JP2009280211A - Packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging box which has superior shock-absorbing performance to the shock in the predetermined direction and is easily assembled from a sheet of box body forming piece. <P>SOLUTION: A pair of shock-absorbing pieces 48 and 76 having a length exceeding the length from base ends to fore ends of third and fourth side faces are provided on the fore ends of the third and fourth side faces 20 and 22. Further, there are provided first slope parts 48a and 76a forming steep slopes on a bottom surface 14 from folding ruled lines 50 and 78 to fore end sides of the shock-absorbing pieces 48 and 76 in an assembled state of a box body forming piece 12, second slope parts 48b and 76b which are folded in the center direction of the bottom surface 14 at ends of the fore end sides of the shock-absorbing pieces to form gentle slopes on the bottom surface 14 from folding ruled lines 52 and 80 to the fore end sides of the shock-absorbing pieces, and abutting parts 48c and 76c which are respectively folded in the third and fourth side face directions at the ends on the fore end sides of the shock-absorbing pieces and abutted on the bottom surface 14 from the folding ruled lines 54 and 82 to the fore ends. A pair of engagement pieces 56 and 84 to be positioned in the erected state are provided on each side end on the first side face side of the third and fourth side faces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packaging box for packing electronic equipment such as a switching power supply device.

  2. Description of the Related Art Conventionally, there is a packaging box that is assembled by bending a box-forming piece that is integrally punched from a blank sheet, and that integrally has a buffering function for the contents. For example, Patent Document 1 includes a double lid portion and a double bottom portion that are formed by bending a lid flap and a bottom flap, and the contents utilize steps provided in the double lid portion and the double bottom portion. There is disclosed a packaging box having a buffer structure that is housed in a housing recess and is supported with a predetermined gap from the six peripheral walls of the box.

Also, a box body piece integrally punched from the blank sheet and a support member for supporting the contents are separately formed, and the box body and the support member assembled by bending the box body piece are formed. What combined and comprised the packaging box integrally is also put to practical use.
JP 2002-249127 A

  However, the packaging box of Patent Document 1 has a complicated structure, a large number of bendings, and is difficult to assemble. In addition, since this packing box has a shock absorbing structure that is effective against impacts in almost all directions, for example, it is clear how the packaged items are handled, and the direction of the shock applied to the packing box. When used in applications that are known to be in a nearly constant direction, there is a problem in that the packing box is unnecessarily large because it is a packing box that also has a shock absorbing structure in the part where no impact is applied. .

  In addition, a packaging box provided with a box-forming piece and a supporting member separately is configured by combining at least two or more members, so that the assembly work becomes complicated and the material cost of the packaging box itself is increased. There was a problem such as an increase in management costs.

  The present invention has been made in view of the above-described background art, and has a superior buffering performance against an impact in a predetermined direction, and can be easily assembled from a single box-forming piece. The purpose is to provide.

  The present invention comprises a box-forming piece integrally punched from one blank sheet, and the box-forming piece is provided in a pair at a rectangular bottom surface and one end of the bottom surface facing each other. The first and second side surfaces, the third and fourth side surfaces provided in a pair at the other end of the bottom surface facing each other, and the tip side of the first side surface, the box A packaging box comprising an outer lid piece for closing an opening of the box formed on the first to fourth side surfaces when the body-forming piece is in an assembled state, wherein the third and fourth A pair of buffer pieces having a length exceeding the length from the base end portion to the tip of the third and fourth side surfaces is provided at the tip of the side surface. The buffer piece is bent inward on the base end side of the buffer piece when the box-forming piece is in an assembled state, and is directed from the crease line toward the tip side of the buffer piece with respect to the bottom surface. A first slope part forming a steep slope, and the buffer piece front end side end part of the first slope part is bent toward the bottom center, and from the crease line toward the buffer piece tip side, the bottom face A second inclined surface portion that forms a gentle inclined surface, and the buffer piece front end side end portion of the second inclined surface portion is bent in the third and fourth side directions, respectively, and the front end from the crease line And a contact portion that contacts the bottom surface. At each side end on the first side surface side of the third and fourth side surfaces, the box-forming pieces are engaged with each other when assembled, and the third and fourth side surfaces are erected. A pair of engaging pieces for positioning is provided, and the pair of buffer pieces and the pair of engaging pieces are connected to side edges adjacent to each other, and when the box forming piece is in an assembled state, A first connecting portion for positioning the pair of buffer pieces and the pair of engagement pieces is provided. Each side end of the second side surface and each side end of the second side surface side of the third and fourth side surfaces, when the box-forming piece is in an assembled state, A second connecting portion for positioning the third and fourth side surfaces is provided.

