Shock-absorbing materials, packaging materials, and packaging systems

Abstract

To provide a shock cushioning material which can improve a shock cushioning property further than a conventional one, in the shock cushioning material which includes a shock cushioning rib structure.SOLUTION: In a shock cushioning material which is constituted by a base structure part which has a storage space for a body to be packaged, and a shock cushioning rib structure provided at least on one surface of the base structure, the shock cushioning rib structure is constituted by: a main cushioning part supported by the base structure part and having a cubic or rectangular parallelepiped shape; and an auxiliary cushioning part supported by the base structure part on both end parts, and having a shape in which a space between both end parts is separated from the base structure part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a shock cushion, a package, and a packaging system. [Background technology]

[0002] Packaging materials for precision machinery products are equipped with shock-absorbing cushioning materials to prevent fragile packaged items from being deformed or damaged by vibrations or dropping impacts during distribution. This cushioning material can absorb the impact, i.e., the shock acceleration, acting on the packaged items through its own deformation and buckling action. For example, even if the packaged items are subjected to shock accelerations of up to several hundred G, there is a known technology that can reduce the shock acceleration to less than 100 G by using cushioning materials.

[0003] Conventional cushioning materials are provided with a shock absorbing rib structure formed with a structural strength that matches the mass of the packaged item and the expected drop height (see Figure 1), and exert shock absorbing functions by the compressive stress characteristics resulting from the compressive deformation of the shock absorbing rib structure. In addition, the maximum efficiency point of shock absorbing by this compressive stress characteristic is under the condition that the compressive strain is 0.5 to 0.65, and it is already known that this is the limit point of the shock absorbing function of this structure.

[0004] Furthermore, for example, Patent Document 1 discloses a packaging box that supports the top or bottom of a product with a cushioning member formed by folding the tip portion of the inner flap of the cover panel or bottom panel. Summary of the Invention [Problem to be solved by the invention]

[0005] These conventional cushioning materials and the packaging box disclosed in Patent Document 1 have a simple structure and good impact cushioning properties, but the compressive stress characteristics of the impact cushioning rib structure are limited, making it difficult to obtain a high level of impact cushioning properties.

[0006] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide an impact cushioning material having an impact cushioning rib structure, which can improve impact cushioning properties as compared to conventional impact cushioning materials. [Means for solving the problem]

[0007] The above problem is solved by a shock absorbing material including a base structure having a storage space for an object to be packaged, and a shock absorbing rib structure provided on at least one surface of the base structure, the shock absorbing rib structure being attached to the base structure. Fixed Supported and has a cubic or rectangular shape and is compressed and deformed by external impact. A main buffer portion and a base structure portion supported by both ends of the main buffer portion and a base structure portion between the both ends. and an arch-shaped portion spaced apart from the contact portion between the base structure portion and the packaged object. Shape and is compressed and bent by external impact. Auxiliary buffer section and Putting them in parallel composition The combination of the main buffer section and the auxiliary buffer section creates a composite stress effect. The above-mentioned problems are solved by an impact cushioning material which is characterized by the above. Effect of the Invention

[0008] The shock absorbing material of the present invention has a shock absorbing rib structure that is composed of a main shock absorbing section that undergoes compressive deformation and an auxiliary shock absorbing section that undergoes compressive and bending deformation. The main shock absorbing section applies compressive stress, and the auxiliary shock absorbing section applies compressive and bending stress. Therefore, the shock absorbing rib structure generates a composite stress action, and can improve shock absorbing performance compared to conventional shock absorbing materials. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a shock absorbing material according to a conventional specification. [Diagram 2] 1 is a perspective view of a shock absorber according to an embodiment of the present invention; [Diagram 3] FIG. 3 is a perspective view showing stress acting on the shock absorber of FIG. 2. [Figure 4] 13A is a graph showing the characteristics of each buffer section, and FIG. 13B is a graph comparing the characteristics of the present embodiment with those of the conventional specification. [Diagram 5] FIG. 2 is a perspective view of a shock absorbing material having a plurality of shock absorbing rib structures. [Figure 6]3 is a perspective view of a shock absorber in which the arrangement of the main shock absorbers and the auxiliary shock absorbers is changed from that of the shock absorber of FIG. 2. [Figure 7] This is a schematic diagram (part 1) of an impact-absorbing material made by stacking multiple flat plates. [Figure 8] This is a schematic diagram (part 2) of an impact-absorbing material made by stacking and bonding multiple flat plates. [Figure 9] 1 is a perspective view of an impact cushioning material that does not have a space for accommodating a packaged object. FIG. [Figure 10] FIG. 11 is a perspective view showing variations in the shape of the auxiliary buffer portion; [Figure 11] FIG. 13 is a perspective view of the shock absorber with the main shock absorber section deformed. [Figure 12] 11 is a perspective view of an impact cushioning material having an opening for accommodating a deformed portion of an auxiliary cushioning portion; FIG. [Figure 13] FIG. 13 is a side view of the shock absorber shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 2 is a perspective view of an impact cushioning material according to one embodiment of the present invention. The impact cushioning material 1 is composed of a base structure 10 having a storage space 5 for a packaged object (e.g., a copier) and an impact cushioning rib structure 20 provided on the upper surface of the base structure 10.

[0011] This shock-absorbing rib structure 20 is composed of a main cushioning section 12 supported by a base structure section 10 and having a cubic or rectangular parallelepiped shape, and an auxiliary cushioning section 14 supported by the base structure section 10 at both ends and having a shape spaced apart from the base structure section 10 between the both ends.

[0012] Specifically, one main buffer section 12 is provided at the center of the upper surface of the base structure section 10, and two auxiliary buffer sections 14 are provided to sandwich it. The auxiliary buffer section 14 has an inverted V-shape (or arch shape) and is intended to cause bending deformation.

[0013] A packaged object such as a copier is fitted with the impact cushioning material 1 and packed in a packaging material. When the packaging material is subjected to vibration and / or a drop impact, as shown in Fig. 3, a compressive stress due to compressive deformation of the main cushioning section 12 acts on the package, and at the same time, a compressive and bending stress due to bending deformation of the auxiliary cushioning section 14 acts on the package.

[0014] In the conventional specifications (see Fig. 1), shock is absorbed only by the compressive deformation and compressive stress of a single shock-absorbing rib structure, but in this embodiment (see Fig. 2), a compound stress action is generated by the main shock-absorbing section 12 and the newly provided auxiliary shock-absorbing section 14. This absorbs shock with a shock-absorbing efficiency equal to or higher than the conventional specifications, and can reduce the maximum impact force applied even when the same packaged object is used.

[0015] Fig. 4(a) is a graph showing the characteristics of each buffer section, and Fig. 4(b) is a graph comparing the characteristics of the conventional specification and this embodiment. In both (a) and (b), the horizontal axis is the deformation amount (mm) and the vertical axis is the applied reaction force (N).

[0016] As shown by the bottom line in (a), the auxiliary buffer section is initially subjected to compressive stress, and then bending stress due to bending deformation acts on it. It can be seen that the reaction force drops significantly when bending deformation occurs, and then gradually increases.

[0017] On the other hand, as shown by the middle line in (a), the main buffer section is subjected to compressive stress, so the reaction force increases monotonically. Therefore, as shown in the top graph in (a), the combined force (reaction force) of the main buffer section and the auxiliary buffer section rises faster and is larger than the force of the main buffer section alone.

[0018] In addition to the above, in this embodiment, by reducing the area of ​​the main buffer that receives the impact and making it a small volume, the reaction force in the main buffer can be reduced. That is, as shown in the graph in (b), the impact buffer of this embodiment can increase the reaction force rise and value at the start of deformation, and can reduce the reaction force acting on the packaged object after a certain deformation compared to buffers of conventional specifications.

[0019] 2 has one main cushioning section 12 and two auxiliary cushioning sections 14 on one surface of the base structural section 10, but is not limited to this. At least one main cushioning section 12 and one auxiliary cushioning section 14 may be provided on at least one surface of the base structural section 10. An appropriate shock absorbing rib structure can be selected for the shock expected from the mass of the packaged item and the expected drop height.

[0020] Subsequently, advantageous configurations of the invention will be explained.

[0021] Fig. 5 is a perspective view of a shock-absorbing material having multiple shock-absorbing rib structures. The main shock-absorbing parts 12 and the auxiliary shock-absorbing parts 14 can be provided on multiple surfaces (up to five surfaces including the rear surface hidden in Fig. 5) of the base structure 10. The shock-absorbing material 1a has shock-absorbing rib structures 20 on multiple surfaces, and therefore can exhibit shock-absorbing function on multiple sides.

[0022] The shock absorbing material 1a is not limited to a hexahedron such as a rectangular parallelepiped or a cube, but may have a three-dimensional shape having more faces, and each face may have a shock absorbing rib structure 20.

[0023] We will now explain how to arrange (dispose) the main buffer section 12 and the auxiliary buffer section 14. When the center of gravity of the packaged object is located toward the center, it is suitable to provide the main buffer section 12 between two auxiliary buffer sections 14 on the same surface of the base structure section 10, as shown in FIG.

[0024] On the other hand, when the center of gravity of the packaged object is biased to one side (off-center of gravity), it is suitable to provide the auxiliary buffer section 14 between two main buffer sections 12 on the same surface of the base structure section 10 as shown in Fig. 6. This shock absorber 1b can suppress tilting that occurs during shock absorption.

[0025] 7 and 8 are schematic diagrams of shock absorbers constructed by stacking multiple flat plates together. Shock absorber 1c can be constructed by stacking multiple plate-like members 30a, b, and c. Shock absorber 1d can also be constructed by stacking multiple plate-like members 30d, e, and f. Each plate-like member 30 can be easily manufactured without using advanced molding techniques such as injection molding, so shock absorbers can be manufactured efficiently and inexpensively.

[0026] 9 is a perspective view of an impact cushioning material that does not have a storage space for a packaged object. This impact cushioning material 1e is composed of a flat base structure 10e and an impact cushioning rib structure 20e provided on one surface of the base structure 10e.

[0027] This impact-absorbing rib structure 20e is composed of a main buffer portion 12 supported by a base structure portion 10e and having a cubic or rectangular parallelepiped shape, and an auxiliary buffer portion 14e supported by the base structure portion 10 at both ends and having a shape that is spaced apart from the base structure portion 10 between the both ends.

[0028] This shock-absorbing material 1e differs from the shock-absorbing material 1 in Fig. 2 in that the base structure 10e does not have a space for accommodating the packaged object. The shock-absorbing material 1e absorbs shock applied to the packaged object by attaching the shock-absorbing rib structure 20e formed in a flat shape to the packaged object in contact therewith.

[0029] In this configuration, as in the case shown in Figure 2 above, a combined stress action is generated between the auxiliary buffer section 14e and the main buffer section 12, which can absorb shock with a higher shock absorption efficiency than the conventional specifications (see Figure 1) and reduce the maximum impact force applied to the packaged item.

[0030] 10 is a perspective view showing shape variations of the auxiliary shock absorbing part 14. The auxiliary shock absorbing part 14 can have various shapes according to the packaged object to which it is attached and / or the expected impact.

[0031] The auxiliary buffer section 14 shown in (a) is composed of two vertically arranged support columns 16 and a horizontal beam section 18 that is supported by the support columns 16 and spaced apart from the surface of the base structure section 10. This auxiliary buffer section 14 is structured so that the horizontally arranged beam section 18 receives an evenly distributed load, and has the effect of exerting a large bending stress when a localized load is received. This is suitable for packaged objects with a large mass.

[0032] The auxiliary shock absorber 14 shown in (b) is made up of two support pillars 16 that are arranged at an angle to the surface of the base structure and intersect with each other. This auxiliary shock absorber 14 is prone to bending when subjected to a local load, and can apply a small bending stress. This is suitable for packaged items with a small mass.

[0033] The auxiliary buffer section 14 shown in (c) is composed of two support columns 16 each disposed at an angle to the surface of the base structure, and a beam section 18 supported by the two support columns 16 and disposed horizontally to the surface of the base structure 10. This auxiliary buffer section 14 is structured so that the horizontally disposed beam section 18 receives an evenly distributed load, while the two support columns 16 are more likely to bend due to the longer distance between them, allowing a small bending stress to be applied. This is also suitable for packaged items with a small mass.

[0034] The auxiliary buffer sections 14 shown in (d), (e), and (f) are provided in two or more units in a row in the longitudinal direction. These auxiliary buffer sections 14 have a short distance between the support sections, so they are more likely to have a large bending stress effect. This is suitable for packaged objects with a large mass.

[0035] 11 is a perspective view of the shock absorber with a modified main buffer section. The main buffer section 12f has a slope on both sides in the longitudinal direction, and the area of ​​the bottom surface of the main buffer section 12f supported by the base structure section 10 is larger than the area of ​​the top surface. In other words, the main buffer section 12f has a tapered structure.

[0036] As the compressive deformation of the main buffer portion 12f progresses, the area of ​​the compressed portion increases, so that the main buffer portion 12f can absorb a larger amount of impact energy. Note that the main buffer portion 12f may have at least one pair of opposing side surfaces with a gradient.

[0037] Fig. 12 is a perspective view of a shock absorber having an opening for accommodating a deformed portion of the auxiliary buffer section. As shown in Fig. 12, the base structure section 10g has an opening 8 directly below the auxiliary buffer section 14 in the vertical direction. When the auxiliary buffer section 14 is bent and deformed, the deformed portion is accommodated in the opening 8 (see Fig. 13). Even if the auxiliary buffer section 14 is significantly deformed, it does not fall into a state of only compressive deformation, but can assume a targeted bending deformation state, so that a compound stress can be generated together with the main buffer section 12.

[0038] These shock absorbing materials 1 (1a to 1g) are preferably made of foamed resin cushioning material, although this is not limiting.

[0039] The shock absorbing material of the present embodiment is attached to an image forming apparatus (e.g., a copying machine, a printing machine, etc.) as a packaged object, and is packaged in a packaging material (e.g., a cardboard box). This packaging material is used in a packaging system that includes packaging machinery and equipment.

[0040] (Comparative verification test) A comparative verification test of impact acceleration was carried out between a conventional shock absorber and a shock absorber according to the present invention. Verification method: At the same buffer distance, the impact acceleration was compared between the conventional specification (Fig. 1) and the specification of the present invention (Fig. 2). Conditions: The shock absorbing material is expanded polyethylene (EPE: apparent density 22.5 kg / m 3 product) was used. Results: As shown in Table 1, the average impact acceleration of the present invention was approximately 20% lower than that of the conventional specification.

