An always upright bookshelf
The adjustable bookend keeps books upright regardless of how many there are. The walnut wood pieces are held together with 3d printed brackets and the bookend mechanism was designed and 3d printed to take a captive nut and use a threaded bolt so that it can be loosened and tightened with the 3d printed knob.
December 2018
The bookend is a threaded rod into a 3d printed stop block with a captive nut
The 3d printed brackets keep the shelf separated enough for the stop to slide freely from side to side