JP7205063B2 - packaging container - Google Patents

Description

The present invention relates to packaging containers.

A packaging container is known that is formed by folding a sheet material into a box shape, overlapping the ends, and sealing.

For example, in Patent Document 1, a peelable pull tab is provided on the side seal of the container body using a sheet material with paper as a base material, and the pull tab is peeled off via a peel layer made of an easily peelable tape-like film. A possible packaging container (liquid packaging paper container) is disclosed. This packaging container can be dismantled by pulling the pull tab to peel off the side seal portion, or by pulling the pull tab provided on the side plate to cut through the side plate.

JP-A-9-290822

Since the packaging container of Patent Document 1 can be easily dismantled for disposal, it is useful for reducing the volume of waste.

In addition, the packaging container formed into a box shape by folding a sheet material as in Patent Document 1 has a simple structure and is easy to assemble. rice field.

The present invention has been made in view of such problems, and it can be transformed between a box-shaped state and a flat state, and even after being flattened once, it will return to the box-shaped state again. To provide a packaging container which can be reused by returning it and which has a high design property.

One aspect of the present invention for solving the above problems is a packaging container formed of a sheet material and deformable between a box-shaped state and a flat state, wherein the first and a second portion, wherein the opening is formed in the first portion, and the first portion and the second portion each have a convex polygonal face having a convex polygonal shape other than a square and a convex polygonal face. an isosceles trapezoidal surface extending from each side and having each side as one of two parallel sides; a plurality of folded surfaces provided between adjacent isosceles trapezoidal surfaces; and a peripheral edge that extends all around the outer edge, wherein the convex polygonal surface of the first portion and the convex polygonal surface of the second portion are similar, and the plurality of folded surfaces and the peripheral edge are each From the vertex of the convex polygonal face toward the periphery, the angle formed by the first side and the second side shared by the isosceles trapezoidal face adjacent to the folded face and the folded face is bisected. and the length of each folding crease is such that, in a flat state, the folding crease extends from the first side edge and the second side edge, which are adjacent to each other in a predetermined direction. The first and second parts are shorter than a line obtained by inverting line symmetry with the axis side and extending it until it intersects a straight line including the opposite side of the axis side of the isosceles trapezoidal surface adjacent in a predetermined direction, and the first part and the second part are , the peripheral edge portions are connected by side seal portions that are sealed to each other, the sheet material is folded at the peripheral edge portions in a flat state, and the first portion and the second portion are connected to each other by the side seal portions that are sealed to each other. a convex polygonal surface including the opening of the first portion, a convex polygonal surface opposite to the upper surface of the second portion, and an isosceles trapezoidal surface. and a folded piece obtained by folding the folded surface and the peripheral edge along the folding ruled line. can be transformed into a box-shaped state without projecting from the opposite side, and in the box-shaped state, the folded piece is separated from the side surface, the folded piece is extended, the sheet material is extended at the peripheral edge, and the second The packaging container can be deformed into a flat state by eliminating the gap between the first part and the second part and overlapping the first part and the second part with each other.

According to the present invention, it can be transformed between a box-shaped state and a flat state, and can be reused by returning to the box-shaped state even after being flattened once. It is possible to provide a packaging container with a high design property.

1A and 1B are a perspective view and a side view showing a box-shaped state of a packaging container according to a first embodiment of the present invention; FIG. The perspective view which shows the flat state of the packaging container which concerns on the 1st Embodiment of this invention. 1 is a plan view of a packaging container blank according to a first embodiment of the present invention; FIG. The perspective view which shows the box-shaped state of the packaging container which concerns on a comparative form. A plan view for explaining the length of folding creases The figure which shows the deformation|transformation procedure of the packaging container which concerns on the 1st Embodiment of this invention. A plan view showing a modified example of the blank

A packaging container according to an embodiment of the present invention will be described with reference to the drawings. In addition, in the embodiment and modified examples, the same reference numerals are given to the same or corresponding configurations, and the description thereof will be omitted as appropriate. In addition, in the following description, for the sake of convenience, the vertical direction when the packaging container is erected in a box shape is referred to as the vertical direction.