[0041] [Table 1]

[0042] The present invention has been described in detail above using the embodiments. The embodiments are merely examples, and various modifications can be made without departing from the scope of the present invention. For example, a plurality of the embodiments may be combined with each other. [Explanation of symbols]

[0043] 1, 1a, 1b, 1c, 1d, 1e Shock absorbing material 5. Containment Space 8 Openings 10, 10e, 10g Base structure 12, 12f Main buffer section 14, 14e Auxiliary buffer section 16 Post section 18 Beam section 20, 20e Shock absorbing rib structure 30a-f Plate-shaped members [Prior art documents] [Patent documents]

[0044] [Patent Document 1] Japanese Patent Application Publication No. 09-328172

Claims

1. A shock absorbing material including a base structure having a space for accommodating an object to be wrapped and a shock absorbing rib structure provided on at least one surface of the base structure, The shock absorbing rib structure is A main buffer portion that is fixed to and supported by the base structure portion, has a cubic or rectangular parallelepiped shape, and is compressively deformed by an external impact; the package is supported at both ends by the base structure, and the portion between the two ends has an arch-like shape spaced apart from the contact portion between the base structure and the packaged object, and is configured by arranging in parallel an auxiliary buffer portion which is compressed and bent by an external impact, An impact cushioning material characterized in that a composite stress action is generated by combining the main cushioning portion and the auxiliary cushioning portion.

2. 2. The shock absorber according to claim 1, wherein at least one of the main shock absorber and the auxiliary shock absorber is provided on one surface of the base structure.

3. 3. The shock absorber according to claim 1, wherein the main shock absorber and the auxiliary shock absorber are provided on a plurality of surfaces of the base structure.

4. 4. The shock absorber according to claim 3, wherein the main shock absorbers and the auxiliary shock absorbers are provided on five surfaces of the base structure.

5. 5. The shock absorber according to claim 1, wherein the main buffer portion is provided between two of the auxiliary buffer portions that are on the same surface of the base structure portion.

6. 6. The shock absorber according to claim 1, wherein the auxiliary buffer section is provided between two of the main buffer sections that are on the same surface of the base structure section.

7. 7. The shock absorber according to claim 1, which is formed by overlapping a plurality of plate-like members.

8. A shock absorbing material including a flat base structure and a shock absorbing rib structure provided on one surface of the base structure, The shock absorbing rib structure is A main buffer portion that is fixed to and supported by the base structure portion, has a cubic or rectangular parallelepiped shape, and is compressively deformed by an external impact; the base structure is supported at both ends, and the base structure and an auxiliary buffer section between the both ends have an arch-like shape spaced apart from the contact portion between the base structure and the packaged article, and are compressed and bent by an external impact, and are arranged in parallel, and the packaged article is attached in contact with the packaged article; An impact cushioning material characterized in that a composite stress action is generated by combining the main cushioning portion and the auxiliary cushioning portion.

9. The auxiliary buffer unit includes: Two support columns provided perpendicular to a surface of the base structure; 9. The shock absorbing material according to claim 1, further comprising a beam portion supported by the two support columns and disposed horizontally apart from the surface of the base structure.

10. The auxiliary buffer unit includes:

9. The shock absorber according to claim 1, characterized in that it is composed of two support pillars each disposed obliquely with respect to a surface of the base structure and intersecting each other.

11. The auxiliary buffer unit includes: Two support columns each provided at an angle to a surface of the base structure; 9. The shock absorbing material according to claim 1, further comprising a beam portion supported by the two support columns and disposed horizontally relative to a surface of the base structure.

12. 12. The shock absorber according to claim 1, wherein the auxiliary shock absorber comprises two or more auxiliary shock absorbers arranged in series in the longitudinal direction.

13. The main buffer portion supported by the base structure portion has at least one pair of opposing side surfaces provided with a slope; 13. The shock absorber according to claim 1, wherein an area of ​​a bottom surface of the main shock absorber supported by the base structure is larger than an area of ​​an upper surface of the main shock absorber.

14. 14. The shock absorber according to claim 1, wherein the base structure portion has an opening directly below the auxiliary shock absorber in the vertical direction.

15. 15. The shock absorber according to claim 1, wherein the shock absorber is made of a foamed resin.

16. A packaging material for packaging an object to be packaged, the object having the impact cushioning material according to any one of claims 1 to 15 attached thereto.

17. A packaging system using the packaging material according to claim 16.

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