JPH09255049A - Double packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make vapor stay efficiently at the bottom of a container after passing through grooves by a method wherein a peripheral groove is formed of a turned-up piece and an internal wall surface at a step when an internal container is fitted into an external container main body, and vertical grooves formed at indented parts and narrow vertical grooves communicating with the vertical grooves are provided. SOLUTION: A peripheral groove is formed at the inner periphery of a container main body, and waterdrops from spot surfaces are received therewith. Vertical grooves 17 are formed out of indented parts 17 formed at the bottom of the peripheral groove, namely a step 14, and as the vertical grooves 17 are made to communicate with narrow vertical grooves 18 formed at a rising periphery 12 connecting to the vertical grooves 17, an appropriate gap, namely a distance between the inside and the outside, can be maintained between an external container main body 1 and an internal container 2. As the vertical grooves 17 communicating with the peripheral groove are formed, waterdrops or heating vapor are naturally stayed at a bottom 11 after passing through the vertical grooves 17 and a plurality of narrow vertical grooves 18. Therefore, the container can be prevented from being swelled abnormally or broken by vapor pressure at the inside of the container 1, and induction heating can be made safely until food in the container is heated appropriately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double packaging container excellent in heat retention without dew condensation due to steam generated when a packaged food is heated on the contents.

[0002]

2. Description of the Related Art In recent years, packaged foods packed with bento, rice, prepared foods, etc. have been widely sold at supermarkets and convenience stores, and are widely used in general. Foods such as bento, rice, and prepared foods are hermetically packed in a packaging container with a lid, and the container is heated in a microwave oven so that it can be warmed and easily eaten.

[0003]

As described above, foods packed with conventional foods such as bento, rice (rice), and prepared foods generate water droplets due to the temperature difference, and when these foods are eaten, , When heated in a microwave oven, water vapor is generated, and with the passage of time, dew forms and drops on the contents.

Therefore, in order to escape steam, the fitting of the lid to the container is loosened to improve ventilation. However, in this case, the lid may come off during handling or carrying to cause liquid leakage. Therefore, the entire outer circumference of the container is covered with the film. Further, if the lid is tightly fitted, there is a problem that the lid will come off due to steam in the container during heating. In any case, the problem of condensation is inevitable.

The present invention has been made in order to solve these problems, and it is possible to separate water droplets generated by a temperature difference and water droplets generated by steam generated at the time of heating from the lid and to retain them, without any trouble. It is an object of the present invention to provide a double packaging container excellent in heat retention that can be warmed for a short time.

[0006]

A double wrapping container according to the present invention comprises an outer container body and an inner container integrally fitted with the outer container body, and the outer body raises the peripheral edge of the bottom of the container body. To form a rising edge portion, the upper part of the rising portion is bent outward to form a stepped portion, and the peripheral edge of this stepped portion is formed over the entire circumference, and the peripheral edge of this stepped portion is formed. Rise up to form an inner wall surface, bend this inner wall surface to the outside to form a peripheral edge, and form a plurality of vertical streak recesses at appropriate points on the stepped portion, while also forming a plurality of thin vertical stripes on the rising edge. The inner container is formed in a shape that fits inside the rising edge of the outer container body, and the outer peripheral edge is folded outward to form a folded piece, and the tip of the folded piece is formed. Is formed so as to be joined to the inner end of the step, and the inner container is fitted to the outer container body. Characterized in that the formation of the thin vertical groove communicating with the longitudinal grooves and said longitudinal grooves by recesses of the stepped portion to form a peripheral groove in the folded piece and the inner wall surface in the stepped portion when.

In the packaging container of the present invention, since the peripheral groove formed by a double container capable of absorbing water droplets and steam, the vertical groove by the concave portion, and the narrow groove are provided, the microwave oven for cooking as it is. Even when placed in a container or the like and heated, water droplets due to a temperature difference, steam generated in the heating process, and steam are efficiently retained at the bottom of the container through these grooves.

Further, since the groove for retaining the water droplets is formed inside the container, the portion where the water droplets are retained is hidden, so that the sprayability is good. Furthermore, since the inner container is fitted to the outer container body and the water droplet retention portion is formed on the bottom, the heated steam naturally retains in the lower portion of the container body through the groove.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing an embodiment of the double packaging container of the invention, FIG. 2 is a plan view of an outer main body in FIG. 1,
3 is a sectional view taken along the line AA in FIG. 2, FIG. 4 is a sectional view taken along the line BB in FIG. 2, and FIG. 5 is a sectional view showing a mounted state of the double packaging container of the present invention.

The double packaging container of the present invention comprises an outer container body 1
And an inner container 2 that is integrally fitted to the outer container body 1 inside the outer container body 1, and a lid 3 that is fitted to the outer container body 1.

As shown in the figure, the outer container body 1 is made of heat-resistant plastic and is a basin-shaped body that forms a space for storing food. A rising edge portion 12 is formed, an upper portion of the rising edge portion 12 is bent outward to form a step portion 13, and a peripheral edge of the step portion 13 is raised and a step portion 14 is formed over the entire circumference. . Further, the upper end of the step portion 14 is bent upward to form an inner wall surface 15, and further is horizontally bent to form an upper edge portion 16. A plurality of vertical recesses 17 are formed at appropriate places on the step portion 14. Further, a thin streak 18 is formed on the rising edge 12 over the entire circumference. Reference numeral 19 is a protruding portion formed on the bottom portion 11.

Further, the inner container 2 rises up the peripheral edge of the bottom portion 21 to form a rising edge portion 22. This rising edge portion 22
Fits inside the rising edge 12 of the outer container body 1.
The rising edge portion 22 is folded back to the outside to form a step portion 23, the step portion 23 is bent upward to form an outer peripheral edge 24, and the tip is folded back to form a folded piece 25. The tip 25a of the folded piece 25 is joined to the inner end 14a of the step portion 14 of the outer container body 1.

When the inner container is fitted into the outer container body 1, the folding groove 25 is formed in the step portion 14 to form the peripheral groove 30 inside the container body. The peripheral groove 30 integrally communicates with the vertical groove 17 formed by the concave portion 17 formed in the step portion 14 and the thin vertical groove 18 formed in the rising edge portion 12 which communicates with the vertical groove 17.

The outer container body 1 has a disc shape,
Regardless of a box shape or the like, any shape may be used as long as the step portion 14 is formed on the rising edge portion 12. In addition, food items such as bento, rice and prepared foods are accommodated in the inner container 2 of the bowl-shaped container body 1 as described above.

As shown in the figure, the lid 3 of the present invention has a ceiling surface 31 and a step 32, and an engaging portion 33 fitted around the inside of the upper portion of the inner wall surface 15 is circumferentially provided. A steam vent hole 34 is provided at an arbitrary position on the top surface 31. Steam vent hole 34
The perforations are not limited to particular positions on the top surface 31.
A display label 35 may be attached to the vapor vent hole 34 to prevent dust from entering. Top surface 3 of this display label 35
The label 1 may be attached to both ends or one side of the display label 35, and the label may have a release paper function or may be heat-fused.

The lid 3 of this embodiment can be fitted to the outer container body 1 by any of an inner fitting lid, an inner fitting lid and an outer fitting lid. It can also be used on body 3.

As described above, according to the present invention, the inner container 2 and the lid 3 are fitted to the inside of the basin-shaped outer container body 1.

In the double-packed container of the embodiment thus constructed, the peripheral groove 30 is formed on the inner peripheral edge of the container body to receive the water droplets on the point surface. The vertical groove 17 is formed by the bottom of the peripheral groove 30, that is, the concave portion 17 formed in the step portion 14,
Since it communicates with the narrow vertical groove 18 formed in the rising edge portion 12 that communicates with the vertical groove 17, the outer container body 1 and the inner container 2
Since a peripheral groove 30 maintains an appropriate gap, that is, an inner / outer space, and a groove 17 communicating with the peripheral groove 30 is formed, the groove 17 is transmitted to the plurality of thin vertical grooves 18. Water droplets and heated steam that have been transmitted naturally stay in the bottom portion 11. Therefore, the vapor pressure inside the container 1 does not cause abnormal expansion or breakage, and the food is heated to an appropriate temperature,
Induction heating can be performed with confidence.

Further, since the outer container main body is formed with a plurality of narrow vertical grooves 18 around the outer container main body, it has a heat insulating effect, and the heated container can be carried by hand.

Further, the bottom portion 2 of the outer dish body 1 having a deep dish shape
Since the protruding portion 4 is formed on the surface of the food product, the central portion of the food is formed thinner than the peripheral portion and the space is formed in the central portion of the bottom surface, so that the food is heated uniformly and the heating time is shorter. Done.

[0021]

The packaging container of the present invention is provided with a peripheral groove capable of absorbing water droplets and vapor, a vertical groove formed by a concave portion, and a narrow line groove formed in a double container, so that it can be used as it is for cooking. Even when placed in a microwave oven or the like and heated, water droplets due to a temperature difference or steam or steam generated in the heating process efficiently stays at the bottom of the container through these grooves.

Further, since the groove for retaining the water droplets is formed inside the container, the retaining portion of the water droplets is hidden, so that the sprayability is good. Furthermore, since the inner container is fitted to the outer container body and the water droplet retention portion is formed on the bottom, the heated steam naturally retains in the lower portion of the container body through the groove.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a double packaging container of the present invention.

FIG. 2 is a plan view of an outer container body in FIG.

3 is a sectional view taken along line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a cross-sectional view showing a mounted state of the double packaging container of the present invention.

[Explanation of symbols]

 1 ………… Outside container body 3 ………… Inner container 6 ………… Lid body 7 ………… Upper edge 12 ……… Top surface 13 ……… Step portion 14 ……… Engagement portion 15 ……… Incision Groove 16 ………… Steam vent hole 17 ………… Display label

Claims (1)

[Claims] 1. An outer container main body and an inner container integrally fitted with the outer container main body, wherein the outer main body raises a peripheral edge of a bottom portion of the container main body to form a rising edge portion, and an upper portion of the rising portion is formed. Bending outward to form a step, raising the periphery of the step and forming a step over the entire circumference, raising the edge of the step to form an inner wall surface, To form a peripheral edge portion, and form a plurality of vertical streak recesses at appropriate portions of the step,
A plurality of thin vertical streaks are formed on the rising edge portion, and the inner container is formed into a shape that fits inside the rising edge portion of the outer container body, and its outer peripheral edge is folded back to the outside. A folded piece is formed so that the tip of the folded piece is joined to the inner end of the step portion, and when the inner container is fitted to the outer container body, the folded piece and the inner portion are formed in the step portion. A double packaging container characterized in that a peripheral groove is formed on a wall surface, and a vertical groove formed by the concave portion of the step portion and a thin vertical groove communicating with the vertical groove are formed.