JP5721054B2 - Drain valve device and washing water tank device having the same - Google Patents

Description

  The present invention relates to a drain valve device and a flush water tank device having the drain valve device, and more particularly to a drain valve device provided in a flush water tank for supplying flush water to a toilet and a flush water tank device having the drain valve device. .

Conventionally, as a drain valve device provided in a flush water tank for supplying flush water to a toilet, for example, as described in Patent Document 1, a so-called direct movement that moves up and down with respect to the drain port of the flush water tank is disclosed. It is known that a movable drain valve opens and closes a drain outlet to supply and stop washing water from a washing water tank to a toilet.
Such a conventional direct-acting drain valve has a structure in which a valve body, an overflow pipe and a float are integrated, and when the valve is closed, the valve body is brought into contact with the valve seat slowly due to the buoyancy of the float. A drain valve with relatively low closing noise and vibration is used.
On the other hand, in recent washing water tanks, due to the demand for water saving of washing water, it is relatively horizontal to ensure the pressure of washing water in the washing water tank so as not to impair the washing performance even with a small washing water amount. The design is changed from a flat low silhouette type wash water tank that is long in the direction to a high silhouette type wash water tank that is relatively long in the vertical direction, and the water stop water level in the wash water tank is set high. There is also known a configuration in which a part of the washing water in the washing water tank is not supplied to the toilet when it is in water.

Such high silhouette type wash water tanks are also being made more compact in recent years, and parts in the wash water tank are also required to be compact accordingly.
However, the conventional direct-acting drain valve has a problem that it is difficult to apply to a compact washing water tank because the volume occupied by the entire drain valve device is increased by related parts such as a float.

JP-A 61-19082

In addition, along with the downsizing of the washing water tank, if a direct-acting drain valve that does not use a float is used, the buoyancy of the float cannot be used. It becomes easy to be directly affected by the water pressure in the tank.
By the way, the pressure of the wash water flowing out from the drain port always acts as a downward force on the valve body in the drain valve until the drain port is completely closed after the drain valve closing operation is started. In particular, in a state where the drain valve has started to close and the drain valve has started to descend, for example, between the valve body and the storage portion that surrounds the upper and outer peripheral sides of the valve body and stores the valve body In this space, a negative pressure acting in the direction of raising the valve body is generated. And when such a negative pressure falls and the valve body in a storage part falls out of a storage part, when further washing water penetrate | invades in the space between a storage part and a valve body, it instantaneously It has disappeared.

However, due to the reaction caused by the instantaneous disappearance of the negative pressure, a larger downward force acts on the valve body in addition to the water pressure acting downward in advance in the washing water tank. There is a problem that the body is pressed against the drain at a stretch, which causes a closing sound and vibration.
In particular, when the above-described high silhouette type shape is adopted as the wash water tank, the water stop water level in the wash water tank is set higher than that of the low silhouette type shape, and the water level in the wash water tank remains. Since the water pressure acting on the valve body is increased by the washing water being applied, how to suppress the closing sound and vibration when the valve body closes the drain outlet is a serious issue.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and the direction in which the valve body is raised between the valve body during the valve closing operation and the storage portion for storing the valve body. A drain valve device that can suppress the instantaneous disappearance of the negative pressure acting on the valve, and can reduce a closing sound when the valve body closes the drain port, and a washing water tank device having the drain valve device The purpose is to provide.

In order to achieve the above object, the present invention is a drain valve device provided in a wash water tank for supplying wash water to a toilet bowl, and opens and closes a drain port formed on the bottom surface of the wash water tank. A pipe member provided with one end of the valve body, an operation unit connected to the pipe member and moving the pipe member up and down to open and close the drain port, and the pipe member Is inserted, and when the valve body is pulled up to a predetermined or higher position, the guide member that guides the vertical movement of the tube member surrounds and stores the upper side and the outer peripheral side of the valve body. A storage part provided below the guide part, and between the storage part and the bottom surface of the tank, and a conduit for guiding the cleaning water in the cleaning water tank to the drain outlet, the housing part, in its upper surface, the wash water is above It includes a top opening having an opening formed for and from the internal region of the paid portion exits to the outside of the washing water in the tank from the housing part of the outside of the washing water tank into the interior region of the housing part It is characterized by having.
In the present invention configured as described above, on the upper surface of the storage unit, the cleaning water goes out from the inner region of the storage unit into the cleaning water tank outside the storage unit, and the storage unit from the cleaning water tank outside the storage unit. When the valve body is raised (when the valve is opened), the water between the valve body and the storage section can be released to the outside of the storage section by the upper surface opening formed with an opening for entering the interior region . On the other hand, when the valve body is lowered (when the valve is closed), water can easily enter between the valve body and the storage section from the outside of the storage section through the upper surface opening of the storage section. The negative pressure acting in the direction of raising the valve body between the body and the storage part can be suppressed, and such a negative pressure is momentarily generated when the valve body in the storage part descends and comes out of the storage part. Disappearance can be suppressed. In addition, since it is possible to suppress the water pressure that causes the valve body to rapidly drop due to such instantaneous disappearance of the negative pressure, it is possible to suppress the valve body that is being lowered rapidly during the valve closing operation. It is possible to reduce the closing sound that is generated when the drain outlet is closed with momentum. Furthermore, since the load on the valve body and the deformation of the valve body itself due to the water pressure generated by the instantaneous disappearance of the negative pressure described above can be suppressed, the valve body at the time of closing can reliably close the drain port. In addition, the durability of the valve body itself can be improved. In addition, since the inside of the storage unit and the inside of the cleaning water tank communicate with each other via the upper surface opening of the storage unit, the water in the storage unit can relatively freely enter and exit from the upper surface opening in the vertical direction even when the valve body is raised. Therefore, the valve body can rise smoothly with respect to the storage portion, and the load on the valve body and the deformation of the valve body itself can be suppressed. Therefore, the force and torque required for pulling up the valve body by the operation unit can be reduced, and the operability of the valve body by the operation unit can be facilitated. Further, for example, when a driving unit such as an electric motor is employed as the operation unit, power consumption can be reduced.

In the present invention, preferably, the storage portion further includes a side opening portion having an opening formed on a side surface thereof.
In the present invention configured as described above, when the valve body is raised (when the valve is opened), the upper surface opening formed in the upper surface of the storage portion and the side opening formed in the side surface of the storage portion. In this case, water between the valve body and the storage portion at the time of ascent (when the valve is opened) can be more effectively released to the outside of the storage portion. On the other hand, when the valve body is lowered (when the valve is closed), water can easily enter between the valve body and the storage section from the outside of the storage section through the upper surface opening and the side opening of the storage section. Therefore, it is possible to more effectively suppress the negative pressure generated between the valve body and the storage portion and acting in the direction of raising the valve body, and such a negative pressure is generated by the valve body in the storage portion. It is possible to more effectively suppress the momentary disappearance at the time of falling down and coming out of the storage portion. Further, since it is possible to more effectively suppress the water pressure that suddenly lowers the valve body due to such instantaneous disappearance of the negative pressure, the valve that is being lowered during the valve closing operation is prevented. It is possible to more effectively reduce the closing sound that occurs when the body descends with a rapid force and closes the drain. Furthermore, since the load on the valve body and the deformation of the valve body itself due to the water pressure generated by the instantaneous disappearance of the negative pressure described above can be more effectively suppressed, the valve body at the time of closing more reliably secures the drain port. The durability of the valve body itself can be further improved. In addition, since the inside of the storage unit and the inside of the washing water tank communicate with each other through the side opening of the storage unit, the water in the storage unit can relatively freely enter and exit from the side opening in the horizontal direction when the valve body is raised. Therefore, the valve body can rise more smoothly with respect to the storage portion, and the load on the valve body and the deformation of the valve body itself can be more effectively suppressed. Therefore, the force and torque required for pulling up the valve body by the operating portion can be reduced more effectively, and the operability of the valve body by the operating portion can be further facilitated. Further, for example, when a driving unit such as an electric motor is employed as the operation unit, power consumption can be more effectively reduced.

In the present invention, preferably, the upper surface opening of the storage portion forms a plurality of openings on the upper surface of the storage portion.
In the present invention configured as described above, when the valve body is lowered (when the valve is closed), the upper surface opening of the storage unit is opened from the outside of the storage unit by the upper surface opening of the storage unit formed with a plurality of openings. Since water can be more easily infiltrated between the valve body and the storage portion through the valve, negative pressure acting in the direction of raising the valve body between the valve body and the storage portion is more effectively suppressed. In addition, the negative pressure can be more effectively suppressed from disappearing instantaneously when the valve body in the storage portion descends and comes out of the storage portion. Further, since it is possible to more effectively suppress the water pressure that suddenly lowers the valve body due to such instantaneous disappearance of the negative pressure, the valve that is being lowered during the valve closing operation is prevented. It is possible to more effectively reduce the closing sound that occurs when the body descends with a rapid force and closes the drain. Furthermore, since the load on the valve body and the deformation of the valve body itself due to the water pressure generated by the instantaneous disappearance of the negative pressure described above can be more effectively suppressed, the valve body at the time of closing more reliably secures the drain port. The durability of the valve body itself can be further improved.

In the present invention, preferably, the side opening of the storage portion forms a plurality of openings on the side surface of the storage portion.
In the present invention configured as described above, when the valve body is lowered (when the valve is closed), the side opening of the storage portion is formed from the outside of the storage portion when the valve body is lowered (when the valve is closed). Since water can be more easily infiltrated between the valve body and the storage portion through the valve, negative pressure acting in the direction of raising the valve body between the valve body and the storage portion is more effectively suppressed. In addition, the negative pressure can be more effectively suppressed from disappearing instantaneously when the valve body in the storage portion descends and comes out of the storage portion. Further, since it is possible to more effectively suppress the water pressure that suddenly lowers the valve body due to such instantaneous disappearance of the negative pressure, the valve that is being lowered during the valve closing operation is prevented. It is possible to more effectively reduce the closing sound that occurs when the body descends with a rapid force and closes the drain. Furthermore, since the load on the valve body and the deformation of the valve body itself due to the water pressure generated by the instantaneous disappearance of the negative pressure described above can be more effectively suppressed, the valve body at the time of closing more reliably secures the drain port. The durability of the valve body itself can be further improved.

In the present invention, preferably, the plurality of openings of the upper surface opening of the storage unit are arranged symmetrically with respect to the center of the upper surface of the storage unit.
In the present invention configured as described above, the plurality of openings in the upper surface opening of the storage portion are arranged symmetrically with respect to the center of the upper surface of the storage portion, so that the valve body when lowered (when the valve is closed) When the valve descends from the storage unit and comes out, the load on the valve body due to the relatively large water pressure generated in the storage unit can be eliminated in a well-balanced manner. As a result, it is possible to realize a reliable valve closing operation of the valve body without tilting the descending valve body, and it is possible to more effectively suppress deformation of the valve body itself.

In the present invention, preferably, the plurality of openings of the side opening of the storage unit are arranged symmetrically with respect to the center of the upper surface of the storage unit.
In the present invention configured as described above, the plurality of openings of the side opening of the storage portion are arranged symmetrically with respect to the center of the upper surface of the storage portion, so that the valve body when lowered (when the valve is closed) When the valve descends from the storage unit and comes out, the load on the valve body due to the relatively large water pressure generated in the storage unit can be eliminated in a well-balanced manner. As a result, it is possible to realize a reliable valve closing operation of the valve body without tilting the descending valve body, and it is possible to more effectively suppress deformation of the valve body itself.

  Moreover, this invention is a washing water tank apparatus characterized by having the said drain valve apparatus.

  According to the drain valve device of the present invention and the flush water tank device having the drain valve device, the negative valve acts in the direction of raising the valve body between the valve body during the valve closing operation and the storage portion for storing the valve body. The pressure can be prevented from disappearing instantaneously, and the closing sound when the valve body closes the drainage port can be reduced.

1 is a schematic cross-sectional view of a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied. It is the schematic perspective view which looked at the internal structure of the wash water tank apparatus of the use condition which abbreviate | omitted the hand-washing water discharge by one Embodiment of this invention from the back surface. It is the perspective view which looked at the drain valve apparatus of the washing water tank apparatus by one Embodiment of this invention from diagonally upward. It is a top view which shows the storage member and guide member in the drain valve apparatus of the washing water tank apparatus by one Embodiment of this invention. It is a partial front sectional view showing the washing water tank device by one embodiment of the present invention. It is a top view which shows the state which removed the outer cover in the washing water tank apparatus by one Embodiment of this invention. It is sectional drawing seen along the VII-VII line of FIG. It is sectional drawing seen along the VIII-VIII line of FIG. It is the perspective view which looked at the coupling member by one Embodiment of this invention from diagonally upward. It is sectional drawing seen along the XX line of FIG. It is side surface sectional drawing which shows the washing water tank apparatus of the use condition which does not abbreviate | omit the hand-washing water discharge by one Embodiment of this invention. It is the schematic perspective view which looked at the internal structure of the washing water tank apparatus of the use condition which does not abbreviate | omit the hand-washing water discharge by one Embodiment of this invention from the back side. It is the figure which demonstrated schematically operation | movement of the valve body of the drain valve apparatus in the washing water tank apparatus by one Embodiment of this invention.

Hereinafter, with reference to the accompanying drawings, a configuration of a cleaning water tank apparatus in a use state in which hand washing water discharge according to an embodiment of the present invention is omitted will be described.
FIG. 1 is a schematic cross-sectional view of a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied, and FIG. 2 is a flush water tank in use in which hand wash water discharge is omitted according to an embodiment of the present invention. It is the schematic perspective view which looked at the internal structure of the apparatus from the back.

  As shown in FIG. 1, reference numeral 1 denotes a flush toilet. A bowl portion 2 is formed on the front side of the upper part of the flush toilet 1, a water guide channel 4 is formed on the rear side, and a lower side of the water guide channel 4. Are formed with drain trap lines 6 communicating with the bowl portion 2.

  An overhang-shaped rim 8 is formed on the upper edge of the bowl portion 2 of the flush toilet 1, and one or two rim spouts 10 through which flush water is supplied from the water conduit 4 are formed on the rim 8. The washing water descends while swirling so that the bowl part 2 can be washed. Further, a jet spout 12 to which wash water is supplied from the water conduit 4 is formed at the center lower portion of the bowl portion 2, and the wash water is spouted from the jet spout 12 toward the drain trap pipe 6, and the siphon Is generated in a short time.

A flush water tank device 14 according to the present embodiment for storing flush water is provided above the water conduit 4 of the flush toilet 1.
The washing water tank device 14 includes an exterior tank 16 that forms a so-called high silhouette type outer frame that is relatively long in the vertical direction among the washing water tanks. A drain port 16b of an interior tank 28 described later is formed in the bottom surface 16a of the exterior tank 16 so as to penetrate therethrough.

Next, referring to FIG. 1 and FIG. 2, first, the cleaning water tank device 14 in a use state in which hand washing water discharge is omitted will be described.
As shown in FIGS. 1 and 2, the washing water tank device 14 of the present embodiment includes a ceramic outer tank 16, a lid unit 18, a drain valve device 20, an operation device 22, a water supply device 24, And a synthetic resin coupling member 26 made of plastic or the like.

The exterior tank 16 is a so-called high silhouette type wash water tank, and the height of the position of the upper end of the exterior tank 16 is set higher than a so-called low silhouette type wash water tank that is relatively long in the lateral direction. Yes. Inside the exterior tank 16, a resin-made interior tank 28 for storing washing water is provided. The interior tank 28 also has a relatively vertically long high silhouette shape.
A drain port 16 b that communicates with the water conduit 4 of the flush toilet 1 is formed on the bottom surface 28 a of the interior tank 28. In the interior tank 28, a drain valve device 20, an operation device 22, a water supply device 24, and a coupling member 26 are provided. A heat insulating material 29 is provided outside the inner tank 28.

In addition, as shown in FIG. 2, the water level (maximum water level) when the interior tank 28 is full is indicated by WL1, and the water level when the interior tank 28 is stopped is indicated by WL2. In the tank 28, the water level WL1 when the water is full (see FIG. 2) can store water up to a level higher than the water level when the low silhouette type washing water tank is full.
Further, the water stop level WL2 in the interior tank 28 when the valve body 40 of the drain valve device 20 described later closes the drain port 16b and stops the supply of the wash water to the flush toilet 1 (see FIG. 2). ), The water level remains higher than the still water level of the low silhouette type wash water tank, and even when the amount of wash water is reduced compared to the low silhouette type wash water tank, Sufficient cleaning ability can be secured.

As shown in FIG. 1, the lid unit 18 includes an outer lid 30 and an inner lid 32 for non-hand-washing water discharge.
The inner lid 32, which will be described in detail later, is configured such that the coupling member 26 and the outer lid 30 cover the opening above the interior tank 28 and the upper side of the coupling member 26 in a state where the coupling member 26 is attached to the upper end of the interior tank 28. It is attached between.

In addition, the outer lid 30 is detachably fixed to the upper end of the outer tank 16 so as to cover the inner lid 32 attached to the inner tank 28 in a use state in which hand washing water discharge is omitted.
Further, since the outer lid 30 is installed at the upper end of the exterior tank 16 in a usage state where hand washing water discharge is omitted, the upper surface of the outer lid 30 is used in a usage state where hand washing water discharge is not omitted. There are no hand-washing bowls or water discharge pipes for discharging water into the hand-washing bowls, and they are formed in a substantially flat plane. The outer lid 30 is made of a water-resistant material such as pottery that is the same as the exterior tank 16.

Next, the drain valve device 20 of the cleaning water tank 14 according to the present embodiment will be described with reference to FIGS.
FIG. 3 is a perspective view of the drain valve device of the cleaning water tank apparatus according to one embodiment of the present invention as viewed obliquely from above, and FIG. 4 is a diagram of the drain valve device of the cleaning water tank apparatus according to one embodiment of the present invention. It is the top view which looked at a storage member and a guide member from the upper part.

