JP2010031594A - Ventilating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilating device capable of ventilating the inside of a lid body covering a combined inlet or the like, exerting excellent ventilating and checking functions while minimizing the whole device, preventing a ventilating part from coming into contact with a liquid, preventing foreign matters, insects, etc. from entering the ventilating part, and maintaining the ventilating and checking functions over a long time while assuring ventilation performance. <P>SOLUTION: In the ventilating device, the container-like covering lid body 3 includes an outflow port 10 and a plurality of inflow ports 11. A confirmation opening part 14 arranged in the covering lid body 3 is detachably covered with a ventilating lid body 4. A sealing body 5 having a check valve mechanism 17, or the check valve mechanism 17 and a ventilating valve mechanism 18 is housed in the ventilating lid body 4. The outside air is allowed to flow in with the sealing body 5, so that the state of negative pressure inside the covering lid body 3 may be released, while the closed state is maintained at normal times. The ventilating device has an adaptor 6 at a lower position of the sealing body 5. The adaptor 6 has a shielding part 50 protecting the check valve mechanism 17, and a ventilating part 51 having the ventilating function. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a venting device, which is attached to a drainage facility such as a confluence or drainage or a drainage header. The present invention relates to a venting device suitable for a built-in lid type for merging and draining.

  Conventionally, a drainage system has been proposed in which a plurality of drainage pipes are aggregated using a confluence (drainage) inside the floor and flowed downstream. This drainage system is being widely used because it has a merit that the living space can be widened by making the piping space compact and construction is easy. In the case of providing a drainage system, it is important to reliably reduce the negative pressure generated in the pipe during drainage in order to allow smooth drainage.

  As a drainage system of this type, for example, a residential drainage system disclosed in Patent Document 1 is known. In the drainage system, a header to which a plurality of drainage branch pipes are connected is arranged under the floor, and a drainage basin is connected to the outflow side of the header via a drainage main pipe. This drainage drain system is provided with a vent valve for preventing the trap from being broken when negative pressure is generated.

  Further, Patent Document 2 is an underfloor piping facility for drainage that uses an aggregate outlet having an outlet connected to one drainage main pipe and an inlet connected to a plurality of drainage branch pipes. This piping facility omits a part of the instrument trap on the upstream side of the drainage branch pipe so that the drainage branch pipe is also used as a ventilation pipe.

  On the other hand, Patent Document 3 discloses an indoor underfloor pipe using a drainage basin. In this underfloor piping, the drainage basin is provided with an intake valve exposed on the upper surface of the lid, and outside air is sucked into the piping through the intake valve.

  In the literatures 1 and 2, the ventilation portion is provided outside the drainage basin, and a large piping space is required to secure a predetermined amount of ventilation. Further, when a strong pressure is applied, the ventilation portion may be damaged. On the other hand, the document 3 is not only contrary to compactness because the intake valve is exposed to the outside of the lid, but also the intake valve may be damaged by contact with the outside or malfunction due to moisture or dust under the floor. There is. In addition, this intake valve is inconvenient to transport and store, and it has been difficult to eliminate the negative pressure in the drainage basin when the capacity is reduced.

On the other hand, the present inventor has proposed a ventilation device with a built-in ventilation lid in Patent Document 4. In this vent lid built-in type ventilator, a vent lid body is detachably covered on a container-like lid body having an outlet and an inlet, and a vent seal is mounted in the vent lid. The body has a vent valve mechanism or a check valve mechanism.
The venting device releases the negative pressure state in the covered body by the vent valve mechanism or the check valve mechanism when the pressure in the covered body becomes negative, and is normally in the vent valve mechanism or the check valve mechanism. By this, the closed state is maintained. The inventor of the present invention enables the ventilation in the covered body such as merging while demonstrating excellent ventilation and non-return function while making the entire device compact by proposing the ventilation device. The problem is solved.

JP 2002-61247 A JP 2003-138621 A JP 2001-40745 A Japanese Patent Application No. 2007-301096

  As described above, the drainage systems of Patent Documents 1 and 2 have a risk of requiring a large piping space or damaging the ventilation part during drainage. In addition, Patent Document 3 has problems such as difficulty in making it compact and being easily damaged.

