JP2002167834A - Flush toilet stool preventing water seal surface from lowering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the height of a water seal surface of a flush toilet stool at the time of flushing in a simple structure. SOLUTION: The flush toilet stool preventing the water seal surface from lowering is constituted that an upper space 5a of a low tank 5 and a drain pipe 4 are connected to each other through an air passage 6, a vent valve 7 is provided in the air passage 6, the vent valve 7 is constituted of a valve body 10 and a valve seat 9 facing the air passage 6, and a valve opening position P, in which the valve body 10 is separated from the valve seat 9 by a negative pressure of the inside of the drain pipe 4 to the outside air, and a valve closing position Q, in which the valve body 10 is sat on the valve seat 9 by receiving a normal pressure of the inside of the drain pipe 4 to the outside air, are constituted to be switchable. At the time of draining, if the inside of the drain pipe 4 is brought into the negative pressure, since the vent valve 7, to which the negative pressure reaches through the air passage 6, is opened and the outside air is flowed into the drain pipe 4 through the air passage 6 from the side of the low tank 5, the height of the water seal surface of a toilet stool main body 1 is stabilized and the leaking of noises on the periphery of the drain pipe and an offensive odor in the drain pipe are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet for preventing a water-sealing surface from lowering. The flush toilet has a simple structure.
(Hereinafter referred to as noise) and a device capable of effectively preventing odor from leaking into the toilet.

[0002]

2. Description of the Related Art In a flush toilet, generally, a toilet body is connected to a drain pipe via a trap portion, and water flowing from a low tank is stored from a lower portion of the toilet body to a trap portion to store the upper space of the toilet body. Is shut off from the inside of the drain pipe to prevent the odor in the drain pipe from leaking to the toilet.

[0003] Basically, in an apartment house, the drain pipes of individual toilet bowls are collectively connected to a common drainage pipe, and even in an individual house, the drain pipes of toilet bowls are located in other places of the toilet bowl. Alternatively, it is also connected to a drainage pipe together with a faucet drainage pipe.
In such a case, if the drainage is performed at another location, the drainage pipes of the toilets that communicate with each other due to the water flow are inclined to a negative pressure with respect to the outside air, so that the water level of the stored water of the flush toilet, that is, the sealing surface, When the air descends and the air flows into the drain pipe, it generates noise, such as gurgling, and on the contrary, the odor in the drain pipe leaks to the toilet body.

For example, Japanese Utility Model Laid-Open No. 6-87483 discloses
(See FIG. 8), a deodorizing fan 107 and an intake duct 106 are provided in a low tank 105 of the flush toilet, and the low tank 105 is provided.
An exhaust hose 108 is supported outside, and a small exhaust chamber 109 is protrudingly provided behind the trap portion 103 so that the inner space of the toilet body 101 can be divided into a water passage 102, an overflow pipe 111 in a low tank 105, an intake duct 106, and a deodorizing fan. 10
7. The deodorizing fan 1 is communicated with the drain pipe 104 through the exhaust hose 108 and the exhaust small chamber 109 in order.
There is disclosed a deodorizing flush toilet in which the odor remaining in the toilet body 101 with the ventilation power of 07 is guided from the overflow pipe 111 and the exhaust hose 108 to the drain pipe 104 to be forcibly eliminated.

[0005]

In the prior art, the odor in the toilet body 101 is removed by a deodorizing fan 107 to the drain pipe 1.
04, for the purpose of stabilizing the height of the water sealing surface in the toilet or preventing the odor in the drain pipe from flowing back into the toilet and leaking Not something.

According to the present invention, the height of the sealing surface of the flush toilet is stabilized even during cleaning by a simple structure, and the noise of air generated around the drainpipe or the odor in the drainpipe into the toilet bowl. The technical task is to prevent the leakage of water.

[0007]

SUMMARY OF THE INVENTION The present inventor has proposed a simple means that does not require the deodorizing fan or the like, and appropriately compensates for a decrease in the internal pressure of the drainage pipe to antagonize the external pressure, so that the inside of the flush toilet is reduced. The present invention was completed by preventing the lowering of the water sealing surface and preventing leakage of odor in the drainage pipe even by supplementing the internal pressure.

