Crane

Abstract

The invention relates to a crane, in particular to a truss arm type crane, comprising a hook pulley set. The hook pulley set comprises a lifting device, especially a hoisting hook, wherein the hook pulley set comprises at least one winch; a control rope released by the winch and the arm of the crane are connected or can be connected so as to protect and / or orient the position of cargos or the position of the hook pulley set.

Description

technical field [0001] The invention relates to a crane, in particular a lattice jib crane, which has a hook block with a cargo lifting device, in particular a lifting hook. Background technique [0002] When lifting large loads at high heights, the stability of the lifting system against external influences, in particular acting wind forces, plays a decisive role. Large goods to be lifted have a large area and thus provide a large surface area for the wind force to act on. The applied forces cause swaying of the load or cause swinging of the hook, which can result in an unstable lifting system. For safety reasons, a limit value for the maximum permissible wind speed is defined until this limit value allows the planned lift to be fully realized. [0003] The stability of the system with respect to the acting wind forces is also a decisive criterion when installing lifted goods at high altitudes, since it is desirable that the goods be aligned as precisely and stably as pos...

AI Technical Summary

Problems solved by technology

[0004] The development of this type of lifting system was aimed at extending the maximum permissible limit value of the wind speed, since each individual lifting or each installation entails enormous equipment and operating costs

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