Patent ID: 8567519

Claim:
Ground working device comprising a carrier implement, a mast that forms a mast sequence and has a lower mast part, which is linked to the carrier implement, an upper mast part and at least one mast extension piece, whereby for the purpose of increasing the mast length the mast extension piece can be inserted into the mast sequence between lower mast part and upper mast part, and whereby for the purpose of reducing the mast length the mast extension piece can be released from the upper mast part and the lower mast part and removed from the mast sequence, and, with the mast extension piece removed, the upper mast part can be fixed directly on the lower mast part, a work sledge which is guided in a displaceable manner along the mast, and at least one feed rope for displacing the work sledge, which runs at least in some areas longitudinally of the mast, wherein a reel for receiving slack rope is provided that develops on the feed rope when the mast extension piece is removed from the mast sequence and the upper mast part is fixed directly on the lower mast part.