Custom Search
|
|
|
||
 2.9.2 In-Car Inspection
2.9.2.1 Drive. If the screw machine is mounted on the car and accessible for inspection and
maintenance from an access panel in the side or rear car wall, check the access panel to verify
that it is normally kept closed and locked and that the key is available only to inspectors,
maintenance personnel and repair personnel. Insure that the machine cannot be operated when
the access panel is open. If the screw machine is equipped with a safety nut below the drive nut,
carefully measure the space (distance) between the drive nut and the safety nut. Compare this
space with the space when the drive nut and safety nut were originally installed by referring to
the Safety Nut Spacing Data Tag attached to the screw machine. A reduction in this space is an
indication of wear of the drive nut. Any reduction of the separation space of more than one
thirty-second (1/32) inch should be reported. Examine any belts or chains in the screw machine
drive for proper tension, wear and damage; including cuts, breaks, or separation. Check
tension devices, if provided, to verify that they are in proper adjustment to detect slack or broken
belts or chains. Check all machine fastening bolts to determine that none have become loose or
are missing. Visually inspect the electrical service connection to the motor to verify there is not
evidence of chafing, damage, or looseness. Inspect the screw column to verify that it is
lubricated in accordance with manufacturer's recommendations. After temporarily making the
contact on the access panel inoperative so that the screw machine can be operated with the access
panel open, operate the elevator car in each direction while observing the brake functions and the
rotation of the machine. Promptly upon interruption of power to the drive machine, stop the car.
2.9.2.2 Control Equipment. If the controller is located on the car and accessible for inspection
and maintenance from an access panel in the side or rear car wall, proceed with the inspection as
described previously in this chapter.
2.9.2.3 Hoistway Equipment. If the particular design and installation permits the inspection of
all mechanical and electrical equipment from within the car, the contact for the access panel
should be made inoperative temporarily so that the car can be moved with the access panel open.
Start with the car at the top of the hoistway and move the car in the down direction in about two
(2) foot increments, stopping to inspect all hoistway equipment at each location. Included in the
mechanical and electrical equipment which should be inspected are: guide rails, guide rail
fastenings; screw column supports, mounting brackets and guides, traveling cable, etc.
2-37
|
 
|
|
|
||
