transnorm TS 1300 - Page 59

Maintenance and repair
Guards
59
machine.
TRANSNORM provides captive fasteners for protective devices if the oper-
ating company needs to detach a safety device from a machine. This is
necessary for maintenance and cleaning. Generally no hazard is posed by
the loss of captive fasteners when a fixed guard is removed from the
machine by technical personnel only to conduct repairs.
TRANSNORM uses fixed guards to provide effective protection in hazardous
areas. Such protective devices may include covers
 that are rarely/never removed
 that are opened/removed only by technical personnel
 that cover only a low risk potential
 that are located on machines that are operated behind a master protec-
tive cover/enclosure
No captive fasteners are fitted on these covers as the potential risk is classi-
fied as low. In this case, the individual parts normally remain assembled
when carrying out repairs on site or in the workshop.
Guards that need to be opened/removed by the operating company for main-
tenance purposes generally comprise the following covers:
 Covers on drive assemblies (e.g. protective covers/hoods for chain and
toothed belt drives)
 Covers on pinch points if they have to be removed or opened for mainte-
nance purposes (e.g. protective covers for snub rollers)
 Bearing covers, covers on rotating parts (e.g. covers on pulley bearings)
 Bottom covers (e.g. perforated plate of curves)