On the other hand, Patent Document 4 solves the problems that occur in Documents 1 to 3, but the following phenomenon may newly occur, and thus it is necessary to solve this problem.
That is, in order to further improve the drainage efficiency of the merged basin in the literature 4, it is conceivable to provide a partition plate that prevents the merged drainage from colliding directly. In the case where the partition plate is provided, it is necessary to open a vent hole for allowing air to flow in from the vent lid at the central portion of the partition plate.
However, when a vent is provided, this vent and the check valve mechanism built into the vent lid are directly connected, so that the splashing water generated when the drainage merges, the foreign matter jumping out of the drainage, In addition, water droplets or the like due to steam from the drainage may adhere to the valve body or valve seat of the check valve mechanism. If the adhesion of water or foreign matter becomes excessive, the check valve mechanism will not operate normally when a negative pressure (e.g., 20-50 Pa) is generated, and odor leakage, backflow leakage, and poor ventilation may occur. There is sex.

In addition, the check valve mechanism has a structure in which the valve body is urged upward by a spring and is seated on the valve seat, so that the valve body is more susceptible to water and foreign matter than the structure in which the valve body is seated on the valve seat by its own weight. It is easy to be adversely affected.
The above phenomenon occurs in the same manner for the check valve mechanism even when the check valve mechanism and the vent valve mechanism are provided.

  In addition, since this ventilator has a structure in which the air flowing in from the vent lid is once diffused within the merger, if a partition plate is provided, the efficiency of the air flowing to the central vent may deteriorate. There is. For this reason, it is necessary to further increase the efficiency of air flow during drainage.

  Furthermore, when two or more venting devices are connected under the floor, when the venting device on one side is drained, the backflow air opposite to the normal flow is generated from the venting device side on the other side. It becomes easy to flow. This air may cause insects such as worms to enter the ventilation device side from the drainage side, and if this pest rises in the ventilation device and adheres to the valve body of the ventilation valve mechanism, it may interfere with the valve function. .

  The present invention has been developed in view of the above-mentioned problems, and the object of the present invention is to allow ventilation in the covered body such as a confluence, and to achieve excellent ventilation and reverse while reducing the overall size. A venting device that can exert a stopping function, and while maintaining the ventilation performance, it can prevent the ventilation part from coming into contact with the liquid or preventing foreign matter or insects from entering the ventilation part. An object of the present invention is to provide a ventilation device capable of maintaining the above.

  In order to achieve the above object, according to the first aspect of the present invention, an outlet and a plurality of inlets are provided in a container-shaped cover body, and a confirmation opening provided in the cover body is attached and detached with a ventilation cover body. The vent cover is built with a non-return valve mechanism or a sealing body having a check valve mechanism and a vent valve mechanism, and outside air is allowed to flow through the seal body to create a negative pressure state in the cover body. In the venting device in which the closed state is normally maintained, an adapter is disposed below the sealing body. The adapter includes a shielding part for protecting the check valve mechanism and a venting part having a venting function. It is a ventilation apparatus which has.

  According to a second aspect of the present invention, the adapter is a ventilation device built in the ventilation lid at a position below the sealing body.

  According to a third aspect of the present invention, the adapter is formed in a circular shape, and an attachment portion is provided on the outer peripheral side of the adapter. The attachment portion is attached to a finger hook portion formed on the outer periphery of the sealing body, and the adapter is attached to the ventilation lid. Is a built-in ventilation device.

  The invention according to claim 4 is a ventilation device in which a drain hole is provided at the center of the substantially shield-shaped shielding portion, and the bottom surface side of the flange-shaped shielding portion is a guide surface for guiding external air.

  In the invention according to claim 5, the ventilation part is a radial lattice formed around the shielding part or a ventilation gap formed between the plurality of ribs, and air is communicated through the ventilation gap. This is a ventilating device.

  According to a sixth aspect of the present invention, there is provided a ventilating device in which a tapered surface or a circular arc surface-shaped channel guide for guiding the air flow is formed on the outer peripheral side of the air vent of the adapter.

  The invention according to claim 7 is a ventilation device in which a protrusion is provided on the upper surface side of the adapter and the adapter is prevented from being erroneously attached by this protrusion.

  According to the first aspect of the present invention, the aerating device can perform the ventilation and the non-return function while ensuring the ventilation of the inside of the covered body such as the merging masu and the like, and ensuring the ventilation performance. On the other hand, the ventilation device can prevent the foreign matter and insects from coming into contact with the ventilation portion and entering the ventilation portion, and can maintain the ventilation and non-return functions for a long time.

  According to the second aspect of the present invention, the shielding function and the ventilation function are efficiently exhibited by incorporating the adapter at a predetermined position of the sealing body, and the adapter is attached to the lid body with the ventilation lid. It is a ventilator that can be attached and detached as a single unit, and is easy to repair and maintain.

  According to the invention of claim 3, since the adapter can be easily attached to and detached from the lower side from the lower side, not only the repair and maintenance of the adapter is simplified, but also the ventilation that can easily perform the repair of the sealed body. Device. After the adapter is attached, the adapter is prevented from falling off, and the ventilation device can stably perform the shielding function by the shielding portion and the ventilation function by the ventilation portion.

  According to the invention of claim 4, the ventilation function is improved by allowing the air from the check valve mechanism to flow along the guide surface while efficiently shielding the water, foreign matter, insects, etc. Moreover, it is a ventilation apparatus which can maintain this ventilation function because condensed water can be discharged | emitted from a drain hole.

  According to the fifth aspect of the present invention, it is possible to sufficiently ensure the air permeability to the lid body side. In particular, when the ventilation portion is a ventilation gap formed between radial grids, the invasion of pests such as worms It is a venting device that prevents the pests from adhering to the valve body.

  According to the invention of claim 6, the air passing through the ventilation part is guided to be concentrated on the center side of the guide surface of the shielding part, and the air is prevented from diffusing in the covered body to improve the ventilation performance. It is a ventilation device that can.

  According to the invention which concerns on Claim 7, it is a ventilation apparatus which can mount | wear with an adapter with an exact attachment state with respect to a sealing body, and can always operate a ventilation valve mechanism normally.

Hereinafter, preferred embodiments of the venting device according to the present invention will be described in detail with reference to the drawings.
In FIG. 1, a ventilator main body 1 of the present invention is used as a part of a drainage system 2 disposed on the lower side of a floor G, for example, and includes a lid body 3, a vent lid body 4, and a sealing body 5. And have. An adapter 6 is disposed below the sealing body 5.

The cover 3 is, for example, a drainage confluence, has a container shape, and has an outlet 10 and a plurality of inlets 11. An inflow pipe 12 such as a plurality of drainage branch pipes flowing from drainage equipment such as a primary toilet or a washroom (not shown) is connected to the inflow port 11. Further, a drain pipe 13 for drainage is connected to the outlet 10. As a result, the lid body 3 collects the primary side drainage via the inflow pipe 12 and allows this drainage to flow from the secondary side drainage pipe 13.
In addition, a confirmation opening (inspection port) 14 for confirming the inside is formed in the upper part of the lid 3, and this confirmation opening 14 is normally covered by the ventilation lid 4.

  A notch step portion 3 a is formed on the inner peripheral side of the cover body 3, and an edge portion 7 a is latched and fixed to the notch step portion 3 a and a partition plate 7 is disposed inside the cover body 3. Yes. A vent hole 7b is provided in the central portion of the partition plate 7, and air flows into the lid body 3 from the vent lid body 4 through the vent hole 7b. Moreover, the partition part 7c is provided so that the vent hole 7b may be enclosed, and each inflow port 11 is divided by this partition part 7c, and it is prevented that the waste_water | drain which merges collides directly.

The ventilation lid body 4 shown in FIG. 2 is provided to ventilate the outside air (air) into the lid body 3, and in order to make the ventilation device main body 1 compact, the height direction dimension is particularly short. Has been miniaturized. A bulging chamber 15 is formed inside the vent lid body 4, and the sealing body 5 is built into the bulging chamber 15 so as to be fitted.
The ventilation lid 4 is detachably attached to the confirmation opening 14, and when the ventilation lid 4 is removed from the confirmation opening 14, maintenance and cleaning of the lid 3 can be performed. . In addition, in this embodiment, although the ventilation | gas_flowing cover body 4 is a cover part of the confluence | merging for drainage, it is not limited to this.

As shown in FIGS. 2 to 5, the sealing body 5 is provided in a substantially cylindrical shape that can be fitted inside the ventilation lid body 4. The base 16 constituting the sealing body 5 is made of, for example, ABS or other resin, and a check valve mechanism 17 and a vent valve mechanism 18 are provided on the upper side of the base 16. A ventilation chamber 19 serving as a ventilation channel is formed in the vicinity. In the present embodiment, the check valve mechanism 17 and the vent valve mechanism 18 are provided, but only the check valve mechanism may be provided.
The check valve mechanism 17 and the vent valve mechanism 18 are provided at a position in the sealing body 5 that communicates with an airtight chamber 20 to be described later. The check valve mechanism 18 and the vent valve mechanism 18 allow The generated negative pressure is reduced.

