lecture 6.2-cdb 2012-may 2014.pdf

8/12/2019 Lecture 6.2-CDB 2012-May 2014.pdf

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CDB2012

Health, Safety and

Environment

Machine Safeguarding

Lecture 6.2

Dr. Abrar Inayat

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Introduction control measures through effectivemachine guarding

Basic knowledge of lock out/tagout system.

Information of personal protective equipment (PPE)

OBJECTIVE


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Mechanical Hazards

How to reduce

mechanical hazards?

MACHINE SAFEGUARDING


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Machine Safeguarding - Purpose

To minimize the risk of accidents due to direct

contact between human (operator) and machine

Direct contact can be :

Operator direct contact with machine because of

fatigue, distraction, careless etc.

From machines such as flying chip and hot metal

splashes Direct results of machine malfunction


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Machine Safeguarding - Purpose

Safeguards are essential for protecting workers from

needless and preventable injuries.

Any machine part, function, or process which many

cause injury must be safeguarded.

Immediate corrective actions, including stopping the

machine, must be taken when a potential mechanical

hazard is observed

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WHAT MAKES A GUARD EFFECTIVE ?

Must prevent human contact with any potentially

harmful machine part

Must not present a hazard in itself or create

interference

Must not allow objects to fall into moving parts

Allows safe maintenance and lubrication.


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There are many ways to safeguard machines depending

on :

Type of operation

Size or shape of machine

Physical layout of the work area

Type of material

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GUARDS (prevent) - are always preferred and

more practical to be used for power transmission

(motion).

DEVICES (control) - are sometimes a more

practical option when safeguarding point of operation.


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GUARD DEVICE

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Point of Operation Guards :

Fixed Guards Interlocked guards


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Lockout/Tagout System :

To protect against the unexpected activation of a

machine that is supposed to be turned off

Lockout system- a padlock is used to prevent a

machine from being turned on until the lock is

removed.

Tagout systemsimilar to lockout system, but use

tag instead of lock


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Lockout/Tag-out System


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TRAINING

Safeguarding system cannot offer effective

protection against mechanical hazards unless the

worker knows how to use it and why.

Safety training is necessary for operators and

maintenance or set-up personnel when any new or

altered safeguards are put in service.

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PROTECTIVE CLOTHING/PERSONAL

EQUIPMENT

Must appropriate for the particular hazards

Maintained in good condition

Properly stored when not in use to prevent damageor loss

Kept clean and fully functional.


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Mechanical Hazards/Machine

Safeguarding

CONCLUSION

Use tagout procedures before service,

maintenance, or repair jobs on machines or

equipment.

Follow standard operating procedures (SOP) :

implement safe work steps to check, set up

machines, start, and finish job or task.

Inspection and maintenance : inspect the

machinery, guards, and your entire work area,

regularly and often.


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Mechanical Hazards/Machine

Safeguarding

Emergency preparation and regular drills : tobeprepared and able to respond effectively to

minimize loss.

Human factor planning : To allow operator

regular relief and change from repetitive tasks

on production lines, to avoid fatigue, strains,

sprains, and other injuries or accidents through

regular breaks and task variety.

Training : Conduct training on workplace

inspection, housekeeping and emergency

action and response.


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lecture 6.2-cdb 2012-may 2014.pdf

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