JP2852727B2 - Can cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can cap for closing a drinking mouth by fitting the outer periphery of the drinking mouth on the can side.

[0002]

2. Description of the Related Art
Various can caps have been proposed.For example, such a can cap is fitted to the outer peripheral edge of a drinking can containing a carbon dioxide gas, a fermentation gas, or the like, such as a coke or a beer, and closed and closed. If you keep it, in a few minutes the inside of the can is filled with internally generated gas such as carbon dioxide gas and fermentation gas above a predetermined pressure,
It was found that this gas pressure blows the can cap.

The present invention has found such a problem,
It is to provide a can cap which solves this.

[0004]

The gist of the present invention will be described with reference to the accompanying drawings.

[0005] A cap body 3 which is press-fitted to the outer peripheral edge 2 of the can 1 on the mouth side of the can and which closes the mouth is molded from a flexible resin and conforms to the mouth of the can 1 on the upper surface of the cap body 3. In a can cap having an opening 6 formed at a position to be fitted and a lid 7 detachably fitted to the opening 6, a predetermined communication with the lid 7 communicating with the opening 6 side inside the lid 7 is provided. forming a small hole 11 diameter, the porous material 12 having air permeability on the inner surface of the lid 7 and attached to closing the small hole 11 from the inside of the lid 7, the opening diameter of the small hole 11 and This small hole 11 is
Communication such as the material and thickness of the porous material 12 closed from the inside
Various conditions such as carbon dioxide gas and fermentation gas inside can 1
The cap body is filled with the generated gas more than a predetermined limit pressure.
3 is prevented from being detached from the can 1 by this gas pressure.
Exhaust and high gas pressure close to the predetermined limit pressure
Set to meet ventilation conditions with a sealable property that can be held
The present invention relates to a can cap characterized in that:

[0006]

[0007]

The cap body 3 is press-fitted to the outer peripheral edge 2 of the can 1 to close the drinking port of the can 1.

Since the product of the present invention is molded from a flexible resin, it can be closely fitted and detached. Even if there is some error in the outer diameter dimension of the can 1, the fitting can be closely fitted.

Further, for example, when the product of the present invention is fitted and closed on the outer peripheral edge 2 on the drinking side of a drinking can 1 containing carbon dioxide gas such as cola or beer or a fermentation gas, it is generated in the can 1 Although the internal gas pressure such as carbon dioxide gas and fermentation gas is filled, the internal gas pressure does not reach a limit pressure above which the product of the present invention is desorbed, and the air-permeable porous surface of the lid 7 is formed. It is discharged to the outside of the can 1 through a small hole 11 formed in the lid 7 via the material 12. That is, the product of the present invention is prevented from being detached from the can 1 by this internally generated gas pressure.

Also, since the porous material 12 is attached to the inner surface of the lid 7 to close the small hole 11 from the inside of the lid 7, even if the can 1 is tilted or tilted, the can 1 is removed from the small hole 11. Drinking water inside does not spill out easily.

The ventilation conditions such as the opening diameter of the small hole 11 and the material and thickness of the porous material 12 that closes the small hole 11 from the inside of the lid 7 are set such that carbon dioxide gas or fermentation gas The cap body 3 has an exhausting property for preventing the cap body 3 from being detached from the can 1 by this gas pressure due to the internal generated gas being filled to a predetermined pressure or more, and maintaining the gas pressure at a high gas pressure close to the predetermined limit pressure. It is possible to set so as to satisfy a ventilation condition having a sealability that can be performed, and if set in such an experiment, the gas generated inside the can 1 in which the drinking mouth is closed can be appropriately discharged without excessive escape. Since the gas pressure in the can 1 is maintained at a high gas pressure close to a predetermined limit pressure at which the cap body 3 is detached from the can 1, the drinking water in the can 1 is hardly evacuated even after a lapse of time. And beer) That.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In this embodiment, a step is provided in an inclined fitting portion 5 on the inner surface of a hanging flange portion 4 of a cap body 3 so that an outer peripheral edge 2 of a large diameter can 1 can be obtained.
Large-diameter fitting peripheral portion 5a and outer peripheral edge 2 of small-diameter can 1
And a small-diameter fitting peripheral portion 5b that fits into the can 1 so as to fit into two types of cans 1. FIG. 2 shows a state in which it is fitted to a small-diameter can 1b.

The present invention is not limited to this embodiment, and a step may be further formed so that it can be fitted to three or four types of cans 1 having different diameters, or a simple inclined surface without forming a step. Alternatively, the flexibility of the hanging flange 4 may be used to fit the outer peripheral edge 2 of the can 1 having various diameters. In this case, the lower part of the inclined surface becomes the large-diameter fitting peripheral part 5a, The deviation functions as the small-diameter fitting peripheral portion 5b.

A tubular portion having an opening 6 at the apex is formed upright at a position corresponding to the spout on the upper surface of the cap body 3, and the opening 6 is bent by bending the lid attaching body 8 to form a lid. Body 7
Are formed so as to be detachably and closely fitted.

The lid mounting body 8 of this embodiment is formed by integrally molding the lower edge of the hanging flange 4 on the opening 6 side with resin.

In this embodiment, a small hole 11 communicating with the opening 6 inside the lid 7 is formed at the center of the upper surface of the lid 7,
A porous material 12 having air permeability is provided on the inner surface of the lid 7, and the small holes 11 are closed from the inside of the lid 7.

