Patent ID: 8919762
Filing Date: 2014-12-30
Classification: B65H

Abstract:
1. A paper sheet pickup device comprising: an input portion configured to place a plurality of paper sheets while overlapping each other; a pickup member configured to pick up, one by one, the paper sheets present at a pickup position of the input portion; an air drawing source configured to draw air via the pickup member and suck the paper sheet to the pickup member; and a valve device configured to be interposed between the pickup member and the air drawing source, and switch supply of a negative pressure and a positive pressure to the pickup member, wherein the valve device includes: a main body block configured to be arranged on a rear surface side of the pickup member to face the rear surface side; an air chamber configured to be formed in the main body block and be open to the pickup member; a first air hole configured to be formed in the main body block to extend through the main body block, and have one end communicating with the air chamber and the other end connected to a negative pressure side of the air drawing source; a second air hole configured to be formed in the main body block to extend through the main body block, and have one end communicating with the air chamber and the other end connected to a positive pressure side of the air drawing source; a rod-shaped valve member configured to be arranged in the main body block to cross the first air hole and the second air hole, and rotate to alternately open and close the first air hole and the second air hole; and a driving source configured to rotate the valve member.