JP4320303B2 - Positioning device for disc manufacturing - Google Patents

Description

  The present invention relates to a positioning apparatus for manufacturing a disk that positions a circular opening of a flexible sheet bonded to the disk substrate in a circular center opening of a disk-shaped disk substrate.

  Conventionally, for example, as an optical disc, a CD (compact disc), a CD-R (compact disc-recordable), a DVD (digital versatile disc), a DVD-R (digital versatile disc-recordable), and the like are already widely used.

  In recent years, there has been a demand for storing a larger amount of information such as video information for optical discs, and studies on increasing the density of recorded information are in progress. The information recording density for such an optical disc is generally determined by the spot size of the light beam on the disc, and this spot size is proportional to λ / NA, where λ is the laser wavelength and NA is the numerical aperture of the objective lens. For this reason, in order to increase the recording density on the optical disc, it is necessary to shorten the wavelength of the laser beam and to increase the NA of the objective lens is effective. However, since the coma generated by the tilt of the optical disk increases in proportion to the third power of the NA, the margin for the tilt due to the tilt of the disk becomes extremely small by increasing the NA, and even a slight tilt causes the beam spot to be blurred and high Recording and reproduction at a density cannot be realized. Therefore, in a conventional optical disc suitable for high density, a sufficiently thin (for example, about 0.1 mm) flexible layer is used as a laser light transmission layer in order to suppress an increase in coma due to the tilt of the disc due to high NA. An adhesive sheet is provided on the disk substrate.

  In an optical disk production line, for example, as shown in Patent Document 1 below, a flexible sheet made of a light-transmitting thin film resin is bonded to a recording surface of a disk substrate on which a recording layer has been previously formed. It is done in the process.

FIG. 10 is a diagram illustrating a state when a flexible sheet is bonded to the disk substrate.
As shown in FIG. 10, the support base 131 is first disposed on a turntable (not shown), and the flexible sheet 102 is disposed on the support portion 132 formed on the upper surface of the support base 131. At this time, the flexible sheet 102 has the adhesive film formed on one side face upward and the center pin 133 formed so as to protrude upward from the support part 132 passes through the opening of the central part. It is arranged in the state. Next, the disk substrate 101 on which a recording layer is formed in advance is conveyed above the flexible sheet 102 arranged on the support base 131 by an arm or the like (not shown), and the center pin 133 is inserted through the center opening. At this time, the disk substrate 101 has a central opening whose diameter is smaller than the opening of the flexible sheet 102 at the front end portion 133a of the center pin 133 whose diameter is reduced, and the recording layer faces the flexible sheet 102 side. It is held in the state. Then, the disc substrate 101 is held in a state of being separated from the flexible sheet 102 so that the central axis of the flexible sheet 102 and the central axis S1 of the disc substrate 101 coincide with each other. Then, the flexible sheet 102 and the disk substrate 101 held on the support base 131 are bonded inside a vacuum chamber set in a vacuum atmosphere in the bonding apparatus.

JP 2004-029323 A

  By the way, when the disk substrate is supplied and bonded from above with the flexible sheet facing down as shown in FIG. 10, the play between the flexible sheet 102 and the center pin 133 for positioning or the disk substrate 101. There is room for improvement in that the bonding position between the flexible sheet 102 and the disk substrate 101 is shifted due to the backlash between the center pin 133 and the center pin 133.

  In Patent Document 1, when a movable lever is provided on a center pin and bonded, a disk substrate is disposed after a flexible sheet is disposed, and the disk substrate and the center pin are engaged. By moving and positioning the lower flexible sheet, the bonding position of the flexible sheet and the disk substrate is prevented from shifting. However, the flexible sheet is manufactured by punching from the cover sheet, but curling may occur during the punching. If the curl generated in the flexible sheet is large, there is a concern that in the configuration of Patent Document 1, the movable lever cannot be brought into contact with the flexible sheet, and positioning cannot be performed.

  Further, in order to prevent the displacement of the bonding position, it is necessary to reliably hold the positional relationship until the disk substrate and the flexible sheet come into contact with each other.

  It is an object of the present invention to provide a positioning device for manufacturing a disc capable of accurately positioning an opening of a flexible sheet in a central opening of a disc substrate.

  The above object of the present invention is a disk manufacturing positioning apparatus for positioning a circular opening of a flexible sheet to be bonded to the disk substrate at a circular center opening of a disk-shaped disk substrate, A support part for disposing the flexible sheet on the upper surface, a center pin provided so as to protrude upward from the support part, and holding the flexible sheet and the disk substrate, and a cylindrical shape having a peripheral surface. A reduced diameter portion having a diameter smaller than that of the other portion is formed in the portion, and an open / close pin that is driven in an up and down direction inside the center pin. The center pin has a cylindrical pin body, and the pin body A flexible sheet insertion portion that is held in contact with and held inside a central opening of the flexible sheet, and is positioned closer to a distal end side of the center pin than the flexible sheet insertion portion; The flexibility A board insertion portion that is smaller in diameter than the pin insertion portion and is held in contact with the inside of the central opening of the disk substrate, and swings between a closed state and an open state around the support shaft portion of the pin body portion. A movable chuck lever is provided. When the chuck lever is in a closed state, the upper end portion is accommodated in the substrate insertion portion. When the chuck lever is in an open state, the pin barrel portion is located above the support shaft portion in the chuck lever. It is achieved by a positioning apparatus for manufacturing a disc, wherein the flexible sheet is positioned by being driven outward from the peripheral surface of the disk and contacting the opening of the flexible sheet. .

  According to the positioning device of the present invention, the opening / closing position of the chuck lever relative to the center pin can be adjusted by moving the opening / closing pin. At the time of bonding, the flexible sheet is first held by the center pin, and before the substrate is supplied, the curl of the flexible sheet is corrected and the chuck lever is opened. The sheet can be held in a flat state without curling. If the disk substrate is arranged and positioned with the flexible sheet held in this way, the disk substrate and the flexible sheet can be bonded together at an accurate bonding position when bonding. Will be able to.

  The positioning device is preferably configured to blow air onto the upper surface of the flexible sheet when the chuck lever is driven to the open position. In this way, the flexible sheet can be positioned by correcting the curl of the flexible sheet and opening the chuck lever when the flexible sheet is flat.

  In the positioning device, a plurality of chuck levers are preferably provided at intervals in the circumferential direction of the pin body portion, and it is most desirable to provide three chuck levers at equal intervals in the circumferential direction. In this way, the flexible sheet can be positioned more accurately.

  ADVANTAGE OF THE INVENTION According to this invention, the positioning apparatus for disk manufacture which can position the opening part of a flexible sheet | seat correctly in the center opening of a disk board | substrate can be provided.

Hereinafter, an embodiment of a positioning device according to the present invention will be described in detail with reference to the drawings, taking an optical disk as an example.
FIG. 1 is a view including a partially enlarged cross-sectional view showing an optical disc manufactured by performing bonding after being positioned by a positioning device of the following embodiment.

  The optical disc 1 enables higher-density information recording as compared with a conventional DVD. For example, a blue-violet laser beam having a short wavelength is used as a recording / reproducing laser beam as compared with a conventional optical disc. At the same time, by increasing the numerical aperture NA of the objective lens of the disk drive device to about 0.85, the single-side recording capacity of the 12 cm diameter optical disk 1 can be increased to about 27 gigabytes.

  The optical disk 1 includes a disk substrate 2 formed in a disk shape. As shown in the enlarged view of the portion X in FIG. 1, an information recording layer 4 and a flexible sheet 3 are sequentially laminated on one surface of the disk substrate 2 so as to cover the recording layer 4. ing.

  The recording layer 4 is formed by sequentially laminating a light reflecting layer 8 and a light absorbing layer 7 on the disk substrate 2. The flexible sheet 3 is composed of a resin film 5 and an adhesive film 6 formed on one surface of the resin film 5 and functions as a protective layer having optical transparency.

  The disk substrate 2 is molded by using a resin such as polycarbonate as a material. The resin film 5 of the flexible sheet 3 is, for example, polycarbonate, photo-curing acrylic resin, UV-curing acrylic resin, TAC, PMMA, or the like, and the adhesive film 6 is acrylic, It is formed of a rubber-based or silicon-based pressure-sensitive adhesive, and particularly when an acrylic-based pressure-sensitive adhesive is used, it is favorable in terms of transparency and durability.

  In this embodiment, for example, the thickness of the flexible sheet 3 of the optical disc 1 can be in the range of 95 μm to 105 μm, and the thickness range of the resin film 5 can be in the range of 10 μm to 100 μm. In addition, the thickness range of the adhesive film 6 can be in the range of 5 μm to 30 μm.

  At the center of the disk substrate 2, a circular center opening 2 a centering on the axis S that is the rotation center of the optical disk 1 is provided. In addition, a circular opening 3 a having a diameter larger than that of the central opening 2 a is formed around the axis S at the center of the flexible sheet 3.

FIG. 2 is a diagram showing a first embodiment of a positioning device according to the present invention. FIG. 3 is an enlarged view of a main part of the first embodiment of the positioning device. 4 is a cross-sectional view taken along the line PP in FIG. In FIG. 4, the flexible sheet is not shown and is omitted.
The positioning device 10 arranges the flexible sheet 3 before bonding on the circular upper surface of the support portion 12 provided on the upper portion of the support base 11, and then arranges the disk substrate 2 upward to perform positioning. It has a mechanism to perform.

  First, with the adhesive film 6 formed on one surface of the flexible sheet 3 facing upward, the center pin 20 is inserted into the opening 3a (see FIG. 1), and the flexible sheet 3 is supported by the support section. 12 on the top surface.

Next, the configuration of the center pin 20 will be described with reference to FIGS.
The center pin 20 includes a pin body 21 having a cylindrical shape. The pin body portion 21 is partially tapered so that the diameter of the upper peripheral surface on the insertion side of the flexible sheet 3 is smaller than the lower peripheral surface in the vertical direction. A flexible sheet insertion portion 22 that is in contact with the opening 3a of the flexible sheet 3 is formed in a portion where the lower peripheral surface of the pin body portion 21 is equal, and has a tapered peripheral surface in the pin body portion 21. An intermediate taper portion 23 is formed in the portion.

  A peripheral surface of the upper surface of the pin body 21 has a substantially horizontal surface in the radial direction, and an annular substrate support portion 26 is formed when viewed from above. Further, one or more (three in the present embodiment) divided pieces 24 projecting upward are formed on the inner side of the upper surface of the pin body portion 21. The segment piece 24 has a shape that is divided by a slit 24a with respect to another segment piece 24 adjacent in the circumferential direction, and a curved surface formed on the outer circumferential side is inclined toward the upper side of the center pin 20 at a tip end taper. It is part 24b.

  When the disk substrate 2 is arranged on the center pin 20, the divided piece 24 of the center pin 20 is inserted into the center opening 2a of the disk substrate 2 and guided along the tip tapered portion 24b. It arrange | positions on the upper surface of the board | substrate support part 26. FIG. Further, the disk substrate 2 is in contact with the inner side surface of the central opening 2 a of the disk substrate 2 with the disk substrate 2 disposed on the upper surface of the substrate support portion 26 on the outer peripheral surface of the base end portion of the divided piece 24. A board insertion portion 25 that restricts 2 to a reference position with respect to the center pin 20 is formed.

  The center pin 20 is provided with one or more (three in this embodiment) chuck levers 27 at intervals in the circumferential direction of the pin body 21. The chuck lever 27 is a member having a longitudinal dimension along the vertical direction (the vertical direction in FIG. 3) and swingable in an open state and a closed state as indicated by a broken line and an arrow in FIG.

  As shown in FIG. 4, the chuck lever 27 is supported by the support shaft portion 31, and the upper portion of the support shaft portion 31 is biasing means against the inner wall portion 28 provided inside the pin body portion 21. It is the structure supported in the state which loaded the urging | biasing force toward the outer-diameter side of the pin trunk | drum 21 by the spring member 29 which functions as.

  In the center pin 20, a cylindrical opening / closing pin 30 is provided inside the pin body portion 21. The opening / closing pin 30 is formed with a reduced diameter portion 30a having a smaller diameter than other portions of the peripheral surface, and is formed above the reduced diameter portion 30a via a tapered portion 30b, and the reduced diameter portion. A tip portion 30c having a diameter larger than 30a is formed. Also, a cylinder (not shown) that drives the open / close pin 30 up and down as shown by arrows in FIG. 4 is connected to the lower end 30 d of the open / close pin 30 inside the pin body 21 of the center pin 20.

  The chuck lever 27 is formed with an engaging portion 32 formed at the lower end portion located below the support shaft portion 31 so that at least a part thereof enters the inner side of the pin body portion 21 in the sectional view of FIG. Has been. The chuck lever 27 is provided such that the engaging portion 32 is in contact with or close to the peripheral surface of the opening / closing pin 30.

  When the engaging portion 32 at the lower end is brought into contact with or close to the outer peripheral side of the reduced diameter portion 30 a on the peripheral surface of the opening / closing pin 30, the chuck lever 27 is centered on the support shaft portion 31 by the biasing force of the coil spring 29. As shown by a broken line in FIG. 3, the portion above the support shaft portion 31 of the chuck lever 27 protrudes radially outward from a lever receiving groove 21 a formed on the peripheral surface of the pin body portion 21. To do. Thus, the chuck lever 27 is opened.

  On the other hand, when the open / close pin 30 is moved downward with respect to the pin body portion 21, the position of the engagement portion 32 of the chuck lever 27 is moved to the position of the reduced diameter portion 30a as the position of the reduced diameter portion 30a is also moved downward. Relative movement from the outer peripheral side to the outer peripheral side of the head 30c via the tapered portion 30b. Then, the engaging portion 32 contacts the head portion 30c having a larger diameter than the reduced diameter portion 30a in the opening / closing pin 30, so that the lower end portion of the chuck lever 27 rotates about the support shaft portion 31 by the biasing force. The portion of the chuck lever 27 above the support shaft portion 31 is accommodated in the lever accommodating groove 21 a of the pin body portion 21. Thus, the chuck lever 27 is closed.

Next, with reference to FIG. 5, an operation at the time of positioning the flexible sheet and the disk substrate by the positioning device of the present embodiment will be described.
As shown in FIG. 5A, first, the chuck lever 27 in the center pin 20 is closed, and the flexible sheet 3 is inserted through the center pin 20 and disposed on the upper surface of the support portion 12.

  As shown in FIG. 5B, when the flexible sheet 3 is arranged on the support portion 12, the center of the flexible sheet 3 is bent upward by the curl generated in the flexible sheet 3. In some cases, the support portion 12 may be separated from the upper surface. At this time, in order to securely position the flexible sheet 3 in contact with the support portion 12, in the present embodiment, in FIG. Air is sprayed onto the flexible sheet 3 from above as indicated by arrow A. Then, the upper surface of the portion of the flexible sheet 3 where the curl is generated is pressed against the upper surface of the support portion 12 by the pressure of the blown air.

  Then, in a state where the flexible sheet 3 is pressed against the upper surface of the support portion 12 by air, as shown in FIG. 5C, the open / close pin 30 is driven upward to open the chuck lever 27 of the center pin 20. By setting the state, the flexible sheet 3 comes into contact with the outer peripheral side surface of the chuck lever 27, is accurately positioned in the support portion 12, and curl is restricted below the support portion 12.

  In a state where the flexible sheet 3 is disposed on the support portion 12, the disk substrate 2 is held by the substrate support portion 26 while being locked to the divided piece 24 on the front end side of the center pin 20. When the disk substrate 2 is held on the center pin 20, the disk substrate 2 is held at the tip of the center pin 20, and therefore is substantially the same as the flexible sheet 3 held on the support portion 12. They are held in parallel and spaced apart.

