Variable size wrap-around carton blanks

Abstract

To provide a blank for a size-variable wraparound carton, having suitability to a wraparound type automatic carton former, and allowing height change of the carton without mold replacement.SOLUTION: A blank has a rectangular carton bottom face arranged at the center of a square. From four sides of the bottom face, four rectangular flaps forming four faces of the body of a hexahedron are continuously formed via folding ruled lines. Flaps capable of further continuously forming a top face when folded inward from four sides, continues from the four rectangular flaps. Assuming a short side length of a rectangle of the bottom face as b, and assuming a distance from the folding rules line nearest to a long side of the rectangle of the bottom face, out of the multiple folding ruled lines parallel to the long side of the flaps continuous to the long side of the rectangle of the bottom face as a, a≤b is satisfied.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a carton that is compatible with a wrap-around type automatic box-making machine, and in particular to a blank for a size-adjustable wrap-around carton that allows the packaging size to be changed without changing the type or product. [Background technology]

[0002] Generally, a carton is a paper container, for example, made of blanks such as paperboard or corrugated cardboard assembled into a three-dimensional box shape capable of storing contents, and is in widespread use.

[0003] The wrap-around method is particularly productive and is commonly used in automatic carton making machines. Among them, when using blanks called "Yakko type" (Tato type), it is particularly suitable for packaging thin products or as packaging material for products with different quantities.

[0004] 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 of insufficient strength, and the carton cannot be used with wrap-around type automatic box-making machines, so its applications are limited. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 3-035019 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a blank for a size-adjustable 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. [Means for solving the problem]

[0007] 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 sides of the hexahedral body are formed continuously from the four sides of the rectangular base via fold lines. The four rectangular flaps are joined by flaps that can be folded inward from all four sides to form the top surface. The flaps that can form the top surface are isosceles triangles with right-angled vertices at the corners of the square on the two short sides of the rectangular bottom surface, and are trapezoids with the right-angled vertices of the isosceles triangles with the right-angled vertices at the corners of the square on the two long sides of the rectangular bottom surface, with the right-angled vertices cut off, The four rectangular flaps that form the four sides of the hexahedral body have multiple folds that are parallel to the fold lines of the four sides of the bottom rectangle and equidistant from the fold lines of the four sides. There are numbered fold lines on each flap, Among the four rectangular flaps forming the four faces of the hexahedral body, a pair of opposing flaps has small flaps provided continuously through the fold lines at both side ends of a rectangle surrounded by the parallel 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 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 top side of the trapezoid, is a, a≦b And, This blank is a size-variable wrap-around carton blank, characterized in that it is possible to make multiple types of six-sided cartons of different heights 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 sides of the body of the six-sided carton, thereby forming the top surface. Effect of the Invention

[0008] According to the present invention, it is possible to provide a blank for a size-adjustable wrap-around carton that is suitable for a wrap-around type automatic carton making machine and allows the height of the carton to be changed without changing the shape.

[0009] In other words, the blank is made of a flat material and is formed with a square as its outermost circumference, with the rectangular bottom surface of the carton positioned in the center of the square, and the four sides of the rectangular bottom surface facing directly toward the four corners of the square.As a result, when the Yakko-shaped blank is made into a carton, the four corners of the square are also folded in relative positions when the flaps that form the top surface are folded in, resulting in a pleasing design.

[0010] Furthermore, a blank having a square outermost periphery can reduce the loss of material used to form the blank.

[0011] In addition, the two flaps that can form the top surface are isosceles triangles with right-angled vertices at the corners of the square, and the two flaps on the long sides of the rectangular base surface are trapezoids with the vertices of an isosceles triangle cut off, with the corners of the square as right-angled vertices, and the four rectangular flaps that form the four sides of the body of the hexahedron have multiple fold lines pre-formed on each flap that are parallel to and equidistant from the fold lines of the four sides of the rectangular base surface to which they are connected.Therefore, 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.

[0012] In other words, it is possible to provide a blank for a size-variable wrap-around carton, which can be changed in size without changing the type or product type in a wrap-around type automatic box-making machine.

[0013] This can be used, for example, when storing contents of the same size but with different numbers of sheets. In other words, by using the size-adjustable wrap-around carton blank according to the present invention, it becomes possible to handle small lots and a wide variety of products.

