GB2300212A - Window frame reinforcement section - Google Patents
Window frame reinforcement section Download PDFInfo
- Publication number
- GB2300212A GB2300212A GB9508447A GB9508447A GB2300212A GB 2300212 A GB2300212 A GB 2300212A GB 9508447 A GB9508447 A GB 9508447A GB 9508447 A GB9508447 A GB 9508447A GB 2300212 A GB2300212 A GB 2300212A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reinforcement
- section
- window frame
- box
- edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/04—Wing frames not characterised by the manner of movement
- E06B3/06—Single frames
- E06B3/08—Constructions depending on the use of specified materials
- E06B3/20—Constructions depending on the use of specified materials of plastics
- E06B3/22—Hollow frames
- E06B3/221—Hollow frames with the frame member having local reinforcements in some parts of its cross-section or with a filled cavity
- E06B3/222—Hollow frames with the frame member having local reinforcements in some parts of its cross-section or with a filled cavity with internal prefabricated reinforcing section members inserted after manufacturing of the hollow frame
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A reinforcement section for incorporation into a hollow interior of an extruded plastics window frame member is formed from a steel strip having parallel side edges. These are rolled into a box-section and the side edges are interlocked to prevent side-edge spring and to give the reinforcement, and the associated frame member, greater torsional rigidity.
Description
REINFORCEMENT SECTIONS
The invention relates to reinforcement sections for plastics windows.
A window may have both the fixed and movable frames formed from frame members of a plastics material. The members can be extruded and in this case the members will have a hollow interior, often of rectangular cross-section. Such members are not particularly resistant either to longitudinal bending or to torsional stress and so it has been customary to introduce a box-section steel reinforcement into the interior of such a member to increase the strength of the member.
A typical reinforcement is of box-section rolled from a steel strip with parallel side edges that are folded during the rolling process until the edges butt one another. It is a problem with such a conventional reinforcement section that, although the edges of the strip are supposed to butt together when the adjacent surfaces are co-planar, this does not always happen. Sometimes, one edge springs above the other edge. In addition, the reinforcement section, when formed, is not particularly torsionally rigid and this means that the associated member incorporating the reinforcement section is also not particularly torsionally rigid.
According to a first aspect of the invention, there is provided a window frame reinforcement of box-section formed from an elongate metal strip having parallel side edges, the side edges, in the box-section, interlocking with one another.
In this way, the ends are locked together so eliminating end spring problems and making the box torsionally more rigid.
According to a second aspect of the invention, there is provided a method of making a window reinforcement of boxsection from an elongate metal strip comprising rolling said metal strip into said box-section and interlocking said side edges during said forming process.
The following is a more detailed description of an embodiment of the invention, by way of example, reference being made to the accompanying drawing which is a cross-section of a window reinforcement section.
The reinforcement section is formed from a strip of metal such as steel. The strip is initially flat and has parallel side edges 10.
A rolling process forms the strip into a generally boxsection having opposed longer side walls 11 and opposed shorter side walls 12. The side edges 10 interlock with each other at one shorter side wall 12.
To form this interlock, the portions of the strip adjacent the two side edges 10 overlap one another at the shorter side wall 12. One portion forms the outer surface of the wall and continues beyond the end of the wall 12 to overlap the adjacent longer wall 11 which is inwardly indented to accommodate the edge 10. The other portion is folded back on itself for a distance almost equal to the length of the wall and is embraced by the other portion, so that inwardly at the outer surface of the wall there are three layers of the strip.
This provides a firm interlock between the edges of the strip.
This means that there is no tendency for the edges of the strip to move relative to one another and it also allows torsional and other stresses to be transmitted across the join between the edges. This makes the box-section torsionally more rigid than it would be in the absence of the interlock.
It will be appreciated that the drawing shows only one example of an interlock. There are many other interlocks that could be used. The interlock need not be at a shorter side edge; it could be intermediate a longer edge or at any other suitable position. Further, the shape of the section need not be as shown; the section could be any required shape.
In use, the reinforcement section is inserted into a hollow interior of an extruded plastics window frame member. The section is sized to be a tight fit in the interior and provides the member with increased strength, particularly in torsion. In addition, there is no tendency for the edges 10 of the strip to spring apart.
Claims (8)
1. A window frame reinforcement of box-section formed from an elongate metal strip having parallel side edges, the side edges in the box-section interlocking with each other.
2. A reinforcement according to claim 1 wherein the boxsection has opposed longer side walls and opposed shorter side walls, the edges interlocking at one of said shorter side walls.
3. A reinforcement according to claim 2 wherein a portion of the strip adjacent one side edge forms said shorter side wall and extends partially along an adjacent longer side wall and a portion of the strip adjacent the other side edge is folded back on itself and is embraced with said portion adjacent said one side edge.
4. A reinforcement substantially as hereinbefore described with reference to the accompanying drawing.
5. A plastics window frame member having a hollow interior accommodating a reinforcement according to any one of claims 1 to 4.
6. A method of manufacturing a window frame reinforcement comprising forming an elongate metal strip having side edges into a box section and interlocking said side edges during said forming.
7. A method according to claim 5 wherein said box-section is formed by rolling.
8. A method of forming a window frame reinforcement substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9508447A GB2300212B (en) | 1995-04-26 | 1995-04-26 | Reinforcement sections |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9508447A GB2300212B (en) | 1995-04-26 | 1995-04-26 | Reinforcement sections |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9508447D0 GB9508447D0 (en) | 1995-06-14 |
GB2300212A true GB2300212A (en) | 1996-10-30 |
GB2300212B GB2300212B (en) | 1998-08-05 |
Family
ID=10773533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9508447A Expired - Fee Related GB2300212B (en) | 1995-04-26 | 1995-04-26 | Reinforcement sections |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2300212B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19809691A1 (en) * | 1998-03-06 | 1999-09-09 | Niemann | Folded cover strip of a door or window frame |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0092078A2 (en) * | 1982-04-16 | 1983-10-26 | Gebhardt, Manfred | Arrangement for clamping the edges of glass panes, in particular at the construction of greenhouses |
GB2196367A (en) * | 1986-09-02 | 1988-04-27 | Bowater Ind Public Limited Com | Improvements in extrusion profiles |
EP0585531A1 (en) * | 1992-08-18 | 1994-03-09 | Carl Fuhr GmbH & Co. | Doors, windows or the like composed of hollow reinforced plastic section members |
-
1995
- 1995-04-26 GB GB9508447A patent/GB2300212B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0092078A2 (en) * | 1982-04-16 | 1983-10-26 | Gebhardt, Manfred | Arrangement for clamping the edges of glass panes, in particular at the construction of greenhouses |
GB2196367A (en) * | 1986-09-02 | 1988-04-27 | Bowater Ind Public Limited Com | Improvements in extrusion profiles |
EP0585531A1 (en) * | 1992-08-18 | 1994-03-09 | Carl Fuhr GmbH & Co. | Doors, windows or the like composed of hollow reinforced plastic section members |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19809691A1 (en) * | 1998-03-06 | 1999-09-09 | Niemann | Folded cover strip of a door or window frame |
Also Published As
Publication number | Publication date |
---|---|
GB2300212B (en) | 1998-08-05 |
GB9508447D0 (en) | 1995-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20040426 |