Anchor rail with filler core

Abstract

Anchor rail for arrangement in or on a concrete element in order to fasten one or more building components to the concrete element via the anchor rail, wherein the anchor rail has a cross-sectional profile which forms a receiving space in which a filler core is placed, characterized in that the filler core has a hardness in the range of 15 or 20 Shore-D to 80 or 85 Shore-D and / or is made of wood, in particular hardwood or multi-layer wood, or hard plastic.

Description

[0001] The invention relates to an anchor rail for arrangement in or on a concrete element in order to fasten one or more building components to the concrete element via the anchor rail, wherein the anchor rail has a cross-sectional profile which forms a receiving space in which a filler core is placed. Preferably, the anchor rail is designed with a C- or U-shaped cross-sectional profile and / or a receiving space that is open on one or more sides.

[0002] Anchor rails or anchor plate profiles are commonly used in the form of flat iron bars, with anchor bolts welded to the back for anchoring in concrete. Railing components can also be welded to these. Drilling holes in the steel plate to tap threads is not possible because there is no cavity beneath the steel plate, only concrete.

[0003] In expert report no. 11-143 by IFBT GmbH - Institute for Facade and Fastening Technology, dated October 20, 2011 (accessed September 4, 2024, from https: / / www.bqw-bohr.de / pdf / Gutachten BGWTU Ankerschienen.pdf), the load-bearing behavior of BGWTU anchor rails embedded in concrete for trapezoidal sheet metal fastening with welded anchors is discussed. According to the report, these anchor rails consist of cold-rolled, C-shaped rails with welded-on loops of round steel. The rails are embedded flush with the surface of steel and prestressed concrete elements made of normal concrete and serve to fasten trapezoidal sheets with fasteners. The anchor rails are manufactured from hot-dip galvanized steel with a zinc coating thickness of 0.05 mm and from stainless steel.

[0004] In the applicant's BGW (German Social Accident Insurance Institution for the Energy, Water and Wastewater) complete catalog (accessed on September 4, 2024, at https: / / www.bqw-bohr.de / pdf / Deutsch Gesamt.pdf), a rail is described on page 311 as a trapezoidal sheet metal substructure profile (also called an "anchor plate profile") for installation in precast concrete elements such as columns and beams. This hollow profile has a soft foam core for the subsequent insertion of self-drilling screws. The well-known Halfen HTU-S profile sheet metal fastening rails have a polystyrene filling inside to prevent a self-drilling screw from contacting the concrete (see the company publication "Halfenschienen Produktinformation Technik", page 70, accessed on August 5, 2024, at https: / / www.halfen.com / PDF-Dateien / Druckschriften / Technische%20Produktinformationen / HALFEN B 23-DE.pdf).

[0005] The filler core made of soft foam or polystyrene has the disadvantage that toxic gases or hydrochloric acid can be released quickly in the event of a fire. Furthermore, the polystyrene or soft foam filler core cannot withstand exceptionally strong tensile or shear forces or mechanical stresses, because when the U-profile is pulled, the legs cannot be supported by the soft filling foam or withstand the force.

[0006] The term "anchor rail" is often used by experts to refer to rails with a C-shaped cross-sectional profile. With these C-anchor rails, it is common practice to insert so-called hammerhead bolts (HKS) into the C-profile or the elongated channel it surrounds or forms, regardless of the profile size. These bolts are initially positioned so that they can be moved longitudinally. However, when mounting attachments or components, the orientation of the channel is fixed, which limits application flexibility.

[0007] The object of the present invention is to eliminate disadvantages in the prior art and to create a generic anchor rail with higher functional reliability and safety.

[0008] The problem is solved by the anchor rail specified in claim 1. Advantageous embodiments of this anchor rail are described in the (dependent) subclaims.

[0009] Accordingly, an anchor rail of the type mentioned above according to the invention is characterized by a filler core with a hardness in the range of 15 or 20 Shore D (e.g., spruce wood) to at least 80 Shore D (e.g., coated chipboard) or 85 or more (e.g., cabinet door with 100 Shore D) and / or with wood, in particular hardwood or multi-layer wood, or hard plastic. The hard core in the anchor rail prevents deformation of the anchor rail, especially under tensile forces, and consequently prevents the anchor rail from being pulled out of the concrete. A further advantage achievable due to the hard core according to the invention is that the anchor rail can be manufactured with thinner profile material, for example, thinner sheet metal.While the aforementioned anchor rails with C-profile must be cold- or hot-rolled and hot-dip galvanized in a complex and costly batch process to achieve sufficient strength, this is not necessary for the anchor rail according to the invention.

[0010] Advantageously, the anchor rail according to the invention can be used in combination with self-drilling screws (one or more per anchor rail), which are known per se and available at very low cost, for fastening attachments or building components. Furthermore, when mounting the attachments or building components, the user is no longer limited to a channel for hammerhead screws; rather, the one or more self-drilling screws can be screwed or drilled into the anchor rail at virtually any point.

[0011] A further advantage lies in the improved sound insulation: In the anchor rail according to the invention, the sound is interrupted by the hard core. Furthermore, holes can be drilled into the anchor rail according to the invention with its hard core, threads can be cut, or, in the case of smaller fastenings, self-drilling screws can be inserted.

[0012] Exemplary, advantageous embodiments of the invention are addressed in the dependent claims and are explained in more detail below.

[0013] According to a practical embodiment, the filler core is arranged between two opposing side walls, in particular longitudinal side walls, of the anchor rail. This allows forces acting on the anchor rail, especially transversely to an anchor rail axis, to be better resisted, since the hard filler core largely prevents deformation of the adjacent or adjoining side wall of the anchor rail.

[0014] To increase safety against fire hazards, according to an advantageous embodiment of the invention, the filler core made of wood or hardwood is treated with a special agent known per se to achieve resistance to fire.

[0015] To reinforce the anchoring of the anchor rail in the concrete element, according to a further development of the invention, one or more reinforcement and / or strengthening elements are attached to the anchor rail to reinforce the concrete element and / or to anchor it in the concrete element. This allows the anchor rail to be anchored not only through a targeted anchoring geometry with bracing, angulation, and the like, but also to achieve an additional, earthquake-resistant anchoring.

[0016] Advantageously, the reinforcement and / or strengthening elements are connected to side walls or lateral legs of the anchor rail, which preferably form a C- or U-shaped cross-sectional profile. This contributes to stabilizing the position of the anchor rail in the concrete element both in and across its longitudinal direction. One example of an additional reinforcement element for the anchor rail is the use of a preferably metallic round bar bent in a hairpin shape.

[0017] It increases flexibility in application and handling if, further developing the concept of additional reinforcement, the reinforcement and / or reinforcement elements are mounted in a pivotable, hinged, rotatable, displaceable, or otherwise movable manner. Their mobility or the articulated nature of the arrangement is enhanced if one or more of the reinforcement and / or reinforcement elements are implemented as a single or multiple bent stirrup made of strand-like material and / or as a U- or C-shaped bent bar.

[0018] For the functional attachment of the reinforcement and / or strengthening elements to the anchor rail, it is advantageous if, according to one embodiment of the invention, one or more receiving elements, each assigned to one of the reinforcement and / or strengthening elements, are formed in the anchor rail, particularly in its side walls. These receiving elements can contribute, in particular, to their articulated or otherwise movable attachment. A simple and practical implementation option is to design the receiving element(s) as a passage or opening formed in the anchor rail wall. The passage or opening expediently penetrates the anchor rail wall, especially the side wall. The ends of the reinforcement and / or strengthening element(s), particularly if the ends are bent or angled like hooks, can be easily hooked into the passage(s) or opening(s).

[0019] Alternatively, brackets with a V-shaped profile can be used in connection with the mounting openings or penetrations. For this purpose, the respective V-shaped bracket is inserted through the opening or penetration until the central or apex of the V-shape is located in or immediately adjacent to the opening or penetration. The V-bracket can then be functionally hooked into the side wall of the anchor rail via this central or apex position in or at the opening / penetration.

[0020] Furthermore, according to a further development, the anchor rail according to the invention is provided with at least one snap-in element, which is associated with a reinforcement and / or strengthening element and is designed to lock or secure the movable reinforcement and / or strengthening element in a desired position. This achieves the function that, when the anchor rail is arranged in the concrete element, the additional reinforcement snaps or locks into the desired position and remains fixed there.

[0021] One advantage achievable with the anchor rail according to the invention is that holes can be drilled and threads cut. For smaller fastenings, self-drilling screws can also be used. The existing space under the metal profile of the anchor rail can be reserved and utilized for blind rivets. It is obvious that the holes and threads in the anchor rail can also be pre-drilled and prepared in the concrete before installation.

[0022] For even better anchorage, the anchor rail is designed to interact with undercuts in the concrete. In this context, the additional reinforcement described above can be implemented with one or more elements, each resembling a dowel pin, which can be anchored deep within the concrete element. For this purpose, it is advantageous to provide the anchor rail with receiving holes all around, into which the dowel pins can be inserted.

[0023] Further details, features, feature (sub)combinations, advantages and effects based on the invention will become apparent from the following description of preferred embodiments of the invention and the drawings. These show in Fig. 1 a perspective view of the front and underside of an exemplary embodiment of the anchor rail according to the invention, Fig. 2 a perspective view of the front and underside of the anchor rail according to Fig. 1 without a hard core, Fig. 3 a perspective view of the longitudinal, front and top surfaces of another exemplary embodiment, Fig. 4 a perspective view of the longitudinal, front and top surfaces of another exemplary embodiment in an expanded view, and Fig. 5 a front view of another exemplary embodiment. In the figures the same elements are provided with the same reference numerals.

[0024] According to Fig. 1. The anchor rail 100 is manufactured with a sheet metal housing 110, which has an approximately U-shaped cross-sectional profile. The two U-legs 120 transition into their ends 140 via a respective obtuse-angled outwardly extending angled section 130. The resulting spreading of the two U-legs 120 at their end sections serves to reinforce the anchor rail 100's anchorage in a concrete element. The space between the opposing U-legs 120, or the corresponding anchor rail side walls 160, is used as a receiving space into which a filler core 150 made of wood, in particular hardwood, with a cuboid shape, is inserted, preferably largely flush with the form.The wood filler core 150, preferably with a hardness in the range of 20 Shore-D to 80 Shore-D, forms a mechanical resistance against any deformations of the anchor rail side walls 160 due to externally acting forces, in particular tensile forces.

[0025] According to Fig. 1 Reinforcing stirrups 200 are attached to the opposite anchor rail side walls 160. According to the preferred embodiment shown, U-shaped bent round bars are used to form the reinforcing stirrups 200. As is best done from Fig. As can be seen in Figure 2 (anchor rail shown without wood core), the ends of the U-shaped legs 210 of each reinforcement stirrup 200 are bent inwards at a 90° angle to form a suspension hook 211. The reinforcement stirrups 200 are hinged or pivotally suspended from the outside in the opposite side walls 160 of the anchor rail 100 by means of the suspension hooks 211. For this purpose, the anchor rail side walls 160 are perforated by holes 161 (see also...). Fig. 3), which form receiving elements for hanging the suspension hooks 211 or reinforcement stirrups 210.

[0026] According to Fig. 1 to 3, the receiving elements or wall holes 161 are each arranged in the angled section 130 of the housing U-legs 120 or anchor rail side wall forming the end region, so that the suspended additional reinforcement 200 can extend correspondingly deeper into the associated concrete element and be anchored there. This deep anchorage is further reinforced by the fact that the U-legs of the reinforcement stirrups 200 have a length L (see Fig. 2), which determines the height H of the anchor rail metal housing 110 (see Fig. 3) exceeds. In the embodiments according to Fig. 1-3 The height H of the anchor rail metal housing 110 corresponds approximately to the length of the housing U-legs 120 of the anchor rail 100 (see illustration in Fig. 3).

[0027] The anchor rails according to Fig. 1-3 are each provided with a snap-in element 170 in the area of ​​the wall holes 161, which in the illustrated example are realized as recesses 171 in the narrow side 162 of the longitudinal side wall 160. One such snap-in element 170 or recess 171 is provided for each U-leg 210 of the reinforcing stirrups 200. The snap-in elements 170 enable the pivotably mounted reinforcing stirrups 200 to be locked or secured in a desired angular position. Fig. 1 and Fig. 2. Due to their corresponding angular position, the U-shaped legs 210 of the reinforcing stirrups 200 are positioned outside the recesses 171 and are therefore not engaged. According to Fig. 3. Due to their corresponding angular position, the U-shaped legs 210 are all located in a respective recess of a locking element 170; they are thus locked in place and can only be unlocked from the locking element 170 or the corresponding recess by overcoming a mechanical resistance in order to achieve free pivoting capability.

[0028] The exemplary embodiment according to Fig. 4 differs from that according to Fig. 3. among other things, by the fact that the angular section 130 is not as described above. Fig. 3 is not spread out at an obtuse angle, but rather projects at an angle of approximately 90° relative to the other side wall 160 of the anchor rail. A further difference lies in the attachment of the reinforcing stirrups 200: These are guided by the suspension hooks 211 of their U-shaped legs 210 through the receiving wall holes 161 in the respective angled section 130 in such a way that the right-angled end of their respective suspension hook 211 is aligned parallel to the longitudinal side wall 160 of the anchor rail or to the longitudinal direction of the anchor rail 100. In embodiments where the angled section 130 projects at a 90° angle, this ensures that the suspension hooks 211 neither collide with the longitudinal side wall 160 nor project from the edge or outer edge of the angled section 130.

[0029] According to Fig. 5 A reinforcing stirrup 220 with a V-shaped profile (V-shaped reinforcing stirrup) is used. It is guided through a wall hole 161 of the anchor rail 100 and hooked in at its apex 221. The V-legs 222 of the V-shaped reinforcing stirrup 220 extend beyond the height of the metal housing, possibly by several times, similar to the U-legs of the embodiments according to Fig. 2 and Fig. 3. By allowing the two V-shaped legs to be embedded deeply in the concrete section, the anchor rail 100 achieves an anchoring with increased strength and stability. This is further enhanced by the fact that the ends 223 of the V-shaped legs are bent outwards at approximately right angles, thus acting as barbs within the concrete section. Reference symbol list 100 anchor rail 110 metal housings 120 U-shaped legs of the housing 130 Angle section 140 thigh end 150 wood filler core 160 Anchor rails - longitudinal side wall 161 Wall hole 162 Narrow side 170 Snap-in element 171 In-depth study 200 reinforcement stirrups 210 U-legs of the reinforcement stirrups 211 Hanging hooks, ironing ends 220 V reinforcement stirrups 221 Vertex 222 V-leg 223 V-leg end L Length of the reinforcement stirrup U-legs H Height of the anchor rail metal housing QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited non-patent literature

[0000] Expert report no. 11-143 of IFBT GmbH - Institute for Facade and Fastening Technology dated October 20, 2011 (accessed September 4, 2024 from https: / / www.bqw-bohr.de / pdf / Gutachten BGWTU Ankerschienen.pdf

[0003] Halfen rail product information, technical section, page 70, accessed on 05.08.2024 at https: / / www.halfen.com / PDF-Dateien / Druckschriften / Technische%20Produktinformationen / HALFEN B 23-DE.pdf

[0004]

Claims

[1] Anchor rail (100) for arrangement in or on a concrete element in order to fasten one or more building components to the concrete element via the anchor rail, wherein the anchor rail (100) has a cross-sectional profile which forms a receiving space in which a filler core (150) is placed, characterized by , that the filler core (150) has a hardness in the range of 15 or 20 Shore-D to 80 or 85 Shore-D and / or is made of wood, in particular hardwood or multi-layer wood, or hard plastic. [2] Anchor rail according to claim 1, characterized by , that the wood used for the filler core (150) comprises spruce wood or coated chipboard wood. [3] Anchor rail (100) according to claim 1 or 2, characterized by , that the filler core (150) is arranged between two opposing side walls (160) of the anchor rail (100). [4] Anchor rail (100) according to claim 1, 2 or 3, characterized bythat the wood or hardwood has been treated to achieve resistance to fire. [5] Anchor rail (100) according to one of the preceding claims, characterized by , that one or more reinforcement and / or strengthening elements (200,220) are attached to the anchor rail (100) for the reinforcement of the concrete element and / or for anchoring in the concrete element. [6] Anchor rail (100) according to claim 5, characterized by , that the reinforcement and / or strengthening elements (200,220) are pivotable, articulated, rotatable, displaceable or otherwise movably mounted. [7] Anchor rail (100) according to claim 5 or 6, characterized by , that the reinforcement and / or strengthening elements (200,220) are each realized with a single or multiple bent stirrup made of strand-like material or a V-, U- or C-shaped bent bar. [8] Anchor rail (100) according to claim 5, or 7, characterized bythat it has one or more receiving elements, each associated with a reinforcement and / or strengthening element (200,220), which are designed for the hinged or otherwise movable attachment of the reinforcement and / or strengthening element(s) (200,220). [9] Anchor rail (100) according to claim 8, characterized by that the receiving element(s) are each designed as a wall hole (161), passage or opening which penetrates an anchor rail wall (160). [10] Anchor rail (100) according to claim 8 or 9, characterized by , that one or more hook-shaped ends (211) of the bracket or rod are hooked or attached to receiving elements on one or more sides of the anchor rail (100). [11] Anchor rail (100) according to claim 9, characterized by , that at least one bracket (220) has a V-shaped profile and is hooked into a receiving element in the V-apex area (221). [12] Anchor rail (100) according to one of the preceding claims, wherein one or more reinforcement and / or strengthening elements (200) are pivotably, articulately, rotatably, displaceably or otherwise movably attached to the anchor rail, characterized by at least one locking element (170) which is assigned to a reinforcement and / or strengthening element (200) and is designed to lock or secure the movable reinforcement and / or strengthening element (200) in a desired position.

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