| 摘要 |
<p>PURPOSE:To provide a dust collector without installing a shutter electrically controlled with a solenoid, etc., and which can surely attracts and collects the dust with a dust collecting machine having a comparatively weak attracting force. CONSTITUTION:Between a main duct 39 and a dust collecting opening part of a dust collecting duct installed corresponding to each dividing machining area (e), shutters 48 to open or close both communicating states are supported freely swingably between an opening position Q2 and a closing position Q1. A spring 50 to always keep this shutter 48 at the closing position Q1 is installed, an engaging and releasing member 51 is integrally installed on the shutter 48, and at a torch supporting frame 17, a cam surface 55 which engages to the engaging and releasing member 51 by the forward and backward movement of the torch supporting frame 17 and swings the shutter 48 corresponding to the dust collecting opening part (e) corresponding to the forward and backward direction position of the torch frame 17 until the opening position Q2 is formed.</p> |
