Packaging container

Abstract

To provide a packaging container capable of preventing leakage of liquid from a food material contained in an inner plate and reducing a storage space for a lid.SOLUTION: A packaging container comprises a body 1, an inner plate 2 to be placed on the body 1, and a lid 3 to be placed on the inner plate 2. The body 1 includes a body bottom part 10, a body side part 11 and a body flange part 12. The inner plate 2 includes an inner plate internal fitting part and an inner plate external fitting part that is externally fitted to the body flange part 12. The lid 3 has a lid internal fitting part that internally fits into the inner plate internal fitting part, and a lid external fitting part that externally fits into the body flange part 12 when the inner plate 2 is not attached to the body 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging container for containing food, and in particular to a packaging container having an inner tray. [Background technology]

[0002] For example, in the case of rice bowl dishes such as tendon and katsudon, it is desirable to store the rice and the ingredients separately to prevent the ingredients such as tempura from becoming soggy. For this reason, a container with an inner tray is used, where the rice is stored in the main body and the ingredients such as tempura are stored in the inner tray.

[0003] In such a container with an inner plate, when the main body is made of paper, for example, the flange portion of the main body is a curled portion having a curled shape. Therefore, the inner plate is externally fitted to the curled portion of the main body. The following Patent Document 1 proposes a configuration in which the inner plate is externally fitted to the curled portion of the paper main body, and the lid is externally fitted to the inner plate. In addition, when the inner plate is not used, the lid can be externally fitted to the curled portion of the main body. The lid is provided with a first fitting portion that externally fits to the inner plate, and above the first fitting portion, a second fitting portion that externally fits to the main body is provided. However, with this container, there is a problem that when the ingredients contained in the inner plate contain a lot of moisture, the moisture is likely to leak. In addition, the outer edge of the inner plate is located immediately below the outer fitting portion of the inner plate, and the first fitting portion of the lid is externally fitted to the outer edge of the inner plate. Therefore, when attempting to release the external engagement between the first engaging portion of the lid and the outer edge of the inner plate to remove the lid from the inner plate, the external engaging portion of the inner plate may come off the curled portion of the main body, causing the inner plate to come off inadvertently from the main body.

[0004] On the other hand, the following Patent Document 2 describes a configuration in which an inner plate fits externally to the curled portion of a paper body, and a lid fits internally to the inner plate. In this case, since the lid fits internally to the inner plate, it is possible to prevent the juices of the ingredients contained in the inner plate from leaking. However, the lid cannot fit externally to the curled portion of the body. Therefore, for applications in which the inner plate is not used, such as for seafood bowls, a separate lid that fits externally to the curled portion of the body is required, and two types of lids must be stored in the back of the store, which puts a strain on the storage space in the back of the store. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-164205 A [Patent Document 2] JP 2004-131119 A Summary of the Invention [Problem to be solved by the invention]

[0006] To provide a packaging container capable of preventing leakage of liquid from ingredients contained in an inner plate and reducing the storage space for a lid. [Means for solving the problem]

[0007] The packaging container of the present invention is a packaging container comprising a main body, a middle plate to be placed on the main body, and a lid to be placed on the middle plate, wherein the main body comprises a main body bottom surface portion, a main body side surface portion, and a main body flange portion, the middle plate comprises a middle plate internal fitting portion and a middle plate external fitting portion that externally fits into the main body flange portion, and the lid comprises a lid internal fitting portion that internally fits into the middle plate internal fitting portion, and a lid external fitting portion that externally fits into the main body flange portion when the middle plate is not attached to the main body.

[0008] According to this configuration, when the inner plate is used, the inner plate fitting portion of the inner plate fits externally to the main body flange portion of the main body. Therefore, there are few restrictions on the shape of the main body flange portion, and the main body flange portion can be easily formed. In addition, the inner plate is provided with an inner plate internal fitting portion, and the lid internal fitting portion of the lid fits internally into the inner plate internal fitting portion. Therefore, moisture from the ingredients contained in the inner plate is unlikely to leak out to the outside. On the other hand, the same lid can be used even when the inner plate is not used. That is, since the lid is provided with a lid external fitting portion, when the inner plate is not used, the lid external fitting portion can be externally fitted into the main body flange portion of the main body. In this way, the same lid can be used regardless of whether the inner plate is used or not. Therefore, there is no need to prepare two types of lids, and there is also no need to store two types of lids in the back yard of the store. Therefore, the management work of the containers is reduced and the storage space is also reduced.

