SK29594A3 - Composite framing profile - Google Patents

Abstract

A composite framing profile for assembly frames, formed by the coupling of an outer metal element (2), an inner wooden element (26) and an intermediate plastics element (32) connecting the two other elements, characterised in that: the intermediate plastics element (32) is provided with two wings (42, 64, 66) converging towards corresponding wings (14, 16) of the metal element (2) and snap engageable with these; the snap engagement between the respective wings is obtained through a rib (22) provided on the internal wall of each metallic wing (14, 16) and cooperating with a complementary groove (46) provided on the external wall of the plastics wing (42, 64, 66); means are provided to keep said plastics wings (42, 64, 66) in pre-loaded condition when the intermediate plastics element (32) is coupled to the metal element (2).

Description

Composite frame profile

The invention relates to a composite frame profile

Pterterian g tav. .ťQdhniky

Composite frame profiles are known to comprise an outer metal part having an aesthetic and weatherproof function, an inner wooden part having an aesthetic and thermal insulating function, and a central plastic part having a thermally insulating function and also elastically connecting the metal and wooden parts.

Such composite frame profiles have proven their effectiveness both in terms of aesthetic appearance by looking at the frame assembly from the inside as traditional wooden frames and in terms of functionality, demonstrate high resistance to atmospheric harmful substances due to the possibility of longitudinal sliding relative to each other. thermal expansion and ensure a sufficient degree of thermal insulation thanks to plastic parts that isolate the external environment from the external.

In general, the connection of the inner wooden part and the plastic part is rigid and is made by articulation and gluing, where the connection between the outer metal part and the plastic part is realized so that they engage together and thereby clamp due to cold deformation of the edges of the metal parts.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The present invention relates to a composite frame profile, wherein the connection between the outer metal part and the plastic part is realized by snapping the plastic part into the metal part.

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The known solution of this method of connection must simultaneously satisfy two contradictory requirements. On the one hand, the need to secure the snap connection requires that the plastic part is made of a material sufficiently flexible to provide the desired connection and, on the other hand, the need for maintenance of the connection requires the plastic material to be sufficiently rigid and ensure that unexpected disconnection will not occur the mechanical stresses to which the parts are subjected, in particular due to the differences between the thermal expansion of the metal and the wood.

Now, these contradictory requirements have been met by adopting a compromise solution, which in many cases has been empirically achieved by a series of experiments. However, this solution requires renouncing the optimal solution that could be achieved by trying to meet each requirement separately. Moreover, this compromise solution between the requirement for the elasticity of the plastic material to provide the connection with the metal material and its rigidity necessary to maintain this connection, Ba necessarily relates to temperature, so that a solution suitable for one temperature may not be effective for different temperatures .

WO-A-9110801 discloses a composite frame profile for a frame assembly which is formed by joining an outer metal part, an inner wooden part and a central plastic part that joins the two parts and has two wings converging towards the corresponding wings of the metal part and wherein the snap-fit connection is provided by a rib located on the inner wall of each metal wing and interacting with a groove that is on the outer wall of the plastic wing and wherein the means ensure that the wings are maintained in a preload state when the inner plastic part is connected by a metal part.

The main object of the present invention is to realize a composite frame

2

9289 a profile of the kind mentioned above which allows a wide snap-fit between the plastic part and the metal part during assembly of the composite profile over a wide temperature range corresponding to the different climatic conditions in which the frame must be used and ensures the durability of the connection when using this composite profile.

This object and other objects, as will be apparent from the following description, can be achieved, according to the present invention, by a composite frame profile formed by the B-connection of the outer metal part as described in the claim

First

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Overview of the figures in the drawing

The essence of the invention is further elucidated herein by reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of a composite frame for fixed doors and composite frame profiles related to the invention;

In FIG. 2 shows one of the composite profiles according to the second embodiment

3 shows a profile for a third embodiment

FIG. 4 shows a profile for a fourth embodiment

Fig. 5 is the same view as Fig. 1 of a composite frame profile for which other B-parts are used which provide better thermal insulation between the external and internal surroundings

EXAMPLES Composite frame connection of three elements. First made and taking into account

As can be seen in the drawings is

With the profile according to the invention, the formed element Ba consists of an aluminum extrusion shaped metal profile 2 ', which, to the minor differences which will become apparent from the description below, can be used to form a rigid frame or door of the frame assembly. It comprises a tubular body 4 / from which a flat leaf 6 extends and extends outwardly forming, in accordance with the present invention, the visible surface of the composite profile. A groove 8 is located at the free end of the wing 6.

9a & 9 facing the inside of the frame assembly and suitable for inserting, as will be explained below, the outer seal gasket 10 realized together with the double glass unit.

From the wall of the tubular body opposite the wing 6, four parallel wings extend more precisely, two outer 14, 16 and two inner 18.20. The two wings 14, 16 have, at the free end of the surface facing the outer wing, a triangular rib 22 shown in cross-section and an outer wing 14 positioned closer to the unit b by the double glazing 12, i.e. the outer wing shown at the top of the drawing. an additional rib 24 on an opposite surface to the rib 22

More specifically, each rib 22 has a larger side wall with less angularity with respect to the plane of the rib 22, and a smaller side wall perpendicular to the larger side wall.

The second element of the composite frame profile is a wooden profile 26. It is provided with two longitudinally parallel grooves 28 for receiving and joining the corresponding ribs 30 which are part of the central plastic part 32 which connects the metal profile 2 to the wooden profile 26 Each groove 28 has a trapezoidal section with a surface, i.e. a surface closer to the next rib 30, which is parallel b to the corresponding surface of the rib and to the outer surface inclined to converge with the inner surface towards the bottom of the same groove.

The timber profile 26 has a third longitudinal groove 34 suitable for receiving a flat gasket 36 which, when the profile forms a door, provides a seal between the door and the fixed frame, while providing a gasket between the frame and the fastening rail or wall 38.

The third element of the composite profile consists, as has already been said, of a plastic profile 32 connecting the outer metal

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section 2 and inner wooden section 26.

This plastic profile 32 has a central portion 40 from which two ribs extend towards the wooden profile 26 and four wings 42, 44 extend towards the metal profile 2, i.e. in the opposite direction. Each rib 30 has a cross-section that corresponds to the shape of the groove 26.

The outer surface of each rib 30 is completely smooth and inclined according to the inclination corresponding to the surface of the groove 28 and wherein the inner surface is provided with a plurality of longitudinally parallel grooves that facilitate insertion of the rib into the corresponding groove 28 and a firm adhesive connection therebetween.

Each outer wing 42 of the plastic profile 22 extending towards the metal profile 2 has a slight inclination towards another outer wing and has a groove 46 on the outer surface corresponding to the triangular rib 22 of the wings 14, 16. In addition, the inclination of each rib 42 is such that its outer surface forms an inclined plane along which the triangular rib 22 can slide, which will be further clarified to facilitate its snap into the corresponding groove 46. Similar to rib 22, the groove 46 has a larger side wall slightly inclined, taking into account wing 42 and a smaller side wall. perpendicular to the larger Btene.

The height of each outer leaf, as can be seen from the assembly of Fig. 1, is such that the free end abuts with force on the outer surface of the corresponding leaf 18, 20, thereby creating a preload and thereby counteracting possible disengagement of the profiles.

The center position of the profiles 2 and 32 in connection with each other is also ensured by abutting the outer surface of the inner wing 44 of the plastic profile 32 relative to the inner surface of the inner wings 18, 20 of the metal profile 2.

The metal profile 2 of the frame has a 48 groove in which it is inserted

9 & 09 a seal 50 that provides a non-leak seal when the frame is closed between the door and the fixed frame of the frame assembly and defines a longitudinal space 52 between the door and the fixed frame.

As already said, the outer leaf 14 of the metal door profile 2 has a rib 24 facing the double-glass unit 12. The corresponding groove 54 of the plastic profile 56 joins the rib 24, the inserted wooden profile 58 has the function of a glass block if its edge is close to the double glazing 12 with packing 60.

In order to provide effective insulation against noise and wind, the seal 60 has a fin 62 that protrudes with its edge against the wall of the tubular body 4 of the metal profile

Second

The plastic profile 56 embedded in the profile 58 has a plurality of grooves 54 separated from Beba that allow selection of the engagement position of the rib 24 relative to the thickness of the double-glass unit 12 and the distance to be maintained between the profile 58 and the double-glass unit 12.

In order to follow the assembly procedure of the composite profile with respect to the invention, Ba first joins the wooden profile 26b to the plastic profile 32. The connection occurs by inserting the rib 30 of the profile 32 into the corresponding grooves 28 of the profile 26 where it is firmly attached by the adhesive white.

Then the profile 32 is connected to the metal profile 2 when it has previously been connected to the corresponding wooden profile 24. This operation is carried out by mechanical whitening, by pressure or by a suitable roller device, so that the leaf 42 of each profile 32 is connected to sashes 18. 20 and outer sashes 14, 16 with corresponding metal profile 2 ·

To specify, during this force insertion, the triangular rib 22 of each outer leaf 14, 16 of the metal profile slides along the outer surface of the corresponding inclined

92-9 of the leaf 42 of the profile 32 which the rib 22 fits into the groove is flexibly bent until the triangular 46 of the leaf 42 and thereby firmly binds the metal profile 2 ^{with the} plastic profile 3.2. This snap-fit connection can be achieved by interaction between a rib 22 having adequate elasticity and a corresponding groove 46. This makes it possible to use a plastic material that ζπθβΙθ is sufficient to construct the profile 32, thereby becoming sufficiently rigid and capable of providing snap-fit durability. The difference between the end of the wings 42 and the outer surface of the wings 18, 20 of the profile 2 also affects the strength of this connection.

It will be appreciated that the connection between the two profiles 32 and 2 will be simpler if the inner wings 44 and 18, 20 have a smooth shape.

The composite profile thus obtained combines two advantages, namely the high thermal insulation between the outer metal element and the inner wooden element, and the complete non-distortability caused by the possibility of longitudinal sliding of several parts to each other and thus the absorption of unexpected thermal dilatations caused by different types of materials. Sliding between wood and plastic material, which could practically be eliminated by using a plastic material that can withstand a higher load and has a dilatation coefficient close to that of the wood, is made possible by the same elasticity and the surfaces that they touch. The slipping of the used adhesive between the plastic material and the metal is made possible by the same interaction.

To produce a frame assembly, for example a door leaf, the composite profiles are cut relative to the dimensions of the rigid frame and then assembled together using traditional techniques, thereby creating two different frames.

Then, an external seal 10, a double-glass unit 12, and a glazed block 58 already provided with a seal 60 are attached to the door.

they

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Additionally, a frame forming a rigid frame is attached to the wooden molding of the previously built-in wall 38 and the door is fastened to it.

In the composite profile of the present invention, the convergence of the wings 42 of the plastic profile 32 facilitates, on the one hand, maintaining the connection formed by snapping the plastic profile 32 into the metal profile 2 and on the other hand due to the elastic deformation reaction to which the wings are subjected during connection. the frame assemblies while maintaining relative position, thereby ensuring parallelism between the visible metal and wood surfaces.

In this way, prior art errors are eliminated in which the anti-disengagement function is performed by a part which differs from those having a stabilizing function and which can be deformed plastically and not elastically in the coupled state and thus does not ensure parallelism between the visible wood and metal surface.

In the embodiment of FIG. 2, each plastic profile has two tubular extensions 46 formed by two converging Ba wings connected to each other. These extensions cooperate with a central rib 68 located on the metal profile 2 to increase the transverse strength of the two parts and to ensure their centering during assembly.

This strength can be further increased in the embodiment of FIG. 3 and 4, in which the metal profile 2 is also provided with two wings 18 similar to those of the plastic profile 32 in FIG. 1, separated from one another or connected to one another. The composite profile of FIG. 6 used to construct a rigid frame of the frame assembly, bs. differs from the corresponding profile of FIG. 1 in that the seal 50 is not connected to the groove 48 of the metal profile 2 of the frame and does not adhere to the metal profile g, but is connected to the groove 48 formed partially in the plastic profile 32 which forms the door. profile 32 which forms a rigid frame. In this way, the longitudinal space 52 'is formed by a door and a fixed frame

9289 is completely limited by the thermoinsulation of the plastic material and this prevents the growth of condensation of the air inside. This condensation is apparent when the elongate transducer adjoins the metal profile. As a result, the wooden profile 26, which faces the longitudinal space 52 'and all the accessories that are located inside, are protected from the hazardous effects of moisture.

Claims (12)

9289 P A T E N T 0 V E 1. Composite frame prof i1 on assembly Frames formed connection external metal part (2), internal wood part (26) and middle plastic part (32) connecting the outer and inner part (2, 26) and wherein the inner wooden part is firmly connected to the central plastic part (32) and this is again connected to the metal part (2) by wings snapped together and characterized by Ba in that: - the central plastic part (32) has a pair of wings (42) extending towards the metal part (2), which converge with respect to the metal part (2) and which have a longitudinal groove (46) on the outer surface, - the metal part has a pair of outer wings (14, 16) which are directed towards the central plastic part and which are parallel to each other and have at their end a rib (22) complementary to the groove (46) of corresponding and converging wings (42) of plastic and where - the metal part also has at least one longitudinal rib (18), 20), located between the outer wings (14, 16) and acting against the free ends of the plastic wings (46), thereby maintaining them in a preloaded state when connected by snapping the outer wings (14, 16) of the metal part. Profile according to claim 1, characterized in that the wings (42) of the central plastic part (32) of the structure are resiliently pressed against the longitudinal rib of the metal part when the central plastic part (32) is connected to the metal part (2). ). Profile according to claim 1, characterized in that the metal part (2) comprises a pair of inner ribs (18, 20) which cooperate with the converging ribs (42) of the plastic part. 9289 Profile according to claim 3, characterized in that the central plastic part has a pair of wings (44) located inside the converging wings (42) and interacting with the internal ribs (18, 20) of the metal part due to the centering of the plastic and metal parts snap-in during connection. Profile according to claim 1, characterized in that the central plastic part (32) has on the side opposite the wings (42) at least one rib (30) connected to the groove (28) placed on the wooden profile (26). Profile according to claim 5, characterized in that the central plastic part (32) has a pair of ribs (30) interacting with corresponding grooves (28) located in the wooden part (28) having an inner side wall Btena parallel and an outer wall slightly Ba converging towards the bottom of this groove. Profile according to claim 6, characterized in that each rib (30) of the inner plastic part (32) has an outer Btena smooth and an inner wall provided with longitudinal grooves. Profile according to claim 1, characterized in that the outer wing (14) of the metal part (2), which is close to the glass pane, has on the outside a rib (24) with which the groove (54) of the plastic profile (56) corresponds. ) located inside the glass block of the wooden profile (58). Profile according to claim 8, characterized in that the plastic profile (56) has a plurality of parallel grooves (54) connected to the rib (24) of the leaf (14) of the metal part (2) with respect to the thickness of the glass sheet (12). Profile according to claim 8, characterized in that the seal (60) is attached to the glass block (58) 12 9289 interacting with the glass sheet (12) and having a fin (62) extending towards the metal part (2) to which it resiliently abuts. Profile according to one of Claims 1 to 10, characterized in that, to form a rigid frame of the frame assembly, the plastic part (32) has a packing (50) which cooperates when the frame assembly is closed or the central plastic part (32) of the profile. which forms a door of the same frame assembly and limits outwardly a longitudinal space (52, 52 ') which is inwardly restricted by a wooden part of the same profile and is thermally insulated by the metal part (2). A profile according to any one of claims 1 to 10, characterized in that, to form a rigid frame of the frame assembly, the central plastic part (32) has a packing (50) which cooperates when the frame assembly is closed with a seal disposed in the central part (32). 1) of a profile which forms the door of the frame assembly and limits outwardly a longitudinal space (52, 52 ') which is limited inwardly by the wooden part (26) and is thermally insulated by the metal part (2).