JPH07132937A - Easy-to-open lid - Google Patents

Abstract

PURPOSE:To obtain an easy-to-open lid for a positive pressure drink can wherein contained drink may not gush out or a pick tab or a tear piece may not separate from a lid body at the time of opening. CONSTITUTION:A panel part 2 is formed with a main score 4 wherein a part opposite to an initial opened part 4a is a cut 5, a first rivet 6 surrounded by a vent score 8 toward the center and a second rivet 7 on a peripheral side. A pick tab 9 comprises an outer tab 10 and an inner tab 11 having a shared handle 12, wherein the outer tab 10 is fixed to the second rivet 7 by a tongue 14, and a nose 13 is positioned outside the initial opened part 4a. The inner tab 11 is fixed to the first rivet 6 by a holding piece 18. A twistable part 15 or a bendable part is formed on a side of the handle 12 with respect to the outer tab 10 and/or the first rivet 6 of the inner tab 11, so chat the inner tab 11 is below the outer tab 10 when the pick cab 9 is pulled up for opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbonated beverage can, a beer can, a liquid nitrogen-filled juice can, and coffee, in which the tab and the tear piece do not separate from the lid body after the score tab is torn to open the score. The present invention relates to a lid having an internal pressure higher than atmospheric pressure, such as a beverage can, which is suitable for positive pressure canned beverages and the like and which is easily opened.

[0002]

2. Description of the Related Art As an easy-to-open lid in which a tab and a tearing piece are difficult to separate from the lid body after opening, as shown in FIGS.
A lid 100 of the type shown in FIG.
69451). In the figure, 101 is a lid body, 1
Reference numeral 02 is a score-like portion that defines an opening. The score part 102 has two ends 102a, and a part between them is a missing part 105. Reference numeral 103 denotes a ring-shaped tab, which is fixed to the rivet 104 of the lid body 101 via the tongue-shaped portion 103a. The head end 102b of the score part is relatively close to the peripheral edge rising part (so-called chuck wall) 101a of the lid body, and the nose part 103b of the knob tab 103 is the head end 102 of the score part.
It extends beyond b to the chuck wall 101a.

At the time of opening, when a finger is inserted into the knob tab 103 and a portion on the left side of the rivet 104 in the drawing is pushed up, the nose portion 103b pushes down a portion of the lid main body immediately thereunder, and at the same time, the rivet 104 is pulled up. Therefore, a shearing force acts on the head end 102b of the score portion, and the head end 102a and the vicinity thereof are broken to perform the initial opening. Subsequently, when the knob tab 103 is pulled up toward the left side of the drawing, the score portion 102 is torn, and a tearing tongue piece (not shown) is formed. Both ends 1 of the score part 102
Since there is a missing portion 105 between 02a, the tearing tongue is connected to the lid body 101 via the missing portion 105 even after the opening is completed, that is, the tearing tongue does not separate from the lid body 101. .

The lid 100 having an easy opening as described above has the following problems. A positive pressure beverage such as a cola beverage is filled leaving a headspace (see 23 in FIG. 7) and the thumb is inserted into the tab 103 to open the canned beverage sealed with the lid 100.
When the can 3 is pulled up, the can tilts so that the head end 102b of the score part faces downward, but since the head end 102a is relatively close to the chuck wall 101a, even if the head is tilted slightly, the bottom surface of the head end 102b can be drunk. Come into contact with. Therefore, the beverage to which the internal pressure is applied is likely to spout from the initial opening portion, which easily causes troubles such as soiling clothes and body.

[0005]

The present invention, when used as a lid for a can of canned beverage filled with positive pressure, has no risk of spouting the content of the beverage even when the can is relatively tilted at the time of opening. An object of the present invention is to provide a lid with an easy opening in which the tab and the tearing piece are not likely to come off from the lid body.

