Packaging materials

Abstract

To provide packaging material that enables easy packaging work.SOLUTION: Packaging material 1 comprises inner packaging material 10 and outer packaging material 20. The inner packaging material 10 has a bottom plate part 31 and a side plate part 42. An object G to be packaged is placed on the bottom plate part 31. The side plate part 42 is raised from the bottom plate part 31 to cover a side face of the object G to be packaged. The outer packaging material 30 has a peripheral wall part 80 and a flap part 90. The peripheral wall part 80 is opened upward and downward. The flap part 90 extends from an upper end of the peripheral wall part 80 and is bent inward to close an upper-end opening of the peripheral wall part 80. The inner packaging material 10 has a suspension part 43. The suspension part 43 is provided at an upper end part of the side plate part 42 and hooked to the flap part 90.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to packaging materials. [Background technology]

[0002] Patent Document 1 discloses a conventional packaging material. This packaging material includes a bottom tray and an exterior material. The bottom tray is used to place the packaged item. The bottom tray has front and rear side walls. The front and rear side walls cover the sides of the packaged item. The exterior material has front, rear, left and right side walls and a top lid provided at the upper ends of these side walls. The exterior material has insertion sections in the vertical middle of the side walls. Ear sections provided on the front and rear side walls of the bottom tray are inserted into the insertion sections. In this packaging material, the bottom tray and the exterior material are connected by inserting and attaching the ear sections into the insertion sections provided on the front and rear side walls of the exterior material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-144142 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of Patent Document 1, the insertion sections are provided in the vertically middle sections of the front and rear side walls of the exterior material. Therefore, when inserting the ear sections into the insertion sections, it is necessary to insert one's hand from the upper opening of the exterior material to the vertically middle section to perform the work. This work is cumbersome.

[0005] The present disclosure has been made in consideration of the above-described conventional situation, and an object to be achieved is to provide a packaging material that allows easy packaging work. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a packaging material according to one embodiment of the present disclosure comprises an inner packaging material having a bottom plate portion on which the packaged item is placed and side plate portions that rise from the bottom plate portion and cover the sides of the packaged item, and an outer packaging material that covers the packaged item from above and has peripheral wall portions that open at the top and bottom and a flap portion that extends from the upper end of the peripheral wall portion and is bent inward to close the upper end opening of the peripheral wall portion, and the inner packaging material has a hanging portion that is provided at the upper end of the side plate portion and is hooked onto the flap portion. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view showing a packaging material according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing an inner packaging material according to the first embodiment. [Figure 3] FIG. 2 is an exploded perspective view showing the inner packaging material according to the first embodiment. [Figure 4] FIG. 1 is a development view showing a hanging pad according to a first embodiment. [Figure 5] 1 is a perspective view showing an outer packaging material according to the first embodiment. FIG. [Figure 6] 2 is a perspective view for explaining a peripheral wall portion, a flap portion, and a hanging portion according to the first embodiment. FIG. [Figure 7] 10 is a diagram for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the side plate portions are expanded in the front-rear direction of the bottom tray. FIG. [Figure 8] 10A and 10B are diagrams for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the side plate portions are in a folded state. [Figure 9] FIG. 9 is an enlarged view of a main part of FIG. 8, with a part cut away. [Figure 10] 10 is a diagram for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the support plate is inserted between the bottom tray and the inner tray. FIG. [Figure 11] 10 is a diagram for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the side plate portions are positioned relative to the support plates. FIG. [Figure 12]10 is a diagram for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the hook portion is hooked onto the side plate. FIG. [Figure 13] FIG. 13 is an enlarged view of a main part of FIG. [Figure 14] 1 is a diagram for explaining a packaging procedure using packaging materials according to the first embodiment, showing a state in which an outer packaging material is placed over an inner packaging material. FIG. [Figure 15] 1A and 1B are diagrams for explaining a packing procedure using the packing material according to the first embodiment, showing a state in which the front and rear flap portions are folded. DETAILED DESCRIPTION OF THE INVENTION

[0008] <Embodiment 1> As shown in FIG. 1, the packaging material 1 according to the first embodiment packages an item G to be packaged. The item G is a heavy item such as a ceramic toilet bowl. The packaging material 1 is made by assembling a plurality of components formed by folding cardboard sheets or the like. The packaging material 1 has a rectangular parallelepiped shape when the packaging of the item G shown in FIG. 1 is complete. The item G is packaged using only non-resin components, such as the cardboard packaging material 1, without using any resin components such as PP (polypropylene) bands.

[0009] In the following description, the front-to-back, left-to-right, and up-to-down directions of the packaging material 1 are based on the orientation of the packaging material 1 placed on a horizontal surface with the packaged item G packed inside. The front-to-back and left-to-right directions of the packaging material 1 are defined as the longitudinal and lateral directions of the packaging material 1 when viewed from above. The X-axis, Y-axis, and Z-axis shown in each diagram represent the front-to-back, left-to-right, and up-to-down directions, respectively. The positive directions of the X-axis, Y-axis, and Z-axis are defined as the front, left, and up, respectively.

[0010] 1, the packaging material 1 includes an inner packaging material 10 and an outer packaging material 20. The inner packaging material 10 and the outer packaging material 20 are combined with each other such that the outer packaging material 20 covers the inner packaging material 10 from above.

[0011] As shown in Figures 2 and 3, the inner packaging material 10 comprises a bottom tray 30, a hanging pad 40, an inner tray 50, a pair of front and rear protective pads 60, and a pair of left and right protective pads 70. The bottom tray 30 comprises a bottom plate portion 31 and an upright portion 32. The item G to be packed is placed on the bottom plate portion 31. The bottom plate portion 31 has a rectangular shape in a plan view that is long in the front-to-rear direction. The upright portion 32 rises upward from the four peripheral edges of the bottom plate portion 31. The bottom tray 30 is tray-shaped as a whole, consisting of the bottom plate portion 31 and the surrounding upright portions 32.

[0012] As shown in FIG. 3, a pair of hanging pads 40 are provided. The pair of hanging pads 40 are two members of the same shape. The pair of hanging pads 40 are connected in the front-to-rear direction. The pair of hanging pads 40 are attached to the underside of the bottom tray 30 by adhesive. The pair of hanging pads 40 are bent upward and stand up at portions extending in the front-to-rear direction from the front and rear ends of the bottom tray 30.

[0013] As shown in Fig. 4, the hanging pad 40 has a lower plate portion 41, side plate portions 42, and a hanging portion 43. The dot-dash lines shown in the developed view of Fig. 4 indicate fold lines. The hanging pad 40 can be folded at each fold line.

[0014] The lower plate portion 41 is attached by adhesive or the like to the underside of the bottom plate portion 31 that constitutes the bottom tray 30. The lower plate portion 41 forms an uneven portion 41A. The uneven portion 41A fits with the uneven portion 41A of the other hanging pad 40 that makes up the pair. The pair of hanging pads 40 are connected in the front-to-rear direction by fitting the uneven portions 41A of the respective hanging pads 40 together.

[0015] The side plate portions 42 rise from the front-rear end portions of the bottom tray 30 to cover the side surfaces of the packaged items G. The side plate portions 42 extend upward by being folded relative to the lower plate portion 41 at the fold lines between them. As shown in FIG. 4 , the side plate portions 42 form a folded portion 42A, a cut-and-raised portion 42B, and a handle hole 42C. The fold portion 42A is provided in the vertical middle portion of the side plate portion 42. The side plate portions 42 can be folded at this fold portion 42A. By folding the side plate portions 42 at the fold portion 42A, the upper end portion can be folded inward relative to the lower end portion. In this embodiment, two fold lines aligned vertically are formed on the fold portion 42A.

[0016] The cut-and-raised portions 42B are cut and raised inward to fit into hole portions 60A (described later) in the front and rear protective pads 60. The cut-and-raised portions 42B and hole portions 60A are examples of positioning portions according to the present disclosure. As shown in FIG. 4, the cut-and-raised portions 42B are cut and raised at H-shaped notches that vertically straddle the fold lines in the folded portion 42A. Two hand holes 42C are formed side by side on the left and right at the upper end of the side plate portion 42. The hand holes 42C are formed at positions that overlap with hand holes 60B (described later) in the front and rear protective pads 60 and hand holes 80A (described later) in the outer packaging material 20.

[0017] The hanging portions 43 are hooked onto flap portions 90 (described later) of the outer packaging material 20. As shown in FIG. 4, the hanging portions 43 are provided on the upper end portions of the side plate portions 42. A pair of hanging portions 43 are provided on the left and right end portions of the side plate portions 42. The pair of left and right hanging portions 43 are symmetrical to each other. In the unfolded hanging pad 40, the hanging portions 43 extend outward in the left and right directions from the left and right end portions of the upper end portions of the side plate portions 42. Each hanging portion 43 is folded along the fold line between the side plate portions 42 and the side plate portions 42, thereby extending along the front-to-rear direction.

[0018] The hanging portion 43 has an upper end portion 43A and a lower end portion 43B. The upper end portion 43A extends above the upper end of the side plate portion 42. The lower end portion 43B is continuous at its upper end with the lower end of the upper end portion 43A and is continuous at its front-to-rear end portion with the left and right ends of the side plate portion 42. The hanging portion 43 can be folded along a fold line formed between the upper end portion 43A and the lower end portion 43B and parallel to the horizontal direction.

[0019] 4, the hanging portion 43 has a notch 43C and a hook portion 43D. The notch 43C is formed on the side surface of the upper end portion 43A of the hanging portion 43. The notch 43C is formed by depressing the side surface of the hanging portion 43 into a V-shape. The notch 43C can be temporarily fastened to a temporary fastening portion 53 of the inner tray 50, which will be described later.

[0020] The hook portions 43D are formed at the front and rear ends of the upper end portion 43A of the hanging portion 43, on the end opposite the end on the side plate portion 42 side. The hook portions 43D are formed in a hook shape that opens downward. The hook portions 43D are hooked onto the upper edges of the left and right protective pads 70 of the inner packaging material 10 before it is covered with the outer packaging material 20 (see FIG. 2). As a result, the inner packaging material 10 holds the hanging portion 43 in a state where it is bent relative to the side plate portion 42 and extends in the front-to-rear direction.

[0021] The inner tray 50 is fitted into the bottom tray 30. In this embodiment, the packaged item G is placed on the bottom plate portion 31 of the bottom tray 30 via the inner tray 50. As shown in FIG. 3 , the inner tray 50 has an inner bottom plate portion 51, inner upright portions 52, and temporary fastening portions 53. The inner bottom plate portion 51 is placed on top of the bottom plate portion 31 of the bottom tray 30. The inner upright portions 52 rise upward from the front, rear, left, and right peripheral edges of the inner bottom plate portion 51. Each inner upright portion 52 is positioned to overlap the inner peripheral surface of the upright portion 32 of the bottom tray 30. When the inner tray 50 is fitted into the bottom tray 30, front and rear protective pads 60 and left and right protective pads 70 are inserted between each inner upright portion 52 and the upright portions 32 of the bottom tray 30. When the inner tray 50 is fitted into the bottom tray 30, a rectangular space in plan view is formed between the four corners of the inner tray 50 and the upright portions 32 of the bottom tray 30. Support posts 61 (described later) of the front and rear protective pads 60 are inserted into this space.

[0022] As shown in FIG. 3 , the temporary fastening portions 53 extend convexly outward in the left-right direction from the upper ends of the left and right inner upright portions 52. The temporary fastening portions 53 are temporarily fastened to the notches 43C of the hanging portions 43. Specifically, the temporary fastening portions 53 are hooked by inserting the hanging portions 43 into the gaps between the upright portions 32 and the inner upright portions 52 of the side plate portions 42 in the folded state. This allows the temporary fastening portions 53 to maintain the folded state of the side plate portions 42. The temporary fastening portions 53 can be easily released from the hooks of the notches 43C by applying a pushing force to the hanging portions 43. A folding line (not shown) is formed at the base end of the temporary fastening portions 53. The temporary fastening portions 53 are bent along the folding line by applying an upward pulling force to the hanging portions 43. This allows temporary fastening portion 53 to easily release itself from being caught in notch portion 43C. Whether hanging portion 43 is pushed in or pulled out, temporary fastening portion 53 can easily release itself from being caught in notch portion 43C, and functions suitably as a temporary fastener.

[0023] The front and rear protective pads 60 and the left and right protective pads 70 are each an example of a second side plate portion according to the present disclosure. That is, the protective pads 60, 70 are disposed between a pair of front and rear side plate portions 42 of the inner packaging material 10. The protective pads 60, 70 cover the sides of the packaged item G to protect the packaged item G. The protective pads 60, 70 also function as reinforcing materials that receive compressive forces in the vertical direction of the packaging material 1. The front and rear protective pads 60 and the left and right protective pads 70 are disposed to extend in directions that intersect with each other. The protective pads 60, 70 also function as reinforcing materials against forces that act horizontally in each of the front, rear, left and right directions.

[0024] As shown in FIG. 3 , the front and rear protective pads 60 each include a pair of left and right support columns 61 and a connecting plate 62 connecting the pair of support columns 61. The pair of support columns 61 are shaped like columns extending vertically. The pair of support columns 61 are formed into a rectangular column shape by bending the left and right edges of the connecting plate 62 inward multiple times. The pair of support columns 61 are inserted into pairs of left and right spaces inside the bottom tray 30 and at the four corners of the inner tray 50. The connecting plate 62 is inserted into the gaps between the front and rear upright portions 32 of the bottom tray 30 and the front and rear inner upright portions 52 of the inner tray 50. As shown in FIG. 2 , the height of the upper ends of the front and rear protective pads 60 inserted into the gaps between the bottom tray 30 and the inner tray 50 in the assembled state is equal to the height of the upper ends of the side plate portions 42.

[0025] The connecting plate 62 has a hole 60A and a handle hole 60B. The cut-and-raised portion 42B of the side plate 42 is fitted into the hole 60A. The hole 60A is formed in a rectangular hole shape in the middle of the connecting plate 62 in the up-down direction, corresponding to the position of the cut-and-raised portion 42B of the side plate 42. The cut-and-raised portion 42B of the side plate 42 is fitted into the hole 60A, thereby positioning the protective pad 60 with the side plate 42 overlapping the protective pad 60. In other words, the hole 60A functions as a positioning portion according to the present disclosure together with the cut-and-raised portion 42B. The handle hole 60B is formed to correspond to the position of the handle hole 42C of the side plate 42. Two handle holes 60B are formed side by side on the left and right at the upper end of each connecting plate 62.

[0026] As shown in Fig. 3, the pair of left and right protective pads 70 are each flat cardboard plates having a rectangular outer shape. The protective pads 70 are inserted into the gaps between the left and right upright portions 32 of the bottom tray 30 and the left and right inner upright portions 52 of the inner tray 50. As shown in Fig. 2, the height of the upper ends of the protective pads 60 in the assembled state inserted into the gaps between the bottom tray 30 and the inner tray 50 is equal to the height of the upper ends of the side plate portions 42. Before the inner packaging material 10 is covered with the outer packaging material 20, the protective pads 70 are hooked onto the hook portions 43D of the hanging portions 43.

[0027] The outer packaging material 20 covers the packaged item G from above. When the outer packaging material 20 packages the packaged item G, it has a box-like shape that opens downward. As shown in FIG. 5 , the outer packaging material 20 has a peripheral wall portion 80 and a flap portion 90. The peripheral wall portion 80 has a rectangular tubular shape that opens at the top and bottom. The peripheral wall portion 80 is formed by connecting a pair of front and rear peripheral walls 81 and a pair of left and right peripheral walls 82 in the circumferential direction. As a result, the peripheral wall portion 80 has a rectangular outer shape in a plan view. The peripheral wall portion 80 has handle holes 80A. The handle holes 80A are formed in each of the front and rear peripheral walls 81. The handle holes 80A are formed to correspond to the positions of the handle holes 42C in the side plate portion 42. Two handle holes 80A are formed side by side on the left and right at the upper end of each peripheral wall 81.

[0028] The flap portion 90 extends from the upper end of the peripheral wall portion 80. The flap portion 90 closes the upper end opening of the peripheral wall portion 80 by being folded inward. The flap portion 90 has a pair of front and rear flaps 91 and a pair of left and right flaps 92. Each of the flaps 91, 92 extends from the upper end of each of the four peripheral walls 81, 82 of the peripheral wall portion 80. The flap portion 90 is folded so that the pair of front and rear flaps 91 are positioned on the inside and the pair of left and right flaps 92 are positioned on the outside. As shown in FIG. 1 , the front and rear flaps 91 have the hanging portion 43 hooked thereon when in the folded state. The left and right flaps 92 cover the hanging portion 43 hooked to the front and rear flaps 91 from above.

[0029] 5 and 6, the front and rear flaps 91 form openings 91A. The hanging portion 43 is passed through the openings 91A. In the present embodiment, the openings 91A are formed by cutting out the left and right end portions of the front and rear flaps 91 at their tip ends so that the width is narrower than that at their base ends. The openings 91A are formed by cutting out the entire length of the flaps 91, from the tip ends of the flaps 91 to the vicinity of the fold line between the flaps 91 and the peripheral wall 81.

[0030] The packaging of the object G to be packed using the packaging material 1 configured as described above will now be described. When packaging the object G using the packaging material 1, the object G is placed on the bottom tray 30. At this time, if the side plate portions 42 are spread out in the front-to-rear direction of the bottom tray 30 as shown in FIG. 7, it takes up space and is difficult to handle on a production line. In contrast, by bending the side plate portions 42 as shown in FIG. 8, the packaging material 1 can be made compact by preventing the side plate portions 42 from spreading out. This improves the workability of the packaging material 1 during packaging.

[0031] To fold the side plate 42, the upper end of the side plate 42 is bent inward, and the hanging portion 43 is inserted into the gap between the bottom tray 30 and the inner tray 50. At this time, as shown in FIG. 8 , the notch 43C of the hanging portion 43 is hooked onto the temporary fastening portion 53 provided on the inner tray 50. In the folded state, the side plate 42 is bent at the bending portion 42A. In this embodiment, two fold lines are formed at the bending portion 42A, which allows for a smaller bending angle per fold line compared to a case where there is only one fold line. This disperses the elastic repulsive force of the cardboard generated at the bent portion. As a result, even the relatively weak holding force generated by the hooking of the temporary fastening portion 53 and the notch 43C does not release the state, and the side plate 42 can be well held in the folded state. In the folded state, the side plate 42 is lower in height than when it is standing upright from the bottom tray 30. In this respect, the packaging material 1 also aims to improve ease of packaging work.

[0032] After the packaged items G are placed on the bottom tray 30, the engagement between the temporary fastening portions 53 and the notches 43C is released, and the hanging portions 43 are removed from the gap between the bottom tray 30 and the inner tray 50. This exposes both front-to-rear end portions of the bottom tray 30 that were hidden by the upper portions of the bent side plates 42. After both front-to-rear end portions of the bottom tray 30 are exposed, a pair of front and rear protective pads 60 serving as second side plates are placed between the pair of front and rear side plates 42. Specifically, as shown in FIG. 10 , the protective pads 60 are inserted between the upright portions 32 of the bottom tray 30 and the inner upright portions 52 of the inner tray 50, at both front-to-rear end portions of the bottom tray 30. As shown in FIG. 11 , the side plates 42 are raised toward the inserted protective pads 60, and the cut-out portions 42B are fitted into the holes 60A of the protective pads 60. This positions the side plate 42 and the protective pad 60 in an overlapping state. In this state, the side plate 42 is held upright without falling over due to the action of the raised portions 42B fitted into the holes 60A.

[0033] A pair of left and right protective pads 70 serving as second side plates are disposed between the pair of front and rear side plates 42. Specifically, as shown in FIG. 11 , the protective pads 70 are inserted at both left and right ends of the bottom tray 30, between the upright portions 32 of the bottom tray 30 and the inner upright portions 52 of the inner tray 50. The protective pads 70 may be disposed between the pair of side plates 42 at the same time as the protective pads 60 are disposed between the pair of side plates 42, i.e., before the cut-and-raised portions 42B of the side plates 42 are fitted into the holes 60A. The protective pads 60 and 70 function as members for ensuring strength.

[0034] As shown in FIG. 12, the hooking portion 43D of the hanging portion 43 is hooked onto the protective pad 70 serving as the second side plate portion. As a result, the hanging portion 43 is folded along the fold line between the hanging portion 43 and the side plate portion 42, and is held in a state substantially perpendicular to the side plate portion 42. By hooking the hooking portion 43D onto the protective pad 70, the side plate portion 42 is more securely held in an upright state. The hanging portion 43 is arranged to extend along the front-to-rear direction at the four corners of the upper end portion of the inner packaging material 10. In this embodiment, the hooking portion 43D is formed into a hook shape that opens downward, as shown in FIG. 13. Therefore, the hooking portion 43D can be easily hooked onto the upper edge of the protective pad 70.

[0035] 14, the outer packaging material 20 is placed over the inner packaging material 10 while being hooked onto the protective pad 70. At this time, the inner packaging material 10 is held in a state in which the hanging portions 43 are bent relative to the side plate portions 42 and extended in the front-to-rear direction because the hooking portions 43D are hooked onto the protective pad 70. Therefore, when the outer packaging material 20 is placed over the inner packaging material 10, it is prevented from getting caught on the hanging portions 43, making it easy to place the outer packaging material 20 over the inner packaging material 10.

[0036] When the outer packaging material 20 is placed over the inner packaging material 10, the hanging portions 43 function as guides for guiding the lower end of the outer packaging material 20. As described above, the hanging portions 43 protrude upward beyond the upper ends of the side plate portions 42 and the front, rear, left, and right protective pads 60, 70. Therefore, when the outer packaging material 20 is placed over the inner packaging material 10 from above, the lower end of the outer packaging material 20 first comes into contact with the hanging portions 43. By inserting the upper ends 43A of the hanging portions 43 into the inside of the outer packaging material 20, the inner circumferential surface of the outer packaging material 20 is guided downward along the hanging portions 43, and the upper ends of the side plate portions 42 and the front, rear, left, and right protective pads 60, 70 can be easily inserted into the outer packaging material 20.

[0037] The outer packaging material 20 is firmly lowered so that the lower end of the peripheral wall 80 reaches the lower ends of the bottom tray 30 and the side plates 42, so as to cover the entire inner packaging material 10. When the lower end of the peripheral wall 80 is firmly lowered to the lower ends of the bottom tray 30 and the side plates 42, the upper end 43A of the hanging portion 43 protrudes above the upper edge of the peripheral wall 80 of the outer packaging material 20, as shown in FIG.

[0038] 14, in the state where the outer packaging material 20 covers the inner packaging material 10, the handle hole 80A formed in the peripheral wall 80 of the outer packaging material 20 is aligned with the handle hole 42C in the side plate 42 and the handle hole 60B in the protective pad 60. When the packaging material 1 is lifted, hands are inserted into the handle holes 42C, 60B, and 80A formed in these three components, and the hands are placed on the three components of the side plate 42, the protective pad 60, and the peripheral wall 80. Therefore, the load applied when the packaging material 1 is lifted is distributed among the three components, and damage to the packaging material 1 is suppressed.

[0039] As shown in Fig. 15, of the two pairs of flaps 91, 92 in the flap portion 90, the front and rear pair of flaps 91 are folded inward. The flaps 91 form an opening 91A. Therefore, when the flaps 91 are folded, they are prevented from coming into contact with the hanging portion 43. By folding the flaps 91 inward, the hanging portion 43 is suitably passed through the opening 91A, and is arranged above and below the flap 91 in the folded state.

[0040] After the pair of front and rear flaps 91 are folded inward, the pair of left and right flaps 92 are also folded inward (see FIG. 1). The folded flap 92 is placed on top of the pair of front and rear flaps 91. When the flap 92 is folded inward, the hanging portion 43 is pressed against the flap 92 and folded together with the flap 92. The upper end portion 43A of the folded hanging portion 43 is hooked onto the upper surfaces of the pair of front and rear flaps 91. Therefore, the inner packaging material 10 as a whole is suspended from the outer packaging material 20.

[0041] When the left and right flaps 92 are folded, the hanging portion 43 is pressed against the underside of the flap 92 and is sandwiched between the flaps 91 and 92. This securely holds the hanging portion 43 between the flaps 91 and 92. In this state, the inner and outer packaging materials 10 and 20 of the packaging material 1 are connected. To release the connection between the inner packaging material 10 and the outer packaging material 20, the left and right flaps 92 must be raised to release the hanging portion 43 from the flap 91. Therefore, the packaging material 1 can be sealed with adhesive tape, such as craft tape, at the seams between the left and right flaps 92 to prevent unauthorized opening. Since the packaging material 1 cannot be accessed by the packaged item G without removing the sealing adhesive tape, whether the packaging material 1 has been opened or not can be clearly determined by checking for any traces of the adhesive tape being removed.

[0042] As described above, the packaging material 1 according to the first embodiment includes the inner packaging material 10 and the outer packaging material 20. The inner packaging material 10 includes the bottom tray 30 having the bottom plate portion 31 and the hanging pad 40 having the side plate portion 42. The item G to be packed is placed on the bottom plate portion 31. The side plate portion 42 rises from the bottom plate portion 31 and covers the side surface of the item G to be packed. The outer packaging material 20 includes a peripheral wall portion 80 and a flap portion 90. The peripheral wall portion 80 opens at the top and bottom. The flap portion 90 extends from the upper end of the peripheral wall portion 80 and is folded inward to close the upper end opening of the peripheral wall portion 80. The inner packaging material 10 includes a hanging portion 43. The hanging portion 43 is provided at the upper end of the side plate portion 42 and is hooked onto the flap portion 90.

