JP4169431B2 - Heat insulating container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insulating container for use in instant foods such as instant noodles and instant soups, or frozen foods that are thawed and cooked in a microwave oven.
[0002]
[Prior art]
Conventionally, many of the heat insulating containers for storing food such as instant noodles are made of paper, and those having a double structure in which a cylindrical heat insulating member is mounted on the outer surface of a cup-shaped container body are often used. ing. The container main body is generally formed with a curled portion continuously on the side wall by curling the upper end portion outward.
[0003]
For example, Japanese Patent Application Laid-Open No. 4-201840 and Japanese Patent Application Laid-Open No. 7-223683 are prior inventions related to the above-described heat insulating container, and the upper end portion of the heat insulating member is positioned in the vicinity of the curled portion of the container main body, or A heat insulating container positioned so as to be in contact is disclosed, and Japanese Utility Model Publication No. 6-48474 discloses a heat insulating container in which an upper end portion of a heat insulating member is inserted between a curled portion and a side wall of a container main body. .
[0004]
[Problems to be solved by the invention]
In the conventional heat insulating container, when the heat insulating member is externally fitted to the container main body from below when the heat insulating member is mounted on the container main body, the heat insulating member is made of paper, so the heat insulating member is made of the container main body. There is a problem in that it bends outward along the curled portion, collapses in contact with the lower surface of the curled portion, or causes a shift in the central axis between the heat insulating member and the container main body.
[0005]
The present invention has been made in view of these disadvantages, and it is easy and strong to attach a heat insulating member to a container body. As a result, it is possible to provide a heat insulating container excellent in heat insulating properties, strength, and manufacturability. It is the purpose.
[0006]
[Means for Solving the Problems]
The invention made to solve the above-mentioned problems is equipped with a) a cup-shaped container body and a heat insulating member mounted so as to cover the outer side wall of the container body,
b) The container body has a curl portion formed by curling an upper end portion (opening peripheral edge portion) outwardly from the side wall,
c) The heat insulating member has an upper end (upper peripheral edge) bent radially inward,
d) A heat insulating container in which an upper end portion of the heat insulating member is inserted into a gap between a side wall of the container main body and a curled portion.
[0007]
According to the heat insulating container of the present invention, since the upper end portion of the heat insulating member is bent inward in the radial direction, when the heat insulating member is mounted so as to be fitted from below the container main body, the front end portion of the heat insulating member is Since it is inserted along the outer wall of the side wall of the container body and pressed against the inside of the curl portion, the guide function when the heat insulating member is inserted into the container body and after the insertion The centering function of the heat insulating member with respect to the container body can be achieved. In addition, since the upper end of the heat insulating member is bent inward in the radial direction, the heat insulating member is prevented from bending outward along the curl portion of the container body or being crushed while in contact with the lower surface of the curl portion. it can. Further, the bent tip portion (hereinafter referred to as a bent portion) of the heat insulating member is inserted so as to come into contact with the outer surface of the side wall of the container body and the inner surface of the curled portion, so that the bent portion and the curled portion press against each other. Thus, the insertion strength can be increased. In addition, since the force acts in the direction of expanding the diameter of the curled portion of the container body by the elastic force of the bent portion, the strength of the opening of the heat insulating container can be increased. Furthermore, by making the inner diameter of the upper end of the heat insulating member (meaning the inner diameter before mounting) slightly smaller than the outer diameter of the upper end of the side wall, the bent portion can be smoothly inserted into the curled portion. Thus, the centering of the heat insulating member with respect to the container body can be more reliably performed, and the strength of the opening of the container can be further increased.
[0008]
The container body may be made of synthetic resin, and the heat insulating member may be made of paper. According to this means, it becomes easy to insert the upper end portion of the heat insulating member between the curled portion and the side wall by the elasticity of the synthetic resin and the rigidity of the paper, and the productivity can be improved. In addition, the preservability of food contained in the container can be maintained with a low-cost, synthetic resin container body with excellent barrier properties, and the rigidity of the container itself can be maintained by adjusting the thickness of the paper insulation member The weight and cost of the entire container can be reduced. Furthermore, after the container is used, the container body and the heat insulating member can be separated and disposed of, which is preferable in terms of resource recycling.
[0009]
It is good to have a space | gap between the side wall outer surface of the said container main body, and the inner surface of a heat insulation member. According to this means, the said space | gap becomes a heat insulation layer and can improve the heat insulation of the said heat insulation container.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a partially cutaway front view showing a heat insulating container according to an embodiment of the present invention, and FIGS. 2A and 2B illustrate insertion of a heat insulating member into a container main body of the heat insulating container of FIG. FIG. 3 is a partially cutaway front view showing a heat insulating container according to a different form from the heat insulating container of FIG.
[0011]
