JP2003206560A - Drain trap with suction valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the possibility of the rupture of sealing water by a guided syphonage, prevent discomfortable noise from occurring at the time of drainage, and improve the flow of drain in a drain trap fitted to a floor drain. <P>SOLUTION: This drain trap 11 comprises a bottomed outer tube 2 having drain water overflowing hole 23 and a vent hole 25 provided in the peripheral wall 22 thereof; a cover 3 having a through hole 30 at the center part thereof and covering the upper end opening of the bottomed outer tube 2; an inner tube 4 connected downward to the cover 3; and a drain hose connection port 5 connected upward to the cover 3. The suction valves 6 for introducing outside air A into a drain pipe P through an inside annular space part S2 between the bottomed outer tube 2 and the inner tube 4 and the vent hole 24 when the inside of a drain pipe P is brought into the state of negative pressure is fitted to the cover 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain trap which is installed at a floor drain for draining water from a washing machine or the like to form trap water.

[0002]

2. Description of the Related Art As a drain trap of this type, there are a bottomed outer cylinder which is inserted into an upper end of an equipment drainage pipe connected to a floor drainage port, and a peripheral wall has a drainage overflow hole, and a bottomed outer cylinder. With a lid that covers the upper end opening and has a through hole in the center, an inner cylinder that is connected downward to the through hole of the lid, and a drain hose connection port that is connected upward to the through hole of the lid It has been known.

In the above-mentioned drain trap, drainage from a washing machine or the like flows into the inner cylinder from the hose connection port via the drain hose, and between the lower end of the inner cylinder and the bottom wall of the bottomed outer cylinder. Between the peripheral wall of the bottomed outer cylinder and the inner peripheral surface of the upper end of the drain pipe through the drain overflow hole through the lower void part and the inner annular gap part between the peripheral walls of the inner cylinder and the bottomed outer cylinder. Run down into the instrument drain including the outer annular void. The drainage that has flowed in the equipment drainage pipe usually further flows into the sewer through the drainage horizontal branch pipe, the drainage vertical pipe, and the drainage horizontal main pipe. Then, when the inflow of the drainage from the washing machine or the like is finished, the drainage is accumulated inside the bottomed outer cylinder and the inner cylinder at a water level lower than the drain overflow hole, thereby forming a sealed water. This sealing water prevents odors and harmful insects in the drain pipe from leaking into the space above the floor.

By the way, in a drainage system of a housing complex, for example, the drainage lateral branch pipe on the lower floor is filled with the drainage, so that the inside of the equipment drainage pipe is in a negative pressure state, thereby sealing the drainage trap. Is attracted to the drain pipe side and the sealing water is destroyed, that is, there is a problem of induction siphon action. Therefore, conventionally, at the upper end of the drainage stack, an intake valve for introducing outside air when the inside of the drainage pipe is in a negative pressure state is provided to prevent breakage of sealing water in the drainage trap.

[0005]

However, when a plurality of instrument drain pipes are connected to one drain horizontal branch pipe,
With the drainage from the equipment drainage pipe connected to the upstream side of the drainage horizontal branch pipe, the inside of the equipment drainage pipe connected to the downstream side of the drainage horizontal branch pipe may be in a negative pressure state. In this case, the intake valve at the upper end of the drainage stack does not function sufficiently and the sealing of the drainage trap is destroyed. Therefore, even in the above-mentioned drain trap installed in the floor drain port, when the inside of the drain pipe becomes a negative pressure state by the same induction siphon action, the drainage accumulated in the drain trap is attracted to the drain pipe side to seal the water. May be destroyed.

Further, while the drainage from the washing machine, etc. flows down the drainage pipe through the drainage trap, the outer annular void portion is in a negative pressure state. When the outer annular void is in a negative pressure state in this way, the drainage in the drainage trap is sucked toward the drainage pipe side due to the pressure difference, but especially when the drainage flows in the drainage trap in a full state. No problem. However, when the inflow amount of the wastewater is gradually reduced and air is introduced into the wastewater trap together with the wastewater, the air is mixed into the wastewater by the suction action. Then, an unpleasant noise is generated, and the drainage flow also deteriorates.

The object of the present invention is, in a drain trap installed at a floor drain, there is no fear that the sealing water will be destroyed by the induction siphon action, and no unpleasant noise is generated during drainage.
It is to improve the flow of drainage.

[0008]

The above object can be achieved by the drain trap with the intake valve according to the present invention.

