Packaging container and method of using packaging container

Abstract

To provide a container which can select a storage form of a content as an upper and lower two-stage type or a single-stage type.SOLUTION: A container body 1 includes a body fitting portion 11; a body flange flat portion 12; a body flange hanging portion 13; and a main body flange tip portion 14. A middle plate 2 includes a middle plate first fitting portion 21, a middle plate flange first flat portion 22, a middle plate flange first hanging portion 23, a middle plate flange second flat portion 24, and a middle plate second fitting portion 25. A lid body 3 includes a lid body fitting portion 31 having a substantially L-shaped cross section formed continuously outward from a lower end of a lid body cover portion 3a. When the container main body 1, the middle plate 2, and the lid body 3 are attached, the body fitting portion 11 and the middle plate first fitting portion 21 are positioned on the same vertical line, and the middle plate flange second flat portion 24 is placed on the body flange flat portion 12, and the middle plate second fitting portion 25 is fitted to the main body flange tip portion 14, and the lid body fitting portion 31 is fitted to the middle plate first fitting portion 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging container that allows selection of the storage form of the contents, and a method of using the packaging container. [Background technology]

[0002] Conventionally, when packaging multiple foods, such as prepared foods and boxed lunches, sold in supermarkets and convenience stores, the container has been divided by a partition or fitted with another container on top of the other container. These configurations have been selected based on the type of food and consumer demand, and Patent Document 1 discloses a technology that solves the problems associated with the latter configuration.

[0003] Patent Document 1 discloses a packaging container in which combined container bodies are difficult to separate, specifically comprising a first container body, a second container body attached from above the first container body, and a lid body attached to the second container body, the first container body having a first body fitting portion on its side wall that is inversely tapered and expands downward, the second container body having a second body fitting portion on its side wall that is inversely tapered and expands downward, and the lid body having a lid fitting portion that is inversely tapered and expands downward, the inner surface of the first body fitting portion fitting with the outer surface of the second body fitting portion, and the outer surface of the lid fitting portion fitting with the inner surface of the second body fitting portion, so that the first body fitting portion, second body fitting portion, and lid fitting portion overlap inward and outward directions, forming a double inner fitting state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-165422 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, the lid is fitted to the second container body, in other words, the lid is not fitted to the first container, so the first container body cannot be closed without the second container body. In other words, the packaging container of Patent Document 1 cannot be closed with the lid even if contents are placed in the first container body without the second container body, so it is expected to be difficult to use because it is limited to use for contents that require placement in the second container body.

[0006] As in Patent Document 1, a configuration with two tiers of containers for storing contents, one above the other, has the advantage of being able to increase the variety and quantity of contents that can be sold as a single product compared to a configuration with two separate containers, and is suitable for selling a set, for example, with white rice in the bottom tier and prepared food in the top tier. However, the inventors have come to the conclusion that in order to meet the diversifying food consumer demands and optimize material costs, it is necessary to make it possible to choose between the two types of configurations mentioned above.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a packaging container and a method for using the packaging container that allow the contents to be stored in a selectable two-tier or single-tier configuration. [Means for solving the problem]

[0008] That is, the packaging container of the present invention comprises a container body, an inner tray attached to the container body, and a lid attached to the container body or the inner tray, and the container body comprises a body fitting portion having a substantially L-shaped cross section formed continuously upward from the upper end of the body accommodating portion, and a body flange extending outward from the upper end of the body fitting portion. extension Department and Located at the outermost end of the container body The inner tray has a first inner tray fitting portion having a generally L-shaped cross section, which is formed continuously upward from the upper end of the inner tray accommodating portion, and a first inner tray flange portion extending outward from the upper end of the first inner tray fitting portion. extension Part and center plate flange first extension a first hanging portion of the inner flange that hangs downward from the outer end of the portion; and a second hanging portion of the inner flange that extends outward from the lower end of the first hanging portion of the inner flange. extension Part and center plate flange second extensionand a second fitting portion of the inner plate having a generally S-shaped cross section and extending downward from the outer end of the portion, and the lid has a second fitting portion of the inner plate having a generally L-shaped cross section formed continuously outward from the lower end of the lid cover portion, and when the container body, the inner plate, and the lid are attached, the main body fitting portion and the first fitting portion of the inner plate are positioned on the same vertical line, and the main body flange extension Part of the middle plate flange second extension The inner tray second fitting portion is fitted to the tip of the flange of the main body, and the lid body fitting portion is fitted to the inner tray first fitting portion.

[0009] Also, the first flange of the center plate extension It is desirable that the angle of a straight line passing near the outer end of the portion and the extreme end of the second fitting portion of the inner tray is 20 to 40°.

[0010] Also, the main body flange extension The width of the part is 2.5 mm or more, and the center flange first extension It is desirable that the width of the part be 1.5 mm or more.

