JPH0624443A - Manufacture of stay-on tub - Google Patents

Abstract

PURPOSE:To take out a take-out piece easily from a tab, and to make it collectable by a method wherein a movable piece is placed in a finger hole of the tab provided to a can lid, and the take-out piece is made by pressing the aforementioned movable piece. CONSTITUTION:A pellet-like piece S (shown in two-dot chain line in the attached figure) in spherical, cylindrical or square column shape is placed in a finger hole 8 of a tab 40 fixed to a can lid 1, and the piece S is made flat by pressing at normal temperature applied from above with a punch, and thereby a thin disk-like take-out piece 41 is formed. During the process of the above-mentioned pressing, side edges of the take-out piece 41 are inserted under the finger hole 8 and are caught between the edges of the finger hole 8 and the surface of the can lid 1, and thereby the take-out piece 41 is fixed to the can lid 1. When a pull-out part 7 is pulled up on occasion of drinking and a scored part 3 is opened, the take-out piece 41 is released from catching and the take-out piece 41 is made removable from the tab 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a can-ion open tab attached to a can lid of a beverage can or the like.

[0002]

2. Description of the Related Art In recent years, the open can portion of a can lid such as a beverage can has been
In order to prevent various harmful effects caused by discarding the tab after opening the can, a so-called Steion tab in which the tab and the can lid are partially connected even after the can is opened is being adopted.

FIG. 4 shows an example of an aluminum alloy can lid in which such a Stein tab is used. In this example, a substantially U-shaped cut line 2 is formed on the surface of the can lid 1. Is formed to define the score portion 3, and a Stein tab (hereinafter abbreviated as a tab) 4 is joined to one end side of the score portion 3 via a rivet 5.

Here, the tab 4 has a push-down portion 6 formed on one end side thereof so as to overlap with the score portion 3, while a pull-up portion 7 for hanging an operator's fingertip on the other end side thereof. The finger hole portion 8 is formed between the pulling portion 7 and the rivet 5 to improve the operability when opening the can.
The pull-down portion 6 pushes the score portion 3 downward by pulling the pull-up portion 7 upward, whereby the score portion 3 cuts the score line 2.
The can lid 1 is opened by being bent downward while being torn against.

The tabs are usually formed by punching an aluminum alloy base plate except a part of the tab, conveying a part of the base plate in a continuous state with the base plate, and cutting off the connecting portion in a predetermined process. Manufactured by separating from the plate. Here, the finger hole portion 8 is formed by punching out the portion and curling the peripheral edge.

By the way, in a conventional beverage can using a tab of a type that is detached from the can lid (that is, a type that is not the Steion type), as a part of so-called sales promotion, a predetermined number of detached tab portions (ring pulls) are provided. There were occasions such as campaigns to give gifts to consumers who collected (about 10 pieces) and sent to manufacturers.

However, in the Steion type tab, since the tab is fixed to the can lid, it is not possible to collect only the tab and the sales promotion as described above cannot be performed. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method of manufacturing a tab which is of the steion type but is partially recoverable. It is a thing.

[0009]

According to a first aspect of the present invention, there is provided a tab manufacturing method, wherein a piece having plasticity is placed in a finger hole portion, and then the piece is pressed and flattened for removal. A piece is formed and the detachable piece is attached to the finger hole portion.

[0010]

According to the method of manufacturing a tab of the present invention, it is possible to manufacture a tab that can be collected by removing the detachable piece from the finger hole portion.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the structure of a tab 40 according to an embodiment of the present invention will be described with reference to FIGS. The same components as those of the conventional tab 4 described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The tab 40 of this embodiment is different from the above-described conventional tab 4 in that a thin disk-shaped removal piece 41 is attached to the lower surface of the peripheral edge of the finger hole portion 8. .

As the material of the detachable piece 41, a synthetic resin such as hard polyethylene or polypropylene is used.

Further, the removing piece 41 and the tab 40 are
The side edge of the detaching piece 41 is fixed by being sandwiched between the peripheral edge of the finger hole portion 8 and the can lid 1, and the pulling portion 7 of the tab 40 is pulled up (that is, the score portion 3 is pushed down to open the can. By doing so, the detaching piece 41 can be detached from the tab 40.

The removal piece 41 is provided with a stamp (not shown) made of characters or figures for sales promotion. The other structure is the same as that of the conventional tab 4, and the description thereof will be omitted.

Next, a method of manufacturing the tab 40 of this example will be described.

First, after fixing the tab 40 to the can lid 1 in the same manner as in the conventional case, the tab 40 is fixed in the finger hole portion 8 thereof.
A piece S (two-dot chain line in the figure) formed in the shape of a pellet such as a sphere, a cylinder, or a prism is placed, and then the piece S is pressed from above by a punch at room temperature. The flattened thin disk-shaped removal piece 41 is formed.

By this pressing step, the side edge of the detachable piece 41 is made to enter below the finger hole portion 8 and the side edge is sandwiched between the side edge of the finger hole portion 8 and the surface of the can lid 1. The removal piece 41 can be fixed to the can lid 1.

In addition, in the tab 40 of this embodiment, a stamp is formed on the detachable piece 41 by cold or hot pressing at the time of pressing the element S or at a step after this processing. .

Then, in the same manner as the conventional one, the tab 4 of this example is used.
The can lid 1 with the fixed 1 can be attached to the can body to manufacture a beverage can or the like.

According to the tab 40 of this example, by pulling up the pulling portion 7 (that is, opening the score portion 3), the removal piece 41 is released from the holding portion 7 and the can lid 1, and the removal piece 41 is removed. Can be easily removed from the can lid 1 and the tab 40. Therefore, there is an advantage that only the detachable pieces 41 can be collected in a state of being separated from the can lid 1, and a sales promotion can be performed in the Stein type tab.

Further, in the tab 40 of this example, the removal piece 41
Since the stamp is formed on the plate, it is possible to confirm that the removal piece 41 is obtained from a specific can, and there is also an advantage that it is possible to prevent misidentification or forgery.

Next, a modification of the tab manufacturing method according to the above-described embodiment will be described.

In the method of the above-mentioned embodiment, after the tab 40 is attached to the can lid 1, the piece S is pressed to remove the piece 4.
1 is attached to the finger hole portion 8,
In the method of the modified example, the finger holes are attached before the tab 40 is attached to the can lid 1, for example, before the tab 40 is cut off from the aluminum alloy raw plate or after the tab 40 is cut off from the raw plate. The piece S is placed in the portion 8, and in this state, the piece S is pressed to remove the piece 4
1 is formed, and the side edge of the removal piece 41 is brought into contact with the inner peripheral edge of the finger hole portion 8 to remove the removal piece 4
1 may be attached to the finger hole portion 8. Here, when the detaching piece 41 and the finger hole portion 8 have insufficient adhesive force and fall off the finger hole portion 8 from the finger hole portion 8 on the line, after the detaching piece 41 is formed, the vicinity of the surface side edge thereof is formed. It is also possible to apply an adhesive to the adhesive and attach the removal piece 41 and the finger hole portion 8 to each other. As the adhesive used here,
For consumers, the removal piece 41 from the finger hole portion 8
It is preferable that the adhesive has an adhesive strength such that the can be easily removed.

In the method of manufacturing the tab 40 of the above-described embodiment, since the element S is placed on the can lid 1 and then the element S is pressed, the coating film or the surface of the surface of the can lid 1 is pressed. However, according to the method of the modified example, since the removal piece 41 is attached to the tab 40 before the attachment to the can lid 1, there is an advantage that the can lid 1 can be prevented from being damaged. is there.

In addition, in the tab 40 of this example, the removal piece 41 is formed with a stamp by pressing,
For example, a paint may be contained in the element piece S in advance, and a color, a pattern, or the like may be added to the removal piece 41 by this paint, and the removal piece 41 may be specified by this. Furthermore, for example, the removal piece 41 may be specified by molding the removal piece 41 and then coloring it.

Further, in the tab of this example, the removing piece 4
Although the synthetic resin is used as the material of No. 1, other flexible materials such as clay may be used.

[0028]

According to the method of manufacturing a stay tab according to the present invention, a piece is placed in the finger hole portion, and then the piece is pressed and flattened to form a detachable piece. Since the removal piece is configured to be attached to the finger hole portion, it is possible to remove the removal piece from the tab and collect it by using the tab manufactured according to the present invention in the product. The effect is that it can be done on the tab.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a method for manufacturing a steion tab according to the present invention, in a state in which the steion tab is attached to a can lid.

FIG. 2 is a plan view of a steion tub showing an embodiment of a method for manufacturing a steion tub according to the present invention.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of a can lid having a conventional Steion tab attached thereto.

[Explanation of symbols]

 8 Finger hole 40 Steion tab 41 Removal piece S Element

Claims (1)

[Claims] 1. A piece having plasticity is placed in the finger hole portion, and then the piece is pressed and flattened to form a detachable piece, and the detachable piece is attached to the finger hole portion. A method for manufacturing a Steion tab, which is characterized by mounting.