[0009] In particular, in a state where the inner plate outer fitting portion is externally fitted to the main body flange portion and the lid inner fitting portion is internally fitted to the inner plate inner fitting portion, it is preferable that the outer edge of the lid is located above and apart from the outer edge of the inner plate and located outside and below the lid inner fitting portion. According to this configuration, since the outer edge of the lid is located above and apart from the outer edge of the inner plate, when the lid inner fitting portion is released from the inner plate inner fitting portion and the lid is removed from the inner plate, the lid can be easily removed by hooking the fingertips on the outer edge of the lid, and the inner plate can be easily prevented from coming off the main body together with the lid, and only the lid can be easily removed from the inner plate. Furthermore, since the outer edge of the lid is located outside and below the lid inner fitting portion, the distance from the lid inner fitting portion to the outer edge of the lid is long. Therefore, by hooking the fingertips on the outer edge of the lid and applying an upward force to the outer edge of the lid, a large inward moment can be applied to the lid inner fitting portion. Therefore, the internal fitting state between the lid internal fitting portion and the inner plate internal fitting portion can be easily released, and the lid can be easily removed from the inner plate.

[0010] The main body is provided with legs protruding downward from the periphery of the bottom surface of the main body, the inner plate is provided with a support surface portion on the outside of the inner plate fitting portion, and the lid is provided with a leg support surface portion provided on the outside of the lid fitting portion and overlapping the upper side of the support surface portion when the lid is attached to the inner plate, and a stacking protrusion provided on the outside of the leg support surface portion and protruding upward, and when containers with the inner plate attached to the main body and the lid attached to the inner plate are stacked vertically, it is preferable that the legs of the upper container are placed on the leg support surface portion of the lower container and engage with the inside of the stacking protrusion. According to this configuration, when the containers are stacked vertically, the legs of the upper container engage with the inside of the stacking protrusion of the lower container. Therefore, the upper container is prevented from being displaced laterally relative to the lower container. The legs of the upper container are placed on the leg support surface portion of the lower container, but the support surface portion overlaps the lower side of the leg support surface portion. That is, the upper container can be supported by the double support surface. Therefore, even if the load of the upper container acts on the leg support surface, the leg support surface is not easily deformed, and the load of the upper container can be firmly supported by the double structure of the leg support surface and the support surface. Moreover, the lid internal fitting portion is located on the inside of the leg support surface, and the inner plate internal fitting portion is located on the inside of the support surface, and the lid internal fitting portion is internally fitted into the inner plate internal fitting portion. Therefore, the load of the upper container acting on the leg support surface and the support surface can be received by the lid internal fitting portion and the inner plate internal fitting portion that are in an internally fitted state. When the inner plate is used, food is stored not only in the main body but also in the inner plate, so the load of the container with the inner plate is large. Since the lower container firmly supports this large load, the stacked state of the containers is stable. Furthermore, since the leg support surface is less likely to deform, the stacking protrusion provided on the outside of the leg support surface is also less likely to deform, the engagement between the stacking protrusion and the leg is maintained, and lateral shifting of the containers is reliably prevented.

[0011] In particular, the main body is preferably made of paper, which allows the main body to be easily manufactured and the main body flange portion to be easily formed. Effect of the Invention

[0012] As described above, since the inner plate and the lid are externally fitted to the main body, there are few restrictions on the shape of the flange of the main body, and the main body can be easily manufactured. In addition, since the lid can be internally fitted to the inner plate, it is possible to prevent leakage of food ingredients contained in the inner plate. Moreover, even when the inner plate is not used, the lid can be externally fitted to the main body, eliminating the need to prepare two types of lids and reducing the storage space of the container. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view showing an open state of a packaging container in one embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] 3(a) is a front view of the center plate, and (b) is a cross-sectional view taken along the line AA in FIG. [Diagram 5] FIG. [Figure 6] 5. (a) is a front view of the lid, and (b) is a cross-sectional view taken along the line B--B in FIG. [Figure 7] FIG. [Figure 8] FIG. 4 is a cross-sectional view of the main part of the container in an open state. [Figure 9] FIG. 4 is a cross-sectional view of the main part of the container in a closed state. [Figure 10] FIG. 4 is a cross-sectional view of the main part of the container, showing a state in which the lid is halfway opened. [Figure 11] FIG. 4 is a cross-sectional view of the main part of the container showing the closed state of the lid when the inner tray is not used. [Figure 12] FIG. 3 is a cross-sectional view showing the containers stacked one on top of the other. [Figure 13] FIG. 13 is an enlarged view of a main part of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A packaging container according to one embodiment of the present invention will be described below with reference to Figs. 1 to 13. Fig. 1 shows the overall configuration of the container in a separated state. The container can accommodate various foods. It is particularly suitable for take-out. In this embodiment, the container is circular in plan view, but the shape of the container in plan view is not limited, and may be rectangular in plan view.

