EP3428359B1 - Fastening bracket for a facade insulation system and facade insulation system comprising such a fastening bracket - Google Patents

Description

The present invention relates to a mounting bracket for mounting posts of an insulating facade that can be mounted in front of an outer wall of a building. Such building exterior walls sometimes have insufficient thermal insulation. There are several ways to improve this thermal insulation.

The outer wall of the building can be covered with insulating boards - usually made of polystyrene or mineral fiber - and plastered. It is also possible to enclose insulation between the outer wall of the building and the clinker facing wall in front of it. Finally, it is known to fasten horizontally or vertically extending support slats, preferably made of wood, directly to the outside wall of the building and to fill the compartments between the support slats with an insulating material - using a blow-in method or as a clamping felt; from the outside, the framework is closed by a cladding made of wood, wood-based materials, slate or other materials.

The present invention relates in particular to an insulating facade that can be mounted in front of an outer wall of a building and has a fastening bracket with the features of claim 1. From the patent relating to the present applicant DE 20 2013 011 565 U1 An insulating facade mounted in front of an outer wall of a building is known, which consists of predominantly horizontal thresholds, which at least in sections bear against the outer wall of the building and are attached to it, vertically extending stems, which extend between adjacent thresholds, insulating planking provided on the outside and at a distance from the outer wall of the building and insulation provided between the planking and the outer wall of the building. Out of IT BZ20 110 044 A1 another insulation facade system with a mounting bracket is known.

The present invention is based on the problem of specifying an improved insulating facade of the type mentioned at the outset. The present invention wants to improve the mountability of the insulating facade, in particular with regard to load-bearing capacity.

To solve this problem, a mounting bracket with the features of claim 1 and an insulating facade with the features of claim 12 is specified with the present invention. With this insulating facade, the stems are provided at a distance from the outer wall of the building. Accordingly, the standards are not directly on the outside wall of the building and thus do not bridge the gap between the outer planking and the outer surface of the building's outer wall as components with relatively good thermal conductivity. Furthermore, it is not necessary to adjust the stems with their inner narrow surface directed towards the building's outer wall to any bumps or bulges of the building's outer wall. Rather, the posts are at a sufficient distance from the outer wall of the building in such a way that the outer wall of the building itself usually does not hit the inner narrow surfaces of the posts in the event of a relatively uneven course. In this case, thresholds can also rest on the outer wall of the building only in sections, ie only over a portion of their horizontal extent. This further reduces the effort involved in individually adapting the framework structure, formed from sleepers and posts, to the special contour of the outer wall of the building.

According to the present invention, to fasten the above-described combination of sleepers and posts, each post is connected to the outer wall of the building with at least one mounting bracket having the features of claim 1 . This solution has the advantage that the installation of the insulating facade described above in the prior art is only relieved via the thresholds due to the direct attachment of the posts to the outer wall of the building. This makes it possible to connect the load-bearing structure of the insulating façade, consisting of thresholds and posts, to the building's outer wall via an increased number of contact points.

The fastening of the thresholds to the outer wall of the building, as well as the fastening of the posts, is usually carried out using dowels that interact with the outer wall of the building. With the present invention each dowel can be used, which have a lower load capacity. By increasing the contact points and thus the dowels for fastening the thresholds and standards, it is nevertheless ensured that the insulating facade is mounted on the building's outer wall with the necessary holding force.

The thresholds in the from the German utility model DE 20 2013 011 565 U1 be connected to the outer wall of the building in a known manner. The details of an angle arrangement discussed in the present applicant's earlier utility model application are incorporated into the disclosure content of the present application by this reference.

In particular, the present description is limited to the specifics of the fixing bracket associated with a post, in order to connect the corresponding post to the external wall of the building.

The mounting bracket is the result of practical considerations and investigations into the best possible design of a connecting element for connecting the posts to the building's outer wall, taking into account the fact that the distance between the posts and the building's outer wall can vary. It is important for the present invention to achieve a sufficient load-bearing capacity of the handles. The mounting bracket of the present invention is in terms of the variation of the distances of the standards to the building outer wall as well as the necessary strength to hold the standards while taking into account the best possible connection and transmission of the supporting structure consisting of standards and sleepers on the building outer wall mediated holding forces. It goes without saying that the mounting bracket should be as stiff as possible, but should be designed to be as weight-optimized as possible with regard to the dead weight of the supporting structure and the production costs. Furthermore, the inventors have tried to find a solution that allows adequate support of the stems over the mounting brackets even with a building exterior wall that offers a poor base for anchoring dowels or other retaining elements.

The developments of the mounting bracket according to the invention are specified in the subclaims 2 to 11.

The independent claim 12 claims an insulating facade that can be mounted in front of a building wall and has at least one fastening bracket according to the invention.

Fig. 1

eine Längsschnittansicht eines Ausführungsbeispiels eines Grundwinkels der vorliegenden Erfindung;

Fig. 2

eine Schnittdarstellung entlang der Linie II-II gemäß der Darstellung in Figur 1;

Fig. 3

eine Schnittdarstellung entlang der Linie III-III gemäß der Darstellung in Figur 1;

Fig. 4

eine Längsschnittansicht der Strebe der vorliegenden Erfindung;

Fig. 5

eine Schnittdarstellung entlang der Linie V-V gemäß der Darstellung in Figur 4;

Fig. 6

eine Schnittdarstellung entlang der Linie VI-VI gemäß der Darstellung in Figur 4 für erste bis dritte Strebe;

Fig. 7

eine Längsschnittansicht eines Ausführungsbeispiels eines Zusatzwinkels der vorliegenden Erfindung;

Fig. 8

eine Schnittdarstellung entlang der Linie VIII-VIII gemäß der Darstellung in Figur 7

Fig. 9

eine Schnittdarstellung entlang der Linie IX-IX gemäß der Darstellung in Figur 7;

Fig. 10

eine Längsschnittansicht einer sich über mehrere Geschosse erstreckenden Dämmfassade; unter Verwendung der in Figuren 4a, 5 und 6 gezeigten Strebe;

Fig. 11

eine Draufsicht auf ein Ausführungsbeispiel eines Befestigungswinkels;

Fig. 12

eine um 90° versetzte Draufsicht des Befestigungswinkels nach Figur 11;

Fig. 13

eine stirnseitige Ansicht des Befestigungswinkels nach Figuren 11, 12; und

Fig. 14, 15

Längsschnittansichten eines Stieles mit einem Ausführungsbeispiels des Befestigungswinkels bei Montage an einer Gebäudeaußenwand.

Further details and advantages of the present invention result from the following description of an exemplary embodiment in conjunction with the drawing. In this show:

1

a longitudinal sectional view of an embodiment of a base angle of the present invention;

2

a sectional view along the line II-II as shown in figure 1 ;

3

a sectional view along the line III-III as shown in figure 1 ;

4

Figure 12 is a longitudinal sectional view of the strut of the present invention;

figure 5

a sectional view along the line VV as shown in figure 4 ;

6

a sectional view along line VI-VI as shown in figure 4 for first to third strut;

7

a longitudinal sectional view of an embodiment of an auxiliary bracket of the present invention;

8

a sectional view along the line VIII-VIII as shown in FIG figure 7

9

a sectional view along the line IX-IX as shown in figure 7 ;

10

a longitudinal sectional view of an insulating facade extending over several floors; using the in Figures 4a, 5 and 6 shown strut;

11

a plan view of an embodiment of a mounting bracket;

12

a top view of the mounting bracket offset by 90° figure 11 ;

13

an end view of the mounting bracket Figures 11, 12 ; and

14, 15

Longitudinal sectional views of a stem with an embodiment of the mounting bracket when mounted on a building exterior wall.

The Figures 1 to 3 show an embodiment of a base angle 10 with a long leg 12, which is about four times longer than a short leg 14 of the base angle 10. The two legs 12, 14 are formed by bending a sheet metal strip, which has a width corresponding to about half the length of the short leg 14 has. This sheet metal strip is previously provided with various enforcements. Thus, the longer leg 12 preferably has three substantially equidistant bolt bores 16a-16c. The uppermost bolt hole 16c has a distance from an upper, free edge of the longer leg 12 of about 2 centimeters. An elongated hole 18 is provided between the lower pin hole 16a and the middle pin hole 16b.

The shorter leg 14 has two bolt holes 20a, 20b. The front pin hole 20b is spaced about 15mm (distance between the center point of the pin hole 20b and the front edge of the shorter leg 14). There is a slot 24 between the bolt hole 20a and a corner 22 of the base bracket 10.

All bolt holes 16, 20 have approximately identical diameters of 10.5 to 11 mm. They are designed in such a way that an M10 fastening screw or a dowel with a diameter of 10 mm can be passed through the bolt hole 16, 20. The elongated hole 18 has a somewhat smaller diameter (9 mm). The elongated hole 24 has a smaller diameter, for example a diameter of 4 or 6 mm.

Figures 4c and 5 and 6 illustrate an embodiment of a strut 30. The strut 30 has an upper contact area 32, a lower contact area 34 and a strut area 36, which specifies the main extension direction of the strut 30. Compared to this main extension direction, the upper contact area 32 and the lower contact area 34 are modified by bending. This modification is always carried out with the aim of placing the upper contact area 32 flat against the upper end of the longer leg 12 and providing the lower contact area 34 at least parallel to the direction of extension of the shorter leg 14 . In other words, the lower contact area 34 and the upper contact area 32 run at right angles to one another.

The upper contact area 32 is provided with an upper pin hole 38a, the lower contact area 34 with a lower pin hole 38b.

The Figures 7 to 9 illustrate an exemplary embodiment of an additional angle 40. This additional angle 40 has a first additional angle leg 42 and a second additional angle leg 44 extending at right angles thereto, which are connected to one another via a corner 46 and extend at right angles to one another. The first additional angle leg 42 has two bolt holes 47a, 47b, which are provided in the longitudinal direction of the additional angle leg 42 one behind the other. At the level of the rear pin hole 47a there are two smaller holes 49 which are each formed between the pin hole 47a and the longitudinal edge of the first additional angle leg 42.

The pin holes 20a, 20b of the shorter leg 14 of the basic angle 10 are aligned with the pin holes 47a, 47b of the additional angle 40 and have identical diameters as these. Its additional angle leg 42 has identical dimensions to the shorter leg 14 of the basic angle 10. The legs have the same width and the same length measured from the respective corner 22 or 46. At the level of the bolt hole 47a, there are between the bolt hole and a side edge of the Leg 42 smaller holes 49. The smaller holes 49 have a smaller diameter than the bolt holes, for example a diameter of 4 to 6 mm. Bore 48 in shorter leg 44 has the same diameter as bore 16 and is the same distance from corner 46 as bore 16 is from corner 22.

figure 10 shows a longitudinal sectional view of an insulating facade 100, which is mounted using the fasteners described above on a building exterior wall 102. The insulating facade 100 comprises wood fiber insulation boards 104 provided as outer planking, which are arranged vertically one above the other and side by side and via a Truss 106 are held. The truss 106 includes sleepers 108 that extend between the inner surface of the wood fiber insulation board 104 and the outer surface of the building exterior wall 102 and are connected to the building exterior wall 102 . Between these predominantly horizontally extending elements of the framework 106, posts 110 extend, which are connected at the end to the respective associated sleeper 108. As can be seen, the posts 110 have a significantly smaller thickness than the sills 108. An inner narrow surface 110a of the posts 110 is therefore provided at a considerable distance from the outer wall 102 of the building. An outer narrow surface 110b of the posts 110 ends flush with a corresponding end surface of the sleepers 108. As a result, a planar bearing structure for the wood fiber insulation boards 104 is created by the framework. Between the posts 110 there is cavity insulation 112, preferably in the form of blown-in wood fibers for space-filling thermal insulation. These blow-in wood fibers 112 fill all cavities between the outer wall 102 of the building and the inner surface of the wood fiber insulation boards 104 .

The cavity insulation 112 also fills the system-related free spaces between the inner narrow surfaces 110a of the posts 110 and the outer wall 102 of the building. This results in a significantly improved insulation value in the area of this thermal bridge. The fastening structure of the insulating facade 100, which is explained in more detail below, is also enveloped by the cavity insulation 112 and is therefore contained.

This attachment structure is described below with reference to various projectiles and figure 10 explained in more detail. Reference is made to different floors defined by the sills 108 . The thresholds 108 can be provided at floor level. Alternatively, they may be located above or below a level separating the actual floors in the building. The individual sleepers 108 in figure 10 Bullets shown are identified as I - III. In this case, the lower sill 108 I is preferably arranged close to the ground at the bottom end of the insulating facade 100 . This lower sill 108I is supported only by an angle assembly 114 mounted on top of the corresponding sill 108I. The angle assembly 114 of the example figure 10 includes a right angle bracket 10 which is attached to the building exterior wall 102 via bolt holes 16a-16c. The shorter leg 14 is screwed to the threshold 108 I via a threaded bolt 116 penetrating the threshold 108 I . This threaded bolt 116 passes through the bolt hole 20a. In the embodiment shown, a strut 30 is used, as shown in Figures 4c, 5 and 6 is shown, ie the longest strut. This is about one formed upper fastening bolts 118c, which, like the other fastening bolts 118a, 118b, is screwed into the outer wall of the building. The upper fastening bolt 118c passes through the upper bolt bore 16c and the upper bolt bore 38a of the strut 30. Fastened to the longer leg 12 in this way, the lower contact area 34 extends parallel to the sill 108 I and is fixed to it by a further threaded bolt 116. As can be seen from FIG. 11a, the lower contact area 34 of the strut 30 is mounted at a considerable distance from the front, free end of the shorter leg 14 and on the upper side of the sill 1081. In the present case, the distance corresponds approximately to the direction in which the shorter leg 14 extends.

The second floor is formed by a threshold 108 II. This is fastened on its upper side to the outer wall 102 of the building in the manner described above. On the underside there is the previously described additional angle 40, which has its bolt hole 47a passed through by that threaded bolt 116 which also passes through the bolt hole 20a of the shorter leg 14. A fastening bolt 118 which is screwed to the outer wall 102 of the building passes through the bolt bore 48 .

The upper sill 108 III is held only by the additional bracket 40 in the manner already described above. However, a threaded bolt 116 is dispensed with. Rather, the smaller holes 49 are penetrated by wood screws 119 which are screwed into the underside of the threshold 108 III. Such an attachment of the upper sill 108 III, which is easier compared to the other floors, is possible since it does not have to absorb any vertical loads.

The Figures 11 to 13 illustrate an exemplary embodiment of a fastening bracket 120 which is bent over in an L-shape in cross section and has a shorter contact leg 122 which can be placed on a building wall and a fastening leg 124 which can be placed on the post 110 . The legs 122, 124 extend at right angles to one another (cf. figure 13 ). As for the rest figure 11 clarified, the fastening leg 124 forms a trapezoidal section 126 whose height HT is between 40% and 60% of the height H of the fastening leg 124 . The height H is between 100 and 130 mm, whereas the height HT is usually between 45 and 60 mm. The trapezoidal section 126 is designed as an isosceles trapezoid, the longer of the parallel sides identified by reference numeral 128 being between 330 and 380 mm long, whereas the shorter side identified by reference numeral 130 has an extent of between 160 and 200 mm. The trapezoidal section 126 rises from one indicated by reference numeral 132 Rectangular base, over which the trapezoidal section 126 merges with the contact leg 122 formed with a rectangular base area. The rectangular base 132 has a height HB of between 10 and 20 mm.

A rectangular portion 134 is provided on the trapezoidal portion 126 on the opposite side of the rectangular base 132 . At the transition formed by the shorter side 130 between the rectangular section 134 and the trapezoidal section 126, a series of bores 136 extending in the longitudinal direction of the contact leg 122 are provided, which have a diameter of between 4 and 6 mm, 5 mm in the exemplary embodiment shown , to connect wood screws driven through the mounting holes 136 to the associated stem 110. In the present case, the fastening bores 136 are arranged in two strands S and in each case in two parallel rows which are provided offset relative to one another. The offset is between 2 and 10 mm. In the embodiment shown, four different rows of mounting holes 136, identified by reference numerals R1 through R4, are provided. The offset V makes it possible to connect posts 110 that are at different distances from an outer wall 102 of a building with the mounting bracket 120 .

How figure 11 can be seen, the fastening bores 136 are exclusively in the rectangular section 134.

Bores in a row R1 - R4 arranged one behind the other in the longitudinal direction have a spacing of about 80 mm ± 10 mm. The fastening bores 136 of the immediately adjacent row R1 are located in the middle between the bores of the associated adjacent row R2.

The distance between the fastening bores 136 and the free end of the contact leg, which is formed by the rectangular section 134, is between 6 and 8 mm, so that there is sufficient space for mounting the wood screw on the contact leg. Immediately adjacent rows R1, R2 or R3, R4 have a lateral spacing of a few mm as an offset V, preferably of about 5 mm±0.5 mm.

How figure 12 can be seen, the contact leg 122 has a width B of about 45 to 55 mm. The contact leg 122 is traversed by three bores 138, the diameter of which is between 9 and 12 mm, in the present case approximately 10.5 mm. Over the length of the contact leg 122 three holes 138 are present recessed, the outer Holes 138.1 and 138.3 have a distance to the end faces of the mounting bracket 120 of about 20 mm ± 5 mm.

The mounting bracket 120 is made from galvanized sheet metal with a thickness of 3 mm in the present case.

The Figures 14 and 15 show various sectional views of a post 110 attached to the outer wall 102 of the building via the attachment bracket 120. The Figures 14 and 15 make it clear that the stem 110 is fastened to the outside of the fastening leg 124 opposite the contact leg 122 . Accordingly, stem 110 is on the other side relative to abutment leg 122. In the embodiment of FIG figure 14 the stem 110 is spaced from the building exterior wall 102 by approximately 9 mm. In the embodiment according to figure 15 by about 45 mm. In both configurations, the handle 110 is held on the mounting bracket 120 by a total of 10 wood screws 140 which are driven through the corresponding mounting bores 136 and screwed to the handle 110 . This results in a solid mounting of the stems 110 of the insulating facade. Due to the mounting bracket 120, the posts 110 can be mounted and held regularly at distances of between 0 mm and 65 mm from the outer surface of the outer wall 102 of the building. The longest length of the stem 110 in the cross-sectional direction is between 120 and 180 mm. Total thicknesses of the insulating facade can be achieved from 170 mm to 235 mm when using standard wooden handles with a cross section of 60x100 mm. Greater insulation thicknesses of up to 370 mm can be achieved by using deeper wooden posts or by doubling the posts in the area of the 120 mounting bracket.

Reference List

10

base angle

12

long thigh

14

short leg

16a,b,c

bolt hole

18

Long hole

20a, b

bolt hole

22

Corner

24

Long hole

30

strut

32

upper investment area

34

lower investment area

36

strut area

38a

upper bolt hole

38b

lower bolt hole

40

additional angle

42

first additional angle leg

44

second additional angle leg

46

Corner

47a, b

bolt hole

48

bolt hole

49

small hole

100

insulating facade

102

building exterior wall

104

wood fiber insulation board

106

half-timbered

108

threshold

110

stalk

110a

inner narrow surface

110b

outer narrow surface

112

room-filling thermal insulation/blown-in wood fibers

114

angular arrangement

116

threaded bolt

118

bolt

119

wood screw

120

mounting brackets

122

contact leg

124

mounting leg

126

trapeze section

128

longer side

130

shorter side

132

rectangle base

134

rectangle section

136

mounting bracket

138

drilling

140

wood screw

H

Height of mounting bracket

HT

Height trapezoid section

B

Width of the contact leg

R1-R4

Rows of mounting holes 136

S

strand

V

offset

Claims (12)

1. A fastening bracket (120) for fastening studs (110) of an insulating facade (100) mountable in front of an external wall (102) of a building, having an abutting leg (122) placeable against the external wall (102) of the building and a fastening leg (124) placeable against the stud (110) and being provided with a trapezoidal portion (126) characterized in that above the shorter one of the parallel sides (130) of the trapezoidal portion (126) on the side of the trapezoidal portion (126) opposite the abutment leg (122) a rectangular portion (134) is provided, the trapezoidal portion (126) being formed by an isosceles trapezoid.
2. The fastening bracket (120) according to claim 1, characterized in that the trapezoidal portion (126) occupies 40% to 60% of the height (H) of the fastening leg (124).
3. The fastening bracket (120) according to claims 1 or 2, characterized in that the parallel sides (128, 130) of the trapezoidal portion (126) have an aspect ratio between 0.4 and 0.6, preferably 0.5 +/- 0.025.
4. The fastening bracket (120) according to any one of the preceding claims, characterized in that the rectangular portion (134) forms the free end of the trapezoidal portion (126).
5. The fastening bracket (120) according to any one of the preceding claims, characterized in that the abutment leg (122) has the same length as the longer one of the parallel sides (128) of the trapezoidal portion (126).
6. The fastening bracket (120) according to any one of the preceding claims, characterized in that the abutment leg (122) comprises a plurality of holes (138) provided sequentially in the longitudinal direction and having a diameter between 9 and 12 mm.
7. The fastening bracket (120) according to any one of the preceding claims, characterized in that the fastening leg (124) comprises a plurality of fastening holes (136) provided sequentially in the longitudinal direction and having a diameter between 4 and 6 mm.
8. The fastening bracket (120) according to claim 7, characterized in that the fastening holes (136) are provided in a plurality of parallel rows (R1-R4).
9. The fastening bracket (120) according to claims 7 or 8, characterized in that two rows of fastening holes (136) are provided immediately adjacent to each other so that the holes (136) of the two rows (R1, R2; R3, R4) are slightly staggered.
10. The fastening bracket (120) according to any one of claims 7 to 9, characterized in that the fastening holes (136) are recessed only in the rectangular section (134).
11. The fastening bracket (120) according to any one of the preceding claims, characterized in that the fastening bracket (120) is formed from a galvanized sheet having a thickness between 2 mm and 4 mm.
12. An insulating facade (100) mountable in front of an external wall (102) of a building, comprising sill members (108) extending mostly in the horizontal direction which can be placed against the external wall (102) of the building and fastened thereto at least in sections, vertically extending studs (110) which extend between adjacent sill members (108), an insulating sheathing (104) provided on the outside and spaced from the external wall (102) of the building, an insulation (112) provided between the sheathing (104) and the external wall (102) of the building, and at least one fastening bracket (120) according to any one of the preceding claims,
    characterized in that
    the studs (110) can be attached to the external wall (102) of the building by means of at least one of the fastening brackets (120) according to any one of the preceding claims such that they are spaced from the external wall (102) of the building.

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