JP7362034B2 - flush toilet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flush toilet, and particularly to a flush toilet that is flushed with flushing water and discharges waste.

Conventionally, flush toilets that are flushed with flush water and discharged waste have been equipped with a water storage tank that stores flush water to be supplied to the toilet body, and a toilet user, as described in Patent Documents 1 and 2, for example. A device equipped with a private parts cleaning device for cleaning the private parts of the body is known.
In these conventional flush toilets, the private parts cleaning device is placed on the upper surface of the toilet main body behind the bowl part, and the water storage tank is placed behind the private parts cleaning device, so that the cleaning water tank and the private parts are Each of the cleaning devices is built into the rear of the toilet bowl body.
Furthermore, in the conventional flush toilet described in Patent Document 1, an intake pipe is provided inside a casing in which a private part cleaning device is housed outside a closed water storage tank. Thereby, the air inside the casing is sucked into the water storage tank through the intake pipe.
Furthermore, the steam generated in the water storage tank is cooled by passing through the intake pipe and becomes condensed water, which falls into a drainage channel formed in the lower casing plate, and then flows through this drainage channel to the bowl of the toilet bowl. It is meant to be guided. This makes it possible to prevent malfunctions such as short-circuiting of the private parts cleaning device housed in the casing due to condensed water.
Furthermore, in the conventional flush toilet described in Patent Document 2, the water storage tank is provided with an intake/exhaust port that replaces air within the tank when flushing water is supplied and discharged. This intake/exhaust port is connected to an opening provided in the tank cover, so that air exchange with outside air can be performed directly without going through the space between the tank cover and the water storage tank. It has become.

Japanese Patent Application Publication No. 2015-68054 Japanese Patent Application Publication No. 2011-144521

In addition, in recent years, in order to improve and diversify the design of flush toilets, it has become a challenge to design the height of the entire top of the flush toilet as low as possible, or so-called "low silhouette."
Therefore, the challenge is how to make the toilet bowl low-profile while ensuring an appropriate tank capacity to enable flushing.
In addition, around the water storage tank of the flush toilet, there are functional parts of the water supply system that supplies water to the water storage tank and private cleaning device, related equipment (including electronic parts, etc.), and electronic equipment such as controllers that control these. It is provided.
Therefore, if you try to achieve a low silhouette toilet by installing the water storage tank behind the toilet body, the installation space for the water storage tank behind the toilet body, the local cleaning device, and their peripheral equipment will be limited to the space behind the toilet body. There is limited space between it and the external wall (the wall where the toilet is installed).
Therefore, from the perspective of equipment protection for peripheral equipment such as the functional parts of the private cleaning device around the water storage tank, how can we effectively utilize the limited installation space behind the toilet bowl and take measures to ensure ventilation between the water storage tank and the outside? One of the important issues is how to take measures against condensation caused by water vapor and water vapor in water storage tanks.
In particular, electrical equipment in the functional parts of the water supply system around the water storage tank of the tank equipment and electronic parts in the functional parts of the local cleaning device must be resistant to external loads such as water leakage and moisture due to condensation from the water storage tank side. There is a problem of low gender.
Therefore, one of the important issues is whether to ensure the reliability of the functional parts of the water supply system around the water storage tank and the functional parts of the private parts cleaning device against these external loads.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional technology, and can effectively suppress leakage of condensed water from the water storage tank side, and can effectively prevent leakage of condensed water from the tank device related equipment and peripheral equipment. The purpose is to provide a flush toilet that can ensure reliability.

In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flushing water and discharges filth, which comprises a bowl portion for receiving filth, a rim portion formed on the upper edge of the bowl portion. , a toilet main body comprising: a drainage trap section for discharging filth in the bowl section; a tank device provided at the rear of the toilet main body to supply wash water to the toilet main body; and a rear upper surface of the toilet main body. and a local cleaning device disposed adjacent to the tank device, and the tank device includes a water supply section that supplies cleaning water supplied from a water supply source, and a water supply section located behind the toilet main body and on the floor. a water storage tank main body that is provided above the surface and stores flush water to be supplied to the toilet main body; and a small tank that is provided in communication with the upper part of the water storage tank main body and to which a water supply pipe of the water supply section is connected. , the small tank includes a cylindrical housing part provided on the upper part of the water storage tank body, a cover part provided to cover the upper part of the housing part, and the housing part or the cover. a ventilation path including a vent provided on at least one side of the housing section for ventilating the inside and outside of the housing section; The present invention is characterized in that a dew condensation water guide portion is provided that guides dew condensation water into the housing portion other than the air passage.
In the present invention configured in this way, for example, if water vapor is generated by the cleaning water in the water storage tank main body and rises to the inside of the small tank, or if water vapor is generated by the cleaning water in the housing of the small tank itself. When the water vapor rises, such rising water vapor adheres to the top surface of the cover of the small tank, and is then cooled and becomes condensed water.
Then, such dew condensation water is guided into the housing part other than the air passage by a dew condensation water guiding part provided on the top surface of the cover part of the small tank.
Therefore, it is possible to suppress the condensed water adhering to the condensed water guide portion from leaking out of the housing portion from the air passage.
Therefore, there is a risk that the local cleaning device placed adjacent to the tank device, peripheral equipment and electrical components installed near the outside of the small tank will malfunction due to exposure to moisture from condensed water leaking from the small tank. can be reduced.
As a result, leakage of condensed water from the water storage tank and the water receiver housing can be effectively suppressed, and the reliability of related equipment and peripheral equipment of the tank device can be ensured.

In the present invention, preferably, the dew condensation water guiding section is configured to guide dew condensation water to a region inside the housing section inside the ventilation path in plan view.
In the present invention configured in this manner, the condensation water guide portion can reliably guide the condensation water to a region inside the housing portion inside the air passage.
Therefore, it is possible to suppress the condensed water introduced into the housing section by the condensed water guide section from leaking from the vent via the ventilation path.

In the present invention, preferably, the small tank further includes a vertical wall portion extending upward and/or downward from the outside of the condensation water guide portion on the top surface of the cover portion and forming the ventilation path.
In the present invention configured in this manner, even if the condensed water introduced into the housing by the condensation water guide part were to infiltrate into the air passage, the condensed water would not return to the housing through the vertical wall. It will be.
Therefore, it is possible to effectively suppress the condensed water introduced into the housing section by the condensed water guide section from leaking out of the vent via the ventilation path.

In the present invention, preferably, the vertical wall portion extends at least downwardly from the outside of the dew condensation water guide portion on the top surface of the cover portion to form the air passage, and the dew condensation water guide portion conducts dew condensation water. It is configured to lead from the inside of the top surface of the cover section outward to an area within the housing section other than the air passage.
In the present invention configured in this manner, the condensed water adhering to the top surface of the cover portion of the small tank is directed from the inside of the top surface of the cover portion to the outside by the condensation water guiding portion to the area inside the housing portion other than the air passage. guided by.
At this time, even if the condensed water guided from the inside to the outside of the top surface of the cover part were to adhere to the vertical wall part extending downward from the outside of the condensation water guide part and forming the ventilation path, the condensed water would It flows down along the vertical wall portion and is reliably returned into the housing portion.
Therefore, it is possible to more effectively suppress condensed water from leaking from the vent through the vent passage.

In the present invention, preferably, the dew condensation water guide section includes an inclined surface that slopes downward from inside to outside of the top surface of the cover section.
In the present invention configured in this manner, condensed water adhering to the top surface of the cover section of a small tank is removed from the inside of the top surface of the cover section toward the outside by the simple structure of the inclined surface of the condensation water guide section. After guiding, it can be reliably guided into the housing part.

In the present invention, preferably, the cover part is attached to the upper part of the housing part so that its side wall is located inside the side wall of the housing part.
In the present invention configured in this way, the cover part is attached to the upper part of the housing part so that the side wall thereof is located inside the side wall of the housing part, so that the top surface of the cover part of the small tank, etc. The condensed water that adheres to the top surface of the cover and is guided outward from the inside of the top surface of the cover can flow down along the side wall of the cover.
Thereby, the dew condensation water can be reliably guided into the region inside the side wall of the housing portion.

In the present invention, preferably, the small tank is disposed on the rear side of the private part cleaning device, and the ventilation path is disposed in the center of the small tank in the front-rear direction so as to be distal to the private part cleaning device. It is located at the rear of the section.
In the present invention configured in this way, the small tank placed on the rear side of the private parts cleaning device is arranged so that the air passage is distal to the private parts cleaning device, so that the small tank is placed behind the center of the small tank in the front-rear direction. By placing it on the side, even if condensed water inside the housing leaks from the ventilation path to the outside of the small tank, the ventilation path is distal to the local cleaning device, so it will not cause any damage to the private parts. It is possible to reduce the risk of the cleaning device being exposed to moisture from condensed water leaking from the small tank.

In the present invention, preferably, the ventilation path is formed so that the ventilation hole is directed to the rear side after extending from an outer region in the housing part to a top surface of the cover part.
In the present invention configured in this way, after the ventilation path extends from the outside area within the housing section to the top surface of the cover section, the ventilation hole is formed to face toward the rear side. It is possible to make it difficult for condensed water to leak out from the vent through the vent passage.
In addition, in addition to the ventilation path being distal to the private cleaning device, the ventilation port is directed toward the rear, so that in the unlikely event that condensed water in the housing leaks from the ventilation port into the small tank. Even if it leaks to the outside, the risk of the local cleaning device being exposed to the moisture of the condensed water leaking from the small tank can be effectively reduced.

In the present invention, preferably, the vent hole is formed by cutting out the rear upper edge of the housing part, and the cover part has an upper surface that is a horizontal surface that is substantially flush with the upper edge of the housing part. It becomes.
In the present invention configured in this manner, the vent hole is formed by cutting out the rear upper edge of the housing portion, and the upper surface of the cover portion is a horizontal surface that is substantially flush with the upper edge of the housing portion. Therefore, the height dimension of the small tank can be suppressed.
Therefore, the entire tank device and the entire flush toilet can be made low-profile and compact.

In the present invention, preferably, the drain trap section extends in the front-rear direction from an inlet section connected to the bowl section toward an outlet section rearward of the bowl section in plan view, and are arranged so as to surround the upper part of the drain trap section from both left and right sides and from the rear side.
In the present invention configured in this way, the water storage tank body is arranged so as to surround the upper part of the drain trap part from both left and right sides and from the rear side, so that the limited space behind the toilet body can be effectively utilized. The main body of the water storage tank can then be placed.
Therefore, it is possible to achieve a low silhouette and downsizing of the entire tank device and the entire flush toilet while ensuring a larger tank capacity of the water storage tank main body.

In the present invention, preferably, the water storage tank main body has a large tank main body that has a larger volume when divided into two at the center of the left and right, and a large tank main body that has a smaller 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 main body part being a side, and the small tank is provided above the large tank main body part.
In the present invention configured as described above, the water storage tank main body has a left-right asymmetrical shape with a large tank main body and a small tank main body, and the small tank is provided above the large tank main body of the water storage tank main body. This makes it 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 achieve a low silhouette and downsizing of the entire tank device and the entire flush toilet.

In the present invention, preferably, the large tank body includes a rear large tank body disposed on the rear side of the drain trap, and a rear large tank body extending forward from the rear large tank body to the left and right sides of the drain trap. It includes a front large tank main body disposed on one side and a lower large tank main body extending downward from the rear large tank, and the small tank main body is arranged at the rear of the drain trap part. and a front small tank main body extending forward from the rear small tank main body and disposed on the other left and right sides of the drain trap, The front end of the front large tank main body is located further forward than the front end of the front small tank main body, and the bottom surface of the lower large tank main body is located closer to the rear small tank main body and the front small tank main body. The small tank is located below the bottom surface of each of the small tank main bodies, and the small tank is provided above the front large tank main body.
In the present invention configured in this way, the water storage tank main body includes the rear large tank main body, the front large tank main body, and the lower large tank main body of the large tank main body, and the rear large tank main body of the small tank main body. The side small tank main body and the front small tank main body can form an asymmetrical shape, and since the small tank is provided above the front large tank main body, the small tank occupies the main tank. Space can be saved.
Therefore, 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 achieve a low silhouette and downsizing of the entire tank device and the entire flush toilet.

According to the flush toilet of the present invention, leakage of condensed water from the water storage tank side can be effectively suppressed, and reliability of related equipment and peripheral equipment of the tank device can be ensured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a flush toilet according to a first embodiment of the present invention, viewed diagonally from behind and from above. 1 is an overall configuration diagram of a flush toilet according to a first embodiment of the present invention. FIG. 2 is a partially enlarged plan view of the tank unit of the flush toilet according to the first embodiment of the present invention. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. FIG. 1 is a perspective view of the water storage tank of the flush toilet according to the first embodiment of the present invention, viewed obliquely from the rear and above. FIG. 2 is a rear view of the water storage tank of the flush toilet according to the first embodiment of the present invention. FIG. 4 is a sectional view taken along line VII-VII in FIG. 3, showing a flush toilet according to the first embodiment of the present invention in which a private part cleaning device is provided on the upper surface on the rear side of the toilet main body. FIG. 8 is a partially enlarged side cross-sectional view of the water receiving housing portion of the flush toilet according to the first embodiment of the present invention shown in FIG. 7; FIG. 7 is a perspective view of a water receiver housing of a flush toilet according to a second embodiment of the present invention, viewed obliquely from the rear and above. 10 is a sectional view taken along line XX in FIG. 9. FIG. FIG. 7 is a perspective view of a water receiver housing of a flush toilet according to a third embodiment of the present invention, viewed diagonally from the front and above. 12 is a sectional view taken along line XII-XII in FIG. 11. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A flush toilet according to a first embodiment of the present invention will be described below with reference to the accompanying drawings.
First, FIG. 1 is a schematic perspective view of a flush toilet according to a first embodiment of the present invention, viewed diagonally from behind and from above. Further, FIG. 2 is an overall configuration diagram of the flush toilet according to the first embodiment of the present invention.
As shown in FIGS. 1 and 2, a flush toilet 1 according to a first embodiment of the present invention includes a toilet main body 2 made of ceramic and a tank device 4 provided on the rear side thereof.
The toilet main body 2 also includes a bowl part 2a for receiving waste, a drain trap part (drain trap pipe 2b) extending from the bottom of the bowl part 2a and discharging waste in the bowl part 2a, and an upper edge of the bowl part 2a. A rim portion 2c formed in the rim portion 2c is provided.

Next, as shown in FIGS. 1 and 2, the tank device 4 includes a water supply pipe 6 (water supply section) 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 a water storage tank 10 (details will be described later) of the tank device 4. With these, 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 stopcock 12 and a valve unit 14, respectively, from the upstream side to the downstream side.
Further, the valve unit 14 includes a constant flow valve 16 provided in the water supply pipe 6, and an electromagnetic valve 18 that opens and closes an on-off valve (diaphragm valve 17) provided downstream of the constant flow valve 16.

Next, as shown in FIGS. 1 and 2, the tank device 4 further includes a connection unit 20 connected to the downstream side of the valve unit 14 of the water supply pipe 6, and a connection unit 20 connected to the downstream side of this connection unit 20. and a tank unit 22 including a water storage tank 10.
In the valve unit 14, the flow rate of the cleaning water in the water supply pipe 6 is adjusted to be constant by a constant flow valve 16.
Thereafter, 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 valve 17), the wash water in the water supply pipe 6 passes through the connection unit 20 and flows into the tank unit 22. It is now being supplied.
That is, the entire valve unit 14 functions together with the water supply pipe 6 as a water supply section that supplies the water storage tank 10 with wash water supplied from a water supply source such as a tap.

As shown in FIG. 2, the connection unit 20 includes a water receiving housing 24 (small tank), an overflow pipe 26, and a check valve 28.
Further, the lower opening 24a of the water receiver housing 24 is removably connected to the upper opening 10a of the water storage tank 10 of the tank unit 22.
Note that details of the water receiving housing 24 will be described later.

Next, the overflow pipe 26 connects the overflow port 24b provided in a part of the side wall of the water receiver housing 24 and the water discharge pipe 8.
The water discharge pipe 8 is a connection pipe (wash water supply pipe) connected to the pump 30 of the tank device 4 on its upstream side, and is connected to the rim water conduit 2d inside the rim portion 2c of the toilet main body 2 on its downstream side. There is.
Further, the check valve 28 is provided at the overflow port 24b, and allows the wash water in the water receiver housing 24 to flow into the overflow pipe 26 from the overflow port 24b, while the wash water in the overflow pipe 26 It is possible to prevent the water from flowing back into the water receiving housing 24.

Next, as shown in FIG. 2, 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.
The pump 30 is provided in a part (midway) of a water pipe 36 connected to the upstream side of the water discharge pipe 8. An upstream end 36a of this water pipe 36 is connected to a downstream end 38a of a suction pipe 38 provided inside the water storage tank 10.

When the pump 30 operates, the cleaning water stored in the water storage tank 10 is sucked into the water pipe 36 from the suction pipe 38, and then is pumped through the pump 30 to the water discharge pipe 8. There is.
Thereby, 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 conduit 2d from the inlet 2e of the rim conduit 2d.
The flushing water in the rim conduit 2d is then discharged into the bowl portion 2a from the rim spout 2f at the downstream end of the rim conduit 2d, so that toilet bowl cleaning (so-called toilet bowl cleaning using 100% rim water discharge) is performed. 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 by the pump 30 from the water storage tank 10 to the toilet main body 2.

The float switch 32 detects the water level in the water storage tank 10. The opening/closing operation of the electromagnetic 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 below a predetermined level, the electromagnetic 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 electromagnetic valve 18 is closed, the water supply pipe 6 is closed, and the pump 30 is stopped.
Furthermore, under the control of the controller C, the pump 30 can be driven while water is being supplied from the water supply pipe 6 to the water storage tank 10, and flush water can be force-fed from the water storage tank 10 to the toilet main body 2. Water can be supplied to the toilet bowl 10 and flush water can be supplied from the pump 30 to the toilet main body 2 at the same time.

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

Next, details of the water storage tank 10 of the tank unit 22 will be explained with reference to FIGS. 3 to 6.
FIG. 3 is a partially enlarged plan view of the tank unit of the flush toilet according to the first embodiment of the present invention. Further, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3.
First, as shown in FIGS. 3 and 4, the water storage tank 10 of the tank unit 22 includes a single tank body 40 and a dew-proof material 42 that covers the outside of this tank body 40.
Next, FIG. 5 is a perspective view of the water storage tank of the flush toilet according to the first embodiment of the present invention, viewed diagonally from behind and from above. Moreover, FIG. 6 is a rear view of the water storage tank of the flush toilet according to the first embodiment of the present invention.
As shown in FIGS. 3 to 6, if an imaginary vertical plane that divides the water storage tank 10 of the tank unit 22 into two at the left and right center is "vertical plane A1", the single tank body 40 of the water storage tank 10 and its outside The dew-proofing material 42 is provided with a large tank part 44 and a small tank part 46 on the left and right sides with respect to the vertical plane A1, and is divided horizontally into the large tank part 44 and the small tank part 46 by the vertical plane A1. has been done.
That is, as shown in FIG. 6, the large tank section 44 is arranged on the left side of the vertical plane A1 when the tank main body 40 and the dew protection material 42 are viewed from the back side, and the small tank section 46 is arranged on the left side of the vertical plane A1 when the tank main body 40 and the dew protection material 42 are viewed from the back side. When the material 42 is viewed from the back side, it is arranged on the right side of the vertical plane A1, and the volume V1 of the large tank part 44 is set larger than the volume V2 of the small tank part 46 (V1>V2).
As a result, the water storage tank 10 has an asymmetrical shape (approximately a C-shape or a U-shape in plan view) due to the large tank portion 44 and the small tank portion 46.

Further, as shown in FIGS. 1, 3 and 4, the drain trap pipe 2b of the toilet main body 2 runs from an inlet part 2g connected below the bowl part 2a to an outlet part 2h rearward of the bowl part 2a. It extends in the front-back direction.
As shown in FIGS. 3 to 6, the large tank section 44 of the water storage tank 10 includes a rear large tank section 44a disposed on the rear side of the drain trap pipe 2b, and a rear large tank section 44a located at the front from the rear large tank section 44a. A front large tank part 44b extending downward from the left and right sides of the drain trap pipe 2b (on the right side when viewed from the front side of the toilet main body 2), and a lower large tank part extending downward from the rear large tank part 44a. 44c.
Next, as shown in FIGS. 3 to 6, the small tank section 46 of the water storage tank 10 includes a rear small tank section 46a disposed on the rear side of the drain trap pipe 2b, and a rear small tank section 46a that is connected to the rear small tank section 46a. It is provided with a front side small tank part 46b extending forward and disposed on the other left and right side of the drain trap pipe 2b (on the left side when viewed from the front side of the toilet 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 left and right sides and from the rear side.

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

Further, as shown in FIGS. 4 to 6, when the large tank section 44 and the small tank section 46 are installed in the large tank accommodating section S1 and the small tank accommodating section S2, respectively, the bottom surface of the large tank section 44 (the lowest position P1 of the bottom surface 44a 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 small tank portion 46a and the front small tank portion 46b). It is located below.
Furthermore, as shown in FIGS. 4 to 6, when the large tank section 44 and the small tank section 46 are installed in the large tank accommodating section S1 and the small tank accommodating section S2, respectively, the upper surface of the large tank section 44 The highest position (the highest position P3 of the upper surface 44e of the front large tank part 44b) is located above the highest position P4 of the upper surface 46d of the rear small tank part 46a and the front small tank part 46b of the small tank part 46. Moreover, it is located below the upper surface 2i of the rim portion 2c of the toilet main body 2.
Further, as shown in FIGS. 3 to 6, position P5 of the front end 44f of the front large tank portion 44b is located further forward than position P6 of the front end 46e of the front small tank portion 46b.

Incidentally, as shown in FIGS. 2 and 4, the suction pipe 38 is provided across both the rear large tank section 44a and the lower large tank section 44c of the large tank section 44 of the tank body 40. The upstream end 36a of the water pipe 36 extending upstream (laterally) from the pump 30 is watertightly connected to the downstream end 38a of the suction pipe 38, which is a part of the large tank section 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 flow pipe 36 extending downstream (upward) from the pump 30. ) is connected to the inlet 2e of the rim water conduit 2d on the other left and right side with respect to the vertical plane A1 of the toilet main body 2 (left side of the vertical plane A1 when viewing the toilet main body 2 from the front side).

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

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

Next, details of the water receiving housing 24 (small tank) of the connection unit 20 in the tank device 4 of the flush toilet 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 8.
FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3, showing a flush toilet according to the first embodiment of the present invention in which a private parts cleaning device is provided on the upper surface on the rear side of the toilet main body. Further, FIG. 8 is a partially enlarged side sectional view of the water receptacle housing portion of the flush toilet according to the first embodiment of the present invention shown in FIG.
First, as shown in FIG. 4, FIG. 7, and FIG. 8, the flush toilet 1 according to the present embodiment includes a private part cleaning device 48 that enables the user's private parts to be cleaned. This private part cleaning device 48 is arranged on the upper surface 2i of the toilet main body 2 on the rear side of the bowl portion 2a.

Next, as shown in FIG. 3, FIG. 4, FIG. 7, and FIG. ing.
Specifically, the water receiver housing 24 includes a cylindrical housing part (housing main body part 50) provided at the upper part of the water storage tank 10 (water storage tank main body), and is provided so as to cover the upper part of this housing main body part 50. The housing includes a top lid (cover portion 52), and a ventilation path 54 and a ventilation hole 56 (details will be described later) that allow ventilation between the inside and outside of the housing main body portion 50.
First, as shown in FIGS. 3, 4, 7, and 8, in the housing main body portion 50 of the water receiver housing 24, a water supply pipe 6 is connected. A water supply nozzle 58 (water supply section) extending to the inside of the housing main body section 50 is provided on the downstream side of the water supply pipe 6.
Further, a water supply port 58a (water supply portion) directed downward is provided at the tip of the water supply nozzle 58.
Further, an overflow pipe 26 is connected to an overflow port 24b below the side wall 50a of the housing body 50 via a check valve 28.
Here, the lower opening 24a provided on the bottom surface of the housing main body 50 and the upper opening 10a of the water storage tank 10 (water storage tank main body) communicate with each other through a communication hole 60 extending in the vertical direction, and the water supply port Cleaning water W1 discharged from 58a passes through the communication hole 60 from the lower opening 24a of the housing main body 50, and is supplied into the water storage tank 10 from the upper opening 10a of the water storage tank 10.

Next, as shown in FIG. 8, the cover part 52 of the water receiver housing 24 forms a top surface 52a above the housing main body part 50. A condensation water guiding portion G is provided on the top surface 52a of the cover portion 52 to guide condensed water W2 attached by water vapor generated within the housing body portion 50 into the housing body portion 50 other than the air passage 54.
Further, the condensation water guiding portion G includes a substantially conical central protrusion 62 provided at the center of the top surface 52a of the cover portion 52 and protruding downward.
Further, the condensation water guide portion G includes an outer inclined surface 64 that slopes downward from the upper inner side to the lower outer side along the top surface 52a from the upper edge of the central protrusion 62.
Further, the condensation water guide portion G includes an outer protrusion 66 that projects downward from the outer edge of the outer inclined surface 64.
Further, the condensation water guide portion G includes a vertical wall portion (outer peripheral wall 68) extending downward from the outer edge portion outside the outer protrusion 66.

As a result, as shown in FIG. 8, the condensed water W2 adhering to the surface of the central protrusion 62 on the top surface 52a of the cover part 52 is removed from the inner inclined surface that slopes from the upper edge of the protrusion 62 toward the central lower end. 62a, and then fall into a region (inner region R2) inside the region of the ventilation path 54 (ventilation path region R1) in the housing main body portion 50.
Further, as shown in FIG. 8, the condensed water W2 adhering to the outer inclined surface 64 of the top surface 52a of the cover part 52 is guided from the upper inner side toward the lower outer side along the outer inclined surface 64. , and fall into the inner region R2 within the housing main body portion 50 along the outer protrusion 66.
Furthermore, as shown in FIG. 8, condensed water W2 adhering to the vicinity of the inner surface 68b of the outer peripheral wall 68 on the outer inclined surface 64 of the top surface 52a of the cover part 52 is also removed from the housing along the inner surface 68b of the outer peripheral wall 68. It is designed to fall into an inner region R2 within the main body portion 50.

Next, as shown in FIGS. 3 and 8, a rear outer peripheral wall 70 extending upward is formed at the upper end of the rear vertical wall portion (outer peripheral wall 68) of the cover portion 52. As shown in FIGS.
This rear side outer peripheral wall 70 extends above the top surface 52a with a predetermined width L1 in the circumferential direction, has an upper end 70a located above the upper end 50b of the housing main body 50, and is bent outward. are doing.
Furthermore, as shown in FIG. 8, the cover part 52 is arranged so that the outer surfaces 68a, 70b of its side walls (outer peripheral walls 68, 70) are located inside the inner surface 50c of the side wall 50a of the housing main body part 50. It is attached to the main body part 50 from above.
As a result, a ventilation passage 54 is formed between the outer surface 70b of the rear outer peripheral wall 70 extending upward from the rear outer peripheral wall 68 of the cover section 52 and the inner surface of the side wall 50a of the housing main body 50 facing the outside. It is beginning to form.
That is, each of the vertical wall portion (rear side outer circumferential wall 70) on the rear end side of the cover portion 52 and the side wall 50a of the housing body portion 50 opposing the rear end of the cover portion 52 is connected to the condensation water guide portion G of the top surface 52a of the cover portion 52. In the outer region, the wall surface forms a ventilation passage 54 extending in the vertical direction.
In addition, in this embodiment, a form will be described in which the cover part 52 is removably provided as a separate member from the housing main body part 50, but the present invention is not limited to such a form, and the cover part is provided above the housing main body part. It may also be integrally formed with.

Next, as shown in FIG. 8, the lower surface (top surface) of the upper end portion 70a of the vertical wall portion (rear side outer circumferential wall 70) of the cover portion 52 and the upper end surface 50b of the housing main body portion 50 facing below the upper end portion 70a. A vent hole 56 is formed between them.
Furthermore, since the housing main body 50 and the cover 52 are arranged on the rear side of the private parts cleaning device 48, the housing main body 50 and the cover part It is arranged on the rear side of the central part C1 of 52 in the front-rear direction.
As a result, the ventilation passage 54 extends from the outer region R1 in the housing main body 50 to the lower surface (top surface) of the upper end 70a of the rear outer circumferential wall 70 of the cover 52, and then the ventilation hole 56 extends toward the rear side. It is designed to be directed.

Next, the operation of the flush toilet 1 according to the first embodiment of the present invention described above will be explained with reference to FIGS. 1 to 8.
According to the flush toilet 1 according to the present embodiment, for example, when water vapor is generated by the flush water in the water storage tank 10 and rises into the water receiver housing 24, or within the housing main body part 50 of the water receiver housing 24 itself, When water vapor is generated by the cleaning water and rises, such rising water vapor adheres to the top surface 52a of the cover portion 52 of the water receiver housing 24, and is then cooled and becomes condensed water W2.
Then, such condensed water W2 is transferred to an area inside the housing main body 50 other than the air passage 54 (inside the housing main body 50 is guided to a region R1) inside the region R1 of the ventilation passage 54 in .
Therefore, it is possible to suppress the condensed water W2 adhering to the condensed water guide portion G from leaking out of the housing main body portion 50 from the ventilation path 54.
Therefore, the local cleaning device 48 disposed adjacent to the tank device 4 and the peripheral devices and electrical components provided near the outside of the water receiver housing 24 are exposed to the moisture of the condensed water leaking from the water receiver housing 24. This can reduce the risk of failure due to
As a result, leakage of condensed water from the water storage tank 10 and water receiver housing 24 side can be effectively suppressed, and the reliability of related equipment and peripheral equipment of the tank device 4 can be ensured.

Next, according to the flush toilet 1 according to the present embodiment, even if the dew condensation water W2 guided into the housing main body part 50 by the dew condensation water guide part G infiltrates into the ventilation passage 54, the dew condensation water W2 is returned into the housing body 50 along the outer surface of the vertical wall portion (outer peripheral wall 68) of the cover portion 52 or the inner surface of the side wall 50a of the housing body 50 behind it.
Therefore, it is possible to effectively suppress the condensed water W2 guided into the housing main body part 50 by the condensed water guide part G from leaking from the vent 56 via the ventilation path 54.

Next, according to the flush toilet 1 according to the present embodiment, the condensed water W2 adhering to the top surface 52a of the cover section 52 of the water receiver housing 24 is removed from the inside of the top surface a of the cover section 52 by the condensation water guide section G. It is guided outward to an inner region R2 in the housing main body 50 other than the region R1 of the ventilation passage 54.
At this time, in the unlikely event that the condensed water W2 guided from the inside to the outside of the top surface 52a of the cover part 52 is exposed to the vertical wall part (forming the outer peripheral wall 68 and the ventilation passage 54) extending downward from the outside of the dew condensation water guiding part G2, Even if the condensed water W2 adheres to the rear outer circumferential wall 70, etc., the condensed water W2 flows down the outer circumferential wall 68, the inner surface 68b of the rear outer circumferential wall 70, etc., and is surely returned to the inner region R2 in the housing body 50. It will be.
Therefore, leakage of the condensed water W2 from the vent 56 via the vent passage 54 can be more effectively suppressed.

Next, according to the flush toilet 1 according to the present embodiment, the condensation water guide portion G extends from the upper edge of the central protrusion 62 along the top surface 52a to the outer inclined surface 64 that slopes downward from the upper inner side to the lower outer side. We are prepared.
As a result, the condensed water W2 adhering to the top surface 52a of the cover section 52 of the water receiver housing 24 is transferred from the inside of the top surface 52a of the cover section 52 to the outside by the simple structure of the outer inclined surface 64 of the condensation water guide section G. After being guided toward the housing body 50, it can be reliably guided into the housing main body portion 50.

Next, according to the flush toilet 1 according to the present embodiment, the cover part 52 is placed in the upper part of the housing body part 50 so that its side wall (outer peripheral wall 68) is located inside the side wall 50a of the housing body part 50. is attached to.
As a result, the condensed water W2 that adheres to the top surface 52a of the cover section 52 of the water receiver housing 24 and is guided from the inside to the outside of the top surface 53a of the cover section 52 by the condensation water guide section G is transferred to the cover section 52. can flow down along the side wall (outer peripheral wall 68).
Therefore, the dew condensation water W2 can be reliably guided into the region R2 inside the side wall 50a of the housing main body portion 50.

Next, according to the flush toilet 1 according to the present embodiment, the water receiver housing 24 disposed on the rear side of the private parts cleaning device 48 is arranged such that the air passage 54 is distal to the private parts cleaning device 48. It is arranged on the rear side of the central portion C1 of the housing 24 in the front-rear direction.
As a result, even if condensed water W2 in the housing main body 50 leaks from the air passage 54 to the outside of the water receiver housing 24, the air passage 54 will be disposed at a position distal to the local cleaning device 48. Therefore, the risk of the private part cleaning device 48 being exposed to the moisture of the condensed water leaking from the water receiver housing 24 can be reduced.

Next, according to the flush toilet 1 according to the present embodiment, the air passage 54 extends from the outer region R1 in the housing main body 50 to the lower surface (top surface) of the upper end 70a of the rear outer peripheral wall 70 of the cover portion 52. After being extended, the vent hole 56 is formed to face toward the rear side.
This makes it difficult for the condensed water W2 in the housing main body 50 to leak out from the vent 56 via the vent passage 54.
In addition, in addition to the ventilation path 54 being disposed distally with respect to the private part cleaning device 48, the ventilation port 56 is directed to the rear side, so that condensed water W2 inside the housing main body 50 can be prevented by any chance. To effectively reduce the risk of a local cleaning device 48 being exposed to the moisture of condensed water W2 leaking from a vent 56 of a water receiver housing 24 even if water leaks from the vent 56 to the outside of the water receiver housing 24. I can do it.

Next, according to the flush toilet 1 according to the present embodiment, the water storage tank 10 is arranged to surround the upper part of the drain trap pipe 2b from both left and right sides and from the rear side.
Thereby, the limited space behind the toilet main body 2 can be effectively utilized to arrange the water storage tank 10.
Regarding the water storage tank 10, the rear large tank 44a, the front large tank 44b, and the lower large tank 44c of the large tank main body (large tank 44), and the small tank main body (small tank 46) The rear small tank part 46a and the front small tank part 46b each allow a left-right asymmetrical shape, and the water receiving housing 24 is provided above the front large tank part 44b. Thereby, the space occupied by the water receiver housing 24 can be suppressed.
Therefore, the limited space behind the toilet main body 2 can be effectively utilized to ensure a larger tank capacity of the water storage tank 10.
Furthermore, the entire tank device 4 and the entire flush toilet 1 can be made low-profile and compact.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS. 9 and 10.
FIG. 9 is a perspective view of the water receiving housing of the flush toilet according to the second embodiment of the present invention, viewed obliquely from the rear and above. Further, FIG. 10 is a sectional view taken along the line XX in FIG. 9.
Here, in the flush toilet 100 according to the second embodiment of the present invention shown in FIGS. 9 and 10, the same parts as the flush toilet 1 according to the first embodiment of the present invention described above are given the same reference numerals, Descriptions of these will be omitted.
First, as shown in FIGS. 9 and 10, in the flush toilet 100 according to the second embodiment of the present invention, the cover portion 152 is attached to the side walls (front vertical wall portion 168 and rear vertical wall portion 170) of the flush toilet 100 according to the second embodiment of the present invention. It is attached to the housing main body 150 from above so that the outer surface is located inside the inner surface of the side wall 150a of the housing main body 150.
Further, on the inner surfaces of each of the front vertical wall section 168 and the rear vertical wall section 170, condensed water adhering to these is allowed to flow down along the inner surfaces and fall into the housing body section 150 other than the ventilation passage 154. It functions as a condensation water guiding section G.

Next, as shown in FIGS. 9 and 10, in the flush toilet 100 according to the present embodiment, the outer surface of the rear vertical wall section 170 of the cover section 152 and the side wall 150a of the housing main body section 150 opposite to the outer surface of the rear vertical wall section 170 of the cover section 152. A ventilation path 154 is formed between the inner surface and the inner surface.
That is, each of the outer surface 170b of the rear vertical wall section 170 of the cover section 152 and the inner surface 150c of the side wall 150a of the housing main body section 150 facing the rear thereof is located in the region R102 on the rear side of the region R101 in the housing main body section 150. The wall surface forms a ventilation passage 154 extending in the vertical direction.
Further, the vent hole 156 of the water receiving housing 124 is formed by cutting out the rear upper edge of the housing main body portion 150.
Further, the ventilation passage 154 extends from the outer region R101 in the housing main body 150 to the upper end 170a (top surface 152a) of the rear vertical wall 170 of the cover 152, and then the rear ventilation port 56 is opened for cleaning the private parts. It is formed to be directed distally (rearwardly) with respect to the device 48 .

