The name "Movable Pulley" comes from the mechanism's movable axis which strategically adjusts the pulley during operation. The pulleys double the amount of weight you can move in a single motion. You can also lift items twice the height of the distance you pull the lever (in this case the force required is twice that of the weight of the item being moved).
Movable Pulley Karakuri mechanisms allow you to lift heavy objects to great heights with minimal effort, decreasing cycle times, improving ergonomics, and increasing productivity. Thanks to this system, operations can occur at heights normally out of reach. The possibilities are limited only by your imagination.