[0015] The container comprises a main body 1, an inner plate 2, and a lid 3. The inner plate 2 is placed on top of the main body 1, and the lid 3 is placed on top of that. However, even if the inner plate 2 is not used, the same lid 3 can be used, and the lid 3 can be placed directly on the main body 1 for use.

[0016] The main body 1 is preferably made of paper, and in this embodiment, it is made of paper, but it may be made of synthetic resin. Both the inner plate 2 and the lid 3 are made of synthetic resin sheets, and are formed by various types of thermoforming (sheet forming) such as vacuum forming and compressed air forming. The synthetic resin sheets constituting the inner plate 2 and the lid 3 may be of the same type or different types. The synthetic resin sheets may be, for example, various synthetic resin sheets such as polyethylene terephthalate, polystyrene, polyolefins such as polypropylene and polyethylene, sheets filled with inorganic substances as the sheet materials, and even stretched sheets obtained by stretching these sheets. For example, sheets filled with inorganic substances in polypropylene with excellent heat resistance, and heat-resistant sheets obtained by stretching sheets such as polyethylene terephthalate, polystyrene, polypropylene, and polyethylene to improve heat resistance, may be used. A resin film may be laminated on one or both sides of these sheets. It is also preferable to use a sheet with excellent transparency, and it is particularly preferable for the lid 3. It is also preferable to use a heat-resistant sheet so that it can withstand heating by the microwave oven.

[0017] <Main unit 1> As shown in Figures 2 and 7, the main body 1 comprises a main body bottom portion 10, a main body side portion 11, a main body flange portion 12, and legs 13. The main body bottom portion 10 is circular in plan view and has a flat surface. The legs 13 are provided on the peripheral portion of the main body bottom portion 10. The legs 13 protrude downward from the peripheral portion of the main body bottom portion 10. The legs 13 go around the peripheral portion of the main body bottom portion 10, and therefore the legs 13 are annular. The legs 13 are continuous with the underside of the main body side portion 11, and the main body side portion 11 and the legs 13 form a continuous tapered shape.

[0018] As shown in Fig. 2, the main body 1 is composed of two paper sheets. The two paper sheets consist of a body sheet 14 and a bottom sheet 15. The body sheet 14 forms part of the leg portion 13, the main body side portion 11, and the main body flange portion 12. The bottom sheet 15 forms part of the leg portion 13 and the main body bottom portion 10. The bottom sheet 15 is circular, and its peripheral portion is folded downward around its entire circumference. The bottom sheet 15 has an annular downward fold portion 20 folded downward at its peripheral portion.

[0019] The body sheet 14 is formed into a tapered tubular shape by overlapping and bonding both ends in the longitudinal direction. Therefore, as shown in FIG. 1, the main body 1 has an overlapping portion 21 where the body sheets 14 are overlapped, formed at one location in the circumferential direction. The overlapping portion 21 extends in the vertical direction. The body sheet 14 has an outer piece portion 22 that overlaps the outer surface of the downwardly folded portion 20 of the bottom sheet 15, an inner piece portion 23 that is folded inwardly with respect to the outer piece portion 22 and overlaps the inner surface of the downwardly folded portion 20, and a connecting portion 24 that connects the outer piece portion 22 and the inner piece portion 23 in the inward and outward directions below the downwardly folded portion 20 of the bottom sheet 15. The outer piece portion 22 is bonded to the outer surface of the downwardly folded portion 20, and the inner piece portion 23 is bonded to the inner surface of the downwardly folded portion 20. Therefore, the leg portion 13 has a multi-layer structure in which three sheets are laminated.

[0020] The body side portion 11 extends upward from the peripheral edge of the body bottom portion 10. The body side portion 11 extends in a tapered shape so that the diameter increases toward the upper side. The body side portion 11 and the outer piece portion 22 of the leg portion 13 are continuous with each other.

[0021] The main body flange portion 12 is formed outward from the upper end portion of the main body side portion 11. The main body flange portion 12 is a curled portion. The main body flange portion 12 is formed by winding the upper end portion of the body sheet 14 into a cylindrical shape around the entire circumference.

[0022] <Middle plate 2> The middle plate 2 has a middle plate bottom surface portion 30, a middle plate side surface portion 31, and a middle plate flange portion 32. As shown in FIG. 7, the middle plate bottom surface portion 30 is smaller than the main body bottom surface portion 10 and has a small diameter. Various middle plate legs 33 may be provided on the peripheral portion of the middle plate bottom surface portion 30. The middle plate side surface portion 31 extends from the peripheral portion of the middle plate bottom surface portion 30 while expanding upward. A middle plate internal fitting portion 52 is formed at the upper end portion of the middle plate side surface portion 31. That is, the middle plate side surface portion 31 has, in order from the bottom, a middle plate side main portion 50, a middle plate extension portion 51, and a middle plate internal fitting portion 52.

