JP4163743B1 - Ventilator with built-in vent lid - Google Patents

Abstract

An object of the present invention is to provide a highly durable and ventilating device with a built-in venting lid that can ventilate the inside of the lid such as merging and can effectively exhibit an excellent venting function while reducing the overall size.
In a venting device including a vent lid for connecting to a container-shaped lid body having an outflow inlet, a vent valve mechanism is not exposed to the outer surface of the vent lid, or vice versa. The stop valve mechanism 41 is built in a part of the vent lid body 70. The vent valve mechanism 31 or the check valve mechanism 41 is opened when the inside of the lid body 2 becomes negative pressure and communicates with the outside air to be covered. This is a vent lid built-in type ventilator that releases the negative pressure state in the lid 2 and keeps the closed state at all times.
[Selection] Figure 4

Description

  The present invention relates to a ventilator with a built-in vent lid. For example, the ventilator is attached to a drainage facility such as a confluence or drainage or a drainage header. The present invention relates to an aeration device with a built-in vent lid suitable for a type with a built-in lid for merging and draining.

  Conventionally, there is a drainage system in which a plurality of drainage pipes are aggregated by 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 because the piping space can be made compact and the construction is simple.

As this type of drainage system, for example, the residential drainage system of Patent Document 1 is known. This drainage drainage system is a system in which a header with a plurality of drainage branch pipes connected under the floor and a drainage basin connected to the outflow side of this header via a drainage main pipe. A breakage prevention device is provided between the two.
As shown in FIG. 5 of the same document, the anti-seal device is a vent valve provided in a 90-degree elbow joint on the header outflow side, and this vent valve prevents the trap from being broken.

  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 plumbing system is designed to prevent toilet odors and trap odors by connecting the downstream side of the drainage main pipe to the trap trough, and is also provided as a vent pipe by omitting part of the equipment trap upstream of the drainage branch pipe This is an attempt to prevent the remaining instrument trap from being broken.

  Patent document 3 is an indoor underfloor piping structure using a drainage basin. This underfloor piping is composed of a drainage basin composed of a basin body and a culvert lid, a drainage main pipe and a drainage branch pipe connected to the drainage basin. It is configured. In particular, the drainage basin is equipped with an intake valve that is exposed on the top surface of the jar lid. By this intake valve, outside air is sucked to prevent the trap from being sealed and to prevent the air in the drainage basin from being discharged. It is said.

JP 2002-61247 A JP 2003-138621 A JP 2001-40745 A

  However, the piping system of Patent Document 1 or the piping equipment of Patent Document 2 is provided outside the ventilation part, and this ventilation part is provided in a state where the size and height are not limited. For this reason, if the ventilation portion is made large in order to ensure a predetermined amount of ventilation, a wide piping space is required.

  In addition, if the ventilation part is provided under the floor, the drainage will drain, but when it receives a high pressure, the ventilation part may not be able to withstand the pressure on the drainage side and may be damaged. In particular, if the drainage system is clogged, there is a greater risk of damage due to high water head pressure.In addition, in order to reinforce this ventilation part, simply increasing the number of reinforcing parts such as ribs will increase the ventilation resistance. The ventilation performance is reduced.

  On the other hand, Patent Document 3 tries to reduce the negative pressure in the pipe with an intake valve provided on the outer surface of the drainage lid, but this intake valve is installed in a state exposed to the outside of the lid. In addition to the downsizing, there is a risk that damage may occur due to contact with the intake valve itself, especially in a small installation place. Also, there is moisture and dust under the floor. As a result, the intake valve itself may become clogged, resulting in malfunction, and as a result, odors in the piping may be discharged to the outside, and there is a strong demand for solutions to these problems.

  In addition, since the intake valve protrudes from the drainage lid to the outer surface, not only is it inconvenient to transport and store, but if the volume is increased, the entire drainage will increase. A valve had to be installed, and eventually, the negative pressure in the drainage basin could not be surely and immediately resolved.

  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. An object of the present invention is to provide a ventilating apparatus with a built-in vent lid that can exhibit a stopping function and has high durability.

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 detachable with a ventilation cover body. A cylindrical vent sealing body is attached to the cylindrical bulge chamber formed in the vent lid body via upper and lower O-rings, thereby providing a space between the bulge chamber and the upper surface of the vent seal body. A ventilation chamber or a communication port is formed in the ventilation sealing body while the upper and lower O-rings are positioned, and an air inlet formed in the ventilation lid body. Further, the vent sealing body is provided with a vent valve mechanism or a check valve mechanism , and the vent valve mechanism or the check valve mechanism is connected to the sealing chamber when the inside of the lid body becomes negative pressure. said via vent or communication port is allowed to flow outside air from said air inlet to negative pressure state of the lid body Dividing, and normally a ventilator cap embedded venting device designed to hold the closed state by the vent valve mechanism or a check valve mechanism.

According to a second aspect of the present invention, the vent valve mechanism is provided with a vent portion that opens a side of the vent seal, and a reinforcing rib is provided on the valve seat that communicates with a bottom plate portion of the vent portion and the seal chamber. This is a ventilation device with a built-in ventilation lid formed in the radial direction toward the inlet .

According to a third aspect of the present invention, there is provided a ventilated lid-type ventilator in which a valve shaft guide is integrally provided on the reinforcing rib.

According to a fourth aspect of the present invention, there is provided a ventilating apparatus with a built-in vent lid in which a valve shaft is suspended from a valve element seated on the valve seat, and the valve shaft is provided so as to be guided by the valve shaft guide.

The invention according to claim 5 is the ventilating device with a built-in vent lid in which a through hole having both a communication function and a visual recognition function is formed at the position of the bottom plate portion at the lower end of the valve shaft guide.

According to a sixth aspect of the present invention, a stepped portion is formed on the upper outer periphery of the lower O-ring of the ventilated sealing body, and the stepped portion is engaged with the bulging chamber of the vented lid body to form a pressure-resistant portion. It is a mold aeration device.

The invention according to claim 7 is characterized in that the ventilation sealing body is formed by rotating engagement means by an engagement projection provided on the outer periphery of the lower part of the ventilation sealing body in an engagement groove formed on the periphery of the bulging chamber of the ventilation lid body. This is a ventilation device with a built-in ventilation lid mounted inside the ventilation lid.

According to the first aspect of the present invention, there is provided a vent device provided with a vent lid for connecting to a container-like lid having an outflow inlet, and the vent valve mechanism is not exposed to the outer surface of the vent lid. or the check valve mechanism from built in vent lid, ventilation of the lid body of the merging masu or the like is reliably performed, high durability can exhibit good ventilation and return function while reducing the overall compactness It is possible to provide a ventilation device with a built-in ventilation lid.

In addition , while maintaining compactness, it is possible to achieve ventilation and non-returning performance, and it is possible to configure a container such as a confluence for drainage while demonstrating this high functionality. For example, it is a ventilation device with a built-in ventilation lid that can be installed under the floor.

In addition , leakage in the sealed chamber can be prevented, and when the negative pressure is generated, the vent valve mechanism and the check valve mechanism can be operated with stable operation, so that a high vent / check function can be achieved and the vent lid and vent seal This seals the water pressure generated when the drainage flows backward to prevent leakage of drainage to the outside, and allows the outside air flowing in from the air inlet to be guided to the ventilation portion without leaking to allow ventilation.

In addition , the ventilation lid body covers the lid body having a container shape and provided with a confirmation opening for visually confirming the outflow inlet and the inside. The lid can be covered with the lid having a built-in ventilation device without affecting the checking operation. In particular, when the ventilation lid is removed from the confirmation opening, it is convenient for maintenance of the ventilation device built in the ventilation lid and the workability is also improved.

According to the invention of claim 2 , while maintaining compactness, it is possible to widen the flow path of the outside air to ensure the air flow rate of the outside air and to reliably exert the valve function, and to improve the overall strength and durability. In addition, it is possible to provide a ventilation device with a built-in ventilation lid that is excellent in performance, and it is not necessary to perform fine alignment when the ventilation lid is built in, and can be easily mounted in a predetermined direction.

