Excavator

Abstract

An excavator includes a lower traveling body; an upper turning body mounted on the lower traveling body in a turnable manner; and a control device configured to perform facing control such that the upper turning body faces a target work surface, by applying a turning force to the lower traveling body or the upper turning body to turn the lower traveling body or the upper turning body. The control device controls a turning speed of the lower traveling body or the upper turning body based on a turning angle required for the upper turning body to face the target work surface.

What is claimed is: 
     
         1 . An excavator comprising:
 a lower traveling body;   an upper turning body mounted on the lower traveling body in a turnable manner; and   a control device configured to perform facing control such that the upper turning body faces a target work surface, by applying a turning force to the lower traveling body or the upper turning body to turn the lower traveling body or the upper turning body, wherein   the control device controls a turning speed of the lower traveling body or the upper turning body based on a turning angle required for the upper turning body to face the target work surface.   
     
     
         2 . The excavator according to  claim 1 , wherein the control device limits the turning speed when the turning speed of the lower traveling body or the upper turning body exceeds a predetermined speed. 
     
     
         3 . The excavator according to  claim 2 , wherein the predetermined speed is obtained based on the turning angle required for the upper turning body to face the target work surface. 
     
     
         4 . The excavator according to  claim 2 , wherein the control device applies, to the lower traveling body or the upper turning body to which the turning force is being applied, a turning force opposite to the turning force currently being applied to the lower traveling body or the upper turning body, when a difference between the turning speed of the lower traveling body or the upper turning body when starting the facing control and the predetermined speed, is greater than a predetermined value. 
     
     
         5 . The excavator according to  claim 1 , wherein the control device provides a report to an operator of the excavator, when the upper turning body is likely to exceed a position facing the target work surface when the lower traveling body or the upper turning body turns. 
     
     
         6 . The excavator according to  claim 1 , wherein the control device provides a report to an operator of the excavator, when the upper turning body exceeds a position facing the target work surface when the lower traveling body or the upper turning body turns. 
     
     
         7 . The excavator according to  claim 1 , wherein the control device
 provides a first report to an operator of the excavator, when the upper turning body is likely to exceed a position facing the target work surface when the lower traveling body or the upper turning body turns, and   provides a second report that is in a mode different from the first report to the operator of the excavator, when the upper turning body exceeds a position facing the target work surface when the lower traveling body or the upper turning body turns.   
     
     
         8 . The excavator according to  claim 1 , wherein the control device turns the lower traveling body or the upper turning body in an opposite direction until the upper turning body faces the target work surface, when the upper turning body exceeds a position facing the target work surface when the lower traveling body or the upper turning body turns. 
     
     
         9 . The excavator according to  claim 1 , wherein the control device performs the facing control when an operation for turning the lower traveling body or the upper turning body is performed while a predetermined switch is operated, in conjunction with the target work surface being located below an operating element of the excavator for working on the target work surface. 
     
     
         10 . An excavator comprising:
 a lower traveling body;   an upper turning body mounted on the lower traveling body in a turnable manner; and   a control device configured to perform facing control such that the upper turning body faces a target work surface, by applying a turning force to the lower traveling body or the upper turning body to turn the lower traveling body or the upper turning body, wherein   the control device provides a report when the upper turning body is likely to exceed a position facing the target work surface when the lower traveling body or the upper turning body turns.