STANDARD FOR PARTITION

Abstract: Partition standard bent to have a fluted shape, particularly for use in a partition. Such standards are being used e.g. for fixing plaster boards when erecting partitions. The plaster boards are affixed with screws on both sides of the standards in a common partition structure. The price of the standard depends on the material thickness of the metal sheet that is used for it. The rigidity of the standard depends on the design and on the material thickness of the sheet that is used. With the design of the invention, in which in the back (1) of the standard are made transversal reinforcing grooves (5) either in addition to longitudinal reinforcing grooves (4) known in themselves in the art or without them, the sheet thickness may be reduced from 0.56 mm to 0.4-0.5 mm. The rigidity may also be increased by providing in the flanges (2), transversal grooves (7). As taught by the invention, the grooves (5, 8) in the back (1) extend close to the bend (6) of the standard or a small distance past the bend.

Description: STANDARD FOR PARTITION The present invention concerns a standard -for a partition, which has recently been adopted in replacement o-f timber uprights in partition or equivalent structures. The partition standard has been bent to be a post with -fluted cross section. The advantage o-f a post made o-f metal over a timber up¬ right is that it does not experience such "working" under e-f-fect e.g. o-f heat and moisture as is the case with wood. Nowadays in partitions plaster boards are much used, in which case the thermal expansion cαe-fficients o-f the partition standard and o-f the board that is attached thereto are virtually the same. #. Nowadays, a standard design as shown in Fig. 1 is used. By the longitudinal bends depicted here, the standard is endowed with good enough rigidity. A plaster board, for instance, is a-f-fixed with screws suited to the purpose to the side walls, or -flanges 2, o-f the standard, on both sides o-f the standard. It is advisable to roughen the surface of the flange so that the point of the screw will not slip as the screw is being fixed. The material thickness of the standard is at least 0.56 mm, whereby the rigidity of the standard's flanges is good enough. Various frame structures reinforced with the aid of bends are known in the art. Such are disclosed e.g. in the DE publicizing print No. 1 271 350 and in the GB application print No. 2,136,469. However, the structures presented in these are hollow beam structures, not partition standards of fluted shape. Since they are enclosed tubu¬ lar structures, their bending properties are entirely different from those of structures with fluted shape. In the U.S. Patent No. 4,016,700 has been disclosed, as a thermally insulating wall structure, a fluted structure. Since the purpose of the structure is to prevent heat conduction through the standard from one side to the other of the wall, the standard is so perfo¬ rated that the path conducting heat is narrow and long. The struc¬ ture hardly at all counteracts the curving of the standard's back, because the transversal apertures provided with marginal bends are short. In fact, the design of the U.S. reference does not aim at raw material saving as the present invention does. Since the price of the standard is dependent on the material thick¬ ness, the object of the invention is to provide a rigid enough partition standard in which the material thickness is less than that used at present. The metallic partition standard αr equivalent bent to fluted shape of the invention is characterized by the circumstances stated in •the characteristic features part of claim 1. The invention is more closely "described with the aid of the draw¬ ings attached. Fig. 1 presents a partition standard which is presently used. Fig. 2 presents a standard according tα the invention. Fig. 3 presents another standard according to the invention. Fig. 4 displays on larger scale the detail indicated with the circle A in F.igs 2 and 3. Fig. 5 shows the section carried through the reinforcing groove 5 presented in Fig. 4, at C-C. Fig. 6 shows on enlarged scale the detail indicated with the circle B in Figs 2 and 3, viewed from above. Fig. 7 presents a new partition standard according to the inven¬ tion, having transversal reinforcing grooves. Fig. 8 shows the sectional drawing of the preceding reinforcing groove at the back 1 of the standard, Fig. 7 D-D. Fig. 9 shows the end of the reinforcing groove, schematically in the region of the bending point betwwn the back 1 and the flange 2 of the standard, Fig. 7 A. Fig. 1 presents a partition standard of prior art, featuring a back 1 of the standard, flanges 2, marginal bends 3 and longitudinal reinforcing grooves 4. A standard of this kind is made of material having a material thickness not less than 0.56 mm. The partition standard of the invention, depicted