JPH1170930A - Packaging container and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container that is suitable for housing sushi or doughboys requiring liquid matter such as soy sauce or soup, and to provide manufacturing method therefor. SOLUTION: The present container is made up by cutting off four corners of a square platelike body, by raising side walls 13 formed between each of the four corners with a hollowed-out part for forming legs provided respectively, and by joining the side walls respectively at their end 13' by welding. A depressed part for housing is formed with its bottom being positioned at the center slightly lower than the upper end of the side wall and a concaved part or convexed part for forming a small section 12 is formed, being integral with the depressed part 11 for housing. After forming the shallow depressed part 11 for housing at the center of a square thermoplastic synthetic resin sheet and forming the recessed or projecting part for becoming the small section 12 at the inside of the depressed part for housing, the side walls 13 are formed by cutting off the four corners while the hollowed-out part for forming legs is formed by cutting-off at each of the side walls 13 and furthermore the side walls 13 between the four corners are raised and joined at their ends 13' by welding, and thereby the container is made up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a packaging container,
In particular, the present invention relates to a packaging container suitable for storing foods that require soy sauce, sauce, etc. such as sushi and mitarashi dumpling.

[0002]

2. Description of the Related Art Conventionally, a container material is formed from a synthetic resin sheet to form a concave portion for storage, and four corners are cut off so that a side wall can be formed. The most common type of packaging container in which a bottom plate is integrally formed at the lower end of a side wall is a fusion container. And, in order to prevent the contents from moving inside the bottom plate or to deform the bottom plate, the bottom plate is stepped, corrugated,
Some have projections, grooves, etc. (Japanese Patent Publication No. 6-5743).
No. 7), but there was also one in which the bottom plate of the concave portion for storage was formed deeply (Japanese Patent Publication No. 5-69701). However, since the concave portion for storage was deep, it was not suitable for making the stored item easily visible from the outside in the stored state. There was a problem, and it was not particularly designed to accommodate foods that require soy sauce or sauce, such as sushi and mitarashi dango.

Accordingly, the present invention has been made to solve the above-mentioned problems and to provide a packaging container suitable for accommodating sushi and mitarashi dumplings which require liquids such as soy sauce and sauce, and a method for producing the same. It is an object.

[0004]

According to a first aspect of the present invention, there is provided a packaging container according to the present invention in which four corners of a rectangular plate are cut off and a foot cavity is formed. A container in which the side walls between the four corners are raised and the side wall end portions are fusion-bonded to each other, and a storage recess having a center position slightly lowered from an upper end of the side wall as a bottom surface is formed. Are formed integrally with each other.

[0005] The side wall of the packaging container according to the first aspect of the present invention is obtained by cutting off four corners of a rectangular plate-like body, raising the four corners, and fusing the end portions of the side walls together.
The storage recess in this packaging container is a storage recess having a center position slightly lowered from the upper end of the side wall as a bottom surface, so that the storage recess is a shallow bottom, and the storage can be easily stored from the outside. Since the concave portion or convex portion for forming the small section is integrally formed in the storage concave portion,
The inside of the small section is used as a soy sauce storage section for sushi or as a section where the sauce of mitarashi dumpling does not enter, and can be used as a storage section where the gripping end of the dumpling skewer is located. In addition, the foot cavity formed on the side wall has an outer shape suitable for use as a packaging container for a set meal.

[0006] As described above, when the entire packaging container is integrally formed of a thermoplastic foamed resin sheet, it is possible to provide a container having good moldability and excellent heat insulation. . Further, when the container is covered with a high lid formed of a transparent synthetic resin sheet and combined as described in claim 3, the container can be seen through from the outside in a state where the contents are sufficiently protected by the high lid. It becomes an easy packaging container.

Further, as a method of manufacturing a packaging container according to the present invention, as described in claim 4, a shallow storage recess is formed in the center of a rectangular thermoplastic synthetic resin sheet, and a small storage recess is formed in the storage recess. After forming a concave portion or a convex portion to become a partition, a side wall is formed by cutting off four corners, a foot hollow portion is formed by cutting off the side wall, and a side wall is further raised by raising the side wall between the four corners. It is characterized in that the container is formed by fusing the ends together.

