| 摘要 |
<P>PROBLEM TO BE SOLVED: To completely prevent intrusion of chips and the like into a guide part. <P>SOLUTION: A side wall 21 partitioning a machine tool inside and outside is provided on a top plate 52. A door 33 is supported slidably along an outer face of the side wall 21 to a moving body 34 guided by a guide part 53 provided under the top plate 52 along the side wall 21. An upper cover 41 at an upper level from the moving body 34 and a lower cover 43 at a lower level of the moving body are covered respectively under the top plate 52 in a sliding range of the moving body 34. A center cover 42 forming a shape of avoiding interference with the moving body 34 is covered in a clearance between the upper covers 41, 82 and the lower cover 43. Lower edges of the upper covers 41, 82 and an upper edge of the center cover 42, and a lower edge of the center cover 42 and an upper edge of the lower cover 43 are overlapped with each other by δ1, δ2, δ3, respectively when viewed from inside/outside direction. Outer faces of the upper covers 41, 82, an outer face of the center cover 42 and an outer face of the lower cover 43 are made to inwardly retreat stepwise in this order. <P>COPYRIGHT: (C)2013,JPO&INPIT |
