Water-washable toilet

Abstract

The present invention aims to provide a flush toilet that can house the tank device within the toilet bowl body while ensuring sufficient capacity for the tank device. [Solution] The present invention relates to a wall-mounted flush toilet 1, comprising: a toilet body 2 having a bowl portion 12, a drain trap pipe 14, and a skirt portion 16 surrounding the bowl portion 12 and the drain trap pipe 14 from the outside; a tank device 4 arranged in the space S below the bowl portion 12 inside the toilet body 2 for storing flushing water supplied to the toilet body 2; and a functional device for supplying flushing water to the toilet body, wherein the tank device 4 comprises, in a top view, a first tank portion 70 located to one side of the left-right center of the toilet body 2, and a second tank portion 72 located to the other side of the left-right center of the toilet body 2, and the length of the second tank portion 72 in the front-rear direction is set to be half or less of the length of the first tank portion 70 in the front-rear direction.

Description

Technical Field

[0001] The present invention relates to a flushing toilet, and particularly to a wall-mounted flushing toilet.

Background Art

[0002] Conventionally, as described in Patent Documents 1 to 3, as a wall-mounted flushing toilet fixed to a wall surface, a water storage tank for storing the washing water supplied to the toilet body is housed in the space below the bowl portion in the toilet body. Such a flushing toilet has many functional devices in the toilet body, such as a pump device for supplying the washing water from the water storage tank to the toilet body and a control device for driving the pump device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a wall-mounted flushing toilet such as Patent Documents 1 to 3, it is conceivable to shorten the vertical height dimension of the toilet body to achieve a low-sill design. However, when a wall-mounted flushing toilet such as Patent Documents 1 to 3 is designed with a low-sill design, the space inside the toilet body becomes narrow, so that the water storage tank interferes with the functional devices, and there is a problem that the water storage tank cannot be housed in the toilet body.

[0005] Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a flush toilet in which the tank device can be housed inside the toilet bowl body while ensuring the capacity of the tank device. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a wall-mounted flush toilet, comprising: a toilet body comprising a bowl portion for receiving waste, a drain trap pipe connected below the bowl portion for discharging waste, and a skirt portion surrounding the bowl portion and the drain trap pipe from the outside; a tank device disposed in the space below the bowl portion 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, wherein the tank device comprises, in a top view, a first tank portion located to one side of the left-right center of the toilet body, and a second tank portion located to the other side of the left-right center of the toilet body, and the length of the second tank portion in the front-rear direction is set to be half or less of the length of the first tank portion in the front-rear direction. In the present invention configured as described above, the tank device comprises, in a top view, a first tank section located to one side of the left-right center of the toilet body, and a second tank section located to the other side of the left-right center of the toilet body. Since the length of the second tank section in the front-rear direction is set to be less than half the length of the first tank section in the front-rear direction, the functional device can be housed in the rear area of ​​the second tank section, and the tank device and functional device can be compactly housed in the space inside the toilet body. This makes it possible to house the tank device inside the toilet body while ensuring the capacity of the tank device.

[0007] In the present invention, preferably, the tank device includes a connecting portion that connects the first tank section and the second tank section, and the connecting portion is located in the center of the bowl section in the front-to-back direction when viewed from above. In the present invention configured in this way, the tank device includes a connecting part that connects the first tank section and the second tank section, and the connecting part is located in the center of the bowl section in the front-to-back direction when viewed from above. Therefore, compared to the case where the connecting part is located in front of the bowl section, the shape of the front skirt section of the toilet body can be freely designed.

[0008] Furthermore, in the present invention, preferably, a jet outlet is provided below the bowl portion for discharging cleaning water toward the inlet of the drain trap pipe, and a jet water channel is provided for supplying cleaning water to the jet outlet, and the upper wall of the connecting portion is formed in a concave shape, and the jet water channel is arranged on this concave upper wall. In the present invention configured as described above, the system includes a jet outlet located below the bowl section that discharges cleaning water toward the inlet of the drain trap pipe, and a jet water channel that supplies cleaning water to the jet outlet. The upper wall of the connecting section is formed in a concave shape, and the jet water channel is arranged on this concave upper wall, so that the tank device does not interfere with the jet water channel.

[0009] In the present invention, preferably, the upper wall of the second tank section is set to be lower than the upper wall of the first tank section. In the present invention configured in this way, the upper wall of the second tank section is set to be lower than the upper wall of the first tank section, thereby reducing the space in which air stagnates within the second tank section and making the tank device more compact.

[0010] Furthermore, in the present invention, preferably, the water level at the shut-off point of the first tank is set to be higher than the water level at the shut-off point of the second tank. In the present invention configured in this way, the water level at which the first tank is stopped is set to be higher than the water level at which the second tank is stopped, so that a large amount of cleaning water can be stored even if the tank device is made compact.

[0011] In the present invention, preferably, the functional device is a pump device that pressurizes the flushing water stored in the tank device and sends it to the toilet bowl body. In the present invention configured in this way, the functional device is a pump device that pressurizes the flushing water stored in the tank device and sends it to the toilet bowl body. Therefore, the tank device and the pump device can be compactly housed within the space inside the toilet bowl body.

