EP0728889A1 - Method for fixing components to hollow profiles and fixing and positioning elements for use therein - Google Patents

Abstract

The fastening is used on hollow mouldings, especially on a door or window, in which components are held against the external walls of the moulding, by at least one screw. The screw is retained by a fastening block which can be inserted behind the moulding wall, and which has at least one threaded hole (14). On the inside of the hollow moulding, the block is supported elastically on both sides, normal to its insertion direction (E) and parallel to the wall. It may be guided to the correct position relative to the hole in the moulding through which the screw passes.

Description

The invention relates to a fastening of components to hollow profiles of the type corresponding to the preamble of claim 1, a fastening piece to be used here of the type corresponding to the preamble of claim 4 and a positioning aid also to be used, of the type corresponding to the preamble of claim 23.

Modern door and window constructions include fixed and casement frames made of hollow profiles made of metal or plastic or combinations of both. The walls of the hollow profiles that support the fittings are mostly flat, and the fittings, in particular the hinge plates, are placed flat in front of the wall and by means of cap screws, which penetrate the correspondingly offset holes in the hinge plates and holes in the wall and engage in threaded parts inside the hollow profile , attached to the hollow profiles. The threaded parts can be fasteners with threaded holes, as is apparent from DE 25 34 824 A1, or reinforcing plates, through the holes an expansion nut can be passed through from the side of the component or the hinge plate, which sits when the fastening screw is tightened from behind against the edge of the bore in the reinforcement plate and thus forms the abutment for the fastening screw, the forces of which are distributed by the reinforcement plate, so that the relatively thin-walled hollow profiles are not used locally. An example of these reinforcement plates can be found in DE-GM 72 39 074.

The term "fastening piece" is intended to mean both the actual fastening pieces with a threaded bore according to DE 25 34 824 A1 and the reinforcing pieces according to DE-GM 72 39 074.

When assembling the straps forming an outer component, it is necessary to bring the fastening pieces, so to speak, blindly to the fastening point by pushing them lengthwise through the hollow profile to the correct point using a rod-like feed tool. It is known from DE 25 34 824 A1 and DE-GM 72 39 074 to press the respective fastening piece by means of a resilient element against the back of the wall of the hollow profile to which the band is to be fastened. The resilient element can be a compressible block arranged between the rear side of the fastening piece and the opposite inner wall of the hollow profile or a spring clip, which in practice usually consists of a correspondingly bent steel band.

The effect of this resilient pressing element is twofold: on the one hand it holds the fastening piece in contact with the back of the wall, so that the fastening screws find their thread in the fastening piece without difficulty, and on the other hand it holds the fastening piece in the longitudinal direction inside the hollow profile, so that no uncontrolled displacements of the fastening piece occur.

Due to the resilient design of the spring element This can be used for a large number of the hollow profiles on the market, which differ, among other things, in cross-section and in the dimensions of the cavity in an area that can be bridged by the spring element while maintaining its effect.

In the described fastening of the conventional type, the fastening piece was pressed perpendicularly to the wall of the hollow profile carrying the component against its rear side, but parallel to this wall was free transversely to the direction of insertion. Since the fastening piece should also be suitable for many types of hollow profiles in this transverse direction, it must be matched to the smallest occurring hollow profile and therefore normally has play in the transverse direction parallel to the rear wall. To ensure that the fastening pieces do not move in the transverse direction inside the hollow profile when inserted, the door and window manufacturers have at their disposal suitable sliding tools that are matched to the preferably processed hollow profile and provide the fastening piece with a guide in the transverse direction.

However, if a door and window manufacturer has to process differently designed hollow profiles, he previously had to have several push-in rods with differently designed guide heads or insert the fasteners without transverse guidance, which could be time-consuming repositioning.

The invention has for its object to improve the generic attachment with regard to the positioning of the fastener when inserted into the hollow profile.

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

As a result, the fastening piece is not only guided perpendicularly to the rear of the fastening wall, but also parallel to it in the transverse direction to the direction of insertion. The fastener is so in its own design without additional aids the transverse direction in a certain position, which it retains during insertion, so that the rod-shaped insertion aid only has to apply the force in the longitudinal direction of the hollow profile. Due to the resilient design of the support in the transverse direction, the fastening piece is also suitable for hollow profiles of different internal dimensions without changes.

