Typical conveyor hazards
By Staff -- Modern Materials Handling, 3/1/1998
Guarding is typically required at the following elements of a conveyor system:Power transmission interfaces-includes drives, gears, shafts, couplings.
Nip points-where an object moving in a line or rotating meets another similarly moving object (belt and pulley, meshing of gears, takeoff point on a belt conveyor).
Shear points-where a moving conveyor part meets or passes close to a stationary point (i.e., a building wall).
Pinch points-area where pinching can occur as reciprocating, oscillating, or vibrating conveyors come close to fixed machinery or objects.
Spill points-requires guarding where material could spill from a conveyor. For example, side rails are used on an overhead conveyor moving cartons.
Areas under counterweights-enclosures or other means are used to keep people away from such areas.
Transfer mechanism-device that transfers materials onto or off a conveyor, or from one conveyor to another.
Passage areas under conveyor-special attention is needed for drive, takeup, and service areas involving overhead conveyors.
Exposed edges of conveyor-certain circumstances may require continuous guarding, as where sprockets are present.
Special circumstances-all exposed moving parts of a conveyor that present a hazard to employees at their work stations should be mechanically or electrically guarded, or guarded by location or position to prevent accessibility.
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