JP3242846U - Container valve - Google Patents

Abstract

An object of the present invention is to provide a thin container valve capable of discharging an internal fluid. A container valve (13) is attached so as to close a hole (14) formed in a sealed container (10) and controls the flow of fluid passing through the hole (14). The container valve 13 comprises a base material 20 in which an opening 23 is formed without blocking a hole 14, a first valve film 31 superimposed on the base material 20, and a second valve film 32 superimposed on the first valve film 31. - 特許庁The base material 20 has tackiness or adhesiveness on both upper and lower surfaces, and airtightness is ensured between the sealed container 10 and the base material 20 and between the base material 20 and the first valve film 31 by the tackiness or adhesiveness. The first valve film 31 and the second valve film 32 are detachably adhered to each other by the self-adhesive force of the films, and when the internal pressure of the sealed container 10 rises, the gap between the two valve films opens to deaerate, and when the internal pressure drops, the self-adhesive force between the two valve films closes the valve passage between the two valve films. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to an improvement of a container valve that is attached so as to close a hole in a sealed container such as a case or bag.

In general, food is stored and distributed in sealed containers such as cases and bags. Some of these foods, such as cereals, miso, and coffee beans, generate various gases associated with ecological activities such as fermentation and respiration. There is a need. As a means for that purpose, an overpressure valve (container valve) in a packaging container as shown in Patent Document 1 has been proposed.

Since the overpressure valve of Patent Document 1 uses resin-molded molded parts, the thickness of the entire overpressure valve is increased, and the thickness of the container to which the overpressure valve is attached is also increased. becomes bulky.
For example, in the case of a miso company, when filling miso into a container, there is a process of sealing the lid sheet with the container valve attached to the container body. It is At that time, if the lid sheets to which the container valves are attached are bulky, the number of lid sheets that can be stacked on the aligning machine is extremely reduced. Accordingly, there is a demand for a thin container valve that can be constructed without using molded parts. In addition, since gas generation from food varies depending on the type of food and temperature conditions, there is a demand for container valves that have the same appearance but different performance.

Japanese Patent No. 4361953

SUMMARY OF THE INVENTION An object of the present invention is to provide a thin container valve that can smoothly discharge internal fluid to the outside of a sealed container.

SUMMARY OF THE INVENTION The present invention is a container valve that is attached so as to close a hole in a sealed container and controls the flow of fluid passing through the hole. This container valve includes a base material having an opening formed without blocking the hole, a first valve film superimposed on the base material, and a second valve film superimposed on the first valve film. and a two-valve film. At least around the opening, the base material has tackiness or adhesiveness on both upper and lower surfaces, and between the sealed container and the base material, and between the base material and the first valve film. The airtightness is ensured by the tackiness or adhesiveness of the base material. The first valve film and the second valve film are detachably adhered to each other by the self-adhesive force of the film, and when the internal pressure of the sealed container increases, the valve film is in the adhesive state due to the self-adhesive force. The valve passage is closed when the valve passage in between is opened to deaerate and the internal pressure of the sealed container drops.

Further, the present invention comprises a base material having an opening formed in a manner that does not block the hole, a first valve film superimposed on the base material, and a second valve film disposed on the first valve film. a valve film; and a third valve film interposed between the first valve film and the second valve film, wherein at least around the opening, the substrate is coated on both top and bottom surfaces with adhesive or adhesive. Adhesiveness is provided, and airtightness is ensured between the sealed container and the base material and between the base material and the first valve film by the adhesiveness or adhesiveness of the base material, At least one of the first valve film and the second valve film and the third valve film are detachably adhered to each other by the self-adhesion of the films, and the sealed container When the internal pressure of the container rises, the valve passage between the valve films in the adhesive state due to the self-adhesive force opens to deaerate, and when the internal pressure of the sealed container decreases, the valve passage closes. I will provide a.

