| 摘要 |
<p>PURPOSE:To prevent turbulence of synchronization due to vibration by inserting a vibration absorber at least between a tooth portion on passive side of a toothed rotation transmitted and a rotary shaft in a drum type engraving scanner. CONSTITUTION:A rotary encoder is coupled to one end of a rotary shaft 2 of a recording drum, and the turning torque given from a motor through a speed reducer is transmitted by engagement of a toothed belt 50 and a toothed pulley 36. The toothed pulley 36 comprises a main body inner ring portion 71 fixed to the shaft 2 and a main body outer ring portion 73 having a tooth portion 74, which is disposed concentrically with a gap 72, wherein ring-shaped vibration absorbers 75, 76 are pressed in the vicinity of a boundary portion between both sides of both ring portions 71, 73 by fitting pressure inner rings 77, 78 to pressure outer rings 79, 80 by bolts 81 and coupled to each other to absorb vibration. In this arrangement, the turbulence of a designated processing for a rotated body itself or a processed body interlocking with the rotated body and rotation can be reduced.</p> |
