Packaging container for sushi

Abstract

Provided is a sushi packaging container that ensures a small outer shape despite having a leg portion, and that is easy to use chopsticks to pick up the sushi packed therein even when a placement portion for placing each piece of sushi is provided. A sushi packaging container (1) formed of a synthetic resin sheet, having a plurality of individual placement surface portions (24) for placing each piece of sushi in a bottom surface portion (21), wherein the sushi packaging container (1) is provided with: a peripheral wall portion (22) provided around the bottom surface portion (21); a step portion (23) formed so that a boundary between the peripheral wall portion (22) and the bottom surface portion (21) is in a stepped shape, and so that an upper surface thereof is a step surface portion (23a); a ridge portion (25) provided at a height equivalent to the step surface portion (23a) around each individual placement surface portion (24); a recess portion (26) formed so that a part of the periphery of each individual placement surface portion (24) is at a height equivalent to the bottom surface portion (21) or a height lower than the bottom surface portion (21); and a leg portion (27) formed by recessing the bottom surface portion (21) downward from the individual placement surface portion (24).

Description

Technical Field

[0001] This invention relates to a sushi packaging container made of synthetic resin sheet for filling sushi. Background Technology

[0002] In department stores, supermarkets, convenience stores, and other retail stores, it is common to see packaged sushi, such as nigiri sushi and hand-rolled sushi, displayed and sold in packaging containers. Various studies have been conducted on these packaging containers for sushi.

[0003] For example, in containers for packaging sushi, sometimes the following situation occurs: the sushi placed next to each other are pressed together, and the sushi shifts and moves when being handled or picked up. In order to prevent this from happening, there are containers that divide the bottom surface into holding sections, so that sushi can be placed in each holding section.

[0004] More specifically, the following sushi packaging containers have been developed: a packaging container with a recessed portion formed in the shape of sushi at the bottom (see Patent Document 1 below); a sushi packaging container with a recessed portion of a size that allows the lower part of the sushi to just enter for individual storage (see Patent Document 2 below); a packaging container with peripheral walls of varying heights on the outer periphery of the storage portion (see Patent Document 3 below); and a sushi packaging container with a protrusion on the bottom surface of the sushi container that allows entry between sushi pieces arranged in a matrix at an inclined angle (see Patent Document 4 below).

[0005] In addition, in order to attract the attention of customers, there is a sushi container with a food tray set on the outer periphery of the container body, which gives the sushi ingredients a sense of volume by placing the top of the sushi ingredients on the food tray (see Patent Document 5 below).

[0006] In addition, a container has been developed that makes the sushi stand out by being placed on top, thus giving it a sense of volume, by having a suspended bottom or legs.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Utility Model Registration No. 3062105

[0010] Patent Document 2: Japanese Patent Application Publication No. 2002-95429

[0011] Patent Document 3: Japanese Patent Application Publication No. 2012-101816

[0012] Patent Document 4: Japanese Patent Application Publication No. 2012-176773

[0013] Patent Document 5: Japanese Patent Application Publication No. 2011-157113 Summary of the Invention

[0014] The problem the invention aims to solve

[0015] When the bottom of a container for packaging sushi is divided into a holding section, a protrusion is sometimes provided around each holding section to prevent the sushi from shifting or moving.

[0016] However, when surrounded by protrusions, it is difficult to pick up sushi with chopsticks because the tips of the chopsticks may touch the protrusions.

[0017] Furthermore, when sushi containers have legs, they are usually located on the outer side of the sushi-holding surface and inside the flange. In this case, since the legs require space, the container's overall shape tends to become larger.

[0018] When the container becomes larger, there is more empty space even when sushi is put in it. In addition, since the area of ​​the sushi-holding part becomes relatively smaller, the amount that can be stored seems smaller, which may reduce purchasing power.

[0019] Therefore, the object of the present invention is to provide a sushi packaging container that, despite having legs, ensures a small overall shape and is easy to pick up with chopsticks even when provided with a holding part for holding individual sushi pieces.