[0014] Furthermore, of the four rectangular flaps that form the four sides of the body of the hexahedron, a pair of opposing flaps have small flaps that are continuous with each other via fold lines at both side edges of the rectangle surrounded by the parallel fold lines and sides of the flaps. This makes it possible to seal the ridges of the body of the assembled hexahedral carton and is also effective in increasing the strength of the hexahedron.

[0015] In addition, the tip of the outermost small flap is located on the same line as the outer periphery of the square or further inside, so that the wrap-around method can 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 loss of blank material when punching out the blank.

[0016] 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 top 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. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic plan view of a blank for explaining one embodiment of a blank for a size-adjustable wrap-around carton according to the present invention. [Diagram 2] 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-adjustable wrap-around carton according to the present invention. [Diagram 3] FIG. 3 is a schematic plan view of a blank for illustrating details of flaps constituting the blank in one embodiment of a blank for a size-variable wrap-around carton according to the present invention. [Figure 4] FIG. 4 is a schematic plan view of one embodiment of a blank for a size-variable wrap-around carton according to the present invention, for illustrating the characteristic portions and dimensions of the present invention in more detail. [Diagram 5] FIG. 5 is a schematic perspective view illustrating a state in which a blank for a size-adjustable wrap-around carton according to one embodiment of the present invention is assembled by folding the carton to a high height at the third fold line. [Figure 6] FIG. 6 is a schematic perspective view illustrating one embodiment of a size-adjustable wrap-around carton blank according to the present invention, illustrating how the carton is folded to the middle height at the second fold line and assembled. [Figure 7]FIG. 7 is a schematic perspective view illustrating a state in which a blank for a size-adjustable wrap-around carton according to one embodiment of the present invention is assembled by folding the carton to a low height at the first fold line. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present invention will be described in more detail below with reference to Figs. 1 to 7. However, the present invention is not limited to the examples shown here. The present invention is defined by the claims.

[0019] FIG. 1 is a schematic plan view of a blank for explaining one embodiment of a wrap-around carton according to the present invention.

[0020] 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 by this is a six-sided shape. The six sides are the bottom, four sides of the body, and the top, for a total of six sides. The blank (100) is made of paperboard or corrugated cardboard. In this specification, the term carton includes boxes made of paperboard and corrugated cardboard.

[0021] 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 board, the cartons are folded along creases, flaps are folded in, and other steps to assemble the blanks into a three-dimensional shape, which is then glued together and assembled automatically.

[0022] The present invention proposes a blank (100) for use in this wrap-around type automatic carton making machine, and provides a blank for a size-adjustable wrap-around carton that can make cartons of different heights without changing the shape.

[0023] The example of the blank shown in Fig. 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 called a "Yacko" type. The blank (100) can be made of cardboard, paperboard, etc.

[0024] The blank (100) has the rectangular bottom surface (10) of the carton placed in the center of the square (90), with the four sides of the rectangular bottom surface (10) directly facing the four corners of the square (90).

[0025] The bottom rectangle (10) is the portion surrounded by creases (50), (51), (52), and (53). As can be seen from the example shown in Figure 1, the short sides of the rectangle are creases (50) and (51), and the long sides of the rectangle are creases (52) and (53).

[0026] The four sides of the rectangular bottom surface (10) are continuously formed with flaps that can form the four sides of the hexahedral body and a flap that can form the top surface, and are continuous via fold lines (50), (51), (52), and (53).

[0027] In the example shown in Fig. 1, the flaps on the four sides of the hexahedral body are rectangular portions with halftone dots. The size-adjustable wrap-around carton blank of the present invention is intended to enable a wrap-around type automatic box-making machine to make cartons of different heights without changing product types or shapes by providing multiple fold lines in advance on the flaps on the four sides of the hexahedral body.

[0028] 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-adjustable wrap-around carton according to the present invention.

[0029] As described above, the blank (100) has the rectangular bottom surface (10) of the carton disposed in the center of the square (90), and the four sides of the rectangular bottom surface (10) directly face the four corners of the square (90). In the example shown in Figure 2, the four corners of the square (90) are shown disposed vertically and horizontally.

[0030] Four flaps, namely rectangular flap (20), rectangular flap (21), rectangular flap (22), and rectangular flap (23), which form the four faces of the hexahedral body, are formed continuously from the four sides of the rectangular bottom surface (10) via fold lines.

