Packaging containers

Abstract

To provide a packaging container provided with a lid unlikely to collect dust and having rigidity enough not to be easily crushed.SOLUTION: The present invention provides a packaging container 1 that can be stacked in a state where a lid 2 is covered on a container body 4, in which the lid 2 has a flat top surface portion 21 on which a bottom surface portion 41 of the container body 4 can be placed, and a raised portion 24 formed by raising a part or all of a peripheral edge portion of the top surface portion 21 so as to prevent the container body 4 placed from being shifted. The raised portion 24 is composed of an inner surface portion 24a inside the lid body, a top surface portion 24b on a top side, and an outer surface portion 24c on an outside of the lid body, in which the inner surface portion 24a is a smooth inclined surface rising from the top surface portion 21, and the top surface portion 24b and the outer surface portion 24c are formed with a concavo-convex surface 26 having a plurality of elongated ridges 25 that protrude in inward and outward directions of the lid 2 and are arranged in parallel.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to packaging containers that can be easily stacked when displayed. [Background technology]

[0002] In convenience stores and other retailers, it is common to see lunch boxes and other foods stored in plastic containers and displayed in stacks. Because stacking containers can cause the containers on top to fall off, containers designed to prevent them from slipping have been developed.

[0003] For example, Patent Document 1 below discloses a packaging container that includes a container body and a lid, a recess formed on the top surface of the lid for receiving a protrusion formed on the bottom surface of the container body, and that can be stacked in multiple tiers so that the protrusion of the container body fits into the recess of the lid, the lid is transparent, the recess of the lid is flat, and a bent portion consisting of a protrusion that protrudes into the lid is formed around the periphery of the recess of the lid, the bent portion having an outer wall portion located on the outer side of the protrusion, and this outer wall portion abuts against the protrusion of an upper container when the containers are stacked in multiple tiers, preventing the upper container from shifting sideways relative to the lower container in this state. This container also has the effect of making the lid less likely to be crushed even when stacked in multiple tiers and displayed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5254707 Summary of the Invention [Problem to be solved by the invention]

[0005] The container disclosed in Patent Document 1 is designed to prevent the container placed on the upper level from shifting sideways, but a bent portion is formed to make the lid less likely to be crushed, and this bent portion is formed in a concave shape recessed from the top surface as shown in Figure 3 of Patent Document 1, so there is a risk of dust and the like accumulating inside. Even if you try to remove the dust and the like that has accumulated at this bent portion, it gets inside and is difficult to remove, which could cause hygiene problems.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a packaging container having a lid body that is rigid enough to prevent dust and the like from accumulating on the upper surface of the lid body and is not easily crushed even when stacked. [Means for solving the problem]

[0007] One embodiment of the packaging container of the present invention is a packaging container that can be stacked with a lid placed on a container body, and the lid has a flat top surface on which a bottom surface of the container body can be placed, and a raised portion that raises part or all of the periphery of the top surface to prevent the placed container body from shifting. The top surface portion has a rectangular shape in a plan view, and the raised portions are provided at least near each corner of the periphery of the top surface portion; The raised portion is composed of an inner surface portion inside the lid body, a top surface portion on the top side, and an outer surface portion on the outside of the lid body, and the inner surface portion has a surface that rises from the top surface portion as a smooth inclined surface, and the top surface portion and the outer surface portion have a plurality of separated elongated grooves or elongated protrusions that extend inward and outward from the lid body. The ends of the elongated grooves or elongated protrusions adjacent to each other in the circumferential direction of the top surface are directly connected to each other. It is characterized by having a bellows-like uneven surface arranged in parallel.

[0008] The packaging container of the above type not only prevents the container placed on the upper tier from shifting due to the provision of the raised portion, but also has a smooth inclined surface on the inner surface, which makes it difficult for dust to accumulate and even if it does accumulate, it can be easily wiped off. In addition, the top and outer surfaces of the raised portion are provided with an uneven surface consisting of elongated grooves or elongated protrusions, which increases the rigidity of the lid body and makes it less likely to be crushed even when other containers are placed on it.Furthermore, since the top and outer surfaces are accordion-shaped, the lid body can deform moderately in the circumferential direction, and can absorb impact even if the upper container shifts.

[0009] In the packaging container of the above embodiment, it is preferable that the top surface portion has a rectangular shape in a plan view, and that the raised portions are provided at least near each corner of the periphery of the top surface portion. When the top surface is rectangular in plan view, by providing raised portions at each corner, the bottom surface of the container body placed on the top surface is surrounded, making it difficult for the placed container to slip. In addition, in a packaging container having a top surface that is rectangular in plan view, it is preferable that the lid be transparent or translucent and that the uneven surface be provided only near each corner of the lid.Furthermore, it is preferable that the lid be provided with a flat grip portion that protrudes outward near at least one corner of the lid. Making the lid transparent or translucent makes it easier to see the contents inside, but providing an uneven surface hinders visibility, so by providing uneven surfaces only near each corner, the contents can be clearly seen through the uneven surfaces. Furthermore, by providing tabs near the corners where the uneven surfaces are formed, the rigidity near the uneven surfaces is increased, making the lid less likely to deform when opening and easier to open.

[0010] In the packaging container of the above configuration, it is preferable that the outer surface portion extends downward to form a peripheral wall portion of the lid body. By providing the peripheral wall in this way, even if the lid has a high shape, the irregular surface increases the rigidity of the peripheral wall, making it difficult for another container to be crushed even when placed on the top surface.

[0011] In the packaging container of the above configuration, the width of the elongated grooves or elongated ridges is preferably set within a range of 0.5 mm to 3 mm. By narrowing the elongated grooves or elongated ridges in this range, the lid body can be easily deformed in the circumferential direction, and shock can be absorbed even if the upper container shifts.

[0012] In the packaging container of the above form, it is preferable that the container has an inner tray between the container body and the lid, the inner tray is opaque, the lid is transparent or translucent and has a flat handle that protrudes outward from the lid, and the handle is positioned inside the outer edge of the inner tray when viewed in a plane. By doing so, even if the lid is transparent or semi-transparent, the inner plate underneath is opaque, so that the outer edge of the knob is easily visible and the position of the knob can be easily confirmed.

[0013] In the packaging container having the above-mentioned inner tray, it is preferable that the inner tray has a bottom surface portion and a peripheral wall portion surrounding the bottom surface portion, and that a plurality of groove-shaped flow paths are provided connecting the peripheral wall portion to the bottom surface portion of the inner tray. By doing this, the water and oil seeping out from the contents of the inner tray can easily flow through the flow path toward the bottom surface of the inner tray, and the flow path acts like a rib, increasing the strength of the inner tray. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a packaging container according to an embodiment of the present invention, with the lid, inner tray, and container body separated. [Figure 2] FIG. 2 is a side view of the packaging container of FIG. 1 in a separated state. [Figure 3] FIG. 2 is a plan view showing the cover of FIG. [Figure 4] 2 is a partially enlarged end view showing the vicinity of a raised portion provided on the cover of FIG. 1 cut in the vertical direction. [Figure 5] 2 is a partially enlarged perspective view showing the vicinity of one corner of the cover body of FIG. 1. FIG. [Figure 6] 2 is a partially enlarged end view showing the vicinity of the uneven surface provided on the cover of FIG. 1 cut in the horizontal direction. [Figure 7] FIG. 2 is a plan view showing the inner tray of FIG. 1. [Figure 8] 2 is a partially enlarged plan view showing the vicinity of one corner of the packaging container of FIG. 1 in a state where the inner tray and the lid are closed on the container body. [Figure 9] FIG. 2 is a plan view showing the container body of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, one embodiment of the packaging container of the present invention will be described with reference to the drawings.

[0016] As shown in Figure 1 or Figure 2, a packaging container 1 of one embodiment of the present invention comprises a lid body 2, an inner tray 3, and a container body 4, with the inner tray 3 fitted into the container body 4, and the lid body 2 further fitted into the inner tray 3 so as to cover the inner tray 3 and the container body 4. In this embodiment, the container is configured to have an inner tray 3, but the container may also be configured so that the lid 2 can be fitted directly to the container body 4 without having the inner tray 3. Also, while the inner tray 3 is configured to fit into the container body 4, this is not limiting, and the inner tray 3 may simply be placed on top of a body flange portion 43 (described later) of the container body 4 without being fitted, or may be configured like a top lid, or anything else that is positioned between the container body 4 and the lid 2. In this embodiment, the packaging container 1 has a square shape when viewed from above, but is not limited to this and may have any shape when viewed from above, such as a rectangular shape such as a diamond or rectangle, a circular or oval shape when viewed from above, or a polygonal shape such as a hexagon or octagon when viewed from above.

