JP2013212870A - Packaging container for food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of achieving unchanged finger friction prevention effects even if some deviation occurs without requiring strict accuracy when a master roll sheet for production is cut into individual packaging containers for food, in the packaging containers for food that store food.SOLUTION: A plurality of recessed holes 31 are extensively formed on one surface of a flange 15 extending outwardly from a sidewall 12 to make both surfaces of the flange 15 rough. An end face of the flange 15 is constituted as a mixed cut face formed of recessed cut portions 32 that cut the recessed holes 31 and horizontal cut portions 33 that do not cut the recessed holes 31.

Description

  The present invention relates to a food packaging container for storing vegetables, meats, prepared vegetables and the like used for sale or take-out.

Food packaging containers that are used in convenience stores and supermarkets and store vegetables, meat, and prepared foods for sale are molded from a synthetic resin sheet and a transparent synthetic resin sheet. It is comprised from the cover body which covers a main body.
Since the end of such a food packaging container is formed by punching a hard resin sheet, the cut surface is a sharp straight line, and if a human hand or finger is rubbed along its longitudinal direction, it will be cut. The possibility has been pointed out. From this point of view, for example, registered utility model No. 3044932 (Patent Document 1) describes a technique of providing unevenness in the vertical direction so that the end portion is not linear.

Registered Utility Model No. 3044932

In the technique described in the registered utility model No. 3044932, when the end portion of the food packaging container is corrugated and uneven, when the raw sheet for manufacturing the food packaging container is cut into individual food packaging containers The part which gave the uneven | corrugated process appears as a wavy cut surface. Therefore, this wavy cut surface prevents the fingers from rubbing, but if the cut portion to be cut into individual food packaging containers is shifted, the wave shape of the end portion changes, so the effect of preventing rubbing may change. There was sex. For this reason, it is considered that strict accuracy is required for uneven processing and cut portions.
Therefore, the present invention enables a manufacturing with a margin without demanding strict accuracy requirements, and provides a technology that does not change the effect of rubbing even if there is a slight deviation in the degree of uneven processing and the cutting location. It was made for the purpose.

  That is, for a food packaging container for containing food, a plurality of concave holes are formed on one surface of a flange portion extending outward from the side wall to make both surfaces of the flange portion rough and vertical. Provided is a food packaging container characterized in that the end surface is configured as a mixed cut surface formed by a concave cut portion that cuts a concave hole and a horizontal cut portion that does not cut the concave hole.

  Since the concave hole is formed on the one surface of the flange portion, it is only necessary to form a convex mountain or a concave hole in the mold corresponding thereto, so that the mold can be easily formed. Since the concave hole provided in the flange portion makes both surfaces of the flange portion rough, if the concave hole is cut in the vertical direction, an end surface with undulations in the vertical direction can be obtained. And since a plurality of concave holes are formed vertically and horizontally, it is possible to cut any of the plurality of concave holes even if the cutting line for cutting the flange portion is shifted in any of the front, rear, left and right directions, and the cutting with waviness up and down A surface can be formed. And since the end surface of a flange part is comprised as a mixed cutting surface formed by the concave cutting part which cut | disconnects a concave hole, and the horizontal cutting part which does not cut | disconnect this concave hole, a cutting surface with a wave | undulation up and down is obtained. Moreover, since the horizontal cutting part which does not cut | disconnect a concave hole is provided, it is sufficient to provide a concave hole partially in a flange part, and it is easy to process it, and can suppress | limit the resin modification | denaturation by a deformation as much as possible. And since it has such a mixed cut surface in the flange part edge part, rubbing of fingers etc. can be prevented effectively.

Of the concave cut portion and the horizontal cut portion that appear on the end face of the flange portion, the maximum length of the horizontal cut portion can be 5 mm or less. Even if a horizontal end portion appears on the end surface of the flange portion, the maximum length is 5 mm or less, so that it is not long enough to rub and scratch the fingers, and has an effect of preventing rubbing.
Moreover, it can be set as the packaging container for foodstuffs in which another one concave hole adjoining in the direction away from a side wall with respect to one concave hole is formed diagonally with respect to a side wall. Another concave hole that is adjacent in the direction away from the side wall with respect to the one concave hole is formed obliquely with respect to the side wall, so that the cutting line that cuts the flange portion is front, rear, left, and right from a predetermined position. Even if it is slightly deviated, a mixed cut surface having the same degree of unevenness can be formed.

