JPH06306921A - Flush toilet - Google Patents

Abstract

PURPOSE:To depress unpleasent noises on flushing, hinder excrements and flushing water from returning to the stool, stabilize the flushing. function and further, spare flushing water by changing over the flushing water volume corresponding to feces and urine. CONSTITUTION:A drain pipe 10 is connected from the drain opening 5 of bowl 1 bottom to the rear side or bowl and a freely opening valve device 12 is arranged at the opening of the end thereof. A discharge piping part 15 provided with a discharge opening 13 is connected to the drain pipe 10. Water pool in the bowl 1 is formed by closing the terminal opening or the drain pipe 10 by the valve device 12 and the washing and draining of the bowl 1 is done by opening the valve device 12. In this flush toilet, the drain pipe 10 and the discharge piping part 15 are connected to each other by an overflow drain pipe 25 which extends upward and subsequently downward. When used for feces, water in the bowl is increased by passing flush water in the drain pipe 25 in advance than that for urine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet bowl. More specifically, the present invention suppresses unpleasant noise during cleaning drainage, eliminates the return of dirt and cleaning water, stabilizes cleaning performance, and switches the amount of cleaning water between heavy use and small use. The present invention relates to a flush toilet that can also realize water saving.

[0002]

2. Description of the Related Art Conventionally, various flush toilets having various configurations and structures have been used in a toilet room of a house or the like. For example, siphon-type or siphon-jet flush toilets and wash-out type flush toilets have been used. Flush toilets have been known so far.

As a siphon jet type flush toilet, for example, one disclosed in Japanese Utility Model Publication No. 63-22212 is known. This toilet bowl can be shown, for example, as a cross-sectional view in FIG. In the figure, 1 is a bowl of a toilet bowl, 2 is a rim portion provided along the entire upper edge of the bowl 1, 3 is a water passage provided in the rim portion 4, 4 is a water inlet from a low tank, and 5 is The drainage port of the bowl 1, 6 is a water spray hole provided in the rim portion, 7 is a jet hole, 8 is a water conduit, and 9 is an inverted U-shaped drainage pipe line that acts as a siphon. The drainage pipe 9 is integrally formed with a flush toilet bowl by a hard material such as pottery.

In such a siphon jet type flush toilet, the surface of the bowl 1 is washed with the washing water flowing down from the water spray hole 6 of the rim portion 2 at the time of washing. Also, bowl 1
The washing water flowing down from the water conduit 8 is ejected from the jet hole 7 to the drainage port 5 provided at the lowest position of the above, and a forced drainage flow is caused to the washing water that has washed the surface of the bowl 1. This drainage flow creates a full state inside the drainage pipe 9, and as a result, a siphon action occurs and the waste in the bowl 1 is forcibly discharged together with the wash water. That is, in the siphon jet type flush toilet, a suction pressure is generated in the full water portion by flowing a portion of the water at once after the drainage pipe 9 becomes full, and this suction force causes a chain connection with the water in the full water portion. The dirt and cleaning water in the bowl 1 are discharged. In addition, when not cleaning, an inverted U-shaped drain pipe 9 is provided in the bowl 1.
A water pool with the water level at the bend of the upper limit water level is formed,
This puddle prevents the backflow of bad odors and is the initial flow of siphon action.

In this siphon jet type flush toilet, since an air pool is formed inside the drainage line which hangs downward through the bent portion of the inverted U-shaped drainage line 9, the air pool is washed during cleaning. It is an important requirement how quickly the water is filled. Therefore, in the past, it has been proposed to increase the flow resistance of the drainage pipeline by bending the drainage pipeline into a complicated shape or to partially reduce the inner diameter of the drainage pipeline to make it easier to create a full state. It has been done.

Further, in the flush toilet of the flushing type, which can be illustrated in the cross-sectional view of FIG. 8 and the plan view of FIG. 9, a drain pipe having a structure and a structure similar to those of the siphon jet flush toilet is provided. However, in the case of this flush-type flush toilet, the flush water is ejected only from the water spray hole 6 provided in the rim portion 2.
It is characterized in that the surface of the bowl 1 is washed with the washing water from the above, and at the same time, dirt and the like is discharged from the bowl 1 in the direction of the drain pipe 9 at the same time.

[0007]

However, for example, in the case of a siphon jet type flush toilet as shown in FIG. 7, although it has a high cleaning performance, the siphon action is utilized, so that a larger amount than the jet hole 7 is used. There is the basic problem of having to spray water. Also,
The siphon action is that the water in the bowl 1 gradually drains
The water level in the puddle, and the drain port 5
There is also a problem that an unpleasant sound is generated when the air enters from the drainage port 5 at the end because the air enters into the drainage pipe line 9 and the full state is broken and completed. Furthermore, once the water that has been drawn into the siphon action ends in the middle of the siphon action, it may return to the inside of the bowl 1 from the drainage port 5 without going over the bent portion above the drainage pipe line 9, which may lead to dirt and The washing water may not completely flow.