The check valve mechanism 17 includes a valve body 21, a valve shaft 22, a stopper 23, a stop member 24, and a spring 25.
The valve body 21 is formed in a disc shape made of rubber such as EPDM, and is attached so as to be sandwiched between the valve shaft 22 and the stopper 23. The valve shaft 22 is made of a resin such as ABS, and has a shaft portion 22a and a disk-shaped enlarged diameter portion 22b. The shaft portion 22a has a shape that can be inserted into a later-described valve shaft guide 26, and a groove portion 22c for attaching the stopper member 24 is formed on the distal end side of the shaft portion 22a. The stopper 23 is made of a resin such as ABS, and a fitting hole 23a into which the shaft portion 22a is fitted is provided at the center position. Further, the stopper member 24 is formed in a disk shape by a resin such as ABS, and an attachment hole 24a is formed at the center position.

  On the other hand, in the base 16, the check valve mechanism 17 is formed at a position where an annular inlet 27 into which air flows and an annular valve seat on which a valve body 21 can be seated on the secondary side of the inlet 27. 28, and the inlet 27 is provided with a rib body 29 and a valve shaft guide 26 at a substantially central portion via the rib body 29.

  In order to incorporate the check valve mechanism 17 into the base 16, first, the stopper 23 is fitted and fixed to the shaft portion 22 a with the valve body 21 mounted on the valve shaft 22. Subsequently, the valve shaft 22 is inserted into the valve shaft guide 26, and the groove portion 22c is formed in the mounting hole 24a of the stopper member 24 in a state where the spring 25 is mounted on the outer peripheral side of the shaft portion 22a from the other side of the valve shaft guide 26. Fit it. As a result, the valve body 21, the stopper 23, and the valve shaft 22 are incorporated into the base 16 to constitute the check valve mechanism 17.

On the other hand, as shown in FIGS. 2 to 5, the vent valve mechanism 18 includes a valve body 31, a valve shaft 32, and a stopper 33.
The valve body 31 is formed in a disc shape made of rubber such as EPDM, and is attached by being sandwiched between the valve shaft 32 and the stopper 33. The valve shaft 32 is made of a resin such as ABS, and has a shaft portion 32a and a disk-shaped enlarged diameter portion 32b. The shaft portion 32 a has a shape that can be inserted into a later-described valve shaft guide 34.

  The shaft portion 32a has a substantially cross-shaped cross section on the front side. When the shaft portion 32a is inserted into the valve shaft guide 34, a gap (not shown) is formed between the shaft portion 32a and the valve shaft guide 34. Drain and air flow in the gap. Further, the cross-sectional shape of the shaft portion 32a may be other than a substantially cross-shaped cross section, and may be any cross-sectional shape as long as a gap can be provided between the shaft portion 32a and the valve shaft guide 34. The stopper 33 is made of a resin such as ABS, and a fitting hole 33a into which the shaft portion 32a is fitted is provided at the center position.

  In the base 16, the vent valve mechanism 18 is formed at a position where an annular inlet 35 into which external air flows and an annular valve seat on which a valve body 31 can be seated on the secondary side of the inlet 35. 36, and the inlet 35 is provided with a rib body 37 and a valve shaft guide 34 at a substantially central portion via the rib body 37. The valve shaft guide 34 is provided integrally with a reinforcing rib 38 described later.

  The valve shaft guide 34 is provided on the inner peripheral side so that the shaft portion 32a can be inserted, and the bottom plate portion 39 located below the valve shaft guide 34 and the valve shaft guide 34 cross each other at a through hole 40. The through hole 40 communicates the inside of the valve shaft guide 34 with the ventilation chamber 19. This structure prevents moisture, air, etc. from entering the valve shaft guide 34 and enclosing it, particularly when the ventilator main body 1 is installed in a place such as under the floor with high humidity. However, the valve body 31 operates smoothly and the ventilation function by the ventilation valve mechanism 18 is reliably exhibited.

