Packaging containers

Abstract

To provide a packaging container having a reinforcing structure that contributes to ensuring design and also contributes to ensuring impact resistance and load resistance with a desired wall thickness. [Solution] The container comprises a container body 1 for accommodating the contents, and a lid body 2 that is attached to and surrounded by the container body 1. The lid body 2 comprises a cover portion 2a that covers the container body 1, and a flange portion 2b formed around the cover portion 2a. The flange portion 2b has an extension portion 23 that extends outward from the edge of the cover portion 2a, and a lid body fitting portion 24 (hereinafter also referred to as "lid body erection portion 24") that serves as a lid body erection portion that rises upward from the edge of the extension portion 23. The extension portion 23 is formed with a flange reinforcing portion 23a that protrudes in a bridging manner from the cover portion 2a side to the lid body erection portion 24 side.

Description

[Technical Field]

[0001] The present invention relates to a packaging container having a reinforcing structure at a predetermined portion. [Background technology]

[0002] Conventionally, for example, in packaging containers for food such as fresh produce and prepared foods sold in supermarkets and convenience stores, a reinforcing structure has been adopted to prevent deformation of parts that are particularly susceptible to deformation due to the impacts and loads caused by vibrations during delivery and stacking during display. The reinforcing structure is adopted for both the container body that contains the food and the lid that covers the container body.

[0003] Patent Document 1 discloses that providing a rib-like corner reinforcing structure at each corner of the bottom wall of the storage section and the top wall of the lid of a packaging container improves shape stability when the container is thinned, particularly stability when the lid is open (see paragraph "0034" and Figure 7). Patent Document 2 discloses that providing a bulging reinforcing section that extends along the corners formed on the peripheral wall and flange of the lid of a packaging container improves load resistance from above (see "Abstract"). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-144575 [Patent Document 2] Japanese Patent Application Publication No. 2018-83631 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the corner reinforcement structure of Patent Document 1 requires multiple elongated ribs to be formed on a small corner, which requires a complex mold and is difficult to mold, and is therefore conspicuous, which may limit the overall design of the container. Furthermore, the reinforcement portion of Patent Document 2 bulges outward from the lid widely, making it easily visible, which may make it difficult to see the contents inside the container. In other words, it is desirable for the reinforcement structure of a packaging container to be inconspicuous and not obstruct the view of the contents of the container.

[0006] Furthermore, when molding a packaging container from a thermoplastic resin sheet, to form protruding portions such as the ribs, the sheet is stretched to form the protruding portions, which are relatively thinner than the flat portions that are not stretched, and this may reduce the strength of these portions. In other words, as a countermeasure against shocks due to vibrations during delivery and loads due to stacking during display, it is desirable that the thickness of the protruding portions, which are particularly susceptible to external forces, is not reduced.

[0007] Therefore, a first object of the present invention is to provide a packaging container having a reinforcing structure that contributes to ensuring the overall design, and a second object of the present invention is to provide a packaging container having a desired thickness and a reinforcing structure that contributes to ensuring impact resistance and load resistance. [Means for solving the problem]

[0008] That is, the packaging container of the present invention is characterized by having a corner portion formed based on an apex composed of three flat surfaces, and the corner portion has a corner surface portion composed of a surface and a corner edge portion formed via a step from the peripheral edge of the corner surface. The surface forming the corner portion may be flat, spherical, or aspherical, but spherical or aspherical surfaces are more likely to provide a reinforcing effect for the corner than flat surfaces.

[0009] It is desirable that the corner surface portion and the corner edge portion are in an offset relationship.

[0010] The peripheral edge of the corner edge is preferably located at the boundary with each of the above planes.

[0011] The packaging container preferably comprises a container body and a lid to be attached to the container body, and the corners are preferably provided on the container body and / or the lid.

[0012] Furthermore, the packaging container of the present invention comprises a container body for accommodating the contents, and a lid body that is attached to the container body and is surrounded by the circumferential direction, and the lid body comprises a cover portion that covers the container body and a flange portion formed around the cover portion, and the flange portion has an extension portion that extends outward from the edge of the cover portion and a lid body erection portion that rises upward from the edge of the extension portion, and the extension portion is characterized in that a flange reinforcing portion is formed in the extension portion that protrudes in a bridging manner from the cover portion side to the lid body erection portion side.

[0013] The extension portion is formed continuously with the edge of the cover portion and has a peripheral rib portion that goes around the flange portion, and a flat portion that is formed continuously with the peripheral rib portion and has a height difference with the peripheral rib portion, and it is desirable that the flange reinforcement portion be connected to the peripheral rib portion side relative to the flat portion.

[0014] The lid upright portion preferably has a narrow, horizontal lid upright end portion corresponding to the outermost end of the lid.

[0015] The container body has a bottom, a side portion rising upward from the edge of the bottom, and a main body standing portion rising upward from the upper end of the side portion, and the side portion has a base portion formed so as to be recessed inward from near the upper end, and it is desirable that the flange reinforcement portion be formed in a position opposite the base portion.

[0016] Here, the "lid erection portion" and the "main body erection portion" may be flat and face each other when attached, or may be fitted together. In the present invention, "molding" means simply shaping or being formed without limiting the manufacturing method, and "molding" means shaping or being formed by fitting into a predetermined mold; in other words, "molding" includes "molding." "R-shaped" means a state in which the tip of a corner, such as a right angle, acute angle, or obtuse angle, which appears when two or more surfaces are combined is chamfered into a curved surface, and the degree of curvature may be quantified by the radius of curvature. [Effects of the Invention]

