JPH0744595Y2 - Easy open can lid - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open can lid improved so that the tab lifting performance can be improved.

[0002]

2. Description of the Related Art Generally, as an easy open can lid of this kind, the opening score which is carved in the center panel and has a substantially water-drop shape in plan view is broken by lifting the tab and then pulling the score. The part is completely separated from the can lid, so-called pull-top type can lid and the tab attached to the panel surface are lifted, the opening score engraved on the can lid is pushed and broken, and the tab is lifted as it is and the break progresses. Then, it is roughly classified into a so-called steion type can lid in which the breaking opening generated at that time is further pushed into the can while being connected to the can lid. It should be noted that these lids typically have relatively deep annular grooves formed along the periphery of the center panel that connect to the chuck wall for increased strength and other reasons.

As shown in FIGS. 5 and 6, in order to improve the gripping and lifting performance of the tab 2 regardless of the pull-top type or the steion type can lid,
In the panel portion below the outer free end portion of the tab 2, a finger-holding concave portion 6 having an elliptical or square planar shape is formed.
The gap between the lower surface of the free end of the tab 2 and the surface of the finger hanging concave portion 6 is configured to be as large as possible. (See, for example, Japanese Utility Model Publication No. 63-40439)

Further, in recent years, the diameter of can lids has been reduced in order to save resources, and on the other hand, the plate thickness has been reduced.

[0005]

As described above, with the miniaturization of the can lid, the central panel 1 such as the breaking opening 4, the bead, the finger-holding recess 6, the rivet 5 surrounded by the tab 2, the score 3 and the like. Although miniaturization of each component attached to the surface is required, there is a limit to the miniaturization. In particular, the gap between the free end and the chuck-wall surface of the tab, at a minimum, fingertips interpolation
Even if the space that can be inserted is secured, the space is smaller than usual and it is difficult for the fingers to catch it. In addition, the central panel 1 below the free ends of the tabs 2 for better finger grip.
It is difficult to insert a fingertip into the finger-holding concave portion 6 provided on the surface , and there is a problem that the concave portion 6 does not contribute to the lifting of the tab 2 . In particular, since a relatively large initial opening force is required in the Steion type can lid, improvement in this point is desired.

Regarding the thinning of the can lid, especially when the product such as coffee is a negative pressure can, the central panel 1 is more concave due to the negative pressure action as compared with the conventional can lid having a thick wall. However, there is a problem in that it easily deforms, and the gap between the free end portion of the tab 2 and the surface of the central panel 1 is narrowed so that it is very difficult for a finger to be caught. Also, in the case of the Steion type can lid, the initial opening of the breaking opening 4 is pushed down, and the working point is set so that the depressed breaking opening 4 is sufficiently pushed down and accommodated inside the can. (Tab tip)
Since the distance between the fulcrum and the fulcrum (rivet) is long, the initial opening force and the subsequent opening force are relatively large. Very disadvantageous to

It is an object of the present invention to utilize an annular groove along the periphery of the central panel that connects to the chuck wall as a finger-holding recess to improve finger-holding on the outer free end of the tab and to provide an initial opening. The force is effectively applied to improve the opening efficiency.

[0008]

SUMMARY OF THE INVENTION An arrangement of the present invention which solves the problems of the prior art is to provide a relatively deep annular groove along the periphery of the central panel which connects to the chuck wall and to provide a score for the central panel. In the easy-open can lid in which the breaking opening surrounded by is opened partially by the lever action of the tab, the tab from the annular groove is used.
The concave portion for finger hook extending toward the outer free end portion of the knob is formed.

[0009]

[Function] The annular groove connected to the chuck wall along the peripheral edge of the central panel formed on the can lid can be used as a finger-holding concave portion. The finger can be easily hooked on the free end of the, and the opening efficiency can be improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a can lid of a first embodiment, FIG. 2 is a vertical sectional front view of an essential part of the same, FIG. 3 is a plan view of a can lid of a second embodiment, and FIG. It is a figure.

The structure of the can lid of the first embodiment will be described with reference to FIGS. A is a can lid made of aluminum and a tin material, and the can lid A is configured as follows. By the way, although this embodiment shows a stion type can lid, the gist of the present invention is not only applicable to the stion type can lid, but also applied to a pull top type can lid. Therefore, it is not limited to the example. Further, it is obvious that the present invention can be applied not only to the lid in which the tabs are fixed by the rivets, but also to the lid in which the tabs are fixed by welding or using an adhesive.

As is generally known, the can lid A of this type has a curl portion 11, a seaming panel 12, a seaming panel radius 13, and a chuck wall 1.
4, chuck wall radius 15, annular groove 16,
A central panel 17 is formed.

