| 摘要 |
A construction assembly for making a collapsible structure has a post extending along and defining an upright post axis and having one end formed with an axially centered threaded bore open in one axial direction, normally upward. A first plate fixed on the post offset in the opposite axial direction, normally downward, from the one end extends generally perpendicular to the axis and is formed with at least one vertically throughgoing cutout offset from the post axis. A frame has a first fitting formed with a projection extending in the opposite direction through the hole and formed on the side of the first plate directed in this opposite direction with a passage that is throughgoing parallel to the first plate, and a second fitting at the one post end and formed with a projection extending in the one direction. A locking member engaged through the passage bears in the one direction on the first plate. A second plate extending generally perpendicular to the post axis is formed at the axis with a throughgoing bore and offset from the axis with a vertically throughgoing cutout through which extends the projection of the second fitting. A bolt threaded in the bore of the post passes through the bore of the second plate and has a head bearing in the opposite direction on the second plate. Thus the bolt presses the second plate down on the second fitting to lock the frame to the post. |
