JP3286695B2 - Buffer packaging material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock-absorbing packaging material for holding an article to be packaged, such as a component of an electronic device, in a packaging state without any risk of damage.

[0002]

2. Description of the Related Art Conventionally, when packaging a relatively light weight package such as a hard disk drive of a personal computer and having a particularly low allowable G value (impact value), a relatively flexible elasticity is required. Using a cushioning material made of a synthetic resin foam having a foam, for example, a flexible polyurethane resin foam or a polyethylene resin foam, the packaged material is stored and held in the cushioning material, and then stored in an outer box such as cardboard. (See, for example, JP-A-7-242272).

As shown in FIGS. 10 and 11, a cushioning material made of a flexible polyurethane resin foam is formed by bonding an annular member (52) to a flat bottom plate (51) and accommodating a space for storing articles to be packaged. (53) and a plate-like upper body (55), wherein the housing space (5
In 3), the article to be packaged (B) is housed and held, and then housed in an outer box for packaging.

[0004] Although the cushioning material of this soft polyurethane resin foam has a form in which the outer surface is entirely in contact with the outer box, the cushioning material is liable to cause a bottoming-out phenomenon when dropped.
Value (impact value) is high, and a sufficiently satisfactory buffer effect cannot be obtained. Also, many materials are required to eliminate the bottoming phenomenon.

In particular, when the allowable G value is low,
It is necessary to reduce the receiving area, but in the case of a flexible soft polyurethane resin foam, there is a problem such as the supporting strength of the packaged object. Easy and practically problematic.

Further, there are many hard disk drives as packages to be packed in different sizes, and in the cushioning material of the flexible polyurethane resin foam, the hard disk drive can be used for any of these different packages. The storage space (53) is formed in accordance with a small packaged object, and cuts (56) are made at four corners of the annular member (52) in order to enable storage of a large packaged object. Annular member (5
Although the inside of 2) is elastically expanded and deformed to be pushed in and accommodated, the cushioning material around the packaged material is compressed, and sufficient cushioning is not obtained, and Bottom phenomenon easily occurs.

In the case of a cushioning material made of a polyethylene resin foam, it is considered that a rib-like projection is formed on the outer peripheral portion by integral molding, and the projection is brought into contact with the outer box to be supported. However, depending on the form of the protrusion, filling failure may occur at the time of molding, and even if it is moldable, cracking or buckling may occur at the time of dropping, so that the packaged goods may not bottom out. It may cause the phenomenon and damage.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is capable of safely storing and holding an article to be packaged, exhibiting a sufficient cushioning effect against a drop impact in any direction, and having a complicated structure. It is intended to provide a cushioning packaging material that can be easily formed without the need for shaping the shape and contribute to cost reduction, and further provides a cushioning packaging material that can be easily separated and collected for recycling. is there.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 has a pair of cushioning members opposed to each other and accommodates and holds an article to be packaged therebetween. A cushioning packaging material, wherein the cushioning material is a molded article of a synthetic resin foam having a suitable rigidity, and a holding member having a receiving recess for receiving an object to be packaged on the opposite surface; Made of synthetic resin foam with more elasticity than
It is characterized by comprising leg members that are combined in a vertical and horizontal cross shape on the back surface side of the housing concave portion of the holding member and are attached so as to form a protruding shape on each surface continuously from the back surface to the four circumferential side surfaces. I do.

According to this cushioning packaging material, the pair of cushioning materials configured as described above are accommodated in the accommodation recesses of the respective holding members and are brought into contact with each other, and are accommodated in an outer box made of cardboard or the like. And wrap.

In this packaged state, the accommodated packaged object is covered with both holding members made of foam having appropriate rigidity and is held with good stability.
A flexible and elastic leg member mounted on each of the outer surfaces so as to protrude from each surface partially supports the outer case and is elastically supported. Therefore, the impact on the holding member at the time of dropping or the like can be effectively absorbed, and there is no possibility that the packaged product bottoms out, and the G value for the packaged product also decreases.

According to a second aspect of the present invention, in the cushioning packaging material, two vertical and horizontal leg members are combined in a cross-gear shape on the back side of the holding member, and both end portions of each leg member are formed on the side surface of the holding member. And is detachably mounted by means of fitting into concave grooves formed on at least a part of the back surface and the side surface of the holding member, respectively.

