Packaging box

Abstract

To provide a packaging box capable of accommodating contents while suppressing an increase in the assembly process and area of a blank material.SOLUTION: A packaging box includes: a peripheral wall portion having a front wall portion 3, a right wall portion 5 continuous with the front wall portion 3 via a first fold line F1, a left wall portion 6 continuous with the front wall portion 3 via a second fold line F2, and a rear wall portion 4 continuous with the right wall portion 5 or the left wall portion 6 via a third fold line F3; a deformation promoting portion 85 having a glued wall portion 7 that is continuous with the rear wall portion 4 via a fourth fold line F4 and is glued to an inside of the right wall portion 5 and a partition wall portion 8 that partitions the inside of the peripheral wall portion, with one end 81 being continuous with the glued wall portion 7 via a fifth fold line F5, and the other end 82 being a free end, and at least an upper end of the other end 82 abutting against the third fold line F3, for promoting deformation of the partition wall portion 8 so that a storage space narrows from a bottom to a top; and a contact portion 86 provided in an upper portion to contact an upper end of a storage object inserted into the storage space from below.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a packaging box made of a single blank material, which includes a peripheral wall portion having a rectangular cross section, a buffer space forming wall that divides the cross section in a diagonal direction inside the peripheral wall portion, a lid and a bottom flap extending from the upper edge and the lower edge of the peripheral wall portion, and a buffer space forming piece that forms a buffer space above and below the accommodation space with a part of the lid and the bottom flap. The packaging box of Patent Document 1 does not require protection by a buffer member such as a resin tray for accommodating easily damaged contents such as bottles by the buffer space forming wall or the buffer space forming piece.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the packaging box of Patent Document 1, a buffer space forming piece is required for the lid and / or the bottom flap, and at least the process of folding the buffer space forming piece increases in the assembly process of the packaging box.

[0005] An object of the present invention is to provide a packaging box capable of accommodating contents while suppressing an increase in the assembly process and the area of the blank material.

Means for Solving the Problems

[0006] The packaging box according to the present invention is A peripheral wall portion having a front wall portion, a right wall portion continuous with the front wall portion via a first fold line, a left wall portion continuous with the front wall portion via a second fold line, and a rear wall portion continuous with the right wall portion or the left wall portion via a third fold line. An adhesive wall portion that is continuous with the rear wall portion via a fourth fold line and is adhered inside one of the right wall portion or the left wall portion. A partition wall portion having one end continuous with the adhesive wall portion via a fifth fold line, the other end being a free end, and at least the upper end of the other end abutting against the third fold line to partition the inside of the peripheral wall portion between the rear wall portion and the front wall portion. An accommodation space in which contents are accommodated between the partition wall portion and one of the front wall portion or the rear wall portion. A non-accommodation space in which the contents are not accommodated between the partition wall portion and the other of the front wall portion or the rear wall portion. The partition wall portion includes a deformation promoting portion that promotes deformation of the partition wall portion so that the accommodation space between the partition wall portion and the rear wall portion narrows from bottom to top, and a contact portion provided on an upper side portion to contact the upper end of the contents inserted into the accommodation space from below. A packaging box comprising the above.

[0007] According to the present invention, a partition wall can be used to provide an accommodation space and a non-accommodation space in which contents are not accommodated. Therefore, the non-accommodation space can be used as a buffer space, and the displacement of the contents in the peripheral wall direction, which is smaller than the inner region of the peripheral wall portion, can be suppressed while reducing packaging members. Since the accommodation space narrows from bottom to top, it is easy to suppress the upward escape of the contents inserted from below.

[0008] Since the partition wall portion is provided with a contact portion against which the upper end of the contents abuts, it is easier to more reliably suppress the upward escape of the contents. In addition, a buffer space can be provided above the contact portion, for example, without requiring a buffer space forming piece for forming an upper buffer space in the upper flap portion. Thereby, reduction of the buffer space forming piece and reduction of the process of folding or pasting the buffer space forming piece can be achieved.

Effects of the Invention

[0009] According to the present invention, it is possible to provide a packaging box capable of accommodating contents while suppressing an increase in the assembly process and the area of the blank material.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0012] In the description of the following embodiments, terms indicating directions such as "up", "down", "left", "right", "front", "back", "height", "width", "front and back", etc. shall refer to the directions when the assembled and sealed packaging box is viewed from the front side, unless otherwise specified. Also, in this specification, when simply referring to "outside" or "inside", these terms mean the "outside" or "inside" of the packaging box.

