JP7202086B2 - packaging container - Google Patents

Description

Patent Act Article 30, Paragraph 2 applies (1) Exhibition name: Spring Fair 2018 Date: February 14, 2018 (2) Publication name: TOTAL FOOD PACKAGE GUIDE CHUO GUIDE 2018 Chuo Kagaku plastic food packaging container General catalog Date of issue: April 4, 2018 (3) Internet: Homepage Posting date: April 4, 2018

TECHNICAL FIELD The present invention relates to a packaging container made of synthetic resin, for example, and sealed by fitting a lid from the outside of the container body.

Conventionally, food packaging containers sold in supermarkets and convenience stores have a lid body fitted inside the container body in consideration of the type and capacity of food, how to eat and drink, quality maintenance, appearance, etc. So-called inner-fitting packaging containers and so-called outer-fitting packaging containers in which a lid is fitted to the outside of a container body have been adopted. In particular, the outer fitting type is superior to the inner fitting type in that it can accommodate a larger amount of food, but is inferior in that it lacks sealing performance. Therefore, in the packaging container, the outer fitting type (hereinafter referred to as " (also referred to as "wall outside fitting type") has been utilized.

For example, in Patent Literature 1, the outer wall 15 of the container body 2 has a concave outer wall 11 composed of a lower outer wall 11A, an upper outer wall 11B, and a wall-shaped stepped portion 11C. is formed, and a structure is disclosed in which the fitting wall portion 22 of the lid body 5 is externally fitted to the outer peripheral wall 11 . When the lid body 5 is mounted, the fitting wall portion 22 is deformed so as to spread outward to exceed the upper half side outer peripheral wall portion 11B, and then returns to its original shape to be externally fitted to the wall-shaped step portion 11C. , to obtain hermeticity. Furthermore, the planar auxiliary wall 8 provided between the upper end portion of the inner wall 14 of the container body 2 and the upper end portion of the outer wall 15 is a fitting recess 28 provided in the intermediate peripheral wall portion 27 of the lid 5 . By contacting with the stepped portion 28a, the shape retention strength is enhanced.

Japanese Patent No. 3288604

However, improving the sealability and shape-retaining strength may lead to the deterioration of the unsealability. As in Patent Document 1, when the lid body is externally fitted around the entire circumference of the container body, not only is the rigidity around the fitting part increased, but the container body and the lid body are not only tightly fitted at places other than the fitting part. If the lids are in close contact with each other, it is difficult for the lid to deform as a whole.

In addition, regardless of the size of the food, the height of the side wall of the container body, or the presence or absence of unevenness in the height direction, the visibility of the contents is an essential factor for the consumer of the product to make a purchase decision. On the other hand, as described above, if there is a portion where the container body and the lid are in close contact with each other other than the fitting portion, it may be difficult to open the package. Therefore, as a packaging container, the shape of the portion adjacent to the lid other than the fitting portion should be considered so as to achieve both visibility of the contents and ease of opening the lid.

In some cases, it is preferable to form the packaging container in a rectangular shape in a plan view in order to improve the sealability and the unsealability. On the other hand, a packaging container that is rectangular in plan view has a larger projected area than a circular packaging container that has the same vertical and horizontal dimensions. It is difficult to produce a sense of volume in a certain content. Therefore, at least the shape of the sidewall portion adjacent to the contents should be considered.

In addition, compared to circular packaging containers, rectangular packaging containers in a plan view allow the straight flanges to be placed next to each other, making effective use of space for packaging during distribution and display at the time of sale. can do. On the other hand, in consideration of design, there are cases in which a round flange is preferred so that the packaging container bulges outward when viewed from above, but the degree of deformation is conspicuous compared to a straight flange. Cheap. Therefore, consideration should be given to the shape of the flange portion that reduces the degree of deformation.

Therefore, in adopting the fitting type outside the wall portion, the first object of the present invention is to provide a packaging container that is airtight, easy to open and easy to see the contents, and the second object of the present invention is to: It is a third object of the present invention to provide a packaging container that contributes to an improvement in the sense of volume felt by the purchaser of the product, and to provide a packaging container that reduces the degree of deformation that tends to occur during distribution and sales. to provide.

That is, a packaging container according to the present invention is a packaging container comprising a container body and a lid body for sealing the container body, wherein the container body includes a bottom portion on which contents such as food are placed. a side wall portion continuously provided upward from the entire periphery of the outer edge of the bottom portion; and a flange portion continuously provided outwardly from the entire periphery of the upper edge of the side wall portion; is a flange inclined surface portion which is inclined upward from the upper edge of the side wall portion and is provided at a uniform height in the circumferential direction; and a flange wall which is provided downwardly from the outer edge of the flange inclined surface portion. and the flange wall portion is recessed inward and has a flange wall recess portion that fits with the lid body.

It is desirable that the flange wall portion has flange wall corner portions at four corners, and the flange wall recessed portions are provided at the flange wall corner portions.

The flange portion further has a flange tip portion continuously provided downward from the outer edge of the flange extension portion, and the central portion of the outer edge of the flange extension portion and the flange tip portion The central portion of the lower edge is linear in plan view, the outer edge of the flange extension is arch-shaped in front view, and the angle formed by the flange extension and the flange tip is It is desirable that the distance is smaller closer to the central portion of the outer edge of the flange extension.

The packaging container according to the present invention not only achieves both airtightness suitable for fitting outside the wall and easy-openability due to the flange inclined surface portion, but also realizes easy-to-see contents, contributing to the decision-making of the purchaser of the product. can do. The combination of sealability and easy-to-open properties eliminates the need for tamper-evident tape and the task of attaching it, thereby reducing costs and improving workability, as well as improving ease of use for product purchasers. improvement is realized.

It is a perspective view of a packaging container in one embodiment of the present invention. 1 is a perspective view of a container body in one embodiment of the present invention; FIG. 1C is an enlarged BB end view at the AA portion shown in FIG. 1B; FIG. 1 is a plan view of a container body in one embodiment of the present invention; FIG. It is a front view of a container body in one embodiment of the present invention.

1A to 4, a packaging container 10 comprising a container body 20 and a lid M that seals the container body 20 (hereinafter, also referred to as "this packaging container 10") according to an embodiment of the present invention. ) will be explained.
Incidentally, in these figures, for the same parts existing in a plurality, only one part is numbered, and overlapping parts may be omitted. For convenience of explanation, predetermined parts and their lead lines are indicated by dashed lines or imaginary lines (double-dot chain lines).

As shown in FIG. 1A, the packaging container 10 includes a container body 20 and a lid M that seals the container body 20 . The packaging container 10 employs a wall portion external fitting type, which will be described later.

Here, for convenience of explanation, first, the lid M of the packaging container 10 will be explained with reference to FIG. 1A.
As shown in FIG. 1A, the lid M that seals the container body 10 has the same shape as the container body 20 in a plan view, and has a dome-shaped lid ceiling portion and a lower end edge of the lid ceiling portion. and a lid body flange portion continuously provided in the outward direction. The lid flange portion has a lid flange flat portion that extends outward and substantially horizontally, and a lid flange wall portion that extends downward from the outer edge of the lid flange flat portion. The flat portion of the lid flange is close to the upper end portion of the flange portion 3 when the lid M is attached to the container body 20 . The lid flange wall portion has a lid flange wall recess that is recessed with respect to the outside and fits with the flange portion 3 of the container body 20 .

Next, the container body 20 of the packaging container 10 will be described with reference to FIGS. 1A and 1B. As shown in FIGS. 1A and 1B, the container body 20 has a substantially rectangular shape in a plan view, and is provided continuously upward from the bottom portion 1 in which food and the like are accommodated and the entire outer edge of the bottom portion 1. It has a side wall portion 2 and a flange portion 3 continuously provided outward from the entire periphery of the upper edge of the side wall portion 2 .

As shown in FIG. 1B, the bottom portion 1 of the container body 20 is formed in a substantially rectangular shape in plan view so as to have corner portions at four corners. The bottom portion 1 has dogleg-shaped legs formed to include the corner portions, and a placement portion formed continuously so as to be raised by the legs. The mounting portion has a stepped portion having four steps from the inner edge of the leg portion, a flat portion that spreads flatly from the uppermost step of the stepped portion, and a partition portion that partitions the flat portion.

As shown in FIG. 1B, the side wall portion 2 of the container body 20 is continuously provided upward from the entire periphery of the outer edge of the bottom portion 1, and has a substantially rectangular shape in plan view so as to have side wall corner portions 2a at the four corners. formed. In other words, the side wall portion 2 extends upward from the outer edge of the leg portion of the bottom portion 1 and the outer edge of the mounting portion, and the side wall corner portion 2a is continuous with the outer edge of the leg portion. there is The side wall portion 2 includes a lower side wall portion on the side of the bottom portion 1, a side wall flat portion horizontally extending from the entire circumference of the upper edge of the lower side wall portion, and an upper side wall portion extending upward from the entire circumference of the outer edge of the flat side wall portion. and an upper side wall portion that rises substantially vertically.

