Rise restricting device of Borutaheddo of the lock bolt hitting

摘要

PROBLEM TO BE SOLVED: To control the rising of a bolter head to prevent a truck from being inverted. ;SOLUTION: This rock bolt driving machine is equipped with a tilting mast mounting on a truck, a rock bolt driving bolter head capable of being raised and lowered by a lift motor 24 mounted on the mast and a mast support expanded to a slope side with a mast support cylinder 20 and bearing the inclined mast from the slope. In that case, a position sensor for detecting that the height of the bolter head is within the limits of stability and a pressure switch 44 for detecting a bearing state of the mast with the mast support are provided, and an electromagnetic selector valve 36 switched so as to rise beyond the limits of the bolter head only in a bearing state of the mast with the mast support based on detection signals of the position sensor and pressure switch 44 is provided to a pilot pipe line 28 of a lift motor control valve 26.;COPYRIGHT: (C)1998,JPO