When implementing each of the above-described inventions, the first valve film is arranged on at least one of the left and right sides of the opening, and a seal that adheres the first valve film and the second valve film is provided. are formed on both upper and lower sides of the opening, and the valve passage is a valve passage between the seal portions, and at least one of the left and right sides of the first valve film and the second valve film is formed. One of the outer ends is provided with an open port leading to the outside, and the fluid in the sealed housing is degassed to the outside through the hole, the opening, the valve passage, and the open port. can be configured to

At least part of the inner edge of the first valve film constitutes an overlapping portion that overlaps with the opening, and the second valve film is located at the opening and its periphery in the first valve film. The portion that does not overlap the valve film adheres to the base material, and the overlapping portion serves as an opening to the valve passage, and fluid flows from the opening of the overlapping portion to the valve passage. I don't mind.
Further, a filter may be arranged on at least one of the upper surface and the lower surface of the substrate, and the filter may pass through the opening.

The present invention is able to provide a thin container valve that can smoothly discharge the internal fluid to the outside of the sealed container.

1 shows a container valve according to a first embodiment of the present invention, (A) is a plan view of the container valve, (B) is an explanatory view of the central cross-sectional structure, and (C) is the same container 1 is a perspective view of a sealed housing with a valve for cleaning; FIG. FIG. 2 shows a container valve according to a second embodiment of the present invention, where (A) is a plan view and (B) is a central cross-sectional structure explanatory view. FIG. 10 shows a container valve according to a third embodiment of the present invention, where (A) is a plan view and (B) is an explanatory view of the central cross-sectional structure. FIG. 10 shows a container valve according to a fourth embodiment of the present invention, where (A) is a plan view and (B) is an explanatory view of the central cross-sectional structure. FIG. 10 shows a container valve according to a fifth embodiment of the present invention, in which (A) is a plan view and (B) is an explanatory view of the central cross-sectional structure.

Embodiments of the present invention will be described below with reference to the drawings. In the present invention, up, down, front, back, left, and right only indicate relative positional relationships, and do not specify absolute positions. The central cross-sectional structure explanatory diagrams in each figure are for the purpose of explaining the structure, and the dimensions are different from the actual ones.
(Regarding the sealed container 10)

A sealed container 10 according to the embodiment shown in FIG. 1 has a sealed structure in which an upper open end of a rigid container body 11 and a flexible cover sheet 12 are bonded together. In the sealed container 10, foods such as miso, coffee beans, etc., which generate fluids such as substrates can be suitably stored, but other contents may also be stored. . Further, the closed storage body 10 may be made of a plastic bag or the like having flexibility as a whole, or may be made of a hard material as a whole.

A container valve 13 is affixed from the outside so as to block a hole 14 formed in the sealed container 10 (cover sheet 12 in this example). The container valve 13 controls the flow of fluid such as gas generated from the contents passing through the hole 14 .
(Outline of container valve 13)

The container valve 13 includes a base material 20 having a base sheet 21 formed in such a manner as not to block the hole 14 of the closed container 10, a first valve film 31 superimposed on the base material 20, a first and a second valve film 32 superimposed on the valve film 31 . As described above, the container valve 13 is composed only of a sheet or film, and its thickness is extremely thin compared to valves in which a resin molded product is used as part of the valve body.
(Regarding base material 20)

The base material 20 comprises a flexible base material sheet 21 and pressure-sensitive adhesive layers 22 formed on both upper and lower surfaces thereof, and an opening 23 penetrating vertically is formed substantially in the center thereof. In this example, the base material 20 has a rectangular shape and the opening 23 has a circular shape, but the shape and size can be changed as appropriate. In addition, the position where the opening 23 is formed may not be in the center of the base material 20 but may be biased toward the front, back, left, or right. It must match the hole 14.

