Hitachi Construction Machinery Co., Ltd.

Keiichirou Anahara

Kazuhiko Mizoguchi

Naoki Hagiwara

Shinji Nishikawa

Akihiro Narazaki

Shigeru Hirasawa

Keitaro Ito

There is provided a construction machine capable of performing hanging work according to the intention of an operator. A hydraulic excavatorincludes: an operating leverfor performing a turning operation; the camerasfor detecting any obstacle; and a controllerfor controlling the operations of a vehicle body and a front working device. In the hydraulic excavator, in a case where the obstacle is detected by any of the cameras, the controllerperforms an operation limiting process. The hydraulic excavatorfurther includes a hookA, a mode selector switchfor switching the operation to a hanging work mode. In a case where the obstacle is detected by any of the cameras, the controllerdisables the operation limiting process and controls the operation of the vehicle body or the front working deviceaccording to the manipulated variable of the operating lever

Construction machine including a controller performing an operation limiting process for limiting an operation for moving a working device of the construction machine

A hydraulic excavator includes: operation devices that output, based on operation by an operator, operation signals to operate a lower travel structure, an upper swing structure, and a front work implement; solenoid valves, andthat limit the operation signals outputted from the operation devices; and a controller that controls the solenoid valves based on detection signals from sensors, and that detect objects in the surroundings of a machine body. The detection ranges of the sensors, and include a first detection range TR defined based on travel performance of the lower travel structure and a second detection range SW defined to be along a swing radius of a rear end of the upper swing structure. As a result, the influence of excessive alarm on the working operator can be reduced while enhancing detection accuracy by setting the detection range according to action range of the work machine.

Work machine

A work machine includes a sensor that detects a retroreflective material and other objects in a distinguishable manner, a solenoid valve that restricts an operation signal outputted from an operation device, and a controller configured to control the solenoid valve based on the detection result. The controller controls the solenoid valve based on information concerning whether or not the object detected by the sensor is a retroreflective material and information concerning whether a position of the object detected by the sensor is in a first detection region at least partially including an operation range of a machine body or a second detection region located adjacent to and above the first detection region. This makes it possible to restrain contact between the work machine and an obstacle while restraining a reduction in a detection range due to exclusion of a structure of the work machine from an object of detection.

In a hydraulic excavator including a machine body and a front work device, when an object is detected by sensors for detecting an object around the machine body when operation limiting control for limiting the operation of at least one of the machine body and the front work device is enabled, or when an operation device is operated, the detection of the object is notified to an operator by a first state warning, and when the operation limiting control is enabled and when the operation device is not operated, the detection of the object is notified to the operator by a second state warning that is weaker in warning intensity than the first state warning. Accordingly, the botheration for the operator can be suppressed while securing the effectiveness of an alarm in periphery monitoring, and the safety performance can be enhanced.

Work machine and periphery monitoring system

A hydraulic excavator is provided which makes it possible to allow an operator to surely recognize an alarm that notifies the operator of non-wearing of a seatbelt even when a work is performed in a situation in which a moving object is present around the machine. A controller outputs, when a moving object is detected and wearing of a seatbelt is detected by a seatbelt detection device, a first alarm through a notification device, outputs, when the moving object is not detected and non-wearing of the seatbelt is detected by the seatbelt detection device, a second alarm through the notification device, and outputs, when the moving object is detected and non-wearing of the seatbelt is detected by the seatbelt detection device, the second alarm preferentially over the first alarm through the notification device.

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Kasumigaura, Japan

Keiichirou Anahara