JPH02154382A - Device for sticking hub of information recording medium - Google Patents

Abstract

PURPOSE:To reduce the time required for centering an information recording medium and, at the same time, to automate the transfer of the medium by automatically applying a bonding agent to the information storing medium by means of an applying means and hardening the bonding agent after inserting and centering a centering shaft into and in a hub by means of a centering/hardening means, and then, transferring the medium by means of a transferring means. CONSTITUTION:An applying means 3 automatically applies a bonding agent to an information storing medium 13 and a hub supplying means 9 supplies a hub 18 to the medium 13 which is near the means 3 and to which the bonding agent is applied. Then a centering/hardening means 33 finds the center of recording grooves of the medium 13 by reading the recording grooves by means of plural reading device provided in the vicinity of the means 9. After finding the center, the means 33 moves the medium 13 so that the center of the recording grooves can be brought to a reference position and inserts and centers a centering shaft provided at the reference position into and in the center hole of the hub 18. Then the means 33 hardens the bonding agent. In addition, transferring means 4 transfers the medium 13 to the means 9 and 33. Therefore, the bonding applying work can be automated and the time required for centering the medium can be reduced. Moreover, the transfer of the information storing medium can be automated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a hub bonding device for an information storage medium that concentrically bonds a hub to an information storage medium such as an optical disk, for example.

(Prior Art) When the center of rotation of an optical disc and the recording groove of the optical disc are eccentric, a tracking error may occur when recording and reproducing information.

Recently, in order to prevent this tracking error, the boss of the hub is fitted into the through hole provided in the center of the optical disc.
The center of the insertion hole provided in this hub is made to coincide with the center of the recording groove.

By the way, the above hub was glued by applying adhesive manually, bonding it to an optical disk set in a special jig, and then curing the adhesive with an ultraviolet irradiation device. .

In addition, the centering of the hub can be determined by the fitting accuracy determined by the molding accuracy of the optical disc and the hub, or by reading the recording groove of the optical disc using a recognition device using a camera and determining its center. It was determined by aligning the center of the hub with the center.

(WJ problem to be solved by the invention) However, in the past, since the adhesive was applied by hand, the adhesive strength of the hub was influenced by variations in the amount of application, reducing reliability.

In addition, when centering is performed by fitting the optical disk and hub due to molding accuracy, the standard value of eccentricity of 251 or less is extremely strict in terms of accuracy, and the accuracy is affected by variations due to molding loft and stub bar loft. Furthermore, in the case of a recognition device that uses a camera, there is a problem in that the processing time becomes long because reading is performed with one camera.

Further, since the supply of the hub to the optical disk and furthermore the supply of the hub to the centering/curing section was carried out by a worker, there were problems in that it was time-consuming and caused quality defects due to handling.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic hub bonding device that automates the application of adhesive, shortens the centering processing time, and automates the transfer of information storage media. be.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention includes a coating means for automatically applying an adhesive to an information storage medium, and an adhesive provided near the coating means. A hub supplying means for supplying a hub to an information storage medium coated with the agent, and a plurality of reading devices provided near the hub supplying means to read the recording groove of the information storage medium to determine the center of the recording groove. , the information storage medium is moved so that the center of the recording groove coincides with the reference position, and the centering shaft provided at the reference position is inserted into the center hole of the hub for centering, and adhesive is applied. a centering/hardening means for curing the information storage medium; a transport means for transporting the information storage medium from the coating means to the hub supply means; and from the hub supply means to the centering/hardening means. It is something to do.

(Function) By providing an adhesive application means, adhesive application can be automated and the applied amount can be quantified. Also, by providing a hub supply means, hub supply can be automated, and furthermore, multiple reading devices can be used. By providing a stand, the centering process can be sped up, and by providing a means for transporting the information storage medium, it is possible to save the labor of the operator and reduce the occurrence of quality defects due to handling.

(Example) The present invention will be described below with reference to an example shown in the drawings.

FIG. 1 shows a hub bonding device for an optical disk 13 as an information storage medium, and numeral 1 in the figure is an adhesive application station. A turntable 2 is rotatably provided in the adhesive application station 1, and a dispenser 3 as an adhesive application means is provided above the turntable 2.

Further, in the vicinity of the adhesive application station 1, a transfer device 4 is provided as a transfer means. This transfer device 4 includes a swing arm 5 and a jig 12. Inside this jig 12, as shown in FIG. 4, a backup means 22 is provided.

This backup means 22 includes a slider 24 having a tapered surface 23 on its upper surface, and this slider 24 is operated by an air cylinder 25.

A backup 26 is provided on the tapered surface 23 of the slider 24.
is placed on the slider 24, and this backup 26 is placed on the slider 24.
It moves up and down by moving forward and backward.

