| 摘要 |
PURPOSE:To freely form a stepping press face corresponding to the face to be ground of a work piece in the stepping press device of a wide belt sander CONSTITUTION:In a stepping press device arranged inside a work piece through an endless sanding belt 14, a ventilating member 23 is mounted in a ventilating groove 21 opened in the feed direction, an air feed duct 22a to feed pressure air to the ventilating member 23 and an air exhausting duct 22b to exhaust the air are provided over it, stepping press force is applied on the ventilating member 23 by feeding the pressure air, and the stepping press face corresponding to the face to be ground of the work piece is formed. |
