JP2001301740A - Simple container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple container improving the strength in the switch direction at a circumferential edge portion of the simple container, in particular, an upper opening and improving the shape holding property. SOLUTION: The circumferential edge portion of the upper opening 17 of a barrel portion 10 is returned outwardly to form a returned portion 18, and a part of the returned portion 18 is adhered to an outer surface outside the opening edge portion at an adhesion portion 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple container, and more particularly, to a simple container having an open upper portion.

[0002]

2. Description of the Related Art As containers for supplying various foods and beverages, simple containers mainly made of paper are widely used. As a disposable container, a simple container made of a paper cup is used.

[0003] A simple container of this kind is formed by winding a fan-shaped base paper to form a cup-shaped body, and combining a bottom plate made of a separate member with the bottom. Alternatively, a circular paperboard is drawn and formed into a cup-like shape.

[0004]

In such a simple container, if the strength of the upper portion, particularly the opening edge portion, is weak, the property of maintaining the shape of the container, that is, the shape-retaining property is impaired. In addition, when the cover is mounted so that the upper opening is closed by the cover, there is a problem that it is difficult to fit the cover. Therefore, in order to improve the strength of the upper part of the container, a material is devised, or a rim or a curl portion is provided at the edge of the opening.

By providing a rim or curl at the opening edge, the strength of the upper part of the container, particularly the opening edge, is improved. In order to further improve the strength, it is preferable to bond at least a part of the rim or the curled portion.
However, an appropriate shape for effectively and simply bonding only a part of the rim or the curled portion has not been proposed.
In the case of a simple container made of paper laminated with a thermoplastic resin, this thermoplastic resin can be used instead of the adhesive, but the thermoplastic resin is easily welded to container processing tools. In some cases, processing may be hindered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a simple container having a sufficient strength at the upper part of the container, particularly at the opening edge, thereby having high shape retention. The purpose is to provide.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple container having an opening at an upper portion, wherein the peripheral portion of the upper opening is folded outward, and at least a part of the folded portion is formed at the opening edge. The present invention relates to a simple container characterized by being adhered to the outer surface of the outside.

Here, the main material is made of paper, and a polymer film is bonded to at least one surface of the paper, and the surface to which the polymer film is bonded when the periphery of the opening is folded back. May be brought into contact with each other, and the folded portion may be bonded by thermal welding of the polymer film. Further, instead of heat welding the polymer film, the polymer film may be adhered with an adhesive or a glue. In addition, the adhesive may be bonded on the opening edge side from the tip of the folded portion, and the tip side of the folded portion may be separated from the outer surface outside the opening edge. A space may be formed between the folded portion and the outer surface outside the opening edge. Such a simple container may be an assembled container in which the bottom plate is formed of a separate member, or a squeezed container in which the bottom is integrated.

[0009]

According to one aspect of the present invention, the periphery of the upper opening is folded outward, and at least a part of the folded portion is adhered to the outer surface outside the opening edge. Therefore, the folded portion is adhered and fixed, whereby the deformation of the folded portion is prevented, and the strength of the upper portion, particularly, the edge of the opening is improved. Therefore, a simple container having high shape retention is provided by such strength of the opening edge.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. First, a first embodiment will be described with reference to FIGS. The simple container has an inverted truncated cone-shaped body portion 10 formed by winding fan-shaped base paper. In addition, it is good also as an inverted polygon frustum shape using an irregular fan-shaped base paper.
The bottom opening of the body 10 is closed by the bottom plate 11. As shown in FIG. 2, the bottom plate 11 is bent downward at its outer peripheral portion so that the peripheral wall portion 1 is formed.
2, the peripheral wall portion 12 is sandwiched between the lower end of the body portion 10 and the bent portion 13, thereby forming the bottom plate 1
1 is connected to the bottom of the body 10.

In such a cup-shaped simple container, the periphery of the upper opening 17 is folded outward to form the folded portion 1.
8 are formed. As shown in FIG. 3, a space 19 is provided between the inside of the folded portion 18 and the edge of the opening.
7 is formed along the periphery. Moreover, the tip 20 of the folded portion 18 is separated from the outer surface outside the opening edge. The folded portion 18 is bonded to the outer surface of the body 10 at the bonding portion 21 on the opening edge side of the tip portion 20.

