JP2002080041A - Can lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a can lid which can be pulled up with a finger easily hooked on a holding section of a tab from time to start opening so that it can be easily opened. SOLUTION: The can lid including a panel 3 and a tab 6 has a panel part to be torn when opening a can formed on approximately the same plane as a center part of the panel 3 to which a tongue 12 of the tab 6 is fixed (B part). In addition, the can lid is formed so that the greater part from a pressing portion 10 on a tab periphery to at least the vicinity of the holding section 11 is on approximately the same plane (A part). The tongue 12 comprising a single plate is formed to bend upward to form a space 21 between the pressing portion 10 and the panel 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can lid used for beverages in cans and the like, and more particularly to a technique for easily opening a canion-tub type can lid.

[0002]

2. Description of the Related Art In recent years, from the viewpoints of resource recycling and environmental conservation, a tab having a can lid opening and a broken piece of the opening in which a broken piece is not separated from the can lid have become mainstream. I have. Such a stion type can lid is formed on a panel by pulling up a grip on one end of a tab attached to the panel via a rivet, so that a pressing portion on the other end pushes down the panel and presses down on the panel. The broken score is opened by breaking, and a part of the broken opening piece is folded into the can in a state of being connected to the panel.

By the way, in a conventional can lid of this type, the tab is attached without any gap between the tab and the panel surface, and the pressing of the panel by the pressing portion is started simultaneously with the raising of the grip portion. For this reason, it is necessary to cause the gripping portion with a considerably large force, but there is a disadvantage that the fingers cannot be sufficiently hooked on the gripping portion, and it becomes difficult to open the can lid.

For this reason, the grip portion of the tab is inclined,
There is a case where a gap is formed between the grip part and the panel by providing a concave part on the panel surface below the grip part, but it is not possible to provide a very large inclination or concave part from the viewpoint of the durability of the can lid etc. However, it is not enough to put a finger on the grip. In Japanese Patent Application Laid-Open No. 5-32255, as shown in FIG. 5, the pressing end 51 of the tab is bent upward to separate from the panel surface. With this configuration, at the time of opening, the front end does not receive a reaction force from the panel surface until the bent front end comes into contact with the panel surface, so that the entire front end contacts the panel surface. The gripping portion 52 can be caused with a smaller force than in the case of performing the operation.

However, in this method, since the start of score breaking is performed at the root portion of the bent portion abutting on the panel surface, the reaction force from the panel surface is generated at the same time when the grip portion 52 is caused. There is no difference in joining. In the actual opening work, the workability is the worst when the grip portion 52 starts to be raised (it is difficult to insert a finger between the grip portion and the panel surface). However, the opening is still not easy to open, and there is room for improvement.

Further, instead of bending the end portion 51 on the pressing side of the tab upward, there is disclosed a device in which a concave portion is provided on the panel surface below the end portion, but the same problem occurs.
Providing a concave portion inside the cut score (score) causes distortion in the vicinity of the score, resulting in poor reliability such as the score being easily broken before opening.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can be easily caused by putting a finger on a grip portion of a tab from the start of opening and can be opened very easily. It is an object of the present invention to provide a can lid as described above.

[0008]

For this reason, the invention according to claim 1 comprises a panel for closing an upper opening of a can, a pressing portion for pressing a panel portion broken at the time of opening at one end, and a pressing portion for pressing the panel portion which is broken at the time of opening. It has a grip portion for hanging a finger, an end extending from the pressing portion in the direction of the center of the panel has a tongue piece made of a single plate fixedly joined to the center of the panel, and the peripheral edge is entirely A tab that is reinforced by folding a single plate downward over the circumference, and a panel portion that is broken at the time of opening is substantially the same as a central portion to which the tongue piece of the tab is fixed. The tabs are formed so that most of the tab peripheral edge portion except for the grip portion is substantially flush with the tab, and the tongue is formed so that the pressing portion of the tab has a gap with the lower panel surface. The one part is formed to be bent upward.

The invention according to claim 2 is characterized in that a gap is formed between the grip portion of the tab and the panel. The invention according to claim 3 is characterized in that the end of the tab having the grip portion is bent upward.