  The drain valve device 20 is a device that supplies flush water in the interior tank 28 to the flush toilet 1, and includes a base member 34, a support member 36, an overflow pipe 38, a valve body 40, a guide member 42, and storage. And a member 44.

First, the base member 34 is attached to the bottom surface 28a of the interior tank 28 to form a drain port 16b, and the drain port 16b communicates with the water conduit 4 of the flush toilet 1.
The base member 34 includes a valve seat 46 that is formed at the upper end of the drain port 16b and can contact the valve body 40. The valve seat 46 is configured such that when the valve body 40 is lowered to the lowest position, the valve body 40 can come into close contact with the drainage port 16b from above.
The base member 34 and the interior tank 28 may be configured such that the valve seat 46 is formed integrally with the bottom surface 28 a of the interior tank 28.

The support member 36 is provided so as to extend upward from the base member 34, and includes a holding portion 36a and a support portion 36b.
The holding portions 36a are columnar members provided at the four corners of the base member 34 and extending upward by a predetermined length, and hold the storage member 44 at a predetermined upper position with respect to the base member 34 at the upper end thereof. .
Further, the support portion 36b is a columnar member that extends upward from the base member 34 by a predetermined length, and lowers the base portion 44a of the storage member 44 held at a predetermined upper position with respect to the base member 34 by the holding portion 36a. Support from the side.
Further, in a state where the storage member 44 is held at a predetermined upper position by the holding portion 36a and the support portion 36b, the cleaning water in the interior tank 28 is supplied to the drain port 16b between the storage member 44 and the base member 34. A water guide channel 47 is formed.

Next, the overflow pipe 38 is a pipe member that extends in a substantially cylindrical shape from the lower end opening 38a that is located at the lower end of the interior pipe 28 and faces the drain 16b of the interior tank 28 to the upper end opening 38b that is located above. And is held by the guide member 42 so as to be slidable in the vertical direction.
The overflow pipe 38 is provided with a convex portion 38c that protrudes radially outward from the outer peripheral surface and extends in the vertical direction at a location where the outer surface is equally divided into four along the circumferential direction.

When the water level of the cleaning water in the interior tank 28 further rises above the full water level WL1 and overflows above the height position of the upper end opening 38b of the overflow pipe 38, the overflowing cleaning water Is drained from the upper end opening 38b of the overflow pipe 38 through the lower end opening 38a to the flush toilet 1 side from the drain 16b of the interior tank 28.
In the present embodiment, as an example, a mode is described in which the drain pipe 16b can be opened and closed by sliding the overflow pipe 38 in the vertical direction. It is not limited to the form, and instead of the overflow pipe 38, a simple pipe member that does not have a function as an overflow pipe may be applied, or a solid rod member may be applied. Good. Moreover, when applying a bar member, it sets so that the function of the refill by the replenishment water mentioned later may not be used.

  Further, the overflow pipe 38 is installed below a makeup water inlet 122a of a makeup water pipe connection portion 78 of the coupling member 26 described later. Therefore, even after the valve body 40 closes the drain port 16b, the replenishing water from the replenishing water connecting portion 78 serves as replenishing water (refill water supply after washing) to the flush toilet 1 and the upper end opening 38b of the overflow pipe 38. The water is drained from the drain port 16b of the interior tank 28 to the flush toilet 1 side through the lower end opening 38a.

  Furthermore, the overflow pipe 38 includes a ball chain mounting portion 38d that protrudes laterally below the upper end opening 38b, and the ball chain 48 extending from the operating device 22 for moving the overflow pipe 38 up and down is a ball chain of the overflow pipe 38. It is attached to the attachment portion 38d.

The valve body 40 is an annular seal member fixed outward from the outer periphery of the lower end opening 38 a of the overflow pipe 38, and is fixed integrally with the overflow pipe 38. Thus, it rises or descends integrally with the overflow pipe 38. When the overflow pipe 38 is lowered to the lowest position in the interior tank 28, the valve body 40 comes into contact with the valve seat 46 and stops, and comes into close contact with the valve seat 46 together with the lower end portion of the overflow pipe 38. It can function as a drain valve for sealing the drain port 16b.
The valve body 40 is made of a flexible material such as rubber or resin so as to be in close contact with the valve seat 46.

Next, the guide member 42 is formed to extend upward from the upper surface of the storage member 44 so as to surround the outside of a part of the overflow pipe 38 that extends in a substantially cylindrical shape in the vertical direction. A part of the overflow pipe 38 is slidably inserted into the guide member 42 so as to guide the vertical movement of the overflow pipe 38 so as not to cause lateral deviation or inclination with respect to the vertical direction.
Specifically, the guide member 42 is formed with four concave portions 42a that are recessed inward in the vertical direction at portions equally divided along the circumferential direction of the inner surface thereof. Since each of the recesses 42a is formed so as to face the respective projections 38c of the overflow pipe 38, when the overflow pipe 38 moves up and down with respect to the guide member 42, a lateral shift or inclination with respect to the vertical direction may occur. Further, the rotation around the central axis in the longitudinal direction of the overflow pipe 38 is suppressed. Therefore, the valve body 40 can be reliably raised and lowered to the center of the storage member 44.

As shown in FIGS. 3 and 4, the storage member 44 is provided below the guide member 42, and when the valve body 40 is pulled up to a predetermined or higher position, the upper side and the outer peripheral side of the valve body 44 are arranged. Surrounding and storing.
The storage member 44 includes a base portion 44a supported by the support member 36, a substantially circular upper surface portion 44b as viewed from above, and a side surface portion 44c extending downward from the outer periphery of the upper surface portion 44b and formed in a substantially cylindrical shape. And.
The base 44 a of the storage member 44 is fixed in a substantially horizontal state by a support member 36 at a position above the base member 34 by a predetermined distance.

The upper surface portion 44b of the storage member 44 surrounds the upper side of the valve body 40 when the valve body 40 is pulled up to a position above the base portion 44a.
Further, the side surface portion 44c of the storage member 44 surrounds the outer peripheral side of the valve body 40 when the valve body 40 is pulled up to a position above the base portion 44a. Furthermore, in the state where the valve body 40 is raised most, the valve body 40 comes close to the upper surface portion 44b of the storage member 44 without contacting.

  The side surface portion 44c of the storage member 44 has an inner diameter slightly larger than the outer diameter of the valve body 40, and when the valve body 40 is pulled up to a position above the base portion 44a, A slight gap is formed between the side surface portion 44 c and the outer periphery of the valve body 40.

As shown in FIGS. 3 and 4, eight openings 52 are formed in the upper surface portion 44 b of the storage member 44 at positions symmetrical to the center (center axis) A of the upper surface portion 44 b of the storage member 44. ing.
Further, as illustrated in FIGS. 3 and 4, eight openings 54 are formed in the side surface portion 44 c of the storage member 44 at positions symmetrical with respect to the center A of the upper surface portion 44 b of the storage member 44.

Next, the operation device 22 will be described with reference to FIGS. 2 and 5. FIG. 5 is a partial front sectional view showing a cleaning water tank apparatus according to an embodiment of the present invention.
As shown in FIGS. 2 and 5, the operation device 22 includes an operation lever 22a, a rotation shaft 22b, and a rotation drive device 22c. The rotation drive device 22c is an electric motor for rotating the rotation shaft 22b. And is disposed on the upper outer side of the washing water tank 16.

Further, the rotation shaft 22b has a base end portion held by the rotation driving device 22c, and extends substantially horizontally from the base end portion to the tip end portion.
Further, an operation lever 22a is fixed to the tip of the rotation shaft 22b, and the rotation shaft 22b and the operation lever 22a rotate together within a predetermined rotation angle range by driving the rotation drive device 22c, and the operation lever 22a. Since the ball chain 48 attached to the operation lever rises or falls according to the rotation direction of the lens, the overflow pipe 38 to which the ball chain 48 is attached moves up or down.

Next, details of the water supply device 24 will be described.
As shown in FIG. 2, the water supply device 24 includes a water supply pipe 56, a water supply valve 58, a branch part 60, a water discharge pipe 62, a replenishment water pipe 66, a water discharge port 68, and a water guide pipe 70.
The water supply pipe 56 includes an upstream side water supply pipe 56a and a downstream side water supply pipe 56b, and an upstream end of the upstream side water supply pipe 56a is connected to a water supply source (not shown) such as an external water supply. The downstream end of the water supply pipe 56 a is connected to the water supply valve 58.
The upstream end of the downstream water supply pipe 56 b is connected to the water supply valve 58, and the downstream end of the downstream water supply pipe 56 b is connected to the branch part 60.

  The water supply valve 58 is an electromagnetic valve, and is based on a command from a controller (not shown) of the operating device 22 based on water level detection information of a water level sensor comprising a float switch 72 that detects the water level in the cleaning water tank 16. The opening / closing operation 58 is controlled so that the supply or stoppage of the wash water from the water outlet 68 of the water supply device 24 into the interior tank 28 is switched.

The branch part 60 is connected to the downstream side water supply pipe 56b, and is supplied from the water outlet 68 into the interior tank 28 via the water discharge pipe 62 connected to the downstream side of the branch part 60 when the hand wash water discharge is not omitted. The supply water supplied to the supply water pipe 66 connected to the downstream side of the water supply and discharge pipe 62 and the supply water supplied to the water conduit 70 connected to the downstream side of the branch part 60 can be branched. Yes.
The water discharge pipe 62 connected to the branch part 60 extends substantially in the horizontal direction.
Further, the water conduit 70 connected to the branch portion 60 is made of a flexible tube member such as a flexible hose, and extends approximately a predetermined distance upward from the branch portion 60 and is then gently bent toward the coupling member 26. The downstream end of the water conduit 70 is connected to a non-hand-washing water discharge conduit holding portion 80 of the coupling member 26 described later.
Furthermore, the branch part 60 supplies the washing water supplied from the water supply pipe 56 to the water discharge pipe 62 and the water guide pipe 70 in a predetermined ratio according to the ratio of the pipe inner diameter.

The makeup water pipe 66 extends from the upstream end connected to the water discharge pipe 62 slightly upward from the horizontal, and a makeup water pipe valve 76 is provided at the downstream end.
The makeup water pipe valve 76 of the makeup water pipe 66 is connected to the makeup water pipe connection portion 78 of the coupling member 26, and the makeup water branched from the water discharge pipe 62 passes through the makeup water pipe 66 and the makeup water pipe valve 76 to the coupling member 26. The replenishment water pipe connection 78 is supplied.
Further, the makeup water pipe valve 76 has a needle valve (not shown) incorporated therein, and is configured such that the flow path diameter on the downstream side of the makeup water pipe 66 can be adjusted by the needle valve. Therefore, the flow rate of the makeup water supplied from the makeup water inlet 122a can be adjusted by the contractor adjusting the flow path diameter according to the installation environment of the flush toilet 1 or the like.

  In the present embodiment, as an example, the embodiment in which the makeup water pipe valve 76 is provided at the downstream end of the makeup water pipe 66 has been described. However, the embodiment is not limited to this configuration, and the makeup water pipe valve 76 is omitted. The downstream end of the makeup water pipe 66 may be directly connected to the makeup water pipe connection section 78 of the coupling member 26.

Next, details of the inner lid 32 will be described with reference to FIGS.
FIG. 6 is a plan view showing a state in which the outer lid is removed in the cleaning water tank apparatus according to the embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG.

As shown in FIGS. 5 to 7, the inner lid 32 is made of a water-resistant material such as plastic, and is formed on the upper edge of the interior tank 28 so as to almost entirely cover the upper opening portion of the interior tank 28. It is detachably fixed.
The inner lid 32 is formed with a first handwash water conduit 82, a second handwash water conduit 84, a float switch vent 86, a makeup water pipe valve opening 88, and a dew condensation water drain 90.

  The first hand washing water conduit 82 faces a rear wall side inclined portion 100 of a water receiving portion 92 of the coupling member 26 described later. And in the use state which does not omit hand-washing water discharge, when hand-washing bowl 210 provided in outer lid 202 of washing-water tank device 14 is used and hand-washing water discharge is performed, washing discharged from water outlet 214 of hand-washing bowl 210 Water is discharged to the water receiving portion 92 of the coupling member 26 through the first hand washing water conduit 82.

  On the other hand, the second hand washing water conduit 84 faces a front wall side inclined portion 98 of a water receiving portion 92 of the coupling member 26 described later, and the outer lid 202 of the washing water tank device 14 is used in a state where hand washing water discharge is not omitted. When hand-washing water is discharged using a hand-washing bowl having a form different from that of the hand-washing bowl, the washing water spouted from the spout of the hand-washing bowl is discharged to the water receiving portion 92 of the coupling member 26 through the second hand-washing conduit 84. Is for. Therefore, in the present embodiment, the second hand-washing conduit 84 is not used regardless of the use state in which the hand-wash water discharge is omitted and the use state in which the hand-wash water discharge is not omitted.

A float switch vent 86 is formed above the float switch on the upper surface of the inner lid 32.
Further, a supply water pipe valve opening 88 is formed on the upper surface of the inner lid 32, and a supply water pipe valve 76 extends upward from the supply water pipe valve opening 88.
A plurality of dew condensation water drains 90 are formed on the upper surface of the inner lid 32, and the dew condensation water generated by the dew condensation generated between the inner lid 32 and the outer lid 30 is caused by these dew condensation water drains 90. Even if the liquid drops from the back surface of 30 onto the upper surface of the inner lid 32, the water is drained into the interior tank 28 through the condensed water drain port 90.

Next, the details of the coupling member 26 will be described with reference to FIGS. 2 and 7 to 10.
8 is a cross-sectional view of the enlarged portion viewed along line VIII-VIII in FIG. 2, and FIG. 9 is a perspective view of the coupling member according to the embodiment of the present invention as viewed obliquely from above. FIG. 10 is a cross-sectional view taken along line XX in FIG. 9.

  As shown in FIGS. 2 and 7 to 10, the coupling member 26 includes a water receiving portion 92, a non-hand-wash water discharge conduit connection portion 80, a makeup water conduit connection portion 78, and a water level detection sensor attachment portion 94. I have.

  The details of the washing water tank device 14 in use in which the hand washing water discharge according to the present embodiment is not omitted will be described later with reference to FIGS. 11 and 12, but the water receiving portion 92 of the coupling member 26 is used without omitting the hand washing water discharge. In the case of the state, the wash water discharged from the spout 212, which is a hand wash water discharge pipe described later, into the hand wash bowl 210 is received downstream and guided into the interior tank 28.

Further, the water receiving portion 92 of the coupling member 26 is attached to the front wall side mounting portion 92a that is mounted at a predetermined position substantially in the center along the upper end of the front wall 28b of the interior tank 28, and the upper end of the rear wall 28c of the interior tank 28. A rear wall side attachment portion 92b attached to a predetermined position substantially along the center is provided.
Further, the water receiving portion 92 of the coupling member 26 bridges the front wall 28b and the rear wall 28c of the interior tank 28 at a predetermined position substantially in the center along the upper ends of the front wall 28b and the rear wall 28c of the interior tank 28. Thus, a bridging portion 92c extending from the front wall side mounting portion 92a to the rear wall side mounting portion 92b is provided.

Further, the bottom surface of the bridging portion 92c of the water receiving portion 92 has a top portion 96 positioned above the replenishing water port 122a of the replenishing water pipe connecting portion 78 of the coupling member 26 described later, and the front wall of the interior tank 28 from the top portion 96. A front wall side inclined portion 98 that is inclined downward toward the 28b side and a rear wall side inclined portion 100 that is inclined downward from the top portion 96 toward the rear wall 28c side of the interior tank 28 are provided.
Further, the inclination of the rear wall side inclined portion 100 of the bridge portion 92 c of the water receiving portion 92 is steeper than the inclination of the front wall side inclined portion 98.

In particular, as shown in FIG. 9, the water receiving portion 92 of the coupling member 26 includes a front wall 102, a rear wall 104, a side wall 106, and a side wall 108.
A substantially rectangular front water outlet 110 is formed below the front wall 102, and a substantially square rear water outlet 112 is formed below the rear wall 104.

The side wall 106 and the side wall 108 are formed to extend on both sides of the top portion 96 of the bridging portion 92c, the front wall side inclined portion 98, and the rear wall side inclined portion 100. Further, when the washing water tank device 14 is in a use state in which hand washing water discharge is not omitted, the washing water that has flowed down into the bridging portion 92c from the hand washing bowl 210 side is lateral to the bridging portion 92c by the side walls 106 and 108. In addition to being dammed so as not to overflow to the side, water is discharged into the interior tank 28 from the front water discharge port 110 of the water receiving portion 92 along the front wall side inclined portion 98 or to the rear wall side inclined portion 100. The water is discharged into the interior tank 28 from the rear water outlet 112 of the water receiving portion 92 along the water tank 92.
Further, the side wall 108 is integrally coupled to the non-hand-washing water discharge conduit connection portion 80, the makeup water conduit connection portion 78, and the water level detection sensor attachment portion 94.

Next, with reference to FIG. 2, FIG. 9 and FIG. 10, the non-hand-wash water discharge conduit connecting portion 80 will be described.
As shown in FIGS. 2, 9, and 10, the non-hand-wash water discharge conduit connection portion 80 of the coupling member 26 is guided when the wash water tank device 14 of the present embodiment is in a use state in which hand-wash water discharge is omitted. A water conduit connecting portion main body 114 to which the downstream end portion 70 a of the water pipe 70 is connected and a water guiding portion 116 integrally formed on the downstream side of the water conduit connecting portion main body 114 are provided.

The conduit main body 114 is formed in a substantially cylindrical shape, and the outer diameter of the conduit main body 114 is set to be substantially equal to the inner diameter of the conduit of the conduit 70.
Further, the inner side of the conduit main body 114 communicates with the downstream conduit 116 to form a substantially cylindrical conduit 118.
Furthermore, the conduit main body 114 is inserted into the conduit 70 b of the downstream end 70 a of the conduit 70, and the conduit 70 is covered with the conduit 70 while the outer periphery of the conduit main body 114 is covered with the conduit 70. It is connected. Therefore, the conduit 70 b of the conduit pipe 70 and the conduit portion 116 of the non-hand-wash water discharge conduit connection portion 80 are in communication with each other through the conduit 118 of the conduit main body 114.

  The distal end portion 114a of the conduit main body 114 has an outer diameter that gradually increases from the distal end toward the proximal end on the downstream side by a predetermined length, and the downstream end of the conduit 70 is connected to the conduit main body 114. It is easy to insert the conduit main body 114 into the downstream end portion of the conduit 70, and once the conduit 70 and the conduit main body 114 are connected, the conduit 70 is firmly held by the water conduit main body 114 and is difficult to come off.

The water guide part 116 is formed integrally with the water receiving part 92 and the water guide pipe connecting part 114.
Moreover, the water conveyance part 116 is provided with the bottom face 116a, and forms the rectangular water flow path which lets water flow inside.

As shown in FIGS. 2, 7 and 9, the makeup water pipe connection portion 78 of the coupling member 26 includes a makeup water pipe connection portion main body 120 to which the makeup water pipe valve 76 is connected, and a downstream side of the makeup water pipe connection portion main body 120. The replenishment water guide part 122 arrange | positioned in is provided.
The make-up water guide portion 122 extends downward to form a water guide passage for introducing make-up water, and a make-up water port 122a is formed at the downstream end of the water guide passage.
Further, the makeup water inlet 122a of the makeup water guiding section 122 is disposed in the opening region of the upper end opening 38b of the overflow pipe 38,
The makeup water that has flowed into the makeup water guiding section 122 from the makeup water pipe connection holding section 120 is guided to the flush toilet 1 from the makeup water port 122a through the overflow pipe 38.

As shown in FIGS. 2, 5, and 9, the water level detection sensor mounting portion 94 of the coupling member 26 is a portion to which a float switch 72 that is a water level detection sensor that detects the water level of the cleaning water in the interior tank 28 is mounted. Yes, and integrally coupled to the water receiving portion 92 and the makeup water pipe connecting portion 78.
Further, the water level detection sensor mounting portion 94 is formed with an opening 94a into which the float switch 72 is inserted and mounted.
Further, the water level detection sensor mounting portion 94 of the coupling member 26 is arranged in the vicinity of the upper center in the interior tank 28.

  Further, in the cleaning water tank device 14 of the present embodiment, for example, the coupling member 26 is integrally formed of a synthetic resin such as plastic, and the like, and the water receiving portion 92, the water conduit connecting portion 80, the makeup water pipe connecting portion 78, and the water level. Although the embodiment in which a plurality of portions of the detection sensor mounting portion 94 are integrally coupled to each other has been described, the present invention is not limited to such a configuration, and some of the plurality of portions may be integrally coupled. Good.

Next, with reference to FIG.11 and FIG.12, the structure of the washing water tank apparatus of the use state which does not abbreviate | omit the hand-washing water discharge by one Embodiment of this invention is demonstrated.
FIG. 11 is a side cross-sectional view showing a washing water tank device in a use state that does not omit hand washing water discharge according to an embodiment of the present invention, and FIG. 12 shows a use state in which hand washing water discharge according to an embodiment of the present invention is not omitted. It is the schematic perspective view which looked at the internal structure of the washing water tank apparatus from the back side.
Here, in the wash water tank device in the use state in which the hand wash water discharge according to the present embodiment shown in FIGS. 11 and 12 is not omitted, the same part as the portion of the wash water tank device in the use state in which the hand wash water discharge described above is omitted. The same reference numerals are assigned, and the description thereof is omitted, and only different portions will be described.

  As shown in FIGS. 11 and 12, in the wash water tank device 14 in a use state that does not omit hand wash water discharge according to an embodiment of the present invention, the outer lid 202 for hand wash water discharge has a use state in which hand wash water discharge is omitted. Instead of the outer lid 30 of the cleaning water tank device 14, it is attached to the exterior tank 16. The outer lid 202 includes a hand-washing bowl 210 formed on the upper surface thereof, and a spout 212 that is provided on the rear side of the hand-washing bowl 210 and is connected to the water conduit 70 to discharge water into the hand-washing bowl 210. ing.

The hand-washing bowl 210 is formed in a bowl shape (bowl shape), and a hand-washing bowl spout 214 is formed at the bottom thereof.
Further, the hand-washing bowl spout 214 extends downward and is connected to the first hand-washing conduit 82 of the inner lid 32.
Further, the wash water spouted from the spout 212 b of the spout 212 to the hand wash bowl 210 flows from the hand wash bowl spout 214 into the first hand wash water conduit 82 of the inner lid 32, and the water receiving portion 92 of the coupling member 26. It flows along the rear wall side inclined portion 100 of the bridging portion 92c and is discharged into the interior tank 28 from the rear water outlet 112 of the water receiving portion 92.

  In the wash water tank device 14 in use in which the hand wash water discharge of the present embodiment is omitted, as an example, the hand wash bowl water discharge port 214 and the inner lid are arranged on the arrangement of the hand wash bowl water discharge port 214 of the hand wash bowl 210 with respect to the inner lid 32. Although the embodiment in which the first handwash water conduit 82 of 32 is communicated will be described, the present invention is not limited to such a configuration, and the arrangement of the handwashing bowl spout 214 with respect to the inner lid 32 is changed to the handwashing bowl spout 214. The second hand-washing conduit 84 of the inner lid 32 may be communicated with each other.

As shown in FIG. 11, a water conduit connecting portion 212 a to which the downstream end 70 a of the water conduit 70 is connected is provided at the upstream end of the spout 212.
That is, as shown in FIG. 12, in the water guide pipe 70 in a use state in which hand wash water discharge is not omitted, the downstream end portion 70 a in the use state in which hand wash water discharge is omitted is a non-hand wash water discharge water pipe connecting portion 80 of the coupling member 26. And the connection end of the downstream end portion of the water conduit 70 is switched to the water conduit connection portion 212a of the spout 212 positioned above the non-hand-wash water discharge water conduit connection portion 80 of the coupling member 26. It is connected.
Accordingly, the water conduit 70 in a use state in which hand washing water discharge is not omitted is not connected to the water conduit connecting portion 80 of the coupling member 26, so that no water is supplied to the water conduit connecting portion 80.

  Next, as shown in FIGS. 10 and 11, the channel diameter d <b> 1 in the conduit main body 114 of the conduit connection portion 80 of the coupling member 26 is connected to the conduit tube 70 in a use state in which hand washing water discharge is not omitted. The spout 212 is set to be smaller than the flow path diameter d2 of the water conduit connecting part 212a.

Next, with reference to FIG. 1 to FIG. 10 and FIG. 13, the operation (action) of the cleaning water tank device in use in which the hand washing water discharge according to the embodiment of the present invention is omitted will be described.
FIG. 13 is a diagram schematically illustrating the operation of the valve body of the drain valve device in the cleaning water tank device according to the embodiment of the present invention. Here, in FIG. 13, the height position of the valve body 40 in a state where the valve body 40 is most raised and the drain port 16 b is opened is indicated by h 1, and the valve body 40 is the height of the lower end of the storage member 44. The height position of the valve body 40 when passing through the position is indicated by h2, and the height position in the state where the valve body 40 is most lowered to close the drain port 16b is indicated by h3.

  First, as shown in FIG. 13, after the user uses the flush toilet 1, a signal from a human body detection sensor (not shown) that detects the toilet user provided in the flush toilet 1, or the flush toilet 1 A signal that a user operates an operation button (not shown) for instructing the cleaning operation is sent to a controller (not shown) in the operation device 22, and the operation of the rotary drive device 22c is started. When the rotation driving device 22c is activated, the operation lever 22a rotates in a predetermined direction together with the rotation shaft 22b, the ball chain 48 attached to the operation lever 22a is pulled up, and the ball chain attachment portion 38d of the overflow pipe 38 is moved. Be raised. At this time, the overflow pipe 38 rises with respect to the guide member 42 while being guided by the guide member 42 so that the vertical movement of the overflow pipe 38 does not cause a lateral shift or inclination with respect to the vertical direction. Further, since the valve body 40 is fixed to the lower end portion of the overflow pipe 38, the valve body 40 also rises as the overflow pipe 38 rises.

  When the valve body 40 is pulled up to the highest height position h1, the operation of the rotary drive device 22c is stopped. At this time, the upper side and the outer peripheral side of the valve body 40 are surrounded and stored by the storage member 44.

  Then, while the valve body 40 opens the drain port 16 b of the interior tank 28, the wash water is drained from the drain port 16 b of the interior tank 28 to the water conduit 4 of the flush toilet 1, and the wash water in the water conduit 4 Is discharged from the rim spout 10 of the flush toilet 1 and the flush toilet 1 is washed.

