Patent ID: 7685915

Claim:
A cutting auxiliary device used to correct a shift of a cutting line when the cutting line is shifted from a straight line in a band saw for cutting a work by using a flexible steel band, the cutting auxiliary device comprising: a band saw body, a working board mounted on said band saw body, said working board having a board face for supporting the work during cutting and an edge port plate for passing the flexible steel band through the board face, said working board being fixed in position; a working board support portion being horizontally rotated with respect to the working board using the flexible steel band as a center; a laser projector attached to the band saw body and projecting a laser beam, said laser beam being movable from a first position where the laser beam is initially overlapped with the cutting line when the work is straightly cut by the flexible steel band on the working board and said laser beam being movable to a second position where the laser beam is at a correct positioning of the cutting line at an angle with respect to the flexible steel band when the cutting line is subsequently shifted from the straight line of the first position of the laser beam due to a drift between the band saw and the work; and a working board fixing portion for fixing the working board support portion in place with respect to a receiving portion of the working board in a place where the straight line of the laser beam projected from the laser projector and a mark on the working board are aligned after the work has been rotated by the working board support portion.