[0043] In this way, the packaging material 1 can easily connect the inner packaging material 10 and the outer packaging material 20 by hooking the hanging portion 43 onto the flap portion 90 without using a binding member such as a PP band. Therefore, the packaging material 1 can be easily packed.

[0044] In the packaging material 1, the flap portion 90 is provided with a pair of front and rear flaps 91 and a pair of left and right flaps 92. The hanging portion 43 is hooked onto the front and rear flaps 91 in a folded state and is covered from above by the left and right flaps 92 in a folded state. With this configuration, the packaging material 1 has the hanging portion 43 sandwiched between the flaps 91 and 92 from above and below. Therefore, the hanging portion 43 is firmly held by the flap portion 90, easily realizing a strong connection between the inner packaging material 10 and the outer packaging material 20. With the above configuration, the packaging material 1 cannot be opened without again raising the left and right flaps 92 that cover the hanging portion 43 from above. Therefore, whether the packaging material 1 has been opened or not can be easily determined by sealing the seams of the left and right flaps 92 with adhesive tape.

[0045] In the packaging material 1, the front and rear flaps 91 form openings 91A through which the hanging parts 43 pass. Therefore, in the packaging material 1, the hanging parts 43 can be easily hooked onto the flaps 91.

[0046] In the packaging material 1, the side plate portions 42 are provided in pairs at both the front and rear ends of the bottom plate portion 31. The inner packaging material 10 has protective pads 60, 70 as second side plate portions disposed between the pair of side plate portions 42. Therefore, compared to a case where only the side plate portions 42 are provided and the protective pads 60, 70 are not provided, the strength can be improved.

[0047] In the packaging material 1, the hanging portion 43 has a hooking portion 43D. The hooking portion 43D is hooked onto the protective pad 70, which serves as the second side plate portion, before the inner packaging material 10 is covered with the outer packaging material 20. Therefore, the packaging material 1 can hold the hanging portion 43 with the hooking portion 43D hooked onto the protective pad 70. In the case of this embodiment, this hooked state is a state in which the hanging portion 43 is bent relative to the side plate portion 42, and the inner packaging material 10 can be covered with the outer packaging material 20 without being obstructed by the hanging portion 43. Because the packaging material 1 can maintain this state, the task of covering the inner packaging material 10 with the outer packaging material 20 can be easily performed.

[0048] In the packaging material 1, the inner packaging material 10 has a cut-and-raised portion 42B and a hole 60A as positioning portions. The cut-and-raised portion 42B and the hole 60A position one of the pair of side plate portions 42 and the protective pad 60 serving as the second side plate portion when they are arranged overlapping each other. Therefore, the packaging material 1 can be easily arranged overlapping the side plate portion 42 and the protective pad 60 with the side plate portion 42 and the protective pad 60 positioned.

[0049] In the packaging material 1, the side plate portions 42 are provided in pairs at the front and rear ends of the bottom plate portion 31, and the hanging portions 43 extend upward from the left and right ends of each pair of side plate portions 42. Therefore, the packaging material 1 can easily be provided with the hanging portions 43.

[0050] In the packaging material 1, the side plate 42 has a folding portion 42A that can be folded inward with respect to the lower portion. The inner packaging material 10 has a temporary fastening portion 53 that temporarily fastens the side plate 42 in the folded state. Because the packaging material 1 allows the side plate 42 to be folded at the folding portion 42A, the space required for packaging work can be kept small compared to work that does not require folding the side plate 42. Because the packaging material 1 allows the side plate 42 to be temporarily fastened in the folded state by the temporary fastening portion 53, the folded state of the side plate 42 can be reliably maintained.

[0051] Two fold lines are formed in the folding portion 42A of the packaging material 1. Therefore, compared to when there is only one fold line, the folding portion 42A can disperse the repulsive force that acts in the direction in which the side plate portion 42 returns to its original state when in the folded state, making it easier to maintain the folded state of the side plate portion 42.

[0052] The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.

[0053] The shapes, sizes, and component configurations of the inner and outer packaging materials are not limited to those exemplified in the above embodiments. The inner packaging material may, for example, have a bottom plate and side plate portions integrally formed as a single member. The bottom plate may be one on which the packaged item is placed indirectly via another member, as in the above embodiment, or one on which the packaged item is placed directly.

[0054] The configuration, arrangement, shape, number, and manner in which the hanging portion is hooked onto the flap portion are not limited to those in the above embodiment. The hanging portion may be provided, for example, extending upward from the upper end of the side plate portion. It is not essential that the hanging portion have a hook portion, a notch portion, or the like as a portion temporarily fastened to the temporary fastening portion.

[0055] It is not essential that the flap portion forms an opening. The hanging portion may be, for example, hooked onto the outer edge of the flap portion. When the flap portion forms an opening, the shape, size, etc. of the opening are not particularly important as long as the opening is formed in the flap portion and the hanging portion can be passed through it. The opening is not limited to the notch-shaped opening exemplified in the above embodiment, and may be, for example, a closed opening such as a hole or a slit.

[0056] It is not essential that the inner packaging material has the second side plate portion. If the inner packaging material has the second side plate portion, the shape, configuration, number, etc. thereof are not limited to those in the above embodiment.

[0057] It is not essential that the inner packaging material has a positioning portion. If the inner packaging material has a positioning portion, the configuration thereof is not limited to the configuration having the cut-and-raised portion and the hole portion exemplified in the above embodiment.

[0058] It is not essential that the side plate portion has a folding portion. If the side plate portion has a folding portion on which a folding line is formed, the number of folding lines may be one, or may be three or more. [Explanation of symbols]

[0059] 1...packaging material, 10...inner packaging material, 20...outer packaging material, 31...bottom plate portion, 42...side plate portion, 42A...folded portion, 42B...cut-out portion (positioning portion), 43...hanging portion, 43A...upper end of hanging portion, 43D...hook portion, 53...temporary fastening portion, 60...front and rear protective pads (second side plate portion), 60A...hole portion (positioning portion), 70...left and right protective pads (second side plate portion), 80...periphery wall portion, 90...flap portion (91...pair of front and rear flaps, 92...pair of left and right flaps), 91A...opening, G...packed item

Claims

1. an inner packaging material having a bottom plate portion on which an object to be packed is placed and side plate portions rising from the bottom plate portion and covering the side surfaces of the object to be packed; an outer packaging material that covers the packaged item from above and has a peripheral wall portion that opens at the top and bottom, and a flap portion that extends from the upper end of the peripheral wall portion and is folded inward to close the upper end opening of the peripheral wall portion; It is equipped with the inner packaging material has a hanging portion provided at an upper end of the side plate portion and hooked onto the flap portion, The packaging material, in a folded state, the hanging portion is hooked onto the upper surface of the folded flap portion.

2. The flap portions are provided in two pairs, one pair in the front and rear and one pair in the left and right, The packaging material according to claim 1 , wherein the hanging portions are hooked onto the front and rear flap portions in the folded state and are covered from above by the left and right flap portions in the folded state.

3. The packaging material according to claim 2 , wherein the front and rear flap portions form openings through which the hanging portions are passed.

4. the side plate portions are first side plate portions provided in pairs at at least one of the front and rear end portions and the left and right end portions of the bottom plate portion, The packaging material according to claim 1 , wherein the inner packaging material has a second side plate portion disposed between the pair of first side plate portions.

5. The packaging material according to claim 4 , wherein the hanging portion has a hook portion that is hooked onto the second side plate portion before the inner packaging material is covered with the outer packaging material.

6. The packaging material according to any one of claims 4 to 5, wherein the inner packaging material has a positioning portion that positions one of the pair of first side plate portions and the second side plate portion in an overlapping state.

7. The side plate portions are provided in pairs at both front and rear ends of the bottom plate portion, The packaging material according to claim 1 , wherein the hanging portions extend upward from both left and right end portions of the pair of side plate portions.

8. the side plate portion has a bending portion that can be bent into a bent state in which an upper end portion is bent inward relative to a lower end portion, The packaging material according to any one of claims 1 to 7, wherein the inner packaging material has temporary fastening portions that temporarily fasten the side plate portions in the folded state.

9. The packaging material according to claim 8, wherein two fold lines are formed in the folded portion.

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