Donati GRL Series, Manual

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USE AND MAINTENANCE MANUAL FOR
JIB CRANE - GRL SERIES
41
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Work carefully and diligently constantly following the manoeuvres and visually
checking the equilibrium of the handled weight
•
Avoid sudden manoeuvres and “small abrupt movements” that are very damaging
for the stability of the load due to the dynamic effects which are generated.
•
Never lift loads with grips which are not barycentric and not balanced or omit to
hang and secure all of the required slinging accessories or fix the load with
temporary or makeshift slings
•
Never leave the load suspended, once a handling operation has been started, it
must be completed as quickly as possible and the load needs to be placed without
crushing the lifting accessories.
fig. 55 fig. 56
5.2.7 Safety devices
Disabling of the crane power must be performing by disabling the line switch/circuit breaker (not included
in the supply) and/or by pressing the “emergency stop” button on the pushbutton panel.
An electric or mechanical interlocking device prevents simultaneous control in both motor rotation
directions, both at slow and fast speed.
The lack of voltage causes an immediate block of all hoist and trolley movements, since the electric motors
are equipped with automatic braking devices.
A safety catch is installed on the lifting hook to prevent accidental unhooking of the slings and/or load.
The lifting, traverse and rotation limit switches limit the maximum vertical and horizontal travel of the load.
They are emergency devices and not suitable as operating stops.
•
The safety devices, when excluded from the DONATI SOLLEVAMENTI
S.r.l. supply must be installed by the customer.
•
It is prohibited to put the jib crane into service and/or affix the CE
marking, shown on the side, before it has been completed in compliance
with the instructions contained in this point
5.3 Activating the jib crane
To start the operating activity of the jib crane follow the instructions below:
1. Visually inspect the conditions of the crane and the structures where it is installed.
2. Perform all of the tests as described in paragraph 5.5
– “Use criteria and precautionary measure”
3.
Activate the power line by putting the general switch in the “ON” or “1” position
4. Check that there are no exposed persons in the hazardous operating areas