To provide a long size material bending method, a long size material bending die and a long size material bending apparatus which enable a long size material to accurately bent in a prescribed place.
The bending apparatus 1 is provided with the bending die 27. The bending die 27 is provided with a base mold 29 and a pair of dies 30a, 30b. The pair of the dies 30a, 30b are spaced apart along the longitudinal direction K of a metallic sheet 16. The dies 30a, 30b are freely rotatable around axial centers Pa, Pb. The dies 30a, 30b hold the metallic sheet 16 between each other in the state where the outer edge parts 34a, 34b are parallel to each other and the dies cross to the longitudinal direction K of the metallic sheet 16. A pair of the dies 30a, 30b approach each other and the bending place is formed on the metallic sheet 16.
Hiroshi Ochi
Sadao Matsumura
Isamu Kakiuchi