JPH0189242U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 7 show embodiments of this invention. FIG. 1 is a perspective view showing the structure of a link mechanism incorporated in a loading platform lifting device according to this invention, and FIG. 2 is a loading platform of a carrier, A longitudinal side view showing a state in which the link mechanism is incorporated into the underframe and the chassis, FIG. 3 is a partially cutaway perspective view showing the loading platform of the carrier, and FIG. 4 is a cross-sectional view taken along the line shown in FIG. 3. FIG. 5 is an exploded arrangement view of parts showing the assembled state of the underframe, and FIGS. 6 and 7 are side views showing the overall structure of a transport vehicle equipped with the platform lifting device according to this invention. Moreover, FIG. 8 is a side view of a carrier vehicle showing a conventional example. 2...First lift arm, 3...Second lift arm, 7...First roller, 10...Second roller, 13...Third roller, 14...Dump arm, 15...Cylinder, 15a...Piston rod, 15b...Cylinder member, 20... Transport vehicle, 21... Vehicle chassis, 22... Vehicle chassis rail, 23... Underframe, 24... Loading platform, 27... Loading platform rail, 28... Regulating member (dump timing determining pin), 32
...Underframe rail.

Claims (1)

[Scope of utility model registration request] A link mechanism formed by cross-connecting a pair of first lift arms and a pair of second lift arms is disposed between the vehicle platform and the loading platform, and the link mechanism is driven by a cylinder to operate the loading platform. In a loading/unloading platform lifting/lowering device for a lift-cum-dump truck that performs a dumping operation, an underframe is disposed between the vehicle platform and the loading platform and the rear end is rotatably connected to the loading platform, and the rear end is connected to the vehicle platform. a pair of first lift arms rotatably connected to both rear sides of the underframe and having first rollers disposed at the front end movably supported by underframe rails extending in the front-rear direction on both left and right sides of the underframe; A chassis rail which is rotatably cross-connected to the first lift arm, whose rear end is rotatably coupled to both rear sides of the underframe, and which has a second roller disposed at the front end and which extends in the longitudinal direction on both left and right sides of the vehicle chassis. a pair of second lift arms movably supported by the first lift arm;
A third roller, which is rotatably supported on the same axis as the first roller disposed at the front end of the lift arm, and which is disposed at the rear end, is movably supported by platform rails extending in the front and rear directions on both left and right sides of the platform. The dump arm includes a pair of dump arms, a regulating member protruding inward from the loading platform rail to regulate rearward movement of a third roller disposed at the rear end of these dump arms at a predetermined position, a piston rod, and a cylinder member. and the upper end of the piston rod is rotatably connected to an intermediate portion between the first roller and the rear end connecting portion of the first lift arm, and the lower end of the cylinder member is rotatably connected to the chassis. A loading/unloading platform lifting device for a lift-cum-dump truck, characterized in that it is equipped with a cylinder.