| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ladder fixing jig and a set of the ladder fixing jig and a safety block attachment jig for reliably attaching a ladder to a covering plate, etc. provided to an opening of a road face in excavation work of the road face.SOLUTION: A ladder fixing jig 1 includes: a pair of U-shaped metal fittings 3 which are disposed being separated from each other to grip a convex part protruding to a horizontal direction from a vertical direction; and a ladder anchor block 5 coupling the U-shaped metal fittings 3 in a vertical part. The U-shaped metal fitting 3 is constituted of: a web 7 in the vertical part; an upper flange 9 protruding in a horizontal direction to the convex part side from the upper end of the web; and a lower flange 11 extending in a horizontal direction to the convex part from the lower end of the web. The ladder anchor block 5 is constituted of: a horizontal part 21 that connects the vertical part of the U-shaped metal fitting 3; an extension part 23 which extends vertically from both ends of the horizontal part 21 to the opposite side of the convex part; and a hook part 27 for fixing a crossbar of a ladder, which is provided to the extension part 23 so as to open/close using a cord 25.</p> |