The pressure-sensitive adhesive layer 22 has stickiness or adhesiveness, and if it ensures sealing between the first valve film 31 or the second valve film 32 in contact with the pressure-sensitive adhesive layer 22 and the substrate 20, , can be adopted and implemented regardless of the properties and names of the materials. The pressure-sensitive adhesive layer 22 needs to be formed only around the openings 23 on both the upper and lower surfaces of the base sheet 21, but it is advantageous in terms of production efficiency to form the pressure-sensitive adhesive layer 22 over substantially the entire surface.
(Regarding the first valve film 31)

The first valve film 31 can be implemented by a film made of one or several layers made of synthetic resin, and in the example of FIG. Also, the first valve film 31 may be arranged on both the left and right sides of the opening 23 as shown in FIGS. In these examples, the left and right sides of the base sheet 21 have substantially the same size and shape, but different sizes and shapes may be used. Moreover, when the first valve film 31 is arranged on both the left and right sides of the opening 23, the shapes and sizes of the first valve films 31 may be different from each other.
The first valve film 31 is adhered and adhered to the substrate 20 via the adhesive layer 22 at the contact surface (lower surface in this example) with the adhesive layer 22 of the substrate 20 .
(Regarding the second valve film 32)

The second valve film 32 can be implemented by a single layer or several layers of synthetic resin film, which overlaps the opening 23 and its surroundings and at least a portion of the first valve film 31 .

In the example of FIG. 1, it is overlaid on the upper surface of the first valve film 31 and over the opening 23 and its surrounding portions where the first valve film 31 is not overlaid. In the portion around the opening 23 where the first valve film 31 is not superimposed, the second valve film 32 has a contact surface (lower surface in this example) with the adhesive layer 22 of the substrate 20 . It adheres and adheres to the base material 20 via the .

The same applies to the examples shown in FIGS. 2 and 3 in which the first valve films 31 are arranged on the left and right sides of the opening 23 . In this case, the lower surface of the second valve film 32 is adhered and adhered to the substrate 20 via the adhesive layer 22 .
(About self-adhesive strength)

The first valve film 31 and the second valve film 32 are detachably adhered to each other by self-adhesion of the films. In this case, either one of the first valve film 31 and the second valve film 32 may have self-adhesion, or both may have self-adhesion. If either one of the first valve film 31 and the second valve film 32 is composed of a single layer, the whole is composed of a self-adhesive layer. Alternatively, it can be implemented by placing a self-adhesive layer on the contact surfaces of both films.

The self-adhesive force is smaller than the adhesive force of the adhesive layer 22 of the base sheet 21, and peeling and adhesion are caused by an increase and a decrease in fluid pressure such as gas generated from the contents in the sealed container 10. It is suitable that the adhesive strength is such that the As a result, when the internal pressure of the sealed container 10 increases, the first valve film 31 and the second valve film 32 are separated from each other. The self-adhesive force maintains a state in which the passage of the fluid is suppressed due to the adhesive state between the two.
(Regarding the seal portion 33)

In this embodiment, seal portions 33 for sealing the first valve film 31 and the second valve film 32 to each other are formed on both upper and lower sides of the opening 23 . The fluid that has entered between the first valve film 31 and the second valve film 32 from the opening 23 may be allowed to flow out from the entire circumference without forming the seal portion 33 . By forming the , the fluid can be guided in a certain direction (directions of arrows in FIGS. 1 to 3) to flow out. Alternatively, the fluid flow may be controlled by forming an independent seal such as a point seal.

It is sufficient for the sealing portion 33 to seal the first valve film 31 and the second valve film 32, but if three sheets/films including the substrate 20 are sealed, these sheets can be sealed.・It is advantageous in that careless peeling of the film can be suppressed. Such a sealing portion 33 can be implemented, for example, by thermal welding by heat sealing, but may be implemented by other sealing means.
(Regarding the valve passage 34)

The valve passage 34 is a channel that opens and closes with the self-adhesive force between the first valve film 31 and the second valve film 32 . In the illustrated example, the valve passage 34 is regulated to extend in the left-right direction by forming seal portions 33 on both upper and lower sides. Therefore, in this example, the valve passage 34 is provided with an open port 35 that opens to the outer end of at least one of the right and left sides of the first valve film 31 and the second valve film 32, and the container valve 13 external to the
As a result, the fluid in the sealed container 10 passes through the hole 14 , the opening 23 and the valve passage 34 and flows out from the opening 35 .
(Regarding the overlapping portion 41)

At least a portion of the inner edge of the first valve film 31 constitutes an overlap portion 41 that overlaps the opening 23 in plan view. On the other hand, the second valve film 32 is adhered to the substrate 20 by the adhesive layer 22 at least in the opening 23 and its periphery where it does not overlap the second valve film 32 and is in contact with the substrate 20. , and the passage of fluid from this portion tends to be suppressed.

Therefore, the overlapping portion 41 serves as an introduction port to the valve passage 34 , and fluid does not flow into the valve passage 34 from portions other than the overlapping portion 41 . As a result, the size of the introduction port to the valve passage 34 can be adjusted by simply adjusting the size of the overlap portion 41 by shifting the first valve film 31 or the like without changing the configuration of other portions. can be set.
In addition, when the fluid flows out from the introduction port of the overlapping portion 41 to the valve passage 34, the second valve film 32 separates from the first valve film 31 and lifts upward. Adhesion between the two-valve film 32 and the substrate 20 may be peeled off. Therefore, providing the seal portion 33 is advantageous in that it is possible to prevent the peeling from spreading to the edge of the second valve film 32 and short-circuiting the fluid.

As shown in FIGS. 2 and 3, when the first valve film 31 is arranged on both the left and right sides, the sizes of the overlapping portions 41 may be the same, or may be different. In the illustrated example, since the size of the overlapped portion 41 on the right side is made small, more fluid from the opening 23 tends to flow into the valve passage 34 on the left side, and the valve passage 34 on the right side is used as an auxiliary valve passage. It becomes a flow path.
(Embodiment of FIG. 3)

In the embodiment shown in FIG. 2, the seal portion 33 is straight extending in the left-right direction and has a uniform width.
On the other hand, in the embodiment of FIG. 3, the interval between the upper and lower seal portions 33 is changed. Specifically, the vertical width of the central portion in the horizontal direction is made larger than that of the other portions. As a result, the valve passage 34 is larger in the vicinity of the inlet to the valve passage than in other portions, and serves the function of a fluid reservoir. That is, the fluid that has flowed in from the opening 23 exceeds the self-adhesive force in a state where it is accumulated near the introduction port to the valve passage and the pressure is increased, and the flow path of the valve passage 34 is opened to flow out from the opening 35. do.

Further, in the embodiment of FIG. 3, the first valve film 31 and the second valve film 32 are stretched longer than the base material 20 in the left-right direction. As a result, the first valve film 31 and the second valve film 32 are in a free state in which the outer ends (near the opening 35) are not adhered by the adhesive layer 22 of the base sheet 21, and the valve passage 34 in this free state is allows for more sensitive valve film movement.
(Embodiment of FIG. 4)

In the embodiment of FIG. 4, a third valve film 43 is interposed between the first valve film 31 and the second valve film 32 . As a result, at least one of between the first valve film 31 and the third valve film 43 and between the second valve film 32 and the third valve film 43 forms the valve passage 34. becomes. In other words, at least one of the first valve film 31 and the second valve film 32 and the third valve film 43 are releasably adhered to each other by self-adhesion of the films.

In the figure, the space between the second valve film 32 and the third valve film 43 is on the upstream side, and the two valve films are closed by a fixing portion 44 that is adhered or adhered to each other. As a result, only the space between the first valve film 31 and the third valve film 43 becomes the valve passage 34, which serves as a flow path for the fluid. Conversely, the first valve film 31 and the third valve film 43 may be closed by the fastening portion 44 .

In the illustrated example, the downstream end (outer end) of the third valve film 43 is shorter than the downstream ends (outer ends) of the first valve film 31 and the second valve film 32 . That is, at the open port 35 at the downstream end (outer end) of the valve passage, only the first valve film 31 and the second valve film 32 are present, and the third valve film 43 is upstream of the open port 35. It ends where it entered. This makes it possible to more effectively suppress backflow. Specifically, when a reverse flow of fluid tries to flow in from the opening 35, the first valve film 31 and the second valve film 32 are separated, and the valve passage 34 widens. The fluid is separated into the first valve film 31 side and the second valve film 32 side by the third valve film 43 and flows upstream. As a result, the third valve film 43 is pressed against the other valve passage 34 side (the first valve film 31 side), and the other valve passage 34 is closed by the third valve film 43 . will be In the previous embodiment in which the third valve film 43 was not used, backflow was suppressed by self-adhesive force. is suppressed.
(Embodiment of FIG. 5)

