JPH1161947A - Freezing prevention device of water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a freezing prevention device easy to use and hard to make damage with good controllability. SOLUTION: After a freezing prevention outlet 32 for allowing water to flow out for freezing prevention is provided to the bottom of a washing water tank 18 storing washing water for washing a water closet main body inside thereof separately from a main discharge port 26 for washing the water closet main body, water from the freezing prevention outlet 32 can be led to the inside of the water closet main body through a leading passage. A pop-up valve body 34 for opening and closing the freezing prevention outlet 32 is provided thereto, and the valve body 34 is connected to an operating section 38 through a pop-up mechanism 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing freezing of a toilet bowl, and more particularly to a freezing device of a flow type.

[0002]

2. Description of the Related Art In a cold region, there is a problem that the water in a basin or flush water tank of a toilet body may be frozen, especially at night when the temperature is low. During the nighttime, draining of water from piping and washing water tanks, warming of a water reservoir of a toilet body with a heater, or freezing is prevented by continuing to flow a small amount of water.

FIG. 9 shows an example of a conventional freezing prevention device of the latter flow type. In the figure, reference numeral 200 denotes a flush water tank for storing flush water for flushing the toilet, and a bottom portion thereof has a main discharge port 202 for flushing flush water inside the flush water tank 200 toward the toilet body at once. , A float valve 204 for opening and closing the main outlet 202 is provided. On the other hand, on the outer surface of the side wall of the washing water tank 200, an operation lever 206 as an input unit of an operation unit for performing a washing operation of the toilet body is provided.

[0004] An L-shaped operation shaft 208 extends from the operation lever 206 into the washing water tank 200.
The tip and the float valve 204 are connected by a chain 210, and when the operation lever 206 is rotated, the float valve 204 is lifted by the chain 210 and the main outlet 2 is opened.
02 is opened, and the washing water inside the washing water tank 200 is discharged to the toilet body side vigorously.

On the outer surface of the side wall of the washing water tank 200, there is provided a flow handle 212 for keeping the washing water inside the washing water tank 200 flowing to the toilet body little by little.

On the other hand, a flow valve 214 operated by the flow handle 212 is provided inside the cleaning water tank 200, and the cleaning water in the cleaning water tank 200 passes through the flow valve 214 and further flows through the flow valve 214. The fluid flows into the overflow pipe 218 via a hose 216 connected to the valve 214, and is guided to a rim portion of the toilet body.

However, in the case of this type of anti-freezing device, there is a problem in terms of operability such that the user does not know how far to turn the flow handle 212, and the user fully fills the flow handle 212 with a strong force. By turning the shaft, the shaft portion following the flow handle 212, the flow valve portion 214, and the like are liable to be broken or damaged.

In the case of this apparatus, the washing water tank 200
There is a problem in that it is necessary to attach the flow handle 212 and the flow valve portion 214 to the side wall portion and connect the flow valve portion 214 to the overflow pipe 218 with the hose 216.

[0009]

SUMMARY OF THE INVENTION The apparatus for preventing freezing of a toilet according to the present invention has been devised to solve such a problem. According to the first aspect of the present invention, there is provided the anti-freezing device according to claim 1, further comprising:
In addition to a main discharge port for washing the toilet body, an antifreeze outlet capable of discharging an amount of water necessary for antifreeze is provided, and water from the antifreeze outlet is passed through the guide passage through the guide passage. Provided to guide into the body, and provided with a pop-up valve to open and close the outlet at the anti-freezing outlet,
The valve body is connected to an operation unit via a pop-up mechanism.

According to a second aspect of the present invention, in the first aspect, a container-shaped outlet member forming the main outlet is provided at a bottom portion of the washing water tank. An outlet for freezing prevention is formed, and an internal passage of the outlet member connecting the main outlet and the outlet for freezing prevention is the guide passage.

According to a third aspect of the present invention, a notch is formed in an overflow pipe in a washing water tank for accommodating washing water for washing a toilet body, and the notch is formed in a portion where the notch is formed. The cover is mounted so as to be movable between an outflow position for opening the inside of the tank and a non-outflow position for closing the notch.

According to a fourth aspect of the present invention, in the freeze prevention device according to the third aspect, a notch is formed in the cover, and the notch on the cover and the notch on the overflow pipe overlap each other. And a non-outflow position in a non-overlapping state.

According to a fifth aspect of the present invention, in the fourth aspect, the notch on the overflow pipe side is formed at an upper end of the overflow pipe, and the cover is fitted to an upper end of the overflow pipe. The cover is in the form of a cap, and the cover is moved between the outflow position and the non-outflow position by a rotation operation.

According to a sixth aspect of the present invention, there is provided an antifreezing device, wherein the overflow pipe in the flush water tank for accommodating the flush water for flushing the toilet body has a laterally projecting form in which the tip is closed and the inside communicates with the overflow pipe. A valve body that forms a branch-like portion and has an antifreezing outlet capable of allowing an amount of water necessary for antifreezing to flow out on the upper surface of the branch, and that opens and closes the antifreezing outlet by vertical movement. And the valve body is connected to the operation unit.

In a preferred embodiment of the present invention, a float valve is provided at the bottom of a flush water tank for storing flush water for flushing the toilet body, the float valve being for opening and closing a main discharge port for flushing the flush body. A communication pipe that penetrates through the washing water tank and communicates with the downstream side of the main discharge port is fixedly mounted so as to move integrally with the float valve.
The present invention is characterized in that an outlet for freezing prevention capable of flowing out an amount of water required for preventing freezing is formed, and the outlet is opened and closed by a valve body, and the valve body is connected to the operation unit.

According to the eighth aspect of the present invention, there is provided an antifreezing apparatus according to the sixth aspect.
In any one of the above, the main operation shaft of the main operation portion for opening and closing the float valve is formed into a hollow cylindrical shape, and the opening and closing valve for opening and closing the antifreezing outlet is operated inside the main operation shaft. The second operation shaft is inserted so as to be relatively movable with respect to the main operation shaft, and the valve body is connected to a distal end portion of the second operation shaft protruding from the main operation shaft via a transmission member such as a chain. And

[0017]

As described above, the antifreezing device according to the first aspect of the present invention is provided with an antifreezing outlet at the bottom of the washing water tank separately from the main outlet, and a pop-up valve is attached thereto. This is connected to the operation unit via a pop-up mechanism. In the case of this anti-freezing device, the operation for draining or stopping the water for anti-freezing is simple, easy to understand, and easy to operate. There are good advantages.

According to a second aspect of the present invention, there is provided an antifreezing device provided with a container-like discharge port member forming the main discharge port at the bottom of the washing water tank. Outlets are formed, and they are communicated with each other through an internal passage of an outlet member serving as a guide passage. According to this device, water flowing out of an antifreeze outlet is guided to the toilet body. The guide passage does not need to be provided separately from the passage for guiding the toilet flush water from the main outlet to the toilet main body, and the freezing prevention outlet is provided through the passage for guiding the toilet flush water from the main drain to the toilet main body. Effluent from the toilet can be guided to the toilet body.

According to a third aspect of the present invention, a notch is formed in the overflow pipe, and a cover for opening or closing the notch in the washing water tank is mounted. It is only necessary to provide a notch and attach a cover to the notch, and the advantage that the structure of the apparatus is simple and the installation is easy is obtained. In the device according to the third aspect, it is desirable to provide an operation unit for operating the cover, and to arrange the operation unit at a position that can be operated from the outside.

In this apparatus, a cutout portion is formed in the cover, and the cutout portion on the cover side and the cutout portion on the overflow pipe side are overlapped with each other. It can be made to be movable between (claim 4).

The cover may be in the form of a cylindrical cap, rotatably fitted to the upper end of the overflow pipe, and provided with a cutout corresponding to the upper end of the overflow pipe. (Claim 5). In this case, the water in the washing water tank can be easily caused to flow out of the notch portion of the overflow pipe or to stop flowing out simply by rotating the cap-type cover.

According to a sixth aspect of the present invention, there is provided an antifreezing device having a laterally protruding branch portion formed in an overflow pipe, and having an antifreeze outlet and a valve element for opening and closing the branch port on the branch portion. In this device, the water in the flush water tank can be made to flow to the toilet body side by opening the valve body, and freezing can be effectively prevented.

Further, in this device, the structure of the overflow pipe only needs to be slightly changed, the device configuration is simple, and there is no need to mount a flow valve for preventing freezing on the side wall of the washing water tank.

According to a seventh aspect of the present invention, a communication pipe is provided in a state of penetrating the float valve and moving integrally with the float valve, and the communication pipe has an antifreeze outlet formed therein. The outlet is opened and closed by a valve body. In this device, the cleaning water in the tank can be made to flow by opening the valve body so that freezing is effectively prevented. Can be.