That is, the present invention 1 relates to a flush toilet in which the low tank 5 is disposed above the rear surface of the toilet body 1 and the drain pipe 4 is led out from the toilet body 1 through the trap portion 3 bent vertically. 5, the upper space 5a and the drain pipe 4 communicate with each other through a ventilation path 6, and a ventilation valve 7 is provided in the ventilation path 6. The ventilation valve 7 includes a valve body 10 and a valve seat 9 facing the ventilation path 6, A valve opening position P at which the valve body 10 separates from the valve seat 9 due to a negative pressure in the drain pipe 4 against the outside air, and a valve closing position at which the valve body 10 is seated on the valve seat 9 under the positive pressure inside the drain pipe 4 against the outside air. The opening 6a facing the upper space 5a of the low tank 5 of the ventilation path 6 or the valve port 8 of the ventilation valve 7 is opened higher than the inlet 11a of the overflow pipe 11 of the low tank 5. Water sealing surface lowering prevention type It is a flush toilet bowl.

According to a second aspect of the present invention, in the first aspect of the present invention, a storage chamber 12 is provided in a vertical direction near one side in the low tank 5,
A communication port 13 is provided in the drain pipe 4, a ventilation valve 7 is provided in an upper part of the storage chamber 12, and a connection port 13 of the drain pipe 4 and the ventilation valve 7 face the storage chamber 12. It is a flush toilet of a water sealing surface lowering prevention type, characterized by being connected by:

According to a third aspect of the present invention, the air passage 6 according to the first aspect of the present invention comprises:
This is a flush toilet of a water sealing surface lowering prevention type, which is a flexible ventilation pipe facing the outside of the low tank 5.

[0011]

The principle of operation of the flush toilet of the present invention will be described with reference to FIG. 2 and FIG. 5 or FIG. Washing the toilet bowl, or
When the inside of the drain pipe 4 of the flush toilet becomes a negative pressure with respect to the outside air due to the drainage operation of the toilet and hand washing of other places, the outside water loaded on the storage water of the toilet body 1 causes the storage water to be stored at atmospheric pressure. Although the water sealing surface 2 is going to descend, in this negative pressure state, the negative pressure of the drain pipe 4 is transmitted to the ventilation valve 7 through the ventilation path 6,
Since the valve body 10 of the ventilation valve 7 is displaced to the valve opening position P, outside air flows into the drain pipe 4 from the upper space 5a of the low tank 5 through the ventilation valve 7 and the ventilation path 6, and the inside of the drain pipe 4 It has the same pressure as the upper space 5a of the low tank 5, that is, equals to the atmospheric pressure. As a result, the drain water 4
Since the pressure acting to push from the inside of the container antagonizes the external pressure applied to the water sealing surface 2 from above, the water sealing surface 2 of the stored water can be prevented from lowering, and the height of the water sealing surface 2 is thus reduced. Stabilize.

On the other hand, when the inside of the drain pipe 4 is at a positive pressure with respect to the outside air, the positive pressure of the drain pipe 4 is transmitted to the ventilation valve 7 through the ventilation path 6, and the valve body 10 of the ventilation valve 7 is closed. Since it is displaced to the valve position Q, the odor in the drain pipe 4 does not flow backward through the ventilation path 6 to the upper space 5a of the raw tank 5 and leak. In this case, since the valve port 8 of the ventilation valve 7 is opened above the inlet 10 a of the overflow pipe 10 of the low tank 5, the valve port 8 is always positioned higher than the maximum water level of the washing water stored in the low tank 5. The vent valve 7 always functions effectively without being blocked by the accumulated washing water. In the present invention, the ventilation valve 7 may be provided in the middle of the ventilation path 6 instead of the upper end, but even in this case, the opening 6a facing the upper space 5a of the low tank 5 in the ventilation path 6. Similarly, to open above the inlet 10a of the overflow pipe 10 of the low tank 5,
There is no hindrance to the operation of the ventilation valve 7.

[0013]

(1) According to the first aspect of the present invention, instead of the complicated structure in which a deodorizing fan or the like is provided in the low tank as in the above-mentioned prior art, the drain pipe of the flush toilet and the upper space of the low tank are provided with a ventilation path. Due to the simple structure of communication through the vent valve, even if the inside of the drain pipe is inclined to a negative pressure during washing and draining, the height of the water sealing surface of the stored water in the toilet body can be stabilized without lowering. Therefore, firstly, it is possible to effectively prevent the air from flowing into the drainage pipe from the toilet main body, thereby generating noise, such as gurgling, and secondly, to prevent the odor in the drainage pipe from leaking into the toilet.

(2) In the second aspect of the present invention, since the ventilation pipe is mainly stored and arranged in the low tank, the ventilation pipe does not protrude outside from the flush toilet, and the entire ventilation means can be reduced in space and size. Can be.

(3) According to the third aspect of the present invention, since a flexible ventilation pipe is made to face the outside of the low tank, the space between the low tank and the drain pipe is merely externally connected by a ventilation pipe, so that the storage chamber is partitioned in the low tank. This eliminates the need for labor and allows the existing low tank to be used as it is, or the structure of the flush toilet other than the ventilation pipe can be shared, and the production cost can be reduced.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the following embodiments, and it is needless to say that any modifications can be made within the technical idea of the present invention.

FIG. 1 is a front view of a cutaway main part of a flush toilet according to a first embodiment of the present invention, FIG. 2 is a right side view of a cutaway main part of the flush toilet, and FIG. 3 is an enlarged view of a main part of a low tank of the flush toilet. FIG. 4 is a cross-sectional view of a main part of the low tank, and FIG. 5 is a vertical cross-sectional view of the ventilation valve. As shown in FIGS. 1 and 2, in the flush toilet, a low tank 5 is disposed above the rear surface of the toilet main body 1, and a drain pipe 4 is led out from the toilet main body 1 through a P-type trap portion 3 bent in the vertical direction. The water supply pipe 20 is connected to the upper space 5a of the raw tank 5, and the overflow pipe 11 is erected near the center of the raw tank 5 in front view.
By the turning operation of the handle 21, the washing water in the low tank 5 supplied from the water supply pipe 20 can flow down to the toilet body 1 via a water passage (not shown).

As shown in FIGS. 1 to 5, the low tank 5 is composed of a low tank body 16 and a lid 17, and a partition wall 24 is formed on the right side of the low tank body 16 from the lower end 16b of the low tank body 16 along the upper part. And the inside of the low tank main body 16 is inserted through the partition wall 24 into the storage chamber 1.
2 and a storage tank 23 for washing water supplied from the water supply pipe 20. That is, the storage chamber 12 is provided with the low tank body 16.
Is formed between the right side wall 16a and the partition wall 24 in a rectangular shape in a cross-sectional view and in a vertically long shape.
Is horizontally arranged and partitioned from the storage tank 23, and a fitting insertion opening 12a is opened in a lower portion of the storage chamber 12 (that is, a lower end portion 16b of the low tank main body 16). Support wall 1 for storage room 12
4, the ventilation valve 7 is inserted and fixed via a support cylinder 15, and the lid 1 is
An intake port 18 is opened in the right side wall of 7. The toilet body 1
A communication port 13 is projected obliquely upward from a portion near the trap portion 3 of the drain pipe 4 of the above, and a flexible ventilation pipe 6 made of synthetic resin is accommodated and arranged along the storage chamber 12 of the low tank 5. ,
The upper opening 6a of the ventilation pipe 6 is gripped by the holding tube 1
5, the ventilation pipe 6 communicates with the valve cylinder 22 of the ventilation valve 7, and the lower opening of the flexible ventilation pipe 6 is fitted and fixed to the communication port 13 of the drain pipe 4 by the gripping means 19. .

