Blank Sheet

Abstract

To provide a blank sheet comprising an inner flap overlapped with an edge part of an inclined wall in a state of a packing box, that is processable from a raw stock sheet.SOLUTION: A blank sheet S comprises a trunk part area S10, and a lid part area S20 continuously provided to the trunk part area S10. In the trunk part area S10, end walls 11, 12 and side walls 13, 14 are parallelly arranged, and inclined walls 15 are formed between the end walls 11, 12 and the side walls 13, 14 that are adjacent to each other. Inner flaps 30 and outer flaps 40 are formed in the lid part area S20. inclination angle parts 35 overlapped with edge parts of the inclined walls 15 are formed in the inner flaps 30 in a state of a packing box. Recesses 51 comprising a pair of edge parts parallelly opposed to each other across extension lines of boundary lines between the end walls 11, 12 and the inner flaps 30 are formed at connection parts 50 with edge parts of inclined edge parts 36 and the inclined walls 15 at the inclination angle parts 35.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a blank sheet for forming a packaging box. [Background technology]

[0002] An example of a cardboard packaging box is one that has a rectangular cylindrical body and upper and lower lids provided at upper and lower openings of the body, with the body having front and rear end walls, left and right side walls, and inclined walls formed between adjacent end walls and side walls.

[0003] In such a packaging box, the load-bearing capacity of the body against loads from above and below can be increased by arranging the inclined walls at the corners of the body. In addition, the circumference of the body of the above-mentioned packaging box is shorter than that of a body that is rectangular in plan view, so manufacturing costs can be reduced. Furthermore, when the above-mentioned packaging boxes are displayed in a sales area, customers can clearly see the product information printed on the outer surface of the inclined walls from an oblique direction.

[0004] The lid portion of the above-mentioned packaging box is formed by overlapping an outer flap connected to the side wall onto the outer surface of an inner flap connected to the end wall, and is configured so that the corners of the outer flap overlap the upper and lower edges of the inclined wall (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3210840 Summary of the Invention [Problem to be solved by the invention]

[0006] In the blank sheet for the conventional packaging box described above, the edge of the inclined wall and the edge of the corner of the outer flap meet at an acute angle. In this configuration, when processing the raw sheet into a blank sheet, it is difficult to neatly cut out the acute corner.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems and to provide a blank sheet which has inner flaps which overlap the edges of the inclined walls when in a packaging box and which can be easily processed from an original sheet. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a blank sheet for forming a packaging box, comprising a body region extending in the left-right direction and a lid region connected to an edge in the up-down direction of the body region. In the body region, four end walls and side walls are arranged alternately in the left-right direction, and at least one inclined wall is formed between the end wall and the side wall adjacent to each other. In the lid region, a flap connected to the end wall is formed, and an inclined corner portion is formed in the flap, which overlaps with the edge of the inclined wall in the state of the packaging box. In the state of the packaging box, the inclined corner portion is formed so as to protrude outward from the outer surface of the inclined wall. The inclined corner portion is formed with an inclined edge portion inclined with respect to the side edge portion and the base end edge portion of the flap. At the connection portion between the edge portion of the inclined wall and the inclined edge portion, a recess portion is formed having a pair of edges that face each other in parallel across an extension line of the boundary line between the end wall and the flap. In the state of the packaging box, the recessed portion is closed by overlapping the pair of edges. The distance between the pair of edges of the recess is greater than the thickness of the blank sheet.

[0009] In the blank sheet of the present invention, a linear recess is formed at the connection between the edge of the inclined wall and the inclined edge of the flap, and no acute corner is formed at the connection. In this way, by forming a linear gap at the connection between the edge of the inclined wall and the inclined edge of the inner flap, the connection between the edge of the inclined wall and the inclined edge of the inner flap can be neatly cut out when processing the blank sheet from the original sheet.

[0010] In a packaging box formed from the blank sheet of the present invention, the inclined corners of the flaps overlap the edges of the inclined walls, so that the flaps are supported by the inclined walls, increasing the load-bearing capacity of the packaging box against loads from above and below. In addition, in a packaging box formed from the blank sheet of the present invention, the inclined corners of the flap overlap the edges of the inclined walls, and the corners of the opening of the body are securely sealed by the flap, thereby improving airtightness. In addition, by making the inclined corner portion protrude outward from the outer surface of the inclined wall, the inclined corner portion of the flap can be reliably overlapped with the edge of the inclined wall. can.

[0011] In the blank sheet described above, it is preferable that an outer flap is formed in the lid region so as to be continuous with the side wall, and that the outer flap is overlapped on the outer surface of the flap when the blank sheet is in the packaging box state. In this configuration, the outer flap presses the flap into the body, and as a result, the left and right edges of the flap support the inner surfaces of the left and right side walls, respectively, preventing deformation of the body.

[0012] In the blank sheet, it is preferable that the bottom of the recess is curved in an arc shape so as to be convex outward. Also, in the blank sheet, it is preferable that the connection portion between the inclined edge portion and the edge of the recess is curved in an arc shape so as to be convex outward. In these configurations, when processing the original sheet into a blank sheet, it becomes easier to neatly cut out the connection between the edge of the inclined wall and the inclined edge of the inner flap. In the present invention, the arc shape is preferably a part of a circumference, but it is not limited to a part of a circumference as long as it is curved to an extent that makes it easier to cut out cleanly when processing the original sheet into a blank sheet. Effect of the Invention

[0013] In the present invention, a linear gap is formed at the connection between the edge of the inclined wall of the blank sheet and the inclined edge of the flap, so that the blank sheet can be neatly cut out from the original sheet. Also, in a packaging box formed from the blank sheet of the present invention, the flap overlaps the edge of the inclined wall, so that the load resistance against the load from above and below is increased and the airtightness can be improved. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a diagram showing a blank sheet according to the embodiment of the present invention. [Diagram 2] FIG. 2 is a partially enlarged view showing a blank sheet according to the embodiment of the present invention. [Diagram 3] 1 is a perspective view of a packaging box formed from a blank sheet according to an embodiment of the present invention, viewed from the upper right front side. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the front, back, left and right directions are defined for the convenience of describing the blank sheet and packaging box of this embodiment, and do not limit the configuration or usage of the blank sheet and packaging box.

[0016] The blank sheet S of this embodiment is formed by cutting out a sheet made of cardboard, as shown in Fig. 1. The blank sheet S shown in Fig. 1 is arranged so that the inner side is visible. The packaging box 1 of this embodiment (see FIG. 3) can be formed by mountain-folding or valley-folding the blank sheet S at each fold line.

[0017] Each crease (fold line) of the blank sheet S is a linear groove (crease) formed by pressing the surface of the blank sheet S. Incidentally, the lines may be provided with intermittent slits, which makes it easier to fold the blank sheet S at the lines.

[0018] The blank sheet S includes a body region S10 extending in the left-right direction in FIG. 1, and upper and lower lid regions S20, S20 respectively connected to upper and lower edges of the body region S10 in FIG.

[0019] In the body region S10, from left to right in FIG. 1, a first side wall 13, a first end wall 11, a first inclined wall 15, a second side wall 14, a second end wall 12, a second inclined wall 15, and a joining piece 16 are formed in this order. In this manner, in the body region S10, the end walls 11, 12 and the side walls 13, 14 are arranged alternately in the left-right direction, and the inclined walls 15 are formed between the adjacent end walls 11, 12 and side walls 13, 14.

[0020] The first side wall 13 is formed in a quadrangle, and the first end wall 11 is connected to the right edge of the first side wall 13 via a folding line. The first end wall 11 is formed in a quadrangle, and a first inclined wall 15 is connected to the right edge of the first end wall 11 via a fold line. The first inclined wall 15 is formed in a rectangle along the right edge of the first end wall 11. The second side wall 14 is connected to the right edge of the first inclined wall 15 via a fold line.

[0021] The second side wall 14 has the same shape as the first side wall 13, and the second end wall 12 is connected to the right edge of the second side wall 14 via a fold line. The second end wall 12 has the same shape as the first end wall 11, and a second inclined wall 15 is connected to the right edge of the second end wall 12 via a folding line. The second inclined wall 15 has the same shape as the first inclined wall 15, and a joint piece 16 is connected to the right edge of the second inclined wall 15 via a folding line. The joint piece 16 is a strip-shaped portion formed along the right edge of the second inclined wall 15.

[0022] When the body region S10 of the blank sheet S is folded along each fold line and the joining piece 16 is joined to the inner surface of the first side wall 13, as shown in Figure 3, the end walls 11, 12, both side walls 13, 14 and both inclined walls 15, 15 form a hexagonal cylindrical body 10 when viewed in a plane. In the body 10 of this embodiment, a first end wall 11 is disposed at the front end, and a second end wall 12 is disposed at the rear end. In addition, in the body 10, a first side wall 13 is disposed at the left side, and a second side wall 14 is disposed at the right side. In addition, in the body 10, a first inclined wall 15 is disposed at the front right corner, and a second inclined wall 15 is disposed at the rear left corner.

[0023] The upper lid region S20 of the blank sheet S shown in FIG. 1 constitutes the upper lid 20 that closes the upper opening of the body 10 shown in FIG. 1, the upper lid region S20 is formed with two inner flaps 30, 30 connected via fold lines to the upper edge of the first end wall 11 and the upper edge of the second end wall 12. The upper lid region S20 is also formed with two outer flaps 40, 40 connected via fold lines to the upper edge of the first side wall 13 and the upper edge of the second side wall 14.

[0024] The inner flap 30 connected to the upper edge of the first end wall 11 is a portion that covers the front part of the upper opening of the body 10 (see FIG. 3). The inner flap 30 connected to the upper edge of the second end wall 12 is a portion that covers the rear part of the upper opening of the body 10 (see FIG. 3).

[0025] The outer flap 40 connected to the upper edge of the first side wall 13 is a portion that covers the left half of the upper opening of the body 10 (see FIG. 3). The outer flap 40 connected to the upper edge of the second side wall 14 is a portion that covers the right half of the upper opening of the body 10 (see FIG. 3).

[0026] When assembling the upper lid 20 shown in Fig. 3, after assembling the body 10, the inner flaps 30, 30 are folded inward relative to both end walls 11, 12. Next, the outer flaps 40, 40 are folded inward relative to both side walls 13, 14, and the outer flaps 40, 40 are placed on the upper surfaces of the inner flaps 30, 30. In this manner, the upper lid 20 is formed by the inner flaps 30, 30 and the outer flaps 40, 40.

[0027] In the upper lid portion 20 of this embodiment, the leading edges of the inner flaps 30, 30 are arranged with a gap between them in the front-rear direction. Also, the leading edges of the outer flaps 40, 40 are butted against each other at the center of the upper opening of the body portion 10 in the left-right direction.

[0028] In the upper lid portion 20, the front edges of the outer flaps 40, 40 and the upper edge of the first end wall 11 are spaced apart in the front-to-rear direction, and the front inner flap 30 is exposed in the gap. Similarly, the rear edges of the outer flaps 40, 40 and the upper edge of the second end wall 12 are spaced apart in the front-to-rear direction, and the rear inner flap 30 is exposed in the gap.

[0029] In the blank sheet S shown in Fig. 1, the left edge 31 and right edge 32 of the inner flap 30 connected to the upper edge of the first end wall 11 are disposed perpendicular to the base end edge 33. The left edge 31 of the inner flap 30 is disposed slightly to the right of the position of the left edge 11a of the first end wall 11. The right edge 32 of the inner flap 30 is disposed to the right of the right edge 11b of the first end wall 11. In this way, the inner flap 30 protrudes to the right (towards the inclined wall 15) of the right edge 11b of the first end wall 11.

[0030] An inclined corner 35 is formed at the lower right corner of the inner flap 30. An inclined edge 36 that is inclined with respect to the right edge 32 and the base edge 33 is formed at the tip edge of the inclined corner 35.

[0031] 3, the inclined corner portion 35 of the inner flap 30 is a portion that overlaps with the upper edge portion 15a of the first inclined wall 15 when the packaging box 1 is assembled. In this embodiment, the inclined corner portion 35 of the inner flap 30 is configured to protrude outward from the outer surface of the inclined wall 15 when the packaging box 1 is assembled.

[0032] As shown in FIG. 2, an upper edge 15a of the first inclined wall 15 is disposed slightly below the upper edge of the first end wall 11 and the upper edge of the second side wall .

[0033] At a connection 50 between the upper edge 15a of the first inclined wall 15 and the inclined edge 36 of the inner flap 30, a recess 51 that is recessed linearly toward the left is formed.

[0034] The recess 51 has a pair of edges (upper edge 51a and lower edge 51b) that face each other across an extension line L2 of the boundary line L1 between the first end wall 11 and the inner flap 30. The lower edge 51b of the recess 51 and the upper edge 15a of the first inclined wall 15 are continuous in a straight line. A connection portion 53 between the inclined edge portion 36 of the inner flap 30 and the upper edge portion 51a of the recessed portion 51 is curved in an arc shape so as to be convex toward the outside (downward).

[0035] The recessed portion 51 is disposed on an extension line L2 of the boundary line L1 between the first end wall 11 and the inner flap 30. The extension line L2 of the boundary line L1 between the inner flap 30 and the first end wall 11 is disposed in the center of the vertical interval of the recessed portion 51. The vertical width of the recessed portion 51 is not limited, but is formed slightly larger than the thickness of the blank sheet S in this embodiment.

[0036] A bottom 52 (left end) of the recess 51 is disposed at the position of the left edge of the first inclined wall 15. In other words, the recess 51 does not protrude leftward (toward the first end wall 11) beyond the left edge of the first inclined wall 15. An upper edge 51a and a lower edge 51b of the recess 51 are continuous via an arc-shaped edge. In other words, the bottom 52 of the recess 51 is curved in an arc-like shape so as to be convex outward.

[0037] 1, the inner flap 30 connected to the upper edge of the second end wall 12 has the same shape as the inner flap 30 connected to the upper edge of the first end wall 11. The inner flap 30 connected to the upper edge of the second end wall 12 also has an inclined corner 35. Furthermore, a recess 51 that is recessed linearly toward the left is also formed at a connection 50 between the upper edge 15a of the second inclined wall 15 and the inclined edge 36 of the inner flap 30.

[0038] In the blank sheet S of this embodiment, the upper lid region S20 and the lower lid region S20 are formed symmetrically from top to bottom. The lower lid region S20 constitutes the lower lid 20 that closes the lower opening of the body 10 shown in FIG.

[0039] As shown in FIG. 1, in the lower lid region S20, two inner flaps 30, 30 are formed connected to the lower edge portions of both end walls 11, 12, respectively, and two outer flaps 40, 40 are formed connected to the lower edge portions of both side walls 13, 14, respectively. In the lower lid region S20, a connection 50 between the lower edge 15b of the inclined wall 15 and the inclined edge 36 of the inner flap 30 has a recess 51 that is recessed linearly toward the left.

[0040] 1, in the blank sheet S of this embodiment as described above, a linear recess 51 is formed at the connection 50 between the edge of the inclined wall 15 and the inclined edge 36 of the inner flap 30, and no acute corner is formed at the connection 50. By forming a linear gap at the connection between the edge of the inclined wall 15 and the inclined edge 36 of the inner flap 30 in this manner, the connection 50 between the edge of the inclined wall 15 and the inclined edge 36 of the inner flap 30 can be neatly cut out when processing the blank sheet S from the original sheet.

[0041] 2, in the blank sheet S, the bottom 52 of the recess 51 is curved in an arc shape, and the connection 53 between the inclined edge 36 of the inner flap 30 and the edge of the recess 51 is curved in an arc shape. In this way, when processing the blank sheet S from the original sheet, it becomes easier to neatly cut out the connection 50 between the inclined wall 15 and the inner flap 30.

[0042] In the packaging box 1 formed from the blank sheet S of this embodiment, as shown in Fig. 3, the inclined corner portion 35 of the inner flap 30 overlaps with the edge portion of the inclined wall 15. Furthermore, in this embodiment, the inclined corner portion 35 of the inner flap 30 protrudes outward beyond the outer surface of the inclined wall 15.

[0043] In such a packaging box 1, the inner flap 30 is supported by the inclined wall 15, and the outer flap 40 is overlapped on the outer surface of the inner flap 30, thereby increasing the load resistance against loads from above and below. In addition, in the packaging box 1, the inclined corner portion 35 of the inner flap 30 overlaps the edge of the inclined wall 15, and the corner of the opening of the body portion 10 is securely sealed by the inner flap 30, thereby improving airtightness.

[0044] In addition, in the packaging box 1, the inner flap 30 is pushed into the body 10 by the outer flap 40, and as a result, the inner surfaces of the left and right side walls 13, 14 are supported by the left and right edges of the inner flap 30, respectively, thereby preventing deformation of the body 10.

[0045] Although the present embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention. In the blank sheet S of this embodiment, as shown in Figure 2, the bottom 52 of the recess 51 does not protrude toward the first end wall 11 further than the side edge of the first inclined wall 15, but if necessary, the bottom 52 of the recess 51 may be made to protrude toward the first end wall 11 further than the side edge of the first inclined wall 15.

[0046] In the blank sheet S of this embodiment, as shown in FIG. 1, the upper and lower lid regions S20, S20 are formed symmetrically above and below, but the configuration of the lid region of the present invention may be applied to only one of the upper and lower lid regions S20, S20.

[0047] In the blank sheet of the present invention, the width and height of the end walls, side walls and inclined walls are not limited, the number of inclined walls is not limited, and the inclination angle of the inclined walls relative to the end walls and side walls is not limited. For example, in the blank sheet S of this embodiment, both end walls 11, 12, both side walls 13, 14 and both inclined walls 15, 15 may be formed to have the same width, so that the body 10 of the packaging box 1 (see FIG. 3) is formed into a regular hexagon. In addition, it is also possible to provide three inclined walls on the blank sheet to form the body of the packaging box into a pentagon, or to provide four inclined walls on the blank sheet to form the body of the packaging box into an octagon.

[0048] The blank sheet S in this embodiment is made of corrugated cardboard, but the packaging box of the present invention can be formed from various known paperboards. [Explanation of symbols]

[0049] 1 packaging box 10. Torso 11 First end wall 11a Left edge 11b Right edge 12 Second end wall 13 First Side Wall 14 Second Side Wall 15 Slanted wall 15a Upper edge 15b Lower edge 16 Joint piece 20 Lid 30 Inner flap 31 Left edge 32 Right edge 33 Base edge 35 Inclined corner part 36 Sloping Edge 40 Outer flap 50 Connection 51 Recess 51a Upper edge 51b Lower edge 52 Bottom 53 Connection L1 border L2 extension line S Blank Sheet S10 Torso Region S20 Lid area

Claims

1. A blank sheet for forming a packaging box, a torso region extending in a left-right direction; A lid region connected to the upper and lower edges of the body region, In the body region, four end walls and four side walls are arranged alternately in the left-right direction, and at least one inclined wall is formed between the end wall and the side wall adjacent to each other, A flap is formed in the lid region and is connected to the end wall, The flap is formed with an inclined corner portion that overlaps with an edge portion of the inclined wall in the state of the packaging box, The inclined corner portion is formed with an inclined edge portion that is inclined with respect to the side edge portion and the base edge portion of the flap, In the state of the packaging box, the inclined corner portion is formed so as to protrude outward beyond an outer surface of the inclined wall, A recess is formed at a connection between the edge of the inclined wall and the inclined edge, the recess having a pair of edges facing each other in parallel across an extension line of the boundary line between the end wall and the flap; In the state of the packaging box, the recessed portion is closed by overlapping the pair of edges, A blank sheet, characterized in that the distance between the pair of edges of the recess is formed to be greater than the thickness of the blank sheet.

2. 2. The blank sheet according to claim 1, An outer flap is formed in the lid region and is connected to the side wall, The blank sheet is characterized in that the outer flap is overlapped on the outer surface of the flap when the packaging box is in the state of being.

3. 3. The blank sheet according to claim 1 or 2, A blank sheet, wherein the bottom of the recess is curved in an arc shape so as to be convex toward the outside of the recess.

4. The blank sheet according to any one of claims 1 to 3, A blank sheet, characterized in that the connection portion between the inclined edge portion and the edge portion of the recessed portion is curved in an arc shape so as to protrude outward.

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