Patent ID: 11964850
Assignee: LIEBHERR-WERK BIBERACH GMBH
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 16:
17. A fast-erecting crane comprising:
a telescopable and/or luffable tower with a height-adjustable mounted control and/or personnel stand configured to be lifted and lowered by two lifting elements, wherein the two lifting elements are articulated to a balancing rocker that is luffably mounted on a rocker bearing head connected to the control and/or personnel stand about a horizontal pivot axis;
a monitoring and/or safety device for monitoring the control and/or personnel stand, wherein the pivot axis is configured as a measurement axis for detecting the load state of the luffable bearing of the balancing rocker and for providing a load signal to the monitoring and/or safety device; and
an evaluating device for evaluating the measurement signal of the measurement axis, wherein the evaluating device is configured to employ a height and/or a change of the measurement signal of the measurement axis to distinguish between an overload of the control and/or personnel stand at a proper operating condition of the lifting elements and the balancing rocker, and a malfunction of the lifting elements and/or the balancing rocker.