JP2008156898A - Toilet-bowl flushing water tank device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet-bowl flushing water tank device with high constructibility, which is equipped with a float member exerting buoyancy for keeping a drain valve opened in the state of being sunk in flushing water, and which accurately adjusts discharge of drainage on the basis of the type of a toilet bowl by accurately adjusting the valve-closing timing of the drain valve. <P>SOLUTION: This toilet-bowl flushing water tank device 100 comprises: a flushing water tank 10 for storing the flushing water for being supplied to the toilet bowl; a drain outlet 36 which is arranged in the bottom 10a of the flushing water tank 10, so as to discharge the flushing water toward the toilet bowl; the drain valve 34 for opening/closing the drain outlet 36; and the float members 35 and 41 which exert the buoyancy for keeping the drain valve 34 opened in the state of being sunk in the flushing water. The float members 35 and 41 are provided with a first float 35, and a second float 41 which is positioned below the first float 35. The second float 41 is equipped with buoyancy switching mechanisms 42 and 61 which can switch between the buoyancy exerting state of exerting the buoyancy for keeping the drain valve 34 opened, and the buoyancy losing state of losing the buoyancy for keeping the drain valve 34 opened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a toilet flushing water tank apparatus having a float member that can be switched between a buoyancy exerted state and a lost state and capable of adjusting a drainage amount.

  2. Description of the Related Art Conventionally, a float member that exhibits buoyancy for keeping a drain valve open while being immersed in flush water is accommodated in a flush water tank used in a toilet.

  FIG. 9 is a cross-sectional view showing an example of such a conventional toilet flushing water tank apparatus 200. As shown in FIG. 9, a conventional toilet flushing water tank apparatus 200 includes a flush water tank 110 that stores flush toilet water, and a drain valve 124 that opens and closes a drain 125 provided at the bottom of the flush water tank 110. And a float 127 integrally formed as a hollow bulging portion on the lower surface of the drain valve 124.

  Moreover, the drain valve 124 has a base end that communicates with the drain port 125 and is pivotally attached to a lower end portion of an overflow pipe 126 that is erected in an L shape. 125 is opened and closed.

  Therefore, in the conventional toilet flushing water tank apparatus 200, when the drain valve 124 is rotated upward by an external operation to open, the drain 125 is opened. At the same time, since the float 127 is immersed in the washing water, the drain valve 124 exhibits buoyancy for maintaining the valve-opened posture as it is. Then, the cleaning water in the cleaning water tank 110 is discharged from the drain 125 to the toilet.

  Even if the water level in the tank drops due to this drainage, the float 127 exhibits buoyancy in the state of being submerged in the wash water until it is exposed on the surface of the water, and the drainage valve 124 integrated with the float 127 remains open. The drainage of the cleaning water is continuously performed from the drain outlet 125. On the other hand, when the float 127 is exposed on the water surface as the water level decreases, the drain valve 124 rotates downward as the buoyancy of the float 127 decreases, and finally the water level drops to a predetermined position. Then, the drain port 125 is closed. During this time, the water level FWL at the time of full water drops to the water level DWL at the time of dead water, and an amount of wash water from the water level FWL to the water level DWL is drained from the drain 125 toward the toilet.

  As described above, in the conventional toilet flushing water tank device 200, once the drain valve 124 is opened by an external operation, the float 127 immersed in the flush water exhibits buoyancy and opens the drain valve 124. It was kept in a state.

  By the way, the amount of flush water from the toilet flushing water tank to the toilet varies depending on the type of toilet bowl used and the capacity of the toilet bowl, and today there are a wide variety of toilet bowl types. Technology is needed to adjust the amount of waste water from the toilet flushing water tank according to the type.

  As shown in Patent Documents 1 and 2, as a toilet flushing water tank device that can adjust the amount of drainage of this kind, the drainage valve is drained by adjusting the float buoyancy and the height of the float in the toilet flushing water tank. What adjusts the valve closing timing which closes a mouth and adjusts the amount of drainage from a toilet flushing water tank is known well.

  The toilet flushing water tank apparatus described in Patent Document 1 has a drain valve and a hollow float formed integrally with the drain valve, and a hole diameter for flush water to flow into the lower part of the float. A plurality of different holes are provided, and the holes can be appropriately selected, and the amount of washing water flowing into the float is changed according to the holes to adjust the size of the buoyancy of the float. As a result, the closing timing of the drain valve is adjusted.

  Moreover, the toilet flushing water tank apparatus of patent document 2 has a flat drain valve, a lifting member for lifting the drain valve, and a float attached to the middle of the lifting member, and the extending direction of the lifting member The height position of the float submerged in the wash water can be adjusted by adjusting the mounting position of the float along the line. If the height position of the float is adjusted to be high, the float is exposed to the surface of the water at a relatively early stage due to the discharge of the washing water, and the buoyancy is reduced. On the other hand, if the float height position is adjusted lower, the float buoyancy action time will be longer due to being immersed in the wash water than when the float position is high. . With this adjustment, the closing timing of the drain valve is adjusted.

Japanese National Patent Publication No. 9-503837 Utility Model Registration No. 3088526

  However, since the toilet flushing water tank apparatus described in Patent Document 1 adjusts the inflow amount of the washing water flowing into the float by the hole diameter of the hole provided in the lower part of the float, the dimensional accuracy with respect to the hole is high. Is required. Therefore, there is a high possibility that there is a dimensional error in the hole diameter, resulting in variations in the amount of washing water flowing into the float, resulting in variations in buoyancy changes. With the float buoyancy, the closing timing of the drain valve could not be adjusted accurately, and as a result, the amount of drainage could not be adjusted accurately.