  When the ventilation valve mechanism 18 is incorporated in the base 16, the stopper 33 is fitted into the shaft portion 32 a in the state where the valve body 31 is mounted on the valve shaft 32. Thereby, the vent valve mechanism 18 is disposed between the vent chamber 19 and the hermetic chamber 20 communicating with the vent chamber 19. After assembling the ventilation valve mechanism 18, it is possible to confirm whether or not it is in an appropriate assembled state by visually recognizing the lower end of the shaft portion 32 a from the through hole 40.

The ventilation chamber 19 communicates with an air inlet 7 that is opened in the circumferential direction of the ventilation lid 4, and outside air flows into the sealed body 5 through the air inlet 7.
A reinforcing rib 38 is formed integrally with the rib body 37 from the base 16 to the inflow port 35. The reinforcing rib 38 reinforces the valve shaft guide 34 and also functions as a part for preventing molding defects.

  The partition wall 41 is formed so as to shut off the secondary side of the check valve mechanism 17 and the primary side of the vent valve mechanism 18, and is provided in a substantially arc shape, whereby the secondary side of the check valve mechanism 17. An air passage 42 is formed around the side. Due to this air passage 42, the vicinity of the secondary side of the check valve mechanism 17 is a wide space.

  Further, the sealing body 5 is provided with an upper O-ring 43 and a lower O-ring 44. The upper O-ring 43 is attached to a concave groove 5 a formed on the outer peripheral side of the sealing body 5. The upper O-ring 43 seals between the ventilation lid 4 and the sealing body 5 in the vicinity of the upper side, and an airtight chamber (valve chamber) 20 that is a space surrounded by the ventilation lid 4 and the sealing body 5 is provided. It is done. By the airtight chamber 20, the external air taken in from the ventilation chamber 19 passes through the ventilation valve mechanism 18 and the check valve mechanism 17, and then is supplied into the lid body 3.

  The lower O-ring 44 is attached to a concave groove 5 b formed on the outer peripheral side of the lower position of the sealing body 5. The lower O-ring 44 seals the space between the vent lid body 4 and the sealing body 5 in the vicinity of the lower side, and seals the water pressure when the odor or drainage flows back into the lid body 3 and the water pressure increases. It is possible to prevent the outside air from entering the covered body by short-circuiting.

  Also, a pair of finger hooks 45, 45 are provided on the outer periphery on the bottom side of the sealing body 5, and the sealing body 5 is rotated by holding the finger hook 45 and rotating the sealing body 5. It can be attached to and detached from the body 4.

  As shown in FIGS. 2 to 4, an engagement protrusion 5 c that engages with an engagement groove 15 a provided on the inner periphery of the bulging chamber 15 of the ventilation lid 4 is formed on the lower outer periphery of the sealing body 5. Has been. The sealing body 5 is built in the ventilation lid body 4 by gripping and rotating the finger hook portion 45 so as to engage the engagement protrusion 5c with the engagement groove 15a. Thus, since the sealing body 5 and the ventilation lid body 4 are integrated by the rotational engagement means by the engagement protrusion 5c and the engagement groove 15a, compared with the case where the fixing means by screwing is provided. This reduces the molding cost during manufacturing. Further, one of the plurality of engagement protrusions 5c is a small engagement protrusion 5d, and a small engagement groove 15b that engages with the small engagement part 5d is formed, whereby the air inlet 7 and the ventilation are formed. Positioning with the chamber 19 is ensured.

  When the sealing body 5 is fitted into the ventilation lid body 4, the upper O-ring 43 and the lower O-ring 44 seal a predetermined position between the sealing body 5 and the ventilation lid body 4. A ventilation chamber 19 that is an air inflow portion is formed therebetween, and the ventilation chamber 19 communicates with the air inlet 7. As a result, the external air flowing in from the air inlet 7 flows into the sealed body 5 through the vent chamber 19.

  Further, a step portion 5 e is provided on the outer periphery of the upper side of the lower O-ring 44 in the sealing body 5, and this step portion 5 e is engaged with a step-like portion 4 a formed on the ventilation lid body 4. By this engagement structure, the step portion 5e serves as a pressure-resistant portion, and when a positive pressure or a drainage head pressure is applied to the drainage system 2, this pressure is transmitted to the step portion 5e via the step portion 4a. Since the pressure is concentrated on the sealing body 5 by the step portion 5e, the pressure to be applied to the check valve mechanism 17, the vent valve mechanism 18, and the vent chamber 19 is dispersed. In addition, by forming the stepped portion 5e, it is possible to minimize the reinforcement in the vicinity of the ventilation chamber 19 of the sealing body 5, so that the ventilation chamber 19 can be provided widely. Thus, a predetermined ventilation amount is secured.