Also in this device, since the float valve is provided with a freezing prevention outlet and a valve body for opening and closing the same, a valve body for flowing water for freezing prevention is provided on the side wall of the washing water tank. No need to install.

In the apparatus according to claim 6, the main operation shaft of the main operation portion for opening and closing the float valve has a hollow cylindrical shape, and the second operation member for operating the valve body inside the hollow operation shaft. The shaft can be inserted through the shaft so as to be relatively movable, and the valve element on the distal end of the second operation shaft protruding from the main operation shaft can be connected via a transmission member such as a chain (claim 8).

In the case of this device, an operating portion for operating the valve body can be provided by using a mounting hole for mounting the main operating portion provided on the side wall of the washing water tank or the like. When the operation section is attached, the attachment is simple, and there is an advantage that it is not necessary to perform special processing on the side wall and the like of the washing water tank.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a Western-style toilet, 12 denotes a toilet body, 14 denotes a toilet seat, and 16 denotes a toilet lid. Reference numeral 18 denotes a flush water tank for storing flush water of the toilet body 12, and tap water is supplied to the inside through a water supply pipe 20. An operation lever 22, which is an input unit of a main operation unit for performing a cleaning operation on the toilet body 12, is rotatably attached to an outer surface of a side wall of the cleaning water tank 18.

[0029] As shown in FIG.
At the bottom, there is provided a main outlet 26 for draining flush water from the tank 18 toward the toilet body 12 at once, and a float valve 28 for opening and closing the main outlet 26.

The float valve 28 is connected via a chain 30 to the tip of an L-shaped main operation shaft 76 (see FIG. 5) extending into the tank following the operation lever 22. The float valve 28 is lifted by the rotation operation of the operation lever 22, and the washing water in the tank 18 is discharged to the toilet main body 12 through the main discharge port 26 at once.

At the bottom of the washing water tank 18, an anti-freezing outlet 32 for discharging water in the washing water tank 18 little by little separately from the main discharge port 26 is provided. , A pop-up valve element 34 is attached so as to be openable and closable.

The water flowing out of the outlet 32 flows into the toilet body 12 through a guide passage inside the pipe 35 such as a hose, such as a rim water passage provided along the rim of the toilet body 12.

The valve body 34 is connected to a push-type operation unit 38 via a pop-up mechanism 36. The pop-up mechanism 36 is slidably inserted into a flexible and non-stretchable outer tube 40 as a transmission member for transmitting the pushing operation force of the operation unit 38 to the valve body 34 and one end of the outer tube 40. The portion 38 has a flexible and non-stretchable inner wire 44 having the other end connected to the pin 42. The operating section 38 is always positioned at an upwardly projecting position by a spring means (not shown).

The pop-up mechanism 36 includes an operation unit 38
Is pushed upward, the pin 42 is pushed upward, and the shaft portion 45 at the center of the valve body 34 is pushed up integrally with the valve body 34. The pushed-up valve element 34 is connected to the position holding mechanism 4.
When the operation unit 38 is pressed again again by the operation unit 38, the position holding by the position holding mechanism 43 is released and the operation unit 38 is lowered, and the outlet 32 is closed.

Here, the position holding mechanism 43 is composed of a cylindrical housing 46 and a fixing member 48 which moves up and down integrally with the shaft portion 45.
And a movable member 50 that can move up and down relative to the shaft portion 45 between the fixed member 48 and a stopper portion 52 provided on the shaft portion 45. When the valve body 34 rises integrally with the valve body 34, the movable member 50 is locked to the locking portion 54 inside the housing 46 and is prevented from descending, whereby the valve body 34 opens the raised position, that is, the outlet 32. Held in position.

Subsequently, when the pin 42 is pushed up again by the pushing operation of the operating portion 38, the locking of the movable member 50 with the locking portion 54 is released, and the movable member 50 is moved together with the shaft portion 45 and the valve body 34. Move down. Since the pop-up mechanism 36 is conventionally known, further detailed description is omitted here.

The pop-up mechanism 36 in the above example is merely an example, and can be configured in other forms. Further, in this example, the valve body 34 opens and closes each time the operation unit 38 is pushed, but when the operation unit 38 is pushed in, the valve body 34 is lifted by the operation force, and By pulling up the operating portion 38, the valve body 34 may be lowered, and the outlet 32 may be closed.

FIG. 3 shows an example. In this example, the operation unit 38 is a pop-up mechanism 36 including a link mechanism.
Is connected to the valve body 34, the valve body 34 is opened by pushing the operating portion 38, and the valve body 34 is closed by pulling the operating portion 38 upward.

According to the anti-freezing device of this embodiment, the operation for flowing or stopping the flow of water for preventing freezing is simple and easy to understand, and the operability is good.

FIG. 4 shows another embodiment of the present invention. In this embodiment, a flat box-shaped (container-shaped) outlet member 55 is attached to the bottom of the washing water tank 18 and the outlet is provided. The main outlet 26 and the anti-freezing outlet 32 are formed together in the member 55, and they are communicated with each other through an internal passage of the outlet member 55. That is, in this example, the internal passage of the discharge port member 55 forms a guide passage for guiding the effluent from the anti-freezing outlet 32 to the toilet body 12 side.

In this embodiment, a valve element 34 for opening and closing the antifreeze outlet 32 is connected to an operation section 38 via a pop-up mechanism 36. In this example, the pop-up mechanism 3
Reference numeral 6 denotes a pop-up mechanism shown in FIG. 2, that is, a pop-up mechanism having an outer tube 40 and an inner wire 44. The illustration of the position holding mechanism is omitted. This position holding mechanism can be provided on the operation section 38 side, or can be provided on the valve body 34 side in the same configuration as that of FIG. Furthermore, the pop-up mechanism 36 can be constituted by a link mechanism shown in FIG.

According to the anti-freezing device of this embodiment, the guide passage for guiding the water flowing out of the anti-freezing outlet 32 to the toilet main body 12 is provided, and the toilet flush water from the main outlet 26 is supplied to the toilet main body 12. It is not necessary to separately provide the guide passage, and the effluent from the freeze-prevention outlet 32 can be guided to the toilet body 12 through the passage that guides the toilet flush water from the main outlet 26 to the toilet body 12.

Next, still another embodiment of the present invention will be described with reference to FIGS. In FIG. 5, reference numeral 56 denotes an overflow pipe inside the washing water tank 18. As shown in FIG. 6, a vertical slit (notch portion) 58 extending vertically and penetrating the overflow pipe 56 in and out is provided at the upper end thereof. Is formed.

Reference numeral 60 denotes a cylindrical cap (cover), which is fitted to the upper end of the overflow pipe 56 downward and rotatably. As shown in FIG. 6, the cap 60 also has a slit (a cutout) 62 that is vertically oriented and that passes through the cap 60 in and out of the cap 60, corresponding to the slit 58 of the overflow pipe 56.

The lower and upper surfaces of the cap 60 are open, and a cross-shaped connecting portion 64 is formed on the upper surface, and the operating shaft 66 is connected to the center of the connecting portion 64. A rotary operation knob 68 is provided at the upper end of the operation shaft 66.
The knob 68 is provided with the washing water tank 18.
, Specifically, it is arranged so as to be exposed inside the toilet bowl 70. And rotate this knob 68,
As shown in FIG. 6A, when the slit 62 on the cap 60 and the slit 58 on the overflow pipe 56 overlap, water in the washing water tank 18 flows out.

In FIG. 5, reference numeral 72 denotes a ball tap for supplying tap water from the water supply pipe 20 to the inside of the washing water tank 18 to automatically maintain a full state, and 74 denotes a float in the ball tap 72. Reference numeral 76 denotes an L-shaped operation shaft (main operation shaft) extending from the operation lever 22 to the inside of the washing water tank 18.
0 is connected to one end.

According to the freeze prevention apparatus of this embodiment, the overflow pipe 56 is provided with the slit 58 and the cap 6 is provided therein.
The device can be constructed simply by mounting 0, the structure of the device is simple, and its mounting is easy.

By simply rotating the knob 68, the water in the washing water tank 18 can be easily discharged from the slit 58 of the overflow pipe 56 or stopped.

FIG. 7 shows still another embodiment of the present invention. In this example, a laterally protruding branch portion 78 having a closed end and an internal portion communicating with the overflow tube 56 is formed on the overflow tube 56, and the branch portion 78 is formed.
A freezing prevention outlet 80 is provided on the upper surface of the
Is opened and closed by a valve element 82. The valve body 82 is accommodated in the valve casing 84 so as to be movable up and down, that is, openable and closable.

