Flush toilet

Abstract

The purpose of the present invention is to provide a flush toilet capable of accommodating a water tank device in a toilet body while ensuring the capacity of the water tank device. The present invention is a wall-mounted flush toilet comprising: a toilet main body provided with a bowl part, a drain bend line, and a skirt part that surrounds the bowl part and the drain bend line from the outside; a water tank device which is disposed in a space S below the bowl part in the toilet main body and which stores washing water supplied to the toilet main body; and a functional device for supplying washing water to the toilet main body, the water tank device being provided with: a first water tank part disposed closer to one side than the center in the left-right direction of the toilet main body in a plan view, and a second water tank part disposed closer to the other side than the center in the left-right direction of the toilet main body in a plan view; and a second tank section disposed on the other side of the center of the toilet body in the left-right direction, the length of the second tank section in the front-rear direction being half or less of the length of the first tank section in the front-rear direction.

Description

Technical Field

[0001] This invention relates to a flushing toilet, and more particularly to a wall-mounted flushing toilet. Background Technology

[0002] Conventionally, as described in Patent Documents 1-3, wall-mounted flushing toilets fixed to the wall have been known to house a water tank containing flushing water supplied to the toilet body within the space below the basin. Such flushing toilets include, within the toilet body, a pump device for supplying flushing water from the water tank to the toilet body, and a control device for driving the pump device, among other functional devices.

[0003] Patent documents Patent Document 1: Japanese Patent Application Publication No. 2024-031498 Patent Document 2: Japanese Patent Application Publication No. 2024-031499 Patent Document 3: Chinese Utility Model No. 219825498 Specification Summary of the Invention

[0004] However, in wall-mounted flush toilets such as those in Patent Documents 1-3, a low-positioned water tank is designed to shorten the vertical height of the toilet body. However, if wall-mounted flush toilets like those in Patent Documents 1-3 are designed with a low-positioned water tank, the space inside the toilet body becomes narrower. This results in interference between the water tank and the functional devices, and the water tank cannot be accommodated within the toilet body.

[0005] Therefore, the present invention was made to solve the above-mentioned problems, and its purpose is to provide a flush toilet that can accommodate the water tank device within the toilet body while ensuring the capacity of the water tank device.

[0006] To address the aforementioned problems, the present invention provides a wall-mounted flush toilet, comprising: a toilet body having a basin for receiving waste, a drain bend pipe connected below the basin for discharging waste, and a skirt surrounding the basin and the drain bend pipe from the outside; a water tank device disposed in the space below the basin within the toilet body for storing flushing water supplied to the toilet body; and a functional device for supplying flushing water to the toilet body. The water tank device, when viewed from above, comprises: a first water tank portion disposed closer to one side than the center of the toilet body in the left-right direction; and a second water tank portion disposed closer to the other side than the center of the toilet body in the left-right direction, wherein the front-back length of the second water tank portion is set to be less than half the front-back length of the first water tank portion. In this invention, when viewed from above, the water tank assembly includes: a first water tank portion positioned closer to one side than the center of the toilet body in the left-right direction; and a second water tank portion positioned closer to the other side than the center of the toilet body in the left-right direction. The front-back length of the second water tank portion is set to be less than half the front-back length of the first water tank portion. Therefore, a functional device can be accommodated in the rear region of the second water tank portion, and the water tank assembly and the functional device can be compactly accommodated within the space of the toilet body. Thus, while ensuring the capacity of the water tank assembly, it is possible to accommodate the water tank assembly within the toilet body.

[0007] In this invention, it is preferable that the water tank device has a connecting part that connects the first water tank part and the second water tank part, and when viewed from above, the connecting part is disposed at the center of the basin part in the front-back direction. In this invention, the water tank device has a connecting part that connects the first water tank part and the second water tank part. When viewed from above, the connecting part is located in the center of the basin in the front-back direction. Therefore, compared with when the connecting part is located in front of the basin, the shape of the skirt in front of the toilet body can be freely designed.

[0008] In addition, the present invention preferably includes: a spray nozzle disposed below the basin portion to discharge cleaning water into the inlet of the drain bend pipe; and a spray guide channel to supply cleaning water to the spray nozzle, wherein the upper wall of the connecting portion is formed in a concave shape and the spray guide channel is disposed on the concave upper wall. In this invention, since it includes: a spray nozzle disposed below the basin to discharge cleaning water into the inlet of the drain bend pipe; and a spray guide path to supply cleaning water to the spray nozzle, and the upper wall of the connecting part is formed in a concave shape, and the spray guide path is disposed on the upper wall of the concave shape, interference between the water tank device and the spray guide path can be avoided.

[0009] In this invention, it is preferable that the upper wall of the second water tank is set to be lower than the upper wall of the first water tank. In this invention, since the upper wall of the second water tank is set to be lower than the upper wall of the first water tank, the space for air retention in the second water tank can be reduced, and the water tank device can be made more compact.

[0010] Furthermore, in this invention, it is preferable that the water level of the first water tank is set to be higher than the water level of the second water tank. In this invention, since the water level of the first water tank is set to be higher than that of the second water tank, a larger amount of cleaning water can be stored even if the water tank assembly is made compact.

[0011] In this invention, the preferred functional device is a pump device that pressurizes and delivers the cleaning water stored in the water tank to the toilet body. In this invention, since the functional device is a pump that pressurizes and delivers the cleaning water stored in the water tank to the toilet body, the water tank and the pump can be compactly housed within the space of the toilet body.

