JP2006044758A - Food packaging double container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food packaging container used as for displaying and selling various kinds of food by storing it in the container, in particular, a double-structure food packaging container comprising an inner container and an outer container, in which the inner container and the outer container are easily and securely fixed to each other, without spoiling the appearance of the container, such that they are prevented from being displaced one from the other. <P>SOLUTION: The food packaging double container comprises the inner container 1 and the outer container 2, which are thermally molded out of a synthetic resin sheet and disposed such that the inner container 1 is accommodated in the outer container 2. In the food packaging double container, with the inner container 1 accommodated in the outer container 2, the height of the upper face 11 of the outer peripheral edge 10 of the inner container 1 is almost the same as that of the upper face 21 of the peripheral edge 20 of the outer container 2 or slightly less than that. Additionally, locking projections 24 or/and recesses 25, with which at least parts of the peripheral edges 10 of the inner container 1 engage, are formed on or near the peripheral edge 20 of the outer container 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a food packaging container used for storing and selling various foods, and more particularly to a double-structured food packaging container comprising an inner container and an outer container.

  Conventionally, in a food packaging container having a double structure as described above, it is common to prevent the inner container and the outer container from being misaligned and separated by some means so that the inner container and the outer container are not inadvertently displaced or separated. For example, a method of fitting and fixing the outer peripheral edge portion of the inner container to the outer peripheral edge portion of the outer container as in Patent Document 1 below has been proposed.

  However, as in the above-mentioned Patent Document 1, when the outer peripheral edge portion of the outer container is fitted and fixed to the outer peripheral edge portion of the outer container, the inner container and the outer container are inadvertently shifted if the fitting is weak. If the fitting is strong, it takes a long time to fit, or even a slight manufacturing error makes it impossible to fit. Further, when the outer peripheral edge of the inner container is fitted to the outer peripheral edge of the outer container, the outer peripheral edge of the outer container is hidden, and for example, the outer container cannot be seen from above even if it is decorated, There was a problem that the color of the outer container could not be changed to create a sense of quality.

  Therefore, for example, a structure in which a step is provided on the side wall portion of the outer container and the outer peripheral edge portion of the inner container is placed on the above step to be positioned and fixed has been proposed and used. However, as described above, when the step is provided on the side wall of the outer container and the outer peripheral edge of the inner container is placed, the outer peripheral edge of the outer container is not hidden, but the step on the side wall of the outer container is not hidden. In some cases, the appearance and appearance may be impaired or not preferred. In addition, since the outer peripheral edge of the inner container is only on the step, for example, when used as a lunch box, the inner container can be easily removed by applying force to the inner container with chopsticks or the like during meals. There was a problem of shifting.

Japanese Utility Model Publication No. 3-64217

  The present invention has been proposed in view of the above-mentioned problems, and provides a double container for food packaging that can easily and reliably hold and fix an inner container and an outer container without impairing the appearance. For the purpose.

  In order to achieve the above object, the double container for food packaging according to the present invention has the following configuration. That is, in a double container for food packaging, which is composed of an inner container and an outer container each thermoformed from a synthetic resin sheet, and the inner container is accommodated in the outer container, the inner container is placed in the outer container. In the accommodated state, the upper surface of the outer peripheral edge of the inner container is made substantially equal to or slightly lower than the upper surface of the outer peripheral edge of the outer container, and at least a part of the outer peripheral edge of the inner container is engaged. The engaging convex part or / and concave part which match is provided in the outer peripheral edge part of the outer container.

  In the state where the inner container is accommodated in the outer container as described above, the upper surface of the outer peripheral edge of the inner container is made substantially equal to or slightly lower than the upper surface of the outer peripheral edge of the outer container. When the outer peripheral edge of the outer container is provided with a locking convex part or / and a concave part that engages with at least a part of the outer peripheral edge of the outer container, the upper surface of the inner container and the outer container are substantially at the same height. Can be fixed easily and securely.

  Therefore, although it can be configured so that both the outer peripheral edge top surface of the outer container and the outer peripheral edge top surface of the inner container can be seen when viewed from above or obliquely above in a state where the inner container and the outer container are combined, There is no need to provide a step on the side wall portion of the outer container, and it is possible to eliminate an unfavorable configuration in terms of design.For example, when the inner container and the outer container are changed in color, the inner container is red, and the outer container is black. When the inner container and the outer container are combined, the upper surface of each outer peripheral edge portion can be seen simultaneously with red and black, and the appearance is good. Further, for example, even when used as a lunch box or the like, it is possible to provide an easy-to-use double container for food packaging without causing the inner container to shift even if force is applied to the inner container during a meal.

  As the synthetic resin sheet for molding the inner container and the outer container, it is most preferable to use a non-foamed sheet. For example, a foamed sheet may be used to change the image of the container surface. The expansion ratio is 4 times or less, preferably 3 times or less. The reason is that, for example, when a foamed polystyrene sheet having a normal foaming ratio exceeding 10 times after thermoforming is used as an outer container, it is difficult to form an uneven part on the inner surface of the outer peripheral edge of the outer container. However, there is a problem that the details of the shape are difficult to form with sufficient precision. In addition, it is more difficult to precisely form a groove or the like on the inner surface of the outer peripheral edge of the outer container. In addition, even if the inner container is formed using the same expanded polystyrene sheet as described above, there is a problem that it is difficult to mold sufficiently finely to engage with the concavo-convex portion of the outer container. However, if the expansion ratio is set to 4 times or less, preferably 3 times or less as described above, fine molding that is likely to occur when a container is formed with a foamed polystyrene sheet having a normal expansion ratio exceeding 10 times after thermoforming. This is because the problem of the state can be avoided.

  Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings. FIG. 1 is a perspective view showing an embodiment of a double container for food packaging according to the present invention, FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, and FIG.

  The double container for food packaging of the present embodiment is composed of a substantially red inner container 1 and a substantially black outer container 2, and each container 1, 2 is substantially planar by thermoforming a synthetic resin sheet. Although it is formed in a rectangular flat bowl shape, the shape is appropriate, and as a synthetic resin sheet to be used, for example, commonly used polystyrene, polyethylene, polypropylene, polyester, other Synthetic resins can be used alone or in combination.

  The outer peripheral edge portions 10 and 20 of the containers 1 and 2 are substantially horizontal upper surface portions 11 and 21 provided integrally with the upper end portions of the container side surfaces 1a and 2a, and hanging portions provided integrally with the outer end portions thereof. The sections 12 and 22 are each formed in a substantially U-shaped cross section, and projecting edges 13 and 23 protruding outward in a substantially horizontal direction are integrally provided at the lower ends of the hanging parts 12 and 22, respectively. In FIG. 2, 1b and 2b are the bottoms of the inner container 1 and the outer container 2, respectively. Thus, the upper surface portion 11 of the outer peripheral edge portion 10 of the inner container 1 is formed to be substantially the same height as the upper surface portion 21 of the outer peripheral edge portion 20 of the outer container 2. The upper surface portion 11 of the inner container 1 may be slightly lower than the upper surface portion 21 of the outer container 2.

  And this embodiment provides the convex part 24 for the latching which the at least one part of the outer periphery part 10 of the inner container 1 engages in the outer periphery part 20 of the outer container 2, and in the case of a figure, the said outer side Protrusions 24 made of ridges having a predetermined length in the longitudinal direction of the peripheral edge 20 are provided so as to protrude inward of the container at the corners of the upper surface 21 and the hanging part 22 of the outer peripheral edge 20. It is a configuration. In the present embodiment, the convex portion 24 is provided at two locations on the outer peripheral edge portion 20 on the long side of the outer container 2 having a substantially rectangular plane, and on the outer peripheral portion 20 on the short side, one each. This is a configuration in which the protrusion 13 provided on the outer peripheral edge portion 10 of the inner container 1 abuts and engages with the convex portion 24 to prevent the inner container 1 from being detached above the outer container 2.

  In housing the inner container 1 in the outer container 2 configured as described above, the inner container 1 is placed with the outer peripheral edge 10 of the inner container 1 placed inside the outer peripheral edge 20 of the outer container 2. When the outer peripheral edge portion 10 of the inner container 1 is pushed downward, the protruding edges 13 provided on the outer peripheral edge portion 10 of the inner container 1 push the respective convex portions 24 of the outer container 2 outward, and the protruding edges 13 are also moved into the container. It bends to the side and moves to the lower side than the above-mentioned convex portions 24. As a result, the protruding edge 13 is brought into contact with and engaged with each of the convex portions 24, and the inner container 1 is prevented from being disengaged above the outer container 2, and can be easily and reliably prevented from coming off. It is something that can be done.

