SCREW FASTENING SYSTEM AND SCREW FASTENING METHOD

摘要

A screw fastening system according to an embodiment is provided with a robot, a control device, a first bit driving portion, a second bit driving portion, and a bit holding portion. The robot is an articulated robot that has a hand at a leading end thereof. The control device controls the driving of the robot. The first bit driving portion is selectively grasped by the hand and directly outputs the rotational driving force generated by a motor. The second bit driving portion is selectively grasped by the hand and outputs through a speed reducer the rotational driving force generated by a motor. The bit holding portion is mounted on the first bit driving portion and/or the second bit driving portion and holds a bit that is rotated about the axis by the input rotational driving force.