[0020] Solution for solving the problem

[0021] A sushi packaging container of the present invention is formed from a synthetic resin sheet and has a plurality of individual placement surfaces for holding various sushi pieces on its bottom surface. The sushi packaging container is characterized by comprising: a peripheral wall portion disposed around the bottom surface; a stepped portion formed by creating a stepped boundary between the peripheral wall portion and the bottom surface, and setting its upper surface as the stepped surface; a protruding portion disposed around each of the individual placement surfaces at the same height as the stepped surface; a recessed portion formed by partially forming the area around each of the individual placement surfaces at the same height as or below the bottom surface; and a leg portion formed by recessing the bottom surface downwards from within the individual placement surfaces.

[0022] In the sushi packaging container described above, the raised strip surrounds the individual holding surface, thus preventing the sushi from shifting. Furthermore, because it doesn't completely surround the surface but has recessed areas, the tips of chopsticks are less likely to touch the raised strips, making it easier to pick up the sushi. Additionally, since the legs are formed within the individual holding surface, the overall shape doesn't need to be enlarged as in the past, allowing for a compact container size. Moreover, the stepped portion further enhances the compact shape, and the tips of the sushi ingredients, positioned on the stepped surface, are less likely to be flattened, resulting in a more aesthetically pleasing appearance.

[0023] In the sushi packaging container described above, the protruding sections can be configured to include parallel protruding sections and intersecting protruding sections. The parallel protruding sections extend continuously from the stepped section and are arranged in a parallel manner, while the intersecting protruding sections are arranged in an orientation orthogonal to the parallel protruding sections. With this structure, the parallel and intersecting protruding sections can surround the individual serving surface, allowing the sushi to be arranged in a matrix-like pattern. Furthermore, because the protruding sections extend from the stepped section and are arranged in a parallel manner, the periphery of the container is less prone to deformation, making it easier to pick up.

[0024] In the sushi packaging container described above, the recessed portion may be provided between the parallel protruding sections and the intersecting protruding sections. This structure allows the tip of chopsticks to easily pick up the sushi along the intersecting protruding sections.

[0025] In the sushi packaging container described above, the recessed portions may be located at opposite positions on each of the individual mounting surfaces. With this structure, recessed portions exist on both sides of the sushi, making it easy to pick up the sushi from both sides using chopsticks.

[0026] In the sushi packaging container described above, the legs may be formed as elongated, straight recesses. With this structure, the legs not only support the container but also function as a storage section for storing moisture and other substances that may seep from the sushi ingredients. Attached Figure Description

[0027] Figure 1 The first embodiment of the sushi packaging container of the present invention is shown in a perspective view with the lid open.

[0028] Figure 2 yes Figure 1 Front view of the container body and lid of the sushi packaging container.

[0029] Figure 3 yes Figure 1A top view of the main body of the packaging container for sushi.

[0030] Figure 4 yes Figure 1 A top view of the lid of a sushi packaging container.

[0031] Figure 5 yes Figure 1 A cross-sectional view near the center of a sushi packaging container.

[0032] Figure 6 It means in Figure 1 A cross-sectional view of sushi being packaged in a sushi container.

[0033] Figure 7 This is a top view showing a sushi packaging container according to the second embodiment of the present invention.

[0034] Figure 8 This is a top view showing a sushi packaging container according to a third embodiment of the present invention. Detailed Implementation

[0035] Hereinafter, embodiments of the sushi packaging container of the present invention will be described based on the accompanying drawings.

[0036] like Figure 1 or Figure 2 As shown, the sushi packaging container 1 of the first embodiment of the present invention includes a container body 2 and a cover 3 covering the container body 2.

[0037] In this embodiment, a cover 3 is provided, but it can also be configured without a cover 3.

[0038] The sushi packaging container 1 is a horizontally elongated rectangular prism shape, without any particular limitation. It can be set to a size of about 50mm in height, 200mm in length, and 150mm in width, and can hold nigiri sushi, rolled sushi, inari sushi, pressed sushi, and other types of sushi.