On the other hand, in the case of the flushing type flush toilet shown in FIGS. 8 and 9, since the waste is discharged only by the force of the water, the flushing noise is loud and the waste that floats on the water is extremely problematic. There was a problem that it was difficult to discharge it.
In order to eliminate such drawbacks, various studies have been made so far, and for example, the inventors of the present invention have devised a flush toilet as shown in the sectional view of FIG.

In this flush toilet, a drain pipe 10 is horizontally extended from the drain port 5 provided at the bottom of the bowl 1 to the rear of the toilet, and another drain pipe 11 is vertically connected to the drain pipe 10. A flapper valve 12 that can be opened and closed is arranged at the lower end opening of the drainage pipe 11. Further, a drain pipe section 14 having a drain port 13 is provided so as to cover the drain pipe 11. Water overflowing from the upper end opening of the drainage pipe 11 is discharged through the discharge pipe portion 14 to the discharge port 13
To the outside of the toilet bowl. In such a flush toilet, the flapper valve 12 is opened at the time of cleaning and draining, and the cleaning water on the surface of the bowl 1 is discharged all at once, along with the dirt and the like in the bowl 1. In this way, it becomes possible to reliably discharge dirt and the like without causing a siphon action, the cleaning performance is stabilized, and unpleasant noise during cleaning drainage is suppressed.

Even in the flush toilet having such an excellent function and effect, in the flush toilet illustrated in FIG.
Since the surface of the bowl 1 is washed and drained using a certain amount of wash water regardless of whether it is for big use or small use, a large amount of water should always be stored in the bowl 1 in consideration of the transportation of dirt and the like during heavy use. It is necessary to store it. However, in reality, the amount of cleaning water for small use is smaller than that for large use, so that the cleaning water for small use is wasted. In order to eliminate this, it may be considered that the length of the drainage pipe 11 at the time of heavy use is extended to a position higher than that at the time of light use to increase the amount of water accumulated in the bowl 1, but in that case Requires a special device or mechanism, which not only complicates the structure of the flush toilet, but also causes a problem that it cannot be made compact.

The present invention has been made in view of the above circumstances, and solves the drawbacks of the conventional flush toilet bowl, suppresses unpleasant noise during flush drainage, and eliminates the return of dirt and flush water. With the aim of providing a highly reliable flush toilet with a stable flushing performance, which can also save water by switching the amount of flush water between heavy use and small use. There is.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention connects a drainage pipe portion to a toilet rear side from a drainage port at the bottom of a bowl, and installs a valve device which can be opened and closed at its end opening. A drainage pipe part having a drainage port is connected to the drainage pipe part, and the terminal opening of the drainage pipe part is closed by a valve device to form a water pool in the bowl and open the valve device. In a flush toilet for cleaning and draining the bowl, the drainage pipe section and the discharge pipe section are connected by an overflow drainage pipe that extends upward and then downwards. Provided is a flush toilet which is characterized in that the amount of water is increased as compared with the time of small use.

[0013]

[Operation] In the flush toilet of the present invention, a drain pipe is connected from the drain at the bottom of the bowl to the rear of the toilet, and a valve device that can be opened and closed is provided at the end opening of the flush. Since the pipe part is connected to the drain pipe part, water can be stored in the bowl by closing the valve device during non-cleaning drainage. Backflow of malodor is prevented. on the other hand,
At the time of cleaning drainage, by opening the valve device, the drainage in the bowl can be drained by its own head pressure together with dirt and the like. It is not necessary to cause a siphon action for draining water, and it is not necessary to vigorously spray cleaning water from the rim portion or the like. It is possible to quietly and in a short period of time, drain dirt and the like from the bowl and clean the bowl surface. Water saving can be achieved.

Further, in the present invention, since the drainage pipe portion and the discharge pipe portion are connected by the overflow drainage pipe extending upward and then downwardly, the drainage pipe portion is preliminarily supplied with cleaning water during the heavy use, and the drainage pipe portion The amount of water can be increased more than when using a small amount. The amount of wash water can be switched between heavy use and small use. Even in heavy use, the amount of water in the bowl can be discharged and the bowl surface can be washed with a sufficient amount of water, and the amount of wash water can be small when in small use. Further water saving can be achieved. When a predetermined amount or more of cleaning water is supplied into the bowl, excess water can be discharged to the outside of the toilet via the overflow drain pipe and the drain pipe portion. It doesn't overflow the bowl.

Further, since the valve device provided in the drain pipe portion is arranged at the rear of the flush toilet bowl, it is not visible from the bowl, and the appearance and high-class feeling of the flush toilet bowl are stably maintained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The flush toilet bowl according to the present invention will be described in more detail below with reference to the accompanying drawings. FIG. 1 is a sectional view and a partially cutaway side view showing an embodiment of the flush toilet of the present invention.

