JP2978029B2 - Flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet. 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 large use and small use. The present invention relates to a flush toilet capable of realizing water saving.

[0002]

2. Description of the Related Art Conventionally, various types of flush toilets having various structures and structures have been used in toilet rooms of houses and the like. For example, siphon type or siphon jet type flush toilets, and flush type flush toilets have been used. A flush toilet and the like have been known so far.

[0003] As a siphon jet type flush toilet, for example, one disclosed in Japanese Utility Model Publication No. 63-22212 is known. This toilet 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 2, 4 is a water supply port from a low tank, 5 is A drain port 6 of the bowl 1, a spray hole 6 provided in the rim portion 2, a jet hole 7, a water conduit 8, and an inverted U-shaped drain pipe 9 acting as a siphon. The drainage pipe 9 is formed of a hard material such as pottery integrally with the flush toilet.

In such a siphon-jet flush toilet, the bowl 1 surface is washed by the washing water flowing down from the spray hole 6 of the rim portion 2 at the time of washing. Also, bowl 1
The washing water flowing down from the headrace channel 8 is jetted from the jet hole 7 to the drain port 5 provided at the lowest position of the above, thereby forcibly causing the washing water that has washed the bowl 1 surface to drain. This drainage flow creates a full state inside the drainage pipe 9, thereby causing a siphon action, and the dirt in the bowl 1 is forcibly discharged together with the washing water. That is, in the siphon-jet type flush toilet, a suction pressure is generated in the filled portion by flowing a part of the water at a stretch after the drainage line 9 becomes full, and the suction force causes the water in the filled portion to be chained. The dirt and washing water in the bowl 1 are discharged. When the washing is not performed, the inverted U-shaped drainage pipe 9 is placed in the bowl 1.
A puddle with the water level at the bent portion of the upper limit water level is formed,
This puddle prevents the backflow of the foul odor, and also serves as the initial flow of the siphon action.

[0005] In this siphon-jet flush toilet, an air reservoir is formed inside the drainage pipe which hangs down through the bent portion of the inverted U-shaped drainage pipe 9, so that the air pool is formed during cleaning. It is an important requirement how quickly the water is filled. Therefore, conventionally, it has been proposed that the drainage pipe bends into a complicated shape, or that the inner diameter of the drainage pipe is partially reduced, thereby increasing the flow path resistance at that portion and making it easier to fill the area. Has been.

[0008] Further, in the flush type flush toilet which can be exemplified in the cross-sectional view of FIG. 8 and the plan view of FIG. 9, a drain pipe having substantially the same configuration and structure as the siphon-jet flush toilet is provided. However, in the case of this flush toilet, the flush water is spouted only from the spray hole 6 provided in the rim portion 2.
The surface of the bowl 1 is washed with the washing water from the container, and at the same time, the waste is discharged from the bowl 1 in the direction of the drain pipe 9 at the same moment.

[0007]

However, in the case of a siphon-jet type flush toilet as shown in FIG. 7, for example, although it has a high washing performance, it uses a siphon action to provide a larger amount of water than the jet hole 7. There is a basic problem that water must be injected. Also,
The siphon action is that the water in the bowl 1 is gradually drained 9
And the water level in the puddle drops, and the drain 5
Since the air enters the drain pipe 9 from the outlet and the full state is broken and the operation is completed, there is also a problem that an unpleasant noise is generated when air enters from the drain port 5 at the end. Further, once the water drawn into the siphon action ends in the middle of the siphon action, the water may return from the drain port 5 to the inside of the bowl 1 without passing over the bent portion above the drain pipe 9, and may cause waste or dirt. Wash water may not completely flow.

On the other hand, in the case of the flush toilet shown in FIGS. 8 and 9, since the waste is discharged only by the force of the water, the cleaning sound is loud and the waste which floats on the water is extremely difficult. There is a problem that it is difficult to discharge.
Various studies have been made so far to solve such disadvantages. For example, the inventors of the present invention have come up with a flush toilet as shown in the sectional view of FIG.

