JP3911588B2 - Drain trap with intake valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drainage trap that is installed at a floor drainage port through which drainage from a washing machine or the like flows, for example, and forms trap seal water.
[0002]
[Prior art]
This type of drainage trap includes a bottomed outer cylinder inserted into the upper end of an instrument drainage pipe connected to the floor drainage outlet and having a drainage overflow hole in the peripheral wall, and covers the upper end opening of the bottomed outer cylinder and Known is provided with a lid having a through hole in the center, an inner cylinder connected downward to the through hole of the lid, and a drain hose connection port connected upward to the through hole of the lid .
[0003]
In the above drain trap, drainage from a washing machine or the like flows into the inner cylinder from the hose connection port via the drainage hose, and the lower side between the lower end of the inner cylinder and the bottom wall of the bottomed outer cylinder The outer annular gap between the peripheral wall of the bottomed outer cylinder and the inner peripheral surface of the upper end of the drainage pipe from the drainage overflow hole through the gap and the inner annular gap between the peripheral walls of the inner cylinder and the bottomed outer cylinder It flows down into the instrument drain pipe including the part. The wastewater that has flowed through the appliance drainage pipe usually flows into the sewer via the drainage horizontal branch pipe, the drainage standpipe, and the drainage horizontal main pipe. When the inflow of drainage from the washing machine or the like ends, drainage accumulates at a lower level than the drainage overflow hole inside the bottomed outer cylinder and the inner cylinder, thereby forming sealed water. This sealed water prevents odors and pests in the drain pipe from leaking into the space above the floor.
[0004]
By the way, in the drainage system of an apartment house, for example, the drainage flows in the drainage horizontal branch pipe on the lower floor in a full state, and thus the inside of the appliance drainage pipe is in a negative pressure state. There is a phenomenon of induction siphon action that is attracted to the side and the sealed water is destroyed. Therefore, conventionally, an intake valve that introduces outside air when the inside of the drainage pipe is in a negative pressure state is provided at the upper end of the drainage stack to prevent the sealing of the drain trap.
[0005]
[Problems to be solved by the invention]
However, if multiple drainage pipes are connected to one drainage side branch pipe, the drainage side branch pipes accompany the drainage from the instrument drainage pipe connected to the upstream side of the drainage side branch pipe. The inside of the instrument drain pipe connected to the downstream side 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 sealed water in the drainage trap is destroyed. Therefore, even in the above drain trap installed at the floor drain port, when the drain pipe is in a negative pressure state due to the same induction siphon action, the drainage accumulated in the drain trap is attracted to the drain pipe side and the sealed water is There is a risk of being destroyed.
[0006]
Further, while the waste water from the washing machine or the like flows down into the drain pipe through the drain trap, the outer annular gap is in a negative pressure state. Thus, when the outer annular gap is in a negative pressure state, the wastewater in the drainage trap is sucked to the drainage pipe side due to the pressure difference, but especially when the drainage is flowing in the drainage trap in a full state, No problem. However, when the inflow amount of the waste water gradually decreases and air is introduced into the drain trap together with the waste water, the air is mixed into the waste water by the suction action. In this case, an unpleasant sound such as a gurgling sound is generated, and the flow of drainage is also deteriorated.
[0007]
An object of the present invention is to prevent the sealing water from being destroyed by the induction siphon action in the drain trap installed at the floor drain outlet, so that no unpleasant noise is generated during drainage and the drainage flow is improved. It is in.
[0008]
[Means for Solving the Problems and Effects of the Invention]
The above object can be achieved by a drain trap with an intake valve according to the present invention.
[0009]
  That is, the first drain trap with the intake valve according to the present invention covers the bottomed outer cylinder inserted into the upper end of the drain pipe connected to the floor drain outlet, and covers the upper end opening of the bottomed outer cylinder and at the center. It has a lid with a through hole, an inner cylinder connected downward to the lid so as to communicate with the through hole, and a drain hose connection port connected upward to the lid so as to communicate with the through hole. is there. The inner cylinder has such a length that a lower gap is generated between the bottom wall and the bottom wall of the bottomed outer cylinder, and an inner annular gap is formed between the inner cylinder and the peripheral wall of the bottomed outer cylinder. Has a large outer diameter. The peripheral wall of the bottomed outer cylinder is a large-diameter portion having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe, and the lower portion of the upper end portion is the drain pipe A small-diameter portion having an outer diameter such that an outer annular void portion is formed between the inner peripheral surface of the upper end portion of the basin, and a drainage overflow hole and a vent hole located above the drainage overflow hole are formed above the small-diameter portion. It has been opened. And on the lid,An air intake hole is formed to communicate the inner annular gap and the space above the floor,When the drain pipe is in a negative pressure stateOpen the air intake ventOutside air is introduced into the drain pipe through the inner annular gap and vent holeWhen the negative pressure in the drain pipe is resolved, the intake hole is closedAn intake valve is provided.
[0010]
  In the above drain trap with intake valve, when the drain pipe is in a negative pressure state, the intake valveOpens the intake ventOutside air is introduced into the drain pipe including the outer annular gap through the inner annular gap and the vent hole. Here, there are two cases where the inside of the drain pipe is in a negative pressure state, as is apparent from the description of the section of the solution. One is a case where the drainage flows in the other drainage pipe in a full state and the induction siphon action occurs. In this case, the entire inside of the drain pipe including the outer annular gap is in a negative pressure state, but the negative pressure state is eliminated by introducing outside air into the drain pipe by the intake valve provided in the drain trap itself as described above. Therefore, regardless of the position of other drain pipes in which the drainage flows in a full state, destruction of the sealed water is reliably prevented. In the other case, the drainage flows down into the drainage pipe through the drain trap. In this case, the outer annular gap is partially in a negative pressure state, but the negative pressure state is eliminated by introducing the outside air into the outer annular gap by the intake valve as described above, so the drainage ends. There is no risk of unpleasant noises coming out of the wastewater or the flow of the wastewater getting worse.
[0011]
In the first drain trap with the intake valve according to the present invention, it is preferable that the inner annular gap is partitioned by a horizontal annular partition into a drain circulation part that leads to the drain overflow hole and an outside air circulation part that leads to the vent hole. .
[0012]
If the inner annular gap is divided into the drainage circulation part and the outside air circulation part by the partition as described above, the drainage is prevented from flowing back to the intake valve through the inner annular gap, and the intake valve is connected to the inside of the drain pipe. Introducing outside air into the air is also ensured. 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 at least one of the peripheral walls of the bottomed outer cylinder and the inner cylinder. You may be comprised by the horizontal annular partition formed integrally with these.
[0013]
Further, in the first drain trap with the intake valve according to the present invention, in addition to the partition, a reverse flow of the drain to the intake valve is prevented in a portion between the drain overflow hole and the vent hole on the outer peripheral surface of the small diameter portion. More preferably, a check valve is provided.
[0014]
If there is a check valve as described above, it is possible to more reliably prevent the backflow of 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 portion of the outer peripheral surface of the small diameter portion so that the outer peripheral edge portion is in contact with the inner peripheral surface of the upper end portion of the drain pipe. Can do. When the flow rate of 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. When the drainage approaches the end and the momentum of the drainage flow becomes weaker, the check valve opens, the intake valve operates, and the outside air in the outer annular gap is below the check valve. Is introduced, and the negative pressure state of the portion is eliminated. Therefore, it is less likely to cause problems such as an unpleasant sound generated due to air being mixed into the wastewater due to the negative pressure suction action, or a wastewater flow becoming worse.
[0015]
  Next, the second drain trap with an intake valve according to the present invention is:A bottomed outer cylinder inserted into the upper end of the drain pipe connected to the floor drain, a lid that covers the upper end opening of the bottomed outer cylinder and has a through hole in the center, and communicates with the through hole An inner cylinder connected downward to the lid and a drainage hose connection port connected upward to the lid so as to communicate with the through-hole, and the inner cylinder is located below the bottom wall upper surface of the bottomed outer cylinder It has a length such that a void portion is generated, and has an outer diameter such that an inner annular void portion is formed between the inner peripheral surface of the peripheral wall of the bottomed outer cylinder, and the peripheral wall of the bottomed outer cylinder is The upper end portion is a large-diameter portion having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe, and the portion below the upper end portion is between the inner peripheral surface of the upper end portion of the drain pipe. It is a small diameter portion having an outer diameter such that an outer annular void portion is generated,Ventilation and drainage overflow holes are made in the upper part of the small diameter part.AndOn the lid,An air intake hole is formed to communicate the inner annular gap and the space above the floor,When the drain pipe is in a negative pressure stateOpen the air intake ventOutside air is introduced into the drainage pipe through the inner annular gap and ventilation / drainage overflow hole.When the negative pressure in the drain pipe is resolved, the intake hole is closedAn intake valve is provided.
[0016]
This second drainage trap with an intake valve also achieves substantially the same operational effects as the first drainage trap with an intake valve described above. In addition, it is preferable that the ventilation / drainage overflow hole is expanded upward as compared with the drainage overflow hole of the first drainage trap with the intake valve so that the function can be surely exhibited.
