Patent ID: 8641356

Claim:
An elevating conveyance device comprising: a base; a multistage extensible column extensible vertically stood on the base; an object support; and an extending and contracting drive mechanism, wherein the multistage extensible column includes a fixed column portion to be fixed onto the base, one or more mid-stage elevating column portions movable vertically with respect to the fixed column portion, and a final-stage elevating portion movable vertically with respect to the mid-stage elevating column portion, the object support is provided on the final-stage elevating portion of the multistage extensible column, and the extending and contracting drive mechanism is provided in the fixed column portions and includes an elevating drive means which drives and elevates the next mid-stage elevating column portion, pulley-wound type winding suspending chains which are provided in the mid-stage elevating column portions and convert upward movement of the mid-stage elevating column portions with respect to the previous column portion into an upward movement of the next mid-stage elevating column portion or final-stage elevating portion with respect to the mid-stage elevating column portion, a fluid pressure cylinder which urges the next mid-stage elevating column portion upward with respect to the fixed column portion, and fluid pressure cylinders which urge the next mid-stage elevating column portion or final-stage elevating portion upward with respect to the mid-stage elevating column portion.