Food packaging containers

Abstract

This makes it difficult for the inner tray and lid to detach from the main container body. [Solution] A food packaging container 10 comprising a container body 20, an inner tray 30 fitted into the container body 20, and a lid 40 fitted into the inner tray 30, wherein the inner tray 30 has an inner surface 33d of an inner tray protrusion 33 which is a fitting portion with the lid 40. The top 33e of the outer surface 33c, which is the back of the inner surface 33d, presses against the inner wall surface 22a of the side wall portion 22 of the container body 20.

Description

Technical Field

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[0001] The present invention relates to a container for food packaging.

Background Art

[0002] Patent Document 1 discloses a food packaging container including a container body, a middle plate fitted to the container body, and a lid fitted to the middle plate.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the food packaging container described in Patent Document 1, when the container body is held by hand, an inward force is applied to the side surface of the container body, so there is a problem that the middle plate and / or the lid is likely to come off from the container body.

Means for Solving the Problems

[0005] A food packaging container for solving the above problems is a food packaging container including a container body, a middle plate fitted to the container body, and a lid fitted to the middle plate, wherein a fitting portion between the lid and the middle plate is composed of a recess formed in the middle plate and recessed outward and a protrusion formed in the lid and protruding outward, and the middle plate is a food packaging container in which at least a part of the back of the recess presses the container body.

[0006] Furthermore, the inner tray is externally fitted to the container body, the lid is internally fitted to the inner tray, the inner tray has an inner tray protrusion having an inner surface that is concave outward, the lid has a lid protrusion having an outer surface that is convex outward, the concave part is the inner surface of the inner tray protrusion, the protrusion is the outer surface of the lid protrusion, and at least a part of the back of the inner surface of the inner tray protrusion presses against the inner surface of the container body.

[0007] Furthermore, the lid and the inner tray are made of a non-foamed resin material, while the container body is made of a foamed resin material. [Effects of the Invention]

[0008] According to the present invention, it is possible to make it difficult for the inner tray and / or lid to detach from the container body. [Brief explanation of the drawing]

[0009] [Figure 1] An exploded perspective view of a food packaging container. [Figure 2] Cross-sectional view of a food packaging container. [Figure 3] A partial cross-sectional view of the container body. [Figure 4] A cross-sectional view of the inner tray. [Figure 5] Figure 5(a) shows the container body before the inner tray is fitted into it, and Figure 5(b) shows a partial cross-sectional view of the container body with the inner tray fitted into it. [Figure 6] A partial cross-sectional view of the lid. [Figure 7] A partial cross-sectional view showing the lid fitted onto the inner tray. [Figure 8] A partial cross-sectional view showing the container body, inner tray, and lid fitted together. [Modes for carrying out the invention]

[0010] Hereinafter, an embodiment of the food packaging container 10 embodying the present invention will be described with reference to Figures 1 to 8. Note that, with respect to the food packaging container 10 and its constituent members, the vertical direction refers to the direction perpendicular to the installation surface on which the food packaging container 10 is placed. Furthermore, "inside" and "outside" refer to the inner side (inner) of the food packaging container 10 when it is installed, and the opposite side (outer) of that side.

[0011] Figure 1 shows an exploded perspective view of a food packaging container 10. As shown in the figure, the food packaging container 10 comprises, from bottom to top in the figure, a container body 20, an inner tray 30 that can be fitted into the container body 20, and a lid 40 that can be fitted into the inner tray 30.

[0012] Figure 2 shows a cross-sectional view of the food packaging container 10. As shown in the figure, the food packaging container 10 has a lower space 10A where food can be stored between the container body 20 and the inner tray 30. In addition, an upper space 10B where food can be stored is formed between the inner tray 30 and the lid 40. Thus, the food packaging container 10 has two independent storage spaces, the lower space 10A and the upper space 10B. For example, when the food packaging container 10 is used as a container for noodles such as ramen, udon, or soba, a bag containing liquid soup can be stored in the lower space 10A, and the noodles and toppings can be stored in the upper space 10B. As another example, nothing can be stored in the lower space 10A, and katsudon (pork cutlet rice bowl) or tempura rice bowl (tempura rice bowl) can be stored in the upper space 10B.

