JP6759694B2 - Goebel top type packaging container - Google Patents

Description

The present invention relates to a Goebel top type packaging container.

A Goebel-top type paper packaging container in which a sheet material containing a paper base material layer is bent into a box shape, the ends are overlapped and sealed, and the top is formed in a gable roof shape is known (patented). Reference 1).

In addition, by adding folding lines to the Goebel top type paper packaging container, it is easy for the user to fold the packaging container when disposing of the packaging container, and the paper packaging container is designed to reduce the volume of dust. It is known (see Patent Documents 2 and 3).

Japanese Unexamined Patent Publication No. 2015-85945 Jitsukaisho 56-43717 Jikkai Sho 61-137516

When folding the Goebel top type paper packaging container, when the side plate 111 of the packaging container body 102 is to be folded inside the packaging container, as shown in FIG. 9, between the pair of roof plates 106. There is a method of pushing the corner portion 120 in contact between the folded plate 108 and the side wall 111 toward the inside of the packaging container with a finger. However, the work of pushing the corners of the packaging container with a finger requires a certain amount of force, and the corners may bite into the fingers during the folding work, which may hinder the folding work.

The present invention has been made in view of such problems, and an object of the present invention is to provide a Goebel top type packaging container that can be easily folded with less burden on fingers in the folding work.

One aspect of the present invention for solving the above problems is on the boundary line between the roof plate, the folded plate folded below the roof plate, the side plate connected to the lower end of the folded plate, and the folded plate and the side plate. It is a Goebel top type packaging container including a ruled line formed in a predetermined range of the above, and the ruled line is not provided with a predetermined length at the center in the length direction of the boundary line, and the ruled line is provided on the folded plate and the side plate. A Goebel-top type packaging container in which an auxiliary ruled line formed in a predetermined range on a virtual line extending from an area not provided with a predetermined length toward the outer edge of a folded plate or a side plate is formed .

According to the present invention, it is possible to provide a Goebel top type packaging container that can be easily folded with less burden on fingers in the folding work.

Perspective view of a Goebel top type packaging container according to an embodiment of the present invention. Front view and cross-sectional view of the folded plate and the side plate according to the embodiment of the present invention. Top view of the blank according to the embodiment of the present invention Sectional drawing which shows typically the laminated structure of the sheet material which concerns on one Embodiment of this invention. The figure which shows the disassembly method of the Goebel top type packaging container which concerns on one Embodiment of this invention. The figure which shows the disassembly method of the Goebel top type packaging container which concerns on one Embodiment of this invention. The figure which shows the disassembly method of the Goebel top type packaging container which concerns on one Embodiment of this invention. The figure which shows the disassembly method of the Goebel top type packaging container which concerns on one Embodiment of this invention. Top view of the blank according to the modified example of the present invention Top view of the blank according to the modified example of the present invention Top view of the blank according to the modified example of the present invention The figure which shows the disassembly method of the Goebel top type packaging container which concerns on a prior art

(Packaging container)
FIG. 1 shows a perspective view of a Goebel top type packaging container 100 (hereinafter, simply referred to as a packaging container 100) according to an embodiment of the present invention, and FIG. 2 shows a front view and a cross-sectional view of a folded plate 108 and a side plate 111b. Is shown. In the following description, for convenience, the vertical direction when the packaging container 100 is upright is defined as vertical.

The packaging container 100 is formed by bending a blank 110, which is a processed sheet material, into a box shape, overlapping the ends thereof, and sealing the blank 110. The packaging container 100 includes a top portion 101 which is an upper portion when standing upright, a body portion 102 which is a side surface, and a bottom portion 103 which is a lower portion. The top 101 includes two roof plates 106 (106a, 106b) and a folding plate 107 and a folding plate 108 that are folded between the roof plates 106. A side plate 111a is connected to the lower end of each roof plate 106. Further, a side plate 111b is connected to the lower end of each folded plate 108. As an example, the side plates 111a and 111b are formed with a fragile portion 105 having a weakened breaking strength so as to go around the body portion 102 in the width direction, which is the left-right direction when the packaging container 100 is upright. .. The fragile portion 105 does not have to be formed.

As shown in FIG. 2, a ruled line 121 is formed on the boundary line 125 between the folded plate 108 and the side plate 111b. The ruled line 121 is not provided with a predetermined length at the center of the boundary line 125 in the length direction. In the following, the portion where the ruled line 121 is not provided with a predetermined length is referred to as a dividing portion 116 for convenience. The dividing portion 116 is preferably provided on the boundary line 125 of the two folded plates 108 and the side plate 111b, respectively, but may be provided on only one side. The ruled line 121 can be formed by a well-known technique, for example, by pressing the blank 110 from both sides with a roller or the like.

As shown in the cross-sectional view of FIG. 2, the divided portion 116 does not form a corner portion 120 having a small radius of curvature between the folded plate 108 and the side plate 111b, and the position has a gently curved arc shape.

(blank)
FIG. 3 shows a plan view of a blank 110, which is an example of a blank used as a material for the packaging container 100. The blank 110 includes roof plates 106a and 106b, folding plates 107 and folding plates 108 forming the top 101, side plates 111a and 111b forming the body 102, bottom plates 112 forming the bottom 103, and ends. It has a formed seal portion 113. A dividing portion 116 in which the ruled line 121 is not provided with a predetermined length is formed at the center in the length direction on the boundary line 125 between the folded plate 108 and the side plate 111b connected to the lower end of the folded plate 108. The fragile portions 105 are formed on the side plates 111a and 111b so as to go around the body portion 102.

The width of the divided portion 116 is preferably 7 mm or more, and may be formed over the entire width direction of the side wall portion 111b. This is because if the width of the divided portion 116 is less than 7 mm, the fingers cannot fit in the divided portion 116 when the packaging container 100 is folded, and the effect cannot be sufficiently obtained.

(Sheet material)
FIG. 4 shows a cross-sectional view schematically showing an example of the laminated structure of the sheet material 200, which is the laminated body used for the blank 110, and the structure of the fragile portion 105. The sheet material 200 is formed in the order of printing layer 208 / thermoplastic resin layer 201 / paper base material layer 202 / adhesive resin layer 203 / barrier layer 204 / adhesive layer 205 / sealant layer from the outside to the inside of the packaging container 1. Has 206.

The thermoplastic resin layer 201 can be formed on the paper base material layer 202 by extrusion lamination or the like using a low density polyethylene resin (LDPE), a linear low density polyethylene resin (LLDPE), or the like.

A print layer 208 may be provided on the outside of the thermoplastic resin layer 201 to display a pattern or product information. The print layer 208 can be formed by a method such as gravure printing or offset printing using a well-known ink. The thermoplastic resin layer 201 can be subjected to an easy-adhesion treatment such as a corona treatment to improve the adhesion to the printing layer 208. An overcoat layer may be provided on the outer side of the print layer 208 in order to improve wear resistance or surface decoration.

As the paper base material layer 202, a paperboard such as a milk carton base paper can be used. The basis weight and density can be appropriately selected depending on the capacity and design of the container. For example, those having a basis weight of 200 g / m ² or more and 500 g / m ² or less and a density of 0.6 g / cm ³ or more and 1.1 g / cm ³ or less can be used.

The adhesive resin layer 203 is a layer made of a polyolefin resin having a function of adhering the paper base material layer 202 and the base film layer 204. Specifically, high density polyethylene resin (HDPE), medium density polyethylene resin (MDPE), LDPE, LLDPE, ethylene / methacrylic acid copolymer (EMAA), ethylene / acrylic acid copolymer (EAA), ionomer, polypropylene. (PP) or the like can be used. In order to increase the adhesive strength, the surfaces of the paper base material layer 202 and the barrier layer 204 may be subjected to corona treatment, ozone treatment, anchor coating or the like. Alternatively, instead of the adhesive resin layer 203, an adhesive layer using a dry laminate adhesive or the like may be used. The thickness is preferably 10 μm or more and 60 μm or less. Sufficient adhesive strength can be obtained by setting the thickness to 10 μm or more.

The barrier layer 204 is a vapor-deposited film containing a vapor-deposited layer 204b on which a metal such as aluminum, silica, alumina or the like is vapor-deposited and a base film 204a, or a laminated film in which a metal foil 204c such as aluminum is dry-laminated on the base film 204a. Can be used. The thickness of the thin-film deposition layer 204b can be 5 nm or more and 100 nm or less, and when polyethylene terephthalate is used as the base film 204a, the thickness can be 6 μm or more and 25 μm or less.

As the barrier layer 204, a barrier-coated polyethylene terephthalate film obtained by applying a barrier coating to a polyethylene terephthalate film, or a barrier film made of a barrier material such as EVOH can be used. When a film obtained by dry-laminating an aluminum foil as the metal foil 204c and a polyethylene terephthalate film as the base film 204a is used, the thickness of the aluminum foil can be 5 μm or more and 15 μm or less, and the thickness of the polyethylene terephthalate layer is It can be 6 μm or more and 25 μm or less. The thickness of the polyethylene terephthalate layer is preferably about 12 μm in terms of ease of processing with laser light, which will be described later.

In either case, a resin film such as nylon or polypropylene (PP) can be used as the base film 204a in addition to polyethylene terephthalate (PET). In particular, the PET biaxially stretched film is suitable because it has little expansion and contraction during the vapor deposition process and the laminating process.

An adhesive for dry laminating or an adhesive for non-solvent laminating may be used for the adhesive layer 205, or a polyolefin-based resin may be used for bonding by extrusion processing. The coating amount is preferably 0.5 g / m ² or more and 7.0 g / m ² or less.

HDPE, MDPE, LDPE, LLDPE and the like can be used for the sealant layer 206. In addition, there may be a layer containing a part of polybutene. Among the above-mentioned materials, LLDPE is particularly preferable. In particular, those having a density of 0.925 g / cm ³ or less and an MI (melt index) of 4 or more are preferable. As the sealant layer 26, a non-stretched film formed by a T-die method or an inflation method is preferably used.

The fragile portion 105 is composed of groove-shaped scratch processing portions 207a and 207b formed at least in the paper base material layer 202 and the base film layer 204 at a predetermined depth. The scratched portion 207a may be formed at least on the paper base material layer 202, and as shown in FIG. 4, the thermoplastic resin layer laminated on the outer side of the paper base material layer 202 together with the paper base material layer 202. It may be formed on the 201 and the print layer 208. It is desirable that the scratched portion 207b is formed at a depth that does not penetrate the base film layer 204, but even if it penetrates in a narrow range, the barrier property is not affected so much. Therefore, if it is partial, the base film layer 204 May be penetrated. The scratched portions 207a and 207b can be formed by using a well-known technique such as laser light or a blade mold.

The laminated structure of the sheet material 200 is not limited to this structure, and the thickness, stacking order, and material of each layer can be arbitrarily changed according to the required functions.

(Disassembly method)
5A to 5D show an example of a method of disassembling the packaging container 100. Each step of the method of disassembling the packaging container 100 will be described with reference to FIGS. 5A to 5D.

<Crushing process>
5A and 5B show a step of crushing the packaging container 100. As shown in FIG. 5A, in this step, the user of the packaging container 1 crushes the body portion 102 by pushing the two facing side plates 111a in the direction in which they are in contact with each other. At this time, the side plate 111b is folded in the internal direction of the packaging container 100.

In this step, the user can use the dividing portion 116. Specifically, as shown in FIG. 5B, by pushing the divided portion 116 inward of the packaging container 100 with a thumb 119 or the like, the entire divided portion 116 is gradually deformed, and the folded-back plate 108 and the side plate 111b Can be easily folded inside the packaging container 100 with a small force.

<Bending process>
FIG. 5C shows a step of bending the packaging container 100 along the fragile portion 105. In this step, the user first bends the side plate 111 in one direction along the fragile portion 105 (left view of FIG. 5C). After that, the side plate 111 is bent along the fragile portion 105 in the opposite direction to the previous one (right figure in FIG. 5C). The bending may be performed a plurality of times in each direction. By this step, the fragile portion 105 is broken.

<Roof plate separation process>
FIG. 5D shows a step of separating a part of the top 101 and the side plate 111 from the packaging container 100 along the fragile portion 105. In this step, the user tears and separates a part of the side plate 111 from the packaging container 100 along the fragile portion 105 (left figure in FIG. 5D). Since the fragile portion 105 is at least partially broken in the previous step, the user can separate the upper portion of the side plate 111 with a slight force starting from the fragile portion 105. As shown in the right figure of FIG. 5D, the separated packaging container 100 is separated into a state in which the upper portion and the top portion 101 of the body portion 102 and the lower portion of the body portion 102 are separately separated.

