Bidirectional transfer mechanism

Details Bidirectional transfer mechanism Bidirectional transfer mechanism

1986-04-11

1989-04-11

Aschenbrenner, Peter A.

Material or article handling

Plural, static structures for supporting discrete loads and...

Load-underlying members

901 16, B65G 100

Patent

active

048201090

ABSTRACT:
A bidirectional transfer mechanism is provided for independent or simultaneous X-axis and Y-axis precision displacement of a mobile component, such as a video cassette pick-up unit for retrieving or returning video cassettes from a cassette library. The transfer mechanism comprises an upright column assembly supported on a machine frame for X-axis displacement and carrying the pick-up unit for Y-axis displacement. A first drive cable is connected to the upper and lower ends of the column assembly and threaded over a first set of pulleys on the machine frame, with a portion of the first cable being wrapped about a motor-driven winding drum for displacing the column assembly in the X-axis direction. A second drive cable has a portion thereof wrapped about another motor-driven winding drum and is threaded about a second set of pulleys on the column assembly and the pick-up unit, whereby drum rotation displaces the pick-up unit along the column assembly in the Y-axis direction.

REFERENCES:
patent: 3490616 (1970-01-01), Castaldi
patent: 3502882 (1970-03-01), Von Voros
patent: 3536194 (1970-10-01), Novak
patent: 3732742 (1973-05-01), Castaldi
patent: 3779403 (1973-12-01), Young
patent: 3840131 (1974-10-01), Castaldi
patent: 3934741 (1976-01-01), Wentz
patent: 3993198 (1976-11-01), Hann
patent: 4363257 (1982-12-01), Harris et al.

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