Hitachi Construction Machinery Co., Ltd.

Ryu Narikawa

Hidekazu Moriki

Hiroshi Sakamoto

Shiho Izumi

Yasutaka Tsuruga

Manabu Edamura

Shuuichi Meguriya

Hiroki Takeuchi

Shinya Imura

Hidefumi Ishimoto

Shinji Ishihara

Teppei Saitoh

Teruki Igarashi

Kouji Fujita

Kouji Shiwaku

Shinjirou Yamamoto

Hideaki Itou

Tadashi Nishizawa

Kouji Ishikawa

Hiroaki Sato

Hiroaki Tanaka

Tadashi Osaka

Masaki Kanai

Akira Kanazawa

An automated operation controllerof an automated work systemincludes: a work status management sectionthat selects a work content according to a work DBthat records a work plan for a hydraulic excavatorand a work order in the work plan, creates an operation plan based on the selected work content and information on the surrounding environment measured by laser scanners, and outputs a control signal to a vehicle body controllerbased on the operation plan; and an abnormal object detection sectionthat detects an abnormal object present on a work site based on the information on the surrounding environment measured by the laser scanners. When the execution of the operation plan is determined to be hindered by the presence of the abnormal object, the work status management sectionselects another work content from the work plan.

Automated work system

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.

Work machine control system

Provided is a work machine that allows assisting a loading work without giving uncomfortable feeling to an operator. The control deviceof the work machineincludes an allowable range calculation sectionthat calculates an allowable range indicating a range in which the front work deviceis movable in a height direction allowed in a swing operation; an operation determining sectionthat determines whether the work machineis under a convey operation; and an operation control sectionthat controls a turn operation of a boomsuch that the position of the front work devicein the height direction remains within the allowable range when the work machineis determined to be under the convey operation.

Work machine

A work machine includes a second pilot line that introduces a hydraulic fluid from a pilot hydraulic fluid source to a pilot valve bypassing a first gate lock valve, a second gate lock valve that is disposed on the second pilot line and that is configured to be switched to an open position for allowing the supply of the hydraulic fluid to the pilot valve or a closed position for interrupting the supply of the hydraulic fluid, and a controller that controls the second gate lock valve on the basis of a second remote operation signal transmitted from a remote operation apparatus and that controls the pilot valve according to a first remote operation signal transmitted from the remote operation apparatus. In a state where the first gate lock valve is at a closed position, the second gate lock valve is allowed to be controlled by the controller when stairs are in a retracted state, and is kept at the closed position irrespective of the second remote operation signal when the stairs are in an extended state.

In a case that a change instruction to instruct to change a work area Ato a requested work area Ais input, whether or not change of the work area Ato the requested work area Ais possible is judged on the basis of the work area A, location information of a machine main body configured by an upper swing structureand a lower track structure, and posture information of a work device, and the work area Ais overwritten with the requested work area Ato change the work area in an only case that it is judged that change is possible. This can suppress interference between plural work machines.

An articulated-type front work implement has a boom, an arm, and a bucket that are driven members coupled to each other; a boom cylinder, an arm cylinder and a bucket cylinder that are hydraulic actuators each of which drives a corresponding one of the plurality of driven members on the basis of an operation signal; a plurality of operation members each outputting the operation signal to one of the hydraulic actuators; and a controller that outputs the operation signal to at least one of the plurality of hydraulic actuators or executes area limiting control of correcting the output operation signal such that the front work implement moves on a target surface preset for a work target of the front work implement or within an area above the target surface, and corrects the operation signal on the basis of information related to operation of the hydraulic actuator.

A work machine includes a plurality of actuators that drive a work device; a posture sensor that senses postural data about the work device; and a controller having a degree-of-proximity calculating section that computes a degree of proximity that is an index value indicating proximity between an intrusion prohibition region and the work device on the basis of positional data about the intrusion prohibition region and the postural data. A command section executes, when the proximity specified by the degree of proximity is closer than proximity specified by a degree-of-proximity threshold, operating area limiting control to decelerate at least one of the plurality of actuators such that an intrusion of the work device into the intrusion prohibition region is prevented. History of the data about the degree of proximity calculated at the degree-of-proximity calculating section is stored and the degree-of-proximity threshold is altered on the basis of the history data.