[0039] In addition, nigiri sushi refers to sushi made by placing slices of raw fish and shellfish, thick omelet (hereinafter referred to as sushi ingredients), etc. on vinegared rice (rice mixed with vinegar, the same below) and squeezing it tightly. Oshi sushi refers to sushi made by filling a square mold with vinegared rice, placing sushi ingredients on it, and squeezing it. Inari sushi refers to a dish made by stuffing a mixture of various ingredients mixed with vinegared rice into sweet boiled fried tofu (thinly sliced ​​tofu fried in oil). Maki sushi refers to sushi made by rolling sushi ingredients such as dried nori (seaweed dried into a board shape) and thick omelet.

[0040] There are no particular restrictions on the shape of these various sushi; they can be cube-shaped, cuboid-shaped, cylindrical, etc.

[0041] The packaging container 1 for sushi is not limited to the above-mentioned shape. For example, in addition to being circular or oblong when viewed from above, it can also be triangular, square, rectangular, parallelogram, trapezoidal, pentagonal, hexagonal, or octagonal polygonal shapes when viewed from above.

[0042] like Figure 3 As shown, the container body 2 is formed into a rectangular flat plate shape with one pair of chamfered corners and the other pair of rounded corners when viewed from above, as... Figure 1 , Figure 3 as well as Figure 5 As shown, the container body 2 includes: a bottom surface 21; a peripheral wall 22 that surrounds the bottom surface 21 and stands upright; a step 23 that forms a stepped boundary between the peripheral wall 22 and the bottom surface 21; a separate mounting surface 24 that divides the bottom surface 21; protruding strips 25 (25a-25c) that surround the separate mounting surface 24; a recess 26 that is provided in a portion around the separate mounting surface 24; and a leg 27 that is recessed downward from the separate mounting surface 24.

[0043] like Figure 1 or Figure 3 As shown, the bottom surface 21 is a rectangular horizontal surface that can hold sushi. The surface is divided into rectangular or parallelogram shapes by protrusions 25, and each sushi piece has a separate holding surface 24. The bottom surface 21 can be a smooth surface, or the entire surface or a portion thereof can be a surface with repeated small undulations, such as a corrugated or knurled pattern. By making the bottom surface 21 a undulating surface, the contact area between the sushi and the bottom surface 21 is reduced, which can inhibit the sushi from sticking and make it easier to remove.

[0044] exist Figure 2 or Figure 3 In the orientation, the individual mounting surfaces 24 are arranged in four rows in the left-right direction and two rows in the front-back direction, with each individual mounting surface 24 arranged in an inclined position relative to the edge of the container body 2. In this embodiment, the individual mounting surfaces 24 are formed in an inclined position of approximately 45° relative to the edge of the container body 2, but it is not limited to this, and may also be formed in a vertical or parallel position relative to the edge of the container body 2.

[0045] If a portion of the bottom surface 21 within the separately mounted surface 24 is made into a concave-convex surface, and the remaining portion is made into a smooth surface, the adhesion of sushi can be suppressed, and the sushi can be fixed (anti-slip) based on contact with the smooth surface. In this case, the area occupancy of the concave-convex surface is preferably 70% or less in the separately mounted surface 24, more preferably 50% or less.

[0046] like Figure 5 As shown, the peripheral wall portion 22 is formed to rise from the periphery of the bottom portion 21 and extend upward. A flange portion 22a extending outward from the upper edge of the peripheral wall portion 22 is provided, and a skirt portion 22b formed in a cross-section that extends outward in a letter J shape is provided on the outer edge of the flange portion 22a.

[0047] A stepped portion 23 is provided at the boundary between the peripheral wall portion 22 and the bottom portion 21, and its upper surface is set as a horizontal stepped portion 23a.

[0048] By providing the stepped portion 23, the rigidity of the container body 2 is improved, making it less prone to bending when the container body 2 is picked up. In addition, when holding nigiri sushi on the separate mounting surface 24, the space where the top of the sushi ingredient extends onto the stepped surface 23a allows it to be positioned inside the container in a way that prevents the ingredient from being compressed or flattened.

[0049] The protruding portion 25 is formed by bulging the bottom portion 21 upwards and is provided around each individual mounting portion 24 to divide the area. Each individual mounting portion 24 is not completely surrounded by the protruding portion 25, but is also partially formed with a through portion as a recess 26.

[0050] The protruding part 25 is set to the same height as the stepped surface 23a, preferably within ±3mm of the height of the stepped surface 23a, more preferably within ±1mm, and particularly preferably the same height (including within the range of design error).