  Furthermore, in a food packaging container for containing food, a plurality of concave holes are formed vertically and horizontally on both the upper and lower surfaces of the flange portion extending outward from the side wall to roughen both surfaces of the flange portion. The end surface of the flange portion includes an upper concave cutting portion that cuts the concave hole on the upper surface of the flange portion, a lower concave cutting portion that cuts the concave hole on the lower surface of the flange portion, and a central cutting portion that cuts the central portion without the concave hole. Provided is a food packaging container configured as a mixed cut surface to be formed.

  Since the plurality of concave holes that make the both surfaces of the flange portion rough are provided on both the upper surface and the lower surface of the flange portion vertically and horizontally, unevenness within the thickness of the flange portion can be provided. Therefore, modification of the resin due to deformation can be suppressed as much as possible. In addition, since the flange portion itself is not uneven, it is difficult for the cut surface to change due to the shift of the cut portion that cuts the flange portion. Then, the end surface of the flange portion is formed by an upper concave cutting portion that cuts the concave hole on the upper surface of the flange portion, a lower concave cutting portion that cuts the concave hole on the lower surface of the flange portion, and a central cutting portion that cuts the central portion without the concave hole. Therefore, a flat cut surface having minute irregularities on the upper and lower surfaces can be obtained. And since it has such a mixed cut surface in the flange part edge part, rubbing of fingers etc. can be prevented effectively.

A part of the end face of the flange portion can be formed as a mixed cut surface. This is because it is considered that it is not always necessary to provide a processing edge that forms a mixed cut surface in a portion where fingers or the like do not normally hit when the food packaging container is opened and the food is taken out.
As an example, the mixed cut surface can be provided around the corner of the frame-like flange portion in plan view. This is because this part is considered to be touched most by fingers. On the other hand, the corners of the frame-like flange portion are also arc-shaped and are not easily rubbed. Moreover, it is difficult to open the food packaging container from the central part of the frame-like long side or short side surface, and it is considered that rubbing of fingers with this part hardly occurs.

  According to the food packaging container of the present invention, it is difficult to cause scratches or the like even if a finger touches the end. Moreover, in the manufacturing process of the food packaging container, it is possible to provide a margin for the degree of unevenness processing and the dimensional accuracy of the cut portion, and a food packaging container having an excellent yield can be obtained.

It is a top view of the packaging container for foodstuffs. It is a front view of FIG. It is explanatory drawing which expands and shows the case where the flange part periphery is visually recognized from the upper part. It is an end view of the flange part of FIG. It is a partial end elevation of the flange part which shows another aspect of a flange part.

Embodiments of the present invention will be described with reference to the drawings. In addition, about description of a modification, duplication description is abbreviate | omitted about a common structure, material, a manufacturing method, an effect, etc.
1 and 2 show a food packaging container 1 suitable for housing vegetables, meats, prepared dishes, confectionery, bread and the like. The food packaging container 1 wraps food with a container main body 10 that contains food and a lid 20 that is attached to the container main body 10. The food packaging container 1 shown in FIG. 1 is a food packaging container in which the container main body 10 and the lid 20 are integrated with each other with the hinge portion 2 interposed therebetween. In that case, each of the container main body 10 and the lid 20 is a food packaging container.

The container body 10 includes a bottom portion 11 on which food is placed and a side wall 12 that rises upward from the periphery of the bottom portion 11 and is formed in a dish shape that is substantially rectangular in plan view.
The side wall 12 has a lid body receiving portion 13 joined to the lid body 20 at the upper end thereof, and a flange portion 15 extending from the lid body receiving portion 13 in a bowl shape in the horizontal direction. The end face of the flange portion 15 is a processed edge having irregularities, and the irregularities make it difficult for fingers to rub and injury. This processed edge is obtained by cutting a sheet-like flange portion provided with a predetermined concave hole.

  Opposite to the container body 10, the lid 20 includes a top surface portion 21 that covers food from above and a side wall 22 that descends downward from the periphery of the top surface portion 21, and the lower end of the side wall 22 engages with the container body 10. And a flange portion 25 that extends from the joint portion 23 in the horizontal direction. The joining portion 23 is formed in a cross-sectional fishing shape and is attached in a state of being fitted to the lid receiving portion 13 provided on the container body 10. Similar to the container body 10, the lid body 20 is also formed in a dish shape that is substantially rectangular in plan view.

Multiple recessed hole types :
A plurality of concave holes are formed on the surface of the flange portion 15 to roughen the surface. There are the following types of concave holes.
First, for example, as shown in FIG. 3 and FIG. 4, the concave portion 31 has an opening on one surface of the flange portion 15, and the bottom portion of the concave hole protrudes to the other surface beyond the thickness of the flange portion. . The concave hole 31 is formed by projecting a convex portion on the other surface by extending the flange portion by applying a mold having a convex mountain to one surface of the flange portion.
A plurality of such concave holes are formed vertically and horizontally on the surface of the sheet (flange portion), but they may be randomly arranged or regularly arranged. However, the plurality of concave holes 31 need to be distributed so that a straight line that cuts the sheet can divide at least some of the concave holes. This is because the processing edge is not formed on the end surface of the sheet unless the cut surface after cutting the sheet has an end surface obtained by dividing the concave hole.

As shown in FIG. 3, when the concave holes 31 are regularly arranged, the interval L1 between the concave hole rows adjacent in the direction away from the side wall 12 from the A row to the B row and the C row is smaller than the diameter of the concave holes. is necessary. For that purpose, the concave holes adjacent to each other in the direction away from the side wall (direction D1) are alternately arranged. In FIG. 3, the row A recessed holes 31 a and the row B recessed holes 31 b are formed obliquely with respect to the side wall 12 (the lid receiving portion 13).
The distance between the recessed holes adjacent to the direction along the side wall 12 (D2 direction) (the distance between the centers of the recessed holes) is smaller than 10 mm. This is because if the interval is wider than 10 mm, the length of the horizontal cutting portion 33 that does not cut the concave holes may exceed 10 mm, and the effect of preventing rubbing may not occur.

The size of the concave hole is preferably about 0.2 mm to 1 mm in terms of average diameter. This is because if it is smaller than 0.2 mm, it is difficult to project in a convex shape on the opposite surface to the surface on which the concave hole is formed. Moreover, it is because it may become a through-hole and it may worsen the appearance when it is larger than 1 mm.
On the other hand, even when the concave holes are randomly arranged, it is preferable to arrange the concave holes so that the interval between the concave holes (interval between the centers of the concave holes) is smaller than 10 mm. This is to prevent the length of the horizontal cutting portion from exceeding 10 mm. Since it can be made smaller than 10 mm, the concave holes can partially overlap each other.

When the flange portion 15 having such a recessed hole 31 is cut, the end face of the flange portion 15 is a mixed cut surface formed by a recessed cut portion 32 that cuts the recessed hole 31 and a horizontal cut portion 33 that does not cut the recessed hole. Composed. And the flange part 15 which has such a mixed cut surface is hard to rub a finger | toe, and is hard to raise | generate an abrasion.
In addition, although a recessed hole may be formed from the upper surface of a flange part 15, or a recessed hole may be formed from a lower surface, the direction formed from an upper surface is preferable at a point with a slightly good appearance.

  Second, the embossing 34 is formed on both the upper and lower surfaces of the flange portion 15 and does not affect the other surface (the lower surface in the case of the upper surface and the upper surface in the case of the lower surface). The embossing 34, which is an assembly of small concave holes, is obtained by pressing with a die having a textured surface. That is, the texture 34 is provided with minute irregularities on the surface of the flange portion 15 to form the surface in a sandy shape, and the depth of the irregularities is equal to or less than the thickness of the flange portion 15. The embossed surface is formed on both surfaces of the flange portion 15 so that the section of the flange portion 15 cut is made uneven as shown in the enlarged end view of FIG. However, the flange portion 15 itself has a flat plate shape, and the flange portion 15 does not have waviness in the vertical direction, and irregularities appear only on the surface of the flange portion 15.

  When the flange portion 15 having such a textured surface is cut, an end surface of the flange portion 15 cuts an upper concave cut portion 35 that cuts a concave hole (texture) on the upper surface of the flange portion and a lower portion that cuts a concave hole (texture) on the lower surface of the flange portion. It becomes a mixed cut surface formed by the concave cut portion 36 and the central cut portion 37 that cuts the central portion without the concave hole. And the flange part 15 which has such a mixed cut surface is hard to rub a finger | toe, and is hard to raise | generate an abrasion.

