GB2201181A - Window or door frame - Google Patents
Window or door frame Download PDFInfo
- