JP6713625B2 - Packaging container - Google Patents

Description

The present invention mainly relates to a packaging container that can store foods and the like and is made of a synthetic resin sheet.

It is often found that food products such as bento, salads, prepared foods, and fruits are enclosed in a packaging container formed of a thin synthetic resin sheet and displayed at a store such as a retail store.
In some of such packaging containers, leg portions are provided so that the bottom portion is located at a high position in order to make it easier to see the enclosed foodstuffs and the like. However, when the container is molded, the sheet of the leg portion may be stretched, the thickness of the leg portion may be thinner than the other portions, and the strength may be weakened.
Therefore, for example, increasing the sheet thickness or providing a thread tail-shaped convex portion on the outer periphery of the foot portion as shown in Patent Document 1 below is performed.

In addition, such packaging containers are often stacked in multiple stages and displayed in stores. However, if the packaging container is provided with legs, when the food product is stored, the weight of the food product bends so that the vicinity of the center of the bottom part is recessed and placed on the upper side of other packaging containers. At that time, the bottom part was in a state of being in point contact with the top surface part of the lid body of another packaging container, which sometimes became unstable.

Therefore, for example, as shown in Patent Document 2 below, a polygonal container main body formed from a thermoplastic synthetic resin sheet and a transparent lid detachably attached to the peripheral portion of the container main body are provided. At least each corner of the container body is provided with vertically bent leg portions each having a horizontal cross-section, and the lid body has a substantially flat polygonal top plate portion and a side wall continuous with a peripheral end portion of the top plate portion. And a corner portion where the top plate portion and the side wall portion intersect, and a corner portion where the side wall portion is adjacent to each other are continuously provided by arcs, and the inside of each leg portion of the container body. The side surface is characterized in that it is formed in such a shape that the side wall portion fits when the container main body is stacked on the lid body, the food inside can be easily seen, and it shifts when stacked and displayed. Food packaging containers have been developed that make them difficult and difficult to deform.

JP 2008-290728 A JP, 2004-155466, A

Recently, it has been desired to reduce the sheet thickness from the viewpoint of resource saving, and increasing the sheet thickness in order to improve the strength of the legs is against the trend, and it is not necessary to increase the sheet thickness to increase the leg thickness. Development to improve strength is being promoted in the industry.
In addition, the ability to stack the packaging containers in a stable manner is easy to use, not only when the containers are displayed, but also when they are transported.

Therefore, an object of the present invention is to provide a packaging container that can be stably stacked while reinforcing the legs.

A packaging container according to an embodiment of the present invention is a packaging container made of a synthetic resin sheet and provided with a container body and a lid, and the container body has a concave shape that bulges downward from a bottom surface portion of the container body. It has a leg portion, and the bottom surface of the leg portion has a stepped structure having at least a first surface portion and a second surface portion, and the first surface portion is located inside the container and placed on the top surface portion of the lid. Yes, the second surface part is located outside the container and is lower than the first surface part, and the side surface part between the first surface part and the second surface part places the container body on the upper side of the lid body. When placed, it has a shape that conforms to the side wall surface of the lid, and a protrusion that extends the entire length in the vertical direction and swells inside the container on the side surface between the bottom surface of the container body and the first surface of the leg. characterized by comprising.

With such a structure, the leg portion is reinforced because it has a stepped structure, and the rigidity is high even when it is manufactured by thermoforming. Further, since the first surface portion is placed on the top surface portion of the lid body and the second surface portion is shaped to be along the side wall surface portion of the lid body, it can be stably placed on the lid body and is not likely to collapse even when stacked. Become.

The packaging container of the above aspect may include a protrusion that extends in the vertical direction and bulges inward of the container on the inner side surface between the bottom surface of the container body and the first surface of the leg. The protrusion preferably has a maximum protrusion width (projection width of the protrusion/minimum width of the first surface) of 0.1 to 2.0 with respect to the minimum width of the first surface portion, in a cross section. It is preferably triangular or curved.
With this structure, the strength of the legs is increased, and the containers can be stably supported even when stacked.

In the packaging container of the above-described form, the lid can be made transparent or translucent, and the legs can be provided in the circumferential direction at appropriate intervals.

With such a configuration, when the packaging containers are stacked, the inside of the packaging container arranged below the gap between the legs can be visually recognized, and the stored items can be easily confirmed even in the stacked state.

