JP5831703B2 - Wash water supply device, wash water tank device provided with this wash water supply device, and flush toilet equipped with this wash water tank device - Google Patents

Description

  The present invention relates to a washing water supply device, a washing water tank device provided with this washing water supply device, and a flush toilet equipped with this washing water tank device, and in particular, supplies washing water to the washing water tank of a toilet bowl. The present invention relates to a washing water supply device, a washing water tank device provided with the washing water supply device, and a flush toilet equipped with the washing water tank device.

  Conventionally, as a wash water supply device for supplying wash water to a wash water tank of a toilet bowl, for example, as described in Patent Document 1, a water storage portion that is formed in a bowl shape and has an opening formed on the bottom surface thereof. There is a small tank and a float provided in this small tank, and the wash water stored in the small tank is drained from the opening, so that the water level in the small tank falls with the float, and water is supplied in conjunction with it. It is known that the valve opens.

JP 2011-64009 A

However, in the conventional cleaning water supply device described in Patent Document 1, if the water level in the cleaning water tank does not fall below the opening position of the bottom surface of the small tank, the water is stored in the small tank. When the wash water cannot be discharged and the water level in the wash water tank is above the opening position on the bottom of the small tank, the water supply valve opens even if the water supply valve is opened to supply water. There is a problem that can not be. In addition, if the time (delay time) from the start of draining the cleaning water in the cleaning water tank to the start of supplying the cleaning water to the cleaning water tank by the cleaning water supply device is prolonged, the user There is also a problem that it may be misunderstood as a failure of the supply device.
Furthermore, since the amount of washing water stored in the washing water tank has been set to be smaller with the recent saving of washing water used for toilet flushing, after drainage is completed from the stop water level of the washing water in the washing water tank. The difference in water level up to the dead water level (DWL) is also reduced, and how to open and close the water supply valve (water supply / water stop operation) under such a limited level of water level in the wash water tank Whether to do it stably is a requested issue.

  Therefore, the present invention has been made to solve the above-described problems and problems of the prior art, and it is possible to stably discharge the cleaning water in the water storage unit, and to provide a reliable cleaning water supply device. It is intended to provide.

In order to achieve the above object, the present invention provides a washing water supply device for supplying washing water to a toilet flushing water tank, wherein the upstream side is connected to an external water supply source, and is upward from the bottom surface of the washing water tank. A water supply unit comprising: an extended water supply pipe; and a water supply valve provided in the water supply pipe so as to be able to switch between water supply and stop water in the wash water tank supplied from the water supply pipe, and the water supply part A water storage part that stores the wash water, and an opening / closing valve that opens and closes an opening formed in the bottom surface of the water storage part, and is provided in the water storage part. When the water level fluctuates, the float moves up and down according to the fluctuation of the water level in the water storage part, and one is connected to the float and the other is connected to the water supply valve of the water supply part, and the float moves up and down. , A support in the vicinity of the water supply valve A swinging member that swings around the water supply valve to open and close the water supply valve, and the water storage portion has a flat shape whose maximum length in the vertical direction is shorter than the maximum length in the horizontal direction by a predetermined amount And the water supply valve is provided above the water supply pipe and on the side opposite to the float, so that from the fulcrum in the vicinity of the water supply valve to the force point between the swing member and the float. The ratio (leverage ratio L1 / L2) between the distance (L1) and the distance (L2) from the fulcrum in the vicinity of the water supply valve to the operating point of the swing member and the water supply valve is set to a predetermined value or more. It is characterized by being.
In the present invention configured as described above, even if the difference in height between the still water level and the dead water level in the wash water tank is set to be relatively small in order to save the amount of wash water used for washing the toilet bowl, About the water storage part, it is formed in a flat shape whose maximum length in the vertical direction is shorter than the maximum length in the horizontal direction by a predetermined amount, so that the wash water in the water storage part is less than a non-flat shape such as a cubic shape. It is possible to provide a cleaning water supply device that can discharge stably and is reliable. In addition, since the water storage part has a flat shape, the water level in the water storage part cannot be secured after water supply from the water supply part to the washing water tank, and it is difficult to obtain buoyancy that raises the float due to the water level in the water storage part. Even if there is a water supply valve, the distance (L1) from the fulcrum near the water supply valve to the force point between the swing member and the float is sufficiently secured by providing the water supply valve above the water supply pipe and on the side opposite to the float. The ratio (leverage ratio L1 / L2) between the distance (L1) and the distance (L2) from the fulcrum in the vicinity of the water supply valve to the operating point of the swinging member and the water supply valve is greater than a predetermined value. Since the buoyancy that raises the float due to the water level in the water storage part is relatively small and the force acting on the connection part (power point) between the rocking member and the float is relatively small, the rocking member can supply water. Easily swings around a fulcrum near the valve It can be quickly closed the water supply valve Te. Therefore, the height difference between the still water level and the dead water level in the wash water tank can be set smaller, and the amount of wash water required for cleaning the toilet can be set smaller.

In the present invention, preferably, the on-off valve is made of a material having a specific gravity smaller than that of water so as to move up and down depending on the level of the cleaning water in the cleaning water tank.
In the present invention configured as above, since the on-off valve itself is made of a material having a specific gravity smaller than that of water, it can stably move up and down according to the level of the cleaning water in the cleaning water tank. The opening of the water reservoir can be opened and closed stably. In addition, since the space for storing air that causes buoyancy that raises the on-off valve is not required, the size of the on-off valve in the vertical direction can be suppressed. Further, when the water level of the washing water tank rises, the opening / closing valve quickly closes the opening of the water storage section due to the buoyancy due to the water level of the washing water tank, and the water level of the washing water tank crosses the upper edge of the water storage section. The float can be lowered with the interior of the water reservoir empty until just before the water flows into the water reservoir, and when the wash water passes over the upper edge of the water reservoir and the wash water flows into the water reservoir, Can be quickly raised to stop the water supply valve quickly.

In the present invention, preferably, a small hole for discharging the washing water is formed in the bottom surface of the water storage part in addition to the opening.
In the present invention configured as described above, since a small hole for discharging cleaning water is formed on the bottom surface of the water storage unit in addition to the opening, the cleaning water in the water storage unit can be quickly discharged from the opening and small hole. It is possible to reduce the moving distance of the on-off valve for opening the opening compared to the case where a small hole is not formed on the bottom surface of the water storage section. Can be discharged stably. Therefore, a reliable cleaning water supply device can be provided.

In the present invention, preferably, the on-off valve may be formed with a small hole penetrating in the vertical direction at the center thereof.
In the present invention configured as described above, since a small hole penetrating in the vertical direction is formed in the central part of the on-off valve, the washing water in the water storage part can be quickly discharged from the small hole of the on-off valve through the opening. It is possible to reduce the travel distance of the opening / closing valve to open the opening compared to the opening / closing valve that does not have a small hole, and the washing water in the water storage section can be stabilized just by slightly lowering the opening / closing valve. Can be discharged. Therefore, a reliable cleaning water supply device can be provided.

