Tower slewing crane

US9738493B2 · kind B2 · utility

Assignee

• Liebherr-Components Biberach GmbH · DE

Inventors

• Oliver Fenker · Warthausen, DE
• Michael Palberg · Riedlingen, DE

Key dates

• Filing date: Dec 16, 2013
• Grant date: Aug 22, 2017
• Expiry date: Feb 27, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66C23/022
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a crane, having a jib rotatable about an upright axis, at which jib a trolley is movably arranged, from which trolley a hoist rope connected to a load hook runs off, as well as a load hook position determining device for determining the position of the load hook. The load hook position may be determined optically by means of one camera only, which camera is mounted on the trolley of the crane and views from the trolley in a predetermined and thus known viewing direction downwards onto the load hook. In doing so, the position of the load hook in the camera image is determined by an image evaluator. To simplify detection of the load hook in the camera image, the image evaluator may include rope run determining means for determining the rope run of the hoist rope running off from the trolley.