JP2001180647A - Heat insulating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent heat insulating container wherein heat of contents is hardly transferred whichever part of a barrel is held by a hand. SOLUTION: The heat insulating container comprises a paper cup body 10 which widens upwardly and a paper outer cylinder 20 which widens upwardly, wherein an expanded portion 14 protruding outward by a taper different from that of a barrel 11 of the body 10 is provided along a peripheral direction in the vicinity of the middle of the barrel 11. The outer cylinder 20 is put over the cup body 10, forming both as a single unit by sticking to the cup body via at least an upper end 23 of the outer cylinder 20 or an inward curl 22. Since voids for heat insulation are formed at predetermined intervals around a whole body, the container is so excellent in heat insulation that heat of the contents is hardly transferred whichever part of the barrel is held by a hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cup-shaped container for storing instant foods such as instant noodles, and more particularly to a container having excellent heat insulating properties which can be poured into hot water and eaten as it is.

[0002]

2. Description of the Related Art In general, plastic containers such as expanded polystyrene have been widely used as this kind of cup-shaped heat-insulating container. As an alternative, there has been proposed a heat insulating container made of paper in which a body portion is doubled to form a heat insulating space as seen in Japanese Utility Model Application Laid-Open No. 4-45212.

[0003]

The heat-insulating container described in the prior art disclosed in Japanese Utility Model Laid-Open No. 4-45212 has a simple structure in which a normal paper cup is combined with a bottomless outer cylinder having a different taper. Thus, there is an advantage that a cup having an insulating effect can be obtained. And since the space | gap for heat insulation goes down, it becomes large, and shows a favorable heat insulation effect by normal holding. However, there is a problem that if the state of holding the upper portion for a long time lasts for a long time, there is no or a small space for exhibiting the heat insulating effect, and the space gradually becomes hot.

[0004] The present invention has been made to solve the above problems, and has as its object the following.
It is an object of the present invention to provide an excellent heat-insulating container in which the heat of the content is hardly transmitted even when the user holds the body at any place.

[0005]

In order to achieve the above-mentioned object, a heat-insulating container according to the present invention comprises an upwardly expanding paper cup body having an outwardly curled portion at an upper opening edge, and an upper and lower opening. The paper cup body has an upwardly expanding paper outer cylinder having an inward curl portion at the lower opening edge, and an enlarged portion protruding outward by a taper different from the taper of the body portion in the middle of the body portion of the paper cup body. The paper cup body is formed by attaching the outer cylinder to the paper cup body, bonding the paper cup body to the paper cup body at at least one of the upper end portion and the inward curl portion of the outer cylinder, and integrating them together. An air gap is formed between the cylinders.

[0006]

Next, embodiments of the present invention will be described with reference to some examples.

FIG. 1 shows an example of a heat insulating container according to the present invention, in which the left half and the right half are schematically shown in a front view and a sectional view, respectively. It is configured by combining a main body 10 and a hollow cylindrical outer cylinder 20 that is open both above and below.

The paper cup body 10 is made of paper coated with a synthetic resin such as polyethylene on the inner surface or the inner and outer surfaces thereof. Like a normal paper cup, the paper cup body 10 has a circular shape below the body 11 in which a fan-shaped blank is rolled. An outer curl portion 13 is formed at the upper opening edge by tightening the bottom plate 12, and a torso portion 11 is provided near the center of the torso portion 11.
An enlarged portion 14 which protrudes outward by a taper different from that of FIG. That is, the step portion a is formed by giving a taper of an upper spread different from the taper of the upper spread of the body portion 11, a taper in a vertical direction, or a taper of a downward spread in an opposite direction. Further, at a position slightly below the body 11 of the paper cup body 10, a reinforcing rib 15 formed of a circumferentially projecting portion projecting outward is formed. These enlarged portions 14 and reinforcing ribs 15 are formed on the paper cup body 10 using a male mold and a female mold before the paper cup body 10 and the outer cylinder 20 are combined. Here, the enlarged portion 14 of the paper cup body 10 is formed by inserting an expandable male mold into the paper cup body 10 and pushing the male mold toward the outer female mold.
In this case, the die can be easily removed without being caught by providing a taper having an upward expansion or a vertical taper different from the taper of the body portion 11.

