JP7626489B2 - Packaging containers - Google Patents

Description

The present invention relates to a packaging container capable of storing food, etc.

Conventionally, in various stores and the like that sell take-out food, various foods such as boxed lunches and prepared meals are sold in packaging containers. However, when food is placed on the bottom loading surface of the packaging container, the food appears to sink into the packaging container, losing its sense of volume and making the food look unattractive.

Various research and development efforts have been made to solve this problem. For example, Patent Document 1 discloses a food packaging container formed with a first protrusion and a second protrusion. Both the first protrusion and the second protrusion are formed to bulge on the upper surface side of the flat surface of the bottom. By serving food upright on the first protrusion, it is possible to prevent the food from appearing sunken, and by bringing the bottom end of the food served on the first protrusion into contact with the second protrusion, it is possible to prevent the food from shifting toward the front side wall of the outer periphery.

JP 2016-182988 A

However, when small foods are stored in the food packaging container disclosed in Patent Document 1, the bottom end of the food is separated from the second protruding portion when the food is placed on the first protruding portion, causing the food to shift toward the front side wall of the outer periphery. On the other hand, when large foods are stored in the above-mentioned food packaging container, although the bottom end of the food comes into contact with the second protruding portion when the food is placed on the first protruding portion, a large portion of the food protrudes above the top of the first protruding portion, resulting in an unbalanced appearance. Therefore, in order to improve the appearance of the food placed in the above-mentioned food packaging container and prevent shifting, the range of food sizes that can be stored in the food packaging container must be narrowed.

One aspect of the present invention was made in consideration of the above-mentioned problems, and aims to realize a packaging container that can improve the appearance of the food or other items contained therein and can accommodate a wider range of sizes of items than conventional containers.

A packaging container according to one aspect of the present invention comprises:
A packaging container comprising a bottom surface having a placement portion on which an object to be contained is placed, and a peripheral wall portion extending upward from the bottom surface,
The placement portion is
The bottom surface portion is raised upward,
A mounting inclined surface inclined in one direction;
A first support portion that bulges inward from the peripheral wall portion and is capable of supporting the contained object on the side wall portion;
a second support portion that is a rib-like protrusion located between a lower end of the loading inclined surface and the side wall portion and is capable of supporting the object to be stored;
A first height from a plane including the ground surface of the bottom portion to a first upper surface of the side wall portion is greater than a second height from the plane to a second upper surface of the second support portion.

According to the above configuration, the inclined loading surface and the second support part can support the contained object. Furthermore, since the first height is higher than the second height, even if the contained object climbs over the second upper surface and protrudes toward the peripheral wall part when placed on the inclined loading surface, the contained object can be supported by the inclined loading surface and the side wall part of the first support part. This widens the range of sizes of contained objects that can be stored in the packaging container, making it possible to store a greater variety of contained objects than conventional packaging containers.

Furthermore, according to the above configuration, the contained items are placed on the inclined placement surface. Therefore, compared to when the contained items are placed on a placement surface that is approximately parallel to the ground surface, the contained items are more likely to catch the consumer's eye and have a sense of volume. This improves the appearance of the contained items in the packaging container.

As one aspect of the present invention,
a connecting portion connecting the peripheral wall portion and the mounting inclined surface,
The connecting portion is
a connecting inclined surface that is inclined in the same direction as the inclined mounting surface and has a width narrower than that of the inclined mounting surface;
The connecting portion may have a connecting side wall portion located at one end on the side of the mounting inclined surface, the connecting side wall portion setting the position of the connecting inclined surface higher than the mounting inclined surface.

According to the above configuration, when the object to be contained is large enough to cover the side edge of the inclined mounting surface when placed on the inclined mounting surface, the object can be supported by the inclined mounting surface, either the first support part or the second support part, and the connecting side wall part. Furthermore, even if a gap is created between the object to be contained and the connecting side wall part when the object is placed on the inclined mounting surface, the movement of the object to be contained toward the connecting part is restricted by the connecting side wall part. As a result, the object to be contained can be stored more easily toward the center of the packaging container than if there were no connecting part, and the appearance of the object to be contained in the packaging container can be further improved.

Furthermore, according to the above configuration, the connecting inclined surface is inclined in the same direction as the loading inclined surface. Therefore, if the contained object is large enough that it protrudes from the side end and second surface of the loading inclined surface when placed on the loading inclined surface, the contained object can be supported by the connecting inclined surface in addition to the loading inclined surface and the first support part. As a result, when a relatively large contained object is contained in the packaging container, the contained object can be supported more stably than if there was no connecting part, and the good appearance of the contained object in the packaging container can be easily maintained.

Furthermore, according to the above configuration, the connecting inclined surface is narrower than the placing inclined surface. Therefore, if the contained item is, for example, oily or juicy food, the total amount of oil or broth adhering to each surface can be reduced compared to when the width of the placing inclined surface and the width of the connecting inclined surface are approximately the same. As a result, a larger amount of oil or broth can be discharged into the area between the periphery and the placing portion, etc., compared to when the width of the placing inclined surface and the width of the connecting inclined surface are approximately the same, and the amount of oil or broth that re-adheres to the contained item in the packaging container can be efficiently reduced.

As one aspect of the present invention,
The side wall portion has a side wall surface that comes into contact with the object to be contained and has a convex stripe shape,
The connecting side wall portion may have a connecting side wall surface that comes into contact with the contained object and has a convex stripe shape.

With this configuration, the total area of these surfaces, i.e., the total contact area with the contents, is smaller than when at least one of the inner wall surface and the connecting side wall surface does not have a convex shape (for example, a flat shape or a curved shape with a small curvature). Therefore, if the contents are, for example, oily or juicy food, the total amount of oil or soup adhering to at least one of the inner wall surface and the connecting side wall surface can be reduced.

In addition, on each of the inner wall surface and the connecting side wall surface, oil or soup stock from the contained items accumulates in the concave stripe-shaped portion, or flows out through the concave stripe-shaped portion into the area between the peripheral portion and the placement portion, etc. As a result, the amount of oil or soup stock that re-adheres to the contained items in the packaging container can be more efficiently reduced compared to when at least one of the inner wall surface and the connecting side wall surface does not have a convex stripe shape.

As one aspect of the present invention,
the placement portion further includes a non-placement inclined surface inclined in a direction opposite to a direction from an upper end to a lower end of the placement inclined surface,
A mounting-side inclined groove is formed on the mounting inclined surface so as to extend along a direction in which the mounting inclined surface is inclined,
a non-loading side inclined groove extending along a sloping direction of the non-loading inclined surface is formed on the non-loading inclined surface,
The placement-side inclined groove and the non-placement-side inclined groove may be in communication with each other.

According to the above configuration, if the contained object is, for example, an oily or juicy food, the oil or broth of the contained object can be collected in at least one of the placing side inclined groove and the non-placing side inclined groove. Alternatively, the oil or broth of the contained object can be discharged to the area between the peripheral portion and the placing portion through at least one of the placing side inclined groove and the non-placing side inclined groove, or through the non-placing inclined surface depending on the size of the contained object, etc. As a result, the amount of oil or broth that re-adheres to the contained object in the packaging container can be efficiently reduced compared to the absence of at least one of the non-placing inclined surface, the placing side inclined groove, and the non-placing side inclined groove.

According to one aspect of the present invention, it is possible to realize a packaging container that can improve the appearance of the contents and can accommodate a wider range of sizes of contents than conventional containers.

FIG. 1 is a plan view of a packaging container according to one embodiment of the present invention. 2 is a cross-sectional view of the packaging container shown in FIG. 1 taken along line II-II. Reference numeral 301 is a plan view showing a state in which a first food is contained in the packaging container shown in Fig. 1. Reference numeral 302 is a cross-sectional view taken along line III-III of the view shown by reference numeral 301. Reference numeral 401 is a plan view showing a state in which a second food is contained in the packaging container shown in Fig. 1. Reference numeral 402 is a cross-sectional view taken along line IV-IV of the view shown by reference numeral 402.

One embodiment of the present invention will be described in detail below with reference to Figs. 1 to 4. In this embodiment, a food packaging container that contains food such as boxed lunches and side dishes as the contents and does not have a lid will be described as an example of a packaging container according to one aspect of the present invention. However, the contents contained in the packaging container according to one aspect of the present invention are not limited to food. In addition, the packaging container according to one aspect of the present invention may be provided with a lid.

[Configuration of packaging container]
The configuration of a packaging container 1 according to one embodiment of the present invention will be described with reference to Figures 1 and 2. For ease of explanation, Figure 2 shows only the cross-sectional shape of the packaging container 1, and does not show the various parts on the depth side of the cross section of the packaging container 1. The same applies to reference numeral 302 in Figure 3 and reference numeral 402 in Figure 4.

The packaging container 1 is suitable for storing oily or juicy foods, although there are no particular limitations on the type of food that can be stored therein. Examples of oily foods include fried foods, hamburgers, steaks, and grilled fish. Examples of juicy foods include marinades and vinegared dishes. In this embodiment, a first food 70 and a second food 80 are given as examples of foods that can be stored in the packaging container 1 (see Figures 3 and 4; details will be described later). However, in the explanation in this section, the first food 70 and the second food 80 will be collectively referred to simply as "food".

In this embodiment, the packaging container 1 is formed by thermoforming a resin sheet having a sheet thickness of 0.1 mm to 4 mm, preferably 0.15 mm to 2.5 mm. As the resin sheet, for example, a thermoplastic resin sheet such as a polyolefin resin sheet, a polystyrene resin sheet, or a polyester resin sheet can be used. These resin sheets may be foamed sheets or non-foamed sheets. A laminated sheet can also be used as the resin sheet. As the laminated sheet, for example, a film-laminated foamed sheet in which a film is laminated on a foamed sheet, a co-extrusion laminate sheet, or an extrusion laminate sheet can be used. As the thermoforming method, for example, vacuum forming, thick air forming, vacuum pressure forming, and hot plate forming can be used.

Furthermore, in this embodiment, the color of the packaging container 1 is a single white color. However, the color of the packaging container 1 is not limited to this, and may be any color. Furthermore, the packaging container 1 may have a pattern. For example, the packaging container 1 may have a base color of black, and at least a portion of it may have a pattern of gold, red, or the like.

As shown in FIG. 1, the packaging container 1 has a rectangular shape in a plan view. Here, "rectangular" means a shape that can be regarded as rectangular when the packaging container 1 is viewed as a whole, that is, a substantially rectangular shape. Therefore, for example, the packaging container 1 may have a protruding portion on part of its outer edge, or may include a portion that forms a straight side. This also applies to shapes other than rectangular (for example, circular), and also to the shapes of each part that constitutes the packaging container 1 when viewed from any direction.

As shown in Figs. 1 and 2, the packaging container 1 has a bottom surface portion 2, a peripheral wall portion 3, a connecting portion 4, and a flange portion 5. The bottom surface portion 2 forms the bottom of the packaging container 1. The peripheral wall portion 3 is a portion that extends upward from the bottom surface portion 2. The connecting portion 4 is a portion that connects the peripheral wall portion 3 to the mounting inclined surface 221c described below. The flange portion 5 is a portion that extends outward from the upper end of the peripheral wall portion 3.

<Bottom part>
1 and 2, the bottom surface portion 2 has a bottom surface main body portion 21, a mounting portion 22, and a bottom groove portion 23. The bottom surface main body portion 21 is a flat plate-like portion, and has a rectangular outer shape in a plan view. The four corners of the bottom surface main body portion 21 are rounded.

The placement section 22 is the section on which food is placed, and is a section that protrudes upward from the bottom section 21. The placement section 22 has a placement main body section 220, a second support section 24, and a first support section 25. The placement main body section 220 is a section that protrudes upward from the top surface of the bottom main body section 21, and is a triangular prism-shaped section that extends laterally. In this specification, the horizontal direction refers to the direction from one short side section 552 of the outer edge section 55 (described in detail later) of the packaging container 1 to the other short side section 552 (see FIG. 1). The placement main body section 220 has a placement wall section 221, a non-placement wall section 222, and a placement side wall section 223.

