JP3113064B2 - Optical disk manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk manufacturing apparatus, and more particularly to an apparatus for accurately connecting a clamping plate to the center of a disk body. In this specification, an optical disk is used in a broad sense including a magneto-optical disk.

[0002]

2. Description of the Related Art An optical disk has a clamping plate fixed at the center. The clamping plate is for rotating the optical disk, and is formed by pressing a metal plate into a disk shape. The clamping plate is connected to the center of the disk body. MD (mini-disc) has a little play without fixing the clamping plate to the disc body.
It is necessary to connect in a state that can be done. The misalignment between the center of the clamping plate and the disk body causes a tracking error of the disk body. As the recording density of the optical disk increases, the track pitch becomes narrower, and a tracking error easily occurs. The track pitch of MD is 1.
It is set to 6 μm. An optical disc is characterized in that the recording density can be increased. Therefore, it is extremely important how to reduce the occurrence of tracking errors.
In order to realize this, it is particularly important that the clamping plate and the disk body are accurately connected.

FIG. 1 shows a conventional apparatus for connecting a clamping plate to a disk body. The apparatus shown in this figure includes a transport member 3 for supplying the disk main body 1 to a press position. The transport member 3 has a disk shape, and a mounting table 4 of the disk main body 1 is provided on the outer periphery at a constant pitch. In this apparatus, the clamping plate 2 is connected to the disk body 1 in the following steps. The disc body 1 is set on the mounting table 4 of the transport member 3. The clamping plate 2 is set at the center of the disk body 1. The transport member 3 moves to transport the disk body 1 directly below the heating press member 5. In this state, the movement of the transport member 3 is stopped.
The heating press member 5 descends, heat-presses the central portion of the disk main body 1 placed on the mounting table 4, crushes a part of the plastic disk main body 1, and fixes the clamping plate 2 to the disk main body 1. Connect to center. FIG. 2 shows a state in which the clamping plate 2 is connected to the disk main body 1. The disk main body 1 shown in FIG. 1 is crushed by the heating press member 5 so that the periphery of the clamping plate 2 is indicated by a chain line, and the clamping plate 2 is connected. Clamping plate 2 connected in this state
Is connected to the disk body 1 in a state where play is possible to some extent. When the clamping plate 2 is connected, the heating press member 5 rises, the transport member 3 moves, and the next mounting table 4 is transferred directly below the heating press member 5. afterwards,
Are repeated to connect the clamping plate 2 to the disk main body 1. The disk body 1 to which the clamping plate 2 is connected is taken out from the transport member 3 and supplies the disk body 1 with the clamping plate 2 set at the center to the portion where the disk body 1 is taken out.

[0004]

The device having this structure has a feature that the clamping plate can be efficiently connected to the disk body. However, there is a disadvantage that it is difficult to accurately connect the clamping plate to the center of the disk body. In particular, there is a disadvantage that it is extremely difficult to accurately connect the clamping plate to the center of the disk body for a long period of time. Further, the manufactured optical disk has a disadvantage that the connection position of the clamping plate may vary. In addition, there is a disadvantage that the adjustment work for reducing the variation in the connection position of the clamping plates is extremely troublesome. This device has such a drawback because the disk body set on the conveying member is heated and pressed to connect the clamping plate.
In other words, this apparatus is caused by the fact that the displacement error of the transfer member transferring the disk body, the distortion of the shape of each mounting table, and the like are accumulated and the disk body cannot be transferred to an accurate position. In order to solve this drawback, it is necessary to make the processing accuracy of the member for transferring the disk body by the transfer member extremely high. In addition, it is necessary to process a large number of mounting tables with extremely high accuracy. However, no matter how high the processing accuracy at the time of assembling, there is a drawback in that, as it is used, an error occurs due to abrasion with time, and the coupling position of the clamping plate shifts due to this.

The present invention has been developed with the object of further solving this drawback. An important object of the present invention is to easily connect the clamping plate to the center of the disk body without any variation by simple adjustment. An object of the present invention is to provide an optical disk manufacturing apparatus capable of accurately connecting a clamping plate for a long period of time with less change over time.

[0006]

The device of the present invention has the following arrangement to achieve the above-mentioned object. (A) The optical disk manufacturing apparatus comprises: a transport member 3 for transporting a plastic disk body 1;
A press table 7 for setting and pressing the disk body 1 to be transferred by the press, and heating and pressing a central portion of the disk body 1 set on the press table 7 and having a clamping plate 2 disposed at the center. 2 and a heating press member 5 for connecting the disk 2 to the disk body 1. (B) The transport member 3 comprises an upper and lower base 6 on which the disk main body 1 is set, a transfer member main body 8 for vertically connecting the upper and lower bases 6, and an up and down base 6 to move the disk main body 1 up and down. And a vertical moving mechanism for setting the press table 7. (C) The upper and lower bases 6 have a supporting portion 6A for supporting the peripheral edge of the disk main body 1, and the inside of the supporting portion 6A is vertically opened. (D) The press table 7 has a receiving surface which is a central portion of the disk main body 1 and supports a lower surface of a connecting portion of the clamping plate 2. (E) The heating press member 5 includes the clamping plate 2
Has a pressing surface 5A for connecting the clamping plate 2 by heating and pressing the disk main body 1 at the peripheral edge of the disk. (F) The transfer member body 8 transfers the upper and lower tables 6 to move the disk body 1 above the press table 7, and the vertical moving mechanism lowers the upper and lower tables 6 to set the disk body 1 on the press table 7. In this state, the heating press member 5 heats and presses the central portion of the disk main body 1 so that the clamping plate 2
Is connected to the disk main body 1.

[0007]

According to the optical disk manufacturing apparatus of the present invention, the clamping plate is connected to the center of the disk body as follows. The disc main body 1 is set on the support 6A of the upper and lower bases 6. The clamping plate 2 is set at the center of the disk body 1. With the upper and lower tables 6 raised, the transfer member body 8 is driven to move the disk body 1 above the press table 7. The upper and lower bases 6 are lowered, and the disk main body 1 is set on the receiving surface of the press base 7.
While holding the upper and lower bases 6 in the lowered state, the heating press member 5
Descend. The heating press member 5 heats and presses the central portion of the disk body 1 to connect the clamping plate 2 to the disk body 1. After the heating press member 5 rises, the upper and lower bases 6 also rise. The ascending and descending table 6 removes the disk body 1 to which the clamping plate 2 is connected from the press table 7. With the upper and lower bases 6 raised,
The transfer member body 8 is driven to remove the disk body 1 to which the clamping plate 2 is connected from the press table 7 and to supply the disk body 1 to which the clamping plate 2 is not connected to the press table 7. Thereafter, the steps (1) to (4) are repeated to connect the clamping plate 2 to the disk main body 1. The disk main body 1 to which the clamping plate 2 is connected is discharged from the upper and lower bases 6.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify an apparatus for embodying the technical idea of the present invention, and the apparatus of the present invention changes the material, shape, structure, and arrangement of the components to the following structure. Not specified. The device of the present invention can be subjected to various modifications within the scope of the claims.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims" and "means for solving the problem". No. column "and members indicated in the" action column ". However, the members described in the claims are not limited to the members of the embodiments.

The apparatus for manufacturing an optical disk shown in FIGS. 3 to 5 comprises a transport member 3 for transporting a plastic disk body 1 and a disk body 1 transported by the transport member 3.
And a heating unit which heats and presses a central portion of the disk body 1 which is set on the press table 7 and has the clamping plate 2 disposed at the center to connect the clamping plate 2 to the disk body 1. And a press member 5.

The transport member 3 includes an upper and lower base 6 on which the disk main body 1 is set, a transfer member main body 8 to which the upper and lower bases 6 are movably connected, and an upper and lower base 6 for moving the disk main body 1 up and down. And a vertical moving mechanism for setting the press table 7. 3 is a vertical sectional view of the transport member 3, FIG. 4 is a plan view of the transport member 3, and FIG. In the transfer member 3 shown in these figures, the transfer member main body 8 has a disk shape and is connected to the outer periphery so that the upper and lower bases 6 can be moved up and down at regular intervals. The transfer member body 8 shown in FIG.
A pair of upper and lower bases 6 are connected at equal intervals. The rotating member 9 is fixed at the center of the disk-shaped transfer member body 8. Rotating shaft 9
Are mounted vertically via bearings so that they can rotate. Although not shown, a servomotor is connected to the rotating shaft. The servomotor rotates the rotation shaft at an angle of 360/16, and sequentially transfers the upper and lower tables 6 directly above the press table 7.

FIG. 5 shows a state in which the transfer member body 8 connects the upper and lower bases 6. The upper and lower bases 6 shown in this figure are connected to the transfer member body 8 via a guide rod 10 and a linear motion bearing 11 so as to be vertically movable. The linear motion bearing 11 is vertically fixed to the transfer member main body 8. The guide rod 10 movably inserted into the linear motion bearing 11 is vertically fixed to the lower left surface of the upper and lower base 6. The upper and lower bases 6 fix a plurality of guide rods 10 so as not to rotate. Each guide rod 10
It is connected to the transfer member main body 8 via a linear bearing 11. The lower end of the guide rod 10 is fixed to the connection table 12.