The invention according to claim 4 is characterized in that the gap is formed by providing a concave portion in a panel portion below the grip portion of the tab.

[0011]

According to the first aspect of the present invention, the gap between the pressing portion of the tab and the panel is formed by a single-plate tongue piece that has not been subjected to processing such as bending or folding for reinforcement. Since it is formed by bending upward, it is enough to push down the end of the tab on the pressing portion side with an extremely small force enough to elastically deform the tongue piece portion, so that a finger can be hooked on the grip portion. The gap can be formed, and the finger can be reliably hooked on the grip portion from the start of the opening.

As described above, by further pulling up the grip portion with the finger securely held thereon, the pressing portion presses down the panel surface, and at the same time, the fixed rivet can be pulled up and easily opened. That is, when opening the can lid, at the beginning of the opening when the workability is the worst, it is possible to easily and sufficiently raise the gripping portion with one-touch operation, and easily and reliably put a finger on the raised gripping portion, Can be opened.

Further, the panel portion pressed by the pressing portion is formed on substantially the same surface as the tab fixing portion on the panel, and the panel portion is not provided with a special shape such as a concave portion. Thus, it is possible to prevent breakage before opening. Furthermore, since most of the tab peripheral portion except the grip portion is formed so as to be substantially flush with each other, sufficient bending rigidity can be secured against a reaction force from the panel surface,
The breaking force can be reliably applied without being elastically deformed.

According to the second aspect of the present invention, since a gap is also formed between the grip portion of the tab and the panel, the gap is added to the amount caused by the grip portion, and the finger is further applied to the grip portion. It can be easily applied. In addition, it becomes possible to insert a finger from the gap to cause a grip,
Since the force at the start of raising the grip portion can be sufficiently reduced, the opening can be performed by a series of operations as it is.

According to the third aspect of the present invention, a gap can be formed between the grip portion and the panel by bending the end of the tab having the grip portion. According to the invention according to claim 4, by providing the concave portion in the panel portion below the grip portion of the tab, a gap between the grip portion and the panel can be formed. In addition, it may be used together with a configuration in which the end of the tab having the grip portion is bent,
The gap with the panel surface can be made larger.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. As shown in FIGS. 1 and 2, a can lid 1 is provided with a panel 3 having a curling portion 2 for tightening and a score (engraving) 4 forming an opening, and a rivet 5 on the panel 3. And a fixed tab 6.

The score 4 is provided with a connecting portion 9 which is not broken from the panel 3 between the start end 7 and the end 8 thereof.
To the terminal end 8 to form an opening shape. The tab 6 has, at one end thereof, a pressing portion 10 which presses the panel portion surrounded by the score 4 when opened, a grip portion 11 which, at the other end, puts a finger at the time of opening, and a direction from the pressing portion 10 toward the center of the panel. And a tongue piece 12 formed of a single plate and fixed to the center of the panel at an end extending therefrom, and the tongue piece 12 is provided with a gap 21 between the pressing portion 10 and the panel 3.
The rivet 5 is bent upward to form
Is fixed on the panel 3. The rivet may be integrally formed by projecting the center of the panel 3.

The peripheral portion of the tab including the pressing portion 10 and the grip portion 11 is reinforced by folding a single plate downward, so that most portions except for the grip portion 11 are substantially flush with each other. It is formed flat (part A in the figure). The tab 6
A concave portion is provided in a panel portion below the holding portion 11 of
A gap is formed between the grip 11 and the panel 3.

The tongue piece 12 of the tab is connected to the panel 3
Bend in advance before fixing to the panel 3, or bend when fixing to the panel 3 using a jig or the like (for example, the tab 6 is formed by the rivet 5 with the spacer interposed between the grip portion 11 and the panel 3). Is fixed, the tongue piece 12 is bent, and then the spacer is removed to secure the gap 21).

A panel portion (part B in the figure) pressed by the pressing portion 10 at the time of opening is formed on substantially the same plane as the tab fixing surface at the center of the panel. Next, the opening operation of the can lid will be described with reference to FIG. Tab pressing part 1
The end on the zero side is pushed down with one finger (see FIG. 3A). As described above, the gap 21 between the pressing portion 10 of the tab and the panel 3 is formed by bending the tongue piece portion 12 of a single plate, which has not been subjected to processing such as bending or folding for reinforcement, upward. Therefore, the above-mentioned operation can be performed with an extremely small force enough to elastically deform the tongue piece 12.

