The stage hoists commonly seen in daily scenarios are all designed for vertical operation, with a relatively short distance between the external protective casing and the top hook. In distinct contrast, the stage inverted hoist is a specialized variant that features the unique capability of being operated in an inverted position.
Owing to the structural characteristic of the stage inverted hoist - namely the relatively short distance between its external protective casing and the bottom hook - operators must strictly control the relative position between the lifted load and the casing during actual lifting operations. Excessive elevation of the load should be avoided during operation to prevent direct collision or extrusion between the load and the hoist's external casing. Such unwanted contact not only drastically increases the safety risks of the load shaking, tilting, or even falling, which poses a severe threat to the smooth progress of stage performances and the safety of personnel on-site; but also, the impact force generated by the collision will damage the hoist's internal transmission structure and external protective casing. This directly impairs the operational stability of the equipment, significantly shortens its actual service life, and increases the frequency of subsequent maintenance costs and equipment replacement.