CA2047233A1

CA2047233A1 - Process for securing components and assembly base for implementing the process

Info

Publication number: CA2047233A1
Application number: CA002047233A
Authority: CA
Inventors: Mario Flepp
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-22
Filing date: 1990-12-17
Publication date: 1991-06-23
Also published as: DK0460140T3; DE4002474A1; AU6900291A; WO1991010021A1; DE59005952D1; EP0460140A1; ATE106485T1; EP0460140B1

Abstract

ABSTRACT OF THE DISCLOSURE

The assembly base consists at least partly of synthetic foam and is fitted in a recess in external insulation arranged on a structure. The recess extends into the surface of the structure and the assembly base is secured directly to the structure by an adhesive and/or mechanical securing means. The component is secured to the assembly base. It is thus possible in the simplest manner to secure a component to a structure fitted with external insulation without adversely affecting the properties of said external insulation.

Description

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WO91/10021 PCI/CH90/00286 ~ :

~; and ~ssembly BasQ ;

The invention concerns a process for securing components to a structure provided with an external insulation in accordance with the essence of Claim I as well as an assembly base for ~ ~-implementing the process.

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The term "exterior insulation" shall be understood in the widest sense here and applies here to any insulation layer arranged on `
the surface of a structure, regardless whether it is on the outer :
face or the inner face of a space. ; ;

The securing of components to a structure provided with exterior insulation has long caused great dif~lculties because, on the one hand, the exterior insulatioIl has insufficient stability for : :
securing components and, on the other hand, in securing the : ~ :

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components, the insulating properties of the exterior insulation should be maintained as unaf~ected as possible.

Thus, it is known, for example, from DE-OS 3307634 to arrange in insulation elements, for an exterior insulation, along the entire length of the elements, a groove-shaped recess into which, as assembly base, a fastening strip is glued. The arrangernent of a fastening strip along the entire length of a structural element, is, on the one hand, difficult to achieve on site, and, on the other hand, an arrangement of a fastening strip in certain places only, does not offer sufficient support for a component to be fastened. Moreover, the fastening strip which is exposed toward the outside interferes with the insulating properties of the exterior insulation. Most particularly, the surface characteristics of the exterior insulation are adversely affected at the locations at which the fastening strip is arranged.
The latter form, at the surface, low-temperature bridges which have an adverse effect on the cladding to be installed over it and cause there, under certain atrnospheric conditions, moisture condensation. The latter, in turn, has as a consequence the build-up of dirt and/or color changes of the covering.

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---` 2~72~3 In CH-PS 674 234, an analogous process is described in which, however, instead of long grooves, delimited recesses are formed by means of a heated resistance wire (recesses) which do not reach the structure. Instead of the fastening strips, mounting plates of great mechanical stability are glued into the recess This process also presents the disadvantages already described above, with the additional problem that cutting out the recess by means of the heated resistance wire leads to greater irnprecisions with respect to shape, dimensional prerision, and surface quality of the recess. In particular, as a result of the fusion-cutting, a fused-on surface layer is produced in the recess, thus making any stable and durable glue-bonding of the mounting plate at least considerably more diff~lcult. Moreover, such a mounting plate is not suitable for all fastening jobs since its hold in the exterior insulation is limited, i. e. it can be ripped from the insulation, in particular if the latter is aged.
Additionally, the fastening properties of the component are lost in the exterior insulation if the latter is weathered or destroyed in case of fire.

The object of the invention consists in irnproving a process and . . .

.. 2f)ll72~3 an assembly base of the type mentioned in the introduction in such a way that the mentioned disadvantages are avoided.

The task is sohted in accordance with the invention~

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a) in the process mentioned in the introdùction, ;~
by the characterizing features of Claim 1;
b) in the assembly base mentioned in the introduction, by the character~zing features of Clairn 9.
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By making the recess in such a way that it reaches the surface of the structure and securing the assembly base directly to the structure, considerably better and more durable fastening of the assembly base and, as a result, also of the fastening of the :
component to the assembly base can be assured. This assures the fastening properties even if the exterior insulation should weather or burn. Because the assembly base consists at last in part of foamed plastic, it forms an insulation which does not interfere with the insulating properties of the exterior insulation or does so only to an insignificant extent so that low-- `

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temperature bridges and the disadvantages related to it are avoided. This is additionally promoted by the fact that, as a result of the direct securing to the structure, the assembly base can be kept very small so that, by this fact also, any adverse effect on the exterior insulation can be avoided to a great extent. The lirnited structural siæ of the assembly base finally offers the advantage that it can be attached in a simple manner at any desired location of the exterior insulation. Moreover, the assembly base which consists at least in part of foamed plastic, can also be worked with easy means so that it can be adapted, in a correspondingly easy manner, to the exterior insulation, in particular to the thickness of the exterior insulation so that it ends, for instance, flush with the latter. In particular, when the assembly base contains a non-flammable frame, the connection of the component to the structure is preserved in case of fire, even if the exterior insulation should be destroyed by the fire Advantageous embodiments of the process are described in Claims 2 through 8, those of the assembly base in Claims 10 through 17.

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~7233 The assembly base can, in the simplest case in accordance with Claim 2, be glue-bonded to the structure and, if necessary, be additionally to the exterior insulation. For more involved fastening jobs, the mounting plate is connected to the structure in accordance with Claim 3, by means of mechanical fastening means, for example, by screws.

For simple fastening jobs, it suffsces if the assembly base consists merely of foamed plastic. For more in-volved fastening jobs, an embodiment of the process in accordance with Claim 4 is advantageous; in this respect, it may be expedient to screw-connect the mounting plate ~n accordance with ClaLrn S and the structure; in doing so, the connection, if applicable, can be further reinforced by spacers.

Particularly expedient is an embodiment in accordance with Claim 6, where, on the outer face of the assembly base, an insulation layer is present which not only ends flush with the surface of the exterior insulation but preferably also consists of the same or similar material as it so that the fastening base has the same or at least similar insulating and surface properties as 0~72~3 '.- ' the exterior insulation itself. As a result of the assembly base, the properties of the exterior insulation are thus least adversely ~
affected. `~ :;

Assembly bases of different materials can be used, but particularly preferred is such a base which, in accorclance with Claim 7, consists at least partially of foamed polyurethane.

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Foamed polyurethane is distinguished by the characteristics of high stability and good insulation.

On principle, it is possible to use assembly bases of different cross section shapes, with a corresponding recess then having to be made in the exterior insulation. This can, for instance, be accomplished by means of punching patterns. For exterior insulations from thermoplastic materials, the punching pattern can preferably be heated. Particularly preferred is, however, a process in accordance with Claim 8 in which assembly bases with a circular cross section are used. A corresponding recess -~
in the exterior insulation can be made in a very easy manner by ; ~
means of a milling cutter so that such assembly bases can be ~ ;
assembled particularly easily and quickly. Milling the recess '; -' 2OL~7233 also creates in the recess a surface (which is) particularly suitable for glued connections. Furthermore, there is the additional fact that, as a result of the circular cross section corners in the recess are eliminated which can, in the exterior insulation, cause points of stress from which cracks can originate, A circular recess in the exterior insulation and a corresponding cylindrical assembly base thus bring about a low-stress and, as a result, particularly durable and safe arrangernent.

For the assembly base suitable for implernenting the process in accordance with Claim 9, it is essential that it has a mounting block of foamed plastic which has a hardness suitable for receiving mechanical fastening means. This assures that the mounting block, in its arrangernent in an exterior insulation, interferes as little as possible with the insulating properties of the exterior insulation and yet allows the arrangement of fastening means. The requirements set (here) are solved in a particularly ideal manner in an embodiment of the assembly base in accordance with Claim 10, i. e. in a mounting body of foamed polyurethane. For improving the stability properties, 7 ~ ~ 3 the assembly base can be further developed in accordance with Claim 11.

In order to interfere as little as possible with the properties of the exterior insulation, it is advantageous to further develop the assembly base in accordance with Cla~m 12. Thearrangement of the insulation layer offers additionally the advantage that the ~ ~ ~
assembly base can, additionally, be easily adapted to the ~ `
thickness of an exterior insulation by removing, after assembly, ~ ~;
the part of the insulation layer projecting above the exterior insulation.

If the assembly base is to be attached to the structure, by means of mechanical fastening means, it (the assembly base) is ; ~:~
. .
advantageously designed in accordance with Claims 13 and 14.
.
For higher quality fastening jobs, a further development of the ~ `

assembly base in accordance with Claim 15 is recommended, i.e. ; ~ ~:
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the arrangement of a mounting plate, preferably of metal, in the ;: :: -assembly base. The stability characteristics of the assembly base can be further improved by a further development in accordance with Claim 16.
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~ ~ 7~3'3 The assembly base can have different cross section shapes, particularly advantageous is, however, an embodiment in accordance with Claim 17. Such a cylindrical assembly base requires, in an exterior insulation, merely a circular recess which can be made, by means of a milling cutter, in a sirnp:le manner, as mentioned above already. Moreover, such an assembly base provides a low-stress arrangement of the assembly base in an exterior insulation.

Sarnple embodirnents of the object of the invention are described in the following in greater detail, based upon the drawing; the following is shown:

Figure lA: the simplest form of an assembly base on a structure, in a longitudinal section;

Figure lB: the assembly base of Figure lA with an additional insulation layer, in a longitudinal section;

Figure 2A: an assembly base secured on the structure 11 ~

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by means of a screw, in a longitudinal ;
section;

, Figure 2B: the assembly base of Figure 2A with an , ~ . .-.
additional insulation layer, in a . ~
longitudinal section; ~ ~
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Figure 3A: an assembly base with inserted mounting plate and screw-fastening, in a longitudinal section;

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Figure 3B: the assembly base of Figure 3A with additional support of the mounting plate by means of a spacer sleeve, in a :: ~
Iongitudinal section.
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Figures IA and lB show a structure 4 provided with an exterior insulation 2. In exterior insulation 2, by milling it out, for ;~
example, a circular recess 6 is made up to the surface of :
structure 4, in which (recess 6) an assembly base 8a and/or 8b ~ ~:
is arranged. The assembly base is glue-bonded with structure ~;' """,`.

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t72~3 4 and, if necessary, additionally with the walls of recess 6. In the case of Figure lA, the assembly base consists of a mounting body lOa of foamed polyurethane which has, ~or exarnple~ a specific weight of 2 000 N/m3. In assembly base 8b, mounting body lOb is shorter and bears, at its surface, an insulation layer 12 which is softer than the material of the mounting body and corresponds preferably with the material of exterior insulation ,, ".

2. Assembly base 8a andlor 8b can be very easily mechanically worked so that, after attachrnent in recess 6 of exterior insulation 2 and structure 4, it can be easily adapted by ~-`
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mechanical work, for example by cutting, sawing, grinding or similar, to the thickness of the exterior insulation so that the upper edge of assembly base 8a and/or 8b is flush with the ; :`:
surface of exterior insulation 2. As furtherrnore shown by :
Figures lA and IB, to assembly base 8a and/or 8b, a .,:
component 14 is fastened by means of screws 16 which are -screwed into mounting body lOa, lOb of assembly base 8a, 8b.
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Figures 2A, 2B show assembly bases 18a and 18b which, are again arranged in a recess 6 of exterior insulation 2 of a .
structure 4, with these assembly bases essentially corresponding -- ~.

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to ass~mbly bases 8a ana 8b of Figures lA and lB, but being screwed together with structure 4 by means of a fastening screw 20. For this purpose, assembly bases 18a, 18b have a through-opening 22 for receiv~ng shaft 24 of fastening screw 20 as well as a recess 26 for receiving head 28 of the fastening screw. In the case of Figure 2A, recess 26 and through-opening 22 are both arranged in mounting body 30a. In the case of Figure 2B, the through-opening 22 in mounting body 30b and recess 26 are arranged in an insulation layer 32 which is situated above mounting body 30b and ends nush at the surface of exterior .
insulation 2. Fastening screw 20 is anchored in a peg 34 in structure 4. The space of recess 26 situated above head 28 is filled up with insulating material 36. Fastening of assembly base 18a and/or 18b in exterior insulation 2 on structure 4 can be accomplished exclusively by means of fastening screw 20 or additionally by gluing in assembly base 18a andlor 18b in analogy to the embodiment of Figures lA and/or lB.

Figures 3A and 3B show additional assembly bases 38a and 38b which are again arranged in a recess 6 of exterior insulation 2 of a structure 4. The assembly bases 38a and 38b are a further :, .. ~ . . -... ~ , : ~
... . .

~ ~ ~ r~ 2 ~ 3 development of assembly base 18b, above mounting body 40 facing structure 4, a mounting plate 42 of metal, preferably aluminum, being arranged above which, in turn, in insulation layer ~4 is situated which ends flush with the outer face of exterior insulation 2. Assembly bases 38a and 38b are again fastened, by means of fastening screws 46, to structure 4 which, for this purpose, has pegs 48 into which the fastening screws 46 are screwed. The assembly bases contain in the insulation layer, recesses 50 for receiving the heads 52 of fastening screws 46. In mounting plate 42, in each case, a perforation 54 is arranged and in mounting body 40 a through-opening 56 for passage of shaft 58 of fastening screw 46 is arranged. In the case of Figure 3B, in through-opening 56, there is additionally a spacer sleeve 60 is arranged for supporting mounting plate 42 on structure 4.
The empty space of recess 50 of assembly bases 38a and 38b, . . ~.
situated above head 52 of fastening screw 46, can again be filled -up by an insulation material 62.

Assembly bases 38a and/or 38b of Figures 3A and 3B are used ~;
for fastening components 64 such as fittings for doors, windows ~ - -or similar to a structure 4 which has an exterior insulation 2. ~
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Securing assembly base 38a and/or 38b is accomplished in the manner already described above. Then, in assembly base 38a andtor 38b, at the intended fastening point, a perforation 66 is fabricated which reaches through mounting plate 42. Moreover, into the assembly base, in particular through mounting plate 42, a thread 6B is cut, and finally component 64, in the forrn of a fitting, is screwed into assembly base 38a and/or 38b.

This assembly base offers particular safety in the case of a fire, because the support structure provided by fastening screws 46 and metallic mounting plate 42, holds component 64 safely even if insulation layer 44 and mounting body 40 should be destroyed by fire.

As already mentioned above, in the sarnple embodiments described, the mounting block consists of foamed polyurethane which may have different specific weights, with one of 2 000 N/m3 being a preferred value. The mounting block can preferably be reinforced by glass fibers. An insulation layer situated above the mounting block can consist of the most varied materials and is expediently selected in such a way that : . . . . .

7 2 s~ 3 it corresponds with the exterior insulation of a structure or at least approximates its physical properties very closely. The insulation layer consists, for examplet of one of the ~following) ~;
materials: polystyrene, polyolefin, polyaromate, polyester, polyurea, hard fibers or similar. ~ ` ;;
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The fastening of the assembly bases to the structure can be -`. `
accomplished by in-gluing, using a known adhesive such as .~
silicon-putty and/or by means of one or mores screws. ~ . `

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REFERENCE LIST

2 Exterior insulation 4 Structure ;~
,"~,~'.:' :.~,, 6 Recess 8a Assembly base ~ ~
8b Assembly base `
lOa Mounting body -' lOb Mounting body 12 Insulation layer ~ 2 14 Component 16 Screw -18a Assembly base 18b Assembly base s ~: .
20 Fastening screw 22 Through-opening 24 Shaft 26 Recess 28 Head 30a Mounting body 30b Mounting body ,r ~ 7 2 3 3 . .. ~..
32 Insulation layer 34 Peg 36 Insulation material 38a Assembly base . - ..
38b Assembly base , Mounting body ~`:
. .: .:
42 Mounting plate .. . , ..- .
44 Insulation layer -: ~ ~
~ '~ `,;
46 Fastening screw 48 Peg `
R~cess -::
52 Head , . ,: .
5~ Perforation `
S6 Through-opening ~ :
58 Shaft Spacer sleeve ~ :
62 Insulating material 64 Component 66 Perforation 68 Thread .
. , :.
:
19 -:

Claims

1. Process for securing components to structure (4) provided with external insulation (2), in external insulation (2) a recess (6) being arranged and in it an assembly base (8a,8b,18a,18b,38a,38b) being fastened, the hardness of which is greater than that of the external insulation, and a component (14, 64) being fastened to the assembly base, characterized by the fact that recess (6) is produced up to the surface of the structure (4) and that, into it (the recess) is fitted the assembly base (8a, 8b,18a,18b,38a,38b) which consists at least partially of foamed plastic, and which is secured to the structure.

2. Process in accordance with Claim 1, characterized by the fact that the assembly base (8a,8b,18a,18b,38a,38b) is glue-bonded to the structure.

3. Process in accordance with Claims 1 or 2, characterized by the fact that the assembly base (18a,18b,38a,38b) is secured, by means of mechanical fastening means (20, 46), to the structure (4).

4. Process in accordance with one of the Claims 1 through 3, characterized by the fact that a assembly base (38a, 38b) is used which contains a mounting plate (42), preferably of metal, to which component (64) is fastened.

5. Process in accordance with Claim 4, characterized by the fact that mounting plate (42) is screw-connected, if necessary using spacers (60) between mounting plate (42) and structure (4), with the latter.

6. Process in accordance with one of the Claims 1 through 5, characterized by the fact that an assembly base (8b, 18b,38a,38b) is used which has, on its side facing away from the structure (4), an insulation layer (12,32,44) which is ended flush with the surface of the external insulation (2) and which preferably consists of the same or similar material as the external insulation.

7. Process in accordance with one of the Claims 1 through 6, characterized by the fact that an assembly base (8a, 8b,18a,18b,38a,38b) is used which consists at least partially of foamed polyurethane.

8. Process in accordance with one of the Claims 1 through 7, characterized by the fact that an assembly base (8a, 8b,18a,18b,38a,38b) is used which has a circular cross section, in the external insulation (2), a recess (6) with a corresponding circular cross section being made, preferably by milling it in.

9. Assembly base for implementing the process in accordance with one of the Claims 1 through 8, characterized by the fact that it has a mounting body (10a,10b,30a,30b,40) of foamed plastic of a hardness suitable for receiving mechanical fastening means (16).

10. Assembly base in accordance with Claim 9, characterized by the fact that the mounting body (10a,10b,30a,30b,40) is made of foamed polyurethane.

11. Assembly base in accordance with Claims 9 or 10, characterized by the fact that the mounting body (10a, 10b,30a,30b,40) is fiberglass-reinforced.

12. Assembly base in accordance with one of the Claims 9 through 11, characterized by the fact that it has, above the mounting body (10b,18b,38a,38b) an insulation layer (12,32,44) the material of which is preferably different from that of the mounting body.

13. Assembly base in accordance with one of the Claims 9 through 12, characterized by the fact that it has at least one through-opening (22,26,50,54,56) for receiving a fastening screw (20, 46).

14. Assembly base in accordance with Claim 12, characterized by the fact that the insulation layer (32,44) has at least one recess (26,50) for receiving the head (28,52) of a fastening screw (20,46).

15. Assembly base in accordance with one of the Claims 9 through 14, characterized by the fact that a mounting plate (42), arranged in parallel to the fastening level and preferably consisting of metal, is allocated to the mounting body (38a,38b).

16. Assembly base in accordance with Claim 15, characterized by the fact that it has at least one recess (54,56) reaching from mounting plate (42) to the underside of the mounting block (40) for receiving the shaft (58) of a fastening screw (46), if necessary, in the recess a spacer sleeve (60) of metal being arranged for supporting the mounting plate (42).

17. Assembly base in accordance with one of the Claims 9 through 16, characterized by the fact that it has a circular cross section.