Mixed cutting plane position :
The mixed cut surface can be applied to the entire circumference of the flange portion 15. If applied to the entire circumference, the processing edge is applied to any position of the flange portion 15 so that it is difficult to cause injury.
Further, in the flange portion 15 formed in a frame shape in a plan view as shown in FIG. 1, a mixed cut surface can be provided around the corner, that is, around the corner excluding the corner. In other words, the flange portion 15a provided on the long side wall 12a extending from the long side 11a of the rectangular bottom portion 11 of the side wall 12 extends from the short side 11b to the portion excluding the central portion and similarly. The flange portion 15b provided on the short side wall 12b can be provided at a portion other than the central portion. When opening the lid of the container, that is, when releasing the engagement between the container body 10 and the lid 20, try to open from the corner part of the rectangular shape or at least the edge part avoiding the central part. It is because it is thought that there are many.

  Moreover, the mixing cut surface can be provided in the flange part 15 at intervals of 5 mm at the longest. This is because even if the end face that does not become the mixed cut portion is about 5 mm at the longest, the hand is hardly rubbed.

Examples of the material of the food packaging container 1 include polystyrene resins such as polystyrene and polystyrene-based copolymers, polyolefin resins such as polyethylene, polypropylene, and olefin-based copolymers, and polyethylene terephthalate. Examples thereof include polyester resins and other various thermoforming synthetic resins.
Such a sheet material may have a single-layer structure, a laminated structure, or a foamed sheet. Moreover, it is a preferable aspect that the food packaging container 1 is formed of a transparent and non-fogging material so that the food can be easily seen.

  In order to manufacture such a food packaging container 1, it can be formed from a synthetic resin sheet material by using hot plate forming means such as vacuum forming or pressure forming. At this time, a die having a predetermined unevenness is used for a portion corresponding to 15 in the flange portion. In order to provide the concave hole 31, a mold having a convex ridge formed at a portion corresponding to the surface having the opening of the concave hole 31 and a mold having a concave hole formed at a portion corresponding to the opposite surface are used. . In addition, in order to provide the texture 34, a die having a texture applied to a portion corresponding to the flange portion is used. Then, if the flange part 15 is parted with a punching die, the food packaging container 1 in which a cut surface for cutting the concave hole 31 or the texture 34 is formed on the end face is obtained.

The above-described embodiment and its modifications are examples and are not limited to such forms, but include any modified form that does not contradict the spirit of the present invention. That is, the scope of the present invention includes cases where some of the configurations shown in the above embodiment are not included, other known configurations are included, or alternative configurations are employed.
For example, in the above description, the mixed cut surface formed on the flange portion 15 of the container body 10 has been described, but the same mixed cut surface can also be provided for the flange portion 25 of the lid 20. Further, the shape of the food packaging container 1 is not limited to the shape shown in FIG. 1, and various shapes applied to the surface thereof can be changed. Furthermore, the shape of the recessed hole 31 is not limited to a semicircular shape.

DESCRIPTION OF SYMBOLS 1 Food packaging container 2 Hinge part 10 Container main body 11 Bottom part 12 Side wall 13 Cover body receiving part 15 Flange part 20 Cover body 21 Top surface part 22 Side wall 23 Engagement part 25 Flange part 31 Concave hole 32 Concave cutting part 33 Horizontal cutting part 34 Wrinkles (concave hole)
35 Upper concave cutting part 36 Lower concave cutting part 37 Central cutting part

Claims (6)

  In a food packaging container for containing food, a plurality of concave holes are formed on one surface of a flange portion extending outward from a side wall to roughen both surfaces of the flange portion, and the end surface of the flange portion is A food packaging container configured as a mixed cut surface formed by a concave cut portion that cuts a concave hole and a horizontal cut portion that does not cut the concave hole.   The food packaging container according to claim 1, wherein the maximum length of the horizontal cut portion is 5 mm or less.   The food packaging container according to claim 1 or 2, wherein another concave hole that is adjacent to the one concave hole in the direction away from the side wall is formed obliquely with respect to the side wall.   In a food packaging container for containing food, a plurality of concave holes are formed vertically and horizontally on both the upper and lower surfaces of the flange portion extending outward from the side wall to roughen both surfaces of the flange portion. The end surface of the flange portion is formed by an upper concave cutting portion that cuts the concave hole on the upper surface of the flange portion, a lower concave cutting portion that cuts the concave hole on the lower surface of the flange portion, and a central cutting portion that cuts the central portion without the concave hole. A food packaging container configured as a mixed cut surface.   The food packaging container according to any one of claims 1 to 4, wherein a part of the end face of the flange portion is formed as a mixed cut surface.   The food packaging container according to claim 5, which has a mixed cut surface around a corner of the frame-like flange portion in plan view.

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