JP5199402B2 - Paper container - Google Patents

Description

The present invention relates to a paper container.

In the past, fluid containers of food were mainly limited to bottles and cans. When using the contents, in the case of a bottle, open the stopper (cork, crown, etc.) that closes the hole with a bottle opener, or in the case of a can, make a hole in the top of the can The contents were released. Later, a spout with a pull top appeared, and it became possible to open it without using special equipment. When the contents are not used up after opening, it is often required to store in a cool and dark place such as a refrigerator for the sake of food hygiene. As a result, even if the remaining amount becomes very small, there is no change in the size of the container body, so that a situation occurs in which an almost empty container must be continuously stored in a refrigerator or the like. On the other hand, with the advent of squeezed stretched containers, it has become possible to reduce the volume of the container body of gel foods such as ketchup and mayonnaise, depending on the remaining amount. However, stretch-drawn containers are generally not self-supporting and are often stored in a lying state, and even if the volume of the container body is reduced depending on the amount used, storage is lacking in stability if another is placed on it. The storage capacity of the storage cannot be expected. In addition, in order to maintain the self-supporting structure of the self-supporting structure, the structure near the bottom of the container is generally hard and the structure near the bottom is not easily changed even when the volume is reduced. As long as they were independent, there was no change in the storage area. Since then, with the advent of paper containers and plastic bottles that have both flexibility and independence, many proposals regarding volume reduction of container bodies have been introduced (Patent Documents 1 to 29). However, most of them are premised on volume reduction upon disposal of the contents after use (Patent Documents 1-8, 10-15, 17, 18, 20-27). Among these, those having a structure capable of gradually reducing the volume of the container body as the contents are reduced are included (Patent Documents 1, 3 to 5, 8, 19, and 24). However, the bellows structure of Patent Documents 1, 3 and 8 is difficult to realize in a paper container. In addition, since Patent Documents 4 and 5 have a structure in which the container side surface is recessed toward the center of the container as the contents are extracted, the contribution to the decrease in the container bottom and height is insufficient. There is little contribution to improvement. Furthermore, Patent Document 24 can expect a decrease in the bottom surface of the container with a decrease in contents, but the height of the container does not change. On the other hand, what presupposes volume reduction accompanying the reduction in contents has a squeezed structure (Patent Documents 9, 16, 19, 28, 29). Patent Document 9 is a squeezed container by a method in which the lower part of the container is folded inward according to a fold line symmetrical about a rotating body thermoplastic resin container, but it is difficult to realize with a paper container. Similarly, Patent Document 16 is a cylinder / piston type container, which cannot be realized in a paper container. Since Patent Documents 19, 28 and 29 have a structure in which the side surface of the container is recessed toward the center of the container as the contents are extracted, the contribution to the decrease in the bottom surface and height of the container is insufficient. There is little contribution to improvement.

Registered Utility Model No. 3011011 JP-A-10-157721 Japanese Patent Laid-Open No. 10-194289 Japanese Patent Laid-Open No. 11-236025 JP 2002-282335 A JP 2006-248614 A JP-A-6-247448 JP-A-6-301189 JP 7-2261 A JP 7-52934 A JP-A-8-72931 JP-A-8-244748 Japanese Patent Laid-Open No. 9-295380 Japanese Patent Laid-Open No. 10-45164 Japanese Patent Laid-Open No. 10-230923 JP-A-11-91784 JP-A-11-180431 Japanese Patent Laid-Open No. 11-240531 JP 2002-37271 A JP 2003-160118 A JP 2004-18110 A JP 2005-67691 A JP 2005-170462 A JP-A-2005-231656 JP 2006-123936 A JP 2006-206057 A JP 2007-119093 JP 2008-56326 A JP 2008-120402 A

An object of the present invention is to provide a paper container that can be reduced in the height direction as the contents are reduced.

The present invention is as follows. A paper container which is capable of being reduced in the height direction by providing a crease guide line on a side surface forming the height direction of the paper container and folding the crease guide line in a mountain and / or valley fold. . In a preferred embodiment of the present invention, a crease guide line is provided on a side surface forming the height direction of the paper container, the crease guide line is mountain-folded and / or valley-folded, and mountain-folded and / or valley-folded. In this case, the portion protruding from the side surface portion is bent in the direction of the paper container main body, and the state is maintained, so that it is possible to reduce in the height direction, and a path for pouring out the contents of the paper container is ensured in the reduced state. A paper container is provided.

ADVANTAGE OF THE INVENTION According to this invention, the paper container which can be shrunk | reduced in a height direction with the content reduction is provided.

It is a perspective view of one embodiment of the paper container of the present invention. It is the figure which expand | deployed the paper container shown in FIG. It is a perspective view for demonstrating the process reduced in a height direction by carrying out the mountain fold and / or valley fold of a crease | fold guide line with the reduction | decrease of the content inside a paper container. It is a perspective view for demonstrating the process of another form which is reduced in a height direction by carrying out the mountain fold and / or valley fold of a crease guide line with the reduction | decrease of the content inside a paper container.

Hereinafter, the present invention will be further described with reference to the drawings. FIG. 1 is a perspective view of an embodiment of the paper container of the present invention. A paper container 10 shown in FIG. 1 includes a side surface portion 20 formed by folding a mount into a rectangular tube shape, a bottom surface portion 30 formed by welding and forming one side in the longitudinal direction of the side surface portion, and the other side. A gable roof-shaped container top portion 40 is provided which is provided and filled with the contents, and is welded and sealed. The paper container 10 of the present invention is provided with a crease guide line 100 on the side surface portion 20 forming the height direction of the paper container 10, and the crease guide line 100 is fold-folded (dashed line) and / or valley-folded (dotted line). Thus, it is possible to reduce in the height direction.

FIG. 2 is a developed view of the paper container shown in FIG. When the paper container 10 is unfolded, the paper container 10 has a substantially rectangular shape as shown in FIG. 2, and the crease guide line 100 is provided so as to intersect with the portion forming the side surface portion 20 or in the horizontal direction. The crease guide line 100 can be formed by providing a minute groove in a line shape or a dot shape in a paper container manufacturing process, or forcibly bending it using a press or the like.

FIG. 3 is a perspective view for explaining a process in which the crease guide line is reduced in the height direction by fold-folding and / or valley-folding as the contents inside the paper container decrease. First, in FIG. 3A, for example, when the content inside the paper container is reduced by about 50%, the valley folding of the side surface portions 200A and 200B facing each other along the crease guide line 100 is started. In addition, valley folding here means that the folded part goes to the inner side direction of the paper container 10. Along with this, the other side surface portions 200C and 200D are started to fold. In addition, the mountain fold here means that the folded portion is directed toward the outside of the paper container 10. Subsequently, in FIG. 3B, when the mountain fold and the valley fold are completed, the protruding portion M is formed toward the outer side of the paper container 10 and the height direction of the paper container 10 is reduced. When this protrusion M adversely affects, for example, the storage space in the refrigerator, the protrusion M is folded upward as shown in FIG. 3C, and the tip of the protrusion M is directed toward the paper container 10. The above problem can be solved by bending it slightly (FIG. 3 (d)) and inserting the tip of the protrusion M into the recess 401 in the container top 40 of the paper container 10 (FIG. 3 (e)). The dent 401 is formed by folding the upper portions of two opposing surfaces of the side surface portion 20 inward.

