JP3119916B2 - Insulated container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated container mainly used as an instant food container.

[0002]

2. Description of the Related Art Conventionally, as a container for ready-to-eat foods that can be served for food simply by pouring boiling water such as instant noodles,
A container made of expanded polystyrene is generally widely used because it is easy to manufacture, inexpensive, and excellent in heat insulation. To a small extent, containers of paper cup type and containers made of polypropylene containing filler are also used.

[0003]

The container made of expanded polystyrene described in the prior art has the above-mentioned advantages, but it is difficult to dispose of it because it emits toxic gas during combustion. There was a problem. Therefore, recently, there is a tendency to refrain from using it from the viewpoint of environmental health. Further, a paper cup type container or a container made of polypropylene containing a filler has a problem that, unlike a container made of expanded polystyrene, disposal by incineration is easy, but the heat insulating effect is not sufficient.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide an insulated container which has an excellent heat insulating effect and can be easily incinerated.

[0005]

In order to achieve the above object, the heat insulating container of the present invention comprises a container body formed of a molded article of a resin containing a filler, and an outer cylinder made of paperboard provided outside the container body. They are attached to form a double container, and various modifications are made to their shapes in order to enhance the heat insulating effect and facilitate the attachment.

That is, the first embodiment is an insulated container comprising a cup-shaped container main body, which is a molded product of a resin containing a filler, and a paperboard outer cylinder inserted into the outside of the body of the container main body. The upper portion of the outer cylinder is adhered to the outer periphery of a circumferential bulge formed at the upper portion of the body of the container body,
The container body is characterized in that the lower part of the outer cylinder is bonded to the outer periphery of the lower part of the body part.

A second embodiment is an insulated container comprising a cup-shaped container body, which is a molded article of a resin containing a filler, and a paperboard outer cylinder fitted outside the body of the container body. A plurality of protrusions are provided on the outer periphery of a circumferential bulge formed at the upper part of the body of the container body, and the outer cylinder is fitted and fixed to the protrusions.

[0008] In each of the above embodiments,
It is preferable to adopt a form in which the lower end of the outer cylinder is extended and an inner curl portion is formed in this extended portion. Further, a rib may be formed at the bulging portion of the container body, and a rib may be formed at a lower portion of the body of the container body.

A third embodiment is a cup-shaped container body which is a molded article of a resin containing a filler, an outer cylinder made of paperboard fitted on the outside of the body of the container body, and a container larger than the bottom of the container body. A heat insulating container comprising a paperboard bottom member arranged in a lower portion of the bottom of the container body in a shape, wherein an outer cylinder is provided on an outer periphery of a circumferential bulge formed at an upper portion of a body of the container body. Are adhered, and the bottom menco is fixed by the inner curl portion at the lower part of the outer cylinder.

[0010] In the third embodiment,
A rib may be formed on the bulging portion of the container body.

[0011]

In any heat insulating container having the above structure,
A space is formed between the body and the outer cylinder in the container body,
This space prevents the heat of the contents from being transmitted to the outer cylinder.

[0012] In the case where the lower end of the outer cylinder is provided with an inner curl portion, it can be prevented from touching the bottom of the hot container body when held by hand.

In the case where a rib is formed in the bulging portion of the container body and further in the lower portion of the body portion of the container body, heat transmitted directly from the container body to the outer cylinder is reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a first embodiment of a heat insulating container according to the present invention. The heat insulating container 1 shown in FIG. 1 is fitted into a cup-shaped container main body 2 and the outside of the container main body 2. Outer cylinder 3
It is composed of

The container body 2 is made of a polypropylene sheet containing 30 to 40% of magnesium silicate as a filler and formed into a cup shape by vacuum molding or air pressure molding. It has an outward flange 6 formed at the tip of the bulging portion 5 and further has a leg 7 at the bottom.

