German company LASE Industrielle Lasertechnik has launched a new system which aims to prevent the lifting of trucks by cranes due to locked or defective twistlocks.
The system is named LaseTLP (Truck Lifting Prevention) and immediately interrupts crane hoist movements when the laser measurement system detects a lifted container chassis at 10 cm.
The system can be applied to rubber-tyred gantry cranes (RTGs), rail-mounted-gantry cranes (RMGs), Automated RMGs and ship-to-shore (STS) cranes.
Truck trailers can be lifted up by the crane hoist when one or more twistlocks are still locked or not completely loosened, which can cause injury and damages claims.
The system involves two laser scanners mounted on the crane gantry with a vertical scan plan towards the truck lane.
The scanner or scanners track the container and trailer and compare the position of the lifted container and trailer structure.
If both objects move upwards simultaneously, the system generates an alarm signal.
The company said in a statement that heavy rain or snowfall does not interrupt the working of the system and that it can work will different container chassis types.
General manager Lars Ambrosy said that it is the right time to enter the market due to increasing safety requirements and the degree of automation in ports worldwide.
Laurence Jones, risk assesment director of insurer TT Club, said: “Cranes lifting not only a container but also the trailer and truck or the rail wagon on which it sits due to not all the twistlocks being unlocked is a common problem globally.”
“In the last decade there have been a number of systems developed to detect and prevent this type of incident. Sensors mounted on the crane to detect the gap between the container and trailer or wagon is the most common solution. The recent twistlock load sensing technology can also be used to detect if any twistlocks are still locked and then prevent further lifting.”
“LASE is just one of the suppliers with a solution,” he added.