Connection of a PVC window frame with aluminium facing shells or frames

Abstract

A composite frame for a window or door comprises an outer cover frame made of metal profiles connected to each other at the corners, or at least one outer metal cover shell (2, 3), and a base frame made of plastic profiles (5, 6) welded together at the miter joints. The outer cover frame or the at least one outer metal cover shell (2, 3) is connected to the base frame by means of connecting clips (1). The connecting clip (1) has a plate (7) that is at least approximately flat, with expanding springs (8, 9) spaced apart on both sides of the plate (7). An elastic spring (10) is arranged on one side of the plate (7). Bores (12, 13) are arranged in the outer surfaces (14, 15) of the plastic profiles (5, 6). The metal profiles or outer metal cover shells (2, 3) are connected to the plastic profiles (5, 6) by means of the connecting clips (1).

Description

[0001] The invention relates to a connection of a PVC window frame with aluminum facings or frames. Technical area

[0002] PVC has established itself as a material for frame profiles used in the manufacture of windows and doors in many markets due to its efficient processing and product durability. PVC profiles are generally mitered and welded together at the mitered joint to form a frame. At least at larger processors, the production of window and sash frames from PVC profiles usually takes place on complex production lines in which the individual work steps are carried out one after the other in a timed sequence. To enable efficient production, no individual work step can take significantly longer than others, as otherwise the entire production line would have to operate at a correspondingly slower speed.

[0003] The use of facings or frames made of metal profiles, especially aluminum profiles, is common practice for both wooden and plastic windows. Covering plastic profiles with aluminum facings or frames is primarily done for aesthetic reasons, although the aluminum facings or frames can be anodized, painted, or otherwise coated in various colors. State of the art

[0004] Connecting clips are known in which a spreading spring is arranged on one side; this is attached, preferably glued, to a plastic or wooden profile. Furthermore, the connecting clip has a hole through which a screw, preferably with a sharp point and sharp-edged thread, is inserted to screw the connecting clip to the base body. This rigidly connects the connecting clip to the base body. This requires very precise manufacturing during assembly. If at least three connecting clips are involved in the assembly of an aluminum profile, they must be arranged as precisely as possible in a straight line. To compensate for deviations from this, the connection between the connecting clips and the shells must have corresponding tolerances.The same applies to displacements due to thermal expansion, since the shells and the plastic or wooden profiles have different thermal expansion coefficients.

[0005] DE 7935702 U1 discloses a plastic window with light metal cover profiles attached to the exterior. The connection is made via retaining clips that engage with the plastic profiles or cover profiles via locking tabs and anchoring claws. Both the locking tabs and the anchoring claws have flat surfaces that engage in parallel. This allows only straight-line sliding.

[0006] DE 3912135 A1 shows clip connectors for attaching metal profiles to wooden frames that are fixed at a fixed height. The clip connectors are inserted into a groove on each side. The attachment points to the wooden frame on one side and the metal profile on the other side are arranged on a straight line. If the grooves are straight, the two parts to be connected are aligned along this straight line.

[0007] DE 7904496 U1 discloses a wooden frame with a metal frame. One connector allows for twisting, so only two connectors can be aligned. However, if there are three connectors that are not screwed in a straight line, this cannot be compensated.

[0008] DE 19949145 C1 discloses a window or door frame with a rotatable connecting element featuring a toothing into which a tool with corresponding toothing engages. The connector also has an inclined surface. Using the tool, the connector can be rotated, creating a force-locking connection via the inclined surface.

[0009] US 10030435 B2 discloses a door with a plastic frame in which panels are used instead of a glass pane. An inner panel is connected to a bracket on the side facing away from the building's interior and is thus clamped over the overlap.

[0010] WO 2004 / 087340 A2 shows a connector for doors and windows, which can be inserted into a slot with a central, larger round opening and moved horizontally, whereby the connector is firmly fixed in the two edge areas of the narrow slot. Task

[0011] The object of the present invention is therefore to provide a generic composite frame for a window or a door with a base frame made of plastic profiles in conjunction with metal profiles for covering the plastic profiles, in which manufacturing tolerances can be compensated for in the combination. Description of the invention

[0012] The invention solves this problem by a composite frame with a connecting clip according to independent claim 1.

[0013] A composite frame according to the invention for a window or door comprises a base frame made of plastic profiles welded together in the miter area and an outer facing frame made of metal profiles connected together in the corner area or, alternatively, at least one outer metal facing shell. As a rule, all plastic profiles of the base frame are covered with metal on the outside. The facing frames or facing shells each have an outer facing surface which, in the installed position, runs vertically towards the outside of the building. The base frame also has a plastic profile outer surface which, in the installed position, runs vertically towards the outside of the building. The outer facing frame or the at least one outer metal facing shell are connected to the base frame via connecting clips.

[0014] According to the invention, this is achieved via a connecting clip that engages via holes in the base profile and is connected via locking grooves in the outer facing frame or at least one outer metallic facing shell. This allows for a secure connection that can simultaneously compensate for manufacturing tolerances and heat-induced movements. The outer side, in particular, is subject to significant temperature fluctuations, so that tensions can arise due to the different thermal expansion coefficients between, in most cases, PVC and aluminum.

[0015] The connecting clip has a plate that is at least approximately flat; this is usually completely flat, but it can also be grooved or slightly curved.

[0016] A spreading spring is arranged on both sides of the plate (not including the plate edges). The two spreading springs are spaced apart by a certain distance a. An elastic spring is arranged on one side of the plate. The elastic spring is connected to the plate via a web. The elastic spring runs away from the web and approaches the plane of the plate up to a certain distance b. This means that the distance between the elastic spring and the plate tends to decrease, starting from the web. It is irrelevant whether the spring runs again in the other direction at the end to make it easier to thread in. The web is arranged at a distance c from the second spreading spring.

[0017] Holes are arranged in the outer surfaces of the plastic profiles at least approximately at a distance c. The description of the exemplary embodiment will address the permissible deviation from the exact distance a or c. The metal profiles or outer metallic facings have locking grooves on the side opposite the outer surfaces of the facings. Since the metal profiles are usually extruded profiles, the locking grooves run in the extrusion direction. The connecting clips are connected by clipping through the holes via the web in connection with the elastic spring and the second expanding spring on the side of the elastic spring. Furthermore, the connecting clips are connected to the metal profiles or outer metallic facings by means of the first expanding springs on the side facing away from the elastic spring via the locking grooves.

[0018] Advantageous embodiments result from the features of the dependent claims.

[0019] According to a preferred embodiment of the invention, the distance b is at least slightly smaller than the wall thickness of the outer surface of the plastic profile. This ensures that, after insertion of the connecting clip, it is elastically clamped to the plastic profile due to elastic deformation.

[0020] Advantageously, the first hole, the elastic spring, and the web are matched to each other in such a way that the elastic spring and web can be guided through the first hole with some clearance; this facilitates assembly. The clearance is preferably 1 to 3 mm.

[0021] Optionally, the second hole and second expansion spring are matched in such a way that the second expansion spring can be guided through the second hole when compressed, and after insertion, the second expansion spring rests in the second hole under elastic tension. This ensures a tight fit.

[0022] Advantageously, the second expansion spring has a through-hole. After insertion into the second hole, the second expansion spring can be secured in the through-hole using a screw. This prevents the second expansion spring from being compressed and prevents the connecting clip from popping out of the hole under tension.

[0023] Preferably, the first spreading spring and the locking grooves are matched to one another in such a way that the first spreading spring can be inserted into the locking grooves in the compressed state and, after insertion, the first spreading spring rests in the locking groove under elastic tension.

[0024] In a preferred embodiment, the first and / or second expansion springs have at least approximately a rotationally symmetrical basic structure with slots parallel to the rotational axis. This rotationally symmetrical basic structure allows the expansion springs to be inserted particularly well into equally rotationally symmetrical bores.

[0025] If the first and second holes have the same diameter, the connecting clip can be inserted in two directions.