The heat insulating container 1 in FIG. 1 includes a container main body 2 and a heat insulating member 3. The container body 2 is a cup-shaped container having a cylindrical side wall 4 and a bottom wall 5 and having an upper opening. The side wall 4 is formed in a tapered shape whose diameter increases toward the top. Further, a curled portion 6 is provided continuously to the upper end of the side wall 4 and curled at the upper end portion outward.
[0012]
Examples of the material of the container main body 1 include paper, synthetic resin, or a laminate thereof, and are not particularly limited and are appropriately determined depending on the type of food to be stored in consideration of the cooking method and storage stability. However, in consideration of cost, a synthetic resin that can maintain a minimum barrier property for food preservation is preferable.
[0013]
Similarly to the side wall 4 of the container body 2, the heat insulating member 3 is a cylindrical body formed in a tapered shape whose diameter increases toward the upper side, and is formed along the outer surface of the side wall 4 of the container body 2. A bent portion 7 that is bent at a predetermined angle inward in the radial direction is formed at the upper end portion of the heat insulating member 3. The diameter of the tip of the bent portion 7 is formed to be slightly smaller than the diameter of the upper end of the side wall 4. In addition, a curled portion 8 formed by curling inward is formed at the lower end portion of the heat insulating member 3, and this curled portion 8 is formed so as to support the lower surface of the bottom wall 5 of the container main body 2 when mounted on the container main body 2. Has been.
[0014]
As the material of the heat insulating member 3, paper, synthetic resin, or a laminate thereof can be used. However, in consideration of heat insulation and cost, a material using paper as a base material is preferable, and polyethylene is usually used on one or both sides of the paper. A laminate of a plastic film such as polypropylene is used.
[0015]
Next, attachment of the heat insulating member 3 to the container body 2 will be described. The heat insulating member 3 is attached to the container body 2 by fitting the heat insulating member 3 from below the container body 2, but the diameter of the tip of the bent portion 7 is slightly smaller than the diameter of the upper end of the side wall 4 as described above. Therefore, the tip of the bent portion 7 is in contact with the side wall 4 at a location where their diameters are the same (see FIG. 2A), and when the heat insulating member 3 is pushed in using the elasticity of the bent portion 7, The bent portion 7 comes into contact with the inner surface of the curled portion 6, and then the bent portion 7 is securely inserted in a state of being pressed by the gap between the side wall 4 of the container body 2 and the curled portion 6 (FIG. 2B). reference). Therefore, the heat insulating container 1 can be increased in strength by the rigidity and elasticity of the bent portion 7 inserted between the side wall 4 and the curled portion 6. Further, since the heat insulating member 3 has the bent portion 7 at the tip portion thereof, the heat insulating member 3 does not contact the curled portion 6 to be bent or crushed.
[0016]
The heat insulating container 2 in FIG. 3 is substantially the same in shape and material as that of the heat insulating container 1 in FIG. The heat insulating container 2 is different from the heat insulating container 1 in that a small-diameter tapered circumferential step portion 9 is formed below the side wall 4. Therefore, when the heat insulating member 3 is attached to the container main body 2, a gap 10 is formed between the two, and the heat insulating property of the heat insulating container 2 can be improved.
[0017]
The heat insulating container of the present invention is not limited to the above-described embodiment. For example, as a method for fixing the container main body 2 and the heat insulating member 3, an adhesive may be applied to at least one contact surface. is there. As such an adhesive, for example, a hot melt resin in which an ethylene vinyl acetate copolymer, polyamide, polyester, attack polypropylene, or the like is used as a main material and a rosin resin, a petroleum resin, or the like is blended is employed.
[0018]
【The invention's effect】
As described above, according to the heat insulating container of the present invention, the heat insulating property, the appearance, the pressure resistance are excellent, and the manufacturing can be facilitated.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing a heat insulating container according to an embodiment of the present invention.
2A and 2B are process diagrams for explaining insertion of a heat insulating member into a container body of the heat insulating container of FIG.
FIG. 3 is a partially cutaway front view showing a heat insulating container according to a different form from the heat insulating container of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thermal insulation container 2 Container main body 3 Thermal insulation member 4 Side wall 5 Bottom wall 6 Curl part 7 Bending part 8 Curl part 9 Circumferential step part 10 Cavity 11 Thermal insulation container

Claims (4)

A cup-shaped container body having a tapered side wall ;
Equipped with a heat insulating member, which is mounted so as to coat the outer surface of the side wall of the container body, at least in the same shape as the upper part of the container body, and the upper side wall of the container body is tapered .
The container body has a curled part formed by curling the upper end part continuously to the side wall,
The upper end of the heat insulating member is bent radially inwardly, when externally fitted to said insulating member from below of the container body, Ru is inserted into the gap between the side wall and the curl portion of the container body Thus, the heat insulating container whose outer circumferential surface in the radial direction is in contact with and pressed against the inner circumferential surface in the radial direction of the curled portion . The heat insulating container according to claim 1 , wherein an inner diameter of an upper end portion of the heat insulating member is slightly smaller than an outer shape of an upper end portion of the side wall of the container main body . The heat insulating container according to claim 1 or 2, wherein the container main body is made of synthetic resin, and the heat insulating member is made of paper. In portions other than the curled portion near heat insulation container according to any one of claims 1 to 3 having an air gap between the inner surface of the heat insulating member and the side wall outer surface of the container body.

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