An inner face of a flange of a winch drum is provided with a rope guide part that guides a rope portion in a higher layer such that the rope portion in the higher layer crosses a rope portion in a lower layer in a first crossing section, and a ridge line of the rope guide part has a shape that is displaced in a winding rotation direction with respect to a baseline passing through a rotation axis and an inner edge of the ridge line as proceeding from the inner edge to an outer edge.

An inner face of a flange of a winch drum is provided with a rope guide part that guides a rope portion in a higher layer such that the rope portion in the higher layer crosses a rope portion in a lower layer in a first crossing section, and a ridge line of the rope guide part has a shape that is displaced in a winding rotation direction with respect to a baseline passing through a rotation axis and an inner edge of the ridge line as proceeding from the inner edge to an outer edge.

A mobile crane has an undercarriage, a superstructure arranged on the undercarriage, a slewing gear by which the superstructure may be rotated relative to the undercarriage, a slewing gear brake that acts on the slewing gear to brake a rotation of the superstructure, and a jib mounted on the superstructure as to be adjustable in luffing angle and/or in length. The mobile crane additionally contains a dolly coupling arranged on the jib and by which the jib is coupled to a mobile crane dolly during dolly travel with the superstructure in an extended position. The mobile crane further has a sensor interface for connecting a dolly coupling sensor, and a controller that is adapted to ascertain during dolly travel, in dependence on a signal received from the dolly coupling sensor, whether the jib rests on the mobile crane doll, and to activate the slewing gear brake if it does not.

A method for ascertaining the load capacity of a functional element of a crane, the load capacity of a sub-assembly of a crane or the load capacity of a crane, wherein: a maximum bearing load is calculated for a specifically occurring configuration and/or specifically occurring state parameters and/or specifically occurring operating parameters on the basis of a predetermined formula; and the calculation is verified on the basis of stored bearing load values.

The invention relates to a loading device, wherein the loading device comprises a gantry (6) and a platform (5) which is mounted on the gantry (6). A pylon (1) is arranged at a base point (7) on the platform (5). A jib extends out from the pylon (1). The pylon (1) can be rotatably connected to the platform (5). The platform (5) defines a vertical axis (8) which extends in the vertical direction and runs through the base point (7). The pylon (1) is curved in a region adjoining the platform (5) and intersects the vertical axis (8) at an angle (a). The invention further comprises a pylon (1) for a loading device.

The invention relates to a loading device, wherein the loading device comprises a gantry (6) and a platform (5) which is mounted on the gantry (6). A pylon (1) is arranged at a base point (7) on the platform (5). A jib extends out from the pylon (1). The pylon (1) can be rotatably connected to the platform (5). The platform (5) defines a vertical axis (8) which extends in the vertical direction and runs through the base point (7). The pylon (1) is curved in a region adjoining the platform (5) and intersects the vertical axis (8) at an angle (a). The invention further comprises a pylon (1) for a loading device.

The present invention provides a work machine in which load shaking of a crane in emergency can be prevented. In the work machine, a turning body is disposed to be turnable relative to a base body. The work machine includes a drive control unit which controls a turning operation of the turning body, and a detection unit which detects an obstacle present around the turning body. The drive control unit does not start turning of the turning body in a case where the obstacle is detected by the detection unit while the turning of the turning body is stopped, and maintains the turning of the turning body for at least a predetermined period in a case where the obstacle is detected by the detection unit during the turning of the turning body.

The present invention provides a work machine in which load shaking of a crane in emergency can be prevented. In the work machine, a turning body is disposed to be turnable relative to a base body. The work machine includes a drive control unit which controls a turning operation of the turning body, and a detection unit which detects an obstacle present around the turning body. The drive control unit does not start turning of the turning body in a case where the obstacle is detected by the detection unit while the turning of the turning body is stopped, and maintains the turning of the turning body for at least a predetermined period in a case where the obstacle is detected by the detection unit during the turning of the turning body.

A tower crane for assembling a wind turbine includes a boom assembly including a boom and a hoisting block coupled to the boom, an extendable tower assembly including a plurality of tower sections, and a transport assembly including a central support frame coupled to the tower assembly, a self-propelled transporter configured to transport the tower crane, and a diagonal brace extending between the central support frame and the transporter, wherein the diagonal brace includes a linear actuator configured to selectably extend and retract the diagonal brace.

A tower crane for assembling a wind turbine includes a boom assembly including a boom and a hoisting block coupled to the boom, an extendable tower assembly including a plurality of tower sections, and a transport assembly including a central support frame coupled to the tower assembly, a self-propelled transporter configured to transport the tower crane, and a diagonal brace extending between the central support frame and the transporter, wherein the diagonal brace includes a linear actuator configured to selectably extend and retract the diagonal brace.