a rotation operation of the operation unit to open and close the drain port, and the operation unit is configured to hold a rotation angle of the operation unit at a predetermined angle with respect to an initial position. And the drain valve is held at the predetermined position by holding the operation portion by the restricting means.
In the present invention configured as described above, the drain valve is held at a predetermined position by holding the angle of the operation unit at a predetermined angle with respect to the initial position by the regulating means provided at the operation unit. The water draining process can be executed with a simpler structure.

In the present invention, it is preferable that the restricting unit can release the holding of the operation unit by the restricting unit only when the operation unit is operated in a direction of a rotation angle larger than the predetermined angle with respect to an initial position. It is configured.
In the present invention configured as described above, the restricting means can release the holding of the operating portion by the restricting means only when the operating portion is operated in a direction of a rotation angle larger than a predetermined angle with respect to the initial position. Therefore, the user inevitably moves the drain valve upward from a predetermined position and then moves it downward to return to the initial position. Therefore, if the washing water remaining in the gap between the pipe member and the control cylinder is frozen and stuck, the sticking due to the freezing can be destroyed, and the drain valve is used when returning from the draining operation process to the normal washing process. Can be reliably restored by the state before toilet cleaning.

  According to the washing water tank apparatus of the present invention, it is possible to provide a washing water tank apparatus that can surely prevent the drain valve from freezing in a cold region and can be surely returned to the initial position before toilet flushing. Can do.

Sectional drawing of the flush toilet to which the flush water tank apparatus by 1st Embodiment of this invention was applied. Front sectional drawing which shows the state (initial position) before performing the draining operation | movement of the washing water tank apparatus by 1st Embodiment of this invention. The disassembled perspective view of the disassembled perspective view of the operating device (operating part) of the washing water tank apparatus by 1st Embodiment of this invention. The perspective sectional view which shows the state (state which hold | maintained the operation lever at about 60 degrees) which hold | maintained the drain valve of the washing water tank apparatus by 1st Embodiment of this invention, and one part enlarged view The perspective sectional view which shows the state (state which rotated the operation lever to about 90 degrees) which cancel | released holding | maintenance of the drain valve of the washing water tank apparatus by 1st Embodiment of this invention, and one part enlarged view (A) Sectional drawing of the operation part which shows the state (initial position) before performing the water draining operation by 1st Embodiment of this invention, (b) The state at the time of water draining operation transfer by 1st Embodiment of this invention Sectional view of the operation section showing (the state where the operation lever is rotated by about 75 °), (c) the state during the draining operation according to the first embodiment of the present invention (the state where the operation lever is rotated by about 60 °) FIG. 6D is a cross-sectional view of the operation unit showing a state in which the water draining operation according to the first embodiment of the present invention is released (a state in which the operation lever is rotated by about 90 °).

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, referring to FIG. 1, a flush toilet to which a flush water tank apparatus according to a first embodiment of the present invention is applied will be described. 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). Further, a second water discharge port 16 for discharging the cleaning water supplied from the water conduit 6 is formed above the storage surface W0 of the bowl portion 4, and the cleaning water discharged from the second water discharge port 16 is stored in the second water discharge port 16. A swirling flow that swirls the water stored in the water 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 cross-sectional view showing a state (initial position) before executing the water draining operation 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 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, there is provided a water guide member 25 that guides water flowing from the water discharge port 24 b to the outside of a control cylinder 78 of the drainage device 70 described later.

  Next, the cleaning water tank device 18 includes a cleaning water supply device 34. This washing water supply device 34 is the same as the conventional one, and communicates with a water supply pipe 36 connected to an external water supply source (not shown) such as a water pipe, a water supply device float 38, and a water supply pipe 36. The water storage tank 22 includes a water discharge pipe 40 for discharging cleaning water, a water supply valve 44 connected to the water supply apparatus float 38 via a lever 42, and the like.

  In this embodiment, the cleaning water supply device 34 starts water supply after a predetermined time from the start of drainage. In this embodiment, the water stop water level when the water storage tank 22 is full is made constant at the position (WL) shown in FIG.

  Further, the washing water supply device 34 includes a hand washing water supply pipe 31 for supplying water to the hand washing caran 32. When the supply of the washing water to the toilet bowl is started (at the start of drainage), 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 46 (operation unit) and a drain device 70 that is activated by the operation of the operation device 46.

