De-coupling device for sheet reversing mechanism

Abstract

The present invention aims at providing fully automated de-coupling device with smooth switching operation and durability. Basing upon mounting ring 16, regulating gear 20 is disposed in parallel with fixed gear 18 to shaft 10 of reversing cylinder. Pressure lever 32 tightens the regulating gear 20 to the reversing cylinder by lever principle. One end of the pressure lever 32 is urged by plate spring 28 at the center of the shaft 10 and, by temporally breaking off thrust of plate spring 28, the regulating gear 20 is released. Shifting member 34 for temporally breaking off thrust against the plate spring 28 has a pair of screw bolt 36 and nut 44 and is co-axially positioned with the shaft 10. One end of screw bolt 36 is regularly engaged with power source 48 and the other end can be pressed onto the pressure lever 32 in opposition to plate spring 28. The screw nut 44 is pivotally attached via radial bearing 54 to flange member 22 which is fixed to the end of the shaft 10. Stay 58 protruded from press body prohibits movement of the screw nut 44 in relation to the press body. Flange portion 52 of screw nut 44 abuts against the flange member 22 via thrust bearing 56.

1 . In a de-coupling device for sheet reversing mechanism in which regulating gear  20  is mounted on shaft  10  of reversing cylinder in parallel with fixed gear  18 , one end of pressure lever  32  which extends in radial direction being urged by plate spring  28  at the center of the shaft  10 , the regulating gear  20  being released temporally by breaking off thrust of the plate spring  28 , 
 wherein an improvement comprising;    shifting member  34  composed by a pair of screw bolt  36  and nut  44  which are co-axially disposed in relation to the shaft  10 ,    one end of the screw bolt  36  being regularly engaged with power source  48 ,    other end being able to be pressed to tip end of pressure lever  32  in opposition to plate spring  28 ,    the screw nut  44  being pivotally attached via radial bearing  54  to flange member  22  which is fixed to the end of the shaft  10 , and    flange portion  52  of the screw nut  44  abuts against the flange member  22  via thrust bearing  56 .