The vertical platform 6 is moved up and down by a vertical moving mechanism. The vertical movement mechanism includes a spring 13 for elastically pushing down the upper and lower bases 6 and the wheels 1 connected to the upper and lower bases 6.
4 and a cylindrical cam 15 that pushes up the wheel 14. The spring 13 is provided between the connecting stand 12 and the base for fixing the linear motion bearing 11 so as to push down the connecting base 12 of the upper and lower bases 6. The wheels 14
Protruding from the lower surface of the lens. The cylindrical cam 15
It is arranged on the movement locus of the wheel 14. In this vertical movement mechanism, the wheels 14 move along the cylindrical cam 15 when the transfer member main body 8 is rotated. Therefore, the height of the cylindrical cam 15 can be adjusted to move the vertical platform 6 up and down. When the cylindrical cam 15 is lowered, the upper and lower tables 6 are lowered, and when the cylindrical cam 15 is raised, the upper and lower tables 6 are raised. The upper and lower tables 6 place the disk body 1 on the press table 7 directly above the press table 7. For this reason, the cylindrical cam 15 is located just above the press table 7 and the upper and lower tables 6.
Is lowered, and the upper and lower bases 6 are raised at other portions. In a state where the vertical slider 6 drops, the disk body 1 which has been placed on the vertical slider 6 is moved to the press table 7, is separated from the vertical slider 6.

In FIG. 5, a support portion 6A for supporting the peripheral edge of the disk main body 1 is provided on the right side of the upper and lower bases 6. The support portion 6A is a step portion for supporting the peripheral edge of the disk main body 1. The upper side of the step portion is opened in a circular shape slightly larger than the outer diameter of the disk main body 1, and the lower side is opened in a circular shape slightly smaller than the outer diameter of the disk main body 1. The upper and lower bases 6 of this structure are transported by placing the peripheral edge of the disk body 1 on a circular portion smaller than the disk body 1.

The press table 7 is located at the center of the disk body 1 that has been brought to the position where the clamping plate 2 is connected, and is fixed vertically to the base. The press table 7 has a cylindrical receiving surface 7A on the upper end surface, which is a central portion of the disk main body 1 and supports the lower surface of the welded portion of the clamping plate 2. The cylindrical receiving surface 7 </ b> A is a flat surface having a width capable of supporting the connecting portion of the disk main body 1. Receiving surface 7
At the center of A, there is provided a guide cone 7B inserted into the center hole of the disk body 1. The guide cone 7 </ b> B is inserted into the center hole of the disk main body 1 to accurately position the disk main body 1 at the center of the press table 7. Accordingly, the guide cone 7B has a conical shape tapering toward the upper end, and the disc body 1 is placed on the receiving surface 7A.
Is designed to have an outer diameter that is approximately equal to the center hole. The guide cone 7B is set at the center of the disk main body 1 and is designed to have a height that does not push up the clamping plate 2.

The heating press member 5 connects the clamping plate 2 by ultrasonically oscillating the disk body 1 made of thermoplastic plastic. Therefore, an ultrasonic horn is used for the heating press member 5. As shown in FIG. 2, the pressing surface 5A at the lower end of the heating press member 5 presses the vicinity of the outer periphery of the clamping plate 2 at the center of the disk main body 1 to cause ultrasonic vibration. The pressed plastic of the disk body 1 is heated and crushed as shown by a dashed line, and the clamping plate 2 is connected. However, it is also possible to connect the clamping plate 2 by heating the heating press member 5 with a heater and crushing the disk body 1 without using ultrasonic vibration. The heating press member 5 descends toward the disk body 1 set on the press table 7 and connects the clamping plate 2 to the disk body 1. Therefore, although not shown, the heating press member 5 is connected to the base via a mechanism that can move up and down.

In the optical disk manufacturing apparatus having this structure, the clamping plate 2 is connected to the disk main body 1 in the following steps. The disc main body 1 is set on the support portion 6A of the upper and lower bases 6, and the clamping plate 2 is placed on the center of the disc main body 1. At this time, the rotation of the transfer member main body 8 is stopped. The transfer member body 8 rotates, and the disk body 1
Is transferred to a position directly above the press table 7 and stopped. When the disk body 1 moves right above the press table 7, the upper and lower tables 6
Wheel 14 travels along the cylindrical cam 15, and the cylindrical cam 15 lowers the upper and lower bases 6. When the upper and lower bases 6 are lowered, the disk body 1 placed on the upper and lower bases 6
Moved to The heating press member 5 descends and heats and presses the central portion of the disk main body 1 so that the disk main body 1
Is deformed, and the clamping plate 2 is connected to the center. In this state, the transfer member main body 8 has stopped rotating. Thereafter, the heating press member 5 is raised.
Also at this time, the rotation of the transfer member main body 8 is stopped.
The transfer member body 8 is rotated by 360/16 degrees. When the transfer member body 8 rotates, the upper and lower bases 6 are raised by the cylindrical cam 15, and the disk body 1 is received on the receiving surface 7A.
It is discharged from the press table 7. At this time, the next upper and lower table 6
The disk body 1 set on the press table 7 is carried right above the press table 7. Thereafter, the steps (1) to (4) are repeated to connect the clamping plate 2 to the disk main body 1. At this time, the disk body 1 to which the clamping plate 2 is connected
Is discharged from the upper and lower bases 6 to supply the disk body 1 to which the clamping plate 2 is not connected.