As shown in FIG. 1B, the flange portion 3 of the container main body 20 has flange corner portions 3a at four corners, and a flat surface is provided so as to have gently swollen curved flange side portions 3b between each of the flange corner portions 3a. It is formed in a substantially rectangular shape when viewed. The flange portion 3 is provided continuously outward from the entire circumference of the upper edge of the side wall portion 2, and is a planar shape provided so as to be inclined upward from the upper edge of the side wall portion 2 and have a uniform height in the circumferential direction. a flange inclined surface portion 31, a flange wall portion 32 provided so as to substantially hang down from the outer edge of the flange inclined surface portion 31, and a flange wall portion 32 extending in the lateral direction from the lower edge of the flange wall portion 32 It has a flange extending portion 33 provided and a flange tip portion 34 provided continuously downward from the outer edge of the flange extending portion 33 .
According to this configuration, since the flange inclined surface portion 31 is provided at a uniform height in the circumferential direction, when the lid M is attached to the container body 10, the lid body flange flat portion extends over the entire circumference of the flange inclined surface portion 31. The close proximity makes it difficult for the lid to come off. That is, even if an external force to bend the lid M is suddenly applied to the container body 20 , the lid body flange flat portion hits the entire circumference of the flange inclined surface portion 31 to prevent deformation, so that the lid body comes off the container body 20 . becomes difficult.
The height dimension from the lowest part of the container body 20 to the apex portion of the flange portion 3 and the width dimension of each portion of the flange portion 3 may be any, and are not limited.

As shown in FIG. 2, the vertical height difference D between the inner peripheral edge and the outer peripheral edge corresponding to the vertex of the flange inclined surface portion 31 of the container body 20 is preferably 0.3 to 3 mm. is 0.5 to 2 mm. If the height difference D is less than 0.3 mm, the gap between the lid flange plane portion and the flange inclined surface portion 31 is filled when the lid is closed, resulting in surface contact. Also, when viewing the inside from the outside and lateral direction of the container body 20, the inner peripheral edge narrows the field of vision. It may be difficult to see from the outside. On the other hand, if the height difference D is larger than 3 mm, the outer peripheral edge side of the flange inclined surface portion 31 is sharpened, so that the strength of the flange portion 3 may decrease.
According to this configuration, the strength of the flange portion 3 suitable for attaching and unsealing the lid makes it easy to remove the lid by deforming it with an external force when the lid is unsealed, and the inside can be visually observed from the lateral direction. You can extend the range.
In addition, the vertical cross-sectional shape from the direction orthogonal to the peripheral edge of the flange inclined surface portion 31 may be bulging or constricted.

As shown in FIGS. 1B and 2, the flange wall portion 32 has four curved flange wall corner portions 32b at the four corners, which are arranged inwardly to mate with a lid that closes the opening formed by the flange inclined surface portion 31. As shown in FIGS. It has a flange wall recess 32a recessed into the flange wall recess 32a, which is located at a flange wall corner 32b. Here, the wall external fitting type means that the flange wall recess 32a of the container body 20 and the cover flange wall recess are fitted from the outside and lateral direction.
According to this configuration, since the flange wall recesses 32a are provided only at the four flange wall corners 32b, the container main body 20 is sealed with the lid M, and therefore, when the container body 20 is sealed with the lid M, it is possible to prevent an external force from being unexpectedly applied during distribution or the like. Not only is it difficult for the lid to come off, but it also becomes easier for the lid to come off when an external force is intentionally applied when opening the package. Further, since only the four flange wall recesses 32a are recessed with respect to the flange wall portion 32, the molded container body 20 is easily separated from the mold during molding. In other words, as compared with the case where the flange wall recess 32a is provided on the entire periphery of the flange wall 32, it is superior in sealing performance, easy opening performance, and releasability from the mold.
The flange wall recessed portion 32a is formed in a belt shape along the flange wall corner portion 32b from both sides of the flange wall corner vertex portion having a predetermined width located at the vertex of the flange wall corner portion 32b. The shape of the end surface of the flange wall recessed portion 32a and the depth with respect to the flange wall portion 32 may be any.