[0017]
  In the first and second drain traps with the intake valve according to the present invention, the intake valve is formed inside the lid.The intake hole is formed in the outer portion of the bottom wall so as to communicate with the space above the floor, and the communication hole is formed in the inner portion of the bottom wall so as to communicate with the inner gap.With annular valve chamber,An annular valve body that is arranged to be movable up and down in the valve chamber and has a size that can block the intake hole, and when the inside of the drain pipe is in a negative pressure state, the air pressure between the valve chamber communicating with the drain pipe and the space above the floor When the valve body rises from the bottom wall of the valve chamber due to the difference, outside air is introduced from the intake hole, and the negative pressure state in the drain pipe is eliminated, the valve body descends to the bottom wall of the valve chamber by its own weight, The air intake hole may be blocked.
[0018]
If the configuration of the intake valve is as described above, the structure is simple and the intake valve can be easily manufactured. In addition, the opening and closing operation of the valve is automatically and reliably performed by the pressure difference between the inside of the drain pipe and the space above the floor, and there is no fear of odor leakage to the space above the floor or the backflow of drainage.
[0019]
In the case where the intake valve has the above-described configuration, a plurality of inward convex portions that contact the inner peripheral wall of the valve chamber and guide the valve body to be raised and lowered are provided at intervals in the circumferential direction on the inner peripheral edge of the valve body. More preferably.
[0020]
If the inward convex portion as described above is provided on the valve body, the intake hole is reliably closed and opened by raising and lowering the valve body.
[0021]
In the first and second drainage traps with an intake valve according to the present invention, the inner cylinder may be formed integrally with the drainage hose connection port by a soft resin.
[0022]
In the above case, since the inner cylinder and the drainage hose connection port are integrated, the number of parts is reduced accordingly. Moreover, when connecting to the lid, it is only necessary to insert these integrals into the through-holes of the lid, and since the integral is made of a soft resin, the insertion part of the integral is the inner peripheral surface of the through-hole. The special seal member becomes unnecessary. Examples of the soft resin include elastomers and soft vinyl chloride resins.
[0023]
In the first and second drain traps with the intake valve according to the present invention, the inner cylinder may be integrally formed with the lid by a hard resin, and the drain hose connection port may be formed by a soft resin.
[0024]
In the above case, since the inner cylinder and the lid are integrally formed of the hard resin, the number of parts is reduced and the labor for connecting the inner cylinder to the lid can be saved. In addition, 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 and connecting it, the lower end portion is brought into close contact with the inner peripheral surface of the through hole, and a special sealing member is provided. It becomes unnecessary. Examples of the hard resin include ABS resin.
[0025]
Further, in the first and second drain traps with the intake valve according to the present invention, the inner cylinder and the drain hose connection port may be formed separately from each other by a soft resin.
[0026]
In the above case, for example, the upper end of the inner tube made of soft resin is inserted and connected to the through hole of the lid so that the lower end is in close contact with the inner peripheral surface of the through hole. By inserting and connecting the lower end portion of the connection port to the upper end portion of the inner cylinder, the lower end portion comes into close contact with the inner peripheral surface of the upper end portion of the inner cylinder, so that a special seal member is unnecessary.
[0027]
In the first and second drain traps with the intake valve according to the present invention, the bottomed outer cylinder can be joined to the inner peripheral surface of the upper end portion of the drain pipe having the smaller inner diameter out of the two kinds of drain pipes having different inner diameters. A bottomed outer cylinder main body having a large-diameter portion having an outer diameter at the upper end portion of the peripheral wall, and an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe having the larger inner diameter among the two types of drain pipes. And an annular adapter that is arbitrarily fitted and joined to the large-diameter portion of the bottomed outer cylinder main body, and is inserted into the upper end portion of the drain pipe having the smaller inner diameter. In the case where it is configured only by the outer cylinder main body and is inserted into the upper end portion of the drain pipe having the larger inner diameter, it may be configured by a bottomed outer cylinder main body and an adapter.
[0028]
In the above case, even when the drain pipe is composed of any one of, for example, a VU pipe (a pipe having a large inner diameter) and a VP pipe (a pipe having a small inner diameter), it can be easily handled only by using or not using an adapter. Can be convenient.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
  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 has a bottomed outer cylinder (2) inserted into the upper end of a drain pipe (P) connected to a floor drain port (D). A lid (3) that covers the top opening of the bottomed outer cylinder (2) and has a through hole (30) in the center, and is connected downward to the lid (3) so as to communicate with the through hole (30) And a drain hose connection port (5) connected upward to the lid (3) so as to communicate with the through hole (30). The inner cylinder (4) has a length such that a lower gap (S1) is formed between the bottom wall (21) and the upper surface of the bottom wall (21) of the bottomed outer cylinder (2), and the peripheral wall of the bottomed outer cylinder (2). (22) It has an outer diameter such that an inner annular gap (S2) is formed between the inner peripheral surface and the inner peripheral surface. The peripheral wall (22) of the bottomed outer cylinder (2)(P)A large diameter portion (221) having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the upper portion, and a portion below the upper end portion is a drain pipe(P)A small-diameter portion (222) having an outer diameter such that an outer annular gap portion (S3) is formed between the upper peripheral portion and the inner peripheral surface of the upper end portion, and a drainage overflow hole (23) and a drainage at the upper portion of the small-diameter portion (222) A vent hole (24) located above the overflow hole (23) is formed. And on the lid (3)Inner annular gap (S2) And the space above the floor (S) Intake hole that communicates with (62) Is formed,Drain pipe(P)When the inside is in a negative pressure stateAir intake hole (62) OpenOutside air (A) is introduced into the drain pipe (P) through the inner annular gap (S2) and vent hole (24).And drain pipe (P) When the negative pressure inside is eliminated (62) CloseAn intake valve (6) is provided.
[0030]
  The bottomed outer cylinder (2) has two types of drainage pipes with different inner diameters, that is, drainage pipes with large inner diameters consisting of VU pipes.(P)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 small inner diameter among drain pipes (not shown) made of VP pipe and having a small inner diameter is formed on the upper end portion of the peripheral wall (22). The bottomed outer cylinder main body (2A) and the drain pipe with the larger inner diameter of the two types of drain pipes(P)And an annular adapter (2B) that has an outer diameter that can be joined to the inner peripheral surface of the upper end portion and is arbitrarily fitted on the large-diameter portion (221A) of the bottomed outer cylinder body (2A) and joined. ing. And when it is inserted into the upper end of a drain pipe with a small inner diameter, it is composed only of a bottomed outer cylinder body (2A), and a drain pipe with a large inner diameter.(P)In the case of being inserted into the upper end portion, the bottomed outer cylinder main body (2A) and the adapter (2B) are configured. Therefore, in the latter case, the large diameter part (221) of the peripheral wall (22) of the bottomed outer cylinder (2) is composed of the large diameter part (221A) of the bottomed outer cylinder main body (2A) and the adapter (2B). Will be. 1 and 2, a drain pipe having a large inner diameter made of a VU pipe(P)A state in which the bottomed outer cylinder (2) is inserted is shown in FIG. The bottomed outer cylinder body (2A) and the adapter (2B) are formed of a hard resin such as an ABS resin. Joint of bottomed outer cylinder body (2A) and adapter (2B), bottomed outer cylinder body (2A) or adapter (2B) and drain pipe(P)The joining with the inner peripheral surface of the upper end portion is performed using, for example, an adhesive.
[0031]
An annular outward flange (25) is integrally formed at the upper end of the bottomed outer cylinder (2). This flange (25) is engaged with the inner peripheral edge of the upper surface of the floor ring outlet cover (7) in the form of a horizontal ring plate 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 outlet cover (7). A female thread portion (711) is formed on the inner peripheral surface of the rising wall (71).
[0032]
There are several drainage overflow holes (23) in total, each of which has a large horizontal rectangular shape, and is arranged at an interval in the circumferential direction near the upper end of the small diameter portion (222). There are also a plurality of vent holes (24) in total, each of which has a small horizontal rectangular shape, and is arranged at an upper end portion of the small diameter portion (222) at intervals in the circumferential direction.
[0033]
The inner cylinder (4) is integrally formed with the drain hose connection port (5) by a soft resin such as an elastomer. The integrated body of the inner cylinder (4) and the drainage hose connection port (5) is connected to the lid (3) by being inserted into the through hole (30) of the lid (3). The hole insertion portion of the integrated object is in close contact with the inner peripheral surface of the through hole (30).
[0034]
The drain hose connection port (5) is bent in an L shape with its upper end side facing sideways. The upper end portion (51) of the drain hose connection port (5) extends slightly outward so that the tip of the drain hose (H) of a washing machine or the like can be easily inserted. Further, on the outside of the upper end portion of the drain hose connection port (5), a hose fastener (52) for fastening and fixing the distal end portion of the drain hose (H) inserted into the upper end portion (51) is provided. .
[0035]
The inner annular gap (S2) is partitioned by the horizontal annular partition (8) into a drainage circulation part (S21) leading to the drainage overflow hole (23) and an outside air circulation part (S22) leading to the vent hole (24). ing. The partition (8) includes a portion of the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface of the small diameter portion (222) of the bottomed outer cylinder (2), and an inner cylinder ( 4) It is comprised by the horizontal annular partition member (8) interposed between outer peripheral surface parts. The inner peripheral surface of the partition member (8) is in close contact with the outer peripheral surface of the soft resin inner cylinder (4). On the outer peripheral surface of the partition member (8), a seal that can come into close contact with the portion between the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface of the small diameter portion (222) of the bottomed outer cylinder (2) A member (81) is attached. The seal member (81) is configured by, for example, an O-ring.
