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 15.3.19 Vertical Articulated Platform Conveyors
Control systems shall include means to prevent jamming or spilling objects. Means shall be
provided to stop the conveyor in the event a jam occurs. The conveyors shall be enclosed to
prevent inadvertent physical contact with the moving parts of the equipment. The entry and exit
openings in the enclosure shall be guarded by extending the enclosure side guards a safe distance
from the path of the vertically moving platform. A top cover shall be provided to form a tunnel
if practical.
15.3.20 Vertical Chain Opposed Shelf Type Conveyors
Overload devices shall be furnished to stop the conveyor in the event a jam occurs. The
conveyor shall be housed so as to prevent inadvertent physical contact with the moving parts of
the equipment. The conveyor housing should be equipped with doors or equivalent devices at
each manual loading and unloading station, interlocked so that they can be opened when the
carrier has stopped and the carrier cannot be moved until they are closed. Vertical chain opposed
shelf type conveyors automatically receiving or discharging objects should have a similar device
or be guarded by a suitable enclosure extending on all sides a safe distance from the path of the
carrier platform.
15.3.21 Vertical Reciprocating Conveyors
Means shall be provided to prevent hazard to personnel in the event of mechanical or electrical
failure. The carrier must be equipped with backstop devices sufficient to stop and to hold the
carrier and load. Overtravel devices shall be provided where necessary to minimize potential
for injury to personnel. Riding the conveyor shall be forbidden to all personnel. warning signs to
this effect shall be prominently posted at each point of access and each point of operation. The
conveyor shall be guarded so as to prevent inadvertent physical contact. The housing should be
equipped with doors or an equivalent device at each manual loading and unloading station,
interlocked so that they can be opened only when the carrier has stopped at that level and the
carrier cannot be moved until they are closed. Conveyors automatically receiving or discharging
objects should have a similar device or should be guarded by a suitable enclosure extending on
all sides a safe distance from the path of the carrier. Where the application requires that
personnel walk onto the carrier to load or unload, the carrier shall be provided with standard
railings, with snap chains across the operating ends or equivalent. Controls must be located so
they cannot be actuated by a person on the carrier. This is done to prevent a person from riding
on the equipment.
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