JP6771742B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet equipped with a water storage tank.

Conventionally, a bowl portion in which a rim spout and a jet spout are formed and a water storage tank for storing water are provided. Washing water is directly supplied from the tap to the rim spout, and the jet spout is inside the water storage tank. There is known a water-washing urinal in which the washing water stored in the water is pressurized and supplied (for example, Patent Document 1). The water storage tanks of these flush toilets are provided with an intake port for replacing air so as to suppress an increase or decrease in internal pressure.

Japanese Unexamined Patent Publication No. 2013-227852

In the above-mentioned conventional water storage tank, a water passage pipe for discharging the wash water overflowing from the water stop water level in the water storage tank to the toilet body is provided, but before the inside of the water passage pipe into which the overflowed wash water flows is filled with the wash water. When the float floats and the intake port is sealed, there is no escape place for air in the water storage tank. As a result, the air that has no escape area passes through the water pipe in the form of being pushed out from the water storage tank, and when it is discharged to the toilet bowl body, an abnormal noise is generated, which causes discomfort to the user.

The present invention has been made to solve the above-mentioned problems, and is used in a flush toilet provided with a water storage tank provided with an intake port for replacing air so as to suppress an increase or decrease in internal pressure. An object of the present invention is to provide a flush toilet that suppresses the generation of abnormal noise when the flush water in the water storage tank is discharged to the toilet body through an overflow pipe.

The flush toilet according to one aspect of the present invention includes a toilet body, a water storage tank for storing wash water to be supplied to the toilet body, a water flow pipe connecting the toilet body and the water storage tank, and the water storage tank. It is provided with an intake port that takes in air into the inside and a check valve that moves up and down according to the water level in the water storage tank to open and close the intake port, and the water passage pipe is inside the water storage tank when cleaning the toilet bowl. A wash water supply pipe for supplying the wash water to the toilet body, and one end of the pipe is opened above the water stoppage level in the water storage tank to allow the wash water in the water storage tank to escape to the toilet body. The check valve has an overflow pipe capable of forming a check valve, and the buoyancy acting on the check valve depending on the water level in the water storage tank and the own weight of the check valve cause the entire check valve to be immersed in water. It is configured to be balanced in the open state.

According to this configuration, the check valve is configured so that the buoyancy acting on the check valve depending on the water level in the water storage tank and the weight of the check valve are balanced when the entire check valve is immersed in water. There is. That is, since the check valve is configured to start moving upward after at least the entire check valve is immersed in water, the intake port is closed after the overflow pipe is filled with wash water as much as possible. To. Therefore, since the intake port is closed after the air in the water storage tank is almost discharged, it is possible to suppress the generation of abnormal noise when the washing water in the water storage tank is discharged to the toilet bowl body through the overflow pipe. Can be done.

In the flush toilet according to one aspect of the present invention, preferably, the check valve is a check valve main body that moves up and down depending on the water level in the water storage tank, and when the check valve closes the intake port portion. The check valve has a valve body that comes into contact with the intake port portion, and the check valve body is made of at least two or more materials having different specific gravities to adjust the specific gravity.

In general, the buoyancy acting on the check valve is due to the specific gravity of the check valve and the size of the check valve. Regarding the specific gravity, there is not always one kind of material that allows fine selection of specific gravity depending on the size of the specific gravity, so when designing by adjusting the check valve to the target buoyancy, it is reversed. It is difficult to adjust the specific gravity of the check valve with one type of material. Therefore, when adjusting the buoyancy acting on the check valve against water to the target buoyancy, a method of adjusting the size of the check valve is well known.
However, with the recent increase in the functionality of flush toilets, restrictions on the installation space have arisen, and it has become difficult to design by increasing the size of the check valve and adjusting it to the desired buoyancy. There is. Also, by changing the size of the check valve, it will be necessary to change the design of other configurations of the water storage tank, so when adjusting to the target buoyancy, do not change the size of the check valve as much as possible. It is preferable that it can be adjusted to.
According to this configuration, the check valve body is made of at least two or more materials having different specific gravities to adjust the specific gravity, and the buoyancy acting on the check valve is adjusted more reliably. Can be designed. Further, since it is not necessary to change the size of the check valve in order to adjust the buoyancy acting on the check valve, the degree of freedom in designing the water storage tank can be increased.