[0012] In addition, the present invention preferably includes: a jet nozzle disposed below the basin to discharge cleaning water into the inlet of the drain bend; a jet guide passage to supply cleaning water to the jet nozzle; and a jet water supply pipe connecting the jet guide passage and the pump device, wherein the pump device and the jet water supply pipe are housed in the space behind the second water tank in the toilet body. In this invention, which is configured in this way, since it includes: a jet nozzle disposed below the basin to discharge cleaning water into the inlet of the drain bend; a jet guide passage to supply cleaning water to the jet nozzle; and a jet water supply pipe connecting the jet guide passage and the pump device, and the pump device and the jet water supply pipe are housed in the space behind the second water tank in the toilet body, the water tank device, the pump device and the jet water supply pipe can be compactly housed in the space of the toilet body.

[0013] In this invention, the following is preferred: an inner edge water outlet disposed on the inner edge of the basin and dispensing cleaning water; an inner edge water guide passage supplying cleaning water to the inner edge water outlet; and an inner edge water supply pipe connecting the inner edge water guide passage and the pump device, wherein the pump device and the inner edge water supply pipe are housed in the space behind the second water tank portion of the toilet body. In this invention, since it includes: an inner edge spout, disposed on the inner edge of the basin and spouting cleaning water; an inner edge water guide, supplying cleaning water to the inner edge spout; and an inner edge water supply pipe, connecting the inner edge water guide and the pump device, and the pump device and the inner edge water supply pipe are housed in the space behind the second water tank in the toilet body, the water tank device, the pump device and the inner edge water supply pipe can be compactly housed in the space of the toilet body.

[0014] In addition, in this invention, the pump device is preferably located near the second water tank section. In this invention, since the pump device is located near the second water tank, the water tank device and the pump device can be compactly housed within the space of the toilet body.

[0015] In this invention, it is preferable that the second water tank section is provided with an outlet pipe for the cleaning water stored in the water tank device to flow out, and the outlet of the outlet pipe is configured to be opposite to the inlet of the pump device. In this invention, since the second water tank section is provided with an outlet pipe for the cleaning water stored in the water tank device to flow out, and the outlet of the outlet pipe is configured to face the inlet of the pump device, the water tank device and the pump device can be compactly connected.

[0016] In addition, in this invention, it is preferable that the inlet of the outlet pipe of the second water tank is opened downwards. In this invention, since the inlet of the outlet pipe of the second water tank is open downwards, the stagnant water level of the cleaning water in the water tank device can be reduced, and the water tank device can be made more compact.

[0017] In this invention, the water tank device preferably includes: a cross-sectional area reduction section, wherein the horizontal cross-sectional area of ​​the water tank device is reduced upward; and a float switch for detecting the water level of the cleaning water stored in the water tank device, wherein the float switch is disposed in the cross-sectional area reduction section. In this invention, the water tank device includes: a cross-sectional area reduction section, in which the horizontal cross-sectional area of ​​the water tank device is reduced upwards; and a float switch, which detects the water level of the cleaning water stored in the water tank device. Since the float switch is disposed in the cross-sectional area reduction section, the rising speed of the water level can be increased within the cross-sectional area reduction section to activate the float switch, thereby improving the accuracy of the float switch in detecting the water level.

[0018] According to the present invention, the flush toilet can accommodate the water tank device within the toilet body while ensuring the capacity of the water tank device. Attached Figure Description

[0019] Figure 1 This is a perspective view of a flush toilet according to the first embodiment of the present invention. Figure 2 This is a top view of the toilet according to the first embodiment of the present invention with the sanitary cleaning device removed. Figure 3 It is along Figure 2 Side sectional view observed along line III-III. Figure 4A This is a perspective view of the functional device of the flushing toilet according to the first embodiment of the present invention, viewed from a slightly above left side. Figure 4B This is a perspective view of the functional device of the flushing toilet according to the first embodiment of the present invention, viewed from a slightly above right side. Figure 5 This is a structural diagram showing the water supply path through which the flushing water of the toilet according to the first embodiment of the present invention flows. Figure 6A This is a perspective view of the water tank device of the flush toilet according to the first embodiment of the present invention, viewed from a slightly above left side. Figure 6B This is a perspective view of the water tank device of the flush toilet according to the first embodiment of the present invention, viewed from the upper right. Figure 7 It is along Figure 6A Side sectional view observed along line VII-VII. Figure 8 It is along Figure 6A Side sectional view observed along lines VIII-VIII. Figure 9 It is along Figure 6A The front sectional view observed along the IX-IX line. Figure 10 This is a top view showing the positional relationship between the toilet body and the water tank device of the flush toilet according to the first embodiment of the present invention. Figure 11 This is a side sectional view showing the configuration of the functional devices of the flush toilet according to the first embodiment of the present invention. Figure 12 This is a perspective view of the water tank device of the flush toilet according to the second embodiment of the present invention, viewed from a slightly above left side. Figure 13 This is a top view showing the positional relationship between the toilet body and the water tank device of the flush toilet according to the second embodiment of the present invention. Symbol Explanation 1- The flush toilet according to the first embodiment; 2- Toilet body; 4- Water tank assembly; 12- Basin; 14- Drainage bend pipe; 14a- Inlet of drainage bend pipe; 16- Skirt; 20- Inner edge; 22- Inner edge spout; 24- Inner edge water guide; 26- Jet spout; 28- Jet water guide; 32- Water supply valve assembly; 34- Pump assembly; 34a- Inlet of pump assembly; 36- Switching valve assembly; 38- Control Device; 40-Base plate; 42-Water storage tank; 44-Water supply pipe for the tank; 46-Water supply unit for the tank; 48-Float switch; 54-Upstream connecting pipe; 56-Downstream connecting pipe; 58-Inner edge water supply pipe; 60-Jet water supply pipe; 70-First water tank section; 70a-Cross-sectional area of ​​the first water tank section; 70b-Cross-sectional area reduction section of the first water tank section; 70c-Upper wall of the first water tank section; 70d-Flow of the first water tank section Inlet pipe; 70e - Overflow pipe of the first water tank; 72 - Second water tank; 72a - Upper wall of the second water tank; 72b - Rear wall of the second water tank; 72c - Outlet pipe of the second water tank; 72d - Outlet of the outlet pipe; 72e - Inlet of the outlet pipe; 74 - Connecting part; 74a - Rear wall of the connecting part; 74b - Upper wall of the connecting part; 100 - Flushing toilet according to the second embodiment; 104 - Water tank device; 142 - Water tank; 170 - First water tank section; 172 - Second water tank section; 174 - Connecting part; S - Space inside the toilet body; A - Rear area of ​​the second water tank section within the space inside the toilet body; CL - Center line of the toilet body in the left-right direction; W - Wall surface; WL1 - Stop water level of the first water tank section; WL2 - Dead water level of the first water tank section; WL3 - Stop water level of the second water tank section; WL4 - Dead water level of the second water tank section. Detailed Implementation

[0020] Hereinafter, the flush toilet 1 according to the first embodiment of the present invention will be described with reference to the accompanying drawings. First, through Figures 1 to 3 The basic structure of the flush toilet 1 according to the first embodiment of the present invention will be described. Figure 1 This is a perspective view showing the flush toilet according to the first embodiment of the present invention. Figure 2 This is a top view of the toilet according to the first embodiment of the present invention with the sanitary cleaning device removed. Figure 3 It is along Figure 2 Side sectional view observed along line III-III. Figure 2 In the middle, the inner edge water guide path, the jet water guide path, and the jet water supply pipe are represented by dashed lines. Furthermore, in this instruction manual, when viewing the flushing toilet from the front, the near side is referred to as "front," the far side as "back," the left side as "left," and the right side as "right."

[0021] like Figure 1 As shown, the flushing toilet 1 according to the first embodiment of the present invention is a wall-mounted flushing toilet whose back is fixed to the wall surface W. The flushing toilet 1 includes: a ceramic toilet body 2; a water tank device 4 for storing flushing water supplied to the toilet body 2; and a sanitary cleaning device 6 placed on top of the toilet body 2. A stop valve 8 is provided on the wall surface W for supplying or stopping the flushing water supplied to the flushing toilet 1 from a water source such as tap water (not shown). The stop valve 8 is connected to the flushing toilet 1 via a water supply pipe 10.

[0022] like Figure 2 and Figure 3 As shown, the toilet body 2 has the following components: a basin 12 for receiving waste; a drain bend pipe 14 connected below the basin 12 for discharging waste; and a skirt 16 that surrounds the basin 12 and the drain bend pipe 14 from the outside. A space S is formed inside the toilet body 2 between the basin 12, the drain bend pipe 14, and the skirt 16.

[0023] The basin 12 includes: a basin-shaped waste receiving surface 18; and an inner edge 20 formed along the upper edge of the basin 12. Water will accumulate inside the basin 12.

[0024] The inner edge 20 includes an inner edge water outlet 22 for discharging cleaning water rearward, and an inner edge water guide 24 for guiding the cleaning water to the inner edge water outlet 22. The inner edge water outlet 22 is located near the center of the right side of the basin 12 in the front-rear direction. The cleaning water discharged from the inner edge water outlet 22 flows down along the inner circumferential surface of the inner edge 20 while swirling, to the dirt receiving surface 18, and cleans the basin 12.

[0025] Below the basin 12 are formed a jet nozzle 26 that discharges cleaning water into the inlet 14a of the drain bend pipe 14; and a jet guide passage 28 that supplies cleaning water to the jet nozzle 26. The jet nozzle 26 is configured to face the inlet 14a of the drain bend pipe 14. The cleaning water discharged from the jet nozzle 26 flows into the drain bend pipe 14, causing a siphon effect.

[0026] The flush toilet 1 according to the first embodiment of the present invention is a siphon-jet flush toilet that discharges waste by generating a siphon effect through jetting water. However, it is not limited to this method. Other methods are also possible, such as flushing flush toilets that flush away waste by the flow of water due to the drop of water, or siphon-jet flush toilets that discharge waste by generating a siphon effect through water jetting from the inner edge.

[0027] The drain bend pipe 14 includes: an inlet 14a connected to the lower part of the basin 12; an ascending pipe 14b extending upward from the inlet 14a; a top 14c positioned at the highest point of the ascending pipe 14b and defining the water level; and a rear pipe 14d extending substantially horizontally rearward from the top 14c. The rear pipe 14d of the drain bend pipe 14 is connected to a drain pipe (not shown) within the wall W via a drain connector 30.

