Patent ID: 8663077

Claim:
A block-transferring tool for use with a machine tool, the machine tool comprising a table and a main shaft that are relatively movable in three-dimensional directions, the tool comprising: a main shaft attachment attached to the main shaft; a block holder configured to hold the bottom block; and a separator provided between the main shaft attachment and the block holder; wherein: the block-transferring tool is configured to lift a bottom block; the bottom block comprises: a bottom wall disposed on the table, the bottom wall comprising a first end and a second end; a top wall disposed in parallel to and apart from the bottom wall, the top wall comprising a first end and a second end; a first side wall connecting the first end of the bottom wall and the first end of the top wall; and a second side wall connecting the second end of the bottom wall and the second end of the top wall; the bottom block being formed in a cross-sectionally rectangular frame comprising an internal space, and the block holder comprises: an extension piece extending in a longitudinally axial direction of the main shaft attachment; and an insert piece disposed on an end of the extension piece substantially orthogonally to the extension piece, the insert piece being configured to be inserted into the internal space of the bottom block.