JP2021127643A - Water closet - Google Patents

Abstract

To provide a water closet that can improve the degree of freedom in designing a tank device and secure a tank capacity.SOLUTION: The water closet 1 of the present invention comprises a tank device 4 that is provided behind a toilet bowl body 2 to supply washing water to the toilet bowl body. The tank device 4 comprises: a valve unit 14 that is provided on a downstream side of a stop valve 12 of a pipeline of a water supply pipe 6 to include on-off valves 17, 18; a water storage tank 10; and a tank water supply part 20. The tank water supply part comprises: water discharge parts 23, 23a that discharge the washing water supplied from a downstream water supply line 6b to the water storage tank; and backflow prevention parts B, 24, 26, 28 that are provided on an upstream side of the water storage tank to prevent the washing water discharged from the water discharge part into the water storage tank from flowing back to a downstream water supply pipeline. The valve unit is provided below an outer bottom surface of the water storage tank, and the backflow prevention part is provided above the water storage tank.SELECTED DRAWING: Figure 1

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with wash water and discharges filth.

Conventionally, as a flush toilet that is washed with wash water and discharges filth, for example, as is known in Patent Document 1, a valve unit is provided in a water supply channel for wash water used for rim discharge and jet discharge of a toilet. Those equipped with are known.
This valve unit is provided with a constant flow rate valve, a water supply valve (diaphragm type main valve), a water supply channel switching valve, and a check valve (vacuum breaker) from the upstream side to the downstream side. The wash water in the water supply channel is directly supplied to the rim water discharge side of the toilet bowl body by the valve unit, or the flow path is switched to the water storage tank side by the water supply channel switching valve to supply water to the water storage tank. After that, it is supplied to the jet water discharge side of the toilet bowl body side.
In addition, the check valve (vacuum breaker) usually has the entire valve unit including the check valve (vacuum breaker) from the water storage tank of the tank device in order to suppress the backflow to the upstream side due to the washing water in the water supply channel. Is also provided above.

JP-A-2018-80455

However, in the conventional flush toilet described in Patent Document 1 described above, a water supply valve for supplying and stopping water in the water supply channel and a check valve for preventing backflow of the water supply channel are provided in one valve unit. Since it is provided integrally, there is a problem that the entire valve unit becomes large due to the complicated flow path in the valve unit, the increase in the number of parts of the valve unit, and the like.
In addition, a water stopcock that stops the water supply pipe connected to a water supply source such as water is often provided in the lower part of the flush toilet, from the water stopcock to the valve unit above the water storage tank. Since the water supply channel on the primary side is also long, it is necessary to devise the arrangement and arrangement of the water supply hose forming the water supply channel on the primary side.
However, since the water supply hose forming the water supply channel on the primary side requires strength that can withstand a relatively high primary water supply pressure, the degree of freedom in design such as the arrangement and handling of the water supply hose is also restricted.
Therefore, in order to prevent the water supply hose from interfering with the water storage tank, it may be necessary to take measures such as reducing the tank capacity of the water storage tank.
On the other hand, in recent years, in order to improve and diversify the design of the flush toilet, the so-called "low silhouette", which is to design the upper end height of the entire flush toilet as low as possible, has become an issue. One of the important issues is whether to secure an appropriate tank capacity of the tank device that enables cleaning of the toilet bowl while realizing a low silhouette of the toilet bowl.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and provides a flush toilet that can improve the degree of freedom in designing the tank device and secure the tank capacity. The purpose is to provide.

In order to solve the above-mentioned problems, the present invention is a water-washing stool that is washed with washing water and discharges filth, and has a bowl portion that receives filth and a rim portion formed on the upper edge of the bowl portion. The tank device includes a toilet body provided with a drain trap portion for discharging filth in the bowl portion, and a tank device provided behind the toilet body and supplying wash water to the toilet body. Is a valve unit including a water supply channel through which wash water supplied from the water supply source passes, an on-off valve provided on the downstream side of the stopcock of the water supply channel to open and close the water supply channel, and the toilet body. It is provided with a water storage tank main body provided at the rear and above the floor surface to store the wash water supplied from the water supply channel, and a tank water supply unit for supplying the wash water in the water supply channel to the water storage tank main body. The water supply channel includes an upstream water supply line extending from the water stopcock to the inlet of the valve unit, and a downstream water supply line extending from the outlet of the valve unit to the tank water supply. The tank water supply unit includes a water discharge unit that discharges wash water supplied from the downstream water supply pipeline to the water storage tank body, and a water discharge unit that is provided on the upstream side of the water storage tank body and stores water from the water discharge unit. The valve unit is provided with a backflow prevention unit for preventing the flush water discharged into the tank body from flowing back to the downstream water supply pipeline, and the valve unit is at or below the outer bottom surface of the water storage tank body. The backflow prevention unit is provided above the main body of the water storage tank.
In the present invention configured as described above, a single water supply pipe is provided for the water supply path from the water stopcock to the tank water supply section, which is required to have strength capable of withstanding a relatively high water supply pressure on the primary side (upstream side). If it is a road, the length of the pipe will be long, and there will be many design restrictions such as the arrangement and handling of the water supply pipe.
On the other hand, according to the present invention, regarding the water supply passage from the water stopcock to the tank water supply part, the upstream side water supply pipe extending from the water stopcock to the inlet part of the valve unit and the tank water supply part from the outlet part of the valve unit. Since it was possible to divide the water supply pipe into two water supply pipes, which extend to the downstream side, it is possible to improve the degree of freedom in designing the arrangement and handling of each water supply pipe.
As a result, the degree of freedom in designing the tank device can be improved, and the tank capacity of the water storage tank body can be secured.
Further, while the valve unit is provided on the outer bottom surface of the water storage tank body or below it, the backflow prevention part is provided above the water storage tank body, so that the valve unit and the backflow prevention part are separated from each other. It can be installed on the body.
Therefore, the internal flow path of the valve unit can be simplified and the entire valve unit can be miniaturized.
Further, by providing the valve unit and the backflow prevention unit separately from each other, it is possible to improve the degree of freedom in design such as the arrangement of the water supply path from the valve unit to the tank water supply unit.
Furthermore, since the valve unit is provided on the outer bottom surface of the water storage tank body or below it, the valve unit can be provided by effectively utilizing the limited space behind the toilet bowl body and below the water storage tank body. At the same time, it is possible to secure a larger tank capacity of the water storage tank body.
Further, as compared with the case where the valve unit is provided above the water storage tank body, it is possible to realize a low silhouette and miniaturization of the entire tank device and the entire flush toilet bowl.
Further, since the backflow prevention unit is provided above the water storage tank body, it is possible to prevent the washing water in the water storage tank body from flowing back to the downstream water supply pipeline.

In the present invention, preferably, the valve unit is provided on the water stop valve side below the outer bottom surface of the water storage tank body, and the downstream water supply pipe is formed of a flexible hose member. The upstream water supply line is formed of a pipe member having a higher rigidity than the flexible hose member, and the length of the downstream water supply line is larger than the length of the upstream water supply line. Is also set long.
In the present invention configured as described above, the valve unit can be provided on the water stop valve side below the outer bottom surface of the water storage tank body. Furthermore, in addition to being able to form the upstream water supply pipeline extending from the stopcock to the inlet of the valve unit with a pipe member that is more rigid than the flexible hose member, from the outlet of the valve unit. The downstream water supply line extending to the tank water supply section could be formed of a flexible hose member.
Therefore, for the upstream water supply line that extends from the stopcock to the inlet of the valve unit, the pipe has a higher rigidity than the flexible hose member so that it can withstand the relatively high primary (upstream) water supply pressure. By adopting a member and setting it shorter than the length of the downstream water supply pipe, the strength of the upstream water supply pipe can be ensured.
On the other hand, in the downstream water supply pipe extending from the outlet of the valve unit to the tank water supply, a flexible hose member is adopted and the length is set longer than the length of the upstream water supply pipe. It is possible to improve the degree of freedom in design, such as the arrangement and handling of roads.
As a result, the tank capacity of the water storage tank body and the surrounding space can be secured, so that the degree of freedom in designing the entire tank device and the entire flush toilet can be improved.

In the present invention, preferably, the connection portion between the outlet portion of the downstream water supply pipeline and the tank water supply portion is located above the water storage tank main body, and the outlet portion of the valve unit is the water storage tank main body. It is provided so as to be close to the outer bottom surface of the.
In the present invention configured as described above, since the connection portion between the outlet portion of the downstream water supply pipeline and the tank water supply portion is located above the water storage tank main body, the outlet portion of the valve unit is the water storage tank main body. By providing the water supply line so as to be close to the outer bottom surface of the water supply line, it is possible to prevent the length of the downstream water supply line from becoming unnecessarily long.
Therefore, it is possible to suppress unnecessary occupancy of the downstream water supply line with respect to the accommodating area of the water storage tank behind the toilet bowl body.
Therefore, the area behind the toilet bowl body can be widely utilized, and the degree of freedom in designing the tank device can be improved.
Further, since the vertical length of the downstream water supply pipeline from the outlet portion of the valve unit to the tank water supply portion can be suppressed, the vertical size of the entire tank device can be reduced and the size of the entire tank device can be reduced. The size of the entire flush stool in the vertical direction can also be reduced.

In the present invention, preferably, the valve unit is provided so that its outlet portion is located on the front side of the water storage tank main body.
In the present invention configured as described above, since the outlet portion of the flow path of the valve unit is located on the front side of the water storage tank body, the distance between the valve unit and the toilet body in the front-rear direction can be shortened. can.
As a result, when the downstream water supply pipe from the outlet of the bubble unit to the tank water supply is detoured from the front of the water storage tank body, the distance in the front-rear direction of the downstream water supply can be shortened.
Therefore, it is possible to prevent the path length of the downstream water supply pipe from becoming unnecessarily long, so that the area behind the toilet bowl body can be widely utilized and the degree of freedom in designing the tank device is further increased. Can be improved.

In the present invention, preferably, the valve unit has a connection portion with the downstream water supply pipe directed to the front side.
In the present invention configured as described above, when the connection portion of the valve unit with the downstream water supply pipe is directed to the front side, the downstream water supply pipe is bypassed from the front of the water storage tank body. In addition, the distance in the front-rear direction of the downstream water supply pipe from the connection portion between the bubble unit and the downstream water supply pipe to the tank water supply portion can also be shortened.
Therefore, it is possible to prevent the path length of the downstream water supply pipe from becoming unnecessarily long, so that the area behind the toilet bowl body can be widely utilized and the degree of freedom in designing the tank device is further increased. Can be improved.

In the present invention, preferably, the backflow prevention unit is provided in a small tank that is provided above the water storage tank body so as to be communicable and allows the washing water discharged from the water discharge unit to flow out into the water storage tank body, and the small tank. An overflow pipe that is connected to the tank and causes the washing water that overflows from the inside of the water storage tank body into the small tank to flow out to the toilet body side, and a reverse that prevents backflow of the washing water from this overflow pipe into the small tank. It is equipped with a valve stop.
In the present invention configured as described above, even if the washing water in the water storage tank body rises to the inside of the small tank, the washing water in the small tank can flow out from the overflow pipe to the toilet bowl body side. Therefore, it is possible to prevent the washing water in the small tank from flowing back to the downstream water supply pipeline.
Further, the check valve can prevent the washing water flowing out from the small tank into the overflow pipe from flowing back.

In the present invention, preferably, the valve unit includes a manual operation unit that allows the opening and closing of the on-off valve to be manually operated in the event of a power failure, and the manual operation unit is inserted to the side of the toilet bowl body. It is provided so that it can be turned.
In the present invention configured as described above, since the manual operation unit that enables the opening and closing of the on-off valve of the valve unit to be manually operated in the event of a power failure is provided so as to be directed to the side side of the toilet bowl body. In an emergency such as a power outage, the user can easily see the manual operation unit and access it easily.
Therefore, the visibility and operability of the manual operation unit can be improved.
In addition, since the manual operation unit is directed to the side of the toilet bowl body, the downstream water supply pipe line from the outlet of the bubble unit to the tank water supply unit can be bypassed from the front of the water storage tank body. The manual operation unit does not interfere with the downstream water supply line and does not affect the distance in the front-rear direction of the downstream water supply line.
Therefore, it is possible to prevent the path length of the downstream water supply pipe from becoming unnecessarily long, so that the area behind the toilet bowl body can be widely utilized.
In addition, the degree of freedom in designing a tank device capable of manually supplying and stopping water to the on-off valve of the valve unit in the event of a power failure can be further improved.

In the present invention, preferably, the drain trap portion extends in the front-rear direction from the inlet portion connected to the bowl portion toward the outlet portion behind the bowl portion in a plan view, and the water storage tank main body. Are arranged so as to surround the upper part of the drain trap portion from the left and right sides and the rear side.
In the present invention configured in this way, since the water storage tank main body is arranged so as to surround the upper part of the drain trap portion from the left and right sides and the rear side, the limited space behind the toilet bowl main body is effectively utilized. Then, the water storage tank body can be arranged.
Therefore, it is possible to realize a low silhouette and miniaturization of the entire tank device and the entire flush toilet while securing a larger tank capacity of the water storage tank body.

In the present invention, preferably, the water storage tank main body has a large volume when the water storage tank body is divided into two at the center of the left and right, and a small volume when the water storage tank is divided into two at the center of the left and right. It has a left-right asymmetrical shape with a small tank body on the side.
The backflow prevention portion is provided above the large tank main body portion, and the valve unit is provided on the bottom surface of the small tank portion.
In the present invention configured in this way, in addition to being able to form the water storage tank body into a left-right asymmetrical shape by the large tank body and the small tank body, the backflow prevention part is the water storage tank body. It could be installed above the main body of the large tank. In addition, the valve unit could be provided on the bottom surface of the small tank portion of the water storage tank body.
As a result, it is possible to effectively utilize the limited space behind the toilet bowl body and secure a larger tank capacity of the water storage tank body.
In addition, it is possible to realize a low silhouette and miniaturization for the entire tank device and the entire flush toilet.

In the present invention, preferably, the large tank main body extends forward from the rear large tank main body arranged on the rear side of the drain trap and the rear large tank main body, and is left and right of the drain trap. A large tank main body on the front side arranged on one side and a large tank main body on the lower side extending downward from the large tank on the rear side are provided, and the small tank main body is behind the drain trap part. It is provided with a rear side small tank main body portion arranged on the side and a front side small tank main body portion extending forward from the rear side small tank main body portion and arranged on the left and right other sides of the drain trap. The front end of the front large tank main body is arranged in front of the front end of the front small tank main body, and the bottom surfaces of the rear small tank main body and the front small tank main body are described above. It is located above the bottom surface of the lower large tank body, the backflow prevention unit is provided above the front large tank body, and the valve unit is the front small tank body. It is provided on the bottom of the.
In the present invention configured as described above, regarding the water storage tank main body, the rear side large tank main body portion of the large tank main body portion, the front side large tank main body portion, the lower side large tank main body portion, and the rear side of the small tank main body portion. The shape can be asymmetrical depending on the side small tank main body and the front small tank main body.
Further, since the backflow prevention unit is provided above the large tank body on the front side of the water storage tank body and the valve unit is provided on the bottom surface of the small tank body on the front side of the water storage tank body, the backflow prevention part is provided. And the space occupied by each of the valve units can be suppressed.
Therefore, the valve unit can be provided by effectively utilizing the limited space behind the toilet bowl body and below the water storage tank body, and the tank capacity of the water storage tank body can be secured larger.
In addition, it is possible to realize a low silhouette and miniaturization for the entire tank device and the entire flush toilet.

According to the flush toilet bowl of the present invention, the degree of freedom in designing the tank device can be improved, and the tank capacity can be secured.

It is an overall block diagram of the flush toilet by one Embodiment of this invention. It is a side view of the flush toilet bowl by one Embodiment of this invention. It is a partially enlarged plan view which enlarged a part of the tank device of the flush toilet and the body of the toilet by one Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. It is a perspective view of the water storage tank of the flush toilet according to one embodiment of the present invention seen obliquely from the rear and from above. It is a rear view of the water storage tank of the flush toilet according to one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line VII-VII of the valve unit of the flush toilet according to the embodiment of the present invention shown in FIG. ) Is shown. It is a cross-sectional view similar to FIG. 7 in the valve unit of the flush toilet according to the embodiment of the present invention, and shows a state in which the solenoid valve is opened and the main valve body is opened (water flow state) in a normal state. show. It is a cross-sectional view similar to FIGS. 7 and 8 in the valve unit of the flush toilet according to the embodiment of the present invention, and shows a state (water flow state) in which the main valve body is manually opened in the event of a power failure.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is an overall configuration diagram of a flush toilet according to an embodiment of the present invention. Further, FIG. 2 is a side view of the flush toilet according to the embodiment of the present invention.
As shown in FIGS. 1 and 2, the flush toilet bowl 1 according to the embodiment of the present invention includes a pottery bowl main body 2 and a tank device 4 provided on the rear side thereof.
Further, the toilet bowl main body 2 includes a bowl portion 2a that receives filth, a drain trap portion (drain trap pipe 2b) that extends from the bottom of the bowl portion 2a and discharges filth in the bowl portion 2a, and an upper edge of the bowl portion 2a. It is provided with a rim portion 2c formed in.