As shown in FIG. 5, the ventilation valve 7 has a cylindrical valve cylinder 22 and a valve cover 25 detachably fitted to each other, and a radial support arm (not shown) is fitted to a flange portion 22a at the upper end of the valve cylinder 22. ), An annular valve port 8 and a valve seat 9 are provided, and a support rod 26 is vertically provided downward from the center of the valve lid 25, and a valve base 27 is loosely fitted to the support rod 26 in a vertically slidable manner. Then, the donut-shaped valve body 10 is horizontally and integrally fixed to the outer peripheral portion of the valve body base 27, and the valve body 1 is fixed.
0 is seated on the valve seat 9 of the valve cylinder 22 from above so as to be seated thereon, and the support cylinder 15 is fixed to the support wall 14 of the storage chamber 12.
The lower part of the valve case 22 is fitted and fixed to the valve case 22 so that the valve case 22 communicates with the upper opening 6 a of the ventilation pipe 6. However, valve base 2
A vent 27a is opened at the center of 7 and communicates with the internal space 25a of the valve lid 25. Further, the valve port 8 of the ventilation valve 7 is opened to a higher position than the inlet 11a of the overflow pipe 11 of the low tank 5 by an appropriate distance R (see FIG. 1). The valve body 10 is made of ethylene-propylene copolymer, ethylene-propylene-diene terpolymer, silicone, or various rubbers such as fluorine. The valve cylinder 22 and the valve lid 25 are made of epoxy resin, polyamide resin, Polycarbonate resin,
It is preferable to use ABS resin, EPSAN resin or the like as a material.

In this case, when the pressure of the vent pipe 6 becomes negative with respect to the outside air, the valve body 10 is pushed to the outside air pressure A through the valve port 8 as shown by the solid line in FIG. Is slid upward along the support rod 26 against its own weight, the ventilation valve 7 switches its posture to the valve opening position P away from the valve seat 9. Conversely, when the pressure of the ventilation pipe 6 becomes positive with respect to the outside air,
As shown by the phantom line in FIG. 5, the positive pressure B is applied to the valve cylinder 22, the vent 27 a of the valve base 27, and the internal space 25 of the valve lid 25.
a to the inner space 25 a of the valve lid 25.
The valve body 10 is supported by the support rod 2
6, the ventilation valve 7 switches its posture to a valve closing position Q in which it is seated on the valve seat 9.

Therefore, the function of the flush toilet of the first embodiment will be described. In general, when the flush toilet is washed, or drainage of the toilet and hand washing is performed at another location, the drainage flow in the flush pipe 4 of the flush toilet easily becomes negative with respect to the outside air. When the negative pressure state in the drain pipe 4 is maintained after the drainage operation is completed, the water sealing surface 2 of the stored water of the toilet body 1 tends to descend by receiving the external air pressure from above, so that the air flows from the toilet body 1. Inflows into the drain pipe 4 may cause noise such as gurgling, or conversely, odors in the drain pipe 4 may leak to the toilet body 1.

In the flush toilet of the first embodiment, when the drain pipe 4 tilts to a negative pressure state, this negative pressure propagates to the drain pipe 4, the ventilation pipe 6 and the ventilation valve 7 in order, and is indicated by a solid line in FIG. As described above, the valve element 10 of the ventilation valve 7 arranged at the upper end of the ventilation pipe 6
, The outside air flows into the drain pipe 4 from the upper space 5a of the low tank 5 through the ventilation valve 7 and the ventilation path 6, and the inside of the drain pipe 4 becomes equal to the external pressure of the upper space 5a of the low tank 5. . Therefore, the stored water in the toilet body 1 is also pressed from the inside of the drain pipe 4 at a pressure equal to the outside air pressure.
It is possible to antagonize the external air pressure applied to the water sealing surface 2 from above, thereby suppressing the lowering of the water sealing surface 2 of the stored water and stabilizing the height of the water sealing surface 2. As a result, the generation of the noise and the leakage of the odor are effectively prevented.

Conversely, when the inside of the drain pipe 4 is at a positive pressure with respect to the outside air, this positive pressure propagates from the drain pipe 4 to the vent valve 7 at the upper end of the drain pipe 4 via the vent pipe 6. As shown by the imaginary line, the valve body 10 of the ventilation valve 7 is displaced to the valve closing position Q,
The odor in the drain pipe 4 does not flow backward through the ventilation path 6 to the upper space 5a of the raw tank 5 and leak out. Further, since the valve port 8 of the vent valve 7 opens above the inlet 10a of the overflow pipe 10 of the low tank 5, the valve port 8 is not closed even when the washing water reaches the maximum water level. Always works effectively.

As described above, the first embodiment is characterized in that the drain pipe 4 and the upper space 5a of the low tank 5 are communicated with each other by the ventilation pipe 6, so that the deodorization is performed in the low tank as in the prior art described above. There is no need for a complicated structure for storing a fan or the like. In addition, a storage chamber 12 is formed in the low tank 5 by partitioning,
The flexible ventilation pipe 6 is housed in the storage chamber 12 and the ventilation pipe 6
Since the ventilation valve 7 is arranged at the upper end of the toilet and the ventilation pipe 6 and the ventilation valve 7 are mainly stored in the low tank 5, these ventilation means do not protrude outside the flush toilet, so that space can be saved. In addition to being compact, the flush toilet can have an excellent appearance.

FIG. 7 shows a flush toilet according to a second embodiment of the present invention. In contrast to the first embodiment in which the ventilation pipe 6 and the ventilation valve 7 are housed in the low tank 5, this embodiment is different from the first embodiment. 2
Is a so-called externally attached vent pipe 6. That is, the ventilation valve 7 is fixed to the upper part of the right side wall 16a of the low tank body 16 in a horizontal direction, and the communication port 13 protruding from the drain pipe 4 and the ventilation valve 7
Are connected by a flexible ventilation pipe 6. Internal structure of ventilation valve 7, inlet 1 at upper end of overflow pipe 11
The positional relationship between 1a and the valve port of the ventilation valve 7, the structure of the intake port 18 opening in the lid 17 of the low tank 5, and the like are basically the same as those in the first embodiment.

In the second embodiment, since the ventilation pipe 6 is externally attached, unlike the first embodiment, there is no need to divide the storage chamber 12 in the low tank 5, and the existing low tank 5 can be utilized as it is. Alternatively, the structure of the flush toilet other than the ventilation pipe 6 can be shared. Therefore, the ventilation means can be further simplified, and the production cost can be reduced. In addition, in the present invention, like the rim water passage of the flush toilet (see reference numeral 110 in FIG. 8), the whole of the ventilation passage 6 is formed of the drain pipe 4, the toilet body 1, and the low tank 5 contrary to the second embodiment. An internal passage structure buried in the wall by integral molding can also be used.

FIG. 6 shows a modified example of the ventilation pipe 6 and the ventilation valve 7. In both the first and second embodiments, the ventilation valve 7 is arranged at the upper end of the ventilation pipe 6. In the example,
A ventilation valve 7 is interposed in the middle of the ventilation pipe 6. The ventilation valve 7 has a valve body 10 loosely and vertically slidably fitted to a support wall 30 of the ventilation pipe 6, an annular valve seat 9 provided in the ventilation pipe 6 and facing the valve body 10 from above, and a valve body. And a valve spring 31 for urging the valve 10 toward the valve seat 9. However, the valve spring 31 has a very weak spring constant enough to seat the valve body 10 on the valve seat 9. The lower opening (not shown) of the ventilation pipe 6 communicates with the drain pipe 4 and the ventilation pipe 6
The upper opening 6a faces the upper space 5a of the low tank 5, and the upper opening 6a is of course arranged higher than the inlet 11a at the upper part of the overflow pipe 11.

