WO2014048989A1 - Mounting screw for fastening fittings on hollow chamber profiles, construction kit for a mounting screw and arrangement of a multi-chamber profile and a mounting screw - Google Patents

Description

 Mounting screw for fastening fittings to hollow chamber profiles, kit of a mounting screw and arrangement of a multi-chamber profile and a mounting screw

The invention relates to a mounting screw for fastening of fitting parts, in particular of strip parts of multi-chamber profiles, a kit of a mounting screw and an arrangement of a multi-chamber profile and a mounting screw and also detects the combination of mounting screw and the hollow chamber profile.

It is known to use fastening plates for fastening strip parts to multi-chamber profiles, which are inserted into a chamber of the multi-chamber profile from the open end, so that they engage behind the back of the wall on which the tape is intended to rest. The mounting plates have threaded holes into which the band part passing through fastening screws are screwed. For this purpose, the position of the threaded holes must be introduced into the multi-chamber profile walls in accordance with through holes. The position of the through holes is determined for example by means of a drilling template. In the band parts and the through holes engaging centering sleeves are used for the exact positioning of the tape, before it is fixed by tightening the mounting screws. The disadvantage of this type of attachment, for example, the door hinge series 60AT the company. Hahn GmbH & Co. KG, Mönchengladbach is known that holding forces are introduced only in one wall of the multi-chamber profile. Especially with thin-walled multi-chamber profiles, deformations of the multi-chamber profile walls can occur. Furthermore, the attachment is complicated because of the large number of steps to be performed and required components. From DE 20 218 699 U a device for mounting fittings on multi-chamber profiles is known. It has a mounting screw and a fastening screw, wherein the mounting screw comprises an external thread of a length that several walls of the hollow chamber profile are penetrated with screwed mounting screw. At the rear end of the mounting screw an opening into the rear end side internal thread is provided, into which the fastening screw can be screwed. Furthermore, a hexagon socket to attack a turning tool for screwing the mounting screw is incorporated into the multi-chamber profile at this front end. Finally, the mounting screw has at its rear end a radial projection which provides an abutment collar. To attach a fitting part, the fastening screw is screwed into the multi-chamber profile so far that the abutment collar rests against the outer profile wall. Subsequently, the fitting part, which must have a centering bore adapted to the outer circumference of the abutment collar or the radial projection, is put on and fixed in the internal thread by screwing in the fastening screws. Such mounting screws which are mounted prior to attachment of the fitting part and which have an internal thread for screwing in the actual fastening screw passing through the fitting part are also referred to as "screw anchors." Admittedly, such mounting screws have proven to be reliable for securing a fitting part to a multi-chamber profile is, however, that, in particular if the multi-chamber profile has heat-insulating webs between adjacent walls, owing to which the multi-chamber profile Walls passing through mounting screw to unwanted cold spots comes.

Such a mounting screw ("screw anchor") is known from EP 1 948 945 B1, in which the provision of cold bridges is avoided (insulating fastening element) .This mounting screw is composed of a front metallic part and a rear part of a heat-insulating material. A further mounting screw for fastening a fitting part to a multi-chamber profile is known from DE 10 2007 043 705. It has no internal thread, but serves for the direct fastening of the fitting part by itself being screwed through an adapted passage opening in the fitting part in perforations of the multi-chamber profile and the fitting part at the edge of the passage opening with its head engages behind.Such mounting screws are also referred to as "anchor bolts".

The invention has set itself the task of creating an improved mounting screw, a kit for such a mounting screw and an improved arrangement of a mounting screw and a multi-chamber profile. As used herein, the term "mounting bolt" in the context of the invention refers to both "screw anchors" and "anchor bolts." This object is achieved by the assembly screw recited in claim 1, by the kit set forth in claim 27 and the arrangement reproduced in claim 29 solved.

The mounting screw according to the invention for fastening strip parts to multi-chamber profiles comprises a thread area comprising an external thread which has a length that is greater than the distance between two adjacent walls of the multi-chamber profile. The mounting screw has a seen in screwing front part, which includes an external thread and is preferably made of a metallic material. The mounting screw has a central part made of a heat-insulating material, such as plastic. By "heat-insulating" is meant, in particular, a material which has a significantly smaller thermal conductivity, in particular by at least one order of magnitude, than the material of the front part The mounting screw has a rear part which comprises an external thread and is preferably made of a metallic material The rear part comes into contact with an outer wall of the multi-chamber profile.

