Abstract: The invention relates to an arrangement for employing a drill steel centralizer travelling on a feed beam of a rock drill machine. The drill steel centralizer has a pressure fluid-operated actuator for closing a transfer opening intended for a drill rod during drilling, whereby pressure fluid is fed into the actuator during drilling.

Abstract: A method and a rod magazine for handling elongated rods in a rock drilling unit, and a bolting unit. Elongated rods, such as drill rods and rock bolts, are stored into a linear rod magazine—provided with feed members for transferring the rods upward and downward in the magazine. The feed members comprise screw surfaces by which the rods are supported in the magazine. The required feeding movement is produced by rotating the feed members about their rotation axis. In addition, the rod magazine comprises transfer means that allow the rods to be transferred from the magazine to a drilling line or bolting line, i.e. to a centre, and vice versa. The transfer means are provided with gripping means for gripping the rods.

Abstract: The invention relates to a rock drill apparatus comprising a feed beam (1) and a rock drill machine moving to-and-fro therealong, a pressure fluid driven feed cylinder (4) which, by means of a flexible transfer element, is connected so as to transfer the rock drill machine in the longitudinal direction of the cylinder, the feed beam (1) being provided with a space in its longitudinal direction wherein the feed cylinder (4) is installed. The rock drill apparatus comprises a measuring device comprising a measuring wheel (7a) for a measuring line (9), the measuring wheel (7a) being connected to rotate a measuring sensor of the measuring device.

Abstract: The invention relates to an arrangement for employing a drill steel centralizer (6) travelling on a feed beam (1) of a rock drill machine (2). The drill steel centralizer (6) has a pressure fluid-operated actuator for closing a transfer opening intended for a drill rod (4) during drilling, whereby pressure fluid is fed into the actuator during drilling.

Abstract: A telescopic feed beam for a rock drill includes a lower beam and an upper beam arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam is such that there is a groove-like open space at the bottom of the lower beam and a transfer cylinder between the lower beam and the upper beam is mounted in the groove.

Abstract: A method for casing drilling, a drilling unit and an adapter device. The adapter device to be used in extension drill equipment drilling comprises an inner piece which can be rotated by the rotation device of the rock drilling machine. Around the inner piece, there is an outer piece which can be moved in the axial direction with respect to the inner piece. By changing the axial position of the outer piece, it can be selected whether the rotation force is directed from the rotation device to the inner rod or to the outer tube used in casing drilling during threading.

Abstract: A method for casing drilling, a drilling unit and an adapter device. The adapter device to be used in extension drill equipment drilling comprises an inner piece which can be rotated by the rotation device of the rock drilling machine. Around the inner piece, there is an outer piece which can be moved in the axial direction with respect to the inner piece. By changing the axial position of the outer piece, it can be selected whether the rotation force is directed from the rotation device to the inner rod or to the outer tube used in casing drilling during threading.

Abstract: A telescopic feed beam for a rock drill, comprising a lower beam (1) and an upper beam (2) arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam (1) is such that there is a groove-like open space (1b) at the bottom of the lower beam and a transfer cylinder (5) between the lower beam (1) and the upper beam (2) is mounted in the groove.

Abstract: A boom arrangement for a rock drilling apparatus includes at least one boom and an actuator, e.g., a passenger cage, arranged at a free end of the boom. The boom also includes at least two boom parts articulated pivotably with respect to each other. The first boom part is articulated by a first articulation pivotable substantially in a horizontal direction. The second boom part in turn is arranged at an end of the first boom part, and the second boom part can be turned both vertically and horizontally with respect to the first boom part.

Abstract: An arrangement for controlling the oscillation of a rock drilling equipment, comprising oscillation cylinders acting between a body and two crawlers, an oscillation selector valve allowing the oscillation cylinders to be interconnected. Locking valves are mounted in the oscillation cylinders, which valves prevent the flow of pressure fluid from the oscillation cylinders e.g., in the case of a hose damage, thus locking the crawlers and the body against movement relative to each other.

Abstract: Equipment for handling drill rods, comprising a slot-like storage space for storing drill rods side by side, a gripping jaw for gripping the drill rod, and a linearly movable displacing arm for displacing the drill rod from the outlet opening of the storage space by a linear movement to the drilling center of the drilling equipment and back. The equipment comprises a closing device positioned in the outlet opening of the storage space and movable in a direction transverse to the direction of movement of the displacing arm. The closing device has two inclined support surfaces facing away from the storage space, and the displacing arm similarly has an outwardly inclined guide surface at its end close to the storage space. On picking up a drill rod from the storage space, the gripping jaw presses the closing device at its support surface inwards so that the drill rod to be picked up is able to push the closing device inwards when the displacing arm is moved.

Abstract: A method of and an arrangement for controlling rock drilling when a feeding beam (3) is displaced so that the forward end thereof makes contact with a rock surface to be drilled. The arrangement comprises a displacing device for displacing the feeding beam in the longitudinal direction thereof and a control device for controlling the operation of the displacing device. The control means comprise a control element which is mounted at the forward end of the feeding beam (3) so that when the feeding beam is displaced in the longitudinal direction, the control element is the first to make contact with the rock surface. The control element is connected to stop the operation of the displacing device of the feeding beam (3) when it hits the rock surface.