Work machine

Abstract

A work machine includes a lower travel body, an upper slewing body mounted on the lower travel body in a slewable manner, a work attachment including a boom attached to the upper slewing body in a raisable and lowerable manner, a hydraulic actuator attached to the work attachment, and a manual adjusting valve provided in piping extending from the upper slewing body to the hydraulic actuator. The manual adjusting valve is attached to the boom.

What is claimed is: 
     
         1 . A work machine, comprising:
 a lower travel body;   an upper slewing body mounted on the lower travel body in a slewable manner;   a work attachment including a boom attached to the upper slewing body in a raisable and lowerable manner;   a hydraulic actuator attached to the work attachment; and   a manual adjusting valve provided in piping extending from the upper slewing body to the hydraulic actuator, wherein   the manual adjusting valve is attached to the boom.   
     
     
         2 . The work machine according to  claim 1 , wherein
 the manual adjusting valve is attached to a side surface or a back surface of the boom.   
     
     
         3 . The work machine according to  claim 2 , wherein
 the manual adjusting valve is attached above a work floor provided on the upper slewing body in a state where the boom is erected.   
     
     
         4 . The work machine according to  claim 3 , wherein
 the manual adjusting valve is attached at a height at which a worker who works standing on the work floor can access the manual adjusting valve in a standing position of the worker in a state where the boom is erected.   
     
     
         5 . The work machine of  claim 4 , wherein
 a protective fence is provided at a position adjacent to the boom on the work floor, and   the manual adjusting valve is attached at a position higher than the protective fence in a state where the boom is erected.   
     
     
         6 . The work machine according to  claim 2 , further comprising
 dual slewing-purpose hydraulic motors mounted on the upper slewing body, wherein   the manual adjusting valve is attached to the back surface of the boom, and   the piping includes a plurality of back surface-side flexible tubes arranged vertically between side surfaces of the boom in a width direction and on respective sides of the dual slewing-purpose hydraulic motors and extending to a back surface side of the boom.   
     
     
         7 . The work machine according to  claim 6 , wherein
 the piping includes a plurality of front surface-side flexible tubes extending between the side surfaces of the boom in the width direction to a front surface side of the boom, the front surface side being opposite to the back surface side.