Hoisting machines for elevators, being heavy products, were previously shipped in wooden crates which could be adjusted according to the size of the product, but since man-hours was required for preparing materials, constructing crates, etc., we made a returnable steel container with the intention of reducing man-hours and cost. The improvements enabled the unification of container size, sharing and reuseable, stacking in warehouse, and when not in use, folding for transporting or storing.