JPH0565933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for inspecting a floppy (flexible disk) recording medium, and particularly to a method for inspecting a floppy recording medium (flexible disk) having many center cores in a naked state without being stored in a jacket. The present invention relates to a floppy recording medium inspection method in a small floppy recording medium inspection apparatus that continuously inspects floppy recording media (hereinafter referred to simply as floppy media).

[Prior art] As a floppy recording medium inspection device, 51/4
As seen in inspection equipment for 1-inch mini floppies and 8-inch standard floppy disks, floppy media is inspected to determine whether it passes or fails based on predetermined electrical specifications while stored in a jacket. The products are sent out on the same conveyance route as the products,
The separation is generally performed by switching the conveyance path midway through.

On the other hand, the demand for this mini floppy disk is
The number of floppy disks has increased with the expansion of AO technology, and in particular, small floppy disks of 5 1/4 inches and even smaller 3.5 inches called micro floppy disks are rapidly becoming popular in offices and households. As a result, their production has increased rapidly in recent years.

In particular, a small floppy disk of 3.5 inches or less has a center core with an index hole provided therein, and sector 01 is generally determined using this as a rotational reference position. An unstored area is provided in the area of the floppy medium corresponding to this index hole on the circumference.

In conventional inspection methods, unstored areas of floppy media corresponding to index holes are not subject to inspection, but as floppy media become smaller, such unstored areas are The area becomes narrower, and a so-called front face surgical eye is performed to examine this area.

[Problems to be Solved by the Invention] However, in the conventional inspection method, the inspection is completed after going around one track.
It is not possible to perform a complete track inspection. Then, noise rides on such unstored areas, causing memory/distortion.
This may adversely affect the read operation and cause device malfunction.

Therefore, in order to deal with this, we changed the track to 1.
It is also conceivable to perform the inspection by rotating it extra over the circumference +α, without leaving this unstored area. However, the start position of the next track is shifted, and the control becomes complicated when the position needs to be corrected. It is also conceivable to arrange a plurality of heads at different positions and inspect them at the same time, but this also has the problem of complicating the control.

[Purpose of the Invention] This invention has been made in view of the above-mentioned problems, and provides a floppy disk that solves these problems and enables highly accurate inspection of the entire surface of a truck with simple control. The purpose is to provide a recording medium inspection method.

[Means for Solving the Problems] Accordingly, the floppy recording medium inspection method of the present invention which achieves the above object inspects the tracks of the floppy recording medium using the index hole of the center core as a reference, and The track that has been inspected is re-inspected with reference to a position that is shifted from the hole by a predetermined distance greater than the distance corresponding to the uninspected area.

[Operation] In this way, by re-inspecting at a position at a predetermined distance greater than or equal to the distance corresponding to the uninspected area using the index hole as a reference, it is possible to inspect the uninspected area corresponding to the position of the index hole, Moreover, since most of the write/read areas of each track are inspected redundantly, inspection accuracy can be improved.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall schematic diagram of a floppy recording medium inspection apparatus to which the floppy recording medium inspection method of the present invention is applied.

The handling unit 1 handles the supply pallet 2 by controlling its rotation and raising/lowering.
The floppy media 3 stacked (for example, about 200 media) are picked up one by one and transferred to the floppy inspection unit 5, and the floppy media 3 that have been inspected are transferred to the floppy inspection unit 5.
from there to the storage pallet set at the corresponding storage position (in the figure, storage pallet 6
a is set in the storage position).

Here, four storage pallets 6a, 6b, 6
c and 6d are placed on the stacker table 9, and the stacker table 9 has a predetermined amount (90
The selected specific storage pallet is set in the corresponding storage position by controlling the rotation by an integral multiple of 100 degrees. In addition, these storage pallets 6a, 6
b, 6c, and 6d, empty supply pallets 2 are transferred by a pallet transfer and supply mechanism (not shown) composed of a belt conveyance mechanism and set on the stacker table 9.

In addition, four storage pallets 6a, 6b, 6c,
6d corresponds to four states: pass, top side fail, bottom side fail, and double side fail, respectively. In the figure, the storage pallet 6c is in the ejection position.

Now, supply pallet 2 or storage pallet 6a,
6b, 6c, and 6d, as shown in FIGS. 2a and 2b, respectively, the floppy medium 3 is stored with the separator 4 on top, and the floppy medium 3 and the separator 4 are stacked alternately with the separator 4 interposed. Or it is designed to be stored.

Moreover, the inner diameter of the opening 4a of the separator 4 is
It has a diameter larger than the inner diameter of the opening 3a of the floppy medium 3. Further, as shown in FIG. 4, 3c indicated by a dotted line is the index hole of the center core 3d. Although the index hole 3c of the center core is not shown in FIG. 2 below the separator 4, it is provided as a rectangular opening in the periphery of the center core 3d, as shown in FIG. The center core 3d is a concave dish-shaped metal disk mounted on the opening 3a of the floppy medium 3, and has a hole at its center. It protrudes somewhat downward from the surface of the floppy medium 3. Therefore, the center core 3d is located inside the opening 4a of the lower separator 4, and can serve as a separator. Therefore, although the separator 4 does not necessarily need to be used, it is used here for greater safety.

The separator 4 and the floppy medium 3 are both adsorbed under negative pressure by a cylindrical suction head 10 mounted on the handling unit 1 and held at the tip of the suction head 10. Further, as will be described later, the tip of the adsorption head 10 is separated and becomes atmospheric pressure, and the floppy medium 3 is removed from the tip.

By the way, the floppy medium 3 referred to here is a bare floppy disk itself before being stored in a jacket or case.

Now, the handling unit 1 is composed of an arm unit 7 and a transfer control mechanism 8, and the arm unit 7 has three suction heads 10, first, second, and second suction heads that support three suction heads 10 in a loosely fitted state at 120 degree intervals. It has three arms 7a, 7b, and 7c.

On the other hand, the transfer control mechanism 8 moves the arm unit 7 up and down and at a predetermined timing.
This is a mechanism that controls rotation at a rotation angle of 120 degrees.

Here, the floppy inspection unit 5 is a so-called floppy disk drive device, and a spindle 5a of a drive motor is disposed on the upper part of the floppy inspection unit 5. The floppy medium 3 is set on this spindle 5a, and a predetermined electrical Tests are conducted for specific characteristics.

With the above configuration, the arm unit 7
By controlling the rotation every 120 degrees and controlling the raising/lowering, the bare floppy medium 3 along with the separator 4 is continuously picked up from the supply pallet 2, inspected continuously, and transferred to the storage pallet. It will be collected.

Next, a floppy recording medium inspection apparatus compatible with such continuous processing will be explained.

FIG. 3 is a schematic diagram of the head portion for explaining the floppy recording medium inspection method of the present invention, and FIG.
The figure is an explanatory diagram of the inspection state.

Reference numeral 21 denotes a head carriage, and a magnetic head assembly 21a is attached to the front end of the head carriage 21. This head assembly 2
1a is a head support arm 21 arranged above and below.
b, 21c, and on the tip side there are first, second, and third magnetic heads 22, 23, and 24, respectively, corresponding to both sides of the floppy medium 3, three on the top and three on the top, six in total. It is provided.

These first, second, and third magnetic heads 2
2, 23, and 24 are arranged at predetermined intervals so as to scan a total of about 80 to 100 tracks on one side of the floppy medium divided into three parts: the outer periphery, the center part, and the inner periphery. and the first
The first magnetic head 22 is placed on the outer track, the second magnetic head 23 is placed in the center, and the third magnetic head 24 is placed on the outer track.
are in charge of the tracks arranged on the inner periphery, respectively, and perform writing/reading of predetermined information during inspection.

Note that the front magnetic head and the rear magnetic head move to a position where their inspection tracks partially overlap.

Next, the operation will be explained according to Fig. 4.
Based on the center core index hole,
First, second and third magnetic heads 22, 23, 2
Inspect the first track assigned 4,
The head carriage 21 moves forward and inspects each track in turn, and when the inspection of the last track is completed,
The inspection start position is set from the index hole 3c of the center core 3d to the index hole 3c.
The same track is repeatedly re-examined while retracting the head carriage 21, using a position shifted by a predetermined distance L or more corresponding to the unstored area S of the floppy medium corresponding to the floppy medium as a reference.

In this example, one head carriage has three magnetic heads, but it goes without saying that it is also possible to have only one magnetic head. Of course, a plurality of head carriages may be arranged around the floppy medium to be tested.

[Effects of the Invention] As can be understood from the above explanation, the floppy recording medium inspection method of the present invention inspects the tracks of the floppy recording medium using the index hole of the center core as a reference, and detects uninspected tracks from the index hole. Since the inspected track is re-inspected based on a position shifted by a predetermined distance greater than the distance corresponding to the area, it is possible to inspect the uninspected area corresponding to the position of the index hole. Since most of the areas where writing/reading is performed are inspected redundantly, inspection accuracy is improved.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of a floppy recording medium inspection apparatus to which the floppy recording medium inspection method of the present invention is applied, and FIGS. 2a and 2b illustrate the relationship between the storage pallet, floppy medium, and separator, respectively. 3 are schematic diagrams of the head portion for explaining the floppy recording medium inspection method of the present invention, and FIG. 4 is an explanatory diagram of the inspection state. 1 is a handling unit, 2 is a supply pallet, 3 is a floppy recording medium, 4 is a separator,
5 is a floppy test unit, 6a, 6b, 6
7 is a storage pallet, 7 is an arm unit, 7a, 7b, and 7c are first, second, and third arms, respectively, 8 is a transfer control mechanism, 9 is a stacker table, 10 is a suction head, and 21 is a Head carriage 22, 23, 24 are magnetic heads.

Claims (1)

[Claims] 1 Each track on the flexible disk recording medium is inspected based on the position of the index hole of the center core, and when the inspection of the last track is completed, the distance from the position corresponding to the index hole to the uninspected area or more is A flexible disk inspection method characterized in that the re-inspection is carried out from the final track to the start track in the opposite direction to the inspection, using a starting position shifted by a predetermined distance from the final track.