That is, the first drain trap with an intake valve according to the present invention covers the bottomed outer cylinder inserted into the upper end of the drainage pipe connected to the floor drainage port and the upper end opening of the bottomed outer cylinder. It has a lid with a through hole in the center, an inner cylinder connected downward to the lid so as to communicate with the through hole, and a drain hose connection port that is upwardly connected to the lid so as to communicate with the through hole. There is something. The inner cylinder has such a length that a lower space is formed between the inner cylinder and the bottom wall upper surface of the bottomed outer cylinder, and an inner annular space is formed between the inner cylinder and the peripheral wall inner peripheral surface of the bottomed outer cylinder. It has a large outer diameter. The upper end of the peripheral wall of the bottomed outer cylinder is
A large-diameter portion having an outer diameter that allows it to be joined to the inner peripheral surface of the upper end portion of the drainage pipe, and the portion below the upper end portion is an outer annular gap between the inner peripheral surface of the upper end portion of the drainage pipe. The drainage overflow hole and the ventilation hole located above the drainage overflow hole are formed in the upper portion of the small diameter portion. The lid is provided with an intake valve that introduces outside air into the drain pipe through the inner annular gap and the vent when the drain pipe is in a negative pressure state.

In the above drain trap with the intake valve, when the inside of the drain pipe becomes a negative pressure, outside air is introduced from the intake valve into the drain pipe including the outer annular void portion through the inner annular void portion and the vent hole. be introduced. Here, there are two cases where the inside of the drainage pipe is in a negative pressure state, as is clear from the description in the section of the problem to be solved. One is the case where the drainage flows in the other drainage pipes in a full state and the induction siphon action occurs.
In this case, the entire drain pipe including the outer annular void portion is in a negative pressure state, but the negative pressure state is canceled by introducing the outside air into the drain pipe by the intake valve provided in the drain trap itself as described above. Therefore, regardless of the positions of other drainage pipes in which the drainage is full, the breakage of the sealed water is reliably prevented. The other is the case where the drainage flows down the drainage pipe through the drainage trap. In this case, the outer annular space partly becomes a negative pressure state, but since the negative pressure state is canceled by introducing the outside air into the outer annular space part by the intake valve as described above, the drainage is finished. Even when approaching, there is no possibility that air will mix into the drainage and an unpleasant sound will be produced, or the flow of drainage will be impaired.

In the first drain trap with intake valve according to the present invention, the inner annular void portion is divided by the horizontal annular partition into a drainage circulation portion communicating with the drainage overflow hole and an outside air circulation portion communicating with the ventilation hole. Is preferred.

If the inner annular space is divided into the drainage circulation portion and the outside air circulation portion by the partition as described above,
The drainage is prevented from flowing back to the intake valve through the inner annular space, and the outside air is reliably introduced into the drainage pipe from the intake valve. Here, the horizontal annular partition may be constituted by a horizontal annular partition member formed separately from the bottomed outer cylinder and the inner cylinder, or on at least one of the peripheral walls of the bottomed outer cylinder and the inner cylinder. It may be configured by a horizontal annular partition formed integrally with these.

In the first drain trap with an intake valve according to the present invention, in addition to the partition, the reverse flow of the drainage to the intake valve is provided in the portion between the drainage overflow hole and the ventilation hole on the outer peripheral surface of the small diameter portion. There is a check valve to prevent
More preferable.

If the check valve as described above is provided, it is possible to more reliably prevent the backflow of the drainage to the intake valve. This check valve is made of, for example, an elastic material such as rubber, and has a skirt shape attached to the outer peripheral surface of the small diameter portion so that the outer peripheral edge portion contacts the inner peripheral surface of the upper end portion of the drainage pipe. You can When the flow rate of the drainage is large and the flow is strong, the check valve is closed by the pressure of the drainage flow and the intake valve does not operate. Then, when the drainage approaches the end and the momentum of the drainage flow weakens, the above-mentioned check valve opens, the intake valve operates, and the outside air flows to the portion below the check valve in the outer annular cavity. Is introduced, and the negative pressure state of the portion is released. Therefore, due to the negative pressure suction action, air is mixed into the drainage, an unpleasant sound is generated, and a problem that the flow of the drainage is deteriorated is less likely to occur.

A second drain trap with an intake valve according to the present invention is the drain trap with a first intake valve according to the present invention, wherein a drain overflow hole is provided above the small diameter portion, and a drain overflow hole is provided above the drain overflow hole. It has a small diameter instead of the vent hole that is located and the lid is provided with an intake valve that introduces outside air into the drain pipe through the inner annular void portion and the vent hole when the inside of the drain pipe becomes a negative pressure state. A ventilation and drainage overflow hole is opened in the upper part of the section, and an intake valve that introduces outside air into the drainage pipe through the inner annular gap and the ventilation and drainage overflow hole is provided in the lid when the inside of the drainage pipe is in a negative pressure state. It is what

The second drain trap with the intake valve also has substantially the same effect as the first drain trap with the intake valve. The ventilation and drainage overflow holes are
In order to surely exhibit its function, it is preferable that the drain trap is enlarged upward as compared with the drain overflow hole of the first drain trap with the intake valve.

In the first and second drain traps with intake valves according to the present invention, the intake valve communicates with the annular valve chamber formed inside the lid and the space above the floor at the outer portion of the bottom wall of the valve chamber. Has an opening formed in the valve chamber, a communication hole formed in the inner portion of the bottom wall of the valve chamber so as to communicate with the inner space, and has a size that can be moved up and down in the valve chamber and can block the intake hole. When the drain pipe is in a negative pressure state, the valve body floats from the bottom wall of the valve chamber due to the difference in atmospheric pressure between the valve chamber communicating with the drain pipe and the space above the floor, and the valve is equipped with an annular valve body. When the outside air is introduced and the negative pressure state in the drain pipe is released, the valve body may drop to the bottom wall of the valve chamber due to its own weight, and the intake hole may be blocked.

If the structure of the intake valve is as described above, the structure is simple and it can be easily manufactured. Moreover, the valve opening / closing operation is automatically and reliably performed by the pressure difference between the drain pipe and the space above the floor, and there is no fear of odor leakage or drainage backflow to the space above the floor.

In the case where the intake valve has the above structure,
It is more preferable that a plurality of inward projections that are in contact with the inner peripheral wall of the valve chamber and guide the up and down movement of the valve body are provided at the inner peripheral edge of the valve body at intervals in the circumferential direction.

If the valve body is provided with the above-mentioned inward projection, the intake hole can be surely closed and opened by raising and lowering the valve body.

In the first and second drain traps with intake valves according to the present invention, the inner cylinder may be formed of a soft resin integrally with the drain hose connection port.

In the above case, since the inner cylinder and the drainage hose connection port are integrated, the number of parts is reduced accordingly. In addition, when connecting to the lid, it is only necessary to insert these integral parts into the through holes of the lid, and since the integral parts are made of soft resin, the insertion part of the integral parts is the inner peripheral surface of the through hole. It does not require a special sealing member. Examples of the soft resin include elastomers and soft vinyl chloride resins.

In the first and second drain traps with intake valves according to the present invention, the inner cylinder may be made of hard resin integrally with the lid, and the drain hose connection port may be made of soft resin.

In the above case, since the inner cylinder and the lid are integrally formed of hard resin, the number of parts is reduced accordingly, and the labor for connecting the inner cylinder to the lid can be saved. Further, since the drain hose connection port is made of a soft resin, by inserting the lower end portion of the drain hose into the through hole of the lid to connect the lower end portion to the inner peripheral surface of the through hole, a special sealing member is provided. It becomes unnecessary. Examples of the hard resin include ABS resin.

Further, in the first and second drain traps with intake valves according to the present invention, the inner cylinder and the drain hose connection port may be separately formed of soft resin.

In the above case, for example, by inserting the upper end portion of the inner cylinder made of a soft resin into the through hole of the lid and connecting the inner cylinder,
The lower end is in close contact with the inner peripheral surface of the through hole, and the lower end of the drain hose connection port made of soft resin is inserted into the upper end of the inner cylinder to connect the lower end to the upper end of the inner cylinder. Since it adheres to the inner peripheral surface of the part, no special sealing member is required.

In the first and second drain traps with intake valves according to the present invention, the bottomed outer cylinder is joined to the inner peripheral surface of the upper end of the drain pipe having the smaller inner diameter of the two types of drain pipes having different inner diameters. A bottomed outer cylinder body having a large-diameter portion having an outer diameter that can be obtained at the upper end of the peripheral wall, and the inner peripheral surface of the upper end of the drain pipe having the larger inner diameter of the two types of drain pipes. An annular adapter having an outer diameter and optionally fitted and joined to the large diameter portion of the bottomed outer cylinder main body is provided, and in the case of being inserted into the upper end portion of the drain pipe having the smaller inner diameter, When it is configured only by the bottomed outer cylinder body and is inserted into the upper end of the drain pipe having the larger inner diameter, it may be configured by the bottomed outer cylinder body and the adapter.

In the above case, whether the drain pipe is composed of, for example, a VU pipe (a pipe having a large inner diameter) or a VP pipe (a pipe having a small inner diameter), it can be easily performed only by using an adapter. It is convenient because it can correspond to.

[0029]

1 to 3 show a first embodiment of the present invention. In these figures, a drain trap (11) with an intake valve (6) according to the present invention is a bottomed outer cylinder (2) inserted into the upper end of a drain pipe (P) connected to a floor drain (D).
Covers the upper opening of the bottomed outer cylinder (2) and has a through hole in the center.
The lid (3) with the (30) opened, the inner cylinder (4) downwardly connected to the lid (3) so as to communicate with the through hole (30), and the lid (3) communicated with the through hole (30). It is provided with a drain hose connection port (5) connected to 3) upward. The inner cylinder (4) is the bottom wall of the bottomed outer cylinder (2).
(21) While having a length such that a lower space (S1) is generated between the inner surface and the inner wall of the outer wall (22) of the bottomed outer cylinder (2) and the inner surface of the inner wall (22). Has an outer diameter such that
The peripheral wall (22) of the bottomed outer cylinder (2) has a large diameter portion (2) having an outer diameter such that the upper end portion thereof can be joined to the inner peripheral surface of the upper end portion of the drainage pipe (B).
21) and the part below the upper end is
Outer annular space (S3) between the inner peripheral surface of the upper end of the drainage pipe (B)
A small diameter portion (222) having an outer diameter that causes the occurrence of a drainage overflow hole (23) and a drainage overflow hole (2) above the small diameter portion (222).
The ventilation hole (24) located above 3) is opened. Then, the outside air (A) is introduced into the drain pipe (B) through the inner annular space (S2) and the vent hole (24) when the drain pipe (B) is in a negative pressure state in the lid (3). An intake valve (6) is provided.

