Patent ID: 7441748

Claim:
A hoisting and pulling device including a drive shaft that drives a load sheave, a speed reduction mechanism that transmits drive of the drive shaft to the load sheave, and a drive mechanism that transmits drive from operation means to the drive shaft through brake means and pressure receiving means, the load sheave being interposed between the speed reduction mechanism and the drive mechanism, the hoisting and pulling device comprising a body frame molding integrally, on an outer peripheral end surface thereof, a speed reduction side frame having a speed reducer side cover installation section, a drive side frame having a drive side cover installation section, and a connection frame that journals the load sheave and connects the speed reduction side frame and the drive side frame opposite to each other, and wherein the connection frame has, at a lower end thereof, a frame bottom plate molded integral with the body frame, the frame bottom plate is provided with a pair of crosswise guide holes in communication to a guide groove, which guides a chain wound around the load sheave, and a chain entangling preventing projection projecting toward the load sheave between the pair of crosswise guide holes, the load sheave has a notch recess section that avoids the chain entangling prevention section when the load sheave is mounted, and the speed reduction side frame and the drive side frame have a hook installation section to suspend a hoist body above the body frame.