If a fastening piece is provided with a certain resilient support in the transverse direction, it is normally only positioned for a certain position of the perforations in the wall. In the case of different strips and hollow profiles, the perforations, seen in the transverse direction, can sit in different places.

In order to be able to cope with this problem, additional guide means can be provided which guide the fastening piece in the correct position in the transverse direction when the fastening piece approaches the fastening point.

The positioning must not only take place in the transverse direction, but also in the longitudinal direction of the hollow profile. A marking on the rod-shaped insertion aid, which indicates a certain insertion depth, is only an imperfect positioning means, especially since different fastening points, seen in the longitudinal direction of the hollow profile, can occur with different door and window constructions.

For this reason, an additional positioning aid is recommended, which forms a stop and stops the further insertion automatically when the fastening point is reached, without observing the markings.

A fastening piece to be used for the fastening described has the features according to claim 4.

The fastening piece is therefore not only pressed against it by a resilient element perpendicular to the back of the wall, but also guided parallel to the back transversely to the direction of insertion.

In the preferred embodiment of the invention, the resilient elements are designed as spread resilient wings which are suitable for a quite large range of different dimensions of the interior of the hollow profiles to be processed.

The wings can be designed in practice in the manner set out in claim 6.

Claim 7 gives an indication of the length of the wings. The length of the fastening piece can be different. A fastening piece with only one threaded bore generally does not occur because the hinge flaps must be arranged on the front of the wall in a rotationally fixed manner. With two tapped holes, the dimensions of the threaded pieces are approximately in the range of 50 to 100 mm. In the case of longer fastening pieces, for example for three-part hinges, the length of the wings can remain in the area indicated above.

An important embodiment is the subject of claims 8 and 9 and has the effect that the fastening piece in the area of its contact surface receives an approximately C-shaped profile, which the fastening of both the resilient element, which is responsible for the pressure perpendicular to the wall, as the wing is also permitted in a simple manner by inserting corresponding designs on the same lengthwise into the undercuts.

The feature of claim 10 can also be essential for the function of the fastening according to the invention. Without any special measure, the resilient guide in the transverse direction parallel to the rear of the wall means that the fastening piece is positioned in a certain position in this direction. However, it has already been mentioned that the perforations in the wall of the hollow profile can sit at different points in the transverse direction. The V-shaped spring clips act in the manner of a funnel, which, when the fastening piece is inserted, on a projection protruding into the interior of the hollow profile comes to rest and the fastening piece is also able to push away in the transverse direction into a position matched to the position of the perforations.

Training and fixing of the resilient element acting perpendicular to the back of the wall can be done in the manner shown in claim 11. However, this is only one embodiment. Spring clips bent from wire are also possible, e.g. from a hairpin-shaped double wire.

The same applies according to claim 12 for the wing, while claim 13 describes the joint fastening of both elements with the aid of the undercuts of the fastening piece.

In particular, the wings can be designed in the manner set out in claims 14 and 15. Alternatively, the head surface can also be used to fasten the wings in the manner described in claim 16. The spring clip and the wings can be separate parts, but in a preferred embodiment they are formed in one piece, for example according to claims 18 and 19.

The definition of the spring clip and / or the wing, insofar as tongues can be inserted into the undercuts, can be carried out simply in the manner set out in claim 20. The tongues are clamped in the undercuts by means of the embossing which occurs simultaneously in a press with a cylindrical mandrel on both undercuts.

An important feature for achieving a positioning in the longitudinal direction is the longitudinal stop in the fastening piece, which can be designed in the manner described in claim 22 and with a protruding into the interior of the hollow profile, the position of the perforations in the wall of the same defining projection interacts in a manner yet to be described.

Such a projection can be temporarily created by a positioning aid according to claim 23 be, which can be formed in the manner described in claim 24. After the fastening piece has been positioned, the positioning aid is removed so that the fastening screws can be screwed into the fastening piece.

Since a hinge is usually fixed to the fastening piece with two screws, the wall of the hollow profile has two perforations which lie one behind the other on a line in the longitudinal direction of the hollow profile.

Through the configuration according to claim 25, this constellation can be used to achieve not only the positioning in the longitudinal direction, but at the same time an alignment of the fastening piece in the longitudinal direction, namely namely that the two projections one behind the other engage in the longitudinal groove of the fastening piece and this against rotation by one Protect the vertical axis of the wall in the hollow profile.

A positioning aid with projections for longitudinal adjustment, which reach through the perforations in the wall, requires the presence of a corresponding stop on the fastening piece, which e.g. must be attached to the mounting piece in the form of a pin. Of course, the aim is to make the fastening piece as simple and cheap as possible, since after the assembly of the outer component or the tape it is generally never used again and remains in the hollow profile.

One way of saving the stop on the fastening piece is by designing the positioning aid piece, which can be used again and again, according to claim 26.

In order for the pivoting lever to perform the largest possible stroke perpendicular to the wall when pivoting with the end engaging in the interior of the hollow profile per pivoting angle, a design according to claim 27 is recommended.

The hook according to claim 28 causes the positioning aid does not have to be held when inserting the fastening piece, but rather automatically locks itself temporarily on the outside of the hollow profile.

In particular, the hook and the positioning piece can be realized in the manner described in claims 29 and 30.

• Fig. 1 zeigt einen Horizontalschnitt durch einen Holm des feststehenden Rahmens und des Flügelrahmens bei einer Tür oder einem Fenster aus einem Aluminium-Hohlprofil;
• Fig. 2 zeigt eine perspektivische Ansicht eines Befestigungsstücks;
• Fig. 3 zeigt einen Schnitt nach der Linie III-III in Fig. 2;
• Fig. 4 zeigt einen Horizontalschnitt durch ein aufrechtstehendes Hohlprofil mit angesetztem Positionierhilfsstück;
• Fig. 5 zeigt eine Ansicht gemäß Fig. 4 von oben;
• Fig. 6 zeigt eine entsprechende Ansicht, teilweise im Schnitt, die das Einschieben des Befestigungsstücks erkennen läßt;
• Fig. 7 und 8 zeigen der Fig. 6 entsprechende Ansichten weiterer Einschiebphasen;
• Fig. 9 zeigt einen Querschnitt des Hohlprofils mit ganz eingeschobenem Befestigungsstück nach der Linie IX-IX in Fig. 8;
• Fig. 10 zeigt einen Federbügel und die zugehörigen Flügel in perspektivischer Darstellung;
• Fig. 11 zeigt die Teile nach Fig. 10 in an dem Befestigungsstück montiertem Zustand;
• Fig. 12 und 13, 14 und 15, 16 und 17 zeigen entsprechende Ansichten weiterer Ausführungsformen;
• Fig. 18 zeigt ein alternatives Positionierhilfsstück beim Einschieben des Befestigungsstücks;
• Fig. 19 zeigt eine Fig. 18 entsprechende Ansicht bei in der richtigen Lage angekommenem Befestigungsstück;
• Fig. 20 zeigt eine Ansicht dieses Positionierhilfsstücks nach der Linie XX-XX in Fig. 19.

Exemplary embodiments of the invention are shown in the drawing.

• Fig. 1 shows a horizontal section through a spar of the fixed frame and the sash frame in a door or window made of an aluminum hollow profile;
• Fig. 2 shows a perspective view of a fastening piece;
• Fig. 3 shows a section along the line III-III in Fig. 2;
• Fig. 4 shows a horizontal section through an upright hollow profile with attached positioning aid;
• FIG. 5 shows a view according to FIG. 4 from above;
• Fig. 6 shows a corresponding view, partly in section, which shows the insertion of the fastener;
• 7 and 8 show views corresponding to FIG. 6 of further insertion phases;
• Fig. 9 shows a cross section of the hollow profile with the fastening piece fully inserted along the line IX-IX in Fig. 8;
• Fig. 10 shows a spring clip and the associated wings in a perspective view;
• FIG. 11 shows the parts according to FIG. 10 in the state mounted on the fastening piece;
• Figures 12 and 13, 14 and 15, 16 and 17 show corresponding views of further embodiments;
• Fig. 18 shows an alternative positioning aid when inserting the fastening piece;
• FIG. 19 shows a view corresponding to FIG. 18 with the fastening piece having arrived in the correct position;
• FIG. 20 shows a view of this positioning aid along the line XX-XX in FIG. 19.

In Fig. 1 a horizontal section through an upright spar 1 of a fixed frame and an upright spar 2 of a casement can be seen. The spar 1 consists of a front hollow profile 3, which is connected to a rear hollow profile 5 via plastic profiles 4 to avoid cold bridges. Likewise, the spar 2 of the casement consists of a front hollow profile 6, which is connected to a rear hollow profile 8 via plastic profiles 7. With the hollow profile 3, the tab 9 of the band designated as a whole by 10 is connected to the hollow profile 6 of the tab 11. The band tabs 9, 11 are set from the outside against the flat walls 20 of the hollow profiles 3 and 6 in the exemplary embodiment, and there are fastening screws 12 penetrating through the band tabs 9, 11 and perforations 13 in the respective wall 20, which are in threaded bores 14 of fastening pieces 15 engage, which rest with a contact surface 16 against the rear 20 'of the wall 20 of the respective hollow profile 3 or 6. The fastening screws 12 are designed as cap screws, which sit with their head 17 on shoulders 18 of the hinge tabs 9 and 11, which are pivotally connected to one another by a hinge pin 19 forming the hinge axis.

As can be seen from FIGS. 2 and 3, the fastening piece 15 has a cuboid body 49 and, in the contact surface 16 formed by a cuboid surface, a longitudinal groove 22, in the flanks 23 of which, at the bottom of the longitudinal groove, transverse grooves extending opposite one another and extending along the longitudinal groove 22 24 are provided so that the fastening piece 15 forms a type of C-profile in the area of the contact surface 16, into which a spring clip 25 made of spring steel can be inserted lengthwise to a certain depth with its one end 25 '. The inserted end of the spring clip 25 is clamped in the longitudinal grooves 24 by opposing kidney embossments 26. The spring clip 25 is pressed into the hollow profiles 3 and 6 when the fastening piece 15 shown in FIG. 2 is in a force-free state and serves to press the fastening piece 15 with its contact surface 16 against the rear side 20 'of the wall 20 with a force S, wherein the spring clip 25 is supported against the opposite wall 21 of the hollow profile 3 or 6. To save material, the fastening piece 15 can also be beveled in a trapezoidal shape, as shown at 15 ″ in FIG. 3. The fastening piece 15 is advanced by means of a rod-like auxiliary tool from one end of the hollow profile 3 or 6 to the fastening point.

This measure of pressing a fastening piece perpendicular to the wall is part of the prior art.

In the case of the fastening piece 15, in addition to the pressure in the sense of the force S, a guide parallel to the wall 20 transversely to the insertion direction is provided by executives P, who are generated by wings 30 made of spring steel, which spread in a V-shape in the insertion direction and with them front edges 30 'are slightly compressed when inserted into the hollow profiles 3 and 6 transversely to the direction of insertion and bear against the mutually opposite walls 27, 28 of the hollow profiles 3 and 6. As a result, the fastening piece 15, which is considerably narrower than the distance between the walls 27, 28, is held in a central position and is guided parallel to the wall 20 transversely to the direction of insertion E. As can be seen from FIG. 6, the wings 30, 30 normally run symmetrically to an expansion axis 39 located in the longitudinal central axis of the fastening piece 15 (FIG. 6).

In the embodiment of FIG. 2, the wings 30 are approximately trapezoidally connected to one another at their end facing the fastening piece 15 by a head piece 31, which is fastened with a rivet 47 to the same end face 15 'of the fastening piece 15, from which the spring clip 25 is also made exit.

The spreading plane of the wings 30 is parallel to the contact surface 16. The wings 30 made of flat material in the form of spring steel and the head piece 31 are perpendicular to the spreading plane. The wings 30 and the head piece 31 are made in one piece by angling a spring steel blank. The upper edges 30 ″ of the wings 30 in FIG. 2 run in the plane of the contact surface 16.

In the base of the longitudinal groove 22, a stop 32 in the form of a pin 33 is inserted on the side of the threaded bore 14 facing away from the spring clip 25 and the purpose thereof will be described.

The fastening piece 15 interacts with its positioning at the right place under the perforations 13 of the wall 20 with a positioning aid 40, which is shown in FIGS. 4 to 9. The positioning aid 40 consists of a cuboidal aluminum piece 41, which can be brought into contact with the outside with a contact surface 48 on the wall 20 and which engages through the perforations 13 with projections 42 which are formed by the projecting ends of pins 43 pressed into the aluminum piece 41. The pins 43 can be cylindrical on the part engaging into the interior of the hollow profile or somewhat flattened in the manner shown in FIGS. 4 to 9, the planes of the flats running parallel to the longitudinal direction of the hollow profile 3. The projections 42 engage less inside the hollow profile 3 than the longitudinal groove 22 is deep.

The insertion of the fastening piece 15 takes place from one end of the hollow profile in the insertion direction E with the aid of an insertion tool 45 and a widened auxiliary tool 44 which almost completely fills the distance between the walls 27, 28, which allows the fastening piece 15, which by the spring clip 25 is held in contact with the wall 20 and by the wings 30, 30 approximately in the middle between the walls 27, 28, lengthwise through the hollow profile 3 push through.

In the exemplary embodiment shown in FIG. 6, the bores 13 do not sit in the middle between the walls 27, 28, but are offset to the right by an amount 34 according to FIG. 6. Normally, the fastening piece 15 would not reach the correct position in which the perforations 13 in the wall 20 and the threaded bores 14 overlap.

The V-shaped spread wings 30, however, have a kind of funnel function. The right wing 30 in FIG. 6 comes into contact with the further insertion of the fastening piece 15 against the upper projection 42 of the positioning aid piece 40 according to FIG. 6 and thereby presses the leading end of the fastening piece 15 somewhat to the right against the spring force of the wings 30, 30 , as can be seen from Fig. 7. As a result, the upper projection 42 of the positioning piece 40 can enter the end of the longitudinal groove 22 in the manner shown in FIG. 7. With further advancement, the lower projection 42 in FIG. 7 can also reach the longitudinal groove 22. As a result, the fastening piece 15 is led out laterally from the center and correctly positioned. A rotation of the fastening piece 15 about an axis perpendicular to the wall 20 cannot occur because two projections 42 placed one behind the other, the width of which is adapted to the width of the longitudinal groove 22, engage in the longitudinal groove 22.

FIG. 8 shows the final phase of the insertion, which is achieved when the stop 32 attached in the longitudinal groove 22 of the fastening piece 15 comes to rest on the projection 42, which is the upper one according to FIG. 8. At this point, the positioning is also effected in the longitudinal direction. As can be seen from FIG. 9, the threaded holes 14 in the fastening piece 15 and the holes 13 in the wall 20 then overlap. The positioning aid 40 can now be removed in order to screw the fastening screw 12 into the threaded holes 14.

In the embodiment of FIGS. 10 and 11, the spring clip 25 and the wings 30 are separate parts. On the spring clip 25, a tongue 29 can be inserted in the longitudinal direction into the transverse grooves 24. The two wings 30 form a bent part made of spring steel with the connecting head piece 31, a tongue 35 also being provided on the upper side of the head piece 31, which can be inserted under the tongue 29 into the transverse groove. Both tongues 29, 35 together are clamped in the transverse groove 24 by the depression 26. The insertion depth on the spring clip 25 results from the width gradation 29 ', which is set in front of the end face of the fastening piece 15 when inserted.

In the embodiment of FIGS. 12 and 13, the spring clip 25 is designed as in FIGS. 10 and 11. However, the wings 30, 30 are formed on a plastic injection-molded part 36, which likewise has a head part 37, on the upper edge of which a cutout 38 is provided for the tongue 29 to pass through. The plastic molded part 36 is thus placed in front of the end face 15 'of the fastening piece 15 and the tongue 29 is inserted lengthways into the transverse grooves 24. The areas of the spring bracket 25 adjacent to the gradations 29 'engage in grooves 36' of the injection molded plastic part 36 provided in the mutually facing inner sides of the wings 30, as a result of which the fixing of the head part 37 on the end face 15 in the vertical direction according to FIGS. 12 and 13 Direction is given. The width gradations 29 'bear against the head piece 37. The end of the tongue 29 is defined by the embossing 26, whereby the plastic injection-molded part 36 is also fixed at the same time.

In the exemplary embodiment in FIGS. 14 and 15, the spring clip 25 and the wings 30 are made in one piece from a punched blank of spring material and the joint fixing takes place as in FIG. 2 by a rivet 47 penetrating the perforation 46 in the head piece 31.

In the embodiment of FIGS. 16 and 17, the spring clip 25 and the wings 30 are also formed in one piece, but this time as a plastic injection-molded part. A tongue 35 is molded onto the end of the spring clip 25 adjacent to the head piece 31, which can be inserted into the transverse grooves 24 and clamped by the depression 26.

Another positioning aid 50 is shown in FIGS. 18 to 20, which makes it possible to do without the stop 32 on the fastening piece 15. The insertion direction E runs from bottom to top in this embodiment. The positioning aid 50 is a plastic injection-molded part in the form of a box open towards the wall 20 and towards the opposite side, in the interior 51 of which a hook 52 is arranged at the free end of one arm 53 of an elongated two-armed lever 54, the other arm 55 of which the body 58 of the positioning aid 50 protrudes perpendicular to the wall 20. The hook 52 points upwards according to FIG. 19. On the opposite side, the positioning aid 50 has a projection 57 which engages in the lower perforation 13 according to FIG. 19 and which lies against the wall of the perforation 13 opposite the insertion direction E, but does not fill its entire cross section, so that the hook 52 also still fits through.

As can be seen from FIG. 20, the hook 52 is substantially narrower than the width of the interior 51 and is arranged in the middle. Shaft pins 56, which can be easily twisted, extend in the vicinity of the outer boundary of the "box" on both sides up to the walls of the "box" there. When the positioning aid 50 is to be brought into position, it is placed with its contact surface 48 against the wall 20, the projection 57 being brought into the position shown in the lower perforation 13. At the same time, the hook 52 becomes somewhat less than the position according to FIGS. 18 or 19 by attacking the projecting arm 55 shifted below, whereupon it can be inserted into the lower perforation 13 and can reach behind the upper edge of the perforation 13 when the lever 55 is released. The positioning aid 50 is now fixed to the wall 20 and can be released.

In the recess 51 of the positioning aid 50 is above the pivot lever 54, i.e. offset in insertion direction E, a second pivot lever 64 is mounted, which is also narrower than the width of the recess 51 and is mounted on torsional shaft journals 66 which, in the vicinity of the outer boundary of the "box", extend as far as the side walls of the recesses 51.

The pivoting lever 64 has a first leg 62, which extends from the shaft journals 66, which are arranged near the boundary of the positioning aid 50 remote from the wall 20, perpendicular to the wall 20 against the wall 20 in a force-free state. Connected to the free end of the leg 62 is a leg 63 running parallel to the wall 20 in the direction of insertion, which at its free end according to FIGS. 18 and 19 is angled to the right approximately at right angles into a leg 65, which in the force-free state as in the position shown in FIG. 19 passes through the upper perforation 13.

When the positioning aid 50 is attached to the wall 20 and the fastening piece 15 is pushed from below in the insertion direction E according to FIG. 18, the spring clip 25 presses the pivot lever 64 back into the wall 20 by twisting the shaft journals 66. The front end of the leg 65 slides along the bottom of the groove 22. With continued insertion, the perforation 13 and the threaded bore 14 overlap at some point, and the leg 65 snaps into the upper threaded bore 14, as shown in FIG. 19. When this point is reached, the fastening piece 15 is correctly positioned in the longitudinal direction. The positioning in the transverse direction is initiated by the wings 30 by guiding the projection 65 into the longitudinal groove 22 and thereby in the transverse direction If necessary, push the fastening piece 15 away a little until the correct lateral position is reached. By actuating the pivot lever 54, the positioning aid 50 can be released and removed. Due to the spring action of the spring clip 25, the fastening piece 15 remains in the position reached. The fastening screws can be screwed in.

Claims (30)

Fastening a component to a hollow profile, in particular tape parts (9, 11) of doors, windows and the like on the fixed frame and / or casement frame formed by hollow profiles (3,6), the respective component from the outside against a wall (20) of the hollow profile (3, 6) can be attached and fastened to it by means of at least one fastening screw (12), penetrating the perforations in the component and the wall (20) perpendicular to the latter and into an inside of the hollow profile (3, 6) on the rear (20 ') of the wall (20) arranged, at least one threaded bore (14) having fastening piece (15) can be screwed in, which can be inserted lengthwise through the hollow profile (3,6) up to the fastening point before the fastening screw (12) is screwed in and is resiliently pressed onto the rear side (20 ') of the wall (20) by forces acting perpendicularly thereto, characterized in that the fastening piece (15) is parallel to the wall (20) and transversely to the direction of insertion (E) inside the hollow profile (3,6) is also resiliently supported on both sides. Fastening according to claim 1, characterized in that guide means are provided on the fastening piece (15), by means of which the fastening piece (15) when inserting and approaching the fastening point parallel to the wall (20) and transversely to the direction of insertion (E) in the correct position with respect to the position of the perforations (13). Fastening according to claim 1 or 2, characterized in that the fastening piece (15) is assigned a positioning aid (40, 50) which can be attached to the wall (20) of the hollow profile (3, 6) from the outside at the fastening point and through which Has perforations (13) in the interior of the hollow profile (3,6) engaging projections (42,65), which cooperate with the insertion of the fastening piece (15) to position it longitudinally and / or transversely to the direction of insertion (E). Fastening piece for use in fastening according to one of claims 1 to 3, with a body which has a contact surface (16) for contacting the rear (20 ') of a wall (20) of a hollow profile (3, 6) and at least one perpendicular to this contact surface (16) includes a threaded bore (14) for a fastening screw (12) and a resilient element (25) which is intended to be fastened to the wall (20) when the fastening piece (15) is pushed into the hollow profile (3,6) ) opposite side is supported on the hollow profile (3, 6) and can be pressed against the back (20 ') of the wall (20) by means of the fastening piece (15), characterized in that at least one further resilient element is provided on the fastening piece (15) is, by means of which the fastening piece (15) inserted into the hollow profile (3,6) parallel to the rear side (20 ') of the wall (20) and transversely to the direction of insertion (E) on both sides on the hollow profile (3,6) resiliently abs is sustainable. Fastening piece according to claim 4, characterized in that on the leading side of the fastening piece (15) when inserted, two elongate ones in a plane parallel to the contact surface (16) in the insertion direction is provided with V-shaped, resilient wings (30, 30) which can be compressed in the plane against the spreading and which have their front edge (30 ') in the hollow profile (3,6 ) inserted state for contact with each other parallel to the rear (20 ') of the wall (20) and transversely to the insertion direction (E) opposite walls (27,28) of the hollow profile (3,6) are determined. Fastening piece according to claim 5, characterized in that the wings (30, 30) together form a V-shaped part made of flat material, which is angled in the spreading plane such that the surface of the flat material is perpendicular to the spreading plane, and that the wings ( 30,30) are attached to the bottom of the "V" on the end of the fastening piece (15) carrying the spring clip (25). Fastening piece according to claim 5 or 6, characterized in that the wings (30, 30) have a length in the insertion direction of 0.5 to 1.0 times the length of the fastening piece (15). Fastening piece according to one of claims 4 to 7, characterized in that a continuous longitudinal groove (22) is provided in the contact surface (16) of the fastening piece (15) and the flanks (23) of the longitudinal groove (22) have undercuts. Fastening piece according to claim 8, characterized in that the undercuts are formed as transverse grooves (24) of rectangular cross-section, which are provided in the groove flanks (23) and sides parallel to the contact surface (16). Fastening piece according to one of claims 5 to 9, characterized in that the wings (30, 30) towards the end of the fastening piece (15) towards the respective flank (23) on its side of the longitudinal groove (22) taper. Fastening piece according to one of claims 8 to 10, characterized in that the resilient element for pressing the fastening piece (15) against the rear side (20 ') of the wall (20) is designed as a spring clip (25) made of flat material and with one end in the undercuts inserted and fixed therein in the longitudinal direction of the longitudinal groove (22). Fastening piece according to one of claims 5 to 11, characterized in that the wings (30, 30) have a tongue (35) which extends counter to the insertion direction (E) and which extends from the end of the tongue which leads when the fastening piece (15) is inserted into the tongue Undercuts are inserted and fixed in the longitudinal direction of the longitudinal groove (22). Fastening piece according to one of claims 5 to 12, characterized in that the end (25 ', 29) of the spring clip (25) and the tongue (35) of the wings (30, 30) can be pushed one above the other into the undercut and therein in the longitudinal direction of the longitudinal groove (22) can be determined. Fastening piece according to one of claims 1 to 13, characterized in that the wings (30, 30) are connected by a head surface (31) perpendicular to the expansion axis (39). Fastening piece according to claim 14, characterized in that the tongue (35) is angled against the insertion direction (E) from the head surface (31). Fastening piece according to claim 14, characterized in that the head surface (31) is riveted against the end face (15 ') of the fastening piece (15). Fastening piece according to one of claims 5 to 16, characterized in that the spring clip (25) and the wings (30, 30) are designed as a one-piece part. Fastening piece according to claim 17, characterized in that the part is a bent sheet metal part. Fastening piece according to claim 17, characterized in that the part is a plastic injection molded part. Fastening piece according to one of claims 8 to 15 and 17 to 19, characterized in that to fix the spring clip (25) and / or the tongues (29, 35) in the area in which they engage in the undercuts, an embossing (26 ) the edges of the longitudinal groove (22) is provided. Fastening piece according to one of claims 4 to 20, characterized in that a longitudinal stop (32) is provided axially outside a threaded bore (14) in the longitudinal groove (22) of the fastening piece (15), which does not project beyond the contact surface (16). Fastening piece according to claim 21, characterized in that the longitudinal stop (32) is formed by a pin (33) let into the fastening piece (15). Positioning aid for use in a fastening according to claim 3, characterized in that it has a body (41, 58) with a contact surface (48) for the front of a wall (20) of the hollow profile (3, 6) and at least one from the contact surface ( 48) comprises protruding projection (42) which can be passed through the perforation (13) in the wall (20) and protrudes on the back (20 ') of the wall (20) by an amount below the depth of the longitudinal groove (22), so that the mounting piece (15) when inserted into the hollow profile (3,6) with the longitudinal stop (32) on the projection (42) comes to rest when the perforation (13) in the wall (20) and the associated threaded bore (14) in cover the mounting piece (15). Positioning aid according to Claim 23, characterized in that the projection (42) is formed by a pin (43) embedded in the positioning aid (40) of a thickness corresponding to the clear width of the longitudinal groove (22). Positioning aid according to claim 23 or 24, characterized in that the positioning aid (40) has two successive projections (42, 42) at a distance of two perforations (13, 13) in the wall (20) of the hollow profile (3, 6). Positioning aid according to claim 23 , characterized in that it comprises a pivot lever (64) which is pivotally mounted on the positioning aid at one end and can be pushed away when the fastening piece (15) is inserted by pivoting against a spring torque, and in the pivoted state with the free end ( 65) slides along the bottom of the longitudinal groove (22) and snaps into a threaded hole (14) when it reaches it. Positioning aid according to claim 26, characterized in that the pivot lever (64) is angled twice in one plane at approximately a right angle. Positioning aid according to one of claims 23 to 27, characterized in that it engages in a perforation (13) in the wall (20) of the hollow profile (3, 6), which does not fill the perforation in cross-section, projects from the contact surface (48) and against the edge opposite the insertion direction (E) the perforation (13) laying stop (57) and a through the remaining cross-section of the perforation (13), the in the insertion direction (E) edge of the perforation (13) engaging behind, to bring and ineffective hook (52), which Positioning aid (50) on the wall (20) holds. Positioning aid according to claim 28, characterized in that the hook (52) is formed at the free end of one arm (53) of a two-armed lever (54) which, with the second arm (55) from the positioning piece (50) according to the Hollow profile (3,6) on the far side. Positioning aid according to Claim 28 or 29, characterized in that it is designed as a box which is open on two opposite sides, that the two-armed lever (54) and the pivoting lever (64) are arranged in the interior (51) of the box and are narrower than the width of the box and that the two-armed lever (54) and the pivot lever (64) are mounted on resilient torsion pins (56, 66) in the vicinity of the edge of the box facing away from the contact surface (48).

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