[0017] The packaging container of the present invention is expected to contribute to ensuring the overall design and also to providing a reinforcing structure that contributes to ensuring impact resistance and load resistance with a desired wall thickness. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a bottom perspective view of a packaging container according to a first embodiment of the present invention. [Figure 2] FIG. 1 is a schematic diagram illustrating the structure of the packaging container. [Figure 3] 2 is an enlarged view of the X1-X1 portion and the X2-X2 portion of FIG. 1. FIG. [Figure 4] FIG. 3 is a perspective view of another packaging container according to the first embodiment of the present invention. [Figure 5] FIG. 4 is a plan perspective view of a packaging container according to a second embodiment of the present invention. [Figure 6] FIG. 2 is a bottom perspective view of a lid provided on the packaging container. [Figure 7] FIG. [Figure 8] 7 is an enlarged view of the Y1-Y1 portion and the Y2-Y2 portion of FIG. 6. [Figure 9] 8 is an enlarged cross-sectional view of the Z2-Z2 portion of the Z1-Z1 portion of FIG. 7. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. 2 is a plan view of a container body provided in the packaging container. [Figure 16] FIG. 16 is a partial end view of the L1-L1 portion of FIG. [Figure 17] FIG. 16 is a partial end view of the L2-L2 portion of FIG. [Figure 18] FIG. 2 is a bottom view of the container body. [Figure 19] FIG. 2 is a front view of the container body. [Figure 20] FIG. 2 is a rear view of the container body. [Figure 21] FIG. 2 is a left side view of the container body. [Figure 22] FIG. 2 is a right side view of the container body. [Figure 23] 10A and 10B are a plan perspective view and a bottom perspective view, respectively, of a packaging container according to a third embodiment of the present invention. [Figure 24] 2A is a plan view of the packaging container, and FIG. 2B is a partially enlarged end view of the portion XX in FIG. 2A. [Figure 25] 4 is a state transition diagram of the packaging container when the lid is closed and opened. FIG. [Figure 26] FIG. 2 is a partially enlarged end view of a packaging container different from the packaging container described above. DETAILED DESCRIPTION OF THE INVENTION

[0019] First Embodiment The structure of a packaging container according to a first embodiment of the present invention (hereinafter also referred to as "first packaging container") will be described below with reference to Figures 1 to 4. In these figures, when there are multiple identical parts, only one part is numbered. For ease of explanation, certain parts and their leading lines are shown with hidden lines (broken lines), and cross sections are shown with hatching in some parts. In the explanation, terms indicating directions such as above, below, side, vertical direction, horizontal direction, etc. are basically based on the state in which the packaging container is installed in the orientation in which it is normally used, and when other references are used, they will be explained appropriately.

[0020] <Outline of the first packaging container> As shown in Figure 1, the first packaging container is a container body 1 for packaging contents such as fresh food, prepared foods, and boxed lunches sold in a retail store such as a supermarket. The first packaging container is large enough to be placed on a display shelf in a retail store, and preferably has a shape that allows two or more containers to be easily stacked together after packaging the contents and attaching a lid (not shown), and has strength and rigidity.

[0021] <Overview of container body 1> As shown in Fig. 1, the container body 1 comprises a bottom surface 11 on which the contents are placed, a body side wall 12 rising upward from the peripheral edge of the bottom surface 11, and body corners 13 formed by vertices formed by three planes of the bottom surface 11 and the body side walls 12, 12. The shape of the container body 1 in a plan view is pentagonal, but it may also be triangular or rectangular with more sides than a square, and is not limited thereto. The shapes and dimensions of the bottom surface 11 and the body side walls 12, 12 are not limited.

[0022] <Specifications of container body 1, including manufacturing method, material, dimensions, etc.> The container body 1 may be formed by thermoforming a synthetic resin sheet, for example, by sheet molding such as vacuum molding, hot plate pressure molding, vacuum pressure molding, or double-sided vacuum molding. The synthetic resin sheet may be made of, for example, a polyester resin such as polyethylene terephthalate, an olefin resin such as polyethylene or polypropylene, or a polystyrene resin, and may be formed as a single-layer or multi-layer sheet, and may be colored, colorless, transparent, or opaque. Furthermore, the front and / or back of the synthetic resin sheet may be covered with a synthetic resin film, and if the front is covered, it may be printed. The synthetic resin sheet may be made of either a foamed or non-foamed resin, but in the present invention, a non-foamed resin is more likely to achieve the desired effect. The thickness of the synthetic resin sheet is not particularly limited, but if it is made of a non-foamed resin, it should be 0.25 to 1 mm, preferably 0.3 to 0.8 mm, and more preferably 0.35 to 0.6 mm. If it is made of a low-foamed resin with an expansion ratio of 1.5 to 3 times, it should be 0.5 to 3 mm, preferably 1 to 2 mm. In the case of a highly expanded resin with an expansion ratio of 5 to 15, the thickness is 1.5 to 5 mm, preferably 2 to 4 mm, and more preferably 2.5 to 3.5 mm. The expansion ratio is calculated by measuring the specific volumes (unit: cc / g) of the foamed composition before expansion and the foamed sheet after expansion, and dividing the specific volume after expansion by the specific volume before expansion.

[0023] <Body corner 13> 2, main body corner 13 is formed based on vertex T formed by the intersection of bottom surface 11 and main body sidewalls 12, 12. In other words, main body corner 13 is formed based on vertex T determined by the angle formed between bottom surface 11 and main body sidewalls 12, 12 and the angle formed by main body sidewalls 12, 12, and is also formed based on vertex T determined by the three-dimensional coordinates of bottom surface 11 and the three-dimensional coordinates of main body sidewalls 12, 12.

[0024] The main body corners 13 are formed in a spherical or aspherical shape due to the so-called R-shaped angle between the bottom surface 11 and the main body side walls 12, 12 and the angle between the main body side walls 12, 12, but specifications including the radius of the R-shape are not limited and may be determined according to the specifications of the container body 1. The main body corners 13 have a shape obtained by deforming an imaginary main body corner (not shown) that is formed continuously with the bottom surface 11 and the main body side walls 12, 12 based on the vertex T without any steps in between, or in other words, a shape that reinforces the imaginary main body corners.

[0025] As shown in Fig. 3, the main body corner 13 has a spherical or aspherical main body corner surface 13a and a curved main body corner edge 13b formed with a step from the peripheral edge of the main body corner surface 13a. The main body corner surface 13a is recessed inward from the main body corner edge 13b relative to the container body 1, but may also protrude outward. The main body corner surface 13a is located approximately in the center of the main body corner 13, but may also be positioned offset to the top, bottom, left, or right.

[0026] With this configuration, the stress on the main body corner 13 is distributed to the main body corner surface 13a and the main body corner edge 13b compared to the imaginary main body corner, so not only can a substantial reinforcement effect be expected, but compared to the multiple long, thin ribs that have been used as conventional corner reinforcement structures, it is easy to mold into a simple shape, is less noticeable, and makes it easier to select a design for the container body 1, and is expected to have the effect of making it easier to ensure thickness because the area that is stretched during molding is smaller.

