| 摘要 |
PURPOSE:To simplify the connection and enhance the workability simply by rotating a hanging bolt from below even when the connection part is not accessible with regards to a connection structure which connects a hanging bolt to a metal plate in a building having a metallic plate in folding structure on a ceiling. CONSTITUTION:This comprises a metallic plate 4, which forms a reinforcing rib 6 in folding plate structure so that a dovetail groove 5 may be formed on the bottom and an engagement piece 2, whose width dimension W1 is smaller than an opening width W2 of the dovetail groove 5 and whose diagonal line is longer at least than a maximum dimension 3 in the dovetail groove 5 and a hanging bolt 1 which screws the engagement piece into the upper end so that it may be rotated freely. A rotary transmission member, such as adhesive tape 3, which rotates the engagement piece 2 together in the dovetail groove 5 when rotating in sliding contact with a part of the hanging bolt, is fixedly mounted to the engagement piece 2. |