in Fig. 2, may be made of 0.4 to 0.5 mm material thickness. The cost saving compared with existing standards amounts to FIM 0.15 to 0.32 p-r metre if 0.5 mm material thickness is used. Requisite reinforcing is accom¬ plished with transversal grooves 5 in the back 1, as taught by the invention. ^In Figs 4 and 5 is shown the end portion A, in Figs 2 and 3, of the groove 5. This reveals that the groove extends quite close to the bend 6 of the standard, and that the width of the groove end is preferably substantially the same as the width of the groove. The end of the groove 5 reinforces the standard in longi¬ tudinal direction, while the rest of the transversal groove 5 rein¬ forces the back 1 of the standard in transversal direction. For reinforcement of the transversal direction of the flanges 2, there have furthermore been made transversal grooves 7 in the flanges of the standard. The point B of Figs 2 and 3 is seen on a larger scale in Fig. 6, where this region has been depicted as viewed from above. The grooves 7 extend up to the bend 6. The transversal bends of the standard in the back portion reinforce the standard to such extent that a smaller material thickness can be used. The transversal grooves 5 are made with wider spacing, and deeper, in a standard having a wide back. In a narrow standard the grooves 5 may be made with closer spacing and shallower. The grooves 5 and 7 reinforce the standard in such manner that the b ack 1 and the flanges 2 are rigid enough even if the material thickness of the standard should be only 0.4 to 0.5 mm. I f one considers that in Finland alone at present already between 10 and 15 million metres of partition standard material are annual¬ ly consumed, it becomes clear how economical it is to achieve even a minor reduction of the material thickness in- the sheet. The importance of the invention will further increase as the use i creases. The partition standard can be made so that it has, in the back of the standard, longitudinal reinforcing grooves 4 and, in addition, transversal grooves 5 and 7. It may also be made so that it has only transversal reinforcing grooves, because the flanges 2 and grooves 3 already endow rigidity in the longitudinal direction and the ends of the ' ransversal grooves 5 further assist. Thus the most important thing is that the standard has transversal grooves 5 in the back 1 which act both longitudinally and transversally. In a structure according to the invention, the transversal groove ends close to the bend 6 between the back 1 and the flange 2, as has been shown in Figs 2 and 3. It has been found in experiments that the rigidity is improved if the reinforcing groove 8 continues a little over the bend 6. The cross section of the reinforcing groove 8 has at the back 1 the cross section shown in Fig. 8. The groove 8 continues some distance over the ben.d and tapers down gradually, being transformed into a planar surface, like Fig. 9 shows schematically , referring to the point A of the standard. It has thus been found that with reinforcing grooves like those in Fig. 7 even more rigid partition standards are obtained than the standards of Figs 2 and 3 reinforced with transversal grooves. In the foregoing, embodiment examples have been presented, which may be modified within the scope of the claims. The standard has been called a partition standard because partitions in buildings are its principal application. The standard may be employed to other purposes as well in which a similar way of building can be contemplated. The standards are also intended for ixing not only plaster boards but they are also meant to serve other equivalent purposes.

Claims: CLAIMS 1. A partition standard or equivalent bent of metal in fluted shape and which may in its back (1) have longitudinal reinforcing grooves (4), characterized i n that the back (1) has been reinforced with transversal grooves (5,8) which extend close to the bend (6) of the standard or past it a small distance. 2. Partition standard according to claim 1, characterized in that the transversal grooves (5) in the back (1) terminate close to the bend (6) with a width substantially equalling that of the rest of the groove. 3. Partition standard according to claim 1, characterized in that the reinforcing groove (8) has at the back (1) of the standard a curved bottom which after the bend (6) of back (1) and flange (2) gradually tapers down in width and thickness to a planar surface. 4. Partition standard according to claim 1, 2 or 3, characterized in that in the flanges ; (2J of the standard there are transversal rein¬ forcing grooves (7). 5. Partition standard according to claim 4, characterized in that the grooves <7) in the flange extend up to the bend (6) of the standard.

Inventors: LUNDELL AULIS, LUNDELL, AULIS
Applicants: AULIS LUNDELL OY
Application year: 1985
Main classification: E04C3
IPC codes: E04C3