Patent ID: 8640896

Claim:
A method for adjusting the angle of a jib system ( 1 ) of a crane, comprising: firstly providing two jib units ( 3 , 4 ) of the jib system ( 1 ), which can be variably arranged with respect to their longitudinal axes ( 13 , 13 a ) in an angle position in relation to one another, secondly arranging connecting links ( 8 , 8 a ; 29 , 29 a ) attached to the jib units ( 3 , 4 ) in a starting angle position in which the longitudinal axes ( 13 , 13 a ) of the jib units ( 3 , 4 ) are parallel, wherein the step of arranging comprises aligning starting openings ( 10 ), defined in respective ones of the connecting links, with one another pairwise to permit a connection element ( 20 ; 30 ) to be inserted into the aligned starting openings ( 10 ) connecting the jib unit ( 3 , 4 ), and wherein the step of arranging further comprises aligning target openings ( 11 , 12 ) defined in respective ones of the connecting links ( 8 , 8 a ; 29 , 29 a ) with one another pairwise to permit the connecting element ( 20 ; 30 ) to be inserted into one of the aligned pairs of connecting links ( 8 , 8 a ; 29 , 29 a ) connecting the jib units ( 3 , 4 ), and such that the aligned starting openings ( 10 ) are connected with the connecting element ( 20 ; 30 ), thirdly relieving the connecting element ( 20 ; 30 ) connecting the aligned starting openings ( 10 ) by lifting or supporting the jib unit ( 3 ), fourthly removing said connecting element ( 20 ; 30 ) from the aligned starting openings ( 10 ), fifthly connecting a pair of the aligned target openings ( 11 ; 12 ) with said connecting element ( 20 ; 30 ), and sixthly arranging the jib units ( 3 , 4 ) in a target angle position which is different from the starting angle position.