[0006]

A lid with an easy opening according to the present invention is a lid with a knob tab fixed to a panel portion of a lid main body, and the lid portion has a portion facing the initial opening portion. The main score part in the shape of a horseshoe or horseshoe that defines the opening that becomes the mouthpiece that became a missing part, the first score surrounded by the Vent score part on the center side on the radial direction passing through the initial opening A second rivet is formed on the rivet and on the peripheral side proximate to the inner side of the initial opening, and the tab has an outer tab sharing the tab and an inner tab located inside the outer tab. Consists of an annular part including a knob part and a flexible tongue part fixed to the second rivet, the nose part is located outside the initial opening part, and the inner tab is located relative to the head end part. The flexible holding piece located on the side of the knob A twistable portion or a bendable portion is fixed to the first rivet, and a twistable portion or a bendable portion is formed on the side of the first rivet of the outer tab and / or the inner tab, and the pull tab is pulled for opening. When being raised, the inner tab is below the outer tab.

[0007]

7 to 10, which is an embodiment, when the picking portion 12 is raised by a finger, the tongue piece portion 14 and the holding piece 18 are flexible, so that the nose portion 13 and the holding piece 18 thereof, respectively. The portion on the side of the head end 16 is bent so that the outer tab 10 and the inner tab 11 can be easily pulled up. Since the twistable portions 15 and 27 or the bendable portion are formed on the knob portion side with respect to the first rivet 6 of the outer tab and / or the inner tab, the inner tab 11 is pulled up while being below the outer tab 10. Is performed (FIG. 7). If the twistable portion or bendable portion is not formed and the outer tab 10 and the inner tab 11 are on the same plane when pushing up the knob portion, the fulcrum is the nose portion 13, and the force point is the knob portion 12. , The action point becomes the Vent score part 8 surrounding the first rivet 6, and the distance from the fulcrum to the action point cannot be made very short compared to the distance from the fulcrum to the power point, and the leverage effect is weak,
The first rivet and the second rivet must be brought close together because the force required to break the Vent score portion becomes large. However, when pulling is performed while the inner tab is below the outer tab, the distance between the first rivet and the second rivet can be made relatively large, so
The rivet and hence the vent score can be provided near the center of the lid.

When the picking portion 12 is continuously pulled up, the head end portion 16
Presses the panel portion 2, and the head end portion 16 serves as a fulcrum.
Pushes up the rivet 6 of the
The score part 8 is broken. That is, the vent hole 23 is formed at the position where degassing is performed. As described above, the vent score part can be provided near the center of the lid, so when used as a lid for a can of canned beverage filled with positive pressure, the content of the beverage can be even when the can is relatively inclined at the time of opening. Is hard to spout.

The initial opening 4a of the main score portion 4 in the shape of a horseshoe or a horseshoe that defines the opening 3 that serves as a drinking mouth or the like.
Since the portion opposed to is the missing portion 5, the tearing piece 28 is joined to the panel portion 2 by the missing portion 5 even after the complete opening (FIG. 10). Therefore, even after the opening, there is no fear that the tab 9 and the tear piece 28 will come off from the lid 1.

[0010]

1 and 2, 1 is a metal thin plate, for example, a lid made of an aluminum alloy thin plate for a can, which is easily opened.
Is a panel portion of the lid body. The panel portion 2 is formed with a main score portion 4 that defines an opening portion 3 (see FIG. 10) that serves as a drinking mouth or the like when used, such that its center line extends in the diameter direction. The main score portion 4 includes a circular arc-shaped portion 4b on the peripheral side of the panel portion 2, a wedge-shaped portion 4c with a gradually narrowing distance toward the center side, and a small outwardly curved end 4c 'of the wedge-shaped portion with the narrowest width. It is composed of the arc-shaped portion 4d and has a rough shape (may be a horseshoe shape) as a whole. The portion between the ends 4 of the small arc-shaped portion 4d facing the initial opening 4a, which is the portion closest to the peripheral edge of the panel portion 2, is a missing portion 5.