In this flush toilet, a drain pipe 10 is extended horizontally 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 connected to the drain pipe 10 in a vertical direction. A flapper valve 12 that can be opened and closed is disposed at the lower end opening of the drain pipe 11. Further, a discharge pipe section 14 having a discharge port 13 is provided so as to cover the drain pipe 11. The water overflowing from the upper end opening of the drain pipe 11 is discharged through the discharge pipe 13 through the discharge port 13.
From the toilet. In such a flush toilet, when flushing and draining, the flapper valve 12 is opened, and the flush water on the bowl 1 surface is discharged at once with the dirt and the like in the bowl 1. In this way, it is possible to reliably discharge dirt and the like without causing a siphon action, thereby stabilizing the cleaning performance, and at the same time, providing an effect of suppressing unpleasant noise during cleaning and drainage.

[0010] Even in the flush toilet having such excellent operational effects, in the flush toilet illustrated in FIG.
Since the bowl 1 is cleaned and drained using a certain amount of washing water regardless of whether it is large or small, always plenty of water is taken into the bowl 1 in consideration of the transport of dirt and the like during large use. I need to keep it. However, in actual use, the amount of washing water for small use is smaller than that for large use, so that the washing water for small use wastes. In order to solve this problem, it is conceivable to extend the length of the drain pipe 11 at the time of large use upward from that at the time of small use to increase the amount of water stored in the bowl 1. However, there is a problem that a special device or mechanism is required, which not only complicates the structure of the flush toilet but also makes it impossible to reduce the size.

[0011] The present invention has been made in view of the above circumstances, eliminates the drawbacks of the conventional flush toilet, suppresses unpleasant noise at the time of washing and drainage, eliminates return of dirt and washing water, Aiming to provide a highly reliable flushing toilet that can stabilize the cleaning performance and switch the amount of cleaning water between large use and small use to save water. I have.

[0012]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by connecting a drain pipe section from the drain port at the bottom of the bowl to the back of the toilet bowl, and disposing a valve device which can be opened and closed at the end opening. A drain pipe section having a discharge port is connected to the drain pipe section, and a terminal end of the drain pipe section is closed with a valve device to form a water reservoir in the bowl, and the valve device is opened. bowl in the cleaning and rinsing toilet performing drainage overflow drain pipe extending into direction or have followed the lower side to the upper side is connected to the discharge pipe part and the drainage pipe section by,
At the time of large use, the washing water supplied to the advance in the bowl
More water climbs its overflow drain,
A flush toilet characterized by the fact that the water level in the bowl rises to the height of the water and the amount of water for large use is increased compared to that for small use.

[0013]

In the flush toilet of the present invention, a drain pipe is connected from the drain port at the bottom of the bowl to the rear of the toilet, and a valve device that can be opened and closed is disposed at the terminal end thereof, and a drain port having a discharge port is provided. Since the pipe section is connected to the drain pipe section, the water can be collected in the bowl by closing the valve device during non-wash drainage. The backflow of the odor is prevented. on the other hand,
At the time of washing and draining, by opening the valve device, drainage in the bowl together with dirt and the like can be discharged by its own head pressure. There is no need to generate a siphon action for drainage, and it is not necessary to jet flushing water from the rim or the like. Discharge of dirt and the like in the bowl and cleaning of the bowl surface can be performed quietly and in a short time. Water saving can be achieved.

[0014] In flush toilet bowl of the invention, an overflow drain tube extending into direction or have then below to above is connected to the discharge pipe part and <br/> drain pipe section. During large use, wash water is supplied in advance within the bowl, along with this
Water climbs the overflow drain. The water level in the bowl
It rises to the height of the water at this time, whereby the amount of water at the time of large use can be increased more than at the time of small use. It is possible to switch the amount of washing water between large use and small use. With discharge of waste, such as in the bowl with sufficient amount of water even when a large use Ru can be cleaned of the bowl surface. Amount of water in the wash water is less seen already at the time of urination, more water-saving can be achieved. When a predetermined amount or more of washing water is supplied into the bowl, excess water can be discharged to the outside of the toilet through the discharge pipe via the overflow drain pipe. It does not overflow from the bowl.