It is a perspective view showing one embodiment of a packaging container of the present invention. It is an expansion perspective view near the leg part of the container main body of the packaging container shown in FIG. It is an expanded sectional view which cut|disconnected the leg part of the container main body of the packaging container shown in FIG. 1 in the horizontal direction. It is the side view which showed the state which piled up the packaging container shown in FIG. It is sectional drawing which cut|disconnected the leg part in the horizontal direction in the state which piled up the packaging container shown in FIG.

Hereinafter, one embodiment of the packaging container of the present invention is described based on a drawing.

As shown in FIG. 1, a packaging container 1 according to an embodiment of the present invention includes a container body 2 and a lid body 3, and the lid body 3 is fitted to the container body 2 from above and can be covered. There is.

The packaging container 1 is suitable for packaging food items such as sushi, side dishes, salads, fruits, etc., although not particularly limited thereto.
In the present embodiment, the packaging container 1 has a horizontally long rectangular shape in plan view, but the present invention is not limited to this. For example, a square or rectangular shape in plan view, a circular or oval shape in plan view, or a hexagonal shape in plan view. Alternatively, it may have a polygonal shape in plan view such as an octagonal shape.
When the packaging container 1 has a rectangular shape in a plan view, for example, the ratio of width, length, and height is set to 1.3 to 3.5 for the width 1 and 0.3 to 1.5 for the height. Preferably.

The container body 2 or the lid 3 can be manufactured by thermoforming a synthetic resin sheet having a sheet thickness of 0.1 mm to 3 mm, preferably 0.2 mm to 2 mm.

The synthetic resin sheet is not particularly limited, but may be a foamed resin sheet or a non-foamed resin sheet, for example, a polyolefin resin sheet such as a polyethylene resin sheet or a polypropylene resin sheet, a polystyrene resin sheet, Examples of the thermoplastic resin sheet include a polyester resin sheet such as a polyethylene terephthalate resin sheet and a heat-resistant modified polyethylene terephthalate resin sheet. Among them, a material that can withstand heating in a microwave oven, such as a heat-resistant polystyrene-based resin sheet, a polypropylene-based resin sheet, or a heat-resistant modified polyethylene terephthalate-based resin sheet is preferable.
Further, a laminated sheet can be used as the synthetic resin sheet, and examples of the laminated sheet include a laminated sheet obtained by thermally laminating a film on a synthetic resin sheet, a coextrusion laminated sheet, and an extrusion laminated laminated sheet. You can

Examples of thermoforming include vacuum forming, pressure forming, vacuum pressure forming, and hot plate forming.

The container body 2 or the lid 3 may be transparent, semi-transparent, or colored such as black or white, but is preferably transparent or semi-transparent so that the inside can be visually recognized. The container body 2 may be colored, and the lid 3 may be transparent.

The container body 2 includes a bottom surface portion 21 having a horizontally long rectangular shape in plan view, and leg portions 22 that bulge downward from the vicinity of four corners of the bottom surface portion 21.

As shown in FIG. 1, the bottom surface portion 21 is formed as a horizontal plane having a horizontally long rectangular shape in plan view, so that an item such as a food item can be placed thereon.
In the present embodiment, the bottom surface portion 21 is a horizontal surface, but the present invention is not limited to this, and may be, for example, an inclined surface shape or a mountain shape.

As shown in FIG. 2 or 3, the leg portions 22 are provided in the vicinity of the four corners of the bottom surface portion 21, and are formed in a letter shape for plane view deformation by bending both ends of a straight line in the same direction at obtuse angles. , Is bulged downward. The leg portion 22 has a stepped structure, and in the present embodiment, has a two-step structure including a first surface portion 23 and a second surface portion 24.
The first surface part 23 is formed in a horizontal plane, is located inside the container with respect to the second surface part 24, and when stacked on another packaging container 1, can be placed on the top surface part 31 of the lid body 3. is there. It is preferable that the first surface portion 23 and the second surface portion 24 have a shape having a bent portion or a curved portion in a plan view, which increases the strength of the leg portion 22.
The depth of the first surface portion 23 from the bottom surface portion 21 depends on the size of the container body 2, but is preferably 2 mm to 15 mm, and particularly preferably 3 mm to 10 mm. The depth of the second surface portion 24 from the bottom surface portion 21 is preferably 1.5 to 3 with respect to the depth 1 of the first surface portion 23 from the bottom surface portion 21.

The second surface portion 24, Yes formed in a horizontal plane, located in a container outside of the first surface portion 23, becomes lower than the first surface portion 23, when placing the packaging container 1 such as a shelf, ground It is used as a ground plane. The side surface portion 25 between the first surface portion 23 and the second surface portion 24 is a side wall surface portion of the lid body 3 when the container body 2 is stacked on another packaging container 1 and the container body 2 is placed on the upper side of the lid body 3. The shape follows 32.

The side surface portion 25 of the leg portion 22 is a vertical surface or an inclined surface. The inner side surface portion 25a between the bottom surface portion 21 and the first surface portion 23 of the container body 2 extends vertically in the vicinity of the middle in the width direction and bulges inside the container, as shown in FIG. 2 or 3. A protrusion 26 is provided. By providing the protrusion 26, the strength of the leg portion 22 is increased, and the leg portion 22 can be prevented from being broken.
The protrusion 26 is not particularly limited, but may have a triangular shape or a curved shape in cross section. In addition, as shown in FIG. 3, the maximum protrusion width w1 of the protrusion 26 is 0.1 to 2.0 (the protrusion width of the protrusion/first width) of the minimum width w2 of the first surface portion 23 in plan view. The minimum width of the surface portion) is preferable, and 0.5 to 1.5 is particularly preferable.
The width of the first surface portion 23 and the second surface portion 24 in plan view is preferably a constant width, and the width of the second surface portion 24 is 1.2 to 3.0 with respect to the width 1 of the first surface portion 23. Is preferred. In addition, the vicinity of both ends of the first surface portion 23 and the second surface portion 24 in plan view may be wide or narrow.

In the present embodiment, the protrusion 26 is provided on the side surface portion 25a as a single line, but the present invention is not limited to this, and a plurality of lines such as two or three lines may be provided, and any portion of the side surface portion 25 may be provided. It may be provided, for example, on the outer side surface portion 25b between the bottom surface portion 21 and the second surface portion 24 of the container body 2.

The legs 22 may be provided continuously over the circumferential direction of the container body 2, but it is preferable to provide them at appropriate intervals. In the present embodiment, the four legs 22 are provided near the corners of the container body 2, but, for example, the two legs 22 may be provided along two opposing edges.

As shown in FIG. 1, the outer edge portion of the bottom surface portion 21 is provided with a side wall surface portion 27 that rises vertically, and the upper end portion of the side wall surface portion 27 is provided with a flange portion 28 that horizontally projects outward. There is.
A skirt portion 29 that hangs down is provided on the outer edge portion of the flange portion 28. On the surface of the skirt portion 29, a fitted portion 29a, which is recessed at an appropriate position, is formed so that the lid body 3 can be fitted therein.

A pair of opposite corners of the container body 2 are formed in a chamfered shape, and a knob portion 29b horizontally extending outward from the lower end portion of the skirt portion 29 is formed at that portion.

As shown in FIG. 1, the lid 3 includes a top surface portion 31 having a horizontally long rectangular shape in plan view, and a side wall surface portion 32 having an inclined surface extending downward from a peripheral edge of the top surface portion 31.
The top surface portion 31 is formed as a horizontal plane having a horizontally long rectangular shape in plan view, four corners are chamfered, and stepped so that the first surface portions 23 of the leg portions 22 rest on the four corners. ..

The side wall surface portion 32 is an inclined surface that spreads slightly downward from the peripheral edge of the top surface portion 31, and the side surface portion 25 between the first surface portion 23 and the second surface portion 24 of the leg portion 22 is located outside the side wall surface portion 32. It is arranged along the line.

At the lower end of the side wall surface portion 32, there is provided a flange portion 33 that horizontally projects outward, so that when the lid body 3 is fitted into the container body 2, it is placed on the flange portion 28 of the container body 2. is there.

A skirt portion 34 that hangs down is provided on the outer edge portion of the flange portion 33, and is formed along the skirt portion 29 of the container body 2. In addition, a fitting portion 34a is formed on the surface of the skirt portion 34 by appropriately recessing the fitting portion 29a so that the lid portion 3 fits into the container body 2.
In the present embodiment, the lid 3 is formed so as to be externally fitted to the container body 2, but the present invention is not limited to this, and for example, it may be formed so as to be fitted internally and externally. Good.