A first tab for fixing a tab 9 made of, for example, an aluminum alloy thin plate for a can to the panel portion 2 is provided.
The rivet 6 and the second rivet 7 are formed on the radial center side and the peripheral side passing through the initial opening 4a, respectively. A circular Vent score portion 8 is formed in the vicinity of the base portion of the first rivet 6.

The knob tab 9 is composed of an outer tab 10 and a inner tab 11 inside the outer tab 10 which are connected to each other by sharing a narrow straight line-shaped (or arcuate) knob portion 12.
The outer tab 10 has an arc shape on the short side close to the peripheral edge of the panel portion 2 (may be a straight shape having curved portions at both ends).
In addition, the panel portion 2 has a hollow trapezoidal shape in which both corners of the long side which is the grip portion 12 toward the center are curved portions, and the center of the end portion of the arc-shaped portion 10a is the nose portion 13. . The outer tab 10 is fixed to the second rivet 7 by a flexible tongue portion 14 integrally formed inside the arcuate portion 10a. Lance cut portions 14b are formed on both sides of the tongue portion 14, and the outer tab 10 as a whole includes an annular portion 10a and a tongue portion 14. The outer tab 10 is shown in FIGS.
As shown in FIG. 6 and FIG. 6, the tongue portion 14 formed of a single flat plate, and the twistable portions 15 and 15 (FIG. 5) at positions slightly separated from both ends of the knob portion 12 Reinforcing ribs having a C-shaped or circular cross-section are formed by rounding and bending along the line, and the reinforcing ribs are strengthened to the extent that they do not bend when pulled up due to the opening.

The inner tab 11 is formed with a knob hole 17 into which a finger is inserted at the time of opening so that a part of the knob hole 17 extends along the knob portion 12. The inner tab 11 has a first holding piece 18 integrally formed between the pick hole 17 and the head end portion 16.
Is fixed to the rivet 6. A small hole 19 is formed above the holding piece 18. A lance hole 20 extending slightly deeper than the flexible portion 15 is provided between the outer tab 10 and the inner tab 11.
Are formed. As shown in FIGS. 3, 4 and 6, the inner tab 11 also has a holding piece 1 made of a flat plate.
8 and the twistable portions 27, 27 (FIG. 5) slightly apart from both ends of the knob portion 12, reinforcing ribs formed by rounding and bending along the edges are formed for opening. It is strengthened so that it will not bend when pulled up. Two
Reference numeral 1 denotes a recessed portion for facilitating insertion of the fingertip below the knob 12 when pulling up the knob tab 9.

A can body 24 filled with a beverage 22 leaving a head space 23 and a can 2 formed by double-tightening a lid 1.
The opening 5 (FIG. 7) is made as follows. When the knob 12 of the knob tab 9 is pulled up by a finger, the twistable portions 15, 15 and 27, 27 are twisted, and the outer tab 1
0 and the inner tab 11 are out of the same plane, and the inner tab 11 is below the outer tab 10 (FIG. 7).
8a is bent, and the head end portion 16 of the inner tab 11 presses the panel portion 2. At the same time, in the outer tab 10, the base portion 17a of the tongue portion 17 is bent and easily tilted so that the nose portion 13 approaches and contacts the portion 2a of the panel portion radially outside the initial opening portion 4a of the main score portion 4 ( (Fig. 7). Further picking section 1
When 2 is pulled up, the first rivet 6 is pushed up by the lever action with the head end portion 16 as a fulcrum, and the first rivet 6
The vent-score part 8 surrounding the part is broken, and the vent hole 26 is generated to perform degassing, and the first rivet 6 is separated from the panel part 2 together with the holding piece 18 (FIG. 8). The angle α formed by the inner tab 11 and the panel portion 2 is determined by the outer tab 10.
Since it is larger than the angle β formed by the panel portion 2 and the panel portion 2, the initial opening portion 4a does not break at this point.