  The adapter 6 shown in FIGS. 6 and 7 is built in the ventilation lid 4 at a position below the sealing body 5. The adapter 6 has a circular frame 6 a that can be fitted to the lower inner peripheral surface of the sealing body 5 by resin molding, and also has a shielding part 50 and a ventilation part 51. Further, a mounting portion 52 is provided on the outer peripheral side of the adapter 6.

  The shielding unit 50 has a function of protecting the check valve mechanism 17. Moreover, the shielding part 50 is formed in a substantially bowl shape, and a guide surface 53 for guiding outside air is formed on the bottom surface side of the shielding part 50 by this substantially bowl-like shape. Here, the shielding part 50 may have a reverse bowl shape, that is, a shape that protrudes upward. However, the air may be guided below the shielding part 50 to have a substantially bowl shape that protrudes downward as in the present embodiment. In addition, it is also preferable for draining the drain described later.

  Further, a radial lattice 54 is provided around the shielding portion 50, and the shielding portion 50 is integrated with the frame body 6a via the lattice 54. In the present embodiment, the shielding portion 50 is integrated with the frame body 6a by the lattice 54. However, as shown in another embodiment of FIG. 8, a plurality of ribs 55 are provided around the shielding portion 50. The shielding part 50 may be integrated with the frame body 6a by the rib 55. A drain hole 56 is provided in the center of the shielding part 50.

The ventilation portion 51 is a ventilation gap formed between the lattice 54 or the ribs 55, and air communicates from the ventilation lid body 4 to the lid body 3 through the ventilation gap 51.
Further, between the ventilation part 51 and the frame body 6 a on the outer peripheral side of the ventilation part 51, a flow path guide part 57 having a tapered surface or a circular arc surface is formed. The flow path guide portion 57 is formed at an arbitrary angle so as to incline in the substantially central direction of the lid body 3 after the adapter 6 is attached, and air is guided from the vent lid body 4 by the flow path guide portion 57. It has come to be. At this time, the air is guided toward the vent hole 7 b of the partition plate 7 by the angle of the flow path guide portion 57.

  The attachment portion 52 is formed in a substantially L shape and is provided for attaching the adapter 6 to the finger hook portion 45. When attaching the adapter 6, the adapter 6 is inserted from below the sealing body 5, and the adapter 6 is rotated with respect to the sealing body 5, so that the horizontal mounting portion 52 in the horizontal direction of the mounting portion 52 becomes the finger hook portion 45. The vertical mounting portion 52b in the vertical direction comes into contact with the side surface of the finger hook portion 45. Thereby, the adapter 6 is fixed to the finger hook portion 45 and is integrated with the ventilation lid body 4 in a state where the adapter 6 is built in a predetermined position of the ventilation lid body 4.

  Furthermore, a rod-shaped protrusion 58 for preventing erroneous mounting is provided on the upper surface side of the adapter 6. As shown in FIG. 7, the protrusion 58 is provided at a position slightly decentered from the center with respect to the circular adapter 6. Further, the lower surface 6 b of the adapter 6 is disposed above the bottom portion 4 b of the vent lid body 4 to prevent interference with the partition plate 7 mounted in the lid body 3.

Subsequently, the operation of the above-described ventilation device will be described.
When the drainage system 2 is not drained, the inside of the lid body 3 is at atmospheric pressure, the valve body 31 of the vent valve mechanism 18 is seated on the valve seat 36 by its own weight, and the inflow port 35 is closed. It is in the state that was. On the other hand, the check valve mechanism 17 maintains the state in which the valve body 21 is seated on the valve seat 28 by the urging force of the spring 25, and the inflow port 27 is closed.

Now, when drainage flows into the drainage system 2, the drainage flows into the covered body 3 through the inflow pipe 12. When drainage flows through the lid body 3, negative pressure is generated in the lid body 3, and negative pressure is also generated on the opening side of the vent lid body 4.
When a negative pressure is generated on the opening side of the ventilation lid body 4, the valve body 21 of the check valve mechanism 17 descends against the urging force of the spring 25 due to the negative pressure, and is separated from the valve seat 28 to be separated from the inlet 27. Is released. Subsequently, the airtight chamber 20 between the check valve mechanism 17 and the vent valve mechanism 18 becomes negative pressure, and the negative pressure raises the valve body 31 of the vent valve mechanism 18 to open the inlet 35. Outside air flows into the airtight chamber 20 through the inflow port 35. The air passes through the hermetic chamber 20 and the check valve mechanism 17 and flows into the lid body 3 from the lower side of the base 16.

