Patent ID: 7735248

Claim:
A piping structure of a front work machine, wherein said piping structure of said front work machine is mounted on a main machine through turnably-supporting parts on both right and left sides of a bonnet provided in a front portion of the main machine, or a turnably-supporting part on one side thereof, said piping structuring comprising: a bucket provided in a front end portion thereof, a lift arm movably supported by said turnably-supporting part, a lift cylinder movably supported by said turnably-supporting part, and arranged on one vertical side of said lift arm to move up and down the lift arm with respect to said turnably-supporting part, a bucket cylinder movably supported by said turnably-supporting part, and arranged on another vertical side of said lift arm to turn said bucket with respect to said lift arm, and a hole part through which hydraulic piping passes from one side of said lift arm to another side of said lift arm, where said hole part is provided in a portion of said lift arm within a region above said lift cylinder and below said bucket cylinder so as to be disposed between said lift cylinder and said bucket cylinder.