Next, as shown in FIGS. 9 and 10, in the flush toilet 100 according to the present embodiment, the upper surface (uppermost surface 152b) of the cover section 152 is connected to the upper edge of the housing body section 150 (upper end surface 150b of the side wall 150a). ) is a horizontal plane that is almost flush with the surface.
Further, the rear vertical wall portion 170 of the cover portion 152 extends downward from the rear side of the top surface 152a in the circumferential direction with a predetermined width L101, and also functions as a condensation water guide portion G. .
Furthermore, as shown in FIGS. 9 and 10, an inclined surface 164 is provided as a condensation water guiding portion G on the top surface 152a below the top surface 152b of the cover portion 152. This inclined surface 164 is inclined downwardly toward the outside from a midway position P101 between the center portion C101 of the cover portion 152 and the front end 152c.

According to the flush toilet 100 according to the second embodiment of the present invention described above, the condensed water W2 adhering to the top surface 152a of the cover section 152 of the water receiver housing 124 is transferred to the top surface 152a of the cover section 152 by the condensation water guide section G. It is guided from the upper inner side to the lower outer side along the inclined surface 164 of.
Then, this condensed water W2 flows down along the inner surface 168b of the front vertical wall portion 168 of the cover portion 152, and falls into the inner region R102 of the housing body portion 150.
Furthermore, condensed water W2 adhering to the outer surface 170b and inner surface 170c of the rear vertical wall section 170 of the top surface 152a of the cover section 152 flows down along the inner surface of the rear vertical wall section 170, and flows down into the housing. It falls into the inner region R102 of the main body part 150.
Therefore, it is possible to suppress the condensed water W2 from leaking from the vent 156 via the vent passage 154.

Further, according to the flush toilet 100 according to the present embodiment, the vent 156 is formed by cutting out the rear upper edge 150b of the housing main body 150, and the uppermost surface 152b of the cover 152 It is a horizontal surface that is substantially flush with the upper end surface 150b.
Thereby, the height dimension of the water receiving housing 124 can be suppressed, so that the entire tank device 4 and the entire flush toilet 1 can be made low-profile and compact.

Next, a flush toilet according to a third embodiment of the present invention will be described with reference to FIGS. 11 and 12.
FIG. 11 is a perspective view of a water receiver housing of a flush toilet according to a third embodiment of the present invention, viewed diagonally from the front and above. Further, FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. 11.
Here, in the flush toilet 200 according to the third embodiment of the present invention shown in FIGS. 11 and 12, the same parts as the flush toilet 1 according to the first embodiment of the present invention described above are given the same reference numerals, Descriptions of these will be omitted.
As shown in FIGS. 11 and 12, in the flush toilet 200 according to the third embodiment of the present invention, the rear vertical wall portion 270 of the cover portion 252 forming the vent 256 is connected to the housing body portion 50 and the cover portion. It is provided on the rear side of the central portion C1 of 52 in the front-rear direction.
Further, the rear vertical wall portion 270 projects upward from the upper wall (the top surface 252a and the top surface 252b) of the cover portion 252, and a ventilation passage 254 that projects upward from the cover portion 252 is formed.
Furthermore, the upper end of the rear side vertical wall portion 270 is formed so as to be directed toward the front side, and a vent hole 256 that opens toward the front side is formed.
In this way, the vent 256 itself is arranged on the rear side of the central part C1 of the housing main body part 50 and the cover part 52 in the front-rear direction, and is arranged so as to be spaced apart from the private part cleaning device 48 on the distal side. If so, the vent 256 is not limited to being oriented toward the rear side, but may be oriented toward the front side.

1 Flush toilet according to the first embodiment of the present invention 2 Toilet main body 2a Bowl portion 2b Drainage trap pipe (drainage trap portion)
2c Rim part 2d Rim conduit 2e Inlet of rim conduit 2f Rim spout 2g Inlet part of drain trap pipe 2h Outlet part of drain trap pipe 2i Upper surface of rim part 4 Tank device 6 Water supply pipe (water supply part)
8 Water discharge pipe 8a Outlet part of water discharge pipe 10 Water storage tank (water storage tank body)
10a Upper opening 10b Outside upper surface of water storage tank 12 Water stop valve 14 Valve unit (water supply part)
16 Constant flow valve 17 Diaphragm valve 18 Solenoid valve 20 Connection unit 22 Tank unit 24 Water receiver housing (small tank)
24a Lower opening 24b Overflow port 26 Overflow pipe 28 Check valve 30 Pump 32 Float switch 32a Detection section 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 surface of tank body 42 Dew-proof material 42a Outside upper surface of dew-proof material 44 Large tank part (large dunk main body part)
44a Rear large tank part (rear large tank body part)
44b Front large tank part (front large tank body part)
44c Lower side large tank part (lower side large tank body part)
44d Bottom surface of the lower large tank section 44e Top surface of the front large tank section 44f Front end of the front large tank section 44g Side wall surface of the large tank section 46 Small tank section (small tank main body)
46a Rear side small tank part (rear side small tank body part)
46b Front small tank part (front small tank body part)
46c Bottom surface of rear small tank section and front small tank section 46d Top surface of rear small tank section 46e Front end of front small tank section 46f Side wall surface of small tank section 48 Private part cleaning device 48a Functional part of private part cleaning device 50 Housing Main body (housing)
50a Side wall of the housing body 50b Upper end, upper end surface of the housing body 50c Inner surface of the side wall of the housing body 52 Cover portion of the water receiver housing 52a Top surface of the cover portion 54 Air passage 56 Vent hole 58 Water supply nozzle (water supply portion)
58a Water supply port (water supply part)
60 Communication hole 62 Central projection (condensation water guide part)
62a Inner inclined surface 64 Outer inclined surface (condensation water guide section, inclined surface)
66 Outer protrusion (condensation water guide part)
68 Outer peripheral wall (vertical wall of cover section, side wall)
68a Outer surface of outer peripheral wall 68b Inner surface of outer peripheral wall 70 Rear outer peripheral wall of cover part (vertical wall part)
70a Upper end portion of the rear outer circumferential wall 70b Outer surface of the rear outer circumferential wall 100 Flush toilet according to the second embodiment of the present invention 124 Water receiver housing (small tank)
150 Housing body part 150a Side wall of housing body part 150b Upper end, upper end surface, rear upper edge of housing body part 150c Inner surface of side wall of housing body part 152 Cover part 152a Top surface of cover part 152b Top surface of cover part (cover part top surface)
152c Front end of cover part 154 Air passage 156 Vent hole 164 Slanted surface (condensation water guide part)
168 Front vertical wall part of cover part (condensation water guide part, vertical wall part of cover part, side wall)
168a Outer surface of the front vertical wall 168b Inner surface of the front vertical wall 170 Rear vertical wall of the cover (condensation water guide section, vertical wall)
170a Upper end of the rear vertical wall 170b Outer surface of the rear vertical wall 170c Inner surface of the rear vertical wall 200 Flush toilet according to the third embodiment of the present invention 224 Water receiver housing (small tank)
250 Housing body portion 252 Cover portion 252a Top surface of cover portion 252b Top surface of cover portion 254 Air passage 256 Ventilation port 270 Rear vertical wall portion (vertical wall portion) of cover portion
A1 Vertical plane that divides the water storage tank into two in the left and right center B Collision area plane (collision part)
C Controller C1 Center part of the housing main body and cover part in the longitudinal direction C101 Center part of the cover part G Condensation water guide part L1 Circumferential width of the vent P1 Lowest position of the bottom of the large tank part (lower large tank part) P2 Lowest position of the bottom of the small tank part (rear small tank part and front small tank part) P3 Highest position of the top of the large tank part (front large tank part) P4 Top face of the small tank part (rear small tank part) P5 Front end position of the front large tank part P6 Front end position of the front small tank part P101 Midway position between the center part and front end on the top surface of the cover part R1 Ventilation path area, outer area inside the main body part R2 Housing Inner area inside the main body R101 Area inside the housing main body R102 Rear side area of the area inside the housing main body S1 Large tank accommodating part of the toilet main body S2 Small tank accommodating part of the toilet main body V1 Volume of the large tank part V2 Volume of the small tank part W1 Cleaning water W2 Condensation water WL Water level in the water storage tank, water surface

