A control switch for operating a crane. The control switch includes a first interface designed to transfer signals between the control switch and a control unit of the crane. In order to combine, in particular, the robustness and operating reliability of the control switch desired in industrial use with increased functional scope in a cost-effective way, the control switch is provided with a second interface designed to transfer signals between a mobile terminal and the control switch in order to add functions of the mobile terminal to the functional scope of the control switch.

A hydraulic crane comprising: a rotatable column (7); a crane boom system comprising a first crane boom (11) connected to the column; and an electronic control device for controlling the movement of the column and the crane boom system on the basis of control signals from a manoeuvring unit and a calculation model for boom tip control. The control device is configured to switch from a first control mode into a second control mode when the first crane boom is about to interfere with an obstacle. In the first control mode, the control device controls the crane boom movements in accordance with an ordinary control strategy. In the second control mode, the control device makes the load suspension point (P) of the crane boom system move along the trajectory defined by said control signals while controlling the crane boom movements in accordance with an auxiliary control strategy in which the first crane boom is prevented from interfering with the obstacle.

A hydraulic crane comprising: a rotatable column (7); a crane boom system comprising a first crane boom (11) connected to the column; and an electronic control device for controlling the movement of the column and the crane boom system on the basis of control signals from a manoeuvring unit and a calculation model for boom tip control. The control device is configured to switch from a first control mode into a second control mode when the first crane boom is about to interfere with an obstacle. In the first control mode, the control device controls the crane boom movements in accordance with an ordinary control strategy. In the second control mode, the control device makes the load suspension point (P) of the crane boom system move along the trajectory defined by said control signals while controlling the crane boom movements in accordance with an auxiliary control strategy in which the first crane boom is prevented from interfering with the obstacle.

The present invention is provided with: a manipulation unit; a winch device that operates with an actuation mode of either a high speed mode or a low speed mode, and winds in or reels out a wire rope; a selection unit for an operator to select either the high speed mode or the low speed mode; a load calculation unit calculating a suspended load; a tension calculation unit calculating the tension of the wire rope; and a control unit controlling the actuation of the winch device. If the mode selected by the selection unit is the high speed mode, the manipulation unit is manipulated from a neutral state to a non-neutral state, and the suspended load is smaller than a load threshold and the tension is smaller than a tension threshold, the control unit controls the winch device so as to operate in the high speed mode.

An apparatus for preventing a remote operation terminal from being mislaid, the remote operation terminal remotely operating a work machine driven via a PTO device in a vehicle, the apparatus being configured so as to have: a reception device for receiving a wireless signal transmitted by a transmission device provided to the remote operation terminal, the reception device being provided to the vehicle; a determination section that, when the PTO device is in an OFF state, determines whether or not the reception strength of the wireless signal received from the transmission device by the reception device is equal to or less than a prescribed threshold value; and a notification section for issuing a notification when the reception strength is equal to or less than the prescribed threshold value.

An apparatus for preventing a remote operation terminal from being mislaid, the remote operation terminal remotely operating a work machine driven via a PTO device in a vehicle, the apparatus being configured so as to have: a reception device for receiving a wireless signal transmitted by a transmission device provided to the remote operation terminal, the reception device being provided to the vehicle; a determination section that, when the PTO device is in an OFF state, determines whether or not the reception strength of the wireless signal received from the transmission device by the reception device is equal to or less than a prescribed threshold value; and a notification section for issuing a notification when the reception strength is equal to or less than the prescribed threshold value.

A system for controlling and/or monitoring and/or visualizing construction sites, including a detection device for detecting the position of a construction unit at the construction site, wherein the detection device includes a signal transmitter to be mounted on the construction unit for providing an identification signal identifying the construction unit, and a signal evaluation device for receiving and evaluating the identification signal in order to determine the position of the construction unit at the construction site. The signal evaluation device includes at least one loop antenna that is laid at the construction site for receiving the identification signal of the signal transmitter and for determining the position of the signal transmitter.

A compact wireless remote control for the wireless remote control of a machine is described, having an upper-face operating surface having a display device and at least one free space which is below the upper-face operating surface so as to be at least partly covered by same, is open towards the outside at least laterally on one side, and is delimited by wall portions of the wireless remote control. At least one operating element which can be actuated by an operator at least from the open lateral side of the free space is provided on at least one of said wall portions on the free space side. The free space is preferably formed continuously from one lateral side to the other lateral side and is open at both lateral sides. At least one operating element in each case can be manually accessed from each open lateral side for actuation.

A compact wireless remote control for the wireless remote control of a machine is described, having an upper-face operating surface having a display device and at least one free space which is below the upper-face operating surface so as to be at least partly covered by same, is open towards the outside at least laterally on one side, and is delimited by wall portions of the wireless remote control. At least one operating element which can be actuated by an operator at least from the open lateral side of the free space is provided on at least one of said wall portions on the free space side. The free space is preferably formed continuously from one lateral side to the other lateral side and is open at both lateral sides. At least one operating element in each case can be manually accessed from each open lateral side for actuation.

Disclosed herein is a controller of a hoist. The controller of the hoist includes a lift up button which is adjustable in a pressed degree; a lift down button which is adjustable in a pressed degree; a lift up switch disposed below the lift up button so as to be immediately operated when the lift up button is pressed; a lift down switch disposed below the lift down button so as to be immediately operated when the lift down button is pressed; a magnet body connected to both of the lift up button and the lift down button and disposed to descend during a pressing operation of the lift up button or the lift down button; and a Hall sensor disposed to correspond to the magnet body so as to detect a descending degree of the magnet body being pressed by the lift up button or the lift down button.