[0023] The middle plate side main portion 50 occupies a large portion of the middle plate side portion 31 and is the main portion of the middle plate side portion 31. Various ribs may be formed on the middle plate side main portion 50. For example, vertical ribs extending in the up-down direction may be formed on the middle plate side main portion 50. The middle plate extension portion 51 extends approximately horizontally from the upper end portion of the middle plate side main portion 50 toward the outside. It is preferable that a middle plate protrusion 53 for preventing blocking is provided toward the outside at the upper end portion of the middle plate side main portion 50 to prevent blocking when the middle plates 2 are stacked on top of each other.

[0024] The inner plate fitting portion 52 extends upward from the outer edge of the inner plate extension portion 51. A inner plate lower chamfered portion 54 may be provided at the boundary between the inner plate extension portion 51 and the inner plate fitting portion 52. The inner plate fitting portion 52 may have various shapes, but in this embodiment, it has an inverted tapered shape that tapers inward toward the upper side. The inner plate fitting portion 52 may have a structure that combines, for example, a vertical portion that extends approximately vertically in the up-down direction with an uneven shape in the inward and outward directions. A inner plate upper chamfered portion 55 that expands outward may be provided at the boundary between the inner plate fitting portion 52 and the inner plate flange portion 32.

[0025] The middle plate flange portion 32 extends outward from the upper end of the middle plate internal fitting portion 52. The middle plate flange portion 32 has a middle plate flange top surface portion 56 (support surface portion) extending outwardly approximately horizontally from the upper end of the middle plate internal fitting portion 52, a middle plate skirt portion 57 extending while expanding downwardly from the outer edge portion of the middle plate flange top surface portion 56, a middle plate outer extension portion 58 extending outwardly approximately horizontally from the lower end portion of the middle plate skirt portion 57, a middle plate outer fitting portion 59 extending downwardly from the outer edge portion of the middle plate outer extension portion 58, and a middle plate edging portion 60 extending outwardly from the lower end portion of the middle plate outer fitting portion 59.

[0026] The middle dish flange top surface portion 56 is the uppermost portion of the middle dish flange portion 32, and is also the uppermost portion of the entire middle dish 2. In this embodiment, the middle dish skirt portion 57 is divided into upper and lower two stages via a step portion 61, but it may be a single stage without the step portion 61, or may have various other shapes.

[0027] The inner plate outer fitting portion 59 is fitted externally to the main body flange portion 12. The shape of the inner plate outer fitting portion 59 may be various, but in this embodiment, an inner plate locking protrusion 62 is formed on the lower end portion thereof facing inward. The inner plate locking protrusion 62 may be annular, but in this embodiment, a large number of inner plate locking protrusions 62 are provided at intervals in the circumferential direction. The inner plate locking protrusions 62 are engaged with the lower side of the main body flange portion 12. The inner plate outer fitting portion 59 is located outside and below the inner plate inner fitting portion 52. Note that, for example, in the case where the main body flange portion 12 is formed with a skirt portion having a reverse tapered shape that is inward toward the lower side, the inner plate outer fitting portion 59 may be reverse tapered.

[0028] The middle plate edging portion 60 has a middle plate inclined portion 63 that extends outward and downward from the lower end of the middle plate outer fitting portion 59, and a middle plate outer edge portion 64 that extends approximately horizontally outward from the lower end of the middle plate inclined portion 63. The middle plate outer edge portion 64 is the outermost portion of the middle plate 2 and constitutes the outer edge of the middle plate 2. The middle plate outer edge portion 64 may be located above the middle plate bottom portion 30.

[0029] In addition, it is preferable that an inner plate bulging portion 65 for venting air is provided from the inner plate outer extension portion 58 to the inner plate inclined portion 63 of the inner plate edging portion 60. The inner plate bulging portion 65 bulges upward at the inner plate outer extension portion 58, bulges outward at the inner plate outer fitting portion 59, and bulges upward at the inner plate inclined portion 63 of the inner plate edging portion 60. It is preferable that a plurality of inner plate bulging portions 65 are provided at intervals in the circumferential direction. In this embodiment, the inner plate bulging portions 65 are provided at four locations at 90 degree intervals. A plurality of inner plate locking projections 62 are formed between adjacent inner plate bulging portions 65, and in this embodiment, five inner plate locking projections 62 are arranged between adjacent inner plate bulging portions 65.

[0030] <Lid 3> The lid 3 comprises a top surface portion 70, a lid side surface portion 71, and a lid flange portion 72. An annular groove 73 is formed on the peripheral portion of the top surface portion 70, which divides the top surface portion 70 into two regions, an inner region and an outer region. The top surface portion 70 has a top surface main portion 74 located inside the annular groove 73 and constituting the main portion of the top surface portion 70, and a top surface outer circumferential portion 75 located outside the annular groove 73. The top surface main portion 74 is preferably a flat surface without any irregularities.

[0031] The lid 3 includes an inner wall portion 76 that extends and expands downward from the outer edge of the top surface main portion 74 and forms the inner wall surface of the annular groove 73, a lid extension portion 77 that extends approximately horizontally outward from the lower end of the inner wall portion 76 and forms the bottom surface of the annular groove 73, and a lid inner fitting portion 78 that extends upward from the outer edge of the lid extension portion 77 and forms the outer wall surface of the annular groove 73.

[0032] A lid lower chamfer 79 may be provided at the boundary between the lid extension 77 and the lid inner fitting 78. The shape of the lid inner fitting 78 may be various, but in this embodiment, it is an inverse tapered shape that tapers inward toward the upper side. That is, the lid inner fitting 78 may have the same shape as the inner plate inner fitting 52, or may have shapes corresponding to each other. The lid inner fitting 78 may have a structure that combines, for example, a vertical portion that extends approximately vertically in the up-down direction and an uneven shape in the inward and outward directions. A lid upper chamfer 80 that expands outward may be provided at the boundary between the lid inner fitting 78 and the top surface outer periphery 75. In this embodiment, as shown in Figs. 1 and 5, an inward protrusion 91 is provided at a predetermined position on the entire circumference of the lid inner fitting 78, but the inward protrusion 91 may be omitted.

[0033] The top surface outer peripheral portion 75 is preferably at the same height as the top surface main portion 74, and preferably forms the same plane. The top surface outer peripheral portion 75 is preferably formed with a stacking protrusion 81 that protrudes upward. The stacking protrusion 81 may be a protrusion extending along the circumferential direction. The stacking protrusion 81 may be annular, but in this embodiment, it is not formed in a part of the entire circumference, and is formed in a roughly C-shape in plan view. In this way, the stacking protrusion 81 does not have to be provided all around, and may be provided in a plurality of locations at intervals in the circumferential direction. In this embodiment, a label 82, for example, as shown by a two-dot chain line in FIG. 5, is attached to the area of ​​the entire circumference of the top surface outer peripheral portion 75 where the stacking protrusion 81 is not formed. The label 82 is attached from the top surface main portion 74 to the top surface outer peripheral portion 75 so as to straddle the annular groove 73.

[0034] The stacking protrusion 81 may be provided at a midway point or at a peripheral edge of the top surface outer periphery 75 in the inward / outward direction. In this embodiment, the stacking protrusion 81 is provided at a midway point of the top surface outer periphery 75 in the inward / outward direction, and therefore, in the region of the top surface outer periphery 75 where the stacking protrusion 81 is formed, the top surface outer periphery 75 is divided into a region inside the stacking protrusion 81 and a region outside the stacking protrusion 81. When containers with their lids closed are stacked one on top of the other, the legs 13 of the upper container are placed on the region inside the stacking protrusion 81 on the top surface outer periphery 75. The region inside the stacking protrusion 81 on the top surface outer periphery 75 is the leg placement surface portion 95 in this embodiment.

[0035] The lid side portion 71 extends downward from the periphery of the top surface portion 70. Various ribs may be formed on the lid side portion 71. The lid side portion 71 extends while gradually expanding downward. A lid protrusion 83 for preventing blocking may be provided on the inner surface of the lid side portion 71 in order to prevent the so-called blocking phenomenon in which the lids 3 are tightly fitted together and cannot be removed when a large number of lids 3 are stacked on top of each other. The lid protrusion 83 is formed over the entire length of the lid side portion 71 in the vertical direction, and therefore reaches the top surface portion 70. By forming the lid protrusion 83, the outer surface of the lid side portion 71 at the location where the lid protrusion 83 is formed becomes a recessed portion that is cut inward.

[0036] The lid flange portion 72 extends outward from the lower end of the lid side surface portion 71. The lid flange portion 72 is formed around the entire periphery on the outer side of the lid side surface portion 71. From the top, the lid flange portion 72 includes a lid outer extension portion 84, a lid outer fitting portion 85, and a lid edging portion 86. The lid outer extension portion 84 extends outward from the lower end of the lid side surface portion 71 approximately horizontally.

