JP7679704B2 - Variable size wrap-around carton blanks - Google Patents

Description

The present invention relates to a carton that is compatible with a wrap-around type automatic box-making machine. In particular, it relates to a blank for a size-adjustable wrap-around carton that allows the packaging size to be changed without changing the type or product.

Generally, cartons are paper containers, and are widely used. They are made by assembling blanks made of paperboard or corrugated cardboard into a three-dimensional box shape to store the contents.

The wrap-around method is particularly productive and is commonly used in automatic carton making machines. In particular, when using blanks known as the Yakko type (Tato type), it is particularly suitable for packaging thin products or as packaging material for products with different quantities.

Patent Document 1 proposes a carton whose size can be changed. However, although the proposed content allows for size changes, there are size limitations, and since there are no flaps, there is a risk that the strength will be insufficient. It is not compatible with wrap-around type automatic box-making machines, and its applications are limited.

Japanese Utility Model Application Publication No. 3-035019

The present invention was made in consideration of such circumstances, and aims to provide a blank for a wrap-around carton that is suitable for use with a wrap-around type automatic box-making machine and allows the height of the carton to be changed without changing the shape.

As a means for solving the above problem, the invention described in claim 1 is:
A carton blank to be assembled and formed by a wrap-around type automatic box-making machine,
The carton formed is a hexahedron,
The six sides are the bottom, four sides of the body, and the top.
The blank is made of a flat material and is formed with a square outer periphery,
The blank has a rectangular bottom surface of the carton located in the center of the square,
The four sides of the rectangular base face directly opposite the four corners of the square,
Four rectangular flaps that form the four faces of the hexahedral body are formed continuously from the four sides of the rectangular bottom via fold lines,
The four rectangular flaps are further connected to flaps that can be folded inward from four sides to form a top surface,
The two flaps that can form the top surface are isosceles triangles with right-angled vertices at the corners of the square on the short sides of the rectangular bottom surface, and the two flaps that can form the top surface are trapezoids with the right-angled vertices of the isosceles triangles with the right-angled vertices at the corners of the square on the long sides of the rectangular bottom surface, with the right-angled vertices cut off,
The four rectangular flaps forming the four faces of the hexahedral body have a plurality of fold lines parallel to and equidistant from the fold lines of the four sides of the connected rectangle of the bottom face,
Among the four rectangular flaps forming the four faces of the hexahedral body, a pair of opposing flaps have small flaps provided on both side ends of a rectangle surrounded by parallel fold lines and sides of the flaps, the small flaps being continuous with each other through the fold lines;
Among the small flaps, the tip of the outermost small flap is provided so as to be on the same line as the outer periphery of the square or to be inside thereof,
When the length of the short side of the bottom rectangle is b, and the distance from the fold line closest to the long side of the bottom rectangle among the multiple fold lines of the flap that are continuous with the long side of the bottom rectangle and are parallel to the long side, to the upper side of the trapezoid, is a,
a≦b
And,
This blank is a size-variable wrap-around carton blank, characterized in that the top surface is formed by folding inward any of a number of fold lines that are parallel to and equidistant from the four sides of the rectangular bottom surface and that are provided on the four rectangular flaps that form the four surfaces of the hexahedral body, making it possible to manufacture a number of different types of hexahedral cartons of different heights.

The present invention makes it possible to provide blanks for wrap-around cartons that are suitable for use with wrap-around type automatic box-making machines and allow the height of the carton to be changed without changing the shape.

In other words, the blank is made of a flat material and is formed with a square as its outermost periphery, with the rectangular bottom surface of the carton located in the center of the square, and the four sides of the rectangular bottom surface facing the four corners of the square, so that when the flaps that form the top surface are folded in when the blank is made into a box, the four corners of the square are folded in opposite directions, resulting in a pleasing design.

In addition, a blank shape with a square outer periphery can reduce the loss of material used to form the blank.

The two flaps that can form the top surface are isosceles triangles with the corners of the square as right-angle vertices on the two flaps on the long sides of the rectangular base surface, and are trapezoids with the vertices of an isosceles triangle cut off, with the corners of the square as right-angle vertices on the two flaps on the long sides of the rectangular base surface. Each of the four rectangular flaps that form the four sides of the hexahedral body has multiple fold lines that are parallel to and equidistant from the fold lines of the four sides of the rectangular base surface that it connects to. This means that when folding the flaps to form the top surface of the carton during box making, one of the multiple fold lines can be selected and folded to selectively determine the height of the carton to be made.