According to the third aspect of the present invention, the strength of the valve shaft guide can be increased, the valve body of the vent valve mechanism can be operated stably, and the inflow function can be achieved by allowing outside air to flow evenly into the inlet of the valve during ventilation. Can enhance the airflow and demonstrate excellent ventilation function.

According to the fourth aspect of the invention, the vent valve mechanism can be operated smoothly by the generation of negative pressure, and high ventilation performance can be maintained in response to minute changes in negative pressure.

According to the fifth aspect of the present invention, the valve shaft guide is prevented from being filled with moisture or air infiltrates, and the valve body operates smoothly even when mounted in a damp place such as under the floor. It is possible to ensure that the ventilation function of the ventilation valve mechanism is exhibited, and even after the ventilation device is assembled, the lower end of the valve shaft of the ventilation valve mechanism can be seen through the through-hole and whether or not it is properly incorporated. It can be confirmed more reliably than the appearance.

According to the invention of claim 6 , even when an excessive positive pressure is generated, the pressure-resistant portion can receive the positive pressure evenly over a large area, can reliably withstand this pressure, and can exhibit a ventilation function. Even when a high head pressure is applied to the flow path that is clogged, the check function can be reliably exerted while preventing damage due to the head pressure.

According to the invention which concerns on Claim 7 , a ventilation sealing body can be easily mounted | worn with a ventilation lid body by exact positioning. In addition, the ventilation lid built-in type ventilation device can easily remove the ventilation sealing body from the ventilation lid at the time of maintenance or repair, and can maintain the ventilation and check function for a long time.

Hereinafter, a preferred embodiment of a vent lid built-in vent device will be described in detail with reference to the drawings.
In FIG. 1, a covered body 2 to which a ventilation device with a built-in ventilation lid is attached is used, for example, as a confluence for drainage that is a part of a drainage system 1 disposed under a floor G. A plurality of drainage outlets 7 such as drainage branch pipes are connected to collect the primary side drainage flowing from drainage equipment (not shown) such as a toilet or a washroom, and flow to the secondary side drainage pipe 8. The confluence 2 generally comprises a main body 3 and a vent lid 70. The main body 3 includes a plurality of drainage inlets 4 connecting drainage branch pipes 7 to the primary side and drainage pipes to the secondary side. 8 has an outflow inlet 5 such as one drainage outlet for flowing drainage. As described above, the cover body 2 has a container shape and is provided with a confirmation opening (inspection port) 2a for visually confirming the inside, and the ventilation cover body 70 is covered with the confirmation opening 2a. ing.

  As described above, the ventilation lid 70 is detachably provided on the upper portion of the main body 3, and the ventilation lid 70 can be opened to perform maintenance and cleaning inside the main body 3. The capacity is reduced to make the merge 2 compact. A cylindrical expansion chamber 74 is formed in the ventilation lid 70, and the ventilation sealing body 10 is provided in the expansion chamber 74 so that the ventilation sealing body 10 can be mounted. In the present embodiment, the ventilation lid 70 is used as a lid for joining, but the present invention is not limited to this.

  The ventilation sealing body 10 is formed in a cylindrical shape so as to be incorporated inside the ventilation lid body 70. The base 11 constituting the ventilation sealing body 10 is made of, for example, ABS or other resin, and has a ventilation valve mechanism 31 and a check valve mechanism 41 on the upper side, and a ventilation portion 50 in an intermediate portion.

  The upper O-ring 12 is attached to the concave groove 11a, and when the base 11 is attached to the ventilation lid body 70, the sealing performance of the ventilation sealing body 10 and the ventilation lid body 70 is ensured through the upper O-ring 12. Yes. After the upper O-ring 12 is mounted, a sealed chamber (valve chamber) 13 surrounded by the vent lid 70 and the vent seal 10 is formed by the upper O-ring 12 between the vent lid 70 and the base 11. . By forming the sealed chamber 13, external air taken from the ventilation portion 50 can be supplied into the merge 2 through the ventilation valve mechanism 31 and the check valve mechanism 41.