[0027] As shown in FIG. 3, the main body corner surface 13a and the main body corner edge 13b are offset from each other. The offset refers to the creation of a new shape by uniformly offsetting a fixed distance from a reference shape. That is, the main body corner surface 13a and the main body corner edge 13b are formed by uniformly offsetting a fixed distance from a reference imaginary main body corner. Specifically, the main body corner 13 is formed so that the main body corner surface 13a is located approximately in the center and the main body corner edge 13b has a uniform width around its circumference. In other words, the distance from the outer circumferential edge 13b (corresponding to the upper end of the main body corner edge 13b) to the inner circumferential edge 13b (corresponding to the lower end) is uniform. Here, the fixed distance may be, for example, 0.2 to 2.0 mm, preferably 0.3 to 1.5 mm, and even more preferably 0.4 to 1.0 mm.

[0028] According to this configuration, it is easy to design the strength of the main body corner portion 13, and since it is simpler and less noticeable, it is expected that the design of the main body corner portion 13 will be easily improved.

[0029] Furthermore, the main body corner surface portion 13a, which is offset from the main body corner edge portion 13b, may be provided with protrusions or ribs as long as the function is not impaired. Furthermore, there is no particular limitation on the area of ​​the main body corner surface portion 13a, but it is preferably 30 to 200 mm 2 That's fine.

[0030] As shown in Figure 3, the outer peripheral edge 13b of the main body corner 13b is located at the boundary between the bottom surface 11 and the main body side walls 12, 12, which are each a flat surface. In other words, the outer peripheral edge 13b is the boundary between the imaginary main body corner and the bottom surface 11 and the main body side walls 12, 12, and is also the outer peripheral edge of the imaginary main body corner. The boundary is the point where the change in angle of the tangent to the main body corner 13b is zero, and also the point where the angle of the tangent is equal to the angle between the bottom surface 11 and the main body side walls 12, 12.

[0031] With this configuration, the range of the main body corner portion 13 is maximized, and therefore the range of the main body corner surface portion 13a can also be maximized, making it easier to obtain the desired strength and to avoid damage to the main body corner portion 13.

[0032] 4, the first packaging container may include a container body 1 and a lid body 2 attached to the container body 1. The reinforcing structure for the main body corners 13 may be provided in the container body 1 and the lid body 2, or may be provided only in the lid body 2.

[0033] <Second embodiment> The structure of a packaging container (hereinafter also referred to as "second packaging container") in a second embodiment of the present invention will be described below with reference to Figures 5 to 9. In these figures, when there are multiple identical parts, only one part is numbered. For ease of explanation, certain parts and their leading lines are shown with hidden lines (dashed lines), and cross sections are shown with hatching in some parts. In the explanation, terms indicating directions such as above, below, side, vertical direction, horizontal direction, etc. are basically based on the state in which the packaging container is installed in the orientation in which it is normally used, and if other references are used, they will be explained as appropriate. Some parts are explained in the same way as those explained in the first embodiment, but some parts are omitted as appropriate.

[0034] <Outline of the second packaging container> As shown in FIG. 5, the second packaging container comprises a container body 1 for accommodating contents, and a lid body 2 attached to the container body 1 by fitting therein.

[0035] <Overview of container body 1> As shown in Figure 5, the container body 1 has a bottom surface portion 11 on which the contents are placed, a body side wall portion 12 that rises upward from the edge of the bottom surface portion 11, and a body fitting portion 13 that serves as a body upright portion that rises upward from the upper end of the body side wall portion 12.

[0036] <Overview of Lid 2> As shown in FIGS. 5 to 7, the lid 2 includes a cover portion 2a that covers the container body and a lid flange portion 2b formed around the cover portion 2a. Specifically, the lid 2 includes the cover portion 2a, which is formed by a planar top surface 21 and a lid sidewall portion 22 that extends downward from the peripheral edge of the top surface 21, and the lid flange portion 2b that extends outward from the lower edge of the lid sidewall portion 22. The lid flange portion 2b includes an extension portion 23 that extends outward from the edge of the cover portion 2a and a lid fitting portion 24 that serves as a lid erection portion that extends upward from the edge of the extension portion 23. The extension portion 23 is formed with a flange reinforcing portion 23a that protrudes in a bridging manner from the cover portion 2a side to the lid fitting portion 24 side. The flange reinforcing portion 23a is recessed downward relative to the extension portion 23, but may also protrude upward.

[0037] According to this configuration, the flange reinforcing portion 23a crosses the short direction of the extension portion 23, which tends to improve the strength of the lid flange portion 2b including the extension portion 23. In other words, the thinner the lid 2, the more easily it twists, making it difficult to attach and detach, and there is a risk of it being damaged during this action. Therefore, by having the flange reinforcing portion 23a reinforce the extension portion 23 interposed between the cover portion 2a and the lid fitting portion 24, the above-mentioned effects can be expected.

[0038] <Specifications for the lid 2, including the manufacturing method, materials, dimensions, etc.> The lid 2 may be formed by thermoforming a synthetic resin sheet using sheet molding techniques such as vacuum molding, hot plate pressure molding, vacuum pressure molding, and double-sided vacuum molding. The synthetic resin sheet may be made of, for example, a polyester resin such as polyethylene terephthalate, an olefin resin such as polyethylene or polypropylene, or a polystyrene resin such as biaxially oriented polystyrene (OPS; Oriented Polystyrene), and may be formed as a single-layer or multi-layer sheet. It is preferably colorless and transparent, but may also be colored or opaque. Furthermore, the front and / or back of the synthetic resin sheet may be covered with a synthetic resin film, and if the front is covered, it may be printed. The synthetic resin sheet may be made of either a foamed or non-foamed resin, although in the present invention, a non-foamed resin is more likely to achieve the desired effect. There are no particular limitations on the thickness of the synthetic resin sheet; in the case of a non-foamed resin, it may be 0.18 to 1 mm, preferably 0.23 to 0.75 mm, and more preferably 0.25 to 0.5 mm. There is no particular limitation on the size of the container body, but it may be, for example, 150 to 350 mm wide and 150 to 350 mm deep.

[0039] <Cover part 2a · Lid flange part 2b> As shown in FIG. 5, the height of the cover portion 2a may be 1 / 30 to 1 / 10 of the shorter of the length in the longitudinal or lateral directions. The area of ​​the top surface 21 and the height of the lid side wall 22 may be any, and the amount of expansion of the cover portion 2a determined by these may be any, and the shape is not limited to a spherical dome or an angular box. The height of the lid flange 2b may be higher, lower, or equal to that of the cover portion 2a. Here, a design with a step around the top surface 21 is preferred so that the bottom of the container body 1 fits into the cover portion 2a when stacked on the lid 2. In the above design, the amount of expansion of the cover portion 2a (i.e., the height of the step) is preferably 4 mm or more, more preferably 5 mm or more. This configuration makes it difficult for the upper packaging container to shift when stacked one on top of the other.

[0040] <Extension part 23> As shown in FIGS. 8 and 9 , the extension 23 has a circumferential rib 23b that is continuous with the edge of the cover 2a and a flat portion 23c that is continuous with the circumferential rib 23b. The flange reinforcing portion 23a is formed on the circumferential rib 23b side relative to the flat portion 23c. In other words, the extension 23 may be flat from the lower edge of the lid sidewall 22, which is the edge of the cover 2a, to the lower edge of the lid fitting portion 24, which is the edge of the lid flange 2b. Alternatively, the extension 23 may have a circumferential rib 23b that is continuous with the lower edge of the lid sidewall 22, or a flat portion 23c that is continuous with the circumferential rib 23b at a position higher than the lower edge of the lid sidewall 22. The flange reinforcing portion 23a is recessed downward relative to the flat portion 23c, in the same direction as the circumferential rib 23b formed below it. The flange reinforcing portion 23a is formed continuous with the circumferential rib 23b, but it may also be formed separately and not continuous with the circumferential rib 23b.

[0041] According to this configuration, the peripheral rib portion 23b circumferentially surrounds the edge of the cover portion 2a, which further improves the strength of the lid flange portion 2b including the extension portion 23. That is, because the extension portion 23 has two stages, the peripheral rib portion 23b and the flat portion 23c, it is expected that the cover portion 2a will be even less susceptible to twisting, and also, because the reinforcement direction is two-directional, with the flange reinforcing portion 23a and the peripheral rib portion 23b intersecting at right angles, the above-mentioned effects can be expected.

[0042] <Flange reinforcement portion 23a> As shown in Figures 8 and 9, the flange reinforcement portion 23a has a protruding bottom portion (not shown) and a protruding wall portion rising upward from the edge of the protruding bottom portion, except on the lid side wall portion 22 side. The protruding bottom portion is continuous with the peripheral rib portion 23b. The protruding wall portion is continuous with the peripheral rib portion 23b, the flat portion 23c, and the lid fitting portion 24. The flange reinforcement portion 23a has a short side width that is narrower than the distance between the lid side wall portion 22 and the lid fitting portion 24, and the protruding wall portion is tapered toward the protruding bottom portion, which facilitates reinforcement. The flange reinforcement portions 23a may be arranged at equal intervals around the circumferential direction of the extension portion 23, or may be arranged arbitrarily. The flange reinforcement portions 23a are arranged on linear portions of the extension portion 23, but may also be arranged on corner portions.

[0043] <Circumferential rib portion 23b> As shown in Figures 8 and 9, the circumferential rib portion 23b has a circumferential rib bottom portion (not numbered) and a circumferential rib side wall portion (not numbered) that curves upward from the circumferential rib bottom portion. The circumferential rib bottom portion is formed from the lower edge of the lid side wall portion 22 toward the lower edge of the lid fitting portion 24. The circumferential rib side wall portion is continuous with the flat portion 23c. The distance from the circumferential rib bottom portion to the flat portion 23c, which corresponds to the upper end of the circumferential rib side wall portion, is equal to the height of the flange reinforcing portion 23a and is not particularly limited. The tapered shape of the lid side wall portion 22 and the circumferential rib side wall portion that narrows toward the circumferential rib bottom portion facilitates the provision of a reinforcing effect.

[0044] <Flat part 23c> 8 and 9, the flat portion 23c is located between and continuous with the peripheral rib portion 23b and the lid fitting portion 24. The flat portion 23c is substantially horizontal, but may be inclined downward or upward toward the lid fitting portion 24.

[0045] <Lid fitting portion 24, lid fitting end portion 24a> 5 and 9, the lid fitting portion 24 is a portion that fits into the container body fitting portion 13 of the container body 1, and is generally S-shaped in end view, with a lid fitting end portion 24a as a narrow, horizontal lid upright portion that corresponds to the outermost end of the lid 2. The lid fitting end portion 24a corresponds to the cutting point during molding of the lid 2, and is generally horizontal in end view, but may be inclined upward or downward at a predetermined angle. The distance W from the inner edge to the outer edge of the lid fitting end portion 24a does not need to include the cutting margin.

[0046] With this configuration, the distance W of the lid body fitting end portion 24a is the shortest, making it easier to increase the production volume of lid bodies 2 per molded sheet, and also, when attached to the container body 1, the lid body fitting end portion 24a is more likely to adhere to the container body 1 and is less likely to protrude outside the container body 1, making it less likely that the lid body fitting end portion 24a will be easily pinched, which is expected to have the effect of preventing tampering.

[0047] 10 to 14 show the lid body 2 in each embodiment, and the numbering and other explanations will be omitted.

[0048] <Main body side wall 12 / base 12a> As shown in FIGS. 5 and 15 , the main body sidewall 12 has a base 12a recessed inward from near its upper end. The lower end of the main body sidewall 12 and the lower end of the base 12a are located on the edge of the bottom surface 11, but the lower end of the base 12a may be located on the main body sidewall 12. The base 12a has a base side 12as formed inward and continuous with the main body sidewall 12, a base front 12af formed continuous with the base side 12as, and a base top 12ab. As shown in FIGS. 16 and 17 , the main body sidewall 12 is inclined at an angle of 30 to 70 degrees relative to the bottom surface 11, while the base front 12af is inclined at an angle of 10 to 20 degrees more than the main body sidewall 12. That is, the main body sidewall 12 has an uneven shape near its upper end in a horizontal end view, with the depth of the unevenness increasing toward the upper end.

[0049] <Relationship between flange reinforcing portion 23a and base portion 12a> 5, flange reinforcing portion 23a is formed at a position facing base portion 12a. With this configuration, when attached to container body 1, lid body 2 is supported by base portion 12a and flange reinforcing portion 23a comes into contact with base portion 12a, making it easier to obtain a reinforcement effect.

[0050] 18 to 22 show the container body 1 in each embodiment, and the numbering and other explanations will be omitted.