In other words, it can be used as a blank for a wrap-around carton with variable size, allowing size changes without changing the type or product type in a wrap-around type automatic box-making machine.

This can be used, for example, when storing contents of the same size in sheets with different numbers. In other words, by using the size-adjustable wrap-around carton blanks of the present invention, it becomes possible to handle small lots and a wide variety of products.

Of the four rectangular flaps that form the four sides of the hexahedral body, a pair of opposing flaps have small flaps that are continuous with each other via the fold lines at both ends of the rectangle surrounded by the parallel fold lines and the sides of the flaps. This makes it possible for the ridges of the body of the assembled hexahedral carton to be sealed, and is also effective in increasing the strength of the hexahedron.

The tip of the outermost small flap is located on the same line as the outer periphery of the square or further inside, allowing the wrap-around method to be used smoothly without interfering with automatic box making. In addition, because the outermost periphery of the blank is square, it is possible to reduce the loss of blank material when punching out the blank.

When the length of the short side of the bottom rectangle is b, and the distance from the fold line closest to the long side of the bottom rectangle among the multiple fold lines of the flap that are continuous with the long side of the bottom rectangle and are parallel to the long side, to the upper side of the trapezoid, is a,
a≦b
This makes it possible to fold the flaps that can form the top surface of the carton inwardly when forming the top surface of the carton, without the tips of the flaps protruding from the opposing ridges of the top surface.

FIG. 1 is a schematic plan view of a blank for explaining one embodiment of a blank for a size-variable wrap-around carton according to the present invention. FIG. 2 is a schematic plan view of a blank for illustrating each part constituting the blank in one embodiment of a blank for a size-variable wrap-around carton according to the present invention. FIG. 3 is a schematic plan view of a blank for illustrating the details of a flap constituting the blank in one embodiment of a blank for a size-variable wrap-around carton according to the present invention. FIG. 4 is a schematic plan view of one embodiment of a blank for a variable size wrap-around carton according to the present invention, for illustrating the characteristic portions and dimensions of the blank in more detail. FIG. 5 is a schematic perspective view illustrating one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to a high height at the third fold line and assembled. FIG. 6 is a schematic perspective view illustrating one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to the middle height at the second fold line and assembled. FIG. 7 is a schematic perspective view illustrating one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to a low height at the first fold line and assembled.

The present invention will be described in more detail below with reference to Figures 1 to 7. However, the present invention is not limited to the examples shown here. The present invention is defined by the claims.

Figure 1 is a schematic plan view of a blank to explain one embodiment of a wrap-around carton according to the present invention.

The present invention relates to a carton blank (100) that is assembled and formed by an automatic box-making machine using the wrap-around method, and the carton formed thereby is a hexahedron. The six sides are the bottom, four sides of the body, and the top, and the blank (100) is made of a flat material such as paperboard or cardboard. In this specification, the term carton includes boxes made of paperboard or cardboard.

Cartons assembled using the wrap-around method are widely used as product packaging containers in a variety of fields, including beverages and processed foods. Using blanks (100) in sheet-like paperboard or corrugated cardboard, the cartons are assembled into a three-dimensional shape by folding along the creases and folding in the flaps, and then glued together in an automatic box-making machine.

The present invention proposes a blank (100) for use in this wrap-around type automatic carton making machine, and aims to provide a blank for a wrap-around carton of variable size that can make cartons of different heights without changing the shape.

The example blank shown in Figure 1 is formed with a square (90) as the outermost periphery, with flaps formed from the center on all four sides, and is of a shape also known as a "Yakko" type. The blank (100) can be made of cardboard, paperboard, etc.

The blank (100) has the rectangular bottom surface (10) of the carton placed in the center of the square (90), with each of the four sides of the rectangular bottom surface (10) directly facing the four corners of the square (90).

The rectangle (10) on the bottom surface is the portion surrounded by creases (50), (51), (52), and (53). As can be seen from the example shown in FIG. 1, the short sides of the rectangle are creases (50) and (51), and the long sides of the rectangle are creases (52) and (53).

Flaps that form the four sides of the rectangular bottom surface (10) and the top surface of the hexahedral body are formed continuously from the four sides, and are connected via fold lines (50), (51), (52), and (53).

In the example shown in Figure 1, the flaps on the four sides of the hexahedral body are rectangular parts with halftone dots. The size-adjustable wrap-around carton blank of the present invention has multiple fold lines pre-defined on the flaps on the four sides of the hexahedral body, making it possible to make cartons of different heights in a wrap-around type automatic box making machine without changing the type or shape.

Figure 2 is a schematic plan view of a blank for use in one embodiment of a size-adjustable wrap-around carton blank according to the present invention, illustrating the various components that make up the blank.

As mentioned above, the blank (100) has the rectangular bottom surface (10) of the carton positioned in the center of the square (90), and the four sides of the rectangular bottom surface (10) face the four corners of the square (90). In the example shown in Figure 2, the four corners of the square (90) are shown positioned vertically and horizontally.

Four rectangular flaps (20), (21), (22), and (23) are formed continuously from the four sides of the rectangular base (10) via fold lines, forming the four faces of the hexahedral body.

In the example shown in FIG. 2, the flaps on the four sides of the hexahedral body are four rectangular portions with halftone dots.

That is, the rectangular flap (20) is continuous with the rectangular bottom surface (10) via the fold line (50).

Similarly, the rectangular flap (21) is continuous with the rectangular bottom surface (10) via the fold line (51).

Similarly, the rectangular flap (22) is continuous with the rectangular bottom surface (10) via the fold line (52).

Similarly, the rectangular flap (23) is continuous with the rectangular bottom surface (10) via the fold line (53).

Furthermore, continuing from the four rectangular flaps that form the four sides of the hexahedral body are flaps that can be folded inward from all four sides to form the top surface.

In other words, the rectangular flap (20) is connected to a flap (30) that can form a top surface.

Similarly, a flap (31) that can form the top surface is folded continuously from the rectangular flap (21).

Similarly, the rectangular flap (22) is connected to a flap (32) that can form a top surface.

Similarly, a flap (33) that can form a top surface is continuous with the rectangular flap (23).

These four flaps that form the top surface can be folded inward from all four sides to form a rectangular top surface when the box is made using a wrap-around type automatic box-making machine.

The flaps capable of forming the top surface are the flap capable of forming the top surface (30) on the short side of the rectangular base surface (10), and the two flaps capable of forming the top surface (31), which are isosceles triangles with right-angled vertices at the corners of a square (90).

The two flaps (32) and (33) that can form the top surface on the long side of the rectangular base (10) are trapezoids with the apex of an isosceles triangle cut off, with the corner of the square (90) as the right angle apex.

This cutting off of the apex is effective in preventing the right-angled apex of the corner of the square (90) from protruding from the rectangle of the top surface when the blank (100) is assembled into a box to form the top surface, and the definition of this dimension will be described later in the explanation of Figure 4.

Of the four rectangular flaps that form the four sides of the hexahedral body, a pair of opposing flaps have small flaps (40) that are continuous with each other via the fold lines at both ends of the rectangle surrounded by the fold lines and the sides of the flaps.

In the example shown in FIG. 2, a rectangular flap (20) is connected to the short side of the rectangular bottom surface (10), and a small flap (40) is provided on the rectangular flap (21) opposite it.

In the example shown in Figure 2, three small flaps (40) are provided on each side. The small flaps (40) are effective in sealing the ridges of the body of the hexahedron during box making, and are also effective in increasing the mechanical strength of the hexahedron.

Figure 3 is a schematic plan view of a blank for use in one embodiment of a size-adjustable wrap-around carton blank according to the present invention, illustrating the details of the flaps that make up the blank.

The four rectangular flaps that form the four sides of the hexahedral body have multiple fold lines that are parallel to the fold lines of the four sides that form the connected rectangular bottom surface (10) and are equidistant from the fold lines of the four sides. In the example shown in Figure 3, each flap has three fold lines.

In the example shown in Figure 3, the flaps on the four sides of the hexahedral body are four rectangular parts with halftone dots.

The fold lines on the four sides of the connecting bottom rectangle (10) are the boundary lines with each flap, and there are four of them: fold line (50), fold line (51), fold line (52), and fold line (53).

That is, the rectangular flap (20) on the short side has three fold lines (60), (70), and (80) in order from the side closest to the rectangular bottom surface (10).

Similarly, the rectangular flap (21) on the opposing short side has three fold lines (61), (71), and (81) in order from the side closest to the bottom rectangle (10).

The rectangular flap (22) on the long side has three fold lines (62), (72), and (82) in order from the side closest to the rectangular bottom surface (10).

Similarly, the rectangular flap (23) on the opposing short side has three fold lines (63), (73), and (83) in order from the side closest to the bottom rectangle (10).

These flaps have multiple fold lines, and when folding the flaps to form the top surface, one of the fold lines is selected and folded, allowing the height of the carton to be selectively determined.

Therefore, in the example shown in Figure 3, each rectangular flap has three fold lines, so cartons of three different heights can be made by selecting which fold lines to use.

