Suspended freight supervisory camera being attached crane truck

摘要

PURPOSE: To automatically carry out the extension/contraction operation of an extensible boom, when position change of a hoisted load monitoring camera is performed between the using position in the crane work and an accommodation position in the traveling of a vehicle. ;CONSTITUTION: As for a truck crane equipped with a hoisted load monitoring camera 6 at the top edge part 22 of an extensible arm 4 mounted on a vehicle, a support 7 on which the hoisted load monitoring camera 6 is installed is pivotally installed at the top edge part 22 of a top end boom 21 by a shaft 70 so as to be swung in parallel to the turning-up/down locus plane of the extensible boom 4, and the hoisted load monitoring camera 6 is allowed to keep a downward attitude by its dead weight over all the turning-up/down enabled range of the extensible boom 4. Further, at a proper place of a base part side boom 10, the hoisted load monitoring camera 6 is positioned at an upwardly acrcuate turning attitude to the attitude where the camera 6 is set nearly parallel to the extension/contraction direction of the extensible boom 4 around the shaft 70, by pressing-operating the support 7 when the extensible arm 4 contracts to the min.;COPYRIGHT: (C)1995,JPO