When the knob 12 is further pulled up, the portion 2a
By the lever action with the nose portion 13 that presses as a fulcrum, the initial opening 4a is pushed up and fractured together with the second rivet 7, and the initial opening of the main score portion 4 is performed (FIG. 9).
Next, pulling back the tab 9 while pulling it back toward the central part of the lid 1 and tearing the main score portion 4 to advance the opening, and finally until the tab 9 becomes nearly parallel to the panel portion 2 ( Figure 10) Pulling, the main score part 4 is missing part 5
The entire surface is smoothly opened by tearing to both sides. In FIG. 10, 3 is an opening and 28 is a tearing piece.

The present invention is not limited to the above embodiment, and for example, only the portions 15 and 15 or only the portions 27 and 27 may be twistable portions. Further, for example, like the lid 31 shown in FIG.
May be located between the first rivet 6 and the knob 12. Alternatively, the knob 12 may be bendable in the width direction, that is, the lateral direction in FIG.

[0017]

INDUSTRIAL APPLICABILITY When the lid of the present invention which is easy to open is used as a lid for a can of food filled with a positive pressure beverage, when the lid is opened,
Even if the can tilts relatively large, there is no risk that the content beverage will spout, and there is no risk that the tab or the tearing piece will separate from the lid body.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view taken along the line II-II in FIG.

3 is an enlarged plan view of the tab of FIG. 1. FIG.

4 is a vertical cross-sectional view taken along the line IV-IV in FIG.

5 is a vertical cross-sectional view taken along the line VV in FIG.

6 is a vertical cross-sectional view taken along the line VI-VI in FIG.

7 is a longitudinal cross-sectional view of essential parts showing a state immediately after the knob of the lid of FIG. 1 that has become a canned lid is pulled up.

8 is a longitudinal sectional view of an essential part showing a state immediately after the knob part of FIG. 7 is further pulled up and the vent score part is broken.

9 is a longitudinal cross-sectional view of relevant parts showing a state where the knob of FIG. 7 is further pulled up to start initial opening.

FIG. 10: until the knob tab of FIG. 7 is nearly parallel to the lid,
It is a principal part longitudinal cross-sectional view which shows the state which bent the tearing piece.

FIG. 11 is a plan view of a lid with an easy opening according to another embodiment of the present invention.

FIG. 12 is a plan view of a lid which is a comparative example.

13 is an enlarged vertical sectional view of the lid of FIG. 12 taken along line XIII-XIII.

[Explanation of symbols]

 1 Easy-to-Open Lid 2 Panel Part 3 Opening Part 4 Main Score Part 4a Initial Opening Part 5 Missing Part 6 First Rivets 7 Second Rivets 8 Vent Score Parts 9 Grip Tabs 10 Outer Tabs 10a Annular Parts 11 Inner Tabs 12 Picking part 13 Nose part 14 Tongue part 15 Twistable part 16 Head end part 18 Holding piece 27 Twistable part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Shimizu 1-69-2 Futamatagawa, Asahi-ku, Yokohama, Kanagawa Prefecture

Claims (1)

[Claims] 1. A lid body having a knob tab fixed to a panel portion of a lid body and having an easy opening, wherein the panel portion defines an opening portion such as a drinking mouth in which a portion facing the initial opening portion is a missing portion. Lucky or horseshoe-shaped main score part, the first rivet surrounded by the Vent score part on the central side on the radial direction passing through the initial opening, and on the peripheral side close to the inside of the initial opening. Two rivets are formed, and the tab has an outer tab sharing the tab and an inner tab located inside the tab, and the outer tab has an annular portion including the tab and a second rivet. The nose portion is located outside the initial opening, and the inner tab is fixed by the flexible holding piece located on the knob side with respect to the head end. Fixed to the rivet No. 1 and A twistable portion or a bendable portion is formed on the tab side with respect to the first rivet of the tab and / or the inner tab, and when pulling up the tab for opening, the inner tab is below the outer tab. A lid with an easy opening that is characterized by that.