EP1554455B1 - Spacer for panes of multilayer insulation glazings - Google Patents

Abstract

The invention relates to a spacer for panes (20) of multilayer insulation glazings, particularly for use in windows, doors, or similar. Said spacer consists of a hollow profile that is filled with a moisture-absorbing material. In order to obtain a good seal with a low quantity of sealant in the peripheral bond, the spacer is provided with webs (3) which protrude from the rear wall (5) of the hollow profile. Such a web (3) delimits a space (24) for receiving a sealant along with a disk that is adjacent to said web (3). No sealant needs to be applied to the outer surface (17) of the rear wall (5).

Description

The invention relates to a spacer for discs of Mehrfachisoliergläsern, in particular for use in windows, doors od. Like., Which consists of a hollow profile that is filled with a moisture-absorbing material. Such spacers can be connected by bending and / or via a plug connection to a spacer frame, which is arranged between the panes of a Mehrfachisolierverglasung and then sealed by means of edge seal. In the case of edge sealing, one or two-stage systems are known. In single-stage systems, hotmelt or butyl in a sealant width of at least 7 mm is preferably applied as an edge seal. In two-stage systems, a distinction is made between the primary sealant, preferably butyl, which is preferably arranged in the region of the side walls of the hollow profile between the spacer and the glass panes, and secondly the secondary sealant, for example silicone, polyurethane or polysulfide. This secondary sealant is applied in density widths of at least 4 mm, whereby a minimum coverage of the spacer back of 2 mm is desired. The butyl ensures the water vapor and gas tightness. The secondary sealant ensures the stability of the edge seal.

Many efforts have been made to develop spacer profiles that realize a particularly dense edge bond. In the EP 0 586 121 describes an insulating unit in which a better edge seal is achieved by using more sealing material. Here, the spacer profiles are changed in particular so that in the side wall of the Spacer an arcuate recess is provided, which leads to the fact that with more constant sealant width more primary sealant can be accommodated in the edge bond, in particular the distance of the spacer side wall to the pane - at least partially - increased. Since the cost of sealant significantly affect the overall price of the insulation system, such a solution, which uses significantly more sealant, is expensive and undesirable.

In the German Offenlegungsschrift DE 100 23 541 A1 a spacer profile is described in which the seal is improved by increasing the sealant width for the primary sealant. This is achieved by a spacer profile which has side walls with legs extended beyond the visible surface. These legs have at their respective ends a thickening, which rest against the discs and thus limits a larger sealant space. The improvement of the seal is achieved here, however, with equal or slightly higher amount of sealant. For a cost-effective insulating glazing, however, a reduction in the amount of sealant would be of interest.

From the documents BE 1000298 . US 4,811,532 and DE 22 24 264 is also known an increase in the width of the sealant. Two webs projecting beyond the rear wall of the spacer hollow profile are provided, wherein webs are shown in the first two documents which are aligned parallel to the disks. These webs are very generously dimensioned in length, so that a lot of sealant can be provided in a receiving space between the respective web and the disc. This leads to no saving of sealant. In the German Offenlegungsschrift DE 22 24 264 a spacer profile is shown with inclined from the rear wall of the spacer profile webs. These webs are inclined in the direction of the discs, so that the gap between the webs results in a conical groove for the positive reception of a fastening element. Sealant can be provided between the discs and the respective webs. To optimize the amount of sealant, this document contains no information. About that In addition, the inclined in the direction of disks webs for flexible spacers are unsuitable.

The object of the present invention is thus to achieve an equally good or better sealing a Mehrfachisolierglassystems with a smaller amount of sealant.

The solution of this seemingly contradictory task is achieved by a spacer with the features of claim 1. The rear wall of the hollow profile projecting webs thereby limit a receiving space for the sealant, i. in single-stage systems, for example, for the hotmelt and in two-stage systems for the secondary sealant. No sealant is provided in the area between the two webs, i. The rear wall of the hollow section is not covered with sealant. For a sufficiently large receiving space, the other part of the rear wall, which is located outside the webs, formed as a deeper level.

As a hollow profile, open or closed hollow profiles can be used, i. the outgoing from the rear wall of the hollow profile webs can also be provided in hollow sections without inner wall or with a larger opening in the region of the inner wall.

A sealant application on the outer surface of the rear wall of the hollow profile is also not necessary, since when using metal spacers, the metal material ensures better gas and moisture tightness than the aforementioned, known for the edge sealants. The required by the quality community minimum sealant width of 7 mm for a one or two-stage system can be maintained even when using the spacer according to the invention.

A space for the primary sealant may, in one embodiment of the spacer according to the invention, in which the walls give a nearly box-shaped cross-section, through the respective, the glass pane be limited opposite side wall. Also in this embodiment, the required minimum sealant width can be achieved. The side walls are approximately parallel to the discs and approach the disc in the direction of the inner wall in their lower corners. These corners represent a boundary of the primary sealant gap to the disk interior. This primary sealant space is greatly tapered at this point, so that penetration of primary sealant into the space between the panes is made more difficult. The distance between the lower corners of the side wall and the inner wall corresponds to the spacer width. Advantageously, the friction during transport and in the guidance of the spacer profiles in bending devices or other processing machines is reduced by this profile shape, since the profile no longer has to be detected on the entire side wall to move, but only at the outermost points, the corners, which are formed by the inner wall and the side wall, namely the so-called boundary points.

The primary sealant width may further be formed or increased by legs which extend the side walls of the hollow profile and protrude beyond the inner wall facing the disc interior and provided with perforations.

A receiving space for the secondary sealant is bounded on the one hand by the disc and on the other hand by a projecting from the rear wall web laterally. Down the delimitation of the receiving space takes place in providing a deeper level of the rear wall through this located outside the webs level of the rear wall. The size of the receiving space for the secondary sealant changes due to the length and positioning of the webs according to the invention. These bars should be at least 1.5 mm long. For bendable spacers preferably webs with a length of 1.5 to 3 mm are conceivable. In a preferred embodiment, in addition, the rear wall outside the webs is formed as a step, so that increases the receiving space for the secondary sealant. For spacer profiles that do not need to be bent, but are joined together by corner connectors to a spacer frame, The length of the bars can be extended to a maximum of 5 mm. The minimum length of 1.5 mm results from the fact that a sufficient surface for the adhesion of the secondary sealant must be made available.

By providing a shadow groove on the front of the spacer further advantageously a low-contact stacking of the spacer profiles is possible. The usual full-surface contact between the visible surfaces and profile back in a stacking conventional spacers is avoided. In the spacers according to the invention, only the ends of the two webs touch the visible surface, so that in case of contact or friction corrosion only two lines on the visible surface can arise, which are also arranged in each case in a shadow groove.

The webs may project at right angles from the rear wall, but may also be inclined, the inclination of the webs preferably being provided so as to extend away from the disks, i.e. from the rear wall of the spacer. are inclined towards each other. This inclination of the webs allows a good flexibility of the spacer to a spacer frame, preferably also at the corners. There is no tearing of the spacer profile at the corners, since the webs create in this area on the rear wall. The better bendability of the spacer according to the invention is further evident from the fact that in the inventive spacer profile over spacers of the same height the rear wall moves closer to the neutral chamfer and thus the elongation of the rear wall is reduced during bending. The spacer according to the invention can be filled and unfolded bend, wherein at the same height of the interior of the spacer profiles for the desiccant is smaller, i. In addition, desiccant can be saved.

In a further preferred embodiment, the walls of the spacer are concave, ie curved in the direction of the interior. This leads to a better tightness of the insulating glass, since the spacers the possible, caused by wind and climatic influences movements of the Can compensate for glass. Furthermore, this spacer shape supports the better bendability of the profile, since the rear wall and inner wall are aligned towards the neutral chamfer and are thus less stressed during bending. Concave sidewalls also increase the primary sealant space, so that in this case a larger butyl reservoir can be provided.

Fig. 1

einen Querschnitt durch einen weiteren erfindungsgemäßen Abstandhalter in seiner Anordnung zwischen zwei Scheiben und

Fig. 2

einen Querschnitt durch zwei übereinandergestapelte erfindungsgemäße Abstandhalter gemäß Fig. 1.

The invention will be explained below with reference to an embodiment with reference to the figures. However, the invention is not limited to this embodiment. It shows:

Fig. 1

a cross section through another spacer according to the invention in its arrangement between two panes and

Fig. 2

a cross section through two stacked spacers according to the invention according to Fig. 1 ,

An inventive spacer for Mehrfachisolierverglasungen consists of a hollow profile 1, which contains a moisture-absorbing material in its interior 4, which is not shown in the figures. This interior 4 is bounded by two side walls 10, the rear wall 5 and the inner wall 6. The inner wall 6 has a wall weakening. In this area of the wall weakening perforations 14 are arranged, which allows a connection of the disc interior 21 with the interior 4 of the hollow profile 1 for the purpose of moisture absorption. The hollow profile 1 according to the invention with two rear wall 5 of the hollow section 1 superior webs 3 is provided. These webs 3 are inclined away from the disks 20, and have a length L1. In principle, the webs 3 can be arranged at any desired location of the rear wall 5. In an advantageous manner, however, these are provided in the hollow profile 1 in the region of the rear wall 5, where the rear wall 5 merges into the step 28. The step 28 forms with the side wall 10 a corner 27th

In Fig. 1 and Fig. 2 a box-shaped hollow profile 1 is shown. The interior 4 is limited in this spacer hollow profile 1 by an approximately parallel rear wall 5 and inner wall 6 and by approximately parallel side walls 10. The webs 3 are spaced from the glass sheets 20 to obtain a sufficiently large receiving space 24 for the secondary sealant. Furthermore, the outgoing from the rear wall 5 webs 3 are arranged obliquely and inclined towards each other. This is particularly advantageous when bending spacer frame corners. Vertical bars would have to be deformed during bending over the high edge, which is problematic and leads to tearing of the webs or even the profile in this corner area. As a result of the inclination of the webs 3, they bend against the outer side 17 of the rear wall 5 during corner bending without damaging the hollow profile 1.

In the rectangular hollow profile 1 according to Fig. 1 the gap 23 for the primary sealant is laterally limited by the side wall 10 and the disc 20, preferably, the gap 23 tapers downwards. The side wall 10 has a lower corner 25 with the inner wall 6. This corner 25 is formed so that it represents a lower boundary point 26 for the gap 23. There is no direct contact of the corner 25 with the glass pane 20, nevertheless, the primary sealant is held substantially in the intermediate space 23. In contrast, the upper corner 27 of the respective side wall 10 is in the example Fig. 3 spaced from the disc 20 so that the gap 23 for the primary sealant and the receiving space 24 for the secondary sealant merge into one another. This can be particularly advantageous in insulating glass systems that are exposed to large lateral forces. As a result of the corner 27 set back relative to the lower corner 25, the glass pane 20 has the possibility of pivoting at a greater angle under pressure loads, without the sealant being torn off the pane 20 and leading to a leak in the system.

For multiple insulation glazing, a minimum sealant width of 7 mm is required for one or two-stage systems. The spaces 23 shown in the examples for the primary sealant and receiving spaces 24 for the Secondary sealants can also be used for a single-stage packing system.

The required width B1 of the primary sealant surface results as the longest extent of the gap 23. In Fig. 1 also the sealant widths B1 and B2 are shown. The width B1 is at least 3 mm. The width B2 of the secondary sealant surface extends to the end face 18 of the web 3 or the end face 22 of the glass pane 20. However, the end face 18 of the webs 3 does not have to end at the same height as the end face 22 of the glass panes 20. The secondary sealant is provided in two receiving spaces 24 each between a web 3 and the adjacent disk 20. Down the receiving space 24 is limited by the transition to the gap 23. In the example of Fig. 1 the receiving space 24 is limited downwards substantially through the outer regions of the rear wall 5. For a sufficiently large receiving space 24, the rear wall 5 is formed as a step 28, which is arranged lower than the rear wall 5.

The outer surface 17 of the rear wall 5 is not continuously coated with sealant, ie it saves secondary sealant. An impairment, in particular the tightness of Mehrfachisolierglassystems is not recorded. For spacer profiles that are bent into a spacer frame, the back panel at the corners may be coated with secondary plastic sealant to ensure tightness. In any case, this means a significant saving on the expensive secondary sealant, for example on polysulfide. The amount of secondary sealant depends on the size of the receiving space 24. This can be influenced on the one hand by the distance A of the web 3 of the disc 20 and the other by the length L1 of the web 3. The length L1 of the web 3 should ensure a good adhesion of the secondary sealant, at least 1.5 mm. For bendable spacers, the webs 3 are limited to a maximum of 3 mm and for other spacers to a maximum of 5 mm.

For webs 3, which would touch the visible surface 7, takes place as shown Fig. 2 can be seen, a stacking of the hollow sections 1, 1 'such that the ends of the webs 3 engage in shadow grooves 15. It is the friction and contact corrosion on the visible surface 7 is prevented or if it comes to such a friction or contact corrosion, this is not visible on the visible surface 7 as a decorative defect, since it disappears in the shadow groove 15 and remains limited to this ,

The hollow profile 1 according to the invention is advantageously characterized by a comparatively small interior space 4. Compared with known spacer profiles, the hollow profile 1 according to the invention has a smaller maximum height Hmax. This results from the comparison with known spacers staggered arrangement of the rear wall 5 in the direction of the interior of the fourth

The aforementioned indentation 16 of the inner wall 6 further leads to an additional reduction of the interior 4 for the moisture-absorbing material. Like in the Fig. 1 1, the maximum height Hmax of the inner space 4 in the region of the perforation 14 decreases to a minimum height Hmin of the inner space 4. The smaller inner space 4 can be used to save moisture-absorbing material for a spacer. An indentation 29 can also be provided on the rear wall. By the indentations 16, 29, the hollow profile 1 can also better bend, as the rear wall 5 and the inner wall 6 of the hollow section 1 by this recess 16, 29 move closer to the neutral bevel and less stretched or compressed during bending.