[0013] Next, the container body 20 will be described based on Figures 1 to 3. The container body 20 has an overall box shape with a bottom and an open top. The container body 20 is equipped with a bottom wall portion 21 and side wall portions 22.

[0014] As shown in FIGS. 1 to 3, the bottom wall portion 21 includes a pedestal 23 that is recessed downward and a bottom wall 24 that is raised above the pedestal 23 on the inner side surrounded by the pedestal 23. In one example, the bottom wall portion 21 is rectangular when viewed from above. The shape of the bottom wall portion 21 may be square, circular, elliptical, or the like. The pedestal 23 is formed in a square frame shape when viewed from above. The pedestal 23 is located protruding downward from the bottom wall 24. The pedestal 23 serves as a base (raised platform) that contacts the installation surface when the container body 20 and the food packaging container 10 using the same are installed.

[0015] As shown in FIG. 3, the side wall portion 22 extends upward surrounding the outer edge of the bottom wall portion 21. The side wall portion 22 has an inverted conical shape of a rectangle that slopes outward upward. Further, the upper part of the side wall portion 22 is a flange portion 25 that faces outward. The flange portion 25 is formed in a convex shape with a cross-section convex outward. The flange portion 25 includes an upper surface 25a facing upward, an outer end surface 25b that is the outer end surface, and a lower surface 25c facing downward. The outer surface formed by the upper surface 25a, the outer end surface 25b, and the lower surface 25c of the flange portion 25 is a fitting portion with the middle dish 30 in the container body 20. The container body 20 is integrally formed by a known thermoforming method such as vacuum pressure air forming using a foamed resin material (sheet), for example, foamed polystyrene.

[0016] Next, the middle dish 30 will be described based on FIGS. 1, 2, 4, and 5. The middle dish 30 has a box shape with a bottom and an open top as a whole shape. The middle dish 30 includes a middle dish bottom portion 31, a middle dish wall portion 32, a middle dish convex portion 33, and a middle dish frame portion 34.

[0017] The middle dish bottom portion 31 is octagonal when viewed from above. Specifically, it is based on a rectangle and forms an octagon by connecting four corners of the rectangle with straight lines obliquely. In the following, regarding the configuration of the middle dish 30, the obliquely straight portions will also be referred to as hypotenuses. The shape of the middle dish bottom portion 31 is not particularly limited and may be rectangular, square, circular, elliptical, or the like.

[0018] The middle dish wall portion 32 extends upward surrounding the outer edge of the middle dish bottom portion 31. The middle dish wall portion 32 is inclined outward upward and is formed in an inverted conical shape of an octagon. The upper portion of the middle dish wall portion 32 is a stepped portion 32a that spreads outward stepwise.

[0019] The middle dish convex portion 33 extends upward surrounding the upper edge of the middle dish wall portion 32 (step portion 32a) and forms an octagonal frame shape when viewed from above. As shown in FIG. 4, the middle dish convex portion 33 includes a lower portion 33a that is inclined outward upward and an upper portion 33b that is continuously formed on the upper edge of the lower portion 33a and is inclined inward upward. Therefore, the cross-sectional shape of the middle dish convex portion 33 is in a shape of "inverted <" (the position shown in FIG. 4) or a shape of "<" (the position opposite to FIG. 4).

[0020] The middle dish convex portion 33 is such that due to the lower portion 33a and the upper portion 33b, the outer surface 33c is a convex portion protruding outward, and the inner surface 33d is a concave portion recessed outward. The inner surface 33d of the middle dish convex portion 33 is a concave portion that is a fitting portion with the lid body 40 in the middle dish 30. Also, the outer surface 33c of the middle dish convex portion 33 constitutes a convex portion that is the back of the concave portion. The back of the inner surface 33d of the middle dish convex portion 33 is the outer surface 33c. The middle dish convex portion 33 is formed with a certain thickness. For this reason, the outer surface 33c and the inner surface 33d of the middle dish convex portion 33 are parallel. Also, in the middle dish convex portion 33, the boundary portion between the lower portion 33a and the upper portion 33b becomes the top portion 33e that is located most outward in the outer surface 33c that is a convex portion and the bottom portion 33f that is located most outward in the inner surface 33d that is a concave portion.

[0021] Next, based on FIG. 5(b), the state where the middle dish 30 is fitted into the container body 20 will be described. Note that FIG. 5(a) shows the state before the middle dish 30 is fitted into the container body 20, and is a view showing that the side wall portion 22 of the container body 20 is deformed with respect to FIG. 5(b) showing the state where the two are fitted.

[0022] Specifically, the side wall portion 22 shown as a two-dot chain line in FIG. 5(b) is the side wall portion 22 shown by a solid line in FIG. 5(a) before fitting. The following describes the state in which the inner tray 30 is fitted into the container body 20 as shown in Figure 5(b). When the inner tray 30 is fitted into the container body 20, the top 33e of the outer surface 33c of the inner tray projection 33 abuts against the inner wall surface 22a of the side wall portion 22 of the container body 20 and presses the inner wall surface 22a of the side wall portion 22 outward. The lower end of the side wall portion 22 of the container body 20 is connected to the bottom wall portion 21, and the upper end is an open end. Therefore, the outward pressing force acting on the side wall portion 22 causes the upper part of the side wall portion 22 to elastically deform outward. Specifically, the side wall portion 22 shown by the solid line in Figure 5(a) and the dashed line in Figure 5(b) is pressed by the top 33e of the outer surface 33c of the inner tray projection 33 and deforms outward to the position shown by the solid line in Figure 5(b). Although not specifically shown in the diagram, the top portion 33e formed on the slanted side (diagonal straight portion) of the central plate protrusion 33 does not come into contact with the inner wall surface 22a of the opposing side wall portion 22 because the shapes of the side wall portions 22 are different.

[0023] As shown in Figure 4, the inner tray frame portion 34 extends outward, surrounding the upper edge of the inner tray protrusion portion 33. The inner tray frame portion 34 comprises an upper surface portion 35, a frame wall portion 36, and a latching portion 37. As shown in Figures 1 and 4, the upper surface portion 35 is formed continuously from the central plate projection portion 33. The inner edge of the upper surface portion 35 is octagonal when viewed from above, while the outer edge is square.

[0024] As shown in Figure 5(b), the upper surface portion 35 is capable of covering the upper surface 25a of the flange portion 25 of the container body 20 from above when the inner tray 30 is fitted into the container body 20. The upper surface portion 35 has ridge-like portions 35a that rise upward in accordance with the shape of the upper surface 25a of the flange portion 25, and these ridge-like portions 35b abut against the upper surface 25a of the flange portion 25 all the way around. This seals the lower space 10A formed between the container body 20 and the inner tray 30.

[0025] As shown in Figures 4 and 5(b), the frame wall portion 36 extends downward, surrounding the outer edge of the upper surface portion 35. The frame wall portion 36 has a rectangular cylindrical shape when viewed from above. The frame wall portion 36 is formed to surround the entire circumference of the outer end surface 25b of the flange portion 25 from the outside when the inner tray 30 is fitted into the container body 20.

[0026] As shown in Figures 1, 4, and 5, the frame wall portion 36 is provided with inwardly projecting latching portions 37 on both sides of each corner. The latching portions 37 are formed in a position opposite to the upper part 33b of the inner tray protrusion 33. Each latching portion 37 is formed to fit into the lower surface 25c side of the flange portion 25 when the inner tray 30 is fitted into the container body 20. When the inner tray 30 is attached to the container body 20, the frame wall portion 36 of the inner tray 30 covers the outer end surface 25b of the flange portion 25 of the container body 20, and the latching portions 37 extend beyond the outer end surface 25b of the flange portion 25 into the lower surface 25c side. As a result, the inner tray 30 is externally fitted to the container body 20. As shown in Figure 5(b), the inner surface of the inner tray frame portion 34, that is, the upper surface portion 35, the frame wall portion 36, and the inner surface of the latching portions 37, are concave in cross-section, with the cross-section being concave outward. The inner surface of the inner tray frame 34 fits onto the outer surface of the flange 25. The inner surface of the inner tray frame 34 becomes the fitting portion of the inner tray 30 with the container body 20.

[0027] The inner tray 30 is integrally molded from a non-foamed resin material (sheet), such as polypropylene with a filler, by a known thermoforming method such as vacuum pressure forming. Talc is one example of a filler that can be used.

[0028] Next, the lid 40 will be described based on Figures 1, 2, 6, and 7. The lid 40 has a box-like shape with a top and an open bottom. As shown in Figures 1, 2, and 6, the lid 40 comprises a cover portion 41, a lid protrusion 42, and a lid flange portion 43.

[0029] The cover portion 41 comprises a cover portion body 41a and a connecting portion 41b. The cover portion body 41a has a ceiling and is shaped like an octagonal truncated pyramid with an open bottom. The connecting portion 41b surrounds the lower edge of the cover portion body 41a and extends outward, forming an octagonal frame shape when viewed from above.

[0030] The lid projection 42 surrounds the outer edge of the cover portion 41 (connecting portion 41b) and extends upward, forming an octagonal frame shape when viewed from above. As shown in Figure 6, the lid projection 42 comprises a lower part 42a that slopes outward toward upward, and an upper part 42b that is formed continuously with the upper edge of the lower part 42a and slopes inward toward upward. Therefore, the cross-sectional shape of the lid projection 42 is an inverted "L" shape (as shown in Figure 6) or a "L" shape (as shown in the opposite position to Figure 6).

[0031] The lid projection 42 is formed by a lower part 42a and an upper part 42b, with the outer surface 42c being a projection that protrudes outward and the inner surface 42d being a recess that is indented outward. The outer surface 42c of the lid projection 42 is the projection that fits with the inner tray 30 on the lid 40. The lid projection 42 is formed to a constant thickness. Therefore, the outer surface 42c and the inner surface 42d of the lid projection 42 are parallel. Furthermore, the boundary portion of the lid projection 42 between the lower part 42a and the upper part 42b is the outermost "V" shaped top 42e on the outer surface 42c, which is a projection, and the outermost "inverted V" shaped bottom 42f on the inner surface 42d, which is a recess.

[0032] The lid protrusion 42 is formed in a shape similar to the inner tray protrusion 33. Specifically, the vertical lengths of the lower 42a and upper 42b of the lid projection 42 are the same as the vertical lengths of the lower 33a and upper 33b of the inner tray projection 33. Furthermore, when the inner tray 30 and the lid 40 are placed on a flat reference surface, the inclination angles of the lower 42a and upper 42b of the lid projection 42 with respect to the reference surface are the same as the inclination angles of the lower 33a and upper 33b of the inner tray projection 33 with respect to the reference surface. The lid projection 42 is formed on the lid 40 so as to be positioned slightly inward from the inner tray projection 33 by a length slightly shorter than the thickness of the inner tray projection 33.

[0033] As shown in Figure 7, when the lid 40 is fitted onto the inner tray 30, the bottom 33f of the inner surface 33d of the inner tray protrusion 33 overlaps with the top 42e of the outer surface 42c of the lid protrusion 42, and the outer surface 42c of the lid protrusion 42 and the inner surface 33d of the inner tray protrusion 33 are in surface contact around the entire circumference. As a result, the lid 40 fits internally onto the inner tray 30, and the upper space 10B formed between them is sealed.

[0034] The lid flange portion 43 extends outward, surrounding the upper edge of the lid projection portion 42, and its outer edge is bent downward. The inner edge is octagonal when viewed from above, while the outer edge is square. The lid flange portion 43 covers the upper surface portion 35 of the inner tray 30 from above and can be locked into the corner between the upper surface portion 35 and the frame wall portion 36.

