ISO/TR 9172:1987

Continuous mechanical handling equipment — Safety code for screw conveyors — Examples of guards for trapping and shearing points

Gives examples of the kinds of hazards associated with screw conveyors at danger points, in particular trapping and shearing points located between the moving screw and the fixed parts of the conveyor or surrounding structures. Describes different safety devices, illustrated by examples of design sheets, capable of meeting the general safety requirements.