ANCHOR RAIL AND METHOD FOR PRODUCING AN ANCHOR RAIL

Abstract

An anchor rail for fixing fasteners includes a first rail part and a second rail part which are connected to one another and on each of which anchor webs are formed, wherein a channel-shaped receptacle for a head section of a fastening means is formed between a first wall of the first rail part and a second wall of the second rail part, and an inwardly projecting web is provided on the first wall and an inwardly projecting web is provided on the second wall, and the inwardly projecting webs overlap the channel-shaped receptacle at the edge side. An outwardly projecting support web projects at least in sections on the first wall and/or the second wall opposite the inwardly projecting web. A method for producing an anchor rail which can absorb particularly high forces includes forming the inwardly and outwardly projecting webs from strip-shaped blanks welded to the first and second rail parts.

Claims

1. An anchor rail (1) for fixing fasteners (20), comprising: a first rail part (2a) and a second rail part (2b), which are connected to one another and on each of which anchor webs (3) are formed, wherein a channel-shaped receptacle (13) for a head section (21) of a fastener (20) is formed between a first wall (8a) of the first rail part (2a) and a second wall (8b) of the second rail part (2b), and an inwardly projecting web (10) is provided on the first wall (8a) and an inwardly projecting web (10) is provided on the second wall (8b), and the inwardly projecting webs (10) overlap the channel-shaped receptacle (13) on an edge side, wherein an outwardly projecting support web (12) projects at least in sections on the first wall (8a) and/or the second wall (8b) opposite the inwardly projecting web (10).

2. The anchor rail according to claim 1, wherein the support web is a continuous, outwardly projecting support web (12) and is provided on each of the first and second walls (8a, 8b).

3. The anchor rail according to claim 1, wherein the first wall (8a), the inwardly projecting web (10) and the outwardly projecting support web (12) are of T-shaped design in cross-section.

4. The anchor rail according to claim 1, wherein the outwardly projecting support web (12) is welded to the first or second wall (8a, 8b).

5. The anchor rail according to claim 1, wherein the outwardly projecting support web (12) is integrally formed with the inwardly projecting web (10).

6. The anchor rail according to claim 5, wherein the outwardly projecting support web (12) and the inwardly projecting web (10) are made thicker than the first and second rail parts (2a, 2b).

7. The anchor rail according to claim 5, wherein the outwardly projecting support web (12) and the inwardly projecting web (10) are formed of a material of higher strength than the first and second rail parts (2a, 2b).

8. The anchor rail according to claim 1, wherein the outwardly projecting support web (12) and the inwardly projecting web (10) are made of a flat steel sheet which is connected to the first or second wall (8a, 8b) in a central region via a welded butt seam (14).

9. The anchor rail according to claim 1, wherein each rail part (2a, 2b) is made of a bent steel sheet.

10. The anchor rail according to claim 1, wherein the first and second rail parts (2a, 2b) are connected to each other via mutually welded connecting webs (6a, 6b).

11. The anchor rail according to claim 1, wherein a toothing (11) is formed on each of the inwardly projecting webs (10).

12. A method for producing an anchor rail (1) for fixing fasteners (20), comprising the following steps: producing two blanks for a first and a second rail part (2a, 2b) with anchor webs (3) from a steel sheet; producing strip-shaped blanks from a steel sheet; welding a first strip-shaped blank to a first wall (8a) of a first rail part (2a); welding a second strip-shaped blank to a second wall (8b) of the second rail part (2b), and connecting the first rail part (2a) to the second rail part (2b), wherein a channel-shaped receptacle (13) for a head section (21) of a fastening means (20) is formed between the first wall (8a) and second wall (8b), wherein each strip-shaped blank forms an inwardly projecting web (10) on the first and second walls (8a, 8b), which covers the receptacle (13) at the edge, and an outwardly projecting support web (12).

13. The method according to claim 12, wherein the welding of the first and second strip-shaped blanks is performed by laser welding.

14. The method according to claim 12, wherein a strip-shaped blank is welded to a front side of each of the first and second walls (8a, 8b) in a central region via a butt seam (14).

Description

[0018] The invention is explained in more detail below by means of an exemplary embodiment with reference to the accompanying drawings, wherein:

[0019] FIGS. 1A and 1B show two views of an anchor rail according to the invention;

[0020] FIG. 2 shows a sectional view through the anchor rail of FIG. 1, and

[0021] FIG. 3 shows a sectional view through the anchor rail of FIG. 1 with a fastening means.

[0022] An anchor rail 1 comprises two rail parts 2a and 2b which are made of a metal sheet, in particular a steel sheet. Integrally formed anchor webs 3 are provided on each rail part 2a and 2b, which have a widened foot section 4 and are later immersed in a cast body, in particular one of concrete.

[0023] A recess 5 is provided at least on one part of the anchor webs 3 in order to use the web-shaped material punched out on three sides at the recess 5 to produce a connecting web 6a or 6b. The connecting webs 6a and 6b are of stepped design at their facing end so that the two rail parts 2a and 2b can be fixed at a predefined distance. The connecting webs 6a and 6b are preferably welded together as described in DE 10 2020 103 568.

[0024] As shown in particular in FIG. 2, there is a wall 8a on the first rail part 2a, and spaced from the first wall 8a a second wall 8b formed integrally with the second rail part 2b. A channel-shaped receptacle 13 for inserting a head section of a fastening means is formed between the two walls 8a and 8b. The channel-shaped receptacle 13 is bounded by the connecting webs 6a and 6b, which are fixed to each other.

[0025] The anchor webs 3 are aligned at an angle to the wall 8a or 8b, preferably by an angle α, which can lie in a range between 5° and 30°. A kink 9 is provided between the anchor bars 3 and the wall 8a or 8b.

[0026] An inwardly projecting web 10 is provided on opposite sides of the channel-shaped receptacle 13. The two inwardly projecting webs 10 cover the edge of the channel-shaped receptacle 13 and leave a slot through which the fastening means with the head section can be inserted into the channel-shaped receptacle 13. A toothing 11 is formed on the inwardly projecting webs 10 in order to be able to fix the fastening means in the longitudinal direction of the anchor rail 1.

[0027] The inwardly projecting webs 10 are not integrally formed with one of the rail parts 2a or 2b, but are made from a strip-shaped blank which also forms an outwardly projecting support web 12. This flat blank is preferably made of a steel sheet which is connected in a central region to an end face of the first wall 8a or the second wall 8b by a welded butt seam 14. The inwardly projecting web 10 and the support web 12 thus protrude from the respective wall 8a or 8b on opposite sides.

[0028] In FIG. 3, the anchor rail 1 is shown with a fastening means 20 in the form of a hammerhead screw. A head section 21 of the fastening means 20 has been inserted into the channel-shaped receptacle 13 and rotated so that the head section 21 engages behind the two inwardly projecting webs 10. A threaded section 22 protrudes from the head section 21 from the anchor rail 1, to which further components can be attached.

[0029] In order to fix the anchor rail 1 precisely in a casting, in particular a concrete body, a retaining bracket 30 is provided, which has a projecting flange 31 on opposite sides in each case, which can be fixed to a formwork component by means of fastening means, for example nails. A bracket-shaped section 32 thereby embraces the channel-shaped receptacle 13, which is surrounded by the walls 8a and 8b and the connecting webs 6a and 6b. The retaining bracket 30 may be designed as described in DE 10 2019 124 308.

[0030] To manufacture the anchor rail 1, two blanks are made from a steel sheet, from which the first and second rail parts with the anchor webs are formed. In addition, strip-shaped blanks are produced from a steel sheet which later form the inner webs 10 and the support webs 12. The steel sheet for the strip-shaped blank can be thicker and/or of higher strength than the steel sheet for the rail parts. For example, the thickness of the strip-shaped blanks may be 20% greater than the thickness of the blanks made of the steel sheet for the rail parts. In particular, the thickness can be more than 0.5 mm, in particular more than 1 mm. Alternatively or additionally, a steel sheet can be selected for the strip-shaped blank which has a higher strength than the steel sheet for producing the rail parts.

[0031] After the blanks have been produced, a first blank is welded to a first wall 8a of the first rail part 2a and a second strip-shaped blank is welded to a second wall 8b of the second rail part 2b. The welding is preferably carried out using a laser welding process, in which the material on the wall 8a or 8b is melted in the area of the contact surface to the strip-shaped blank with or without welding additions. The strip-shaped blank is welded in a central area via a butt seam 14.

[0032] Temporally independent of this welding, the two rail parts 2a and 2b can be welded to each other via the connecting webs 6a and 6b, wherein preferably the rail parts 2a and 2b are manufactured individually with the welded-on blanks, since these can be manufactured identically. After the weld has been produced, the rail parts 2a and 2b can then be welded together via the connecting webs 6a and 6b.

[0033] In the illustrated exemplary embodiment, the connecting webs 6a and 6b are made of material provided by making a recess 5 on the anchor webs 3. It is obviously also possible to connect the rail parts 2a and 2b by connecting webs made from the blank for the rail parts 2a and 2b at a different position. In addition, separate connecting webs made of a different material can also be used to connect the two rail parts 2a and 2b. In a further alternative, the rail parts 2a and 2b can also be manufactured in one piece.

LIST OF REFERENCE SIGNS

[0034] 1 Anchor rail [0035] 2a, 2b Rail part [0036] 3 Anchor web [0037] 4 Foot section [0038] 5 Recess [0039] 6a, 6b Connecting web [0040] 8a, 8b Wall [0041] 9 Kink [0042] 10 Web [0043] 11 Toothing [0044] 12 Support web [0045] 13 Channel-shaped receptacle [0046] 14 Butt seam [0047] 20 Fastening means [0048] 21 Head section [0049] 22 Threaded section [0050] 30 Retaining bracket [0051] 31 Flange [0052] 32 Bracket-shaped section [0053] α Angle