ROCK-DRILLING UNIT, DRILL BIT CHANGER, AND METHOD FOR CHANGING DRILL BIT

摘要

The invention relates to a rock-drilling unit, drill bit changer, and method for changing a drill bit.The front part of a feed beam (5) has a retainer (14) and a drill bit changer (15) connected thereto.In changing drill bits (14), a normal retainer fastened to the feed beam is utilised, when the connection between the drill bit and drill rod (11) is opened.The changer also comprises a maga- zine (16) for storing drill bits and a transfer device (18) for transferring the drill bits between the retainer and magazine.