This mounting screw has several advantages: Since the rear part is preferably metallic, as preferred, a metallic drive can be provided. It can therefore be provided a key surface for the attachment of a rotary tool, which is formed of metal. In addition, the load capacity of the screw connection can be increased by the preferably metallic rear part. The middle part also ensures thermal insulation. It is thus created an insulating fastener with a load capacity that can be comparable to that made entirely of metal. Preferably, the threaded portion of the mounting screw at least partially comprises the rear part and the front part of the mounting screw, in other words: the metal parts of the mounting screw. The threads of the metal parts are preferably designed so that they continue to each other without discontinuity. By this is to be understood that the threaded struts of the rear part can engage in the formed of the front part threaded struts, without forming the latter much again.

The front, middle and rear part of the mounting screw is preferably formed integrally.

If the rear part and the front part are positively connected to the middle part, then there is a particularly strong mounting screw. In one embodiment, the middle part of the mounting screw is injection molded and more preferably injected directly into the back and front part. It is also conceivable that the connection of the middle part to the front and rear part is additionally stabilized by gluing and / or pressing.

The middle part of the mounting screw preferably completely separates the front part from the rear part, i. the front and rear parts do not directly adjoin one another. This achieves optimal thermal insulation. In the axial direction of the mounting screw between the front and rear parts occurring forces thus act completely on the middle part. Surprisingly, it has been shown that the mounting screw is nevertheless sufficiently resilient. Preferably, the middle part has axial projections, which more preferably protrude into complementary recesses of the front and rear part.

The axial projections preferably each have at least one key surface. The axial projections therefore preferably have a cross-section which does not have a circular outline. The cross section may have a polygonal outline, more preferably the axial projections have a hexagonal cross section.

In particular, in order to increase the resistance of the mounting screw against tensile forces acting between the front and rear parts, the axial projections of the middle part preferably have radial projections. The radial projections may have a circular cross-section to provide a maximum bearing surface in the axial direction. It is also conceivable that they also have a non-circular cross-section in order to increase the resistance to torsional forces. The radial projections preferably engage in complementary radial recesses of the front and the rear part. In another embodiment of the mounting screw according to the invention, the rear part and the front part can be materially connected to the middle part. The cohesive connection can be effected in any known manner, for example by gluing. However, it is particularly preferred to produce the cohesive connection by welding, in particular by ultrasonic welding, since this avoids the need for further materials for the production of the mounting screw according to the invention.

In a further, preferred embodiment of the mounting screw according to the invention, the rear part and the front part are non-positively connected to the central part. Under frictional particular, a connection should be understood, which is effected by a screw.

It is then particularly preferred to form the middle part as a threaded piece.

This can then in particular comprise two threaded portions, wherein the one threaded portion engages in a complementary threaded portion of the rear part, the other threaded portion in a complementary threaded portion of the front part. The threaded portions are preferably formed radially symmetrical to the central longitudinal axis of the mounting screw, i. the central longitudinal axes of the threaded portions coincide with the central longitudinal axis of the mounting screw.

In one embodiment, the threaded portions of the threaded portion as internal threads, the threaded portions of the rear part and the front part are each formed as external threads. A reverse training is also possible.

In order to be able to screw the mounting screw according to the invention into the multi-chamber profile, a key area is preferably provided for the selective engagement of a turning tool. The wrench surface can in any way, the transmission of torque from the rotary tool in the Mounting screw allowed to be trained. In particular, the key area can be formed as a hexagon socket.

The key face is preferably of the end of the mounting screw, as viewed in the screwing direction, i. in the assembled state from the outside of the multi-chamber profile forth, accessible.

In a first embodiment, the key surface is provided on the rear part. If it is intended exclusively for this rear part, the torque which must be introduced for screwing in or loosening the mounting screw via the middle part in the front part, must be transferred completely over the middle part.

To avoid this, the key face may be provided at the front part. This is particularly advantageous if the mounting screw is a self-tapping or self-tapping screw in which a particularly high reaction moment acts on the front part during the cutting or shaping process. In order to keep the torsional load of the central part as small as possible, the key surface can also be provided in both the front and the rear part. If the rotary tool is set in such a way that it interacts with both the front part and the rear part, no torques have to be transmitted via the middle part, assuming a torsional rigidity of the rotary tool, which is advantageous, depending on its load capacity can be.

