Packaging box

Abstract

To provide a packaging box that improves ease of handling by hand and reduces the risk of the packaging box falling. [Solution] The packaging comprises a rectangular base 11, a pair of first sides 12 extending along the long side of the base, a pair of second sides 13 extending along the short side of the base, a packaging space defined by the base, the pair of first sides, and the pair of second sides, and a top surface 14 that closes the packaging space. The base, the pair of first sides, and the pair of second sides are continuous with each other via folds, and the top surface is continuous with at least one of the pair of first sides and the pair of second sides via folds. The pair of first sides are provided with gripping portions 15 that can be folded inward and upward. When the gripping portions are folded, their ends come into contact with the inner wall of the top surface, thereby improving gripping strength and portability.

Description

Technical Field

[0001] The present invention relates to a packaging box, and particularly to a packaging box for accommodating a roll-shaped film, which has improved portability for manual handling.

Background Art

[0002] Conventionally, a packaging box for a roll-shaped film (hereinafter also referred to as a "carton") is large and heavy. For example, a carton for 3M (registered trademark) DI-NOC (registered trademark) film is known to have a weight of about 25 kg.

[0003] In the transportation from a film manufacturing factory to a finished product warehouse, the carton is loaded on a pallet and conveyed by a forklift or the like, so there are few particular problems.

[0004] However, at a construction site or a retailer, the carton is often handled manually, and there are scattered cases where an operator drops the carton, including transportation by a general delivery carrier.

[0005] Conventional cartons have been transported by an operator holding them under the arm, but due to their large weight, the holding becomes unstable, which has been a cause of dropping. In addition, there has been a problem that conventional cartons do not have a finger hook portion, and the workability when lifting from the floor surface is poor.

[0006] Furthermore, as an actual defect case, the end portion is damaged due to the dropping of the carton, and the plastic member at the end portion that supports the roll-shaped film is damaged, and as a result, dents may occur on the film surface.

Summary of the Invention

Problems to be Solved by the Invention

[0007] This invention was made in view of the problems of the prior art described above, and aims to provide a packaging box that can be easily transported by hand by general delivery companies and construction companies, and that reduces the risk of damage due to dropping. [Means for solving the problem]

[0008] The packaging box according to the present invention comprises a rectangular bottom surface, a pair of first sides extending along the long side of the bottom surface, a pair of second sides extending along the short side of the bottom surface, a packaging space defined by the bottom surface, the pair of first sides, and the pair of second sides, and a top surface that closes the packaging space, wherein the bottom surface, the pair of first sides, and the pair of second sides are continuous with each other via folds, and the top surface is continuous with at least one of the pair of first sides and the pair of second sides via folds, and at least one of the pair of first sides is provided with at least one gripping portion that can be folded inward and upward from the outside of the box, and when the at least one gripping portion is folded, its end contacts the inner wall of the top surface.

[0009] Another embodiment of the packaging box comprises a rectangular bottom surface, a pair of first sides extending along the long side of the bottom surface, a pair of second sides extending along the short side of the bottom surface, a packaging space defined by the bottom surface, the pair of first sides, and the pair of second sides, and a top surface that closes the packaging space, wherein the bottom surface, the pair of first sides, and the pair of second sides are continuous with each other via folds, and the top surface is continuous with at least one of the pair of first sides and the pair of second sides via folds, and at least one of the pair of first sides is provided with two or more gripping portions that can be folded inward and upward from the outside of the box, and the gripping portion is provided with a pair of folds along the folded portion and a notch formed between the pair of folds, and when at least one of the gripping portions is folded, its end contacts the inner wall of the top surface. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is an external perspective view of a packaging box according to one embodiment of the present invention. [Figure 2] Figure 2 is a perspective view of the packaging box shown in Figure 1 from a different angle. [Figure 3] Figure 3 is an enlarged view showing the configuration of the gripping section. [Figure 4] Figure 4 is a magnified view showing an example of the folding operation of the gripping part. [Figure 5] Figure 5 shows a package box containing rolled-up articles. [Figure 6] Figure 6 is a schematic cross-sectional view showing the state in which the end of the gripping portion abuts against the inner wall of the upper surface. [Figure 7] Figure 7 is a schematic cross-sectional view showing another state in which the end of the gripping portion abuts against the inner wall of the upper surface. [Figure 8] Figure 8 is a schematic cross-sectional view showing the state in which the end of the gripping portion is further bent and makes surface contact with the inner wall of the upper surface. [Figure 9] Figure 9 is a schematic cross-sectional view of the three-layer structure that makes up the packaging box. [Figure 10] Figure 10 is an external perspective view showing a modified example of a packaging box. [Figure 11] Figure 11 is a partially enlarged view showing an example of the folding operation of the gripping part shown in Figure 10, and an example of the dimensions around the gripping part. [Figure 12] Figure 12 shows the configuration around the gripping part in a further modified example of the gripping part. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are omitted as appropriate.