First, the operation device 46 as an operation unit will be described.
The operation device 46 includes a spindle 50 and an operation lever 48 connected to the spindle 50.

  When the operation lever 48 is rotated (90 degrees) to one side (the front side in the present embodiment), large cleaning described later is started, and when rotated to the other side (the rear side in the present embodiment) (90 degrees). This is a manual operation lever that operates the drainage device 70 so that the small cleaning described later is started. In addition, when a motor or the like is installed in place of the spindle 50 and the large washing button is pushed by the operation button, it rotates in the same direction (front side) as the operation lever 48 and the small washing button is pushed. Then, the drainage device 70 may be operated so as to rotate in the other (back side) direction, which is the same as the operation lever 48, so that large washing or small washing is started.

  A rotation transmission member 54 composed of a wire member, a universal joint, or the like is connected to the operation lever 48 and the spindle 50. A first lifting member 56 and a second lifting member 58 that swing around the rotation transmitting member 54 are attached to the other end side of the rotation transmitting member 54 as the rotation thereof rotates. An upper end portion of the first ball chain 60 and an upper end portion of the second ball chain 62 are respectively attached to the leading ends of the lifting member 56 and the second lifting member 58.

  When the rotation transmitting member 54 is rotated to one side (at the time of large cleaning), only the first lifting member 56 swings to the one side. When only the first ball chain 60 is pulled up and the rotation transmission member 54 is rotated to the other side (at the time of small washing), both the first lifting member 56 and the second lifting member 58 are moved to the other side. It is a mechanical mechanism that swings and pulls up both the first ball chain 60 and the second ball chain 62.

Further, with reference to FIG. 3, the operation device 46 as an operation unit will be described in detail.
FIG. 3 is an exploded perspective view of the operation device (operation unit) of the cleaning water tank device according to the first embodiment of the present invention. The operation device 46 (operation unit) includes an operation lever cover 48 a that forms the appearance of the operation lever 48, an operation lever receiver 48 b, a screw 202 that is connected and fixed to the operation lever receiver 48 b and the spindle 50, and rotation of the spindle 50. A spindle guide 204 that guides the operation, and a spacer 205 and a nut 206 that fit into the screw portion 204b of the spindle guide 204 and fix the operating device 46 to the exterior tank 20 from the inside of the exterior tank 20 are provided.

  A torsion spring 203 is disposed between the operation lever receiving portion 48b and the spindle guide 204, and when the user rotates the operation lever 48, the torsion spring 203 is twisted to generate a restoring force. When the operation lever 48 is released, the operation lever 48 is configured to return to the initial position by the restoring force of the torsion spring 203.

  The operation device 46 (operation unit) is provided with a push button 200 for holding the operation lever 48 at a predetermined angle. The push button 200 is formed with a key-shaped recess 200a at the end, and a flange 200b is formed at the center. One end of the push button 200 is inserted into the hole of the operation lever cover 48a and protrudes out of the cover. Part 200c is formed.

  The concave portion 200a that is the tip of the push button 200 is inserted into the hole portion 48d of the operation lever receiving portion 48b and is formed in a shape that engages with the locking portion 204a of the spindle guide 204. A compression spring 201 is disposed between the flange portion 200b of the push button and the hole portion 48d of the operation lever receiving portion 48b. As will be described in detail later, the recess 200a of the push button 200 and the spindle guide 204 are locked. When the engagement (regulating means) with the portion 204a is released, the push button 200 is configured to return to the initial position by the restoring force of the compression spring 201 in the horizontal direction.

  In this embodiment, the concave portion 200a of the push button 200 is formed in a key shape, but the present invention is not limited to this shape, and any shape can be used as long as it can be engaged with the locking portion 204a of the spindle guide 204. It may be in shape.

Next, the drainage device 70 will be described with reference to FIG.
First, the drainage device 70 of the cleaning water tank apparatus according to the present embodiment includes a drain valve including a valve body 72 and an overflow pipe 74 that is a pipe member, a cylinder 76, a control cylinder 78, a float 80, and an overflow pipe. And a switching valve 84 that opens and closes a later-described opening 76c formed in the cylindrical body 76.

  As shown in FIG. 2, the valve body 72 is fitted into a U-shaped valve body holding portion 74a formed at the lower end portion of the overflow pipe 74, and moves up and down together with the overflow pipe 74 to open and close the drain port 22a. Functions as a drain valve. Further, a recess 74b for holding the fixing member 82 is formed on the side surface of the overflow pipe 74 so as to extend over the entire middle portion in the vertical direction.

  The control cylinder 78 is formed with a substantially cylindrical outer wall 78 a and a cylindrical inner wall 78 b that serves to guide the vertical movement of the overflow pipe 74. Further, as shown in FIG. 2, the control cylinder 78 is formed with an intermediate horizontal wall 78c that allows the washing water to be stored together with the side walls 78a and 78b, and the side wall 78a and 78b and the intermediate horizontal wall 78c store water. A cylinder (water reservoir) 78d is formed.

  Further, a small hole 78e is formed in the outer wall 78a of the water storage cylinder 78d to allow the washing water stored in the water storage cylinder 78d to flow out at a predetermined flow rate. In the outer wall 78a of the control cylinder 78, an inflow port is formed in a portion below the water storage cylinder 78d described above to allow cleaning water on the outer side of the control cylinder 78 to flow into the drain outlet 22a during drainage.

  Next, as shown in FIG. 2, the float 80 is disposed inside the water storage cylinder 78d described above. Above this, a fixing member 82 having a predetermined function is fitted from the side into the above-described recess 74 b of the overflow pipe 74, whereby the fixing member 82 can rotate in the horizontal direction with respect to the overflow pipe 74. On the other hand, it is fixed so that it cannot move in the vertical direction with respect to the overflow pipe 74.

First, the lower end part of the 1st ball chain 60 attached to the 1st raising member 56 mentioned above is attached to the fixing member 82, and it is used in order to raise the overflow pipe 74 at the time of drainage. When the user rotates the operation lever 48, the first ball chain 60 is pulled up. At this time, the valve body 72 of the overflow pipe 74 is vertically adjusted by the head pressure of the washing water stored in the water storage tank 22. Since the holding member 82 is restrained in the downward direction, the fixing member 82 first rotates in the horizontal direction with respect to the overflow pipe 74, and then the overflow pipe 74 moves vertically upward.
With such a configuration, the overflow pipe 74 can be prevented from moving upward in the vertical direction while rotating, and the valve opening operation of the drainage device 70 can be stabilized.

  Next, the fixing member 82 has a function as a stopper that suppresses the rise of the float 80 when the water is full. During drainage, the overflow pipe 74 and the valve body 72 are interlocked with the lowering of the float 80 as described later. It has a function of connecting the overflow pipe 74 and the float 80 so as to descend. The fixing member 82 is formed in a shape and a size so as to sufficiently contact the upper surface of the float 80 so as to have these functions. Here, the buoyancy of the float 80 is set to a buoyancy that does not raise the overflow pipe 74 and the valve body 72 due to the water pressure applied to the valve body 72 when the water is full, and the downward direction applied to the overflow pipe 74 and the valve body 72 when draining. The buoyancy is set to be slightly larger than Note that the float 80 and the overflow pipe 74 may be fixed to each other and always connected.

The valve body 72 normally closes the drain port 22a of the water storage tank 22, and opens the drain port 22a when the first ball chain 60 is pulled up. An opening 76c is formed on the side surface of the cylindrical body 76, and a switching valve 84 is attached to the opening 76c. The switching valve 84 normally opens the opening 76c of the cylindrical body 76, and closes the opening 76c of the cylindrical body 76 when the second ball chain 62 is pulled up.
With such a configuration, when the first and second ball chains 60 and 62 are pulled up, a part above the upper edge of the cylinder 76 in the water storage tank 22 and a part inside the cylinder 76 Is supplied to the toilet body 20 (small cleaning). Further, when only the first ball chain 60 is pulled up, the washing water above the upper edge of the cylinder 76 in the water storage tank 22, inside the cylinder 76, and outside the cylinder 76 is removed. Supplied to the toilet body 2 (large washing).

Next, the water draining operation in the cold region of the washing water tank apparatus according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 2 is a front sectional view showing a state (initial position) before the water draining operation of the cleaning water tank apparatus according to the first embodiment of the present invention, and FIG. 4 is a cleaning water according to the first embodiment of the present invention. FIG. 5 is a perspective sectional view showing a state in which the drain valve of the tank device is held (a state in which the operation lever is held at about 60 °), and a partially enlarged view, FIG. 5 is a cleaning water tank device according to the first embodiment of the present invention. FIG. 6 is a perspective cross-sectional view and a partially enlarged view showing a state in which the holding of the drain valve is released (a state in which the operation lever is rotated by about 90 °).