Claims (12)

A flush toilet that is flushed with flush water and discharges waste,
A toilet body comprising a bowl portion for receiving waste, a rim portion formed on the upper edge of the bowl portion, and a drain trap portion for discharging waste from the bowl portion;
a tank device provided at the rear of the toilet main body and supplying flush water to the toilet main body;
a private area cleaning device provided on the upper surface of the rear side of the toilet main body and located adjacent to the tank device;
The tank device includes a water supply section that supplies cleaning water supplied from a water supply source;
a water storage tank body that is provided behind the toilet body and above the floor surface and stores flush water to be supplied to the toilet body;
A small tank is provided in communication with the upper part of the water storage tank body and to which the water supply pipe of the water supply section is connected,
The small tank includes a cylindrical housing part provided on the upper part of the water storage tank body, a cover part provided to cover the upper part of the housing part, and at least one side of the housing part or the cover part. a ventilation path including a ventilation hole provided to ventilate the inside and outside of the housing part;
A flush toilet characterized in that a top surface of the cover section is provided with a condensation water guide section that guides condensed water caused by water vapor generated within the housing section into the housing section other than the air passage. 2. The flush toilet according to claim 1, wherein the dew condensation water guide section is configured to guide dew condensation water to a region inside the housing section inside the air passage in plan view. 3. The small tank further comprises a vertical wall portion extending upwardly and/or downwardly from the outside of the condensation water guide portion on the top surface of the cover portion to form the ventilation path. Flush toilet. The vertical wall portion extends at least downwardly from the outside of the condensation water guide portion on the top surface of the cover portion to form the ventilation path;
4. The flush toilet according to claim 3, wherein the condensation water guide section is configured to guide condensation water from the inside of the top surface of the cover section outward to a region within the housing section other than the air passage. The flush toilet according to any one of claims 1 to 4, wherein the condensation water guide portion includes an inclined surface that slopes downward from the inside to the outside of the top surface of the cover portion. 6. The flush toilet according to claim 4, wherein the cover part is attached to the upper part of the housing part so that the side wall thereof is located inside the side wall of the housing part. The small tank is placed on the rear side of the private area cleaning device, and the ventilation path is placed on the rear side of the center of the small tank in the front-rear direction so as to be distal to the private area cleaning device. The flush toilet according to any one of claims 1 to 6. 8. The flush toilet according to claim 7, wherein the air passage is formed so that the air passage extends from an outer region within the housing part to a top surface of the cover part, and then the air vent is directed to the rear side. 6. The vent hole is formed by cutting out the rear upper edge of the housing portion, and the cover portion has an upper surface that is a horizontal surface that is substantially flush with the upper edge of the housing portion. 9. The flush toilet according to any one of items 8 to 8. The drain trap portion extends in the front-rear direction from an inlet portion connected to the bowl portion toward an outlet portion rearward than the bowl portion in plan view,
The flush toilet according to any one of claims 1 to 9, wherein the water storage tank body is arranged to surround the upper part of the drain trap part from both left and right sides and from the rear side. The water storage tank body has a large tank body which is the side with a larger volume when divided into two at the left and right center, and a small tank body which is the side with a smaller volume when the water storage tank body is divided into two at the left and right center. It has an asymmetrical shape with a
The flush toilet according to any one of claims 1 to 10, wherein the small tank is provided above the large tank main body. The large tank main body includes a rear large tank main body that is arranged on the rear side of the drain trap, and a rear large tank main body that extends forward from the rear large tank main body and is arranged on one side of the left and right sides of the drain trap. It includes a front large tank main body and a lower large tank main body extending downward from the rear large tank main body,
The small tank main body includes a rear small tank main body that is arranged on the rear side of the drain trap, and a rear small tank main body that extends forward from the rear small tank main body and is arranged on the other left and right side of the drain trap. It is equipped with a small tank main body on the front side,
The front end of the front large tank body is located further forward than the front end of the front small tank body,
The bottom surface of the lower large tank main body is located below the respective bottom surfaces of the rear small tank main body and the front small tank main body,
12. The flush toilet according to claim 11, wherein the small tank is provided above the front large tank main body.

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