AT523544B1 - Plastic-metal window system - Google Patents

Abstract

The invention relates to a plastic-metal window system (1) with a frame (2) made of plastic and an attached shell (3) made of metal and with glazing (4), the frame (2) being formed from extruded plastic hollow profiles (21) is, and wherein the shell (3) is attached to the frame by means of snap-in retaining elements (23). This window system (1) is characterized in that the latching retaining elements (23) are extruded onto the plastic hollow profiles (21) and are thus formed in one piece with them. The invention therefore develops a generic plastic-metal window system in such a way that it can be installed more easily and allows greater freedom of design.

Description

description

PLASTIC-METAL WINDOW SYSTEM

The invention relates to a plastic-metal window system with a frame made of plastic and an attached shell made of metal and with glazing, wherein the frame is formed from extruded plastic hollow profiles, and wherein the shell is attached to the frame by means of latching elements.

Under plastic-metal window systems according to the present invention is understood to mean individual window arrangements with only one glazing, as well as window systems in element construction with several window arrangements arranged next to one another. This also includes window constructions of all sizes as well as French doors and the like. In principle, various types of construction of window arrangements have become known from practice. In addition to pure wooden windows, which are still frequently used, composite construction methods have increasingly conquered a market segment. Such composite windows are mostly designed as wood-metal windows or plastic-metal windows. The metal used for the outer shell is usually aluminum or an aluminum alloy. The use of a metal shell on the outside has the advantage that this frame surface, which is exposed to weathering, is particularly well protected. However, a certain amount of effort is associated with the connection of materials that are so different in terms of their physical properties. The present invention relates to window systems in which a metal shell is placed on plastic hollow profiles.

An example of such a composite window is known from DE 10 2005 021 934 A1. This window arrangement has a frame and sash frame designed in a conventional manner, which are each constructed from extruded plastic hollow profiles. These frame bodies meet all the requirements in a known manner in order to be able to give the window sufficient strength or stability. In addition to this, however, a metal panel is provided on the outside, which can be coupled to it via a latching connection in order to serve as additional weather protection. This design has the advantage that the customer can choose between a purely plastic window and a plastic-metal window. The metal facings are therefore additional elements that can be purchased for an extra charge.

From DE 102 02 812 C1, a further construction of a composite window has become known. This document relates in particular to a thermally insulated plastic window. The metal shells on the outside are designed in several parts for this purpose and have a cavity which is foamed with a plastic. The coupling of these insulated metal shells takes place on the sash frame via hook webs formed thereon. These engage in an undercut groove in the outer shell. Holders are screwed to the frame in a conventional manner, which also produce a locking connection with undercut grooves on the insulated frame cover.

[0005] In any case, this design takes up the connection method common in practice between these different materials on the frame and provides for the use of latching brackets on an otherwise conventional frame profile. In other words, it would also be possible to do without the outer shells and to use the frame for a purely plastic window.

The construction method emerging from DE 102 02 812 C1 has the disadvantage that a considerable amount of effort is required for positioning and securing the latching holder on the plastic frame. The assembly of this composite window is therefore complex.

In addition, such plastic-metal window systems are often used in larger industrial or office buildings which also contain larger-sized glazing units in the facade. The conventional systems consistently provide for individual plastic windows to be arranged next to one another and rigidly connected to one another. In the course of

According to the invention, however, it has been shown that in practice it would be desirable, similar to conventional wooden windows, to arrange an element construction with setting or transom profiles to subdivide the glazing. The known plastic-metal window systems do not offer a solution for this, however, since they are based on the construction of conventional plastic windows in the construction of the frame elements.

The invention is therefore based on the object of developing a plastic-metal window system of the generic type in such a way that it can be installed more easily and allows greater design freedom.

This object is achieved by a plastic-metal window system with the features of claim 1. This is characterized in particular by the fact that the locking holding elements are extruded onto the plastic hollow profiles and are thus formed in one piece therewith.

According to the invention it was recognized that the assembly of such composite windows can be made significantly easier by turning away from the common frame construction. While the plastic blind frames in the prior art were designed in such a way that they can also be used without the metal shell, the invention now provides for these to be specially developed, so that they can hardly be used meaningfully without the outer shell, but a special one with the outer shell form advantageous composite construction.

In particular, it was recognized that the plastic material of the window frame is particularly well suited to extrude the locking retaining elements to the plastic hollow profiles, so that the assembly of separate holders can be dispensed with entirely. The corresponding processing steps can thus be omitted, which significantly accelerates the provision of the composite window. Furthermore, the additional effort for extrusion of the locking holding elements on the frame is extremely low, since this can be done in one go. In addition, this step can be carried out very inexpensively.

The window system according to the invention can thus be installed in a simple manner and very quickly. At the same time, the attached shell made of metal only has to be configured to match the latching holding sections in the coupling area. Apart from this, however, there are diverse design options. The plastic-metal window system according to the present invention thus also allows a large number of variants. As a further advantage, an investigation of a prototype of the present invention has shown that the inventive connection of the shell to the window frame results in an overall stiffer window system, so that the usual use of steel as a stiffening core in the window frame at least reduce or, depending on Window size and application, can even be avoided entirely. This not only saves material and thus costs, but also reduces the weight of the window system. This is particularly advantageous in the case of larger construction heights, some of which extend over two or more floors.

Advantageous developments of the plastic-metal window system according to the invention are the subject of the dependent claims.

Thus, the frame and the shell can be connected to one another by means of the locking holding elements with a game in a plane parallel to the glazing plane. In this way, the different thermal expansions due to the different material for the frame and the shell can be compensated for in a particularly simple manner. Depending on the dimensions of the window system, the play should be 2 mm or more. The game itself can be provided in a particularly simple manner due to the elasticity or flexibility of the locking holding elements. This is achieved in a particularly simple manner in that the latching retaining elements are formed from a softer material than the shell. Additionally or alternatively, the latching elements can be extruded onto the frame in the manner of a film hinge or in some other flexible manner.

If the plastic-metal window system is provided with fixed glazing, glazing can be held by the shell on the frame. The shell therefore not only has a purely visual function and / or protects the frame from the effects of the weather,

but also a function that holds the glazing. Separate retaining elements for the glazing are not required. Similarly, in the case of a window sash, a shell can also hold the glazing if the window sash is formed from an actual sash analogous to the frame with an outer (or also inner) shell.

Furthermore, according to a further development of the invention, several window elements can be combined in a frame which is subdivided by setting profiles and / or transom profiles. This is achieved in that the frame elements according to the present invention are not designed on the outside as the actual external closure of the window, but rather offer a coupling point for the metal shell, which results in greater freedom of design. This also makes it possible, with significantly less effort, to subdivide glazing and provide suitable coupling points for the metal panel. A window system configured in this way can therefore be provided with an attractive appearance and, in particular, the visible frame elements or shells can be made slim. The usable glazing area is larger than with conventional construction methods, in which such subdivisions were not possible or several separate window arrangements were simply placed next to one another.

The window system can have at least one window element with fixed glazing. This is particularly advantageous in larger buildings, such as large office buildings or the like. In this way, an attractive facade design with a large glazing area can be achieved.

Alternatively or in addition, it is also possible that the window system has at least one window element in the form of a tilt and turn window with a sash frame and a metal shell serving as a sash panel, the sash frame being formed from extruded plastic hollow profiles with on-extruded locking retaining elements, and wherein the sash is fastened to the sash by means of the latching retaining elements. It is then possible according to the invention to also design window systems with tilt and turn windows in the assembly-friendly design shown. In particular, this allows an element construction with several window arrangements, which are designed as turn-tilt windows or also as a combination of turn-tilt windows with window arrangements with fixed glazing. This is a considerable advantage, especially when building large office buildings or the like.

Furthermore, it is advantageous if the locking holding elements are aligned such that an assembly direction of the shell or sash is essentially perpendicular to the glazing plane. This makes the assembly of the metal shell much easier, since the window system is particularly easy to access in this direction.

If the shell or sash of a window element consists of several interconnected shell sections and can be handled as one piece, assembly is further simplified. The shell can then be prefabricated separately and attached as one piece to the frame or casement frame. In addition, the individual shell sections are then connected to one another, so that in the assembled state they do not form any gaps at the joints, for example due to changes in length due to solar radiation or the like, which would be detrimental to the appearance of the window arrangement.

