| 摘要 |
PURPOSE:To hang down a hang bolt vertically below No.2 hang piece by boring a hole in No.1 hang piece, inserting in the hold a pair of hitch arms protruding on the No.1 hang piece at the No.2 hang piece, and permitting them to make relative rotation. CONSTITUTION:A hitch hook 4 of No.1 hang piece 1 is inserted in a joint A1 of panels A placed parallelly on a roof, and is detained fast. A hitch arm of No.2 hang piece 5 is inserted in a hole 2 of the No.1 hang piece 1 and notched groove 3 around it, while a peripheral edge of this hole 2 is inserted into cut-in groove 7a in hitch arm 7. The No.2 hang piece 5 is rotated to hold a basis 8 horizontally. The head of a hang bolt 9 is screw fitted with a nut 10 fixed to this basis 8. Thereby the hang bolt 9 can be hung vertically at the roof A through metal fixtures. |
