CHAPTER 4 - MACHINERY DANGER ZONE AND POINTS OF OPERATION
Ghapter 4
MAGHINE GUARDS AND SAFETIES
AT POINTS OF OPERATION AND
DANGER ZONES
Section 1.0 ScoPe
This chapter covers provisions for the protection of
machine operators against hazards at the points of
operation of machines. lt includes provisions for safe
use, design and guarding of points of operation and
danger iones for machinery utilized in various
indultries. Provisions of this chapler shall not be
interpreted as alternatives to those ciescribed in other
lnterlocked Gate Guard - a guard or gate barrier
the front or sides of the point of operation which
interlocked or connected to a tripping device which
prevent operation of the machine until the hand
i'rands of ihe operator have been removed from
chapters of this code.
danger zone.
Section 2.0 Definitions
Plate Shear
Danger Zone - and area of place near or at the point
those in process in the machine may come in contact,
or be caught by or between moving and/ or stationary
-
machine capable of shearing
stock more than 6mm thick
Point
parts of ihe machine. This includes areas where
materials or stock are fed into, processed and/ or
discharged from the iiachine.
of
Operation- the portions or areas
machine in which mechanical operations on the
or materials are performed. Such points of
shall necessarily include stock feeding and
points on the machine.
Doctor Feeds - a device employed to keep feed and
stock rolls clean and as$st in feeding stock into the in-
Power Press - motor-driven machines fitted
rams or dies for purposes of blanking,
drawing, punching, stamping, forming or assem
or feed rolls'on the machine. lt
usually
consisis of curved steel plates mounted in front of, and
leading to each pair of rolls. This plates extends
throughout the length of the rolls with its concave side
toward the rolls and its opposite edge held by spring or
gravity action against the surface of the top rolls'
-running
-
consists of
directly I
energy
utiliztng
or cold process machines
storage
mechanical
a
from
or
the prime mover,
onto a ram through a transmission and control
that releases . this energy in short bursts or
strokes.
lmpulse Metat Working Machines
materials.
Pull-Out Protective Device (Hand Fed).
mechanically operated device attached to
operator's hands, wrist or arms which withdraws
operator's hands from the danger zone as the
Drop Hammer - a heavy metal cylinder or hammer
wniCh is raised a practicable height and dropped so
that the force or energy of the blow is developed
descends.
entirely from gravitY.
machine part
- the reciprocating
cylinder. lt may also be called plunger,
Ram
Foot and Hand Press - machines actuated by foot or,
hand power only, and fitted with rams or dies for
purposes of blanking, trimming, drawing, punching,
stamping, forming or assembling cold worked
within
slide
mandrel.
Sweep Guards - a mechanically operated guard 1
sweeps the hands of the operator out of the way of
materials.
descending ram.
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