FIG. 4 is a perspective view for explaining a process of another form in which the crease guide line is reduced in the height direction by folding and / or valley-folding the crease guide line as the contents inside the paper container decrease. It is. First, in FIG. 4A, for example, when the content inside the paper container is reduced by about 50%, the side folds 200 </ b> A and 200 </ b> B that face each other along the crease guide line 100 are started. In addition, valley folding here means that the folded part goes to the inner side direction of the paper container 10. Along with this, the other side surface portions 200C and 200D are started to fold. In addition, the mountain fold here means that the folded portion is directed toward the outside of the paper container 10. Subsequently, in FIG. 4B, when the mountain fold and the valley fold are completed, the protruding portion M is formed toward the outer side of the paper container 10, and the height direction of the paper container 10 is reduced. When the protruding portion M adversely affects, for example, the storage space in the refrigerator, the protruding portion M is bent downward as shown in FIG. (FIG. 4 (d)), and if the ring 50 prepared separately to maintain the state is fitted into the side surface portion 20 of the container 10 so as to press the protruding portion M that is in close contact with the side surface portion 20, The above problem is solved (FIG. 4E). In this form, the present invention provides an assembly of paper container 10 and ring 50. In addition, when this form is used, a separate ring is required, which provides various advantages as described below. First, when the container 10 is maintained in a reduced state by inserting the protrusion M into the recess 401 as shown in FIG. 3, the position of the protrusion M is limited to a position directly below the recess 401. Therefore, when the liquid inside the paper container 10 is poured out in the state shown in FIG. 3 (e), the side surfaces 200A and 200B that are valley-folded form a weir in the container 10, so that the container is more than normal. Must be largely inclined, and when pouring out to the end, the top and bottom of the container must be reversed almost completely. On the other hand, when a ring is used, the protrusion part M is not limited to the side part 200C and 200D direction shown in FIG. 4, but can be formed in the side part 200A and 200B direction. In this form, it becomes possible to form the protrusions M in the direction of the side surfaces 200A and 200B by valley-folding the side surfaces 200C and 200D. In this case, when the liquid is poured out, the outflow path is narrowed by the side portions 200C and 200D that are valley-folded, but the liquid pouring from the spout that is seen when the side portions 200A and 200B are valley-folded is directly performed. Since no weir is formed, it can be poured smoothly. However, since the liquid outflow path is slightly narrowed before the spout in this form, even if the container is accidentally tilted too much when pouring the contents, the contents flow into the spout at a stretch, suppressing the momentum to some extent Can be expected. Further, when a ring is used, since it is not necessary to insert the protrusion M into the recess 401, the half-side weld of the gable roof-shaped container top 40 is peeled off and the recess 401 on one side is pulled out to form a spout. It can also be applied to a type of paper container.

In view of practical use, it is preferable that the width of the outflow path narrowed by the reduction of the paper container is secured to 2 mm or more in any of the forms of FIGS. That is, for example, in the form of FIGS. 3 and 4, when the side surface portions 200 </ b> A and 200 </ b> B are valley-folded, the width of the liquid outflow path formed over the entire width direction of the container is preferably 2 mm or more. The wider the outflow path, the more smoothly the contents can be poured, while the reduced width of the paper container is reduced. In view of both, the width of the outflow path is preferably 7 to 27 mm, and most preferably 12 to 22 mm.

The ring may be fitted in advance around the paper container, or may be attached separately from the paper container body. Furthermore, when the beverage containing paper containers is sold after being film-wrapped, a part of the film package can be configured as a ring. For example, a cut along the horizontal plane is made in two places above and below the part of the film packaging that is in contact with the side surface of the paper container. Left around the paper container.

In the above embodiment, the paper container 10 can be reduced in two steps in the height direction by folding the side surface 20 of the paper container 10 along the crease guide line 100 in a mountain fold and a valley fold. Although the process of reducing the stage is shown, it is needless to say that the second stage can be reduced by the same process, and the paper container 10 can be reduced to three or more stages by adding a similar crease guide line. This makes it possible to reduce the size of the paper container 10 more finely according to the degree of content reduction. Further, in the above embodiment, an example in which the side surface portion 20 of the paper container 10 is mountain-folded and valley-folded along the crease guide line 100 has been shown. However, the present invention is not limited to this, and is all mountain-folded or valley-folded. The paper container 10 may be reduced in the height direction. In the above embodiment, a beverage paper container having a gable roof shape has been described as an example, but the present invention is not limited to this, and of course a paper container having a generally rectangular parallelepiped shape without a gable roof shape. The present invention can be applied to any of so-called tetrapacks having a substantially triangular pyramid shape and other shape paper containers.

DESCRIPTION OF SYMBOLS 10 Paper container, 20 side part, 30 bottom part, 40 container top part, 50 ring, 100 crease guide line, 200A, B, C, D side part, 401 dent of container top part, M protrusion part.

Claims (1)

A paper container that can be reduced in the height direction by providing a crease guide line on a side surface forming a height direction of the paper container, and folding the crease guide line in a mountain and a valley. The paper container, wherein the line is provided so that the protruding portion is formed only on a pair of opposing side surface portions that form the height direction of the paper container.

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