2-5
Mechanism
and Operation
2-3-2. Punch Unit Drive Mechanism
Punch unit is composed of guide A, B, punch bar, cam, cam lifter, drive shaft,
and single punch clutch (CL2).
2-3-3. Punch Unit Drive
When transport motor is driven, the punch unit’s drive gear rotates punch
unit’s clutch gear.
But the driving force is not transmitted to drive shaft because the punch clutch
(CL2) is normally OFF and locked.
When CL2 is turned ON and the lock is released, the clutch gear’s rotation is
transmitted to the drive and the drive shaft is rotated.
(CL2 is turned ON momentarily, and is locked after one rotation, stopping the
movement of the shaft)
A rotation of the drive shaft causes a single vertical movement of punch bar
which is supported by the cam, punching the paper.
