JP4284975B2 - container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container vessel contents while positive pressurization is stored, the container relates in particular that to prevent scattering of the contents of the time of initial opening.
[0002]
[Prior art]
Regular canned coffee is usually vacuum deodorized and nitrogen-substituted. However, in such a method, carbon dioxide gas is generated from the coffee, and at the same time, the scent is scattered and the coffee becomes less scented. Therefore, conventionally, the inside of a container is filled with carbon dioxide gas with dry ice to make positive pressure, preventing the scattering of the scent from the coffee and obtaining a strong scented coffee.
However, since the inside of the can has a positive pressure, coffee powder is blown out together with carbon dioxide gas when opened. In order to prevent this, conventionally, a blowout prevention lid has been devised in which a filter or the like is attached to the opening of the tab (see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 63-144428 [Patent Document 2]
In JP-A-3-133744, these Patent Documents 1 and 2 are provided with a technique for attaching a filter or filter paper to the periphery of the fixed portion of the opening tab that is initially broken, and for preventing gas from being blown out by letting only gas escape during initial opening. Are listed.
[0004]
[Problems to be solved by the invention]
However, in the case of the conventional blowout prevention lid described above, when the opening tab is slowly lifted, the contents can be prevented from being blown out. However, when the opening tab is lifted up vigorously, the filter and lid cannot be removed from the filter. There is a gap between the bodies. There was a problem that the contents were blown out from this gap and the effect of attaching the filter was lost.
[0005]
The present invention has been made to solve the problems of the prior art described above, it is an object of the positive pressure state can be reliably held, moreover container that can prevent blowout of the contents of the time of unsealing Is to provide.
[0006]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, a container body, a blowout prevention lid being seaming fixed to the upper end of the container body, it is detachably attached to cover the container body to prevent closure balloon And an overcap
The blowout prevention lid is a container provided with a metal lid having a partially formed opening, and a resin film attached to the inner surface of the lid and covering the opening ,
The inside of the container becomes a positive pressure due to the gas pressure, and the film expands due to the gas pressure and projects upward from the upper surface of the lid body from the opening, and the opening edge of the opening is curled and turned upward. And
Between the film and the lid inner surface is provided a seal portion surrounding the opening, the seal portion is constituted by a heat seal that thermally welds the film to the lid inner surface,
The film has a configuration in which a PET film is laminated on the inner and outer surfaces of an aluminum foil as a gas barrier layer, and further, a PE layer for heat sealing is laminated on the inner PET film, and the lid is made of a metal material. The inner and outer surfaces are coated with a synthetic resin coating, and the heat sealing PE layer is coated on the outer coating.
The overcap is attached in a state where the cutter is folded as a breaking means for breaking the film, and when opening, the overcap is removed, the cutter is bent inward at the score portion, and protrudes downward. The cap is mounted again and the cutter is pushed into the film of the blowout prevention lid to break through the film and eliminate the positive pressure .
[0007]
Also, the outer diameter end of the film characterized in that it is fixed to the seamed portion of the lid outer edge.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below based on the illustrated embodiments.
FIG. 1 shows a container using a blowout prevention lid according to an embodiment of the present invention.
That is, the container 1 includes a container main body 10, a blowout prevention lid 20 that is fastened and fixed to the upper end of the container main body 10, and an overcap 30 that covers the blowout prevention lid 20 and is detachably attached to the container main body 10. It is the composition provided with.
The container main body 10 is a bottomed cylindrical metal container, and an external thread portion 11 that is screw-engaged with the overcap 30 is formed on the outer periphery of the upper end portion.
[0010]
The blowout prevention lid 20 includes a lid 22 in which an opening 21 is partially formed, and a resin film 23 that is attached to the inner surface of the lid 22 and covers the opening 21. The film 23 and the inner surface of the lid 22 Between the two, a seal portion 24 surrounding the opening 21 is provided. The tightening portion 12 between the outer diameter end portion of the lid body 22 and the upper end of the container body 10 is narrower than the male screw portion 11.
[0011]
The outer periphery of the lid body 22 is circular, and the opening 21 is a concentric circle with the outer periphery of the lid body. The opening edge of the opening portion 21 is an annular curled portion 25 that is turned upward.
The seal portion 24 is configured by heat sealing in which the film 23 is thermally welded to a surface located inside the lid body 22.
The film 23 is composed of a multilayer resin film including a gas barrier layer such as aluminum foil and a resin layer. As the film 23, a film having a sufficient sealing strength is used so that the seal portion 24 does not peel even when the inside of the container body 10 becomes a positive pressure.
[0012]
FIG. 2C shows an example of the layer structure of the lid 22 and the film 23.
In the illustrated example, the lid 22 has a coating material 22b, 22c made of synthetic resin on the inner and outer surfaces of a metal material 22a such as tinplate (SPTE), and a PE layer for heat sealing on the coating film 22b on the outer surface. 22d is coated.
The film 23 has a structure in which PET films 23b and 23c are laminated on the inner and outer surfaces of an aluminum foil 23a as a gas barrier layer, and a PE layer 23d for heat sealing is further laminated on the inner PET film 23b. .
[0013]
The overcap 30 is provided with a cutter 31 as a breaking means for breaking the film 23. In this example, as shown in FIG. 1B, the cutter 31 is mounted on the back of the top plate portion 32 of the cap 30 in a folded state. In this case, first, the overcap 30 is opened, the cutter 31 folded on the inner surface of the owner cap 30 is raised with a nail, and then the overcap 30 is mounted again. At this time, the film 23 is broken by the cutter 31 .
[0014]
In the manufacturing procedure of the container having the above-described structure, the container main body 10 is supplied with dry ice and then filled with contents such as regular coffee, and the blowout prevention lid is tightly sealed while the dry ice is not sublimated.
Thereby, the air in the container is expelled by the carbon dioxide gas to prevent oxidative deterioration of coffee and the like, and when the dry ice sublimates, the inside of the container becomes positive pressure.
The seal portion 24 is pulled toward the opening 21 by the gas pressure, but the gas pressure acts on the film 23 against the back surface of the lid 22 to increase the seal strength of the seal portion 24. 24 peeling is prevented.
[0015]
Moreover, the film 23 expand | swells with gas pressure, and as shown in FIG. 3, it becomes the external appearance protruding above the upper surface of the cover body 22 from the opening part 21. As shown in FIG. The appearance of the expanded container before opening is generally not preferred, but in the case of regular coffee, the appearance of positive pressure is evidence that the scent of the coffee is retained, indicating the appearance of a fresh scented coffee Will be. This overhang is covered by an overcap 30.
[0016]
When opening, the overcap 30 is removed, the score portion 31a of the cutter 31 provided on the top plate portion 32 of the overcap 30 is bent inward to protrude downward, the overcap 30 is mounted again, and the cutter 31 Is pushed into the film 23 of the blowout prevention lid 20.
Thereby, as shown in FIG. 4, the cutter 31 breaks through the film 23, the gas in the container escapes, and the positive pressure is eliminated. Since the damaged portion 23a of the film 23 has the cutter 31, the gas is only released from the gap between the cutter 31 and the damaged portion 23a even if the cutter 31 is opened vigorously, and the coffee powder does not scatter.
Then, by rotating the overcap 30, the cutter 31 cuts the film 23 on the circumference along the opening edge of the opening 21, and the film 23 can be cut over the entire circumference by one rotation. Since the opening area is wide, it becomes possible to lighten a certain amount of coffee with a spoon, and a constant concentration of coffee can always be drunk.
[0017]
The shape of the opening 21 may be a half-moon shape as shown in FIG. That is, an arc portion 21b concentric with the outer periphery of the lid body 22 and a straight portion 21a connecting both ends of the arc portion 21b are provided, and the corner portions of the arc portion 21b and the straight portion 21a have an arc shape.
In this way, the half-moon shape is convenient because the straight portion 21a can be used as a scraped portion of a spoon. The opening of the film 23 in the case of a half-moon shape can cut the film 23 into a semicircular shape along the arc portion 21b of the opening 21 by half-rotating the overcap 30.
After the initial opening, the overcap 30 is attached to close the opening 21. When the overcap 30 is tightened, the top plate portion 32 can be brought into pressure contact with the upper end of the curled portion 25 of the opening portion 21 for resealing.
[0018]
5B and 5C show other examples of film attachment. Among these, (C) is a reference example.
FIG. 5B shows an example in which the outer diameter end of the film 23 is extended to the winding tightening portion 12 and is wound around and fixed to the winding tightening portion 12.
By doing so, it is possible to prevent the seal portion 24 from shifting in the shearing direction, and to enhance the effect of preventing the seal portion 24 from peeling off.
In the reference example shown in FIG. 5C, the outer diameter end portion of the film 23 is wound around the winding portion 12 of the lid 22 in a sealed state without providing the sealing portion 24, and the winding portion 12 is used as the sealing portion 24 . Is .
In the above embodiment, regular coffee is described as an example of the contents, but the present invention can be widely applied to containers filled with very fine powder such as matcha in addition to regular coffee.
[0019]
【Example】
As a prototype lid for the blowout prevention lid, a multilayer film containing aluminum foil was heat sealed inside the glasses lid. The multilayer film had a four-layer structure of a 38 μ PET film layer, a 20 μ aluminum foil, a 20 μ PE layer, and a 30 μ PE layer.
As a positive pressure condition, 2.5 g of powdered dry ice was supplied to an empty can, and then 150 g of regular coffee was charged and immediately wound.
Thereby, the internal pressure of the can became 0.177 to 0.196 MPa (1.8 to 2.0 kg · cm ² ). Thus, even if the inside of the can was at a positive pressure, the positive pressure state was maintained without peeling off the seal portion. Then, the film 23 was swollen by an internal pressure of about 0.2 MPa.
[0020]
FIG. 6 is a comparative view of the tension (height from the flat panel portion 20a) of the blowout prevention lid 20.
