Packaging box

Abstract

To provide a packaging box capable of preventing a decrease in strength against a load from above while forming a hand hooking hole.SOLUTION: A packaging box 1A includes: a wall part 10 having front and rear end walls 11 and 11 and left and right side walls 12 and 12; a top plate 20 connected to an upper edge part of the wall part 10; and a bottom plate 30 connected to a lower edge part of the wall part 10. The top plate 20 and the bottom plate 30 have a hand hooking hole 40 formed therein. When the packaging box 1A is held, the orientation of the packaging box 1A is changed so that the top plate 20 and the bottom plate 30 are arranged in a lateral direction, and the handle hooking hole 40 can be arranged on a lateral surface of the packaging box 1A.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a packaging box.

Background Art

[0002] As a cardboard packaging box, there is one having front, rear, left, and right wall bodies, and handle holes are respectively formed in the left and right wall bodies (see, for example, Patent Document 1). When having such a packaging box, the hands are respectively placed in the handle holes on both side walls to lift the packaging box.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described conventional packaging box, since the handle holes are open in the wall body and the strength of the wall body against the load from above is reduced, there is a problem that the wall body is easily deformed when a load acts on the packaging box from above during transportation or storage.

[0005] An object of the present invention is to solve the above-described problems and provide a packaging box capable of preventing a decrease in strength against a load from above while forming handle holes.

Means for Solving the Problems

[0006] To solve the above problems, the present invention provides a packaging box including a wall portion having front and rear end walls and left and right side walls, a top plate continuously provided at an upper edge portion of the wall portion, and a bottom plate continuously provided at a lower edge portion of the wall portion, wherein handle holes are formed in the top plate and the bottom plate.

[0007] In the packing box of the present invention, since there are no hand-holding holes formed in the wall portion, it is possible to prevent a decrease in the strength of the wall portion against a load from above. Also, when holding the packing box of the present invention, the orientation of the packing box is changed so that the both end walls are arranged vertically and the top plate and the bottom plate are arranged horizontally, and by grasping the hands on both hand-holding holes arranged on the lateral surface of the packing box, the packing box can be lifted.

[0008] In the above-described packing box, with the contents accommodated in the wall portion, a gap is formed between the inner surface of the top plate and at least a part of the contents, and a gap is formed between the inner surface of the bottom plate and at least a part of the contents, and the shape and size of the wall portion are set. And it is preferable to form the hand-holding holes at positions corresponding to the gaps. With this configuration, when grasping the hand-holding holes, it becomes easier to insert the fingertips into the packing box from the hand-holding holes, and the hands can be surely placed on the edges of the hand-holding holes.

[0009] The present invention can be applied to a corrugated cardboard box of a wrap-around type in which the bottom plate, the both side walls, and the top plate are continuously provided in a cylindrical shape. In this case, left and right first flaps respectively continuously provided on the both side walls, and upper and lower second flaps respectively continuously provided on the top plate and the bottom plate are provided, and the end walls are formed by overlapping the both second flaps on the outer surface or the inner surface of the both first flaps.

[0010] The present invention can be applied to an A-type corrugated cardboard box in which the both end walls and the both side walls are continuously provided in a cylindrical shape. In this case, left and right first flaps respectively continuously provided on the both side walls, and front and rear second flaps respectively continuously provided on the top plate and the bottom plate are provided, and the top plate and the bottom plate are formed by overlapping the both second flaps on the outer surface or the inner surface of the both first flaps.

Effects of the Invention

[0011] In the present invention, since the hanging holes are not arranged on the wall of the packing box, while suppressing the strength reduction against the load from above, when holding the packing box, by changing the orientation of the packing box, the hanging holes can be arranged on the side surface of the packing box.

Brief Description of the Drawings

[0012]

Figure 1

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Modes for Carrying Out the Invention

[0013] Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the description of each embodiment, the same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the following description, the front-back, left-right directions are set for convenience in describing the packaging boxes of each embodiment, and do not limit the configuration and usage state of the packaging boxes of the present invention.

[0014] [First Embodiment] As shown in FIG. 1, the packaging box 1A of the first embodiment is a wrap-around corrugated box including a cylindrical wall portion 10, a top plate 20 provided at the upper opening of the wall portion 10, and a bottom plate 30 provided at the lower opening of the wall portion 10. The wall portion 10 has front and rear end walls 11, 11 and left and right side walls 12, 12.

[0015] As shown in FIG. 2, the packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out a corrugated sheet at each fold line. The blank sheet S1 shown in FIG. 2 is arranged so that the inner surface side is visible. The fold lines of the blank sheet S1 are ruled lines (pressed ruled lines) formed by linearly pressing the surface of the blank sheet S1. Note that intermittent cuts may be formed in the ruled lines. In this way, it becomes easier to fold the blank sheet S1 at the fold lines. Alternatively, the fold lines may be configured by intermittently forming linear half-cut cuts that only cut the surface of the sheet or cuts that penetrate the sheet.

[0016] The cutting guide lines of the blank sheet S1 are formed by a continuous single slit or a line formed by intermittently forming a plurality of slits. Note that the cutting guide lines may be formed by half-cut lines.

[0017] As shown in Fig. 1, the bottom plate 30 is a rectangular flat plate (see Fig. 2). On the left edge of the bottom plate 30, the left side wall 12 is continuously provided via a broken line, and on the right edge of the bottom plate 30, the right side wall 12 is continuously provided via a broken line. That is, the bottom plate 30 is continuously provided at the lower edges of the left and right side walls 12, 12. The left and right side walls 12, 12 are the same rectangular wall bodies and are formed perpendicular to the bottom plate 30.

[0018] At the upper edge of the left side wall 12, the top plate 20 is continuously provided via a broken line. The top plate 20 is a rectangular flat plate same as the bottom plate 30 and is formed perpendicular to the left side wall 12. While folding the blank sheet S1 (see Fig. 2) along each broken line, the joint piece 13 continuously provided at the upper edge of the right side wall 12 is joined to the inner surface of the top plate 20, whereby a rectangular cylindrical wall portion 10 is formed by the right side wall 12, the bottom plate 30, the left side wall 12, and the top plate 20.

[0019] The front end wall 11 includes a pair of left and right first flaps 14, 14 continuously provided at the front edges of the left and right side walls 12, 12 respectively, and a pair of upper and lower second flaps 15, 15 continuously provided at the front edges of the top plate 20 and the bottom plate 30 respectively. The two second flaps 15, 15 are overlapped and joined on the outer surfaces of the two first flaps 14, 14.

[0020] In the first embodiment, the tip portions of the two first flaps 14, 14 are butted against each other, but the tip portions of the two first flaps 14, 14 may be arranged at intervals in the left - right direction. Also, in the first embodiment, the tip portions of the two second flaps 15, 15 are arranged at intervals in the up - down direction, but the tip portions of the two second flaps 15, 15 may be butted against each other. Also, in the first embodiment, the two second flaps 15, 15 are overlapped on the outer surfaces of the two first flaps 14, 14, but the two second flaps 15, 15 may be overlapped on the inner surfaces of the two first flaps 14, 14.

[0021] The rear end wall 11 has a structure that is symmetrical with the front end wall 11 in the front-rear direction. As shown in FIG. 2, it is composed of left and right first flaps 14, 14 and upper and lower second flaps 15, 15.

[0022] In the packaging box 1A of the first embodiment, as shown in FIG. 3, a plurality of PET bottles P are accommodated as contents. When stacking and transporting or storing a plurality of packaging boxes 1A, the state shown in FIG. 3 is adopted. In this state, the bottom of the PET bottle P is placed on the upper surface of the bottom plate 30, and the cap of the PET bottle P abuts against the lower surface of the top plate 20. In the first embodiment, as shown in FIGS. 4 and 5, six PET bottles P are accommodated. Three PET bottles P arranged in a row in the front-rear direction are arranged in two rows on the left and right. The PET bottle P is formed such that the upper part (spout side) is thinner than the lower part (bottom side). Also, the corners of the bottom of the PET bottle P are rounded. As a result, a gap is formed between four PET bottles P arranged in the front, rear, left, and right directions. In this way, the packaging box 1A is configured such that in a state where the PET bottle P (contents) is accommodated in the wall portion 10, gaps are respectively formed between the inner surface of the top plate 20 and a part of the outer surface of each PET bottle P, and between the inner surface of the bottom plate 30 and a part of the outer surface of each PET bottle P. The shape and size of the wall portion 10 are set accordingly.

[0023] In the packaging box 1A of the first embodiment, as shown in FIG. 1, upper and lower carrying holes 40, 40 are respectively provided in the top plate 20 and the bottom plate 30. The carrying hole 40 is a part where a hand is placed when holding the packaging box 1A (see FIG. 6).

[0024] The upper carrying hole 40 is formed at the front part of the top plate 20 as shown in FIG. 4. The carrying hole 40 is formed in a substantially triangular shape in plan view such that the width in the left-right direction becomes narrower from the rear part toward the front part. The upper handle hole 40 is formed at a position corresponding to the gap formed between the inner surface of the top plate 20 and a part of the outer surface of each PET bottle P in a state where the PET bottle P is accommodated in the wall portion 10. As shown in FIG. 3, a gap is disposed directly below the upper handle hole 40.

[0025] As shown in FIG. 4, a cover plate 41 is disposed in the handle hole 40. The cover plate 41 has the same shape as the opening shape of the handle hole 40. That is, the handle hole 40 is closed by the cover plate 41. The front edge portion of the cover plate 41 is continuously provided with the front edge portion of the handle hole 40 via a fold line, and the other edge portions of the cover plate 41 are continuously provided with the opening edge portions of the handle hole 40 via slits. Further, the cover plate 41 is divided into left and right by a slit extending in the front-rear direction.

[0026] As shown in FIG. 5, the lower handle hole 40 is formed at the front portion of the bottom plate 30. The lower handle hole 40 is formed at a position and shape that are vertically symmetric with the upper handle hole 40 (see FIG. 4). The lower handle hole 40 is also closed by the cover plate 41. The lower handle hole 40 is formed at a position corresponding to the gap formed between the inner surface of the bottom plate 30 and a part of the outer surface of each PET bottle P in a state where the PET bottle P is accommodated in the wall portion 10. As shown in FIG. 3, a gap is disposed directly above the lower handle hole 40.

[0027] When carrying the packaging box 1A of the first embodiment, as shown in FIG. 6, the orientation of the packaging box 1A is changed such that the top plate 20 and the bottom plate 30 are arranged horizontally (front-rear), and the front and rear end walls 11, 11 are arranged vertically. Thereby, the handle holes 40, 40 are respectively disposed at the upper parts of the front and rear horizontal surfaces of the packaging box 1A. When carrying the packaging box 1A, the PET bottle P is in a horizontally lying state. Subsequently, the cover plate 41 is pushed in from the outside of the handle hole 40 to open the handle hole 40. At this time, since a gap (see FIGS. 3 to 5) is formed inside the handle hole 40, it is easy to push the cover plate 41 inside the wall portion 10. Then, by grasping the two handle holes 40, 40 disposed on the side surfaces (front and rear) of the packaging box 1A respectively, the packaging box 1A can be lifted up.

[0028] As shown in FIG. 1, the packaging box 1A of the first embodiment as described above is a corrugated box in a wrap-around manner. When a plurality of packaging boxes 1A are stacked for transportation or storage, since the handle holes 40 are not disposed on the wall portion 10, a decrease in the strength of the wall portion 10 against the load from above can be prevented. Also, when carrying the packaging box 1A of the first embodiment, as shown in FIG. 6, by changing the orientation of the packaging box 1A, the two handle holes 40, 40 are disposed on the side surface of the packaging box 1A, and by grasping the two handle holes 40, 40, the packaging box 1A can be lifted up.

[0029] In the packaging box 1A of the first embodiment, as shown in FIG. 3, since the handle hole 40 is formed at a position corresponding to the gap inside the packaging box 1A, it becomes easier to insert the fingertips from the handle hole 40 into the packaging box 1A, and the hand can be surely placed on the edge of the handle hole 40.

[0030] As described above, the first embodiment of the present invention has been explained. However, the present invention is not limited to the first embodiment, and can be appropriately modified without departing from the spirit thereof. In the packaging box 1A of the first embodiment, as shown in FIG. 1, the substantially triangular handle holes 40 are formed at the front portions of the top plate 20 and the bottom plate 30. However, the position, shape, and size of the handle holes 40 are not limited, and are appropriately set according to the shape and weight of the contents.

[0031] In the first embodiment, as shown in FIG. 3, a plastic bottle P is illustrated as the content accommodated in the packaging box 1A. However, the content accommodated in the packaging box of the present invention is not limited. Also, in the case of flexible contents such as a standing pouch, when a hand is inserted into the carrying hole 40, the contents are pushed by the hand and deformed, creating a gap inside the packaging box 1A. In such a case, even if there is no gap inside the packaging box 1A before inserting the hand into the carrying hole 40, the packaging box can be held by inserting the hand into the carrying hole 40.

[0032] In the packaging box 1A of the first embodiment, as shown in FIG. 1, the carrying hole 40 is closed by the lid plate 41, but it may be configured to block a part of the carrying hole 40 with the lid plate 41. Furthermore, the lid plate 41 may not be provided inside the carrying hole 40.

[0033] The packaging box 1A of the first embodiment is a corrugated box of the wrap-around type, but the form of the box body is not limited. The packaging box 1A of the first embodiment is made of corrugated cardboard, but the packaging box may be formed of various known paperboards.

[0034] [Second Embodiment] Next, the packaging box 1B of the second embodiment will be described. As shown in FIG. 7, the packaging box 1B of the first embodiment is an A-type corrugated box including a cylindrical wall portion 50, a top plate 60 provided at the upper opening of the wall portion 50, and a bottom plate 70 provided at the lower opening of the wall portion 50. The wall portion 50 has front and rear end walls 51, 51 and left and right side walls 52, 52.

[0035] As shown in FIG. 8, the packaging box 1B of the second embodiment is formed by mountain-folding or valley-folding a blank sheet S2 obtained by cutting out a corrugated cardboard sheet at each fold line. The blank sheet S2 shown in FIG. 8 is arranged so that the inner surface side is visible. The fold lines and cutting guide lines of the blank sheet S2 have the same configuration as the blank sheet S1 (see FIG. 2) of the first embodiment.

[0036] As shown in FIG. 7, the front end wall 51 is a rectangular wall body. At the left edge of the front end wall 51, the left side wall 52 is continuously provided via a broken line, and at the right edge of the front end wall 51, the right side wall 52 is continuously provided via a broken line. The left and right side walls 52, 52 are wall bodies of the same quadrilateral shape. The left and right side walls 52, 52 are formed perpendicular to the front end wall 51. At the rear edge of the left side wall 52, the rear end wall 51 is continuously provided via a broken line. The rear end wall 51 is a wall body of the same quadrilateral shape as the front end wall 51 and is formed perpendicular to the left side wall 52.

[0037] While bending the blank sheet S2 (see FIG. 8) along each broken line, the joining piece 53 continuously provided at the rear edge of the right side wall 52 is joined to the inner surface of the rear end wall 51, thereby forming a quadrilateral cylindrical wall portion 10 by the rear end wall 51, the left side wall 52, the front end wall 51, and the right side wall 52.

[0038] The top plate 60 includes a pair of left and right first flaps 61, 61 continuously provided at the upper edges of the left and right side walls 52, 52 respectively, and a pair of front and rear second flaps 62, 62 continuously provided at the upper edges of the front and rear end walls 51, 51 respectively. The two second flaps 62, 62 are overlapped and joined on the inner surfaces of the two first flaps 61, 61.

[0039] In the second embodiment, the tip portions of the two first flaps 61, 61 are butted against each other, but the tip portions of the two first flaps 61, 61 may be arranged at intervals in the left - right direction. In the second embodiment, the tip portions of the two second flaps 62, 62 are arranged at intervals in the front - rear direction, but the tip portions of the two second flaps 62, 62 may be butted against each other. In the second embodiment, the two second flaps 62, 62 are overlapped on the inner surfaces of the two first flaps 61, 61, but the two second flaps 62, 62 may be overlapped on the outer surfaces of the two first flaps 61, 61.

[0040] The bottom plate 70 has a structure symmetric to the top plate 60 in the vertical direction and is composed of left and right first flaps 71, 71 and front and rear second flaps 72, 72 as shown in FIG. 11.

[0041] As shown in FIG. 9, inside the packaging box 1B of the second embodiment, six plastic bottles P are accommodated as contents, similar to the packaging box 1A of the first embodiment (see FIG. 3). When stacking and transporting or storing a plurality of packaging boxes 1B, the state shown in FIG. 9 is adopted. In this state, the bottom of the plastic bottle P is placed on the upper surface of the bottom plate 70, and the caps of some of the plastic bottles P abut against the lower surface of the first flap 61 of the top plate 60. Also in the packaging box 1B, with the plastic bottle P (contents) accommodated in the wall portion 10, the shape and size of the wall portion 50 are set so that a gap is formed between the inner surfaces of the top plate 60 and the bottom plate 70 and a part of the outer surface of each plastic bottle P.

[0042] In the packaging box 1B of the second embodiment, as shown in FIG. 7, upper and lower carrying holes 80, 80 are respectively provided in the top plate 60 and the bottom plate 70.

[0043] As shown in FIG. 10, the upper carrying hole 80 is formed at the front portion of the butting portion of both first flaps 61, 61 on the top plate 60. The carrying hole 80 is formed in a substantially triangular shape in plan view such that the width in the left - right direction becomes narrower from the rear portion to the front portion. The left half of the carrying hole 80 is formed in the left - hand first flap 61, and the right half of the carrying hole 80 is formed in the right - hand first flap 61. The upper carrying hole 80 is formed at a position corresponding to the gap formed between the inner surface of the top plate 60 and a part of the outer surface of each plastic bottle P in a state where the plastic bottle P is accommodated in the wall portion 50. As shown in FIG. 9, a gap is disposed directly below the upper carrying hole 80.

[0044] In the carrying hole 80 of the second embodiment, as shown in FIG. 10, a cover plate 81 is disposed in the same manner as the carrying hole 40 (see FIG. 4) of the first embodiment, and the carrying hole 80 is closed by the cover plate 81.

[0045] The front end of the handle hole 80 in the second embodiment is overlapped with the tip of the second flap 62. At the tip of the second flap 62, a recess 82 is formed in the portion overlapping the handle hole 80 in accordance with the shape of the handle hole 80, as shown in FIG. 8. Note that the inside of the recess 82 is closed by a lid flap 83.

[0046] As shown in FIG. 11, the lower handle hole 80 is formed at the front part of the bottom plate 70. The lower handle hole 80 is formed at a position and in a shape that is vertically symmetric with the upper handle hole 80 (see FIG. 10). The lower handle hole 80 is also closed by a lid plate 81. Further, a recess 82 is also formed at the tip of the lower second flap 62, as shown in FIG. 8. The lower handle hole 80 is formed at a position corresponding to a gap formed between the inner surface of the bottom plate 70 and a part of the outer surface of each PET bottle P in a state where the PET bottles P are accommodated in the wall portion 50. As shown in FIG. 3, a gap is disposed directly above the lower handle hole 80.

[0047] When carrying the packaging box 1B of the second embodiment, as shown in FIG. 12, the orientation of the packaging box 1B is changed so that the top plate 60 and the bottom plate 70 are arranged horizontally (front and back), and the front and rear end walls 51, 51 are arranged vertically. Thereby, the handle holes 80, 80 are respectively disposed at the upper parts of the front and rear horizontal surfaces of the packaging box 1B. Note that when carrying the packaging box 1B, the PET bottles P (see FIG. 9) are in a lying-down state. Subsequently, the lid plate 81 and the lid flap 83 (see FIG. 8) are pushed in from the outside of the handle hole 80 to open the handle hole 80. At this time, since a gap (see FIGS. 10 to 11) is formed inside the handle hole 80, it is easy to push the lid plate 81 and the lid flap 83 (see FIG. 8) inside the wall portion 50. Then, by grasping the two handle holes 80, 80 disposed on the horizontal surfaces (front surface and rear surface) of the packaging box 1B, the packaging box 1B can be lifted.

[0048] As shown in FIG. 7, the packaging box 1B of the second embodiment as described above is a corrugated box of type A. When a plurality of packaging boxes 1B are stacked and transported or stored, since the hanging holes 80 are not arranged in the wall portion 50, it is possible to prevent a decrease in the strength of the wall portion 50 against a load from above. Also, when holding the packaging box 1B of the second embodiment, as shown in FIG. 12, by changing the orientation of the packaging box 1B, both hanging holes 80, 80 are arranged on the lateral surface of the packaging box 1B, and by hanging hands on both hanging holes 80, 80, the packaging box 1B can be lifted.

[0049] In the packaging box 1B of the second embodiment, as shown in FIG. 9, since the hanging hole 80 is formed at a position corresponding to the gap inside the packaging box 1B, it becomes easier to insert the fingertips from the hanging hole 80 into the packaging box 1B, and hands can be surely hung on the edge of the hanging hole 80. Furthermore, when lifting the packaging box 1B of the second embodiment, as shown in FIG. 12, since hands are placed on both the first flaps 61, 61 and the second flap 62, the hanging hole 80 is difficult to be deformed.

[0050] Although the second embodiment of the present invention has been described above, the present invention is not limited to the second embodiment, and similar to the first embodiment, it can be appropriately changed without departing from the gist thereof. Also in the second embodiment, similar to the first embodiment, the contents are not limited. Also in the second embodiment, similar to the first embodiment, in the case of flexible contents, even if there is no gap formed inside the packaging box 1B in the state before inserting hands into the hanging hole 40, hands can be inserted into the hanging hole 40 to hold the packaging box.

[0051] In the second embodiment, the shape of the hanging hole is not limited. For example, as in the packaging box assembled from the blank sheet S3 of FIG. 13, an oval-shaped hanging hole 90 that is wide in the left-right direction may be formed in the first flaps 61, 71, and a recess 91 corresponding to the hanging hole 90 may be formed at the leading edge of the second flaps 62, 72.

Explanation of Reference Numerals

[0052] 1A Packaging Box (First Embodiment) 1B Packaging Box (Second Embodiment) 10 Wall Portion (First Embodiment) 11 End Wall (First Embodiment) 12 Side Wall (First Embodiment) 13 Joint Piece (First Embodiment) 14 First Flap (First Embodiment) 15 Second Flap (First Embodiment) 20 Top Plate (First Embodiment) 30 Bottom Plate (First Embodiment) 40 Hanging Hole (First Embodiment) 41 Cover Plate (First Embodiment) 50 Wall Portion (Second Embodiment) 51 End Wall (Second Embodiment) 52 Side Wall (Second Embodiment) 53 Joint Piece (Second Embodiment) 60 Top Plate (Second Embodiment) 61 First Flap (Second Embodiment) 62 Second Flap (Second Embodiment) 70 Bottom Plate (Second Embodiment) 71 First Flap (Second Embodiment) 72 Second Flap (Second Embodiment) 80 Hanging Hole (Second Embodiment) 81 Cover Plate (Second Embodiment) 82 Depression Portion (Second Embodiment) 83 Cover Flap P PET Bottle 90 Hanging Hole (Variant of Second Embodiment) 91 Depression Portion (Variant of Second Embodiment) S1 Blank Sheet (First Embodiment) S2 Blank Sheet (Second Embodiment) S3 Blank Sheet (Variant of Second Embodiment)

Claims

1. a wall portion having front and rear end walls and left and right side walls; a top plate connected to an upper edge of the wall; A bottom plate connected to a lower edge portion of the wall portion, A packaging box, characterized in that the top plate and the bottom plate are formed with hand holes.

2. The packaging box according to claim 1, The shape and size of the wall portion are set so that, in a state where contents are contained within the wall portion, a gap is formed between an inner surface of the top plate and at least a part of the contents, and a gap is formed between an inner surface of the bottom plate and at least a part of the contents, The packaging box is characterized in that the handle hole is formed at a position corresponding to the gap.

3. The packaging box according to claim 1, The bottom plate, the side walls and the top plate are connected to each other in a cylindrical shape, The end wall is Left and right first flaps respectively connected to the side walls; and upper and lower second flaps respectively connected to the top plate and the bottom plate, A packaging box, characterized in that the second flaps are overlapped on the outer or inner surfaces of the first flaps.

4. The packaging box according to claim 1, The end walls and the side walls are connected to each other in a cylindrical shape, The top plate and the bottom plate are Left and right first flaps respectively connected to the side walls; and front and rear second flaps respectively connected to the top plate and the bottom plate, A packaging box, characterized in that the second flaps are overlapped on the outer or inner surfaces of the first flaps.

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