Abstract: An automatic disc exchanging apparatus including pallets 19 each of which can support a disc D, storage cabinets 12 which stores said pallets 19, recording and reproducing drives 13 for recording and reproducing information on and from said discs D, and a transporting mechanism for transporting said pallets 19 between said storage cabinets 12 and said recording and reproducing drives, magnetic members 20a are provided in the vicinity of claw portions 19c-19f of the pallet 19. The storage cabinet 12 has an opening 12a through which the pallet 19 can move into and out of the storage cabinet, side walls 12d, 12e having grooves 12b, 12c formed therein for guiding side edges of the pallet 19, and a rear wall 12f which receives an end of the pallet 19, and magnets 20b which attract said magnetic members 20a in the pallet 19 are provided on the rear wall 12f.

Abstract: An automatic disc exchanging apparatus including pallets 19 each of which can support a disc D, storage cabinets 12 which stores said pallets 19, recording and reproducing drives 13 for recording and reproducing information on and from said discs D, and a transporting mechanism for transporting said pallets 19 between said storage cabinets 12 and said recording and reproducing drives, magnetic members 20a are provided in the vicinity of claw portions 19c-19f of the pallet 19. The storage cabinet 12 has an opening 12a through which the pallet 19 can move into and out of the storage cabinet, side walls 12d, 12e having grooves 12b, 12c formed therein for guiding side edges of the pallet 19, and a rear wall 12f which receives an end of the pallet 19, and magnets 20b which attract said magnetic members 20a in the pallet 19 are provided on the rear wall 12f.

Abstract: A rotating frame 22 is supported by a stationary frame 21 rotatably by 180 degrees, and in both side plates 22c of the rotating frame 22, there are formed four pairs of guide grooves 25-28 for guiding pallets 9 and slots 32a-32d for moving claw members 30, 31, said slots corresponding to said guide grooves 25-28. On an inner wall of a rear plate 22b of the rotating frame 22, there is provided an up and down movable member 47 which moves downward together with the claw members 30, 31 when the rotating frame 22 is rotated by 180 degrees. Into the first and third guide grooves 25 and 27, there have been previously inserted empty pallets 9 with such a posture that their front surfaces 11 face downward. By moving the claw members 30, 31 along the slots 32b, 32d, the pallets 9 having discs D placed thereon are drawn into the second and fourth guide grooves 26 and 28 such that these pallets 9 are opposed to the upper empty pallets 9.

Abstract: An apparatus for automatically exchanging a number of record medium cassettes includes a housing, a cassette storing device arranged within said housing for storing the cassettes, recording and reproducing devices arranged within said housing for recording and reproducing information on and from the record medium cassettes, a cassette transporting device arranged within said housing for transporting a plurality of cassette hand over units, a mail box having a cassette supply room and a cassette receipt room, a transport unit for transporting the cassettes between the cassette hand over units and the mail box. By using a plurality of cassette hand over units, the cassettes can be transported efficiently. By using the mail box, a new cassette can be automatically supplied into the housing and an unnecessary cassette can be automatically removed from the housing.