EP2526247B1 - Composite edge clamp for an insulating glass unit, composite edge of an insulating glass unit, insulating glass unit comprising a composite edge clamp - Google Patents

Description

The present invention relates to a marginal composite clip for an insulating glass unit, an edge assembly of an insulating glass unit, and a peripheral edge clad insulating glass unit.

In the prior art, an edge bond in insulating glass units with two or more panes (multi-pane insulating glass = MIG) is usually produced by the use of Spacem (spacers) between the discs of the MIG unit and a back cover such as butyl. Such an insulating glass unit with edge bond, as exemplified in Fig. 4 is then inserted into a frame or other fixture for use as a window, door or façade element. In Fig. 4 is a MIG unit according to the prior art with three writing 2, 2 spacers arranged therebetween 8 and on the sides of the spacers 8 facing away from the spacers 8 arranged secondary sealant 9 shown.

Examples of such insulating glass units with edge seal are in the US 2008 / 0110109A1 ( DE 10 2004 062 060 B3 ), of the DE 20 2005 016 444 U1 , of the US 5,460,862 ( DE 43 41 905 A1 ), of the US 4,149,348 , of the US 3,758,996 , of the US 2,974,377 , of the US 2,235,680 , of the US 2,741,809 or the US 2,838,809 , as examples, shown.

An edge bond without separate spacer is eg in the US 4,015,394 showing a MIG unit with two sheets of air or nitrogen filling between the panes and a plastic edge seal bracket with a pedestal between the panes on which a metal layer impermeable to volatile gases or elements emerging from the plastic of the edge seal bracket, of the US 2,525,717 or the US 2,934,801 shown. Spacers are eg from the US 6,339,909 ( DE 198 05 265 A1 ) or the WO 2006/027146 A1 known.

In the US 3,872,198 , of the GB 1 520 257 or the WO 00/05474 A1 For example, frames are shown in which the discs of an insulating window are used without prior production of a marginal composite.

The EP 0 029 984 A1 discloses a framed multi-pane insulating glass with discs inserted in grooves of the frame. The frame consists of two plastic profile bar parts, which are held together by a snap or snap connection. One of the two plastic profile rod parts acts as a spacer (Spacer), and between the two plastic profile rod parts an aluminum foil is clamped as a vapor diffusion barrier layer in the releasable snap or snap connection.

The US 2003/0037493 A1 discloses window frames (Sash) for multi-pane insulating glass window units. The window frames can be made of plastic. In one embodiment, such a window frame is integrally formed with grooves for inserting the discs such that the portion between the grooves acts as a spacer. On this section, a 0.0254 to 0.127 mm thick anti-Ausgasungsschicht is formed, which extends continuously from an inner wall of a groove to an inner wall of the other groove, which are each formed by this section.

The FR 1 475 287 discloses profile parts made of plastic for multi-pane insulating glass units, which have grooves for inserting the discs. On the profile part, a metal layer is formed, which is glued or clamped or clamped, for example, and which is formed in all embodiments in cross section at least on the side facing away from the discs / grooves, and in most embodiments, the profile parts in cross section completely or completely encloses to the grooves, and which is arranged in all embodiments on the outer surface of the profile parts.

The DE 196 44 346 A1 discloses a plastic sealing profile for glazing of insulating glass panes, which has an integrally extending from a bridge or profile back spacer having on its projecting into the space between the panes a sealing film.

In the case of insulating glass units with edge bonding, the mechanical strength is usually produced via the secondary seal, which usually consists of polysulfide, polyurethane, silicone or similar materials. In many common edge assemblies, the MIG units must be placed on pads when inserted into the frames to protect the footprint of the glasses against chipping.

It is an object of the present invention to provide an edge joint clip, an edge seal for an insulating glass unit, a peripheral edge insulating unit, and a spacer for an insulating glass unit, which allow improved heat insulating properties with comparatively simple manufacture.

This object is achieved by an edge joint clip for an insulating glass unit according to claim 1 or an edge seal for an insulating glass unit according to claim 6 or an insulating glass unit with edge joint clip according to claim 7.

Further developments of the invention are specified in the dependent claims.

It is possible to reduce the heat loss through the pane edge of an insulating glass unit. In particular, compared to the use of a secondary seal, the heat losses are significantly reduced.

The edge joint clip allows a comparatively small dimensioning of the profile, which in turn allows to bring a corresponding MIG unit without secondary seal in a, compared to the prior art, deeper, thermally favorable position (the discs) in the frame.

The comparatively small dimensioning of the profile of the edge composite clamp allows a smaller and thus thermally more favorable cross-sectional area in the heat conduction direction of the frame or the frame when maintaining a conventional insertion depth.

The edge clip allows the use of blocks to be eliminated.

The use of the edge composite clamp with integrated gas diffusion barrier makes it possible to minimize the layer thickness of the gas diffusion barrier.

Further features and expediencies will become apparent from the description of embodiments with reference to FIGS.

Fig. 1

eine Querschnittsansicht durch einen Randverbund einer Dreifachisolierglas-Einheit, in der mehrere Ausführungsformen ohne Spacer gezeigt sind;

Fig. 2

eine Querschnittsansicht durch einen Randverbund einer Dreifachisolierglas-Einheit, in der mehrere Ausführungsformen ohne Spacer gezeigt sind;

Fig. 3

eine Querschnittsansicht durch einen Randverbund einer Dreifachisolierglas-Einheit, in der eine weitere Ausführungsform ohne Spacer gezeigt ist; und

Fig. 4

eine herkömmliche MIG-Einheit im Querschnitt.

From the figures show:

Fig. 1

a cross-sectional view through an edge bond of a triple insulating glass unit, in which several embodiments are shown without a spacer;

Fig. 2

a cross-sectional view through an edge bond of a triple insulating glass unit, in which several embodiments are shown without a spacer;

Fig. 3

a cross-sectional view through an edge bond of a triple insulating glass unit, in which a further embodiment is shown without a spacer; and

Fig. 4

a conventional MIG unit in cross section.

Fig. 1 shows a first embodiment of an edge joint clip 3 in the edge joint of a multi-pane insulating glass unit (MIG unit) 1. In the first embodiment, designated by the reference numerals 12, 13, 14 layers are not present, with reference to the Fig. 1 be described in further embodiments. In the first embodiment described first, only the layer denoted by reference numeral 11, which will be described later, is provided. This is sent ahead for a better understanding of the description. The first embodiment does not fall under the claims.

The edge-band clip 3 has an edge composite clip body 30 made of a heat-insulating material having a specific thermal conductivity ≦ 0.3 W / (mK) such as a corresponding polyolefin, preferably polypropylene (PP), or polyvinyl chloride (PVC) or a polycarbohyd-ABS blend, the thermal conductivity in the range of 0.2 W / (mK), on. As will be described later, these materials are preferably coated with suitable fillers, e.g. Fiberglass provided.

In Fig. 1 and all subsequent drawings, the horizontal direction x, the vertical direction y and the direction protruding from the paper plane z are called. The corresponding directions are in Fig. 1 shown with a coordinate system. The clamp body 30 extends in a longitudinal direction z having a constant cross-section in each plane (xy) perpendicular to its longitudinal direction z, as in FIG Fig. 1 is shown. The clamp body 30 has a U-shape in cross section. The U-shape is formed by two parallel side walls 3a, 3b which form the legs of the U-shape and a base wall 3e which is perpendicular to the side walls 3a, 3b in the transverse direction and connects the two side walls 3a, 3b. The U-shape has a height h1 in the height direction y, wherein the side walls have a height h2.

At the in Fig. 1 In the first embodiment shown, two pedestals 3c, 3d are provided between the legs of the U-shape which project vertically in the vertical direction y from the base wall 3e in the same direction as the side walls 3a, 3b and spaced from each other and spaced from the side walls 3a , 3b in the longitudinal direction z, as the side walls 3a, 3b, extend. This is also evident from the statement that the edge composite clip 3 has a constant cross section in the longitudinal direction z, as in FIG Fig. 1 is shown

For the in Fig. 1 In the embodiment shown, the layers 12, 14 must be thought of as absent in the sockets 3c, 3d. Incidentally, both pedestals 3c, 3d have a cross-sectional shape as shown for the left pedestal 3c in FIG Fig. 1 is shown.

By the corresponding configuration of the side walls 3a, 3b and the pedestals 3c, 3d, together with the base wall 3e, three upwardly open troughs 3w are defined, the first trough 3w between the first side wall 3a and the first pedestal 3c, the second trough 3w between the first pedestal 3c and the second pedestal 3d, and the third tub 3w between the second base 3d and the second side wall 3b is defined, each with the base wall 3e as a floor. The first tray 3w is bounded in the transverse direction x by an outer wall 3wa of the first side wall 3a, the upper tray 3we of the bottom 3e and a side wall 3wb of the first base 3c. Similarly, the second and third wells 3w are bounded by the upper well 3we of the bottom 3e and respective side walls 3wc, 3wd and 3wb of the first pedestal 3c, the second pedestal 3d and the second sidewall 3b. At the top in the vertical direction y ends of these side walls are in the in Fig. 1 shown first embodiment, projections 3v formed. The height hv in the height direction y of these projections is preferably in the range of 1/5 to 1/12 of the height h2, preferably 1/8 to 1/10 of h2. The projections 3v are optional. Alternatively, the side walls of the trays 3w may also extend in the height direction exclusively perpendicular to the transverse direction x or in the vertical direction y such that the tray 3w is tapered in the height direction y towards the opening. Preferably, the projections 3v are also tapered.

In the first embodiment, which does not fall under the claims, a gas diffusion barrier 11 is provided, which is formed as a gas-diffusion-proof metal foil or metal layer or film or layer of a gas-diffusion-tight plastic. Gas diffusion proof means that it is formed with a thickness that results in the formation of a gas diffusion barrier which is gas-tight in the sense of DIN EN 1279 Part 3 (≤ 1% gas loss / year for argon). For a metal foil or a metal layer, such a gas diffusion tightness is reliably achieved for a layer thickness ≤ 0.2 mm. Preferably, the layer thickness when using metal, e.g. Stainless steel, galvanized steel or the like ≤ 0.1 mm, preferably ≤ 0.05 mm, more preferably ≤ 0.01 mm. An exact lower limit can not be specified in isolation, but it is clearly determined by the previously defined gas tightness for those skilled in the art. A lower limit of 1 μm or 2 μm is not unrealistic. A suitable plastic would be EVOH, e.g. Soarnol®, manufacturer Nippon Gohsei.

The gas diffusion barrier 11, in the presence of the protrusions 3v, extends from the inside outside 3wa of the first side wall 3a, that is, the wall 3w in the transverse direction x outside bounding wall, via the protrusion 3v on the first side wall 3a over the entire outside of the clamp body 30, ie via the first side wall 3a, the base wall 3e and the second side wall 3b up to the inside outside 3wb the second side wall 3b which defines / defines the third tray 3b on the outside in the transverse direction x. Of course, the diffusion barrier 11 may also extend further down along the outer sides 3wa, 3wb in the vertical direction y, but that is not absolutely necessary in terms of the function.

How out Fig. 1 3, three trays 3w are defined by this shape of the edge clamp 3, into which glass panes 2 of an insulating glass unit can be inserted, which can then be glued and sealed in the trays 3w by means of a gas-diffusion-tight adhesive 4 such as butyl.

The width in the transverse direction x of the trays 3w is dimensioned such that they are at the opening side, where in Fig. 1 the protrusions 3v are opposite, the thickness of the discs 2 in the transverse direction x corresponds. This is desirable for aesthetic reasons, since when using the insulating glass unit on the disc spaces 7, these points are visible. It is also desirable from a technical point of view, so that no glue 4 emerges. So that the trays 3w do not have to be completely filled with adhesive 4, it is advantageous if the diffusion barrier 11 further along the walls 3wa, 3wb, for example by 1/6 to 1/10 of the height h2, preferably 1/8, on as the projections 3v is pulled down.

In the assembled state of the insulating glass unit, as in Fig. 1 is shown, causes the diffusion barrier 11 in cooperation with the gas-diffusion-tight adhesive 4, which may be butyl, for example, that a gas diffusion-proof mounting of the discs 2 is achieved without secondary sealant (see Fig. 3 ) must be used. The mechanical strength of the assembly is provided over the bracket body 30, in addition to providing edge protection, etc.

