Water-washable toilet

Abstract

To provide a flush toilet that allows for manual flushing during power outages or other emergencies, while still ensuring sufficient design flexibility. [Solution] The present invention provides a flush toilet (1) that can be manually flushed during a power outage, comprising a flush toilet body (2) mounted on a wall surface spaced apart from the floor, a bowl (12) for receiving waste, and a drain trap pipe (14) extending from below the bowl, a flush toilet body (2) provided on the flush toilet body to flush the bowl of the flush toilet body, and a first power outage operation unit (76a) that activates the flush function unit by operation by the user during a power outage, wherein the first power outage operation unit is provided so as to be operable from the bottom surface of the flush toilet body.

Description

Technical Field

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet capable of manually performing toilet cleaning during a power outage.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2021-38635 (Patent Document 1) describes a flush toilet. This flush toilet includes a power outage manual operation unit for manually performing a water supply operation and a drainage operation during a power outage. That is, during a power outage, first, the handle operation unit of the power outage manual water supply operation device is rotated to start water supply to the water storage unit. Further, the ring member for gripping of the power outage manual drainage operation device is operated to close the on-off valve of the drainage socket. By continuing the water supply in this state, after storing the cleaning water in the flow path etc. in the drainage socket, the ring member of the power outage manual drainage operation device is operated to open the on-off valve of the drainage socket, so that the dirt and cleaning water in the bowl portion are discharged and the toilet is cleaned.

[0003] In addition, in the flush toilet described in Patent Document 1, the operation units of the power outage manual water supply operation device and the power outage manual drainage operation device are provided on the rear side surface of the flush toilet, and these operation units are covered by a side cover. And during a power outage, the cover attached to the side is removed to operate each operation unit.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the flush toilet described in Patent Document 1, each control panel must be covered with a removable side cover. For this reason, the structure described in Patent Document 1 cannot be applied to a so-called "full-skirt type" flush toilet, in which the entire flush toilet is covered by a ceramic skirt. Furthermore, there are known flush toilets in which the top surface is covered with a removable cover, and by removing this cover, the control panel for use during power outages becomes operational. In this type of flush toilet as well, the top surface of the flush toilet must be covered with a cover that can be easily removed by the user. Thus, providing a control panel that allows manual flushing during power outages etc. imposes many design constraints, making it difficult to create a flush toilet with a highly aesthetic and superior design.

[0006] Therefore, the present invention aims to provide a flush toilet that allows for manual flushing during power outages or other emergencies while ensuring sufficient design flexibility. [Means for solving the problem]

[0007] To solve the above-mentioned problems, the present invention provides a flush toilet that can be manually flushed during a power outage, comprising: a flush toilet body mounted on a wall surface spaced apart from the floor surface, having a bowl portion for receiving waste and a drain trap pipe extending from below the bowl portion; a flushing function unit provided on the flush toilet body for flushing the bowl portion of the flush toilet body; and a first power outage operation unit that activates the flushing function unit by operation by the user during a power outage, wherein the first power outage operation unit is provided so as to be operable from the bottom surface of the flush toilet body.

[0008] With the present invention configured in this way, the first power outage control unit is provided so that it can be operated from the bottom surface of the toilet bowl body. Therefore, there is no need to provide a removable cover on the side or top surface of the toilet bowl body, and the user can easily operate the first power outage control unit in the event of a power outage. For this reason, a toilet bowl can be configured that allows the user to manually flush the toilet in the event of a power outage without being substantially constrained by design limitations.

[0009] In the present invention, preferably, the first power outage control unit is located on the outer periphery of the bottom surface of the toilet bowl body.

[0010] With the present invention configured in this way, since the first power outage control unit is located on the outer periphery of the bottom surface of the toilet bowl body, a user standing next to the toilet bowl body can easily reach the first power outage control unit with their fingers, and the user can easily operate the first power outage control unit.

[0011] In the present invention, preferably, the first power outage control unit is located below the cleaning function unit.

[0012] With the present invention configured in this way, since the first power outage control unit is located below the cleaning function unit, a mechanism for operating the cleaning function unit using the first power outage control unit can be easily constructed.

[0013] In the present invention, preferably, a second power outage control unit is provided that can be operated from the bottom surface of the toilet bowl body so as to activate the cleaning function unit by the user's operation, and of the first and second power outage control units, the control unit that should be operated first when performing toilet flushing is located on the front side of the toilet bowl body.

[0014] According to the present invention configured in this manner, the toilet further has a second power outage control unit, and of the first and second power outage control units, the control unit that should be operated first when performing toilet flushing is located on the front side of the toilet body. Therefore, the user can intuitively grasp the manual toilet flushing procedure and easily perform toilet flushing.

[0015] In the present invention, preferably, a second power outage control unit is provided that can be operated from the bottom surface of the toilet bowl body so as to activate the flushing function unit by the user's operation, the first power outage control unit and the second power outage control unit are configured such that the flushing function unit is activated when pulled a predetermined distance, and of the first and second power outage control units, the one with the longer stroke required for operation is positioned closer to the outer circumference of the bottom surface of the toilet bowl body.

[0016] According to the present invention configured in this way, the toilet further has a second power outage control unit, and of the first and second power outage control units, the one with the longer stroke required for operation is positioned closer to the outer circumference of the bottom surface of the toilet bowl body. Therefore, the control unit with the longer stroke required for operation is less likely to interfere with the operation of the other control units, and the user can easily perform manual toilet flushing.

[0017] In the present invention, preferably, the toilet further has a bottom cover that covers at least a part of the toilet body, and the first power outage control unit is configured to hang down below the bottom surface of the toilet body when the bottom cover is opened.

[0018] According to the present invention configured in this way, the toilet further has a bottom cover, and when the bottom cover is opened, the first power outage control unit hangs down below the bottom surface of the toilet bowl body. Therefore, when the bottom cover is opened, the user can immediately recognize the presence of the first power outage control unit and perform toilet flushing during a power outage without any confusion.

[0019] In the present invention, preferably, the bottom cover is attached to the toilet body so that it does not separate from the toilet body even when it is open.

[0020] According to the present invention configured as described above, since the bottom cover is attached to the flush toilet body so as not to be separated from the flush toilet body even when it is in an open state, when it is no longer necessary to use the first power failure operation unit, the bottom cover can be easily restored to its original state.

Effect of the Invention

[0021] According to the flush toilet of the present invention, while providing an operation unit that enables manual toilet cleaning during a power failure or the like, it is possible to sufficiently ensure the degree of freedom in design.

Brief Description of the Drawings

[0022] [Figure 1] It is a perspective view showing a flush toilet according to an embodiment of the present invention. [Figure 2] It is a top view of the flush toilet according to the embodiment of the present invention with the sanitary cleaning device removed. [Figure 3] It is a side cross-sectional view of the flush toilet according to the embodiment of the present invention cut 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 embodiment of the present invention viewed obliquely from above on the left side. [Figure 4B] It is a perspective view of the functional device of the flush toilet according to the embodiment of the present invention viewed obliquely from above on the right side. [Figure 5] It is a block diagram showing a water supply path through which the washing water of the flush toilet according to the embodiment of the present invention flows. [Figure 6] In the flush toilet according to the embodiment of the present invention, it is a perspective view showing the drainage socket and the washing water tank taken out. [Figure 7] In the flush toilet according to the embodiment of the present invention, it is a perspective cross-sectional view showing the internal structure by cutting the drainage socket in the front-rear direction of the flush toilet. [Figure 8]This is a perspective cross-sectional view showing the internal structure of a flush toilet according to an embodiment of the present invention, with the drain socket cut in the width direction of the flush toilet. [Figure 9] This is a perspective view of a flush toilet according to an embodiment of the present invention, viewed from a diagonal downward angle. [Figure 10] This is a perspective view showing a configuration for opening and closing a water-retaining valve provided inside the drain socket of a flush toilet according to an embodiment of the present invention. [Figure 11] This is a cross-sectional view of a flushing water tank showing the connection structure between the flushing water tank and the drain socket in a flush toilet according to an embodiment of the present invention. [Figure 12] This is a cross-sectional view showing a flush toilet according to an embodiment of the present invention, in which flushing water is stored in the drain socket in order to perform toilet flushing during a power outage. [Modes for carrying out the invention]

[0023] A flush toilet according to an embodiment of the present invention will be described below with reference to the attached drawings. First, the basic structure of a flush toilet according to an 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 an embodiment of the present invention, Figure 2 is a top view of the flush toilet according to an 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.

[0024] As shown in Figure 1, the flush toilet 1 according to an 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 flush toilet body 2, a tank device 4 for storing flushing water supplied to the flush toilet body 2, and a sanitary flushing device 6 mounted on the upper surface of the flush 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 supply, to the flush toilet 1. This shut-off valve 8 is connected to the flush toilet 1 via a water supply pipe 10.

[0025] 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. The toilet bowl body 2 is mounted on a wall W, spaced apart from the floor. 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.

[0026] 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.

[0027] 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.

[0028] Below the bowl section 12, a jet outlet 26 is formed to discharge cleaning water toward the inlet 14a of the drain trap pipe 14, and a jet water channel 28 is formed to supply 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.

[0029] The flush toilet 1 according to an embodiment of the present invention is a siphon-jet type flush toilet that discharges waste by generating a siphon action through a jet of water. However, it is not limited to this form, and other forms may also be used, 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 through rim water discharge.

[0030] 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.

[0031] 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, which is 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.

[0032] 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. The flushing function unit for supplying flushing water stored in the tank device to the toilet bowl body is housed in the space S behind the bowl portion 12 within the toilet bowl body 2. In this embodiment, the flushing function unit includes, for example, the tank device 4, the water supply valve device 32, the pump device 34, the switching valve device 36, the control device 38, etc. Furthermore, a base plate 40 is provided in the bottom opening 2a surrounded by the skirt portion 16 of the toilet bowl body 2, and the above-mentioned flushing function unit is supported by this base plate 40.

[0033] Next, the tank device 4, the flushing function unit, and the base plate 40 housed in the space S within the toilet bowl body 2 will be explained with reference to Figures 4A and 4B. Figure 4A is a perspective view of the flushing function unit of a flush toilet according to an embodiment of the present invention, viewed from the upper left, and Figure 4B is a perspective view of the flushing function unit of a flush toilet according to an embodiment of the present invention, viewed from the upper right, at an angle. In Figure 4A, the direction of the flow of the flushing water is indicated by an arrow.

[0034] The tank device 4 includes a flush water tank 42 for storing flush water supplied to the toilet bowl body 2, a tank water supply unit 46 for allowing flush water from the tank water supply pipe 44 to flow into the flush water tank 42, a float switch 48 for detecting the water level of the flush water stored in the flush water tank 42, and a fixing member 50 for fixing the tank device 4 to the bottom surface of the toilet bowl body 2.

[0035] The flushing water tank 42 stores flushing water for cleaning the bowl section 12. In a top view, it is formed in an L-shape, extending forward on the right side of the drain trap pipe 14, then bending and extending to the left side. The flushing water tank 42 is a resin tank that stores flushing water used for rim discharge and jet discharge, and in this embodiment, the entire tank is located inside the toilet bowl body 2.

[0036] The tank water supply unit 46 is located at the top of the cleaning water tank 42 and constitutes part of the cleaning function unit. 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 cleaning water tank 42. Inside the tank water supply unit 46, a flow path is formed to guide cleaning water from the tank water supply pipe 44 towards the cleaning water tank 42.

[0037] The float switch 48 is located above the flushing water tank 42. The float switch 48 is designed to turn off when the water level in the tank falls below the shut-off level (full water level). Conversely, the float switch 48 turns on when the water level in the tank rises to the shut-off level, causing the water supply valve device 32 to close.

[0038] The cleaning water tank 42 is equipped with an overflow pipe 62 for draining cleaning water outside the tank in case, for example, if the float switch 48 malfunctions and the tank continues to supply water. The overflow pipe 62 is connected to a drain socket 30, and when the cleaning water in the cleaning water tank 42 exceeds a predetermined level, the cleaning water is allowed to flow into the drain socket 30 via the overflow pipe 62.

[0039] 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, and 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.

[0040] The pump device 34 is a pressurized pump that pumps the flushing water stored in the tank device 4 to the toilet bowl body 2. The upstream side of the pump device 34 is connected to the 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. When the pump device 34 is operated, the flushing water stored in the tank device 4 is pumped and discharged from the rim outlet 22 and the jet outlet 26, thereby flushing the toilet bowl. In this embodiment of the present invention, the flushing toilet bowl 1 is supplied with flushing water stored in the tank device 4 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, such as a configuration in which all the flushing water stored in the tank device 4 is discharged from the rim outlet 22.

[0041] 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.

[0042] 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 flush 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. In addition, after the toilet bowl is flushed, the control device 38 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.

[0043] Next, with reference to Figure 5, the water supply channel through which the flushing water of the flush toilet 1 according to an embodiment of the present invention flows will be described. Figure 5 is a block diagram showing the water supply channel through which the flushing water of a flush toilet according to an embodiment of the present invention flows.

[0044] 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 pipe 62.

[0045] Next, the configuration of the drain socket 30 and the connection structure between the drain socket 30 and the cleaning water tank 42 will be described with reference to Figures 6 to 11. Figure 6 is a perspective view showing the drain socket 30 and the flush water tank 42 removed from the toilet bowl 1. Figure 7 is a perspective cross-sectional view showing the internal structure of the drain socket 30, cut in the front-to-back direction of the toilet bowl 1. Figure 8 is a perspective cross-sectional view showing the internal structure of the drain socket 30, cut in the width direction of the toilet bowl 1. Figure 9 is a perspective view of the toilet bowl 1 viewed from diagonally below. Figure 10 is a perspective view showing the configuration for opening and closing the water retention valve provided inside the drain socket 30. Figure 11 is a cross-sectional view of the flush water tank 42 showing the connection structure between the flush water tank 42 and the drain socket 30.

[0046] As shown in Figure 6, the drain socket 30 is connected to the highest part of the flushing water tank 42 via an overflow pipe 62, which is an overflow passage. In this embodiment, the overflow pipe 62 is made of a flexible hose and connects the overflow pipe connection chamber 72 of the flushing water tank 42 to the overflow outlet 64c (Figure 8) provided in the drain socket 30. Furthermore, the drain socket 30 has an inlet 30a that opens toward the front of the flushing toilet 1 and a drain pipe connection 30b that opens toward the rear. Overall, the drain socket 30 has a generally crank-shaped passage, with the upper inlet 30a and the lower drain pipe connection 30b connected by a generally vertical passage.

[0047] The inlet portion 30a of the drain socket 30 is connected to the downstream side of the drain trap pipe 14 by receiving the rear pipe 14d (Figure 3) of the drain trap pipe 14. On the other hand, the drain pipe connection portion 30b is connected to the drain pipe by being received into the drain pipe (not shown) for discharging washing water and waste.

[0048] As shown in Figure 7, the drain socket 30 includes an upstream member 64 with an inlet 30a, a downstream member 66 with a drain pipe connection 30b, and a water reservoir valve 68 configured to open and close the pipeline inside the drain socket 30. Furthermore, a wall forming member 70 and a valve seat forming member 71 are arranged inside the upstream member 64. The water reservoir valve 68 is a valve body that can be opened and closed by the user manually in order to enable toilet flushing in the event of a power outage, etc., and constitutes part of the flushing function unit. The function of the water reservoir valve 68 and the flushing procedure in the event of a power outage, etc. will be described later.

[0049] The upstream member 64 is a cylindrical member that extends generally vertically, and has an inlet portion 30a that protrudes horizontally in front of the flush toilet 1. As shown in Figure 8, the inside of the upstream member 64 is provided with a drainage channel configuration wall 64a, a first backflow prevention wall 70a, and a second backflow prevention wall 64b. Furthermore, an overflow outlet 64c and a vent 64d are provided on the upper part of one side of the upstream member 64.

[0050] As shown in Figure 7, the inlet portion 30a is a cylindrical portion provided on the upstream member 64 so as to protrude horizontally forward, and the inside of the inlet portion 30a is in communication with the internal space of the upstream member 64. As a result, the drain trap pipe 14 connected to the inlet portion 30a is in communication with the internal space of the upstream member 64.

[0051] The drainage channel wall 64a is a semi-dome-shaped portion formed inside the upstream member 64, and is positioned to cover approximately the upper half of the circular opening that communicates with the inlet 30a. This drainage channel wall 64a is provided on the upstream side of the water retention valve 68. Furthermore, by providing this drainage channel wall 64a, some of the sewage and washing water that flows from the drain trap pipe 14 through the inlet 30a into the upstream member 64 collide with it and are guided downward. The vent 64d is provided above the lower end of the drainage channel wall 64a.

[0052] As shown in Figure 8, the second backflow prevention wall 64b is a wall surface that extends substantially horizontally from the lower end of the semi-dome-shaped drainage channel constituent wall 64a. This second backflow prevention wall 64b extends so as to connect approximately half of the lower edge of the drainage channel constituent wall 64a with the inner wall surface of the upstream member 64. That is, the second backflow prevention wall 64b is provided at the same height as the lower end of the drainage channel constituent wall 64a.

[0053] On the other hand, as shown in Figure 7, the wall-forming member 70 is a member fitted into the upper end of the upstream member 64, and by positioning the wall-forming member 70, four wall surfaces are formed inside the upstream member 64. Specifically, the wall-forming member 70 forms one wall surface that is generally oriented horizontally, and three wall surfaces that rise upward from this wall surface. The wall surface formed by the wall-forming member 70 that is generally oriented horizontally functions as the first backflow prevention wall 70a.

[0054] Furthermore, as shown in Figure 8, the wall surface rising from the first backflow prevention wall 70a to cover the overflow outlet 64c functions as a valve seat forming wall 70b. This valve seat forming wall 70b rises from the first backflow prevention wall 70a in a direction slightly inclined with respect to the vertical. In addition, the other two wall surfaces 70c and 70d extend vertically on both sides of the valve seat forming wall 70b (Figure 7). Also, an upper end cap 70e is attached to the upper end of the upstream member 64 to close the opening at the upper end.

[0055] On the other hand, as shown in Figure 7, the downstream member 66 has a connecting portion 66a that connects to the upstream member 64 and a parallel flow channel portion 66b having a double-pipe structure. The connecting portion 66a opens vertically upward and is connected to the downstream end of the upstream member 64. The parallel flow channel portion 66b has a first flow channel portion 66c that communicates with the connecting portion 66a and a second flow channel portion 66d that extends parallel to the first flow channel portion 66c, and has a double-pipe structure that extends generally horizontally.

[0056] The first flow channel section 66c is in communication with the inside of the bowl section 12 via the connecting section 66a, the upstream member 64, and the drain trap pipe 14. Therefore, the parallel flow channel section 66b is provided downstream of the drain trap pipe 14, and the wastewater flowing out of the bowl section 12 flows through the first flow channel section 66c of the parallel flow channel section 66b and is discharged into the drain pipe (not shown). On the other hand, the second flow channel section 66d is formed above the first flow channel section 66c so as to surround it.

[0057] On the other hand, the water reservoir valve 68 is installed inside the drain socket 30 to open and close the pipe inside the drain socket 30, and by closing this valve, cleaning water can be stored downstream of the top 14c (Figure 2) of the drain trap pipe 14. In other words, the water reservoir valve 68 is a flapper valve installed at the bend of the downstream member 66, and by closing this valve, cleaning water can be stored upstream of the water reservoir valve 68. Specifically, the water reservoir valve 68 is mounted so as to be rotatable around a support shaft 68a that is oriented horizontally, and when it is oriented horizontally, the flow path inside the drain socket 30 is closed, and cleaning water can be stored inside the drain socket 30.

[0058] As shown in Figure 7, the valve seat forming member 71 is a cylindrical member fitted onto the lower end of the upstream member 64. This valve seat forming member 71 forms a flow path for the cleaning water at the lower part of the upstream member 64. That is, the cleaning water that flows into the drain socket 30 from the inlet 30a passes through the inside of the valve seat forming member 71 and flows into the downstream member 66. The lower end of the valve seat forming member 71 functions as a water reservoir valve seat 71a on which the water reservoir valve 68 sits. That is, when the water reservoir valve 68 is oriented in a substantially horizontal direction, the water reservoir valve 68 abuts against the lower end of the valve seat forming member 71 (water reservoir valve seat 71a), and the flow path in the drain socket 30 is closed.

[0059] Next, referring to Figures 9 and 10, we will describe the configuration for opening and closing the water retention valve 68 provided in the drain socket 30 during a power outage or the like. Figure 9 is a perspective view of the flush toilet 1, seen from diagonally below, showing the operating part, which is manually operated during a power outage, in a hanging position. Figure 10 is a perspective view showing the drain socket 30 and the power outage operating mechanism connected thereto.

[0060] As shown in Figure 9, a power outage operation mechanism 76 is provided at the bottom of the flush toilet 1, allowing the user to manually operate the flushing function of the flush toilet 1 during a power outage. Specifically, the power outage operation mechanism 76 comprises a first power outage operation unit, which is a water reservoir valve operation unit 76a, and a second power outage operation unit, which is a water supply operation unit 76b. During a power outage, the user can manually operate these water reservoir valve operation unit 76a and water supply operation unit 76b to perform toilet flushing.

[0061] Furthermore, in this embodiment, the water reservoir valve operating section 76a and the water supply operating section 76b are normally covered by a bottom cover 77 provided on the bottom surface of the toilet bowl body 2 and cannot be seen from the outside. In the event of a power outage, the user can open the bottom cover 77, causing the water reservoir valve operating section 76a and the water supply operating section 76b to hang down below the bottom surface of the toilet bowl body 2. In this way, the water reservoir valve operating section 76a and the water supply operating section 76b are provided so that the user can operate them from the bottom surface of the toilet bowl body 2. In this specification, "operable from the bottom surface" means that the user can insert their fingers between the bottom surface of the toilet bowl body 2 and the floor and perform operations such as grasping, pulling, and twisting the operating section.

[0062] Furthermore, in this embodiment, the bottom cover 77 is a plate-shaped member whose rear end is fixed to the base plate 40 by a hinge (not shown). The bottom cover 77 is oriented approximately horizontally when closed, and can be opened by rotating it around the hinge, so that it is oriented approximately vertically when open.

[0063] Thus, in this embodiment, the bottom cover 77 is attached to the toilet body 2 in such a way that it does not separate from the toilet body 2 even when it is open. Therefore, after flushing the toilet during a power outage, the bottom cover 77 can be easily returned to its original state. Furthermore, the risk of losing the removed bottom cover 77 can be avoided. Note that the mechanism for preventing the bottom cover 77 from separating from the toilet body 2 is not limited to a hinge mechanism; for example, the bottom cover 77 can be configured to remain connected by a string-like member even when it is open.

[0064] Furthermore, as shown in Figure 9, the water reservoir valve operating section 76a and the water supply operating section 76b are located on the outer periphery of the bottom surface of the toilet bowl body 2. That is, the water reservoir valve operating section 76a and the water supply operating section 76b are located close to the edge of the bottom surface of the toilet bowl body 2. In this specification, the outer periphery of the bottom surface of the toilet bowl body 2 means a position within 150 mm from the edge of the bottom surface of the toilet bowl body 2. In addition, in this embodiment, the water reservoir valve operating section 76a is located in front of the toilet bowl body 2 than the water supply operating section 76b, and the water reservoir valve operating section 76a is located closer to the outer periphery of the bottom surface of the toilet bowl body 2 than the water supply operating section 76b. In this embodiment, the water reservoir valve operating section 76a and the water supply operating section 76b are located below the switching valve device 36 (Figure 2), which constitutes part of the flushing function section.

[0065] Next, as shown in Figure 10, the water reservoir valve operating part 76a is a ring-shaped knob that hangs down from the base plate 40 attached to the bottom surface of the toilet bowl body 2. An operating wire 76c is connected to the water reservoir valve operating part 76a. In the event of a power outage, the user can open and close the water reservoir valve 68 by pinching and pulling the water reservoir valve operating part 76a.

[0066] The operating wire 76c is a wire for transmitting the operating force from the user to the water reservoir valve 68. Specifically, the operating wire 76c consists of a sheath connecting the base plate 40 and the drain socket 30, and a flexible cable (not shown) passed through this sheath. When the user pulls the water reservoir valve operating part 76a, the cable (not shown) inside the sheath is pulled, and the operating force is transmitted to the drain socket 30. The cable (not shown) passed through the operating wire 76c is connected to the support shaft 68a of the water reservoir valve 68 outside the flow path of the drain socket 30.

[0067] As a result, when the water reservoir valve operating part 76a is pulled, the operating force is transmitted by a cable (not shown) to the support shaft 68a of the water reservoir valve 68, causing the water reservoir valve 68 to rotate. When no operating force is applied to the water reservoir valve operating part 76a, the water reservoir valve 68 is in the open state as shown in Figure 7. When the user pulls the water reservoir valve operating part 76a, the water reservoir valve 68 rotates to face horizontally and seats on the water reservoir valve seat 71a at the lower end of the valve seat forming member 71, closing it. In other words, when the user pulls the water reservoir valve operating part 76a a predetermined distance, the water reservoir valve 68 rotates and closes. When the user releases the water reservoir valve operating part 76a, the water reservoir valve 68 returns to the open state. In this way, the water reservoir valve 68 is opened and closed by the user's operation.

[0068] On the other hand, the water supply operation part 76b is a loop-shaped knob that hangs down from the base plate 40 attached to the bottom surface of the toilet bowl body 2. In the event of a power outage, the user can manually operate the water supply valve device 32 (Figure 4A) by pinching and pulling the water supply operation part 76b. An operating wire 76d is connected to the water supply operation part 76b.

[0069] The operating wire 76d is a wire for transmitting the operating force from the user to the water supply valve device 32. Specifically, the operating wire 76d consists of a sheath connecting the base plate 40 and the water supply valve device 32 (Figure 4A), and a flexible cable (not shown) passed through this sheath. When the user pulls the water supply operating part 76b, the cable (not shown) inside the sheath is pulled, and the operating force is transmitted to the water supply valve device 32. The cable (not shown) passed through the operating wire 76d is connected to a solenoid valve (not shown) built into the water supply valve device 32, which can be operated manually. That is, when the user pulls the water supply operating part 76b a predetermined distance, the solenoid valve (not shown) is operated.

[0070] When the user pulls the water supply operation unit 76b once, the solenoid valve (not shown) opens, and cleaning water is supplied from the water supply valve device 32 to the cleaning water tank 42 via the tank water supply pipe 44 and the tank water supply unit 46 (Figure 4A). Furthermore, when the user pulls the water supply operation unit 76b again, the solenoid valve (not shown) closes, and the supply of water from the water supply valve device 32 to the cleaning water tank 42 stops. In the event of a power outage, the user operates the water supply operation unit 76b to allow cleaning water to flow into the cleaning water tank 42, and intentionally causes the cleaning water to overflow from the cleaning water tank 42, thereby allowing the cleaning water to flow into the drain socket 30. Note that the stroke (distance) required for the user to pull the water reservoir valve operation unit 76a to close the water reservoir valve 68 is set to be longer than the stroke (distance) required for the user to pull the water supply operation unit 76b to operate the solenoid valve (not shown).

[0071] Next, referring to Figure 11, we will explain the configuration for storing flushing water in the drain socket 30 in order to manually flush the toilet during a power outage or the like. First, as shown in Figure 6, an overflow pipe connection chamber 72 is provided above the rear of the cleaning water tank 42. This overflow pipe connection chamber 72 is roughly cubic in shape and is configured to communicate watertightly with the internal space of the cleaning water tank 42. An overflow pipe 62 is watertightly connected to one side of the overflow pipe connection chamber 72.

[0072] Furthermore, as shown in Figure 11, a circular outlet hole 72a is provided on one side of the overflow pipe connection chamber 72, and the overflow water that flows out from this outlet hole 72a flows into the drain socket 30 via the overflow pipe 62. That is, when the cleaning water in the cleaning water tank 42 exceeds a predetermined water level, which is the height h of the lower end of the outlet hole 72a, the cleaning water in the cleaning water tank 42 flows out as overflow water into the overflow pipe 62. In the event of a power outage, etc., the user operates the water supply operation unit 76b to supply water from the water supply valve device 32 to the cleaning water tank 42, and intentionally causes the cleaning water to overflow from the cleaning water tank 42. The overflow water from the cleaning water tank 42 flows into the drain socket 30 via the overflow pipe 62 and is stored in the drain socket 30. Note that since the cleaning water tank 42 has a sealed structure, the cleaning water will not flow out of the cleaning water tank 42 until the water level in the cleaning water tank 42 exceeds the height h.

[0073] Furthermore, a descending pipe 74 is connected to the lower side of the overflow pipe connection chamber 72, extending vertically downward from the overflow pipe connection chamber 72. This descending pipe 74 is also watertightly connected to the bottom surface of the overflow pipe connection chamber 72, and the inside of the descending pipe 74 is in communication with the inside of the overflow pipe connection chamber 72. Therefore, when the water level in the cleaning water tank 42 rises, the water level in the descending pipe 74 also rises, and when the water level in the descending pipe 74 becomes higher than the bottom surface of the overflow pipe connection chamber 72, the cleaning water in the descending pipe 74 flows into the overflow pipe connection chamber 72.

[0074] Furthermore, the lower end of the descending pipe 74 extends to near the bottom surface of the cleaning water tank 42. On the other hand, a partition wall 42a is provided on the bottom surface of the cleaning water tank 42 so as to surround the lower end of the descending pipe 74. This partition wall 42a is formed to surround a part of the space inside the cleaning water tank 42. Therefore, even if the cleaning water inside the cleaning water tank 42 is sucked out by the pump device 34, as shown in Figure 11, the cleaning water in the space surrounded by the partition wall 42a remains inside the cleaning water tank 42.

[0075] Furthermore, since the upper end of the partition wall 42a is located above the lower end of the descending pipe 74, the lower end of the descending pipe 74 is always submerged in the cleaning water remaining inside the partition wall 42a. For this reason, although the internal space of the cleaning water tank 42 is in communication with the drain socket 30 via the overflow pipe 62, odors from the drainage piping (not shown) do not leak into the cleaning water tank 42 through the drain socket 30 and the overflow pipe 62.

[0076] Next, referring again to Figures 7 and 8, the mechanism for allowing overflow water to flow into the drain socket 30 will be explained. As shown in Figure 8, an overflow outlet 64c is provided on the upper side of the drain socket 30, and an overflow pipe 62 is connected to this overflow outlet 64c. Therefore, when cleaning water overflows from the cleaning water tank 42, the cleaning water flows into the drain socket 30 through the overflow pipe 62 and the overflow outlet 64c.

[0077] As described above, a valve seat forming wall 70b is provided inside the drain socket 30 so as to cover the overflow outlet 64c. A valve opening 70f (Figure 7) is provided in this valve seat forming wall 70b so as to communicate with the overflow outlet 64c. A flapper valve 78, which is a valve mechanism, is attached to the valve seat forming wall 70b so as to open and close the valve opening 70f. As shown in Figure 8, the flapper valve 78 is rotatably attached to the valve seat forming wall 70b by a support shaft 78a which is generally oriented horizontally. Since the valve seat forming wall 70b is slightly inclined with respect to the vertical, when no overflow water is flowing, the flapper valve 78 sits on the valve opening 70f by its own weight and is in a closed state. When overflow water flows from the overflow pipe 62, the flapper valve 78 is opened by the water pressure. The cleaning water that flows into the drain socket 30 from the overflow pipe 62 falls towards the water reservoir opening valve 68.

[0078] On the other hand, as shown in Figure 8, a vent 64d is provided on the upper side of the drain socket 30, alongside the overflow outlet 64c. This vent 64d is located to the side of the overflow outlet 64c, higher than the center of the overflow outlet 64c. This vent 64d is opened and closed by a flapper valve 78, which is a valve mechanism, together with the valve port 70f of the overflow outlet 64c. Therefore, when no overflow water is flowing, the vent 64d is closed, and when overflow water flows, the vent 64d is opened. As a result, when overflow water flows and cleaning water enters the drain socket 30 from the overflow outlet 64c, any air that has been trapped inside the drain socket 30 is discharged through the vent 64d.

[0079] Furthermore, as shown in Figure 7, an air vent pipe 80 is connected to the vent port 64d. The other end of this air vent pipe 80 is connected to the second flow channel section 66d of the parallel flow channel section 66b. That is, the other end of the air vent pipe 80 extending from the vent port 64d is connected to a vent outlet 66e formed to communicate with the second flow channel section 66d, and the vent port 64d and the vent outlet 66e are in communication via the air vent pipe 80. Therefore, the air discharged through the vent port 64d flows into the second flow channel section 66d of the drain socket 30.

[0080] Furthermore, a vent outlet valve 82 is provided at the vent outlet 66e, which opens and closes the vent outlet 66e. When no air is being discharged, the vent outlet 66e is closed by its own weight, and when air is pushed out from the vent opening 64d, it is opened by the pressure of the air. In this way, since the vent outlet 66e is normally closed, odors from inside the drainage piping do not leak into the drain socket 30.

[0081] Next, the operation of the flush toilet 1 according to an embodiment of the present invention will be described. First, when the user operates the remote control (not shown) to flush the toilet, the pump device 34 and the switching valve device 36 are activated, and the flushing water in the flushing water tank 42 is discharged from the rim outlet 22 and the jet outlet 26 according to a predetermined flushing sequence. As a result, the inside of the bowl 12 is flushed, and the waste and flushing water inside the bowl 12 flow into the drain socket 30 through the drain trap pipe 14.

[0082] The waste and washing water that flow into the drain socket 30 are guided downward by the drain channel component wall 64a and fall downward within the drain socket 30. The waste and washing water that flow into the drain socket 30 fill the flow channel below the drain channel component wall 64a within the drain socket 30, inducing a siphon effect within the drain socket 30. Due to the siphon effect, the waste and washing water in the bowl section are drawn into the drain trap pipe 14. The waste and washing water that flow from the drain trap pipe 14 into the drain socket 30 are discharged into the drain pipe (not shown) through the first flow channel section 66c formed in the parallel flow channel section 66b.

[0083] When the toilet flushing is complete, the tank water supply unit 46 is activated, and flushing water supplied from the water supply flows into the flushing water tank 42. If the water level in the flushing water tank 42 rises above the specified level due to a malfunction of the tank water supply unit 46 or any other reason, and becomes higher than the specified level (height h of the lower end of the outlet hole 72a (Figure 11)), the flushing water flows out from the outlet hole 72a. The overflow water flows into the drain socket 30 through the overflow pipe 62 and the overflow outlet 64c (Figure 8), and is discharged into the drainage piping (not shown) through the first flow path section 66c (Figure 7) of the drainage socket 30. At this time, the flapper valve 78 provided at the overflow outlet 64c is opened by the water pressure of the overflow water. As a result, even if a malfunction occurs in the tank water supply unit 46 or the like, the flushing water is discharged into the drainage piping (not shown) without leaking into the toilet room.

[0084] Next, with reference to Figure 12, the procedure for flushing a toilet during a power outage will be explained. Figure 12 is a cross-sectional view showing the state in which the water reservoir valve 68 is closed and flushing water is stored in the drain socket 30 in order to perform toilet flushing during a power outage.

[0085] During a power outage, the pump device 34 cannot be operated, making it impossible to discharge the cleaning water from the cleaning water tank through the rim outlet 22 or the jet outlet 26. Therefore, the user manually generates a siphon effect in the drain socket 30 to discharge the waste and cleaning water from the bowl section 12 into the drainage pipe (not shown).

