| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent detachment of a roller shaft in the axial direction by engaging an engagement piece of a holding body with an engagement groove in the vicinity of one end of the roller shaft. SOLUTION: A rotary shaft 16 on which a driven roller 15 for carriage is provided, an engagement groove 37 is provided on a circumferential surface in the vicinity of one end of the rotary shaft 16, an insertion hole 34 in which the other end of the rotary shaft 16 is inserted and movably held is provided in a side wall 35 of a frame 17, and an engagement piece having an engagement claw 40a to be engaged with the engagement groove 37 in the vicinity of one end of the rotary shaft 16 is provided on a stopper 38 to prevent detachment of the rotary shaft 16 in the axial direction.</p> |