Preferably, the shell or wing panel can be connected to one another in the joint area of the shell sections via connecting pieces. A particularly stable coupling of the elements can then be achieved in this area.

If the connecting pieces are angular and are present as corner connectors, they produce a particularly reliable connection in the critical corner area of two shell sections. A gaping or twisting of the shell sections in the joint area can thus be prevented in a particularly reliable manner.

The connecting pieces can be positively connected to the shell sections by mechanical pressing. In this way, a reliable coupling can be established very quickly. In addition, very little manufacturing effort is associated with this.

Alternatively or in addition, the shell sections of a window element can also be welded to one another in the joint area. This significantly improves the strength at the joint. In particular, a twisting of the elements in this area can also be prevented particularly reliably in this way.

If the shell or wing panel is made of aluminum, a material that has been tried and tested for this application can be used.

The invention is explained in more detail below in exemplary embodiments with reference to the figures of the drawing. It shows:

1 shows a perspective detailed view of a plastic-metal window system according to the invention;

FIG. 2 shows a further perspective view of the window system according to FIG. 1; FIG. 3 shows a horizontal section through the window system according to FIG. 1;

4 shows a perspective illustration of a plastic-metal window system in a further embodiment;

[0031] FIG. 5 shows a perspective detailed view of yet another embodiment of a plastic-metal window system;

6 shows a vertical section through the lower area of the tilt and turn window from FIG. 5; and

FIG. 7 is a front view of the window system according to FIG. 5.

According to the illustration in FIG. 1, a plastic-metal window system 1 has a frame 2 and a shell 3. The frame 2 is designed as fixed glazing to accommodate glazing (not shown here), the shell 3 holding the glazing on the frame 2. The is composed of a plurality of plastic hollow profiles 21 and a post or setting profile 22, which is also made of plastic and designed as a hollow profile. The individual components of the frame 2 are conventionally welded to one another at the joints.

On the side facing the shell 3, the plastic hollow profiles 21 and the setting profile 22 have latching retaining elements 23 which are extruded in one go with them, i.e. are formed in one piece on the frame. The latching holding element 23 has two resilient holding webs 23 a, which protrude to the outside in order to be able to enter into a stable connection with the shell 3. At the same time, the holding webs 23a nevertheless have a certain elasticity or flexibility in order to ensure a certain play of the shell 3 with respect to the frame 2 in the glazing plane. With this play, which can be 2 mm or more, different degrees of thermal expansion between the frame 2 on the one hand and the shell 3 on the other hand due to the different materials with different coefficients of thermal expansion can be compensated for. The latching holding element 23 accordingly has a quasi T-shaped shape in cross section. They are dimensioned differently on the plastic hollow profiles 21 and 22, but their function is identical.

The shell 3 is essentially analogous to the frame 2, as can be seen in particular from FIG. It contains shell sections 31 which cover the frame 2 on the outside and protect it from the weather. No notching of the shell sections on the setting profile is necessary. The shell 3 is made of aluminum.

The shell sections each have, in cross section, a retaining groove 32 which forms an undercut space for receiving the retaining webs 23 a of the latching retaining elements 23. The holding webs 23a engage in the holding groove 32 and produce a latching connection. In Fig. 3, a horizontal section through the window system 1 is shown, from which the interaction of the latching retaining elements 23 with the retaining groove 32 is even clearer.

The individual shell sections 31 of the shell 3 are explained in a later

Connected to each other so that the shell 3 can be handled as one piece. During assembly, the shell 3 is accordingly picked up and fixed on the latching retaining elements 23. The direction of installation is perpendicular to the glazing plane, so that the shell 3 is simply pressed open from the outside until the retaining webs 23a engage in the retaining grooves 32 and lock the composite.

4 shows a perspective view of a window system 1 ° according to a second embodiment.

As can be seen from the illustration, the window system 1 ‘has no fixed glazing; instead, the glazing 4 is accommodated in two casement frames 5, each of which has a casement panel 6 made of metal.

The window system 1 ‘thus has two turn-tilt window elements, which are received in a common frame 2‘, with a setting profile 22 ‘or post is arranged as a separation between these. The frame 2 ‘is in turn constructed from plastic hollow profiles 21‘ and has a shell 3 ‘made of metal.

Each casement 5 is in turn composed of plastic hollow profiles 51, which have latching elements 52. As on the frame 2 ', these are provided with resilient hook webs 52a (see FIG. 6). The hook webs 52a or the latching holding element 52 are formed in one piece with the plastic hollow profiles 51 and are extruded onto them during manufacture and also provide the play already explained above in connection with the first exemplary embodiment.

The frame 2 ‘is adapted in a conventional manner to the receptacle of the sash 5, but has, as in the previous embodiment, locking retaining elements with retaining webs for locking a shell made of metal.

On the sash 5, the sash 6 is arranged, which is made up of shell sections 61 and holds the glazing 4. These each have a retaining groove 62 (cf. FIG. 6) for receiving the hook webs 52a. The shell sections 61 are connected to one another in a manner to be explained below and form a circumferential frame, the sash panel 6. This is thus designed in one piece and can in turn be attached to the sash frame 5 in one go and clipped onto it. The installation direction is likewise perpendicular to the plane of the glazing 4.

In Fig. 5, a plastic-metal window system 1 ″ is shown, which represents yet another embodiment of the present invention. In this design, a tilt and turn window is combined with a window element with fixed glazing. As can be seen from this, such window systems 1 ‘can also be implemented with the present invention. A frame 2 ″ is in turn connected to a 3 ″ shell made of metal. The casement 5 also has the casement 6.

6 shows a vertical section through the lower area of the tilt and turn window according to FIG overlap in a conventional manner. The shell 3 ″ and the sash 6 are in the manner explained in each case via latching elements 23 ″ and 52 with hook webs 23a ″ and 52a ″ in cooperation with retaining grooves 32 ″ and 62 on the frame 2 ″ and the sash 5 analogous to those described above Embodiments set. The sash 6 in turn holds the glazing 4 on the outside.

As can also be seen from FIG. 6, there is a window sill made of metal on the underside of the window system 1 ″, which, in cooperation with a sealing piece, produces a reliable seal in this area. The sealing piece is the subject of European patent EP 2 514 905 B1. The window sill is the subject of DE 10 2012 109 097 A1. With regard to further details of this lower end of the window system 1 ”, reference is made to the content of these documents.

7 shows a front view of the window system 1 ″ according to FIG. 5.

As indicated schematically, shell sections 31 ″ of shell 3 ″ are coupled to one another via corner connectors 33. These are received in the manner shown in FIG. 6 in a receiving groove in the respective shell section 31 ″ and are mechanically pressed with them. In the same way, the shell sections 61 of the wing panel 6 are connected to one another by means of corner connectors 63 (see FIG. 6).

The shell section 31 ″ for the setting profile 22 or 22 ‘is also coupled via connecting pieces 34 to the adjacent shell section 31 ″ of the window frame 2 or 2. The entire frame 2 can thus be handled as one piece.

In addition to the illustrated embodiment, the invention permits further design approaches.

It is thus possible to design the plastic-metal window system in such a way that only one window element is contained therein. This can be implemented both as a fixed glazing element or as a tilt and turn window or the like.

On the other hand, it is also possible that a window element is divided in the transverse direction, for which purpose a transom profile or a bolt is arranged. The invention can then also be applied in an analogous manner.

Furthermore, it is not absolutely necessary for the locking holding elements to be aligned in such a way that an assembly direction of the shell 3 is essentially perpendicular to the glazing plane. This applies equally to the wing panel 6. In particular, when the shell 3 or the wing panel 6 cannot be handled as one piece, but is present in individual elements, other assembly directions can also be implemented.

Accordingly, it is also not necessary for the shell 3 or the wing panel 6 to be connected to one another in the abutment area of the shell sections via connecting pieces. This can also be dispensed with.

On the other hand, it is also possible to alternatively or additionally weld the shell sections 31 and 61 to one another in the joint area. Such welding is more complex, but in the long run provides even greater dimensional stability and thus a better aesthetic appearance.

