1 guards prevent access if infeasible devices control access
TRANSCRIPT
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Guards
Prevent Access
If Infeasible
Devices
Control Access
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Requirements of Safeguards Prevent contact Secure Protect from falling objects Create no new hazards Create no interference Allow safe lubrication
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Where Mechanical Hazards Occur Point of operation Power transmission apparatus Other moving parts
– Nip points– Pinch points– Shear points– Rotating parts– Flying parts
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Training
Description and identification of hazards
How they provide protection How to use safe guards When to remove Protocol when safeguards are
missing
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Methods of Guarding
Guards Devices Location/distance Feed mechanisms Miscellaneous aids
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Guards
Barrier to prevent access to danger
Fixed guards Interlocks Adjustable Self-adjusting
Stock Exit
Stock enteringdanger zone
Transparent insertin front panel
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Fixed Frame Panel
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Box Barrier Guard without Inserts
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Adjustable Panels
Rigid - Adjustable Fixed - Adjustable
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Two and Four Panel Barrier Guard
Not considered a safeguard. Are used with safeguarding devices such as two-hand trips, presence sensing devices, pullback, or restraints. Designed to protect sides of the point of operation while the front is open for feeding and removing of pieceparts.
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Three and Five Panel Barrier Guard
Are designed to meet point-of-operation requirements. Rear of machine mustalso be guarded when applying front and side guards.
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Interlock Safety Switches
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Devices
Presence-Sensing Radiofrequency Electromechanical sensing
device Pullbacks Restraints Safety Trip Controls Two-Hand Controls Two-Hand Trip Gates
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Presence Sensing Device
Transmitters Receivers
Control Box
Interconnecting Cables
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Arm-Type Device
Arms
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Arm-Type Pullback
Pullbacks
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Overhead-Type Pullback
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Restraint Device - Arm-Type
Restraint
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Two-Person Overhead Sliding Restraint
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Light Curtainson Floor Stands
Two Operator Stations
Barriers
Control Box
Control Package with Light CurtainInterface or Two-Hand Control
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Press brake with two-hand control sequence
Two-hand Controls
Emergency Stop
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Gate Guards - Type “A” and“B”
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Location/Distance
Hazard analysis Hazards not accessible Walls Fences Height Stock dimension Operators station
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Press Safety Distances
Distance of Opening from Pointof Operation Hazard (inches)
Maximum width of opening (inches)
1/2 to 1-1/2 1-1/2 to 2-1/2 2-1/2 to 3-1/2 3-1/2 to 5-1/2 5-1/2 to 6-1/2 6-1/2 to 7-1/2 7-1/2 to 12-1/212-/12 to 15-1/215-1/2 to 17-1/217-1/2 to 31-1/2
1/4 3/8 1/2 5/8 3/4 7/81-1/41-1/21-7/82-1/8
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Press Safety Distances (cont’d)
Once a safe distance is calculated, note the following to right of press.– Date of measurement– Stopping time– Safe distance calculation– Added distance to allow for normal
deterioration– Forward most point of operation– Fixed location of safety device/guard
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Feeding & Injection
Automatic feeding Semi-automatic feed Automatic injection Semi-automatic
injection Robots
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Robot Safeguarding
StationControl Machine Guard Light
CurtainReceiver
MirrorLight Curtain Transmitter
Guard
PartsChute
SafetyMat
Robot
Parts Bin
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Miscellaneous Aids
Awareness barriers
Shields
Holding tools
Push stick or block
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OPERATORSAFETY PRECAUTIONS
Handout for Anyone Operating This Machine
Before You Operate This Machine You MustRead and Understand These Safety Precaution
DANGER
NEVERPlace Your Handsor Any Part of Your Body in ThisMachine
See Reverse Side for Other Safety Precautions.
Signs for Machinery
!
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PELIGROARIETE HIDRAULICO Y TROQUEL CIERREN
RESULTARA EN LA PERDIDADE DEDOS O DE MEMBROSSI ESTAN METIDO EN LA MAQUINA
NUNCA
USW UN PEDAL DE PIE PARAOPERAR ESTA MAQUINA AMENOS QUE SE PROVEE YMANTIENE UN PROTECTOR DESEGURIDA PARA EVITAR QUELAS MANOS U OTRAS PARTESDEL CUERPO ENTREN EN LAMAQUINA.
Signs For Machinery
!
NO SE DEBE QUITAR O TAPAR ESTE LETRERO. VEA L REVES PARA MAS INSTRUCCIONES.
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Free-Standing shield used around machines to protect people from flying objects
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Shield on milling machine
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Sliding Lathe Shield
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