In this safety talk we will discuss the significance of machine guarding, its various types, and essential safety measures to keep us all safe from moving parts of machinery.
Introduction
Machine guarding involves protecting workers from the hazards posed by moving parts on machinery. These hazards can include rotating parts, belts, chains, conveyors, and other mechanical motions that can result in serious injuries if not properly guarded.
Why is Machine Guarding Important?
Every year, numerous workers suffer from injuries caused by unguarded or inadequately guarded machines. Incidents such as amputations, lacerations, crushing injuries, and even fatalities can occur if machines are not properly safeguarded. To prevent such accidents, it is crucial to implement and maintain proper machine guards.
Types of Machine Guards
Fixed Guards:
- These guards provide a permanent barrier between the worker and the hazardous area of a machine.
- Installation doesn’t need frequent replacement or adjustment, which enhances reliability.
Interlocked Guards:
- These guards are designed to stop the machine automatically when the guard is opened.
- They are effective but require regular maintenance to ensure proper functioning.
Adjustable Guards:
- These can be adjusted to different settings and positions.
- Commonly used in situations where flexibility is required for different processes and materials.
Self-Adjusting Guards:
- These guards adjust automatically based on the movement and operation of the machine.
- They provide convenience and operational flexibility.
Key Safety Measures
Ensure Proper Installation:
- Guards should be installed on all moving parts of machinery that are 2.5 meters (8.2 feet) or less above the working surface. Note: The height can vary depending on your company procedure or legal regulations.
Routine Maintenance and Inspection:
- Regularly check and maintain guards to ensure they are in good working order.
- Guards that have been removed for maintenance should be re-installed correctly before the machine is put back into service.
Design and Construction:
- Guards should be robust enough to withstand failure of the moving part.
- Openings in guards should be no larger than 1.3 cm (0.5 inches) to prevent finger access to the hazardous area.
Training and Awareness:
- All personnel should be trained on the importance of machine guarding and how to identify potential hazards.
- Ensure employees understand the correct operation of machine guards and the risks of tampering or bypassing them.
Personal Protective Equipment (PPE):
- Along with machine guards, appropriate PPE such as safety goggles, gloves, and hearing protection should be worn as necessary.
Procedures for Specific Machinery
Conveyor Systems:
- All pinch points, pulleys, and rollers on conveyor systems should be guarded.
- Emergency stop pull cords and on/off switches should be accessible and clearly marked.
Concrete Mixers and Trowels:
- Mixers of 0.75 m³ capacity or larger should have mechanical devices to clear materials and guardrails installed.
- Rotary trowels should have automatic control switches (“dead man” switches) to shut off power if the operator’s hands leave the handles.
Conclusion
In summary, machine guarding is a vital component of workplace safety. Proper installation, maintenance, and use of guards can prevent severe injuries and save lives. Always follow safety protocols, use the right guards, and never bypass safety measures. Remember, safety is everyone’s responsibility.