For the plastic hollow profiles 21 and 51, the known and proven plastics can be used. In particular, however, it is also possible to add recycled plastic components.

The shell 3 or wing panel 6 is made of aluminum in the embodiment shown. However, another metal, in particular light metal, can also be used.

In addition, it is possible to give the shell 3 or wing panel 6 a high-quality appearance or to design certain structures such as wood imitation or the like by powder coating or the like.

In the exemplary embodiments shown, the latching retaining elements 23, 23 ‘and 23 ″ also engage the retaining grooves 32, 32‘ and 32 ″. The locking holding elements 23, 23 ‘, 23 ″ form the male part, while the holding grooves 32, 32‘, 32 ″ form the female part. Alternatively, the latching elements can also be designed as female parts in a groove-like manner and encompass a corresponding male counterpart on the shell 3 from the outside.

Claims (13)

Claims 1. Plastic-metal window system (1 '") with a blind frame (2") made of plastic and an attached shell (3 ") made of metal as well as with glazing (4), whereby the blind frame (2") is made of extruded plastic hollow profiles ( 21; 21 °) and wherein the shell (3 ") is attached to the frame by means of snap-in retaining elements (23 °) which are extruded onto the plastic hollow profiles (21; 21 °) and are thus integrally formed with the plastic hollow profiles (21; 21 °), whereby the frame (2 '") and the shell (3") are connected to one another by means of the locking elements (23') with a play, characterized in that the frame (2 ") and the shell (3") by means of the locking elements ( 23 ") are connected to one another with a play of 2 mm or more in a plane parallel to the glazing plane, the play being given due to the elasticity or flexibility of the snap-in holding elements (23"), the snap-in holding elements (23 ") being U-shaped are, each with a snap hook n (23a ") and a support rib running essentially parallel to the locking hook (23a ') form the legs of the U-shaped locking holding element (23"), the support rib having a support surface for the holding groove (32 ") of the shell (3") which is aligned in a plane parallel to the glazing plane. 2. Plastic-metal window system according to claim 1, that play is given in that the latching retaining elements (23 ") are formed from a softer material than the shell (3"). 3. Plastic-metal window system according to claim 1 or 2, characterized by fixed glazing, with glazing being held by the shell (3 ‘") on the frame (2 "). 4. Plastic-metal window system according to one of claims 1 to 3, characterized in that several window elements are combined in a frame (2 "), which are divided by setting profiles (22; 22‘) and / or transom profiles. 5. Plastic-metal window system according to claim 4, characterized in that it has at least one window element with fixed glazing. 6. Plastic-metal window system according to claim 4 or 5, characterized in that it has at least one window element in the form of a tilt and turn window with a sash frame (5) and a shell made of metal serving as a sash panel (6), the sash frame ( 5) is formed from extruded plastic hollow profiles (51) with on-extruded locking retaining elements (52), and wherein the sash panel (6) is fastened to the sash frame (5) by means of the locking retaining elements (52). 7. Plastic-metal window system according to one of claims 1 to 6, characterized in that the locking holding elements (23 ", 52) are aligned such that an assembly direction of the shell (3") or sash (6) is substantially perpendicular to Glazing level is. 8. Plastic-metal window system according to one of claims 1 to 7, characterized in that the shell (3 '") or wing panel (6) of a window element consists of several interconnected shell sections (31, 61) and can be handled as one piece is. 9. Plastic-metal window system according to claim 8, characterized in that the shell (3 ‘") or sash panel (6) in the joint area of the shell sections (31, 61) is connected to one another via connecting pieces. 10. Plastic-metal window system according to claim 9, characterized in that the connecting pieces are angular and are present as corner connectors (33, 63). 11. Plastic-metal window system according to claim 9 or 10, characterized in that the connecting pieces are positively connected to the shell sections (31, 61) by mechanical pressing. 12. Plastic-metal window system according to one of claims 8 to 11, characterized in that shell sections of a window element are welded to one another in the joint area. 13. Plastic-metal window system according to one of claims 1 to 2, characterized in that the shell (3 ″) or sash panel (6) is made of aluminum. In addition 6 sheets of drawings