The blank for a size-adjustable wrap-around carton according to the present invention has multiple fold lines pre-applied on the four flaps of the hexahedral body, making it possible to make cartons of different heights in a wrap-around type automatic box-making machine without changing the shape.

FIG. 4 is a schematic plan view of one embodiment of a blank for a variable size wrap-around carton according to the present invention, for illustrating the characteristic portions and dimensions of the blank in more detail.

In the example shown in Figure 4, of the four rectangular flaps that form the four sides of the hexahedral body, a pair of opposing flaps have small flaps (40) that are continuous with each other via the fold lines at both ends of a rectangle bounded by the parallel fold lines and the sides of the flaps.

In the example shown in Figure 4, the four rectangular flaps that form the four sides of the hexahedral body are rectangular portions with halftone dots.

In the example shown in FIG. 4, a rectangular flap (20) connected to the short side of the rectangular bottom surface (10) and a rectangular flap (21) facing it each have small flaps (40).

In the example shown in Figure 4, three small flaps (40) are provided on each side. The small flaps (40) are effective in sealing the ridges of the body of the hexahedron during box making, and are also effective in increasing the mechanical strength of the hexahedron.

The blank for the size-adjustable wrap-around carton according to the present invention must be suitable for use with an automatic box-making machine that uses the wrap-around method. As shown in FIG. 4, the tip of the outermost small flap (40) is on the same line as the outer periphery of the square or is located inside it, so that automatic box-making can be done smoothly using the wrap-around method without interfering with it.

In addition, since the outermost periphery of the blank (100) is a square (90), it is possible to reduce material loss of the blank (100) even when forming the blank (100).

In addition, in the blank for a size-adjustable wrap-around carton according to the present invention, as shown in FIG. 4, when the length of the short side of the bottom rectangle (10) is b, and the distance from the fold line closest to the long side of the bottom rectangle (10) among the multiple fold lines of the flap that are continuous with the long side of the bottom rectangle (10) and are parallel to the long side, to the top side of the trapezoid is a,
a≦b
It is.

As can be seen in the example shown in FIG. 4, the length (b) of the short side of the bottom rectangle (10) is the distance between fold line (52) and fold line (53), and the distance (a) to the top side of the trapezoid is the distance between fold line (63) and the top side of the trapezoid of the flap (33) that can form the top surface.

Because the distance (a) to the top side of the trapezoid and the length (b) of the short side of the rectangular base (10) are in this relationship, when the flap (32) capable of forming the top surface and the flap (33) capable of forming the top surface are folded inward to form the top surface of the carton, the tips of the flaps do not extend beyond the opposing ridges of the top surface, forming a rectangular top surface, and the carton can be made using an automatic box-making machine that uses the wrap-around method.

This means that by folding the flaps along creases (63) and (62), a rectangular top surface can be formed without protruding beyond the opposing edges of the top surface, even when the distance (a) to the top edge of the trapezoid is at its maximum.

Figure 5 is a schematic perspective view of one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to a high height and assembled at the third fold line.

The example shown in FIG. 5 is an example of assembling a carton to a higher variable height. That is, the triangular top flap (30) is folded in at the fold line (80), and the triangular top flap (31) is folded in at the fold line (81).

Furthermore, the trapezoidal flap (32) capable of forming the top surface is folded in along the crease (82), and the flap (33) capable of forming the top surface is folded in along the crease (83). In this way, the four flaps are folded inward to form the rectangular top surface of the carton.

Therefore, in this case, in one embodiment of the blank for the size-variable wrap-around carton, it is possible to form a carton with the highest height (h) of the three stages.

Figure 6 is a schematic perspective view of one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to the middle height at the second fold line and assembled.

The example shown in FIG. 6 is an example of assembling a carton with a medium variable height. That is, the triangular top flap (30) is folded in at the fold line (70), and the triangular top flap (31) is folded in at the fold line (71).

Furthermore, the trapezoidal flap (32) capable of forming the top surface is folded in along the crease (72), and the flap (33) capable of forming the top surface is folded in along the crease (73). In this way, the four flaps are folded inward to form the rectangular top surface of the carton.

Therefore, in this case, in one embodiment of a blank for a size-variable wrap-around carton, it is possible to form a carton with a medium height (h) out of the three levels.

Figure 7 is a schematic perspective view of one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention, illustrating how the carton is folded to a low height and assembled at the first fold line.

The example shown in FIG. 7 is an example of assembling a carton with a high variable height. That is, the triangular top flap (30) is folded in at the fold line (60), and the triangular top flap (31) is folded in at the fold line (61).

Furthermore, the trapezoidal flap (32) capable of forming the top surface is folded in along the crease (62), and the flap (33) capable of forming the top surface is folded in along the crease (63). In this way, the four flaps are folded inward to form the rectangular top surface of the carton.

In the blank for a size-adjustable wrap-around carton according to the present invention, as described above, when the length of the short side of the bottom rectangle (10) is b, and the distance from the fold line closest to the long side of the bottom rectangle (10) among the multiple fold lines of the flap that are parallel to the long side of the bottom rectangle (10) to the top side of the trapezoid is a,
a≦b
It is.

Because the distance (a) to the top side of the trapezoid and the length (b) of the short side of the rectangular base (10) are in this relationship, when the flap (32) capable of forming the top surface and the flap (33) capable of forming the top surface are folded inward to form the top surface of the carton, the tips of the flaps do not extend beyond the opposing ridges of the top surface, forming a rectangular top surface, and the carton can be made using an automatic box-making machine that uses the wrap-around method.

This can be seen in the example shown in Figure 7, where the flaps are folded along crease (63) and crease (62) to form a rectangular top surface without protruding beyond the opposing edges of the top surface, even when the distance (a) to the top edge of the trapezoid is maximized.

In this way, in one embodiment of a blank for a sizing-variable wrap-around carton, it is possible to form a carton with the lowest height (h) of the three stages.

Cartons formed using size-adjustable wrap-around carton blanks can be used, for example, when storing sheets of the same size with varying numbers of contents. In other words, while previously it was necessary to change product types and shapes, resulting in switching losses, this can be improved by using size-adjustable wrap-around carton blanks according to the present invention, making it possible to handle small lots and a wide variety of products.

In this way, the present invention makes it possible to provide blanks for wrap-around cartons that are suitable for use with wrap-around type automatic box-making machines and allow the height of the carton to be changed without changing the shape.

10: Rectangle on the bottom 20: Rectangular flap 21: Rectangular flap 22: Rectangular flap 23: Rectangular flap 30: Flap capable of forming top surface 31: Flap capable of forming top surface 32: Flap capable of forming top surface 33: Flap capable of forming top surface 50: Fold line 51: Fold line 52: Fold line 53: Fold line 60: Fold line 61: Fold line 62: Fold line 63: Fold line 70: Fold line 71: Fold line 72: Fold line 73: Fold line 80: Fold line 81: Fold line 82: Fold line 83: Fold line 90: Rectangle 100: Blank a: Distance to top side of trapezoid b: Length of short side h: Height

Claims (1)

A carton blank to be assembled and formed by a wrap-around type automatic box-making machine,
The carton formed is a hexahedron,
The six sides are the bottom, four sides of the body, and the top.
The blank is made of a flat material and is formed with a square outer periphery,
The blank has a rectangular bottom surface of the carton disposed in the center of the square,
The four sides of the rectangular base face directly opposite the four corners of the square,
Four rectangular flaps that form the four faces of the hexahedral body are formed continuously from the four sides of the rectangular bottom via fold lines,
The four rectangular flaps are further connected to flaps that can be folded inward from four sides to form a top surface,
The two flaps that can form the top surface are isosceles triangles with right-angled vertices at the corners of the square on the short side of the rectangular base , and the two flaps that can form the top surface are trapezoids with the right-angled vertices of the isosceles triangles with the right-angled vertices at the corners of the square on the long side of the rectangular base, with the right-angled vertices being truncated,
The four rectangular flaps forming the four faces of the hexahedral body have a plurality of fold lines parallel to and equidistant from the fold lines of the four sides of the bottom face of the connected rectangle ,
Among the four rectangular flaps forming the four faces of the hexahedral body, a pair of opposing flaps have small flaps provided continuously with each other via the fold lines at both side ends of a rectangle surrounded by the multiple fold lines and the sides of the flaps,
Among the small flaps, the tip of the outermost small flap is provided so as to be on the same line as the outer periphery of the square or to be inside thereof,
When the length of the short side of the rectangular bottom is b, and the distance from the fold line closest to the long side of the rectangular bottom of the flap that is continuous with the long side of the rectangular bottom to the top side of the trapezoid is a,
a≦b
And,
This blank is used to fold inward any of a plurality of fold lines that are parallel to and equidistant from the four sides of the rectangular bottom surface of the blank, forming the top surface, and is characterized in that it is possible to produce a plurality of types of hexahedral cartons with different heights.

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