  When the disk substrate 2 and the flexible sheet 3 are bonded together, as shown in FIG. 5 (d), the center pin 20 is moved downward relative to the support portion 12 to allow the disk substrate 2 and the flexible sheet 3 to move. While maintaining a substantially parallel positional relationship with the flexible sheet 3, the adhesive film 6 (see FIG. 1) on the upper surface of the flexible sheet 3 is placed on the lower surface of the disk substrate 2 (in this embodiment, the surface on the recording layer side). ) Can be contacted. Further, the bonding as in the present embodiment is performed inside a vacuum chamber (not shown), so that air does not enter between the disk substrate 2 and the flexible sheet 3, and bubbles are generated on the bonding surface. This can be prevented.

FIG. 6 is a diagram showing a top view of the center pin of the present embodiment.
In FIG. 6, when the center pin 20 is in a closed state, a state in which the chuck lever 27 is accommodated in the pin body portion 21 is indicated by a solid line. When in the closed state, the outer peripheral side surface of the chuck lever 27 forms the circumferential surface of the center pin 20 along the outer peripheral surface of the pin body 21. For this reason, when the center pin 20 is inserted into the flexible sheet 3, the flexible sheet 3 can be smoothly inserted without interfering with the chuck lever 27.

  When the chuck lever 27 is in the open state, the outer peripheral side surface of each chuck lever 27 protrudes from the peripheral surface of the pin barrel portion 21 toward the radial side, as indicated by a broken line in FIG. At this time, assuming a circle as shown by a one-dot chain line in the figure according to the outer peripheral side surface of the protruding chuck lever 27, the inner diameter of the flexible sheet 3 is 22.5 mm when the chuck lever 27 is in the open state. Then, the diameter D can be in the range of 20 mm to 25 mm. The diameter D is preferably in the range of +0.01 mm to +0.2 mm with respect to the inner diameter of the opening 3 a (see FIG. 1) of the flexible sheet 3.

  According to the positioning device 10 of the present embodiment, the open / close position of the chuck lever 27 relative to the center pin 20 can be adjusted by moving the open / close pin 30. At the time of bonding, first, the flexible sheet 3 is held on the center pin 20 and the curl of the flexible sheet 3 is corrected before the disk substrate 2 is supplied, and the chuck lever 27 is opened. By doing so, the flexible sheet 3 can be held in a flat state without curling. If the disk substrate 2 is arranged and positioned in such a manner that the flexible sheet 3 is held in this way, the disk substrate 2 and the flexible sheet 3 are accurately bonded at the time of bonding. Can be pasted together.

  It is preferable that air is blown onto the upper surface of the flexible sheet 3 when the chuck lever 27 is driven to the open position as in the positioning device 10 of the present embodiment. By doing this, the flexible sheet 3 is positioned by correcting the curl of the flexible sheet 3 and opening the chuck lever 27 when the flexible sheet 3 is flat. be able to.

  As in the positioning device 10 of the present embodiment, it is preferable that one or more chuck levers 27 are provided at intervals in the circumferential direction of the pin body portion 21, and three positions are provided at equal intervals in the circumferential direction. Most preferred. By doing so, the flexible sheet 3 can be positioned more accurately.

Next, a second embodiment of the positioning device according to the present invention will be described. FIG. 7 is a diagram illustrating a positioning operation by the positioning device according to the second embodiment. FIG. 8 is a plan view of the positioning device according to the second embodiment as viewed from above. FIG. 9 is a perspective view showing the operation of the positioning device of the second embodiment by (a) and (b).
The positioning device 40 shown in FIG. 7 includes a support portion 41 that holds the flexible sheet 3, and a center pin 50 that is provided so that the tip protrudes from the support portion 41 and has a cylindrical pin body portion 51. ing. A substrate support 51 a is formed at the upper end of the center pin 50. In addition, a substrate insertion portion 51b that holds the disk substrate 2 by being in contact with the inner side surface of the center opening 2a by being inserted through the center opening 2a of the disk substrate 2 is formed at the center.

  A cylindrical pin support portion 52 is provided on the lower end surface of the pin body portion 51 of the center pin 50. A drive mechanism (not shown) is attached to the pin support portion 52, and the center pin 50 can be moved up and down relative to the support portion 41 by the drive mechanism. In the present embodiment, the outer peripheral surface of the pin body portion 51 has the same outer diameter that does not have a tapered portion, and functions as a flexible sheet insertion portion.

A guide member 53 that can be driven up and down relative to the center pin 50 is housed and held in the center pin 50.
At the tip of the guide member 53, a guide portion 53a having a tapered surface formed so that the diameter decreases upward is formed. The guide part 53a is provided so as to surround the periphery of the substrate support part 51a of the center pin 50 in a state where the center pin 50 is positioned upward. At this time, the guide portion 53a is positioned such that the tapered surface formed on the outer periphery reaches the upper end portion of the center pin 50 from the substrate support portion 51a. In the state where the center pin 50 is positioned below, the guide portion 53a is housed inside the pin body portion 51, so that the pin body portion 51, which is a flexible sheet insertion portion, and the substrate insertion portion 51b. A substrate support portion 51a provided on the stepped surface (the upper end surface of the pin body 51) is exposed upward, and the disk substrate 2 can be disposed on the upper surface of the substrate support portion 51a. 2 does not interfere with the guide portion 53a.

  A guide support portion 54 extends downward from the lower end portion of the guide member 53. The guide support portion 54 is inserted into the pin support portion 52 and driven separately from the center pin 50 by a drive mechanism (not shown). Is possible. By doing so, the guide member 53 can be moved upward with respect to the center pin 50 so that the guide portion 53a protrudes from the upper end portion (substrate support portion 51a) of the center pin 50. On the other hand, the guide member 53 By moving 53 downward with respect to the center pin 50, the guide portion 53a can be accommodated in the pin body portion 51 of the center pin 50.

  As shown in FIG. 7A, first, the pin body 51 of the center pin 50 is protruded from the upper surface of the teacher's time part 41, and the guide member 53 is moved upward with respect to the center pin 50. The guide part 53a is made to protrude from the substrate support part 51a of the center pin 50. Then, the guide part 53a is inserted through the opening 3a (see FIG. 1) of the flexible sheet 3 from above and guided along the guide part 53a, and the flexible sheet 3 is guided by the pin body of the center pin 50. Invite to the circumference of part 51. At this time, since the guide portion 53a protrudes above the substrate support portion 51a of the center pin 50, the flexible sheet 3 can be smoothly inserted to the pin body portion 51 without interfering with the substrate support portion 51a. become.

  In the present embodiment as well, as in the above embodiment, air can be supplied from above with the flexible sheet 3 held by the support portion 41. By so doing, the curled portion of the flexible sheet 3 comes into contact with the upper surface of the support portion 41 by the air pressure, and positioning can be performed more reliably.

  After the flexible sheet 3 is arranged on the support portion 41, as shown in FIG. 7B, the guide member 53 is moved downward relative to the center pin 50, and the guide portion 53 a becomes the pin body portion 51. It is assumed that it is housed inside. Then, the substrate insertion portion 51 b is inserted into the central opening 2 a (see FIG. 1) of the disk substrate 2, and the disk substrate 2 is disposed on the substrate support portion 51 a formed at the upper end of the pin body portion 51. At this time, the disc substrate 2 and the flexible sheet 3 are respectively held so as to be substantially parallel to each other while being separated from each other in the vertical direction.

  Next, by driving a drive mechanism (not shown) connected to the pin support portion 52, the center pin 50 moves downward, and the pin body portion 51 moves from the opening 3a of the flexible sheet 3 (see FIG. 1). On the other hand, the flexible sheet 3 is left on the upper surface of the support portion 41. Further, since the center pin 50 moves downward and the disk substrate 2 supported by the substrate support portion 51a also moves downward, it contacts the upper surface of the flexible sheet 3 (adhesive film 6 shown in FIG. 1).

