FASTENING DEVICE AND FASTENING ASSEMBLY

Description

[0001] The invention relates to a fastening device for fastening a load to a profile rail which has a substantially C-shaped cross section and a longitudinal slot, wherein the fastening device has a cover plate for resting on the profile rail, for example in that the length of the cover plate and / or width is greater than the width of the longitudinal slot of the profile rail, a threaded plate which has a threaded bore and a length greater than the width of the longitudinal slot and a width smaller than the width of the longitudinal slot, and a holding device arranged on the cover plate for the threaded plate for insertion into the profile rail, in which holding device the threaded plate is held at a distance from and parallel to the cover plate.The invention further relates to a fastening assembly with such a fastening device and with a profile rail which has a substantially C-shaped cross section and a longitudinal slot, wherein the length of the threaded plate is greater than the width of the longitudinal slot and the width of the threaded plate is smaller than the width of the longitudinal slot.

[0002] Such fastening devices are shown, for example, in EP 1 902 222 B1 or DE 10 2007 014 795 A1.

[0003] To attach the load to the profile rail, such a fastening device is aligned with the threaded plate so that the longitudinal direction of the threaded plate essentially coincides with the longitudinal direction of the profile rail. The fastening device, together with the retaining device and the threaded plate, is then inserted into the longitudinal slot until the cover plate rests against the outside of the profile rail.

[0004] The fastening device is then rotated from this intermediate assembly position around a rotation axis into a pre-assembly position in which the threaded plate engages behind the slot flanks. Finally, the threaded plate is pulled into the final assembly position from the inside against the undersides of the slot flanks so that the slot flanks are clamped between the threaded plate and the cover plate and / or the attachment, thereby fixing the attachment to the profile rail. The cover plate can be a weakly dimensioned element solely for the purpose of temporarily clamping the fastening device to the rail, but it can also be a suitably robust part that directly transmits the clamping forces in the final tightened state and then lies, for example, between the profile rail and the attachment. If the cover plate is made of plastic, it can be formed integrally with the retaining cage.However, the cover plate and the retaining cage can also be attached to each other as two separately manufactured parts in a suitable manner, whereby they can also be made of different materials.

[0005] The fastening device allows the threaded plate to be inserted into the profile rail and then rotated into the pre-assembly position. Firstly, the threaded plate must be held in the fastening device in a rotationally fixed manner. Secondly, the threaded plate must be mounted in the fastening device in such a way that the threaded plate can be moved relative to the cover plate to decrease or increase the distance between the cover plate and the threaded plate.

[0006] EP 1 026 415 B1 shows a fastening device in which the threaded plate is mounted so as to be displaceable relative to the cover plate between two webs extending away from the cover plate. The threaded plate has lateral projections which engage in slots on the webs which serve as guides for the threaded plate. The threaded plate is mounted in the fastening device via the projections and the slots so as to be displaceable towards or away from the cover plate and is reliably held. In order to hold the threaded plate in a defined position when not in use, further elements, such as a spring, are required to urge the threaded plate away from or towards the cover plate.

[0007] EP 1 538 349 A1 shows a fastening device in which the threaded plate is held in an equilibrium position between two spring elements.

[0008] US 2009 / 0087282 A1 and EP 2 816 243 A1 show fastening devices in which the guide elements are not designed as spring elements with spring tabs. DE 10 2015 118 314 A1 also does not show a guide element designed as a spring element.

[0009] However, with the fastening devices described above, the assembly of the threaded plate on the holding device is very complex.

[0010] Another fastening device is shown in DE 10 2007 014 795 A1. This fastening device comprises a cylindrical holding device with a cylindrical spacer collar. The threaded plate can be easily inserted laterally into the holding device. Radial slots are provided on the spacer collar, providing a spring effect that allows the threaded plate to move toward the cover plate. However, the mobility toward or away from the cover plate is very limited.

[0011] The object of the invention is to provide a fastening device and a fastening assembly with such a fastening device, which enable a secure, rotationally fixed hold of the threaded plate and a flexible mounting of the threaded plate, so that the threaded plate is movable relative to the cover plate in order to change the distance between the cover plate and the threaded plate.

[0012] Main features of the invention are defined in claims 1 and 9. Embodiments are the subject of claims 2 to 8 and 10.

[0013] To achieve the object, in a fastening device for fastening a load to a profile rail, which has a substantially C-shaped cross-section and a longitudinal slot, the fastening device comprising a cover plate, the length and / or width of which is greater than the width of the longitudinal slot of the profile rail, a threaded plate which has a threaded bore and a length greater than the width of the longitudinal slot and a width less than the width of the longitudinal slot, and a holding device arranged on the cover plate for the threaded plate for insertion into the profile rail, in which the threaded plate is held at a distance from and parallel to the cover plate, at least one guide element is provided between the holding device and the cover plate, which guide element is preferably designed as a spring element, with which the holding device is movably guided to,is preferably resiliently mounted on the cover plate and further comprises at least one spring tab which extends in an arcuate manner between the holding device (30) and the cover plate (28), wherein a section connected to the cover plate (28) extends essentially in the direction parallel to the plane of the cover plate (28) and a section provided on the holding device (30) extends essentially in the insertion direction E, wherein a receptacle (70) for the spring element (47) is provided on the cover plate (28), in which receptacle the spring element (47) is mounted, or the spring element (47) is firmly connected to the cover plate (28).

[0014] According to the invention, the entire holding device with the spring element is movably mounted relative to the cover plate. The holding device, with the threaded plate held therein, can thus be moved toward or away from the cover plate. The threaded plate is held in the holding device independently of the spring action. This enables better fixation of the threaded plate in the holding device, since no movable mounting of the threaded plate in the holding device is required. Furthermore, the spring element enables greater spring travel.

[0015] By designing the guide element as a spring element, the advantage according to the invention is achieved that a defined movement of the threaded plate relative to the cover plate is possible.

[0016] The spring element continues to push the retaining device and thus the threaded plate away from the cover plate, so that the threaded plate does not rest against the back of the slot flanks in the pre-assembly position and can therefore be more easily moved and positioned along the longitudinal slot. During disassembly, the spring action provides the advantage of a targeted return of the retaining device / threaded plate, making it easier to disassemble the fastening device by turning it back in the opposite direction to the screwing direction during assembly.

[0017] The design of the spring element with at least one spring tab enables a very large spring travel.

[0018] The spring tab extends in an arcuate manner between the holding device and the cover plate, with a section connected to the cover plate running essentially parallel to the plane of the cover plate.

[0019] The spring element can be permanently connected to the cover plate. In another embodiment, however, the spring element is mounted on the cover plate so that it can be moved relative to the cover plate. The spring force and spring travel are not provided solely by the spring tabs; rather, the spring tabs can move relative to the cover plate when the retaining device moves toward or away from the cover plate. This improves the spring effect and increases the spring travel.

[0020] The multi-part design also simplifies the manufacturing of the fastening device, as the individual parts—the retaining device with the spring element and the cover plate—each have a simpler geometry. Furthermore, the individual parts can be made of different materials. For example, the parts can be made of metal or plastic.

[0021] For example, a receptacle for the spring element is provided on the cover plate, in which the spring element is mounted, in particular in a movable manner. The spring element can be inserted into the guide.

[0022] To prevent the spring element from slipping out of the receptacle, suitable fixing means can be provided. For example, the spring element has a locking element with which the spring element is locked to the cover plate. The locking element also facilitates the installation of the spring element on the cover plate. The spring element only needs to be pushed into the guide until the locking element locks onto the cover plate. The position in which the spring element is locked preferably corresponds to a basic position from which the holding device can be moved towards the cover plate by compressing or immersing the spring element. This means that the maximum distance between the cover plate and the threaded plate is predetermined by the locking elements.

[0023] Preferably, at least two spring elements are provided. The spring elements are distributed, for example, in such a way that the holding device cannot tilt when the spring elements compress or rebound, but rather the threaded plate is held in a position substantially parallel to the cover plate, thereby increasing the stability of the fastening device.

[0024] The spring elements can be arranged in various ways. For example, they can be arranged in pairs, with the associated spring elements running parallel to each other, for example. However, the spring elements can also be distributed circumferentially around the holding device, in particular evenly. Preferably, the spring elements are arranged such that the resulting spring force cannot cause the holding device or the threaded plate to tilt.

[0025] Optionally, a threaded rod or a screw with an external thread corresponding to the internal thread of the threaded plate can be provided. This screw is screwed into the internal thread of the threaded plate and protrudes beyond the cover plate on the side of the cover plate opposite the threaded plate. The threaded rod can be supported on the cover plate or an attachment with a head or a screwed-on nut. By screwing the threaded rod into the internal thread of the threaded plate, the threaded plate is pulled towards the cover plate, for example against the spring force of the spring elements, or by screwing it out of the threaded plate, movement away from the cover plate is enabled.

[0026] For example, the holding device is made of plastic and the at least one spring element is integrally formed on the holding device.

[0027] To achieve the object, a fastening assembly is further provided with a fastening device as described above and with a profile rail which has a substantially C-shaped cross-section and a longitudinal slot, wherein the length of the threaded plate is greater than the width of the longitudinal slot and the width of the threaded plate is smaller than the width of the longitudinal slot. In a first orientation, in which the receptacle is arranged in the longitudinal direction of the profile rail, the fastening device can be inserted in the insertion direction into the longitudinal slot into an intermediate assembly position in which the cover plate rests on the longitudinal slot of the profile rail. The fastening device can be rotated from the intermediate assembly position about a rotation axis in an assembly direction into a pre-assembly position in which the threaded plate engages behind the slot flanks of the longitudinal slot.The fastening device can be moved from the pre-assembly position to the final assembly position by clamping the threaded plate against the slot flanks. The spring element can push the threaded plate away from the slot flanks, allowing the fastening device to move freely in the longitudinal direction of the profile rail. The spring element can also pull the threaded plate against the back of the longitudinal slot, thus pre-clamping the fastening device.

[0028] In order to prevent the fastening device from being over-rotated beyond the pre-assembly position, at least one rotation stop can be provided on the cover plate and / or on the holding device, which rests against the profile rail in the pre-assembly position and prevents rotation in the assembly direction beyond the pre-assembly position.

[0029] Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show: Fig. 1An exploded view of a first embodiment of a fastening assembly according to the invention; Fig. 2aa perspective view of the fastening assembly of Fig. 1 ; Fig. 2b sectional view through the fastening assembly from Fig. 2a Fig. 2c a top view of the fastening assembly from Fig. 2a ; Fig. 3a a first perspective view of the fastening device of the fastening assembly from Fig. 2a ; Fig. 3b a second perspective view of the fastening device of the fastening assembly of Fig. 2a ; Fig. 4a a sectional view through the fastening device from Fig. 3a and Fig. 3b ; Fig. 4b top view of the fastening device from Fig. 3a and Fig. 3b ; Fig. 4c a second sectional view through the fastening device from Fig. 3a and Fig. 3b ; Fig. 4a view of the underside of the fastening device Fig. 3a and Fig. 3b ; Fig. 5a a first perspective view of the assembly of a threaded plate in the fastening device of Fig. 3a and Fig. 3b ; Fig. 5b a second perspective view of the assembly of a threaded plate in the fastening device of Fig. 3a and Fig. 3b ; Fig. 6a a first perspective view of the fastening device from Fig. 3a and Fig. 3b with a threaded plate; Fig. 6b a second perspective view of the fastening device from Fig. 3a and Fig. 3b with a threaded plate; Fig. 7a a top view of the fastening device from Fig. 6a und Fig. 6b ; Fig. 7b a sectional view through the fastening device from Fig. 6a und Fig. 6b ; Fig. 8 a plan view of a fastening assembly with the fastening device from Fig. 6a und Fig. 6b ; Fig. 9An exploded view of a first embodiment of a fastening assembly according to the invention; Fig. 10aa perspective view of the fastening assembly of Fig. 9 ; Fig. 10b a sectional view through the fastening assembly from Fig. 10a Fig. 10c a top view of the fastening assembly from Fig. 10a ; Fig. 11a a first perspective view of the holding element of the fastening device of the fastening assembly from Fig. 10a ; Fig. 11b a second perspective view of the holding element from Fig. 11a ; Fig. 12a a sectional view through the holding element from Fig. 11a und Fig. 11b ; Fig. 12b a second sectional view through the holding element from Fig. 11a und Fig. 11b ; Fig. 12c a top view of the holding element from Fig. 11a und Fig. 11b ; Fig. 13a a first exploded view of the fastening device of the fastening assembly from Fig.10a ; Fig. 13b a second exploded view of the fastening device of the fastening assembly from Fig.10a ; Fig. 14a a first perspective view of the fastening device from Fig.13a und Fig. 13b ; Fig. 14b a second perspective view of the fastening device from Fig. 13a und Fig. 13b ; Fig. 15a a top view of the fastening device from Fig. 14a und Fig. 14b ; and Fig. 15b a sectional view through the fastening device from Fig. 14a und Fig. 14b .

[0030] Figures 1, 2a to 3c, and 8 show a fastening assembly 10 for attaching a load, for example, an attachment 12. The attachment 12 is an angled plate with two perpendicular legs 14, each with a bore 16. The attachment 12 can also have a different shape. Furthermore, the angled plate can simply be an adapter for attaching a load to the profile rail 18.

[0031] The Figuren 3a bis 7b The fastening assembly 10 shown comprises a profile rail 18 and a fastening device 20. The profile rail 18 has a substantially C-shaped cross-section and has a longitudinal slot 22 delimited by two substantially parallel slot flanks 24. A receiving space 26 is provided behind the slot flanks 24.

[0032] The Figuren 2 bis 8 The fastening device 20 shown has a cover plate 28, a holding device 30 for a threaded plate 32, a threaded plate 32 and a threaded rod 34.

[0033] With the fastening device 20, the threaded plate 32 can be inserted into the longitudinal slot 22 and rotated therein about a rotation axis D into a pre-assembly position in which the threaded plate 32 engages behind the slot flanks 24. The threaded plate 32 can then be pulled by the threaded rod 34 against the attachment 12 into a final assembly position in which the slot flanks 24 are clamped between the attachment 12 and the threaded plate 32, thereby fixing the attachment 12 to the profile rail 18.

[0034] The cover plate 28 is essentially rectangular (alternatively polygonal, oval, or star-shaped) and has a base plate 36 formed from two parallel webs 38, as well as two side plates 40 pivotably mounted on opposite edges of the base plate 36 about a predetermined deformation point 41. For example, the predetermined deformation point 41 is formed between the base plate 36 and the side plates 40 by a film hinge. The cover plate 28 further has an opening 42 for the threaded rod 34.

[0035] The holding device 30 extends essentially perpendicularly away from the cover plate 28 in an insertion direction E and has a receptacle 44 for the threaded plate 32, which receptacle runs essentially parallel to the plane of the cover plate 28 and in which the threaded plate 32 can be held essentially parallel to the cover plate 28. The receptacle 44 extends through the holding device 30 so that the threaded plate 32 can be inserted into the receptacle 44 in an insertion direction S running transversely to the insertion direction E.

[0036] A through-opening 46 for the threaded rod 34 extends through the cover plate 28 and the holding device 30 in the insertion direction E.

[0037] The receptacle 44 is delimited by a frame 52, 54 on an upper side 48 facing the cover plate 28 and on a lower side 50 facing away from the cover side. The height of the receptacle 44 essentially corresponds to the height of the threaded plate 32, so that an inserted threaded plate 32 has little or no play in the insertion direction E. The frames 52, 54 are connected by two webs 55 that are diametrically opposed with respect to the through-opening 46 and form the lateral boundary of the receptacle 44.

[0038] As in the Figuren 3a , 3b und 4d As can be seen, two spring assemblies 56 are further provided on the outside of the upper frame 52, which are arranged diametrically opposite one another with respect to the axis of rotation D and each have two spring tabs 58, 59 which are radially resilient with respect to the axis of rotation D. The spring tabs 58, 59 each extend radially outwards with respect to the axis of rotation D and are curved in the circumferential direction with respect to the axis of rotation D. Furthermore, the spring tabs 58, 59 of a spring assembly 56 extend in opposite directions and towards one another with respect to a circumferential direction around the holding device 30 or around the axis of rotation D.

[0039] As particularly in Figur 4d As can be seen, the spring tabs 58, 59 of a spring arrangement 56 each overlap in the radial direction with respect to the axis of rotation D and have different curvatures.

[0040] Furthermore, a holding device 60 for the threaded plate 32 is provided on the lower frame 54, which is arranged concentrically to the rotation axis D and projects into the receptacle 44. As shown in the Figuren 4a und 4c As can be seen, the holding device 60 is fastened with a first end 74 to the frame 54 and thus to the holding device 30 and extends with a second, free end in the manner of a mandrel 76 opposite to the insertion direction E into the receptacle 44.

[0041] The holding device 60 extends into a bore 68 of the threaded plate 32 and thus fixes the threaded plate 32 in the receptacle 44. As in Figur 7b As can be seen, the free end 76 projects into the bore 68 and rests against the bore diameter, so that the threaded plate 32 is held free of play, the bore 68 being centered to the axis of rotation D.

[0042] As in Figur 7b As can also be seen, the circumferential diameter of the holding device 60 increases away from the free end 76, so that the holding device 60 tapers towards its free end, whereby the holding device 60 can extend into the bore 68 to different distances in the case of bores 68 with different diameters and can rest against the lower edge of the bore in each case.

[0043] As particularly in the Figuren 3b und 4d As can be seen, the holding device 60 has two holding elements 62 arranged evenly distributed in the circumferential direction with respect to the passage opening 46. Each of the holding elements 62 is resiliently connected to the frame 54 via a spring tab 64. Strictly speaking, the holding elements 62 essentially spring around a circular path, the center of which is the connection point of the spring tabs on the holding device 30. The distance of the outer wall of the holding elements 62 from the axis of rotation D increases in the insertion direction E. The envelope of the holding elements 62 essentially has a conical surface.

[0044] Furthermore, the holding device 60 has an opening 66 extending in the insertion direction E and arranged concentrically with the through-opening 46. Since the holding elements 62 are resiliently mounted, they can also yield resiliently in the radial direction with respect to the through-opening 46, so that the opening 66 can be elastically expanded perpendicular to the insertion direction E, i.e., in the radial direction with respect to the through-opening 46.

[0045] As in the Figuren 3a and 3bAs can be seen, the holding device 30 is connected to the cover plate 28 via spring elements 47 designed as spring tabs, so that the holding device 30 is resiliently coupled to the cover plate 28 in the insertion direction E. The spring tabs extend in an arc shape between the cover plate 28 and the holding device 30, with a section provided on the holding device 30 running essentially in the insertion direction E and a section provided on the cover plate 28 running essentially in the plane of the cover plate 28. The spring elements 47 enable the threaded plate 32 to be elastically displaced in the insertion direction E relative to the cover plate 28.

[0046] The threaded rod 34 has an external thread corresponding to the internal thread of the threaded plate 32, with which the threaded rod 34, designed as a screw, extends into the bore of the threaded plate 32. The threaded rod 34 is further supported by a head 35 on the attachment part 12.

[0047] To attach the attachment 12 to the profile rail 18, a threaded plate 32 is first pushed into the holder 44 in the insertion direction S ( Figuren 5a und 5b ). The threaded plate 32 is essentially rectangular, the width of the threaded plate 32 being smaller than the distance between the two slot flanks 24 and the length of the threaded plate 32 being greater than the distance between the two slot flanks 24 and essentially corresponding to the width of the receiving space 26. The threaded plate 32 also has a bore 68 with an internal thread.

[0048] The retaining elements 62 can yield in the insertion direction E to such an extent that they do not impede, or only slightly impede, the insertion of the threaded plate 32. In particular, they can spring completely out of the receptacle 44. As soon as the threaded plate 32 is pushed far enough into the receptacle 44 that the bore 68 is concentric with the through-opening 46, the retaining elements 62 spring into the bore 68. The retaining elements 62 spring into the bore 68 until the radial outer side of the retaining elements 62 rests against the lower edge of the bore diameter of the bore 68 ( Figuren 6a und 6b ). Since the cross section of the holding device 62 at the first end 74 is larger than the bore diameter of the bore 68 and the cross section of the holding device 60 at the second end 76 is smaller than the diameter of the bore 68, the threaded plate 32 is centered in the receptacle 44 such that the bore 68 is arranged concentrically to the passage opening 46.

[0049] The threaded rod 34 can then be inserted through the through-opening 46 into the bore 68 of the threaded plate 32. The threaded rod 34 can be inserted into the profile rail 18 before or after the fastening device 20 is inserted.

[0050] Since the retaining elements 62 are spring-loaded, the threaded rod 34 can push the free end 76 or the retaining elements 62 out of the bore 68. In particular, the threaded rod 34 can extend through the opening 66 between the retaining elements 62 pushed out of the bore 68. If the threaded rod 34 is unscrewed from the bore 68, the retaining elements 62 can spring back into the bore 68 and hold the threaded plate 32.

[0051] After inserting the threaded plate 32 into the receptacle 44, the fastening device 20 is aligned with the threaded plate 32 such that the longitudinal direction of the threaded plate 32 substantially corresponds to the longitudinal direction L of the longitudinal slot 22. The fastening device 20 is pushed into the longitudinal slot 22 in the insertion direction E into an intermediate assembly position until the cover plate 28 rests on the slot flanks 24 and the threaded plate 32 is located behind the slot flanks in the insertion direction E. The width of the holding device 30 and the width of the threaded plate 32 are smaller than the width of the longitudinal slot 22, so that the holding device 30 with the threaded plate 32 can be pushed into the longitudinal slot 22.

[0052] The fastening device 20 is then rotated in the direction of rotation D into a pre-assembly position in which the threaded plate 32 engages behind the slot flanks 24. Preferably, the fastening device 20 is rotated by approximately 90°. As shown in Figur 8 As can be seen, the desired deformation points 41 run between the base plate 38 and the side plates 40 in this position in the longitudinal direction L, whereby the desired deformation points 41 are located above the longitudinal slot 22 in the insertion direction E.

[0053] In this pre-assembly position, as well as in the previously described intermediate assembly position, the spring assemblies 56 rest against the mutually facing edges of the slot flanks 24 and center the fastening device 20 in the longitudinal slot 22, holding it free of play so that the fastening device 20 cannot fall out of the longitudinal slot 22. Since the spring assemblies 56 each have two spring tabs 58, 59, the fastening device 20 is reliably centered in the longitudinal slot 22 and held by clamping, even when rotated counter to the direction of rotation D.

[0054] Stops may be provided on the cover plate 28, the holding device 30, and / or on the threaded plate 32 to prevent rotation of the fastening device 20 in the direction of rotation D beyond the pre-assembly position. For example, the stops are provided on the spring tabs 58, 59.

[0055] Finally, the threaded plate 32 is pulled by the threaded rod 34 against the insertion direction E against the attachment part 12 in order to clamp the slot flanks 24 between the attachment part 12 and the threaded plate 32. Since the holding device 30 is resiliently connected to the cover plate 28, the cover plate 28 and the holding device 30 can be moved toward each other.

[0056] The cover plate 28 is thereby forced into the longitudinal slot 22 by the attachment part 12, whereby the side plates 40 are folded over by the slot flanks 24 around the predetermined deformation points 41, so that the cover plate 28 can be inserted into the longitudinal slot 22. The side plates 40 slide on the slot flanks 24, which have rounded edges towards the top, i.e. on the side facing away from the receiving space 26.

[0057] In the final assembly position, the cover plate 28 is inserted into the longitudinal slot 22, and the attachment 12 rests directly on the slot flanks 24 of the profile rail 18. The slot flanks 24 are thus clamped directly between the threaded plate 32 and the attachment 12. The cover plate 28 is not located in the force flow between the threaded plate 32 or the attachment 12 and the profile rail 18.

[0058] For example, the fastening device 20 is made of plastic, and the threaded plate 32 and the profile rail 18 are made of metal. When using the fastening device 20 described above, after the threaded plate 32 is clamped against the slot flanks 24 or against the load in the final assembly position under load, no plastic is in the force flow, which can increase the reliability of the connection of the attachment 12 to the profile rail 18.

[0059] The holding and centering device 60 secures the threaded plate 32 in the holding device 30 so that it cannot fall out of the receptacle 44 during assembly. Since the holding elements 62 are resilient, they can also compensate for different thicknesses of the threaded plate 32. In particular, the height of the receptacle 44 in the insertion direction E can also be greater than the thickness of the threaded plate 32, with the holding device 60 urging the threaded plate 32 against the top or bottom of the receptacle 44 under spring load.

[0060] A second embodiment of a fastening assembly 10 or a fastening device 20 is shown in the Figuren 9 bis 15b shown.

[0061] The basic structure and functionality correspond to the fastening assembly 10 described above.

[0062] However, unlike the previously described embodiment, the cover plate 28 is not deformable between a pre-assembly position and a final assembly position. The cover plate 28 is rigid and cannot be inserted between the slot flanks 24.

[0063] Furthermore, the spring elements 47 are not rigidly attached to the cover plate 28, but are mounted on it in a displaceable manner. As can be seen particularly in the Figuren 13a und 13b As can be seen, the cover plate 28 has two receptacles 70 which are diametrically opposed with respect to the passage opening 46 and which are each formed by a recess extending through the cover plate 28.

[0064] The spring elements 47 are arcuate and extend with a section parallel to the plane of the cover plate 28 into the receptacles 70 and are displaceably mounted therein. As shown in particular in Figur 13b As can be seen, the spring elements 47 each have a locking element 72 which locks onto the edge of the guide 70 and thus prevents the spring elements 47 from slipping out of the receptacles 70.

[0065] The maximum distance of the holding device 30 from the cover plate 28 is determined by the position of the locking elements 72. The holding device 30 can be moved away from the cover plate 28 in the insertion direction until the locking elements 72 rest against the edge of the guide 70. Preferably, the spring elements 47 are designed such that the holding device 30 is pushed away from the cover plate 28, i.e., the locking elements 72 are pushed against the edge of the guide 70.

[0066] The holding device 30 can be moved towards the cover plate 28 in the opposite direction to the insertion direction, whereby the spring elements 47 can yield and the spring elements 47 can be inserted into the receptacles 70, i.e. can be displaced relative to the cover plate 28.

[0067] The holding device is therefore constructed in several parts, namely from a cover plate 28, a separate holding device 30, a threaded plate 32, and a threaded rod 34. The cover plate 28 and the holding device 30 can thus be made from different materials, for example. The cover plate 28 can be made from a relatively stiff or pressure-stable material. The holding device 30, on the other hand, only has to absorb small forces, so that it can be made from a relatively light and flexible material. In particular, the cover plate 28 and the holding device 30 can also be made from the same material. The separate production of the cover plate 28 and the holding device 30 offers advantages because they are easier to manufacture, for example using an injection molding process.

[0068] The invention is not limited to one of the embodiments described above, but can be modified in many ways. Bezugszeichenliste

[0069] 10 Fastening assembly 12 Attachment 14 Leg of the attachment 16 Bore of the attachment 18 Profile rail 20 Fastening device 22 Longitudinal slot 24 Slot flanks 26 Mounting space 28 Cover plate 30 Holding device 32 Threaded plate 34 Threaded rod 35 Head of the threaded rod 36 Base plate 38 Webs 40 Side plates 41 Design deformation point 42 Opening in cover plate 44 Mount 46 Through opening 47 Spring element 48 Top of the mount 50Underside of the holder 52Frame 54Frame 55Bridge 56Spring arrangement 58Spring tab 59Spring tab 60Holding device 62Holding and centering element 64Spring tab 66Opening 68Borehole 70Holder 72Locking element 74First end of the holding device 76Free end of the holding device / mandrel ELapplication direction LLongitudinal direction SInsertion direction

Claims

1. Fastening device (20) for fastening a load to a profile rail (18), which has a substantially C-shaped cross-section and a longitudinal slot (22), wherein the fastening device (20) has a cover plate (28) for bearing on the profile rail (18), a threaded plate (32), which has a threaded bore (68) and a length greater than the width of the longitudinal slot (22) and a width smaller than the width of the longitudinal slot (22), and a holding device (30) arranged on the cover plate (28) for the threaded plate (32) for inserting into the profile rail (18), in which the threaded plate (32) is held at a distance from and parallel to the cover plate (28), wherein at least one guide element is provided between the holding device (30) and the cover plate (28), by which the holding device (30) is mounted so as to be displaceably axially guided relative to the cover plate (28), wherein the at least one guide element is configured as a spring element (47), by which the holding device (30) is resiliently connected to the cover plate (28) and has at least one spring tab which extends in an arcuate manner between the holding device (30) and the cover plate (28), wherein a section connected to the cover plate (28) extends in each case substantially parallel to the plane of the cover plate (28) and a section provided on the holding device (30) extends substantially in the insertion direction E, wherein a mount (70) for the spring element (47) is provided on the cover plate (28), in which mount the spring element (47) is mounted, or the spring element (47) is securely connected to the cover plate (28).

2. Fastening device according to any one of the preceding claims, characterized in that the spring element (47) is mounted on the cover plate (28) to be displaceable relative to the cover plate (28).

3. Fastening device according to claim 2, characterized in that the spring element (47) is displaceably mounted in the mount (70).

4. Fastening device according to any one of the preceding claims, characterized in that the spring element (47) has a latching element (72) by which the spring element (47) is latched to the cover plate (28).

5. Fastening device according to any one of the preceding claims, characterized in that at least two spring elements (47) are provided.

6. Fastening device according to claim 5, characterized in that the spring elements (47) are arranged distributed evenly around the holding device (30) with respect to a circumferential direction.

7. Fastening device according to any one of the preceding claims, characterized in that a threaded rod (34) or a screw with an outer thread corresponding to the inner thread of the threaded plate (32) is provided, which is screwed into the inner thread of the threaded plate (32) and projects beyond the cover plate (28) on the side of the cover plate (28) opposite the threaded plate (32).

8. Fastening device according to any one of the preceding claims, characterized in that the holding device is made of plastic and in that the at least one guide or spring element (47) is integrally formed on the holding device.

9. Fastening assembly having a fastening device according to any one of the preceding claims and having a profile rail (18), which has a substantially C-shaped cross-section and a longitudinal slot (22), wherein the length of the threaded plate (32) is greater than the width of the longitudinal slot (22) and the width of the threaded plate (32) is smaller than the width of the longitudinal slot (22).

10. Fastening assembly according to claim 9, characterized in that at least one rotational stop is provided on the cover plate (28) and / or on the holding device (30), which stop rests against the profile rail (18) in a pre-mounting position and prevents rotation in the mounting direction beyond the pre-mounting position.