The hazardous zone extends beyond the head
Danger is not limited to the point where a case is placed. A lift can descend, a pusher can travel and a conveyor can introduce another pallet. Assessment must cover the complete installation, including gaps between machines and spaces where someone could be crushed against a fixed structure.
Infeed and outfeed Belt conveyors need arrangements that let products travel without becoming routes for people. Fencing one side does not compensate for an open passage elsewhere. An interlocked gate is insufficient if a different opening lets someone enter the protected area.
A production stop can conceal stored movement
A skewed pallet or displaced layer of cases can stop the cycle without removing hazardous energy. Releasing the obstruction may allow a load to fall or move suddenly. Pneumatic or hydraulic pressure can remain, alongside gravitational energy in raised components or materials.
Intervention therefore requires a specific isolation and energy-control procedure, performed by authorised personnel. An emergency stop is not a substitute. Informally entering for a few seconds to straighten products while someone watches the controls does not establish a protected maintenance condition.
Coordinate access and restart
The installation must define which equipment stops when an access point opens, which neighbouring equipment remains active and how restart is prevented while somebody is inside. Blind spots, shift changes and external maintenance personnel belong in that assessment, rather than being left to individual assumptions.
Protective checks must cover every intended mode, particularly setting and maintenance. A different pallet, product or layer pattern can change load stability and working positions. Such changes are not merely production-programming matters and should be reviewed before routine operation resumes.
What to review during a safety visit
Observe from outside where jams arise, how loads travel and how empty pallets are replenished. Ask who may intervene and how clearance of the zone is confirmed before restart. Repeated entry or falling cases should trigger technical review of feeding, stability and safeguards. Record the exact location and operating condition of faults so that maintenance can address their cause without normalising access to the automatic enclosure.
