JP2014227185A - Lid for food packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid for a food packaging container which prevents dust and the like from entering a container, in comparison with those of conventional ones.SOLUTION: A lid 1 for a food packaging container is formed of a thermoplastic synthetic resin sheet, has a top plate portion 2 and a peripheral wall portion 3 provided on the periphery thereof, and has a ventilation portion 4 provided on the surface of the peripheral wall portion 3. The ventilation portion 4 can be formed as a notch or a hole, and is preferably formed as an U-shaped notch.

Description

  The present invention relates to a lid for a food packaging container, which is made of a thermoplastic synthetic resin sheet and can heat the contents in a microwave oven or the like.

At retail stores such as supermarkets, department stores, and convenience stores, many food items such as lunch boxes, side dishes, and noodles such as pasta are packed in food packaging containers and displayed.
Examples of food packaging containers include those manufactured by thermoforming a thermoplastic synthetic resin sheet made of PET, polystyrene, polypropylene, or the like, such as vacuum forming or pressure forming. Some of such food packaging containers are provided with a ventilation portion made of holes, cuts, etc. in the top plate portion of the lid so that the lid can be heated with a microwave oven or the like so that steam or the like can escape. .

  For example, in the following Patent Document 1, in the lid of a packaging container for cooking made of thermoplastic synthetic resin, two pieces cut out by two annular cut lines that are discontinuous at two positions that are symmetrical to each other. Disclosed is a lid for a cooking container for cooking which is characterized in that a tongue piece is formed on the top surface of the lid, which prevents foreign matter such as dust and insects from entering the container before heating, Accumulation of generated heat and steam in the container can be prevented to prevent deformation of the container, deterioration of the contents, burnout, and deterioration of taste.

  In addition, the following Patent Document 2 is formed of a molded body of a thermoplastic synthetic resin sheet, and the top plate portion is formed with a desired shape tongue piece portion by making a cut leaving a connecting portion connected to the top plate portion, A lid of a packaging container that covers the container body and closes the opening, wherein the cut is extended at least in one end direction, and is applied to the end of the cut when the tongue piece receives an external force in the folding direction. A lid of a packaging container having a tail portion that disperses tear propagation force in different directions is disclosed, which makes it difficult to break the tongue piece portion.

Japanese Utility Model Publication No. 4-38984 JP 2007-191161 A

When food packaging containers are stacked and displayed in a plurality of stages, the top plate of the lid is easily deformed because it receives a load. As in the prior art, a lid provided with a ventilation portion such as a hole or a cut in the top plate portion has a risk that the ventilation portion is deformed due to the deformation of the top plate portion and the gap becomes large, so that dust or the like may enter the container. .
In addition, for example, a container such as a lunch box has a lid made of a transparent material so that the inside can be visually recognized. However, when a plurality of ventilation portions are provided in the top plate portion, the visibility is obstructed by the ventilation portions, and it may be difficult to confirm the contents.
Furthermore, recently, food packaging containers have a tendency to be thinned in order to reduce the amount of materials used, and there is a high possibility that the ventilation portion is deformed.

  Accordingly, an object of the present invention is to provide a lid for a food packaging container in which dust or the like is less likely to enter the container as compared with the conventional case.

  The lid of the food packaging container of the present invention is a food packaging container lid comprising a thermoplastic synthetic resin sheet and having a top plate portion and a peripheral wall portion around the top plate portion, on the surface of the peripheral wall portion. A vent is provided.

  The ventilation portion can be formed as a cut or a hole, and is preferably formed as a U-shaped cut.

  The peripheral wall portion preferably has an inclination angle of 45 ° to 90 °. Moreover, it is preferable that the said surrounding wall part has a reinforcement part which dented the surface part inside.

  By adopting such a configuration, the peripheral wall portion is less likely to accumulate dust and the like than the top plate portion, so that it is difficult for dust and the like to enter the container as compared to the conventional case. Further, since the peripheral wall portion is less likely to be deformed than the top plate portion, the ventilation portion is difficult to deform, and dust or the like is less likely to enter the container.

It is a perspective view of the lid | cover of the container for food packaging of one Embodiment of this invention. FIG. 2 is a side view of the lid and the container body shown in FIG. FIG. 6 is a side view showing a modified example of the lid shown in FIG. It is the side view which showed the other modification of the lid | cover shown in FIG. It is the side view which showed the other modification of the lid | cover shown in FIG.

  Hereinafter, an embodiment of a packaging container of the present invention will be described based on the drawings.

  As shown in FIG. 1 or 2, the lid 1 of the food packaging container according to the embodiment of the present invention is made of a thermoplastic synthetic resin sheet, and includes a top plate portion 2 and a peripheral wall portion 3 around the top plate portion 2. The ventilation portion 4 is provided on the surface of the portion 3.

The lid 1 can cover the upper surface opening of the container body 5 to form a food packaging container 6. The food packaging container 6 is a heat-resistant container that wraps food or the like and can be heated in a microwave oven, etc., such as a lunch box container, a container for prepared meals, a container for storing noodles such as pasta, etc. Can be used as
In this embodiment, the lid 1 is formed so that it can be fitted to the container body 5, but the lid 1 is not limited to this, and may be fitted inside, or via a hinge or the like. And may be formed integrally with the container body 5.
The lid 1 can be manufactured, for example, by thermoforming a thermoplastic synthetic resin sheet having a sheet thickness of 15 μm to 50 μm, preferably 20 μm to 30 μm. More specifically, thermoplastic resin sheets such as polystyrene resin sheets, polyethylene resin sheets, polypropylene resin sheets, and polyethylene terephthalate resin sheets are subjected to thermoforming such as vacuum forming, pressure forming, vacuum pressure forming, and hot plate forming. Can be manufactured. The lid 1 is not particularly limited, but is preferably transparent or translucent, and the container body 5 is not particularly limited, but is preferably colored such as black or white.

  In the present embodiment, the lid 1 is formed in a rectangular shape in plan view, but is not limited thereto, and may be formed in a square shape in a plan view, a circular shape, an oval shape, or the like. When the lid 1 is formed in a square or rectangular shape in plan view, for example, it is preferably formed in a length of about 8 cm to 35 cm × width of 8 cm to 35 cm, particularly about 15 cm to 30 cm × width of 15 cm to 30 cm. The ratio is preferably formed to be about 1: 1 to 1: 5.

  In the present embodiment, the top plate portion 2 is formed as a rectangular horizontal surface in plan view with the central portion of the lid 1 raised one step. The shape of the top plate portion 2 is not limited to this, and can be formed into a square shape, a circular shape, an oval shape, etc. in plan view, and a similar shape that matches the outer shape of the lid 1. preferable. Moreover, the top plate part 2 can also be formed as an inclined surface. For example, the top plate 2 is preferably formed in an area ratio of 50% to 95%, particularly 70% to 90% with respect to the area of the lid 1 in plan view.

In this embodiment, the peripheral wall portion 3 is formed so as to be linearly inclined outwardly from each outer edge around the top plate portion 2 and to be formed of four planes. The inclination angle of the peripheral wall 3 is not particularly limited, but is preferably 45 ° to 90 °, particularly preferably 60 ° to 80 °.
The height of the peripheral wall portion 3 is not particularly limited, but is preferably 5 to 50%, particularly 10 to 30%, with respect to the length of the longitudinal width of the lid 1, specifically, It is preferable to form in 5 mm-50 mm, especially 15 mm-30 mm.
It is preferable to form a reinforcing portion 3 a having the surface portion recessed inward in the surface or corner portion of the peripheral wall portion 3. By providing the reinforcement part 3a, the surrounding wall part 3 becomes difficult to be crushed. In the present embodiment, the reinforcing portion 3a is recessed in a rectangular cross section, but is not limited to this, and can be recessed in a curved cross section, V cross section, or the like.

The ventilation part 4 can pass through steam or the like in the container 6. In the present embodiment, the ventilation part 4 is formed as a U-shaped notch 4 a and is formed on each surface of the peripheral wall part 3 on the short side of the lid 1. Two places are formed each. The shape of the notch 4a is not limited to this, and may be formed in a straight line shape, an X shape, a U shape, or a V shape, and a horizontal U shape as shown in FIG. You may form in the cut 4b and the reverse U-shaped cut 4c. In order to make it difficult for dust to enter, it is preferable to make a U-shaped cut. When the ventilation part 4 is formed as a U-shaped, U-shaped or V-shaped notch, the tongue portion is formed with a width of 3 mm to 15 mm, particularly 7 mm to 12 mm, and a height of 5 mm to 20 mm, especially 10 mm. It is preferable to form in ~ 15mm.
Further, the ventilation portion 4 may be formed as a circular hole 4d as shown in FIG. The shape of the hole is not limited to a circular hole, and may be any hole shape such as a square hole or a long hole. When forming the ventilation part 4 in a hole shape, it is preferable to form in width 2mm-10mm, especially 3mm-8mm.

  In the present embodiment, the positions and the number of the ventilation portions 4 are formed in two symmetrical positions in the plane, but the present invention is not limited to this, and one or more locations may be formed on the surface of the peripheral wall portion. What is necessary is just to form 1-12 places in the lid | cover 1, especially 2-4 places. When forming two or more places, it is preferable to form it on a diagonal line.

  At the lower end portion of the peripheral wall portion 3, a flange portion 7 projecting outward in a horizontal shape is formed, and a fitting portion 8 hanging from the outer edge portion of the flange portion 7 is formed. It can be fitted outside.

Since the lid 1 has the ventilation portion 4 formed in the peripheral wall portion 3, the peripheral wall portion 3 is less likely to accumulate dust and the like than the top plate portion 2, and dust and the like are less likely to enter the container as compared to the conventional case. Further, since the peripheral wall portion 3 is usually smaller in area than the top plate portion 2 and is not easily deformed, the ventilation portion 4 is hardly deformed and dust or the like is less likely to enter the container 6.
This is particularly effective for large food packaging containers.
When the lid 1 is made of a transparent or translucent material, the contents can be easily confirmed from the top plate portion 2 even if a plurality of ventilation portions 4 are provided.

  The configuration aspect of the above embodiment is not intended to limit the present invention, but can be changed as long as the technical purpose is common, and the present invention includes such a change.

DESCRIPTION OF SYMBOLS 1 Cover of food packaging container 2 Top plate part 3 Circumferential wall part 3a Reinforcement part 4 Ventilation part 4a-4c cutting 4d Circular hole 5 Container body 6 Food packaging container 7 Flange part 8 Fitting part

Claims (6)

  A food packaging container lid comprising a thermoplastic synthetic resin sheet and having a top plate portion and a peripheral wall portion around the top plate portion, the food packaging container lid having a ventilation portion on the surface of the peripheral wall portion .   2. The lid of the food packaging container according to claim 1, wherein the ventilation portion is a cut or a hole.   The lid of the food packaging container according to claim 1, wherein the ventilation portion is a U-shaped cut.   The said surrounding wall part is a lid | cover of the container for food packaging in any one of Claims 1-3 which formed the inclination | tilt angle in 45 degrees-90 degrees.   The said surrounding wall part is a lid | cover of the container for food packaging in any one of Claims 1-4 which has the reinforcement part which dented the surface part inside.   The food packaging container using the lid | cover of the food packaging packaging container in any one of Claims 1-5.

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