[0036]
  A check valve (9) that prevents backflow of drainage (W) to the intake valve (6) is provided in the portion between the drainage overflow hole (23) and the vent hole (24) on the outer peripheral surface of the small diameter portion (222). Is provided. The check valve (9) is made of an elastic material such as rubber, and the outer peripheral edge (91) is a drain pipe.(P)The small diameter portion (222) has a skirt shape attached to the portion of the outer peripheral surface so as to be in contact with the inner peripheral surface of the upper end portion.
[0037]
The lid (3) is constituted by a lower lid member (3A) and an upper lid member (3B).
[0038]
The lower lid member (3A) includes an inner peripheral wall (31) constituting a through hole (30), a bottom wall (32) extending outward from a lower end of the inner peripheral wall (31), and a bottom wall (32). A hanging wall (33) extending downward from the center of the width and having a lower end received by the upper end surface of the bottomed outer cylinder (2) via an annular seal member (10). A male threaded portion (331) is formed on the outer peripheral surface of the hanging wall (33), and this male threaded portion (331) is screwed into the female threaded portion (711) of the rising wall (71) of the floor drain port cover (7). . Accordingly, the lower lid member (3A) is connected and integrated with the floor drain port cover (7). The bottom wall (32) of the lower lid member (3A) is formed as an inclined wall portion (321) in which a portion inside the hanging wall (33) extends obliquely downward toward the inside, from the hanging wall (33). The outer portion is also a horizontal wall portion (322). The horizontal wall portion (322) projects outward from the rising wall (71) of the floor drain port cover (7).
[0039]
On the other hand, the upper lid member (3B) has a top wall (34) whose inner peripheral edge is received by the upper end of the inner peripheral wall (31) of the lower lid member (3A), and an inner peripheral wall (31) of the lower lid member (3A). ) An inner hanging wall (35) extending downward from the inner peripheral edge of the top wall (34) so as to overlap the outer surface, and an outer hanging wall (36) extending downward from the outer peripheral edge of the top wall (34). Yes. An annular groove (361) is formed at the center of the inner peripheral surface of the outer hanging wall (36). The outer peripheral edge of the bottom wall (32) of the lower lid member (3A) is fitted into the annular groove (361). Thus, the upper lid member (3B) is connected and integrated with the lower lid member (3A).
[0040]
  The intake valve (6) is formed inside the lid (3)., Bottom wall (611) The space above the floor in the outer part of (S) Leading to the intake hole (62) Opened and bottom wall (611) Inner void in the inner part of (S2) Communication hole to communicate with (63) Has been openedWith annular valve chamber (61),An annular valve body (64) having a size that can be moved up and down in the valve chamber (61) and can close the intake hole (62) is provided. And drain pipe(P)When the inside becomes negative pressure, drain pipe(P)The valve element (64) rises from the bottom wall (611) of the valve chamber (61) due to the pressure difference between the valve chamber (61) communicating with the interior and the space above the floor (S). (A) was introduced, drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) by its own weight, and the intake hole (62) is blocked.
[0041]
The annular valve chamber (61) includes an inner peripheral wall (31) and a bottom wall (32) of the lower lid member (3A), a top wall (34), an inner hanging wall (35) and an outer side of the upper lid member (3B). It is formed by the upper half part of the drooping wall (36).
[0042]
There are a plurality of intake holes (62) in total, each having a substantially rectangular shape when viewed from the plane, and the outer portion of the bottom wall (611) of the valve chamber (61), that is, the lower lid member (3A) Are provided in the horizontal wall portion (322) of the bottom wall (32) at intervals in the circumferential direction.
[0043]
There are also a plurality of communication holes (63) in total, each of which has a substantially rectangular shape when viewed from the plane, and is formed in the inner part of the bottom wall (611) of the valve chamber (61), that is, in the lower lid member (3A). The inclined wall portion (321) of the bottom wall (32) is provided with an interval in the circumferential direction.
[0044]
The valve body (64) is, for example, an annular plate formed of rubber or the like generally used as a packing material. The valve body (64) is brought into contact with the inner peripheral edge of the valve chamber (61) with the inner peripheral wall (612) of the valve chamber (61) (the inner hanging wall (35) of the upper lid member (3B)) to guide the valve body (64) to move up and down. A plurality of inward convex portions (641) are provided at intervals in the circumferential direction.
[0045]
Next, the function of the drain trap (11) with the intake valve (6) will be described with reference to FIGS.
[0046]
  First, when draining from a washing machine or the like, as shown in FIG. 1, drainage (W) flows into the inner cylinder (4) from the drainage hose connection port (5) via the drainage hose (H). The drainage pipe including the outer annular gap (S3) from the drainage overflow hole (23) through the drainage flow part (S21) of the lower gap (S1) and the inner annular gap (S2)(P)It flows down inside.
