Drive System - Toshiba MR-2012 Service Manual

4.3 Drive System

Pickup roller
Front side
Spring Clutch
Feed roller
Rear side
ADF motor
Read roller
One-way clutch
ADF 04-03-01
The driving force of the ADF motor is transmitted to each roller through the gears and belts. It is transmit-
ted to the feed rollers through the timing belt and gears (3 pcs.) and further transmitted to the pickup roller
through the timing belt. The driving force is transmitted to the read roller through the two timing belts and
the gears connecting them. The shaft part of the read roller is provided with a one-way clutch allowing the
driving force of the ADF motor to be transmitted only in the transport direction (counterclockwise) for
rotation.
Document Feed
The document is fed as the ADF motor turns clockwise as viewed from the front (in the direction of the
black arrow). When the ADF motor turns clockwise, the pickup roller lowers to pull in the document. At this
time, the read roller does not turn due to the function of the one-way clutch.
Document Transport
The document is transported as the ADF motor turns counterclockwise as viewed from the front (in the
direction of the white arrow). When the ADF motor turns counterclockwise, the pickup roller ascends
causing the spring clutch mounted on the feed roller shaft to slip so that the driving force is no longer
transmitted.
MR-2012 MECHANICAL DESCRIPTION 4 - 4 October 2000 © TOSHIBA TEC