JPS6240421A - Disk rotating device - Google Patents

Abstract

PURPOSE:To improve accuracy of rotation of a disk by attaching a block that acts as a supporting medium of a disk to the disk and attaching a flange attached to a rotation shaft to the block. CONSTITUTION:A cup-shaped flange 12 attached to a rotation shaft 11 by means of screwing or pressing in etc. is a circular peripheral end face 17 or plural circular arc-shaped peripheral end faces 19 divided by grooves 18. The peripheral end face 17 and each peripheral end face 19 are formed to faces to right angles to the center of rotation of the rotation shaft 11 after attaching the flange 12 to the rotation shaft 12. On the other hand, a metallic block 14 housed in the flange 12 is bonded to a glass disk 13 with solder 15 for glass-metal. When the block 14 is attached to the flange 12 with plural small screws, the lower face of the disk 13 to which the block 14 is attached comes into contact with the peripheral end face 17 or 19. Accordingly the disk 13 rotates without oscillation.

Description

[Detailed Description of the Invention] [1 Already Required] A device for rotating a disk, which has a structure in which a block serving as a support medium for the disk is attached to the disk, and a flange attached to a rotating shaft is attached to the block. This improves the rotational accuracy of the disc (reduces surface runout).

[Industrial application field]

TECHNICAL FIELD The present invention relates to a rotating device for rotating a rotating disk, and particularly to a configuration for improving the rotation accuracy of the disk.

In recent years, in-store information collection (point
of 5ales (hereinafter referred to as POS) systems, laser scanners (barcode scanners) using hologram disks have come to be widely used.

In the past, barcode leagues of POS systems that optically read barcodes displayed on products generally used a combination of a rotating polygon mirror and a lens.

When attempting to adapt the conventional barcode league to the generation of complex scanning patterns in practical use, the optical system became extremely complex and the polygon mirror required high precision. Increase in size. In addition, since the beam convergence position of the scanning pattern is determined by the scanning lens,
It has been almost impossible to optimally adjust the desired beam convergence position for each scanning line.

Therefore, a hologram scanner that uses a hologram disk that also serves as an optical deflector and a lens has appeared, and this scanner is capable of generating complex scanning patterns with a simple optical system, and has the characteristic of having a deep harmonic [reading depth]. This eliminated the drawbacks of the polygon mirror system 1 and played a major role in its widespread use.

[Conventional technology]

FIG. 5 is a side view showing a main part of a conventional configuration of a disk rotating device in the hologram scanner.

In FIG. 5, a flange 2 is provided on the motor rotation shaft 1,
An optical disk 4 is bonded to the upper surface of the flange 2 via a glass-metal solder 3, and when the rotating shaft 1 is rotated in a predetermined direction at a predetermined rotation speed, the optical disk 4 is attached to the rotating shaft 1.
rotates with.

After the optical disk 4 is bonded to the flange 2, the dynamic balance during rotation is adjusted, and in such a device, the optical disk 4, which is rotated at a high speed of about 3000 rpm or more, must be prepared to prevent damage during rotation. Based on this consideration, a solid disk 4 is used, and in order to avoid forming a mounting hole in the disk 4 when attaching it to the flange 2, it is constructed as shown in FIG. 5, and glass-metal solder 3 is used. Was.

[Problem that the invention seeks to solve]

However, in a disk rotation device using glass-metal solder, it is necessary to strictly limit the surface runout of the disk for applications that require high performance.

That is, if the thickness of the solder 3 becomes uneven as shown in FIG. 6, surface runout will occur in the disk 4. Therefore, conventionally, the disk 4 is soldered to the flange 2 while measuring and correcting the surface runout.

Alternatively, before attaching the flange 2 to the rotating shaft 1, the flange 2 and the disk 4 are soldered, and the disk 4 is
The flange 2 was attached to the rotating shaft 1 to prevent surface runout.

Therefore, there is a problem in that the work to eliminate the surface runout of the disk 4 requires a high degree of skill, and the surface runout accuracy varies.

[Means for solving problems]

FIG. 1 is a side view showing the main parts of a disk rotation device according to a first embodiment of the present invention, in which 11 is a motor rotation shaft;
2 is a flange attached to the rotating shaft 11, 13 is an optical disk, 14 is a block, and 15 is glass-metal solder.

According to FIG. 1, the above problem is caused by the following problems: the rotating disk support medium block 14 attached to the center of the rotating disk 13, the cup-shaped flange 12 attached to the rotating shaft 11, and the flange 12 and block 14. Further, the flange 12 is cup-shaped with a circumferential end surface perpendicular to the rotation center of the rotating shaft 11, and the block 14 attachment surface of the rotating disk 13 is The block 14 and the flange 12 are attached with their peripheral end surfaces in contact with the block 14 and the flange 12, the opposing surfaces of the block 14 and the flange 12 are spherical with approximately the same radius, and the rotating disk 13 is made of glass. It's been a long time since I've been in the middle of a long time since I've been in the middle of a long time since I've been in the middle of a long time,
is made of metal, glass rotating disk 13 and metal pro,
The present invention is solved by a disk rotating device characterized in that the above-mentioned attachment to the glass-to-metal solder 15 is adhesive.