The shape of the opening 21 is circular and the opening diameter D is 25φ, 40φ, and 60φ, and the shape of the opening 21 is a half-moon shape as shown in FIG. 5A, and the straight portion 21a and the arc portion 21b. A blowout prevention lid having an interval R of 30 mm was prepared, and the height h at which the film 23 protruded from the upper end of the winding portion was measured as the tension height. When the opening diameter D is 25φ, the tension height h is 0 mm (see FIG. 6A), when 40φ, the tension height h is 4 mm (see FIG. 6B), and when 60φ, the tension height h is 10 mm. (See FIG. 6C.) In the half-moon shape, the tension height h was 5 mm (see FIG. 6D).
[0021]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
According to the present invention, there is provided a lid body that is wound and fixed to the upper end of the container body and partially formed with an opening, and a resin film that is attached to the inner surface of the lid and covers the opening. Since the seal part surrounding the opening is provided between the cover and the inner surface of the lid, the film can be reliably sealed with the film.
Also, when breaking the film, the gas escapes and the positive pressure is eliminated at the moment when the breaker such as a cutter is pierced into the film, but at that moment the portion that was pierced and broken is blocked by the breaker. Thus, only the gas is released from the gap between the breaking means and the break, and the blowout of the contents is prevented by the breaking means that cannot enter the broken portion.
In addition, since the film expands outward due to pressure, it can be confirmed at a glance that the positive pressure state is maintained in the expanded state of the film, which is a proof of maintaining the quality of the contents.
[0022]
Since sheet Lumpur portion is constituted by a heat seal to heat seal the film to cover the inner surface, the seal can be reliably. Furthermore, even if the film is pulled toward the opening due to the pressure in the container, the outer diameter end of the film is fixed to the tightening portion on the outer edge of the lid, so that the shearing force acting on the seal portion is small and peels off. There is no fear.
[0024]
Off Irumu so is a resin film having a multilayer structure including a gas barrier layer, the seal is more reliable.
In addition , since the overcap that covers the blowout prevention cover and is detachably attached to the container body is provided, the expanded portion of the film protruding from the cover body by the positive pressure can be covered together with the reseal after opening.
Further , since the overcap is provided with a breaking means for breaking the film, it is convenient that a knife or the like is not required for opening.
[Brief description of the drawings]
FIG. 1 (A) is a schematic perspective view of a container equipped with a blowout prevention lid according to an embodiment of the present invention, FIG. 1 (B) is a longitudinal sectional view of the overcap of FIG. Fig. (C) is a plan view of the blowout prevention lid of the container of Fig. (A), and Fig. (D) is a back view of the blowout prevention lid of Fig. (A).
2A is a cross-sectional view of the container blowing prevention lid of FIG. 1, FIG. 2B is an enlarged cross-sectional view of the main part of the opening of FIG. 1A, and FIG. It is sectional drawing which shows the layer structure of a body and a film.
3A is a perspective view of a main part in a state where a film of the container in FIG. 1 is expanded, and FIG. 3B is a cross-sectional view of FIG. 3A.
4A to 4C are explanatory views showing an example of opening the blowout prevention lid of the container of FIG.
5A is a plan view showing another example of the opening shape of the blowout prevention lid of FIG. 1, and FIGS. 5B and 5C are other examples of attachment of the blowout prevention lid of FIG. It is a back view which shows a reference example .
6 (A) to 6 (D) are diagrams showing test results comparing film tension when the size and shape of the opening of the blowout prevention lid of FIG. 1 are varied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 10 Container main body 12 Winding tightening part 20 Outflow prevention cover 21 Opening part, 22 Lid body, 23 Film,
23a aluminum foil (gas barrier layer), 24 seal part, 25 curl part 30 overcap 31 cutter (breaking means), 31a score, 32 top plate part

Claims (2)

Comprising a container body, a blowout prevention lid being seaming fixed to the upper end of the container body, and overcap which is detachably attached to the container body covering the blow-out preventing cover, and
The blowout prevention lid is a container provided with a metal lid having a partially formed opening, and a resin film attached to the inner surface of the lid and covering the opening ,
The inside of the container becomes a positive pressure due to the gas pressure, and the film expands due to the gas pressure and projects upward from the upper surface of the lid body from the opening, and the opening edge of the opening is curled and turned upward. And
Between the film and the lid inner surface is provided a seal portion surrounding the opening, the seal portion is constituted by a heat seal that thermally welds the film to the lid inner surface,
The film has a configuration in which a PET film is laminated on the inner and outer surfaces of an aluminum foil as a gas barrier layer, and further, a PE layer for heat sealing is laminated on the inner PET film, and the lid is made of a metal material. The inner and outer surfaces are coated with a synthetic resin coating, and the heat sealing PE layer is coated on the outer coating.
The overcap is attached in a state where the cutter is folded as a breaking means for breaking the film, and when opening, the overcap is removed, the cutter is bent inward at the score portion, and protrudes downward. A container having a configuration in which a cap is attached again and the cutter is pushed into the film of the blowout prevention lid to break through the film and eliminate the positive pressure . The container according to claim 1 , wherein an outer diameter end portion of the film is fixed to a winding portion of an outer edge of the lid body.

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