PROFILE
TECHNICAL CONCEPT
MODEL
ACCESSORIES
PROJECTS
Technical concept
Components
Roof trolley
The roof trolley consists of steel chassis, structure and frame, supporting the rotating fixation of the jibs, the traversing wheels, and all accessories like electric cable winder, the main control panel box, etc.
The drum hoist and safeties are non accessible by non authorized personnel.
Traversing equipment
The machines are moving horizontally by three or four wheels, the two front wheels are motorized. The roof trolley can be ‘’ parapet mounted’’, running on two vertical steel track, in this case , the two wheels located on the low steel track are motorized.
The motorized wheels are mounted on a strong welded pivoting cage, supporting four wheel guide, the gear motor, and the steel traversing wheel itself.
The motor is equipped with a disc brake which securely hold the trolley in any position along the steel rail. Each wheel is mounted with four strong claws that prevent the trolley from lifting from the track.
The trackless machine is equipped with the same N° of wheels, fixed to the roof trolley with a strong axle, with ball bearing, and nut into a hub. The wheels are steel made, and recovered by polyurethane tyre. The powered wheels are the same than described above. In this case, the machine will be guided along the parapet by a steel L profile 10 x 10 cm or a concrete guide 10 x 10 cm or by two castor wheels on the parapet.
The pivoting and sliding rear wheels are ensuring to the machine to be safe even into the narrow curve.
The horizontal movement is stopped by two electric detectors installed on the extremities of the run way.
Drum hoist
The Drum is constructed with a heavy steel tube, supported by a transversal shaft, crossing the drum. The shaft is welded into each end on two heavy steel closing the extremity of the drum.
The drum is supported on the shaft by ball bearing.
The grooved drum winds the four wire rope at the same speed; they are guided with a spooling system synchronized by a chain to the drum ensuring a perfect and perpendicular winding of these.
The diameter of the drum is calculated following the height of the building. The main sizes are 300 mm; 600 mm; 900 mm.
The safeties mounted on the drum are: over speed detector, coupled to an electric switch, which switches off immediately the operation when activated, and with a centrifugal device, which will activate a hydraulic brake, immobilizing the drum immediately.
In this case, this failure will be corrected by an authorized technician.
In case of slack rope, the spooling mechanism is equipped with four slack rope device, coupled to four electric switches, stopping the movement.
Luffing jib
The jib support is made by a strong steel tube, supporting two special brackets at each extremity, where are connected the two jib by four special shaft, locked and secured.
The jib can be removed for transport reason.
This structure is connected to the roof trolley by a special bearing system.
The jib support is moved by an electric spindle bar or by an hydraulic jack, depending of the length of the jib or of the weight of the cradle.
The wire rope is guided by pulleys from the machine housing to the extremity of the jib.
The jib movement is limited by two electric switches, and secured by two auxiliary switches.
The suspension wire rope run from the aluminum cradle to, over the jib head pulley, and then through the jib to the roof trolley housing, and then are wound on the grooved drum.
Cradle
The cradle, almost made in aluminum is composed by two aluminum end stirrup, or two free way stirrups, depending of the requirement, one peripherical aluminum structure, one anti-sliding floor, totally closed, with four holes to evacuate the rain water.
The height of the guard rail in front of the facade is 1.10 m.
The height of the rear guard rail is 1.30 m.
The internal width is 0.55 m
The outside width is 0.60 m
The cradle is completely closed on the vertical walls by aluminum sheet 3/10, a special stair is previous for access into the cradle.
The cradle frame incorporate anchoring points for safety belt.
The cradle is equipped with facade roller, and rubber buffer are attached to front and lateral sides to prevent damage to the building.
The four suspension ropes are anchored to the cradle by two special devices coupled to two electric switches, preventing overloading action.
The four wire rope are mounted on calibrated spring, two of them are supporting 60 % of the weight (lifting wire rope), and the other two, are supporting 40 % of the weight (safety wire rope).
The cradle can be guided along the facade by cradle restraint system, composed either by roller installed into a continuous guide on the facade, or by punctual anchorage, bolted on the facade. In the two case, the cradle or the wire rope, are guided on the entire height of the facade.
The cradle is equipped with a low trip bar, to avoid to damage the opening windows during the descent or to stop the machine in low position or on its parking position.
Suspension ropes
The four steel galvanized ropes are selected following the norms.
Their diameter is between 6mm to 12mm, depending of the suspended weight.
Composition: 6 x 19 + 1 seal, tensile strength: 1850 per mm² or more following diameter
The core of each rope consists of either, fiber, or fiber and copper wire for the transfer of the electrical control signal from the cradle to the roof trolley.
The copper conductor is used only for height bigger than 40 m; the electric cable is used for the small building.
Electrical system
AESA electrical system operate on worldwide electrical current rating, 220 V tri; 380 V tri, 460 V tri; 230 V, 50 HZ or 60 HZ
It is composed by the relays, contactors, safety switches, electronic devices, phase detector, keys, dead man buttons, etc...
The brand name is Telemecanique or Schneider, due to its worldwide disponibility.
The user of the machine can operate only one function at once, by a movement selector.
Operation of the machine from the cradle is achieved by turning a key located on the main control panel box on the roof trolley.
Machine is also equipped of a main interrupter, on the roof trolley avoiding use by non authorized person.
Average Rated power
Rated power traversing motor: 2 x 0.37 Kw
Rated power slewing motor: 0.55 Kw
Rated power lifting motor: 1.50 Kw
Rated power spreader bar: 0.18 Kw
Rated power luffing motor: 0.37 Kw
Rated power telescope: 0.37 Kw
Electric Components
The main interrupter locked by key
The power outlet sockets located on the roof every 35 m or 20 m
The connecting cable on spring reeler Lg : 20 m
The key selector CRADLE – 0 – Trolley
The emergency stop button
The transformer 380 / 220 V / 24 V
The phase detector
The contactors
The auxiliary contactors
The thermical relays
The main relay R 1
The electronic plate for copper conductors only
The movement selector
The "deadman" button (execution, power, validation guide)
The indicator lamp, (Power on, inversed phase, overload, low pressure brake, emergency technical service)
It is possible to control the cradle from the cradle; a second control panel box is available in the basket.
Electric motors, ABB or Bonfiglioli, and the Control panel boxes are at least IP 55
