JP6361856B2 - Flush toilet equipment - Google Patents

Description

  The present invention relates to a flush toilet apparatus, and more particularly, to a flush toilet apparatus that supplies and flushes flush water to a toilet body by a jet pump action.

Conventionally, as described in, for example, Patent Document 1, a flush toilet apparatus provided with a jet pump mechanism capable of continuously supplying strong water to a bowl surface of a toilet bowl is known. .
This toilet is provided in a water storage tank so that a partition container for switching between large and small washing surrounds the jet nozzle. An opening is formed in the compartment container, and a switching valve is provided in the opening so as to be openable and closable. When the switching valve is opened and closed in the outward direction of the compartment container by a user's toilet cleaning operation, Small washing can be switched.

JP 2004-156382 A

However, in the conventional flush toilet apparatus described in Patent Document 1 described above, since there are internal fittings such as a jet nozzle, a water supply pipe, and a float, the entire water storage tank cannot be downsized. There is a problem that it does not meet the needs of miniaturized design.
Specifically, since the switching valve is opened and closed in the outward direction of the compartment container, it interferes with an internal metal fitting (for example, a water supply valve) arranged in the water storage tank, and the entire water storage tank is There is a problem that it cannot be miniaturized.
Moreover, in the conventional flush toilet apparatus described in Patent Document 1 described above, the switching valve is kept open and closed by the water pressure and the weight of the wash water in the water storage tank after the user's operation. In the jet pump mechanism in which the washing water is discharged from the water storage tank vigorously and the state of the washing water stored in the water storage tank changes drastically, there is a problem that it is very difficult to control the switching valve.
Therefore, there is a problem that the switching valve cannot be stably operated and the large and small washing water cannot be stably supplied to the toilet body.

  Therefore, the present invention has been made to solve the problems of the prior art, and the entire water storage tank can be reduced in size, and the switching valve can be operated stably. An object of the present invention is to provide a flush toilet apparatus capable of supplying large and small wash water to the toilet body.

In order to achieve the above object, the present invention is a flush toilet apparatus for cleaning by supplying cleaning water to a toilet body by a jet pump action, and a bowl portion for receiving filth and cleaning water in the bowl portion. A toilet body provided with a water conduit for guiding, a water storage tank for storing wash water to be supplied to the toilet body, and a jet pump unit disposed at least partially submerged in the water storage tank. The jet pump unit is arranged so that one end thereof is connected to the inlet of the water conduit of the toilet body, and the other end is formed with a suction port, and the suction port is located in the lower part of the water storage tank. The jet pump unit comprising: a throat pipe; and a jet nozzle for injecting cleaning water toward a suction port of the throat pipe to induce a jet pump action; A wall surface that extends in the vertical direction in the tank and has an opening formed so as to penetrate the wall surface, and a small amount of washing water that is less than the washing water stored in the entire water storage tank is stored. A partition wall that forms a space, and a switching valve that can open and close an opening of the partition wall and change the amount of washing water supplied to the toilet body through the jet pump unit. The partition wall is provided to be openable and closable in a small space formed, and the opening of the partition wall is directed in a direction other than the jet nozzle .
In the present invention configured as above, the switching valve that can open and close the opening of the partition wall and change the amount of washing water supplied to the toilet body through the jet pump unit is provided in a small space formed by the partition wall. By being provided so as to be able to open and close, the entire water storage tank can be reduced in size without interfering with an internal fitting (for example, a water supply valve) disposed outside the small space and a switching valve. Therefore, it can fully respond to the recent needs for downsizing the entire water storage tank. In addition, since the switching valve operates in a small space inside the partition wall where the state of the washing water stored is relatively more stable than the outside of the partition wall, the switching valve can be operated stably. The large and small washing water can be stably supplied to the toilet body.
In addition, since the opening of the partition wall is directed in a direction other than the jet nozzle, the jet nozzle vigorously injects cleaning water toward the suction port of the throat pipe to induce the jet pump action. Even if it exists, disorder of the wash water in the small space which the wash water which passes through the opening part of a division wall and a division wall forms can be suppressed. Therefore, since the switching valve can be stably operated in the small space of the partition wall, the large and small washing water can be stably supplied to the toilet body.

In the present invention, preferably, the partition wall is short in the front-rear direction and the first partition wall portion that is long in the left-right direction so that the small space is formed in a flat shape that is long in the left-right direction of the water storage tank in plan view. A second partition wall is provided, and the opening and the switching valve are provided on the first partition wall that is long in the left-right direction.
In the present invention thus configured, the small space is long in the left-right direction of the water storage tank in a plan view by the first partition wall portion long in the left-right direction of the partition wall and the second partition wall portion short in the front-rear direction. Since it can be formed in a flat shape, the front and rear widths of the water storage tank can be reduced, and the front and rear lengths of the entire flush toilet apparatus can be shortened and reduced in size. In addition, since the opening and the switching valve are provided on the first partition wall that is long in the left-right direction of the partition wall, and the opening is directed in a direction other than the jet nozzle, the jet that discharges cleaning water with high momentum The switching valve can be made less susceptible to the influence of the nozzle. Therefore, the switching valve can be stably operated, and the large and small washing water can be stably supplied to the toilet body.

In the present invention, it is preferable that the opening is formed in a flat shape that is long in the left-right direction on the first partition wall of the partition wall, and the switching valve can be closed in the left-right direction so that the opening can be closed when the valve is closed. It is formed in a long flat shape.
In the present invention configured as described above, since the small space of the partition wall is formed in a flat shape that is long in the left-right direction of the water storage tank in plan view, the level of the wash water stored in the partition wall is Even when the head pressure is relatively low, the opening is formed in a flat shape that is long in the left-right direction on the first partition wall of the partition wall, and the opening can be closed when the switching valve is closed When the switching valve closes the opening, the water pressure of the washing water acts stably throughout the flat switching valve that is long in the left-right direction. The switching valve can stably close the opening. On the other hand, when the switching valve opens the opening, the cleaning water in the partition wall can be reliably discharged from the flat opening that is long in the left-right direction. In addition, the entire water storage tank can be reduced in size.

In the present invention, it is preferable that the partition wall partitions the inside of the water storage tank into the small space and an outer space formed outside the small space, with respect to the small space in the outer space. The jet nozzle is arranged in one of the left and right regions.
In the present invention configured as described above, the partition wall divides the inside of the water storage tank into a small space and an outer space formed outside the small space. In addition, since the jet nozzle is arranged in one of the left and right regions, the entire water storage tank can be reduced in size. Further, since the jet nozzle is arranged in the outer space partitioned by the partition wall with respect to the small space in which the switching valve is opened and closed, the jet nozzle urges the cleaning water toward the suction port of the throat pipe. Even when jetting well and inducing the jet pump action, it is possible to suppress the disturbance of the washing water passing through the opening of the partition wall and the washing water in the small space. Therefore, since the switching valve can be stably operated in the small space of the partition wall, the large and small washing water can be stably supplied to the toilet body.

In the present invention, preferably, the opening and the switching valve are arranged in a state of being biased toward the side where the jet nozzle is arranged in the first partition wall of the partition wall.
In the present invention configured as described above, since the opening and the switching valve are disposed in a state of being biased toward the side where the jet nozzle is disposed in the first partition wall portion of the partition wall, Sometimes the switching valve can open the opening to reliably drain the water in the partition wall. Therefore, large washing water can be stably supplied to the toilet body, and the entire water storage tank can be reduced in size.

In the present invention, it is preferable that the switching valve includes a valve portion that opens and closes the opening on the small space side, and a support portion that extends obliquely downward from the valve portion in the small space and supports the valve portion. The lower portion in the small space inside the opening is provided with an attachment portion to which the support portion of the switching valve is rotatably attached, and the support portion of the changeover valve is the attachment portion. The valve portion is configured to open and close the opening by rotating about a predetermined rotation axis.
In the present invention configured as described above, the support portion of the switching valve attached to the attachment portion of the lower region in the small space formed by the partition wall extends obliquely downward in the small space from the valve portion, and has an opening. Since it is rotatably attached to the attachment part provided in the lower area in the small space inside the part, the position of the opening can be positioned below the small space. Therefore, at the time of large washing, the switching valve can open the opening and discharge the water in the partition wall more reliably. Moreover, since the small space which a partition wall forms can be made small, the whole water storage tank can be reduced in size.

In the present invention, it is preferable that the support portion is provided on the bottom surface of the small space formed by the partition wall so that the support portion of the switching valve can rotate around a predetermined rotation axis of the attachment portion. A recess is formed to receive the lower end of the slidably movable portion.
In the present invention configured as described above, a recess is formed on the bottom surface of the small space formed by the partition wall so as to swingably receive the lower end portion of the support portion of the switching valve. Since the rotation area can be set below the small space, the position of the opening can be positioned below the small space. Therefore, at the time of large washing, the switching valve can open the opening and discharge the water in the partition wall more reliably. Moreover, since the small space which a partition wall forms can be made small, the whole water storage tank can be reduced in size.

  According to the flush toilet apparatus of the present invention, the entire water storage tank can be reduced in size, the switching valve can be stably operated, and large and small wash water can be stably supplied to the toilet body. .

It is a top view which shows the flush toilet apparatus by one Embodiment of this invention. It is sectional drawing seen along the II-II line of FIG. It is a top view which shows the internal structure of the washing water tank apparatus of the flush toilet apparatus by one Embodiment of this invention. It is a front view which shows the internal structure of the washing water tank apparatus of the flush toilet apparatus by one Embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4, and the switching valve of the large / small washing switching mechanism is opened when the washing water tank device of the flush toilet device according to the embodiment of the present invention is stopped before starting washing. Indicates the state of FIG. 6 is a cross-sectional view similar to FIG. 5, showing a state in which the switching valve of the large / small washing switching mechanism is closed when the washing water tank apparatus of the flush toilet apparatus according to the embodiment of the present invention is little washed. It is a conceptual diagram which shows the washing water tank apparatus of the flush toilet apparatus by one Embodiment of this invention. It is the perspective view seen from diagonally back about the small tank provided in the water storage tank of the flush water tank apparatus of the flush toilet apparatus by one Embodiment of this invention, and was formed of the partition wall. It is a top view which shows the small tank provided in the water storage tank of the flush water tank apparatus of the flush toilet apparatus by one Embodiment of this invention, and was formed of the partition wall. It is a perspective view which shows the switching valve of the flush toilet apparatus by one Embodiment of this invention. It is the expansion perspective view which expanded the support part of the switching valve in the small tank of the flush toilet apparatus by one Embodiment of this invention, and the attaching part to which this support part is attached. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the large washing by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention. It is a conceptual diagram of the internal structure of the washing water tank apparatus for demonstrating the operation | movement at the time of the small washing | cleaning by the flush toilet apparatus by one Embodiment of this invention.

Hereinafter, a flush toilet apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the basic structure of a flush toilet apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a plan view showing a flush toilet apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

As shown in FIGS. 1 and 2, a flush toilet device 1 according to an embodiment of the present invention includes a toilet body 2 and a wash water tank device 4 that supplies wash water to the toilet body 2.
The toilet body 2 includes a bowl portion 6 provided on the front side thereof, a rim portion 8 formed on the upper edge of the bowl portion 6, and a shelf portion 10 formed on the inner periphery of the rim portion 8. ing.
Further, an inlet 12a of the trap drainage channel 12 is opened at the bottom of the bowl portion 6 of the toilet body 2, and the trap drainage channel 12 is provided with an ascending pipe 12b extending upward and a descending pipe 12c extending downward. . As can be seen from the shape of the trap drain 12, the flush toilet apparatus 1 according to this embodiment is a wash-out toilet that discharges filth by a drop in the height direction.
In addition, in this embodiment, although the form applied to the wash-out type toilet is explained, it is not limited to such a form, and the filth in the bowl part is sucked in using the siphon action and is immediately discharged from the drain trap pipe. It can be applied to other flush toilets such as a so-called siphon toilet.

Next, the toilet body 2 includes a water conduit 16 into which wash water discharged from the drain port 14 of the wash water tank device 4 flows, and a first rim spout formed at the left center when viewed from the front of the shelf 10. 18 and a second rim spout 20 formed at the rear right side when viewed from the front.
In addition, the water conduit 16 branches downstream into the first water conduit 22 and the second water conduit 24, and the wash water in the water conduit 16 reaches the first rim spout 10 through the first water conduit 22. The second rim water discharge port 20 is reached via the second water passage 24, and the wash water is discharged from the first rim water discharge port 18 and the second rim water discharge port 20, respectively, and the bowl portion 6 is washed to remove filth. It is discharged from the trap drain 12.

Next, the washing water tank apparatus 4 will be described in detail with reference to FIGS.
FIG. 3 is a plan view showing an internal structure of a flush water tank apparatus of a flush toilet apparatus according to an embodiment of the present invention, and FIG. 4 is a flush water tank apparatus of the flush toilet apparatus according to an embodiment of the present invention. It is a front view which shows the internal structure of.
FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, and switching between large and small washing is performed when the washing water tank apparatus of the flush toilet apparatus according to one embodiment of the present invention is stopped before washing. The state where the switching valve of the mechanism is opened is shown. On the other hand, FIG. 6 is a cross-sectional view similar to FIG. 5 and shows a state in which the switching valve of the large / small washing switching mechanism is closed during the small washing of the washing water tank apparatus of the flush toilet apparatus according to one embodiment of the present invention. Show.
Furthermore, FIG. 7 is a conceptual diagram showing a flush water tank apparatus of a flush toilet apparatus according to an embodiment of the present invention.
In FIG. 7, for the sake of convenience, a part of the internal structure of the washing water tank apparatus shown in FIGS. 3 and 4 is omitted, and some arrangements of the structures are also shown in FIGS. It is drawn in a different arrangement.

As shown in FIGS. 3 to 7, the cleaning water tank device 4 is formed in a flat shape that is long in the left-right direction in a plan view, and stores the cleaning water, and supplies the cleaning water to the water storage tank 26. A water supply pipe 28, a water supply valve device 30 provided in the water supply pipe 28, a jet pump unit 32 provided at the downstream end of the water supply pipe 28 for supplying flush water to the toilet body 2, A manual lever 34 is provided for a person to supply cleaning water manually.
At the upstream end of the water supply pipe 28, there is provided a stop cock 36 for stopping washing water supplied from a water supply source (not shown) such as an external water pipe. The stop cock 36 is for stopping water supply from a water supply source (not shown) when the flush toilet device 1 is installed, and is kept open during normal use.

The jet pump unit 32 includes a throat pipe 38 formed in a generally inverted V shape having an ascending pipe part 38a extending obliquely upward from below and a descending pipe part 38b extending downward from the vicinity of the upper end of the ascending pipe part 38a. And a jet nozzle 40.
Specifically, a suction port 38c is formed at the upstream end of the ascending pipe portion 38a, and the suction port 38c is positioned at the lower part in the water storage tank 26. The downstream end is connected to a drain port 14 communicating with the water conduit 16 of the toilet body 2.
Further, the jet nozzle 40 is disposed so as to face the suction port 38 c of the throat pipe 38, and the suction port 38 c and the jet nozzle 40 of the throat pipe 38 are always submerged in the water storage tank 26.

The jet pump unit 32 injects high-speed washing water from the jet nozzle 40 toward the suction port 38c of the throat pipe 38. At this time, the space near the suction port 38c in the throat pipe 38 near the jet nozzle 40 is negative pressure. By inducing the jet pump action (ejector effect) by this negative pressure, the washing water in the vicinity of the water storage tank 26 is sucked, and the washing water and the washing water ejected from the jet nozzle 40 are combined. The water flows through the throat pipe 38 and is supplied to the water conduit 16 of the toilet body 2 through the drain port 14.
That is, for the term “jet pump action” described in the present specification, the flow of the washing water having a momentum injected from the jet nozzle toward the suction port of the throat pipe itself is used for other pumps or the like. Without depending on the mechanical elements, a negative pressure is created that directly draws the cleaning water in the vicinity of the suction port of the throat pipe, etc., and the inside of the water storage tank sucked into the throat pipe using this negative pressure It means the action of pumping wash water to the toilet body side.

  In addition to the water supply valve device 30 described above, the water supply line 28 is provided with a constant flow valve 42 on the upstream side of the water supply valve device 30 and a vacuum breaker valve 44 on the downstream side. This constant flow valve 42 is for making the washing water supplied to the water supply valve device 30 have a constant flow rate, and the vacuum breaker valve 44 sucks air from the outside and from the vacuum breaker valve 44 to the jet nozzle 40. This is to prevent the connection pipe 46 from becoming negative pressure.

The water supply valve device 30 includes a main valve body 48 that is a pilot-type diaphragm valve, a main valve seat 50 on which the main valve body is seated, and a pressure that moves the main valve body 48 relative to the main valve seat 50 by internal pressure. The main valve body 28 is configured to switch between a water stop state in which the main valve body 28 is seated on the main valve seat 50 to stop water and a water supply state in which water is supplied away from the main valve seat 50.
The pressure chamber 52 includes a first hole 54 and a second hole 56 that release the pressure in the pressure chamber 52, and a first hole 54 that opens and closes the first hole 54 in conjunction with the user's manual operation on the manual lever 34 described above. A pilot valve 58 and a second pilot valve 62 that opens and closes the second hole 56 by a vertical movement of a float 60 that moves up and down with the level of the washing water in the water storage tank 26 are provided.

  In addition, the main valve body 48 is provided with a bleed hole (not shown), and when the water is stopped, the bleed hole (not shown) causes the primary side flow path A and the pressure chamber 52 of the water supply pipe line 28 to pass through. It is designed to communicate with the inside. Here, the opening area of the first hole 54 is larger than the opening area of the second hole 56. The first hole 54 is formed at an upper position than the second hole 56 as shown in FIG.

  The first pilot valve 58 is connected to the manual lever 34 by a drive shaft 64, and opens and closes the first hole 54 by manual operation of the user's manual lever 34. Here, in FIG. 4, the manual lever 34 is largely washed as described later when rotated to the near side (one direction), and small when rotated to the far side (the other direction). Cleaning is to be done.

  The water supply valve device 30 is normally in a water stop state. In the water stop state, both the first hole 54 and the second hole 56 are closed, and the primary side flow path A of the water supply pipe line 28 is Since the pressure chamber 52 and the bleed hole (not shown) communicate with each other, the water pressure in the primary side channel A and the pressure chamber 52 is the same water pressure (primary side channel pressure α), and the secondary side channel B is in the atmosphere. Since the area where the water pressure acts on the main valve body 48 is larger than the area of the primary flow path A, the main valve body 48 is pressed against the main valve seat 50 and closed.

  In the water supply valve device 30, when the first hole 54 and / or the second hole 56 are opened by the first pilot valve 58 and / or the second pilot valve 62, the washing water flows out from the pressure chamber 52, and the pressure chamber The pressure in 52 falls, the main valve body 48 moves so that it may leave | separate from the main valve seat 50, it opens, and it will be in the water discharge state.

In the water supply valve device 30, when the first hole 54 and the second hole 56 are closed by the first pilot valve 58 and the second pilot valve 62, the pressure in the pressure chamber 52 becomes the primary channel pressure α again, and the main valve body 48 moves toward the main valve seat 50 and finally becomes a closed state (water stoppage state).
At this time, since the cleaning water of the primary side flow path A is gradually injected into the pressure chamber 52 from the bleed hole, the main hole 54 and the second hole 56 are blocked, and then the main water is delayed by a predetermined time. The valve body 48 becomes a valve closing state (water stop state).

Next, as shown in FIG. 7, near the lower end of the throat pipe 38, a switching valve 66 for switching between jet water discharge and tank water storage and a float 68 attached to the switching valve 66 are provided. Since the float 68 moves up and down depending on the water level in the water storage tank 26, the float 68 also descends when the water level becomes low, so that the switching valve 66 blocks the flow path in the throat pipe 38. (See FIGS. 12C and 13C described later).
Further, in a state where the flow path in the throat pipe 38 is blocked, the washing water jetted from the jet nozzle 40 collides with the switching valve 66 and flows into the water storage tank 26 without flowing through the throat pipe 38. The water is stored in the water storage tank 26. Further, when the predetermined water level is reached and the water storage is completed, the float 68 also rises, whereby the switching valve 66 opens the flow path in the throat pipe 38 (FIGS. 12 (A) and 13 (13)). A)).
On the other hand, in a state where the flow path in the throat pipe 38 is opened, the washing water sprayed from the jet nozzle 40 flows through the throat pipe 38 and is supplied to the toilet body 2.

Further, in the water storage tank 26, a large / small washing switching mechanism 70 is provided for switching the amount of washing water required for large washing and small washing. The large / small washing switching mechanism 70 includes two spaces, an outer space region R1 that surrounds the jet nozzle 40 and the suction port 38c of the throat pipe 38 in the water storage tank 26, and a small space region R2 that has a smaller space than the outer space region R1. A partition wall 72 partitioned into regions R1 and R2 is provided.
More specifically, the partition wall 72 forms a wall surface extending in the vertical direction, and the upper portion thereof is opened to form a cup-shaped small tank 74 surrounded from four sides in the front-rear direction and the left-right direction. The small tank 74 is disposed forward and to the left in the water storage tank 26, and the small space region R2 has a flat shape that is long in the left-right direction of the water storage tank 26 in plan view. Is formed.
Therefore, the suction port 38c of the jet nozzle 40 and the throat pipe 38 is disposed forward and to the right in the outer space region R1 formed on the right side outside the small tank 74 and the small space region R2 when the water storage tank 26 is viewed from the front side. (See FIGS. 3 to 5).
In the present embodiment, the small tank 7 is disposed forward and to the left in the water storage tank 26, and the suction port 38c of the jet nozzle 40 and the throat pipe 38 is a small tank 74 when the water storage tank 26 is viewed from the front side. In addition, a description will be given of a form that is disposed forward and to the right in the outer space region R1 that is formed on the outer right side of the small space region R2, but is not limited to such a form, and the suction ports of the jet nozzle 40 and the throat pipe 38 38c should just be arrange | positioned in the outer space area | region R1 formed in either one of right and left with respect to the small tank 74 and small space area | region R2.

In addition, in this embodiment, about the form which forms small space area | region R2 in the water storage tank 26 by arrange | positioning in the water storage tank 26 the small tank 74 by which the four sides were formed by the partition wall 72 at the cup shape. As will be described, the present invention is not limited to such a configuration, and the partition wall 72 may be formed integrally with a part of the water storage tank 26 to form the small space region R2 in the water storage tank 26.
In the present embodiment, as shown in FIGS. 5 and 6, a mode in which the outer bottom surface 74 a of the small tank 74 and the inner bottom surface 26 a of the water storage tank 26 are in contact with each other will be described. However, the present invention is not limited to this, and the outer bottom surface 74a of the small tank 74 may be positioned above the inner bottom surface 26a of the water storage tank 26 with a space therebetween.

  In addition, although details will be described later, a rectangular-shaped opening 72b that is long in the left-right direction is formed in the rear partition wall (rear partition wall) 72a of the small tank 74 so as to penetrate in the front-rear direction. The opening 72b is provided with a switching valve 76 that can be opened and closed. The switching valve 76 opens and closes the opening 72b to change the amount of washing water supplied to the toilet body 2 through the jet pump unit 32. It is possible to switch between large washing and small washing.

The switching valve 76 of the large / small cleaning switching mechanism 70 is connected to the drive shaft 64 by a chain 78. When the manual lever 34 is rotated in one direction by the user to perform large cleaning, the switching valve 76 is driven. Even if the shaft 64 rotates, the chain 78 only sags, the switching valve 76 remains open, and the large / small cleaning switching mechanism 70 enters the large cleaning state.
On the other hand, when the manual lever 34 is turned in the other direction by the user to perform small cleaning, the switching valve 76 is pulled up by the chain 78 and the switching valve 76 closes the opening 74. The large / small cleaning switching mechanism 70 is in a small cleaning state.

  Next, an overflow pipe 80 is provided in the water storage tank 26 so as to extend in the vertical direction adjacent to the descending pipe portion 38 b of the throat pipe 38 of the jet pump unit 32. The wash water in which the water level in the water storage tank 26 rises above the stop water level and exceeds the position of the upper end opening (replenishment water port) 80a of the overflow pipe 80 flows into the overflow pipe 80 and communicates with the drain port 14. The outlet pipe 80 b at the lower end of the overflow pipe 80 is supplied as makeup water to the water conduit 16 of the toilet body 2.

In addition, as shown in FIGS. 5-7, the water level WL in the water storage tank 26 becomes the following positions.
First, as shown in FIGS. 5 and 7, the water level WL1 indicates a dead water level DWL that is the lowest water level in both the regions R1 and R2 in the water storage tank 26 when the large cleaning is completed. Further, as shown in FIGS. 6 and 7, the water level WL1 is also a dead water level DWL only in the region R1 in the water storage tank 26 when the small washing is finished, and the water level that is the dead water level DWL WL1 is positioned below the upper end of the opening 74 of the partition wall 72.
Next, as shown in FIGS. 6 and 7, the water level WL2 indicates the water level in the region R2 in the water storage tank 26 when the small cleaning is completed.
Moreover, as shown in FIGS. 5-7, the water level WL3 is the water stop water level in the initial state of the wash water stored in the water storage tank 26, and is a normal level before or after use of the flush toilet apparatus 1. The still water level is shown and is located slightly above the water level WL2.
Further, as shown in FIGS. 5 and 7, the water level WL4 is immediately after the cleaning water is supplied into the water storage tank 26 by the water supply valve device 30 after the large cleaning or the small cleaning, and then the water supply is stopped (and before the supply of the cleaning water). It is the water level which shows the still water stop condition.

Next, the small tank 74 and the switching valve 76 will be described in detail with reference to FIGS.
FIG. 8 is a perspective view of a small tank that is provided in a water storage tank of a flush water tank device of a flush toilet apparatus according to an embodiment of the present invention and is formed by a partition wall, as viewed obliquely from the rear. FIG. 3 is a plan view showing a small tank formed by a partition wall provided in a water storage tank of a flush water tank device of a flush toilet apparatus according to an embodiment of the present invention.
FIG. 10 is a perspective view showing the switching valve of the flush toilet apparatus according to one embodiment of the present invention, and FIG. 11 shows the switching valve in the small tank of the flush toilet apparatus according to one embodiment of the present invention. It is the expansion perspective view which expanded the attaching part to which a support part and this support part are attached.

  First, as shown in FIGS. 8 and 9, the partition wall 72 of the small tank 74 is long in the left-right direction so that the small space region R2 is formed in a flat shape that is long in the left-right direction of the water storage tank 26 in plan view. The side partition wall 72a and the front partition wall 72c and the rear partition wall 72a and the front partition wall 72c are formed to be shorter in the front-rear direction of the water storage tank 26 and in the left-right direction when viewed from the front of the small tank 74. A left partition wall 72d and a right partition wall 72e are provided.

  The upper end 72f of the partition wall 72 is set to a position higher than the water stop water level WL3 in the initial state of the wash water stored in the water storage tank 26 (see FIGS. 4 to 7). As a result, even when the water stop level WL3 in the initial state of the wash water stored in the water storage tank 26 varies due to variations in the water level in the water storage tank 26 during the water supply, the toilet body 2 The variation width of the amount of cleaning water supplied to the can be reduced.

Next, the rear partition wall 72a that is long in the left-right direction of the small tank 74 is formed so that an opening 72b having a flat shape that is long in the left-right direction and having a substantially rectangular opening cross-sectional shape penetrates in the front-rear direction. That is, since the opening 72b is directed rearward from the small space region R2 in the small tank 74 toward the inner and outer space region R1 of the water storage tank 26, and in front of the outer space region R1 in the water storage tank 26 and The jet nozzle 40 disposed on the right side and the suction port 38c of the throat pipe 38 are directed in a different direction (see FIGS. 3 to 5 and 8). Accordingly, even when the jet nozzle 40 vigorously injects cleaning water toward the suction port 38c of the throat pipe 38 to induce the jet pump action, the opening 72b of the partition wall 72 of the small tank 74 is provided. The turbulence of the cleaning water passing through the partition wall 72 and the cleaning water in the small space region R2 formed by the partition wall 72 can be suppressed.
In the present embodiment, the direction in which the opening 72b formed in the rear partition wall 72a of the small tank 74 is directed is not limited to the front-rear direction, and the positions of the jet nozzle 40 and the suction port 38c of the throat pipe 38 are not limited. Accordingly, it is only necessary to point in a direction different from the direction of these positions.

  Further, the opening 72b of the small tank 74 is disposed on the right side of the lower center portion of the rear partition wall 72a when the rear partition wall 72a is viewed from the front, and the suction port 38c of the jet nozzle 40 and the throat pipe 38 is disposed. It is arranged in a state of being biased to the side where is arranged. Thereby, at the beginning of the small cleaning, the switching valve 76 can be pulled in the direction of closing the opening 72b by the momentum of the water sprayed from the jet nozzle 40, and then the partition wall of the small tank 74 at the time of the small cleaning. The switching valve 76 can be reliably pressed against the opening 72b by the water pressure of the washing water stored in the 72. Further, at the time of large washing, the switching valve 76 can open the opening 72b of the small tank 74 to reliably discharge the water in the partition wall 72 of the small tank 74, so that the large washing water can be stably discharged. Can be supplied to. Furthermore, since the small tank 74 can be reduced in size, the entire water storage tank 26 can also be reduced in size.

Next, the switching valve 76 is provided in the small space region R2 of the small tank 74, and the opening 72b can be opened and closed in the small space region R2.
The structure of the switching valve 76 will be described in more detail. The switching valve 76 is a flat and long shape that opens and closes the opening 72b of the small tank 74 in the small space region R2 and can close the opening 72b when the valve is closed. A valve portion 76a formed in a shape, and a pair of support portions 76b and 76c that support the valve portion 76a by extending obliquely downward from near the lower ends of both sides of the front surface of the valve portion 76a into the small space region R2. (Refer to FIG. 10 and FIG. 11).
In addition, each of the support portions 76b and 76c of the switching valve 76 is rotatable on the inner bottom surface 74b of the small tank 74 formed in the lower region in the small space region R2 inside the opening 72b of the small tank 74. Attachment portions 74c and 74d attached to the projections are respectively formed in a protruding shape protruding upward. The pair of attachment portions 74c and 74d are disposed to face each other in the left-right direction, and include support shafts 74e and 74f that protrude inward in a cylindrical shape so as to face each other in the left-right direction. Furthermore, attachment holes 76d and 76e respectively formed near the lower ends of the support portions 76b and 76c of the switching valve 76 are inserted and attached to the support shafts 74e and 74f. 76b and 76c rotate about a rotation axis C1 corresponding to a center axis corresponding to each of the support shafts 74e and 74f of the mounting portions 74c and 74d, so that the valve portion 76a opens the opening 72b in a small space. It opens and closes on the region R2 side (see FIGS. 5, 6, and 9 to 11).

  In the present embodiment, the attachment portions 74c, 74d of the inner bottom surface 74b of the small tank 74 and the support portions 76b, 76c of the switching valve 76 are attached to each attachment portion of the inner bottom surface 74b of the small tank 74. The support shafts 74e and 74f of 74c and 74d are male side members, and the support portions 76b and 76c of the switching valve 76 for forming the mounting holes 76d and 76e into which the support shafts 74e and 74f are inserted are female side members. However, it may be a form in which the male side and the female side are interchanged with each other. That is, a support shaft is provided on each support portion 76b, 76c of the switching valve 76 to provide a male side member, and mounting holes inserted into these support shafts are formed in the mounting portions 74c, 74d of the inner bottom surface 74b of the small tank 74. It is good also as a female side member by forming.

  Further, on the inner bottom surface 74b of the small tank 74, the support portions 76b and 76c of the switching valve 76 are rotatable about the rotation axis C1 of the support shafts 74e and 74f of the attachment portions 74c and 74d. In addition, recesses 74g and 74h that respectively receive the lower end portions of the support portions 76b and 76c in a swingable manner are formed (see FIGS. 9 and 11). Thereby, since the rotation area | region of the support parts 76b and 76c of the switching valve 76 can be set below in the small space area | region R2 of the small tank 74, the position of the opening part 72b is located below the small space area | region R2. It can be made to. Therefore, the switching valve 76 can open the opening 72b and discharge the water in the partition wall 72 of the small tank 74 more reliably during the large cleaning. Moreover, since the small space area | region R2 itself which the partition wall 72 of the small tank 74 forms can also be made small, the whole water storage tank 26 can be reduced in size.

  Further, the switching valve 76 is pressed against the opening 72b by the water pressure of the washing water stored in the small space region R2 of the small tank 74 with the valve 76a closing the opening 72b. Is set at a position lower than the water stop level WL3. Accordingly, it is possible to reliably prevent the cleaning water in the partition wall 72 of the small tank 74 from flowing out from the opening 72b during the small cleaning, and to reduce the variation width of the amount of the cleaning water supplied to the toilet body 2 during the small cleaning. The size can be reduced, and stable small cleaning can be performed.

Operation | movement at the time of the big washing | cleaning by the flush toilet apparatus 1 by this embodiment is demonstrated using FIG. 12A-FIG. 12F.
First, FIG. 12A shows the cleaning water tank apparatus 4 before the start of large cleaning. In this state, the water level in the water storage tank 26 is the water level WL3 in the normal state. In the water supply valve device 30, both the first hole 54 and the second hole 56 are closed, and the main valve body 48 is the main valve seat. It sits on 50 and is in a water-stopping state.

  Next, FIG. 12B shows the cleaning water tank device 4 when the user manually operates the manual lever 34 in one direction and large cleaning is started. When the user manually operates the manual lever 34 in one direction, the drive shaft 64 connected to the manual lever 34 rotates, the first pilot valve 58 of the water supply valve device 30 is activated, and the first hole 54 is opened. At this time, the second hole 56 remains closed. Even when the drive shaft 64 rotates, the chain 78 only sags, the switching valve 76 remains in the state in which the opening 72b of the small tank 74 is opened, and the large / small washing switching mechanism 70 enters the large washing state.

  If the 1st hole 54 opens, as mentioned above, it will be in the water supply state which the main valve body 48 of the water supply valve apparatus 30 separates from the main valve seat 50, and supplies water. Wash water supplied from an external water supply source reaches the jet nozzle 40 at the downstream end of the water supply pipe 28 via the stop cock 36, the constant flow valve 42, and the water supply valve device 30, and from the jet nozzle 40 to the throat pipe Washing water is jetted toward the suction port 38c of 38. Since the vicinity of the suction port 38c of the throat pipe 38 has a negative pressure, the cleaning water stored in the water storage tank 26 is also sucked into the throat pipe 38 and supplied from the outside by the cleaning water tank device 4 and the water storage tank. The wash water in 26 flows together in the throat pipe 38 and is supplied to the toilet body 1, and the bowl 6 is started to be washed.

  When large cleaning is continued in the state of FIG. 12B, the state shown in FIG. 12C is then obtained. FIG. 12C shows a state during the large cleaning. When the large cleaning is continued, the water level WL in the water storage tank 26 decreases. Thereby, the float 60 of the water supply valve device 30 is also lowered. As soon as the float 60 starts to descend, the second pilot valve 62 is actuated, thereby opening the second hole 56. At this time, the first hole 54 is in a closed state, but the second hole 56 is kept open until the state shown in FIG. 12E described later.

  If the 2nd hole 56 opens, the water supply state in the water supply valve apparatus 30 will be continued irrespective of the opening / closing state of the 1st hole 54. FIG. For this reason, when the operation time of the manual lever 34 by a user is short, the state which the 1st hole 54 opened becomes short time, a water supply state is not continued, and the problem that a large washing is not performed is solved. be able to. As described above, in the present embodiment, the second hole 56 is provided in addition to the first hole 54, and the second pilot valve 64 is operated by the float 60 that moves in conjunction with the water level in the water storage tank 26. Since the hole 56 is opened so that the large cleaning can be continued, the large cleaning can be surely executed regardless of the operation time of the manual lever 34.

  If the 2nd hole 56 opens, the water supply state in the water supply valve apparatus 30 will continue, and the water level WL in the water storage tank 26 will fall to the water level WL1 of the lower end of the opening part 74 of the partition wall 72 of the large and small washing switching mechanism 70. At this time, the float 68 is also lowered to the position of the water level WL1 in conjunction with the lowering of the water level, whereby the switching valve 66 is operated to block the flow path of the throat pipe 38. Thereby, the water supply to the toilet body 2 of the washing water in the large washing is completed.

  When the flow path of the throat pipe 38 is blocked by the switching valve 66, as shown in FIG. 12D, the cleaning water sprayed from the jet nozzle 40 collides with the switching valve 66 without flowing through the throat pipe 38. The water flows into the water storage tank 26 and is stored in the water storage tank 26. At this time, the water level in the water storage tank 26 rises, but the switching valve 66 cannot move due to the momentum of the washing water, so the float 68 is also held at that position without being raised. Further, the float 60 of the water supply valve device 30 rises in conjunction with the rise of the water level, but the second hole 56 remains open, and the water supply state by the water supply valve device 30 is thereby continued. .

  Next, when the water supply state is continued and the water level of the water storage tank 26 rises and reaches the water level WL3, the float 60 also rises to the water level WL3 as shown in FIG. 12E. The pilot valve 62 operates and the second hole 56 is closed.

  Next, in the water supply valve device 30, when the first hole 54 and the second hole 56 are closed, as described above, the pressure in the pressure chamber 52 becomes the primary side passage pressure α, and the main valve body 48 is moved to the main valve seat 48. It moves toward 50 and it will be in the state (water stoppage state) finally closed. However, at this time, since the cleaning water of the primary side flow path A is injected little by little from the bleed hole (not shown) into the pressure chamber 52, the first hole 54 and the second hole 56 are blocked, and then the predetermined water is supplied. After a time delay, the main valve body 48 is closed (water-stopped state). For this reason, even after the second hole 56 is closed, as shown in FIG. 12F, the water level in the water storage tank 26 rises, and after a predetermined time has passed, the water level becomes the water level WL4. Becomes water-stopped and water supply ends.

During the state shown in FIG. 12E to the state shown in FIG. 12F, the water level in the water storage tank 26 rises from the water level WL3 to the water level WL4. At this time, since the water level in the water storage tank 26 is above the upper end opening 80 a of the overflow pipe 80, the wash water in the water storage tank 26 enters the overflow pipe 80 from the upper end opening 80 a of the overflow pipe 80. It flows in and is supplied to the toilet body 1 as makeup water.
It should be noted that during the state shown in FIG. 12E to the state shown in FIG. 12F, the water level in the water storage tank 26 continues to rise because the flow rate of water supplied from the water supply valve device 30 to the water storage tank 26 increases from the water storage tank 26 to the overflow pipe. This is because the flow rate is larger than the flow rate flowing into 80.

  Furthermore, as shown in FIG. 12F, after the water supply valve device 30 stops the water and the water level rises to WL4, the wash water between the water level WL3 and the water level WL4 flows into the overflow pipe 80 and flows into the overflow pipe 80. From the outlet 80b and supplied to the toilet body 1 from the drain outlet 14 as makeup water. Thus, the amount of makeup water that flows into the overflow pipe 80 is between the amount of cleaning water that is replenished while the water level rises from WL3 to WL4 and the water level WL3 and the water level WL4 that are replenished after the water stop state is reached. It is the sum of the amount of washing water.

  When the supply of the wash water to the toilet body 2 is completed, the water level in the water storage tank 26 becomes the position WL3, the state of FIG. 12A is returned, and the large washing is completed.

  The operation | movement at the time of the small washing | cleaning by the flush toilet apparatus 1 by this embodiment is demonstrated using FIG. 13A-FIG. 13F. The operation at the time of the small cleaning will be described focusing on the difference from the operation at the time of the large cleaning described above. First, FIG. 13A shows the cleaning water tank device 4 before the start of small cleaning. In this state, the water supply valve device 30 is in a water stop state.

  Next, FIG. 13B shows the cleaning water tank device 4 when the user manually operates the manual lever 34 in the other direction and the small cleaning is started. When the user manually operates the manual lever 34 in the other direction, the drive shaft 64 connected to the manual lever 34 rotates, the first pilot valve 58 of the water supply valve device 30 is activated, and the first hole 54 is opened. At this time, the second hole 56 remains closed. Since the cleaning is small, the chain 78 is wound up by the rotation of the drive shaft 64, and the valve portion 76a of the switching valve 76 closes the opening 72b of the small tank 74 due to the differential pressure inside and outside the partition wall 72. Thus, the large / small cleaning switching mechanism 70 is in the small cleaning state.

  If the 1st hole 54 opens, it will be in the water supply state which the main valve body 48 of the water supply valve apparatus 30 separates from the main valve seat 50, and supplies water. At this time, since the wash water stored in the water storage tank 26 is also sucked into the throat pipe 38, the wash water supplied from the outside by the wash water tank device 4 and the wash water in the water storage tank 26 are combined. It flows through the throat pipe 38 and is supplied to the toilet body 1, and cleaning of the bowl portion 6 is started.

  When the small cleaning is continued in the state of FIG. 13B, the state shown in FIG. 13C is then obtained. FIG. 13C shows a state during the small cleaning. When the small cleaning is continued, the water level WL in the outer space region R1 in the water storage tank 26 decreases. Thereby, the float 60 of the water supply valve device 30 is also lowered. As soon as the float 60 starts to descend, the second pilot valve 62 is actuated, thereby opening the second hole 56. At this time, the first hole 54 is in a closed state, but the second hole 56 is kept open until the state shown in FIG.

  When the second hole 56 is opened, the water supply state in the water supply valve device 30 is continued regardless of the open / closed state of the first hole 54. For this reason, the small cleaning can be surely executed regardless of the operation time of the manual lever 34.

If the 2nd hole 56 opens, the water supply state in the water supply valve apparatus 30 will continue, and the water level WL in the water storage tank 26 will fall from the water stop water level WL3. At this time, the state in which the valve portion of the switching valve 76 closes the opening 72b of the small tank 74 is maintained, so that the water level WL2 in the small tank 74 is maintained at a level slightly lower than the stop water level WL3. The
Further, as shown in FIG. 13C, the water level in the outer space region R1 in the water storage tank 26 decreases to the water level WL1 (dead water level DWL) in the vicinity of the jet nozzle 40, and the float 68 also moves in conjunction with the lowering of the water level. The position is lowered to the position of WL1, whereby the switching valve 66 operates to close the flow path of the throat pipe 38. Thereby, the water supply to the toilet body 2 of the washing water in the small washing is finished.

  Further, when the flow path of the throat pipe 38 is blocked by the switching valve 66, as shown in FIG. 13D, the cleaning water sprayed from the jet nozzle 40 collides with the switching valve 66 and flows through the throat pipe 38. Instead, it flows into the water storage tank 26 and is stored in the water storage tank 26. At this time, the water level in the water storage tank 26 rises.

  Next, when the water supply state is continued and the water level of the water storage tank 26 rises and reaches the water level WL3, the float 60 also rises to the water level WL3 as shown in FIG. 13E. The pilot valve 62 operates and the second hole 56 is closed.

  Next, in the water supply valve device 30, when the first hole 54 and the second hole 56 are closed, the water stop state is established. However, at this time, after closing the first hole 54 and the second hole 56, the main valve body 48 is in a closed state (water stoppage state) with a predetermined time delay. Therefore, even after the second hole 56 is closed, as shown in FIG. 13F, the water level in the water storage tank 26 rises, and after a predetermined time has passed, the water level becomes the water level WL4. Becomes water-stopped and water supply ends.

  During the state shown in FIG. 13E to the state shown in FIG. 13F, the water level in the water storage tank 26 rises from the water level WL3 to the water level WL4. At this time, since the water level in the water storage tank 26 is above the water level WL3, the wash water in the water storage tank 26 flows into the overflow pipe 80 and is supplied to the toilet body 1 as makeup water.

  Furthermore, as shown in FIG. 13F, after the water supply valve device 30 has stopped the water and the water level has risen to WL4, the wash water between the water level WL3 and the water level WL4 flows into the overflow pipe 80 and serves as makeup water. , Supplied to the toilet body 1. The amount of makeup water flowing into the overflow pipe 80 is the sum of the amount of cleaning water that is replenished while the water level is rising from WL3 to WL4 and the amount of cleaning water that is between the water level WL3 and the water level WL4 that is replenished after the water level is stopped. is there.

  When the replenishment of the washing water to the toilet body 2 is completed, the water level in the water storage tank 26 becomes the position WL3, the state of FIG. 13A is returned, and the small washing is finished.

  According to the flush toilet apparatus 1 according to the embodiment of the present invention described above, the opening 72b of the partition wall 72 of the small tank 74 is opened and closed, and the amount of flush water supplied to the toilet body 2 through the jet pump unit 32 is changed. Since the switching valve 76 capable of opening and closing is provided in the small space region R2 formed by the partition wall 72 of the small tank 74 so as to be able to open and close, an internal fitting (for example, water supply) disposed outside the small space region R2 The entire water storage tank 26 can be reduced in size without interference between the valve device 30 and the like and the switching valve 76. Therefore, it can fully respond to the recent needs for downsizing the entire water storage tank. In addition, since the switching valve 76 operates in the small space region R2 inside the partition wall 72 where the state of the wash water stored is relatively more stable than the outside of the partition wall 72 of the small tank 74, the switching valve 76 can be stably operated, and large and small washing water can be stably supplied to the toilet body 2.

  Further, according to the flush toilet apparatus 1 according to the present embodiment, the opening 72b of the partition wall 72 of the small tank 74 is directed in a direction different from the direction of the position of the suction port 38c of the jet nozzle 40 and the throat pipe 38. Therefore, even when the jet nozzle 40 vigorously ejects cleaning water toward the suction port 38c of the throat pipe 38 to induce the jet pump action, the opening 72b of the partition wall 72 of the small tank 74 is used. The turbulence of the washing water passing through and the washing water in the small space region R2 formed by the partition wall 72 can be suppressed. Therefore, since the switching valve 76 can be stably operated in the small space region R2 of the partition wall 72 of the small tank 74, the large and small washing water can be stably supplied to the toilet body 2.

  Furthermore, according to the flush toilet apparatus 1 according to the present embodiment, the rear partition wall 72a and the front partition wall 72c that are long in the left-right direction of the partition wall 72 of the small tank 74, and the left partition wall 72d that is short in the front-rear direction. And the right partition wall 72e can form the small space region R2 in the small tank 72 in a flat shape that is long in the left-right direction of the water storage tank 26 in a plan view. The width can be narrowed, and the length of the entire front and rear of the flush toilet apparatus 1 can also be shortened and miniaturized. An opening 72b of the small tank 74 and a switching valve 76 are provided in the rear partition wall 72a that is long in the left-right direction of the partition wall 72, and the opening 72b is located at the position of the suction port 38c of the jet nozzle 40 and the throat pipe 38. Since the direction is different from the direction, the switching valve 76 can be made less susceptible to the influence of the jet nozzle 40 that discharges cleaning water with high momentum. Therefore, the switching valve 76 can be stably operated, and the large and small washing water can be stably supplied to the toilet body 2.

  Further, according to the flush toilet apparatus 1 according to the present embodiment, the small space region R2 in the partition wall 72 of the small tank 74 is formed in a flat shape that is long in the left-right direction of the water storage tank 26 in plan view. Even when the level of the wash water stored in the partition wall 72 is relatively low and the head pressure is relatively low, the opening 72b is a flat shape that is long in the left-right direction on the rear partition wall 72a of the partition wall 72. The switching valve 76 is formed in a flat shape that is long in the left-right direction so that the opening 72b can be closed when the switching valve is closed. Therefore, when the switching valve 76 closes the opening 72b, the water pressure of the washing water is The flat switching valve 76 that is long in the left-right direction can act stably, and the switching valve 76 can stably close the opening 72b. On the other hand, when the switching valve 76 opens the opening 72b, the washing water in the partition wall 72 of the small tank 74 can be reliably discharged from the flat opening 72b that is long in the left-right direction. In addition, the entire water storage tank 26 can be reduced in size.

  Furthermore, according to the flush toilet apparatus 1 according to the present embodiment, the partition wall 72 of the small tank 74 is formed in the water storage tank 26 outside the small space region R2 and the small space region R2. In this outer space region R1, the jet nozzle 40 and the suction port 38c of the throat pipe 38 are arranged in either one of the left and right regions with respect to the small space region R2. The whole 26 can be reduced in size. Further, by arranging the suction port 38c of the jet nozzle 40 and the throat pipe 38 in the outer space region R1 partitioned by the partition wall 72 with respect to the small space region R2 in which the switching valve 76 is provided so as to be capable of opening and closing, Even when the jet nozzle 40 vigorously injects wash water toward the suction port 38c of the throat pipe 38 to induce the jet pump action, the opening 72b of the rear partition wall 72a of the small tank 74 is formed. Disturbances in the passing wash water and the wash water in the small space region R2 can be suppressed. Therefore, since the switching valve 76 can be stably operated in the small space region R2 of the partition wall 72 of the small tank 74, large and small washing water can be stably supplied to the toilet body.

