Crane in a displaceable and reassembled for use on construction sites

摘要

Crane in a displaceable and reassembled for use on construction sitesThe boom of such a crane is provided with a movable load bearing device and with devices arranged on the opposite side is provided for receiving a counterweight. The receptacle is adjustable in such a way that, in the case of a predetermined counterweight the effective counterweight acting in accordance with a changing load of the crane can be adjusted, so that the crane does not tip over.However, it is no overload safety device, which the drive of the cable winch of the traction rope is guided via the boom automatically switches off, as soon as the total load is too heavy.It is a small crane, the individual components, easily be transported to the building site and can be joined together are. In this case, it should be possible to mount different counterweights, which prevent a tilting of the crane, whereby in addition a mechanical overload safety device for switching off of the winches engine is.The underframe of the crane is made of flat profile tube frame is produced with a cross member, which is placed on the narrow front side, which carries the mast, wherein the cantilever to the mast in a fixed angle is applied. Between a rear transverse support and the the front side, an additional central cross member is applied and on this a pivotable cable winches rocker by means of a u - fömigen lever 48 and counterweights, and with a traction cable drum or the motor off tender, pivotable stop lever. This can be rotated with respect to the rear transverse support of the support frame and tensioned in the opposite direction to the cable winches rocker is pivoted against a off switch of the engine.