Guarding Belt Conveyors - PowerPoint PPT Presentation

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Guarding Belt Conveyors

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Guarding Belt Conveyors By: Belt Conveyor Guarding (www.conveyorguarding.com) (866) 300-6668 – PowerPoint PPT presentation

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Title: Guarding Belt Conveyors


1
Guarding Belt Conveyors
By Belt Conveyor Guarding (www.conveyorguarding.c
om) (866) 300-6668
2
Guarding Belt Conveyors
  • 1. Setting The Guarding Policy
  • 2. Things to Consider When Building a Guard or
    Guarding an Area
  • 3. Common Areas Requiring Guarding
  • 4. Training

3
Conveyor Belts Move Faster Than You!
4
  • What can happen in one second?
  • A human eye can only blink twice in one second.
  • At rest the human heart beats once per second.

5
  • For the average person the time needed to react
    to an unexpected sensation is about one second.

6
  • Consider the following
  • A typical conveyor belt travels in the range of
    300 feet per minute.
  • This means the belt is moving at 5 feet per
    second.
  • That is one revolution of an 18 pulley.

7
  • That conveyor belt moving at 300 feet per minute
    or 5 feet per second will draw
  • Your tool
  • Your loose clothing
  • Your hand
  • Your arm
  • 5 feet into the pinch point before you can
    react!!!

8
1. Setting The Guarding Policy
9
Company Guarding Policy
  • Developed through Owner/Management and
    Worker/Joint Health and Safety Committee.
  • These groups interpret the current MSHA Guarding
    Standards to establish their guarding policy.
  • Using Standards such as the ANSI B11-Series
    Safety Standards for Machine Tools, for
    guidelines.
  • From this a guarding best practices can be
    developed.

10
ANSI B11-Series Safety Standards for Machine
Tools.(American National Standards Association)
  • It was developed to determine guard mounting
    distances based on the maximum opening sizes in
    the guarding.
  • The standard ensures that any body part which can
    fit through the mesh wont be able to contact the
    pinch point inside.

11
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12
What is the Safe Distance From a Pinch Point?
13
  • What and where is the in-running pinch point?

PINCH POINT
DIRECTION OF BELT TRAVEL
14
  • The distance that you are required to guard
    around a pinch point.

36
PINCH POINT
DIRECTION OF BELT TRAVEL
36
36
36
15
Guard Mounting Distances Proper Mesh Sizing
16
Safety Gauges
17
Distance from Point of Operation (in) Maximum Width of Opening (in)
0 to 1/2 Less than 1/4
1/2 to 2 1/2 1/4
2 1/2 to 3 1/2 3/8
3 1/2 to 6 1/2 5/8
6 1/2 to 17 1/2 1 1/4
17 1/2 to 36 1 7/8
Over 36 5
18
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19
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20
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21
2. Things to Consider When Building a Guard or
Guarding an Area
22
Ergonomics
  • A well designed guard should not weigh more than
    50 pounds
  • It should not require more than one person to
    remove or install it.

23
Simplicity
  • Guards should fit into place easily with minimal
    thought or effort.

24
Fastening System
  • Consider What Type of Fastening System Will Work
    Best For the Application.

25
Wedge Clamp
  • Wedge clamp is never removed so your guard always
    has a place to go back on too.

Fully Opened Position
Partially Opened Position
Closed Position
26
Wedge Clamp
  • When a tool is required to remove the guard.
  • Cable Tie requires a tool to remove it. (side
    cutters)

27
Maintenance
  • Do not design a guard that requires constant
    maintenance.

28
Recognition
  • Is the Guard recognizable as a Guard?
  • Paint your guards a color which will standout
    from your equipment.
  • Standardize a color which means Danger
  • Safety Yellow is a common color.

29
Adjustment
  • Can adjustments be made to guarded components
    without
  • 1) the loss of protection?
  • 2) the modification of the
    guard?

30
Inspection
  • Can guarded components be inspected without
    removing the guard?

31
Create A Hazard
  • Does the design, material construction of the
    guard create a hazard?
  • Free of
  • Burrs
  • Sharp Edges
  • Pinch Points

32
Standardization
  • It is easier to install new guarding if you are
    using a common standard.
  • Also, it is easier to educate new and existing
    workers on safe guarding practices.

33
3. Common Areas Requiring Guarding
34
Tail Pulley
35
Tail Pulley
36
Receiving Hopper/Skirt Boards
37
Receiving Hopper/Skirt Boards
38
Receiving Hopper/Skirt Boards
39
Receiving Hopper/Skirt Boards
40
Gravity Take Up Pulleys
41
Gravity Take Up Pulleys
42
Gravity Take Up Counter Weight Enclosures
43
Gravity Take Up Counter Weight Enclosures
44
Head Pulleys/Drive Pulleys/Snub Pulleys
45
Return Rollers - within 7 ft from the ground or
walking and working surfaces.
  • Example If a return roller is 6 feet above a
    walkway , and the area is 50 feet above the
    ground, it needs to be guarded.

46
Return Rollers - within 7 ft from the ground or
walking and working surfaces.
47
Return Rollers - within 7 ft from the ground or
walking and working surfaces.
48
Return Rollers - above 7 feet from the ground
49
Return Rollers - above 8 ft from the ground
50
Return Rollers - above 7 ft from the ground
51
Return Rollers on walkways
52
Return Rollers on walkways
53
Uprights or Obstructions which could trap
54
Uprights or Obstructions which could trap
55
V-Belts
56
V-Belts
57
V-Belts
58
Other Circumstances to Consider
59
Conveyor Bends
36
36
36
36
60
Tripper Conveyors
61
Radial Drives on Portable Stacks
62
Radial Drives on Portable Stacks
63
Self Closing Gate
  • Used on top of ladder exits so person doesnt
    back or walk into the ladder opening.
  • Gate can also be used at the bottom of stairs to
    limit access.

64
Self Closing Gate
65
Self Closing Gate
66
Self Closing Gate
67
4. Training
68
  • Training should involve instruction and hands-on
    training.
  • Specific training is a crucial part of any
    effective guarding system.

69
3 Questions to Ask Your Workers
  • 1. How do the guards provide protection for the
    specific pinch point?
  • 2. How and under what circumstances, can guards
    be safely removed and when must the guards be
    replaced?
  • 3. What do you do if a guard is damaged or
    missing?

70
Conclusion
  1. Keep it simple !!!
  2. Standardize your guarding.
  3. Properly train your workers.

71
Thank You!
  • By Belt Conveyor Guarding
  • (www.conveyorguarding.com)
  • (866) 300-6668
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