JP6410084B2 - Packaging box assembly method - Google Patents

Description

The present invention relates to a packaging box, and more particularly to a packaging box assembling method that can be in either a suspended display state or a non-suspended display state.

  Some conventional packaging boxes can be in either a suspended display state or a non-suspended display state (see, for example, Patent Document 1). In the packaging box described in Patent Document 1, although details are omitted, a cover plate is provided on the front upper side of the bottomed rectangular tube-shaped box body having an opening on the upper side in an assembled state. Locking pieces are provided on the left side and right side of the tip side, and a protruding piece is provided at the center of the tip side of the cover plate between the two locking pieces. For inserting the hanging piece between the protruding piece and the cover plate A slit is provided, a hanging piece having a two-layer structure is provided at the center of the rear upper side of the box body, and an auxiliary cover plate is provided on the upper side of the left side and the upper side of the right side of the box body.

JP-A-5-254539

  When the above-mentioned conventional packaging box is put into a non-hanging display state, first, the two auxiliary lid plates are bent 90 ° inward at the base, and the left side of the opening of the box main body with the two auxiliary lid plates folded. Cover the right and left sides. Next, the hanging piece is bent 90 ° inward at its root. Next, with the two locking pieces and the projecting piece bent 90 ° inward at the base, the two locking pieces are rearward of the opening of the box body while bending the cover plate 90 ° inward at the base. The two auxiliary lid plates folded by the folded lid plate and the suspended hanging are inserted into the left inner side and the right inner side of the left side and locked, and the projecting piece is placed along the outer side of the rear central portion of the opening of the box body. Cover the opening of the box body containing the piece. In this state, since the suspended piece is covered with the cover plate, the packaging box is in a non-suspended display state.

  On the other hand, when the conventional packaging box is in a suspended display state, first, the two auxiliary lid plates are bent inward by 90 ° at the base and the two auxiliary lid plates are used to open the opening of the box body. Cover the left and right sides. Next, the lid is kept upright without being bent, and the two locking pieces and the protruding piece are bent 90 ° inward at the base, and the lid plate is bent 90 ° inward at the base. However, the two locking pieces are inserted into the left side inner side and the right side inner side of the rear part of the opening part of the box body and locked, and the projecting piece is placed along the outer side of the rear center part of the opening part of the box body, and The standing hanging piece is inserted into the hanging piece insertion slit so as to protrude to the outside of the lid plate, and covers the opening of the box body including the two auxiliary lid plates folded by the folded lid plate. In this state, since the hanging piece is inserted through the hanging piece insertion slit and protrudes to the outside of the lid plate, the packaging box is in a hanging display state.

  However, in the above-described conventional packaging box, when the non-hanging display state is set, the lid plate covers the opening of the box body including the two auxiliary lid plates and the hanging pieces, so that the lid plate, the auxiliary lid plate, and There is no problem if the thickness of the packaging box material is relatively thin, about 0.5 to 0.7 mm, but the thickness is When the thickness is relatively thick, such as about 1.0 to 2.0 mm, for example, when a corrugated cardboard having a thickness of about 1.8 mm is used, the portion of the four-layer structure becomes too thick, and the auxiliary lid plate and Even if the opening of the box body including the two-layered suspended piece cannot be covered as expected, the four-layered structure is raised and not good-looking. . In addition, when it is in a non-hanging display state, the hanging piece insertion slit provided between the cover plate and the projecting piece can be seen as it is, so it does not look good, and the hanging piece insertion slit is a dead space. Therefore, there is a problem that characters and pictures cannot be applied to this part.

So, when this invention is in a non-suspended display state, even if the thickness of the packaging box material is relatively thick, it can be covered as expected without raising the opening of the box body with the lid plate, It is another object of the present invention to provide a method for assembling a packaging box that can prevent the appearance of a hanging piece insertion slit.

