Abstract: A storage stores at least one piece of registered correction data including a plurality of registered values associated with a plurality of section angle ranges. A controller executes parallel winch control of causing a derricking winch and a hoisting winch to operate. The controller specifies a reference target value corresponding to a derricking angle, from the plurality of registered values. In a correction period corresponding to a point of time at which a correction operation is detected, the controller corrects the reference target value used for deriving an operation speed of the hoisting winch in the parallel winch control, in accordance with a specified value specified by the correction operation. The controller updates data of the reference target value corresponding to the correction period to data corrected with the specified value.

Abstract: A work machine is capable of inhibiting an unintended machine motion and reducing energy consumption. The work machine includes a controller, a drive source, a controller switch to which an on-operation and an off-operation are applied, a lock operation member to which a lock operation and a lock release operation for invalidating and validating a lever operation, respectively, are applied, and a drive source switch to which a start operation and a stop operation for starting and stopping the drive source, respectively, are applied. After activated by the on-operation applied to the controller switch, the controller starts the drive source when judging that the lock-release operation is applied to the lock operation member and the start operation is applied to the drive source switch, whereas suspends starting the drive source when judging that both the lock-release operation and the start operation has not been applied.

Abstract: A drive control device for a construction machine includes a controller that controls the movement of a work device. The controller sets a target land leveling angle, which is a target for a land leveling angle in land leveling work performed by the work device, calculates a pivoting member gravity center velocity, which is the velocity of the center of gravity of a pivoting member, calculates a target velocity, which is a target for a velocity of the composite center of gravity of the entire work device by using the pivoting member gravity center velocity and the target land leveling angle, and controls the movement of a boom to make the actual velocity of the composite center of gravity closer to the target velocity.

Abstract: When an engine is started in a state where a support member of a multi-coupler is attached to a mating support member, the pressure of hydraulic oil increases in a detection target pipeline part. A pressure detection unit detects the pressure of the hydraulic oil in the detection target pipeline part. A connection state determining unit determines whether a tank-side pipeline part and a motor-side pipeline part are connected to each other, based on the pressure. When the connection state determining unit determines that the tank-side pipeline part and the motor-side pipeline part are not connected to each other in a state where the engine is started, a pressure increase suppression unit carries out an operation for suppressing an increase in the pressure of a hydraulic motor.

Abstract: A prework manipulation or a post-work manipulation for a crane is facilitated. A controller executes a boom raising control in response to a first raising manipulation under a condition that a start mode is set. The controller executes a jib swing out control in response to a second raising manipulation. The boom raising control includes making the controller cause a second winch to wind up a second rope when a detection value from a jib tension force detector falls below a permissible range. The jib swing out control includes making the controller cause the second winch to wind up the second rope.

Abstract: A system for performing automatic operation of a work machine includes an automatic operation part, a work upper limit position setting part and a work position shifting part. The automatic operation part makes the attachment perform a series of motions including a motion of moving a control target position of the tip end attachment along a target path over a plurality of cycles, through an automatic operation. The work upper limit position setting part sets a work upper limit position. The work position shifting part shifts the work position in an up-down direction in accordance with the advance of the series of motions. The work position shifting part sets the work position in the series of motions in the first cycle to be performed first after setting of the work upper limit position to a position on a lower side of the work upper limit position.

Abstract: A system including an automatic operation part, a work position shifting part and a target path correction part. The automatic operation part performs a control of making the attachment perform a series of motions including a motion of moving a control target position along a target path over a plurality of cycles, through an automatic operation. The work position shifting part shifts the work position in at least one of an up-down direction and a front-rear direction of the attachment in accordance with the advance of the series of motions over the plurality of cycles. The target path correction part corrects a portion of the target path between a path end position and the work position in accordance with the shift of the work position by the work position shifting part.

Abstract: Provided is a server and a system that can assist an operator in recognizing whether or not a work machine in a work-site birds-eye image output on an output interface constituting a remote operation device is subject to remote operation by the remote operation device. According to the captured image acquired through the image pickup device C, when a work machine 40 is in the work-site birds-eye image that is output on an output interface 220 constituting a remote operation device 20, whether or not the work machine 40 is a connection-target work machine is determined. If the determination result is positive, a first sign image ID1 associated with an actual machine image Q2 that represents the work machine 40 in the work-site birds-eye image is displayed on the output interface 220 of the remote operation device 20.

Abstract: A work area setting system includes a first straight line setting part, a second straight line setting part and an area setting part. The first straight line setting part sets a first straight line that is parallel to a motion surface of an attachment in a plan view and passes through a first point at which the tip of an attachment is located with an upper turning body oriented in a first direction. The second straight line setting part sets a second straight line that is parallel to the motion surface in the plan view and passes through a second point at which the tip of the attachment is located with the upper turning body oriented in a second direction different from the first direction. The area setting part sets an area between the first straight line and the second straight line in the plan view as a work area.

Abstract: A diagnostic device for an exhaust gas aftertreatment device includes a temperature detection device that detects a filter inlet-side temperature and a filter outlet-side temperature, a differential pressure detection device that detects a differential pressure between a filter inlet-side pressure and a filter outlet-side pressure, an intake air pressure detection device that detects an intake air pressure of an engine, and a controller that determines a malfunction in an exhaust gas aftertreatment device based on values detected by the temperature detection device, the differential pressure detection device, and the intake air pressure detection device.

Abstract: According to the remote operation system or a remote operation server 20 included in the remote operation system, a “communication resource allocation process” is performed according to the skill or the like of the operator to allocate communication resources to a plurality of remote operation devices 10. When the “environment information control process” is performed, a data amount of environment data is reduced such that a reduction in the information amount of one or a plurality of low environment information factors is greater than the reduction in the information amount of one or a plurality of high environment information factors (meaning the reduction in the information amount of the environment information due to a change in the environment information factor). The environment information control process is performed in different modes according to a difference in an allocation resource.

Abstract: A server causes an information terminal device to display a selection image for allowing an operator to select a desired operation among one or more operations and a desired master device among one or more master devices based on operation request information stored in a first database and master device information stored in a second database. The information terminal device sends to the server a selection instruction of the operator who selects the desired operation and the desired master device via the selection image. The server receives an operation order acceptance of the operator by storing, in an operation plan database, an operator ID, a master device ID and the operation designated by the selection instruction in combination with one another.

Abstract: A controller includes a drive part, a posture information acquisition part, and a control part, the control part calculates a gravity center velocity of a working device on the basis of posture information about the working device detected by the posture information acquisition part and calculates a target gravity center velocity being a target value of the gravity center velocity on the basis of a difference between a grounding work to be exerted to the ground by the working device and a target grounding work, and provides a feedback correction to an instruction signal to make the gravity center velocity approach the target gravity center velocity and inputs the corrected instruction signal into the drive part.

Abstract: Provided is an assembly method for a crane, by which method a crane including a strut can be assembled easily. The assembly method for the crane includes a strut coupling step of coupling a base end of a strut, a cylinder connecting step of extending a cylinder unit having one end supported by the strut, the cylinder unit being capable of extending/contracting, to connect the other end of the cylinder unit to the boom, a strut raising step of causing the cylinder unit to contract to raise the strut, and a strut supporting step of stretching a stretching member, such as a rear side guy line or a luffing cable, between a front end of the strut and a base end of the boom to support the strut in a raised state.

Abstract: It is possible to notify an operator of a change in radio wave intensity in addition to the radio wave intensity received by a remotely operating vehicle. A radio wave is transmitted to and received from a vehicle to operate the vehicle. A communication device 14 includes a display unit 21 configured to display information, in which the display unit 21 is capable of displaying a first image 22 representing first radio wave intensity which is radio wave intensity of a radio wave being currently received by the vehicle, and a second image 32 representing information on a change in the first radio wave intensity.