| 摘要 |
1. Manoeuvring device articulated on a truck chassis (1) to enable the operation of manoeuvring a container, comprising a lower arm (2) hinged at its rear end on the rear end of the truck, a lifting arm (3) hinged at its rear end on the forward section of the lower arm, a hooking arm (11) provided with a prehension hook (12) at a free end and hinged at its lower end on the lifting arm so as to forme an angle profile with a variable vertex with this lifting arm, locking means (4, 5, 6) adapted to enable the locking as a single unit of lower arm (2) and lifting arm (3) in approximate alignment or the unlocking of these two arms so as to allow the lifting arm to pivot with respect to the lower arm, and at least one driving jack (14, 15) hinged on the forward section of the chassis, the said manoeuvring device comprising at least one rod (7) hinged, on the one hand, at its forward end on the rear end of the hooking arm (11) at a vertically offset point (13) with respect to the hinge (10) of the lifting arm on the said hooking arm, on the other hand, at its rear end on the lower arm (2) at a vertically offset point (8) with respect to the hinge of the lifting arm on the said lower arm, the hinges (9, 10; 8, 13) of the lifting arm (3) and the rod (7) respectively on the hooking arm (11) and the lower arm (2) presenting mutually inverted positions in the rest position of the manoeuvring device, so that, in this configuration, the lifting arm (3) and the rod (7) are crossing, the driving jack (s) (14, 15) being located to operate on an intermediate area (17) of the lifting arm (3) so that its (or their) operation provokes, after unlocking of the locking means (4, 5, 6) a pivoting of the lifting arm with respect to the lower arm, with at first a decrease of the angle (alpha) formed between lifting arm and hooking arm and then an increase of the said angle starting from the position where the lifting arm and the rod are uncrossing. |
