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Captive fastener snaps to it
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14/03/2008
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Dirak has brought out a captive fastener that uses its D-Snap technology to allow it to be installed in a moment in suitably stamped cut-outs.
Combining the functions of a captive screw and captive nut or cagenut, the Snap-Line Captive Joiner is designed to fit the standard 9.5mm x 9.5mm cut out of 19 inch racks.
The Joiner is pushed into the cut out in the front panel, upon which a riveted leaf spring widens to prevent the component from falling out and makes it captive. It is then inserted into the cut out in the rear panel, which can be made oblong for tolerance adjustment, where is its kept in position by D-Snap wedges. This ensures alignment of the two panels.
Full insertion into the second panel securely fastens the two panels together. To disengage, an insert in the fastener, formed either as a knob or screwdriver insert, is turned. This pulls the snap wedges backwards so that the front panel can be disengaged from the back panel. The component then remains held in the front panel by the leaf spring.
In applications requiring more than one fastener, each is pre-released by turning the inserts and pulling them until the leaf springs touch the front panel. When all have been released, the front panel can be removed from the back panel.
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Author
Tom Shelley
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