On the other hand, the hollow cylindrical outer cylinder 20 is made of a single piece of paper or a fan-shaped paper coated on one or both sides with a synthetic resin such as polyethylene. 22 are formed. Here, both the paper cup main body 10 and the outer cylinder 20 are upwardly expanded, and the outer cylinder 20 has a taper whose trunk 21 is slightly wider than the trunk 11 of the paper cup main body 10,
Further, in the illustrated example, the upper end portion 23 of the outer cylinder 20 is bent in a tapered shape so as to close inward over the entire circumference.
Its tip is sized to abut the inside of the outward curl 13 of the paper cup body 10. Note that the bending of the upper end portion 23 is not limited to a tapered shape, and may be bent in a curved state.

Then, the outer cylinder 20 having the above-described configuration is put over the paper cup body 10 and inserted, and the tip of the upper end portion 23 of the outer cylinder 20 is brought into contact with the inside of the outward curl portion 13 of the paper cup body 10 or bites into it. The upper end portion 23 of the outer cylinder 20 is fixed to the outer curl portion 13 of the paper cup body 10 by a means such as an emulsion adhesive applied to the outer peripheral surface of the body near the lower side of the outward curl portion 13 of the paper cup body 10 in advance. The heat insulating container C shown in FIG. 1 is formed by bonding the two to each other to integrate them. Depending on the usage mode, the inward curl portion 22 formed at the lower opening edge of the outer cylinder 20 is also adhered to the outer peripheral surface of the lower side wall of the paper cup main body 10 to more securely connect the paper cup main body 10 and the outer cylinder 20. It may be. When the tip of the upper end portion 23 of the outer cylinder 30 is sufficiently digged into the inside of the outward curl portion 13 of the paper cup body 10, the portion of the inward curl portion 22 of the outer cylinder 20 is positioned below the paper cup body 10. Can be fixed simply by adhering to the outer peripheral surface of the side wall.

In the heat-insulating container C having the above-described configuration, a gap is formed between the body 11 of the paper cup body 10 and the body 21 of the outer cylinder 20, and the gap serves as a heat insulating function. In addition, an enlarged portion 14 protruding outward is provided in the vicinity of the center of the body 11 of the paper cup body 10 in the circumferential direction.
Voids are formed at a certain interval from below to the enlarged portion 14, and voids are also formed above the enlarged portion 14. Therefore, when hot water is put into the heat-insulating container C, the heat of the inner body 11 is prevented from being transmitted to the outer body 21 over a wide range. It doesn't get hot even if you grab it and hold it. Further, in the above example, the body rib 11 of the paper cup main body 10 is formed with the reinforcing rib 15 formed of a circumferentially projecting portion projecting to the outer surface below the enlarged portion 14,
The reinforcing ribs 15 increase the strength of the paper cup body 10 and also serve to support the body 21 of the outer cylinder 20 so that the body 21 does not bend inward. The gap between the body 11 and the body 21 of the outer cylinder 20 is prevented from becoming narrow.

FIG. 2 shows a modification of the heat insulating container shown in FIG. 1. The heat insulating container C shown in FIG. 2 has substantially the same structure as that shown in FIG. The upper end portion of the tube 20 is not bent in a tapered shape in a direction in which it is closed inward over the entire circumference, and remains straight. In this type of heat-insulating container C, the upper end of the outer cylinder 20 is made narrower above the outer cylinder 20 in order to make the upper end of the outer cylinder 20 easily abut or bite into the inside of the outward curl portion 13 of the paper cup body 10. A good taper is recommended. FIG. 1 shows that at least one of the upper end portion of the outer cylinder 20 and the inward curl portion 22 adheres to the paper cup main body 10 to be integrated with each other and forms a gap between the paper cup main body 10 and the outer cylinder 20. This is the same as the case of the heat insulating container C shown.

In the example shown in FIGS. 1 and 2, the enlarged portion 14 of the body 11 of the paper cup body 10 is provided in a continuous state in the circumferential direction, but the enlarged portion 14 is in a discontinuous state in the circumferential direction. May be provided.

The outer cylinder 20 has a product name, a picture, and the like printed on the surface thereof. Then, a blank having a fan shape is formed by punching the printed web, and the blank is rolled and adhered to the body, and an inward curl portion 22 is formed at a lower opening edge to form an outer cylinder 20.
Is formed. Here, although there is also a meaning of protecting the printed pattern and the like, in order to easily curl the paper, an OP varnish is usually printed on the outermost layer at the time of printing the raw material. But,
Since this OP varnish repels the emulsion adhesive, the inward curl portion 22 of the outer cylinder 20 cannot be bonded to the lower portion of the body of the paper cup body 10. It is conceivable to use an adhesive other than an emulsion adhesive.However, due to problems with heat resistance and odor, and because of the ease of handling, use the same emulsion adhesive that is currently used for body sticking. It is desired to do.

When the inward curl portion 22 of the outer cylinder 20 is adhered to the outer peripheral surface of the side wall below the paper cup main body 10, a pattern as shown in FIG. Use blank B on which OP varnish 24 is printed. That is, the OP varnish 24 is printed in a pattern excluding a portion inside the inward curl portion 22 of the outer cylinder 20. The pattern illustrated in FIG. 3 regularly leaves a rectangular uncoated portion 25 along the lower end of the blank B. Actually, the emulsion adhesive is applied around the outer periphery of the paper cup body 10 and the outer cylinder 20 is put thereon, so that the adhesive can be adhered if at least a part not applied is present. Therefore,
The pattern of the uncoated portion may be arbitrary, and it is not necessary to leave the pattern uniformly over the entire circumference as shown in FIG. It is sufficient if there is an uncoated portion. In the figure, reference numeral 26 denotes a body sticking portion, where the OP varnish is naturally not applied.

As described above, instead of leaving the uncoated portion of the OP varnish, the following means may be taken. That is,
The OP varnish is applied to the entire surface except for the body sticking portion, and the inside of the inward curl portion is scratched by half cutting or shaving. The scratch may be provided evenly over the entire portion of the paper cup body 10 that comes into contact with the outer surface of the body portion 11, or may be provided only on a part thereof. If such flaws are formed, the emulsion adhesive penetrates into the paper of the outer cylinder 20 through the flaws, so that the inward curl portion 22 of the outer cylinder 20 is bonded to the outer surface of the body 11 of the paper cup body 10. You can do it.

The heat-insulating container of the present invention may use an outer cylinder made of paperboard which is embossed so that characters and patterns to be printed are raised outward to form a convex portion. The convex portion need not be formed for all characters and patterns, but may be formed only for characters and patterns to be emphasized. The heat insulating container having such a configuration is shown in FIGS.
Exhibits the same heat-insulating action as the heat-insulating container C shown in FIG.
In particular, since the gap is wide in the convex portion, the heat insulating effect is increased.

Further, the heat insulating container of the present invention may use an outer cylinder formed of a paperboard obtained by performing a fine embossing process on the entire outer surface. The heat-insulating container having such a structure exhibits the same heat-insulating effect as the heat-insulating container C of FIG. 1, but in addition to exhibiting the heat-insulating effect by the gap between the paper cup body and the outer cylinder, the surface of the outer cylinder also It is easy to hold due to the fine irregularities, and it is difficult for heat to be transmitted to the hands, so that the heat insulation effect as a whole is more excellent. The uneven pattern by embossing may be formed over the entire surface of the body portion of the outer cylinder, or a part in which the uneven pattern is not formed may be partially left. For example, a band may be left above and below the torso in consideration of the area held by the hand, or a name part may be left in a pattern in consideration of the design.

[0019]

The heat-insulating container according to the present invention has an upwardly-opening paper cup body having an outwardly curled portion at an upper opening edge, and an upwardly-expanding paper cup body which is open at both upper and lower sides and has an inwardly curled portion at a lower opening edge. In the middle of the body of the paper cup body, an enlarged portion protruding outward with a taper different from the taper of the body is provided in the circumferential direction in the middle of the body of the paper cup body. At least one of the upper end portion and the inward curl portion of the outer cylinder is adhered to the paper cup main body to form an integral body, and a gap is formed between the paper cup main body and the outer cylinder. Because heat-insulating voids are formed at certain intervals over a wide range from the lower part to the upper part of the body, it is difficult to transfer the heat of the contents even if you hold any part of the body by hand. For heat insulation It becomes what was.

Further, by adopting a configuration in which the upper end portion of the outer cylinder is bent in a direction in which it is closed inward over the entire circumference, the gap is increased, and the heat insulating effect is further improved.

An OP varnish is printed on the surface except for a part inside the inward curl portion of the outer cylinder, or a scratch is made on the inside of the inward curl portion of the outer cylinder. When the inward curl portion of the outer cylinder is bonded to the outer peripheral surface of the lower side wall of the paper cup main body by using the configuration in which And gluing can be compatible.

[Brief description of the drawings]

FIG. 1 shows an example of a heat insulating container according to the present invention.
It is a schematic block diagram which shows a left half and a right half by a front view and a sectional view, respectively.

FIG. 2 is a schematic configuration diagram showing a modified example of the heat insulating container shown in FIG. 1 and showing a left half and a right half in a front view and a sectional view, respectively.

FIG. 3 is an explanatory view showing a coated portion of an OP varnish in a blank of an outer cylinder.

[Explanation of symbols]

 C Heat insulating container 10 Paper cup body 11 Body 12 Bottom plate 13 Outward curl part 14 Enlarged part 15 Reinforcement rib 20 Outer cylinder 21 Body part 22 Inward curl part 23 Upper end part 24 OP varnish 25 Uncoated part 26 Body sticking part a step Department

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiro Yamagata 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Inventor Kazuhiro Hidaka 1-chome, Ichigaya-cho, Shinjuku-ku, Tokyo No. 1-1 Inside Dai Nippon Printing Co., Ltd. (72) Inventor Yukihiro Kamiya 591, Kamihirose, Oaza, Sayama City, Saitama Prefecture Inside the 10 Large Nippon Cup Co., Ltd. (72) Keiichi Sekine 591, Kamihirose Oaza, Sayama City, Saitama Prefecture No. 10 Japan Cup Co., Ltd. (72) Inventor Yasuhiro Kushida 591 Kamihirose, Oyama, Sayama City, Saitama F-term (reference) in the Japan Co., Ltd. ED03 FA04 GA12

Claims (6)

[Claims] 1. An upwardly expanding paper cup body having an outwardly curled portion at an upper opening edge, and an upwardly expanding paper outer cylinder having an upwardly and downwardly opening curled portion open at both upper and lower sides. In the middle of the body of the paper cup body, an enlarged portion protruding outward by a taper different from the taper of the body is provided in the circumferential direction, and the paper cup body is covered with the outer cylinder, and the upper end of the outer cylinder is provided. A heat-insulating container, which is formed by adhering to a paper cup main body at least at one of an inward curl portion and integrating them together, and forming a gap between the paper cup main body and an outer cylinder. 2. The heat insulating container according to claim 1, wherein the enlarged portion is provided continuously in a circumferential direction. 3. The heat insulating container according to claim 1, wherein the enlarged portion is provided in a discontinuous state in a circumferential direction. 4. The heat-insulating container according to claim 1, wherein an upper end portion of the outer cylinder is bent in a direction to close inward over the entire circumference. 5. The heat-insulating container according to claim 1, wherein an OP varnish is printed on a surface of the outer cylinder except for a part inside the inward curl portion. 6. The heat-insulating container according to claim 1, wherein a flaw is formed inside the inward curl portion of the outer cylinder.