[0051] <Third embodiment> The structure of a packaging container according to a third embodiment of the present invention (hereinafter also referred to as the "third packaging container") will be described below with reference to Figures 23 to 26. In these figures, when there are multiple identical parts, only one part is numbered. For ease of explanation, some cross-sectional parts are shown with hatching. In the explanation, terms indicating directions such as up, down, side, vertical direction, horizontal direction, etc. are basically based on the state in which the packaging container is installed in the orientation in which it is normally used, and if other references are used, they will be explained as appropriate. Some parts are explained in the same way as those explained in the first and second embodiments, but some parts are omitted as appropriate.

[0052] <Outline of the third packaging container> The third packaging container is used to package contents such as fresh food, prepared foods, and boxed lunches sold in supermarkets and other retail stores, and is equipped with a container body 1 that contains the contents, and a lid body 2 that closes the opening of the container body 1. The third packaging container is large enough to be placed on a display shelf in a retail store, and preferably has a shape that allows two or more containers to be easily stacked with their contents packaged, and is strong and rigid.

[0053] <Overview of container body 1> As shown in Figure 23, container body 1 has a storage section 1a for storing contents. Specifically, container body 1 includes storage section 1a formed by bottom surface 11 on which contents are placed, body side wall 12 rising continuously upward from the peripheral edge of bottom surface 11, body fitting section 13 rising continuously upward from the upper edge of body side wall 12 for internal fitting with lid 2, body outer wall 14 rising continuously upward from the upper edge of body fitting section 13, and overlapping pieces 15 extending continuously outward from the upper edge of body fitting section 13 and the outer edge of body outer wall 14. The shape of container body 1 in a plan view is a pentagon like a square with one corner cut off, and is composed of two long sides perpendicular to each other, two short sides perpendicular to the adjacent long sides, and inclined sides inclined with respect to both short sides, but it may be a rectangle, a hexagon, or more.

[0054] <Overview of Lid 2> 23, the lid 2 has a cover portion 2a that covers the storage portion 1a of the container body 1 and a knob piece 26 that extends outward from the cover portion 2a. In detail, the lid 2 has the cover portion 2a formed by a planar top surface 21 and a lid side wall portion 22 that extends downward continuously from the peripheral edge of the top surface 21, a lid flange portion 23 that extends outward continuously from the lower edge of the lid side wall portion 22, a lid fitting portion 24 that extends upward continuously from the outer edge of the lid flange portion 23 for internal fitting with the container body 1, a lid outer end portion 25 that extends outward continuously from the upper edge of the lid fitting portion 24, and a knob piece 26 that extends outward from the cover portion 2a. The shape of the lid 2 in a plan view is the same as that of the container body 1 in a plan view, but may be different.

[0055] <Specifications of container body 1, including manufacturing method, material, dimensions, etc.> The container body 1 may be formed by thermoforming a synthetic resin sheet using sheet molding techniques such as vacuum molding, hot plate pressure molding, vacuum pressure molding, and double-sided vacuum molding. The synthetic resin sheet may be made of, for example, a polyester resin such as polyethylene terephthalate, an olefin resin such as polyethylene or polypropylene, or a polystyrene resin, and may be formed as a single-layer or multi-layer sheet, and may be colored, colorless, transparent, or opaque. Furthermore, the front and / or back surfaces of the synthetic resin sheet may be covered with a synthetic resin film, and if the front surface is covered, it may be printed. The synthetic resin sheet may be made of either a foamed or non-foamed resin, but in the present invention, a non-foamed resin is more likely to achieve the desired effect. The thickness of the synthetic resin sheet is not particularly limited, but if it is made of a non-foamed resin, it should be 0.25 to 1 mm, preferably 0.3 to 0.8 mm, and more preferably 0.35 to 0.6 mm. If it is made of a low-foamed resin with an expansion ratio of 1.5 to 3 times, it should be 0.5 to 3 mm, preferably 1 to 2 mm. Furthermore, when the container is made of a highly expanded resin with an expansion ratio of 5 to 15 times, the thickness is 1.5 to 5 mm, preferably 2 to 4 mm, and more preferably 2.5 to 3.5 mm. The expansion ratio is calculated by measuring the specific volume (unit: cc / g) of the foamed composition before expansion and the expanded foam sheet, and dividing the specific volume after expansion by the specific volume before expansion. There are no particular restrictions on the size of the container body, but it may be, for example, 150 to 350 mm wide and 150 to 350 mm deep.

[0056] <Specifications for the lid 2, including the manufacturing method, materials, dimensions, etc.> The lid 2 may be formed by thermoforming a synthetic resin sheet using sheet molding techniques such as vacuum molding, hot plate pressure molding, vacuum pressure molding, and double-sided vacuum molding. The synthetic resin sheet may be made of, for example, a polyester resin such as polyethylene terephthalate, an olefin resin such as polyethylene or polypropylene, or a polystyrene resin such as biaxially oriented polystyrene (OPS; Oriented Polystyrene), and may be formed as a single-layer or multi-layer sheet. It is preferably colorless and transparent, but may also be colored or opaque. Furthermore, the front and / or back of the synthetic resin sheet may be covered with a synthetic resin film, and if the front is covered, it may be printed. The synthetic resin sheet may be made of either a foamed or non-foamed resin, although in the present invention, a non-foamed resin is more likely to achieve the desired effect. There are no particular limitations on the thickness of the synthetic resin sheet; in the case of a non-foamed resin, it may be 0.18 to 1 mm, preferably 0.23 to 0.75 mm, and more preferably 0.25 to 0.5 mm. There is no particular limitation on the size of the container body, but it may be, for example, 150 to 350 mm wide and 150 to 350 mm deep.

[0057] The detailed structure of the container body 1 will be described below.

[0058] <Storage section 1a> As shown in Figure 23, the area of ​​the bottom surface 11 and the height of the main body sidewall 12 may be any, and the capacity of the storage section 1a determined by these is not particularly limited, but may be, for example, 200 to 1500 cc. The main body sidewall 12 may have one or more predetermined steps in the vertical or horizontal direction or recessed reinforcing ribs (not shown), or it may be flush with the container. The opening of the storage section 1a, which corresponds to the opening of the container main body 1, is formed by the upper edge of the main body sidewall 12.

[0059] <Main body fitting portion 13> 24, the main body fitting portion 13 has a generally L-shaped cross section in the vertical direction, is formed circumferentially from the entire upper edge of the main body side wall portion 12, and may protrude outward from the main body side wall portion 12. The main body fitting portion 13 may be of any height.

[0060] <Main body outer wall 14> As shown in FIG. 24 , the main body outer wall 14 is circumferentially formed except for a portion of the upper edge of the main body fitting portion 13. In other words, the main body outer wall 14 is circumferentially formed except for a portion near the center of the upper edge of the main body fitting portion 13, which corresponds to the inclined side in a plan view of the container body 1, and protrudes outward from the main body fitting portion 13. The main body outer wall 14 has a main body outer wall inner end portion 14a located at the innermost side and a main body outer wall outer end portion 14b located at the outermost side. In vertical cross section, the main body outer wall 14 has a flat-topped mountain shape, but may also have a generally triangular or arc shape. The height H of the main body outer wall 14, specifically the distance from the lower end to the upper end of the main body outer wall inner end portion 14a, is 3 to 8 mm, preferably 4 to 6 mm, and more preferably 4.5 to 5.5 mm. If it is less than 3 mm, fingers may easily reach the lid outer end portion 25, potentially reducing sealing performance. If it is more than 8 mm, it protrudes too much, potentially reducing moldability.

[0061] <Overlapping piece 15> 24, the overlapping piece 15 faces outward from the storage section 1a so as to overlap with the tab piece 26 when the lid is closed. In other words, it is a flat portion located outside the storage section 1a and formed so that the tab piece 26 can be placed thereon. It is also a portion that sandwiches the tab piece 26. More specifically, it has a base end piece 15a that leads to the storage section 1a, a folded piece 15b that is continuous with the base end piece 15a, a hinge 15c located between the base end piece 15a and the folded piece 15b, and a pair of fixing portions 15d, 15e that are formed on the base end piece 15a and the folded piece 15b, respectively, with the hinge 15c sandwiched between them. Here, the size of the overlapping piece 15 is not particularly limited, but it can be, for example, 15 to 35 cm. 2 It is good if it is 20~30cm 2 If so, even better.

[0062] This configuration ensures that at least the tip of the handle 26 is hidden by overlapping the overlapping piece 15. Specifically, the handle 26 is sandwiched between the base piece 15a and the fold-back piece 15b. Therefore, after the fold-back piece 15b is folded back to secure the pair of fastening portions 15d and 15e, the handle 26 is not revealed and the lid cannot be opened unless the fold-back piece 15b is detached and the fold-back piece 15b is folded back. This effectively deters unauthorized opening of the lid 2 and makes it easy to identify whether the lid has been opened or not. Furthermore, because a series of actions are required for opening, the design is highly eye-catching for consumers. Furthermore, since the design is safe as long as no sharp edges are exposed even after the fastening portion 15e is detached, the design is likely to be recognized as a user-friendly opening structure. Furthermore, since the container body 1 can be molded from a material suitable for the fastening strength of the fastening portions 15d and 15e, the design allows for greater flexibility in determining the material, rigidity, and strength of the lid 2.

[0063] Furthermore, overlapping piece 15 has a breaking portion 15f formed to surround at least fixing portion 15e on the folded-back piece 15b side. Specifically, breaking portion 15f may surround fixing portion 15e approximately halfway around and reach hinge 15c, or may surround the entire circumference in a circular shape. This configuration allows fixing portion 15d to be easily separated from folded-back piece 15b by breaking breaking portion 15f. Since no sharp edges are exposed upon breaking, safety is enhanced. This is expected to facilitate the determination of the specifications of container body 1 using a material suitable for the breaking strength of breaking portion 15f.

[0064] <Proximal piece 15a> 24, base piece 15a indirectly communicates with storage section 1a via main body fitting section 13, but it may also communicate directly without any separation. Base piece 15a is formed at a position sandwiched between the circumferential ends of main body outer wall section 14, which is formed in a circumferential shape, in other words, formed at a location where a portion of main body outer wall section 14 is cut out, and there are no restrictions on its shape, area, or dimensions.

[0065] <Folded piece 15b> As shown in FIG. 24, the folded piece 15b is formed integrally with the base piece 15a and continues outward from the outer edge of the base piece 15a. Specifically, it continues outward from the outer edge of the base piece 15a located on the opposite side from the storage section 1a, and includes a folded tip piece 15bt. The outer edge of the folded piece 15b is continuous with the outer end portion 14b of the main body outer wall. When the folded piece 15b is not folded back, the folded piece 15b and the outer end portion 14b of the main body outer wall form the outermost end of the container body 1. The folded piece 15b has a triangular shape in a plan view, but the shape, area, and dimensions are not limited thereto.

[0066] <Hinge 15c> As shown in Figure 24, hinge 15c is located on the outer edge of base piece 15a, specifically, on the outer edge of base piece 15a opposite housing section 1a. In other words, hinge 15c is located so that folded section 15b bends toward housing section 1a. Hinge 15c is a portion processed into overlapping piece 15 after molding. It may be a perforation where uncut and cut sections are alternately formed, or a portion thinner and more easily bent than base piece 15a and folded section 15b, a member connecting separately molded folded section 15b to base piece 15a, or a portion where integrally molded base piece 15a and folded section 15b are simply bent. Hinge 15c may or may not extend to outer end 14b of the main body outer wall.

[0067] <Fixed portions 15d, 15e> As shown in FIG. 24, the fastening portions 15d and 15e are generally the same shape and size and are snap-fit ​​portions that protrude downward when fastened together when the lid is closed. While they may protrude upward, downward protrusion is preferable in consideration of the impact on the opening operation of the lid body 2 and the carrying and stacking of the packaging container. The fastening portions 15d and 15e may be thermocompression-bonded rather than snap-fit. The fastening portions 15d and 15e are positioned near the center of the base end piece 15a or the folded piece 15d and equidistant from the hinge 15c, but may also be positioned in relation to the tab piece 26. The fastening portions 15d and 15e may be detached from the base end piece 15a or the folded piece 15b by breaking or deforming them using a predetermined means, in addition to separation by the breaking portion 15f.

[0068] <Break section 15f> As shown in Figure 24, breaking portion 15f surrounds fixing portion 15e on the folded piece 15b side and extends to hinge 15c. With this configuration, breaking portion 15f allows folding piece 15b to rotate freely around hinge 15c, excluding fixing portion 15e, so that handle piece 26 can be exposed without cutting off folding piece 15b, which is expected to eliminate the effort required to remove the scraps.

