EP0410927A1 - Multiple glazing - Google Patents

Abstract

A transparent film (8) stretched biaxially to the panes (3) in a composite window is supported directly on the panes (3) via a large number of individual spring elements (1). This results in a relatively simple and easy to manufacture construction.

Description

The invention relates to a composite window with at least one insulating film between two panes, the plane of which is stretched biaxially in two directions parallel to the pane sides, the film edges being connected to sliding elements with sliding elements in the longitudinal direction by means of separate, separate adhesive points which are offset above the film plane the associated disc side are displaceable relative to the discs.

Laminated windows of the type mentioned above are known from CH-PS 653 404. In this known window, the film is stretched out over a frame which, in the untensioned state, is curved after a curve which is continuously curved on one side, for example according to the bending line of a uniformly loaded, non-clamped beam and is stretched to a straight rod by tensioning. In order to be able to stretch a film without wrinkles, a high degree of machining accuracy is required in the production of the curved frame sides, as a result of which the production of the known composite window requires a high level of production expenditure.

The object of the invention is therefore to simplify the “tensioning system” for a film stretched out in a composite window and to reduce the production outlay for such a window.

This object is achieved with the invention in that the sliding elements are supported on the disks via a plurality of tension spring elements.

With the new design, the tenter frame with its precisely machined curved frame sides is no longer required.

Leaf-like springs made of spring band steel, which are supported directly on the disks, have proven useful as tension spring elements, and their tension force can be adjustable by changing their thicknesses and / or their web widths.

Furthermore, it is advantageous for manufacturing if a plurality of sliding elements are combined into a band and / or if a plurality of spring elements are combined into a strip, the bands of the sliding elements, as is known per se from the CH-PS cited at the beginning, between the singular adhesive points are cut alternately from both edges.

• Fig. 1 zeigt in räumlicher, vergrösserter Darstellung einige Spannfederelemente im entspannten Zustand, auf die Gleitelemente aufgesetzt sind:
• Fig. 2 gibt in einem Schnitt II-II von Fig. 3 den Rand des neuen Verbundfensters vergrössert wieder:
• Fig. 3 ist ein Schnitt III-III von Fig. 2, während
• Fig. 4 schliesslich den Schnitt IV-IV von Fig. 2 darstellt.

The invention is explained in more detail below using an exemplary embodiment in conjunction with the drawing.

• 1 shows a spatial, enlarged representation of some tension spring elements in the relaxed state, on which sliding elements are placed:
• FIG. 2 shows the edge of the new composite window enlarged in a section II-II of FIG. 3:
• Fig. 3 is a section III-III of Fig. 2, while
• Fig. 4 finally shows the section IV-IV of Fig. 2.

On a strip of three spring elements 1 (FIG. 1), which are made of spring band steel and are connected to a continuous web 4 serving as a support on the surface 2 of a disk 3, is a band 5 of sliding elements, which is shown in two parts in the example shown 6 postponed. By mutual cuts 7 (Fig. 4) from both edges, the band 5 receives its longitudinal extensibility. The sections of the band 5 located between two incisions 7 from the same edge each form a sliding element 6. On each sliding element 6 there is an adhesion point 9 (FIG. 2) on which there is a transparent film 8 (FIG. 2), for example made of polyethylene terephthalate is attached. In order to achieve a smooth, biaxial tensioning of the film 8, the adhesion points 9 are offset from the plane of the film 8, so that the film 8 is pulled over a bead-like edge 10 of a sliding element 6.

A single spring element 1 has on one side of the web 4, almost perpendicular to it, a frame-like part 11, the free end of which is also angled almost at right angles and serves as a support for the sliding element 6. In addition to the selected material and the thickness of the spring element 1, a variation in the widths of the vertical sides of the "frame" 11 in FIG. 1 can be used to change the spring force of an element 1 within certain limits.

On the other side of the web 4 there is first a ridge-like intermediate piece 12 to which an angle profile 13 connects. While the angle profile 13 - possibly after applying an intermediate layer, not shown, which compensates for different pane thicknesses, for example made of foam - forms the support of the spring element 1 on the pane 3, the ridge-like intermediate piece 12 is a support for a spacer 14 (FIG. 2 ), through which the panes 3 of the composite window are kept at a distance. The spacer 14, which advantageously consists of plastic, contains several chambers 15, which can be filled with a desiccant 16.

To close its interior in a vapor-tight manner, the composite window is enclosed on the outside by an approximately 0.1 mm thick film 17 made of stainless steel, which is connected to the panes 3 by means of an elastic adhesive 18, for example made of polyurethane.

The connection of a spring element 1 with a sliding element 6 or the spacer 14 takes place via elastically deformable tabs 19 or 20 which engage in corresponding cavities 21 or 22 of a sliding element 6 or the spacer 14.

The film 8 is tensioned with the aid of a special tensioning device, in which the tensioning points 9 are first tensioned in one direction and the tensioning points are "set" before the tensioning device is released. This process is then repeated in the direction of the other clamping axis.

The counterforce to the film tension is applied by the elastic spring force of the elements 1, in particular in the transition between the web 4 and the "frame" 11, so that it is not the material elasticity of the film material but the spring elasticity of the elements 1 that is decisive for the elasticity of the tensioning system .

The displaceability of the sliding elements 6 relative to the disks 3 to compensate for different thermal expansions is ensured by the extensibility of the belts 5 and / or by the possibility that the sliding elements 6 can slide on the spring elements 1.

Claims (5)

1. Composite window with at least one insulation film (8) between two panes (3), which is stretched biaxially in its plane in two directions parallel to the pane sides, the film edges also having separate, separate adhesion points (9) offset from one another and offset above the film plane Sliding elements (6) are connected, which are displaceable in the longitudinal direction of the associated pane side relative to the panes (3), characterized in that the sliding elements (6) are supported on the panes (3) by a plurality of tension spring elements (1). 2. Composite window according to claim 1, characterized in that the tension spring elements (1) are leaf-like springs made of spring band steel, which are supported directly on the panes (3). 3. Composite window according to claim 1 or 2, characterized in that the clamping force of the spring elements (1) can be adjusted by changing their thicknesses and / or their web widths (11). 4. Composite window according to one of claims 1 to 3, characterized in that a plurality of sliding elements (6) are combined to form strips (5) which are provided with recesses (7) alternately from the two edges between the adhesion points (9). 5. Composite window according to one of claims 1 to 4, characterized in that several spring elements (1) are combined into strips.

Images