JPS6314422B2 - - 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. The present invention relates to an autochanger device for a video disc which reproduces video and audio and returns the disc to its original rack after the playback, and particularly relates to means for transporting the disc between the rack and the player.

More specifically, various methods are currently used for video discs, and among them, the so-called TED method uses a thin vinyl chloride sheet disc with a diameter of 21 cm and a thickness of 0.1 mm. And the signal groove carved into the disk is
Its width is several microns and its depth is about 1 micron. Furthermore, the pick-up is constructed by directly connecting a piezoelectric element to the base of a sled-shaped diamond needle. and,
Place the disk on a fixed table at high speed (usually
When rotating at a speed of 1800 rpm), 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, in an automatic changer device using a coin, for example, for storing a large number of such video discs and automatically selecting and playing a desired video disc, the present invention is particularly useful for transferring a disc from a rack to a playing means. and a conveying means for loading and unloading the disk from the playing means to the rack, in which a roller support frame interposed between the rack and the fixed table is loosely fitted into a notch on the periphery of the fixed table, and the disk is loaded and unloaded from the rack. The roller support frame is moved slightly up and down from the fixed table surface in accordance with the timing of unloading, and is moved by the rotation of the rollers and negative pressure suction.

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 there is a storage means 4 mainly consisting of a rack 3 storing a plurality of video discs 2 in multiple stages, and from this storage means 4 the desired disc. A selection means 5 is provided for selecting and sending out 2. Further, on the left side of the board 1 in the figure, there is provided a playing means 9 consisting of a disk 2 mounting and rotation device 6 and an automatic pickup 7 feeding device 8. moreover,
A transport means 10 is provided between the storage means 4 and the play means 9 for reciprocating the disk 2 between the storage means 4 and the play means 9.

The storage means 4 forms a rack 3 with both side plates, a top plate and a bottom plate, and a number of horizontal storage grooves are formed at regular intervals on the inner surfaces of the both side plates.

Shelf board 28 slidably inserted into the storage groove
is made by bending a lightweight metal plate such as aluminum, the rear parts of both edges serve as sliding parts, the front part has a stopper, and the center of the front edge is used for loading and unloading the disk 2. A notch 31 is formed for
At the rear edge, there is an extruded part 32 that also serves as reinforcement, and in the central plane, a protrusion for stopping the disk 2 is provided.

Next, the conveying means 10 will be described. A U-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 189 are connected to the attachment chambers 156 and 157 of 55, respectively, and are coupled to an air suction motor to 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 a plunger 165 of a solenoid 164. and disk 2
The roller support frame 153 is lifted up slightly above the fixed table 80 during loading and unloading, and is slightly lower than the fixed table 80 during play. Fixed table 8 located on one side of this support frame 153
A stopper 166 for preventing the loaded disk 2 from bouncing back is provided on the outer periphery of the rack 3 so as to be inclined on the rack 3 side and substantially vertical on the fixed table 80 side. Further, on the side of the roller support frame 153 and on the loading side of the fixed table 80, first and second position sensors 167 and 168 each consisting of two light emitting elements and a light receiving element are provided.
A third position sensor 169 is provided at the farthest position from the loading side.

Next, the operation of the present invention will be explained.

The target disk 2 is pushed out part way from the rack 3 of the storage means 4 together with the shelf board 28. Then, the notch 31 of the shelf board 28 is located above the roller support frame 153, and the lower surface of the disk 2 is in direct contact with the first roller 154.

Next, the air suction motor is turned on and the suction pipes 158 and 159 move the disk 2 to the roller 15.
4, 155 side, and solenoid 16
4 is energized to lift the tip of the roller support frame 153 slightly higher than the peripheral edge of the fixed table 80, and further rotates the roller drive motor 170 to rotate the roller 15.
Rotate 4,155. Then, only the disk 2 starts to be carried in, leaving the shelf board 28 behind. Due to the carry-in operation, the first position sensor 167 is turned on, and the air suction motor is stopped. Then, the disk 2 is carried onto the fixed table 80 by rollers 154 and 155 while being attracted only by suction during rotation due to inertia.

When the disk 2 is sent to the back, the third position sensor 169 is turned on, the solenoid 164 is turned off, and the roller support frame 153 is moved to the fixed table 80.
The roller drive motor 17 returns to a slightly lower position.
0 stops. 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.

The disk 2 is fixed to a turntable at the center of a fixed table 80, and rotates at high speed while forming an air action between the disk 2 and the fixed table 80. Then, the pick-up 7 moves on the disk 2 and plays it back.

When the play (reproduction) ends, the rotation of the disk stops and the hold by the turntable is released. Next, the air suction motor, solenoid 164 and roller motor 170 are activated.
In other words, the solenoid 164 causes the roller support frame 1 to
53 swings to stop the periphery of the disk 2 from the stopper 16.
6 and is carried out by rollers 155 and 154 while being suctioned with negative pressure.

Disk 2 is the first and second position sensor 167,1
68 and then completely passes through, the first and second position sensors 167 and 168 are turned on, the air suction motor and roller motor 170 are turned off, and the solenoid 164 is also demagnetized. Then, the disk 2 is placed on the shelf board 28 and stored in the rack 3, waiting for the next loading.

As described above, in the present invention, the conveying means is provided facing the notch in the peripheral edge of the fixed table, and this conveying means is moved up and down in accordance with the timing of loading and unloading the disk. It is reliably fed into position, and there is no need to force it. Therefore, it is suitable for loading and unloading disks made of thin sheets like the TED method, and does not cause damage to the disks.
A notch is formed in a part of the peripheral edge of the fixed table on the disk loading/unloading side, and a stopper is formed near the notch, and this stopper is provided in a shape that is inclined in the video disk loading direction and substantially perpendicular to the video disk loading direction. Therefore, when carrying in the disk, by raising the tip of the roller support frame slightly above the stopper, the disk slides on the slope of the stopper and is smoothly fed onto the fixed table, and once it is fed onto the fixed table. After that, when the tip of the roller support frame is lowered, the disk is stopped at a substantially vertical portion of the stopper, and the disk is accurately positioned without being displaced due to rebound. Also,
Since the fixed table does not rotate, the stopper does not cause any interference when the disk rotates. Moreover, if the rollers for loading and unloading are connected to a drive motor using a pulley and a belt, smooth transmission can be achieved even when the conveying means moves up and down.

[Brief explanation of the drawing]

The figures show an embodiment of an autochanger device for video discs 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 longitudinal sectional front view of a conveying means. , FIG. 4 is a sectional view taken along the line AA in FIG. 1. 1... Board, 2... Video disk, 3... Rack,
4...Storage means, 5...Selective delivery means, 6...Mounting and rotation device, 7...Pickup, 8...Automatic feeding device, 9...Playing means, 10...Transportation means.

Claims (1)

[Scope of Claims] 1. One video disc is selected by a selection means from a storage means for storing a plurality of video discs, and the video disc is placed from the storage means to the center of a fixed table by a conveying means. the video disc is transferred to a turntable provided with a holder, and the video disc is removably fixed to the turntable using a holder;
The video disk is rotated by a disk drive motor and a video signal is detected from a disk signal groove by a pickup, in which a notch is formed in a part of the peripheral edge of the fixed table on the disk loading/unloading side. At the same time, a stopper is provided near this notch, which is inclined in the video disk loading direction and substantially perpendicular to the video disk unloading direction, and facing the notch, a roller support frame of the conveying means is provided in a loosely fitted state, and a stopper is provided in the roller support frame. A suction pipe for sucking the video disk under negative pressure is connected to the loading/unloading roller side, and the fixing table is connected to the roller support frame from slightly above the top surface of the stopper using the opposite end of the loosely fitting part with the notch as a fulcrum. An autochanger device for a video disc, characterized in that it is provided with a swinging means mainly composed of a solenoid, which swings the device slightly below the surface of the video disc. 2. The video disk autochanger device according to claim 1, wherein the loading/unloading roller is connected to a roller driving motor by a pulley and a belt.