Cart Safety Review

Cart Safety Review

Hazards and mitigating efforts

EARLY DRAFT

• Rotational Motion

1. Possibility that someone could be hit by system while it is under remote control
   1. There are drive power kill switches located next to the two access points for the alcove. If the buttons are pressed the AC power is cut to the drive system. This power can only be restored by resetting the switch and pressing a safety restore button on the cart.
   2. Then system moves slowly so you can easily walk out of the way.
   3. The weight of an average adult pushing against the end of the carriage will stop the cart through either a motor stall or it will shear the chain.
   4. Under normal operation the cart would only move when the hall was locked up.
   5. During calibration of the drive system someone will be standing next to the cart.

• Moving the carriage

1. The carriage is manually positioned and requires more than one person to move it.
   1. After evaluation we may choose to use a chain-fall to move it slowly and with a reduced chance of back strain.
   2. You can push the carriage past center and the cart could tip over.
      1. There is an out-rig wheel to prevent this, however it is only on one side.
      2. The out-rig wheel can be moved to the overhanging side.

• Moving the cart

1. Moving from the platform position to the alcove position could cause strain.
   1. Three people are necessary to push the cart.
   2. The cart does not transition floor levels.
      1. Steel has been added to make the two positions all on the same level
2. Moving the cart could tip the cart over.
   1. The carriage must be in the rolling position and locked before motion starts. This places some of the load on the outrigger making it more stable.

• Drive System Hazards

1. By its nature the drive system can pinch or crush fingers if they are stuck into the system while it is energized.
   1. There will be a safety cage surrounding the drive system.
   2. All work performed on the drive system while the care is removed must be in a power off condition.
2. The drive can start and stop with no visible operator.
   1. Drive power kill switches are provided

EARLY DRAFT