  On the other hand, the lower O-ring 14 is attached to a concave groove 11b formed on the lower outer periphery of the bottom plate portion 16 of the ventilation sealing body 10, and the ventilation portion 50 between the upper O-ring 12 and the lower O-ring 14 is connected to the air inlet. 72 is communicated. The lower O-ring 14 seals the ventilation lid 70 and the base 11, seals the water pressure generated when the odor and drainage flow in the back flow 2, and seals short-circuit penetration of the outside air into the covered body. It is provided as possible.

  A step portion 23 is formed on the outer periphery of the upper portion of the lower O-ring 14 of the ventilation sealing body 10, and this step portion 23 is engaged with the bulging chamber 74 of the ventilation lid body 70 to form a pressure-resistant portion. Thereby, when the positive pressure or the head pressure of the drainage is applied to the drainage system 1, the vent sealing body 10 receives the concentrated pressure by the step portion 23, so that the vent valve mechanism 31 and the check valve mechanism 41, It forms so that the pressure added to the ventilation part 50 may be disperse | distributed. By forming the step portion 23, the reinforcement in the vicinity of the ventilation portion 50 on the upper side of the ventilation sealing body 10 can be minimized, so that the ventilation portion 50 can be easily arranged widely, and the ventilation portion 50 is facilitated. It is possible to ensure a predetermined amount of ventilation.

  As shown in FIG. 8, on the outer periphery of the lower portion of the vent sealing body 10, a projecting engagement protrusion that can be engaged with an engagement groove 71 provided in the inner periphery of the bulging chamber 74 of the vent lid 70 in FIG. 15 is formed. The ventilation seal 10 is inserted into the ventilation lid 70 according to the shape of the engagement groove 71 after the engagement projection 15 is inserted into the ventilation lid 70, and then rotated with respect to the ventilation lid 70. It is attached to. By providing the rotation engagement means in this way, the manufacturing cost for molding can be suppressed as compared with the fixing structure by screwing, and one of the plurality of engagement protrusions 15 provided has a short length. The small engagement protrusion 15b is formed so as to engage only with the small engagement groove 71b having a short length, so that the air inlet 72 and the ventilation portion 50 of the ventilation lid body 70 into which external air can be introduced. The positioning is ensured.

  When the ventilation sealing body 11 is fitted to the ventilation lid 70, the upper O-ring 12 and the lower O-ring 14 seal between the ventilation sealing body 10 and the ventilation lid 70, and the ventilation between the areas of the O-rings 12 and 14 is performed. An air inflow portion of the portion 50 is formed, and the ventilation portion 50 and the air inlet 72 can communicate with each other, so that the external air flowing in from the air inlet 72 flows into the ventilation sealing body 10.

  10 and 11, the engagement protrusion 15 may be provided with a fitting recess 15a. In this case, the vent lid 70 is fitted with the fitting recess 15a (not shown). By providing the convex portion, it is possible to generate a tactile sensation (clicking sensation) by fitting when the base 11 is mounted on the ventilation lid 70 and rotated. With this tactile sensation, it is possible to confirm the completion of the mounting of the base 11 and the vent lid 70, and it is possible to securely mount them. The fitting recess may have a shape other than the shape shown in the drawing, and the fitting recess may be provided on the base 11 side and the fitting recess may be provided on the ventilation lid 70 side.

  A pair of protrusions 17 and 17 are provided on the bottom surface side of the base 11, and the ventilation seal body 10 is easily attached to and detached from the ventilation lid body 70 by holding the projection 17 and rotating the ventilation seal body 10. I can do it.

A check valve mechanism 31 and a vent valve mechanism 41 are provided at a position communicating with the hermetic chamber 13 of the vent seal 10 so that the negative pressure can be reduced.
As shown in FIG. 3, the vent valve mechanism 31 includes a disc-like valve body 32, a valve shaft 33, and a stopper 34, and external air flows into the portion of the base 11 where the vent valve mechanism 31 is formed. An annular inlet 18 is provided, an annular valve seat 19 on which a valve body 32 can be seated is provided on the secondary side of the inlet 18, and a valve shaft guide 20 is further provided. The valve shaft guide 20 is provided integrally with a reinforcing rib 53 described later.

  The valve body 32 is made of rubber such as EPDM, and is provided so as to be sandwiched between the valve shaft 33 and the stopper 34. The valve shaft 33 is made of a resin such as ABS, has a shaft portion 33 a and a disk-shaped enlarged diameter portion 33 b, and is provided so that the shaft portion 33 a can be inserted into the valve shaft guide 20. Accordingly, the valve shaft 33 is suspended from the valve body 32 seated on the valve seat 19, and the valve shaft 33 is provided so as to be guided to the valve shaft guide 20.

  As shown in FIG. 7, the shaft portion 33 a is provided with a substantially cross-shaped cross section on the front side so that a gap can be formed between the shaft portion 33 a and the valve shaft guide 20 when the shaft portion 33 a is inserted into the valve shaft guide 20. In this gap, drain and air flow. The cross-sectional shape of the shaft portion 33a may be other than a substantially cross shape, and any cross-sectional shape can be provided as long as a gap can be provided between the shaft portion 33a and the valve shaft guide 20. The stopper 34 is made of a resin such as ABS, and has a fitting hole 34a into which the shaft portion 33a is fitted in the central portion. The vent valve mechanism 31 can be integrated by fitting the stopper 34 into the shaft portion 33a in a state where the valve body 32 is mounted on the valve shaft 33.

In addition, the vent valve mechanism 31 is provided with a vent 50 by opening the side of the vent seal 10, and the vent 50 connected to the sealed chamber 13 is opened in the circumferential direction of the vent lid 70. In communication with the inflow port 72, outside air is provided in the ventilation sealing body 10 so as to allow ventilation.
A rib 21 is provided on the valve seat 19 that communicates with the bottom plate portion 16 of the ventilation portion 50 and the sealing chamber 13. The rib 21 is formed in the radial direction toward the air inflow portion.

  The reinforcing rib 53 is provided integrally with the rib 21 at the counter electrode position of the check valve mechanism 41, and the reinforcing rib 53 supports the vent valve mechanism 31 side. As shown in FIG. 7, the reinforcing rib 53 is provided at substantially the center of the inflow port 18, and is formed integrally with the valve shaft guide 20 to reinforce the valve shaft guide 20, and also serves as a molding defect prevention portion. It is functioning. In the present embodiment, as shown in FIG. 5, the ventilation portion 50 is provided at two locations of the right ventilation portion 50 a and the left ventilation portion 50 b by the reinforcing rib 53.

  The partition wall 51 is provided so as to block the primary side of the vent valve mechanism 31 and the secondary side of the check valve mechanism 41, and is formed in a substantially arcuate combination as shown in FIGS. An air passage 52 is provided around the secondary side of the check valve mechanism 41. By this air passage 52, the vicinity of the secondary side of the check valve mechanism 41 is widely provided.

  As described above, the valve shaft guide 20 is provided so that the shaft portion 33a can be inserted therein. Further, a through hole 22 is formed at the position of the bottom plate portion 16 below the valve shaft guide 20, and the valve 22 is formed by the through hole 22. The inside of the shaft guide 20 and the ventilation part 50 are connected. The valve shaft guide 20 prevents intrusion of moisture and air, so that the valve body can be operated smoothly even when it is installed under a damp floor or the like. The function can be surely exhibited, and the lower end of the shaft portion (valve shaft) 33a of the vent valve mechanism can be seen through the through-hole 22 even after the ventilation device is assembled. It can be confirmed more reliably.

  The vent valve mechanism 31 is provided between the sealed chamber 13 and the vent portion 50 as described above, and the valve body 32 is always lowered by its own weight and seated on the valve seat 19 as shown in FIG. Closed closed. When drainage flows from this state and negative pressure is generated, the valve shaft 33 rises as shown in FIG. 6 so that the outside air can be vented from the inlet 18 into the sealed chamber 13 and can be opened via the check valve mechanism 41. Provided.

  As shown in FIG. 3, the check valve mechanism 41 includes a disc-shaped valve body 42, a stopper 44, a valve shaft 43, a stop member 45, and a spring 46, and the check valve mechanism 41 of the base 11. As with the vent valve mechanism 31, an annular inlet 24 and an annular valve seat 25 are provided on the secondary side of the inlet 24, and a rib 27 is provided at a substantially central portion of the inlet 24. A valve shaft guide 26 is provided.