[0028] The sanitary cleaning device 6 includes: a main body (not shown); a cleaning nozzle (not shown) configured to move in and out of the main body; a toilet seat (not shown) rotatably mounted on the main body; and a toilet lid rotatably mounted on the main body to cover the toilet seat. Additionally, a water supply pipe 10 connected to a drain plug 8 is connected to the main body of the sanitary cleaning device 6 to supply cleaning water sprayed from the cleaning nozzle.

[0029] like Figure 2 and Figure 3 As shown, a space S is formed within the toilet body 2 between the basin 12, the drain bend pipe 14, and the skirt 16. A water tank device 4 is housed in the space S below the basin 12 within the toilet body 2, enclosed by the skirt 16. A functional device for supplying flushing water to the toilet body is housed in the space S behind the basin 12 within the toilet body 2. This functional device includes, for example, a water supply valve device 32, a pump device 34, a switching valve device 36, and a control device 38. Furthermore, a base plate 40 is provided at the lower opening 2a enclosed by the skirt 16 of the toilet body 2, through which the functional device is supported.

[0030] Next, through Figure 4A and Figure 4B The water tank device 4, functional devices and base plate 40 housed in the space S within the toilet body 2 will be described. Figure 4A This is a perspective view of the functional device of the flushing toilet according to the first embodiment of the present invention, viewed from a slightly above left side. Figure 4B This is a perspective view of the functional device of the flushing toilet according to the first embodiment of the present invention, viewed from a slightly above right side. Figure 4A In the image, arrows indicate the direction of water flow for cleaning.

[0031] The water tank device 4 includes: a water storage tank 42 for storing cleaning water supplied to the toilet body 2; a water tank supply unit 46 for allowing cleaning water from the water tank supply pipe 44 to flow into the water storage tank 42; a float switch 48 for detecting the water level of the cleaning water stored in the water storage tank 42; and a fixing member 50 for fixing the water tank device 4 to the bottom surface of the toilet body 2.

[0032] When viewed from above, the water tank 42 is formed in an L-shape, extending forward on the right side of the drain bend pipe 14, and then bending to the left. The water tank 42 is a resin tank that stores cleaning water for inner edge discharge and jet discharge, and can hold approximately 4 liters of cleaning water.

[0033] A water tank supply unit 46 is disposed on the upper part of a water storage tank 42. The upstream side of the water tank supply unit 46 is connected to a water tank supply pipe 44, and the downstream side of the water tank supply unit 46 is connected to the water storage tank 42. Inside the water tank supply unit 46, a flow path is formed for guiding cleaning water from the water tank supply pipe 44 to the water storage tank 42.

[0034] A float switch 48 is positioned above the water storage tank 42. When the water level in the tank drops below the stop level (full water level), the float switch 48 is in the open state, causing the water supply valve 32 to open. Conversely, when the water level in the tank rises to the stop level, the float switch 48 is in the closed state, causing the water supply valve 32 to close.

[0035] An overflow unit 62 is installed on the water storage tank 42, which is used to discharge cleaning water out of the tank, for example, when the float switch 48 fails but the water supply to the tank continues. The overflow unit 62 is connected to the drain connector 30, and the cleaning water overflowing from the water storage tank 42 is discharged into the drain connector 30 through the overflow unit 62.

[0036] The water supply valve device 32 includes: a constant flow valve (not shown) for maintaining a constant flow rate of cleaning water; a switch valve (not shown) located downstream of the constant flow valve for switching the supply and stop of cleaning water; and a solenoid valve (not shown) for driving the switch valve. The upstream side of the water supply valve device 32 is connected to a water source (not shown) via a stop valve 8 and a water supply pipe 10. The downstream side of the water supply valve device 32 is connected to a sanitary cleaning device 6 via a sanitary cleaning device water supply pipe 52, and simultaneously connected to a water tank device 4 via a water tank water supply pipe 44. When the solenoid valve is electromagnetically activated, the switch valve opens, and cleaning water from the water source is supplied to the water tank device 4 via the water tank water supply pipe 44.

[0037] The pump device 34 is a pressurized pump that draws in the cleaning water stored in the water tank device 4 and pressurizes and delivers it to the toilet body 2. The upstream side of the pump device 34 is connected to the water tank device 4 via an upstream connecting pipe 54, and the downstream side of the pump device 34 is connected to the switching valve device 36 via a downstream connecting pipe 56. Through the operation of the pump device 34, the cleaning water stored in the water tank device 4 is pressurized and delivered and discharged from the inner edge discharge port 22 and the jet discharge port 26, thereby cleaning the toilet. Furthermore, in the flush toilet 1 according to the first embodiment of the present invention, although the cleaning water stored in the water tank device 4 is supplied to the inner edge discharge port 22 and the jet discharge port 26, it is not limited to this method. Instead, it can be applied in other ways, for example, to a method in which all the cleaning water stored in the water tank device 4 is discharged from the inner edge discharge port 22.

[0038] The switching valve device 36 includes a switching valve body (not shown) that switches the water supply path from the pump device 34, which supplies cleaning water to the inner edge discharge port 22 and the jet discharge port 26. The upstream side of the switching valve device 36 is connected to the pump device 34 via a downstream connecting pipe 56, while the downstream side is connected to the inner edge guide water path 24 via an inner edge water supply pipe 58 and to the jet guide water path 28 via a jet water supply pipe 60. When the switching valve body is closed, cleaning water from the pump device 34 is supplied to the inner edge discharge port 22; when the switching valve body is open, cleaning water from the pump device 34 is supplied to both the inner edge discharge port 22 and the jet discharge port 26.

[0039] The control device 38 is electrically connected to the remote control (not shown), the water tank device 4 (float switch 48), the sanitary cleaning device 6, the water supply valve device 32, and the pump device 34, and can send and receive various signals. When it receives a cleaning start signal from the remote control for a large or small cleaning cycle, the control device 38 will drive or stop the pump device 34 according to the pre-stored cleaning program. Specifically, if the user operates the remote control, the control device 38 drives the pump device 34 to discharge the cleaning water stored in the water tank device 4 from the inner edge outlet 22 and the jet outlet 26. In addition, the control device 38 opens the water supply valve device 32 to supply water to the water tank, and closes the water supply valve device 32 to stop the water supply when the float switch 48 detects that the water tank is full.

[0040] The pipes (water supply pipe 10, water tank water supply pipe 44, sanitary cleaning device water supply pipe 52, upstream connecting pipe 54, downstream connecting pipe 56, inner edge water supply pipe 58, and jet water supply pipe 60) connected to the above-mentioned functional devices are flexible and can absorb manufacturing errors of the ceramic toilet body 2.

[0041] Next, through Figure 5The water supply path through which the cleaning water flows in the flushing toilet 1 according to the first embodiment of the present invention will be described. Figure 5 This is a structural diagram showing the water supply path through which the flushing water of the toilet according to the first embodiment of the present invention flows.

[0042] In the water supply line of the flush toilet 1, a stop valve 8, a water supply valve device 32, a water tank device 4, a pump device 34, and a switching valve device 36 are installed from the upstream side. First, cleaning water is supplied from the water source to the water supply valve device 32 through the stop valve 8 and the water supply pipe 10. The cleaning water supplied to the water supply valve device 32 is supplied to the sanitary washing device 6 through the sanitary washing device water supply pipe 52, and simultaneously supplied to the water tank device 4 through the water tank water supply pipe 44. The cleaning water stored in the water tank device 4 is drawn up by the pump device 34 through the upstream connecting pipe 54, and then supplied to the switching valve device 36 through the downstream connecting pipe 56. The cleaning water supplied to the switching valve device 36 is discharged from the inner edge outlet 22 through the inner edge water supply pipe 58 and the inner edge guide water passage 24, and simultaneously discharged from the jet outlet 26 through the jet water supply pipe 60 and the jet guide water passage 28. In addition, the cleaning water that overflows from the water tank device 4 is discharged to the drain connector 30 via the overflow unit 62.

[0043] Next, through Figures 6A to 9 The water tank device 4 of the flush toilet 1 according to the first embodiment of the present invention will be described in detail. Figure 6A This is a perspective view of the water tank device of the flush toilet according to the first embodiment of the present invention, viewed from a slightly above left side. Figure 6B This is a perspective view of the water tank device of the flush toilet according to the first embodiment of the present invention, viewed from a slightly above right side. Figure 7 It is along Figure 6A Side sectional view observed along line VII-VII. Figure 8 It is along Figure 6A Side sectional view observed along lines VIII-VIII. Figure 9 It is along Figure 6A The front sectional view observed along the IX-IX line.

[0044] like Figure 6A and Figure 6BAs shown, when viewed from above, the water tank 42 of the water tank device 4 is formed in an L-shape, and is asymmetrical from left to right relative to the center line CL in the left-right direction of the toilet body 2. The water tank 42 includes: a first tank section 70, located closer to the right side than the center line CL; a second tank section 72, located closer to the left side than the center line CL; and a connecting section 74 connecting the first tank section 70 and the second tank section 72. The vertical height of the first tank section 70 is set to be greater than the vertical height of the second tank section 72, and the longitudinal length of the first tank section 70 is set to be greater than the longitudinal length of the second tank section 72. Therefore, the capacity (volume) of the first tank section 70 is set to be greater than the capacity of the second tank section 72. Furthermore, since the front-to-back length of the second water tank section 72 is set to be less than the front-to-back length of the first water tank section 70, functional devices such as a pump device 34 can be installed in the rear region A of the second water tank section 72.

[0045] like Figure 7 As shown, the water level in the first water tank section 70 can rise to the stop water level (full water level) WL1 and fall to the dead water level WL2. The first water tank section 70 includes: a section with a fixed cross-sectional area 70a, the horizontal cross-sectional area of ​​the first water tank section 70 being formed to be approximately fixed; and a section with a reduced cross-sectional area 70b, the horizontal cross-sectional area of ​​the first water tank section 70 decreasing upwards. The water level rise rate in the section with a reduced cross-sectional area 70b is greater than the water level rise rate in the section with a fixed cross-sectional area 70a. An inflow pipe 70d extending vertically is formed on the upper wall 70c of the first water tank section 70, and this inflow pipe 70d is connected to the water tank supply unit 46. Thus, cleaning water from the water supply source flows into the water tank from the inflow pipe 70d.

[0046] A float switch 48 for detecting the water level of the cleaning water stored in the tank is fixed on the upper wall 70c of the first water tank section 70. The float switch 48 is disposed in the cross-sectional area reduction section 70b of the first water tank section 70. When the water level in the tank drops below the stop water level WL1, the float switch 48 is in the open state, and when the water level in the tank rises to the stop water level WL1, it is in the closed state.