[0086] First, in the event of a power outage, the user opens the bottom cover 77 (Figure 9) located on the bottom of the flush toilet 1. When closed, the bottom cover 77 is positioned approximately horizontally. By rotating the hinge (not shown) located at the rear end of the bottom cover 77, it opens and hangs down approximately vertically. As a result, the water reservoir valve operating section 76a and the water supply operating section 76b, which were housed above the bottom cover 77, hang down below the bottom of the flush toilet body 2.

[0087] Next, the user pulls the hanging water reservoir valve operating part 76a (Figure 9) to operate the water reservoir valve 68. That is, by pulling the water reservoir valve operating part 76a, the water reservoir valve 68 inside the drain socket 30 is rotated to the closed state shown in Figure 12. In other words, the water reservoir valve 68 is closed by rotating it and seating it on the water reservoir valve seat 71a of the valve seat forming member 71. At this time, since the water reservoir valve operating part 76a is located on the outer circumference of the bottom surface of the toilet bowl body 2, the user can easily operate it even though the operating part is located on the bottom surface. Also, when performing manual toilet flushing, the water reservoir valve operating part 76a, which should be operated first, is located on the front side of the toilet bowl body 2, so the user can intuitively grasp the operating procedure.

[0088] Next, the user pulls the water supply operation part 76b (Figure 9) hanging down from the bottom of the flush toilet 1 to activate the tank water supply unit 46. That is, by pulling the water supply operation part 76b, the solenoid valve (not shown) provided in the water supply valve device 32 (Figure 4A) is manually operated and opened. As a result, flushing water is supplied from the water supply valve device 32 to the flushing water tank 42 via the tank water supply pipe 44 and the tank water supply unit 46 (Figure 4A). At this time, the water reservoir valve operation part 76a, which has a long stroke required for operation, is located outside (closer to the outer circumference of the bottom surface of the flush toilet body 2) than the water supply operation part 76b, which has a short stroke, so it does not interfere with the operation of the water supply operation part 76b and can be operated easily.

[0089] In this case, when the flush toilet 1 is in standby mode, flush water is stored in the flush water tank 42 up to a specified level. However, when water is supplied to the flush water tank 42, the water level in the flush water tank 42 rises further. When the water level in the flush water tank 42 exceeds the height h (Figure 10) of the lower end of the outlet hole 72a, the flush water in the flush water tank 42 flows into the drain socket 30 through the outlet hole 72a, the overflow pipe 62, and the valve opening 70f. In this way, in the event of a power outage, flush water is intentionally made to overflow from the flush water tank 42 and flow into the drain socket 30. The flapper valve 78 provided at the valve opening 70f is opened by the force of the overflowing flush water. At the same time, the vent 64d provided adjacent to the valve opening 70f is also opened.

[0090] The cleaning water that flows into the drain socket 30 flows downwards. Since the water reservoir valve seat 71a is closed by the water reservoir valve 68, the cleaning water that overflows from the cleaning water tank 42 is collected on the water reservoir valve 68 inside the drain socket 30, as shown in Figure 12. Meanwhile, the air that was trapped inside the drain socket 30 flows out through the vent port 64d because the vent port 64d is open. The air that flows out from the vent port 64d flows through the air vent pipe 80 and out into the drain pipe from the vent outlet 66e (Figure 7) provided in the second flow path section 66d. The vent outlet valve 82 provided in the vent outlet 66e is opened by the air being pushed out from the vent outlet 66e.

[0091] The flushing water that flows into the drain socket 30 flows through the drain trap pipe 14 and into the bowl section 12, raising the water level in the bowl section 12. When a sufficient amount of flushing water has accumulated, the user releases the water reservoir valve operating part 76a, opening the water reservoir on-off valve 68. This causes the flushing water that had accumulated above the water reservoir on-off valve 68 to fall all at once, inducing a siphon effect within the drain socket 30. As a result, the flushing water and waste in the bowl section 12 are drawn into the drain trap pipe 14 and discharged into the drainage pipe (not shown). Next, the user pulls the water supply operating part 76b (Figure 9) again to close the solenoid valve (not shown) provided in the water supply valve device 32 (Figure 4A). This stops the supply of flushing water from the water supply valve device 32 to the flushing water tank 42, completing one toilet flush.

[0092] In the example described above, the user released the water reservoir valve operating section 76a to open the water reservoir valve 68 while the water supply from the water supply valve device 32 was continuing. However, before opening the water reservoir valve 68, the user may pull the water supply operating section 76b (Figure 9) to stop the supply of cleaning water. By stopping the supply of cleaning water to the drain socket 30 in this way, the flapper valve 78 closes the valve opening 70f and the vent opening 64d. Therefore, when the user releases the water reservoir valve operating section 76a to open the water reservoir valve 68, the vent opening 64d can be kept closed, making the siphon effect generated in the drain socket 30 stronger.

[0093] In the flush toilet 1 embodiment of the present invention, the water reservoir valve operating unit 76a, which is the first power outage operation unit, is provided so as to be operable from the bottom surface of the flush toilet body 2 (Figure 9). Therefore, there is no need to provide a removable cover on the side or top surface of the flush toilet body 2, and the user can easily operate the water reservoir valve operating unit 76a in the event of a power outage. As a result, a flush toilet can be constructed that allows the user to manually flush the toilet in the event of a power outage without being substantially constrained by design limitations.

[0094] Furthermore, in the flush toilet 1 of this embodiment, since the water reservoir valve operating section 76a is located on the outer circumference of the bottom surface of the flush toilet body 2, a user standing next to the flush toilet body 2 can easily reach their fingers to the water reservoir valve operating section 76a, and the user can easily operate the water reservoir valve operating section 76a.

[0095] Furthermore, in the flush toilet 1 of this embodiment, since the water reservoir valve operating unit 76a is located below the flushing function unit, a mechanism for operating the flushing function unit using the water reservoir valve operating unit 76a can be easily constructed.

[0096] Furthermore, according to the flush toilet 1 of this embodiment, there is also a water supply operation unit 76b as a second power outage operation unit, and of the water reservoir valve operation unit 76a and the water supply operation unit 76b, the water reservoir valve operation unit 76a, which should be operated first when performing toilet flushing, is located on the front side of the flush toilet body 2, so that the user can intuitively grasp the manual toilet flushing operation procedure and easily perform toilet flushing.

