JP2017202849A - Gable top type packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gable top type packaging container which is less likely to impose a burden on fingers during a folding operation and which can be easily folded.SOLUTION: A gable top type packaging container includes: a roof board; a folded plate that is folded below the roof board; a side plate that is connected to a lower end of the folded plate; and a first ruled line that is formed in a predetermined range on a boundary between the folded plate and the side plate. In the folded plate and the side plate, an easy-to-deform area, in which a plurality of second ruled lines extended in the same direction as a direction of the boundary are formed, is provided within a predetermined distance from the boundary.SELECTED DRAWING: Figure 1

Description

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

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

  In addition, a paper packaging container that reduces the volume of trash by making it easier for the user to fold the packaging container when the packaging container is disposed of by placing a folding ruled line on the paper-belt type paper packaging container. Known (see Patent Documents 2 and 3).

JP-A-2015-85945 Japanese Utility Model Publication No. 56-43717 Japanese Utility Model Publication No. 61-137516

  When the side plate 111 of the packaging container body 102 is to be folded into the packaging container when folding the paperbelt-type paper packaging container, as shown in FIG. There is a method of pushing the corner 120 where the folded plate 108 and the side wall 111 are in contact with the finger toward the inside of the packaging container. However, a certain amount of force is required for the operation of pushing the corner portion of the packaging container with a finger, and the folding operation may be hindered when the corner portion bites into the finger during the folding operation.

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

  One aspect of the present invention for solving the above problems is a roof plate, a folded plate folded under the roof plate, a side plate connected to the lower end of the folded plate, and a boundary line between the folded plate and the side plate. And a first ruled line formed in a predetermined range of the first and second gobeltop type packaging containers, wherein the folded plate and the side plate extend in the same direction as the boundary line within a predetermined distance from the boundary line. This is a gobeltop-type packaging container having an easily deformable region in which a plurality of ruled lines are formed.

  ADVANTAGE OF THE INVENTION According to this invention, in the folding operation | work, the burden on a finger can be reduced and it can provide the govel top type packaging container which can be folded easily.

1 is a perspective view of a gobeltop packaging container according to an embodiment of the present invention. Front view and sectional view of folded plate and side plate according to one embodiment of the present invention The top view of the blank concerning one 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 dismantling method of the gobeltop type packaging container which concerns on one Embodiment of this invention. The figure which shows the dismantling method of the gobeltop type packaging container which concerns on one Embodiment of this invention. The figure which shows the dismantling method of the gobeltop type packaging container which concerns on one Embodiment of this invention. The figure which shows the dismantling method of the gobeltop type packaging container which concerns on one Embodiment of this invention. The top view of the blank which concerns on the modification of this invention The top view of the blank which concerns on the modification of this invention The top view of the blank which concerns on the modification of this invention The figure which shows the dismantling method of the gable top type packaging container which concerns on a prior art

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

  The packaging container 100 is formed by folding a blank 110 obtained by processing a sheet material into a box shape, and overlapping and sealing the end portions. The packaging container 100 includes a top portion 101 that becomes an upper portion, a trunk portion 102 that becomes a side surface, and a bottom portion 103 that becomes a lower portion when standing upright. The top portion 101 includes two roof plates 106 (106 a and 106 b), and a folding plate 107 and a folded plate 108 that are folded between the roof plates 106. A side plate 111 a is connected to the lower end of each roof plate 106. Further, a side plate 111 b is connected to the lower end of each folded plate 108. As an example, the side plates 111a and 111b are formed so that a weakened portion 105 whose strength is weakened wraps around the body portion 102 in the width direction that is the left-right direction when the packaging container 100 is erected. . Note that the fragile portion 105 may not be formed.

  As shown in FIG. 2, a first ruled line 121 is formed on the boundary line 122 between the folded plate 108 and the side plate 111b, and the first ruled line 121 and the boundary line 122 are formed on the folded plate 108 and the side plate 111b. Within a predetermined distance, an easily deformable region 116 is formed in which a plurality of second ruled lines 115 extending in the same direction as the first ruled lines 121 and the boundary lines 122 are formed. The easily deformable region 116 is preferably provided on each of the two folded plates 108 and the side plate 111b, but may be provided on only one side.

  As shown in the cross-sectional view of FIG. 2, the second ruled line 115 formed in the easily deformable region 116 includes a linear recess 117 formed on the surface of the blank 110 and a back surface of the blank 110 corresponding to the recess 117. The linear convex part 118 formed in the. The concave portion 117 may be formed on the back surface of the blank 110 and the convex portion 118 may be formed on the front surface of the blank 110. Further, the second ruled line 115 may be constituted by only one of the concave portion 117 and the convex portion 118. The first ruled lines 121 and the second ruled lines 115 can be formed by a known technique, for example, by pressing the blank 110 from both sides with a roller or the like. The first ruled line 121 may be formed so as to pass through the easily deformable region 116, or may be formed by the easily deformable region 116 so that a predetermined length is not provided near the center in the length direction.

  As shown in the cross-sectional view of FIG. 2, the easily deformable region 116 does not form the corner portion 120 having a small radius of curvature between the folded plate 108 and the side plate 111b, and the position is loosened by the plurality of second ruled lines. It becomes a curved arc shape.

(blank)
In FIG. 3, the top view of the blank 110 which is an example of the blank used as the raw material of the packaging container 100 is shown. The blank 110 includes roof plates 106a and 106b that constitute the top portion 101, folding plates 107 and folded plates 108, side plates 111a and 111b that constitute the trunk portion 102, a bottom plate 112 that constitutes the bottom portion 103, and end portions. And a formed seal portion 113. A first ruled line 121 is formed on the boundary line 122 between the folded plate 108 and the side plate 111 b connected to the lower end of the folded plate 108. In the side plates 111 a and 111 b, the fragile portion 105 is formed so as to go around the trunk portion 102.

  As shown in FIG. 3, the easily deformable region 116 is formed so as to be circular in the state of the blank 110, and is formed so that the center coincides with the center in the length direction of the first ruled line 121 and the boundary line 122. . The shape of the easily deformable region 116 is not limited to a circular shape, and an arbitrary shape such as a rectangular shape can be adopted. The width in the left-right direction of the easily deformable region 116 is preferably 7 mm or more, and may be formed over the entire width direction of the side wall 111b. This is because, when the width of the easily deformable region 116 is less than 7 mm, when the packaging container 100 is folded, the finger cannot be fully accommodated in the easily deformable region 116 and the effect cannot be sufficiently obtained. Moreover, it is preferable that the space | interval of the ruled line 115 is less than 20 mm.

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

  The thermoplastic resin layer 201 can be formed on the paper base 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 outside the thermoplastic resin layer 201 to display a pattern or product information. The printing layer 208 can be formed by a method such as gravure printing or offset printing using a known ink. Adhesiveness such as corona treatment can be applied to the thermoplastic resin layer 201 to enhance the adhesion with the printing layer 208. An overcoat layer may be provided outside the printed layer 208 in order to improve wear resistance or surface decoration.

For the paper base layer 202, paperboard such as 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 to} 500 g / m ² and a density of 0.6 g / cm ^{3 to} 1.1 g / cm ³ can be used.

  The adhesive resin layer 203 is a layer made of a polyolefin-based resin having a function of bonding the paper base material layer 202 and the base material 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 surface of the paper base material layer 202 or 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 it as 10 micrometers or more.

  The barrier layer 204 is a vapor-deposited film including a vapor-deposited layer 204b obtained by vapor-depositing a metal such as aluminum, silica, or alumina, and a base film 204a, or a laminated film obtained by dry-laminating a metal foil 204c such as aluminum on the base film 204a. Can be used. The thickness of the vapor 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 aluminum foil as the metal foil 204c and 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 from the viewpoint of ease of processing by laser light described later.

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

For the adhesive layer 205, a dry laminating adhesive or a non-solvent laminating adhesive may be used, or an extruding process may be used to adhere with a polyolefin resin. The coating amount is preferably from 0.5 g / m ^{2 to} 7.0 g / m ² .

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

  The fragile portion 105 includes groove-shaped scratched portions 207a and 207b formed at a predetermined depth on at least the paper base layer 202 and the base film layer 204. The scratch processing portion 207a only needs to be formed on at least the paper base material layer 202. As shown in FIG. 4, the thermoplastic resin layer laminated on the outside of the paper base material layer 202 together with the paper base material layer 202. 201 and the printing layer 208 may be formed. The scratched portion 207b is desirably 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 less affected. May be penetrated. The scratched portions 207a and 207b can be formed using a known technique such as laser light or a blade shape.

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

(Dismantling method)
5A to 5D show an example of a method for disassembling the packaging container 100. FIG. Each process of the disassembly method of the packaging container 100 is demonstrated with reference to FIG.

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

  In this step, the user can use the easily deformable region 116. Specifically, as shown in FIG. 5B, when the easily deformable region 116 is pushed inward of the packaging container 100 with the thumb 119 or the like, the entire easily deformable region 116 is gradually deformed by the second ruled line 115. The folding 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 process 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 diagram in FIG. 5C). Thereafter, the side plate 111 is bent along the fragile portion 105 in the direction opposite to the previous direction (the right diagram in FIG. 5C). Bending may be performed multiple times in each direction. By this process, the fracture of the fragile portion 105 proceeds.

<Roofing plate separation process>
FIG. 5D shows a process of separating a part of the top portion 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 diagram in FIG. 5D). In the previous step, since the fragile portion 105 is at least partially broken, the user can separate the upper portion of the side plate 111 from the fragile portion 105 with a slight force. The separated packaging container 100 is separated into a state in which the upper portion and the top portion 101 of the trunk portion 102 and the lower portion of the trunk portion 102 are separately separated as shown in the right diagram of FIG. 5D.

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

  FIG. 6 shows a blank 111 including an auxiliary ruled line 123 made up of one arcuate curve and two straight lines surrounding the dividing portion 116. FIG. 7 shows a blank 112 including a rhombus-shaped auxiliary ruled line 124 composed of four straight lines surrounding the dividing portion 116. FIG. 8 shows a blank 113 including four auxiliary ruled lines 125 formed in a predetermined range on a virtual line extending from the easily deformable region 116 toward the outer edge of the folded plate 108 or the side plate 111b.

  If the auxiliary ruled line surrounds the easily deformable region 116 or is formed within a predetermined range on an imaginary line extending from the easily deformable region 116 toward the outer edge of the folded plate 108 or the side surface plate 111b, the shape and number of the auxiliary ruled lines are It is not limited to said form.

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

  The packaging container which concerns on an Example and Comparative Examples 1-3 was created, and sensory evaluation was performed about the ease of folding. A blank for producing a packaging container having a capacity of 2 liters was prepared to produce the following packaging container.

(Example)
A second ruled line having a line width of 2 mm was formed in a circular region having a diameter of 30 mm centered on the left and right center of the first ruled line at an interval of 5 mm, thereby forming an easily deformable region.

(Comparative Example 1)
No easy deformation area was provided.

(Comparative Example 2)
A second ruled line having a line width of 2 mm was formed in a circular region having a diameter of 30 mm centered on the left and right center of the first ruled line with an interval of 20 mm to be an easily deformable region. The difference from the embodiment is the interval between ruled lines.

(Comparative Example 3)
A second ruled line having a line width of 2 mm was formed in a circular region having a diameter of 6 mm centered on the left and right center of the first ruled line at an interval of 5 mm, thereby forming an easily deformable region. The difference from the embodiment is the size of the easily deformable region.

  A sensory evaluation of the ease of folding of each manufactured packaging container was performed by 30 adult men and 30 adult women. More than 80% of the subjects determined that the packaging container that could be easily folded was a folding packaging container.

  As a result of the evaluation, 80% or more of the subjects were able to easily fold the packaging container according to the example.

  On the other hand, since the easily deformable region 116 is not formed in the packaging container according to Comparative Example 1, less than 80% of the subjects were able to easily fold the packaging container. Moreover, the packaging container which concerns on the comparative example 2 had the space | interval of a ruled line, and the circular arc shape was not formed in the easily deformable area | region. For this reason, it became difficult to hold down the easily deformable region, and less than 80% of the subjects could easily fold the side plate. Moreover, the packaging container which concerns on the comparative example 3 has a narrow area of an easily deformable area | region, and a part of finger | toe may not enter into an easily deformable area | region. For this reason, it became difficult to hold down the easily deformable region, and less than 80% of the subjects could easily fold the side plate.

  From this evaluation result, it was confirmed that a packaging container that can be easily folded can be provided by forming the pressurizing portion region.

  As described above, according to the present invention, the user can fold the packaging container 100 by applying a finger or the like to the easily deformable region 116 having a gently curved cross section during the folding operation. It is possible to provide a gable-top type packaging container that can be easily folded with less burden on the fingers during work.

  The present invention is useful for a paper packaging container or the like that contains a liquid or the like.

DESCRIPTION OF SYMBOLS 100 Gobeltop type packaging container 101 Top part 102 Body part 103 Bottom part 105 Fragile part 106a, 106b Roof board 107 Folding board 108 Folding board 110 Blank 111a, 111b Side board 112 Bottom board 113 Seal part 115 2nd ruled line 116 Easy deformation area 117 Concave part 118 Convex part 119 Thumb 120 Corner part 121 First ruled line 122 Boundary line 123-125 Auxiliary ruled line 200 Sheet material 201 Thermoplastic resin layer 202 Paper base material layer 203 Adhesive resin layer 204 Barrier layer 204a Base film 204b Deposition layer 204c Metal foil 205 Adhesive layer 206 Sealant layer 207a, 207b Scratched part

Claims (3)

With roofing boards,
A folded plate folded under the roof plate;
A side plate connected to the lower end of the folded plate;
A gobeltop-type packaging container including a first ruled line formed in a predetermined range on a boundary line between the folded plate and the side plate,
A gobeltop-type packaging container provided with an easily deformable region in which a plurality of second ruled lines extending in the same direction as the boundary line are formed on the folded plate and the side plate within a predetermined distance from the boundary line.   The center of the said easily deformable area | region is located in the center of the length direction of the said boundary line, The bevel top type packaging container of Claim 1.   The gobeltop-type packaging container according to claim 1 or 2, wherein the first ruled line is not provided with a predetermined length at the center in the length direction by the easily deformable region.

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