In this invention, Preferably, the said water storage part is attached to the side of the said water supply pipe of the state attached to the said wash water tank so that attachment or detachment is possible.
In the present invention configured as described above, since the water storage section can be detachably attached to the side of the water supply pipe attached to the cleaning water tank, a plurality of water storage sections having different volumes are prepared. Since it can be replaced with a water storage unit that matches the amount of cleaning water inside, the cleaning water in the water storage unit can be discharged stably, and a reliable cleaning water supply device can be provided.

In the present invention, preferably, the water supply pipe includes a convex portion that protrudes outward from a side surface thereof and extends upward from a position at a predetermined height of the water supply pipe, and the water storage portion includes the water supply pipe. A fitting portion that is fitted to the side surface of the water supply pipe, and a surface of the fitting portion that faces the side surface of the water supply pipe is formed in a concave shape so as to be fitted with the convex portion of the water supply pipe and extends in the vertical direction. A formed recess is provided.
In the present invention configured as described above, when the water storage section is fitted into the water supply pipe, the water storage section is attached to the water supply pipe from below and from the side of the predetermined height of the water supply pipe and lifted upward. Thus, since the convex portion of the water supply pipe and the concave portion of the fitting portion of the water storage portion can be fitted to each other, the water storage portion can be replaced with a simple structure in accordance with the amount of cleaning water in the cleaning water tank. Therefore, the cleaning water in the water storage section can be discharged stably, and a reliable cleaning water supply device can be provided.

In the present invention, preferably, the water supply pipe includes a recess that is recessed inward from a side surface thereof and extends upward from a position at a predetermined height of the water supply pipe, and the water storage portion is formed of the water supply pipe. A fitting portion that fits to the side surface is provided, and a surface of the fitting portion that faces the side surface of the water supply pipe is formed so as to be able to fit into a concave portion of the water supply pipe and is formed to extend in the vertical direction. You may provide the convex part made.
In the present invention configured as described above, when the water storage section is fitted into the water supply pipe, the water storage section is attached to the water supply pipe from below and from the side of the predetermined height of the water supply pipe and lifted upward. Thus, since the concave portion of the water supply pipe and the convex portion of the fitting portion of the water storage portion can be fitted to each other, the water storage portion can be replaced with a simple structure according to the amount of cleaning water in the cleaning water tank. Therefore, the cleaning water in the water storage section can be discharged stably, and a reliable cleaning water supply device can be provided.

In the present invention, preferably, the water storage part is formed so as to partially surround the outer peripheral surface of the water supply pipe in a state of being fitted to the water supply pipe, and the shape in the water storage part for containing the washing water. Is formed in a substantially U shape in plan view, and the float is formed so as to match the shape in the water reservoir.
In the present invention configured as described above, the vertical height of the water storage section is reduced by forming the water storage section so as to partially surround the outer peripheral surface of the water supply pipe while being fitted to the water supply pipe. While being able to set, it can attach to a water supply pipe so that attachment or detachment is possible. Also, if the vertical height of the water storage unit is set low and the flat shape is such that the maximum vertical length of the water storage unit is a predetermined amount shorter than the maximum horizontal length, the water level in the water storage unit Since the float's height is relatively low, it becomes difficult to obtain float buoyancy, but the shape inside the water reservoir is generally U-shaped in plan view, and the float is formed to match the shape inside the water reservoir. By doing so, the pressure receiving area of the float can be increased to increase the buoyancy. Therefore, it is possible to stably raise the float and stably stop the water supply valve, and to provide a reliable cleaning water supply device.

Next, the present invention is a cleaning water tank apparatus including the above-described cleaning water supply apparatus.
In this invention comprised in this way, a reliable washing water tank apparatus can be provided.

Next, the present invention is a flush toilet comprising the flush water tank apparatus.
In this invention comprised in this way, a reliable flush toilet can be provided.

  According to the cleaning water supply device of the present invention, the cleaning water in the water storage section can be discharged stably, and reliability can be ensured.

It is a perspective view which shows the state which removed the toilet seat and the toilet lid in the flush toilet to which the washing water tank apparatus provided with the washing water supply apparatus by 1st Embodiment of this invention was applied. It is front sectional drawing which shows the internal structure of the washing water tank apparatus provided with the washing water supply apparatus by 1st Embodiment of this invention. It is a disassembled perspective view which shows the washing water supply apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the washing water supply apparatus by 1st Embodiment of this invention. It is the partial expanded sectional view which expanded partially about the washing water supply device of the state at the time of water supply (at the time of valve opening) by a 1st embodiment of the present invention. It is the partial expanded sectional view which expanded partially about the washing water supply device of the state at the time of water stop (at the time of valve closing) by a 1st embodiment of the present invention. It is a plane sectional view showing a water supply pipe, a small tank, and a float of a washing water supply device by a 1st embodiment of the present invention. It is a top view of the small tank of the washing water supply device by a 1st embodiment of the present invention. It is the elements on larger scale which expanded the fitting part of a water supply pipe and a small float in the washing water supply apparatus by 1st Embodiment of this invention shown in FIG. It is a front view of the small tank of the washing water supply device by a 1st embodiment of the present invention. It is sectional drawing along the XI-XI line of FIG. It is a top view which shows the non-return valve of the washing water supply apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the non-return valve of the washing water supply apparatus by 1st Embodiment of this invention. It is sectional drawing similar to FIG. 11 in the small tank of the washing water supply apparatus by 2nd Embodiment of this invention. It is a top view which shows the non-return valve of the washing water supply apparatus by 2nd Embodiment of this invention. It is front sectional drawing which shows the non-return valve of the washing water supply apparatus by 2nd Embodiment of this invention. It is the elements on larger scale which expanded the fitting part of a water supply pipe and a small float in the washing water supply device by a 3rd embodiment of the present invention.

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

As shown in FIG. 1, reference numeral 1 is a so-called siphon type flush toilet that sucks filth in the bowl portion using a siphon action and discharges it from the drain trap pipe to the outside at once. This flush toilet 1 includes a toilet bowl body 2 made of earthenware. A bowl section 4 and a trap pipe 6 communicating with a lower portion of the bowl section 4 are formed in the toilet bowl body 2.
To the upper edge of the bowl portion 4 of the toilet body 2, flush water supplied from a rim 8 overhanging on the inside and a water conduit (not shown) formed in the rear side of the toilet body 2 is spouted. The first water outlet 10 is formed, and the wash water discharged from the first water outlet 10 descends while swirling to wash the bowl portion 4.

