JPS61278078A - Driving device for disk type recording medium - Google Patents

Abstract

PURPOSE:To write a signal to a position which coincides strictly with a prescribed write position on both disk surfaces, by constituting the titled device so that the whole spindle part is inverted. CONSTITUTION:A sensor 12 is allowed to contact with a revolving shaft 8 by moving an X table 10b and a carriage 10c, the X direction position Dx1 of the carriage 10c is stored in a position detecting circuit 16, and by making a sensor 13 contact, a Y direction position DY1 is stored. A spingle part 5 is inverted by rotating a revolving shaft 3 by an actuator 17, and the positions DX2, DY2 of the carriage 10c are stored. A disk 7 is installed to the spindle part 5, a head 11 is positioned at a prescribed feed position A, and a signal for generating a reference disk is written to a prescribed write position on a disk surface by moving the carriage 10c. The spingle part 5 is inverted, a position shifted from the position A by a difference between DX2 and DX1, and a difference between DY2 and DY1 is set as the feed position of the head 11, and a prescribed write is executed onto the surface of the turned disk 7.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for writing a necessary signal to a predetermined writing position on a disk-type recording medium, and particularly to a device for writing a necessary signal to a position that exactly coincides with the predetermined writing position. It relates to something that can write signals.

[Conventional technology]

Due to its nature, the reference disk used for the production of the floppy disk I/live device has predetermined signals written on both disk surfaces at positions that exactly correspond to each predetermined writing position. required to be present. To create such a reference disk, for a 5-inch or 8-inch floppy disk, a read/write head writes signals to one disk surface of the disk that is attached to the spindle and driven to rotate. Thereafter, the disk was turned over, mounted on a spindle, and driven to rotate, thereby writing signals to the other disk surface using the same head. On the other hand, 3.5-inch floppy disks have a chucking hub attached to the disk itself and cannot normally be installed upside down.
Writing can be done in the same way as a 5-inch or 8-inch disk by using a chucking adapter that allows it to be mounted upside down, or by providing separate heads for each disk surface. Therefore, either a method has been adopted in which writing is performed on each disk surface using separate heads while the disk is mounted on a spindle portion according to the chucking direction.

[Problem that the invention seeks to solve]

However, when the disk is attached to the spindle through an adapter, chucking accuracy deteriorates and eccentricity often occurs between the rotation of the spindle and the rotation of the disk. Furthermore, when separate heads are used, work is required to ensure compatibility between both heads, and compatibility may not be fully guaranteed in some cases. For this reason, 3
．． Regarding 5-inch floppy disks, it is difficult to write signals on both disk surfaces at positions that exactly match the predetermined writing positions, and therefore it is difficult to create a reliable reference disk. There was a problem.

Although undisclosed at the time of filing of the present invention, as a disk type recording medium drive device to solve such problems, by reversing the entire spindle part, the 3.5 inch floppy disk can be moved according to the chucking direction. The one that allows signals to be written to both disk surfaces using the same read/write head while attached to the spin 1 ankle.
A patent application has already been filed by the applicant. That is, this drive device includes a rotating shaft for reversing, which is supported by a fixed frame in a position perpendicular to the rotating shaft of the spindle section, and
A spindle support part having one end attached to the reversing rotating shaft and rotating together with the reversing shaft and supporting a spindle part at the other end, and a reversing drive means for imparting rotational motion to the reversing rotating shaft. By rotating the reversing shaft and rotating the entire spindle unit with the disk mounted 180 degrees around the reversing shaft (that is, reversing it), the disc can be changed before and after reversing. The disks are turned upside down with respect to the read/write heel l', so that signals can be written to both disk surfaces using the same read/write head while the disk is attached to the spindle. be.

By the way, in this method of inverting the entire spindle part, the position of the spindle part is reversed on a plane perpendicular to the rotation axis ζ of the spindle part (that is, on a plane parallel to the disk surface of the disk mounted thereon). If there is a discrepancy between the front and after the reversal, there will be a discrepancy in the position of the disk on the plane before and after the reversal, so the same feeding position (i.e., reference position) before and after the reversal will occur. Even if you extend the read/write head from the
It is impossible to write a signal at a position that exactly corresponds to a predetermined writing position.

That is, in such a system, the accuracy of the reversing mechanism consisting of the reversing rotating shaft, spindle support, etc. directly affects the accuracy of the signal writing position. Therefore, in this type of system, it is required to use a highly accurate reversing mechanism, but in reality, the accuracy of the reversing mechanism may be affected due to problems with the machining accuracy of parts or wear of parts during use. There is a limit to this, and as a result, there are many cases in which the position of the spindle portion deviates as described above.

Therefore, even if such a disk-type recording medium drive device is used, a highly reliable reference disk for a 3.5-inch floppy disk cannot be created in some cases.

This invention was made in view of the above-mentioned points, and relates to a disk having a structure in which a chucking hub is attached to the disk itself, such as a 3.5-inch floppy disk. It is an object of the present invention to provide a drive device for a disk-type recording medium that allows signals to be written in exactly coincident positions.

[Means for solving problems]

A disk-type recording medium drive device according to the present invention employs a method of inverting the entire spindle portion as described above, in which the spindle portion is rotated on a plane perpendicular to the rotation axis of the spindle portion. The present invention is characterized in that a spindle part position measuring means 4 is provided for determining position information at least before and after the spindle part is reversed.

[Effect]

The spindle position measuring means determines position information of the spindle before the reversal and position information of the spindle after the reversal, respectively. This makes it possible to detect all the positional deviations of the spindle portion before and after reversal, and to perform necessary control in response to this deviation in the disk type recording medium drive device. - For example, the read/write head payout position (reference position) before the spindle part is reversed and the read/write head payout position (reference position) after the spindle part is reversed based on these position information. By setting these values, it is possible to correct the extended position of the read/write head in accordance with the misalignment of the spindle portion. This makes it possible to write a signal at a position that exactly coincides with a predetermined write position on both disk surfaces of the disk loaded therein, regardless of the positional deviation of the spindle.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an apparatus employing an embodiment of a disk-type recording medium drive device according to the present invention. This IT is used to create a reference disk for adjusting the read/write head when manufacturing a floppy disk drive device, for a 3.5-inch floppy disk with a structure in which the chucking hub is attached to the disk itself. It is.

In this device, a frame 2 is fixedly provided on a base 1, and the frame 2 is oriented horizontally (in the direction of arrow H in the figure) and has both ends protruding from the frame 2 for rotation for reversing. A shaft 6 is supported.

One end of an abbreviated spindle support portion 4 is fixedly attached to the reversing rotation shaft B. The spindle support portion 4 rotates together with the reversing rotation shaft 6 around the rotation shaft 6. It rotates around the rotation shaft 6 for reversal together with the tip 4 of the spindle support part 4 (and therefore together with the rotation shaft 6 for reversal). A floppy disk 7 consisting of the aforementioned 3.5-inch floppy disk is attached to this spindle section 5 in a removable manner, and other parts of the spindle section 50 are attached to a frame 6 and are fully supported by the support section 4. There is.

The spindle support part 4 supports the spindle part 5 in such a manner that the extension line of the rotation shaft 8 of the spindle part 5 supported at its tip is perpendicular to the extension line of the rotation shaft B for reversal. From the position shown in Fig. 1, move the rotation shaft 6 for reversal by
When rotated once, the spindle portion 5 is turned over to the position shown in FIG. 3 with the disk 7 still mounted thereon. The center of rotation of the rotating shaft B and the height of the disk 7 in the spindle portion 5 in FIG. The disk 7 is inverted about the axis, and although the disk 7 is located in the same space before and after the inversion, only the disk surface is inverted.

An example of a driving means for rotating the rotation shaft 6 for reversal is shown in FIG. 2. The frame 2 is provided with a rotating shaft oriented horizontally in the same way as the rotating shaft 6 for reversing, and on the same side as the end of the rotating shaft 6 for reversing on which the spindle support part 4 is not attached. A rotary actuator 17 is provided with one end protruding from the rotary actuator 17 . Boots IJ-'1' 8 and 1' 9 are attached to the end of the reversing rotating shaft B and the end of the rotary actuator 17, respectively, and the pulleys 18 and 19 are connected by a belt 20. As a result, rotary actuator 1
When 7 rotates, pulley 18, belt 20, boo
The rotation shaft 3 for reversal rotates via J'-19.

Incidentally, in FIG. 1, illustrations of the rotary actuator 1 and belt 20 are omitted.

On the base 1, an XY table 10 is provided on the side of the spindle section 5. The XY table 1D includes an X table 10b that moves on the Y table IDa in the direction of the arrow Y in FIG.
A carriage 10c (including z) that moves in the direction of
2 and 13 are supported. The XY table 10 serves to move the head 11 and sensors 12, 13 in the X direction and Y direction in FIG. 2, respectively. The position of the carriage 10C in the X direction and the Y direction is measured by the length measuring device 14.

The read/write head 11 sends a reference disk creation signal given from a signal generator (not shown) to the spindle unit 5.
This is for writing onto the disk 7 attached to the computer.

The sensors 12 and 13 each have a predetermined confidence %S when they come into contact with an object.
1 and 82, and the height of each is set to be the same as the height of the disk 7 mounted on the spindle section 5 in the state shown in FIG. sensor 12,1
3, when the disk 7 is not mounted on the spindle section 5, comes into contact with the rotating shaft 8 of the spindle section 5 and outputs the signal 8.
1. It plays a role in S2Q generation. This sensor 12,1
As shown in FIG. 2, a spring 15 is installed between the contact point 3 and the carriage 10° for cushioning when there is contact.

Signals 81. generated from sensors 12, 13. S2 is applied to the control human power C of the position detection circuit 16.

The position detection circuit 16 is sequentially supplied with data 1) y indicating the position of the carriage 10C in the X direction and data y indicating the position in the X and Y directions from the length measuring device 14. The position detection circuit 16 detects when the sensor 12 comes into contact with the rotating shaft 8 of the spindle part 50 and the signal S1 is applied to the control human power C.
The seek Dx (that is, data indicating the current position of the carriage 10C in the X direction) given from the length measuring device 14 is taken in and stored. Furthermore, when the sensor 13 comes into contact with the rotation shaft 8 of the spindle section 50 and the signal S2 is given to the control human power C, the position detection circuit 16 detects the data Dy given from the length measuring device 14 (i.e., the carriage IOC).
(data indicating the current position in the Y direction) and stores it.

An example of the operation of creating a reference disc using this apparatus is as follows. When the spindle support part 4 is in the position shown in FIG. 1 and the disk 7 is not yet attached to the spindle part 5, move the X table so that the sensor 12 is located on the extension line of the rotation center of the rotation axis B for reversal. 1
0b on the Y table 108, and then move the carriage 10C on the X table 10b,
As shown in FIG. 4, the sensor 12 is brought into contact with the rotating shaft 8 of the spindle section 5. Then, the signal S from the sensor 12
1 is generated and the signal S1 is given to the control human power C of the position detection circuit 16, so that the carriage 10C when the sensor 12 contacts the rotating shaft 8 of the spindle section 5 before reversal.
Data DXI indicating the position of in the X direction is stored in the position detection circuit 16. Next, by positioning the sensor 16 on a line that is perpendicular to the extension line of the rotation center of the reversing rotating shaft B and passing through the rotating shaft 8 of the spindle section 5, the spindle section is moved as shown in FIG. The sensor 16 is brought into contact with the rotating shaft 8 of 5. Then, a signal S2 is generated from the sensor 13, and this signal S2 is applied to the control human power C of the position detection circuit 16. Data DY1 indicating the position in the direction is
It is stored in the position detection circuit 16.

Subsequently, by moving the X table 10b and the carriage 10C, the head 11 and the sensor 12 . ,．．
13 is separated from the spindle part 5, the rotary actuator 17 is driven to rotate the rotation axis 6 for reversal by 180°.
By rotating it, as shown in Figure 3 (however, the third
(Unlike the figure, the disk 7 is not yet attached to the spindle section 5 at this time)) The spindle section 5 is reversed.

Then, by moving the X table 10b and the carriage 1[)C again, the sensors 12 and 13 are brought into contact with the rotation shaft 8 of the spindle part 50 in the same manner as shown in FIGS. Carriage I when the sensors 12 and 13 come into contact with the rotating shaft 8 of the spindle section 50 afterward
Data D indicating the position of OC in the X direction and Y direction
x□1DY2 are respectively stored in the position detection circuit 16.

Next, for example, after returning the spindle section 5 to the state before inversion as shown in FIG. 1, the disk 7 is mounted on the spindle section 5 in the chucking direction. Then, by moving the X table 10b and the carriage sum C, the head 11 is positioned at a predetermined feeding position (reference position) A, and then by moving the carriage 10C, the sixth
As shown in the figure, one disk surface of the disk 7 is caused to seek by the head 11, and a signal for creating a reference disk is written by the head 11 at a predetermined writing position on the disk surface.

Subsequently, after the disk 7 is mounted, the spindle portion 5 is turned over as shown in FIG. 3 in the same manner as described above. Next, by moving the X table 10b and the carriage IOC, the data I)
Data 1) deviated from the position A in the X direction by the difference △Dx between 2 and DX□ and also stored in the position detection circuit 16
A position A' that is shifted from the position A in the Y direction ζ by the difference ΔDy between Y2 and I) y l is set as the feeding position (reference position) of the head 11. Then, by moving the carriage 1 [IC from this position A/, the head 11 seeks the remaining disk surface of the turned over disk 7, and the head 11 moves the head 11 to a predetermined writing position on the disk surface for creating a reference disk. Write the signal.

Here, the sensor 1 is attached to the rotating shaft 8 of the spindle section 5 before reversal.
Seek T)

The difference between DY□ and take DX21DY2, which indicates the position of the carriage IOC in the X direction and Y direction when the sensors 12 and 13 come into contact with the rotating shaft 8 of the spindle section 5 after reversal, △Dx, △Dy are nothing but the deviations in the position of the spindle section 5 in the X direction and the Y direction before and after the reversal, respectively. Later in the X direction,
They are nothing but those that respectively indicate positional deviations in the Y direction.

Therefore, by correcting the feeding position of the head 11 after the spindle part 5 is reversed with respect to the feeding position of the head 11 before the spindle part 5 is reversed by the amount of this deviation, the deviation in the position of the spindle part can be corrected. It is possible to write signals on both surfaces of the disc 7 at positions that exactly match the predetermined writing positions regardless of the difference, and it is possible to create a highly reliable reference disc based on this.

In this embodiment, a 3.5-inch floppy disk having a structure in which a chucking hub is attached to the disk itself is shown as an example, but the drive device according to the present invention can of course be applied to other disk-type recording media. It may also be applied.

In addition, in this embodiment, the drive device according to the present invention is employed in the device for creating the reference disk, but other appropriate devices (in particular, the drive device for generating this signal at a position exactly coincident with a predetermined writing position) This drive device k may be used in applications that require writing, applications where head compatibility is an issue, etc.).

〔Effect of the invention〕

As described above, since the drive device for a disk-type recording medium according to the present invention has a winding system in which the entire spindle section is reversed, the disk-type recording medium remains attached to the spindle section (here, the same Signals can be written to each disk surface by the read/write head.In addition, the positional information of the spindle on a plane perpendicular to the axis of rotation of the spindle is obtained before and after reversal, so It is possible to perform control according to the positional deviation of the spindle after reversal (for example, the reference position of the read/write head can be corrected according to this deviation), and thereby the position of the spindle can be adjusted. It is possible to write a signal at a position that exactly coincides with a predetermined write position on both disk surfaces of a disk-type recording medium loaded therein, regardless of the misalignment.

Therefore, even for a disk-type recording medium such as a 3.5-inch floppy disk in which a chucking hub is attached to the disk itself, a signal is placed at a position exactly corresponding to each predetermined writing position on both disk surfaces. based on which a highly reliable reference disc can be created.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a disk-type recording medium drive device according to the present invention, FIG. 2 is a top view of the same embodiment, and FIG. 3 is a state in which the spindle portion of the embodiment is reversed. 4 and 5 are top views showing the state in which the sensor is in contact with the rotating shaft of the spindle in the same embodiment, and FIG. 6 is a side view showing the floppy disk mounted on the spindle in the same embodiment. FIG. 3 is a top view showing a state in which a read/write head is writing a signal onto a disk. DESCRIPTION OF SYMBOLS 1... Base, 2... Frame, 6... Rotating shaft for reversal, 4... Spindle support part, 5... Spindle part, 6... Frame, 7... Floppy disk , 8
... Rotation axis, 9... Morph, 10... XY table, 10a... Y table, 10b... X table, 10C... Carriage, 11... Reading/writing head, 12, 13 ．． ,, sensor, 14... length measuring device, 15
...Spring, 16...Position detection circuit, 17...
・Rotary actuator, 18.19...Boo IJ
-120...Belt. Applicant Hitachi Electronics Engineering Co., Ltd. Agent
Yoshi Iizuka Hitoshi 3 M Figure 5/'ad v -=4 Figure 6

Claims (1)

[Scope of Claims] 1. A spindle part for removably mounting a disc-shaped recording medium and rotationally driving the disc-shaped recording medium, and a fixed frame arranged perpendicular to the rotational axis of the spindle part. a rotating shaft for reversing, which is supported by a rotating shaft; a spindle support part having one end attached to the rotating shaft for reversing and rotating together with the rotating shaft, and supporting the spindle part at the other end; and a reversing drive means for applying a rotational motion to the reversing rotation axis in order to perform the reversal around the reversing rotation axis; and information regarding the position of the spindle portion on a plane perpendicular to the rotation axis of the spindle portion. 1. A drive device for a disk-type recording medium, comprising: a spindle portion position measuring means for determining at least the position of the spindle portion before and after reversal. 2. The disk type according to claim 1, wherein the spindle position measuring means uses position information of the spindle before and after reversal to set a reference position of the read/write head. of recording media,
Drive device. 3. The spindle position measuring means includes a sensor that generates a predetermined signal when it comes into contact with an object, and supports the sensor;
A conveyance drive means for conveying the sensor onto a plane perpendicular to the rotation axis of the spindle part to bring the sensor into contact with the spindle part, and a position of the conveyance drive means on the plane perpendicular to the rotation axis of the spindle part. Claim 1 or 2 includes a length measuring device for measuring, and a storage means for storing measurement data of the length measuring device on the condition that the signal is generated from the sensor. drive device for disk-type recording media. 4. The spindle section is for mounting a floppy disk having a structure in which a chucking hub is attached to the disk itself, and this drive device is used to adjust the magnetic head when manufacturing a floppy disk drive device. A disk-type recording device according to claim 1, 2, or 3, which is used in a device for writing signals necessary for use as a reference disk on both surfaces of the floppy disk. Media drive.