JP2010149927A - Packing box with unpacking function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing box with an unpacking function in a simple structure that can easily be unpacked with a weak force, has an unpacked safe opening edge part, and, therefore, can prevent one from being injured. <P>SOLUTION: The box is formed of a box body forming piece 12 integrally punched from a single blank sheet. The box body forming piece 12 includes side faces 14, 16, 18, and 20 connected in parallel to each other, front side half cut lines 52, 64, 66, and 90 that are formed in the side faces 16, 18, and 20 at a depth from a front side surface of the box body forming piece 12 to midway of a thickness thereof, and back side half cut lines 54, 74, 78, and 92 formed in a back side surface along the front side half cut lines 52, 64, 66, and 90 respectively. The back side half cut lines 54, 74, 78, and 92 are formed in a continuous wave shape or the like, and a decorative pattern of a continuous-wave-shaped peel-off rear surface part 106 which is formed by being cut at the back side half cut lines 54, 74, 78, and 92, can be left in the unpacked opening edge part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packaging box with an opening function in which a cutting line for opening is provided on a part of a side surface.

  2. Description of the Related Art Conventionally, some packaging boxes that store and sell products are provided with a cutting line for opening. This cutting line is referred to as a sewing line or a zipper line in which cut portions are arranged at regular intervals through uncut portions. Furthermore, in addition to the sewing machine line etc., as disclosed in Patent Documents 1 and 2, the half-cut line on the front surface and the half-cut line on the back surface are slightly shifted in parallel to each other, and along this pair of half-cut lines There is one that breaks the side of the packaging box and opens it.

  The paper box disclosed in Patent Document 1 is provided with an opening by cutting a portion to be a lid of the top plate, an outer surface half-cut line formed on the outer surface of the lid, and a lid inside the outer surface half-cut line. An inner surface half-cut line formed on the inner surface is provided, and opening is performed using delamination between the outer surface half-cut line and the inner surface half-cut line.

  The top open type paper box disclosed in Patent Document 2 is provided so that it can be opened with a stepped half-cut line composed of two adjacent parallel half-cut lines on the front surface side and the back surface side at the planned opening position of the upper surface plate, At least one of the two half-cut lines is provided by a broken half-cut line.

JP 2006-89070 A JP 2006-151464 A

  In the case of the broken line disclosed in Patent Documents 1 and 2 of the background art described above, the edge of the half-cut line that has been delaminated and broken remains on the peripheral edge of the opened opening or the peripheral edge of the lid, and the edge There was a risk of cutting their hands. In addition, the cut end portion is exposed at the broken end portion as it is, and the appearance shape is not clean and may not match the image of the stored product.

  The present invention has been made in view of the above-mentioned problems of the background art, and can be easily opened with a weak force with a simple structure, the opening edge after opening is clean, and the safety is high. The purpose is to provide a packaging box with functions.

  The present invention comprises a box-forming piece integrally punched from one blank sheet. The box-forming piece includes a side surface connected in parallel to each other, and the box-forming piece provided on the side surface. The surface half-cut line formed at a depth from the surface to the middle of the thickness, and the depth from the back surface of the box-forming piece to the middle of the thickness provided along the table half-cut line in the vicinity of the table half-cut line The back half-cut line formed is formed, the back half-cut line is formed in a predetermined decorative pattern, and the front half-cut line and the back half-cut line are broken and opened, thereby opening the opened edge portion. In the peeling back surface part, it is a packaging box with an opening function in which the decorative pattern formed by the back half-cut line is left. In the decorative pattern, the cut edge is formed in a wave shape, and a continuous wave-like peeled back surface portion is left protruding from the position of the front half-cut line.

  Moreover, the said back half-cut line is formed in a fixed waveform, and the said peeling back surface part which protrudes in the opening edge part opened becomes a uniform waveform. The back half-cut line may be anything such as an irregular waveform or a continuous semicircle.

  Further, the packaging box with an opening function is provided with a pair of front half-cut lines on the side surface, and an inner side of the pair of front half-cut lines becomes a separation band part for opening long in one direction, The back half-cut line is provided on the inner side along the front half-cut line. At the opening edge portion of the opening portion from which the separation band portion has been removed, the peeled back surface portion of the continuous curve cut by the back half-cut line protrudes from the position of the front half-cut line toward the center of the opening portion. Left behind.

  In addition, the packaging box with an opening function is assembled in a cylindrical shape by folding four side faces at right angles with a crease line, and one of a pair of side faces parallel to each other is a front half cut line which is the front half cut line. A front back half-cut line that is a line and the back half-cut line is provided substantially parallel to the connecting direction of the side surface, and a folding line is provided on the other side surface substantially parallel to the connecting direction of the side surface, A pair of parallel side surfaces that intersect the pair of side surfaces at right angles include a front surface half-cut line and a horizontal surface front half-cut line continuous to the folding line, and the back surface along the front half-cut line. A horizontal back half cut line, which is a half cut line, is provided.

  In addition, the decorative pattern is formed by the back half-cut line on the peeled back surface portion that is peeled off and cut off from the front and back of the side surface portion of the box-forming piece by the front half-cut line and the back half-cut line. The decorative pattern may remain uneven. Furthermore, the peeling back surface portion may include characters formed by the back half-cut line.

  The packaging box with an opening function of the present invention can be easily opened with a weak force with a simple structure, and the opening edge after opening remains a relatively soft peeling back surface portion having a decorative pattern such as a wavy curve. When the product is taken out from the opening edge, it is safe to touch the hand, and injury due to contact with the opening edge can be prevented. Further, when opened, a decorative pattern appears on the cut edge, and the appearance of the opening that has not been so good in the past is improved.

The perspective view (a) of the packaging box with an opening function of the first embodiment of the present invention, the perspective view (b) showing the state in the middle of removing the separation band, and the opening formed by removing the separation band They are the perspective view (c) which shows the state performed, and the perspective view (d) which shows the state opened. It is an expanded view of the packaging box with an opening function of 1st embodiment of this invention. It is a front view which shows the folded state of the packaging box with an opening function of 1st embodiment of this invention. The perspective view (a) of the packaging box with an opening function of 2nd embodiment of this invention, the perspective view (b) which shows the state in the middle of breaking a front half cut line, and the perspective view (c) which shows the opened state is there. It is an expanded view of the packaging box with an opening function of 2nd embodiment of this invention. It is the perspective view (a) of the opened state of the packaging box with an opening function of 3rd embodiment of this invention, and the perspective view (b) of the state which expanded the lid | cover further. It is the perspective view (a) of the opened state of the packaging box with an opening function of 4th embodiment of this invention, and the perspective view (b) of the state which extended the lid | cover further.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of the present invention. A packaging box 10 with an opening function of this embodiment is a box-forming piece 12 formed by punching out a single blank sheet such as paper. Is assembled and provided.
FIG. 2 is a developed view of the box-forming piece 12 as viewed from the surface. The box-forming piece 12 has side surfaces 14, 16, 18, and 20 connected in parallel to each other. The side surfaces 14, 16, 18, and 20 have the same length in the connecting width direction, and the lengths in the connecting direction are substantially equal to each other when the side surfaces 14 and 18 are long, and the side surfaces 16 and 20 are short and approximately equal to each other. . Further, a glued piece 22 that is glued to the back surface of the side face 14 in the assembled state of the unsealing packaging box 10 is provided on the side edge portion of the side face 20. The side surfaces 14, 16, 18, 20 and the glued piece 22 are divided by crease lines 24, 26, 28, 30, respectively.

  On the side surface 14, a rectangular inner upper lid piece 32 is provided at one end portion in a direction perpendicular to the connecting direction of the side surfaces, separated by a crease line 34. An inner bottom cover piece 36 is provided at the end of the side surface 14 opposite to the crease line 34 and separated by a crease line 38. On the side surface 14, a folding line 40 at the time of opening the lid is provided in parallel to the folding line 34 at a position close to the folding line 34. In the middle of the folding line 40, four short cutting lines are provided so as to be easily bent. A short cut line 42 is formed at the intersection of the fold line 40 and the crease line 24, and the cut line 42 intersects the intersection of the fold line 40 and the crease line 24, and one end is directed toward the center of the side surface 14. The other end extends obliquely upward to the side surface 16.

  A trapezoidal flap 44 is provided at the end of the side surface 16 adjacent to the crease line 34 on the side surface 14 and separated by a crease line 46. A trapezoidal flap 48 is provided at the end of the side surface 16 opposite to the crease line 46 and separated by the crease line 50. A lateral surface half-cut line 52 is provided on the side surface 16. The horizontal surface half-cut line 52 is provided by a half-cut line cut to a depth that reaches the middle of the thickness of the box-forming piece 12 from the surface of the box-forming piece 12, and from the intersection of the crease line 24 and the folding line 40, The straight line extends obliquely downward and reaches the crease line 26. A portion where the crease line 24 and the crease line 26 intersect is slightly left uncut. A horizontal back half-cut line 54 is provided slightly on the bottom side of the horizontal surface half-cut line 52. The horizontal back half cut line 54 is provided as a half cut line that is cut to a depth that reaches the middle of the thickness of the box forming piece 12 from the back surface of the box forming piece 12, and is parallel to the horizontal surface half cutting line 52. It is a straight line and is bent so as to intersect the crease line 24 at a right angle near the intersection of the crease line 24. A short back half-cut line 43 is provided along the crease line 24 from the intersection of the fold line 40 and the crease line 24, and the horizontal back half-cut line 54 reaches the middle of the short back half-cut line 43. The portion of the horizontal back half cut line 54 that intersects the crease line 26 reaches the middle of a later-described cut line 68 provided on the crease line 26.

  A rectangular outer top cover piece 56 is provided at the end of the side surface 18 adjacent to the crease line 46 of the side surface 16 and separated by a crease line 58. A rectangular outer bottom cover piece 60 is provided at the end of the side surface 18 opposite to the crease line 58 and separated by the crease line 62. On the surface side of the side surface 18, a pair of front surface half-cut lines 64 and 66 are provided across the center of the side surface 18. The front surface half-cut line 64 is provided so as to be substantially parallel to the crease line 58 and from the vicinity of the crease line 26 to the vicinity of the crease line 28, and is bent downward so that the center portion approaches the center of the side surface 18. Yes. The front surface half-cut line 66 is symmetrical with the front surface half-cut line 64 and is curved upward so that the center portion approaches the center of the side surface 18.

  The crease line 26 between the side face 16 is provided with a U-shaped cut line 68 that connects the front half-cut lines 64 and 66 on the crease line 26 side. The cutting line 68 penetrates the thickness of the box-forming piece 12, and a pair of horizontal line portions that continue through the uncut portion on the extension of the end portions of the front surface half-cut lines 64 and 66, and the horizontal line portion Is provided with a vertical line part that connects the end part slightly extending to the side surface 16 beyond the crease line 26 in parallel to the crease line 26, and the corner part between the pair of horizontal line parts and the vertical line part is rounded. It is chamfered. Similarly, the crease line 28 between the side face 20 is also provided with a U-shaped cut line 70 that connects the front side half-cut lines 64 and 66 to the ends on the crease line 28 side. The portion surrounded by the front front half-cut lines 64 and 66, the cutting line 68, and the cutting line 70 becomes a separating band portion 72 for opening that is long in one direction.

  A front back half-cut line 74 is provided on the rear surface side of the cut band 72 slightly inside the front front half cut line 64. The front back half-cut line 74 is curved along the front front half-cut line 64, and is provided in a uniform waveform throughout. A straight short back half-cut line 76 is continuous with both ends of the front back half-cut line 74, and a tip of each short back half-cut line 76 is continuous with a horizontal line part above the cutting line 68 or the cutting line 70. Similarly, a front back half-cut line 78 is provided slightly inside the front front half-cut line 66 of the separation band portion 72. The front back half cut line 78 is curved along the front front half cut line 66, and is provided in a uniform and fine waveform throughout. A straight short back half-cut line 80 is continuous with both ends of each front back half-cut line 78, and a tip of each short back half-cut line 80 is continuous with a cutting line 68 or a horizontal line part below the cutting line 70. .

  A trapezoidal flap 82 is provided at the end of the side surface 20 connected to the crease line 58 of the side surface 18, separated by the crease line 84. A trapezoidal flap 86 is provided at the end of the side surface 20 opposite to the crease line 84 and separated by the crease line 88. A lateral surface half-cut line 90 is provided on the surface side of the side surface 20. The horizontal surface half-cut line 90 is symmetrical with respect to the side surface half-cut line 52 of the side surface 16 and the side surface 18, and extends obliquely upward from the upper intersection of the crease line 28 and the cutting line 70. A straight line reaching the ruled line 30. A portion where the crease line 28 and the crease line 30 intersect is slightly left uncut. On the back side slightly below the horizontal surface half-cut line 90, a horizontal back half-cut line 92 is provided. The lateral back half-cut line 92 is symmetrical with the lateral back half-cut line 54 of the side face 16 with the side face 18 in between.

  The crease line 30 is provided with a cutting line 94 and a short back half-cut line 96, and the cutting line 94 and the short back half-cut line 96 are symmetric with respect to the cut line 42, the short back half-cut line 43 of the crease line 24 and the side face 18. It is a shape.

  The glued piece 22 is provided with a cutting line 98 parallel to the crease line 84 in the vicinity of the cutting line 94. At both ends of the cutting line 98, the space between the crease line 30 or the side edges of the glued piece 22 is left uncut.

  Next, an example of the assembly method of the packaging box 10 with an opening function of this embodiment is demonstrated. Here, FIG. 2 is a view of the surface of the box-forming piece 12 of the packaging box 10 with an opening function. The folding method is such that the surface of the box-forming piece 12 is convex, and the back surface is convex. This folding method is called reverse folding.

  First, the crease line 28 is folded forward and the glue 100 is applied to the surface of the glued piece 22. Next, the crease line 24 is forward-folded, and the back surface of the side surface 14 is glued to the surface of the glued piece 22 with glue 100, resulting in the folded state shown in FIG. 3 and shipped in this state. Next, in a factory or the like where products are stored and packaged, the crease lines 24, 26, 28, and 30 are normally folded at 90 degrees to form a rectangular box. At this time, both ends of the separation band portion 72 are raised from the side surfaces 16 and 20 by the cutting lines 68 and 70 and slightly protrude beyond the crease lines 26 and 28 on the extension of the side surface 18.

  Next, the glue 102 is applied to the surface of the inner bottom cover piece 36. The flaps 48, 86 are normally folded at 90 ° at the crease lines 50, 88, the inner bottom cover piece 36 is then folded at 90 ° at the crease line 38, and the outer bottom cover piece 60 is rectified at 90 ° at the crease line 62. Folded, the back surface of the outer bottom lid piece 60 is glued to the surface of the inner bottom lid piece 36 with glue 102 to form the bottom surface. In this state, after the product is stored in the box, the glue 101 is applied to the surface of the inner upper lid piece 32, the flaps 44 and 82 are normally folded at 90 ° with the crease lines 46 and 84, and then the inner side with the crease line 34. The upper lid piece 32 is folded forward at 90 °, the outer upper lid piece 56 is folded forward at 90 ° along the crease line 58, and the back surface of the outer upper lid piece 56 is glued to the surface of the inner upper lid piece 32 by glue 101. After being formed, the state shown in FIG.

  Next, the usage method of the packaging box 10 with an opening function of this embodiment is demonstrated. When opening the packaging box 10 with the opening function, it has an end portion separated by the cutting line 68 of the separation band portion 72, and as shown in FIG. The lines 74 and 78 are peeled off while being broken, and the separation band portion 72 is removed as shown in FIG. 1C to divide the side face 18 into an upper part and a lower part. Note that the cut-off band portion 72 may be detached by holding an end portion separated by a cut line 70 opposite to the cut line 68. Since the cutting lines 68 and 70 are continuous with the short back half-cut lines 76 and 80 and the front back half-cut lines 74 and 78, the front back half-cut lines 74 and 78 are cleanly broken even if they are peeled off from any direction.

  When the separation band portion 72 is removed, an opening 104 is formed. When a finger is put into the created opening 104 and the upper part of the side surface 18 is pushed up, the side surfaces 16 and 20 become the horizontal surface half-cut lines 52 and 90, and the horizontal surface. It is broken at the back half-cut lines 54 and 92 and divided into an upper part and a lower part. At this time, as shown in FIG. 1 (d), the side surface 14 is folded back at an arbitrary angle along the folding line 40, and the upper portions of the side surfaces 16, 18, and 20 rotate around the folding line 40, thereby opening the opening 104. The product which spreads and is accommodated therein can be easily taken out. At the opening edge portion of the opening 104, a corrugated peeled back surface portion 106 that has been peeled off and cut on the front and back of the paper surface by front front half cut lines 64 and 66 and front back half cut lines 74 and 78 appears. The peeling back surface portion 106 is left protruding from the position of the front front half-cut lines 64 and 66 toward the center of the opening. Also on the opening edge portion where the side surfaces 16 and 20 are divided, the linear peeled back surface portion 108 that is peeled off and cut off by the lateral surface front half cutting lines 52 and 90 and the lateral surface back half cutting lines 54 and 92, It is left protruding from the position of the horizontal surface half-cut lines 52 and 90. Since the lateral back half-cut lines 54 and 92 intersect the short back half-cut lines 43 and 96 provided on the crease lines 24 and 30, the end portions of the peeling back surface portion 108 are neatly cut and adjacent to each other. It does not continue to the side surface 14 and the back surface of the glued piece 22.

  According to the packaging box 10 with the opening function of this embodiment, it can be easily opened with a weak force with a simple structure. Furthermore, since the peeled back surface portion 106 is exposed to a relatively soft and corrugated surface at the opening edge portion after opening, when the product is taken out from the opening edge portion, Even if the hand touches, it is safe without cutting the hand, and it is possible to prevent injuries due to contact with the opening edge. The peeled back surface portion 106 remains in a beautiful waveform, and the appearance after opening is good. In addition, since the separation band portion 72 can be broken from both the end portion on the cutting line 68 side and the end portion on the cutting line 70 side, the opening direction can be freely selected. Since most of the separation band portion 72 is surrounded by the front front half-cut lines 64 and 66 and the front back half-cut lines 74 and 78, the number of cutting lines passing through the paper is small, so that the carton strength is reduced. It is possible to ensure safety during transportation. Since the separation band portion 72 does not reduce the carton strength, it is not necessary to provide uncut portions at short intervals on the front front half-cut lines 64 and 66 and the front back half-cut lines 74 and 78 formed on the front and back surfaces. The front front half-cut lines 64 and 66 and the front back half-cut lines 74 and 78 can be formed by smooth continuous straight lines and curves. For this reason, surface design becomes free and it can express freely, without minding the position of the cut-off zone part 72.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The packaging box 110 with an opening function of this embodiment is provided by assembling a box forming piece 112 formed by punching out a single blank sheet such as paper. FIG. 5 is a developed view of the box-forming piece 112 as viewed from the surface. A front surface half-cut line 114 is provided on the side surface 18 of the box-forming piece 112 in parallel to the crease line 58. The front surface half-cut line 114 is a straight line connecting the intersection of the crease line 26 and the horizontal surface half-cut line 52 of the side surface 16 and the intersection of the crease line 28 and the horizontal surface half-cut line 90 of the side surface 20. In the middle of the line 114, there are provided uncut portions 116 at two locations on both sides of the center. A front back half-cut line 118 is provided at a position near the crease line 62 in the front front half-cut line 114. The front back half-cut line 118 is a straight line parallel to the front front half-cut line 114, and a fine waveform is provided uniformly throughout. Both end portions of the front back half-cut line 118 are provided as inclined straight lines and are continuous to the intersection of the front front half-cut line 114 and the crease line 26 or the front front half-cut line 114 and the crease line 28.

  The side surface 16 is provided with a short back half-cut line 120 that extends from the intersection of the horizontal surface half-cut line 52 and the crease line 26 at a right angle to the horizontal face back half-cut line 54. The side surface 20 is provided with a short back half-cut line 122 that extends from the intersection of the horizontal surface half-cut line 90 and the crease line 28 at a substantially right angle to the horizontal face back half-cut line 92.

  The method for assembling the packaging box 110 with the opening function of this embodiment is the same as that of the packaging box 10 with the opening function of the above-described embodiment, and the assembled state shown in FIG. As shown in FIG. 4B, when using the packaging box 110 with an opening function according to this embodiment, when opening the packaging box 110 with an opening function, as shown in FIG. Pushing inward in the box breaks the uncut portion 116 of the front front half-cut line 114 and divides the side surface 18 into an upper part and a lower part. Then, when a finger is put into the broken front front half-cut line 114 and the upper part of the side face 18 is pushed up, the side faces 16 and 20 are broken at the horizontal side half-cut lines 52 and 90 and the rear side half-cut lines 54 and 92 and the upper part. And divided at the bottom. At this time, as shown in FIG. 4C, the side surface 14 is reversely folded at an arbitrary angle along the folding line 40, and the upper portions of the side surfaces 16, 18, and 20 are rotated around the folding line 40 and broken. An opening is formed at the front half-cut line 114, and the product inside can be easily taken out. At the edge of the broken front front half-cut line 114, a corrugated peeled back surface portion 126 cut by the front back half-cut line 118 is left protruding from the position of the front front half-cut line 114. Also on the divided portions of the side surfaces 16 and 20, the straight peeled back surface portions 124 and 125 cut by the horizontal surface back half-cut lines 54 and 92 are left protruding from the positions of the horizontal surface front half-cut lines 52 and 90.

  According to the packaging box 110 with the opening function of this embodiment, it has the same effect as the above embodiment. The side face 18 is provided with only one front front half-cut line 114, which has a clean appearance and a high carton strength.

  Next, a third embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The packaging box 130 with an opening function of this embodiment is provided by assembling box-forming pieces formed by punching out one blank sheet such as paper. In the packaging box 130 with an opening function, a pair of side surface half-cut lines 132 and 134 are continuous from the surface of the side surface 16 while being curved and spreading symmetrically, straight on the surface of the side surface 18 and parallel to each other. It extends and reaches the crease line 28 between the side surface 18 and the side surface 20. The edge part located in the side surface 16 of the side surface half-cut line 132,134 is connected with the both-sides edge part of the unsealing piece 136. FIG. Side back half cut lines 138 and 140 are also provided on the back surfaces of the side faces 16 and 18 so as to be substantially parallel to the side front half cut lines 132 and 134 with a predetermined width. The side back half-cut lines 138 and 140 are formed with edges of an arc-shaped continuous geometric pattern. Further, on the back surface between the side surface half-cut lines 132 and 134 and the side back half-cut lines 138 and 140, side back half-cut lines 142 and 144 made of geometric patterns formed independently of each other are formed. Yes.

  In order to open the packaging box 130 of this embodiment, as shown in FIG. 6, the opening tab 136 of the side surface 16 is picked and pulled up, and along the side surface half-cut lines 132 and 134 and the side back half-cut lines 138 and 140. Then, the side surfaces 16 and 18 are opened. As a result, a geometrical pattern 148a is formed on the peeled back surface portion 146 extending from the opening edges of the side surfaces 16 and 18 by the side back half-cut lines 138 and 140 and the side back half-cut lines 142 and 144. The pattern by the side back half-cut lines 142 and 144 is an opening. Further, a similar geometric pattern 148b appears in the negative shape of the geometric pattern 148a on the side edge on the back side of the lid piece 18a with the side surfaces 16 and 18 opened, and the pattern formed by the side back half-cut lines 142 and 144 is convex. Has become a department.

  According to the packaging box 130 with the opening function of this embodiment, it has the same effect as the above-described embodiment, and a clean pattern appears on the opening edge portion by opening, and the appearance of the opening is improved.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The packaging box with opening function 150 of this embodiment has the same configuration as that of the third embodiment, and includes a character 152 in the pattern of the peeled back surface portion 146 that appears in the opening. Thereby, it is possible to display a note, a message or the like after opening, and it can be used for various purposes.

  The present invention is not limited to the above embodiment, and the shape and position of each front half-cut line can be freely set, and the shape of each back half-cut line may be other than a uniform waveform. It can be anything such as a simple waveform, a wave inclined in one direction, a continuous triangle or a semicircle. The interval between the front half-cut line and the back half-cut line can also be changed as appropriate. Furthermore, all the back half-cut lines of the three side surfaces divided up and down may be waveforms other than straight lines. In addition to the packaging box assembled into a cube, it can be used for packaging products of various shapes that are opened with a sewing machine wire.

DESCRIPTION OF SYMBOLS 10 Packing box with an opening function Box body formation piece 14, 16, 18, 20 Side surface 40 Folding curve 52, 90 Horizontal surface half-cut line 54, 92 Horizontal surface back half-cut line 64, 66 Front surface half-cut line 72 Cut-off part 74, 78 Front back half-cut line 104 Opening 106, 108 Peeling back surface

Claims (6)

  It consists of a box-forming piece integrally punched from one blank sheet, and this box-forming piece has a side surface connected in parallel to each other, and a thickness from the surface of the box-forming piece provided on the side surface. The surface half-cut line formed at a depth up to the middle of the surface, and formed at a depth from the back surface of the box forming piece to the middle of the thickness provided along the table half-cut line in the vicinity of the table half-cut line. A back half-cut line is provided, the back half-cut line is formed in a predetermined decorative pattern, and the front half-cut line and the back half-cut line are broken and opened to open the peeled back edge of the opened opening edge Is a packaging box with an opening function, wherein a decorative pattern formed by the back half-cut line is left.   2. The packaging box with an opening function according to claim 1, wherein the decorative pattern has a cutting edge formed in a wave shape, and a continuous wave-like peeled back surface portion is left protruding from the position of the front half-cut line.   A pair of front half-cut lines are provided on the side surface, and the inside of the pair of front half-cut lines is a cutting band for opening, and the inner side of the cut-off band is the back half-cut line along the front half-cut line. In the opening edge part of the opening part from which the separation band part has been removed, the continuous wavy peeling back part cut by the back half-cut line extends from the position of the front half-cut line to the center of the opening part. The packaging box with an unsealing function according to claim 1 or 2, which is left protruding.   The packaging box with an opening function is assembled into a cylindrical shape by folding four side surfaces at right angles with a crease line, and one of a pair of side surfaces parallel to each other has a front front half cut line as the front half cut line and A front back half-cut line that is the back half-cut line is provided substantially parallel to the connecting direction of the side faces, and a folding line is provided on the other side face substantially parallel to the connecting direction of the side faces. A pair of parallel side surfaces intersecting each other at right angles to the front surface half-cut line, the front surface half-cut line and the front side half-cut line that is continuous to the folding line, and the back half-cut line along the front half-cut line. The packaging box with an opening function according to claim 1 or 2, wherein a transverse half-cut line that is a line is provided.   The decorative pattern is a decorative pattern formed by the back half-cut line on the peeled back surface portion that is peeled off and cut off from the front and back of the side surface portion of the box-forming piece by the front half-cut line and the back half-cut line. The packaging box with an opening function according to claim 1, wherein is left in an uneven shape. The decorative pattern has a character formed by the back half-cut line on the peeled back surface portion that is peeled off and cut off from the front and back of the side surface portion of the box forming piece by the front half-cut line and the back half-cut line. The packaging box with an opening function according to claim 5.

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