In a cold region, when the toilet is not used for a certain period, there is a possibility that the washing water stored in the washing water tank device may freeze. Therefore, the user stores the washing water in the water storage tank 22 to prevent freezing. Drain all the water to the outside and empty it. The implementation method of the draining process is described below.
First, when the user performs a water draining operation, the water drain pipe (not shown) connected to the water supply pipe 36 outside the toilet is closed, thereby cleaning the water supply pipe 36 and the cleaning water supply device 34. Water is allowed to flow toward an upstream pipe (not shown) disposed in the non-freezing zone, and water is drained from the water supply pipe 36 and the cleaning water supply apparatus 34.

  Next, in order to drain the washing water from the water storage tank 22, the operation lever 48 is rotated to about 75 degrees toward the large washing side (the front side in this embodiment) while pushing the push button 200. Thereby, only the first ball chain 60 is pulled up, and the valve body 72 opens the drain port 22 a of the water storage tank 22. Thereafter, when the operation lever 48 is returned to the initial position while pressing the push button 200, the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 are engaged, and the operation lever 48 is moved to the initial position (vertical). It is held at a position inclined about 60 degrees with respect to (direction) (FIG. 4). On the other hand, in the tank, the first ball chain 60 is pulled up, and the valve body 72 is held in a state in which the drain port 22a of the water storage tank 22 is opened (FIG. 4). As a result, the wash water in the water storage tank 22 is drained from the drain port 22a of the water storage tank 22 to the bowl portion 4 of the toilet body 2 and the drain trap pipe 8, and can be discharged entirely outside the water storage tank 22. The unplugging operation is completed.

  The position of the held valve body 72 is about 5 mm above the seat surface of the drain port 22 a of the water storage tank 22 and about 40 mm below the intermediate horizontal wall 78 d that is the bottom wall of the water storage cylinder 78 d of the control cylinder 78. Since the upper surface of the valve body 72 and the intermediate horizontal wall 78d of the control cylinder 78 are separated from each other because of being held in position, by any chance, between the upper surface of the valve body 72 and the intermediate horizontal wall 78d of the control cylinder 78 Even if washing water remains, the valve body 72 and the control cylinder 78 are not fixed due to freezing of the remaining water.

  In the above-described embodiment, the predetermined position where the valve body 72 is held is a position about 40 mm below the intermediate horizontal wall 78d which is the bottom wall of the water storage cylinder 78d of the control cylinder 72, but the present invention is limited to this. Even if cleaning water remains in the gap between the upper surface of the valve body 72 and the intermediate horizontal wall 78d of the control cylinder 78, the valve body 72 and the control cylinder 78 are fixed due to freezing of the remaining water. Any position may be used as long as it does not occur.

Next, a method for returning from the state of the water draining process (FIG. 4) to the state before the normal cleaning process (FIG. 2) will be described.
First, in a state where the operation lever 48 is held at an angle of about 60 °, the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 are engaged, so the operation lever 48 returns to the initial position. It is regulated not to rotate in the direction (regulating means). Therefore, the user rotates the operation lever 48 from the state inclined by about 60 ° with respect to the vertical direction (initial position) to the large cleaning side (in this embodiment, the front side). For example, when the operation lever 48 is rotated to about 90 ° with respect to the vertical direction (initial position) (FIG. 5), the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 are engaged, that is, restricted. Means are released. Thereafter, the user releases the operation lever 48, and the operation lever 48 returns to the initial position by the restoring force of the torsion spring 203 between the operation lever receiving portion 48b and the spindle guide 204 (FIG. 2).

  In the tank, when the operation lever 48 is rotated to about 90 °, the valve body 72 is pulled up about 30 mm above the seat surface of the drain port 22a together with the first ball chain 60 and the overflow pipe 74 (FIG. 5). Then, when the user releases the operation lever 48, the first ball chain 60, the overflow pipe 74, and the valve body 72 return to a state in which the valve body 72 closes the drain port 22a of the water storage tank 22 by its own weight. (FIG. 2).

