Conveyors are used to move materials and supplies in and out of a work site, from one part of the plant to another, and between workstations. Conveyors can be powered or use gravity or momentum to transport objects. Gravity conveyors include those that have rollers, wheels or chutes.. Conveyors are convenient and beneficial for quickly moving materials, but operating an unguarded conveyor can lead to serious injuries and death.
Remember! Working at a conveyor or belt may include manual material handling, including repetitive motions, reaching, and lifting that may lead to musculoskeletal injuries, especially when movements are done quickly and for a long period of time.
Conveyors must be designed and installed with attention to worker safety, as well as productivity. Common hazards around conveyors include:
Employers are responsible for ensuring that conveyors and machinery are safe, and that all applicable regulations are followed. Employers must identify job-related hazards. Once the hazards are identified, the employer must implement safe work procedures, with input from the joint health and safety committee (JHSC), or health and safety representative. If the workplace does not have a JHSC or health and safety representative, the employer should work directly with the affected employees and supervisors to identify hazards and safeguarding solutions. Employers are responsible to train their employees on the safe use, maintenance and repair of conveyors and the safety devices.
Specifically, employers must ensure that:
Where conveyor belts are used underground:
"Powered" or "power" conveyors include the use of belts, live rollers, slats, or buckets. Locate the emergency stop cut-off switches for power driven conveyors and ensure they are accessible to employees at:
Screw conveyors are troughs with a revolving shaft with a spiral or twisted plate. The revolving mechanism and any connections to the power source should be enclosed, except for the loading and unloading points. Screw conveyors must:
If flammable materials will pass through a pneumatic conveyor's fan, it must be made intrinsically safe by:
When working with an enclosed or pneumatic conveyor carrying explosive or flammable material:
General Regulation - Occupational Health and Safety Act
N.B. Reg. 91-191
Part XVI MECHANICAL SAFETY
Section 241 Contact with Machines
241. (1) An employer shall ensure that sufficient space is provided around a machine in order to ensure the safety of employees while the machine is being operated or while cleaning, maintenance, adjustments or repairs to the machine are being carried out.
(2) Where an employee or the employee's clothing may come into contact with moving parts of a machine or a moving machine, the employee shall
(a) wear close fitting clothing,
(b) confine or cut head and facial hair, and
(c) not wear jewellery, rings, dangling neckwear or similar items.
Section 255 Conveyors
255. (1) An employer shall ensure that a conveyor is constructed and installed so that
(a) sufficient clearance is provided between the material transported and any fixed or moving object,
(b) shearing points between moving and stationary parts are avoided, and
(c) the conveyor is not able to feed onto a stopped conveyor.
(2) An employer shall ensure that a power driven conveyor to which an employee has access is provided with emergency stop devices at
(a) loading and unloading stations,
(b) drive and take up sections, and
(c) other convenient places along the run of the conveyor.
256. (1) An employer shall ensure that a conveyor installed underground or in any other place where a belt fire of the conveyor may endanger the life of an employee is
(a) made of fire resistive material, or
(b) protected by an adequate automatic fire extinguishing system.
(2) Where it is necessary to maintain a fire separation between parts of a building, an employer shall ensure that a spiral chute conveyor is
(a) enclosed in a shaft made of fire resistive material with doors at each end of the shaft, or
(b) provided with automatic fire doors or draft checks when the chute of the conveyor passes through the parts of the building.
257. An employer shall ensure that a conveyor that carries a load up an incline is equipped with an anti-rollback device.
258. (1) Where employee access to an elevated conveyor is necessary, an employer shall ensure that the elevated conveyor has a walkway along its entire length that is not less than 500 mm wide and is equipped with guardrails.
(2) Where an employee is required to cross over a conveyor, an employer shall ensure that adequate crossing facilities are provided.
259. (1) Where there is danger of injury to an employee from material falling from a conveyor, an employer shall ensure that sheet metal or screen guards are installed under or along side the conveyor if it is not entirely enclosed so as to prevent the material from falling.
(2) Where there may be danger of injury to an employee who is in proximity to a belt conveyor, an employer shall ensure that the conveyor is provided with adequate safeguards extending 1 m from the pulleys and along the sides of the conveyor.
(3) An employer shall ensure that an inclined bucket conveyor is enclosed with a solid safeguard that has one or more wire glass windows and that is not less than 2.1 m in height extending to the full height of the conveyor.
(4) An employer shall ensure that a screw conveyor is placed in metal troughs fitted with secured covers of not less than 3 mm thick metal plates in removable sections or of other material that provides equivalent protection.
(5) An employer shall ensure that when a screw conveyor is fed from the floor level, adequate safeguards are provided around the opening.
260. (1) An employer shall ensure that an enclosed or pneumatic conveyor used for carrying combustible or flammable material of an explosive nature is provided with an adequate explosion prevention system or with safety relief vents leading as directly as possible to the outside air and not connecting with any chimney pipe, vent or flue used for any other purpose.
(2) Where non-escape of materials being carried on an enclosed conveyor is essential, an employer shall ensure that safety relief vent outlets on the conveyor are provided with counter-balanced relief valves.
(3) An employer shall ensure that a fan for a pneumatic conveyor is
(a) made of fire resistive material,
(b) secured to a substantial support or foundation,
(c) located, arranged and guarded so as to afford ready and safe access for maintenance, and
(d) provided with remote controls in addition to normal operating controls.
(4) Where flammable materials are passed through the fan of a pneumatic conveyor, an employer shall ensure that the blades and spiders of the fan are made of non-ferrous material and the casing of the fan is lined with non-ferrous material.
(5) An employer shall ensure that intake openings of fans for a pneumatic conveyor are protected with metal screens or gratings.
(6) Where material is fed by hand into a pneumatic conveyor 300 mm in width or larger, an employer shall ensure that precautions are taken to prevent an employee from being drawn into the opening.
261. (1) An employee shall not
(a) stand on the supporting frame of a conveyor while loading or unloading the conveyor or when clearing blockages on the conveyor unless the conveyor is stopped and locked out, or
(b) ride on a conveyor.
(2) An employee shall remove heavy or bulky articles by hand from a moving conveyor at designated stations only.