JPH1081323A - Packaging container material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container material with which housing of contents, closing of a lid, and fixing of the lid and a body can be done quickly and securely by a single operation simpler than in a conventional operation or by similar procedure, and the operation for opening the lid is also very easy, the contents are prevented from being subjected to shock, and which is prevented from being damaged and can be repeatedly used. SOLUTION: In a packaging container material, a body and a lid make a protrusion formed on one peripheral part fitted into a recess formed at other peripheral part and fix them so as to form a lid closing container. A curvature radius (r) at a curved part l at the corner of the protrusion formed on the peripheral part to be an inner side at fitting is set to be smaller than a curvature radius (r') of a curved part 2 at the corner of the recess formed on the peripheral part to be an outer side at fitting, and a center (o) of the curvature radius of the curved part l at the corner of the protrusion is set to be an outer side of a center (o') of the curvature radius of the curved part 2 at the corner of the recess at fitting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple packaging of various lightweight articles such as accessories, stationery, electronic parts, machine parts, tools, etc., which is suitable for packaging foods such as fresh foods and processed foods. More specifically, the present invention relates to a packaging container material having a specific fitting structure and comprising a pair of containers and a lid and having excellent opening and closing operability, particularly to a packaging material for food.

[0002]

[Prior Art] Fresh foods and prepared foods such as fruits, vegetables and marine products,
2. Description of the Related Art As a simple and lightweight packaging material for processed foods such as hamburgers, assorted dishes, and lunch boxes, a packaging container material including a pair of containers and a lid is used. Many of the packaging container materials that have been conventionally used are, as illustrated in FIG. 5A, flanges around the periphery of the container A and the lid B that are integrally formed by sharing the hinge-shaped operation part 3. The flanges 4 and 5 are overlapped with each other and closed.
Has no means of locking. Then, the packaged object (not shown) is put into the container A, and the hinge-shaped operation portion 3
After closing the lid by superposing the flange-shaped portions 4 and 5 on the periphery and closing the lid, holding the state by hand, using a fastener such as an adhesive tape or a stapler or a method of bonding, welding, etc. By fixing one or several portions of the portion, the lid B is fixed to the container A, and the closed lid container C shown in FIG. Alternatively, as shown in FIG. 6A, the container A and the lid B are separately formed,
This is a packaging container material in which the peripheral portions are overlapped, the convex portion is pushed into the concave portion formed in the peripheral portion, fitted and fixed, and the closed container C shown in FIG. 6B is formed.

[0003]

However, as described above, the conventional integrated packaging container material includes the container-side flange-shaped portion 4 and the lid-side flange-shaped portion 5 to be overlapped.
Since no means of securing are taken, tools such as adhesive tapes, staplers, adhesives, and heat-sealing machines are required. The processing is extremely complicated. In addition, when the contents are taken out of the container closed in this way, the container is usually destroyed, and sometimes the contents are scattered by the shock. On the other hand, in the conventional packaging container material fixed by fitting of the concave and convex shape of the peripheral part, there is a work of overlapping the peripheral parts at the time of fitting and pushing it in so as to fit at least several places evenly. Then, it is very complicated. An object of the present invention is to develop a lightweight packaging material that can store contents without requiring any tools and is easy to take out. As a result of various studies, the present inventors have developed a novel fitting part. The present invention has been completed by providing a basic structure, and the present invention has been completed.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a container and a lid are provided by fitting and fixing a convex portion formed on one peripheral portion and a concave portion formed on the other peripheral portion.
In the packaging container material in which the closed container is formed, the curvature radius r of the curved portion at the corner of the convex portion formed in the peripheral portion which is inner when fitting is formed in the peripheral portion which is outer when fitting. The center o of the radius of curvature of the curved portion at the corner of the convex portion is smaller than the center o 'of the radius of curvature of the curved portion at the corner of the concave portion. The present invention provides a packaging container material excellent in opening and closing operability, particularly a food packaging container material, characterized in that it is formed so as to be sometimes outside, and preferably the container and the lid share a hinge-like operation part. The present invention provides a packaging container material formed continuously and integrally.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structural aspect of the packaging container material of the present invention is illustrated in FIGS. FIG. 1A is an enlarged view showing a state in which a curved portion 1 at the corner of the convex portion and a curved portion 2 at the corner of the concave portion before fitting are overlapped, and FIG. It is an enlarged view which shows the state of 2. FIG. 2 is a plan view of a packaging container which is one of the embodiments of the present invention and is formed continuously and integrally by sharing a hinge-like operation part. FIG. 3 is a cross-sectional view of the packaging container of FIG. FIG. 4 is a perspective view of a closed container formed from the packaging container material of FIG. As shown in FIG. 1, the packaging container material of the present invention has
The radius of curvature r of the curved portion 1 at the corner of the convex portion formed in the peripheral portion of the above is determined from the radius of curvature r 'of the curved portion 2 at the corner of the concave portion formed at the peripheral portion of the lid B, which is outside at the time of fitting. And the center o of the radius of curvature of the curved portion at the corner of the convex portion
Are formed to be outside of the center o ′ of the radius of curvature of the curved portion at the corner of the concave portion at the time of fitting.

When forming the closed container C as shown in FIG. 3, since r <r 'and o is outside o' as shown in FIG. The curved portion 1 at the corner of the convex portion formed at the peripheral portion of A overlaps with the curved portion 2 at the corner of the concave portion formed at the peripheral portion of the lid B so as to shift toward the inside of the container. Therefore, a force can be applied by sandwiching the curved portion 2 at the corner of the concave portion and the curved portion 1 at the corner of the convex portion with a finger or the like, and the fitting can be easily performed by utilizing the elastic deformation of the material of the container. Once fitted, since the curved portion 1 at the corner of the convex portion presses the curved portion 2 at the corner of the concave portion from the inside to the outside of the packaging container, it is not easily detached, and is fixed to each other. Compete with each other.

[0007] Therefore, the closing operation is performed as shown in FIGS. 5 and 6.
The procedure can be performed by one-touch or a procedure similar thereto, which is smaller than the conventional integrally-molded closed container and the fitted closed container as shown in FIG. Also, in the case of opening the lid, if one hand grasps and fixes one of the container A or the lid B, and pulls the other lightly in the vertical direction with the other hand, there is no shock to the contents. The lid can be quickly opened without giving or without damaging the container at all, and the container can be used as many times as possible.

In the present invention, the radius of curvature r of the curved portion 1 at the corner of the convex portion formed on the peripheral portion of the container A, which is formed inside when fitted, and the peripheral portion of the lid B, which is formed outside when fitted, is formed. Difference from the radius of curvature r ′ of the curved portion 2 at the corner of the recessed portion,
Alternatively, the center o of the radius of curvature of the curved portion 1 at the corner of the convex portion
And the center o 'of the radius of curvature of the curved portion 2 at the corner of the concave portion are determined by the size, shape, thickness, physical properties, and contents of the packaging container formed by the packaging container material of the present invention. Are set in accordance with the form and the intended use. If this difference is too small with respect to the size of the packaging container, the deviation between the curved portion 1 at the corner of the convex portion and the curved portion 2 at the corner of the concave portion is small, and it is difficult to obtain the desired effects of the present invention. Also,
If this difference is excessive with respect to the size of the packaging container, the deviation between the curved portion 1 at the corner of the convex portion and the curved portion 2 at the corner of the concave portion becomes large, and conversely, fitting becomes difficult. For example, an outer dimension produced by vacuum forming a polystyrene sheet having a thickness of about 0.18 mm conforming to food packaging standards has a long side of 19 cm and a short side of 12.5 mm.
cm, in the case of a continuously integrated container of a container A and a lid B for forming a substantially rectangular parallelepiped container having a height of 4.65 cm, it is preferable that r is 0.1 to 0.5 mm smaller than r ′, and Preferably, the diameter is reduced by 0.25 mm. The distance between the centers o and o 'of the radius of curvature is preferably 2 to 8 mm, and more preferably 3 mm.

Also, in the present invention, the shape, installation location, and number of the portions satisfying the condition that r is smaller than r 'and o is outside of o' at the time of fitting are as described above. Sometimes, the curved portion 1 at the corner of the convex portion presses the curved portion 2 at the corner of the concave portion from the inside to the outside of the packaging container, and if the fitting state of the container A and the lid B is maintained,
There is no particular limitation, and the size is appropriately set in accordance with the size and shape of the packaging container formed by the packaging container material of the present invention, the thickness and physical properties of the constituent materials, the form of the stored material, and the intended use. In particular, in the case of a packaging container which is formed continuously and integrally by sharing a hinge-like operating part, r is smaller than r 'and o
The portion that satisfies the condition that is outside the o 'at the time of fitting may be provided only in the curved portion at the corner farther from the hinge-shaped operation portion 3.

The packaging container material used in the present invention can be formed of various kinds of plastics, paper, metals such as aluminum, etc., and preferably a rigid or semi-rigid thermoplastic molding material is used. These plastic molding materials are processed into a film or sheet, and then thermoformed by a vacuum molding method, a pressure molding method, or the like, or the molding material is directly injection-molded to form a packaging container material. It can be easily mass-produced. Further, as the plastic molding material, for example, a material mainly composed of various thermoplastic resins such as a vinyl chloride resin, a polyolefin resin, a polystyrene resin, a polyester resin, a polyacrylic resin, and a polycarbonate resin. Can be used.

Further, the packaging container material of the present invention is molded so as to form various desired shapes such as a rectangular parallelepiped, a disk, a cylinder, an ellipse, a sphere, etc., of the packaging container assembled therefrom. You.

[0012]

Since the packaging container material of the present invention has the above-described structure, it contains the contents, closes the lid, and folds the lid and the body to fix it. Alternatively, it can be performed quickly and reliably by a procedure similar to that, and even when the lid is opened, the operation is extremely easy, and there is no shock to the contents and no damage to the container. It can be used over and over again. Also, the packaging container made of the packaging container material according to the present invention has high stability because the curved portion at the corner of the convex portion presses the curved portion at the corner of the concave portion from the inside to the outside of the packaging container at the time of fitting. A fitted state is obtained. Therefore, the packaging container using the packaging container material according to the present invention is extremely suitable not only for food products, but also as a packaging container for information equipment supplies such as small articles such as CDs.

[Brief description of the drawings]

FIG. 1A is an enlarged view showing a state in which a curved portion 1 at a corner of a convex portion and a curved portion 2 at a corner of a concave portion before fitting are overlapped, and FIG. It is an enlarged view which shows the state of parts 1 and 2.

FIG. 2 is a plan view showing an example of a packaging container material according to the present invention.

FIG. 3 is a sectional view of the packaging container material of FIG. 2;

FIG. 4 is an external view showing an example of a closed container formed according to the present invention.

FIG. 5A is a sketch illustrating a control product, and FIG.
FIG. 2 is an external view of a closed container formed therefrom.

FIG. 6A is a sketch illustrating a control product, and FIG.
FIG. 2 is an external view of a closed container formed therefrom.

[Explanation of symbols]

 r The radius of curvature of the curved portion 1 at the corner of the convex portion r 'The radius of curvature of the curved portion 2 at the corner of the concave portion o The center of the radius of curvature of the curved portion 1 at the corner of the convex portion o' The radius of curvature of the curved portion 2 at the corner of the concave portion A: Body B: Lid C: Closed container (contents already stored) 1 Curve at the corner of the convex part 2 Curve part at the corner of the concave part 3 Hinge-shaped operation part 4 Body-side flange-shaped part 5 Cover-side flange-shaped part 6 Heat-sealed part

Claims (6)

[Claims] 1. A package in which a container and a lid are fitted and fixed to a convex portion formed on one peripheral portion and a concave portion formed on the other peripheral portion, thereby forming a closed container. In the container material, the curvature radius r of the corner portion of the convex portion formed in the peripheral portion which is formed inside at the time of fitting is the curved portion of the corner of the concave portion formed at the peripheral portion formed outside at the time of fitting. And the center o of the radius of curvature of the curved portion at the corner of the convex portion is outside the center o 'of the radius of curvature of the curved portion at the corner of the concave portion when fitted. A packaging container material excellent in opening and closing operability, characterized in that: 2. The packaging container material according to claim 1, wherein the container and the lid share a hinge-like operation part and are integrally formed continuously. 3. The container body and the lid body are formed continuously and integrally by sharing a hinge-like operation part, and a convex part formed on one peripheral part and a concave part formed on the other peripheral part are formed. By fitting and fixing, in a packaging container material in which a closed container is formed, a curved portion of a corner of a convex portion formed in the peripheral portion which is inside at the time of fitting, on a side far from the hinge-like operation portion. Is smaller than the radius of curvature r 'of the curved portion at the corner farthest from the hinge-shaped operation portion of the concave portion formed in the peripheral portion which is outside at the time of fitting, and at the corner of the convex portion. A packaging container material excellent in opening and closing operability, characterized in that the center o of the radius of curvature of the portion is formed outside the center o 'of the radius of curvature of the curved portion at the corner of the concave portion when fitted. 4. The packaging container material according to claim 1, wherein the peripheral portion of the container has a convex shape and the peripheral portion of the lid has a concave shape. 5. A packaging container material having a hinge-like operating portion according to claim 1, which is used as a food container. 6. The container according to claim 1, wherein the body and the lid are formed of plastic.
Or the packaging container material according to claim 3.