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Mobile self-erecting tower crane

The development of a mobile self-erecting tower crane, which excels with high load capabilities and a high performance all-terrain base. The crane will be equipped with advanced control systems for automation and an anti-sway control system.

The objective of the project is to develop and test a prototype of a self-erecting mobile tower-crane to enlarge the ARCOMET series of cranes on the European market and beyond. In the past ARCOMET has developed self-erecting tower-cranes for the building industry. These were mounted and remained stationary on the building site for a minimum of three months. Currently, the tendency is that building enterprises want a crane at the time it is necessary. For example, that may hire a crane for 5 hours. To develop such a crane, it is necessary to combine the knowledge of the development of a self-erecting crane and a mobile (hydraulic) crane. By putting together the know-how and development efforts of each partner, the time before it can be introduced to the market will be minimised. ARCOMET will develop the construction of the crane. The kinematics needs to be redesigned in order to prevent problems and minimise human intervention during mounting/ dismounting. Although the crane will be mounted/ dismounted very frequently (up to 3 or 4 times a day), the system must be robust under all conditions during the lifetime of the product. New principles for guiding and locking the different parts during mounting/ dismounting and during normal operation need to be developed and tested. The weight needs to be minimised. The complete installation needs to be transported on one truck (maximum 5 axles with 12 tons per axle) and considerable ballast must also be carried. This ballast should in fact be as large as possible, otherwise the turning circle will have to be increased, which is contradictory to the small footprint of the construction. For the aspects of kinematics, selecting and testing of components and weight optimisation, ARCOMET will cooperate with WTCM. During this project, ARCOMET will develop, in assistance of the UNIVERSITY OF LEUVEN, an anti-sway system to minimise - or prevent completely in certain circumstances - the oscillating movement of the load during operation (jib trolleying, slewing and hoisting). For this reason, a method for measuring the desired and actual position of the load at any time needs to be developed. If implementation and tests are successful, the principle can be extrapolated to other tower cranes. Cranes with an anti-sway control system will be more efficient and safer than the existing cranes without this feature. TADANO-FAUN will develop a new high-performance all-terrain chassis for the crane. It is a challenge to develop a chassis that will be subject to extremely high forces while its total height must be limited. The total height of a dismounted tower-crane (and any vehicle for transport on normal roads) should be limited to 4 metres. Comparable hydraulic cranes have their slewing ring at a height of 1.75 to 2 metres. For the tower-crane chassis, one is aiming at a height of about 1.1 to 1.2 metres for the slewing ring. High strength materials will be used, with possibly some impact on the production process (special welding technology). Of course, weight must also be minimised. SAMPIERANA will develop rough terrain crawler undercarriages to meet the needs of the present-day building industries. The undercarriage must be able to drive with max load. Further, the undercarriage must have a simple method to dismantle the crawlers before transporting the crane onto a trailer (low bed loader). MTC has the task of making the different systems work together in a reliable and safe way. The mobile tower-crane will be equipped with numerous drives and sensors to control all movements and detect the actual situation in real-time. The anti-sway feature - which requires certain performances of the control and drive systems - needs to be implemented as well. Some cranes functions need to be accessible form the truck cabin. All functions need to be controlled from the crane-console and from a wireless remote control system. Safety and control comfort of the operator are of the highest importance. Keywords: mobile towercrane, self-erecting crane, anti sway system.
Acronym: 
MSETC
Project ID: 
2 797
Start date: 
01-11-2001
Project Duration: 
30months
Project costs: 
1 760 000.00€
Technological Area: 
Construction Equipment
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.