Further, since the valve device provided in the drain pipe portion is disposed behind the flush toilet, it is not seen from the bowl, and the appearance and luxury of the flush toilet can be stably maintained.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a flush toilet according to the present invention. FIG. 1 is a sectional view and a partially cutaway side view showing an embodiment of a flush toilet of the present invention.

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

As illustrated in FIG. 1, a flapper valve 12 that can be opened and closed is installed at the end opening of the drain 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 for opening and closing the flapper valve.

In this embodiment, a cam 20 driven by a motor 19 is provided, and the rotation of the cam 20 rotates the shaft 21 to open and close the flapper valve 12 connected to the shaft 21 via the pressing plate 22. ing. Note that FIG.
5 and the state shown in FIG.
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 as to more securely close the drain pipe terminal opening by the flapper valve 12. That is, as illustrated in the side view of FIG. 6 when the flapper valve 12 is opened, at this time, the shaft 2
1 is lifted, and the elastic body 23 is extended. Motor 1
As the cam 20 rotates by 9, the elastic body 23 is restored to its original length, 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 manually opened and closed.

Of course, the drive system for opening and closing the flapper valve 12 is not particularly limited to this example, but may be of an appropriate configuration. As illustrated in FIG. 1, an overflow drain pipe 2 is provided at the end of the drain pipe 10.
5 is also connected. This overflow drain pipe 25
Extends upward from the end of the drain pipe 10, then bends and extends downward, and is connected to the case 15. That is,
The drain pipe 10 and the case 15 are communicated by the overflow drain pipe 25. In addition, an electromagnetic valve 26 is provided at the rear upper part of the flush toilet, which opens and closes in response to an electric signal from the control device, and supplies water necessary for discharging waste, cleaning the bowl, and securing the water seal to the rim portion 2. I am trying to supply.

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

On the other hand, when washing and draining at the time of small use, FIG.
As shown in the example, the motor 19 is operated by the electric signal from the control device, and the flapper valve 12 is driven to open. Then, at the same time as opening the terminal opening of the drain pipe 10 in FIG. 1, the electromagnetic valve 26 is opened, and cleaning water is supplied to the rim 2,
The water is allowed to flow out of the spray hole 6 into the bowl 1. The dirt and the like in the bowl 1 are discharged out of the toilet through the discharge port 13 at once with the washing water on the bowl 1 surface. Since the drain pipe 10 extending from the drain port 5 of the bowl 1 is disposed horizontally, the water in the bowl 1 is discharged by its own head pressure. For this reason, it is not necessary to cause a siphon action for discharging dirt and the like, and it is not necessary to jet flush water from the water spray hole 6 of the rim portion 2 vigorously. With a small amount of water, the washing water can be drained from the bowl 1 together with dirt and the like in a quiet and short time. In the conventional siphon type or siphon jet type flush toilet, backflow of dirt and water after the end of the siphon action is prevented, and unpleasant noise caused by the formation of an air pocket is reduced.

After washing and draining, the motor 19 causes the flapper valve 12 to return to the closed state shown in FIGS. Thereafter, a predetermined amount of washing water is further supplied to the rim portion 2 and flows out of the spray hole 6 into the bowl 1 so that the water level l
Up to a puddle. When the supply of the predetermined amount of water is completed, the solenoid valve 26 closes. The operation of the solenoid valve 26 can be automatically controlled by the control device.

