Cardboard packaging boxes, blanks, and intermediate packaging boxes

Abstract

To provide a ball packaging box capable of storing a plurality of kinds of balls whose diameters are different from each other, and to provide a blank and a packaging box intermediate body thereof.SOLUTION: An angle α formed by a first front flap 22 and a second front flap 23 in a ball packaging box is an obtuse angle. It is so constituted that a first state where the second front flap 23 is along a bottom face of the packaging box, and a second state where the second front flap 23 is inclined in such a manner that a tip side 23a of the second front flap 23 is directed forward, according to the angle α formed by the first front flap 22 and the second front flap 23 as being the obtuse angle can be switched by changing a folding angle of the second front flap 23 with a ruled line.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present invention relates to a cardboard packaging box, a blank, and a packaging box intermediate. [Background technology]

[0002] Ball packaging boxes used to display balls for sale are known (see, for example, Patent Document 1). Balls for ball games include, for example, basketballs and soccer balls. The ball packaging box has a box shape assembled from a single blank and has openings on the front and back. The balls contained in the ball packaging box can be seen through these openings. Displaying the balls contained in the ball packaging box prevents the balls from rolling, allowing for stable display of the balls. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3969626 Summary of the Invention [Problem to be solved by the invention]

[0004] The ball packaging box of Patent Document 1 has flaps arranged inside the box to support the bottom of the ball. The flaps are raised from the bottom of the box at the part that comes into contact with the ball, and are elastically deformable slightly toward the bottom. Therefore, the height of the flaps changes depending on the diameter of the balls to be stored. This allows balls of slightly different diameters, such as a ball that is fully inflated and a ball that is under-inflated, to be stably held inside the box.

[0005] However, in a ball packaging box assembled from a single blank, the flap cannot be configured with a complex mechanism, and the range of change in flap height is therefore small. Therefore, the range of ball diameters that can be accommodated is narrow. Therefore, there is a demand for a ball packaging box that can accommodate multiple types of balls with larger diameter differences, such as balls of different sizes. [Means for solving the problem]

[0006] Various aspects of a cardboard packaging box, a blank, and a packaging box intermediate for solving the above problems will be described below. [Mode 1] A packaging box for balls, comprising four main walls: a top wall, a bottom wall, a right wall, and a left wall, and configured to accommodate balls in a space surrounded by these main walls. The packaging box comprises a front wall rising from the front end of the bottom wall, a first front flap extending from the upper end of the front wall toward the bottom surface of the packaging box, and a second front flap connected to the rear end of the first front flap via a valley-folded crease. The packaging box is configured so that, by changing the folding angle of the second front flap along the crease, it can be switched between a first state in which the angle between the first front flap and the second front flap is an obtuse angle and the second front flap is aligned with the bottom surface, and a second state in which the angle between the first front flap and the second front flap is an acute angle and the second front flap is inclined so that the leading edge of the second front flap faces forward.

[0007] According to the above configuration, the support position of the balls in the ball packaging box can be changed by changing the folding angle of the second front flap, which allows a plurality of types of balls with different diameters to be accommodated in a ball packaging box assembled from a common blank.

[0008] [Aspect 2] The ball packaging box according to [Aspect 1], wherein the tip edge of the second front flap includes an arc-shaped portion that protrudes toward the crease. According to the above configuration, the tip edge easily fits along the ball, so that the second front flap can stably support the ball.

[0009] [Aspect 3] The ball packaging box according to [Aspect 1] or [Aspect 2], which is provided with a regulating piece that regulates the change in angle of the second front flap relative to the first front flap in the second state. According to the above configuration, the angle of the second front flap is stable, and therefore the ball can be stably supported by the second front flap.

[0010] [Aspect 4] The ball packaging box according to [Aspect 3], further comprising a side end piece connected to the side end of the second front flap, wherein at least one of the right wall and the left wall is a target main wall, the regulating piece is provided for each target main wall, connected to the front end of the target main wall, and is bent inward of the ball packaging box, and in the second state, the regulating piece sandwiches the side end piece between the target main wall and the regulating piece. According to the above configuration, the restricting piece can accurately restrict the change in angle of the second front flap relative to the first front flap.

[0011] [Aspect 5] A ball packaging box according to any one of [Aspect 1] to [Aspect 4], wherein at least one of the four main walls is a target main wall, and the ball packaging box is provided with a rear flap that constitutes the rear surface of the ball packaging box and is provided for each of the target main walls, the rear flap having a base end connected to the rear end of the target main wall, and a folding piece connected to a tip end of the rear flap, the folding piece being configured to be bent toward the back side of the rear flap.

[0012] With this configuration, the support position of the ball on the rear surface can be changed by bending or not bending the folding piece, which allows for a wider range of ball diameters to be accommodated compared to when the diameter of the ball that can be accommodated is changed only by changing the folding angle of the second front flap.

[0013] [Aspect 6] The ball packaging box according to [Aspect 5], wherein at least one of the leading edge of the rear flap and the leading edge of the folded piece includes an arc-shaped portion that protrudes toward the target main wall. According to the above configuration, the leading edge easily fits the ball, so that the ball can be stably supported by the rear flap or the bent edge.

[0014] [Aspect 7] A ball packaging box according to any one of [Aspect 1] to [Aspect 6], wherein the ball packaging box comprises rear flaps that form the rear surface thereof, four rear flaps connected one to each of the four main walls, both ends of each rear flap being engaged with the other rear flaps, and the four rear flaps include a rear flap that includes an area that indicates a support position by a user when releasing the engagement and opening the ball packaging box.

[0015] According to the above configuration, the user can easily grasp the position where the ball packaging box should be held when opening it, which makes it possible to easily open the ball packaging box and improves user convenience.

[0016] [Embodiment 8] A blank for manufacturing a ball packaging box, comprising: an upper wall, a lower wall, a right wall, and a left wall connected in a line; a front wall connected to the lower wall so as to be able to rise upward from the front end of the lower wall; a first front flap connected to the front wall on the opposite side from the lower wall, the first front flap configured to be bendable along a crease between the front wall and the first front flap so as to extend from the upper end of the front wall toward the bottom surface of the ball packaging box; and a second front flap connected to the first front flap on the opposite side from the front wall, the second front flap configured to be valley-folded along the crease between the first front flap and the first front flap. and the second front flap configured to be foldable, and the blank is configured so that the ball packaging box can be switched between a first state in which the angle formed by the first front flap and the second front flap is an obtuse angle and the second front flap is aligned with the bottom surface, and a second state in which the angle formed by the first front flap and the second front flap is an acute angle and the second front flap is inclined so that the leading edge of the second front flap faces forward, by changing the folding angle of the second front flap at the score line between the first front flap and the second front flap.