[0013] In this case, the supporting structure of the holding member by the cross-shaped leg members is stable, and the holding member and the leg members can be easily mounted by the fitting means despite the fact that they are made of different materials. In addition, separate collection or separate disposal for recycling is facilitated.

According to a third aspect of the present invention, in the cushioning wrapping material, a groove in the shape of a girder is formed on a back surface of the holding member, and a groove continuous from the groove is formed on four side surfaces. One of the vertical and horizontal leg members is fitted into the concave groove, and the other two leg members are fitted to the leg member and fitted into the concave groove. It is one that is attached.

In this case, each of the vertical and horizontal leg members is mounted on the holding member with good stability, and one of the vertical and horizontal leg members serves as a pressing member for the other leg member, and the stability of the mounted state is good. become.

According to a fourth aspect of the present invention, the leg member is formed by stamping out a sheet material of a required thickness of a flexible and elastic synthetic resin foam, thereby providing a relatively flexible member separate from the holding member. A leg member made of a synthetic resin foam, even if it has a protruding part and both ends have a bent shape, can be easily formed by punching from a flat plate material,
It is easy to manufacture even with a composite structure of different materials.

According to a fifth aspect of the present invention, there is provided the cushioning packaging material, wherein the packaging material is made of a flexible and elastic synthetic resin foam, and is fitted into the receiving recess of the holding member to be slightly smaller than the receiving recess. It is characterized by comprising a spacer member that forms an accommodation section for an object.

In this case, by fitting the spacer member into the housing recess of the holding member, it is possible to form a housing portion corresponding to an object to be packaged having a smaller size than usual, so that the spacer member is provided in advance. Thus, the buffer packaging material can be used for packaging, for example, two types of large and small items to be packaged.

If the leg member is formed by punching out a synthetic resin foam plate, the spacer member can use the trimming loss portion of one of the vertical and horizontal leg members. It can be manufactured at low cost.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described based on embodiments shown in the drawings.

FIG. 1 is a perspective view of a pair of cushioning materials showing one embodiment of a cushioning packaging material according to the present invention used for packaging a hard disk drive of a personal computer. FIGS. FIG. 4 is a cross-sectional view of one cushioning material in the horizontal and vertical directions, FIG. 4 is a plan view of one cushioning material, and FIG. 5 is a perspective view showing the back side of the holding member and one of the leg members in both the vertical and horizontal directions. .

The cushioning wrapping material of the present invention comprises a pair of upper and lower cushioning materials (A1) and (A2) as shown in FIGS. 1 to 3, wherein the two cushioning materials (A1) and (A2) are opposed to each other. Thereby, the packaged object (B1) can be accommodated and held between them. The pair of cushioning materials (A1) and (A2)
A holding member (1) for holding the article to be packaged (B1), and a vertical and horizontal crossing, for example, a cross-shaped or cross-shaped combination on the back surface side of the holding member (1), and continuous from the back surface to four side surfaces; And supporting leg members (2) and (3) mounted so as to protrude on each side. Especially in the case of the figure, the upper and lower cushioning materials (A1) and (A2) are symmetrically identical. And has the following configuration.

Each holding member (1) for both cushioning materials (A1) and (A2)
Is a synthetic resin foam having a moderate rigidity, for example, a polystyrene resin foam such as a polystyrene resin or a copolymer mainly composed of styrene, and other relatively hard synthetic resin foams, especially molded articles formed by bead foam molding. As shown in the figure, a flat rectangular shape is formed according to the form of the packaged object (B1) such as a hard disk drive, and the two holding members (1) and (1) are in a state where they are opposed to each other. An accommodation recess (11) capable of accommodating the article to be packaged (B1) is formed. The vertical and horizontal dimensions and depth of the storage recess (11) are formed according to the packaged object (B1) to be stored,
In particular, when the size of the article to be packaged is two sizes, the accommodation recess (11) is formed so as to accommodate the article (B1) of large size.

Further, two concave grooves (12) and (13) are provided on the back surface of the accommodation recess (11) of the holding member (1), that is, on the back surface which becomes the bottom surface or the top surface when used.
Are formed so as to cross each other in a grid pattern, and furthermore, the grooves (12a) and (13a) are formed on the four circumferential side surfaces continuously from the grooves (12) and (13). The polystyrene resin foam used for the holding member (1) has good moldability in terms of material, and the above-mentioned concave groove can be easily formed without any problem.

Further, as shown in the figure, the leg members (2), (2) and (3) (3), each having two vertical and horizontal legs, which are combined in a grid on the back side of the holding member (1) as shown in the figure. And a synthetic resin foam, each having a more flexible elasticity than the holding member (1) and a moderate shape retention, for example, a polyolefin resin such as a copolymer mainly composed of polyethylene, polypropylene and olefin. A concave groove (12) formed of a foam and provided on the back side of the holding member (1);
(13) and the concave grooves (12a) and (13a) provided on the four side surfaces, and are mounted so as to protrude from the back surface and the side surface of the holding member (1). The width of the leg members (2) and (3) is made slightly larger than the width of the concave grooves (12) (12a) and (13) (13a), and the elasticity of the material is used to make use of the elasticity. When it is elastically fitted into the concave groove, it does not easily come off and the mounting state is stable.

In the illustrated embodiment, one of the vertical and horizontal leg members (2) and (3), for example, the leg member (2) in the vertical direction (along the long side of the holding member) is connected to the holding member (2). A central portion (21) attached to the back surface of 1), and the central portion (21);
Both end portions (22) and (22), which extend in a more perpendicular direction and are attached so as to be in contact with the side surfaces on the shorter side of the holding member (1), are formed so as to have a substantially concave shape. Further, a protruding surface portion (23) is provided in the vicinity of both ends of the central portion (21) to come into contact with the exterior box (C), and the both end portions (22) and (22)
The upper end and the lower end are chamfered on the outer side surface, and a protruding surface portion (24) that comes into contact with the exterior box is formed in the center portion.

Further, the other leg member (3) in the lateral direction (along the short side of the holding member) has a central portion (31) mounted on the back surface of the holding member (1) and a right angle direction from both ends thereof. The holding member (1) is formed so as to form a substantially concave shape with both end portions (32) and (32) mounted so as to be in contact with the long side surface of the holding member (1). Further, similarly to the leg member (2), a protruding surface portion (33) is provided near the both ends of the central portion (31) so as to be in contact with the exterior box (C). The outer side surface is chamfered at the upper end and the lower end, respectively, and a projecting surface (34) is formed at the center to come into contact with the exterior box (C).

In particular, the leg member (3) has a central portion (2) near the both ends of the central portion (31).
Notches (35) and (35) to be fitted in 1) are provided, and are located above the central portion (21) of the one leg member (2) with respect to the concave grooves (13) and (13a) of the holding member (1). It can be fitted from.

That is, when assembling the cushioning members (A1) and (A2), first, the leg members (12) and (12a) are inserted into the vertical concave grooves (12) and (12a) formed from the back surface to the side surface of the holding member (1). 2) Fit and install, then lateral leg members (3)
Can be easily assembled and configured by fitting the notch (35) into the central portion (21) of the leg member (2) and fitting it into the concave groove (13) (13a). In addition, the leg members (2) and (3) thus mounted are mounted on the holding member (1) on the back surface and side surfaces by means of fitting, and have good stability. 2) is pressed by the other leg member (3), and there is no risk of displacement or removal.

Each of the leg members (2) and (3) can be manufactured by molding. However, in view of easiness of manufacture and cost, the leg member is made of the flexible synthetic resin foam. (2) It is preferable to punch and form the above-mentioned shape from a flat plate material having a predetermined thickness corresponding to the width of (3), mainly a plate material formed by extrusion foaming.

The expansion ratio of the synthetic resin foam used for the leg members (2) and (3), and the protruding surfaces (23), (24) and (3)
3) The protruding dimension and the area of the contact surface in (34) can be appropriately set in consideration of the supporting force and stability in the packaged state.

FIG. 6 shows a spacer member (5) used for storing an object to be packaged which is one size smaller than the above-mentioned object to be packaged (B1). This spacer member (5)
Are provided separately in addition to the holding member (1) and the leg members (2) and (3). For example, as shown in FIG.
When packaging small-sized items (B2),
As shown by the dashed line, the holding recess (1) of one holding member (1) is
1), two spacer members (5) are fitted so as to form the small-sized package receiving section (11a). It is also possible to provide a plurality of types of spacer members (5) that form accommodation portions having different sizes.

