Safety equipment
Automatic stop at top and bottom landings
At top and bottom landings, limit cams are mounted on the
mast. These cams activate the limit switches, which auto-
matically stop the hoist. The functions for the Up and Down
limit switches are backed up by a final limit switch with its own
cams on the mast at top and bottom landings. This switch
provides interruption of the three-phase power supply and stops
the hoist should the normal limit switch fail.
Below the bottom landing level, close to the hoist mast, buffer
springs are located for the hoist car. The buffer is designed to
stop a descending hoist beyond its normal limit of travel.
Safety details on machinery plate
On the machinery and safety device plates, heels keep the pinion
of the machinery and safety device constantly engaged with the
rack on the hoist mast, in case a counter roller or a guide roller
on the cage comes off.
Safety hooks
To prevent the hoist from climbing off the mast during erection
or dismantling, or to prevent the pinions from disengaging the
rack in case a counter roller or guide roller comes off, safety
hooks are mounted on the drive unit and on the car. The safety
hooks are placed underneath the drive pinion of the machinery,
preventing the hoist from falling off the mast should the drive
pinion run off the top rack.
ALIMAK 34754 - 1/01
Normal upper &
lower limit switch
Final limit
switch up
& down
Heels
A
16
Содержание Scando 650 DOL
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