The function of this modified example will be described. When the inside of the drain pipe 4 becomes a negative pressure with respect to the outside air pressure by the drainage treatment, the negative pressure reaches the vent valve 7 from the drain pipe 4 through the vent pipe 6. As shown in FIG. 6A, the valve body 10 pressed from above against the external air pressure indicated by the arrow causes the valve seat 9 to resist the elastic force of the valve spring 31.
, The posture is switched to the valve opening position P, and a pressure equal to the outside air pressure propagates in the drain pipe 4. As a result, the toilet body 1
Since the stored water is pushed from the inside of the drain pipe 4 by this pressure, the height of the sealing surface of the stored water which is pushed down by the outside air pressure and stabilized is stabilized. Conversely, when the drain pipe 6 side is at a positive pressure with respect to the outside air pressure, the positive pressure (see the arrow) passes through the vent pipe 6 to the vent valve 7, and the valve body 10 is seated on the valve seat 9. The attitude is switched to the valve closing position Q. As a result, the odor of the drain pipe 6 does not leak from the ventilation pipe 6 to the low tank 5.

[Brief description of the drawings]

FIG. 1 is a cutaway front view of a main part of a flush toilet according to a first embodiment of the present invention.

FIG. 2 is a right side cutaway view of a main part of the flush toilet.

FIG. 3 is an enlarged partial cutaway right side view of a main part of a low tank of the flush toilet.

FIG. 4 is a cross-sectional view of a main part of the low tank.

FIG. 5 is a vertical sectional view of a vent valve.

6 is a longitudinal sectional view showing a modified example of the ventilation pipe and the ventilation valve, FIG. 6A is a corresponding view showing a valve opening position of the ventilation valve, and FIG. 6B is a corresponding view showing a valve closing position of the ventilation valve, respectively.

FIG. 7 is a cutaway front view of a main part of a flush toilet according to a second embodiment of the present invention.

FIG. 8 is a vertical sectional left side view of a flush toilet according to the related art.

[Explanation of symbols]

1 ... toilet body, 2 ... sealing surface of stored water, 3 ... trap section,
Reference numeral 4: drain pipe, 5: low tank, 5a: upper space of the low tank, 6: ventilation path, 6a: opening of the ventilation path, 7: ventilation valve, 8: valve port, 9: valve seat, 10: valve body, 11 ... Overflow pipe, 11a ... Inflow pipe inlet, 12 ... Storage chamber, P ... Vent valve open position, Q ... Vent valve close position.

Claims (3)

[Claims] 1. A low tank is provided above a rear surface of a toilet body (1).
In the flush toilet where the drain pipe (4) is led out from the toilet body 1 through the trap portion (3) bent in the vertical direction, the upper space (5a) of the low tank (5) and the drain pipe are arranged. (4) is communicated through a ventilation path (6), and a ventilation valve (7) is provided in the ventilation path (6). The ventilation valve (7) is connected to a valve body (10) facing the ventilation path (6). seat
(9), a valve opening position (P) at which the valve element (10) separates from the valve seat (9) due to a negative pressure in the drain pipe (4) against the outside air;
The attitude of the valve body (10) can be switched to a valve closing position (Q) where the valve body (10) is seated on the valve seat (9) by receiving a positive pressure in the drain pipe (4) against the outside air. The opening (6a) facing the upper space (5a) of the low tank (5) or the opening (8) of the ventilation valve (7) is opened higher than the inlet (11a) of the overflow pipe (11) of the low tank (5). A flush toilet with a sealed surface descent prevention feature. 2. A storage chamber (12) is provided vertically in one side of a low tank (5), a communication port (13) is provided in a drain pipe (4), and a ventilation valve (7) is connected to the storage chamber (12). )
2. The connection according to claim 1, wherein the connection port (13) of (4) and the ventilation valve (7) are connected by a flexible ventilation pipe (6) facing the storage chamber (12). A flush toilet that prevents the water level from falling. 3. The air passage according to claim 1, wherein the air passage is a low tank.
(5) A flush toilet with a water-sealing surface lowering prevention type, which is a flexible ventilation pipe facing outside.