tweevouw

Tweevouw is a design term describing a two-stage folding mechanism used to reduce the size of an object for storage and to restore function when deployed. The word combines Dutch roots: twee meaning 'two' and vouw meaning 'fold.'

In a typical tweevouw system, two sequential folds rotate along two hinge lines. An intermediate locking stage may secure the structure in its deployed configuration, while separate actuators or gravity assist the folding and unfolding process.

Materials range from aluminum and composite panels to coated woods. Achieving reliable performance requires tight manufacturing tolerances for hinges and alignments, as misalignment can cause binding or premature wear in repeated cycles.

Origins: the term emerged in Dutch design discourse in the early 21st century and was later adopted by designers working on transformable furniture, modular architecture, and portable displays. The concept emphasizes efficiency of stowage without sacrificing structural integrity.

Variants include the simple tweevouw, with two folds on a single axis, and cross-tweevouw, with folds on perpendicular axes. Benefits include reduced storage volume, faster deployment, and modularity; challenges include tolerance sensitivity, hinge wear, and the need for precise locking mechanisms.

Related concepts include deployable structures and transformable furniture.