Packing box

Abstract

The present invention provides a packaging box having a bottom portion, an inner box portion having an inner sleeve-like portion, and an outer box portion that covers the inner box portion, having an outer sleeve-like portion and a lid portion, wherein the product stored in the inner box portion can be displayed by removing the outer box portion, the inner boxes can be easily stacked, the inner boxes can be prevented from falling even if the upper inner box portion shifts in the left-right direction, and furthermore, the storage space of the inner box portion is not narrowed when the lid portion is closed. [Solution] The inner box portion A of the packaging box has an upper flap 110 connected to the front portion 10, an upper flap 120 connected to the side portion 20, an upper flap 130 connected to the side portion 30, and an upper flap 140 connected to the back portion 40. By engaging the engaging portions provided in the end regions of each upper flap with adjacent upper surfaces, a frame-like portion is formed by the four upper flaps 110 to 140.

Description

Technical Field

[0001] The present invention relates to a packaging box, which is related to a packaging box that assembles and packages a plurality of products and separates a part of the packaging box to display the products at a storefront or the like.

Background Art

[0002] The applicant has a bottom surface portion, an inner box portion having an inner sleeve-shaped portion, and an outer box portion covering the inner box portion. The outer box portion has an outer sleeve-shaped portion and a lid portion. By removing the outer box portion, products stored in the inner box portion can be displayed. As a packaging box that can stack the inner box portions, an application has been filed for the prior art document shown in Patent Document 1.

[0003] That is, in the packaging box of Patent Document 1, the inner box portion A has an upper surface portion 110 continuously provided from the upper side of the side surface portion 20 and an upper surface portion 130 continuously provided from the upper side of the side surface portion 30, and an inner side surface portion 120 continuously provided from the upper surface portion 110 and an inner side surface portion 140 continuously provided from the upper surface portion 130. The separation portion 124 in the inner side surface portion 120 is adhered to the side surface portion 20, and the separation portion 144 in the inner side surface portion 140 is adhered to the side surface portion 30. When the lid portions 270 and 280 of the outer box portion B are rotated and closed, the upper surface portions 110 and 130 are rotated by being pushed by the lid portions 270 and 280, and the cut lines of the two separation portions 124 and 144 are broken, and the inner side surface portions 120 and 140 contact the bottom surface portion 50, and the upper surface portions 110 and 130 are substantially parallel to the bottom surface portion 50. As a result, edge portions are formed at the upper ends of both the left and right sides of the inner box portion A by the upper surface portions 110 and 130, and the inner box portion A can be stacked. Further, the stacked state can be fixed by engaging the protruding portions 20-1 and 30-1 of the lower inner box portion A with the engaging holes 20-2 and 30-2 of the upper inner box portion A.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, in the packaging box of Patent Document 1, as described above, in order to stack the inner boxes, the protruding parts 20-1 and 30-1 must be precisely engaged with the engaging holes 20-2 and 30-2. This process of engaging the protruding parts 20-1 and 30-1 with the engaging holes 20-2 and 30-2 is cumbersome, making it difficult to stack them easily.

[0006] Furthermore, since edges formed by the upper surfaces 110 and 130 are only on the left and right sides of the inner box A, it is not possible to stack them stably. In particular, if the engagement between the protruding parts 20-1 and 30-1 and the engagement holes 20-2 and 30-2 is insufficient, and the upper inner box A shifts laterally, causing the bottom surface 50 to detach from one edge, the inner box A may fall.

[0007] Furthermore, when the lids 270 and 280 of the outer box B are rotated to close them, the top surfaces 110 and 130 are pushed by the lids 270 and 280 and rotate to become approximately parallel to the bottom surface 50. However, at this time, the inner side surfaces 120 and 140 protrude into the inner box A, which has the problem of narrowing the storage space of the inner box A.

[0008] Therefore, the present invention aims to provide a packaging box that has a bottom portion, an inner box portion having an inner sleeve-shaped portion, and an outer box portion covering the inner box portion, the outer box portion having an outer sleeve-shaped portion and a lid portion, and in which the goods stored in the inner box portion can be displayed by removing the outer box portion, the inner boxes can be easily stacked, the inner boxes can be prevented from falling even if the upper inner box portion shifts in the left-right direction, and furthermore, the storage space of the inner box portion is not narrowed when the lid portion is closed. [Means for solving the problem]

[0009] The present invention was created to solve the above problems, and firstly, it is a packaging box having an inner box part (A) and an outer box part (B), the inner box part and the outer box part each being formed from a sheet-like blank, the inner box part having a bottom surface part (50) and an inner sleeve-like part (1) that is erected from each side of the bottom surface and is approximately perpendicular to the bottom surface, an inner front part (10), an inner right side part (20), an inner left side part (30), and an inner back part (40), and when the inner box part is assembled into a box shape, the inner front part, inner right side part, inner left side part and inner back Of the four face sections of the part, there is an inner sleeve-shaped section where adjacent face sections are at approximately right angles to each other, a front upper flap (110) connected via a fold line from the upper edge of the inner front section and formed along the upper edge of the inner front section, an upper right flap (120) connected via a fold line from the upper edge of the inner right side section and formed along the upper edge of the inner right side section, a left upper flap (130) connected via a fold line from the upper edge of the inner left side section and formed along the upper edge of the inner left side section, and a section connected via a fold line from the upper edge of the inner back section and formed along the upper edge of the inner back section. The rear upper flap (140) is formed in such a way that at least three of the four upper flaps are provided, and all of the at least three upper flaps engage with at least one adjacent upper flap, and in the upper flaps that engage with each other, one upper flap is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other upper flap, and the other upper flap is provided with a second engaging portion (120P, 1) that engages with the first engaging portion of the first upper flap. 20Q, 130P, 130Q) are provided, and the outer box portion is an outer sleeve-shaped portion (201) provided along the outer surface of the inner box portion, having an outer front portion (210) formed along the outer surface of the inner front portion, an outer right side portion (220) formed along the outer surface of the inner right side portion, an outer left side portion (230) formed along the outer surface of the inner left side portion, and an outer back portion (240) formed along the outer surface of the inner back portion, and when the outer box portion is assembled into a box shape, the outer sleeve-shaped portion has adjacent side portions that are at approximately right angles to each other,The outer box has a lid portion (270, 280) connected to the upper end of the outer sleeve portion via a fold line, and on the outer right side portion, a part of the outer right side portion is formed as a right adhesive piece portion (222-1) and is separable from the outer right side portion main body portion (220-1), which is the area of ​​the outer right side portion other than the right adhesive piece portion, via a cut line, and the right adhesive piece portion is adhered to the inner right side portion, and on the outer left side portion, a part of the outer left side portion is formed as a left adhesive piece portion (232-1) and is separable from the outer left side portion main body portion (230-1), which is the area of ​​the outer left side portion other than the left adhesive piece portion, via a cut line, and the left adhesive piece portion is adhered to the inner left side portion, and in order to remove the outer box portion excluding the right adhesive piece portion and the left adhesive piece portion from the inner box portion, the cut line between the right adhesive piece portion and the outer right side portion main body portion is broken, and the cut line between the left adhesive piece portion and the outer left side portion main body portion is also broken.

[0010] According to the first configuration of the packaging box, at least three of the four top flaps are provided, and all top flaps engage with at least one adjacent top flap, so that at least three top flaps form a frame-shaped or U-shaped support section. Therefore, even if the upper inner box shifts laterally when the inner boxes are stacked, it is possible to prevent them from falling and to stack them stably. In addition, since the inner boxes only need to be placed on the frame-shaped or U-shaped support section, they can be easily stacked. Furthermore, each top flap is connected from the upper edge of the sleeve-shaped section and does not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed.

[0011] In addition, in the first configuration, an opening for removing the stored items may be provided on the inner front side.

[0012] Furthermore, in the first configuration, a first lid portion may be attached from the upper edge of the outer right side portion, and the cut line along the upper edge of the right adhesive piece portion may be formed along the boundary with the first lid portion, and a second lid portion may be attached from the upper edge of the outer left side portion, and the cut line along the upper edge of the left adhesive piece portion may be formed along the boundary with the second lid portion.

[0013] Secondly, in the first configuration described above, the upper end of the right adhesive piece is positioned above the upper edge of the inner right side surface, and the upper end of the left adhesive piece is positioned above the upper edge of the inner left side surface, with the right adhesive piece protruding upward from the upper edge of the inner right side surface and the left adhesive piece protruding upward from the upper edge of the inner left side surface. Therefore, the stacked inner boxes do not shift in the left-right direction.

[0014] Thirdly, in the first or second configuration described above, a pair of first cutting lines (221K, 222K) are formed at intervals from the upper front corner and the upper back corner of the outer right side portion toward the lower edge of the outer right side portion, and a pair of second cutting lines (231K, 232K) are formed at intervals from the upper front corner and the upper back corner of the outer left side portion toward the lower edge of the outer left side portion, and by pulling the lower end of the first central region, which is the area between the pair of first cutting lines, outward and breaking the first cutting lines, the cutting line between the right adhesive piece portion and the outer right side portion main body is broken, and by pulling the lower end of the second central region, which is the area between the pair of second cutting lines, outward and breaking the second cutting lines, the cutting line between the left adhesive piece portion and the outer left side portion main body is broken.

[0015] Furthermore, fourthly, a packaging box having an inner box portion (A') and an outer box portion (B'), where the inner box portion and the outer box portion are each formed from a sheet-like blank, and the inner box portion has a bottom portion (50) and an inner sleeve-like portion (1') that rises from each side of the bottom portion and is approximately perpendicular to the bottom portion, and has an inner front portion (10), an inner right side portion (20), an inner left side portion (30), and an inner back portion (40), and when the inner box portion is assembled into a box shape, of the four surfaces of the inner front portion, inner right side portion, inner left side portion and inner back portion, adjacent to each other An inner sleeve-shaped portion with a surface portion that forms a nearly right angle; a front upper flap (110) connected via a fold line from the upper edge of the inner front portion and formed along the upper edge of the inner front portion; an upper right flap (120) connected via a fold line from the upper edge of the inner right side portion and formed along the upper edge of the inner right side portion; a left upper flap (130) connected via a fold line from the upper edge of the inner left side portion and formed along the upper edge of the inner left side portion; and a rear upper flap connected via a fold line from the upper edge of the inner back portion and formed along the upper edge of the inner back portion. The top (140) has four top flaps, at least three of which are top flaps, and all of these at least three top flaps engage with at least one adjacent top flap, and one of the engaging top flaps is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other top flap, and the other top flap is provided with a second engaging portion (120P, 120Q, 130Q) that engages with the first engaging portion of the first top flap P, 130Q) are provided, and the outer box portion is an outer sleeve-shaped portion (201') provided along the outer surface of the inner box portion, having an outer front portion (210) formed along the outer surface of the inner front portion, an outer right side portion (220) formed along the outer surface of the inner right side portion, an outer left side portion (230) formed along the outer surface of the inner left side portion, and an outer rear portion (240) formed along the outer surface of the inner rear portion, and when the outer box portion is assembled into a box shape, the outer sleeve-shaped portion has adjacent side portions that are at approximately right angles to each other,The structure includes a lid portion (270, 280) connected via a fold line from the upper end of the outer sleeve-shaped portion, a first separation portion bonded to the outer right side portion, and a first rotating piece portion (228) which is a piece portion including the area on the outer right side portion to which the first separation portion is bonded, being formed to be rotatable with respect to the outer right side portion main body portion (229) which is the area on the outer right side portion other than the first rotating piece portion, and a second separation portion bonded to the outer left side portion, and a second rotating piece portion (23 8) is rotatably formed with respect to the outer left side body portion (239), which is the area of ​​the outer left side portion other than the second pivot piece portion, and by rotating the first pivot piece portion outward, the cut line between the first separation portion and the inner right side body portion is cut, and the first separation portion is separated from the inner box portion while being adhered to the first pivot piece portion, and by rotating the second pivot piece portion outward, the cut line between the second separation portion and the inner left side body portion is cut, and the second separation portion is separated from the inner box portion while being adhered to the second pivot piece portion.

[0016] According to the fourth configuration of the packaging box, at least three top flaps are provided on the four top flaps, and all top flaps engage with at least one adjacent top flap, so that at least three top flaps form a frame-shaped or U-shaped support section. Therefore, even if the upper inner box shifts laterally when the inner boxes are stacked, it is possible to prevent them from falling and to stack them stably. In addition, since the inner boxes only need to be placed on the frame-shaped or U-shaped support section, they can be easily stacked. Furthermore, each top flap is connected from the upper edge of the sleeve-shaped section and does not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed.

[0017] In addition, in the fourth configuration, an opening for removing the stored items may be provided on the inner front side.

[0018] Furthermore, in the fourth configuration, the first lid portion may be attached from the upper edge of the outer right side portion, and the cut line along the upper edge of the right adhesive piece portion may be formed along the boundary with the first lid portion, and the second lid portion may be attached from the upper edge of the outer left side portion, and the cut line along the upper edge of the left adhesive piece portion may be formed along the boundary with the second lid portion.

[0019] Furthermore, in the first and fourth configurations described above, the four upper flaps consist of a front upper flap (110) connected via a fold line from the upper edge of the inner front portion and formed along the upper edge of the inner front portion, a right upper flap (120) connected via a fold line from the upper edge of the inner right side portion and formed along the upper edge of the inner right side portion, a left upper flap (130) connected via a fold line from the upper edge of the inner left side portion and formed along the upper edge of the inner left side portion, and a rear upper flap (140) connected via a fold line from the upper edge of the inner rear portion and formed along the upper edge of the inner rear portion. At least three upper flaps are provided, and all of the at least three upper flaps engage with at least one adjacent upper flap, and one of the upper flaps that engage with each other is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other upper flap, and the other upper flap is provided with a second engaging portion (120P, 120Q, 130P, 130Q) that engages with the first engaging portion of the first upper flap, and the portion of "is connected from the upper edge of the inner front part via a fold line, inside It has a front upper flap (110) formed along the upper edge of the front part, a rear upper flap (140) connected via a fold line from the upper edge of the inner rear part and formed along the upper edge of the inner rear part, and a right upper flap (120) connected via a fold line from the upper edge of the inner right side part and formed along the upper edge of the inner right side part, and a left upper flap (130) connected via a fold line from the upper edge of the inner left side part and formed along the upper edge of the inner left side part, and each of the upper surfaces of the left upper flap, right upper flap and left upper flap The flap engages with at least one upper flap in an adjacent upper flap, and one upper flap in the upper flaps that engage with each other is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other upper flap, and the other upper flap is provided with a second engaging portion (120P, 120Q, 130P, 130Q) that engages with the first engaging portion of the first upper flap, and also, "a front upper flap (110) is connected from the upper edge of the inner front portion via a fold line and formed along the upper edge of the inner front portion,"It has a front top flap, Each upper flap of the upper flap engages with at least one upper flap in an adjacent upper flap, and one upper flap of the upper flaps that engage with each other is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other upper flap, and the other upper flap is provided with a second engaging portion (120P, 120Q, 130P, 130Q) that engages with the first engaging portion of the upper flap.

[0020] Furthermore, in the fifth configuration, four upper flaps are provided: a front upper flap (110), a right upper flap (120), a left upper flap (130), and a rear upper flap (140). Each of the front upper flap, rear upper flap, right upper flap, and left upper flap engages with two adjacent upper flaps. The front upper flap has a first engaging portion (110P) for engaging with the left upper flap and a first engaging portion (110Q) for engaging with the right upper flap. The rear upper flap has a first engaging portion (140P) for engaging with the left upper flap and a first engaging portion (140Q) for engaging with the right upper flap. The right upper flap has a second engaging portion (120P) for engaging with the first engaging portion of the front upper flap and a first engaging portion of the rear upper flap. The left upper flap has a second engaging portion (120Q) for engaging with the joint portion, and the left upper flap has a second engaging portion (130P) for engaging with the first engaging portion of the front upper flap and a second engaging portion (130Q) for engaging with the first engaging portion of the rear upper flap. The inner box portion, in which the outer box portion excluding the right and left adhesive pieces has been removed, is characterized in that the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are formed in a frame shape with the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are bent inward relative to the sleeve-shaped portion by engaging the first engaging portion of the front upper flap with the second engaging portion of the left upper flap, the first engaging portion of the rear upper flap with the second engaging portion of the left upper flap, and the first engaging portion of the rear upper flap with the second engaging portion of the right upper flap.

[0021] In the fifth configuration of the packaging box, each of the top flaps—the front top flap, the rear top flap, the upper right top flap, and the left top flap—engages with two adjacent top flaps. As a result, the four top flaps form a frame-like structure when folded inward relative to the sleeve-like portion, thus forming a frame-shaped mounting section. Furthermore, since each top flap engages with all adjacent top flaps, the folded state of the four top flaps relative to the sleeve-like portion can be sufficiently maintained.

[0022] Furthermore, the fifth configuration described above may be as follows: In any of the first to fourth configurations described above, four upper flaps are provided: a front upper flap (110), a right upper flap (120), a left upper flap (130), and a rear upper flap (140). The front upper flap has a front left first engaging portion (110P) which is a first engaging portion for engaging with the left upper flap, and a front right first engaging portion (110Q) which is a first engaging portion for engaging with the right upper flap. The rear upper flap has a rear left first engaging portion (140P) which is a first engaging portion for engaging with the left upper flap, and a rear right first engaging portion (140Q) which is a first engaging portion for engaging with the right upper flap. The right upper flap has a right front second engaging portion (120P) which is a first engaging portion for engaging with the front right first engaging portion of the front upper flap, and the rear upper flap The front upper flap has a right rear second engaging portion (120Q) for engaging with the rear right first engaging portion, and the left upper flap has a left front second engaging portion (130P) for engaging with the front left first engaging portion of the front upper flap, and a left rear second engaging portion (130Q) for engaging with the rear left first engaging portion of the rear upper flap, and in the inner box portion from which the outer box portion excluding the right adhesive piece portion and the left adhesive piece portion has been removed, the front left first engaging portion and the left front second engaging portion are engaged, the front right first engaging portion and the right front second engaging portion are engaged, the rear left first engaging portion and the left rear second engaging portion are engaged, and the rear right first engaging portion and the right rear second engaging portion are engaged, thereby forming a frame shape in which the front upper flap, the upper right flap, the left upper flap, and the rear upper flap are bent inward relative to the sleeve-shaped portion.

[0023] Furthermore, in the fifth configuration described above, the front upper flap is provided with a front left engaging portion (110P) as a first engaging portion for engaging with the left upper flap, located in the end region on the left side of the front upper flap, and a front right engaging portion (110Q) as a first engaging portion for engaging with the right upper flap is provided in the end region on the right side of the front upper flap. In the rear upper flap, a rear left engaging portion (140P) is provided in the left side end region of the rear upper flap as a first engaging portion for engaging with the left upper flap, and a rear right engaging portion (140Q) is provided in the right side end region of the rear upper flap as a first engaging portion for engaging with the right upper flap, and in the right upper flap, a right front engaging portion (120P) is provided in the front end region of the right upper flap as a second engaging portion for engaging with the first engaging portion of the front upper flap, and the rear upper A right rear engaging portion (120Q), which serves as a second engaging portion for engaging with the first engaging portion of the surface flap, is provided in the rear end region of the upper right surface flap. In the left upper surface flap, a left front engaging portion (130P), which serves as a second engaging portion for engaging with the first engaging portion of the front upper surface flap, is provided in the front end region of the left upper surface flap, and a left rear engaging portion (130Q), which serves as a second engaging portion for engaging with the first engaging portion of the rear upper surface flap, is provided in the rear end region of the left upper surface flap.

[0024] Seventhly, in the sixth configuration described above, in a pair of engaging portions including a first engaging portion and a second engaging portion that engage with each other, when one engaging portion of the pair of engaging portions is defined as the first engaging portion (A engaging portion) and the other engaging portion is defined as the second engaging portion (B engaging portion), the first engaging portion (A engaging portion) is connected via a fold line (C15, C16, C17, C18) to a first inclined side where the distance from the fold line to the second engaging portion (B engaging portion) side becomes shorter as it goes from the fold line between the sleeve-like portion, and includes a first protruding portion (124-1, 124-2, 134-1, 134-2) protruding from the first inclined side, and a second protruding portion (126-1, 126-2, 136-1, 136-2) protruding from the extension line of the first inclined side and adjacent to the first protruding portion via a notch portion (121K, 122K, 131K, 132K). The first protruding portion is provided at an end position on the second engaging portion (B engaging portion) side rather than the second protruding portion on the upper surface flap. The second engaging portion (B engaging portion) has a second inclined side (112b, 112c, 142b, 142c) where the distance from the fold line to the first engaging portion (A engaging portion) side becomes shorter as it goes from the fold line between the sleeve-like portion. When the first engaging portion (A engaging portion) is placed on top of the second engaging portion (B engaging portion), the second protruding portion overlaps with a region (110-2, 110-4, 140-2, 140-4) along the second inclined side, and the first protruding portion overlaps with an end portion of the upper surface flap where the second engaging portion (B engaging portion) is provided. By pushing in the second protruding portion in a state where the first engaging portion (A engaging portion) is placed on top of the second engaging portion (B engaging portion), the fold line at the base end of the first protruding portion becomes a valley fold, and the second protruding portion is positioned below the region along the second inclined side, whereby the first engaging portion (A engaging portion) and the second engaging portion (B engaging portion) are engaged with each other.

[0025] Therefore, by pushing in the second protruding portion in a state where the first engaging portion is placed on top of the second engaging portion, the fold line at the base end of the first protruding portion becomes a valley fold, and the second protruding portion is positioned below the region along the second inclined side, so that the first engaging portion and the second engaging portion can be easily engaged with each other.

[0026] Also, eighthly, in any of the configurations from the first to the fourth above, four upper surface flaps, namely, a front upper surface flap (110), a right upper surface flap (120), a left upper surface flap (130), and a rear upper surface flap (140) are provided. The front upper surface flap engages only with one of the right upper surface flap and the left upper surface flap, and the rear upper surface flap engages only with the other of the right upper surface flap and the left upper surface flap. The front upper surface flap has first engaging portions (110P, 110Q) for engaging with one of the right upper surface flap and the left upper surface flap. One of the right upper surface flap and the left upper surface flap has second engaging portions (130P, 120P) for engaging with the first engaging portions of the front upper surface flap. The rear upper surface flap has first engaging portions (140Q, 140P) for engaging with the other of the right upper surface flap and the left upper surface flap. The other of the right upper surface flap and the left upper surface flap has second engaging portions (120Q, 130Q) for engaging with the first engaging portions of the rear upper surface flap. In the inner box portion from which the outer box portion excluding the right adhesive piece portion and the left adhesive piece portion is removed, by engaging the second engaging portion in one of the right upper surface flap and the left upper surface flap with the first engaging portion of the front upper surface flap, and engaging the second engaging portion in the other of the right upper surface flap and the left upper surface flap with the first engaging portion of the rear upper surface flap, the front upper surface flap, the right upper surface flap, the left upper surface flap, and the rear upper surface flap are formed in a frame shape in a state of being bent inward with respect to the sleeve-shaped portion.

[0027] According to the packaging box of the eighth configuration, since the front upper surface flap engages only with one of the right upper surface flap and the left upper surface flap, and the rear upper surface flap engages only with the other of the right upper surface flap and the left upper surface flap, the four upper surface flaps form a frame shape in a state of being bent inward with respect to the sleeve-shaped portion, and a frame-shaped placement portion can be formed.

[0028] Furthermore, the eighth configuration described above may be as follows: In any of the first to fourth configurations described above, four upper flaps are provided: a front upper flap (110), a right upper flap (120), a left upper flap (130), and a rear upper flap (140). The front upper flap engages with only one of the right upper flap and the left upper flap, and the rear upper flap engages with only the other of the right upper flap and the left upper flap. The front upper flap has a front first engaging portion (110P) which is a first engaging portion for engaging with one of the right upper flap and the left upper flap, and one of the right upper flap and the left upper flap has a second engaging portion (130P) for engaging with the front first engaging portion of the front upper flap, and the rear upper flap has a front first engaging portion (110P) which is a first engaging portion for engaging with one of the right upper flap and the left upper flap. The front upper flap, the front upper flap, the front upper flap, and the rear upper flap are formed in a frame shape with the front upper flap, the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are formed in a frame shape with the front upper flap, the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are formed in a frame shape with the front upper flap, the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are formed in a frame shape with the sleeve-shaped portion folded inward. [Effects of the Invention]

[0029] According to the packaging box of the present invention, at least three of the four top flaps are provided, and all top flaps engage with at least one adjacent top flap, so that at least three top flaps form a frame-shaped or U-shaped mounting portion. Therefore, even if the upper inner box shifts laterally when the inner boxes are stacked, it is possible to prevent them from falling and to stack them stably. Furthermore, since the inner boxes only need to be placed on the frame-shaped or U-shaped mounting portion, they can be easily stacked. In addition, each top flap is connected from the upper edge of the sleeve-shaped portion and does not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed. [Brief explanation of the drawing]

[0030] [Figure 1] This is a front perspective view of the packaging box. [Figure 2] This is a rear perspective view of the packaging box. [Figure 3] This is a bottom view of the packaging box. [Figure 4] This is a front perspective view showing the inner box portion of a packaging box. [Figure 5] This is a rear perspective view showing the inner box portion of a packaging box. [Figure 6] This is an unfolded view of the inner box portion of a packaging box. [Figure 7] Figure 6 is an explanatory diagram of the main parts. [Figure 8] Figure 6 is an explanatory diagram of the main parts. [Figure 9] This is an enlarged view of the main part of Figure 6. [Figure 10] This is an enlarged view of the main part of Figure 6. [Figure 11] This is an unfolded view of the outer box portion of a packaging box. [Figure 12] Figure 11 is an explanatory diagram of the main parts. [Figure 13] Figure 11 is an explanatory diagram of the main parts. [Figure 14] This is an explanatory diagram showing the manufacturing process of packaging boxes. [Figure 15] This is an explanatory diagram showing the manufacturing process of packaging boxes. [Figure 16] This is an explanatory diagram showing the manufacturing process of packaging boxes. [Figure 17] This is an explanatory diagram showing the manufacturing process of packaging boxes. [Figure 18] This is a perspective view showing the packaging box in use. [Figure 19] This is a perspective view showing the packaging box in use. [Figure 20] This is a perspective view showing the packaging box in use. [Figure 21] This is a perspective view showing the packaging box in use. [Figure 22] This is a plan view of the main part illustrating the method of engaging the upper flap. [Figure 23] This is a plan view of the main part illustrating the method of engaging the upper flap. [Figure 24] This is a perspective view showing the packaging box in use. [Figure 25] This is a perspective view showing the packaging box in use. [Figure 26] This is a perspective view showing the packaging box in use. [Figure 27] This is a front perspective view showing another example of the inner box portion of a packaging box. [Figure 28] This is an exploded view showing another example of the inner box portion of a packaging box. [Figure 29] This is a perspective view showing the usage of a packaging box using the inner box portion of another example. [Figure 30] This is an exploded view showing another example of the inner box portion of a packaging box. [Figure 31] This is an exploded view showing another example of the outer box portion of a packaging box. [Figure 32] These are diagrams illustrating the main parts of an example of an upper flap, where (a) shows an example with four upper flaps, having a left front engagement pair F1, a right front engagement pair F2, a left rear engagement pair F3, and a right rear engagement pair F4; (b) shows an example with three upper flaps, having a left front engagement pair F1 and a right front engagement pair F2; (c) shows an example with three upper flaps, having a right front engagement pair F2 and a right rear engagement pair F4; and (d) shows an example with four upper flaps, having a left front engagement pair F1 and a right rear engagement pair F4. [Figure 33] This is an explanatory diagram showing another example of an engaging pair, where (a) shows the state before engagement and (b) shows the state after engagement. [Modes for carrying out the invention]

[0031] In the present invention, the objective of providing a packaging box that has a bottom portion, an inner box portion having an inner sleeve-like portion, and an outer box portion covering the inner box portion, the outer box portion having an outer sleeve-like portion and a lid portion, and that allows products stored in the inner box portion to be displayed by removing the outer box portion, is to provide a packaging box in which the inner boxes can be easily stacked, prevents the inner boxes from falling even if the upper inner box portion shifts in the left-right direction, and does not narrow the storage space of the inner box portion when the lid portion is closed, is achieved as follows.

[0032] The packaging box P according to the present invention is configured as shown in Figures 1 to 13, and has an inner box A and an outer box B, each of which is formed from a single sheet-like blank (specifically corrugated cardboard (especially double-sided corrugated cardboard), but cardboard or the like may also be used).