The central panel 17 has a partially opened break opening 19 surrounded by a score 18.
Is formed. Reference numeral 20 denotes a tab whose middle portion is fixed to the center of the central panel 17 by a rivet 21, and the inner end of the tab 20 overlaps the breaking opening 19, and the breaking opening 19 is formed. An action portion 20a for opening the initial opening and finally pushing the breaking opening portion 19 into a container (not shown) is formed, and the tab 20 is provided with two fingers at the outer free end portion 20b. An opening 20c is provided so that the pad of the finger comes into contact with each other when sandwiched by. In the figure,
22 is a reinforcing bead provided along the outer periphery of the breaking opening 19, and 23 is a panel 1 on both outsides of the score 18.
It is a reinforcing bead symmetrically provided on the 7th part.

As is clear from FIGS. 1 and 2,
Said central panel 17 parts corresponding to the lower portion of the outer free end portion 20b of the tab 20, with allowing insertion of the fingertip, the outer communicates with the annular groove 16, and the central panel 1
The finger-holding concave portion 24 having a surface 24a substantially parallel to the surface 7 is formed. The can lid A of the first embodiment is configured as described above.

Next, the structure of the can lid of the second embodiment will be described with reference to FIGS. The material of the can lid B and the basic structure are the same as those of the above-mentioned can lid A, and therefore, the detailed description thereof will be omitted by attaching the same symbols. The can lid B shown in this embodiment has a tab 2 which can be seen in particular from FIG.
On the central panel 17 part below the outer free end 20b of 0,
Inclined upper direction according to reach from the outside to the internal side, in which the outer ends to form a finger recess 25 having an inclined surface 25a which joins the deepest of the annular groove 16. The can lid B of the second embodiment is constructed in this way.

Although not shown in particular, the inclined surface 25a shown in the second embodiment may be gradually deepened toward the annular groove 16 in some cases. Also, the first and second
In each of the embodiments, the finger-holding recesses 24 and 25 may be formed such that the planar shape thereof becomes wider toward the outside, so that finger-holding can be further facilitated. In addition, by providing a relatively large roundness, that is, a radius, to the bent portions 24b and 25b of the finger hanging concave portions 24 and 25 formed in the central panel 17,
It is also possible to reduce the bead effect of the bent portions 24b and 25b so that the finger-holding concave portions 24 and 25 are absorbed and deformed and do not obstruct the opening before the impact action such as a drop exerts on the tab or the break opening portion. Because it is possible, the finger rest recess 2
The configurations of 4, 25 are not limited to those shown.

[0017]

As described above, according to the configuration of the present invention, the following effects can be obtained. (A) Insert a fingertip between the outer free end of the tab and the finger-holding recess formed in the panel, lift the tab with the rivet as a fulcrum, and use the lever to initially open the tearing plate portion. Or, of course, the partial opening of the Stein type can lid can be achieved. (B) In particular, in the present invention, the outer end of the finger-holding recess is communicated with the annular groove along the peripheral edge of the central panel. So
This existing annular groove can be used as a recess for finger hooking, facilitating finger contact with the outer free end of the tab, improving the opening efficiency, and particularly requiring a relatively large initial opening force. It is suitable for use in a Steion type can lid. (C) Because of the good fingerholding, the miniaturization and thinning of the can lid can proceed effectively, the economic effect can be improved, and easy-open cans with good openability can be widely used.
Moreover, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment can lid.

FIG. 2 is a vertical sectional front view of a main part of the can lid of the first embodiment.

FIG. 3 is a plan view of a second embodiment can lid.

FIG. 4 is a vertical sectional front view of a main part of a can lid of a second embodiment.

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

FIG. 6 is a vertical sectional front view of a part of a conventional can lid.

[Explanation of symbols]

 A Can Lid of First Embodiment B Can Lid of Second Embodiment 11 Curl Part 12 Seaming Panel 13 Seaming Panel Radius 14 Chuck Wall 15 Chuck Wall Radius 16 Annular Groove 17 Center Panel 18 Score 19 Breaking Opening Part 20 Tab 20a Working part 20b Outside free end part 20c Opening 21 Rivet 22 Reinforcing bead 23 Reinforcing bead 24 Recessing part for finger 24a Face 24b Refraction part 25 Recessing part for finger 25a Sloping surface 25b Refraction part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-219745 (JP, A) JP-A 61-69552 (JP, A) Actually opened 54-123952 (JP, U) Actually opened 56- 156723 (JP, U) Actually open 52-136862 (JP, U) Actually open 53-22768 (JP, U) Special public 57-42544 (JP, B2) Actual public 56-39001 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A relatively deep annular groove is formed along the periphery of the center panel that connects to the chuck wall, and the scored break opening in the center panel is partially opened by the lever action of the tab. In the easy-open can lid, the tab from the annular groove
An easy-open can lid characterized in that a finger-holding recess extending toward the outer free end of the is formed.