Water-washable toilet

Abstract

The present invention aims to provide a flush toilet that allows for easy removal of the drain socket, thereby improving maintainability. [Solution] The present invention relates to a flush toilet 1 connected to a drain pipe located on a wall W, comprising: a toilet body 2 having a bowl portion 12 for receiving waste, water outlets 22, 26 for discharging flushing water into the bowl portion 12, and a drain trap pipe 14 connected below the bowl portion 12 and extending upward and rearward; a drain socket 30 for connecting the drain trap pipe 14 to the drain pipe; and a fixing member 31 for fixing the drain socket 30 to the toilet body 2, wherein the drain socket 30 comprises a first fixing portion 74b, a second fixing portion 74c, and a third fixing portion 74d for fixing the drain socket 30 to the toilet body 2 by the fixing member 31, and these fixing portions are fixed to the rear portion 2a of the toilet body 2 by the fixing member 31.

Description

Technical Field

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet connected to a drain pipe arranged on a wall surface.

Background Art

[0002] Conventionally, as described in Patent Document 1, a flush toilet connected to a drain pipe arranged inside a wall surface is known. Such a flush toilet is provided with a resin drain socket in order to connect the drain trap pipe of the toilet body to the drain pipe. The drain socket is fixed to the drain trap pipe by bolts near the top of the drain trap pipe, and forms a drain flow path integrally with the drain trap pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the flush toilet described in Patent Document 1 mentioned above has a problem that it is difficult to remove the drain socket during maintenance because the drain socket is fixed by bolts near the top of the drain trap pipe. Specifically, many functional devices such as a water supply valve device and a pump device for supplying washing water to the toilet body are provided around the top of the drain trap pipe. During maintenance, in order to remove the drain socket from the drain trap pipe, the functional devices near the top of the drain trap pipe must be removed in order to remove the drain socket.

[0005] Therefore, the present invention has been made to solve the above-mentioned problems and aims to provide a flush toilet that allows for easy removal of the drain socket and improves maintainability. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flush toilet connected to a drain pipe located on a wall, comprising: a toilet body having a bowl portion for receiving waste, a spout for discharging flushing water into the bowl portion, and a drain trap pipe connected to the lower part of the bowl portion and extending upward and to the rear; a drain socket for connecting the drain trap pipe to the drain pipe; and a fixing member for fixing the drain socket to the toilet body, wherein the drain socket has a fixing part for fixing the drain socket to the toilet body by the fixing member, and this fixing part is fixed to the rear of the toilet body by the fixing member. In the present invention configured as described above, the drain socket is equipped with a fixing part for fixing the drain socket to the toilet bowl body by a fixing member, and this fixing part is fixed to the rear of the toilet bowl body by the fixing member, so that the drain socket can be removed from the rear of the toilet bowl body. This makes it easier to remove the drain socket and improves maintainability.

[0007] In the present invention, preferably, at least three fixing parts are provided for the drain socket. In the present invention configured in this way, at least three fixing parts are provided for the drain socket, so that even if the position of the drain pipe installed in the wall is off from the reference point, the load of the drain socket can be supported by the fixing members. This ensures a good seal between the drain socket and the drain pipe.

[0008] Furthermore, in the present invention, preferably, at least one of the fixing portions of the drain socket is provided above the central axis in the vertical direction of the downstream end of the drain socket, and at least one of the fixing portions of the drain socket is provided below the central axis. In the present invention configured as described above, at least one of the fixing parts of the drain socket is provided above the central axis in the vertical direction of the downstream end of the drain socket, and at least one of the fixing parts of the drain socket is provided below the central axis, so that the drain socket can be stably fixed in the vertical direction. This ensures a good seal between the drain socket and the drain pipe.

[0009] In the present invention, preferably, the drain trap pipe is connected by being inserted into the drain socket. In the present invention configured in this way, the drain trap pipe is connected by being inserted into the drain socket, and since the drain trap pipe and the drain socket are not fixed by a fixing member, if an error occurs in the front-to-back direction, the error can be absorbed by shifting in the front-to-back direction.