Next, FIG. 3 is a partially enlarged plan view of a part of the tank device and the main body of the flush toilet according to the embodiment of the present invention. Further, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
As shown in FIGS. 1 to 4, the tank device 4 includes a water supply pipe 6 (water supply channel) and a water discharge pipe 8 connected to the upstream side and the downstream side, respectively.
The upstream side of the water supply pipe 6 is connected to an external water supply source (not shown) such as a water supply.
On the other hand, the downstream side of the water supply pipe 6 is connected to the water storage tank 10 (details will be described later) of the tank device 4. As a result, wash water is supplied from the water supply pipe 6 to the water storage tank 10.
Further, the water supply pipe 6 is provided with a water stop valve 12 and a valve unit 14, respectively, from the upstream side to the downstream side.
Further, the valve unit 14 is an electromagnetic valve 18 that opens and closes a constant flow rate valve 16 provided in the water supply pipe 6 and an on-off valve (diaphragm type main valve body 17) provided on the downstream side of the constant flow rate valve 16. Includes each.
The details of the structure of the valve unit 14 and the like will be described later.

Next, as shown in FIGS. 1 to 4, the tank device 4 is further connected to a connecting unit 20 connected to the downstream side of the valve unit 14 of the water supply pipe 6 and to the downstream side of the connecting unit 20. It is provided with a tank unit 22 including a water storage tank 10.
Further, as shown in FIG. 1, the water supply pipe 6 has an upstream water supply pipe line 6a extending from the water stop valve 12 to the inlet portion 14a of the valve unit 14 and a downstream side extending from the outlet portion 14b of the valve unit 14 to the connecting unit 20. It is provided with a side water supply line 6b.
Further, in the valve unit 14, the flow rate of the washing water in the water supply pipe 6 inside the valve unit 14 is constantly adjusted by the constant flow valve 16.
After that, when the solenoid valve 18 is electromagnetically opened and the flow path of the water supply pipe 6 is opened by the on-off valve (diaphragm type main valve body 17), the washing water in the water supply pipe 6 passes through the connecting unit 20. It is designed to be supplied to the tank unit 22.

That is, as shown in FIGS. 1 to 4, the connecting unit 20 is provided on the upstream side of the tank unit 22 and supplies the washing water supplied from the water supply pipe 6 into the water storage tank 10 of the tank unit 22. It is a department.
As shown in FIGS. 1 to 4, specifically, the connecting unit 20 includes a water supply nozzle 23 (water discharge portion), a water receiving housing 24 (small tank), an overflow pipe 26, and a check valve 28, respectively. ing.
First, the water receiving housing 24 of the connecting unit 20 has its lower opening 24a detachably connected to the upper opening 10a of the water storage tank 10 of the tank unit 22.

Next, as shown in FIGS. 1 to 4, the water supply nozzle 23 of the connecting unit 20 is fixed to the side wall 24b of the water receiving housing 24, and its upstream end extends downstream from the outlet portion 14b of the valve unit 14. It is connected to the side water supply line 6b.
On the other hand, the downstream side of the water supply nozzle 23 extends from the side wall 24b of the water receiving housing 24 to the inside, and the downstream end (tip portion) of the water supply nozzle 23 is directed downward to form the water supply port 23a (). ..
That is, as shown in FIGS. 1, 2 and 4, the water supply port 23a of the water supply nozzle 23 discharges the washing water supplied from the water supply pipe line 6b on the downstream side of the water supply pipe 6 into the water receiving housing 24. It is a department.
Further, the washing water W1 discharged into the water receiving housing 24 from the water supply port 23a of the water supply nozzle 23 is supplied into the water storage tank 10 from the lower opening 24a of the water receiving housing 24 and the upper opening 10a of the water storage tank 10. It has become so.

Next, as shown in FIGS. 1 and 4, the overflow pipe 26 of the connecting unit 20 connects the overflow port 24c provided on a part of the side wall 24b of the water receiving housing 24 and the water discharge pipe 8.
The upstream side of the water discharge pipe 8 is a connecting pipe connected to the pump 30 of the tank device 4, and the downstream side thereof is connected to the rim headrace 2d inside the rim portion 2c of the toilet bowl body 2.

Next, as shown in FIGS. 1 and 4, the check valve 28 of the connecting unit 20 is provided at the overflow port 24c, and the washing water in the water receiving housing 24 flows into the overflow pipe 26 from the overflow port 24c. On the other hand, it is possible to prevent the washing water in the overflow pipe 26 from flowing back into the water receiving housing 24.
The water receiving housing 24, the overflow pipe 26, and the check valve 28 of the connecting unit 20 are each provided on the upstream side of the water storage tank 10 and above the water storage tank 10, and are provided with a water discharge unit (water supply nozzle 23). To function as a backflow prevention unit B (see FIG. 1) that prevents the wash water discharged from the water supply port 23a) into the water storage tank 10 via the water receiving housing 24 from flowing back to the downstream water supply pipe line 6b. It is also.

Next, as shown in FIGS. 1 and 4, the tank unit 22 includes a water storage tank 10, a pump 30, a float switch 32, a drain plug 34, a controller C, and the like, respectively.
The pump 30 is provided in a part (middle) of the water pipe 36 connected to the upstream side of the water discharge pipe 8. The upstream end 36a of the water pipe 36 is connected to the downstream end 38a of the suction pipe 38 provided in the water storage tank 10.

Further, as shown in FIGS. 1 and 4, the washing water stored in the water storage tank 10 is sucked from the suction pipe 38 into the water pipe 36 by the operation of the pump 30, and then the pump 30 is operated. After that, it is pumped to the water discharge pipe 8.
As a result, all of the wash water supplied from the water storage tank 10 to the water discharge pipe 8 by the pump 30 is supplied into the rim headrace 2d from the inlet 2e of the rim headrace 2d.
Then, the wash water in the rim headrace 2d is discharged into the bowl portion 2a from the rim spout 2f at the downstream end of the rim headrace 2d, so that the toilet bowl is washed (so-called toilet bowl wash with 100% rim spout). It has become.
That is, each of the water flow pipe 36 and the water discharge pipe 8 functions as a wash water supply pipe that supplies the wash water pumped from the water storage tank 10 by the pump 30 to the toilet bowl main body 2.

The float switch 32 detects the water level in the water storage tank 10. The opening / closing operation of the solenoid valve 18 of the valve unit 14 is controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32.
Further, the operation of the pump 30 is also controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32.
For example, when the water level in the water storage tank 10 detected by the float switch 32 is equal to or lower than a predetermined value, the solenoid valve 18 is opened, the water supply pipe 6 is opened, and the pump 30 is operated.
When the water level in the water storage tank 10 reaches a predetermined water level, the solenoid valve 18 is closed, the water supply pipe 6 is closed, and the pump 30 is stopped.
Further, under the control of the controller C, the pump 30 can be driven during the water supply from the water supply pipe 6 to the water storage tank 10, and the wash water can be pumped from the water storage tank 10 to the toilet body 2, and the water storage tank 6 can be used to pump the wash water. Water can be supplied to 10 and wash water can be supplied from the pump 30 to the toilet body 2 at the same time.

The drain plug 34 is provided on the bottom surface of the water storage tank 10. The drain plug 34 is always closed during normal use and is opened as needed so that the washing water in the water storage tank 10 can be discharged to the outside.

Next, the details of the water storage tank 10 of the tank unit 22 will be described with reference to FIGS. 3 to 6.
FIG. 5 is a perspective view of the water storage tank of the flush toilet according to the embodiment of the present invention as viewed diagonally from the rear and from above. Further, FIG. 6 is a rear view of the water storage tank of the flush toilet according to the embodiment of the present invention.
First, as shown in FIG. 4, the water storage tank 10 of the tank unit 22 includes a single tank main body 40 and a dew-proof material 42 that covers the outside of the tank main body 40.
Next, as shown in FIGS. 3 to 6, assuming that the virtual vertical plane that divides the water storage tank 10 of the tank unit 22 into two at the center on the left and right is "lead plane A1", the single tank body 40 of the water storage tank 10 And the dew-proof material 42 on the outside thereof are provided with a large tank portion 44 and a small tank portion 46 on the left and right sides with respect to the vertical plane A1. As a result, the water storage tank 10 is divided into a large tank portion 44 and a small tank portion 46 on the left and right by the vertical plane A1.