As shown in FIG. 3, the curvature radius R1 of the upper edge of the side wall portion 2 corresponding to the side wall corner portion 2a is larger than the curvature radius R2 of the outer edge of the flange inclined surface portion 31 corresponding to the flange corner portion 3a. is larger than the radius of curvature R3 of the outer edge of the flange extending portion 33 corresponding to the flange corner portion 3a.
According to this configuration, the projected area of the container body 20 can be increased by minimizing the curvature radius R3, and the volume of the container body 20 can be decreased by maximizing the curvature radius R1. The sense of volume can be improved relative to the size of the packaging container. That is, the larger the radius of curvature R1, the easier it is for the gap between the side wall corner 2a and the food to be filled.
The dimensions and ratios of the curvature radii R1, R2, and R3 are not limited.

As shown in FIGS. 3 and 4, the central portion of the outer edge of the flange extending portion 33 and the central portion of the lower edge of the flange tip portion 34 are formed to be linear in plan view, and the flange extending portion The outer edge of the projecting portion 33 is formed to have an arch shape when viewed from the front, and the angle formed by the flange extending portion 33 and the flange tip portion 34 is the center of the outer edge of the flange extending portion 33. The closer to the part, the smaller. In other words, the flange tip portion 34 is steeper at the central portion than at both end portions.
According to this configuration, even if an external force that crushes the central portion of the flange side portion 3b is applied from the lateral direction due to packing during distribution, etc., the object to which the external force is applied is the central portion of the outer edge of the flange extending portion 33 and the external force. Not only is the central portion of the lower edge of the flange tip portion 34 in line contact, but also the central portion of the flange tip portion 34 is in surface contact. Damage to the flange portion 3 can be avoided. Furthermore, since the boundary portion between the flange extension portion 33 and the flange tip portion 34 is formed in an arch shape, the rigidity and strength of the flange extension portion 33 can be increased.
The central portion of the outer edge of the flange extending portion 33 and the central portion of the lower edge of the flange tip portion 34 have the same length and occupy about one third of the flange side portion 3b. A central portion of the flange tip 34 is generally vertical.

Note that the container body 20 and the lid M may be formed by thermoforming a synthetic resin sheet by sheet forming such as vacuum forming, hot plate pressure forming, vacuum pressure forming, and double-sided vacuum forming. As the synthetic resin sheet, for example, a single-layer or multi-layer sheet made of a polyester resin such as polyethylene terephthalate, a styrene resin such as polystyrene, or an olefin resin such as polypropylene may be used. As the resin, it is preferable to use, for example, a foamed resin because of its light weight and heat insulating properties. Furthermore, the front or back surface of the sheet may be covered with a synthetic resin film, and when the front surface is covered, printing may be applied. The thickness of the synthetic resin sheet is not particularly limited.
Further, the container main body 20 and the lid M may be made of paper.

REFERENCE SIGNS LIST 10 packaging container 20 container body M lid 1 bottom 2 side wall 2a side wall corner 3 flange 3a flange corner 31 flange inclined surface 32 flange wall 32a flange wall recess 32b flange wall corner 33 flange extension 34 flange tip

Claims (2)

A packaging container comprising a container body and a lid that seals the container body,
The container body includes a bottom on which the contents are placed, a side wall continuously extending upward from the entire periphery of the outer edge of the bottom, and continuous outward from the periphery of the upper edge of the sidewall. and a flange portion provided as a
The flange portion includes a flange inclined surface portion that is inclined upward from the upper edge of the side wall portion and is provided at a uniform height in the circumferential direction, and a flange inclined surface portion that is provided downwardly from the outer edge of the flange inclined surface portion. and a flange wall,
The flange wall portion is recessed inward and has a flange wall recess portion that fits with the lid body,
The flange portion
a flange extension provided to extend outward from the lower edge of the flange wall;
and a flange tip provided continuously downward from the outer edge of the flange extension,
a center portion of the outer edge of the flange extending portion and a center portion of the lower edge of the flange tip portion are linear in plan view;
an outer edge of the flange extending portion is arch-shaped in a front view,
The closer the angle between the flange extension and the flange tip is to the central portion of the outer edge of the flange extension, the smaller it is.
A packaging container characterized by: The flange wall portion has flange wall corner portions at four corners,
The packaging container according to claim 1, wherein the flange wall recess is provided at the flange wall corner.

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