An overhead transport vehicle includes: a winding drum configured to be driven by one driving motor, and to cause a holding unit to be lifted and lowered by winding and paying out a plurality of belts; at least one second idler roller around which the belt paid out from the winding drum is wound; a base provided on a traveling unit, and configured to support the winding drum and the second idler roller; and a linear motion mechanism configured to move a position of the at least one second idler roller so that a connecting portion of the belt to the holding unit moves in a lifting direction.

The present disclosure relates to an apparatus and to a method for controlling a crane slewing gear. The apparatus comprises a hydraulic motor for driving the slewing gear and for braking the slewing gear from a rotational movement. The slewing gear is kept stationary via a holding brake. A hydraulic brake circuit for controlling the holding brake, a load sensing device for measuring a load instantaneously taken up by the crane, and an orientation sensing device for measuring an instantaneous orientation of the crane and/or of at least one crane component are furthermore provided. In accordance with the disclosure, a hydraulic limitation circuit is provided by means of which a hydraulic pressure applied to the motor can be limited to a specific limit value. A control unit is furthermore provided that determines a maximum permitted torque and/or a parameter derived therefrom for a current slewing gear movement.

A device includes a bevel pinion meshed to a bevel ring in rigid fixation with a pinion gear engaged with a slew ring to control rotation of the slew ring. A rotation sensor provides an electrical output corresponding to a rotational position of an input gear of the rotation sensor. A reduction gearing system interposes the bevel ring and the input gear of the rotation sensor. The gearing reduction system provides a reduction ratio enabling the rotation sensor to determine rotational position of the slew ring.

A crane for transporting a load from a transportation origin to a transportation destination, the crane being provided with: an operation function unit provided so as to be turnable; a hook suspended by a wire rope from a distal end part of the operation function unit; an information-reading unit provided to the hook or a member that moves with the hook, the information-reading unit acquiring information relating to a position of the transportation destination from an information storage unit provided to the load; a control unit for calculating, on the basis of the information relating to the position acquired from the information-reading unit, information relating to an operation of the crane for transporting the load to the transportation destination; and a display unit for displaying the information relating to the position and the information relating to the operation.

A management system includes: a plurality of machine tools each including a base plate; a plurality of storage plates; an object holder enabling an object to be placed thereon; a conveying unit including a fetching unit that is configured to secure or release said object holder, and a bridge crane that is configured to move the fetching unit among the base plates and the storage plates; and a control unit controlling the bridge crane to move the fetching unit to where the object holder is located, and controlling the fetching unit to secure the object holder, and controlling the bridge crane to move the fetching unit along with the object holder to another location to release the object holder.

A system includes a hoist drive mechanism that elevates and lowers a load hook from a boom and a detector that provides obstacle location and identification information. A processor receives the obstacle location and identification information from the detector and provides obstacle avoidance data in response thereto.

A system includes a hoist drive mechanism that elevates and lowers a load hook from a boom and a detector that provides obstacle location and identification information. A processor receives the obstacle location and identification information from the detector and provides obstacle avoidance data in response thereto.

A lifting rig includes a cradle and a load transfer device. The load transfer device is arranged to draw in a payload to the cradle or deliver a payload from the cradle. The lifting rig is arranged to be lifted to an elevated space and the load transfer device is arranged to draw in or deliver the payload within the elevated space.

Tower crane (1) comprising a tower (2) on which a rotating portion (3) is pivotally mounted and configurable between a service configuration in which the rotating portion can be rotatably driven by means of a motorized orientation system (40), and an out of service configuration in which the rotating portion is rotatably released to be able to be oriented in the direction of the wind, where a control/command unit (5) activates a monitoring mode in the out of service configuration to detect, depending on variations in the angle of orientation or the angular speed of the rotating portion, if the rotating portion is in one of the following instability states: an autorotation state corresponding to a rotary movement of the rotating portion in a given direction over at least one complete turn; or an oscillation state corresponding to a back and forth movement of the rotating portion about the orientation axis.

A crane vehicle capable of preventing another vehicle from coming into contact with a tip end portion of a boom when entering an intersection includes a controller that detects an obstacle on a lateral side of a tip end portion of a boom by using left and right cameras when the vehicle enters an intersection or the like. When it is determined that a detected obstacle may come into contact with the tip end portion of the boom, the controller drives a brake device to stop a crane vehicle, and causes a speaker to output a warning sound. When it is determined that there is no risk of contact with the boom as the detected obstacle stops, or moves away from the crane vehicle by turning left or right, or passing an intersection, the controller releases the driving of the brake device to enable travelling of the crane vehicle.