Bracket assembly and building structure having a bracket assembly

Abstract

A bracket assembly 1 comprising a support 4, a bracket 5 and a clamping device 6. The bracket assembly has a mounting face 24 for mounting on a supporting structure 2. The clamping device has a clampi

Description

The invention relates to a bracket assembly of the genus specified in the precharacterising clause of claim 1 and to a building structure having a bracket assembly. GB 2 249 816 B describes a channel-section bracket assembly of the generic type. The assembly comprises a bracket having teeth in which an engagement plate engages. The engagement plate is pressed against the bracket by a bolt fixed in a supporting wall. The bracket abuts the supporting structure. It has been shown that bracket assemblies of this type can become loose if the clamping force in the bolt diminishes. The object of the invention is to create a bracket assembly of the generic type that enables safe and solid fixing to a supporting structure. A further object of the invention is to specify a building structure having a bracket assembly. The object is achieved in respect of the bracket assembly by means of a bracket assembly having the features of claim 1. In terms of the building structure, the object is achieved by means of a building structure having a bracket assembly with the features of claim 12. The bracket assembly comprises a support and a bracket, each of which have serrations. First serrations of the support have a tooth base plane. The tooth base of the serrations is the region in which adjacent teeth runs into one another. The tooth bases of the first serrations lie in the tooth base plane. The bracket has the mounting face. When fixed to a supporting structure, the teeth of the first serrations protrude from the tooth base plane in the direction of the mounting face. The clamping device has a clamping direction that runs parallel to the clamping axis and from the tooth base plane to the mounting face. When mounted on a supporting structure, the clamping direction is therefore oriented towards the supporting structure. It is provided that a surface normal to a first tooth flank of the second serrations has a directional component in the clamping direction. The surface normal to the first tooth flank of the second serrations thus has a directional component towards the mounting face. When the clamping direction is oriented horizontally, in particular, the first tooth flank of the second serrations slopes downwards in the direction of the mounting face. Due to the inclination of the first tooth flank in the corresponding direction, gravity exerts a force on the support in the direction of the mounting face when the support abuts the first tooth flank. Even if the clamping device becomes loose, the interlocking serrations ensure that the support is pulled towards the mounting face and thus, when mounted, towards a supporting structure, due to gravity. The bracket serves in particular to adjust, position and fix the support in relation to the supporting structure. According to the state of the art, the tooth flanks of the serrations are customarily of symmetrical configuration or oriented parallel to the clamping direction. If a tooth flank abutted by the teeth of the first serrations is oriented sloping down from the mounting face, a surface normal to such a tooth flank has a directional component against the clamping direction. As a result, when the arrangement is mounted, gravity exerts a force in a direction away from the mounting face or supporting structure. A tooth flank that is oriented parallel to the clamping direction exerts no force on the support in the clamping direction. In contrast to this, the arrangement according to the invention enables installation such that the gravity of the support exerts a force on the support towards the mounting face due to the orientation of the first tooth flank of the second serrations. The configuration of the second serrations according to the invention is also advantageous during fitting since the first serrations of the support engage in the second serrations of the bracket and the gravity of the support thus helps to push the serrations further into one another. An operator is not therefore required to fix the support so solidly before the clamping device is tightened. In an advantageous design, the support can be arranged self-supportingly on the bracket when the serrations are engaged in one j another. In such a case, the clamping device serves merely to secure the bracket on the support. This simplifies the fitting of the bracket assembly. In particular, both tooth flanks of at least one tooth, in particular both tooth flanks of all the teeth of the first serrations, are angled towards the clamping axis at different angles. The first serrations and the second serrations serve, in particular, to adjust the relative position of the bracket in relation to the support. To this end, the first serrations are configured, in particular, so as to be able to engage in the second serrations in at least two different positions, in particular in a plurality of different positions. This is achieved, in particular, by the fact that the two serrations are uniformly configured with a constant engagement distance and that no other elements preventing the engagement of the teeth in different positions are provided. In order to enable fine positioning, it is provided, in particular, that the engagement distance of the second serrations is no more than 10 mm, in particular no more than 5 mm, in particular no more than 3 mm. In particular, the engagement distance of the second serrations is exactly the same size as the engagement distance of the first serrations. The engagement distance corresponds to the spacing of the serrations. The engagement distance is the distance between adjacent tooth tips of the serrations. In particular, the engagement distance of the second serrations is at least 2 mm. A simple design is achieved if the bracket has an aperture for the clamping device, through which the clamping device protrudes. This enables the bracket to be positioned simply in relation to the clamping device and the support. In particular, the bracket has two longitudinal edges that lie at right angles to the longitudinal direction of the teeth of the second serrations. The two longitudinal edges are connected by an upper edge and a lower edge of the bracket. In particular, the upper edge of the bracket is a first distance from the aperture, and the lower edge of the bracket is a second distance from the aperture. Here, the distance is measured perpendicular to the longitudinal direction of the teeth of the second serrations. In particular, the first distance is less than the second distance. It is thus possible to ensure in a simple manner the automatic orientation of the bracket about the aperture, or about the clamping device protruding through the aperture, if the weight distribution of the bracket is selected appropriately. The bracket takes the form, in particular, of a plate. In particular, the bracket has a thicker portion that stands proud of the second serrations and splits at least some of the teeth of the second serrations into two tooth portions. In particular, the thicker portion is configured such that it extends further towards the lower edge than the upper edge. Alternatively or in addition to the eccentric arrangement of the aperture between the upper edge and the lower edge, the thicker portion makes it possible to achieve the automatic orientation of the rotational position of the bracket about the aperture, or about the clamping device protruding though the aperture. The thicker portion enables a simple visual check to ensure that the bracket is correctly oriented. Other means for automatically orienting the rotational position about the aperture, in particular the asymmetrical distribution of weight about the aperture, may also be advantageous. In particular, the thicker portion has a smooth surface. In particular, at least some of the teeth of the first serrations have two tooth portions. The distance between the tooth portions is, in particular, matched to the configuration of the thicker portion such that the bracket is unable to rotate about the clamping axis in relation to the support even if the serrations are not engaged in one another. In particular, the distance between at least one tooth portion and the clamping axis is less than the greatest distance between the thicker portion and the clamping axis, the distances being measured perpendicular to the clamping axis. If the bracket is square, the distance is, in particular, less than 1.4 times the width of the bracket. The distance between the tooth portions is, in particular, no more than 4 mm greater than the width of the thicker portion measured in the same direction. In particular, the thicker portion is arranged and configured so as to be able to protrude between the tooth portions when the bracket assembly is fixed to a supporting structure. The thicker portion positions the tooth portions of the first serrations, and so the support, in particular in relation to the bracket. A smooth surface of the thicker portion facilitates the positioning of the support on the bracket since it prevents the teeth of the first serrations from catching on the thicker portion. The bracket assembly is provided, in particular, to hold in place structures to be supported that are placed on the bracket assembly. To this end, the support is provided, in particular, with a support element having a supporting face on the side away from the mounting face. The support may, in particular, be a bracket anchor that serves to fix masonry units to a facade. The masonry units form, in particular, a weatherproof shell that is arranged as a facade in front of the supporting structure and held in place by at least one bracket assembly, in particular by a plurality of bracket assemblies. The supporting element may, for example, be an elongated plate or an elongated angle profile. In particular, one support element is attached to a plurality of main bodies of supports. One continuous support element may thus be assigned to a plurality of bracket assemblies. Instead of a supporting element, other elements such as mounts for facade panels, etc., for example, may be provided for the structures to be fixed with the bracket assembly. The clamping device comprises, in particular, a thread. The clamping axis is, in particular, the central axis of the thread. The clamping device may, for example, be a bolt, an anchor, e.g. an expansion anchor, a T-head bolt or an alternative attachment method. The clamping device comprises, in particular, a bolt having an external thread and a nut having an internal thread that is to be screwed onto the bolt to tighten the clamping device. The clamping device may, in addition, have a spring that pretensions a part of the clamping device in order to simplify fixing. This may be provided, in particular, if the clamping device comprises a hammer-head bolt, with a bolt head positioned in a retaining rail of the supporting structure. The spring is, in particular, arranged in the fixing rail and pretensions the hammer-head bolt in the direction of the bracket. In particular, a spring plate is provided beneath the hammer-head bolt, in contact with rail lips of the fixing rail, to pretension the engagement plate. A surface normal to a second tooth flank of the second serrations has, in particular, a directional component against the clamping direction. Both tooth flanks of teeth of the second serrations are, in particular, inclined in the same direction. A bracket assembly according to the arrangement may, in particular, absorb both shear forces and bending moments. The bracket assembly according to the invention is, in particular, provided to block and adjust components in relation to buildings, walls or other supporting structures. In the case of a building structure having a bracket assembly and a supporting structure, the clamping device is fixed to the supporting structure, and the support and the bracket are clamped to the supporting structure in the direction of the clamping axis by the mounting face. In this arrangement, the first serrations and the second serrations engage in one another. The tooth flanks of the second serrations slope down in the direction of the mounting face of the supporting structure. As a result, gravity acts partially in the direction of the supporting structure and the support is pulled towards the supporting structure even if the clamping device unintentionally works loose. The supporting face is, in particular, oriented horizontally and faces upwards. The longitudinal direction of the teeth of the second serrations includes an angle of at least 45° with the working direction of gravity. In particular, the angle is at least 60°. In an advantageous design, the angle is approx. 90°. The longitudinal direction of the teeth of the second serrations runs, in particular, approximately horizontally. As a result, the serrations, lying one on top of the other, are unable to slip past one another in the longitudinal direction of the teeth. In particular, the longitudinal direction of the teeth of the first serrations and the longitudinal direction of the teeth of the second serrations run parallel to one another. Embodiments of the invention are described below with reference to the drawings. Fig. 1 is a schematic sectional view of a building in the region of a bracket assembly. Fig. 2 is a plan view of the arrangement from Fig. 1 in the direction of the arrow II in Fig. 1, the supporting structure and the supported structure being shown in section. Fig. 3 is a side view of the bracket assembly. Fig. 4 is an exploded perspective view of the bracket arrangement. Fig. 5 is an exploded side view of the bracket assembly. Fig. 6 is an exploded plan view of the arrangement from Fig. 5. Fig. 7 is an enlarged view of a detail of the region of the serrations from Fig. 5. Fig. 8 is a perspective view of the bracket. Fig. lisa partial sectional view of a detail of a building structure 1. The building structure 1 comprises a supporting structure 2. The supporting structure 2 may, for example, be a structure like a wall, slab or beam of the building structure 1. Fixed to the supporting structure 2 is a bracket assembly 3. The bracket assembly 3 supports a supported structure 8. The supported structure 8 may, for example, consist of the bricks of a face wythe. In such a case, the bracket assembly 3 is, in particular, a bracket anchor. Alternatively, the supported structure 8 may comprise facade panels or other elements to be fixed to a supporting structure 2. The bracket assembly 3 comprises a support 4, a bracket 5 and a clamping device 6. The support 4 has a device for retaining the supported structure 8. In the embodiment, a support element 7 is provided. The support element 7 has a supporting face 23. The supporting face bears the supported structure, in this specific embodiment the masonry units. The support element 7 may, for example, be an angled rail that is held on the supporting structure 2 by a plurality of bracket assemblies 3. The support 4 has a main body 10. In the embodiment, the main body 10 takes the form of an approximately U-shaped plate, as shown in the plan view in Fig. 2. A different configuration of the main body 10 may also be advantageous. The main body 10 may also consist of multiple parts. The support 4 has first serrations 31. In the embodiment, the first serrations 31 are formed on the main body 10. The first serrations 31 may also be arranged on another part of the support 4. The bracket 5 has second serrations 32. When the bracket assembly 3 is mounted on the supporting structure 2 as shown in Fig. 1, the first serrations 31 engage in the second serrations 32. The clamping device 6 clamps the support 4 and the bracket 5 against the supporting structure 2. The clamping device 6 braces the parts in a clamping direction x in the direction of a clamping axis 25. The supporting structure 2 has a fixing face 26. The bracket 5 has a mounting face 24. In the fitted position, the mounting face 24 abuts the fixing face 26. In the embodiment, the clamping direction x is oriented perpendicular to the fixing face 26 and perpendicular to the mounting face 24 and runs from the main body 10 to the supporting structure 2. The support 4 comprises a clamping plate 18. The clamping plate 18 is arranged on the side of the main body 10 away from bracket 5. In the embodiment, the clamping device 6 comprises an expansion anchor 21, a washer 19 and a nut 20. The expansion anchor 21 is fixed in a manner appropriate to the supporting structure 2. The expansion anchor 21 has a thread 22. The thread 22 protrudes from the supporting structure 2. The expansion anchor 21 protrudes through the bracket 5, the support 4 and the clamping plate 18. The expansion anchor 21 extends into the supporting structure 2 and is anchored in the supporting structure 2. The washer 19 sits between the clamping plate 18 and the nut 20. The washer 19 may also be omitted. The nut 20 is screwed onto the thread 22 and, with the clamping plate 18, presses the support 4 and the bracket 5 against the fixing face 26 of the supporting structure 2. Another configuration of the clamping device 6 may also be provided. Any fixing means that is customarily used to fix components such as bracket anchors, facade panel anchors, etc. to elements to be fixed to a supporting structure 2 can be used as the clamping device 6. As also shown in Fig. 1, a brace 9 is attached to the main body 10. In the fitted position, the brace 9 is a distance from the bracket 5 in a supporting direction z. In the fitted position, the supporting direction z corresponds to the vertical direction. The supporting direction z extends perpendicular to the clamping direction x. In particular, the supporting direction z extends parallel to the mounting face 24. A tooth base plane 33 of the first serrations 31, which is explained in further detail below, is marked in Fig. 1. The tooth base plane 33 runs parallel to the fixing face 26. The tooth base plane 33 runs, in particular, parallel to the working direction G of gravity. As shown in Fig. 2, the main body 10 has two sidewalls 11 and 12. The main body 10 also has a rear wall or base 16 that connects the two sidewalls 11 and 12 to one another. The first serrations 31, in particular, are formed on the rear wall 16. As shown in Fig. 2, the first serrations 31 are split and have two portions. As also shown in Fig. 2, a thicker portion 45 of the bracket 5 protrudes between the two portions of the serrations 31. The thicker portion 45 is described in further detail below. The two portions of the serrations 31 are positioned a distance apart from one another in a transverse direction y of the bracket assembly 3. The transverse direction y runs perpendicular to the clamping direction x and the supporting direction z. In the fitted position, the transverse direction y is, in particular, oriented horizontally. As shown in Fig. 3, the rear wall 16 has a slot 17. In the embodiment, the slot 17 extends in the supporting direction z. The transverse direction y and the supporting direction z lie, in particular, parallel to the fixing face 26, and the clamping direction x lies perpendicular to the fixing face 26 (Figs. 1 and 2). As shown in relation to one of the portions in Fig. 4, the portions of the first serrations 31 are formed on the edges of the slot 17. The portions of the serrations 31 are, in particular, formed on terminal faces of bent-back longitudinal edges of the slot 17. As shown in Fig. 4, in particular, the bracket 5 has the thicker portion 45. As shown in Fig. 3, the thicker portion 45 protrudes between the longitudinal edges of the slot 17 and the portions of the serrations 31 arranged thereupon. This is described in greater detail below. As also shown in Fig. 4, the bracket 5 has an aperture 44. The clamping device 6, in the embodiment the expansion anchor 21 of the clamping device 6, protrudes through the aperture 44. The clamping plate 18 has an aperture 13. The clamping device 6, in the embodiment the expansion anchor 21, protrudes through the aperture 13 of the clamping plate 18. Fig. 5 shows the support 4 In the fitted position. The working direction G of gravity in the customary fitted position is indicated in Fig. 5. In this position, the supporting face 23 is oriented horizontally and faces upwards. A slight inclination in relation to the horizontal may also be advantageous. As shown in Fig. 5, in the embodiment the clamping axis 25 is the central axis of the thread 22. When viewed perpendicular to the clamping axis 25, the thicker portion 45 protrudes beyond the second serrations 32. This is shown in the side view in Fig. 5. The first serrations have teeth 42. The second serrations have teeth 43. Fig. 6 shows the portions 42a and 42b of the teeth 42 of the first serrations 31. The portions 42a and 42b of teeth 42 form the two portions of the serrations 31. Portions 42a are arranged on one longitudinal slot of the slot 17 and portions 42b are arranged on the other longitudinal slot of the slot 17. As shown in Fig. 6, the portions 42a and 42b of the teeth 42 are a distance e from the clamping axis 25. The distance e is measured perpendicular to the clamping axis 25. In the embodiment, the arrangement is symmetrical, and the distance e is the same for both portions 42a and 42b. However, an unsymmetrical arrangement with different distances e between portions 42a and 42b and the clamping axis 25 may also be advantageous. The thicker portion 45 has a width d measured in the same direction. The distance e is greater than half the width d. As a result, the portions 42a and 42b may be arranged on either side of the thicker portion 45 and so position the support 4 in the transverse direction y in relation to the bracket 5. The distance e is, in particular, no more than 2 mm greater than half the width d. The thicker portion 45 positions the support 4 comparatively precisely on the bracket 5. The width d and the distances e are, in particular, measured in the transverse direction y of the arrangement. The teeth 42 of the first serrations 31 have a longitudinal direction 60. The teeth 43 of the second serrations 32 have a longitudinal direction 50. Longitudinal direction 60 and longitudinal direction 50 run, in particular, in the transverse direction y and perpendicular to the working direction G of gravity (Fig. 5). In the view shown in Fig. 6, the working direction G of gravity runs perpendicular to the drawing plane into the drawing plane. The longitudinal directions 50 and 60 are, in particular, inclined by at least 45° to the working direction G of gravity. Fig. 7 shows in detail the configuration of the first serrations 31 and the second serrations 32. The first serrations 31 comprise teeth 42. In the embodiment, all the teeth 42 are of identical configuration. The teeth 42 each comprise a first tooth flank 27 and a second tooth flank 28. In the fitted position, the first tooth flank 27 faces downwards. In the fitted position, the second tooth flank 28 faces upwards. The gravity of the support 4 can be transferred to the bracket 5 by the first tooth flank 27. The surface normals 34 and 35 to the tooth flanks 27 and 28 are specified below in order to characterise the orientation of the tooth flanks 27 and 28. In this arrangement, the surface normal is a direction vector that is perpendicular to the corresponding tooth flank 27, 28 and points away from it. As shown in Fig. 7, the first tooth flanks 27 each have a surface normal 34. The surface normal 34 has a directional component 38 that runs parallel to the clamping axis 25 and opposite the clamping direction x. The surface normal 34 also has a directional component 51 that runs parallel to the supporting direction z, in particular, in the fitted position, in the working direction G of gravity. The first serrations 31 have the tooth base plane 33. The teeth 42 of the first serrations 31 stand proud of the tooth base plane 33. The tooth base plane 33 connects the roots of the first serrations 31 to one another. The tooth base plane 33 runs through the tooth base 55 of the first serrations 31. The clamping direction x runs from the tooth base plane 33 to the mounting face. In the fitted position, this corresponds to the direction from the support element 7 or supported structure 8 towards the supporting structure 2. The support 4 is to be fixed in horizontal direction in this direction. Due to the directional component 38, the first tooth flank 27 forms an undercut with an oppositely oriented tooth flank 29 of the second serrations 32 against the clamping direction x. As a result, the first serrations 31 cannot be disengaged from the second serrations 32 against the clamping direction x but must also be moved against the working direction G of gravity. When the bracket assembly 3 is fitted on a supporting structure 2, the tooth base plane 33 runs, in particular, vertically, i.e. parallel to the working direction G of gravity. The tooth base plane 33 runs, in particular, parallel to the fixing face 26 of the supporting structure 2. In particular, the tooth base plane 33 runs perpendicular to the clamping axis 25. The first tooth flank 27 includes an angle of inclination p with the clamping axis. The angle of inclination P is less than 90° and greater than 0°. The angle of inclination P is, in particular, 10° to 60°, in particular 20° to 50°. The teeth 42 have second tooth flanks 28 that slope down from the tooth base 33. The second tooth flanks 28 have a surface normal 35. The surface normal 35 has a directional component 39 that is parallel to the clamping direction x and oriented in the clamping direction x. The surface normal 35 has a directional component 52 runs against the working direction G of gravity. The second tooth flanks 28 are angled at an angle of inclination a to the clamping axis 25. The angle of inclination a and the angle of inclination p are of different sizes. The angle of inclination a is, in particular, greater than the angle of inclination p. The angle of inclination a is between 0° and 90°. In particular, the angle of inclination a is between 30° and 80°, in particular between 50° and 70°. All the teeth 42 of the first serrations 31 are, in particular, of identical configuration. The second serrations 32 have teeth 43 with first tooth flanks 29 and second tooth flanks 30. In the embodiment, all the teeth 43 of the second serrations 32 are of identical configuration. The configuration of the second serrations 32 corresponds, in particular, to the configuration of the first serrations 31 rotated about 180° in a longitudinal direction 50 (Fig. 8) of the teeth 43. The first tooth flanks 29 have a surface normal 36 that has a directional component 40 in the clamping direction x. The surface normal 36 also has a directional component 53 that is oriented contrary to the working direction G of gravity. Due to the orientation of the first tooth flanks 29, when the first serrations 31 come into contact with the first tooth flanks 29 of the second serrations 32 gravity G works with a component in the clamping direction x. As a result, due to its gravity the support 4 is pulled in the direction of the bracket 5 and the supporting structure 2. The first tooth flank 29 of the second serrations 32 causes the interlocking serrations 31 and 32 in connection with gravity to counter any loosening of the clamping device 6. The first tooth flanks 29 are inclined by an angle of inclination 8 in relation to the clamping axis 25. The angle of inclination 8 is less than 90° and greater than 0°. The angle of inclination 8 is, in particular, 10° to 60°, in particular 20° to 50°. The angle of inclination 8 corresponds, in particular, approximately to the angle of inclination p. The second tooth flanks 30 have a surface normal 37. The surface normal 37 has a directional component 41 that is oriented against the clamping direction x. The surface normal 37 has a directional component 54 that runs in the working direction G of gravity. The second tooth flank 30 includes an angle of inclination y with the clamping axis 25. The angle of inclination y corresponds, in particular, approximately to the angle of inclination a. In the interests of clarity, in the embodiment the angle of inclination y is indicated in relation to a line parallel to the clamping axis 25. The angle of inclination y is between 0° and 90°. In particular, the angle of inclination y is 30° to 80°, in particular 50° to 70°. The angle of inclination y and the angle of inclination 8 are of different sizes. The angle of inclination y is, in particular, greater than the angle of inclination 8. As shown in Fig. 5, in the fitted position the tooth flanks 29 and 30 of the second serrations 32 slope downwards in the direction of the mounting face 24 of the supporting structure 2. This is also apparent from Fig. 1. The second serrations 32 have an engagement distance a. The engagement distance a of the second serrations 32 corresponds to the engagement distance of the first serrations 31. The engagement distance of the first serrations 31 may also be a whole multiple or a whole factor of the engagement distance a. The engagement distance a of the second serrations is, in particular, no more than 10 mm, in particular no more than 5 mm, in particular no more than 3 mm. The engagement distance a is, in particular, at least 2 mm. The engagement distance a is measured between adjacent tooth tips of the teeth 43 of the second serrations 32. Fig. 8 shows the configuration of the bracket 5 in detail. In the embodiment, the bracket 5 takes the form of a plate. The bracket 5 has two longitudinal edges 46 and 47 that run transversely in relation to a longitudinal direction 50 of the teeth 43. In the embodiment, the longitudinal edges 46 and 47 run perpendicular to the longitudinal direction 50. The bracket 5 has an upper edge 48 and a lower edge 49. In the customary fitted position, the upper edge 48 is oriented upwards and the lower edge 49 is oriented downwards. In the customary fitted position, the longitudinal edges 46 and 47 extend in a vertical direction. The upper edge 48 and the lower edge 49 connect the longitudinal edges 46 and 47. As shown in Fig. 8, a region of the serrations 32 between the thicker portion 45 and the upper edge 48 is provided with continuous teeth 43. The thicker portion 45 splits the teeth 43 beneath it into a first portion 43a and a second portion 43b. Portions 42a and 42b of the teeth 42 of the first serrations 31 engage in portions 43 a and 43b. As also shown in Fig. 3 and Fig. 4, the thicker portion 45 protrudes between the portions of the first serrations 31. The bracket 5 has an aperture 44 through which the clamping device 6 protrudes. The aperture 44 is arranged eccentrically in the bracket 5. The aperture 44 is a distance b from the upper edge 48 and a distance c from the lower edge 49. The distances b and c are measured parallel to the tooth base plane 33. In the fitted position, the distances b and c are measured, in particular, in the supporting direction z. In the embodiment, distance b is less than distance c. When the aperture 44 of the bracket 5 is pushed over the expansion anchor 21 of the clamping device 6, the bracket 5 orients itself due to gravity such that the second serrations 32 are in the correct orientation. In addition, in the embodiment the thicker portion 45 is arranged asymmetrically about the aperture 44. The thicker portion 45 extends to the lower edge 49 and is a distance from the upper edge 48. This also results in the asymmetrical distribution of the weight of the bracket 5. Other measures that result in the asymmetrical weight distribution of the bracket 5 about the aperture 44 and thus in the forced orientation of the bracket 5 in the correct rotational position about the aperture 44 may be provided in addition or as an alternative. The thicker portion 45 enables a simple visual check to ensure that the bracket 5 is mounted in the correct position. This visual check is possible, in particular, due to the unsymmetrical design of the thicker portion 45. In the embodiment, the surface of the thicker portion 45 is smooth. A surface of different design, e.g. a structured surface of the thicker portion 45, may however also be advantageous. The greatest distance f is between the thicker portion 45 and clamping axis 25, the distance f being measured perpendicular to the clamping axis 25. The distance f is greater than at least one distance e between a portion 42a, 42b of a tooth 42 and the clamping axis 25 (see Fig. 6). As a result, the thicker portion 45 is unable to rotate completely about the clamping axis 25 between portions 42a, 42b of the teeth 42 and is thus positioned during fitting. In particular, distance f is greater than the distance e from each portion 42a, 42b to the clamping axis 25. The thicker portion 45 delimits the maximum possible rotation of the bracket 5 about the clamping axis 25 during fitting before the serrations 31 and 32 engage in one another. Due to the configuration of the first serrations 31 and the second serrations 32, the 5 serrations 31 and 32 are able to engage in one another in different relative positions. Here, the possible positions have a minimum distance that corresponds to the engagement distance a. The first serrations 31 and the second serrations 32 are configured such that a plurality of different relative positions is possible. 10 In particular, the first serrations 31 have a greater number of teeth 42 than the second serrations 32. In particular, when the first serrations 31 are in permissible positions in the second serrations 32, all the teeth 43 of the second serrations 32 protrude between teeth 42 of the first serrations 31.

Claims

1. A bracket assembly comprising a support (4), a bracket (5) and a clamping device (6), wherein the bracket assembly (3) comprises a mounting face (24) for mounting on a supporting structure (2), the clamping device (6) having a clamping axis (25), wherein the support (4) comprises first serrations (31) and the bracket (5) comprises second serrations (32), wherein the first serrations (31) are configured so as to be able to engage in the second serrations (32), wherein the first serrations (31) comprise a tooth base plane (33) that extends through the tooth base of the first serrations (31), wherein the clamping device (6) comprises a clamping direction (x) that runs from the tooth base plane (33) to the mounting face (24) parallel to the clamping axis (25),characterised in that the bracket (5) comprises the mounting face (24) and that a surface normal (36) to a first tooth flank (29) of the second serrations (32) comprises a directional component (40) in the clamping direction (x).

2. A bracket assembly according to claim 1, characterised in that both tooth flanks (29, 30) of at least one tooth (43), in particular of all the teeth (43), of the second serrations (32) are inclined at different angles (y, 8) to the clamping axis (25).

3. A bracket assembly according to claim 1 or 2, characterised in that the first serrations (31) are configured so as to be able to engage in at least two positions, in particular in a plurality of different positions, in the second serrations (32).

4. A bracket assembly according to any one of claims 1 to 3, characterised in that the engagement distance (a) of the second serrations (32) is no more than 5 mm, in particular no more than 3 mm.

5. A bracket assembly according to any one of claims 1 to 4, characterised in that the bracket (5) has an aperture (44) for the clamping device (6), through which the clamping device (6) protrudes.

6. A bracket assembly according to claim 5, characterised in that the bracket (5) has two longitudinal edges (46, 47) that lie at right angles to the longitudinal direction (50) of the teeth (43) of the second serrations (32), the two longitudinal edges (46, 47) being connected by an upper edge (48) and a lower edge (49) of the bracket (5), the upper edge (48) of the bracket (5) being a first distance (b) from the aperture (44) and the lower edge (49) of the bracket (5) being a second distance (c) from the aperture (44), the first distance (b) and the second distance (c) being measured perpendicular to the longitudinal direction (50) of the teeth (43), the first distance (b) being less than the second distance (c).

7. A bracket assembly according to any one of claims 1 to 6, characterised in that the bracket (5) has a thicker portion (45) that stands proud of the second serrations (32) and splits at least some of the teeth (43) of the second serrations (32) into two tooth portions (43a, 43b).

8. A bracket assembly according to claim 7, characterised in that the thicker portion (45) has a smooth surface.

9. A bracket assembly according to claim 7 or 8, characterised in that at least some of the teeth (42) of the first serrations (31) have two tooth portions (42a, 42b) and that the distance (e) between at least one tooth portion (42a, 42b) and the clamping axis (25) is less than the greatest distance (f) between the thicker portion (45) and the clamping axis (25), the distances (e, f) being measured perpendicular to the clamping axis (25).

10. A bracket assembly according to any one of claims 1 to 9, characterised in that the support (4) has a support element (7) with a supporting face (23) on the side away from the mounting face (24).

11. A bracket assembly according to any one of claims 1 to 10, characterised in that the clamping device (6) comprises a thread (22) and that the clamping axis (25) is the central axis of the thread (22).

12. A building structure having a bracket assembly (3) according to any one of claims 1 to 11 and having a supporting structure (2), wherein the clamping device (6) is fixed to the supporting structure (2), the support (4) and the bracket (5) are clamped against the supporting structure (2) in the direction of the clamping axis (25) by the mounting face (24), and the first serrations (31) and the second serrations (32) engage in one another, characterised in that the tooth flanks (29, 30) of the second serrations (32) slope down in the direction of the mounting face (24) of the supporting structure (2).

13. A building structure according to claim 12 having a bracket assembly according to claim 10,characterised in that the supporting face (23) is oriented horizontally and faces upwards.

14. A building structure according to claim 12 or 13, characterised in that the longitudinal direction (50) of the teeth (43) of the second serrations (32) includes an angle (e) of at least 45° with the working direction (G) of gravity.

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