  Further, the toilet flushing water tank apparatus described in Patent Document 2 is difficult to accurately correspond to the height position of the float suitable for the desired amount of drainage when adjusting the height position of the float. The height position may vary, and the closing timing of the drain valve cannot be adjusted accurately. As a result, the amount of drainage cannot be adjusted accurately. Moreover, in order to obtain a guideline for the optimum float position, for example, even if a plurality of spacers such as sleeves formed with a predetermined length are interposed between the drain valve and the float, there are many types of spacers in between. There is also a problem that the delicate distance needs to be adjusted and the number of parts increases accordingly. Furthermore, in order to adjust the height position of the float, it is necessary to change the float, and there is a problem that the adjustment work becomes complicated.

  Therefore, the present invention accurately adjusts the closing timing of the drain valve by providing a buoyancy switching mechanism capable of switching between a buoyancy exerted state and a lost state in a specific float of the plurality of floats. It is an object of the present invention to provide a toilet flushing water tank apparatus that accurately adjusts the amount of drainage according to the type of toilet bowl and that can be easily adjusted.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a wash water tank for storing wash water to be supplied to a toilet and a bottom of the wash water tank, and the wash water is directed to the toilet. A toilet flushing water tank having a drainage outlet for draining, a drainage valve for opening and closing the drainage outlet, and a float member that exhibits a buoyancy for maintaining the drainage valve in an opened state when immersed in the washing water In the apparatus, the float member includes a first float and a second float positioned below the first float, and the second float exhibits buoyancy for maintaining the drain valve in an open state. It has a buoyancy switching mechanism that can be switched between a buoyancy exerted state and a buoyancy loss state in which the buoyancy for maintaining the drain valve in an open state is lost.

  The invention according to claim 2 includes a pulling member connected to the drain valve and pulling up the drain valve, and the first float is configured to be fixed to a middle portion of the pulling member, and the first The two float is integrally formed as a hollow bulge on the lower surface of the drain valve.

  According to a third aspect of the present invention, the buoyancy switching mechanism is detachably attached to a buoyancy switching hole formed in a peripheral wall of the second float and the buoyancy switching hole, and the buoyancy switching hole is opened. And a blocking member that selectively switches between the second float and the blocking member mounted in the buoyancy switching hole to prevent the washing water from flowing into the second float. The buoyancy is exhibited, and the blocking member is detached from the buoyancy switching hole to allow the washing water to flow into the second float, thereby bringing the second float into a buoyancy loss state. And

  According to a fourth aspect of the present invention, the second float has a holding hole for holding the closing member, and the closing member is connected to a fitting bush fitted to the holding hole. Features.

  The invention according to claim 5 is characterized in that the fitting bush has a through hole communicating with the inside and outside of the second float in a state of being fitted into the holding hole.

  The invention according to claim 6 is characterized in that the second float has a storage hole for storing the blocking member detached from the buoyancy switching hole, separately from the buoyancy switching hole and the holding hole. And

  According to the first aspect of the present invention, the float member that exhibits the buoyancy for maintaining the drain valve in the open state in the state of being submerged in the wash water is provided, and the second float located below the first float is exhibited. By making it possible to switch between the state and the state of buoyancy loss, it is possible to accurately adjust the drainage amount according to the type of toilet bowl by accurately adjusting the closing timing of the drainage valve without requiring float replacement work In addition, there is an effect that the adjustment work is simple.

  According to the invention of claim 2, since the second float is integrally formed as a hollow bulge on the lower surface of the drain valve, there is no need to manufacture the second float and the drain valve as separate parts. There is an effect that the number of points can be reduced and productivity and workability can be improved.

  According to the invention of claim 3, the second float located below the first float can be switched between the buoyancy exerted state and the buoyancy lost state by an easy and simple method of attaching / detaching the closing member to / from the buoyancy switching hole. By doing so, there is an effect that the switching operation can be made very simple.

  According to the invention of claim 4, the closing member is connected to the fitting bush fitted to the holding hole, so that the closing member detached from the buoyancy switching hole can be supported by the second float. Therefore, there is an effect that it is not necessary to carry the closing member when it is attached or detached.

  According to the invention of claim 5, when the fitting bush has a through hole communicating with the inside and outside of the second float in a state fitted to the holding hole, When the fitting bush is fitted into the holding hole, the cleaning water can be caused to flow into the second float from both the buoyancy switching hole and the through hole of the fitting bush, thereby quickly reducing the buoyancy of the second float. There is.

  According to the invention of claim 6, the second float has a storage hole for storing the blocking member detached from the buoyancy switching hole separately from the buoyancy switching hole and the holding hole. Since the detached blocking member can be supported by the second float by the storage hole and stored, there is an effect that the blocking member can be prevented from being lost.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional front view showing a state before draining of a toilet flushing water tank apparatus of the present invention, and FIG. 2 is a sectional front view of the toilet flushing water tank apparatus shown in FIG. 1 during draining.

  As shown in FIG. 1, a toilet flushing water tank device 100 of the present invention is mounted on a toilet (not shown) and adjusts the amount of drainage from the flush water tank according to the type of toilet. The amount of drainage can be adjusted by switching between a small amount of water (for example, 6 L) and a large amount of water (for example, 8 L). The toilet flushing water tank apparatus 100 is stored in the flush water tank 10 for storing flush water to be supplied to the toilet bowl, the water supply apparatus 20 for supplying water into the flush water tank 10, and the flush water tank 10. And a drainage device 30 for discharging water toward the toilet.

  The washing water tank 10 is formed in a substantially flat box shape, and stores water supplied from a water supply source (not shown) and drains the washing water toward the toilet body. 1 and 2, FWL indicates the water level when the cleaning water tank 10 is full, DWL1 indicates the water level during dead water cleaning during the large water amount cleaning, and DWL2 indicates the water level during dead water cleaning during the small water amount cleaning. ing. Here, the water level at the time of dead water refers to the water level when the wash water in the wash water tank 10 is discharged and the water level of the wash water tank 10 becomes the lowest level from the water level at the time of full water.

  Further, a drain port 36 is provided at the center of the bottom 10a of the flush water tank 10, and a drain guide tube 36a is fitted on the inner peripheral surface of the drain port 36 so as to protrude into the tank for cleaning. While guiding the drainage of the wash water in the water tank 10, the upper open end surface 36b of the drain guide cylinder 36a functions as a drain port valve seat that receives an opening / closing action of a drain valve 34 described later.

  The water supply device 20 is erected on the left side in the cleaning water tank 10, and is connected to a water supply pipe 21 having a lower end connected to a water supply source and an upper end of the water supply pipe 21 so as to switch water discharge / stop water toward the cleaning water tank 10. A water supply valve 22 is provided, and a float portion 23 that performs a water discharge / stop water switching operation of the water supply valve 22 by vertical movement according to fluctuations in the water level in the cleaning water tank 10.

  Next, the drainage device 30 will be described. As shown in FIGS. 1 and 2, the drainage device 30 has an operation lever device 31 provided on the side wall of the cleaning water tank 10, one end connected to the operation lever device 31, and the other end in the cleaning water tank 10. A rotary shaft 32 configured to extend substantially horizontally and rotate by operation of the operation lever device 31, a ball chain 33 suspended from the other end of the rotary shaft 32, and a drain valve 34 connected to the lower end of the ball chain 33 The first float 35 is attached to the ball chain 33 while maintaining a predetermined distance above the drain valve 34, and the rotary shaft 32 is rotated by the lever operation of the operation lever device 31 through the ball chain 33. The drain valve 34 connected to the rotating shaft 32 is configured to open.

  Reference numeral 35a denotes a retaining ring 35a as a locking member for fixing the first float 35 to the ball chain 33. A through hole is provided in the center and a part of the periphery of the through hole is cut out so that the ball chain 33 is removed from the cutout portion. It can be inserted and removed and functions as a retaining ring. Reference numeral 35b denotes a sleeve having a spacer function so as to be interposed between the first float 35 and the drain valve 34 with the ball chain 33 inserted thereinto so as to keep the distance therebetween constant.

  Further, in the washing water tank 10, an overflow pipe 37 is disposed on the lateral side along the ball chain 33, and is formed in an L shape in communication with the drain port 36. The excess washing water supplied into the inside 10, that is, the washing water in excess of the water level FWL at the time of full water is released into the overflow pipe 37 and drained from the drain port 36 to the toilet.

  The operation lever device 31 is rotatably supported on the side wall of the cleaning water tank 10 via a predetermined fixture, and opens the drain valve 34 by the rotation operation of the user's operation lever 31a. Reference numeral 31b denotes an operation lever adjusting unit having a damper function for generating a resistance force when the operation lever 31a returns to the original position.

  The drainage valve 34 connected to the lower end of the ball chain 33 includes a valve body 51 formed in a disc shape with an elastic material such as a synthetic resin, and an outer edge seal portion 51a extending around the periphery thereof (see FIG. 3). In addition, a valve support arm 52 projects laterally from the side of the drain valve 34, and the base end of the valve support arm 52 pivots on the peripheral wall of an L-shaped overflow pipe 37 communicating with the drain port 36. Has been. Accordingly, the drain valve 34 opens and closes the drain port 36 while rotating through the valve support arm 52 by the tension and relaxation of the ball chain 33 by the operation of the operation lever 31a. 37a is a pivot protruding from the peripheral wall of the overflow pipe 37, and 52a is a pivot mounting hole at the base end of the valve support arm 52 pivotally attached to the pivot 37a.

    The drain valve 34 is positioned below the first float 35, and a bowl-shaped second float 41 having a hollow bulge is integrally formed on the lower surface of the drain valve 34. That is, the second float 41 is formed so as to protrude in a bowl shape on the lower surface of the disc-shaped drain valve 34. Therefore, the drain valve 34 is closed, that is, the drain valve 34 is drained from the drain port 36. In the state where the upper end face of the guide cylinder 36a is closely closed, the bowl-shaped second float 41 is accommodated in the drainage guide cylinder 36a and does not exhibit buoyancy, and naturally the second float 41 has a hollow bulging portion. Is in a hollow state in which no washing water flows.

    When the drain valve 34 is opened by operating the operation lever device 31, the second float 41 is immersed in the wash water in the wash water tank 10, so that the drain valve 34 is kept open. Although the buoyancy is exerted, when it is necessary to make the buoyancy loss state in order to adjust the drainage amount of the washing water, the buoyancy state of the second float 41 can be appropriately switched to the loss state and vice versa. It is configured to be able to. 1 and 2, the shaded portions in the first float 35 and the second float 41 are in a state in which the first float 35 and the second float 41 are filled with air and bear buoyancy. It is shown that.

