Abstract: This work machine comprises: a plurality of booms that extend and retract with the power of an actuator; a first pin that is moved by a first spring to connect adjacent booms and is moved by power of a motor to release a connection of the adjacent booms; a second pin that is moved by a second spring to connect the boom and the actuator and is moved by power of the motor to release a connection of the boom and the actuator; and a circuit that is configured so that when the first pin is moved by the first spring or when the second pin is moved by the second spring, a current based on motor idling caused by the movement of the first pin or second pin is not generated.

Abstract: An operation assistance module operates in coordination with an operation control unit that controls the actions of a work machine, or with an operation control unit of an image generation application that controls the actions of an image of the work machine displayed on a display unit, wherein the operation assistance module has: a request issuance unit that transmits, to a performance information server, a request including machine type information for a work machine and a performance information request to indicate performance information for the work machine; a response acquisition unit that receives from the performance information server a response including the requested performance information; and an operation assistance unit that reflects the acquired performance information in the control of the operation control unit.

Abstract: Provided are a miswinding detection device and a miswinding detection method that make it possible to quickly and accurately detect miswinding. A miswinding detection device (1) has an outline detection unit (12) that detects the outline of a wire rope (3) in the rotation axis direction of a drum (2) in a captured image of the wire rope (3) as wound on the drum (2) and a determination unit (15) that calculates the degree of change in the detected outline in the radial direction of the drum (2) and determines miswinding of the wire rope (3) based on the magnitude of the calculated degree of change.

Abstract: This mobile crane comprises a boom and a traveling vehicle body for supporting the boom, and travels in a state where the boom is brought down forward. The crane has: a distance detection device which has an ultrasonic sensor disposed on the front side of the traveling vehicle body and which detects a distance between the ultrasonic sensor and a detection object; and a shielding member which is disposed between the ultrasonic sensor and the boom in a traveling state and which shields ultrasonic waves emitted from the ultrasonic sensor.

Abstract: A ground surface estimation method includes: a continuous region recognizing step for recognizing, when a difference in altitude value between a representative point of one grid and a representative point of another adjacent grid out of the plurality of grids is equal to or less than a threshold, the one grid and the other adjacent grid as a continuous region that is a region where the one grid and the other adjacent grid are continuous; and a ground surface estimation step for estimating a continuous region having the largest number of grids among the continuous regions as a ground surface.

Abstract: A remote operation terminal of a crane provided with a GNSS receiver for calculating the current position of the tip of a boom: acquires attitude information of the crane and the current position of the tip of the boom from a control device of the crane; generates a three-dimensional image of the crane at the current time and planimetric features on the basis of the information acquired from the control device and three-dimensional information acquired by a three-dimensional information acquisition unit; displays, on a display device, the generated three-dimensional image at the position of and in the direction of a viewpoint input to a viewpoint changing operation tool; and generates a control signal for the crane so that the tip of the boom of the three-dimensional image moves in a moving direction input to a suspended load moving operation tool in the three-dimensional image of the crane displayed on the display device.

Abstract: This work machine includes: an actuator that extends and retracts a telescopic boom; an electric drive source that is provided in the actuator and drives using power supplied from a power source; an operating unit that operates based on power of the electric drive source; an electric circuit capable of switching between a drive state in which a supply of power from the power source to the electric drive source is allowed to drive the electric drive source, and a braking state in which the supply of power from the power source to the electric drive source stops to generate a braking force to be applied to the electric drive source; and a control unit that controls the switching between the drive state and the braking state.

Abstract: The present invention provides a guide display device capable of recognizing a feature in a work area while distinguishing whether the feature is a moving body or not. In a guide display device of a crane, 3D maps are created for continuous frames; an altitude value for each grid in a 3D map that is created at time closest to the current time is obtained as a first altitude value; altitude values for respective corresponding grids in a predetermined number of 3D maps other than the 3D map that is created at time closest to the current time are obtained, and the average of the altitude values is calculated as a second altitude value; and it is determined that the feature is a moving body when the difference between the first altitude value and the second altitude value exceeds a predetermined threshold.

Abstract: An operation assistance module operates in coordination with an operation control unit that controls the actions of a work machine, or with an operation control unit of an image generation application that controls the actions of an image of the work machine displayed on a display unit, wherein the operation assistance module has: a request issuance unit that transmits, to a performance information server, a request including machine type information for a work machine and a performance information request to indicate performance information for the work machine; a response acquisition unit that receives from the performance information server a response including the requested performance information; and an operation assistance unit that reflects the acquired performance information in the control of the operation control unit.

Abstract: A maneuvering assistance system according to the present invention assists maneuvering of a work vehicle including a boom, said maneuvering assistance system comprising: a display that is transparent and that is capable of displaying an image; a generation unit that generates a virtual image indicating a target member including the boom and/or a member that moves together with the boom; and a control unit that displays the virtual image on the display in a superimposed manner on a landscape visible through the display in a mode in which a user of the display is capable of recognizing a position of the target member.

Abstract: The present invention provides a dynamic lift-off control device and a crane with which it is possible to quickly perform dynamic lift-off of a suspended load while suppressing vibration of the load. This dynamic lift-off control device D comprises: a boom (14); a winch (13); a load weight measurement means (22); and a controller (40) serving as a control unit, the controller (40) controlling operations of the boom (14) and the winch (13), deriving, when performing dynamic lift-off of the suspended load by hoisting the winch (13), an amount of change in a derricking angle of the boom (14) on the basis of the time change in the measured load weight, and raising the boom (14) so as to compensate for the amount of change.

Abstract: This crane is provided with a counterweight which includes an engaging part, a swivel body which is configured to be capable of swiveling, and a fixing unit which is provided on the swivel body, includes an engaged part that can connect with the engaging part, and can adopt a front position and a rear position; in each of the front position and the rear position, the fixing unit and the counterweight are linked by the engaged part being arranged in a position corresponding to that of the engaging part and being connected to the engaging part.

Abstract: Provided is a controller with high versatility that can automatically store or raise a boom and can be commonly used for various boom devices. The controller generates a function based on a length of a boom and a distance from a derrick fulcrum of the boom to an engaging member stored in a memory, and a depression angle of the engaging member with respect to the fulcrum. Then, the controller substitutes a derrick angle of the boom detected by a derrick angle sensor into the generated function to calculate a displacement distance from a distal end of the boom to the engaging member. The controller rotates a winch while raising and lowering the boom between a lowered position and a raised position such that the calculated displacement distance is a distance corresponding to an unwinding length of a wire detected by a length sensor.

Abstract: An image system is for a crane in which a boom that can be raised and lowered is provided to a vehicle with a rotating base therebetween, and said image system is provided with a plurality of vehicle body cameras provided to the vehicle, an upper camera provided to the boom, a display device, and an image processing device. The image processing device acquires vicinity images of the crane captured by the vehicle body cameras and an upper image of the crane captured by the upper camera, converts the vicinity images into images looking downward from an overhead virtual viewpoint, connects the results, generates a bird's-eye-view image, and uses the display device to display a composite image in which a supplementary image of the upper image corresponding to a missing part in the bird's-eye-view image is superimposed on the missing part.

Abstract: This work machine comprises: a first pin transitioning between an in-state where the boom and the telescopic cylinder are connected and an out-state where the connection is released; a second pin transitioning between an in state where booms are connected and an out-state where the connection is released; a main-detection device and a sub-detection device detecting the states of the first pin and the second pin; and a control unit that controls the boom based on the detection results of the main-detection device. The control unit controls the ON/OFF of a first flag indicating whether or not the main-detection device detected the combination and the ON/OFF of a second flag indicating whether or not the sub-detection device detected the combination, and detects that an abnormality has occurred in the main-detection device and sub-detection device based on the first flag and the second flag.

Abstract: The crane device includes: a camera provided on a hook; a camera control unit which controls an image-capturing operation of the camera on the basis of control information for operating a carrying element; and an image processing unit which processes a captured image that has been captured with the camera. The camera captures an image of the carrying destination of a baggage. The image processing unit takes, as a reference area, an arbitrary area in the image captured with the camera, generates a correction image obtained by projecting the captured image onto a plane that is parallel to the reference area and is perpendicular to an arbitrary direction with the baggage used as a viewpoint, calculates a current position of the baggage in the correction image, and displays the current position in a visually recognizable mode.

Abstract: There is provided a crane control method whereby, during automatic transportation of a load along a preset transport route using a crane, it is possible to reliably transport the load along the route; and a crane that can be controlled by the crane control method. A control device (32) calculates target speed signals (VU), (VW), (VR) for designating the target hoisting speed and the target rotational speed of a boom (9) and the target winding/unwinding speed of main wire rope (14) or sub wire rope (16), calculates the maximum speeds (VUmax), (VWmax), (VRmax) of the hoisting and rotation of the boom (9) and winding/unwinding of the main wire rope (14) or the sub wire rope (16), and, if a target speed exceeds the corresponding maximum speed, controls the crane (1) by multiplying the target speed signal (VU), (VW), (VR) by a coefficient and restricting the target speed signal (VU), (VW), (VR) to be less than the corresponding maximum speed.

Abstract: A crane device is capable of setting multiple types of number of rope falls between a tip of a boom and a hook block, and includes: a feed length detection unit that detects a feed length of a rope fed from a winch on which the rope is wound; a boom angle detection unit that detects a boom hoist angle; and a number-of-falls determination unit that calculates information for determining the suitability of the number of falls for the rope on the basis of the feed length, hoist angle, boom length of the boom in a state of hoisting a grounded load.

Abstract: A crane in which a boom that is capable of derricking and extending/retracting is provided to a swiveling base includes: an operable-range-setting unit that sets an operable range in which a load being transported can be transported, the operable range being set according to the weight of the load; a path generation unit that generates, within the set operable range, a plurality of nodes through which the load can pass and a plurality of paths connecting adjacent nodes; and a transport path determination unit that determines a transport path of the load on the basis of a priority sequence for actuating a plurality of actuators of the crane, the transport path satisfying a prescribed condition, and being determined from the generated plurality of nodes and plurality of paths.

Abstract: A crane information display system includes a terminal device having a camera, and obtains camera images by imaging, with the camera, a first information display unit that displays information about a crane, the crane information display system including: a crane information acquisition unit that reads, from the camera images, display information of the first information display unit to acquire information about the crane; a virtual crane generation unit that generates a virtual crane image; a position/posture calculation unit that calculates, from the camera images, a position at which the virtual crane is to be disposed and a posture to be taken by the virtual crane; an information processing unit that converts the virtual crane image into an image that corresponds to the position and the posture of the virtual crane; and an image display unit that overlays and displays the virtual crane onto the camera images.