  Further, according to the flush toilet apparatus 1 according to the present embodiment, the opening 72b of the small tank 74 is disposed on the right side of the lower center portion of the rear partition wall 72a when the rear partition wall 72a is viewed from the front. Since the jet nozzle 40 and the suction port 38c of the throat pipe 38 are arranged on the side where the suction port 38c is arranged, the switching valve 76 opens the opening 72b of the small tank 74 and is small at the time of large cleaning. The water in the partition wall 72 of the tank 74 can be reliably discharged. Therefore, large washing water can be stably supplied to the toilet body 2, and the entire water storage tank 26 can be reduced in size.

  Furthermore, according to the flush toilet apparatus 1 according to the present embodiment, the support portions 76b and 76c of the switching valve 76 extend obliquely downward within the small space region R2 of the small tank 74 from the valve portion 76a, and the opening portion Since it is rotatably attached to each of the attachment portions 74c and 74d provided in the lower region in the small space region R2 inside 72b, the position of the opening 72b of the small tank 74 is set in the small space region R2. Can be positioned below. Therefore, at the time of large cleaning, the switching valve 76 can open the opening 72b and discharge the water in the partition wall 72 of the small tank 74 more reliably. Moreover, since the small space area | region R2 which the partition wall 72 of the small tank 74 forms can be made small, the whole water storage tank 26 can be reduced in size.

  Further, according to the flush toilet apparatus 1 according to the present embodiment, on the inner bottom surface 74b of the small tank 74, the support portions 76b and 76c of the switching valve 76 are rotated by the support shafts 74e and 74f of the attachment portions 74c and 74d. Recesses 74g and 74h for pivotally receiving the lower end portions of the support portions 76b and 76c are formed so as to be rotatable about the movement axis C1, and the support portions 76b and 76c of the switching valve 76 are formed. Can be set lower than the inner bottom surface 74b in the small space region R2 of the small tank 74, the position of the opening 72b of the small tank 74 can be positioned below the small space region R2. it can. Therefore, at the time of large cleaning, the switching valve 76 can open the opening 72b and discharge the water in the partition wall 72 of the small tank 74 more reliably. Moreover, since the small space area | region R2 which the partition wall 72 of the small tank 74 forms can be made small, the whole water storage tank 26 can be reduced in size.

DESCRIPTION OF SYMBOLS 1 Flush toilet apparatus 2 Toilet body 4 Wash water tank apparatus 6 Bowl part 8 Rim part 10 Shelf part 12 Trap drainage channel 12a Trap drainage channel inlet 12b Trap drainage channel riser 12c Trap drainage channel lowering tube 14 Drainage port 16 Water guide channel 18 First rim water outlet 20 Second rim water outlet 22 First water channel 24 Second water channel 26 Water storage tank 26a Inner bottom surface of water storage tank 28 Water supply line 30 Water supply valve device 32 Jet pump unit 34 Manual lever 36 Stop Water faucet 38 Throat pipe 38a Throat pipe ascending pipe section 38b Throat pipe descending pipe section 38c Throat pipe suction port 40 Jet nozzle 42 Constant flow valve 44 Vacuum break valve 46 Connection pipe 48 Main valve body 50 Main valve seat 52 Pressure Chamber 54 First hole 56 Second hole 58 First pilot valve 60 Float 62 Second pilot Valve 64 drive shaft 66 switching valve 68 floats 70 magnitude cleaning switching mechanism 72 partition wall 72a rear partition wall (the first partition wall portion)
72b Opening 72c Front partition wall 72d Left partition wall (second partition wall)
72e Right partition wall (second partition wall)
72f Upper end of partition wall 74 Small tank 74a Outer bottom surface of small tank 74b Inner bottom surface of small tank 74c Mounting portion for switching valve support portion 74d Mounting portion for switching valve support portion 74e Support shaft 74f Support shaft 74g Concavity 74h Concavity 76 Switching valve 76a Switching valve portion 76b Switching valve support portion 76c Switching valve support portion 76d Switching valve support portion mounting hole 76e Switching valve support portion mounting hole 76f Switching valve valve upper end 78 Chain 80 Overflow pipe 80a Upper end opening of overflow pipe 80b Outflow outlet of overflow pipe A Primary flow path of water supply pipe B Secondary flow path of water supply pipe C1 Rotating axis R1 Outer space area in water storage tank R2 In water storage tank Small space area

Claims (7)

A flush toilet device for supplying washing water to a toilet body by a jet pump action and washing it,
A toilet body provided with a bowl portion for receiving filth, and a water conduit for guiding washing water to the bowl portion;
A water storage tank for storing wash water to be supplied to the toilet body,
The jet pump unit is disposed in a state where at least a part thereof is submerged in the water storage tank, the jet pump unit having one end connected to the entrance of the water conduit of the toilet body and the other end being a suction port. A throat pipe that is formed so that the suction port is positioned at the lower part of the water storage tank, and a jet nozzle that injects cleaning water toward the suction port of the throat pipe to induce a jet pump action And the jet pump unit comprising:
A wall surface that extends in the vertical direction in the water storage tank and an opening formed so as to penetrate the wall surface, and less cleaning water than the cleaning water stored in the entire water storage tank is stored. A partition wall forming a small space,
A switching valve capable of opening and closing the opening of the partition wall and changing the amount of washing water supplied to the toilet body through the jet pump unit,
The switching valve is provided so as to be capable of opening and closing in a small space formed by the partition wall, and the opening of the partition wall is directed in a direction other than the jet nozzle. Urinal device. The partition wall includes a first partition wall portion that is long in the left-right direction and a second partition wall portion that is short in the front-rear direction so that the small space is formed in a flat shape that is long in the left-right direction of the water storage tank in plan view. provided, the opening and the switching valves, flush toilet apparatus according to claim 1, characterized in that provided in the first partition wall portion long in the lateral direction. The opening is formed in a flat shape that is long in the left-right direction on the first partition wall of the partition wall, and the switching valve is formed in a flat shape that is long in the left-right direction so that the opening can be closed when the valve is closed. The flush toilet apparatus according to claim 2 . The partition wall partitions the inside of the water storage tank into the small space and an outer space formed outside the small space, and in either one of the left and right regions with respect to the small space in the outer space. The flush toilet apparatus according to any one of claims 1 to 3 , wherein the jet nozzle is disposed. The opening and the switching valve is in the first partition wall portion of the partition wall, to any one of claims 2 to 4 are arranged in a state biased to the side where the jet nozzle is located The flush toilet apparatus described. The switching valve includes a valve portion that opens and closes the opening portion on the small space side, and a support portion that extends obliquely downward from the valve portion in the small space to support the valve portion, and the opening portion. A lower region in the small space inside is provided with an attachment portion to which the support portion of the switching valve is rotatably attached, and the support portion of the changeover valve has a predetermined rotation axis of the attachment portion. The flush toilet apparatus according to any one of claims 1 to 5 , wherein the valve portion is configured to open and close the opening by rotating to the center. On the bottom surface of the small space formed by the partition wall, the lower end portion of the support portion can be swung so that the support portion of the switching valve can rotate around a predetermined rotation axis of the mounting portion. The flush toilet apparatus according to claim 6, wherein a recess is formed to be received in the toilet.

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