Thereafter, after a predetermined time has elapsed or when a signal from a sensor or the like is received, the operating device 22 starts the operation of the rotation driving device 22c again, the operating lever 22a rotates in a predetermined direction together with the rotating shaft 22b, and the ball chain 48 Is lowered, and the ball chain attaching portion 38d of the overflow pipe 38 starts to descend.
When the valve body 40 starts to descend, the cleaning water in the interior tank 28 is passed through a plurality of openings 52 and 54 formed on the upper surface and the side surface of the storage member 44, and the internal region between the storage member 44 and the valve body 40. Flows into R.

In FIG. 13, the flow flowing into the inner region R of the storage member 44 from the opening 52 on the upper surface of the storage member 44 is indicated by F <b> 1.
Similarly, the flow flowing into the inner region R of the storage member 44 from the opening 54 on the side surface of the storage member 44 is indicated by F2.

  Here, in the inner region R of the storage member 44, in particular, the region between the upper surface of the valve body 40 at the highest height position h1 and the upper surface of the storage member 44, and the valve at the highest height position h1. In the internal region R between the outer peripheral side surface of the body 40 and the side surface of the storage member 44, if it is assumed that the openings 52 and 54 of the storage member 44 are not provided, the valve body 40 is in the uppermost position. When the descent starts from the height position h <b> 1, a negative pressure acting in the direction of raising the valve body 40 is generated.

In addition, in FIG. 13, when the height position of the valve body 40 when the valve body 40 in the storage member 44 descends and comes out of the storage member 44 is indicated by h2, openings 52 and 54 of the storage member 44 are temporarily provided. Assuming a state in which the valve body 40 is not in operation, the valve body 40 descends from the height position h1 and comes out downward from the inside of the storage member 44 at the height position h2. The negative pressure that disappears disappears instantaneously.
However, in this embodiment, when the valve body 40 is lowered, water is easily supplied from the outside of the storage member 44 to the internal region R between the valve body 40 and the storage member 44 through the openings 52 and 54 of the storage member 44. Since it can be made to enter, the negative pressure which acts in the direction which raises the valve body 40 in the internal area | region R between the valve body 40 and the accommodating part 44 can be suppressed.

Furthermore, the interior tank 28 of the cleaning water tank apparatus 14 of the present embodiment has a high silhouette type shape that is relatively long in the vertical direction, and the water stop level WL2 in the interior tank 28 is the height of the valve body 40 when it rises. It is set to be higher than the position h1, and when the valve body 40 is lowered from the height position h1 and the valve body 40 is pulled out from the inside of the storage member 44 at the height position h2, the interior tank 28 is provided. Since a relatively large amount of washing water remains in the inside, the water pressure corresponding to this amount of washing water acts on the valve body 40 as a relatively large water pressure.
Accordingly, the negative pressure acting in the direction of raising the valve body 40 in the internal region R between the valve body 40 and the storage portion 44 due to the relatively large water pressure of the washing water remaining in the interior tank 28. Even if such a negative pressure acts on the valve body 40, it acts on the valve body 40 when the valve body 40 is pulled out from the inside of the storage member 44 at the height position h2. The negative pressure disappears instantaneously, and water pressure that causes the valve body 40 to drop rapidly does not act on the valve body 40.
As a result, until the valve body 40 is lowered from the height position h2 and the drain port 16b is closed at the height position h3, the valve body 40 receives the water pressure of the cleaning water remaining in the interior tank 28. However, the valve body 40 descends in a stable state at a substantially constant speed.

  Furthermore, since the valve body 40 and the overflow pipe 38 abut against the valve seat 46 at a relatively low speed when the valve body 40 is closed, the closing sound generated at this time is also suppressed.

Next, after the valve body 40 has stopped the water discharge port 16b, the water supply valve 58 of the water supply device 24 is opened by a command from a controller (not shown) of the operation device 22, and the water discharge port of the water supply device 24 is opened. The cleaning water is supplied from 68 to the interior tank 28, and the water level in the interior tank 28 gradually rises again from the water stop level WL2.
In addition, when the water supply valve 58 of the water supply device 24 is opened, cleaning water is introduced from the branch portion 60 to the water conduit 70 at the same time.
Further, the cleaning water supplied to the water conduit 70 is guided from the water conduit 70 to the conduit main body 114 of the non-hand-wash water conduit pipe connection portion 80 of the coupling member 26 in a use state in which hand washing water discharge is omitted. The At this time, since the flow path diameter d1 of the conduit main body 114 is smaller than the inner diameter of the conduit 70, the pressure of the wash water flowing from the conduit 70 into the conduit of the conduit main body 114 is In response to the loss, the flow rate decreases.

  In addition, the wash water that has flowed into the water guide portion 116 from the water conduit main body 114 flows along the bottom surface 116a of the water guide portion 116 along the bottom surface 116a of the interior tank 28 as shown by the arrows in FIG. Or at least a part of the wash water flowing out from the water conduit 116 flows down along the rear wall 28c of the interior tank 28. The falling sound of the washing water can be suppressed as compared with the case where the washing water falls directly into the interior tank 28.

At this time, a part of the wash water led from the branch part 60 to the water discharge pipe 62 passes through the make-up water pipe 66 to the make-up water pipe connection part 78 of the coupling member 26 as make-up water. .
Then, the wash water (make-up water) that has flowed into the make-up water pipe connection holding section 120 of the make-up water pipe connection section 78 flows into the overflow pipe 38 from the make-up water inlet 122 a through the make-up water guide section 122.
The makeup water that has flowed down the overflow pipe 38 is drained from the drain port 16 b to the conduit 4, discharged from the rim spout 10 of the flush toilet 1, and supplied to the flush toilet 1. By replenishing the replenishing water, it is possible to replenish (refill) the accumulated water reduced due to the occurrence of the siphon action.

  Further, when the water level in the interior tank 28 reaches the full water level WL1, the operating device 22 issues a command to the water supply device 24 based on a signal from the float switch 72 that detects the water level WL1 in the interior tank 28, In response to the command, the water supply valve 58 of the water supply device 24 is closed, and the supply of cleaning water from the water outlet 68 of the water supply device 24 into the interior tank 28 is stopped.

Next, with reference to FIGS. 1 to 12, the operation (action) of the cleaning water tank apparatus in a use state in which hand-washing water discharge according to an embodiment of the present invention is not omitted will be described.
Here, the description of the same part as the part of the operation (action) of the cleaning water tank apparatus in the use state in which the hand washing water discharge according to the embodiment of the present invention is omitted is omitted, and only the part of the different operation (action) is omitted. Will be described.
As shown in FIGS. 11 and 12, in the wash water tank device 14 in the use state in which the hand wash water discharge is omitted, the outer lid 30 for the non-hand wash water discharge of the wash water tank device 14 in the use state in which the hand wash water discharge is not omitted. Instead, an outer lid 202 for hand-washing water discharge is attached to the exterior tank 16, and the water conduit 70 is connected to the water conduit connecting portion 212 a of the spout 212.

After the washing water draining operation to the flush toilet 1 is completed, the water supply valve 58 of the water supply device 24 is opened by a command from a controller (not shown) of the operation device 22, and the water discharge pipe 62 of the water supply device 24 is opened. The cleaning water is supplied from the water outlet 68 into the interior tank 28, and the water level in the interior tank 28 gradually rises again.
When the water supply valve 58 of the water supply device 24 is opened, cleaning water is introduced from the branching portion 60 of the water supply device 24 to the water conduit 70 at the same time. The washing water supplied to the water conduit 70 is guided to the spout 212 through the water conduit connection portion 212a of the spout 212 located above the water conduit 70. At this time, since the water conduit connecting portion 212a of the spout 212 is located above the non-hand-wash water discharge conduit connecting portion 80 of the coupling member 26, the spout 212 passes from the branch portion 60 of the water supply device 24 through the water conduit 70. In the flow path leading to, the washing water flows upward, and the rising and flowing washing water is subjected to pressure loss.

  However, even if the water conduit connection part 212a of the spout 212 is located above the non-hand-wash water discharge water conduit connection part 80 of the coupling member 26, the flow path diameter of the non-hand-wash water discharge water pipe connection part 80 of the coupling member 26 Since d1 is set to be smaller than the flow path diameter d2 of the water conduit connecting part 212a of the spout 212, the flow path from the branch part 60 to the water conduit connecting part 212a of the spout 212 in a use state where hand washing water discharge is not omitted. Both pressure loss when flowing through the flow path and pressure loss when flowing through the flow path from the branch portion 60 to the non-hand-wash water discharge water conduit connecting portion 80 of the coupling member 26 in a use state in which hand-wash water discharge is omitted The loss is almost equal.

Next, the wash water discharged into the hand-washing bowl 210 flows into the hand-washing bowl drain pipe 216 from the hand-washing bowl drain outlet 214, falls vertically in the hand-washing bowl drain pipe 216, and is used for the first hand washing of the inner lid 32. It flows into the water conduit 82.
The wash water that has flowed down to the first handwash waterway 82 of the inner lid 32 is crossed by the first handwash waterway 82 and the bridging portion of the water receiving portion 92 of the coupling member 26 located below the first handwash waterway 82. Water is guided to the rear wall side inclined portion 100 of 92c.
Then, as shown in FIGS. 7 and 11, the cleaning water of the rear wall side inclined portion 100 flows down along the bottom inclined surface of the rear wall side inclined portion 100, and the rear water outlet 112 of the coupling member 26. Or at least a part of the wash water that flows out from the rear spout 112 flows down along the rear wall 28c of the interior tank 28, and the wash water flows into the interior tank 28. Therefore, it is possible to suppress the sound of water falling from the washing water more than when the water falls directly.

At this time, a part of the wash water led from the branch part 60 to the water discharge pipe 62 passes through the make-up water pipe 66 to the make-up water pipe connection part 78 of the coupling member 26 as make-up water. .
At this time, the flow path diameter d1 of the non-hand-wash water discharge conduit connection part 80 of the coupling member 26 is set to be smaller than the flow path diameter d2 of the water conduit connection part 212a of the spout 212. Pressure loss when flowing through the flow path from the branch part 60 to the water conduit connection part 212a of the spout 212 at the time, and non-hand-washing water guiding of the coupling member 26 from the branch part 60 in a use state in which hand-washing water discharge is omitted. The pressure loss when flowing through the flow path to the water pipe connecting portion 80 is substantially equal.
As a result, the water conduit 70 is connected to the water conduit connection portion of the spout 212 when the water supply device 24 is in a use state in which hand washing water discharge is not omitted even if water is branched from the branch portion 60 to the water discharge tube 62 and the water conduit 70. Regardless of whether it is connected to 212a or when the water conduit 70 is connected to the non-hand-wash water discharge conduit connection portion 80 of the coupling member 26 in a use state in which hand-wash water discharge is omitted, fluctuations in pressure loss are suppressed. be able to. Therefore, the variation in the amount of makeup water in the makeup water pipe 66 on the downstream side of the water discharge pipe 62 can be suppressed,
The makeup water can be stably supplied to the overflow pipe 38 from the makeup water port 122a, and the stable makeup water can be supplied to the stored water in the bowl portion 2 of the flush toilet 1 from the drain port 16b.

  Further, when the water level in the interior tank 28 reaches the full water level WL1, the operating device 22 issues a command to the water supply device 24 based on a signal from the float switch 72 that detects the water level WL1 in the interior tank 12, In response to the command, the water supply valve 58 of the water supply device 24 is closed, water is discharged from the hand-washing water discharge pipe connected to the water conduit 70 of the water supply device to the hand-washing basin 210, and from the water outlet 68 of the water supply device 24 into the interior tank 28. The cleaning water supply is stopped.

According to the drain valve device 20 of the washing water tank device 14 according to the embodiment of the present invention described above, the valve body 40 is raised (opened) by the openings 52 and 54 formed on the upper surface and the side surface of the storage member 44, respectively. At the time of valve), water between the valve body 40 and the storage member 44 can escape to the outside of the storage member 44.
On the other hand, when the valve body 40 is lowered (when the valve is closed), it is easy to enter the inner region R between the valve body 40 and the storage member 44 from the outside of the storage member 44 through the openings 52 and 54 of the storage member 44. Water can enter. As a result, the negative pressure acting in the direction in which the valve body 40 is raised in the internal region R between the valve body 40 and the storage portion 44 can be suppressed, and such a negative pressure is reduced in the storage member 44. When the valve body 40 descends and comes out of the storage member 44, it can be prevented from disappearing instantaneously.
Further, since it is possible to suppress the water pressure that causes the valve body 40 to be rapidly lowered due to such instantaneous disappearance of the negative pressure from acting on the valve body 40, the valve body 40 that is being lowered during the valve closing operation. It is possible to reduce the closing sound that is generated when the drainage port 16b is closed with a rapid momentum.
Furthermore, since the load on the valve body 40 and the deformation of the valve body 40 itself due to the water pressure generated by the instantaneous disappearance of the negative pressure described above can be suppressed, the valve body 40 at the time of closing ensures the drain port 16b. While being able to close, durability of valve body 40 itself can be improved.
Further, the interior of the storage member 44 and the interior tank 28 communicate with each other through the openings 52 and 54 of the storage member 44, so that water in the storage member 44 can be discharged from the openings 52 and 54 even when the valve body 40 is raised. Since the storage member 44 can move in and out relatively freely in the vertical direction and the horizontal direction, the valve body 40 can rise smoothly with respect to the storage member 44, and the load on the valve body 40 and the deformation of the valve body 40 itself are deformed. Can be suppressed. Therefore, in the rotational drive device 22c of the operating device 22, the force and torque required to pull up the valve body 40 can be reduced by driving the rotating shaft 22b, and the operability of the valve body 40 by the operating device 22 is facilitated. Can do. As a result, the power consumption of the drive device of the rotary drive device 22c of the operation device 22 can be reduced.

  Further, according to the drain valve device 20 of the cleaning water tank device 14 according to the present embodiment, the plurality of openings 52 and 54 of the storage member 44 are arranged symmetrically with respect to the center A of the upper surface portion 44 b of the storage member 44. As a result, when the valve body 40 is lowered (when the valve is closed) from the storage member 44 and comes out, the load on the valve body due to the relatively large water pressure generated in the storage member 44 can be eliminated in a balanced manner. it can. As a result, it is possible to realize a reliable valve closing operation of the valve body 40 without tilting the descending valve body 40 and to more effectively suppress deformation of the valve body 40 itself.

According to the washing water tank apparatus 14 according to the above-described embodiment of the present invention, the water receiving portion 92 and the non-hand-wash water discharge conduit connection portion 80 are integrally coupled to each other by the coupling member 26, so The coupling member 26 can be used as a common member regardless of the omitted usage state and the usage state not omitted. As a result, when the hand wash water discharge is not omitted, the branch portion 60 of the water supply device 24 and the spout 212 are connected by the water conduit 70, and the water branched from the branch portion 60 of the water feeder 24 passes through the water conduit 70. After the washing water introduced to 212 and discharged from the spout 212 to the hand-washing bowl 210 is received by the water receiving portion 92 of the coupling member 26, it can be discharged into the interior tank 28.
On the other hand, in a use state in which hand-washing water discharge is omitted, the branch portion 60 of the water supply device 24 and the non-hand-wash water discharge water pipe connecting portion 80 of the coupling member 26 are connected by the water conduit 70, and from the branch portion 60 of the water supply device 24. After the branched water supply is guided to the non-hand-wash water discharge water pipe connecting portion 80 of the coupling member 26 through the water supply pipe 70, the water can be discharged into the interior tank 28.
In addition, the common coupling member 26 can be used regardless of the usage state in which hand-washing water discharge is omitted and the usage state in which the hand washing water discharge is not omitted, so that the assembly process of the coupling member 26 to the interior tank 28 at the time of manufacturing and assembly can be made common. In addition, the number of mounting steps can be reduced, and the production efficiency can be improved.
Furthermore, since the arrangement of the water receiving portion 92 and the non-hand-wash water discharge conduit connection portion 80 in the interior tank 28 is concentrated at a specific location by the coupling member 26, the outer lid 30 is removed from the exterior tank 16 during maintenance. In this state, the water receiving portion 92 of the coupling member 26 and the non-hand-washing water discharge conduit connection portion 80 are easily visible to the operator, and the state of the coupling member 26 can be easily confirmed.
Further, the water receiving portion 92 and the non-hand-washing water discharge conduit connection portion 80 are integrally provided in the coupling member 26, so that the water receiving portion 92 and the non-hand-washing water discharge conduit are provided in the relatively narrow interior tank 28. Each of the connection portions 80 can be arranged in a compact manner, and a space other than the coupling member 26 in the interior tank 28 can be secured widely, and a work space for maintenance can be secured widely. Becomes easier.

Further, according to the cleaning water tank device 14 according to the present embodiment, the makeup water pipe connecting portion 78 and the water receiving portion 92 of the coupling member 26 are integrally coupled to each other, and therefore, coupled to the interior tank 28 at the time of manufacturing and assembly. While the assembly process of the member 26 can be made common, the number of processes of attachment work can be reduced, and the production efficiency can be improved.
Furthermore, since the arrangement of the makeup water pipe connecting portion 78 and the water receiving portion 92 in the interior tank 28 is concentrated at a specific location by the coupling member 26, in a state where the outer lid 30 is removed from the washing water tank during maintenance, The water receiving portion 92 and the makeup water pipe connecting portion 78 of the coupling member 26 are easily visible to the operator, and the state of the coupling member 26 can be easily confirmed.
Further, by providing the replenishment water pipe connecting portion 78 and the water receiving portion 92 integrally in the coupling member 26, each of the replenishing water pipe connecting portion 78 and the water receiving portion 92 can be made compact in the relatively narrow interior tank 28. The space other than the coupling member 26 in the interior tank 28 can be secured widely, and a work space for maintenance can be secured widely, and the maintenance in the interior tank 28 is facilitated.

Furthermore, according to the cleaning water tank device 14 according to the present embodiment, the water level detection sensor mounting portion 94 and the water receiving portion 92 of the coupling member 26 are integrally coupled to each other, so that it is a water level detection sensor during manufacturing and assembly. The float switch 72 can be easily attached to the water level detection sensor attachment portion 94 of the coupling member 26.
Further, the float switch 72 can be easily attached at a predetermined position in the interior tank 28 by simply attaching the coupling member 26 to the interior tank 28 with the float switch 72 attached to the water level detection sensor attachment portion 94 of the coupling member 26. It is possible to simplify the mounting process of the float switch 72 during manufacturing and assembly.
Furthermore, since it is not necessary to provide a mounting portion for the float switch 72 on the interior tank 28 side, the shape of the interior tank 28 can be simplified.

Further, according to the cleaning water tank device 14 according to the present embodiment, the water of the coupling member 26 is arranged so as to bridge the front wall 28b and the rear wall 28c of the internal tank 28 at a predetermined position in the width direction of the upper end of the internal tank 28. The bridge portion 92c extending from the front wall side attachment portion 92a to the rear wall side attachment portion 92b of the receiving portion 92 reinforces the upper end of the interior tank 28 so that the upper end of the interior tank 28 is not distorted. be able to.
Further, the top portion 96 of the bottom surface of the bridging portion 92 c is located above the makeup water inlet 122 a of the makeup water pipe connection portion 78 of the coupling member 26, and the front wall side inclined portion 98 and the rear wall side inclined portion 100 extend from the top portion 96. By tilting downward, the height dimension of the water receiving portion 92 of the coupling member 26 can be suppressed, and the entire interior tank can be made compact.

Furthermore, according to the cleaning water tank apparatus 14 according to the present embodiment, even if the water conduit connecting portion 212a of the spout 212 is located above the non-hand-wash water discharge conduit connecting portion 80 of the connecting member 26, the connecting member 26 Since the flow path diameter d1 of the non-hand-wash water discharge conduit connection part 80 is set to be smaller than the flow path diameter d2 of the water conduit connection part 212a of the spout 212, the conduit pipe 70 is in a use state where hand-wash water discharge is not omitted. Pressure loss when flowing through the flow path of the water conduit connection part 212a of the spout 212 from the water flow path and the flow path of the non-hand-wash water discharge water pipe connection part 80 of the coupling member 26 from the water conduit 70 in a use state in which hand washing water discharge is omitted. Both the pressure loss and the pressure loss when flowing through the can be made substantially equal.
Further, even if water is branched from the branch portion 60 of the water supply device 24 to the water discharge pipe 62 and the water conduit 70, the water conduit 70 is connected to the water conduit connection section 212 a of the spout 212 in a use state where hand washing water discharge is not omitted. Regardless of whether the water guide pipe 70 is connected to the non-hand-wash water discharge water pipe connecting portion 80 of the coupling member 26 in a use state where hand wash water discharge is omitted, the fluctuation of pressure loss is suppressed. Therefore, the variation in the amount of makeup water in the makeup water pipe 66 on the downstream side of the water discharge pipe 62 can be suppressed.

Further, according to the cleaning water tank device 14 according to the present embodiment, the cleaning water is contained in the interior tank 28 by the inner lid 32 attached between the coupling member 26 and the outer lid 30 so as to cover the upper part of the interior tank 28. It is possible to prevent the washing water from splashing upward from the inner lid 32 when supplied to the interior and to reduce the leakage of the sound generated inside the interior tank 28 and the inner lid 32 to the outside.
Furthermore, the inner lid 32 can prevent the inner tank 28 from being tampered with the outer lid 30 removed.
In addition, the first handwash water conduit 82 formed in the inner lid 32 can surely guide the wash water discharged from the hand-washing bowl 210 to the water receiving portion 92 of the coupling member 26. It is possible to reduce the sound of falling water that is generated when water flows from the first hand washing water conduit 82 to the water receiving portion 92 of the coupling member 26.

  Furthermore, according to the cleaning water tank device 14 of the present embodiment, the air permeability around the float switch 72 is improved by the float switch vent 86 formed at a predetermined position of the inner lid 32 above the float switch 72. It is possible to prevent moisture in the interior tank 28 from collecting around the float switch 78. Therefore, failure of the float switch 72 due to moisture can be prevented.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Bowl part 4 Water conduit 6 Drain trap pipe 8 Rim 10 Rim spout 12 Jet spout 14 Wash water tank device 16 Wash water tank main body 16a Bottom surface 16b Drain port 18 Lid unit 20 Drain valve device 22 Operation device ( Operation part)
24 Water supply equipment (water supply part)
26 coupling member 28 interior tank 28a bottom surface part 28b front wall 28c rear wall 29 heat insulating material 30 outer lid 32 inner lid 34 base member 36 support member 38 overflow pipe 38a lower end opening part of overflow pipe 38b upper end opening part of overflow pipe 38c overflow pipe Convex part 40 valve body 42 guide member 44 storage member 44a base part 44b upper surface part 44c side surface part 46 valve seat 47 water guide channel 48 ball chain 52 opening (upper surface opening part)
54 Opening (side opening)
DESCRIPTION OF SYMBOLS 56 Water supply pipe 58 Water supply valve 60 Branch part 62 Water discharge pipe 66 Supply water pipe 68 Water discharge port 70 Water transfer pipe 70a Downstream end part 70b of water supply pipe
72 Float switch 76 Supply water pipe valve 78 Supply water pipe connection part 80 Non-hand-wash water discharge pipe connection part 82 First hand-wash water supply path 84 Second hand-wash water supply path 86 Float switch vent opening 88 Supply water pipe valve opening 90 Condensation water Drain port 92 Water receiving portion 92a Front wall side mounting portion 92b Rear wall side mounting portion 92c Bridge portion 94 Water level detection sensor mounting portion 96 Top portion of bridge portion of water receiving portion 98 Front wall side inclined portion 100 of bridge portion of water receiving portion Rear wall-side inclined portion 102 of the water receiving portion 102 Water receiving portion front wall 104 Water receiving portion rear wall 106 Water receiving portion side wall 108 Water receiving portion side wall 110 Water receiving portion front water outlet 112 Water receiving portion Rear water discharge port 114 Non-hand-wash water discharge conduit connection body main body 114a Non-hand-wash water discharge conduit connection portion tip end portion 116 Non-hand-wash water discharge Water guide portion 116a of the water conduit connection portion Bottom surface 118 of the water guide portion of the non-hand wash water discharge water conduit connection portion Water passage 120 of the water conduit connection portion body of the water conduit connection portion for non-hand-wash water discharge Water supply water connection portion main body 122 Supply water water guide portion 122a Replenishment water port 202 Outer lid 210 Hand-washing bowl 212 Spout (hand-washing water discharge pipe)
212a Conduit connection part (conduit connection part for hand washing water discharge)
214 Hand wash bowl spout 216 Hand wash bowl drain pipe A Center of upper surface of storage member d1 Flow path diameter of main conduit connection part d2 Flow path diameter of upstream end of spout R Internal region WL1 Full water level WL2 Water stop water level

Claims (7)

A drain valve device provided in a wash water tank for supplying wash water to a toilet,
A valve body for opening and closing a drain outlet formed on the bottom surface of the washing water tank;
A pipe member provided with one end of the valve body;
An operation unit that is connected to the pipe member and opens and closes the drain port by the valve body by moving the pipe member up and down.
A part of the tube member is inserted, and a guide portion for guiding the vertical movement of the tube member;
A storage portion provided below the guide portion so as to surround and store the upper and outer peripheral sides of the valve body when the valve body is pulled up to a predetermined or higher position;
Between the storage part and the bottom surface of the cleaning water tank, a water conduit that guides the cleaning water in the cleaning water tank to the drain outlet,
The housing part, in its upper surface, the washing water in the interior region of the housing part from the outside of the washing water tanks and the housing part from the interior area leaves its outside of the wash water tank of the storage unit A drainage valve device comprising an upper surface opening formed with an opening for entering .   The drainage valve device according to claim 1, wherein the storage portion further includes a side opening portion having an opening formed on a side surface thereof.   The drain valve device according to claim 1, wherein the upper surface opening of the storage part forms a plurality of openings on the upper surface of the storage part.   The drain valve device according to claim 2, wherein the side opening of the storage portion forms a plurality of openings on a side surface of the storage portion.   The drain valve device according to claim 3, wherein the plurality of openings of the upper surface opening of the storage unit are arranged symmetrically with respect to the center of the upper surface of the storage unit.   The drain valve device according to claim 4, wherein the plurality of openings in the side opening of the storage portion are arranged symmetrically with respect to the center of the upper surface of the storage portion.   A washing water tank apparatus having the drain valve apparatus according to any one of claims 1 to 6.

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