The small hole 11 is formed so that the opening diameter on the upper surface side of the lid 7 has a diameter of about 0.5 mm. Although the small hole 11 is formed so as to have a larger diameter toward the inner surface side of the lid 7 as shown in FIG. 3, such a small hole 11 is formed by projecting from a resin molding die. When the pin for forming the small hole 11 is a straight rod-shaped pin, the pin is easily damaged by repeating molding, and the diameter becomes larger toward the protruding base side where the small hole 11 can be formed as in the present embodiment. This is because when the pin is protruded, the durability of the pin is improved, the pin is hardly damaged, and the molding die can endure a large number of moldings.

The porous material 12 employs a foamed polyethylene sheet having a thickness of about 1 mm. This foamed polyethylene sheet is a foam having a closed cell structure in which foamed polyethylene beads are extruded into a continuous sheet and foamed 1.5 to 3.0 times, and has gas permeability and low moisture permeability. Features such as. That is, the generated gas inside the can 1 is appropriately ventilated and discharged by the polyethylene sheet, and drinking water hardly penetrates into the polyethylene sheet even when the can 1 is tilted or tilted. The structure makes it difficult for water to spill out.

The opening diameter of the small holes 11 and the material / thickness of the porous material 12 are determined by the fact that the cap body 3 is filled with the gas generated inside the can 1 such as carbon dioxide gas or fermentation gas above a predetermined limit pressure. An experiment was performed so as to satisfy a ventilation condition having an exhausting property for preventing the gas from being detached from the can 1 by this gas pressure and having a sealing property capable of maintaining a high gas pressure close to the predetermined limit pressure. The optimal opening diameter of the obtained small holes 11 and the porous material 12
Material and thickness.

Accordingly, the above-described various ventilation conditions can be realized only by forming a small hole in the lid to prevent the cap body from being detached by the gas generated inside the can. It is not practically inadequate because the gas generated inside the can escapes too much, and if the can is tilted or tilted, the drinking water in the can easily spills out from these small holes. In the embodiment, since the porous material 12 is attached to the inner surface of the lid 7 having the small holes 11 formed therein, the internally generated gas in the can 1 is discharged from the small holes 11 through the porous material 12. An excellent structure that has never been seen before, such that the generated gas inside the can 1 does not escape too much, and even if the can 1 is tilted or tilted, drinking water slightly leaks out of the small holes 11 and hardly spills out. Can be realized.

In the figure, reference numeral 9 denotes a tongue for removing the cap body 3, 9a denotes a hole in which a key-tab-type pull tab trigger can be attached, 10 denotes a tongue for removing the lid 7, and 13 denotes a porous material. A locking projection for locking 12.

[0022]

The present invention is constructed as described above.
For example, when the product of the present invention is fitted and closed on the drinking-mouth-side outer peripheral edge of a drinking beverage containing a carbon dioxide gas or a fermentation gas such as cola or beer, the carbon dioxide gas or a fermentation gas generated in the can can be obtained. The gas generated inside is filled up, but the internal gas pressure does not reach the limit pressure enough to desorb the product of the present invention, and is formed on the lid through the porous material having air permeability on the inner surface of the lid. Since the gas is discharged to the outside of the can from the small holes, the product of the present invention is prevented from being detached from the can by this internally generated gas pressure, and a porous material is attached to the inner surface of the cover to form the cover. Since the small hole is closed from the inside, drinking water in the can does not easily spill out of the small hole even if the can is tilted or tilted. .

The ventilation conditions such as the opening diameter of the small hole and the material and thickness of the porous material which closes the small hole from the inside of the lid are determined by the internal gas generation such as carbon dioxide gas and fermentation gas inside the can. Is vented to prevent the cap body from being detached from the can due to the gas pressure when the gas is filled at or above a predetermined limit pressure, and to have a sealing property capable of maintaining a high gas pressure close to the predetermined limit pressure. It is possible to set so as to satisfy the conditions, and if set in such an experiment, the gas generated inside the can with the drinking port closed will be discharged properly without excessive removal, and the gas pressure in the can will be reduced. Since the cap body is kept at a high gas pressure close to the predetermined limit pressure for detaching the cap body from the can,
It is an excellent can cap that makes it hard to get lost over time and can drink the drinking water in the can (whether it is a cola or a beer) deliciously.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a cross-sectional view showing a used state of fitting to a small-diameter can according to the present embodiment.

FIG. 3 is an enlarged explanatory sectional view of a main part of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Can 2 Outer edge 3 Cap body 6 Opening 7 Lid 11 Small hole 12 Porous material

Claims (1)

(57) [Claims] 1. A cap body which is press-fitted to the outer periphery of the can on the mouth side of the can and which closes the mouth is molded from a flexible resin, and is formed on the upper surface of the cap body at a position corresponding to the mouth of the can. An opening is formed, and in a can cap provided with a lid detachably fitted to the opening, a small hole having a predetermined diameter is formed in the lid, which communicates with the opening side inside the lid. by attaching a porous material having an air permeability on the inner surface of the lid closes the small hole from the inside of the lid, the opening diameter Narabiniko of the small holes
The material of the porous material, which closes the small holes from the inside of the lid,
Ventilation conditions such as thickness can be controlled by using carbon dioxide gas or fermentation gas inside the can.
When the internally generated gas such as
The cap body prevents the gas pressure from detaching from the can.
High exhaust gas that has an exhausting property to stop and is close to the predetermined limit pressure.
To meet the ventilation conditions that have a tight seal that can hold
A can cap characterized in that it is set to: