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8.1 STEEL ROPE
Use only new ropes, with a manufacturer's certifi cate of conformity
attesting their satisfaction of the following specifi cations and of
standard UNI EN 12385-4. These are minimum specifi cations:
ropes with better specifi cations may be used, with the exclusion
of the OD, which must always be 6 mm.
External diameter :
Type :
Direction of lay :
Strand strength :
Preformed:
Minimum breaking strain :
Length :
Surface treatment :
The IMER reference code is given in the spare parts table.
8.1.1 REPLACING THE ROPE (Fig. 4)
The rope must be replaced by a qualified service technician.
The replacement kit (cod.3233148) comes complete with the
parts and instructions
Remove the hook (2, fig. 1) and take off the counterweight (9,
fig. 1).
To avoid exerting excessive force on the rope attachment point, the
drum is fitted with a device which ensures that two turns of rope
are always left on even when the rope is completely unwound.
The new rope must be mounted this way.
Completely unwind the rope. Remove it from inside the drum
through the hole and slot.
After passing the new rope from the counterweight and the ring of
the lever, fix the stand-off with one of the terminals "U" provided
(Fig 4.4).
Insert the new rope in the hole and thread it through the slot in
the drum tube. Tighten the clamp at the end, leaving about 1 cm
of rope free (fig. 4.1), and pull the rope until the clamp comes into
contact with the inner wall of the drum.
Wind on two complete turns while keeping the rope in contact
with the drum (fig. 4.2).
On the second turn pass the rope under the hook located inside
the slot in the drum (fig. 4.3).
Tension the rope to ensure good contact with the drum surface.
Wind on the rope in adjacent turns, one layer at a time.
Check that the UP limit switch operates when the counterweight
touches the lever. Run the load test described in paragraph 5 and
note down in Table 2 the fact that the rope has been changed.
Fig. 4.1
IMER INTERNATIONAL S.p.A.
G 500
6 mm
133 wires anti-spin
CDX
1960 N/mm2
Yes
24.53 kN
43 m
galvanised and greased
Fig. 4.2
Fig. 4.3
-
-
13
8.1.2 PERIODIC CHECKS
- Visually inspect the condition of the rope daily and
whenever it is subjected to abnormal strain (twisting, bending,
kinks or abrasion).
Replace the rope when defective (Fig. 14).
- Daily and before using the elevator control the proper
counterweight to the arrest of the top spot and must not be
stopped due to deformation or wear of the lever of the limit
switch.
Every three months inspect the entire rope carefully and in
particular the ends. Note down the results in the chart (Table 2)
which must be kept by the site foreman.
- Replace the rope at least once a year.
8.2 HOOK
When using the hook, make sure the load is on its vertical axis.
Misaligned loads can reduce the hook's load rating.
The hook does not require maintenance. Check it from time to
time for deformation and breakage, and replace it if necessary.
Make sure it has its safety tab, if not replace it.
Only use a new hook to replace an old one, with a manufacturer's
certifi cate attesting its conformity with the folllowing specifi cations:
- load rating: minimum 800 kg;
- fi nish: painted or galvanised.
8.3 ADJUSTING THE MOTOR BRAKE (Fig. 5)
The brake is of the no-power engagement type.
If its braking power is reduced a qualifi ed technician must check
the device and adjust it.
Warning!! Before servicing the brake make sure that the
winch is not loaded and that the brake's power supply is
disconnected. The motor must be cold.
8.3.1. Adjusting the braking force. Remove cap 5 from fan cover 1.
Increasing the braking force: turn the locknut 6 CCW gradually and
check that the brake disengages when lowering.
Reducing the braking force: turn locknut 6 CW. 8.3.2. Adjusting
the air gap. if the brake jams or wears, you must adjust the airgap
as follows. Remove fan cover 1 and extract fan 2. Slacken off
the three allen bolts 3.
Brake jammed: turn collar 4 CW to increase the airgap 7 and re-
lease the brake; check the gap (0.6-0.8 mm).
Brake worn: turn collar 4 CCW to reduce the airgap; check the gap
(0.6-0.8 mm). Fully tighten down the three allen bolts 3, and rein-
stall the fan and fan cover. To check the braking performance, run
a few loaded tests after having adjusted the airgap.
Fig.4.4
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