Further, the jig 12 is provided on a centering XY table II, and is adapted to be moved from the transfer station 6 to the hub supply station 7. In the vicinity of the hub supply station 7, a front-back reversing unit 8 for reversing the front and back sides of the hubs 18 is provided, and a hub supply unit 9 is provided as a hub supply means for sucking and supplying the hubs 18 in the normal orientation. ing. This hub supply unit 9 is provided with a rotary actuator 10, and can rotate the attracted hub 18 while pressing it against the optical disk 13.

Further, as shown in FIG. 4, first and second detectors 31 and 32 are arranged at this hub supply station 7,
The first detector 31 detects the hub 18 already pasted on the top surface of the optical disc 13, and the second detector 32 detects the hub 18 already pasted on the bottom surface of the optical disc 13.
8 is now detected. The detection by the second detector 32 determines whether to raise the backup 26 built in the jig 12 or leave it as it is;
It is designed to be used as a signal for completion of double-sided pasting (volume count).

Also, near the hub supply station 7, there is a centering/
A curing station 33 is provided, and the centering XY table 11 is moved to this centering/curing station 33.

The centering XY table 11 is movable in the horizontal direction in the drawing and in the direction perpendicular to the plane of the paper. This centering XY table 11 is provided with the jig 12 described above. This jig 12 has an optical disk 1 as a base.
3 is placed, and this optical disk 13 is attracted to the jig 12 by a vacuum device (not shown) provided on the jig 12, and in this state, it is moved by the centering X-Y table 11. There is.

Further, in this centering station 33, a CCD camera 14 as a reading device is located above the jig 12 and faces the optical disk 13 adsorbed on the jig 12.
is provided. These CCD cameras 14...
As shown in FIG. 5, a plurality of CCD cameras, for example four cameras, are arranged at equal intervals around the periphery of the optical disc 13, and these CCD cameras 14... Among the grooves, the recording groove 13a located on the outer periphery of the optical disc 13 is read, as shown in FIG. A read signal output from each CCD camera 14 is supplied to a control circuit 15. This control circuit 15 controls the recording groove 13 of the optical disc 13 based on the input read signal.
The centering X-Y table 11 is moved by a drive means (not shown) so that the center of a coincides with the predetermined centers (reference positions) of the four CCD cameras 14. That is, the centering XY table 11 is moved so that the recording grooves 13b on the outer periphery of the optical disk 13 are at the same position within the field of view of each CCD camera 14, for example.

On the other hand, at the center of the four CCD cameras 14...
A holder 16 is provided. This holding body 16 is controlled by the control means 15 and a driving means (not shown) to control the jig 1.
It is said that it is movable in the direction toward and away from 2. A centering shaft 17 is provided at the distal end of the holder 16, and is inserted into a hub 18 attached to the optical disc 13 at the distal end of the centering shaft 17.

Furthermore, a presser glass 19 is provided at the center of the centering shaft 17 in the axial direction. This holding glass 19 fixes the hub 18 to the first disk 13 in a state where the hub 18 is centered with respect to the optical disk 13, and is made of a material that transmits ultraviolet rays. Tips of optical fibers 20 are disposed at four locations around the holding glass 19, for example. These optical fibers 2° guide ultraviolet rays and pass through the holding glass 19 to the hub 1.
8 and the optical disk 13 is cured.

FIG. 6 shows the relationship between the optical disk 13 and the hub 18.

A through hole 13c is provided in the center of the optical disc 13. Further, the centering shaft 17 is inserted into the hub 18,
An insertion hole 17a having approximately the same diameter as the centering shaft 17 is provided, and a boss 18b is provided at Illrm of the insertion hole 18. The diameter D1 of the boss 18b is slightly smaller than the diameter D2 of the through hole 13c of the optical disc 13, and the hub 18 is movable relative to the through hole 13c of the optical disc 13. Further, this hub 18 is also made of a material that transmits ultraviolet rays. Furthermore, a photocurable adhesive 21 is applied between the optical disk 13 and the hub 18.

Note that in supplying the hub 18, the hub 18 is
As shown in the figure, when a plurality of shafts of the magazine 28 are stocked, and one shaft has no hub 18, it is indexed to the next column by the index table. hub 18
If all the magazines are used up, the magazine can be replaced in units.

Next, a method of bonding the hub 18 will be explained. First, the optical disc 13 is set in the adhesive application station 1, and a start button (not shown) is pressed. This results in
Automatic operation is started, and at the adhesive application station 1, as shown in FIG. 2, the dispenser 3 is moved to a normal position, and the turntable 2 is rotated at a constant speed.

Then, when the turntable 2 comes to a predetermined position, the application starts, and ends after exactly one rotation, and as shown in FIG. is applied.

