JP2005178797A - Shock-absorbing cushion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock-absorbing cushion which is adaptable to works to be packed of various kinds of shapes and capable of adequately holding the works and absorbing shocks thereon as well as damping the vibration during the transport through the compression and deformation. <P>SOLUTION: In the shock-absorbing cushion comprising a flexible and air-permeable bag having a recessed part to cover an outer surface of a work to be packed, and a plurality of spherical bodies of substantially the same size which have spaces adjacent to each other inside the bag and are stored at a predetermined density, the external force applied from an outer part side of the bag is damped through elastic compression and deformation of the spherical bodies caused by the movement thereof within a range of the space, and the works are protected from the external force. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an impact-absorbing cushion, and more particularly to a cushion or a packaging material that includes a granular material inside and can be used as a packaging material.

  Conventionally, when packing an object to be packed in a packing box, for example, as shown in FIGS. 1A and 1B, concave portions 3a, 3b ( 3b is not shown in the figure), using a holding body 2a, 2b having a structure in which the object to be packed 1 is fitted into the recesses 3a, 3b, respectively, and the object to be packed 1 is fixed in the packing box so as not to move. Has been.

  As described above, the method for packing an object to be packed in the packing box using the molded holding body has different external shapes of the object 1 to be packed, so that the recesses 3a and 3b according to the respective objects to be packed are used. The holding bodies 2a and 2b having the shape of the above are required, so that the holding body cannot be made common and the packaging cost cannot be reduced, and when the packaged object has a complicated outer shape, it is not easy to manufacture the holding body itself. was there.

  With regard to such a problem, for example, as seen in Patent Document 1, a packaging box having a variable inner volume by moving a plurality of box members relative to each other, and a bag formed of a breathable material and having a deaeration port And a fitting body that is provided in the bag body and includes a granular body that is in close contact with each other and becomes solidified as the air in the bag body is deaerated, and is disposed on the inner surface side of the packaging box. By using the structure of the packing device that degass the air in the bag body by making the inner volume relatively close to reduce the internal volume and keep the fit body following the outer shape of the packaged object, it can be of any shape It is possible to securely hold the object to be packed in the packing box.

JP 2001-163361 A

  In many cases, when a package or a packaging box is loaded and transported, a land route such as a truck is transported. At this time, the product to be transported, that is, the packaged item, is loaded with a horizontal impact caused by contact between the packaging boxes and a weak vertical vibration caused by unevenness of the road surface. Here, the impact in the horizontal direction is firmly fixed and absorbed by providing a buffer portion between the packing box and the conventional packing holder or the fitting disclosed in Patent Document 1. Is possible.

  However, weak vibrations in the vertical direction are repeatedly applied to the packaging box, and depending on the material characteristics of the packaging box and the cushioning material, there are cases where the vibration cannot be sufficiently deformed and cannot be damped. In the holding bodies 2a and 2b shown in FIGS. 1 (a) and 1 (b), there are cases where protrusions 4 are provided to reduce the area for transmitting such vibrations, but they remain solid with the article 1 to be packed. Therefore, the transmitted vibration directly acts on the article 1 to be packed. Further, in the fit body disclosed in Patent Document 1, since the bag body and the granular body are fixed without gaps by degassing the internal air, compression deformation in the top-and-bottom direction cannot be performed, and such a weak body. There was a problem that vibration could not be absorbed.

  In addition, in order to attenuate the above-mentioned weak vibration, for example, a foamed polyurethane cushioning material may be used. Although foamed polyurethane has a high effect of absorbing vibration, it is expensive as a material. Furthermore, since it cannot be recycled, there is a problem in that it cannot be discarded after use as a cushioning material, affecting the environment.

  Therefore, the present invention provides an impact absorbing cushion that can be applied to various shapes of packed objects, can appropriately hold the packed objects to absorb impacts, and can compress and deform to attenuate vibration during transportation. The purpose is to provide.

  Another object of the present invention is to provide a box structure for transportation using the shock absorbing cushion.

  In order to achieve such an object, the present invention provides a bag body having a recess that is soft and breathable and that can cover the outer surface of an object to be packaged. A shock absorbing cushion comprising a plurality of spherical bodies having substantially the same size and having gaps between each other and accommodated at a predetermined density, wherein the spherical bodies receive an external force applied from the outside of the bag body. It is configured to be attenuated by moving within the space and elastically compressive deformation to protect the packaged object from external force. According to such a configuration, it is possible to deal with various shapes of packed objects, appropriately hold the packed objects to absorb impacts, and compressively deform to attenuate vibration during transportation. A shock absorbing cushion can be realized.

  The shock absorbing cushion according to claim 1 may be configured such that the bag body and the spherical body are formed of the same material, for example, as in claim 2. According to such a configuration, the bag body and the spherical body are made of the same material, and the transmitted vibration frequency and resonance range can be reduced.

  The impact absorbing cushion according to claim 1 or 2 may be configured such that the bag and the spherical body are formed of a recyclable synthetic resin material, for example, as described in claim 3. According to such a configuration, it is possible to realize a shock absorbing cushion that can be recycled and is low in cost.

  Further, according to the present invention, as in claim 4, a shipping box comprising a housing part that accommodates an object to be packed and a lid part that fits and seals the housing part after the object to be packed is accommodated. It is a type | mold structure, Comprising: The shock absorption cushion as described in any one of the said Claims 1-3 is each attached to the inner side of the said accommodating part and the said cover part, and the said shock absorption cushion is contacted with the said to-be-packaged object. It may be configured to be held and fixed. According to such a structure, it becomes a structure which can be regularly stacked on the shape of the box member and the shock absorbing cushion can function inside the box member, and transportation work is facilitated.

  According to the present invention, it is possible to cope with various shapes of packed objects, and the shock absorbing cushion can appropriately hold the packed objects to absorb impacts and compressively deform to attenuate vibrations during transportation. Can be realized.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, Embodiment 1 according to the present invention will be described in detail with reference to the drawings. FIG. 2 shows an external appearance of the packing object 1 when it is packed using the shock absorbing cushions 12a and 12b according to the first embodiment. As shown in FIG. 2, the impact cushions 12 a and 12 b are configured to be deformable so as to follow the shape of the packaged object 1. In the following, as shown in FIG. 2, shock absorbing cushions 12 a and 12 b having the same configuration on the left and right sides that fit the package object 1 so as to cover the left and right ends are used, and therefore one cushion 12 a is taken as an example. I will explain.

  FIG. 3 schematically shows the configuration of the shock absorbing cushion 12a according to the first embodiment, and FIG. 3 (a) is a view seen from the direction of fitting with the packaged object 1, and FIG. 3 (b). FIG. 4 is a cross-sectional view taken along line AA in FIG. The shock absorbing cushion 12a has a substantially box shape including an opening 13a, and forms a bag using a soft and breathable synthetic resin material such as polyethylene. As shown in FIG. 3B, the shock absorbing cushion 12a has a substantially U-shaped cross section covered with a bag, and protects an object to be packaged from an impact other than the direction of the opening 13a. It has a structure to do. Here, in the first embodiment, the shock absorbing cushion has a substantially U-shaped cross section. However, since the bag body itself is made of a soft synthetic resin as described above, the packaged item is used at the time of use. The shape which can be fitted so that it may cover without gaps may be taken.

  A large number of spherical bodies 14 made of synthetic resin such as polystyrene or polyethylene are accommodated in the shock absorbing cushion 12a. 4A and 4B are enlarged views of a region indicated by a dotted line B in FIG. 3A. FIG. 4A shows a state before the impact force P is applied, and FIG. A loaded state is schematically shown. The granular material 14 is accommodated in the bag structure of the shock absorbing cushion 12a at a density having gaps 15 between the granular materials 14 to such an extent that the shape of the entire cushion can be maintained. 18 to 22 spherical bodies are accommodated at a density of cubic centimeters.

  As shown in FIG. 4 (a), the shock absorbing cushion 12a has an outer side surface 16a that forms the outer periphery and an inner side surface 16b that slidably contacts the article 1 to be packaged. Spherical bodies 14 are distributed between these two surfaces at a predetermined density. Since the spherical body 14 is provided with an appropriate gap 15, it can behave like a fluid particle inside the cushion 12 a. For this reason, even when the outer shape of the article to be packed 1 is uneven, it is possible to hold the inner surface 16b made of a soft synthetic resin in close contact so as to follow the uneven shape. As shown in FIG. 4, when the impact force P as shown by the arrow is applied to the outer side surface 16a of the shock absorbing cushion 12a, the outer side surface 16a is deformed in the direction of the inner side surface 16b. At this time, the inner side surface 16b cannot be moved or deformed because it is in contact with the object 1 to be packed, but the spherical body 14 can be moved by the gap 15 between them, so that FIG. As shown in FIG. 5, the shock absorbing cushion 12a is compressed and deformed. Further, since the cushion 12a is not restrained before and after the load is applied, when the external force such as the impact force P is removed, the air gap 15 returns to an appropriate equilibrium state again, that is, the shock absorbing cushion 12a is elastically compressed and deformed. Thus, it is possible to absorb impact force and attenuate weak vibrations.

  FIG. 5 shows the results of a response characteristic test using a vibration tester using the conventional holding bodies 2a and 2b shown in FIG. 1 and the shock absorbing cushions 12a and 12b according to the first embodiment shown in FIG. Show. Here, FIG. 5A shows the case where the conventional holding bodies 2a and 2b are used, and FIG. 5B shows the case where the shock absorbing cushions 12a and 12b according to this embodiment are used. In the vibration test, a linear vibration type vibration tester (not shown) is used, and a wooden packing material with a weight of 1.7 kg is fitted to each holding body, held, and fixed to the testing machine. went. The test conditions are vertical vibrations, with an amplitude of 2 mm (constant) loaded for 1 minute (constant), and the acceleration sensor is used to set the maximum amplitude value of the packaged object every 0.1 Hz for an amplitude frequency of 5 to 50 Hz. Measured.

  When the conventional holding bodies 2a and 2b were used, a response waveform having a maximum amplitude value of 7.4 mm at 26.2 Hz was obtained as shown in FIG. It is considered that this is because the resonance occurs at the natural vibration frequency of the holding bodies 2a and 2b of 26.2 Hz, so that the response is greater than the amplitude of vibration. On the other hand, when the shock absorbing cushions 12a and 12b according to the first embodiment are used, a maximum amplitude value of 2.8 mm is obtained at 18.3 Hz under the same test conditions as shown in FIG. A response waveform was obtained. From this, it was found that the shock absorbing cushions 12a and 12b according to the first embodiment both have a peak response frequency and a maximum amplitude value smaller than those of the conventional holding bodies 2a and 2b. That is, the shock absorbing cushion 12a according to the first embodiment has an effect of reducing the height and the number of times of the movement (bounce jump) of the packaged object 1 in the vertical direction as compared with the case where the conventional holding body 2a is used. I know that there is.

  By adopting the above configuration, it is possible to deal with various shapes of packed items, and it is possible to hold the packed items appropriately to absorb impacts and to compress and deform to attenuate vibration during transportation. It is possible to provide a shock absorbing cushion.

  Further, as shown in the first embodiment, by using the same synthetic resin material, such as polyethylene, for the material of the shock absorbing cushion and the spherical material accommodated therein, the bag and spherical The body material is the same, and the transmitted vibration frequency and resonance range can be reduced. In particular, when polyethylene is used, even if it is discarded after transportation, it can be recycled all at once, and the transportation cost can be greatly reduced.

  Furthermore, as shown in FIG. 6A, the shock absorbing cushion of the first embodiment is attached to the inner surface side of each of the lid portion 21a and the accommodating portion 21b of the box-type structure 20 that accommodates the article 1 to be packed. It may be used. That is, as shown in FIG. 6B, which is a cross-sectional view taken along the plane C shown in FIG. 6A, the article to be packed 1 includes an impact absorbing cushion 12 c provided on the inner surface side of the lid portion 21 a, It is fixed so as to be sandwiched between the shock absorbing cushion 12d provided on the inner surface side of the accommodating portion 21b. By adopting such a configuration, it is possible to load regularly according to the shape of the box structure, and the shock absorbing cushion can function inside the box structure, thereby facilitating transportation work.

  The first embodiment described above is only one of the best modes for carrying out the present invention, and the present invention can be implemented with various changes and modifications without departing from the gist thereof.

It is a perspective view which shows the structure of the conventional impact absorption holder for transportation, and arrangement | positioning with a to-be-packaged object. It is a schematic diagram which shows arrangement | positioning with the to-be-packaged goods 1 of the impact-absorbing cushion 12a, 12b by Example 1 of this invention. Fig. 3 schematically shows a configuration of an impact absorbing cushion 12a according to the first embodiment of the present invention. Fig. 3 (a) is a view seen from the direction of fitting with an article 1 and Fig. 3 (b) is a diagram. It is sectional drawing cut | disconnected by the AA line | wire in 3 (a). 3A is an enlarged view of a region indicated by a dotted line B in FIG. 3A, FIG. 4A is a state before the impact force P is applied, and FIG. 4B is a state in which the impact force P is applied. Is schematically shown. FIG. 5A shows a response waveform obtained by a response characteristic test using a vibration tester. FIG. 5A shows a case where the conventional holding bodies 2a and 2b are used, and FIG. 5B shows a shock absorbing cushion 12a according to this embodiment. The waveforms when 12b is used are shown. The structure of the box-type structure 20 using the shock absorbing cushions 12c and 12d according to the first embodiment is shown. FIG. 6 (a) is a perspective view of the box-type structure 20, and FIG. It is sectional drawing cut | disconnected by the surface C in 6 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaged object 12a, 12b, 12c, 12d Shock absorption cushion 13a Opening part 14 Spherical body 15 Space | gap 16a Outer side surface 16b Inner side surface 20 Box-shaped structure 21a Lid part 21b Storage part P External force

Claims (4)

A bag body having a recess that is soft and breathable and that can cover the outer surface of an object to be packed, and a plurality of substantially the same sizes that are accommodated at a predetermined density with gaps inside the bag body A shock absorbing cushion consisting of a spherical body of
The external force applied from the outside of the bag body is attenuated by moving the spherical body within the space and elastically compressing and deforming to protect the packaged goods from the external force. Absorption cushion. The shock absorbing cushion according to claim 1, wherein the bag body and the spherical body are formed of the same material. 3. The shock absorbing cushion according to claim 1, wherein the bag body and the spherical body are made of a recyclable synthetic resin material. A transporting box-type structure comprising a housing part for housing an object to be packed and a lid part that fits and seals with the housing part after the object to be packed is accommodated, wherein the housing part and the lid part The shock absorbing cushion according to any one of claims 1 to 3 is attached to each of the insides of the boxes, and the shock absorbing cushion is held and fixed in contact with the packed object. Structure.

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