Patent ID: 8499922

Claim:
A chip discharging device of a machine tool comprising: a pair of left and right circular driving-side members that are rotationally driven; a pair of left and right driven-side members disposed in correspondence to the left and right driving-side members; a pair of left and right coupling members in an endless chain shape wound around the left and right driving-side members and the left and right driven-side members respectively; a plurality of scraping plates bridged between and fixed to the left and right coupling members at predetermined pitches; and a receiving plate on which lower ends of the scraping plates passing thereabove slide in a contact state and which receives chips and guides the chips to a discharge port, wherein the scraping plates slide on the receiving plate to move the chips on the receiving plate to the discharge port, and wherein the scraping plates include: a first scraping plate attached to the coupling members, with an end surface thereof facing the receiving plate being deviated from an attachment point where the first scraping plate is fixed to the coupling members, by a distance L 1 ; and a second scraping plate attached to the coupling members, with an end surface thereof facing the receiving plate being deviated from an attachment point where the second scraping plate is fixed to the coupling members, by a distance L 2 which is smaller than the distance L 1 of the first scraping plate.