A construction machine that can make a depressing force of a bucket during compaction work to be uniform without requiring an operator to perform a complicated operation is provided. A controllerdetermines whether or not compaction work is in progress, calculates a front distance R that represents a distance between a rotational pivot of a boomand a predetermined position B in a back surface of a bucket, determines a target velocity of the bucket such that a velocity with which the bucket approaches a leveling target surface decreases with increasing values of the front distance, and, during the compaction work, notifies the operator of details of an operation of operation devicesandfor achieving the target velocity of the bucket or controls hydraulic actuatorstoso as to achieve the target velocity of the bucket.

Construction machine

A hydraulic excavator including a controller that calculates the positional relationship between a bucket and a target surface and a display device that displays the positional relationship between the bucket and the target surface includes an actuator state sensor that detects the pressure of a hydraulic cylinder. The controller calculates the velocity of the bucket based on the position of a work implement and the operation amount of an operation device and changes the contents of informing by the display device according to the velocity of the bucket, the distance between the bucket and the target surface, and the pressure of the hydraulic cylinder. The display device displays the contents of informing changed by the controller.

Provided is a work machine that can operate a front work implement at a speed according to an operator's lever operation while securing the accuracy of work by machine control. A hydraulic excavatorincludes a controllerthat sets a target surface for a bucketand controls the operation of a front work implementB in such a manner that the bucket does not penetrate to below the target surface. The controller sets a speed correction region on an upper side of the target surface, varies a width R of the speed correction region in accordance with an operation amount of an operation deviceA orC, and controls the operation of the front work implement in such a manner that the work tool does not penetrate into the speed correction region.

A hydraulic excavator includes a controller () that executes region limiting control to forcibly raise a boom () in such a manner that a position of a tip end of a bucket () is kept on a target excavation surface and within a region above the target excavation surface if an operation device () issues an action direction to an arm () or the bucket. The controller determines which is selected as a control mode over a raising speed of the boom at a time of executing region limiting control, a first mode or a second mode specified by a raising speed lower than a raising speed of the first mode if the tip end of the bucket is located below the target excavation surface, and controls the raising speed of the boom based on a result of determination.

Hydraulic excavator

A controller outputs a first velocity (first limiting velocity) as a limiting velocity for a boom cylinder when a boom lowering operation amount is smaller than a first operation amount, and outputs a second velocity when the boom lowering operation amount is equal to or larger than the first operation amount. The first velocity is set to decrease according to a decrease in a target surface distance. The second velocity is defined by a weighted average of the first velocity and a third velocity (second limiting velocity) set to change according to one of the target surface distance and the boom lowering operation amount of the operation device, and is set such that an increase in the boom lowering operation amount reduces a weight for the first velocity while increasing a weight for the third velocity.

A work machine () includes a controller () having a notification control section () that exercises control as to whether to notify an operator of operation support information in accordance with a distance between a predetermined target surface, out of a plurality of discretionally set target surfaces, and a work implement (A), the work machine including a current terrain profile acquisition device () that acquires a position of a current terrain profile, the controller including a target surface comparison section () that compares the position of the current terrain profile () with a position of the predetermined target surface () to determine a vertical position relationship between the current terrain profile and the predetermined target surface. The notification control section () changes content of the operation support information in accordance with a result of determination by the target surface comparison section.

Provided is a hydraulic excavator () that performs work by operating an arm () after moving a bucket () to a work start position. An operation determination section () determines, based on an operation performed on an operation device, whether a front work device (A) is engaged in a work preparation operation for moving the bucket to the work start position. When the operation determination section determines that the front work device is engaged in the work preparation operation at the time of operation of the operation device, an actuator control section () controls a bucket cylinder () such that the angle of a work tool with respect to a target surface coincides with a preset target angle (&#x3b8;TGT).

The control system for the hydraulic construction machine includes: a hydraulic actuator; a work device driven by the hydraulic actuator; a hydraulic pump supplying a hydraulic fluid to the hydraulic actuator; a pump flow rate control section controlling the delivery flow rate of the hydraulic pump; a pump horsepower control section controlling the horsepower of the hydraulic pump; and a target surface distance acquiring section measuring or computing a target surface distance that is the distance between a construction target surface on which the work device works and the work device. The pump flow rate control section is configured to perform control such that as the target surface distance decreases, the delivery flow rate decreases, and the pump horsepower control section is configured to perform control such that as the target surface distance decreases, the horsepower of the hydraulic pump increases.

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Tokyo, Japan

Ryu Narikawa