(Modification example)
Folding can be made easier by adding an auxiliary ruled line to the folded plate 108 and the side plate 111b. 6 to 8 show partial plan views of blanks 111 to 113 provided with auxiliary ruled lines.

FIG. 6 shows a blank 111 including an auxiliary ruled line 122 composed of one arcuate curve surrounding the divided portion 116 and two straight lines. FIG. 7 shows a blank 112 including a diamond-shaped auxiliary ruled line 123 composed of four straight lines surrounding the divided portion 116. FIG. 8 shows a blank 113 including four auxiliary ruled lines 124 formed in a predetermined range on a virtual line extending from the dividing portion 116 toward the outer edge of the folded plate 108 or the side plate 111b.

If the auxiliary ruled line surrounds the dividing portion 116 or is formed within a predetermined range on a virtual line extending from the dividing portion 116 toward the outer edge of the folded plate 108 or the side plate 111b, the shape and number of the auxiliary ruled lines are as described above. It is not limited to the form.

By adding each auxiliary ruled line, the folded-back plate 108 and the side plate 111b can be bent from the auxiliary ruled line, so that the folding of the folded-back plate 108 and the side plate 111b proceeds smoothly from pushing to folding. Therefore, the folding work becomes easier.

The packaging containers according to Examples 1 to 4 and Comparative Examples were prepared, and sensory evaluation was performed on the ease of folding. A blank for making a packaging container having a capacity of 2 liters was prepared, and the following packaging container was manufactured.

(Example 1)
The width of the dividing portion 116 was set to 30 mm.

(Example 2)
The width of the divided portion 116 was set to 30 mm, and the auxiliary ruled line 122 was formed.

(Example 3)
The width of the divided portion 116 was set to 30 mm, and the auxiliary ruled line 123 was formed.

(Example 4)
The width of the divided portion 116 was set to 30 mm, and the auxiliary ruled line 124 was formed.

(Comparison example)
The dividing portion 116 was not provided.

A sensory evaluation was performed on the ease of folding of each of the manufactured packaging containers by 30 adult males and 30 adult females. More than 80% of the subjects determined that the easily foldable packaging container was a foldable packaging container.

As a result of the evaluation, in the packaging containers according to Examples 1 to 4, 80% or more of the subjects were able to easily fold the packaging containers. On the other hand, in the packaging container according to the comparative example, since the divided portion 116 was not formed, less than 80% of the subjects were able to easily fold the packaging container.

From this evaluation result, it was confirmed that a packaging container that can be easily folded can be provided by forming the divided portion 116 and the auxiliary ruled line.

As described above, according to the present invention, during the folding work, the user can fold the packaging container 100 by putting a finger or the like on the dividing portion 116 having an arc shape whose cross section is gently curved, and thus the folding work. In the above, it is possible to provide a Goebel top type packaging container that can be easily folded with less burden on the fingers.

The present invention is useful for paper packaging containers and the like that contain liquids and the like.

100 Goebel top type packaging container 101 Top 102 Body 103 Bottom 105 Fragile part 106a, 106b Roof plate 107 Folded plate 108 Folded plate 110 Blank 111a, 111b Side plate 112 Bottom plate 113 Sealed part 116 Divided part 117 Convex part 118 Concave part 119 120 Square 121 Ruled line 122 to 124 Auxiliary ruled line 125 Boundary line 200 Sheet material 201 Thermoplastic resin layer 202 Paper base material layer 203 Adhesive resin layer 204 Barrier layer 204a Base material film 204b Vapor deposition layer 204c Metal foil 205 Adhesive layer 206 Sealant layer 207a , 207b Scratched part

Claims (2)

With the roof plate
A folded plate folded under the roof plate and
The side plate connected to the lower end of the folded plate and
A Goebel-top type packaging container including a ruled line formed in a predetermined range on a boundary line between the folded plate and the side plate.
The ruled line is not provided with a predetermined length at the center in the length direction of the boundary line .
Auxiliary ruled lines formed in a predetermined range on a virtual line extending from a region where the ruled line is not provided to a predetermined length toward the folded plate or the outer edge of the side plate are formed on the folded plate and the side plate. There is a Goebel top type packaging container. The Goebel-top type packaging container according to claim 1, wherein an auxiliary ruled line is formed on the folded plate and the side plate so as to surround an area in which the ruled line is not provided with a predetermined length.

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