| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure for reducing the size and cost of a machining device A. <P>SOLUTION: A main shaft 12 is supported and fixed to the inside of a cylindrical supporting member 30. The supporting member 30 is supported on a moving member 23x by a bearing 33 to be displaced in a z-axis direction. In addition, an external surface of the supporting member 30 is in contact with a plurality of rollers 51 of the bearing 33 as a guide face 30a. When a feed screw 22z of a z-axis driving part 20z turns, the supporting member 30 moves in the z-axis direction together with a nut 31. The supporting member 30 comes in contact with the plurality of rollers 51 of the bearing 33 having the guide face 30a fixed to the moving member 23x, the plurality of rollers 51 are driven to rotate, and move smoothly while guided in the z-axis direction. Thus, the machining device A can be reduced in size and cost by reducing the number of components of a supporting structure of the main shaft 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