[0017] The packaging container 1 can accommodate, for example, food items. Food items are not particularly limited, but are preferably rice bowls such as katsudon (pork cutlet bowl), oyakodon (chicken and egg bowl), and tempura bowls, as well as noodles such as udon and ramen. For example, when accommodating katsudon (pork cutlet bowl), rice can be accommodated in the container body 4, and a topping consisting of cutlet bound with egg can be accommodated in the inner plate 3. When accommodating udon, udon noodles can be accommodated in the container body 4, and a topping such as shrimp tempura can be accommodated in the inner plate 3.

[0018] The lid 2, inner tray 3, and container body 4 can be manufactured by thermoforming a synthetic resin sheet, although there are no particular limitations on the materials used. The synthetic resin sheet may be either a non-foamed resin sheet or a foamed resin sheet, but it is preferable that the lid 2 and inner tray 3 be synthetic resin sheets, and that the container body 4 be a foamed resin sheet. In the case of a non-foamed resin sheet, it is preferable to use a sheet having a thickness in the range of 0.1 mm to 2.0 mm, particularly in the range of 0.2 mm to 1.2 mm. In the case of a foamed resin sheet, it is preferable to use a sheet having a thickness in the range of 0.3 mm to 3.0 mm, particularly 0.5 mm to 2.5 mm, and it is also preferable to use a foamed resin sheet having an expansion ratio of 1.05 to 20.0 times, particularly 1.5 to 15.0 times.

[0019] Examples of non-foamed resin sheets that can be used include thermoplastic resin sheets such as polyolefin resin sheets, such as polyethylene resin sheets and polypropylene resin sheets, and polyester resin sheets, such as polystyrene resin sheets, polyethylene terephthalate resin sheets, and heat-resistant modified polyethylene terephthalate resin sheets. Furthermore, materials that can withstand heating in a microwave oven, such as heat-resistant polystyrene resin sheets, polypropylene resin sheets, and heat-resistant modified polyethylene terephthalate resin sheets, may also be used.

[0020] Examples of foamed resin sheets that can be used include foamed polyolefin resin sheets, foamed polystyrene resin sheets, and foamed polyester resin sheets such as foamed polyethylene terephthalate. A laminated sheet obtained by laminating synthetic resin sheets can also be used. Examples of the laminated sheet include a laminated sheet obtained by thermally laminating a resin film onto a non-foamed resin sheet or a foamed resin sheet, a laminated sheet obtained by a co-extrusion method, and a laminated sheet obtained by an extrusion lamination method.

[0021] Examples of thermoforming include vacuum forming, pressure forming, vacuum pressure forming, and hot plate forming. The lid 2, inner tray 3, and container body 4 may be colored, such as black or white, but are preferably transparent or translucent so that the inside can be seen, and in particular, the lid 3 is preferably transparent or translucent, and the inner tray 3 is preferably opaque, such as black. Furthermore, the surfaces of the lid 2, inner tray 3, and container body 4 may be printed or engraved with letters, pictures, etc., or may be provided with ribs for reinforcement or textured to prevent slipping.

[0022] As shown in FIGS. 1 to 3, the lid body 2 is adapted to be fitted into the inner tray 3 to cover it. The lid body 2 comprises a flat top surface 21, a raised portion 24 provided on the peripheral edge thereof, a peripheral wall portion 22 in the form of an inclined surface that slopes downward from the peripheral edge of the top surface 21, and a fitting portion 23 that allows the lower edge of the peripheral wall portion 22 to be folded upward and fitted onto the inner tray 3.

[0023] The top surface 21 is formed as a substantially horizontal surface in the shape of a square with rounded corners in a plan view, and the main body bottom surface 41 of the container main body 4 can be placed on its upper surface. The peripheral edge of the top surface 21 is provided with a raised portion 24 that is raised upward. The raised portion 24 surrounds the main body bottom surface 41 of the container main body 4 placed on the top surface 21, and prevents the upper container 1 from shifting sideways when stacked.

[0024] In this embodiment, the raised portions 24 are provided on two opposing sides as shown in Fig. 3, and are formed in an arc or curved shape in cross section as shown in Fig. 4. The raised portions 24 may be provided on all or part of the periphery of the top surface 21. For example, the raised portions 24 may be provided along the entire periphery of the top surface 21 or only near each corner of the lid 2, and are preferably provided at least near each corner from the viewpoint of preventing the placed container 1 from shifting.

[0025] As shown in Figure 4 or Figure 5, the raised portion 24 consists of an inner surface portion 24a located inside the lid body 2, a top surface portion 24b located on the upper side (top side), and an outer surface portion 24c located outside the lid body 2. The inner surface 24a is formed as a smooth, inclined surface that gradually rises from the top surface 21 and is free of irregularities. The inclined surface can be an inclined plane or a curved concave surface. The term "smooth" as used here is not particularly limited, but refers to an arithmetic mean roughness (Ra) of 100 μm or less.

[0026] 5 or 6, the top surface portion 24b and the outer surface portion 24c have a concave-convex surface 26 formed by arranging a plurality of parallel elongated ridges 25 extending in the inward and outward directions of the lid body 2. In this embodiment, the concave-convex surface 26 is formed by providing elongated ridges 25, but the concave-convex surface 26 may also be formed by providing elongated grooves. As shown in Fig. 6, the elongated ridges 25 preferably have a width W in the range of 0.5 mm to 3 mm, particularly in the range of 1 mm to 2.5 mm. The height H is preferably in the range of 10 µm to 1 mm, particularly in the range of 200 µm to 800 µm. The spacing D between the elongated ridges 25 is not particularly limited, but is preferably 0.5 mm to 3 mm. In the raised portion 24, the boundary between the inner surface portion 24a and the top surface portion 24b and the boundary between the top surface portion 24b and the outer surface portion 24c are not clearly defined, but are preferably located near the inflection points in the cross section.

[0027] The uneven surface 26 may be provided on the entire area where the raised portion 24 is provided, or on a portion thereof, and is preferably provided near each corner of the lid 2. If the lid 2 is made transparent or translucent, providing the uneven surface 26 will hinder the visibility of the contents inside, so it is preferable to provide the uneven surface 26 on a portion of the area where the raised portion 24 is provided.

[0028] 4, the peripheral wall portion 22 is formed as an inclined surface that is flush with the outer surface portion 24c so as to extend downward from the outer surface portion 24c. In this embodiment, the peripheral wall portion 22 is an inclined surface, but it may also be a convex curved surface or a downwardly extending surface. Part or all of the peripheral wall 22 is made into an uneven surface 26 that continues to the elongated protrusions 25 provided on the top surface 24b and outer surface 24c. By providing the uneven surfaces 26 on the top surface 24b, outer surface 24c and peripheral wall 22, the strength can be increased, making it less likely for the container 1 to be crushed when stacked. The height of the peripheral wall 22 and the raised portion 24 (the vertical length from the lower edge of the peripheral wall 22 to the top of the raised portion 24) is not particularly limited, but is preferably 10 mm to 60 mm, and particularly preferably 20 mm to 50 mm.

[0029] As shown in FIG. 1 or 2, the fitted portion 23 is formed by folding back the lower edge of the peripheral wall portion 22, and its outer surface is reverse tapered so that it can be fitted into the inner tray 3.

[0030] The upper edge of the fitted portion 23 is provided with a flange portion 27 that projects outward by a small width, and each corner of the lid 2 is provided with a flat knob portion 28 that projects outward from the lid. 3, in a plan view, the gripping portion 28 has a shape of two connected peaks, the base of which forms a curved recess 29 that is slightly recessed into the inside of the lid body. By providing the curved recess 29, stress can be prevented from concentrating near the curved recess 29 when gripping the gripping portion 28 to open the lid body 2, and the lid body 2 can be prevented from breaking.

[0031] As shown in FIG. 1, FIG. 2 or FIG. 7, the inner plate 3 is formed in a shallow rectangular bowl shape and is fitted onto the outside of the container body 4 so as to cover the container body 4. The inner plate 3 comprises an inner plate bottom surface portion 31 which is a square shape with rounded corners when viewed from above, an inner plate peripheral wall portion 32 which surrounds the bottom surface, and an inner plate flange portion 33 which extends in a stepped manner from the upper edge of the inner plate peripheral wall portion 32 to the outside of the inner plate.