[0037] The lid outer fitting portion 85 extends downward from the outer edge of the lid outer extension portion 84. The lid outer fitting portion 85 fits externally to the main body flange portion 12 when the inner plate 2 is not used. The shape of the lid outer fitting portion 85 may be various, but in this embodiment, a lid locking protrusion 87 is formed on the lower end portion of the lid outer fitting portion 85 facing inward. The lid locking protrusion 87 may be annular, but in this embodiment, a large number of lid locking protrusions are provided at intervals in the circumferential direction. The lid locking protrusions 87 lock onto the lower side of the main body flange portion 12. The lid outer fitting portion 85 is located outside and below the lid inner fitting portion 78. The lid outer fitting portion 85 may have the same shape as the inner plate outer fitting portion 59. For example, when the main body flange portion 12 is formed with a skirt portion having a reverse tapered shape that is inward toward the lower side, the lid outer fitting portion 85 may have a reverse tapered shape.

[0038] The lid edging portion 86 has a lid inclined portion 88 that extends at an outward and downward incline from the lower end of the lid outer fitting portion 85, and a lid outer edge portion 89 that extends approximately horizontally outward from the lower end of the lid inclined portion 88. The lid outer edge portion 89 is the outermost portion of the lid 3 and constitutes the outer edge of the lid 3 itself. The lid outer edge portion 89 is located outer and lower than the lid inner fitting portion 78. The lid outer edge portion 89 is also the lowest portion of the lid 3.

[0039] In addition, it is preferable that a lid bulge 90 for venting air is provided from the lid outer extension 84 to the lid inclined portion 88 of the lid border 86. The lid bulge 90 bulges upward at the lid outer extension 84, bulges outward at the lid outer fitting portion 85, and bulges upward at the lid inclined portion 88 of the lid border 86. It is preferable that a plurality of lid bulges 90 are provided at intervals in the circumferential direction. In this embodiment, the lid bulge 90 is provided at four locations at 90 degree intervals. A plurality of lid locking projections 87 are formed between adjacent lid bulges 90, and in this embodiment, five lid locking projections 87 are arranged between adjacent lid bulges 90. The lid border 86 may have the same configuration as the inner plate border 60. In this embodiment, the diameter of the lid outer edge portion 89 is approximately the same as the diameter of the inner plate outer edge portion 64, but may be different from the diameter of the inner plate outer edge portion 64. However, the diameter of the lid outer edge portion 89 is preferably equal to or greater than the diameter of the inner plate outer edge portion 64. The same applies when the container is non-circular, and it is preferable that the lid outer edge portion 89 be the same size as or larger than the inner plate outer edge portion 64.

[0040] The lid outer edge 89 and the inner plate outer edge 64 may have a number of extremely fine projections and recesses formed thereon to reinforce the lid outer edge 89 and the inner plate outer edge 64 and to prevent fingers from being cut when the lid outer edge 89 and the inner plate outer edge 64 are touched. The projections and recesses may be formed only on the outer edge of the lid outer edge 89 and the inner plate outer edge 64, or may be formed over the entire width of the lid outer edge 89 and the inner plate outer edge 64. The projections and recesses are wavy when viewed enlarged from the front, and the direction of the numerous peaks and valleys is along the inside-outside direction of the container. The projections and recesses are formed by knurling such as flat knurling or twill knurling, and preferably by twill knurling to prevent slipping. The inner plate outer edge 64 and the lid outer edge 89 may have a knob.

[0041] <When using inner plate 2> For example, taking a bowl of rice such as a tempura bowl as an example, first, rice, which is the first food ingredient, is placed in the main body 1. After that, the inner plate 2 is placed on the main body 1 to cover the opening of the main body 1. The inner plate 2 is externally fitted to the main body 1. That is, the inner plate external fitting portion 59 is externally fitted to the main body flange portion 12. The second food ingredient, such as tempura, is placed on the inner plate 2. After that, the lid 3 is placed on the inner plate 2 to cover the opening of the inner plate 2 with the lid 3. The lid 3 is internally fitted to the inner plate 2. That is, the lid internal fitting portion 78 is internally fitted to the inner plate internal fitting portion 52.

[0042] Fig. 7 shows the lid closed state when the inner tray 2 is used, Fig. 8 shows the lid open state of the main part when the inner tray 2 is used, and Fig. 9 shows the lid closed state of the main part when the inner tray 2 is used.

[0043] In the closed state with the inner plate 2 in use, the inner plate bottom surface portion 30 is spaced upward from the main body bottom surface portion 10. Rice is contained in the space between the inner plate bottom surface portion 30 and the main body bottom surface portion 10. The inner plate bottom surface portion 30 is located below the main body flange portion 12. The inner plate inner fitting portion 52 is located above and inside the main body flange portion 12. The inner plate flange top surface portion 56 is located above and inside the main body flange portion 12. The inner plate outer extension portion 58 abuts against the main body flange portion 12 from above. Since the inner plate outer extension portion 58 abuts against the main body flange portion 12 from above, a large force can be applied from above to the inner plate 2, and the inner plate outer fitting portion 59 can be firmly fitted to the main body flange portion 12. In addition, because the main body flange portion 12 has a curled shape, even if a large downward force acts on the main body flange portion 12 when the inner plate 2 is externally fitted to the main body 1, the main body flange portion 12 is less likely to deform, and the main body flange portion 12 can firmly absorb the downward force. Then, the inner plate outer extension portion 58 abuts against the upper surface of the main body flange portion 12, thereby determining the vertical position of the inner plate 2 relative to the main body 1, i.e., the height of the inner plate 2.

[0044] The top surface main portion 74 of the lid 3 is spaced upward from the inner plate bottom surface portion 30. Tempura is accommodated in the space between the top surface main portion 74 and the inner plate bottom surface portion 30. The lid extension portion 77 abuts against the upper surface of the inner plate extension portion 51, the lid internal fitting portion 78 is internally fitted into the inner plate internal fitting portion 52, and the top surface outer periphery portion 75 abuts against the upper surface of the inner plate flange top surface portion 56. In particular, the area of ​​the top surface outer periphery portion 75 that is inside the stacking protrusion 81 abuts against the upper surface of the inner plate flange top surface portion 56. As described above, the annular area of ​​the top surface outer periphery portion 75 that is inside the stacking protrusion 81 is the foot placement surface portion 95. The foot placement surface portion 95 of the lid 3 overlaps on the inner plate flange top surface portion 56. The inner plate flange top surface portion 56 supports the foot placement surface portion 95 from below. Therefore, the inner plate flange top surface 56 is a support surface portion that supports the foot placement surface portion 95 from below. In this manner, in the closed lid state, the foot placement surface portion 95 of the lid 3 and the inner plate flange top surface portion 56 overlap each other vertically to form a double structure. The lid extension portion 77 may be spaced upward from the upper surface of the inner plate extension portion 51.

[0045] The lid outer fitting portion 85 is spaced upward from the main body flange portion 12. That is, the lid outer fitting portion 85 is in a state of being retracted upward from the main body flange portion 12. In addition, the lid outer fitting portion 85 is spaced upward from the inner plate outer fitting portion 59. Therefore, the lid outer fitting portion 85 does not interfere with the outer fitting between the inner plate outer fitting portion 59 and the main body flange portion 12.

[0046] In the closed state, the lid outer edge 89 is spaced a predetermined distance above the inner plate outer edge 64. The vertical distance between the lid outer edge 89 and the inner plate outer edge 64 is preferably at least large enough to allow the tip of a finger to fit between them. As shown in Figure 9, for example, an index finger can be inserted between the lid outer edge 89 and the inner plate outer edge 64 to hook the index finger against the underside of the lid outer edge 89. Then, the lid 3 can be removed from this state.

[0047] 10 shows the state in the middle of removing the lid 3 from the inner plate 2. For example, one hand holds the main body side portion 11, and the fingertips of the other hand lift the lid outer edge portion 89 upward. Since the lid outer edge portion 89 is separated upward from the inner plate outer edge portion 64, the fingers can be easily hooked only on the lid outer edge portion 89 without catching the fingers on the inner plate outer edge portion 64. Also, since the inner plate outer edge portion 64 is exposed and not covered from the outside by the lid 3, only the lid outer edge portion 89 can be easily lifted upward with the fingertips. Even if the lid outer edge portion 89 is lifted upward, the inner plate outer fitting portion 59 is not affected, and the inner plate outer fitting portion 59 remains in a state of being externally fitted to the main body flange portion 12.

[0048] By such a lid opening operation, the lid flange portion 72 is partially rotated upward, for example, with the lid extension portion 77 as a fulcrum. As a result, the internal fitting state between the lid internal fitting portion 78 and the inner plate internal fitting portion 52 is locally released. Since the lid outer edge portion 89 is located outside the lid internal fitting portion 78 and located below the lid internal fitting portion 78, the distance from the lid internal fitting portion 78 to the lid outer edge portion 89 is long. Therefore, by applying a force to the lid outer edge portion 89, an inward moment can be easily applied to the lid internal fitting portion 78. Therefore, the lid internal fitting portion 78 can be easily separated inward from the inner plate internal fitting portion 52, and the internal fitting state between the lid 3 and the inner plate 2 can be easily released. Then, only the lid 3 can be easily removed from the inner plate 2 while the inner plate 2 is still covering the main body 1.

[0049] <When not using inner tray 2> Fig. 11 shows the lid closed state when the inner plate 2 is not used. Even when the inner plate 2 is not used, the same lid 3 can be used as is without preparing a separate lid 3. That is, by externally fitting the lid outer fitting portion 85 to the main body flange portion 12, the opening of the main body 1 can be closed with the lid 3 without using the inner plate 2. This type of usage is suitable for applications such as a seafood bowl, where the two ingredients do not need to be separated.

[0050] <Containers stacked one on top of the other> 12 and 13 show containers with their lids closed stacked one on top of the other when using the inner tray 2. The legs 13 of the body 1 of the upper container are placed on the leg support surface 95 of the lid 3 of the lower container. When a label 82 is attached, a part of the circumference of the legs 13 is placed on the label 82. The stacking protrusions 81 protrude upward from the outer side of the leg support surface 95, preventing the upper container from shifting sideways relative to the lower container and maintaining a stable stacked state.

[0051] Furthermore, the inner plate flange top surface 56 overlaps the underside of the leg support surface 95 of the lid 3, and the leg support surface 95 is supported from below by the inner plate flange top surface 56. Therefore, the weight of the upper container acting on the leg support surface 95 can be received by the double structure of the leg support surface 95 and the inner plate flange top surface 56. Therefore, the upper container can be stably supported, and the stacked state is stable.

[0052] Furthermore, the lid internal fitting portion 78 is located immediately inside the leg support surface portion 95, and the inner plate internal fitting portion 52 is located immediately inside the inner plate flange top surface portion 56. Therefore, the load acting on the leg support surface portion 95 and the inner plate flange top surface portion 56 can also be supported by the lid internal fitting portion 78 and the inner plate internal fitting portion 52. [Explanation of symbols]

[0053] 1 Main unit 2 Medium Plate 3 Lid 10 Bottom of the main unit 11 Side of the main body 12 Body flange 13 Legs 14 Torso sheet 15 Bottom sheet 20 Downward bend 21 Overlapped section 22 Outer part 23 Inner piece 24 Connecting part 30 Bottom of medium plate 31 Side part of middle plate 32 Center plate flange 33 Middle plate leg 50 Main part of the side of the inner plate 51 Middle plate extension 52 Inner plate fitting part 53 Inner plate protrusion 54 Chamfered bottom of inner plate 55 Chamfered top of inner plate 56 Top part of middle plate flange (support surface part) 57 Middle plate skirt part 58 Middle plate outer extension part 59 Inner plate outer fitting part 60 Inner plate edge 61 Step 62 Inner plate locking protrusion 63 Slanted part of middle plate 64 Outer edge of inner plate 65 Middle plate bulge 70 Top section 71 Lid side part 72 Lid flange 73 Circular Groove 74 Top surface main part 75 Top periphery 76 Inner wall 77 Lid extension 78 Lid inner fitting part 79 Chamfered part under the lid 80 Lid top chamfer 81 Stacking protrusion 82 Label 83 Lid protrusion 84 Lid external extension 85 Lid outer fitting part 86 Lid edge 87 Lid locking protrusion 88 Lid slope 89 Outer edge of lid 90 Lid bulge 91 Inward protrusion 95 Leg placement surface

Claims

1. A packaging container comprising a main body, an inner plate that is placed on the main body, and a lid that is placed on the inner plate, The main body includes a main body bottom portion, a main body side portion, and a main body flange portion; The inner plate includes an inner plate internal fitting portion and an inner plate external fitting portion that is externally fitted to the main body flange portion, The lid is a packaging container having a lid internal fitting portion that internally fits into the inner plate internal fitting portion, and a lid external fitting portion that externally fits into the main body flange portion when the inner plate is not attached to the main body.

2. A packaging container as described in claim 1, wherein when the inner plate external fitting portion is externally fitted to the main body flange portion and the lid internal fitting portion is internally fitted to the inner plate internal fitting portion, the outer edge portion of the lid is located above and spaced apart from the outer edge portion of the inner plate and is located outside and below the lid internal fitting portion.

3. The main body is provided with legs protruding downward from the periphery of the bottom surface of the main body, The inner plate has a support surface portion on the outer side of the inner plate inner fitting portion, The lid is provided on the outside of the lid inner fitting portion and includes a foot support surface portion that overlaps the upper side of the support surface portion when the lid is attached to the inner tray, and a stacking protrusion that is provided on the outside of the foot support surface portion and protrudes upward, 3. A packaging container as claimed in claim 1 or 2, wherein when containers each having an inner tray attached to a main body and a lid attached to the inner tray are stacked one on top of the other, the legs of the upper container are placed on the leg support surface of the lower container and engage with the inside of the stacking protrusion.

4. 3. The packaging container according to claim 1, wherein the body is made of paper.

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