JP3544883B2 - Insulated container - Google Patents

Description

[0001]
TECHNICAL 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 that can be poured into hot water and eaten as it is.
[0002]
[Prior art]
Generally, plastic containers such as expanded polystyrene have been frequently used as this kind of cup-shaped heat insulating container.However, since these become a pollution problem when discarded, as an alternative, for example, As disclosed in Japanese Utility Model Laid-Open Publication No. 4-45212, there has been proposed a paper-made heat-insulating container having a double-walled body and a gap for heat insulation.
[0003]
[Problems to be solved by the invention]
In the heat-insulating container described in Japanese Unexamined Utility Model Publication No. 4-45212 described in the prior art, a cup having the heat-insulating effect can be obtained by a simple structure in which an ordinary paper cup is combined with a bottomless outer cylinder having a different taper. There is an advantage. And since the space | gap for heat insulation goes down, it becomes large, and demonstrates a favorable heat insulation effect by normal holding. However, there is a problem that if the state where the user holds the upper portion for a long time continues, the space gradually becomes hot because there is no or small space for exhibiting the heat insulating effect.
[0004]
The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide an excellent heat insulation in which the heat of the content is hardly transmitted even if any part of the body is held by hand. To provide a sex container.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the heat insulating container according to the present invention comprises an upwardly expanding paper cup body having an outward curl portion at an upper opening edge, and an inward curl portion opening at both upper and lower sides and a lower opening edge. consists of a outer tube over steel spreading of paper with, the outer cylinder has its body portion has a taper skirt spread slightly from the body of the paper cup body, adjacent outwardly curled portion of the paper cup body Waso The upper end portion is obliquely bent with a different taper from the taper of the body portion so that the upper end portion further expands outwardly over the entire circumference , that is, 0.1 to 2.0 mm in the diameter direction in addition to the circumferential length of the opening. The outer cylinder is placed over the paper cup body, and the tip of the upper end portion of the outer cylinder is brought into contact with or biting into the outward curl portion of the paper cup body, and the upper end portion and the inward curl portion of the outer cylinder are At least It is formed by an integral, both being bonded to the paper cup body either, is characterized in that the air gap is formed between the paper cup body and the outer cylinder. Further, the outer cylinder may be configured such that an upper end portion thereof is bent in a direction of closing inward over the entire circumference.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to some examples.
[0007]
FIG. 1 shows an example of a heat-insulating container according to the present invention, in which a left half and a right half are schematic configuration diagrams showing a side view and a cross-sectional view, respectively. The heat-insulating container 10 shown in FIG. And an outer cylinder 30 having a hollow cylindrical shape that is open both above and below.
[0008]
The paper cup main body 20 is made of paper coated with a synthetic resin such as polyethylene on the inner surface or the inner and outer surfaces, and a circular bottom plate 22 is provided below a body 21 in which a fan-shaped blank is rolled, like a normal paper cup. The outer curl portion 23 is formed on the upper opening edge while being tightened. Further, the illustrated paper cup body 20 is formed with a narrow ridge 24 protruding inwardly in the circumferential direction at a position closer to the upper side of the body portion 21, and this ridge 24 is a guide when pouring hot water. It serves as an injection reference line. Further, in the middle of the body portion 21 of the paper cup body 20, a reinforcing rib composed of a circumferentially protruding portion 25 protruding outward is formed. The ridges 24 and the convex portions 25 are formed on the paper cup body 20 using male and female dies before the paper cup body 20 and the outer cylinder 30 are combined. The paper cup body 20 is bent so that the upper end portion 26 adjacent to the outward curl portion 23 is further expanded outwardly over the entire circumference. The bending of the upper end portion 26 is formed simultaneously with the curl forming step of the outward curl portion 23.
[0009]
In the paper cup body 20 of FIG. 1, as shown in FIG. 2A, the upper end portion 26 is bent by a shape using a straight line a having a different taper from the body portion 21. As shown in FIG. 2B, a shape using one curve b (curvature R) of the curvature R may be used, or as shown in FIG. 2C, two curves c and R of curvatures R ₁ and R ₂ may be used. d may be connected. The size to be expanded varies depending on the thickness, basis weight and elongation of the paper, in addition to the peripheral length of the opening, but it is necessary that the extent of curling does not occur. Specifically, it is about 0.1 to 2.0 mm in the diameter direction, and preferably about 0.1 to 1.0 mm.
