Packaging cushioning material and packaging structure

Abstract

To provide a packaging cushioning material that allows for the selection of cushioning strength for each part of the receiving surface depending on the receiving surface of the item to be cushioned and the balance of its center of gravity, and that is easy to assemble, lightweight, and inexpensive. [Solution] The packaging cushioning material 2 is a component for supporting the item to be cushioned 5. The packaging cushioning material 2 consists of multiple laminated corrugated cardboard three-dimensional cushioning materials 4, which are made by stacking corrugated cardboard 3 in a three-dimensional shape, arranged to support the item to be cushioned 5 with surfaces having compression characteristics corresponding to the cushioning strength. The laminated corrugated cardboard three-dimensional cushioning material 4 is standardized into a predetermined three-dimensional shape.

Description

[[TECHNICAL FIELD]]

[0001] The present invention relates to a packaging cushioning material that supports a buffered article and a packaging structure. [[BACKGROUND ART]]

[0002] Generally, when packaging image forming apparatuses such as printers, copiers, and facsimile machines, as well as household electrical appliances, a cushion member made of a foamed material is used as a cushioning material. However, in recent years, de-plasticization and plastic reduction efforts, which aim to reduce the usage of plastic products considered to be a cause of marine pollution, have been carried out worldwide. For this reason, the replacement of plastic cushion members, which are widely used as packaging cushioning materials, with paper cushioning materials has been promoted.

[0003] As examples of structures that support a buffered article using a paper cushioning material such as corrugated fiberboard, the cushioning materials described in Patent Documents 1 and 2 are known.

[0004] The cushioning material described in Patent Document 1 is a member for placing a buffered article (product). The cushioning material consists of a cross-grain laminated corrugated fiberboard having cushioning properties on which the buffered article is placed, a vertical-grain laminated corrugated fiberboard disposed below the laminated corrugated fiberboard, and a plate-shaped corrugated fiberboard covering the vertical-grain laminated corrugated fiberboard having pressure resistance.

[0005] The cushioning material described in Patent Document 2 is a member interposed between the bottom of a box that accommodates a buffered article (article) and a corner portion of the bottom of the buffered article. The cushioning material is obtained by processing a corrugated fiberboard block (corrugated fiberboard structure) formed by laminating and adhering a large number of plate-shaped corrugated fiberboards. The cushioning material uses the vertical surface of the laminated corrugated fiberboard as a pressure-receiving surface, and has a receiving portion formed by shearing the laminated corrugated fiberboard and opening the pressure-receiving surface. On the bottom surface of the receiving portion, there are gathers formed into a pleated shape by compressing the corrugated fiberboard. [[PRIOR ART DOCUMENTS]] [[PATENT DOCUMENTS]]

[0006] [Patent Document 1] Japanese Patent Publication No. 2005-186988 [Patent Document 2] Japanese Patent Publication No. 2005-162244 [Overview of the project] [Problems that the invention aims to solve]

[0007] As described in Patent Documents 1 and 2, when protecting heavy items from external impacts during transport using corrugated cardboard, a material made by laminating corrugated cardboard together is sometimes used. This cushioning material primarily supports the bottom surface of the item, and the strength of the cushioning is determined by the surface area it supports and the direction of the grain (vertical or horizontal) of the laminated corrugated cardboard.

[0008] However, when supporting items to be cushioned with cushioning material, there is a demand to vary the strength of the cushioning material to match the various shapes and conditions of the receiving parts on the items to be cushioned. Furthermore, since this laminated corrugated cardboard requires multiple sheets to create the shape, and the area receiving the load differs depending on the size and location of the item being cushioned, it is desirable to cut the corrugated cardboard to match the shape of the item being cushioned and form the cushioning material accordingly. However, this increases the amount of processing and gluing work required to match the number of laminated sheets, which leads to increased labor costs and other problems.

[0009] Furthermore, if cushioning material is placed vertically across the entire bottom surface of the item to be cushioned, the bottom surface may deform with the three-dimensional support near the center as the pivot point, or the item to be cushioned may sway in the frequency range of vibrations during transport, potentially leading to it tipping over in the worst case.

[0010] This invention has been made in view of the above-mentioned problems, and aims to provide a packaging cushioning material and packaging structure that allows for the selection of the cushioning strength of the receiving surface for each part depending on the receiving surface of the item to be cushioned and the balance of the center of gravity, and that is easy to assemble, lightweight, and inexpensive. [Means for solving the problem]

[0011] The present invention, which solves the aforementioned problems, has the following configuration. (1) A packaging cushioning material for supporting an item to be cushioned, wherein a plurality of laminated corrugated cardboard three-dimensional cushioning materials, which are made by stacking corrugated cardboard in a three-dimensional shape, are arranged to support the item to be cushioned on surfaces having compression characteristics corresponding to the cushioning strength of the item to be cushioned.

[0012] (2) The packaging cushioning material according to claim 1, wherein the laminated corrugated cardboard three-dimensional cushioning material is standardized into a predetermined three-dimensional shape.

[0013] (3) The packaging cushioning material according to claim 1, wherein the laminated corrugated cardboard three-dimensional cushioning material is arranged in a combination of the compression characteristics of each surface.

[0014] (4) The packaging cushioning material according to any one of claims 1 to 3, wherein the laminated corrugated cardboard three-dimensional cushioning material is positioned by three-dimensional holding members that are previously placed on the bottom or sides of the item to be cushioned.

[0015] (5) The packaging cushioning material according to any one of claims 1 to 3, wherein the laminated corrugated cardboard three-dimensional cushioning material is a cube or a rectangular prism.

[0016] (6) The packaging cushioning material according to any one of claims 1 to 3, wherein the three-dimensional shape of the laminated corrugated cardboard three-dimensional cushioning material consists of a polyhedron having cut surfaces obtained by cutting the corners of the sides.

[0017] (7) The packaging cushioning material according to any one of claims 1 to 3, wherein the surface on which the laminated corrugated cardboard three-dimensional cushioning material supports the article to be cushioned is the surface in the grain direction of each of the cross-sections of the corrugated cardboard, the surface of each of the corrugated cardboard, and / or the surface in the cross-section of each of the corrugated cardboard that is parallel to the grain direction.

[0018] (8) A packaging structure comprising a packaging cushioning material for supporting a cushioned article, wherein: said packaging cushioning material is formed by arranging laminated corrugated cardboard three-dimensional cushioning materials obtained by laminating corrugated cardboards into a three-dimensional shape, and has varying buffer strengths imparted by respective surface compression characteristics; and the packaging structure further comprises a three-dimensional holding member disposed on a bottom surface or side surfaces of said cushioned article to position said cushioned article.

Effects of the Invention

[0019] According to the present invention, it is possible to provide a packaging cushioning material and a packaging structure which allow the cushioning strength of the receiving surface to be selected for each part depending on the receiving surface of the cushioned article and the center-of-gravity balance condition, are easy to assemble, lightweight and inexpensive. Brief Description of the Drawings

[0020] [Figure 1A] BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material used in a packaging cushioning material and a packaging structure according to a first embodiment of the present invention, showing a state where a vertical surface of the laminated corrugated cardboard three-dimensional cushioning material is used as a support surface for a cushioned article. [Figure 1B] Fig. 2 is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material used in a packaging cushioning material and a packaging structure according to the first embodiment of the present invention, showing a cross-grain corrugated cardboard three-dimensional cushioning material in which a horizontal surface of the laminated corrugated cardboard three-dimensional cushioning material is used as a support surface for a cushioned article. [Figure 1C] Fig. 3 is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material used in a packaging cushioning material and a packaging structure according to the first embodiment of the present invention, showing a flat corrugated cardboard three-dimensional cushioning material in which a flat surface of the laminated corrugated cardboard three-dimensional cushioning material is used as a support surface for a cushioned article. [Figure 2] Fig. 4 is a graph showing compression characteristics of the laminated corrugated cardboard three-dimensional cushioning material used in the packaging cushioning material and the packaging structure according to the first embodiment of the present invention. [Figure 3A] Fig. 5 is a schematic front view showing the packaging cushioning material and the packaging structure according to the first embodiment of the present invention. [Figure 3B] Fig. 6 is a schematic side view showing the packaging cushioning material and the packaging structure according to the first embodiment of the present invention. [Figure 3C] Fig. 7 is a schematic bottom view showing the packaging cushioning material and the packaging structure according to the first embodiment of the present invention. [Figure 3D] This figure shows a packaging cushioning material and packaging structure according to the first embodiment of the present invention, and is a schematic plan view showing a three-dimensional holding member. [Figure 4A] This is a schematic perspective view showing Comparative Example 1, in which a laminated corrugated cardboard cushioning material is placed vertically on a three-dimensional support member. [Figure 4B] This is a schematic perspective view showing a packaging cushioning material and packaging structure according to a second embodiment of the present invention. [Figure 5A] This is a schematic perspective view showing Comparative Example 2, in which a laminated corrugated cardboard cushioning material is placed vertically on a three-dimensional support member. [Figure 5B] This is a schematic perspective view showing a packaging cushioning material and packaging structure according to a third embodiment of the present invention. [Figure 6A] This is a schematic front view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials are placed on the bottom surface of the item to be cushioned. [Figure 6B] This is a schematic side view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials are placed on the bottom surface of the item to be cushioned. [Figure 6C] This is a schematic bottom view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials are placed on the bottom surface of the item to be cushioned. [Figure 6D] This is a schematic plan view showing the installation state of Comparative Example 3 of a three-dimensional holding member for arranging two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials. [Figure 7A] This figure shows a packaging cushioning material and packaging structure according to a fourth embodiment of the present invention, and is a schematic front view showing an installation state in which one type of small-sized laminated corrugated cardboard three-dimensional cushioning material is placed on the bottom surface of the item to be cushioned. [Figure 7B] This figure shows a packaging cushioning material and packaging structure according to a fourth embodiment of the present invention, and is a schematic side view showing an installation state in which one type of small-sized laminated corrugated cardboard three-dimensional cushioning material is placed on the bottom surface of the item to be cushioned. [Figure 7C] This figure shows a packaging cushioning material and packaging structure according to a fourth embodiment of the present invention, and is a schematic bottom view showing an installation state in which one type of small-sized laminated corrugated cardboard three-dimensional cushioning material is placed on the bottom surface of the item to be cushioned. [Figure 7D]This figure shows a packaging cushioning material and packaging structure according to the fourth embodiment of the present invention, and is a schematic plan view showing the installation state of a three-dimensional holding member for arranging a single type of small-sized laminated corrugated cardboard three-dimensional cushioning material. [Figure 8A] This is a schematic perspective view of the main parts of the laminated corrugated cardboard three-dimensional cushioning material of Comparative Example 4, in which the casters of the cushioned item are interfering with the material. [Figure 8B] This figure shows a packaging cushioning material and packaging structure according to the fifth embodiment of the present invention, and is a schematic perspective view of the main parts of a laminated corrugated cardboard three-dimensional cushioning material that avoids interference with the casters of the item to be cushioned. [Modes for carrying out the invention]

[0021] [First Embodiment] Next, a first embodiment of the present invention will be described with reference to Figures 1A to 3D. For convenience, in the attached drawings, "front" refers to the front direction, "rear" to the rear direction, "left" to the left direction, "right" to the right direction, "up" to the vertically upward direction, and "down" to the vertically downward direction. In the following explanation, identical components will be denoted by the same reference numeral and their explanations will be omitted. First, before explaining the packaging cushioning material 2 and packaging structure 1, we will explain corrugated cardboard 3 and laminated corrugated cardboard three-dimensional cushioning material 4.

[0022] From Figure 1A to Figure 1C, it is assumed that the item to be cushioned 5 is placed above. Figure 1A is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material 4 used in the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention, and shows a vertical-grain corrugated cardboard three-dimensional cushioning material 41 with the vertical surface 4a of the laminated corrugated cardboard three-dimensional cushioning material 4 as the support surface for the item to be cushioned 5. In this case, the laminated corrugated cardboard three-dimensional cushioning material 4 supports the item to be cushioned 5 with the reaction force in the grain direction of the corrugated cardboard 3. Figure 1B is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material 4 used in a packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention, and shows a horizontally grained corrugated cardboard three-dimensional cushioning material 42 with the side surface 4b of the laminated corrugated cardboard three-dimensional cushioning material 4 as the support surface for the item to be cushioned 5. In this case, the laminated corrugated cardboard three-dimensional cushioning material 4 supports the item to be cushioned 5 with reaction forces in directions perpendicular to both the grain direction and the normal direction of the surface of each corrugated cardboard 3. Figure 1C is a perspective view showing a laminated corrugated cardboard three-dimensional cushioning material 4 used in a packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention, and shows a flat corrugated cardboard three-dimensional cushioning material 43 with the flat surface 4c of the laminated corrugated cardboard three-dimensional cushioning material 4 as the support surface for the item to be cushioned 5. In this case, the laminated corrugated cardboard three-dimensional cushioning material 4 supports the item to be cushioned 5 with reaction forces in the direction normal to the surface of each corrugated cardboard 3.

[0023] Cardboard As shown in Figures 1A to 1C, corrugated cardboard 3 is composed of a liner 31 made of multiple (two or more) flat sheets of paper that form the surface of the corrugated cardboard 3, and a core 32 made of corrugated core paper interposed between the liners 31, 31. In other words, corrugated cardboard 3 is made of three sheets of paper: a flat liner 31 placed on the front side, a corrugated core 32 that is glued underneath the liner 31 when viewed from the side, and a flat back liner 31 that is glued underneath the core 32.

[0024] The corrugated cardboard 3 formed in this way has a truss structure in which the corrugated core 32 forms a series of triangles when viewed from the side. Therefore, even if force is applied to the vertices of the core 32 which is formed into triangles when viewed from the side, the force is distributed to the left and right, so stability is maintained and the overall strength of the corrugated cardboard 3 is increased. Because the corrugated part of the core 32 has a space, the corrugated cardboard 3 is lighter due to the presence of this space, thus forming a structure that combines strength and lightness. The corrugated cardboard 3 is mainly made from recycled paper and wood pulp, and is made from recyclable and environmentally friendly materials. The direction of the mesh of the corrugated cardboard 3 is the longitudinal direction of the space of the triangular prism formed by the core 32.

[0025] Such cardboard cushioning materials have the function of protecting the items to be cushioned 5 from transportation shocks such as drops during transport, and are generally used for delivery and other purposes. However, when using a folded and assembled cardboard assembly to cushion and protect a heavy item 5, it is extremely difficult to provide sufficient strength to support it.

[0026] ≪Laminated corrugated cardboard 3D cushioning material≫ The laminated corrugated cardboard cushioning material 4 shown in Figures 1A to 1C is a cushioning material made of corrugated cardboard 3 for supporting relatively heavy products (heavy objects). The laminated corrugated cardboard cushioning material 4 consists of a cube or rectangular prism formed by laminating corrugated cardboard 3. Hereinafter, the laminated corrugated cardboard cushioning material 4 will be explained using a cube-shaped example as an example.

[0027] As shown in Figure 1C, the laminated corrugated cardboard three-dimensional cushioning material 4 is made by stacking many square-cut corrugated cardboard pieces 3 in the same grain direction and bonding them together with glue or adhesive, resulting in a cube with the same length L1, width L2, and height H1. The length L1, width L2, and height H1 are, for example, 150 mm.

[0028] As shown in Figure 1A, the block-shaped laminated corrugated cardboard three-dimensional cushioning material 4 has a vertical surface 4a on which the core 32 is exposed in a wavy pattern, a horizontal surface 4b on which the side surface of the core 32 is exposed, and a flat surface 4c on which the surface of the liner 31 is exposed.

[0029] Figure 2 is a graph showing the relationship between compressive stress and compressive strain on the vertical surface 4a, horizontal surface 4b, and plane 4c of the laminated corrugated cardboard three-dimensional cushioning material 4 obtained by experiment. As shown in Figures 1A to 1C, the laminated corrugated cardboard three-dimensional cushioning material 4, having a grain direction, exhibits different strengths and cushioning properties by changing the grain direction of the vertical surface 4a, horizontal surface 4b, and flat surface 4c, as shown in Figure 2. The vertical surface 4a and horizontal surface 4b are cross-sections of each corrugated cardboard 3. The vertical surface 4a is the surface of the corrugated cardboard 3 in the grain direction. The horizontal surface 4b is the surface of the corrugated cardboard 3 parallel to the grain direction. The flat surface 4c is the surface of the corrugated cardboard 3.

[0030] Figure 1A shows a laminated corrugated cardboard three-dimensional cushioning material 4 installed with its vertical surface 4a as the support surface for the item to be cushioned 5. The laminated corrugated cardboard three-dimensional cushioning material 4 is a vertical-grain corrugated cardboard three-dimensional cushioning material 41 in which the surface that supports the item to be cushioned 5 is the surface in the grain direction in the cross-section of each corrugated cardboard 3. The vertical-grain corrugated cardboard three-dimensional cushioning material 41 is positioned so that it receives a compressive load on the vertical surface 4a, which is the support surface for the item to be cushioned 5.

[0031] Figure 1B shows a laminated corrugated cardboard three-dimensional cushioning material 4 installed with its side surface 4b as the support surface for the item to be cushioned 5. The laminated corrugated cardboard three-dimensional cushioning material 4 is a cross-grain corrugated cardboard three-dimensional cushioning material 42 in which the surface that supports the item to be cushioned 5 is the surface of the cross section of each corrugated cardboard 3 that is parallel to the grain direction. The cross-grain corrugated cardboard three-dimensional cushioning material 42 is positioned so that it receives a compressive load on its side surface 4b, which is the support surface for the item to be cushioned 5.

[0032] Figure 1C shows a laminated corrugated cardboard three-dimensional cushioning material 4 installed with its plane 4c as the support surface for the item to be cushioned 5. The laminated corrugated cardboard three-dimensional cushioning material 4 is a flat corrugated cardboard three-dimensional cushioning material 43 in which the surface that supports the item to be cushioned 5 is the upper end surface of the laminated corrugated cardboard 3. The flat corrugated cardboard three-dimensional cushioning material 43 is positioned so that it receives a compressive load on the plane 4c, which is the support surface for the item to be cushioned 5.

[0033] As shown in Figure 1A, the vertical corrugated cardboard three-dimensional cushioning material 41, with its vertical surface 4a as the support surface for the item to be cushioned 5, is rigid, as shown in Figure 2, with a vertical compression F1 against the load from the support surface greater than the horizontal compression F2 and planar compression F3 described later. Therefore, the vertical corrugated cardboard three-dimensional cushioning material 41 can support even relatively heavy items to be cushioned 5.

[0034] As shown in Figure 1B, the three-dimensional corrugated cardboard cushioning material 42, with its side surface 4b as the support surface for the item to be cushioned 5, is softer, as shown in Figure 2, with a smaller lateral compression F2 against the load from the support surface than a vertical compression F1. Therefore, although the three-dimensional corrugated cardboard cushioning material 42 has lower support force for the item to be cushioned 5 than the three-dimensional corrugated cardboard cushioning material 41, it has better cushioning properties than the three-dimensional corrugated cardboard cushioning material 41 because it is softer.

[0035] As shown in Figure 1C, the flat corrugated cardboard three-dimensional cushioning material 43, with its flat surface 4c as the support surface for the item to be cushioned 5, has a flat compression F3 that is smaller than the vertical compression F1 and horizontal compression F2, and is softer than the cross-grain corrugated cardboard three-dimensional cushioning material 42 (see Figure 2). For this reason, the flat corrugated cardboard three-dimensional cushioning material 43 has less support force for the item to be cushioned 5 than the vertical-grain corrugated cardboard three-dimensional cushioning material 41 and the cross-grain corrugated cardboard three-dimensional cushioning material 42, and its softness gives it superior cushioning properties.

[0036] In this way, the laminated corrugated cardboard three-dimensional cushioning material 4 can be selected to firmly or softly support the heavy object to be cushioned 5 by utilizing the characteristics of the vertical surface 4a, horizontal surface 4b, and flat surface 4c, depending on the situation of the object to be cushioned.

[0037] Furthermore, the laminated corrugated cardboard three-dimensional cushioning material 4 requires a large number of sheets to create the three-dimensional shape, and the cutting shape must be changed depending on the area of ​​use, resulting in increased labor time and costs for processing and adhesive application. However, the laminated corrugated cardboard three-dimensional cushioning material 4 can be mass-produced because its width, depth, and height are made the same, creating a cube shape. As a cushioning material, it can be positioned in the optimal orientation on the bottom of heavy items, thus fulfilling its function.

[0038] Furthermore, the laminated corrugated cardboard three-dimensional cushioning material 4 can efficiently cushion and support the item to be cushioned 5 by utilizing the compression characteristics of the three sides (vertical side 4a, horizontal side 4b, and flat side 4c) of the vertical-grain corrugated cardboard three-dimensional cushioning material 41, the horizontal-grain corrugated cardboard three-dimensional cushioning material 42, and the flat corrugated cardboard three-dimensional cushioning material 43.

[0039] Figure 3A is a schematic front view showing the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention. Figure 3B is a schematic side view showing the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention. Figure 3C is a schematic bottom view showing the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention. Figure 3D is a schematic plan view showing the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention, showing the three-dimensional holding member 6.

[0040] ≪Buffered article≫ As shown in Figures 3A to 3C, the items to be cushioned 5 consist of heavy products weighing, for example, 40 kg to 500 kg, with the most optimal weight being 200 kg to 300 kg. Examples of items to be cushioned 5 include image forming equipment such as printers, photocopiers, and facsimile machines, large home appliances such as refrigerators, and relatively heavy products such as machine tools, large furniture, and pianos. To facilitate movement of the items to be cushioned 5, the items to be cushioned 5 are equipped with multiple (for example, three) casters 51, 52 on their bottoms. While the packaging cushioning material 2 and packaging structure 1 are ideal for use with heavy items to be cushioned 5, they can also be applied to relatively lighter products (items to be cushioned 5).

[0041] The number of casters 51 and 52 should be set appropriately considering the size and weight of the item to be cushioned 5, the rigidity of the casters 51 and 52, etc. It is desirable to place the casters 51 and 52 at the four corners of the bottom surface of the item to be cushioned 5. Furthermore, the structure and material of the casters 51 and 52 should be set appropriately considering the weight of the item to be cushioned 5, etc. In the following explanation, the cushioned item 5 will be described using an example where it is equipped with three casters 51 and 52.

[0042] The casters 51 and 52 comprise, for example, two casters 51 positioned at the front and rear on the left side of the bottom surface 5a of the cushioned item 5, and one caster 52 positioned in the center on the right side of the bottom surface 5a of the cushioned item 5.

[0043] ≪Packaging structure≫ As shown in Figures 3A to 3C, the packaging structure 1 is a device for supporting the item to be cushioned 5 when transporting the item to be cushioned 5. As shown in Figures 3A to 3D, the packaging structure 1 comprises a packaging cushioning material 2 that supports the item to be cushioned 5, and a three-dimensional holding member 6 that supports the packaging cushioning material 2.

[0044] ≪Packaging cushioning material≫ As shown in Figures 3A to 3C, the packaging cushioning material 2 is a support for the item to be cushioned 5. The packaging cushioning material 2 is made up of multiple laminated corrugated cardboard three-dimensional cushioning materials 4 arranged in a stacked state and three-dimensional shape to match the bottom shape of the item to be cushioned 5 which has casters 51 and 52. The cushioning strength of the packaging cushioning material 2 can be adjusted by the compression characteristics of each surface of the multiple laminated corrugated cardboard three-dimensional cushioning materials 4: the vertical surface 4a, the horizontal surface 4b, and the flat surface 4c. In other words, the cushioning strength of the packaging cushioning material 2 can be adjusted by arranging vertical-grain corrugated cardboard three-dimensional cushioning materials 41, horizontal-grain corrugated cardboard three-dimensional cushioning materials 42, or flat corrugated cardboard three-dimensional cushioning materials 43. In the following first embodiment, we will describe the case in which only vertically-grained corrugated cardboard three-dimensional cushioning material 41 is used as the packaging cushioning material 2, as shown in Figures 3A to 3C.

[0045] ≪Laminated corrugated cardboard 3D cushioning material≫ As shown in Figures 3A to 3C, the laminated corrugated cardboard three-dimensional cushioning material 4 is standardized into a cubic shape and arranged in a manner that combines the compression characteristics of each surface: the vertical surface 4a, the horizontal surface 4b, and the planar surface 4c. The laminated corrugated cardboard three-dimensional cushioning material 4 is positioned by fitting it into the laminated corrugated cardboard support portion 6a of the three-dimensional holding member 6, which is previously placed on the bottom surface 5a or side surface 5b of the item to be cushioned 5.

[0046] As shown in Figure 3C, the laminated corrugated cardboard three-dimensional cushioning material 4 consists of multiple vertically oriented corrugated cardboard three-dimensional cushioning materials 41 arranged in a row, with their vertical surfaces 4a positioned vertically. The laminated corrugated cardboard three-dimensional cushioning material 4 consists, for example, a first bottom three-dimensional cushioning material group 44 arranged around the left casters 51, 51, and a second bottom three-dimensional cushioning material group 45 arranged around the right caster 52.

[0047] The first bottom three-dimensional cushioning material group 44 is constructed by continuously arranging multiple laminated corrugated cardboard three-dimensional cushioning materials 4 in a roughly T-shape when viewed from the bottom, between the left casters 51, 51 and to the left of the left casters 51, 51. The second bottom three-dimensional cushioning material group 45 is constructed by continuously arranging multiple layers of corrugated cardboard three-dimensional cushioning material 4 in a roughly U-shape when viewed from the bottom, around the caster 52 on the right side.

[0048] ≪Three-dimensional support member≫ Figure 3D is a diagram showing the packaging cushioning material 2 and packaging structure 1 according to the first embodiment of the present invention, and is a schematic plan view showing the three-dimensional holding member 6. As shown in Figures 3A to 3D, the three-dimensional holding member 6 is a member that is placed on the bottom surface 5a or side surface 5b of the item to be cushioned 5 to position the item to be cushioned 5. The three-dimensional holding member 6 consists of a member called a bottom tray, which is placed on a pallet (not shown). As shown in Figure 3C or Figure 3D, the three-dimensional support member 6 has a laminated corrugated cardboard support portion 6a that supports the first bottom three-dimensional cushioning material group 44 and a laminated corrugated cardboard support portion 6b that supports the second bottom three-dimensional cushioning material group 45.

[0049] The laminated cardboard support section 6a consists of notched grooves for fitting the first bottom three-dimensional cushioning material group 44 so that it does not shift. For this reason, the laminated cardboard support section 6a is formed in a recessed state of, for example, about 8 mm so that the first bottom three-dimensional cushioning material group 44 fits into it. The laminated cardboard support section 6b consists of notched grooves for fitting the second bottom three-dimensional cushioning material group 45 so that it does not shift. For this reason, the laminated cardboard support section 6b is formed in a recessed state of, for example, about 8 mm so that the second bottom three-dimensional cushioning material group 45 fits into it.

[0050] ≪Effect≫ The packaging cushioning material 2 and packaging structure 1 according to the first embodiment are basically configured as described above, and their effects will now be explained with reference to Figures 3A to 3D.

[0051] First, as shown in Figure 3C, the worker determines the shape of the first bottom three-dimensional cushioning material group 44 and the second bottom three-dimensional cushioning material group 45 in accordance with the shape of the item to be cushioned 5 and the shape and arrangement of the casters 51 and 52.

[0052] Next, the worker connects multiple laminated corrugated cardboard three-dimensional cushioning materials 4 to form a first bottom three-dimensional cushioning material group 44 and a second bottom three-dimensional cushioning material group 45. Since the packaging cushioning material 2 formed in this way is composed of small laminated corrugated cardboard three-dimensional cushioning materials 4, it is possible to easily form the first bottom three-dimensional cushioning material group 44 and the second bottom three-dimensional cushioning material group 45 in various shapes.

[0053] Next, the worker forms the laminated corrugated cardboard support sections 6a and 6b on the three-dimensional holding member 6, where the first bottom three-dimensional cushioning material group 44 and the second bottom three-dimensional cushioning material group 45 engage. The completed three-dimensional holding member 6 is then placed on a pallet (not shown).

[0054] Next, the first bottom three-dimensional cushioning material group 44 is fitted into the laminated corrugated cardboard support portion 6a of the three-dimensional holding member 6 placed on the pallet (not shown). The second bottom three-dimensional cushioning material group 45 is fitted into the laminated corrugated cardboard support portion 6b.

[0055] In this way, the packaging structure 1, by providing the first bottom three-dimensional cushioning material group 44 and the second bottom three-dimensional cushioning material group 45 on the three-dimensional holding member 6, can absorb vibrations even when there are vibrations during transportation, and suppress displacement of the cushioned item 5.

[0056] As shown in Figures 3A to 3D, the packaging cushioning material 2 of the present invention is a member that supports the item to be cushioned 5. The packaging cushioning material 2 consists of multiple laminated corrugated cardboard three-dimensional cushioning materials 4, which are made by stacking corrugated cardboard 3 in a three-dimensional shape, arranged to support the item to be cushioned 5 with surfaces that have compression characteristics corresponding to the cushioning strength of the item to be cushioned.

[0057] With this configuration, the packaging cushioning material 2 is made by arranging multiple laminated corrugated cardboard three-dimensional cushioning materials 4, which are made by stacking corrugated cardboard 3 in a three-dimensional shape. This allows for a change from using multiple types of parts to using the same part, thus reducing parts management costs. Furthermore, because the laminated corrugated cardboard three-dimensional cushioning material 4 can be made into a standard, small size, the packaging cushioning material 2 is easy to assemble, lightweight, and easy to handle. Furthermore, the packaging cushioning material 2 has varying cushioning strengths depending on the compression characteristics of each surface of the multiple laminated corrugated cardboard three-dimensional cushioning materials 4, making it possible to select the cushioning strength of the receiving surface for each part of the receiving surface depending on the receiving surface of the item to be cushioned 5 and the balance of the center of gravity.

[0058] Furthermore, as shown in Figures 1A to 3D, the laminated corrugated cardboard three-dimensional cushioning material 4 is standardized into a predetermined three-dimensional shape.

[0059] With this configuration, the laminated corrugated cardboard three-dimensional cushioning material 4 can be formed using a large number of parts of a single shape by standardizing it into a predetermined three-dimensional shape, thereby reducing manufacturing costs. Since the laminated corrugated cardboard three-dimensional cushioning material 4 can be arranged by combining the compression characteristics of each surface, it can be formed to match the shape of the item to be cushioned 5, and the cushioning strength can be set according to the weight and strength of each part.

[0060] Furthermore, as shown in Figures 3A to 3D, the laminated corrugated cardboard three-dimensional cushioning material 4 is arranged in a way that combines the compression characteristics of each surface.

[0061] With this configuration, the laminated corrugated cardboard three-dimensional cushioning material 4 can be arranged in combination with the compression characteristics of each surface, thereby changing the support surface that supports the item to be cushioned 5 according to the weight of the item to be cushioned 5, and thus achieving compression characteristics that match the item to be cushioned 5.

[0062] Furthermore, as shown in Figures 3A to 3D, the laminated corrugated cardboard three-dimensional cushioning material 4 is positioned by three-dimensional holding members 6 that are pre-placed on the bottom surface 5a and side surfaces 5b of the item to be cushioned 5.

[0063] With this configuration, the laminated corrugated cardboard three-dimensional cushioning material 4 is positioned by three-dimensional holding members 6 placed on the bottom surface 5a and side surfaces 5b of the item to be cushioned 5, thereby suppressing displacement due to vibrations during transport.

[0064] Furthermore, as shown in Figures 1A to 6C, the laminated corrugated cardboard three-dimensional cushioning material 4 is either a cube or a rectangular prism.

[0065] With this configuration, the laminated corrugated cardboard three-dimensional cushioning material 4 is cubic or rectangular in shape to utilize its surface properties, allowing for elastic support by setting the cushioning strength according to the shape of the item to be cushioned 5 and the strength of each part. Furthermore, since the laminated corrugated cardboard three-dimensional cushioning material 4, which is made up of cubes, has the same dimensions in length, width, and height, it maintains the same shape regardless of the direction in which it is positioned, thus requiring no effort during installation.

[0066] Furthermore, as shown in Figures 1A to 1C, the packaging cushioning material 2 is configured such that the surface on which the laminated corrugated cardboard three-dimensional cushioning material 4 supports the item to be cushioned 5 is the surface in the grain direction of the cross-section of each corrugated cardboard 3, the surface of each corrugated cardboard 3, and / or the surface in the cross-section of each corrugated cardboard 3 that is parallel to the grain direction.

[0067] In this configuration, the surfaces on which the laminated corrugated cardboard cushioning material 4 supports the item to be cushioned 5 are the surface in the grain direction of each corrugated cardboard 3, the surface of each corrugated cardboard 3, and / or the surface in the cross-section of each corrugated cardboard 3 that is parallel to the grain direction. Therefore, the packaging cushioning material 2 can easily set the cushioning strength according to the shape of the item to be cushioned 5 and the strength of each part, and it is easy to provide elastic support.

[0068] Furthermore, as shown in Figures 3A to 3D, the packaging structure 1 includes a packaging cushioning material 2 that supports the item to be cushioned 5. The packaging structure 1 includes a packaging cushioning material 2 which is made by arranging laminated corrugated cardboard three-dimensional cushioning material 4 which is made by stacking corrugated cardboard 3 in a stacked state and forming a three-dimensional shape, and which has varying cushioning strengths depending on the compression characteristics of each surface, and a three-dimensional holding member 6 which is placed on the bottom surface 5a and side surface 5b of the item to be cushioned 5 to position the item to be cushioned 5.

[0069] With this configuration, the packaging structure 1 is made up of stacked corrugated cardboard three-dimensional cushioning material 4, which is formed by stacking corrugated cardboard 3 in a three-dimensional shape, and includes packaging cushioning material 2 that has varying cushioning strengths depending on the compression characteristics of each surface, so that the overall shape can be freely set. Furthermore, the packaging structure 1 includes three-dimensional holding members 6 positioned on the bottom surface 5a and side surfaces 5b of the item to be cushioned 5 to position the item to be cushioned 5, thereby suppressing displacement of the item to be cushioned 5 due to vibration during transport.

[0070] [Second Embodiment] It should be noted that the present invention is not limited to the first embodiment described above, and various modifications and changes are possible within the scope of its technical concept, and the present invention naturally extends to such modified and altered inventions as well.

[0071] Figure 4A is a schematic perspective view showing Comparative Example 1, in which a group of laminated corrugated cardboard cushioning materials 400A are arranged vertically on a three-dimensional holding member 600A. Figure 4B is a schematic perspective view showing a group of packaging cushioning materials 2A and a packaging structure 1A according to the second embodiment of the present invention. Next, the packaging cushioning material group 2A and packaging structure 1A according to the second embodiment of the present invention shown in Figure 4B will be described in comparison with Comparative Example 1 shown in Figure 4A.

[0072] As shown in Figure 4A, in Comparative Example 1, the laminated corrugated cardboard three-dimensional cushioning material group 400A has the first bottom three-dimensional cushioning material group 440A and the second bottom three-dimensional cushioning material group 450A arranged vertically across the entire area of ​​the three-dimensional holding member 600A. Therefore, all the laminated corrugated cardboard three-dimensional cushioning material groups 400A in Comparative Example 1 have the same strength and cushioning properties, so the strength and cushioning properties of each part supporting the cushioned item 5 (not shown) are constant throughout the entire area.

[0073] In contrast, the packaging cushioning material group 2A of the second embodiment shown in Figure 4B consists of laminated corrugated cardboard three-dimensional cushioning material 4A arranged on the front and rear sides of the first bottom three-dimensional cushioning material group 44A and the second bottom three-dimensional cushioning material group 45A, which are made of vertically grained corrugated cardboard three-dimensional cushioning material 41. The laminated corrugated cardboard three-dimensional cushioning material 4A arranged on the central side of the first bottom three-dimensional cushioning material group 44A and the second bottom three-dimensional cushioning material group 45A consists of flat corrugated cardboard three-dimensional cushioning material 43, in which the direction of the grain of the corrugated cardboard 3 is horizontal and is visible on the side.

[0074] Therefore, the packaging cushioning material group 2A of the second embodiment can firmly support the front and rear ends of the item to be cushioned 5 (not shown) with vertically positioned corrugated cardboard three-dimensional cushioning material 41. In addition, the packaging cushioning material group 2A of the second embodiment can elastically support the central part of the item to be cushioned 5 (not shown) with good cushioning properties using flat corrugated cardboard three-dimensional cushioning material 43.

[0075] Therefore, the packaging cushioning material group 2A and packaging structure 1A of the second embodiment can support the cushioned article 5 (not shown) in a balanced manner according to its shape and other characteristics.

[0076] [Third Embodiment] Figure 5A is a schematic perspective view showing Comparative Example 2, in which a group of laminated corrugated cardboard three-dimensional cushioning materials 400B are arranged vertically on a three-dimensional holding member 600B. Figure 5B is a schematic perspective view showing a group of packaging cushioning materials 2B and a packaging structure 1B according to the third embodiment of the present invention. Next, the packaging cushioning material group 2B and packaging structure 1B according to the third embodiment of the present invention shown in Figure 5B will be described in comparison with Comparative Example 2 shown in Figure 5A.

[0077] Comparative Example 2, shown in Figure 5A, has the laminated corrugated cardboard three-dimensional cushioning material group 400B, consisting of the first bottom three-dimensional cushioning material group 440B and the second bottom three-dimensional cushioning material group 450B, arranged vertically at equal intervals and in the same orientation throughout the entire area. Therefore, all of the laminated corrugated cardboard three-dimensional cushioning material groups 400B in Comparative Example 2 have the same strength and cushioning properties, so the strength and cushioning properties of each part supporting the cushioned item 5 (not shown) are constant throughout the entire area.

[0078] In contrast, the packaging cushioning material group 2B of the third embodiment shown in Figure 5B comprises a first bottom three-dimensional cushioning material group 44B located to the left of the three-dimensional holding member 6, and a second bottom three-dimensional cushioning material group 45B located to the right of the three-dimensional holding member 6. The two laminated corrugated cardboard three-dimensional cushioning materials 4B located on the front and rear sides of the first bottom three-dimensional cushioning material group 44B consist of vertically grained corrugated cardboard three-dimensional cushioning materials 41. The laminated corrugated cardboard three-dimensional cushioning material 4B located on the central side of the first bottom three-dimensional cushioning material group 44B consists of two flat-layed planar corrugated cardboard three-dimensional cushioning materials 43 with adjusted numbers, and the grain direction of the corrugated cardboard 3 is horizontal and is visible on the side.

[0079] The second bottom three-dimensional cushioning material group 45B consists of two laminated corrugated cardboard three-dimensional cushioning materials 4B arranged on the front and rear sides of the three-dimensional holding member 6, and these are made up of vertically-grained corrugated cardboard three-dimensional cushioning material 41. In the second bottom three-dimensional cushioning material group 45B, there is no laminated corrugated cardboard three-dimensional cushioning material 4B arranged on the central side of the three-dimensional holding member 6, leaving a space.

[0080] Therefore, the packaging cushioning material group 2B of the third embodiment can be firmly supported by the vertically oriented corrugated cardboard three-dimensional cushioning material 41, which is positioned vertically at the front and rear ends of the item to be cushioned 5 (not shown). Furthermore, the packaging cushioning material group 2B of the third embodiment can be elastically supported by the two flat corrugated cardboard three-dimensional cushioning materials 43, which are placed flat at the center of the item to be cushioned 5 (not shown), and by the space where the laminated corrugated cardboard three-dimensional cushioning material 4B is not installed.

[0081] Therefore, the packaging cushioning material group 2B can be supported in a balanced manner by the laminated corrugated cardboard three-dimensional cushioning material 4B, which consists of a first bottom three-dimensional cushioning material group 44B and a second bottom three-dimensional cushioning material group 45B, whose quantities are adjusted according to the shape of the cushioned item 5 (not shown). The packaging cushioning material group 2B can be arranged to effectively utilize the compression characteristics of each surface of the laminated corrugated cardboard three-dimensional cushioning material 4B, depending on the bottom plate configuration, strength, center of gravity of the item to be cushioned 5, the position of the casters 51 and 52 (see Figure 3C), and the amount of support area secured. Furthermore, the laminated corrugated cardboard three-dimensional cushioning material 4B can be easily removed when unnecessary, similar to the second bottom three-dimensional cushioning material group 45B, thereby achieving elastic support functionality.

[0082] [Fourth Embodiment] Figure 6A is a schematic front view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 are placed on the bottom surface 5a of the item to be cushioned 5. Figure 6B is a schematic side view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 are placed on the bottom surface 5a of the item to be cushioned 5. Figure 6C is a schematic bottom view showing the installation state of Comparative Example 3, in which two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 are placed on the bottom surface 5a of the item to be cushioned 5. Figure 6D is a schematic top view showing the installation state of Comparative Example 3 in the three-dimensional holding member 6 for arranging the two types of large-sized laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2.

[0083] Figure 7A is a schematic front view showing the packaging cushioning material group 2C and packaging structure 1C according to the fourth embodiment of the present invention, in which a single type of small-sized laminated corrugated cardboard three-dimensional cushioning material 4C is placed on the bottom surface 5a of the item to be cushioned 5. Figure 7B is a schematic side view showing the packaging cushioning material group 2C and packaging structure 1C according to the fourth embodiment of the present invention, in which a single type of small-sized laminated corrugated cardboard three-dimensional cushioning material 4C is placed on the bottom surface 5a of the item to be cushioned 5. Figure 7C is a schematic bottom view showing the packaging cushioning material group 2C and packaging structure 1C according to the fourth embodiment of the present invention, in which a single type of small-sized laminated corrugated cardboard three-dimensional cushioning material 4C is placed on the bottom surface 5a of the item to be cushioned 5. Figure 7D is a schematic plan view showing the packaging cushioning material group 2C and packaging structure 1C according to the fourth embodiment of the present invention, in which a three-dimensional holding member 6 for arranging a single type of small-sized laminated corrugated cardboard three-dimensional cushioning material 4C is placed.

[0084] Next, the packaging cushioning material group 2C and packaging structure 1C according to the fourth embodiment of the present invention, shown in Figures 7A to 7D, will be described in comparison with Comparative Example 3, shown in Figures 6A to 6D.

[0085] The laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 of Comparative Example 3, shown in Figures 6A to 6D, consist of two types of relatively large sizes. The laminated corrugated cardboard three-dimensional cushioning material 400C1, positioned on the left side, is formed in a roughly T-shape when viewed from below, in accordance with the installation position of the casters 51, 51 on the left side, and consists of a single component positioned around the casters 51, 51.

[0086] The laminated corrugated cardboard three-dimensional cushioning material 400C2, positioned on the right side, is formed in a roughly U-shape when viewed from below, in accordance with the installation position of the caster 52 on the right side, and consists of a single component arranged to surround the caster 52.

[0087] The laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 of Comparative Example 3, formed in this manner, are relatively large in size because they consist of a single component. Furthermore, the laminated corrugated cardboard three-dimensional cushioning materials 400C1 and 400C2 are formed to match the shape of the bottom surface of the item to be cushioned 5, the arrangement of the casters 51 and 52, etc., so various types are required depending on the type of item to be cushioned 5.

[0088] In contrast, the packaging cushioning material group 2C of the fourth embodiment shown in Figure 7B comprises a first bottom three-dimensional cushioning material group 44C located to the left of the three-dimensional holding member 6, and a second bottom three-dimensional cushioning material group 45C located to the right of the three-dimensional holding member 6. The laminated corrugated cardboard three-dimensional cushioning material 4C of the first bottom three-dimensional cushioning material group 44C and the second bottom three-dimensional cushioning material group 45C is made up of a plurality of relatively small cubic-shaped vertical-grain corrugated cardboard three-dimensional cushioning materials 41 connected in series. The laminated corrugated cardboard three-dimensional cushioning material 4C may be the cross-grain corrugated cardboard three-dimensional cushioning material 42 or the flat corrugated cardboard three-dimensional cushioning material 43 shown in Figures 1B and 1C.

[0089] As shown in Figures 7A to 7C, the first bottom three-dimensional cushioning material group 44C is formed by connecting five relatively small three-dimensional cushioning materials 4C of one type, and is roughly T-shaped when viewed from the bottom. The second bottom three-dimensional cushioning material group 45C is formed by connecting six relatively small, one type of laminated corrugated cardboard three-dimensional cushioning material 4C in a roughly U-shape when viewed from the bottom.

