To protect a hydraulic hose connecting a revolving superstructure to an actuator of a work device.
A hose insertion hole 19 is formed in the corner where the left face plate 15 and the rear face plate 14 of a swing post 13 cross each other and hydraulic hoses 32 connecting the revolving frame 5 side control valve device 31 and the work device 4 side actuator are inserted in a hose housing space 18 of the swing post 13 and extended to the work device 4 along the rear face plate 14. In this way, the middle part of the hydraulic hoses 32 can be contained in the housing space 18 of the swing post 13 and protected from earth and sand during excavation work. On swinging motion of the swing post 13, the hoses 32 are prevented from contacting with the corner between the left face plate 15 and the rear face plate 14. Hence, durability of the hoses can be improved.
YAMADA KAZUNORI
ISHIKAWA NAOHIRO
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