The mounting wall portion 221 is a plate-like portion that is rectangular in plan view, and has a top wall 221a and an inclined wall 221b. The top wall 221a is located at the upper end of the mounting wall portion 221, and is a flat portion that is approximately parallel to the ground surface 233 described below. The inclined wall 221b is a flat portion whose upper end is connected to one of the longitudinal ends of the top wall 221a. The inclined wall 221b is inclined from its upper end to its lower end toward a first direction X (one direction). As shown in Figures 1 and 2, the first direction X is a direction from the upper end of the inclined wall 221b toward one of the long side portions 551 of the outer edge end portion 55. The lower end of the inclined wall 221b is connected to the base of the second support portion 24 on the inclined wall 221b side described below.

Food to be stored in the packaging container 1 is placed on either (i) the upper surface of the top wall 221a, (ii) the upper surface of the connecting portion between the top wall 221a and the inclined wall 221b, or (iii) the mounting inclined surface 221c of the inclined wall 221b, depending on the size of the food. Hereinafter, the upper surface of the connecting portion between the top wall 221a and the inclined wall 221b will be referred to as the "connecting upper surface." The mounting inclined surface 221c is the upper surface of the inclined wall 221b.

The non-placement wall portion 222 is a rectangular flat plate-shaped portion as shown in Figs. 1 and 2, and its upper end is connected to the other end of the longer side of the top wall 221a. The non-placement wall portion 222 is inclined from its upper end to its lower end toward the second direction Y. As shown in Figs. 1 and 2, the second direction Y is the direction from the upper end of the non-placement wall portion 222 toward the other long side portion 551 of the outer edge portion 55. In other words, the second direction Y is the opposite direction to the first direction X. This "opposite direction" does not require the opposite direction in the strict sense, but is a concept that allows for a roughly opposite direction.

Basically, food contained in the packaging container 1 is not placed on the non-placement inclined surface 222a of the non-placement wall portion 222. However, for example, if the food contained in the packaging container 1 is soft and large and placed on the placement inclined surface 221c, etc., part of the food may protrude from the top wall 221a and come into contact with the non-placement inclined surface 222a. In other words, there are cases where part of the food contained in the packaging container 1 is unintentionally placed on the non-placement inclined surface 222a. The non-placement inclined surface 222a is the upper surface of the non-placement wall portion 222.

Note that the first direction X, which is the inclination direction of the inclined wall 221b (i.e., the mounting inclined surface 221c), and the second direction Y, which is the inclination direction of the non-mounting wall portion 222 (i.e., the non-mounting inclined surface 222a), are merely examples. As long as the inclination direction of the non-mounting inclined surface 222a is opposite to the inclination direction of the mounting inclined surface 221c, the inclination directions of these surfaces can be changed as desired depending on the shape of the mounting main body portion 220, the positional relationships between the bottom main body portion 21 and the inclined wall 221b and the non-mounting wall portion 222, etc.

The placement side wall portion 223 is a triangular flat plate portion as shown in Figs. 1 and 2. The placement side wall portion 223 is connected to the short end portions of the top wall 221a, the inclined wall 221b, and the non-placement wall portion 222. In other words, the placement side wall portion 223 closes the space surrounded by the top wall 221a, the inclined wall 221b, and the non-placement wall portion 222 from the side. In this specification, the side refers to the short side portion 552 side of the outer edge portion 55 of the packaging container 1. The lower end of the placement side wall portion 223 is connected to the upper surface of the bottom main body portion 21.

The mounting wall portion 221 has a mounting side inclined groove 221d formed from the upper surface of the top wall 221a to the lower end of the mounting inclined surface 221c. The mounting side inclined groove 221d is a groove that extends along the inclination direction of the mounting inclined surface 221c, that is, the first direction X. In this embodiment, as shown in FIG. 1, four mounting side inclined grooves 221d are formed in the mounting wall portion 221.

Two of the four mounting side inclined grooves 221d are formed near both ends of the short side of the mounting wall 221, and the other two are formed near the center of the mounting wall 221. The two mounting side inclined grooves 221d formed near both ends of the short side of the mounting wall 221 are both formed at positions symmetrical with respect to a first central axis (not shown). The first central axis refers to the central axis of the mounting wall 221, and specifically refers to the central axis extending along the first direction X when the mounting wall 221 is viewed from a direction perpendicular to the mounting inclined surface 221c. In addition, the two mounting side inclined grooves 221d formed near the center of the mounting wall 221 are also formed at positions symmetrical with respect to the first central axis.

The non-loading wall portion 222 has a non-loading side inclined groove 222b formed from the upper end to the lower end of the non-loading inclined surface 222a. The non-loading side inclined groove 222b is a groove that extends along the inclination direction of the non-loading inclined surface 222a, that is, the second direction Y. In this embodiment, as shown in FIG. 1, four non-loading side inclined grooves 222b are formed in the non-loading wall portion 222.

Two of the four non-placement side inclined grooves 222b are formed near both ends of the short side of the non-placement wall portion 222, and the other two are formed near the center of the non-placement wall portion 222. The two non-placement side inclined grooves 222b formed near both ends of the short side of the non-placement wall portion 222 are formed at positions that are symmetrical with respect to a second central axis (not shown). The second central axis refers to the central axis of the non-placement wall portion 222, and specifically refers to the central axis extending along the second direction Y when the non-placement wall portion 222 is viewed from a direction perpendicular to the non-placement inclined surface 222a. In addition, the two non-placement side inclined grooves 222b formed near the center of the non-placement wall portion 222 are also formed at positions that are symmetrical with respect to the second central axis.

The four placement-side inclined grooves 221d and the four non-placement-side inclined grooves 222b function as flow paths through which the oil or broth from the food flows toward the bottom end of each groove, and serve to drain the oil or broth into the oil pool 234 described below. In this embodiment, the two placement-side inclined grooves 221d are located near both ends of the short side of the placement wall portion 221, and the two non-placement-side inclined grooves 222b are located near both ends of the short side of the non-placement wall portion 222, so that the oil or broth can be efficiently drained into the oil pool 234.

