| 摘要 |
PROBLEM TO BE SOLVED: To achieve simplification of a configuration of a scrap discharge device 43 and miniaturization of the scrap discharge device 43, while sufficiently increasing efficiency of collection of dust by a dust collector 49.SOLUTION: An opening/closing shutter 53 for opening/closing an opening 51 of a dust collection duct 45 is provided on the Y-axis direction one-end side of the dust collection duct 45. A reciprocation unit 63 is configured to impart Y-axis direction one-end side sliding relative to a scrap conveyance member 61 to scrap S only during the reciprocation of the scrap conveyance member 61. |
