ROCK DRILLING DEVICE

摘要

A device for a rock drilling machine (1) for drilling of boreholes (2) in rock, where the rock drilling machine (1) comprises a drilling portion (4) and a string portion (6) which by means of joinable pipes (20) are connected to a support device on the outside of the borehole (2), and where the string portion (6) is provided with an anchor (8) comprising at least one against the borehole (2) preloadable and relative to the string portion (6) axially displaceable support shoe (30).