JPH031391Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a simple opening container sealed with a lid made of a composite sheet containing metal foil such as aluminum foil or a single layer sheet. The present invention relates to a simple opening container that can be opened easily without making scores or cuts in the lid or without using an opening tool.

[Conventional technology] Currently, the lids of cans of powdered milk, etc. contain 0.2 to 0.35
0.11~0.18mm for aluminum material with a thickness of about mm
A method in which a score having a certain depth is provided, a hollow rivet is formed in a part of the lid, a tab for opening the can is caulked to this rivet, and the score line is broken and removed by the lever action of this tab. are used.

Another type of lid is one made of metal foil, a synthetic resin sheet, or a composite sheet of these, which is formed to fit over the mouth of the container, and then wrapped or welded with a metal or plastic ring. There is something.

Furthermore, there is a simple opening container as shown in FIG. 1, which was proposed by the present applicant in Utility Application No. 56-63779.

This was developed to solve the problems of aluminum powder contamination, safety, impact resistance, and economic efficiency of the first score type lid, and the complicated opening operation of the second type lid. It is something that

[Problems to be solved by the invention] However, the simple opening container proposed in Utility Model Application No. 56-63779 has the following drawbacks. That is, if explained using FIG. 1 and the reference numerals in the figure, the opening tension piece 7
If the pulling direction of the grip part 1 provided at the starting end of the opening of In this case, since the lid 2 does not have enough bending, the stress of tearing along the opening edge 5 is dispersed, and the opening edge 5 and the opening tension piece are 7, the tear is made, and the lid 2 is attached to the opening edge 5 at about 180° from the initial opening, as shown by the imaginary line.
There were cases where uncut parts were left behind.

[Means for Solving the Problems] The structure of the present invention which solves the problems of the prior art is to combine a lid made of a composite sheet containing metal foil or a single layer sheet of metal foil with a ring made of metal or plastic. A container that is wrapped or fused to the mouth edge of the can body, and an opening tension piece with a grip at one end is fused or bonded to the top surface of the lid with a strength stronger than the tear strength of the lid. In the simple opening container in which the lid is opened by using the inner edge of the ring as an opening edge by pulling up the opening tension piece, the opening tension piece is formed into a spiral band-like piece along the entire circumference of the opening edge of the ring. The opening tension piece is constructed in such a manner that the inner and outer spiral strips are connected by a connecting piece that is easy to cut, and the gripping portion is provided at the inner starting end of the strip. The outer peripheral edge and the opening edge of the ring are spaced approximately at equal intervals.

[Function] The present invention employs such a configuration, so that when the opening tension piece is pulled up and the tearing of the lid progresses and reaches the opening edge of the lid, sufficient deflection is generated, so that all the stress is transferred to this opening. Since the tearing is concentrated on the edges, a complete opening with no uncut areas can be obtained.

[Example] To explain the details of the example with reference to FIG. 2, 1
Reference numeral 1 denotes a lid that is integrally wound around the upper opening of a can body (not shown) with a metal ring 13 having an opening edge 12. The present invention relates to an improvement of this lid 11.

This lid 11 is formed of a composite sheet in which a thermoplastic synthetic resin layer is laminated on the upper surface of aluminum foil. The opening tension piece 14 is a spiral strip connected by a plurality of connection pieces that are easy to cut.
and the opening edge 12 of the ring 13 at approximately equal intervals, and are fused or bonded to the upper surface of the lid 11 with a stronger tear strength than the lid 11. Note that the opening tension piece 14 does not need to be made of the same type of composite sheet as the lid 11, and may be made of any material that has strength slightly higher than the tear strength or tensile strength of the lid. Further, although the lid is made of a composite sheet, it may be made of a single layer or multiple layers as required.

Furthermore, if the length of the opening tension piece 14 is slightly longer than one circumference, it will be effective in removing uncut parts, but by making it preferably longer than one and a half circumferences, the uncut parts, especially around 180° from the opening start end, can be completely removed. It will be resolved in

In this embodiment, the open tension piece 14 having a spiral structure is
As shown in the figure, since it is configured in a spiral shape with approximately one circumference and three-fourth circumference, the band-shaped piece on the opposite side of the starting end 14b, that is, around 180 degrees, has double inner and outer sides. Further, a lid 11 is provided at the inner starting end portion 14b.
A grip portion 15 that is weakly adhered or not adhered to the upper surface is continuously provided, and the spiral end portion 14c has an outer edge of the inner opening tension piece 14d adjacent to the end portion 14c. A protrusion 16 facing toward the opening edge 12 of the ring 13 is formed on the ring 13 . However, it is not necessary to provide the protrusion 16. (The effect will be explained later.)
In the figure, 17 is an inner guide line of the inner opening tension piece 14d, and 18 is an inner guide line of the outer opening tension piece 14e.

19 is a connecting piece that connects the inner and outer opening tension pieces 14d and 14e and is easily cut;
As a result, even if the opening tension piece of the present invention is manufactured in the form of a band, the resin flows well and is easy to mold.
When adhering, even if the rigidity of the opening tension piece is insufficient, stacking, separation, and transportation are facilitated, mechanical suitability is improved, and production efficiency is improved. In addition, inner and outer opening tension pieces 14d,
14e can be maintained appropriately. The number of turns of the opening tension piece 14 may be multiple turns such as double or triple. In the figure, 20 is the boundary line between the grip portion 15 and the opening tension piece starting end portion 14b.

[Description of Action] Next, the opening process will be explained. When the grip part 15 is pulled up by the usual method, the inner opening tension piece 14d is torn along the inner guide line 17, and the outer opening tension piece 14e is torn along the inner guide line 17. The tearing along 18 proceeds simultaneously with the cutting of the connecting piece 19. If the grip is still pulled up, the tearing along the inner guide line 17 of the inner opening tension piece 14d will be interrupted as the lid 11 will bend when the tearing progresses to approximately half the circumference. Therefore,
Only the tearing along the inner guide line 18 of the outer opening tension piece 14e is sustained, and in most cases, since the pulling direction is outward, this tearing is caused by the tearing along the outer end portion 14.
ring 13 in the direction illustrated by phantom lines from c.
The opening edge 12 is reached. Incidentally, in rare cases, there is tearing shown by the broken line, but when the protruding part 16 is provided, the tearing from the outer end part 14c is carried over by the protruding part 16 and reaches the opening edge 12 in the shortest distance.

Further, this tearing progresses along the opening edge 12, but at this point, there is no tearing along the inner guide edge 17 that is simultaneously progressing, so all the stress is concentrated on this opening edge 12. Opening edge 1
2, the tearing continues smoothly to the end, and the lid 11 can be completely opened.

In addition, during the above opening process, if the pulling direction of the grip part 15 provided on the opening tension piece 14 is inappropriate, or if there is a defect in adhesion on the inner guide edge 17, the outer opening tension piece 14e inner guide line 18
In many cases, uncut parts of the lid 11 are left behind, but 2
In the second tearing, the ring 13 is completely removed together with the outer opening tension piece 14e.
A complete opening with no uncut edges can be obtained.

[Effects of the invention] According to the configuration of the invention as described above, the following effects can be obtained.

(a) When manufacturing an opening tension piece, the presence of multiple connecting pieces allows the resin to flow easily even if it is in the form of a band, making it easy to form. In this case, even if the rigidity of the opening tension piece is insufficient, stacking, separation, and transportation are easy, improving mechanical suitability and improving production efficiency. can be kept.

(b) Since the tear guiding the inner guide line 17 of the inner opening tension piece configured in a spiral shape is interrupted, the stress is concentrated on the inner guide line 18 of the outer opening tension piece, and the stress is applied along this inner guide line 18. The lid is sufficiently bent due to the tearing, and the tearing of the inner guide wire 18 continues to the opening edge 12 of the ring, and all the stress is concentrated on this opening edge 12. An opening can be made.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a prior example, and FIG. 2 is a plan view of the present invention. DESCRIPTION OF SYMBOLS 11... Lid, 12... Opening edge, 13... Ring, 14... Opening tension piece, 14a... Outer peripheral edge, 1
4b...Inner starting end, 14c...Outer ending end, 1
4d...Inner opening tension piece, 14e...Outer opening tension piece, 15...Gripping portion, 17, 18...Inner guide wire, 19...Connecting piece.

Claims (1)

[Claims for Utility Model Registration] (1) A lid made of a composite sheet containing metal foil or a single layer sheet of metal foil is wrapped around the mouth edge of a can body together with a ring made of metal or plastic, or , a fused container, in which an opening tension piece having a grip at one end is fused or adhered to the upper surface of the lid more strongly than the tear strength of the lid, and by pulling up the opening tension piece, the ring In the simple opening container in which the lid is opened with the inner edge of the ring as the opening edge, the opening tension piece is constituted by a spiral strip along the entire circumference of the opening edge of the ring, and the inner and outer strips of the spiral An open tension piece in which the strips are connected by a connecting piece that is easy to cut, and the holding portion is provided at the inner starting end of the strip, the opening being between the outer peripheral edge of the open tension piece and the opening edge of the ring. A simple opening container characterized in that the containers are spaced at approximately equal intervals. (2) The easy-to-open container according to claim 1, wherein the gripping portion is temporarily fixed to the lid so that it can be easily peeled off.