[0047]
Here, in a state where the flow rate of the waste water (W) is large and the momentum of the flow is strong, as shown by a broken line in FIG. 1, the check valve ( The outer peripheral edge (91) of 9) is pressed against the inner peripheral surface of the upper end of the drain pipe (P), and the check valve (9) is closed. Thereby, the backflow of the waste water (W) to the intake valve (6) is reliably prevented. Further, in this state, the drainage (W) flows in a state where the drainage (W) is almost full in the lower part of the outer annular gap (S3) than the check valve (9), but this part is partially in a negative pressure state. It can be. However, in this state, since almost no air enters the drain trap (11) from the drain hose (H), there is no problem of generation of unpleasant noise or deterioration of the flow condition.
[0048]
When the flow rate of the waste water (W) decreases and the momentum of the flow decreases, the check valve (9) opens as shown by the solid line in FIG. When the outer annular gap (S3) is in a negative pressure state in this state, the valve element (64) is caused by the pressure difference between the valve chamber (61) communicating with the outer annular gap (S3) and the space above the floor (S). Ascending from the bottom wall (611) of the valve chamber (61), outside air (A) is introduced into the valve chamber (61) from the intake hole (62). The introduced outside air (A) is introduced into the outer annular gap (S3) through the communication hole (63), the outside air circulation part (S22) of the inner annular gap (S2), and the vent hole (24). This eliminates the negative pressure state of the outer annular gap (S3). Therefore, there is no possibility that unpleasant noise will be generated due to the mixing of air into the waste water (W) due to the negative pressure suction action, and the flow of the waste water will be deteriorated.
[0049]
  Drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) by its own weight as shown in FIG. 2, thereby closing the intake hole (62). Can be removed. When the drainage from the washing machine or the like is completely finished, the drainage collects at a level lower than the drainage overflow hole (23) inside the bottomed outer cylinder (2) and the inner cylinder (4), thereby sealing water ( W1) is formed. With this sealed water (W1), the drain pipe(P)The odor and pest inside are prevented from leaking into the space above the floor (S). In this state, since the intake valve (6) is also closed, no odor or pest leakage from the intake valve (6) occurs.
[0050]
  Also, as shown in Fig. 2, when the sealed water (W1) is formed in the drain trap (11), when the drainage flows in the other drain pipe in a full state and the induction siphon action occurs, the outer ring Drain pipe including void (S3)(P)The entire inside is in a negative pressure state. In this case as well, the intake valve (6) opens and the drain pipe(P)Outside air (A) is introduced inside. This makes the drain pipe(P)The negative pressure state inside is eliminated. In particular, in the case of the drain trap (11) with the intake valve (6) according to the present invention, the position of the other drain pipe where the drainage flows in a full state is a drain pipe connected to the drain side branch pipe on the upper floor. Other drainage pipes with drain traps (11)(P)Even when the drainage pipe is connected to the upstream side of the drainage horizontal branch pipe connected to the(P)It is excellent in that the negative pressure state is eliminated.
[0051]
FIG. 4 shows a second embodiment of the present invention. In FIG. 4, the inner cylinder (4) of the drain trap (12) with the intake valve (6) is integrally formed with the lid (3) by a hard resin such as ABS resin. The drain hose connection port (5) is formed of a soft resin such as an elastomer. The inner cylinder (4A) is provided in a hanging shape so as to continue to the lower end of the inner peripheral wall (31) of the lower lid member (3A). The drain hose connection port (5) has its drooping lower end (53) inserted into the through hole (30) of the lid (3) and the upper end of the inner cylinder (4), so that the lid (3) faces upward. It is connected. The lower end (53) of the drain 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 at the uppermost portion of the lower end (53) of the drain 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 substantially the same as those of the first embodiment.
[0052]
FIG. 5 shows a third embodiment of the present invention. In FIG. 5, the inner cylinder (4) and the drainage hose connection port (5) of the drain trap (13) with the intake valve (6) are formed separately by a soft resin such as an elastomer. The upper end (41) of the inner cylinder (4) is connected downward to the lid (3) by being inserted 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 drainage hose connection port (5) has its drooping lower end (53) inserted into the upper end (41) of the inner cylinder (4) so that it faces upward to the lid (3) via the upper end (41). It is connected to the. The lower end (53) of the drain hose connection port (5) is in close contact with the inner peripheral surface of the upper end (41) of the inner cylinder (4). Other configurations and functions are substantially the same as those of the first embodiment.