Such a simple container is a simple container mainly made of paper, in which laminated films 26 and 27 are bonded to both surfaces of a paper 25 as shown in FIG. Here, the laminate films 26 and 27 are each selected from a thermoplastic resin having an appropriate melting point. In particular, as shown in FIG. 3, when the folded portion 18 is folded outward, the laminated films 27 joined to the outer surface of the body portion 10 come into contact with each other, and the heat of the laminated film 27 becomes large. The bonding portion 21 is formed by welding.

As described above, the simple container according to the present embodiment has a laminate film 2 on both sides of a paper 25 as shown in FIG.
It is composed of a base paper having a three-layer structure in which layers 6 and 27 are laminated, and the bonding portion 21 is formed by heat welding of the outer laminate film 27. Here, the heat welding by the laminate film 27 is performed by pressing after hot air or frame heating. Instead of such heat welding, hot plate press bonding, press bonding after heating by a combination of hot air and a heater, or bonding by ultrasonic welding may be performed.

In the case of heat welding using the laminated film 27, the laminated film 26 located so as to be exposed to the outside of the folded portion 18 when it is folded by heat at the time of performing such heat welding is damaged. there is a possibility. Therefore, by selecting a thermoplastic resin having a higher melting point for the laminate film 26 than for the laminate film 27 and selecting an appropriate heating temperature, the laminate film 26 on the outer surface can be melted without dissolving the laminate film 26 on the other surface. Bonded part 2 by film 27
1 can be formed favorably.

Here, as shown in FIG. 3, the tip portion 20 of the folded portion 18 is separated from the outer surface of the opening edge. This is at the position corresponding to the tip 20,
This is to prevent the laminated film 27 on the outer surface of the No. 0 from being damaged at the time of heat welding or pressure bonding. That is, the size of the pressure-bonded body is set to a size that effectively presses the bonding portion 21 and is limited to a size that does not press the tip portion 20. Therefore, the tip 2
The outer surface of the torso 10 is prevented from being damaged inside the inside of the cylinder. In the case where the bonding is performed by an appropriate method such as ultrasonic waves, the bonding may be performed to the distal end portion 20.

In such a simple container, since the peripheral portion of the upper opening 17 of the body 10 is turned outward and the portion of the adhesive portion 21 is heat-welded, the processing of the folded portion 18 is simple. Molding can be performed, thereby preventing an increase in cost of the simple container.
Moreover, since the folded portion 18 is adhered to the outer surface outside the opening edge at the bonding portion 21, such a folded portion 18 can increase the strength in the circumferential direction, particularly at the opening edge portion. Will be possible. Therefore, the shape retention of the container is improved, and the held portion does not deform inward when the container is held. In addition, when the cover is attached, the tightness of fitting between the cover and the opening edge of the container is improved. In addition, the folded portion 18 having the adhesive portion 21 increases the strength, particularly at the upper portion of the container, and improves the shape retention, so that the thickness of the material base paper can be reduced, thereby reducing the cost. Will be planned.

Next, a second embodiment will be described with reference to FIGS. This embodiment differs from the first embodiment in the structure of a bottom plate 11 for closing a bottom opening of a body 10. That is, a peripheral wall portion 12 bent upward is formed on the outer peripheral side of the bottom plate 11, and such a peripheral wall portion 12 is joined to the inner peripheral surface of the body portion 10 so that the bottom opening is closed. ing.

Further, in such a simple container, the upper end portion of a folded portion 18 formed by folding the peripheral portion of the upper opening 17 outward has a substantially arc shape as shown in FIG.
A space 19 is formed inside. Especially the folded part 18
By making the cross-sectional shape of a circular arc, the strength of the folded portion 18 can be increased as compared with the first embodiment shown in FIG. 3, and the shape retention can be further improved. Further, since the distal end portion 20 is largely separated from the outer peripheral side of the trunk portion 10, the trunk portion 1 inside the distal end portion 20 is similar to the above embodiment.
0 is prevented from being damaged. In the case of bonding by a method with less damage such as ultrasonic waves, the tip portion 20 may be brought close to or in contact with the outer peripheral surface of the body portion 10.

