JPH038029B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-speed rotation support device for a disk such as a floppy disk.

For example, in the process of manufacturing a Frotzbee disk, the surface of the disk is processed while being rotated in the polishing and inspection process of the disk, or an inspection tool is brought into contact with the surface of the disk. When carrying out this work, there is a demand for higher rotational speeds in order to improve work efficiency.

FIG. 1 shows a conventional high-speed rotational support device for a disk, in which a movable rotational shaft 2 is provided so as to be able to move toward and away from the fixed rotational shaft 1 with its axis aligned with the fixed rotational shaft 1.
A floppy disk 3 is clamped and held between opposing end surfaces of rotating shafts 1 and 2. The fixed rotating shaft 1 is provided to the housing 4 by a bearing 4a, and is driven via a belt 7 stretched between a pulley 5 and a pulley 6 of a prime mover. The moving rotation shaft 2 is rotatably and slidably supported by a housing 8, and is moved up and down by a drive lever 9. 1
0 is a working head such as a magnetic head or a polishing roll, and 11 is a pressing mechanism for pressing the disk 3 against the working head 10.

In the above configuration, when the floppy disk 3 is held between the rotating shafts 1 and 2 and rotated at high speed, it is inevitable that the axes of both the shafts 1 and 2 will be slightly misaligned, so that the disk may rotate in an eccentric state. Vibration occurs, which causes defects such as variations in work accuracy, friction between the shaft end surface and the contact surface of the disk, and damage to the bearings in the shaft support.

The present invention has been made by focusing on the above-mentioned drawbacks of the prior art, and includes providing an idle rotation shaft between two rotation shafts that are supported by a housing and moving toward and away from each other, and a disk is held between the two rotation shafts through the idle rotation shaft. This eliminates the misalignment of the axes between the two supported rotary shafts, thereby improving the drawbacks of the prior art described above.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 12 denotes a prime mover, which transmits power to an upper rotating shaft 16 via a pulley 13, a belt 14, and a pulley 15. The upper rotating shaft 16 is provided in the housing 17 via a bearing 17a. A conical engagement protrusion 18 at the lower end of the upper rotating shaft 16
An engaging element 18 having a shape a is provided and urged downward by a spring 19. The prime mover 12 to the housing 17 are provided in another housing 17', and the housing 1 is moved by a pneumatic mechanism (not shown).
By moving 7' up and down, the upper rotating shaft 16 is moved in the axial direction.

The lower rotating shaft 20 is provided in a holder 21 via a bearing 21a, and the holder 21 is moved within the housing 23 via a push-up member 22 by a pneumatic mechanism. A conical engagement protrusion 20a is formed at the upper end of the lower rotating shaft 20.

The upper and lower rotating shafts 16 and 20 are arranged with a gap between them while aligning their axes, and a floating shaft 24 is located between them.
is supported by the frame 25 via the flange portion 24a at the upper end in a state in which it can move slightly within the hole 25a (FIG. 3), and is pushed upward when the lower rotating shaft 20 rises.

The flange portion 24a constitutes a support surface of the disk 26, and an engagement protrusion 24b for supporting the disk center hole is provided at the center of the flange portion 24a.
A conical engagement recess 24c into which the conical engagement protrusion 18a of the engaging element 18 engages is formed at the center of 4b. A lower rotating shaft 20 is attached to the lower end of the floating shaft 24.
A conical engagement recess 24d into which the conical engagement protrusion 20a engages is formed.

27 is a working head, and 28 is a pressing mechanism for pressing the disk 26 against the working head 27.

In the above configuration, the disk 26 is placed on the flange portion 24a of the floating shaft 24 in the state shown in FIG. At the same time, while separating the floating shaft 26 from the pedestal 25, the disk 26 is clamped. In the above configuration, both the upper and lower rotating shafts 16 and 20 are moved, but only one may be moved.

Note that the pedestal 25 is a conveyor for laterally moving the floating shaft 24 on which the disk 26 is mounted around the upper and lower rotational shafts serving as working positions. To carry out the invention more effectively, it is desirable to fix this pedestal to a known conveying member such as a rotary index table, a pallet transfer device, or a conveyor.

FIG. 4 shows an embodiment in this case, in which a plurality of frames 25 are provided in the circumferential direction on a table 30 whose index rotates in the direction of the arrow, index position A is for disk supply, and index position B is for polishing. C is the inspection station, and D is the extraction station.

As described above, in the present invention, a floating shaft is provided between the upper and lower rotating shafts, and the disk is clamped between the floating shaft and one of the upper and lower rotating shafts. The misalignment of the axis of the clamp can be eliminated, and no vibration is generated in the clamp part even during high-speed rotation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional high-speed rotational support device for a disk, FIG. 2 is a sectional view showing a high-speed rotational support device for a disk according to the present invention, and FIG. 3 is a sectional view of the main parts of the same when not clamped. FIG. 4 is a layout diagram of a disk polishing operation. 16, 20...upper and lower rotating shafts, 24... floating shafts.

Claims (1)

[Claims] 1 Provide upper and lower rotating shafts with at least one of them movable in the axial direction and with their axes aligned;
A floating shaft is provided between the lower rotating shafts, and the disk is clamped between the floating shaft and the rotating shaft by engaging with the upper and lower rotating shafts by conical uneven shapes provided at mutually opposing ends. A high-speed rotation support device for disks featuring: