Medium transport device and medium processing apparatus

A medium transport device comprising:

• a feeder that transports a medium;
• a stacker that receives the medium transported by the feeder between a support surface for supporting the medium in an inclined posture in which a downstream side in a transport direction is directed downward and an opposing surface opposing the support surface and stacks the medium;
• an aligner that aligns a downstream end of the medium stacked in the stacker;
• a paddle that is provided between the feeder and the aligner in the transport direction and moves the medium toward the aligner by rotating while being in contact with the medium;
• and
• a controller that controls an operation of the paddle, wherein the controller controls the operation of the paddle according to a condition,
• wherein the controller uses a plurality of conditions as the condition.

A medium transport device comprising:

• a feeder that transports a medium;
• a stacker that receives the medium transported by the feeder between a support surface for supporting the medium in an inclined posture in which a downstream side in a transport direction is directed downward and an opposing surface opposing the support surface and stacks the medium;
• an aligner that aligns a downstream end of the medium stacked in the stacker;
• a paddle that is provided between the feeder and the aligner in the transport direction and moves the medium toward the aligner by rotating while being in contact with the medium;
• and
• a controller that controls an operation of the paddle, wherein the controller controls the operation of the paddle according to a condition, wherein
• the feeder is a feed roller pair including a driving roller controlled to rotate by the controller and a driven roller driven to rotate following the rotation of the driving roller, and
• the controller makes a circumferential speed of the paddle faster than a circumferential speed of the driving roller.