[0035] The lid 40 is integrally molded from a non-foamed resin material (sheet), such as transparent polyethylene terephthalate, by a known thermoforming method such as vacuum pressure forming. Regarding the fitting of food packaging containers 10 The following describes how to assemble the container body 20, the inner tray 30, and the lid 40 to form a food packaging container 10, and the assembled state.

[0036] Regarding the fitting of the container body 20 and the inner tray 30 As shown in Figure 5(a), the side wall portion 22 of the container body 20 is located inward (towards the left in the figure) before the inner tray 30 is fitted into the container body 20.

[0037] When the inner tray 30 is placed on top of the container body 20, the top portion 33e of the inner tray's protrusion 33 presses against the inner wall surface 22a of the side wall portion 22 of the container body 20, and elastically deforms the upper part of the side wall portion 22 outward. As a result, the flange portion 25 formed on the side wall portion 22 also elastically deforms outward. Note that the side wall portion 22 shown by the dashed line in Figure 5(b) is in the same position as the side wall portion 22 shown by the solid line in Figure 5(a).

[0038] As shown in Figure 5(b), when the flange portion 25 is elastically deformed outward, the upper surface 35 and frame wall portion 36 of the inner tray frame portion 34 of the inner tray 30 cover the upper surface 25a and outer end surface 25b of the flange portion 25 of the container body 20, respectively. Furthermore, each latching portion 37 formed on the frame wall portion 36 extends beyond the outer end surface 25b of the flange portion 25 and enters the lower surface 25c side of the flange portion 25.

[0039] The flange portion 25 of the container body 20 is surrounded on its outer circumference by the upper surface portion 35, frame wall portion 36, and latch portion 37 of the inner tray frame portion 34 of the inner tray 30, and is sandwiched from above and below. As a result, the inner tray 30 is externally fitted to the container body 20. In this state, the upper surface 25a of the flange portion 25 abuts against the lower surface 35b of the ridged portion 35a of the upper surface portion 35 of the inner tray frame portion 34.

[0040] Regarding the fitting of the lid 40 to the fitting assembly of the container body 20 and the inner tray 30. As shown in Figure 8, when the lid 40 is placed over the fitted assembly of the container body 20 and the inner tray 30, the top 42e of the lid projection 42 of the lid 40 moves downward beyond the upper edge 33b of the inner tray projection 33 of the inner tray 30. As a result, as shown in the figure, the top 42e of the outer surface 42c of the lid projection 42 is positioned at the bottom 33f of the inner surface 33d of the inner tray projection 33, and the outer surface 42c of the lid projection 42 makes surface contact with the inner surface 33d of the inner tray projection 33 around its entire circumference. This causes the lid 40 to fit inside the inner tray 30. The container body 20, inner tray 30, and lid 40 are then fitted together to form a food packaging container 10.

[0041] According to the food packaging container 10 of the above embodiment, the following effects can be obtained. (1) In the above embodiment, the food packaging container 10 comprises a container body 20, an inner tray 30 that fits into the container body 20, and a lid 40 that fits into the inner tray 30. The fitting portion between the container body 20 and the inner tray 30 consists of the outer surface (upper surface 25a, outer end surface 25b, and lower surface 25c) of the flange portion 25 of the container body 20 and the inner surface of the inner tray frame portion 34 (upper surface portion 35, frame wall portion 36, and latch portion 37) of the inner tray 30. The fitting portion between the inner tray 30 and the lid 40 consists of the inner surface 33d that forms the recess of the inner tray protrusion 33 of the inner tray 30 and the outer surface 42c that forms the protrusion of the lid protrusion 42 of the lid 40.

[0042] Therefore, the food packaging container 10 can be constructed by fitting the container body 20 with the inner tray 30, and fitting the inner tray 30 with the lid 40. (2) At the inner tray 30, the outer surface 33c, which is the back of the inner surface 33d (recess) that engages with the lid 40, is a convex portion that protrudes outward. The outermost apex 33e of the outer surface 33c presses against the inner wall surface 22a of the side wall portion 22 of the container body 20. At least a part (apex 33e) of the back (outer surface 33c) of the engaging portion (inner surface 33d) of the inner tray 30 presses against the container body 20. At the point where the inner tray 30 presses against the container body 20, friction due to line contact makes it difficult for the two to separate. For this reason, even if an inward force is applied to the side of the container body 20 when the container body 20 is held in the hand, friction due to line contact at the point where the inner tray 30 presses against the container body 20 makes it difficult for the inner tray 30 and / or the lid 40 to separate from the container body 20.

[0043] (3) The inner tray 30 and the container body 20 are configured such that the inner tray frame portion 34 of the inner tray 30 is externally fitted onto the flange portion 25 of the container body 20. When the top portion 33e of the inner tray 30 presses against the inner wall surface 22a of the side wall portion 22 of the container body 20, the flange portion 25 is elastically deformed outward. This outward elastic deformation of the flange portion 25 causes the flange portion 25 of the container body 20 to move in a direction that fits more tightly with the inner tray frame portion 34 of the inner tray 30, making it difficult for the container body 20 and the inner tray 30 to come apart.

[0044] (4) When an inward load is applied to the side wall portion 22 of the container body 20, the top portion 33e of the inner tray protrusion 33 presses against the inner wall surface 22a of the side wall portion 22 of the container body 20, thereby restricting the inward movement of the side wall portion 22.

[0045] (5) Furthermore, if the lid projection 42 is formed in a similar shape to the inner tray projection 33, the synergistic effect of the lid 40 and the inner tray 30 will cause an even greater outward force to be applied to the inner wall surface 22a of the side wall portion 22 of the container body 20 from the top 42e of the lid projection 42 and the top 33e of the inner tray projection 33. For this reason, it is considered that the inner tray 30 and / or the lid 40 will be even less likely to come off the container body 20.

[0046] (6) In addition, the top 42e of the lid projection 42 and the top 33e of the inner tray projection 33 protrude outward. The top 42e of the lid projection 42 contacts the inner wall surface 22a of the side wall portion 22 of the container body 20. As a result, an outward pushing force is concentrated on the inner wall surface 22a, making it even more difficult for the inner tray 30 and / or the lid 40 to come off the container body 20.

[0047] (7) The lid 40 and inner tray 30 are integrally molded from a non-foamed resin material (sheet), and the container body 20 is integrally molded from a foamed resin material (sheet) using a known thermoforming method such as vacuum pressure forming. Since the non-foamed resin material (sheet) does not have air bubbles (voids), it is harder than the foamed resin material (sheet) which has air bubbles (voids). The force with which the lid 40 and inner tray 30, made of the non-foamed resin material (sheet), press against the container body 20, made of the foamed resin material (sheet), is considered to be greater, and the lid 40 and inner tray 30 exert an outward pushing force on the container body 20.

[0048] (8) When the inner tray 30 and the lid 40 are fitted together, the outer surface 42c of the lid projection 42 makes surface contact with the inner surface 33d of the inner tray projection 33 over its entire circumference. As a result, the upper space 10B formed between the inner tray 30 and the lid 40 can be sealed.

[0049] (9) When the container body 20 and the inner tray 30 are fitted together, the lower surface 35b of the ridged portion 35a of the upper surface portion 35 abuts against the upper surface 25a of the flange portion 25 around its entire circumference. This allows the lower space 10A formed between the container body 20 and the inner tray 30 to be sealed.

[0050] The above embodiment may be modified as follows. The inner tray protrusion 33 and the lid protrusion 42 are not limited to the shapes of the embodiments described above. For example, they may have an arc-shaped cross-section, an outward-facing protrusion with a step, or multiple protrusions.

[0051] The inner tray protrusion 33 and the lid protrusion 42 do not have to be similar in shape. The inner surface 33d of the inner plate projection 33 and the outer surface 42c of the lid projection 42 do not need to be fitted together around the entire circumference.

