2.12.4 Cleaning mechanism
A rubber cleaning blade scrapes toner and other foreign
matter from the roller surface.
2.12.5 Oil pump mechanism
Oil pump
An oil tank is provided on the lower side of the vertical
transport unit to supply silicon oil to the fusing unit via a
tube and pump.
When the main motor is running, the vertical transport
roller rotates to drive the link pin disk. The link swings to
the left and right. When the oil pump cam reverses, the
ratchet prevents oil pumping, and the cam rotates in the
direction of the arrow, to the left and right, by the
reciprocating action of the link. The actuator performs a
reciprocating motion by rotation of the cam, and the oil
tube valve is pressed by the lower side of the actuator.
Two valves are provided on the upper and lower sides of
the tube to prevent reverse flow and pump the oil.
Oil flow
Pumped silicon oil drops from the oil tube outlet into the
oil receiver and flows into the oil sump. The oil flows to
the bottom of the oil sump where it is absorbed into the
oil supply pad. Surplus oil drops into the upper oil pan
and flows to the front of the machine. Next, the oil flows
into the large oil pan and is sent through the oil
collecting guide to the collecting tube.
A rubber stopper is provided at the discharge port of the
oil collecting guide. If the fusing unit is set, the rubber
stopper is moved up by the roller on the slide guide rail
and the oil flows out.
When the unit is removed, the rubber stopper plugs the
discharge port to prevent oil from leaking.
Oil blade
Link pin disk
Link
Oil tube valve
Oil tube valve
Oil tank (3,000 cc)
Actuator
Oil pump cam
Vertical transport roller
Actuator
(lower side)
Oil receiver
Nipple
Roller
Rubber
stopper
Collecting tube
Discharge port
Oil collecting guide
Large oil pan
Upper oil pan
Oil sump
Oil supply pad
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