Below the bowl portion 4 is formed a water storage portion 12 whose water storage surface is indicated by a chain line W0. An inlet 6a of a drain trap pipe 6 is opened below the water reservoir 12, and a drain trap pipe 6 behind the inlet 6a is connected to a drain pipe (not shown) through a drain socket (not shown). (Not shown).
Further, a second water discharge port 14 for discharging wash water supplied from a water conduit (not shown) formed in the rear side of the toilet body 2 is formed above the water storage surface W0 of the bowl portion 4. The wash water discharged from the second water discharge port 14 generates a swirling flow that swirls the water stored in the water storage unit 12 in the vertical direction.

A flush water tank device 16 for storing flush water supplied to the toilet bowl 2 is provided on the upper surface on the rear side of the toilet bowl 2.
In addition, although this embodiment demonstrates the example which applied the washing water tank apparatus 16 to the siphon type flush toilet mentioned above, it is not limited to such a siphon type flush toilet, The head of the water in a bowl part The present invention is also applicable to other types of flush toilets such as a so-called flush toilet that flushes filth by flowing water.

Next, the internal structure of the cleaning water tank device 16 will be described with reference to FIG.
FIG. 2 is a front cross-sectional view showing the internal structure of the cleaning water tank apparatus including the cleaning water supply apparatus according to the first embodiment of the present invention. In FIG. 2, the full water level, the still water level, and the dead water level of the water storage tank are indicated by WL0, WL1, and DWL, respectively. In addition, the water level in the water storage tank 18 and the water level in the small tank at which water supply by the cleaning water supply device 22 is started are indicated by WL2 and wl, respectively.
As shown in FIGS. 1 and 2, the flush water tank device 16 includes a reservoir tank 18 for storing flush water for washing the flush toilet 1, and a water conduit for the toilet body 2 is provided at the bottom of the reservoir tank 18. A drainage port 20 communicating with (not shown) is formed, and the wash water in the water storage tank 18 is supplied to a water conduit (not shown) of the toilet body 2. Further, the amount of washing water stored in the water storage tank 18 differs depending on the type of toilet bowl.

  As shown in FIG. 2, in the water storage tank 18 of the cleaning water tank device 16, the cleaning water supply device 22 that is a cleaning water supply device that supplies cleaning water to the water storage tank 18 and the water storage tank 18 store the water. A drainage valve device 24 is provided for opening the drainage port 20 of the washed water and allowing it to flow out to the water conduit (not shown) of the toilet body 2.

  Since the configuration of the drain valve device 24 is the same as the configuration of the conventional drain valve device, a detailed description thereof will be omitted. However, the operation lever 26 attached to the outside of the water storage tank 18 is subjected to large washing or small washing. When the operation wire 28 connected to the operation lever 26 is interlocked to pull up the valve body (not shown) of the drain valve device 24 by performing a rotation operation in a direction in which the predetermined cleaning mode is executed, the drain port 20 Is opened for a predetermined time, and the washing water in the water storage tank 18 is discharged to a fixed amount into a water conduit (not shown) of the toilet body 2.

Next, with reference to FIGS. 2 to 13, details of the cleaning water supply apparatus according to the first embodiment of the present invention will be described.
3 is an exploded perspective view showing the cleaning water supply device according to the first embodiment of the present invention, and FIG. 4 is a front sectional view showing the cleaning water supply device according to the first embodiment of the present invention. In FIG. 4, the full water level, the still water level, and the dead water level of the water storage tank are indicated by WL0, WL1, and DWL, respectively. In addition, the water level in the water storage tank 18 and the water level in the small tank at which water supply by the cleaning water supply device 22 is started are indicated by WL2 and wl, respectively.
FIG. 5 is a partially enlarged cross-sectional view of the cleaning water supply device in a state of water supply (when the valve is open) according to the first embodiment of the present invention, and FIG. 6 is a partially enlarged sectional view of the first embodiment of the present invention. It is the partial expanded sectional view which expanded partially about the washing water supply device of the state at the time of water stop by (at the time of valve closing).
In addition, about FIG.4 and FIG.5, the flow of the water supply in a primary side water supply channel and a secondary side water supply channel is shown by the arrow.

As shown in FIGS. 2 to 6, the cleaning water supply device 22 according to the first embodiment of the present invention is connected to an external water supply source (not shown) and extends upward from the bottom surface 18 a of the water storage tank 18. 30 and a diaphragm-type water supply valve 32 that is provided above and on the side of the water supply pipe 30 and switches between water discharge and stoppage of the wash water supplied from the water supply pipe 30 into the storage tank 18.
The cleaning water supply device 22 includes a small tank 34 that is detachably attached to the water supply pipe 30, a check valve 36 that opens and closes an opening (not shown) formed on the bottom surface of the small tank 34, and the small tank 34. A float 38 that moves up and down in response to fluctuations in the water level in the small tank 34, and one is connected to the float 38 and the other is connected to the water supply valve 32, and the float 38 moves up and down, A swinging member 40 that swings around a fulcrum P in the vicinity of the water supply valve 32 to open and close the water supply valve 32 is provided.
Further, the washing water supply device 22 is fixed to the upper side and the side of the water supply pipe 30 and can adjust the vertical position of the small tank 34 with respect to the water supply pipe 30. The tip of the swinging member 40 is attached so as to be connected to the float 38, and is screwed into the mounting hole 38 a formed in the substantially central portion of the float 38, so that the tip of the swinging member 40 and the float 38 are connected to each other. And an adjustment shaft member 44 capable of adjusting the relative position in the vertical direction.

  As shown in FIGS. 2 to 4, the water supply pipe 30 is attached to the bottom surface 18 a of the water storage tank 18, is connected to a water supply source (not shown) such as an external water supply, and supplies cleaning water into the water storage tank 18. It is supposed to be. A primary side water supply path 30a is formed at the center of the water supply pipe 30 so as to extend in the vertical direction, and a secondary side water supply path 30b is formed inside the water supply pipe 30 and outside the primary side water supply path 30a. The washing water is supplied into the water storage tank 18 from the outlet 30c formed at the lower end of the secondary side water supply passage 30b.

As shown in FIGS. 3 and 4, a water supply passage forming member 46 that forms a water supply passage is provided in the upper end portion of the water supply pipe 30, and the water supply passage 30 of the water supply passage formation member 46 is provided in the water supply passage 30. At the center of the inserted portion, a primary side water supply path 46a connected to the primary side water supply path 30a of the water supply pipe 30 is formed to extend in the vertical direction.
Further, a filter member 48 for filtering the water supply is attached in the primary water supply passage 46 a of the water supply passage forming member 46.

Furthermore, as shown in FIGS. 4 to 6, a secondary side water supply path 46 b having a central axis A <b> 1 extending in the horizontal direction is formed inside the water supply path forming member 46, and this secondary side water supply path 46 b. The downstream side is in communication with the secondary side water supply passage 30 b of the water supply pipe 30.
Further, the diaphragm type water supply valve 32 is interposed between a primary side water supply path 46 a extending in the vertical direction of the water supply path forming member 46 and a secondary side water supply path 46 b extending in the horizontal direction of the water supply path forming member 46. Is provided.
As shown in FIGS. 5 and 6, the water supply valve 32 is attached to the central axis A1 of the valve housing 32a having a central axis A1 extending in the horizontal direction, and the central axis A1 of the hub housing 32a. And a diaphragm 32b movable in the left-right direction in FIG. 6 and a valve body 32c attached to the diaphragm 32b and movable in the left-right direction in FIGS. 5 and 6 integrally with the diaphragm 32b in the valve housing 32a. ing.

  The diaphragm 32b is formed with a bleed hole 32d extending in parallel with the central axis A1, and the bleed hole 32d allows a back pressure chamber located on the side of the primary water supply passage 46a of the water supply passage forming member 46 and the diaphragm 32b. 32e is communicated. A pilot hole 32f is formed in a side portion of the back pressure chamber 32e.

Further, as shown in FIGS. 5 and 6, a swinging member 40 is attached to the side of the valve housing 32a of the water supply valve 32 so as to be swingable around a fulcrum P located at the end of the valve housing 32a. The swing member 40 includes a valve member 40a that opens and closes the pilot hole 32f of the water supply valve 32 by swinging, and the valve member 40a of the swing member 40 opens and closes the pilot hole 32f of the water supply valve 32. Water supply and water stop by the water supply valve 32 can be switched.
In FIG. 5, the water level in the small tank 34 becomes almost zero, and the swing member 40 swings around the fulcrum P so that the float 38 descends to the lowest position. The pilot hole 32f is opened, the valve body 32c moves to the left side of FIG. 5, and the valve seat 46c located at the upstream end of the secondary water supply passage 46b of the water passage forming member 46 is opened (water supply state). ).
On the other hand, in FIG. 6, as a result of the swinging member 40 swinging about the fulcrum P so that the float 38 rises to the highest position, the valve member 40a closes the pilot hole 32f of the water supply valve 32, The body 32c moves to the right side of FIG. 5 and shows a state where the valve seat 46c located at the upstream end portion of the secondary water supply passage 46b is closed (water stoppage state).

  Further, as shown in FIG. 6, the shortest distance (distance from the fulcrum P to the force point Q) L1 from the fulcrum P of the swing member 40 to the vertical center line A2 of the float 38, and the fulcrum of the swing member 40 The ratio (hereinafter referred to as “leverage ratio L1 / L2”) of the shortest distance from P to the center line A3 of the pilot hole 32f (distance from the fulcrum P to the action point R) L2 (hereinafter referred to as “leverage ratio L1 / L2”) is a predetermined value or more (eg, 13.0 or more). ) And is preferably set to 15.0 to 20.0, and most preferably set to 15.2 to 16.0.

Furthermore, in this embodiment, the valve body 32c of the water supply valve 32 is attached to the valve seat 46c of the water supply passage forming member 46 that opens in the horizontal direction in FIG. It is provided on the side of the upper water passage forming member 46. Thereby, in order to save the amount of water used for cleaning the toilet body 2, the height difference H between the full water level WL0 and the dead water level DLW in the water storage tank 18 is set to be relatively small as shown in FIG. As will be described in detail later, the small tank 34 shown in FIG. 10 is formed in a flat shape such that the maximum length h in the vertical direction is a predetermined amount shorter than the maximum length l in the horizontal direction (longitudinal direction). The water level height of the small tank 34 after water supply from 30 to the water storage tank 18 cannot be secured, and the float 38 due to the water level wl (hereinafter “water supply start water level wl”) in the small tank 34 shown in FIGS. Even in a situation where the buoyancy to be raised is difficult to obtain, the shortest distance L1 from the fulcrum P of the swing member 40 to the vertical center line A2 of the float 38 is sufficiently secured, and the lever ratio L1 / L2 is set to a predetermined value. It can be set above It has become to so that.
Further, when the water level in the small tank 34 rises, even if the buoyancy that raises the float 38 due to the water level in the small tank 34 is relatively small and the ascending force acting on the float 38 (power point) is relatively small, the fluctuation is The moving member 40 is easily swung around the fulcrum P so that the water supply valve 32 can be quickly closed.

  Further, as shown in FIGS. 3, 5 and 6, a make-up water housing 50 is provided above the secondary water supply passage 46b extending in the horizontal direction of the water passage forming member 46. A supply water pipe 50a for branching a part of water flowing into the housing 50 from the secondary side water supply path 46b of the water flow path forming member 46 and discharging water into the water storage tank 18 as supply water is provided at the side of the housing 50. Is formed.

Next, details of the small tank 34 and the float 38 will be described with reference to FIGS. 3 and 5 to 10.
FIG. 7 is a plan sectional view showing a water supply pipe, a small tank, and a float of the cleaning water supply apparatus according to the first embodiment of the present invention, and FIG. 8 shows a small tank of the cleaning water supply apparatus according to the first embodiment of the present invention. FIG. 9 is a partially enlarged cross-sectional view in which a fitting portion between a water supply pipe and a small float is enlarged in the cleaning water supply apparatus according to the first embodiment of the present invention shown in FIG.

  As shown in FIGS. 2 to 8, the small tank 34 is detachably attached to the side of the water supply pipe 30 attached to the water storage tank 18, and the volume of the wash water stored in the small tank 34. By preparing a plurality of small tanks having different sizes, the small tank 34 having a volume corresponding to the amount of the washing water in the water storage tank 18 used for toilet flushing can be appropriately changed.

  As shown in FIG. 3, FIG. 4, FIG. 7 and FIG. 9, the water supply pipe 30 includes four convex portions 52 that are integrally formed on the side surface 30d at equal intervals and project outward. 52 is formed to extend in the vertical direction from the bottom surface 18 a of the water storage tank 18 in the water supply pipe 30 to the upper end portion of the water supply pipe 30 from a position at a predetermined height a (see FIG. 4).

  Moreover, as shown in FIGS. 7-9, the small tank 34 is provided with the fitting part 54 formed so that fitting to the convex part 52 of the side surface 30d of the water supply pipe 30 was possible, and this fitting part 54 is substantially the same. When the small tank 34 is attached to the side surface 30d of the water supply pipe 30, it is formed in a semi-cylindrical shape, and a generally U-shaped surface 54a is formed in a plan view of FIG. Forming. In the position facing the convex portion 52 of the side surface 30d of the water supply pipe 30 on the U-shaped surface 54a of the fitting portion 54 of the small tank 34, a concave shape is formed so that the convex portion 52 of the water supply pipe 30 can be fitted. Thus, a recess 56 extending in the vertical direction is formed.