In the example of FIG. 1, a rim portion 2 is provided on the entire circumference along the upper edge of the bowl 1, and a wash water passage 3 is formed inside the rim portion 2. . Further, the rim portion 2 faces the inner surface of the bowl 1 and has a water passage 3
A water spray hole 6 for communicating with the washing water is formed. Further, in this example, a horizontal drain pipe 10 is extended from the drain port 5 provided at the bottom of the bowl 1 to the rear of the toilet bowl. Behind the drain pipe 10, a case 15 having a discharge port 13 at the bottom is provided.
Are connected via packing 16. The outer diameter of the drainage pipe 10 can be tapered, for example, as shown in FIG. 2, and can be strongly sealed as the case 15 is inserted. As illustrated in FIG. 3, the case 15 can be firmly fixed in the flush toilet with bolts 17, nuts 18 and the like.

As shown in FIG. 1, a flapper valve 12 that can be opened and closed is installed at the end opening of the drainage pipe 10 in the vertical direction of the opening. This flapper valve 12
It opens and closes inside the case 15. 4 and 5 are a side view and a plan view, respectively, illustrating a mechanism portion that opens and closes the flapper valve.

In this example, a cam 20 driven by a motor 19 is provided, and the shaft 21 is rotated by the rotation of the cam 20 to open and close the flapper valve 12 connected to the shaft 21 via a pressing plate 22. ing. In addition, this FIG.
And in the state shown in FIG. 5, the flapper valve 12
Closes the drain pipe 10. Further, in this example, an elastic body 23 such as a spring having a fixed end is connected to the shaft 21 so that the flapper valve 12 closes the drain pipe terminal opening more securely. That is, as illustrated when the flapper valve 12 is opened in the side view of FIG.
1 is lifted and the elastic body 23 is stretched. Motor 1
The elastic body 23 is restored to its original length as the cam 20 is rotated by 9, and the restoring force released at this time makes the closing of the drain pipe 10 by the flapper valve 12 stronger. Further, in this example, a manual link 24 is also provided so that the flapper valve 12 can be opened and closed manually.

Of course, the opening / closing drive system of the flapper valve 12 is not particularly limited to this example, and an appropriate configuration can be adopted. Further, as illustrated in FIG. 1, the overflow drain pipe 2 is provided at the end of the drain pipe 10.
5 is also connected. This overflow drain 25
Is connected to the case 15 from the terminal end of the drainage pipe 10 upward, then bent and extended downward. That is,
The drain pipe 10 and the case 15 are communicated with each other by the overflow drain pipe 25. Further, an electromagnetic valve 26 is provided at the upper rear part of the flush toilet, which opens and closes in response to an electric signal from the control device to discharge water necessary for discharging waste, cleaning the bowl and securing a water seal to the rim portion 2. I am trying to supply it.

For example, in the flush toilet of the present invention having the above-described structure, when the flush toilet is not flushed, the flush toilet bowl shown in FIGS.
As illustrated in FIG. 1, the flapper valve 12 is closed, and
The end opening of the drainage pipe 10 is closed by this flapper valve 12. In this state, water is supplied into the bowl 1 and a water pool is formed up to the water level 1. This pool of water prevents the backflow of malodor.

On the other hand, when cleaning and draining water during small use, see FIG.
The motor 19 is operated by the electric signal from the control device to drive the flapper valve 12 to open, as illustrated in FIG. Then, at the same time as opening the terminal opening of the drainage pipe 10 in FIG. 1, the electromagnetic valve 26 is opened, and cleaning water is supplied to the rim portion 2.
It is made to flow out into the bowl 1 from the water spray hole 6. Dirt and the like in the bowl 1 is discharged from the toilet bowl all at once through the outlet 13 together with the cleaning water on the surface of the bowl 1. Since the drain pipe 10 extending from the drain port 5 of the bowl 1 is arranged horizontally, the water in the bowl 1 is drained by its own head pressure. Therefore, it is not necessary to cause a siphon action for discharging dirt and the like, and it is not necessary to vigorously inject the cleaning water from the water spray hole 6 of the rim portion 2. It becomes possible to drain the wash water from the bowl 1 together with dirt and the like with a small amount of water, quietly, and in a short time. In the conventional siphon type or siphon jet type flush toilet, backflow of dirt and water after the siphon action is prevented, and unpleasant noise due to air pocket formation is reduced.

After washing and draining, the flapper valve 12 is returned to the closed state shown in FIGS. 4 and 5 by the motor 19. After that, a predetermined amount of cleaning water is further supplied to the rim portion 2 and is made to flow out into the bowl 1 through the water spray hole 6 to cause the water level l in the bowl 1.
Form a puddle up to. When a predetermined amount of water has been supplied, the solenoid valve 26 closes. The operation of the solenoid valve 26 can be automatically controlled by the control device.

When cleaning and draining water during heavy use, first, the electromagnetic valve 26 is opened, and cleaning water is supplied into the bowl 1 through the water spray holes 6 of the rim portion 2. The supply amount thereof can be set to an amount sufficient to discharge and convey the dirt and the like in the bowl 1, and the water level in the bowl 1 rises to h. This bowl 1
The rise of the water level inside the overflow drain pipe 25
Is brought about by. That is, since the overflow drain pipe 25 is directed upward from the terminal end portion of the drain pipe 10, the wash water is supplied from the water spray hole 6 of the rim portion 2 to the overflow drain pipe 25, and the bowl 1 The water level inside can be raised. After reaching the predetermined amount of water (water level h), the motor 19 is activated by an electric signal to open the flapper valve 12 and the drain pipe 10 as shown in FIG. The end opening of is opened. Then, the cleaning water on the surface of the bowl 1 is expelled from the discharge port 13 out of the toilet together with the dirt and the like in the bowl 1. In this way, during heavy use, the amount of water required for discharging and cleaning the water can be increased more than the amount of water during small use, so that waste and the like can be discharged and transported reliably and effectively. As in the case of small use, backflow of filth does not occur. The flushing performance of the flush toilet is stabilized. Also, noise is reduced.

The water level in the bowl 1 does not rise above the highest point of the overflow drain pipe 25. As described above, the overflow drain pipe 25 is installed in the case 15
The excess water is sent to the case 15 because it is connected to
It is discharged to the outside of the toilet via the discharge port 13. After washing and draining, the flapper valve 12 is closed by the motor 19. The washing water continues to be supplied from the water spray hole 6 of the rim portion 2 as it is, but when a predetermined amount up to the water level 1 is supplied, the solenoid valve 26 is closed and the supply of the washing water into the bowl 1 is completed. .

Further, in the flush toilet of the present invention, as illustrated in FIG. 1, the height behind the toilet bowl can be made substantially the same as the height of the toilet lid 27 in front of the toilet bowl. At the same time, the flapper valve 12 does not have to be placed in the gaze field when the toilet lid 27 is opened, so that the appearance and high-class feeling of the flush toilet can be stably maintained. Of course, the present invention is not limited to the above examples. It goes without saying that various aspects can be applied to the details as long as the flush toilet is of a type that discharges dirt and the like using a drainage pipe.

[0027]

As described in detail above, according to the present invention, it is possible to switch the amount of water during heavy use and during small use.
Further water saving is achieved, and at the same time, noise at the time of washing and draining can be suppressed, return of dirt, washing water, etc. is prevented, and the washability of the flush toilet is improved. Moreover, the flush toilet bowl has a good appearance and a high-class appearance.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a flush toilet of the present invention.

FIG. 2 is a cross-sectional view of a main part illustrating a connection part between the drainage pipe and the case of FIG.

FIG. 3 is a plan view of the connection portion of FIG.

FIG. 4 is a side view illustrating an example of a mechanism unit that opens and closes a flapper valve.

FIG. 5 is a plan view of FIG.

FIG. 6 is a side view showing a mechanical portion when the flapper valve is opened.

FIG. 7 is a cross-sectional view of a conventional siphon jet flush toilet bowl.

FIG. 8 is a cross-sectional view of a conventional flush-type flush toilet bowl.

9 is a plan view of the flush toilet of FIG. 8. FIG.

FIG. 10 is a cross-sectional view of a flush toilet bowl.

[Explanation of symbols]

 1 bowl 2 rim part 3 water passage 5 drainage port 6 water injection hole 10 drainage pipe 12 flapper valve 13 discharge port 15 case 16 packing 17 bolt 18 nut 19 motor 20 cam 21 shaft 22 pressing plate 23 elastic body 24 manual link 25 overflow drainage Pipe 26 Solenoid valve 27 Toilet lid

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashi Ishida 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (3)

[Claims] 1. A drain pipe part is connected from a drain port at the bottom of a bowl to the rear of the toilet, and a valve device that can be opened and closed is provided at the end opening part thereof, and a discharge pipe part having a discharge port is provided at the drain pipe part. In the flush toilet bowl that is used for flushing and draining the bowl by opening the valve device, a water pool is formed in the bowl by closing the end opening of the drainage pipe part with the valve device. The flush toilet bowl is characterized in that the drain pipe portion and the discharge pipe portion are connected by an overflow drain pipe extending to the above . 2. The flush toilet according to claim 1, wherein a valve device is provided at a terminal opening of the drainage pipe portion in a vertical direction thereof. 3. The flush toilet according to claim 1, wherein the height of the rear part of the toilet is substantially the same as the height of the toilet lid.