As in the case of the leg members (2) and (3), the spacer member (5) can be separately molded or punched out of a flat synthetic resin foam. In particular, when each of the leg members (2) and (3) is formed by punching from a synthetic resin foam plate material, as shown in FIG. 7, one (lateral) leg member (3) is punched. Each of the trimming loss portions (36) is formed by a protrusion (37) corresponding to the notch (35) (35) of the central portion (31) of the leg member (3).
(37) has a substantially U-shape as shown in FIG. 6 formed at both ends. Therefore, the two trimming loss portions (36) formed by hollowing out the two leg members (3) are inserted into the receiving recesses (11) of one of the holding members (1) as shown by chain lines in FIG. Can be used as a spacer member (5) for forming the accommodating portion (11a) of the small-sized packaged object (B2) by utilizing the elasticity of the package. Further, when the thickness of the packaged object (B2) is within the depth of the housing recess (11) of the one holding member (1), the housing recess of the other holding member (1) as shown in FIG. (11) Another spacer member (6) made of a trimming loss or the like is fitted into the package member (B2) to be stored.
You should be able to press.

This eliminates the need for special stamping or molding of the spacer members (5) and (6), which is economical.

As described above, when the trimming loss portion is used as a spacer member, the position where the leg members (2) and (3) are fitted to the holding member (1), that is, the concave groove (12). The positions and depths of (12a), (13), and (13a) are designed to be optimal positions according to the dimensions of the small-sized packaged object.

When the buffer packaging material of the above embodiment accommodates and packs a large-size packaged object (B1), as shown in FIG. 8, the buffer packaging material (A1) (A2) of the pair of upper and lower cushioning materials (A1) (A2) The package (B1) is accommodated in the accommodation recess (11) of one of the holding members (1), and the other cushioning material is placed on the object (B1) so that the accommodation recesses (11) of the two holding members (1) and (1) are covered. ) Hold the packaged object (B1) in (11). This may be stored in an outer box (C) made of cardboard or the like.

In the case of packaging a small-sized packaged object (B2), as shown in FIG. 9, a small accommodating portion (5) formed by fitting the spacer members (5) and (6) into the accommodating recess (11). What is necessary is just to pack and pack the article to be packaged (B2) in 11a).

In this storage state, the stored packaged object (B1) or (B2) is securely covered by the two holding members (1) and (1) made of synthetic resin foam having appropriate rigidity. It has good stability. This holding member (1)
Has the elasticity peculiar to foam, and the surface of the packaged object (B1) or (B2) inside is not damaged. Moreover, the elasticity is such that the holding members (1), (1) are mounted so as to form a grid on the back side of the accommodation recess (11), that is, the top and bottom surfaces of the packaged state, and to project on each side. Leg member (2)
According to (3), the outer box (C) is partially brought into contact with and is elastically supported. That is, the packaged items (B1) (B2)
The holding member (1) for holding the outer leg member (2)
(3) is supported with a space between the outer case (C) and the outer case (C), and the elasticity and the holding member (1) of the leg members (2) and (3) partially contact the outer case (C). Combined with its own buffering properties, it can effectively absorb the impact at the time of falling etc.,
There is no danger of bottoming of the packaged object, and the G value is also low.

For example, a drop impact test was carried out on the cushioning packaging material of the present invention for accommodating articles of the same size and the cushioning material of FIG. 10 made of a flexible polyurethane resin foam. As a result, the G value was greatly reduced as compared with the conventional product, and the result was obtained that the value was reduced by half depending on the direction.

In the case of the above embodiment, each of the vertical and horizontal leg members (2) and (3) is formed with respect to the concave grooves (12) (12a) (13) (13a) on the back surface and the side surface. Although the case of fitting and mounting is shown, in addition to this, fitting is performed by fitting into a concave groove formed partially on the back surface or side surface so as to form a protruding shape on each surface, or mounting using adhesive means It is also possible. However, for the purpose of separate collection for recycling after use, it is desirable to mount them by fitting means as in the above-described embodiment.

[0041]

As described above, according to the cushioning packaging material of the present invention, the holding member for holding the article to be packaged and the leg members on the outside thereof are formed of a different synthetic resin foam, and The rear surface of the housing recess is made by using a synthetic resin foam molded product that is rigid and has the elasticity peculiar to the foam, and the leg member is made of a flexible and elastic synthetic resin foam. With the cross structure such as a cross girder shape on the side and the mounting structure of the leg members that protrude on each side, the packaged object can be stably and safely held, and the drop impact in any direction Can exhibit a sufficient buffering effect, and can hold the packaged object without fear of damage.

Further, since the holding member and the leg member are separately formed and combined, even if the outer peripheral portion has a leg portion partially protruding on the outer periphery, the holding member and the leg member can be easily formed without complicated molding. It can be manufactured and separated and collected for recycling.

In particular, according to the second and third aspects, it is easy to mount the leg member on the holding member.
The stability of the support state is good, and the separation and collection for recycling is easy. In the case of the fourth aspect, a leg member having a special shape can be easily manufactured by punching and the cost can be reduced. In the case of claim 5, it can be commonly used for packaging, for example, two types of articles to be packaged having different sizes.

Therefore, the cushioning packaging material of the present invention can be suitably used as a cushioning packaging material for packaging a relatively light weight product having a particularly low allowable G value (impact value) such as a hard disk drive of a personal computer.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pair of cushioning materials showing one embodiment of the cushioning packaging material of the present invention.

FIG. 2 is a cross-sectional view of one of the cushioning members, taken along line XX.

FIG. 3 is a cross-sectional view taken along line YY of one cushioning material of the above.

FIG. 4 is a plan view of one cushioning material of the above.

FIG. 5 is a perspective view showing the back side of one of the cushioning member holding members and one of the leg members in both the vertical and horizontal directions.

FIG. 6 is a perspective view showing one of the spacer members.

FIG. 7 is a schematic plan view showing a trimming state of one leg member.

FIG. 8 is a sectional view of a normal packaging state.

FIG. 9 is a sectional view of a small-sized packaged object in a packaged state.

FIG. 10 is a perspective view showing an example of a conventional cushioning material.

FIG. 11 is a cross-sectional view of the same packaging state.

[Explanation of symbols]

 (A1) (A2) A pair of cushioning materials (1) Holding member (11) Recessed recess (2) Vertical leg member (3) Horizontal leg member (5) (6) Spacer member (21) Central part ( 22) (22) Both ends (23) (24) Projecting surface (31) Central part (32) (32) Both ends (33) (34) Projecting surface (35) Notch (36) Trimming loss part (37) Projection (B1) (B2) Packaged item (C) Outer box

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 81/06 B65D 5/50 B65D 77/26

Claims (5)

(57) [Claims] 1. A buffer packaging material in which a pair of cushioning materials are opposed to each other to accommodate and hold an article to be packaged therebetween, wherein the cushioning material is a molded article of a synthetic resin foam having appropriate rigidity. A holding member in which a housing recess for housing the article to be packed is formed on the opposed surface; and a synthetic resin foam having a more flexible elasticity than the holding member, and a back side of the housing recess of the holding member. 2. A cushioning packaging material comprising: leg members which are combined in a vertical and horizontal cross shape, and are attached so as to form a projecting shape on each surface continuously from the back surface to the four circumferential side surfaces. 2. A pair of two vertical and horizontal leg members are combined on a back side of the holding member in a cross-girder shape, and both end portions of each leg member are abutted on a side surface of the holding member. The cushioning packaging material according to claim 1, wherein the cushioning packaging material is detachably mounted by a fitting means into a concave groove formed on at least a part of the back surface and the side surface. 3. A holding groove is formed on the rear surface of the holding member, and a groove continuous with the groove is formed on four side surfaces of the holding member.
The buffer package according to claim 2, wherein one of the two leg members is fitted and mounted in the concave groove, and the other two leg members are fitted to the leg member and fitted and mounted in the concave groove. Wood. 4. The cushioning packaging material according to claim 1, wherein said leg member is formed by stamping a predetermined thickness of a flexible and elastic synthetic resin foam. 5. A spacer member, which is made of a synthetic resin foam having a flexible elasticity, and which is fitted into a housing recess of the holding member to form a housing portion of an article to be packaged which is slightly smaller than the housing recess. The cushioning packaging material according to any one of claims 1 to 4, wherein