[0011] Also, the first flange of the center plate extension It is desirable that the thickness of the part be 0.4 mm or less.

[0012] In addition, when the container body and the lid are attached to each other, it is desirable that the lid fitting portion fits into the body fitting portion.

[0013] The method of using the packaging container is based on the interior of a specified retail store and includes the steps of preparing an inner tray to hold food and to which a lid is attached in a first area corresponding to a section outside the store, such as a food manufacturing factory or another retail store, or within the store, and preparing a container body to hold food and to which the inner tray is attached in a second area other than the first area corresponding to a section inside the store or a section other than the section inside the store.

[0014] The method of using the packaging container is characterized by including the step of preparing, outside or inside the store, a container body or inner plate containing food and having a lid attached thereto. [Effects of the Invention]

[0015] According to the present invention, it is possible to expect the effect that the storage form of the contents can be selected as a two-tiered or single-tiered storage form. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a state before the container body, inner tray, and lid body of a packaging container according to an embodiment of the present invention are attached. [Figure 2] FIG. 2 is a front view showing the state before the container body, inner plate, and lid body of the packaging container are attached. [Figure 3] FIG. 2 is a perspective view showing the state after the container body, inner plate, and lid body of the packaging container are attached. [Figure 4] FIG. 2 is a front view showing the state after the container body, inner plate, and lid body of the packaging container are attached. [Figure 5] 3 is an end view of the container body, inner plate, and lid body shown in FIG. 2, divided into two equal parts in the longitudinal direction. [Figure 6] FIG. 6 is an enlarged end view of the AA portion of FIG. 5. [Figure 7] FIG. 7 is an enlarged end view of the inner tray shown in FIG. 6. [Figure 8] 7 is an enlarged end view showing the state after the container body, inner plate, and lid body shown in FIG. 6 have been attached. [Figure 9] FIG. 6 is an end view of the inner tray placed on the lid shown in FIG. 5. [Figure 10] 3 is a front view showing the state after the container body and the lid body shown in FIG. 2 have been attached. [Figure 11] 7 is an enlarged end view showing the state after the container body and the lid body shown in FIG. 6 have been attached. [Figure 12] FIG. 10 is a perspective view showing an inner tray of another packaging container according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, a packaging container (hereinafter also referred to as "this packaging container") according to one embodiment of the present invention and a method of using this packaging container will be described with reference to Figures 1 to 11. 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 up, down, out, in, vertical, horizontal, etc. are basically based on the state in which the packaging container is placed in the orientation in which it is normally used, and when other references are used, they will be explained appropriately.

[0018] <Basic configuration of this packaging container> As shown in Figure 1 or 2, this packaging container is used to package food such as prepared dishes and boxed lunches sold in retail stores such as supermarkets, and comprises a container body 1, an inner tray 2 attached to the container body 1, and a lid 3 attached to the container body 1 or the inner tray 2. The container body 1, inner tray 2, and lid 3 are generally rectangular in plan view, but may also be square, circular, or oval, and there are no limitations on the dimensions such as length, width, and height as long as they are large enough to be placed on a display shelf in a retail store.

[0019] The container body 1 comprises a body fitting portion 11 having an approximately L-shaped cross section that is formed continuously upward from the upper end of the body storage portion 1a, a body flange extension portion 12 that extends outward from the upper end of the body fitting portion 11, a body flange hanging portion 13 that hangs downward from the outer end of the body flange extension portion 12, and a body flange tip portion 14 that protrudes outward from the lower end of the body flange hanging portion 13.

[0020] The inner tray 2 comprises a first inner tray fitting portion 21 having a generally L-shaped cross section, which is formed continuously upward from the upper end of the inner tray accommodating portion 2a, and a first inner tray flange 21 extending outward from the upper end of the first inner tray fitting portion 21. extension Part 22 and the first flange of the center plate extension a first hanging portion 23 of the inner plate flange that hangs downward from the outer end of the portion 22; and a second hanging portion 24 of the inner plate flange that extends outward from the lower end of the first hanging portion 23 of the inner plate flange. extension Part 24, center plate flange 2 extension and a second inner tray fitting portion 25 having a generally S-shaped cross section that hangs downward from the outer end of the portion 24.

[0021] The lid body 3 has a lid body fitting portion 31 with an approximately L-shaped cross section that is formed continuously outward from the lower end of the lid body cover portion 3a, and a lid body flange portion 32 that is approximately horizontal and extends outward from the upper end of the lid body fitting portion 31.

[0022] When the container body 1, the inner tray 2, and the lid body 3 are attached (see FIGS. 3 and 4), the body fitting portion 11 and the inner tray first fitting portion 21 are positioned on the same vertical line, and the body flange extension Part 12: Second flange of the middle dish extension The inner tray second fitting portion 25 is fitted into the main body flange tip portion 14, and the lid body fitting portion 31 is fitted into the inner tray first fitting portion 21.

[0023] According to this configuration, the food can be stored in a two-stage manner, in which the second inner tray fitting portion 25 of the inner tray 2 fits from the outside to the main body flange tip portion 14 of the container main body 1, and the lid body fitting portion 31 of the lid body 3 fits from the inside to the first inner tray fitting portion 21 of the inner tray 2; a single-stage manner, in which the lid body fitting portion 31 of the lid body 3 fits from the inside to the main body fitting portion 11; extension Since three storage configurations can be selected, such as a single-stage configuration with a thermocompression-type top seal attached to the inner tray 12, it is possible to meet the diverse consumer demands for food and to optimize material costs. In other words, the container body 1 and inner tray 2 have a structure in which the lid body 3 can be used for both the upper and lower two-stage configuration and the single-stage configuration. 3 In addition, since there is no need to prepare separate lids for the inner tray 2, it is possible to expect effects such as a reduction in the number of containers in an environmentally friendly way, a reduction in the burden of inventory management, and a reduction in the space required for temporary container storage in food preparation areas.

[0024] <Specifications of the material, forming method, dimensions, etc. of the container body 1> The container body 1 is molded using a synthetic resin sheet as a base material. The synthetic resin sheet may be made of, for example, an olefin-based resin such as polyethylene or polypropylene, polystyrene paper (PSP) made from a polystyrene-based resin, high impact polystyrene (HIPS) in which GP polystyrene is blended with an elastomer such as a butadiene copolymer to improve impact resistance, or a polyester-based resin such as polyethylene terephthalate. It may be composed of a single layer or multiple layers, may be colored, colorless, transparent, or opaque, and may be formed from a heat-resistant material. Examples of heat-resistant materials include non-foamed composite materials containing 40 to 90% by mass of an olefin-based resin such as polypropylene and 10 to 60% by mass of an inorganic filler such as talc. The synthetic resin sheet is formed into the desired container body shape by a thermoforming method such as vacuum forming, hot plate pressure forming, vacuum pressure forming, or double-sided vacuum forming. The front and / or back surfaces of the synthetic resin sheet may be laminated with a synthetic resin film. The synthetic resin film may be composed of a single layer or multiple layers that have heat resistance, oil resistance, lamination suitability with a printed layer, gas barrier properties, etc., and may also include a printed layer when laminated on the surface of a synthetic resin sheet.

[0025] In other words, the synthetic resin sheet may be made of either foamed or non-foamed resin, but a non-foamed resin sheet is preferred in consideration of the dimensional accuracy of the fitting portion. The thickness of the synthetic resin sheet is not particularly limited, but in the case of a low-expansion resin sheet, for example, primarily composed of polystyrene, with an expansion ratio of 1.5 to 3 times, it is sufficient to be 0.5 to 3 mm, preferably 1 to 2 mm; in the case of a high-expansion resin sheet, for example, primarily composed of polypropylene, with an expansion ratio of 5 to 15 times, it is sufficient to be 1.5 to 5 mm, preferably 2 to 4 mm, more preferably 2.5 to 3.5 mm; in the case of a non-expansion resin sheet, for example, primarily composed of olefin such as polypropylene, or a non-expansion composite material sheet containing 40 to 90 mass% of an olefin-based resin such as polypropylene and 10 to 60 mass% of an inorganic filler such as talc, it is sufficient to be 0.35 to 0.6 mm; in the case of a non-expansion resin sheet, for example, primarily composed of polyester such as polyethylene terephthalate, it is sufficient to be 0.4 to 0.6 mm; and in the case of a non-expansion resin sheet, for example, primarily composed of high impact polystyrene (HIPS), it is 0.35 to 0.7 mm. The expansion ratio is calculated by measuring the specific volume (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.

[0026] <Specifications for material, forming method, dimensions, etc. of inner plate 2> The tray 2 is molded using a synthetic resin sheet as a base material. The synthetic resin sheet may be made of, for example, an olefin-based resin such as polyethylene or polypropylene, high-impact polystyrene (HIPS), which is made by blending GP polystyrene with an elastomer such as butadiene copolymer to improve impact resistance, or a polyester-based resin such as polyethylene terephthalate. It may be composed of a single layer or multiple layers, may be colored, colorless, transparent, or opaque, and may be made of a heat-resistant material. The synthetic resin sheet is formed into the desired tray shape using a thermoforming method such as vacuum forming, hot plate pressure forming, vacuum pressure forming, or double-sided vacuum forming. The front and / or back of the synthetic resin sheet may be laminated with a synthetic resin film. The synthetic resin film may be composed of a single layer or multiple layers that have heat resistance, oil resistance, lamination suitability with a printed layer, gas barrier properties, etc., and may include a printed layer when the surface of the synthetic resin sheet is laminated. Considering the dimensional accuracy of the fitting portion, the synthetic resin sheet is preferably made of a non-foamed resin. There are no particular restrictions on the thickness of the synthetic resin sheet, but for example, in the case of a non-foamed resin sheet whose main component is an olefin such as polypropylene, or a non-foamed composite material sheet containing 40 to 90% by mass of an olefin-based resin such as polypropylene and 10 to 60% by mass of an inorganic filler such as talc, it is sufficient if it is 0.2 to 0.5 mm; in the case of a non-foamed resin sheet whose main component is polyester such as polyethylene terephthalate, it is sufficient if it is 0.2 to 0.4 mm; and in the case of a non-foamed resin sheet whose main component is high impact polystyrene (HIPS), it is 0.2 to 0.5 mm.

[0027] In particular, the center plate flange extension By making the thickness of the portion 22 0.4 mm or less, and at least thinner than the thickness of the container body 1, it becomes easier to realize this packaging container as a two-tiered or single-tiered container. This is because the area near the flange of the middle plate is very uneven, and the ratio of the surface area after molding to the area of ​​the sheet (also called the stretching ratio) is large, and furthermore, in the molding process, the sheet is stretched and gradually becomes thinner as it moves downward from the flange portion into the molding die, but a thinner sheet thickness reduces the difference in thickness between the upper and lower parts of the fitting portion, making fitting setting easier and more stable. Middle plate flange first extension The thickness of the portion 22 may be 0.2 to 0.4 mm, preferably 0.25 to 0.35 mm, and more preferably 0.3 to 0.33 mm.

[0028] <Specifications for the material, forming method, dimensions, etc. of the lid 3> The lid 3 is molded using a synthetic resin sheet as a base material. The synthetic resin sheet may be made of, for example, an olefin resin such as polyethylene or polypropylene, OPS obtained by biaxially stretching a polystyrene resin, or a polyester resin such as polyethylene terephthalate. It may be composed of a single layer or multiple layers and may be colored, colorless, transparent, or opaque, although transparent is preferred. It may also be formed from a heat-resistant material. The synthetic resin sheet is formed into the desired lid shape by a thermoforming method such as vacuum forming, hot plate pressure forming, vacuum pressure forming, or double-sided vacuum forming. The front and / or back of the synthetic resin sheet may be laminated with a synthetic resin film. The synthetic resin film may be composed of a single layer or multiple layers that have heat resistance, oil resistance, lamination suitability with a printed layer, gas barrier properties, etc., and may include a printed layer when laminated on the surface of the synthetic resin sheet. The synthetic resin sheet is preferably made of a non-foamed resin. There are no particular restrictions on the thickness of the synthetic resin sheet, but for example, in the case of a transparent non-foamed resin sheet whose main component is an olefin such as polypropylene, it is sufficient if it is 0.3 to 0.4 mm; in the case of a transparent non-foamed resin sheet whose main component is a polyester such as polyethylene terephthalate, it is sufficient if it is 0.25 to 0.35 mm; and in the case of an OPS sheet obtained by biaxially stretching a polystyrene-based resin, it is 0.23 to 0.35 mm.

[0029] Each part will be explained below.

[0030] <Main body storage section 1a> As shown in Figure 5, the main body storage section 1a has a main body bottom 1b on which food is placed, main body legs 1c extending downward from the peripheral edge of the main body bottom 1b, main body side sections 1d rising upward and sloping outward from the peripheral edge of the main body legs 1c, and a main body step section 1f with a generally L-shaped cross section extending upward and outward from the upper end of the main body side sections 1d. In other words, the entire bottom of the main body storage section 1a is composed of the main body bottom 1b and the main body legs 1c, and is formed convexly toward the inside of the main body storage section 1a and concavely toward the outside. The main body bottom 1b is formed at a relatively higher position than the main body legs 1c. The main body side sections 1d are formed in a wave-like shape in both the vertical and horizontal directions.

[0031] <Main body fitting portion 11> As shown in Figure 6, the main body fitting portion 11 has a main body fitting bottom 11a extending outward from the upper end of the main body step portion 1f, main body fitting corners 11b extending upward and outward from the outer end of the main body fitting bottom 11a, and main body fitting side portions 11c sloping upward and inward from the outer end of the main body fitting corners 11b. In other words, the main body fitting portion 11 is formed in an inverted tapered shape. The inclination angles of the main body fitting corners 11b and main body fitting side portions 11c are not limited.

[0032] <Main body flange extension 12> As shown in FIG. 6 , the main body flange extension 12 includes a first main body flange extension 12a, which is angled upward and outward from the upper end of the main body fitting portion 11, and a second main body flange extension 12b, which extends outward from the upper end of the first main body flange extension 12a. The length ratio of the first main body flange extension 12a to the second main body flange extension 12b relative to the overall length of the main body flange extension 12 is 1:5 to 1:2, preferably 1:4 to 1:3. The width of the main body flange extension 12 is not particularly limited as long as it is 2.5 mm or more or 4 mm or more, but is preferably 4 to 12 mm, more preferably 5.5 to 10 mm, and even more preferably 6.5 to 8.5 mm. The second main body flange extension 12b may be substantially horizontal or may be gently curved upward. If curved, the radius of curvature may be 5 to 30 mm.

[0033] <Main body flange hanging part 13> As shown in FIG. 6, the main body flange hanging portion 13 is extension The portion 12b hangs downward and outward at an inclination from the outer end thereof.

[0034] <Main body flange tip 14> As shown in FIG. 6, the body flange tip 14 is c and is located at the outermost end of the container body 1.

[0035] <Intermediate tray storage section 2a> As shown in FIG. 5, the tray housing 2a includes a tray bottom 2b on which food is placed, a tray leg 2c extending downward from the peripheral edge of the tray bottom 2b, a tray side 2d extending upward from the peripheral edge of the tray leg 2c, and a tray step 2f with a generally L-shaped cross section extending upward and outward from the top of the tray side 2d. In other words, the entire bottom of the tray housing 2a is formed by the tray bottom 2b and the tray leg 2c, and is convex toward the inside of the tray housing 2a and concave toward the outside. The tray bottom 2b is positioned relatively higher than the tray leg 2c. The tray side 2d is formed in a vertically wavy shape. The projected area of ​​the tray housing 2a is approximately the same as that of the main storage section 1a. The capacity of the tray housing 2a is smaller than that of the main storage section 1a because it is shallower.

[0036] <First fitting portion of inner tray 21> As shown in FIG. 6, the first fitting portion 21 includes a fitting bottom 21a extending outward from the top of the stepped portion 2f, a fitting corner 21b extending upward and outward from the outer edge of the fitting bottom 21a, and a fitting side 21c sloping upward and inward from the outer edge of the fitting corner 21b. In other words, the first fitting portion 21 is formed in an inverted tapered shape. The angle of inclination of the fitting side 21c is not limited except that it is equal to the angle of inclination of the main body fitting side 11c. The height from the fitting bottom 21a to the top of the fitting side 21c, which corresponds to the height of the first fitting portion 21, is not limited except that it is equal to or less than the height from the main body fitting bottom 11a to the top of the main body fitting side 11c, which corresponds to the height of the main body fitting portion 11.

[0037] <Intermediate plate flange No. extension Part 22> As shown in Figure 6, the center plate flange first extension The width of the portion 22 is 1.5 mm or more, and the width of the main body flange is 4 mm or more. extension Although there are no limitations on the width other than that it is narrower than the width of the portion 12, it is preferably 1.5 to 10 mm, more preferably 3 to 7 mm, and even more preferably 4 to 6 mm. extension First flange of center plate relative to width of section 12 extension The second flange of the innermost part of section 22 extension The width of the outermost portion 24 can be optimized. extension The positional relationship between the inner plate flange first extension portion 24 and the inner plate flange second fitting portion 25 can be optimized. extension The portion 22 may have a corner-cut portion 22a that extends upward and outward from the upper end of the inner tray first fitting portion 21, and a portion 22b that extends outward and approximately horizontally from the upper end of the above portion. Here, the length ratio of the corner-cut portion 22a to the approximately horizontally extending portion 22b is 1:5 to 1:2, and preferably 1:4 to 1:3. A part that extends almost horizontally 22b may be gently curved upward, and if curved, the radius of curvature may be 5 to 30 mm.

[0038] <First hanging part of inner plate flange 23> 6, the inclination angle of the first hanging portion 23 of the inner plate flange is approximately the same as the inclination angle of the inner plate fitting side portion 21c, but it may be approximately 90° with respect to the horizontal. The lower end of the first hanging portion 23 of the inner plate flange is located higher than the lower end of the inner plate fitting side portion 21c.

[0039] <Intermediate plate flange No. 2 extension Part 24> 6, the middle plate flange second extension The width of part 24 is the first flange of the center plate. extension Narrower than the width of section 22.

[0040] <Second fitting portion of inner tray 25> As shown in FIG. 6, the second fitting portion 25 of the inner plate is extension The second fitting upper portion 25a hangs downward from the outer end of the second fitting portion 24, the second fitting central portion 25b bulges outward from the lower end of the second fitting upper portion 25a and hangs downward, and the second fitting lower portion 25c bulges inward from the lower end of the second fitting central portion 25b and hangs downward. In other words, the second fitting central portion 25b is located outside the second fitting upper portion 25a and the second fitting lower portion 25c.

[0041] <Intermediate plate flange No. extension Amount of overhang of the area outside part 22> As shown in Figure 7, the center plate flange first extension The first hanging portion 23 of the inner flange and the second hanging portion 24 of the inner flange are located outside the portion 22. extension The total protrusion amount W of the inner plate flange first fitting portion 24 and the inner plate second fitting portion 25 affects the formability of the inner plate second fitting portion 25. extension The first flange of the inner plate corresponding to the vicinity of the outer end of the portion 22 extension Outer end 22 cand the inner tray second fitting end portion 25d, which corresponds to the outermost end of the inner tray 2 and is the inner tray second fitting end portion 25d, the angle D of the imaginary line L connecting the inner tray second fitting end portion 25d and the inner tray second fitting end portion 25d, which corresponds to the outermost end of the inner tray 2, is 20 to 40 degrees with respect to the vertical line, the total protrusion amount W is optimized to be 5 to 15 mm, and therefore the inner tray second fitting portion 25 is molded into the desired shape, and preferably the angle D is 25 to 35 degrees and the protrusion amount W is 6 to 10 mm, and more preferably the angle D is 27 to 33 degrees and the protrusion amount W is 7 to 9 mm. Here, the outermost end of the inner tray second fitting portion 25 refers to the cut portion, and the cut portion is 0.5 to 1.5 mm outward from the point where the outermost and approximately horizontal extension begins, among the portion extending outward and approximately horizontally located at the lower end of the inner tray second fitting portion 25.

[0042] <Lid cover portion 3a> As shown in Figure 6, the lid cover portion 3a has a lid top surface portion 3b, a lid step portion 3c formed continuously downward from the peripheral edge of the lid top surface portion 3b, and a lid side portion 3d extending downward at an angle from the peripheral edge of the lid step portion 3c. In other words, the entire top surface of the lid cover portion 3a is composed of the lid top surface portion 3b and the lid step portion 3c. The lid top surface portion 3b is formed at a relatively higher position than the lid step portion 3c. The projected area of ​​the lid cover portion 3a is approximately the same as that of the main body storage portion 1a and the inner tray storage portion 2a.

[0043] <Lid fitting portion 31> As shown in FIG. 6, the lid fitting portion 31 has a lid fitting bottom portion 31a extending outward from the bottom end of the lid side portion 3d, a lid fitting corner portion 31b extending upward and outward from the outer end of the lid fitting bottom portion 31a, and a lid fitting side portion 31c sloping upward and inward from the outer end of the lid fitting corner portion 31b. In other words, the lid fitting portion 31 is formed in an inverted tapered shape. The inclination angle of the lid fitting side portion 31c is not limited except that it is equal to the inclination angle of the inner tray fitting side portion 21c. The height from the lid fitting bottom portion 31a to the upper end of the lid fitting side portion 31c, which corresponds to the height of the lid fitting portion 31, is not limited except that it is equal to or less than the height of the inner tray first fitting portion 21.

[0044] <Lid flange part 32> As shown in FIG. 6, the lid flange portion 32 has a lid flange first portion 32a that extends upward and outward at an angle from the upper end of the lid fitting side portion 31c, and a lid flange second portion 32b that extends outward from the upper end of the lid flange first portion 32a.

[0045] The relationship between the container body 1, inner tray 2 and lid body 3 when they are attached will be described below.

[0046] <Mutual relationship between the container body 1 and the inner tray 2 when attached> As shown in Figure 8, the main body fitting bottom 11a and the inner dish fitting bottom 21a are positioned on the same vertical line, the main body fitting corner 11b and the inner dish fitting corner 21b are positioned on the same vertical line, and the main body fitting side 11c and the inner dish fitting side 21c are positioned on the same vertical line. In other words, the upper inner dish fitting bottom 21a, inner dish fitting corner 21b, and inner dish fitting side 21c are positioned so as to overlap when slid pseudo-close to the lower main body fitting bottom 11a, main body fitting corner 11b, and main body fitting side 11c, and therefore do not fit together. The outer surface of the main body flange first extension 12a and the outer surface of the inner dish fitting corner 21b are in contact with each other. do .

[0047] Body flange width of 2.5mm or more extension The second body flange, which is part of section 12 extension The first flange of the center plate 12b has a width of 1.5 mm or more. extension Narrower flange than part 22 extension In other words, the lower end of the first hanging portion 23 of the inner flange is placed on the second hanging portion 24 of the main body flange. extension The second flange of the main body is positioned inside the outer end of the portion 12b. extension Adjacent to the portion 12b, the second flange of the center plate extension The outer end of the portion 24 is connected to the body flange second extension The flange 12b is located between the outer end of the flange 12b and the outer end of the flange tip 14 of the main body.

[0048] The inner surface of the inner tray second fitting portion 25 fits into the outer end of the main body flange tip portion 14. In other words, the inner tray 2 is externally fitted to the container body 1 at the inner tray second fitting portion 25. In detail, the inner tray second fitting upper portion 25a is located between the outer end of the main body flange tip portion 14 and the main body flange second fitting portion 25a in the horizontal direction. extension The lower end of the inner tray second fitting upper portion 25a is located between the upper and lower ends of the main body flange hanging portion 13 in the vertical direction. The inner tray second fitting lower portion 25c is located inside the outer end of the main body flange tip portion 14 in the horizontal direction.

