JP4917052B2 - Optical disc polishing apparatus and operation method thereof - Google Patents

Description

The present invention relates to an optical disc polishing apparatus for removing dirt and wrinkles on the surface of an optical disc (CD, DVD, CD-R, DVD-R, and the like) and an operating method thereof.

If the surface layer on the transparent side that covers the data recording part of the CD or DVD is wrinkled, it cannot be reproduced, but since data is not recorded on the surface layer, it can be reproduced by polishing this surface layer. Become. As such a polishing apparatus, for example, a polishing apparatus described in Patent Document 1 is known, and an optical disk is placed on a turntable that is rotatably installed without having a direct drive source, and an upper part thereof. A polishing material (that is, a polishing grindstone) is placed eccentrically and brought into contact with this, and the optical disk is rotated by friction with the optical disk by driving the polishing material to rotate. Then, the abrasive is moved in the horizontal direction, or a large-diameter abrasive is fixedly arranged to polish the optical disk.
In recent years, along with the widespread use of optical discs, the number of optical discs with poor reproduction has increased, and automatic polishing apparatuses that can polish in a short time and can improve the polishing accuracy without human labor are expected. .

International Publication No. 97/032691

However, in the apparatus described in Patent Document 1, since only one type of abrasive is attached to the polishing apparatus at a time, it is necessary to replace the abrasive according to the size or depth of the wrinkles on the surface of the optical disk, for example. There was a problem that workability was poor and work time could not be shortened.
In addition, in order to improve workability, an automatic polishing machine equipped with both an abrasive and a buff for surface finishing has a large area of the abrasive that comes in contact with the surface layer of the optical disk, and the size of the buff is polished. Unless it was made smaller than the material, both the abrasive and the buff could not be brought into contact with the surface layer of the optical disk. In this way, when a small buff is used, for example, the buff deterioration rate is increased, and abrasive particles remaining on the surface of the optical disk cannot be efficiently absorbed by the buff. For this reason, when performing surface finishing with a buff, the deterioration of the buff or residual abrasive particles may cause wrinkles on the surface of the optical disk, resulting in a decrease in the surface finishing accuracy of the optical disk, and the mirror surface state cannot be achieved. There was also.
Although it is conceivable that the automatic polishing apparatus is provided with a cleaning means to wash off the remaining abrasive particles and the like, there is also a problem that the apparatus configuration of the automatic polishing apparatus becomes complicated.

And since a large polishing motor is attached to the abrasive placed on the top of the optical disc, the weight of the abrasive, including the polishing motor, increases, making it difficult to have a precise lifting mechanism, and the finish There was a problem that accuracy was inferior.
Furthermore, in order to improve the polishing efficiency, the automatic polishing equipment with multiple abrasives cannot be equipped with a high torque motor due to the weight limit considering the transportability, and the problem is that the equipment is inferior in automation and mass polishing. was there.

The present invention has been made in view of such circumstances, and provides an optical disc polishing apparatus and an operation method thereof that can improve the finishing accuracy of an optical disc as compared with the conventional art, can automate the polishing apparatus, and can polish a large amount of optical discs. Make it the purpose.

An optical disc polishing apparatus according to the present invention that meets the above-described object includes a lower case and an upper case that is pivotally connected to the lower case via a hinge, and is disposed in a horizontal state on the upper portion of the lower case. An optical disc turntable that is driven to rotate and places an optical disc on top is projected and arranged .
Wherein the lower portion of the upper case, eccentric respectively the optical disc turntable and two abrasive respectively disposed at different positions turntable and buff the turntable is projected arranged, resting on the optical disc turntable The surface layer covering the data recording portion of the optical disk is removed by an abrasive attached to the abrasive turntable, and the surface layer from which the defect is removed is surface-finished by a buff attached to the buff turntable. In the optical disc polishing apparatus
Each of the abrasive turntable and the buff turntable has a width that completely covers the entire radial direction of the data recording portion of the optical disc,
The two abrasive turntables are detachably mounted with rough and fine abrasives, and the two buff turntables are removable with rough finish and mirror finish buffs, respectively. Installed and
The diameter of each abrasive turntable is 60 mm or more and less than 70 mm, the diameter of the buff turntable used for rough finishing is 70 mm or more and less than 80 mm, and the diameter of the buff turntable used for mirror finishing is 80 mm or more and 100 mm or less. The outer diameter of the buff turntable used for finishing is larger than the outer diameter of the abrasive turntable and the outer diameter of the buff turntable used for rough finishing.

In the optical disk polishing apparatus according to the present invention, wherein the lower case, the light is the main motor is arranged to the disc turntable is driven to rotate, the said upper case, said abrasive turntable and the buff turntable, each of said optical disk A small motor that rotationally drives in a direction opposite to the rotation direction of the turntable and a lifting unit that includes a small reduction motor and moves the small motor up and down together with the abrasive turntable and the buff turntable are housed. It is preferable.

In the optical disc polishing apparatus according to the present invention, the polishing pressure of the abrasive is measured by the current value of the main motor or the small motor, and the abrasive lowered by the elevating means is applied to the optical disc placed on the optical disc turntable. It is preferable to detect contact and that the abrasive is polishing the optical disk placed on the optical disk turntable.
In the optical disk polishing apparatus according to the present invention, the polishing pressure of the buff is measured by the current value of the main motor or the small motor, and the buff lowered by the elevating means comes into contact with the optical disk mounted on the optical disk turntable. It is preferable to detect that the buff is polishing the optical disk placed on the optical disk turntable.

In the optical disk polishing apparatus according to the first to fourth aspects of the present invention, since the outer diameter of the buff turntable is larger than the outer diameter of the abrasive turntable, the area where the buff turntable contacts the polishing surface of the optical disk is widened. For example, abrasive particles remaining on the optical disk surface can be efficiently absorbed into the buff. Furthermore, the deterioration rate of the buff due to use can be made slower than the case where the outer diameter of the buff turntable is equal to or less than the outer diameter of the abrasive turntable. As a result, the surface finishing accuracy of the optical disk can be improved as compared with the prior art, and the surface of the optical disk can be in a mirror state.
In particular, the optical disc polishing apparatus of the present invention makes the diameter of the buff turntable to which the mirror-finish buff is attached larger than the diameter of the buff turntable to which the rough finish buff is attached. The particles can be more efficiently absorbed by the mirror finish buff, and the surface finish accuracy of the optical disc is further improved.

The optical disk polishing apparatus of the present invention has two polishing material turntables, each of which has a roughing and fine polishing material detachably attached, two buff turntables, rough finishing and mirror finishing buffing. Since each is detachably attached, for example, depending on the depth and size of the wrinkles on the surface layer covering the optical disk, the surface layer is sequentially polished by each abrasive and each buff, thereby automating the work. This makes it possible to shorten the work time.

And, it has a lower case and an upper case, and the optical disc turntable, abrasive turntable, and buff turntable are housed in this, so that the device configuration can be made compact and the transportability of the optical disc polishing apparatus is good. Become.
The optical disk polishing apparatus according to claim 2 uses a small motor as a power source for rotationally driving the abrasive turntable and the buff turntable. Therefore, a mechanism for rotationally driving the abrasive and the buff and a mechanism for raising and lowering are provided. Can be downsized. Although the optical disc turntable is rotated by the main motor, the abrasive turntable and the buff turntable are also rotated by a small motor as an auxiliary, so that the abrasive wear and buff are unevenly worn, and the abrasive and buff turn. Can alleviate the impact when the lens contacts the optical disk.

The optical disk polishing apparatus according to claim 3, wherein the polishing pressure of the abrasive is measured by the current value of the small motor, the abrasive lowered by the elevating means is brought into contact with the optical disk mounted on the optical disk turntable, and the abrasive is Since it is detected that the optical disk mounted on the optical disk turntable is being polished, the polishing operation can be automated.
The optical disk polishing apparatus according to claim 4 , wherein the buffing pressure is measured by the current value of the small motor, the buff lowered by the elevating means comes into contact with the optical disk mounted on the optical disk turntable, and the buff is Since it is detected that the optical disk mounted on the table is being polished, the polishing operation can be automated.
Domestic manufacturers adjust the polishing pressure with spring pressure. However, since it is difficult to adjust the polishing pressure with the spring, the polishing amount is adjusted by the polishing time.
On the other hand, in the present invention, since the polishing pressure is adjusted while observing the current value of the DC motor, the polishing pressure is optimized, the polishing time can be greatly shortened, and the power consumption is also reduced.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
1 is a perspective view of an optical disk polishing apparatus according to an embodiment of the present invention, FIG. 2 is a partially omitted front sectional view of the optical disk polishing apparatus, and FIG. 3 is a plan sectional view of the optical disk polishing apparatus. 4 is an explanatory view showing the positional relationship between each polishing material turntable and each buff turntable with respect to the optical disk placed on the optical disk turntable of the optical disk polishing apparatus, FIG. 5 is an electric circuit block diagram of the optical disk polishing apparatus, and FIG. It is an operation | movement flowchart of an optical disk grinding | polishing apparatus.

As shown in FIGS. 1 to 5, an optical disc polishing apparatus 10 according to an embodiment of the present invention includes a lower case 12 and an upper case (lid) 13 that are connected to each other by a plurality of hinges 11 so as to be opened and closed. The lower case 12 is provided with an optical disk rotation drive mechanism 16 having an optical disk turntable 15 on which the optical disk 14 is placed. The upper case 13 has a surface layer (transparent part) of the optical disk 14 placed on the optical disk turntable 15. The first and second polishing mechanisms 17 and 18 for removing the surface and the third and fourth polishing mechanisms 19 and 20 for finishing the surface of the optical disk 14 from which the wrinkles have been removed are provided. Reference numeral 21 denotes a telescopic stopper, and 22 and 23 denote a pair of locking mechanisms. These will be described in detail below.

The optical disk rotation drive mechanism 16 is connected to a main motor 24 of 12 to 150 w (preferably lower limit is 25 w) directly attached to the lower case 12, and an output shaft 25 of the main motor 24. It has an optical disc turntable 15 protruding from the upper part of the case 12. In addition, the optical disk turntable 15 protruding from the upper part of the lower case 12 means that the optical disk turntable 15 protrudes from the ceiling surface of the lower case 12.

The diameter of the optical disc turntable 15 in the horizontal state is larger than the diameter of the optical disc 14 in the range of 2 to 10 mm, and has a guide 27 into which the central hole of the optical disc 14 is fitted at the center. A disk presser 28 that is fitted to the guide 27 is attached to the guide 27 by screws or fitting.
The main motor 24 is an induction motor, and drives the optical disc turntable 15 at a high rotational speed of 1000 to 3600 rpm, for example. A synthetic resin or rubber sheet 29 is attached to the upper surface of the optical disc turntable 15 so that the surface of the optical disc 14 is not easily wrinkled and the optical disc 14 is difficult to slip.

The first to fourth polishing mechanisms 17 to 20 have substantially the same structure, and are attached to the upper case 13 at different positions via a support member 30 and another support member (not shown). .
The first and second polishing mechanisms 17 and 18 are arranged so as to protrude below the upper case 13 and are used in a horizontal state in the use state, respectively, and the abrasive turntables 31 and 32, the abrasive turntable 31, 2 to 24 w small motors 33 and 34 (preferably a direct current motor) for rotating and driving 32, and elevating means 35 and 36 for moving the small motors 33 and 34 together with the respective abrasive turntables 31 and 32. . Each of the abrasive turntables 31 and 32 protrudes below the upper case 13, and a gap is formed between each of the abrasive turntables 31 and 32 and the upper case 13. Exposed.

The same applies to the third and fourth polishing mechanisms 19 and 20, and the buff turntables 37 and 38 arranged in a protruding state at the lower part of the upper case 13 and arranged in the horizontal state in use, respectively. There are 2 to 24 w small motors 39 and 40 (preferably a direct current motor) to be rotationally driven, and elevating means 41 and 42 for moving the small motors 39 and 40 together with the buff turntables 37 and 38, respectively. The buff turntables 37 and 38 are also arranged so as to protrude below the upper case 13 like the abrasive turntables 31 and 32, and a gap is formed between the buff turntables 37 and 38 and the upper case 13. Thus, it is exposed below the upper case 13.
As described above, the optical disc polishing apparatus 10 according to the present embodiment has the two abrasive turntables 31 and 32 and the two buff turntables 37 and 38.

Each of the abrasive turntables 31 and 32 and each of the buff turntables 37 and 38 are arranged eccentrically with respect to the optical disc turntable 15 when viewed in plan.
The diameters (outer diameters) d1 and d2 of the abrasive turntables 31 and 32 and the diameters (outer diameters) d3 and d4 of the buff turntables 37 and 38 are data of the optical disk 14 mounted on the optical disk turntable 15, respectively. It has a width that completely covers the entire area 43 in the radial direction of the recording unit, and is smaller than the diameter (outer diameter) of the optical disk 14. Note that the area of the data recording portion is an area formed in the circumferential direction around the rotation center P of the optical disk 14 in the entire radial direction indicated by numeral 43 in FIG.
In particular, the buff turntables 37 and 38 perform surface finishing of the surface layer covering the data recording portion of the optical disc 14, and therefore the diameters d3 and d4 of the buff turntables 37 and 38 are set to the respective abrasive turntables. The diameters d1 and d2 of 31 and 32 are, for example, more than 1.0 times and 1.7 times or less (preferably 1.1 times or more and 1.5 times or less).

Specifically, the diameters d1 and d2 of the abrasive turntables 31 and 32 are 60 mm or more and less than 70 mm (here 66 mm), and the diameter d3 of the buff turntable 37 is 70 mm or more and less than 80 mm (here 74 mm). ), And the diameter d4 of the other buff turntable 38 is set to 80 mm or more and 100 mm or less (here, 90 mm).
As described above, the diameters d1 and d2 of the abrasive turntables 31 and 32 are the same, and the abrasive turntables 31 and 32 have the same diameters d1 and d2, respectively. A disc-shaped rough grinding material 44 for removing wrinkles on the surface layer covering the data recording portion and a disc-shaped grinding material 45 are attached. However, in order to improve the polishing accuracy, the diameter of the abrasive turntable to which the fine abrasive material is attached may be made larger than the diameter of the abrasive turntable to which the coarse abrasive material is attached.

Further, of the buff turntables 37 and 38, the diameter d3 of the buff turntable 37 (and the buff 46) to which the disc-like rough finish buff 46 is attached is set to the disc-like mirror finish buff 47. Although the diameter is smaller than the diameter d4 of the buff turntable 38 (and the buff 47), the diameter d3 may be larger than the diameter d4 or the same.
Incidentally, a loop tape 48 of a planar fastener is provided on the surface of the polishing material turntables 31, 32 and the buff turntables 37, 38 on the side of the polishing surface (the surface in contact with the optical disk 14). On the non-polished surface side surfaces of the materials 44 and 45 and the buffs 46 and 47, hook tapes of planar fasteners are provided. Thereby, attachment and removal of the abrasives 44 and 45 from the respective abrasive turntables 31 and 32 and attachment and removal of the buffs 46 and 47 from the respective buff turntables 37 and 38 can be easily performed with one touch.

The abrasives 44 and 45 attached to the abrasive turntables 31 and 32 are conventionally known grinding stones. For example, the abrasive surfaces of a disk-like base plate (disk) obtained by sintering ceramic particles, Diamond, ceramics, or metal abrasive particles are attached to the side of the surface in contact with the optical disk 14.
Further, the buffs 46 and 47 attached to the respective buff turntables 37 and 38 are conventionally known finishing disks, which are made of, for example, nylon, silk fiber, urethane, or the like. It is used with (including) particles such as ceramics of about 05 μm and a polishing liquid or a coating material.
The size of the abrasive particles used for the abrasives 44 and 45 and the size of the particles attached to the buffs 46 and 47 are appropriately selected according to the state of the wrinkles of the optical disk 14 to be polished.

Next, the arrangement positions of the abrasive turntables 31 and 32 and the buff turntables 37 and 38 will be described with reference to FIG.
Each of the abrasive turntables 31 and 32 and each of the buff turntables 37 and 38 are disposed so as to completely cover the entire radial direction region 43 of the data recording portion of the optical disk 14 at the same time. Specifically, it is arranged as follows with reference to a virtual line L that passes through the rotation center P of the optical disc 14 and divides the optical disc polishing apparatus 10 into the back side and the near side.
An angle θ1 formed by a line L1 passing through the rotation center p1 and the rotation center P of the abrasive turntable 31 and a line L2 passing through the rotation center p2 and the rotation center P of the abrasive turntable 32 is, for example, not less than 80 degrees and 90 degrees. Is less than 87 degrees (here 87 degrees). The angle θ2 formed by the line L1 and the virtual line L (the back side of the optical disc polishing apparatus 10) is, for example, not less than 35 degrees and not more than 45 degrees (here, 41 degrees).

Further, an angle θ3 formed by a line L3 passing through the rotation center p3 and the rotation center P of the buff turntable 37 and a line L4 passing through the rotation center p4 and the rotation center P of the buff turntable 38 exceeds 90 degrees, for example. It is less than 94 degrees (here 94 degrees). Note that the angle θ4 formed by the line L3 and the virtual line L is, for example, not less than 30 degrees and not more than 40 degrees (here, 36 degrees).
The rotation centers p 1 and p 2 of the respective abrasive turntables 31 and 32 and the rotation center p 3 of the buff turntable 37 are arranged in the outer circumference circle of the optical disk 14.
On the other hand, the rotation center p4 of the buff turntable 38 that performs mirror finish is disposed outside the outer circumference circle of the optical disk 14. For this reason, since the radius of the buff turntable 38 is larger than the radial length of the data recording portion of the optical disc 14 and smaller than the radius of the optical disc 14, it is necessary for the optical disc 14 to move without moving the buff 47 in the horizontal direction. The entire finishing area can be covered.

Subsequently, the first and second polishing mechanisms 17 and 18 of the respective abrasive turntables 31 and 32 and the third and fourth polishing mechanisms 19 and 20 of the respective buff turntables 37 and 38 will be described. Since the first to fourth polishing mechanisms 17 to 20 have substantially the same structure, only the second polishing mechanism 18 will be described below.
A central boss 49 of the abrasive turntable 32 is fixed to the output shaft 50 of the small motor 34. The elevating means 36 for moving the small motor 34 up and down passes through a mounting seat 51 provided on a side portion of the small motor 34 and vertical guide holes 52 and 53 provided in the mounting seat 51, and passes through the upper case. 13, guide rods 54, 55 fixed to the rack 13, a rack 56 fixed to the mounting seat 51, a pinion 57 that meshes with the rack 56, and the pinion 57 is attached to the output shaft via a coupling 58. And a small reduction motor 59 attached to the upper case 13 via a support member.

Each of the small motors 33, 34, 39, and 40 has a high-speed rotation having an output of 1/10 or less of the output of the main motor 24 and 1/45 or more (more preferably 1/20 or less and 1/35 or more). It is preferable to use a direct current motor (for example, 1000 to 8000 rpm).
The small reduction motor 59 is composed of a combination of a reduction motor and a pulse motor or DC servo motor of about 2 to 12 w capable of accurately controlling the rotation speed, and the rotation of the output shaft is set to about 5 to 30 rpm. Is preferred.
The small motors 33, 34, 39, and 40 described above have the same output within the above-described output range, but may have different outputs. Moreover, although the same thing is used for the small reduction motor 59 in the 1st-4th grinding | polishing mechanisms 17-20, you may use a different thing.

Since the optical disc polishing apparatus 10 is configured as described above, the optical disc 14 is placed on the optical disc turntable 15 disposed in the lower case 12 with the upper case 13 opened, and each abrasive turntable 31 is placed. 32, suitable abrasives 44, 45 are attached, and buffs 46, 47 attached to the respective buff turntables 37, 38 contain appropriate abrasive particles or coating materials, and the upper case 13 is closed.
When polishing is started in this state, for example, in the case of fully automatic operation, rough cutting is performed by the first polishing mechanism 17 and fine cutting is performed by the second polishing mechanism 18 to cover the data recording portion of the optical disk 14. The wrinkles on the surface layer can be removed. Then, the surface layer of the optical disk 14 from which the wrinkles have been removed is rough-finished by the third polishing mechanism 19 and further mirror-finished by the fourth polishing mechanism 20 to finish the surface layer of the surface layer of the optical disk 14. become.
This series of polishing processes will be described in detail with reference to FIGS.