  By further moving the center pin 50 downward, the tip of the center pin 50 eventually sinks into the support portion 41. At this time, the disk substrate 2 and the flexible sheet 3 are placed on the upper surface of the support portion 41. Bonded over the entire surface.

  In this way, the positioning device 40 drives the guide member 53 upward to cause the guide portion 53a to protrude from the tip portion of the center pin 50, and the opening 3a of the flexible sheet 3 according to the guide portion 53a. By inserting the center pin 50 through (see FIG. 1), the flexible sheet 3 can be held on the upper surface of the support portion 41. Further, by driving the guide member 53 downward, the guide portion 53a is accommodated in the center pin 50, so that the disk substrate 2 can be supported by the substrate support portion 51a without interfering with the guide portion 53a. it can. As described above, the flexible sheet 3 and the disk substrate 2 can be supported by the support portion 41 and the center pin 50 by driving the guide member 53 up and down, and the guide member 53 is supported by the center pin 50. Since it can also be configured to be coaxially provided inward, it can be made less susceptible to the influence of curl generated in the flexible sheet 3 than a configuration in which a lever that opens and closes is provided on the outer periphery of the center pin 50. .

  As described above, the optical disk positioning apparatus has been described as an example in the present embodiment. However, the present invention is not limited to this, and the present invention is not limited to this, and the positioning of the magnetic disk master, the optical disk master, and the stamper protective sheet can be performed. Can be used.

It is a figure which shows an example of the optical disk obtained by bonding using the optical disk positioning device of embodiment concerning this invention. It is a figure which shows 1st Embodiment of a positioning device. It is a principal part enlarged view of 1st Embodiment of a positioning device. It is the PP sectional view taken on the line of FIG. It is a figure explaining the operation | movement at the time of positioning of a flexible sheet | seat and a disc board | substrate with the positioning device of 1st Embodiment. It is a figure which shows the upper surface view of the center pin in the positioning device of 1st Embodiment. It is a figure which shows the operation | movement of positioning by the positioning device of 2nd Embodiment. It is a top view of the state which looked at the positioning device of a 2nd embodiment from the upper part. It is the perspective view which showed operation | movement of the positioning device of 2nd Embodiment by (a), (b). It is a figure explaining the state at the time of bonding a flexible sheet to a disk substrate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Disc substrate 3 Flexible sheet | seats 10 and 40 Positioning device 20 and 50 Center pin 27 Chuck lever 30 Opening / closing pin 53 Guide member

Claims (3)

A disk positioning apparatus for positioning a circular opening of a flexible sheet to be bonded to the disk substrate at a circular center opening in a disk-shaped disk substrate,
A support part for disposing the flexible sheet on an upper surface;
A center pin provided so as to protrude upward from the support portion, and holding the flexible sheet and the disk substrate;
In a cylindrical shape, a reduced diameter portion having a smaller diameter than the other part is formed in a part of the peripheral surface thereof, and includes an opening / closing pin that drives in the vertical direction inside the center pin,
The center pin has a cylindrical pin body portion, and a flexible sheet insertion portion that is held in contact with an inner side of a central opening of the flexible sheet on the peripheral surface of the pin body portion, and A substrate insertion portion is formed which is positioned on the distal end side of the center pin from the flexible sheet insertion portion and has a diameter smaller than that of the flexible sheet insertion portion and is held in contact with the inside of the central opening of the disk substrate. And
A chuck lever is provided that can swing between a closed state and an open state about a support shaft portion of the pin body portion. When the chuck lever is in a closed state, the upper end portion is accommodated in the substrate insertion portion, and the open state At this time, the upper side of the chuck lever in the chuck lever is driven outward from the peripheral surface of the pin body portion, and is brought into contact with the opening portion of the flexible sheet, whereby the flexible sheet A positioning apparatus for manufacturing a disk, characterized in that   The disk positioning device according to claim 1, wherein when the chuck lever is driven to the open position, air is blown onto an upper surface of the flexible sheet.   3. The disk positioning device according to claim 1, wherein a plurality of the chuck levers are provided at intervals in the circumferential direction of the pin body.

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