Food storage tray

Abstract

To provide a food storage tray which allows soft solid foods to be eaten with a part exposed from the tray without losing their shape and without soiling fingertips, and which can be molded in large quantities in a short time. [Solution] A bottom plate 10 on which solid food is placed is provided with a folding line 40 that is substantially perpendicular to the length direction, and a front bottom plate 11 and a rear bottom plate 12 located before and after the folding line. A front side wall 20 that rises from the periphery of the front bottom plate, and a rear side wall 30 that rises from the periphery of the rear bottom plate. The front side wall includes front left and right side walls 21, 22 located on the left and right in the length direction, and a front side wall 23 located on the front side. The rear side wall includes rear left and right side walls 31, 32 located on the left and right in the length direction, and a rear side wall 33 located on the rear side. The front left and right side walls are formed by straight edges 24, 24 that connect the folding line to the upper end of the front side wall, and the rear left and right side walls are formed by straight edges 34, 34 that connect the folding line to the upper end of the rear side wall.

Description

[Technical field]

[0001] The present invention relates to a technology for providing a food storage tray used for storing solid foods such as cakes, sponge cakes, castella cakes, roll cakes, and confectioneries. [Background technology]

[0002] Conventionally, food storage trays have been used in the form of box-shaped containers with an opening at the top, for storing castella cut into single servings, as shown in Figures 12 and 13. In this container, flanges 112, 112 protruding in the outer circumferential direction are formed on one plane at the upper edges of the box-shaped side walls 111, . . . , 111. Food storage trays 110 (hereinafter simply referred to as "trays") can be efficiently produced by die molding if they are made of moldable resin.

[0003] However, when eating confectionery such as castella cake stored in the above-mentioned tray 110, in order to remove the confectionery from the tray 110, it is necessary to push the confectionery upward from the opening of the tray with fingers from the bottom of the tray, but there are cases where the confectionery cannot be pushed up properly or the confectionery loses its shape. Also, when removing the confectionery by stabbing it with a fork or the like, a tool such as a fork is required, and furthermore, it is best to avoid serving confectionery that has a fork mark or that has lost its shape to guests.

[0004] To solve this problem, a packaging container has been developed as shown in Patent Document 1, JP 2013-100123 A. This packaging container has a bottom plate and side walls rising from the periphery of the bottom plate, and the side walls extend downward from their upper ends and have a number of cutouts that can be placed with fingertips. This allows food contained in the packaging container to be picked up easily and without losing its shape by pinching it with fingertips through the cutouts. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-100123 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional packaging container of Patent Document 1, it is said that the food contained therein can be easily picked up without losing its shape by pinching it with fingertips from the cutout, but depending on the storage conditions of the food and the packaging container, it may not be possible to lift it with a light force, and soft snacks that may crumble with a little force may lose their shape. Also, it is unavoidable that the fingertips will get dirty.

[0007] In addition, Patent Document 1 states that the bottom plate of the packaging container can have a folding line that passes through the center in a plan view, but it is not intended to fold the entire bottom plate so that it passes through, for example, two opposing cutouts. In this case, the folding line is merely intended to apply force from below to the bottom plate to lightly push the bottom plate upward, loosening the fit between the confectionery and the packaging container and making it easier to lift the confectionery.

[0008] Also, when making packaging containers made of moldable resin, for example, there are many types of molding methods for synthetic resins, and typical moldings for food containers and trays include vacuum molding, pressure molding, and injection molding. Vacuum molding and pressure molding involve heating and softening a film or sheet-like resin material, feeding it between the upper and lower dies of a mold, sucking it into the lower die by vacuum, or pressing it into the lower die by air pressure blown out from the upper die, and then sandwiching and molding it between the upper and lower dies. The outer periphery is then punched out to produce a food container. These moldings are suitable for the manufacture of disposable containers, which require mass production, because they can be produced in large quantities in a short period of time.

[0009] On the other hand, injection molding is a molding method that uses a mold, in which the resin material is heated and melted, sent into the mold, and then cooled to create the desired shape. This molding method can mold complex shapes using a mold. On the other hand, the mold cost is high, so it is not suitable for small-scale production, and when molding complex shapes, there is a higher risk of defective products such as burrs and cracks compared to vacuum and pressure molding. Also, because injection molding is used to produce products with complex shapes, its production efficiency is inferior to vacuum and pressure molding, so there are limitations to making inexpensive products. In addition, since the packaging container of Patent Document 1 has a complex shape, it is produced by injection molding, and it is difficult to produce it by vacuum forming or pressure forming.