  Thereby, at the time of drainage, air flows into the lid body 3 by the sealing body 5 having the check valve mechanism 17 and the vent valve mechanism 18 built in the vent lid body 4, and the negative pressure is reduced. Drainage smoothly flows from the drain pipe 13 without breaking a trap (not shown) connected to the device. As a result, the amount of drainage that can flow into the drainage system 2 can be increased, leading to an improvement in drainage capacity.

When the negative pressure in the drainage system 2 is reduced, the valve body 21 of the check valve mechanism 17 is seated on the valve seat 28, the inlet 27 is closed, and then the valve body 31 of the vent valve mechanism 18 is valved. By sitting on the seat 36 and closing the inlet 35, the inflow of external air is stopped, and the outflow of odor to the outside is prevented.
At this time, even if the drainage system 2 is filled with water, the check valve mechanism 17 prevents the backflow of drainage, and the check valve mechanism 17 has a stable valve body operation. Ventilation performance is ensured.

  Thus, since the sealing body 5 having the check valve mechanism 17 and the ventilation valve mechanism 18 is built in the ventilation lid body 4, the ventilation device body 1 is opposite to the ventilation function while maintaining compactness. The stop function can be demonstrated. Moreover, in the above-described embodiment, even if the ventilation valve mechanism 18 is damaged, the check valve mechanism 17 reliably maintains the check and ventilation functions and prevents odors from flowing out.

  Although the case where the check valve mechanism 17 and the vent valve mechanism 18 are provided has been described in the above embodiment, only the check valve mechanism 17 may be provided. Also in this case, as in the above case, the check valve mechanism 17 provides a check and ventilation function. Further, the structure is simplified and the structure can be easily manufactured while the cost is reduced.

  When only the check valve mechanism 17 is provided in the vent lid body 4 in this way, the vent valve mechanism 18 is excluded, and the vent lid body has an air inlet that communicates with the outside air when the check valve mechanism 17 is opened. 4 is provided at an appropriate position. Further, a communication port communicating with the air inflow port is provided at an appropriate position of the base 16. Since the other structure is the same as that of the above embodiment, the description thereof is omitted.

  Moreover, in the said embodiment, although the adapter 6 is incorporated in the ventilation lid body 4, this adapter 6 can also be incorporated in the to-be-covered body 3. FIG.

Next, the operation of the ventilation device of the present invention in the above embodiment will be described.
In the venting device of the present invention, the adapter 6 is disposed below the sealing body 5 having the check valve mechanism 17 and the vent valve mechanism 18, and the adapter 6 protects the check valve mechanism 17. Therefore, the splashed water generated when the drainage merges, the foreign matter that jumps out, and the steam of the drainage are shielded so that they do not touch or adhere to the check valve mechanism 17. Can do. As a result, normal operation of the check valve mechanism 17 is ensured, and odor leakage, backflow leakage, poor ventilation, and the like are prevented.

  In addition, when the check valve mechanism 17 and the vent valve mechanism 18 shown in FIG. 3 are opened, the air that flows from the outer periphery of the valve body 21 of the check valve mechanism 17 is guided by the guide surface of the shield 50 as shown by the arrows. 53 flows to the center side along the line 53, and the air is guided by a vent 51 formed around the shield 50 and a tapered or arcuate flow path guide 57 provided on the outer periphery of the vent 51. Guided to the surface 53 side.

  Thereby, the air from the vent lid body 4 flows so as not to diffuse in the lid body 3 and is concentrated in the vicinity of the center of the lid body 3, and the efficiency of the air flow is increased to improve the ventilation performance. . In this case, the flow path guide portion 57 exhibits the same air guiding function regardless of whether it is tapered or arcuate. And although it has the shielding part 50, sufficient ventilation can be performed by utilizing the lower area | region of the ventilation valve mechanism 18 as ventilation space. In addition, since the drain hole 56 is provided in the center of the shielding part 50, internal dew condensation water is drained from this drain hole 56, and accumulation of water is prevented.

