Flush toilet

Abstract

The purpose of the present invention is to provide a flush toilet in which a water tank device can be stably fixed to a toilet body while enlarging the space inside the toilet body. 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 fixing member for fixing the water tank device to the toilet main body, the toilet main body being provided with: a hollow part, the interior of which is formed by a closed space; and a first water tank fixing part, a second water tank fixing part and a third water tank fixing part which fix the water tank device through a fixing component, and each water tank fixing part is arranged in the hollow part.

Description

Technical Field

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

[0002] As has been known in the past, as described in Patent Documents 1 to 4, flush toilets that house a water tank in the space below the basin inside the toilet body are known to be flush toilets. In the existing flush toilet described in Patent Document 1, it is a wall-mounted flush toilet, in which the water tank and the toilet body are fixed to the wall. In addition, among the existing flush toilets described in Patent Documents 2 and 3, there are wall-mounted flush toilets and floor-mounted flush toilets, with the water tank fixed to the toilet body by a bracket. Furthermore, in the existing flush toilet described in Patent Document 4, it is a wall-mounted flush toilet with a protrusion that protrudes laterally from the inner wall of the toilet body, and the water tank is fixed to the protrusion.

[0003] Patent documents Patent Document 1: Japanese Patent Application Publication No. 2024-031499 Patent Document 2: Japanese Patent Application Publication No. 2024-031498 Patent Document 3: Japanese Patent Application Publication No. 2014-114635 Patent Document 4: Chinese Utility Model No. 219825498 Summary of the Invention

[0004] However, in existing flush toilets as described in Patent Document 1, since the water tank is fixed to the wall together with the toilet body, there is a problem that the water tank cannot be removed during maintenance unless the toilet body is removed. In response to this issue, in existing flush toilets as described in Patent Documents 2 and 3, the water tank is fixed to the toilet body by a bracket, so the water tank can be removed without removing the toilet body during maintenance. However, due to the use of the bracket, the space inside the toilet body for accommodating the water tank is narrowed. On the other hand, in the existing flush toilets described in Patent Document 4, since the water tank is fixed to the protrusion without the use of a bracket, the space inside the toilet body for accommodating the water tank can be expanded. However, since the water tank is fixed to the protrusion that protrudes laterally from the inner wall of the toilet body, there is a problem that the protrusion may be damaged due to the weight of the water tank.

[0005] Therefore, the present invention was made to solve the above-mentioned problems, and its purpose is to provide a flush toilet that can expand the space inside the toilet body and at the same time stably fix the water tank device to the toilet body.

[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 pipe connected below the basin for discharging waste, and a skirt surrounding the basin and the drain 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 fixing member for fixing the water tank device to the toilet body. The toilet body is characterized by having: a hollow portion, the interior of which is formed by an enclosed space; and a water tank fixing part, which is disposed in the hollow portion and fixes the water tank device to the fixing member. In this invention, the toilet body has a hollow portion, the interior of which is formed by a closed space, and a water tank fixing portion, which is provided in the hollow portion by a fixing member. Therefore, the space inside the toilet body can be expanded, and the water tank device can be stably fixed to the toilet body.

[0007] In this invention, the water tank fixing part is preferably disposed on the skirt. In this invention, since the water tank fixing part is provided in the skirt, the space inside the toilet body can be expanded.

[0008] In addition, in this invention, it is preferable that a stepped portion that is recessed upward is formed on the bottom surface of the toilet body, and the water tank fixing portion is disposed on the stepped portion. In this invention, since a recessed step is formed on the bottom surface of the toilet body and the tank fixing part is provided on the step, the tank device can be stably fixed to the toilet body.

[0009] In this invention, it is preferable to have a wall fixing part for fixing the toilet body to the wall, and a water tank fixing part is provided in the wall fixing part. In this invention, since a wall fixing part is provided for fixing the toilet body to the wall and a water tank fixing part is provided in the wall fixing part, the space inside the toilet body can be expanded.

[0010] Furthermore, in this invention, it is preferable to have three or more water tank fixing parts, which are arranged such that when viewed from below, the center of gravity of the water tank device is located inside the imaginary line connecting the water tank fixing parts. In this invention, since it has three or more water tank fixing parts, when viewed from below, the water tank fixing parts are arranged such that the center of gravity of the water tank device is located inside the imaginary line connecting the water tank fixing parts, thus the water tank device can be stably fixed to the toilet body.

[0011] In this invention, it is preferable that the water tank device is composed of an upper water tank component and a lower water tank component that engages with the upper water tank component, and the lower water tank component is fixed to the water tank fixing part. In this invention, the water tank device is composed of an upper water tank member and a lower water tank member that engages with the upper water tank member. The lower water tank member is fixed to the water tank fixing part. Therefore, compared with the case where the upper water tank member is fixed to the water tank fixing part, the upper water tank member and the lower water tank member can be stably engaged.

[0012] In addition, the present invention preferably includes: a functional device for supplying cleaning water to the toilet body; a base plate for supporting the functional device; and a fixing member for fixing the base plate to the toilet body, wherein the toilet body has a fixing part for fixing the base plate by the fixing member, and the base plate fixing part is provided in the hollow part. In this invention, the following features are provided: a functional device for supplying cleaning water to the toilet body; a base plate for supporting the functional device; and a fixing member for fixing the base plate to the toilet body. The toilet body has a base plate fixing part for fixing the base plate by the fixing member. The base plate fixing part is provided in the hollow part, thus expanding the space inside the toilet body and stably fixing the base plate to the toilet body.

[0013] In this invention, the base plate fixing part is preferably provided on the skirt. In this invention, since the base plate fixing part is provided in the skirt, the space inside the toilet body can be expanded.

[0014] In addition, in this invention, it is preferable that an upwardly recessed step is formed on the bottom surface of the toilet body, and the base plate fixing part is provided on the step. In this invention, since a recessed step is formed on the bottom surface of the toilet body and a base plate fixing part is provided on the step, the base plate can be stably fixed to the toilet body.

[0015] In this invention, it is preferable to have a wall fixing part for fixing the toilet body to the wall, and a base plate fixing part is provided in the wall fixing part. In this invention, since a wall fixing part for fixing the toilet body to the wall is provided and a base plate fixing part is provided in the wall fixing part, the space inside the toilet body can be expanded.

[0016] In addition, in this invention, it is preferable to have three or more base plate fixing parts, and when viewed from below, the base plate fixing parts are arranged such that the center of gravity of the base plate is located inside the imaginary line connecting the base plate fixing parts. In this invention, since it has three or more base plate fixing parts, when viewed from below, the base plate fixing parts are arranged such that the center of gravity of the base plate is located inside the imaginary line connecting the base plate fixing parts, thus the base plate can be stably fixed to the toilet body.

[0017] In this invention, it is preferable that at least one of the water tank fixing part and the base plate fixing part is shared. In this invention, since at least one of the water tank fixing part and the base plate fixing part is shared, the space inside the toilet body can be expanded.

[0018] Furthermore, in this invention, it is preferable that the fixing part closest to the center of gravity of the water tank device and the base plate fixing part in the water tank fixing part are formed separately. In this invention, since the fixing part closest to the center of gravity of the water tank device and the base plate fixing part in the water tank fixing part are formed respectively, the water tank device can be stably fixed to the toilet body.

[0019] In this invention, it is preferable that the fixing part closest to the center of gravity of the base plate and the water tank fixing part are formed separately. In this invention, since the fixing part closest to the center of gravity of the base plate and the water tank fixing part are formed separately in the base plate fixing part, the base plate can be stably fixed to the toilet body.

[0020] In addition, in this invention, it is preferable that when viewed from below, the water tank device is formed in an L-shape and the base plate is formed in a rectangular shape. In this invention, since the water tank device is formed in an L-shape and the base plate is formed in a rectangular shape when viewed from below, it is able to cover the lower opening of the toilet body.