[0010]
On the other hand, the hollow cylindrical outer cylinder 30 is made of paper alone or fan-shaped paper coated on one or both sides with a synthetic resin such as polyethylene, and has an inward curl portion 32 formed at the lower opening edge of the body portion 31. Have been. Here, both the paper cup 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 at the bottom than the body 21 of the paper cup body 20. The upper end of the body of the outer cylinder 30 contacts the inside of the outward curl portion 23 of the paper cup body 20, and the inward curl 32 of the lower opening edge of the body 31 contacts the outer periphery of the lower side wall of the paper cup body 20. The size is to be.
[0011]
Then, the outer cylinder 30 having the above 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 in advance. The upper end portion 34 of the outer cylinder 30 is placed inside the outward curl portion 23 of the paper cup body 20 by means such as an emulsion adhesive 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 is formed by bonding and integrating the two. Depending on the usage, 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 lower side wall of the paper cup main body 20 to more securely connect the paper cup main body 20 and the outer cylinder 30. It may be. 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.
[0012]
In the heat-insulating container 10 having the above configuration, a gap 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 insulating member. Moreover, since the upper end portion 26 of the paper cup body 20 adjacent to the outward curl portion 23 is bent so as to further expand outwardly over the entire circumference, voids are formed at a certain interval from below to above. Therefore, when, for example, 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 that is normally gripped in this kind of container. 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 protruding portions 25 protruding 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 protruding portions 25. As it rises, it also serves as a support so that the trunk 31 of the outer cylinder 30 does not bend inward, so that when held by hand, the gap between the trunk 21 of the paper cup body 20 and the trunk 31 of the outer cylinder 30 Is prevented from becoming narrow.
[0013]
FIG. 3 shows another example of the heat-insulating container according to the present invention, in which the left half and the right half are schematic configuration diagrams showing a side view and a cross-sectional view, respectively. 1 and the outer cylinder 30 having a shape different from that shown in FIG.
[0014]
The outer cylinder 30 used in this example has, in addition to the configuration of the outer cylinder 30 in FIG. 1, a concave projection 33 that is depressed inward near the upper part of the body in the circumferential direction. The inner surface of the concave projection 33 contacts or slightly separates 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 at the lower opening edge of the body 31 is formed on the lower side wall of the paper cup body 20. It is sized to contact the outer circumference. Further, as shown in an enlarged manner in FIG. 4, 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 23 of the paper cup body 20. It is sized to come into contact with the inside. Note that the bending of the upper end portion 34 is not limited to the tapered shape, and may be bent in a curved state as shown in FIG.
[0015]
In the outer cylinder 30 as described above, the concave projections 33 are formed simultaneously when a blank is punched from a paperboard by a punching machine, but the taper or bending of the upper end portion 34 is performed using a mandrel 40 having a structure as shown in FIG. Attached. The mandrel 40 is used when the fan-shaped blank is wound around to form the inward curl portion 32. At the same time when the curl is formed, the upper end portion 34 is tapered or the upper end portion 34 is curved. State. That is, as shown in FIG. 6 and FIG. 7 which is a partially enlarged view thereof, the mandrel 40 has a diagonal groove 41 having a width of 1 mm, a depth of about 2 mm and an angle of 20 to 30 degrees on the maximum diameter side. Is provided over the entire circumference, and a relief portion 42 is provided so that the concave projection 33 is not crushed when the blank is wound. 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. The inward curl portion 32 is formed in the two 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 inwardly bent inward over the entire circumference. Alternatively, by appropriately setting the shape of the groove 41 and the pushing force into the groove 41, the upper end portion 34 can be formed in a curved shape.
[0016]
Then, the outer cylinder 30 having the above 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 in advance. The upper end portion 34 of the outer cylinder 30 is placed inside the outward curl portion 23 of the paper cup body 20 by means such as an emulsion adhesive 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. 3 is formed by bonding and integrating the two. 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. Depending on the usage, 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 lower side wall of the paper cup main body 20 to more securely connect the paper cup main body 20 and the outer cylinder 30. It may be. 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.
[0017]
In the heat-insulating container 10 having the above configuration, a gap 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 insulating member. In addition, since the concave projections 33 that are depressed inward are provided near the upper part of the body of the outer cylinder 30, gaps are formed at a certain interval from below to the concave projections 33. Therefore, when, for example, 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 that is normally gripped in this kind of container. Even if you grab and hold it, it will not get hot. Also in this example, since the reinforcing ribs formed of the circumferentially protruding portions 25 protruding outwardly are formed on the body portion 21 of the paper cup body 20, the strength of the paper cup body 20 is increased by the protruding portions 25. Rises, and 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 increased. The gap is prevented from narrowing.