A pair of opposite corners of the lid 3 are formed in a chamfered shape, and a knob portion 34b horizontally extending outward from the lower end of the skirt portion 34 is formed at that portion, and the lid 3 is picked up. I am able to raise it. With the lid body 3 fitted in the container body 2, the knob portion 34b overlaps the knob portion 29b of the container body 2.

In the packaging container 1, the contents can be placed on the bottom surface portion 21 of the container body 2, and the lid 3 can be fitted therein to accommodate the contents. Since the leg portion 22 has the stepped structure, the leg portion 22 is reinforced and is not easily deformed. Further, by providing the protrusions 26 on the leg portions 22, the strength of the leg portions 22 is increased, the leg portions 22 are less likely to be broken, and it becomes possible to support even a heavy contained item.
Since the leg portions 22 are reinforced, when the container body 2 is placed on a desk or the like and the lid body 3 is put on, the lid body 3 is pushed while being pushed from above. At this time, conventionally, the leg portion may be crushed by this pressing force, but since the leg portion 22 of the present embodiment is reinforced, it has sufficient strength to endure the lid closing work without any problem. It can be carried out.

As shown in FIG. 4, the packaging container 1 can be stacked and displayed in a plurality of stages.
At this time, as shown in FIG. 5, the first surface portion 23 of the leg portion 22 rests in the vicinity of the four corners of the top face portion 31, the side surface portion 25 between the first surface portion 23 and the second surface portion 24, the lid the side wall portion 32 of the body 3 are placed along substantially without clearance. Therefore, the packaging container 1 does not easily shift from the other packaging containers 1, and the other packaging container 1 can be stably placed.

Further, when the packaging containers 1 are stacked, a gap is formed between the top surface portion 31 and the bottom surface portion 21 of the upper container body 2, so that even if the bottom surface portion 21 is bent due to the weight of the contents, the bottom surface portion It is difficult for 21 to come into contact with the lower top surface portion 31, and there is no instability.

Further, when the lid body 3 is transparent or translucent, the top surface portion 31 of the lid body 3 located below the gap between the leg portions 22 can be visually recognized in a state where the packaging containers 1 are stacked. Even when the packaging containers 1 are stacked, it is easy to confirm the contents of each packaging container 1.

When the packaging containers 1 are stacked, a gap is formed between the top surface portion 31 and the bottom surface portion 21, so that there is an effect that dirt or the like attached to the back side of the bottom surface portion 21 does not transfer to the top surface portion 31.

The constitutional aspects of the above-described embodiments are not listed as limiting the present invention, but can be modified as long as the technical object is common, and the present invention includes such modifications.

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Container body 21 Bottom part 22 Leg part 23 First surface part 24 Second surface part 25 Side surface part 25a Inner side surface part 25b Outer side surface part 26 Projection part 27 Side wall surface part 28 Flange part 29 Skirt part 29a Fitted part 29b knob portion 3 lid 31 top surface portion 32 side wall surface portion 33 flange portion 34 skirt portion 34a fitting portion 34b knob portion

Claims (3)

A packaging container made of a synthetic resin sheet, comprising a container body and a lid,
The container body includes concave legs that bulge downward from the bottom surface of the container body,
The bottom surface of the leg portion has a stepped structure including at least a first surface portion and a second surface portion,
The first surface portion is located inside the container and can be placed on the top surface portion of the lid.
The second surface portion is located outside the container and is lower than the first surface portion,
The side surface portion between the first surface portion and the second surface portion has a shape along the side wall surface portion of the lid body when the container body is placed on the upper side of the lid body ,
On the side surface portion inside the container between the bottom surface portion of the container body and the first surface portion of the leg portion, provided with a projection portion that extends the entire length in the longitudinal direction and swells to the inside of the container,
Packaging container. The packaging container according to claim 1 , wherein the maximum protrusion width of the protrusion (protrusion width of protrusion/minimum width of the first face) with respect to the minimum width of the first face is 0.1 to 2.0. .. The packaging container according to claim 1 , wherein the protrusion has a triangular shape or a curved shape in a cross section.

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