On the other hand, the outer cylinder 3 is made of paperboard, as shown in FIG.
Is made of a horizontally long fan-shaped blank plate 8 shown in FIG.
That is, this blank plate 8 is put on a sack sticking machine,
The ruled line a and the ruled line b are folded inward in this order, and the left end outer surface 9 and the right end inner surface 10 shown in FIG. When it is inserted into the connector 2, it is raised into a cylindrical shape as shown in FIG. And, in the state of FIG. 5, the outer cylinder 3 has an upper opening 1.
1 has the same taper as the outer periphery of the bulging portion 5 in the container body 2 and can be inserted without a gap, and the lower opening 12 has such a size that it can be inserted into the lower portion of the body 4 of the container body 2 without a gap. .

Then, the outer cylinder 3 is inserted into the container main body 2, and the inner surface near the upper opening 11 of the outer cylinder 3 is bonded to the outer periphery of the bulging portion 5 in the container main body 2 and the lower opening 12 near the outer cylinder 3. The heat insulating container 1 shown in FIG. 1 is formed by adhering the inner surface to the lower part of the body portion 4 of the container body 2 and integrating them. Therefore, a space A is formed between the body 4 and the outer cylinder 3 in the container body 2 as shown in FIG.

The insulated container 1 is sold in a state where instant food such as instant noodles is put in the container and the lid is sealed to the flange portion 6. Then, when eating the contents, the lid is partially peeled off and hot water is poured. When the contents are loosened, the lid is removed. As described above, hot water is poured into the container body 2, but since the space A is formed between the body 4 of the container body 2 and the outer cylinder 3, heat of the contents is generated by the space A. Is prevented from being transmitted to the outer cylinder 3. The heat insulating container 1 has a high strength because its side wall has a double structure.

In the heat insulating container 1 having the above-described structure, the inner container body 2 is formed of a resin containing a filler to reduce the calorie of combustion, and the outer outer cylinder 3 is made of paperboard. 1 Incineration is easy as a whole.

The container body 2, which is a molded article of a resin containing a filler, is not limited to polypropylene, and may be a molded article made of another resin mixed with a filler. As the filler, calcium carbonate, clay or the like may be used in addition to the above-mentioned magnesium silicate, and the mixing ratio of the filler can be appropriately selected within a range where the incineration of the container body 2 is easy. Here, while the calorie burned of expanded polystyrene is about 9900 kcal / kg, for example, in the case of polypropylene containing filler, it is about 7700 kcal / kg when containing 30% and about 5500 kcal / kg when containing 50%.

The vertical dimension of the outer cylinder 3 is not limited to that shown in FIG. For example, the upper end of the outer cylinder 3 is
The lower end may be longer than the container body, and in the latter case, the lower end of the outer cylinder serves as a leg, so that the lower end of the outer cylinder serves as a leg. It is not necessary to provide the legs 7 as in FIG. Further, in order to increase the strength, a rib in the longitudinal direction may be formed on the body 4 of the container body 2.

The heat insulating container 21 shown in FIG. 6 is a modification of the above embodiment. In the heat insulating container 21 shown in the figure, the upper part and the lower part of the outer cylinder 23 are respectively adhered to the outer peripheral surface of the bulging part 25 above the trunk part 24 of the container body 22 and the lower part of the trunk part 24. Is extended, and an inner curl portion 23a is formed in this extended portion. Insulated container 21 of the present embodiment
By forming the inner curled portion 23a, it is less likely to touch the hot bottom when held by hand, and the appearance is improved, and the shape of the outer cylinder 23 is distorted due to the penetration of moisture from the end face of the paper. Is prevented.

The heat insulating container 31 shown in FIG. 7 shows another modification, in which an outer cylinder 33 is attached to a container main body 32 as shown in FIGS. In the container main body 32, a plurality of ribs 35a are formed at equal intervals in the bulging portion 35 on the upper portion of the body portion 34, and the same tapered portion as the outer cylinder 33 is provided in the lower portion of the body portion 34, and this portion is also provided. A plurality of ribs 34a are formed at equal intervals. And these ribs 35
Since the outer cylinder 33 is bonded to the outer surfaces of the a and 34a, direct heat conduction from the container body 32 to the outer cylinder 33 is reduced. Further, the lower portion of the outer cylinder 33 has a larger bonding area with the container body 32 to increase the bonding strength, and the ribs 34
The heat is released from a. If necessary, only one of the rib 35a of the bulging portion 35 and the rib 34a of the lower portion of the body portion 34 may be provided.

FIG. 10 shows an embodiment of the second embodiment of the heat insulating container according to the present invention. The insulated container 41 shown in FIG.
As in the case of the heat insulating container 1, the container main body 42 is a cup-shaped container main body which is a molded article of a resin containing a filler, and an outer cylinder 43 made of paperboard inserted into the outside of the body portion 44 of the container main body 42. In addition, the outer cylinder 43 is formed by attaching the same sack as described above. A plurality of convex portions 45a are provided at equal intervals on the outer periphery of the bulging portion 45 formed on the upper portion of the body portion 44 of the container body 42, and the convex portions 45 are provided on the upper portion of the outer cylinder 43.
A plurality of holes 43a are provided at positions corresponding to a.
The projection 45a and the hole 43a are in a fitted state. That is, the outer cylinder 43 is pushed in from below the container main body 42 and the projection 45a and the hole 43a are fitted to each other so that they are integrated.

FIGS. 11 to 13 show another embodiment of the second embodiment, and show a fitting procedure of the container main body 52 and the outer cylinder 53. FIG. In this embodiment, a plurality of convex portions 55a are provided on the outer periphery of a bulging portion 55 formed on the upper portion of the body portion 54 of the container main body 52, and the convex portions 5a are provided on the upper portion of the outer cylinder 53.
A key-shaped cutout 53a is provided at a position corresponding to 5a. Then, as shown in FIG.
The cutout portion 53a is aligned with the outer tube 53 over the container body 52, and then the outer tube 53 is rotated in the direction of the arrow in FIG. 51.

As described above, the heat insulating container of the second embodiment has an advantage that the container main body and the outer cylinder can be integrated without using an adhesive. In this embodiment, the lower end of the outer cylinder may be extended to form an inner curl portion as shown in FIG. Further, a configuration in which a rib is formed in a bulging portion of the container main body, or a configuration in which a rib is formed in a lower portion of a body portion of the container main body may be employed.

FIG. 14 shows an embodiment of a third embodiment of the heat insulating container according to the present invention. The heat insulating container 61 shown in FIG. 14 has a cup-shaped container main body 62 and a fitting inserted outside the container main body 62. And a circular bottom member 67 slightly larger than the bottom of the container body 62. In this embodiment, the upper part of the outer cylinder 63 is adhered to the outer periphery of a circumferential bulging part 65 formed on the upper part of the body part 64 of the container main body 62, and the inner curl portion at the lower part of the outer cylinder 63. 63
The bottom member 67 is fixed by a. The bottom body 67 is placed in a state where the container body 62 is turned upside down and the bottom body 67 is placed on the bottom thereof.
2 and adhered to the bulging portion 65, then the inner curl portion 63a
To secure. In the present embodiment,
Since the lower part of the outer cylinder 63 is regulated by the bottom member 67,
The heat insulating space is maintained and the lower end of the outer cylinder 63 is reinforced.

In the above-described third embodiment, FIG.
And a plurality of ribs 65a on the bulge 65 as shown in FIG.
It is preferable to use the container main body 62 in which is formed. Thereby, direct heat conduction from the container main body 62 to the outer cylinder 63 is reduced. In addition, by providing the legs 68 as shown in FIG. 14 at the bottom of the container main body 62, heat can be prevented from being conducted to the bottom member 67.

In the above embodiment, the case in which a sack is used as the outer cylinder has been described. However, a flat-wound outer cylinder may be used. The flat-wound outer cylinder does not have a fold habit, and does not have a protrusion as in the case of a sack-pasted one, so that the appearance of the container is improved. In particular,
In the case of a bottom curl, there is also an advantage that the curl is finished beautifully.

The heat-insulating container of the present invention is suitable as an instant food container such as instant noodles in which hot water is poured and eaten. Needless to say, it can be used.

[0032]

As described above, in the heat insulating container of the present invention, a space is formed between the body of the container body and the outer cylinder, so that a high heat insulating effect can be exhibited.

Further, since the container body is formed of a molded article of a resin containing a filler and the outer cylinder is formed of paperboard,
Even if the container is discarded after eating the contents, it can be easily incinerated.

