| 摘要 |
PURPOSE:To disperse load applied on respective sprockets and reduce load applied on links by providing intermediate driving device, and making small an opening size between a guide groove and a link in the relax section. CONSTITUTION:Intermediate driving devices 10, 11 function to pull links 12-15 following to a drawing part B and push in links 12-15 up to the vicinity of outlet of a relax section D. An opening size between a guide groove and links 2 is made small in the section in which the links 12-15 are pushed in with the intermediate driving devices 10, 11, namely, up to the outlet of film relax. Hereby, play of the links 12-15 is made small, transmitted pushing force of the links 12-15 due to the intermediate driving devices 10, 11 is effectively transmitted to links on the outlet side. As a result of this, load applied on the sprocket 9 on the outlet side, followingly, load applied on the links 12-15 is reduced. Namely, the whole load needed to drive the links 12-15 is dispersed to respective driving devices, and hence load applied on the links 12-15 can be reduced. |