In the flush toilet according to one aspect of the present invention, preferably, the intake port portion includes a valve seat that comes into contact with the check valve, and a storage portion for storing wash water above the valve seat. Has.

According to this configuration, in a flush toilet in which the flush valve is easily overflowed from the intake port by configuring the check valve as described above, the check valve is above the valve seat before it comes into contact with the valve seat. By storing the wash water that has overflowed into the storage portion provided in the intake port, it is possible to prevent the wash water from overflowing to the outside of the water storage tank.

According to the present invention, in a flush toilet provided with a water storage tank provided with an intake port for replacing air so as to suppress an increase or decrease in internal pressure, the flush water in the water storage tank passes through an overflow pipe to the toilet body. It is possible to suppress the generation of abnormal noise when the water is discharged to the toilet.

It is a block diagram which shows the flush toilet which concerns on one Embodiment of this invention. It is a top view which shows the valve unit of the flush toilet which concerns on one Embodiment of this invention. It is a partial cross-sectional view of III-III of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.

<Composition of flush toilet>
First, a flush toilet according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram showing a flush toilet according to an embodiment of the present invention.

As shown in FIG. 1, the flush toilet bowl 100 according to the embodiment of the present invention is arranged on the floor surface (not shown) of the toilet room and behind the toilet bowl body 200. The functional unit 300 is provided.

The toilet bowl body 200 has a bowl portion 210 that receives filth, and a drain trap pipeline 220 that extends rearward from the bottom portion of the bowl portion 210. The bowl portion 210 is formed with a rim spout 212 for rim spouting and a jet spout 214 for jet spouting. The rim spout 212 is formed behind the upper left side of the bowl 210, and discharges wash water along the upper edge of the bowl 210. The jet spout 214 is formed at the bottom of the bowl and discharges wash water toward the drain trap line 220. The drain trap pipeline 220 forms a water seal and communicates with the sewage pipe (not shown) of the building frame via a drain socket (not shown).

The functional unit 300 includes a valve unit 600 controlled by a control unit (not shown) for discharging rim water and jet water, a water storage tank 800 provided downstream of the valve unit 600 and storing washing water, and a water storage tank 800. A pressurizing pump 900 is provided downstream of the water storage tank 800 to pressurize the washing water.

A water supply channel 320 for supplying wash water from a water supply source (not shown) is connected to the upstream side of the valve unit 600. A rim-side water supply channel 340 for supplying wash water to the rim spout 212 and a tank-side water supply channel 360 for supplying wash water to the water storage tank 800 are connected to the downstream side of the valve unit 600. ..

Further, the valve unit 600 includes a constant flow valve 620, a diaphragm type main valve 640 provided downstream of the constant flow valve 620, a water supply channel switching valve 660 provided downstream of the main valve 640, and the water supply channel. It has a vacuum breaker 680 provided downstream of the switching valve 660.
The constant flow valve 620 keeps the flow rate of the washing water flowing from the water supply channel 320 into the constant flow valve 620 toward the downstream side. The main valve 640 switches between spouting and stopping water at the rim spout 212 and the jet spout 214 by opening and closing the main valve 640. The water supply channel switching valve 660 supplies wash water to the rim side water supply channel 340 or the tank side water supply channel 360. Further, the water supply channel switching valve 660 can supply cleaning water to both the rim side water supply channel 340 and the tank side water supply channel 360 at the same timing, and the cleaning water is supplied to the rim side water supply channel 340 and the tank side water supply channel 360. The proportion of the amount of water can be changed arbitrarily. The vacuum breaker 680 suppresses the backflow of the washing water to the upstream side, and is connected to the water storage tank 800 by the drainage channel 390.