  A valve body (made of rubber such as EPDM) 42 is provided between the valve shaft 43 and the stopper 44 so as to be sandwiched. The valve shaft (made of resin such as ABS) 43 has a shaft portion 43 a and a disk-shaped enlarged diameter portion 43 b, and the shaft portion 43 is provided so as to be inserted into the valve shaft guide 26. A groove 43c to which the stop member 45 can be attached is formed on the tip end side of the shaft 43a. The stopper (made of resin such as ABS) 44 has a fitting hole 44a into which the shaft portion 43a is fitted at the central portion. The stop member (made of resin such as ABS) 45 is formed in a disc shape and has a mounting hole 45a in the center.

  When incorporating the check valve mechanism 41 into the base 11, first, the stopper 44 is fitted into the shaft portion 43 a with the valve body 42 mounted on the valve shaft 43. Next, the valve body 42 is inserted into the valve shaft guide 26, and the stop member 45 is fitted in the state where the spring 46 is mounted on the outer peripheral side of the shaft portion 43a from the other side of the valve shaft guide 26, so that the valve body 42 and the stopper 44 and the valve shaft 43 can be integrated to provide the check valve mechanism 41.

  As shown in FIG. 4, the check valve mechanism 41 always holds the valve body 42 seated on the valve seat 25 by the elastic urging force of the spring 46 to close the inlet 24 and keep the closed state. When negative pressure is generated by drainage from this state, the valve body 42 descends against the urging force of the spring 46 and opens as shown in FIG. 6, and the air in the valve chamber 13 joins from the inlet 24 2 Can vent to the side.

Then, the effect | action of the said embodiment of the ventilation lid | cover built-in type ventilation apparatus in the said invention is demonstrated.
In the vent lid built-in type ventilator according to the present invention, the vent sealing body 10 is built in the vent lid body 70, and the check valve mechanism 41 (the vent valve mechanism 31) having the vent and check mechanism in the vent lid body 10 is provided. Since the check valve mechanism 41 (the vent valve mechanism 31) is provided in the main body 3 and the vent cover body 70, which normally constitute the merging maser 2, the merging 2 can be made compact. Does not increase in size. Thereby, the piping space of the whole drainage system 1 can be made small, and the drainage system 1 effective in a narrow piping space can be constructed.

  In the drainage system 1, when there is no drainage, as shown in FIG. 4, the pressure on the opening side of the vent lid body 70 (the side to join two) is atmospheric pressure, and the valve body 32 of the vent valve mechanism 31 It is seated on the valve seat 19 of the inlet 18 by its own weight, and the inlet 18 is in a closed state. Similarly, in the check valve mechanism 41, the valve body 42 is seated on the valve seat 25 by the elastic biasing force of the spring 46, and the inlet 24 is closed.

If there is drainage from the drainage device, this drainage flows into the junction 2 through the drainage branch pipe 7 of the drainage system 1. When the drainage flows, a negative pressure is generated in the confluence 2 and a negative pressure is also generated on the opening side of the vent lid 70.
When negative pressure is generated on the opening side of the vent lid 70, the negative pressure causes the valve body 42 of the check valve mechanism 41 to move away from the valve seat 25 against the spring force of the spring 46, thereby opening the inlet 24. Subsequently, the sealed chamber 13 between the check valve mechanism 41 and the vent valve mechanism 31 becomes negative pressure, the valve body 32 of the vent valve mechanism 31 is lifted by the atmospheric pressure, and the inlet 18 is opened. 6, outside air flows from the inlet 18. This air passes through the sealing chamber 13 and the check valve mechanism 41 and is supplied into the second joining space 2 from below the base 11.