[0012] Furthermore, in the present invention, preferably, a jet nozzle is provided below the bowl portion for discharging cleaning water toward the inlet of the drain trap pipe, a jet water channel for supplying cleaning water to the jet nozzle, and a jet water supply pipe connecting the jet water channel and the pump device, wherein the pump device and the jet water supply pipe are housed in the space behind the second tank portion inside the toilet bowl body. In the present invention configured as described above, the toilet includes a jet outlet located below the bowl portion that discharges cleaning water toward the inlet of the drain trap pipe, a jet water channel that supplies cleaning water to the jet outlet, and a jet water supply pipe that connects the jet water channel to the pump device. Since the pump device and the jet water supply pipe are housed in the space behind the second tank portion inside the toilet body, the tank device, pump device, and jet water supply pipe can be compactly housed in the space inside the toilet body.

[0013] In the present invention, preferably, the toilet bowl is provided with a rim outlet located on the rim of the bowl for discharging cleaning water, a rim water channel for supplying cleaning water to the rim outlet, and a rim water supply pipe connecting the rim water channel to a pump device, wherein the pump device and the rim water supply pipe are housed in the space behind the second tank section inside the toilet bowl body. In the present invention configured as described above, the toilet bowl is equipped with a rim outlet located on the rim of the bowl for discharging flushing water, a rim water channel for supplying flushing water to the rim outlet, and a rim water supply pipe connecting the rim water channel to the pump device. Since the pump device and the rim water supply pipe are housed in the space behind the second tank section inside the toilet bowl body, the tank device, pump device, and rim water supply pipe can be compactly housed within the space inside the toilet bowl body.

[0014] Furthermore, in the present invention, the pump device is preferably located near the second tank section. In the present invention configured in this way, the pump device is located near the second tank section, so the tank device and the pump device can be compactly housed within the space inside the toilet bowl.

[0015] In the present invention, preferably, the second tank section is provided with an outlet pipeline for discharging the cleaning water stored in the tank device, and the outlet of this outlet pipeline is positioned opposite the inlet of the pump device. In the present invention configured in this way, the second tank section is provided with an outlet pipeline for discharging the cleaning water stored in the tank device, and the outlet of this outlet pipeline is positioned opposite the inlet of the pump device, so that the connection between the tank device and the pump device can be made compact.

[0016] Furthermore, in the present invention, preferably, the inlet of the outlet pipe of the second tank section is open downwards. In the present invention configured in this way, the inlet of the outflow pipe of the second tank section opens downwards, which allows the dead water level of the cleaning water inside the tank device to be lowered and makes the tank device more compact.

[0017] In the present invention, preferably, the tank device comprises a cross-sectional area reduction section in which the horizontal cross-sectional area of ​​the tank device decreases upward, and a float switch for detecting the water level of the cleaning water stored in the tank device, wherein the float switch is located in the cross-sectional area reduction section. In the present invention configured as described above, the tank device comprises a cross-sectional area reduction section in which the horizontal cross-sectional area of ​​the tank device decreases upward, and a float switch for detecting the water level of the cleaning water stored in the tank device. Since the float switch is located in the cross-sectional area reduction section, the rate at which the water level rises within the cross-sectional area reduction section can be increased to activate the float switch, thereby improving the accuracy of the float switch's detection of the water level. [Effects of the Invention]

[0018] According to the flush toilet of the present invention, while ensuring the capacity of the tank device, the tank device can be accommodated in the toilet body.

Brief Description of the Drawings

[0019] [Figure 1] It is a perspective view showing the flush toilet according to the first embodiment of the present invention. [Figure 2] It is a top view of the flush toilet according to the first embodiment of the present invention with the sanitary cleaning device removed. [Figure 3] It is a side cross-sectional view taken along line III-III of FIG. 2. [Figure 4A] It is a perspective view of the functional device of the flush toilet according to the first embodiment of the present invention as seen from the upper left obliquely. [Figure 4B] It is a perspective view of the functional device of the flush toilet according to the first embodiment of the present invention as seen from the upper right obliquely. [Figure 5] It is a configuration diagram showing the water supply path through which the cleaning water of the flush toilet according to the first embodiment of the present invention flows. [Figure 6A] It is a perspective view of the tank device of the flush toilet according to the first embodiment of the present invention as seen from the upper left obliquely. [Figure 6B] It is a perspective view of the tank device of the flush toilet according to the first embodiment of the present invention as seen from the upper right obliquely. [Figure 7] It is a side cross-sectional view taken along line VII-VII of FIG. 6A. [Figure 8] It is a side cross-sectional view taken along line VIII-VIII of FIG. 6A. [Figure 9] It is a front cross-sectional view taken along line IX-IX of FIG. 6A. [Figure 10] It is a top view showing the positional relationship between the toilet body and the tank device of the flush toilet according to the first embodiment of the present invention. [Figure 11] It is a side cross-sectional view showing the arrangement of the functional device of the flush toilet according to the first embodiment of the present invention. [Figure 12]This is a perspective view of the tank device of a flush toilet according to a second embodiment of the present invention, viewed from the upper left at an angle. [Figure 13] This is a top view showing the positional relationship between the toilet bowl body and the tank device of a flush toilet according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0020] Hereinafter, a flush toilet 1 according to the first embodiment of the present invention will be described with reference to the attached drawings. First, the basic structure of the flush toilet 1 according to the first embodiment of the present invention will be explained with reference to Figures 1 to 3. Figure 1 is a perspective view showing a flush toilet according to the first embodiment of the present invention, Figure 2 is a top view of the flush toilet according to the first embodiment of the present invention with the sanitary cleaning device removed, and Figure 3 is a side cross-sectional view taken along line III-III in Figure 2. In Figure 2, the rim water channel, jet water channel, and jet water supply pipe are indicated by dotted lines. In this specification, when viewing a flush toilet from the front, the front side is referred to as "front," the back side as "rear," the left side as "left," and the right side as "right."

[0021] As shown in Figure 1, the flush toilet 1 according to the first embodiment of the present invention is a wall-mounted flush toilet whose back surface is fixed to a wall W. The flush toilet 1 comprises a ceramic toilet body 2, a tank device 4 for storing flushing water supplied to the toilet body 2, and a sanitary washing device 6 placed on the upper surface of the toilet body 2. The wall W is provided with a shut-off valve 8 for supplying or stopping the flow of flushing water from a water source (not shown), such as a water tap, to the flush toilet 1. This shut-off valve 8 is connected to the flush toilet 1 via a water supply pipe 10.

[0022] As shown in Figures 2 and 3, the toilet bowl body 2 has a bowl portion 12 for receiving waste, a drain trap pipe 14 connected below the bowl portion 12 for discharging waste, and a skirt portion 16 that surrounds the bowl portion 12 and the drain trap pipe 14 from the outside. A space S is formed inside the toilet bowl body 2 between the bowl portion 12 and the drain trap pipe 14 and the skirt portion 16.

[0023] The bowl portion 12 comprises a bowl-shaped waste receiving surface 18 and a rim portion 20 formed along the upper edge of the bowl portion 12. Water is formed inside the bowl portion 12.

[0024] The rim portion 20 has a rim outlet 22 for discharging cleaning water towards the rear, and a rim water channel 24 for guiding the cleaning water to the rim outlet 22. The rim outlet 22 is located near the center in the front-to-back direction on the right side of the bowl portion 12. The cleaning water discharged from the rim outlet 22 flows down the waste receiving surface 18 while swirling along the inner circumferential surface of the rim portion 20, cleaning the bowl portion 12.

[0025] Below the bowl section 12, a jet outlet 26 is formed, which discharges cleaning water toward the inlet 14a of the drain trap pipe 14, and a jet water channel 28 is formed, which supplies cleaning water to the jet outlet 26. The jet outlet 26 is positioned opposite the inlet 14a of the drain trap pipe 14. The cleaning water discharged from the jet outlet 26 flows into the drain trap pipe 14 to activate a siphon effect.

[0026] The flush toilet 1 according to the first embodiment of the present invention is a siphon jet type flush toilet that discharges waste by generating a siphon action with a jet of water. However, the invention is not limited to this form, and other forms may include, for example, a wash-down type flush toilet that washes away waste with the flowing water action caused by the difference in water pressure, or a siphon type flush toilet that discharges waste by generating a siphon action solely with water discharged from the rim.

[0027] The drain trap pipe 14 comprises an inlet 14a connected to the bottom of the bowl section 12, an upward pipe 14b extending upward from the inlet 14a, a top 14c located at the highest point of the upward pipe 14b that defines the water level, and a rear pipe 14d extending almost horizontally backward from this top 14c. The rear pipe 14d of the drain trap pipe 14 is connected to a drain pipe (not shown) inside the wall W via a drain socket 30.

[0028] The sanitary washing device 6 comprises a main body (not shown), a washing nozzle (not shown) that is movable forward and backward from the main body, a toilet seat (not shown) that is rotatably attached to the main body, and a toilet seat cover that is rotatably attached to the main body so as to cover the toilet seat. The water supply pipe 10 connected to the shut-off valve 8 is connected to the main body of the sanitary washing device 6 and supplies washing water to be sprayed from the washing nozzle.

[0029] As shown in Figures 2 and 3, a space S is formed within the toilet bowl body 2 between the bowl portion 12 and the drain trap pipe 14 and the skirt portion 16. The tank device 4 is housed in the space S surrounded by the skirt portion 16 below the bowl portion 12 within the toilet bowl body 2. Functional devices for supplying flushing water to the toilet bowl body are housed in the space S behind the bowl portion 12 within the toilet bowl body 2. These functional devices include, 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 in the lower opening 2a surrounded by the skirt portion 16 of the toilet bowl body 2, and the above-mentioned functional devices are supported by this base plate 40.

[0030] Next, the tank device 4, functional device, and base plate 40 housed in the space S within the toilet bowl body 2 will be described with reference to Figures 4A and 4B. Figure 4A is a perspective view of the functional device of a flush toilet according to the first embodiment of the present invention, viewed from the upper left, and Figure 4B is a perspective view of the functional device of a flush toilet according to the first embodiment of the present invention, viewed from the upper right, at an angle. In Figure 4A, the direction of the flow of flushing water is indicated by an arrow.