It is also possible to provide the key area also in the middle part, so that also in this torsional forces are einleibar.

In a particularly preferred embodiment of the mounting screw, the external thread of the front part is self-tapping or - particularly preferably - formed self-forming. This will, on the one hand, create an additional step of tapping in holes in the multi-chamber profile avoided. On the other hand - especially if the thickness of the profile walls in the region of the engagement of the mounting screw is increased by self-forming - a particularly reliable screw connection is achieved.

If the mounting screw is in particular self-forming, the front region of the front part of the mounting screw preferably tapers conically. The mounting screw can - as already mentioned - be designed as a so-called anchor bolt. Likewise, however, the mounting screw is also suitable as a so-called screw anchor. Your rear part then has an opening into the rear end threaded hole into which a screwed to be fastened fitting part machine screw is screwed. The rear part of the mounting screw then preferably has a radial projection at its rear end, which on the one hand forms a contact surface on the outer wall of the multi-chamber profile, and on the other hand can provide a centering surface for the fitting part. The ratio of the diameter of the radial projection to the core diameter of the mounting screw may be less than 1.5.

Regardless of whether the mounting screw is formed as an anchor screw or a screw anchor, the ratio between the outer diameter to the core diameter of the external thread in the non-conical region is preferably <1, 1.

It has been shown that such mounting screws are well suited to effect sufficient holding forces in the usually thin multi-chamber profile walls. By the thickness of the threaded portion, for example, the risk of tearing of the thread in the Mehrkammerprofilwandungen is reduced. The advantages of the invention are particularly well in such a mounting screw to advantage. Because in this case, the force acting per surface in the mounting screw is relatively small. It can therefore be well absorbed by the thermally insulating middle part. The middle part may be made of plastic, which may be reinforced with fibers. The fibers may, for example, be glass fibers and / or carbon fibers. The plastic may be a polymer or a duromer.

The invention also relates to a kit of a mounting screw having a front part, a rear part and a middle part which can be screwed to the front and the rear parts to provide the mounting screw bar. By way of example, such a mounting screw has already been described as an exemplary embodiment of such a screw in which the connection of the front and rear parts to the middle part is effected in a force-locking manner.

In this kit, the front, middle and rear parts of the mounting bolt are separate, unassembled parts. In order to adapt the mounting screw to different sized multi-chamber profiles and different installation situations, a plurality of optional usable middle parts is provided in order to vary the length of the mounting screw provided by mounting the components can. In addition, it is also conceivable to attach different rear and in particular front parts to the kit in order, for example, to adapt the mounting screw to different profile materials and dimensions by the user himself. So it is conceivable, for example, that for use on multi-chamber profiles made of steel or plastic multi-chamber profiles with Stahlarmierung another front and possibly also rear part is used, the material and its thread is adapted to the respective material than for example in a Multi-chamber profile made of aluminum.

By screwing the front and the rear part with the insulating central part is therefore possible to provide a kit that contains all the components to allow the user to customize the particular installation situation. The invention also relates to an arrangement comprising a multi-chamber profile comprising an outer wall and at least one inner wall which is spaced from the outer wall by a temperature insulation area, and a mounting screw of the type described above.

In the arrangement according to the invention, the adjacent walls of the multi-chamber profile are separated from each other by a temperature isolation region, which may be formed by two partial profiles connecting insulating webs. Since the center region of the mounting screw is preferably arranged between the two adjacent walls, when the mounting screw is in its screwed state, it does not form any significant cold bridges between the walls.

A further profile wall is preferably arranged in front of the above-mentioned two adjacent profile walls, more preferably exactly one, and most preferably the outer wall of the multi-chamber profile.

In a preferred embodiment of the arrangement, the rear part of the mounting screw already passes through at least two walls - preferably exactly two walls - of the multi-chamber profile. More preferably, the front part passes through at least one wall of the multi-chamber profile, preferably exactly one. By already at least two walls are penetrated by the preferred metallic rear part, an increased load capacity of the screw is created. The arrangement is also particularly suitable for a fire door. The first two walls of the multi-chamber profile are penetrated by the preferably metallic rear part and provide sufficient support when in case of fire, the middle part of the mounting screw and / or the insulating webs of the profile should melt.

