JP3236821U - Food packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food packaging container which eliminates uneven heating when heating in a microwave oven, improves heating efficiency, and enables appropriate heating in a shorter time. SOLUTION: In a food packaging container 11 having at least one storage recess 12 for storing food, a plurality of linear bulging portions 14 bulging upward are formed on an inner bottom surface 13 of the storage recess 12. do. The bulging portions 14 are orthogonal to each other to provide an intersecting portion 15, and a hollow portion 16 is formed under the bulging portion 14 including the intersecting portion 15 to improve heating to the bottom surface of the food and heat conduction to the surroundings. do. [Selection diagram] Fig. 1

Description

This invention relates to a packaging container used for packaging foods such as lunch boxes, delicatessen items, frozen foods, frozen lunch boxes, and more specifically, food packaging suitable for packaging foods to be eaten by heating with a microwave oven or the like. Regarding the container.

The microwave oven heats the food by causing the microwave generated in the microwave oven to act on the food. Microwaves are repeatedly reflected and act in the refrigerator, but the bottom of the food is difficult to heat and uneven heating is likely to occur in the food. In order to avoid such inconvenience, it is known that, for example, disposable chopsticks may be sandwiched under the food to float the food.

As a container utilizing this, there is a container in which a convex portion convex downward or upward is formed at the bottom of the storage recess for storing food.

Examples of the container having a convex portion downward include the food packaging container of Patent Document 1 below. This container is provided with a plurality of rows of ridges radially outward from the vicinity of the center point of the bottom on the back surface of the bottom of the container so that the entire food can be heated uniformly. Patent Document 2 below discloses a container having a hollow protrusion having a shape partially spherical and a depth of 3 mm or more, which protrudes outward and accommodates the contents of the container at the bottom of the container. ..

However, in a container having a convex portion protruding downward, the bottom of the container rises as a whole, the height of the container becomes high, and the capacity decreases in spite of the height. In addition, food gets into the inside of the convex portion, and the food in that portion is difficult to eat and remains.

On the other hand, if the container has a convex portion on the upper side, the above-mentioned inconvenience can be eliminated. As such a container, there is a container for a microwave oven of Patent Document 3 below. This container has a structure in which a hemispherical convex portion is projected from the center of the inner bottom. With this configuration, the microwave electric field, which tends to be partially concentrated, is dispersed around the center and corners of the container body to perform uniform heating.

The following Patent Document 4 has a configuration in which a convex portion extending linearly is arranged in parallel with the bottom of the container and the food is supported only by the apex of the convex portion. In this configuration, the food is uniformly heated because the portion where the food and the convex portion are in contact is small. The following Patent Document 5 has a large number of hemispherical protrusions formed on the bottom of the container. In this configuration, since the entire surface of the food does not come into contact with the tray, the influence of the moisture released from the food is extremely small, the entire food can be heated evenly, and the water that has fallen to the bottom of the tray is heated to become high-temperature steam. It is said that food can be steamed.

Japanese Unexamined Patent Publication No. 2007-8568 Japanese Patent No. 4224653 Jikkenhei 4-80427 Gazette Jikkenhei 6-80679 Gazette Japanese Unexamined Patent Publication No. 2018-79979

However, the convex portion of Patent Document 3 is hemispherical, and even if the portion corresponding to the convex portion in the food material is well heated, that portion is a point, and the spread as a surface of heat cannot be expected.

Even when a plurality of convex portions are provided as in Patent Documents 4 and 5, these convex portions support the food at smaller points, and the spread as a heat surface is similar to the configuration of Patent Document 3. I can't hope.

Also, the heating time in the microwave is proportional to the weight. For this reason, if there is uneven heating, the whole can be heated by further heating, but in that case, not only the container is burdened and deformation occurs, but also depending on the food. Will degrade the quality.

Therefore, the main purpose of this invention is to eliminate uneven heating and improve the heating efficiency so that appropriate heating can be performed in a shorter time.

