Packing container

Abstract

To easily increase the strength of a packaging container.SOLUTION: A packaging container includes a first flange portion provided in a first direction and corresponding to a long side, a second flange portion provided in a second direction intersecting the first direction and corresponding to a short side, and at least one rib 140 provided from a side portion 120 to a bottom portion 130 along the second direction, the rib including a rib flat portion and at least one protrusion portion extending in the second direction. In the packaging container, the at least one rib includes a first protrusion portion provided on a first side of the bottom portion close to the second flange portion and a second protrusion portion provided on a second side opposite to the first side of the bottom portion, and the first protrusion portion and the second protrusion portion may protrude upward from the bottom portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging container. [Background technology]

[0002] In recent years, it has become common to purchase favorite processed foods in packaging containers at stores such as supermarkets and convenience stores and eat them. In stores, foods are displayed in a manner that allows the contents to be seen. Specifically, foods are packaged in a transparent lid and packaging container, or in a plastic packaging container and a transparent film provided on the top surface of the packaging container. Patent Document 1 discloses an example of a packaging container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-284095 A Summary of the Invention [Problem to be solved by the invention]

[0004] When wrapping (covering) a plastic packaging container with a transparent film, a certain amount of force is applied to the packaging container. Depending on the shape of the packaging container, the strength of the packaging container may not be sufficient and the packaging container may become deformed. This may cause the film to wrinkle, resulting in a poor appearance.

[0005] Therefore, the present invention is intended to solve the above problems, and one of its objects is to easily increase the strength of a packaging container. [Means for solving the problem]

[0006] According to one embodiment of the present invention, a packaging container is provided, comprising a first flange portion provided in a first direction and corresponding to a long side, a second flange portion provided in a second direction intersecting the first direction and corresponding to a short side, and at least one rib provided along the second direction from a side portion to a bottom portion, wherein the rib has a rib flat portion and at least one protrusion portion extending in the second direction.

[0007] In the above packaging container, the at least one rib has a first protrusion portion provided on a first side of the bottom portion close to the second flange portion, and a second protrusion portion provided on a second side opposite the first side of the bottom portion, and the first protrusion portion and the second protrusion portion may protrude upward from the bottom portion.

[0008] In the above packaging container, the at least one rib includes a first rib arranged near the second flange portion of the bottom portion and a second rib adjacent to the first rib, the first rib has a 1-1 protrusion portion provided on a first side of the bottom portion close to the one second flange portion and a 1-2 protrusion portion provided on a second side opposite the first side of the bottom portion, the second rib has a 2-1 protrusion portion provided on the first side of the bottom portion and a 2-2 protrusion portion provided on the second side of the bottom portion, and the 1-1 protrusion portion, the 1-2 protrusion portion, the 2-1 protrusion portion, and the 2-2 protrusion portion may protrude upward from the bottom portion.

[0009] In the packaging container, the 1-2 protrusion may be higher than the 1-1 protrusion, and the 2-1 protrusion may be higher than the 1-2 protrusion.

[0010] In the above packaging container, the first flange portion may be formed in an arc shape so that a central portion of the first flange portion is positioned outside a first virtual line connecting a first portion of the first flange portion and a second portion opposite the first portion.

[0011] In the above packaging container, the second flange portion may be formed in an arc shape so that a central portion of the second flange portion is positioned outside a second virtual line connecting a third portion of the second flange portion and a fourth portion opposite the third portion.

[0012] In the packaging container, in a cross-sectional view, the first flange portion and the second flange portion may have a curved portion and a flat portion provided on the outer side of the curved portion.

[0013] In the above packaging container, the packaging container may contain a non-foamable resin material. Effect of the Invention

[0014] By using one embodiment of the present invention, the strength of the packaging container can be easily increased. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic perspective view of a packaging container according to a first embodiment of the present invention. [Diagram 2] 1 is a schematic plan view of a packaging container according to a first embodiment of the present invention. [Diagram 3] 1 is a schematic cross-sectional view of a packaging container according to a first embodiment of the present invention taken along line A1-A2. [Figure 4] 1 is a schematic cross-sectional view of a packaging container according to a first embodiment of the present invention taken along line B1-B2. [Diagram 5] 1 is a partially enlarged schematic cross-sectional view of a packaging container according to a first embodiment of the present invention taken along line B1-B2. [Figure 6] FIG. 2 is a further simplified schematic plan view of the packaging container according to the first embodiment of the present invention. [Figure 7] FIG. 4 is a schematic perspective view of a packaging container according to a second embodiment of the present invention. [Figure 8] FIG. 4 is a further simplified schematic plan view of a packaging container according to a second embodiment of the present invention. [Figure 9]11 is a photograph of a packaging container according to a second embodiment of the present invention taken from the flat side. [Figure 10] 11 is a photograph of a packaging container according to a second embodiment of the present invention taken from the bottom side. [Figure 11] This is a photograph of a packaging container provided with only ribs, taken from the flat side. [Figure 12] This is a photograph taken from the bottom side of a packaging container provided with only ribs. [Figure 13] 1 is a photograph of a packaging container according to a first embodiment of the present invention, wrapped in film and taken from the flat side. [Figure 14] 1 is an enlarged photograph of a packaging container according to a first embodiment of the present invention, wrapped in film and taken from the flat side. [Figure 15] 13 is a photograph of a packaging container according to a second embodiment of the present invention, wrapped in film and taken from the flat side. [Figure 16] 11 is an enlarged photograph of a packaging container according to a second embodiment of the present invention, wrapped in film and taken from the flat side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, each embodiment of the invention disclosed in this application will be described with reference to the drawings. However, the present invention can be embodied in various forms without departing from the gist of the invention, and the present invention should not be interpreted as being limited to the description of the embodiments exemplified below.

[0017] In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same or similar reference numerals (reference numerals simply suffixed with -1, -2, etc.) and their repeated explanation may be omitted. Also, the dimensional ratios in the drawings may differ from the actual ratios for the convenience of explanation, and some components may be omitted from the drawings.

[0018] Furthermore, in the detailed description of the present invention, when defining the positional relationship between a certain component and another component, "above" and "below" do not only mean a component being located directly above or below another component, but also include a component being located between the other components, unless otherwise specified.

[0019] First Embodiment In this embodiment, a packaging container 100 will be described with reference to the drawings.

[0020] (1. Configuration of the packaging container 100) Fig. 1 is a schematic perspective view of a packaging container 100 according to this embodiment. Fig. 2 is a schematic plan view of the packaging container 100. Fig. 3 is a schematic cross-sectional view between A1-A2 of the packaging container 100. Fig. 4 is a schematic cross-sectional view between B1-B2 of the packaging container 100. Fig. 5 is an enlarged view of a portion (between C1-C2) of the schematic cross-sectional view between B1-B2 of the packaging container 100.

[0021] As shown in FIGS. 1 to 4, the packaging container 100 includes a flange portion 110, a side portion 120, and a bottom portion .

[0022] As shown in FIG. 2, in a plan view, the packaging container 100 has a shape close to a rectangle (rectangle) with rounded corners. The packaging container 100 is molded using a resin material that does not have foaming properties. In this example, the packaging container 100 is molded using a material that is a mixture of polypropylene, talc, and biomass material. By using the above-mentioned mixed material, physical impact can be mitigated. In addition, by using the above-mentioned material, shrinkage and deformation of the packaging container can be suppressed even when heat treatment is performed in a microwave oven. Therefore, a user can easily warm food by heating the packaging container directly in a microwave oven. Note that the present embodiment is not limited to the above materials. Other resin materials may be used, for example, olefin-based resins such as polyethylene and polypropylene, polystyrene paper (PSP) made of polystyrene-based resins, high impact polystyrene (HIPS) in which impact resistance is improved by blending an elastic material such as butadiene copolymer with GP polystyrene, and polyester-based resins such as polyethylene terephthalate.

[0023] The flange portion 110 is provided on the upper periphery of the packaging container 100. The flange portion 110 includes a first flange portion 111, a second flange portion 113, and a corner flange portion 115. The first flange portion 111, the second flange portion 113, and the corner flange portion 115 are provided in a continuous manner. The first flange portion 111 is provided in a first direction D1. The first flange portion 111 corresponds to the long side. The second flange portion 113 is provided in a second direction D2 that intersects with the first direction D1 (orthogonal in this example). The second flange portion 113 corresponds to the short side. The first flange portion 111, the second flange portion 113, and the corner flange portion 115 have the same cross-sectional structure, and therefore will be described below as the flange portion 110.

[0024] The side surface portion 120 includes a first side surface portion 121, a second side surface portion 123, and a corner side surface portion 125. The first side surface portion 121, the second side surface portion 123, and the corner side surface portion 125 are provided in a continuous manner. The first side surface portion 121 is provided in a continuous manner with the first flange portion 111. The second side surface portion 123 is provided in a continuous manner with the second flange portion 113. The corner side surface portion 125 is provided in a continuous manner with the corner flange portion 115. The first side surface portion 121, the second side surface portion 123, and the corner side surface portion 125 have the same cross-sectional shape, and therefore will be described as the side surface portion 120. The side surface portion 120 is provided at an angle in a cross-sectional view.

[0025] The packaging container 100 has a rib 140 extending from the side portion 120 (more specifically, the first side portion 121) to the bottom portion 130 along the second direction D2. In this example, the packaging container 100 is provided with three ribs. Specifically, a rib 140-1 (also referred to as the "first rib") close to the short side (the second flange portion 113), a rib 140-2 (also referred to as the "second rib") adjacent to the rib 140-1 and provided in the center, and a rib 140-3 provided on the opposite short side are provided. The rib 140 has a convex shape on the upper side. The rib 140 functions to improve the strength against the force applied from the outside of the first flange portion 111 when the packaging container 100 is covered with a film.

[0026] 4, the rib 140 includes a protrusion 150 as well as a rib flat portion 145. The protrusion 150 extends along the second direction D2 on the bottom surface portion 130 and protrudes upward. In this example, the protrusions 150 are provided on both sides of one rib 140. In this embodiment, by having two convex shapes, the rib 140 which is a large convex and the protrusion 150 which is a smaller convex than the rib, it is possible to improve the strength against a force applied from the outside of the first flange portion 111 (also referred to as an "external force").

[0027] In the present embodiment, the protrusion 150 can be visually recognized as an underline in a plan view. Therefore, when characters are engraved on the bottom surface portion 130 of the packaging container 100, the engraved characters are visually recognized as being highlighted.

[0028] As shown in FIG. 5, in this embodiment, the rib 140-1 (first rib) has a 1-1 protrusion 150-1-1 and a 1-2 protrusion 150-1-2. The 1-1 protrusion 150-1-1 is provided on the side closer to the second flange portion 113. The 1-2 protrusion 150-1-2 is provided on the opposite side to the 1-1 protrusion 150-1-1. The rib 140-2 (second rib) includes a 2-1 protrusion 150-2-1 and a 2-2 protrusion 150-2-2. The 2-1 protrusion 150-2-1 is provided on the side closer to the rib 140-1. The 2-2 protrusion 150-2-2 is provided on the opposite side to the 2-1 protrusion 150-2-1.

[0029] As shown in FIG. 5, in this embodiment, the height of the 1-2 protrusion 150-1-2 (the vertical distance between the rib flat portion 145 and the top of the 1-2 protrusion 150-1-2) is greater than the height of the 1-1 protrusion 150-1-1 (the vertical distance between the rib flat portion 145 and the top of the 1-1 protrusion 150-1-1). The height of the 2-1 protrusion 150-2-1 (the vertical distance between the rib flat portion 145 and the top of the 2-1 protrusion 150-2-1) is greater than the height of the 1-2 protrusion 150-1-2. In this way, the height of the protrusion 150 may be smaller in the portion near the end of the packaging container 100 depending on the shape of the bottom surface portion 130 from the viewpoint of aesthetics. However, the closer to the end of the bottom surface portion 130 (the second side surface portion 123 connected to the second flange portion 113), the closer to the corner side surface portion 125 with high strength. As a result, even if the height of the protrusion 150 is reduced, the strength of the packaging container 100 can be maintained when the packaging container 100 is covered with a film. In addition, in the case of the rib 140-2 disposed in the center, although it is away from the corner side portion 125 having high strength, the strength of the packaging container 100 can be maintained by increasing the height of the protrusion 150. Note that the height of the 2-2 protrusion 150-2-2 (the vertical distance between the rib flat portion 145 and the top of the 2-2 protrusion 150-2-2) may be the same as the height of the 2-1 protrusion 150-2-1.

[0030] Returning to FIG. 3 and FIG. 4, the flange portion 110 includes an inner flange portion 110a and an outer flange portion 110b. The inner flange portion 110a and the outer flange portion 110b are provided in a continuous manner. As shown in FIG. 3, the inner flange portion 110a can have a curved surface in a cross-sectional view. Therefore, the inner flange portion 110a can also be called a curved portion. The outer flange portion 110b is provided flat. Therefore, the outer flange portion 110b can also be called a flat portion. In this embodiment, the flange portion 110 includes the inner flange portion 110a and the outer flange portion 110b, and therefore, when the packaging container 100 is covered with a film, the film and the flange portion 110 are in point contact (or line contact), making it easier to apply tension to the film.

[0031] FIG. 6 is a further simplified schematic plan view of the packaging container 100. As shown in FIG. 6, in this embodiment, the first flange portion 111 is provided in an arc shape (curved) in a plan view. More specifically, the first flange portion 111 is disposed such that the center portion 111CP of the first flange portion 111 is located outside the first virtual line VL1 connecting the first portion 111P1 of the first flange portion 111 and the second portion 111P2 on the opposite side of the first portion 111P1. The distance between the first virtual line VL1 and the center portion 111CP is about 2 mm. This generates a repulsive force when a force (external force) is applied to the packaging container 100 from the outside of the first flange portion 111. This can improve the strength of the packaging container 100. Therefore, even if a strong force is applied from the outside of the first flange portion 111 when covering (wrapping) the packaging container with a film elongated in the second direction, the shape of the packaging container 100 can be maintained, thereby preventing the film from wrinkling.

[0032] In other words, by using this embodiment, the strength of the packaging container can be easily increased, and the occurrence of wrinkles in the film covering the packaging container can be suppressed.

[0033] <Second embodiment> In this embodiment, a packaging container different from that in the first embodiment will be described. Specifically, a packaging container having a second flange portion with a different shape will be described.

[0034] (2. Configuration of packaging container 100A) Fig. 7 is a schematic perspective view of a packaging container 100A according to this embodiment. As shown in Fig. 7, the packaging container 100A includes a flange portion 110A, a side portion 120, and a bottom portion 130. The flange portion 110A includes a first flange portion 111, a second flange portion 113A, and a corner flange portion 115.

[0035] In this embodiment, in addition to the first flange portion 111, the second flange portion 113A is provided in an arc shape (curved) in a plan view. FIG. 8 is a further simplified schematic plan view of the packaging container 100A. As shown in FIG. 8, more specifically, the second flange portion 113A is disposed outside the second virtual line VL2 that connects the third portion 113P1 of the second flange portion 113A and the fourth portion 113P2 on the opposite side of the third portion 113P1. In this example, the distance between the second virtual line VL2 and the central portion 113CP is about 1.1 mm. This not only generates a repulsive force when a force (external force) is applied to the packaging container 100 from the outside of the first flange portion 111, but also improves the strength of the packaging container 100 against a force applied from the outside of the second flange portion 113A. Therefore, even if a strong force is applied from the outside of first flange portion 111 and second flange portion 113A when wrapping the film around the packaging container, the shape can be maintained, and the formation of not only large wrinkles but also small wrinkles in the film can be suppressed.

[0036] In other words, by using this embodiment, it is possible to easily increase the strength of the packaging container and further prevent wrinkles from occurring in the film covering the packaging container. EXAMPLES

[0037] A packaging container manufactured according to one embodiment of the present invention will be described below.

[0038] FIG. 9 is a photograph of a packaging container using the second embodiment of the present invention taken from the top side. FIG. 10 is a photograph of a packaging container using the second embodiment of the present invention taken from the bottom side. FIG. 11 is a photograph of a packaging container provided with only ribs taken from the top side. FIG. 12 is a photograph of a packaging container provided with only ribs taken from the bottom side. Letters are formed on the flat portion 145 of the rib 140 in FIGS. 9 to 12. As shown in FIGS. 9 and 10, it was confirmed that by providing a protrusion 150 on the rib 140, the formed (printed) letters are displayed more emphasized than when only the rib is provided as shown in FIGS. 11 and 12.

[0039] Fig. 13 is a photograph of a packaging container using the first embodiment of the present invention covered with film (with the overlapping portion of the film pressed against the bottom side) taken from the flat side. Fig. 14 is an enlarged photograph of a corner of a packaging container using the first embodiment of the present invention covered with film taken from the flat side. Fig. 15 is a photograph of a packaging container using the second embodiment of the present invention covered with film taken from the flat side. Fig. 16 is an enlarged photograph of a corner of a packaging container using the second embodiment of the present invention covered with film taken from the flat side. As shown in Figs. 13 and 15, by using one embodiment of the present invention, no large wrinkles were found in the film.