[0032] A reservoir 31a is provided around the bottom surface 31 of the inner tray, which is recessed and formed like a moat, so that oil and water oozing out from the stored contents can be stored. 7, linear protrusions 31b that are V-shaped in plan view are formed at appropriate positions on the surface of the inner tray bottom surface 31, so that the contents placed on these are less likely to come into contact with oozing oil and moisture. Linear protrusions 31b have cutouts 31c that run across them at intervals, so that oil and moisture oozing from the contents can easily flow away without accumulating on the inner tray bottom surface 31.

[0033] The inner tray peripheral wall portion 32 is formed as a vertical or inclined surface rising from the periphery of the inner tray bottom surface portion 31, and its upper side is inverted tapered to form a mating portion 32a so that the mating portion 23 of the lid body 2 can be fitted into it. The surface of the inner tray peripheral wall 32 is provided with a plurality of groove-like flow paths 32b that extend from the inner tray peripheral wall 32 to the inner tray bottom surface 31, allowing oil and moisture that seeps out from the contents to flow toward the inner tray bottom surface 31. The ends of the flow paths 32b are provided within the storage portion 31a, making it easy for the oil and moisture to accumulate in the storage portion 31a.

[0034] The inner dish flange portion 33 is formed so as to expand in a stepped manner from the upper edge of the inner dish peripheral wall portion 32 toward the outside of the inner dish, and a protrusion that protrudes toward the inside of the container is provided on the outermost hanging surface 33a so that it can be externally fitted onto the container body 4. Near a pair of corners of the inner plate flange portion 33, there are formed knob portions 33b that extend outward like tongue pieces. Near the other pair of corners of the inner tray flange portion 33, there are formed inclined surface portions 33c that slope downward from near the upper edge of the inner tray peripheral wall portion 32 toward the hanging surface 33a. By providing the inclined surface portions 33c, it is possible to make the inner tray 3 less likely to bend when lifted.

[0035] 8, when the lid 2 is fitted onto the inner tray 3, the outer edge of the knob 28 of the lid 2 is preferably formed so as to be more inward than the outer edge of the inner tray 3 in a plan view. By doing so, for example, if the lid 2 is transparent or translucent and the inner tray 3 is opaque, such as black, the outer edge becomes easier to see even if the knob 28 is transparent or translucent, making the opening operation easier.

[0036] As shown in Figures 1, 2 or 9, the container body 4 is in the shape of a deep, rectangular bowl, and includes a body bottom surface 41 that is square with rounded corners when viewed from above, and a body peripheral wall 42 that rises in an inclined plane while widening from the peripheral edge of the body outward. The main body bottom portion 41 is preferably sized to fit inside the raised portion 24 with almost no gaps.

[0037] A flat body flange 43 that projects outward from the body is provided around the entire periphery of the upper edge of the body peripheral wall 42. The outer edge of the body flange 43 fits inside the hanging surface 33a of the inner tray 3, and the protrusions engage, allowing the inner tray 3 to fit externally onto the container body 4.

[0038] Packaging container 1 can be used, for example, by placing rice in container body 4, fitting inner plate 3 onto container body 4 to cover it, placing ingredients such as tempura on inner plate 3, and then fitting lid 2 onto inner plate 3. By placing the body bottom portion 41 of container body 4 of another packaging container 1 on top surface portion 21 of lid 2 of this packaging container 1, the two can be stacked.

[0039] Because the packaging container 1 is provided with a raised portion 24, the container body 4 of another packaging container 1 placed on the top surface 21 is surrounded by the raised portion 24, preventing it from shifting. Because the inner surface 24a of the raised portion 24 is smooth, dust and the like do not easily accumulate, and even if they do, they can be easily wiped off. In addition, because the top surface 24b, outer surface 24c, and peripheral wall 22 of the raised portion 24 are uneven surfaces 26, the rigidity of the lid body 2 is increased, making it less likely to be crushed when another container 1 is placed on it. Furthermore, because the uneven surface 26 is bellows-shaped, it deforms appropriately in the circumferential direction of the lid body, absorbing impact even if the placed container 1 shifts, and making it less likely to collapse in a stacked state. Furthermore, when stacked, dirt adhering to the bottom surface 41 of the main body on which it is placed is prevented from adhering to the top surface 21 or the inner surface 24a of the raised portion 24, and even if dirt does adhere, it can be easily wiped off.

[0040] In the packaging container 1, the top surface 21 of the lid 2 is rectangular in plan view, and raised portions 24 are provided near at least each corner of the periphery of the top surface 21, making it difficult for other packaging containers 1 placed on the top surface 21 to slip off. In the packaging container 1 that is rectangular in plan view, the lid 2 is transparent or translucent, and uneven surfaces 26 are provided only near each corner of the lid 2, allowing the contents inside to be clearly seen through the uneven surfaces 26. By providing the tabs 28 near the corners where the uneven surfaces 26 are formed, the rigidity of the area near the uneven surfaces 26 is increased, making it easier to open the lid 2 without it deforming easily when opened.

[0041] By setting the width of the elongated protrusions 25 (or elongated grooves) in the range of 0.5 mm to 3 mm, the packaging container 1 allows the lid body to deform appropriately in the circumferential direction, and can absorb impact even if the container 1 placed on the top surface 21 shifts.

[0042] The packaging container 1 is configured to have an inner plate 3 between the lid body 2 and the container body 4, and the lid body 2 is provided with a handle 28. When viewed in a plane, the handle 28 is positioned inside the outer edge of the inner plate 3, and by making the lid body 2 transparent or translucent and the inner plate 3 opaque, the outer edge of the handle 28 becomes easier to see, making it easier to confirm the position of the handle 28.

[0043] The inner tray 3 is provided with a flow path section 32b that connects the inner tray peripheral wall section 32 to the inner tray bottom surface section 31, which makes it easier for moisture and oil that seeps out from the contents to flow toward the inner tray bottom surface section 31 and accumulate in the storage section 31a, and the flow path section 32b also acts like a rib, increasing the strength of the inner tray 3.

[0044] The configurations of the above-described embodiments are not intended to limit the present invention, and modifications are possible as long as the technical purpose is the same, and the present invention includes such modifications. [Explanation of symbols]

[0045] 1 packaging container 2 lids 21Top section 22 peripheral wall section 23 mating part 24 ridges 24a inner surface 24b top part 24c external part 25 long slender protrusions 26 uneven surface 27 flange 28 knob 29 curved recess 3 medium plates 31Bottom part of medium plate 31a storage section 31b Linear convex portion 31c cut-through section 32 Middle plate peripheral wall 32a fitting part 32b flow path section 33 Center plate flange 33a hanging surface 33b knob 33c slope section 4 Container body 41 Bottom of the main body 42 Main body peripheral wall 43 Main body flange

Claims

1. A packaging container that can be stacked with a lid body placed on the container body, The lid body has a flat top surface on which the bottom surface of the container body can be placed, and a raised portion that raises part or all of the periphery of the top surface to prevent the placed container body from shifting, The top surface portion has a rectangular shape in a plan view, and the raised portions are provided at least near each corner of the periphery of the top surface portion, The raised portion comprises an inner surface inside the lid body, a top surface on the top side, and an outer surface on the outside of the lid body, the inner surface having a smoothly inclined surface rising from the top surface portion, and the top surface portion and the outer surface portion have a surface formed by separating a plurality of elongated grooves or elongated ridges extending inward and outward from the lid body, and the ends of the elongated grooves or elongated ridges adjacent in the circumferential direction of the top surface portion are directly connected and aligned in parallel to form a bellows-like uneven surface for a packaging container.

2. 2. The packaging container according to claim 1, wherein the lid is transparent or semi-transparent, and the uneven surface is provided only near each corner of the lid.

3. 3. The packaging container according to claim 1, further comprising a flat tab projecting outward from at least one corner of the lid.

4. 4. The packaging container according to claim 1, wherein the outer surface portion extends downward to form a peripheral wall portion of the lid body.

5. 5. The packaging container according to claim 1, wherein the width of the elongated grooves or the elongated ridges is within a range of 0.5 mm to 3 mm.

6. 6. A packaging container according to any one of claims 1 to 5, wherein an inner tray is provided between the container body and the lid, the inner tray is opaque, the lid is transparent or translucent and has a flat gripping portion that protrudes outward from the lid, and the gripping portion is positioned inward from the outer edge of the inner tray in a planar view.

7. The packaging container according to claim 6, wherein the inner tray is configured to have an inner tray bottom surface portion and an inner tray peripheral wall portion formed around the inner tray bottom surface portion, and a plurality of groove-shaped flow paths are provided connecting the inner tray peripheral wall portion to the inner tray bottom surface portion.

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