Each of the four placement side inclined grooves 221d is connected to a non-placement side inclined groove 222b (hereinafter, "corresponding non-placement side inclined groove 222b") that is formed at the same horizontal position in a plan view. Specifically, the placement side inclined groove 221d and the corresponding non-placement side inclined groove 222b are connected at the connection point between the top wall 221a and the non-placement wall portion 222. Here, "the same horizontal position in a plan view" does not mean that the positions in a plan view are completely the same, but is a concept that includes approximately the same positions that can be regarded as the same at a visual level. Since the placement side inclined groove 221d and the corresponding non-placement side inclined groove 222b are connected at the above-mentioned connection point, oil or soup stock from food adhering to the upper surface of the top wall 221a can be efficiently drained from the connection part between the two grooves to the placement side inclined groove 221d and the non-placement side inclined groove 222b.

As shown in Figs. 1 and 2, the second support portion 24 is a rib-like protrusion located between the lower end of the mounting inclined surface 221c and the side wall portion 61 described below. Specifically, as shown in Fig. 2, the second support portion 24 protrudes upward from the region between the lower end of the mounting inclined surface 221c and the side wall portion 61 on the upper surface of the bottom main body portion 21. In addition, the second support portion 24 extends laterally as shown in Fig. 1, and covers the openings on the lower end side of each of the four mounting side inclined grooves 221d.

The two end faces of the second support portion 24 are inclined so as to be inclined more toward the center of the second support portion 24 as they go upward. Therefore, when oil or soup stock from food flows from the upper part of the two inclined placement side grooves 221d formed near both ends of the short side of the placement wall portion 221 and overflows from the lower ends of the two inclined placement side grooves 221d, the oil or soup stock is easily guided to the oil pool 234. The second support portion 24 is a portion capable of supporting food placed on the placement portion 22, and is suitable for supporting small food items. Details of the manner in which the second support portion 24 supports food will be described later.

The bottom groove portion 23 is an annular portion formed to surround the outer edge of the bottom main body portion 21 and is continuous with the outer edge. As shown in FIG. 2, the bottom groove portion 23 is recessed downward from the upper surface of the bottom main body portion 21. In other words, the bottom groove portion 23 protrudes downward from the back surface of the bottom main body portion 21 and forms the leg of the packaging container 1.

The first support portion 25 is a portion that bulges inward from the peripheral wall portion 3 as shown in Figures 1 and 2, and is a portion that can support food with the first side wall portion 251 described below. In this specification, the inside refers to the center side of the packaging container 1. Specifically, as shown in Figure 1, the first support portion 25 bulges inward from the inner surface of the first peripheral wall portion 311 that faces the second support portion 24, out of the two first peripheral wall portions 311 in the first peripheral wall portion 31.

The first support portion 25 is a rectangular prism extending laterally as shown in FIG. 1 and FIG. 2, and its horizontal length is approximately the same as that of the second support portion 24. In this embodiment, the side wall portion of the first support portion 25 is composed of a first side wall portion 251 and two second side wall portions 252 as shown in FIG. 1. The second side wall portion 252 is a side wall portion located at the lateral end of the first support portion 25, and protrudes inward from the inner surface of the first peripheral wall portion 31. In this embodiment, the angle formed between the second side wall portion 252 and the inner surface of the first peripheral wall portion 31 is approximately 90°. The lower end of the second side wall portion 252 extends to the flat portion 232 of the bottom groove portion 23, and is continuous with the bottom groove side wall portion 231 and the flat portion 232.

The first sidewall portion 251 is a sidewall portion facing the second support portion 24, and is connected to the inner ends of each of the two second sidewall portions 252. The lower end of the first sidewall portion 251 is connected to one of the longitudinal ends of the bottom body portion 21 (the end closest to the second support portion 24). Details of how the first support portion 25 supports food will be described later.

The bottom groove portion 23 has a bottom groove side wall portion 231 and a flat portion 232. The bottom groove side wall portion 231 is a portion that extends downward from the back surface of the bottom main body portion 21, and forms the side wall of the bottom groove portion 23. In this embodiment, the inner surface of the outer side wall portion of the bottom groove side wall portion 231 has a convex strip shape in which multiple elongated convex areas extending in the vertical direction are formed over almost the entire surface. The flat portion 232 is a plate-shaped portion that is connected to the lower end of the bottom groove side wall portion 231, and its back surface forms the contact surface 233.

By having the bottom groove portion 23, the contact surface of the packaging container 1 becomes the contact surface 233, and the area of the contact surface of the packaging container 1 can be reduced. As a result, if the food contained in the packaging container 1 is warmer or colder than the temperature of the place in contact with the contact surface 233, the food is less likely to be affected by the temperature of the aforementioned place. Here, an example of the "place in contact with the contact surface 233" is the table on which the packaging container 1 is placed.

The space surrounded by the bottom groove side wall portion 231 and the flat portion 232 forms an oil reservoir 234. The oil reservoir 234 is a place for storing oil and soup stock from food, for example, the oil and soup stock that flows out from the lower ends of the four placement side inclined grooves 221d and the lower ends of the four non-placement side inclined grooves 222b. The formation of the oil reservoir 234 reduces the amount of oil or soup stock that flows out from the placement side inclined grooves 221d and non-placement side inclined grooves 222b remaining on the upper surface of the bottom main body portion 21 and re-adhering to food.

The configuration of the bottom surface portion 2 is not limited to the example of this embodiment. For example, the non-mounting wall portion 222 may be perpendicular to the bottom surface main body portion 21. Here, "perpendicular to the bottom surface main body portion 21" does not mean that the non-mounting wall portion 222 is completely perpendicular to the bottom surface main body portion 21, but is a concept that includes a substantially perpendicular angle that can be regarded as perpendicular at a visual level. For example, the mounting side inclined groove 221d and the non-mounting side inclined groove 222b may not be connected, and the number and the formation positions of the mounting side inclined groove 221d and the non-mounting side inclined groove 222b may be changed arbitrarily. Furthermore, at least one of the mounting side inclined groove 221d and the non-mounting side inclined groove 222b may not be formed. For example, the bottom surface portion 2 may not have a bottom groove portion 23. In this case, the back surface of the bottom surface main body portion 21 forms the ground surface.

<Peripheral wall>
1 and 2, the peripheral wall portion 3 is a frame-shaped portion extending upward from the outer edge of the bottom groove portion 23, and forms the peripheral wall of the packaging container 1. The space surrounded by the bottom portion 2 and the peripheral wall portion 3 forms the storage space for food in the packaging container 1. As shown in FIG. 2, the peripheral wall portion 3 has a first peripheral wall portion 31, an extension portion 32, and a second peripheral wall portion 33.

The first peripheral wall portion 31 is a frame-shaped portion extending upward from the upper end of the outer side wall portion of the bottom groove side wall portion 231, and is formed so as to widen outward as it moves upward. As shown in FIG. 1, the first peripheral wall portion 31 has two first peripheral wall portions 311 and two second peripheral wall portions 312. The first peripheral wall portion 311 is the peripheral wall portion on the long side of the first peripheral wall portion 31, and the second peripheral wall portion 312 is the peripheral wall portion on the short side of the first peripheral wall portion 31.

The inner surface of the first peripheral wall portion 31 has a convex stripe shape with multiple elongated convex areas extending in the vertical direction formed over almost the entire surface. The convex areas formed on the inner surface of the first peripheral wall portion 31 are connected to convex areas formed on the inner surface of the outer side wall portion of the bottom groove side wall portion 231. This allows, for example, when the food contained in the packaging container 1 is large enough to cover the entire bottom portion 2, oil or soup stock that flows out of the food to be collected in the groove formed between two adjacent convex areas, reducing the re-adhesion of oil or soup stock to the food. Note that the inner surface of the first peripheral wall portion 31 and the inner surface of the outer side wall portion of the bottom groove side wall portion 231 do not have to have a convex stripe shape, and may be, for example, flat.

The extension portion 32 is a plate-like portion that extends outward from the entire circumference of the upper end of the first peripheral wall portion 31. In a plan view, the extension portion 32 is annular as shown in FIG. 1. As shown in FIG. 2, the second peripheral wall portion 33 is a frame-like portion that extends upward from the outer end of the extension portion 32. In this embodiment, the angle between the extension portion 32 and the second peripheral wall portion 33 is approximately 90°. Note that the peripheral wall portion 3 does not necessarily have to have the extension portion 32 and the second peripheral wall portion 33.

<Connection>
1, the connecting portion 4 is a portion extending inward from each of the two second peripheral wall portions 312 of the first peripheral wall portion 31, and an inner end portion is connected to the mounting side wall portion 223 and the mounting inclined surface 221c. In this embodiment, the connecting portion 4 has a first connecting portion 41 and a second connecting portion 42.

The first connecting portion 41 is a portion that extends inward from the lower peripheral wall portion of the second peripheral wall portion 312, and its inner end portion is connected to the placement side wall portion 223. The lower ends of the two side wall portions of the first connecting portion 41 extend to the flat portion 232 of the bottom groove portion 23, and are connected to the bottom groove side wall portion 231 and the flat portion 232.

The second connecting portion 42 is a portion that protrudes upward from the upper surface of the first connecting portion 41. The outer end of the second connecting portion 42 is connected to the upper peripheral wall portion of the second peripheral wall portion 312, and the inner end is connected to the mounting side wall portion 223 and the mounting inclined surface 221c. The inner end of the second connecting portion 42 includes the connecting side wall portion 421. The connecting side wall portion 421 is located at one end of the second connecting portion 42 on the mounting inclined surface 221c side, and is a side wall portion that protrudes upward from the end area on the short side of the mounting inclined surface 221c. The connecting side wall portion 421 is formed so as to incline inward as it approaches the top wall 221a side. In addition, the connecting side wall portion 421 is formed so as to incline outward as it approaches the end portion on the connecting inclined surface 424 (details will be described later) side from the connection point with the mounting inclined surface 221c.

The connecting side wall surface 422, which is the side wall surface of the connecting side wall portion 421, is the surface that comes into contact with the food depending on the size of the food contained in the packaging container 1. The connecting side wall surface 422 has a convex stripe shape with multiple elongated convex areas extending in the vertical direction formed over almost the entire surface. Note that the connecting side wall surface 422 does not have to have a convex stripe shape, and may be, for example, a flat shape.

The upper surface of the second connecting portion 42 forms the upper surface of the connecting portion 4, and has a connecting top surface 423 and a connecting inclined surface 424. The connecting top surface 423 is a triangular surface in a plan view that is connected to the upper end of the second peripheral wall portion 312 and is approximately parallel to the ground surface 233. The connecting inclined surface 424 is a surface that is inclined in the same direction as the first direction X, which is the inclination direction of the mounting inclined surface 221c, and is connected to both the upper end of the second peripheral wall portion 312 and the connecting side wall portion 421. The upper end region of the connecting inclined surface 424 is connected to the connecting top surface 423. From the positional relationship between the connecting inclined surface 424 and the connecting side wall portion 421 as described above, it can be said that the connecting side wall portion 421 makes the position of the connecting inclined surface 424 higher than the mounting inclined surface 221c.

In this embodiment, the inclination angle of the connecting inclined surface 424 is approximately the same as the inclination angle θ of the mounting inclined surface 221c (see FIG. 2). The inclination angle θ is the angle between the mounting inclined surface 221c and a virtual plane that includes the lower end of the mounting inclined surface 221c and is parallel to the ground surface 233. However, as long as the connecting inclined surface 424 is inclined in the same direction as the first direction X, its inclination angle may be different from the inclination angle θ of the mounting inclined surface 221c at the visual level.

The connecting inclined surface 424 has a lateral width W41 narrower than the lateral width W21 of the mounting inclined surface 221c. Also, the connecting inclined surface 424 has a slant width W42 narrower than the slant width W22 of the mounting inclined surface 221c. In other words, the area of the connecting inclined surface 424 is smaller than the area of the mounting inclined surface 221c. This reduces the amount of oil or broth from the food adhering to the connecting inclined surface 424, and only the reduced amount is drained into the oil pool 234, allowing the oil or broth to be efficiently drained into the oil pool 234.

The connecting inclined surface 424 only needs to have an area smaller than the area of the mounting inclined surface 221c, and it is not necessary for both widths W41 and 42 to be narrower than the corresponding widths of the mounting inclined surface. The connecting portion 4 may have any shape as long as the area of the connecting inclined surface 424 is smaller than the area of the mounting inclined surface 221c. However, from the viewpoint of efficiently discharging oil or soup stock from food into the oil pool 234, it is preferable that at least width W41 is narrower than width 21. Furthermore, the packaging container 1 does not need to have a connecting portion 4.

<Flange>
The flange portion 5 is a portion extending outward from the upper end of the second peripheral wall portion 33 as shown in Fig. 2. The flange portion 5 has an inner flange wall 51, an inner peripheral flange portion 52, an outer flange wall 53, an outer peripheral flange portion 54, and an outer edge portion 55. The inner flange wall 51 is a plate-shaped portion extending upward from the entire circumference of the upper end of the second peripheral wall portion 33. The inner flange wall 51 is formed so as to widen outward as it moves upward. The inner peripheral flange portion 52 is a frame-shaped portion extending outward from the upper end of the inner flange wall 51. The upper surface of the inner peripheral flange portion 52 forms the upper end surface of the packaging container 1.

The outer flange wall 53 is a portion that extends downward from the entire circumference of the outer end of the inner flange portion 52. The outer flange wall 53 is formed so as to widen outward as it approaches the lower side. The outer flange portion 54 is a plate-shaped portion that extends outward from the entire circumference of the lower end of the outer flange wall 53. The outer flange portion 54 is formed so as to incline more downward as it approaches the outside. In other words, the flange portion 5 has a two-stage structure with the inner flange portion 52 on the inner circumference side and the outer flange portion 54 on the outer circumference side.

The annular convex portion in plan view, which is composed of the second peripheral wall portion 33, the inner flange wall 51, the inner peripheral flange portion 52, and the outer flange wall 53, can be fitted into an internal fitting portion of a lid body (not shown) if the lid body has the internal fitting portion. In other words, the packaging container 1 is configured to be able to be internally fitted into the lid body.

The outer edge portion 55 is a frame-shaped portion extending downward from the lower end of the outer peripheral flange portion 54. The lower end of the outer edge portion 55 is bent so that the tip faces outward over the entire circumference. As shown in FIG. 1, the lower end of the outer edge portion 55 has two long sides 551 and two short sides 552. The long sides 551 are the long side portions at the lower end of the outer edge portion 55, and the short sides 552 are the short side portions at the lower end of the outer edge portion 55. The connecting portions between the long sides 551 and the short sides 552 have a rounded shape in plan view. The tip of the lower end of the outer edge portion 55 forms the outer shape of the packaging container 1 in plan view. In addition, the connecting portion 56 between the outer peripheral flange portion 54 and the outer edge portion 55 protrudes outward over the entire circumference as shown in FIG. 2.

When a lid (not shown) has an external fitting portion, the outer edge 55 is covered by the external fitting portion from the outside and abuts against the inner surface of the external fitting portion, thereby allowing it to be externally fitted to the external fitting portion. In other words, the packaging container 1 is configured so that it can be externally fitted to the lid. In this way, since the packaging container 1 is configured so that it can be internally and externally fitted to the lid, a lid with an appropriate fitting mode can be fitted to the packaging container 1 depending on the size of the food to be stored, etc. In addition, since the connecting portion 56 protrudes outward, the lid that is externally fitted to the packaging container 1 is less likely to come off the packaging container 1, and the lid can be stably fixed to the packaging container 1.

As shown in FIG. 1, the outer edge 55 has two receiving pieces 57 at the lower end. Specifically, one receiving piece 57 is formed by extending outward from one of the four corners of the lower end. The other receiving piece 57 is formed by extending outward from one of the four corners of the lower end that is diagonally positioned in a plan view from the corner where the aforementioned one receiving piece 57 is formed. The receiving piece 57 is a flat plate-shaped part, and has a rounded tip in a plan view. The two receiving pieces 57 have a raised portion 571. The raised portion 571 is raised so as to be convex upward from the top surface of the receiving piece 57, and is formed near the tip of the receiving piece 57.

When a gripping portion (not shown) is formed on the peripheral wall of a lid body having an external fitting portion, the receiving piece 57 and the gripping portion can be made to overlap in a plan view when the lid body is externally fitted to the packaging container 1. The receiving piece 57 and the gripping portion overlap to form an opening portion. The opening portion is a portion for gripping when removing the lid body from the packaging container 1. In this case, since the receiving piece 57 has a raised portion 571, the gripping portion is formed with a storage portion for storing the raised portion when the receiving piece 57 and the gripping portion are overlapped. Since the storage portion stores the raised portion 571 when the lid body is externally fitted to the packaging container 1, it is possible to reduce the positional displacement of the lid body along the outer surface of the outer edge portion 55, and the fitting state between the lid body and the packaging container 1 can be stabilized.

The receiving piece 57 does not have to have the raised portion 571. In addition, the number and the formation position of the receiving piece 57 can be arbitrarily changed in design. Furthermore, the outer edge end portion 55 does not have to have the receiving piece 57. The flange portion 5 does not have to have a shape that can be used for both internal and external fitting of the lid body as in this embodiment, but only needs to have a shape that can be used for either the internal fitting or the external fitting of the lid body. Alternatively, the shape of the flange portion 5 does not have to be compatible with either the internal fitting or the external fitting of the lid body.

[First food storage mode]
The manner in which the first food 70 is contained in the packaging container 1 will be described with reference to Fig. 3. The first food 70 is a relatively large food, and is large enough to cover almost the entirety of both of the two connecting inclined surfaces 424 when contained in the packaging container 1, as shown by reference numeral 301 in Fig. 3. The length of the longitudinal side of the first food 70 is long enough to fit into the space between the first support portion 25 and the end of the longitudinal side of the bottom body portion 21 on the non-placement wall portion 222 side when the first food 70 is contained in the packaging container 1. Examples of the first food 70 include jumbo croquettes, jumbo fillet cutlets, hamburger steaks, and fried horse mackerel.

When the first food 70 is stored in the packaging container 1, the first food 70 is placed on the placement portion 22 and supported by the first support portion 25. When the first food 70 is stored in this manner, the first food 70 is stored in the packaging container 1 in the manner shown in FIG. 3. Specifically, one of the longitudinal ends of the first food 70 is placed on the connecting upper surface as shown by reference numeral 302 in FIG. 3. The other longitudinal end of the first food 70 abuts against the side wall surface 251a of the first side wall portion 251, so that the first food 70 is supported by the first support portion 25. Furthermore, the first food 70 abuts against a part of the second upper surface 241 of the second support portion 24, so that the first food 70 is also supported by the second support portion 24. Hereinafter, the storage state of the first food 70 shown in FIG. 3 is referred to as the "first storage state".

Here, of the height Ht of the top wall 221a, the first height H1 of the first sidewall portion 251, and the second height H2 of the second support portion 24, the height Ht is the highest and the second height H2 is the lowest. The height Ht is the shortest distance from the plane P to the upper surface of the top wall 221a. The first height H1 is the shortest distance from the plane P to the first upper surface 251b of the first sidewall portion 251. The second height H2 is the shortest distance from the plane P to the second upper surface 241 of the second support portion 24. The plane P is an imaginary plane that includes the ground surface 233.

The height Ht' of the connecting top surface is approximately the same as the height Ht, and is slightly lower than the height Ht. The height Ht' is the shortest distance from the imaginary plane P to the center of gravity of the connecting top surface. Therefore, among the height Ht', the first height H1, and the second height H2, the height Ht' is the highest.

Since the height Ht', the first height H1, and the second height H2 are in the relationship described above, the first food 70 in the first storage state is maintained by the first support portion 25 in a state inclined in the same direction as the first direction X (see FIG. 1). In the first storage state, when the first food 70 is viewed from a direction opposite the inclined placement surface 221c, the first food 70 appears to be floating in the packaging container 1. This state is also maintained by the first support portion 25. This gives the first food 70 a sense of volume in the packaging container 1, improving its appearance.

In this embodiment, the side wall surface 251a is inclined so that it spreads outward as it goes upward. In addition, the side wall surface 251a is inclined so that the angle between the contact surface of the first food 70 and the side wall surface 251a is approximately 90° in the first storage state. The contact surface of the first food 70 is the surface that contacts the connecting upper surface of the first food 70 and a part of the second upper surface 241 in the first storage state. This allows the support force of the first side wall portion 251 to act efficiently on the first food 70 in the first storage state, stabilizing the first storage state. In addition, in this embodiment, as shown by the reference numeral 301 in FIG. 3, the first side wall portion 251 and the second support portion 24 are approximately parallel in a plan view. This also stabilizes the first storage state.

Furthermore, in this embodiment, the upper surface of the first support portion 25 has a stepped shape in which the first upper surface 251b is higher than the other upper surface portions. This allows the oil or soup stock that flows out of the first food 70 to be collected in the other upper surface portions, or to be drained into the oil pool 234 from the side edge of the other upper surface portions, further reducing the re-adhesion of the oil or soup stock to the first food 70.

The side wall surface 251a has a convex stripe shape with multiple elongated convex areas extending in the vertical direction formed over almost the entire surface. The upper ends of these convex areas extend to the first upper surface 251b of the first side wall portion 251, and the lower ends extend to the connection point between the first side wall portion 251 and the bottom body portion 21. This allows the oil or soup stock that flows out of the first food 70 in the first storage state to be efficiently collected in the groove or oil pool 234 formed between two adjacent convex areas. This effectively reduces the re-adhesion of oil or soup stock to the first food 70.

In addition, in the first storage state, as shown by reference numeral 301 in FIG. 3, both ends of the short sides of the first food 70 are placed on the upper area of the connecting inclined surface 424. In other words, in the first storage state, the first food 70 is also supported by the connecting portion 4. This makes the first storage state even more stable.

The above-described first storage mode and the configuration of the first support portion 25 are merely examples. Even when a relatively large food such as the first food 70 is stored in the packaging container 1, the surfaces of the connecting portion 4 and the placement portion 22 on which the food is placed, as well as the area of the side wall surface 251a and the area of the second upper surface 241 that come into contact with the food, will vary depending on the size and shape of the food.

The side wall of the first support portion 25 does not have to be composed of the first side wall portion 251 and the two second side wall portions 252 as in this embodiment, and may be composed of the first side wall portion 251 having an elliptical arc shape in a plan view, for example. In this case, the side wall surface of the side wall of the first support portion 25 is composed of the side wall surface 251a of the first side wall portion 251. Furthermore, the first height H1 does not have to be lower than the height Ht, and may be equal to or higher than the height Ht. However, if the first height H1 is equal to or higher than the height Ht, there is a risk that the first support portion 25 may make it difficult to see the end of the first food 70 on the side supported by the first support portion 25. Considering this, it is preferable that the first height H1 is lower than the height Ht.

Furthermore, the sidewall portion of the first support portion 25 may be formed by a first sidewall portion 251 in which the first upper surface 251b is uneven when viewed from the front, for example. In this case, the height from the plane P to the first upper surface 251b will be different between the convex and concave areas of the first upper surface 251b. In this case, the shortest distance from the plane P to the uppermost surface of the first upper surface 251b may be defined as the first height H1. The "uppermost surface of the first upper surface 251b" is specifically the upper surface portion of the convex area of the first upper surface 251b.

[Second food storage mode]
The manner in which the second food 80 is contained in the packaging container 1 will be described with reference to FIG. 4. The second food 80 is a relatively small food, as shown by reference numeral 401 in FIG. 4, and is large enough to be placed on the placement section 22 in a plurality of pieces. The length of the longitudinal side of the second food 80 is long enough to fit in the space between the second support section 24 and the lower end of the non-placement inclined surface 222a when a plurality of the second food 80 are placed in the packaging container 1. Examples of the second food 80 include mini croquettes, mini fillet cutlets, and mini hamburgers. In the example of FIG. 4, five pieces of the second food 80 are placed on the placement section 22, but this number is merely an example.

