To suppress any waving travel of a curve belt, and to prevent any lock phenomenon of the belt and breakage of a bead.
A curve belt 10 having division beads on its outer peripheral edge is stretched over end rollers 21, 22 and attached to a curve conveyor 20. The curve belt 10 traveling below the curve conveyor 20 is held by a driving roller 23 and nip bearings 24, 25, and the curve belt 10 is conveyed by the rotation of the driving roller 23. Division beads of the curve belt 10 traveling below the curve conveyor are held by guide bars 32, 33, and supported by supporting plates 34, 35 opposing the guide bars 32, 33. The inverse bend radius R of the curve belt 10 is set to be larger than 1/2 of the distance D from the position of holding the curve belt 10 to the supporting plate 34 on the outlet side by the nip bearing 24 and the driving roller 23 provided on the outlet side of the belt.
Hiroki Ogura
Tsuyoshi Nonaka
Shigeru Torayama
Tsubouchi Shin