[0012] Figure 1 is an external perspective view of a packaging box 1 according to one embodiment of the present invention. The packaging box 1 is a box for accommodating roll-shaped articles, such as roll-shaped film, and is preferably used when the articles are transported manually by construction sites, retailers, delivery companies, etc.

[0013] The packaging box 1 comprises a bottom surface 11, a first side surface 12, a second side surface 13, and a top surface 14. The packaging box 1 may have a substantially rectangular parallelepiped shape as a whole. The first side surface 12 is a pair of side surfaces extending along the long side direction of the packaging box 1, and the second side surface 13 is a pair of side surfaces extending along the shorter side direction than the first side surface 12. The bottom surface 11, the pair of first side surfaces 12, and the pair of second side surfaces 13 define a packaging space, in which a rolled article is contained.

[0014] The packaging box 1 may be formed, for example, by folding a corrugated cardboard sheet, and the bottom surface 11, the pair of first sides 12, and the pair of second sides 13 may be formed continuously with respect to each other via folds. The top surface 14 may also be formed continuously with at least one of the pair of first sides 12 and the pair of second sides 13 and may function as a lid that closes off the packaging space.

[0015] In the example shown in FIG. 1, two gripping portions 15 are provided on the first side surface 12, and the respective gripping portions 15 are spaced apart along the longitudinal direction of the first side surface 12. In the example shown in FIG. 1, the width dimension of each gripping portion 15 is approximately 120 mm, and the interval between the two gripping portions 15 is approximately 520 mm. Further, the gripping portion 15 is disposed at a position approximately 25 mm away from the upper surface 14 of the packaging box 1, and the height dimension of the gripping portion 15 is the same approximately 25 mm. Due to these two types of dimensions being substantially the same, as will be described later, when the gripping portion 15 is folded into the interior of the packaging box 1, the tip portion thereof can be brought into contact with the inner wall of the upper surface 14. Note that these dimensions are merely examples, and the present invention is not limited to these numerical values. Also, in the example shown in FIG. 1, the outer dimensions of the packaging box 1 are 210 mm in length × 210 mm in width × 1275 mm in depth (length in the longitudinal direction), but these dimensions may be appropriately set according to the length, outer diameter, weight of the roll-shaped article to be accommodated, or the gripping property of the operator, etc.

[0016] In the example shown in FIG. 1, a gripping portion 15 is provided on the first side surface 12. The gripping portion 15 is a portion for an operator to grip the packaging box 1, and may be formed by punching out a part of the first side surface 12. The gripping portion 15 is configured to be foldable from the outside to the upper inside of the box body.

[0017] Also, a fold line may be formed at the folding portion of the gripping portion 15. When the operator pushes the gripping portion 15 inward, the gripping portion 15 can bend around the fold line.

[0018] FIG. 1 shows an example in which two gripping portions 15 are provided on the first side surface 12, but the number of arrangements and the arrangement positions are not limited thereto. For example, at least one gripping portion may be provided only on one surface of the pair of first side surfaces 12, at least one gripping portion may be provided on both of the pair of first side surfaces 12, and at least one gripping portion may be provided on one or both of the pair of second side surfaces 13.

[0019] As shown in FIG. 1, the gripping portion 15 may be provided at a position on the first side surface 12 close to the upper surface 14. By arranging the gripping portion 15 near the upper part of the first side surface 12, it becomes easier for the operator to grip the packaging box 1 in a relatively natural posture. Also, since the gripping portion 15 is arranged at a position close to the upper surface 14, when the gripping portion 15 is folded inward above the inside of the box, it becomes easier for the end portion of the gripping portion 15 to abut against the inner wall of the upper surface 14.

[0020] The height direction position and dimensions of the gripping portion 15 may be appropriately set in consideration of the height of the packaging box 1, the outer diameter of the roll-shaped article to be accommodated, the weight, and the gripping property of the operator, etc.

[0021] FIG. 2 is an external perspective view showing the back side of the packaging box 1 illustrated in FIG. 1. From the viewpoint shown in FIG. 2, the upper surface 14 extends to the first side surface 12 side, and a part of the upper surface 14 functions as a flap-shaped lid.

[0022] In the example shown in FIG. 2, the length of the flap portion extending from the upper surface 14 to the first side surface 12 side is about 50 mm, and the length in the height direction of the gripping portion 15, that is, the length of the folding portion, is about 25 mm. Therefore, even if the gripping portion 15 is folded inward above the inside of the box, the end portion of the gripping portion 15 does not abut against the inner wall of the upper surface 14. Note that these dimensions are merely examples, and the present invention is not limited to these numerical values. On the side shown in FIG. 2, since the flap portion extending from the upper surface 14 overlaps the first side surface 12 side, the side surface structure of this portion is doubled. Therefore, even when the end portion of the gripping portion 15 does not abut against the inner wall of the upper surface 14, the strength around the gripping portion 15 may be sufficiently ensured due to the reinforcing effect of the flap portion.

[0023] Note that by setting the length of the folding portion of the gripping portion 15 to be longer or setting the length of the flap portion extending from the upper surface 14 to be shorter, a configuration can be adopted such that when the gripping portion 15 is folded on the side shown in FIG. 2, its end portion abuts against the inner wall of the upper surface 14.

[0024] Figure 3 is an enlarged view showing an example of the configuration and dimensions of the gripping portion 15. Note that the dimensions and shape shown in Figure 3 are examples only, and the present invention is not limited to these dimensions and shapes.

[0025] As shown in Figure 3, the gripping portion 15 may have a substantially oval shape. A notch 15a may be provided on a part of the outer shape of the gripping portion 15 to allow the gripping portion 15 to be separated from the first side surface 12. In addition, the folded portion of the gripping portion 15 may include folds 15b, 15d and a notch 15c. The aforementioned notch 15c may be positioned between the folds 15b and 15d. That is, in the example shown in Figure 3, the configuration of "fold 15b-notch 15c-fold 15d" may be arranged along the folded portion. By providing a notch 15c in the folded portion of the gripping portion 15 in this way, the gripping portion 15 can be easily bent in the desired direction when a worker pushes the gripping portion 15 from the outside to the inside and upward of the packaging box 1. In particular, since the packaging box 1 is expected to contain relatively large or heavy roll-shaped articles, the material constituting the box may be made of corrugated cardboard or the like, which has high strength. With such materials, it can be difficult to ensure sufficient folding ability with only simple folds.

[0026] In contrast, by providing folds 15b, 15d and notches 15c in the folded portion of the gripping portion 15, the local rigidity of the folded portion can be reduced, allowing the gripping portion 15 to be smoothly folded inward. Furthermore, by arranging the pair of folds 15b and 15d on both sides of the notches 15c, the folding position can be stabilized, and the deformation direction of the gripping portion 15 can be appropriately restricted.

[0027] In the example shown in Figure 3, the width dimension of the folded portion of the gripping part 15 may be approximately 90 mm, and the width dimension of the cut portion 15c may be approximately 40 mm. These dimensions may be set appropriately considering the strength of the material constituting the packaging box body 1, the ease of folding the gripping part 15, and the gripping comfort for the worker.

[0028] Figure 4 is a schematic diagram illustrating the folding operation of the gripping part 15.

[0029] As shown in Figure 4, the gripping portion 15 may be formed by punching out a part of the first side surface 12, and may be positioned so as to be substantially flush with the first side surface 12 in the normal state. Therefore, when the gripping portion 15 is not in use, the external shape of the packaging box 1 can be maintained without significantly changing the appearance of the first side surface 12. In addition, by making the gripping portion 15 substantially flush with the first side surface 12, it is possible to prevent the gripping portion 15 from coming into contact with other objects and being unexpectedly deformed during transport or loading.

[0030] During use, the operator can push the gripping portion 15 inward from the outside of the packaging box 1. The gripping portion 15 may have folded portions 15b, 15c, and 15d formed therein, and the gripping portion 15 may be folded upward inward from the box by rotating or bending around these folded portions.

[0031] As the gripping portion 15 is folded in, its tip moves upward and closer to the upper surface 14. When the gripping portion 15 is pushed in further, its tip comes into contact with the inner wall of the upper surface 14.

[0032] In this configuration, the gripping portion 15 is folded inward and upward, allowing the worker to place their fingers on the gripping portion 15 formed on the first side surface 12, thus making it easy to lift the packaging box 1. Furthermore, since it is not necessary to hold the entire box under the arm as in conventional designs, the ease of transporting heavy objects can be improved.

[0033] Furthermore, the gripping portion 15 may be positioned in a location that does not significantly obstruct the storage space for roll-shaped articles, thus maintaining the efficiency of the packaging space utilization while providing a gripping function.

[0034] Figure 5 shows the state in which a roll-shaped article 20 is contained in the packaging box 1. In Figure 5, the inner lid portion 19, which is difficult to see in Figures 1 and 2, is shown. This inner lid portion 19 is the part that extends upward from the first side surface 12 on the side opposite to the side where the flap portion is located, and is the part that is covered by the upper surface 14 which has the flap portion.

[0035] As shown in Figure 5, the rolled article 20 may be placed within the packaging space, and support members 21 may be provided at both ends of the rolled article 20. The support members 21 may have the function of holding the rolled article 20 in a predetermined position within the packaging box 1 and suppressing movement during transport. The support members 21 may be formed from, for example, a resin material, a foamed material, or a corrugated cardboard material.

[0036] Furthermore, as shown in Figure 5, a space may be formed between the outer circumference of the rolled article 20 and the inner wall of the packaging box 1. The gripping portion 15 may be positioned in a location corresponding to this space, and may be configured so that it does not come into contact with the rolled article 20 even when the gripping portion 15 is folded inward into the packaging box 1. This makes it possible to suppress the occurrence of surface damage, deformation, or indentations on the rolled article 20, even when the gripping portion 15 is formed.

[0037] Figure 6 is a schematic cross-sectional view showing the state in which the end of the gripping portion 15 abuts against the inner wall of the upper surface 14.

[0038] As shown in Figure 6, a roll of article 20 may be contained in the packaging space of the packaging box 1. The roll of article 20 may be arranged to extend along the longitudinal direction of the packaging box 1. The gripping portion 15 may be provided on the first side surface 12 and folded inward and upward from the outside of the box.

[0039] When the gripping portion 15 is folded in, the end of the gripping portion 15 moves toward the upper surface 14 and may come into contact with the inner wall of the upper surface 14. This contact may be a point contact or a line contact, and may vary as appropriate depending on the shape, material, thickness, and amount of folding of the gripping portion 15.

[0040] In this way, the end of the gripping portion 15 is supported by the inner wall of the upper surface 14, allowing a portion of the load applied to the gripping portion 15 to be transmitted to the upper surface 14. Therefore, even when an operator places their fingers on the gripping portion 15 and lifts the packaging box 1, the concentration of load around the base of the gripping portion 15 can be suppressed. As a result, local deformation, fracture, or deformation progression of the gripping portion 15 can be suppressed, and the strength around the gripping portion 15 can be improved.

[0041] Furthermore, the packaging box 1 may contain relatively heavy items, such as rolls of film. Therefore, by adopting a configuration in which the end of the gripping portion 15 is supported on the upper surface 14 side, the durability of the gripping portion 15 and the handling stability of the packaging box 1 during manual transport can be improved.

[0042] Figure 7 illustrates a modified gripping portion 15A, which is a modified version of the gripping portion 15. In Figure 7, the distance from the top surface 14 to the folded portion of the gripping portion 15A is smaller than the height of the gripping portion 15A, and the figure schematically shows a state in which the end of the gripping portion 15A comes into contact with the inner wall of the top surface 14 during the folding process.

[0043] As shown in Figure 7, when an operator pushes the gripping portion 15A from the outside of the packaging box 1 upwards and inwards, the gripping portion 15A may be folded inwards into the packaging box 1 while rotating or bending around the folding portion. As the gripping portion 15A folds, the end of the gripping portion 15A may move toward the upper surface 14.

[0044] Furthermore, if the gripping portion 15A is folded in by a predetermined amount or more, the end of the gripping portion 15A may reach the inner wall of the upper surface 14. In the example shown in Figure 7, a configuration is illustrated in which at least a part of the end of the gripping portion 15A abuts against the inner wall of the upper surface 14.

[0045] Although Figure 7 shows an example where the end of the gripping portion 15A abuts against the inner wall of the upper surface 14, the detailed deformation after abutment is not limited to this. For example, after the end of the gripping portion 15A abuts against the inner wall of the upper surface 14, it may further deform and bend to follow the inner wall of the upper surface 14, and at least a part of it may be in surface contact with the inner wall of the upper surface 14.

[0046] Figure 8 illustrates a gripping portion 15B in which at least a part of it is in surface contact with the inner wall of the upper surface 14, as described above. Specifically, Figure 8 is a schematic cross-sectional view showing the state in which the gripping portion 15B is folded and its end further deforms to make surface contact with the inner wall of the upper surface 14.

[0047] As shown in Figure 8, the gripping portion 15B may include a base portion 15B-1 and a tip portion 15B-2. The base portion 15B-1 is a portion formed continuously with respect to the first side surface 12 and may be the main part responsible for the folding operation of the gripping portion 15B. On the other hand, the tip portion 15B-2 is a portion provided on the tip side of the base portion 15B-1 and may function as the part responsible for contact with the upper surface 14.

[0048] When an operator pushes the gripping portion 15B from the outside of the packaging box 1 upwards and inwards, the gripping portion 15B may rotate or bend around the folded portion and be folded inwards into the packaging box 1. As the amount of folding increases, the end of the gripping portion 15B moves toward the upper surface 14, and the tip portion 15B-2 may reach the inner wall of the upper surface 14.

[0049] Furthermore, when the gripping portion 15B is pushed in, the tip portion 15B-2 may deform to conform to the inner wall of the upper surface 14. In the example shown in Figure 8, a state in which at least a part of the tip portion 15B-2 is in surface contact with the inner wall of the upper surface 14 is illustrated. Surface contact here may mean a contact form having a wider contact area compared to point contact or line contact, and the contact area may be appropriately set according to the shape, thickness, material and amount of fold of the tip portion 15B-2.

[0050] This configuration allows the load applied to the gripping portion 15B to be distributed more widely to the upper surface 14 via the tip portion 15B-2. Therefore, compared to the contact structure shown in Figures 6 and 7, load concentration can be further suppressed, and the occurrence of local deformation, breakage, or fatigue of the gripping portion 15B can be further reduced.

