Abstract: Provided is a crane that can detect obstacles within a sufficient range while traveling and while doing work. A crane that is provided with an obstacle sensor that, during travel, detects the approach of obstacles toward a front side part of a travel body and, during work, detects the approach of obstacles toward a rear side part of a turning body. According to a first embodiment, the obstacle sensor has a detection range that is directed from front to rear. According to a second embodiment, the obstacle sensor has a detection range that is directed from rear to front.

Abstract: The present invention is configured so that it is possible to select any one of a first mode in which a first adjustment valve 13 and a second adjustment valve 20 operate solely on the basis of manipulation of a main manipulation tool (turning lever 8i), a second mode in which the first adjustment valve 13 operates solely on the basis of manipulation of the main manipulation tool (8i) and the second adjustment valve 20 operates solely on the basis of manipulation of a secondary manipulation tool (brake pedal 8j), and a third mode in which the first adjustment valve 13 operates solely on the basis of manipulation of the main manipulation tool (8i) and the second adjustment valve 20 operates on the basis of manipulation of the secondary manipulation tool (8j) while operating on the basis of manipulation of the main manipulation tool (8i).

Abstract: An expansion/contraction mechanism includes a telescopic cylinder, boom fixing means, cylinder-boom connecting means, and a hydraulic-pressure supply unit, and telescopes a plurality of booms except a base boom by telescoping the telescopic cylinder. The hydraulic-pressure supply unit includes a pneumatic-pressure source, a selector valve which selects a destination of air provided from the pneumatic-pressure source, a first pneumatic path through which first air sent from the selector valve circulates, a second pneumatic path through which second air sent from the selector valve circulates, a first pneumatic-to-hydraulic conversion unit which converts a pneumatic pressure provided by the first air to a hydraulic pressure and supplies the hydraulic pressure to a first hydraulic cylinder, and a second pneumatic-to-hydraulic conversion unit which converts a pneumatic pressure provided by the second air to a hydraulic pressure and supplies the hydraulic pressure to a second hydraulic cylinder.

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: A working machines capable of securing safety while enabling remote operation is a working machine configured to be capable of communicating with a remote operation device (40), and includes a communication unit (70a) that receives a manipulate signal from the remote operation device (40), a control unit (70) that controls actuators (51 to 59) mounted in the working machine according to manipulate signals from main operation devices disposed in a cab of the working machine or the remote operation device (40). In a case where a state of the working machine does not fulfill a predetermined condition, the control unit (70) does not allow the remote operation of at least one of the actuators (51 to 59) by the remote operation device (40).

Abstract: A remote operation terminal is provided with: a terminal-side control device configured so as to be capable of communicating with a control device, the terminal-side control device being a control unit for controlling the actuation of the remote operation terminal; a suspended load movement operation tool, which is a first operation unit for remotely operating a crane device; and a reference change operation tool, which is a second operation unit for setting an operation direction reference of the suspended load movement operation tool in relation to a vehicle direction reference of a crane. The terminal-side control device calculates the actuation direction of the crane device in relation to the operation of the suspended load movement operation tool, on the basis of a setting value of the reference change operation tool, and transmits the actuation direction to the control device.

Abstract: Provided is a surrounding display device for a traveling crane, whereby the positional relationship between surrounding objects and a boom can be easily understood. This surrounding display device (A) is for a traveling crane (100) equipped with a traveling vehicle body (101) and a boom (105), the surrounding display device (A) being equipped with: cameras (1L), (1R) provided to the leading end of the boom (105); a control device (2) connected to the cameras (1L), (1R); and a monitor (3) connected to the control device (2). The control device (2) superimposes the positional information of the boom (105) on the images photographed with the cameras (1L), (1R) and displays the result on the monitor (3). Thus, the positional relationship between surrounding objects and the boom (105) can be easily understood.

Abstract: Provided is a crane that can detect obstacles within a sufficient range while traveling and while doing work. A crane that is provided with an obstacle sensor that, during travel, detects the approach of obstacles toward a front side part of a travel body and, during work, detects the approach of obstacles toward a rear side part of a turning body. According to a first embodiment, the obstacle sensor has a detection range that is directed from front to rear. According to a second embodiment, the obstacle sensor has a detection range that is directed from rear to front.

Abstract: A remote operation device capable of providing, to the operator, guidance of a work content to be performed by manual work or remote operation on the work machine in accordance with a state of the work machine, is a remote operation device (40) configured to be capable of communicating with the work machine, and includes: an operation unit (42) that generates an operation signal for performing remote operation of the work machine in accordance with operator's operation; a reception unit (40a) that receives detection signals of detection devices (81 to 84) that detect the state of the work machine; and a display unit (43) that displays a screen indicating a work content to be performed by manual work or the remote operation on the work machine on the basis of the received state of the work machine.

Abstract: Provided is a work-machine erroneous forward/backward travelling operation notifying device capable of improving safety by notifying, when a travel direction inputted to an operation input unit does not conform to the condition of a transmission clutch, an operator of the non-conformance. Whether the conditions of clutches 121 to 124 conform to a travel direction inputted to a selection lever 141 is determined on the basis of a pressure Pf sensed by a first pressure sensor 133a or a pressure Pr sensed by a second pressure sensor 134a and the travelling direction inputted to the selection lever 141. When it is determined that the conditions of the clutches 121 to 124 do not conform to the travel direction inputted to the selection lever 141, a vehicle 10 is notified that an erroneous operation will occur.

Abstract: A boom attitude detection device is equipped with: a GPS device that measures the position of the leading end of the boom; attitude detectors and that detect the attitude of the boom; and a calculation device. If the positioning reliability of the GPS device is high, the calculation device determines a correction value for correcting detection values of the attitude detectors to the attitude of the boom determined from the positioning value of the GPS device. If the positioning reliability of the GPS device is low, the calculation device corrects the detection values of the attitude detectors using correction values and determines the attitude of the boom.

Abstract: A slewing apparatus includes a control section that performs at least a slewing angular velocity pattern determination process. In the slewing angular velocity pattern determination process, the slewing angular velocity pattern is determined such that in a first interval and a second interval of a control time T that is shorter than a cycle determined by a pendulum length of a suspended load that is in a pendulum motion, a difference between a maximum angular velocity and a minimum angular velocity increases as the control time T decreases.

Abstract: The bird's-eye view image system is provided with a plurality of cameras for acquiring a surrounding image of the work vehicle, a display unit for displaying a bird's-eye view image based on the image acquired by the plurality of cameras, and a control unit for causing a bird's-eye view image to be generated and displayed by the display unit. The plurality of cameras have a first front camera provided in the traveling body for acquiring an image ahead of the travelling body, a first rear camera provided in the traveling body for acquiring an image backward of the traveling body, a right camera provided on the swivel base for acquiring an image rightward of the swivel base, and a left camera provided on the swivel base for acquiring an image leftward of the swivel base.

Abstract: A working vehicle is provided with a traveling vehicle, a working section which is supported on a rotatable base, an operator's cab, and a connection section. The connection section includes: a connection section body which connects the rotatable base and the operator's cab and which is provided so as to be capable of pivoting about a base-side connection section connected to the rotatable base and about the operator's cab-side connection section connected to the operator's cab; and a pivot control section which extends so as to always intersect the connection section body in the range of pivoting of the connection section body, connects the rotatable base and the operator's cab, and is provided so as to be capable of pivoting about a base-side connection section connected to the rotatable base and about an operator's cab-side connection section connected to the operator's cab.

Abstract: A mobile crane is configured so that a boom is raised by a derrick cylinder in response to a raise signal output from a derrick lever and the derrick cylinder is stopped in response to the derrick angle of the boom reaching the maximum angle ? corresponding to the hoisted-down length of a rope.

Abstract: The overhanging storage mechanism for a jib is provided with: a guide roller (31) provided to a jib (15); a guide (32) provided to a base end boom (14a); a jib-fixing pin (43) provided to the base end boom (14a); and a pin socket (45) that is provided to the jib (15) and that comprises insertion holes (48), (49). The jib-fixing pin (43) and the insertion holes (48), (49) are arranged so that the jib-fixing pin (43) is inserted in the insertion hole (48) when the jib (15) moves along the base end boom (14a) together with contraction of a boom (14). The inner dimensions of a front end opening (48) are larger than the outer dimensions of the jib-fixing pin (43). It is thus possible to absorb positional displacement between the jib-fixing pin (43) and the insertion hole (48).

Abstract: Provided is a work-machine erroneous forward/backward travelling operation notifying device capable of improving safety by notifying, when a travel direction inputted to an operation input unit does not conform to the condition of a transmission clutch, an operator of the non-conformance. Whether the conditions of clutches 121 to 124 conform to a travel direction inputted to a selection lever 141 is determined on the basis of a pressure Pf sensed by a first pressure sensor 133a or a pressure Pr sensed by a second pressure sensor 134a and the travelling direction inputted to the selection lever 141. When it is determined that the conditions of the clutches 121 to 124 do not conform to the travel direction inputted to the selection lever 141, a vehicle 10 is notified that an erroneous operation will occur.

Abstract: Provided is a jib connection structure for restraining a projectable/retractable jib from swinging sideways in a state where the jib is suspended from a boom tip end part, the jib connection structure including: jib connection shafts projecting horizontally toward both sides from a boom tip end part; and jib base end engagement parts respectively provided to bifurcated jib base end parts. Each jib base end engagement part is U-shaped into which the jib connection shaft can be fitted, and is provided with an insertion hole into which a pin for preventing the jib connection shaft from slipping out is inserted. The insertion hole in one jib base end engagement part is arranged more toward the outside than a U-shaped bottom part. When a jib is suspended from the boom tip end part, the left and right pins engage with the respective jib connection shafts, and the jib is suspended at two points.

Abstract: The overhanging storage mechanism for a jib is provided with: a guide roller (31) and a pin socket (45) that are provided to a jib (15); and a guide (32) and a jib-fixing pin (43) that are provided to a base end boom (14a). The guide (32) comprises a first raceway surface (34s) that pulls the jib (15) toward the bottom surface of the base end boom (14a) as a result of rolling of the guide roller (31), a second raceway surface (35s) on which the jib (15) moves along the base end boom (14a), and a protruding third raceway surface (36s) that protrudes from the second raceway surface (35s). The jib (15) is pulled further toward the bottom surface of the base end boom (14a) by rolling of the guide roller (31) on the third raceway surface (36s).

Abstract: An SCR-quipped rough terrain crane in which a urea water tank is laid out at the optimal position is provided. A rough terrain crane is equipped with an exhaust emission control device that is laterally adjacent to a diesel engine. The exhaust emission control device is provided with a urea water tank and is laid out in a rear portion of at a vehicle body. The urea water tank is disposed on a front side of the exhaust emission control device. The urea water tank is disposed in the vicinity of the left side of the diesel engine when viewed from the rear side of the vehicle.