JPS6138539B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for selecting a desired video disc from among a large number of video discs stored in a rack made of multi-tiered shelves that can be moved forward and backward, and automatically loading the video disc into a player. This invention relates to an auto-changer device for video discs, which replays the video and audio, and returns the disc to its original rack once it is finished.

Currently, various methods are used for video discs, among which the so-called TED method is used.
A thin sheet disk made of vinyl chloride with a diameter of 21 cm and a thickness of 0.1 mm is used. The signal groove cut into the disk has a width of several μm and a depth of about 1 μm. Furthermore, the pick-up is constructed by directly connecting a piezoelectric element to the base of a sled-shaped diamond needle. When the disk is rotated at high speed (usually 180 rpm) on a fixed table, an air layer is created between the table and the disk as an air action. As the disk rotates, the unevenness in the signal groove is sequentially released from the tip of the needle, and the piezoelectric element converts the pressure change into an electrical signal to obtain a video signal.

However, if you want to store a large number of such video discs and configure an autochanger using coins to automatically select and play the desired video disc, you can use conventionally known audio jack boxes or Auto changer cannot be used as is. This is because in an audio jackbox, when a target disc is selected, a player such as a turntable or pickup moves to that position and the disc is placed on top of it. However, the signal groove for video discs is an order of magnitude narrower than that for audio discs, and requires unimaginable precision in moving the pick-up, loading the disc, starting the pick-up position, etc. Therefore, it is desirable that the player part of a video disc should not be moved as much as possible. Furthermore, since the video disk is a thin sheet, the method used for audio, in which the disk is moved by holding the periphery from both sides, cannot be used.

In addition, the auto changer for audio is
When one disk finishes playing, the pick-up moves to the side, the next disk falls onto the turntable, and the pick-up rides on the signal groove again, repeating the process. However, since video disks are floated on a fixed table and rotated while forming an air action, the above-mentioned method for audio, in which disks are stacked one after another on a turntable and rotated, cannot be used.

Therefore, the present applicant aims to obtain a device that reliably selects and installs a target disk and restores it, using a completely different idea from conventional audio autochangers, and We have already proposed something that aims to be as compact as possible and still be able to accommodate a large number of disks.

It consists of a storage means that stores discs one by one in a rack consisting of multiple shelves and whose position can be selectively controlled by vertical movement, and a play means that is fixedly provided facing the storage means. and a conveyance means which is provided between the storage means and the play means, and which selects a target disc, sends it to the play means, and returns it after the play is completed.

The storage means is formed by stacking a plurality of shelf boards horizontally at regular intervals to form a rack, which is movable up and down by a motor, and one end of which is provided with an optical position detection device. And on the rack shelf,
It has a structure in which disks are stored one by one with the signal groove facing upward.

The playing means is provided on the opening side of the rack, and includes a fixed table on which the disk is placed, a disk holder that fixes the disk to a turntable connected to a drive motor, a pick-up whose movement speed and approach and separation from the disk are controlled, and the like. It has a structure that has

The conveyance means includes a lever that pushes out the disk from the side opposite to the opening side (rear end) of the rack when it is carried in, a roller that sucks the pushed out disk and sends it out to the play means and pulls it back from the play means after play is finished, and a roller that is pulled back. This structure includes a lever for pushing the loaded disk to a predetermined position on the rack.

However, in the present invention, among the playing means,
In particular, this relates to automatic feeders for pick-ups. Movement of the pick-up from the stop position to the play position is carried out by a fast-forward play motor, and movement from the play position during play is switched to the disk drive motor for proper synchronization. After the play is finished, the play motor for fast forwarding is used to return the player to the original position at high speed.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a board, and on the right side of the board 1 in the figure is a storage means 4 mainly consisting of a rack 3 storing a plurality of video disks 2 in multiple stages.
A selection and sending means 5 is provided for selecting and sending out a target disk 2 from the storage means 4. Further, on the left side of the board 1 in the figure, there is provided a playing means 9 consisting of a disk 2 device, a rotating device 6, and an automatic feed device 8 for a pickup 7. Further, between the storage means 4 and the play means 9, there is provided a conveyance means 10 for reciprocating the disk 2 between the storage means 4 and the play means 9.

As shown in FIG. 3, the storage means 4 has side plates 11,
11, a top plate 12 and a bottom plate 13 form a rack 3,
The top plate 12 is provided with a handle 15 on the top surface so as to be portable, and the inner surfaces of the both side plates 11, 11 are provided with a large number of horizontal storage grooves 16, 1 at regular intervals.
6 is formed. Furthermore, positioning protrusions 17 are provided at three locations on the lower surface of the bottom plate 13 as shown in FIG.
is provided, and a fixing screw hole 18 is bored approximately in the center as shown in FIG. Arms 19 and 1 are provided at both front ends of the top plate 12 and the bottom plate 13, respectively.
9, 20, 20 are rotatably provided, and vertical push bars 21, 22 are provided at the ends thereof, and connecting rods 23, 24 are rotatably mounted on the shafts. The tip of the guide boss 26 is inserted into the guide slot 25 provided in the top plate 12.
The push bars 21 and 22 are always drawn toward the front side by the spring 27, and the push bars 21 and 22 are open.

The shelf board 28, which is slidably inserted into the storage grooves 16, 16, is made by bending a lightweight metal plate such as aluminum, as shown in FIG. 29, 29, and stoppers 30, 30 are formed in the front part, and a notch 31 for loading and unloading the disk 2 is formed in the center of the front edge,
At the rear edge, there is an extraction part 32 that also serves as reinforcement, and in the central plane, protrusions 33, 33 for stopping the disk 2 are provided.

Next, to explain the selective sending means 5, a downward-facing support column 34 is provided on one side of the substrate 1.
to plant. A horizontal elevating plate 35 is provided on the inside of this support 34 as shown in FIG. 2, and a weight 36 is provided on the outside for balance as shown in FIG. 1, and a weight 36 is provided on the outside as shown in FIG. They are connected to each other by a suspension string 37 via pulleys 38, 38 on the upper part of the support column 34.
As shown in FIG. 7, positioning holes 39 are provided at three locations in the center of the elevating plate 35, and a thumbscrew 40 is provided approximately at the center protruding from the bottom surface. The lift motor 42 as shown in FIG. 2, which is provided on the upper part of the housing, is screwed into a vertical screw shaft 43 via a coupler. In order to smoothly raise and lower the elevator plate 35, guide plates 44 and 4 are provided on both sides of the base end of the elevator plate 35.
4, and these guide plates 44, 44 are provided with two rollers 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
45, and two rollers 46, 46 for maintaining horizontality on the left and right sides, and are adapted to roll along the vertical groove 47 inside the support column 34.
Further, the support column 34 is provided with an address detection device 48 for detecting the vertical position of the rack 3. This address detection device 48 consists of a perforated plate 49 mounted vertically on the elevating plate 35 and a signal output section 50 from the perforated plate 49, which is integrally fixed to the side surface of the column 34. This signal output section 50 is
A light emitting element 51 is provided on one side and a plurality of light receiving elements 52 are provided on the other side so as to sandwich the perforated plate 49. The perforated plate 49 is provided with 8-bit holes 49 _{1 .} . . 49 ₈ for address setting, and a hole 49 ₉ for accurate positioning. Of these, each of the 8-bit holes 49 ₁ ... 49 ₈ has a light receiving element 52 .
₁ ... ₅₂₈ are provided, and two light receiving elements ₅₂₉ and ₅₂₁₀ are provided in the other holes ₄₉₉ , superposed vertically.

A motor 53 for pushing out the disk is provided near the pillar 34. This motor 53 is
It is transmitted via a belt to a pulley 54 on the lower surface of the substrate 1, and a partial gear 57 and a cam 58 are mounted on the same shaft 56 as the pulley 54. Moreover, shafts 59 and 60 are provided on both sides of these, respectively, and these shafts 59 and 60 pass through the substrate 1, and
The elevating plate 35 also passes through and protrudes to the upper part of the support column 34. The shafts 59 and 60 have gears 6, respectively.
1 and 62 are provided, and two protrusions 63, 63, 64, and 64 are provided that contact the cam 58, and swing arms 65 and 66 are fixed to the upper and lower ends of the shafts 59 and 60, respectively. , the tips of the swinging arms 65, 66 are arranged in arcuate holes 67, 6.
8 and are connected by connecting rods 69 and 70. A dogleg-shaped pushing lever 71 is provided in the middle of one of the connecting rods 69 so as to face the rear edge 32 of the shelf board 28, and a dogleg-shaped pushing lever 71 is provided in the middle of the other connecting rod 70. The lever 72 is connected to the rack 3.
It is provided facing the arm 19 of. Furthermore, a stationary first switch 73, a reversing switch 74, and a stationary second switch 75 are provided at the swing positions of the swing arms 65, 66 at the lower ends.

Next, to explain the playing means, a disk drive motor 76 is mounted approximately in the center on the left side of the board 1 in FIG. 1, as shown in FIG. 13, with a drive shaft 77 facing upward. A turntable 78, which is extremely small compared to the diameter of the disk 2, is attached to the upper end. A fixed table 80 having approximately the same diameter as the disk 2 is provided around the outer periphery of the turntable 78 and has a gap 79 for air to flow in. This fixed table 80
The ridge line scanned by the stylus 81 of the pick-up 7, which will be described later, is horizontal, and both sides perpendicular to the ridge line are slightly inclined, forming a so-called saddle shape. A stabilizer 82 slightly protruding approximately in the shape of a cross is integrally formed on the upper surface of the fixed table 80 in order to obtain stable air action.

Above the turntable 78, a rotatable disk holder 83 is provided on the bottom surface of the tip of a vertically movable support plate 84, and the magnet of this holder 83 is attracted to the upper surface fitting hole of the turntable 78. It is designed to hold disk 2. The base end of the support plate 84 is rotatably provided, and the support plate 84 can be moved up and down by a reciprocating rod 85, which will be described later.

Three parallel guide rods 86, 87, and 88 are provided above the fixed table 80, and the first guide rod 86 is slidably engaged with the pick-up 7. A stylus 81 is provided at the tip. This pick up 7
The stylus 81 is swingably provided around the first guide rod 86 as a fulcrum so that the stylus 81 approaches and separates from the disk 2, and includes pulleys 89 and 90 at both ends and a pulley 91 in the middle.
It is designed to be reciprocated by a string 92 wound around.

Next, reference numeral 93 in FIG. 1 is a play motor for fast-forwarding the pick-up 7, etc., and this motor 93 is transmitted to a pulley 97 of a worm shaft 96 by a pulley 94 and a belt 95. This worm shaft 96 is provided to be swingable in a horizontal plane about a fulcrum 98, and a worm 99 is integrally formed in the middle, and a spring 101 is connected to a loosely fitting member 100 in the middle to provide suction in one direction. has been done. This spring 101
A solenoid 102 is provided to suck the worm 99 to the opposite side against the
A plunger 103 of No. 02 is adapted to attract the loose fitting member 101 to the opposite side via a link 104. A small-diameter play portion 105 and a screw thread 106 are formed at the further end of the worm shaft 96, and are screwed into a nut 109 engaged with a long hole 108 of an arm 107. The arm 107
is swingably provided around a fulcrum 110, and two switches 111 and 112, which are opened and closed by this arm 107, are provided.

As shown in FIGS. 1 and 12, a rotating body 184 is provided on the vertical shaft 113 facing the worm shaft 96, and this rotating body 184
Gear 114, the disk holder actuating cam 11
5. In addition to the cam 116 for operating the polishing motor, the lower surface is comprised of a positioning protrusion 185 and a stepped portion 186 for unlocking a sliding plate 124, which will be described later, when the unlocking is not activated. Of these, gear 11
4 consists of a worm wheel with a center angle of about 190 degrees, which approaches and separates from the worm 99, and this gear 1
Two operating pieces 117, 118 provided on the top surface of 14
However, two switches 119 and 12 installed on the outer periphery
0 is controlled to open and close, respectively. Facing the disk holder actuating cam 115,
A swinging piece 122 centered on a fulcrum 121 is provided, and a reciprocating roller connected to the disk holder support plate 84 is provided so that a roller 187 provided on the swinging piece 122 is attracted by the weight of the disk holder 83. Rod 8
5 are combined. Also, the fulcrum 1 of the swing plate 122 is placed facing the polishing motor operating cam 116.
An actuating plate 188 is provided which is concentric with 21 and swings separately, the other end of which is attracted by a spring 189 and a polishing motor operating switch 190.
is provided.

A sliding plate 1 is located at the bottom of the arm 107.
24 is provided so as to be reciprocally movable through a long hole 125 and a pin 126, and is attracted in one direction by a spring 127. An engagement piece 128 provided integrally with the sliding plate 124 is adapted to be pressed by one end 129 of the arm 107 against the spring 127, and when the engaging piece 128 is moved to a predetermined position, the sliding plate A hook piece 191 integrated with 124 is locked by a locking plate 130. As shown in FIG. 15, this lock plate 130 is rotatable around a fulcrum 192, and when it is sucked by a spring 193 at one end, a lock portion 194 is locked to the hook 191. . Further, on the upper surface of this lock plate 130, the arm 107
A protrusion 196 is provided for releasing the lock when the inclined plate 195 enters, and the rotating body 184
A tongue piece 197 is provided to release the lock by being pushed by the emergency step 186 on the lower surface of the lock. A worm shaft 131 is also connected to the sliding plate 124 by a ball joint, and an operating plate 132 for swinging the pickup is integrally provided. A worm 133 is integrally provided in the middle of the worm shaft 131, and its tip meshes with the disk drive motor 76 via a speed change gear.
That is, as shown in FIG. 12, a worm 198 is provided on the shaft 77 of the disk drive motor 76,
This worm 198 is connected to a gear 20 integrated with a shaft 199.
0, this shaft 199 and the worm shaft 13
1 and the gear 2 of the worm shaft 131, which fit loosely into each other.
01 and the gear 202 of the shaft 199 mesh with double face gears 203 and 204.

Also, a shaft 139 provided facing the worm 133
Large and small gears 140, 141, a cam 205, and the pulley 91 are fixedly provided on the mount. The large gear 140 meshes with the worm 133 in a manner that allows it to move toward and away from the worm 133, and the small gear 141 meshes with the gear 114. Approximately 65 for cam 205
Two concave portions 206, 206 are formed at an interval of 100 degrees, and a leaf spring 207 having a V-shaped tip is in contact with the plate spring 207. It is pressed by a protrusion 185 on the lower surface of 184 for accurate positioning. The tip of the operating plate 132 for swinging the pick-up engages with a protrusion 142 eccentrically provided at the tip of the first guide rod 86. In addition, a polishing plate 143 is located near the fixed table 80.
is connected to a polishing motor 144 on the lower surface.

Next, in the bottom view of the play means 9 shown in FIG. 14, a first swing plate 145 is connected to the shaft 136. A projecting piece 210 integrally provided above the first swing plate 145 passes through a hole 211 in the substrate 1, and an engagement hole 2 bored in the sliding plate 124.
12, and by the movement of the sliding plate 124, the first
A swing plate 145 is designed to swing around a shaft 136. Also, a switch 146 is provided facing the tip of the first swing plate 145, and
It is coupled to a second rocking plate 148 via a connecting rod 147. This second swing plate 148 has a fulcrum 149
It is swingable around the center, is constantly attracted by a spring 150, and is connected to one end of a brake plate 151 of the disk drive motor 76. The other end of this brake plate 151 is fixed to the substrate 1.

