JPH07172436A - Easily openable can cap - Google Patents

Abstract

PURPOSE:To obtain an easily openable stay-on-tab type can cap which can the completely opened only by pulling up the picking tab without leaving the torn piece of the opening in the can. CONSTITUTION:A first rivet 5 near the center, a second rivet 6 close thereto, and a score 8 which surrounds the first and second rivets 5, 6 and locates in close to the first rivet 5, are respectively provided on a panel 3. The score 8 is not continued from the first rivet 5 to the sides. The picking tab 4 is fixed by a first protruded flap 15 and a second protruded flap 16 flexibly arranged opposite to the first and second rivets 5, 6, so that the finger hook 11 is positioned at the peripheral edge side of the panel 3 having the score 8 and the nose 13 is positioned at the central side on the panel 3 having the score 8. The basal part 16a of the second protruded flap 16 is the folding part at right angles against the pulling up direction of the picking tub 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for sealing canned beer cans, carbonated drinks cans, coffee drinks cans, food cans, etc., so-called stay-on tabs.
The present invention relates to a can lid whose opening is easy.

[0002]

2. Description of the Related Art Recently, a so-called Stein-tab type easy-to-open can in which the tab and the tearing piece are retained on the can lid even after the opening, from the viewpoint of preventing danger by discarding the tab and the tearing piece to the ground after the opening. Lids have become widely used. Currently, this type of can lid that is mainly used practically has a score portion that defines an opening that serves as a drinking mouth, etc., and is formed by leaving a missing portion near the central portion of the panel portion of the lid body. Pull up the handle and press the nose part of the tab to press the panel part inside the score part to be the opening, cut the score part, and then pull back the tab until it is almost parallel to the panel part Had formed. Since the part of the panel portion existing in the opening, that is, the tear piece is connected to the panel body by the missing portion, there is no possibility that the tear piece and the tab are dropped. This kind of easy-to-open can lid requires the double opening and pulling back of the tab before it is fully opened, and the tear piece formed by pressing with the nose part is There is a problem that it may come into contact with the contents of the can and cause discomfort in hygiene.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a can-tab-type easy-to-open can lid in which a complete opening is performed only by pulling up a pick tab and a tearing piece does not enter the can at the time of opening. The purpose is to provide.

[0004]

According to the can lid of the present invention, which is easy to open, a first rivet is formed in the panel portion of the lid main body at the central portion or in the vicinity thereof and is relatively close to the first rivet. A second rivet is formed on the first rivet, and a score portion that defines an opening that serves as a drinking mouth surrounds the first rivet and the second rivet and is formed in the vicinity of the first rivet. In the score part, the part slightly laterally away from the vicinity of the first rivet becomes a missing part and is partially discontinuous, and the grip tab has a grip part around the panel part where the score part is located. A first projecting piece that is flexible and opposed to each other on the first rivet and the second rivet so that the nose part is located closer to the center of the panel part outside the score part The second protrusion is fixed via the second protrusion. Of the base, characterized in that has a fold portion extending in a direction perpendicular to the pulling direction of the knob tab.

At the time of opening, the folds of the base of the second protrusion are extended according to the raising angle of the tab, and when the tab is raised by about 15 to 45 degrees, the folds become substantially flat. It is preferable that the elongation is finished (claim 2).
On the third rivet formed on the panel portion, which is substantially point-symmetrical to the missing portion with respect to the first rivet, on the outside of the score portion, a flexible third protrusion projecting to the outside of the tab is provided. It is preferable that the knob tab is fixed to the grip via the third tab (claim 3).

[0006]

The first rivet is formed in the central portion of the panel portion of the lid body or in the vicinity thereof, and the second rivet is formed relatively close to the first rivet. Is located on the peripheral side of the panel part with the score part,
A first projecting piece and a second projecting piece, which are flexible and face each other with respect to the first rivet and the second rivet, respectively, so that the nose part is located closer to the center of the panel part outside the score part. It is fixed through. Further, a score portion is formed near the first rivet. Therefore, when the handle portion of the knob tab is pulled up, the nose portion presses the portion near the center of the panel portion outside the score portion, and the nose portion serves as a fulcrum to lift the first rivet.
The part of the score portion close to the rivet is cut.

The score section surrounds the second rivet and
Since the base of the protruding piece is a fold that extends in a direction perpendicular to the pull-up direction of the tab, when the pull-up is further advanced, the fold of the base becomes almost flat and the extension is completed. The rivet of No. 1 is started to be lifted, and the breakage of the score part greatly progresses. When the pulling is completed, the score part is also fractured, but the score part is partially discontinuous due to a missing part at a part laterally away from the vicinity of the first rivet, and thus the score part is formed by the opening. The torn piece (the portion corresponding to the opening of the panel portion) is connected to the panel portion through the cutout portion and does not separate from the panel portion. Since the tearing piece is pulled up only and does not enter the can,
There is no danger of contact with the contents and causing discomfort in hygiene.
Further, since the opening of the knob tab is completed by pulling it up once, it is not necessary to do the double work of pulling up the knob tab and then returning it.

When the knob tab is pulled up, the folds at the base of the second protrusion become substantially flat, and when the angle α formed by the knob tab and the panel portion at the end of extension is less than about 15 degrees,
Even if the base becomes almost flat and the extension is finished, the second rivet in the original position prevents further pulling up of the tab, and the nose cannot sufficiently press the panel. Since the part of the score portion close to the rivet No. 1 is not cut, there is a possibility that the opening becomes impossible. However, like the can lid according to claim 2, when the angle α is about 15 degrees or more, the portion of the score portion close to the first rivet is cut while the fold portion is still loose, so that the opening is opened. Satisfied. On the other hand, if the angle α is larger than about 45 degrees, the tear piece will be almost vertical to the panel when pulling up of the tab is completed, and the lip will be placed near the opening to drink directly. When you do, your nose hits the tearing piece and it becomes difficult to drink. However, like the can lid according to claim 2, when the angle α is about 45 degrees or less, the angle between the tear piece and the opening becomes considerably large at the time when the pulling up of the tab is completed, so that the beverage can be drunk. It becomes easier (see FIG. 7).

Like the can lid according to claim 3, the third rivet formed on the panel portion, which is substantially point-symmetrical to the missing portion with respect to the first rivet, outside the score portion is flexible. If the knob tab is fixed via the third protrusion protruding outside of the knob tab, the bending tab protrudes toward the missing portion of the knob tab near the final point of pulling up the knob tab. The gripping tab and the tear strip are diametrically pulled up in a substantially straight line. Therefore, the opening operation becomes stable and the opening becomes easier. It also makes it easier to drink.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes a can lid which can be easily opened before canning and sealing, and comprises a lid main body 2 and a tab 4. A first rivet 5 is formed in the center of the panel portion 3 of the lid body 2, and a second rivet 6 is formed relatively close to the first rivet 5. The score part 8 that defines an opening 7 (see FIG. 7 and FIG. 8) that serves as a drinking mouth, etc., has a substantially oval shape (although the central part has a slightly complicated wave shape) and the first rivet. 5 and the second rivet 6 are surrounded, and one end portion 8a is close to the peripheral portion of the panel portion 3 in a generally symmetrical manner with respect to a straight line connecting the first rivet 5 and the second rivet 6. Is formed. A portion 8b on the center side of the panel portion of the score portion 8 extends in an arc shape along and close to the base portion 5a of the first rivet 5. In the score portion 8, a portion substantially corresponding to the oval-shaped corner portion above the first rivet 5 becomes a narrow cutout portion 9 and is partially discontinuous, and even after opening at the cutout portion 9. Panel part 3 body and tear piece 24
(See FIG. 8).

The grip tab 4 has a grip portion 11 on the outside of the hole portion 12 and a nose portion 13 serving as a fulcrum for facilitating the grip when the grip tab 4 is opened, and the grip portion 11 and the nose portion 13 are provided.
Bridge portion 14 inside the outer edge portion 10 and the hole portion 12 including
Is strengthened by edging or the like to the extent that it is not deformed at least by the pulling force at the time of opening. The grip tab 4 has the first rivet 5 and the second rivet 5 so that the grip portion 11 is located above the panel portion peripheral side of the score portion 8 and the nose portion 13 is located outside the score portion 8. The rivets 6 are fixed to each of the rivets 6 via a first projecting piece 15 and a second projecting piece 16 which are flexible and face each other. A lance cut portion 17 and a lance cut portion 18 are provided on both sides of the first projecting piece 15 and the second projecting piece 16, respectively.
Is formed so that the outer edge portion 10 can move without being obstructed by the first projecting piece 15 and the second projecting piece 16 when being pulled up. Second protrusion 16
The base portion 16a is a fold-shaped chevron portion extending in a direction perpendicular to the pulling direction (in the figure, it has a single-step fold portion, but may be a fold portion having a plurality of tiers), and the chevron portion extends substantially flat during pulling.

The opening of a can 23 (FIG. 3) formed by double-tightening the flange portion of the can body 22 filled with the beverage 20 leaving the head space 21 and the flange portion 2a of the can lid 1 is as shown in FIG. ~ As shown in FIG. 8, it is performed as follows. When the handle portion 11 of the knob tab 4 is pulled up by fingers, the tip of the nose portion 13 comes into contact with the panel portion 3. At this stage, the base portion 16a (the chevron portion) of the second projecting piece 16 has not fully extended (FIG. 4). When the pulling is further advanced, the nose part 13
The tip of the fulcrum serves as a fulcrum to press the panel portion 3 to pull up the first rivet 5 and cut the portion near the portion 8b of the score portion 8 first, but at this stage as well, the base portion 16a of the second protruding piece 16 is cut.
(Crest part) is not fully extended (Fig. 5).

When the pulling is further advanced, the base portion 16a (the chevron portion) becomes substantially flat and the extension is completed, and the second rivet 6 is lifted together with the first rivet 5 (FIG. 6). The rupture of the score portion 8 at the moment when the second rivet 6 is lifted (not shown) extends from the vicinity of the starting point 8x to the peripheral side upper corner 8y (see FIG. 1) of the panel portion 3. There is a slight angle β between the tab 4 and the panel 3.
When the score portion 8 is pulled up to be substantially parallel to the edge portion, the score portion 8 is cut from the upper corner 8y to the vicinity of the terminal end 8z, a complete opening is performed, and the opening portion 7 is formed. However, since the tear piece 24 is connected to the panel portion 3 by the missing portion 9, it does not separate from the can lid 1 (FIGS. 7 and 8). Naturally, the pick tab 4 also does not come off from the can lid 1. As shown in FIG. 8, the tear piece 2 after opening has a slight opening 7 near the missing portion 9.
Leaning against.

The angle α between the tab 4 and the panel 3 when the base 16a is flat (see FIG. 6), that is, the pull-up angle α of the tab 4 is about 15 to 45 degrees, more preferably about 15 degrees. It is desirable that the angle is -30 degrees. When the angle α is smaller than about 15 degrees, the second rivet 6 in the original position prevents further pulling up of the knob tab 4 even if the base portion 16a becomes flat, and the nose portion 13 is moved to the panel portion 3a.
This is because it is not possible to sufficiently press and the portion 8b of the score portion 8 that is close to the first rivet 5 is not cut, so that there is a risk that opening will be impossible. On the other hand, if the angle α is larger than about 45 degrees, at the time when the pulling of the tab 4 is finished (see FIG. 7), the tear piece 24 becomes almost vertical to the panel portion 3 and the lips near the opening portion 7. This is because, when the beverage 20 is directly applied to the subject, the nose hits the tear piece 24, which makes it difficult to drink.

FIG. 9 shows a can lid 31 according to another embodiment of the present invention.
The same reference numerals as those in FIG. 1 denote the same parts. A rivet 32 is formed on the panel portion 3 outside the score portion 8 at a position substantially point-symmetrical to the missing portion 9 with respect to the first rivet 5, and is flexible outside the outer edge portion 10 of the knob tab 4. The structure of the can lid 31 is the same as that of the can lid 1 except that the projecting piece 33 is fixed to the rivet 32. With such a structure, the bending tab 33 suppresses the upward tilting of the tab 4 near the final point when the tab 4 is pulled up, so that the tab 4 is shown in FIG. As you can see,
It is pulled straight up almost diametrically.

The present invention is not limited to the above embodiments, and the missing portion may be located below the first rivet 5 in the vicinity thereof, for example. Further, the nose portion 13 may not have a circular arc shape, but may have an appropriate shape within a range in which the present invention can be carried out, for example, a linear shape. The first rivet may be located near the center of the panel section. Further, the hole 12 is provided for facilitating the picking, and according to the present invention, the opening is completed only by pulling up the picking tab, so that it is not always necessary.

[0017]

According to the can lid of the present invention, which is easy to open, the tab and the tear piece are not separated from the can lid after opening, and the tear tab is completely opened only by pulling up the tab. The effect is that there is no risk of hygiene entering the can and causing health concerns. The invention according to claim 2 has an advantage that the opening by cutting the score portion is surely performed and the beverage becomes easy to drink. The invention according to claim 3 has the advantages that the opening operation is stable, the opening is easier, and the beverage is easier to drink.

[Brief description of drawings]

FIG. 1 is a plan view of a can lid that is an easy-to-open according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the can lid of FIG. 1 taken along the line II-II.

[Fig. 3] Fig. 1 is a canned lid that is double-wound on a can body.
FIG. 3 is a vertical cross-sectional view of an essential part near the can lid of FIG.

FIG. 4 is a vertical cross-sectional view of an essential part showing a state where the nose part is in contact with the panel part by pulling up the knob tab of FIG.

FIG. 5 is a longitudinal cross-sectional view of relevant parts showing a state in which a portion of a score portion along the first rivet is broken by further pulling up of the tab.

FIG. 6 is a longitudinal cross-sectional view of relevant parts showing a state where the pulling of the knob tab is further advanced, the second rivet is lifted, and the breakage of the score portion is greatly advanced.

FIG. 7 is a vertical cross-sectional view of a main portion showing a state where the pulling-up of the tab has been completed and the opening has been completed.

FIG. 8 is a plan view of FIG.

FIG. 9 is a plan view of a can lid which is a second embodiment of the present invention and whose opening is easy.

[Explanation of symbols]

 1 Can Lid Easy to Open 2 Lid Main Body 3 Panel Part 4 Grip Tab 5 First Rivets 6 Second Rivets 7 Openings 8 Score Part 9 Missing Part 11 Handle Part 13 Nose Part 15 First Protrusion 16 Second Projection piece 16a Base portion 31 Can lid with easy opening 32 Third rivet 33 Third projection piece

Claims (3)

[Claims] 1. A first rivet is formed on a panel portion of a lid main body at or near a central portion thereof, and a second rivet is formed relatively close to the first rivet. A score portion that defines an opening that surrounds the first rivet and the second rivet, and is formed adjacent to the first rivet, and the score portion is lateral from the vicinity of the first rivet. The part that is a little away from the score part is discontinuous, and the part is discontinuous.The knob tab is located on the peripheral side of the panel part with the score part, and the nose part is the panel outside the score part. First, so that it is located closer to the center of the part
Fixed to the rivet and the second rivet via flexible and opposed first and second ridges, respectively, the base of the second lug being used to pull up the pick tab. A can lid with an easy opening characterized by a fold portion extending in a direction perpendicular to the direction. 2. At the time of opening, the fold portion of the base portion of the second protrusion is stretched in accordance with the raising angle of the tab, and when the tab is raised by about 15 to 45 degrees, the fold portion is almost closed. The easily opened can lid according to claim 1, wherein the can lid is flattened and stretched.
3. A third panel formed outside the score section on a panel section which is substantially point-symmetrical to the missing section with respect to the first rivet.
The rivet has a third flexible, protruding tab outside the tab
2. The can lid with an easy opening according to claim 1, wherein the pick tab is fixed via the projecting piece.