[0051] Furthermore, by positioning the tip portion 15B-2 along the inner wall of the upper surface 14, the overall posture of the gripping portion 15B is stabilized, which may improve the gripping sensation when the worker lifts the packaging box 1. In particular, stability and durability during gripping can be improved even when accommodating heavy roll-shaped items 20.

[0052] Note that the dimensions, shape, and boundary positions of the base portion 15B-1 and the tip portion 15B-2 are not limited to the example shown in Figure 8, and may be appropriately changed according to the required strength, the weight of the contents, and the dimensions of the packaging box 1.

[0053] Figure 9 is a schematic diagram showing an example of the cross-sectional structure of the wall portion constituting the packaging box 1.

[0054] As shown in Figure 9, the walls constituting each side of the packaging box 1 may have at least a three-layer structure including an outer wall 30, corrugated elements 40, and an inner wall 50. That is, the corrugated elements 40 may be placed between the outer wall 30 and the inner wall 50, sandwiched between them. Such a configuration may correspond to a general corrugated cardboard structure and may be used as a structure that can achieve both lightness and strength.

[0055] The corrugated element 40 may have a structure formed in a repeating wave pattern, and grooves 60 may be formed in its valleys. The grooves 60 may be formed continuously along the extending direction of the corrugated element 40. Due to its structural characteristics, the corrugated element 40 may have higher strength or rigidity in the direction in which the grooves 60 extend compared to the direction intersecting the extending direction of the grooves 60.

[0056] In this embodiment, it is assumed that the packaging boxes 1 may be stacked in multiple layers, and for example, they may be stacked vertically for storage or transport in a finished product warehouse, on pallets during delivery, or at a construction site. In this case, the packaging boxes 1 may be repeatedly subjected to vertical compressive loads.

[0057] Therefore, in this embodiment, the grooves 60 of the corrugated element 40 may be arranged to extend in the vertical direction, i.e., the longitudinal direction, when the packaging box 1 is in use. This allows for high load-bearing performance against compressive loads applied from the top surface to the bottom surface. For example, even when multiple packaging boxes 1 are stacked, buckling, deformation, or crushing of the walls can be suppressed.

[0058] Furthermore, since the packaging box 1 is expected to hold relatively heavy contents such as rolled articles 20, sufficient mechanical strength is required in the walls. As in this embodiment, by considering the orientation direction of the corrugated elements 40, it is possible to improve the overall strength of the packaging box 1 while maintaining a relatively simple structure.

[0059] Although Figure 9 illustrates a three-layer structure, the present invention is not limited thereto. For example, it may be a multi-layer corrugated cardboard structure including multiple corrugated elements 40, and may be modified as appropriate depending on the required strength, weight of contents, or transportation conditions.

[0060] Figure 10 is an external perspective view showing a modified packaging box 1A, which is a modified version of the packaging box 1.

[0061] As shown in Figure 10, the packaging box 1A comprises a bottom surface 11, a first side surface 12, a second side surface 13, a top surface 14, and a gripping portion 15C. The basic configuration of the packaging box 1A is the same as that of the packaging box 1 described above, but it differs mainly in the configuration around the gripping portion 15C.

[0062] In the example shown in Figure 10, a gripping portion 15C is provided on the first side surface 12, and an insertion opening 16 is provided on the top surface 14. The gripping portion 15C may be configured to fold inward and upward from the outside of the box, and when the gripping portion 15C is folded, a part of it is guided toward the insertion opening 16.

[0063] As described above, by providing an insertion opening 16 on the upper surface 14, the positioning of the gripping portion 15C when folding can be easily facilitated. Furthermore, by allowing a portion of the gripping portion 15C to be received by the insertion opening 16, the posture of the gripping portion 15C can be stabilized, and the gripping ability of the worker can be improved. Note that the shape, dimensions, and position of the insertion opening 16 are not limited to the example shown in Figure 10, and may be set as appropriate depending on the shape of the gripping portion 15C, the amount of folding, etc.

[0064] Figure 11 is a partially enlarged view showing an example of the folding operation of the gripping portion 15C shown in Figure 10, and an example of the dimensions around the gripping portion 15C. Note that the dimensions shown in Figure 11 are examples, and the present invention is not limited to these values.

[0065] As shown in Figure 11, the gripping portion 15C may be formed as part of the first side surface 12, or it may be configured to fold inward and upward from the outside of the box. The gripping portion 15C may have a fold 17, and when an operator pushes the gripping portion 15C, the gripping portion 15C may rotate or bend around the fold 17.

[0066] Furthermore, an insertion opening 16 may be provided on the upper surface 14. The insertion opening 16 may function as an opening to receive a part of the gripping portion 15C, for example, the tip portion of the gripping portion 15C, when the gripping portion 15C is folded. This makes it possible to stabilize the folding direction and the position of the gripping portion 15C after folding.

[0067] In the example shown in Figure 11, the width dimension of the gripping portion 15C may be approximately 120 mm. The width dimension of the insertion opening 16 may be approximately 40 mm, and the height dimension of the tip portion of the gripping portion 15C may be approximately 10 mm. Furthermore, the distance from the top surface 14 to the fold 17 and the height dimension of the gripping portion 15C may both be approximately 50 mm.

[0068] Due to these dimensional relationships, when the gripping portion 15C is folded inward and upward, a portion of the gripping portion 15C can be smoothly guided into the insertion opening 16. Furthermore, since the range of movement of the gripping portion 15C is restricted by the insertion opening 16, the posture of the gripping portion 15C after folding can be stabilized. This may improve the gripping ability and stability when an operator places their fingers on the gripping portion 15C and lifts the packaging box 1A.

[0069] The dimensions, shape, and position of the insertion opening 16 may be appropriately changed depending on the dimensions of the gripping portion 15C, the amount of folding, the thickness of the packaging box 1A, and the required gripping strength.

[0070] Figure 12 shows another variation relating to the tip shape of the gripping portion.

[0071] In the example shown in Figure 12, the tip of the gripping portion may have a mushroom-shaped widened end 18 instead of the aforementioned convex end. The widened end 18 may have a shape that expands outward in the width direction at the tip of the gripping portion, and may have a mushroom-like shape with a wide head. With such a configuration, when the gripping portion is folded, the widened end 18 may be guided more stably toward the upper surface 14, and the contact area with the inner wall described later may be increased, which may contribute to load distribution and improved strength of the gripping portion.

[0072] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications, substitutions, and improvements are possible without departing from the spirit of the present invention.

[0073] For example, the gripping parts 15, 15A, 15B, and 15C (collectively referred to as gripping parts in this specification) may be provided one on each of a pair of opposing first sides 12, and each gripping part may be positioned near the upper center of the first side 12. This allows the worker to place their fingers on the gripping parts from both sides of the packaging box 1 and lift the packaging box 1 stably. Furthermore, by positioning the gripping parts relatively high up, the posture during lifting can be improved, thereby enhancing work efficiency. The position of the gripping parts may be appropriately changed depending on the weight, dimensions, and center of gravity of the contents.

[0074] Furthermore, for example, the gripping portions may be arranged such that a gripping portion provided on one of a pair of opposing first side surfaces 12 is staggered against the gripping portion provided on the other first side surface 12. This configuration improves the freedom of placement of the gripping portions and enables flexible layout design according to the positional relationship with the contents, support members, or internal space inside the packaging box 1.

[0075] Furthermore, for example, the shape, dimensions, arrangement position, and number of gripping parts are not limited to the illustrated example and may be appropriately changed depending on the shape, weight, dimensions of the contents, or the intended use of the packaging box 1. The gripping parts may be provided only on the first side surface 12, or also on the second side surface 13, and may be arranged in multiple or alternating configurations.