When the second food 80 is stored in the packaging container 1, multiple pieces of the second food 80 are placed on the placement portion 22 and supported by the second support portion 24. When the second food 80 is stored in this manner, the second food 80 is stored in the packaging container 1 in the manner shown in FIG. 4. Specifically, as shown by reference numeral 402 in FIG. 4, substantially the entire surface of the placement inclined surface 221c is in contact with the second food 80. In addition, the second food 80 is supported by the second support portion 24 as one of the ends on the short side is in contact with the side wall surface 242 of the second support portion 24. Hereinafter, the storage state of the second food 80 shown in FIG. 4 is referred to as the "second storage state."

In the second storage mode, as shown by reference numeral 402 in FIG. 4, the tip of the second food 80 protrudes outward from the connecting portion between the top wall 221a and the non-mounting wall portion 222. Furthermore, of the plurality of second foods 80, the two second foods 80 stored on the outermost sides have one of their longitudinal ends abutting a part of the connecting side wall surface 422, as shown by reference numeral 401 in FIG. 4. Furthermore, the plurality of second foods 80 are in a state in which two adjacent second foods 80 are in contact with each other at their longitudinal ends.

In this embodiment, the side wall surface 242 is inclined so that it widens outward as it approaches the upper side. The side wall surface 242 is inclined so that the angle between the contact surface of the second food 80 and the side wall surface 242 is approximately 90° in the second storage mode. The contact surface of the second food 80 is the surface that contacts the inclined placement surface 221c of the second food 80 in the second storage mode. This allows the supporting force of the second support portion 24 to act efficiently on the second food 80 in the second storage mode, stabilizing the second storage mode.

In addition, in this embodiment, the side wall surface 242 has a flat shape as shown by reference numeral 301 in FIG. 4. This increases the contact area between the second food 80 and the side wall surface 242, making the second storage mode more stable. Here, the side wall surface 242 may have a convex strip shape in which multiple elongated convex areas extending in the vertical direction are formed over substantially the entire surface. In this case, the oil or soup stock that flows out from the second food 80 in the second storage state can be collected in a groove formed between two adjacent convex areas, or can be efficiently discharged into the oil pool 234 from both ends of the second support portion 24. This effectively reduces the re-adhesion of the oil or soup stock to the second food 80.

The second storage mode and the configuration of the second support portion 24 described above are merely examples. For example, in the second storage mode, one of the longitudinal ends of the two outermost stored second foods 80 may be spaced from the connecting side wall surface 422. Also, in the second storage mode, two adjacent second foods 80 may not be in contact with each other at their longitudinal ends. Even in these storage modes, the two connecting side walls 421 can prevent the multiple second foods 80 from moving unintentionally in the lateral direction. However, from the viewpoint of stabilizing the second storage mode, it is preferable that the multiple second foods 80 are stored as in the example shown in FIG. 4.

As described above, the packaging container 1 can accommodate a wide range of sizes of food items, from large items such as the first food 70 to small items such as the second food 80. It is particularly suitable for foods of the same type that come in different sizes, such as croquettes, pork fillet cutlets, and hamburger steaks. This eliminates the need to manufacture many different types of packaging containers according to the size of the items to be accommodated, and reduces the inventory of packaging containers. This reduces plastic waste and contributes to the achievement of the Sustainable Development Goals (SDGs). For example, the packaging container 1 can contribute to the achievement of three of the 17 SDGs: "3. Good health and well-being for all," "14. Protect and sustainably use marine resources," and "15. Ensure and sustain life on land."

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments.

REFERENCE SIGNS LIST 1 Packaging container 2 Bottom surface portion 3 Peripheral wall portion 4 Connecting portion 24 Second support portion 25 First support portion 70 First food (content)
80 Second food (contained items)
221c: Placement inclined surface 221d: Placement-side inclined groove 222a: Non-placement inclined surface 222b: Non-placement-side inclined groove 233: Ground surface 241: Second upper surface 251: First side wall portion (side wall portion)
251a Side wall surface 251b First upper surface 421 Connecting side wall portion 422 Connecting side wall surface 424 Connecting inclined surface H1 First height H2 Second height P Plane W41, W42 Width

Claims (3)

A packaging container comprising a bottom surface having a placement portion on which an object to be contained is placed, and a peripheral wall portion extending upward from the bottom surface,
The placement portion is
The bottom surface portion is raised upward,
A mounting inclined surface inclined in one direction;
A first support portion that bulges inward from the peripheral wall portion and is capable of supporting the contained object on the side wall portion;
a second support portion that is a rib-like protrusion located between a lower end of the loading inclined surface and the side wall portion and is capable of supporting the object to be stored;
a first height from a plane including a ground surface of the bottom portion to a first upper surface of the side wall portion is greater than a second height from the plane to a second upper surface of the second support portion;
the placement portion further includes a non-placement inclined surface inclined in a direction opposite to a direction from an upper end to a lower end of the placement inclined surface,
A mounting-side inclined groove is formed on the mounting inclined surface so as to extend along a direction in which the mounting inclined surface is inclined,
a non-loading side inclined groove extending along a sloping direction of the non-loading inclined surface is formed on the non-loading inclined surface,
A packaging container, wherein the placement-side inclined groove and the non-placement-side inclined groove are in communication with each other. a connecting portion connected to the peripheral wall portion and the mounting inclined surface,
The connecting portion is
a connecting inclined surface that is inclined in the same direction as the inclined mounting surface and has a width narrower than that of the inclined mounting surface;
2. The packaging container according to claim 1, further comprising a connecting side wall portion located at one end of the connecting portion on the side of the inclined mounting surface, the connecting side wall portion setting the position of the connecting inclined surface higher than the inclined mounting surface. The side wall portion has a side wall surface that comes into contact with the object to be contained and has a convex stripe shape,
3. The packaging container according to claim 2, wherein the connecting side wall portion has a connecting side wall surface that comes into contact with the contents formed in a ridge shape.

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