JP2901449B2 - 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 relates to a flush toilet that can reduce undesired noise at the time of washing and draining, and can also reduce the return of dirt and washing water and stabilize washing performance, while saving water for washing. It is about.

[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 is, for example, shown in FIG.
Can be shown as a cross-sectional view. 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 Drain port of bowl 1, 6 is rim 2
Is a jet hole, 7 is a jet hole, 8 is a headrace, and 9 'is an inverted U-shaped drainage pipe acting as a siphon. The drain pipe 9 'is formed of a hard material such as ceramics 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 water-filled state inside the drainage line 9 ′, thereby causing a siphon action and forcibly discharging dirt in the bowl 1 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 'is full, and this suction force causes the water in the filled portion to be chained. The waste and the washing water in the bowl 1 are discharged to the inside.
In addition, when the water is not washed, a water puddle is formed in the bowl 1 with the water level at the bent portion of the inverted U-shaped drain pipe 9 'as the upper limit water level, and this water puddle prevents the backflow of offensive odor. This is the initial flow of action.

[0005] In this siphon-jet type flush toilet, an air pocket is formed in the inside of the drainage pipe which hangs downward through the bent portion of the inverted U-shaped drainage pipe 9 '. An important requirement is how quickly the pool is filled with water. 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.

[0006] Further, in the flush type flush toilet which can be exemplified in the cross-sectional view of FIG. 13 and the plan view of FIG. 14, 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, a flush hole 6 provided in the rim portion 2 is provided.
The washing water is spouted only from the washing water, and the surface of the bowl 1 is washed with the washing water from the spray hole 6, and at the same time, the dirt and the like are discharged from the bowl 1 in the direction of the drain pipe line 9 '. It is characterized by:

[0007]

However, in the case of a siphon-jet type flush toilet as shown in FIG. 12, for example, although it has a high washing performance, it uses a siphon action and therefore has a larger amount than the jet hole 7. There is a basic problem that water must be injected. In addition, the siphon action is such that the water in the bowl 1 is gradually drawn into the drain pipe 9 ′, the water level in the puddle drops, and air enters the drain pipe 9 ′ from the drain port 5, and the full state is broken. Therefore, there is also a problem that an unpleasant noise is generated when air enters through the outlet 5 at the end.
Furthermore, the water once drawn into the siphon action,
When the siphon action is terminated halfway, the bowl may return from the drain port 5 to the inside of the bowl 1 without passing over the bent portion above the drain pipe line 9 ', so that dirt and washing water may not completely flow.

In order to solve such a disadvantage, the inventors of the present invention have already proposed a flush toilet as illustrated in FIGS. 15A and 15B (Japanese Patent Laid-Open No. 4-28522).
No. 7). In this flush toilet, the drainage pipe 9 is formed of a flexible material, and the drainage pipe 9 is deformed and movable by driving devices 12 and 13. However, in the case of this flush toilet, since the drainage line 9 is made of a flexible material, the strength of the drainage line 9 deteriorates due to the repeated deformation, and the deformation control of the drainage line 9 is relatively difficult. Defects such as lack of shape stability of the pipe are inevitable.

On the other hand, in the case of the flush toilet shown in FIGS. 13 and 14, 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. The present invention has been made in view of the above circumstances, and solves the drawbacks of conventional flush toilets, saves water for washing, suppresses unpleasant noise during washing and drainage, and furthermore reduces waste. It is an object of the present invention to provide a highly reliable flush type flush toilet that can eliminate the return of flush water and stabilize flush performance.

[0010]

According to the present invention, a horizontal drain pipe is connected from the drain port at the bottom of the bowl of the flush toilet to the rear of the toilet, and the tip is branched up and down. A flush toilet characterized by comprising a valve device which can be opened and closed at the lower end opening of the drain pipe branch portion and a pipe portion having a discharge port connected to the branch portion.

[0011]

[Operation] In the flush toilet of the present invention, a horizontal drain pipe is connected from the drain port at the bottom of the bowl to the rear of the toilet, and the tip is branched up and down, and the lower end opening of the drain pipe branch is freely openable and closable. Since a simple valve device is provided and a pipe portion having a discharge port is connected to the branch portion, the valve device is closed during non-washing and drainage so that water can be collected in the flush toilet bowl. The backflow of the odor is prevented. At this time, the water level of the water pool in the bowl reaches the height of the upper end opening of the drain pipe branch. Even if more water is supplied into the bowl, the water overflows from the upper end opening and overflows, and is discharged from the discharge port to the outside of the flush toilet through the pipe connected to the branch. No water overflows from the bowl. Further, at the time of washing and draining, by opening the valve device, water 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 with an extremely small amount of water. Since the above-mentioned valve device is arranged at the back of the flush toilet, it is not seen from the bowl, and the appearance and the sense of quality are not impaired.

