Medium separation device of ATM

A medium separation device of an automated teller machine (ATM), which separates stacked media sheet by sheet and feeds them toward a transfer path, the medium separation device comprising:

• three pickup rollers disposed above the stacked media, each of the pickup rollers having a first friction member protruding from a portion of the outer periphery of a roller body of each of the pickup rollers so as to be contacted with the stacked media, each of the pickup rollers sequentially picking up and feeding the stacked media by the first friction member according to the rotation of the roller body, the three pickup rollers spaced apart on a same shaft along a direction perpendicular to a medium feeding direction in which the stacked media are fed;
• two feed rollers spaced apart from the pickup rollers in the medium feeding direction on a same shaft, each of the feed rollers having a second friction member provided on a portion of the outer periphery of a roller body of each feed roller so as to be contacted with media picked up and fed by the pickup rollers, each of the feed rollers feeding the picked-up and fed media toward the transfer path through the second friction member while rotating with a same phase as the pickup rollers, each of the feed rollers inserted between the pickup rollers;
• and
• four medium separation units disposed below the feed rollers, each of the medium separation units having a plurality of separation rollers and a separation belt wound around the separation rollers, the medium separation unit separating a following medium, which is simultaneously fed while being in close contact with a preceding medium fed by the pickup roller and the feed roller, from the preceding medium through the friction of the separation belt, each pair of the medium separation units is disposed below both sides of each of the feed rollers.