METHOD AND DEVICE FOR SETTING THE DIRECTION AND/OR THE INCLINATION OF AN ELONGATED ROCK DRILLING APPARATUS

摘要

An elongated rock drilling apparatus is swingable by positioning power means. Set values of inclination and direction of the rack drilling apparatus are set by prepositioning a first pendulum device relative to the rock drilling apparatus. According to one aspect of the invention the actual values of the inclination and direction of the rock drilling apparatus in perpendicular directions are sensed by means of said first pendulum device. According to another aspect of the invention the actual values of the inclination and direction of the rock drilling apparatus are sensed by means of a second pendulum device. Means are provided for automatically bringing the rock drilling apparatus to a position in which set and actual values of inclination and direction coincide.