Packing box

Abstract

To provide a packing box with excellent design and capable of facilitating resealing after opening.SOLUTION: A box body forming piece 10 for forming a packing box 1 has an auxiliary plate 20, a first side plate 21, a second side plate 22, a third side plate 23, a fourth side plate 24, and a glue allowance piece 25, a first lid piece 43A extending in an upper portion of the third side plate 23, and a resealing piece 200A connected to the upper portion of the auxiliary plate 20. Also provided in the upper portion of the first side plate 21 is an opening portion 210A surrounded with an end side of the first side plate 21 and a first break line 61A formed on the first side plate 21. A tube body is formed by bonding back surfaces of the auxiliary plate 20 and the first side plate 21 together and bonding surfaces of the auxiliary plate 20 and the glue allowance piece 25 together. By bonding a bonded body made by bonding the back surfaces of the resealing piece 200A and the opening portion 210A together and the first lid piece 43A, a lid portion 7A is formed to seal the opening on the upper end portion of the tube body.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] 2. Description of the Related Art Packaging boxes for containing and transporting merchandise and displaying them in stores are known which are made by assembling box-forming pieces which are punched out integrally from a blank sheet into a cylindrical shape.

[0003] For example, the packaging box of Patent Document 1 is formed by assembling box-forming pieces having connected adhesive pieces, a first side panel, a second side panel, a third side panel and a fourth side panel, an opening portion defined in the first side panel by a break line, an outer lid piece extending from the upper end of the first side panel, a flap extending from the upper ends of the first and third side panels, an inner lid piece extending from the upper end of the third side panel, an auxiliary plate extending from one side end of the outer lid piece, and a resealing piece extending from the lower end of the auxiliary plate.

[0004] In a packaging box having such a configuration, after opening, it is possible to reseal the box by inserting the resealing piece between the pair of flaps and the first side panel. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3210136 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the packaging box of Patent Document 1, the side of the fourth side panel (cross section of the blank sheet) is exposed to the outside when assembled. In addition, the auxiliary plate is extended from one end of the outer lid piece, and in the assembled state, the auxiliary plate is folded 180° to the outer lid piece, and their back surfaces are glued together, so that the folded side is thicker than the opposite side, and the shape of the lid part consisting of the laminate of the inner lid piece, the reinforcing plate, and the outer lid piece becomes distorted. Thus, the packaging box of Patent Document 1 has a problem of poor design.

[0007] The present invention has been made in consideration of such problems, and has an object to provide a packaging box that is excellent in design and can be easily resealed after being opened. [Means for solving the problem]

[0008] These objects can be achieved by the present invention described below in (1) to (9).

[0009] (1) It consists of a box-forming piece punched out integrally from a single blank sheet, The box-forming piece is An auxiliary plate, a first side plate, a second side plate, a third side plate, a fourth side plate, and a glue strip connected in sequence along a connection direction; A first cover piece extending from one end of the third side panel in a direction perpendicular to the connecting direction; a reclosure piece connected to one end of the auxiliary plate in the orthogonal direction, An opening portion is provided at one end of the first side panel in the orthogonal direction and is surrounded by an end edge of the first side panel and a first break line formed on the first side panel, The rear surfaces of the auxiliary plate and the first side plate are joined together, and the front surfaces of the auxiliary plate and the adhesive strip are joined together to form a cylindrical body. a lid portion that closes an opening at one end of the cylindrical body is formed by joining the resealing piece and the opening portion together, and joining the first lid piece to the joined body, A resealable packaging box, characterized in that the lid portion can be opened by breaking both the first break line and the second break line, and after opening, the lid portion can be resealed by engaging the resealing piece with the opening end portion of the cylindrical body.

[0010] (2) The packaging box according to (1) above, wherein a notch is formed between the auxiliary plate and the resealing piece to separate a part of the resealing piece from the auxiliary plate.

[0011] (3) A second cap piece is provided extending from the resealing piece, The packaging box according to (1) or (2) above, wherein the lid portion is formed by joining the first lid piece and the second lid piece.

[0012] (4) A third flap extending from the opening portion, The packaging box according to (1) or (2) above, wherein the lid portion is formed by joining the first lid piece and the third lid piece.

[0013] (5) a second closure piece extending from the resealing piece; A third lid piece extending from the opening portion, The packaging box according to (1) or (2) above, wherein the lid portion is formed by joining the first lid piece to a joint body formed by joining the back surfaces of the second lid piece and the third lid piece together.

[0014] (6) The packaging box according to (5) above, which has an opening formed at the boundary between the reseal piece and the second lid piece.

[0015] (7) A packaging box according to any one of (1) to (6) above, wherein the adhesive piece has a cover piece that overlaps the inside of the opening when assembled.

[0016] (8) The packaging box according to (7) above, wherein a mark is formed on the surface of the cover piece to indicate that the lid portion has already been opened.

[0017] (9) The resealing piece is substantially trapezoidal and asymmetrical with respect to an axis along the orthogonal direction, The packaging box according to any one of (1) to (8) above, wherein the oblique side on the first side panel side is a straight line, and the oblique side on the opposite side is a curved line. Effect of the Invention

[0018] According to the present invention, since the adhesive strip is extended from the fourth side panel, the side surface of the fourth side panel (cross section of the blank sheet) is not exposed to the outside in the assembled state. Also, since the auxiliary plate is extended from the first side panel, the shape of the lid is not distorted. Therefore, the packaging box has excellent design. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a development view of the packaging box according to the first embodiment. [Diagram 2] 1 is a development view showing an assembly procedure for the packaging box. [Diagram 3] 1 is a development view showing an assembly procedure for the packaging box. [Figure 4] 11A to 11C are bottom views showing the assembly procedure of the packaging box. [Diagram 5] 10A to 10C are top views showing the assembly procedure of the packaging box. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 11 is a development view of a packaging box according to a second embodiment. [Figure 9] 1 is a development view showing an assembly procedure for the packaging box. [Figure 10] 1 is a development view showing an assembly procedure for the packaging box. [Figure 11] 11A to 11C are bottom views showing the assembly procedure of the packaging box. [Figure 12] 10A to 10C are top views showing the assembly procedure of the packaging box. [Figure 13] FIG. 4 is a plan view of the lid portion as seen from the back side. [Figure 14]FIG. 11 is a development view of a packaging box according to a third embodiment. [Figure 15] 11A to 11C are bottom views showing the assembly procedure of the packaging box. [Figure 16] 10A to 10C are top views showing the assembly procedure of the packaging box. [Figure 17] FIG. 13 is a development view of a packaging box according to a fourth embodiment. [Figure 18] FIG. [Figure 19] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First Embodiment The packaging box 1 of this embodiment is formed by assembling box-body forming pieces 10 that are integrally formed by punching out a blank sheet made of paper or the like. For ease of explanation, the folding method that makes the front surface of the box-body forming pieces 10 convex is also referred to as a "normal folding", and the folding method that makes the back surface convex is also referred to as a "reverse folding". In addition, the upper side in Fig. 1 is referred to as the "top" and the lower side is referred to as the "bottom".

[0021] FIG. 1 is a development view of the box-forming piece 10 seen from the back. As shown in the figure, the box-forming piece 10 has an auxiliary plate 20, a first side plate 21, a second side plate 22, a third side plate 23, a fourth side plate 24, and a glue strip 25 that are connected along the connection direction, which is the horizontal direction of the paper. The connection direction coincides with the grain of the blank sheet. In addition, the auxiliary plate 20, the first side plate 21, the second side plate 22, the third side plate 23, the fourth side plate 24, and the glue strip 25 are each divided by fold lines 31, 32, 33, 34, and 35 that extend in the height direction, which is the direction perpendicular to the connection direction.

[0022] Specifically, the auxiliary plate 20 and the first side plate 21 are separated by a fold line 31, the first side plate 21 and the second side plate 22 are separated by a fold line 32, the second side plate 22 and the third side plate 23 are separated by a fold line 33, the third side plate 23 and the fourth side plate 24 are separated by a fold line 34, and the fourth side plate 24 and the glue piece 25 are separated by a fold line 35.

[0023] The first and second side panels 21, 23 have the same width (length in the connecting direction), and the second and fourth side panels 22, 24 have the same width (length in the connecting direction). The widths of the first and third side panels 21, 23 are greater than the widths of the second and fourth side panels 22, 24. However, the relationship between the widths of the first and third side panels 21, 23 and the widths of the second and fourth side panels 22, 24 is not limited to this.

[0024] In addition, the length (height direction) of the third side panel 23 is slightly longer than the lengths of the second and fourth side panels 22, 24 located adjacent to it, and at the upper and lower ends, a step approximately the thickness of the blank sheet is formed between the third side panel 23 and the second and fourth side panels 22, 24.

[0025] A first lid piece 43A extends from the upper end of the third side panel 23, and the third side panel 23 and the first lid piece 43A are separated by a fold line 53A extending in the connecting direction. The first lid piece 43A is trapezoidal and has approximately the same size as the opening on the upper end side of the packaging box 1.

[0026] Similarly, a first lid piece 43B extends from the lower end of the third side panel 23, and the third side panel 23 and the first lid piece 43B are separated by a fold line 53B extending in the connecting direction. The first lid piece 43B is trapezoidal and has approximately the same size as the opening on the lower end side of the packaging box 1.

[0027] Further, a first break line 61A is formed at the upper end of the first side panel 21. The first break line 61A is U-shaped with both ends connected to the upper end edge of the first side panel 21, and the portion surrounded by the upper end edge of the first side panel 21 and the first break line 61A forms the opening portion 210A. The opening portion 210A is trapezoidal. However, the shape of the opening portion 210A is not particularly limited.

