Device and method for reaming a flight gap of a drill flight

A device for reaming a flight gap of a drill flight of a drilling tool, comprising - a base carriage displaceably mounted along a mast of a drilling apparatus, the base carriage being attached to a drill drive carriage by coupling the base carriage to the drill drive carriage with at least one chain,

• a reaming element which is configured to engage in the flight gap of the drilling tool, wherein soil material adhering to the drilling tool can be scraped off by the reaming element when the drilling tool is rotated, and
• a support arm on which the reaming element is held, and which is mounted movably relative to the base carriage between a retracted position, in which the reaming element is spaced apart from the drilling tool, and a reaming position, in which the reaming element engages in the flight gap for reaming soil material,
• wherein
• the support arm is pivotally mounted between the retracted position and the reaming position about a pivot axle which is oriented substantially parallel to a drilling longitudinal axis of the drilling tool,
• the support arm is additionally mounted on the base carriage in a direction parallel to the drilling longitudinal axis of the drilling tool, so as to be deflectable from a basic position, and
• the support arm is held in the basic position with a biasing force by means of at least one bias device.