JPH02205551A - Lid body of can-like container - Google Patents

Abstract

PURPOSE:To improve easy-to-open ability of a can, simplify resealing after opening and improve can strength at the time of falling by a method wherein an inner peripheral part and an outer peripheral part are not heat-jointed but a hook of the inner peripheral part is engaged with a protrusion of the outer peripheral part. CONSTITUTION:On a peripheral part of an inner peripheral part 6 except a sticking tip 8 of a main body 7, a hook 9 is formed. An outer peripheral part 10 has a flange 11, a descending wall 12, a bottom 13 and a protrusion 14. A tip 90 of the hook 9 of the inner peripheral part 6 is fitted into a groove partitioned and formed by the protrusion 14, the upper face of the bottom 13 and the inner face of the descending wall 12 of the outer peripheral part 10. By lifting a tab 5, since the sticking tip 8 is in contact only with the protrusion 14, it simplifies pushing and breaking of a gas barrier type multilayer base material 1, and by pulling the tab 5, the hook and a lid can be easily opened. The inner peripheral part 6 can be re-sealed by fitting the hook 9 into the groove of the outer peripheral part 10. Since the hook 9 of the inner peripheral part 6 is fitted into the groove of the outer peripheral part 10 and not moved, strength of the can when falling down in a lateral direction fall or a slanted direction fall can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a can-like container body, and more particularly, to a lid body attached to the body of a can-like container for storing foodstuffs, etc., and which can be used as an auxiliary tool such as a can opener. The present invention relates to a plastic can-like container lid that can be easily opened without using a container.

[Prior Art] The lid of a can-like container is required to be easy to open in order to open the lid and take out the contents inside the container. Conventionally, it has been done to open the package using an auxiliary tool such as a can opener, but this is cumbersome, and most people now open the package without using the auxiliary tool such as a can opener. The use of plastic lids for can-like containers is also being promoted, but unlike metal cans, there are various difficulties in realizing this.

The easy-to-open property also includes a so-called pull property that allows the opening to be torn off to the end when opening the lid.

On the other hand, the lid must not be one that will easily break when the can is dropped after filling with contents, and must also have high can-drop strength. .

Furthermore, from a food hygiene perspective, the lid body is subject to so-called tamper resistance (T a + 5 perresis- tion, for example, when a dI substance is mixed into the can with a syringe needle).
tance) (tamper prevention) functions are also required.

Conventionally, in order to open the lid, as shown in Fig. 7, a score was created by notching (cutting 1) the plastic layer 2 of the resin base material 2 which had gas barrier properties including 80m. 3, or as shown in FIG. 8, the surface of the base material 1 is exposed to the outside in the score 3 formed on the plastic layer 2, and as shown in FIG. It is attached to the body 4 of a similar container by thermal bonding, the tab portion 5 on the plastic layer 2 is lifted, and the opening is opened along the score 3.

Examples of patents describing plastic can-like container lids include JP-A-52-39489 and JP-A-58.
Publication No.-125448 and Publication No. 60-23154 are mentioned.

[Problems to be Solved by the Invention] However, with such a lid, there are some drawbacks in that the easy opening property, especially the ease of tearing to the end, that is, the pulling property is insufficient, and the score is easily damaged during the distribution process. Furthermore, since the 5-note score is exposed, there is also a problem with the tamper resistance function.

In addition, the lid body can be used in a full oven (fully open) or in a partial oven (according to the score).
After opening at part [jl), the opening inside the score is removed and if the contents of the can remain inside the can, the storage method is to attach a separate cap for it or to use a film. It is necessary to store the product by wrapping it in a plastic wrap such as a plastic wrapper, etc., and it requires a troublesome operation when resealing the product after it has been opened.

Further, the conventional lid as described above may be weak in strength when the can is dropped laterally or diagonally.

The present invention eliminates the drawbacks of such conventional examples.

It improves easy openability (including pullability), is less likely to be damaged during the logistics process, improves tamper resistance, and can be easily resealed even after it has been opened. The object of the present invention is to provide a technique that can improve the strength of cans falling when dropped or diagonally dropped.

The above and other objects and novel features of the present invention are as follows:
It will become clear from the description in this specification and the accompanying drawings.

[Means for Solving the Problems] The present invention provides a lid that is attached to the body of a can-like container, and the lid has a gas barrier layer as an inner layer and a synthetic resin layer that can be thermally bonded as both outer layers. Gas barrier property, consisting of a three-layer structure, having a bottom part, a rising part connected to the entire circumference of the upper surface of the bottom part, and a flange part connected to the entire edge of the face-F part and protruding outward. With multilayer base material.

A flange portion, a descending wall portion continuous to the entire inner periphery of the flange portion, a bottom portion connected to the lower peripheral edge of the descending wall portion and protruding inward to an appropriate width, and the entire peripheral edge of the bottom portion. Excluding the outer periphery made of synthetic resin and having a protrusion partially or partially protruding upward, the main body located within the outer periphery, and the protruding tip of the main body (over the entire circumferential end) Alternatively, the inner circumferential portion is made of synthetic resin and has a hook portion configured by being divided.

a tab portion attached to the upper surface of the main body of the inner peripheral portion, which allows the thrusting tip to open the lid when the lid is opened, and a lower surface of the projection of the outer peripheral portion; The lower surface of the bottom, the outer surface of the descending wall, and the outer surface of the flange are thermally bonded to the inner surfaces of the bottom, rising portion, and flange of the gas barrier multilayer base material, and the lower surface of the main body of the inner peripheral portion and the gas barrier are bonded to each other. The top surface of the bottom of the multilayer base material is thermally bonded at least at the outer peripheral edge of the inner peripheral part.

There are 61 can-like bodies characterized in that the inner peripheral part and the outer peripheral part are not thermally bonded, and the hook part of the inner peripheral part is engaged with the protrusion part of the outer peripheral part.

[Operation] The operation of the main configurations (means) that characterize the present invention will be outlined below.

In the present invention, a bottom portion is provided to protrude into the lid body by an appropriate width and is connected to the lower peripheral edge of the descending wall portion of the outer peripheral portion made of synthetic resin. This width is made small so that the main body of the inner peripheral part made of synthetic resin, which will be described later, can be placed inside the projection of the outer peripheral part, which will be described below. In addition, as will be described later, the width is such that the hook portion of the inner circumferential portion can fit therein.

Protrudes upward (erect) on the peripheral edge of the bottom of the outer periphery.
Provide a raised protrusion.

Therefore, a groove defined by the protrusion on the outer periphery, the upper surface of the pentacle bottom, and the inner surface of the descending wall is formed on the outer periphery.

Note that a flange portion is provided at the upper portion of the descending wall portion of the outer peripheral portion.

The present invention provides a flange portion, a descending wall portion continuous to the entire inner periphery of the flange portion, a bottom portion connected to the lower peripheral edge of the descending wall portion and protruding inward to an appropriate width, and a periphery of the bottom portion. 1. Insert the tip of the hook part of the synthetic resin inner periphery into the above-mentioned groove of the synthetic resin outer periphery, which has a protrusion that protrudes (erects) upward on the whole or partially of the edge. Make it fit.

That is, the 5-piece inner peripheral portion includes a main body having a size that fills the entire inside of the protrusion of the outer peripheral portion, and a hook portion formed at the peripheral end of the main body.

This hook portion has a tip that can fit into the groove.

This hook portion is configured except for the protruding tip portion of the peripheral end portion of the main body.

When constructing the lid, the peripheral edge of the main body of the inner peripheral portion is positioned inside the protrusion of the outer peripheral portion.

Then, as described above, the tip of the hook portion on the inner circumferential portion is fitted into the groove defined by the protrusion on the outer circumferential portion, the upper surface of the bottom protruding narrowly, and the inner surface of the descending wall portion.

The lower surface of the protrusion on the outer periphery, the lower surface of the bottom, the outer surface of the descending wall, the outer surface of the flange, and the lower surface of the main body on the inner periphery are covered with at least three layers having a gas barrier layer as an inner layer and a synthetic resin layer that can be thermally bonded to both outer layers. The material is thermally bonded to a gas barrier multilayer base material having a layered structure and having a bottom portion, a rising portion continuous to the entire circumference of the upper surface side of the bottom portion, and a flange portion connected to all edges of the rising portion and protruding outward. .

Specifically, the lower surface of the projection on the outer periphery, the lower surface of the bottom, and the main body surface of the inner periphery are on the top surface of the bottom of the base material, and the outer surface of the descending wall on the outer periphery is on the inner surface of the rising part of the base material. Further, the outer surface of the flange portion of the outer peripheral portion is thermally bonded to the inner surface of the flange portion of the base material.

However, in the present invention, the hook portion is only fitted into the groove, and the protruding tip portion of the inner circumferential portion is only in contact with the protrusion portion of the outer circumferential portion.