As already mentioned above, the subject of the invention is not on the embodiment of the Fig. 1 to Fig. 2 limited. The invention also relates to spacers from an open hollow profile, where an inner wall 6 is completely or partially omitted. Also in these cases, outgoing from the rear wall 5 webs 3 can be provided in an advantageous manner. There are also other embodiments conceivable.

The spacers shown are preferably made of metal, in particular aluminum or of an aluminum alloy. The embodiments shown represent extruded spacers.

However, the invention can also be realized in coextruded or roll-formed spacer profiles made of steel, stainless steel or plastic.

LIST OF REFERENCE NUMBERS

1,1 '

hollow profile

3

web

4

inner space

5

rear wall

6

inner wall

7

viewing area

10

Side wall

14

perforation

15

shadow groove

16

installation Chung

17

Outer surface of 5

18

Front side of 3

20

disc

21

Disc interior

22

Front side of 20

23

gap

24

accommodation space

25

bottom corner

26

boundary point

27

upper corner

28

Level of 5

29

installation Chung

A

Distance from 3 to 20

B 1

Width of primary sealant surface

B2

Width of secondary sealant surface

Hmax

maximum height of 4

Hmin

minimum height of 4

L1

Length of the webs 3

Claims (11)

1. Spacer for panes of multiple insulation glass, in particular for use with windows, doors or the like, comprising a fillable, open or closed, rectangular hollow profile (1)-fillable with moisture absorbing material-the internal space (4) of which is bounded for the moisture absorbing material by at least two side walls (10) and a rear wall (5), whereby the internal space (4) has a connection to the pane interspace (21),
   two stays (3) protruding above the rear wall (5) of the hollow profile (1) are provided, whereby each stay (3) forms a boundary for a sealant-filled accommodation space (24) which is bordered on the opposite side by a pane (20), the outer surface (17) of the rear wall (5) between the stays (3) is not coated with sealant,
   the stays (3) are aligned parallel to the panes (20) or are inclined toward one another,
   thereby characterized in that
   for achieving a sufficiently large accommodation space (24), each part of the rear wall (5) lying beyond the stay (3) is designed as a deeper-set step (28).
2. Spacer pursuant to Claim 1, thereby characterized in that the stays (3) have a minimum length (L1) of 1.5 mm.
3. Spacer pursuant to Claim 2, thereby characterized in that the stays (3) have a maximum length (L1) of 5 mm.
4. Spacer pursuant to Claim 2, thereby characterized in that the stays (3) of a pliable spacer have a length (L1) of 1.5 mm to 3 mm.
5. Spacer pursuant to one of the claims 1 to 4, thereby characterized in that the closed hollow profile exhibits an internal space (4) with a rectangular cross section, whereby the internal space (4) is bordered in the direction of the pane interspace (21) by an inner wall (6) provided with perforations (14), and the side walls (10) with the adjacent panes (20) form an interspace (23) for the sealant.
6. Spacer pursuant to Claim 5, thereby characterized in that the bottom corner (25) of the side wall (10) extends outward and represents a bottom boundary (26) for the interspace (23).
7. Spacer pursuant to Claim 5, thereby characterized in that the sealant in the interspace (23) concerns a primary sealant, preferably butyl, and the sealant in the accommodation space (24) concerns a secondary sealant, preferably polysulfide, polyurethane or silicon.
8. Spacer pursuant to one of the claims 1 to 7, thereby characterized in that the visible surface (7) of the inner wall (6) of the hollow profile (1) is provided with two shadow grooves (15) into which, when stacking the hollow profiles (1, 1'), the ends of the stays (3) of the hollow profiles (1') engage.
9. Spacer pursuant to one of the previous claims 1 to 8, thereby characterized in that it is made of metal, preferably aluminum or an aluminum alloy.
10. Spacer pursuant to one of the previous claims 1 to 8, thereby characterized in that it is made of metal, preferably steel or stainless steel.
11. Spacer pursuant to one of the previous claims 1 to 8, thereby characterized in that it is made of coextruded plastic.

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