Increasing the speed also increases the risk of dangerous tumbles. Ideally one could have a slower speed when boarding and disembarking, and faster speeds in between, but when one considers the structure of linked steps this seems impossible. Nevertheless, Mitsubishi have devised a variable-speed escalator that only runs fast in the middle section and they have filed a patent application for it. However, even if you would like to take a ride, there does not seem to be any place where it has been introduced just yet.
Although you cannot experience an escalator that changes its speed midway, IHI Corporation have commercialized a variable-speed moving walkway called the Accel-Liner. It is used in facilities that require long-distance transfers, such as Haneda Airport in Tokyo. Not only that, but IHI is the only manufacturer in the world able to make a curved moving walkway.
This is the rubber belt moving walkway that connects the 1st and 3rd floors of the Matsumoto Performing Arts Centre in Nagano Prefecture. The total length is 45 m, and the curvature of the walkway has a radius of 83 m. Even though the speed of horizontal movement when creating a semi-circle is regular, making it possible to move concentrically, the structural problem is that movement in the horizontal direction slows to the extent that there is vertical movement in the inclined section.
Mitsubishi Electric overcame this issue by developing the "centralized motion method," in which the central point moves in stages based on the angle of incline. For example, a special chain capable of supporting a wide variety of angles required for the spiral orbit was introduced to move the steps.
Horizontal rollers are installed on the outer-side of the chain, enabling the structure to manage the inward force generated by the arching configuration. This enables the escalator steps to move along the fixed orbital plane with high accuracy. The complex shape of the track makes it one of the parts that requires a meticulous process utilizing intricate manufacturing technologies.
Using special tools and original forming know-how, technicians finish the tracks manually by repeatedly performing a series of bending and twisting processes. Even when applying three-dimensional torsion, a final accuracy of 0. Installation Highly precise installation Specialized installers assemble the truss by connecting up to 6, custom-shaped parts. After installation, multiple quality assurance checks are carried out to ensure that the finished product embodies Mitsubishi Electric quality in the most detailed areas.
In the past, some experts believed that escalators will not move in a curve unless the step-moving chains could freely expand and contract. It is said that Japanese engineers conducted numerous calculations over and over again, drawing out over blueprints, in order to solve this difficult problem. Eventually, they found out that the blueprint should be drawn by providing separate center points to the three parts with varying slopes. In the same year, the first spiral escalator was installed at the International Exhibition Center in Osaka, Japan.
Today, Mitsubishi remains the only manufacturer of spiral escalators in the world. A spiral escalator made by Mitsubishi adopts the so-called "centralized motion method", in which the central point moves in stages based on the angle of incline. This is because the movement in the horizontal direction slows the extent that there is vertical movement in the inclined section. Once the parts are delivered to the site, they will be assembled by specialized installers.
And of course it is spiral. Elevator Wiki Explore.
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