[0021] The flushing toilet according to the present invention can expand the space inside the toilet body, while stably fixing the water tank device to the toilet body. Attached Figure Description

[0022] Figure 1 This is a perspective view of a flush toilet according to one embodiment of the present invention. Figure 2 This is a top view of a flush toilet with the sanitary cleaning device removed, according to one embodiment of the present invention. Figure 3 It is along Figure 2Side sectional view observed along line III-III. Figure 4A This is a perspective view of the functional device of a flushing toilet according to an embodiment of the present invention, viewed from a slightly above left side. Figure 4B This is a perspective view of the functional device of a flushing toilet according to an 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 a toilet according to one embodiment of the present invention flows. Figure 6 This is a bottom view of the toilet body of a flushing toilet according to one embodiment of the present invention. Figure 7A This is a perspective view of the water tank device of a flush toilet according to one embodiment of the present invention, viewed from a slightly above left side. Figure 7B This is a perspective view of the water tank device of a flush toilet according to one embodiment of the present invention, viewed from a slightly above right side. Figure 8 This is a bottom view of the water tank device of a flush toilet according to one embodiment of the present invention. Figure 9 This is a perspective view of the base plate of a flush toilet according to one embodiment of the present invention. Figure 10 This is a bottom view of the base plate of a flush toilet according to one embodiment of the present invention. Figure 11 This is a bottom view showing the state in which the water tank assembly and base plate are installed in a flush toilet according to one embodiment of the present invention. Figure 12 It is along Figure 11 An enlarged sectional view observed along line XII-XII. Figure 13 It is along Figure 11 An enlarged cross-sectional view observed along line XIII-XIII. Symbol Explanation 1-Flush toilet; 2-Toilet body; 4-Tank assembly; 12-Basin; 14-Drainage bend pipe; 16-Skirt; 16a-Outer wall; 16b-Inner wall; 32-Water supply valve assembly; 34-Pump assembly; 36-Switching valve assembly; 38-Control device; 40-Base plate; 40a-First mounting part of base plate; 40b-Second mounting part of base plate; 40c-Temporary fixing part of base plate; 40d-Pump fixing part of base plate; 40e-Water supply valve fixing part of base plate; 40f-Through hole of base plate; 42-Water tank; 50-Fixing component; 50a-Rubber bushing; 50b-Nut; 50c-Bolt; 50d-Washer; 64-First tank fixing part ; 66 - Second water tank fixing part; 68 - Third water tank fixing part; 70 - First base plate fixing part; 72 - Second base plate fixing part; 74 - Hollow part; 76 - Wall fixing part; 78 - Step part; 86 - Upper water tank component; 88 - Lower water tank component; 88a - First mounting part of lower water tank component; 88b - Second mounting part of lower water tank component; 88c - Third mounting part of lower water tank component; 88d - Temporary fixing part of lower water tank component; CL - Center line of the toilet body in the left-right direction; S - Space inside the toilet body; A - Rear area of ​​the second water tank part in the space inside the toilet body; G1 - Center of gravity of the water tank; V - Imaginary line connecting the water tank fixing part; W - Wall surface. Detailed Implementation

[0023] Hereinafter, a flush toilet 1 according to one embodiment of the present invention will be described with reference to the accompanying drawings. First, through Figures 1 to 3 The basic structure of a flush toilet 1 according to one embodiment of the present invention will be described. Figure 1 This is a perspective view showing a flush toilet according to one embodiment of the present invention. Figure 2 This is a top view of a flush toilet with the sanitary cleaning device removed, according to one embodiment of the present invention. 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."

[0024] like Figure 1As shown, one embodiment of the present invention relates to a wall-mounted flushing toilet 1 whose back is fixed to a wall W. The flushing toilet 1 includes: a ceramic toilet body 2; a water tank 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 W for supplying or stopping flushing water from a water source (not shown) such as tap water to the flushing toilet 1. This stop valve 8 is connected to the flushing toilet 1 via a water supply pipe 10.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] One embodiment of the present invention relates to a flushing toilet 1 that uses a siphon jet flushing device to generate a siphon effect by spraying water to discharge waste. However, it is not limited to this method. Other methods are also possible, such as a flushing toilet that uses the flow of water due to the drop in water level to flush away waste, or a siphon flushing toilet that uses water sprayed from the inner edge to generate a siphon effect to discharge waste.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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 a flushing toilet according to one embodiment of the present invention, viewed from a slightly above left side. Figure 4B This is a perspective view of the functional device of a flushing toilet according to an 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 one 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Next, through Figure 5The water supply path through which the cleaning water flows in a flush toilet 1 according to one 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 a toilet according to one embodiment of the present invention flows.

[0045] 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.