The layer thickness of the diffusion barrier 11 has already been described. It will be below, as in Fig. 1 shown with h5 with respect to the height of the edge joint clip 3 and d1 with respect to a layer thickness. The base wall 3e of the edge composite clip 3 has a height h3, which is formed by the height h4 of the bracket body 30 in the area of the base wall 3e and the layer thickness h5 = d1 of the diffusion barrier 11. The height h4 is preferably in the range 1 to 5 mm, preferably 1 to 3 mm, preferably about 2 mm, so the height h3 is substantially equal to the height h4, since the amount of h5 is negligible in comparison, in particular in the preferred embodiments with h5 ≤ 0.01 mm.

The height h2 is preferably in the range 4 to 15 mm, preferably 5 to 10 mm, more preferably 5 to 8 mm. Therefore, the height h1 is preferably not larger than 25 mm, more preferably not larger than 20 mm, still more preferably not larger than 15 mm, preferably in the range of 7 to 10 mm.

The widths of the pedestals 3c, 3d may differ, and depending on the thickness of the respective glass panes 2a, 2b, 2c to be used in the transverse direction x, the respective spacings of the pedestals from the side walls may differ according to the thickness of the pane be (or the same).

Now, a second embodiment, which does not fall under the claims, with reference to Fig. 1 described. In this case, the layers 11, 13, 14 are disregarded, and only the layer 12 on the first and second pedestals 3c, 3d is present. This layer 12 is in turn a diffusion barrier such as the diffusion barrier 11, and for the layer thickness d1 and the materials and the extent in the height direction y, what has been said for the diffusion barrier 11 applies. That is, the diffusion barrier 12 extends on top of the pedestals 3c and on both sides beyond the projections 3v (if present) except for the sidewalls 3wc and 3wd, respectively, depending on the intended degree of filling of the tubs 3w with adhesive 4, to a corresponding one Depth. In the presence of the protrusions 3v, which measure in the range of 1/5 to 1/12 of h2 in the height direction y, about the same in the depth. If the protrusions 3v are absent, to a corresponding depth (2/5 to 1/6 of h2), depending on the intended filling of the tub 3w with adhesive 4.

In Fig. 1 For example, on the first pedestal 3c, there is shown an adhesive bead consisting of a known molecular sieve 5 (5a). The molecular sieve 5 may also be referred to as a desiccant. In the second base 3d, a recess 3u is shown, which is filled with a molecular sieve / desiccant 5 (5b). The recess 3u is closed with a cover 6 having perforations 6h (in a known manner) so that the desiccant can communicate with the space between the panes 7. At the in Fig. 1 shown embodiment of the base 3d, the diffusion barrier 12 is designed such that it lines the recess, ie, completely covers all inner walls of the recess 3u (not the cover 6). The first and second pedestals 3c, 3d may also be both equally formed in both manners. The corresponding application of the molecular sieve 5a as a bead or the molecular sieve 5b in a recess 3u, if necessary. Chamber with cover and perforations, can of course also be provided in the first embodiment. However, then the diffusion barrier 12 is missing, since there the diffusion barrier 11 is present. Alternatively, the recess 3u may be used to insert a container for a molecular sieve / desiccant 5. That is, instead of introducing the molecular sieve / drying agent 5 directly into the recess / recess 3u, it is designed to receive and fix a container, eg, by clipping or snapping or gluing or the like in which a molecular sieve / desiccant 5 is contained , The container is in turn then not formed diffusion-tight to the space between the panes 7, for example, by being open at the top or having perforations or is designed with a gas-permeable upper side.

Now, a third inventive embodiment will be described with reference to FIG Fig. 1 described. Only the layer 13 is present. The layers 11, 12, 14 are not present. In the third embodiment, the diffusion barrier 13 is again a layer of the materials and with the respective thicknesses, as described for the diffusion barrier 11 in the first embodiment. In this case, the diffusion barrier 13 extends from the inside outside 3wa of the first side wall 3a, which bounds the first pan 3w outward, continuously to the inside outside 3wb of the second wall 3b, which bounds the third pan 3w outwardly in the transverse direction It is essential that the diffusion barrier 13 comes into contact with the adhesive 4. It could also extend through the clamp body 30 from the base wall 3e which bounds the first and third wells 3w, respectively. It is not important whether it extends through the insulating body or along the bottoms of the first to third pan 3w.

Now, a fourth inventive embodiment will be described with reference to FIG Fig. 1 described. In the fourth embodiment, the layers 11, 12, 13 are absent, but only the two diffusion barriers 14, which are again formed as layers having the thickness d1 and the corresponding materials already described in the first embodiment.

The diffusion barriers 14 extend in the transverse direction x transversely through the pedestals 3c, 3d respectively up to the wells 3w located on the two outer sides of the pedestals.

Fig. 2 shows a modification of the fourth inventive embodiment. In the modification of the fourth embodiment, the layers 11, 12, 14 are absent, but only the two diffusion barriers 14 ', which are again formed as layers having the thickness d1 and the corresponding materials already described in the first embodiment. The diffusion barriers 14 'extend continuously (like the diffusion barriers 14) from the inner walls of two adjacent trays 3w, but in this case not from the inner side walls 3wc, 3wd but from the bottom walls 3we of the trays 3e through the staple body 30 It is preferred to be transversely x below the level of the bottom walls 3we, but as in all other embodiments, to have continuous, uninterrupted communication with the interior walls of the trays. In the modification shown, this is achieved by the U-shape of the layer which is flat in cross-section (xy).

All other details of the first embodiment apply equally to the second to fourth embodiments.

When using the second, third and fourth embodiments in an insulating glass unit, as in Fig. 1 . 2 is shown, in turn, as in the first embodiment, effective diffusion barriers for the interpane spaces 7 result by cooperation of the respective diffusion barriers 12, 13, 14 and 14 'with the adhesives 4 in the trays 3w, as shown in FIG Fig. 1 . 2 obviously.

The first to fourth embodiments have in common is that a U-shaped profile is used as a bordering clip 3, which corresponds to one of the number of slices of MIG unit 1 number (minus 1) of sockets 3c, 3d (ie, for example, three sockets at four Washers) for forming trays 3w is formed for receiving the discs. Obviously, both the use of spacers 8 and the use of secondary sealant 9, as shown in FIG. 11, can be dispensed with.

The heat insulating properties are thereby improved in many ways. The abandonment of the secondary sealant with a generally worse by a factor of 2 or more specific thermal conductivity as the plastic of the clamp body 30, along with the possible dimensioning of the base wall, results in a significant reduction in heat conduction without sacrificing gas tightness and / or strength, while gaining edge protection and handleability.

Another advantage in the improvement of the thermal insulation properties is made possible by the low design of the composite edge, which allows, with the same frame configuration, increased insertion depth into the frame.

In Fig. 3 is a fifth embodiment, which does not fall under the claims, shown an edge-band clip 3 for use without a spacer. In Fig. 3 like reference characters designate the same elements as in FIG Fig. 1 . 2 and its description is therefore omitted.

Unlike the first to fourth embodiments Fig. 1 and 2 The edge joint clip 3 does not have a continuous base wall 3e, but each of the trays 3w is provided with a separate section 3e 'of the base wall as the bottom. As a result, it is possible to form recesses 3ca or a cavity 3dh enclosed by a wall 3e "in the pedestals 3c and 3d, respectively Fig. 3 On the base 3d a further modification of the application of a molecular sieve / drying agent 5 (5c) is shown, which is glued in the form of a correspondingly formed adhesive tape. The formation of recesses 3ca and / or hollow chambers 3dh with base wall portions 3e "having a reduced height provides a further improvement in heat insulating properties.

Of course, the in Fig. 3 shown fifth embodiment also according to the first, second and fourth embodiment Fig. 1 and 2 modified with respect to the diffusion barrier layer. That is, a diffusion barrier layer could pass over the outside in accordance with the diffusion barrier 11, and the diffusion barrier could also extend in the clip body corresponding to the diffusion barriers 13, 14, 14 ', respectively.

It is still, if it also in the Fig. 1 to 3 is not shown, preferably that at the edge composite clip 3 if necessary functional elements (see also Fig. 5) as recesses for fittings or fasteners such as protrusions for curling or the like are formed.