The invention will now be explained in more detail with reference to embodiments of the invention shown in the drawings. Show it: Figure 1 is a side view of a first embodiment of an anchor bolt designed as mounting screw.

Figure 2 is a partial longitudinal section through the mounting screw shown in Figure 1 ..;

Fig. 3 is a cross-section along the lines III-III in Fig. 2;

4 shows a view from above of an example of an arrangement according to the invention;

5 shows a longitudinal section of a second embodiment of an assembly screw designed as an anchor screw.

6 shows a longitudinal section through a third embodiment of an assembly screw designed as an anchor screw.

7 shows a longitudinal section through a fourth exemplary embodiment of a mounting screw designed as an anchor screw;

8 shows a longitudinal section through a fifth exemplary embodiment of a mounting screw designed as an anchor screw;

9 is a longitudinal section through a sixth embodiment of an anchor bolt designed as a mounting screw.

10 is a side view of a first embodiment of a screw designed as a mounting screw; Fig. 1 1 is a partial longitudinal section through the mounting screw shown in Figure 10. 12 shows a longitudinal section through a second embodiment of a screw designed as a mounting screw.

Fig. 13 is a longitudinal section through a third embodiment of a

 Screw anchor trained mounting screw;

14 shows a side view of a further embodiment of a mounting screw designed as an anchor screw; FIG. 15 shows a partial longitudinal section through the assembly screw shown in FIG. 10; FIG.

16 shows different views of a mounting screw produced by means of a kit in different lengths.

Fig. 17 is a top view of a further example of an inventive

 Arrangement as well

18 shows a view according to FIG. 17 of a further example of an arrangement according to the invention.

In Fig. 1 as a whole designated 100 mounting screw 100 is composed of three parts. It is a front part 7 is provided, which is made of a metallic material. In addition, a rear part 9 is provided, which is also made of a metallic material. These two parts are separated by a central part 8, which is formed of a heat-insulating material, in particular plastic. The front part 7 and the rear part 9 each comprise an external thread 7a, 9a. The mounting screw 100 has a threaded portion 4, which includes the complete front part 7, the full middle part 8 and the rear part 9 except for the radial projection 17 (FIG. 1). The radial projection 17 of the rear part 9 forms the head of the mounting screw. Towards the threaded portion, the head has a conical surface 20 with a friction device 21, for example in the form of a Corrugation or knurling 21 on. The conical surface is provided for abutment with the band part 1 to be mounted, the friction device serves to increase the coefficient of friction between the conical surface and the band part and thus increasing the loosening torque of a screwed mounting screw. The middle part 8 has no external thread in the illustrated embodiment, the threaded portion is thus interrupted here.

Fig. 4 shows an embodiment of an arrangement with this mounting screw 100 and a multi-chamber profile 2, for fixing a hinge part 1 to the multi-chamber profile 2. As shown in FIGS. 1 and 4, the threaded portion 4 has a length L which is greater than that Distance A between two adjacent walls 5 and 6 of the multi-chamber profile 2 is. The adjacent walls 5 and 6 are by a temperature isolation region 1 1, which is provided by insulating bars 12, separate walls. The threaded region 4 thus penetrates these two adjacent walls 5 and 6. These two walls 5 and 6 of the multi-chamber profile 2 are preceded by a further wall 10, which represents the outer wall of the multi-chamber profile 2. The rear part 9 of the mounting screw 100 comes into contact with the outer wall 10. 4 also shows that the rear part 9 passes through two walls of the multi-chamber profile, namely the outer wall 10 and the wall 5 following thereon. The front part 7 passes through exactly one wall, namely the wall 6 following in the screwing direction on the wall 5 The core diameter of the mounting screw 100 in the illustrated embodiment is 10.95 mm. The head diameter M of the mounting screw 100 is about 14 mm in the illustrated embodiment. The ratio of the diameter of the radial projection 17 and the head to the core diameter is thus in the illustrated embodiment 100 is about 1, third

The core diameter K of the threaded portion of the rear and front part 9, 7 of the mounting screw 100 corresponds approximately to the outer diameter of the middle part 8, wherein the core diameter to the front end of the front part 7 out at a constant edge height F by an amount of about the edge height F corresponds, decreases. Due to this measure, special ders good properties with respect to the self-forming of the thread in the profile walls 5, 6, 10 achieved.