[0028] Similarly, a first break line 61B is formed at the lower end of the first side panel 21. The first break line 61B is U-shaped with both ends connected to the lower end edge of the first side panel 21, and the portion surrounded by the lower end edge of the first side panel 21 and the first break line 61B forms the opening portion 210B. The opening portion 210B is trapezoidal. However, the shape of the opening portion 210B is not particularly limited.

[0029] A resealing piece 200A extends from the upper end of the auxiliary plate 20, and the auxiliary plate 20 and the resealing piece 200A are separated by a second breaking line 60A. The resealing piece 200A is arranged next to the opening portion 210A in the connecting direction, and overlaps with each other in the assembled state. The resealing piece 200A is generally trapezoidal in shape, the width of which gradually decreases toward the bottom, and is asymmetrical with respect to the central axis J along the height direction (the direction perpendicular to the connecting direction).

[0030] In the illustrated configuration, both base sides are aligned along the connecting direction, one oblique side (on the first side panel 21 side) is a straight line, and the other oblique side is a curved line in an arc shape. By configuring one oblique side (on the first side panel 21 side) as a straight line, it becomes easy to fold normally along the fold line 31. This makes it easier to assemble the packaging box 1. On the other hand, by configuring the other oblique side as a curved line in an arc shape, the resealing piece 200A can be made larger, improving the resealing function. However, the shape of the resealing piece 200A is not particularly limited.

[0031] In addition, a notch 201A is formed between the auxiliary plate 20 and the reclosure piece 200A to separate a part of the reclosure piece 200A (the oblique side formed by the curved convex line) from the auxiliary plate 20. By forming the notch 201A and separating a part of the reclosure piece 200A from the auxiliary plate 20 in advance, it becomes easier to cut off the reclosure piece 200A from the auxiliary plate 20.

[0032] Similarly, a reclosure piece 200B extends from the lower end of the auxiliary plate 20, and the auxiliary plate 20 and the reclosure piece 200B are separated by a second break line 60B. The reclosure piece 200B is arranged side by side with the opening portion 210B in the connecting direction, and overlaps with each other in the assembled state. The reclosure piece 200B is generally trapezoidal in shape, the width of which gradually decreases toward the upper side, and is asymmetrical with respect to the central axis J. The reclosure piece 200B has the same shape as the reclosure piece 200A, and therefore a detailed description thereof will be omitted.

[0033] In addition, a notch 201B is formed between the auxiliary plate 20 and the reclosure piece 200B to separate a part of the reclosure piece 200B (the oblique side formed by the curved convex line) from the auxiliary plate 20. By forming the notch 201B and separating a part of the reclosure piece 200B from the auxiliary plate 20 in advance, it becomes easier to cut off the reclosure piece 200B from the auxiliary plate 20.

[0034] In addition, a second flap 40A is extended from the upper end of the resealing piece 200A, and the resealing piece 200A and the second flap 40A are separated by a fold line 50A extending in the connecting direction. The second flap 40A is arranged side by side with the first flap 43A in the connecting direction. The second flap 40A is a trapezoid smaller than the first flap 43A, and overlaps with the back side of the first flap 43A when the packaging box 1 is assembled. The back sides of the second flap 40A and the first flap 43A are glued together to form a flap portion 7A, and the opening at the upper end side of the packaging box 1 is closed by the flap portion 7A.

[0035] Further, at the boundary between the reclosure piece 200A and the second lid piece 40A, notches 26A and 27A are formed on both sides.

[0036] Similarly, a second flap 40B extends from the lower end of the resealing piece 200B, and the resealing piece 200B and the second flap 40B are separated by a fold line 50B extending in the connecting direction. The second flap 40B is arranged next to the first flap 43B in the connecting direction. The second flap 40B is a trapezoid smaller than the first flap 43B, and overlaps the back side of the first flap 43B when the packaging box 1 is assembled. The back sides of the second flap 40B and the first flap 43B are glued together to form the flap 7B, and the opening at the lower end side of the packaging box 1 is closed by the flap 7B.

[0037] Further, at the boundary between the reclosure piece 200B and the second lid piece 40B, notches 26B and 27B are formed on both sides.

[0038] A flap 42A extends from the upper end of the second side panel 22, and the second side panel 22 and the flap 42A are separated by a fold line 52A extending in the connecting direction. A flap 44A extends from the upper end of the fourth side panel 24, and the fourth side panel 24 and the flap 44A are separated by a fold line 54A extending in the connecting direction. These flaps 42A and 44A are each trapezoidal. When the packaging box 1 is assembled, the flaps 42A and 44A are each located inside the lid portion 7A, preventing the lid portion 7A from slipping into the packaging box 1.

[0039] Similarly, a flap 42B extends from the lower end of the second side panel 22, and the second side panel 22 and the flap 42B are separated by a fold line 52B extending in the connecting direction. A flap 44B extends from the lower end of the fourth side panel 24, and the fourth side panel 24 and the flap 44B are separated by a fold line 54B along the connecting direction. Each of these flaps 42B, 44B is trapezoidal. When the packaging box 1 is assembled, the flaps 42B, 44B are located inside the lid portion 7B to prevent the lid portion 7B from slipping into the packaging box 1.

[0040] The above is a detailed explanation of the configuration of the packaging box 1. Next, an example of a method of assembling and using the packaging box 1 will be described.

[0041] First, glue B1 is applied to three places on the back surface of the first side panel 21 (the opening portions 210A, 210B, and the remaining portions). Next, the fold line 31 is folded forward at 180°, and the back surfaces of the auxiliary panel 20 and the first side panel 21, the back surfaces of the resealing piece 200A and the opening portion 210A, and the back surfaces of the resealing piece 200B and the opening portion 210B are glued together. This results in the state shown in FIG. 2. Next, the fold line 34 is folded forward at 180°, and glue B2 is applied to the surface of the glue strip 25. Next, the fold line 32 is folded forward at 180°, and the surfaces of the glue strip 25 and the auxiliary panel 20 are glued together. This results in the finished state (state immediately before assembly) shown in FIG. 3.

[0042] Next, in a factory where the contents are stored and packaged, the fold lines 32, 33, 34, and 35 are folded at 90° each to form a rectangular tube. Next, as shown in FIG. 4(a), the flaps 42B and 44B are folded at 90° along the fold lines 52B and 54B. Next, as shown in FIG. 4(b), the second lid piece 40B is folded backward at 90° along the fold line 50B. Next, glue B3 is applied to the back surface of the second lid piece 40B, and as shown in FIG. 4(c), the first lid piece 43B is folded at 90° along the fold line 53B, and the back surfaces of the second lid piece 40B and the first lid piece 43B are glued together.

[0043] As a result, the assembly (laminate) of the reseal piece 200B and the opening portion 210B is glued to the first lid piece 43B via the second lid piece 40B to form the lid portion 7B. The opening on the lower end side of the packaging box 1 is then closed by this lid portion 7B, completing the bottom surface of the packaging box 1. With this configuration, the lid portion 7B is formed by the laminate of the first and second lid pieces 43B, 40B, so that the strength (rigidity) of the lid portion 7B is increased and good opening properties can be achieved.

[0044] 4, the first lid piece 43B is placed on the upper side of the second lid piece 40B and their back surfaces are glued together, but this is not limited thereto, and the second lid piece 40B may be placed on the upper side of the first lid piece 43B and their front surfaces may be glued together. In other words, the second lid piece 40B may be the inner lid piece and the first lid piece 43B may be the outer lid piece, or the first lid piece 43B may be the inner lid piece and the second lid piece 40B may be the outer lid piece.

[0045] Next, in this state, an item (not shown) is placed in the packaging box 1 through the opening at the top end side of the packaging box 1. After the items have been placed in the packaging box 1, the top surface is formed in the same manner as the bottom surface. That is, first, as shown in FIG. 5(a), the flaps 42A and 44A are folded forward at 90° along the fold lines 52A and 54A, respectively, and then, as shown in FIG. 5(b), the second lid piece 40A is folded backward at 90° along the fold line 50A. Next, glue B4 is applied to the back surface of the second lid piece 40A, and as shown in FIG. 5(c), the first lid piece 43A is folded forward at 90° along the fold line 52A, and the back surfaces of the second lid piece 40A and the first lid piece 43A are glued together.

[0046] As a result, the assembly of the reclosure piece 200A and the opening portion 210A is glued to the first lid piece 43A via the second lid piece 40A to form the lid portion 7A. The opening at the upper end side of the packaging box 1 is then closed by this lid portion 7A, completing the top surface of the packaging box 1. With this configuration, the lid portion 7A is formed by a laminate of the first and second lid pieces 43A, 40A, so that the strength (rigidity) of the lid portion 7A is increased and good opening properties can be achieved.

[0047] Through the above steps, the packaging box 1 is assembled and packaging of the contents is completed.

[0048] 5, the first lid piece 43A is placed on the upper side of the second lid piece 40A and their back surfaces are glued together, but this is not limited thereto, and the second lid piece 40A may be placed on the upper side of the first lid piece 43A and their front surfaces may be glued together. In other words, the second lid piece 40A may be the inner lid piece and the first lid piece 43A may be the outer lid piece, or the first lid piece 43A may be the inner lid piece and the second lid piece 40A may be the outer lid piece.

[0049] When removing the contents from the packaging box 1, the opening portion 210A of the first side panel 21 is pressed with a finger to break the first and second breaking lines 61A, 60A, and the opening portion 210A is separated from the first side panel 21 and the resealing piece 200A is separated from the auxiliary panel 20. Then, the fingers are hooked on the inside of the lid portion 7A and the lid portion 7A is raised, thereby opening the packaging box 1 as shown in Fig. 6. Then, the flaps 42A, 44A are opened to open the packaging box 1, and the contents inside the packaging box 1 can be removed.

[0050] After opening, when returning the contents to the packaging box 1 and resealing it, the resealing piece 200A is inserted into the gap between the flaps 42A, 44A and the first side panel 21 and engaged with it, thereby closing the opening at the upper end side of the packaging box 1 with the lid part 7A. This completes the resealing. In particular, in this embodiment, the flaps 44A, 42A enter the notches 26A, 27A, and the resealing piece 200A is hooked on the flaps 44A, 42A, so that the closed state can be maintained more reliably. In addition, the resealing piece 200A is approximately trapezoidal and tapers in the insertion direction, so that it can be easily inserted into the gap between the flaps 42A, 44A and the first side panel 21. In addition, in the resealed state, the opening of the first side panel 21 formed by removing the opening part 210A is blocked by the resealing piece 200A, so that the contents can be prevented from scattering from that part.

[0051] When disassembling the packaging box 1 for disposal, the lid portion 7B is opened in the same manner as when it was opened, and the packaging box 1 is folded thinly in the same manner as when it was in a pasted state. This allows it to be disposed of in a compact form.

[0052] According to the packaging box 1 as described above, the auxiliary plate 20 is extended from the first side plate 21 located at one end of the four first, second, third, and fourth side plates 21, 22, 23, and 24, and the adhesive strip 25 is extended from the fourth side plate 24 located at the other end. The auxiliary plate 20, the back surface of which is glued to the back surface of the first side plate 21, and the adhesive strip 25 are glued together to assemble the box, so that the cross section of the blank sheet is not exposed to the outside at the joint portion between the auxiliary plate 20 and the adhesive strip 25 (the portion where the auxiliary plate 20 and the adhesive strip 25 overlap). Therefore, the packaging box 1 has excellent design. In addition, the first lid piece 43A and the second lid piece 40A are not connected at their side ends by a fold line as in the conventional case, and the separate bodies are integrated by gluing, so that the thickness distribution of the lid portion 7A is suppressed. Therefore, the packaging box 1 has excellent design.

[0053] <Second embodiment> The packaging box 1 according to this embodiment is similar to the packaging box 1 according to the first embodiment, except that the configurations of the lids 7A and 7B are different. Therefore, in the following description, the packaging box 1 according to this embodiment will be described with a focus on the differences from the first embodiment, and the description of the similarities will be omitted. In addition, in each drawing of this embodiment, the same reference numerals are used for the same configurations as those in the above-mentioned embodiment.

[0054] 8 is a development view of the box forming piece 10 of this embodiment seen from the back. As shown in the figure, the third lid piece 41A is extended from the upper end of the first side panel 21, and the first side panel 21 and the third lid piece 41A are separated by a fold line 51A extending in the connecting direction. The first break line 61A is formed at the boundary between the first side panel 21 and the third lid piece 41A so as to divide them, and has both ends along the fold line 51A and a U-shaped central part that enters the first side panel 21 from the fold line 51A. The U-shaped central part and the part surrounded by the fold line 51A constitute the opening part 210A.

[0055] Similarly, a third lid piece 41B extends from the lower end of the first side panel 21, and the first side panel 21 and the third lid piece 41B are separated by a fold line 51B extending in the connecting direction. The first break line 61B is formed at the boundary between the first side panel 21 and the third lid piece 41B so as to divide them, and has both ends along the fold line 51B and a U-shaped central portion that enters the first side panel 21 from the fold line 51B. The U-shaped central portion and the portion surrounded by the fold line 51B constitute the opening portion 210B.

[0056] In addition, a through hole GA overlapping the fold line 50A is formed at the boundary between the second lid piece 40A and the reclosure piece 200A, and similarly, a through hole GB overlapping the fold line 50B is formed at the boundary between the second lid piece 40B and the reclosure piece 200B. The through holes GA and GB are each trapezoidal. However, the shapes of the through holes GA and GB are not particularly limited. Also, the through holes GA and GB may be omitted.

[0057] In addition, at the boundary between the resealing piece 200A and the second lid piece 40A, cuts 28A and 29A are formed on both sides. Each of the cuts 28A and 29A is L-shaped, has a horizontal extension portion located below the fold line 50A, extends in the connecting direction, and has a vertical extension portion extending upward from the tip of the horizontal extension portion and intersecting with the fold line 50A. With this configuration, when the fold line 50A is folded forward at 90°, the parts facing each other through the horizontal extension portion are separated from each other, and cuts 26A and 27A are formed between them.

[0058] Similarly, at the boundary between the resealing piece 200B and the second lid piece 40B, cuts 28B and 29B are formed on both sides. Each of the cuts 28B and 29B is L-shaped and has a horizontal extension portion located above the fold line 50B and extending in the connecting direction, and a vertical extension portion extending downward from the tip of the horizontal extension portion and intersecting with the fold line 50B. With this configuration, when the fold line 50B is folded back at 90°, the parts facing each other through the horizontal extension portion are separated from each other, and cuts 26B and 27B are formed between them.

[0059] The above is a detailed explanation of the configuration of the packaging box 1. Next, an example of a method of assembling and using the packaging box 1 will be described.

[0060] First, glue B1 is applied to three places on the back surface of the first side panel 21 (the opening portions 210A, 210B and the remaining portions) and the back surfaces of the third lid pieces 41A, 41B. Next, the fold line 31 is folded forward at 180°, and the back surfaces of the auxiliary panel 20 and the first side panel 21, the back surfaces of the resealing piece 200A and the opening portion 210A, the back surfaces of the resealing piece 200B and the opening portion 210B, the back surfaces of the second and third lid pieces 40A, 41A, and the back surfaces of the second and third lid pieces 40B, 41B are glued together. This results in the state shown in FIG. 9. Next, the fold line 34 is folded forward at 180°, and glue B2 is applied to the surface of the glue strip 25. Next, the fold line 32 is folded forward at 180°, and the surfaces of the glue strip 25 and the auxiliary panel 20 are glued together. As a result of the above, the finished state (state immediately before assembly) shown in FIG. 10 is obtained.

[0061] Next, in a factory where the contents are stored and packaged, the fold lines 32, 33, 34, and 35 are folded at 90° each to form a rectangular tube. Next, as shown in FIG. 11(a), the flaps 42B and 44B are folded at 90° along the fold lines 52B and 54B. Next, as shown in FIG. 11(b), the stack LB of the second and third lid pieces 40B and 41B is folded backward at 90° along the fold line 50B and folded at 90° along the fold line 51B. Next, glue B3 is applied to the back surface of the third lid piece 40B, and as shown in FIG. 11(c), the first lid piece 43B is folded at 90° along the fold line 53B, and the front surface of the third lid piece 41B and the back surface of the first lid piece 43B are glued together. As a result, the lid portion 7B is formed, and the opening at the lower end side of the packaging box 1 is closed by the lid portion 7B, completing the bottom surface of the packaging box 1. Note that, contrary to this embodiment, the laminate LB may be used as an outer lid piece.

[0062] Next, in this state, an item (not shown) is placed in the packaging box 1 through the opening at the top end side of the packaging box 1. After the items have been placed in the packaging box 1, the top surface is formed in the same manner as the bottom surface. That is, first, as shown in FIG. 12(a), the flaps 42A and 44A are folded forward at 90° along the fold lines 52A and 54A, respectively, and then, as shown in FIG. 12(b), the laminate LA of the second and third lid pieces 40A and 41A is folded backward at 90° along the fold line 50A and folded forward at 90° along the fold line 51A. Next, glue B4 is applied to the back surface of the third lid piece 40A, and as shown in FIG. 12(c), the first lid piece 43A is folded forward at 90° along the fold line 53A, and the front surface of the third lid piece 41A and the back surface of the first lid piece 43A are glued together. As a result, the lid portion 7A is formed, and the opening on the upper end side of the packaging box 1 is closed by the lid portion 7A, completing the top surface of the packaging box 1. Note that, contrary to this embodiment, the laminate LA may be used as an outer lid piece.

[0063] In this configuration, as shown in FIG. 13, the lid portion 7A is formed from a laminate of the first, second, and third lid pieces 43A, 40A, and 41A. Therefore, the strength of the lid portion 7A is increased, and good openability can be achieved. In particular, in this embodiment, a through hole GA is formed on the fold line 50A, and the overlap of the blank sheet on the fold line 51A is kept to a minimum. Therefore, it becomes easy to fold the resealing piece 200A with respect to the lid portion 7A, and good assembly and openability can be achieved. The same effect is achieved for the lid portion 7B.

[0064] The second embodiment has been described above. The second embodiment can also achieve the same effects as the first embodiment.

[0065] <Third embodiment> The packaging box 1 according to this embodiment is similar to the packaging box 1 according to the first embodiment, except that the configurations of the lids 7A and 7B are different. Therefore, in the following description, the packaging box 1 according to this embodiment will be described with a focus on the differences from the first embodiment, and the description of the similarities will be omitted. In addition, in each drawing of this embodiment, the same reference numerals are used for the same configurations as those in the above-mentioned embodiment.

[0066] FIG. 14 is a development view of the box-forming piece 10 of this embodiment seen from the back. As shown in the figure, in the box-forming piece 10 of this embodiment, the second lid pieces 40A, 40B are omitted from the first embodiment described above. Instead, a third lid piece 41A is extended from the upper end of the first side panel 21, and the first side panel 21 and the third lid piece 41A are separated by a fold line 51A extending in the connecting direction. In addition, the first break line 61A is formed at the boundary between the first side panel 21 and the third lid piece 41A so as to divide them, and has both ends along the fold line 51A and a U-shaped central portion that enters the first side panel 21 from the fold line 51A. The U-shaped central portion and the portion surrounded by the fold line 51A constitute the opening portion 210A.

[0067] Similarly, a third lid piece 41B extends from the lower end of the first side panel 21, and the first side panel 21 and the third lid piece 41B are separated by a fold line 51B extending in the connecting direction. The first break line 61B is formed at the boundary between the first side panel 21 and the third lid piece 41B so as to divide them, and has both ends along the fold line 51B and a U-shaped central portion that enters the first side panel 21 from the fold line 51B. The U-shaped central portion and the portion surrounded by the fold line 51B constitute the opening portion 210B.

[0068] The configuration of the packaging box 1 has been described in detail above. Next, an example of a method for assembling and using the packaging box 1 will be described. Note that the process up to the finished state (the state immediately before assembly) is the same as that of the first embodiment described above. Therefore, the description will be omitted.

[0069] Next, in a factory where the contents are stored and packaged, the fold lines 32, 33, 34, and 35 are folded at 90° to form a rectangular tube. Next, as shown in FIG. 15(a), the flaps 42B and 44B are folded at 90° along the fold lines 52B and 54B. Next, as shown in FIG. 15(b), the third lid piece 41B is folded at 90° along the fold line 51B. Next, glue B3 is applied to the surface of the third lid piece 41B, and as shown in FIG. 15(c), the first lid piece 43B is folded at 90° along the fold line 53B, and the surface of the third lid piece 41B and the back surface of the first lid piece 43B are glued together. As a result, the lid portion 7B is formed, and the opening at the lower end side of the packaging box 1 is closed by the lid portion 7B, completing the bottom surface of the packaging box 1. Note that, contrary to this embodiment, the third lid piece 41B may be an outer lid piece.

[0070] Next, in this state, an item (not shown) is placed in the packaging box 1 through the opening at the top end side of the packaging box 1. After the items are placed in the packaging box 1, the top surface is formed in the same manner as the bottom surface. That is, first, as shown in FIG. 16(a), the flaps 42A and 44A are folded 90° forward at the fold lines 52A and 54A, respectively, and then, as shown in FIG. 16(b), the third lid piece 41A is folded 90° backward at the fold line 50A and folded 90° forward at the fold line 51A. Next, glue B4 is applied to the surface of the third lid piece 41A, and as shown in FIG. 16(c), the first lid piece 43A is folded 90° forward at the fold line 53A, and the surface of the third lid piece 41A and the back surface of the first lid piece 43A are glued together. As a result, the lid portion 7A is formed, and the opening at the top end side of the packaging box 1 is closed by the lid portion 7A, completing the top surface of the packaging box 1. Contrary to this embodiment, the third lid piece 41A may be configured as an outer lid piece.

[0071] In this configuration, the lid portion 7A is formed from a laminate of the first and third lid pieces 43A and 41A. This increases the strength of the lid portion 7A, allowing it to be easily opened. The same effect can be achieved for the lid portion 7B.

[0072] The above describes the third embodiment. The third embodiment can also achieve the same effects as the first embodiment.

[0073] <Fourth embodiment> The packaging box 1 according to this embodiment is similar to the packaging box 1 according to the first embodiment, except for the shape of the resealing pieces 200A and 200B and the configuration of the adhesive piece 25. Therefore, in the following description, the packaging box 1 according to this embodiment will be described with a focus on the differences from the first embodiment, and the description of the similarities will be omitted. In addition, in each drawing of this embodiment, the same reference numerals are used for the same configurations as those in the above-mentioned embodiment.

[0074] 17 is a development view of the box forming piece 10 of this embodiment as seen from the back. As shown in the figure, the resealing pieces 200A and 200B are trapezoidal and symmetrical with respect to the central axis J. Therefore, the shape of the resealing pieces 200A and 200B is simple, and the packaging box 1 is easy to manufacture. The structure of the boundary between the resealing piece 200A and the second lid piece 40A is a structure in which the through hole GA is omitted from the second embodiment described above, and the incisions 28A and 29A and the fold line 50A are formed. The structure of the boundary between the resealing piece 200B and the second lid piece 40B is also the same.

[0075] In addition, a cover piece 250A is extended from the upper end of the adhesive strip 25, and the adhesive strip 25 and the cover piece 250A are separated by a fold line 65A on which a perforation is formed. In addition, the cover piece 250A is arranged side by side with the opening part 210A in the connecting direction. Similarly, a cover piece 250B is extended from the lower end of the adhesive strip 25, and the adhesive strip 25 and the cover piece 250B are separated by a fold line 65B on which a perforation is formed. In addition, the cover piece 250B is arranged side by side with the opening part 210B in the connecting direction. Each of these cover pieces 250A and 250B is rectangular, and a mark M that informs the user that the packaging box 1 has been opened is formed on the surface thereof by, for example, printing. The mark M in this embodiment is the character "opened". However, the mark M is not particularly limited.

[0076] When the packaging box 1 is assembled in the same manner as in the first embodiment described above, the surface of the cover piece 250A overlaps the inside of the opening portion 210A as shown in Fig. 18. The cover piece 250A has a function of preventing contact between the finger and the contents and protecting the contents from damage or contamination by abutting against the finger inserted into the opening portion 210A to open the lid portion 7A. In this embodiment, in order to prevent the cover piece 250A from impeding the insertion of the finger, a fold line 65A with a perforation is formed at the boundary with the adhesive piece 25, and the cover piece 250A is configured to be easily bent inward around the fold line 65A.

[0077] Also, when resealing, as shown in Fig. 19, the resealing piece 200A is inserted into the gap between the flaps 42A, 44A and the cover piece 250A (i.e., inside the cover piece 250A), thereby maintaining the mark M exposed to the outside. Therefore, the user can be easily notified that the packaging box 1 has been opened. Also, by exposing the cover piece 250A, the user can be notified as to which side, the top or bottom, the opening has been opened. Therefore, it is possible to prevent the lid portions 7A, 7B on both sides from being opened by mistake.

[0078] The resealing method is not limited to this, and for example, the resealing piece 200A may be inserted between the cover piece 250A and the first side plate 21, rather than inside the cover piece 250A. This allows the resealing piece 200A to be sandwiched between the cover piece 250A and the first side plate 21 and to be tightly engaged with each other. This makes it possible to more reliably maintain the resealed state.

[0079] The fourth embodiment has been described above. This fourth embodiment can also achieve the same effects as the first embodiment.

[0080] The packaging box of the present invention is not limited to the above-described embodiment, and the size, material, and shape of each component of the box body can be changed as appropriate. The above-described embodiments can also be combined as appropriate. In the above-described embodiment, the upper end side and the lower end side have the same configuration, but this is not limited thereto, and it is sufficient that at least one side has the above-described configuration. In other words, the configuration of one opening side is not particularly limited. In the above-described embodiment, the parts are joined by gluing, but the joining method is not particularly limited. [Explanation of symbols]

[0081] 1...packaging box, 10...box body forming piece, 20...auxiliary plate, 200A, 200B...resealing piece, 201A, 201B...notch, 21...first side plate, 210A, 210B...opening portion, 22...second side plate, 23...third side plate, 24...fourth side plate, 25...glue piece, 250A, 250B...cover piece, 26A, 26B, 27A, 27B...notch, 28A, 28B, 29A, 29B...notch, 31, 32, 33, 34, 35...fold line, 40A, 40B... Second cover piece, 41A, 41B...third cover piece, 42A, 42B...flap, 43A, 43B...first cover piece, 44A, 44B...flap, 50A, 50B, 51A, 51B, 52A, 52B, 53A, 53B, 54A, 54B...fold line, 60A, 60B...second break line, 61A, 61B...first break line, 65A, 65B...fold line, 7A, 7B...cover part, B1, B2, B3, B4...glue, GA, GB...through hole, J...center axis, LA, LB...laminated body, M...mark

Claims

1. It is made up of a box-forming piece punched out integrally from a single blank sheet, The box-forming piece is an auxiliary plate, a first side plate, a second side plate, a third side plate, a fourth side plate, and a glue strip connected in sequence along a connection direction; A first cover piece extending from one end of the third side panel in a direction perpendicular to the connecting direction; a reclosure piece connected to one end of the auxiliary plate in the orthogonal direction via a second breaking line, An opening portion is provided at one end of the first side panel in the orthogonal direction and is surrounded by an end edge of the first side panel and a first break line formed on the first side panel, The rear surfaces of the auxiliary plate and the first side plate are joined together, and the front surfaces of the auxiliary plate and the adhesive strip are joined together to form a cylindrical body. a lid portion that closes an opening at one end of the cylindrical body is formed by joining the resealing piece and the opening portion together, and joining the first lid piece to the joined body, A resealable packaging box, characterized in that the lid portion can be opened by breaking both the first break line and the second break line, and after opening, the lid portion can be resealed by engaging the resealing piece with the opening end portion of the cylindrical body.

2. 2. The packaging box according to claim 1, wherein a notch is formed between the auxiliary plate and the resealing piece for separating a part of the resealing piece from the auxiliary plate.

3. A second closure piece is provided extending from the resealing piece, The packaging box according to claim 1 or 2, wherein the lid portion is formed by joining the first lid piece and the second lid piece.

4. A third lid piece is provided extending from the opening portion, The packaging box according to claim 1 or 2, wherein the lid portion is formed by joining the first lid piece and the third lid piece.

5. A second closure piece extending from the reclosure piece; A third lid piece extending from the opening portion, The packaging box according to claim 1 or 2, wherein the lid portion is formed by joining the first lid piece to a joint body formed by joining back surfaces of the second lid piece and the third lid piece together.

6. The packaging box according to claim 5, further comprising a through hole formed at a boundary between the reseal piece and the second lid piece.

7. The packaging box according to claim 1 , wherein the adhesive piece has a cover piece that overlaps the inside of the opening portion in an assembled state.

8. 8. The packaging box according to claim 7, wherein a mark is formed on a surface of the cover piece to notify the user that the lid portion has already been opened.

9. The resealing piece is generally trapezoidal and asymmetrical with respect to an axis along the orthogonal direction, 9. The packaging box according to claim 1, wherein the oblique side on the first side panel side is a straight line, and the oblique side on the opposite side is a curved line.

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