| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutter bit device in which the projection quantity of a bit is easy to be determined by adopting a cam profile in which touque does not work to a cam shaft and the bit can be fixed surely at a specified place. SOLUTION: An extrusion means extruding preceding bits 6 has a cam 31 abutted against base end faces of the bits 6 and the cam shaft 16 rotating the cam 31. The cam 31 has a plurality of stages of cam faces gradually increasing extrusion quantities of the bits extruded at every fixed rotational angle. COPYRIGHT: (C)2004,JPO&NCIPI |