Lift up the tab attached to the top of the main body on the inner periphery.
As mentioned above, the protruding tip of the inner circumferential part is only in contact with the protrusion of the outer circumferential part and is not 1lff (fixed) due to heat, so the tip of the protruding tip is
The gas barrier multilayer base material at the bottom is easily pressed and torn, and after the pressing, when the tab section is pulled toward the user's hand, the hook section is fitted into the groove as described above. Similarly, since the lid is not fixed by heat, the lid can be opened easily and has good pullability, resulting in extremely good final easy-opening performance.

The hook part on the inner periphery is fully fitted on the outer periphery, and these boundaries are covered by the hook part, and the thrusting tip of the inner periphery has a gap corresponding to the conventional score with the protrusion on the outer periphery. Since it is in contact with the lid without providing a score, it prevents the score from being damaged or tampered with, which is advantageous in the logistics process. , the tamper resistance function can also be improved.

In addition, the separated inner peripheral part (including the gas barrier multilayer base material thermally bonded to the bottom surface of the main body) can be re-tubed once opened by fitting the hook part into the groove of the outer peripheral part again. The present invention eliminates the need for a separate overcap as in the past, or for storing stones in plastic wrap or the like in order to place stones in open openings that cannot be closed again. As mentioned above, all you have to do is put the lid back on at the inner periphery and store it in a refrigerator or the like.

Further, since the hook portion on the inner peripheral portion is fitted into the groove on the outer peripheral portion and is not moved, it is possible to improve the strength of the can falling in a horizontal direction or a diagonal direction. As in the past, when an object is provided with a score, when the contents are filled in m and the object is dropped, stress is concentrated on the score (causing breakage of the can). Not providing something equivalent to a score also improves R8 can strength.
It is also a cause of

[Example] Next, an embodiment of the present invention will be described based on the drawings.

FIG. 3(A) shows a plan view of the inner peripheral part, and FIG.
) shows a plan view of the outer periphery.

A hook PIS 9 is formed at the peripheral end portion of the inner peripheral portion 6 excluding the thrusting tip portion 8 of the main body 7 .

The outer peripheral portion 10 includes a bottom portion that protrudes slightly inward and is connected to the lower peripheral edge of the flange portion 11, the descending wall portion 12 that is continuous to the entire inner peripheral portion of the flange portion 11, and the false descending wall portion 12. 13 and a protrusion 14 erected upward on the entire circumferential edge of the bottom portion 13.

In FIG. 3(A), the tab portion is omitted from the upper surface of the main body 7 of the inner peripheral portion 6.

The upper part of FIG. 2 shows a perspective view cut along the line 1-1 in FIG. 3 in which the tab portion 5 is attached to the upper surface of the main body 7 of the inner peripheral portion 6.

The lower part of FIG. 2 shows a perspective view taken along line I+-11 in FIG. 3(B) of the outer peripheral portion 10 fixed on the gas barrier multilayer base material l.

As shown in FIG. 1 and FIG.
It fits into a groove defined by the upper surface of the lower wall portion 12 and the inner surface of the descending wall portion 12.

The side surface of the protruding tip 8 of the inner circumference 6 abuts against the protrusion 14 of the outer circumference 10 .

The lid body is formed by adhering (fixing) the entire lower surface of the main body 7 of the inner peripheral part 6, the do surface of the protrusion 14 of the outer peripheral part 1o, and the lower surface of the bottom part 13 to the upper surface of the bottom part IA of the gas barrier base material l. −
The outer surface of the descending wall part 12 of the outer peripheral part 10 is fixed to the inner surface of the rising part IB of the multilayer base material 1, and the inner surface of the collar NIC of the multilayer base material 1 and the flange part +1 of the outer peripheral part 10 are fixed. The outer surface of the This embodiment shows an example in which the entire inner surface of the flange portion 1c of the base ↑A 1 and the entire outer surface of the flange portion 11 of the outer peripheral portion IO are fixed, but the end of the flange portion 11 of the outer peripheral portion 10 is shown. A portion extending in the direction of the descending wall portion 12 of the outer circumferential portion 11 is provided to partially connect the outer surface of the flange portion l of the outer circumferential portion 10 and the flange IC of the gas barrier multilayer base material 1. It may be fixed.

In the lid body of the present invention, the thrusting tip portion 8 of the inner peripheral portion 6
The side surface of the outer periphery 1 is simply brought into contact with the protrusion 14 of the outer periphery 1 and 10, and is not fixed as described above.

FIG. 4 shows an enlarged cross section of the main part.

Inner circumference ff1S 6 side surface of thrusting tip 8 and outer circumference 1
The contact portion 15 with the side surface (outer surface) of the protrusion 14 of 0 is in contact with the side surface (outer surface) of the protrusion 14.

FIG. 5 shows another embodiment of the present invention, and in the embodiment shown in FIG. , an example has been shown in which fA16 of the portion of the inner circumferential portion 6 that the thrusting tip 8 abuts is exposed to the outside, but in the embodiment shown in FIG. A fully covered part 80 is provided to protrude parallel to the upper surface of the tab part 5 to cover the groove 16 and prevent it from being exposed to the outside. Thereby, the tamper resistance function can be further improved. In such a case, since the bottom portion 13 of the outer peripheral portion 10 is configured to have a small width, the easy opening property is not hindered much.

FIG. 6 also shows another embodiment of the present invention, and in the embodiment shown in FIG. Although an example has been shown, as shown in the plan view of the inner peripheral part in FIG.
It is also possible to partially configure the peripheral end portion by dividing it into three locations, for example.

The gas barrier multilayer base material 1 used in the present invention has at least a three-layer structure having a gas barrier layer as an inner layer and heat-bondable synthetic resin layers as both outer layers. A specific example is a three-layer structure having a gas barrier layer as an intermediate layer and heat-bondable synthetic resin layers on both surface layers.

The gas barrier layer must be impermeable to oxygen, water, and other substances that would spoil the contents of the can.

Examples of materials constituting the gas barrier layer include metal foil, plastic film, and plastic sheet. An example of metal foil is AQ foil.

Examples of the above-mentioned films and sheets include films and sheets made of saponified ethylene-vinyl acetate copolymers, polychloride, nylidene, polyamide, polyacrylonitrile, and the like.

As the material constituting the gas barrier layer used in the present invention, metal foil, particularly aluminum foil, can be used.
Among the resin layers constituting the gas barrier multilayer base material l, which is preferable from the viewpoint of the desired purpose of the present invention and economical efficiency, one resin layer is fixed to the inner peripheral part 6 and the outer peripheral part 10, and the other resin layer is fixed to the inner peripheral part 6 and the outer peripheral part 10. The layer is fixed to the body 4 (FIG. 9) of the can-like container.

The resin used in the synthetic resin layer is one that can be heat-sealed for purposes 1 and 2. For example, a thermoplastic synthetic resin that melts when heated is conveniently used.

In particular, it is better to use polypropylene resin (PP).
It is preferable to use block l) P, although it may be of the homo- or copolymer type.

In the present invention, the thickness of the synthetic resin layer constituting the gas barrier multilayer base material must be 100 μm or less on one side in relation to ease of opening and strength against dropping cans when used as a product. Layer thickness is 50μ or less, preferably 9~
It is desirable that the thickness be 30μ.

In the lid body of the present invention, for example, a gas barrier multilayer base material 1 is installed in a mold of an injection molding apparatus, and a synthetic resin is injected into the base material 1 to form an outer peripheral portion of the base material 1. 10 is laminated in advance as shown in the lower part of FIG. It can be obtained by attaching it to a material by high-frequency fusing, but it can also be obtained by various other manufacturing methods.

As the synthetic resin constituting the outer circumferential portion 10 and the inner circumferential portion 6, the same synthetic resin as the synthetic resin constituting the gas barrier multilayer base material 1 can be used.

These synthetic resins contain pigments, inorganic fillers, and lubricants.
Divine additives can be added as needed.

According to the present invention, the tab f! attached to the upper surface of the main body 7 of the inner peripheral portion 6! 15, the thrusting tip 8 of the inner circumference 6 is only in contact with the protrusion 14 of the outer circumference 10 and is not fixed, so the thrusting tip 8
To facilitate the pushing and tearing of the gasparian multilayer base material l at the bottom, and after the pushing and pulling, when the tab part 5 is pulled toward the hand side,
Since the hook part 9 is only fully fitted 16 and not fixed in the same way, the lid body can be opened easily, its pullability is good, and the final easy-opening property is extremely good.

Further, according to the present invention, the hook portion 9 of the inner circumferential portion 6 is fitted into the outer circumferential portion 10, and these boundaries are covered with the hook portion 9, and the protruding tip of the inner circumferential portion 6 Since the portion 8 is in contact with the protrusion 14 of the outer circumferential portion 10 without providing a gap corresponding to a conventional score, there is no possibility that the score may be damaged or the score may be tampered with, unlike a lid body provided with a conventional score. This is advantageous in the logistics process, and the tamper resistance function can also be improved. As shown in FIG. 5, the tambour resistance function can be further improved by providing a full covering part 80 to cover the full 16 parts.