Further, as shown in FIG. 6, the large tank portion 44 is arranged on the left side of the vertical facing A1 when the tank body 40 and the dew-proof material 42 are viewed from the back side, and the small tank portion 46 is the tank body 40 and the dew-proof material 42. The material 42 is arranged on the right side of the vertical plane A1 when viewed from the back side, and the volume V1 of the large tank portion 44 is set to be larger than the volume V2 of the small tank portion 46 (V1> V2).
As a result, the water storage tank 10 has a left-right asymmetrical shape (a substantially C-shaped or U-shaped variant in the plan view of FIG. 3) due to the large tank portion 44 and the small tank portion 46.

Next, as shown in FIGS. 1 to 4, the drain trap pipe 2b of the toilet bowl body 2 is moved back and forth from the inlet portion 2g connected below the bowl portion 2a toward the outlet portion 2h behind the bowl portion 2a. It extends in the direction.
Then, as shown in FIGS. 3 to 6, the large tank portion 44 of the water storage tank 10 is a rear large tank portion 44a arranged on the rear side of the drain trap pipe 2b and a front from the rear large tank portion 44a. The front large tank portion 44b, which extends to the left and right sides of the drain trap pipe 2b (on the right side when viewed from the front side of the toilet bowl body 2), and the lower large tank portion extending downward from the rear large tank portion 44a. It is equipped with 44c.

Next, as shown in FIGS. 3 to 6, the small tank portion 46 of the water storage tank 10 is from the rear side small tank portion 46a arranged on the rear side of the drain trap pipe 2b and the rear side small tank portion 46a. It is provided with a front side small tank portion 46b extending forward and arranged on the left and right other sides of the drain trap pipe 2b (left side when viewed from the front side of the toilet bowl main body 2).
That is, as shown in FIGS. 1, 3 and 4, the water storage tank 10 is arranged so as to surround the upper part of the drain trap pipe 2b from both the left and right sides and the rear side.

Next, as shown in FIG. 4, the toilet bowl main body 2 accommodates each of the large tank portion 44 and the small tank portion 46 at a position above the floor surface F1 in the region rearward from the bowl portion 2a. A tank accommodating portion S1 and a small tank accommodating portion S2 are provided, respectively.
That is, the large tank accommodating portion S1 is located on one of the left and right sides (vertical when the toilet bowl body 2 is viewed from the front side) with respect to the vertical plane A1 divided into two at the center of the left and right in the region rearward of the bowl portion 2a of the toilet bowl body 2. It is formed on the right side of the surface A1).
On the other hand, the small tank accommodating portion S2 is located on the left and right sides of the toilet bowl body 2 on the left and right sides with respect to the vertical plane A1 (on the left side of the vertical plane A1 when the toilet bowl body 2 is viewed from the front side) in the region rearward from the bowl portion 2a of the toilet bowl body 2. It is formed.

Further, as shown in FIGS. 4 to 6, when the large tank portion 44 and the small tank portion 46 are installed in the large tank accommodating portion S1 and the small tank accommodating portion S2, respectively, the bottom surface of the large tank portion 44 is provided. The lowest position (the lowest position P1 of the bottom surface 44d of the lower large tank portion 44c) is the lowest position of the bottom surface of the small tank portion 46 (the lowest position P2 of the bottom surface 46c of the rear side small tank portion 46a and the front side small tank portion 46b). ) Is located below.
Further, as shown in FIGS. 4 to 6, when the large tank portion 44 and the small tank portion 46 are installed in the large tank accommodating portion S1 and the small tank accommodating portion S2, respectively, the upper surface of the large tank portion 44 is formed. (The highest position P3 of the upper surface 44e of the front side large tank portion 44b) is located above the highest position P4 of the rear side small tank portion 46a of the small tank portion 46 and the upper surface 46d of the front side small tank portion 46b. However, it is located below the upper surface 2i of the rim portion 2c of the toilet bowl body 2.
Further, as shown in FIGS. 3 to 6, the position P5 of the front end 44f of the front large tank portion 44b is located ahead of the position P6 of the front end 46e of the front small tank portion 46b.

Incidentally, as shown in FIG. 4, the suction pipe 38 is provided over both the rear side large tank portion 44a and the lower side large tank portion 44c of the large tank portion 44 of the tank body 40. The upstream end 36a of the water pipe 36 extending from the pump 30 to the upstream side (side) is watertightly connected to the downstream end 38a of the suction pipe 38 which is a part of the large tank portion 44.
Further, as shown in FIG. 3, the upstream end of the water discharge pipe 8 is connected to the downstream end of the water pipe 36 extending downstream (upward) from the pump 30, and the downstream end (outlet portion 8a) of the water discharge pipe 8 is connected. ) Is connected to the inlet 2e of the rim headrace 2d on the left and right opposite sides of the toilet body 2 with respect to the vertical surface A1 (left side of the vertical surface A1 when the toilet body 2 is viewed from the front side).

Next, as shown in FIG. 4, in the large tank portion 44, the side wall surface 44 g on the vertical surface A1 side (left and right center side) is outside the drain trap pipe 2b (drain trap pipe 2b) in the large tank accommodating portion S1. It is located on the right side when viewed from the front side).
Similarly, in the small tank portion 46, the side wall surface 46f on the vertical surface A1 side (left and right center side) is outside the drain trap pipe 2b in the small tank accommodating portion S2 (the drain trap pipe 2b is on the left side when viewed from the front side). Is located in.
Further, as shown in FIGS. 4 and 5, the drain trap pipe 2b is provided at the center of the left and right sides of the toilet bowl main body 2, and the upstream end 36a of the water pipe 36 is the drainage of the left and right side surfaces of the large tank portion 44. It is connected to the side wall surface 44g on the trap tube 2b side.

Further, as shown in FIGS. 3 and 4, the pump 30 is arranged behind the bowl portion 2a of the toilet bowl body 2 and above the drain trap pipe 2b.
Further, the pump 30 is arranged on the front side of the rear side large tank portion 44a and the rear side small tank portion 46a, and is located in the left-right direction between the front side large tank portion 44b and the front side small tank portion 46b. It is placed in the space of.
As a result, the pump 30 is provided on the left and right center sides of the toilet body 2 with respect to the upstream end 36a of the water pipe 36 and the downstream end (outlet portion 8a) of the water discharge pipe 8.

Next, with reference to FIGS. 1, 2, 4, and 7 to 9, details such as the structure of the valve unit 14 of the flush toilet according to the embodiment of the present invention will be described.
FIG. 7 is a cross-sectional view taken along the line VII-VII of the valve unit of the flush toilet according to the embodiment of the present invention shown in FIG.
First, as shown in FIGS. 1, 2, 4, and 7, the main body 48 of the valve unit 14 is the outer bottom surface of the water storage tank 10 of the tank device 4 (more specifically, the rear side of the water storage tank 10). It is fixed to a mounting member 49 (see FIG. 4) located below the small tank portion 46a and the bottom surface 46c of the front small tank portion 46b) and fixed to the rear region R1 of the toilet bowl body 2.
Further, the main body 48 of the valve unit 14 is provided on the water stop valve 12 side below the bottom surface 46c of the rear side small tank portion 46a and the front side small tank portion 46b of the water storage tank 10.

Next, as shown in FIGS. 2 and 7, the main body 48 of the valve unit 14 is formed with a primary side water supply channel 48a and a secondary side water supply channel 48b, respectively. These water supply channels 48a and 48b extend in the front-rear direction from the upstream side to the downstream side.
Further, as shown in FIGS. 2 and 7, the outlet portion 14b of the valve unit 14 corresponds to the downstream end of the water supply channel 48b on the secondary side of the main body portion 48.
Further, as shown in FIGS. 2 and 7, the outlet portion 14b (connection portion C1) of the valve unit 14 also has a bottom surface 46c of the rear side small tank portion 46a and the front side small tank portion 46b of the water storage tank 10. It is directed to the front side in close proximity.
Here, as shown in FIG. 2, the front end of the outlet portion 14b (connection portion C1) of the valve unit 14 is located on the front side of the front end 46e of the front side small tank portion 46b of the water storage tank 10.

As shown in FIGS. 1 to 4 and 7, the downstream water supply pipe line 6b connected to the outlet portion 14b (connection portion C1) of the valve unit 14 is formed of a flexible hose member H. There is.
That is, the upstream end of the hose member H is connected to the outlet 14b (connection C1) of the valve unit 14, and the downstream end of the hose member H (outlet of the downstream water supply line 6b) is , It is connected to the inlet portion (connection portion C2) of the water supply nozzle 23.
Further, the connection portion C2 between the outlet portion of the downstream water supply pipe line 6b and the inlet portion of the water supply nozzle 23 of the connecting unit 20 is located above the water storage tank 10, while FIGS. As shown in FIG. 4, the upstream water supply pipe line 6a connected to the inlet portion 14a of the valve unit 14 is formed of a pipe member T (see FIG. 4) having a rigidity higher than that of the flexible hose member H.
Further, the length L1 of the downstream water supply pipe line 6b and the hose member H from the outlet portion 14b of the valve unit 14 to the connection portion C1 of the water supply nozzle 23 is upstream from the water stop valve 12 to the inlet portion 14a of the valve unit 14. The length of the side water supply pipe line 6a and the pipe member T is set to be longer than the length L2 (L1> L2).

Next, as shown in FIGS. 1, 2, 4, and 7, the valve unit 14 includes the above-mentioned constant flow valve 16, diaphragm type main valve body 17, and solenoid valve 18 provided in the main body 48 thereof. In addition to the above, a manual water supply operation device 50 at the time of a power failure and a manual drainage operation device 52 at the time of a power failure are provided.
These devices 50 and 52 function as a manual operation unit (power outage operation unit) for power failure countermeasures that enables cleaning of the toilet bowl in the event of a power failure.
Specifically, as shown in FIGS. 1, 2 and 7, the manual water supply operation device 50 at the time of a power failure of the valve unit 14 sets the side of the main body 48 of the valve unit 14 (toilet bowl main body 2 and tank device 4). A rotatably provided handle portion 54 is provided on the left side when viewed from the front side).
Further, as shown in FIGS. 1, 2 and 7, the manual water supply operation device 50 at the time of a power failure includes an operation shaft portion (spindle 56) whose outer end is fixed to the handle portion 54. When the handle portion 54 is rotated around its rotation center axis (operation axis O1), the spindle 56 can move (slide) in the axial direction of the operation axis O1.

Next, as shown in FIG. 7, in the normal state, the diaphragm type main valve body 17 operates the electromagnetic valve 18 to supply water to the primary side water supply passage 48a and the secondary side water supply in the main body 48 of the valve unit 14. The communication port (water supply port 48c) that communicates with the road 48b is opened and closed.
Further, the solenoid valve side pilot valve body 18a of the solenoid valve 18 opens and closes the solenoid valve side pilot hole 58 of the main body 48 of the valve unit 14 communicating with the secondary water supply channel 48b.
Further, as shown in FIG. 4, when the solenoid valve side pilot valve body 18a closes (closes) the solenoid valve side pilot hole 58, the main valve side pressure chamber accommodating the diaphragm type main valve body 17 is accommodated. The downstream side of the 60 pilot holes (main valve side pilot hole 62) is closed by the tip portion 56a of the spindle 56.

Next, the main body 48 of the valve unit 14 is provided with a pressure relief passage 64 for communicating the solenoid valve side pilot valve chamber 18b containing the solenoid valve side pilot valve body 18a and the main valve side pressure chamber 60. ing.
Here, in a state where the solenoid valve side pilot valve body 18a closes (closes) the solenoid valve side pilot hole 58, the air in the main valve side pressure chamber 60 cannot escape to the pressure release passage 64. There is.
As a result, the diaphragm type main valve body 17 is pressed toward the valve seat 66 by the pressure in the main valve side pressure chamber 60, so that the water supply port 48c is closed by the main valve body 17 (water stop state). It has become.
Further, the main body 48 of the valve unit 14 is provided with a communication passage 68 extending from the vicinity of the spindle 56 to the water supply passage 48b on the secondary side. The communication passage 68 also communicates with the solenoid valve side pilot hole 58.
Here, an O-ring 70 is provided on the outer peripheral surface in the vicinity of the tip portion 56a of the spindle 56. As a result, in the normally closed state of the main valve body 17, the main valve side pressure chamber 60 and the communication passage 68 are sealed by the O-ring 70 of the spindle 56 so as not to communicate with each other.

Next, FIG. 8 is a cross-sectional view similar to FIG. 7 in the valve unit 14 of the flush toilet bowl 1 according to the embodiment of the present invention, in which the solenoid valve 18 is normally opened to open the main valve body 17. Indicates the valve opening operation state (water flow state).
As shown in FIG. 8, when the solenoid valve 18 is operated by the command signal (valve opening operation signal) transmitted from the controller C and the solenoid valve side pilot valve body 18a opens the solenoid valve side pilot hole 58, the pressure is released. The passage 64 communicates with the solenoid valve side pilot hole 58.
Then, after the air in the main valve side pressure chamber 60 has passed through the pressure release passage 64, it can flow out from the solenoid valve side pilot hole 58 to the communication passage 68.
As a result, when the pressure in the pressure chamber 60 on the main valve side becomes lower than the water supply pressure in the water supply channel 48a on the primary side, the main valve body 17 moves in the direction of opening the valve, and the water supply port 48c is opened. ing.
As a result, the wash water of the primary side water supply channel 48a that has passed through the constant flow valve 16 flows into the secondary side water supply channel 48b from the water supply port 48c.

Then, as shown in FIG. 7, when the solenoid valve side pilot valve body 18a of the solenoid valve 18 closes the solenoid valve side pilot hole 58 again by the command signal (valve closing operation signal) transmitted from the controller C, the main valve is main. While the air in the valve side pressure chamber 60 cannot be depressurized into the pressure release passage 64, the wash water of the primary side water supply channel 48a around the valve seat 66 passes through the bleed hole 72 of the main valve body 17. It is designed to flow into the pressure chamber 60 on the main valve side.
As a result, the pressure in the main valve side pressure chamber 60 is increased, and the diaphragm type main valve body 17 is pressed toward the valve seat 66 by the pressure in the main valve side pressure chamber 60, so that the water supply port 48c is the main. It is in a state of being closed by the valve body 17 (water stop state).

Next, FIG. 9 is a cross-sectional view similar to FIGS. 7 and 8 in the valve unit 14 of the flush toilet 1 according to the embodiment of the present invention, in which the main valve body 17 is manually supplied with water during a power failure. 50 indicates a state in which the valve is manually opened (water flow state).
As shown in FIG. 9, the handle portion 54 of the manual water supply operation device 50 at the time of a power failure is screwed into a part of the main body portion 48 of the valve unit 14, and the fastener 74 is attached to one end of the spindle 56. It is fixed.
Since the solenoid valve 18 does not operate in the event of a power failure, the spindle 56 is moved to the outside of the operation axis O1 in the axial direction by rotating the handle portion 54 of the manual water supply operation device 50 in the event of a power failure in one direction around the operation axis O1. It moves to the distal side with respect to the main valve side pilot hole 62).
Then, when the spindle 56 and the O-ring 70 move until the main valve side pressure chamber 60 and the communication passage 68 communicate with each other, the air in the main valve side pressure chamber 60 passes through the pressure relief passage 64. After passing through, it is possible to flow out from the solenoid valve side pilot hole 58 to the communication passage 68.
As a result, when the pressure in the pressure chamber 60 on the main valve side becomes lower than the water supply pressure in the water supply channel 48a on the primary side, the main valve body 17 moves in the direction of opening the valve, and the water supply port 48c is opened. ing.
As a result, the wash water of the primary side water supply channel 48a that has passed through the constant flow valve 16 flows into the secondary side water supply channel 48b from the water supply port 48c.

