JP2000281044A - Heat insulating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulating container which prevents the heat of contents from easily propagating through the barrel part of the container even if the barrel part is held by hands at any part thereof. SOLUTION: The container comprises a radially upwardly expanding paper body 20 having an outwardly curled portion 23 along the edge of its upper opening and an radially upwardly expanding outer paper cylinder 30 having an inwardly curled portion 32 along the edge of its lower opening. The upper end portion 34 of a body portion 31 of the cylinder 30 is inwardly bent along the entire circumference thereof. The cylinder 30 is then placed on the body 20 to bring the forward end of the upper end 34 of the outer cylinder into contact with the inside of the portion 23 or into mating engagement therewith, thereby integrally bonding the cylinder 30 to the body 20 through the portion 34 or the portion 32. Since an insulating space having a predetermined thickness is formed over the whole container, the heat of contents of the container can be prevented form propagating even if the container is held by hands at any part thereof.

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 upper cylinder has an upwardly expanding paper outer cylinder having an inward curl portion at the lower opening edge, and the outer cylinder is bent in a direction in which an upper end portion of the body section is closed inward over the entire circumference. Over the paper cup body so that the tip of the upper end portion of the outer cylinder is in contact with or bites into the outward curl portion of the paper cup body, and at least one of the upper end portion and the inward curl portion of the outer cylinder It is formed by adhering to the main body and integrating them together, and a gap is formed between the paper cup main body and the outer cylinder.

[0006]

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

1 to 4 show an example of the heat insulating container according to the present invention. FIG. 1 is a side view showing the appearance of the heat insulating container, FIG. 2 is a side view of a paper cup body, and FIG. FIG. 4 is a schematic configuration diagram in which a left half and a right half respectively show a side view and a cross-sectional view, and a heat insulating container 10 shown in FIG.
Is configured by combining a paper cup body 20 shown in FIG. 2 and a hollow cylindrical outer cylinder 30 shown in FIG.

The paper cup body 20 is made of paper coated with a synthetic resin such as polyethylene on the inner surface or the inner and outer surfaces. Like a normal paper cup, the paper cup body 20 has a circular shape below the body 21 in which a fan-shaped blank is rolled. The bottom plate 22 is wound up and an outward curl portion 23 is formed at the upper opening edge. In the illustrated example, the paper cup body 20
A narrow ridge 24 protruding inwardly is formed in the circumferential direction at a position closer to the upper side of the body 21 of the body.
Serves as a reference line for pouring hot water. Also, the trunk 21 of the paper cup body 20
In the middle, a reinforcing rib composed of a circumferentially protruding portion 25 protruding outward is formed. In addition, these ridges 2
Before combining the paper cup body 20 and the outer cylinder 30, the paper cup body 20 using the male and female molds
It is formed in.

On the other hand, the hollow cylindrical outer cylinder 30 is made of simple paper or fan-shaped paper coated on one or both sides with a synthetic resin such as polyethylene. 32 are formed. Here, both the paper cup main body 20 and the outer cylinder 30 are upwardly expanded, and the outer cylinder 30 has a tapered shape in which the body 31 is slightly wider than the body 21 of the paper cup body 20.
In the vicinity of the upper part of the body of the outer cylinder 30, there is provided a concave projection 33 depressed inward in the circumferential direction.
3 is in contact with or slightly apart from the outer peripheral surface of the side wall near the upper portion of the body of the paper cup body 20, and the inward curl portion 32 of the lower opening edge of the body 31 contacts the outer peripheral surface of the lower side wall of the paper cup body 20. The size is to be. Further, as shown in an enlarged manner in FIG. 5, the upper end portion 34 of the outer cylinder 30 is bent in a tapered shape in a direction in which it is closed inward over the entire circumference, and the front end thereof is formed in the outward curl portion 2 of the paper cup body 20.
3 is in contact with the inside. Note that the bending of the upper end portion 34 is not limited to the tapered shape,
It may be bent in a curved state.

In the outer cylinder 30 as described above, the concave projections 33 are formed at the same time when a blank is punched from a paperboard by a punching machine. Affixed using. The mandrel 40 is used when a fan-shaped blank is wound around to form the inward curl portion 32. At the same time as the curl is formed, the upper end portion 34 is tapered or the upper end portion 34 is curved. State. That is, the mandrel 40
As shown in FIG. 6 and FIG. 7 which is a partially enlarged view thereof, a diagonal groove 41 having a width of 1 mm, a depth of about 2 mm and an angle of 20 to 30 degrees is formed on the entire diameter side over the entire circumference. A relief portion 42 is provided so that the concave protrusion 33 is not crushed when the blank is wound. Then, in the first curl step, the upper end portion 34 of the outer cylinder 30 is pushed into the oblique groove 41 of the mandrel 40 as shown in FIG. 2
The inward curl portion 32 is formed in the curl process. After the curl portion forming step, when the outer cylinder 30 is detached from the mandrel 40, the upper end portion 34 of the outer cylinder 30 is bent inward in a tapered shape over the entire circumference. Alternatively, by appropriately setting the shape of the groove 41 and the pressing force into the groove 41, the upper end portion 34 can be formed in a curved shape.

Then, the outer cylinder 30 having the above-described configuration is put over the paper cup body 20 and inserted, and the tip of the upper end portion 34 of the outer cylinder 30 is brought into contact with or cut into the inside of the outward curl portion 23 of the paper cup body 20. The upper end portion 34 of the outer cylinder 30 is fixed to the outer curl portion 23 of the paper cup body 20 by a means such as an emulsion adhesive previously applied to the outer peripheral surface of the body near the lower side of the outward curl portion 23 of the paper cup body 20. The heat insulating container 10 shown in FIG. 1 and FIG. Alternatively, the inner surface of the concave projection 33 of the outer cylinder 30 may be bonded to the outer peripheral surface of the side wall near the upper part of the body of the paper cup body 20 by means of an emulsion adhesive or the like to integrate them. Further, depending on the use form, the portion of the inward curl portion 32 formed at the lower opening edge of the outer cylinder 30 is also adhered to the outer peripheral surface of the side wall below the paper cup main body 20 to form the paper cup main body 20.
And the outer cylinder 30 may be more securely connected. Further, when the tip of the upper end portion 34 of the outer cylinder 30 is sufficiently digged into the inside of the outward curl portion 23 of the paper cup body 20, the portion of the inward curl portion 32 of the outer cylinder 30 is positioned below the paper cup body 20. Can be fixed simply by adhering to the outer peripheral surface of the side wall.

When the diameter of the upper end edge of the outer cylinder 30 and the diameter immediately below the outward curl portion of the paper cup body 20 are made substantially the same as in the heat insulating container described in the prior art, the concave projection 3
In the case where 3 is provided, since it protrudes inward, it cannot be completely inserted when the outer cylinder 30 is put on the paper cup body 20, and the lower part of the outer cylinder 30 protrudes from the lower part of the paper cup body 20. Therefore, in the above-described example, the inner diameter of the outer cylinder 30 is increased by an amount corresponding to the concave projection 33 to enable insertion, and the taper is formed in such a manner that the outer cylinder 30 is tapered in a direction in which it is closed inward over the entire circumference of the upper end portion. By keeping the paper cup body 20 in the bent state, it is possible to prevent the upper end portion 34 of the outer cylinder 30 from colliding with the outward curl portion 23 of the paper cup body 20,
The insertion can be done smoothly. Therefore, there is no slack at the upper end of the outer cylinder 30 and no appearance defect occurs.

In the heat-insulating container 10 having the above-described structure, a space is formed between the body 21 of the paper cup body 20 and the body 31 of the outer cylinder 30, and the space functions as a heat insulator.
In addition, since a concave projection 33 which is depressed inward is provided near the upper part of the body of the outer cylinder 30, the concave projection 33 is provided from below.
Voids are formed at certain intervals up to the point. Therefore, for example, when hot water is put into the heat insulating container 10, the heat of the inner body 21 is prevented from being transmitted to the outer body 31 over a wide range, and any place where such a container is usually gripped is used. Even if you grab and hold it, it will not get hot.
Further, in the above example, since the reinforcing ribs composed of the circumferentially projecting portions 25 projecting outwardly are formed on the body portion 21 of the paper cup body 20, the strength of the paper cup body 20 is reduced by the projecting portions 25. As it rises, it serves as a support so that the body 31 of the outer cylinder 30 does not bend inward. Therefore, when held by hand, the gap between the body 21 of the paper cup body 20 and the body 31 of the outer cylinder 30 Is prevented from becoming narrow.

FIG. 9 shows another example of the heat-insulating container according to the present invention. The left half and the right half are schematic structural views showing a side view and a cross-sectional view, respectively.
Is configured by combining the same paper cup main body 20 as shown in FIG. 2 and an outer cylinder 30 having a different shape from that shown in FIG.

The outer cylinder 30 used in this example is the outer cylinder 3 shown in FIG.
No concave protrusion 33 in the circumferential direction at 0 is provided. Then, as shown in an enlarged manner in FIG. 10, the upper end portion 34 of the outer cylinder 30 is bent in a curved state in a direction in which the outer cylinder 30 is closed inward over the entire circumference, and the tip thereof abuts on the inside of the outward curl portion. It is sized. The upper end portion 34 may be bent in a tapered shape as in the example described above, instead of being curved. This upper end portion 34
Is bent during the curl forming step of the inward curl portion 32 using the same mandrel as described above.

Then, the outer cylinder 30 having the above-described structure is put on the paper cup body 20 and inserted, and the tip of the upper end portion 34 of the outer cylinder 30 is brought into contact with or cut into the inside of the outward curl portion 23 of the paper cup body 20. The upper end portion 34 of the outer cylinder 30 is fixed to the outer curl portion 23 of the paper cup body 20 by a means such as an emulsion adhesive previously applied to the outer peripheral surface of the body near the lower side of the outward curl portion 23 of the paper cup body 20. The heat insulating container 10 shown in FIG. 9 is formed by bonding the two to each other to integrate them.
Further, depending on the use form, the inward curl portion 32 formed at the lower opening edge of the outer cylinder 30 may also have
May be adhered to the outer peripheral surface of the lower side wall to further securely connect the paper cup body 20 and the outer cylinder 30. Further, similarly to the above-described example, when the tip of the upper end portion 34 of the outer cylinder 30 is sufficiently digged into the inside of the outward curl portion 23 of the paper cup body 20, the inward curl portion 32 of the outer cylinder 30 is required. Can be fixed simply by bonding the portion to the outer peripheral surface of the side wall below the paper cup body 20.

In the heat-insulating container 10 having this configuration, a space is formed between the body 21 of the paper cup body 20 and the body 31 of the outer cylinder 30, and the space functions as a heat insulator.
Therefore, for example, when hot water is put into the heat insulating container 10, the heat of the inner body 21 is prevented from being transmitted to the outer body 31 over a wide range, and any place where such a container is usually gripped is used. Even if you grab and hold it, it will not get hot. Also in this example, since the reinforcing ribs composed of the circumferentially protruding portions 25 projecting to the outer surface side are formed on the body portion 21 of the paper cup main body 20, the strength of the paper cup main body 20 is increased by the protruding portions 25 while the strength is increased. Since the torso 31 of the outer cylinder 30 serves as a support so as not to bend inward, the gap between the torso 21 of the paper cup body 20 and the torso 31 of the outer cylinder 30 is narrow when held by hand. Is prevented.

FIG. 11 shows a modified example of the heat insulating container shown in FIG. 4, and is a schematic configuration diagram showing a left half and a right half in a side view and a sectional view, respectively. The heat-insulating container 10 shown in FIG. 11 has substantially the same configuration as that shown in FIG.
5 in that the outer cylinder 30 is formed of a paperboard embossed so as to form the outer cylinder 30. The raised portion 35 does not need to be formed for all characters and patterns, but may be formed only for characters and patterns to be emphasized.
The heat insulating container 10 having such a configuration is the heat insulating container 1 shown in FIG.
It exhibits the same heat insulating effect as that of No. 0, but especially the raised portion 3
In the case of No. 5, the heat insulating effect is increased due to the large gap.

FIG. 12 shows another modified example of the heat insulating container shown in FIG. 4, and is a schematic configuration diagram showing a left half and a right half in a side view and a sectional view, respectively. The heat-insulating container 10 shown in FIG. 12 has substantially the same configuration as that shown in FIG. 4, but is made of a paperboard obtained by performing fine embossing over the entire outer surface. 30 is different. The heat-insulating container 10 having such a configuration exhibits the same heat-insulating effect as the heat-insulating container 10 of FIG. 4, but in addition to the heat-insulating effect of the space between the paper cup body 20 and the outer cylinder 30, The fine irregularities on the surface of the cylinder 30 make it easy to hold and hardly transmit heat to the hand, so that the heat insulation effect is further improved as a whole. In addition, in the example of FIG. 12, the uneven pattern by embossing is formed over the entire body of the outer cylinder. However, 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.

FIG. 13 shows a further modification of the heat insulating container shown in FIG. 4, and is a schematic configuration diagram showing a left half and a right half in a side view and a sectional view, respectively. The heat insulating container 10 shown in FIG. 13 has substantially the same configuration as that shown in FIG. 4, but performs a fine embossing process on substantially the entire outer surface, and prints characters and characters. The difference is that the outer cylinder 30 is formed of a paperboard embossed so that the pattern forms an outwardly raised portion 35. The raised portion 35 does not need to be formed for all characters and patterns, but may be formed only for characters and patterns to be emphasized. Insulated container 1 having such a configuration
0 exerts the same heat-insulating action as the heat-insulating container 10 of FIG. 4, but the heat-insulating action is increased particularly in the raised portion 35 due to the large gap, and the heat-insulating action due to the fine irregularities on the surface of the outer cylinder 30 is also added. As a result, the heat insulation effect is further improved as a whole. In the example of FIG. 13, the uneven pattern by embossing is formed over the entire surface of the body of the outer cylinder. However, a part in which the uneven pattern is not formed may be partially left. For example, it may be left in the form of a strip above and below the trunk in consideration of the area held by the hand, or may be left in the raised portion 35 in consideration of the design.

Each of the heat insulating containers shown in FIGS.
As in the case of the heat insulating container 10 of FIG. 4, the outer cylinder 30 having this configuration is placed over the paper cup body 20 and inserted, and the tip of the upper end portion 34 of the outer cylinder 30 is brought into contact with the inside of the outward curl portion 23 of the paper cup body 20. The upper end portion 34 of the outer cylinder 30 is fixed to the paper cup body 20 by means of an emulsion adhesive or the like which has been applied to the outer peripheral surface of the body near the lower side of the outward curl portion 23 of the paper cup body 20 in advance. It is assembled by adhering to the inside of the outward curl portion 23 and integrating them. Alternatively, the inner surface of the concave projection 33 of the outer cylinder 30 may be bonded to the outer peripheral surface of the side wall near the upper part of the body of the paper cup body 20 by means of an emulsion adhesive or the like to integrate them. Further, the portion of the inward curl portion 32 formed at the lower opening edge of the outer cylinder 30 may be bonded to the outer peripheral surface of the lower side wall of the paper cup body 20. Further, when the tip of the upper end portion 34 of the outer cylinder 30 is sufficiently digged into the inside of the outward curl portion 23 of the paper cup body 20, the portion of the inward curl portion 32 of the outer cylinder 30 is positioned below the paper cup body 20. Can be fixed simply by bonding to the outer peripheral surface of the side wall.

In each of the above-described examples, the barrel 2 of the paper cup body 20 is used as an injection reference line as a guide when pouring hot water.
Although a narrow ridge 24 that protrudes inward on the inner surface side at the upper position of 1 is formed in the circumferential direction, the ridge 24 may protrude on the outer surface side. In any case, it is preferable that the position of the adhesive for bonding be higher than the injection reference line.

Further, of the plurality of examples described above, the outer cylinder 30
The one provided with the concave projection 33 near the upper part of the torso
Although the concave projections 33 are continuously formed in a band shape over the entire circumference except for one joint, the concave projections 33 may be provided in a discontinuous state. The shape of the concave projection may be any other shape such as a circular shape or an elliptical shape in addition to the band shape.

[0024]

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. The outer cylinder is bent in such a direction that the upper end of the body part closes inward over the entire circumference, and the outer cylinder is placed on the paper cup body, and the tip of the upper end of the outer cylinder is formed. Is formed by abutting or biting the inside of the outward curl portion of the paper cup body, and bonding to the paper cup body at at least one of the upper end portion and the inward curl portion of the outer cylinder to integrate them together. Since a gap is formed between the paper cup main body and the outer cylinder, a gap for heat insulation is formed at a certain interval over a wide range from the lower part to the upper part of the trunk. Any of the department And excellent thermal insulation that is also easily transmitted heat of the contents with the Tokoro by hand. And
When assembling the paper cup main body and the outer cylinder, the upper end portion of the outer cylinder is bent in a tapered or curved shape inward and abuts or bites into the outward curl portion of the paper cup main body. Since the collision with the side is prevented, the outer cylinder can be smoothly inserted into the paper cup main body, and the appearance does not deteriorate.

[0025] Further, by forming the outer cylinder in such a manner that a concave projection which is depressed inward is provided in the vicinity of the upper part of the body in the circumferential direction, voids are formed at a certain interval from below to the concave projection. In addition, since the concave projection serves as a support when held by hand and the gap is prevented from being narrowed, the heat insulating effect is further improved.

