Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1993-05-28
1994-10-04
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 60, 411 69, 411 72, F16B 1304, F16B 1306
Patent
active
053520777
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a fixing element of metal.
More particularly, it relates to a fixing element which has a slotted expansible sleeve arranged to be expanded into an undercut of a drilled hole, and an expander element effecting the expansion and having a head for clamping an article to a facing panel.
The invention relates to a fixing element of metal according to the preamble of claim 1.
To fix facing panels that are relatively thin in thickness, drilled holes of very small depth and with an undercut are made on the rear side of the facing panel. Conventional fixing elements with expansible sleeves are little suited to this application, since the expansible sleeve is driven using hammer blows onto an expander element resting at the bottom of the bore in order to effect anchorage of the fixing elements. The facing panel could be broken or the bore punched through by the hammer blows.
DE 40 11 229 A1 discloses a fixing element in which these disadvantages are avoided. Instead of an expansible sleeve, this fixing element uses a metallic ring bent into a roof shape, the bent ends of which rest on the conical outer surface of an expander cone resting at the bottom of the drilled hole. Using a setting tool the ring can be pressed flat by slight pressure and bent into the undercut of the drilled hole. In order to avoid the bore being punched through thin facing panels, the pressure force applied has to be judged exactly. A device of that kind is therefore expensive and generally set up at a fixed location. The fixing elements are applied to the facing panels at this location and the panels are then transported to wherever they are to be installed. Because the fixing bolts project beyond the rear side of the facing panels, these cannot be stacked for transport. Shifting the panels and relatively long transportation distances therefore adversely affect the operating process.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a fixing element which avoids the disadvantages of the prior art.
The invention is therefore based on the problem of producing a fixing element, in particular for fixing facing panels, which can be mounted in a simple and reliable manner even in very thin facing panels without using a complicated setting tool.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a fixing element in which, in accordance with the inventive features, the expansible sleeve has inwardly bent expansible segments with a circumferential enlargement on their outer surface in the region of their leading end face, and the expander element is formed as a blind rivet with a clench head drawn with a rivet shank into a slotted part of the inner bore of the expansible sleeve and riveted. For anchoring, the fixing element is inserted into a prepared drilled hole in the facing panel until the end face of the expansible sleeve rests at the bottom of the drilled hole. The blind rivet with its clench head in front is then inserted through a bore of the article to be fixed to the rear of the facing panel and through the inner bore of the expansible sleeve until the rivet head rests against the outer surface of the article to be fixed. Using rivetting pliers, the clench head of the blind rivet is drawn by way of the rivet shank into the slotted part of the inner bore of the expansible sleeve and rivetted. The compression and deformation of the clench head expands the expansible segments and the enlargement arranged on the outer face is pressed into the undercut of the drilled hole. At the same time, the article to be fixed is clamped by the rivet head against the rear side of the facing panel. The article may be a hook, fixing bracket or the like, with which the facing panel can be affixed or screwed to a subconstruction. An invisible fixing of the facing panels is thereby achieved, which withstands high pressure forces and pulling forces. The plastical
REFERENCES:
patent: 2370327 (1945-02-01), Rosan
patent: 3390601 (1968-07-01), Summerlin
patent: 4388031 (1983-06-01), Rodgers
patent: 4789283 (1988-12-01), Crawford
patent: 4949450 (1990-08-01), Scharres
fischerwerke Artur Fischer GmbH & Co. KG
Striker Michael J.
Wilson Neill R.
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