Mass production model installed in the 2nd battery manufacturing company. Horizontal shutters used as safety footrests for maintenance inspections.

Applied to automated warehouses using Stacker Crane (workplaces with a risk of crashing more than 1 floor).

Normally the shutterbox is inserted into the shutter box to ensure that the Stacker Crane works smoothly, and during checks and manual picks, the shutter is opened to act as a foothold.