  Further, since the ventilation portion 51 is a ventilation gap formed between the lattices 54, even if air flows backward in the ventilation device main body 1 and pests such as worms are included in the air, This pest is blocked by the lattice 54 and prevented from entering the valve body 21 side. For this reason, it is prevented that a pest adheres to the valve body 21, and the valve body 21 can always be seated on the valve seat 28 in a highly sealed state.

  Further, an attachment portion 52 is provided on the outer peripheral side of the adapter 6, and the attachment portion 52 is rotationally engaged with the finger hook portion 45 of the sealing body 5 so that the adapter 6 is built in the ventilation lid body 4. The sealing body 5 can be mounted at a predetermined position. Thereby, when the adapter 6 is mounted, the positions of the shielding part 50 and the ventilation part 51 with respect to the check valve mechanism 17 are always mounted in a constant state. In addition, this mounting structure prevents the adapter 6 from falling off the sealing body 5.

  Moreover, since the projection 58 for preventing erroneous mounting is provided eccentrically on the upper surface side of the adapter 6, as shown in FIG. 7, when the adapter 6 is properly attached to the sealing body 5, as shown in FIG. Thus, the protruding portion 58 escapes to the position of the air passage 42 and does not come into contact with the base 16. On the other hand, when the adapter 6 is not in a regular attachment state with respect to the sealing body 5 (a state rotated by 180 ° from the regular attachment state), the protrusion 58 is in a position to contact the bottom plate portion 38, The adapter 6 cannot be attached to the sealing body 5. In this way, by forming the protruding portion 58 so as to be eccentric with respect to the adapter 6, the adapter 6 can be attached only in a normal attachment state, and erroneous attachment of the adapter 6 is prevented.

It is sectional drawing which showed an example of the drainage system. It is a partially expanded sectional view of FIG. It is a partially expanded sectional view which shows the state which the non-return valve mechanism and ventilation valve mechanism of FIG. 2 operate | moved. It is an expansion perspective view which shows a sealing body. It is a disassembled perspective view of a sealing body. It is an expansion perspective view of an adapter. It is a partially notched bottom view which shows one Embodiment of the ventilation apparatus of this invention. It is a partially notched bottom view which shows other embodiment of the ventilation apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aeration apparatus main body 3 Cover body 4 Ventilation lid body 5 Sealing body 6 Adapter 10 Outflow port 11 Inflow port 14 Confirmation opening part 17 Check valve mechanism 18 Venting valve mechanism 45 Finger hook part 50 Shielding part 51 Ventilation part (ventilation gap)
52 Mounting portion 53 Guide surface 54 Lattice 55 Rib 56 Drain hole 57 Flow path guide portion 58 Projection portion

Claims (7)

  The container-shaped cover body is provided with an outlet and a plurality of inlets, and a check opening provided in the cover body is detachably covered with a ventilation lid body, and a check valve mechanism is attached to the ventilation lid body. Alternatively, in a ventilator that has a built-in sealing body having a check valve mechanism and a vent valve mechanism, and allows the outside air to flow in by the sealing body to release the negative pressure state in the covered body and to keep the closed state at all times. An aeration apparatus characterized in that an adapter is disposed at a lower position of the sealing body, and the adapter includes a shielding part for protecting the check valve mechanism and a ventilation part having a ventilation function.   The ventilation device according to claim 1, wherein the adapter is built in the ventilation lid at a position below the sealing body.   The adapter is formed in a circular shape, an attachment portion is provided on the outer peripheral side of the adapter, the attachment portion is attached to a finger hook portion formed on the outer periphery of the sealing body, and the adapter is built in the ventilation lid. 2. The aeration apparatus according to 2.   The ventilation according to any one of claims 1 to 3, wherein a drain hole is provided in the center of the shielding part formed in a substantially bowl shape, and the bottom side of the bowl-like shielding part is a guide surface for guiding outside air. apparatus.   The air vent is a radial lattice formed around the shielding portion or an air gap formed between a plurality of ribs, and air communicates with the air through the air gap. The ventilator according to any one of 4.   The ventilation device according to claim 5, wherein a flow path guide portion having a tapered surface or a circular arc surface that guides ventilation is formed on an outer peripheral side of the ventilation portion of the adapter.   The ventilation device according to any one of claims 2 to 6, wherein a protrusion is provided on an upper surface side of the adapter, and the adapter is prevented from being erroneously attached by the protrusion.

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