[0018]
FIG. 9 shows still another example of the heat insulating container according to the present invention, in which the left half and the right half are schematic configuration diagrams showing a side view and a cross-sectional view, respectively. 3 is configured by combining the same paper cup main body 20 as shown in FIG. 3 and an outer cylinder 30 having a shape different from that shown in FIG.
[0019]
The outer cylinder 30 used in this example is the same as the outer cylinder 30 shown in FIG. 3 in that a concave projection 33 depressed inward is provided in the vicinity of the upper part of the outer cylinder in the circumferential direction. It has not been bent in the closing direction and remains straight. When using the outer cylinder 30 provided with the concave projection 33 near the upper part of the body, since this portion protrudes inward, the upper end portion 34 may not contact the inside of the outward curl portion 23 in the paper cup body 20. However, when the outward bending of the upper end portion 26 of the paper cup main body 20 is large, or when the inward dent of the concave portion 33 of the outer cylinder 30 is small, the upper end portion 34 of the outer cylinder 30 is It may be straight.
[0020]
FIG. 10 shows a modification of the heat insulating container shown in FIG. 3, and is a schematic configuration diagram showing a left half and a right half in a side view and a cross-sectional view, respectively. The heat insulating container 10 shown in FIG. 10 has substantially the same configuration as that shown in FIG. 3, but is embossed so that the characters or patterns to be printed form a raised portion 35 outward. A different point is that the outer cylinder 30 is formed of a paperboard made of the following. 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 exhibits the same heat-insulating effect as the heat-insulating container 10 shown in FIG. 3, but the heat-insulating effect is particularly large in the raised portion 35 because the gap is wide.
[0021]
FIG. 11 shows another modification of the heat insulating container shown in FIG. 3, 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. 3, 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 shown in FIG. 3. However, in addition to the heat-insulating effect provided by the gap between the paper cup body 20 and the outer tube 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 the example of FIG. 11, the embossed pattern is formed over the entire surface of the body portion of the outer cylinder. However, a part in which the embossed pattern is not formed may be left partially. For example, a band may be left above and below the trunk in consideration of an area held by the hand, or a name part may be left in a pattern in consideration of the design.
[0022]
FIG. 12 shows a further modified example of the heat insulating container shown in FIG. 3, 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. 3, but performs a fine embossing process on almost 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. The heat-insulating container 10 having such a structure exhibits the same heat-insulating effect as the heat-insulating container 10 shown in FIG. The heat insulating effect due to the fine irregularities is also added, and the heat insulating effect as a whole is further improved. In the example of FIG. 12, 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.
[0023]
Each of the heat-insulating containers shown in FIGS. 10 to 12, similarly to the heat-insulating container 10 of FIG. 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 main body 20 so as to abut or bite the inside of the outward curl portion 23 of the main body 20. As a result, the upper end portion 34 of the outer cylinder 30 is adhered to the inside of the outward curl portion 23 of the paper cup body 20, and the two are integrated to be assembled. 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.
[0024]
In each of the above-described examples, a narrow ridge 24 that protrudes inward at a position close to the upper side of the body 21 of the paper cup body 20 in the circumferential direction is used as an injection reference line as a guide when pouring hot water. Although formed, the ridges 24 may protrude outward. In any case, it is preferable that the position of the adhesive for bonding be higher than the injection reference line.
[0025]
When the concave protrusion 33 is provided near the upper part of the body of the outer cylinder 30, the concave protrusion 33 may be formed in a belt-like continuous state over the entire circumference except for a joint of the body 31, You may make it provide in a continuous state. When the projections are provided discontinuously, 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.
[0026]
【The invention's effect】
The heat-insulating container of the present invention comprises an upwardly extending paper cup body having an outward curl portion at an upper opening edge, and an upwardly extending paper outer portion having both an upper and lower opening and an inward curl portion at a lower opening edge. consists of a cylinder, the outer cylinder has a taper skirt spread slightly from the body of the paper cup body thereof barrel, the upper end portion adjacent to the outwardly curled portion of the paper cup body Waso is all around It is bent obliquely with a different taper from the taper of the body so that it further expands outward , that is , it expands 0.1 to 2.0 mm in the diameter direction in addition to the circumference of the opening. Put the tip of the upper end of the outer cylinder on the inside of the outward curl part of the paper cup body so that the tip of the outer cylinder touches or bites in, and adheres to the paper cup body with at least one of the upper end part and the inward curl part of the outer cylinder In this case, a gap is formed between the paper cup body and the outer cylinder, so that there is a certain amount of insulation gap over a wide range from the lower part to the upper part of the body. Since it is formed at intervals, the heat of the contents is hardly transmitted even if any part of the body is held by hand, which is excellent in heat insulation. Then, when assembling the paper cup body and the outer cylinder, the upper end portion of the paper cup body extends outward, and the upper end of the outer cylinder abuts or bites into the outward curl portion of the paper cup body. Since the collision with the lower side is prevented, the outer cylinder can be smoothly inserted into the paper cup main body, and the appearance does not deteriorate.
