The telescopic crane

Telescopic cranes are designed both as slewing cranes and as suspension crane systems. A telescopic crane offers the advantage of working past obstacles such as walls, shelves, other machines or traffic areas. The arm consists of two parts. When pushed together, the boom can be moved past the obstacles and then extended again. The length of the telescope, whether mounted on a boom or a crane bridge, can be up to 3m.
The telescope mechanism ensures that the telescope is only extended when the load wants to leave the area of the fixed jib or bridge. When retracting, the telescope is first retracted again before the load is moved into the fixed crane area. Only with this special mechanism are collisions of the telescope with buildings or vehicles impossible.
As a slewing crane variant, the crane can be turned up to 270°.
This picture shows a telescopic slewing crane which is used to prepare pallets for order picking in confined spaces.

In a narrow passageway, nested pallet stacks are deposited. The individual pallets are then picked up, turned over if necessary and deposited at the point of use. There is space for a slewing crane with 2m reach in the area of the pallet pick-up. In the area of use, however, a reach of 3m is required. A telescopic slewing crane is particularly suitable for this application. Its movement is controlled by the telescopic mechanism in such a way that when picking up the pallets, it is impossible to hit the wall. When moving into the application area, the crane’s undercarriage hits the end of the jib, unlocks the telescope and reaches the desired position without effort. When moving back to the pallet stack, the telescope first retracts, locks and releases the movement of the trolley.

Alternatively, a jib crane could be used in this application. However, due to the space available, the operator of a jib would always have to make sure that the elbow joint bends in the appropriate direction. This is not necessary with the telescopic boom; the crane follows the intuitive movement of the operator without the possibility of a collision.

The crane system shown in the picture is equipped with two telescopic bridges, which pick up material in the area of the warehouse and forklift traffic and then feed it to the production.

In the area in front of the rack, containers with different materials are removed from the rack with forklifts and made available. Due to the height of the shelf and forklifts, collisions would occur with a permanently installed crane system. As a solution, the two crane bridges were equipped with telescopes which reach the area of material provision, pick up the material and then leave this area again and clear the driveway.

Telescopic crane systems and slewing cranes allow access to working areas that cannot be reached by conventional cranes. They are therefore always tailor-made and adapted to the intended use and the environment. This effort is worthwhile, as work flow and productivity are improved compared to the use of standard cranes.

Technical data:
Length of the telescope: 3m with 6m reach
Payload: max. 500 kg