At this time, the reinforcing ribs 53 are formed along the radial direction, so that a wider flow path of the external air is ensured than in the case where the reinforcing ribs 53 are provided in the circumferential direction, and ventilation is not hindered. By providing the reinforcing rib 53 substantially at the center of the inflow port 18, external air is caused to flow into the inflow port 18 from both the right and left vent portions 50 a and 50 b sandwiching the reinforcing rib 53 in FIG. 5. be able to. For this reason, outside air can be made to flow evenly into the vent valve mechanism 31, and a stable valve body operation can be performed.
The reinforcing rib 53 is provided at a position opposite to the air inlet 72 of the ventilation lid 70, so that the position can be confirmed when the ventilation sealing body 10 is attached to the ventilation lid 70 as shown in the figure. It is not necessary to strictly align the portion 50 and the air inlet 72.

  In addition, since a vent path 52 is provided on the secondary side of the check valve mechanism 41 and the vicinity of the secondary side of the check valve mechanism 41 is widened by the vent path 52, the amount of ventilation of the check valve mechanism 41 can be secured. The check valve mechanism 41 is surely operated according to the negative pressure generated in the merging 2 (drainage system 1) while the vent seal 10 is small, and the drainage pipe 8 side and the sealing chamber 13 are operated. The vent valve mechanism 31 can be operated by communicating the sides.

  Thus, by incorporating the ventilation sealing body 10 in the ventilation lid body 70, it is possible to reduce the negative pressure by allowing air to flow into the confluence 2 and to protect the drain pipe (not shown) to drain the water. It can flow smoothly. As a result, the amount of drainage that can flow into the drainage system 1 can be increased, and the drainage capacity can be improved.

Next, when the negative pressure in the drainage system 1 is reduced, the valve body 42 of the check valve mechanism 41 is seated, and subsequently, the valve body 32 of the vent valve mechanism 31 is seated and the inlet 18 is closed. Thus, the inflow of external air is stopped and odor is prevented from flowing out.
At this time, the check valve mechanism 41 is provided in the ventilation lid 70 and is provided in the vicinity of the drainage flow path. However, even if the flow path becomes full, drainage flows out by the check valve function. In addition, an excellent ventilation function is exhibited by stable valve body operation.

  As shown in this example, when the confluence 2 is installed under the floor G, a head pressure of the height of a drainage stand (not shown) connected to the drainage branch 7 may be applied to the confluence 2; In the case of a three-story detached house, when the drainage equipment installed on the third floor is clogged, the water head pressure of this height will be added to 2. In the ventilation device with a built-in ventilation lid in the above embodiment, a step portion 23 is formed on the outer periphery of the lower portion of the ventilation sealing body 10, and this step portion 23 is engaged in the bulging chamber 74 of the ventilation lid body 70 to form a pressure-resistant portion. Therefore, the pressure is received by the pressure-resistant portion in a concentrated manner, and the force applied to the vent valve mechanism 31, the check valve mechanism 41, and the vent portion 50 is dispersed to withstand an excessive pressure. In addition, since the reinforcing structure of the ventilation sealing body 10 can be kept to the minimum of the partition walls 51 and the reinforcing ribs 53, a predetermined ventilation amount can be secured while having compactness that can be mounted in the ventilation lid body 70. Can exhibit excellent ventilation performance.

  Further, although moisture is increased under the floor G, the ventilation seal 10 has a through hole 22 formed at the position of the bottom plate portion 16 at the lower end of the valve shaft guide 20, so that it enters the valve shaft guide 20. The infiltrated material such as drain or air can be drawn downward from the through-hole 22, whereby the valve body operation of the vent valve mechanism 31 can be performed smoothly.

When the check valve mechanism 41 and the vent valve mechanism 31 are provided in the vent lid 70 as in the present embodiment, the check valve mechanism 41 checks and vents even if the vent valve mechanism 31 is damaged. It is possible to prevent the odor from leaking outside by demonstrating its function reliably.
Moreover, although the said embodiment demonstrated the case where the non-return valve mechanism 41 and the vent valve mechanism 31 which are other invention were provided on description, only a non-return valve mechanism is used as a ventilation lid | cover built-in type ventilation apparatus in this invention. May be provided. In this case, as well as the above case, the check valve mechanism can sufficiently exert the check and ventilation functions, the structure can be simplified, the manufacturing is easy, and the cost is reduced. it can. When only the check valve mechanism 41 is provided in the vent lid body 70, as shown in FIG. 12, the vent valve mechanism 31 shown in FIG. The check mechanism 41 is provided inside, and an air inlet 72 that communicates with the outside air when the check mechanism 41 is opened is provided at an appropriate position of the vent lid 70. Further, a communication port 72 a communicating with the air inlet 72 is provided at an appropriate position of the base 11. Since other structures are the same as those in the above-described embodiment, description thereof is omitted.