[0051] like Figure 3 As shown, the protrusion 25 is configured to include: parallel protrusions 25a, which extend continuously from the step portion 23 and are arranged in a parallel manner at approximately equal intervals in an inclined direction, dividing the container body 2 in the left-right direction; and intersecting protrusions 25b, which are disposed on the central cross section of the container body 2 and are arranged in an orientation orthogonal to the parallel protrusions 25a, dividing the container body 2 in the front-back direction.

[0052] like Figure 3 As shown, the parallel protrusions 25a are formed by straight protrusions 25 extending obliquely (approximately 45°) from the near-front and inner edges, respectively. The base end of each protrusion 25 is formed into a triangular shape when viewed from above and is relatively wide. Each protrusion 25 of the parallel protrusions 25a is approximately one-third the length of the front-to-back width of the container body 2. In this embodiment, three protrusions 25 are provided at the near-front and inner edges to form the parallel protrusions 25a, but this is not a limitation.

[0053] By providing parallel protrusions 25a on the near front and inner edges, the container body 2 is less prone to bending and can be easily picked up by holding the short edges on both sides.

[0054] like Figure 3 As shown, the cross-shaped protrusion 25b is formed as a straight line with a width wider than the parallel protrusion 25a, and is arranged in an orientation orthogonal to the parallel protrusion 25a. Each individual mounting surface 24 is divided by the parallel protrusion 25a, the cross-shaped protrusion 25b, and the peripheral wall 22 of the container body 2.

[0055] In this embodiment, there are also end protrusions 25c that extend laterally in a tongue-like shape from the left and right edges of the container body 2, respectively. The end protrusions 25c are arranged along the central cross section and divide the individual mounting surfaces 24 provided at the left and right ends.

[0056] The recess 26 is provided at least once around each individual mounting surface 24, and is formed at the same height as or lower than the bottom surface 21. By providing the recess 26, the tip of the chopsticks can grip the sushi without getting stuck in the protruding strips 25, and it is easy to pick up the sushi. In this embodiment, a through-shaped recess is provided between the tip of the parallel protruding strips 25a and the end of the intersecting protruding strips 25b, and the recess 26 is provided in this part, which is lower than the bottom surface 21. In addition, by providing the recess 26 at two locations and arranging them facing each other, it is easier for the chopsticks to pass through from both sides, making it easier to pick up the sushi.

[0057] The opening width of the recess 26 is not particularly limited, but is preferably 15mm to 5mm, and more preferably 12mm to 8mm. In addition, the height of the portion with the recess 26 is preferably set to be within ±1mm of the bottom portion 21, and more preferably the same height (including the design error range).

[0058] The legs 27 are formed concave by making the bottom surface 21 a horizontally elongated inverted trapezoidal platform. In this embodiment, one or two legs 27 are provided in each individual mounting surface 24. In this embodiment, the legs 27 are provided along the edge of the container body 2 at the inner side of the step portion 23, and each leg 27 is concave downward with the same protruding width, which can support the container body 2. In addition, the legs 27 are formed concave, so they also serve as storage parts, which can store water that seeps out from the sushi.

[0059] Since the legs 27 are formed within the separately mounted face 24, there is no need to increase the external shape of the container body 2, and the external shape of the container body 2 can be made compact.

[0060] like Figure 1 , Figure 2 or Figure 4 As shown, the cover 3 is formed in a roughly trapezoidal frustum shape, such as... Figure 5As shown, the cover 3 includes: a top surface 31; a side wall surface 32 extending downward from the periphery of the top surface 31; a flange 33 extending outward from the lower edge of the side wall surface 32; a skirt 33a protruding downward from the flange 33; and a fitting portion 34 provided on the skirt 33a and fitting with the outer edge of the container body 2.

[0061] like Figure 4 As shown, the top surface 31 is a horizontal plane that appears as a deformed rectangle when viewed from above.

[0062] The sidewall surface 32 is an inclined surface that slopes downward from the periphery of the top surface 31.