As a means for that, in a food packaging container having at least one storage recess for storing food, a plurality of bulging portions bulging upward are formed on the inner bottom surface of the storage recess, and the bulging portions are formed with each other. An intersecting intersection is provided, and a cavity is formed under the bulge including the intersection.

In this configuration, the height of the food contained in the accommodating recess is raised so that the bulge and the intersection having the cavity underneath allow the bottom surface of the food to be well heated. Since the bulging portion extends from the intersection in a plurality of directions, the heat generated by the heating is spread to the surroundings, and efficient heating by heat conduction is possible.

According to this invention, since the bulge and the intersection are formed on the inner bottom surface of the accommodating recess, heating to the bottom surface of the food is promoted, and the bulge extending from the intersection promotes heat conduction to the surroundings and heats. Spread the action as a surface. Therefore, efficient heating can be performed without uneven heating. Further, for example, when the food has a plurality of storage recesses, the way the food is heated is adjusted by changing the mode of the bulging portion and the intersection for each storage recess, and more appropriate heating is performed for each food. Will be possible.

A perspective view of a food packaging container. Top view of the main part. 2A cross-sectional view and BB cross-sectional view of FIG. The plan view which shows an example of the aspect of the bulging part and the intersection part. The plan view which shows an example of the aspect of the bulging part and the intersection part. The plan view which shows an example of the aspect of the bulging part and the intersection part. Sectional drawing which shows the structure of the end part of a bulge part. Sectional drawing which shows the structure of the end part of a bulge part.

An embodiment for carrying out this device will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a food packaging container 11 suitable for packaging foods such as lunch boxes, delicatessen items, and frozen lunch boxes. The food packaging container 11 is formed by molding a synthetic resin sheet that can be heated in a microwave oven, and has at least one storage recess 12 for storing food.

The food packaging container 11 in the illustrated example is an example, and is drawn so that the storage recess 12 is one, but it has a plurality of storage recesses 12 divided by a partition and is divided into a main dish and a side dish. It may be one that can be accommodated. The plan view shape of the food packaging container 11 is not limited to the square shape as shown in the illustrated example, but may be a circular shape, an elliptical shape, an oval shape, or any other shape, and the depth of the food packaging container 11 accommodates pasta, curry, and the like. It may be a deep one suitable for use.

The opening on the upper surface of the food packaging container 11 is closed by fitting a lid member (not shown) or attaching a lid film (not shown) after storing the food, and if necessary, the packaging bag (not shown). ) Will be provided.

As shown in an enlarged view of a part of the inner bottom surface 13 of the storage recess 12 in FIG. 1, the food packaging container 11 is formed with a plurality of bulging portions 14 that bulge upward and bulge. An intersection 15 where the portions 14 intersect with each other is provided. A cavity 16 is formed under the bulge 14 including the intersection 15.

FIG. 2 is a plan view showing the bulging portion 14 and the intersection portion 15 centered on the intersection portion 15, and FIG. 3A is a cross-sectional view taken along the line AA of FIG. 2, that is, the center of the intersection portion 15. It is sectional drawing which cut along the longitudinal direction of the bulging part 14. FIG. 3B is a cross-sectional view taken along the line BB of FIG. 2, that is, a state in which the bulging portion 14 is crossed in a direction orthogonal to the bulging portion 14 and the bulging portion 14 extending with the intersection 15 is viewed in the background. It is a sectional view.

As shown in these figures, the vertical cross-sectional shape of the bulging portion 14 is an arc shape. Further, the intersecting portion 15 is composed of bulging portions 14 orthogonal to each other, and the portion centered on the intersecting portion 15 is a cruciform in a plan view as a whole. The bulging portions 14 at the intersection 15 are continuous in a circular arc in a plan view.

Regarding the size of the bulging portion 14, the width W of the bulging portion 14 is set to be larger than the height H of the cavity portion 16, and more specifically, the width W of the bulging portion 14 is the height of the cavity portion 16. It is more than twice the height of H.

That is, as shown in FIG. 3B, the vertical cross-sectional shape cut in the direction orthogonal to the longitudinal direction of the bulging portion 14 is an arc shape as described above, and both ends thereof are interposed via the arc portion 14a. It is continuous with the flat part of the inner bottom surface 13. The two intersecting bulges 14 are linear and their heights are the same. Therefore, as shown in FIG. 3A, the upper surface of the bulging portion 14 is flat and horizontally extends even at the intersecting portion 15.

Since the width W of the bulging portion 14 is more than twice the height H of the cavity portion 16, the bulging portion 14 is generally flatter than the one having an aspect ratio such as a general bulging rib.

The height H of the cavity 16 is a height that promotes heating of the bottom surface of the food stored in the storage recess 12, and a height of several mm to 5 mm is sufficient. It may be higher than that, but if it is too high, it may hinder the storage of foods such as delicatessen. When the height H of the cavity 16 is about several mm to 5 mm, the width W of the bulge portion 14 is about 5 mm to 10 mm or about 10 mm.

The bulging portion 14 having such a shape and size is not a mode in which the food is supported and floated, but a contact area with the food is taken and the bulging portion 14 is supported in a state of being familiar with the shape of the food. Further, the bulging portion 14 does not catch the tip of the chopsticks when taking food with chopsticks, so that a natural meal is possible.

Since the intersecting portion 15 has a form in which the linear bulging portions 14 are orthogonal to each other, the distance between both side portions of the bulging portions 14 extending around the intersecting portion 15 in the circumferential direction is uniform, and the bulging portions 14 are spaced apart from each other. The shapes of the arcuate corners 14b in the plan view are the same as each other.

One intersecting portion 15 composed of such a bulging portion 14 may be formed for one accommodating recess 12, but the number of intersecting portions 15 may be determined according to the size of the accommodating recess 12 and the food to be accommodated. Set. That is, when the inner bottom surface 13 is wide, the portion that is normally difficult to be heated is wide, so that the number of intersections 15 is increased as compared with the case where the inner bottom surface 13 is narrow. Further, the storage recess 12 for storing food to be heated better, such as the storage recess 12 for storing the main dish, increases the number of intersections 15.

FIG. 4 is a plan view showing an example of forming a plurality of intersections 15, and the two intersections 15 are arranged in a straight line.

FIG. 5 is a plan view showing an example of forming the four intersections 15, and the four intersections 15 are arranged in a grid pattern or a grid pattern having one eye. FIG. 5A is an example in which the eyes are made rectangular by making the intervals of the intersections 15 different in the vertical and horizontal directions, and FIG. 5B is an example in which the eyes are made square by arranging them at equal intervals in the vertical and horizontal directions. The size of the eyes may be set in consideration of the thickness and height of the bulging portion 14, and it is preferable that the eye portions do not become small dents for which cooked rice or the like can enter.

FIG. 6 shows an example in which four or more intersecting portions 15 are arranged in a grid pattern. FIG. The eyes are squared by arranging them at intervals.

As shown in these examples, the bulge 14 and the intersection 15 are formed in various ways. Although not shown, the intersecting portions 15 may be arranged in a staggered pattern, for example, instead of being formed in a manner in which the intersecting portions 15 are connected by the bulging portions 14 as described above.

The end portion of the bulging portion 14 is preferably formed as shown in FIG. 7. That is, the bulging portion 14 is extended to the lower part of the side wall portion 12a of the accommodating recess 12, and the cavity portion 16 is opened to communicate with the outside.

Further, in this case, as shown in FIG. 8, it is preferable to provide the outer ribs 17 projecting downward in the bulging portion 14 at the portion corresponding to the end portion of the inner bottom surface 13 of the accommodating recess 12. It is preferable that the outer rib 17 is provided at an appropriate distance from the bulging portion 14. The height of the outer rib 17 may be lower than the height of the bulging portion 14. Further, the outer rib 17 extends upward along the side wall portion 12a.

The food packaging container 11 configured as described above wraps food at room temperature or in a frozen state, and when the food is eaten, the food is placed in the food packaging container 11 and heated in a microwave oven.

On the inner bottom surface 13 of the storage recess 12 for storing food, a bulge portion 14 having a hollow portion underneath and an intersection portion 15 are formed by raising the height of the food, and special features such as floating the food packaging container 11 are formed. The bottom of the food can be heated well without any ingenuity. Moreover, the bulging portion 14 extends in all directions from the intersecting portion 15 and spreads the heat generated by heating to the surroundings. Therefore, the occurrence of uneven heating can be satisfactorily prevented, and the efficient heating is performed in combination with the promotion of heat conduction.

Moreover, since efficient heating is performed, the heating time can be shortened, and time and energy can be saved.

Further, when the food has a plurality of storage recesses 12, the way the food is heated can be adjusted by changing the mode of the bulging portion 14 and the intersection portion 15 for each storage recess 12. Therefore, even different kinds of foods that can be accommodated in one food packaging container 11 can be heated more appropriately for each food.

Further, since the vertical cross-sectional shape of the bulging portion 14 is arcuate, the contact with the food is soft, and the chopsticks can be moved smoothly even when the food is picked up with chopsticks.

Such an effect is that the bulging portions 14 at the intersection 15 are smoothly continuous at the corner portion 14b forming an arc shape in a plan view, and the bulging portion 14 has the width of the hollow portion 16. It is further enhanced by having a flat shape that is more than twice the height.

Further, since the bulging portion 14 extends to the lower part of the side wall portion 12a of the accommodating recess 12 and the cavity portion 16 communicates with the outside, the action of heat conduction can be spread to the end portion. This can be done more reliably by forming the outer rib 17 and increasing the rigidity of the lower portion of the accommodating recess 12 to secure the shape of the bulging portion 14.

Regarding the aspect of the bulging portion 14 and the intersecting portion 15, since the plan view shape of the portion centered on the intersecting portion 15 is a cross shape, the heat conduction can be expanded as a surface even though the shape is simple. The heating efficiency is good. If a plurality of intersecting portions 15 are formed and the plan view shape formed by the bulging portions 14 is a grid shape or a grid shape, desired heating can be enabled even if the inner bottom surface 13 of the accommodating recess 12 is wide. ..

The above configuration is one form for carrying out the present invention, and the present invention is not limited to the above-mentioned configuration, and other configurations may be adopted.

For example, the bulging portion 14 may not only be linear, but may be entirely or partially curved.

Further, the intersecting portion 15 may be in a mode in which two or more bulging portions 14 intersect.

11 ... Food packaging container 12 ... Storage recess 12a ... Side wall 13 ... Inner bottom surface 14 ... Swelling 14b ... Corner 15 ... Intersection 16 ... Cavity 17 ... Outer rib

Claims (9)

A food packaging container having at least one storage recess for storing food.
On the inner bottom surface of the accommodating recess, a plurality of bulging portions that bulge upward are formed, and at the same time, a plurality of bulging portions are formed.
An intersection where the bulges intersect with each other is provided.
A food packaging container in which a cavity is formed under the bulge including the intersection. The food packaging container according to claim 1, wherein the bulging portion has an arcuate vertical cross-sectional shape. The food packaging container according to claim 1 or 2, wherein the bulging portion extends to the lower portion of the side wall portion of the accommodating recess, and the cavity portion opens and communicates with the outside. The food packaging container according to claim 3, wherein outer ribs protruding downward are provided side by side on the bulging portion at a portion corresponding to an end portion on the bottom surface of the accommodating recess. The food packaging container according to any one of claims 1 to 4, wherein the bulging portions at the intersection are continuous in a circular arc shape in a plan view. The food packaging container according to any one of claims 1 to 5, wherein the width of the bulging portion is set to be larger than the height of the cavity portion. The food packaging container according to any one of claims 1 to 5, wherein the width of the bulging portion is at least twice the height of the cavity portion. The food packaging container according to any one of claims 1 to 6, wherein the intersection is composed of the bulging portions orthogonal to each other and has a cruciform shape in a plan view. Multiple intersections are formed
The food packaging container according to claim 8, wherein the plan view shape formed by the bulging portion is a grid shape or a grid shape.

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