Packaging box

Abstract

Provided is a packaging box that is easy to produce and assemble and has excellent aesthetics. 【Solution means】 It comprises a body portion in the shape of a square tube and an end portion consisting of end plates continuously provided on four sides of the opening side of the body portion. A pair of opposing end plates are provided with adhesive pieces via inclined folding portions extending from near the corners of the body portion, and the packaging box closes the opening by adhering the adhesive pieces to other adjacent end plates. In the state of the primary assembled product, the body portion is folded flat, the end plates are folded flat overlapping the body portion, and the adhesive pieces are adhered to the adjacent end plates in a state where they are not folded at the inclined folding portions. In the state of being three-dimensionally assembled from the primary assembled product, the adhesive pieces are in a state of being folded at the inclined folding portions.

Description

Technical Field

[0001] The present invention relates to a packaging box that is easy to produce and assemble and has excellent aesthetics.

Background Art

[0002] Conventional cardboard boxes, for example, in a rectangular parallelepiped-shaped cardboard box, a sticking piece is provided at the left end edge of the rear side plate via a fold line, and a trapezoidal notch is provided at approximately the center of the lower end edge via a fold line at the lower end edge of the rear side plate. A substantially square bottom plate is provided, and a fold line is provided on a straight line connecting the right vertex of the trapezoidal notch of this bottom plate to the lower right corner of the rear side plate. A rectangular right side plate is provided at the right end edge of the rear side plate via a fold line, and an inverted trapezoidal bottom plate is provided at the lower end edge of this right side plate via a fold line. A front side plate having the same shape and size as the rear side plate is provided at the right end edge of the right side plate via a fold line. At the lower end edge of the front side plate, a substantially square bottom plate provided with a trapezoidal notch at approximately the center of the lower end edge via a fold line is provided. A fold line is provided on a straight line connecting the right vertex of the trapezoidal notch of this bottom plate to the lower right corner of the front side plate. A left side plate having the same shape and size as the right side plate is provided at the right end edge of the front side plate via a fold line, and an inverted trapezoidal bottom plate is provided at the lower end edge of this left side plate via a fold line. Such a cardboard box is known. To assemble this cardboard box, the sticking piece, rear side plate, right side plate, front side plate, and left side plate are folded into a corner tube shape, and the sticking piece is attached to the inner surface of the left side plate. To close the opening of this corner tube shape, the bottom plates are folded inward at each fold line to engage and combine the bottom plates, and the inner surface of the edge side portion from the fold line of the bottom plate is attached to the outer surface of the trapezoidal bottom plate. Such a cardboard box can be folded flat and stored when not in use. In this state, the edge side portion from the fold line of the bottom plate is folded, and it is unfolded when assembled (see Patent Document 1).

Prior Art Documents

Patent Documents

Patent Document 1

[0003] However, since the inner surface of the edge side portion from the crease of the bottom plate is adhered to the outer surface of the bottom plate in the above cardboard box, the crease of the bottom plate and the edge side portion from the crease are exposed on the outer surface, resulting in an unfavorable appearance. Also, when producing such a cardboard box by machine, the creases between the rear side plate, the right side plate, the front side plate, and the left side plate and each bottom plate are folded and overlapped, the edge side portion is folded back from the crease of the bottom plate, the crease between the rear side plate and the right side plate is folded and overlapped, the crease between the front side plate and the left side plate is folded and overlapped, the sticking piece is adhered inside the left side plate, and the inner surface of the edge side portion from the crease of the folded-back bottom plate is adhered to the outer surface of the trapezoidal bottom plate to form a flat primary assembled product. When producing in this way, an operation of folding back the edge side portion from the crease of the bottom plate is required, and the process has been complicated.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made to solve the above problems. The object of the present invention is to provide a packaging box that is easy to produce and assemble and has excellent aesthetics.

Means for Solving the Problems

[0005] The problems to be solved by the present invention are as described above. Next, the means for solving these problems will be described.

[0006] The first invention is a packaging box comprising a rectangular tubular body portion and an end portion formed by end plates continuously provided on four sides of the opening side of the body portion, wherein a pair of opposing end plates are provided with adhesive pieces via inclined bending portions extending from near the corners of the body portion, and the adhesive pieces are adhered to other adjacent end plates to close the opening. In the state of the primary assembled product, the body portion is folded flat, the end plates are folded flat overlapping the body portion, and the adhesive pieces are adhered to the adjacent end plates in a state of not being folded at the inclined bending portions. In the state of being three-dimensionally assembled from the primary assembled product, the adhesive pieces are in a state of being folded at the inclined bending portions.

[0007] The second invention is the first invention, which is a packaging box characterized by having a through-hole portion at the end portion.

Effects of the Invention

[0008] In the first invention, in the state of the primary assembled product, the body portion is folded flat, the end plate is folded flat overlapping the body portion, and the adhesive piece is adhered to the adjacent end plate without being folded at the inclined folding portion. In the state of being three-dimensionally assembled from the primary assembled product, the adhesive piece is in a state of being folded at the inclined folding portion. Therefore, the adhesive piece does not appear on the outer surface of the packaging box and has excellent aesthetics. Also, in producing up to the state of the primary assembled product, since the adhesive piece is not folded, the process is simple and production is easy. In the final assembly, by simply making the body portion into a square tube shape, the end plate rises up in conjunction and the end portion can be closed, and it can be easily assembled.

[0009] In the second invention, which is the first invention, the packaging box covers the inner box and has a through-hole portion at the end portion. Therefore, the inner box can be easily taken out by pushing it from the through-hole portion of the packaging box.

[0010]

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0012] Next, embodiments of the present invention will be described. First, the primary assembled product in the present embodiment refers to a form in which a developed sheet for creating a packaging box is folded and processed and then transported and stored. Also, the final assembly refers to a form in which the packaging box is finally three-dimensionally assembled from the primary assembled product when using the packaging box. In addition, the bending portion in the present embodiment refers to a streak-like portion provided for bending the developed sheet. Examples of the formation of the bending portion include by a score line, a cut line, a sewing line, etc., and it is illustrated by a broken line.

[0013] The packaging box 1 can be formed of cardboard such as paperboard or corrugated cardboard, but in this embodiment, paperboard with a thickness of about 0.5 mm is used. The packaging box 1 is formed by assembling the developed sheet 2 shown in FIG. 2, and the front side of the paper surface is shown as the inner surface side of the box.

[0014] In the state where the final assembly is completed, the packaging box 1 closes the opening of the rectangular tube-shaped body portion 3 with the end portion 4. Also, the packaging box 1 covers the inner box 30 as shown in FIG. 1.

[0015] The packaging box 1 of the present embodiment is transported and stored in the state of the primary assembled product shown in FIG. 4 by folding the developed sheet 2 shown in FIG. 2, and is finally three-dimensionally assembled as shown in FIG. 5.

[0016] First, the steps until the primary assembled product of the packaging box 1 according to the present embodiment is formed will be described with reference to FIGS. 2 to 4.

[0017] The developed sheet 2 shown in FIG. 2 will be described. The unfolded sheet 2 has a second side plate 12 connected to the right end of the first side plate 11 via a bent portion. Also, a third side plate 13 is connected to the right end of the second side plate 12 via a bent portion. Further, a fourth side plate 14 is connected to the right end of the third side plate 13 via a bent portion. Additionally, an adhering piece 15 is connected to the right end of the fourth side plate 14 via a bent portion. The upper ends of the first side plate 11 and the third side plate 13 are cut obliquely. The second side plate 12 and the fourth side plate 14 are square-shaped. The first side plate 11, the second side plate 12, the third side plate 13, the fourth side plate 14, and the adhering piece 15 form the body portion 3.

[0018] Also, a first end plate 16 is connected to the lower end of the first side plate 11 via a bent portion. A second end plate 17 is connected to the lower end of the second side plate 12 via a bent portion. A third end plate 18 is connected to the lower end of the third side plate 13 via a bent portion. A fourth end plate 19 is connected to the lower end of the fourth side plate 14 via a bent portion. The first end plate 16, the second end plate 17, the third end plate 18, and the fourth end plate 19 form the end portion 4.

[0019] The edges of the first end plate 16, the second end plate 17, the third end plate 18, and the fourth end plate 19 have a parallel portion parallel to the bent portion between the first side plate 11, the second side plate 12, the third side plate 13, and the fourth side plate, and a protruding portion protruding therefrom. The vertical width W between the bent portion between the first end plate 16, the second end plate 17, the third end plate 18, the fourth end plate 19 and the first side plate 11, the second side plate 12, the third side plate 13, the fourth side plate, and the parallel portion is set as the vertical width that creates a space between the first end plate 16 and the third end plate 18 facing each other, and between the second end plate 17 and the fourth end plate 19 facing each other in the assembled and completed state of the packaging box 1. In this embodiment, the left - right width of the first side plate 11 and the third side plate 13 is 133 mm, the left - right width of the second side plate 12 and the fourth side plate 14 is 140 mm, and the vertical width W of the first end plate 16, the second end plate 17, the third end plate 18, and the fourth end plate 19 is set to 40 mm. Further, the second end plate 17 extends at an angle inclined 45 degrees from near the bent portion between the first side plate 11 and the second side plate 12, and includes an inclined bent portion 20 reaching between the parallel portion and the protruding portion of the second end plate 17. On the protruding portion side partitioned by the inclined bent portion 20, an adhesive piece 21 is formed. Also, the fourth end plate 19 extends at an angle inclined 45 degrees from near the bent portion between the third side plate 13 and the fourth side plate 14, and includes an inclined bent portion 22 reaching between the parallel portion and the protruding portion of the fourth end plate 19. On the protruding portion side partitioned by the inclined bent portion 22, an adhesive piece 23 is formed.

[0020] Next, the process of using the unfolded sheet 2 as a primary assembled product will be described. First, as shown in FIG. 3, the bent portion between the first side plate 11 and the first end plate 16 is folded and overlapped, the bent portion between the second side plate 12 and the second end plate 17 is folded and overlapped, the bent portion between the third side plate 13 and the third end plate 18 is folded and overlapped, and the bent portion between the fourth side plate 14 and the fourth end plate 19 is folded and overlapped. Next, an adhesive is applied to the outer surfaces of the adhesive pieces 21 and 23. Then, as shown in FIG. 4, the bent portion between the first side plate 11 and the second side plate 12 is folded and overlapped, the bent portion between the third side plate 13 and the fourth side plate 14 is folded and overlapped, and an adhesive is applied to the outer surface of the adhesive piece 15 and adhered to the inner surface of the first side plate 11. At this time, the first end plate 16 and the second end plate 17 overlap, and the adhesive piece 21 is adhered to the adjacent first end plate 16 in a non-folded state. Also, the third end plate 18 and the fourth end plate 19 overlap, and the adhesive piece 23 is adhered to the adjacent third end plate 18 in a non-folded state, and in this state, it becomes a primary assembled product. In this way, when producing the packaging box 1 to the state of the primary assembled product, since the adhesive pieces 21 and 23 are not folded, the process is simple and the production is easy.

[0021] To finally assemble the primary assembled parts of the packaging box 1, as shown in FIG. 5, the folded first side plate 11 and second side plate 12, and third side plate 13 and fourth side plate 14 are unfolded by pushing the bent portions between the first side plate 11 and the second side plate 12, and between the third side plate 13 and the fourth side plate 14 toward the center side to form the body portion 3 in a rectangular tube shape. Then, the first end plate 16 and the second end plate 17 adhered by the adhesive piece 21 rise from the first side plate 11 and the second side plate 12, and the adhesive piece 21 is folded inside the packaging box 1 at the inclined bent portion 20. Also, the third end plate 18 and the fourth end plate 19 adhered by the adhesive piece 23 also rise in conjunction with the third side plate 13 and the fourth side plate 14, and the adhesive piece 23 is folded inside the packaging box 1 at the inclined bent portion 22, and the opening end is closed by the first end plate 16, the second end plate 17, the third end plate 18, and the fourth end plate 19. As shown in FIG. 6, the end portion 4 is assembled and the final assembly is completed. Thus, since the adhesive piece 21 and the adhesive piece 23 are folded inside the packaging box 1, they do not appear on the outer surface of the packaging box 1 and have excellent aesthetics. Also, a space is formed between the opposing first end plate 16 and third end plate 18 of the end portion 4, and between the opposing second end plate 17 and fourth end plate 19, and a through hole portion 24 is formed in a portion where the first end plate 16, the second end plate 17, the third end plate 18, and the fourth end plate 19 do not interfere.

[0022] The finally assembled packaging box 1 is open on the side opposite to the end portion 4, and the opening end is cut obliquely.

[0023] Also, the packaging box 1 in the present embodiment covers the inner box 30. The inner box 30 stacked in two stages is inserted through the opening of the packaging box 1 (see FIG. 1). The inner box 30 of the present embodiment is a so-called sack box and is provided with lids that are inserted into both ends of a rectangular tube shape. The inner box is not limited to a sack box and may be a lid-type box or the like.

[0024] The inner box 30 stored in the packaging box 1 is set so that the packaging box 1 and the inner box 30 fit together to prevent the inner box 30 from accidentally falling out. For this reason, there is a problem that it is difficult to take out the inner box 30 from the packaging box 1. In this embodiment, when taking out the stored inner box 30 from the packaging box 1, it can be easily taken out by pushing out the inner box 30 through the through-hole portion 24 of the end portion 4 (see FIG. 7).

[0025] As described above, the embodiments of the present invention have been described, but the present invention is not limited to these embodiments. The technical scope of the present invention is not limited to the described embodiments, but extends widely to the entire scope of the technical idea truly intended by the invention revealed from the matters described in this specification and the drawings.

Explanation of Reference Numerals

[0026] 1 Packaging box 2 Expansion sheet 3 Body portion 4 End portion 11 First side plate 12 Second side plate 13 Third side plate 14 Fourth side plate 15 Adhesive piece 16 First end plate 17 Second end plate 18 Third end plate 19 Fourth end plate 20, 22 Inclined bending portion 21, 23 Adhesive piece 24 Through-hole portion

Claims

1. 1. A packaging box comprising a rectangular tubular body and end portions each consisting of an end plate connected to each of the four sides of the opening of the body, a pair of opposing end plates each having an adhesive strip attached via an inclined fold extending from near a corner of the body, the adhesive strip being attached to an adjacent end plate to close the opening, wherein, in a primary assembled state, the body is folded flat and the end plate is folded flat overlapping the body, the adhesive strip is attached to the adjacent end plate in an unfolded state at the inclined fold, and when assembled three-dimensionally from the primary assembled state, the adhesive strip is folded at the inclined fold.

2. 2. The packaging box according to claim 1, wherein the packaging box covers the inner box and has a through hole at the end.

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