EXCAVATION REGION SETTING APPARATUS FOR CONTROLLING REGION LIMITED EXCAVATION BY CONSTRUCTION MACHINE

摘要

Disclosed is an excavation area setting system for area limiting excavation control in construction machines, the excavation control being performed to calculate a target speed vector Vc for control of a front device 1A on the basis of a body 1B, modify the target speed vector to limit a moving speed of the front device in the direction toward a boundary of a preset excavation area when the front device comes close to the boundary of the excavation area, and move the front device along the boundary of the excavation area. To set the excavation area, an external reference 80 is installed horizontally outside a hydraulic excavator itself, and a depth hr from the external reference to the boundary of the excavation area is set by using a setting device 7. Upon an external reference setting switch 71 being depressed when the front device is moved and the front reference 70 is aligned with the external reference 80, a control unit 9 calculates a height hf from a body reference point O to the external reference, then calculates a depth hs of the boundary of the excavation area relative to the body reference point O based on the depth hr by using the height hf as a modification value, and sets the excavation area from the calculated depth hs on the basis of the body 1B as with the calculation of the target speed vector Vc. Thus, the excavation area can be set in a manner matched with the excavation control in which calculation is executed on the basis of the body, and highly reliable area limiting excavation control can be achieved. <IMAGE>