| 摘要 |
A folding mechanism for a printing press comprising a frame of the printing press, a folding cylinder rotatably mounted on said frame, an eccentric member fixedly secured to said frame, said eccentric member having first and second holes formed therein, a sun gear shaft inserted in the first hole of said eccentric member and fixedly secured thereto, said sun gear shaft having a sun gear formed at one end thereof, a gear box rotatably mounted on said sun gear shaft, and a drive shaft rotatably mounted on said frame at one end thereof, the other end of said drive shaft being fixedly secured to said gear box and adapted to rotate together. The improved folding mechanism further comprising a pair of idler gears rotatably mounted in said gear box adapted in mesh with said sun gear, a pair of folding blade shafts rotatably mounted on said gear box, each of said folding blade shafts having a plurality of folding blades and a driving gear mounted thereon, said driving gears being adapted to mesh with said idler gears and one of said driving gears being adapted to move in axial direction out of engagement of said idler gear, a manually-operated mechanism for interrupting the drive to one of said folding blade shafts for silencing the folding blades associated therewith, and a segment gear fixedly mounted on said gear box for locking said one of folding blade shafts against rotation when said one of driving gears is moved in axial direction out of engagement of one of said idler gears to engage with said segment gear.
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