[0033] The inner box section A is a container-like structure with an open top overall, and as shown in Figures 1 to 10, it has a sleeve-shaped section (inner sleeve-shaped section) 1 and a bottom section 50. In the assembled state, the sleeve-shaped section 1 is formed by standing upright around the bottom section 50 and has a front section (inner front section) 10, a side section (inner right side section) 20, a side section (inner left side section) 30, a back section (inner back section) 40, an adhesive tab 49, and top flaps 110, 120, 130, and 140. Its unfolded state is formed as shown in Figures 6 to 8.

[0034] Here, the front section 10 has a roughly rectangular shape with a notch formed at the top, and is concave overall. Specifically, a notch K11 is formed at the top of the front section 10, and the notch K11 is connected from the upper edge of the right side of the front section 10 and has a straight edge 12a perpendicular to the lower edge of the front section 10, a straight edge 12b parallel to the lower edge of the front section 10, and a straight edge 12c parallel to edge 12a, with a radius formed between edge 12a and edge 12b, and between edge 12b and edge 12c. Edge 12c is connected from the upper edge of the left side of the front section 10. As will be described later, a notch K12 is also formed in the upper flap 110 which is connected from the upper edge of the front section 10 via a folded line, and the opening K1 is formed by the notch K11 and the notch K12. In other words, the opening K1 is formed in the region consisting of the front portion 10 and the top flap 110. Note that the lower and upper edges of the front portion 10 are parallel to each other. Furthermore, although it has been stated that the opening K1 is formed in the region consisting of the front portion 10 and the top flap 110, the opening may also be formed in the front portion 10.

[0035] Furthermore, the side section 20 is connected to the right side end of the front section 10 via a bent line C2, and the overall shape is roughly rectangular.

[0036] Furthermore, the side section 30 is connected to the left side end of the front section 10 via a folded line C1 and has a roughly rectangular shape. The lateral length of the side section 30 is the same as the lateral length of the side section 20, and the length between folded lines C0 and C1 is the same as the length between folded lines C2 and C3. A vertically elongated strip-shaped opening K2 is provided at the boundary between the front section 10 and the side section 30 for fitting the connecting piece 250 of the outer box section B. In other words, the opening K2 is provided along the extension of the folded line C1.

[0037] Furthermore, the rear section 40 is connected to the rear end of the side section 20 via a bent line C3 and has a roughly rectangular shape. The lateral length of the rear section 40 is approximately the same as the lateral length of the front section 10, and the length between bent lines C1 and C2 is approximately the same as the length between bent line C3 and the side section 40a.

[0038] Furthermore, the adhesive margin 49 is connected to the rear end of the side portion 30 via a fold line C0 and has a long, narrow, trapezoidal shape in the vertical direction. The outer surface of this adhesive margin 49 is adhered to the inner surface of the left side end region of the rear portion 40.

[0039] In the unfolded state of the inner box section A, the lower edge of the front section 10 (the lower edge of the front section body 12), the lower edge of the side section 20, the lower edge of the side section 30, and the lower edge of the back section 40 are formed on the same straight line, and these lower edges constitute the lower edge of the sleeve-shaped section 1.

[0040] Furthermore, in the unfolded state of the inner box portion A, the fold lines C11, C12, C13, and C14 are formed on the same straight line and are parallel to the lower edge of the sleeve-shaped portion 1.

[0041] Furthermore, the folded lines C0 to C3 in the inner box portion A are formed parallel to each other and perpendicular to the lower edge of the sleeve-shaped portion 1.

[0042] Furthermore, the bottom portion 50 is a so-called one-touch bottom, and has a first piece (first bottom portion) 60, a second piece (second bottom portion) 70, a third piece (third bottom portion) 80, and a fourth piece (fourth bottom portion) 90, and in the assembled state of the packaging box P, it has a roughly rectangular shape as shown in Figure 3.

[0043] Here, the first piece 60 is connected to the lower end of the front section 10 via a fold line and is formed in a roughly trapezoidal shape that narrows towards the front, with a part of its upper surface forming a part of the inner bottom surface of the inner box section A. In the assembled state of the bottom section 50, this first piece 60 is formed in a roughly point-symmetric manner with respect to the center position of the fourth piece 90 and the bottom section 50 (the intersection of two straight lines connecting the diagonal corners of the bottom section 50).

[0044] Furthermore, the second piece 70 is connected to the lower end of the side portion 20 via a fold line and is formed in a roughly rectangular shape, with a part of the upper surface of the second piece 70 forming a part of the inner bottom surface of the inner box portion A. Also, a fold line 70-1 (this fold line 70-1 is a mountain fold on the upper side) is formed diagonally from the corner of the second piece 70 (the lower end of the boundary between the side portion 20 and the back portion 40) relative to the edge that forms the boundary between the second piece 70 and the side portion 20, so that the inner box portion A can be easily folded. The second piece 70 is divided into a main body portion 72 and a tip portion 74 via the fold line 70-1. A notch 72a is formed on the tip portion 74 side of the tip of the main body portion 72 so as to lock with the other main body portion 82. The upper surface of the tip portion 74 is glued to the lower surface of the fourth piece 90.

[0045] Furthermore, the third piece 80 is connected to the lower end of the side portion 30 via a fold line, and in the assembled state of the bottom portion 50, it is formed point-symmetrically with respect to the center position of the second piece 70 and the bottom portion 50. That is, the third piece 80 is connected to the lower end of the side portion 30 via a fold line and is formed in a substantially rectangular shape, with a part of the upper surface of the third piece 80 forming a part of the inner bottom surface of the inner box portion A. In addition, a fold line 80-1 (this fold line 80-1 has a mountain fold on the upper side) is formed diagonally from the corner of the third piece 80 (the lower end of the boundary position between the front portion 10 and the side portion 30) relative to the edge that forms the boundary between the third piece 80 and the side portion 30, so that the inner box portion A can be easily folded. The third piece 80 is divided into a main body portion 82 and a tip portion 84 via the fold line 80-1. A notch 82a is formed on the tip end 84 side of the main body portion 82 so as to interlock with the other main body portion 72. The upper surface of the tip end 84 is bonded to the lower surface of the first piece portion 60.

[0046] Furthermore, the fourth piece 90 is connected to the lower end of the back portion 40 via a fold line and is formed in a roughly trapezoidal shape that becomes narrower towards the front, with a part of its upper surface forming a part of the inner bottom surface of the inner box portion A.

[0047] As described above, in the bottom portion 50, the tip portion (first end region) 84, which is the other side portion of one of the two adjacent pieces (first piece 60 and third piece 80) of the bottom portion first piece pair, is bendable via a fold line, and the tip portion 84 is bonded to the first piece 60. The tip portion (second end region) 74, which is the other side portion of one of the other two adjacent pieces (second piece 70 and fourth piece 90) of the bottom portion second piece pair, is bendable via a fold line, and the tip portion 74 is bonded to the fourth piece 90.

[0048] Next, the top flap 110 is connected to the upper edge of the front portion 10 (the upper edges on both the left and right sides of the notch K11) via the folded line C11, and the top flap 110 is formed in a strip shape along the folded line C11 (and its extension).

[0049] In other words, the upper flap 110 has a roughly trapezoidal upper flap body 112 and protruding portions 114-1 and 114-2 that project from the left and right ends of the upper flap body 112 toward the side opposite to the front portion 10.

[0050] The upper flap body 112 has a straight edge portion 112a parallel to the fold line C11, and inclined edges (second inclined edges) 112b and 112c formed on both sides of the edge portion 112a, with protruding portions 114-1 and 114-2 provided on the outside of the extensions of the inclined edges 112b and 112c. Specifically, protruding portion 114-1 is formed protruding from the left side end portion 110-1 of the upper flap body 112, and protruding portion 114-2 is formed protruding from the right side end portion 110-3 of the upper flap body 112. The protruding portions 114-1 and 114-2 protrude in a direction perpendicular to the direction of the fold line C11.

[0051] Since the protruding portion 114-1 and the protruding portion 114-2 are symmetrical in shape, the protruding portion 114-2 will be explained as an example. As shown in Figure 10, the protruding portion 114-2 has a straight edge portion r perpendicular to the direction of the broken line C11, and a substantially inverted U-shaped edge portion s provided between edge portion r and the inclined edge portion 112c.

[0052] The inclined edges 112b and 112c are inclined so that they become closer to the front portion 10 as they move towards the left and right ends of the upper flap body 112.

[0053] The end portion 110-3 and the projection 114-2, along with the region 110-4 along the inclined edge 112c, engage with the first projection 124-1 and the second projection 126-1 of the upper flap 120 adjacent to the upper flap 110. Specifically, the first projection 124-1 engages with the end portion 110-3 and the projection 114-2 (mainly the end portion 110-3), and the region 110-4 along the inclined edge 112c engages with the second projection 126-1 by overlapping with it.

[0054] Similarly, the end portion 110-1 and the projection 114-1, and the region 110-2 along the inclined edge 112b engage with the first projection 134-2 and the second projection 136-2 of the upper flap 130 adjacent to the upper flap 110. Specifically, the first projection 134-2 engages with the end portion 110-1 and the projection 114-1 (mainly the end portion 110-1), and the region 110-2 along the inclined edge 112b engages with the second projection 136-2 by overlapping with it.

[0055] In other words, the end portion 110-1 and projection 114-1 (mainly the end portion 110-1) and region 110-2 provided on the left side end region of the upper flap 110 engage with the first projection 134-2 and second projection 136-2 provided on the front end region of the upper flap 130, and the end portion 110-3 and projection 114-2 (mainly the end portion 110-3) and region 110-4 provided on the right side end region of the upper flap 110 engage with the first projection 124-1 and second projection 126-1 provided on the front end region of the upper flap 120.

[0056] Specifically, as shown in Figure 23, the end portion 110-1 and region 110-2 provided in the left side end region of the upper flap 110 constitute the front left engaging portion (second engaging portion) 110P, and the end portion 110-3 and region 110-4 provided in the right side end region of the upper flap 110 constitute the front right engaging portion (second engaging portion) 110Q. In addition, the first protrusion 134-2 and the second protrusion 136-2 provided in the front end region of the upper flap 130 constitute the left front engaging portion (first engaging portion) 130P, and the first protrusion 124-1 and the second protrusion 126-1 provided in the front end region of the upper flap 120 constitute the right front engaging portion (first engaging portion) 120P.

[0057] Then, the front left engaging portion 110P and the left front engaging portion 130P constitute the left front engaging portion pair F1, and the front right engaging portion 110Q and the right front engaging portion 120P constitute the right front engaging portion pair F2 (see Figure 23). Furthermore, if the shape of the first engaging portion is designated as the A engaging portion and the shape of the second engaging portion is designated as the B engaging portion, then the left front engaging portion 130P and the right front engaging portion 120P become the A engaging portion, and the front left engaging portion 110P and the front right engaging portion 110Q become the B engaging portion.

[0058] Furthermore, a notch K12 is formed in the area of ​​the upper flap 110 on the front portion 10 side, and the notch K12 is formed by a straight edge 112d parallel to the edge 12b, a radius provided between the right side end of the edge 112d and the edge 12a, and a radius provided between the left side end of the edge 112d and the edge 12c.

[0059] The opening K1, consisting of notches K11 and K12, allows the contents stored in the inner box A to be viewed and removed through this opening K1. In particular, even when the inner boxes A are stacked, the contents can be viewed and removed from the lower inner box A.

[0060] Furthermore, the top flap 120 is connected to the upper surface of the side portion 20 via a folded line C12, and the top flap 120 is formed in a strip shape along the upper edge of the side portion 20.

[0061] In other words, the top flap 120 has a roughly trapezoidal top flap body 122, first protruding portions 124-1 and 124-2 that project diagonally outward from the front and rear ends of the top flap body 122 (left and right sides in the deployed state shown in Figure 6) via fold lines C15 and C16, and second protruding portions 126-1 and 126-2 that are provided adjacent to the inside of the first protruding portions 124-1 and 124-2 and project diagonally outward relative to the top flap body 122.

[0062] The broken line C15 is inclined such that the distance from the broken line C12 between it and the sleeve-shaped portion 1 decreases as it approaches the end portion 110-3 and region 110-4 (second engagement portion) of the upper flap 110. The edges along the broken line C15 become the first inclined edges. Similarly, the broken line C16 is inclined such that the distance from the broken line C12 between it and the sleeve-shaped portion 1 decreases as it approaches the end portion 140-1 and region 140-2 (second engagement portion) of the upper flap 140. The edges along the broken line C16 become the first inclined edges.

[0063] The top flap body 122 has a side portion 122a that is substantially parallel to the upper edge of the side portion 20, a side portion 122b that follows the fold line C15, and a side portion 122c that follows the fold line C16. The shape of the top flap body 122 itself is enclosed by side portion 122a, side portion 122b and its extension, and side portion 122c and its extension. In side portion 122a, a horizontally elongated notch portion 123K is formed in the center, and both sides of the notch portion 123K are formed in straight lines parallel to the upper edge of the side portion 20. The fold lines C15 and C16 are at a 45-degree angle (or approximately 45 degrees) with respect to the upper edge of the side portion 20.

[0064] Furthermore, since the first protruding portion 124-1 and the first protruding portion 124-2 have symmetrical shapes, the first protruding portion 124-1 will be explained as an example. As shown in Figure 9, the first protruding portion 124-1 has a trapezoidal shape and is connected from the front end of the folded line C15 (the left end in the unfolded state of Figures 8 and 9) and has a straight edge portion t that is perpendicular to the direction of the upper edge of the side portion 20, connected from the rear end of the folded line C15 (the right end in the unfolded state of Figures 8 and 9) and has a straight edge portion u that is parallel to the upper edge of the side portion 20, and has a straight edge portion v that is formed between the end of edge portion t and the end of edge portion u and is substantially parallel to the folded line C15.

[0065] Furthermore, since the second projection 126-1 and the second projection 126-2 are symmetrical in shape, the second projection 126-1 will be explained as an example. As shown in Figure 9, the second projection 126-1 has a roughly trapezoidal shape and is connected from the rear end of the fold line C15 (the right end in the unfolded state shown in Figures 8 and 9). It has a side portion w that forms an acute angle with respect to the side portion u, and a roughly arc-shaped side portion x formed between the tip of the side portion w and the front end of the side portion 122a of the upper flap body 122 (the left end in the unfolded state shown in Figures 8 and 9). Thus, the first projection 124-1 protrudes diagonally outward via the fold line C15, and the second projection 126-1 protrudes diagonally outward relative to the upper flap body 122.

