Disclosed is a winch control apparatus for a crane, which comprises: a first compensation torque value calculation section which calculates, when a hoisting manipulation being input, based on a difference speed between a detected rotational speed and a target speed according to a manipulation amount of the hoisting manipulation, a first compensation torque value for enabling an electric motor to generate a reverse-rotation-preventing torque which is a torque in a hoisting direction and corresponding to the difference speed; and a second compensation torque value calculation section which calculates, when the hoisting manipulation being input, based on a detected load value, a second compensation torque value for enabling the electric motor to generate a load bearing torque which is a torque in the hoisting direction and necessary for bearing a load of the load value.

The present invention relates to a swivel for the reduction of twist of a rope, having two swivel parts which are rotatable with respect to one another in the longitudinal direction of the rope, wherein a rotary drive is provided for the forced rotation of the two parts with respect to one another. In accordance with the invention, at least one direction of rotation measurement unit is provided at the swivel for the detection of the direction of twist of the rope with respect to the swivel, wherein the rotary drive can be controlled by a control apparatus in dependence on the determined direction of twist such that the swivel part connected to the rope is rotated in the direction of the detected direction of twist.

The present invention relates to a swivel for the reduction of twist of a rope, having two swivel parts which are rotatable with respect to one another in the longitudinal direction of the rope, wherein a rotary drive is provided for the forced rotation of the two parts with respect to one another. In accordance with the invention, at least one direction of rotation measurement unit is provided at the swivel for the detection of the direction of twist of the rope with respect to the swivel, wherein the rotary drive can be controlled by a control apparatus in dependence on the determined direction of twist such that the swivel part connected to the rope is rotated in the direction of the detected direction of twist.

A mast arm for a large-scale manipulator is disclosed. The mast arm includes a turntable rotatable about a vertical axis, a two-point lever enclosing at least one cavity, and a plurality of mast arm segments. The plurality of mast arm segments are pivotable at articulated joints about articulation axes relative to an adjacent mast arm segment or the turntable via a respective drive unit. At least one of the respective drive units is fastened to a first mast arm segment and acts via the two-point lever on a second mast arm segment or on the turntable.

An SCR-quipped rough terrain crane in which a urea water tank is laid out at the optimal position is provided. A rough terrain crane is equipped with an exhaust emission control device that is laterally adjacent to a diesel engine. The exhaust emission control device is provided with a urea water tank and is laid out in a rear portion of at a vehicle body. The urea water tank is disposed on a front side of the exhaust emission control device. The urea water tank is disposed in the vicinity of the left side of the diesel engine when viewed from the rear side of the vehicle.

An SCR-quipped rough terrain crane in which a urea water tank is laid out at the optimal position is provided. A rough terrain crane is equipped with an exhaust emission control device that is laterally adjacent to a diesel engine. The exhaust emission control device is provided with a urea water tank and is laid out in a rear portion of at a vehicle body. The urea water tank is disposed on a front side of the exhaust emission control device. The urea water tank is disposed in the vicinity of the left side of the diesel engine when viewed from the rear side of the vehicle.

A crane having a luffing jib and a lifting cylinder includes a cylinder body and a movable rod hinged on the jib to raise and lower the jib, and a locking device adapted to cooperate with the lifting cylinder to mechanically lock the rod in a deployed holding position and block the jib in a raised holding configuration, and further including a spacer hinged on the jib and supporting an abutment, the spacer configured for pivoting between a release position wherein the spacer is offset, authorizing the movable rod to be displaced freely, and a locking position wherein the spacer is folded so that the abutment is able to bear on the cylinder body to fixedly maintain the movable rod in the deployed holding position.

A crane includes a luffing jib and a lifting cylinder having a cylinder body and a movable rod hinged on the jib to displace the jib in lifting motion and in lowering motion, and a locking device adapted to cooperate with the lifting cylinder to mechanically lock the rod in a deployed holding position and block the jib in a raised holding configuration. The crane further includes a spacer hinged on the jib and supporting a stop, the spacer pivotable between a release position in which the spacer is shifted, allowing the movable rod to be freely displaced, and a locking position in which the spacer is folded so that the stop is capable of abutting on a bearing surface in a ball jointed connection with the cylinder body, to fixedly hold the movable rod in the deployed holding position.

A lifting apparatus for a facility combining magnetic resonance imaging apparatus and radiotherapy apparatus inside a purpose-built structure having a fixed wall, the lifting apparatus comprising a wall-mounted articulating jib crane which is selectively moveable between a stowed state and a free state in which it is operable as a crane, in which substantially all of the load-bearing parts of the crane are made of non-ferromagnetic metal, and in which guides are mounted to the wall to receive and to releasably hold the crane in a fixed position relative to the wall when the crane is in the stowed state.

A lifting apparatus for a facility combining magnetic resonance imaging apparatus and radiotherapy apparatus inside a purpose-built structure having a fixed wall, the lifting apparatus comprising a wall-mounted articulating jib crane which is selectively moveable between a stowed state and a free state in which it is operable as a crane, in which substantially all of the load-bearing parts of the crane are made of non-ferromagnetic metal, and in which guides are mounted to the wall to receive and to releasably hold the crane in a fixed position relative to the wall when the crane is in the stowed state.