Patent ID: 7476071

Claim:
A vehicle equipped with a lift device for loading and unloading objects, said lift device comprising: two link units disposed in parallel on the top of the vehicle with a predetermined gap therebetween, and a drive source for operating both link units, each of said link units comprising: a first telescoping arm and a second telescoping arm, which are disposed parallel to each other in an upright posture on the top of the vehicle, and each of which comprise a base arm member of a predetermined length and a slide arm member, which is mobile in the lengthwise direction of said base arm member; a base link which connects the first telescoping arm and the second telescoping arm to each other; a support link, disposed parallel to the base link, which connects the slide arm members of the first telescoping arm and the second telescoping arm to each other; a drive boom, which is swung up and down on the top of the vehicle around a drive shaft, that is rotationally driven by said drive source; and a follow boom, which is swung, in the same direction as said drive boom, around a support shaft that is parallel to said drive shaft around which the drive boom swings, wherein one of the ends of the drive booms in these link units being coupled to the drive shaft, the base arm member on said first telescoping arm being attached to the leading end of said drive boom, the base arm member on said second telescoping arm being attached to the leading end of said follow boom, said support link constituting a horizontal support member for supporting the weight of an object that is to be loaded and unloaded, while being maintained parallel with said base link, and wherein said first telescoping arm and said second telescoping arm being swung between a standby position within the area of the top of the vehicle and a deployed position outside the area of the top of the vehicle by the swing movement of said drive boom, so as to be vertically inverted while being maintained parallel to each other, and in said deployed position, the slide arm members of the first telescoping arm and the second telescoping arm being acted upon by gravity so as to extend in a downward movement from the base arm members.