[0046] Next, through Figure 6 The toilet body 2 of a flush toilet 1 according to one embodiment of the present invention will be described in detail. Figure 6 This is a bottom view of the toilet body of a flushing toilet according to one embodiment of the present invention. Figure 6 In the diagram, the inner wall 16a and outer wall 16b of the skirt 16 of the toilet body 2 are represented by dashed lines.

[0047] like Figure 6 As shown, on the bottom surface of the toilet body 2, as fixing parts for fixing the tank assembly 4 to the toilet body 2, there are a first tank fixing part 64 on the front right side, a second tank fixing part 66 on the rear right side, and a third tank fixing part 68 on the front left side. Additionally, on the bottom surface of the toilet body 2, as fixing parts for fixing the base plate 40 to the toilet body 2, there are a first base plate fixing part 70 on the front left side and a second base plate fixing part 72 on the rear left side. Furthermore, the third tank fixing part 68 and the first base plate fixing part 70 are formed as a single, shared fixing part. The fixing parts of the tank assembly 4 and the base plate 40 each have fixing holes for inserting fixing members 50.

[0048] like Figure 6As shown, the skirt 16 includes: an inner wall 16a forming an inner wall surface; and an outer wall 16b positioned closer to the outer side than the inner wall 16a, forming an outer wall surface. When viewed from below, the inner wall 16a and the outer wall 16b form a closed space in the skirt 16. Thus, a hollow portion 74 formed by the closed space is created within the skirt 16 (see reference). Figure 6 The hollow portion 74 is formed by a single-layer molding process that forms a hollow molded body. Furthermore, the hollow portion 74 is provided with a water tank fixing part for the water tank device 4 and a base plate fixing part for the base plate 40. Therefore, the hollow portion 74, formed by a space enclosed by the inner sidewall 16a and the outer sidewall 16b, is stronger and less prone to breakage than a solid portion (formed by a double-layer molding process that forms a solid molded body), thus enabling stable fixing of the water tank device 4 and the base plate 40.

[0049] Each fixing part of the water tank assembly 4 and the base plate 40 is provided on the bottom surface of the skirt 16. Furthermore, a second water tank fixing part 66 and a second base plate fixing part 72 are provided on the wall fixing part 76 for fixing the toilet body 2 to the wall surface W. The wall fixing part 76 has a predetermined thickness extending from the back of the toilet body 2 towards the front. Moreover, two upwardly recessed stepped parts 78 are formed on the bottom surface of the wall fixing part 76. The stepped parts 78 are arranged symmetrically with the center line CL of the toilet body 2 in the left-right direction as the center. The second water tank fixing part 66 and the second base plate fixing part 72 are provided on these stepped parts 78. This allows for stable fixing of the water tank assembly 4 and the base plate 40.

[0050] Next, through Figure 7A , Figure 7B and Figure 8 The water tank device 4 of a flush toilet 1 according to one embodiment of the present invention will be described in detail. Figure 7A This is a perspective view of the water tank device of a flush toilet according to one embodiment of the present invention, viewed from a slightly above left side. Figure 7B This is a perspective view of the water tank device of a flush toilet according to one embodiment of the present invention, viewed from a slightly above right side. Figure 8 This is a bottom view of the water tank device of a flush toilet according to one embodiment of the present invention.

[0051] like Figure 7A and Figure 7BAs 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 water tank section 80, which is located closer to the right side than the center line CL; a second water tank section 82, which is located closer to the left side than the center line CL; and a connecting section 84 connecting the first water tank section 80 and the second water tank section 82.

[0052] The capacity (volume) of the second water tank section 82 is set to be smaller than that of the first water tank section 80. The upper wall 82a of the second water tank section 82 is set to be lower than the upper wall 80a of the first water tank section 80. The vertical height of the second water tank section 82 is set to be smaller than that of the first water tank section 80, and the longitudinal length of the second water tank section 82 is set to be smaller than that of the first water tank section 80. Therefore, a pump device 34 and other functional devices, as well as a base plate 40, can be arranged in the rear region A of the second water tank section 82.