In the upper case 13 or the lower case 12, the control unit 60 of the optical disc polishing apparatus 10 is accommodated. FIG. 5 shows the main hardware configuration of the control unit 60.
As shown in FIG. 5, the optical disc polishing apparatus 10 includes a main motor 24, small motors 33, 34, 39, and 40, small reduction motors 59, an upper case 13 closing detection sensor 61, a power switch 62, and an operation lamp. 63, and these are electrically connected to the control unit 60.

In the control unit 60, a current sensor 64 that detects current values of the main motor 24 and the small motors 33, 34, 39, and 40, an A / D conversion circuit 65 that digitizes a signal detected by the current sensor 64, A CPU 66, a RAM 67, and a ROM 68 that form the core of the computer are provided, and are connected to the above-described devices and the A / D conversion circuit 65 through an interface 69.
As shown in FIG. 1, in addition to the power switch 62 described above, an emergency stop switch 70, an A switch 71, a B switch 72, a C switch 73, a D switch 74, an automatic polishing / manual polishing switching switch are provided on the front surface of the lower case 12. 75.

When the optical disk polishing apparatus 10 is operated in the semi-automatic operation mode or the full-automatic operation mode, the entire process is performed according to the contents described in the ROM 68 of the computer, which will be described with reference to FIG. As described above, the optical disc polishing apparatus 10 is provided with the first to fourth polishing mechanisms 17 to 20, and when these are used alone (modes 1 to 4) and when these are used continuously. Although there is (mode 5), the basic operation is the same, so only mode 1 will be described, and only the differences will be described for modes 2 to 4 and 5. In each of the modes 1 to 4, the automatic polishing / manual polishing switching switch 75 is set to the manual side and the A switch 71 is operated, and then the mode 1 is activated, and the B switch 72 is activated, the mode 2 is activated. (Hereinafter, the same applies to the C switch 73 and the D switch 74). When the automatic polishing / manual polishing switch 75 is set to the automatic side and the A switch 71 is operated, the mode 5 is entered.

First, it is a condition that the power switch 62 is turned on (the operation lamp 63 is lit), and appropriate for the abrasive turntables 31 and 32 and the buff turntables 37 and 38 (only one that operates) ( That is, it is confirmed by the close detection sensor 61 that the upper case 13 is closed, assuming that the abrasives 44 and 45 or the buffs 46 and 47 to which the abrasive or polishing liquid has been applied are attached (step S1).

Next, after confirming that the polishing procedure is mode 1 and normal polishing (step S2), any one of the A switch 71, the B switch 72, the C switch 73, and the D switch 74 is operated. A small reduction motor that constitutes the lifting and lowering means 35 by confirming that the polishing start switch (which is a self-holding type switch) to be turned on is turned on (step S3). 59 is rotated to lower the abrasive turntable 31 together with the abrasive 44 (step S4). Then, immediately before the surface of the abrasive 44 contacts the surface of the optical disk 14, the small motor 33 is turned on (step S5). When the abrasive 44 comes into contact with the optical disk 14 mounted on the optical disk turntable 15, the load current D1 of the small motor 33 increases, and this is measured by the current sensor 64 to confirm that the predetermined current value a has been exceeded. Then, it is confirmed that the abrasive 44 is in contact with the surface of the optical disk 14 (step S6).

Note that the contact of the abrasive 44 with the surface of the optical disk 14 may be detected by the load current of the main motor 24. At this time, it is confirmed that the load current of the main motor 24 has increased, and the small motor 33 is turned on. Since the abrasive turntable 31 is not provided with a brake mechanism and the small motor 33 is turned off, the abrasive turntable 31 can be freely rotated. , It rotates in the direction opposite to the rotation direction of the optical disk 14.
When the small motor 33 is turned on, it rotates in the direction opposite to the rotation direction of the optical disk 14. In this state, since the abrasive 44 is gradually lowered, the load of the small motor 33 is increased, and the load current D1 corresponding to the polishing torque and the pressing force (polishing pressure) becomes the current value b (a <b ) (Step S7), and the lowering of the abrasive 44 is stopped by stopping the small reduction motor 59. And the count of the timer for measuring polishing time is started (step S8).
The reason why the abrasive 44 (the same applies to the abrasive 45 and the buffs 46 and 47) is rotated by the small motor 33 (34, 39, 40) is freely rotatable depending on the type of the abrasive 44 and the type of polishing liquid used. This is because the abrasive 44 in the state may not slide and rotate even if it contacts the optical disk 14. Since it is sufficient for the small motor 33 to only assist the rotation of the abrasive 44, a small output small motor is used as compared with the main motor 24. The power for polishing the optical disk 14 is generated by the main motor 24.