[0010] In addition, in the present invention, preferably, the fixing member comprises an elastically deformable rubber bushing, a nut embedded in the rubber bushing, a bolt screwed onto the nut, and a washer that contacts the fixing part of the drain socket. When the bolt is tightened, the nut moves and the rubber bushing elastically deforms, thereby fixing the drain socket to the toilet bowl body. In the present invention configured as described above, the fixing member comprises an elastically deformable rubber bushing, a nut embedded in the rubber bushing, a bolt screwed into the nut, and a washer that contacts the fixing part of the drain socket. When the bolt is tightened, the nut moves and the rubber bushing elastically deforms, thereby fixing the drain socket to the toilet bowl body. This allows the drain socket to be easily fixed to the toilet bowl body. [Effects of the Invention]

[0011] According to the flush toilet of the present invention, the drain socket can be easily removed, improving maintainability. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view showing a flush toilet according to one embodiment of the present invention. [Figure 2] This is a top view of a flush toilet with the sanitary cleaning device removed, according to one embodiment of the present invention. [Figure 3] This is a cross-sectional view along line III-III in Figure 2. [Figure 4] This is a diagram showing the water supply channel through which flushing water flows for a flush toilet according to one embodiment of the present invention. [Figure 5] This is a perspective view of the drain socket of a flush toilet according to one embodiment of the present invention. [Figure 6] This is an enlarged view of section A in Figure 3. [Figure 7] This is a rear view showing a flush toilet according to one embodiment of the present invention. [Figure 8] This is an enlarged view of section B in Figure 6. [Modes for carrying out the invention]

[0013] A flush toilet 1 according to one embodiment of the present invention will be described below with reference to the attached drawings. First, the basic structure of a flush toilet 1 according to one 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 one embodiment of the present invention, Figure 2 is a top view of the flush toilet according to one embodiment of the present invention with the sanitary cleaning device removed, and Figure 3 is a 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."

[0014] As shown in FIG. 1, the flushing toilet 1 according to an embodiment of the present invention is a wall-mounted flushing toilet whose back surface is fixed to a wall surface W. The flushing toilet 1 includes a ceramic toilet body 2, a tank device 4 for storing the flushing water supplied to the toilet body 2, and a sanitary flushing device 6 placed on the upper surface of the toilet body 2. A stop valve 8 for supplying or stopping the flushing water from a water supply source (not shown) such as a water pipe to the flushing toilet 1 is provided on the wall surface W. This stop valve 8 is connected to the flushing toilet 1 via a water supply pipe 10.

[0015] As shown in FIGS. 2 and 3, the toilet body 2 is formed with a bowl portion 12 for receiving dirt, a drain trap pipe 14 connected below the bowl portion 12 for discharging dirt, and a skirt portion 16 surrounding the bowl portion 12 and the drain trap pipe 14 from the outside. A space S inside the toilet body 2 is formed between the bowl portion 12 and the drain trap pipe 14 and the skirt portion 16.

[0016] The bowl portion 12 includes a bowl-shaped dirt receiving surface 18 and a rim portion 20 formed along the upper edge portion of the bowl portion 12. Standing water is formed inside the bowl portion 12.

[0017] A rim water outlet 22 (water outlet) for discharging the flushing water backward and a rim water guide path 24 for guiding the flushing water to the rim water outlet 22 are formed in the rim portion 20. The rim water outlet 22 is disposed near the center in the front-rear direction on the right side of the bowl portion 12. The flushing water discharged from the rim water outlet 22 flows down to the dirt receiving surface 18 while swirling along the inner peripheral surface of the rim portion 20 to wash the bowl portion 12.

[0018] Below the bowl section 12, a jet outlet 26 (outlet) that discharges cleaning water toward the inlet 14a of the drain trap pipe 14 and a jet water channel 28 that supplies cleaning water to the jet outlet 26 are formed. 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.

[0019] One embodiment of the present invention describes a flush toilet 1 which 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 include, for example, a wash-down type flush toilet that washes away waste with the flowing 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.

[0020] The drain trap pipe 14 comprises an inlet 14a connected to the bottom of the bowl portion 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 WL, a rear pipe 14d extending almost horizontally backward from the top 14c, and an outlet end 14e located at the furthest downstream point of the rear pipe 14d. 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. The drain socket 30 is fixed to the rear part 2a of the toilet body by a fixing member 31. The rear part 2a of the toilet body is a recessed portion extending forward from the rear end of the toilet that is in contact with the wall W.

[0021] 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.

[0022] 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 2 are housed in the space S behind the bowl portion 12 within the toilet bowl body 2. Specifically, the functional devices house 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 attached to the lower opening 2b 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.

[0023] The tank device 4 includes a water storage tank 42 for storing flushing water supplied to the toilet bowl body 2, a tank water supply unit 46 for allowing flushing water from the tank water supply pipe 44 to flow into the water storage tank 42, and a float switch 48 for detecting the water level of the flushing water stored in the water storage tank 42. The water storage tank 42 is formed in an L-shape when viewed from above. The water storage tank 42 is positioned in the space S below the bowl portion 12 inside the toilet bowl body 2, extending forward to the right of the bowl portion 12, bending in front of the bowl portion 12, and extending to the left of the bowl portion 12. The float switch 48 is positioned above the water storage tank 42 and is set to an OFF state when the water level in the tank falls below the shut-off water level (full water level), opening the water supply valve device 32 to start water supply to the tank, and to an ON state when the water level in the tank rises and reaches the shut-off water level, closing the water supply valve device 32 to end water supply to the tank.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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, a pump device 34, and a switching valve device 36, 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.

[0028] Next, Figure 4 illustrates the water supply channel through which the flushing water of a flush toilet 1 according to one embodiment of the present invention flows. Figure 4 is a diagram showing the water supply channel through which flushing water flows for a flush toilet according to one embodiment of the present invention.

[0029] 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.

[0030] Next, the drain socket 30 of the flush toilet 1 according to one embodiment of the present invention will be described in detail with reference to Figures 5 to 8. Figure 5 is a perspective view of the drain socket of a flush toilet according to one embodiment of the present invention, Figure 6 is an enlarged view of part A of Figure 3, Figure 7 is a rear view showing a flush toilet according to one embodiment of the present invention, and Figure 8 is an enlarged view of part B of Figure 6.

[0031] As shown in Figures 5 and 6, the drain socket 30 includes a toilet-side connection part 70 that connects to the drain trap pipe 14, a drain channel section 72 that extends downward from the toilet-side connection part 70, and a drain pipe-side connection part 74 that extends rearward from the drain channel section 72 and connects to a drain pipe (not shown). The toilet-side connection part 70, the drain channel section 72, and the drain pipe-side connection part 74 are each made of separate components. In one embodiment of the present invention, the flush toilet 1 has a toilet-side connection part 70, a drainage channel part 72, and a drain pipe-side connection part 74, each composed of separate components. However, the invention is not limited to this configuration. In other configurations, for example, the toilet-side connection part 70, the drainage channel part 72, and the drain pipe-side connection part 74 may be integrally formed, or parts of these may be integrally formed.

[0032] The toilet-side connection portion 70 of the drain socket 30 extends horizontally, with its upstream end opening forward. An elastically deformable packing 70a is fitted to the outer surface of the toilet-side connection portion 70. The packing 70a is made of rubber material. The outlet end 14e of the drain trap pipe 14 is inserted inside the packing 70a fitted to the toilet-side connection portion 70. The drain trap pipe 14 is in watertight contact with the packing 70a. In this way, the drain socket 30 and the drain trap pipe 14 are connected by the outlet end 14e of the drain trap pipe 14 being inserted into the toilet-side connection portion 70 of the drain socket 30, without being fixed by bolts or the like. This allows the relative position of the drain socket 30 and the toilet body 2 to be adjusted in the front-to-back direction, and if an error occurs in the front-to-back direction, it can be shifted in the front-to-back direction to absorb the error.

[0033] The drainage channel section 72 of the drain socket 30 extends vertically, and a drainage channel through which cleaning water flows is formed inside it. An overflow unit 62 is provided at the upper end of the drainage channel section 72, and the drainage channel within the drainage channel section 72 is in communication with the inside of the tank device 4. As a result, cleaning water that overflows from the tank device 4 flows into the drainage channel section 72 via the overflow unit 62 and is discharged into the drain pipe.

