Changing the philosophy behind the spiral

How did the members of the Mitsubishi Electric development team solve the problem? The answer lies in a ''moving central point.'' To understand what this is, is to grasp what happens when a fixed central point is used in designing a spiral escalator. As mentioned previously, the twisting inevitably occurs when the center point is fixed. To solve the problem, the junction between steps must be opened up, which requires a complex mechanism to be installed. It was not feasible in terms of both costs and safety. The development team changed tactics and instead focused from the point of ''What can we do to prevent the twisting from occurring?'' The answer was the moving central point. The center is not fixed, but instead moves along a fixed structure with the spiral so the twist does not occur at the junction. This allowed a design with a mechanical structure that was usable. Although it was simple idea, it was a huge ideology shift that nobody had ever thought of before.