[0013] As shown in FIGS. 1 and 2, the packaging box 1 according to the embodiment of the present invention includes a rectangular tube-shaped peripheral wall portion 2 extending in the vertical direction and having openings 21 and 22 at both ends, three upper flaps 11, 12, and 13 connected to the upper end of the peripheral wall portion 2, three lower flaps 14, 15 (see FIG. 3), and 16 connected to the lower end of the peripheral wall portion 2, an adhesive wall portion 7 adhered to the inside of the peripheral wall portion 2, and a partition wall portion 8 partitioning the inside of the peripheral wall portion 2.

[0014] The peripheral wall portion 2 has a front wall portion 3, a rear wall portion 4 facing the back side of the front wall portion 3 in the front-rear direction, a right wall portion 5 and a left wall portion 6 facing each other in the lateral direction and connecting the front wall portion 3 and the rear wall portion 4, respectively. The right wall portion 5 is continuous with the front wall portion 3 via a first fold line F1. The left wall portion 6 is continuous with the front wall portion 3 via a second fold line F2. The rear wall portion 4 is continuous with the left wall portion 6 via a third fold line F3.

[0015] The front wall portion 3 and the rear wall portion 4 are arranged parallel to each other and have the same width in the lateral direction. The right wall portion 5 and the left wall portion 6 are arranged parallel to each other and have the same width in the front-rear direction. The width of the right wall portion 5 and the left wall portion 6 in the front-rear direction is smaller than the width of the front wall portion 3 and the rear wall portion 4 in the lateral direction.

[0016] As shown in FIG. 1, the front wall portion 3, the right wall portion 5, and the left wall portion 6 have a trigger portion T1 when the packaging box 1 is broken and opened. The trigger portion T1 is the front wall cut line 31, the right wall cut line 51 (see FIG. 3), and the left wall cut line 61. The front wall cut line 31 is located above the middle portion in the vertical direction of the front wall portion 3 and extends in the width direction. The left wall cut line 61 slopes upward from the left end of the front wall cut line 31 toward the rear and extends to the rear end portion at the upper edge of the left wall portion 6. The right wall cut line 51, although not shown, slopes upward from the right end of the front wall cut line 31 toward the rear in the same manner as the left wall cut line 61 and extends to the rear end portion at the upper edge of the right wall portion 5.

[0017] The right wall portion 5 and the left wall portion 6 each have a crush promotion portion T2 for facilitating the crushing of the opened packaging box 1. The crush promotion portion T2 has an upper crush promotion portion T21 located in the upper portion 1c of the packaging box 1 (the portion above the trigger portion T1) and a lower crush promotion portion T22 located in the lower portion 1d (the portion below the trigger portion T1).

[0018] The upper crush promotion portion T21 is located above the right wall cut line 51 and the left wall cut line 61 and is a cut line that slopes downward as it extends rearward from the front end portions at the upper edges of the right wall portion 5 and the left wall portion 6. The upper crush promotion portion T21 of the right wall portion 5 is shown in FIG. 3.

[0019] The lower crush promotion portion T22 is located below the right wall cut line 51 and the left wall cut line 61 and is a concave portion that extends in the vertical direction. In this embodiment, the concave portion is composed of a groove-shaped ruled line formed by embossing.

[0020] As shown in FIGS. 1 and 2, the upper flaps 11, 12, 13 include a main flap 11 continuous with the upper end of the rear wall portion 4, and right and left side flaps 12, 13 continuous with the upper ends of the right and left wall portions 5, 6, respectively. The main flap 11 has an upper insertion piece 11a inserted inside the peripheral wall portion 2. When the main flap 11 is folded over from above the side flaps 12, 13 folded toward the inside of the peripheral wall portion 2 and the upper insertion piece 11a is inserted inside the front wall portion 3, the upper opening 21 above the peripheral wall portion 2 is sealed. The main flap 11 constitutes the upper surface portion 1a of the packaging box 1.

