WO2013014044A1

WO2013014044A1 - Method for producing a profiled rail

Info

Publication number: WO2013014044A1
Application number: PCT/EP2012/064091
Authority: WO
Inventors: Christof Maisch
Original assignee: Protektorwerk Florenz Maisch Gmbh & Co. Kg
Priority date: 2011-07-27
Filing date: 2012-07-18
Publication date: 2013-01-31
Also published as: DE102011108675A1; TW201313999A

Abstract

The invention relates to a method for producing a profiled rail for supporting plate-shaped elements (7), in particular for the lay-in installation of ceiling panels for grid ceilings. The profiled rail comprises an elongated web (29) and a bottom chord (28), which is arranged along a longitudinal edge (20) of the web (29) and comprises two bottom chord sections (26, 27) that each extend away from the web (29) essentially in opposite directions. One of the bottom chord sections (26) has a first longitudinal edge (33), which has several interruptions and is located on the outside, and the other bottom chord section (27) has a second longitudinal edge (16), which is essentially continuous and is located on the outside. In the method, the lower face of the bottom chord (28) facing away from the web (29) is provided with an elongated facing plate (32). A first longitudinal edge (35) of the facing plate (32) is bent, for example crimped over or flanged, before being applied to the bottom cord (28). Subsequently, the facing plate (32) is applied to the lower face of the bottom chord (28) such that the bent first longitudinal edge (35) of the facing plate (32) encloses the first longitudinal edge (33) of the bottom chord (28). The second longitudinal edge (38) of the facing plate (32) located opposite the first longitudinal edge (35) is then bent around the second longitudinal edge (16) of the bottom chord (28).

Description

METHOD FOR PRODUCING A PROFILE RAIL

The present invention relates to a method for producing a profile rail for supporting plate-shaped elements, in particular for the insert mounting of ceiling panels for grid ceilings, wherein the rail comprises an elongate web and a lower flange, which is arranged along a longitudinal edge of the web and two each of the bottom web substantially in opposite directions extending Untergurtabschnitte comprises, wherein one of the Untergurtabschnitte a multi-interrupted, outer first longitudinal edge and the other Untergurtabschnitt comprises a substantially continuous, outer second longitudinal edge, in which facing away from the web underside of the lower chord with an elongated screen is provided.

A method for producing such a profile rail is e.g. in EP 1 631 728 B1. In this document is described that the screen, by which a clean optical termination of the rail is reached down, for example, can be folded onto the bottom flange. In this case, the outer longitudinal edges of the lower chord are covered by the screen, whereby an additional stabilization of the lower chord is achieved.

However, since one of the longitudinal edges of the lower belt is interrupted several times, the bending of the longitudinal edges of the screen results in the problem that the screen during rolling an undesirable ripple can receive. Since the screen, which can usually be coated in addition to form a visually appealing end surface of the rail down, such ripple is often unacceptable.

The present invention is therefore based on the object of specifying a method for producing a rail of the type mentioned, in which the screen can be applied in a simple manner on the lower flange, that despite the multiple interrupted, lying out first longitudinal edge ripple the applied on the lower flange screen is avoided.

Based on a method of the type mentioned above, this object is achieved in that a first longitudinal edge of the screen is bent before application to the lower flange, for example, folded or flanged that then the screen is applied to the underside of the lower belt, that the bent first longitudinal edge of the screen comprises the first longitudinal edge of the lower chord, and then that the first longitudinal edge opposite the second longitudinal edge of the screen is bent around the second longitudinal edge of the lower chord.

According to the invention thus the screen is prepared before the actual application to the lower flange by a first longitudinal edge of the screen is bent. In this bending the screen is not yet in connection with the lower flange and thus not with the multiple interrupted, outer first longitudinal edge of the lower belt. The deflection of the first longitudinal edge of the screen can thus be done on a flat surface, so that a ripple is avoided when bending the first longitudinal edge. Subsequently, the screen is applied to the underside of the lower belt, that the prepared bent first longitudinal edge of the screen comprises the first longitudinal edge of the lower belt, ie the longitudinal edge with the multiple interruptions. The screen can for example be pushed laterally on the lower belt or plugged. In this application process, the screen is not loaded in the direction of the downwardly facing surface of the screen, so that the multi-interrupted longitudinal edge of the lower belt or the openings arranged between them, have no negative effect on the flat surface of the screen and thus have an undesirable ripple Screen is avoided when applying.

Subsequently, the first longitudinal edge opposite the second longitudinal edge of the screen is bent around the second longitudinal edge of the lower chord around. Since the second longitudinal edge of the lower chord is substantially continuous, no undesired waviness arises here when the second longitudinal edge of the sheath is bent, since the bending can take place around a continuous, straight edge.

According to an advantageous embodiment of the invention, the first longitudinal edge of the screen is bent so far that the first longitudinal edge of the lower belt is clamped when applying the screen between the bent first longitudinal edge of the screen and a main portion of the screen. In particular, the first longitudinal edge of the screen can be bent over between about 180 ° and about 270 °. The first longitudinal edge is thus bent so far that the distance between the bent free longitudinal edge and the flat main part of the screen is just so large that it substantially corresponds to the thickness of the Untergurtmaterials or is slightly smaller. This will when applying the screen already automatically achieved a one-sided attachment of the screen on the lower flange.

The second longitudinal edge of the screen can be bent between about 180 ° and about 270 °. In a bending around 270 ° is achieved by the approximately 90 ° to the top of the lower belt upstanding longitudinal edge of the screen a claw of the longitudinal edge of the screen in the top of the lower belt and thus a particularly secure connection.

In principle, it is possible that the bent over the first longitudinal edge and / or the bent over the second longitudinal edge of the screen after the application of the screen. However, in particular with respect to the first longitudinal edge of this rolling may be done only so carefully that no unwanted waviness of the screen is formed.

Such re-rolling is usually not necessary, in particular in the region of the first longitudinal edge, since, due to the prefabricated bending of the first longitudinal edge of the screen, this edge can be optimally formed even before the screen is applied to the bottom flange.

Advantageously, the screen can be additionally glued to the underside of the lower belt. As a result, the attachment of the screen to the lower flange can be further increased.

According to a further advantageous embodiment of the invention, an elongated strip of material, in particular a metal or sheet metal strip, is provided with a plurality of elongated incisions for producing the profile rail, wherein the two free ends of the cuts each on a substantially parallel to the longitudinal axis of the Materi- Alstreif ens extending, forming a bend line lines are arranged, and wherein the strip of material is bent along this bend line. As a result of the bending operation, the material sections of the web bordered by the cut lines fold out of the latter and thus form one half of the lower belt of the profiled rail (referred to below as the lower belt section), this lower belt section consisting of a multiplicity of material sections spaced apart in the longitudinal direction. The bent at the same time by the bending operation in the opposite direction part of the web forms the second Untergurtabschnitt, which is integrally formed over its entire length. Thus, in a single bending operation and thus in a single step, the web and the lower flange are formed in its final shape.

At the same time openings are formed in the web, which can serve as predetermined kinks in case of fire.

Preferably, the incisions are U-shaped, in particular with a rectilinear base and preferably perpendicular thereto straight legs, or trapezoidal. The height of the incisions, ie in each case the vertical distance from the bending line to the farthest point of the respective incision, is preferably substantially equal. This ensures that all folded-out material sections have the same height and thus the lower belt section formed from these material sections has a uniform width, except for the material-free areas lying between the material sections. Furthermore, the height of the incisions may preferably be substantially equal to the distance between the bending line and the longitudinal edge of the material strip, so that the two lower belt sections forming the lower belt are arranged substantially equidistant and symmetrical with respect to the web. Preferably, the incisions are each on generated on the same side of the bend line. Advantageously, the strip of material is bent by about 90 ° to produce in this way a T-profile.

The cuts can preferably be produced by a rotary or laser cutting method, by a punching process or else by any other suitable method.

Further advantageous embodiments are specified in the subclaims.

The invention will be described in more detail below with reference to an embodiment with reference to the drawings; in these show:

1 is a perspective view of a frame construction with T-profile rails according to the prior art for forming a grid ceiling,

2 is a plan view of a metal strip with cutting lines to form a T-profile rail,

3 is a perspective view of a rail after an intermediate step of the invention ausgebil Deten manufacturing process, Fig. 4 is a prepared screen,

5 shows a cross section through the rail of FIG. 3,

6 shows a cross section through the profile rail of FIG. 3 with partially applied screen, 7 shows a cross section through the profiled rail according to FIG. 3 with a completely applied screen, FIG. 8 shows a perspective view of the profile rail according to FIG

Fig. 3 with fully applied screen and

Fig. 9 shows a cross section through the rail of FIG. 3 with a second embodiment of a screen.

Fig. 1 shows a frame structure 1, which consists of a plurality of parallel and perpendicular thereto extending rails 2.

The profiled rails 2 have a T-shaped cross section, with an elongate web 3 and a lower flange 4 adjoining its lower longitudinal edge. The lower flange 4 consists of two folds of the web 3 outwards, through the two lower flange sections 5, 6 are formed, the bearing surfaces for plate-shaped elements 7, for example, cover plates form.

The rails 2 have on their upper longitudinal side a top flange 8, which is designed as a hollow profile and for coupling the rails 2 on suspension elements 9, 10 is used. Fig. 2 shows a plan view of a sheet metal strip 1 1, as he can form the starting point for the production of a rail according to the inventive method.

In the sheet metal strip 1 1, a plurality of elongated, U-shaped notches 12 are provided, each consisting of three rectilinear Partial incisions 13, 14, 15 exist, which are perpendicular to each other. The part of cuts 14 extend parallel to one of the longitudinal edges 16 of the sheet metal strip 1 1. The free ends 17, 18 of the incisions 12 are each on a parallel to the longitudinal axis 19 of the sheet metal strip 1 1 extending, forming a bending line 20 straight.

The height 21 of the incisions 12 is substantially equal in size and substantially equal to the distance 22 between the bending line 20 and the longitudinal edge 16 of the sheet metal strip 1 1. Furthermore, the U-shaped incisions 12 are substantially the same width and each have the same Width as the lying between the incisions 12 material portions 36th

To form the rail, the sheet metal strip 1 1 is folded along the bending line 20 so that the framed by the incisions 12 material portions 23 of the sheet metal strip 1 1 out of the plane and the arranged between the bending line 20 and the longitudinal edge 16 strip-shaped portion 24 in the plane is folded into it, so that the base body 25 shown in Fig. 3 of the rail is formed.

As can be seen from FIG. 3, after the folding operation, the strip-shaped section 24 and the material sections 23 form lower belt sections 26, 27 of a lower belt 28, while the remaining region of the sheet metal strip 11, which is substantially perpendicular to the lower belt 28, forms one Bridge 29 of the main body 25 forms. The bending line 20 forms the lower longitudinal edge of the web 29, to which the lower flange 28 with a repeatedly interrupted, first outer longitudinal edge 33 and the continuous second outer longitudinal edge 16 connects.

By folding out the material sections 23, openings 30 are formed in the web 29, which openings are substantially rectangular.

Furthermore, in FIG. 3, additional fastening openings 31 are provided in the web 29 in the form of bores, which are repeated at regular intervals. In addition, two reinforcing beads 37 are formed in the material sections 36 between the openings 30 and are formed by indentations in opposite directions in the surface of the web 29, so that one reinforcing bead protrudes out of the plane of the drawing and the other into it - sticks out. While reinforcement beads 37 are shown in FIG. 3 only in one material section 36, they can also be formed in the remaining material sections 36 or in another area of the web 29 and / or of the lower belt 28. As can also be seen from FIG. 3, the outer one is the first one

Longitudinal edge 33 of the lower belt 28 formed repeatedly interrupted, while the outer second longitudinal edge 16 of the lower belt 28 is continuous straight. This shape of the two longitudinal edges 16, 33 can also be produced in other ways, for example by means of corresponding stampings or other folding or bending methods.

In principle, the lower flange and web can also be composed, for example, of separate sections.

According to the invention, the bottom flange 28 is provided on its underside 34 with a screen 32, as shown in Fig. 4. The screen 32 may be coated at least on its underside and serves to produce a visually appealing, uniform visible surface of the mounted, for example, on a ceiling rail. In order to avoid unwanted ripples of the screen 32 when applied to the bottom flange 28, which may arise, for example, during rolling due to the material-free areas between the material sections 23, the screen 32 is prepared according to the invention prior to application to the bottom 34 of the lower belt 28 by a first longitudinal edge 35 of the screen 32 is bent, as shown in Fig. 4. In contrast to the first longitudinal edge 35, the opposite second longitudinal edge 38 is not yet bent at this time, but remains in its unbent state, as shown in Fig. 4 also.

Starting from the main body 25, as shown in Fig. 5, the screen 32 is then pushed with its bent first longitudinal edge 35 on the broken first longitudinal edge 33 of the lower belt 28 that the bent first longitudinal edge 35 of the screen 32, the broken first Longitudinal edge 33 of the lower belt 28 includes. The result of this intermediate step of the method according to the invention is shown in FIG.

Since in this application, the flat main section 39 of the screen 32 is not pressurized and in particular is not pressed against the material portions 23, there is no risk that unwanted waviness of the screen 32 is formed by corresponding embossing effects.

Subsequently, the second longitudinal edge 38 of the viewing screen 32 is bent around the second longitudinal edge 16 of the lower belt 28, so that ultimately the state shown in FIGS. 7 and 8 is produced, in which the the outer longitudinal edges 16, 33 of the lower chord are each completely covered by the longitudinal edges 35, 38 of the screen 32.

The bending of the second longitudinal edge 38 of the screen 32 is unproblematic, since the second longitudinal edge 16 of the lower belt 28 is formed continuously without interruptions and thus no undesirable waviness of the screen 32 is generated during bending.

While in Fig. 7, the longitudinal edges 35 and 38 of the screen 34 are each bent by approximately 180 °, the bend on one or both edges may also have lower or greater values. For example, as shown in FIG. 9, the bend may be approximately 270 °, so that the bent longitudinal edges 35 ', 38' each rise approximately perpendicular to the upper side 40 of the lower belt 28. As a result, the longitudinal edges 35 ', 38' can engage in the upper side 40 of the lower belt 28, whereby an even more reliable connection between the lower belt 28 and the outer screen 32 is generated.

LIST OF REFERENCE NUMBERS

1 frame construction

2 profile rail

3 footbridge

4 lower flange

5 lower belt section

6 lower belt section

7 plate-shaped elements

8 upper strap

9 suspension elements

10 suspension elements

11 sheet metal strips

12 cuts

13 partial cuts

14 partial cuts

15 partial cuts

16 longitudinal edge

17 free end of the cuts 12

18 free end of the cuts 12

19 longitudinal axis

20 bending line

21 height

22 distance

23 material section

24 strip-shaped section

25 basic body

26 lower belt section

27 lower belt section

28 bottom strap 29 footbridge

30 openings

31 mounting holes

32 screen

33 longitudinal edge

34 Bottom of the screen

35, 35 'first longitudinal edge of the screen

36 material sections

37 reinforcement beads

38, 38 'second longitudinal edge of the screen

39 flat main section

40 top of the screen

Claims

claims

Method for producing a profiled rail for supporting plate-shaped elements (7), in particular for inserting ceiling slabs for grid ceilings, the profiled rail comprising an elongate web (29) and a bottom flange (28) along a longitudinal edge (20) the web (29) is arranged and comprises two Untergurtabschnitte (26, 27) each extending from the web (29) in substantially opposite directions, wherein one of the Untergurtabschnitte (26) has a multi-interrupted, outer first longitudinal edge (33) and the other lower flange section (27) comprises a substantially continuous, outer second longitudinal edge (16), in which the underside of the lower belt (28) facing away from the web (29) is provided with an elongate screen (32),

characterized,

that a first longitudinal edge (35) of the viewing screen (32) is bent over, for example folded over or crimped, before being applied to the lower belt (28),

in that the screen (32) is subsequently applied to the underside of the lower belt (28) such that the bent first longitudinal edge (35) of the screen (32) comprises the first longitudinal edge (33) of the lower belt (28), and

in that subsequently the second longitudinal edge (38) of the viewing screen (32) lying opposite the first longitudinal edge (35) is bent around the second longitudinal edge (16) of the lower belt (28). Method according to claim 1,

characterized,

that the first longitudinal edge (35) of the screen (32) is bent so far that the first longitudinal edge (33) of the lower belt (28) during application of the screen (32) between the bent first longitudinal edge (35) of the screen (32) and a main portion (39) of the screen (32) is clamped.

3. The method according to claim 1 or 2,

characterized,

the first and / or the second longitudinal edge (35, 38) of the viewing screen (32) is bent over between approximately 180 ° and approximately 270 °.

4. The method according to at least one of the preceding claims, characterized

in that the bent-over first longitudinal edge (35) and / or the bent-over second longitudinal edge (38) of the viewing screen (32) is re-rolled after the application of the screen (32).

Method according to at least one of the preceding claims, characterized

that the screen (32) is additionally glued to the underside of the lower belt (28).

Method according to at least one of the preceding claims, characterized

in that an elongate strip of material (1 1), in particular a strip of metal or sheet metal, is provided with a multiplicity of oblong incisions (12), the two free ends (17, 18) of the incisions (12) each being essentially parallel to Longitudinal axis (19) of the material strip (1 1) extending, a bending line (20) forming lines are arranged, and that the strip of material (1 1) along this bending line (20) is bent.

7. The method according to claim 6,

characterized,

in that the notches (12) are U-shaped, in particular with a rectilinear base (14) and preferably straight legs (13, 15) extending perpendicularly thereto, or are trapezoidal in shape.

8. The method according to claim 6 or 7,

characterized,

the incisions (12) are respectively produced on the same side of the bending line (20).

9. The method according to at least one of claims 6 to 8,

characterized,

that the material strip (1 1) is bent by about 90 °.

10. The method according to at least one of claims 6 to 9,

characterized,

the incisions (12) are produced by a rotary or laser cutting method or by a punching process.