In the present invention, the height of the upper end opening can be changed by making the upper end opening of the pipe portion movable up and down. The water level of the puddle formed in the bowl can be appropriately changed. For example, by lowering the water level, splashing of water at the time of stool can be prevented, and by raising the water level, dirt on the bowl surface can be prevented.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a flush toilet according to the present invention. 1 and 2 are a cross-sectional view and a partially cutaway side view, respectively, showing an embodiment of a flush toilet of the present invention.

In the examples of FIGS. 1 and 2,
A rim portion 2 is provided along the entire upper edge of the bowl 1, and a water passage 3 for washing water is formed inside the rim portion 2. Further, the rim portion 2 is formed with a water injection hole 6 facing the inner surface direction of the bowl 1 and communicating with the water passage 3. Further, in this example, a horizontal drain pipe 14 extends from the drain port 5 provided at the bottom of the bowl 1 to the rear of the toilet. A valve block 15 is connected to the rear of the drain pipe 14 via a packing 16. The outer diameter of the drain pipe 14 can be tapered, as shown for example in FIG. 3, and can be strongly sealed as the valve block 15 is inserted. The valve block 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, in the valve block 15, a drainage pipe 19 is connected to the drainage pipe 14. The drainage inflow pipe 19 branches up and down at the end opposite to the drainage pipe 14, and includes an upper drainage pipe 20 and a lower drainage pipe 2.
It is divided into one. An overflow tank 22 is connected to the upper drain pipe 20 so as to cover the upper end opening. From this overflow tank 22, an overflow drain pipe 23 is connected in the direction of the lower drain pipe 21.
On the other hand, a flapper valve 2 is provided at the lower end opening of the lower drain pipe 21.
4 is installed so that opening and closing are possible. These lower drain pipes 2
A box-shaped case 25 is provided so as to enclose the flapper valve 1 and the flapper valve 24, and is connected to the overflow drain pipe 23. Further, a discharge port 26 is formed in the bottom of the case 25.

As illustrated in FIG. 2, the flapper valve 24
A valve shaft 27 is connected to a lower end of the valve shaft. This valve shaft 27
Is rotatably supported by a case 25 and is connected to a motor 30 via a link 28 and a cam 29. Further, as exemplified in FIGS. 5 <a> and <b>, the valve shaft 2
One end of 7 protrudes from the case 25 and is bent in a step shape. The link 28 is connected to the step 31. In this way, the operation of the motor 30 rotates the valve shaft 27, and the flapper valve 24 opens and closes.

Of course, the drive system for opening and closing the flapper valve 24 is not particularly limited to this example, but may be of any suitable construction. For example, in the flush toilet of the present invention having the above configuration,
As illustrated in FIGS. 5A and 5B, the flap valve 24 is closed, and the lower end opening of the lower drain pipe 21 in FIG. 1 is closed by the flap valve 24. by this,
Water can be stored in the bowl 1 up to the height of the upper end opening of the upper drain pipe 20. This pool prevents the backflow of offensive odors. In this case, even if more water is supplied into the bowl 1, the water overflows from the upper end opening of the upper drainage pipe 20 and overflows, and passes through the overflow tank 22, the overflow drainage pipe 23 and the case 25 and the discharge port 26. It is discharged to the outside of the flush toilet and does not overflow from the bowl 1.

On the other hand, at the time of washing and draining, the motor 30 is operated by an electric signal to open the flapper valve 24 as illustrated in FIGS. 6A and 6B, thereby opening the lower end of the lower drain pipe 21 of FIG. Open the part. Then, the washing water on the bowl 1 surface is discharged at a stretch together with the dirt and the like in the bowl 1.
Since the drain pipe 14 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 the rim 2
There is no need to jet the washing water vigorously. With a very small amount, the washing water can be drained from the bowl 1 together with dirt and the like in a quiet and short time. The backflow of water after the end of the siphon action in the conventional siphon type or siphon jet type flush toilet is prevented, and the uncomfortable noise caused by the formation of an air pocket is reduced.

After the washing and drainage, the motor 30 returns the flapper valve 24 to the closed state shown in FIG. FIG. 7 is a sectional view showing another example of the flush toilet of the present invention. In the example of FIG. 7, in the valve block 15, the upper drain pipe 20 illustrated in FIG.
0a and an outer cylinder 20b for guiding the same. The inner cylinder 20a slides up and down along the inner surface of the outer cylinder 20b. The inner peripheral surface of the inner cylinder 20a and the outer cylinder 20
An O-ring 32 is provided between the outer peripheral surfaces of b to prevent water leakage from the movable part. An overflow tank 22 is connected to the upper end of the inner cylinder 20a.
As illustrated in FIG. 8, two hoses 33 and 34 are extended from the overflow tank 22 and the case 25
Connected to As illustrated in FIG. 9 <a>, the hose 34 has an opening disposed near the bottom surface of the overflow tank 22, and the hose 33 projects and opens near the ceiling of the overflow tank 22. It is connected to the. Water overflowing from the upper end opening of the inner cylinder 20a in FIG.
5, and the air is supplied from the hose 33 into the overflow tank 22. By this, bowl 1
The water can be drained smoothly in conjunction with the water level inside.

As shown in FIG. 9B, on the side surface of the overflow tank 22, there is provided a movable cylinder 35 having a threaded portion on the inner periphery, and a threaded portion on the outer periphery so as to penetrate the movable cylinder 35. Is provided. The drive shaft 36 is rotatably supported from above and below by a box-shaped frame 37 as illustrated in FIG. A motor 38 is provided on the upper part of the frame 37, and the drive shaft 36 is rotated by the motor 38. By operating the motor 38, the drive shaft 36 rotates, and the movable cylinder 35 moves up and down.
The vertical movement can be operated by switching the motor 38 between normal rotation and reverse rotation. With the vertical movement of the movable cylinder 35, the inner cylinder 20a in FIG. 7 slides up and down with respect to the outer cylinder 20b together with the overflow tank 22. The height of the upper opening of the inner cylinder 20a can be changed, and the water level of the water pool in the bowl 1 can be set to a desired level. For example, as shown in FIG. 10, by lowering the height of the upper end opening of the inner cylinder 20a, the water level in the bowl 1 can be lowered, and splashing of water during stool can be prevented. . In addition, as illustrated in FIG. 11, by increasing the height of the upper end opening of the inner cylinder 20a, the water level in the bowl 1 can be increased, and the surface of the bowl 1 can be prevented from being stained.

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.

[0022]

As described above in detail, the present invention provides a flush toilet which saves water for the flush water, has low noise, and has excellent cleanability without returning dirt and flush water.

[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 partially cutaway side view of the example of FIG.

FIG. 3 is a cross-sectional view of a main part illustrating a connection part between a drain pipe and a drain pipe block in FIG. 1;

FIG. 4 is a plan view of a connecting portion in FIG. 3;

FIGS. 5A and 5B are a front view and a side view respectively illustrating a state of the valve device during non-wash drainage.

FIGS. 6A and 6B are a front view and a side view exemplifying a state of the valve device at the time of washing and draining, respectively.

FIG. 7 is a sectional view showing another example of the present invention.

FIG. 8 is an enlarged plan view, a front view, and a side view of the valve block of FIG. 7 respectively, <a>, <b>, and <c>.

9A and 9B are a longitudinal sectional view and a transverse sectional view, respectively, showing the overflow tank of FIG. 7 in an enlarged manner.

FIG. 10 is a cross-sectional view illustrating a use state of the flush toilet of FIG. 7;

FIG. 11 is a sectional view showing another state of use of the flush toilet of FIG. 7;

FIG. 12 is a sectional view of a conventional siphon-jet type flush toilet.

FIG. 13 is a cross-sectional view of a conventional flush toilet.

FIG. 14 is a plan view of the flush toilet of FIG. 13;

FIG. 15 is a cross-sectional view of a conventional siphon-jet type flush toilet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bowl 2 Rim part 3 Water passage 5 Drain port 6 Drain hole 14 Drain pipe 15 Valve block 16 Packing 17 Bolt 18 Nut 19 Drain inflow pipe 20 Upper drain pipe 20a Inner cylinder 20b Outer cylinder 21 Lower drain pipe 22 Overflow tank 23 Overflow drain Pipe 24 Flapper valve 25 Case 26 Discharge port 27 Valve shaft 28 Link 29 Cam 30, 38 Motor 31 Stepped portion 32 O-ring 33, 34 Hose 35 Movable cylinder 36 Drive shaft 37 Frame

Continuation of the front page (72) Inventor Takaya Minamiyama 1048 Odakadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (56) References JP-A-48-97348 (JP, A) JP-A-1-278633 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) E03D 11/02 E03D 11/13

Claims (2)

(57) [Claims] 1. A horizontal drain pipe is connected from the drain port at the bottom of the bowl of the flush toilet to the rear of the toilet, the tip of which is branched up and down, and a valve device that can be opened and closed at the lower end opening of the drain pipe branch section. A flush toilet, which is provided and connected to a pipe portion having a discharge port to the branch portion. 2. The flush toilet according to claim 1, wherein an upper end opening of the pipe portion is vertically movable.