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wheel conveyor. The second is the portable
power-driven belt conveyor.
The gravity-type roller or wheel conveyor can
be installed with one end lower than the other to
take advantage of gravity or it can be installed
level and the load pushed along manually. Several
sections can be put together and developed into
a continuous system for movement of material on
the ship during underway replenishment or
vertical replenishment. The conveyor can also be
used on piers, in storerooms, or wherever a steady
flow of supplies is desired.
The power-driven belt conveyor consists of an
endless belt mounted on a frame and driven by
a pulley connected to a drive motor. The belt
travels over a series of rollers or a sliding bed. The
belt conveyor can be used to transport materials
over a fixed path of travel up inclines of as much
as 25 degrees.
Ladder Chute
The ladder chute shown in figure 4-8 provides
a rapid means of conveying packages downward.
The principal application is aboard ship where a
need exists to strike down stores.
MANUAL HANDLING
As we mentioned earlier, a great deal of
material handling is done manually. It is
important that you understand how to lift
correctly because many times personnel in
working parties and other material handlers do
not think about how they lift or handle materials.
The results of improper handling of materials may
be a painful hernia, a strained or pulled muscle,
or a disk lesion. The correct method of lifting
objects is shown in figure 4-9. You should observe
the following rules and precautions for lifting:
1. Do NOT lift an object if it is too heavy or
too bulky for good balance. Get help or use
mechanical aids such as a dolly or hand truck.
2. Keep the load close to the center of your
body. The farther the load is from the small of
your back, the greater the strain. That is the
reason a heavy compact load is easier to lift than
a bulky lighter load—you just cannot get the
Figure 4-8.—Stores strike-down chute.
4-10
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