[Effect]

According to the above means, the flange 12 is attached to the rotating shaft 11, and the block 14 is attached to the rotating disk 13,
Next, by attaching the flange 12 and the prong 14, the disk 13 is rotatably supported.

Therefore, if the disk 13 rotates, it can be eliminated or easily eliminated due to the shapes of the flange 12 and block 14. That is, by forming the peripheral end surface of the cup-shaped flange 12 to be orthogonal to the rotation center of the rotating shaft 11, it is possible to eliminate the rotational runout of the disk 13 without any adjustment, and the rotation of the block 14 and the flange 12 is By forming the opposing surfaces into spherical shapes with substantially the same radius, the rotational runout of the disk 13 can be easily adjusted.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk rotation device according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 16 is a small screw for attaching the block 14 to the flange 12, and the cup-shaped flange 12 is attached to the rotating shaft 11 by screwing or press-fitting.
As shown in Figure 3 ((), (II), the circular peripheral end surface 1
7, or a plurality of circular arc-shaped circumferential end surfaces 1 divided by grooves 18
9, and the peripheral end surface 17 and each peripheral end surface 19 are the flange 1
2 is attached to the rotating shaft 11, and is formed on a surface perpendicular to the center of rotation of the rotating shaft 11.

On the other hand, a metal block 14 accommodated in the flange 12
is bonded to the glass disk 13 using a commercially available glass-to-metal solder 15, and when the block 14 is attached to the flange 12 with a plurality of machine screws 16, the disk 13 with the block 14 attached is attached. Since the lower surface contacts the peripheral end surface 17 or 19 of the flange 12, the disk 13 rotates without wobbling.

FIG. 2 is a side view showing the main parts of a disk rotation device according to a second embodiment of the invention, and FIG. 4 is a side view showing the main parts of a disk rotation device according to a third embodiment of the invention. [jl1
This is a side view, and in each figure, the same reference numerals are used for parts common to the previous figure.

In FIG. 2, the flange 20 made of metal has a shape that eliminates the hole for passing the machine screw 16 of the flange 12, and the block 14 bonded to the glass disk 13 with glass-metal solder 15 is attached to the disk 13. The bottom surface of is flange 2
The flange 20 is bonded to the flange 20 with metal-to-metal solder 21 in a state where it is bent so as to come into contact with the peripheral end surface 17 or 19 of 0.

That is, the second embodiment uses solder 21 in place of the machine screw 16 of the first embodiment, and obtains the same effect as the first embodiment.

In FIG. 4, 22 is a hemispherical metal block;
Reference numeral 23 denotes a flange having a concave surface having a spherical shape substantially the same as that of the block 22, and the block 22 is bonded to the glass disk 13 with glass-metal solder 15.

On the other hand, the flange 23 is attached to the tip of the rotating shaft 11 by means such as screwing or press-fitting, and the adhesion between the block 22 and the flange 23 with the metal-to-metal solder 21 is performed on the disk 1.
3 and the block 22, and attach the flange 2 to the rotating shaft 11.
This will be carried out after completing step 3. At this time, since the opposing surfaces of the block 22 and the flange 23 are spherical, it is extremely easy to adjust the disc 13 to be perpendicular to the center of rotation of the rotating shaft 11, and this adjustment corrects the surface runout of the disc 13. be done.

〔Effect of the invention〕

As explained above, according to the present invention, the surface runout of the rotating disk can be eliminated without any adjustment, or can be adjusted very easily. As a result, the assembly of the disk rotating device is facilitated, and the dynamic accuracy is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the main parts of a disk rotation device according to the first embodiment of the present invention, FIG. 2 is a side view showing the main parts of the disk rotation device according to the second embodiment of the invention, FIG. 3 is a perspective view showing an example of the configuration of a flange used in the device of the present invention, FIG. 4 is a side view showing the main parts of a disk rotating device according to a third embodiment of the present invention, and FIG. 5 is a disk FIG. 6 is a side view showing an example of a conventional configuration of main parts of a rotating device; FIG. 6 is a side view illustrating problems with the conventional device; FIG. In the figure, 11 is a rotating shaft, 12 is a cup-shaped flange, 13 is a rotating disk, 14.22 is a block for a rotating disk support medium, 15 is a glass-metal solder, and ! 6.19.23 is the peripheral end surface of the flange, 21 is metal-to-metal solder, multi-1n' hanging Z bolt (a)
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Claims (4)

[Claims] (1) A rotating disk support medium block (14) attached to the center of the rotating disk (13) and a rotating shaft (11)
1. A disk rotating device comprising: a cup-shaped flange (12) attached to the block; and means for attaching the flange (12) to the block (14). (2) The flange (12) is cup-shaped with a circumferential end surface perpendicular to the rotation center of the rotating shaft (11), and the flange (12) is cup-shaped with a circumferential end surface perpendicular to the rotation center of the rotating shaft (11). 2. The disk rotating device according to claim 1, wherein the block (14) and the flange (12) are attached with their end surfaces abutting each other. (3) The disk rotating device according to claim 1, wherein the opposing surfaces of the block (14) and the flange (12) are spherical with substantially the same radius. (4) The rotating disk (13) is made of glass, the block (14) is made of metal, and the attachment between the glass rotating disk (13) and the metal block (14) is glass-metal. The disk rotating device according to claim 1, characterized in that the adhesive is bonded using solder (15).