BOOM ARRANGEMENT FOR ROCK DRILLING RIG

摘要

The invention relates to an arrangement for mounting a cage to a lifting boom of a rock drilling rig comprising a carrier (1 ) to which the lifting boom (4; 5) is connected horizontally and vertically turnably, as well as actuators for turning the lifting boom (4; 5), whereby one end of the lifting boom (4; 5) is provided with a cage (6; 7) mounted with respect to the lifting boom (4; 5) turnably around a horizontal joint (11), as well as an actuator for turning the cage (6; 7) so that the cage (6; 7) remains in a substantially horizontal position irrespective of a vertical angle of the lifting boom (4; 5), as well as a vertical axle (13) and a turning device (15) for turning the cage in a transverse direction of the lifting boom (4; 5). In the arrangement, the cage (6; 7) is connected to the vertical axle (13) such that it is turnable to a side of the lifting boom (4; 5) from the vertical axle (13) towards the carrier (1 ) of the rock drilling rig.