|
Each terminal is built from a number of modules that are common to all aerial lifts (1-2) for the coupling, uncoupling and conveying of carriers, plus additional specialized modules for each individual type of lift. This modular approach enables Poma to manufacture systems in advance and provide a rapid response to the changing seasonal needs of the operators. The number of spare parts has also been reduced, minimising the stock that need to be held by the manufacturer and the operators. |
| The fixed or mobile drive system (4) and the return lorry (5) are independent of the coupling, uncoupling and conveying rails. In mobile terminals, the drive bullwheel or the return bullwheel moves between the fixed rails. As a result, the associated framework is simpler to manufacture and assemble. The terminal (3) is supported by two reinforced concrete pillars. The rear attachment point also takes up the tension in the cable. |
| The centrally mounted drive system (10) and the lateral tyre beams can be accessed from a flat rectangular catwalk, free of all obstructions. Operator safety is ensured by removable guard rails and an emergency stop lifeline (6). The sheaves (7), rail and conveyance safety mechanisms (8) and the drive wheel brake (9) can all be accessed from a lower landing beneath the terminal. A manually operated travelling crane with a capacity of 4400 daN is provided in drive terminals, together with lighting and electrical power sockets. |
| The drive unit can be installed overhead or underground. The drive machinery (11-12) features : PK planetary gearbox easily dismantled without releasing the cable tension, braking systems, D.C. motor and backup diesel engine, electric control equipment with the latest generation safety PLC. The drive wheel mounting mechanism decouples the motor torque from the cable tension in order to eliminate the risk of metal fatigue due to alternating forces on the drive. An hydraulic system (13-14) which permanently tensions the cable is built into the structure. |
| The coupling /uncoupling rails (15) have a transversal profile allowing the contact point of the gripšs depression roller to always be centered. |
|
• Number of launching tyres : |
| Carriers are driven through the terminal by tyres (16-17). |
|
Automatically controlled carrier conveyance system (19). A motorized timing system (one or two per terminal or installation) ensures that the carriers retain their correct position on the cable loop (20). Electronically controlled grip spring gorce (21). |
|
The length varies as a function
of operational speed.
The width varies as a function of the line gauge. |
| Multiple combinations of motor and tensioning systems : | |
| Mobile drive and tensioning terminal |
Fixed return terminal
|
| Mobile drive and tensioning terminal |
Moveable return terminal
|
| Fixed drive terminal |
Mobile return and tensioning
terminal
|