[0017] According to the above configuration, in the manufactured ball packaging box, the support position of the balls within the packaging box can be switched by changing the folding angle of the second front flap, which allows multiple types of balls with different diameters to be stored in the ball packaging box assembled from a common blank.

[0018] [Aspect 9] An intermediate product used in the manufacture of a carton box, comprising four main walls, namely, an upper wall, a lower wall, a right wall, and a left wall, the four main walls being connected to form a flat tube; a front wall connected to the lower wall so as to be able to rise upward from a front end of the lower wall; a first front flap connected to the front wall on the opposite side from the lower wall, the first front flap being configured to be bendable along a crease between the front wall and the first front flap so as to extend from an upper end of the front wall toward a bottom surface inside the carton box; and a second front flap connected to the first front flap on the opposite side from the front wall, the first front flap being able to be folded along a crease between the front wall and the first front flap. and the second front flap configured to be valley-foldable at the crease between the first and second front flaps, wherein the packaging box intermediate is configured to have a structure in which the angle between the first and second front flaps is obtuse and the second front flap is aligned with the bottom surface, and a second state in which the angle between the first and second front flaps is acute and the second front flap is inclined so that the leading edge of the second front flap faces forward, by changing the folding angle of the second front flap at the crease between the first and second front flaps.

[0019] According to the above configuration, in the manufactured ball packaging box, the support position of the balls within the packaging box can be switched by changing the folding angle of the second front flap, which allows multiple types of balls with different diameters to be stored in the ball packaging box assembled from a common blank. [Effects of the Invention]

[0020] According to the present invention, a plurality of types of balls having different diameters can be accommodated in the ball packaging box. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a ball packaging box according to a first embodiment; [Figure 2] FIG. 2 is a diagram showing a medium-sized blank in the first embodiment. [Figure 3] FIG. 3 is a diagram showing a small-sized blank in the first embodiment. [Figure 4] FIG. 2 is a diagram showing a large-sized blank in the first embodiment. [Figure 5] FIG. 2 is a diagram showing a planar structure of a packaging box intermediate body in the first embodiment. [Figure 6] FIG. 2 is a perspective view showing the ball packaging box in a first state according to the first embodiment. [Figure 7] FIG. 2 is a perspective view showing the ball packaging box in a first state according to the first embodiment. [Figure 8] FIG. 2 is a perspective view showing the ball packaging box in a first state according to the first embodiment. [Figure 9] FIG. 2 is a perspective view showing the ball packaging box in a first state according to the first embodiment. [Figure 10] FIG. 2 is a front view of the ball packaging box in the first state according to the first embodiment. [Figure 11] FIG. 2 is a rear view of the ball packaging box in the first state according to the first embodiment. [Figure 12] FIG. 2 is a right side view of the ball packaging box in the first state according to the first embodiment. [Figure 13] FIG. 2 is a left side view of the ball packaging box in the first state according to the first embodiment. [Figure 14] FIG. 2 is a plan view of the ball packaging box in the first state according to the first embodiment. [Figure 15] FIG. 2 is a bottom view of the ball packaging box in the first state according to the first embodiment. [Figure 16] FIG. 2 is a diagram showing a cross-sectional structure of the ball packaging box in a first state according to the first embodiment. [Figure 17] FIG. 4 is a perspective view showing the ball packaging box in a second state according to the first embodiment. [Figure 18] FIG. 4 is a perspective view showing the ball packaging box in a second state according to the first embodiment. [Figure 19] FIG. 4 is a perspective view showing the ball packaging box in a second state according to the first embodiment. [Figure 20] FIG. 4 is a front view of the ball packaging box in the second state according to the first embodiment. [Figure 21] FIG. 4 is a rear view of the ball packaging box in the second state according to the first embodiment. [Figure 22] FIG. 4 is a diagram showing a cross-sectional structure of the ball packaging box in a second state according to the first embodiment. [Figure 23] FIG. 10 is a diagram showing a medium-sized blank in a second embodiment. [Figure 24] FIG. 10 is a perspective view showing a ball packaging box according to a second embodiment. [Figure 25] FIG. 10 is a perspective view showing a ball packaging box according to a second embodiment. [Figure 26] FIG. 10 is a perspective view showing a modified example of a ball packaging box. DETAILED DESCRIPTION OF THE INVENTION

[0022] (First embodiment) A first embodiment of a packaging box, a blank, and a packaging box intermediate will be described with reference to Figures 1 to 22. In the following description, the up-down, front-rear, and left-right directions correspond to directions when the packaging box is placed on a horizontal surface.

[0023] [Overall structure of the cardboard packaging box] As shown in Figure 1, the ball packaging box 100 has a cylindrical body made up of four main walls: an upper wall 10, a lower wall 20, a right wall 30, and a left wall 40, and stores balls 110 in the space enclosed by the cylindrical body. The front and rear of the ball packaging box 100 are open, so that the stored balls 110 can be seen from the front and rear of the ball packaging box 100. The balls 110 are, for example, balls for ball games such as basketballs, volleyballs, soccer balls, dodgeballs, and handballs.

[0024] [Blank Configuration] 2 to 4 show blanks for manufacturing a ball packaging box 100. The ball packaging box 100 is formed by assembling one blank. There are two types of assembly methods for the blank: a first assembly method forms a ball packaging box 100 in a large diameter state, and a second assembly method forms a ball packaging box 100 in a small diameter state. The large diameter state is an example of the first state, and the small diameter state is an example of the second state. The diameter of the balls 110 that can be housed in the ball packaging box 100 differs between the large diameter state and the small diameter state, and the ball packaging box 100 in the large diameter state can house balls 110 with a larger diameter than the ball packaging box 100 in the small diameter state.

[0025] For example, the ball packaging box 100 in the large diameter state can accommodate size 6 and size 7 basketballs, and the ball packaging box 100 in the small diameter state can accommodate size 5 basketballs. In this way, by changing the assembly method of the blank, balls of different sizes can be accommodated in the ball packaging box 100. Furthermore, by changing the size of the blank itself, it is possible to accommodate a wider variety of balls.

[0026] As an example, three sizes of blanks are shown in Figures 2 to 4. Figure 2 shows a medium-sized blank 101, Figure 3 shows a small-sized blank 102, and Figure 4 shows a large-sized blank 103. In this way, by using three sizes of blanks and two assembly methods, the ball packaging box 100 can generally accommodate a variety of game balls with diameters of approximately 18 cm to 25 cm.

[0027] The configuration of this embodiment will be described below using diagrams of a medium-sized blank 101 and a packaging box intermediate and a ball packaging box 100 formed by assembling this blank 101. Blanks of different sizes differ in detailed shape, such as the curvature of the arc portion that contacts the ball after assembly, but whichever blank is used, the configuration of each part and assembly method of the blank, packaging box intermediate, and ball packaging box 100 described below are the same.

[0028] As shown in Figure 2, in the blank 101, four main walls, namely the left wall 40, bottom wall 20, right wall 30, and top wall 10, are arranged in a row in this order, and adjacent main walls are connected via creases 60a to 60c, which are folding lines. Furthermore, on the side of the top wall 10 opposite the right wall 30, an adhesive tab 50 is connected via crease 60d. The adhesive tab 50 is a portion that is adhered to the rear edge of the left wall 40 during the assembly process of the blank 101, and extends in a strip shape.

[0029] The bottom wall 20 has a rectangular shape, and the front end of the bottom wall 20 is connected to the front wall 21 via a ruled line 62a. The front wall 21 has a strip shape extending in the left-right direction. A first front flap 22 is connected to the front wall 21 on the side opposite the bottom wall 20 via a ruled line 62b, and a second front flap 23 is connected to the first front flap 22 on the side opposite the front wall 21 via a ruled line 62c. The first front flap 22 has a rectangular shape, and the tip of the second front flap 23 has an arc-shaped tip edge 23a that protrudes toward the ruled line 62c.

[0030] A substantially triangular first side end piece 24 is connected to each of the left and right side edges of the first front flap 22 via a crease 62d. A notch 29 is provided in the center of the crease 62d. The notch 29 is a cut that penetrates the blank 101. A substantially triangular second side end piece 25 is connected to each of the left and right side edges of the second front flap 23 via a crease 62e.

[0031] The right auxiliary piece 31, the right restriction piece 32, and the front right flap 33 are connected to the front end of the right wall 30 via creases 63a to 63c, starting from a position close to the bottom wall 20. The front end of the right wall 30 is recessed inward at the portion where the base ends of the right restriction piece 32 and the front right flap 33 are located. The left auxiliary piece 41, the left restriction piece 42, and the front left flap 43 are connected to the front end of the left wall 40 via creases 64a to 64c, starting from a position close to the bottom wall 20. The front end of the left wall 40 is recessed inward at the portion where the base ends of the left restriction piece 42 and the front left flap 43 are located.

[0032] The right wall 30 and the left wall 40, the right auxiliary piece 31 and the left auxiliary piece 41, the right restriction piece 32 and the left restriction piece 42, and the front right flap 33 and the front left flap 43 each have a shape that is symmetrical to one another. The right auxiliary piece 31 and the left auxiliary piece 41 have a generally rectangular shape. The right restriction piece 32 and the left restriction piece 42 have a generally triangular shape, with the right restriction piece 32 having a protrusion 35 at its end and the left restriction piece 42 having a protrusion 45 at its end. The front right flap 33 and the front left flap 43 each have a generally triangular shape, with the front right flap 33 having an arc-shaped leading edge 33a at its tip and the front left flap 43 having an arc-shaped leading edge 43a at its tip.

[0033] The top wall 10 has a substantially rectangular shape, and the front upper flap 11 is connected to the front end of the top wall 10 via a ruled line 61a. An arc-shaped leading edge 11a is located at the leading end of the front upper flap 11. Adjacent ends of the front upper flap 11 and the front right flap 33 have a structure that allows them to engage with each other, and after the front upper flap 11 and the front left flap 43 are assembled, adjacent ends also have a structure that allows them to engage with each other. In other words, the ends can be engaged with each other by a recess on one end that hooks onto a protrusion on the other end.

[0034] The base end of the rear lower flap 26 is connected to the rear end of the lower wall 20 via crease 62f. An arc-shaped leading edge 26a protruding toward crease 62f is located at the leading edge of the rear lower flap 26, and the center of leading edge 26a is connected to the lower folded piece 27 via crease 62g. In other words, the left and right ends of the lower folded piece 27 are separated from the rear lower flap 26. An arc-shaped leading edge 27a protruding toward crease 62g is located at the leading edge of the lower folded piece 27. The entire lower folded piece 27 extends in a substantially arc-shaped band shape.

[0035] Similarly, a rear-upper flap 16 having an arc-shaped leading edge 16a is connected to the rear end of the upper wall 10 via a crease 61f, and an upper folded piece 17 having an arc-shaped leading edge 17a is connected to the center of the leading edge 16a via a crease 61g. The shape of the rear-upper flap 16 is the same as the shape of the rear-lower flap 26, and the shape of the upper folded piece 17 is the same as the shape of the lower folded piece 27.

[0036] A rear right flap 36 having an arc-shaped leading edge 36a is connected to the rear end of the right wall 30 via a crease 63f, and a right bent piece 37 having an arc-shaped leading edge 37a is connected to the center of the leading edge 36a via a crease 63g. The right bent piece 37 has a substantially arc-shaped band shape that is shorter than the bottom bent piece 27.

[0037] Similarly, a rear left flap 46 having an arc-shaped leading edge 46a is connected to the rear end of the left wall 40 via a crease 64f, and a left bent piece 47 having an arc-shaped leading edge 47a is connected to the center of the leading edge 46a via a crease 64g. The shape of the rear right flap 36 is the same as that of the rear left flap 46, and the shape of the right bent piece 37 is the same as that of the left bent piece 47.

[0038] Adjacent ends of the rear lower flap 26 and the rear left flap 46 are structured to be engageable with each other. Similarly, adjacent ends of the rear lower flap 26 and the rear right flap 36, adjacent ends of the rear right flap 36 and the rear upper flap 16, and adjacent ends of the rear upper flap 16 and the rear left flap 46 after assembly are structured to be engageable with each other. In other words, the ends can be engaged with each other by a recess on one end being hooked onto a protrusion on the other end. Each of the rear upper flap 16, the rear lower flap 26, the rear right flap 36, and the rear left flap 46 is an example of a rear flap.

[0039] At least two of the lines 60a to 60d between the four main walls and the adhesive strips 50 are folded from the blank 101, and the adhesive strip 50 is adhered to the rear end of the right wall 30, thereby forming a packaging box intermediate 105 shown in Fig. 5. In the packaging box intermediate 105, the right wall 30, the top wall 10, the left wall 40, and the bottom wall 20 are connected in a flat tubular shape.

[0040] For example, after forming a packaging box intermediate 105 from a blank 101 at a factory or the like, the packaging box intermediate 105 is transported to a base where balls are stored, and at the base, a ball packaging box 100 is assembled from the packaging box intermediate 105 and balls 110 are stored in the ball packaging box 100. This makes it possible to reduce the space required for transportation compared to transporting the assembled ball packaging box 100. At the same time, compared to assembling the ball packaging box 100 from the blank 101 at the base, the process of adhering the adhesive tab 50 is not required, and therefore the work required to assemble the ball packaging box 100 can be simplified. The blank 101 is made of, for example, paper such as corrugated cardboard or cardboard, or a plastic sheet.

[0041] [Large diameter state] A large-diameter ball packaging box 100 formed by assembling blanks 101 by a first assembly method will be described. When assembling the ball packaging box 100, a packaging box intermediate 105 is formed from the blank 101, and then a cylindrical body consisting of four main walls is pulled up, and the front lower, front upper, and rear walls are each assembled.

[0042] 6 to 9 show a perspective structure of the large-diameter ball packaging box 100. The lower front surface of the ball packaging box 100 is formed by assembling a front wall 21, a first front flap 22, a second front flap 23, a first side end piece 24, a second side end piece 25, a right auxiliary piece 31, a left auxiliary piece 41, a right regulating piece 32, and a left regulating piece 42.

[0043] As shown in Figures 6 and 7, the front wall 21 rises upward from the front end of the lower wall 20. The height of the front wall 21 is one-third or less of the height of the ball packaging box 100. The first front flap 22 extends from the upper end of the front wall 21 toward the inside of the ball packaging box 100. The first front flap 22 is inclined from the front wall 21 toward the lower wall 20 so that the rear end, which is the end opposite to the front wall 21, comes into contact with the bottom surface inside the ball packaging box 100. The bottom surface is a surface that the lower wall 20 has.

[0044] The second front flap 23 extends along the bottom surface inside the ball packaging box 100. That is, the entire second front flap 23 is in contact with the bottom wall 20. At this time, the crease 62c between the first front flap 22 and the second front flap 23, i.e., the crease 62c at the rear end of the first front flap 22, is valley-folded. The second side end piece 25 extending from the right end of the second front flap 23 along the crease 62e is valley-folded at the crease 62e and runs along the right wall 30 inside the ball packaging box 100. The second side end piece 25 extending from the left end of the second front flap 23 along the crease 62e is valley-folded at the crease 62e and runs along the left wall 40 inside the ball packaging box 100.

[0045] The first side piece 24 extending from the right end of the first front flap 22 along the crease 62d is valley-folded at the crease 62d and fits along the right wall 30 inside the ball packaging box 100. The right restricting piece 32 extending from the front end of the right wall 30 along the crease 63b is mountain-folded along the crease 63b and folded inward toward the right wall 30, and the first side piece 24 is sandwiched between the right restricting piece 32 and the right wall 30. The protrusion 35 of the right restricting piece 32 is inserted into and engaged with the notch 29 located at the base of the first side piece 24, thereby fixing the positions of the right restricting piece 32 and the first side piece 24.

[0046] Similarly, the first side piece 24 extending from the left end of the first front flap 22 along the crease 62d is valley-folded at the crease 62d and fits along the left wall 40 inside the ball packaging box 100. The left restriction piece 42 extending from the front end of the left wall 40 along the crease 64b is mountain-folded along the crease 64b and folded inward toward the left wall 40, and the first side piece 24 is sandwiched between the left restriction piece 42 and the left wall 40. The protrusion 45 of the left restriction piece 42 is inserted into and engaged with the notch 29 located at the base of the first side piece 24, thereby fixing the positions of the left restriction piece 42 and the first side piece 24.

[0047] The position of the first front flap 22 is fixed by fixing the positions of the right restriction piece 32, the left restriction piece 42, and the two first side end pieces 24. The right auxiliary piece 31 and the left auxiliary piece 41 are inserted along the back surface of the front wall 21 into the space defined by the front wall 21 and the first front flap 22.

[0048] 8, the upper front surface of the ball packaging box 100 is formed by assembling the front upper flap 11, the front right flap 33, and the front left flap 43. That is, the flaps 11, 33, and 43 are folded toward the inside of the ball packaging box 100, and the right end of the front upper flap 11 is engaged with the upper end of the front right flap 33, and the left end of the front upper flap 11 is engaged with the upper end of the front left flap 43. As a result, the flaps 11, 33, and 43 are held in an inclined state so as to extend from the front ends of the top wall 10, right wall 30, and left wall 40 toward the inside of the ball packaging box 100, and curved sides formed by the connecting tip edges 11a, 33a, and 43a of the flaps 11, 33, and 43 are arranged at their tips.

[0049] 9, the rear surface of the carton packaging box 100 is formed by assembling the rear upper flap 16, the rear lower flap 26, the rear right flap 36, and the rear left flap 46. In detail, the upper folding piece 17 is folded along the crease 61g toward the rear side of the rear upper flap 16 and is disposed inside the carton packaging box 100. Similarly, the lower folding piece 27 is folded along the crease 62g toward the rear side of the rear lower flap 26, the right folding piece 37 is folded along the crease 63g toward the rear side of the rear right flap 36, and the left folding piece 47 is folded along the crease 64g toward the rear side of the rear left flap 46.

[0050] Then, each of the flaps 16, 26, 36, 46 is folded toward the inside of the ball packaging box 100, and the right end of the rear upper flap 16 is engaged with the upper end of the rear right flap 36, the left end of the rear upper flap 16 is engaged with the upper end of the rear left flap 46, the right end of the rear lower flap 26 is engaged with the lower end of the rear right flap 36, and the left end of the rear lower flap 26 is engaged with the lower end of the rear left flap 46.

[0051] As a result, the flaps 16, 26, 36, and 46 are held in a state of inclination so as to face toward the inside of the ball packaging box 100 from the rear ends of the upper wall 10, the lower wall 20, the right wall 30, and the left wall 40, and curved sides are arranged at the leading ends of the flaps, where the leading end sides 16a, 26a, 36a, and 46a of the flaps 16, 26, 36, and 46 are connected. An opening defined by the curved sides is formed on the rear surface of the ball packaging box 100.

[0052] The engagement of the flaps 16, 26, 36, 46 restricts the flaps 16, 26, 36, 46 from opening outward from the ball packaging box 100, while allowing the flaps 16, 26, 36, 46 to be folded inward from the ball packaging box 100.

[0053] The order in which the lower front face, upper front face, and rear face of the ball packaging box 100 are assembled is not particularly limited, but assembling the rear face after assembling the lower front face and upper front face allows the assembly of the ball packaging box 100 to proceed smoothly.