The bottomed outer cylinder (2) is composed of two types of drain pipes having different inner diameters, namely, a drain pipe (B) having a large inner diameter made of a VU pipe and a drain pipe (not shown) having a small inner diameter made of a VP pipe. Outer cylinder body (2A) with a bottom having a large diameter portion (221A) having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe having a smaller inner diameter, and a bottomed outer cylinder main body (2A), and the above two types Of the drainage pipes with a large inner diameter, it has an outer diameter that allows it to be joined to the inner peripheral surface of the upper end of the drainage pipe (B), and optionally fits it on the large diameter part (221A) of the bottomed outer cylinder body (2A). And an annular adapter (2B) that is joined and joined. And, when inserted into the upper end of the drain pipe with a small inner diameter, it is composed only of the bottomed outer cylinder body (2A), and when inserted into the upper end of the drain pipe with a large inner diameter (B), It is composed of a bottomed outer cylinder body (2A) and an adapter (2B). Therefore, in the latter case, the peripheral wall (22) of the bottomed outer cylinder (2)
The large-diameter portion (221) is composed of the large-diameter portion (221A) of the bottomed outer cylinder body (2A) and the adapter (2B). 1 and 2
In the figure, a state in which the bottomed outer cylinder (2) is inserted into the drain pipe (B) having a large inner diameter made of a VU pipe is illustrated. Bottomed outer cylinder body
The (2A) and the adapter (2B) are made of a hard resin such as ABS resin. Bottomed outer cylinder body (2A) and adapter (2A
B) and the bottomed outer cylinder body (2A) or adapter
The joining of (2B) and the inner peripheral surface of the upper end of the drainage pipe (B) is performed by using, for example, an adhesive.

An annular outward flange (25) is integrally formed on the upper end of the bottomed outer cylinder (2). The flange (25) is engaged with the inner peripheral edge of the upper surface of the horizontal ring-plate shaped floor drain cover (7) placed on the peripheral edge of the floor drain (D). A rising wall (71) is integrally formed near the inner peripheral edge of the floor drain cover (7). A female screw portion (711) is formed on the inner peripheral surface of the rising wall (71).

There are several drainage overflow holes (23), each of which has a large horizontal rectangular shape, and is arranged near the upper end of the small diameter portion (222) at intervals in the circumferential direction. Vent
There are a plurality of (24) in total, each of which is in the shape of a small horizontal rectangle, and are arranged at the upper end of the small diameter portion (222) at intervals in the circumferential direction.

The inner cylinder (4) is made of a soft resin such as an elastomer and formed integrally with the drain hose connection port (5). The inner tube (4) and drain hose connection (5) are
By being inserted into the through hole (30) of (3), the lid (3)
It is connected to the. The hole insertion portion of the integrated body is a through hole.
It is in close contact with the inner peripheral surface of (30).

The drain hose connection port (5) is bent at its upper end sideward into an L shape. Drain hose connection
The upper end (51) of (5) is slightly outwardly extended so that the tip of the drain hose (H) of a washing machine or the like can be easily inserted. Also,
Outside the upper end of the drain hose connection port (5), attach the upper end (5
A hose fastener (52) for fastening and fixing the tip of the drain hose (H) inserted in 1) is provided.

The inner annular space (S2) is a horizontal annular partition (8)
The drainage circulation part (S21) leading to the drainage overflow hole (23)
And the outside air circulation portion (S22) communicating with the ventilation hole (24). The partition (8) above is the small diameter part (22) of the bottomed outer cylinder (2).
2) A horizontal annular partition member (8) interposed between the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface and the inner cylinder (4) outer peripheral surface portion facing the portion. It is composed by.
The inner peripheral surface of the partition member (8) is in close contact with the outer peripheral surface of the inner cylinder (4) made of a soft resin. The outer surface of the partition member (8) has a bottomed outer cylinder.
A seal member (81) that can be brought into close contact with is attached to a portion between the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface of the small diameter portion (222) of (2). The seal member (81) is composed of, for example, an O-ring.