[0010] The present invention has been made in consideration of the above circumstances, and aims to provide a food storage tray that does not require any force to lift the food out of the tray, that allows soft solid foods that may crumble with a little force to be eaten with part of the food exposed from the tray without losing their shape and without getting your fingertips dirty, and also aims to provide a food storage tray that can be produced in a short time by molding suitable for mass production. [Means for solving the problem]

[0011] The invention described in claim 1 is a moldable resin tray for containing solid food. The tray comprises a bottom plate on which solid food is placed, a folding line that is substantially perpendicular to the length direction, and a front bottom plate and a rear bottom plate located before and after the folding line. The tray comprises a front side wall rising from the periphery of the front bottom plate, and a rear side wall rising from the periphery of the rear bottom plate. The front side wall comprises front left and right side walls located on the left and right in the length direction, and a front side wall located on the front side in the length direction. The rear side wall comprises rear left and right side walls located on the left and right in the length direction, and a rear side wall located on the rear side in the length direction. The front left and right side walls are formed by straight edges connecting the folding line to the upper end of the front side wall, and the rear left and right side walls are formed by straight edges connecting the folding line to the upper end of the rear side wall.

[0012] The invention described in claim 2 is characterized in that the upper edge of the front side wall, the end edges of the front left and right side walls, the end edges of the rear left and right side walls, and the upper edge of the rear side wall are provided with flange portions protruding outward.

[0013] The invention of claim 3 is characterized in that, in the food storage tray of claim 1, the upper edge of the front sidewall, the edges of the front left and right sidewalls, the edges of the rear left and right sidewalls, and the upper edge of the rear sidewall are formed to form a forming reference surface that is a plane. On the forming reference surface, a front tray located in front of the folding line and formed into a container shape by a front bottom plate, front left and right sidewalls, and a front sidewall, and a rear tray located behind the folding line and formed into a container shape by a rear bottom plate, rear left and right sidewalls, and a rear sidewall are formed to protrude below the forming reference surface.

[0014] The invention described in claim 4 is characterized in that the upper edge of the front side wall, the end edges of the front left and right side walls, the end edges of the rear left and right side walls, and the upper edge of the rear side wall are provided with flange portions that protrude outward and extend above the molding reference surface.

[0015] The invention described in claim 5 is characterized in that the folding line is formed by a perforation, or perforations are formed on both sides or one side along the folding line.

[0016] The invention described in claim 6 is characterized in that stacks protruding outward are formed on the front side wall, the front left and right side walls, the rear left and right side walls, and the rear side wall. Effect of the Invention

[0017] According to the present invention, food is stored inside the tray formed by the front side wall, the front left and right side walls, the rear left and right side walls, and the rear side wall. In this state, the food storage tray is placed inside an outer packaging bag, for example, and sold as a product. The food inside the outer packaging bag is protected from contact with the outer packaging bag by the front side wall, front left and right side walls, rear left and right side walls, and rear side wall of the food containing tray. Furthermore, if a flange portion is formed protruding outwardly from the food storage tray, the flange portion will more reliably hold the food storage tray so as not to come into contact with the outer packaging bag.

[0018] When eating food after removing the food storage tray from the outer packaging bag, for example, by pinching the rear left and right side walls with fingers from both sides and pushing the front side wall downward, the front bottom plate is bent downward at the folding line, and the front side of the food can be easily exposed. Therefore, there is no need to lift the food out of the tray, and the food can be eaten with part of it exposed from the tray without losing its shape or getting fingertips dirty.

[0019] In addition, in the food storage tray, the V-shape formed by the edges of the front left and right side walls and the edges of the rear left and right side walls has a so-called sidewall-less cutout above it. However, this notch is not intended for use by pinching sweets or other foods with the fingertips and lifting them out of the tray, and so has a different purpose from the conventional cutout in Patent Document 1.

[0020] According to claim 3 of the present invention, the front tray located in front of the folding line and the rear tray located behind the folding line are formed so as to protrude below the molding reference surface, thereby making it possible to perform molding processes that allow for mass production in a short period of time, such as vacuum molding and compressed air molding.

[0021] In addition, by forming the fold line with a perforation or by forming perforations on both sides or one side along the fold line, when the front bottom plate is folded downward at the fold line, the front bottom plate can be easily separated at the perforation, making it even easier to eat foods such as sweets.

[0022] In addition, the front side wall, the front left and right side walls, the rear left and right side walls, and the rear side wall each have a stack protruding outward, so that even if the food storage trays are stacked, the stacks create gaps between each other, so the food storage trays do not stick to each other. The stacked food storage trays can be efficiently supplied on an automated production line that stores foods such as confectionery in the food storage trays and then stores them in outer packaging bags for commercialization. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a food storage tray according to a first embodiment of the present invention; [Diagram 2] 2 is a side view of the food storage tray of FIG. 1 as viewed from the right side. [Diagram 3] 1 is a perspective view showing a state in which food such as confectionery is contained in the food containing tray of the first embodiment. FIG. [Figure 4] FIG. 2 is a perspective view showing a food storage tray according to a second embodiment of the present invention. [Diagram 5] FIG. 5 is a plan view of the food containing tray of FIG. 4. [Figure 6] FIG. 13 is a side view of a food storage tray according to a second embodiment, and a schematic vertical cross-sectional view of the food storage trays stacked one on top of the other. [Figure 7] 1 is a perspective view showing a state in which a food storage tray of a first embodiment containing food such as confectionery is stored inside an outer packaging bag. FIG. [Figure 8] FIG. 8 is a side view showing the food storage tray of FIG. 7 as viewed from the side. [Figure 9] 1 is an explanatory diagram showing the state when food such as sweets is eaten after the food storage tray is removed from the outer packaging bag. FIG. [Figure 10] FIG. 2 is a perspective view showing a food storage tray according to a third embodiment of the present invention. [Figure 11] 11 is a perspective view showing a state in which a food storage tray of a third embodiment containing food such as confectionery is stored inside an outer packaging bag. FIG. [Figure 12]FIG. 1 is a perspective view showing a conventional food storage tray. [Figure 13] FIG. 1 is a perspective view of a conventional food storage tray containing food. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a food storage tray according to a first embodiment of the present invention; FIG. The food storage tray 1 in this embodiment is a moldable resin tray for storing solid food F such as cake, sponge cake, castella, roll cake, and confectionery (see Figure 3), and will be described using an example of storing solid food F such as castella. Castella cakes are sold in a packaged form, either in their entirety or pre-cut into individual servings for easy eating. The individual servings of castella cakes are roughly rectangular in shape and are stored in the storage compartment inside the food storage tray 1, as shown in Figure 3.

[0025] The food storage tray 1, which is adapted to the shape of food F such as castella, has a box-like shape formed to open on the top, as shown in Figures 1 and 2. For convenience, in this embodiment, the upper right direction in Figure 1 is the front side, the lower left direction in Figure 1 is the rear side, the lower right direction in Figure 1 is the right side, and the upper left direction in Figure 1 is the left side. In this embodiment, the front-to-rear direction is the length direction.

[0026] The food storage tray 1 has a bottom plate 10 having a bottom surface on which food F is placed, and a folding line 40 extending over the entire width in the left-right direction and perpendicular to the longitudinal direction of the bottom plate 10. In this embodiment, perforations 40a are formed along the folding line 40. Furthermore, the bottom plate 10 is composed of a front bottom plate 11 on the front side and a rear bottom plate 12 on the rear side, with the folding line 40 as the boundary.

[0027] In addition, the food storage tray 1 has a front side wall 20 that rises from the periphery of the front bottom plate 11, and this front side wall 20 is composed of front left and right side walls 21, 22 located on the left and right sides of the tray in the longitudinal direction, and a front side wall 23 located on the front side in the longitudinal direction. 6, the front left and right side walls 21, 22 form a generally isosceles right triangle in side view, with the straight edges 24, 24 forming the hypotenuse extending from near the end of the folding line 40 toward the upper end of the front side wall 23. The front side wall 23 is positioned between the front left and right side walls 21, 22, thereby forming a front tray 4 that serves as a front storage section. Furthermore, the edges 24, 24 and the upper edge 25 of the front side wall 23 are provided with flange portions 26a, 26b, 26c formed so as to protrude outward, respectively.

