JP2587404Y2 - Easy open can lid - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open can lid, and more particularly, to an easy-open can lid that is improved so as to easily hold a finger on a tab when partially opening heat-sterilized beverage cans. About.

[0002]

2. Description of the Related Art In general, an easy-open can lid of this type is formed by engraving a score for opening on a central panel portion, and lifting a tab fixed to the broken opening portion by leverage. The so-called pull-top tab type can lid and the tab fixed to the central panel are lifted by breaking the score for the opening and completely separating the broken opening piece generated by pulling the tab as it is from the can lid. Leverage to break the score for opening, further raises the tab to advance the breaking of the score, and pushes a part of the broken opening piece generated at that time into the can while being connected to the can lid , And so-called stion tub type can lids.

As shown in FIGS. 5 and 6, regardless of the pull-top tab type or the stion tab type can lid, between the center panel portion 1 of the can lid and the finger-holding holding portion 2a of the tab 2 Insert the finger and widen the finger clamp 2
a, insert the finger insertion recess 6 into the tab 2
Is formed on the central panel portion 1 below the finger holding portion 2a. (See, for example, Japanese Utility Model Publication No. 63-40439)

[0004]

[Problem to be Solved by the Invention] The central panel portion 1 of the can lid bulges due to the gas pressure of the dissolved carbon dioxide gas, such as canned beer, cola, cider, etc., in which carbon dioxide gas is dissolved. In the case of a so-called positive pressure can, the finger-holding portion 2a of the tab 2 fixed to the central panel portion 1 rises from the outer peripheral portion of the central panel portion 1 to form a finger insertion gap. Pinching is relatively easy,
Further, by forming the finger insertion concave portion 6 in the central panel portion 1 below the finger holding portion 2a of the tab 2 described above,
There is no problem because the finger hooking becomes easier.

However, as in the case of canned coffee, tea, fruit drinks, etc., which are hot-packed and heat-sterilized by retort,
The central panel of the can lid 1
In a so-called negative pressure can, which is recessed from the convex surface so as to be flat or concave, in contrast to the positive pressure can described above, the finger hooking and holding portion 2a of the tab 2 fixed to the central panel portion 1 is formed by the central panel portion. 1 is in close contact with the outer peripheral portion, and a finger insertion gap is not formed.
In particular, in the case of a negative pressure can, if the thickness of the can lid is reduced, the depression of the central panel portion 1 becomes further larger, and it becomes more difficult to pinch a finger on the tab 2, thereby reducing the cost of the can lid. That is, there is a problem that the plate thickness of the can lid cannot be reduced. As described above, it is conceivable to form the finger insertion recess 6 in the central panel portion 1 below the finger holding portion 2a in order to facilitate the insertion of the finger. The depth of the concave portion 6 is naturally limited, and there is a problem that the finger insertion concave portion 6 alone cannot easily hold the finger on the tab 2.

In addition, for example, a regular size (can type 2)
In order to reduce the cost of the can lid of a can having a relatively small can diameter (hereinafter referred to as “small-diameter can”), such as a can having a diameter of “02”, it is conceivable to further reduce the diameter of the can lid. However, since the size of the tab 2 used for the can lid is determined in consideration of its functionality and economy, even if the diameter of the can lid is reduced, the size of the tab 2 must be reduced accordingly. Can not. Therefore, when the diameter of the can lid is reduced, the tab 2
The gap between the end a and the chuck wall surface 1x of the can lid becomes narrow. Therefore, it becomes difficult to insert a finger into this gap.
In addition, in the case of the negative pressure can, as described above, the tab 2 comes into close contact with the central panel portion 1, so that it becomes more difficult to pinch the finger on the tab 2. Therefore, in such a small-diameter can can lid, it is not possible to further reduce the diameter of the can lid or to reduce the thickness of the can lid of the negative pressure can, thereby reducing the cost of the can lid. There is a problem that you can not.

