Machine Safety, PPE, LOTO Flashcards
That point where work is performed on the material, such as cutting, shaping, boring, or forming.
Point of Operation
All components of the mechanical system that transmit energy to the part of the machine performing the work.
Power Transmission Apparatus
Hazardous Mechanical Motions
Rotating, Reciprocating, Traversing
Turning Around on an axis or center
Rotating
The back and forth movements of a machine part
Reciprocating
Continuous straight line motion of a machine element in either direction
Traversing
Draw objects in and the effect is crushing or shearing injury
In-running nip points
Between rotating part and tangentially moving part or fixed part
Pinch Points
Reciprocating Machine Movements
Punching, Shearing, Bending
To minimize the risk of injury to machine operators or other persons from hazardous machine parts, materials being processed, or scrap.
Purpose of Machine Safeguarding
Methods of Machine Safeguarding
Guards, Devices
Are barriers that prevent entry of an individual’s hands or other body parts into a hazard area
Guards
Types of Guards
Fixed, Interlocked, Manually Adjustable, Self-adjusting
This type of guard is attached to a fixed surface and encloses thee hazard
Fixed Barrier Guard
This type prevents machine motion until the guard is moved into place.
Movable guards w/ interlocking switches
This type of guard can be positioned to accommodate a variety of operations or work and when properly adjusted provides
adequate protection from the hazard at the point of operation.
Adjustable Guard
Provides a barrier which moves according to the size of the stock entering the danger area.
Self-Adjusting guard
Any Mechanical or electrical devices designed to protect a worker’s hands or other body parts from
coming into contact with a hazardous motion of a machine
Safety Devices
Holdout and restraint devices are cable and wristlet systems that
attached to an operator’s hands and to the machine’s moving
slide or ram, or to a fixed object away from the point of
operation.
Pullbacks and Restraint Devices
are operator controls that require an operator to hold both controls down during the hazardous portion of the machine’s stroke
Two-hand controls
These are designed, constructed, and arranged to create a sensing field, area, or plane that will detect in its field the presence of an opaque object
Presence-sensing Devices
Provides some protection from flying particles, splashing cutting oils or coolants
Protective Shields
The standard for the control of hazardous energy sources which covers maintenance of machines in which the unexpected start up of machines or release of stored energy could cause injury to employees.
Lock-out/Tag-out System (LOTO)
A device that utilizes a positive means such as a lock
either key or combination type, to hold an energy isolating
device in the safe position and prevents the energizing of a
equipment
Lockout devices