[0066] The first projection 124-1 and the second projection 126-1 are formed as described above, and a notch 121K is formed between the first projection 124-1 and the second projection 126-1. In other words, the second projection 126-1 is adjacent to the first projection 124-1 via the notch 121K, and the first projection 124-1 is located on the end side of the upper flap 120 (the end side of the end portion 110-3 and region 110-4 (i.e., the end side of the second engagement portion)) of the upper flap 120, in the direction along the fold line C12 between the sleeve-shaped portion 1 of the upper flap 120 and the second projection 126-1. In other words, the first projection 124-1 is located at the end position on the upper flap 120 that is on the second engagement portion side of the second projection 126-1.

[0067] Similarly, a notch 122K is formed between the first projection 124-2 and the second projection 126-2. In other words, the second projection 126-2 is adjacent to the first projection 124-2 via the notch 122K, and the first projection 124-2 is located on the end side of the upper flap 120 (the end side of the end portion 140-1 and region 140-2 (i.e., the end side of the second engagement portion)) of the upper flap 120, in the direction along the fold line C12 between the upper flap 120 and the sleeve-shaped portion 1, compared to the second projection 126-2. In other words, the first projection 124-2 is located at the end position on the upper flap 120 that is on the second engagement portion side compared to the second projection 126-2.

[0068] Furthermore, the top flap 130 is connected to the upper surface of the side portion 30 via a folded line C13, and the top flap 130 is formed in a strip shape along the upper edge of the side portion 30. This top flap 130 is formed symmetrically with the top flap 120.

[0069] In other words, the top flap 130 has a roughly trapezoidal top flap body 132, first protruding portions 134-1 and 134-2 that project diagonally outward from the front and rear ends (left and right sides in the deployed state shown in Figure 7) of the top flap body 132 via fold lines C17 and C18, and second protruding portions 136-1 and 136-2 that are provided adjacent to the inside of the first protruding portions 134-1 and 134-2 and project diagonally outward relative to the top flap body 132.

[0070] The broken line C17 is inclined such that the distance from the broken line C13 between it and the sleeve-shaped portion 1 decreases as it approaches the end portion 140-3 and region 140-4 (second engagement portion). The edges along the broken line C17 become the first inclined edges. Similarly, the broken line C18 is inclined such that the distance from the broken line C13 between it and the sleeve-shaped portion 1 decreases as it approaches the end portion 110-1 and region 110-2 (second engagement portion). The edges along the broken line C18 become the first inclined edges.

[0071] In other words, the top flap body 132 has a side portion 132a that is substantially parallel to the upper edge of the side portion 30, a side portion 132b that follows the fold line C17, and a side portion 132c that follows the fold line C18. The shape of the top flap body 132 itself is enclosed by the side portion 132a, the side portion 132b and its extension, and the side portion 132c and its extension. In the side portion 132a, a horizontally elongated notch 133K is formed in the center, and both sides of the notch 133K are formed in straight lines parallel to the upper edge of the side portion 30. The fold lines C17 and C18 are at a 45-degree angle (or approximately 45 degrees) with respect to the upper edge of the side portion 30.

[0072] Furthermore, since the first protrusion 134-1 and the first protrusion 134-2 are symmetrical in shape, the first protrusion 134-1 will be explained as an example. As shown in Figure 9, the first protrusion 134-1 has a trapezoidal shape and is connected from the rear end of the folded line C17 (the left end in the unfolded state of Figure 7) and has a straight edge t that is perpendicular to the direction of the upper edge of the side surface 30, connected from the front end of the folded line C17 (the right end in the unfolded state of Figure 7) and has a straight edge u that is parallel to the upper edge of the side surface 30, and has a straight edge v that is formed between the end of edge t and the end of edge u and is substantially parallel to the folded line C17.

[0073] Furthermore, since the second projection 136-1 and the second projection 136-2 are symmetrical in shape, the second projection 136-1 will be explained as an example. As shown in Figure 9, the second projection 136-1 has a roughly trapezoidal shape and is connected to the front end of the fold line C17 (the right end in the unfolded state in Figure 7). It has a side portion w that forms an acute angle with respect to the side portion u, and a roughly arc-shaped side portion x formed between the tip of the side portion w and the rear end of the side portion 132a of the upper flap body 132 (the left end in the unfolded state in Figure 7). Thus, the first projection 134-1 protrudes diagonally outward via the fold line C17, and the second projection 136-1 protrudes diagonally outward relative to the upper flap body 132.

[0074] The first projection 134-1 and the second projection 136-1 are formed as described above, and a notch 131K is formed between the first projection 134-1 and the second projection 136-1. In other words, the second projection 136-1 is adjacent to the first projection 134-1 via the notch 131K, and the first projection 134-1 is located on the end side of the upper flap 130 (the end side of the end portion 140-3 and region 140-4 (i.e., the end side of the second engagement portion)) of the upper flap 130, in the direction along the fold line C13 between the sleeve-shaped portion 1 of the upper flap 130 and the second projection 1, compared to the second projection 136-1. In other words, the first projection 134-1 is located at the end position on the upper flap 130 that is on the second engagement portion side compared to the second projection 136-1.

[0075] Similarly, a notch 132K is formed between the first projection 134-2 and the second projection 136-2. In other words, the second projection 136-2 is adjacent to the first projection 134-2 via the notch 132K, and the first projection 134-2 is located on the end side of the upper flap 130 (the end side of the end portion 110-1 and region 110-2 (i.e., the end side of the second engagement portion)) of the upper flap 130, in the direction along the fold line C13 between the sleeve-shaped portion 1 of the upper flap 130 and the first projection 136-2. In other words, the first projection 134-2 is located at the end position on the upper flap 130 that is on the second engagement portion side of the second projection 136-2.

[0076] Next, the top flap 140 is connected to the upper edge of the rear portion 40 via a fold line C14, and the top flap 140 is formed in a strip shape along the upper edge of the rear portion 40. This top flap 140 is formed symmetrically to the top flap 110, except that it does not have a notch K12.

[0077] In other words, the top flap 140 has a roughly trapezoidal top flap body 142 and protruding portions 144-1 and 144-2 that project from the left and right ends of the top flap body 142 toward the opposite side from the rear portion 40.

[0078] The upper flap body 142 has a straight edge portion 142a parallel to the fold line C14, and inclined edges (second inclined edges) 142b and 142c formed on both sides of the edge portion 142a, with protruding portions 144-1 and 144-2 provided on the outside of the extensions of the inclined edges 142b and 142c. Specifically, protruding portion 144-1 is formed protruding from the right side end portion 140-1 of the upper flap body 142, and protruding portion 144-2 is formed protruding from the left side end portion 140-3 of the upper flap body 142. The protruding portions 144-1 and 144-2 protrude in a direction perpendicular to the direction of the fold line C14.

[0079] Since the protruding portion 144-1 and the protruding portion 144-2 are symmetrical in shape, the protruding portion 144-2 will be explained using the protruding portion 144-2 as an example. As shown in Figure 10, the protruding portion 144-2 has a straight edge portion r perpendicular to the direction of the broken line C14, and a substantially inverted U-shaped edge portion s provided between edge portion r and the inclined edge portion 142c.

[0080] The inclined edges 142b and 142c are sloped such that they become closer to the back surface 40 as they move towards the left and right ends of the upper flap body 142.

[0081] The end portion 140-3 and the projection 144-2, along with the region 140-4 along the inclined edge 142c, engage with the first projection 134-1 and the second projection 136-1 of the upper flap 130 adjacent to the upper flap 140. Specifically, the first projection 134-1 engages with the end portion 140-3 and the projection 144-2 (mainly the end portion 140-3), and the region 140-4 along the inclined edge 142c engages with the second projection 136-1 by overlapping with it.

[0082] Similarly, the end portion 140-1 and the projection 144-1, and the region 140-2 along the inclined edge 142b engage with the first projection 124-2 and the second projection 126-2 of the upper flap 120 adjacent to the upper flap 110. Specifically, the first projection 124-2 engages with the end portion 140-1 and the projection 144-1 (mainly the end portion 140-1), and the region 140-2 along the inclined edge 142b engages with the second projection 126-2 by overlapping with it.

[0083] In other words, the end portion 140-1 and projection 144-1 (mainly the end portion 140-1) and region 140-2 provided on the right side end region of the top flap 140 engage with the first projection 124-2 and the second projection 126-2 provided on the rear end region of the top flap 120, and the end portion 140-3 and projection 144-2 (mainly the end portion 140-3) and region 140-4 provided on the left side end region of the top flap 140 engage with the first projection 134-1 and the second projection 136-1 provided on the rear end region of the top flap 130.

[0084] Specifically, as shown in Figure 23, the end portion 140-3 and region 140-4 provided in the left side end region of the upper flap 140 constitute the rear left engaging portion (second engaging portion) 140P, and the end portion 140-1 and region 140-2 provided in the right side end region of the upper flap 140 constitute the rear right engaging portion (second engaging portion) 140Q. In addition, the first protrusion 134-1 and the second protrusion 136-1 provided in the rear end region of the upper flap 130 constitute the left rear engaging portion (first engaging portion) 130Q, and the first protrusion 124-2 and the second protrusion 126-2 provided in the rear end region of the upper flap 120 constitute the right rear engaging portion (first engaging portion) 120Q.

[0085] Then, the left rear engagement portion 140P and the left rear engagement portion 130Q form the left rear engagement portion pair F3, and the right rear engagement portion 140Q and the right rear engagement portion 120Q form the right rear engagement portion pair F4 (see Figure 23). Furthermore, if the form of the first engagement portion is designated as the A engagement portion and the form of the second engagement portion is designated as the B engagement portion, then the left rear engagement portion 130Q and the right rear engagement portion 120Q become the A engagement portion, and the rear left engagement portion 140P and the rear right engagement portion 140Q become the B engagement portion.

[0086] The state in which the upper flaps 120 and 130 on the longer side and the upper flaps 110 and 140 on the shorter side are superimposed is the same at all four engagement positions. Therefore, to explain the configuration at the left corner of the back surface, when the upper flap 130 is superimposed on the upper flap 140, as shown in Figure 22, in a planar perspective view, the broken line C17, which is the base end of the first protruding portion 134-1, approximately coincides with the extension line of the side portion 142c of the upper flap 140. Furthermore, the second projection 136-1 overlaps with the region 140-4 along the edge 142c, the first projection 134-1 overlaps with the end region of the upper flap body 142 (end portion 140-3 and projection 144-2 (mainly the end portion 140-3)), and the end region of the upper flap body 132 (the region inside the broken line C17) overlaps with the projection 144-2 of the upper flap 140. In plan view, the notch 142K between the projection 144-2 and the edge 142c faces the notch 131K between the first projection 134-1 and the second projection 136-1.

[0087] In the unfolded state of the inner box A, the edges 112a of the top flap 110, 122a of the top flap 120, 132a of the top flap 130, and 142a of the top flap 140 are formed on the same straight line, and the lengths from the base to the tip of the top flaps 110, 120, 130, and 140 are formed to be the same.

[0088] Furthermore, the top flaps 110 to 140 may be made easier to fold by forming multiple straight cuts at intervals along each fold line C11 between the front portion 10 and the top flap 110, C12 between the side portion 20 and the top flap 120, C13 between the side portion 30 and the top flap 130, and C14 between the back portion 40 and the top flap 140.

[0089] When the inner box section A is assembled into a box shape, the front section 10 and the back section 40 are parallel to each other, the side sections 20 and 30 are parallel to each other, and each component constituting the bottom section 50 is approximately perpendicular (or may be perpendicular) to the front section 10, side sections 20 and 30, and back section 40. In other words, the sleeve-shaped section 1 is approximately perpendicular (or may be perpendicular) to the bottom section 50. Also, adjacent components of each component constituting the sleeve-shaped section 1 (front section 10, side sections 20 and 30, and back section 40) are perpendicular (or may be approximately perpendicular) to each other.

[0090] Furthermore, the inner box section A can be folded into a flat shape (see Figure 17). In the inner box section A, by reducing the angle between the front section 10 and the side section 30 (i.e., making it smaller than a right angle), and by reducing the angle between the back section 40 and the side section 20 (i.e., making it smaller than a right angle), the rectangular cylindrical sleeve section 1 becomes flattened, and each part constituting the bottom section 50 rotates within the sleeve section 1, allowing the inner box section A to be folded into a flat shape as a whole. When the inner box section A is folded, each part constituting the bottom section 50 is approximately parallel to the front section 10, side sections 20 and 30, and back section 40 that constitute the sleeve section 1 within the sleeve section 1.

[0091] Next, the outer box section B is a box that covers the inner box section A, and as shown in Figures 1 to 3, Figures 11 to 13, etc., it has a sleeve-shaped section (outer sleeve-shaped section) 201, flap sections 260 and 290, and lid sections 270 and 280, and its unfolded state is formed as shown in Figures 11 to 13.

[0092] Here, the sleeve-shaped portion 201, when assembled, has a rectangular cylindrical shape and includes a front portion (outer front portion) 210, a side portion (outer right side portion) 220, a side portion (outer left side portion) 230, a back portion (outer back portion) 240, and an adhesive portion 249.

[0093] Here, the front section 210 has a roughly rectangular shape. In other words, a vertically elongated strip-shaped notch K3 is provided at the boundary between the front section 210 and the side section 230, so the front section 210 is formed in a roughly rectangular shape. The lateral length of this front section 210 (the length between the folded line C21 and the folded line C22) is formed to be slightly larger than the lateral length of the front section 10 so that the inner box section A can be housed inside.

[0094] Furthermore, the side portion 220 is connected to the right side end of the front portion 210 via a bent line C22, and has a rectangular shape with a notch K4 on the lower side.

[0095] In other words, the notch K4 is formed in a roughly trapezoidal shape by a side portion 220a formed in a wavy shape in the lateral direction and side portions 220b and 220c formed at an angle from both sides of side portion 220a. That is, the lower side portion of the side portion 220 is formed by straight side portions 220d and 220e that form the lower edge of the side portion 220 and side portions 220a, 220b, and 220c that form the edge portion of the notch K4. Side portion 220d is formed on the rear side from the lower end of the fold line C22 between the side portion 220 and the front portion 210, and side portion 220b is connected from the rear end of side portion 220d. Also, side portion 220e is formed on the front side from the lower end of the fold line C23 between the side portion 220 and the back portion 240, and side portion 220c is connected from the front end of side portion 220e.

[0096] Then, a cut line (first cut line) 221K is formed from the point of contact between edge 220a and edge 220b toward the upper front corner of the side portion 220 (i.e., the upper end of the fold line C22), and a cut line (first cut line) 222K is provided from the point of contact between edge 220a and edge 220c toward the upper back corner of the side portion 220 (i.e., the upper end of the fold line C23), and the side portion 220 is divided into a central region 222, an end region 224, and an end region 226 via the cut lines 221K and 222K. In other words, the region sandwiched between the cut lines 221K and 222K is the central region 222, the region on the front side of the central region 222 is the end region 224, and the region on the back side of the central region 222 is the end region 226. At the cut lines 221K and 222K, multiple roughly V-shaped cuts are arranged in a straight line to form the cut line. In other words, a pair of cut lines 221K and 222K are formed with a gap between them, extending from the upper front corner and the upper back corner of the side portion 220 toward the lower edge of the side portion 220, and the gap between cut line 221K and cut line 222K becomes shorter as it goes downwards.

[0097] Furthermore, the central region 222 is provided with an adhesive piece portion 222-1 surrounded by a cut line 223K. Specifically, the cut line 223K is formed at the boundary with the lid portion 270 and is formed by a straight cut 223K-1 formed in a direction parallel to the upper edge of the side portion 220, a roughly arc-shaped cut line 223K-2 formed downward from the front end of the cut 223K-1, a roughly arc-shaped cut line 223K-3 formed downward from the rear end of the cut 223K-1, and a straight cut line 223K-4 formed between cut lines 223K-2 and 223K-3. The cut line 223K-4 is formed parallel to the cut 223K-1. The adhesive piece portion 222-1 is adhered to the outer surface of the side portion 20 of the inner box portion A. In the central region 222, the area other than the adhesive piece portion 222-1 becomes the central region body 222-2. Similarly, in the side portion 220, the area other than the adhesive piece portion 222-1 becomes the side portion body portion 220-1. In other words, the central region body 222-2, the end region 224, and the end region 226 constitute the side portion body portion 220-1.

[0098] Furthermore, the notch 223K-1 is formed slightly below the fold line C32 between the side portion 220 and the lid portion 270, and a short notch perpendicular to the fold line C32 is formed between the end of the notch 223K-1 and the inner end of the fold line C32, so as not to hinder bending through the fold line C32.

[0099] Furthermore, although the above description states that the cut line 223K-1 along the upper edge of the adhesive piece 222-1 is formed along the boundary with the lid 270, it may also be provided below the upper edge of the side portion 220. Note that since the upper edge of the adhesive piece 222-1 constitutes the upper edge of the side portion 220, the adhesive piece 222-1 can be easily made to protrude upward relative to the upper edge of the side portion 20.

[0100] The side portion 220 is constructed as described above and has a symmetrical shape with respect to the vertical center line. In addition, the lateral length of the side portion 220 (the length between the broken line C22 and the broken line C23) is formed to be slightly larger than the lateral length of the side portion 20.

[0101] Furthermore, the side section 230 is connected to the left side end of the front section 210 via the bent line C21 and the connecting piece 250, and has a configuration substantially the same as the side section 220.

[0102] In other words, the side portion 230 has a rectangular shape with a notch K5 on the lower side, and the notch K5 is formed in a roughly trapezoidal shape by a side portion 230a formed in a wavy shape in the lateral direction and side portions 230b and 230c formed at an angle from both sides of side portion 230a. That is, the lower side portion of the side portion 230 is formed by straight side portions 230d and 230e that form the lower side of the side portion 230 and side portions 230a, 230b and 230c that form the side portion of the notch K5. Side portion 230d is formed from the lower end of the notch K3 between the side portion 230 and the front portion 210 to the rear, and side portion 230b is connected to the rear end of side portion 230d. Furthermore, the edge portion 230e is formed from the lower end of the edge portion 230f on the rear side of the side portion 230 toward the front, and the edge portion 230c is connected to the front end of the edge portion 230e.

[0103] Between the side portion 230 and the front portion 210, a fold line C21, a connecting piece 250, and a notch K3 are provided in the order of fold line C21, connecting piece 250, and notch K3 from top to bottom. A cut line is provided along the fold line C21, and a straight cut perpendicular to the fold line C21 is formed at the lower end of the fold line C21, with the area between this cut and the notch K3 becoming the connecting piece 250. The connecting piece 250 is formed to a length and position that engages with the opening K2, and the notch K3 is formed to a length and position that engages with the lower part of the opening K2 in the inner box portion A. In other words, in the state of the packaging box P, the connecting piece 250 engages with the opening K2 of the inner box portion A, and the lower part of the opening K2 in the inner box portion A engages with the notch K3. Although a cut line is formed along the fold line C21, it is formed so as not to break during the manufacturing of the packaging box P. In other words, if the cut line breaks during manufacturing, misalignment will occur when the adhesive portion 249 is bonded, so care should be taken to prevent breakage during the manufacturing of the packaging box P.

[0104] Then, similar to the side portion 220, a cut line 231K is formed from the point of contact between edge portions 230a and 230b toward the upper front corner of the side portion 230 (i.e., the upper end of the broken line C21), and a cut line 232K is provided from the point of contact between edge portions 230a and 230c toward the upper back corner of the side portion 230 (i.e., the upper end of edge portion 230f). The side portion 230 is divided into a central region 232, an end region 234, and an end region 236 via the cut lines 231K and 232K. In other words, the region between the cut lines 231K and 232K is the central region 232, the region on the front side of the central region 232 is the end region 234, and the region on the back side of the central region 232 is the end region 236. At the cut lines 231K and 232K, multiple roughly V-shaped cuts are arranged in a straight line to form the cut line. In other words, a pair of cut lines 231K and 232K are formed with a gap between them, extending from the upper front corner and the upper back corner of the side portion 230 toward the lower edge of the side portion 230, and the gap between cut line 231K and cut line 232K becomes shorter as it goes downwards.

[0105] Furthermore, the central region 232 is provided with an adhesive piece portion 232-1 surrounded by a cut line 233K. Specifically, the cut line 233K is formed at the boundary with the lid portion 280 and is formed by a straight cut 233K-1 formed in a direction parallel to the upper edge of the side portion 230, a substantially arc-shaped cut line 233K-2 formed downward from the front end of the cut 233K-1, a substantially arc-shaped cut line 233K-3 formed downward from the rear end of the cut 233K-1, and a straight cut line 233K-4 formed between cut lines 233K-2 and 233K-3. The cut line 233K-4 is formed parallel to the cut 233K-1. The adhesive piece portion 232-1 is adhered to the outer surface of the side portion 30 of the inner box portion A. The area of ​​the central region 232 other than the adhesive piece portion 232-1 becomes the central region body 232-2. Similarly, the area of ​​the side portion 230 other than the adhesive piece portion 232-1 becomes the side portion body portion 230-1. In other words, the central region body 232-2, the end region 234, and the end region 236 constitute the side portion body portion 230-1. Since the upper edge of the adhesive piece portion 232-1 forms the upper edge of the side portion 230, the adhesive piece portion 232-1 can be easily made to protrude upward relative to the upper edge of the side portion 30.

[0106] Furthermore, the notch 233K-1 is formed slightly below the fold line C33 between the side portion 230 and the lid portion 280, and a short notch perpendicular to the fold line C33 is formed between the end of the notch 233K-1 and the inner end of the fold line C33, so as not to interfere with bending through the fold line C33.

[0107] Furthermore, although the above description states that the cut line 233K-1 along the upper edge of the adhesive piece 232-1 is formed along the boundary with the lid 280, it may also be provided below the upper edge of the side portion 230.

[0108] As described above, the side portion 230 is symmetrical with respect to the vertical center line, except for the configuration of the boundary portion with the front portion 210. The lateral length of the side portion 230 is approximately the same as the lateral length of the side portion 220 (that is, the length between the broken line C22 and the broken line C23 and the length between the broken line C21 and the edge portion 230f are approximately the same), and it can be said that the side portion 230 is almost symmetrical with respect to the side portion 220.

[0109] Furthermore, the rear portion 240 is connected to the rear end of the side portion 220 via a bent line C23 and has a rectangular shape.

[0110] Furthermore, the lateral length of the back portion 240 is the same as the lateral length of the front portion 210, and the length between the folded line C23 and folded line C24 is the same as the length between the folded line C21 and folded line C22.

[0111] Furthermore, the adhesive margin 249 is connected to the left side edge of the back portion 240 via a fold line C24 and has a long, narrow, trapezoidal shape in the vertical direction. As shown in Figure 2, the inner surface of this adhesive margin 249 is adhered to the outer surface of the side portion 230.

[0112] In the unfolded state of the outer box section B, the lower edge of the front section 210, the lower edge of the side section 220 (the lower edges of the end regions 224 and 226), the lower edge of the side section 230 (the lower edges of the end regions 234 and 236), and the lower edge of the back section 240 are formed on the same straight line, and these lower edges constitute the lower edge of the sleeve-shaped section 201.

[0113] Furthermore, in the unfolded state of the outer box portion B, the fold lines C31, C32, C33, and C34 are formed on the same straight line and are parallel to the lower edge of the sleeve-shaped portion 201.

[0114] Furthermore, in the unfolded state of the outer box portion B, the fold lines C21, C22, C23, C24, and the edge portion 230f are formed parallel to each other and perpendicular to the lower edge of the sleeve-shaped portion 201.

[0115] Furthermore, the length L2 between the upper edge (i.e., the folded line C32) and the lower edge of the side portion 220 is longer than the length L21 between the upper edge (i.e., the folded line C12) and the lower edge of the side portion 20, and the length L3 between the upper edge (i.e., the folded line C33) and the lower edge of the side portion 230 is longer than the length L31 between the upper edge (i.e., the folded line C13) and the lower edge of the side portion 30 (L2>L21, L3>L31). As a result, the upper end of the adhesive piece 222-1 is positioned above the upper edge of the side portion 20, and the upper end of the adhesive piece 232-1 is positioned above the upper edge of the side portion 30, so that the adhesive piece 222-1 protrudes upward from the upper edge of the side portion 20, and the adhesive piece 232-1 protrudes upward from the upper edge of the side portion 30. Therefore, when the cutting lines 221K, 222K, 223K, 231K, 232K, and 233K are broken and the parts of the outer box B other than the adhesive pieces 222-1 and 232-1 are removed, the upper end of adhesive piece 222-1 protrudes upward from the upper edge of the side part 20, and the upper end of adhesive piece 232-1 protrudes upward from the upper edge of the side part 30.

[0116] Furthermore, if the length of the top flap 120 from its base to its tip (i.e., the length from the folded line C12 to the side portion 122a) is defined as length L22, then the sum of lengths L21 and L22 is longer than length L2 (L21 + L22 > L2). Similarly, if the length of the top flap 130 from its base to its tip (i.e., the length from the folded line C13 to the side portion 132a) is defined as length L32, then the sum of lengths L31 and L32 is longer than length L3 (L31 + L32 > L3). As a result, when the lid portions 270 and 280 are closed, the top flap 120 is pressed by the lid portion 270 and bends diagonally relative to the side portion 20, and the top flap 130 is pressed by the lid portion 280 and bends diagonally relative to the side portion 30.

[0117] Furthermore, if the length from the base to the tip of the top flap 110 (i.e., the length from the broken line C11 to the edge portion 112a) is defined as length L12, then the sum of the lengths L11 and L12 between the upper edge (i.e., broken line C11) and the lower edge of the front portion 10 is longer than the length L1 between the upper edge (i.e., broken line C31) and the lower edge of the front portion 210 (L11 + L12 > L1). Similarly, if the length from the base to the tip of the top flap 140 (i.e., the length from the broken line C14 to the edge portion 142a) is defined as length L42, then the sum of the lengths L41 and L42 between the upper edge (i.e., broken line C14) and the lower edge of the back portion 40 is longer than the length L4 between the upper edge (i.e., broken line C34) and the lower edge of the back portion 240 (L41 + L42 > L4). As a result, when the flap sections 260 and 290 are closed, the top flap 110 is pushed by the flap section 260 and bends diagonally relative to the front section 10, and the top flap 140 is pushed by the flap section 290 and bends diagonally relative to the back section 40.

[0118] Furthermore, the flap portion 260 is connected to the upper end of the front portion 210 via a folded line C31 and has a shape in which regions along both sides of the rectangular shape are cut out. In other words, the flap portion 260 has a trapezoidal portion 260-1 having an isosceles trapezoidal shape and a rectangular portion 260-2 that is connected to the tip of the trapezoidal portion 260-1 and exhibits a rectangular shape. That is, the flap portion 260 has a shape in which both sides are cut out so that when the lid portions 270 and 280 are closed with the flap portion 260 closed, the upper flaps 120 and 130 do not come into contact with the flap portion 260.

[0119] Furthermore, the lid portion 270 is connected to the upper end of the side portion 220 via a bent line C32, and has a roughly rectangular shape, with the corners on both ends of the rectangular shape being chamfered.

[0120] Furthermore, the lid portion 280 is connected to the upper end of the side portion 230 via a bend line C33, and has a roughly square shape (roughly rectangular), with the corners on both ends of the rectangular shape being chamfered. This lid portion 280 is formed to be the same size and shape as the lid portion 270.

[0121] Furthermore, the flap portion 290 is connected to the upper end of the back portion 240 via a folded line C34, and, like the flap portion 260, has a shape in which regions along both sides of the rectangular shape are cut out. In other words, the flap portion 290 has a trapezoidal portion 290-1 having an isosceles trapezoidal shape, and a rectangular portion 290-2 that is connected to the tip of the trapezoidal portion 290-1 and exhibits a rectangular shape. That is, the flap portion 290 has a shape in which both sides are cut out so that when the lid portions 270 and 280 are closed with the flap portion 290 closed, the upper flaps 120 and 130 do not come into contact with the flap portion 290.

[0122] These lids 270, 280 and flaps 260, 290 open and close the top surface of the outer box B, and in particular, closing the lids 270, 280 closes the top surface of the outer box B. In other words, the length of the lids 270, 280 from the base to the tip is half the lateral length of the front part 210 and the back part 240, and when the lids 270, 280 are closed, the tip of lid 270 and the tip of lid 280 are in contact. The lids 270, 280 and flaps 260, 290 are of what is known as type A. The lids 270, 280 and flaps 260, 290 are initially erected upwards, leaving the top of the outer box B open.

[0123] When the outer box section B is assembled into a box shape, the front section 210 and the back section 240 are parallel to each other, and the side sections 220 and 230 are parallel to each other. In addition, adjacent members of each component constituting the sleeve-shaped section 201 (front section 210, side sections 220, 230, and back section 240) are at right angles (or nearly right angles) to each other.

[0124] Next, the inner box A and the outer box B are bonded to each other at the locations of the adhesive pieces 222-1 and 232-1. In other words, the inner surface of the adhesive piece 222-1 and the outer surface of the side portion 20 are bonded together by adhesive or other adhesive means, and the inner surface of the adhesive piece 232-1 and the outer surface of the side portion 30 are bonded together by adhesive or other adhesive means, thereby forming the packaging box P as a whole. Specifically, an adhesive layer (not shown) is provided between all or part of the inner surface of the adhesive piece 222-1 and the outer surface of the side portion 20, and similarly, an adhesive layer (not shown) is provided between all or part of the inner surface of the adhesive piece 232-1 and the outer surface of the side portion 30. As a result, the sleeve-shaped portion 201 of the outer box portion B is provided along the outer surface of the sleeve-shaped portion 1 in the inner box portion A. For example, the front portion 210 is provided along the outer surface of the front portion 10, the side portion 220 is provided along the outer surface of the side portion 20, the side portion 230 is provided along the outer surface of the side portion 30, and the back portion 240 is provided along the outer surface of the back portion 40. Then, by rotating the lower end of the central region 222 outward (i.e., upward), the cut lines 221K and 222K on both sides of the central region 222 are broken, and the cut line 223K around the adhesive piece 222-1 is broken. Similarly, by rotating the lower end of the central region 232 outward (i.e., upward), the cut lines 231K and 232K on both sides of the central region 222 are broken, and the cut line 233K around the adhesive piece 232-1 is broken, thereby allowing the parts of the outer box B other than the adhesive pieces 222-1 and 232-1 to be removed. The adhesive piece 222-1 remains adhered to the side surface 20 of the inner box A, and the adhesive piece 232-1 remains adhered to the side surface 30 of the inner box A.

[0125] Furthermore, when the inner box A and the outer box B are bonded together, the lower end of the inner box A and the lower end of the outer box B are formed to be at the same height. Note that the inner box A and the outer box B are not bonded to each other except at the locations of the adhesive pieces 222-1 and 232-1.

[0126] As described above, the inner box A is housed inside the outer box B, the height of the lower end of the outer box B is the same as the height of the lower end of the inner box A, and when the lids 270 and 280 are sealed, only the bottom surface 50 of the inner box A is exposed.

[0127] Furthermore, the packaging box P with the above configuration can be folded into a flat shape by aligning the front portion 210 to be approximately parallel to the side portion 230 and the side portion 220 to be approximately parallel to the back portion 240 (see Figure 17).

[0128] Furthermore, in the inner box section A and outer box section B described above, creases for folding are pre-formed at each fold line.

[0129] The manufacturing process for the packaging box P with the above configuration will now be explained. First, the inner box A and outer box B are manufactured in their unfolded state.

[0130] Next, the outer surface of the inner box A is bonded to the inner surface of the outer box B (first bonding step). That is, with the inner surface of the unfolded outer box B facing upwards, adhesive is applied to the bonding pieces 222-1 and 232-1, and the unfolded inner box A is placed on top as shown in Figure 14. This bonds the bonding piece 222-1 to the side piece 20, and the bonding piece 232-1 to the side piece 30. At this time, the lower edge of the sleeve-shaped part 201 of the outer box B and the lower edge of the sleeve-shaped part 1 of the inner box A are aligned, and the fold lines C2 and C22 are aligned in the outer box B and inner box A. Note that in the sleeve-shaped part 1 and sleeve-shaped part 201, the lateral length of the corresponding members is basically longer in the outer box B, so the fold line C23 is slightly shifted outward relative to the fold line C3, and the fold line C21 is slightly shifted outward relative to the fold line C1.

[0131] When adhesive piece 222-1 is attached to side portion 20, its length L1 is longer than length L11, so adhesive piece 222-1 protrudes upward from the top edge of side portion 20. Similarly, when adhesive piece 232-1 is attached to side portion 30, its length L2 is longer than length L21, so adhesive piece 232-1 protrudes upward from the top edge of side portion 30.

[0132] Next, each part constituting the bottom surface 50 of the inner box A is folded inward relative to the sleeve-shaped part 1, and further, the tip 74 of the second piece 70 is folded outward relative to the main body 72, and the tip 84 of the third piece 80 is folded outward relative to the main body 82, resulting in the state shown in Figure 15 (folding process). In other words, the first piece 60 is folded towards the front part 10 via the fold line at the boundary with the front part 10, the second piece 70 is folded towards the side part 20 via the fold line at the boundary with the side part 20, the third piece 80 is folded towards the side part 30 via the fold line at the boundary with the side part 30, the fourth piece 90 is folded towards the back part 40 via the fold line at the boundary with the back part 40, and further, the tip 74 is folded towards the main body 72, and the tip 84 is folded towards the main body 82.

[0133] Next, adhesive is applied to the area of ​​the first piece 60 (the area shown in the hatching) (adhesive application step), and the side portion 230 is folded inward towards the front portion 210 via the fold line C21 (folding step), thereby folding the side portion 30 towards the front portion 10 via the fold line C1, resulting in the state shown in Figure 16. This adheres the tip portion 84 and the first piece 60. Note that the adhesive may be applied to the tip portion 84 instead of the first piece 60.

[0134] Next, adhesive is applied to the area of ​​the fourth piece 90 (the area shown in the hatching), the area of ​​the adhesive allowance 49 (the area shown in the hatching), and the area of ​​the adhesive allowance 249 (the area shown in the hatching) (adhesive application step). The back portion 240 is then folded inward towards the side portion 220 via the fold line C23, and the back portion 40 is folded towards the side portion 20 via the fold line C3, resulting in the state shown in Figure 17. As a result, the fourth piece 90 and the tip portion 74 are bonded together, the adhesive allowance 49 is bonded to the back portion 40, and the adhesive allowance 249 is bonded to the side portion 230 (bonding step).

[0135] The application of adhesive to the fourth piece 90 and the adhesive margin 249 may be performed in the state shown in Figure 15, before the side portions 230 and 30 are folded back.

[0136] Alternatively, instead of the adhesive margin 49, adhesive may be applied to the bonding area of ​​the back portion 40 with the adhesive margin 49; instead of the adhesive margin 249, adhesive may be applied to the bonding area of ​​the side portion 230 with the adhesive margin 249; and instead of the fourth piece portion 90, adhesive may be applied to the tip portion 74.

[0137] The packaging box P is manufactured in the manner described above. This manufacturing process is automated by an assembly machine.

[0138] The usage state of the packaging box P with the above configuration will now be described. When the packaging box P is not in use, it can be folded into a flat shape and stored in that state. That is, since the outer box part B has a sleeve-shaped part 201 and the inner box part A has a sleeve-shaped part 1, the packaging box P can be folded into a flat shape even in its state. This can be achieved by increasing the angle between the front part 210 and the side part 220, and by increasing the angle between the side part 230 and the back part 240.

[0139] Next, when using the packaging box P, the packaging box P is assembled. Specifically, the front portion 210 and the back portion 240 of the outer box portion B are made parallel to each other, and the side portions 220 and 230 are made parallel to each other, and the front portion 10 and the back portion 40 of the inner box portion A are made parallel to each other, and the side portions 20 and 30 are made parallel to each other, and the bottom portion 50 is made perpendicular to the sleeve portions 1 and 201, thereby assembling the packaging box P into a three-dimensional shape.

[0140] Then, as shown in Figure 18, multiple items to be stored (products) G are placed inside the inner box A from the top of the packaging box P. The items to be stored in the inner box A are of a size that can be removed from the opening K1 of the inner box A. The lids 270, 280 and flaps 260, 290 are already erected at the top, and the top of the outer box B is open, so the items to be stored G can be placed directly inside the packaging box P from the top. After that, the flaps 260, 290 are closed, then the lids 270, 280 are closed, and as shown in Figure 19, adhesive tape T is applied from the front 210 of the outer box B, through the top surface, to the back 240 side, thereby sealing the lids 270, 280. As explained above, the top flaps 110-140 are bent diagonally because they are pressed by the flaps 260, 290 and the lids 270, 280.

[0141] Once the contents G are packaged in the packaging box P as described above, the packaging box P containing the contents G is transported to the location where the contents G will be displayed.

[0142] Subsequently, when displaying the contents, the outer box B is separated from the inner box A. Specifically, by rotating the lower end of the central region 222 outward, the cut lines 221K and 222K on both sides of the central region 222 are broken, as well as the cut line 223K around the adhesive piece 222-1. Similarly, by rotating the lower end of the central region 232 outward, the cut lines 231K and 232K on both sides of the central region 222 are broken, as well as the cut line 233K around the adhesive piece 232-1 (see Figure 20). Then, the parts of the outer box B other than the adhesive pieces 222-1 and 232-1 are removed. In other words, in order to remove the outer box part B, excluding the adhesive piece 222-1 and the left adhesive piece 232-1, from the inner box part A, the cut line between the adhesive piece 222-1 and the side body part 220-1 is broken, as is the cut line between the adhesive piece 232-1 and the side body part 230-1.

[0143] As shown in Figure 21, the inner box A remains with the adhesive pieces 222-1 and 232-1 attached and the contents to be stored inside, so the inner box A is displayed in that state.

[0144] In the state shown in Figure 21, the stored items can be removed from the opening K1, as well as from the top of the inner box A.

[0145] In Figures 21 and 24, the stored items are actually present, but they are omitted from the illustration.

[0146] Next, we will explain how to stack the inner box sections A. To stack the inner box sections A, adjacent top flaps 110 to 140 are engaged with each other to form a frame-shaped section (frame-shaped mounting section) Z (see Figure 24) along the top edge of the inner box section A.

[0147] That is, as shown in Figures 22 and 23, at the front left corner of the inner box A, the first protrusion 134-2 and the second protrusion 136-2 (i.e., the left front engaging portion 130P) of the upper flap 130, and the region 110-2, end portion 110-1 and protrusion 114-1 (mainly, region 110-2 and end portion 110-1 (i.e., front left corner) The joint portion 110P)) engages with the right front corner of the inner box portion A, and the first protrusion 124-1 and the second protrusion 126-1 of the upper flap 120 (i.e., the right front engaging portion 120P) engage with the region 110-4, end portion 110-3 and protrusion 114-2 (mainly region 110-4 and end portion 110-3 (i.e., the front right engaging portion 110) along the inclined edge portion 112c of the upper flap 110 Q)) engages with the left rear corner of the inner box A, and the first protrusion 134-1 and second protrusion 136-1 of the top flap 130 (i.e., the left rear engaging portion 130Q) and the region 140-4, end portion 140-3 and protrusion 144-2 along the inclined edge portion 142c of the top flap 140 (mainly region 140-4 and end portion 140-3 (i.e., the rear left engaging portion 140P)) The parts engage, and at the right rear corner of the inner box A, the first protrusion 124-2 and the second protrusion 126-2 of the top flap 120 (i.e., the right rear engaging part 120Q) engage with the region 140-2, end portion 140-1, and protrusion 144-1 along the inclined edge portion 142b of the top flap 140 (mainly region 140-2 and end portion 140-1 (i.e., the rear right engaging part 140Q)). Figure 22 shows the state before the top flaps 120 and 130 are overlapped and engaged with the top flaps 110 and 140, and Figure 23 shows the state after engagement.

[0148] Since the engagement methods for the left front engagement pair F1, the right front engagement pair F2, the left rear engagement pair F3, and the right rear engagement pair F4 of the inner box A are the same, the engagement method for the left rear engagement pair F3 will be explained using this as an example. As shown in Figure 22, the upper flap 130, which is the upper flap on the long side, is placed on top of the upper flap 140, which is the upper flap on the short side (that is, the left rear engagement pair (first engagement pair) consisting of the first protrusion 134-1 and the second protrusion 136-1 and the rear left engagement pair (second engagement pair) consisting of the end portion 140-3 and the region 140-4 are placed on top of each other), and from that state, the second protrusion 136-1 is pushed downward. As a result, the upper flap 140 is pushed together with the second projection 136-1, causing the upper flap 130 and the upper flap 140 to tilt downward, and the tip of the second projection 136-1 approaches the edge 142c of the upper flap 140. Note that when the upper flap 130 tilts downward, the first projection 134-1 bends relative to the upper flap body 132 via the fold line C17 (the fold line C17 is a valley fold), so there is no obstacle to the upper flap 130 tilting downward.

[0149] Then, after the second projection 136-1 comes into contact with the edge portion 142c, the second projection 136-1 becomes located below the region along the edge portion 142c, and the first projection 134-1 is located above the upper flap 140 (particularly the end portion 140-3), while the second projection 136-1 is located below the upper flap 140 (particularly the region 140-4), thereby engaging the upper flap 130 and the upper flap 140. In this way, by pushing in the second projection 136-1, the fold line C17 at the base end of the first projection 134-1 becomes a valley fold, and the second projection 136-1 is located below the region 140-4 along the edge portion 142c (second inclined edge), so that the first engaging portion and the second engaging portion can be easily engaged.

[0150] Furthermore, since the upper flap 140 is provided with a projection 144-2, it supports the base portion of the first projection 134-1 and the area inside the folded line C17, preventing the first projection 134-1 from being positioned below the upper flap 140 when the second projection 136-1 is positioned below the upper flap 140.

[0151] In other words, the protruding portions 114-1, 114-2, 144-1, and 144-2 support the base portion of the first protruding portions 134-2, 124-1, 124-2, and 134-1, as well as the area inside the base portion.

[0152] When the left front engagement pair, the right front engagement pair, the left rear engagement pair, and the right rear engagement pair are engaged, the state is as shown in Figure 23, and the upper flaps 110-140 are formed in a frame shape with the sleeve-shaped portion 1 bent inward, and the frame-shaped portion Z is formed by the upper flaps 110-140 (see Figure 24). As shown in Figure 23, each upper flap engages with all adjacent upper flaps, so the state in which the upper flaps 110-140 are bent with respect to the sleeve-shaped portion 1 can be sufficiently maintained.

[0153] Note that Figure 24 omits the contents to be stored, but Figure 25 shows the contents to be stored in Figure 24.

[0154] Once the frame-shaped part Z is formed as described above, the inner box part A is stacked on top of the frame-shaped part Z of the inner box part A, as shown in Figure 26. The adhesive pieces 222-1 and 232-1 are attached to the inner box part A, and the adhesive piece 222-1 protrudes upward from the upper edge of the side part 20, and the adhesive piece 232-1 protrudes upward from the upper edge of the side part 30. Therefore, when the upper inner box part A is stacked, the adhesive piece 222-1 is located outside the side part 20 and the adhesive piece 232-1 is located outside the side part 30 of the upper inner box part A.

[0155] When the inner boxes A are stacked, the contents of the inner box A at the top can be removed from the opening K1 and from above the inner box A, while the contents of the inner boxes A other than the top can be removed from the opening K1.

[0156] In the packaging box P of the present invention, a frame-like portion Z can be formed by engaging the top flaps 110 to 140 with each other, and other inner box portions A can be stacked on top of this frame-like portion Z. Furthermore, since the top flaps 110 and 140 are provided not only on both the left and right sides but also on the front and back of the frame-like portion Z, it is possible to prevent the upper inner box portion A from falling even if it shifts in the left-right direction, and it can be stacked stably.

[0157] Furthermore, since the inner box A only needs to be placed on the frame-shaped part Z, it can be easily stacked, and there is no need for the troublesome work of engaging the protruding part with the engaging hole as in Patent Document 1.

[0158] Furthermore, the top flaps 110-140 are connected to the upper edge of the sleeve-shaped section 1 and do not intrude into the storage space of the inner box section A, thus not narrowing the storage space of the inner box section A.

[0159] Furthermore, since adhesive pieces 222-1 and 232-1 are provided protruding from both the left and right sides of the inner box A, the stacked inner boxes A will not shift in the left-right direction.

[0160] In the above description, it is stated that a second engaging portion having the form of a B engaging portion is provided on both sides of the upper flap 110 and upper flap 140, and a first engaging portion having the form of an A engaging portion is provided on both sides of the upper flap 120 and upper flap 130. However, in each pair of engaging portions, such as the left front engaging portion pair, the right front engaging portion pair, the left rear engaging portion pair, and the right rear engaging portion pair, it is sufficient if one engaging portion has the form of an A engaging portion and the other engaging portion has the form of a B engaging portion.

[0161] For example, in the left front engagement pair F1, one of the front left engagement part 110P and the left front engagement part 130P may have the form of an A engagement part, and the other may have the form of a B engagement part. Similarly, in the right front engagement pair F2, one of the front right engagement part 110Q and the right front engagement part 120P may have the form of an A engagement part, and the other may have the form of a B engagement part.

[0162] Furthermore, in the left rear engagement portion pair F3, one of the rear left engagement portion 140P and the left rear engagement portion 130Q may have the form of an A engagement portion, and the other may have the form of a B engagement portion. Similarly, in the right rear engagement portion pair F4, one of the rear right engagement portion 140Q and the right rear engagement portion 120Q may have the form of an A engagement portion, and the other may have the form of a B engagement portion.

[0163] In the above description, it was assumed that an opening K1 is provided in the inner box A, but the configuration may be made without the opening K1. That is, the inner box A without the opening K1 is configured as shown in Figure 27, its unfolded view is configured as shown in Figure 28, and the state in which the frame-shaped part Z is formed is as shown in Figure 29.

[0164] When the inner box sections A, which do not have an opening K1, are stacked, the contents will be removed from above the uppermost inner box section A.

[0165] In the above description, the areas of the adhesive pieces 222-1 and 232-1 on the side portions 220 and 230 of the outer box portion B are adhered to the side portions 20 and 30 of the inner box portion A, and the outer box portion B is removed by breaking the cut lines 221K, 222K, and 223K, as well as by breaking the cut lines 231K, 232K, and 233K. However, the packaging box may also be composed of the inner box portion A' shown in Figure 30 and the outer box portion B' shown in Figure 31.

[0166] In other words, in the sleeve-shaped portion 1' of the inner box portion A', the main difference from the inner box portion A is the configuration of the side portions 20 and 30. The side portion 20 has a separation portion 24, which is a region demarcated by a cut line 24a, and a side portion main body portion 22, which is the region other than the separation portion 24. The side portion 30 has a separation portion 34, which is a region demarcated by a cut line 34a, and a side portion main body portion 32, which is the region other than the separation portion 34. The other configurations are the same as those of the inner box portion A, and the configurations of the top flaps 110, 120, 130, and 140 are the same as described above.

[0167] Furthermore, in the sleeve-shaped portion 201' of the outer box portion B', the configuration of the side portions 220 and 230 differs from that of the outer box portion B. As shown in Figure 31, the side portion 220 has a rotating piece portion 228 demarcated by cut lines 228a, 228b and a fold line C228, and a side portion main body portion 229 which is the area other than the rotating piece portion 228, with a separation portion 24 bonded to the rotating piece portion 228. Similarly, the side portion 230 has a rotating piece portion 238 demarcated by cut lines 238a, 238b and a fold line C238, and a side portion main body portion 239 which is the area other than the rotating piece portion 238, with a separation portion 34 bonded to the rotating piece portion 238.

[0168] Then, by pulling the lower end of the rotating piece 228 upward and breaking the cut lines 228a and 228b, the rotating piece 228 is rotated outward relative to the side body 229 with the fold line C228 as the pivot axis, the cut line 24a around the separating piece 24 is broken, the separating piece 24 is separated from the inner box A', and the separating piece 24 moves with the rotating piece 228 while remaining attached to it.

[0169] Similarly, by pulling the lower end of the rotating piece 238 upward and breaking the cut lines 238a and 238b, the rotating piece 238 is rotated outward relative to the side body 239 with the fold line C238 as the pivot axis, the cut line 34a around the separating piece 34 is broken, the separating piece 34 separates from the inner box A', and the separating piece 34 moves with the rotating piece 238 while remaining attached to it.

[0170] Then, by lifting the outer box section B', the outer box section B' can be removed, leaving the inner box section A' with the contents stored inside and the separation sections 24 and 34 separated. The inner box section A' is then displayed with the contents stored inside.

[0171] By engaging adjacent upper flaps 110-140, a frame-like section (frame-like mounting section) can be formed, allowing the inner boxes to be stacked.

[0172] In a packaging box composed of an inner box A' shown in Figure 30 and an outer box B' shown in Figure 31, a frame-like structure can be formed by engaging the top flaps 110-140 with each other. Other inner box A's can be stacked on top of this frame-like structure. Since the frame-like structure has top flaps 110 and 140 not only on both the left and right sides but also on the front and back, it is possible to prevent the upper inner box A' from falling even if it shifts in the left-right direction, allowing for stable stacking.

[0173] Furthermore, since the inner box portion A' only needs to be placed on the frame-shaped portion, it can be easily stacked, and there is no need for the troublesome work of engaging the protruding portion with the engagement hole as in Patent Document 1.

[0174] Furthermore, the top flaps 110-140 are connected to the upper edge of the sleeve-shaped section 1' and do not intrude into the storage space of the inner box section A', thus not narrowing the storage space of the inner box section A'.

[0175] In the above explanation, as shown in Figure 32(a), four upper flaps 110 to 140 are provided on the inner box A, and a left front engaging part pair F1, a right front engaging part pair F2, a left rear engaging part pair F3, and a right rear engaging part pair F4 are provided. However, the explanation is not limited to this, and it is sufficient if three of the four upper flaps are provided.

[0176] In other words, Figure 32(b) shows an example in which upper flaps 110, 120, and 130 are provided, and only the left front engaging pair F1 and the right front engaging pair F2 are provided as engaging pair parts. That is, in the left front engaging pair F1, the front left engaging part 110P and the left front engaging part 130P engage, and in the right front engaging pair F2, the front right engaging part 110Q and the right front engaging part 120P engage.

[0177] In Figure 32(b), upper flaps 110, 120, and 130 are shown, but upper flap 140 may be used instead of upper flap 110, and the configuration may consist of upper flap 120, 130, and 140. In that case, the engaging parts will consist of a left rear engaging part pair F3 and a right rear engaging part pair F4.

[0178] Thus, even when either the top flaps 120 and 130, or the top flaps 110 and 140 are provided, the top flaps are provided along three sides of the inner box. By engaging adjacent top flaps, a U-shaped support section can be formed, allowing the inner boxes to be stacked. Furthermore, because either the top flap 110 or 140 is provided, even if the upper inner box shifts laterally, it can be prevented from falling, allowing for stable stacking.

[0179] Furthermore, since the inner box is simply placed on the U-shaped mounting section, it can be easily stacked, and there is no need for the troublesome process of engaging the protruding part with the engaging hole as in Patent Document 1. In addition, the three top flaps are connected from the top edge of the sleeve-shaped section and do not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed.

[0180] Furthermore, Figure 32(c) shows an example in which upper flaps 110, 120, and 140 are provided, and only the right front engaging pair F2 and the right rear engaging pair F4 are provided as engaging pairings. In other words, in the right front engaging pair F2, the front right engaging part 110Q and the right front engaging part 120P engage, and in the right rear engaging pair F4, the rear right engaging part 140Q and the right rear engaging part 120Q engage.

[0181] In Figure 32(c), upper flaps 110, 120, and 140 are shown, but upper flap 130 may be used instead of upper flap 120, and the configuration may consist of upper flap 110, 130, and 140. In that case, the engaging parts will consist of a left front engaging part pair F1 and a left rear engaging part pair F3.

[0182] Thus, even when either the top flaps 110 and 140 or the top flaps 120 and 130 are provided, the top flaps are provided along three sides of the inner box. By engaging adjacent top flaps, a U-shaped support section can be formed, allowing the inner boxes to be stacked. Furthermore, because the top flaps 110 and 140 are provided, even if the upper inner box shifts laterally, it can be prevented from falling, allowing for stable stacking.

[0183] Furthermore, since the inner box is simply placed on the U-shaped mounting section, it can be easily stacked, and there is no need for the troublesome process of engaging the protruding part with the engaging hole as in Patent Document 1. In addition, the three top flaps are connected from the top edge of the sleeve-shaped section and do not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed.

[0184] Furthermore, in the above description, as shown in Figure 32(a), four upper flaps 110 to 140 are provided on the inner box A, and a left front engagement pair F1, a right front engagement pair F2, a left rear engagement pair F3, and a right rear engagement pair F4 are provided. However, as shown in Figure 32(d), a configuration in which only the left front engagement pair F1 and the right rear engagement pair F4 are provided is also possible. In other words, engagement pairs are provided only at diagonal positions. Note that in Figure 32(d), a left front engagement pair F1 and a right rear engagement pair F4 are provided, but a right front engagement pair F2 and a left rear engagement pair F3 may also be provided.

[0185] Thus, even when four upper flaps 110-140 are provided and pairs of engaging parts are provided only at diagonal positions, the upper flaps 110-140 can be bent relative to the sleeve-shaped part 1(1') to form a frame-shaped part (frame-shaped mounting part), allowing the inner box to be mounted.

[0186] Furthermore, even if pairs of engaging parts are provided only at diagonal positions, the presence of top flaps 110 and 140 prevents the upper inner box from falling even if it shifts laterally, allowing for stable stacking.

[0187] Furthermore, since the inner box is simply placed on the U-shaped mounting section, it can be easily stacked, and there is no need for the troublesome process of engaging the protruding section with the engagement hole as in Patent Document 1. In addition, the four top flaps are connected from the top edge of the sleeve-shaped section and do not intrude into the storage space of the inner box, so the storage space of the inner box is not narrowed.

[0188] As described above, the configuration is such that at least three of the four upper flaps 110 to 140 are provided, all of which engage with at least one adjacent upper flap, and one of the engaging upper flaps is provided with a first engaging portion that engages with the other upper flap, and the other upper flap is provided with a second engaging portion that engages with the first engaging portion of the first upper flap.

[0189] In the above description, the front left engaging portion 110P is provided in the left side end region of the upper flap 110, the front right engaging portion 110Q is provided in the right side end region of the upper flap 110, the rear left engaging portion 140P is provided in the left side end region of the upper flap 140, the rear right engaging portion 140Q is provided in the right side end region of the upper flap 140, the right front engaging portion 120P is provided in the front end region of the upper flap 120, and the right rear engaging portion 120Q is provided in the upper flap Although the front left engaging portion 130P is provided in the rear end region of the top flap 130, and the rear left engaging portion 130Q is provided in the rear end region of the top flap 130, the regions in which the front left engaging portion 110P, front right engaging portion 110Q, rear left engaging portion 140P, rear right engaging portion 140Q, right front engaging portion 120P, right rear engaging portion 120Q, left front engaging portion 130P, and left rear engaging portion 130Q are provided do not have to be the end regions of the top flap.

[0190] For example, as shown in Figure 33(a), a projection 119 is provided adjacent to a notch 110K at the corner of the tip of the upper flap 110(140), and a notch 130K is provided at a position away from the end of the upper flap 130(120) on the upper flap 110(140) side. As shown in Figure 33(b), when the end region of the upper flap 110(140) overlaps with the end region of the upper flap 130(120), the projection 119 engages with the region 139 along the edge forming the notch 130K, thereby engaging the end region and projection 119 of the upper flap 110(140) with the end region and region 139 of the upper flap 130(120). In other words, the region 139 that constitutes the engagement portion of the upper flap 130 (120) is located away from the end region of the upper flap 130 (120).

[0191] In the example shown in Figure 33, the engaging portion of the upper flap 130 (120) is located away from the end region. However, by swapping the upper flap 130 (120) and the upper flap 110 (140), the engaging portion of the upper flap 110 (140) may be located away from the end region.