[0047] An overflow pipe 70e is provided in the first water tank section 70, which is used to discharge cleaning water to the outside of the water tank, for example, when the float switch 48 fails but the water supply to the tank continues. The overflow pipe 70e extends in the vertical direction, and its upper end is connected to the overflow unit 62. Thus, the cleaning water discharged from the overflow pipe 70e is discharged into the drain connector 30 via the overflow unit 62.

[0048] like Figure 8As shown, the water level in the second water tank 72 can rise to the stop water level WL3 and fall to the dead water level WL4. The stop water level WL3 of the second water tank 72 is set lower than the stop water level WL1 of the first water tank 70, and the dead water level WL4 of the second water tank 72 is set to the same height as the dead water level WL2 of the first water tank 70 (see reference). Figure 9 The horizontal cross-sectional area of ​​the second water tank section 72 is approximately constant. The vertical height of the second water tank section 72 is set to be approximately half the cross-sectional area 70a of the first water tank section 70, and the upper wall 72a of the second water tank section 72 is set to be lower than the upper wall 70c of the first water tank section 70. As a result, the space for air retention within the second water tank section 72 is reduced, making the second water tank section 72 more compact.

[0049] The front-to-back length of the second water tank section 72 is set to be less than half the front-to-back length of the first water tank section 70, preferably about one-third. Furthermore, the rear wall 72b of the second water tank section 72 and the rear wall 74a of the connecting portion 74 are formed from the same surface. Because the second water tank section 72 is smaller than the first water tank section 70, a space, namely the rear region A (see reference 34), is formed behind the rear wall 72b of the second water tank section 72 for arranging functional devices such as the pump device 34. Figure 6A and Figure 6B In addition, the front-to-back length of the rear region A is set to be approximately twice the front-to-back length of the second water tank section 72.

[0050] An outflow pipe 72c extending in the front-rear direction is formed on the rear wall 72b of the second water tank section 72. The outlet 72d of the outflow pipe 72c opens rearward. The inlet 72e of the outflow pipe 72c opens downward. The outlet 72d of the outflow pipe 72c is connected to the upstream connecting pipe 54, supplying the cleaning water in the water tank to the pump device 34. Because the inlet 72e of the outflow pipe 72c opens downward within the second water tank section 72, the dead water levels WL2 and WL4 can be lowered.

[0051] like Figure 9 As shown, the connecting portion 74 is disposed between the first water tank portion 70 and the second water tank portion 72. The vertical height of the connecting portion 74 is set to be smaller than the vertical height of the second water tank portion 72, and the upper wall 74b of the connecting portion 74 is set to be lower than the upper wall 72a of the second water tank portion 72. Furthermore, the upper wall 74b of the connecting portion 74 is formed in a concave shape facing downwards. A jet guide channel 28 is disposed on this concave upper wall 74b.

[0052] Next, through Figure 10The positional relationship between the toilet body and the water tank device of the flush toilet according to the first embodiment of the present invention will be described in detail. Figure 10 This is a top view showing the positional relationship between the toilet body and the water tank device of the flush toilet according to the first embodiment of the present invention. Figure 10 In the image, the toilet body 2 is represented by a double-dotted line.

[0053] like Figure 10 As shown, the water tank 42 of the water tank device 4 is disposed below the basin 12 inside the toilet body 2. The first water tank section 70 of the water tank 42 is disposed closer to the right side than the center line CL in the left-right direction of the toilet body 2, while the second water tank section 72 is disposed closer to the left side than the center line CL. The connecting part 74 of the water tank 42 is disposed near the center line CL. The first water tank section 70 and the second water tank section 72 are disposed in a manner that clamps the drain bend pipe 14. In addition, the connecting part 74 is disposed directly below the jet nozzle 26 and the jet guide water passage 28. The jet guide water passage 28 is disposed on the concave upper wall 74b of the connecting part 74.

[0054] The front end of the water tank 42 is located near the center of the basin 12 of the toilet body 2 in the front-rear direction. The left and right ends of the water tank 42 are located further outward than the left and right ends of the basin 12. The rear end of the first tank section 70 of the water tank 42 is located further rearward than the rear end of the basin 12, and the rear end of the second tank section 72 is located further forward than the rear end of the basin 12. Thus, a space is formed in the rear region A of the second tank section 72 for arranging functional devices such as the pump device 34.

[0055] Next, through Figure 11 The positional relationship between the water tank device and the functional device of the flush toilet 1 according to the first embodiment of the present invention will be described in detail. Figure 11 This is a side sectional view showing the configuration of the functional devices of the flush toilet according to the first embodiment of the present invention.

[0056] like Figure 11As shown, in the rear area A of the second water tank section 72 of the water storage tank 42, functional devices such as a pump device 34, a switching valve device 36, and a control device 38 are arranged. The pump device 34, the control device 38, and the switching valve device 36 are arranged in a roughly vertical row. In addition, in the rear area A of the second water tank section 72, there are: an upstream connecting pipe 54 connecting the water tank device 4 and the pump device 34; a downstream connecting pipe 56 connecting the pump device 34 and the switching valve device 36; an inner edge water supply pipe 58 connecting the switching valve device 36 and the inner edge water guide passage 24; and a jet water supply pipe 60 connecting the switching valve device 36 and the jet water guide passage 28.

[0057] The pump assembly 34 is disposed near the rear wall 72b of the second water tank section 72. The pump assembly 34 is configured to have a height approximately the same as that of the second water tank section 72. The outlet 72d of the outflow pipe 72c of the second water tank section 72 is opposite to the inflow inlet 34a of the pump assembly 34, and is configured to have a height approximately the same as that of the inflow inlet 34a of the pump assembly 34. As a result, the upstream connecting pipe 54 connecting the water tank assembly 4 and the pump assembly 34 can be formed in a straight line, achieving a compact design.

