Patent ID: 8661926

Claim:
A robot system comprising: a first robot manipulator configured to work on a workpiece at a work area, the first robot manipulator having a plurality of arm bodies rotatably connected to each other; and a second robot manipulator configured to work on the workpiece at the work area, the second robot manipulator having a plurality of arm bodies rotatably connected to each other, wherein the first robot manipulator is arranged at a location between the work area and the second robot manipulator, wherein the first robot manipulator and the second robot manipulator each comprises: a base; a first arm body rotatably and directly connected to the base, the first arm body being configured to rotate around a first rotational axis that extends in a vertical direction from the base; a second arm body that is directly connected to the first arm body and configured to rotate around a second rotational axis that extends in a direction orthogonal to the first rotational axis; and a third arm body that is directly connected to the second arm body and configured to rotate around a third rotational axis that extends in a direction orthogonal to the second rotational axis; wherein the second robot manipulator is configured such that, when the second robot manipulator is extended in a vertical orientation such that the third rotational axis extends in the vertical direction and is parallel the first rotational axis, the first rotational axis offset from the third rotational axis by a predetermined distance, and wherein the second robot manipulator further comprises: a joint shaft at a distal end of the second robot manipulator having a motion range extending to a position below the base of the second robot manipulator.