Further, by forming the inner curl portion by extending the lower end of the outer cylinder, the appearance of the whole container is improved, and the hand can be safely handled without touching the bottom of the container body heated by the contents. Can be held.

Further, by providing ribs on the bulging portion formed on the upper portion of the container body, and further by providing ribs on the lower portion of the body portion of the container body, a space is formed between the ribs, and Since the heat transmitted directly from the outer cylinder to the outer cylinder is reduced, the heat insulating effect can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a right half vertical sectional front view showing an example of a heat insulating container of a first embodiment.

FIG. 2 is a development view of a blank plate forming an outer cylinder.

FIG. 3 is a diagram illustrating an adhesive portion when the blank plate of FIG. 2 is stuck.

FIG. 4 is a view showing a state where the blank plate of FIG. 2 is stuck.

FIG. 5 is a perspective view showing the outer cylinder in a raised state.

FIG. 6 is a right half vertical sectional front view showing a modification of the heat insulating container shown in FIG. 1;

FIG. 7 is a right half vertical sectional front view showing another modified example of the heat insulating container shown in FIG. 1;

8 is a half top view of a container main body in the heat insulating container shown in FIG.

FIG. 9 is a front view of the same.

FIG. 10 is a right half vertical sectional front view showing an example of the heat insulating container of the second embodiment.

FIG. 11 is a front view showing another example of the heat insulating container of the second embodiment in an alignment state before the container main body and the outer cylinder are fitted to each other.

FIG. 12 is a partial front view showing a state where the outer cylinder is put on the container body.

FIG. 13 is a partial front view showing a state where the container body and the outer cylinder are fitted and fixed.

FIG. 14 is a right half vertical sectional front view showing an example of the heat insulating container of the third embodiment.

15 is a half top view of a container main body in the heat insulating container shown in FIG.

FIG. 16 is a front view of the same.

[Explanation of symbols]

 1,21,31,41,51,61 Insulated container 2,22,32,42,52,62 Container body 3,23,33,43,53,63 Outer cylinder 4,24,34,44,54,64 Body 5, 25, 35, 45, 55, 65 Swelling part 23a, 63a Inner curl part 45a, 55a Convex part 34a, 35a, 65a Rib 67 Bottom member

Continuation of front page (72) Inventor Kazuhiro Hidaka 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (56) References JP-A-2-32981 (JP, A) JP-A Heisei 4-201840 (JP, A) Japanese Utility Model 63-164479 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 81/38 B65D 25/34

Claims (7)

(57) [Claims] An insulated container comprising a cup-shaped container body, which is a molded article of a resin containing a filler, and a paperboard outer cylinder inserted outside the body of the container body. Insulation characterized in that the upper part of the outer cylinder is adhered to the outer periphery of the circumferential bulge formed in the upper part, and the lower part of the outer cylinder is adhered to the outer periphery of the lower part of the body in the container body. container. 2. An insulated container comprising a cup-shaped container main body, which is a molded article of a resin containing a filler, and an outer cylinder made of paperboard inserted into the outside of the body of the container main body, wherein the container main body has A heat insulating container, wherein a plurality of convex portions are provided on an outer periphery of a bulging portion formed at an upper portion, and an outer cylinder is fitted and fixed to the convex portions. 3. The heat insulating container according to claim 1, wherein a lower end of the outer cylinder is extended, and an inner curl portion is formed in the extended portion. 4. The heat insulating container according to claim 1, wherein a rib is formed at a bulging portion of the container main body. 5. The heat insulating container according to claim 1, wherein a rib is formed at a lower portion of a body portion of the container body. 6. A container body in the form of a cup, which is a molded article of a resin containing a filler, an outer cylinder made of paperboard fitted outside the body of the container body, and a container body having a shape larger than the bottom of the container body. A heat insulating container comprising a paperboard bottom member disposed on the lower side of the bottom, wherein the upper part of the outer cylinder is adhered to the outer periphery of a circumferential bulge formed at the upper part of the body of the container body. A heat insulating container, wherein the bottom member is fixed by an inner curl portion at a lower portion of the outer cylinder. 7. The heat insulating container according to claim 6, wherein a rib is formed at a bulging portion of the container body.