[0021] The lower flaps 14, 15, 16 include a main flap 14 continuous with the lower end of the front wall portion 3, and right and left side flaps 15, 16 continuous with the lower ends of the right and left wall portions 5, 6, respectively. The main flap 14 has a lower insertion piece 14a inserted inside the peripheral wall portion 2. When the main flap 14 is folded over from below the side flaps 14, 15 folded toward the inside of the peripheral wall portion 2 and the lower insertion piece 14a is inserted inside the rear wall portion 4, the lower opening 22 below the peripheral wall portion 2 is sealed. The main flap 14 constitutes the lower surface portion 1b of the packaging box 1.

[0022] As shown in FIGS. 2 and 3, the adhesive wall portion 7 is continuous with the rear wall portion 4 via the fourth fold line F4, and the partition wall portion 8 is continuous with the adhesive wall portion 7 via the fifth fold line F5. The adhesive wall portion 7 is adhered to the inside of the right wall portion 5. The adhesive wall portion 7 is fixed to a region from the rear edge portion 52 of the right wall portion 5 to the middle portion of the longitudinal width of the right wall portion 5 in the front-rear direction. The longitudinal width of the adhesive wall portion 7 is smaller than the longitudinal widths of the right and left wall portions 5, 6. The longitudinal width of the adhesive wall portion 7 is approximately half of the longitudinal widths of the right and left wall portions 5, 6.

[0023] The vertical height of the adhesive wall portion 7 generally coincides with the vertical height of the peripheral wall portion 2. The lower end portion 71 of the adhesive wall portion 7 is inclined so as to be positioned upward from the fourth fold line F4 toward the fifth fold line F5.

[0024] At the upper part of the pasting wall portion 7, at the portion corresponding to the right wall cut line 51, an adhesion wall cut line 74 is provided to separate the pasting wall portion 7 so as not to inhibit the breakage of the trigger portion T1.

[0025] As shown in FIG. 3, the partition wall portion 8 is continuous with the pasting wall portion 7 via the fifth fold line F5. The width of the partition wall portion 8 is larger than the lateral width of the rear wall portion 4. The width of the partition wall portion 8 generally coincides with the sum of the lateral width of the rear wall portion 4 and the longitudinal length of the pasting wall portion 7 in the front-rear direction. The vertical height of the partition wall portion 8 is lower than that of the peripheral wall portion 2. The upper edge portion 83 of the partition wall portion 8 is located below the upper edge of the peripheral wall portion 2, and the lower edge portion 84 is located above the lower edge of the peripheral wall portion 2.

[0026] On the right side portion in the width direction of the upper edge portion 83, a tongue piece portion 83a protruding upward is provided. The lower edge portion 84 has an inclined portion 84a that inclines upward as it goes from the middle portion in the width direction toward the left side (the other end portion 82), and a notch portion 84b in which the lower edge portion 84 is notched so as to be recessed upward as it goes from the middle portion toward the right side (one end portion 81). The middle portion of the lower edge portion 84 bulges downward.

[0027] As shown in FIG. 4, one end portion 81 of the partition wall portion 8 is continuous with the pasting wall portion 7, and the other end portion 82 on the side opposite to the one end portion 81 is a free end. The partition wall portion 8 is located between the front wall portion 3 and the rear wall portion 4 and partitions the inside of the peripheral wall portion 2. By the partition wall portion 8, a storage space S1 for storing the contents 9 is formed between the partition wall portion 8 and the rear wall portion 4, and a non-storage space S2 in which the contents 9 are not stored is formed between the partition wall portion 8 and the front wall portion 3.

[0028] The partition wall portion 8 extends while curving from the fifth fold line F5 toward the third fold line F3. The partition wall portion 8 extends from the middle portion in the front-rear direction of the right wall portion 5 toward the left wall portion 6 side. At least the upper portion of the other end portion 82 of the partition wall portion 8 is in contact with the third fold line F3. Since the partition wall portion 8 is larger than the lateral width of the rear wall portion 4, it curves so as to bulge toward the second fold line F2 between the fifth fold line F5 and the third fold line F3. In other words, the partition wall portion 8 curves so as to be convex in the direction away from the rear wall portion 4 as a whole.

[0029] As shown in FIGS. 2 and 3, the partition wall portion 8 has a deformation promoting portion 85 that promotes deformation of the partition wall portion 8 so that the accommodation space S1 narrows from below upward, and a contact portion 86 provided on the upper portion to contact the upper end of the accommodation object 9 inserted into the accommodation space S1 from below.

[0030] The deformation promoting portion 85 is a deformation promoting fold line F7 formed on the partition wall portion 8. The deformation promoting fold line F7 is inclined so as to be located on the left side as it goes downward from the right end portion at the upper edge of the partition wall portion 8. The deformation promoting fold line F7 is inclined so as to be away from the fifth fold line F5 as it goes from above downward.

[0031] As shown in FIG. 3, the lower end portion F71 of the deformation promoting fold line F7 is located at the middle portion in the left-right direction at the lower edge portion of the partition wall portion 8. The upper end F72 of the deformation promoting fold line F7 is located in the vicinity of the fifth fold line F5 at the upper edge portion 83 of the partition wall portion 8. The angle α formed by the deformation promoting fold line F7 and the fifth fold line F5 may be set to be 15 degrees or more and 25 degrees or less, and is set to 17 degrees in the present embodiment. The partition wall portion 8 has a right region 8a located on the right side (one end portion 81 side) of the deformation promoting fold line F7 and a left region 8b located on the left side (the other end portion 82 side).

[0032] As shown in FIGS. 3 and 4, the accommodation space S1 is surrounded by the rear wall portion 4, the pasted wall portion 7, the right region 8a, and the left region 8b. Due to the inclination of the deformation promoting fold line F7, the width of the right region 8a widens from top to bottom, the width of the left region 8b narrows from top to bottom, and the lateral width dimension of the right region 8a and the lateral width dimension of the left region 8b approach each other as they go downward.

[0033] As shown in FIGS. 3 and 5, the contact portion 86 is provided on the partition wall portion 8 and is formed by a locking piece extending downward from the upper edge portion 87a of the opening 87 that communicates the accommodation space S1 and the non-accommodation space S2. The opening 87 is located in the central portion in the left-right direction in the upper portion of the partition wall portion 8. The lower edge portion 87b of the opening 87 is provided at a position corresponding to the front wall cut line 31. The height from the lower surface portion 1b of the upper edge portion 87a substantially coincides with the height of the accommodation object 9. Since the locking piece 86 is located below the upper surface portion 1a, a buffer space is formed between the locking piece 86 and the upper surface portion 1a.

[0034] The upper edge portion 87a is provided with a cut line C1 for facilitating the projection of the locking piece 86 to the accommodation space S1 side more than the partition wall portion 8 where the locking piece 86 is curved. The cut line C1 extends along the upper edge portion 87a in the width direction of the partition wall portion 8. The cut line C1 has an extended cut line C2 that extends to the fifth fold line F5 from the upper edge portion 87a.

[0035] The procedure for assembling the packaging box 1 will be described with reference to FIGS. 3 and 6 to 8.

[0036] The packaging box 1 is a paper carton assembled by folding a blank sheet 10 made of cardboard as shown in FIG. 3. Note that FIG. 3 is a plan view of the blank sheet 10 with each part 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16 constituting the packaging box 1 viewed from the outside.

[0037] In the blank sheet 10 shown in FIG. 3, in order from the left side in FIG. 3, the partition wall portion 8, the pasting wall portion 7, the rear wall portion 4, the left wall portion 6, the front wall portion 3, and the right wall portion 5 are provided in series via concave fold lines F1 to F5 extending in the height direction.

[0038] First, as shown in FIG. 6, the fifth fold line F5 is mountain-folded so that the inner surface of the partition wall portion 8 faces the inner surfaces of the rear wall portion 4 and the pasting wall portion 7. Next, as shown in FIG. 7, the third fold line F3 is mountain-folded so that the outer surface of the partition wall portion 8 faces the inner surface of the left wall portion 6. Then, as shown in FIG. 8, glue is applied to the outer surface of the pasting wall portion 7, and the first fold line F1 is mountain-folded to fix the inner surface of the right wall portion 5 to the outer surface of the pasting wall portion 7, thereby obtaining the packaging box 1 in a flat state as shown in FIG. 9.

[0039] The process of deforming the flat packaging box into a three-dimensional shape will be described with reference to FIGS. 4, 5, and 9.

[0040] As shown in FIG. 9, in the flat state, by pressing the first fold line F1 and the third fold line F3, the packaging box 1 is deformed into a three-dimensional shape. When the first fold line F1 and the third fold line F3 are pressed, the partition wall portion 8 compressed between the third fold line F3 and the fifth fold line F5 is curved and deformed along the deformation promoting fold line F7. As a result, as shown in FIG. 4, the partition wall portion 8 forms the accommodation space S1 and the non-accommodation space S2.

[0041] As shown in FIG. 5, when the partition wall portion 8 is curved and deformed, the locking piece 86 tries to remain in its original position without following the deformation. In other words, since the lower part of the partition wall portion 8 is curved and deformed so as to bulge forward (toward the non-accommodation space S2 side) more than the upper part, the locking piece 86 is located on the accommodation space S1 side. The locking piece 86 is in an inclined state such that the lower edge is located on the accommodation space S1 side rather than the upper edge.

[0042] The process of accommodating the contents 9 in the packaging box 1 will be described with reference to FIGS. 4 and 10.

[0043] As shown in FIG. 10, the container 9 is inserted into the packaging box 1 from the lower opening 22. When the container 9 is inserted, since the other end portion 82 of the partition wall portion 8 is a free end, the lower end portion of the other end portion 82 slides along the left wall portion 6 toward the front side (upper side in FIG. 10) by the container 9 (arrow A), and the lower storage space S1 expands. The other end portion 82 slides until the lower end portion F71 of the deformation promoting fold line F7 abuts against the front wall portion 3.

[0044] The lower end portion F71 is located at the middle portion in the left - right direction of the front wall portion 3, and the corner portion 88 between the other end portion 82 and the upper edge portion 83 abuts against the third fold line F3. Since the other end portion 82 is slid by the container 9, the lower storage space S1 is surrounded by the rear wall portion 4, the adhesive wall portion 7, the right - hand region 8a, the left - hand region 8b, and the left wall portion 6 between the other end portion 82 and the rear wall portion 4.

[0045] The other end portion 82 is inclined so as to be positioned forward downward from the corner portion 88. In other words, since the region of the left wall portion 6 of the storage space S1 becomes narrower from the lower side to the upper side, the storage space S1 narrows from the lower storage space S1 toward the upper storage space S1, and the container 9 is suppressed from coming out upward.

[0046] The container 9 inserted from below has its upper end abut against the lower edge of the locking piece 86, and thereby while deforming the locking piece 86 toward the storage space S1 side by the cut line C1, it further moves upward. When the upper end of the container 9 that has moved upward abuts against the upper edge portion (cut line C1) of the opening, the container 9 is stored in the packaging box 1. Thereafter, when the upper and lower flaps are closed, the container is packed in the packaging box 1.

[0047] Referring to FIG. 11, the process of opening the packaging box 1 will be described.

[0048] As shown in FIG. 11, by pressing the front wall cut line 31 (trigger part T1) and lifting it upward, the trigger part T1 breaks, and the upper part 1c of the packaging box 1 is opened. When the upper part 1c of the packaging box 1 is opened, the contents 9 or the opening 87 of the partition wall part 8 is exposed. At this time, since the upper end part of the contents 9 abuts against the locking piece 86, even when the upper part 1c of the packaging box 1 is opened, it is suppressed from coming out upward. Thereafter, by separating the tongue piece part 83a from the partition wall part 8 along the extended cut line C2, the locking piece 86 continuous below the tongue piece part 83a is separated, and the contents 9 can be taken out from the accommodation space S1.

[0049] While referring to FIG. 12, the process of crushing the packaging box 1 into a flat shape will be described.

[0050] As shown in FIG. 12, the upper part 1c of the packaging box 1 is crushed so that the right wall part 5 and the left wall part 6 bulge outward along the upper crushing promotion part T21 of the right wall part 5 and the left wall part 6. The lower part 1d of the packaging box 1 is crushed so as to bulge outward as a whole along the lower crushing promotion part T22 of the right wall part 5 and the left wall part 6.

[0051] As shown in FIGS. 2 and 3, the lower end parts of the right wall part 5 and the left wall part 6 may be folded inward by a side part bending promotion part T23 formed by an inverted V-shaped groove part provided at the lower end parts of the right wall part 5 and the left wall part 6 and a flap bending promotion part T24 formed by a cut line extending in the left-right direction provided on the lower side flaps 15, 16. The lower surface part 1b may be crushed so as to bulge downward by a flap bending promotion part T25 formed by a groove part extending in the left-right direction provided on the lower main flap 14. In the present embodiment, the groove part is a groove-shaped ruled line formed by die pressing.