[0063] like Figure 5 As shown, the flange portion 33 is formed as an inclined surface that rises towards the outside of the lid. A skirt portion 33a facing downward is provided on the outer edge of the flange portion 33, and a fitting portion 34 is provided on the skirt portion 33a that protrudes towards the inside of the lid 3 and is locked to the lower side of the outer edge of the container body 2.

[0064] The fitting portion 34 is formed to extend to an appropriate length in the circumferential direction and is provided with gaps in the circumferential direction of the cover 3. In this embodiment, the cover 3 is an external fitting structure that is fitted into the container body 2 from the outside, but it is not limited to this. Any fitting structure such as an internal fitting structure or an internal and external fitting structure can also be used. Alternatively, it can be configured such that the cover 3 is placed on the container body 2 without fitting.

[0065] The following is an example of a method for manufacturing a sushi packaging container 1.

[0066] The container body 2 and the lid 3 are not particularly limited and can be manufactured by thermoforming a synthetic resin sheet. The synthetic resin sheet can be either a non-foamed resin sheet or a foamed resin sheet, but it is preferred that the container body 2 be a foamed resin sheet and the lid 3 be a non-foamed resin sheet.

[0067] In the case of non-foamed resin sheets, it is preferable to use sheets with a thickness in the range of 0.1 mm to 2.0 mm, and particularly preferable to use sheets in the range of 0.2 mm to 1.2 mm.

[0068] When using foamed resin sheets, sheets with a thickness in the range of 0.5 mm to 4.0 mm are preferred, and sheets with a thickness in the range of 0.7 mm to 2.2 mm are particularly preferred. Furthermore, when using foamed resin sheets, the foaming ratio is preferably set to 1.05 to 20.0 times, and particularly preferably 1.5 to 15.0 times.

[0069] As non-foamed resin sheets, thermoplastic resin sheets such as polyethylene resin sheets, polypropylene resin sheets, and other polyolefin resin sheets can be used; polystyrene resin sheets; polyethylene terephthalate resin sheets, and polyester resin sheets such as heat-resistant modified polyethylene terephthalate resin sheets can also be used. Alternatively, materials capable of withstanding microwave oven heating can also be used, such as heat-resistant polystyrene resin sheets, polypropylene resin sheets, and heat-resistant modified polyethylene terephthalate resin sheets.

[0070] As foamed resin sheets, for example, foamed polyolefin resin sheets, foamed polystyrene resin sheets, foamed polyethylene terephthalate, and other foamed polyester resin sheets can be used.

[0071] Laminated sheets made of laminated synthetic resin sheets can also be used as laminated sheets. Examples include laminated sheets in which a resin film is thermally laminated on a non-foamed resin sheet or a foamed resin sheet, laminated sheets obtained by co-extrusion, and laminated sheets obtained by extrusion lamination.

[0072] Biomass plastics can be used as non-foamed resin sheets, foamed resin sheets, and laminated sheets.

[0073] Biomass plastics are polymer materials synthesized through chemical or biological processes using materials derived from renewable organic resources. Compared to petroleum-derived resins, biomass plastics can reduce carbon dioxide emissions into the atmosphere, thus lowering their environmental impact.

[0074] Examples of biomass plastics include polylactic acid resin, biomass polyethylene, and biomass polyethylene terephthalate.

[0075] Examples of thermoforming include vacuum forming, pneumatic forming, vacuum pneumatic forming, and hot plate forming.

[0076] The container body 2 and the lid 3 are preferably colored, such as black or white, but can also be made transparent or semi-transparent so that the interior can be visually identified. The lid 3 is preferably transparent. In addition, text, patterns, etc. can be printed or engraved on the surface of the container body 2 and the lid 3 to a degree that does not impede visibility when they are transparent or semi-transparent.

[0077] Furthermore, reinforcing ribs or anti-slip embossing can be provided at appropriate locations. Additionally, bulging protrusions in the shape of cubes or cuboids can be provided at appropriate locations on the container body 2 and the lid 3 for stacking purposes.

[0078] The following is an example of how to use the sushi packaging container 1, illustrating the case of storing nigiri sushi S. Furthermore, the nigiri sushi S is made by placing a rectangular slice of fish S2 on a rectangular rice S1.

