JP2000281042A - Container for food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a side wall from falling outward owing to moisture, etc., and to prevent a container main body from becoming out of shape. SOLUTION: A container main body 11 formed in a circular cup shape comprises a circular bottom wall 12 and a side wall extending diagonally upward from the peripheral edge of the bottom wall 12. The side wall 13 is formed with many pleats 14 extending in a height direction. The pleats 14 are formed in a flat waveform, and the upper part they are, the wider the pleats are. On the peripheral edge of the bottom wall 12, V shaped ribs 15 having a V shape cross section and extending along the peripheral edge are formed throughout the peripheral edge. The container main body 11 is made of one thin sheet shape paper, and by press processing it is formed in a cup shape with the pleats 14 and the V shape ribs 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper food container for storing foods such as pound cake and gratin.

[0002]

2. Description of the Related Art Conventionally, in this type of food container,
As shown in FIG. 5, the container body 21 is formed into a cup shape by folding thin paper and having a bottom wall 22 and a side wall 23 extending obliquely upward from the periphery of the bottom wall 22.

On the other hand, as a food container made of metal, for example, a container having a configuration as disclosed in Japanese Patent Application Laid-Open No. Hei 8-24973 is known. In this conventional configuration, the container body is formed in a cup shape from aluminum foil, and two ribs extending along the peripheral edge of the bottom wall are formed at the peripheral edge of the bottom wall.

Further, as a food container made of a synthetic resin, one having a configuration as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 56-68672 is known. In this conventional configuration,
The container main body is formed in a cup shape from a synthetic resin, and a curved portion that curves inwardly of the container is formed on the peripheral edge of the bottom wall along the peripheral edge of the bottom wall.

[0005]

However, in the above-described conventional configuration of the paper container, the shape of the container body 21 is held in a cup shape by a fold formed by bending thin paper. For this reason, when the thin paper is weakened by absorbing the moisture in the food or the moisture in the outside air, the side wall 23 falls outward due to the weight of the food to be stored as shown by the two-dot chain line in FIG. However, there was a problem that the shape was lost.

On the other hand, in the conventional configuration made of metal or synthetic resin, there is no possibility that the container body will be deformed due to moisture absorption. Therefore, the above-mentioned ribs and curved portions do not take into account deformation due to moisture absorption.

The present invention has been made by focusing on the problems existing in the prior art as described above. It is an object of the present invention to provide a food container that can prevent the side wall from falling outward due to moisture absorption or the like and preventing the container main body from being out of shape.

[0008]

In order to achieve the above object, a food container according to the first aspect of the present invention has a bottom wall and a side wall extending from the bottom wall by folding a paper sheet material. The container main body is formed in the shape of a cup comprising: and a groove-like rib provided on the peripheral edge of the bottom wall or inside thereof.

A food container according to a second aspect of the present invention is the food container according to the first aspect, wherein a plurality of the groove-shaped ribs are provided. The food container of the invention according to claim 3 is
In the invention described in claim 1 or claim 2, the groove-shaped rib is located within 1/3 of the peripheral edge between the center of the bottom wall and the peripheral edge.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
And FIG. As shown in FIG. 1, the container body 11 is formed in a circular cup shape having a circular bottom wall 12 and a side wall 13 extending obliquely upward from the periphery of the bottom wall 12. The height of the side wall 13 is set to an arbitrary ratio with respect to the diameter of the bottom wall 12, but in this embodiment, the height is formed to be about 30% of the diameter of the bottom wall 12.

On the side wall 13, a large number of pleats 14 extending in the height direction are formed. The fold 14 has a plane wave shape, and is formed such that the bent portion becomes wider as it goes upward. Further, on the periphery of the bottom wall 12, a V-shaped rib 15 as a groove-shaped rib having a V-shaped cross section extending along the periphery.
Are formed over the entire periphery.

The container body 11 is formed from a single sheet of thin paper, is formed into a cup shape by press working, and has folds 14 and V-shaped ribs 15 formed thereon.
Next, the operation of the food container configured as described above will be described.

When the food container is used as a confectionery container, for example, a predetermined amount of confectionery dough is poured into the container main body 11, and the confectionery dough is heated and baked in a microwave oven or the like. When used as a container for gratin,
Inject a predetermined amount of cooked gratin into the container body 11,
Store frozen. Then, when eating, thaw in a microwave oven or the like and heat further.

At this time, when the thin paper constituting the container body 11 absorbs moisture in the food or moisture in the outside air and becomes weak, the expansion of the food due to heating or the weight of the food itself causes the side wall 13 to fall outward. Works. However, the expansion of the food and the weight of the food itself are caused by the V-shaped rib 1 having a V-shaped cross section.
5 also works in the direction in which the bottom wall 12 is expanded in diameter. As a result, as shown by a two-dot chain line in FIG. 2, the side wall 13 is moved substantially parallel to the lateral direction.

As described above, according to this embodiment, the following effects are exhibited. A V-shaped rib 15 is provided on the periphery of the bottom wall 12 of the container body 11. Therefore, when the moisture in the food or the moisture in the outside air is absorbed to weaken the thin paper, the expansion of the food due to heating and the weight of the food itself,
It works in the direction of tilting the side wall 13 outward, and the V-shaped rib 1
5 also works in the direction of flattening. Therefore, it is possible to prevent the side wall 13 from moving substantially parallel to the lateral direction and to fall outward unlike the conventional case. Therefore, the shape of the container body 11 can be prevented from being out of shape, and the appearance can be favorably maintained.

Since the V-shaped rib 15 is provided not on the inside of the bottom wall 12 but on the periphery thereof, when the V-shaped rib 15 is deformed in the direction of flattening, the deformation is directly expanded of the bottom wall 12. It contributes to the diameter. For this reason, when the force in the direction of flattening the V-shaped rib 15 acts, the amount by which the bottom wall 12 expands is larger than when the V-shaped rib 15 is formed inside the periphery of the bottom wall 12. large. Therefore, the container body 1
The function of the V-shaped rib 15 for preventing the shape collapse of the shape 1 can be effectively exerted.

The V-shaped rib 15 is formed in a V-shaped cross section,
When the sheet-like thin paper is formed into a cup shape by press working, it is formed simultaneously with the folds 14. Therefore,
It can be easily manufactured from a piece of flat thin paper.

The V-shaped rib 15 is formed in a V-shaped cross section,
It is formed so as to project below the bottom wall 12. For this reason, the tip of the V-shaped rib 15 receives a concentrated load due to the weight of the food, the V-shaped rib 15 is flattened, and the diameter of the bottom wall 12 is easily increased. Therefore, it is possible to reliably prevent the side wall 13 from falling outward and the container body 11 from being out of shape.

Since the expansion of the food due to the heating and the weight of the food itself act in the direction of flattening the V-shaped rib 15, it is possible to prevent the contents from entering the V-shaped rib 15.
The above-described embodiment may be modified as follows.

V-shaped rib 15 of the embodiment as a groove-shaped rib
Arbitrarily changing the cross-sectional shape of For example, an inverted trapezoidal rib 1 having an inverted trapezoidal cross section as shown in FIG.
6. A semicircular rib 17 having a semicircular cross section as shown in FIG. 3 (b), and other groove-shaped ribs having a U-shaped cross section are formed. In the case of such a configuration, in particular, the inverted trapezoidal rib 1
In the case of 6, since the contact area can be increased,
The strength of the ribs can be improved, and the container body 11 can be stably placed.

The groove-shaped rib is formed so as to protrude inward from the bottom wall 12, and the cross-sectional shape thereof is arbitrarily formed. For example, as shown in FIG. 3 (c), an inverted V-shaped rib 18 having an inverted V-shaped cross section is formed on the periphery of the bottom wall 12, and a groove-shaped rib is formed in an inverted U-shaped cross section. In such a configuration, the entire lower surface of the bottom wall 12 is grounded, so that the container body 11 can be stably placed.

The V-shaped rib 15 is provided not on the periphery of the bottom wall 12 but on the inside of the periphery. Preferably, it is provided so as to be located within 1/3 of the peripheral side between the center and the periphery of the bottom wall 12, and more preferably within 1/4.

In such a configuration, when the V-shaped rib 15 is deformed in a direction in which it becomes flat, the deformation is applied to the bottom wall 12.
Contributes indirectly to the diameter expansion of the bottom wall 12 via the outer peripheral portion of.
For this reason, the bottom wall 12 is slightly inferior to the embodiment, but to some extent.
Of the container body 11 can be prevented from becoming out of shape. The width of the outer peripheral portion of the bottom wall 12 interposed between the V-shaped rib 15 and the peripheral edge of the bottom wall 12 decreases as the V-shaped rib 15 is provided closer to the peripheral edge of the bottom wall 12. The function of the V-shaped rib 15 for preventing falling down can be effectively exerted.

In addition to the peripheral ribs of the bottom wall 12 or the groove-like ribs provided inside the peripheral edge, one or more groove-like ribs are provided at a position continuous with the groove-like ribs or at a position apart from the groove-like ribs by a predetermined distance. Provide ribs.

For example, as shown in FIG. 3D, two V-shaped ribs 15 are provided continuously, or as shown in FIG. 3E, three V-shaped ribs 15 are provided continuously. Alternatively, as shown in FIG. 3F, two inverted V-shaped ribs 18 are provided continuously at a fixed distance from the peripheral edge. Alternatively, as shown in FIG. 3 (g), a V-shaped rib 15 is provided on the periphery of the bottom wall 12, and a small inverted V-shaped rib 18 is continuously provided inside the V-shaped rib 15 in a floating state. Alternatively, as shown in FIG. 3 (h), a V-shaped rib 15 is provided on the
Inverted trapezoidal ribs 16 are provided inside the U-shaped ribs 15 at predetermined intervals.

With such a configuration, the amount of diameter expansion of the bottom wall 12 when a force in the direction of flattening the groove-like ribs is applied is larger than that in the case of a single groove-like rib. Therefore, it is possible to reliably prevent the side wall 13 from falling outward and the container body 11 from being out of shape.

As shown in FIG. 4, the folds 14 of the side wall 13
Is omitted. With this configuration, the configuration can be simplified and the production can be facilitated.・ Container body 11
The shape of the triangle cup, square cup, octagon cup,
Change to an arbitrary cup shape such as a substantially elliptical cup shape. In the case of such a configuration, the food can be molded according to the shape of the container body 11.

One or more air holes are formed in the bottom wall 12, and the air holes are formed in any shape such as a circle, an ellipse, a polygon, and a saw. Then, the container main body 11 is placed on the heating plate, and thereafter, food such as confectionery dough is poured into the container main body 11, and the heating plate is heated to change the food in the container main body 11 to be heated. . In such a configuration, the food in the container body 11 is directly heated by the heating plate through the ventilation hole, so that the food can be efficiently heated.

The container body 11 is made of kraft paper, kraft stretched paper having microcrepes (very fine wrinkles),
To be formed of roll paper, Indian paper, paraffin paper, tarpaulin paper, Japanese paper, etc., having gloss on one side. In the case of such a configuration, an appropriate material can be selected according to the contents to be put in the container body 11.

Next, the technical ideas that can be grasped from the above embodiment will be described below. The food container according to any one of claims 1 to 3, wherein the groove-shaped rib is formed so as to extend along a peripheral edge of the bottom wall. With this configuration, when a force in the direction of flattening the groove-like ribs acts, the diameter of the bottom wall can be evenly increased in the circumferential direction. Therefore, the side wall can be prevented from falling outward at the periphery of the bottom wall evenly.

The food container according to any one of claims 1 to 3, wherein the groove-like rib is formed so as to extend around the entire periphery of the bottom wall. With this configuration,
When a force acts in the direction of flattening the groove-shaped rib, the bottom wall can expand its diameter all around its peripheral edge. Therefore, it is possible to prevent the side wall from falling down on the entire periphery of the bottom wall.

The food container according to any one of claims 1 to 3, wherein the groove-shaped rib has a V-shaped cross section, and is formed so as to extend over the entire periphery along the periphery of the bottom wall. In such a configuration, the load of the contents in the container body can be concentrated on the tip of the rib, and the side wall can be reliably prevented from falling outward and uniformly around the entire periphery of the bottom wall.

[0033]

Since the present invention is configured as described above, it has the following effects. According to the food container of the first aspect of the present invention, it is possible to prevent the side wall from falling outward due to moisture absorption or the like, and preventing the container body from being out of shape.

According to the food container of the second aspect, in addition to the effect of the first aspect, it is possible to reliably prevent the side wall from falling outward. According to the food container of the third aspect of the present invention, in addition to the effects of the first or second aspect of the invention, the function of the groove-like rib for preventing the side wall from falling to the outside is effectively exhibited. be able to.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of a food container of the present invention.

FIG. 2 is a cross-sectional view of the food container.

3A to 3C are partial cross-sectional views illustrating another example of groove-shaped ribs having different cross-sectional shapes, and FIGS. 3D to 3H are partial cross-sectional views illustrating another example in which a plurality of groove-shaped ribs are provided. .

FIG. 4 is a partially cutaway perspective view showing another example in which the fold of the side wall is omitted.

FIG. 5 is a sectional view showing a conventional food container.

[Explanation of symbols]

11: container body, 12: bottom wall, 13: side wall, 15: V-shaped rib as groove-shaped rib.

Claims (3)

[Claims] 1. A container body is formed in a cup shape comprising a bottom wall and a side wall extending from the bottom wall by bending a sheet material made of paper, and a groove-like rib is provided on a peripheral edge of the bottom wall or inside thereof. Food containers. 2. The food container according to claim 1, wherein a plurality of the groove-shaped ribs are provided. 3. The groove-shaped rib is located within one-third of the peripheral edge between the center of the bottom wall and the peripheral edge.
Food container according to 1.