[0053]
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 in the upper part of the small diameter portion (222) in the peripheral wall (22) of the bottomed outer cylinder (2). Instead, a ventilation / drainage overflow hole (26) is provided instead. There are several ventilation / drainage overflow holes (26) in total, each of which has a rectangular shape that is further expanded upward compared to the drainage overflow holes (23) of FIGS. Is arranged at intervals in the circumferential direction. Further, in the drain trap (14) with the intake valve (6) of FIG. 6, an annular partition and a check valve are not provided. The other configuration is almost the same as that of the first embodiment.
[0054]
  In the drain trap (14) with the intake valve (6) in FIG. 6, when draining from a washing machine or the like is performed, drainage (W) is drained from the drainage hose connection port (5) via the drainage hose (H). A drainage pipe that flows into the inner cylinder (4), passes through the lower gap (S1) and the inner annular gap (S2), and includes the outer annular gap (S3) from the vent / drainage overflow hole (26).(P)It flows down inside. At this time, the outer annular gap (S3) is partially in a negative pressure state, and the valve body (64) is lifted from the bottom wall (611) of the valve chamber (61) and the outside air from the intake hole (62). (A) is introduced. The introduced outside air (A) is introduced into the outer annular gap (S3) through the communication hole (63), the inner annular gap (S2), and the ventilation / drainage overflow hole (26). This eliminates the negative pressure state of the outer annular gap (S3). Therefore, even if drainage approaches the end and the momentum of the flow of drainage (W) becomes weak, unpleasant noise may be generated due to air mixing into the drainage (W) due to negative pressure suction action, or the drainage (W) There is no fear that the flow will deteriorate. Drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends by its own weight and closes the intake hole (62).
[0055]
  Although illustration is omitted, when drainage from the washing machine or the like is completely finished, drainage is accumulated at a lower level than the ventilation / drainage overflow hole (26) inside the bottomed outer cylinder (2) and inner cylinder (4). , Thereby forming a sealed water. In this sealed state, the drainage pipe including the outer annular gap (S3) by induction siphon action(P)Even when the entire interior is in a negative pressure state, the intake valve (6) opens in the same manner as above, and the drain pipe(P)Outside air (A) is introduced inside. This makes the drain pipe(P)The negative pressure state inside is eliminated, and destruction of the sealed water is prevented.
[0056]
It should be noted that the above embodiment is merely an example, and it is of course possible to implement the present invention with appropriate modifications without departing from the scope of the present invention described in the claims.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 2 is a vertical longitudinal sectional view of a drain trap with an intake valve in a sealed state in which drainage does not flow, showing the first embodiment of the present invention.
3 is an exploded perspective view of the drain trap with an intake valve of FIGS. 1 and 2 in an exploded manner.
FIG. 4 shows a second embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 5 shows a third embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 6 shows a fourth embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a 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): Perimeter wall
(221) (221A): Large diameter part
(222): Small diameter part
(23): Drainage overflow hole
(24): Ventilation hole
(3): Lid
(30): Through hole
(4): Inner cylinder
(5): Drain hose connection port
(6): Intake valve
(61): Valve chamber
(611): Bottom wall (of the valve chamber)
(62): Air intake hole
(63): Communication hole
(64) ： Valve
(641): Inward convex
(8): Horizontal annular partition
(9): Check valve

Claims (10)

A bottomed outer cylinder (2) inserted into the upper end of the drain pipe (P) connected to the floor drainage port (D), and a through hole ( 30) with a lid (3), an inner cylinder (4) connected downward to the lid (3) so as to communicate with the through hole (30), and a lid (3) so as to communicate with the through hole (30). ) And a drainage hose connection port (5) connected upward,
The inner cylinder (4) has such a length that a lower gap (S1) is formed between the bottom wall (21) and the upper surface of the bottom wall (21) of the bottomed outer cylinder (2). It has an outer diameter such that an inner annular gap (S2) occurs between the peripheral wall (22) and the inner peripheral surface,
The peripheral wall (22) of the bottomed outer cylinder (2) has a large-diameter portion (221) having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe (P), The portion below the upper end is a small diameter portion (222) having an outer diameter such that an outer annular void (S3) is formed between the inner peripheral surface of the upper end of the drain pipe (P), and the small diameter portion ( 222), a drainage overflow hole (23) and a vent hole (24) located above the drainage overflow hole (23) are opened,
The lid (3) has an intake hole (62) that allows the inner annular gap (S2) and the space above the floor (S) to communicate with each other, and when the inside of the drain pipe (P) is in a negative pressure state. Opening the intake hole (62) and introducing outside air (A) into the drain pipe (P) through the inner annular gap (S2) and vent hole (24) eliminates the negative pressure state in the drain pipe (P) . A drain trap with an intake valve, which is provided with an intake valve (6 ) that closes the intake hole (62) .   The inner annular gap (S2) is partitioned by the horizontal annular partition (8) into a drainage circulation part (S21) leading to the drainage overflow hole (23) and an outside air circulation part (S22) leading to the vent hole (24). The drainage trap with an intake valve according to claim 1.   A check valve (9) that prevents the backflow of drainage (W) to the intake valve (6) at the portion between the drainage overflow hole (23) and the vent hole (24) on the outer peripheral surface of the small diameter portion (222) The drainage trap with an intake valve according to claim 2, wherein It bottomed outer cylinder which is inserted into the upper end portion of the floor drain port (D) connected to the drainage pipe (P) and (2), covering the top opening of the bottomed outer cylinder (2) and the central portion in the through hole ( a lid 30) is opened (3), a tubular (4) among connected downwards to the lid (3) so as to communicate the through hole (30), the lid so as to communicate the through hole (30) (3 ) And a drainage hose connection port (5) connected upward ,
The inner cylinder (4), which has a length such lower air gap (S1) is formed between the bottom wall (21) the upper surface of the bottom outer cylinder (2), a bottomed outer cylinder (2) It has an outer diameter such that an inner annular gap (S2) occurs between the peripheral wall (22) and the inner peripheral surface ,
The peripheral wall (22) of the bottomed outer cylinder (2) has a large-diameter portion (221) having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe (P) , The portion below the upper end is a small diameter portion (222) having an outer diameter such that an outer annular void (S3) is formed between the inner peripheral surface of the upper end of the drain pipe (P) , and the small diameter portion ( At the top of 222) there is a vent and drainage overflow hole (26) ,
The lid (3) has an intake hole (62) that allows the inner annular gap (S2) and the space above the floor (S) to communicate with each other, and when the inside of the drain pipe (P) is in a negative pressure state. Open air intake hole (62) and introduce outside air (A) into drain pipe (P) through inner annular gap (S2) and vent / drain overflow hole (26 ) , and negative pressure in drain pipe (P) A drain trap with an intake valve, which is provided with an intake valve (6) that closes the intake hole (62) when the problem is resolved . An intake valve (6) is formed inside the lid (3), the intake hole (62) is opened in the outer portion of the bottom wall (611) so as to communicate with the space above the floor (S) , and the bottom wall ( 611) an annular valve chamber (61) in which a communication hole ( 63) is opened so as to communicate with the inner gap (S2) in the inner portion, and the valve chamber (61) is arranged to be movable up and down and an intake hole ( 62) and an annular valve body (64) having a size capable of closing
When the inside of the drain pipe (P) is in a negative pressure state, the valve body (64) is moved to the valve chamber (61) by the pressure difference between the valve chamber (61) communicating with the drain pipe (P) and the space above the floor (S). Ascending from the bottom wall (611) of the air, outside air (A) is introduced from the intake hole (62),
When the negative pressure in the drain pipe (P) is resolved, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) due to its own weight, and the intake hole (62) is blocked. The drainage trap with an intake valve according to any one of claims 1 to 4.   A plurality of inwardly convex portions (641) that contact the inner peripheral wall (612) of the valve chamber (61) and guide the raising and lowering of the valve body (64) at the inner peripheral edge of the valve body (64) are spaced apart in the circumferential direction. The drainage trap with an intake valve according to claim 5, wherein the drainage trap is provided.   The drain trap with an intake valve according to any one of claims 1 to 6, wherein the inner cylinder (4) is integrally formed with the drain hose connection port (5) by a soft resin.   The intake valve according to any one of claims 1 to 6, wherein the inner cylinder (4) is formed integrally with the lid (3) by a hard resin, and the drain hose connection port (5) is formed by a soft resin. With drain trap.   The drainage trap with an intake valve according to any one of claims 1 to 6, wherein the inner cylinder (4) and the drainage hose connection port (5) are each formed separately from a soft resin.   The bottomed outer cylinder (2) has a large-diameter part (221A) with an outer diameter that can be joined to the inner peripheral surface of the upper end of the drain pipe with the smaller inner diameter of two types of drain pipes with different inner diameters. The bottomed outer cylinder body (2A) provided in the section and the outer diameter that can be joined to the inner peripheral surface of the upper end of the drain pipe (P) having the larger inner diameter among the two types of drain pipes When it is inserted into the upper end of the drain pipe with the smaller inner diameter, it has an annular adapter (2B) that is arbitrarily fitted on the large diameter part (221A) of the bottom outer cylinder body (2A) and joined. Consists of only the bottomed outer cylinder body (2A), and when inserted into the upper end of the drain pipe (P) with the larger inner diameter, the bottomed outer cylinder body (2A) and the adapter (2B) The drainage trap with an intake valve according to any one of claims 1 to 9, wherein

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