[0054] The balls 110 are accommodated from the rear of the ball packaging box 100. The balls 110 may be accommodated before the rear surface is assembled, after a part of the rear surface is assembled, or after the rear surface is assembled. Even after the rear surface is assembled, the flaps 16, 26, 36, and 46 are allowed to be folded toward the inside of the ball packaging box 100, so the balls 110 can be accommodated. Since the rear surface is easier to assemble without the balls 110 accommodated, accommodating the balls 110 after the rear surface is assembled can smoothly proceed with the assembly of the ball packaging box 100 and the accommodation of the balls 110.

[0055] 10 to 15 are six-sided views of the ball packaging box 100 in the large diameter state, with FIG. 10 being a front view, FIG. 11 being a back view, FIG. 12 being a right side view, FIG. 13 being a left side view, FIG. 14 being a plan view, and FIG. 15 being a bottom view.

[0056] As shown in Figures 10 to 15, openings are formed in the front and rear of the ball packaging box 100. The lower front surface of the ball packaging box 100 protrudes further forward than the upper front surface. In other words, as shown in Figures 12 and 13, a depression Dp is formed in the front portions of the right wall 30 and the left wall 40, and is composed of an oblique side extending from the front end of the top wall 10 and an oblique side extending from the upper end of the front wall 21. The depression Dp is deepest at the intersection of these oblique sides.

[0057] 16 shows a cross-sectional structure of the ball packaging box 100 in the large diameter state along the front-rear direction, together with balls 110 housed in the ball packaging box 100. In the large diameter state, the angle α formed between the first front flap 22 and the second front flap 23 is an obtuse angle.

[0058] The upper front part of the stored ball 110 abuts against the leading edges 11a, 33a, 43a of the upper front flap 11, the right front flap 33, and the left front flap 43, and the lower front part of the ball 110 abuts against the first front flap 22, which is a slope that rises forward, thereby preventing the ball 110 from rolling forward.

[0059] Furthermore, the rear portion of the ball 110 abuts against the leading edges 16a, 26a, 36a, and 46a of the rear upper flap 16, rear lower flap 26, rear right flap 36, and rear left flap 46, thereby preventing the ball 110 from rolling rearward. The inclination of each of the flaps 16, 26, 36, and 46 on the rear surface may change depending on the diameter of the ball 110, and if the ball 110 is accommodated after the rear surface is assembled, it is easy to adjust the inclination of each of the flaps 16, 26, 36, and 46 to match the diameter of the ball 110.

[0060] In this way, the position of the ball 110 inside the ball packaging box 100 is stabilized by support at the upper front surface by the tips of the flaps 11, 33, 43, support at the lower front surface by the first front flap 22, and support at the rear surface by the tips of the flaps 16, 26, 36, 46. This allows the ball 110 to be held accurately inside the ball packaging box 100.

[0061] The contained ball 110 does not need to be in contact with the flaps 11, 33, 43 at the upper front surface, the first front flap 22, and the flaps 16, 26, 36, 46 at the rear surface at the same time. When the ball 110 attempts to move forward, its forward rolling is prevented by contact with the flaps 11, 33, 43 at the upper front surface and the first front flap 22, and when the ball 110 attempts to move backward, its backward rolling is prevented by contact with the flaps 16, 26, 36, 46 at the rear surface. Any ball 110 having a diameter within such a range that its rolling on the front and rear surfaces can be contained in the large-diameter ball packaging box 100.

[0062] [Small diameter state] A description will be given of a small-diameter ball packaging box 100 formed by assembling blanks 101 by the second assembly method. When assembling the ball packaging box 100, a packaging box intermediate 105 is formed from the blank 101, and then a cylindrical body consisting of four main walls is pulled up, and the front lower, front upper, and rear walls are each assembled.

[0063] 17 to 19 show a perspective structure of the ball packaging box 100 in the small diameter state. The configuration of the upper front surface is the same as that in the large diameter state. Below, the configurations of the lower front surface and the rear surface that differ from those in the large diameter state will be described.

[0064] 17 and 18, the arrangement of the components at the lower front surface other than the second front flap 23 and the second side end piece 25 is the same as in the large diameter state. The second front flap 23 is folded back along the crease 62c toward the first front flap 22. As a result, the second front flap 23 extends obliquely forward from above the bottom surface of the ball packaging box 100, with the arc-shaped leading edge 23a located at the leading edge. In other words, the second front flap 23 is inclined so that the leading edge 23a faces forward.

[0065] The right end of the second front flap 23 abuts against the right restricting piece 32, and the second side end piece 25 extending from this right end is sandwiched between the right restricting piece 32 and the right wall 30. Similarly, the left end of the second front flap 23 abuts against the left restricting piece 42, and the second side end piece 25 extending from this left end is sandwiched between the left restricting piece 42 and the left wall 40. This fixes the position of the second front flap 23. In other words, the restricting pieces 32, 42 restrict change in the angle of the second front flap 23 relative to the first front flap 22.

[0066] As shown in Figure 19, on the rear surface, the upper folded piece 17 extends from the tip of the rear upper flap 16. In other words, the upper folded piece 17 is not folded. Similarly, the lower folded piece 27 extends from the tip of the rear lower flap 26, the right folded piece 37 extends from the tip of the rear right flap 36, and the left folded piece 47 extends from the tip of the rear left flap 46. The engagement of the rear upper flap 16, rear lower flap 26, rear right flap 36, and rear left flap 46 is the same as in the large diameter state.

[0067] As a result, a structure made up of the flaps 16, 26, 36, 46 and the folding pieces 17, 27, 37, 47 is held in a state inclined toward the inside of the ball packaging box 100 from the rear ends of the upper wall 10, lower wall 20, right wall 30, and left wall 40. Then, curved sides formed by connecting the leading edges 17a, 27a, 37a, 47a of the folding pieces 17, 27, 37, 47 are arranged at the leading ends of the structure, and an opening defined by this curved side is formed in the rear surface of the ball packaging box 100. The diameter of the opening in the rear surface in the small diameter state is smaller than the diameter of the opening in the rear surface in the large diameter state. The assembly order of the front lower part, front upper part and rear part and the procedure for accommodating the ball 110 in the small diameter state are the same as those in the large diameter state.

[0068] 20 and 21 are partial six-sided views of the ball packaging box 100 in the small diameter state, with Fig. 20 showing a front view and Fig. 21 showing a back view. The right side view, left side view, plan view, and bottom view of the ball packaging box 100 in the small diameter state are the same as those in the large diameter state.

[0069] 22 shows a cross-sectional structure of the ball packaging box 100 in the small diameter state along the front-rear direction, together with balls 110 housed in the ball packaging box 100. In the small diameter state, the angle α formed between the first front flap 22 and the second front flap 23 is an acute angle.

[0070] The front upper part of the stored ball 110 abuts against the leading edges 11a, 33a, 43a of the front upper flap 11, the front right flap 33, and the front left flap 43, and the front lower part of the ball 110 abuts against the leading edge 23a of the second front flap 23, thereby preventing the ball 110 from rolling forward.

[0071] Furthermore, the rear portion of ball 110 abuts against tip edges 17a, 27a, 37a, and 47a of upper bending piece 17, lower bending piece 27, right bending piece 37, and left bending piece 47, thereby preventing ball 110 from rolling backward. The inclination of each of flaps 16, 26, 36, and 46 and bending pieces 17, 27, 37, and 47 on the rear surface may change depending on the diameter of ball 110, and if the rear surface is configured to accommodate ball 110 after assembly, it is easy to adjust the inclination of each of flaps 16, 26, 36, and 46 and bending pieces 17, 27, 37, and 47 to match the diameter of ball 110.

[0072] In this way, the position of the ball 110 inside the ball packaging box 100 is stabilized by support at the upper front surface by the tips of the flaps 11, 33, 43, support at the lower front surface by the tip of the second front flap 23, and support at the rear surface by the tips of the bent pieces 17, 27, 37, 47. As a result, the ball 110 is held accurately inside the ball packaging box 100.

[0073] The tip of the second front flap 23, which supports the lower front surface of the ball 110, is positioned higher and further back than the first front flap 22, which supports the lower front surface of the ball 110, in the large diameter state, and the opening formed by the tips of the folded pieces 17, 27, 37, and 47 is smaller and positioned further forward than the opening formed by the tips of the flaps 16, 26, 36, and 46 in the large diameter state. Thus, in the small diameter state, the support positions of the ball 110 by each member are positioned in a narrower range than in the large diameter state. Therefore, the ball packaging box 100 in the small diameter state can accommodate balls 110 with a smaller diameter than in the large diameter state.

[0074] The contained ball 110 does not need to be in contact with the flaps 11, 33, 43 at the upper front surface, the second front flap 23, and the folded pieces 17, 27, 37, 47 at the rear surface at the same time. When the ball 110 attempts to move forward, its forward rolling is prevented by contact with the flaps 11, 33, 43 at the upper front surface and the second front flap 23, and when the ball 110 attempts to move backward, its backward rolling is prevented by contact with the folded pieces 17, 27, 37, 47 at the rear surface. Any ball 110 having a diameter within such a range that its rolling can be restricted on the front and rear surfaces can be contained in the small-diameter ball packaging box 100.

[0075] As described above, according to the first embodiment, the following effects can be obtained. (1) The support position of the balls 110 in the ball packaging box 100 can be switched by changing the folding angle of the second front flap 23. Therefore, a plurality of types of balls 110 with different diameters can be accommodated in the ball packaging box 100 assembled from the same blank 101. Therefore, it is not necessary to prepare separate blanks and ball packaging boxes for each of the balls 110 with different diameters, which improves the efficiency of manufacturing the blanks 101 and managing the ball packaging box 100.

[0076] (2) Because the leading edge 23a of the second front flap 23 includes an arc-shaped portion, the leading edge 23a can easily fit along the ball 110. Therefore, the second front flap 23 can stably support the ball 110.

[0077] (3) In the small diameter state, the restricting pieces 32, 42 restrict the change in the angle of the second front flap 23 relative to the first front flap 22. Therefore, the position of the second front flap 23 is stable, and the ball 110 can be supported stably.

[0078] (4) The support position of the ball 110 on the rear surface changes depending on whether or not the folding pieces 17, 27, 37, 47 are folded. Therefore, the range of diameters of the balls 110 that can be accommodated can be wider than when the diameter of the balls 110 that can be accommodated is changed only by changing the folding angle of the second front flap 23.

[0079] (5) The leading edge of each of the flaps 16, 26, 36, 46 and each of the bent pieces 17, 27, 37, 47 on the rear surface includes an arc-shaped portion, so that the leading edge easily fits along the ball 110. Therefore, the ball 110 can be stably supported on the rear surface.

[0080] (Second embodiment) A second embodiment of a packaging box, a blank, and a packaging box intermediate will be described with reference to Figures 23 to 25. The following description will focus on the differences between the second embodiment and the first embodiment, and the same components as those in the first embodiment will be denoted by the same reference numerals and will not be described again.

[0081] The second embodiment aims to improve the convenience of users of the ball packaging box. The first aim of the second embodiment is to make it easier to transport the ball packaging box when the user moves it to display balls, etc. The second aim of the second embodiment is to make it easier to open the ball packaging box when the user takes balls out of the ball packaging box.

[0082] 23 shows a blank 107 of the second embodiment. Blank 107 differs from the first embodiment in that it includes finger hook portion 70, finger rest portions 71 and 72, and auxiliary fold lines 73 to 76, but other configurations are the same as those of the first embodiment. Note that, in the second embodiment, the drawings also show a medium-sized blank 107 and a cardboard packaging box formed by assembling this blank 107, but small-sized and large-sized blanks can also be used in the same way.

[0083] Finger hook 70 is located on left wall 40. A cut is made in part of left wall 40 so that a hole extending in a generally rectangular or oval shape can be formed in finger hook 70. For example, only a portion of the outer periphery of the portion that will become the hole, such as the upper edge, is connected to the rest of left wall 40, and the rest of the outer periphery is cut off from the surrounding area.

[0084] The right finger rest 71 is located near the right wall 30 of the rear right flap 36, and the left finger rest 72 is located near the left wall 40 of the rear left flap 46. In the finger rests 71, 72, cuts are made in parts of the flaps 36, 46 so that holes slightly larger than the thumb can be formed. For example, only a part of the outer periphery of the hole, such as a side edge, is connected to other parts of the flaps 36, 46, and the other parts of the outer periphery are cut off from the surrounding area.

[0085] The auxiliary fold line 73 forms a mountain shape consisting of two diagonal lines, and extends into the right wall 30 with the mountain peak at the center of the crease 63f between the right wall 30 and the rear right flap 36. In other words, the distance between the two diagonal lines increases as they move away from the crease 63f.

[0086] Similarly, the auxiliary fold line 74 forms a mountain shape consisting of two diagonal lines, and extends into the left wall 40 with the mountain peak at the center of the crease 64f between the left wall 40 and the rear left flap 46. In other words, the distance between the two diagonal lines increases as they move away from the crease 64f.

[0087] The auxiliary fold line 75 consists of two diagonal lines, and extends within the rear right flap 36 from around the right finger rest 71 toward the right folding piece 37 so that the distance between the two diagonal lines widens. Similarly, the auxiliary fold line 76 consists of two diagonal lines, and extends within the rear left flap 46 from around the left finger rest 72 toward the left folding piece 47 so that the distance between the two diagonal lines widens.

[0088] The auxiliary fold lines 73 to 75 are processed to make the blank 107 easier to fold, like the other ruled lines. Such processing may be performed only on the surface of the blank 107 that will be the inside of the packaging box. If the auxiliary fold lines 73 to 75 are processed only on the inside surface of the packaging box, the auxiliary fold lines 73 to 75 cannot be seen from the outside of the packaging box, thereby improving the design of the packaging box.

[0089] The assembling method of the blank 107 in the second embodiment is the same as that in the first embodiment. In the second embodiment, similarly to the first embodiment, by changing the assembling method, large-diameter and small-diameter ball packaging boxes can be formed.

[0090] 24 and 25 show a perspective structure of the ball packaging box 106 of the second embodiment. Although Fig. 24 and Fig. 25 show the ball packaging box 106 in a large diameter state, as described above, the ball packaging box 106 may also be in a small diameter state.

[0091] As shown in FIG. 24 , the finger hook 70 is located at an upper portion inside the left wall 40. A user can easily hold the ball packaging box 106 by hooking a finger through a hole formed in the finger hook 70. This allows the user to easily move the ball packaging box 106 and even carry one ball packaging box 106 with one hand. The hole of the finger hook 70 is formed by folding a portion that is cut away from the surrounding area toward the inside of the ball packaging box 106. The finger hook 70 may be a through-hole that is formed in advance in the blank 107, but if the hole is formed by folding a portion of the blank 107, the user's hand is prevented from touching the cut surface of the hole.

[0092] This solves the first problem and improves user convenience. The finger hook 70 may be provided on the right wall 30 instead of the left wall 40, or may be provided on both the right wall 30 and the left wall 40.

[0093] As shown in FIG. 25 , the right finger rest 71 is located in the vertical center near the right wall 30 of the rear right flap 36, and the left finger rest 72 is located in the vertical center near the left wall 40 of the rear left flap 46. A user places their right thumb in the hole formed in the right finger rest 71 and grasps the corner between the rear right flap 36 and the right wall 30 with their right hand, and places their left thumb in the hole formed in the left finger rest 72 and grasps the corner between the rear left flap 46 and the left wall 40 with their left hand. Then, the user applies force to push the right wall 30 and the left wall 40 apart in the left-right direction and push the rear right flap 36 and the rear left flap 46 into the ball packaging box 106. This loosens the engagement between the flaps 16, 26, 36, and 46 on the rear surface, opening the rear surface and allowing the ball 110 contained in the ball packaging box 106 to be removed.

[0094] The provision of the finger rests 71 and 72 makes it easier for the user to know which part to support when opening the ball packaging box 106. Therefore, even a user who is unfamiliar with handling the ball packaging box 106 can easily open the ball packaging box 106.

[0095] Furthermore, since the ball packaging box 106 is easily bent at the positions of the auxiliary fold lines 73 to 76, when force is applied as described above, the ball packaging box 106 is easily deformed so that the right wall 30 and the left wall 40 spread in the left-right direction. Therefore, the rear surface is easily opened. This makes it easier to open the ball packaging box 106. Furthermore, the provision of the auxiliary fold lines 73 to 76 can also prevent folds and wrinkles from occurring in areas other than the auxiliary fold lines 73 to 76.

[0096] The finger rests 71 and 72 may be areas that indicate the support positions of the user when the rear flaps 16, 26, 36, and 46 are released from engagement to open the ball packaging box 106, and are not limited to areas configured to allow holes to be formed, but may also be areas that indicate the support positions by processing such as printing or embossing. The ball packaging box 106 may also be opened by being pushed open in the vertical direction, in which case the finger rests may be provided on the rear upper flap 16 and the rear lower flap 26. As a result, the second problem can be solved, and user convenience can be improved.

[0097] According to the second embodiment, in addition to the effects (1) to (5) of the first embodiment, the following effects can be obtained.

[0098] (6) The finger grips 70 are provided on the main wall, so that the user can easily hold the ball packaging box 106. Therefore, the ball packaging box 106 is easy to transport, and user convenience is improved.

[0099] (7) The finger rests 71, 72 are provided on the rear flap located on the rear surface, so that the user can easily grasp the position to support when opening the ball packaging box 106. Therefore, the ball packaging box 106 can be easily opened, and user convenience is improved.

[0100] (Variation) The above-described embodiments may be modified as follows: The following modifications may be combined with each other.

[0101] 26, an extension piece 28 may extend upward from a portion of the upper end of the front wall 21. The extension piece 28 extends upward, for example, from the right end or left end of the front wall 21. The shape of the extension piece 28 is not particularly limited, and the extension piece 28 may be, for example, rectangular or trapezoidal. The extension piece 28 is used to display information about the balls 110 contained in the ball packaging box 108. The extension piece 28 extending from the front wall 21 can be formed by configuring the blank so that the vicinity of the base of the first front flap 22 is cut off from the portion other than the front wall 21. According to the above configuration, the ball packaging box 108 can be made more suitable for display.

[0102] At least one of the leading edges of the front upper flap 11, the front right flap 33, and the front left flap 43 does not have to be arc-shaped as long as it can support the ball 110, and may be, for example, linear. Similarly, at least one of the leading edges of the rear upper flap 16, the rear lower flap 26, the rear right flap 36, and the rear left flap 46 does not have to be arc-shaped as long as it can support the ball 110, and may be, for example, linear. Furthermore, at least one of the leading edges of the upper bent piece 17, the lower bent piece 27, the right bent piece 37, and the left bent piece 47 does not have to be arc-shaped as long as it can support the ball 110, and may be, for example, linear. Furthermore, the leading edge of the second front flap 23 does not have to be arc-shaped as long as it can support the ball 110, and may be, for example, linear.

[0103] However, if each tip edge has an arc-shaped portion, the ball 110 and the tip edge contact in a linear area, and therefore the position of the ball 110 is more likely to be stable than when the ball 110 and the tip edge contact at a point.

[0104] At least one of the rear upper flap 16, the rear lower flap 26, the rear right flap 36, and the rear left flap 46 does not necessarily have to have a folding piece extending therefrom. For example, folding pieces may extend only from two opposing rear flaps, such as the rear upper flap 16 and the rear lower flap 26, or the rear right flap 36 and the rear left flap 46. Even with this configuration, the ball 110 can be supported from above and below or from the left and right in the small diameter state with the folding pieces extended. However, to more stably support the ball 110 on the rear surface in the small diameter state, it is preferable that folding pieces be extended on all four flaps 16, 26, 36, 46.

[0105] In the small diameter state, the change in the angle of the second front flap 23 relative to the first front flap 22 may be restricted by a structure other than the structure in which the side end piece 25 is sandwiched between the main wall and each of the restriction pieces 32, 42. For example, only one of the right restriction piece 32 and the left restriction piece 42 may be provided.

[0106] The cardboard packaging box may be assembled in a state where the angle between the first front flap 22 and the second front flap 23 is an obtuse angle and the folding pieces 17, 27, 37, and 47 are extended. Also, the cardboard packaging box may be assembled in a state where the angle between the first front flap 22 and the second front flap 23 is an acute angle and the folding pieces 17, 27, 37, and 47 are folded. By utilizing these states, the diameter of the balls that can be accommodated in the cardboard packaging box can be controlled more precisely.

[0107] Furthermore, if the angle between the first front flap 22 and the second front flap 23 is changeable, the rear surface of the ball packaging box may be configured to always support the balls at a specific position. For example, not all of the folding pieces 17, 27, 37, 47 may be provided, or the rear surface may be a single plane without an opening.

[0108] Regardless of the configuration of the rear surface, the first state is when the angle between the first front flap 22 and the second front flap 23 is an obtuse angle, and the second state is when the angle between the first front flap 22 and the second front flap 23 is an acute angle. [Explanation of symbols]

[0109] 10...Upper wall 11...Front upper flap 16...Rear upper flap 17...Upper folded piece 20...Lower wall 21...Front wall 22...First front flap 23...Second front flap 24...First side end piece 25…Second side end piece 26...Rear upper flap 27...Upper folded piece 28...Extension piece 30…Right wall 31...Right auxiliary piece 32...Right regulation piece 33...Front right flap 36...Rear right flap 37...Right bend piece 40...Left wall 41...Left auxiliary piece 42...Left regulation piece 43...Front left flap 46...Rear left flap 47...Left turn piece 70...Finger rest part 71...Right finger rest 72...Left finger rest 100, 106, 108... Ball packaging box 101, 102, 103, 107...blank 105...Packaging box intermediate

Claims

1. A ball packaging box having four main walls, namely an upper wall, a lower wall, a right wall, and a left wall, and configured to accommodate balls in a space surrounded by these main walls, a front wall rising from the front end of the lower wall; a first front flap extending from an upper end of the front wall toward a bottom surface of the ball packaging box; a second front flap connected to the rear end of the first front flap via a valley-folded crease, a first state in which the angle formed between the first front flap and the second front flap is an obtuse angle and the second front flap is aligned along the bottom surface; a second state in which the angle formed between the first front flap and the second front flap is an acute angle and the second front flap is inclined so that a leading edge of the second front flap faces forward; The second front flap can be switched by changing the folding angle at the crease. Ball packaging box.

2. The leading edge of the second front flap includes an arc-shaped portion that protrudes toward the line. The packaging box according to claim 1.

3. a restricting piece that restricts a change in the angle of the second front flap relative to the first front flap in the second state; The packaging box according to claim 1.

4. a side end piece connected to a side end of the second front flap; At least one of the right wall and the left wall is a target main wall; The restricting piece is provided for each of the target main walls, connected to a front end of the target main wall, and bent toward the inside of the cardboard packaging box, In the second state, the restricting piece sandwiches the side end piece between the target main wall and the restricting piece. The packaging box according to claim 3.

5. At least one of the four main walls is a target main wall; A rear flap that constitutes a rear surface of the carton packaging box and is provided for each of the target main walls, the base end of which is connected to the rear end of the target main wall; a folding piece connected to the tip of the rear flap, the folding piece being configured to be foldable toward the back side of the rear flap; The packaging box according to claim 1.

6. At least one of the leading edge of the rear flap and the leading edge of the folded piece includes an arc-shaped portion that protrudes toward the target main wall. The packaging box according to claim 5.

7. The rear flaps constituting the rear surface of the cardboard packaging box include four rear flaps connected to the four main walls, one each; Both ends of each rear flap are engaged with the other rear flap; The four rear flaps include a rear flap including an area indicating a support position by a user when releasing the engagement and opening the ball packaging box. The packaging box according to claim 1.

8. A blank for manufacturing a cardboard packaging box, An upper wall, a lower wall, a right wall, and a left wall connected in a row; a front wall connected to the lower wall so as to be able to rise upward from a front end of the lower wall; a first front flap connected to the front wall on the opposite side of the lower wall, the first front flap being configured to be foldable along a crease between the front wall and the flap so as to extend from an upper end of the front wall toward a bottom surface inside the ball packaging box; a second front flap connected to the first front flap on the opposite side of the front wall, the second front flap being configured to be valley-foldable along a crease between the first front flap and the second front flap; The ball packaging box, a first state in which the angle formed between the first front flap and the second front flap is an obtuse angle and the second front flap is aligned along the bottom surface; a second state in which the angle formed between the first front flap and the second front flap is an acute angle and the second front flap is inclined so that the leading edge of the second front flap faces forward; The structure is configured to be switchable by changing the folding angle of the second front flap at the crease between the first front flap and the second front flap. blank.

9. An intermediate used in the manufacture of cardboard packaging boxes, Four main walls, including an upper wall, a lower wall, a right wall, and a left wall, are connected to form a flat tube; a front wall connected to the lower wall so as to be able to rise upward from a front end of the lower wall; a first front flap connected to the front wall on the opposite side of the lower wall, the first front flap being configured to be foldable along a crease between the front wall and the flap so as to extend from an upper end of the front wall toward a bottom surface inside the ball packaging box; a second front flap connected to the first front flap on the opposite side of the front wall, the second front flap being configured to be valley-foldable along a crease between the first front flap and the second front flap; The ball packaging box, a first state in which the angle formed between the first front flap and the second front flap is an obtuse angle and the second front flap is aligned along the bottom surface; a second state in which the angle formed between the first front flap and the second front flap is an acute angle and the second front flap is inclined so that the leading edge of the second front flap faces forward; The structure is configured to be switchable by changing the folding angle of the second front flap at the crease between the first front flap and the second front flap. Packaging box intermediate.

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