Vehicle crane system for transporting an attachment part, in particular a main jib of a vehicle crane

A method for receiving a detachable attachment part onto a transport apparatus of a vehicle crane system, wherein the detachable attachment part comprises a main jib of a vehicle crane and the vehicle crane system further comprises;

• an attachment part-transport unit that is designed to receive the attachment part when detached from the vehicle crane and has the transport apparatus for transporting the attachment part;
• two loading arms pivotably arranged on the transport apparatus, wherein the loading arms each include a free load-bearing end configured to be selectively coupled to the attachment part such that the attachment part can be moved onto the transport apparatus or can be moved down from the transport apparatus to be loaded or unloaded;
• and
• a storage block, wherein the storage block is arranged on the transport apparatus and is designed to support the attachment part in the region of a head end of the attachment part, and wherein the storage block is displaceable in parallel with a longitudinal direction of the transport apparatus;
• said method comprising the steps of:
• providing the attachment part-transport unit in extension of the vehicle crane;
• orienting a longitudinal direction of the main jib with respect to a longitudinal direction of the transport apparatus;
• placing the head end of the main jib on the storage block of the transport apparatus by luffing down the main jib via a luffing cylinder of the main jib;
• decoupling the luffing cylinder from the main jib;
• pivoting two loading arms of the attachment part-transport unit until both loading arms protrude with their free load-bearing ends into a region of a jib portion of the main jib located between the head end and a foot end;
• arranging a holder between the free load-bearing ends of the two loading arms such that the holder extends as far as a basic box of the main jib and through below the basic box of the main jib;
• establishing a detachable connection between the holder and the basic box, wherein the holder engages at least partially around the basic box from an underside;
• pivoting the two loading arms such that the main jib is raised at least on one side via the holder that at least partially engages around the basic box of the main jib from the underside such that a detachable connection between the vehicle crane and the main jib is at least partially relieved;
• disconnecting supply lines between the vehicle crane and the main jib;
• releasing the connection between the main jib and the vehicle crane;
• pivoting the two loading arms in such a manner until the main jib, which is supported via the storage block to be displaceable in parallel with the longitudinal direction of the transport apparatus, is received onto the transport apparatus and is placed on a storage device of the transport apparatus by a combined translational and a limited rotatory loading movement that is effected relative to the transport apparatus and away from the vehicle crane.

A method for connecting a main jib to a vehicle crane, where the main jib includes a basic box located between a head end and a foot end of the main jib, and the main jib is received on a transport apparatus of a vehicle crane system and is supported with the head end on a storage block and is supported with the basic box, and where the vehicle crane system further comprises;

• an attachment part-transport unit that is designed to receive the attachment part detached from the vehicle crane and has the mobile transport apparatus for transporting the attachment part;
• two loading arms pivotably arranged on the transport apparatus, wherein the loading arms include free load-bearing ends configured to be selectively coupled to the attachment part such that the attachment part can be moved onto the transport apparatus or can be moved down from the transport apparatus to be loaded or unloaded;
• and
• wherein the storage block is arranged on the transport apparatus and is designed to support the attachment part in the region of the head end of the attachment part, and wherein the storage block is displaceable in parallel with a longitudinal direction of the transport apparatus;
• said method comprising the steps of:
• providing the attachment part-transport unit with the received attachment part in the region of the vehicle crane such that the main jib with its foot end at the front is oriented with a coupling point of the vehicle crane corresponding to the foot end thereof;
• pivoting the two loading arms of the attachment part-transport unit in such a manner until the main jib is raised from a storage device of the transport apparatus via a holder that is arranged between the free load-bearing ends of the loading arms and is detachably connected to the basic box by engaging around the basic box from an underside, and wherein the main jib is moved with its foot end at the front by a combined translational and a limited rotatory unloading movement, effected on the basis of pivoting movements of the loading arms relative to the transport apparatus, away from the storage device at least partially towards the vehicle crane and wherein the storage block is displaced in parallel with the longitudinal direction of the transport apparatus;
• orienting, if required the foot end of the main jib with respect to a corresponding coupling point of the vehicle crane by synchronous and/or mutually independent pivoting movements of the loading arms;
• connecting the attachment part to the vehicle crane;
• pivoting the two loading arms in such a manner until the holder that is detachably connected to the basic box of the main jib is relieved;
• detaching the holder from the free load-bearing ends of the loading arms;
• connecting supply lines between the vehicle crane and the main jib;
• and
• connecting a luffing cylinder of the vehicle crane to the main jib beforehand or subsequently.