[0097] Furthermore, according to the flush toilet 1 of this embodiment, of the water reservoir valve operating section 76a and the water supply operating section 76b, the water reservoir valve operating section 76a, which has a longer stroke required for operation, is positioned near the outer circumference of the bottom surface of the flush toilet body 2. Therefore, the water reservoir valve operating section 76a, which has a longer stroke required for operation, is less likely to interfere with the operation of the water supply operating section 76b, and the user can easily perform manual toilet flushing.

[0098] Furthermore, according to the flush toilet 1 of this embodiment, a bottom cover 77 is provided, and when the bottom cover 77 is opened, the water reservoir valve operating section 76a and the water supply operating section 76b hang down below the bottom surface of the flush toilet body. Therefore, when the bottom cover is opened, the user can immediately recognize the presence of the water reservoir valve operating section 76a and the water supply operating section 76b and flush the toilet during a power outage without any confusion.

[0099] Furthermore, according to the flush toilet 1 of this embodiment, the bottom cover 77 is attached to the flush toilet body 2 so that it does not separate from the flush toilet body 2 even when it is open. Therefore, when it is no longer necessary to use the water reservoir valve operating section 76a and the water supply operating section 76b, the bottom cover 77 can be easily returned to its original state.

[0100] While embodiments of the present invention have been described above, various modifications can be made to the embodiments described above. In particular, in the embodiments described above, toilet flushing was performed by operating the water reservoir valve operating unit and the water supply operating unit in the event of a power outage. However, the present invention is not limited to this, and can be applied to any type of flush toilet that allows toilet flushing in the event of a power outage by operating a single operating unit. Furthermore, in the embodiments described above, the water reservoir valve operating unit was provided as the first power outage operating unit, and the water supply operating unit was provided as the second power outage operating unit, but the water supply operating unit can be made the first power outage operating unit, and the water reservoir valve operating unit can be made the second power outage operating unit. [Explanation of symbols]

[0101] 1 flush toilet 2 Flush toilet body 2a Bottom opening 4. Tank device (cleaning function unit) 6. Sanitary cleaning equipment 8. Shut-off valve 10 Water supply pipe 12 Bowl section 14 Drain trap pipe 14a Entrance 14b Ascent conduit 14c top 14d Rear conduit 16 Skirt section 18 Waste receiving surface 20 Rim section 22 Rim spout 24 Rim water conduit 26 Jet nozzle 28. Jet water conduit 30 Drain sockets 30a Entrance 30b Drainage pipe connection 32. Water supply valve device (cleaning function unit) 34 Pump device (cleaning function unit) 36. Switching valve device (cleaning function unit) 38 Control device (cleaning function unit) 40 base plate 42 Washing water tank 42a Partition wall 44 Water supply pipe for tank 46. ​​Tank water supply unit (cleaning function section) 48 Float switch 50 Fixing member 52 Water supply pipe for sanitary cleaning equipment 54 Upstream connecting pipe 56 Downstream connecting pipe 58 Rim water supply pipe 60 Water supply pipe for jet 62 Overflow pipe 64 Upstream member 64a Drainage channel configuration wall 64b Second backflow prevention wall 64c Overflow Outlet 64d Ventilation 66 Downstream member 66a Connection part 66b Parallel channel section 66c First channel section 66d Second channel section 66e Ventilation Outlet 68. Water reservoir opening / closing valve (cleaning function section) 68a spindle 70 Wall forming member 70a First backflow prevention wall 70b Valve seat forming wall 70c wall 70d wall surface 70e Top cap 70f valve opening 71 Valve seat forming member 71a Water reservoir valve seat 72 Overflow pipe connection chamber 72a Outflow hole 74 Downcomer 76 Power outage operation mechanism 76a Water reservoir valve operating section (first power outage operating section) 76b Water supply control unit (second power outage control unit) 76c Operating wire 76d Operating wire 77 Bottom cover 78. Flapper valve (valve mechanism) 78a spindle 80 Air vent pipe 82 Ventilation outlet valve

Claims

1. A flush toilet that can be manually flushed during a power outage, A flush toilet body is mounted on the wall, spaced apart from the floor, and comprises a bowl for receiving waste and a drain trap pipe extending from below the bowl. A flushing function unit is provided in the flushing toilet body to clean the bowl portion of the flushing toilet body, In the event of a power outage, a first power outage control unit is provided to activate the above-mentioned cleaning function unit by the user's operation, It has, A flush toilet characterized in that the first power outage control unit described above is provided so as to be operable from the bottom surface of the flush toilet body.

2. The flush toilet according to claim 1, wherein the first power outage control unit is located on the outer periphery of the bottom surface of the flush toilet body.

3. The flush toilet according to claim 1, wherein the first power outage control unit is located below the cleaning function unit.

4. Furthermore, the flush toilet according to claim 1, which has a second power outage control unit that is operable from the bottom surface of the flush toilet body so as to activate the above-mentioned flushing function unit by the user's operation, wherein of the first power outage control unit and the second power outage control unit, the control unit that should be operated first when performing toilet flushing is located on the front side of the flush toilet body.

5. Furthermore, the flush toilet according to claim 1, which has a second power outage control unit that is operable from the bottom surface of the flush toilet body so as to activate the above-mentioned flushing function unit by operation by the user, wherein the first power outage control unit and the second power outage control unit are configured such that the above-mentioned flushing function unit is activated when pulled a predetermined distance, and the flush toilet according to claim 1, wherein the one of the first power outage control unit and the second power outage control unit that has a longer stroke required for operation is positioned closer to the outer circumference of the bottom surface of the flush toilet body.

6. Furthermore, the flush toilet according to claim 1, having a bottom cover that covers at least a part of the flush toilet body, wherein the first power outage control unit is configured to hang down below the bottom surface of the flush toilet body when the bottom cover is opened.

7. The flush toilet according to claim 6, wherein the bottom cover is attached to the flush toilet body so that it does not separate from the flush toilet body even when it is open.

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