The water storage tank 800 includes a tank body 820 that stores water, a water supply side check valve 840 that is provided in the tank body 820 and is connected to the tank side water supply channel 360, and a VB side check valve 860 that is connected to the drainage channel 390. Has.

A pump-side water supply channel 370 is connected to the lower part of the tank body 820, and a pressurizing pump 900 is connected to the downstream end of the pump-side water supply channel 370. Further, the pressurizing pump 900 and the jet spout 214 are connected by a jet-side water supply channel 380, and the pressurizing pump 900 pressurizes the washing water stored in the tank body 820 at the time of cleaning the toilet bowl to pressurize the washing water stored in the tank body 820. It is designed to supply to the jet spout 214 through 380.
Further, an upper end float switch (not shown) and a lower end float switch (not shown) are arranged inside the tank body 820 so that the water level in the tank body 820 can be detected. The upper end float switch is switched on when the water level in the tank body 820 reaches a predetermined reservoir water level, and the control unit detects this and closes the main valve 640. On the other hand, the lower end float switch is switched on when the water level in the tank body 820 drops to a predetermined water level, and the control unit detects this and stops the pressurizing pump 900.

The water supply side check valve 840 suppresses the backflow from the tank body 820 to the tank side water supply channel 360. The VB side check valve 860 suppresses the backflow from the tank body 820 to the drainage channel 390.

The tank body 820 is provided with an overflow spout 880 that opens above the water stop water level WL before the start of cleaning the toilet bowl in the tank body 820. Further, an overflow pipe 890 is provided for connecting the overflow spout 880 and the jet side water supply channel 380, and the washing water overflowing from the water stop water level WL in the tank body 820 is discharged from the overflow pipe 890 to the jet side water supply channel. It is possible to escape to the jet spout 214 through 380. Further, the overflow pipe 890 is provided with an OF side check valve 892 for suppressing the washing water flowing in the jet side water supply channel 380 from flowing back into the tank body 820 through the overflow pipe 890.

<Vacuum breaker configuration>
Next, the vacuum breaker of the flush toilet according to the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a top view showing a valve unit of a flush toilet according to an embodiment of the present invention.

The vacuum breaker 680 is provided downstream of the water supply channel switching valve 660 and has a rim side water inlet (not shown) leading to the rim side water supply channel 340 and a rim side valve body (not shown) that opens and closes the rim side water inlet. The rim side water flow path (not shown) into which the wash water that has passed through the rim side valve body flows in, and the rim side outlet 684a that causes the wash water that has passed through the rim side water flow path to flow out to the rim side water supply channel 340. And have. Further, as shown in FIG. 2, a cylindrical rim-side air inlet 685a is formed above the rim-side valve body.
Similarly, the vacuum breaker 680 has a tank-side water inlet (not shown) that is provided downstream of the water supply channel switching valve 660 and leads to the tank-side water supply channel 360, and a tank-side valve body that opens and closes the tank-side water inlet (not shown). (Not shown), the tank side water flow path (not shown) into which the wash water that has passed through the tank side valve body flows in, and the tank side that causes the wash water that has passed through this tank side water flow path to flow out to the tank side water supply channel 360. It has a water outlet 684b and. Further, as shown in FIG. 2, a cylindrical tank-side air introduction port 685b is formed above the tank-side valve body.
A water receiving portion 686 is formed around the rim-side air introduction port 685a and the tank-side air introduction port 685b so as to surround the rim-side air introduction port 685a and the tank-side air introduction port 685b.

The rim side valve body sits on the seat surface formed at the rim side water inlet due to its own weight when water is not flowing, and closes the rim side water inlet. At this time, the rim-side water channel and the rim-side air inlet 685a are communicated with each other. Further, when water is flowing, the rim side valve body is pushed upward by the force of the inflowing washing water, and is seated on the seat surface formed at the lower end of the rim side air introduction port 685a, and the rim side air introduction port. 685a is closed. At this time, the rim side water inlet and the rim side water outlet 684a are communicated with each other.
Similarly, the tank-side valve body sits on the seat surface formed at the tank-side water inlet due to its own weight when the water is not flowing, and closes the tank-side water inlet. At this time, the water flow path on the tank side and the air inlet 685b on the tank side are communicated with each other. Further, during water flow, the tank-side valve body is pushed upward by the force of the inflowing washing water, and is seated on the seat surface formed at the lower end of the tank-side air introduction port 685b, so that the tank-side air introduction port 685b is closed. At this time, the water inlet on the tank side and the water outlet on the tank side 684b are communicated with each other.

The water receiving portion 686 is formed so as to surround the outlet portions of the rim side air introduction port 685a and the tank side air introduction port 685b, and has a box shape with an open upper surface and an open upper surface. The water receiving portion 686 includes a rim side air introduction port 685a and a tank side air introduction port when the rim side valve body or the tank side valve body closes the rim side air introduction port 685a and the tank side air introduction port 685b. It is configured to receive the wash water that overflows from 685b.
Further, a drainage port 686a is opened on the bottom surface of the water receiving portion 686, and the drainage port 686a and the water storage tank 800 are connected by a drainage channel 390. As a result, the wash water overflowing from the rim side air introduction port 685a and the tank side air introduction port 685b enters the water receiving portion 686 and is drained from the drain port 686a to the water storage tank 800 through the drainage channel 390. Further, the facing surface of the water receiving portion 686 is inclined stepwise toward the drain port 686a.

<Construction of check valve>
Next, the VB side check valve of the flush toilet according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is a partial sectional view taken along line III-III of FIG.

As shown in FIG. 3, the tank main body 820 includes an introduction portion 850 that communicates the tank main body 820 and the drain port 686a.
The introduction portion 850 is directed from the communication flow path 852 that communicates the inside and the outside of the tank body 820, the intake port portion 854 provided at the upstream end of the communication flow path 852, and the inner wall of the communication flow path 852 to the inside. It has a throttle portion 856 that projects and narrows the cross-sectional area of the cross section orthogonal to the flow direction (vertical direction in FIG. 3) of the communication flow path 852. Further, a VB side check valve 860 is provided between the intake port portion 854 and the throttle portion 856. The VB side check valve 860 moves up and down depending on the water level in the water storage tank 800 to open and close the intake port portion 854.

The intake port portion 854 forms an intake port 854a, and by communicating with the drainage channel 390, intake air is taken from the drainage port 686a of the water receiving portion 686 to the tank body 820 via the drainage channel 390. Further, a valve seat 854b protruding toward the throttle portion 856 side is formed so as to surround the intake port 854a, and an intake port portion 854 is provided between the intake port 854a and the valve seat 854b by a VB side check valve 860. A storage unit 854c is provided that can store wash water when it is closed.
The throttle portion 856 projects inward from the inner wall of the communication flow path 852 to form a drawing opening having a circular horizontal cross section in the communication flow path 852.

The VB side check valve 860 can maintain watertightness between the check valve main body 862 that covers the throttle portion 856 from above and the valve seat 854b provided on the check valve main body 862 and in contact with the valve seat 854b. It has a valve body 864 and. Further, the VB side check valve 860 is configured so that the buoyancy acting by the water level in the tank body 820 and its own weight are balanced in a state where the entire VB side check valve 860 is immersed in water.
The check valve main body 862 is formed in a cylindrical shape having a horizontal cross section with the lower part open and the upper part closed, and is slidably provided between the intake port portion 854 and the throttle portion 856. Further, the outer peripheral edge of the check valve main body 862 is formed larger than the outer peripheral edge of the valve seat 854b.
With such a configuration, in a normal state, the check valve main body 862 is placed on the throttle portion 856 with the throttle portion 856 covered from above, while draining from the tank main body 820 via the communication flow path 852. When the water tries to flow back to the road 390, the water level of the washing water in the tank main body 820 rises and the washing water flows into the communication flow path 852 from the throttle portion 856. The buoyancy acting on the VB side check valve 860 and the VB side check valve when the water level of the washing water flowing in from the throttle portion 856 and accumulated in the communication flow path 852 rises to the upper end portion 862a of the check valve main body 862. The weight of the valve 860 is in balance. Then, when the water level of the washing water in the communication flow path 852 rises more than this, the buoyancy acting on the VB side check valve 860 overcomes the own weight of the VB side check valve 860 and the check valve main body 862 is pushed upward. Then, the valve body 864 of the VB side check valve 860 sits on the valve seat 854b of the intake port portion 854, maintains watertightness with the valve seat 854b, and closes the intake port 854a.