[0053] An inflow pipe 80b extending vertically is formed on the upper wall 80a of the first water tank section 80, through which cleaning water from the water supply source flows into the water tank. Additionally, a float switch 48 for detecting the water level of the cleaning water stored in the water tank is fixed to the upper wall 80a of the first water tank section 80. Furthermore, an overflow pipe 80c is fixed to the upper wall 80a of the first water tank section 80, which, for example, discharges the cleaning water out of the water tank when the float switch 48 malfunctions but the water supply to the tank continues. The overflow pipe 80c is connected to an overflow unit 62, through which the cleaning water discharged from the overflow pipe 80c is discharged into a drain connector 30.

[0054] An outflow pipe 82c extending in the front-rear direction is formed on the rear wall 82b of the second water tank section 82. The outflow pipe 82c is connected to the upstream connecting pipe 54 to supply cleaning water from the water tank to the pump device 34. The upper wall 84a of the connecting section 84 is set lower than the upper wall 82a of the second water tank section 82. In addition, the upper wall 84a of the connecting section 84 is formed in a concave shape facing downward. A jet guide water passage 28 is arranged on this concave upper wall 84a.

[0055] like Figure 7A and Figure 7B As shown, the water tank 42 of the water tank device 4 includes an upper water tank component 86 and a lower water tank component 88 that engages with the upper water tank component 86, and is formed by the engagement of the upper water tank component 86 and the lower water tank component 88. The engagement portion of the upper water tank component 86 and the lower water tank component 88 is connected in such a way that no leakage of cleaning water occurs.

[0056] like Figure 8As shown, the lower tank component 88 is formed in an L-shape. When viewed from below, a mounting portion extending outwards from the outer periphery of the upper tank component 86 is formed on the lower tank component 88. This mounting portion includes a first mounting portion 88a on the front right side, a second mounting portion 88b on the rear right side, and a third mounting portion 88c on the front left side. The first mounting portion 88a, the second mounting portion 88b, and the third mounting portion 88c of the lower tank component 88 are positioned corresponding to the first tank fixing portion 64, the second tank fixing portion 66, and the third tank fixing portion 68 of the toilet body 2, respectively. A through hole for inserting a fixing member 50 is formed in each mounting portion of the lower tank component 88. By inserting the fixing member 50 into the through hole, the tank device 4 is fixed to the toilet body 2.

[0057] A temporary fixing part 88d is provided on the lower water tank component 88 for temporarily fixing the water tank device 4 to the base plate 40. The temporary fixing part 88d of the water tank device 4 engages with the temporary fixing part 40c of the base plate 40. The temporary fixing part 88d is used for positioning when fixing the water tank device 4 and the base plate 40.

[0058] Next, through Figure 9 and Figure 10 The base plate 40 of a flush toilet 1 according to one embodiment of the present invention will be described in detail. Figure 9 This is a perspective view of the base plate of a flush toilet according to one embodiment of the present invention. Figure 10 This is a bottom view of the base plate of a flush toilet according to one embodiment of the present invention.

[0059] like Figure 9 and Figure 10 As shown, the base plate 40 is formed from a rectangular resin plate. When viewed from below, a mounting portion extending outwards from the outer periphery of the base plate 40 is formed on the base plate 40. This mounting portion includes a first mounting portion 40a on the left front and a second mounting portion 40b on the left rear. The first mounting portion 40a and the second mounting portion 40b of the base plate 40 are positioned corresponding to the first base plate fixing portion 70 and the second base plate fixing portion 72 of the toilet body 2, respectively. A through hole for inserting a fixing member 50 is formed in each mounting portion of the base plate 40. By inserting the fixing member 50 into the through hole, the base plate 40 is fixed to the toilet body 2.

[0060] The base plate 40 is provided with a temporary fixing part 40c for temporarily fixing the base plate 40 to the water tank device 4. The temporary fixing part 40c of the base plate 40 engages with the temporary fixing part 88d of the water tank device 4. The temporary fixing part 40c of the base plate 40 is used for positioning when fixing the water tank device 4 and the base plate 40. The temporary fixing part 40c of the base plate 40 is positioned corresponding to the temporary fixing part 88d of the lower water tank member 88. The temporary fixing part 40c of the base plate 40 overlaps with the temporary fixing part 88d of the lower water tank member 88 from above, and the base plate 40 is supported by the lower water tank member 88.

[0061] On the top surface of the base plate 40, a pump mounting portion 40d extending upwards for mounting the pump assembly 34 is provided. Additionally, on the top surface of the base plate 40, a water supply valve mounting portion 40e extending upwards for mounting the water supply valve assembly 32 is provided. Furthermore, a through hole 40f through which the water supply pipe 10 passes is formed in the base plate 40.

[0062] Next, through Figures 11 to 13 The positional relationship of the toilet body 2, the water tank device 4, and the base plate 40 of a flush toilet according to one embodiment of the present invention will be described in detail. Figure 11 This is a bottom view showing the water tank assembly and base plate installed in a flush toilet according to one embodiment of the present invention. Figure 12 It is along Figure 11 An enlarged sectional view observed along line XII-XII. Figure 13 It is along Figure 11 An enlarged cross-sectional view observed along line XIII-XIII.

[0063] like Figure 11 As shown, the water tank assembly 4 and the base plate 40 are fixed to cover the lower opening 2a of the toilet body 2. The first water tank fixing part 64 and the first mounting part 88a of the lower water tank member 88 are positioned closer to the right and in the front position compared to the center line CL of the toilet body 2. Furthermore, the second water tank fixing part 66 and the second mounting part 88b of the lower water tank member 88 are positioned closer to the right and in the rear position compared to the center line CL. Moreover, the third water tank fixing part 68, the first base plate fixing part 70, the third mounting part 88c of the lower water tank member 88, and the first mounting part 40a of the base plate 40 are positioned closer to the left and in the front position compared to the center line CL. Additionally, the second base plate fixing part 72 and the second mounting part 40b of the base plate 40 are positioned closer to the left and in the rear position compared to the center line CL.

[0064] The water tank assembly 4 is fixed to the toilet body 2 by the first water tank fixing part 64, the second water tank fixing part 66, and the third water tank fixing part 68. When viewed from below, the first water tank fixing part 64, the second water tank fixing part 66, and the third water tank fixing part 68 are arranged such that the center of gravity G1 of the water tank assembly is located inside the imaginary line V connecting the first water tank fixing part 64, the second water tank fixing part 66, and the third water tank fixing part 68. This stably fixes the water tank assembly 4. In one embodiment of the flush toilet 1 according to the present invention, the water tank assembly 4 is fixed to the toilet body 2 by three fixing parts, but this is not a limitation; it can also be fixed by two or four or more fixing parts.

[0065] The base plate 40 is fixed to the toilet body 2 by the first base plate fixing part 70 and the second base plate fixing part 72. Additionally, the temporary fixing part 40c of the base plate 40 engages with the temporary fixing part 88d of the lower tank member 88, and the lower tank member 88 supports the base plate 40. In one embodiment of the flush toilet 1 of the present invention, the base plate 40 is fixed to the toilet body 2 by two base plate fixing parts, but this is not a limitation; it can also be fixed by three or more base plate fixing parts. In this case, it is preferable that the base plate fixing parts are arranged such that the center of gravity of the base plate is located inside the imaginary line connecting the base plate fixing parts.

[0066] The third tank fixing part 68 and the first base plate fixing part 70 of the toilet body 2 are shared. Therefore, the third mounting part 88c of the lower tank member 88 and the first mounting part 40a of the base plate 40 can be fixed together by a single fixing member 50. Each fixing part (64, 66, 72) of the toilet body 2, except for the third tank fixing part 68 and the first base plate fixing part 70, is formed independently. In particular, the first tank fixing part 64, which is closest to the center of gravity G1 of the tank assembly 4, and the base plate fixing part are formed separately. This allows for stable fixing of the tank assembly 4. Furthermore, the second base plate fixing part 72, which is closest to the center of gravity G2 of the base plate 40, and the tank fixing part are formed separately. This allows for stable fixing of the base plate 40.

[0067] like Figure 12As shown, the first mounting portion 88a of the lower water tank component 88 is fixed to the first water tank fixing portion 64 by the fixing member 50. The fixing member 50 includes: a rubber bushing 50a, which is inserted into the hollow portion 74 through the fixing hole of the first water tank fixing portion 64; a nut 50b, which is embedded in the rubber bushing 50a; a bolt 50c, which is screwed onto the nut 50b; and a washer 50d, which abuts against the surface of the lower water tank component 88 after the bolt 50c is tightened. If the bolt 50c is tightened, the nut 50b is pulled downward, and the rubber bushing 50a undergoes elastic deformation and presses against the back of the first water tank fixing portion 64. Thus, the first mounting portion 88a of the lower water tank component 88 is fixed to the first water tank fixing portion 64. Furthermore, the fixing structure based on the fixing member 50 is the same even in the fixing portions of other toilet bodies 2.

