Bolting aids and greenhouse frame structures using these aids

摘要

(57) [Summary] (Correction) [Structure] This is a bolting auxiliary tool in which a bolt hole is formed in the bottom surface of a bottomed cylinder and a locking piece is provided on the upper edge of the cylinder. [Effect] Attached member (column) and attachment member (attachment plate) 2 The locking holes 11 and 21 are opened in these, and the cylindrical portion 41 is inserted into these locking holes. The bolt hole 42 can be easily positioned by inserting and, and the head portion or the nut of the bolt can be accommodated in the tubular portion. The work efficiency is improved and the head of the bolt and the nut are not projected, so that it is not an obstacle.