[0034] The drain pipe side connection portion 74 of the drain socket 30 extends horizontally, with its downstream end opening facing rearward. The drain pipe side connection portion 74 comprises a main body portion 74a having a drainage channel through which flushing water flows, and a fixing portion for fixing the drain socket 30 to the toilet bowl body 2 by a fixing member 31. The fixing portion comprises three fixing portions: a first fixing portion 74b, a second fixing portion 74c, and a third fixing portion 74d. Each fixing portion has an insertion hole 74e into which the fixing member 31 is inserted. Each insertion hole 74e is positioned to coincide with each mounting hole 2c provided on the rear surface 2a of the toilet bowl body 2. As a result, the fixing member 31 is inserted into the insertion hole 74e and the mounting hole 2c, and the drain socket 30 is fixed to the toilet bowl body 2.

[0035] The first fixing part 74b is formed in a plate shape and extends vertically downward from the main body part 74a. The second fixing part 74c is also formed in a plate shape and extends diagonally upward to the right from the main body part 74a. Furthermore, the third fixing part 74d is also formed in a plate shape and extends diagonally upward to the left from the main body part 74a. The second fixing part 74c and the third fixing part 74d are connected and reinforced by a support part 74f that extends in the left-right direction.

[0036] As shown in Figure 7, the first fixing part 74b is positioned below the central axis CL1 in the vertical direction of the downstream end 74g of the main body part 74a when viewed from the rear. The second fixing part 74c and the third fixing part 74d are positioned above the central axis CL1. Furthermore, the second fixing part 74c and the third fixing part 74d are positioned symmetrically with respect to the central axis CL2 in the horizontal direction of the downstream end 74g of the main body part 74a. The downstream end 74g of the main body part 74a opens toward the rear and is inserted into and connected to the drain pipe. The flow path cross-section of the downstream end 74g of the main body part 74a is formed to be approximately the same circular shape as the drain pipe, and its outer diameter is formed to be approximately the same size as the inner diameter of the drain pipe. In one embodiment of the present invention, the flush toilet 1 is provided with three fixing parts for the drain socket, but the invention is not limited to this configuration. In other configurations, for example, the fixing parts for the drain socket may be provided with one, two, or four or more parts.

[0037] As shown in Figure 8, the fixing member 31 comprises a rubber bushing 31a that is inserted into a mounting hole 2c in the back portion 2a of the toilet bowl body 2 and elastically deforms, a nut 31b embedded in the rubber bushing 31a, a bolt 31c that is screwed onto the nut 31b, and a washer 31d that abuts against the surface of the first fixing part 74b. When installing the fixing member 31, first insert the rubber bushing 31a into the mounting hole 2c. Next, tighten the bolt 31c from the rear (back portion 2a side) of the toilet bowl body 2. As the bolt 31c is tightened, the nut 31b inside the rubber bushing 31a moves towards the rear. As the nut 31b moves, the rubber bushing 31a elastically deforms and is pressed against the back surface of the back portion 2a of the toilet bowl body 2. This fixes the drain socket 30 to the toilet bowl body 2. The fixing structures in the second fixing section 74c and the third fixing section 74d are the same as the fixing structure of the first fixing section 74b described above, and therefore their explanation is omitted.

[0038] The following describes the operation and effects of the flush toilet 1 according to the above-described embodiment. First, according to the flush toilet 1 of one embodiment of the present invention, the drain socket 30 is equipped with a first fixing part 74b, a second fixing part 74c, and a third fixing part 74d for fixing the drain socket 30 to the toilet body 2 by a fixing member 31. Since these fixing parts are fixed to the rear part 2a of the toilet body 2 by the fixing member 31, the drain socket 30 can be removed from the rear (rear part 2a side) of the toilet body 2. This makes it easier to remove the drain socket 30 and improves maintainability.

[0039] Furthermore, according to the flush toilet 1 of one embodiment of the present invention, since at least three fixing parts are provided for the drain socket 30, the load of the drain socket 30 can be supported by the fixing member 31 even if the position of the drain pipe installed in the wall is off from the reference. This ensures a good seal between the drain socket 30 and the drain pipe.

[0040] Furthermore, according to the flush toilet 1 of one embodiment of the present invention, the first fixing portion 74b of the drain socket 30 is provided below the central axis CL1 in the vertical direction of the downstream end of the drain socket 30, and the second fixing portion 74c and the third fixing portion 74d of the drain socket 30 are provided above the central axis CL1, so that the drain socket 30 can be stably fixed in the vertical direction. This ensures a good seal between the drain socket 30 and the drain pipe.

[0041] Furthermore, according to the flush toilet 1 of one embodiment of the present invention, the drain trap pipe 14 is connected by being inserted into the drain socket 30, and since the drain trap pipe 14 and the drain socket 30 are not fixed by the fixing member 31, if an error occurs in the front-to-back direction, the error can be absorbed by shifting in the front-to-back direction.

[0042] Furthermore, according to the flush toilet 1 of one embodiment of the present invention, the fixing member 31 comprises an elastically deformable rubber bush 31a, a nut 31b embedded in the rubber bush 31a, a bolt 31c screwed into the nut 31b, and a washer 31d that abuts against the fixing part of the drain socket 30. When the bolt 31c is tightened, the nut 31b moves and the rubber bush 31a elastically deforms, thereby fixing the drain socket 30 to the toilet body 2. Thus, the drain socket 30 can be easily fixed to the toilet body 2.

[0043] Although the flush toilet 1 according to one embodiment of the present invention has been described as a wall-mounted flush toilet, the present invention is not limited to this form, and may also be applied to a floor-standing flush toilet fixed to the floor.

[0044] 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]

[0045] 1: Flush toilet 2: Toilet bowl 2a: Rear part of the toilet bowl body 2c: Mounting holes for the toilet bowl 12: Bowl section 14: Drain trap pipe 14a: Inlet of drain trap pipe 14b: Rising pipe for drain trap piping 14c: Top of drain trap pipe 14d: Rear conduit for drain trap conduit 14e: Outlet end of drain trap pipe 30: Drain socket 31: Fixing member 31a: Rubber bushing 31b: Nut 31c: Bolt 31d: Washer 70: Drain socket connection part on the toilet side 70a: Packing 72: Drainage channel section of drain socket 74: Drain socket connection on the drain pipe side 74a: Main body 74b: 1st fixed part 74c:Second fixed part 74d: Third fixed part 74e: Insertion hole 74f: Support part 74g: downstream end CL1: Vertical central axis CL2: Center axis in the left-right direction W: Wall surface

Claims

1. A flush toilet connected to a drainpipe located on the wall, A toilet bowl body comprising a bowl section for receiving waste, a spout for discharging cleaning water into the bowl section, and a drain trap pipe connected to the lower part of the bowl section and extending upward and rearward, A drain socket that connects the above drain trap pipe to the above drain pipe, A fixing member for fixing the drain socket to the toilet bowl body, It has, The above-mentioned drain socket is provided with a fixing part for fixing the drain socket to the toilet bowl body by the fixing member, and this fixing part is fixed to the back of the toilet bowl body by the fixing member, characterized in that the toilet bowl is a flush toilet.

2. The flush toilet according to claim 1, wherein at least three fixing parts for the drain socket are provided.

3. The flush toilet according to claim 2, wherein at least one of the fixing parts of the drain socket is provided above the central axis in the vertical direction of the downstream end of the drain socket, and at least one of the fixing parts of the drain socket is provided below the central axis.

4. The flush toilet according to any one of claims 1 to 3, wherein the drain trap pipe is connected by being inserted into the drain socket.

5. The above-mentioned fixing member comprises an elastically deformable rubber bushing, a nut embedded in the rubber bushing, a bolt screwed onto the nut, and a washer that abuts against the fixing portion of the drain socket, wherein when the bolt is tightened, the nut moves and the rubber bushing elastically deforms, thereby fixing the drain socket to the toilet bowl body, as described in claim 1.

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