[0068] like Figure 13 As shown, in the third tank fixing part 68 (first base plate fixing part 70) of the toilet body 2, the third mounting part 88c of the lower tank member 88 and the first mounting part 40a of the base plate 40 are fixed together by fixing members 50. The first mounting part 40a of the base plate 40 is fixed at a position closer to the top than the third mounting part 88c of the lower tank member 88. Thus, the base plate 40 is supported by the tank assembly 4.

[0069] The following describes the effects of the flush toilet 1 according to one of the above embodiments. First, according to one embodiment of the present invention, the flush toilet 1 has the following features: a hollow portion 74, the interior of which is formed by a closed space; and a first water tank fixing portion 64, a second water tank fixing portion 66, and a third water tank fixing portion 68. The water tank device 4 is fixed by a fixing member 50. Each water tank fixing portion is provided in the hollow portion 74, thereby expanding the space S inside the toilet body 2 and stably fixing the water tank device 4 to the toilet body 2.

[0070] Furthermore, according to one embodiment of the present invention, the flush toilet 1 can expand the space S inside the toilet body 2 because the first water tank fixing part 64, the second water tank fixing part 66 and the third water tank fixing part 68 are provided on the skirt part 16.

[0071] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has an upwardly recessed step 78 formed on the bottom surface of the toilet body 2, and the second water tank fixing part 66 is provided on the step 78, so the water tank device 4 can be stably fixed to the toilet body 2.

[0072] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has a wall fixing part 76 for fixing the toilet body 2 to the wall W, and a second water tank fixing part 66 is provided in the wall fixing part 76, thus expanding the space S inside the toilet body 2.

[0073] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has three or more first tank fixing parts 64, second tank fixing parts 66 and third tank fixing parts 68. When viewed from below, each tank fixing part is arranged such that the center of gravity of the tank device 4 is located inside the imaginary line V connecting the first tank fixing parts 64, the second tank fixing parts 66 and the third tank fixing parts 68. Therefore, the tank device 4 can be stably fixed to the toilet body 2.

[0074] Furthermore, according to one embodiment of the present invention, the flush toilet 1 is composed of an upper water tank member 86 and a lower water tank member 88 that engages with the upper water tank member 86. The lower water tank member 88 is fixed to each water tank fixing part. Therefore, compared with the case where the upper water tank member 86 is fixed to each water tank fixing part, the upper water tank member 86 and the lower water tank member 88 can be stably engaged.

[0075] Furthermore, the flush toilet 1 according to one embodiment of the present invention has: a functional device for supplying flushing water to the toilet body 2; a base plate 40 for supporting the functional device; and a fixing member 50 for fixing the base plate 40 to the toilet body 2. The toilet body 2 has a first base plate fixing part 70 and a second base plate fixing part 72 for fixing the base plate 40 by the fixing member 50. The first base plate fixing part 70 and the second base plate fixing part 72 are provided in the hollow part 74. Therefore, the space S inside the toilet body 2 can be expanded, and the base plate 40 can be stably fixed to the toilet body 2.

[0076] Furthermore, according to one embodiment of the present invention, the flush toilet 1 can expand the space S inside the toilet body 2 because the first base plate fixing part 70 and the second base plate fixing part 72 are provided on the skirt part 16.

[0077] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has an upwardly recessed step 78 formed on the bottom surface of the toilet body 2, and the second base plate fixing part 72 is provided on the step 78, so the base plate 40 can be stably fixed to the toilet body 2.

[0078] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has a wall fixing part 76 for fixing the toilet body 2 to the wall surface W, and a second base plate fixing part 72 is provided in the wall fixing part 76, thus expanding the space S inside the toilet body 2.

[0079] Furthermore, in a flush toilet 1 according to an embodiment of the present invention, since the third tank fixing part 68 and the first base plate fixing part 70 are shared, the space S inside the toilet body 2 can be expanded. In addition, the tank assembly and the base plate can be easily fixed to the toilet body.