The valve element 82 is connected to the operation unit via the chain 30. Here, the operation unit can be provided in a form shown in FIG. 8 described later. This will be described in detail later.

Although the valve element 82 having an elliptical cross section is used in FIG. 7A, a valve element 86 having a square cross section shown in FIG. It is.

According to the freeze prevention device of this embodiment, the valve 8
By opening the valve 2, the water in the flush water tank 18 can flow toward the toilet body 12, and freezing can be effectively prevented.

In the case of this device, the overflow pipe 5
There is an advantage that the structure of the apparatus 6 can be changed only slightly, the apparatus configuration is simple, and there is no need to attach a flow valve for preventing freezing to the side wall of the washing water tank 18.

FIG. 8 shows another embodiment of the present invention. In the figure, reference numeral 88 denotes a communication pipe which penetrates through the float valve 28 and communicates the inside of the washing water tank 18 with the downstream side of the main discharge port 26, and is provided so as to move integrally with the float valve 28. The communication pipe 88 has an antifreezing outlet 90 formed at a predetermined position in the longitudinal direction.

The communication pipe 88 is connected to the anti-freezing outlet 90.
Is configured as a valve casing 92,
The valve body 94 is accommodated therein. The valve body 94 opens and closes the antifreezing outlet 90. The valve body 94 has a protruding blade 96 on the outer peripheral portion.
At predetermined intervals in the circumferential direction, and is normally urged by a spring 98 in the valve closing direction.

The valve body 94 has a chain 3 as a transmission member.
0 are connected at one end. The other end of the chain 30 is connected to an operation shaft (second operation shaft) 100 in an operation unit that opens and closes the valve body 94.

In this embodiment, the operation shaft (main operation shaft) 76 of the main operation portion for opening and closing the float valve 28 is formed in a cylindrical shape, and the operation shaft 100 is inserted inside the operation shaft so as to be relatively movable in the axial direction. Have been.

The chain 30 is connected to the tip of the operation shaft 100 projecting from the operation shaft 76. On the other hand, the other end side of the operation shaft 100 is inserted through the operation lever 22 and protrudes to the outer surface side of the washing water tank 18, and a knob 102 which is an input portion of the operation force is formed at the protruding end.

In the case of the apparatus of this embodiment, when the operation lever 22 is rotated, the communication pipe 88 and the float valve 28 connected to the distal end of the operation shaft 76 via the chain 30 are lifted, and the cleaning water in the cleaning water tank 18 is washed. Water is discharged from the main outlet 26 to the toilet body 12 at a stroke, and the toilet body 12 is washed.

The user operates the operation shaft 100 by holding the one knob 102.
8 is pulled rightward in FIG. 8, only the valve element 94 is lifted against the urging force of the spring 98, and the antifreezing outlet 90 is opened. Thereby, the washing water in the washing water tank 18 is caused to flow toward the toilet body 12 through the communication pipe 88.

A stopper may be provided on the operation shaft 100 or the knob 102, and the stopper may be held at the pulling position by the stopper by rotating it after pulling it.

In the apparatus shown in FIG.
The operation unit for operating the operation unit 6 can be provided in a form shown in FIG. 8, that is, in a form having an operation shaft 100 and a knob 102.

In the apparatus shown in FIG. 8, the cleaning water in the tank 18 can flow out and flow by opening the valve element 94, and freezing can be effectively prevented.

Also in this apparatus, since the freezing prevention outlet 90 and the valve body 94 for opening and closing the same are provided in the float valve 28, water for freezing prevention flows on the side wall of the washing water tank 18. There is an advantage that it is not necessary to attach a valve body.

Further, in the case of this apparatus, an operation section (second operation section) for operating the valve element 94 is mounted by using a mounting hole for mounting the main operation section provided on the side wall of the washing water tank 18. When the operation section for operating the valve element 94 is mounted, the operation is simple, and it is not necessary to perform special processing on the side wall and the like of the washing water tank 18 again.

Although the embodiments of the present invention have been described in detail, this is merely an example, and the present invention can be implemented in variously modified forms without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a view of a Western-style toilet provided with an antifreezing device according to one embodiment of the present invention.

FIG. 2 is a diagram of the freeze prevention device.

FIG. 3 is a diagram of an antifreezing device according to another embodiment of the present invention.

FIG. 4 is a diagram of a freeze prevention device according to still another embodiment of the present invention.