[0028] In addition, the food storage tray 1 has a rear side wall 30 rising from the periphery of the rear bottom plate 12, and this rear side wall 30 is composed of rear left and right side walls 31, 32 located on the left and right sides of the tray in the longitudinal direction, and a rear side wall 33 located on the rear side in the longitudinal direction. The rear left and right side walls 31, 32 form a generally isosceles right triangle in side view, with the straight edges 34, 34 forming the hypotenuse extending from near the end of the folding line 40 toward the upper end of the rear side wall 33. The rear side wall 33 is positioned between the rear left and right side walls 31, 32, thereby forming a rear tray 5 that serves as a rear storage section. Furthermore, the edges 34, 34 and the upper edge 35 of the rear side wall 33 are provided with flanges 36a, 36b, 36c formed so as to protrude outward, respectively.

[0029] As described above, the food storage tray 1 is composed of a front tray 4 located in front of the folding line 40 and formed into a container shape by the front bottom plate 11, the front left and right side walls 21, 22, and the front side wall 23, and a rear tray 5 located behind the folding line 40 and formed into a container shape by the rear bottom plate 12, the rear left and right side walls 31, 32, and the rear side wall 33.

[0030] Next, the operation of the food containing tray 1 according to the first embodiment will be described with reference to the drawings. Confectionery F such as castella cake cut into portions for one meal is stored inside a tray 1 formed by a front tray 4 and a rear tray 5, as shown in Fig. 3. In this state, it is stored inside an outer packaging bag 60, as shown in Fig. 7, and sold as a product.

[0031] 7 and 8, the castella or other confectionery F inside the outer packaging bag 60 is protected from contact with the outer packaging bag 60 by the front side wall 23, the front left and right side walls 21, 22, the rear left and right side walls 31, 32, and the rear side wall 33. Moreover, the flanges 26a, 26b, 26c, 36a, 36b, 36c protruding outward from the food storage tray 1 further securely hold the confectionery F from contact with the outer packaging bag 60.

[0032] In particular, if the top surface of the confectionery F comes into contact with the outer packaging bag 60, the surface of the confectionery F will adhere to the outer packaging bag 60 and crumble, thereby compromising the value of the product. However, the flange portion 26c of the front side wall 23 and the flange portion 36c of the rear side wall 33 hold the outer packaging bag 60 so that its inside does not come into contact with the top surface of the confectionery F, thereby reducing the possibility of contact between the confectionery F and the outer packaging bag 60. Furthermore, the flange portions 26a, 26b of the front left and right side walls 21, 22 and the flange portions 36a, 36b of the rear left and right side walls 31, 32 also have the effect of holding the side surfaces of the confectionery F so as not to come into contact with the outer packaging bag 60.

[0033] When eating confectionery F after removing the food storage tray 1 from the outer packaging bag 60, for example, by pinching the rear left and right side walls 31, 32 with fingers from both sides and pushing the front side wall 23 downward as shown in Figure 9, the front bottom plate 11 will bend downward at the fold line 40 and the entire front tray 4 will fall downward, easily exposing the front side of the confectionery F. Therefore, there is no need to lift the food F such as castella cake from the tray to take it out, and the food F can be eaten by exposing a part of it from the tray without losing its shape or getting your fingertips dirty.

[0034] In the food storage tray 1, the V-shape formed by the edges 24, 24 of the front left and right side walls 21, 22 and the edges 34, 34 of the rear left and right side walls 31, 32 has a so-called cutout without a side wall above it, so that the side of the food F is exposed. However, the above V-shaped cutout is a shape that is necessarily formed in order to mold the food storage tray 2 of the second embodiment of the present invention described below. Therefore, the above V-shaped cutout is not intended to pinch the exposed part of the side of the food with fingertips and lift it up and remove it from the tray, so its purpose and configuration are different from the cutout portion of Patent Document 1 presented in the prior art.

[0035] Furthermore, by forming the folding line 40 with a perforation 40a or by forming the perforation 40a along the folding line 40, when the front bottom plate 11 is folded downward at the folding line 40 to eat food, the front bottom plate 11 can be easily separated by the action of the perforation 40a, making it even easier to eat food.

