| 摘要 |
A device for transporting flat objects, in particular substrates, has a movable gripper (23) with a bearing arm (49) and a swivelling bearing element (51). In order to avoid collisions between the gripper (23) and a wafer (25) in a loading compartment of a cartridge (27) when picking up an object, a fluid sensor (81, 101) arranged on the bearing arm (49) of the gripper (23) measures without contact the distance to at least one wafer (25) adjacent to the bearing arm (49). An optical detection arrangement (29') which consists of an emitter (31') and of a receiver (33') is further arranged on the gripper (23). The emitter (31') emits light rays in the longitudinal axis of the gripper (23). The receiver (33') extends on both sides of the longitudinal axis, so that even light which is angularly reflected with respect to the longitudinal axis because of a laterally oriented wafer flat may be detected. The bearing element (51) may be swivelled into its working position by a traction rod (59) secured at two points which extends without contact in a groove (57) of the bearing arm (49). By retracting the bearing arm (49), the wafer (25) to be transported may be clamped between the bearing element (51) and a bearing element (50) arranged on the housing (53). |
