JP5577056B2 - Drop-off packaging box - Google Patents

Description

  The present invention relates to a drop-off prevention packaging box having a structure in which a bottom part is assembled with one touch.

  Conventionally, when a box for forming a box formed by integrally punching a blank sheet from a single blank sheet is assembled, the side connected to each other is glued and folded, and the side is assembled into a rectangular box. In some cases, the bottom cover piece is raised at the same time, and the bottom is formed with one touch. In the packaging box disclosed in Patent Document 1, a bottom lid piece is a crease line at each of the four side surfaces that are connected to each other and the end portions that are parallel to the connecting direction. It is provided separated by. On the side surface where the bottom cover piece is not provided, the flaps are provided by being separated by crease lines, respectively. The bottom cover piece and the flap are glued together in the folded state of the packaging box. When the packaging box is assembled from a glued and folded state into a rectangular box, each bottom lid piece is raised from the side together with a flap and is normally folded at a right angle with a crease line. And a part of a pair of bottom cover piece mutually overlaps, and it latches reliably, and forms a bottom face. Moreover, there exists a packaging box with a partition currently disclosed by patent document 2 as what ensures the latching of bottom cover pieces. This is intended to prevent the bottom cover piece from being returned to the folded state by forming a notch portion that engages with the bottom cover piece in the assembled state of the box at the edge of the bottom cover piece.

JP 2005-112384 A Japanese Patent Laid-Open No. 10-77025

  In the case of the above-described background art, the engagement between the bottom cover pieces is not sufficiently strong, and there is a possibility that the product falls off when a heavy product is stored. In addition, a gap may be formed between the bottom lid pieces, and it is not considered to reduce the gap.

  The present invention has been made in view of the problems of the background art described above, and an object thereof is to provide a drop-off prevention packaging box in which a bottom portion can be reliably formed with high strength and an assembled state of the box body can be maintained. And

  The present invention comprises a box-forming piece integrally punched from one blank sheet, and has a bottom portion for closing one open end formed by side surfaces connected to each other and side surfaces connected in an assembled state. A first bottom cover piece that is continuous with the one side surface and forms a part of the bottom part; a second bottom cover piece that extends from a side surface facing the first bottom cover piece; A pair of bottom flaps extending from a pair of side surfaces located between the first bottom cover piece and the second bottom cover piece are drop-off prevention packaging boxes each provided by being separated by a side face and a crease line. . The first bottom lid piece and the second bottom lid piece have a bottom glued piece projecting toward the bottom flap adjacent thereto and glued to an end opposite to the crease line, and the bottom glued piece The second bottom lid piece or the bottom insertion piece that is superimposed on the first bottom lid piece and is opposed to each other in the assembled state, and is provided between the bottom insertion piece and the bottom paste piece. A lock piece protruding outward from the end is provided. A concave portion that is recessed toward the center of the bottom insertion piece and the lock piece is provided at a base end portion of the bottom insertion piece and the lock piece that is close to the bottom paste piece. In the assembled state of the drop-off prevention packaging box, the recess of the bottom insertion piece of the first bottom cover piece and the recess of the lock piece of the second bottom cover piece are engaged with each other, and the first bottom cover piece The concave portion of the lock piece and the concave portion of the bottom insertion piece of the second bottom lid piece are locked to each other, and the base end portions of the pair of lock pieces opposite to the concave portions are in contact with each other and locked. , It is possible to prevent at least three places from locking and returning to the folded state, and to maintain the shape of the bottom.

Further, the lock piece is formed in a triangular shape having an acute tip that protrudes toward the bottom insertion piece as it moves away from the ends of the first bottom cover piece and the second bottom cover piece. Has been. Side edge portions of the bottom insertion piece and the lock piece, where the recesses are provided, abut against the bottom insertion piece or the lock piece facing each other during the step of locking the recesses. So as to be inclined.

  The drop-off prevention packaging box of the present invention can form a box body with a simple structure with a single touch, and the first bottom cover piece and the second bottom cover piece can be reliably locked to each other. Furthermore, the shape of the bottom can be maintained with high strength, and the gap between the first bottom lid piece and the second bottom lid piece can be reduced. The assembled drop-out prevention packaging box does not return to the folded state, and the efficiency of the assembly work is improved.

It is an expanded view of the drop-out prevention packaging box of one embodiment of this invention. It is the top view which looked at the bottom part of the drop-out prevention packaging box of this embodiment from right above. It is the bottom view which looked at the bottom part of the drop-off prevention packaging box of this embodiment from right below.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention, and a drop-proof packaging box 10 according to this embodiment is an assembly of box-forming pieces 12 formed by punching one blank sheet such as cardboard. Is formed.

  FIG. 1 is a developed view of the box-forming piece 12 as viewed from the surface. The box-forming piece 12 is formed by connecting side surfaces 14, 16, 18, and 20 in parallel with 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 slightly short and almost equal to each other. equal. Further, a glued piece 22 that is glued to the back surface of the side surface 20 in the assembled state of the drop-off prevention packaging box 10 is provided on the side edge portion of the side surface 14. The glued piece 22 and the side surfaces 14, 16, 18, and 20 are divided by crease lines 24, 26, 28, and 30, respectively.

  On the side surface 14, an 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 upper lid insertion piece 36 is further provided at the end of the upper lid piece 32 opposite to the crease line 34 and separated by a crease line 38.

  A first bottom cover piece 40 is provided at the end of the side surface 14 opposite to the crease line 34 and separated by a crease line 42. The first bottom cover piece 40 is formed in a trapezoidal shape with the crease line 42 as the bottom, and the length from the crease line 42 to the end 40a which is the upper base parallel to the crease line 42 is the drop-off prevention packaging box 10. In the assembled state, the length is located near the center line of the bottom, that is, about half the width of the side surfaces 16 and 20. The end 40a is integrally provided with a small rectangular first bottom insertion piece 44 that protrudes outward from the end 40a at a position close to the glued piece 22. A recess 46 that is recessed toward the inside of the first bottom insertion piece 44 is formed at the base end of the first bottom insertion piece 44 on the side opposite to the glued piece 22. Has been. An edge portion 44 a of the first bottom insertion piece 44 that continues to the recess 46 is inclined so as to approach the end portion 40 a as it approaches the recess 46. A portion of the end portion 40 a on the side surface 16 side is provided with a substantially triangular bottom glued piece 48 separated by a crease line 50. The crease line 50 is provided in a direction that intersects the crease line 42 at an acute angle. A first locking piece 52 that protrudes outward from the end 40a is provided adjacent to the end 40a on the first bottom insertion piece 44 side of the bottom glued piece 48. The first lock piece 52 is formed in an acute-angled triangle shape that protrudes toward the first bottom insertion piece 44 as the distance from the end portion 40a increases. A concave portion 54 that is recessed toward the inside of the first lock piece 52 is formed at the base end portion of the first lock piece 52 on the bottom glued piece 48 side. An edge 52 a of the first lock piece 52 that is continuous with the recess 54 is inclined so as to approach the crease line 50 as it approaches the recess 54.

  A trapezoidal upper flap 56 is provided at the end of the side surface 16 connected to the crease line 34 of the side surface 14 and separated by a crease line 58. A triangular bottom flap 60 is provided at the end of the side surface 16 opposite to the crease line 58 and separated by a crease line 62.

  A second bottom cover piece 64 having the same shape as that of the first bottom cover piece 40 is provided on an end portion of the side face 18 adjacent to the crease line 62 of the side face 16 by being separated by a crease line 66. The second bottom cover piece 64 is formed in a trapezoidal shape with the crease line 66 as the bottom, and the length from the crease line 66 to the end 64a which is the upper base parallel to the crease line 66 is the drop-off prevention packaging box 10. In the assembled state, the length is located near the center line of the bottom, that is, about half the width of the side surfaces 16 and 20. The second bottom lid piece 64 is integrally provided with a small rectangular second bottom insertion piece 68 that protrudes outward from the end portion 64 a at a position close to the bottom flap 60. A concave portion 70 that is recessed toward the inside of the second bottom portion insertion piece 68 is formed at the base end portion of the second bottom portion insertion piece 68 on the side opposite to the bottom flap 60. ing. The edge 68a of the second bottom insertion piece 68 that is continuous with the recess 70 is inclined so as to approach the edge 64a as it approaches the recess 70. A portion of the end portion 64 a on the side surface 20 side is provided with a substantially triangular bottom glued piece 72 divided by a crease line 74. The crease line 74 is provided in a direction that intersects the crease line 66 at an acute angle. A second lock piece 76 that protrudes outward from the end 64a is provided adjacent to the end 64a on the second bottom insertion piece 68 side of the bottom glued piece 72. The second lock piece 76 is formed in an acute triangular shape protruding toward the second bottom insertion piece 68 as the distance from the end 64 a increases. A recess 78 that is recessed toward the inside of the second lock piece 76 is formed at the base end portion of the second lock piece 76 on the bottom glued piece 72 side. The edge 76 a of the second lock piece 76 that is continuous with the recess 78 is inclined so as to approach the crease line 74 as it approaches the recess 78.

  A trapezoidal upper flap 80 is provided at the end of the side surface 20 connected to the end of the side surface 18 opposite to the second bottom cover piece 64 and separated by a crease line 82. A triangular bottom flap 84 is provided at the end of the side surface 20 opposite to the crease line 82 and separated by the crease line 86.

  Next, a method for assembling the dropout prevention packaging box 10 of this embodiment will be described. Here, FIG. 1 is a view of the surface of the box-forming piece 12 of the drop-off prevention packaging box 10, the folding method in which the surface of the box-forming piece 12 is convex is forwardly folded, and the back surface is convex. This folding method is called reverse folding.

  First, the first bottom lid piece 40, the bottom flap 60, the second bottom lid piece 64, and the bottom flap 84 are normally folded at the crease lines 42, 62, 66, 86, and then the crease line of the first bottom lid piece 40 is obtained. 50 and the crease line 74 of the second bottom cover piece 64 are reversely folded, and glues 88 and 90 are applied to the back surfaces of the bottom glued pieces 48 and 72, respectively. Next, the crease line 26 is normally folded, and further glue 92 is applied to the surface of the glued piece 22. Then, the crease line 30 is folded forward. As a result, the side surface 20 is glued to the surface of the glued piece 22 with the glue 92. The back surface of the bottom glued piece 48 of the first bottom cover piece 40 is glued to the surface of the bottom flap 60 by glue 88, and the back surface of the bottom glued piece 72 of the second bottom cover piece 64 is glued to the bottom flap 84 by glue 90. Glued to the surface. As a result, the box-forming piece 12 is folded and shipped in this state.

  Next, in a factory or the like for storing and packaging the contents, the crease lines 24, 26, 28, and 30 are each normally folded at 90 degrees to form a rectangular box. At this time, the bottom glued piece 48 of the first bottom cover piece 40 is glued to the bottom flap 60, and the bottom glued piece 72 of the second bottom lid piece 64 is glued to the bottom flap 84. The ruled lines 42, 62, 66, 86 are automatically caused to open at approximately 90 degrees to form the bottom.

  In the middle of forming the bottom, the edge 44a of the first bottom insertion piece 44 of the first bottom cover piece 40 and the edge 76a of the second lock piece 76 of the second bottom cover piece 64 gradually approach each other. The edge 52a of the first lock piece 52 of the first bottom cover piece 40 and the edge 68a of the second bottom insertion piece 68 of the second bottom cover piece 64 gradually approach each other and come into contact with each other. Each is deflected. When further approaching, the recess 46 of the first bottom cover piece 40 and the recess 78 of the second bottom cover piece 64 are locked together, and the recess 54 of the first bottom cover piece 40 and the recess 70 of the second bottom cover piece 64 are mutually connected. The first bottom cover piece 40 and the second bottom cover piece 64 are flexed and are securely locked. Then, the first bottom insertion piece 44 and the first lock piece 52 of the first bottom cover piece 40 are inserted into the back surface of the second bottom cover piece 64. The second bottom insertion piece 68 and the second lock piece 76 of the second bottom cover piece 64 are inserted into the back surface of the first bottom cover piece 40 and locked together. Further, the first lock piece 52 and the second lock piece 76 come into contact with the base end portions on the opposite side to the concave portions 54 and 78. As a result, the first bottom cover piece 40 and the second bottom cover piece 64 are locked to each other at three positions, the bottom part is securely locked, the shape of the bottom part of the box is maintained, and the folded state is prevented.

  In this state, the contents are put in the box, the upper flap 56 and the upper flap 80 are normally folded at the crease lines 58 and 82, the upper lid piece 32 is then folded at the crease line 34, and the crease line 38 is further corrected. The upper lid insertion piece 36 is inserted into the back side of the side face 18 and closed.

  According to the drop-off preventing packaging box 10 of this embodiment, the bottom of the box can be formed with a simple structure with a single touch, and the following operational effects can be achieved. First, the 1st bottom cover piece 40 and the 2nd bottom cover piece 64 can be locked mutually, and the shape of the bottom part of a box can be maintained reliably. By simply folding the crease lines 24, 26, 28, and 30 to 90 degrees each to form a rectangular box, the bottom is easily locked with high strength with a single touch, and no special process is required. Then, the engagement of the recess 46 of the first bottom cover piece 40 and the recess 78 of the second bottom cover piece 64, the engagement of the recess 54 of the first bottom cover piece 40 and the recess 70 of the second bottom cover piece 64, Three lock mechanisms are formed by the engagement of the one lock piece 52 and the second lock piece 76. Thereby, while maintaining the shape of a bottom part with high intensity | strength, the flat bottom part with few gaps between the 1st bottom cover piece 40 and the 2nd bottom cover piece 64 can be formed. Moreover, since the assembled box is not returned to the folded state, the efficiency of the assembly work is improved. Furthermore, it can be assembled stably by either automatic assembly by machine or manual assembly, and the locking mechanism is reinforced, but when discarded, it can be returned to a flat folded state by hand. It can be easily recovered as a resource.

  The drop-out prevention packaging box of the present invention is not limited to the above embodiment, and the size and shape of the box can be appropriately changed according to the contents. The material of the box-forming piece can also be changed as appropriate, such as paper or synthetic resin. The shape of the first lock piece and the second lock piece is also free, and any shape can be used as long as it is surely overlapped and locked on the bottom cover piece.

DESCRIPTION OF SYMBOLS 10 Drop-off prevention packaging box 12 Box forming pieces 14, 16, 18, 20 Side surface 22 Glued piece 40 First bottom cover piece 44 First bottom insertion piece 44a, 52a, 68a, 76a Edge portions 46, 54, 70 , 78 Recess 48, 72 Bottom glued piece 60, 84 Bottom flap 64 Second bottom lid piece 68 Second bottom insertion piece 76 Second lock piece

Claims (1)

It is composed of a box-forming piece integrally punched from one blank sheet, and is provided with a bottom portion that closes one open end formed by a side surface connected to each other and a side surface connected in an assembled state,
The bottom portion includes a first bottom lid piece that is continuous with the one side surface and forms a part of the bottom portion, a second bottom lid piece that extends from a side surface facing the first bottom lid piece, and the first bottom A pair of bottom flaps extending from a pair of side surfaces located between the lid piece and the second bottom lid piece are provided separated from each other by a side surface and a crease line,
The first bottom lid piece and the second bottom lid piece have a bottom glued piece projecting toward the bottom flap adjacent thereto and glued to an end opposite to the crease line, and the bottom glued piece The second bottom lid piece or the bottom insertion piece that is superimposed on the first bottom lid piece and is opposed to each other in the assembled state, and is provided between the bottom insertion piece and the bottom paste piece. Lock pieces projecting outward from the end portions are provided,
At the base end portion of the bottom insertion piece and the lock piece, close to the bottom glued piece, a recess is provided that is recessed toward the center side of the bottom insertion piece and the lock piece,
The lock piece is formed in a triangular shape having an acute tip that protrudes toward the bottom insertion piece as it is away from each end of the first bottom lid piece and the second bottom lid piece, Edges of the bottom insertion piece and the lock piece, where the recesses are provided, come into contact with the bottom insertion piece or the lock piece facing each other during the step of locking the recesses. Tilt to
In the assembled state of the box, the concave portion of the bottom insertion piece of the first bottom lid piece and the concave portion of the lock piece of the second bottom lid piece are locked together, and the lock piece of the first bottom lid piece And the bottom insertion piece of the second bottom lid piece are locked to each other, and the base ends of the pair of lock pieces on the opposite side of the recess are abutted and locked to each other, at least A drop-out prevention packaging box, which is locked at three places to prevent it from returning to a folded state and maintains the shape of the bottom.

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