Then, the grip 11 of the tab is lifted,
A sufficient gap is formed between the panel surface and the grip 11 so that a finger can be hooked (see FIG. 3B).
By inserting the other finger into this gap, the finger can be reliably hooked on the grip portion 11. With the finger securely held on the grip 11, the grip 11 is further pulled up (FIG. 3).
(C)).

As a result, the pressing portion 10 presses the panel surface, and the rivet 5 is raised with the pressing portion 10 as a fulcrum, thereby deforming the panel surface. Further, when the gripper 11 is pulled up, the upward deformation of the rivet 5 and the downward deformation of the panel portion pressed by the pressing portion 10 increase, and the breaking of the score 4 starts (FIG. 3).
(D)).

Here, since most of the tab peripheral portion except the grip portion 11 is formed straight so as to be substantially on the same plane, sufficient bending rigidity can be secured against a reaction force from the panel surface, and the tab is elastically deformed. The breaking force can be reliably applied without the need.
Further, the panel portion pressed by the pressing portion 10 is formed on substantially the same surface as the tab fixing portion on the panel, and since the panel portion does not have a special shape such as a concave portion, distortion near the score is prevented. As a result, it is possible to secure strength and prevent breakage before opening.

Further, the grip portion 11 is pulled up, and the pressing portion 10 pushes down the panel surface further downward, and gradually breaks and opens along the score 4 (see FIG. 3E). Finally, the broken opening piece 31 is folded into the can with the connecting portion 9 connected to the panel 3 and remains, and the opening work is completed by returning the grip portion 11 to the original horizontal position. (See FIG. 3F).

As described above, the finger can be reliably hung on the grip portion 11 of the tab from the initial stage of opening to easily cause the tab, and the opening of the can lid can be made extremely easily.
In addition, since the grip portion is sufficiently lifted by the pressing operation of the end on the pressing portion side performed at the start of opening, it can be said that it is unnecessary to form a gap between the grip portion and the panel surface. Can be added to make it easier to put a finger.

It is also possible to cause a gripping portion while inserting a finger through the gap. Further, in the present embodiment, in consideration of the stability of the tab 6, the pressing portion 10 of the tab is used.
Although a gap 21 is provided only between the panel 3 and the panel 3, FIG.
As shown in FIG. 2, a gap 22 may be provided between the tab gripping portion 11 and the panel 3, and the gap 22 can be further enlarged.

[Brief description of the drawings]

FIG. 1 is a plan view of a can lid according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view for explaining a step of opening a can lid.

FIG. 4 is a sectional view of a can lid according to another embodiment of the present invention.

FIG. 5 is a sectional view of a conventional can lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Can lid 3 ... Panel 4 ... Score 5 ... Rivet 6 ... Tab 10 ... Tab pressing part 11 ... Tab gripping part 12 ... Tab tongue piece

Claims (4)

[Claims] 1. A panel for closing a top opening of a can, a pressing portion on one end for pressing a panel portion broken at the time of opening, and a gripping portion for hanging a finger on the other end, and a center of the panel from the pressing portion. The end extending in the direction of the panel has a tongue piece made of a single plate that is joined and fixed to the center of the panel, and the peripheral edge is reinforced by folding the single plate downward over the entire circumference. A tab portion, wherein the panel portion to be broken at the time of opening is formed on substantially the same plane as the central portion to which the tongue piece of the tab is fixed, and at least from the pressing portion of the peripheral portion of the tab. Most of the tongue portion is formed so as to be substantially flush with the vicinity of the grip portion, and the tongue piece portion is bent upward so that the pressing portion of the tab has a gap with the lower panel surface. Characteristic can lid. 2. The can lid according to claim 1, wherein a gap is formed between the grip portion of the tab and the panel. 3. The can lid according to claim 2, wherein an end of the tab having a grip portion is bent upward. 4. The can lid according to claim 2, wherein a concave portion is provided in a panel portion below the grip portion of the tab.