JPS59172111A - Chucking mechanism of rotary disk - Google Patents

Abstract

PURPOSE:To correctly align the axis of a chucking plate with that of a disk receiving table at the time of chucking of a rotary disk, and to prevent the rotary disk from eccentric oscillation by coupling pivotally the central axis of a chucking means and that of the disk receiving table. CONSTITUTION:An annular magnet 29 is fitted into a chucking plate 28 and, at the time of chucking, the magnet 29 is attracted to a receiving table 19c and a head disk 18 is supported between the receiving table 19c and chucking plate 28. Moreover, both of a through hole 23a and the upper end 27a of a chuck hanging shaft are tapered and, when a chuck lever 23 is at the ascending position, the chuck hanging shaft 27 is engaged with the through hole 23a and, when the chuck lever 23 is at the descending position, namely, at the time of chucking, both the hole 23a and shaft 27 are separated from each other. In addition to the above, the lower end 27b of the chuck hanging shaft is conically shaped and a pointed end and is brought into contact with a recessed part 19e having a V- shaped cross section and formed at the upper end of a rotary shaft 19b so as to couple pivotally. Therefore, since the central axis of the chucking means and that of the disk receiving table are always aligned at the time of chucking, any rotary disks do not oscillate eccentrically when the rotary disk rotates.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention is directed to a disk holder (= chuck mechanism seat for holding a rotating disk) on a rotating disk.

(B) Prior Art In general, the VTR manufacturing process 1:2 requires a polishing process in which the head is polished using a polishing tape while the rotating head t head disk (2) is not attached. The head 6ffN device used is
A half-moon-shaped guide cylinder section on which an abrasive tape is mounted and a drum assembly including a pedestal for attaching and detaching a head disk are fixed to each other so that the rotary head protrudes from the gap between the guide cylinder sections.

During polishing, a chuck means is required to fix the head disk to the pedestal.

However, if the chucking means rotates while the axis of the chucking means is misaligned with the axis of the pedestal during chucking, surface image deviation of the head disk occurs, making it impossible to achieve highly accurate head polishing.

(C) Purpose of the Invention This invention μ was developed in view of the above-mentioned points, and when the rotating disk is chucked, the axis of the chuck plate and the axis of the pedestal coincide exactly 4 degrees, causing surface runout. 2. Rotating disk chuck mechanism without it? This is what we provide.

) Composition of the invention Is the invention a rotating disk? It is characterized by comprising a detachable disk pedestal and a chuck means for holding the rotating disk between the disk pedestal, and a central axis of the chuck means is pivotally connected to a central axis of the disk pedestal. This is a rotating disk chuck mechanism.

(E) Embodiments Hereinafter, a ninth embodiment will be described in which the present invention is applied to a head polishing apparatus according to the drawings.

First factor: FIG. 2 is a plan view of the apparatus of this embodiment, FIG. 2 is a side view, FIG. 6 is a sectional view taken along the line AA' in FIG. 1, and FIG. 4 is a perspective view of the main parts.

The supply reel (1) and the take-up reel 121 are loaded with predetermined barley and are placed on the supply reel stand (31 and take-up reel stand +4J), and the P reel stand is placed on the board (5). A polishing tape (6) is mounted between the two reels 1 and 2, and this polishing tape is fed out from the supply reel (1) and passed through the guide roller [71i81, inclined bin (9J,
Upper Fga 4)'&! The rollers run in the order of the rollers (10a) and (10b), the inclined bin (ill), the guide roller 117J, the pinch roller 0, and the capstan (141, and the guide roller 11), and are wound up on the take-up reel [234n].

The upper and lower guide cylinders each have a half-moon shape, and are attached integrally with a predetermined gap between them by a connector (IQ), which will be described later. The lower cylinder (10b) is attached to the mounting surface (
=Fixed, this mounting base is mounted on the board (5).

As shown in FIG. 5C, a tape guide groove (16a) is formed on the inner peripheral surface of the connector σG, and the polishing tape (6) is guided along this guide groove. Therefore, the outer peripheral surface (=) of the upper and lower guide cylinders is a cylindrical surface with no guide means formed thereon.

Next H, M rotation head (18a) (18b) which is a polishing member
)? T-equipped head disk bribe? There are two drum assemblies that are mounted and driven.

The drum assembly 119 is composed of a drive motor (19a), a rotating shaft (19b), and a pedestal (190/219) on which the head disk is placed. A long hole (5a
Mounting device and rotating head (18a) (18b) for mounting head disk +18'2 in ]? It is movable between the polishing position and the polishing position. This ++IIe is slidably supported by a cross a-love-pull Qυ and is driven by an air cylinder (not shown).

Although the details of the LMUe90 roller table are not shown, it is a well-known mechanism that slides the table between 12 plates (two and nine rollers).

Also, punishment & l! On the 7th surface of the board tel, there is the moving table (A).
V-shaped stopper Q whose tip can be engaged at polishing position C=
4 is attached.Next (:, the chuck mechanism for fixing the rotating shaft of the head disk at the polishing position will be explained.

Two guide bins (2) are placed in a WM vertical position on the substrate (5) on the back side of the upper F guide cylinders (10a) (10b).
, This guide bin supports a chuck lever (a chuck lever) having an angular cross-section that allows the upper Fl to slide.

Also, between this chuck lever [with] and the board (5) (
= is fitted with a spring, which constantly urges the tick lever upward. Furthermore, this chuck lever is connected to the air cylinder fixed on the board [5] T' surface C= via the connecting lever ■, and the chuck lever [with] smoked air cylinder +251H is connected in the vertical direction. Driven.

The tip of the chuck lever is provided with a through hole (2i5a) as shown in Figure 6C, into which the chuck hanging shaft □□□ is loosely fitted. (The chuck plate (2) is attached to the chuck plate (2). A circular magnet is fitted into this chuck plate (2). When chucking, this magnet attracts the cradle (190) to the cradle (190). The head disk is held between the chuck plate and the cradle (19c).
19d) (19d) is planted and this is the head disk (C2 between the two engaging slanted pedestals and the head disk, no slipping occurs.

In addition, the upper end (27a
) are each formed with a taper 9, so that when the chuck lever is in the raised position, the through hole C
When the shaft is engaged, it is in the upper position, that is, when it is chucked.
The two are in a separated state.

Furthermore, the F end (27b) of the chuck hanging shaft is pointed in a conical shape, and abuts on a recess (19e) with a V-shaped cross section formed at the upper end of the rotating shaft (19b) for pivot connection.

Also, write down the hanging shaft @ and Chuck Saka (c)
The screw threads are cut on both sides, and the relative distance between them can be adjusted. On the other hand, on the substrate (5) (secondly,
Amaya switch (SWl), start switch (SW2) that starts one cycle of the polishing process described later, polishing M upper 6! Press the stop switch (8W s) to stop the device in any state during the middle of the day or in any state. Moveable toggle switch (SW4)
are arranged.

Next (:, Before using the device of this embodiment (=2) Adjustment of each part will be explained.

First, the jig ci115r as shown in FIG. (Stopper Q1 so that the two moving bases engage)
) and fix it in place. Simultaneous C'' - front and back jig) (two-way drive motor (19a)
0) and fix it. Modification C: Protrusion 1 of the rotating head (18a) (18b) with the jig removed
To:'ll
Ift' is adjusted by 1η. In other words, 5 of the mounting base 1n
The adjusting tool 611 consisting of the fixing part (51a) and the adjusting screw (51b) is brought into contact with the rotating head (19aJ).
(18b) F'/Linda (10b)l Pair of protruding TVs Adjust while viewing with a microscope and set the fixing screw 13 at the optimal position.
21cla lk: Tighten.

After this adjustment path r, upper cylinder (10&), connector 11
e and chuck lever t231%: Retract.

Next (:, the operation of the device of this embodiment will be explained.

First, the polishing tape (6) is mounted on a predetermined path.

Next, place the cradle (19C) in the mounting position (4) in Figure 4.
Attach the head disk USW to.

Then, the source switch (SWl) l:r:ON in Figure 1
When the start switch 'f'' (SV2)=i is pressed, the drum assembly f19 is moved from the air cylinder (not shown) mounting position to the polishing position, and the drum assembly f19 is moved from the position where the air cylinder (not shown) is installed to the polishing position, and the drum assembly f19 is moved from the position where the air cylinder (not shown) is installed to the polishing position, and the drum assembly f19 is moved from the position where the air cylinder (not shown) is installed to the polishing position. When the tip is engaged, it is detected by a microswitch (not shown) (the drive is stopped by pressing the second button).

Continuously, the chuck lever (+731) is tightened by the canier cylinder I251, and the head disk is chucked as shown in FIG. The head disk is driven and rotates at approximately the same speed as a normal VTR.At the same time, the pinch roller presses the capstan [1411:
The take-up reel stand 14) is driven, and the polishing tape 16) runs in a given direction and speed. After polishing in this state for a predetermined period of time, for example, 5 seconds, the rotation direction of the drive motor is changed and the polishing tape 16) is rotated. (Polish for 15 seconds. This polishing percentage: After repeating 8 times, the tape running and the rotation of the drum assembly 19 stop, and the chuck lever Q31 is moved by the air cylinder (c).
rises and chuck 1f2fa and head disk ttS
The zipper is released.

IE+=Drum assembly 11! J [Air cylinder (
(not shown) (2) The polishing position is retracted from the polishing position to the mounting position, and the drive is stopped at the mounting position C2 by detection by a microswitch (not shown).

Then, the polishing is completed, and the fF-head disk (to 1B') is removed from the 9 unit 19. With this, one cycle of the polishing process is completed, and a new unpolished head disk V+ is removed.
Attach it to the stand (11) and press the start switch (SW2).

In the above-mentioned polishing process (2), everything (other than the attachment/detachment of the head disk and the operation of the start switch) is done automatically.

The stop switch (SW5) and toggle switch (SW4) are operated only when a trouble occurs.

(f) Effects of the Invention As described above, the present invention is configured such that the central axis of the chuck means and the central axis of the disk pedestal are pivotally connected. Since these always match, surface runout does not occur when the rotating disk rotates, and highly accurate rotation can be achieved.

Although the above-described embodiment describes a head polishing device that rotates a head disk used in a VTR, the present invention is not limited thereto, and can be used to drive other rotating disks, such as magnetic disks, optical disks, etc. The same effect can be achieved even if the device is used.

[Brief explanation of the drawing]

1 is a top view of the head polishing device, the second is a side view of the same, and FIG. Figure 4 is a perspective view of the main parts, Figure 5 is a perspective view of the connector, Figure 6 is a sectional view of the main parts of the chuck mechanism, Figure 7 is an explanatory diagram showing sub-alignment of the mounting base, and Figure 8 is a diagram of the jig. It is a perspective view. Explanation of main books 118 - Head disk, (19b) Rotating shaft, (19e) Recess, (190) Rest,
...Chuck lever, η...Chuck hanging shaft,
Serving...chuck plate O

Claims (2)

[Claims] (1) A disk holder that allows the rotating disk to be attached and detached;
A chuck mechanism for a rotary disk, comprising: chuck means for holding the rotary disk between the disk pedestal, and a central axis of the chuck means and a central axis of the disk pedestal are pivotally connected. (2) The central axis of the chuck means and/or the disc pedestal is attached to be movable in the axial direction (= movable) with respect to the chuck means and/or the disc pedestal. The chuck mechanism of the rotary disc of the machine.