<Embodiment>
The packaging container 100 according to one embodiment of the present invention is formed by overlapping and sealing the ends of blanks obtained by cutting a sheet material into a predetermined shape, between a box-shaped state and a flat state. It is a transformable container.

1 shows a perspective view ((a) of FIG. 1) and a side view ((b) of FIG. 1) of the packaging container 100 in a box-shaped state, and FIG. 2 shows a perspective view of the packaging container 100 in a flat state. Figure shows. Moreover, the top view of an example of the blank of the packaging container 100 is shown in FIG. FIG. 2(a) is a perspective view showing a state in which the top surface 110 of the packaging container 100 in a flat state is turned upward, and FIG. 2(b) is a bottom surface 130 of the packaging container 100 in a flat state. is a perspective view showing a state in which the . In addition, in FIG. 1(b), in order to clarify the shape of the packaging container 100, illustration of the side seal portion 140 and the folding piece 150 shown in FIG. 1(a) is omitted.

(box-shaped state)
As shown in FIG. 1, packaging container 100 in a box-like state has an upper surface 110, a lower surface 130, and side surfaces 120 forming a gap (accommodating space). A side seal portion 140 and a folded piece 150 are provided along the outer peripheral surface of the side surface 120 . In the packaging container 100, as an example, the side seal portion 140 has an edge facing the upper surface 110 side and extends along the side surface 120, but the side seal portion 140 has an edge facing the lower surface 130 side. It may be along the side 120 in the folded state.

(flat state)
As shown in FIG. 2, the flat packaging container 100 is composed of a first portion 170a and a second portion 170b that overlap each other. As shown in FIG. 3, the blank for forming the packaging container 100 is composed of a blank 101a corresponding to the first portion 170a and a blank 101b corresponding to the second portion 170b.

The first portion 170a includes the upper surface 110, a plurality of upper isosceles trapezoidal surfaces 120a extending from each side of the upper surface 110, and a plurality of upper folded surfaces formed between the adjacent upper isosceles trapezoidal surfaces 120a. 150a, and an upper sealing margin 140a forming a peripheral edge portion along the edge of the upper isosceles trapezoidal surface 120a and the upper folded surface 150a on the side opposite to the upper surface 110, along the entire circumference of the outer edge of the first portion 170a. .

The second portion 170b includes the lower surface 130, a plurality of lower isosceles trapezoidal surfaces 120b extending from each side of the lower surface 130, and a plurality of lower isosceles trapezoidal surfaces 120b formed between adjacent lower isosceles trapezoidal surfaces 120b. Along the side folded surface 150b, the lower isosceles trapezoidal surface 120b, and the edge opposite to the lower surface 130 of the lower folded surface 150b, the lower side that constitutes the perimeter of the outer edge of the second portion 170b. and a seal allowance 140b.

The upper surface 110 and the lower surface 130 are convex polygonal surfaces. In the packaging container 100, as an example, the upper surface 110 and the lower surface 130 are formed in a congruent shape. For example, the upper surface 110 and the lower surface 130 may have similar shapes with different areas. The shape of the upper surface 110 and the lower surface 130 is not limited as long as it is a convex polygonal shape. As for the shape of the upper surface 110 and the lower surface 130, in addition to the hexagonal shape shown in the embodiment, a rectangular shape is also useful in terms of loading efficiency in a box-shaped state, convenience of removing members, and the like. An opening 111 is formed in the upper surface 110 .

The plurality of upper isosceles trapezoidal surfaces 120a and the plurality of lower isosceles trapezoidal surfaces 120b are surfaces that constitute the side surfaces 120 of the packaging container 100 in the box-like state. In the packaging container 100, as an example, the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b are rectangular. At least one of the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b may have a non-rectangular isosceles trapezoidal shape.

The upper isosceles trapezoidal surface 120 a extends from each side of the upper surface 110 (convex polygonal surface), and one of the two parallel sides is each side of the upper surface 110 . The lower isosceles trapezoidal surface 120 b extends from each side of the lower surface 130 (convex polygonal surface), and one of the two parallel sides is defined as each side of the lower surface 130 . Further, as shown in FIG. 1B, the side of the upper isosceles trapezoidal surface 120a on the side of the upper seal margin 140a and the side of the lower isosceles trapezoidal surface 120b on the side of the lower seal margin 140b have the same length. formed.

The upper folded surface 150a and the lower folded surface 150b are surfaces forming the folded piece 150 of the box-shaped packaging container 100, and are surfaces that are folded in the deformation process described later.

Upper and lower folding surfaces 150a and 150b extend from each vertex of upper and lower surfaces 110 and 130, as indicated by dotted lines in FIG. A fold-back ruled line 151 extending toward the peripheral edge of the second portion 170b is provided.

As shown in FIG. 3, the folding ruled line 151 formed on the upper folded surface 150a is formed by the first side 121a and the first side 121a shared by the upper isosceles trapezoidal surface 120a adjacent to the upper folded surface 150a and the upper folded surface 150a. The angle formed by the two sides 122a is bisected and extended. Similarly, the folding ruled line 151 formed on the lower folding surface 150b is also the first side 121b shared by the lower isosceles trapezoidal surface 120b adjacent to the lower folding surface 150b and the lower folding surface 150b. It extends to bisect the angle formed by the second side 122b.

The upper seal allowance 140a and the lower seal allowance 140b are belt-shaped surfaces provided to connect the first portion 170a and the second portion 170b at their peripheral edges. When connecting the first portion 170a and the second portion 170b, the first portion 170a and the second portion 170b are overlapped so that the upper sealing margin 140a and the lower sealing margin 140b face each other. The side seal portions 140 are formed by sealing, adhering, or the like the surfaces to be connected to each other. The shape of the upper sealing margin 140a and the lower sealing margin 140b can be arbitrarily set as long as there is a sealing margin that overlaps with each other in order to form the side seal portion 140 by overlapping.

The width of the side seal portion 140, that is, the width of the upper seal margin 140a and the lower seal margin 140b may be constant as long as the first portion 170a and the second portion 170b can be connected, or may be constant. It need not be, and the edge need not be straight. For example, the widths of the upper sealing margin 140a and the lower sealing margin 140b are formed so as to spread outward at a predetermined angle toward the folding ruled line 151 outside the upper folding surface 150a and the lower folding surface 150b, respectively. may By forming in this way, as will be described later, the plurality of upper isosceles trapezoidal surfaces 120a and the plurality of lower isosceles trapezoidal surfaces 120b are formed into a non-rectangular shape, and the packaging container 100 having the tapered side surfaces 120 is formed into a box. In the mold state, the peripheral edges can be aligned on straight lines parallel to the sides of the upper surface 110 and the lower surface 130, and the design can be improved.

The region to be sealed can be a belt-shaped region having a predetermined width, as shown by hatching in FIG. 3, for example. The packaging container 100 formed in this way has airtightness except for the opening 111 .

The blanks 101a and 101b can be formed by, for example, cutting a sheet material into a predetermined shape and providing ruled lines as indicated by thin and dotted lines in FIG.

The sheet material used for the blanks 101a and 101b is not particularly limited, but for example, a laminated film obtained by laminating a thermoplastic resin layer or a sealant layer on a paper base layer can be preferably used. In addition to these, a barrier layer, a functional film, or the like may be added as appropriate depending on the required functions.

(Regarding the length of folding lines)
In the packaging container 100, if the fold-back ruled line 151 is longer than a predetermined length, the tip of the folded-back piece 150 may protrude from the side where the adjacent folded-back piece 150 extends. FIG. 4 shows a perspective view of a packaging container 500 according to a comparative embodiment in which the tip of the folded piece 150 protrudes from the extending side of the adjacent folded piece 150 . In this way, when the folding piece 150 protrudes, the appearance of the packaging container 100 becomes poor. Moreover, when the protruding folded piece 150 is folded back along the surface of the adjacent folded piece 150, the thickness of the packaging container 100 increases and the appearance is not good. Furthermore, if the sheet material is thick, it may be difficult to stack a plurality of folded pieces 150 .

In order to prevent this, in the packaging container 100, the fold-back ruled line 151 is set as follows. In other words, when the packaging container 100 is flat, the fold-back ruled line 151 is adjacent to the fold-back ruled line 151 in a predetermined direction among the first side edges 121a and 121b and the second side edges 122a and 122b. A line that is axisymmetrically reversed with the side edge as an axis edge and extends until it intersects a straight line including the opposite side of the axis edge of the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b that are adjacent in a predetermined direction. set to be short.

The length of the folding ruled line 151 will be specifically described using the blank 101a. FIG. 5 shows a partially enlarged view of the blank 101a of the packaging container 100. As shown in FIG.

The folding ruled line 151 of length L1 indicated by the thick line in FIG. 5 will be described as an example. First, the fold-back ruled line 151 is drawn in a predetermined direction (as an example, the direction of the first side 121a in FIG. 5) as indicated by a white arrow with the adjacent side (the first side 121a) as the axis side. Suppose a line segment that is axisymmetrically inverted to . Then, the reversed line segment is extended until it intersects a straight line including the opposite side (second side 122a) of the axial side of the lower isosceles trapezoidal surface 120a adjacent in the above-described predetermined direction. A line segment 151' is obtained. The dimensions of each part of the packaging container 100 are determined so that the resulting relationship between the length L2 of the line segment 151 ′ and the length L1 of the folding ruled line 151 is L1<L2.

In the above description, the "predetermined direction" is the direction of the first side 121a (the left side of the paper surface of FIG. 5) when viewed from the fold-back ruled line 151. The direction (the right side of the paper surface of FIG. 5) may be the “predetermined direction”.

Specifically, in order to make the length L1 of the folded ruled line 151 shorter than the length L2 of the line segment 151′, for example, the length of each side of the upper surface 110 and the lower surface 130 is increased while the upper isosceles The height of the trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b (the length in the vertical direction of the packaging container 100) is set low. As a result, it is possible to prevent the tip of the folded piece 150 from protruding from the side where the adjacent folded piece 150 extends, while keeping the content of the packaging container 100 constant. As a result, the overlapping area of the folding pieces 150 can be eliminated, so that the amount of blanks 101a and 101b required for manufacturing the packaging container 100 can be reduced while keeping the contents constant.

(Deformation method)
Next, using the packaging container 100, an example of a method for transforming a flat packaging container into a box-like shape will be described. 6(a) to 6(d) are diagrams for explaining an example of a method for deforming the container body 100. FIG.

First, as shown in (a) of FIG. 6, the first portion 170a and the second portion 170b of the packaging container 100 in a flat state are attached at the periphery (specifically, the side seal portion 140 and the upper side, etc.). (along the crease between the leg trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b) to pull the first portion 170a and the second portion 170b apart. Thereby, a gap is formed between the first portion 170a and the second portion 170b, and the upper surface 110, the lower surface 130, and the side surface 120 are formed. At the same time, the upper folded surface 150a and the lower folded surface 150b each have sides (first sides 121a, 121b and second sides 121a, 121b and second sides 121a, 121b) shared by the adjacent upper and lower isosceles trapezoidal surfaces 120a, 120b. 122a, 122b) approach each other. As a result, the upper folded surface 150 a and the lower folded surface 150 b are folded so that the folded ruled line 151 faces outward in the gap, and the folded piece 150 is formed.

Next, as shown in FIG. 6B, the side seal portion 140 is made to face the upper surface 110 along the side surface 120 . Note that the side seal portion 140 may extend along the side surface 120 toward the lower surface 130 .

Next, as shown in (c) of FIG. 6 , the folded piece 150 is placed along the outer peripheral surface of the side surface 120 . The direction along which the folded pieces 150 are arranged is not limited, and as shown in FIG. Each folded piece 150 may be along a different direction.

At this time, the folding piece 150 may be attached to the surface of the side surface 120 . As a method for attaching the folded piece 150 to the side surface 120, for example, there is a method using a heat seal, a hot melt adhesive, or the like. Moreover, by attaching the packaging container 100 using a detachable joining member such as a hook-and-loop fastener or a snap button, the packaging container 100 that has been deformed from the box-shaped state to the flat state can be used again in the box-shaped state. It becomes possible to reuse the packaging container 100 in a good state.

By the above procedure, as shown in (d) of FIG. 6, the flat packaging container 100 can be transformed into a box shape.

The box-shaped packaging container 100 can be flattened by performing the procedure opposite to that described above.

Specifically, first, the folding piece 150 of the box-shaped packaging container 100 is separated from the side surface 120 .

Next, the first portion 170a and the second portion 170b are extended at the peripheral portion (more specifically, along the ruled line between the side seal portion 140 and the side surface 120).

Next, by eliminating the gap between the first portion 170a and the second portion 170b and overlapping the first portion 170a and the second portion 170b, the packaging container 100 is transformed into a flat state. can do.

<Modification>
In the above embodiment, an example of forming a packaging container using two blanks 101a and 101b corresponding to the first portion 170a and the second portion 170b was shown. good too. FIG. 7 shows a blank 102 according to a modified example. As shown in FIG. 7, the blank 102 is connected by a connecting portion 180 at a portion of the peripheral edge of the blank corresponding to the first portion 170a and the second portion 170b.

When forming the packaging container 100 using the blank 102, for example, by folding back at the connecting portion 180, the first portion 170a and the second portion 170b having circular peripheral edges are overlapped, and then, The upper sealing allowance 140a and the lower sealing allowance 140b are sealed. By integrally forming the blanks in this way, for example, when blanks are formed by punching sheet materials, many blanks can be punched from one sheet material, so that packaging containers can be manufactured at low cost. can be done.

When the first portion 170a and the second portion 170b of the packaging container 100 formed using the blank 102 are pulled apart to deform into a box shape, the connecting portion 180 is extended. Also, when deformed into a flat state, the connecting portion 180 is folded back.

Further, in the above-described embodiments and modifications, at least one of the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b may be formed as a non-rectangular isosceles trapezoidal surface. By forming the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b in this manner, at least one of the side surfaces 120 above and below the side seal portion 140 of the box-shaped packaging container can be forward tapered or reverse tapered. As a result, it is possible to provide a packaging container having a more highly designed shape.

Also, a spout may be attached to the opening 111 of the packaging container of the present invention. By attaching a spout to which a cap can be attached to the opening 111, the opening 111 can be easily sealed. In addition, by attaching the spout, for example, the packaging container folded flat can be transformed into a box shape, filled with a content such as a liquid, and then the opening 111 can be sealed using a cap or the like. For this reason, for example, there is no need for a sealing process for ensuring hermeticity in the filling line of contents, and it becomes unnecessary to guarantee sealing performance in the filling line. Therefore, by using the packaging container of the present invention, it is possible to efficiently fill the contents.

Moreover, according to the packaging container of the present invention, the packaging container can be transported in a flat state, so that the loading efficiency of the packaging container is good, and transportation and storage costs can be reduced.

INDUSTRIAL APPLICABILITY The present invention can be suitably used for packaging containers.

100, 500 packaging container 101a, 101b blank 110 upper surface 111 opening 120 side surface 120a upper isosceles trapezoidal surface 120b lower isosceles trapezoidal surface 130 lower surface 140 side seal portion 140a upper seal margin 140b lower seal margin 150 folded piece 150a upper folded surface 150b Lower folded surface 151 Folded line 151' Line segment 170a First part 170b Second part 180 Connection part

Claims (3)

A packaging container formed of a sheet material and deformable between a box-shaped state and a flat state,
comprising a first portion and a second portion overlapping each other in the flat state;
an opening is formed in the first portion;
The first portion and the second portion each extend from a convex polygonal face having a convex polygonal shape other than a quadrangle, and each side of the convex polygonal face, and each side is one of two parallel sides. an isosceles trapezoidal surface having an isosceles trapezoidal shape with one side, a plurality of folded surfaces provided between adjacent isosceles trapezoidal surfaces, a peripheral edge portion extending over the entire circumference of the outer edge,
has
the convex polygonal surface of the first portion and the convex polygonal surface of the second portion are similar,
Each of the plurality of folded surfaces and the peripheral edge portion has a first plane shared by the isosceles trapezoidal surface adjacent to the folded surface and the folded surface from the vertex of each convex polygonal surface toward the peripheral edge portion. a folding ruled line that bisects the corner formed by the side edge and the second side edge;
The length of the fold-back ruled line, in the flat state, is determined with the side adjacent to each of the first side and the second side in a predetermined direction as an axis side. Shorter than a line that is axisymmetrically inverted and extended until it intersects a straight line containing the opposite side of the axial side of the isosceles trapezoidal surface adjacent in the predetermined direction,
The first portion and the second portion are
In the peripheral portion, it is connected by a side seal portion sealed to each other, and has a sealing property except for the opening,
In the flat state,
The sheet material is folded at the peripheral portion to form a gap between the first portion and the second portion, and the upper surface is the convex polygonal surface including the opening of the first portion. , the lower surface of the second portion which is the convex polygonal surface and faces the upper surface, a plurality of side surfaces formed by the isosceles trapezoidal surface, the folded surface and the peripheral portion are folded along the folded ruled lines. forming a folded piece and
By stacking the folded pieces along the side surfaces in the predetermined direction, the ends of the folded pieces can be deformed into the box shape without protruding from the opposite sides,
In the box-shaped state,
Detaching the folded piece from the side surface,
Extending the folded piece,
stretching the sheet material at the peripheral portion to eliminate the gap between the first portion and the second portion;
A packaging container that can be deformed into the flat state by overlapping the first portion and the second portion. A packaging container formed of a sheet material and deformable between a box-shaped state and a flat state,
comprising a first portion and a second portion overlapping each other in the flat state;
an opening is formed in the first portion;
The first portion and the second portion each extend from a convex polygonal face having a convex polygonal shape other than a quadrangle, and each side of the convex polygonal face, and each side is one of two parallel sides. an isosceles trapezoidal surface having an isosceles trapezoidal shape with one side, a plurality of folded surfaces provided between adjacent isosceles trapezoidal surfaces, a peripheral edge portion extending over the entire circumference of the outer edge,
has
the convex polygonal surface of the first portion and the convex polygonal surface of the second portion are similar,
Each of the plurality of folded surfaces and the peripheral edge portion has a first plane shared by the isosceles trapezoidal surface adjacent to the folded surface and the folded surface from the vertex of each convex polygonal surface toward the peripheral edge portion. a folding ruled line that bisects the corner formed by the side edge and the second side edge;
The length of the fold-back ruled line, in the flat state, is determined with the side adjacent to each of the first side and the second side in a predetermined direction as an axis side. Shorter than a line that is axisymmetrically inverted and extended until it intersects a straight line containing the opposite side of the axial side of the isosceles trapezoidal surface adjacent in the predetermined direction,
The first portion and the second portion are
The peripheral portion is connected by a side seal portion sealed to each other and a connecting portion where the sheet material is folded back, and has airtightness except for the opening,
In the flat state,
The sheet material is folded at the side seal portion and stretched at the connection portion to form a gap between the first portion and the second portion, and to form a gap between the first portion. an upper surface that is the convex polygonal surface including the opening; a lower surface that is the convex polygonal surface of the second portion and faces the upper surface; a plurality of side surfaces formed by the isosceles trapezoidal surface; forming a folded piece in which the folded surface and the peripheral portion are folded along the folded ruled line;
By stacking the folded pieces along the side surfaces in the predetermined direction, the ends of the folded pieces can be deformed into the box shape without protruding from the opposite sides,
In the box-shaped state,
Detaching the folded piece from the side surface,
Extending the folded piece,
The sheet material is extended at the side seal portion, and the sheet material is folded back at the extended connection portion to eliminate the gap between the first portion and the second portion,
A packaging container that can be deformed into the flat state by overlapping the first portion and the second portion. 3. The method according to claim 1 or 2, wherein at least a portion of the side surface portion of the first portion or the second portion in the box-shaped state and a portion overlapping the side portion have joint members that can be attached to and detached from each other. packaging container.

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