[0026] Preferably, the distance a is at least approximately equal to the distance c. The first spreading spring and the web connecting the elastic spring to the flat plate are thus equidistant from the second spreading spring and are preferably arranged on an axis opposite one another on the two sides of the plate.

[0027] Optionally, the inner surface of the plastic profiles opposite the outer surface of the plastic profiles can also be connected via the connecting clips according to the invention to an inner facing frame made of metal profiles connected to one another in the corner area or to at least one inner metallic facing shell.

[0028] A connecting clip for a composite frame according to the invention has an at least approximately flat plate, with a spreading spring arranged on each side of the plate at a distance a. An elastic spring is arranged on one side of the plate. The elastic spring is connected to the plate via a web, and the elastic spring moves away from the web and approaches the plane of the plate to a distance b. Short description of the drawing

[0029] The invention is explained in more detail below using exemplary embodiments and the drawings. In the drawings: Fig. 1 shows a section through a composite frame according to the invention; Fig. 2 shows a connecting clip in perspective view; Fig. 3 shows the same connecting clip in another three-dimensional view; Fig. 4 shows the same connecting clip in plan view; Fig. 5 shows the connecting clip from Figure 4 in side view; Fig. 6 the connecting clip from Figure 4 in opposite view; Fig. 7 the connecting clip from Figure 4 in front view; Fig. 8 a sash plastic profile before inserting the connecting clip, Fig. 9 the sash plastic profile from Figure 8 In the first step when inserting the connecting clip, Fig. 10, the sash plastic profile Figure 8 In the second step when inserting the connecting clip, Fig. 11, the sash frame plastic profile Figure 8 after inserting the connecting clip. Fig. 12 the sash frame plastic profile with connecting clips made of Figure 11 after inserting the screw and Fig. 13 a cut - as in Figure 1 drawn - for connecting the sash frame plastic profile with a facing shell using the connecting clip.

[0030] Identical reference symbols in different figures have the same meaning. Not all reference symbols are shown in all figures.

[0031] Figure 1shows a section through a window or door frame with a sash frame plastic profile 5 and a frame plastic profile 6. Seals 4 are located at the contact points between the sash and frame. Glazing (not shown) is inserted into the rebate of the sash frame. The frame is connected to the masonry. The window or door frame is inserted in such a way that the sash frame can be opened towards the interior of the building I.

[0032] Both the cover frame and the sash frame are made of plastic profiles 5, 6 welded together in the mitre area and each have a plastic profile outer surface 14, 15 which, in the installed position, is directed vertically towards the outside of the building A.

[0033] On the building's exterior side A, the sash frame's plastic profile 5 and the outer frame's plastic profile 6 are covered with facing panels 2, 3. Alternatively, facing panels made of metal profiles connected at the corners can be used. The facing panels 2, 3 are extruded aluminum profiles. The facing panels 2, 3 are designed such that they have facing outer surfaces 16, 17 facing the building's exterior side A, which, when installed, run vertically toward the building's exterior side A.

[0034] The outer metallic facing shells 2, 3 have locking grooves 18 on the side opposite the facing outer surfaces 16, 17.

[0035] The outer facing shells 2, 3 are connected to the plastic profiles 5, 6 via connecting clips 1. The connecting clip 1 according to the invention, which is Figures 2 and 3 perspective and in the Figures 4 to 7shown in various top views, has a flat plate 7. On both sides of the plate 7, a first and second spreading spring 8, 9 are arranged. The spreading springs 8, 9 are spaced apart by a distance a; this distance a is shown in the Figures 5 and 6 On one side of the plate 7, an elastic spring 10 is arranged at a distance c from the second spreading spring 9, this elastic spring 10 being connected to the plate 7 via a cylindrical web 11 running perpendicular to the plate 7. The distance a is the distance between the centers of the first and second spreading springs 8, 9. The distance c is the distance between the center of the second spreading spring 9 and the center of the cylindrical web 11. The elastic spring 10 leads away from the web 11 and approaches the plane of the plate 7 up to a distance b. The distance b is in Figure 5The distance b is slightly smaller than the wall thickness of the plastic profile outer surface 14, 15. In the illustrated example, the two distances a and c are equal; however, this is not mandatory.

