Device and method in respect of a rock drill rig, drill string component, handling device and rock drill rig

A handling device for handling drill string components in a rock drill rig, the handling device comprising:

• a linear guide,
• a slide,
• a chain transmission configured to displace the slide,
• a gripping device for drill string components being positioned on the slide, and
• a tensioning device comprising
• a tensioning head arranged on the slide and being displaceable in relation to the slide in a tension direction of the drive chain,
• a first fastening member for fastening a first end of the drive chain on the slide,
• a second fastening member for fastening a second end of the drive chain on the tensioning head,
• a spring device arranged between the tensioning head and the slide for spring loading the tensioning head in the tension direction,
• a tension adjuster included with at least one of said first and second fastening members, wherein the tension adjuster is for adjusting tension in the drive chain, and
• a slide guide provided on the slide and on which the tensioning head moves in relation to the slide, wherein the slide guide is oriented in said tension direction, and wherein the slide guide includes two parallel slide rods which pass through bushings being received in the tensioning head.

A rock drill rig, comprising:

• a linear guide comprising a feed beam
• a slide,
• a chain transmission configured to displace the slide,
• a rock drilling machine positioned on the slide, and
• a tensioning device comprising
• a tensioning head arranged on the slide and being displaceable in relation to the slide in a tension direction of the drive chain,
• a first fastening member for fastening a first end of the drive chain on the slide,
• a second fastening member for fastening a second end of the drive chain on the tensioning head,
• a spring device arranged between the tensioning head and the slide for spring loading the tensioning head in the tension direction,
• a tension adjuster included with at least one of said first and second fastening members, wherein the tension adjuster is for adjusting tension in the drive chain, and
• a slide guide provided on the slide and on which the tensioning head moves in relation to the slide, wherein the slide guide is oriented in said tension direction, and wherein the slide guide includes two parallel slide rods which pass through bushings being received in the tensioning head.