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

[0032] The water storage tank 42 is formed in an L-shape when viewed from above, extending forward to the right of the drain trap pipe 14, then bending and extending to the left. The water storage tank 42 is a resin tank that stores cleaning water used for rim discharge and jet discharge, and can store approximately 4 liters of cleaning water.

[0033] The tank water supply unit 46 is located on top of the water storage tank 42. The upstream side of the tank water supply unit 46 is connected to the tank water supply pipe 44, and the downstream side of the tank water supply unit 46 is connected to the water storage tank 42. Inside the tank water supply unit 46, a flow path is formed to guide the cleaning water from the tank water supply pipe 44 towards the water storage tank 42.

[0034] The float switch 48 is located above the water storage tank 42. The float switch 48 turns off when the water level in the tank falls below the shut-off level (full water level), opening the water supply valve device 32. Conversely, the float switch 48 turns on when the water level in the tank rises to the shut-off level, closing the water supply valve device 32.

[0035] The water storage tank 42 is equipped with an overflow unit 62 for draining cleaning water outside the tank in the event that, for example, the float switch 48 malfunctions and the tank continues to supply water. The overflow unit 62 is connected to a drain socket 30, so that cleaning water overflowing from the water storage tank 42 is discharged into the drain socket 30 via 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, an on-off valve (not shown) located downstream of the constant flow valve for switching between supplying and shutting off cleaning water, and a solenoid valve (not shown) for driving this on-off valve. The upstream side of the water supply valve device 32 is connected to a water source (not shown) via a stopcock 8 and a water supply pipe 10, while the downstream side of the water supply valve device 32 is connected to the sanitary cleaning device 6 via a water supply pipe 52 for the sanitary cleaning device, and also to the tank device 4 via a water supply pipe 44 for the tank. When the solenoid valve opens electromagnetically, the on-off valve opens, and cleaning water from the water source is supplied to the tank device 4 via the water supply pipe 44 for the tank.

[0037] The pump device 34 is a pressurized pump that draws in the flushing water stored in the tank device 4 and pumps it under pressure to the toilet bowl body 2. The upstream side of the pump device 34 is connected to the tank device 4 via the upstream connecting pipe 54, and the downstream side of the pump device 34 is connected to the switching valve device 36 via the downstream connecting pipe 56. When the pump device 34 is operated, the flushing water stored in the tank device 4 is pumped under pressure and discharged from the rim outlet 22 and the jet outlet 26, thereby flushing the toilet bowl. In the flush toilet 1 according to the first embodiment of the present invention, the flushing water stored in the tank device 4 is supplied to the rim outlet 22 and the jet outlet 26, but the invention is not limited to this configuration, and other configurations are also applicable, for example, a configuration in which all the flushing water stored in the tank device 4 is discharged from the rim outlet 22.

[0038] The switching valve device 36 includes a switching valve body (not shown) and switches the water supply channels that supply cleaning water from the pump device 34 to the rim discharge port 22 and the jet discharge port 26, respectively. The upstream side of the switching valve device 36 is connected to the pump device 34 via a downstream connecting pipe 56, and the downstream side of the switching valve device 36 is connected to the rim water supply channel 24 via a rim water supply pipe 58 and to the jet water supply channel 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 rim discharge port 22, and when the switching valve body is open, cleaning water from the pump device 34 is supplied to both the rim discharge port 22 and the jet discharge port 26.

[0039] The control device 38 is electrically connected to a remote control (not shown), a tank device 4 (float switch 48), a sanitary cleaning device 6, a water supply valve device 32, and a pump device 34, and is capable of sending and receiving various signals. When the control device 38 receives a cleaning start signal for a large or small cleaning from the remote control, it drives or stops the pump device 34 based on a pre-stored cleaning sequence. Specifically, when the user operates the remote control, the control device 38 drives the pump device 34 to discharge the cleaning water stored in the tank device 4 from the rim outlet 22 and the jet outlet 26. The control device 38 also opens the water supply valve device 32 to supply water to the tank, and when the float switch 48 detects that the tank is full, it closes the water supply valve device 32 to stop the tank water supply.

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

[0041] Next, with reference to Figure 5, the water supply channel through which the flushing water of the flush toilet 1 according to the first embodiment of the present invention flows will be described. Figure 5 is a diagram showing the water supply channel through which the flushing water of a flush toilet flows according to the first embodiment of the present invention.

[0042] The water supply channel of the flush toilet 1 is configured, from upstream, with a stopcock 8, a water supply valve device 32, a tank device 4, a pump device 34, and a switching valve device 36. First, flushing water is supplied from the water source to the water supply valve device 32 via the stopcock 8 and the water supply pipe 10. The flushing water supplied to the water supply valve device 32 is supplied to the sanitary flushing device 6 via the sanitary flushing device water supply pipe 52, and also to the tank device 4 via the tank water supply pipe 44. The flushing water stored in the tank device 4 is drawn up by the pump device 34 via the upstream connecting pipe 54 and supplied to the switching valve device 36 via the downstream connecting pipe 56. The flushing water supplied to the switching valve device 36 is discharged from the rim outlet 22 via the rim water supply pipe 58 and the rim water conduit 24, and also discharged from the jet outlet 26 via the jet water supply pipe 60 and the jet water conduit 28. Furthermore, the cleaning water that overflows from the tank device 4 is discharged to the drain socket 30 via the overflow unit 62.

[0043] Next, the tank device 4 of the flush toilet 1 according to the first embodiment of the present invention will be described in detail with reference to Figures 6A to 9. Figure 6A is a perspective view of the tank device of a flush toilet according to the first embodiment of the present invention, viewed from the upper left at an angle; Figure 6B is a perspective view of the tank device of a flush toilet according to the first embodiment of the present invention, viewed from the upper right at an angle; Figure 7 is a side cross-sectional view taken along the line VII-VII in Figure 6A; Figure 8 is a side cross-sectional view taken along the line VIII-VIII in Figure 6A; and Figure 9 is a front cross-sectional view taken along the line IX-IX in Figure 6A.

[0044] As shown in Figures 6A and 6B, the water storage tank 42 of the tank device 4 is formed in an L-shape when viewed from above, and is formed asymmetrically with respect to the center line CL of the toilet bowl body 2 in the left-right direction. The water storage tank 42 comprises a first tank section 70 located to the right of the center line CL, a second tank section 72 located to the left of the center line CL, and a connecting section 74 that connects the first tank section 70 and the second tank section 72. The vertical height dimension of the first tank section 70 is set to be greater than the vertical height dimension of the second tank section 72, and the front-to-back length of the first tank section 70 is set to be greater than the front-to-back length of the second tank section 72. As a result, 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 length of the second tank section 72 in the front-to-rear direction is set to be smaller than the length of the first tank section 70 in the front-to-rear direction, functional devices such as a pump device 34 can be placed in the rear region A of the second tank section 72.

[0045] As shown in Figure 7, the first tank section 70 is configured such that the water level rises to the shut-off water level (full water level) WL1 and then falls to the dead water level WL2. The first tank section 70 includes a constant cross-sectional area section 70a where the horizontal cross-sectional area of ​​the first tank section 70 is formed to be approximately constant, and a reduced cross-sectional area section 70b where the horizontal cross-sectional area of ​​the first tank section 70 decreases upward. The rate at which the water level rises in the reduced cross-sectional area section 70b is faster than the rate at which the water level rises in the constant cross-sectional area section 70a. An inflow pipe 70d extending in the vertical direction is formed in the upper wall 70c of the first tank section 70, and this inflow pipe 70d is connected to the tank water supply unit 46. As a result, cleaning water from the water supply source flows into the tank from the inflow pipe 70d.

[0046] A float switch 48 is fixed to the upper wall 70c of the first tank section 70 to detect the water level of the cleaning water stored in the tank. The float switch 48 is located within the cross-sectional area reduction section 70b of the first tank section 70. The float switch 48 turns off when the water level in the tank falls below the shut-off water level WL1, and turns on when the water level in the tank rises to the shut-off water level WL1.

[0047] The first tank section 70 is equipped with an overflow pipe 70e for discharging cleaning water outside the tank in the event that, for example, the float switch 48 malfunctions and the tank water supply continues. The overflow pipe 70e extends vertically, and its upper end is connected to the overflow unit 62. As a result, the cleaning water discharged from the overflow pipe 70e is discharged into the drain socket 30 via the overflow unit 62.

[0048] As shown in Figure 8, the second tank section 72 is designed so that the water level rises to the shut-off water level (full water level) WL3 and then drops to the dead water level WL4. The shut-off water level WL3 of the second tank section 72 is set to be lower than the shut-off water level WL1 of the first tank section 70, and the dead water level WL4 of the second tank section 72 is set to be the same height as the dead water level WL2 of the first tank section 70 (see Figure 9). The second tank section 72 has a nearly constant horizontal cross-sectional area. The vertical height dimension of the second tank section 72 is set to be about half the vertical height dimension of the constant cross-sectional area section 70a of the first tank section 70, and the upper wall 72a of the second tank section 72 is set to be lower than the upper wall 70c of the first tank section 70. As a result, the space in which air can stagnate within the second tank section 72 is reduced, making the second tank section 72 more compact.

[0049] The length of the second tank section 72 in the front-rear direction is set to be less than half, preferably about one-third, of the length of the first tank section 70 in the front-rear direction. Furthermore, the rear wall 72b of the second tank section 72 is formed on the same plane as the rear wall 74a of the connecting section 74. In this way, since the second tank section 72 is formed to be smaller than the first tank section 70, a rear region A is formed behind the rear wall 72b of the second tank section 72, which is a space where functional devices such as a pump device 34 can be arranged (see Figures 6A and 6B). Furthermore, the length of the rear region A in the front-rear direction is set to be about twice the length of the second tank section 72 in the front-rear direction.

[0050] An outlet pipe 72c extending in the front-rear direction is formed in the rear wall 72b of the second tank section 72. The outlet 72d of the outlet pipe 72c opens towards the rear. The inlet 72e of the outlet pipe 72c opens downward. The outlet 72d of the outlet pipe 72c is connected to the upstream connecting pipe 54, so that the cleaning water in the tank is supplied to the pump device 34. Because the inlet 72e of the outlet pipe 72c opens downward within the second tank section 72, it is possible to lower the dead water levels WL2 and WL4.

[0051] As shown in Figure 9, the connecting section 74 is positioned between the first tank section 70 and the second tank section 72. The vertical height dimension of the connecting section 74 is set to be smaller than the vertical height dimension of the second tank section 72, and the upper wall 74b of the connecting section 74 is set to be lower than the upper wall 72a of the second tank section 72. Furthermore, the upper wall 74b of the connecting section 74 is formed in a concave shape toward downward. The jet water conduit 28 is positioned in this concave upper wall 74b.

[0052] Next, with reference to Figure 10, the positional relationship between the toilet bowl body and the tank device of the first embodiment of the present invention will be described in detail. Figure 10 is a top view showing the positional relationship between the toilet bowl body and the tank device of a flush toilet according to the first embodiment of the present invention. In Figure 10, the toilet bowl body 2 is indicated by a dashed line.

[0053] As shown in Figure 10, the water storage tank 42 of the tank device 4 is located below the bowl portion 12 inside the toilet bowl body 2. The first tank portion 70 of the water storage tank 42 is located to the right of the center line CL in the left-right direction of the toilet bowl body 2, and the second tank portion 72 is located to the left of the center line CL. The connecting portion 74 of the water storage tank 42 is located near the center line CL. The first tank portion 70 and the second tank portion 72 are arranged so as to sandwich the drain trap pipe 14. The connecting portion 74 is also located directly below the jet outlet 26 and the jet water channel 28. The jet water channel 28 is located on the concave upper wall 74b of the connecting portion 74.

[0054] The front end of the water storage tank 42 is located near the center in the front-to-back direction of the bowl portion 12 of the toilet body 2. The left and right ends of the water storage tank 42 are located further out than the left and right ends of the bowl portion 12. The rear end of the first tank portion 70 of the water storage tank 42 is located behind the rear end of the bowl portion 12, and the rear end of the second tank portion 72 is located in front of the rear end of the bowl portion 12. As a result, a space is formed in the rear region A of the second tank portion 72 where functional devices such as a pump device 34 can be placed.

[0055] Next, with reference to Figure 11, the positional relationship between the 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 is a side cross-sectional view showing the arrangement of the functional devices of a flush toilet according to the first embodiment of the present invention.

[0056] As shown in Figure 11, the rear region A of the second tank section 72 of the water storage tank 42 is equipped with functional devices such as a pump device 34, a switching valve device 36, and a control device 38. The pump device 34, the control device 38, and the switching valve device 36 are arranged in a nearly straight line in the vertical direction. In addition, the rear region A of the second tank section 72 is equipped with an upstream connecting pipe 54 connecting the tank device 4 and the pump device 34, a downstream connecting pipe 56 connecting the pump device 34 and the switching valve device 36, a rim water supply pipe 58 connecting the switching valve device 36 and the rim water conduit 24, and a jet water supply pipe 60 connecting the switching valve device 36 and the jet water conduit 28.

[0057] The pump device 34 is positioned near the rear wall 72b of the second tank section 72. The pump device 34 is positioned at approximately the same height as the second tank section 72. The outlet 72d of the outflow pipeline 72c of the second tank section 72 is positioned opposite the inlet 34a of the pump device 34 and at approximately the same height as the inlet 34a of the pump device 34. This allows the upstream connecting pipe 54 connecting the tank device 4 and the pump device 34 to be formed in a straight line, making it compact.

[0058] The control device 38 is fixed to the upper surface of the pump device 34, and the switching valve device 36 is fixed to the upper surface of the control device 38. The downstream connecting pipe 56 connecting the pump device 34 and the switching valve device 36 is located near the control device 38 and is arranged in parallel with the control device 38. In a top view, the pump device 34, the control device 38, and the switching valve device 36 are arranged so that at least a portion of each overlaps with the others. In a top view, the switching valve device 36 is located inside the outer periphery of the pump device 34 and the outer periphery of the control device 38. In a top view, the downstream connecting pipe 56 is located inside the outer periphery of the pump device 34.

[0059] The following describes the operation and effects of the flush toilet 1 according to the first embodiment described above. First, according to the flush toilet 1 according to an embodiment of the present invention, the tank device 4 comprises, in a top view, a first tank section 70 located to one side of the left-right center of the toilet body 2, and a second tank section 72 located to the other side of the left-right center of the toilet body 2. Since the length of the second tank section 72 in the front-rear direction is set to be less than half the length of the first tank section 70 in the front-rear direction, the functional device can be housed in the rear region A of the second tank section 72, and the tank device 4 and the functional device can be compactly housed in the space S inside the toilet body 2. This makes it possible to house the tank device 4 inside the toilet body 2 while ensuring the capacity of the tank device 4.

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

[0061] Furthermore, according to the embodiment of the present invention, the flush toilet 1 includes a jet outlet 26 located below the bowl portion 12 that discharges flushing water toward the inlet 14a of the drain trap pipe 14, and a jet water channel 28 that supplies flushing water to the jet outlet 26. The upper wall 74b of the connecting portion 74 is formed in a concave shape, and the jet water channel 28 is arranged in this concave upper wall 74b, so that the tank device 4 does not interfere with the jet water channel 28.

[0062] Furthermore, according to the flush toilet 1 of the present invention, the upper wall 72a of the second tank section 72 is set to be lower than the upper wall 70c of the first tank section 70, thereby reducing the space in which air stagnates within the second tank section 72 and making the tank device 4 more compact.

[0063] Furthermore, according to the flush toilet 1 of the present invention, the shut-off water level WL1 of the first tank section 70 is set to be higher than the shut-off water level WL3 of the second tank section 72, so that a large amount of flushing water can be stored even if the tank device 4 is made compact.

[0064] Furthermore, according to the flush toilet 1 of the present invention, the functional device is a pump device 34 that pressurizes the flushing water stored in the tank device 4 and sends it to the toilet bowl body 2. Therefore, the tank device 4 and the pump device 34 can be compactly housed in the space S inside the toilet bowl body 2.

[0065] Furthermore, according to the embodiment of the present invention, the flush toilet 1 includes a jet nozzle 26 located below the bowl portion 12 that discharges flushing water toward the inlet 14a of the drain trap pipe 14, a jet water conduit 28 that supplies flushing water to the jet nozzle 26, and a jet water supply pipe 60 that connects the jet water conduit 28 to the pump device 34. Since the pump device 34 and the jet water supply pipe 60 are housed in the space S inside the toilet body 2 behind the second tank portion 72, 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, according to the embodiment of the present invention, the flush toilet 1 includes a rim outlet 22 located in the rim portion 20 of the bowl portion 12 for discharging flushing water, a rim water channel 24 for supplying flushing water to the rim outlet 22, and a rim water supply pipe 58 connecting the rim water channel 24 to the pump device 34. Since the pump device 34 and the rim water supply pipe are housed in the space S behind the second tank portion 72 inside the toilet body 2, the tank device 4, the pump device 34, and the rim water supply pipe 58 can be compactly housed in the space S inside the toilet body 2.

[0067] Furthermore, according to the flush toilet 1 of the present invention, the pump device 34 is located near the second tank section 72, so the 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 flush toilet 1 according to an embodiment of the present invention, the second tank section 72 is provided with an outlet pipe 72c for discharging the flushing water stored in the tank device 4, and the outlet 72d of this outlet pipe 72c is positioned opposite the inlet 34a of the pump device 34, so that the connection between the tank device 4 and the pump device 34 can be made compact.

[0069] Furthermore, according to the flush toilet 1 of the present invention, the inlet of the outflow pipe of the second tank section 72 opens downward, which allows the dead water levels WL2 and WL4 of the flushing water in the tank device 4 to be lowered, and the tank device 4 can be made more compact.

[0070] Furthermore, according to the flush toilet 1 according to an embodiment of the present invention, the tank device 4 includes a cross-sectional area reduction section 70b in which the horizontal cross-sectional area of ​​the tank device 4 is reduced upward, and a float switch 48 for detecting the water level of the flushing water stored in the tank device 4. Since the float switch 48 is located in the cross-sectional area reduction section 70b, the rate at which the water level rises can be increased within the cross-sectional area reduction section 70b to operate the float switch 48, thereby improving the accuracy of the float switch 48 in detecting the water level.

[0071] Next, a flush toilet 100 according to a second embodiment of the present invention will be described with reference to Figures 12 and 13. Except for the shape of the water storage tank, the basic configuration is the same as that of the flush toilet 1 according to the first embodiment of the present invention described above. Hereinafter, only the differences from the flush toilet 1 according to the first embodiment will be described, and similar configurations, operations, and effects will not be explained.

[0072] Figure 12 is a perspective view of the tank device of a flush toilet according to the second embodiment of the present invention, viewed from the upper left, and Figure 13 is a top view showing the positional relationship between the toilet bowl body and the tank device of the flush toilet according to the second embodiment of the present invention. In Figure 13, the toilet bowl body 102 is indicated by a dashed line.

[0073] As shown in Figures 12 and 13, the water storage tank 142 of the tank device 104 is formed in a J-shape when viewed from above, and is formed asymmetrically with respect to the center line CL of the toilet bowl body 102 in the left-right direction. The water storage tank 142 comprises a first tank section 170 located to the right of the center line CL, a second tank section 172 located to the left of the center line CL, and a connecting section 174 that connects the first tank section 170 and the second tank section 172. The length of the connecting section 174 in the front-rear direction is set to be smaller than the length of the second tank section 172 in the front-rear direction.

[0074] According to the second embodiment of the present invention, the length of the connecting portion 174 that connects the first tank portion 170 and the second tank portion 172 in the front-rear direction is set to be smaller than the length of the second tank portion 172 in the front-rear direction, so that the tank device 104 can be made more compact.