[0058] The control device 38 is fixed to the top of the pump device 34, and the switching valve device 36 is fixed to the top of the control device 38. A downstream connecting pipe 56 connecting the pump device 34 and the switching valve device 36 is disposed near the control device 38, arranged side-by-side with it. When viewed from above, the pump device 34, control device 38, and switching valve device 36 are each configured such that at least a portion overlaps. When viewed from above, the switching valve device 36 is disposed on the outer periphery of the pump device 34 and inside the outer periphery of the control device 38. When viewed from above, the downstream connecting pipe 56 is located inside the outer periphery of the pump device 34.

[0059] The following describes the effects of the flush toilet 1 according to the first embodiment described above. First, according to an embodiment of the present invention, the flush toilet 1, when viewed from above, comprises: a first tank portion 70, positioned closer to one side than the center in the left-right direction of the toilet body 2; and a second tank portion 72, positioned closer to the other side than the center in the left-right direction of the toilet body 2. The front-back length of the second tank portion 72 is set to be less than half the front-back length of the first tank portion 70. Therefore, a functional device can be accommodated in the rear region A of the second tank portion 72, and the tank device 4 and the functional device can be compactly accommodated in the space S within the toilet body 2. Thus, while ensuring the capacity of the tank device 4, it is possible to accommodate the tank device 4 within the toilet body 2.

[0060] Furthermore, in the flush toilet 1 according to the embodiment of the present invention, since the tank device 4 has a connecting part 74 that connects the first tank part 70 and the second tank part 72, when viewed from above, the connecting part 74 is arranged in the center of the basin part 12 in the front-back direction. Therefore, compared with the connecting part 74 being arranged in front of the basin part 12, the shape of the skirt part 16 in front of the toilet body 2 can be freely designed.

[0061] Furthermore, the flush toilet 1 according to the embodiment of the present invention includes: a jet nozzle 26 disposed below the basin 12 to discharge cleaning water into the inlet 14a of the drain bend pipe 14; and a jet guide channel 28 to supply cleaning water to the jet nozzle 26. The upper wall 74b of the connecting portion 74 is formed in a concave shape, and the jet guide channel 28 is disposed on the concave upper wall 74b. Therefore, interference between the water tank device 4 and the jet guide channel 28 can be avoided.

[0062] Furthermore, in the flush toilet 1 according to the embodiment of the present invention, since the upper wall 72a of the second water tank 72 is set to be lower than the upper wall 70c of the first water tank 70, the space for air retention in the second water tank 72 can be reduced, and the water tank device 4 can be made more compact.

[0063] Furthermore, according to the embodiment of the present invention, since the water level WL1 of the first water tank 70 is set to be higher than the water level WL3 of the second water tank 72, a larger amount of flushing water can be stored even if the water tank device 4 is made compact.

[0064] Furthermore, according to the embodiments of the present invention, the flush toilet 1, since the functional device is a pump device 34 that pressurizes and delivers the cleaning water stored in the water tank device 4 to the toilet body 2, can compactly house the water tank device 4 and the pump device 34 within the space S inside the toilet body 2.

[0065] Furthermore, the flush toilet 1 according to the embodiment of the present invention includes: a jet nozzle 26 disposed below the basin 12, which discharges cleaning water into the inlet 14a of the drain bend pipe 14; a jet guide passage 28 that supplies cleaning water to the jet nozzle 26; and a jet water supply pipe 60 that connects the jet guide passage 28 to the pump device 34. The pump device 34 and the jet water supply pipe 60 are housed in the space S inside the toilet body 12 behind the second tank 72. Therefore, the tank device 4, the pump device 34, and the jet water supply pipe 60 can be compactly housed in the space S inside the toilet body 2.

[0066] Furthermore, the flush toilet 1 according to the embodiment of the present invention includes: an inner edge spout 22 disposed on the inner edge portion 20 of the basin portion 12 and spouting cleaning water; an inner edge water guide 24 supplying cleaning water to the inner edge spout 22; and an inner edge water supply pipe 58 connecting the inner edge water guide 24 and the pump device 34. The pump device 34 and the inner edge water supply pipe are housed in the space S behind the second water tank portion 72 within the toilet body 2. Therefore, the water tank device 4, the pump device 34, and the inner edge water supply pipe 58 can be compactly housed in the space S within the toilet body 2.

[0067] Furthermore, according to the embodiment of the present invention, since the pump device 34 is located near the second water tank 72, the water tank device 4 and the pump device 34 can be compactly housed in the space S inside the toilet body 2.

[0068] Furthermore, according to the embodiment of the present invention, the flush toilet 1 is provided with an outlet pipe 72c in the second water tank section 72 for the flushing water stored in the water tank device 4 to flow out, and the outlet 72d of the outlet pipe 72c is configured to face the inlet 34a of the pump device 34, so that the water tank device 4 and the pump device 34 can be compactly connected.

[0069] Furthermore, according to the embodiment of the present invention, since the inlet of the outlet pipe of the second water tank 72 is open downward, the dead water level WL2 and WL4 of the flushing water in the water tank device 4 can be reduced, and the water tank device 4 can be made more compact.