FIG. 5 is a view showing still another anti-freezing device of the present invention together with the inside of a washing water tank.

FIG. 6 is a view of a main part of the freeze prevention device of FIG. 5;

FIG. 7 is a diagram of an antifreezing device according to still another embodiment of the present invention.

FIG. 8 is a view of an antifreezing device according to still another embodiment of the present invention.

FIG. 9 is a diagram of a conventional anti-freezing device.

[Explanation of symbols]

 12 toilet body 18 flush water tank 26 main outlet 28 float valve 30 chain 32, 80, 90 anti-freeze outlet 34, 82, 86, 94 valve body 35 tube 36 pop-up mechanism 38 operating part 55 outlet member 56 overflow Pipes 58, 62 Slits (cutouts) 60 Caps (covers) 76 Operating shafts (main operating shafts) 78 Branches 88 Communication tubes 100 Operating shafts (second operating shafts) 102 Knob

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Nao Ikegawa 5-1-1 Koie Honcho, Tokoname, Aichi Prefecture Inside Inax Co., Ltd. (72) Takeshi Shihoda 5-1-1 Koie Honmachi, Tokoname, Aichi Prefecture Inax Co., Ltd. (72) Inventor Keisuke Hirade 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inside Inax Co., Ltd.

Claims (8)

[Claims] 1. A freezing unit capable of discharging an amount of water necessary for preventing freezing separately from a main discharge port for washing a toilet body at a bottom of a washing water tank containing washing water for washing the toilet body. In addition to the provision of an anti-freeze outlet, the water from the anti-freeze outlet is guided through the guide passage into the toilet body, and the anti-freeze outlet has a pop-up type that opens and closes the outlet. Wherein the valve body is connected to the operation unit via a pop-up mechanism. 2. The cleaning water tank according to claim 1, wherein a bottom of the washing water tank is provided with a container-shaped discharge port member forming the main discharge port, and the discharge port member has the freezing prevention outlet formed therein. A freezing prevention device for a toilet bowl, wherein an inner passage of the outlet member that communicates between the main outlet and an antifreezing outlet is the guide passage. 3. A notch is formed in an overflow pipe in a washing water tank for accommodating washing water for washing a toilet body, and an outflow opening the notch into the tank is formed at a location where the notch is formed. A device for preventing freezing of a toilet bowl, wherein a cover is mounted so as to be movable between a position and a non-outflow position for closing the notch. 4. The cover according to claim 3, wherein a notch is formed in the cover, and the cover has a cut-out portion in which the notch on the cover side and the notch on the overflow pipe side overlap each other. A freezing prevention device for a toilet bowl, which is movable between a non-spill position and an overlapping state. 5. The cap according to claim 4, wherein the notch on the overflow pipe side is formed at an upper end of the overflow pipe, and the cover is formed in a cap shape to be fitted to an upper end of the overflow pipe. Characterized in that the device is moved between the outflow position and the non-outflow position by a rotation operation. 6. An overflow pipe in a flush water tank for accommodating flush water for flushing a toilet body, wherein a laterally protruding branch portion having a closed end and a communicated interior with the overflow pipe is formed. A freezing-prevention outlet capable of flowing out an amount of water necessary for freezing prevention is provided on the upper surface of the branch portion, and a valve body that opens and closes the freezing-prevention outlet by up and down operation is provided. An antifreeze device for a toilet bowl, which is connected to an operation unit. 7. A flush valve, which is provided at the bottom of a flush water tank for accommodating flush water for flushing the toilet body and opens and closes a main discharge port for flushing the flush body, penetrates through the float valve and provides the flush water. A communication pipe for communicating the inside of the tank with the downstream side of the main discharge port is fixed so as to move integrally with the float valve, and a freezing pipe capable of flowing an amount of water necessary for preventing freezing into the communication pipe. A device for preventing freezing of a toilet bowl, wherein a preventive outlet is formed, the outlet is opened and closed by a valve body, and the valve body is connected to an operation unit. 8. The freezing prevention flow according to claim 6, wherein a main operation shaft of a main operation portion for opening and closing the float valve is formed in a hollow cylindrical shape. A second operating shaft for operating a valve for opening and closing the outlet is inserted so as to be relatively movable with respect to the main operating shaft, and the valve body is connected to the tip of the second operating shaft protruding from the main operating shaft. An apparatus for preventing freezing of a toilet bowl, which is connected via a transmission member.