JP2021123392A - Packaging container - Google Patents

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

The present invention relates to a packaging container that can be easily stacked when displayed.

At retail stores such as convenience stores, it is common to see bento boxes and other items stored in plastic containers and displayed in layers. If stacked, the upper container may fall off, so containers that have been devised to prevent it from slipping have been developed.

For example, in Patent Document 1 below, a container body and a lid are provided, and a recess for receiving a convex portion formed on the bottom surface of the container body is formed on the top surface of the lid, and the convex portion of the container body is formed. In a packaging container that can be stacked in multiple stages so as to enter the recess of the lid, the lid is transparent, the recess of the lid is a flat surface, and the recess of the lid projects into the lid on the periphery of the recess of the lid. A bent portion made of ridges is formed, and the bent portion includes an outer wall portion located on the outer side of the ridges, and the outer wall portion is a state in which the containers are stacked in multiple stages of the upper container. A packaging container is disclosed, characterized in that the upper container in the state is prevented from laterally shifting with respect to the lower container by abutting the convex portions. This container also has the effect that the lid is not easily crushed even if it is stacked and displayed in multiple stages.

Japanese Patent No. 5254707

The container disclosed in Patent Document 1 is devised so that the container placed on the upper stage does not shift laterally, but a bent portion is formed in order to prevent the lid from being crushed, and this bent portion is formed in the above-mentioned Patent Document. As shown in FIG. 3 and the like of No. 1, since it is formed in a concave shape recessed from the upper surface side, there is a risk that dust or the like may collect inside. Even if an attempt is made to remove dust or the like accumulated from this bent portion, it may enter the inside and be difficult to remove, which may cause a problem in terms of hygiene.

Therefore, an object of the present invention is to provide a packaging container provided with a lid having a rigidity that makes it difficult for dust and the like to collect on the upper surface of the lid and that the lid is hard to be crushed even when stacked.

One form of the packaging container of the present invention is a packaging container that can be stacked in a state where the container body is covered with a lid, and the lid is a flat surface on which the bottom surface of the container body can be placed. It is provided with a top surface portion and a raised portion that raises a part or all of the peripheral edge of the top surface portion to prevent the container body on which the container is placed from being displaced. The inner surface portion is an inclined surface having a smooth surface rising from the top surface portion, and the surface of all or part of the top surface portion and the outer surface portion extends in the inner and outer directions of the lid body. It is characterized by having a concavo-convex surface in which a plurality of elongated concave grooves or elongated ridges are arranged in parallel.

The packaging container of the above-described form not only prevents the container placed on the upper stage from slipping due to the provision of the raised portion, but also has an inner surface portion having a smooth inclined surface, so that dust and the like are less likely to collect and accumulate. Can be easily wiped off.
In addition, since the top surface and the outer surface of the raised portion are provided with an uneven surface composed of an elongated concave groove or an elongated ridge, the rigidity of the lid is increased, and the lid is less likely to be crushed even when another container is placed on the top. Since the surface portion and the outer surface portion are bellows-shaped, the lid body is appropriately deformed in the circumferential direction, and even if the upper container is displaced, the impact can be absorbed.

In the packaging container of the above-described form, it is preferable that the top surface portion has a rectangular shape in a plan view and the raised portion is provided at least in the vicinity of each corner of the peripheral edge of the top surface portion.
When the top surface portion has a rectangular shape in a plan view, by providing the raised portions at each corner portion, the bottom surface portion of the container body placed on the top surface portion is surrounded, and the placed container is less likely to shift.
Further, in a packaging container having a rectangular top surface in a plan view, it is preferable that the lid is transparent or translucent, and the uneven surface is provided only in the vicinity of each corner of the lid. Further, it is preferable to provide a flat knob portion protruding to the outside of the lid near at least one corner of the lid.
By making the lid transparent or translucent, it becomes easier to see the contents inside, but since the uneven surface hinders visibility, by providing the uneven surface only near each corner, the uneven surface You can clearly see the contents from between. Further, by providing the knob portion in the vicinity of the corner portion where the uneven surface is formed, the rigidity in the vicinity of the uneven surface is increased, so that the lid body is less likely to be deformed when opened and is easily opened.

In the packaging container of the above form, it is preferable that the outer surface portion is extended downward to form the peripheral wall portion of the lid body.
Even if the peripheral wall portion is provided in this way and the lid body has a high shape, the rigidity of the peripheral wall portion is increased by the uneven surface, and even if another container is placed on the top surface portion, it is difficult to be crushed.

In the packaging container of the above form, it is preferable that the width of the elongated groove or the elongated ridge is within the range of 0.5 mm to 3 mm.
By making the elongated concave groove or the elongated ridge narrow in this range in this way, the lid body is appropriately easily deformed in the circumferential direction, and even if the upper container is displaced, the impact can be absorbed.

In the packaging container of the above form, a middle plate is provided between the container body and the lid, the inner plate is made non-transparent, the lid is made transparent or translucent, and a flat shape protruding to the outside of the lid. It is preferable that the structure includes a knob portion, and the knob portion is arranged inside the outer edge of the inner plate in a plan view.
By doing so, even if the lid is transparent or translucent, the inner plate under the lid is non-transparent, so that the outer edge of the picked portion can be easily seen and the position of the picked portion can be easily confirmed.

In the packaging container having the above-mentioned inner plate, the inner plate includes a lower surface portion of the inner plate and a peripheral wall portion of the inner plate provided around the lower surface portion of the inner plate, and a concave groove extending from the peripheral wall portion of the middle plate to the bottom surface portion of the inner plate. It is preferable to provide a plurality of shaped flow path portions.
By doing so, the water and oil exuded from the contents of the inner plate flow through the flow path portion and easily flow to the bottom surface side of the inner plate, and the flow path portion acts like a rib in the inner plate. Can increase the strength of.

It is a perspective view which showed the packaging container of one Embodiment of this invention, and showed the state which showed the state which the lid body, the inner plate and the container body were separated. It is a side view of the packaging container of FIG. 1 in a separated state. It is a top view which showed the lid body of FIG. FIG. 3 is a partially enlarged end view showing a state in which the vicinity of the raised portion provided on the lid body of FIG. 1 is cut in the vertical direction. It is a partially enlarged perspective view which showed the vicinity of one corner part of the lid body of FIG. FIG. 3 is a partially enlarged end view showing a state in which the vicinity of the uneven surface provided on the lid body of FIG. 1 is cut in the lateral direction. It is a top view which showed the middle plate of FIG. FIG. 5 is a partially enlarged plan view showing the vicinity of one corner of the packaging container of FIG. 1 with the inner plate and the lid closed in the container body. It is a top view which showed the container body of FIG.

Hereinafter, an embodiment of the packaging container of the present invention will be described with reference to the drawings.

As shown in FIG. 1 or 2, the packaging container 1 according to the embodiment of the present invention includes a lid 2, a middle plate 3, and a container main body 4, and the inner plate 3 is fitted to the container main body 4. Further, the lid 2 is fitted to the inner plate 3 so that the inner plate 3 and the container body 4 can be covered.
In the present embodiment, the inner plate 3 is provided, but the lid 2 may be directly fitted to the container body 4 without the inner plate 3. Further, the inner plate 3 is configured to be fitted to the container main body 4, but the present invention is not limited to this, and the inner plate 3 is simply placed and fitted on the main body flange portion 43 described later of the container main body 4. The configuration may not match, and other configurations such as a mounting lid may be used as long as they are located between the container body 4 and the lid 2.
In the present embodiment, the packaging container 1 has a square shape in a plan view, but is not limited to this, and is not limited to a square shape in a plan view, a rectangular shape in a plan view such as a rhombus or a rectangle, a circular to oval shape in a plan view, a hexagon, or the like. Any shape such as a polygonal shape in a plan view such as an octagon may be used.

The packaging container 1 can contain, for example, foodstuffs and the like as inclusions. The food is not particularly limited, but bowls such as bowls, oyakodon, and tendon, and noodles such as udon and ramen are preferable. The dish 3 can contain ingredients made of cutlet bound with eggs. When udon is stored, ingredients such as udon noodles can be stored in the container body 4 and shrimp tempura can be stored in the middle plate 3.

The lid body 2, the inner plate 3, and the container body 4 are not particularly limited, but can be manufactured by thermoforming a synthetic resin sheet. The synthetic resin sheet may be either a non-foamed resin sheet or a foamed resin sheet, but the lid 2 and the inner plate 3 are preferably a synthetic resin sheet, and the container body 4 is preferably 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 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 in the range of 0.5 mm to 2.5 mm. Further, in the case of a foamed resin sheet, the foaming ratio is preferably 1.05 times to 20.0 times, particularly 1.5 times to 15.0 times.

Examples of the non-foamed resin sheet include polyolefin resin sheets such as polyethylene resin sheets and polypropylene resin sheets, polystyrene resin sheets, polyethylene terephthalate resin sheets, and polyesters such as modified polyethylene terephthalate resin sheets imparted with heat resistance. A thermoplastic resin sheet such as a based resin sheet can be used. Further, a material that can withstand the heating of a microwave oven, for example, a heat-resistant polystyrene-based resin sheet, a polypropylene-based resin sheet, or a modified polyethylene terephthalate-based resin sheet imparted with heat resistance may be used.

As the foamed resin sheet, for example, a foamed polyester resin sheet such as a foamed polyolefin resin sheet, a foamed polystyrene resin sheet, or a foamed polyethylene terephthalate can be used.
A laminated sheet in which synthetic resin sheets are laminated can also be used, and examples of the laminated sheet include a non-foamed resin sheet or a laminated sheet in which a resin film is heat-laminated on a foamed resin sheet, a laminated sheet by a coextrusion method, and an extrusion lamination method. Laminated sheets and the like can be mentioned.

Examples of thermoforming include vacuum forming, compressed air forming, vacuum compressed air forming, and hot plate forming.
The lid 2, the inner plate 3, and the container body 4 may be colored such as black or white, but are preferably transparent or translucent so that the inside can be visually recognized. In particular, the lid 3 is transparent or translucent. Preferably, the inner plate 3 is non-transparent such as black. Further, the surfaces of the lid body 2, the inner plate 3 and the container body 4 may be printed or engraved with characters, patterns, etc., and ribs for reinforcement and grain processing for slip prevention may be provided. May be good.

As shown in FIGS. 1 to 3, the lid 2 is internally fitted into the middle plate 3 so that it can be covered.
The lid 2 has a flat top surface portion 21, a raised portion 24 provided on the peripheral edge portion thereof, an inclined surface-shaped peripheral wall portion 22 inclined downward from the peripheral edge portion of the top surface portion 21, and a lower edge of the peripheral wall portion 22. It is provided with a fitted portion 23 that is folded upward so that the portion can be fitted to the middle plate 3.

The top surface portion 21 is formed as a substantially horizontal plane having a square shape with rounded corners in a plan view, and the bottom surface portion 41 of the main body of the container main body 4 can be placed on the upper surface thereof. A raised portion 24 that is raised upward is provided on the peripheral edge portion of the top surface portion 21. By providing the raised portion 24, it is possible to surround the main body bottom surface portion 41 of the container main body 4 placed on the top surface portion 21 and prevent the upper container 1 from laterally shifting when stacked.

In the present embodiment, the raised portion 24 is provided on two opposite sides as shown in FIG. 3, and is formed in an arc or a curved shape in a cross-sectional view as shown in FIG. The raised portion 24 may be provided on all or part of the peripheral edge of the top surface portion 21, and may be provided over the entire peripheral edge of the top surface portion 21, or may be provided only near each corner of the lid 2. , It is preferable to provide the container 1 at least near each corner from the viewpoint of preventing the container 1 from being displaced.

As shown in FIG. 4 or 5, the raised portion 24 has 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 located outside the lid body 2. It is composed of a part 24c.
The inner surface portion 24a is continuous so as to gradually rise from the top surface portion 21, and is formed as a smooth inclined surface without unevenness. The inclined surface can be an inclined plane, a curved concave surface, or the like. The term "smoothness" as used herein is not particularly limited, but the arithmetic mean roughness (Ra) is 100 μm or less.

As shown in FIGS. 5 or 6, the top surface portion 24b and the outer surface portion 24c are formed as an uneven surface 26 in which a plurality of elongated ridges 25 extending in the inward and outward directions of the lid 2 are arranged in parallel. In the present embodiment, the elongated ridge 25 is provided, but an elongated concave groove may be provided to form the uneven surface 26.
As shown in FIG. 6, the elongated ridge 25 preferably has a width W of 0.5 mm to 3 mm, particularly preferably 1 mm to 2.5 mm. Further, it is preferable that the height H is in the range of 10 μm to 1 mm, particularly in the range of 200 μm to 800 μm. The distance 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 do not clearly appear, but it is preferably near the inflection point in the cross section.

The uneven surface 26 may be provided on all or a part of the portion where the raised portion 24 is provided, and is preferably provided near each corner of the lid 2. When the lid 2 is made transparent or translucent, if the concave-convex surface 26 is provided, the visibility of the internal contents is hindered. Therefore, it is preferable to provide the concave-convex surface 26 on a part of the portion where the raised portion 24 is provided.

As shown in FIG. 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 the outer surface portion 24c downward. Although the peripheral wall portion 22 is an inclined surface in this embodiment, it may be a convex curved surface or a hanging surface.
A part or all of the peripheral wall portion 22 is an uneven surface 26 connected to an elongated ridge 25 provided on the top surface portion 24b and the outer surface portion 24c. By providing the uneven surface 26 on the top surface portion 24b, the outer surface portion 24c, and the peripheral wall portion 22, it is possible to increase the strength and prevent the containers 1 from being crushed when stacked.
The heights of the peripheral wall portion 22 and the raised portion 24 (the vertical length from the lower edge portion of the peripheral wall portion 22 to the top of the raised portion 24) are not particularly limited, but are 10 mm to 60 mm, particularly 20 mm to 50 mm. Is preferable.

As shown in FIG. 1 or 2, the fitted portion 23 is formed by folding back the lower edge portion of the peripheral wall portion 22, and has an inverted tapered outer surface thereof so that it can be internally fitted to the inner plate 3. It is set to.

A flange portion 27 is provided on the upper edge portion of the fitted portion 23 so as to project slightly outward, and a flat knob portion 28 protruding outward from the lid body 2 is provided at each corner of the lid body 2. It is provided.
As shown in FIG. 3, the knob portion 28 has a shape in which two peaks are connected in a plan view, and the root thereof is a curved concave recess 29 that is slightly scooped out inside the lid. By providing the curved recess 29, it is possible to prevent stress from concentrating in the vicinity of the curved recess 29 when the knob 28 is picked and opened, and it is possible to prevent the lid 2 from breaking.

As shown in FIGS. 1, 2 or 7, the inner plate 3 is formed in a shallow-bottomed square bowl shape and is externally fitted to the container body 4 so that the container body 4 can be covered.
The middle plate 3 has a square-shaped inner plate bottom surface 31 in a plan view, a middle plate peripheral wall portion 32 surrounding the inner plate peripheral portion 32, and an inner plate extending stepwise from the upper edge portion of the inner plate peripheral wall portion 32 to the outer side of the inner plate. It is provided with a flange portion 33.

A storage portion 31a formed in a moat shape by being recessed one step is provided around the bottom surface portion 31 of the middle plate so that oil and water exuded from the contained contents can be stored.
As shown in FIG. 7, a linear convex portion 31b having a dogleg shape is formed at an appropriate position on the surface of the bottom surface portion 31 of the inner plate, and the contained content is placed on the linear convex portion 31b. , It is difficult to touch the exuded oil and water. The linear convex portions 31b are provided with crossing cut-out portions 31c at intervals so that oil and water exuded from the contained matter can easily flow without accumulating on the bottom surface portion 31 of the inner plate.

The inner plate peripheral wall portion 32 is formed as a vertical surface or an inclined surface that rises from the peripheral edge of the inner plate bottom surface portion 31, and the fitted portion 23 of the lid 2 is used as a fitting portion 32a having an inverted tapered shape on the upper side thereof. It is designed so that it can be fitted.
On the surface of the inner plate peripheral wall portion 32, a plurality of concave groove-shaped flow path portions 32b extending from the inner plate peripheral wall portion 32 to the inner plate bottom surface portion 31 are provided, and oil and water exuded from the contained matter are removed from the inner plate bottom surface portion. It is designed to flow to the 31 side. The end of the flow path portion 32b is provided in the storage portion 31a so that oil and water can be easily stored in the storage portion 31a.

