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Locking connection for supporting grid systems
| Details |
Inventors: Sauer, Gale E.;
Assignee: Roblin Industries, Inc. (Buffalo, NY)
Primary Examiner: Kundrat; Andrew V.
Assistant Examiner:
Attorney, Agent or Firm: Christel, Bean & Linihan
A first support member having a web with a slot and a pair of second support members having locking connectors insertable through the slot in side by side relation, each connector having a resiliently yieldable finger engageable against the web after insertion through the slot for interlocking the first and second members. Each connector has a laterally projecting detent on the side opposite the finger, an opening providing an arcuate generally vertical shoulder spaced rearwardly from the detent, and a laterally projecting spring retainer on the same side as the detent extending forwardly at least partially across the opening. When the connectors are inserted through the slot in side by side relation the forward end of each connector is confined against the other connector by the retainer thereof with its detent engaging the arcuate shoulder of the other connector, thereby interlocking the second support members, the retainers yielding resiliently to permit passage of the detents into the respective openings. The arcuate shoulders accommodate generally vertical relative angular movement of the second support members, the retainers maintaining the interlock during relative angular movement both vertically and horizontally. In one form, the openings and spring retainers are elongated to accommodate axial expansion of the members under elevated temperatures. |
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DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS Referring first to the embodiment of FIGS.
1-7 there is shown a supporting grid system incorporating a locking connection of this invention and comprising a main tee support member, generally designated 1 and a pair of opposing cross tee support members generally designated 2.
Each main tee 1 can be formed of a single piece of suitable metal to provide a web 3 upstanding from tile supporting flanges 4 extending laterally from opposite sides thereof and having a generally rectangular, longitudinally extending reinforcing bead 5 along the upper edge thereof.
Main tee 1 has a slot 6 therein, subdivided by tab projections 7 extending inwardly of the slot from the upper and lower edges thereof, in spaced relation to the opposite side edges of the slot, as shown in FIG.
5.
Such slots 6 are customarily provided at spaced intervals lengthwise of the main tee 1.
Each cross tee 2 also can be formed from a single piece of suitable metal to provide a web 8 upstanding from tile supporting flanges 9 projecting laterally on opposite sides thereof and surmounted by a reinforcing bead 10 which can be similar in construction to the bead 5 of main tee 1.
Each cross tee is provided with hanger holes 11 at spaced points therealong, and similar hanger holes are provided at spaced points along main tee 1.
At the opposite ends of each cross tee 2 the supporting flanges 9 are upwardly offset, as shown at 12, to provide lip portions overlapping the main tee flanges 4 when the tees are assembled.
Each cross tee 2 is provided at its opposite ends with a locking connector, generally designated 14, formed as an integral extension of web 8 and projecting axially outwardly from the opposite ends of each cross tee 2.
Connectors 14 are laterally offset from web 8, in opposite direction at opposite ends of each tee 2, and are formed to provide a channel shaped tongue 15 comprising a recessed web body 16 slightly offset from web 8 and upper and lower longitudinally extending further offset portions 17 and 18, the channel configuration thus provided serving to mechanically reinforce the locking connectors and provide rigidity thereto
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