Patent ID: 8857875

Claim:
A robot comprising: a robot arm; and a robot hand, at a distal end of the robot arm, configured to grip an object, the robot hand comprising: an air chuck device comprising: a pair of pistons each comprising a first side and a second side; and an air cylinder configured to open and close the pair of pistons in parallel to one another; a pair of first gripping members secured to the first sides of the pair of pistons, configured to move close to and apart from one another within a first movable range on a movable plane; and a pair of second gripping members secured to the second sides of the pair of pistons, configured to move close to and apart from one another within a second movable range different from the first movable range on the movable plane, the robot hand being configured to pivot relative to the distal end of the robot arm about a pivot axis approximately perpendicular to the movable plane, wherein the pair of pistons comprise a first piston having a first side and a second side, and a second piston having a first side and a second side, wherein the pair of first gripping members are respectively secured to the first side of the first piston and the first side of the second piston at a first distance apart from one another, and wherein the pair of second gripping members are respectively secured to the second side of the first piston and the second side of the second piston at a second distance apart from one another, the second distance being greater than the first distance.