When implementing the present invention, other sheets or films may be added in addition to the above examples. For example, although illustration is omitted, a covering sheet may be arranged on the upper surface of the second valve film 32 for the purpose of protecting the internal valve structure. Further, in order to prevent the fine powder from the container in the sealed container 10 from flowing into the valve passage 34 and impairing the valve function, a filter 45 may be added. . This filter 45 can be arranged on at least one of the upper surface and the lower surface of the substrate 20 .

The embodiment of FIG. 5 is an example implemented by adding a filter 45 to the upper surface of the substrate 20. Specifically, the filter 45 is arranged between the upper surface of the substrate 20 and the first valve film 31. , the fluid passing through the opening 23 is filtered by the filter 45, and fine powder or the like from the sealed container 10 is prevented from flowing into the valve passage 34 and impairing the valve function. .
As described above, the present invention can be modified in various ways without departing from the scope of the invention.

10 Closed container 11 Container main body 12 Lid sheet 13 Container valve 14 Hole 20 Base material 21 Base material sheet 22 Adhesive layer 23 Opening 31 First valve film 32 Second valve film 33 Seal part 34 Valve passage 35 Opening 41 Overlap portion 43 Third valve film 44 Fastening portion 45 Filter

Claims (5)

A container valve that is attached so as to close a hole in a closed container and that controls the flow of fluid passing through the hole,
A base material having an opening formed without blocking the hole, a first valve film superimposed on the base material, and a second valve film superimposed on the first valve film,
At least around the opening, the base material has tackiness or adhesiveness on both upper and lower surfaces,
Sealability is ensured between the sealed container and the base material and between the base material and the first valve film by the adhesiveness or adhesiveness of the base material,
The first valve film and the second valve film are detachably adhered to each other by the self-adhesion of the films,
When the internal pressure of the sealed container rises, the valve passage between the valve films in the adhesive state due to the self-adhesive force is opened to deaerate, and when the internal pressure of the sealed container drops, the valve passage closes. A container valve characterized by: The first valve film is arranged on at least one of the left and right sides of the opening,
A sealing portion for bonding the first valve film and the second valve film is formed on both upper and lower sides of the opening,
The valve passage is a valve passage between the seal portions, and is provided with an open port that is open to at least one of the right and left outer ends of the first valve film and the second valve film and communicates with the outside. ,
2. The container valve according to claim 1, wherein said fluid in said sealed container is degassed to the outside through said hole, said opening, said valve passage, and said opening. . At least part of the inner edge of the first valve film constitutes an overlapping portion that overlaps with the opening,
The second valve film adheres to the base material in a portion not overlapping the first valve film in the opening and its periphery,
3. The container valve according to claim 2, wherein said overlapping portion forms an opening to said valve passage, and fluid flows from said opening of said overlapping portion to said valve passage. A container valve that is attached so as to close a hole in a closed container and that controls the flow of fluid passing through the hole,
a base material having openings formed without blocking the holes; a first valve film superimposed on the base material; a second valve film disposed on the first valve film; a third valve film inserted between the first valve film and the second valve film;
At least around the opening, the base material has tackiness or adhesiveness on both upper and lower surfaces,
Sealability is ensured between the sealed container and the base material and between the base material and the first valve film by the adhesiveness or adhesiveness of the base material,
At least one of the first valve film and the second valve film and the third valve film are detachably adhered to each other by self-adhesion of the films,
When the internal pressure of the sealed container rises, the valve passage between the valve films in the adhesive state due to the self-adhesive force is opened to deaerate, and when the internal pressure of the sealed container drops, the valve passage closes. A container valve characterized by: A filter is arranged on at least one of an upper surface and a lower surface of the base material, and the fluid passing through the opening is filtered by the filter. 5. The container valve according to any one of 4.

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