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Title:
BRACKET DEVICE HAVING AN ADJUSTABLE SUPPORT SCREW ELEMENT FOR SECURING WINDOWS AND DOORS IN AN INSULATION LAYER
Document Type and Number:
WIPO Patent Application WO/2014/126450
Kind Code:
A1
Abstract:
The invention is related to supporting means of window and/or door frames in an insulating layer in a wall opening of a building, in particular for supporting frames of windows and/or doors in an adjustable manner by means of a bracket device being made of a material having a particularly low thermal conductivity coefficient and providing possibility to adjust position of a window and/or a door during their operation, wherein the bracket device is designed to support a window and/or door in an opening of a wall insulating construction of a building. The bracket device consists of the fiberglass bar (4), which is mounted on the load carrying construction (1) of a wall by securing it with fasteners (6), where thermal conductivity of said fiberglass material is 0.32 W/mK, the support leg (5) made of the fiberglass material, which is used when the bar (4) has to project into the insulation layer (2) zone at a greater length and which is fixed to the bar (4) using rivets (10), the threaded element (7) for adjusting distance between the bar (4) and a window frame (11) which is accessed when mounting woks is done from the mounting side of a window, a nut (8) for securing a position of the threaded element (7), the bridge (9) on which a window and /or door frame (11) is positioned and which is secured to a frame (11) with cover screws (14). Otherwise, the distance between frame (11) and the bar (4) is regulated with the special threaded element (16), which position is adjustable with a key (18) through a hole (17) in a frame (11) and doesn't change with respect to a bridge (9), but is moving perpendicularly with respect to the bar (4). The special threaded element (16) is fixed with a washer (15).

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WO2003033834WINDOW WRAP
Inventors:
BALČIKONIS, Remigijus (Teneniai, Šilalės r., LT-75300, LT)
Application Number:
LT2013/000008
Publication Date:
August 21, 2014
Filing Date:
May 16, 2013
Export Citation:
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Assignee:
UŽDAROJI AKCINĖ BENDROVĖ "GOOD SERVICE SOLUTION" (Teneniai, Šilalės r., LT-75300, LT)
International Classes:
E06B1/00
Foreign References:
DE20003819U12001-07-12
EP1626147A12006-02-15
DE202012008857U12012-11-15
EP1544400B12008-09-03
EP2309089A22011-04-13
EP1500768B12009-07-29
Attorney, Agent or Firm:
KLIMAITIENĖ, Otilija (AAA Baltic Service Company, J. Jasinskio g. 16A, Vilnius, LT-01112, LT)
Download PDF:
Claims:
Claims

1. The bracket device with an adjustable support bridge, comprising a bar (4), a support leg (5), a threaded element (7) and a bridge (9), characterized in that thermal conductivity coefficient of the bar (4) of the bracket device is in the range from λ=1 W/(m K) to λ=0,1 W/(m K), and in particular is λ=0,32 W/(m K).

2. The bracket device with an adjustable support bridge according to claim 1 , characterized in that the device is made of fiberglass or other non-metal composite material.

3. The bracket device with an adjustable support bridge according to claims 1 and 2, characterized in that the bar (4) of the bracket device meet at least minimal requirements of the E23 type material in accordance with the standards EN 13706 and EN 1990.

4. The bracket device with an adjustable support bridge according to claims 1 -3, characterized in that it comprises the special threaded element (16), projecting into the drilled hole (17) of a window and/or a door frame (1 1). 5. The bracket device with an adjustable support bridge according to claim 4, characterized in that using the special threaded element (16) with a direct access, allows performing installation works in an opening of a wall after the wall has been fitted with an insulation layer.

6. The bracket device with an adjustable support bridge according to claims 4 and 5, characterized in that using the special threaded element (16) with a direct access, allows adjustment of a window and/or a door frame position from the inner side of a frame (1 1) during operation of the window and/or a door.

Description:
BRACKET DEVICE HAVING AN ADJUSTABLE SUPPORT SCREW ELEMENT FOR SECURING WINDOWS AND DOORS IN AN INSULATION LAYER

Field of Invention

The invention is related to supporting means for window and/or door frames being mounted in an opening of a wall insulating layer of a building, in particular for supporting frames of windows and/or doors in an adjustable manner by means of a bracket device being made of material having a particularly low thermal conductivity coefficient and providing possibility to adjust position of a window and/or a door during their operation, wherein the device is designed to support a window and/or door in an opening of a wall insulating construction of a building.

Background of Invention

The invention relates to devices, designed_ for installation of structural components of a house, especially windows and/or doors, in opening of the main wall, especially in a thermal insulation layer.

Patent EP 1 544 400 Bl discloses a device for installation of windows and doors in an opening of a building wall with an insulating layer. The installation device has a part for fixing it to the main wall, a plate on a stem for supporting a window and for adjustment of its position, wherein the plate can rotate around the stem axis. First disadvantage of said device is that it doesn't have a support leg part between the part of the device, extruding into the insulating layer, and the outer plane of a wall of a building, where said outer plane comes into contact with the outer insulating layer of a building. This makes the device construction weaker compared to the device having said leg element. Second disadvantage is that material of said device is not a cold resistant material.

Patent EP 2 309 089 A2 discloses a device for installation of windows and doors on an edge of an opening of a wall in an insulating layer thereof. The support construction comprises at least two holes for securing it on the inner plane of an edge of an opening, a threaded shank for adjusting a window position, fixing elements of the threaded shank, support element in contact with a window frame and being fixed on the upper tip of the threaded shank. Like in the above mentioned case, two main disadvantages persist: lack of support between part of the device extruding into an insulating layer and the outer plane of a wall, and material of the device construction being cold conductive. Although herein insulating elements are provided between fixing members of the threaded shank and base of the device, as well as between base of the device and fixing elements for fixing the device to the edge of an opening, but it doesn't prevent formation of cold bridging.

Closest to our invention is a device disclosed in EP 1 500 768 Bl for fixing a window or a door frame to an edge of an opening of a wall, having an element for fixing the device to an edge of the opening, threaded element and its fixing elements, and a member for supporting a window and a door frame being fixed on the upper tip of the threaded element. Compared to previously mentioned devices, the device form is more resilient for bending and is coated with an insulating material in order to minimize cold bridging. But there is the risk of damaging the coating and making the insulating layer inefficient.

Advantage of our invention is that part, interacting with the edge of an opening and comprising base longitudinal fixing part and optionally a support part between said base part and the outer plane of the wall, is made of cold resistive material, fiberglass, thus ensuring that there will be no cold bridging between the outer part of a wall and inside of a building. Second advantage is that the bracket is designed to be used when wall partitions are finished - the load bearing wall is built, insulated, finished: the threaded element allows mounting to be performed from the pane side, and also allows adjustment of position of a window and/or a door during their operation. Summary of the Invention

The goal of the invention is to provide thermally efficient means for installation of structural components of a house, especially windows and/or doors, in opening of the main wall, especially in a thermal insulation layer. The device for such installation is a heavy-duty bracket having a wall mounting part and a support part, which is resting on a plane of an external wall, and an adjustable height screw element with a bridge for accurate positioning of a window, wherein said bridge is fixed by additional threaded elements, nuts, and may be adjusted from inside of the window and/or door. The device can take different forms and have a variety of additional elements for reinforcement and positioning adjustment. This device enables window to be installed in the outer insulating layer of a wall, eliminating cold bridging in the mounting area of a window and/or a door. Window and/or door is mounted in insulation layer of a building to maximally eliminate transfer of cold to the edge of an opening. Window and/or door do not become a cold bridge, resulting in higher surface temperature of internal construction in the mounting area. Such installation method creates less thermal losses compared to installation of windows and doors in an opening of the load carrying wall, when insulating layer covers the wall from outside.

Brief description of drawings

Figl . is isotherms 1 of a window element mounted on an edge of an opening in the traditional way. Window/door is not pushed out into an insulation layer, causing the edge of an opening to have lower temperature. This is confirmed by distribution of isotherms. Black line 0 °C, red line 10 °C, blue line 13 °C;

Fig. 2 is isotherms 2 of a window element mounted on an edge of an opening. Window/door is pushed out into the insulation layer, causing an edge of an opening to have higher temperature. This is confirmed by distribution of isotherms. Black line 0 °C, red line 10 °C, blue line 13 °C;

Fig. 3 is the bracket device without the supporting leg, mounted on an edge of an opening; Fig. 4 is the bracket device with the supporting leg, mounted on an edge of the opening; Fig. 5 is the bracket device with the direct adjustment means for adjusting through a hole in a frame of a window/door, mounted on an edge of an opening;

Detailed description of the invention

Power saving is significantly influenced by installation quality of windows and doors. According to experts, 80 % of advantage of contemporary windows is covered by quality of performed installation works and insulation material between a window frame and a wall edge. Modern building and insulation materials enable significant reduction in heat losses. When installing windows and doors in insulation layer, elements made of different materials are used: metal retainers, legs and various wooden structures. Unfortunately, wood and metal have significant disadvantages. Solid wood elements are unwanted because of possible deformations and complication of sealing. In addition, it is difficult to predict installation of windows and/or doors in an insulation layer further away from the load carrying wall. Another negative feature is the natural moisture absorption of wood which results in significant deterioration of thermo-insulating properties, durability, and static properties. Cold bridging is unavoidable due to the use of metal brackets and supporting legs, since in accordance with installation rules for windows and/or doors anchoring points must be used at least every 70 centimeters. Thermal conductivity coefficient of steel and iron is 50 W/mK. Cold bridging forms due to material thermal conductivity coefficient being grater then the thermal conductivity coefficient of materials of surrounding structures. Shifting of isothermal line causes change of the dew point curve; metal parts should be avoided in window installation works, as well as in manufacture of window frames.

Cold bridging is avoided by using brackets made of fiberglass. This is very important for passive buildings, energy-efficient projects and all modern warm buildings where windows and doors are installed in an insulating layer. The bracket is made of fiberglass having thermal conductivity of 0.32 W/mK. In essence, brackets should be made of any material with thermal conductivity coefficient being in the range from 1 W/mK to 0.1 W/mK, ensuring that it will not cause cold bridging. This feature prevents cold bridges in the installation area. Other important properties of fiberglass are: it doesn't require maintenance, is resistant to corrosion and chemicals, durable. Also, use of this material ensures that the bracket device will meet at least minimum requirements of the E23 type material in accordance with standards EN 13706 and EN 1990.

So far, the problem of windows installation in insulating layer has been known and unsolved. Architects and engineers designing window mounting assemblies cannot provide an answer for firm and cold-bringing-free window installation. Lack of solution forced builders to work on their own discretion, making some decisions contradictory to the grounds of construction physics. Our cold bridging resistant bracket is an innovative way for installing windows and doors in an insulation layer. The composite material of the bracket device is as robust as metal and have thermal properties equivalent to wood, also is a dielectric material and is resistant to corrosion and chemicals.

One of the most common structures of walls in new and renovated buildings consists of the load carrying wall being made of bricks and/or blocks, where the outside is covered with an insulation layer (mineral wool, polystyrene or other insulating material). While each case is unique and requires individual solution, the general rule is that windows and doors are installed in an insulation layer having thickness of tens of centimeters or depend on energy efficiency class of a building. Two examples illustrating the distribution of isotherms are provided in Fig. 1 and Fig. 2, clearly confirming this statement.

Temperature of an edge of an opening will be higher if a window is installed in an insulation layer. In some cases, temperature of the outdoor surface of the load carrier wall will be four degrees higher when windows are installed into an insulation layer. The bracket device consists of the fiberglass bar 4, which is secured on the load carrying construction 1 of a wall with fasteners 6, the fiberglass support 5, used when protrusion of the bar 4 into the zone of insulation layer 2 is greater and which is attached to the bar 4 with rivets 10, a threaded element 7 for adjusting distance between the bar 4 and a window frame 1 1 and is used when mounting is performed from a window mounting side, a nut 8 for capturing a position of the threaded element 7, a bridge 9, on which window and/or door frame 1 1 is rested, and which is attached to a frame 1 1 using covered screws 14. Otherwise, distance between a frame 1 1 and the bar 4 is regulated with the special threaded element 16, projecting into the drilled hole 17 of a window and/or a door frame 1 1 and having a direct access, and allowing to perform installation works in an opening of a wall after the wall has been fitted with an insulation layer, where position of the special threaded element 16 is adjustable with a key 18 through a hole 17 in a frame 1 1 and doesn't change with respect to the bridge 9, but is moving perpendicularly with respect to the bar 4. The special threaded element 16 is fixed with a washer 15.

Projection length of the bar 4 into the zone of insulation layer 2 (Fig. 3) is selected depending on position of a window and/or a door 1 1 in the insulation. Usually, length of the bar 4 depends on a wall 1 thickness, but cannot be longer than 200 mm. In exceptional cases, when the load carrying wall is made of porous structural elements and windows and/or doors 1 1 are extremely heavy, and higher than the usual supporting force is required, the bracket devices can also be made longer. The leg 5 is used in the case of longer projection (Fig. 4). Dimensions of the leg 5 also depend on how far the bracket device is projected into the insulation layer. The leg 5 is attached to the bar 4 with rivets 10. Number of rivets 10 depends on the length of the bar 4 and the leg 5 and the planned loads. The threaded rod 7 is used for adjusting a distance between a window and/or a door frame 1 1 and the bar 4. Length of said threaded rod depends on a project and can range from 30 mm to 300 mm. The rod 7 is secured with nuts 8 on both sides of the bar 4. The bridge 9 is screwed on the rod 7, which said bridge 9 is in direct contact with the frame 1 1. In the first case of using the invention, bridge 9 has two holes through which the frame 11 is securely and firmly attached to the mounting device with cover screws or the like. The rod 7 of the bridge 9 is used to level a window and/or a door and the nut 8 is used for locking its position. If an insulating layer 2 is not yet formed, position of a window and/or a door can be adjusted at any time. In the second case (Fig. 5), where the special threaded element 16 extends beyond the bridge 9 into a window and/or the door frame 1 1 , being mounted in such a way that it's possible to access it, the special threaded element 16 with a direct access to it allow adjustment of a window and/or a door frame position from the inner side of a frame 1 1 during operation of the window and/or a door.

This means that in situations, caused by different reasons (deformations in the construction of a wall, deformations of windows or doors) it is possible to adjust the position of a window and/or a door frame 1 1 with respect to the bar 4. Also, installation can be carried out from inside of a window/door frame 1 1 (the side of a glass pane, if the product is stationary). This is particularly important in projects where structurally the whole wall unit (load carrying wall 1 , insulation layer 2, and ventilated facade 3) is fitted together and there is no possibility to access the mounting side (window / door). The special threaded element 16 is adjusted from the top of the hole 17 in a window and/or door frame 1 1.

Installation speed of a window and/or a door, using the bracket devices, comprises fixing of brackets on to an edge of an opening at individual points for each window, the number of which is provided in the instructions for installation of a window and/or a door (not less than 700 mm between points). Mechanical fasteners may comprise block screws, dowels, bolts and other fasteners used for bracket fastening to an edge of an opening, which depends on a wall type. A window and/or a door are mounted on the secured bracket, wherein the threaded shank is adjusted so as to suit the design conditions. The adjusted position is fixed with nuts.

The bracket device is also suitable to be used even when the load carrying wall is built, and covered with insulation layer: the special threaded element is extending through and above the bridge into the mounted frame of a window so as to access said special threaded element, the bracket device together with the special threaded element allows a window and/or door to be adjusted during their operation. This is particularly important in projects where construction elements of the whole wall unit (load carrying wall, layer of insulation, vent elevation) are being mounted together and there is no possibility to have access to the mounting side (window/door). The special threaded element is regulated from the top, turning it with a special key. Experimental data

According to said fiberglass composite material tests, its dialectic thermal conductivity coefficient is 50 W/(m K) of a metal. Another essential advantage is material's resistance to deformations. Profiles made from this material are free of cracks, have increased resistance to fatigue, impacts, cold and heat.

Exhaustive tests of structural elements manufactured from said reinforced pultruded fiberglass profiles, showed that the material meets requirements of EN 13706-3:2002 standard. Table 1 is provided with design values, and table 2 is provided with nominal values, whereat the values are compared to the required design values.

Table 1

Table 2

Design

Required design

values values as minimum

evaluated

No. Property Unit Test method properties for E23

from tests according to EN

according to 13706

EN 1990

Tension strength-

1 N/mm 2 EN ISO 527-4 240 296

axial, ftn

Tension strength-

2 N/mm 2 EN ISO 527-4 50 51

transverse, f t i

Pin bearing

3 N/mm 2 EN 13706-2, E 150 153

strength-axial, a P n

Pin bearing

4 strength- N/mm 2 EN 13706-2, E 70 144

transverse, σ ρ i

Flexural strength-

5 N/mm 2 EN ISO 14125 240 308

axial, am

Flexural strength-

6 N/mm 2 EN ISO 14125 100 120

transverse, Of i

Interlaminar shear

7 N/mm 2 EN ISO 14130 25 31

strength-axial, τ m Embodiment of the invention

As an example the bracket device for windows and/or doors can be manufactured from Fiberline E23 type material, having thermal conductivity coefficient is in the range from λ=1 W/(m-K) to λ=0,1 W/(m-K), and in particular is λ=0,32 WV(m-K), and mechanical properties meet at least minimal requirements of the E23 type material in accordance with the standards EN 13706 and EN 1990. It should be understood, that the invention is not limited to the fiberglass material, where the bracket can be manufactured using any kind of non-metal composite material, having the same or higher values of characteristics according to said tests.

Our mounting bracket allows installation of products before insulation layer is applied as well as afterwards, or even in a wall made of Styrofoam. Variety of forms of the bracket extends its mounting possibility to any point on an edge of an opening in an insulation layer, allowing for a wider range of visual design solutions. Position of a window and a door in an insulation layer can be planned according to distribution of isotherms and can be mounted in any location therein.

The bracket devices being resistant to cold, corrosion and chemicals also allow three directional adjustment of a window/door position. The device, used as the heavy-duty bracket, has the support leg, resting on the outer wall surface, and the height- adjustable threaded element for an accurate positioning of a window, where said position is fixed by additional threaded elements, e.g. nuts. The device can take different forms and have a variety of additional elements for reinforcement and position adjustment.

The bracket device enables installation of a window in the outer insulation layer of a wall, and eliminates cold bridging in a mounting area of a window and/or a door. Elimination of cold transfer into the edge of an opening is maximized by installing a window and/or a door in an insulation layer of a building. A window and/or a door does not become a cold bridge to the wall installation which results in a higher temperature of the internal structure surfaces in and around the mounting area. This installation method is superior and creates lower thermal losses compared to windows and/or doors being installed in an opening of the load carrying wall, where a layer of insulation is covering a wall from outside.

Also, the structural solution allow for the special threaded element of the bracket to be accessible for adjustments through the inner side of a window and/or a door frame permits installation even when partitions of a wall are completed, i.e. the load carrying wall and insulation thereof are completed. Moreover said structural solution permits installation of integral products (when double glazing is not removable from a window frame). It is very important for installation of windows having a wooden frame, when double glazing cannot be installed into wooden frame window during mounting procedure of said window.