Abstract: This crane is provided with: a telescopic boom that can be extended; an extension device for extending the telescopic boom; a hydraulic pressure source provided in the extension device; a cylinder connection mechanism connected to the hydraulic pressure source and switching between the states of connection and non-connection with the telescopic boom on the basis of the supply and discharge of hydraulic oil; a first oil path for connecting the hydraulic pressure source and the cylinder connection mechanism; a first valve that is provided on the first oil path and switches the supply and discharge state of the hydraulic oil with respect to the cylinder connection mechanism; and a second oil path that bypasses the first valve and connects the hydraulic pressure source and the cylinder connection mechanism.

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.

Abstract: Provided is a crane capable of changing a moment on a counterweight side without changing a total weight of the crane by using a simple method. The crane includes a base, and a swiveling body that is provided above the base so as to swivel about a pivot center, and includes a boom and a counterweight attaching unit. The counterweight attaching unit includes a plurality of attaching positions, and is configured to selectively attach and detach the counterweight to and from any attaching position among the plurality of attaching positions, and the plurality of attaching positions is positions of which distances from the pivot center are different from each other.

Abstract: Provided is a crane (1) comprising: a boom (7) capable of being raised, lowered, and telescoped; a wire rope (8) being suspended from the boom (7); a winch (9) for winding and unwinding the wire rope (8); and a hook (10) being raised and lowered by the winding and unwinding of the wire rope (8). The crane further comprises a spooling operation instrument (24) for enabling commanding an operation state of the winch (9). When the hook (10) is raised to a height at which the hanging length d is a prescribed value by an operation of the spooling operation instrument (24), the boom (7) is raised and extended while the wire rope (8) is unwound such that the prescribed hanging length d is maintained, thereby sustaining the elevation operation of the hook (10).

Abstract: A crane calculates the resonance frequency of the fluctuation of a suspended load determined from the hanging length of a main wire rope or a sub wire rope, generates a control signal for actuators, in accordance with the operation of a turning operation tool, a hoisting operation tool and the like, and generates a filtering control signal for the actuators in which a frequency component in any frequency range has been attenuated from the control signal at any ratio in reference to the resonance frequency. When the actuators are controlled by the operation of the respective operation tool and when the actuators are controlled regardless of the operation of the respective operation tool, the frequency range to be attenuated and the attenuation ratio are switched to different settings.

Abstract: Provided is a crane (1) including: a boom (7); a wire rope (8); a winch (9); and a hook (10). The crane further includes: a spooling operation instrument (24) for enabling commanding an operation state of the winch (9); and switches (switch (41) or switch (42)) for enabling commanding a switch of a control mode with regard to the operation of the spooling operation instrument (24). When the boom (7) is in a flat travel orientation with the hook (10) loaded on a prescribed site (hook platform (12)), the switches ((41), (42)) being in an on state and the spooling operation instrument (24) being operated toward one side thereof cause the boom (7) to be raised to a work orientation while the wire rope (8) is unwound such that the hook (10) is not lifted.

Abstract: The work machine includes: a telescoping actuator that moves a first boom in the telescoping direction with respect to a second boom; an electrical drive source that is disposed in a movable portion of the telescoping actuator; a first connection mechanism that switches a connection state between the telescoping actuator and the first boom on the basis of the power of the electrical drive source; a second connection mechanism that switches a connection state between the first boom and the second boom on the basis of the power of the electrical drive source; and a torque limiter that is disposed between the electrical drive source and the first connection mechanism or the second connection mechanism, the torque limiter maintaining, at a predetermined value or less, a load acting on a mechanical element constituting a power transmission path from the electrical drive source.

Abstract: To estimate the top surface of a measurement target on the basis of a data point group that corresponds to the top surface of the measurement target and is obtained using a laser scanner.

Abstract: Provided is a work vehicle that can be transported by being loaded onto a trailer without having the outriggers removed. The work vehicle (rough terrain crane) is transported by being loaded onto a low bed trailer including a low bed and a high portion (first high bed, second high bed) higher than the low bed in at least one of the front and the rear of the low bed, and includes: outrigger units (front outrigger unit, rear outrigger unit) that are mounted to the front and rear of a vehicle body; and a lift unit that lifts and lowers the outrigger units (front outrigger unit, rear outrigger unit with respect to the vehicle body.

Abstract: A crane creates a 3D map on the basis of three-dimensional information acquired by a three-dimensional information obtaining section that is provided on a boom. The three-dimensional information obtaining section: is configured to be capable of accumulating acquired three-dimensional information and to be capable of changing a measurement direction, a measurement range, and a measurement density; and creates the 3D map by superimposing accumulated three-dimensional information. When an operation signal for a swivel operation for a swivel base, a hoisting operation for the boom, or an extension/retraction operation for the boom has been detected, on the basis of the movement direction and movement speed of the boom as calculated from a detected value for the operation signal, the three-dimensional information obtaining section: changes the measurement direction; and narrows the measurement range and increases the measurement density as compared to when the operation signal has not been detected.

Abstract: A system control device (36): acquires the three-dimensional information of the work site, the weight of a load W, and the operating condition of the crane (1) via an input device (34) or a system-side communication device (33); upon acquiring the arrangement position and arrangement direction of the vehicle (2) at the work site via the input device (34), calculates the movable range of the crane (1) in the arrangement position and arrangement direction of the vehicle (2) taking the three-dimensional information of the work site into consideration; and overlays the image (M1) of the crane (1) and the movable range (A) on the two-dimensional image or the three-dimensional image of the work site displayed on a display device (35).

Abstract: This expansion device is an expansion device that expands and contracts an boom, the expansion device including: a first hydraulic source that discharges a first working fluid; an expandable cylinder that has a fixed part and a movable part and is operated by the first working fluid; a second hydraulic source that is provided to the movable part, discharges the second working fluid, and is a separate hydraulic source from the first hydraulic source; a first connecting mechanism that is operated by the second working fluid and switches between a connected state and a disconnected state of the first boom element and the movable part; and a second connecting mechanism that is operated by the second working fluid and switches between a connected state and a disconnected state of the first boom element and the second boom element.

Abstract: A remote operation terminal (32) of a crane (1) provided with a GNSS receiver (30) for calculating the current position of the tip of a boom (9); acquires attitude information of the crane (1) and the current position of the tip of the boom (9) from a control device (31) of the crane (1); generates a three-dimensional image (G) of the crane (1) at the current time and planimetric features on the basis of the information acquired from the control device (31) and three-dimensional information acquired by a three-dimensional information acquisition unit (42); displays, on a display device (40), the generated three-dimensional image (G) at the position of and in the direction of a viewpoint input to a viewpoint changing operation tool (34); and generates a control signal for the crane (1) so that the tip of the boom (9) of the three-dimensional image (G) moves in a moving direction input to a suspended load.

Abstract: This remote operation terminal is provided with: an image acquisition unit that acquires an image shot by a suspended load camera; a display device that displays the image; an image rotation operation part that rotates the image; a suspended load moving operation part that sets the moving direction of the tip of a boom; and a terminal-side control device that is configured to be communicable with a control device of a crane, wherein when the image rotation operation part is operated during the operation of the suspended load moving operation part, the terminal-side control device rotates the image displayed on the display device in accordance with a rotation amount of the image rotation operation part, and rotates the moving direction of the tip of the boom set through operation of the suspended load moving operation part reversely to the rotating direction of the image displayed on the display device, by an amount of the rotation of the image.

Abstract: This work machine comprises: a telescoping actuator that moves a first boom with respect to a second boom; an electrical drive source that is disposed in a movable portion of the telescoping actuator; a first biasing mechanism that maintains the connection state between the telescoping actuator and the first boom; a first connection mechanism that switches the connection state between the telescoping actuator and the first boom on the basis of the power of the electrical drive source; a second biasing mechanism that maintains the connection state between the first boom and the second boom; a second connection mechanism that switches the connection state between the first boom and the second boom on the basis of the power of the electrical drive source; and a clutch that discretionally intermittently transmits the power of the electrical drive source to the first connection mechanism and the second connection mechanism.

Abstract: A problem to be addressed by the present invention is to provide a remote operation terminal and work vehicle comprising said remote operation terminal for enabling easy and straightforward carrying out of a remote operation of a work device. Provided is a remote operation terminal (32) of a crane device (6), said terminal comprising: a terminal-side control device (42) being a control part for controlling an operation of the remote operation terminal (32) and configured to enable communication with a control device (31) of the crane device (6); a load movement operation instrument (35) being a first operation part for remotely operating the crane device (6); and a reference change operation instrument (34) being a second operation part for setting a reference of an operation direction of the crane device (6) operated by the load movement operation instrument (35).

Abstract: A crane including a traveling body, a boom supported by the traveling body, and a camera supported by the boom, in which an image is taken by the camera, has control apparatus; a display; and a sensor for acquiring coordinates of the camera. The control apparatus acquires map information in a range of the crane, displays the map information on the display, and displays an image taken by the camera at a coordinate position of the camera on the map information.

Abstract: This wireless communication device is equipped with: a communication control unit for wirelessly connecting a work vehicle and a portable terminal with one another, an acquisition unit which is connected to a work vehicle onboard network, and acquires, from the work vehicle, work vehicle identification information for identifying the work vehicle; a generation unit for generating first character string data on the basis of the work vehicle identification information; and a setting unit for setting the generated first character string data to as a network name the communication control unit.

Abstract: A 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; and a joint that has a drive-side element fixed to a first transmission shaft that rotates on the basis of the power of the electric drive source and a driven-side element fixed to a second transmission shaft connected to the operating unit, the joint being able to take a transmission state in which both the drive-side element and the driven-side element rotate and a non-transmission state in which only either the drive-side element or the driven-side element rotates.

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.