A method for securing a lifting movement of a load mechanically coupled to a hook of a lifting device by flexible links, wherein the flexible links can be, when the load is placed on the ground, either in a stretched state or in a relaxed state. The method includes detecting an initiation of a transitional phase between an initial instant when the load is placed on the ground and a final instant when the load is suspended in the air; and emitting a detection signal of a proscribed lifting situation, if the flexible links are, at least at an instant of the transitional phase, in the relaxed state.

The present invention relates to a crane, for example in the form of a fast-erecting crane comprising a telescopic and/or luffing tower, having a crane controller for controlling crane movements by means of drive devices, wherein the crane controller has a monitoring device for monitoring stability and limiting crane movements if a load limit is reached. According to the invention, the monitoring device has a wind resistance detection unit for detecting at least one variable wind resistance parameter which influences the wind resistance of the crane, and is designed to change the load limit depending on the detected wind resistance parameter and/or to consider different load limits depending on said wind resistance parameter.

Provided is a crane including a boom. The crane hoists a suspended load through a hook from a tip of the boom, and position adjustment control for causing a position of the hook and a position of the tip of the boom to be close to each other as viewed in a vertical direction is performed until the suspended load is separated from a ground surface from a start of a hoisting motion.

A method for open-loop and/or closed-loop control of a vehicle-mounted lifting gear, which lifting gear comprises an articulated crane arm system having a crane and a crane base, includes taking into account a determined position of at least one point of the crane arm system. A deformation of the crane arm system arising under the action of dynamic and/or static forces is taken into account when determining the position of the at least one point. An oblique position of the lifting gear resulting from an inclination of the crane base relative to a predetermined or predeterminable direction in space is determined and taken into account when determining the position of the at least one point.

A lifting machine includes a machine chassis, a boom extending from the machine chassis, a connector extending from the boom for coupling to a load, a control system that determines a rated lifting capacity of the machine, based on an orientation of the machine chassis and a lifting load, and a display. The display indicates the rated lifting capacity relative to a total lifting capacity, and the display also indicates the lifting load relative to the rated lifting capacity and the total lifting capacity.

The present invention relates to a log handler having a wheel loader base unit on which is located a working equipment which is movable relative to the base unit and which comprises a tool, in particular a wood grabbing device, wherein the log handler comprises first means which are configured to determine the payload, and the log handler comprises second means which are configured to determine, based on the payload determined by the first means and based on geometry data of the log handler, a parameter which is representative of the stability of the log handler.

The present disclosure relates to a lifting device, in particular a mobile crane or a cable-operated excavator, that comprises a superstructure, a main boom that starts from the superstructure, a luffing boom that starts from the end of the main boom remote from the superstructure, a winch arrangement, and a tilting moment detection unit for determining the tilting moment acting on the lifting device by the position of the main boom and the luffing boom. The disclosure is characterized by an apparatus for assisting or for fully automatic carrying out an erecting and/or placing down procedure of a boom system comprising the main boom and the luffing boom that is configured to carry out the steps for erecting and/or placing down the boom system in dependence on the tilting moment detected by the tilting moment detection unit.

The invention relates to a control method for controlling an actuating device in a handling machine, comprising: comparing (24) a magnitude representative of the movement speed executed or to be executed in response to a movement request signal to a threshold representative of a maximum authorised speed and controlling an actuating device according to the result of said comparison, so as to: execute or sustain (25) the movement of a handling arm as long as the magnitude representative of the speed of the movement executed or to be executed is less than said threshold, and prevent or stop (26) the movement of the handling arm as soon as the magnitude representative of the speed of movement executed or to be executed is greater than said threshold.

A system control device (36): acquires the three-dimensional information of the work site, the weight of a load W, and the operating condition of the crane (1) via an input device (34) or a system-side communication device (33); upon acquiring the arrangement position and arrangement direction of the vehicle (2) at the work site via the input device (34), calculates the movable range of the crane (1) in the arrangement position and arrangement direction of the vehicle (2) taking the three-dimensional information of the work site into consideration; and overlays the image (M1) of the crane (1) and the movable range (A) on the two-dimensional image or the three-dimensional image of the work site displayed on a display device (35).

A lifting machine includes a machine chassis, a boom extending from the machine chassis, a connector extending from the boom for coupling to a load, a control system that determines a rated lifting capacity of the machine, based on an orientation of the machine chassis and a lifting load, and a display. The display indicates the rated lifting capacity relative to a total lifting capacity, and the display also indicates the lifting load relative to the rated lifting capacity and the total lifting capacity.