[0036] Next, a food storage tray according to a second embodiment of the present invention will be described with reference to the drawings. As shown in Figures 4 and 5, the food storage tray 2 of the second embodiment is basically the same as the food storage tray 1 of the first embodiment described above, except that the upper edge 25 of the front sidewall 23, the edges 24, 24 of the front left and right sidewalls 21, 22, the edges 34, 34 of the rear left and right sidewalls 31, 32, and the upper edge 35 of the rear sidewall 33 are formed to form a single plane forming a forming reference surface 6. Moreover, the food storage tray 2 of the second embodiment is characterized in that the front tray 4 located in front of the folding line 40 and formed into a container shape by the front bottom plate 11, the front left and right sidewalls 21, 22, and the front sidewall 23, and the rear tray 5 located behind the folding line 40 and formed into a container shape by the rear bottom plate 12, the rear left and right sidewalls 31, 32, and the rear sidewall 33 are formed to protrude below the forming reference surface 6.

[0037] In addition, at the upper edge 25 of the front side wall 23, the edges 24, 24 of the front left and right side walls 21, 22, the edges 34, 34 of the rear left and right side walls 31, 32, and the upper edge 35 of the rear side wall 33, the flange portions 26a, 26b, 26c, 36a, 36b, 36c protruding outwardly are configured to extend from above the molding reference surface 6 along the reference surface 6.

[0038] Further, stacks 50, . . . , 50 protruding outward are formed at arbitrary positions on the front side wall 23, the front left and right side walls 21, 22, the rear left and right side walls 31, 32, and the rear side wall 33. The stacks 50 are protruding partial structures provided to improve peelability and prevent overlapping.

[0039] Therefore, the second embodiment of the food storage tray 2 shown in Figure 4 is formed into the first embodiment of the food storage tray 1 shown in Figure 1 by folding it at the fold line 40 so that the front bottom plate 11 and the rear bottom plate 12 are flat.

[0040] Next, the molding process for forming the food storage tray 2 of the second embodiment shown in Fig. 4 will be described, particularly using the molding process by vacuum forming as an example. Note that the process of pressure forming is almost the same as that of vacuum forming, so the description thereof will be omitted.

[0041] Vacuum forming is as explained in the prior art, but the upper and lower dies of the mold are formed to form the shapes of the front tray 4 and rear tray 5 of the food storage tray 2. A film or sheet-like resin material is heated and softened, fed between the upper and lower dies of the mold, and then sandwiched between the upper and lower dies while being sucked into the lower die by vacuum and tightly attached. Thereafter, the outer periphery of the flanges 26a, 26b, 26c, 36a, 36b, 36c is punched to form the food storage tray 2 shown in FIG. 4. As a result, a large number of food storage trays 2,...,2 can be manufactured in a short time.

[0042] The flat portions of the flanges 26a, 26b, 26c, 36a, 36b, and 36c provided on the outer periphery of the food containing tray 2 are formed by trimming.

[0043] The manufactured food storage trays 2,...,2 can be stacked as shown in Fig. 6. At this time, the front side wall 23, the front left and right side walls 21, 22, the rear left and right side walls 31, 32, and the rear side wall 33 each have a stack 50,...,50 protruding outward, so that even if the food storage trays 2,...,2 are stacked, the food storage trays 2,...,2 do not come into close contact with each other because gaps are generated between the stacks 50,...,50. Therefore, after forming the food storage trays 2,...,2 into the food storage trays 1 of the first embodiment, food F is stored in the food storage trays 1, and then the food storage trays 1 are stored inside the packaging outer bag 60 as shown in Fig. 7, so that the food storage trays 2,...,2 can be efficiently supplied on an automated production line for commercialization.

[0044] Next, a food storage tray according to a third embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 10, the food storage tray 3 of the third embodiment stores food F having a circular cross section, such as a roll cake, and is a modified version of the food storage tray 1 of the first embodiment, and is basically configured in the same manner as the food storage tray 1 of the first embodiment, so detailed explanation will be omitted. The food F in Fig. 10 is a roll cake cut into portions for one meal.

[0045] Therefore, the function of the food containing tray 3 of the third embodiment is almost the same as that of the food containing tray 1 of the first embodiment. As shown in Fig. 10, the roll cake cut into portions is stored inside the tray 1 formed by the front side wall 23, the front left and right side walls 21, 22, the rear left and right side walls 31, 32, and the rear side wall 33. In this state, as shown in Fig. 11, it is stored inside an outer packaging bag 60 and sold as a product.

[0046] 11, the flanges 26a, 26b, 26c, 36a, 36b, 36c facing outward of the food storage tray 3 hold the roll cake inside the outer packaging bag 60 so that the top and sides of the roll cake do not come into contact with the inside of the outer packaging bag 60, preventing the roll cake from losing its shape. When the food storage tray 3 is removed from the outer packaging bag 60 and the roll cake is eaten, the process is almost the same as when the confectionery F is stored in the food storage tray 1 of the first embodiment.

[0047] In the third embodiment, the food storage tray 3 is formed so that the front tray 4 located in front of the folding line 40 and the rear tray 5 located behind the folding line 40 protrude below the forming reference plane 6, which is a plane formed by the upper edge 25 of the front sidewall 23, the edges 24, 24 of the front left and right sidewalls 21, 22, the edges 34, 34 of the rear left and right sidewalls 31, 32, and the upper edge 35 of the rear sidewall 33. This formed tray is folded along the folding line 40 so that the front bottom plate 11 and the rear bottom plate 12 are flat, thereby forming the food storage tray 3 having the shape shown in FIG.

[0048] As described above, food storage trays 1, 2 of the present embodiment can be adapted to a wide range of types and shapes of food stored inside trays 1, 2 by adjusting the size of bottom plate 10 on which the food is placed to the food. [Industrial Applicability]

[0049] The present invention can be used in manufacturing and retail businesses that handle solid foods such as cakes and confectioneries, or in manufacturing and retail businesses that handle food containers such as food storage trays for storing the above-mentioned solid foods, or in other businesses related to the above-mentioned food containers. [Explanation of symbols]

[0050] 1,2,3 Food storage tray 4 Front tray 5 Rear tray 6 Forming reference surface 10 Bottom plate 11 Front bottom plate 12 Rear bottom plate 20 Front side wall 21 Front left side wall 22 Front right side wall 23 Front side wall 24 Edge 25 Top edge 26a, 26b, 26c Flange part 30 Rear side wall 31 Rear left side wall 32 Rear right wall 33 Rear side wall 34 Edge 35 Top edge 36a, 36b, 36c Flange part 40 Fold line 40a Perforation 50 stack 60 Outer packaging bag

Claims

1. A moldable plastic tray for containing solid food, The container has a bottom plate on which solid food is placed, a folding line that is substantially perpendicular to the length direction, and a front bottom plate and a rear bottom plate located before and after the folding line, a front side wall rising from the periphery of the front bottom plate and a rear side wall rising from the periphery of the rear bottom plate, The front side wall includes front left and right side walls located on the left and right sides in the longitudinal direction, and a front side wall located on the front side in the longitudinal direction, The rear side wall includes rear left and right side walls located on the left and right sides in the longitudinal direction, and a rear side wall located on the rear side in the longitudinal direction, the front left and right side walls are formed with linear edges connecting the folding lines to the upper ends of the front side walls, a folding line extending from the upper end of each of the rear left and right side walls to the upper end of the rear side walls;

2. 2. The food storage tray of claim 1, further comprising flange portions protruding outward at the upper edge of the front side wall, the end edges of the front left and right side walls, the end edges of the rear left and right side walls, and the upper edge of the rear side wall.

3. an upper end edge of the front side wall, end edges of the front left and right side walls, end edges of the rear left and right side walls, and an upper end edge of the rear side wall are formed to form a molding reference surface that is a single plane; A food storage tray as described in claim 1, characterized in that, on the molding reference surface, a front tray located in front of the folding line and formed into a container shape by a front bottom plate, front left and right side walls, and a front side wall, and a rear tray located behind the folding line and formed into a container shape by a rear bottom plate, rear left and right side walls, and a rear side wall are formed so as to protrude below the molding reference surface.

4. A food storage tray as described in claim 3, characterized in that the upper edge of the front side wall, the end edges of the front left and right side walls, the end edges of the rear left and right side walls, and the upper edge of the rear side wall are provided with flange portions that protrude outward and extend above the molding reference surface.

5. 4. The food storage tray according to claim 1 or 3, wherein the folding lines are formed by perforations, or perforations are formed on both sides or one side along the folding lines.

6. 4. The food storage tray according to claim 3, wherein stacks protruding outward are formed on the front side wall, the front left and right side walls, the rear left and right side walls, and the rear side wall.

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