A transport vehicle for transporting a transportation-target object to a placement location that is provided at a lower position, includes: a supporting portion configured to support the transportation-target object; a lifting/lowering portion configured to lift and lower the transportation-target object in a suspended state; and a weight detecting portion configured to detect a weight of the transportation-target object, wherein a lowering speed of the transportation-target object is increased after a detection value that is detected by the weight detecting portion while the transportation-target object is being lowered by the lifting/lowering portion in a state where the transportation-target object is supported by the supporting portion has become smaller than or equal to a first set value, and thereafter, the supporting of the transportation-target object by the supporting portion is canceled after the suspending of the transportation-target object by the lifting/lowering portion has been canceled.

A piloting system for piloting a crane in work, including at least: a piloting interface, a control-command system connected to the piloting interface, work actuators ensuring the displacements of the load, and variable-speed drives connected to the control-command system and to the work actuators to receive piloting commands originating from the control-command system and to transmit to the work actuators speed setpoints. At least one amongst the variable-speed drives, referred to as the common variable-speed drive, is connected to at least two work actuators, referred to as the shared actuators, by a distribution relay, so that the common variable-speed drive alternately pilots each of the shared actuators.

A piloting system for piloting a crane in work, including at least: a piloting interface, a control-command system connected to the piloting interface, work actuators ensuring the displacements of the load, and variable-speed drives connected to the control-command system and to the work actuators to receive piloting commands originating from the control-command system and to transmit to the work actuators speed setpoints. At least one amongst the variable-speed drives, referred to as the common variable-speed drive, is connected to at least two work actuators, referred to as the shared actuators, by a distribution relay, so that the common variable-speed drive alternately pilots each of the shared actuators.

An overhead transport vehicle includes a lift stage to transfer an article, a winding drum to overlap and wind a suspension attached to the lift stage, and a controller to control a rotation amount of the winding drum to control a lifting/lowering amount of the lift stage. The controller is configured or programmed to execute a first processing including calculating, as individual values of the overhead transport vehicle, an individual value of an entire length of the suspension, an individual value of a diameter of the winding drum, and an individual value of a thickness of the suspension, and a second processing including calculating a rotation amount of the winding drum with respect to a lifting/lowering amount of the lift stage.

An overhead transport vehicle includes a lift stage to transfer an article, a winding drum to overlap and wind a suspension attached to the lift stage, and a controller to control a rotation amount of the winding drum to control a lifting/lowering amount of the lift stage. The controller is configured or programmed to execute a first processing including calculating, as individual values of the overhead transport vehicle, an individual value of an entire length of the suspension, an individual value of a diameter of the winding drum, and an individual value of a thickness of the suspension, and a second processing including calculating a rotation amount of the winding drum with respect to a lifting/lowering amount of the lift stage.

Various hoisting systems with anti-two-block sensing devices are provided. In one embodiment, an apparatus includes a crane having a hoisting line and an anti-two-block sensing device installed about the hoisting line. The anti-two-block sensing device includes an upper chandelier, a lower trigger assembly suspended from the upper chandelier, and a detector positioned to detect movement of the lower trigger assembly with respect to the upper chandelier. The lower trigger assembly can include two plates each having a hoisting line aperture and a slot that allows transverse installation of the plate about the hoisting line. Further, the two plates can be positioned such that their slots are offset from one another and the plates cooperate to fully surround the hoisting line. Additional systems, devices, and methods are also disclosed.

Various hoisting systems with anti-two-block sensing devices are provided. In one embodiment, an apparatus includes a crane having a hoisting line and an anti-two-block sensing device installed about the hoisting line. The anti-two-block sensing device includes an upper chandelier, a lower trigger assembly suspended from the upper chandelier, and a detector positioned to detect movement of the lower trigger assembly with respect to the upper chandelier. The lower trigger assembly can include two plates each having a hoisting line aperture and a slot that allows transverse installation of the plate about the hoisting line. Further, the two plates can be positioned such that their slots are offset from one another and the plates cooperate to fully surround the hoisting line. Additional systems, devices, and methods are also disclosed.

Various hoisting systems with anti-two-block sensing devices are provided. In one embodiment, an apparatus includes a hoisting system having a hoisting line, a sleeve positioned on the hoisting line, and an anti-two-block sensing device installed about the hoisting line so as to allow the hoisting line to move through the anti-two-block sensing device. The anti-two-block sensing device includes a detector positioned to detect a sleeve component when the sleeve is present within the anti-two-block sensing device. Additional systems, devices, and methods are also disclosed.

Various hoisting systems with anti-two-block sensing devices are provided. In one embodiment, an apparatus includes a hoisting system having a hoisting line, a sleeve positioned on the hoisting line, and an anti-two-block sensing device installed about the hoisting line so as to allow the hoisting line to move through the anti-two-block sensing device. The anti-two-block sensing device includes a detector positioned to detect a sleeve component when the sleeve is present within the anti-two-block sensing device. Additional systems, devices, and methods are also disclosed.

A brake is operationally coupled by gear engagement to an axle of a device, whereby turning on the brake prevents the axle from rotating. Monitoring condition of the brake includes driving the axle of the device in a first rotation direction when the brake has been turned on. The axle of the device is driven in a second rotation direction when the brake has been turned on. A first position angle of the axle of the device, which follows from driving the axle of the device in the first rotation direction, is measured. A second position angle of the axle of the device, which follows from driving the axle of the device in the second rotation direction, is measured. A clearance of the gear engagement of the brake is determined on the basis of a difference of the first and the second position angles.