When cleaning and draining the water, the solenoid valve 26 is first opened, and the cleaning water is supplied into the bowl 1 through the water spray hole 6 of the rim 2. Its feed rate that-out <br/> with be an amount sufficient to discharge and carry the dirt or the like in the bowl 1. With the supply of the washing water, water is discharged from the drain pipe 10.
The overflow drain pipe 25 that goes upward from the end of
Climbing, water level in the bowl 1 is increased to h. After a Tokoro Determination of water (water level h), as well as the cleaning water discharge during urination, as illustrated in FIG. 6, the motor 19 by an electric signal
Operates, the flapper valve 12 opens, and the terminal opening of the drain pipe 10 is opened. Then, the cleaning water on the surface of the bowl 1 is discharged from the toilet 13 to the outside of the toilet bowl at a stretch together with the dirt and the like in the bowl 1. In this way, the amount of water at the time of large use, because that you increase to a sufficient amount of water to the emissions cleaning than the amount of water at the time of urination,
Reliably conveyed discharge of waste, such as, moreover can be carried out effectively. In the same manner as when urination, back flow of dirt, etc. does not occur. Cleaning performance of flush toilet is stabilized, also reduces noise.

The water level in the bowl 1 never rises above the highest point of the overflow drain pipe 25. As described above, the overflow drain pipe 25 is connected to the case 15.
, The excess water is sent to the case 15,
It is discharged out of the toilet through the discharge port 13. After the washing and drainage, the flapper valve 12 is closed by the motor 19. The cleaning water continues to be supplied from the water spray hole 6 of the rim portion 2 as it is. When a predetermined amount of water is supplied to the water level l, the electromagnetic valve 26 closes, and the supply of the cleaning water into the bowl 1 ends. .

Further, in the flush toilet of the present invention, as illustrated in FIG. 1, the height at the back of the toilet can be substantially the same as the height of the toilet lid 27 at the front of the toilet . That the flapper valve 12 enters to see grated Shi field of view when I opened the toilet lid 27
Because no appearance and luxury as flush toilet is stably maintained. Of course, the present invention is not limited by the above examples. It goes without saying that various details are possible as long as the flush toilet is of a type that discharges dirt and the like using a drainage pipe.

[0027]

As described above in detail, according to the present invention, the amount of water can be switched between large use and 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 and washing water and the like is prevented, and the washability of the flush toilet is improved. Moreover, the appearance and luxury of the flush toilet become good.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a main part illustrating a connection part between a drain pipe and a case in FIG. 1;

FIG. 3 is a plan view of a connecting portion in FIG. 2;

FIG. 4 is a side view illustrating a mechanism for opening and closing the flapper valve;

FIG. 5 is a plan view of FIG. 4;

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

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

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

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

FIG. 10 is a sectional view of a flush toilet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bowl 2 Rim part 3 Water passage 5 Drain port 6 Drain hole 10 Drain pipe 12 Flapper valve 13 Drain 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 drain Pipe 26 Solenoid valve 27 Toilet lid

Continuation of the front page (72) Inventor Masashi Ishida 1048 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Works, Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) E03D 11/13

Claims (3)

(57) [Claims] A drain pipe is connected to the toilet from the bottom of the bowl to the back of the toilet, and a valve device that can be opened and closed is provided at an end opening of the bowl. The drain pipe having a discharge port is connected to the drain pipe. In a flush toilet that performs bowl washing and drainage by closing the terminal opening of the drain pipe section with a valve device to form a water reservoir in the bowl and opening the valve device to wash and drain the bowl, to and connects the discharge pipe section overflow drain pipe the drainage tube portion extending, at the time of large-use, water by washing water supplied in advance the bowl
But climbed the overflow drain,
A flush toilet characterized by the fact that the water level in the bowl has risen so that the amount of water for large use is larger than that for small use. 2. A flush toilet bowl according to claim 1 wherein formed by providing a valve device at the end opening of the drain pipe section in its elevation direction. 3. A formed by the height of the toilet rear portion at substantially the same height and the toilet lid according to claim 1 or 2 flush toilet bowl according.