  Thus, when returning from the predetermined position where the overflow pipe 74 and the valve body 72 are held to the initial position before washing the toilet bowl, by moving upward and then moving downward, the overflow pipe 74 and the control cylinder 72 Even if the washing water remaining in the gap with the guide portion is frozen and fixed, the overflow pipe 74 and the valve body 72 are moved upward from a predetermined position and then moved downward to return to the initial position. Fixation due to freezing can be broken. Therefore, when returning from the draining process to the normal cleaning process, the drain valve can be reliably returned to the state before the toilet bowl cleaning.

Next, with reference to FIGS. 6A to 6D, detailed operation of the operation device (operation unit) in the draining operation process according to the first embodiment of the present invention will be described.
Fig.6 (a) is sectional drawing of the operation part which shows the state (initial position) before performing the water draining operation | movement by 1st Embodiment of this invention. FIG. 6B is a cross-sectional view of the operation portion showing a state (a state in which the operation lever is rotated about 75 °) at the time of shifting to the water draining operation according to the first embodiment of the present invention. FIG.6 (c) is sectional drawing of the operation part which shows the state (state which rotated the operation lever about 60 degrees) in execution of the draining operation by 1st Embodiment of this invention. FIG. 6D is a cross-sectional view of the operation unit showing a state in which the water draining operation according to the first embodiment of the present invention is released (a state in which the operation lever is rotated by about 90 °).

  When performing the water draining operation, the user first pushes the operation lever 48 from the initial position to the large washing side (this embodiment) while pushing the push button operation portion 200c protruding outward from the operation lever cover 48a in the left horizontal direction. Then, it is rotated about 75 ° to the near side. Since the user applies a leftward force to the push button 200 during rotation, the left end of the recess 200a of the push button 200 moves while sliding on the first surface portion 204c of the spindle guide 204, and then the first surface. It moves to the 2nd surface part 204d which fell in one step to the left side from 204c (FIG.6 (b)).

  Thereafter, the user returns the operation lever 48 toward the initial position while pressing the button operation unit 200c of the push button 200. When the operation lever 48 returns to a position of about 60 ° with respect to the initial position, the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 are engaged, and the user releases the operation lever 48. However, the operating lever 48 is held in a state where it is tilted by about 60 ° by the engagement. At this time, the compression spring 201 is compressed, and the engagement between the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 is maintained in a stronger state by the restoring force (FIG. 6C). )).

  When returning to the normal state in which toilet bowl cleaning can be performed, the user rotates the operation lever 48 from the position of about 60 ° with respect to the initial position to the large cleaning side (in this embodiment, the front side). Let At this time, even if the operation lever 48 is to be rotated in the direction of the initial position, the operation lever 48 rotates because the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 are engaged. It is regulated so that it cannot be done (regulatory means). When the operation lever 48 is rotated to the large washing side (in this embodiment, the front side), the engagement between the concave portion 200a of the push button 200 and the locking portion 204a of the spindle guide 204 is released (FIG. 6D). The push button 200 naturally returns to the initial position by the restoring force of the compressed compression spring 201.

Thereafter, the user releases the operation lever 48, and the operation lever 48 returns to the initial position by the restoring force of the torsion spring 203 between the operation lever receiving portion 48b and the spindle guide 204 (FIG. 6A). )).
The predetermined angle of the operation lever 48 in each state of the present embodiment described above can be changed as appropriate, and the present invention is not limited to this.

  In the above-described embodiment, the cleaning water tank device stores the cleaning water for cleaning the toilet bowl, and includes a water storage tank in which the cleaning water is stored and a drain port is formed on the bottom surface, and a valve body 72 that opens and closes the drain port. A drain valve having a pipe member 74 that is connected to the valve body and extends in the vertical direction, a control cylinder 78 that supports the pipe member 74 from the outside, guides the movement in the vertical direction, and controls the operation of the drain valve; An operation portion 46 that is fixed to the washing water tank and holds the drain valve in a predetermined position. The predetermined position where the drain valve is held by the operation portion 46 includes an upper surface of a valve body 72 of the drain valve and a control cylinder 78. Is a position that does not touch. In the present invention configured as described above, the predetermined position where the drain valve is held by the operation unit in the draining operation process in the water storage tank in a cold region is the upper surface of the valve body 72 of the drain valve and the control cylinder 78. Since the cleaning water remaining in the gap between the upper surface 72 of the valve body of the drainage valve and the control cylinder 78 is frozen and the drainage valve and the control cylinder are not fixed, the drainage in a cold region is prevented. The valve can be reliably prevented from freezing. Since the upper surface of the drainage valve and the control cylinder are not fixed due to freezing when returning to the normal washing process from the draining operation process, the drainage valve can be reliably returned to the state before the toilet bowl washes.

  Preferably, when the drain valve returns from the predetermined position held by the operation unit 46 to the initial position before cleaning the toilet bowl, the drain valve moves upward from the predetermined position and then moves downward to return to the initial position. . In the present embodiment configured as described above, when the washing water remaining in the gap between the pipe member 74 and the control cylinder 78 is frozen and fixed, the drain valve is moved upward from a predetermined position and then moved downward. By moving and returning to the initial position, the fixation due to freezing can be destroyed, and when returning from the draining operation process to the normal cleaning process, the drain valve can be reliably returned to the state before toilet flushing .

  Further preferably, preferably, the drain valve is pulled up by a rotation operation of the operation unit to open and close the drain port, and the operation unit 46 includes a regulating means for holding the rotation angle of the operation unit 46 at a predetermined angle with respect to the initial position. And the drain valve is held at a predetermined position by holding the operation portion 46 by the restricting means. In the present invention configured as described above, the drain valve is held at a predetermined position by holding the angle of the operation unit at a predetermined angle with respect to the initial position by the regulating means provided at the operation unit. The water draining process can be executed with a simpler structure.

  Preferably, the restricting means is configured to release the holding of the operation part 46 by the restricting means only when the operation part 46 is operated in a direction of a rotation angle larger than the predetermined angle with respect to the initial position. Yes. In the present invention configured as described above, the restricting means can release the holding of the operation portion 46 by the restricting means only when the operation portion is operated in a direction of a rotation angle larger than a predetermined angle with respect to the initial position. Therefore, the user inevitably moves the drain valve upward from a predetermined position and then moves it downward to return to the initial position. Therefore, if the washing water remaining in the gap between the pipe member and the control cylinder is frozen and stuck, the sticking due to the freezing can be destroyed, and the drain valve is used when returning from the draining operation process to the normal washing process. Can be reliably restored by the state before toilet cleaning.

DESCRIPTION OF SYMBOLS 1 Washing-out type flush toilet 6 Water conduit 20 Exterior tank 22 Water storage tank 22a Drain outlet 24 Lid 34 Washing water supply apparatus 46 Operation apparatus (operation part)
48 Operation lever 48a Operation lever cover 48b Operation lever receiving portion 48d Hole 50 Spindle 54 Rotation transmitting member 56 First lifting member 58 Second lifting member 60 First ball chain 62 Second ball chain 70 Drain device 72 Valve element 74 Overflow pipe 74a Valve body holding part 74b Retaining member holding recess 76 Cylinder 76c Cylindrical opening 78 Control cylinder 78d Water storage cylinder 78e Small hole, outlet 80 Float 82 Fixing member 84 Switching valve 200 Push button 200a Push button recess 200b Push Button collar portion 200c Push button operation portion 201 Compression spring 202 Screw 203 Torsion spring 204 Spindle guide 204a Spindle guide locking portion 204b Spindle guide screw portion 205 Spacer 206 Nut

Claims (4)

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 drain valve having a valve body for opening and closing the drain port and a pipe member connected to the valve body and extending in the vertical direction;
A control cylinder that supports the pipe member from the outside, guides the movement in the vertical direction, and controls the operation of the drain valve;
An operation unit fixed to the washing water tank and holding the drain valve in a predetermined position;
The predetermined position where the drain valve is held by the operation portion is a position where the upper surface of the valve body of the drain valve and the control cylinder do not contact each other.
  When the drain valve returns from the predetermined position held by the operation unit to the initial position before toilet flushing, the drain valve moves upward from the predetermined position and then moves downward to return to the initial position. The cleaning water tank apparatus according to claim 1.   The drain valve is lifted by a rotation operation of the operation unit to open and close the drain port, and the operation unit includes a regulation unit that holds a rotation angle of the operation unit at a predetermined angle with respect to an initial position. The washing water tank apparatus according to claim 1 or 2, wherein the drain valve is held at the predetermined position by holding the operation unit by means.   The restricting means is configured to be able to release the holding of the operation part by the restricting means only when the operation part is operated in a direction of a rotation angle larger than the predetermined angle with respect to an initial position. 4. The cleaning water tank apparatus according to claim 3, wherein

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