  Next, the first float 35 will be described. The first float 35 is attached to the ball chain 33 so as to be positioned above the second float 41 by a retaining ring 35a, and the first float 35 is placed in the wash water. Buoyancy is exerted in the submerged state, and this buoyancy acts on the drain valve 34 via the ball chain 33. The buoyancy that the first float 35 acts on the drain valve 34 is the force by which the wash water pressurizes the drain valve 34 based on the water pressure when the water level in the wash water tank 10 is at the full water level FWL. It is set to be smaller. Therefore, the drain valve 34 when the water is full maintains the closed state with respect to the drain port 36 even when the buoyancy of the first float is acting.

  On the other hand, when the drain valve 34 is once opened (see FIG. 2) by operating the operation lever device 31, the first float 35 is independent of the drain valve 34 without depending on the buoyancy of the second float 41. It is set to exhibit buoyancy that can maintain the valve open state.

  Next, a specific configuration of the second float 41 formed integrally with the drain valve 34 which is a main part of the present invention will be described with reference to FIGS. 3 is an enlarged perspective view of the second float 41 integrated with the drain valve 34 shown in FIG. 1, and shows the buoyancy of the second float 41. FIG. 4 shows the drain valve 34 shown in FIG. 5 is an enlarged front view of the integrated second float 41, FIG. 5 is an enlarged perspective view showing a state of loss of buoyancy of the second float 41 shown in FIG. 3, and FIG. 6 is a second float integrated with the drain valve 34 shown in FIG. FIG. 7 is a diagram showing the operation of the second float 41 in the buoyancy loss state shown in FIG. 5, a sectional front view showing the closed state of the drain valve 34, and FIG. It is a figure which shows operation | movement of the 2nd float 41 of the shown buoyancy loss state, Comprising: It is a cross-sectional front view which shows the valve opening state of the drain valve.

  As described above, the drain valve 34 and the second float 41 are integrally formed using an elastic member such as a synthetic resin. By configuring in this manner, the drain valve 34 and the second float 41 are separated from each other. As a result, the productivity with reduced number of parts and the workability such as assembly and disassembly can be improved.

  First, the significance of the buoyancy of the second float 41 formed integrally with the drain valve 34 as a separate body from the first float 35 will be described. That is, when the second float 41 is submerged in the wash water in the wash water tank 10 in a state where the drain valve 34 is opened by the operation lever device 31 and drainage is performed, the drain valve It is set as the buoyancy display state which exhibited the buoyancy for maintaining the valve-opening state of 34, and the dead water line of this state is for a large amount of water. On the other hand, in the case of changing the amount of wash water discharged from the wash water tank 10 to a small amount of water, the second float 41 is brought into a buoyancy loss state in which the buoyancy for maintaining the open state of the drain valve 34 is lost. Switch to change the float's deadline for a small amount of water. In this regard, when the first float 35 opens the drain valve 34 by an external force, the first float 35 is configured to always exert buoyancy for maintaining the valve open state of the drain valve 34 while immersed in the wash water. And different.

  As already described, the wash water in the wash water tank 10 is drained from the drain port 36 to the toilet with the drain valve 34 open, and first, as the water level in the wash water tank 10 decreases due to this drainage, When the first float 35 located above the second float 41 is exposed on the water surface, the buoyancy is reduced and the water level reaches the dead water line of the first float 35, a small amount of water up to the dead water line is discharged. The drainage stops. On the other hand, when the second float 41 located below the first float 35 is exposed on the water surface from the buoyancy exerted state, the buoyancy of the second float 41 is diminished and the water level reaches the deadline of the second float 41. A large amount of water up to the line is discharged, and the drainage stops.

  As described above, when the second float 41 is switched to the buoyancy exerted state, the opened state of the drain valve 34 by the operation lever device 31 is maintained by the buoyancy of the second float 41 in addition to the buoyancy of the first float 35. Is done. In this case, even if the first float 35 is exposed on the water surface and the buoyancy decreases as the water level decreases due to the drainage, the open state of the drainage valve 34 is maintained by the buoyancy of the second float 41.

  On the other hand, when the second float 41 is switched to the buoyancy loss state, the open state of the drain valve 34 by the operation lever device 31 is maintained by the buoyancy of the first float 35 alone. In this case, the first float 35 is exposed on the water surface as the water level is reduced, and the buoyancy is reduced. When the water level drops to the dead water line of the first float 35, the desired drainage is completed, The valve 34 shifts to a valve closing state.

  In short, when the second float 41 is in a state where buoyancy has been lost, the dead water line is at a higher position and the closing timing of the drain valve 34 is earlier than that in the buoyancy exerted state of the second float 41, and the drain valve 36 is discharged accordingly. The amount of washing water discharged becomes smaller. On the other hand, when the second float 41 is in the buoyancy exerted state, the dead water line is in a low position, and the closing timing of the drain valve 34 is delayed as compared with the case where the second float 41 is in the buoyant loss state. The amount of washing water discharged from 36 increases.

  Next, a specific configuration capable of switching between the buoyancy exerted state and the buoyancy lost state of the second float 41 will be described in detail.

