JP6515883B2 - Blank sheet for packaging box and packaging box - Google Patents

Description

  The present invention relates to a blank sheet for a packaging box which can be assembled to any of a rectangular parallelepiped packaging box and a triangular prism packaging box according to the number and shape of contents, and between a rectangular parallelepiped and a triangular prism It relates to a deformable packaging box.

  Conventionally, packaging boxes made of cardboard, cardboard, etc. are widely used as packaging boxes for storing, transporting and storing a plurality of contents. A packaging box of this type is assembled by bending one blank sheet along a predetermined fold line, and for example, it has a rectangular cross-sectional view as shown in Patent Document 1 in addition to a rectangular parallelepiped packaging box having a rectangular cross-sectional view. A triangular prismatic packaging box is commonly used.

Japanese Utility Model No. 3-50014

  Here, the rectangular parallelepiped packaging box is good in the storage property of the contents and the stability at the time of storage and transportation of the packaging box. However, as shown in FIG. 13, in the case of a rectangular parallelepiped packaging box, when the number of contents P stored relative to the internal volume is small, a dead space S exists inside, and the packaging box is stored accordingly -Since the space is increased when transporting, storage efficiency and transport efficiency deteriorate. Therefore, when the number of contents P to be stored is small, as shown in FIG. 14, the dead space S can be reduced by using the triangular pillar type packaging box, and the space for storing and transporting the packaging box can be reduced. It is possible to eliminate the waste of However, in this case, it is necessary to prepare two types of blank sheets, a blank sheet for a rectangular box-shaped packaging box and a blank sheet for a triangular column-shaped packaging box, so the procurement cost of the packaging material and the labor of management There is a problem of this.

  The present invention has been made focusing on the above-mentioned problems, and according to the number and shape of contents, a blank for a packaging box which can be assembled in any of a rectangular parallelepiped packaging box and a triangular pillar packaging box. It is an object of the present invention to provide a sheet and a packaging box that can be deformed between a rectangular solid and a triangular prism.

  The above object of the present invention is a blank sheet for a packaging box capable of assembling both a rectangular parallelepiped-shaped and a triangular column-shaped packaging box, which comprises six sides in the rectangular parallelepiped packaging box, a bottom portion and the bottom portion A left end face and a right end face, a pair of front side face and a rear side face, and a front end edge of the front side face, the left end face and the right end face being foldably provided around the bottom face A top surface portion is provided, and a first fold line diagonally extending from a rear end corner of the tip end edge is provided on the left end surface portion and the right end surface portion, and the top surface portion is provided with the top surface portion And a second fold line is provided to divide the second portion into a first portion connected to the front side surface portion and a second portion connected to the first portion, the left end surface portion and the right end surface portion Fold in a triangle at the first fold A blank for a packaging box having a pair of end faces in a triangular prism type packaging box, wherein the bottom surface portion, the rear side surface portion, the front side surface portion and the first portion form a circumferential surface in a triangular prism type packaging box Achieved by the sheet.

  In the blank sheet for a packaging box of the above configuration, first flaps are provided foldably at leading edges of the left end face and the right end face, respectively, and in the triangular prism type packaging box, the first flap is the rear side face It is preferable that the second part can be inserted between the part and the rear side part opposite to the part.

  Further, in the blank sheet for the packaging box of the above configuration, second flaps are provided so as to be foldable at the front end edges of the left end surface and the right end face, respectively, and in the triangular prism type packaging box, the second flap is Preferably, they are disposed opposite each other on the bottom portion. In this case, it is more preferable that the length of the second flaps be set such that the tip end portions abut each other when the second flaps are disposed to face each other on the bottom surface portion.

  Further, in the blank sheet for the packaging box of the above configuration, the insertion portion is provided on the top surface portion so as to be foldable at the front end edge, and in the triangular prism type packaging box, the insertion portion is flat with the second portion It is preferable to be inserted between the said 1st flap and the said back side part in a state.

  Further, the object of the present invention is to provide a bottom surface portion, a pair of left and right end surface portions and a right end surface portion, a front and rear pair of front side surface portions and a rear side surface portion, and a top surface portion foldably provided on the front side surface portion. It is a rectangular parallelepiped packaging box provided at least, and the first fold line extending diagonally from the rear corner of the upper end edge is provided in the left end face and the right end face, and the top face is A second fold line is provided to divide the top surface portion into a first portion connected to the front side surface portion and a second portion connected to the first portion, and the left end surface portion and the right end surface portion are The first fold folds into a triangular shape, and the first portion follows the inclined side of the left end surface portion and the right end surface portion, which are in a flat state with the front side surface portion and in a triangular shape, and the second The part is folded at the second fold By along the serial after side portion is achieved by the packaging box can be deformed into a triangular prism shape.

  In the packaging box of the above configuration, first flaps bent inward by 90 degrees are respectively provided at upper end edges of the left end surface portion and the right end surface portion, and the first flap includes the left end surface portion and the right end surface portion The second portion can be inserted between the left end surface portion and the right end surface portion in the opposite direction in a state of being folded into a triangular shape by the first fold and the rear side surface portion. Is preferred.

  In the packaging box of the above configuration, second flaps bent inward by 90 degrees are respectively provided at the front end edges of the left end surface portion and the right end surface portion, and the second flap includes the left end surface portion and the right end In a state in which the surface portion is folded at the first fold into a triangular shape, it is preferable that the left end surface portion and the right end surface portion can be bent in opposite directions to be disposed opposite to each other on the bottom surface portion . In this case, it is more preferable that the length of the second flaps be set such that the tip end portions abut each other when the second flaps are disposed to face each other on the bottom surface portion.

  Further, in the packaging box of the above configuration, the insertion portion is provided in the top surface portion so as to be foldable, and the insertion portion is formed in a triangular shape by folding the left end surface portion and the right end surface portion with the first fold. In this state, it is preferable that the second portion and the second portion be flat so as to be insertable between the first flap and the rear side surface portion.

  According to the present invention, since it is possible to assemble both a rectangular parallelepiped packaging box and a triangular pillar packaging box by only one kind of blank sheet, as in the prior art, it is for a rectangular parallelepiped packaging box and a triangular prism packaging box. There is no need to procure or store two types of blank sheets for Therefore, the procurement cost of packaging material and the effort of management can be reduced. In addition, because it can be assembled into a rectangular parallelepiped packaging box or a triangular pillar packaging box according to the number and shape of contents, when the number of contents to be stored is small, using a triangular prism packaging box Wasteful dead space can be reduced, and space saving can be achieved during storage and transport of the packaging box. Therefore, the efficiency at the time of storage or transport of the packaging box can be improved.

It is a blank sheet top view for packing boxes concerning one embodiment of the present invention. It is a perspective view which shows the procedure which assembles a rectangular parallelepiped or triangular prism type packaging box by the blank sheet | seat of FIG. It is a perspective view which shows the procedure which assembles a rectangular parallelepiped or triangular prism type packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view which shows the procedure which assembles a rectangular parallelepiped or triangular prism type packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view which shows the procedure which assembles a rectangular parallelepiped packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view which shows the procedure which assembles a rectangular parallelepiped packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view of a rectangular parallelepiped packaging box. FIG. 8 is an enlarged cross-sectional view taken along line II of FIG. 7; It is a perspective view which shows the procedure which assembles a triangular-pillar-shaped packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view which shows the procedure which assembles the triangular prism type packaging box by the blank sheet | seat of FIG. 1 following FIG. It is a perspective view of a triangular prism type packaging box. II-II enlarged sectional view of FIG. 7 It is a schematic sectional drawing of the state which accommodated the content in the rectangular parallelepiped packaging box. It is a schematic sectional drawing of the state which accommodated the content in the packaging box of triangular-prism type | mold.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. FIG. 1 shows a blank sheet 1 for a packaging box according to an embodiment of the present invention. The blank sheet 1 according to the present invention can be assembled to either a triangular prism type packaging box or a rectangular parallelepiped packaging box according to the number and shape of contents, and FIGS. 7 and 8 show the blank sheet 1. FIGS. 11 and 12 show the external appearance and internal structure of the rectangular prism-shaped packaging box B assembled by the blank sheet 1, respectively.

  The blank sheet 10 is made of, for example, various known paper materials such as cardboard and corrugated paper. The blank sheet 10 has a rectangular bottom surface 2 and a pair of left and right substantially square end surfaces 3 and 4 and a pair of front and rear rectangular side components 5 and 6 provided foldably about the bottom surface 2; And a rectangular top surface 7 at least. One end face portion 3, the bottom face portion 2 and the other end face portion 4 are continuously provided in this order in the left-right direction, and the top face portion 7, one side face portion 5, the bottom face portion 2 and the other side face portion 6 It is connected in order. The top surface portion 7, one side surface portion 5, the bottom surface portion 2 and the other side surface portion 6 are formed to be larger in the left-right direction than in the front-rear direction.

  In the present specification, the XY direction (long side direction of the bottom 2) in FIG. 1 is the left and right direction, and the VW direction (short side of the bottom 2) is the front and back direction. The end face 4 is referred to as a left end face 3 and a right end face 4 respectively, and the front side face 5 and the rear side face 6 are referred to as a front side face 5 and a rear side face 6, respectively.

  The left end surface portion 3, the right end surface portion 4, the front side surface portion 5 and the rear side surface portion 6 are provided on the periphery of the bottom surface portion 2 via fold lines L1 to L4 so as to surround the bottom surface portion 2. Further, the top surface portion 7 is provided so as to be foldable to the front end edge (upper end edge when assembling the packaging box A) of the front side surface portion 5 via a fold line L5. The bottom surface portion 2, the left end surface portion 3, the right end surface portion 4, the front side surface portion 5, the rear side surface portion 6, and the top surface portion 7 constitute six sides of the rectangular parallelepiped packaging box A.

  In the left end face portion 3 and the right end face portion 4, the substantially rectangular first flap 8 can be bent through the fold lines L6 and L7 at the tip end opposite to the bottom face 2 (upper end edge when assembling the packaging box A) It is provided. In the left end surface portion 3 and the right end surface portion 4, rectangular second flaps 9 are provided foldably at the end edge (front end edge) on the front side surface 5 side through fold lines L8 and L9, A substantially rectangular third flap 10 is provided foldably at the end edge (rear end edge) on the rear side surface 6 side via fold lines L10 and L11. Furthermore, in the top surface portion 7, a substantially rectangular insertion portion 11 is provided at the front end edge so as to be foldable via a fold L12. Both corners of the first flap 8 and the insertion portion 11 are chamfered and rounded.

  A pair of left and right long slot-like insertion holes 12 are formed in the bottom surface portion 2 at the boundary with the rear side surface portion 6 at predetermined intervals. The insertion hole 12 is formed at a position corresponding to the pair of left and right locking pieces 13 provided on the rear end edge of the rear side surface 6 opposite to the bottom surface 2 and the locking piece 13 is inserted It is formed in the possible size.

  In the left end face portion 3 and the right end face portion 4, fold lines extending diagonally from corners of the rear side face portion 6 side (rear side) of the tip end edges of the end face portions 3 and 4 ("first fold line in claims Corresponding to L.) L13 is provided. In the present invention, the "corner" does not necessarily mean only the rearmost corner of the tip end edge of the end face portions 3 and 4, but also includes the vicinity of the corner. The left end face 3 and the right end face 4 can be formed into a triangular shape by being folded at the first fold L13.

  In the present embodiment, the rear side surface 6 includes an outer surface 60 connected to the bottom surface 2, an upper surface 62 connected to the outer surface 60, and an inner surface 61 connected to the upper surface 62. It is configured. The outer surface portion 60, the upper surface portion 62, and the inner surface portion 61 are continuously arranged in the front-rear direction via the fold lines L14 and L15. At the rear end edge of the inner surface portion 61, the pair of left and right locking pieces 13 described above are formed at predetermined intervals.

  The top surface portion 7 is provided with a fold line L16 (corresponding to a “second fold line” in the claims) extending in the left-right direction. The top surface portion 7 is divided into a first portion 70 connected to the front side surface portion 5 and a second portion 71 connected to the first portion 70 by a fold line L16. The front side surface 5 and the top surface 7 arranged continuously in the front-rear direction can be bent at a fold L5 at the boundary between the front side surface 5 and the first portion 70, while the first portion 70 and the second It is also possible to bend at a fold L16 at the boundary with the portion 71. The position of the fold L16 is set such that the length d1 from the boundary between the bottom surface 2 and the front side surface 5 is substantially the same as or slightly larger than the length d2 of the first fold L13.

  Next, a procedure for assembling the rectangular parallelepiped packaging box A and the triangular prism packaging box B by using the blank sheet 1 having the above configuration will be described.