When the polishing time timer counts up (step S9), the small reduction motor 59 reverses, the abrasive 44 rises, and the main motor 24 and the small motors 33 (34, 39, 40) stop after a short delay (step S9). Step S10).
The upper limit of the elevating means 35 is set by counting up a timer, and when the small reduction motor 59 rotates for a predetermined time, the distance is measured and stopped. If the number of rotations is counted using the motor that drives the small reduction motor as a pulse motor, the stopping accuracy is further improved (step S11).

When the second to fourth polishing mechanisms 18 to 20 are individually operated (modes 2 to 4), the operation is the same as that of the first polishing mechanism 17.
In the case where the first to fourth polishing mechanisms 17 to 20 are continuously operated (mode 5), first, the first polishing mechanism 17 is actuated and completed up to step S11. The polishing mechanisms 18 are sequentially operated.
As described above, by providing the first to fourth polishing mechanisms 17 to 20, for example, a rough grinding material (for example, # 2500 to 3500) and a finer grinding material (for example, # 1300 to # 1300). 2000), and then a rough buff containing abrasive particles (eg, about # 120) and a mirror-finish buff containing finer abrasive particles (eg, about # 300). Thus, the polishing time of the optical disk 14 can be accelerated.

When the upper case 13 is closed, the wide edge portion 77 provided around the lower case 12 comes into contact with the wide edge portion 78 provided around the upper case 13 so that the upper case 13 and the lower case The structure is such that the case 12 can be accurately positioned.
Inside the wide edge portion 77 of the lower case 12 is provided a dam portion 79 made of resin (preferably a hard resin) that prevents cutting powder from the optical disk 14 from being scattered around. When the upper case 13 is closed, the dam portion 79 is fitted inside the wide edge portion 78 of the upper case 13 (see FIG. 1).

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the optical disc polishing apparatus of the present invention is configured by combining a part or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
Further, in the above embodiment, the case of automatic operation has been described, but it is naturally possible to manually operate the main motor, the small motor, and the small reduction motor individually under certain conditions. It is also free to provide these operation switches.

1 is a perspective view of an optical disk polishing apparatus according to an embodiment of the present invention. It is a partially omitted front sectional view of the same optical disk polishing apparatus. It is a plane sectional view of the optical disk polisher. It is explanatory drawing which shows the positional relationship of each abrasive | polishing material turntable with respect to the optical disk mounted on the optical disk turntable of the optical disk grinding | polishing apparatus, and each buff turntable. It is an electric circuit block diagram of the optical disk polishing apparatus. It is an operation | movement flowchart of the optical disk grinding | polishing apparatus.

10: optical disk polishing apparatus, 11: hinge, 12: lower case, 13: upper case, 14: optical disk, 15: optical disk turntable, 16: optical disk rotation drive mechanism, 17: first polishing mechanism, 18: second Polishing mechanism, 19: third polishing mechanism, 20: fourth polishing mechanism, 21: telescopic stopper, 22, 23: lock mechanism, 24: main motor, 25: output shaft, 26: boss, 27: guide , 28: disc press, 29: seat, 30: support member, 31, 32: abrasive turntable, 33, 34: small motor, 35, 36: lifting means, 37, 38: buff turntable, 39, 40: Small motor, 41, 42: lifting means, 43: radial direction, 44, 45: abrasive, 46, 47: buff, 48: loop tape, 49: boss, 50: output shaft, 1: mounting seat, 52, 53: vertical guide hole, 54, 55: guide rod, 56: rack, 57: pinion, 58: coupling, 59: small reduction motor, 60: controller, 61: close detection sensor, 62: Power switch, 63: Operation lamp, 64: Current sensor, 65: A / D conversion circuit, 66: CPU, 67: RAM, 68: ROM, 69: Interface, 70: Emergency stop switch, 71: A switch 72: B switch, 73: C switch, 74: D switch, 75: Automatic polishing / manual polishing switch, 77: Wide edge, 78: Wide edge, 79: Weir

Claims (5)

Includes a lower case, a pivotally linked upper case through a hinge to the lower part casing, the upper portion of the lower case is driven to rotate are disposed in a horizontal state, the optical disc turntable for placing the optical disk in the upper Protruding ,
Wherein the lower portion of the upper case, eccentric respectively the optical disc turntable and two abrasive respectively disposed at different positions turntable and buff the turntable is projected arranged, resting on the optical disc turntable The surface layer covering the data recording portion of the optical disk is removed by an abrasive attached to the abrasive turntable, and the surface layer from which the defect is removed is surface-finished by a buff attached to the buff turntable. In the optical disc polishing apparatus
Each of the abrasive turntable and the buff turntable has a width that completely covers the entire radial direction of the data recording portion of the optical disc,
The two abrasive turntables are detachably mounted with rough and fine abrasives, and the two buff turntables are removable with rough finish and mirror finish buffs, respectively. Installed and
The diameter of each abrasive turntable is 60 mm or more and less than 70 mm, the diameter of the buff turntable used for rough finishing is 70 mm or more and less than 80 mm, and the diameter of the buff turntable used for mirror finishing is 80 mm or more and 100 mm or less. An optical disc polishing apparatus, wherein an outer diameter of the buff turntable used for finishing is larger than an outer diameter of the abrasive turntable and an outer diameter of the buff turntable used for rough finishing. In the optical disk polishing apparatus according to claim 1, wherein, in the lower case, wherein the light main motor the disc turntable is driven to rotate is disposed in the upper case, the abrasive turntable and the buff turntable, each of the A small motor that rotationally drives in a direction opposite to the rotation direction of the optical disk turntable and a lifting unit that includes a small reduction motor and lifts and lowers the small motor together with the abrasive turntable and the buff turntable are accommodated. optical disk polishing apparatus characterized by being. 3. The optical disk polishing apparatus according to claim 2, wherein the small motor that rotationally drives the abrasive turntable comprises a direct current motor, and measures the polishing pressure of the abrasive according to the current value of the direct current motor, and the elevating means. An optical disc polishing comprising: detecting that the abrasive lowered by contact with the optical disc placed on the optical disc turntable and that the abrasive is grinding the optical disc placed on the optical disc turntable are detected. apparatus. 4. The optical disk polishing apparatus according to claim 2 or 3, wherein the small motor that rotationally drives the buff turntable is a direct current motor, and measures the polishing pressure of the buff according to the current value of the direct current motor. An optical disk polishing apparatus, wherein the apparatus detects that the buff lowered by contact with the optical disk mounted on the optical disk turntable and that the buff is polishing the optical disk mounted on the optical disk turntable. An optical disc turntable placed in a horizontal state and rotationally driven to place an optical disc thereon, and two abrasive turntables and buff turntables that are each eccentric with respect to the optical disc turntable and arranged at different positions And removing the wrinkles of the surface layer covering the data recording portion of the optical disc mounted on the optical disc turntable with an abrasive attached to the abrasive turntable, and removing the surface layer from which the wrinkles have been removed. An operation method of an optical disc polishing apparatus for performing surface finishing by a buff attached to the buff turntable,
Each of the abrasive turntable and the buff turntable has a width that completely covers the entire radial direction of the data recording portion of the optical disc,
The two abrasive turntables are detachably mounted with rough and fine abrasives, and the two buff turntables are removable with rough finish and mirror finish buffs, respectively. Installed and
The diameter of each abrasive turntable is 60 mm or more and less than 70 mm, the diameter of the buff turntable used for rough finishing is 70 mm or more and less than 80 mm, and the diameter of the buff turntable used for mirror finishing is 80 mm or more and 100 mm or less. The outer diameter of the buff turntable used for finishing is larger than the outer diameter of the abrasive turntable and the outer diameter of the buff turntable used for rough finishing ,
The polishing of the optical disk placed on the disk turntable is performed by 1) the abrasive turntable to which the rough abrasive is attached, 2) the abrasive turntable to which the fine abrasive is attached, 3 An operation method of an optical disk polishing apparatus, wherein the buff turntable to which the rough finish buff is attached and the buff turntable to which the mirror finish buff is attached are performed in this order.

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