JP4156077B2 - Can lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a can lid, and more particularly to a can lid that is provided at an opening of a beverage can and has no score for forming a drinking mouth portion.
[0002]
[Prior art]
Conventionally, metal cans represented by aluminum cans are widely used as cans for various beverages. The can lid of such a beverage can is fixed to the can mouth portion by winding, the drinking mouth portion is partitioned by a score of a predetermined shape, and a metal tab is formed in the portion partitioned by the score Most are riveted structures.
That is, when the tab is lifted by hand or pushed into the can, the score is broken to form a drinking mouth and drink the beverage in the can.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventionally known can lid, when the score is broken to form a drinking mouth, there is a problem that metal powder such as aluminum is generated, and this metal powder falls into the can and is mixed. It is not desirable for hygiene. In particular, when the can lid is formed of a soft material such as aluminum, the tendency of metal powder to be generated is large, which is not preferable for hygiene purposes.
In addition, when a drinking mouth is formed by breaking the score, a sharp cut is formed, which may cause discomfort when the score is broken or when drinking.
[0004]
Accordingly, an object of the present invention is to provide a can lid which can form a drinking mouth without providing a score, and can effectively prevent generation of metal powder due to score breakage and formation of a sharp cut. .
[0005]
[Means for Solving the Problems]
According to the present invention, it comprises a plate-shaped metal lid that is wound and fixed to the can mouth portion and provided with a drinking mouth portion, and a resin stopper for closing the drinking mouth portion of the lid body,
A curl portion is formed at the periphery of the drinking mouth portion of the lid, and the resin plug includes a top plate portion, a circumferential foot portion extending downward from the peripheral portion of the top plate portion, And having a flange portion formed at the lower end of the circumferential foot portion and extending outward,
A locking protrusion is provided on the upper outer surface of the circumferential foot,
The resin plug is fitted into the drinking mouth portion from below, the outer surface of the circumferential foot portion and / or the upper surface of the flange portion and the curled portion are in close contact, and the locking protrusion and the curled portion are locked. The resin stopper is fixed to the drinking part ,
A plurality of protrusions are formed on the outer surface of the top plate portion of the resin plug body at regular intervals along its periphery, and the outer end portions of these protrusions are swallowed by the resin plug body. A can lid is provided which is located outside the inner periphery of the curled portion in a state of being fitted and fixed to the mouth portion .
[0006]
In the can lid of the present invention, the resin stopper is fitted and fixed to a drinking mouth portion formed in advance on the metal lid body, and the drinking mouth portion is easily opened by pressing down to drink. be able to. Therefore, since the drinking mouth is not formed by the breaking of the score, there is no possibility of producing metal powder such as aluminum, which is extremely excellent in terms of hygiene.
Further, since the curled portion is formed at the periphery of the drinking mouth portion formed on the metal lid, and there is no sharp cut end, there is no possibility that the user may feel uncomfortable at the time of drinking or the like.
[0007]
Moreover, in this invention, several protrusion is formed in the outer surface of the top-plate part of a resin-made plug body along the periphery at regular intervals. The outer end portions of these protrusions are arranged so as to be positioned outside the inner periphery of the curl portion in a state where the resin stopper is fitted and fixed to the drinking mouth portion. In other words, when the plastic spigot is pushed in and the spout is opened, when there is a large amount of beverage in the can, or when the can is tilted and drunk, the spout is reopened by the top plate of the spigot. There is a risk of being closed. However, if the protrusion as described above is formed on the outer surface of the top plate portion, there is an advantage that it is possible to effectively prevent the protrusion from coming into contact with the curl portion and thereby closing the drinking mouth portion. is there.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below based on specific examples shown in the accompanying drawings.
1 is a side sectional view showing a can lid of the present invention together with a can mouth portion, FIG. 2 is a plan view thereof, and FIG. 3 is a drinking mouth in the can lid of FIG. FIG. 4 is a side cross-sectional view showing a state when the portion is opened and drinking, and FIG. 4 is an enlarged view of a fitting portion between the resin stopper and the curl portion of the can lid of FIG.
[0009]
1 and 2, the can lid is composed of a metal lid 1 and a resin stopper 2.
The metal lid 1 is fastened and fixed to the opening of the metal can 50, and further includes a drinking portion 5 formed in a portion near the peripheral edge. As shown in the figure, a curling portion 6 is formed on the peripheral edge of the drinking mouth portion 5 by curling.
On the other hand, the resin plug 2 extends outwardly formed at the top plate 10, the circumferential foot 11 extending downward from the peripheral edge of the top plate 10, and the lower end of the circumferential foot 11. The band part 14 is extended from the flange part 13, and the front-end | tip part of the band part 14 is stopped by the rivet 16 on the back surface of the metal lid body 1. As shown in FIG. That is, the resin plug body 2 has a structure that is swingably supported on the back surface of the metal lid body 1.
[0010]
In the present invention, a locking ridge 11 a is formed at the upper end of the circumferential foot portion 11, and the outer diameter D of the locking ridge 11 a is set slightly larger than the inner diameter d of the curled portion 6. (Refer to FIG. 3) When the circumferential foot portion 11 is fitted into the curled portion 6 (the drinking mouth portion 5) from below, the drinking mouth portion 5 is completely closed by the top plate portion 10.
Further, a resin cover 20 is provided so as to completely cover the top plate portion 10 that closes the drinking mouth portion 5, and this cover 20 is detachable by engagement with the upper end portion of the curled portion 6. ing.
[0011]
In the can lid having such a structure, the resin cover 20 is removed, and the resin stopper 2 is pushed in this state as shown in FIG. As a result, the mouthpiece 5 is opened and drinking is performed.
[0012]
In the present invention, a plurality of protrusions 21 are formed on the outer surface of the top plate 10 at appropriate intervals along the peripheral edge thereof. That is, as shown in FIG. 3, in the state where the resin plug 2 is pushed down and the spout 5 is opened, it is supported on the back surface of the metal lid 1 in a swingable manner. When there is a large amount of beverage in the can 50 or when the can 50 is tilted for drinking, the drinking mouth 5 may be closed again by the top plate 10 due to the swinging of the stopper 2. is there. However, if the protrusion 21 is formed as described above, the protrusion 21 comes into contact with the lower side of the curled portion 6, so that the trouble that the drinking mouth portion 5 is closed by the top plate 10 is effective. Is prevented. That is, even when the projection 21 is in contact with the lower side of the curl portion 6, Ru der from between the projections 21 is a flow path of the beverage.
[0013]
Therefore, as can be understood from the above description, the plurality of protrusions 21 may be formed at positions that contact the lower side of the curled portion 6 when the pushed-down stopper 2 is raised. is necessary. For example, if the protrusion 21 is formed on the inner side of the peripheral edge of the top plate 10, the protrusion 21 does not come into contact with the lower side of the curled portion 6, so that the drinking mouth 5 is closed. . Accordingly, the outer end portions of the projecting portions 21 arranged in a circumferential shape are positioned outside the inner periphery of the curled portion 6 in a state where the resin stopper 2 is fitted into the drinking mouth portion 5. It is formed. That is, when the drinking mouth part 5 (curl part 6) is circular, the top plate 10 is also circular, and the protrusion 21 is also circular, but the diameter of the virtual circle connecting the outer ends of the protrusion 21 is The diameter is set larger than the diameter of the inner circumference of the curled portion 6.
[0014]
Further, in the present invention, the circumferential foot portion 11 of the plug body 2 is for forming a fitting portion with the curled portion 6, so that the length thereof is about the thickness of the curled portion 6. Good. Further, the locking protrusion 11a formed at the upper end of the circumferential foot portion 11 is configured to be engaged with the curled portion 6, but at the same time, as shown in FIG. It is preferable to form a concave portion 30 having a shape along the outer surface of the curled portion 6 from the portion 11 to the flange portion 13. Thereby, the circumferential leg part 11 and the curl part 6 of the plug body 2 fitted in the drinking mouth part 5 are firmly engaged, the plug body 2 is stably held, and sufficient sealing performance is ensured. can do.
[0015]
In addition, it is preferable that a plurality of minute protrusions 31 are formed on the concave portion 30 on the surface located on the flange portion 13 side. By forming such minute protrusions 31, stress concentrates on the curled portion 6 and the tips of the minute protrusions 31, so that a sufficiently high sealing performance can be ensured. In particular, in the case where the beverage in the can has an internal pressure like carbonated beverages such as cola, it is possible to ensure remarkably high sealing performance.
Further, instead of the microprojections 31, a sealing material made of a soft resin separate from the plug body 2 can be provided in the recess 30.
[0016]
Further, in the present invention, it is preferable that the curled portion 6 is curled upward as clearly shown particularly in FIG. This is because, in the structure curled downward, the tip portion 6a to which no paint is applied comes into contact with the can content liquid, so that the content liquid may be altered.
Further, it is desirable that the tip end portion 6a of the curled portion 6 is rounded inward so as not to be exposed to the outside. This is because if the tip portion 6a is exposed to the outside, there is a risk that the user may feel uncomfortable during drinking and the like.
[0017]
Such a can lid of the present invention is easily formed by molding a resin stopper 2 by injection molding or the like, and riveting the resin stopper 2 to a metal lid 1 formed by punching or curling. The can lid is put to practical use by being fastened and fixed to the opening of the beverage can.
[0018]
In this can lid, the material for forming the resin stopper 2 is not limited to this, but for example, olefin resin such as polyethylene, polypropylene, propylene-ethylene copolymer, propylene-butene 1 copolymer, Various plastics such as acrylonitrile-styrene-butadiene (ABS) resin, impact-resistant styrene resin, acrylic resin, and nylon resin are used, and high-density polyethylene, polypropylene, and the like are particularly preferably used.
Moreover, as a metal raw material which forms the metal-made cover body 1, light metals, such as surface untreated steel (black plate), surface treated steel, and aluminum, are used suitably. As surface-treated steel, chemical treatment such as phosphoric acid treatment and chromic acid treatment, chemical treatment such as electrolytic chromic acid treatment, electrolytic plating treatment such as electrolytic tin plating, electrolytic galvanization and electrolytic chrome plating, molten aluminum And those subjected to hot dip plating such as hot dip tin plating and hot dip tin plating. Of these, aluminum and aluminum alloys are particularly suitable. The inner surface of the metal lid 1 is preferably painted with an appropriate protective paint.
[0019]
In the above-described specific example, the structure in which the band portion 14 extending from the flange portion 13 is fixed to the back surface of the metal lid 1 with the rivet 16 is shown. However, the resin plug body 2 is not necessarily the rivet 16 or the like. There is no need to fix. However, when the plug body 2 is not fixed to the lid body 1, the plug body 2 may be reversed when drinking, so that a protrusion similar to the protrusion 21 is formed on the lower surface of the flange portion 13. It is preferable to provide a plurality.
[0020]
【The invention's effect】
In the can lid of the present invention, the drinking mouth is formed in advance on the metal lid, and the score is not broken in order to form the drinking mouth. Therefore, there is no generation of metal powder due to score breakage and it is extremely hygienic.
In addition, since the curled portion is formed at the peripheral portion of the drinking mouth formed in advance, the sharp metal end portion is not formed, and there is no possibility of giving the user unpleasant feeling.
Further, a resin stopper is fitted and fixed to the drinking hole formed in advance, and the drinking hole can be easily opened by pushing the stopper.
The can lid of the present invention is particularly useful as a can lid for aluminum beverage cans filled with carbonated beverages such as cola.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a can lid of the present invention together with a can mouth portion.
2 is a plan view of the can lid of FIG. 1. FIG.
3 is a side cross-sectional view showing a state when the resin lid is pushed down to open the drinking mouth part and drink in the can lid of FIG. 1. FIG.
4 is an enlarged view showing a fitting portion between a resin plug body and a curled portion of the can lid of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Metal cover body 2 ... Resin plug body 5 ... Drinking mouth part 6 ... Curl part 10 ... Top plate part 11 ... Circumferential leg part 11a ... Locking protrusion 13 ... Flange part 14 ... Band part 20 ... Product made from resin Cover 21 ... Projection 30 ... Recess 31 ... Micro projection 50 ... Metal can

Claims (2)

It consists of a plate-shaped metal lid that is wound and fixed to the can mouth portion and provided with a drinking mouth portion, and a resin stopper for closing the drinking mouth portion of the lid body,
A curl portion is formed at the periphery of the drinking mouth portion of the lid, and the resin plug includes a top plate portion, a circumferential foot portion extending downward from the peripheral portion of the top plate portion, And having a flange portion formed at the lower end of the circumferential foot portion and extending outward,
A locking protrusion is provided on the upper outer surface of the circumferential foot,
The resin plug is fitted into the drinking mouth portion from below, the outer surface of the circumferential foot portion and / or the upper surface of the flange portion and the curled portion are in close contact, and the locking protrusion and the curled portion are locked. The resin stopper is fixed to the drinking part ,
A plurality of protrusions are formed on the outer surface of the top plate portion of the resin plug body at regular intervals along its periphery, and the outer end portions of these protrusions are swallowed by the resin plug body. A can lid characterized by being positioned outside the inner periphery of the curled portion in a state of being fitted and fixed to the mouth portion . Extending from the flange portion is a band portion whose end is riveted to the back surface of the metal lid, so that the resin stopper is swingably supported on the back surface of the metal lid. The can lid according to claim 1.

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