  Further, a convex portion is provided at each of the tip ends of the abutting portions of the pair of buffer pieces, and the convex portions are proximal ends of the third and fourth side surfaces when the box-forming piece is in the assembled state. Are each fitted and positioned in a cut formed between the portion and the bottom surface.

  An outer lid-side insertion piece is provided at the distal end of the outer lid piece, an inner lid piece is provided at the distal end of the second side surface, and the second side surface includes the second side portion from the second side portion. An inner lid side insertion piece formed by an incision reaching the inner lid piece portion is provided, and when the box forming piece is in an assembled state, the outer lid piece overlaps the outer lid piece, and the outer lid The side insertion piece is inserted into a notch formed at the base end portion of the inner lid piece, and the distal end portion of the inner lid side insertion piece is inserted into a notch formed at the base end portion of the outer lid piece. Thus, each part is positioned in a state in which the opening of the box formed on the first to fourth side surfaces is closed by the outer lid piece.

  The packaging box of the present invention has an excellent buffering function against impacts in the side and bottom directions where impact is easily applied during transportation and transportation. Furthermore, even when the stack is placed with the bottom side down, the impact applied to the stored item can be reduced by the space between the stored item and the bottom surface.

  Moreover, since it is composed of a single box-forming piece and can be easily assembled, the material cost and management cost of the packaging box itself can be reduced. Furthermore, the parts that do not need to have a cushioning function are configured so that no useless space is created between the stored items and the peripheral wall of the box, so the outer shape of the packaging box in the assembled state should be made compact. And the efficiency of transportation and transportation can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show an embodiment of the present invention. A packaging box 10 according to this embodiment is formed by assembling a box-forming piece 12 formed by punching a blank sheet such as cardboard. Is formed. Here, as shown in FIG. 1, in the assembled rectangular parallelepiped packaging box 10, the longitudinal dimension is W, the transverse dimension is D, and the height dimension is H. It is defined as

  FIG. 5 is a developed view of the box-forming piece 12 as viewed from the back side. The box-forming piece 12 is provided with a rectangular bottom surface 14 at the center and a pair of end portions facing the short side direction of the bottom surface 14. A first side surface 16 and a second side surface 18 are provided, and a third side surface 20 and a fourth side surface 22 are provided at a pair of end portions facing the longitudinal direction of the bottom surface 14.

  The dimension in the width direction orthogonal to the direction in which the side surfaces 16, 18 and the bottom surface 14 are connected is substantially equal to W on each surface, and the dimension in the width direction orthogonal to the direction in which the side surfaces 20, 22 and the bottom surface 14 are connected is D is almost equal on the surface. Further, the length dimension from each crease line on the bottom surface 14 side of each of the side surfaces 16, 18, 20, and 22 to each crease line on the opposite end is substantially equal to H. The bottom surface 14 and the four side surfaces 16, 18, 20, 24 are separated by crease lines 26, 28, 30, 32 formed so as to compress the thickness of the box-forming piece 12. Further, in the central portions of the crease lines 28 and 30, cuts 28a and 30a each having a length of about one-half of the dimension D are provided.

  An outer lid piece 32 is provided at the end of the side surface 16 opposite to the crease line 24 and separated by a crease line 34. Further, an outer lid side insertion piece 36 is provided by being separated by a crease line 38 in the center of the opposite end of the crease line 32 of the outer lid piece 32.

  The outer lid piece 32 is a rectangle having substantially the same shape as the bottom surface 14. The outer lid side insertion piece 36 has a width of about two thirds of the longitudinal length W of the outer lid piece 32, and the length from the crease line 38 to the protruding end is about two minutes of the dimension H. Has a length of 1. In addition, a notch 38a having a length about one half of the crease line 38 is formed in the center portion of the crease line 38, and both ends of the notch 38a extend in the shape of a dogleg to the portion of the outer lid piece 32. Yes. Furthermore, a substantially semicircular cut-out finger hook 40 is provided at the central portion of the boundary between the outer lid piece 32 and the notch 38a. An inner lid piece 42 is provided at the end of the side surface 18 opposite to the crease line 26 and separated by a crease line 44. The inner lid piece 42 has a width slightly shorter than the length W in the longitudinal direction of the side surface 18, and the length from the crease line 44 to the protruding end has a length of about one half of the dimension D. A notch 44a slightly longer than the width of the outer cover side insertion piece 36 is formed in the center portion of the crease line 44, and both ends of the notch 44a extend in a dogleg shape at the side 18 portion.

  Further, an inner lid side insertion piece 46 is provided by a U-shaped notch extending over the side surface 18 and the substantially central portion of the inner lid piece 42. The inner lid side insertion piece 46 has a slightly shorter width than the crease line 38 a on the base end side of the outer lid side insertion piece 36. The inner lid side insertion piece 46 is separated from the side face 18 by a crease line 46a provided in parallel to the crease line 26 at the base end portion, and a crease line 46b is provided on the substantially same line as the crease line 44a. It has been.

  A buffer piece 48 is provided at the end of the side surface 20 opposite to the crease line 28 and separated by a crease line 50. The buffer piece 48 is substantially rectangular, the width is slightly shorter than the width dimension D of the side surface 20, and the length from the crease line 50 on the base end side to the protruding end is approximately twice the dimension H. It is.

  The buffer piece 48 is divided into three parts by crease lines 52 and 54 provided in parallel to the crease line 50. A portion delimited by the crease line 50 and the crease line 52 facing the crease line 50 with a dimension α therebetween is a first slope portion 48a that forms a steep inclined surface in an assembled state. A portion delimited by the crease line 52 and the crease line 54 facing the crease line 52 with a dimension β is a second inclined surface portion 48b that forms a slanted inclined surface in the assembled state. A portion that is divided by the crease line 54 and has a protruding end at the position of the dimension γ from the crease line 54 is a contact portion 48c that is a surface that contacts the bottom surface 14 in the assembled state. Furthermore, a convex portion 48d is provided at the central portion of the protruding end of the contact portion 48c. The convex portion 48 d has a width slightly shorter than the length of the base cut 28 a of the side surface 18, and the protruding length has a length corresponding to the thickness of the box forming piece 12. The length α of the first inclined surface portion 48a, the length β of the second inclined surface portion 48b, the length γ of the contact portion 48c, and the length H of the side surface 20 are H> α, γ> β, α + β. > H is satisfied.

  Engagement pieces 56 are provided on the side end portion of the side surface 20 on the side surface 16 side, separated by a crease line 58. The engaging piece 56 has a width slightly shorter than the width D of the side surface 20, and the length from the crease line 58 at the base end to the protruding end is about two-thirds of the width W. Then, the engagement piece 56 is located at a position having a length of about one half of the width W from the root crease line 58 and from the outer end (left side in FIG. 5) to the inner side (right side in FIG. 5). A slit 56a is provided. The slit 56 a is about three times as wide as the thickness of the box-forming piece 12, and the length is about one half of the width dimension of the engaging piece 56 in the short direction. The corner portions on both sides of the slit 56a of the engagement piece 56 have a gently chamfered curved shape.

  The side end portions on the side where the engaging piece 56 and the first inclined surface portion 48a are close to each other are connected by a fan-shaped connecting portion 60 having a central angle of approximately 90 degrees. The connecting portion 60 and the engaging piece 56 are separated by a crease line 62, the connecting portion 60 and the first slope portion 48a are separated by a crease line 64, and the linking portion 60 itself is substantially collinear with the crease line 24. A crease line 66 is provided at the location.

  The side end portions of the side surface 20 and the side surface 18 that are close to each other are connected by a fan-shaped connecting portion 68 having a central angle of approximately 90 degrees. The connecting portion 68 and the side surface 20 are separated by a crease line 70, the connecting portion 68 and the side surface 18 are separated by a crease line 72, and the connecting portion 68 itself is provided with a crease line 74 at a central angle of about 45 degrees. It has been.

  The respective portions provided on the side surface 22 and the peripheral end portion thereof are opposed to the respective portions provided on the side surface 20 and the peripheral end portion thereof with the bottom surface 14 interposed therebetween. Here, the portions corresponding to the buffer piece 48 on the side surface 20 side, the first inclined surface portion 48a, the second inclined surface portion 48b, the contact portion 48c, the convex portion 48d, and the crease lines 52 and 54 described above are respectively side surfaces. 22 side buffer pieces 76, first slope portion 76a, second slope portion 76b, contact portion 76c, convex portion 76d, and crease lines 80 and 82. Further, the portions corresponding to the engagement piece 56, the slit 56a, and the crease line 58 on the side surface 20 described above are the engagement piece 84, the slit 84a, and the crease line 86 on the side surface 22, respectively. Further, the portions corresponding to the connecting portion 60 and the crease lines 62, 64, and 66 on the side surface 20 described above are the connecting portion 88 and the crease lines 90, 92, and 94 on the side surface 22 side, respectively. The portions corresponding to the connecting portion 68 and the crease lines 70, 72, and 74 on the side surface 20 described above are the connecting portion 96 and the crease lines 98, 100, and 102 on the side surface 22 side, respectively.

  Here, in each part on the side surface 22 side, a part formed asymmetrically with each part on the side surface 20 side is an engagement piece 84. The slit 84a of the engagement piece 84 is located at a position about a half of the width W from the crease line 86 at the base of the engagement piece 84, and from the inner (left side in FIG. 5) end to the outside (FIG. 5). In the right direction). That is, the shape of the slit 84a itself is the same as that of the slit 56a, but the direction is formed in the same direction in FIG. Parts other than the engagement piece 84 are formed in symmetrical shapes.

  Next, an example of an assembly method of the packaging box 10 of this embodiment will be described. 5 is a view of the back surface of the box-forming piece 12 of the packaging box 10. In the following description, the folding method in which the front 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.

  The box-forming piece 12 is placed on a work desk or the like used by an operator, and is assembled from a pair of side surfaces 20 and 22 and respective portions provided at the peripheral end portions thereof. First, in the state where the bottom surface 14 is in contact with the surface of the work table, the crease lines 52 and 80 are folded in the buffer pieces 48 and 76 while the crease lines 54 and 82 are normally folded, and the crease lines 50 and 62 are further folded. And the crease lines 78 and 90 are normally folded. Then, the second inclined surface portion 48b and the contact portion 48c, which are normally folded at the crease line 54, are clamped with fingers, and the protrusion 48d at the protruding end of the contact portion 48c is held at the base end portion of the side surface 20. Guide and insert into the cut 28a. Similarly, the second inclined surface portion 76b and the contact portion 76c, which are normally folded at the crease line 82, are sandwiched with fingers, and the protruding portion 76d at the protruding end of the contact portion 76c is cut at the root of the side surface 22. Guide to 30a and insert.

  Then, in this state, the contact portion 48c is almost upright, and the first slope portion 48a and the second slope portion 48b have different angles from each other due to the relationship of H> α, γ> β, α + β> H described above. The inclined surface is three-dimensionally formed. Similarly, the abutting portion 76c is also almost upright, and the first inclined surface portion 76a and the second inclined surface portion 76b form inclined surfaces having mutually different angles in a three-dimensional manner.

  Next, while maintaining the shape of each of the slope portions, the crease line 58 is normally folded so that the engagement piece 56 is pulled up from the surface side with a finger, and the engagement piece 56 is made to stand upright. Then, by this operation, the crease line 64 of the connecting portion 60 is simultaneously forward-folded, and the crease line 66 is simultaneously reverse-folded. Similarly, the crease line 86 is folded forward so that the engagement piece 84 is pulled up from the surface side with a finger, and the engagement piece 84 is made upright. Then, the crease line 92 of the connecting part 88 is simultaneously forward-folded, and the crease line 94 is simultaneously reverse-folded.

  Next, the crease line 28 and the crease line 72 are normally folded, and the side surface 20 and the connecting portion 68 are brought upright. Then, the engagement piece 56 stands upright on the crease line 24 at the base of the side surface 16, and the slit 56 a is cut upward. At this time, since the convex portion 48d at the protruding end of the contact portion 48c is fitted in the cut 28a, the contact portion 48c contacts the bottom surface 14 while the three-dimensional shape of each inclined surface portion 48a, 48b is maintained. 20 becomes an upright state.

  Next, the crease line 30 and the crease line 100 are normally folded, and the side face 22 and the connecting portion 96 are brought upright. Then, the engagement piece 84 moves onto the upright engagement piece 56, and the slit 84a with the cut-in opening downward is engaged with the slit 56a with the cut-out opening arranged upward. At this time, since the corners on both sides of the slits 56a and 84a are formed in a gently chamfered curved shape, the engaging pieces 56 and 84 are smoothly inserted while intersecting each other. Further, the convex portion 76d at the protruding end of the contact portion 76c is fitted in the notch 30a, and the contact portion 76c contacts the bottom surface 14 while maintaining the three-dimensional shape of each of the slope portions 76a and 76b. Is upright.

  The assembled state at this time is shown in FIG. The side surfaces 20 and 22 are self-standing substantially perpendicular to the bottom surface 14 by the engagement of the slits 56 a and 84 a of the engagement pieces 56 and 84. Further, the positions of the buffer pieces 48 and 76 with respect to the engaging pieces 56 and 84 are determined by the connecting portions 60 and 88, and the first slope portions 48 a and 76 a are inclined at a steep angle with respect to the bottom surface 14. A second inclined surface portion 48b, 76b forms an inclined surface having a gentle angle.

  Next, an electronic device that is an accommodation is placed from above the bottom surface 10. Here, the accommodation is a switching power supply device 110 which is a kind of electronic equipment. As shown in FIG. 3, the switching power supply device 110 includes a printed circuit board 112 formed in a substantially rectangular shape. A large electronic component 116 having lead terminals 118 and a heat generating component (not shown) are attached to the upper surface of the printed circuit board 112. The heat radiating plate 114 is disposed, and the lead terminal 116a is inserted through the through hole and connected to the land on the back surface. A low-profile small electronic component 118 is surface-mounted on the lower surface. The dimension of the switching power supply 110 in the longitudinal direction is determined by the dimension of the printed circuit board 112 and is substantially equal to the interval between the opposing crease lines 52 and 80 as shown in FIG. Further, the dimension in the short direction of the switching power supply device 110 is slightly smaller than the dimension D of the packaging box 10.

  In the switching power supply 110, both ends in the longitudinal direction of the printed circuit board 112 are supported by the opposing crease lines 52 and 80, respectively. At this time, the small electronic component 120 and the lead terminal 118 disposed on the lower surface side of the printed circuit board 112 are located above the bottom surface 14 with a predetermined space therebetween, and the upper ends of the large electronic component 116 and the heat sink 114 are These are located at substantially the same height as the upper ends of the side surfaces 20 and 22.

  Next, the crease line 26 is normally folded so that the side surface 18 is pulled up from the surface side with a finger, and the side surface 18 is brought upright. At the same time, the crease lines 70 and 72 and the crease lines 98 and 100 of the connecting portions 68 and 96 are folded forward, and the crease lines 74 and 102 are folded in reverse. Then, the connecting portions 68 and 96 are folded along the crease line 26, and positions between the side end portions on the side of the connecting portions 68 and 96 of the side surfaces 20 and 22 and both ends of the side surface 18. Is determined.

  Next, the crease line 44 is folded forward so that the inner lid piece 42 is bent at a substantially horizontal angle. At this time, the inner lid side insertion piece 46 remains upright. Then, the crease line 24 is normally folded to erect the side face 16, and the crease line 34 is further folded to make the outer lid piece 32 a horizontal angle. At this time, the outer lid-side insertion piece 36 is normally folded almost simultaneously with the folding of the crease line 34, and the outer lid piece 32 is turned down, and the outer lid-side insertion piece 36 is turned into the notch 44a. Plug in.

  Next, the inner lid side insertion piece 46 is reversely folded along the crease line 46a and forwardly folded along the crease line 46b. Then, the inner lid side insertion piece 46 is inserted into the notch 38a while returning the reverse folding state of the crease line 46a, and the assembly is completed as shown in FIG.

  It should be noted that the finger rest 40 does not particularly function for assembly work. The finger hook 40 is a notch used when unpacking the assembled packaging container 10 so that the inner lid side insertion piece 46 can be easily extracted from the notch 38a.

  As described above, the packaging box 10 can be easily and efficiently assembled with a very small number of folds while the box-forming piece 12 is placed on the work table. Further, if each crease line is temporarily folded and a slight angle is given to the folding direction at the manufacturing stage of the box forming 12, the working efficiency when the operator actually wraps can be further improved.

  In addition, since the switching power supply device 110 is supported by the buffer structure as described above, even if an impact is applied from the outside of the packaging box 10 in the direction in which the side surfaces 20 and 22 face each other, the buffer pieces 48 and 76 are buffered. Due to the action, a large impact is not transmitted to the switching power supply device 110 itself, and it is safe.

  For example, when the switching power supply 110 is transported using the transport bucket 120, as shown in FIG. 4A, the buckets 122 may be packed in the bucket 122 so that the side surfaces 20 and 22 face each other vertically. When the transporter holds the pair of handles 122a to lift the bucket 122 and put it on the floor, the most concerned is the impact applied in the vertical direction, as shown in FIG. 4 (a). If packed, it is safe.

  Also, except for accidents such as accidentally dropping the bucket 122, a large impact is not applied from the side of the bucket 122 in the horizontal direction. The switching power supply device 110 is sufficiently protected by the buffering performance of the cardboard material. Accordingly, no special space is provided for buffering on the peripheral wall surface (outer lid piece 32, side surfaces 16 and 18) where there is no concern that an impact of a certain level or more will be applied from the outside of the packaging box 10, and only that much. Since the outer shape of the packaging box 10 in an assembled state becomes compact, the number of switching power supply devices that enter the bucket 122 is increased, and transportation efficiency is good.

  In addition, when stored for a long time in a packaged state, for example, as shown in FIG. 4B, the packaging box 12 may be placed with the bottom surface 14 facing down. Even in this case, the small electronic component 120 and the like on the lower surface side of the printed circuit board 112 are held with a certain space from the bottom surface 14, so that a slight impact is applied in the vertical direction when being stacked. However, the cushioning action of the pair of cushioning materials 48 and 76 does not apply stress to these components, and is safe.

  Although the switching power supply device 110 is supported at both ends of the printed circuit board 112 in the longitudinal direction, the weight of the large electronic component 116 is sufficiently light, so that the printed circuit board 112 is not warped. Further, if the heat sink 114 is fixed at a plurality of positions in the longitudinal direction of the printed circuit board 112 as in the switching power supply device 110, the printed circuit board 112 is warped even if the large electronic component 116 is slightly heavy. No problem arises.

  Note that the packaging box of the present invention is not limited to the above embodiment, and the length α of the first slope portion 48a, the length β of the second slope portion 48b, and the length γ of the contact portion 48c. Is appropriately set according to the shape of the contents. For example, in the switching power supply device 110, when the height of the electronic component arranged on the upper surface side is lower than the height of the electronic component arranged on the lower surface side, the length α of the first inclined surface portion 48a is What is necessary is just to set so that it may become shorter than the length (beta) of the 2nd slope part 48b.

  Further, the pair of buffer pieces 48 and 76 may be provided on the side surface in the longitudinal direction of the packaging box 10, and in that case, since the area for supporting the contents becomes wide, in particular, from the outer lid piece 32 to the bottom surface 14. It is possible to improve the buffering performance against stress in the direction.

  Further, if there is no problem in assembling workability due to the size of the buffer pieces 48 and 76 and the strength of the box-forming piece 12, the convex portions 48d and 76d and the cuts 28a and 30a may not be provided. In addition, even if these are not provided, there is almost no influence on performance such as buffering properties as a packaging box.

  The material of the box-forming piece 12 is not particularly limited, such as various cardboards or cardboard, and can be appropriately selected according to the size and weight of the contents.

It is a perspective view which shows the assembly state of the packaging box of one Embodiment of this invention. It is a partially broken perspective view which shows the state in the middle of the assembly of the packaging box of this embodiment. It is a longitudinal cross-sectional view which shows the mode of the accommodation accommodated in the packaging box of this embodiment. They are the perspective view (a) which shows a mode that the accommodation accommodated in the packaging box of this embodiment was packed in the bucket, and the perspective view (b) which shows a mode that it was piled up on the floor. It is an expanded view of the packaging box of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging box 12 Box-forming piece 14 Bottom surface 16, 18, 20, 22 Side surface 28a, 30a, 38a, 44a Cut 32 Outer cover piece 36 Outer cover side insertion piece 42 Inner cover piece 46 Inner cover side insertion piece 48 , 76 Buffer pieces 48a, 76a First slope portions 48b, 76b Second slope portions 48c, 76c Abutting portions 48d, 76d Protruding portions 56, 84 Engagement pieces 56a, 84a Slits 60, 68, 88, 96 Connecting portions

Claims (3)

It consists of a box-forming piece that is integrally punched from one blank sheet, and the box-forming piece has a quadrilateral bottom surface and a pair of first provided at one end of the bottom surface facing each other. And a second side surface, a third and fourth side surface provided in a pair at the other end of the bottom surface facing each other, and a tip side of the first side surface, wherein the box-forming piece is In a packaging box provided with an outer lid piece for closing an opening of a box formed on the first to fourth side surfaces in an assembled state,
At the distal ends of the third and fourth side surfaces, a pair of buffer pieces having a length exceeding the length from the proximal end portion to the distal end of the third and fourth side surfaces is provided,
The buffer piece is bent inward on the base end side of the buffer piece when the box-forming piece is in an assembled state, and is directed from the crease line toward the tip side of the buffer piece with respect to the bottom surface. A first slope forming a steep slope;
A second slope forming a gentle slope with respect to the bottom surface from the crease line toward the distal end side of the buffer piece, bent toward the center of the bottom surface at the end of the first slope portion on the tip side of the buffer piece; The slope,
A second contact portion that is bent in the third and fourth side directions at the end of the buffer piece on the second slope portion, and that contacts the bottom surface from the crease line to the tip;
At each side end on the first side surface side of the third and fourth side surfaces, the box forming piece is engaged with each other when assembled, and the third and fourth side surfaces are erected. A pair of engaging pieces for positioning is provided,
The pair of cushioning pieces and the pair of engaging pieces are connected to each other adjacent side ends, and when the box forming piece is in an assembled state, the pair of cushioning pieces and the pair of engaging pieces And a first connecting part for positioning
Each side end of the second side surface and each side end of the second side surface side of the third and fourth side surfaces, when the box forming piece is in an assembled state, A packaging box comprising a second connecting portion for positioning the third and fourth side surfaces.   Convex portions are respectively provided at the tips of the contact portions of the pair of buffer pieces, and the convex portions are arranged to be connected to the base end portions of the third and fourth side surfaces when the box-forming piece is in the assembled state. The packaging box according to claim 1, wherein the packaging box is positioned by being fitted into a notch formed between the bottom surface and the bottom surface. An outer lid-side insertion piece is provided at the distal end of the outer lid piece, an inner lid piece is provided at the distal end of the second side surface, and the second side surface includes the second side portion from the second side portion. An inner lid side insertion piece formed by an incision reaching the inner lid piece portion is provided, and when the box forming piece is in an assembled state, the outer lid piece overlaps the outer lid piece, and the outer lid The side insertion piece is inserted into a notch formed at the base end portion of the inner lid piece, and the distal end portion of the inner lid side insertion piece is inserted into a notch formed at the base end portion of the outer lid piece. 3. The packaging box according to claim 1, wherein each part is positioned in a state in which an opening of the box formed on the first to fourth side surfaces is closed by the outer lid piece. .

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