| 摘要 |
A locking and securing means is disclosed which includes a base member, a threaded member and a sprocket. The base member defines vertically extending fingers with gaps therebetween and a threaded bore. The threaded member with a flat or irregular shape on its upper leg segment extends through this bore to a desired position. The sprocket, which is mounted on the threaded member prior to insertion into the bore, has radially extending teeth to mesh with the base-member-defined gaps and an internal shape to mate with the threaded-member shape. The threaded member is thus secured to a fixed height or position. |