In the rear end face 16 of the rear part 9 is a key surface 19 for the attachment of a turning tool. This is in the illustrated embodiment is a hexagon socket.

The central region 8 has a distance region 18 which completely separates and spaces the front part 7 from the rear part 9. Whose size is chosen so that a thermal insulation of the front part 7 of the mounting screw is ensured by the rear part 9. Although the mounting screw which passes through an insulating region 1 1 thermally separated profile walls 5, 6, therefore, the mounting screw is no cold bridge. The middle part 8 of the mounting screw 100 is disposed in a region of the mounting screw, which between the through the insulating region 1 1 of the Multi-chamber profiles of separate profile walls 5, 6 is arranged.

The distance range 18 is configured without external thread. Since no profile is provided here, a continuation of the threaded portion in the middle part 8 is unnecessary.

In the embodiment shown in FIGS. 2 and 3, exactly one axial projection 13, 13 'extends from the distance region 18 of the middle part 8 to both sides in the direction of the longitudinal extent of the mounting screw. As shown in FIGS. 2 and 3, these two axial projections 13, 13 'have a hexagonal cross-section. The projections 13, 13 ^' engage in complementary recesses 14, 14 ^{' of} the front and rear parts 7, 9 of the mounting screw. In this way, the front part 7 and the rear part 9 of the mounting screw 100 are connected to each other by means of the middle part 8 separating them, and torsional forces can be transmitted between the front and the rear part 7, 9. The front part 7 of the mounting screw 100 does not touch the rear part 9. Each axial projection 13, 13 'also has two radial projections 15 of a diameter d. Overall, the middle part 8 thus has four radial projections 15. Since the radial protrusions having axial projections 13, 13 ^{'are arranged} in complementary recesses 14, 14 ^{' of} the front and rear part of the mounting screw, form the radial projections 15 undercuts, which are engaged behind by the front part 7 and the rear part 9 of the mounting screw , They therefore take in the longitudinal extent of the mounting screw 100 directed tensile forces between the front and the rear of the mounting screw 100.

In the mounting screw 100 shown in Fig. 1 to 3, which is designed as an anchor screw, when tightening in the multi-chamber profile 2 by means of a not shown in the drawing, attached to the key surface 19 turning tool torque or torsional forces from the rear part 9 on the transmitted front part 7 via the middle part 8. In particular, since the forming of the thread in the profile walls, which takes place essentially by means of the front part 7, requires the application of a high torque in comparison with the further screwing in, the middle part is subjected to high torsional forces in this embodiment.

The illustrated in Fig. 5, second embodiment of an anchor bolt designed as mounting screw 200 corresponds in terms of its structure and its operation substantially to the reference to FIG. 1-3 described embodiment 100, the description of which reference is made in order to avoid repetition. In the following, only the differences between the mounting screw 100 and the other described embodiment will be illustrated.

In contrast to the mounting screw 100, the key surface 19 is not provided at the rear part 9, but at the front part 7 in the mounting screw 200. In order to achieve this key surface 19 with a suitable for attack, not shown in the drawing rotary tool, is a central Bore 22 is provided which extends from the head 17 through the rear part 9 and the middle part 8 to the key surface 19 of the front part 7.

As a result of this configuration of the mounting screw 200, the torque which is required for screwing in is introduced into the front part 7. This is for example advantageous if in the planned use of the mounting screw 200, for example due to the configurations or the material of the profile walls is to be expected that is to be expected for the formation of the thread in the profile walls with a very high, applied torque.

Another embodiment of an anchor screw designed as mounting screw 300 is shown in Fig. 6 in longitudinal section. This embodiment corresponds in terms of its structure and its operation in the main borrowed embodiments 100 and 200. However, it has the following difference on the latter: The key surface 19 extends through the rear and middle part 9, 8 to the front Tel 7. Will now a suitable turning tool introduced into the front part 7, so no torques on the middle part of the front to the rear part or vice versa must be transmitted. The middle part 8 can be designed optimized for the maximum transmission of tensile and shear forces.

A similar optimization is also possible if the key surface 19 is provided only in the rear and in the front part 9, 7 and the middle part 8 instead of the key surface has a through hole through which the rotary tool in the key surface of the front part 7 can be inserted , Such an embodiment 400 is shown in FIG.

8, the key face extends through the rear and middle parts 9, 8 into the front part 7. However, the key face 19 is not up to the free end. In the case of a further alternative embodiment 500 according to FIG formed the rear part 9, but only on End of a bore portion 24, whereby a attachment of a rotary tool is facilitated.

In another embodiment 600 shown in FIG. 9, the key surface 19 extends through the free end of the front part 7, so that a rotary tool can also be attached from the free end of the front part 7. It is also possible, even with the other, in Fig. 5-8 illustrated embodiment 200, 300, 400, 500 form the key surface extending through the free end of the front part extending therethrough. Or, in the embodiment 100 according to FIG. 2 an accessible from the free end of the front part ago key area is provided, which ends at a still located in the front part 7 point.

A further exemplary embodiment 700 of a mounting screw, which is now designed as a screw anchor, are shown in FIGS. 10 and 11. Again, only the differences from the assembly screw 100 explained with reference to FIGS. 1 to 3 will be described below.

The essential difference between the mounting screw 700 and the mounting screw 100 is that the mounting screw 700 is now designed as a screw anchor. The radial projection 17, which forms the rear end of the rear part 9, is therefore not head-shaped with conical surface and friction device, but projects beyond the core diameter K only by about twice the flank height F and forms a stop for the outer wall 10 of the multi-chamber profile.

For mounting a hinge part 1, the mounting screw 700 is first screwed into the multi-chamber profile 2. For this purpose, in turn, in the rear part 9, a key surface 19 is provided for the engagement of a turning tool (not shown). It is located at the bottom of a threaded bore 23 extending from the rear end into the rear part 9. This threaded bore 23 forms an internal thread, by means of which the band part can be removed after mounting the mounting screw 700 with the aid of a fastening screw, not shown in the drawing. screw, which is screwed into the internal thread of the threaded hole 23, is attached.

The further exemplary embodiments 800 and 900 of a mounting screw shown in FIGS. 12 and 13 are in turn screw anchors. In contrast to the exemplary embodiment 700, in the case of the mounting screw 800, the key surface 19 -as in the exemplary embodiment 200 -is arranged in the front part 7. In order to reach this key surface 19 with a suitable rotary tool, in turn, a bore 22 is provided which passes through the rear part 9 through the threaded bore 23 and the middle part 8. Otherwise, the mounting screw 800 corresponds to the mounting screw 700.

In the mounting screws 200 and 800 only one key surface in the front part 7 is provided in each case. However, it is also possible to additionally provide a further, not shown in the drawing key surface on the rear part 9, it should be necessary to initiate the torque required for fixing the mounting screws while avoiding overloading of the middle part. Such a key surface is provided in the mounting screw 400 of FIG. 7.