[0079] like Figure 6 As shown, each nigiri sushi S is placed on the individual placement surface 24 of the container body 2. The lid 3 is placed on the container body 2 and pressed from above, so that the fitting part 34 is fitted into the outer edge of the container body 2, and the nigiri sushi S can be put into the sushi packaging container 1.

[0080] To open the sushi packaging container 1, it can be opened by placing your fingertips or the like on the lower end of the skirt 33a of the lid 3 and spreading them open to release the engagement of the fitting part 34, and then picking up the lid 3.

[0081] like Figure 6 As shown, in the sushi packaging container 1, since each nigiri sushi S is surrounded by the protruding strip 25 and the peripheral wall 22 of the container body 2, the nigiri sushi S is not easily shifted or moved even when the container 1 is picked up.

[0082] Furthermore, since the leg 27 is housed within a separate mounting surface 24, the overall shape of the container body 2 is compact. Moreover, by providing the step portion 23, the top of the ingredients in the nigiri sushi S is positioned on the step surface 23a, preventing the top of the ingredients from being flattened and making the ingredients in the nigiri sushi S look more aesthetically pleasing.

[0083] When using chopsticks or other utensils to pick up the nigiri sushi S, the notched portion 26 allows the chopsticks to pick up the sushi S without getting stuck on the protruding strip portion 25, making it easy to pick up. In addition, since the leg portion 27 is formed as a concave portion, the moisture that seeps out from the nigiri sushi S is stored here, so the moisture does not easily scatter.

[0084] exist Figure 7 The second embodiment of the sushi packaging container 1a is shown.

[0085] like Figure 7 As shown, the main body 2a of the sushi packaging container 1a has four rows of individual mounting surfaces 24 in the left-right direction and one row of individual mounting surfaces 24 in the front-back direction. The legs 27 are located between the individual mounting surfaces 24 and the peripheral wall 22 on the near front and inner sides, and are located within the individual mounting surfaces 24 on the left and right sides. As a result, the front-back width of the container 1a is increased, but the left-right length can be reduced compared to the past, and the container 1a as a whole can have a more compact shape than before.

[0086] exist Figure 8 The third embodiment of the sushi packaging container 1b is shown.

[0087] like Figure 8As shown, the container body 2b of the sushi packaging container 1b has four rows of individual mounting surfaces 24 in the left-right direction and three rows of individual mounting surfaces 24 in the front-back direction. The individual mounting surfaces 24 near the center are surrounded by intersecting protrusions 25b. Furthermore, not all individual mounting surfaces 24 have legs 27. Even so, similar to the container 1 of the first embodiment, it is possible to prevent the sushi from shifting or moving, and to maintain a compact shape.

[0088] The configuration of the above embodiments is not listed as a limitation of the present invention. Changes can be made as long as the technical purpose is the same, and the present invention includes such changes.

Claims

1. A packaging container for sushi, formed of a synthetic resin sheet, having a plurality of individual holding surfaces on its bottom surface for holding individual sushi pieces, wherein, The packaging container for sushi has the following features: The peripheral wall portion is located around the bottom surface. The stepped portion is formed by creating a stepped boundary between the peripheral wall portion and the bottom portion, and by setting its upper surface as a stepped portion. A protruding section, which is set at the same height as the stepped surface, is provided around each of the individually placed surfaces; A recessed portion, formed by a portion around each of the individually placed facets at a height equal to or below the bottom facet; and The legs are formed by recessing the bottom surface downwards from within the separately mounted face. The protruding portion is configured to include parallel protruding portions and intersecting protruding portions. The parallel protruding portions extend continuously from the stepped portion and are arranged in a parallel manner. The intersecting protruding portions are arranged in an orientation orthogonal to the parallel protruding portions, and the width of the intersecting protruding portions is wider than the width of the parallel protruding portions. The recess is provided between the parallel protrusions and the intersecting protrusions. The sushi packaging container also has end protrusions that extend laterally in a tongue-like shape from the left and right edges of the container body.

2. The sushi packaging container according to claim 1, wherein, The recessed portion is located at an opposite position in each of the individually mounted surfaces.

3. The sushi packaging container according to claim 1 or 2, wherein, The leg is formed as a long, thin, straight concave section.

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