[0090] The packaging cushioning material group 2C of the fourth embodiment formed in this manner is easy to handle because it uses many small, standardized, and identically shaped laminated corrugated cardboard three-dimensional cushioning materials 4C. For this reason, the laminated corrugated cardboard three-dimensional cushioning material 4C can be freely formed into a first bottom three-dimensional cushioning material group 44C and a second bottom three-dimensional cushioning material group 45C of appropriate shapes by assembling blocks to match the shape of the bottom of the item to be cushioned 5.

[0091] [Fifth Embodiment] Figure 8A is a schematic perspective view of the main parts of a laminated corrugated cardboard three-dimensional cushioning material 400D of Comparative Example 4, in which the casters 51 of the item to be cushioned 5 are interfering. Figure 8B is a diagram showing a packaging cushioning material 2D and packaging structure 1D according to the fifth embodiment of the present invention, and is a schematic perspective view of the main parts of a laminated corrugated cardboard three-dimensional cushioning material 4D that avoids interference with the casters 51 of the item to be cushioned 5. Next, the packaging cushioning material 2D and packaging structure 1D according to the fifth embodiment of the present invention shown in Figure 8B will be described in comparison with Comparative Example 4 shown in Figure 8A.

[0092] As shown in Figure 8A, the laminated corrugated cardboard cushioning material 400D of Comparative Example 4 is formed in a cubic shape. When the cubic laminated corrugated cardboard cushioning material 400D is installed around the casters 51 and 52, it may interfere with the casters 51 and 52.

[0093] In contrast, the three-dimensional shape of the laminated corrugated cardboard cushioning material 4D of the fifth embodiment consists of a polyhedron (polygonal prism) having cut surfaces 4Da, which are formed by cutting the corners of the sides to avoid the casters 51, 52. By having cut surfaces 4Da, the laminated corrugated cardboard cushioning material 4D is formed, for example, as a pentagon when viewed from above.

[0094] In this case, the laminated corrugated cardboard three-dimensional cushioning material 4D only needs to have a cut surface 4Da, and may be, for example, a polygon having triangular, quadrilateral, or pentagonal or more line segments when viewed from above.

[0095] In this configuration, since the laminated corrugated cardboard cushioning material 4D has a cut surface 4Da, the casters 51 and 52 placed on the bottom surface 5a of the item to be cushioned 5 can be effectively positioned without interfering with the laminated corrugated cardboard cushioning material 4D. Furthermore, the laminated corrugated cardboard cushioning material 4D may be a polyhedron (polygonal prism) with a shape in which some functionally unnecessary parts have been cut off. Therefore, the packaging structure 1D and the packaging cushioning material 2D can be made space-saving by incorporating the laminated corrugated cardboard cushioning material 4D having a cut surface 4Da.

[0096] [Differentiation] In the first embodiment, as an example of the cushioned article 5, as shown in Figures 3A to 3C, an example was described in which the cushioned article 5 is equipped with casters 51 on its bottom surface 5a. However, the cushioned article 5 may not be equipped with casters 51. In that case, instead of casters 51, fixed legs may be provided on the bottom surface 5a of the item to be cushioned 5. Also, although Figures 3A to 3C illustrate the case where three casters 51 are installed on the bottom surface 5a of the item to be cushioned 5, the number of casters 51 may be changed as appropriate. The number of fixed legs may be three or more (for example, four) considering the weight of the item to be cushioned 5 and its stability.

[0097] Furthermore, the laminated corrugated cardboard three-dimensional cushioning material 4, which consists of standardized cubes, can be made compatible with the shape of the product by varying the size of the cubes.

[0098] Furthermore, each corrugated cardboard 3 that constitutes the laminated corrugated cardboard three-dimensional cushioning material 4 is not limited to double-sided corrugated cardboard in which the liner 31 is bonded to both sides of the core 32, but may also be single-sided corrugated cardboard, double-sided corrugated cardboard, triple-double-sided corrugated cardboard, etc., and is not limited to these. [Explanation of symbols]

[0099] 1,1A,1B,1C,1D packaging structure 2,2D packaging cushioning material 2A, 2B, 2C Packaging cushioning material group 3 cardboard boxes 4,4A,4B,4C,4D Laminated cardboard 3D cushioning material 4Da cut surface 5 Cushioned articles 5a Bottom 5b side 6. Three-dimensional holding member 31 Raina 32 Core 41 Vertical-grain corrugated cardboard 3D cushioning material 42. Cross-grain corrugated cardboard 3D cushioning material 43. Flat corrugated cardboard cushioning material

Claims

1. A packaging cushioning material that supports an item to be cushioned, Multiple laminated corrugated cardboard cushioning materials, which are made by stacking corrugated cardboard in a three-dimensional shape, are arranged to support the item to be cushioned on surfaces having compression characteristics corresponding to the cushioning strength of the item. Packaging cushioning material.

2. The aforementioned laminated corrugated cardboard three-dimensional cushioning material is standardized into a predetermined three-dimensional shape. The packaging cushioning material according to claim 1.

3. The aforementioned laminated corrugated cardboard three-dimensional cushioning material is arranged in a way that combines the compression characteristics of each surface. The packaging cushioning material according to claim 1.

4. The laminated corrugated cardboard three-dimensional cushioning material is positioned by three-dimensional holding members that are pre-placed on the bottom or sides of the item to be cushioned. A packaging cushioning material according to any one of claims 1 to 3.

5. The aforementioned laminated corrugated cardboard three-dimensional cushioning material is a cube or a rectangular prism. A packaging cushioning material according to any one of claims 1 to 3.

6. The three-dimensional shape of the aforementioned laminated corrugated cardboard cushioning material consists of a polyhedron having cut surfaces obtained by cutting the corners of the sides. A packaging cushioning material according to any one of claims 1 to 3.

7. The aforementioned packaging cushioning material is The surface on which the laminated corrugated cardboard three-dimensional cushioning material supports the item to be cushioned is, Of the cross-sections of each of the aforementioned corrugated cardboard pieces, the surface in the direction of the grain, The surface of each of the aforementioned corrugated cardboard pieces, and / or the cross-section of each of the aforementioned corrugated cardboard pieces, which is the surface parallel to the grain direction. A packaging cushioning material according to any one of claims 1 to 3.

8. A packaging structure comprising a packaging cushioning material that supports the item to be cushioned, The packaging cushioning material consists of laminated corrugated cardboard cushioning material, which is made by stacking corrugated cardboard in a three-dimensional shape, and the cushioning strength is varied depending on the compression characteristics of each surface. A three-dimensional holding member is positioned on the bottom or side of the item to be cushioned to position the item to be cushioned, Equipped with, packaging structure.

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