The illustrated in Figure 13 in longitudinal section further embodiment 900 of a screw designed as a mounting screw comprises, in contrast to the embodiment 800, a key surface 19, which from the end of the threaded bore 23 through the rear part 9 and the middle part 8 to the front part 7 extends. As in the case of the exemplary embodiment 300, no torque needs to be transmitted from the central part 8 when the mounting screw is screwed in, so that the advantages described with reference to the exemplary embodiment 300 are achieved. Again, it is also possible to provide a through hole instead of the key surface 19 in the middle part 8. In principle, the mounting screws designed as screw anchors can be designed with regard to the arrangement and design of the key area in accordance with the anchor bolts described above. Another embodiment of a mounting screw 1000 is shown in Fig. 14 to 18 by means of an anchor bolt. In a corresponding manner, a screw anchor can be formed. This mounting screw in turn comprises a rear part 9, a middle part 8 of heat-insulating, ie poor heat-conducting material, such as plastic and a front part 7. The rear and the front part are made of a mechanically stable material, preferably metal. The front and the rear part 7, 9 are in turn separated from each other by means of the middle part 8, ie the front and the rear part do not abut each other. The front and the rear part 7, 9 in turn each have an external thread 7a, 9a. The middle part is threadless and has a cylindrical shape. Its outer diameter corresponds at most to the core diameter of the adjacent external threads 7a, 9a. The middle part 8 is formed as a threaded piece 25 with female thread portion 27, 28 and central bore 26. Complementary external threads 27 ', 28' are provided on the mutually facing end regions 7b, 9b of the front and the rear part 7, 9, so that the two parts 7, 9 can be screwed to the threaded sleeve 26. Stops that determine the distance X of the front part 7a of the rear part 9a in screwed state with the threaded portion are formed by a provided on the threaded part 25 inwardly extending radial projection 29 and paragraphs 30, 31, where the threaded piece 25th in the screwed state is applied. The key surface 19 is formed in both the front and rear Tel 7, 9. A significant advantage of this embodiment 1000 is that its three components - front, middle and rear part 7, 8, 9 - can be mounted by a user. This results in the possibility to provide a kit which comprises at least one front and at least one rear part 7, 9 and a plurality of middle parts 8, which differ in their length. By alternative use of different middle parts can thus be provided mounting screws 1000, which differ in the distance x their front and rear parts 7, 9 and thus in their total length, as shown in Fig. 16. By using different middle parts 8, the mounting screw 1000 can thus be adapted to different profile variants and installation situations. By way of example, FIGS. 17 and 19 show different profiles and installation situations. In Fig. 17, the outer wall 10 - as in the arrangement of FIG. 4 - closely adjacent an inner wall 5 of the profile provided. With both walls 5, 10, the thread 9a of the rear part 9 of the mounting screw 1000 is engaged. In order that the thread 7a of the front part 7 can engage in engagement with a further profile wall 6, a short middle part 8 is used. In contrast, in FIG. 18, the distance between the outer wall 10 and the inner wall 5 is greater, so that the thread 9 a of the rear part 9 is only in engagement with the outer wall 10. Use is now a longer middle part 8, so that the thread 7a of the front part 7 in turn can engage with the further profile wall 6. Also, the kit may alternatively or additionally comprise a plurality of front parts 7 and / or a plurality of rear parts 9. These parts can then differ in their dimensions, materials and / or type of external thread, such as pitch, flank height, etc., in order to be able to assemble a mounting screw from the kit, the best possible adapted to the particular conditions of use by the user.

LIST OF REFERENCES:

100, 200, 300, 400, 500,

 600, 700, 800, 900, 1000 mounting screw

 1 band parts

 2 multi-chamber profile

 3 external thread of the threaded area

4 threaded area of the mounting screw

5, 6 walls of the multi-chamber profile

7 front part

 7a thread of the front part

 8 middle part

 9 back part

 9a thread of the rear part

 10 outer wall of the multi-chamber profile

1 1 temperature insulation area

 12 insulating bars

 13, 13 'axial projections

 14, 14 'recesses

 15 radial projections

 15 'Radialausnehmungen

 16 rear end

 17 Radial projection or head

 18 distance range

 19 key area

 20 cone surface

 21 friction device

 22 bore

 23 tapped hole

 24 bore areas

 25 threaded piece

26 central hole '28 female thread area', 28 'male thread

 Radial prominence, 31 paragraphs

distance

 diameter

length

 Kerndurchnnesser head diameter flank height

 distance

Claims

Patent claims: Mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) for attaching hinge parts (1) to a multi-chamber profile (2), with one with external thread (3) provided thread area (4), which has a length (L) that is greater than the distance (A) between two adjacent walls (5, 6) of the multi-chamber profile (2), the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) has a front part (7), viewed in the screwing direction, which includes a thread (7a) and is preferably made of a metallic material, characterized in that that the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) has a middle part (8) made of a heat-insulating material, for example plastic, and a rear part with an outer wall (10) of the multi-chamber profile Coming into contact part (9), which comprises a thread (9a) and is preferably made of a metallic material. Mounting screw according to claim 1, characterized in that the middle part (8) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) completely separates the front part (7) from the rear part ( 9) separates. Mounting screw according to claim 1 or 2, characterized in that the rear part (9) and the front part (7) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900) form-fit with the middle part (8) are connected. Mounting screw according to claim 3, characterized in that the middle part (8) of the mounting screw (100, 200, 300, 400, 500, 600) is produced by injection molding and is injected into the rear and front parts (9, 7). 5. Mounting screw according to claim 3 or 4, characterized in that the middle part (8) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900) has axial projections (13, 13 '), which protrude into complementary recesses (14, 14') of the front and rear parts (7, 9). 6. Mounting screw according to claim 5, characterized in that the axial projections (13, 13 ') have a polygonal, preferably hexagonal cross section. 7. Mounting screw according to claim 5 or 6, characterized in that the axial projections (13, 13 ') have radial projections (15) which protrude into complementary radial recesses (15') of the front and rear parts (7, 9). 8. Mounting screw according to claim 1 or 2, characterized in that the rear part and the front part of the mounting screw are cohesively connected to the middle part. 9. Mounting screw according to claim 8, characterized in that the cohesive connection is produced by ultrasonic welding. 10. Mounting screw according to claim 1 or 2, characterized in that the rear part (9) and the front part (7) are non-positively connected to the middle part (8). 1 1 . Mounting screw according to claim 10, characterized in that the non-positive connection is effected by a screw connection. 12. Mounting screw according to claim 1 1, characterized in that the middle part (8) is designed as a threaded piece (25). 13. Mounting screw according to claim 12, characterized in that the threaded piece (25) comprises two threaded areas (27, 28) which engage in complementary threaded areas (27', 28') of the rear part (9) and the front part (7). . 14. Mounting screw according to claim 13, characterized in that the thread areas (27, 28) of the threaded piece (25) are designed as internal threads, the thread areas of the rear part (9) and the front part (7) are designed as external threads. 15. Mounting screw according to one of claims 1 to 14, characterized in that a wrench surface (19) is provided for selectively engaging a turning tool. 16. Mounting screw according to claim 14, characterized in that the wrench surface (19) is accessible from the rear end as seen in the screwing direction. 17. Mounting screw according to claim 16, characterized in that the wrench surface (19) is provided on the rear part (9). 18. Mounting screw according to claim 16 or 17, characterized in that the wrench surface (19) is provided on the front part (7). 19. Mounting screw according to one of claims 16 to 18, characterized in that the wrench surface (19) is provided on the middle part (8). 20. Mounting screw according to claim 18 or 19, characterized in that the wrench surface extends through the front end of the front part (7) as seen in the screwing direction. 21. Mounting screw according to one of claims 1 to 20, characterized in that the external thread (7a) of the front part (7) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) is self-forming . 22. Mounting screw according to one of claims 1 to 21, characterized in that the front region of the front part (7) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) tapers. 23. Mounting screw according to one of claims 1 to 24, characterized in that the rear part (9) of the mounting screw (700, 800, 900) comprises a threaded hole (23) opening into the rear end face. 24. Mounting screw according to claim 12, characterized in that the rear part (9) of the mounting screw (700, 800, 900) has a radial projection (17) at its rear end. 25. Mounting screw according to one of claims 1 to 24, characterized in that the ratio between the outside diameter and the core diameter of the external thread in the non-conical area is <1.1. 26. Mounting screw according to one of claims 1 to 25, characterized in that the middle part (8) of the mounting screw (100, 200, 300, 400) consists of preferably glass fiber reinforced and / or carbon fiber reinforced plastic and the plastic is a polymer or a duromer . 27. Kit of a mounting screw (1000) with a front part (7), a rear part (9) and a middle part (8), which can be screwed to the front and rear parts (7) to provide the mounting screw, characterized that the kit has a plurality of optionally usable front parts (7) and / or a plurality of optionally usable rear parts (9), which differ in their dimensions and / or Materials and / or external threads differ, and / or a plurality of optionally usable middle parts (8). 28. Kit according to claim 27, characterized in that the mounting screw has the features of one of claims 1 1 to 26. 29. Arrangement, with a multi-chamber profile (2) comprising an outer wall (10) and at least one inner wall (6), which is spaced from the outer wall (10) via a temperature insulation area (11), and with a mounting screw (100, 200 , 300, 400, 500, 600, 700, 800, 900, 1000) according to one of claims 1 to 26, characterized in that the rear part (9) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) engages with the outer wall (10) and the front part (7) of the mounting screw (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) engages with the inner wall . 30. Arrangement according to claim 29, characterized in that the multi-chamber profile (2) comprises an inner wall (5) parallel to the outer wall (10), and the rear part (9) of the mounting screw with the outer wall (10) and the inner wall (5) is engaged.