[0080] Furthermore, in a flush toilet 1 according to an embodiment of the present invention, since the first water tank fixing part 64, which is closest to the center of gravity of the water tank device 4, and the second base plate fixing part 72, which is the first base plate fixing part 70, are respectively formed, the water tank device 4 can be stably fixed to the toilet body 2.

[0081] Furthermore, in a modified example of the flush toilet 1 according to an embodiment of the present invention, since the fixing part closest to the center of gravity of the base plate 40 and the water tank fixing part in the base plate fixing part are respectively formed, the base plate 40 can be stably fixed to the toilet body 2.

[0082] Furthermore, according to one embodiment of the present invention, the flush toilet 1 has an L-shaped water tank device 4 and a rectangular base plate 40 when viewed from below, thus covering the lower opening 2a of the toilet body 2.

[0083] According to other embodiments of the present invention, the flush toilet has three or more base plate fixing parts. When viewed from below, the base plate fixing parts are arranged such that the center of gravity of the base plate 40 is located inside the imaginary line connecting the base plate fixing parts, thus the base plate 40 can be stably fixed to the toilet body 2.

[0084] 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, that stores cleaning water to be supplied to the toilet body; and a fixing member that fixes the tank device to the toilet body, characterized in that the toilet body has: a hollow portion whose inside is formed by a closed space; and a tank fixing portion that fixes the tank device by the fixing member, the tank fixing portion is provided to the hollow portion. The tank fixing portion is provided to the skirt portion. A step portion that is recessed upward is formed on a bottom surface of the toilet body, and the tank fixing portion is provided to the step portion.

4. The flush toilet according to any one of claims 1 to 3, characterized in that a wall fixing portion that fixes the toilet body to a wall surface is provided, and the tank fixing portion is provided to the wall fixing portion.

5. The flush toilet according to any one of claims 1 to 3, characterized in that three or more tank fixing portions are provided, and when viewed from below, the tank fixing portions are disposed in such a manner that a center of gravity of the tank device is located inside an imaginary line that connects the tank fixing portions.

2. A flushing toilet according to claim 1, characterised in that 6. The flush toilet according to claim 1, characterized in that the tank device is composed of an upper tank member and a lower tank member that is engaged with the upper tank member, and the lower tank member is fixed to the tank fixing portion.

3. A flushing toilet according to claim 2, characterised in that 7. The flush toilet according to claim 1, characterized in that a function device that supplies cleaning water to the toilet body is provided, a base plate that supports the function device is provided, and a fixing member that fixes the base plate to the toilet body is provided, the toilet body has a base plate fixing portion that fixes the base plate by the fixing member, and the base plate fixing portion is provided to the hollow portion. The base plate fixing portion is provided to the skirt portion. A step portion that is recessed upward is formed on a bottom surface of the toilet body, and the base plate fixing portion is provided to the step portion.

10. The flush toilet according to any one of claims 7 to 9, characterized in that a wall fixing portion that fixes the toilet body to a wall surface is provided, and the base plate fixing portion is provided to the wall fixing portion.

11. The flush toilet according to any one of claims 7 to 9, characterized in that three or more base plate fixing portions are provided, and when viewed from below, the base plate fixing portions are disposed in such a manner that a center of gravity of the base plate is located inside an imaginary line that connects the base plate fixing portions. The tank fixing portion and the base plate fixing portion are formed so as to share at least one. A fixing portion that is closest to a center of gravity of the tank device among the tank fixing portions and the base plate fixing portion are formed separately. A fixing portion that is closest to a center of gravity of the base plate among the base plate fixing portions and the tank fixing portion are formed separately. ​ ​ ​ ​ ​ ​ ​ ​ 8. A flushing toilet according to claim 7, characterised in that ​ 9. A flushing toilet according to claim 8, characterised in that ​ ​ ​ ​ ​ ​ ​ 12. A flushing toilet according to claim 7, characterised in that ​ 13. A flushing toilet according to claim 12, characterised in that ​ 14. A flushing toilet according to claim 12 or 13, characterised in that ​ 15. The flush toilet according to claim 7, characterized in that When viewed from the bottom, the water tank device is formed in an L shape, and the base plate is formed in a rectangular shape.

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