Patent ID: 7992474

Claim:
A cover structure for covering a spindle and a tool holder of a machine tool, the machine tool having a pedestal on which the spindle and the tool holder are arranged such that the spindle and the tool holder may be moved relative to each other, the machine tool being configured to sequentially machine a plurality of parts each having a designed shape, by applying a tool, rotatably held by the tool holder or fixed to the tool holder in a predetermined direction, to a workpiece held by the spindle, wherein the cover structure comprises: a recessed portion formed in a part of the cover structure or near the boundary between the pedestal and the cover structure; an opening portion communicated with the recessed portion, for ejecting a machined part having a designed shape and separated from the spindle outside of the cover structure; and a channel positioned in the recessed portion of the cover structure and extending parallel to the axial direction of the spindle.