| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate the position alignment of a draft roller unit. <P>SOLUTION: Draft roller units 30a and 30b comprising a support member, two bottom rollers supported by the support member and two motor units 52 are disposed on an inclined surface 41a which is tilted at an angle of approximately 60° to a horizontal plane of a frame 40. The frame 40 comprises a balancing mechanism 43 comprising a rotation member 46 and a twisted spring. The rotation member 46 is rotatably supported by a shaft 42a extending outwardly from the both horizontal ends of leg parts 42 in the horizontal direction. The twisted spring energizes the rotation member 46. The draft roller units 30a and 30b are energized at a contact part 64 disposed at the support member upwardly along the tilted surface 41a, i.e. a direction opposite to the direction of movement due to their own weights, by the balancing mechanism 43 so as not to slide downwardly along the tilted surface 41a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
