Abstract: Provided is a control device for a wheel loader that is capable of improving the productivity of excavation work by reducing the work time required for the excavation work. A control device 120 is a control device for a wheel loader 1 that excavates a target by moving a vehicle body 2 forward with rotation of wheels 5f, 5r to plunge a bucket 3 into the target. The control device 120 moves the vehicle body 2 forward with the bucket 3 plunged into the target, and brakes the wheels 5f, 5r when a rotational speed of the wheels 5f, 5r exceeds a predetermined threshold BS.

Abstract: Provided is an unmanned work machine capable of reliably coordinating with a manned work machine and smoothly executing work. An excavating machine 100 is an unmanned work machine capable of working in coordination with a hauling machine 200 that is a manned work machine. The excavating machine 100 includes sound collectors 31a and 31b that are a receiver receiving a notification regarding the operating status of the hauling machine 200 or an operating instruction to the excavating machine 100, which are transmitted from the hauling machine 200 in response to the operation by an operator aboard the hauling machine 200, and a controller 10 that controls the operation of the excavating machine 100 in accordance with the received notification.

Abstract: A hydraulic excavator for performing cooperative work with another hydraulic excavator or a worker includes: a driving device that makes the hydraulic excavator operate; a cooperative function device that shares information about the hydraulic excavator with an inside and an outside of the hydraulic excavator; and a controller that controls the driving device that makes the hydraulic excavator operate, the controller, when there is an abnormality in the cooperative function device, controlling the driving device so as to limit operation of the hydraulic excavator, and when the hydraulic excavator is performing the cooperative work, controlling the driving device so as to make a degree of limitation on the operation of the hydraulic excavator stronger than when the hydraulic excavator is not performing the cooperative work. It is thereby possible to suppress an unnecessary decrease in work efficiency by suppressing an excessive operation limitation on the hydraulic excavator.

Abstract: Provided is an automatic operation construction machine that allows an operator to recognize in advance a start of the operation in an automatic mode when the operator switches a mode and leaves a machine body. A controller (40) does not start the operation of the machine body in an automatic control state until a remote control device (800) is operated a plurality of times in the automatic control state and the state where the operation of the machine body has not started, and the operator near the machine body is able to recognize that a non-final procedural operation, which is a non-final operation among the plurality of operations of the remote control device (800), is performed.

Abstract: The object of the present invention is to provide a constriction assistance system that can optimize the safety and the productivity in a work at a construction site. Accordingly, the construction assistance system that has a safety construction assistance function that contributes to risk reduction in regard to a worker and a work machine at a construction site includes a server that collects operation information on the work machine deployed at the construction site, and a communication network that connects the work machine with the server. The server measures an actuation count of the safety construction assistance function, calculates a safety awareness level of the worker who works at the construction site on the basis of the actuation count, and delivers the safety awareness level to a receiving device.

Abstract: An action management section 211 acquires a work instruction 230, which includes a final target position, and a current position of a work machine 100 to set a target position, a route planning section 212 generates a target route 240 between the current position and the target position, an operation generation section 213 causes the work machine 100 to travel in accordance with the target route 240, and upon receiving an evacuation instruction 250 including evacuation possible positions based on a work range of another work machine different from the work machine 100, the action management section 211 decides an evacuation position from among the evacuation possible positions based on the work range of the other work machine and at least one of the current position and final target position of the work machine 100 to set it to the target position.

Abstract: An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.

Abstract: A working status indicating a status related to the present work of a hydraulic excavator 1 is determined on the basis of operation signals output from a control lever 24, posture information output from inertial measuring devices 27 to 30, load information output from pressure sensors 32 and 33, and a work area set by a display input device 26, an operation form indicating contents of an operation in operation correction control of a front work implement 12 is decided from a plurality of operation forms set in advance, according to the determined working status, and the operation correction control is performed such that the front work implement moves according to the operation form. Thus, an appropriate assisting operation can be performed in machine control, so that the work accuracy can be improved.

Abstract: An overhead-view image of a work site is presented to an operator of a work machine even when the number of imaging devices at a construction site is lacking. The present disclosure provides an information presentation device for generating and outputting a terrain image relating to a construction site. The information presentation device includes a storage device that stores a program for performing a predetermined imaging process on the terrain image, and a processor for reading the program from the storage device and generating the terrain image.

Abstract: Provided is a work machine and a control system for the work machine capable of preventing reduction of a work efficiency when inputting a complicated work area. The work machine includes a work area setting device 501, a work machine position/attitude acquisition device 502 and a work device position/attitude acquisition device 503, a controller 500, and a designated area setting device 504. When a hydraulic excavator (work machine) 1 intrudes on a designated area 401, the controller 500 puts operation restriction control in a work area 111 to an enabled state or disabled state according to an enable or disable setting of the operation restriction control depending on the designated area 401 set in the designated area setting device 504.

Abstract: A work machine control system includes: a monitoring apparatus that detects a position and an action of a person in a monitored area set around a hydraulic excavator; and a controller that generates a control signal for limiting an action of the hydraulic excavator on the basis of a positional relation between the hydraulic excavator and a detected person detected by the monitoring apparatus, and controls the hydraulic excavator on the basis of the control signal. The controller determines which of a cooperating worker and a non-cooperating worker the detected person is, on the basis of an action of the detected person; and changes an allowable velocity of the work machine at a time of limiting an action of the work machine on the basis of a result of the determination or on the basis of the result of the determination and the action of the work machine.

Abstract: The present invention intends to provide a work machine that can execute speed control of an actuator and torque control of a swing motor by a simple configuration at the time of combined operation to simultaneously drive the swing motor and the other actuator. For this purpose, a controller calculates a pump target flow rate on the basis of an actuator target flow rate and a swing target flow rate and calculates a target meter-in opening area of an actuator directional control valve on the basis of the actuator target flow rate, a pump pressure, and an actuator meter-in pressure. The controller calculates target torque of the swing motor on the basis of the input amount of operation devices and output values of posture sensors and calculates a swing target meter-out pressure on the basis of the target torque and a swing meter-in pressure.

Abstract: Provided is an on-site monitoring apparatus and an on-site monitoring system that can appropriately set an area to be subjected to on-site monitoring. The on-site monitoring apparatus includes warning devices 104 and 309 that output a warning, peripheral object detection devices 102 and 307 that detect a position of a partition object 512, work area input devices 101 and 305 that receive an input of information indicating boundaries AB and BC to be arranged with a partition object, and control devices 103 and 308.

Abstract: An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.

Abstract: There is provided a work machine which can improve accuracy of control of an actuator when a pressure difference between a hydraulic pump and the actuator is large and the demanded flow rate of the actuator is small. An auxiliary flow rate controller is configured such that an opening area of a main valve changes between a maximum opening area and zero according to the opening area of a pilot variable restrictor when the opening area of the pilot variable restrictor is equal to or more than a predetermined opening area and that the opening area of the main valve is zero irrespective of the opening area of the pilot variable restrictor when the opening area of the pilot variable restrictor is less than the predetermined opening area.

Abstract: To provide a work machine that enables enhancement of shaping accuracy near a boundary line between two adjacent target surfaces. A controller 10 extracts, from among a plurality of target surfaces, a second target surface S2 that is a target surface adjacent to a first target surface S1, calculates a boundary line L2 between the first target surface S1 and the second target surface S2, and, prior to a work tool 6 passing the first boundary line L2, corrects a control signal for a posture control actuator 6c such that the angular difference EL between a reference line L1 set on the work tool 6 and the boundary line L2 becomes small.

Abstract: A type of an object is determined and the movement direction of the object is predicted on the basis of a sensing result of the object sensed by an on-machine obstacle sensor. Information relating to the object that is the object sensed by the on-machine obstacle sensor and has been determined to have moved to the outside of a sensing range of the on-machine obstacle sensor is immediately deleted from an environment map on the basis of the type and the movement direction of the object. This can properly process information on the object that has gotten out of the sensing range, according to the cause of the object getting out of the sensing range.

Abstract: Provided is a control system for a work machine that allows a worker in the operation around the work machine to safely approach the work machine. The control system for a work machine includes: a work machine 1 including a work implement 7, a lock mechanism 14 for the work implement 7, a lock controller 13 that controls the lock mechanism 14, and a communication device 20; and a communication terminal 30 that is able to communicate with the communication device 20 of the work machine 1. The lock controller 13 controls the lock mechanism 14 so as not to be released from a locked state in a case receiving a lock demand signal from the communication terminal 30, and controls the lock mechanism 14 so as to be released from the locked state in a case receiving a lock demand cancellation signal from the communication terminal 30.

Abstract: Provided is a control device for a wheel loader that is capable of improving the productivity of excavation work by reducing the work time required for the excavation work. A control device 120 is a control device for a wheel loader 1 that excavates a target by moving a vehicle body 2 forward with rotation of wheels 5f, 5r to plunge a bucket 3 into the target. The control device 120 moves the vehicle body 2 forward with the bucket 3 plunged into the target, and brakes the wheels 5f, 5r when a rotational speed of the wheels 5f, 5r exceeds a predetermined threshold BS.

Abstract: An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.