2015-machine safeguarding & pshr jk
TRANSCRIPT
By
Julian Kalac, P.Eng.
PRE-START HEALTH SAFETY REVIEWS
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Julian Kalac, P.EngJune 11, 2014
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Printing press 42 year old operator with 20 years exp. Pinch point – 150psi Distance from pinch point to safety stop◦ 8 feet
No guards in place Operator goes to remove a paper jam……..
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Hospitalized for 1 week Rehabilitation for 4-6 months Severed tendons & nerves Laceration to bone Missing nerves & tendons Loss of sensation Loss of range or motion Finger tips permanently bent
*These are onlyThe physical problems
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Any machine part, function, or process
which may cause injury must be safeguarded
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Any machine part, function, or process that may cause injury must be safeguarded.
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Rotating (including in-running nip points)
Reciprocating Transverse
Cutting Punching Pinching Shearing Bending
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Common rotating mechanisms◦ Collars◦ Couplings◦ Cams◦ Clutches◦ Flywheels◦ Shaft ends◦ Spindles◦ Horizontal/vertical shafting
Dangerous moving parts in these basic areas require safeguarding:
1. Point of operation
2. In running nip points
3. Pinch points
4. Power transmission
5. Other moving parts
Where Dangerous Mechanical Hazards Occur
Safeguarding can be accomplished by either machine
guards or machine devices.
Electrical
Hydraulic
Pneumatic
Mechanical potential energyGravitational potential energy –
Chemical energy
other
Helping Our Customers Be More Successful . . .
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Guards
◦ Fixed
◦ Interlocked
◦ Adjustable
◦ Self-adjusting
Devices Presence sensing
Photoelectrical (optical)
Radio frequency (capacitance)
Electromechanical
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Devices (cont’d)◦ Pullback◦ Restraint◦ Safety controls
Safety trip control
Pressure-sensitive body bar
Safety trip rod
Safety tripwire cable Two-hand control
Two-hand trip
◦ Gates Interlocked
Machines guards are there to protect from exposed hazards
Guarding MUST never be removed unless under supervision and locked out
If a Guard is missing notify your supervisor immediately
Never bi-pass the guarding!
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Provides a barrier - a permanent part of the
machine, preferable to all other types of guards.
Parts rotating in opposite direction
In-running nip point hazards
Rotating and tangentially moving parts
Rotating Parts
Point of contact between
a chain and a sprocket
Examples of 3 Types of Motion
Rotating and fixed parts
Transverse motion
Rotating and tangential motion
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Point of contact Blade not guarded
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Rotating pulley Rotating coupling
Burr
Rotating shaft
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Provides a barrier which may be adjusted to
facilitate a variety of production operations.
Bandsaw blade
adjustable guard
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Provides a barrier which moves according to
the size of the stock entering the danger area.
Circular table saw
self-adjusting guard
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Requires constant, concurrent pressure to activate the machine
The operator’s hands are required to be at a safe location (on control buttons) and at a safe distance from the danger area while the machine completes its closing cycle
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Movable barrier device which protects the operator at the point of operation before the machine cycle can be started
If the gate does not fully close, machine will not function
Gate Open Gate Closed
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When this type of guard is opened or removed, the tripping mechanism and/or power automatically shuts off or disengages, and the machine cannot cycle or be started until the guard is back in place.
Guards the dangerous part before the
machine can be operated.
Keeps the guard closed until the dangerous
part is at rest.
Prevent operation of the machine if the
interlocking device fails
May use electrical, mechanical, hydraulic, or
pneumatic power or any combination of these.
Should not prevent “inching” by remote
control, if required.
Replacing the guard should not automatically
restart the machine.
All moveable guards must be interlocked to
prevent hazards.
PRE-START HEALTH SAFETY REVIEW
Applicable provisions of Regulation 851 Circumstances
1. Subsections 22 (1), (2) and (4) Flammable liquids are located or dispensed in a building, room or area.
2. Sections 24, 25, 26, 28, 31
and 32
If any of the following are used as protective elements in connection with an apparatus:
1. Safeguarding devices that signal the apparatus to stop, including but not limited to
safety light curtains and screens, area scanning safeguarding systems, radio
frequency systems and capacitance safeguarding systems, safety mat systems, two-
hand control systems, two-hand tripping systems and single or multiple beam
systems.
2. The barrier guards use interlocking mechanical or electrical safeguarding devices.
3. Clause 45 (b) Material, articles or things are placed or stored on a structure that is a rack or stacking
structure.
4. Section 63 A process involves a risk of ignition or explosion that creates a condition of imminent hazard
to a person's health or safety.
5. Section 65 The use of a dust collector involves a risk of ignition or explosion that creates a condition of
imminent hazard to a person's health or safety.
6. Sections 87.3, 87.4, 87.5 and 88,
subsections 90 (1), (2) and (3),
and sections 91, 92, 94, 95,
A factory produces aluminum or steel or is a foundry that melts material or handles molten
material.
7. Sections 51 and 53 The construction, addition, installation or modification that relates to a lifting device,
traveling crane or automobile hoist.
8. Sections 127 and 128 This process uses or produces a substance that may result in the exposure of a worker in
excess of any occupational exposure limits as set out in Regulation 831
Machine guarding5 Steps to…Turning Workplaces Into Safe Places
1. Safety Audit / Risk Assessment
2. PSR (Pre –Start Safety Review)
3. Design And Installation
4. PSR Sign-Off …
5. Training and Documentation
Regulation 851, s. 76 of the OHSA
Where the starting of a machine, transmission machinery, device or thing may endanger the safety of a worker,
(a) Control switches or other control mechanisms shall be locked out; and
(b) Other effective precautions necessary to prevent any starting shall be taken
Safety Equipment
Separating Non-Separating
Fixed Movable MovableLocalizedApproach/person detection
Fence, Barrier,
requires tool
Doors, interlocked
guards
Mechanical, Tactile
Electro Sensitive
Two-Hand Control
Emergency Off
Enabling Device
Safety Mat Safety Edge Safety Bumper
AOPDLight curtain
AOPDDRScanner
PIPDSLight beam
DEFINING TYPE OF GUARDING
Applicable provisions of Regulation 851 Circumstances
1. Subsections 22 (1), (2) and (4) Flammable liquids are located or dispensed in a building, room or area.
2. Sections 24, 25, 26, 28, 31
and 32
If any of the following are used as protective elements in connection with an apparatus:
1. Safeguarding devices that signal the apparatus to stop, including but not limited to
safety light curtains and screens, area scanning safeguarding systems, radio
frequency systems and capacitance safeguarding systems, safety mat systems, two-
hand control systems, two-hand tripping systems and single or multiple beam
systems.
2. The barrier guards use interlocking mechanical or electrical safeguarding devices.
3. Clause 45 (b) Material, articles or things are placed or stored on a structure that is a rack or stacking
structure.
4. Section 63 A process involves a risk of ignition or explosion that creates a condition of imminent hazard
to a person's health or safety.
5. Section 65 The use of a dust collector involves a risk of ignition or explosion that creates a condition of
imminent hazard to a person's health or safety.
6. Sections 87.3, 87.4, 87.5 and 88,
subsections 90 (1), (2) and (3),
and sections 91, 92, 94, 95,
A factory produces aluminum or steel or is a foundry that melts material or handles molten
material.
7. Sections 51 and 53 The construction, addition, installation or modification that relates to a lifting device,
traveling crane or automobile hoist.
8. Sections 127 and 128 This process uses or produces a substance that may result in the exposure of a worker in
excess of any occupational exposure limits as set out in Regulation 831
Step 2--PSR review Report
•A pre-start review is a written report
that details measures taken to ensure that
the construction, addition, modification and
or installation of a new apparatus,
protective element or process is compliant
with current standards before production
begins.
•Pre-Start Health & Safety Review is a report written by a PROFESSIONAL ENGINEER** that details the measures necessary for compliance with applicable sections.
•This is done at the design stage and the report will outline the steps needed for compliance. These steps or measures are to be completed by the employer before any production operation begins.
Safety Equipment
Separating Non-Separating
Fixed Movable MovableLocalizedApproach/person detection
Fence, Barrier, requires
tool
Doors, interlocked guards
Mechanical, Tactile
Electro Sensitive
Two-Hand Control
Emergency Off
Enabling Device
Safety Mat Safety Edge
Safety Bumper
AOPDLight curtain
AOPDDRScanner
PIPDSLight beam
DEFINING TYPE OF GUARDING
BLACK CLAWSON LAMINATOR SHUT DOWN BY MOL
Exposed rotating nip points,
Exposed rotating nip points to be
guarded,
Interlock system Mesh guarding with
light curtains
Secondary E-stop
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Management◦ ensure all machinery is properly guarded
Supervisors◦ train employees on specific guard rules in their areas◦ ensure machine guards remain in place and are
functional◦ immediately correct machine guard deficiencies
Employees◦ do not remove guards unless machine is locked and
tagged◦ report machine guard problems to supervisors
immediately◦ do not operate equipment unless guards are in place
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Why must machines be guarded? What are the machine hazards ? When can you remove a guard? What to do if a guard is missing or damaged?
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Any machine part, function, or process that may cause injury must be safeguarded.
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