Be sure to adopt a guard-type protection when flying of fragments due to breakage of the die
is foreseeable. Flying of fragments is not limited toward the front. Be sure to consider
protection of persons other than workers.
With automatic machines, an accident is likely to occur at setup more than in normal
production.
It is recommended to adopt interlock which disables even jogging function when the guard is
open.
2-7. Protection from flying objects
9
Other than the hazardous area created with the die, there are places where a part of your
body is possibly pinched.
When using a mechanical knockout device, you need to consider the risk where a third
person erroneously activates the machine during adjustment or a third person accidentally
touches the machine while it operates.
If entry to the vicinity of the knockout device cannot be restricted, you need to increase the
protection height of the side guard and the side light curtain.
2-8. Measures against pinch hazard with knockout device
Protection
examples
Interlocking front guard
Automatic movable
front guard
Protection
examples
Side guard
(with extended
protection height)
Light curtain
(with extended
protection height)
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