An expansion fastener for hardware elements for furniture

摘要

An expansion fastener for hardware elements of furniture, comprises a screw anchor (11) in which an insert (13) is fitted. The insert has a cam surface (14) sliding on a corresponding surface (15) in the anchor body for causing a radial expansion of the anchor, when the insert is moved through pulling means such as a lever (16). A blocking surface (fig 5) keeps the lever in the expansion position. A second embodiment uses a metal cam surface (14) resulting in a greater expansion force.