  In addition, when attaching the small tank 34 to the water supply pipe 30, it is located below the lower end of the convex part 52 of the water supply pipe 30, and the area of the water supply pipe 30 in which the convex part 52 is not formed (the water storage shown in FIG. 4). In the section of the water supply pipe 30 below the predetermined height a from the bottom surface 18 a of the tank 18, the fitting portion 54 of the small tank 34 is fitted to the water supply pipe 30 so as to surround almost half of the outer periphery of the water supply pipe 30. Each of the concave portions 56 of the small tank 34 is disposed almost directly below the convex portion 52 of the water supply pipe 30, and then the small tank 34 is lifted upward to fit the convex portion 52 of the water supply pipe 30 and the small tank 34. The small tank 34 is attached to the water supply pipe 30 by fitting with the concave portion 56 of the portion 54.

Next, FIG. 10 is a front view of a small tank of the cleaning water supply apparatus according to the first embodiment of the present invention.
As shown in FIG. 10, the small tank 34 is formed in a substantially horizontally long flat shape whose maximum length h in the vertical direction is shorter by a predetermined amount than the maximum length w in the horizontal direction (longitudinal direction). The ratio of the maximum length h in the vertical direction of the small tank 34 to the maximum length l in the horizontal direction (longitudinal direction) (hereinafter referred to as “aspect ratio h / l”) is set to 15.0 to 20.0. It is preferably set to 1 / 2.25 to 1 / 2.28. As a result, in order to save the amount of water used for cleaning the toilet body 2, the height difference H between the still water level WL0 and the dead water level DWL in the water storage tank 18 shown in FIG. 2 is set to be relatively small. The small tank 34 has a generally vertically long flat shape such that the maximum length h in the vertical direction is a predetermined amount longer than the maximum length l in the horizontal direction (longitudinal direction), or a non-flat shape such as a cubic shape. Compared to the small tank, the vertical movement of the small tank 34 due to the difference in level of the water level in the small tank 34 can be stabilized.

As shown in FIG. 3 and FIG. 7, the float 38 is formed of a resin material, and the outer periphery thereof is formed in a shape that substantially matches the internal shape of the small tank 34 so that it can be accommodated in the small tank 34.
Further, as shown in FIGS. 5 and 6, only the lower part of the float 38 is open, and a buoyancy generator that generates buoyancy by the wash water in the small tank 34 is formed inside the float 38. 38b.
In particular, in the present embodiment, the vertical height of the small tank 34 is set low, and the maximum vertical length h of the small tank 34 is shorter than the maximum length l in the horizontal direction (longitudinal direction) by a predetermined amount. In such a flat shape, since the height of the water level in the small tank 34 becomes relatively low, it becomes difficult to obtain the buoyancy of the float 38, but the outer periphery of the float 38 has the internal shape of the small tank 34. By adopting the combined shape, the pressure receiving area of the buoyancy generator 38b of the float 38 can be increased to increase the buoyancy.

Next, the details of the check valve 36 will be described with reference to FIGS. 5 to 7, 8 and 11 to 13.
11 is a cross-sectional view taken along line XI-XI in FIG. 8, FIG. 12 is a plan view showing a check valve of the cleaning water supply apparatus according to the first embodiment of the present invention, and FIG. It is front sectional drawing which shows the non-return valve of the washing water supply apparatus by 1st Embodiment.

  First, a small hole 34b penetrating in the vertical direction is formed in the bottom surface 34a of the small tank 34, and a portion spaced a predetermined distance radially outward from the small hole 34b penetrates in the vertical direction for attaching the check valve 36. Four mounting holes 34c are formed at equal intervals in the circumferential direction.

Next, as shown in FIGS. 12 and 13, the check valve 36 is formed of a material (for example, a resin material) having a specific gravity smaller than that of water so that it can move up and down depending on the level of the washing water in the water storage tank 18. The small hole 34b of the small tank 34 is attached to the lower side of the small tank 34 so that the small hole 34b can be opened and closed, and can move up and down by buoyancy due to the level of the washing water in the water storage tank 18.
More specifically, the check valve 36 is formed so as to extend upward from the upper surface of the valve portion 36 a and a generally disc-shaped valve portion 36 a that opens and closes the small hole 34 b of the small tank 34. And four support portions 36b to be inserted and attached to the respective attachment holes 34c. In addition, in a state where each support portion 36b of the check valve 36 is mounted in each mounting hole 34c of the corresponding small tank 34, the check valve 36 moves up and down, whereby the support portion 36b is moved to the small tank 34. The front end portion (upper end portion) of the support portion 36b protrudes outward and is located outside the position of the attachment hole 34c of the small tank 34. Therefore, even if the check valve 36 descends to the lowest position with respect to the small tank 34, the tip of the support portion 36b abuts against the bottom surface 34a of the small tank 34 so that the check valve 36 does not fall off. It has become.

  As shown in FIG. 5, when the check valve 36 is lowered, the cleaning water in the small tank 34 can be quickly discharged from the small hole 34b and the mounting hole 34c of the small tank 34. Compared with the case where the small hole 34b is not formed in the bottom surface 34a of the small tank 34, the moving distance of the check valve 36 for opening the small hole 34b and the mounting hole 34c can be reduced. The washing water in the small tank 34 can be stably discharged only by slightly descending.

Furthermore, since the check valve 36 of the cleaning water supply device 22 of the present embodiment is itself formed of a material having a specific gravity smaller than that of water (for example, a resin material), the level of the cleaning water in the water storage tank 18 is determined. Accordingly, the small hole 34b of the small tank 34 can be opened and closed stably. In addition, since the check valve 36 is solid, a space for storing air that causes buoyancy to raise the check valve 36 is not required, and thus the size of the check valve 36 in the vertical direction is suppressed. Can be done.
Furthermore, as shown in FIG. 6, when the water level of the water storage tank 18 rises, the check valve 36 can quickly close the small hole 34 b of the small tank 34 by buoyancy due to the water level of the water storage tank 18. ing. As a result, the float 38 is lowered with the interior of the small tank 34 empty until the water level of the water storage tank 18 passes over the upper edge 34d of the small tank 34 and the cleaning water flows into the small tank 34. When the washing water gets over the upper edge 34d of the small tank 34 and the washing water flows into the water storage section, the float 38 can be quickly raised to quickly stop the water supply valve 32. ing.