The VB side check valve 860 has a structure in which the buoyancy acted by the water level in the tank body 820 and its own weight are balanced when the entire VB side check valve 860 is immersed in water. The specific gravity is adjusted by forming the main body 862 from two kinds of materials having different specific gravities.
Specifically, as the material of the check valve main body 862, PP (polypropylene) having a specific gravity of 0.9 and talc (a type of silicate mineral, also known as talc) having a specific gravity of 2.7 are used in a concentration ratio of 8: 2. It is formed by mixing so as to become (PP: talc). With this configuration, the specific gravity of the check valve main body 862 is adjusted so that the buoyancy acting on the VB side check valve 860 depending on the water level in the tank main body 820 becomes the target buoyancy.

A part of the washing water that has flowed back above the valve seat 854b by the time the check valve body 862 is pushed upward by the water level in the tank body 820 and the intake port 854a is closed is stored in the storage section 854c. To. Then, when the water level in the tank body 820 drops and the VB side check valve 860 moves downward and the watertight state between the valve body 864 and the valve seat 854b is released, the inside of the storage unit 854c is released. The stored wash water flows out into the tank body 820.

<Effect>
Next, the action and effect of the flush toilet in the present embodiment will be described.

In the present embodiment, the VB side check valve 860 is configured so that the buoyancy acted by the water level in the tank body 820 and its own weight are balanced when the entire VB side check valve 860 is immersed in water. .. As a result, the intake port portion 854 is closed after the overflow pipe 890 is filled with wash water as much as possible. That is, since the intake port portion 854 is closed after the air in the water storage tank 800 is almost discharged, when the washing water in the water storage tank 800 is discharged from the toilet bowl main body 200 (jet spout 214) through the overflow pipe 890. It is possible to suppress the generation of abnormal noise.

Further, the VB side check valve 860 has a reverse structure so that the buoyancy acted by the water level in the tank body 820 and its own weight are balanced when the entire VB side check valve 860 is immersed in water. The specific gravity of the check valve main body 862 is adjusted by forming the check valve main body 862 by mixing two kinds of materials, PP (polypropylene) and talc, which have different specific gravities. As a result, the VB side check valve 860 can be adjusted and designed so as to have a target buoyancy without changing the size, so that the degree of freedom in designing the water storage tank 800 can be increased.

Further, a part of the washing water that has flowed back above the valve seat 854b by the time the check valve body 862 is pushed upward by the water level in the tank body 820 and the intake port 854a is closed is stored in the storage portion 854c. It is saved. As a result, it is possible to prevent the washing water from overflowing to the outside of the water storage tank 800.

Although the embodiments of the technology disclosed in the present application have been described above, the technology disclosed in the present application is not limited to the above.

In the above embodiment, the VB side check valve 860 has a configuration in which the buoyancy acted by the water level in the tank body 820 and its own weight are balanced when the entire VB side check valve 860 is immersed in water. In addition, the check valve body 862 is formed by mixing two kinds of materials, PP (polypropylene) and talc, which have different specific gravities, but the present invention is not limited to this.

For example, the check valve main body 862 adjusts the specific gravity of the check valve main body 862 by adhering, welding, fitting, etc., a plurality of parts made of materials having different specific gravities to form one part. May be good. In such a configuration, since the check valve main body 862 moves up and down depending on the water level in the water storage tank 800, it is preferable to make a plurality of parts made of materials having different specific gravities different from each other.

Further, the check valve main body 862 may be made of three or more kinds of materials having different specific gravities instead of two kinds of materials having different specific gravities.

