| 摘要 |
PROBLEM TO BE SOLVED: To provide a J-shaped ledger plate lateral displacement prevention metal fitting of a scaffold.SOLUTION: A J-shaped ledger plate lateral displacement prevention metal fitting is composed of a J-shaped cotter bolt 1 being long on the male screw side and a flat steel plate 2 in which there are an elliptical hole capable of passing a bolt part and unable to pass a hexagonal nut 3 on the male screw side and a snowman-shaped hole of overlapping a large hole capable of passing a cotter part 5 and a small hole unable to pass on the hexagonal cotter part 5 side and an elliptical hole part being a rectangular shape in a plane and capable of longitudinally moving a male screw when viewed from the side is flat and reinforced by a rib in the long side direction of becoming flat again from a curve apex in a circular shape along an outer diameter of a horizontal member up to the apex of the horizontal member from a part of contacting with the horizontal member of a building frame, and the J-shaped cotter bolt 1 is inserted into the building frame horizontal member, and is fixed to the horizontal member by fastening a hexagonal nut 3 after preventing so as not to slip out the hexagonal cotter part 5, and a steel ledger plate is prevented so as not to be displaced when a claw metal fitting of the steel ledger plate contacts with a J-shaped ledger plate lateral displacement prevention metal fitting.SELECTED DRAWING: Figure 4 |