Further, according to the present invention, the opening allows the removed inner peripheral part 6 (including the gas barrier multilayer base 1 thermally bonded to the lower surface of the main body) to connect both the hook parts 9 and the outer peripheral part 10. 16, it is possible to store the product at a density of Ifj after the frontage of -tq, and there is no need for the storage method of attaching a separately manufactured overcap or wrapping it with a plastic wrap, etc., as in the past. All you have to do is cover the inner periphery 6 again and store it in a refrigerator or the like.

Furthermore, according to the present invention, the hook portion 9 of the inner circumferential portion 6 is fitted into the outer circumferential portion 10 so that it does not move. can be done. Furthermore, as in the past, when the can was filled with contents and dropped, stress was concentrated on the score (which caused the can to break), but in the present invention Not providing anything equivalent to the conventional score is also a factor in improving lightning strike strength.

1 - The invention made by the present inventor has been specifically explained based on examples, but the present invention is not limited to the above examples, and it is understood that various changes can be made without departing from the gist of the invention. Needless to say.

For example, the protrusions on the outer periphery may not be provided on the entire periphery, but only on the portions corresponding to the hook portions on the inner periphery.

Further, the lower surface of the main body at the inner peripheral portion and the upper surface of the bottom of the gas barrier multilayer base material may not be thermally bonded to the entirety, but only at least the outer peripheral edge of the inner peripheral portion may be thermally bonded.

The present invention can be applied to can-like containers of various shapes, such as round cans, horns, and oval cans.

[Effects of the Invention] A brief explanation of the effects obtained by typical inventions disclosed in this application is as follows.

According to the present invention, it is easy to open, is less likely to be damaged during the logistics process, has improved tamper resistance, and can be easily resealed after opening.
Furthermore, we were able to provide a technique that can improve the strength of dropped cans.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional perspective view showing an actual example of the present invention, Fig. 2 is an assembled configuration diagram showing an embodiment of the present invention, and Fig. 3 (Δ) is an inner peripheral part showing an embodiment of the present invention. FIG. 3(B) is a plan view of the outer peripheral part showing an embodiment of the present invention, FIG. 4 and FIG.
The figures are sectional views showing other embodiments of the present invention, FIG. 6 is a plan view of the inner circumference showing other embodiments of the present invention, and FIGS. 7 to 9
Each figure is a sectional view of a conventional example. - Gas barrier multilayer base material 4...Can-like container body 5...Tab portion 6...Inner peripheral portion 7...Main body 8...Pushing tip portion 9...Hook portion 10...・Outer circumferential portion・Flange portion 12...Descent wall portion 13...Bottom portion/Protrusion groove Patent applicant Showa Denko K.K.

Claims (1)

[Claims] In a lid attached to the body of a can-like container, the lid includes:
It has at least a three-layer structure with a gas barrier layer as an inner layer and a heat-bondable synthetic resin layer as both outer layers, and includes a bottom portion, a rising portion continuous to the entire circumference of the upper surface of the bottom portion, and all ends of the rising portion. a gas barrier multilayer base material having a flange portion connected to the edge and protruding outward; a flange portion; a descending wall portion continuous to the entire inner periphery of the flange portion; and a descending wall portion connected to the lower peripheral edge of the descending wall portion. an outer periphery made of a synthetic resin, the outer periphery having a bottom projecting inward to an appropriate width and a protrusion projecting upward over the entire or partial peripheral edge of the bottom; an inner periphery made of a synthetic resin having a main body located at the main body and a hook portion formed over the entire circumferential end of the main body except for the protruding tip or divided; and an upper surface of the main body of the inner periphery. a tab portion that is attached to the tab portion that allows the protruding tip portion to open the lid body by lifting it up when opening the lid body; and the outer surface of the flange portion and the inner surfaces of the bottom, rising portion, and flange portion of the gas barrier multilayer base material are thermally bonded, and the lower surface of the main body of the inner peripheral portion and the bottom upper surface of the gas barrier multilayer base material are thermally bonded. are thermally bonded at least at the outer circumferential edge of the inner circumferential portion, but the inner circumferential portion and the outer circumferential portion are not thermally bonded, and the hook portion of the inner circumferential portion is engaged with the projection portion of the outer circumferential portion. A can-like container lid body characterized by: