CLIP FOR PLASTER BOARDS

Abstract: A clip for attachment of flat boards on thin walled profiles is disclosed, which clip comprises an outer strip (1) and an inner strip (2), mutually connected by a folded back (3). The inner strip (2) is provided with a cam. By the spring force of the folded back (3), the cam is urged towards the outer strip (1), allowing the clip to be attached to a thin walled profile. In the inner strip (2) two U-shaped cuts (8,9) have been provided. In the outer strip (1) two cuts 12, 13) have been provided, which are folded so that the attaching lips (14, 15) for the plates to be attached are provided. These plates are to be located between the lips (14, 15) and the outer strip (1).

Description: The present invention relates to attachment material for the attachment of flat boards on thin walled sections. For the attachment of flat sheets, for instance plaster boards on thin walled steel sections, often use is made of tapping screws, which have to be provided on regular intervals, after which these selftapping screws are screwed into holes, and this screw drills itself a hole into the wall of the thin walled profile by its sharp point. Thus a connection is obtained between the plaster board and the thin walled section. For attachment of the boards, the plaster boards have to be located in their correct positions, after which the screws have to be screwed into the plaster boards. This last action especially requires a substantial amount of effort. Besides, the danger exists that the plaster board is damaged. The screwing tools used therewith produce a lot of noise nuisance. G-A-651891 discloses a system comprising a thinwalled section having at east two walls perpendicular to each other, a board and a clip for attaching said board to said profile, one wall of which extends parallel to the board to be fitted, said clip formed of a metal strip comprising: a first member extending over substantially the same width as and parallel to said one wall at the outer side thereof; a second member extending along the inner side of said one wall comprising a cam urged towards the first member by spring pressure, wherein two fixation hooks for receiving the edge parts of two adjacent boards extending in opposite directions, are formed substantially in the middle of the first member in the longitudinal direction of the clip. The system according to the present invention distinguishes from this prior art clip by the fact that said section is provided at regular intervals with slots in the second wall in the vicinity of the one wall, said slots being adapted to receiving said second member of said clip for positioning said clip over the length of said section. This allows the clip to be attached to said before the positioning of the boards. Further the danger that the prior art clips drop after a possible weakening of the clip is avoided. Subsequently the clip according to the present invention will be elucidated with the help of the accompanying drawings, in which: fig. 1: is a partially broken away perspective view of a first embodiment of a clip according to the present invention; fig. 2: is a perspective view of a second embodiment of the clip according to the present invention; fig. 3: is a perspective view of a third embodiment of the clip according to the present invention; and fig. 4: is a perspective view, partially broken away, of a thin-walled section, onto which the clips according to the present invention are used for the attachment of plaster boards. The embodiment of the clip depicted in fig. 1 according to the present invention comprises a substantially flat inner strip 2, which are connected by means of a folded back 3. The inner strip 2 is ben inwardly at the location of the folding line 4, so that a plane 5 is obtained, which is separated from a second plane 7 by a folding line 6. Thus at the location of the second folding line 6 a cam is obtained which is urged towards the outer strip 1 by means of the spring force of the bach 3. Further in the inner strip 2 two U-shaped cuts 8, 9 have been provided and the lips 10, 11 resulting therefrom are folded, so that they extend outwardly relative to the inner strip 2. Further two cuts 12, 13 have been provided in the outer strip 1, whereas the lips 14, 15 thus obtained have been folded over the folding lines 16, 17 respectively. Further the lips thus obtained are folded once again at folding lines 18, 19 respectively, so that triangular hooks 20, 21 are obtained. For the application of this clip one is referred to the discussion of fig. 4. The embodiment shown in fig. 2 comprises again an outer strip 22 and an inner strip 23, which are connected by a back 24. The inner strip 23 comprises a cam 25 at its distal end, which is urged towards the outer strip 22 by the spring force of the back 24. Thus the clip is clamped onto one wall of the section. Further two parallel cuts are provided in the outer back 22, so that a smaller strip 26 results, wherein the resulting strips 27, 28 are folded at the folding lines 29, 30 respectively, whereas the strips 27, 28 have been folded once again on some distance from the outer strip 22 at folding lines 31, 32, respectively, so that hooks results for the attachment of the boards. Finally fig. 3 shows a last embodiment of the clip according to the present invention, in which the clip comprises an outer strip 33, which is connected with an inner strip 35 by means of a back 34. The inner strip 35 comprises a folding line 36, so that a cam is obtained. At its free end the inner strip 35 has been provided with a fixating cam 36. The outer strip 33 comprises a cut 38, in which the resulting lip 39 has been folded at a folding line 40. Further the lip 38 comprises a further cut and the resulting triangular hooks are folded around a folding line 41 towards opposite sides. The hooks 32, 33 each comprise a barb at each of their ends. When using the clip according to the present invention use is made of a thin walled substantially C-shaped steel section 35, which comprises a back 46 and two parallel sides 47, 48. At the back 46 rectangular apertures 49 have been provided on regular intervals and on a short distance from the side concerned. For attachment of the plaster boards 50 according to the present invention, one uses the following procedure. Initially when using the clips 51 according to the embodiment described with the help of fig. 1, these clips are shifted into the relevant apertures 49, to such an extend, that the fixing cam 10 is adjacent to the inner side of the back 46, fixating the clip 51. Subsequently the relevant plaster boards 50 are located on the correct position against the wall 47. One has to bear in mind, that on some distance from the width of the relevant plaster board another section 45 is present, and that the relevant plaster board 50 can be attached at that side by the relevant clip 51. When the plaster board 50 has been located, the clips 51 concerned are moved towards the plaster board 50, so that this is also fixated at a location of the section 35, as the plaster board 50 is locked up between the inner strip 1 of the clip 51 and the relevant hook 21. Subsequently the next plaster board 52 can be shifted between the outer strip 1 and the hook 20, so that this plaster board is fixated as well at the relevant side. Fig. 4 further shows how the plaster boards have been provided at both sides of a profile 45. In the clip according to the present invention, the contact area between the plaster board and the section is substantially smaller than in the prior art means of attachment, in which the plaster board is attached towards the section over its full length. Thus the transmission of contact noise will be much less, so that a wall built with clips according to the present invention will have better noise damping properties than prior art walls composed of plaster boards. An equivalent consideration is valid relative to the fire retarding properties of the wall. In the upper description three different embodiments of the present invention have been described, which each comprise a certain line of features. It is, however, possible to produce clamps, which comprise other combinations of the features described, and these are described in the appended claims.

Claims: 1. A system comprising a thin-walled section (45) having at least two walls perpendicular to each other, a board (50) and a clip for attaching said board to said section, one wall of which extends parallel to the board (50) to be fitted, said clip formed of a metal strip comprising: a first member (1) extending over substantially the same width as and parallel to said one wall (47) at the outer side thereof; a second member (2) extending along the inner side of said one wall comprising a cam (6, 25, 36) urged towards the first member (1) by spring pressure, wherein two fixation hooks (20, 21) for receiving the edge parts of two adjacent boards (50) extending in opposite directions, are formed substantially in the middle of the first member (19) in the longitudinal direction of the clip, characterized in that said section is provided on regular intervals with slots (49) in the second wall (46) in the vicinity of the one wall (47 or 48), said slots being adapted to receiving said second member of said clip for positioning said clip over the lenght of said section. 2. A system according to claim 1, characterized in that said clip is provided with at least one fixation cam (10, 11), extending slopingly outwards from the second member (2). 3. A system according to claim 1 or 2, characterized in that the fixation hook (14, 15) of said clip is pointed (20, 21). 4. A system according to claims 1-3, characterized in that the part of said clip extending perpendicular to the first element (1) comprises a reinforcement rib (30). 5. A system according to claims 1-3, characterized in that said fixation hook (41, 42, 43) comprises a bended point (44). 6. A system according to one of the preceding claims, characterized in that the inner strip (23) of said clip extends over the full width of said one wall (47) of said section.

Inventors: DINGEMANS, MARINUS JOHANNES MARIA
Applicants: DINGEMANS BEHEER B.V.
Application year: 1989
Main classification: E04F13
IPC codes: E04F13