The load moves over the rollers by
gravity or by men force. In other words, products are moved over conveyors
between different points that can be at level or at different heights. In
case of different heights, the load is simply placed at one end of the
conveyor and by gravity it will move to the other end.
The gravity conveyor with
different height stands.
The conveyors have become really
important in industries that require easy handling of products from one
place to another. Conveyor's applications vary, from box or package handling
in a ware house to sophisticated assembly lines. Conveyors are also common
in handling agricultural products in packaging plants. In this cases, the
fruit or vegetable is moved by trays or in their respective packaging box
depending on the stage of handling.
The conveyors consist, in their
simplest form, of two frames joined with rollers or wheels,
that carry the loads or products.
Gravity conveyors in a
Gravity conveyors handling heavy loads with different roller sizes.
The design of the conveyor is
basically influenced by the loads to be handled. It is important to
understand from the beginning the quantity of rollers needed. The next
image shows that is necessary to use three or more rollers to support the
load and four rollers or more in case the load has an irregular surface.
This way the load will experience no trouble moving over the rollers.
|A minimum of
three rollers per load.
||Less than three
rollers make the load unstable.
||Three rollers or
more are required for unstable loads.
It is possible to manufacture conveyors on a
straight line or in curves, depending on the path needed to carry the
To select a conveyor accurately, it is very
important to clearly identify the characteristics of the load that will be
handled. Once this information is acquired, a conveyor will be designed
utilizing the most appropriate roller as well as the optimal structure or
GO TO ROLLER SELECTION