  First, in order to assemble the rectangular parallelepiped packaging box A, first, as shown in FIG. 2, after raising both end surface portions 3 and 4 of the blank sheet 1 together with the second flap 9 and the third flap 10, As shown in FIG. 3, the third flap 10 is bent inward by 90 degrees. Next, after raising the outer surface portion 60, the upper surface portion 62 and the inner surface portion 61 constituting the rear side surface portion 6 vertically on the outer side of the third flap 10, the upper surface portion 62 and the inner surface portion 61 are creased L14 and L15, respectively. Then, the upper surface portion 62 is disposed on the third flap 10 by bending it inward by 90 degrees, and the inner surface portion 61 is suspended inside the third flap 10 so that the locking piece 13 is inserted into the insertion hole 12 of the bottom surface portion 2. Plug in As a result, as shown in FIG. 4, the rear side surface portion 6 of the two-layer structure of the outer surface portion 60 and the inner surface portion 61 is formed, and its shape is maintained. In addition, the third flap 10 is held by the outer surface portion 60 and the inner surface portion 61, whereby the state in which the both end surface portions 3 and 4 are erected is maintained.

  Next, as shown in FIG. 5, the first flap 8 is bent 90 degrees inward, and the second flap 9 is bent 90 degrees inward. The first flap 8 plays a role of supporting the top panel 7 when the packaging box A is assembled. In addition, the second flap 8 plays a role of supporting the front side portion 6 when the packaging box A is assembled.

  Thereafter, as shown in FIG. 6, the front side surface 5, the top surface 7 and the insertion portion 11 are bent along the fold line L3 to vertically raise the front side surface 5, and the top surface 7 and the insertion portion 11 is closed inward along the folds L5 and L12 by 90 degrees so that the top surface 7 closes the upper surface opening 14 of the box main body including the bottom 2, the both end surfaces 3, 4 and the both side surface 5, 6, The insertion portion 11 is inserted between the rear side surface portion 6 and the first flap 8. Thereby, as shown in FIG. 7, the rectangular parallelepiped packaging box A is assembled.

  In the rectangular parallelepiped packaging box A, as shown in FIGS. 7 and 8, the bottom surface 2, the left end surface 3, the right end surface 4, the front side surface 5, the rear side surface 6, and the top surface 7 constitute six sides. There is. The top surface plate 7 functioning as a lid is inserted between the first flap 8 and the rear side surface portion 6 at the upper end edges of the both end surface portions 3 and 4 to maintain the state in which the upper surface opening 14 is closed. Further, while the shape of the rear side surface portion 6 of the two-layer structure is maintained, the third flap 10 is held by the outer surface portion 60 and the inner surface portion 61 of the rear side surface portion 6 Thus, the packaging box A can be maintained in a strong shape without using a tape, an adhesive or the like.

  On the other hand, in order to assemble the triangular prism type packaging box B from the blank sheet 1, the steps from FIG. 2 to FIG. 4 described above are the same as in the case of assembling the rectangular parallelepiped packaging box A. Next, the first flap 8 and the second flap 9 are bent outward by 90 degrees respectively, and then the both end surface portions 3 and 4 are folded inward along the fold line L13 to form a triangular shape, as shown in FIG. Thus, the first flap 8 is made to face the rear side surface portion 6 and the second flap 9 is disposed on the bottom surface portion 2.

  Here, when the second flap 9 is disposed on the bottom portion 2 in a triangular shape by folding both end surface portions 3 and 4 at the fold L13, the tip portions of the two second flaps 9 arranged to face each other abut each other As such, the length d3 (shown in FIG. 1) is set. As a result, the second flap 9 functions as a brace, so that the both end surface portions 3 and 4 are prevented from naturally opening from the state of being folded in a triangular shape, and the shapes of the both end surface portions 3 and 4 are maintained.

  Thereafter, as shown in FIG. 10, by bending the front side surface portion 5, the top surface portion 7 and the insertion portion 11 along the fold lines L3 and L16, the first front side surface portion 5 and the top surface portion 7 are connected in a flat state. The portion 70 is placed along the inclined sides of both end surface portions 3 and 4 and the sloped opening 15 of the box main body consisting of the bottom surface portion 2, both end surface portions 3 and 4 and the back side surface 6 is closed by the front side surface 5 and the first portion 70, The second portion 71 and the insertion portion 11 of the top surface portion 7 connected in a flat state are inserted between the rear side surface portion 6 and the first flap 8. Thereby, the state where the sloped opening 15 of the box body is closed by the front side surface portion 5 and the first portion 70 is maintained, and as shown in FIG. 11, the triangular prism type packaging box B is assembled.