  In the state where the inner container 1 is accommodated in the outer container 2, the upper surface of the outer peripheral edge portion 10 of the inner container 1, in the case of the figure, the upper surface portion 11 is the upper surface of the outer peripheral edge portion 20 of the outer container 2, In the case of the figure, since it is configured to be substantially the same as or slightly lower than the upper surface portion 21, the appearance and appearance when viewed from above or obliquely upward are good, and the surface of the outer container is decorated. Even in this case, the decoration applied to the outer peripheral edge portion 10 at the top thereof is not hidden. Further, when the inner container 1 is colored red and the outer container 2 is colored black or the like as in the above-described embodiment, the outer peripheral edge portion 20 becomes an inner / outer double two-tone color and can give a high-class feeling.

  In the above-described embodiment, the locking convex portion 24 of the outer container 2 is formed as a convex strip having a predetermined length in the longitudinal direction of the outer peripheral edge portion 20 of the outer container 2. . Alternatively, a concave line such as a groove or a dot-like depression or a hole may be used instead of the convex part 24 as described above, and both the convex part and the concave part may be provided. In addition, the arrangement position, the number of arrangement, and the like of the projections or depressions can be changed as appropriate. Furthermore, the site | part, shape, etc. of the outer peripheral edge part 10 of the inner container 1 engaged with the said convex part or recessed part are also appropriate.

FIG. 4 shows an example of a change in the location and shape of the convex portion 24 or the concave portion and the outer peripheral edge portion 10 of the inner container 1 engaged therewith. FIG. 24 shows an example in which the corners of the upper surface portion 11 and the drooping portion 12 of the inner container 1 are engaged. FIG. 5B shows the upper surface of the inner container 1 on the locking convex portion 24 of the outer container 2. An example in which the concave portion 14 formed at the corner portion of the portion 11 and the hanging portion 12 is engaged, FIG. 5C shows the concave portion 25 formed on the upper portion of the side surface 2 a in the vicinity of the outer peripheral edge portion 20 of the outer container 2. In this example, a part or all of the protruding edge 13 of the inner container 1 is engaged with the recess 25.

  The above-mentioned double container may be provided with a lid as required. For example, when the food is displayed and sold in the container, it is preferably provided with a transparent or translucent lid. In that case, at least one of the inner container and the outer container may be transparent or semi-transparent, and at least one of the inner container and the outer container and the lid may be formed of the same material, or may be integrally formed. You can also Alternatively, wrap packaging or the like may be performed without using a lid.

  As described above, according to the double container for food packaging according to the present invention, for example, a one-way lunch box with a red inner container and a black outer container covered with a transparent lid manufactured by molding a polyethylene terephthalate sheet In this case, it is possible to realize a good color balance outer periphery when viewed from obliquely above at the time of exhibition display, and even when food is actually put in and eaten with chopsticks, the displacement of the inner container is completely It does not occur, and an extremely good display effect and use effect can be obtained, and there is an advantage that the degree of freedom in selecting the use and design of this type of container can be increased.

The perspective view which shows one Embodiment of the double container for food packaging by this invention. The AA line expanded sectional view in FIG. FIG. 3 is an enlarged view of a part of FIG. 2. (A)-(c) is a partial expanded sectional view which shows the example of a change.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner container 2 Outer container 1a, 2a Container side surface 10, 20 Outer peripheral edge part 11 21 Upper surface part 12, 22 Hanging part 13, 23 Projection edge 24 Convex part 25 Concave part

Claims (2)

  Each double container for food packaging is composed of an inner container and an outer container that are thermoformed from a synthetic resin sheet, and the inner container is accommodated in the outer container, and the inner container is accommodated in the outer container. In this state, the upper surface of the outer peripheral edge of the inner container is made substantially equal to or slightly lower than the upper surface of the outer peripheral edge of the outer container, and at least a part of the outer peripheral edge of the inner container is engaged. A double container for food packaging, wherein a locking convex part or / and a concave part are provided at or near the outer peripheral edge of the outer container.   The double container for food packaging according to claim 1, wherein the synthetic resin sheet is a non-foamed synthetic resin sheet or a foamable synthetic resin sheet having a foaming ratio of 4 times or less.

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