[0052] Each of the crushing promotion parts T22 and each of the bending promotion parts T23, T24, T25 provided on the left and right wall parts 5, 6 and the lower main flap 14 may adopt a structure described in, for example, JP-A-2018-016324 or the like.

[0053] According to the packaging box 1 according to this embodiment, the following effects can be achieved.

[0054] A peripheral wall portion 2 having a front wall portion 3, a right wall portion 5 continuous with the front wall portion 3 via a first fold line F1, a left wall portion 6 continuous with the front wall portion 3 via a second fold line F2, and a rear wall portion 4 continuous with the left wall portion 6 via a third fold line F3; An adhesive wall portion 7 that is continuous with the rear wall portion 4 via a fourth fold line F4 and is adhered to the inside of the right wall portion 5; A partition wall portion 8 having one end portion 81 continuous with the adhesive wall portion 7 via a fifth fold line F5, the other end portion 82 being a free end, and at least the upper end of the other end portion 82 abutting against the third fold line F3 to partition the inside of the peripheral wall portion 2 between the rear wall portion 4 and the front wall portion 3; An accommodation space S1 for accommodating the contents 9 between the partition wall portion 8 and one of the front wall portion 3 or the rear wall portion 4; A non-accommodation space S2 in which the contents 9 are not accommodated between the partition wall portion 8 and the other of the front wall portion 3 or the rear wall portion 4, and having, The partition wall portion 8 includes a deformation promoting portion 85 that promotes deformation of the partition wall portion 8 so that the accommodation space S1 between the partition wall portion 8 and the front wall portion 3 or the rear wall portion 4 narrows from bottom to top, and an abutting portion 86 provided on the upper portion of the partition wall portion 8 to abut against the upper end of the contents 9 inserted into the accommodation space S1 from below. The packaging box 1 provided with.

[0055] According to the present invention, the partition wall 8 can provide an accommodation space S1 and a non-accommodation space S2 in which the contents 9 are not accommodated. Therefore, the non-accommodation space S2 can be used as a buffer space, and the displacement of the contents in the circumferential direction, which is smaller than the inner region of the peripheral wall portion 2, can be suppressed while reducing the packaging members. Since the accommodation space S1 narrows from bottom to top, it is easy to suppress the upward escape of the contents inserted from below.

[0056] Since the partition wall portion 8 is provided with an abutting portion 86 against which the upper end of the contained item 9 abuts, it is easier to more reliably prevent the contained item 9 from coming out upward. Further, a buffer space can be provided above the abutting portion 86. For example, the upper flap 11 does not require a buffer space forming piece for forming an upper buffer space. As a result, it is possible to reduce the buffer space forming piece and the process of folding or pasting the buffer space forming piece.

[0057] The partition wall portion 8 has an opening 87 that penetrates the storage space S1 and the non-storage space S2. The abutting portion 86 is formed by the upper edge portion 87a of the opening 87.

[0058] According to this configuration, since the storage space S1 becomes narrower from bottom to top, the partition wall portion 8 is located toward the front wall portion 3 side or the rear wall portion 4 side upward. As a result, a shift occurs between the lower edge portion 87b and the upper edge portion 87a of the opening 87, and the position of the upper edge portion 87a in the front-rear direction is located inside the storage space S1 compared to the position of the lower edge portion 87b in the front-rear direction. Thereby, the upper end of the contained item 9 inserted from below abuts against the upper edge portion 87a, restricting the upward movement of the contained item 9, and the upper edge portion 87a functions as the abutting portion 86.

[0059] A locking piece 86 extending downward is continuously provided on the upper edge portion 87a of the opening 87. A cut line C1 is provided between the upper edge portion 87a and the locking piece 86 to facilitate protruding the locking piece 86 toward the storage space S1 side.

[0060] According to this configuration, by providing the locking piece 86 protruding toward the storage space S1 side, the upper end of the contained item 9 inserted from below can be received by a surface, so that it is possible to more effectively prevent the contained item 9 from coming out upward.

[0061] The deformation promoting portion 85 is a deformation promoting fold line F7 that curves and deforms the partition wall portion 8 so as to be convex in a direction away from the rear wall portion 4.

[0062] According to this configuration, when the partition wall portion 8 bends, since the lower portion tends to expand more than the upper portion, the upper portion is maintained inside the accommodation space S1 with respect to the lower portion. As a result, particularly when the contact portion 86 is formed by the upper edge portion 87a of the opening portion 87 or the locking piece 86, it is easy to position the upper edge portion 87a or the locking piece 86 located in the upper portion inside the accommodation space S1, and it is easy to bring the upper end portion of the accommodation object 9 inserted from below into contact with the contact portion 86.

[0063] The folding line F7 for promoting deformation inclines so as to move away from the fifth folding line F5 from above to below.

[0064] According to this configuration, the folding line F7 for promoting deformation can form the accommodation space S1 that becomes narrower from below to above.

[0065] The angle α formed by the folding line F7 for promoting deformation and the fifth folding line F5 is set to be 15 degrees or more and 25 degrees or less.

[0066] According to this configuration, since the angle α formed by the folding line F7 for promoting deformation and the fifth folding line F5 can be appropriately set, it is easy to stably accommodate the accommodation object 9. As shown in FIG. 13(a), when α exceeds 25 degrees (α1), the lower end portion F71 of the folding line F7 after accommodating the accommodation object 9 biases toward the second folding line F2 side, so that it is difficult to form a buffer space between the left region 8b of the partition wall 8 and the left wall portion 6, and since the accommodation space S1 expands too much, it is difficult to stably accommodate the accommodation object 9. As shown in FIG. 13(b), when α is less than 15 degrees (α2), the lower end portion F71 of the folding line F7 after accommodating the accommodation object 9 biases toward the first folding line F1 side, so that it is difficult to form a buffer space between the right region 8a of the partition wall 8 and the right wall portion 5, and since the accommodation space S1 expands too much, it is difficult to stably accommodate the accommodation object 9.

[0067] The lower edge portion 84 of the partition wall portion 8 has a notch portion 84b that inclines upward from the folding line F7 for promoting deformation toward the fifth folding line F5.

[0068] According to this configuration, since the lower edge portion 84 is notched by the notch portion 84b, it is easy to suppress the insertion of the contents 9 from being obstructed by the lower edge portion 84 when inserting the contents 9 from below.

[0069] Note that the packaging box 1 of the present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible.

[0070] In this embodiment, an example in which the contact portion 86 is configured by a locking piece has been described, but the present invention is not limited thereto, and the contact portion may be configured by the upper edge portion 87a of the opening portion 87.

[0071] In this embodiment, an example in which the tongue piece portion 83a is provided has been described, but the present invention is not limited thereto, and it is sufficient to have a configuration in which the locking piece 86 is cut off without providing the tongue piece portion 83a.

[0072] In this embodiment, an example in which the rear wall portion 4 is continuous with the left wall portion 6 has been described, but the present invention is not limited thereto, and the rear wall portion 4 may be continuous with the right wall portion 5. In this case, the pasting wall portion 7 may be fixed to the left wall portion 6.

[0073] In this embodiment, an example in which a buffer space is provided on the upper part and the front wall portion 3 side has been described, but the present invention is not limited thereto. For example, a buffer space piece for providing a buffer space may be provided on the lower flap 14, and in this case, a cutout portion for cutting out the buffer space piece may be provided on the right or left wall portion 5, 6 when crushing after opening.

[0074] [Appendix] The present invention includes the following aspects.

[0075] [Aspect 1] A peripheral wall portion having a front wall portion, a right wall portion continuous with the front wall portion via a first fold line, a left wall portion continuous with the front wall portion via a second fold line, and a rear wall portion continuous with the right wall portion or the left wall portion via a third fold line; A pasting wall portion that is continuous with the rear wall portion via a fourth fold line and is pasted inside one of the right wall portion or the left wall portion; One end is continuous with the pasting wall portion via a fifth fold line, the other end is a free end, and at least the upper end of the other end abuts against the third fold line, partitioning the inside of the peripheral wall portion between the rear wall portion and the front wall portion, a partition wall portion; An accommodation space in which the contents are accommodated between the partition wall portion and one of the front wall portion or the rear wall portion; A non-accommodation space in which the contents are not accommodated between the partition wall portion and the other of the front wall portion or the rear wall portion, having; The partition wall portion includes a deformation promoting portion that promotes deformation of the partition wall portion so that the accommodation space between the partition wall portion and the rear wall portion narrows from bottom to top, and an abutting portion provided on the upper side to abut against the upper end of the contents inserted into the accommodation space from below; A packing box comprising.

[0076] [Aspect 2] The partition wall portion has an opening penetrating through the accommodation space and the non-accommodation space where the contents are not accommodated; The abutting portion is formed by the upper edge portion of the opening The packing box according to Aspect 1.

[0077] [Aspect 3] Locking pieces extending downward are continuously provided on the upper edge portion of the opening; The abutting portion is formed by the locking piece; A cut line for protruding the locking piece toward the accommodation space side is provided between the upper edge portion and the locking piece The packing box according to Aspect 2.

[0078] [Aspect 4] The deformation promoting portion is a deformation promoting fold line that curves the partition wall portion so as to be convex in a direction away from the rear wall portion as a whole; The packing box according to any one of Aspects 1 to 3.

[0079] [Aspect 5] The deformation promoting fold line is inclined so as to be away from the fifth fold line from top to bottom The packaging box according to Aspect 4.

[0080] [Aspect 6] The angle α formed by the deformation - promoting fold line and the fifth fold line is set to be 15 degrees or more and 25 degrees or less. The packaging box according to Aspect 4 or 5.

[0081] [Aspect 7] The lower edge portion of the partition wall portion has a notch portion that slopes upward from the deformation - promoting fold line toward the fifth fold line. The packaging box according to Aspect 5 or 6.

Explanation of Reference Numerals

[0082] 1 Packaging box 2 Peripheral wall portion 3 Front wall portion 4 Rear wall portion 5 Right wall portion 6 Left wall portion 7 Adhesive wall portion 8 Partition wall portion 10 Blank sheet 84b Notch portion 85 Deformation - promoting portion 86 Contact portion (locking piece) 87 Opening 87a Upper edge portion C1 Cut line F1~F5 Fold lines F7 Deformation - promoting fold line S1 Accommodation space S2 Non - accommodation space α Angle

Claims

1. A peripheral wall portion having a front wall portion, a right wall portion continuous with the front wall portion via a first fold line, a left wall portion continuous with the front wall portion via a second fold line, and a rear wall portion continuous with the right wall portion or the left wall portion via a third fold line; An adhesive wall portion that is continuous with the rear wall portion via a fourth fold line and is adhered inside one of the right wall portion or the left wall portion; A partition wall portion having one end continuous with the adhesive wall portion via a fifth fold line, the other end being a free end, and at least the upper end of the other end abutting against the third fold line to partition the inside of the peripheral wall portion between the rear wall portion and the front wall portion; A storage space in which contents are stored between the partition wall portion and one of the front wall portion or the rear wall portion; A non-storage space in which the contents are not stored between the partition wall portion and the other of the front wall portion or the rear wall portion; and The partition wall portion includes a deformation promoting portion that promotes deformation of the partition wall portion so that the storage space between the partition wall portion and the rear wall portion narrows from bottom to top, and a contact portion provided at an upper portion to abut against the upper end of the contents inserted into the storage space from below. A packaging box comprising the above.

2. The partition wall portion has an opening that penetrates between the storage space and the non-storage space where the contents are not stored, The contact portion is formed by an upper edge portion of the opening. The packaging box according to Claim 1.

3. Locking pieces extending downward are continuously provided at the upper edge portion of the opening. The contact portion is formed by the locking pieces. A cut line is provided between the upper edge portion and the locking pieces to project the locking pieces toward the storage space side. The packaging box according to Claim 2.

4. The deformation promoting portion is a deformation promoting fold line that curves and deforms the partition wall portion to be convex in a direction away from the rear wall portion as a whole. The packaging box according to any one of Claims 1 to 3.

5. The deformation promoting fold line is inclined so as to be away from the fifth fold line from top to bottom. The packaging box according to Claim 4.

6. An angle α formed between the deformation promoting fold line and the fifth fold line is set to be 15 degrees or more and 25 degrees or less. The packaging box according to Claim 4.

7. The lower edge portion of the partition wall portion has a notch that slopes upward from the deformation promoting fold line toward the fifth fold line. The packaging box according to Claim 5 or 6.

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