| 摘要 |
PURPOSE: A disk loader for a disk exchanging system is provided to selectively take out a disc housed within a housing unit for recording or reproducing information signals on or from the disc. CONSTITUTION: A disc recording/reproducing apparatus for selectively taking out a disc housed within a housing unit(8) for recording or reproducing information signals on or from the disc is disclosed. The apparatus includes a housing unit(8) for housing a plurality of sub-trays(14) each configured for setting a disc on it in a direction normal to the disc surface direction so that the discs lie parallel to one another, a disc recording/reproducing unit(5) provided within a main member of the apparatus, a main tray for holding a selected sub-tray and for being horizontally shifted between a first position of being protruded from the main member of the apparatus and a second position within the main member of the apparatus, transfer device(88) for selectively taking one of the sub-trays out of the housing unit and/or housing the sub-tray thus taken out in the housing unit, lift device(25) for shifting the transfer device and the main tray shifted to the second position between the disc recording/reproducing unit and the housing unit, detection device for detecting the position of the lift device and control device for controlling the lift device based on an output signal of the detection device. The apparatus also includes disc presence/absence detection device for detecting whether or not there is a disc on the sub-tray pulled out by the transfer device from the housing unit. The control device controls the operation of the lift device based on an output of the disc presence/absence detection device. The control device shifts the main tray to the first position when an output signal of the disc presence/absence detection device indicates the absence of the disc on the sub-tray pulled out by the transfer device. The control device actuates the lift device for uplifting or lowering the tray and the transfer device for loading the disc on the sub-tray on the disc recording/reproducing unit when an output signal of the disc presence/absence detection device indicates the presence of the disc on the sub-tray pulled out by the transfer device.
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