[0069] Breaking portion 15f is a perforation formed by alternating non-cut portions and cut portions, and surrounds only fixed portion 15e. Breaking of breaking portion 15f allows folded piece 15b to rotate freely about hinge 15c from the fixed state of fixed portions 15d, 15e. However, if both fixed portions 15d, 15e are surrounded, breaking of breaking portion 15f may remove fixed portions 15d, 15e while leaving them in a fixed state, making fixed portions 15d, 15e separable from folded piece 15b and base end piece 15a. The non-cut portion of breaking portion 15f may be 1 to 5 mm, and the cut portion may be 10 to 50 mm. In order for the breaking portion 15f to break before the fixing portions 15d and 15e come apart, it is preferable that the breaking strength of the breaking portion 15f be smaller than the fitting strength of the fixing portions 15d and 15e.

[0070] The detailed structure of the lid 2 will be described below.

[0071] <Cover part 2a> As shown in Figure 25, the area of ​​the top surface 21 and the height of the lid side wall 22 may be any, and the amount of expansion of the cover 2a determined by these may be any, and the shape is not limited to a spherical dome or an angular box. The lid side wall 22 may have one or more predetermined steps or inwardly recessed reinforcing ribs (not shown) in the vertical or horizontal directions, or may be flush with the cover. The cover 2a has a cover recess 2b formed by cutting out a portion of the top surface 21 and the lid side wall 22 so as to recess inward.

[0072] <Lid fitting portion 24> 24, the lid fitting portion 24 has a generally L-shaped cross section in the vertical direction, is formed circumferentially around the entire outer edge of the lid flange portion 23, and may protrude outward from the lid flange portion 23. The height of the lid fitting portion 24 may be any height as long as it is approximately the same as the height of the main body fitting portion 13.

[0073] <Lid outer end 25> 24, the lid outer end 25 is formed circumferentially except for a portion of the upper edge of the lid fitting portion 24, in other words, is formed circumferentially except for a portion near the center of the upper edge of the lid fitting portion 24 that corresponds to the inclined side in a plan view of the container body 1. The lid outer end 25 may include a tab 26, in other words, a portion of the lid outer end 25 may be formed as the tab 26. The width W of the lid outer end 25, specifically the distance from the innermost end to the outermost end of the lid outer end 25, is 0.5 to 5 mm, preferably 1.5 to 4 mm, and more preferably 2 to 3.5 mm. If it is shorter than 0.5 mm, the strength and rigidity of the lid 2 may be reduced, and if it is longer than 5 mm, it may protrude too much and reduce moldability.

[0074] <Knob piece 26> As shown in FIG. 24, the tab 26 is located outside the cover portion 2a and extends outward from the lid outer end 25. Alternatively, the tab 26 may extend outward from the upper edge of the lid fitting portion 24 or the lid flange portion 23. The tab 26 extends so as not to reach the hinge 15c, and protrudes 6 to 16 mm, preferably 8 to 14 mm, from the outermost end of the lid outer end 25. The tab 26 has two tongues 26a and 26b, each of which is parallel to the hinge 15c and spaced a predetermined distance apart from the fixing portion 15d so as to sandwich the fixing portion 15d from both sides. Instead of having the two tongues 26a and 26b, the tab 26 may have a through-hole (not shown) near the center that is larger than the fixing portion 15d and does not overlap with the fixing portion 15d when the lid is closed.

[0075] The relationship between the container body 1 and the lid body 2 that enhances the effects of the overlapping piece 15 described above will be described below.

[0076] 24, the lid 2 has a lid outer end 25 including a handle piece 26, and the container body 1 has a body outer wall 14 formed outside the storage section 1a and facing the lid outer end 25, excluding the handle piece 26, when the lid is closed, and preferably in close contact with it. With this configuration, the lid outer end 25 is surrounded by the body outer wall 14, and no part that can be gripped when the lid is opened is exposed, excluding the handle piece 26, making it difficult to open the lid 2 fraudulently, and this is expected to enhance the effect of the overlap piece 15.

[0077] 24, lid outer end 25 extends outward from lid fitting portion 24 located outward from cover portion 2a, and main body outer wall portion 14 extends upward from main body fitting portion 13 located above storage portion 1a. With this configuration, lid 2 fits inside container main body 1, improving the airtightness of lid 2 and making unauthorized opening of lid 2 more difficult, which is expected to further enhance the effect of overlapping piece 15.

[0078] 24, tab 26 is made up of tongues 26a and 26b, and fixing portion 15d on base piece 15a is formed to be located between tongues 26a and 26b when the lid is closed. With this configuration, even if specifications such as the size and position of tab 26 and fixing portion 15d and the spacing between tongues 26a and 26b are not strictly determined, fixing portions 15d and 15e can be fixed to each other and tab 26 can be sandwiched together with base piece 15a by folding back tab 15b, which is expected to facilitate the formation of a structure that prevents unauthorized opening of lid 2.

[0079] 24, folding piece 15b has folding tip piece 15bt at a position opposite hinge 15c, and cover portion 2a has cover recess 2b that accommodates folding tip piece 15bt when folded. With this configuration, folding portion 15b is folded back to fasten fixing portions 15d and 15e when the lid is closed, but folding tip piece 15bt is expected to be accommodated in cover recess 2b and not protrude beyond top surface portion 21, and folding tip piece 15bt can be easily grasped by inserting a finger through cover recess 2b when the lid is opened.

[0080] <Example of how to use the third packaging container> As shown in Figures 25(a) and (b), the method of using the third packaging container includes the steps of storing an item in the storage section 1a of the container body 1, placing the handle piece 26 of the lid body 2 on the base end piece 15a of the container body 1 with respect to the container body 1 containing the item, and engaging the body internal fitting 13 shown in Figure 24 with the lid body fitting section 24, folding back the fold piece 15b of the container body 1 to cover the handle piece 26 with the fold piece 15b and hide the end of the handle piece 26, and fixing the fixing sections 15d and 15e to each other.

[0081] According to this process, simply by closing the opening of the container body 1 with the lid body 2, the handle piece 26 can be positioned so that the tongue pieces 26a, 26b pinch the fixing portion 15d of the base end piece 15a. In other words, simply by placing the handle piece 26 on the base end piece 15a, the position of the lid body that closes the opening of the container body 1 can be determined, so the lid can be closed easily without hesitation.Furthermore, simply by folding the fold piece 15b at the hinge 15c and pressing it to the extent that the fixing portions 15d, 15e are fixed, it is expected that the effect of completing the structure to prevent tampering can be achieved.

[0082] <An example of a method for opening the third packaging container> As shown in Figures 25(b) and (c), the third method of opening a packaging container includes a step of separating at least the fixed portion 15e from the folded piece 15b by a predetermined deformation or destruction of a packaging container containing contents packed in the above-mentioned method of use, specifically, a step of inserting the thumb and index finger into the cover recess 2b to pinch the folded tip piece 15bt of the folded piece 15b, and folding back the folded piece 15b while keeping the fixed portions 15d and 15e fixed, while cutting the breaking portion 15f and separating the folded piece 15b from the base end piece 15a, thereby exposing the handle piece 26.

[0083] According to this process, when the lid is opened, the folded piece 15b is folded in a plan view and the handle piece 26 is hidden, making it eye-catching and easy to recognize the tamper-proof structure at a glance.The folded tip piece 15bt can be easily grasped through the cover recess 2b, and by simply returning the folded piece 15b, the breaking portion 15f can be broken and the fixed portion 15e can be easily separated from the folded piece 15b, so that the lid can be opened easily and without hesitation.

[0084] Next, with reference to Fig. 26, another packaging container according to the third embodiment of the present invention will be described in terms of the differences from the packaging container described above, and a description of equivalent parts will be omitted. For ease of reference, parts or portions equivalent to those shown in Figs. 23 to 25 are uniformly numbered by adding 100 or 200 in Figs. 26(a) and (b). Here, FIG. 26 is the same as FIG. 24(b), that is, a partially enlarged end view of a predetermined portion of another packaging container, and explains the fitting pattern between the container body and the lid.

[0085] As shown in Figure 26(a), the container body 101 comprises a storage section 101a, a flat body flange section 116a extending continuously outward from the upper edge of the unnumbered body side wall section that forms the storage section 101a, a body fitting section 113 that falls continuously downward from the outer edge of the body flange section 116a for external side fitting with the lid body 102, a flat body flange section 116b extending continuously outward from the lower edge of the body fitting section 113, a body outer wall section 114 that rises continuously upward from the outer edge of the body flange section 116b, and an overlapping piece (not shown or numbered) that extends continuously outward from the outer edge of the body flange section 116b excluding the body outer wall section 114.

[0086] The lid body 102 comprises a cover portion 102a, a lid body flange portion 123 extending continuously outward from the lower edge of the lid body side wall portion (not numbered) that forms the cover portion 102a, a lid body fitting portion 124 that extends continuously downward from the outer edge of the lid body flange portion 123 for external side fitting with the container body 101, a lid body outer end portion 125 extending continuously outward from the lower edge of the lid body fitting portion 124, and a knob piece (not shown and not numbered).

[0087] As shown in Figure 26(b), the container body 201 comprises a storage section 201a, a convex body fitting section 213 that protrudes continuously outward and upward from the upper edge of the unnumbered body side wall section that forms the storage section 201a for internal and external fitting with the lid body 202, a flat body flange section 216 that extends continuously outward from the outer edge of the body fitting section 213, a body outer wall section 214 that rises continuously upward from the outer edge of the body flange section 216, and an overlapping piece that is neither shown nor numbered and that extends continuously outward from the outer edge of the body flange section 216 excluding the body outer wall section 214.

[0088] The lid body 202 comprises a cover portion 202a, a lid body flange portion 223 extending continuously outward from the lower edge of the lid body side wall portion (not numbered) that forms the cover portion 202a, a convex lid body fitting portion 224 that protrudes continuously outward and upward from the outer edge of the lid body flange portion 223 for internal and external fitting with the container body 201, a lid body outer end portion 225 extending continuously outward from the lower edge of the lid body fitting portion 224, and a knob piece (not shown and not numbered).

[0089] The packaging container shown in this embodiment is not limited to the above-mentioned contents, and includes the positions, shapes, and dimensions of all parts and the relationships between parts as long as the same effects can be obtained. [Explanation of symbols]

[0090] First Embodiment 1 Container body 11 Bottom part 12 Main body side wall 13 Body corner 13a Body corner part 13b: Corner edge of main body; 13bо: Outer peripheral edge of corner edge; 13bi: Inner peripheral edge of corner edge

[0091] <Second embodiment> 1 Container body 11 Bottom part 12 Main body side wall 12a Base 13 Main body fitting part 2 Lid 2a Cover part, 2b Lid flange part 21 Top section 22 Lid side wall 23 Extension 23a flange reinforcement portion, 23b circumferential rib portion, 23c flat portion 24 Lid fitting portion 24a Lid fitting end

[0092] <Third embodiment> 1, 101, 201 container body, 1a, 101a, 201a storage section 11 Bottom part 12 Main body side wall 13,113,213 Main body fitting part 14,114,214 outer wall portion of main body, 14a inner end portion of outer wall of main body, 14b outer end portion of outer wall of main body 15 overlapping piece, 15a base end piece, 15b folded piece, 15c hinge, 15d, 15f fixing portion, 15e breaking portion, 15bt folded tip piece 116(116a, 116b), 216 Body flange 2 Lid body, 2a, 102a, 202a Cover part 21 Top section 22 Lid side wall 23,123,223 Lid flange 24,124,224 Lid fitting part 25,125,225 Lid outer end 26 knob piece, 26a, 26b tongue pieces

Claims

1. The container comprises a container body for accommodating contents, and a lid body attached to the container body while being surrounded by the container body; The lid body includes a cover portion that covers the container body and a flange portion formed around the periphery of the cover portion, The flange portion has an extension portion that extends outward from the edge of the cover portion and a lid body erection portion that stands upward from the edge of the extension portion, The extension portion is formed with a flange reinforcing portion that protrudes in a bridge-like manner from the cover portion side to the lid body erection portion side. A packaging container characterized by:

2. the extension portion is formed continuously with the edge of the cover portion and has a circumferential rib portion that goes around the flange portion, and a flat portion that is formed continuously with the circumferential rib portion and has a height difference with the circumferential rib portion; The flange reinforcement portion is connected to the peripheral rib portion relative to the flat portion.

2. The packaging container according to claim 1.

3. The lid upright portion has a narrow, horizontal lid upright end portion corresponding to the outermost end of the lid.

3. The packaging container according to claim 1 or 2.

4. The container body has a bottom surface, a side wall portion rising upward from an edge of the bottom surface, and a main body standing portion rising upward from an upper end of the side wall portion, The side wall portion has a base portion formed to be recessed inward from near the upper end, The flange reinforcing portion is formed at a position opposite to the base portion.

4. The packaging container according to claim 1.

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