It is sectional drawing which showed an example of the drainage system. It is the perspective view which showed one Embodiment of the ventilation apparatus with a built-in ventilation lid. It is a disassembled perspective view of the ventilation apparatus with a built-in ventilation lid. It is sectional drawing of a ventilation apparatus with a built-in ventilation lid. It is a schematic external view in the C direction of FIG. It is sectional drawing which showed the state which the ventilation apparatus with a ventilation lid of FIG. 4 operated. It is AA sectional drawing of FIG. FIG. 5 is a partially cut-out bottom view of FIG. 4. It is sectional drawing which showed the principal part of the ventilation lid. It is explanatory drawing which showed the engagement state of the ventilation sealing body and the ventilation lid body. It is the B section enlarged view of FIG. It is sectional drawing of the ventilation apparatus with a built-in ventilation lid which provided only the non-return valve mechanism.

Explanation of symbols

2 join (cover)
2a Confirmation opening 10 Ventilation seal body 12 Upper O-ring 13 Sealing chamber 14 Lower O-ring 15 Engaging protrusion 16 Bottom plate portion 19 Valve seat 20 Valve shaft guide 22 Through hole 23 Step portion 31 Ventilation valve mechanism 32 Valve body 33 Valve shaft 41 Check Valve Mechanism 50 Ventilation Portion 53 Reinforcement Rib 70 Ventilation Cover 71 Engagement Groove 72 Air Inlet 74 Swelling Chamber

Claims (7)

A container-shaped cover body is provided with an outlet and a plurality of inlets, and a confirmation opening provided in the cover body is detachably covered with a ventilation lid body, and a cylindrical expansion formed in the ventilation lid body. A cylindrical ventilation sealing body is mounted in the exit chamber via upper and lower O-rings to form a sealing chamber between the bulging chamber and the upper surface of the ventilation sealing body. A ventilation portion or a communication port is formed while the O-ring is located, and the ventilation portion or the communication port is communicated with an air inlet formed in the ventilation lid body. A check valve mechanism is provided, and this vent valve mechanism or check valve mechanism allows outside air to be discharged from the air inlet through the sealing chamber and the vent or the communication port when the inside of the lid body becomes negative pressure. by flowing release the negative pressure state of the lid body, and normally in the vent valve mechanism or the check valve mechanism Ventilator cap built-venting device being characterized in that so as to retain the closed state Ri. The vent valve mechanism, wherein the side of the vent seal is opened the vent provided, diameter bottom plate and reinforcing ribs on the valve seat communicating with said sealing chamber toward the air inlet direction of the ventilation unit formed claims 1 Symbol placement of the vent cover built-in ventilation device. The ventilating device with a built-in vent lid according to claim 2, wherein a valve shaft guide is provided integrally with the reinforcing rib. The ventilator with a built-in vent lid according to claim 3 , wherein a valve shaft is suspended from a valve body seated on the valve seat, and the valve shaft is provided so as to be guided by the valve shaft guide. The ventilation device with a built-in vent lid according to claim 4, wherein a through hole having both a communication function and a visual recognition function is formed at a position of a bottom plate portion at a lower end of the valve shaft guide. Wherein the upper periphery of the lower O-ring of the vent seal to form a step portion, ventilator cap built-venting device of the stepped portion is engaged with the swelled chamber of the vent lid according to claim 1, wherein the pressure-resistant portion . The vent sealing body is mounted in the vent lid body by rotational engagement means by an engaging projection provided on the outer periphery of the lower part of the vent sealing body in an engaging groove formed on the outer periphery of the bulging chamber of the vent lid body. 1 Symbol placement of the vent cover built-in ventilation device.

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