[0027]
Further, by forming the outer cylinder with a concave projection inwardly recessed 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, and In this case, the concave projection serves as a support and prevents the gap from being narrowed, so that the heat insulating effect is further improved.
[0028]
In addition, by forming the outer cylinder with embossed paperboard so that the characters and patterns to be printed form the raised parts to the outside, the characters and patterns to be printed on the surface of the outer cylinder are Since the protruding state is obtained, the heat insulating effect is improved, and a design excellent in terms of design, in which characters and patterns are emphasized by the unevenness, is provided.
[0029]
In addition, by forming the outer cylinder with paperboard that has been subjected to fine embossing over substantially the entire outer surface, the outer cylinder has irregularities due to embossing on the surface, so it is easy to hold by hand It is difficult to transmit heat to the hand, and it is possible to obtain a product having a design that has not been provided in the past due to the pattern of the unevenness.
[Brief description of the drawings]
FIG. 1 shows an example of a heat insulating container according to the present invention, in which a left half and a right half are a schematic configuration diagram showing a side view and a sectional view, respectively.
FIG. 2 is an explanatory view showing a mode of bending an upper end portion of a paper cup main body constituting the heat insulating container shown in FIG. 1;
FIG. 3 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.
FIG. 4 is an enlarged explanatory view showing an upper right part of an outer cylinder constituting the heat insulating container shown in FIG. 3;
FIG. 5 is a partially enlarged view showing a modified example of the outer cylinder shown in FIG.
FIG. 6 is a side view of a mandrel used to make the outer cylinder of the heat insulating container shown in FIG.
7 is an enlarged sectional view of a portion A in FIG.
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 shows still another example of the heat insulating container according to the present invention, in which a left half and a right half are schematic configuration diagrams showing a side view and a cross-sectional view, respectively.
10 shows a modification of the heat insulating container shown in FIG. 3, and is a schematic configuration diagram showing a left half and a right half in a side view and a sectional view, respectively.
11 shows another modification of the heat-insulating container shown in FIG. 3, and is a schematic configuration diagram showing a left half and a right half in a side view and a cross-sectional view, respectively.
FIG. 12 is a schematic configuration diagram showing still another modified example of the heat insulating container shown in FIG. 3, 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 26 Upper end part 30 Outer cylinder 31 Body part 32 Inward curl part 33 Concave projection 34 Upper end part 35 Embossed part 40 Mandrel 41 Groove 42 Escape part

Claims (8)

And expansion of the paper cup body above having an outward curled portion upwardly opening edge, consists of a outer tube over steel spreading of paper with inwardly curled portion downwardly opening edge is open upwardly and downwardly both outer cylinder as has body portion has a taper skirt spread slightly from the body of the paper cup body, as further spread outwardly upper end portion adjacent to the outwardly curled portion of the paper cup body Waso is over the entire circumference, That is, in addition to the circumference of the opening, it is obliquely bent with a taper different from the taper of the body so as to expand in the diameter direction by 0.1 to 2.0 mm . The leading end is brought into contact with or cut into the inside of the outward curl portion of the paper cup body, and the upper end portion and the inward curl portion of the outer cylinder are adhered to the paper cup body to integrate them. Formed by heat insulation container, wherein a gap is formed between the paper cup body and the outer cylinder. The heat-insulating container according to claim 1, wherein the upper end portion of the outer cylinder is bent in a direction to close inward over the entire circumference. The heat-insulating container according to claim 1 or 2, wherein a concave projection that is recessed inward is provided near the upper part of the body of the outer cylinder in a circumferential direction. The heat insulating container according to claim 3, wherein the circumferential projection provided near the upper portion of the body of the outer cylinder is discontinuous. The heat-insulating container according to any one of claims 1 to 4, wherein an injection reference line is provided on a body portion of the paper cup main body, the injection reference line including a circumferential ridge protruding on an inner surface side or an outer surface side. The heat-insulating container according to any one of claims 1 to 5, wherein a reinforcing rib comprising a circumferentially projecting portion projecting to the outer surface side is formed on a body portion of the paper cup body. The heat-insulating container according to any one of claims 1 to 6, wherein a printed character or pattern portion of the outer cylinder forms an outwardly protruding portion. The heat-insulating container according to any one of claims 1 to 7, wherein fine embossing is performed on substantially the entire outer surface of the outer cylinder.

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