[0076] Furthermore, the end shape of the gripping portion is not limited to a convex end, a widened end, or a mushroom-shaped end; it may be changed as appropriate as long as it is a shape that guides or supports the upper surface 14.

[0077] Furthermore, the constituent materials of the packaging box 1 are not limited to a corrugated cardboard structure, but may also include resin sheets, laminated sheets, foamed materials, or composite materials.

[0078] Furthermore, the contents of the packaging box 1 are not limited to roll-shaped film, but may also be sheet-shaped articles, tubular articles, long items, or other contents.

[0079] Furthermore, the embodiments and modifications described herein may be combined as appropriate, to the extent that they are not technically inconsistent. [Explanation of Symbols]

[0080] 1 Packaging box 11. Base 12 First aspect 13 Second aspect 14 Top side 15, 15A, 15B, 15C Grip 15a, 15c Notches 15b, 15d Folded section 15B-1 Base 15B-2 Tip 16 outlets 17 folds 18 Widening end 19. Inner lid section 20 Roll-shaped articles 21 Support member 30 Outer wall 40 wave-shaped elements 50 Inner wall 60 grooves

Claims

1. A packaging box, Rectangular base, A pair of first side surfaces extending along the long side of the base, A pair of second sides extending along the short side of the base, The packaging space defined by the bottom surface, the pair of first sides, and the pair of second sides, The upper surface that closes the aforementioned packaging space, Equipped with, The bottom surface, the pair of first sides, and the pair of second sides are continuous with each other via folds, and the top surface is continuous with at least one of the pair of first sides and the pair of second sides via folds. At least one of the pair of first sides is provided with at least one gripping portion that can be folded inward and upward from the outside of the box body. A packaging box in which, when at least one of the gripping portions is folded, its end contacts the inner wall of the upper surface.

2. The packaging box according to claim 1, wherein at least one gripping portion is provided on each of the pair of first sides facing each other.

3. The packaging box according to claim 1, wherein at least one of the pair of first sides is provided with two or more gripping portions.

4. The packaging box according to claim 1, wherein a roll-shaped article is contained in the packaging space, and the gripping portion is provided at a position corresponding to the space formed between the outer cross-sectional area of ​​the roll-shaped article and the inner wall of the packaging box.

5. The packaging box according to claim 1, wherein the gripping portion is provided with a fold formed along the folded portion.

6. The packaging box according to claim 5, wherein the folds include a pair of folds and a notch formed between the pair of folds.

7. The packaging box according to claim 1, wherein the material constituting the packaging box has a three-layer structure in which corrugated elements are arranged between the outer surface and the inner surface, and the groove direction of the corrugated elements extends along the direction from the top surface to the bottom surface.

8. The packaging box according to claim 1, wherein, when the gripping portion is not in use, the portion constituting the gripping portion is substantially flush with the first side surface.

9. The packaging box according to claim 1, wherein, when the gripping portion is folded, at least a portion of the end is bent so as to extend along the inner wall of the upper surface and makes surface contact with the inner wall of the upper surface.

10. The packaging box according to claim 1, wherein the gripping portion is formed by punching out a part of the first side surface.

11. A packaging box, Rectangular base, A pair of first side surfaces extending along the long side of the base, A pair of second sides extending along the short side of the base, The packaging space defined by the bottom surface, the pair of first sides, and the pair of second sides, The upper surface that closes the aforementioned packaging space, Equipped with, The bottom surface, the pair of first sides, and the pair of second sides are continuous with each other via folds, and the top surface is continuous with at least one of the pair of first sides and the pair of second sides via folds. On at least one of the pair of first sides, two or more gripping portions are provided that can be folded inward and upward from the outside of the box body. The gripping portion is provided with a pair of folds along the folded portion and a notch formed between the pair of folds. A packaging box in which, when at least one of the gripping portions is folded, its end contacts the inner wall of the upper surface.

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