(225 ILCS 710/30) (from Ch. 96 1/2, par. 4238)
Sec. 30.
Headframe for hoisting rope.
The sheave carrying the
hoisting rope shall be placed upon a headframe so designed as to resist a pull
in the direction of the hoisting engine greater than the breaking stress of the
hoisting rope employed. The headframe shall be of sufficient height to allow
room for a set of automatic safety chairs, and also for a humble hook in
connection with the hoisting rope or some equally practicable device for
releasing the hoisting rope in case of over-winding.
The operator of a mine employing more than 100 people underground shall
install upon the headframe both a rope-releasing device and a set of
automatic chairs to hold the cage, skip, or man car in case the hoisting
rope is broken or released through over-winding. Such safety chairs shall
be placed at such distance below the releasing device as will equal 3 feet
more than the height from the bottom of the cage, skip or man car to the
clevis at its top. Immediately below the sheave a strong stop shall be put
in to prevent the cage, skip or man car from being drawn over the sheave.
The operator of a mine employing more than 100 people underground shall
install in every shaft in which people are hoisted by cage, skip or man car, a
device which shall give a warning signal in the engine room whenever the
cage or skip in ascending reaches a point 100 feet below the collar of the
shaft. This device shall be independent of the usual indicator or any other
device directly connected with the hoisting engine.
Provided, however, that the rope releasing device, safety chairs, and the
warning signal required by the terms of this Section need not be installed
if the hoisting engine is equipped with a device that will automatically
stop the engine if the cage, skip, or man car passes a certain point, and
provided further that such automatic stopping device be kept constantly in
good working order.
(Source: P.A. 87-1133.)
|