| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve compact design of dimensions of a take-up unit.SOLUTION: The take-up unit comprises: a shaft support 11 which supports a rotary shaft 42 of a sprocket 41; a guide frame 12 which guides the shaft support 11 along a length direction; and a screw shaft 13 which is screwed into a screw hole 16 formed in the shaft support 11, and fitted along a length direction of the guide frame 12. The guide frame 12 is comprised of: a bottom plate part 19; a pair of side plate parts 20 which rise in the same direction from both width-direction sides of the bottom plate part 19; and width-direction inward flanges 21 formed at the tips of the respective side plate parts 20. The shaft support 11 is guided in the guide frame 12 so as to be movable in the length direction while being engaged with the flanges 21. The screw hole 16 of the shaft support 11 is formed only on one width-direction side of the guide frame 12 with respect to the rotary shaft 42. The screw shaft 13 is rotatably supported in the guide frame 12 using the support pieces 14 fixed to both length-direction sides of the guide frame 12.</p> |