[0052] The materials of the container body 20, inner tray 30, and lid 40 are not limited to the above embodiment. They can each be changed to other materials. For example, the material of the container body 20 can be polypropylene, polyethylene terephthalate, polylactic acid, polyethylene, etc. For example, the material of the inner tray 30 can be polypropylene, polyethylene, polystyrene, polyethylene terephthalate, polylactic acid, inorganic fillers, etc., either individually, in mixtures, or stretched. For example, the material of the lid 40 can be polystyrene, polypropylene, polylactic acid, or stretched versions thereof. It is preferable that the materials of the container body 20, inner tray 30, and lid 40 are materials that can be used in a microwave oven.

[0053] The container body 20, the inner tray 30, and the lid 40 may be made of either foamed or non-foamed materials. The materials described in the above embodiment can also be changed to foamed or non-foamed materials. The fitting procedure for the food packaging container 10 involves fitting the container body 20 and the inner tray 30 together, and then fitting the lid 40 onto the fitted body. However, the fitting procedure is not limited to this. The inner tray 30 and the lid 40 may be fitted together first, and then the container body 20 may be fitted onto the fitted body of the inner tray 30 and the lid 40.

[0054] In the above embodiment, the inner tray 30 is fitted externally to the container body 20 and the lid 40 is fitted internally to the inner tray 30. However, the inner tray 30 may be fitted internally to the container body 20 and the lid 40 may be fitted externally to the inner tray 30.

[0055] Next, the technical concepts that can be understood from the above embodiments and alternative examples are described below. (a) The inner plate has an outer surface that is convex outward and an inner surface that is concave outward, and the inner plate has a convex portion. The lid has a lid projection having an outer surface that protrudes outward, The fitting portion between the inner plate and the lid consists of the inner surface of the protrusion on the inner plate and the outer surface of the protrusion on the lid. A food packaging container in which the outer surface of the central tray protrusion presses against the inner wall surface of the side wall of the container body.

[0056] (b) The container body comprises a bottom wall and a side wall that surrounds its outer edge and extends upward, and the upper part of the side wall is a flange that faces outward. The inner plate is equipped with an inner plate frame that fits externally onto the flange portion. A food packaging container in which the outer surface of the flange portion and the inner surface of the inner tray frame portion are fitting portions of the container body and the inner tray. [Explanation of symbols]

[0057] 10...Food packaging containers 10A...Lower space 10B…Upper space 20…Container body 21...Bottom wall 22... Side wall section 22a...Inner wall surface (inner surface of the container body) 25…Flange section 30... Medium plate 31…Bottom of middle plate 32…Middle plate wall part 33... Middle plate protrusion 33c...External surface (back) 33d...Inner surface (recess as a mating part) 33e...Top 33f…Bottom 34... Middle tray frame 35...Top part 36... Frame wall section 37...Latching part 40... Lid 41...Cover part 42... protruding part of the lid 42c...Outer surface (protrusion as a fitting part) 42d...Inner self 42e...top 42f…Bottom.

Claims

1. A food packaging container comprising a container body, an inner tray that fits into the container body, and a lid that fits into the inner tray, The fitting portion between the lid and the inner tray consists of an outwardly concave recess formed in the inner tray and an outwardly convex protrusion formed in the lid. The aforementioned inner tray is a food packaging container in which at least a portion of the back of the recess presses against the container body.

2. The aforementioned inner tray is fitted onto the container body, The lid is fitted inside the inner tray, The aforementioned inner plate is provided with an inner plate protrusion having an inner surface that is concave outward, The lid is provided with a lid projection having an outer surface that protrudes outward, The recess is the inner surface of the convex portion of the central plate, The aforementioned protrusion is the outer surface of the lid protrusion, The food packaging container according to claim 1, wherein at least a portion of the back of the inner surface of the inner tray protrusion presses against the inner surface of the container body.

3. The lid and the inner tray are made of a non-foamed resin material. The container body is made of a foamed resin material, as described in claim 1 or claim 2 for food packaging.

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