Supporting device having infinitely adjustable jibs

Claim 1

An adjustable supporting device for securing a jib to a support column, said supporting device comprising a jib connecting device having a clamping chuck with connecting means for connecting said jib to said clamping chuck and a tightening wedge to facilitate supporting engagement of said connecting device and said column; said clamping chuck surrounding said column on three sides thereof for laterally placing said jib on said column and removing said jib therefrom, wherein said clamping chuck comprises: a supporting wall, to which said jib is removably connected, extending over the width of a first side of said column, said supporting wall having a guide web which forms part of a centering means for said clamping chuck along said column; a clamping plate connected to said supporting wall and extending over the width of a second side of said column adjacent to said first side of said column; a U-shaped tightening wedge cage having a first side wall connected to said clamping plate and a second side wall which limits a passage opening in front of a fourth side portion of said column, which passage opening extends to said guide web on said supporting wall, wherein the opening of said U-shaped cage faces a third side of said column, opposite the first side of said column, for receiving said tightening wedge which is supported between said clamping chuck and a base of said cage, converging in the load direction of said jib.