The present invention comprises at least a front plate, a rear plate, a bottom plate, a left side plate and a right side plate, and has a bottomed rectangular tube-shaped box body having an opening on the upper side, and a bend line on the upper side of the front plate. A first suspension piece having a first suspension hole, and a second suspension segment having a second suspension hole provided at a distal end side of the first suspension piece via a folding line. A suspension piece, a first protrusion provided on the tip side of the second suspension piece, a lid plate provided on the upper side of the rear plate via a folding line, and a tip portion of the lid plate The first and second portions are provided including a part of the cover plate between two cut lines provided in parallel to each other at the tip, and two cut lines are provided on the left side and the right side of the cut line. a second protrusion having a second fold line, a method of assembling a packaging box comprising a non-suspended exhibition When the second suspension piece is bent, the second suspension piece including the first protruding piece is inserted into the opening of the box body while the first suspension piece is bent. The second hanging piece covers the opening of the box body with the first hanging piece, and then the second projecting piece is folded inward along the first folding line, and the lid plate is folded while being folded. The original tip of the projecting piece is fitted into the first hanging hole of the first hanging piece, the opening of the box body is covered with the lid plate, and in this state, the non-hanging display state is set. When the display state is lowered, the cover plate is bent, the cover plate covers the opening of the box body, and the second projecting piece is bent outwardly by the second fold line. Along the hanging piece, the slit is cut by the cut line of the second projecting piece in this state. Formation, and then while bending the second hanging piece, insert the first projecting piece in the slit, a packing box assembling method characterized by a hanging display state in this state.

  According to the present invention, when the non-hanging display state is set, the lid plate, the bent second projecting piece, and the first hanging piece are laminated to form a three-layer structure. In comparison, the three-layer structure can be thinned. As a result, even if the material of the packaging box is relatively thick, the cover plate covers the box body as expected without rising. In addition, since the cut line of the second projecting piece is only visible in the non-suspended display state, a conventional hanging piece insertion slit can be prevented from appearing in the appearance.

The top view which expand | deploys and shows the packaging box as one Embodiment of this invention. The enlarged plan view of the part of the protrusion piece 49 of FIG. The perspective view seen from the front shown in order to demonstrate the original process in the case of assembling the packaging box of a non-hanging display state from what is shown in FIG. The perspective view seen from before showing in order to demonstrate the process following FIG. The perspective view seen from the front shown in order to demonstrate the process following FIG. The perspective view seen from the front shown in order to demonstrate the process following FIG. The perspective view seen from the back shown in order to demonstrate the process following FIG. 3 in the case of assembling the packaging box of a suspended display state from what is shown in FIG. The perspective view seen from the back shown in order to demonstrate the process following FIG. The perspective view seen from the back shown in order to demonstrate the process following FIG.

  FIG. 1 is a plan view showing an expanded packaging box as an embodiment of the present invention. The unfolded packaging box is, for example, a cardboard having a thickness of 1.8 mm, and a rectangular front plate 1 and a strip-shaped left side plate provided on the left side of the front plate 1 via a folding line 2. 3 and a strip-shaped right side plate 5 provided on the right side of the front plate 1 via a fold line 4. At the center of the front plate 1 in the vertical direction, the center of the right side of the left side plate 3 and the center of the left side of the right side plate 5, there are provided decorative windows 6 with four corners having a convex R shape. An elongated trapezoidal glue margin 8 is provided on the left side of the left side plate 3 via a folding line 7.

  A strip-shaped first hanging piece 12 is provided on the upper side of the front plate 1 via a folding line 11. A first hanging hole 13 is provided at the center of the first hanging piece 12. A strip-shaped second hanging piece 15 is provided on the front end side of the first hanging piece 12 via a folding line 14. In the center of the second suspension piece 15, a second suspension hole 16 that is symmetrical with the first suspension hole 13 is provided. Three square-shaped projecting pieces 17 are provided at the front end side of the second hanging piece 15 at intervals. In this case, the protrusions 17 are not provided on the left side and the right side of the tip side of the second suspension piece 15, and the left side and the right side of the tip side serve as a pressing surface 18.

  A strip-shaped bottom plate 22 is provided on the lower side of the front plate 1 via a folding line 21. A strip-shaped insertion piece 25 is provided on a portion excluding the left side and the right side of the tip side of the bottom plate 22 via a fold line 23 and a cut line 24 provided on the left side and the right side of the fold line 23. A slit 26 is provided at the center of the base end of the insertion piece 25. A semi-circular nail insertion hole 27 is provided continuously at the center of the slit 26 at the center of the tip of the bottom plate 22.

  A substantially rectangular left auxiliary bottom plate 32 is provided on the lower side of the left plate 3 via a fold line 31. A substantially rectangular right auxiliary bottom plate 34 is provided on the lower side of the right plate 5 via a folding line 33.

  A square rear plate 42 is provided on the right side of the right side plate 5 via a folding line 41. A strip-shaped lid plate 44 is provided on the upper side of the rear plate 42 via a folding line 43. A trapezoidal locking piece 46 is provided on the left side and the right side of the lid plate 44 via a folding line 45. Arc-shaped protruding pieces 47 are provided on the left side and the right side of the front end side of the lid plate 44.

  At the center of the front end of the lid plate 44, two cut lines 48 that substantially extend in a direction orthogonal to the front end side of the lid plate 44 are provided substantially parallel to each other. A projecting piece 49 is formed by a part of the cover plate 44 between the two cut lines 48 and a rectangular part protruding upward from a part of the cover plate 44. That is, a protruding piece 49 including a part of the cover plate 44 between the two cut lines 48 is provided at the center of the front end of the cover plate 44.

  Here, FIG. 2 shows an enlarged plan view of the projecting piece 49 of FIG. A cut line 50 is provided at the center of the protrusion 49 in the vertical direction. The left and right sides of the cut line 50 are two first and second fold lines 51 and 52, respectively. In this case, the first folding line 51 is provided slightly below the extended line on the upper side of the lid plate 44. The second folding line 52 is provided slightly above the extended line on the upper side of the lid plate 44. The cut line 50 includes a straight portion 50a provided on an extension line of the first fold line 51, and an arc portion 50b provided extending from the left end and the right end of the straight portion 50a to the second fold line 52. ing.

  Returning to FIG. 1 and continuing the description, two cut lines 61 extending in a direction orthogonal to the lower side of the rear plate 42 are provided in parallel to each other at the lower central portion of the rear plate 42. A locking piece 62 is formed by a part of the rear plate 42 between the two cut lines 61 and a rectangular portion protruding downward from a part of the rear plate 42. A proximal end side of the locking piece 62 is a fold line 63.

  A cut line 64 is provided at the center in the vertical direction of the locking piece 62. The left and right sides of the cut line 64 are bend lines 65. In this case, the fold line 65 is provided on an extension line of the lower side of the rear plate 42. The cut line 64 includes a straight line portion provided slightly below the extension line of the fold line 65 and a straight line portion provided extending from the left and right ends of the straight line portion to slightly above the fold line 65. Yes. The cut line 64 is for the user to hook the nail when the finally assembled packaging box is opened. Here, the nail insertion hole 27 is for making it easy for the user to hook the nail on the cut line 64.

  Next, the case where the packaging box of the non-hanging display state is assembled from what is shown in FIG. 1 will be described. First, the left side plate 3 is bent 90 ° inward by the fold line 2, the glue margin 8 is bent 90 ° inward by the fold line 7, the right side plate 5 is bent 90 ° inward by the fold line 4, and the rear plate 42 is bent. At 41, bend 90 ° inward. Next, the glue margin 8 is glued to the inner surface of the rear plate 42 on the right side in FIG.

  Next, the two auxiliary bottom plates 32 and 34 are bent 90 ° inward along the folding lines 31 and 33. Next, the insertion piece 25 is bent 90 ° inward along the bending line 23. Next, the insertion piece 25 is inserted into the lower inside of the rear plate 42 while the bottom plate 22 is bent 90 ° inward along the folding line 21. Next, the locking piece 62 is appropriately folded outward at the folding line 63 (this facilitates the next operation), and then the locking piece 62 is folded 90 ° inside by the folding line 65 while the locking piece 62 is being folded. The front end side of the folding line 65 of 62 is inserted into the slit 26, and the locking piece 62 that is appropriately folded outward by the folding line 63 is returned to the original state that cannot be folded by the folding line 63.

  In this state, as shown in the perspective view seen from the front of FIG. 3, the bottomed rectangular tube-shaped box body 71 including the front plate 1, the left side plate 3, the right side plate 5, the rear plate 42 and the bottom plate 22 is assembled. The upper side of the box body 71 is opened to form an opening 72. Further, in this state, with reference to FIG. 1, the bottom plate 22 is bent 90 ° inward at the folding line 21 because the distal end side of the locking piece 62 is inserted into the slit 26 with respect to the folding line 65. Locked in the locked state.

  Next, returning to FIG. 3 and continuing the description, a product (not shown) is inserted into the box body 71 from the opening 72 of the box body 71. In this case, the decorative window 6 is opened, but before inserting the product into the box body 71, a transparent hard plastic sheet having a concave cross section or a transparent flexible plastic sheet is inserted from the opening 72 of the box body 71 into the box body. The decorative window 6 may be covered with the inserted sheet.

  Next, the second hanging piece 15 is bent 90 ° inward along the folding line 14. Next, while appropriately folding the first hanging piece 12 outward along the folding line 11 (this facilitates the next operation), the second hanging piece 15 including the three projecting pieces 17 is moved backward. The first hanging piece 12 inserted into the upper part of the plate 42 and appropriately bent outward at the folding line 11 is returned to the original unfolded state, and further bent 90 ° inside by the folding line 11. In this state, as shown in the perspective view seen from the front of FIG. 4, the opening 72 of the box body 71 is covered with the first hanging piece 12.

  Next, as shown in the perspective view seen from the front of FIG. 5, the two locking pieces 46 are bent 90 ° inward along the folding line 45. Next, the projecting piece 49 is bent inward by about 180 ° inward along the first fold line 51. Next, while the lid plate 44 is bent 90 ° inward at the fold line 43, the two locking pieces 46 are inserted and locked into the upper inner side of the left side plate 3 and the upper inner side of the right side plate 5, and the first The original tip of the protruding piece 49 bent inward by the bending line 51 is fitted into the first hanging hole 13 of the first hanging piece 12. In this state, as shown in the perspective view seen from the front of FIG. 6, the opening 72 of the box body 71 is finally covered with the cover plate 44, thereby bringing the packaging box into a non-suspended display state.

  In this non-suspended display state, the lid plate 44 including the base end portion of the projecting piece 49, the distal end portion of the projecting piece 49, and the first hanging piece 12 are laminated to form a three-layer structure. Compared with the case where it becomes, the part used as 3 layer structure can be made thin. As a result, even if the thickness of the packaging box material is relatively thick, such as about 1.0 to 2.0 mm, for example, even if a cardboard having a thickness of about 1.8 mm is used, the lid plate 44 opens the box body 71. The part 72 can be covered as expected without being raised.

  Further, in this non-hanging display state, when viewed from above, only two cut lines 48 and one cut line 50 can be seen, so a conventional hanging piece insertion slit appears on the appearance. Therefore, the appearance can be improved as compared with the case where the conventional slit for inserting the hanging piece is visible. Further, since the cut lines 48 and 50 are literally cut lines, there is no dead space. Therefore, characters, pictures, and the like can be applied to these portions.

  Here, with reference to FIG. 1, the length in the left-right direction of the tip of the projecting piece 49 is substantially the same as the length in the left-right direction of the first hanging hole 13. Therefore, as described above, in the state shown in FIG. 5, when the original tip of the projecting piece 49 bent inward by the first fold line 51 is fitted into the first hanging hole 13, the projecting piece The original front end portion of 49 is fitted so that the long side portion of the first hanging hole 13 is deformed upward and pushed in. For this reason, in this state, the original tip end portion of the projecting piece 49 is unlikely to come out of the first hanging hole 13, and the lid plate 44 including the projecting piece 49 can be more firmly locked.

  Further, as shown in FIG. 6, when the projecting piece 49 is bent along the first fold line 51, the bent portion is positioned inside the front end side of the lid plate 44, and thus the first fold line The original tip of the protruding piece 49 bent inward at 51 can be easily inserted into the first hanging hole 13 (see FIG. 5).

  Next, the case where the packaging box of the suspended display state is assembled from what is shown in FIG. In this case, as shown in FIG. 3, the same operation is performed until the bottomed rectangular tube-shaped box body 71 is assembled. Next, a description will be given with reference to a rear perspective view of FIG. 7. The two locking pieces 46 are bent 90 ° inward along a folding line 45. Next, the protruding piece 49 is appropriately bent outward along the second fold line 52, and a crease is provided.

  Next, the two locking pieces 46 are inserted into the upper inner side of the left side plate 3 and the upper inner side of the right side plate 5 to be locked while the lid plate 44 is bent 90 ° inward along the folding line 43. In this case, in a state where the lid plate 44 is bent to the inside by the fold line 43 to some extent, the tip of the protruding piece 49 with the outward bending butt against the first hanging piece 12 in the standing state, The protruding piece 49 is appropriately bent outward.

  In a state in which the cover plate 44 is completely bent 90 ° inward by the fold line 43, the projecting piece 49 is bent 90 ° outward by the second fold line 52 and is in a standing state. It will be in the state which follows the hanging piece 12. In this state, the projecting piece 49 is completely bent 90 ° outward along the second fold line 52, whereby a slit 50 c (see FIG. 8) is formed by the cut line 50. That is, as shown in FIG. 2, since the cut line 50 has a shape having arc portions 50b at both ends of the straight portion 50a, when the protruding piece 49 is completely bent 90 ° outward by the second fold line 52, A slit 50 c is formed by the cut line 50.

  Next, a description will be given with reference to a perspective view seen from the rear of FIG. 8 in a state in which the cover plate 44 is appropriately pushed into the opening 72 of the box body 71 (this facilitates the next operation). The first hanging piece 12 is appropriately folded outward at the folding line 11 (this also facilitates the next operation), and the second hanging piece 15 is appropriately folded inside by the folding line 14. On the other hand, the two protruding pieces 17 on the outer sides of the three protruding pieces 17 are inserted between the protruding pieces 49 and the two protruding pieces 47 into the upper inner side of the front plate 1 and the remaining one protruding piece The piece 17 is inserted into the slit 50c.

  Here, with reference to FIG. 1, arc-shaped projecting pieces 47 are provided on the left side and the right side of the front end side of the cover plate 44. The front end side of the lid plate 44 in between is recessed from the projecting piece 47. As a result, as shown in FIG. 8, by inserting the two projecting pieces 17 on both outer sides through the space between the projecting piece 49 and the two projecting pieces 47 (the above-described recessed portion), It is possible to facilitate insertion of the two protruding pieces 17 on both outer sides into the upper inner side of the front plate 1.

  Next, the pushing to the cover plate 44 is released, and the first hanging piece 12 that is appropriately bent outward at the folding line 11 is returned to the original unfolded state, and the second hanging piece 15 is When the folding line 14 is completely bent inward by 180 °, the opening 72 of the box body 71 is covered with the lid plate 44 as expected as shown in the perspective view seen from the rear of FIG. The second suspension pieces 12 and 15 are overlapped with each other to be in a standing state, and the first and second suspension holes 13 and 16 are overlapped with each other to form one suspension hole, whereby the packaging is performed. The box is in a suspended display state.

  In this hanging display state, the two pressing surfaces 18 of the second hanging piece 15 press the two projecting pieces 47 of the cover plate 44 from above, so that the two hanging pieces 15 of the second hanging piece 15 are pressed. The cover plate 44 including the two projecting pieces 47 is locked in a closed state by the pressing surface 18.

  Next, the case of changing from the non-suspended display state shown in FIG. 6 to the suspended display state shown in FIG. 9 will be described. In this case, the state shown in FIG. 3 is sequentially obtained through the state shown in FIG. 5 and the state shown in FIG. By performing the same operation as the above assembly operation, the state shown in FIG. 7 and the state shown in FIG.

  Next, a case where the suspended display state shown in FIG. 9 is changed to the non-suspended display state shown in FIG. 6 will be described. In this case, by performing an operation opposite to the above assembly work from the suspended display state shown in FIG. 9, the state shown in FIG. 8 and the state shown in FIG. By performing the same work as the assembly work, the state shown in FIG. 4 and the state shown in FIG.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, The invention described in the claim and its equal range are included.

The invention described in the scope of the claims of the present application will be additionally described below.
(Appendix)
The invention according to claim 1 comprises at least a front plate, a rear plate, a bottom plate, a left side plate and a right side plate, and has a bottomed rectangular tube-shaped box body having an opening on the upper side, and an upper side of the front plate. A first suspension piece having a first suspension hole, and a second suspension hole provided at a distal end side of the first suspension piece via a folding line. A first hanging piece provided on the front end side of the second hanging piece, a lid plate provided on the upper side of the rear plate via a folding line, Provided at the tip of the cover plate including a part of the cover plate between two cut lines provided parallel to each other at the tip, two each on the left and right sides of the cut line A second projecting piece having first and second fold lines, and a non-hanging display state. While bending the second suspension piece and bending the first suspension piece, the second suspension piece including the first projecting piece is inserted into the opening of the box body, and the first suspension piece is inserted. Covering the opening of the box body with a hanging piece, then folding the second projecting piece inward along the first fold line and folding the cover plate while folding the cover plate, The front end is fitted into the first hanging hole of the first hanging piece, the opening of the box body is finally covered with the lid plate, and in this state, the non-hanging display state is set. When the state is set, the cover plate is bent, the cover plate covers the opening of the box body, and the second projecting piece is bent outwardly by the second fold line so as to form the first suspension. Along the lowering piece, a slit is formed by the cut line of the second projecting piece in this state And then while bending the second hanging piece, insert the first projecting piece in the slit, a packaging box which is characterized in that the lower display state suspended in this state.

  According to a second aspect of the present invention, in the first aspect of the present invention, the original tip end portion of the second projecting piece bent inward by the first fold line is the first hanging piece. In a state of being fitted in the first suspension hole, the portion of the second projecting piece that is bent inward by the first fold line is located on the inner side of the front end side of the lid plate. This is a characteristic packaging box.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the first projecting piece is provided at three intervals on the tip side of the second hanging piece, and The first projecting piece is not provided on the left side and the right side of the tip side of the second hanging piece, and the left side and the right side of the tip side are holding surfaces, and the lid plate A third projecting piece is provided on the left side and right side of the front end side of each of the first projecting pieces, and the two first projecting pieces on the outer sides of the three first projecting pieces are connected to the second projecting piece and the second projecting piece. Inserting into the opening of the box body through the third projecting piece, and inserting the remaining one central first projecting piece into the slit, in this state of the second hanging piece In the packaging box, two pressing surfaces press the two third projecting pieces of the lid plate.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a locking piece is provided on a left side and a right side of the lid plate via a fold line, and the lid plate is bent. When the cover plate covers the opening of the box body, the two locking pieces are bent and inserted into the opening of the box body to be locked.

DESCRIPTION OF SYMBOLS 1 Front plate 3 Left side plate 5 Right side plate 8 Adhesive margin 12 1st suspension piece 15 2nd suspension piece 13 1st suspension hole 16 2nd suspension hole 17 Protrusion piece 18 Pressing surface 22 Bottom plate 42 Rear Plate 44 Cover plate 46 Locking piece 47 Projection piece 49 Projection piece 50 Cut line 50c Slit 71 Box body 72 Opening

Claims (4)

A box body having a bottomed rectangular tube shape having an opening on the upper side, including a front plate, a rear plate, a bottom plate, a left side plate and a right side plate;
A first hanging piece provided on the upper side of the front plate via a fold line and having a first hanging hole;
A second hanging piece provided on the front end side of the first hanging piece via a fold line and having a second hanging hole;
A first projecting piece provided on a tip side of the second hanging piece;
A lid plate provided on the upper side of the rear plate via a folding line;
A method of assembling a packaging box, comprising: a second projecting piece provided at a distal end portion of the lid plate so as to include a part of the lid plate between two cut lines provided parallel to each other at the distal end portion. There,
The second projecting piece of the packaging box includes another cut line provided in a direction intersecting the two cut lines, and the extension of the two cut lines on the left and right sides of the other cut lines. Two second folding lines provided near the tip side of the second projecting piece in the portion where the other cut line is provided in the direction, and the portion near the tip side of the part in the extending direction And two first fold lines provided on the
When the non-suspended display state is set, the second suspended piece including the first projecting piece is folded while the second suspended piece is bent and the first suspended piece is folded. Inserted into the opening, covered the opening of the box body with the first hanging piece, then bent the second projecting piece inward along the first fold line and bent the lid plate The second projecting piece is fitted into the first hanging hole of the first hanging piece, the opening of the box body is covered with the lid plate, and in this state, the non-hanging display state is set.
In the suspended display state, the lid plate is folded, the opening of the box body is covered with the lid plate, and the second projecting piece is folded outward along the second folding line. In this state, a slit is formed by the another cut line of the second projecting piece, and then the second projecting piece is bent while the second projecting piece is bent. A packaging box assembling method, wherein the packaging box is inserted into a slit and suspended in this state. In the invention according to claim 1, the second projecting piece of the packaging box has the two first fold lines extending from the front end side of the lid plate in the extending direction of the two cut lines. A method for assembling a packaging box, wherein the packaging box is also located inside.   3. The invention according to claim 1, wherein the first projecting piece is provided on the tip side of the second suspension piece at three intervals, and the tip side of the second suspension piece. The first projecting piece is not provided on the left side and the right side, and the left side and the right side of the tip side are holding surfaces, and the left side and the right side of the tip side of the lid plate A third projecting piece is provided, and two of the three first projecting pieces are arranged between the first projecting piece and the second projecting piece. Is inserted into the opening of the box main body, and the remaining one central first protrusion is inserted into the slit. In this state, the two pressing surfaces of the second hanging piece are formed on the lid plate. A method of assembling a packaging box, wherein two third projecting pieces are pressed.   The invention according to any one of claims 1 to 3, wherein a locking piece is provided on a left side and a right side of the lid plate via a folding line, the lid plate is bent, and the lid plate opens the box body. A packaging box assembling method, wherein when the cover is covered, the two locking pieces are bent and inserted into the opening of the box body to be locked.

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