Shaft ring gripper, has case slidably formed between stop and guide ring, and releasing and/or blocking switching device operative between guide ring and draw pipe based on relative displacement of guide ring and draw pipe

摘要

The gripper has clasp element arms (2) turning radially outward a radial pivoting spreader (8) that is coaxially arranged with a vertical guide ring (1). A case (9) is slidably formed between a stop (6) and the guide ring. A releasing and/or blocking switching device is operative between the guide ring and a draw pipe (5) based on the relative displacement of the guide ring and the draw pipe. Primary and secondary clasp elements (3, 4) are positioned in a common horizontal plane, where the secondary elements terminate radially inwardly related to the primary elements.