Next, still another embodiment will be described with reference to FIGS. 6 and 7. FIG. In this embodiment, a peripheral wall portion 12 formed on an outer peripheral side of a bottom plate 11 that closes a bottom opening of the body portion 10 is joined to an outer surface on a lower end side of the body portion 10.

Here, the entire shape of the folded portion 18 formed by folding the peripheral portion of the upper opening 17 outward is substantially the same as that of the second embodiment, and in particular, as shown in FIG. The escape amount of the distal end portion 20 to the outer peripheral side is reduced. That is, by changing the jig for pressure bonding at the time of heat welding for forming the bonding portion 21, the amount of the distal end portion 20 released to the outer peripheral side is reduced.

Next, still another embodiment will be described with reference to FIGS. This embodiment relates to a drawing container in which the container itself is formed from a single substantially circular paperboard, in which the bottom plate 11 is formed by drawing a single paperboard continuous with the body 10.

Then, by turning the peripheral portion of the upper opening 17 outward, a shape having an arc-shaped cross section in two steps is formed as shown in FIG. The folded portion 18 is bonded to the outer surface of the body 10 by bonding the bonding portion 21 particularly at an intermediate position in the height direction of the folded portion 18 formed in two steps.

Generally, in the case of a drawing container made of a single circular paperboard, since the body portion is squeezed, the strength of the body portion in the circumferential direction is weak, and the contents are held. Sometimes the container may open and deform under the weight of the contents. In other words, when the body opens due to the weight of the contents,
This can cause the contents to spill or leak. However, according to the configuration shown in FIGS. 8 and 9, the folded portion 18 formed by folding the opening edge outward.
Are bonded at the bonding portion 21, and such bonding portion 21 gives circumferential strength to the container, and therefore, even when the container is put with the contents therein,
The container does not deform openly, which prevents the contents from spilling.

Next, still another embodiment will be described with reference to FIGS. In this embodiment, the body 10 is formed by squeezing a part on the outer peripheral side by using a circular paperboard. Accordingly, the bottom plate 11 and the body 10 are formed of a single continuous paperboard. Moreover, the folded portion 18 is formed by folding the periphery of the upper opening 17 outward. Here, as shown in FIG. 11 in particular, the folded portion 18 substantially overlaps the upper end side of the body portion 10 and the portion outside the opening edge in the entire length in the height direction. Moreover, the folded portion 18 is bonded to the outer surface of the body 10 by the bonding portion 21 at an intermediate position in the height direction of the folded portion 18. Therefore, according to such a squeezing container, the folded portion 18 formed by folding the opening edge outward.
This provides the container with shape retention and prevents the container from being deformed when holding the contents.

Next, still another embodiment will be described with reference to FIGS. The simple container of this embodiment is a drawn container formed by drawing a circular paperboard,
The bottom plate 11 and the body 10 are formed of a single continuous paperboard, and have a substantially dish-like shape as shown in FIG.

Moreover, the upper opening 17 of such a simple container is used.
Is folded outward to form a folded portion 18. Here, the folded portion 18 is bonded to the outer surface outside the opening edge at the bonding portion 21 at an intermediate position in the height direction. In addition, the tip portion 20 which is the lower end portion of such a folded portion 18 is bent outward,
It is spaced from the outer surface of the body 10.

Therefore, even in such a container, the body 1
The 0-side folded portion 18 gives the container strength in the circumferential direction, so that the container has high shape retention. Therefore, even if the contents are held and the container is held, the container is prevented from being opened or deformed due to the weight of the contents. Further, the distal end portion 20 bent toward the outer peripheral side of the folded portion 18 prevents the laminate film 27 from being damaged particularly at the inner portion thereof, and does not impair the appearance.

Next, still another embodiment will be described with reference to FIGS.
6 will be described. In this embodiment, a flat tray-like container is formed by using a substantially rectangular paperboard base paper. That is, by narrowing the peripheral edge of the rectangular base paper, the trunk 10 is formed by the peripheral edge, and the upper end side of such a trunk 10 is folded outward to form a body 2.
It has a heavy flange structure. The folded portion 18 has its upper surface adhered to the flat flange-like portion above the folded portion by an adhesive 21 as shown in FIG. 16A. Here, as shown in FIG. 16B, the distal end portion 20 of the folded portion 18 may be bent further downward.