[0070] Furthermore, in the flush toilet 1 according to the embodiment of the present invention, since the water tank device 4 includes: a cross-sectional area reduction portion 70b, the horizontal cross-sectional area of ​​the water tank device 4 is reduced upward; and a float switch 48, which detects the water level of the flushing water stored in the water tank device 4, and the float switch 48 is disposed in the cross-sectional area reduction portion 70b, the water level rise speed can be increased within the cross-sectional area reduction portion 70b to cause the float switch 48 to operate, thereby improving the detection accuracy of the float switch 48 in detecting the water level.

[0071] Next, through Figure 12 and Figure 13 The flush toilet 100 according to the second embodiment of the present invention will be described. Except for the shape of the water tank, the basic structure is the same as that of the flush toilet 1 according to the first embodiment described above. Hereinafter, only the differences from the flush toilet 1 according to the first embodiment will be described, and the description of the same structure, function and effect will be omitted.

[0072] Figure 12 This is a perspective view of the water tank device of the flush toilet according to the second embodiment of the present invention, viewed from a slightly above left side. Figure 13 This is a top view showing the positional relationship between the toilet body and the water tank device of the flush toilet according to the second embodiment of the present invention. Figure 13 In the image, the toilet body 102 is represented by a double-dotted line.

[0073] like Figure 12 and Figure 13 As shown, when viewed from above, the water tank 142 of the water tank device 104 is formed in a J-shape, and is asymmetrical from left to right relative to the center line CL in the left-right direction of the toilet body 102. The water tank 142 includes: a first tank section 170, which is located closer to the right side than the center line CL; a second tank section 172, which is located closer to the left side than the center line CL; and a connecting section 174 connecting the first tank section 170 and the second tank section 172. The front-back length of the connecting section 174 is set to be less than the front-back length of the second tank section 172.

[0074] According to the second embodiment of the present invention, the water tank device 104 can be further compacted because the front-to-back length of the connecting portion 174 connecting the first water tank portion 170 and the second water tank portion 172 is set to be less than the front-to-back length of the second water tank portion 172.

[0075] The invention is not limited to the embodiments described above. Various changes and modifications can be made within the scope of the technical concept described in the claims.

Claims

1. A flush toilet which is a wall-hung flush toilet, having: a toilet body which has a bowl portion that receives excrement, a drain trap line that is connected to a lower portion of the bowl portion and that discharges excrement, and a skirt portion that surrounds the bowl portion and the drain trap line from the outside; a tank device that is disposed in a space below the bowl portion in the toilet body, and that stores cleaning water that is supplied to the toilet body; and a function device that supplies cleaning water to the toilet body, characterized in that: when viewed from above, the tank device has a first tank portion that is disposed closer to one side than a center in a left-right direction of the toilet body, and a second tank portion that is disposed closer to the other side than the center in the left-right direction of the toilet body, and a front-rear direction length of the second tank portion is set to be less than or equal to half of a front-rear direction length of the first tank portion.

2. The flush toilet according to claim 1, characterized in that: the tank device has a connection portion that connects the first tank portion and the second tank portion, and when viewed from above, the connection portion is disposed at a center in a front-rear direction of the bowl portion.

3. The flush toilet according to claim 2, characterized in that: it has: a jet discharge port that is disposed below the bowl portion, and that discharges cleaning water to an inlet of the drain trap line; and a jet water guide that supplies cleaning water to the jet discharge port, and an upper wall of the connection portion is formed in a concave shape, and the jet water guide is disposed on the upper wall of the concave shape. the upper wall of the second tank portion is set to be lower than the upper wall of the first tank portion. a water stop level of the first tank portion is set to be higher than a water stop level of the second tank portion. the function device is a pump device that pressurizes and supplies cleaning water stored in the tank device to the toilet body.

7. The flush toilet according to claim 6, characterized in that: it has: a jet discharge port that is disposed below the bowl portion, and that discharges cleaning water to an inlet of the drain trap line; a jet water guide that supplies cleaning water to the jet discharge port; and a jet water supply pipe that connects the jet water guide and the pump device, and the pump device and the jet water supply pipe are housed in a space behind the second tank portion in the toilet body.

8. The flush toilet according to claim 6 or 7, characterized in that: it has: an inner edge discharge port that is disposed at an inner edge portion of the bowl portion, and that discharges cleaning water; an inner edge water guide that supplies cleaning water to the inner edge discharge port; and an inner edge water supply pipe that connects the inner edge water guide and the pump device, and the pump device and the inner edge water supply pipe are housed in the space behind the second tank portion in the toilet body. the pump device is disposed in the vicinity of the second tank portion. the second tank portion is provided with an outflow line through which cleaning water stored in the tank device flows out, and an outlet of the outflow line is disposed so as to face an inflow inlet of the pump device. an inflow inlet of the outflow line of the second tank portion is open downward.

12. The flush toilet according to claim 1, characterized in that:

4. A flushing toilet according to claim 1, characterised in that ​ 5. A flushing toilet according to claim 4, characterised in that ​ 6. A flushing toilet according to claim 1, characterised in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. A flushing toilet according to claim 6, characterised in that ​ 10. The flushing toilet according to claim 9, characterized in that, ​ 11. A flushing toilet according to claim 10, characterised in that ​ ​ The water tank device is provided with: a cross-sectional area reducing portion in which a horizontal cross-sectional area of the water tank device is reduced upward; and a float switch that detects a water level of cleaning water stored in the water tank device, The float switch is disposed at the cross-sectional area reducing portion.

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