| 摘要 |
PROBLEM TO BE SOLVED: To fix a ceiling batten by only pushing a bolt in and fitting an insert tool. SOLUTION: On the extreme end of a bolt 27, a spread diameter head part 28 is provided, a ring groove 29 is provided spacedly from the spread diameter head part 28, a cutout 33 having an opening of the nearly same width as the diameter of the thin part by the ring groove of the hanging bolt 27, and having a curved-in-part of the nearly same diameter as the diameter of the bolt 27 in the interior, is provided on the extreme end edge of the flange 31 on the upper edge of the vertical plate of a ceiling batten 30, and the thin part of the bolt 27 is pushed in from the opening of the cutout 33. After inserting the bolt 27 into the curved-in-part, the parallel parts 37, 37 of a U-shaped insert tool 36 are fitted into the ring groove 29, and the flange 31 of the ceiling batten 30 is pinchedly held with the spread diameter head part 28 and the insert tool 36. |