[0036] The connecting clips 1 are connected to the sash frame plastic profile 5 and the frame plastic profile 6 via the web 11 in conjunction with the elastic spring 10 and the second spreading spring 9 on one side of the plate 7. This is done by clipping through holes 12, 13 in the sash frame plastic profile 5 and the frame plastic profile 6. The holes 12, 13 are particularly in Figure 8 The distance between the two holes 12, 13 corresponds to the distance c between the second expanding spring 9 and the cylindrical web 11.

[0037] The connecting clips 1 are also connected to the outer facing shells 2, 3 via first spreading springs 8 on the side facing away from the elastic spring 10 by engaging in the locking grooves 18.

[0038] The first bore 12 and the elastic spring 10 as well as the web 11 are matched to one another in such a way that the elastic spring 10 with the web 11 can be guided through the first bore 12 with play, preferably 1 to 3 mm.

[0039] The second bore 13 and the second expansion spring 9 are coordinated such that the second expansion spring 9, when compressed, can be guided through the second bore 13. After insertion, the second expansion spring 9 rests under elastic tension in the second bore 13. The connecting clip 1 can be rotated in the second bore 13; this rotational movement is limited by the play of the web 11 in the first bore 12.

[0040] In the illustrated embodiment, the first bore 12 is exactly the same size as the second bore 13. Therefore, the direction in which the connecting clip 1 is inserted is irrelevant. Accordingly, the elastic spring 10 with the cylindrical web 11 could also be inserted into the second bore 13, while the second expansion spring 9 is inserted into the first bore 12.

[0041] The second expansion spring 9 has a through-hole 19. After insertion in the second bore 13, the second expansion spring 9 can be fixed in the through-hole 19 by means of a screw 20; this is shown in Figure 12 shown.

[0042] The first spreading spring 8 and the locking grooves 18 are matched to one another in such a way that the first spreading spring 8 can be inserted into the locking grooves 18 of the outer metallic facing shells 2, 3 in the compressed state and the first spreading spring 8 rests under elastic tension in the locking groove 18 after insertion.

[0043] The first and second spreading springs 8, 9 have at least approximately a rotationally symmetrical basic structure with slots parallel to the axis of rotation.

[0044] The assembly of the connecting clip 1 in the outer surface 14 of the sash frame plastic profile 5 is shown in the Figures 8 to 12shown. Two holes 12, 13 are arranged at a distance c in the outer surface 14 of the plastic profile 5. Hole 12 is the same size as hole 13. The elastic spring 10 must be guided through hole 12, and then the web 11 is positioned with play in this hole 12. This requires that the hole 12 must have a larger diameter than the web 11, which is round in this embodiment.

[0045] In the assembled state, the connecting clip 1 is rotatably connected to the sash plastic profile 5 via the second expansion spring 9 in conjunction with the second bore 13, and with play via the web 11 in conjunction with the elastic spring 10 with the first bore 12. This allows movement of the web 11 in the first bore both in the extension direction of the sash plastic profile 5 and in the vertical direction.

[0046] Figure 8shows the outer surface 14 of a sash frame plastic profile 5. In the outer surface 14 of the plastic profile 5, two holes 12, 13 are arranged at a distance c, ideally at the same horizontal level.

[0047] Figure 9 to Fig 12 show how the connection of the connecting clip 1 with the sash plastic profile 5 is made. For this purpose, the elastic spring 10 is first inserted into the first hole 12, whereby the main extension direction of the flat plate 7 is approximately perpendicular to the outer surface 14; this is shown in Figure 9 Then, as in Figure 10 shown - the connecting clip 1 is moved such that the flat plate 7 is rotated in a position parallel to the outer surface 14 and the second spreading spring 9 is pressed into the second bore 13.

[0048] The web 11 is then located with play in the first hole 12. The second expansion spring 9 is centered by its conical head and then compressed so that it can be inserted into the second hole 13 and then expands again so that the second expansion spring 9 sits firmly in the second hole 13. The flat plate 7 then lies flat on the outer surface 14; this is in Figure 11 to see. Will now - as in Figure 12 shown - a screw 20 is screwed into the through-hole 19 of the second spreading spring 9, the spreading spring 9 can no longer be compressed and the connecting clip 1 can no longer be pulled out of the second bore 13.

[0049] The play of the web 11 in the first hole 12 allows the connecting clip 1 to rotate slightly, with the second expanding spring 9 then serving as the pivot point. The rotating movement of the connecting clip 1 allows the first expanding spring 8 to move slightly up or down.

[0050] Now the facing shell 2 can be placed on the plastic profile 5 by slipping the locking groove 18 over several first expanding springs 8, which are arranged in a row on the plastic profile 5. When the facing shell 2 is pressed down, the first expanding springs 8 are centered by their conical head and then compressed and pressed into the locking groove 18, where the expanding springs expand again, thus creating a firm connection. This is Figure 13 shown. In Figure 13 The elastic spring 10 is depicted as if it were not elastically bending. It can be seen that the distance b is smaller than the material thickness of the plastic profile 5. In reality, the elastic spring 10 bends elastically and clamps the connecting clip 1 to the plastic profile 5, thus preventing rattling.

[0051] If the two holes 12, 13 are not drilled at exactly the same horizontal level during production and / or there is a height offset between individual connecting clips 1, the "floating" bearing of the connecting clips 1 can compensate for this offset without causing any tension.

[0052] The invention is not limited to the embodiment.

[0053] Thus, the two holes 12, 13 can also have different diameters; however, in this case, the connecting clip 1 can no longer be installed in both directions. Instead, care must be taken to ensure that the second expansion spring 9 has approximately the same diameter as the hole into which the second expansion spring 9 is inserted, and that the cross-section of the web 11 can be inserted into the other hole with some clearance.

[0054] In the exemplary embodiment, the distance a between the centers of the first and second expansion springs 8, 9 and the distance c between the center of the second expansion spring 9 and the center of the cylindrical web 11 are equal. The first expansion spring 8 and the web 11 are located on a common axis.

[0055] However, if the distance a between the centers of the first and second expansion springs 8, 9 is greater than the distance c between the center of the second expansion spring 9 and the center of the cylindrical web 11, a larger height offset can be compensated. However, the flat plate 7 must then be longer than in the example. If, however, the distance a is smaller than the distance c, a smaller height offset can be compensated.

[0056] The figures show the lower profiles of a frame. A frame typically consists of a bottom, top, left, and right side. While the two holes on the top are also arranged horizontally next to each other, the two holes on the two sides are arranged vertically one above the other.

[0057] Plastic window profiles clad with metal profiles or shells always have a cladding on the outside. A cladding can also be arranged on the inside using connecting clips according to the invention.

[0058] What is essential to the invention is that the connecting clip 1 is rotatably mounted in a plastic profile 5, 6 via the second expanding spring 9 in the second bore 13, while the web 11 of the elastic spring 10 limits this rotational movement. The connecting clip 1 is also connected to the facing shells 2, 3 via the first expanding spring 8 and the locking grooves 18. The rotational movement of the connecting clip 1 thus causes the first expanding spring 8 to be slightly displaced horizontally and vertically. The first expanding spring 8 rotates slightly in the locking groove 18 and is simultaneously displaced slightly within it. Since the web 11 of the elastic spring 10 only has a limited range of movement in the first bore 12, the rotational movement is limited, which is why the first expanding spring 8 is only slightly displaced horizontally and vertically.If the movement space were larger, there would be a risk that the connection between the plastic profiles 5, 6 and the facing shells 2, 3 would become too flexible overall. The device according to the invention, however, compensates for typical tolerances, particularly in manually drilled holes 12, 13. legend

[0059] 1Connecting clip 2Facing shell 3Facing shell 4Seal 5Plastic profile 6Plastic profile 7Flat plate 8First expanding spring 9Second expanding spring 10Elastic spring 11Web 12First hole 13Second hole 14Plastic profile outer surface 15Plastic profile outer surface 16Facing outer surface 17Facing outer surface 18Locking grooves 19Through-cutout 20Screw 21

Claims

1. Composite frame for a window or a door, comprising - an outer facing frame composed of metal profiles, which are connected to one another in the corner region, or at least one outer metal facing shell (2, 3), which each have a facing outer surface (16, 17) which, in the installed position, is oriented so as to run vertically towards the outside A of the building, - a base frame composed of plastic profiles (5, 6), which are welded to one another in the mitre region and which each have a plastic-profile outer surface (14, 15) which, in the installed position, is oriented so as to run vertically towards the outside A of the building, - wherein the outer facing frame or the at least one outer metal facing shell (2, 3) are connected to the base frame by way of connecting clips (1), characterized in that - the connecting clips (1) each have an at least approximately flat plate (7), - a first or second expanding spring (8, 9) is arranged one on each of the two sides of the plate (7) spaced apart at a distance a, - an elastic spring (10) is arranged on one side of the plate (7), wherein the elastic spring (10) is connected to the plate (7) by way of a link (11), wherein the link (11) is arranged spaced apart at a distance c from the second expanding spring (9), and the elastic spring (10) approaches the plane of the plate (7) down to a distance b so as to lead away from the link (11), - holes (12, 13) are arranged in the outer surfaces (14, 15) of the plastic profiles (5, 6) at least approximately at the distance c, - the metal profiles or outer metal facing shells (2, 3) have locking grooves (18) on the side opposite the facing outer surfaces (16, 17), - wherein the connecting clips (1) are connected by way of the link (11) in connection with the elastic spring (10) and by way of the second expanding spring (9) on the side of the elastic spring (10) by clipping through the holes (12, 13) in the plastic profiles (5, 6) and - the connecting clips (1) are connected to the metal profiles or outer metal facing shells (2, 3) by way of the locking grooves (18) by means of the first expanding springs (8) on the side facing away from the elastic spring (10).

2. Composite frame (2) according to Claim 1, characterized in that the distance b is at least somewhat smaller than the wall thickness of the plastic-profile outer surface (14, 15).

3. Composite frame (2) according to Claim 1 or 2, characterized in that the first hole (12) and the elastic spring (10) and the link (11) are matched to one another such that the elastic spring (10) together with the link (11) can be led through the first hole (12) with play, preferably 1 to 3 mm.

4. Composite frame (2) according to one of Claims 1 to 3, characterized in that the second hole (13) and second expanding spring (9) are matched to one another such that the second expanding spring (9) can be led, in the compressed state, through the second hole (13) and, after insertion, the second expanding spring (9) is in contact, under elastic stress, in the second hole (13).

5. Composite frame (2) according to Claim 4, characterized in that the second expanding spring (9) has a through-hole (19) and, after insertion in the second hole (13), the second expanding spring (9) is fastened by means of a screw (20) in the through-hole (19).

6. Composite frame (2) according to one of Claims 1 to 5, characterized in that the first expanding spring (8) and the locking grooves (18) are matched to one another such that the first expanding spring (8) can be inserted, in the compressed state, into the locking grooves (18) and, after insertion, the first expanding spring (8) is in contact, under elastic stress, in the locking groove (18).

7. Composite frame (2) according to one of Claims 1 to 6, characterized in that the first and / or second expanding spring (8, 9) have at least approximately a rotationally symmetrical basic structure with slots parallel to the axis of rotation.

8. Composite frame (2) according to one of Claims 1 to 7, characterized in that the first hole (12) and the second hole (13) have the same diameter.

9. Composite frame (2) according to one of Claims 1 to 8, characterized in that the distance a is at least approximately equal to the distance c, wherein preferably the first expanding spring (8) and the link (11) are arranged opposite one another on the two sides of the plate (7) on an axis.

10. Composite frame (2) according to one of Claims 1 to 9, characterized in that an inner facing frame composed of metal profiles, which are connected to one another in the corner region, or at least one inner metal facing shell is connected to the plastic-profile inner surface of the plastic profiles (5, 6), which is opposite the plastic-profile outer surface (14, 15), by way of connecting clips (1).

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