WO2008000319A1 - Device for fastening fittings to hollow chamber profiles - Google Patents

Abstract

The invention describes a device (100) for fastening fittings (17) to hollow chamber profiles (18) having a fastening member penetrating at least one wall (25) of the profile (18) in a perforation (26), wherein forces can be introduced into the profile (18) by the fitting (17) by means of said fastening member, the fastening member being embodied as a fastening plug (1) that can be inserted into the perforation and that has at least two snap-in locking projections, between which at least one wall (25) of the profile (18) snaps in, in the installed state of the fastening plug (1). The fastening plug comprises a cylindrical body that does not spread out even when a fitting is fastened.

Description

 DEVICE FOR FIXING FITTINGS TO HOLLOW CHAMBER PROFILES

The invention relates to a device for attachment to a profile, in particular for fastening of fittings to hollow chamber profiles, with a particular at least two walls of the profile in perforations passing through fastening member, via which forces of the fitting part in the profile can be introduced. However, the device can also be used for other purposes, for example as a spacer or as a cable feedthrough.

A device for fastening fittings is known for example from DE 202 18 699 U1. The known device, which for example serves to fasten bands for the hinged connections of a wing, for example a window or a door, to a stationary frame, has a mounting screw, which comprises a self-tapping external thread, so that it is perforated in the profile walls is rotatable. The introduction of forces in the axial direction of the mounting screw in the profile walls via the engaged with the profile walls thread flanks. At the end facing the fitting part, the mounting screw has a radially extending beyond the external thread circumferential collar. Furthermore, the mounting screw a central longitudinal recess, in which a arranged in the direction of insertion at the rear end internal thread and in the insertion direction at the front end a hexagon socket to attack a turning tool are provided.

To introduce the mounting screw in the multi-chamber profile, the perforations are first incorporated in the required size in the profile. Subsequently, the mounting screw is screwed with the turning tool in the profile perforations until the abutment collar rests against the outside of the profile. Subsequently, the fitting part is screwed by means of an engaging in the internal thread of the mounting screw fixing screw.

Although it is possible with the known device to initiate the force acting on a fitting part forces in several walls of the hollow profile, the disadvantage, however, is that the mounting screw is expensive to manufacture. In addition, turning the mounting screw with too high a torque can lead to an undesired deformation of the profile walls into which the external thread of the mounting screw engages.

Another device for fastening fittings on a profile is known from DE 196 07 029 C1. This device has a support bush which can be fixed in bores of the profile in an interference fit. The interference fit is caused by widening of the support sleeve when screwing in threaded pins.

The disadvantage of this support sleeve, that the holder of the fitting part at least substantially non-positively and only then takes place when the fastening screws are screwed for attaching the fitting part. As a result, after the introduction of the support sleeve in the profile holes around their seat is not guaranteed, so that they fall out or can not be in the fully inserted state when screwing the mounting screws, at least. The assembly of the fitting is made difficult. Furthermore, due to the widening of the support sleeve again the risk that the profile walls deform. Another, generic device for fastening of fittings disclosed EP 1 610 004 A1. This comprises a fastening member comprising a monolithic metal body having a cylindrical central portion and an internal thread. The advancing in the insertion direction region, which extends over about two-thirds of the total length of the attachment member, has four circumferentially distributed longitudinal slots, which divide this area into four segments. The internal thread of the fastening member is formed such that this area widens when screwing a fastening screw for the fitting part, which in turn an interference fit of the fastening member is achieved in the profile.

The portion of the attachment member which adjoins this slotted area towards the fitting part is also subdivided into four segments via four slots. Each segment has latching projections into which the edge of a profile perforation can engage.

Although in this fastening device by means of the fastening member due to the locking projections an additional support in the profile perforation is given, is disadvantageous, however, that the fastening member is expensive to produce. In turn, clamping forces are transmitted to a profile wall, which can lead to a deformation of the same.

The invention is therefore an object of the invention to provide a device for attachment to hollow chamber profiles, which is easy to manufacture, and in particular allows a quick and easy mounting of a fitting on a multi-chamber profile.

This object is achieved by the reproduced in claim 1 device.

The fact that the fastening member is not designed as an external thread mounting bolt, but as a fixing dowel having at least two locking projections between which a wall of the profile in the inserted state of the fixing dowel engages, can be omitted on the formation of an external thread and so the manufacturing cost be reduced. The assembly is carried out by inserting the fixing plug into the prefabricated perforations. is brought. Surprisingly, it has been shown that by means of the locking lugs larger forces can be introduced in the axial direction by means of the fastening member in the profile, as in a fastening screw designed as a mounting member. This is due to the fact that the locking lugs can engage behind the profile wall over a larger area than the flanks of a thread. Surprisingly, it has been found that only the locking lugs produce sufficiently high holding forces, so that is omitted in departure of the previous adjustment to a radial contact of the dowel on the Lochungsrad under bias.

Particularly preferred is a further development of the device according to the invention, in which at least in the insertion direction of the fixing anchor leading lug is zurückverlagerbar under overcoming an elastic force under the diameter of the perforations. Due to this configuration, a snap-in of the anchor takes place automatically, without requiring special measures by the person to be mounted.

For this purpose, it is particularly preferred if the latching projections are formed on webs or tongues separated from one another in the direction of the longitudinal axis of the fastening plug. When inserting the Befestigungsdübeis the webs or tongues to the interior of the fixing dowel or to reduce the width of the longitudinal slots can be shifted so far back to the inside of the bracket that the locking projections can be moved past the edge of a hole in the interior of the profile to the Profile wall to hintergreifeπ.

Particularly preferred is a variant of the device according to the invention, in which the fixing plug has an internal thread and a complementary external thread fastening screw. The fitting of the fitting can then be done by screwing by means of the fastening screw.

In order to prevent the screwing of the fitting part is prevented by means of the fixing screw by turning the fixing plug, the fixing plug preferably has means for preventing rotation in the inserted state in the perforations of the profile. These means can in principle be designed in any manner which prevents the attachment plug from rotating. However, it is particularly preferred if the means for preventing rotation comprise a force-fitting or form-fitting co-operating with the fitting part. This extension can be designed in such a way that it is clamped between the fitting part and the profile when the fastening screw is screwed in, or a recess is provided in the fitting part and engages in the projection.

Particularly preferred is a development of the device according to the invention, in which the latching projections of the fixing plug are arranged such that an end portion of the fixing plug protrudes in the mounted state from the fitting part facing wall of the profile.

If this end region, as is particularly preferred, has an outer circumferential surface which engages centering in a bore of the fitting part, a positioning of the same takes place automatically when the fitting part is attached, which, for example, prevents tilting of the hinge axis in the case of a band.

In the case of the presence of this lateral surface, it is particularly preferred if the projection which effects the securing against rotation is arranged on the lateral surface and engages in a complementary recess on the fitting part.

Particularly preferred is a variant of the device according to the invention, in which the latching projections, between which a wall of the profile engages in the inserted state of the fixing dowel, is approximately 2.5 mm in the longitudinal direction of the fixing dowel. The fixing dowel is then universally applicable, since the wall thicknesses of the profiles commonly used are always less than 2.5 mm. However, this variant of the fixing dowel is also suitable for smaller wall thicknesses, for example 1 mm, since when tightening the fastening screw the profile wall engaging behind locking projections are pulled against the same and thus a backlash-free fit of the fixing dowel is effected.

In a further variant of the device according to the invention the distance of the locking projections in the longitudinal direction of the fixing dowel is slightly larger than that Distance between the opposite sides of two profile walls. A fastening dowel formed in this way thus engages behind a profile wall with at least one latching projection and another profile wall with at least one other latching projection. Retaining forces acting in the longitudinal direction of the fastening plug are then introduced into one or the other profile wall, depending on the orientation.

In a further variant of the device according to the invention, which is suitable for fastening of fitting parts on at least three walls comprising profiles, the locking projections are arranged such that they engage behind the at least three walls.

The fixing plug is preferably made of plastic, in particular of glass fiber reinforced polyamide (PA66 GF), since it can be made from this material, for example by injection molding without subsequent forming or machining. Furthermore, this material is characterized by a low thermal conductivity, which prevents the formation of undesirable cold bridges.

However, if the device according to the invention has to meet fire protection requirements, then the fixing plug can also be made of metal.

In a further embodiment of the device according to the invention, the fixing plug comprises a slot extending over its entire length. The slot width is dimensioned such that the leading latching projection can be guided through the perforation in the profile wall when the fastening plug is compressed while reducing the slot width.

In order to facilitate the compression, at least one region of increased flexibility is preferably provided on the fastening plug, which can be effected in particular by a reduction in wall thickness.

The invention will now be explained in more detail with reference to the accompanying drawings. Show it: 1 a) to c) a first embodiment of the fixing plug of a device according to the invention in perspective views, and a view of the fitting part, not shown in Fig. 1 facing the end of the fixing dowel,

2 a) and b) show a second embodiment of a fixing plug of a device according to the invention in a perspective view and in a view of the fitting part, not shown in the drawing, of the fixing tongue;

3 shows a cross section through a profile with inserted dowel and attached fitting part with a partially sectioned view of the fixing dowel.

4 a) to c) show a third embodiment of the fixing plug of a device according to the invention in a perspective, a side and a front view of the fitting part, not shown in FIG. 4;

5 shows a perspective view of a four embodiment of a fixing plug;

6 shows a fifth exemplary embodiment of a fixing plug in a view corresponding to FIG. 5;

7 shows a section of a multi-chamber profile in a partial longitudinal section with fastening dowels inserted in three different embodiments;

Fig. 8 a) to c) sections according to the section lines AA, BB and CC in Fig. 7 and Fig. 9 a) to c) a sixth embodiment of the fixing dowel in a Fig. 4 a) to c) corresponding representation.

The fastening dowel 1 according to the invention forming a fastening element 7 of the device 100 according to the invention comprises a cylindrical base body 2 whose diameter is only slightly larger in the drawing in the direction of insertion into a profile in order to facilitate insertion into a profile perforation as the outer diameter of the base body 2, has a chamfer 3.

At the opposite end of the chamfer 3 of the base body 2 is a dowel head

4 integrally formed, the first a conically widening area 5, a subsequent Rundumnut 6, the Rundumnut 6 delimiting area 8 enlarged diameter, a introduced into a profile state of Befestigungsdü- lever from the fitting part facing wall of the profile projecting end portion 9 and a tapered chamfer 10 includes. The conical area

5 and the region 8 form latching projections 11, 12 and the outer circumferential surface of the end portion 9 is formed such that it can engage centering in a bore of a fitting part (see Fig. 3).

The dowel head has over its circumference uniformly distributed, extending in the direction of the longitudinal axis S of the fixing dowel slots 13, which divide the dowel head 4 into four tongues 14.

Furthermore, the fixing plug 1 has a through hole 15 extending from the dowel head 4 into which an internal thread 16 is incorporated. However, the bore can also be formed as a through hole. It is then possible to use the fixing plug as a cable gland.

The device designated as 100 in FIG. 3 as a whole for fastening a fitting part 17 to a multi-chamber profile 18 further comprises a fastening screw 19 whose external thread 20 is designed to be complementary to the internal thread 16. As is apparent from Fig. 3, the attachment of the fitting takes place 17 partly by screwing in the fastening screw 19 into the internal thread 16 of the fastening dowel 1 inserted into the multi-chamber profile 18.

In order to avoid that the inserted fixing dowel rotates when tightening the fastening screw 19, this has on the dowel head 4 means for preventing rotation 21. These can be designed as different extensions, for example as an eccentric 22, as a cam 23 or as a rib 24, so that they force or - if the fitting has a complementary recess - positively cooperate with the fitting 17. It is also conceivable to effect the rotation over a deviating from a circular outer contour of the fixing dowel and the perforations.

The means for preventing rotation 21 can also - as in the otherwise described with reference to FIG. 1 identical embodiment of FIG. 2 - be formed as a web 24 between two fastening dowels 1. With regard to the structural design and the functionality of the fixing dowel shown in Fig. 2 - to avoid repetition - refer to the comments on the fixing dowel according to FIG. 1. By means of the web 24 and a plurality of fixing dowels can be combined into modules, which then allow a common installation of several fixing dowels in correspondingly arranged perforations.

In the case of the further exemplary embodiment illustrated in FIGS. 4 a) to c), in contrast to the otherwise identical fixing dowel 1, the internal thread 16, the end region 9 and the means for securing against rotation 21 are missing from the fixing dowels 1. Fixing dowels of this type are thus suitable. Fitting parts with the help of clamping elements - such as rivets or expansion dowels - to attach to a profile.

In the embodiment of the fastening plug 40 shown in FIG. 5, the first latching projection 41 is formed by a radially projecting collar 42 provided by a front end facing the fitting part (not shown in the drawing). This collar lies - as shown in particular in FIGS. 7 and 8 a). is recognizable - in the inserted state of the fixing dowel 40 on the mounting side 27 of the profile forming profile wall.

A plurality of second latching projections 43, which in turn are formed by tongues 45 separated from one another by slots 44, have contact surfaces 46 which have a distance to the contact surface 47 of the collar 42 in the longitudinal direction of the fastening plug 40 which is slightly larger than that of the fastening side 27 the profile facing away side 48 of a profile wall 49 is (see Fig. 7). In this embodiment, forces acting from left to right in the longitudinal direction of the fastening plug according to FIG. 7 are absorbed by the collar 42, and forces acting in the reverse direction are received by the locking projections 43.

In the case of the fastening dowel 50 shown in FIG. 6, further latching projections 53 are provided whose design and function correspond to the latching projections 43. This fixing dowel 50 is thus suitable for use on a hollow profile, which comprises a further, spaced from the profile wall 48 by the length L between the contact surfaces 46 and 56 profile wall 58 suitable. In this fixing dowel retaining forces acting as shown in Fig. 7 from right to left, introduced via the locking projections 43 and 53 in a plurality of profile walls 48, 58, so that this fixing dowel is suitable for receiving higher holding forces.

All illustrated and / or described fixing plugs have in common that the holding forces are introduced into the profile walls only via latching projections and that no clamping fit is caused by radial expansion of the inserted plug.

As is apparent in particular from FIGS. 3, 7 and 8, fastening of a fitting 17 with the device 100 according to the invention takes place on a profile wall 25 having multi-chamber profile 18 in that initially perforations 26 are incorporated into the profile walls 25 whose diameter is slightly larger as the diameter of the base body 2 is. Subsequently, the fixing plug 1 is introduced with its chamfer 3 leading from the attachment side 27 forth in the perforations 26. Here, the conical region 5 slides at the edge of the perforation 25 of the mounting wall 25, which forms the mounting side 27, with elastic shifting back of the tongues 14 until the fastening plug 1 has reached the position shown in Fig. 3 in the multi-chamber profile 18. Upon reaching this position, the tongues 14 resiliently resiliently outwardly, whereby the Lochungsrand engages in the Rundumnut between the locking projections 11 and 12. The fixing dowel 1 is thereby axially fixed in the direction of the longitudinal axis S.

In this position, the fitting 17, which has a matched to the outer surface of the end portion 9 bore 28, placed on the end portion 9 and tightened by means of a mounting hole 29 in the fitting 17 by cross-fastening screw 19.

If the fixing dowel 1 must be taken out of the multi-chamber profile 18, this can be done in which after removal of the fitting 17, the end portion 9 is compressed so far reducing the width of the slots 13 that the mounting side 27 forming wall 25 of the locking projections 11th is released again and the fixing plug can be pulled out.

The distance between the two latching projections 11, 12 in the direction of the longitudinal axis S and the width of the Rundumnut 6 is about 2.5 mm. Due to this measure, the fixing plug 1 can be universally used in conventional multi-chamber profiles 18, since their profile walls 25 always have thicknesses that are smaller than 2.5 mm.

In the exemplary embodiment illustrated in FIGS. 9 a) to c), the fixing dowel 60 has a longitudinal slot 59. Whose width is chosen so that the fixing dowel can be compressed so far that in the compressed state, the outer circumference of the locking projection 11 is smaller than the Inneπumfang the profile holes, in which the fixing dowel is to be inserted, is. In order to facilitate the compression, wall thickness reductions 61 extending from the inner circumference of the bore 15 into the dowel wall are provided offset by 90 °, which form regions 62 of greater compliance.

Bezuαszeichen:

100 Fastening device 30 Fixing dowels

1 fixing dowel 40 fixing dowels

2 base body 41 locking projection

3 chamfer 42 collar

4 dowel head 43 Rastvorsprüπge

5 conical section 44 slots

6 Rundumnut 45 tongues

7 attachment member 46 contact surface

8 area 47 contact area

9 end area 48 page

10 Chamfer 50 Attached to u

11 locking projection 53 locking projections

12 locking projection 56 contact surface

13 slots 58 profile wall

14 tongues 59 slot

15 hole 60 fixing dowels

16 internal thread 61 wall thickness reduction

17 fitting part 62 area

18 multi-chamber profile

19 fixing screw

20 external thread

21 Anti-rotation device

22 eccentric

23 cams

24 footbridge

25 profile walls

26 holes

27 mounting side

28 hole

29 mounting hole

S longitudinal axis

Claims

claims: 1. Device (100) for fastening of fitting parts (17) on hollow chamber profiles (18), with a at least one wall (25) of the profile (18) in a perforation (26) passing through fastening member (7), via which forces of the fitting part (17) in the profile (18) are introduced, wherein the fastening member (7) is designed as a fixing dowel (1) which is insertable into the perforation and at least two locking projections (1 1, 12), between which at least one wall ( 25) of the profile (18) in the inserted state of the fixing dowel (1) engages, characterized in that the fixing dowel comprises a cylindrical body which does not spread even when the fitting part is fixed. 2. Device according to claim 1, characterized in that at least in the direction of insertion of the fastening plug (1) leading locking lug (11), overcoming an elastic force under the diameter of one of the perforations (26) is rückverlagbar. 3. A device according to claim 2, characterized in that the latching projections (1 1, 12) are formed by extending in the direction of the longitudinal axis S of the fixing dowel 1 longitudinal slots (13) separate webs or tongues. 4. Device according to one of claims 1 to 3, characterized in that the fastening dowel (1) has an internal thread (16) and a, a complementary external thread (20) comprising fastening screw (19). 5. Device according to one of claims 1 to 4, characterized in that the fixing dowel (1) comprises means for preventing rotation (21) in the perforations (26) of the profile (18) inserted state. 6. The device according to claim 5, characterized in that the means for preventing rotation (21) with the fitting part (17) non-positively and / or positively cooperating extension comprise. 7. Device according to one of claims 1 to 6, characterized in that the latching projections (11, 12) are arranged such that an end region (9) of the fixing dowel (1) in the assembled state from the fitting part (17) facing the wall Profiles (18) stands out. 8. The device according to claim 7, characterized in that the end region 9 has an outer circumferential surface, the centering in a bore (28) of the fitting part (17) engages. 9. Apparatus according to claim 6 and 8, characterized in that the extension is arranged on the lateral surface (9). 10. Device according to one of claims 1 to 9, characterized in that the distance of the latching projections (11, 12) in the longitudinal direction S of the fixing plug (1) is about 2.5 mm. 11. Device according to one of claims 1 to 9, characterized in that the distance of the latching projections in the longitudinal direction of the fixing dowel is slightly larger than the distance of the opposite sides of two profile walls. 12. An apparatus for fastening of fittings on at least three walls comprising profiles according to one of claims 1 to 11, characterized in that they engage behind the at least three walls. 13. Device according to one of claims 1 to 12, characterized in that the fastening plug (1) made of plastic, in particular made of glass fiber reinforced polyamide. 14. Device according to one of claims 1 to 12, characterized in that the fastening plug (1) consists of metal. 15. The device according to claim 1 or 2, characterized in that the fixing dowel (60) comprises a extending over its entire length slot (59). 16. The device according to claim 15, characterized in that the attachment plug (60) has at least one NEN extending over at least a portion of its length region (62) of increased compliance. 17. The device according to claim 16, characterized in that the region of increased compliance comprises a wall thickness reduction (61) of the fixing dowel (60).