JPH04294775A - Structure for packing magnetic discs - Google Patents

Abstract

PURPOSE:To make it easy to transport and store and to hold them without warp without damaging magnetic layers by a method wherein a stack of magnetic discs is sandwiched by a pair of protection plates, and side surfaces of the stack are packed with a heat-shrinkable film together with the protection plates. CONSTITUTION:A stock 4 of a plurality of magnetic discs 3 is sandwiched by a pair of protection plates 2 and 5, and at least side surfaces of the stack 4 are packed by a heat-shrinkable film 8 together with at least peripheries of the protection plates 2 and 5. Thus, as the magnetic disc stack 4 is packed so firmly in an unloosening structure that the magnetic discs 3 are protected from mutual frictions and magnetic layers are also protected from damage due to actions from outside. If the stack 4 is subjected to aging in the packed state, as they are fixed firmly by the pair of protection plates 2 and 5, the magnetic discs 3 can be held without warp. As a result, it becomes easy to house and take out the magnetic discs 3 in and from a continer for treatment.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging structure for magnetic disks.

0002

2. Description of the Related Art During the manufacturing process of a magnetic disk, typically a flexible disk, a magnetic layer is coated on both sides of a non-magnetic support, and the dried material is punched out into the shape of a donut with a hole in the center. The formed magnetic disk is heat-treated (aged) at a temperature of about 60° C., and is housed in a jacket to become a product.

Conventionally, the above-mentioned magnetic disk was disclosed in Japanese Patent Application Laid-Open No. 61
180982 and is stored in a container 1 as shown in FIG. 5 and sent to the next process together with the container, or a storage container 21 with a plastic lid 20 as shown in FIGS. 13 and 14. It was packed and shipped with cushioning material.

However, when transporting using a container such as the one described above, although a cushioning material is used, it is difficult to completely secure the magnetic disk 4, and vibrations during transport may cause scratches or damage to the disk. There were problems such as distortion and dust (also generated from the cushioning material) adhesion. Furthermore, containers of this type are slippery and difficult to stack, making them inconvenient to handle, and it takes time and effort to accumulate, store, and return empty containers.

[0005]

OBJECTS OF THE INVENTION An object of the present invention is to provide a packaging structure suitable for transporting magnetic disk stacks.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a laminate in which a plurality of single magnetic disks are stacked and sandwiched between a pair of protective plates, so that at least one side surface of the laminate is at least around the periphery of the protective plate. The present invention relates to a magnetic disk packaging structure characterized in that the magnetic disk is packaged together with a heat shrinkable film.

[0007] The magnetic disk package having the packaging structure of the present invention has a magnetic disk laminate fixed with a pair of protection plates and tightly wrapped with a heat-shrinkable film, so that the magnetic disks do not shift from each other. The magnetic layer will not be damaged by rubbing against each other or by external action.

In addition, when aging is performed with the packaging structure of the present invention intact, since it is firmly fixed by a pair of protection plates, a magnetic disk support as described in Japanese Patent Laid-Open No. 63-241777 is used. Since distortion caused by uneven stretching of the body or sagging due to gravity does not occur, a magnetic disk with good flatness can be held. Moreover, there is no need to transfer the product to a storage container after aging, and it can be shipped as is, which is convenient.

Furthermore, since only a heat-shrinkable film is present on the outer periphery of the magnetic disk laminate in the packaging structure of the present invention, unlike the storage container described above, the magnetic disk laminate can be stored in the container during processing or assembly. Or it can be easily taken out from inside the container.

The magnetic disk according to the present invention is one in which a magnetic layer containing magnetic powder is provided on both or one side of a support punched out in the shape of a donut.
．． There are 5-inch, 5-inch, and 8-inch flexible disks, and electronic still video floppies.

Magnetic disks punched into donut shapes are stacked in a container covered with a protective plate. There is no particular limit to the number of magnetic disks that can be stacked at one time, but
For example, it would be convenient to put a protective plate between every 1,000 sheets. Of course, it is possible to package the product after using two protective plates (top and bottom), or, as mentioned above, insert a protective plate between every 1,000 sheets, so that the total number of sheets is 10,000, for example.
When there are only 1 sheets left, the final protective plate may be placed and wrapped.

If necessary, a cylindrical sleeve as shown in FIG. 8 can be installed in the center hole of the magnetic disk in order to prevent dust or protect the center hole of the magnetic disk during transportation and storage. In this case, the sleeve may be installed before or after the magnetic disks are stacked.

The sleeve preferably has an outer diameter that is 0 to 2 mm smaller than the center hole of the magnetic disk.

[0014] The protective plate according to the present invention is a disc-shaped flat plate or has an axis at the center thereof, and it is preferable that the disc portion has approximately the same outer diameter as the magnetic disk to be packaged. Furthermore, if the clamping member used is one that is fixed using the center hole of the magnetic disk, the protective plate itself must also have a center hole.

[0015] The protective plate may be made of any material, but it must be able to withstand the force exerted when it is fixed by the clamping member. Such protective plates include, for example, plastic plates made of vinyl chloride, acrylic, styrene, phenol resin, or so-called engineering plastics; metal plates made of aluminum, stainless steel, or steel treated with anti-corrosion treatment. . Furthermore, wooden boards, ceramic boards, etc. can also be used. Note that the above-mentioned plastics and metals can also be used as the material of the sleeve.

[0016] When using a plastic plate as a protective plate or sleeve, it should be treated with antistatic treatment, for example by mixing a conductive material such as aluminum powder or applying antistatic paint. This is preferable in terms of preventing dust and the like.

[0017] In order to obtain the strong packaging structure of the present invention, it is preferable to wrap the magnetic disk stack with a heat shrink film while fixing the magnetic disk laminate and two protection plates placed at both ends thereof using a clamping member.

There are no particular restrictions on the holding member, but when fixing using the center hole of the magnetic disk, bolts and nuts with washers, thumbscrews, coil springs, etc. as shown in FIG. 3 may be used. is preferred. Also, Figure 10
As shown in the figure, a shaft with an outer diameter 0 to 2 mm smaller than the inner diameter of the disk is provided at the center of the lower protection plate, and after stacking the magnetic disk on this shaft-equipped protection plate, the shaft has an outer diameter of 0 to 2 mm smaller than the outer diameter of the shaft. It is also preferable to hold the upper end with a protective plate having a 2 mm larger center hole and to fix it by inserting a pin into a through hole previously provided above the shaft. This case is convenient because there is no need to remove the clamping member after packaging with the heat-shrinkable film.

There is also a method of fixing the protective plate from the outer periphery using, for example, a mantis shrimp vise, without using the center hole of the magnetic disk.

The heat-shrinkable film used in the present invention is not particularly limited, but films made of polymeric materials such as vinyl chloride, polypropylene, and polyethylene are preferable. These heat-shrinkable films can form a strong packaging structure by wrapping the magnetic disk fixed by the above-mentioned clamping member together with a protective plate and passing it through a heat-shrinking tunnel at a specific temperature.

If the clamping member utilizes the center hole of the magnetic disk, the entire magnetic disk cannot be covered with a heat-shrinkable film, so if the clamping member is removed after packaging, the center hole will be left open. In this case, it is desirable to cover the upper and lower open holes with labels or the like to prevent dust and the like. however,
When using a sleeve as shown in FIG. 8 or a protective plate with a shaft as shown in FIG. 10, dust and the like will not enter, so there is no need to attach a label or the like.

When the clamping member is used from the outer periphery of the magnetic disk, it is possible to close the center hole with a heat-shrinkable film.

The packaging structure of the present invention is based on a previous application (Japanese Patent Application No. 6, 1983) in which a plurality of magnetic tape reels (pancakes) in which magnetic tape is wound using a core material are laminated and packaged with a heat shrink film.
2-289732). Since the packaging structure of the present invention does not require the use of a core material, the stacked magnetic disks are in close contact with each other. Therefore, it can easily withstand heat during aging or shrinkage treatment of the heat-shrinkable film, and is less likely to be damaged during storage and transportation.

[0024]

[Examples] Examples of the present invention will be described below. Example 1 FIGS. 1 to 6 are diagrams explaining Example 1. First, Figure 5
A protective plate 2 (an acrylic plate in which Al powder has been soaked) having a center hole is placed on the bottom of the container body 1 shown in the figure, and a punched magnetic disk 3 is stacked thereon. When the number of magnetic disks reaches 1,000, the stacking is stopped, and a protective plate 5 (having the same composition as 2) having a center hole is placed on top of the magnetic disk stack 4, as shown in FIG. Next, the bolt 6 is passed through the center hole through the washer and tightened with the nut 7 through the washer.

[0025] The magnetic disk laminate with the protective plate secured with the bolts and nuts described above is taken out of the container, covered with a heat shrink film, and passed through a heat shrink tunnel. The packaging structure at this stage is shown in FIG. Further, an exploded perspective view at the same stage is shown in FIG. 4 (however, in this figure, the heat-shrinkable film 8 has not yet shrunk).

Next, as shown in FIG. 1, the above-mentioned bolts and nuts are removed, and a label 10 is attached to the center hole of the upper and lower protection plates, thereby completing the packaging structure. In addition, Figure 2
is an exploded perspective view of the packaging structure of this example. According to this example,
Since the label is attached to the center hole of the protective plate, dust does not get in, and the product number can be written on the label, which is convenient.

Embodiment 2 FIGS. 7 to 9 are diagrams for explaining Embodiment 2. After magnetic disks are stacked in a container covered with a protective plate as in Example 1, a cylindrical sleeve 11 shown in FIG. 9 is inserted into the center hole of the stack. This was wrapped in a heat shrinkable film in the same manner as in Example 1, and the bolts and nuts were removed to obtain the packaging structure of this example. Note that FIG. 8 is an exploded perspective view of the packaging structure of this example. According to this example, since it has a sleeve, it can withstand dust or impact from the outside, so transportation and storage are convenient.

Embodiment 3 FIGS. 10 to 12 are diagrams for explaining Embodiment 3. A protective plate 12 with a shaft is placed in a container similar to that used in Example 1, and a magnetic disk is stacked thereon. After the lamination is completed, the upper protection plate 5 is placed, and the upper and lower protection plates are fixed to the magnetic disk using pins 13. Next, this is taken out from the container and wrapped with a heat-shrinkable film to form the packaging structure shown in FIG. 10. Note that FIG. 11 is a top view of the packaging structure of this example, and FIG. 12 is an exploded view. According to this example,
Operability is improved because there is no need to use clamping members such as bolts and nuts.

Example 4 As a modification of Example 1, a good packaging structure was obtained by carrying out the same operations as in Example 1 except that the material of the protective plate was Al.

Example 5 Magnetic disk stack (number of disks: 1,
000 pieces) through a round rod with threaded ends, one side of which was secured with a nut and a protective plate passed through it, and a protective plate was also inserted on the other side. Next to this protective plate, a magnetic disk stack (1,000 disks) is passed through, and another protective plate is inserted. Repeat the above operation and remove the magnetic disk 1,0
A laminate of 10,000 sheets in total, with a protective plate for every 10,000 sheets, is prepared. A protective plate is also passed through the terminal end and tightened with a nut, and this is wrapped in heat shrink film. The resulting packaging structure is approximately 1 m long, and is easier to store and transport than a packaging structure of 1,000 sheets.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a labeled packaging structure.

FIG. 2 is an exploded perspective view of the labeled packaging structure.

FIG. 3 is a sectional view of the packaging structure before bolts and nuts are removed.

FIG. 4 is an exploded perspective view of the packaging structure before processing the heat shrink film.

FIG. 5 is a sectional view showing the insertion of a magnetic disk into a container.

FIG. 6 is a sectional view showing fixation with bolts and nuts within the container.

FIG. 7 is a sectional view of a packaging structure with a sleeve.

FIG. 8 is an exploded perspective view of the packaging structure with a sleeve.

FIG. 9 is a sectional view of the packaging structure with a sleeve before bolts and nuts are removed.

FIG. 10 is a sectional view of a packaging structure using a shafted protection plate.

FIG. 11 is a plan view from above of a packaging structure using a shafted protection plate.

FIG. 12 is an exploded sectional view of a packaging structure using a protection plate with a shaft.

FIG. 13 is an exploded sectional view showing a state in which a magnetic disk stack is stored in a conventional storage container with a lid.

FIG. 14 is a sectional view showing a state in which a magnetic disk stack is stored in a conventional storage container with a lid.

[Explanation of symbols]

1 Container body 2, 5 Protective plate 3 Single magnetic disk 4 Magnetic disk stack 6 bolts 7 Nut 8 Heat shrink film 9 Open hole 10 Label 11 Cylindrical sleeve 12 Protective plate with shaft 13 Pin 20 Plastic lid 21 Storage container

Claims (6)

[Claims] 1. A laminate formed by stacking a plurality of individual magnetic disks is sandwiched between a pair of protective plates, and at least the side surface of the laminate is wrapped with a heat shrink film together with at least the peripheral portion of the protective plate. A magnetic disk packaging structure characterized by: 2. The magnetic disk packaging structure according to claim 1, wherein the pair of protection plates have the same outer diameter as the magnetic disk. 3. The magnetic disk packaging structure according to claim 1, wherein the pair of protection plates are made of metal or charged plastic. 4. A laminate formed by stacking a plurality of single magnetic disks is sandwiched between a pair of protection plates by a holding member, and at least the side surface of the laminate is heat-shrinked together with at least the peripheral portion of the protection plates. A magnetic disk packaging structure characterized in that the magnetic disk is packaged with a film and an opening left behind after the holding member is removed is covered with a label. 5. A laminate formed by stacking a plurality of single magnetic disks, the center hole of the laminate having a sleeve having an outer diameter 0 to 2 mm smaller than the inner diameter of the center hole of the magnetic disk, and . A magnetic disk packaging structure, wherein at least a side surface of the laminate is wrapped with a heat-shrinkable film together with at least a peripheral portion of the protective plates while being sandwiched between two or more protective plates. 6. A stacked body formed by stacking a plurality of single magnetic disks has a diameter smaller than the inner diameter of the center hole of the magnetic disk.
It is sandwiched between a protection plate having a shaft having an outer diameter that is ~2 mm smaller in the center and a center hole having an inner diameter that is 0 to 2 mm larger than the outer diameter of the shaft, and the shaft passes through the center hole of the protection plate. While the laminate is held by inserting a pin into a through hole provided at the tip of the protruding shaft, at least the side surface of the laminate is wrapped with a heat shrink film along with at least the peripheral portion of each protection plate. A magnetic disk packaging structure characterized by: