KR960011293B1 - Disk carrying method and apparatus for auto changer - Google Patents

Abstract

The method and apparatus prevents any disk from damage by rolling and carrying a disk when taking it out or in. The device includes a guide rail part of a curved disk rail and a curved holder rail which guides and supports a moving disk, a couple of levers for rolling and carrying a disk along the guide rails from a magazine to a place and a couple of arms for rolling and carrying a disk along guide rails to the center of a carrier or to a magazine.

Description

Disc transfer method of auto changer and its device

1 is a perspective view showing the overall configuration of an auto changer.

2 is a plan view for explaining the disc transfer operation and configuration by the carrier of the auto changer according to the present invention.

3A and 3B are a plan view and a front view showing a lever portion of a carrier according to the present invention.

4A and 4B are a front view and a plan view showing a drive part of the carrier.

4c and 4d are a plan view and a side view showing a state in which the lever drive cam spring is mounted on the axis of the lever drive cam.

5A and 5B show a plan view and a front view of the arm portion of the carrier.

5C and 5D are a plan view and a side view showing a state in which an arm drive cam spring is mounted on the axis of the arm drive cam.

6A and 6B show a plan view and a side view of the disc holder portion of the carrier.

Fig. 6C is a plan view showing an operating state of the disc holder when the disc is transferred to points B and C.

7a and 7b are main parts of the guide rail of the carrier according to the present invention;

8 is a plan view for explaining a conventional disc auto changer moving method.

* Explanation of symbols for main parts of the drawings

2: Magazine 3, 3 ': Regeneration Drive

4: auto changer 10 disc

11: Arm Drive Cam Gear 12: Arm Drive Cam Spring

13: Arm Drive Cam 14: Lever Drive Cam Gear

15: lever drive cam spring 16: lever drive cam

17: disc holder drive cam 25: lever drive motor

25 ': Arm drive motor 35, 35': Lever

39, 39 ': lever connecting plate 48, 49: disc holder

55, 55 ': arm

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier of an auto changer (AUTO CHANGER) for compact discs used in connection with audio and video equipment. In particular, when a disc is transferred to a magazine (MAGAZINE) and a compact disc player in which the disc is stored. A disk conveying method and apparatus therefor for an auto changer for a compact disk for moving the disk circularly by a rolling method.

FIG. 1 is a perspective view showing the overall configuration of the auto changer, in which magazines 2 are mounted on both sides of the main body 1, and the magazine 10 is stored in the magazine.

At the lower end of the magazine, disc reproducing apparatuses 3 and 3 'are mounted, and a carrier 3 for transferring a disc housed in the magazine to a disc reproducing apparatus or a disc which has been reproduced in a disc reproducing apparatus to a magazine is centered. Is mounted on.

In general, four magazines are mounted on both sides, and each magazine holds 45 discs.

The auto changer configured as described above takes the disc out of the magazine 2 while the carrier moves up and down and moves it to the disc reproducing apparatus for playback, or the finished disc is moved back to the magazine and stored in the space formed in the magazine.

The driving scheme for such a conventional auto changer will be clearly described by the plan view of FIG.

Conventional disc auto magazines have magazines 100 installed vertically on both sides at predetermined intervals on the same horizontal line in order to increase the storage capacity of the discs, and spaces formed between these magazines are along the spaces between the magazines. The carrier unit 200 is installed to vertically move up and down to transport the selected disk in a predetermined direction.

In the carrier part, the carrier part 200 is formed in a shape having a surface area including a space between the magazines on both sides and a magazine in order to perform a method of removing the disk from the magazine and reinserting the ejected disk into the magazine. In this surface, the guide surface 201 is formed in a semi-circular shape to allow the disk to be transported to the magazine and the carrier, and the rotating roller 300 is provided at the center of the guide surface so that the disk to be transported along the guide surface is rolled. Push lever (301) and receiving lever (302) having an angle of rotation so as to apply sufficient force at a suitable position to push out the stored disk and a disk located in the carrier to the magazine. Equipped.

In order to transfer the compact disk 400 stored in the magazine to the disk drive mechanism by the disk feeder, the push lever 301 of the carrier part 200 pushes the circumferential surface of the disk to a predetermined position. The rotary roller 300, which is in contact with the circumferential surface of the disk, rotates forward or reverse with an electrical signal to stop the compact disk after moving the compact disk to the center position of the carrier.

The carrier then moves to the compact disc player position, stops and stops.

Thereafter, when the rotary arm rotates in the reverse or forward direction by the electric signal to move the disk to a position close to the magazine and stops, the push lever 301 rising to the guide surface by the electric control signal moves toward the center of the compact player. The disc is moved and playback starts.

After the reproduction is completed, the push lever, the rotation roller, and the storage lever 302 are operated in the same order as the above-described operation sequence, so that the compact disc is collected and stored in the magazine 100.

The conventional disc auto changer is operated in such a way that the push lever and the rotary roller rotate forward and backward, and the control of these forward and reverse rotations is determined by the sensor. The high terminal parts are used, and the number of sensors used for positioning has a disadvantage.

In addition, the friction between the disk and the guide has a disadvantage that the disk is easy to damage.

Accordingly, an object of the present invention is a device having a simple structure when taking out and storing a disc in a magazine or a disc reproducing apparatus, and a disc transfer method of an auto changer which can prevent a disc from being damaged by transferring the disc in a rolling manner, and It is to provide a carrier of the auto changer according.

Carrier of the auto changer according to the present invention for achieving this object is coupled to the lever drive cam and the lever drive cam powered by the lever drive motor to transfer the disc accommodated in the magazine to a predetermined position through a connecting plate A lever portion having a pair of levers which are selectively rotated according to the rotational direction of the lever drive cam to convey the disk by rolling; The arm drive cam powered by the arm drive motor and the arm drive cam and the second arm connected to the arm drive cam to transfer the disc carried by the lever part to the center of the carrier or the disc in the center of the carrier to the magazine. An arm portion coupled through a connecting plate and having a pair of arms selectively rotated in accordance with the rotational direction of the arm drive cam to convey the disk by rolling; The guide rail portion has a curved disc rail and a scatter rail for supporting and guiding the conveyed disk, and the same as the lever drive cam for seating the disk conveyed to the center of the carrier through the guide rail so as to be located at the center. A disk holder portion having a disk holder selectively coupled to a shaft and operatively coupled to the disk holder driving cam to cooperate with the shaft; And a driving unit having power transmission means for transmitting power of the lever driving motor to the lever unit and the disc holder unit, and power transmission means for transmitting power of the arm driving motor to the arm unit.

The carrier of the auto changer according to the present invention having such a configuration transfers a disc stored or seated in a magazine or disc reproducing position to a predetermined position by a lever and simultaneously opens a disc holder, and after the lever operation is completed. By operating the arm to transport the disk to the center of the carrier, the disk holder returns and the disk rests on the carrier.

As described above, when the carrier is moved to the disc reproducing apparatus or the magazine position, the locking of the holder which locks the circumferential surfaces of the disc is released, and the arm is operated so that the disc seated on the carrier is located in the center of the carrier. Or it is transferred to the upper surface of the disc playback apparatus to be seated.

At this time, the edge of the disk is transported by the rolling method along the guide rail can minimize the damage of the disk.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

1 shows the overall configuration of the auto changer.

In the disc auto changer to which the present invention is applied, four magazines (2) of the 45-sheet storage unit are vertically installed on one side, and four magazines of the same type are installed vertically at opposite positions thereof. The space is vertically raised and lowered so that the operation of automatically replacing the disk 10 stored in the magazine or in the drive reproducing apparatus 3 (3 ') of the disk is repeated.

2 is a plan view for explaining the disc transfer operation and configuration by the carrier of the auto changer 4 according to the present invention, Figures 3a and 3b is a plan view and a front view showing the lever portion of the carrier, LEVER DRIVE CAM, a reference numeral 17 denotes a disk holder drive cam, and power is transmitted by a lever drive motor described later as DISK HOLDER DRIVE CAM.

The lever driving cam 16 has two link plates LINK PLATE BIG, that is, a left connecting plate 39 and a right connecting plate 39 'through a connecting pin 41 coupled to the pin hole 410 formed in the lever driving cam. ) Are mounted symmetrically on both sides, and the levers 35, 35 'with the pivot point of the lever pins 34, 34' are rotatably mounted at the front end of each connecting plate.

Each lever is formed in an L shape, and one end is equipped with lever rollers 355 and 355 'contacting the circumferential surface of the disk, and the other ends are lever pins 34 and 34' which act as a point. By means of condensation on the lever brackets 33, 33 'and lever springs 36, 36' with the lever pins 34, 34 'with the levers 35, 35' and the bracket Both ends of the spring are attached to 33 and 33 ', respectively, to provide elastic force in the return directions of the levers 35 and 35'.

In addition, the disc holder drive cam 17 is coupled to the lever drive cam 16 is installed to rotate together.

The disc holder driving cam is provided with a cam protrusion 170 that forms a protrusion having a larger diameter on a portion of the disc to slide the disc holder up and down at both ends of the protrusion.

In this configuration, when the lever drive cam 16 and the disc holder drive cam 17 rotate simultaneously, the left or right connecting plate is selectively horizontally moved in accordance with the rotational direction of the lever drive cam 16 so that the lever is pivoted. At the same time, the cam protrusion 170 rotates in contact with the disk lid and slides the disk holder horizontally in the rotational direction of the disk holder driving cam 17 coupled to the lever driving cam.

Therefore, when the lever drive motor 25 is operated to rotate the lever drive cam and the disc holder drive cam clockwise, the right connecting plate 39 'installed on the right side of the carrier operates, and the lever drive cam and the disc holder drive are operated. When the cam is rotated counterclockwise, the left connecting plate 39 installed on the left side of the carrier is operated so that the levers equipped with the lever rollers 355 and 355 'operate in the magazine direction so that the disc stored therein can be The right disc holder is operated to move to the entrance position B along the horizontal moving line D, and the disc is allowed to enter.

Next, a driving unit for transmitting power to the lever unit and the arm unit will be described with reference to FIGS. 4A to 4C.

4A and 4B are front and plan views showing the driving part of the carrier, and FIGS. 4C and 4D are top and side views showing a state in which the lever drive cam spring 15 is mounted on the axis of the lever drive cam. The drive motor 25 is mounted on the upper surface of the bracket 22 fixed to the upper part of the carrier, and the drive motor pulley is configured to transmit the power of the drive motor to the lever drive cam 16 and the disc holder drive cam 17. 27), the pulley device (PULLEY BLOCK) consisting of the timing belt 28 and the pulley 29, and the power transmission device consisting of the gear 20, (19), (18) and lever drive cam gear (14) These power trains are mounted on the chassis plate 22 of the carrier.

In addition, it is confirmed in FIG. 4c that the lever check sensors S3, S4, and S5 are mounted on the lower end of the lever driving cam gear 14 to detect the operation of the lever.

The lever drive cam 16 and the disc holder drive cam 17 are mounted on the shaft of the lever drive cam gear 14.

A lever drive cam spring 15 is bent between the lever drive cam and the lever drive cam gear so that both ends thereof are collected toward the center thereof, and thus both ends of the spring integrally protrude from the plane of the lever drive cam gear. Resilient contact is made with the side of the stopper 155 'protruding integrally from the plane of the 155 and the lever drive cam.

As shown in FIG. 4C, the lever driving cam spring 15 installed as described above has the rotational force of the lever driving cam spring elastically contacted with the stopper 155 of the lever gear driving cam gear when the lever driving cam gear 14 rotates. It is transmitted to the stopper 155 'of the lever drive cam 16 through 15 so that the lever drive cam 16 is rotated.

The elastic force of the lever drive cam spring 15 is generated by the stopper 155 of the rotating lever gear drive cam gear 14 and transmitted to the lever drive cam 16 through another stopper 155 'in elastic contact. And move to the left and right levers 35 and 35 ', and when these levers are stopped at a predetermined position B, the load generated in the drive portion can be absorbed by the elastic force of the spring.

For example, even if the lever drive cam gear 14 rotates past the stop position by the inertia force when the stopper stops due to the friction caused by the friction between the disc and the magazine and the contact force of the lever, Since the load is buffered in the lever drive cam spring 15, it protects the disk and the mechanism and facilitates motor control.

When the drive of the motor is stopped by the sensor when the disk transfer is completed, the lever drive cam spring 15 adds its restoring force to the stopper of the left and right lever drive cams in contact with it to facilitate the movement of the disc. do.

The arm drive motor 25 ′ shown in FIG. 2 is the same as the lever drive motor 25 described above with the arm drive cam gear through the pulley device and the gears 20 ′, 19 ′, and 18 ′. 11), and the arm drive cam, which will be described later, is mounted on the shaft of the arm drive cam gear.

Next, as shown in FIG. 2, the arm portion for transferring the disk conveyed to the point B by the lever to the center C of the carrier or the disk at the center C of the carrier to the magazine is shown in FIGS. It demonstrates with reference to FIG. 5d.

5A and 5B are plan and front views showing the arm portion of the carrier, and FIGS. 5C and 5D are plan and side views showing the arm drive cam spring 12 mounted on the axis of the arm drive cam.

The power transmitted from the arm driving motor 25 ′ of the driving unit described above is transmitted to the arm driving cam gear 11, and the arm driving cam 13 is mounted to the shaft of the arm driving cam gear and the arm driving cam and the arm. An arm drive cam spring 12 is mounted between the drive cam gears.

The arm driving cam 13 is mounted on the lower surface of the arm frame bracket 43, and the cam frame hole 432 having a cam hole shape is formed in the arm frame bracket with a width in which a circular cam hole 131 is exposed.

The arm drive cam 13 is symmetrically mounted with two first arm connecting plates 61 and 61 ', and is provided at one end of the first arm connecting plates 61 and 61'. Cam hole pins 611 and 611 'are formed to couple the first arm connecting plate to the cam hole 131, respectively, and the other end of the cam hole pins 611 and 611' is provided with respect to each of the first arm connecting plates 61 and 61 '. In the state having an angle, the second arm connecting plates 62 and 62 'are rotatably coupled to the seesaw SESEAW.

The second arm connecting plate is prevented so that unnecessary rotation is limited by the arm stoppers 431 and 431 'respectively formed in the arm frame briquette 43, respectively.

In addition, the ends of each of the non-joined opposite positions of the second arm connecting plate hang on both ends of the coil spring 58 so that the second arm connecting plates are brought back to the drum and the other start of the second arm connecting plates. At the end of the arm frame briquette 43, the left and right arms 55 and 55 ', which rotate clockwise and counterclockwise, form a link connection with the fastening elements, and the left and right arms 55 thereof. At the free end of the arm 55 'arm, arm rollers 57 and 57', which come into contact with the information recording medium, are mounted.

The arm rollers 57 and 57 'are selectively rotated by the arm drive cam 13 according to the rotation direction by such a structure.

That is, when the arm drive cam rotates in the clockwise direction, the arm roller 57 'rotates counterclockwise as indicated by the dotted line in FIG. 5a to transfer the disc from the point B to the point, and the arm drive in the counterclockwise direction. When the cam rotates, the arm roller 57 rotates clockwise.

As described above, the arm driving cam spring 12 is mounted between the arm driving cam 13 and the arm driving cam gear 11, and the spring is provided with a stopper 122 and an arm formed at the arm driving cam gear 11. Resilient contact with the stopper 122 'formed on the drive cam.

In addition, an arm check sensor 56, 57, 58 for detecting the operation of the arm is mounted on the lower end of the arm drive cam gear (11).

When the arm drive cam gear 11 is operated, the arm drive cam is rotated by the arm drive cam spring 12, as shown in FIG. 5C, and the left and right arms 55 are driven by the elastic force of the arm drive cam spring. ) And 55 'are stopped at the predetermined position (C), the load generated in the drive unit is eliminated.

For example, even if the arm drive cam gear 13 rotates past the stop position by the inertia force when the stopper stops due to the load caused by the friction force of the disc and the magazine and the contact force of the arm, or when the stopper stops due to the completion of the operation, Since the applied load is buffered in the arm drive cam spring 12, the disk and the mechanism are protected and the motor control is easy.

When the drive of the motor is stopped by the sensor when the disk transfer is completed, the arm drive cam spring 12 adds its restoring force to the stopper of the left and right arm drive cams in contact with it to facilitate the movement of the disc. do.

Next, the disc holder portion will be described in detail with reference to FIGS. 6A and 6B.

6A and 6B are a plan view and a side view showing a disc holder portion of a carrier, and FIG. 6C is a plan view showing an operating state of the disc unfolded when the disc is conveyed to B and C points.

As shown in FIG. 4A, the lever drive cam 16 and the disc holder drive cam 17 are mounted on the shaft of the lever drive cam gear 14 that receives power from the drive motor 25. The drive cam 17 is mounted with two disc holders 48, 49 symmetrically.

Each of the disc holders 48 and 49 has two slots 46 'formed therein so as to be slidable with a predetermined stroke with respect to the horizontal surface of the arm frame bracket 43. Each fixing pin 46 is inserted to guide the movement of the disc holder.

In addition, tip portions 480 and 490 are formed at the tip of each disc holder to contact the disc to hold the disc, which is transferred to the center of the carrier, to hold the disc in place, and the tip of the disc holder is arm frame bracketed. It protrudes to the position which can contact the circumferential surface of a disk through the through-hole 43 'formed in 43. As shown in FIG.

Each disc holder is also equipped with holder springs 50, 50 'for returning to the position of the moved disc holder.

The disc holder configured as described above selectively moves the disc holders at both sides according to the rotation of the disc holder drive cam 17.

Referring to FIG. 6C, when the disc accommodated in the magazine is transferred to the point B by the lever of the lever drive cam, the lever drive cam 17 operates clockwise to lower the disc holder 48. By moving the disc, the disc is transported to allow entry to point B.

The disk conveyed to the point B is conveyed to the point C by the arm roller as described in FIG. 5A. At this time, the disk conveyed to the point C is prevented from being separated by the disk holder 49 and at the same time the disk holder 48 Moving upwards, the disk is positioned in the center of the carrier and pushed to seat.

Next, the guide rail unit according to the present invention will be described in detail with reference to FIGS. 7A and 7B.

7A and 7B are a plan view and a side view showing the guide rail portion of the carrier.

As shown in FIGS. 7A and 7B, the upper disk rail 51 and the lower disk rail 51 ′ are formed in a curved line having a predetermined curvature, and a portion in contact with the conveyed disk has a taper TAPER. Combined to form.

A holder rail coupled to the upper holder rail 52 and the lower holder rail 52 'with a predetermined distance from the upper and lower disk rails is mounted, and the upper holder rail 52 and the lower holder rail 52' are mounted. It is formed in a curve having the same or similar curvature as that of the disk rail, and is formed to have an inflection point at both ends of the rail, and the portions that the disk contacts are joined to form a taper.

As such, by forming each of the rails to have a taper, both sides of the disk may be in line contact during the disk transfer, thereby reducing the load and minimizing the damage of the disk.

In addition, a lower portion of the disk rail is provided with a printed circuit board (hereinafter referred to as a PCB: 70) is equipped with a disk check sensor S9, S10, S11 for detecting the disk transferred to the point B and C point. .

The PCB 70 is installed on the upper surface of the front end position of the lower disk rail 51 'and detects the exact position of the disk passing between the upper and lower disk rails 51, 51', and as a result The electrical signal required for the next operation is sent to the commander.

Referring to the disc transfer operation by the carrier of the present invention configured as described above are as follows.

First, with reference to Figure 2 will be described the operation of transferring the disk from the right magazine to the carrier center (C).

This operation is the same as moving the disc from the right compact disc player to the center of the carrier, and moving the disc from the left magazine (A) to the center of the carrier (C) or from the left compact disc player to the center of the carrier is performed by the motor. It is achieved by driving the rotational direction in reverse, as well as the operating state, the effect is also the same.

As shown in FIG. 4A, the power of the lever drive motor 25 is composed of a motor pulley 27, a time belt 28 and a drive pulley 29 and a pulley device and gears 20, 19 and 18. When the lever drive cam 16 and the disc holder drive cam 17 are rotated in the clockwise direction, the disc holder drive cam is moved downward while the right disc holder 48 is rotated. With the downward movement of the right disc holder 48, the lever drive cam 16 moves the right connecting plate 39 to rotate the right lever 35 'to roll the disc stored in the right magazine by the B position. Transfer to.

In this case, as shown in FIG. 4C, when the signals of the lever check sensors 53, 54, and 55 are changed from off, on, off to on, on off at the home position, respectively, the lever driving motor 25 stops. do.

This position is the position at which the disk check sensor S11 detects the disk (on off).

After the lever drive motor 25 stops, the power of the arm drive motor 25 'is transmitted to the arm drive cam 13, and when the arm drive cam is rotated clockwise, the arm drive cam 13 rotates. As shown in FIG. 5A, the left first arm connecting plate 61 is moved to rotate the arm 55 'about the O point to push the disk to be transported by rolling the B from the B position to the center of the carrier.

At this time, as shown in FIG. 2, when the signals of the disk check sensors S11, S10, and S9 change from off, on, on to on, off, and on, the arm drive motor 25 'stops.

After the arm drive motor 25 'stops, the lever drive motor 25 rotates the lever drive cam 16 and the disc holder drive cam 17 counterclockwise to rotate the lever 35' and the right disc. The holder 48 is moved to the home position.

After the home position sensor S2 mounted at the bottom of the home position of the lever is detected as on to off, the lever check sensors S3, S4, and S5 as shown in FIG. 4C are on, on, off to off, on, on pro. When changed, the lever drive motor 25 stops.

In addition, the right disk holder 48 is pushed back to the home position so that the disk is located at the center of the carrier, so that the left and right disk holders are supported in both directions to hold the disk in position.

After the lever drive motor 25 stops, the arm drive cam 16 is rotated counterclockwise by the arm drive motor 25 ', and as shown in FIG. 5C, the arm check sensors S6, S7, and S8 are shown. The arm drive motor 25 'stops when it is switched off, on and off in this home position.

When the operation as described above is completed, the disk is located at the center of the carrier and moves the carrier in the up and down direction according to the command of the commander.

Up to now, the operation of transferring the disc to the center of the carrier in the left and right magazines and the left and right compact disc players has been described, and the following describes the operation of transferring the disc from the center of the carrier to the left and right magazines and the left and right compact disc players.

Transferring the disc located in the center of the carrier to the right magazine is the same as transferring the disc from the center of the carrier to the right compact disc player. Transferring the disc from the center of the carrier to the left magazine and the left compact disc player is the rotation of the motor. This is achieved by driving in the opposite direction, and the operating state is the same.

Therefore, the operation of transferring the disc from the carrier center to the right magazine is described here.

When the lever drive cam 16 and the disc holder drive cam 17 are rotated clockwise by the lever drive motor 25, the disc holder drive cam 17 is rotated to move the right disc holder 48 downward. With the downward movement operation of the right disc holder, the lever drive cam 16 moves the right connecting plate 39 'so that the right lever 35' is rotated.

The right lever stops when the lever home position sensor 52 changes from the home position to the D position, that is, the signal of the sensor changes from off to on.

After the lever drive motor stops, the arm drive cam 16 is rotated by the arm drive motor 25 'to rotate the left arm, and the arm rotates to point P to push the disc from the center of the carrier to the right magazine. .

As shown in FIG. 5C, when the arm check sensors S6, S7, and S8 change from off, on, off to on, on, off, the arm drive motor 25 'stops.

After the arm drive motor stops, the lever drive motor 25 and the arm drive motor are rotated in opposite directions to return the lever, the disc holder and the arm to the home position.

After the mechanism returns to the home position, the carrier moves in the up and down direction according to the command of the commander.

The carrier of the auto changer according to the present invention having such a configuration can minimize the damage of the disk by transferring the disk by the rolling method as a simple structure, and can easily and accurately control the position of the disk even using a small number of sensors. Can be.

Claims (17)

Disc transfer mechanism of the auto changer having a forward drive step of rolling the discs stored in the auto changer or a disc housed in the magazine to the center of the carrier and a reverse transfer step of transferring the disc in the center of the carrier to the disc drive mechanism or the magazine A method comprising the steps of: conveying a disc driven mechanism or a disc housed in a magazine to a predetermined position (B) by a lever; and moving the disc transferred to a predetermined position by an acute angle range of the arm located in the disc moving direction. Forward step of conveying to the center (C) of the; When the lever placed in the center (C) of the carrier to the opposite position of the arm reaches a predetermined position (D), the disc is transferred to the disc reproducing apparatus or magazine side by moving the obtuse angle of the arm of the auto changer Disc transfer method. In a carrier of an auto changer for transferring a plurality of discs by rolling a magazine to a player for reproducing a disc and a player for reproducing the disc, a lever which is powered by a lever driving motor to transfer a disc stored in the magazine to a predetermined position. A lever portion having a pair of levers coupled to the drive cam and the lever drive cam, respectively, and having a pair of levers which are selectively rotated according to the rotational direction of the lever drive cam to convey the disc; The arm drive cam powered by the arm drive motor and the arm drive cam and the second arm connected to the arm drive cam to transfer the disc carried by the lever part to the center of the carrier or the disc in the center of the carrier to the magazine. Arm portions each having a pair of arms coupled to each other via a connecting plate and selectively rotated according to a rotational direction of the arm driving cam to convey a disk; A guide rail portion having a curved disk rail and a holder rail for supporting and guiding the conveyed disk; A disk having a disk holder selectively operated in accordance with the rotational direction of the disk holder drive cam coupled to the same axis and interlocked with the lever drive cam to seat the disk transported to the center of the carrier through the guide rail portion to be located in the center An auto changer including a holder portion, a power transmission means for transmitting power of a lever drive motor to the lever portion and a disc holder portion, and a power transmission means for transmitting power of an arm driving motor to the arm portion. Disc feeder. According to claim 2, wherein the disc rail of the guide rail portion of the upper disk rail and the lower disk rail is formed to be coupled to the tapered portion to be in contact with the conveying disk, the holder rail of the guide rail portion is in contact with the conveyed disk The disc transfer device of the auto changer, characterized in that the upper holder rail and the lower holder rail is coupled to form a tapered portion. The disk of the auto changer according to claim 2, wherein the lever of the lever part is formed in an L-shape, one end of which is connected to the bracket by a pin so as to be rotatable, and a roller is mounted on the other end of the roller which is in contact with the disk. Conveying device. According to claim 2, wherein the first arm connecting plate and the second arm connecting plate of the arm portion rotatably have a predetermined angle and are respectively coupled to the arm drive cam and the non-joined end of the second arm connecting plate is connected by a mutual spring. Disc transfer device of the auto changer, characterized in that coupled. 3. The disc transfer device of the auto changer according to claim 2, wherein a tip portion is formed at each tip of the disc holder, and the tip portion protrudes through a through hole on an arm frame bracket. The lever drive cam gear (14) according to claim 2, wherein a power transmission means for transmitting the power of the lever drive motor to the lever portion and the disc holder portion is mounted on a shaft coupled with the lever drive cam and the disc holder drive cam. Disc feeder of auto changer which consists of pulley and gear (20), (19), (18). According to claim 2, wherein the power transmission means for transmitting the power of the arm drive motor to the arm drive cam gear 11, the pulley device and gear 20 'mounted on the same shaft as the arm drive cam (20'), ( 19 '), (18') disk changer of the auto changer. The transfer device of claim 3, wherein the holder rail has a curved shape having an inflection point at both ends thereof. The disk transfer apparatus of the auto changer according to claim 3, wherein sensors S9, S10, and S11 for detecting a disk are mounted on a lower end of the disk rail. The disk transfer apparatus of the auto changer according to claim 10, wherein the sensors (S9, S10, S11) are mounted on a PCB (70) which is installed on an upper surface of the front end position of the lower disk rail (51 '). The disk transfer apparatus of claim 5, wherein the right and left arms respectively coupled to the second arm connecting plate are coupled to cross each other. 13. The disc transfer device of the auto changer according to claim 12, wherein rollers are mounted at ends of the right and left arms contacting the disc, respectively. 8. The disk transfer apparatus of claim 7, wherein a spring is mounted between the lever drive cams, the spring being supported by a stopper formed on the lever drive cam gear and a stopper formed on the lever drive cam. 15. The disk transfer of the auto changer according to claim 14, wherein a stopper is formed on a surface facing the lever drive cam gear and the lever drive cam, respectively, and the stopper is pressurized by a spring so as to be arranged side by side in contact with both ends of the spring. Device. 9. The disk transfer apparatus of claim 8, wherein a spring is mounted between the arm drive cam gear and the arm drive cam, the spring being supported by a stopper formed on the arm drive cam gear and a stopper formed on the arm drive cam. 17. The disk transfer of the auto changer according to claim 16, wherein a stopper is formed on a surface facing the arm drive cam gear and the arm drive cam, and the stopper is pressurized by a spring so that the springs are placed in parallel with each other in contact with each other. Device.