The drainage overflow hole (2
Drain the intake valve (6) between the 3) and the vent (24).
A check valve (9) is provided to prevent backflow of (W). The check valve (9) is made of an elastic material such as rubber, and is provided on the outer peripheral surface of the small diameter portion (222) so that the outer peripheral edge portion (91) contacts the inner peripheral surface of the upper end portion of the drainage pipe (B). It is attached to a skirt.

The lid (3) is composed of a lower lid member (3A) and an upper lid member (3B).

The lower lid member (3A) includes an inner peripheral wall (31) forming the through hole (30), a bottom wall (32) extending outward from the lower end of the inner peripheral wall (31), and a bottom wall. The drooping wall (33) extends downward from the width center of the (32) and has a lower end received by the upper end surface of the bottomed outer cylinder (2) through the annular seal member (10). Hanging wall (33)
A male screw part (331) is formed on the outer peripheral surface of the
1) is the female screw part (711) of the rising wall (71) of the floor drain cover (7)
It is screwed on. As a result, the lower lid member (3A)
Is integrated with the floor drain cover (7). The bottom wall (32) of the lower lid member (3A) has a portion inside the hanging wall (33) that is an inclined wall portion (321) extending obliquely downward toward the inside, and is more than the hanging wall (33). The outer part is also horizontal wall (322)
Has been made. The horizontal wall (322) is the floor drain cover (7).
It overhangs outside the rising wall (71).

On the other hand, in the upper lid member (3B), the inner peripheral edge portion is received by the inner peripheral wall (31) of the lower lid member (3A), the top wall (34) received at the upper end, and the inner portion of the lower lid member (3A). Peripheral wall (31) Top wall (34) so as to overlap the outer surface
It has an inner hanging wall (35) extending downward from the inner peripheral edge thereof and an outer hanging wall (36) extending downward from the outer peripheral edge of the top wall (34). An annular groove in the center of the height of the inner surface of the outer hanging wall (36)
(361) is formed. The outer peripheral edge portion of the bottom wall (32) of the lower lid member (3A) is fitted into the annular groove (361). As a result, the upper lid member (3B) is connected and integrated with the lower lid member (3A).

The intake valve (6) has an annular valve chamber (61) formed inside the lid (3) and an upper floor space (S) at an outer portion of the bottom wall (611) of the valve chamber (61). An intake hole (62) opened to communicate, a communication hole (63) opened to communicate with the inner annular space (S2) in the inner portion of the bottom wall (611) of the valve chamber (61), An annular valve element (64) is arranged in the valve chamber (61) so as to be able to move up and down and has a size capable of closing the intake hole (62). Then, when the inside of the drain pipe (B) is in a negative pressure state, the valve body (64) is closed by the pressure difference between the valve chamber (61) communicating with the drain pipe (B) and the space above the floor (S). When the outside air (A) is introduced from the intake hole (62) by floating from the bottom wall (611) of the (61) and the negative pressure state in the drain pipe (B) is eliminated, the valve body (64) is caused by its own weight. Falls to the bottom wall (611) of the valve chamber (61), and the intake hole (62) is closed.

The annular valve chamber (61) is an inner peripheral wall of the lower lid member (3A).
(31) and the bottom wall (32), and the top wall (34) of the upper lid member (3B), the inner hanging wall (35) and the upper half of the outer hanging wall (36).

There are a plurality of intake holes (62) in total, each of which has a substantially horizontal rectangular shape when viewed from the plane, and is located outside the bottom wall (611) of the valve chamber (61), that is, the lower lid member. The horizontal wall portion (322) of the bottom wall (32) in (3A) is provided at intervals in the circumferential direction.

There are a plurality of communication holes (63) in total, each of which has a substantially rectangular shape when viewed from the top, and the bottom wall (6) of the valve chamber (61).
11) inner part, that is, the bottom wall (3A) of the lower lid member (3A).
The inclined wall portion (321) of 2) is provided at intervals in the circumferential direction.

The valve element (64) is, for example, an annular plate-like member made of rubber or the like generally used as a packing material. The inner peripheral edge (612) of the valve chamber (61) (the inner hanging wall (35) of the upper lid member (3B)) is brought into contact with the inner peripheral edge of the valve body (64) to guide the lifting and lowering of the valve body (64). A plurality of inward convex portions (641) are provided at intervals in the circumferential direction.

Next, the function of the drain trap (11) with the intake valve (6) will be described with reference to FIGS. 1 and 2.

First, when draining water from a washing machine or the like, as shown in FIG. 1, the drainage (W) flows through the drainage hose (H) from the drainage hose connection port (5) to the inner cylinder (4). ), And the drainage flow portion (S) of the lower void (S1) and the inner annular void (S2).
21), through the drainage overflow hole (23) to the outer annular space (S3)
It flows down into the drain pipe (B) including the.