The marginal composite clip 3 is made by coextruding clip body 30 and diffusion barrier layer 11, 12, 13, 14, 14 '.

In all embodiments, the thermal expansion coefficient of the edge composite clip 3 is preferably adapted to the thermal expansion coefficient of the disks 2. Glass, for example, has a coefficient of thermal expansion of about 7.6 × 10 ^-6 1 / K, while, for example, polypropylene has a factor of 10 or more higher thermal expansion coefficients at room temperature. Preferably, the material from which the staple base 30 is formed, but should have a coefficient of thermal expansion in the region of the glass. This can be achieved, for example, by adding glass fibers in an appropriate amount as filler to the plastic, such as polypropylene. Another possibility is to extrude a stainless steel sheet whose extension is parallel to the disc 2 (zy-plane), in the side walls 3a, 3b or applied to the outside of the side walls 3a, b. Instead of a stainless steel sheet or other metal sheet, a glass fiber mat could also be extruded or applied externally. All these measures change the thermal expansion and adapt it to that of the glass pane.

Claims (7)

1. Edge bond bracket extending in a longitudinal direction (z) with a cross-section which is constant in the cross-section (x-y) perpendicular to the longitudinal direction, the edge bond bracket being suitable for an insulating glass unit and comprising
   a substantially U-shaped bracket body (30) made of a first material with a specific thermal conductivity ≤ 0.3 W/(mK) and having at least one base (3c, 3d), wherein at least two troughs (3w) for accommodation of an adhesive (4) and panes (2a, 2b, 2c) of an insulating glass unit are defined by the at least one base (3c, 3d) and a first side wall (3a) and a second side wall (3b) forming the legs of the U-shape, and
   a gas diffusion-tight diffusion barrier layer (13, 14, 14') having a layer thickness ≤ 0.1 mm and formed integrally with the bracket body (30) by coextrusion and on or in the bracket body (30),
   wherein the diffusion barrier layer (13, 14, 14') extends continuously between two troughs (3w), starting from the inner wall (3e, 3we, 3wa, 3wb, 3wc, 3wd) of one of both troughs (3w) and ending at the inner wall (3e, 3we, 3wa, 3wb, 3wc, 3wd) of the other one of both troughs (3w), through the bracket body (30),
   such that the diffusion barrier layer (14, 14'), starting from the inner walls (3e, 3we, 3wa, 3wb, 3wc, 3wd) of two adjacent troughs (3w), extends continuously through the bracket body (30), or that the diffusion barrier layer (13), starting from the inner sides of both legs facing each other, extends continuously through the bracket body (30).
2. Edge bond bracket according to claim 1, wherein
   the troughs (3w) defined by the first and second side walls (3a, 3b) and the at least one base (3c, 3d) extend tapering in the height direction and/or are formed narrowing by projections (3v) provided at the upper edges in the height direction of the first and second side walls (3a, 3b) and the at least one base (3c, 3d).
3. Edge bond bracket according to claim 1 or 2, wherein
   the diffusion barrier layer (14'), starting from the bottom walls (3we, 3e) of two adjacent troughs (3w), extends continuously through the bracket body (30).
4. Edge bond bracket according to claim 1 or 2, wherein
   the diffusion barrier layer (14), starting from the opposite outer sides (3cw, 3dw) of the base (3c, 3d), extends continuously through the base (3c, 3d).
5. Edge bond bracket according to any one of claims 1 to 4, wherein
   functional elements (3f) are provided on the outer side of the U-shape, and/or wherein recesses (3ca) and/or cavities (3dh) are provided on the outer side of the U-shape and/or in the bracket body (30).
6. Edge bond of an insulating glass unit comprising an edge bond bracket according to any one of claims 1 to 5, wherein
   a gas diffusion-tight adhesive (4) is formed adjacent to and continuous with the gas diffusion-tight diffusion barrier layer (13, 14, 14') for forming a gas diffusion barrier.
7. Insulating glass unit comprising
   two or more panes (2, 2a, 2b, 2c) disposed parallel to each other while forming one or more pane interspaces (7) therebetween, and
   an edge bond according to claim 6, the edge bond being disposed such that the diffusion barrier seals the one or more pane interspaces (7) in a gas diffusion-tight manner.

Images