[0049] <Mutual relationship between inner tray 2 and lid body 3 when attached> As shown in Figure 8, the inner surface of the lid fitting side portion 31c fits into the outer surface of the inner dish fitting side portion 21c. The back surface of the lid fitting bottom portion 31a contacts the surface of the inner dish fitting bottom portion 21a. In other words, the inner dish 2 supports the lid body 3 at least at two points, the inner dish fitting side portion 21c and the surface of the inner dish fitting bottom portion 21a, and the lid body 3 fits into the inner dish 2 at the lid fitting side portion 31c. extension The rear surface of the cover flange first portion 32a may be in contact with the surface of the portion 22.

[0050] Other interrelationships between the inner tray 2 and the lid 3 will be described below.

[0051] <Other relationships between the inner plate 2 and the lid 3> As shown in Figure 9, the lid 3 is positioned below and the inner tray 2 is positioned above, with the inner tray legs 2c of the upper inner tray housing 2a fitting into the lid step 3c of the lower lid cover 3a, and the inner tray bottom 2b resting on the lid top 3b. In other words, the lid top 3b of the lower lid 3 fits into the concave inner tray bottom 2b of the lower inner tray 2. With this configuration, the inner tray 2 remains stable even when stacked on the lid 3, eliminating the need to place the inner tray 2, with its underside soiled by being attached to the container body 1 containing food, on the dining table, etc., and also providing the expected benefit of freeing up space on the dining table during meals.

[0052] The relationship between the container body 1 and the lid body 3 in the attached state (see FIG. 10) will be described below.

[0053] <Interrelationship between container body 1 and lid body 3> As shown in Fig. 10, the outer surface of the lid fitting side portion 31c fits into the inner surface of the main body fitting side portion 11c. extension That is, the container body 1 is in contact with at least the inner surface of the body fitting side portion 11c and the back surface of the body flange second portion 32b. extension The lid 3 is supported at two points, the first point being the surface of the bottom 11a and the second point being the surface of the bottom 12b, and the lid 3 is internally fitted into the container body 1 at the lid fitting side 31c. With this configuration, the present packaging container can be realized as a single-stage container. The back surface of the lid fitting bottom 31a may contact the surface of the main body fitting bottom 11a.

[0054] 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.

[0055] Here, with reference to Figure 12, another packaging container according to one embodiment of the present invention will be described in terms of the differences from the packaging container described above, and descriptions of equivalent parts and parts less relevant to the present invention will be omitted. For ease of reference, parts or portions equivalent to those shown in Figures 1 to 11 are numbered in Figure 12 by adding 100 to the numbers in Figures 1 to 11.

[0056] As shown in FIG. 12, the inner plate 102 has an inner plate flange second extension The inner plate 102 is provided with an inner plate finger hook 126 that is formed to bulge outward, continuing from the inner plate second fitting portion 124 and the inner plate second fitting portion 125. The inner plate finger hook 126 is dome-shaped and large enough to fit a human finger. The inner plate 102 is externally fitted to the container body excluding the inner plate finger hook 126. This allows the finger to be inserted through the inner plate finger hook 126 and directly touch the body flange, which is expected to make it easier to remove the inner plate from the container body.

[0057] Furthermore, although not specifically shown, it is preferable that the container body be formed with a gripping portion that can be held by the end consumer's fingers when removing the inner tray, and it is even more preferable that the gripping portion extend beyond at least the peripheral edge of the inner tray and be formed so as to be bent, which is expected to make it easier for the end consumer to remove the inner tray from the container body.

[0058] Hereinafter, a method of using the present packaging container will be described with reference to Figure 1. The location where the present packaging container is used is inside a specific retail store such as a supermarket. The outside of the store other than the inside of the store is, for example, a food manufacturing factory or other store.

[0059] <Example of how to use this packaging container as a two-tiered container> A process of preparing a tray 2 with a lid 3 attached thereto and containing food outside the store, and a process of storing food in the tray prepared in the process described above inside the store. 2 and a step of preparing container body 1 having lid 3 attached thereto. By including these steps, for example, a side dish contained in inner tray 2 can be closed with lid 3 outside the store and transported to the store, and inside the store, polished rice contained in container body 1 can be closed with inner tray 2 having lid 3 attached thereto, thereby selling a set of side dish and polished rice contained in a single packaging container. The side dish contained in inner tray 2 may be of multiple types, for example, ingredients for various types of rice bowls or side dishes other than those for rice bowls, and staple foods other than polished rice or side dishes other than the side dish contained in inner tray 2 may also be contained in container body 1; these may be determined based on the consumer's wishes or the sales format of the retailer.

[0060] <Examples of how to use this packaging container as a two-tier or single-tier container> The process includes a step of preparing, outside or inside the store, a container body 1 or an inner plate 2 containing food and fitted with a lid 3. In other words, the process includes a step of selecting a pattern of the following steps. Pattern 1: A process of preparing a container body 1 containing food and having a lid body 3 attached thereto outside the store Pattern 2: A process of preparing a tray 2 with a lid 3 attached and containing food outside the store Pattern 3: A process of preparing a container body 1 in which food is contained and to which a lid body 3 is attached in the store Pattern 4: A process of preparing a tray 2 in the store that contains food and has a lid 3 attached. That is, the above-mentioned example of using the present packaging container as a two-tiered container is merely an example, and retailers can select patterns 1 to 4 to use the present packaging container as a two-tiered container or a single-tiered container. [Explanation of symbols]

[0061] 1 Container body 1a Main body storage section, 1b Main body bottom section, 1c Main body legs, 1d Main body side section 11 main body fitting portion, 11a main body fitting bottom portion, 11b main body fitting corner Part 11c Main body fitting side Department 12 Body flange extension Part 12a Body flange 1 extension Part 12b Body flange second extension Department 13 Body flange sagging part 14 Main body flange tip 2, 102 medium plate 2a: tray storage section, 2b: tray bottom, 2c: tray legs, 2d: tray side 21: first fitting portion of inner tray; 21a: fitting bottom portion of inner tray; 21b: fitting corner portion of inner tray; 21c: fitting side portion of inner tray 22 Center plate flange 1 extension Department 23 First hanging part of inner plate flange 24, 124 Secondary flange extension Department 25, 125 Inner plate second fitting part, 25a Inner plate second fitting upper part, 25b Inner plate second fitting center part, 25c Inner plate second fitting lower part, 25d Inner plate second fitting end part 126 Middle plate finger rest 3 Lid 3a: Lid cover portion; 3b: Lid top surface portion; 3c: Lid step portion; 31: Lid fitting portion, 31a: Lid fitting bottom portion, 31b: Lid fitting corner portion, 31c: Lid fitting side portion 32: Lid flange portion; 32a: Lid flange first portion; 32b: Lid flange second portion

Claims

1. The container comprises a container body, an inner tray attached to the container body, and a lid attached to both the container body and the inner tray, The container body is a main body fitting portion having a generally L-shaped cross section and formed continuously upward from the upper end of the main body accommodating portion; a main body flange extension portion extending outward from an upper end of the main body fitting portion; a main body flange tip portion located at the outermost end of the container main body, The main body flange extension portion has an inclined main body flange first extension portion, The middle plate is a first fitting portion of the inner tray having a substantially L-shaped cross section and formed continuously upward from the upper end of the inner tray accommodation portion; a first inner plate flange extension portion extending outward from an upper end of the first inner plate fitting portion; a first hanging portion of the inner platter flange hanging downward from an outer end of the first extending portion of the inner platter flange; a second extension portion of the inner plate flange extending outward from a lower end of the first hanging portion of the inner plate flange; a second fitting portion having a generally S-shaped cross section that hangs downward from the outer end of the second extension portion of the flange of the inner tray; The first fitting portion of the inner tray has an inclined fitting corner portion of the inner tray, the lid body includes a lid body fitting portion having a generally L-shaped cross section, the lid body fitting portion being formed continuously outward from the lower end of the lid body cover portion, When the container body, inner tray, and lid are attached, The main body fitting portion and the first fitting portion of the inner tray are positioned on the same vertical line, The second extension of the inner flange is placed on the extension of the main body flange, The second fitting part of the inner tray fits onto the tip of the main body flange, The lid fitting portion is fitted into the first fitting portion of the inner tray, The first extension of the main body flange and the fitting corner of the inner tray come into contact. A packaging container characterized by:

2. The angle between a straight line extending vertically and a straight line passing through the vicinity of the outer end of the first extension part of the center plate flange and the extreme end of the second fitting part of the center plate is 20 to 40 degrees.

2. The packaging container according to claim 1.

3. The width of the main body flange extension is 2.5 mm or more, The width of the first extension of the inner flange is 1.5 mm or more.

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

4. The thickness of the first extension of the inner flange is 0.4 mm or less.

4. The packaging container according to claim 1.

5. When the container body and the lid body are attached, The lid fitting part fits into the main body fitting part.

5. The packaging container according to claim 1.

6. preparing an inner tray containing food and having a lid attached thereto in a first area; and preparing a container body having food contained in a second area other than the first area and having the inner plate attached thereto. A method for using the packaging container according to any one of claims 1 to 5.

7. The process includes preparing a container body or inner plate in which food is stored and to which a lid is attached, either inside or outside the store. A method for using the packaging container according to any one of claims 1 to 5.

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