The above embodiment has a structure in which the transfer member main body 8 has a disk shape and a plurality of upper and lower bases 6 are connected thereto. However, the present invention does not specify the shape of the transfer member main body in the structure of the embodiment. As the transfer member main body, any mechanism that can transfer the upper and lower tables directly above the press table while being able to move up and down can be used.

[0019]

According to the optical disk manufacturing apparatus of the present invention, the clamping plate is not connected to the disk main body in a state where the optical disk manufacturing apparatus is mounted on the transport member for transferring the disk main body as in the conventional apparatus. The disk body is transferred from the upper and lower tables for transferring the disk body to the press table, and is pressed by the heating press member while being set on the press table to connect the clamping plate. That is, in the apparatus of the present invention, the disk main body is mounted on the upper and lower bases and transferred, the upper and lower bases are lowered, the disk main body is transferred to the press base, and the disk main body mounted on the press base is heated and pressurized by the heating press member to clamp. Connect the ping plate. In this way, the apparatus of the present invention for connecting the clamping plate to the disc body can fix the press table at an accurate position, and press the heating press member accurately, so that the clamping plate can be precisely attached to the disc body. Can be linked.

Further, the optical disk manufacturing apparatus according to the present invention does not need to position all of a large number of transport members for transporting the disk main body with high accuracy, unlike the conventional apparatus.
There is the feature that the position of the press table and the heating press member can be accurately adjusted, and the clamping plate can be connected to the disk body with extremely high precision. Therefore, the operation of adjusting the connection position of the clamping plate can be significantly simplified. Further, after the positioning of the press table and the heating press member is accurately adjusted, the clamping plate can be connected to all the disk bodies with high accuracy. This also minimizes the displacement of the connection position of the clamping plate due to aging, and realizes the feature that the clamping plate can be accurately connected to the center of the disk body for a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a conventional apparatus for connecting a clamping plate to a disk body.

FIG. 2 is a cross-sectional view showing a state in which a clamping plate is connected to a disk main body.

FIG. 3 is a plan view showing a transport member of the optical disk manufacturing apparatus according to one embodiment of the present invention.

4 is a vertical sectional view of the optical disk manufacturing apparatus shown in FIG.

FIG. 5 is a sectional view showing the vicinity of upper and lower stands of the optical disk manufacturing apparatus shown in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk main body 2 ... Clamping plate 3 ... Conveying member 4 ... Mounting table 5 ... Heat press member 5A ... Pressing surface 6 ... Upper and lower base 6A ... Support part 7 ... Press table 7A ... Receiving surface 7B
... Guide cone 8 ... Transfer member body 9 ... Rotating shaft 10 ... Guide rod 11 ... Linear bearing 12 ... Connecting stand 13 ... Spring 14 ... Wheel 15 ... Cylindrical cam

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 7/26 G11B 23/00 601

Claims (1)

(57) [Claims] An apparatus for manufacturing an optical disk having all of the following configurations. (A) An optical disk manufacturing apparatus includes a transport member (3) for transporting a plastic disk body (1), and a transport member (3).
A press table (7) on which the disk body (1) transferred by (3) is set, and a disk body (1) set on the press table (7) and having a clamping plate (2) disposed at the center And a heating press member (5) for connecting the clamping plate (2) to the disc body (1) by heating and pressing the central portion of the disc. (B) The transport member (3) includes an upper and lower table (6) on which the disk body (1) is set, a transfer member body (8) to which the upper and lower tables (6) are movably connected, and an upper and lower table (6). ) To move the disc main body (1) up and down to set the disc body (1) on the press table (7). (C) The upper and lower bases (6) have a support portion (6A) for supporting the periphery of the disk body (1), and the inside of the support portion (6A) is opened vertically. (D) The press table (7) has a receiving surface (7A) which is a central portion of the disk body (1) and supports a lower surface of a connecting portion of the clamping plate (2). It is fixed to. (E) The heating press member (5) is a clamping plate
It has a pressing surface (5A) for connecting the clamping plate (2) by heating and pressing the disk body (1) on the periphery of (2). (F) The transfer member main body (8) transfers the upper and lower bases (6), moves the disk main body (1) above the press base (7), and the vertical moving mechanism lowers the upper and lower bases (6). The disc body (1) is set on the press table (7), and in this state, the heating press member (5) heats and presses the central portion of the disc body (1), and the clamping plate (2) is moved to the disc body (1). ).