[0007] In particular, in the case of a stern-tab type can lid, in order to partially open, a finger is first inserted into the back surface of the finger-holding portion 2a of the tab 2 and the tab 2 is lifted upward. A force is applied to the action portion 2b of the tab 2 with the rivet 5 as a fulcrum by a lever action, and the applied force is applied as an initial opening force to the break opening portion 4 abutting on the action portion 2b, and The opening score 3 of the opening 4 is broken. Next, by raising the tab 2, the broken opening piece is pushed down into the can, and the tab 2 is an operation point of the tab 2 so that the pushed-down piece is sufficiently pushed into the can. Working part 2b
The distance between the rivet 5 and the fulcrum of the tab 2 is increased. Therefore, a relatively large initial opening force is required when the partial opening is performed.
Therefore, there is a problem that the opening of the can lid cannot be easily performed unless a finger can be easily inserted into the back side of the finger holding portion 2a.

Therefore, in order to facilitate finger-holding of the tab on the finger-holding portion, a lifting means such as a projection is provided in advance on a central panel portion between the finger-holding portion of the tab and the rivet. A can lid can be considered in which the finger-holding-and-holding portion is placed on the means so that the finger-hook holding portion is lifted up to facilitate the insertion of the fingertip.
However, in such a can lid, since the finger-holding portion of the tab is raised and protruded, the stack (stacking) property, stock (storage) property, and transportability of the can lid are significantly impaired.
In addition, careless handling of the can lid may cause breakage of the opening score if force is applied carelessly to the finger-hook pinching part of the tab that is raised and protruding. Also spoils. For this reason, the conventional double wrapping machine for can lids, transfer apparatus, and the like cannot be used as it is, and significant improvements must be made, and there is also a problem that the transportation cost of the can lid increases.

According to the present invention, a conventional apparatus related to a can lid can be used as it is without impairing the stacking property, stocking property, and transportability of the can lid, and a rivet is usually provided on a central panel portion of the can lid. The tab fixed in step 2 is fixed at the position where opening is impossible, and when the can lid is partially opened, the tab is slid from the position where opening is impossible to the position where opening is possible, and is directed in the direction of angular movement. On the tapered long raised bead that has been gradually raised to raise the finger-holding pinching portion of the tab, and to the tab of a small-diameter can or a thin-thick can lid where finger-holding on the tab is not easy. It is an object of the present invention to provide an easy-open can lid that makes it easy to hold a finger.

[0010]

Means for Solving the Problems The object of the present invention is to form a break opening formed by engraving a center panel with an opening score,
In the easy-open can lid which is partially opened by breaking with a tab fastened with a rivet to the center panel portion, the tab is opened from a non-opening position where a symmetric axis of the tab is shifted from a symmetric axis of the breaking opening. The rivet is fixed to the center panel so as to be able to move angularly to the position where the opening can be aligned with the symmetry axis of the rivet, and the angular movement range of the tab, and the intermediate position between the rivet and the finger holding portion of the tab. In the central panel portion, a symmetric axis of the tab is gradually raised in a direction of angularly moving to a position where the tab can be opened, and a tapered elongate ridge for lifting the finger-holding portion of the tab.
Achieved by providing beads . An object of the present invention is to provide an easy-open can lid according to claim 1, wherein a tab stop dimple for preventing the tab from moving in the opposite direction is provided on the side opposite to the direction of angular movement of the tab, and the tapered elongated raised bead. This is achieved by providing a tab-up dimple at the top of the end of the to prevent excessive angular movement of the tab.

[0011]

[Function] When the can lid is partially opened, the tab is
From the opening not position by moving the slide angle to the openable position, gradually increases the tapered provided at the center panel portion
It is placed on a long raised bead and the finger-holding portion of the tab is raised to form a gap that allows finger-holding between the upper surface of the central panel portion and the lower surface of the finger-holding portion of the tab. Even with a thin can lid used for a negative pressure can, it is possible to pinch a finger on a tab.

[0012]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a can lid of the first embodiment, and FIG.
3 is a cross-sectional view taken along the line AA, FIG. 3 is a plan view of the can lid of the second embodiment, and FIG. 4 is a cross-sectional view taken along the line BB of FIG.

The structure of the can lid of the first embodiment will be described with reference to FIGS. A is a can lid made of a metal material such as aluminum and tinplate, and the can lid A is configured as follows. Although this embodiment shows a stion tab type can lid, the present invention relates to a stion tab type can lid.
The present invention is not limited to the can lid of the present embodiment since it can be applied only to the can lid of the type and can also be applied to the can lid of the pull-top tab type.

In the center panel portion 11 of the can lid A, there is provided a break opening portion 13 formed by engraving with a score 12 for opening that partially opens. Reference numeral 14 denotes a tab, which is fixed to the center of the central panel 11 by a rivet 15. At the outer end of the tab 14, a finger-holding portion 14b for holding a finger is held, and at the opposite inner end, the break opening 13 is overlapped.
3 is provided with an opening 14 and an action portion 14a for pushing the opening 13 into a can (not shown). In addition, in order to more reliably hold the tab 14 with a finger, the finger-holding-and-holding portion 14b may be provided with a holding opening 14c in which fingers of the fingers come into contact with each other.
In the drawing, reference numeral 16 denotes a reinforcing bead reinforced by embossing, which is provided in the break opening 13 along the inside of the opening score 12 engraved on the central panel portion 11. Reference numeral 17 denotes a reinforcing bead similar to the above, which is provided symmetrically on the center panel 11 along the outside of the score 12 for opening.

Then, as shown in FIG.
The axis of symmetry a of the tab 14 passing through the center of the rivet 15
20 to the symmetry axis b of the break opening 13 through the center of
It is inclined by 60 °, and only a part of the action portion 14 a provided at the inner end of the tab 14 overlaps the break opening 13.
Therefore, the tab 14 is usually arranged at the position where opening is impossible.

The tab 14 is configured so as to be angularly movable about the rivet 15, and a position where the symmetric axis a of the tab 14 coincides with the symmetric axis b of the break opening 13, that is, the tab 14 Of the breaking opening 1
3 so as to be angularly moved to a position where the opening can be completely overlapped with the opening 3.

The tapered projection for moving the tab 14 from the position where the opening cannot be opened to the position where the opening can be opened and the finger-clamping holding portion 14b of the tab 14 is lifted up is formed on the central panel portion 11 as shown in FIG. The tab 14 is provided at an intermediate portion between the finger-clamping portion 14b of the tab 14 and the rivet 15.
1 is a tapered long raised bead 1 whose back surface is abutted and whose height is gradually increased from a position where opening is impossible to a position where opening is possible.
8 is formed integrally with the central panel portion 11. In the present embodiment, the central panel 11 is used as a projection.
The long raised bead 18 has a bead structure that is integrally formed with a tapered shape and gradually rises from a position where opening is not possible to a position where opening is possible, but a lifting member (not shown) having the same structure is used. The same effect can be obtained even if the can is fixed to the central panel portion 11 by an adhesive means or the like, and is not limited to the can lid of the illustrated embodiment. In this embodiment, the tab 14 is angularly moved clockwise as shown in FIG.
Conversely, the angle may be moved counterclockwise. The can lid A of the first embodiment is configured as described above.

Next, the structure of the can lid of the second embodiment is shown in FIG.
A description will be given based on FIG. The lid material and the basic configuration of the can lid B are the same as those of the above-mentioned can lid A, so that detailed description is omitted by attaching the same reference numerals. The tab 14 at the position where the opening is not allowed has a tapered lower surface as a lifting means.
Because it is in contact with the upper surface of the long elongate raised bead 18,
The can lid B of this embodiment is located on the left side of the tab 14 of the central panel portion 11 because the corner is not inadvertently moved to the openable position, but is easily moved in the opposite direction, ie, counterclockwise in FIG. Stop dimple 19 to lock the side edge of
Was provided. Further, a tab-up dimple 20 for preventing the tab 14 from excessively clockwise moving in the clockwise direction is provided at the end of the tapered long raised bead 18 serving as the lifting means. Further, a recess 21 for finger insertion is formed integrally with the center panel portion 11 below the finger-holding and holding portion 14b of the tab 14 at the position where the tab 14 can be opened, and the finger insertion gap is further widened.
It is designed to make it easier to pinch a finger.

As shown in FIG. 3, 22, 23 and 24 are:
An arrow index of a bead structure in which the center panel portion 11 is embossed.
4 is provided to indicate a direction in which the tab 4 is angularly moved to the openable position, 23 is provided to indicate a direction in which the tab 14 is raised, and 24 is to indicate a returning direction of the tab 14. It is provided in. Each of the arrow indices 22, 23, and 24 corresponds to the center panel 11 as described above.
The embossing provides a reinforcing effect that makes the central panel portion 11 of the can lid B difficult to bend. The can lid B of the second embodiment is configured as described above.

[0020]

[Effect of the Invention] As described above, according to the configuration of the present invention,
The following effects can be obtained.

In the easy-open can lid according to the present invention, the tab is angularly moved from an unopenable position where the symmetry axis of the tab is shifted from the symmetry axis of the break opening to an openable position where the tab coincides with the symmetry axis of the break opening. In order to be able to do so, the center panel is fixed with rivets to the center panel, and the tab is gradually tapered toward the direction of angular movement of the tab on the center panel in the range where the tab moves angularly from the openable position to the openable position. Long ridge
Since the bead is provided, the tab can be lifted sequentially with a small force without difficulty, and a gap can be provided between the lower surface of the finger-holding portion of the tab and the upper surface of the central panel portion. Therefore, even with a small-diameter can, there is an effect that the finger can be easily pinched and held on the tab without damaging the fingertip.

As in the case of canned coffee, juice, tea, etc., the internal pressure of the can is reduced by cooling after heat sterilization of the contents, resulting in a negative pressure. Therefore, the central panel portion of the can lid changes from a convex surface to a flat surface or a concave surface. As a result, the thickness of the can lid can be further reduced, even in a negative pressure can in which the tab and the finger-holding portion of the tab are narrower and the finger-holding on the tab is difficult. This has the effect of providing an easy-to-use, inexpensive easy-open can lid.

The easy-open can lid according to the present invention has a small-diameter can lid with a narrow gap between the tip of the finger-holding / holding portion of the tab and the chuck wall of the can lid, and a Sion-tab-type which requires a relatively large initial opening force. It is suitable for a type of can lid or a negative pressure can using a can lid having a small plate thickness and easily dented by negative pressure.

The protrusion has a tapered shape that gradually increases in the direction in which the axis of symmetry of the tab is angularly moved to a position where the tab can be opened.
The use of the long raised bead facilitates the angular movement of the tab from the non-openable position to the openable position, and provides an easy-open can lid that can be easily opened.

According to the second aspect, the tab stop dimple and the tab up dimple prevent unnecessary angular movement of the tab and can restrict the effective angular movement range with a simple configuration.

[Brief description of the drawings]

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

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

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

FIG. 4 is a sectional view taken along line BB of FIG. 3;

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

FIG. 6 is an enlarged cross-sectional view taken along line CC of a conventional can lid.

[Explanation of symbols]

A Can lid of the first embodiment B Can lid of the second embodiment 11 Center panel part 12 Score for opening 13 Break opening part 14 Tab 14a Working part 14b Finger holding part 14c Holding opening part 15 Rivet 16 Reinforcement bead 17 Reinforcing Bead 18 Tapered long ridged bead 19 Tab stop dimple 20 Tab up dimple 21 Finger insertion recess 22 Arrow index 23 Arrow index 24 Arrow index

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Ito 839-1 Shimuro, Iwatsuki-shi, Saitama Hokkai Seikan Co., Ltd. Technical headquarters (72) Inventor Jiro Arii 6-26 Jingumae, Jingumae, Shibuya-ku, Tokyo No. 1 Kirin Brewery Co., Ltd. (56) References Reference Table 4-506052 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65D 17/00-17/52

Claims (2)

(57) [Scope of request for utility model registration] 1. An easy-open can lid that is partially opened by breaking a break opening formed by engraving with a score for opening in a center panel portion with a tab fastened to the center panel portion with a rivet, Is riveted to the center panel so that the tab can be angularly moved from the non-openable position deviated from the symmetry axis of the break opening to the openable position matching the symmetry axis of the break opening. At the same time, the symmetrical axis of the tab is gradually increased toward the direction in which the symmetrical axis of the tab is angularly moved to a position where the tab can be opened, which is within the angular movement range of the tab, and at the center panel portion at an intermediate position between the rivet and the finger holding portion of the tab. , A tapered elongate raised bead for raising the finger-holding portion of the tab
Easy-open can lid which is characterized in that a de. 2. The easy-open can lid according to claim 1, further comprising a tab stop dimple for preventing the tab from moving in the opposite direction on the side opposite to the direction of angular movement of the tab, and a tapered long ridge. An easy-open can lid having a tab-up dimple at the upper end of the bead to prevent the tab from moving excessively.