Next, referring to FIG. 1 to FIG. 20, the washing water supply device according to the first embodiment of the present invention, the washing water tank device provided with this washing water supply device, and the water washing provided with this washing water tank device. The operation (action) of the toilet bowl will be described.
In the following, the operation wire 28 in the large cleaning mode among the two types of cleaning modes, the large cleaning mode and the small cleaning mode, executed by the cleaning water tank apparatus including the drain valve device according to the first embodiment of the present invention. The amount by which the valve body (not shown) of the drain valve device 24 is lifted is larger than that in the small washing mode, the time for opening the drain port 20 of the water storage tank 18 is long, and dead water in the large washing mode Except for the point that the water level DWL is lower than that in the small cleaning mode, the basic operations of the large cleaning mode and the small cleaning mode are the same, so only the large cleaning mode will be described.

  As shown in FIGS. 2, 4, and 6, in the state before the drainage of the drainage valve device 24, the drainage port 20 of the valve body (not shown) of the drainage valve device 24 is closed, and the water storage tank 18. The initial water level is the full water level WL0 (FIG. 2), and the float member 38 is submerged.

  Next, as shown in FIGS. 2, 4, and 6, when the user operates the operation lever 26, the drain valve device 24 opens the drain port 20 of the water storage tank 18, and the drain valve of the wash water tank device 16. The large flush mode drainage of the flush toilet 1 to the toilet body 2 by the device 24 is started, and the water level in the water storage tank 18 begins to drop. At this time, the float 38 is raised and kept stationary by buoyancy due to the washing water in the small tank 34.

  Next, as shown in FIG. 2, FIG. 4 and FIG. 6, the water level WL2 in the water storage tank 18 where the water level in the water storage tank 18 falls below the full water level WL0 and the water supply by the cleaning water supply device 22 is started and When the water level is higher than the water supply start water level wl in the tank 34, the float 38 still rises and remains stationary, the water level in the water storage tank 18 becomes the still water level WL1, and the water supplied by the washing water supply device 22 is not supplied. Not done.

Next, as shown in FIGS. 2 and 4 to 6, when the water level in the water storage tank 18 falls below the water level WL <b> 2 that is substantially the same as the height position of the bottom surface 34 a of the small tank 34, the water storage tank 18 is washed. The buoyancy acting on the check valve 36 due to water falls below the weight of the check valve 36, the check valve 36 descends, and the small hole 34 b and the mounting hole 34 c on the bottom surface 34 a of the small tank 34 are opened.
As a result, as shown by flow f in FIG. 5, the cleaning water in the small tank 34 flows out from the gap between the small hole 34b and the mounting hole 34c on the bottom surface 34a of the small tank 34, and the water level in the small tank 34 decreases. Begins to drop from the same full water level as the height of the upper edge 34d. At this time, until the water level in the small tank 34 drops to the water supply start water level wl, the buoyancy acting on the buoyancy generating part 38b of the float 38 by the washing water in the small tank 34 exceeds the weight of the float 38. The float 38 is still raised and kept stationary. Here, the water supply start water level wl in the small tank 34 is higher than the water level WL2 in the water storage tank 18.

  Further, when the water level in the small tank 34 is lower than the water supply start water level wl, the buoyancy acting on the buoyancy generating part 38b of the float 38 is less than the weight of the float 38, so the float 38 is lowered. 4 and 5, the swing member 40 swings about the fulcrum P as the float 38 descends, and the valve member 40a of the swing member 40 opens the pilot hole 32f of the water supply valve 32. The valve body 32c moves to the left side of FIG. 5, and the valve seat 46c located at the upstream end of the secondary water supply passage 46b of the water passage forming member 46 is opened (water supply state). Accordingly, the cleaning water is supplied into the water storage tank 18 from the outlet 30c of the secondary side water supply passage 30b of the water supply pipe 30.

Next, as shown in FIGS. 2, 4, and 5, when the water level in the water storage tank 18 falls to the dead water level DWL, the drain valve device 24 closes the drain port 20 of the water storage tank 18. During this time, the water level in the small tank 34 becomes zero, the water supply valve 32 is opened, and the water supply to the water storage tank 18 by the cleaning water supply device 22 is continued, so the water level in the water storage tank 18 is the dead water level. Rise from DWL.
When the water level in the water storage tank 18 rises to the water level WL2, the check valve 36 rises and closes the small hole 34b and the mounting hole 34c of the small tank 34.
At this time, the water level in the small tank 34 is still zero, but when the water level in the water storage tank 18 further rises and passes over the upper edge 34d of the small tank 34 and flows into the small tank 34, the small tank 34 The water level in 34 rises rapidly, the float 38 is raised rapidly, and the water supply valve 32 is stopped rapidly.

According to the washing water supply device 22 according to the first embodiment of the present invention described above, the water stop water level WL1 and the dead water level DWL in the water storage tank 18 are used to save the amount of washing water used for washing the flush toilet 1. Even if the height difference H is set to be relatively small, the vertical length of the small tank 34 is approximately vertically long so that it is a predetermined amount longer than the maximum length l in the horizontal direction (longitudinal direction). Compared to a non-flat small tank such as a flat shape or a cubic shape, the vertical movement of the small tank 34 due to the difference in level of the water level in the small tank 34 can be stabilized. Therefore, the cleaning water in the small tank 34 can be discharged stably, and a reliable cleaning water supply device 22 can be provided.
Further, since the small tank 34 has a substantially horizontally long flat shape, the water level height in the small tank 34 cannot be secured after the water supply from the water supply pipe 30 to the water storage tank 18, and the float 38 due to the water level in the small tank 34 is not provided. Even in a situation in which it is difficult to obtain buoyancy to raise, the valve body 32c of the water supply valve 32 is attached to the valve seat 46c of the water supply passage forming member 46 that opens in the horizontal direction in FIG. Since it is provided on the side of the water passage forming member 46 above the water supply pipe 30, the distance (L 1) from the fulcrum P near the water supply valve 32 to the force point Q between the swinging member 40 and the float 38 is set. It can be secured sufficiently. Therefore, the ratio (leverage ratio L1 / L2) between the distance (L1) and the distance (L2) from the fulcrum P in the vicinity of the water supply valve 32 to the operating point R of the swing member 40 and the water supply valve 32 is a predetermined value. The buoyancy that raises the float 38 due to the water level in the small tank 34 is relatively small, and the force acting on the connecting portion (power point) between the swing member 40 and the float 38 is relatively small. The swinging member 40 can easily swing around the fulcrum P in the vicinity of the water supply valve 32, and the water supply valve 32 can be quickly closed. Furthermore, the height difference H between the still water level WL1 and the dead water level DWL in the water storage tank 18 can be set smaller, and the amount of washing water required for washing the flush toilet 1 can be set smaller.

  Further, according to the cleaning water supply device 22 according to the present embodiment, since the check valve 36 itself is made of a material (for example, a resin material) having a specific gravity smaller than that of water, the level of the cleaning water in the water storage tank 18 is determined. Accordingly, the small hole 34b of the small tank 34 can be opened and closed stably. In addition, since the check valve 36 is solid, a space for storing air that causes buoyancy to raise the check valve 36 is not required, and thus the size of the check valve 36 in the vertical direction is suppressed. Can do. Further, when the water level of the water storage tank 18 rises above the water level WL2, the check valve 36 quickly closes the small hole 34b and the mounting hole 34c of the small tank 34 by buoyancy, and the water level of the water storage tank 18 rises above the small tank 34. The float 38 can be lowered by leaving the inside of the small tank 34 empty until just before the washing water flows into the small tank 34 over the edge 34d. Further, when the cleaning water gets over the upper edge 34d of the small tank 34 and the cleaning water flows into the small tank 34, the float 38 can be quickly raised to quickly stop the water supply valve 32.

  Furthermore, according to the cleaning water supply device 22 according to the present embodiment, the small hole 34b for discharging the cleaning water in the small tank 34 is provided in addition to the mounting hole 34c for mounting the check valve on the bottom surface 34a of the small tank 34. Since it is formed, the cleaning water in the small tank 34 can be quickly discharged from the small hole 34b and the mounting hole 34c, and the small hole 34b is smaller than that in which the small hole 34b is not formed in the bottom surface 34a of the small tank 34. In addition, the travel distance of the check valve 36 for opening the mounting hole 34c can be reduced, and the wash water in the small tank 34 can be discharged stably only by slightly lowering the check valve 36. . Therefore, the reliable cleaning water supply device 22 can be provided.

  Further, according to the cleaning water supply device 22 according to the present embodiment, since the small tank 34 can be detachably attached to the side of the water supply pipe 30 attached to the water storage tank 18, the small tanks 34 having different volumes can be attached. Since a plurality of tanks can be prepared and replaced with small tanks according to the amount of cleaning water in the storage tank 18, the cleaning water in the small tank 34 can be discharged stably, and the reliable cleaning water supply device 22 can be provided. Can be provided.

  Furthermore, according to the cleaning water supply device 22 according to the present embodiment, when the small tank 34 is attached to the water supply pipe 30, the convex part 52 is formed below the lower end of the convex part 52 of the water supply pipe 30. In the section of the water supply pipe 30 that is not (the section of the water supply pipe 30 below the predetermined height a from the bottom surface 18a of the water storage tank 18 shown in FIG. 4), the fitting portion 54 of the small tank 34 is connected to the outer periphery of the water supply pipe 30. The water supply pipe 30 is fitted so as to surround substantially half, and each of the concave portions 56 of the small tank 34 is disposed almost directly below the convex portion 52 of the water supply pipe 30, and then the small tank 34 is lifted upward to supply water. The convex portion 52 of the pipe 30 and the concave portion 56 of the fitting portion 54 of the small tank 34 are fitted to each other so that the small tank 34 can be detachably attached to the water supply pipe 30. Therefore, it is possible to replace the small tank 34 according to the amount of washing water in the water storage tank 18 with a simple structure by the convex portion 52 of the water supply pipe 30 and the concave portion 56 of the fitting portion 54 of the small tank 34. As a result, the cleaning water in the small tank 34 can be discharged stably, and a reliable cleaning water supply device 22 can be provided.

  Further, according to the cleaning water supply device 22 according to the present embodiment, by forming the small tank 34 so as to partially surround the side surface (outer peripheral surface) 30d of the water supply pipe 30 with the small tank 34 fitted to the water supply pipe 30. The vertical height of the small tank 34 can be set low, and the small tank 34 can be detachably attached to the water supply pipe 30. Further, the height of the small tank 34 in the vertical direction is set to be low so that the maximum length h of the small tank 34 in the vertical direction is shorter than the maximum length l in the horizontal direction by a predetermined amount. Since the height of the water level in the small tank 34 is relatively low, it becomes difficult to obtain the buoyancy of the float 38, but the shape in the small tank 34 is formed in a substantially U shape in plan view, and the float 38 By forming 38 so as to conform to the shape in the small tank 34, the pressure receiving area of the buoyancy generating portion 38b of the float 38 can be increased and the buoyancy can be increased. Therefore, the float 38 can be raised stably, the water supply valve 32 can be stably stopped, and the reliable washing water supply apparatus 22 can be provided.

Next, a cleaning water supply device according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 14 is a cross-sectional view similar to FIG. 11 in the small tank of the cleaning water supply apparatus according to the second embodiment of the present invention, and FIG. 15 shows the check valve of the cleaning water supply apparatus according to the second embodiment of the present invention. FIG. 16 is a front sectional view showing a check valve of a cleaning water supply apparatus according to a second embodiment of the present invention.
14 to 16, the same parts as those of the washing water supply apparatus according to the first embodiment of the present invention described above are denoted by the same reference numerals, and description thereof will be omitted.

  First, in the cleaning water supply device according to the second embodiment of the present invention, only the configuration of the small tank and the check valve is the configuration of the small tank and the check valve of the cleaning water supply device according to the first embodiment of the present invention described above. Since the other parts have the same configuration as that of the first embodiment, only a small tank and a check valve different from those of the first embodiment will be described below.

As shown in FIG. 14, in the small tank 134 of the cleaning water supply apparatus 122 according to the second embodiment of the present invention, the small hole in the bottom surface 34a of the small tank 34 of the cleaning water supply apparatus according to the first embodiment of the present invention described above. The thing corresponding to 34b is not formed.
Further, as shown in FIGS. 15 and 16, in the check valve 136 of the cleaning water supply apparatus 122 according to the second embodiment of the present invention, a small hole 158 penetrating in the vertical direction is formed substantially at the center of the valve portion 36a. ing.

  According to the cleaning water supply device 122 according to the second embodiment of the present invention described above, the cleaning water that has flowed out of the small tank 134 through the mounting hole 34c of the check valve 136 quickly also from the small hole 158 of the check valve 136. Since it can be made to flow out, the movement distance of the check valve 136 for opening the mounting hole 34c and the small hole 158 of the check valve 136 is made smaller than that in which the check hole 136 is not formed with the small hole 158. Therefore, the wash water in the small tank 134 can be discharged stably only by slightly lowering the check valve 136. Therefore, a reliable cleaning water supply device 122 can be provided.

Next, with reference to FIG. 17, a cleaning water supply apparatus according to a third embodiment of the present invention will be described.
FIG. 17 is a partially enlarged cross-sectional view similar to FIG. 9 in which the fitting portion between the water supply pipe and the small float is enlarged in the cleaning water supply apparatus according to the third embodiment of the present invention.
In FIG. 17, the same parts as those of the cleaning water supply apparatus according to the first embodiment of the present invention shown in FIG.