Next, the conveying means 10 will be described. A letter-shaped notch 152 is provided in a part of the disk loading/unloading end of the fixed table 80, into which a roller support frame 153 is loosely fitted. Rollers 154, 155 made of rubber or the like are provided at both ends of this support frame 153 so as to be rotated by a roller motor 170 via a belt 171 and pulleys 172, 173, 174.
Suction pipes 158 and 159 are connected to the attachment chambers 156 and 157, respectively, and are coupled to an air suction motor 160, which will be described later.
The support frame 153 is fixed to a swingable inverted L-shaped support plate 163 with one point on the support base 161 as a fulcrum 162, and the lower end of this support plate 163 is connected to the solenoid 16.
4 plunger 165. The roller support frame 153 is lifted slightly above the fixed table 80 when the disc 2 is carried in and carried out, and is slightly lower than the fixed table 80 during play. On the outer periphery of the fixed table 80 located on one side of the support frame 153, a stopper 166 is provided that is inclined on the rack 3 side and is approximately vertical on the fixed table 80 side to prevent the loaded disk 2 from bouncing back. ing. In addition, the roller support frame 15
On the side of 3 and on the loading side of the fixed table 80, there is a first light-emitting element and a light-receiving element.
Second position sensors 167 and 168 are provided at the farthest position from the loading side of the fixed table 80.
A third position sensor 169 is provided.

Next, the control circuit will be explained based on FIG. 18. 175 is a central processing unit (hereinafter referred to as CPU);
176 is a C-MOS RAM (Random Access Memory) or non-volatile RAM (hereinafter simply RAM) that stores coin counts, number of plays, number of times of polishing, etc.
). Further, 93 is a play motor for fast forwarding the pick-up, etc., 160 is an air suction motor for disc suction, 53 is a motor for pushing out and pushing the disc, 170 is a roller drive motor for loading and unloading the disc, and 42 is a motor for easy lifting. , 177 is a coin box for outputting a coin detection signal, 178 is a keyboard for disk selection, 144 is a stylus polishing motor, and 76 is a disk drive motor.

179 is a printer, 180 is a pre-stored program ROM (read only memory), 181
1 is an input coin indicator, 182 is a play indicator consisting of a light emitting diode, 48 is an address detection device, 183 is a disk end signal detection circuit, 1
67, 168 are the first and second disk loading/unloading controls.
The position sensor 169 is also the third position sensor 1
19 is a first dial set switch circuit; 12
0 is the second dial set switch circuit, 164
102 is a play control solenoid, 75 is a stationary second switch, and 73 is a stationary first switch.

Next, the operation of the present invention will be explained based on the flowchart of FIG. 19.

A disk 2 is placed in the rack 3 constituting the storage means 4.
The shelf boards 28 carrying the materials are stored in the storage groove 16 in a predetermined order. And the positioning hole 39 on the elevating plate 35
Place it so that the positioning protrusion 17 engages with the
Thread the thumbscrew 40 into the screw hole 18 from below and secure it.

Now turn on the power and insert a coin.
``Do you have coins?'' becomes YES, and an input signal is sent from the coin box 177 to the CPU 175.
Next, when disk 2 is selected using the keyboard 178, the question ``Select music?'' becomes YES, and the signal is sent to the CPU 175. With this selection signal
The coin counter in the RAM 176 is subtracted by 1, and the address signal from the address detection device 48 is sent to the play display 182, which lights up a predetermined position. At the same time, an address signal is sent to the OPU 175, and this CPU 175 compares the address detection signal with the signal of the RAM 176. If "Is the lifting motor down?" is YES, this lifting motor 4
2 rotates forward, and NO rotates reversely. Here, address signals are sequentially inputted from the address holes 49 ₁ to 49 ₈ , and when the target position of the disk 2 is reached, the address holes 49 ₁ to 49 ₈ are first selected, and then more accurate position stop signals are input from the hole 49 ₉ . When the amount of light received by the two light-receiving elements 52 ₉ and 52 ₁₀ becomes equal, the position is correct and the question "Does the song selection match the address?"
YES, and the motor 42 stops.

Next, the disk pushing motor 53 is turned on, and the partial gear 57 rotates in the direction of the arrow in FIG. 8 via the belt 55 and pulley 54. When it starts to mesh with one of the gears 61, one of the swinging arms 65 swings, and the pushing lever 71 rotates to push out the rear edge 32 of the target shelf board 28. Then,
The shelf board 28 is pushed out by sliding through the storage groove 16 with the disk 2 placed thereon, and the notch 31 of the shelf board 28 is located on the upper part of the roller support frame 153, so that the lower surface of the disk 2 is directly in contact with the first roller 154. It is pushed out to the position where it touches. At this time, the swing arm 65 turns on the stationary first switch 73. When "Stationary first switch on?" becomes YES, the extrusion motor 53 stops. At this time, the flat portion of the cam 58 is in contact with the protrusions 64, 64 of the other gear 62 to prevent that gear 62 from malfunctioning.

Next, the air suction motor 160 is turned on and the suction pipes 158 and 159 vacuum-adsorb the disk 2 to the rollers 154 and 155, and the solenoid 164 is energized to fix the tip of the roller support frame 153 to the table 80. The roller drive motor 170 is further rotated to rotate the rollers 154 and 155. Then, shelf board 2
Only disk 2, leaving disk 8, starts to be carried in. "Is the first position sensor on?" is displayed due to the loading operation.
YES, and the air suction motor 160 stops. The rollers 154 and 155 are attracted to the disk 2 only by suction during rotation due to inertia.
and is carried onto the fixed table 80.

When the disk 2 is sent all the way, "Is the third position sensor on?" becomes YES, the solenoid 164 turns off, the roller support frame 153 returns to a position slightly lower than the fixed table 80, and the roller drive motor 170 stops. do. At this time, even if the disk 2 bounces off the back wall, it is stopped by the stopper 166 and does not return any further than necessary.

Next, the play motor 93 for fast forwarding the pick-up, etc. is turned on and rotates the worm 99. At the same time, the solenoid 102 is energized and the worm shaft 9 is rotated.
6 is attracted against the spring 101, and the worm 99 and the worm wheel 114 are brought into mesh with each other. This worm wheel 114 is rotated approximately 65 degrees by the operating piece 117 until the switch 119 is released, but at this time the roller 187 of the swinging piece 122 falls to the lower part of the cam, so the weight of the disk holder 83 causes the reciprocating rod 85 to rotate. is pulled, the disk holder base plate 84 descends under its own weight, and the disk 2 is moved to the holder 83.
and the turntable 78. Also,
When the worm wheel 114 rotates 65 degrees, the worm wheel 114 and the small gear 141 are simultaneously engaged, so the shaft 139 is rotated in the positive direction, and the string 92 wound around the pulleys 89, 90, and 91 The pick-up 7 is fast-forwarded from the stop position to the play start position. The worm wheel 114 and the like rotate 65 degrees, the solenoid 102 is turned off by the switch 119, and the worm 99 is removed from the worm wheel 114 by the spring 101. At this time, the protrusion 185 on the lower surface of the rotating body 184
The leaf spring 207 is strongly pressed against the cam 205, the V-shaped portion of the leaf spring 207 and the recess 206 are engaged, and the position of the gear 140 etc. is corrected.

However, as the play motor 93 continues to rotate, the worm shaft 96 also continues to rotate, and the nut 109
At the same time, the arm 107 swings around the fulcrum 110, and the lower sliding plate 124 is connected to the integrated engagement piece 128.
It is pushed out against the spring 127 while in contact with the spring 127. When this sliding plate 124 is pushed out to a predetermined position, the lock plate 130 is attracted by the spring 193, so the hook piece 191 and the lock part 194 are engaged and locked.
At the same time, the play worm 133 meshes with the worm wheel 140. Then, the switch 111 is operated by the arm 107, and the play motor 93 is stopped. At the same time, as the sliding plate 124 moves, the protrusion 210 that has engaged with the integral engagement hole 212 is moved, so that the first swing plate 145 and the second swing plate 148 are moved.
The tip moves against the spring 150 to release the brake 151 and turn on the disk motor switch 146. Therefore, the disk drive motor 76
rotates to rotate disk 2 at high speed. Also,
As the sliding plate 124 moves, the eccentric protrusion 142 at the tip of the first guide rod 86 is pressed by the actuating plate 132 and rotates around the first guide rod 86 , causing the stylus 8 to rotate.
1 is brought into contact with the play start position of disk 2. Gears 198, 200, 202, 204, 20 for decelerating the rotation of the disk drive motor 76
Since the worm 133 of the worm shaft 131 is rotated via the worm wheel 14
0. The pick-up 7 moves slowly in synchronization with the rotation of the disk 2 via the pulleys 89, 90, 91 and the string 92. Then, the image and sound recorded in the signal groove of the disk 2 are reproduced.

When the end signal from the signal groove of the disk 2 is detected by the end signal detection circuit 183, the play motor 93 is turned on and rotates in the reverse direction, causing the worm shaft 96 to rotate in the reverse direction and moving the arm 107 with the nut 109 toward the original position. Make it move. As the arm 107 moves, the inclined plate 195 presses the protrusion 196 against the spring 193, so the lock is released and the sliding plate 1
24 is returned to its original position by a spring 127.

Note that if the lock is not released, the rotating body 18
4 continues to rotate, the emergency stepped portion 186 on the lower surface pushes out the tongue piece 197 of the lock plate 130, and the lock is released. When the sliding plate 124 returns, the first guide rod 8
The stylus 8 is disengaged from the protrusion 142 of the stylus 8.
1 lifts up and leaves disk 2. Further, since the worm 133 is removed from the worm wheel 140, the feeding of the pick-up 7 is also stopped. At the same time, with the return of the sliding plate 124, the first and second rocking plates 145,
148 also rotates in the opposite direction, the brake 151 is applied, and when the switch 146 is turned off, the disk drive motor 76 is stopped.

By the return of the arm 107, the switch 11
2 is activated, the solenoid 102 is energized, the worm 99 and the worm wheel 114 are engaged, and the gear 141 is transferred from the worm wheel 114 to the worm wheel 114.
A string 92 wound around pulleys 89, 90, 91 via
In order to return in the opposite direction, the pick-up 7 is also returned in fast forward direction. Then, when the pick-up 7 is returned to its original position, the switch 12 is turned on by the operating piece 118.
0 is closed, the play motor 93 stops, the roller 187 of the swinging piece 122 is pushed by the cam 115, the reciprocating rod 85 is returned, the disk holder support plate 84 is raised, the fixation of the disk 2 is released, and the play starts. will end. At this time, the nut 109 of the arm 107
Even beyond the thread 106, there is a play part 105 with a small diameter.
I'm spinning around in vain.

Next, when the pick-up 7 returns to the position, the cam 116 presses the actuating plate 188 to open the switch 19.
Close 0. Since polishing is performed every time this signal is output three times, the "grinding counter is set to 3.
mosquito? ” is determined by the CPU 175, and if YES, the polishing motor 144 is turned on, a solenoid (not shown) is energized, the polishing plate 143 is raised, and the stylus 8 is polished.

Due to the end of play, air suction motor 1
60, solenoid 164 and roller motor 17
0 is activated. That is, the roller support frame 153 is swung by the solenoid 164 to lift the peripheral edge of the disk 2 to a position where it is removed from the stopper 166, and the rollers 155, 154 carry it out while adsorbing it with negative pressure.

The disk 2 is the first and second position sensor 167,1
After blocking 68 once, when it passes completely, "Are the 1st and 2nd position sensors on?" becomes YES.
Air suction motor 160, roller motor 1
70 is turned off and solenoid 164 is also demagnetized. At this time, the disk 2 is placed on the shelf board 28 that was pushed out when it was carried in.

The disk extrusion motor 53 reverses, and the gear 5
7 and 61, the swinging arm 65 is rotated in the opposite direction as shown by the arrow in FIG. is returned to its original position.
The gear 57 further rotates and meshes with the other gear 62, causing the swing arm 66 to swing as shown by the arrow in FIG. The rotation of the push-in lever 72, which is integrated with the swing arm 66, rotates the arm 19 of the rack 3 against the spring 27, so that the push-in bars 21 and 22 on both sides come into contact with both sides of the shelf board 28, and the rack 3 is rotated against the spring 27. In the storage groove 16 of No. 3, there are side stoppers 30, 30.
Push in until they touch. When this pushing is completed, "Is the reversal switch on?" becomes YES. At this time as well, the flat portion of the cam 58 is in contact with the protrusions 63, 63 of the other gear 61 to prevent malfunction.

When the reversing switch 74 is turned on, the push motor 53
rotates normally again, and the gears 57 and 62 rotate, so that the swing arm 66 swings toward the original position as indicated by the arrow in FIG. When the stationary second switch 75 is turned on by the swing arm 66, this pushing motor 53
stops. Here, if there are coins again, the same operation is repeated, otherwise the game ends.

Note that when the elevating plate 35 is operating, the eighth
In the state shown in the figure, the flat portion of the cam 58 is in contact with both gears 63, 63, 64, and 64 to prevent malfunction during elevation.

In the above embodiment, the case of a so-called TED type soft disk was explained. However, it can also be used with other hard disks such as the Philips type and RCA type, and can also be used with PCM audio disks and other general audio disks other than video disks.

Since the present invention is configured as described above, the pickup can be quickly set at the playback position and reset from the end of playback to the original position, and the moving speed of the pickup and the rotational speed of the disk can be adjusted quickly during playback. Synchronization is extremely accurate;
Particularly, when used in a TED type video disc in which the width of the signal groove is several μm, it exhibits an extremely excellent effect. In addition, in addition to providing a fast-forwarding gear and a low-speed moving gear on the same axis as the pulley around which the pick-up moving string is wound, a position correction cam is also provided.
A leaf spring having a V-shaped portion is provided facing the recess on the outer periphery of the position correction cam, and when the fast-forwarding gear and the intermediate gear are disengaged and are in a free rotation state, the V-shaped portion of the leaf spring is attached to the cam. Since it is provided to engage with the recess, even if the pick-up overruns due to inertia or moves back and forth due to a timing shift of the pulley when entering the playback state from fast forwarding, it will always be corrected to the correct position. Therefore, even if position control in micrometer units is required, not only is correct playback possible at all times, but since there is no need for positional accuracy such as gears, etc., the accuracy of mechanical structural parts and adjustments is not as high. It is possible to provide an inexpensive device without the need for

[Brief explanation of the drawing]

The figures show an embodiment of the video disc autochanger device according to the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is an overall front view, and Fig. 3 is a rack as a storage means. FIG. 4 is a perspective view of the shelf board, FIG. 5 is a partially enlarged view of the rack, FIG. 6 is a partially cutaway side view of the selective delivery means, and FIG. 7 is a partially cutaway view of the same. A plan view, FIG. 8 is a cutaway plan view of the same board, FIG. 9 is a front view of the perforated plate, FIG. 10 is an enlarged view of the same as above, FIG. 11 is a cross-sectional plan view of the address detection device, and FIG. 12 is a playback 13 is a longitudinal sectional side view of the same, FIG. 14 is a bottom view of the same, FIG. 15 is a perspective view of the main parts of the same, and FIG.
6 is a longitudinal sectional front view of the conveying means, FIG. 17 is a sectional view taken along the line A--A in FIG. 1, FIG. 18 is a block diagram of the control circuit, and FIG. 19 is a flowchart for explaining the operation. DESCRIPTION OF SYMBOLS 1...Substrate, 2...Video disk, 3...Rack, 4...Storage means, 5...Selection sending means, 6
... mounting and rotating device, 7... pick-up,
8... automatic feeding device, 9... playing means, 10...
...Transportation means.

Claims (1)

[Claims] 1. A video disk is removably fixed to a turntable connected to a disk drive motor,
In the apparatus for detecting a video signal from the rotating video disk while moving the pick-up at a predetermined speed, a gear for fast-forwarding and a gear for slow-speed movement are coaxially connected to a pulley around which a string for reciprocating the pick-up is wound. A gear and a position correction cam are integrally connected, and a play motor and a coupling gear are provided on the fast-forwarding gear through an intermediate gear having teeth at a predetermined center angle in between, and facing the low-speed moving gear. A low-speed gear is provided, a positioning leaf spring is provided facing the position correction cam, and the gear for coupling to the play motor and the low-speed movement gear are selectively engaged depending on whether the movement is fast-forward or slow-speed movement. , characterized in that a recess is formed on the outer periphery of the position correction cam, with which the V-shaped portion of the leaf spring engages when the fast-forwarding gear and the intermediate gear are disengaged and are in a free rotation state. Automatic changer device for video discs. 2. The fast-forwarding gear and low-speed moving gear of the pick-up are comprised of worm wheels, and the play motor coupling gear and disc drive motor coupling gear are composed of worms. equipment.