Explanation of Symbols

[0192] P Packaging box A, A’ Inner box part B, B’ Outer box part 1, 1’ Sleeve-like part (inner sleeve-like part) 10 Front part (inner front part) 20 Side part (inner right side part) 22 Side part main body (inner right side part main body) 24 Separation part (first separation part) 24a Score line 30 Side part (inner left side part) 32 Side part main body (inner left side part main body) 34 Separation part (second separation part) 34a Score line 40 Back part (inner back part) 49 Glue margin part 50 Bottom part 60 First piece part 70 Second piece part 72 Main body part 74 Tip part 80 Third piece part 82 Main body part 84 Tip part 90 Fourth piece part 110 Upper flap (front upper flap) 110P Front left engaging part (second engaging part) 110Q Front right engaging part (second engaging part) 112b, 112c, 142b, 142c Inclined side part (second inclined side) 120 Upper flap (right upper flap) 120P Right front engaging part (first engaging part) 120Q Right rear engaging part (first engaging part) 130 Upper flap (left upper flap) 130P Left front engaging part (first engaging part) 130Q Left rear engaging part (first engaging part) 140 Upper flap (rear upper flap) 140P Rear left engaging part (second engaging part) Rear right engaging part (second engaging part) of 140Q Upper flap bodies of 112, 122, 132, 142 Protrusions of 114-1, 114-2, 144-1, 144-2 First protrusions of 124-1, 124-2, 134-1, 134-2 Second protrusions of 126-1, 126-2, 136-1, 136-2 Sleeve-like parts of 201, 201’ Front part (outer front part) of 210 Side part (outer right side part) of 220 Side part body (outer right side part body) of 220-1 Central area of 222 End areas of 224, 226 Adhesive piece part (right adhesive piece part) of 222-1 Central area body of 222-2 Rotating piece part (first rotating piece part) of 228 Cutting lines of 228a, 228b Side part body (outer right side part body) of 229 Side part (outer left side part) of 230 Side part body (outer left side part body) of 230-1 Central area of 232 End areas of 234, 236 Adhesive piece part (left adhesive piece part) of 232-1 Central area body of 232-2 Rotating piece part (second rotating piece part) of 238 Cutting lines of 238a, 238b Side part body (outer left side part body) of 239 Back part (outer back part) of 240 Gluing margin part Flap parts of 260, 290 Cover parts of 270, 280 Cutting lines of 221K, 222K, 223K, 231K, 232K, 233K Folding lines of C0, C1, C2, C3, C11, C12, C13, C14, C21, C22, C23, C24, C31, C32, C33, C34, C228, C238 Opposite to the left front engaging part F2 Right front engagement part pair F3 Left rear engaging part pair F4 Right rear engagement part pair K1 opening K11, K12 Notches K2 opening K3 Notch

Claims

1. It is a packaging box, It has an inner box section (A) and an outer box section (B), and the inner box section and the outer box section are each formed from a sheet-like blank. The inner box section is Bottom surface (50) and An inner sleeve-shaped portion (1) is erected from each side of the base and is approximately perpendicular to the base, and has an inner front portion (10), an inner right side portion (20), an inner left side portion (30), and an inner back portion (40), and when the inner box portion is assembled into a box shape, the inner sleeve-shaped portion is formed at approximately right angles to the other two adjacent surfaces of the four surfaces: the inner front portion, the inner right side portion, the inner left side portion, and the inner back portion. At least three of the four upper flaps are provided: a front upper flap (110) connected via a fold line from the upper edge of the inner front portion and formed along the upper edge of the inner front portion; a right upper flap (120) connected via a fold line from the upper edge of the inner right side portion and formed along the upper edge of the inner right side portion; a left upper flap (130) connected via a fold line from the upper edge of the inner left side portion and formed along the upper edge of the inner left side portion; and a rear upper flap (140) connected via a fold line from the upper edge of the inner rear portion and formed along the upper edge of the inner rear portion. All of the top flaps in the at least three top flaps engage with at least one adjacent top flap, and in the top flaps that engage with each other, one top flap is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other top flap, and the other top flap is provided with a second engaging portion (120P, 120Q, 130P, 130Q) that engages with the first engaging portion of the first top flap. The outer box is, An outer sleeve-shaped portion (201) provided along the outer surface of the inner box portion, having an outer front portion (210) formed along the outer surface of the inner front portion, an outer right side portion (220) formed along the outer surface of the inner right side portion, an outer left side portion (230) formed along the outer surface of the inner left side portion, and an outer rear portion (240) formed along the outer surface of the inner rear portion, and in the state in which the outer box portion is assembled into a box shape, the outer sleeve-shaped portion has adjacent side portions that are at approximately right angles to each other, It has a lid portion (270, 280) connected via a folded line from the upper end of the outer sleeve-shaped portion, On the outer right side surface, a portion of the outer right side surface is formed as a right adhesive piece (222-1), which is the area of ​​the outer right side surface other than the right adhesive piece, and is separable from the outer right side surface main body (220-1) via a cutting line, and the right adhesive piece is bonded to the inner right side surface. On the outer left side surface, a portion of the outer left side surface is formed as a left adhesive piece (232-1), which is the area of ​​the outer left side surface other than the left adhesive piece, and is separable from the outer left side surface main body (230-1) via a cut line, and the left adhesive piece is adhered to the inner left side surface. A packaging box characterized in that, in order to remove the outer box portion, excluding the right and left adhesive pieces, from the inner box portion, the cut line between the right adhesive piece and the outer right side main body portion is broken, and the cut line between the left adhesive piece and the outer left side main body portion is also broken.

2. The packaging box according to claim 1, characterized in that the upper end of the right adhesive piece is located above the upper edge of the inner right side surface, the upper end of the left adhesive piece is located above the upper edge of the inner left side surface, the right adhesive piece protrudes upward from the upper edge of the inner right side surface, and the left adhesive piece protrudes upward from the upper edge of the inner left side surface.

3. The packaging box according to claim 1, characterized in that a pair of first cut lines (221K, 222K) are formed at intervals from the upper front corner and the upper back corner of the outer right side surface toward the lower edge of the outer right side surface, and a pair of second cut lines (231K, 232K) are formed at intervals from the upper front corner and the upper back corner of the outer left side surface toward the lower edge of the outer left side surface, and the cut line between the right adhesive piece and the outer right side surface body is broken by pulling outward the lower end of the first central region, which is the area between the pair of first cut lines, thereby breaking the first cut lines, and the cut line between the left adhesive piece and the outer left side surface body is broken by pulling outward the lower end of the second central region, which is the area between the pair of second cut lines, thereby breaking the second cut lines.

4. It is a packaging box, It has an inner box section (A') and an outer box section (B'), and the inner box section and the outer box section are each formed from a sheet-like blank. The inner box section is Bottom surface (50) and An inner sleeve-shaped portion (1') is erected from each side of the base and is approximately perpendicular to the base, and has an inner front portion (10), an inner right side portion (20), an inner left side portion (30), and an inner back portion (40), and when the inner box portion is assembled into a box shape, the inner sleeve-shaped portion is formed at approximately right angles to the other adjacent portions of the four surfaces: the inner front portion, the inner right side portion, the inner left side portion, and the inner back portion. At least three of the four upper flaps are provided: a front upper flap (110) connected via a fold line from the upper edge of the inner front portion and formed along the upper edge of the inner front portion; a right upper flap (120) connected via a fold line from the upper edge of the inner right side portion and formed along the upper edge of the inner right side portion; a left upper flap (130) connected via a fold line from the upper edge of the inner left side portion and formed along the upper edge of the inner left side portion; and a rear upper flap (140) connected via a fold line from the upper edge of the inner rear portion and formed along the upper edge of the inner rear portion. All of the top flaps in the at least three top flaps engage with at least one adjacent top flap, and in the top flaps that engage with each other, one top flap is provided with a first engaging portion (110P, 110Q, 140P, 140Q) that engages with the other top flap, and the other top flap is provided with a second engaging portion (120P, 120Q, 130P, 130Q) that engages with the first engaging portion of the first top flap. The outer box is, An outer sleeve-shaped portion (201') provided along the outer surface of the inner box portion, having an outer front portion (210) formed along the outer surface of the inner front portion, an outer right side portion (220) formed along the outer surface of the inner right side portion, an outer left side portion (230) formed along the outer surface of the inner left side portion, and an outer rear portion (240) formed along the outer surface of the inner rear portion, and in the state in which the outer box portion is assembled into a box shape, the outer sleeve-shaped portion has adjacent side portions that are at approximately right angles to each other, It has a lid portion (270, 280) connected via a folded line from the upper end of the outer sleeve-shaped portion, A first separation portion is bonded to the outer right side surface, and a first pivotable piece (228), which is a piece including the area on the outer right side surface to which the first separation portion is bonded, is formed to be rotatable with respect to the outer right side surface main body (229), which is the area on the outer right side surface other than the first pivotable piece; and a second separation portion is bonded to the outer left side surface, and a second pivotable piece (238), which is a piece including the area on the outer left side surface to which the second separation portion is bonded, is formed to be rotatable with respect to the outer left side surface main body (239), which is the area on the outer left side surface other than the second pivotable piece. A packaging box characterized in that, by rotating the first rotating piece outward, the cut line between the first separation piece and the inner right side main body is cut, and the first separation piece is separated from the inner box while being adhered to the first rotating piece; and by rotating the second rotating piece outward, the cut line between the second separation piece and the inner left side main body is cut, and the second separation piece is separated from the inner box while being adhered to the second rotating piece.

5. Four upper flaps are provided: a front upper flap (110), a right upper flap (120), a left upper flap (130), and a rear upper flap (140). Each of the upper flaps, the front upper flap, the rear upper flap, the right upper flap, and the left upper flap, engages with two adjacent upper flaps. The front upper flap has a first engaging portion (110P) for engaging with the left upper flap and a first engaging portion (110Q) for engaging with the right upper flap. The rear upper flap has a first engaging portion (140P) for engaging with the left upper flap and a first engaging portion (140Q) for engaging with the right upper flap. The upper right flap has a second engaging portion (120P) for engaging with the first engaging portion of the front upper flap and a second engaging portion (120Q) for engaging with the first engaging portion of the rear upper flap. The left upper flap has a second engaging portion (130P) for engaging with the first engaging portion of the front upper flap and a second engaging portion (130Q) for engaging with the first engaging portion of the rear upper flap. The packaging box according to claim 1, 2, 3, or 4, characterized in that, in the inner box portion from which the outer box portion excluding the right adhesive piece portion and the left adhesive piece portion has been removed, the first engaging portion of the front upper flap and the second engaging portion of the left upper flap are engaged, the first engaging portion of the front upper flap and the second engaging portion of the right upper flap are engaged, the first engaging portion of the rear upper flap and the second engaging portion of the left upper flap are engaged, and the first engaging portion of the rear upper flap and the second engaging portion of the right upper flap are engaged, thereby forming a frame shape in which the front upper flap, the right upper flap, the left upper flap, and the rear upper flap are folded inward relative to the sleeve-shaped portion.

6. In the front upper flap, a front left engaging portion (110P) for engaging with the left upper flap is provided in the left side end region of the front upper flap, and a front right engaging portion (110Q) for engaging with the right upper flap is provided in the right side end region of the front upper flap. In the rear upper flap, a rear left engaging portion (140P) is provided in the left side end region of the rear upper flap as a first engaging portion for engaging with the left upper flap, and a rear right engaging portion (140Q) is provided in the right side end region of the rear upper flap as a first engaging portion for engaging with the right upper flap. In the upper right side flap, a right front engaging portion (120P), which serves as a second engaging portion for engaging with the first engaging portion of the front upper side flap, is provided in the front end region of the upper right side flap, and a right rear engaging portion (120Q), which serves as a second engaging portion for engaging with the first engaging portion of the rear upper side flap, is provided in the rear end region of the upper right side flap. The packaging box according to claim 5, characterized in that, in the left upper flap, a left front engaging portion (130P) is provided in the front end region of the left upper flap as a second engaging portion for engaging with a first engaging portion of the front upper flap, and a left rear engaging portion (130Q) is provided in the rear end region of the left upper flap as a second engaging portion for engaging with a first engaging portion of the rear upper flap.

7. In a pair of engaging parts consisting of a first engaging part and a second engaging part that engage with each other, one of the engaging parts of the pair is designated as the A engaging part, and the other engaging part is designated as the B engaging part. The A engagement portion is connected via a broken line (C15, C16, C17, C18) from a first inclined edge, where the distance from the broken line between the sleeve-shaped portion and the A engagement portion decreases as it moves toward the B engagement portion, and has first protruding portions (124-1, 124-2, 134-1, 134-2) protruding from the first inclined edge, and second protruding portions (126-1, 126-2, 136-1, 136-2) protruding from the extension of the first inclined edge and adjacent to the first protruding portions via notches (121K, 122K, 131K, 132K), and the first protruding portions are provided at the end position on the B engagement portion side of the upper flap, which is closer to the second protruding portion. The B engaging portion has second inclined edges (112b, 112c, 142b, 142c) such that the distance from the fold line between it and the sleeve-shaped portion decreases as it moves towards the A engaging portion. When the A engaging portion is placed on top of the B engaging portion, the second projection overlaps the region along the second inclined edge (110-2, 110-4, 140-2, 140-4), and the first projection overlaps the end portion of the upper flap where the B engaging portion is provided. The packaging box according to claim 6, characterized in that by pressing the second projection while the first projection is superimposed on the second projection, the fold line at the base end of the first projection becomes a valley fold, and the second projection is positioned below the region along the second inclined edge, thereby engaging the first projection and the second projection.

8. Four upper flaps are provided: a front upper flap (110), a right upper flap (120), a left upper flap (130), and a rear upper flap (140). The front upper flap engages with only one of the upper right flap and the upper left flap, while the rear upper flap engages with only the other of the upper right flap and the upper left flap. The front upper flap has a first engaging portion (110P, 110Q) for engaging with one of the upper right flap and the upper left flap, and one of the upper right flap and the upper left flap has a second engaging portion (130P, 120P) for engaging with the first engaging portion of the front upper flap. The rear upper flap has a first engaging portion (140Q, 140P) for engaging with the other of the upper right flap and the upper left flap, and the other of the upper right flap and the upper left flap has a second engaging portion (120Q, 130Q) for engaging with the first engaging portion of the rear upper flap. In the inner box portion, where the outer box portion has been removed except for the right and left adhesive pieces, The packaging box according to claim 1, 2, 3, or 4, characterized in that the front top flap, the right top flap, the left top flap, and the rear top flap are formed in a frame shape with the sleeve-like portion folded inward, by engaging a second engaging portion on one of the upper right flap and the left top flap with a first engaging portion on the front top flap, and engaging a second engaging portion on the other of the upper right flap and the left top flap with a first engaging portion on the rear top flap.

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