The middle plate flange portion 33 is formed so as to spread stepwise from the upper edge portion of the middle plate peripheral wall portion 32 toward the outside of the middle plate, and a protrusion portion protruding inward of the container is provided on the outermost hanging lower surface 33a. It is designed so that it can be externally fitted to the container body 4.
Near the pair of corners of the middle plate flange portion 33, a knob portion 33b extending outward in the shape of a tongue piece is formed.
In the vicinity of the other pair of corners of the middle plate flange portion 33, an inclined surface-shaped inclined surface portion 33c that descends from the vicinity of the upper edge portion of the middle plate peripheral wall portion 32 toward the hanging lower surface 33a is formed. By providing the inclined surface portion 33c, it is possible to make the middle plate 3 less likely to bend when the middle plate 3 is lifted.

When the lid 2 is fitted to the middle plate 3, as shown in FIG. 8, the outer edge of the grip portion 28 of the lid 2 is formed so as to be inside the outer edge of the middle plate 3 in a plan view. Is preferable. By doing so, for example, when the lid 2 is made transparent or translucent, if the inner plate 3 is made non-transparent such as black, the outer edge can be visually recognized even if the knob 28 is transparent or translucent. It will be easier and easier to open.

As shown in FIGS. 1, 2 or 9, the container body 4 has a deep-bottomed square bowl shape, and has a square-shaped bottom surface portion 41 having a rounded corner in a plan view and an inclination while spreading outward from the peripheral portion thereof. It is provided with a main body peripheral wall portion 42 that rises in a planar shape.
It is preferable that the bottom surface portion 41 of the main body has a size that fits inside the raised portion 24 and has a size that fits substantially without a gap.

A flat main body flange portion 43 projecting to the outside of the main body is provided on the upper edge portion of the main body peripheral wall portion 42 over the entire circumference. The outer edge end of the main body flange portion 43 is housed inside the hanging lower surface 33a of the inner plate 3, and the protrusion is locked so that the inner plate 3 can be externally fitted to the container main body 4.

In the packaging container 1, for example, rice is stored in the container body 4, the middle plate 3 is fitted and covered on the container body 4, the middle plate 3 is filled with ingredients such as tempura, and then the middle plate 3 is filled. The lid 2 can be fitted and used. By placing the bottom surface portion 41 of the container body 4 of the other packaging container 1 on the top surface portion 21 of the lid body 2 of the packaging container 1, the stacking can be performed.

Since the packaging container 1 is provided with the raised portion 24, it is possible to prevent the container body 4 of the other packaging container 1 placed on the top surface portion 21 from being surrounded by the raised portion 24 and being displaced. Since the inner surface portion 24a of the raised portion 24 is a smooth surface, dust and the like are less likely to collect and can be easily wiped off. Further, since the top surface portion 24b, the outer surface portion 24c, and the peripheral wall portion 22 of the raised portion 24 are provided as the uneven surface 26, the rigidity of the lid 2 is increased, and even if another container 1 is placed on the lid, it is difficult to be crushed and the uneven surface 26 is formed. Since the container 1 has a bellows shape, it is appropriately deformed in the circumferential direction of the lid, and even if the placed container 1 shifts, it can absorb the impact, and the stacked state is less likely to collapse.
Further, in the stacked state, dirt adhering to the bottom surface portion 41 of the main body to be placed is suppressed from adhering to the inner surface portion 24a of the top surface portion 21 and the raised portion 24, and even if the dirt adheres, it can be easily wiped. Can be taken.

In the packaging container 1, the top surface portion 21 of the lid 2 has a rectangular shape in a plan view, and the raised portion 24 is provided at least near each corner of the peripheral edge of the top surface portion 21, so that the top surface portion 21 is placed on the top surface portion 21 for other packaging. The container 1 is less likely to shift. In the packaging container 1 having a rectangular shape in a plan view, the lid 2 is transparent or translucent, and the concave-convex surface 26 is provided only in the vicinity of each corner of the lid 2. You can see it clearly. By providing the knob portion 28 in the vicinity of the corner portion where the uneven surface 26 is formed, the rigidity in the vicinity of the uneven surface 26 is increased, so that the lid 2 is less likely to be deformed when opened and is easily opened.

The packaging container 1 is a container in which the lid is appropriately deformed in the circumferential direction by setting the width of the elongated ridge 25 (or the elongated concave groove) within the range of 0.5 mm to 3 mm, and the container 1 is placed on the top surface portion 21. Even if 1 shifts, the impact can be absorbed.

The packaging container 1 has a structure in which an inner plate 3 is provided between the lid 2 and the container body 4, and the lid 2 is provided with a knob 28, and the knob 28 is from the outer edge of the inner plate 3 in a plan view. By arranging the inside, the lid 2 is made transparent or translucent, and the inner plate 3 is made non-transparent, so that the outer edge of the knob 28 can be easily seen and the position of the knob 28 can be easily confirmed. ..

The middle plate 3 is provided with a flow path portion 32b that connects the inner plate peripheral wall portion 32 to the middle plate bottom surface portion 31, so that water and oil exuded from the contained matter can easily flow to the middle plate bottom surface portion 31 side in the storage portion 31a. It becomes easy to store, and the flow path portion 32b acts like a rib to increase the strength of the inner plate 3.

The configuration of the above embodiment is not mentioned as limiting the present invention, and can be changed as long as the technical object is common, and the present invention includes such a change.

1 Packaging container 2 Lid 21 Top surface 22 Peripheral wall 23 Fitted part 24 Raised part 24a Inner surface part 24b Top surface part 24c Outer surface part 25 Elongated ridge 26 Concavo-convex surface 27 Flange part 28 Grip part 29 Curved recess 3 Middle plate 31 Middle plate bottom surface 31a Storage part 31b Linear convex part 31c Cut-through part 32 Middle plate peripheral wall part 32a Fitting part 32b Flow path part 33 Middle plate flange part 33a Hanging bottom surface 33b Picking part 33c Inclined surface part 4 Container body 41 Main body bottom part 42 Main body peripheral wall 43 Main body flange

Claims (8)

A packaging container that can be stacked with the container body covered with a lid.
The lid has a flat top surface on which the bottom surface of the container body can be placed and a raised portion that raises a part or all of the peripheral edge of the top surface to prevent the container body on which the container body is placed from being displaced. With and
The raised portion is composed of an inner surface portion inside the lid body, a top surface portion on the top side side, and an outer surface portion outside the lid body, and the inner surface portion has an inclined surface having a smooth surface rising from the top surface portion. The top surface portion and the outer surface portion are packaging containers having a concavo-convex surface in which a plurality of elongated concave grooves or elongated ridges whose surfaces extend in the inward and outward directions of the lid are arranged in parallel. The packaging container according to claim 1, wherein the top surface portion has a rectangular shape in a plan view, and the raised portion is provided at least in the vicinity of each corner of the peripheral edge of the top surface portion. The packaging container according to claim 2, wherein the lid is transparent or translucent, and the uneven surface is provided only in the vicinity of each corner of the lid. The packaging container according to claim 3, further comprising a flat knob projecting outside the lid near at least one corner of the lid. The packaging container according to any one of claims 1 to 4, wherein the outer surface portion is extended downward to form a peripheral wall portion of the lid body. The packaging container according to any one of claims 1 to 5, wherein the width of the elongated groove or the elongated ridge is within the range of 0.5 mm to 3 mm. It has a structure in which an inner plate is provided between the container body and the lid body, the inner plate is made non-transparent, the lid body is made transparent or translucent, and a flat knob portion protruding to the outside of the lid body is provided. The packaging container according to any one of claims 1 to 6, wherein the knob portion is arranged inside the outer edge of the inner plate in a plan view. The middle plate has a structure including a bottom surface portion of the middle plate and a peripheral wall portion of the middle plate provided around the bottom surface portion, and a plurality of concave groove-shaped flow path portions extending from the peripheral wall portion of the middle plate to the bottom surface portion of the middle plate are provided. The packaging container according to claim 7.

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