[0040] As shown in Fig. 14, small wrinkles were observed near the corner flanges in the case of the packaging container of the first embodiment. However, as shown in Fig. 16, the occurrence of small wrinkles near the corner flanges in the case of the packaging container of the second embodiment was also suppressed.

[0041] (Modification) Within the scope of the concept of the present invention, a person skilled in the art may conceive of various modifications and alterations, and it is understood that such modifications and alterations also fall within the scope of the present invention. For example, those in which a person skilled in the art appropriately adds or deletes components, combines or modifies the designs of the above-mentioned embodiments, or adds, omits, or modifies the conditions of processes, are included in the scope of the present invention as long as they include the gist of the present invention.

[0042] In the first embodiment of the present invention, the protrusions 150 extend along the second direction D2 (short side, short side) direction, but the present invention is not limited to this. For example, a plurality of protrusions 150 may be provided partially spaced apart along the second direction D2. The protrusions 150 may also be arranged in a zigzag pattern with respect to the second direction D2.

[0043] In addition, in one embodiment of the present invention, the protrusions 150 are provided on both sides of the rib 140, but the present invention is not limited to this. The effect of the present invention can be achieved as long as the protrusions 150 are provided on at least one (one side) of the rib. Furthermore, if three or more protrusions are provided on one rib, the strength of the packaging container can be further improved.

[0044] In addition, although three ribs are provided in the first embodiment of the present invention, the present invention is not limited thereto. As long as at least one rib is provided on the packaging container 100, it can have a function of improving the strength against a force applied from the outside of the first flange portion 111. [Explanation of symbols]

[0045] 100···packaging container, 100A···packaging container, 110···flange portion, 110a···inner flange portion, 110A···flange portion, 110b···outer flange portion, 111···first flange portion, 111CP···center portion, 111P1···first portion, 111P2···second portion, 113···second flange portion, 113A···second flange portion, 113CP···center portion, 113P1···third portion, 113P2···second 4 parts, 115···corner flange part, 120···side part, 121···first side part, 123···second side part, 125···corner side part, 130···bottom part, 140···rib, 140-1···rib, 140-2···rib, 140-3···rib, 145···rib flat part, 150···projection part, 150-1-1···projection part, 150-1-2···projection part, 150-2-1···projection part, 150-2-2···projection part

Claims

1. A first flange portion provided in a first direction and corresponding to the long side; A second flange portion provided in a second direction intersecting the first direction and corresponding to the short side; At least one rib provided from the side surface portion to the bottom surface portion along the second direction, The rib is A rib flat portion; having at least one protrusion extending in the second direction; packaging container.

2. the at least one rib has a first protrusion provided on a first side of the bottom surface portion close to the second flange portion, and a second protrusion provided on a second side opposite to the first side of the bottom surface portion, The first protrusion and the second protrusion protrude upward from the bottom surface portion. The packaging container according to claim 1.

3. the at least one rib includes a first rib disposed on the bottom surface portion near the second flange portion, and a second rib adjacent to the first rib; The first rib has a 1-1 protrusion provided on a first side of the bottom surface portion close to one of the second flange portions, and a 1-2 protrusion provided on a second side opposite to the first side of the bottom surface portion, The second rib has a 2-1 protrusion provided on the first side of the bottom surface portion and a 2-2 protrusion provided on the second side of the bottom surface portion, The 1-1 protrusion, the 1-2 protrusion, the 2-1 protrusion, and the 2-2 protrusion protrude upward from the bottom surface portion. The packaging container according to claim 1.

4. The first-2 protrusion is higher than the first-1 protrusion, The 2-1 protrusion is higher than the 1-2 protrusion. The packaging container according to claim 3.

5. The first flange portion is provided in an arc shape such that a central portion of the first flange portion is disposed outside a first virtual line connecting a first portion of the first flange portion and a second portion opposite to the first portion. The packaging container according to claim 1.

6. The second flange portion is provided in an arc shape such that a central portion of the second flange portion is disposed outside a second virtual line connecting a third portion of the second flange portion and a fourth portion on an opposite side to the third portion. The packaging container according to claim 5.

7. In a cross-sectional view, the first flange portion and the second flange portion have a curved surface portion and a flat portion provided on the outer side of the curved surface portion. The packaging container according to claim 1.

8. The packaging container contains a non-foamable resin material. The packaging container according to any one of claims 1 to 7.

Images