As shown in FIGS. 7 and 9, in the event of a power failure, the spindle 56 is moved inside the operation axis O1 in the axial direction by rotating the handle portion 54 of the manual water supply operation device 50 during a power failure in the other direction around the operation axis O1. It is designed to move (proximal to the main valve side pilot hole 62).
As a result, the air in the pressure chamber 60 on the main valve side cannot be depressurized into the pressure relief passage 64 and the communication passage 68, while the wash water in the water supply channel 48a on the primary side around the valve seat 66 is the main valve body. It passes through the bleed hole 72 of 17 and flows into the pressure chamber 60 on the main valve side.
As a result, the pressure in the main valve side pressure chamber 60 is increased, and the diaphragm type main valve body 17 is pressed toward the valve seat 66 by the pressure in the main valve side pressure chamber 60.
As a result, the water supply port 48c is changed from a water flow state opened by the main valve body 17 (see FIG. 9) to a water stop state closed by the main valve body 17 (see FIG. 7).
Therefore, in the event of a power failure, as shown in FIGS. 7 and 9, the washing water in the water supply pipe 6 is supplied to and stopped from the tank unit 22 via the connecting unit 20 by the manual operation of the handle portion 54 (supply). Water stop operation) is possible.

Here, as shown in FIGS. 7 to 9, the axially outer end surface 56b of the spindle 56 of the manual water supply operation device 50 during a power failure always protrudes outward from the axially outer end surface 54a of the handle portion 54. , The axially outer end portion 56b of the spindle 56 is a protruding portion protruding outward in the axial direction of the handle portion 54.
In particular, as shown in FIG. 9, in the state where the main valve body 17 is opened during a power failure, each of the handle portion 54 and the spindle 56 has a shaft rather than the state in which the main valve body 17 shown in FIG. 7 is closed. It is in a position that has moved outward in the direction.
As a result, as shown in FIG. 9, when the main valve body 17 is opened during a power failure, the axially outer end surface 56b of the spindle 56 is in contact with the inner surface of the exterior panel P, and the exterior It is a contact portion that interferes with the panel P.
That is, in the state where the main valve body 17 is opened at the time of a power failure, the axially outer end surface 56b (contact portion) of the spindle 56 projects to the outside in the left-right direction from the mounting position P0 of the exterior panel P.

Next, as shown in FIG. 1, a drainage socket 76 is provided on the downstream side of the drainage trap pipe 2b of the toilet bowl body 2, that is, on the rear side and the lower end outlet portion 2h of the drainage trap pipe 2b. Inside the drainage socket 76, an on-off valve 78 that opens and closes the flow path is provided.
Further, the manual drainage operation device 52 at the time of a power failure holds the operation wire 80 slidably connected to the on-off valve 78 of the drainage socket 76 and the operation wire 80 so as to be slidable with respect to the toilet bowl main body 2. It is provided with a fixing unit 82 for fixing the wire.

Next, the end of the operation wire 80 on the drainage socket side is directly or indirectly connected to a part of the on-off valve 78.
Further, a ring member 84 for gripping is provided at the end of the operation wire 80 on the toilet bowl main body side (user side) so that the user can grip the operation wire 80.
Then, in the event of a power failure, the user grips the ring member 84 and slides the operation wire 80 in the front-rear direction with respect to the fixing unit 82, so that the on-off valve 78 of the drainage socket 76 can be opened and closed. ..

For example, even when the operation of the solenoid valve 18 and the pump 30 of the tank device 4 is stopped at the time of a power failure, the valve unit 14 can be operated by manually rotating the handle portion 54 of the manual water supply operation device 50 at the time of a power failure. The on-off valve (main valve body 17) can be opened and closed to supply and stop water to the water storage tank 10.
Here, in the event of a power failure, first, the on-off valve (main valve body 17) of the valve unit 14 is opened by manually rotating the handle portion 54 of the manual water supply operation device 50 at the time of a power failure, and the water storage tank 10 It is possible to supply water to the water.
Next, the ring member 84 for gripping the manual drainage operation device 52 in the event of a power failure can be manually operated to close the on-off valve 78 of the drainage socket 76.
Then, when the water level in the water storage tank 10 becomes equal to or higher than the predetermined water level and rises to the inside of the water receiving housing 24 above the water storage tank 10, the washing water in the housing 24 flows from the overflow flow path portion (overflow pipe 26) to the pump 30. After the wash water is bypassed to the water supply channel (water discharge pipe 8) on the downstream side of the toilet, it is supplied to the toilet bowl main body 2.
As a result, water can be sealed in the flow path in the drainage socket 76 on the upstream side of the on-off valve 78 of the drainage socket 76 and in the drain trap pipe 2b of the toilet bowl body 2, and the water is stored in the bowl portion 2a of the toilet bowl body 2. Is possible.
Next, when the on-off valve 78 of the drainage socket 76 is opened again by operating the manual drainage operation device 52 at the time of a power failure, the washing water in the bowl portion 2a of the toilet bowl body 2 is discharged from the drainage trap pipe 2b through the drainage socket 76 to the outside. It can be reliably discharged to.
After that, when the handle portion 54 of the manual water supply operation device 50 during a power failure is manually rotated to close the on-off valve (main valve body 17) of the valve unit 14, a series of water supply and drainage operations for the toilet body 2 during a power failure is performed. It is supposed to be completed.

Next, with reference to FIGS. 1 to 9, the operation of the flush toilet bowl 1 according to the above-described embodiment of the present invention will be described.
Apart from the flush toilet bowl 1 according to the present embodiment, tentatively, the water stopcock 12 to the tank water supply unit (connecting unit 20) is required to have a strength that can withstand a relatively high water supply pressure on the primary side (upstream side) of the valve unit 14. When the pipeline of the water supply pipe 6 up to the water supply nozzle 23) is made into a single water supply pipeline, the length of the pipeline becomes long, and there are many design restrictions such as the arrangement and handling of the water supply pipeline. ..
On the other hand, according to the water-washing stool 1 according to the present embodiment, the water supply passage from the water stop valve 12 to the tank water supply unit (water supply nozzle 23 of the connecting unit 20) is the inlet portion from the water stop valve 12 to the valve unit 14. Divide into two water supply pipes, an upstream water supply pipe 6a extending to 14a and a downstream water supply pipe 6b extending from the outlet portion 14b of the valve unit 14 to the tank water supply portion (water supply nozzle 23 of the connecting unit 20). Therefore, it is possible to improve the degree of freedom in designing the arrangement and handling of the water supply pipes 6a and 6b, respectively.
As a result, the degree of freedom in designing the tank device 4 can be improved, and the tank capacity of the water storage tank 10 can be secured.
Further, while the valve unit 14 is provided below the outer bottom surface of the water storage tank 10 (more specifically, the bottom surface 46a of the rear side small tank portion 46a and the front side small tank portion 46b of the water storage tank 10), while The backflow prevention portion B (water receiving housing 24 of the connecting unit 20, overflow pipe 26, check valve 28) is provided above the water storage tank 10.
As a result, the valve unit 14 and the backflow prevention portion B can be provided separately from each other, so that the internal flow path of the valve unit 14 can be simplified and the entire valve unit 14 can be miniaturized. can.
Further, by providing the valve unit 14 and the backflow prevention unit B separately from each other, the water supply path (downstream water supply pipe line 6b) from the valve unit 14 to the tank water supply unit (water supply nozzle 23 of the connecting unit 20) is arranged. It is also possible to improve the degree of freedom in designing such as.
Further, since the valve unit 14 is provided below the outer bottom surface of the water storage tank 10 (more specifically, the bottom surface 46a of the rear side small tank portion 46a and the front side small tank portion 46b of the water storage tank 10). The valve unit 14 can be provided by effectively utilizing the limited space in the rear region R1 of the toilet bowl main body 2 and in the lower region of the water storage tank 10. Therefore, a larger tank capacity of the water storage tank 10 can be secured.
Further, as compared with the case where the valve unit 14 is provided above the water storage tank 10, it is possible to realize a lower silhouette and a smaller size of the entire tank device 4 and the entire flush toilet bowl 1.
Further, since the backflow prevention unit B is provided above the water storage tank 10, it is possible to prevent the washing water in the water storage tank 10 from flowing back to the downstream water supply pipe line 6b.