Further, by forming the outer cylinder from a paperboard embossed so that the characters or patterns to be printed form the outwardly protruding portions, the characters or patterns to be printed on the surface of the outer cylinder are raised. Since the protruding portion is formed by the sock portion, the heat insulating effect is improved, and a design excellent in design that characters and patterns are emphasized by the unevenness is provided.

Further, since the outer cylinder is formed of a paperboard formed by performing fine embossing over substantially the entire outer surface, the outer cylinder has irregularities due to the embossing. In addition, it is easy to transfer heat to the hand, and it is possible to obtain a product having an unconventional design in terms of design due to the uneven pattern.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a heat insulating container according to the present invention.

FIG. 2 is a side view of a paper cup main body constituting the heat insulating container shown in FIG.

FIG. 3 is a side view of an outer cylinder constituting the heat insulating container shown in FIG.

FIG. 4 is a schematic configuration diagram of the heat insulating container shown in FIG.

FIG. 5 is a partially enlarged view showing an upper right portion of the outer cylinder of FIG. 3 in an enlarged manner.

FIG. 6 is a side view of a mandrel used to make the outer cylinder of FIG. 3;

FIG. 7 is an enlarged sectional view of a portion A in FIG. 6;

FIG. 8 is an explanatory view showing a state in which the upper end portion of the outer cylinder is tapered by the mandrel of FIG. 6;

FIG. 9 is a schematic configuration diagram showing another example of the heat insulating container according to the present invention, in which a left half and a right half respectively show a side view and a cross-sectional view.

10 is a partially enlarged view showing an upper right portion of the outer cylinder in the heat insulating container of FIG. 9 in an enlarged manner.

11 shows a modification of the heat-insulating container shown in FIG. 4, and is a schematic configuration diagram showing a left half and a right half in a side view and a cross-sectional view, respectively.

12 is a schematic configuration diagram showing another modified example of the heat insulating container shown in FIG. 4, and showing a left half and a right half in a side view and a cross-sectional view, respectively.

FIG. 13 is a schematic configuration diagram showing still another modified example of the heat insulating container shown in FIG. 4, and showing a left half and a right half in a side view and a sectional view, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat insulation container 20 Paper cup main body 21 Body 22 Bottom plate 23 Outward curl part 24 Ridge 25 Convex part 30 Outer cylinder 31 Body part 32 Inward curl part 33 Concave protrusion 34 Upper end part 35 Embossed part 40 Mandrel 41 Groove 42 Escape

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Hagiwara 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 Dai Nippon Printing Co., Ltd. (72) Katsuhiro Yamagata 1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo 1-1-1 Within Dai Nippon Printing Co., Ltd. (72) Kazuki Yamada Ichigaya, Ichigaya-cho, Shinjuku-ku, Tokyo 1-1-1 1-1 Dai Nippon Printing Co., Ltd. (72) Inventor Yukihiro Kanoya 1010 Nippon Cup Co., Ltd., 591 Kamihirose, Oaza, Sayama City, Saitama Prefecture

Claims (7)

[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. The outer cylinder is bent so that the upper end of the body is closed inward over the entire circumference, and the outer cylinder is placed over the paper cup body, and the tip of the upper end of the outer cylinder is curled outward in the paper cup body. The paper cup body and the outer cylinder are formed by adhering to the paper cup body at least at one of the upper end portion and the inward curl portion of the outer cylinder and affixing them to the inside of the outer cup. A heat-insulating container, wherein a void is formed therebetween. 2. The heat-insulating container according to claim 1, wherein a concave projection that is concave inward is provided in the vicinity of the upper part of the outer cylinder in the circumferential direction. 3. The heat-insulating container according to claim 2, wherein the concave protrusion in the circumferential direction provided near the upper part of the body of the outer cylinder is discontinuous. 4. The heat-insulating container according to claim 1, wherein an injection reference line is provided on the body portion of the paper cup main body, the injection reference line comprising a circumferential ridge projecting from the inner surface or the outer surface. 5. The heat-insulating container according to claim 1, wherein a reinforcing rib is formed on the body of the paper cup main body, the reinforcing rib comprising a circumferentially protruding portion projecting outwardly. 6. The printed character or pattern portion of the outer cylinder forms an outwardly protruding portion.
A heat-insulating container according to any one of the above. 7. The heat-insulating container according to claim 1, wherein fine embossing is applied to substantially the entire outer surface of the outer cylinder.