EP1573144A1

EP1573144A1 - Planar metal element and profile element

Info

Publication number: EP1573144A1
Application number: EP03767654A
Authority: EP
Inventors: Kilian Krettenauer
Original assignee: Protektorwerk Florenz Maisch GmbH and Co KG
Current assignee: Protektorwerk Florenz Maisch GmbH and Co KG
Priority date: 2002-12-18
Filing date: 2003-11-25
Publication date: 2005-09-14
Anticipated expiration: 2023-11-25
Also published as: AR042502A1; CY1108627T1; PT1724409E; CA2510755C; PT1573144E; RU2005122472A; DK1573144T3; AU2003292114C1; RS51503B; PL401031A1; AU2003292114A1; SI1724409T1; PL217245B1; PL215863B1; UA81645C2; ATE409258T1; CY1108622T1; BR0317562A; TW200427907A; BR122013027113B1

Abstract

A planar metal element with a surface running from one first outer edge (8) to a second outer edge (9), lying opposite the first outer edge is disclosed. The region of the metal element, adjacent to the first outer edge (8), forms a first boundary region (26) and the region of the metal element, adjacent to the second outer edge, forms a second boundary region (27). Both boundary regions (26, 27) are connected to each other by means of a mid region (28), lying between the above, whereby at least one fully enclosed hole (23, 24) is embodied in at least one of the boundary regions, the enclosure of which is formed partly from said boundary region (26, 27) and the other part is formed by the mid region (28). The mid region (28) comprises at least two sections (29, 30), each comprising two outer partial sections (31, 33, 34, 36) and a mid partial section (32, 35), lying between the above. The outer partial sections (31, 33, 34, 36) are folded against the mid partial section (32, 35) to generate the hole (22, 23). The sections (29, 30) form a part of the enclosure of the hole (22, 23) and the mid region (28), including sections (29, 30), is embodied as one piece with both boundary regions (26, 27) of the metal element.

Description

Flat metal element and profile element

The present invention relates to a flat metal element with a surface which extends from a first outer edge to a second outer edge opposite the first outer edge, the region of the metal element adjoining the first outer edge having a first edge region and the region adjoining the second outer edge of the metal element forms a second edge region, both of which are connected to one another by an intermediate region lying therebetween, and at least one completely bordered opening is formed in at least one of the edge regions, the boundary of which is partly formed by this edge region and partly by the central region , Furthermore, the invention is directed to a profile element which is produced from such a flat metal element.

Flat metal elements of the type mentioned are used for example in the manufacture of profiles. Such profiles can be, for example, upright profiles, such as are used in particular for fastening panel-shaped elements in interior construction, or also corner profiles, which are mostly used for plastering to protect corners. In particular for such plaster profiles, it is necessary that these profiles have material perforations so that the plaster can penetrate through the profiles and thus a fixing of the profiles is guaranteed. Such openings are usually produced by punching processes, so that the punched-out parts form waste. On the one hand, this is disadvantageous because these parts must either be disposed of or recycled. On the other hand, a major disadvantage is that the costs for producing a corresponding profile are largely determined by the material costs. Punching out partial areas is therefore uneconomical, especially if the punched out partial areas have to be disposed of as waste.

To avoid this disadvantage, it is already known to produce perforated profiles from expanded metal. When expanded metal is used, slots are cut into the metal sheet used to produce the profiles so that the metal sheet is then pulled apart on two opposite sides, the slots widening to the desired openings. The material lying between the openings is stretched or stretched, as a result of which the desired deformation and associated widening of the material takes place. However, the stretching of the material creates stresses in the material which can lead to an undesirable weakening. The bending stiffness of expanded metal is also reduced, so that expanded metal cannot be used in many areas. Ultimately, the material widening achieved with expanded metal is often not sufficient.

It is an object of the present invention to design a flat metal element of the type mentioned at the outset in such a way that the openings are formed without loss of material, with essentially no stresses being supposed to be present within the material. Furthermore, the metal element should have a high rigidity and compared to the starting material, it should be possible for the material to be widened or expanded.

Starting from a metal element of the type mentioned at the outset, this object is achieved according to the invention in that the central region comprises at least two sections, each consisting of two outer sections and a middle section lying between them, that the outer sections for producing the opening with respect to the middle section are folded over, that the sections form part of the border of the opening, and that the middle region including the sections is formed in one piece with the two edge regions of the metal element.

According to the invention, the openings in the flat metal element are therefore not produced by a stretching process, but rather by folding over partial sections, so that stretching or stretching within the metal element, as is present in expanded metal, is avoided. The folded-over sections are arranged in such a way that the two outer edge regions of the metal element are unfolded during the work step, as a result of which the desired material broadening or expansion is achieved. At the same time, the folding over and the one-piece design of the metal element ensure that the openings in the metal element can be produced in a one-piece manufacturing process and that the desired rigidity and stability are ensured.

According to an advantageous embodiment of the invention, the outer sections are folded in opposite directions to one another, that is to say in opposite directions. In particular, one of the outer sections is at the top of the middle section. Section and the other outer section folded over to the underside of the middle section. The partial sections can be folded over both pointing towards one another and pointing apart.

In principle, it is also possible for the outer partial sections to be folded over in the same direction as one another, that is to say pointing in the same direction. In particular, both outer partial sections are folded over to the same side, that is, both either to the upper side or both to the lower side of the central partial section.

According to a further advantageous embodiment of the invention, a plurality of openings are formed in at least one of the edge regions. This is particularly useful if the flat metal element has an elongated design that extends in the direction of the outer edges, since a corresponding widening of the metal element over its entire length is only possible through the openings. Several openings are advantageously formed in each of the edge regions. These openings are preferably distributed alternately in the two edge areas, with each section with its folded-over outer sections preferably being associated with an opening in the first and a subsequent opening in the second edge area.

According to a further advantageous embodiment of the invention, additional openings are formed in the central area. The perforations formed in the central region are advantageously designed in accordance with the perforations formed in the edge regions. It is thus possible to achieve an additional widening of the metal element in that several according to the invention folded sections are provided one behind the other between the outer edges.

A section is advantageously designed as a web with parallel side edges. In principle, however, the side edges of the section can also run at an angle to one another or, for example, also be curved, as long as the partial sections according to the invention are not prevented from folding over. In particular, at the ends of the sections, surfaces that deviate from the web shape, for example, protrude laterally, can be provided.

According to a further preferred embodiment of the invention, the side edges and the webs run parallel to one another or at an angle to one another. Here, too, the geometry is only limited by the fact that folding over the outer partial sections and thus unfolding the two edge regions is not hindered.

It is achieved by the invention that the distance between the first and the second outer edge with folded-over sections is significantly larger than with non-folded sections. In this way, the desired material broadening is achieved. In particular, it is possible with the invention that the distance with folded-over sections is approximately between 1.3 and 4 times, in particular between 2 and 3 times as large as with non-folded sections. Thus, in the case of metal elements designed according to the invention, the folding according to the invention enables a significantly greater expansion than can be achieved, for example, when using expanded metal.

The perforations are advantageously repeated at regular intervals, both for those formed in the edge areas Breakthroughs as well as for perforations possibly formed in the central area. In principle, the breakthroughs can also be repeated at irregular intervals.

According to a further advantageous embodiment of the invention, the edge regions, with the exception of the openings, have an essentially flat surface. The surface of the metal element, with the exception of the perforations, is also advantageously essentially flat. This can be achieved, for example, in that the material thickenings that are present due to the folding are rolled flat. This additionally results in strain hardening on the bending lines and on the thinly rolled folded sections, so that despite the folding of the material, the rigidity of the folded sections corresponds at least to the rigidity of the starting material. This is particularly important when the sections, for example designed as webs, are made relatively thin, since in this case the work hardening ensures high rigidity of the entire metal element despite these thin connection points between the two edge regions.

According to a further advantageous embodiment of the invention, the folded-over outer partial sections each close an angle of approximately 110 ° to 0 °, preferably of approximately 90 ° to 0 °, advantageously of approximately 45 ° to 0 °, in particular with the central partial section from 10 ° to 0 °. To produce a flat, widened metal element, the outer sections are completely folded over so that they enclose an angle of approximately 0 ° with the middle section. In principle, however, it is also possible that the folding process is not carried out until it is completely folded over, so that three-dimensional Let le structures be created. These can be used, for example, in the production of composite materials, filters or the like.

According to a further advantageous embodiment of the invention, each of the folded-over outer partial sections, which is connected directly to an edge region, merges continuously, in particular precisely into the edge region connected to it. As a result, a smooth or flat surface of the metal element is achieved in this area without edges, bends or the like.

According to a further preferred embodiment of the invention, a further metal section adjoins the first and / or the second outer edge, which together with the material extending between the first and the second outer edge forms an angle profile. In particular, the angle profile can be L-shaped, V-shaped, U-shaped, C-shaped or Z-shaped. With this design, the flat metal element can easily be used to form a profile. The one or more metal sections can either be formed over the entire surface or, if desired, can also be interspersed with openings according to the invention. If, for example, a plaster profile is to be produced, the angle profile is advantageously L-shaped, both legs of the profile preferably being provided with openings according to the invention. If, however, the angle profile is, for example, a stand profile, then a C-shaped, U-shaped, T-shaped, I-shaped or Z-shaped design is advantageous, the openings only in the central base part, but not in the outside legs are present. If necessary, the openings can also be formed directly in the bending lines of the angle profiles or only in one or more legs. In principle, the metal element according to the invention can be used wherever flat metal sections are used, for example in all types of open or closed metal profiles, such as, for example, also tubular profiles.

The further metal section or the further metal sections are preferably formed in one piece with the remaining part of the metal element, in order in this way to maintain the one-step manufacturing process.

According to a further preferred embodiment of the invention, in addition to the first and second edge regions, a third and a fourth edge region are present which lie opposite one another and each extend transversely, in particular perpendicularly to the first or second edge region. The formation of the surface of the material web in a direction from the third to the fourth edge region essentially corresponds to the formation of the surface in a direction from the first to the second edge region. In this way, a widening of the material is possible not only in one direction, in particular transverse to the longitudinal extension of the metal element, but for example in two directions lying perpendicular to one another, for example one longitudinally to the longitudinal extension and one transverse to the longitudinal extension of the metal element. In this embodiment, a two-dimensional expansion and material broadening is thus achieved.

The metal element according to the invention can be used in a variety of ways.

For example, the metal element can be used as a profile element, in particular as a corner or upright profile, as a protective grille, as a fence section, as a filter mat, as a soundproofing element, as a trellis, as a tread element, as a reinforcement mat, as an insert in composite materials, as a cable duct, as a perforated band, as an assembly, Acoustic or shading element or as Decorative profile can be used. It is possible in each case that the corresponding elements are formed entirely by the metal element according to the invention or, as already described, that further metal sections are connected to the metal element containing the openings.

In principle, the invention can be used in all areas in which flat materials are perforated, perforated or punched in order to achieve, for example, permeability or partial permeability or directional reflection for light, sound or fluids. With the invention it is achieved that, unlike for example in the case of a perforation, no material waste arises in the production of the perforations and thus costs can be reduced. Further areas of application can be: Use with wire glass, sandwich floors, packaging insulation material, ceiling hangers, cable support systems, catalyst plates, cable routing systems, perforated plates, perforated strips, assembly strips, mounting brackets, shelf supports, panicle strips, roller shutter profiles, post supports, profile strips, rail systems, slotted strips, strut connectors, DIN rails or network production.

Typical thicknesses of the material webs used are between approximately 0.3 mm to 2 mm, in particular between approximately 0.4 mm and 0.8 mm. Aluminum, zinc sheet, stainless steel or galvanized sheet steel can be used as the material. However, the invention is not limited to these thickness values or materials.

Further advantageous embodiments are specified in the subclaims. The invention is described in more detail below using exemplary embodiments with reference to the figures; in these show:

1 shows a pattern with which a metal element according to the invention can be produced,

2-4 three different states during the production of a metal element designed according to the invention according to the cutting pattern according to FIG. 1,

5 shows a further pattern for producing a metal element designed according to the invention,

6 - 8 three method steps for producing a metal element designed according to the invention according to a cutting pattern according to FIG. 5,

9 shows a further pattern,

10 - 12 three process steps for producing a metal element designed according to the invention according to the cutting pattern according to FIG. 9,

13 - 15 three alternative process steps in the manufacture of the metal element designed according to the invention according to the

9,

16 shows a further pattern, 17 shows a metal element designed according to the invention, which was produced according to the cutting pattern according to FIG. 16,

18 shows a further pattern,

19-21 three process steps for producing a metal element designed according to the invention according to the cutting pattern according to FIG. 18,

22 further variants of different cutting patterns,

Fig. 23 is a schematic representation of a corner profile according to the

Invention and

24 shows a schematic representation of a stand profile designed according to the invention.

1 shows an elongated material web 1, in particular a metal sheet, into which slots 2, 3 running in a meandering shape are cut. The slots 2, 3 can for example by punching or

Cutting processes (e.g. rotary cutting processes, laser cutting processes) or another suitable process can be introduced into the material web 1.

The slots 2, 3 are each U-shaped, the two legs 4, 5 diverge towards the open side of the U.

The legs 4 as well as the legs 5 are each connected to one another by linear base cuts 6, 7, which are each arranged parallel to one another. The U-shaped slots 2 are each at the same height, one after the other periodically in succession along the longitudinal axis of the material web 1. Likewise, the U-shaped slots 3 lie one after the other at uniform intervals along the longitudinal axis of the material web 1, but the open sides of the U-shaped slots 2 and 3 point to the respective other outer edge 8, 9 of the material web 1. The U-shaped slots 2, 3 are arranged so that they interlock so that the legs 4, 5 each overlap and webs 10, 11 are formed between the legs 4, 5.

The material web 1 has a surface 13 with a width 12 which extends from the outer edge 8 to the outer edge 9.

According to FIGS. 2 to 4, a folding process is used to produce a metal element designed according to the invention on the basis of the cutting pattern according to FIG. 1. For this purpose, the edge sections of the material web 1 are moved apart in opposite directions according to arrows 14, 15 in such a way that the webs 10, 11 are each bent at two fold lines 16, 17 and 18, 19, respectively. When the material web 1 is pulled apart further along the arrows 14, 15, the two halves 20, 21 of the material web 1, which are connected to one another by the webs 10, 11, move apart in a pivoting movement until, after complete pivoting, they move into the positions shown in FIG. 4 get to where they are essentially in the same plane.

After the complete pivoting and the resulting pulling apart of the halves 20, 21 of the material web 1, openings 22, 23 are formed therein, as can be seen from FIG. 4. Filling the openings 22, 23 before pulling apart Material forms corresponding projections 24, 25, which are each connected to one another via two of the webs 10, 11 and, compared to the initial state, are displaced relative to one another by twice the web length in the pull-out direction. The shape of the projections 24, 25 is, except for the web areas, complementary to the shape of the openings 22, 23.

As a result of the expansion process, the width 12 of the material web 1 has increased by twice the web length to the width 12 '. In this case, essentially no stretching or bending stresses occur in the material of the material web 1 during the expansion or folding process. The fold only causes the material to bend directly in the fold lines 16, 17, 18, 19. The material expansion is negligible compared to the increase in area.

In the end position shown in FIG. 4, the material web 1 has a first edge region 26 adjoining the outer edge 8, a second edge region 27 adjoining the second outer edge 9, and a central region 28 lying between the two edge regions 26, 27, through which the the two edge regions 26, 27 are connected to one another.

The central region 28 comprises four sections 29, 30 shown in broken lines, each of these sections 29, 30 consisting of three subsections 31, 32, 33 and 34, 35, 36, respectively. For clarification, the outer sections 31, 33 of section 29 are hatched in opposite directions obliquely to the intermediate section 32 between them. Similarly, the outer sections 34 and 36 of the sections 30 are hatched transversely, while the intermediate section 35 lying therebetween is hatched in relation to the longitudinal direction of the material web 1. As can be seen from FIG. 4, the outer sections 31, 33, 34, 36 are folded over in opposite directions with respect to the middle sections 32, 35 in such a way that the outer sections 31, 34 are on the upper side of the middle sections 32, 35 and the outer sections 33, 36 rest on the underside of the middle sections 32, 35.

It is pointed out here that the term “external” partial sections does not necessarily mean that these partial sections are closer to one of the outer edges 8, 9 than the central partial sections, but that this term divides the sections 29, 30 into three Describes sub-sections, the "outer" sub-sections being the sub-sections which are connected to one another by a common intermediate section lying between them.

In order to obtain a surface 13 that is as smooth as possible, the material web 1 can be passed through a rolling device after the folding process has ended. The three-layer material in the central region 28 is pressed together by a correspondingly high pressure during the rolling process, at the same time resulting in a strain hardening of the material. The rolling process thus produces, on the one hand, a largely flat surface 13 and, on the other hand, an increased stability of the material web 1 also in the area of the fold lines 16, 17, 18, 19 and the relatively thin webs 10, 11, which form the middle sections 32, 35 form, achieved.

The exemplary embodiment shown in FIGS. 5 to 8 essentially corresponds to the exemplary embodiment described for FIGS. 1 to 4, see above that the same reference numerals as in Figs. 1 to 4 are used for the same elements.

The exemplary embodiment according to FIGS. 5 to 8 differs from the exemplary embodiment according to FIGS. 1 to 4 only in that two further obliquely extending slots 37, 38 are each provided between the U-shaped slots 2, 3. Because of these further slots 37, 38, two webs 10, 10 'and 11, 11 ", which lie one behind the other parallel to the direction of expansion according to the arrows 14, 15, are formed.

The folding process is identical to the folding process described for FIGS. 2 to 4. An advantage of the embodiment according to FIGS. 5 to 8 is that the additional webs 10 ', 11' give the expanded material web 1 even greater stability.

8 that the central region 28 also has twice the number of sections 29, 30 and twice the number of sections 31 to 36 due to the double number of webs 10, 10 ', 11, 11'.

9 shows an embodiment in which, instead of the U-shaped slots 2, 3, V-shaped slots 37, 38 are cut into the material web 1. Similar to the U-shaped slots 2, 3, the V-shaped slots 37, 38 are also arranged next to one another and offset from one another in the longitudinal direction of the material web 1. The V-shaped slots 37, 38 have legs 39, 40 which overlap one another so that webs 10, 11 are in turn formed between the legs 39, 40. The material web 1 is moved apart according to FIGS. 10 to 12 in the same way as already described for FIGS. 2 to 4 along two arrows 14, 15, so that the width 12 of the material web 1 to an enlarged width 12 after completion of the folding process 'is being expanded.

In the folding process shown in FIGS. 10 to 12, the webs 10, 11 are folded over along the fold lines 16, 17, 18, 19 as in FIGS. 2 to 4, so that due to the V-shaped configuration of the slots 37, 38 the lugs 24, 25 have triangular tips 41, 42. In the folding process illustrated in FIGS. 10 to 12, these lie in one plane with the shoulders 24, 25 and each form the outer sections 31, 33, 34, 36.

In contrast to this, in the folding process shown in FIGS. 13 to 15, the triangular tips 41, 42 together with the webs 10, 11 are folded down along fold lines 43, 44. Except for this changed guidance of the fold lines 43, 44, the folding process shown in FIGS. 13 to 15 is identical to the folding process shown in FIGS. 10 to 12.

The resulting width 12 'of the material web 1 is identical in both cases, with the folding described for FIGS. 13 to 15 only the number of fold lines 43, 44 is reduced.

As already described for the embodiment according to FIGS. 1 to 4, in the embodiments according to FIGS. 5 to 15 the material web 1 can also be fed to a smoothing device after the complete folding, with which the multilayer material sections are pressed together. 1 and 4, FIGS. 5 to 8, FIGS. 9 to 12 and also FIGS. 13 to 15, the crease lines on both sides of the central region 28 were chosen in an identical manner, it is in principle also possible, for example, to select the crease lines on one side of the central region 28 according to the embodiment according to FIGS. 10 to 12 and on the other side of the central region 28 according to the embodiment according to FIGS. 13 to 15. The same also applies to embodiments which do not have V-shaped slots 37, 38 but, for example, U-shaped slots or other slot shapes. In this case, the folded sections would not be folded in opposite directions, but in the same direction.

In relation to the embodiments according to FIGS. 9 to 15, this would mean that on one side of the central region 28, the triangular tips 41, as shown in FIG. 12, are folded over with respect to the webs 10, 11, while the opposite triangular tips 42, 15, form continuous extensions of the webs 10, 11.

In the embodiments in which the bending lines of two mutually adjacent outer sections are separated from one another (see, for example, FIGS. 1-8, 10-12, 19-21), it is also possible for the two mutually adjacent outer sections to be opposite theirs respective middle sections are folded in opposite directions. In the exemplary embodiment according to FIG. 4, this would mean, for example, that the section 29 is folded as shown, whereas in the section 30 the outer section 34 is not above, as shown in FIG. 4, but below the middle section 35. Accordingly, the outer section 36 would not lie below, but above the middle section 35. These different folding directions can be regular, for example alternate or occur irregularly. The bending stiffness of the metal element can be improved by these sections folded against one another.

The bending stiffness can also be increased in that sections 29, 30 which follow one another over the length of the metal element are not arranged exclusively along a straight line, in particular in the longitudinal direction of the metal element, but rather that at least some sections 29, 30 are arranged laterally offset from one another. While all sections 29, 30 follow one another in a straight line in the exemplary embodiment according to FIG. 4, in the exemplary embodiment according to FIG. 8 the sections 29, 30 which are respectively closer to the outer edge 8 are compared to the sections 29, 30 which are closer to the outer edge 9 8 laterally offset, so that the exemplary embodiment according to FIG. 8 has greater flexural rigidity than that according to FIG. 4. It would also be possible, for example, for the exemplary embodiment according to FIG. 4 to offset the sections 29 laterally with respect to the sections 30 or one at a time Stagger a pair of sections 29, 30 laterally with respect to the next pair of sections 29, 30 in order to achieve increased bending rigidity.

FIG. 16 shows the cutting pattern according to FIG. 9, a plurality of such interlocking V-shaped slots being provided instead of a single double row of V-shaped slots 37, 38.

With such a stringing together of V-shaped slots 37, 38, the structure according to the invention shown in FIG. 17 ultimately results after the expansion of the material web, wherein for simplification only one configuration with two adjacent double rows of V-shaped slots 37, 38 is shown , Similar to FIGS. 5 to 8, there are several webs 10, 10 ', 10, 10 "or 11, 11', 11, 11" in the expansion direction, namely in this case three webs 10 one behind the other. It is worth mentioning that in this case the respective middle webs 10 'or 11' forms a folded-over, outer section for the webs 10 and 10 "or 11 and 11" forming a middle section.

18 shows a sectional pattern which enables the material web 1 to expand both along the arrows 14, 15 and at the same time both along the arrows 45, 46. With this pattern, material expansion is not only possible along one axis, but along two perpendicular axes.

In this case, in addition to webs 10, 10 ', 11, 11', which extend one behind the other between the outer edges 8, 9, webs 47, 47 ', 48, 48' arranged perpendicular to these webs are also formed, as shown in FIG 19 to 21 can be seen. 18, these webs are formed by the overlaps of cross-shaped slots 49, 50.

Further possible cutting patterns are shown in FIG. 22. In this case, as in the cutting patterns shown, all the pointed edges can also be replaced, for example, by appropriate curves. Furthermore, multiple staggering, as shown, for example, in FIG. 5 in contrast to FIG. 1, is also possible with the cutting patterns according to FIG. 22. A parallel arrangement of several basic patterns parallel to one another, as shown, for example, in FIG. 16 in comparison to FIG. 9, is also possible with the cutting pattern according to FIG. 22. A common feature of all patterns is that the crease lines created during the folding process are always perpendicular to the direction of expansion.

Finally, two application examples of the invention are shown in FIGS. 23 and 24.

Fig. 23 shows schematically a corner profile 51, as used for example as a plaster profile. The corner profile 51 is designed as an L-shaped angle profile, both legs of the angle-shaped corner profile 51 being provided with openings 22, 23 according to the invention. The openings 22, 23 ensure that the plaster used for plastering the corner profile 51 can pass through the corner profile 51 and thus secure fastening of the corner profile 51 is ensured.

By designing the corner profile 51 according to the invention by means of a metal element expanded according to the invention, the material required for producing the corner profile is simultaneously reduced and the required rigidity of the corner profile is ensured.

24 shows two upright profiles 52, each of which is designed as a C-shaped angle profile. While the two legs 53, 54, to which, for example, a plate 55 is fastened with screws 56, are designed in the usual way as solid material, the two base sections 57 of the stand profiles 52 are produced as metal elements designed according to the invention and are provided with the corresponding openings 22, 23 , In this way it is ensured that the material consumption for the production of the stand profiles 53 is significantly reduced compared to conventional methods. LIST OF REFERENCE NUMBERS

1 web of material

2 slots

3 slots

4 legs

5 legs

6 basic cuts

7 basic cuts

8 outer edge

9 outer edge

10, 10 'bridges ιι, ir bridges

12, 12 'width

13 surface

14 arrow

15 arrow

16 crease line

17 crease line

18 crease line

19 crease line

20 half of the material web 1

21 half of the material web 1

22 breakthroughs

23 breakthroughs

24 approaches 5 approaches 6 edge area 7 edge area 8 middle area sections

Sections outside sections middle sections outside sections outside sections middle sections outside sections

V-shaped slots

leg

Thigh triangular tip triangular tip

fold line

arrow

Arrow, 47 'bars, 48' bars

slots

Corner profile

upright profile

leg

plate

screw

base section

Claims

Expectations :

1. Flat metal element with a surface (13) which extends from a first outer edge (8) to a second outer edge (9) opposite the first outer edge (8), the area adjoining the first outer edge (8) of the metal element forms a first edge area (26) and the area of the metal element adjoining the second outer edge (9) forms a second edge area (27), both of which are connected to one another by an intermediate area (28), and at least in at least one completely bordered opening (22, 23) is formed in one of the border areas (26, 27), the border of which is partly formed by this border area (26, 27) and partly by the central area (28), characterized in that that the central region (28) comprises at least two sections (29, 30), each consisting of two outer sections (31, 33, 34, 36) and one between them In the middle section (32, 35), the outer sections (31, 33, 34, 36) are folded over to produce the opening (22, 23) with respect to the middle section (32, 35), so that the sections (29 , 30) form part of the border of the opening (22, 23), and that the central region (28) including the sections (29, 30) is formed in one piece with the two edge regions (26, 27) of the metal element.

2. Metal element according to claim 1, characterized in that at least a part of the outer partial sections (31, 33, 34, 36) in opposite directions to one another, ie folded over in opposite directions.

3. Metal element according to claim 2, characterized in that one of the outer sections (31, 34) to the top of the middle section (32, 35) and the other outside section (33, 36) to the bottom of the middle section (32, 35) is folded over.

4.Metal element according to one of the preceding claims, characterized in that at least a part of the outer partial sections are in the same direction to one another, i.e. folded in the same direction.

5.Metal element according to claim 4, characterized in that both outer sections are on the same side, i. E. both are folded over either to the top or both to the bottom of the central section.

6. Metal element according to one of the preceding claims, characterized in that a plurality of perforations (22, 23) are formed in at least one of the edge regions (26, 27).

7. Metal element according to claim 6, characterized in that a plurality of openings (22, 23) are formed in each of the edge regions (26, 27).

8. Metal element according to one of the preceding claims, characterized in that additional openings are formed in the central region (28).

9. Metal element according to claim 8, characterized in that the openings formed in the central region (28) are designed in accordance with the openings (22, 23) formed in the edge regions (26, 27).

10. Metal element according to one of the preceding claims, characterized in that a section (29, 30) is designed as a web (10, 10 ', 10 ", 11, 11', 11") with parallel side edges.

11. Metal element according to one of the preceding claims, characterized in that the side edges of different webs (10, 10 ', 10 ", 11, 11', 11") run parallel to one another or at an angle to one another.

12. Metal element according to one of the preceding claims, characterized in that the distance (12, 12 ') between the first and the second outer edge (8, 9) with folded-over sections (31, 33, 34, 36) is significantly larger than with not folded sections (31, 33, 34, 36).

13. Metal element according to claim 12, characterized in that the distance (12 ') with folded-over sections (31, 33, 34, 36) is approximately between 1.3 and 4 times, in particular approximately between 2 and 3

Is as large as the distance (12) with non-folded sections (31, 33, 34, 36).

14. Metal element according to one of the preceding claims, characterized in that the openings (22, 23) are repeated at regular intervals.

15. Metal element according to one of the preceding claims, characterized in that the material of the metal element is essentially unstretched, i. E. the material is not stretched to produce the opening.

16. Metal element according to one of the preceding claims, characterized in that the edge regions (26, 27), with the exception of the perforations (22, 23), have a substantially flat surface (13).

17. Metal element according to one of the preceding claims, characterized in that the surface (13) of the metal element with the exception of the openings (22, 23) is substantially flat.

18. Metal element according to one of the preceding claims, characterized in that the folded outer sections (31, 33, 34, 36) with the central section (32, 35) each have an angle of approximately 110 ° to 0 °, preferably of approx. 90 ° to 0 °, advantageous from approx.

Include 45 ° to 0 °, especially from approx. 10 ° to 0 °.

19. Metal element according to one of the preceding claims, characterized in that each of the folded outer partial sections (31, 33,

34, 36), which is connected directly to an edge region (26, 27), merges continuously, in particular flatly into the edge region (26, 27) connected to it.

20. Metal element according to one of the preceding claims, characterized in that a further metal section (53, 54) adjoins the first and / or the second outer edge (8, 9), which together with the between the first and the second outer edge (8, 9) extending material forms an angle profile (51, 52).

21. Metal element according to claim 20, characterized in that the angular profile (51, 52) is L-shaped, V-shaped, U-shaped, C-shaped, T-shaped, I-shaped or Z-shaped.

22. Metal element according to one of claims 20 or 21, characterized in that the further metal section (53, 54) or the further metal sections cuts is integrally formed with the remaining part of the metal element.

23. Metal element according to one of the preceding claims, characterized in that in addition to the first and second edge regions (26, 27) there are a third and a fourth edge region which lie opposite one another and are each transverse, in particular perpendicular to the first and second edge regions (26, 27), and that the formation of the surface (13) in a direction from the third to the fourth edge region essentially the formation of the surface (13) in a direction from the first to the second edge region (26, 27) equivalent.

24. Metal element according to one of the preceding claims, characterized in that in order to increase the bending rigidity over the length of the metal element successive sections (29, 30) are not arranged exclusively along a straight line, in particular in the longitudinal direction of the metal element, but that at least some sections (29, 30) are laterally offset from one another.

25. Use of a metal element according to one of the preceding claims as a profile element (51, 52), in particular as a corner or stand profiles, as a protective grille, as a fence section, as a filter mat, as a soundproofing element, as a trellis structure, as a tread element, as a reinforcement mat, as an insert in composite materials , as a cable duct, as a perforated tape, as a mounting element or as a decorative profile.