  As shown in FIG. 17, in the cleaning water supply device 222 according to the third embodiment of the present invention, the water supply pipe 30 is formed integrally with the side surface 30d at equal intervals and has four recesses 252 protruding outward. Each recess 252 is formed so as to extend in the vertical direction from the bottom surface 18a of the water storage tank 18 in the water supply pipe 30 to the upper end of the water supply pipe 30 from a position at a predetermined height a.

  As shown in FIG. 17, the small tank 234 includes a fitting portion 254 that is formed so as to be fitted in the concave portion 252 of the side surface 30 d of the water supply pipe 30. The fitting portion 254 is formed in a substantially semi-cylindrical shape, and when the small tank 234 is attached to the side surface 30d of the water supply pipe 30, the fitting portion 254 of the fitting portion 254 surrounding the substantially half-circular portion of the side surface 30d of the water supply pipe 30 is provided. A convex portion 256 that protrudes inward and extends in the up-down direction so as to be able to fit into the concave portion 252 of the water supply pipe 30 is formed at a position facing the concave portion 252 of the side surface 30d of the water supply pipe 30 on the letter-shaped surface 54a.

  According to the cleaning water supply device 222 according to the third embodiment of the present invention described above, when the small tank 234 is fitted into the water supply pipe 30, the small tank 234 is placed at a predetermined height from the bottom surface 18a of the water storage tank 18 in the water supply pipe 30. The concave portion 252 of the water supply pipe 30 and the convex portion 256 of the fitting portion 254 of the small tank 234 can be fitted to each other by being attached to the water supply pipe 30 from below and from the side of the position a and lifting upward. Therefore, it can be replaced with a small tank 234 according to the amount of washing water in the water storage tank 18 with a simple structure. Therefore, the washing water in the small tank 234 can be discharged stably, and a reliable washing water supply device 222 can be provided.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 6 Trap line 6a Drain trap line inlet 8 Rim 10 First outlet 12 Reservoir part 14 Second outlet 16 Washing water tank device 18 Reservoir 18a Reservoir bottom DESCRIPTION OF SYMBOLS 20 Drain port 22 Washing water supply apparatus 24 Drain valve apparatus 26 Operation lever 28 Operation wire 30 Water supply pipe 30a Primary side water supply path 30b Secondary side water supply path 30c Outlet of secondary side water supply path 30d Side surface of water supply pipe 32 Water supply valve (Water supply valve)
32a Valve housing 32b Diaphragm 32c Valve body 32d Bleed hole 32e Back pressure chamber 32f Pilot hole 34 Small tank (water storage part)
34a Bottom 34b Small hole 34c Mounting hole (opening)
34d Upper edge of small tank 36 Check valve (open / close valve)
36a Valve portion 36b Support portion 38 Float 38a Mounting hole 38b Buoyancy generating portion 40 Oscillating member 40a Valve member 42 Fixed shaft member 44 Adjustment shaft member 46 Water supply passage forming member 46a Primary side water supply passage 46b Secondary side water supply passage 46c Valve seat 48 Filter member 50 Housing for make-up water 50a Supply water pipe 52 Convex part of water supply pipe 54 Small tank fitting part 54a U-shaped surface of small tank fitting part 56 Small tank concave part

Claims (10)

A cleaning water supply device for supplying cleaning water to a toilet cleaning water tank,
A water supply pipe connected upstream to an external water supply source and extending upward from the bottom surface of the cleaning water tank, and the water supply pipe capable of switching between supply and stop of the cleaning water supplied from the water supply pipe into the cleaning water tank a water supply unit having a water supply valve provided, to,
A water storage section that is fitted in the water supply section and stores wash water;
An on-off valve that opens and closes an opening formed on the bottom surface of the water reservoir,
A float that is provided in the water reservoir, and the open / close valve opens and closes to change the water level in the water reservoir , and the float moves up and down according to the fluctuation of the water level in the water reservoir,
One is connected to the float and the other is connected to the water supply valve of the water supply unit, and the float moves up and down to swing around a fulcrum near the water supply valve to open and close the water supply valve A swing member,
The water storage portion is formed in a flat shape such that the maximum length in the vertical direction is shorter than the maximum length in the horizontal direction by a predetermined amount,
Since the water supply valve is provided above the water supply pipe and on the side opposite to the float, the distance (L1) from the fulcrum in the vicinity of the water supply valve to the power point between the swing member and the float ) And the distance (L2) from the fulcrum in the vicinity of the water supply valve to the operating point of the swing member and the water supply valve (leverage ratio L1 / L2) is set to a predetermined value or more. Washing water supply device characterized by.   2. The cleaning water supply device according to claim 1, wherein the on-off valve is formed of a material having a specific gravity smaller than that of water so that it can move up and down depending on the level of the cleaning water in the cleaning water tank.   The cleaning water supply device according to claim 1 or 2, wherein a small hole for discharging cleaning water is formed on the bottom surface of the water storage section in addition to the opening.   The washing water supply device according to claim 1 or 2, wherein the opening / closing valve has a small hole penetrating in a vertical direction in a central portion thereof.   The washing water supply device according to any one of claims 1 to 4, wherein the water storage section is detachably attached to a side of the water supply pipe in a state of being attached to the washing water tank.   The water supply pipe includes a convex portion that protrudes outward from a side surface thereof and extends upward from a position at a predetermined height of the water supply pipe, and the water storage portion is fitted into a side surface of the water supply pipe. A surface of the fitting portion that faces the side surface of the water supply pipe is provided with a concave portion that is formed in a concave shape so as to be fitted with the convex portion of the water supply pipe and that extends in the vertical direction. The cleaning water supply device according to any one of claims 1 to 5.   The water supply pipe includes a recess that is recessed inward from a side surface thereof and extends upward from a position at a predetermined height of the water supply pipe, and the water storage portion is fitted into a side surface of the water supply pipe. A surface of the fitting portion that faces the side surface of the water supply pipe is provided with a convex portion that is formed in a convex shape so as to be able to fit into the concave portion of the water supply pipe and extends in the vertical direction. The cleaning water supply device according to any one of claims 1 to 5.   The water storage part is formed so as to partially surround the outer peripheral surface of the water supply pipe in a state fitted to the water supply pipe, and the shape of the water storage part for containing cleaning water is substantially The cleaning water supply device according to any one of claims 5 to 7, wherein the cleaning water supply device is formed in a letter shape and the float is formed so as to conform to a shape in the water storage section.   A cleaning water tank device comprising the cleaning water supply device according to any one of claims 1 to 8.   A flush toilet comprising the flush water tank apparatus according to claim 9.

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