FRAME BODY MADE OF STEEL PLATE

摘要

PROBLEM TO BE SOLVED: To provide a frame body that has a machine screw hole similar to a machine screw hole of an aluminum extrusion mold material and capable of being formed by simple means.SOLUTION: A frame body is formed in a hollow column shape or a groove shape by bending and forming a plated sheet steel with a plate thickness of less than 2.3 mm. The frame body made of a steel plate has a protrusion for a machine screw hole, which is formed in the state of integrally protruding from the frame body along the longitudinal direction of the frame body and which has an internal space.