Further, as two kinds of materials having different specific gravities constituting the check valve main body 862, for example, PP (polypropylene) and GF (glass fiber) or ABS resin may be used even if the combination of PP (polypropylene) and talc is not used. It is possible to adjust the specific gravity of the check valve main body 862 by selecting an appropriate combination of materials such as GF (glass fiber), resin and metal according to the usage environment and the like.
In the case of a combination of resin and metal, it is not so preferable to use metal from the viewpoint that the specific gravity may change due to the influence of rust over time.

In the above embodiment, it is determined that the wash water overflowing from the water stop water level WL in the tank body 820 can be released from the overflow pipe 890 to the jet spout 214 through the jet side water supply channel 380. The present invention is not limited to this, and for example, the overflow pipe 890 may be connected to the rim side water supply channel 340 instead of the jet side water supply channel 380 to escape from the rim water discharge port 212.

In the above embodiment, the buoyancy generated in the VB side check valve 860 when the water level of the washing water flowing from the throttle portion 856 and accumulated in the communication flow path 852 rises to the upper end portion 862a of the check valve main body 862. And the own weight of the VB side check valve 860 are in a balanced state, but the present invention is not limited to this, and for example, the water level of the washing water collected in the communication flow path 852 is the check valve main body 862. When the water rises further above the upper end portion 862a, the buoyancy generated in the VB side check valve 860 and the own weight of the VB side check valve 860 may be in a balanced state. That is, in the present invention, the buoyancy generated in the VB side check valve 860 and the VB side check valve when at least the water level of the washing water collected in the communication flow path 852 rises to the upper end portion 862a of the check valve main body 862. The valve 860 is in a state of being balanced with its own weight.

The elements included in each of the above-described embodiments can be combined as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

100 Flush toilet 200 Toilet bowl main body 210 Bowl part 212 Rim spout 214 Jet spout 220 Drain trap pipeline 300 Functional part 320 Water supply channel 340 Rim side water supply channel 360 Tank side water supply channel 370 Pump side water supply channel 380 Jet side water supply channel ( Water pipe, wash water supply pipe)
390 Drainage channel 600 Valve unit 620 Constant flow valve 640 Main valve 660 Water supply channel switching valve 680 Vacuum breaker 684a Rim side outlet 684b Tank side outlet 685a Rim side air inlet 685b Tank side air inlet 686 Water receiving port 686a 800 Water storage tank 820 Tank body 840 Water supply side check valve 850 Introductory part 852 Communication flow path 854 Intake port part 854a Intake port 854b Valve seat 854c Storage part 856 Squeezing part 860 VB side check valve (check valve)
862 Check valve body 864 Valve body 880 Overflow spout 890 Overflow pipe (water pipe)
892 OF side check valve 900 Pressurizing pump

Claims (3)

A toilet bowl body, a water storage tank for storing washing water supplied to the toilet bowl body, a water passage pipe connecting the toilet bowl body and the water storage tank, an intake port for sucking air into the water storage tank, and the water storage tank. It is equipped with a check valve that moves up and down depending on the water level in the tank to open and close the intake port.
The water pipe
A wash water supply pipe for supplying the wash water in the water storage tank to the toilet body at the time of washing the toilet bowl, and one end of the wash water supply pipe is opened above the water stoppage level in the water storage tank, and the wash water in the water storage tank is opened. With an overflow pipe, which allows the water to escape to the toilet body,
The check valve is
A flush toilet configured such that the buoyancy acting on the check valve according to the water level in the water storage tank and the own weight of the check valve are balanced in a state where the entire check valve is immersed in water. The check valve has a check valve body that moves up and down depending on the water level in the water storage tank, and a valve body that comes into contact with the intake port when the check valve closes the intake port. ,
The check valve is
The flush toilet according to claim 1, wherein the check valve body is made of at least two or more materials having different specific gravities to adjust the specific gravity. The flush toilet according to claim 1 or 2, wherein the intake port portion has a valve seat that comes into contact with the check valve and a storage portion for storing wash water above the valve seat.

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