[0075] The present invention is not limited to the embodiments described above, and various modifications and variations are possible within the scope of the technical idea described in the claims. [Explanation of symbols]

[0076] 1: Flush toilet according to the first embodiment 2: Toilet bowl 4: Tank equipment 12: Bowl section 14: Drain trap pipe 14a: Inlet of drain trap pipe 16: Skirt section 20: Rim section 22: Rim spout 24: Rim water conduit 26: Jet nozzle 28: Jet water conduit 32: Water supply valve device 34: Pumping equipment 34a: Inlet of the pump device 36: Switching valve device 38: Control device 40: Base plate 42: Water storage tank 44: Water supply pipe for tank 46: Tank water supply unit 48: Float switch 54: Upstream connecting pipe 56: Downstream connecting pipe 58: Rim water supply pipe 60: Water supply pipe for jet 70: First Tank Section 70a: Section of the first tank with a constant cross-sectional area 70b: Section with reduced cross-sectional area of ​​the first tank. 70c: Upper wall of the first tank section 70d: Inlet pipeline for the first tank section 70e: Overflow pipe for the first tank section 72: Second Tank Section 72a: Upper wall of the second tank section 72b: Rear wall of the second tank section 72c: Outlet pipeline for the second tank section 72d: Outlet of the drainage pipeline 72e: Inlet of the outflow pipeline 74:Connection part 74a: Rear wall of the connecting section 74b: Upper wall of the connecting section 100: Flush toilet according to the second embodiment 104: Tank equipment 142: Water storage tank 170: First Tank Section 172: Second Tank Section 174:Connection part S: Space inside the toilet bowl A: The rear area of ​​the second tank section within the toilet bowl body. CL: The center line in the left-right direction of the toilet bowl. W: Wall surface WL1: Water level at the shutoff point of the first tank. WL2: Dead water level in the first tank section WL3: Water level at the shutoff point of the second tank. WL4: Dead water level in the second tank section

Claims

1. It is a wall-mounted flush toilet, A toilet bowl body comprising a bowl portion for receiving waste, a drain trap pipe connected below the bowl portion for discharging waste, and a skirt portion surrounding the bowl portion and the drain trap pipe from the outside, A tank device is provided, which is located in the space below the bowl portion within the toilet body and stores the flushing water supplied to the toilet body. A functional device for supplying flushing water to the toilet bowl body, It has, The above-mentioned tank device comprises, in a top view, a first tank section located to one side of the left-right center of the toilet body, and a second tank section located to the other side of the left-right center of the toilet body. A flush toilet characterized in that the length of the second tank section in the front-to-back direction is set to be half or less of the length of the first tank section in the front-to-back direction.

2. The above-mentioned tank device includes a connecting section that connects the first tank section and the second tank section. The flush toilet according to claim 1, wherein the connecting portion is located in the center of the bowl portion in the front-to-back direction when viewed from above.

3. A jet nozzle is located below the bowl section and discharges cleaning water towards the entrance of the drain trap pipe. A jet water channel that supplies cleaning water to the above-mentioned jet outlet, Equipped with, The flush toilet according to claim 2, wherein the upper wall of the connecting portion is formed in a concave shape, and the jet water channel is arranged in this concave upper wall.

4. The flush toilet according to claim 1, wherein the upper wall of the second tank section is set to be lower than the upper wall of the first tank section.

5. The flush toilet according to claim 4, wherein the shut-off water level of the first tank section is set to be higher than the shut-off water level of the second tank section.

6. The flush toilet according to claim 1, wherein the above-mentioned functional device is a pump device that pressurizes the flushing water stored in the above-mentioned tank device to the toilet bowl body.

7. A jet nozzle is located below the bowl section and discharges cleaning water towards the entrance of the drain trap pipe. A jet water channel that supplies cleaning water to the above-mentioned jet outlet, A jet water supply pipe connecting the above-mentioned jet water channel and the above-mentioned pump device, Equipped with, The flush toilet according to claim 6, wherein the pump device and the water supply pipe for the jet are housed in the space behind the second tank section within the toilet bowl body.

8. The rim of the bowl section is positioned to dispense cleaning water from a rim outlet, A rim water channel that supplies cleaning water to the rim outlet, A rim water supply pipe connecting the rim water channel and the pump device, Equipped with, The flush toilet according to claim 6 or 7, wherein the pump device and the water supply pipe for the rim are housed in the space behind the second tank section within the toilet bowl body.

9. The flush toilet according to claim 6, wherein the pump device is located near the second tank section.

10. The flush toilet according to claim 9, wherein the second tank section is provided with an outlet pipe for discharging the flushing water stored in the tank device, and the outlet of this outlet pipe is positioned opposite the inlet of the pump device.

11. The flush toilet according to claim 10, wherein the inlet of the outflow pipe of the second tank section described above is open downwards.

12. The above-mentioned tank device comprises a cross-sectional area reduction section in which the horizontal cross-sectional area of ​​the tank device decreases upward, and a float switch for detecting the water level of the cleaning water stored in the tank device. The flush toilet according to claim 1, wherein the float switch is located in the section with reduced cross-sectional area.

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