According to the method for manufacturing a packaging container according to the present invention, a shallow recess for storage and a recess or projection for forming a small section in the recess are formed at the center of the thermoplastic resin sheet. In addition, it is possible to easily form the storage recesses and small sections adapted to the contents, and to cut off the four corners after cutting and cut off the foot cavity, so that efficient cutting can be performed, and then the side walls between the four corners are cut. Since the container is formed by fusing and joining the end portions of the side walls together, a unique packaging container can be manufactured in a series of steps in which the side wall with a foothole substitutes for the leg of the set become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be sequentially described with reference to the drawings. FIG. 1 shows a process of manufacturing a packaging container 10 from a rectangular plate-like body made of a synthetic resin sheet 1 made of, for example, a thermoplastic foamed resin sheet. First, the sheet 1 shown in FIG. A shallow storage recess 11 is formed in the center, a recess for forming the small section 12 in the storage recess 11, and a groove 15 for fitting to the lid is formed at a position outside the side wall.
Next, the side wall 1 is cut off at four corners a
3 are formed, and a cut-out portion 14 is formed by cutting off the side wall 13 as shown in FIG. 1-III. Then, the side walls 13, 13,...
The container 10 can be formed by fusing the 3 'and 13' together as shown in FIG. 1-IV.

When the container 10 is combined with a high lid 20 made of a transparent synthetic resin sheet as shown in FIG. 2, the contents can be sufficiently protected by the high lid 20, and the shallow storage recess 11 can be provided. In particular, when the container 10 is formed with the above-mentioned fitting groove 15 for fitting with the lid, the lid 20 having the protruding ridge 25 ′ formed at the end thereof can be made suitable for seeing through the contents stored in the container from the outside. Can be easily fitted and locked.

In the above-described embodiment, the small sections 12 are formed by the concave portions. However, as shown in FIG. 3, the small sections 12 can be formed by forming the small sections 12 having the ridge-shaped convex portions. The packaging container 10 shown in FIGS. 1 to 3 is particularly suitable for storing sushi S and the like, and is suitable for storing soy sauce in the storage section of the small compartment 12. Next, FIGS. 4I to IV show a manufacturing process of a container in which a storage concave portion 11 and a small section 12 formed by a convex portion, which are particularly suitable for storing the mitarashi dumpling A, are formed. Is formed in a shape suitable for placing the skewer B of the mitarashi dumpling A one by one on the convex portion forming the
Of the small section 12 is separated from the dumpling portion so that the sauce does not enter the small section 12.

FIG. 5 shows a state where the high lid 20 is covered. The high lid 20 in each of the above embodiments may be fitted in the shallow storage recess 11 in an inner fitting manner or may be fitted in an outer fitting manner. Further, as the thermoplastic foamed resin sheet forming the container 10, a polystyrene foamed sheet or other known foamed sheets can be used, and as the transparent high lid 20, a high impact polystyrene or other known transparent resin sheet can be used.

[0013]

As described above, according to the packaging container of the present invention, it is easy to use soy sauce and sauce for food such as sushi and mitarashi dumpling in small compartments formed in shallow recesses. In addition, the shallow storage recess can store food items such as sushi and mitarashi dumplings in a very easy-to-view storage condition from the outside. The side wall where the side of the plate is raised downward is fused and joined to form a leg-shaped part with a hollow hole, and a container can be used as a substitute for a set, which is extremely valuable in use. It is expensive.

Further, according to the above-described method for manufacturing a packaging container according to the present invention, a shallow recess and a concave or convex portion for forming a small section in the recess can be simultaneously formed, thereby forming a side wall. Can be cut off at the same time to cut the four corners and cut out the side wall to form a hollow, so that a unique high value container can be provided by fusing the finally raised side wall ends together. In addition, efficient manufacturing can be realized in a series of manufacturing processes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a manufacturing process.

FIG. 2 is a perspective view in which a high lid is combined.

FIG. 3 is a perspective view showing a modified example of a small section.

FIG. 4 is a perspective view showing a manufacturing process of a modified example.

FIG. 5 is a perspective view in which a high lid is combined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet 10 Packaging container 11 Shallow storage recess 12 Small section 13 Side wall 13 'Side wall end 20 High lid

Claims (4)

[Claims] 1. A container in which four corners of a rectangular plate-like body are cut off, and side walls between the four corners in which a hole is formed are raised, and the side wall ends are fusion-bonded to each other. A packaging container, characterized in that a storage recess having a bottom surface at the center position is formed, and a recess or a projection forming a small section is integrally formed in the storage recess. 2. The packaging container according to claim 1, wherein the whole is integrally formed of a thermoplastic foamed resin sheet. 3. The packaging container according to claim 1, wherein the container is combined so as to cover a high lid formed of a transparent synthetic resin sheet. 4. A shallow storage concave portion and a concave portion or a convex portion for forming a small section in the storage concave portion are formed in the center of the rectangular thermoplastic synthetic resin sheet, and the four corners are cut off. Forming a side wall and forming a hollow by cutting off the side wall, further raising the side wall between the four corners, and fusing and joining end portions of the side wall to form a container. Container manufacturing method.