JP3119601U - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost packaging container that can secure a floating height on the bottom surface and exhibit excellent buffering properties even when a load or its own weight acts from above.
SOLUTION: In a packaging container 1 formed of a plastic sheet having a thickness of 0.1 to 0.5 mm, a convex portion 3 protrudes downward on the bottom surface so that the bottom surface 2 of the packaging container 1 floats from the mounting surface. The reinforcing ribs 4 that are recessed inward of the packaging container 1 are formed along the diagonal direction of the bottom surface 2 on the contact surface of the convex portion 3 with the mounting surface 6, and the bottom surface 2 that is floated by the convex portion 3 is formed. The elasticity of the plastic sheet increases the buffering property of the container, and the convex portion 3 is not easily crushed by the reinforcing rib 4 when loaded.
[Selection] Figure 2

Description

  The present invention relates to a packaging container for storing articles such as fruits and other delicate parts that are easily damaged such as strawberries and loquat, and more particularly to a technique for protecting and storing articles at low cost without damage.

  Conventionally, as a packaging container that accommodates an easily damaged article, there is a structure in which the container is made of a thick soft material or a sheet material having a cushioning property is laminated on the inner side in contact with the container (for example, Patent Document 1). However, the former technique has a problem that the accommodation efficiency is poor because the space for accommodating the container is reduced. Further, the latter technique has a problem in that it is necessary to separately laminate sheet materials, and the cost increases due to an increase in materials and manufacturing processes.

Therefore, it is molded with a thin plastic sheet, and the bottom of the container is molded so that the convex part projects downward on the bottom so that the bottom of the container floats from the mounting surface. Patent Document 2 proposes a packaging container that can protect the contents by mitigating the impact by the displacement of the bottom surface. However, in this technique, the convex portion may be crushed by a load from above or the weight of the contained item, and in this case, the floating height of the bottom surface is lowered, and the contained item may be damaged by the bottom surface contacting the mounting surface. there were.
Japanese Utility Model Publication No. 6-44789 JP 2004-345713 A

  The problem to be solved by the present invention is that these conventional problems can be solved, and even if the load from the top or the weight of the contained material acts, the floating height of the bottom surface can be secured and excellent buffering can be exhibited. It is to provide a low-cost packaging container.

The configuration of the present invention that solves this problem is as follows.
1) In a packaging container molded with a thin plastic sheet, the container is formed on the contact surface of the projecting portion with the mounting surface of the projecting portion so that the projecting portion projects downward on the bottom surface so that the bottom surface of the container floats from the mounting surface. The reinforcing ribs that are recessed inwardly of the molding are molded, and the bottom surface that is floated by the convex portions is made of a plastic sheet to increase the cushioning property of the contained material, and the convex portions are hard to be crushed by the reinforcing ribs when loaded. Container 2) The packaging container 3) according to 1) above, wherein the convex portions on the bottom surface are formed at the four corners, and the reinforcing ribs are formed on the concave stripes along the diagonal direction of the bottom surface. 3) The floating height of the bottom surface is 3 The packaging container according to 1) or 2) above, wherein the long side length of the bottom surface is in the range of 8 to 12 cm in the range of ˜12 mm, and the thickness of the plastic sheet constituting the container is 0.1 to 0.5 mm. Any of the above 1) to 3) 5) The packaging container according to any one of 1) to 4) above, wherein the material of the plastic sheet constituting the container is selected from polystyrene resin, polyethylene terephthalate resin, and polypropylene resin.

  According to the present invention, the convex portion formed on the bottom surface causes the bottom surface to float slightly when placed. Even if the container's own weight or other impact during transportation is applied to the container, the plastic sheet is displaced up and down by the elasticity of the plastic sheet, and the impact is relieved by this displacement and the container is protected without bottoming out. In addition, the pre-cooling effect of the article is increased by the space below the floated bottom surface. Furthermore, even if a load acts from above the container or container having a weight, the convex portion is not easily crushed by the reinforcing rib, and the flying height of the bottom surface can be ensured to prevent the article from being damaged.

  The convex portions on the bottom surface of the present invention are generally formed at the four corners, but depending on the size of the container, other portions including the four corners are formed as necessary. Various shapes such as a circular shape and an L shape are used as the shape of the convex portion. Reinforcing ribs are formed into concave stripes in the diagonal direction of the bottom surface so that a reinforcing surface can be secured as much as possible within a limited area.

  The plastic sheet constituting the container was selected from oriented polystyrene (OPS: trade name), high impact polystyrene (trade name), polyethylene terephthalate resin, and polypropylene resin with a thickness in the range of 0.1 to 0.5 mm. Is generally used. As the bottom surface floating height, a practical range is 3 to 12 mm and the long side length of the bottom surface is 8 to 12 cm. Embodiments of the present invention will be specifically described below with reference to the drawings.

  The embodiment shown in FIGS. 1 to 3 is an example in which the present invention is applied to a strawberry pack containing strawberry. FIG. 1 is a plan view of the packaging container of the embodiment, FIG. 2 is an explanatory view of a convex portion and a reinforcing rib of the packaging container of the embodiment, and FIG. 3 is a cross-sectional view taken along line AA of FIG. In the figure, 1 is a packaging container, 2 is a bottom surface, 3 is a convex part, 4 is a reinforcing rib, 5 is a rib, 6 is a mounting surface, and A is a strawberry.

  As shown in FIG. 1, the packaging container 1 of this example is a plastic sheet made of oriented polystyrene (OPS: a kind of expanded polystyrene resin) having a thickness of 0.25 mm, a long side length of 117 mm, a short side length of 72 mm, a depth of As shown in FIG. 2, pressure molding is performed so that a bottom surface 2 having a thickness of 43 mm is formed, and L-shaped convex portions 3 having a depth of 5 mm are protruded downward at four corners of the bottom surface 2. Reinforcing ribs 4 are formed along the diagonal direction of the bottom surface 2 respectively.

  Since the packaging container 1 of the present embodiment is configured as described above, the bottom surface 2 is slightly lifted by the convex portions 3 formed on the bottom surface 2 when placed on the placement surface 6 as shown in FIG. . When the strawberry A is stored in the packaging container 1, the plastic sheet is displaced up and down by the elasticity of the plastic sheet even if its own weight or an impact during transportation is applied, and the impact is reduced by this displacement and the stored strawberry A is bottomed out. Protect without doing.

  Moreover, since each convex portion 3 is reinforced by the reinforcing rib 4 and has a shape in contact with the mounting surface 6 at a plurality of points, the convex portion 3 is not easily crushed even when a strong load is applied, and the bottom surface 2 is displaced. Secure floating height to prevent bottoming. As described above, according to the present embodiment, it is possible to provide a packaging container 1 that can be manufactured at a lower cost than the conventional one, and that is superior in cushioning and does not sacrifice the accommodation efficiency.

  The packaging container of the present invention is useful for applications such as strawberry and loquat that are easily damaged and other precision parts.

It is a top view of the packaging container of an Example. It is explanatory drawing of the convex part and reinforcing rib of the packaging container of an Example. It is AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Bottom surface 3 Convex part 4 Reinforcement rib 5 Rib 6 Mounting surface A Strawberry

Claims (5)

  In a packaging container molded with a thin plastic sheet, the bottom of the container is molded so that the convex part protrudes downward on the bottom so that the bottom of the container floats from the placement surface, and the inner surface of the container is in contact with the placement surface of the convex part A packaging container characterized in that a reinforcing rib that is recessed in a direction is formed, and the bottom surface that is floated by the convex portion is made elastic by the plastic sheet to increase the buffering property of the container, and the convex portion is hardly crushed by the reinforcing rib when loaded.   The packaging container according to claim 1, wherein the convex portions on the bottom surface are formed at four corners, and the reinforcing ribs are formed into concave grooves along the diagonal direction of the bottom surface.   The packaging container according to claim 1 or 2, wherein the bottom surface has a flying height of 3 to 12 mm and the bottom surface has a long side length of 8 to 12 cm.   The packaging container in any one of Claims 1-3 whose thickness of the plastic sheet which comprises a container is a thing of the range of 0.1-0.5 mm.   The packaging container in any one of Claims 1-4 whose raw material of the plastic sheet which comprises a container is chosen from polystyrene resin, polyethylene terephthalate resin, and polypropylene resin.

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