In this way, when the coating is completed, the optical disk 13 is transferred to the jig 12 by the transfer device 4, and the jig 12 is moved from the transfer station 6 to the hub supply station 7, and the centering X-Y table A positioning mechanism utilizing the movement of the optical disk 11 presses and positions the optical disk 13 against a reference bin (not shown) of the jig 12 with spring pressure.

At this time, in the hub supply station 7, the front and back sides of the hub 18 have already been determined by the front and back reversing unit 8, and the hub 18 in the normal orientation is sucked by the hub supply unit 9, and the optical disk 18 is
Supply to 3. When the supply of the hub 18 is completed, the jig 12
If the hub supply station 7 detects that the hub 18 is on the back side of the optical disk 13, the backup 26 remains lowered, and if it is not detected, the hub 18 is moved to the centering station 33. The backup 26 is raised by the height of the brim of the hub 18 to back up the hub 18.

Thereafter, the recording groove 13b on the peripheral edge of the optical disk 13 is read by the four CCD cameras 14, and the centering X-Y table 11 is moved according to the read output, so that the center of the recording groove 13b is aligned with the four cameras. It is aligned with the center of the CCD camera 14.

Next, the holder 16 is lowered, and the tip of the centering shaft 17 is inserted into the insertion hole 18a of the hub 18, as shown in FIG.

At this time, since the tip of the centering shaft 17 is tapered, the axis of the centering shaft 17 and the insertion hole 18g of the hub 18
If the center of the centering shaft 17 is misaligned, as the centering shaft 17 is inserted into the insertion hole 18a of the hub 18, the hub 18 moves to the center of the recording groove 13a of the optical disc 13, and the centering shaft 17 is completely inserted, and the hub 18 is moved to the center position, and the presser glass 19 presses and holds that position.

After positioning the hub 18 as described above, the ultraviolet rays guided by the optical fiber 20 are
When the photocurable adhesive 21 is irradiated through the beam 9, the adhesive 21 is cured and the hub 18 is fixed to the optical disk 13.

Thereafter, the hub 18 is attached to the back surface of the optical disc 13 in the same manner as described above.

As described above, since the adhesive 21 is automatically supplied to the optical disk 13 by the dispenser 3, the amount of the adhesive 21 applied can be quantified, and sufficient adhesive strength can be obtained.

In addition, since centering is performed using the CCDECCD camera 14, centering accuracy can be improved compared to the conventional case where centering is performed by fitting the optical disk and the hub.
Since a plurality of (four) CCD cameras 14 are used, the centering processing time can also be shortened.

Furthermore, the transfer device 4 transfers the hub 18 from the adhesive application slag 1 to the hub supply station 7, and
To centering station 33! [To move the target,
As in the past, when it was moved manually by a worker,
It does not take much time and also reduces the occurrence of quality defects due to handling.

In the above embodiments, an optical disk is used as the information storage medium, but the present invention is not limited to this (for example, the present invention can also be applied to a floppy disk, etc.).

It goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, according to the present invention, since the adhesive is automatically applied to the information storage medium by the adhesive application means, the amount of adhesive applied can be quantified and sufficient Adhesive strength can be obtained.

Furthermore, since a plurality of reading devices are used, the centering processing time can be shortened.

Furthermore, since the information storage medium is provided with a means for transporting the information storage medium, it is possible to save the labor of the operator and also to reduce the occurrence of quality defects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing a hub contact 6 device for an optical disk, FIG. 4 is a block diagram showing a hub detection device and a backup device, FIG. 5 is a schematic block diagram showing a hub centering/curing device, and FIG. 6 is a diagram showing the relationship between the optical disk and the hub. 7 is a plan view showing the relationship between the optical disk and the camera, and FIG. 8 is an explanatory diagram showing the centering operation of the hub. 3... Dispenser (adhesive application means), 4... Transfer device (transfer means), 13... Optical disk (information storage medium), 9... Hub supply unit (hub supply means), 13b. ... Recording groove, 13c... Center hole, 17.
... Centering shaft, 18... Hub, 33... Centering/hardening means. Applicant's agent Patent attorney Takehiko Suzue M 1 Figure 3 Figure 3 Figure 3

Claims (1)

[Claims] an application means for automatically applying adhesive to an information storage medium;
A hub supplying means for supplying a hub to the information storage medium coated with adhesive is provided near the application means, and a plurality of reading devices are provided near the hub supplying means to read recording grooves of the information storage medium. The center of the recording groove is determined by reading, and the information storage medium is moved so that the center of the recording groove coincides with a reference position, and the centering shaft provided at the reference position is inserted into the center hole of the hub. centering/curing means for centering the adhesive and curing the adhesive; and automatically transporting the information storage medium from the coating means to the hub supply means, and from the hub supply means to the centering/curing means. What is claimed is: 1. A hub adhesion device for information storage media, comprising: a transfer means for adhering information storage media;