  As shown in FIGS. 3 and 4, the second float 41 has a hollow bowl shape, and its upper end opening is closed by a drain valve 34 and is integrally formed. The peripheral wall 41a is provided with a buoyancy switching hole 42 for switching buoyancy, and a closing member 61 is detachably attached to the buoyancy switching hole 42 so that the buoyancy switching hole 42 is opened and closed. Can be selectively switched. A holding hole 43 is formed at the top of the bowl-shaped lower end of the second float 41, and a fitting bush 63 connected to one end of the arm 62 is fitted into the holding hole 43. A closing member 61 is connected to the other end of the arm 62, and the closing member 61 that has been removed from the buoyancy switching hole 42 and is not used can be fitted into a separately provided storage hole 44 and stored. I can do it.

  The buoyancy switching hole 42 is seen from the bottom portion 10a of the wash water tank 10 in the slightly upper side wall position of the peripheral wall 41a of the second float 41, that is, in the valve open state in which the drain valve 34 is inclined (see FIG. 2). So as to be positioned substantially obliquely upward. That is, the position where the buoyancy switching hole 42 is drilled is the inclination of the drain valve 34 in a state where the buoyancy switching hole 42 is switched to the so-called buoyancy loss state of the second float 41. In some cases, the cleaning water is set at a position where it easily flows into the second float 41 from the buoyancy switching hole 42 (see FIG. 8).

  The closing member 61 is formed in a bottomed cylindrical shape, and an annular protruding edge is formed on each of the opening edge and the bottom outer peripheral edge, and the groove 61a on the cylindrical outer wall surface formed between the protruding edges is buoyant. It is a fitting groove to the switching hole 42. When the closing member 61 is fitted or removed from the buoyancy switching hole 42, the bottom projecting edge of the bottom is pushed inward using the elastic extension of the buoyancy switching hole 42, or is fitted. The second float 41 is switched between the buoyancy exerted state and the buoyancy lost state depending on whether or not the closing member 61 is attached.

  The holding hole 43 is formed in the top peripheral wall of the second float 41 and allows the fitting bush 63 to be fitted. The top position of the second float to which the fitting bush 63 is fitted is substantially obliquely downward with respect to the bottom 10a of the washing water tank 10 when the drain valve 34 is opened (see FIG. 2), that is, when the drain valve 34 is inclined. It is set to be a position facing the.

  The fitting bush 63 is formed in a substantially ring shape having a through hole 64 in the center, and an annular protruding edge is formed between the ring base end outer periphery and the ring tip outer periphery, The circumferential groove 63 a between the protruding edges is fitted while being pushed into the holding hole 43. That is, the substantially ring-shaped fitting bush 63 can be fitted and detached using the elastic expansion of the holding hole 43.

  When the fitting bush 63 is fitted to the top of the bowl-shaped lower surface of the second float 41, the through hole 64 is configured to wash water when the drain valve 34 is open (see FIG. 2), that is, when the drain valve 34 is inclined. The position is substantially obliquely downward with respect to the bottom 10 a of the tank 10. Therefore, when the second float 41 is in a buoyancy loss state, that is, when the blocking member 61 is detached from the buoyancy switching hole 42 and the buoyancy switching hole 42 is opened, the drain valve 34 is in an open valve state. Then, the cleaning water in the cleaning water tank 10 flows into the second float 41 from the through hole 64 and the buoyancy switching hole 42. On the other hand, when the second float 41 is brought into a buoyancy exerting state, that is, when the closing member 61 is fitted into the buoyancy switching hole 42 and the buoyancy switching hole 42 is closed, the drain valve 34 is opened in an inclined manner. In the valve state, the cleaning water in the cleaning water tank 10 does not easily flow into the second float 41 from the holes 64 and 42, and the buoyancy of the second float 41 is exhibited.

  Further, the position of the peripheral wall 41a of the second float 41 that is substantially opposite to the buoyancy switching hole 42, in other words, the drain valve 34 in the open state (see FIG. 2), that is, the bottom of the wash water tank 10 in the inclined state. A storage hole 44 of the closing member 61 is formed at a position facing the 10a direction. As shown in FIGS. 5 and 6, the storage hole 44 is formed in substantially the same shape as the buoyancy switching hole 42, and the closing member 61 detached from the buoyancy switching hole 42 is fitted through the arm 62. The fitting bush 63 is pivotally displaced about the fitting hole 63 to be fitted and stored in the storage hole 44.

  In this way, since the blocking member 61 detached from the buoyancy switching hole 42 can be stored in the storage hole 44, the blocking member 61 detached from the buoyancy switching hole 42 is attached to the second float 41 via the arm 62. It can be supported and stored on the peripheral wall 41a, and it is not necessary to lose or separately store and store the closing member 61, so that the workability can be further improved.

  Since the 2nd float 41 is comprised in this way, if the closure member 61 is mounted | worn with the buoyancy switching hole 42 as shown in FIG.3 and FIG.4, the 2nd float 41 will be in a buoyancy display state. That is, if the buoyancy switching hole 42 is closed by the closing member 61, the second float 41 in the submerged state when the drain valve 34 is changed from the closed state in FIG. 1 to the open state in FIG. 2 by the operation lever device 31. The washing water hardly flows into the buoyancy switching hole 42 and the second float 41 maintains the buoyancy exerted state.

  That is, since this state is a state in which the buoyancy switching hole 42 is closed by the closing member 61, the air in the second float 41 (the shaded portion shown in FIG. 2) flows from the buoyancy switching hole 42 to the second. On the other hand, the amount of the washing water that is not discharged out of the float 41 and flows into the second float 41 from the through hole 64 and the storage hole 44 is suppressed to a relatively small amount, and the buoyancy of the second float 41 is maintained.

  Thus, the through-hole 64 and the storage hole 44 are configured so that the amount of cleaning water flowing into the second float 41 can be suppressed to a relatively small amount by the above-described arrangement position.

  On the other hand, as shown in FIGS. 5 and 6, when the blocking member 61 is detached from the buoyancy switching hole 42 and the buoyancy switching hole 42 is opened, the second float 41 is in a buoyancy loss state. That is, if the drain valve 34 is changed from the closed state of FIG. 7 to the open state of FIG. 8 by the operation lever device 31, the buoyancy of the second float 41 is reduced and the second float 41 is in a buoyancy lost state. At this time, the closing member 61 detached from the buoyancy switching hole 42 is rotated by the arm 62 around the fitting bush 63 and stored in the storage hole 44 at a position substantially opposite to the buoyancy switching hole 42.

  That is, if the buoyancy switching hole 42 is opened, the air in the second float 41 (the shaded portion shown in FIG. 8) flows out of the second float 41 from the buoyancy switching hole 42 as the washing water flows. Thus, the amount of cleaning water flowing into the second float 41 via the buoyancy switching hole 42 and the through hole 64 is relatively large, and the buoyancy of the second float 41 is reduced.

  Further, the through hole 64 is separately provided at a position different from the buoyancy switching hole 42 in order to allow a relatively large amount of washing water to flow into the second float 41 while assisting the amount of washing water flowing into the second float 41. When the second float 41 is in a buoyancy loss state, the wash water is allowed to flow from both the buoyancy switching hole 42 and the through hole 64 in the open state to quickly reduce the buoyancy of the second float 41. Can do.

  As described above, the second float 41 is configured to be able to switch between the buoyancy exerting state and the buoyancy loss state by an easy and simple method of attaching and detaching the closing member 61 to the buoyancy switching hole 42. The hole 42 and the blocking member 61 function as a buoyancy switching mechanism for enabling the second float 41 to be switched between a buoyancy exerted state and a buoyancy lost state.

  Next, a series of draining operations of the toilet flushing water tank apparatus 100 will be described separately for a draining operation at the time of washing with a large amount of water having a flushing water drainage amount of 8L and a draining operation at the time of washing with a small amount of water having 6L. . 2 and 8, the height position BL1 of the first float 35 and the height position BL2 of the second float 41 in the opened state of the drain valve 34 are shown. Here, the height position refers to a height position based on the bottom 10a of the cleaning water tank 10.

  First, the draining operation at the time of washing with a large amount of water will be described. At the time of washing with a large amount of water, the second float 41 is brought into a buoyant state. That is, the buoyancy switching hole 42 is closed by the closing member 61.

  As shown in FIG. 1, the water level of the wash water stored in the wash water tank 10 is the water level FWL when the water is full, and the toilet flushing water tank apparatus 100 closes the drain valve 34. In this state, since the drain valve 34 is in close contact with the upper end surface of the drain guide tube 36a, the second float 41 below the drain valve 34 is stored in the drain guide tube 36a and is submerged in the wash water. Does not produce buoyancy. On the other hand, since the 1st float 35 is the state immersed in washing water, it has produced buoyancy. However, since the first float 35 acts on the drain valve 34 only with a buoyancy smaller than the water pressure of the wash water at the water level FWL when the water is full, the drain valve 34 remains closed even if it receives the buoyancy of the first float 35. Is maintained.

  From this state, when the operation lever 31a is rotated to wash the toilet bowl, the ball chain 33 is pulled upward through the rotation of the rotary shaft 32, and the drain valve 34 is moved upward with the pivots 37a and 37a as the center. And the valve is tilted, that is, the valve is opened with the drain port 36 opened. At the same time, the second float 41 is immersed in the wash water and exhibits buoyancy for maintaining the open state of the drain valve 34. In this state, since the buoyancy switching hole 42 is closed by the closing member 61, the washing water is prevented from flowing into the second float 41 from the buoyancy switching hole 42, and buoyancy is generated.

  As described above, when the drain valve 34 is opened and the wash water is drained from the drain port 36 to the toilet bowl, the level of the wash water in the wash water tank 10 starts to drop from the water level FWL when the water is full.

  Thereafter, until the water level of the cleaning water in the cleaning water tank 10 reaches the height position BL1 of the first float 35, the drain valve 34 is opened by the buoyancy of the first float 35 and the second float 41. Is maintained.

  When the water level of the washing water reaches the height position BL1 of the first float 35 and a part of the first float 35 is exposed from the water surface, the buoyancy of the first float 35 decreases rapidly, but the second float Since 41 still has buoyancy, the open state of the drain valve 34 is maintained by the buoyancy of the second float 41. Thus, since the open state of the drain valve 34 is maintained, drainage of the wash water from the drain port 36 to the toilet is continuously performed, and the water level of the wash water continuously decreases.

  When the water level of the washing water reaches the height position BL2 of the second float 41 and a part of the second float 41 is exposed from the water surface, the buoyancy of the second float 41 decreases rapidly, and the drain port 36 The negative pressure suction force causes the drain valve 34 to rotate downward about the pivot shafts 37a and 37a to close the drain port 36, and drainage stops.

  When the drain valve 34 is closed, drainage of the wash water from the drain port 36 to the toilet is completed, and the level of the wash water in the tank at this time is the water level DWL1 at the time of dead water at the time of washing with a large amount of water. It has become. That is, the amount of drainage at this time is the amount of washing water stored between the FWL at the time of full water and the water level DWL1 at the time of dead water for large water.

  Next, the draining operation at the time of washing with a small amount of water will be described. At the time of washing with a small amount of water, the second float 41 is brought into a buoyancy loss state. That is, the buoyancy switching hole 42 is opened.

  As shown in FIG. 7, the toilet flushing water tank apparatus 100 sets the level of flushing water stored in the flushing water tank 10 as the water level FWL when the drainage valve 34 is closed to the full level. In this state, the drain valve 34 is in close contact with the upper end surface of the drain guide tube 36a and is closed, and the second float 41 below is stored in the drain guide tube 36a and immersed in the washing water. No buoyancy is generated because it is not. On the other hand, the first float 35 generates buoyancy in a state where it is immersed in the washing water. Since the first float 35 has only a buoyancy smaller than a force substantially downward below the pressure applied to the drain valve 34 by the water pressure of the washing water at the water level FWL when the water is full, the drain valve 34 Even if buoyancy is applied, the valve is kept closed.

  From this state, when the operation lever 31a is rotated in order to wash the toilet bowl, the ball chain 33 is pulled upward through the rotation of the rotating shaft 32, whereby the drain valve 34 is centered on the pivot shafts 37a and 37a. As a result, the valve is rotated upward to be in an inclined state, that is, a valve open state in which the drain port 36 is opened. At the same time, the second float is in a state of being submerged in the wash water. However, since the buoyancy enough to maintain the drain valve 34 in the open state has already been lost, the buoyancy is not exerted on the drain valve 34. The reason is that the buoyancy of the second float 41 is reduced because the buoyancy switching hole 42 is opened and the washing water flows into the second float 41. However, since the first float 35 is immersed in the washing water and exhibits buoyancy, the open state of the drain valve 34 is maintained.

  Then, the drainage of the flush water from the drain port 36 to the toilet is continued by the open state of the drain valve 34, and the level of the flush water in the flush water tank 10 is lowered from the water level FWL when full.

  Thus, until the water level of the cleaning water in the cleaning water tank 10 reaches the height position BL1 of the first float 35, the valve open state of the drain valve 34 is maintained due to the buoyancy of the first float 35 described above. Maintained.

  When the water level of the washing water reaches the height position BL1 of the first float 35 and a part of the first float 35 is exposed from the water surface, the buoyancy of the first float 35 decreases rapidly. In addition, since the second float 41 has lost the buoyancy for maintaining the open state of the drain valve 34, the drain valve 34 is moved downward about the pivots 37a and 37a by the negative pressure suction force of the drain port 36. The valve is closed and the drain port 36 is closed.

  When the drain valve 34 is closed, the drain of the wash water from the drain port 36 to the toilet is finished, and the water level of the wash water in the tank at this time is higher than the water level DWL1 at the time of dead water at the time of washing with a large amount of water. Is also the water level DWL2 at the time of dead water at the time of washing the small amount of water above. That is, the amount of drainage at this time is the amount of washing water stored between the water level FWL when full water and the water level DWL2 when dead water for small water amount.

  As described above, the closing timing of the drain valve 34 once opened by the external force is adjusted by switching between the buoyancy exerted state and the buoyancy lost state of the second float 41, and as a result, from the wash water tank 10. The amount of wastewater is adjusted.

  That is, when the second float 41 is in the buoyancy exerted state, the closing timing of the drain valve 34 is delayed compared to when the second float 41 is in the buoyant loss state, and the drain valve 34 is opened and closed. The time to speak increases. A large amount of washing water is drained from the washing water tank 10 within this long time.

  On the other hand, when the second float 41 is in a buoyant loss state, the closing timing of the drain valve 34 is earlier than when the second float 41 is in a buoyant state, and the drain valve 34 is closed after the drain valve 34 is opened. The time to speak decreases. Within this short time, the wash water from the wash water tank 10 is discharged and the amount of drainage is adjusted to be small.

  Thus, the capacity of the cleaning water corresponding to the difference between the water level DWL1 at the time of dead water cleaning at the time of large water volume cleaning and the water level DWL2 at the time of dead water cleaning at the time of small water volume cleaning becomes an adjustment amount of the drainage amount from the cleaning water tank 10, The amount of drainage at the time becomes larger than the amount of drainage at the time of the small amount of water by this adjustment amount.

  Accordingly, a float member (for example, the first float 35 and the second float 41) that exhibits buoyancy for maintaining the drain valve 34 in the open state in a state where the drain valve 34 is submerged in the wash water is provided below the first float 35. By enabling the second float 41 to be switched between a buoyancy exertion state and a buoyancy loss state, the valve closing timing of the drain valve can be accurately adjusted according to the type of the toilet without requiring the float replacement work. It is possible to provide a toilet flushing water tank apparatus that adjusts the amount of discharged water accurately and is easy to adjust and highly workable.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. It can be changed.

  For example, in the present embodiment, the first float 35 may be fixed to the middle portion of the ball chain 33, while the second float 41 may be integrally formed as a hollow bulging portion on the lower surface of the drain valve 34. However, the second float 41 may be configured separately from the drain valve 34, and the second float 41 may be fixed at a position in the middle of the ball chain 33 and below the first float 35. . In this case, the storage hole 44 is not provided in the second float 41. With this configuration, the buoyancy switching hole 42 is closed by the closing member 61, and the through hole 64 of the fitting bush 63 is also closed by a predetermined lid, so that the second float 41 is brought into a buoyancy exerted state. On the other hand, by opening the buoyancy switching hole 42 and the through hole 64 of the fitting bush 63, the second float can be brought into a buoyancy loss state.

  In the present embodiment, the closing member 61 is connected to the fitting bush 63 via the arm 62. However, the closing member 61 and the fitting bush 63 are connected to a string such as a ball chain, for example. You may connect via a shape body. By connecting the two through a string-like body, the closing member 61 can be attached to the buoyancy switching hole 42 and the storage hole 44 without rotating around the fitting bush 63. Switching work between the buoyancy exerted state and the buoyancy lost state of the float 41 is simplified, and the workability of the adjustment work can be improved.

  Further, the storage hole 44 is not an essential configuration for switching between the buoyancy exerted state and the buoyancy lost state of the second float 41. For example, instead of the storage hole 44, a hooking member such as a hook for hooking the closing member 61 detached from the buoyancy switching hole 42 may be disposed on the peripheral wall of the second float 41, A housing recess corresponding to the shape of the closing member 61 may be formed in the peripheral wall of the second float 41 so as to be accommodated in the housing recess.

  In the present embodiment, the float member includes two floats of the first float 35 and the second float 41, and the closing timing of the drain valve 34 is adjusted by the buoyancy switching mechanism of the second float 41. The number of floats of the float member is not limited to two, and may be three or more. In this case, a buoyancy switching mechanism is provided for each float or required float so that the closing timing of the drainage valve 34 can be switched in multiple stages so that the drainage volume setting can be adjusted in multiple stages according to the condition of the toilet. May be.

  The effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments.

It is a figure which shows the outline of the toilet bowl washing water tank apparatus to which this invention is applied, Comprising: It is a cross-sectional front view before drainage. It is a figure for demonstrating the valve opening state of the drain valve with which the toilet bowl washing water tank apparatus shown in FIG. 1 was equipped, Comprising: It is a cross-sectional front view at the time of drainage. It is an enlarged perspective view of the drain valve and the 2nd float with which the toilet bowl washing water tank device shown in Drawing 1 was equipped, and is an explanatory view of the buoyancy display state of the 2nd float. It is an expanded sectional front view of the drain valve and the 2nd float shown in FIG. It is an expansion perspective view for demonstrating the buoyancy loss state of the 2nd float shown in FIG. FIG. 6 is an enlarged side sectional view of the drain valve and the second float shown in FIG. 5. It is a figure for demonstrating operation | movement of the 2nd float of the buoyancy loss state shown in FIG. 5, Comprising: It is a cross-sectional front view which shows the valve closing state of a drain valve. It is a figure for demonstrating operation | movement of the 2nd float of the buoyancy loss state shown in FIG. 5, Comprising: It is a cross-sectional front view which shows the valve opening state of a drain valve. It is a cross-sectional front view which shows the conventional toilet bowl washing water tank apparatus.

Explanation of symbols

10 Washing Water Tank 10a Bottom of Washing Water Tank 33 Ball Chain (Pulling Member)
34 Drain valve 35 First float (float member)
36 Drainage port 41 Second float (float member)
42 Buoyancy switching hole (buoyancy switching mechanism)
43 Holding hole 44 Storage hole 61 Blocking member (buoyancy switching mechanism)
63 Mating bush 64 Through hole 100 Toilet bowl washing water tank device

Claims (6)

A wash water tank for storing wash water for supply to the toilet;
A drain outlet disposed at the bottom of the wash water tank for draining the wash water toward the toilet;
A drain valve for opening and closing the drain port;
In a toilet flushing water tank apparatus having a float member that exhibits buoyancy for maintaining the drain valve in an open state in a state of being immersed in the washing water,
The float member has a first float and a second float located below the first float;
The second float has a buoyancy that can be switched between a buoyancy exerting state in which the buoyancy for maintaining the drain valve in an open state and a buoyancy loss state in which the buoyancy for maintaining the drain valve in an open state is lost. A toilet flushing water tank apparatus having a switching mechanism. A pulling member connected to the drain valve and pulling up the drain valve;
The first float is configured to be fixable to a middle part of the pulling member,
2. The toilet flushing water tank apparatus according to claim 1, wherein the second float is integrally formed as a hollow bulging portion on a lower surface of the drain valve. The buoyancy switching mechanism is detachably attached to a buoyancy switching hole formed in a peripheral wall of the second float and the buoyancy switching hole, and selectively switches between opening and closing of the buoyancy switching hole. A closure member;
The blocking member is attached to the buoyancy switching hole to prevent the washing water from flowing into the second float, thereby bringing the second float into a buoyancy exerting state, and the blocking member being placed in the buoyancy switching hole. The toilet flushing water according to claim 1 or 2, wherein the second float is brought into a buoyancy loss state by allowing the flush water to flow into the second float by being separated from the toilet. Tank equipment. The second float has a holding hole for holding the closing member;
The toilet flushing water tank apparatus according to claim 3, wherein the closing member is connected to a fitting bush that fits into the holding hole.   The toilet flushing water tank apparatus according to claim 4, wherein the fitting bush has a through-hole communicating with the inside and outside of the second float in a state of being fitted into the holding hole.   The second float has a storage hole for storing the blocking member detached from the buoyancy switching hole, separately from the buoyancy switching hole and the holding hole. The toilet flushing water tank apparatus according to any one of 5.