Here, when the flow rate of the waste water (W) is large and the force of the flow is strong, it is reversed due to the pressure of the flow of the waste water (W) discharged from the drain overflow hole (23) as shown by the broken line in FIG. The outer peripheral edge portion (91) of the stop valve (9) is pressed against the inner peripheral surface of the upper end portion of the drain pipe (P), and the check valve (9) is closed. As a result, the backflow of the drainage (W) to the intake valve (6) is reliably prevented. Further, in this state, the drainage (W) flows in a portion below the check valve (9) in the outer annular space (S3) in a state where the drainage (W) is almost full, but the portion is partially in a negative pressure state. It can be.
However, in this state, almost no air comes into the drain trap (11) from the drain hose (H), so that the problem of generation of unpleasant noise and deterioration of flow condition does not occur.

When the flow rate of the waste water (W) decreases and the momentum of the flow weakens, the check valve (9) opens as shown by the solid line in FIG. In this state, the outer annular space (S3)
When a negative pressure occurs, the valve element (64) causes the valve body (64) to move to the bottom wall (611) of the valve chamber (61) due to the pressure difference between the valve chamber (61) communicating with the outer annular space (S3) and the space above the floor (S). ) From the intake hole (62)
Outside air (A) is introduced into (61). The outside air (A) introduced is
Communication hole (63), outside air circulation portion (S22) of the inner annular void portion (S2),
And it is introduced into the outer annular space (S3) through the ventilation hole (24). As a result, the negative pressure state of the outer annular space (S3) is eliminated. Therefore, there is no possibility that an unpleasant noise is generated or the flow of drainage is deteriorated due to the mixing of air into the drainage (W) due to the negative pressure suction action.

When the negative pressure condition in the drain pipe (B) is eliminated,
As shown in FIG. 2, the valve body (64) is attached to the bottom wall (6) of the valve chamber (61) by its own weight.
It descends to 11), which blocks the intake hole (62).
Then, when the drainage from the washing machine or the like is completely finished, the drainage collects inside the bottomed outer cylinder (2) and the inner cylinder (4) at a water level lower than that of the drain overflow hole (23), thereby sealing water ( W1) is formed. This sealing water (W1) prevents odors and harmful insects in the drainage pipe (B) from leaking into the space above the floor (S). Further, in this state, since the intake valve (6) is also closed, leakage of odor and harmful insects from the intake valve (6) does not occur.

Further, as shown in FIG. 2, the drain trap (11)
In the state where the sealed water (W1) is formed inside, when the drainage flows in the other drain pipes in a full state and the induction siphon action occurs, the drain pipe (B) including the outer annular void (S3) The whole is in negative pressure. Also in this case, the intake valve (6)
Opens and the outside air (A) is introduced into the drain pipe (B). This eliminates the negative pressure condition in the drain pipe (B). Especially in the case of the drain trap (11) with the intake valve (6) according to the present invention, when the position of the other drain pipe in which drainage flows in a full state is the drain pipe connected to the drain horizontal branch pipe of the upper floor Others, drain trap (1
Even if the drainage pipe (B) in which (1) is installed is a drainage pipe connected to the upstream side of the drainage horizontal branch pipe that is connected, it operates reliably and the negative pressure in the drainage pipe (B) is It is excellent in eliminating the condition.

FIG. 4 shows a second embodiment of the present invention. In Figure 4, drain trap with intake valve (6)
The inner cylinder (4) of (12) is covered with a hard resin such as ABS resin.
It is formed integrally with (3). Also, drain hose connection port
(5) is formed of a soft resin such as an elastomer. The inner cylinder (4A) is an inner peripheral wall (31) of the lower lid member (3A).
It is provided in the shape of a pendent from the lower end of the. The drain hose connection port (5) has a pendent lower end (53) through the through hole (3
It is connected to the lid (3) upward by being inserted into the upper end of the inner cylinder (4). The lower end portion (53) of the drainage hose connection port (5) is in close contact with the inner peripheral surface of the through hole (30). An annular outward flange (54) is integrally formed on the uppermost portion of the lower end portion (53) of the drainage hose connection port (5).
The flange (54) is received by the upper end of the inner peripheral wall (31) of the lower lid member (3A). Other configurations and functions are
Is almost the same as the embodiment of.

FIG. 5 shows a third embodiment of the present invention. In Figure 5, drain trap with intake valve (6)
The inner cylinder (4) and the drainage hose connection port (5) of (13) are separately formed of a soft resin such as an elastomer. The inner cylinder (4) is downwardly connected to the lid (3) by inserting the upper end portion (41) thereof into the through hole (30) of the lid (3). The upper end portion (41) of the inner cylinder (4) is in close contact with the inner peripheral surface of the through hole (30). The drain hose connection port (5) has its hanging lower end portion (53) inserted into the upper end portion (41) of the inner cylinder (4) so that the drain hose upwardly faces the lid (3) through the upper end portion (41). It is connected to the. The lower end (53) of the drainage hose connection (5) is located inside the inner tube (4).
It is in close contact with the inner peripheral surface of the upper end (41) of the. The other configurations and functions are almost the same as those of the first embodiment.

FIG. 6 shows a fourth embodiment of the present invention. In the drain trap (14) with the intake valve (6) of FIG. 6, a drain overflow hole and a vent hole are provided above the small diameter portion (222) of the peripheral wall (22) of the bottomed outer cylinder (2). No
Instead of these, a ventilation / drainage overflow hole (26) is provided. There are several ventilation / drainage overflow holes (26) in total, each of which has a rectangular shape that is enlarged further upward than the drainage overflow hole (23) of FIGS. 1 to 3, and has a small diameter portion (222). Are arranged at intervals in the circumferential direction on the upper part of the. In addition, the intake valve of FIG.
The drain trap (14) with (6) does not have an annular partition and a check valve. The other configuration is almost the same as that of the first embodiment.

In the drain trap (14) with the intake valve (6) of FIG. 6, when draining from a washing machine or the like, drain (W)
Flows through the drain hose (H) from the drain hose connection port (5) into the inner cylinder (4), passes through the lower void (S1) and the inner annular void (S2), and vents and drains. The water flows down from the hole (26) into the drain pipe (B) including the outer annular space (S3). At this time, the outer annular space (S3) is partially in a negative pressure state, and accordingly, the valve body (64) floats above the bottom wall (611) of the valve chamber (61) and the intake hole
Outside air (A) is introduced from (62). The outside air (A) introduced is
It is introduced into the outer annular space (S3) through the communication hole (63), the inner annular space (S2) and the ventilation / drainage overflow hole (26). As a result, the negative pressure state of the outer annular space (S3) is eliminated. Therefore, even if the drainage (W) flow becomes less vigorous as the drainage approaches the end, an unpleasant noise is generated due to the mixing of air into the drainage (W) due to the negative pressure suction action, or the drainage (W) There is no risk of the flow becoming worse. When the negative pressure condition in the drain pipe (B) is released, the valve body (64) descends by its own weight and the intake hole (6
2) Block it.

Although illustration is omitted, when the drainage from the washing machine is completely finished, the water level in the bottomed outer cylinder (2) and the inner cylinder (4) is lower than that of the ventilation / drainage overflow hole (26). Wastewater collects, which forms a seal. Further, in this sealed state, even if the entire inside of the drainage pipe (B) including the outer annular void (S3) is in a negative pressure state due to the induction siphon action, the intake valve (6) opens in the same manner as above. The outside air (A) is introduced into the drain pipe (B). As a result, the negative pressure state in the drain pipe (B) is eliminated, and the breakage of the sealing water is prevented.

The above embodiment is merely an example, and it is of course possible to carry out the present invention after appropriately changing it without departing from the scope of the present invention described in the claims. Is.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention,
It is a vertical longitudinal cross-sectional view of the drain trap with an intake valve in the state where drainage is flowing.

FIG. 2 shows the first embodiment of the present invention,
It is a vertical longitudinal cross-sectional view of a drain trap with an intake valve in a sealed state in which drainage is not flowing.

FIG. 3 is a lower perspective view showing the drain trap with the intake valve of FIGS. 1 and 2 in a disassembled state.

FIG. 4 shows a second embodiment of the present invention,
It is a vertical longitudinal cross-sectional view of the drain trap with an intake valve in the state where drainage is flowing.

FIG. 5 shows a third embodiment of the present invention,
It is a vertical longitudinal cross-sectional view of the drain trap with an intake valve in the state where drainage is flowing.

FIG. 6 shows a fourth embodiment of the present invention,
It is a vertical longitudinal cross-sectional view of the drain trap with an intake valve in the state where drainage is flowing.

[Explanation of symbols]

(D): Floor drain (P): Drain pipe (S): Space above the floor (H): Drain hose (11) (12) (13) (14): Drain trap (2): Bottomed outer cylinder (2A): Bottomed outer cylinder body (2B): Adapter (21): Bottom wall (22): Peripheral wall (221) (221A): Large diameter part (222): Small diameter part (23): Drainage overflow hole (24): Vent (3): Lid (30): Through hole (4): Inner cylinder (5): Drain hose connection port (6): Intake valve (61): Valve chamber (611): Bottom wall (of valve chamber) (62): Intake hole (63): Communication hole (64): Disc (641): Inward convex (8): Horizontal circular partition (9): Check valve

Claims (10)

[Claims] 1. A bottomed outer cylinder (2) to be inserted into an upper end of a drainage pipe (P) connected to a floor drainage port (D), and a center which covers an upper end opening of the bottomed outer cylinder (2). Lid (3) with a through hole (30) in its part
And an inner tube (4) connected downward to the lid (3) so as to communicate with the through hole (30), and a drain hose connection upwardly connected to the lid (3) so as to communicate with the through hole (30). The inner cylinder (4) has a mouth (5), and the inner cylinder (4) has a length such that a lower space (S1) is formed between the inner cylinder (4) and the upper surface of the bottom wall (21) of the bottomed outer cylinder (2), The outer wall (22) of the bottomed outer cylinder (2) has an outer diameter such that an inner annular space (S2) is formed between the outer wall and the inner wall of the outer wall (22) of the bottomed outer cylinder (2). Is a large-diameter portion (2) having an outer diameter such that the upper end of the drain pipe (P) can be joined to the inner peripheral surface of the upper end.
21) and the part below the upper end is
Outer annular space (S3) between the inner peripheral surface of the upper end of the drainage pipe (P)
A small diameter portion (222) having an outer diameter that causes the occurrence of a drainage overflow hole (23) and a drainage overflow hole (2) above the small diameter portion (222).
There is a vent hole (24) located above 3), and when the inside of the drainage pipe (P) is in a negative pressure state, the lid (3) has an inner annular space (S2) and a vent hole. A drain trap with an intake valve, comprising an intake valve (6) for introducing outside air (A) into the drain pipe (P) through (24). 2. The inner annular void (S2) is a horizontal annular partition.
(8) allows the drainage flow portion (S2
The drain trap with an intake valve according to claim 1, which is partitioned into 1) and an outside air circulation portion (S22) communicating with the ventilation hole (24). 3. A reverse block for preventing reverse flow of drainage (W) to the intake valve (6) in a portion between the drainage overflow hole (23) and the ventilation hole (24) on the outer peripheral surface of the small diameter portion (222). The drain trap with an intake valve according to claim 2, wherein a stop valve (9) is provided. 4. The drain trap with an intake valve according to claim 1, wherein a drainage overflow hole and a ventilation hole located above the drainage overflow hole are formed in an upper portion of the small diameter portion, and the inside of the drainage pipe is provided in the lid. Instead of being provided with an intake valve that introduces outside air into the drainage pipe through the inner annular gap and the vent when a negative pressure state is reached, the ventilation and drainage overflow hole (26 ) Is opened and the lid (3) has a negative pressure inside the drainage pipe (P), the outside air enters the drainage pipe (P) through the inner annular space (S2) and the ventilation / drainage overflow hole (26). A drain trap with an intake valve, which is provided with an intake valve (6) for introducing (A). 5. An intake valve (6) comprises an annular valve chamber (61) formed inside a lid (3) and an upper floor space (S) at an outer portion of a bottom wall (611) of the valve chamber (61). ) Intake hole (62) opened so that it leads to
A communication hole (63) opened in the inner portion of the bottom wall (611) of the valve chamber (61) so as to communicate with the inner space (S2), and an intake hole that is arranged in the valve chamber (61) so that it can be moved up and down. (62) is provided with an annular valve element (64) having a size capable of closing, and when the drain pipe (P) is in a negative pressure state, a valve chamber (61) communicating with the drain pipe (P) and Space above the floor
The valve body (64) floats from the bottom wall (611) of the valve chamber (61) due to the difference in atmospheric pressure from (S), and the outside air (A) is introduced from the intake hole (62), inside the drain pipe (P). When the negative pressure condition of is released, the valve body (6
5. The method according to claim 1, wherein 4) descends to the bottom wall (611) of the valve chamber (61) and the intake hole (62) is closed.
Drain trap with intake valve described in 3. 6. The inner peripheral wall of the valve chamber (61) at the inner peripheral edge of the valve body (64).
A plurality of inward projections (641) that contact the (612) and guide the lifting and lowering of the valve body (64) are provided at intervals in the circumferential direction,
The drain trap with an intake valve according to claim 5. 7. The drain trap with an intake valve according to claim 1, wherein the inner cylinder (4) is formed of a soft resin integrally with the drain hose connection port (5). 8. The inner cylinder (4) is integrally formed of a hard resin with the lid (3), and the drainage hose connection port (5) is formed of a soft resin. Drain trap with intake valve described in. 9. The drain trap with an intake valve according to claim 1, wherein the inner cylinder (4) and the drain hose connection port (5) are separately formed of a soft resin. 10. A large-diameter portion (2) having an outer diameter such that the bottomed outer cylinder (2) can be joined to the inner circumferential surface of the upper end of the drain pipe having the smaller inner diameter of the two types of drain pipes having different inner diameters. 221A) with a bottomed outer cylinder body (2A) provided at the upper end of the peripheral wall, and an outer diameter that can be joined to the inner peripheral surface of the upper end of the drain pipe (P) with the larger inner diameter of the two types of drain pipes. And an annular adapter (2B) that is fitted and joined to the large diameter part (221A) of the bottomed outer cylinder body (2A) as desired, and the upper end of the drain pipe with the smaller inner diameter The bottomed outer cylinder body (2A) consists only of the bottomed outer cylinder body (2A) when inserted into the upper end of the drain pipe (P) with the larger inner diameter. The drain trap with an intake valve according to any one of claims 1 to 9, wherein the drain trap has an intake valve and an adapter (2B).