[0031] In the example shown in Figure 2, the flaps on the four sides of the hexahedral body are dotted in four places. It is a rectangular part of.

[0032] That is, the rectangular flap (20) is continuous with the rectangular bottom surface (10) via the fold line (50).

[0033] Similarly, the rectangular flap (21) is continuous with the bottom rectangle (10) via a fold line (51).

[0034] Similarly, the rectangular flap (22) is continuous with the bottom rectangle (10) via a fold line (52).

[0035] Similarly, the rectangular flap (23) is continuous with the bottom rectangle (10) via a fold line (53).

[0036] 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.

[0037] That is, the flap (30) capable of forming a top surface is continuous with the rectangular flap (20).

[0038] Similarly, a flap (31) capable of forming a top surface is folded continuously to the rectangular flap (21).

[0039] Similarly, a flap (32) capable of forming a top surface is continuous with the rectangular flap (22).

[0040] Similarly, a flap (33) capable of forming a top surface is continuous with the rectangular flap (23).

[0041] These four flaps that can 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.

[0042] The flaps capable of forming the top surface are the flap (30) capable of forming the top surface on the short side of the rectangular base surface (10), and the two flaps (31) capable of forming the top surface, which are in the form of an isosceles triangle with the corners of a square (90) as right-angled vertices.

[0043] In addition, the two flaps (32) capable of forming the top surface and (33) capable of forming the top surface on the long side of the rectangular base surface (10) are formed into a trapezoid with the apex of an isosceles triangle cut off, with the corner of the square (90) as the right angle apex.

[0044] Cutting off this 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 dimensional specifications will be described later in the explanation of Figure 4.

[0045] Of the four rectangular flaps forming the four faces of the hexahedral body, a pair of opposing flaps have small flaps (40) provided continuously through the fold lines at both ends of a rectangle surrounded by the fold lines and the sides of the flaps.

[0046] In the example shown in FIG. 2, a rectangular flap (20) connected to the short side of the rectangular bottom (10) and a small flap (40) are provided on the rectangular flap (21) opposite thereto.

[0047] In the example shown in Fig. 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.

[0048] FIG. 3 is a schematic plan view of a blank for illustrating details of flaps constituting the blank in one embodiment of a blank for a size-variable wrap-around carton according to the present invention.

[0049] The four rectangular flaps that form the four faces of the hexahedral body have multiple fold lines that are parallel to the fold lines of the four sides that form the connected bottom rectangle (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.

[0050] In the example shown in FIG. 3, the flaps on the four sides of the hexahedral body are four rectangular portions with halftone dots.

[0051] The fold lines on the four sides of the connected bottom rectangle (10) are the boundary lines with each flap, and there are four fold lines: fold line (50), fold line (51), fold line (52), and fold line (53).

[0052] That is, the rectangular flap (20) on the short side has three fold lines, namely, fold line (60), fold line (70), and fold line (80), in that order from the side closest to the rectangular bottom surface (10).

[0053] Similarly, the rectangular flap (21) on the opposing short side has three fold lines, namely, a fold line (61), a fold line (71), and a fold line (81), in that order from the side closest to the bottom rectangle (10).

[0054] The rectangular flap (22) on the long side has three fold lines, namely, a fold line (62), a fold line (72), and a fold line (82), in that order from the side closest to the rectangular bottom surface (10).

[0055] Similarly, the rectangular flap (23) on the opposing short side has three fold lines, namely, fold line (63), fold line (73), and fold line (83), in that order from the side closest to the bottom rectangle (10).

[0056] The flaps have a number of fold lines, and when the flaps are folded to form the top surface, any one of the fold lines is selected and folded, allowing the height of the carton to be produced to be selectively determined.

[0057] In the example shown in FIG. 3, each rectangular flap has three fold lines, so that cartons of three different heights can be produced by selecting the fold lines to be used.

[0058] The size-adjustable wrap-around carton blank of the present invention has multiple fold lines pre-defined on the four flaps of the hexahedral body, making it possible to form cartons of different heights in a wrap-around type automatic carton-making machine without changing shapes.

[0059] FIG. 4 shows an embodiment of a blank for a variable size wrap-around carton according to the present invention. FIG. 2 is a schematic plan view of a blank for illustrating the characteristic portions and dimensions of the present invention in more detail.

[0060] In the example shown in FIG. 4, of the four rectangular flaps forming the four faces of the hexahedral body, a pair of opposing flaps have small flaps (40) provided continuously, via the fold lines, on both side ends of a rectangle surrounded by the parallel fold lines and the sides of the flaps.

[0061] In the example shown in FIG. 4, the four rectangular flaps that form the four faces of the hexahedral body are rectangular portions that are dotted.

[0062] In the example shown in FIG. 4, small flaps (40) are provided on a rectangular flap (20) connected to the short side of the rectangular bottom surface (10) and on a rectangular flap (21) opposite the rectangular flap (20).

[0063] In the example shown in Fig. 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.

[0064] 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 using the wrap-around method. Therefore, as shown in FIG. 4, the tip of the outermost small flap (40) among the small flaps (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 carried out smoothly using the wrap-around method without interfering with it.

[0065] In addition, since the outermost periphery of the blank (100) is a square (90), it is possible to reduce loss of material of the blank (100) when forming the blank (100).

[0066] 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) that are parallel to the long side, to the top side of the trapezoid is a, a≦b It is.

[0067] 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.

[0068] Because the distance (a) to the top side of the trapezoid and the length (b) of the short side of the rectangular base (10) satisfy 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 formed using a wrap-around type automatic box-making machine.

[0069] 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 side of the trapezoid is maximized.

[0070] FIG. 5 is a schematic perspective view illustrating a state in which a blank for a size-adjustable wrap-around carton according to one embodiment of the present invention is assembled by folding the carton to a high height at the third fold line.

[0071] The example shown in Figure 5 is an example of assembling a carton to a higher variable height, in which 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).

[0072] 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). By folding the four flaps inward in this manner, a rectangular top surface of the carton can be formed.

[0073] Therefore, in this case, in one embodiment of the variable size wrap-around carton blank, it is possible to form a carton having the highest height (h) of the three stages.

[0074] FIG. 6 is a schematic perspective view illustrating one embodiment of a size-adjustable wrap-around carton blank according to the present invention, illustrating how the carton is folded to the middle height at the second fold line and assembled.

[0075] The example shown in Figure 6 is an example of assembling a carton with a medium variable height, in which triangular top-forming flap (30) is folded in at crease (70), and triangular top-forming flap (31) is folded in at crease (71).

[0076] 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). By folding the four flaps inward in this manner, a rectangular top surface of the carton can be formed.

[0077] Therefore, in this case, in one embodiment of the blank for a size-variable wrap-around carton, it is possible to form a carton having a medium height (h) among the three stages.

[0078] FIG. 7 is a schematic perspective view illustrating a state in which a blank for a size-adjustable wrap-around carton according to one embodiment of the present invention is assembled by folding the carton to a low height at the first fold line.

[0079] The example shown in Figure 7 is an example of assembling a carton to a higher variable height, in which 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).

[0080] Furthermore, the trapezoidal flap (32) capable of forming the top surface is folded in along the fold line (62), and the flap (33) capable of forming the top surface is folded in along the fold line (63). By folding the four flaps inward in this manner, a rectangular top surface of the carton can be formed.

[0081] 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.

[0082] Because the distance (a) to the top side of the trapezoid and the length (b) of the short side of the rectangular base (10) satisfy 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 formed using a wrap-around type automatic box-making machine.

[0083] This can be seen in the example shown in FIG. 7, where the flaps are folded along creases (63) and (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.

[0084] Thus, in this case, in one embodiment of a variable size wrap-around carton blank, it is possible to form a carton with the lowest height (h) of the three stages.

[0085] A carton formed using a size-adjustable wrap-around carton blank can be used, for example, when storing sheets of the same size with different numbers of contents. In other words, while in the past it was necessary to change the product type and the type, resulting in switching losses, this can be improved by using the size-adjustable wrap-around carton blank of the present invention, making it possible to handle small lots and a wide variety of products.

[0086] In this way, according to the present invention, it is possible to provide a blank for a size-adjustable 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. [Explanation of symbols]

[0087] 10. Bottom rectangle 20. Rectangular flap 21 Rectangular flap 22 Rectangular flap 23 Rectangular flap 30....Flap that can form the top surface 31....Flap that can form top surface 32....Flap that can form top surface 33....Flap that can form 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...square 100...Blank a: Distance to the top side of the trapezoid b Length of short side h height

Claims

[Claim 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.

Images