According to such a structure, a simple container having a shape retaining property, that is, a function of maintaining the original shape, is further enhanced by the double flange structure of the peripheral portion of the tray-shaped container made of paper. Will be provided.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, the shape of the container is not limited to the shape of the above-described embodiment, and can be widely applied to various other types of simple containers. Further, in the above embodiment, the folded portion 18 is heat-welded by heat-sealing the laminate film 27. However, instead of such heat-sealing, a hot-melt type, another adhesive or a glue is used. Bonding can be performed.

In the above embodiment, as shown in FIG. 3, FIG. 5, FIG. 7, FIG. 9, FIG. 11, FIG.
Is used, but when the laminate films 26 and 27 are not used as a means for welding, the container may be formed of a single layer of base paper made of paper only. Alternatively, the container may be formed of paper having a laminate film bonded to only one surface. In addition, it is also possible to form the container using base paper having a configuration other than the above three layers.

Although the main embodiment described above relates to a cup-shaped or dish-shaped circular container, the present invention is not necessarily limited to such a circular container. That is, for example, using a rectangular base paper,
Such a rectangular base paper may be drawn to form a rectangular drawn container. Alternatively, the present invention can be applied to a tray-shaped container.

[0033]

As described above, according to the present invention, in a simple container having an upper opening, the peripheral portion of the upper opening is folded outward and at least a part of the folded portion is formed outside the opening edge. Adhered on the outer surface of the

Therefore, according to such a container, the peripheral portion of the upper opening is folded outward, and at least a part of the container is adhered to the outer surface outside the opening edge by the folded portion.
It is possible to give circumferential strength to the opening edge of the container and to significantly improve the shape retention of the upper portion of the container. Therefore, the container is prevented from being deformed by the weight of the contents, or when the cover is attached, the adhesion to the cover is improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a simple container according to a first embodiment.

FIG. 2 is a vertical sectional view of the simple container.

FIG. 3 is an enlarged vertical sectional view showing a structure of a folded portion.

FIG. 4 is a longitudinal sectional view of a simple container according to another embodiment.

FIG. 5 is an enlarged vertical sectional view showing a structure of a folded portion.

FIG. 6 is a longitudinal sectional view of a simple container according to still another embodiment.

FIG. 7 is an enlarged sectional view of a main part showing a structure of a folded part.

FIG. 8 is a longitudinal sectional view of a simple container according to still another embodiment.

FIG. 9 is an enlarged vertical sectional view showing a structure of a folded portion of the simple container.

FIG. 10 is a longitudinal sectional view of a simple container according to still another embodiment.

FIG. 11 is an enlarged vertical sectional view showing a structure of a folded portion of the simple container.

FIG. 12 is a longitudinal sectional view showing the structure of a simple container according to still another embodiment.

FIG. 13 is an enlarged vertical sectional view showing a structure of a folded portion.

FIG. 14 is a perspective view showing the structure of a tray-shaped simple container according to still another embodiment.

FIG. 15 is a longitudinal sectional view of the simple container.

FIG. 16 is an enlarged vertical sectional view showing a structure of a folded portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body part 11 Bottom plate 12 Peripheral wall part 13 Bending part 17 Top opening 18 Folding part 19 Space 20 Front end part 21 Adhesion part 25 Paper 26, 27 Laminate film

Claims (7)

[Claims] 1. A simple container having an opening at an upper portion, wherein a peripheral portion of the upper opening is folded outward, and at least a part of the folded portion is adhered to an outer surface outside the opening edge. A simple container characterized by the following. 2. A main material is made of paper, and a polymer film is bonded to at least one surface of the paper, and the polymer film is bonded when the periphery of the opening is folded. 2. The simple container according to claim 1, wherein the folded portions are adhered by heat welding of the polymer film. 3. The simple container according to claim 1, wherein the portion folded outside the opening edge is adhered by an adhesive or a glue. 4. The bonding device according to claim 1, wherein the adhesive is adhered on the edge of the opening from the tip of the folded portion, and the tip of the folded portion is separated from the outer surface outside the edge of the opening. The simple container according to claim 1. 5. A space is formed between the folded portion and the outer surface outside the opening edge.
The simple container according to claim 4. 6. The simple container according to claim 1, wherein the bottom plate is an assembled container made of a separate member. 7. The simple container according to claim 1, wherein the container is a squeezed container having an integral bottom.