JP5612951B2 - Packaging box - Google Patents

Description

  The present invention relates to a rectangular parallelepiped packaging box formed by bending a blank according to a crease line.

  Conventionally, an article to be packaged such as an arranged bottle or can is placed on a blank sheet obtained by punching a corrugated cardboard sheet, the product is wrapped by folding the blank sheet according to a crease line, and a flap is joined. Thus, there is known a wraparound case in which a case is formed while packaging a product (see, for example, Patent Document 1).

  In general, in the case of a wraparound case, the strength of the container itself is high for PET bottles and beverage cans to be stored, but when the case is stacked, the upper portion of the bottom case, such as a bottle, is recessed due to the weight of the upper case. A phenomenon occurs in which the top surface portion of the lower case corresponding to the cap portion of the lower case bottle or the like bites into the bottom surface portion of the upper case corresponding to. As a result, the distortion of the case increases by the amount of biting, and the distortion becomes swollen and impairs the appearance of the case.

  Further, when the strength of the corrugated cardboard constituting the case is lowered and buckling occurs, a wrinkled buckling line is generated from the corner portion of the case, so that the appearance is remarkably deteriorated.

  In the wraparound case described in Patent Document 1, the crease line at the boundary between the elevation plate and the flat plate is composed of one crease line portion and two parallel crease line portions. One crease line portion and two crease line portions are alternately provided so as to correspond to the cans to be packaged with the cut in between. With the folding along the crease line of the elevation plate and the flat plate, the portion between the two parallel crease lines becomes oblique along the outer periphery of the end of the can.

  According to this, when the loading load is applied, the bending angle of the two parallel crease lines changes to absorb the deformation in the height direction, so that it is possible to suppress the swelling of the trunk. . Further, during box making, it is said that the occurrence of box making failure can be prevented because one crease line portion prevents the two crease lines from being parallel to each other.

Japanese Patent No. 4126201

  However, according to the wraparound case of Patent Document 1 described above, it is considered that the effect is reduced when the arrangement of one crease line portion and two crease line portions does not correspond to the can to be packaged. It is done. In addition, since there is a cut between one crease line portion and two parallel crease line portions, it is disadvantageous in terms of hermeticity and strength.

  An object of the present invention is to provide a packaging box that can more effectively suppress torso swelling and buckling in view of such problems of the prior art.

  In order to achieve this object, a packaging box according to the present invention comprises a pair of length surfaces facing each other and a pair of facing surfaces facing each other by folding a blank made of corrugated board in accordance with the crease line. A packaging box formed in a rectangular parallelepiped box having a width surface, a bottom surface and a top surface facing each other, and the crease line at the upper edge of each length surface is parallel to both sides of the crease line. A plurality of composite crease line portions, which are portions where the crease lines are formed, are provided at predetermined intervals, and two crease lines are formed in parallel on both sides of the crease line at the lower end edge of each length surface. A plurality of composite crease line portions with predetermined intervals, and a composite crease line portion of the crease line at the upper end edge of each length surface and a crease line portion of the crease line at the lower end edge of the length surface Are alternately present along the length direction of the long surface.

  According to this, since the composite crease line part is bent through three crease lines, when the packaging boxes are stacked, the height direction of the packaging box is caused by the collapse of the core due to the stacking load. The distortion generated in the above is satisfactorily absorbed by changing the angle of bending at the three fold lines. Therefore, it is possible to effectively suppress the swelling of the trunk due to the stacked load.

  In addition, the composite crease line portion of the crease line at the upper end edge of each length surface and the crease line portion of the crease line at the lower end edge of the length surface are alternately continued along the length direction of the length surface. Therefore, the load in the vertical direction on the length surface can be reliably absorbed by the compound crease line portion of either the upper end edge or the lower end edge increasing the turning angle.

  In this invention, the both ends of each crease line provided with the said composite crease line part may be the said composite crease line part. According to this, the load conventionally applied to the corner portion is absorbed by the composite crease line portions at both ends adjacent to the corner portion, reducing the concentration of the load on the corner portion, and generating buckling lines at the corner portion. Can be suppressed.

It is a perspective view of the wraparound case which concerns on one Embodiment of this invention. It is a top view of the blank sheet | seat of the wraparound case of FIG. It is a figure which shows the ruled line blade for forming the crease line of the blank sheet | seat of FIG. It is a perspective view of the packaging box which concerns on another embodiment of this invention. It is a top view of the blank sheet of the packaging box of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a wraparound case according to an embodiment of the present invention. The wraparound case 10 is a cardboard case formed in a rectangular parallelepiped by bending a blank sheet on which a crease line is formed according to the crease line.

  As shown in the figure, the wraparound case 10 has a pair of length surfaces 11 and 12 facing each other, a pair of width surfaces 13 and 14 facing each other, and a bottom surface 15 and a top surface 16 facing each other. In the figure, 17 is a tearing band for opening by liner cutting, and 18 is a hand hole for inserting a hand when holding the wraparound case 10.

  FIG. 2 is a plan view of the blank sheet 20 of the wraparound case 10. As shown in the figure, inner flaps 22 are connected to the longitudinal ends of the length surfaces 11 and 12 of the blank sheet 20 via crease lines 21a, respectively. Outer flaps 24 are connected to both ends of the bottom surface 15 in the longitudinal direction via crease lines 21b. The outer flaps 25 are connected to both ends in the longitudinal direction of the top surface 16 via crease lines 21c.

  When forming the wraparound case 10 while packaging the product with the blank sheet 20, the width surfaces 13 and 14 are formed by the four inner flaps 22, the two outer flaps 24, and the two outer flaps 25 described above. Is done. The hand hole 18 is provided in each outer flap 25. A joint flap 23 is connected to the end of the length surface 11 opposite to the bottom surface 15 via a crease line 21d.

  The crease line 21d is provided with a plurality of composite crease line portions 211 formed with two crease lines 211a and 211b in parallel to both sides of the crease line 21d at a predetermined first interval. Similar fold lines 211 are also provided at a predetermined first interval on the fold line 21e between the length surface 12 and the top surface 16.

  The crease line 21f between the length surface 11 and the bottom surface 15 includes a plurality of composite crease line portions 212 in which two crease lines 212a and 212b are formed in parallel on both sides of the crease line 21f. Are provided at different predetermined second intervals. Similar fold lines 212 are also provided at the fold line 21g between the bottom surface 15 and the length surface 12 at the second interval. The blank sheet 20 is obtained by punching a corrugated cardboard sheet and pressing crease blades to form crease lines 21a to 21g.

  The first interval and the second interval described above are determined so that the composite crease line portions 211 and the composite crease line portions 212 alternately exist along the longitudinal direction of the length surfaces 11 and 12. Furthermore, when viewed from a direction perpendicular to the longitudinal direction, the composite crease line portion 211 and the composite crease line portion 212 are always present and are determined not to be interrupted. As long as there is no interruption, the composite crease line part 211 and the composite crease line part 212 may overlap at the end part. However, both ends of the crease lines 21d and 21e are composite crease line portions 211, and both ends of the crease lines 21f and 21g are composite crease line portions 212.

  Specifically, for example, when the length, width, and depth of the wraparound case 10 are about 369 mm, 245 mm, and 162 mm, respectively, the composite crease line portion 211 is set according to the first interval as follows. Can be arranged.

  That is, as shown in FIG. 2, the length of each composite crease line part 211 at both ends is 40 mm, and the four composite crease line parts 211 having a length of 50 mm are sequentially placed 10 mm, 20 mm, 25 mm, 20 mm, It can arrange | position at intervals of 10 mm. Further, according to the second interval, the composite crease line 212 has a length of each composite crease line part 212 at both ends of 50 mm, and three composite crease line parts 212 each having a length of 50 mm are 28. .75 mm apart can be placed.

  FIG. 3 shows a ruled line blade for forming a crease line 21d, 21e, 21f, or 21g provided with a composite crease line part 211 or 212. (A) is a side view of the ruled line blade, (b) is a plan view of the ruled line blade, and (c) is a crease line portion consisting of only one of the crease lines 21d, 21e, 21f, or 21g. A cross-sectional view of a normal ruled line blade 31 portion to be formed, and FIG. 6D is a cross-sectional view of a composite ruled line blade 321 portion forming the composite crease line portion 211 or 212.

  As shown in these drawings, the composite ruled line blade 321 is configured as a part in which a ruled line blade 32 thinner than the normal ruled line blade 31 is bonded to both sides. For example, the normal ruled line blade 31 has a width of 3 mm and the upper end is rounded, and the height is 22.90 mm at the cross-sectional portion of FIG. It is 22.95 mm in the cross-sectional part of the same figure (d). The ruled line blade 32 has a width of 2 mm and a height of 22.95 mm, and its upper end is rounded.

  In the figure, 33 is a die board or ruled line head that supports the ruled line blades 31 and 32. The crease lines 21d and 21e provided with the composite crease line part 211, and the crease lines 21f and 21g provided with the composite crease line part 212 are the anvil or the crease line blades 31 and 32 on the die board or the crease line head 33 facing each other. It is formed by being pressed onto the cardboard sheet with the ruled line head.

  At that time, the crease lines 21d to 21g are formed by the ruled line blade 31, and the crease lines 211a and 211b constituting the composite crease line part 211 and the crease lines 212a and 212b constituting the composite crease line part 212 are formed by the ruled line blade 32. It is formed.

  When packaging the product with the blank sheet 20, for example, the blank sheets 20 on both sides of the bottom surface 15 are first raised by folding according to the crease lines 21 f and 21 g at both ends of the bottom surface 15. Placed in. At this time, in the fold line portion 212 of the fold lines 21f and 21g, the fold line 21f or 21g and the fold lines 212a and 212b on both sides thereof are folded through three fold lines.

  At this time, the four inner flaps 22 at both ends of the standing length surfaces 11 and 12 are folded inward according to the crease line 21a, and the joint flap 23 is also folded inward according to the crease line 21d. At this time, the composite crease line portion 211 of the crease line 21d is bent via the crease line 21d and the three crease lines 211a and 211b on both sides thereof.

  Next, the top surface 16 is bent inward according to the crease line 21e, and the end of the top surface 16 facing the joint flap 23 is joined to the joint flap 23 with an adhesive. At this time, the composite crease line portion 211 of the crease line 21e is bent through the crease lines 21a and 211b on both sides in addition to the crease line 21e.

  Next, the outer flaps 24 at both ends of the bottom surface 15 are raised according to the crease line 21b and joined to the outer surface of the corresponding inner flap 22 with an adhesive. Furthermore, the outer flaps 25 at both ends of the top surface 16 are bent downward along the crease line 21c and joined to the outer surfaces of the corresponding inner flaps 22 by an adhesive. Thereby, packaging of a product is completed and the wraparound case 10 is completed.

  In the completed wraparound case 10, the portions other than the composite crease line portion 211 of the crease lines 21d and 21e are immediately folded at right angles according to the crease lines 21d and 21e, but in the composite crease line portion 211, the crease line 21d or Three crease lines 21e and crease lines 211a and 211b on both sides thereof are sequentially bent to form a right angle.

  Similarly, the portions other than the composite crease line portion 212 of the crease lines 21f and 21g are immediately folded at right angles according to the crease lines 21f and 21g. However, in the composite crease line portion 212, the fold lines 21f or 21g and the folds on both sides thereof are folded. The three fold lines of the line of sight 212a and 212b are sequentially bent to form a right angle.

  When the wraparound cases 10 that have been packaged in this way are stacked, the cap portion of the product container in the lower case with respect to the dented bottom of the product container in the upper case due to the stacking load. However, a phenomenon occurs where the top surface 16 of the lower case and the bottom surface 15 of the upper case are sandwiched. In addition, the core of the corrugated cardboard constituting the case is crushed. Then, the distortion in the height direction of the lower case and the upper case increases, and in the case of a conventional wraparound case, the distortion is directly transmitted to the length surface, causing the body to bulge on the length surface, There is a risk of damaging the appearance.

  However, according to the present embodiment, the composite crease line portions 211 and 212 are bent through three crease lines, so that the distortion caused by the stacked load is the angle of the fold in the three crease lines. It is possible to absorb well by changing. Therefore, even if a certain amount of distortion occurs, it is not directly transmitted to the length surfaces 11 and 12. That is, in order to apply a load to the length surfaces 11 and 12 due to the strain, it is necessary to generate a strain larger than the conventional one. Therefore, it is possible to suppress the swelling of the trunk as compared with the conventional case.

  In addition, according to the conventional wraparound case, when the stacking period has passed to some extent, the strength of the cardboard constituting the wraparound case is reduced to cause buckling, and as the buckling progresses, the corners of the wraparound case However, according to the present embodiment, since the composite crease line portion 211 or 212 is always located at both ends of the crease lines 21d to 21g, the corner portions are conventionally loaded. The load can be absorbed by the composite crease line portion 211 or 212 at the corner portion, the concentration of the load on the corner portion can be reduced, and the occurrence of buckling lines at the corner portion can be suppressed.

  Further, in the conventional wraparound case, the inner flap is structurally subjected to a load after a considerably large strain is generated, so that it is difficult to contribute to the compressive strength. On the other hand, according to the present embodiment, when the composite crease line part 211 or 212 itself is distorted, a large distortion in the length surfaces 11 and 12 until the load is applied to the conventional inner flap. Since it allows without causing the swelling of the body, the timing at which the load is applied to the inner flap and the length surfaces 11 and 12 can be synchronized, and higher compression strength can be obtained.

  Further, the composite crease line portions 211 and 212 are alternately arranged along the length direction of the length surfaces 11 and 12, and further, the composite crease line portion 211 is always seen from the direction perpendicular to the length direction. In addition, since it is arranged continuously so that 212 exists, any load in the vertical direction with respect to the length surfaces 11 and 12 can always be absorbed by distortion of the composite crease line portion 211 or 212. .

  By the way, when comparing the conventional wraparound case and the wraparound case according to the present embodiment by performing a compression test based on JIS0212, the distortion of the present embodiment is increased compared to the conventional case, It showed a high strength value, and it was found that the compressive strength was remarkably improved. In addition, the wraparound case according to the present embodiment exhibited a compressive strength equal to or higher than that of the conventional wraparound case even when the material of the core is dropped by one rank.

  In addition, for the conventional wraparound case and the wraparound case according to the present embodiment, it corresponds to the case where two test products are prepared and stacked in two tiers, and further positioned from the lowest level to the middle level when loaded with pallets. The load (220 kg) to be placed is placed on it, and the change in the height of the four corners of the test product and the transition of the swelling of each length surface of the test product on the lower stage are measured. Compared to the conventional test product In the test product of this embodiment, the swelling of the trunk was remarkably small even when the height was lowered.

  Moreover, when 24 hours passed, a buckling line was generated in the conventional test product, but no buckling line was generated in the test product of this embodiment. In addition, even when the quality of the core is reduced by one rank, the test product of this embodiment has significantly less body swelling than the conventional test product, and no buckling line was generated even after 24 hours.

  When stacking the wraparound cases 10, the stacking is performed in different directions for each stage, and the length surface and the width surface of the upper and lower adjacent case cases are aligned in the vertical direction to form a flat surface. Is preferably arranged in such a manner that the corners of the width surface are located at positions adjacent to the composite crease line portions 211 or 212 of the long surface, and the arrangement of the composite crease line portions 211 and 212. According to this, the load concentrated on the corners of the width surface can be satisfactorily absorbed by the distortion of the composite crease line portion 211 or 212 on the adjacent length surface.

  FIG. 4 is a perspective view of a packaging box according to another embodiment of the present invention. As shown in the figure, the packaging box 40 has a pair of length surfaces 41 and 42 facing each other, a pair of width surfaces 43 and 44 facing each other, and a bottom surface 45 and a top surface 46 facing each other.

  FIG. 5 is a plan view of the blank sheet of this packaging box. As shown in the figure, the blank sheet 50 has outer flaps 52 connected to the height direction ends of the length surfaces 41 and 42 via a fold line 51a on the top surface side and a fold line 51b on the bottom surface side. doing. Further, inner flaps 54 are connected to both ends in the height direction of the width surfaces 43 and 44 via a fold line 53a on the top surface side and a fold line 53b on the bottom surface side.

  A joint flap 56 is connected to the end of the width surface 44 opposite to the length surface 42 via a fold line 55 in the height direction. A crease line 55 in the height direction is provided at each boundary of the length surface 41, the width surface 43, the length surface 42, and the width surface 44.

  The crease line 51a is provided with a plurality of composite crease line portions 511 formed with two crease lines 511a and 511b in parallel to both sides of the crease line 51a at a predetermined first interval. Similar fold lines 511 are also provided in the fold line 53a at a predetermined second interval.

  In the crease line 51b, a plurality of composite crease line portions 512 in which two crease lines 512a and 512b are formed in parallel to both sides of the crease line 51b are provided at a predetermined third interval. A similar composite crease line portion 512 is also provided in the crease line 53b at a predetermined fourth interval.

  The first interval and the third interval described above are determined so that the composite crease line portions 511 and the composite crease line portions 512 alternately exist along the longitudinal direction of the length surfaces 41 and 42. Further, when viewed from a direction perpendicular to the longitudinal direction, the composite crease line portion 511 and the composite crease line portion 512 are always present and are determined not to be interrupted. As long as it continues so that it may not be interrupted, the composite crease line part 511 and the composite crease line part 512 may overlap in an edge part.

  Further, the second interval and the fourth interval described above are determined so that the composite crease line portions 511 and the composite crease line portions 512 alternately exist along the width direction of the width surfaces 43 and 44. Further, when viewed from a direction perpendicular to the width direction, the composite crease line portion 511 and the composite crease line portion 512 are always present and are determined not to be interrupted. As long as there is no interruption, the composite crease line part 511 and the composite crease line part 512 may overlap at the end part.

  However, both ends of the crease lines 51a and 53a are composite crease line portions 511, and both ends of the crease lines 51b and 53b are composite crease line portions 512.

  When packaging canned or bottled products, for example, first, the length surface 41, the width surface 43, the length surface 42, the width surface 44, and the joint flap 56 are sequentially perpendicular to each other according to the crease line 55 therebetween. The joint flap 56 is joined to the end of the length surface 41 by bending. Thereby, the blank sheet 50 is formed in a cylindrical shape.

  Next, the two inner flaps 54 on the side constituting the bottom surface 45 are bent along the crease line 53b. At this time, the composite crease line portion 512 of the crease line 53b is bent through the crease line 53b and the three crease lines of the crease lines 512a and 512b on both sides thereof.

  Further, the two outer flaps 52 on the side constituting the bottom surface 45 are bent according to the crease line 51b, and tape tensioning is performed on a region including the edges of the two outer flaps 52 that are adjacent to each other. At this time, the composite crease line portion 512 of the crease line 51b is bent through the crease line 51b and the crease lines 512a and 512b on both sides thereof. Thereby, the bottom face 45 of the packaging box is formed.

  Next, the packaging box in which the bottom surface 45 is formed is arranged with the bottom surface 45 facing down, and the aligned products are stored in the packaging box. Then, the two inner flaps 54 on the side constituting the top surface 46 are bent along the crease line 53a. At this time, the composite crease line portion 511 of the crease line 53a is bent through the crease line 53a and the three crease lines of the crease lines 511a and 511b on both sides thereof.

  Further, the two outer flaps 52 on the side constituting the top surface 46 are bent along the crease line 51a. At this time, the composite crease line portion 511 of the crease line 51a is bent through the crease line 51a and the crease lines 511a and 511b on both sides thereof. Then, tape tensioning is performed on the region including the edges of the two outer flaps 52 that are adjacent to each other. Thereby, the top surface 46 of a packaging box is formed and packaging is completed.

  In the completed packaging box 40, the portions other than the composite crease line portion 511 of the crease lines 51a and 53a are immediately folded at right angles according to the crease lines 51a and 53a, but in the composite crease line portion 511, the crease lines 51a or 53a And the three crease lines of the crease lines 511a and 511b on both sides thereof are sequentially bent to form a right angle.

  Similarly, the portions other than the composite crease line portion 512 of the crease lines 51b and 53b are immediately bent at a right angle according to the crease lines 51b and 53b, but the crease line 51b or 53b and the folds on both sides thereof are folded at the composite crease line portion 512. The three fold lines of the line of sight 512a and 512b are sequentially bent to form a right angle.

  When packaging boxes that have been packaged in this way are stacked, due to the stacking load, as in the case of the wrap-around case described above, there is a risk of swelling and buckling. Even in this case, the composite crease line portions 511 and 512 are distorted by themselves to avoid the load from being directly applied to the length surfaces 41 and 42 and the width surfaces 43 and 44 and their corners as much as possible. And buckling lines can be prevented as much as possible.

  At that time, either the composite crease line 511 or the composite crease line 512 is always present when viewed in the height direction. Therefore, the composite crease line 511 or the composite crease line 512 is not affected by any load in the vertical direction. Since the effect by either is given, a swelling of a trunk can be prevented effectively.

  10 ... Wrap-around case, 11, 12, 41, 42 ... Long face, 13, 14, 43, 44 ... Wide face, 15, 45 ... Bottom face, 16, 46 ... Top face, 20, 50 ... Blank sheet, 21a- 21g, 212a, 212b, 51a, 53a, 51b, 53b, 211a, 211b, 511a, 511b, 512a, 512b ... fold line, 40 ... packaging box, 211,212,511,512 ... complex crease line part.

Claims (2)

A rectangular parallelepiped having a pair of length surfaces facing each other, a pair of width surfaces facing each other, and a bottom surface and a top surface facing each other by folding a blank made of corrugated cardboard formed with a crease line according to the crease line A packaging box formed into a box,
The crease line at the upper end edge of each length surface is provided with a plurality of compound crease line portions with two crease lines formed in parallel on both sides of the crease line at a predetermined interval,
The crease line at the lower end edge of each length surface is provided with a plurality of compound crease line portions, which are portions in which two crease lines are formed in parallel on both sides of the crease line, with a predetermined interval,
The composite crease line portion of the crease line at the upper end edge of each length surface and the composite crease line portion of the crease line at the lower end edge of the length surface alternately exist along the length direction of the length surface. A packaging box characterized by that.   The packaging box according to claim 1, wherein both ends of each crease line provided with the composite crease line part are the composite crease line part.

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