User`s manual

26
PRE ERECTION VERIFICATION
• Check that no damage has occurred to the various parts of the machine during transportation. Pay particular attention to the
rope, push-button control panel and its cable, limit switches, and electric connection cables.
• Check that the voltage indicated on the hoists data plate and on those on the motors corresponds to the rate power available.
• Check if the motor and brake terminal boards are correctly connected in accordance with the indications given on the
relevant data plates.
• Check that the ropes, with regard to their securing points, are in the right place. If not, put them right (clamps, wedges and
pulleys).
• Check that the reduction units are filled with oil to the right level. Hoist reduction units are normally supplied with oil.
• Check that all required components are available.
• Prior to assembly, check that all components are whole and undamaged.
• Check that clearances, overall dimensions etc correspond to the contract data.
• Check that runway beams and rails are installed in accordance with the appropriate standard.
• Check length, capacity and suitability of the electrical supply system, paying particular attention to voltage range, conductors
cross section and rating of mains switch.
• Check availability and suitability of the equipment required to assemble the machine and install same, prior to the
commencement of assembly.
• Ensure that there is adequate space for maneuvering the machine into position.
• Ensure that the orientation of the machine corresponds to the appropriate drawings.
• Make sure the available personnel have adequate skill and experience
• When possible, carry out tests on assembled machine prior to installation.
• Check all slinging points and ensure that the machine is secure and evenly balanced, the method depending on the
availability and type of rigging equipment.
ASSEMBLY OF HOIST
Remove the hoist from its packaging without damaging the ropes and the various electric components.
- A fixed hoist is secured mechanically to the base structure using high-strength bolts which are very slightly
smaller than the diameter of the holes on the frame. If necessary insert spacers to ensure perfect planarity.
- A monorail hoist requires more careful erection, usually the trolley can be inserted front-first on to the girder.
If this is not possible, disassemble the wheel-bearing flanges loosening the TIE RODS which hold the hoist. Upon re-assembly check
that the nuts are well tightened to ensure a good sliding movement the wheel/web axial gap should usually be around 2-4 mm.
The wheels are shaped to work correctly on both level (IPE) and slanted (INP - IPS) railways.
When welded girders (double T shaped or box-type) remove all unevenness and the remnants of soldering.
Any girder joints must be leveled and smoothed without hollows or interruptions.
The girders must also be straight (unless the trolley is designed for working on curves) and the supports must not be on different
levels
- Before lifting the hoist make sure the fastenings are placed so as not to damage parts and that the machine is well-balanced so
as to avoid the supporting ropes slipping out and the hoist falling.
- The bi-rail electric hoist is laid on its rails which are already precisely gauged, perfectly parallel and strictly horizontal.
The wheel thread, measured on the bottom of its rims must be 5-10 mm wider than the rail.
- Before setting the machine to work, check the space available in relation to the size of the hoist to ensure
there is no interference with fixed structures.
- Install suitable, sturdy fixed fingers or saddles at the ends of the horizontal paths to activate the limit switches.
- Install a sturdy end stop onto the sliding girder at the same height as the buffer to avoid overshooting or prevent the hoist from
falling.
- Make sure the limit switches for horizontal movements stop the trolley, at maximum speed, a few centimeters before the buffer
hits the stop plate.
If the monorail hoist on crane is supplied with an electric power supply line.
- Arrange the brackets 1.5 meters from each other, securing them to the upper flanges of the girder or similar with the relative
clips.
- Arrange the loops in the saddles, insert the whole trolleys into the raceway, and secure the terminal boards to the feeding point.
Insert the driving bracket on the hoist into the appropriate trolley and connect up the machine electrically.
All the setting operations for the limit switches and the resetting of safety distances must be carried out by specialized
electricians with the authorization by respective section heads.