Guards Prevent Access If Infeasible Devices Control Access

Guards Prevent Access If Infeasible Devices Control Access 1

Requirements of Safeguards n n n Prevent contact Secure Protect from falling objects Create no new hazards Create no interference Allow safe lubrication 2

Where Mechanical Hazards Occur n n n Point of operation Power transmission apparatus Other moving parts – Nip points – Pinch points – Shear points – Rotating parts – Flying parts 3

Training n n n Description and identification of hazards How they provide protection How to use safe guards When to remove Protocol when safeguards are missing 4

Methods of Guarding Guards n Devices n Location/distance n Feed mechanisms n Miscellaneous aids n 5

Guards n n n Barrier to prevent access to danger Fixed guards Interlocks Adjustable Self-adjusting Stock Exit Stock entering danger zone Transparent insert in front panel 6

Fixed Frame Panel 7

Box Barrier Guard without Inserts 8

Adjustable Panels Rigid - Adjustable Fixed - Adjustable 9

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. 10

Three and Five Panel Barrier Guard Are designed to meet point-of-operation requirements. Rear of machine must also be guarded when applying front and side guards. 11

Interlock Safety Switches 12

Devices n n n n n Presence-Sensing Radiofrequency Electromechanical sensing device Pullbacks Restraints Safety Trip Controls Two-Hand Trip Gates 13

Presence Sensing Device Transmitters Receivers Control Box Interconnecting Cables 14

Arm-Type Device Arms 15

Arm-Type Pullbacks 16

Overhead-Type Pullback 17

Restraint Device - Arm-Type Restraint 18

Two-Person Overhead Sliding Restraint 19

Control Package with Light Curtain Interface or Two-Hand Control Box Light Curtains on Floor Stands Two Operator Stations Barriers 20

Press brake with two-hand control sequence Emergency Stop Two-hand Controls 21

Gate Guards - Type “A” and“B” 22

Location/Distance n n n n Hazard analysis Hazards not accessible Walls Fences Height Stock dimension Operators station 23

Press Safety Distances Distance of Opening from Point of Operation Hazard (inches) Maximum width of opening (inches) 1/2 to 1 -1/2 to 2 -1/2 to 3 -1/2 to 5 -1/2 to 6 -1/2 to 7 -1/2 to 12 -1/2 12 -/12 to 15 -1/2 to 17 -1/2 to 31 -1/2 1/4 3/8 1/2 5/8 3/4 7/8 1 -1/4 1 -1/2 1 -7/8 2 -1/8 24

Press Safety Distances (cont’d) n 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 25

Feeding & Injection n n Automatic feeding Semi-automatic feed Automatic injection Semi-automatic injection Robots 26

Robot Safeguarding Station Control Guard Machine Safety Mat Light Curtain Receiver Robot Parts Bin Parts Chute Guard Light Curtain Transmitter Mirror 27

Miscellaneous Aids n Awareness barriers n Shields n Holding tools n Push stick or block 28

Signs for Machinery OPERATOR SAFETY PRECAUTIONS Handout for Anyone Operating This Machine Before You Operate This Machine You Must Read and Understand These Safety Precaution ! DANGER NEVER Place Your Hands or Any Part of Your Body in This Machine See Reverse Side for Other Safety Precautions. 29

Signs For Machinery ! PELIGRO ARIETE HIDRAULICO Y TROQUEL CIERREN RESULTARA EN LA PERDIDA DE DEDOS O DE MEMBROS SI ESTAN METIDO EN LA MAQUINA NUNCA USW UN PEDAL DE PIE PARA OPERAR ESTA MAQUINA A MENOS QUE SE PROVEE Y MANTIENE UN PROTECTOR DE SEGURIDA PARA EVITAR QUE LAS MANOS U OTRAS PARTES DEL CUERPO ENTREN EN LA MAQUINA. NO SE DEBE QUITAR O TAPAR ESTE LETRERO. VEA L REVES PARA MAS INSTRUCCIONES. 30

Free-Standing shield used around machines to protect people from flying objects 31

Shield on milling machine 32

Sliding Lathe Shield 33

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