Next, according to the flush toilet bowl 1 according to the present embodiment, the valve unit 14 could be provided on the water stop valve 12 side below the outer bottom surface of the water storage tank 10.
Further, the upstream water supply pipe line 6a extending from the water stop valve 12 to the inlet portion 14a of the valve unit 14 could be formed of a pipe member T having a rigidity higher than that of the flexible hose member H. In addition, the downstream water supply pipe line 6b extending from the outlet portion 14b of the valve unit 14 to the tank water supply portion (connection portion C2 of the water supply nozzle 23) could be formed by the flexible hose member H.
Therefore, the upstream water supply pipe line 6a extending from the water stop valve 12 to the inlet portion 14a of the valve unit 14 is more than the flexible hose member H so as to withstand the relatively high primary side (upstream side) water supply pressure. By adopting a highly rigid pipe member T and setting it shorter than the length of the downstream water supply pipe 6b, the strength of the upstream water supply pipe 6a can be ensured.
On the other hand, in the downstream water supply line 6b extending from the outlet portion 14b of the valve unit 14 to the tank water supply part (water supply nozzle 23 of the connecting unit 20), a flexible hose member H is adopted and the upstream water supply line 6a is adopted. By setting the hose member H (downstream water supply pipe line 6b) longer than the length of the hose member H, it is possible to improve the degree of freedom in design such as the arrangement and handling of the hose member H (downstream water supply pipe line 6b).
As a result, the tank capacity of the water storage tank 10 and the surrounding space can be secured, so that the degree of freedom in designing the entire tank device 4 and the entire flush toilet bowl 1 can be improved.

Next, according to the flush toilet bowl 1 according to the present embodiment, the connection portion C2 between the outlet portion of the downstream water supply pipe line 6b and the tank water supply portion (the inlet portion of the water supply nozzle 23 of the connecting unit 20) is connected to the water storage tank 10. Is also located above.
Further, by providing the outlet portion 14b of the valve unit 14 so as to be close to the outer bottom surface of the water storage tank 10, it is possible to prevent the hose member H (downstream water supply pipe line 6b) from becoming unnecessarily long. Can be done.
Therefore, it is possible to suppress unnecessary occupancy of the hose member H (downstream water supply pipe line 6b) with respect to the accommodating area R1 of the water storage tank 10 behind the toilet bowl main body 2.
Therefore, the region R1 behind the toilet bowl body 2 can be widely utilized, and the degree of freedom in designing the tank device 4 can be improved.
Further, it is possible to suppress the vertical length of the hose member H (downstream water supply pipe line 6b) from the outlet portion 14b (connection portion C1) of the valve unit 14 to the inlet portion (connection portion C2) of the water supply nozzle 23. can.
Therefore, the size of the entire tank device 4 in the vertical direction can be reduced, and the size of the entire flush toilet bowl 1 in the vertical direction can also be reduced.

Next, according to the flush toilet bowl 1 according to the present embodiment, the front end of the outlet portion 14b of the flow path of the valve unit 14 is located on the front side of the front end 46e of the water storage tank 10.
As a result, the distance between the valve unit 14 and the toilet body 2 in the front-rear direction can be shortened.
Therefore, when the hose member H (downstream water supply pipe line 6b) from the outlet portion 14b (connection portion C1) of the valve unit 14 to the inlet portion (connection portion C2) of the water supply nozzle 23 is bypassed from the front of the water storage tank 10. , The distance in the front-rear direction of the hose member H (downstream water supply pipe line 6b) can also be shortened.
Therefore, since it is possible to prevent the path length L1 of the hose member H (downstream water supply pipe line 6b) from becoming unnecessarily long, the region R1 behind the toilet bowl body 2 can be widely utilized, and the region R1 can be widely used. The degree of freedom in designing the tank device 4 can be further improved.

Next, according to the flush toilet bowl 1 according to the present embodiment, the connection portion C1 between the outlet portion 14b of the valve unit 14 and the hose member H (downstream side water supply pipe line 6b) is directed to the front side. As a result, when the hose member H (downstream side water supply pipe line 6b) is bypassed from the front of the water storage tank 10, the connection part C1 between the outlet portion 14b of the valve unit 14 and the hose member H (downstream side water supply pipe line 6b). The distance of the hose member H (downstream water supply pipe line 6b) from the water supply nozzle 23 to the inlet portion (connection portion C2) in the front-rear direction can also be shortened.
Therefore, since it is possible to prevent the path length L1 of the hose member H (downstream water supply pipe line 6b) from becoming unnecessarily long, the region R1 behind the toilet bowl body 2 can be widely utilized, and the region R1 can be widely used. The degree of freedom in designing the tank device 4 can be further improved.

Next, according to the water-washing toilet bowl 1 according to the present embodiment, even if the washing water in the water storage tank 10 rises to the inside of the small tank (water receiving housing 24), the washing water in the water receiving housing 24 is used. It can flow out from the overflow pipe 26 to the toilet body 2 side. As a result, it is possible to prevent the washing water in the water receiving housing 24 from flowing back to the hose member H (downstream water supply pipe line 6b).
Further, the check valve 28 can prevent the washing water flowing out from the water receiving housing 24 into the overflow pipe 26 from flowing back.

Next, according to the flush toilet bowl 1 according to the present embodiment, the manual water supply operation device 50 during a power failure enables the opening and closing of the on-off valve (diaphragm type main valve body 17) of the valve unit 14 to be manually operated in the event of a power failure. It is provided.
Further, a manual operation unit (handle portion 54) of the manual water supply operation device 50 at the time of a power failure is provided so as to be directed to the side side of the toilet bowl main body 2.
As a result, in an emergency such as a power failure, the user can easily see the handle portion 54 of the manual water supply operation device 50 at the time of a power failure, and can easily access the handle portion 54.
Therefore, the visibility and operability of the handle portion 54 of the manual water supply operation device 50 at the time of a power failure can be improved.
Further, since the handle portion 54 of the manual water supply operation device 50 in the event of a power failure is directed to the side side of the toilet body 2, the outlet portion 14b of the valve unit 14 to the inlet portion (connection portion C2) of the water supply nozzle 23. The handle portion 54 of the manual water supply operation device 50 in the event of a power failure interferes with the hose member H (downstream side water supply line 6b) even when the hose member H (downstream side water supply line 6b) is bypassed from the front of the water storage tank 10. It does not affect the distance in the front-rear direction of the hose member H (downstream water supply pipe line 6b).
Therefore, since it is possible to prevent the path length L1 of the hose member H (downstream water supply pipe line 6b) from becoming unnecessarily long, the region R1 behind the toilet bowl body 2 can be widely utilized.
Further, the degree of freedom in designing the tank device 4 capable of manually supplying and stopping the on-off valve (diaphragm type main valve body 17) of the valve unit 14 in the event of a power failure can be further improved.

Next, according to the flush toilet bowl 1 according to the present embodiment, the water storage tank 10 is arranged so as to surround the upper part of the drain trap pipe 2b from both the left and right sides and the rear side.
As a result, the water storage tank 10 can be arranged by effectively utilizing the limited space of the rear region R1 of the toilet bowl main body 2.
Therefore, it is possible to realize a low silhouette and miniaturization of the entire tank device 4 and the entire flush toilet bowl 1 while securing a larger tank capacity of the water storage tank 10.

Next, according to the flush toilet bowl 1 according to the present embodiment, the water storage tank 10 can be formed into a left-right asymmetrical shape by the large tank main body (large tank 44) and the small tank main body (small tank 46). did it.
Further, the backflow prevention portion B (water receiving housing 24 of the connecting unit 20, overflow pipe 26, check valve 28) could be provided above the water storage tank 10.
Further, the valve unit 14 could be provided on the bottom surface 46c of the small tank portion 46 of the water storage tank 10.
As a result, the limited space of the rear region R1 of the toilet bowl main body 2 can be effectively utilized, and a larger tank capacity of the water storage tank 10 can be secured.
Further, it is possible to realize a low silhouette and miniaturization of the entire tank device 4 and the entire flush toilet bowl 1.

Next, according to the flush toilet bowl 1 according to the present embodiment, regarding the water storage tank 10, the rear side large tank part 44a, the front side large tank part 44b, the lower side large tank part 44c, and the small tank part 44 of the large tank part 44, and the small tank part Each of the rear side small tank portion 46a and the front side small tank portion 46b of the portion 46 can form a left-right asymmetrical shape.
Further, a backflow prevention portion B (water receiving housing 24 of the connecting unit 20, overflow pipe 26, check valve 28) is provided above the large tank portion 44b on the front side of the water storage tank 10, and the valve unit 14 stores water. It is provided on the bottom surface 46c of the small tank portion 46b on the front side of the tank 10.
As a result, the space occupied by each of the backflow prevention unit B and the valve unit 14 can be suppressed.
Therefore, the valve unit 14 can be provided by effectively utilizing the limited space below the water storage tank 10 and the rear region R1 of the toilet body 2, and the tank capacity of the water storage tank 10 can be secured larger. ..
In addition, it is possible to realize a low silhouette and miniaturization of the entire tank device 4 and the entire flush toilet bowl 1.

1 Washing toilet bowl 2 Toilet bowl body 2a Bowl part 2b Drain trap pipe (drain trap part)
2c Rim part 2d Rim headrace 2e Rim headrace inlet 2f Rim spout 2g Drain trap pipe inlet 2h Drain trap pipe outlet 2i Rim top surface 4 Tank device 6 Water supply pipe (water supply channel)
6a Upstream side water supply pipe 6b Downstream side water supply pipe 8 Water discharge pipe 8a Outlet part of water discharge pipe 10 Water storage tank (water storage tank body)
10a Upper opening 10b Outer upper surface of water storage tank 12 Stopcock 14 Valve unit 14a Valve unit inlet 14b Valve unit outlet 16 Constant flow valve 17 Diaphragm type main valve body (open / close valve)
18 Solenoid valve 20 Connection unit (tank water supply section)
22 Tank unit 23 Water supply nozzle (tank water supply section, water discharge section)
23a Water supply port (tank water supply section, water discharge section)
24 Water receiving housing (tank water supply part, backflow prevention part, small tank)
24a Lower opening 24b Side wall 24c Overflow port 26 Overflow pipe (tank water supply part, backflow prevention part)
28 Check valve (tank water supply part, backflow prevention part)
30 Pump 32 Float switch 32a Detector 34 Drain plug 36 Water pipe (outer water pipe)
36a Upstream end of water pipe 38 Suction pipe 38a Downstream end of suction pipe 40 Tank body 40a Bottom of tank body 42 Dew-proof material 42a Outer top surface of dew-proof material 44 Large tank part (large dunk body part)
44a Rear large tank (rear large tank body)
44b Front large tank (front large tank body)
44c Lower side large tank part (Lower side large tank body part)
44d Bottom of the large tank on the lower side 44e Top of the large tank on the front side 44f Front end of the large tank on the front side 44g Side wall of the large tank 46 Small tank (small tank body)
46a Rear side small tank part (rear side small tank body part)
46b Front side small tank part (front side small tank body part)
46c Bottom of the rear small tank and front small tank 46d Top of the rear small tank 46e Front end of the front small tank 46f Side wall of the small tank 48 Valve unit body 48a Valve unit body Primary side water supply channel 48b Secondary side water supply channel of the main body of the valve unit 48c Water supply port 49 Mounting member 50 Manual water supply operation device (manual operation unit) in the event of a power failure
52 Manual drainage operation device at the time of power failure 54 Handle part (manual operation part)
54a Axial outer end face of handle 56 Spindle (operation shaft)
56a Spindle tip 56b Axial outer end of spindle, outer end face 58 Electromagnetic valve side pilot hole 60 Main valve side pressure chamber 62 Main valve side pilot hole 64 Pressure relief passage 66 Valve seat 68 Continuous passage 70 O-ring 72 Bleed Hole 74 Fastener 76 Drainage socket 78 On-off valve 80 Operation wire 82 Fixing unit 84 Ring member for gripping A1 Lead surface that divides the water storage tank into two at the center of the left and right B Backflow prevention part C Controller C1 Outlet part of valve unit and downstream water supply Connection with pipeline C2 Connection between outlet of downstream water supply pipeline and water supply nozzle D Pump drive F1 Floor surface H Hose member L1 Length of downstream water supply pipeline and hose member L2 Upstream water supply pipe Length of road and pipe members O1 Operation axis of handle operation part P Exterior panel P0 Exterior panel mounting position
P1 Minimum position of the bottom surface of the large tank section (lower side large tank section) P2 Minimum position of the bottom surface of the small tank section (rear side small tank section and front side small tank section) P3 Large tank section (front side large tank section) Highest position on the upper surface P4 Maximum position on the upper surface of the small tank part (rear side small tank part) P5 Front end position of the front side large tank part P6 Front end position of the front side small tank part R1 Rear area of the toilet bowl, storage area of the water storage tank S1 Large tank accommodating part of the toilet bowl S2 Small tank accommodating part of the toilet bowl T pipe member V1 Large tank volume V2 Small tank accommodating W1 Washing water

Claims (10)

A flush toilet that is washed with wash water and discharges filth.
A toilet body including a bowl portion that receives filth, a rim portion formed on the upper edge of the bowl portion, and a drain trap portion that discharges filth in the bowl portion.
It has a tank device provided behind the toilet bowl body and supplies washing water to the toilet bowl body.
The above tank device has a water supply channel through which the wash water supplied from the water supply source passes.
A valve unit including an on-off valve provided on the downstream side of the water stopcock of the water supply channel to open and close the water supply channel, and
A water storage tank body provided behind the toilet bowl body and above the floor surface to store the washing water supplied from the water supply channel, and a water storage tank body.
It is equipped with a tank water supply unit that supplies the washing water in the water supply channel to the water storage tank body.
The water supply channel includes an upstream water supply line extending from the water stopcock to the inlet of the valve unit, and a downstream water supply line extending from the outlet of the valve unit to the tank water supply.
The tank water supply unit includes a water discharge unit that discharges wash water supplied from the downstream water supply pipeline to the water storage tank body, and a water discharge unit that is provided on the upstream side of the water storage tank body and is provided from the water discharge unit to the inside of the water storage tank body. It is equipped with a backflow prevention unit that prevents the wash water discharged from the water from flowing back to the downstream water supply pipeline.
The water-washing toilet bowl is characterized in that the valve unit is provided on the outer bottom surface of the water storage tank main body or below the outer bottom surface thereof, and the backflow prevention portion is provided above the water storage tank main body. The valve unit is provided on the water stop valve side below the outer bottom surface of the water storage tank body.
The downstream water supply line is formed of a flexible hose member, and the upstream water supply line is made of a pipe member having a higher rigidity than the flexible hose member.
The flush toilet according to claim 1, wherein the length of the downstream water supply pipe is set longer than the length of the upstream water supply pipe. The connection between the outlet of the downstream water supply pipeline and the tank water supply is located above the water storage tank body, and the outlet of the valve unit is close to the outer bottom surface of the water storage tank body. The flush toilet according to claim 2. The water-washing toilet according to claim 2 or 3, wherein the valve unit is provided so that its outlet portion is located on the front side of the water storage tank main body. The water-washing toilet according to any one of claims 2 to 4, wherein the valve unit has a connection portion with the downstream water supply pipe directed to the front side. The backflow prevention unit is provided above the water storage tank body so as to be communicable with the small tank that allows the washing water discharged from the water discharge unit to flow out into the water storage tank body, and the water storage unit that is connected to the small tank. It is equipped with an overflow pipe that allows the washing water that overflows from the tank body to the small tank to flow out to the toilet body side, and a check valve that prevents the washing water from flowing back into the small tank from the overflow pipe. The water-washing toilet according to any one of claims 1 to 5. The valve unit is provided with a manual operation unit that allows the opening and closing of the on-off valve to be manually operated in the event of a power failure, and the manual operation unit is provided so as to be directed to the side side of the toilet bowl body. The flush toilet according to any one of claims 1 to 6. The drain trap portion extends in the front-rear direction from the inlet portion connected to the bowl portion toward the outlet portion behind the bowl portion in a plan view.
The water-washing toilet according to any one of claims 1 to 7, wherein the water storage tank main body is arranged so as to surround the upper part of the drain trap portion from both the left and right sides and the rear side. The water storage tank body is a large tank body that has a large volume when it is divided into two at the center of the left and right, and a small tank body that has a small volume when the water storage tank is divided into two at the center of the left and right. And, with a left-right asymmetrical shape,
The water-washing size according to any one of claims 1 to 8, wherein the backflow prevention portion is provided above the large tank main body portion, and the valve unit is provided on the bottom surface of the small tank portion. Toilet bowl. The large tank main body is a rear large tank main body arranged on the rear side of the drain trap portion, and a front extending forward from the rear large tank main body and arranged on one of the left and right sides of the drain trap. It is provided with a large tank body on the side and a large tank on the lower side extending downward from the large tank on the rear side.
The small tank main body is a rear small tank main body arranged on the rear side of the drain trap part, and a front extending forward from the rear small tank main body and arranged on the left and right other sides of the drain trap. It is equipped with a small tank body on the side.
The front end of the large tank body on the front side is arranged in front of the front end of the small tank body on the front side.
The bottom surfaces of the rear small tank body and the front small tank body are located above the bottom surface of the lower large tank body.
The water-washing toilet according to claim 9, wherein the backflow prevention portion is provided above the front-side large tank main body, and the valve unit is provided on the bottom surface of the front-side small tank main body.

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