  In the triangular prism type packaging box B, as shown in FIGS. 11 and 12, the bottom surface portion 2, the front side surface portion 5, the back side surface portion 6, and the first portion 70 of the top surface portion 7 form a circumferential surface, The folded end surface portions 3 and 4 constitute an end surface. The front side surface portion 5 and the first portion 70 which function as lids are inserted between the first flap 8 and the rear side surface portion 6 to maintain the state in which the slope opening 15 is closed. Further, the shape of the rear side surface portion 6 of the two-layer structure is maintained, and the third flap 10 is held between the outer surface portion 60 and the inner surface portion 61 to maintain the state in which both end surface portions 3 and 4 are erected. The shape of the end faces 3 and 4 folded in a triangular shape is maintained by the two flaps 9, so that the packaging box B can be maintained in a strong shape without using a tape or an adhesive.

  As described above, according to the blank sheet 1 having the above-described configuration, since both the rectangular box-shaped packaging box A and the triangular column-shaped packaging box B can be assembled with only one type of blank sheet 1, as in the prior art, There is no need to procure or store two types of blank sheets for mold packaging boxes and triangular column packaging boxes, and an adhesive is used when assembling rectangular parallelepiped packaging box A and triangular column packaging box B. Since no tape or tape is required, it is possible to reduce the cost of procurement of packaging materials and the time and labor for operations and management.

  In addition, according to the number and shape of the contents, since it can be assembled in the rectangular parallelepiped packaging box A or the triangular pillar packaging box B, when the number of contents to be stored is small, using the triangular prism packaging box B And wasteful dead space in the box can be reduced, and space saving can be achieved when storing and transporting the packaging box. Therefore, the efficiency at the time of storage or transport of the packaging box can be improved.

  Further, not only can the shape of the rectangular parallelepiped packaging box A be maintained in a strong shape, but also for the triangular prism packaging box B, the third flap 10 can retain the shapes of both end faces 3 and 4 folded in a triangular shape. The front side 5 and the first portion 70, which function as lids, can keep the opening of the box closed, so that the shape can be maintained robustly.

  In addition, the transformation from the rectangular parallelepiped packaging box A to the triangular prism packaging box B is easy. Specifically, first, the top plate 7 of the packaging box A is opened. Next, since the fold L13 is provided in the both end surface parts 3 and 4 of the packaging box A so as to extend diagonally from the corner on the rear side surface part 6 side of the upper end edge, both ends along this fold L13 The faces 3 and 4 are folded to form a triangle. At this time, at the upper end edges of the both end surface portions 3 and 4 of the packaging box A, a first flap 8 bent inward 90 degrees with respect to the both end surface portions 3 and 4 is provided to face the top surface portion 6 Since the first flap 8 is bent 90 degrees in the opposite direction (outward) with respect to the both end surface portions 3 and 4, the first flap 8 is opposed to the rear side surface portion 6. Further, at the end edge on the front side surface part 5 side of the both end surface parts 3 and 4 of the packaging box A, the second bent inward to the both end surface parts 3 and 4 so as to face the front side surface part 5 Since the flaps 9 are provided, the second flaps 9 are disposed on the bottom portion 2 by bending them 90 degrees in the opposite direction (outward) with respect to the both end surface portions 3 and 4.

  Then, after making the first portion 70 of the top panel 7 flat by the front side surface portion 5 and the fold line L5, both end surface portions 3 are formed into a triangular shape by bending the first portion 70 and the front side surface portion 5 by the fold line L3, Follow the slope of 4. At the same time, the top surface 7 of the packaging box A is provided with a fold L16 extending between the two end surfaces 3 and 4 to divide the top surface 7 into the first portion 70 and the second portion 71. The second portion 71 is bent by L16, and the insertion portion 11 provided in the top surface portion 7 is made flat with the second portion 71 by the fold line L12, so that the first flap 8 and the rear side surface portion 6 together with the second portion 71. Plug in between. Thereby, the rectangular parallelepiped packaging box A can be transformed into a triangular prism packaging box B. In addition, it is also possible to deform the triangular pillar-shaped packaging box B into a rectangular parallelepiped packaging box A.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning of this invention.

  For example, in the above embodiment, when the second flaps 9 are disposed on the bottom surface 2 in a triangular shape by folding both end surface portions 3 and 4 at the fold L13, the tip portions of the two second flaps 9 disposed opposite to each other Although they are designed to abut each other, the tips do not necessarily have to abut.

  In addition, the first to third flaps 8 to 10 do not necessarily have to be provided. In this case, in the above embodiment, it is stated that the packaging box can be assembled without using an adhesive, tape or the like, so that the procurement cost of packaging material and the labor of operation and management can be reduced. The invention does not deny the use of an adhesive, a tape or the like, and may provide a glue margin or the like as needed, and assemble the packaging box using an adhesive, a tape or the like.

DESCRIPTION OF SYMBOLS 1 Blank sheet for packaging box 2 Bottom face part 3 Left end face part 4 Right end face part 5 Front side face part 6 Rear side face part 7 Top face part 8 First flap 9 Second flap 10 Third flap 11 Insertion part L13 Crease (1st crease )
L16 crease (second crease)

Claims (10)

A blank sheet for a packaging box capable of assembling both rectangular and triangular prismatic packaging boxes,
A bottom surface portion constituting six sides of a rectangular parallelepiped packaging box, a pair of left and right end surface portions and right end surface portions provided foldably around the bottom surface portion around the bottom surface portion, a pair of front and rear front side portions, At least a rear side surface portion and a top surface portion foldably provided at a front end edge of the front side surface portion,
Each of the left end surface and the right end surface is provided with a first fold line extending diagonally from a rear corner of the tip edge opposite to the bottom surface ,
The top surface portion is provided with a second fold that divides the top surface portion into a first portion connected to the front side surface portion and a second portion connected to the first portion. ,
The left end face portion and the right end face portion are folded in a triangular shape at the first fold to form a pair of end faces in a triangular prism type packaging box, the bottom face portion, the rear side surface portion, the front side surface portion and the first side surface portion A blank sheet for a packaging box which forms a circumferential surface in a triangular prism-shaped packaging box with one part. First flaps are provided foldably at leading end edges of the left end face and the right end face,
The blank sheet for a packaging box according to claim 1, wherein in the triangular prism type packaging box, the first flap is capable of inserting the second portion between the rear side surface and the rear side surface opposite to the rear side surface. . Second flaps are provided foldably at front end edges of the left end face and the right end face,
The blank sheet for a packaging box according to claim 1 or 2, wherein the second flaps are arranged opposite to each other on the bottom surface portion in a triangular prism packaging box.   The blank sheet for a packaging box according to claim 3, wherein the lengths of the second flaps are set such that the tip end portions abut each other when the second flaps are disposed to face each other on the bottom surface portion. In the top surface portion, an insertion portion is provided so as to be bendable at the front end edge,
The blank sheet for a packaging box according to claim 2, wherein in the triangular prism type packaging box, the insertion part is inserted between the first flap and the rear side part in a flat state with the second part. A rectangular parallelepiped packaging box comprising at least a bottom portion, a pair of left and right end surface portions, a right end surface portion, a pair of front and rear side surfaces and a rear side surface, and a top surface portion foldably provided on the front side surface. There,
Wherein the left end face and the right end surface, and the first fold extending diagonally disposed from the corner of the rear side of the opposite side of the upper edge and each of said bottom portion,
The top surface portion is provided with a second fold that divides the top surface portion into a first portion connected to the front side surface portion and a second portion connected to the first portion,
The left end surface portion and the right end surface portion are folded at the first fold to form a triangular shape, and the first portion is formed into a flat shape with the front side surface portion. A packaging box that can be deformed into a triangular prism shape by being along the inclined side and being folded at the second fold and along the rear side surface part by the second part. First flaps bent inward by 90 degrees are respectively provided at upper end edges of the left end surface portion and the right end surface portion,
The first flap is bent in the opposite direction with respect to the left end surface and the right end surface portion in a state in which the left end surface portion and the right end surface portion are folded at the first fold and formed into a triangular shape. 7. The packaging box according to claim 6, wherein the second part can be inserted between. At the front end edges of the left end surface portion and the right end surface portion, second flaps bent inward by 90 degrees are respectively provided.
The second flap is bent in the opposite direction with respect to the left end surface and the right end surface portion in a state where the left end surface portion and the right end surface portion are folded at the first fold and formed into a triangular shape. The packaging box according to claim 6 or 7, which can be disposed opposite to each other.   The packaging box according to claim 8, wherein the lengths of the second flaps are set such that the tip end portions abut each other when the second flaps are disposed to face each other on the bottom surface portion. In the top surface portion, an insertion portion is provided so as to be bendable,
The insertion portion is flat with the second portion in a state in which the left end surface portion and the right end surface portion are folded at the first fold into a triangular shape, and the first flap and the rear side surface The packaging box according to claim 7, which can be inserted between the part.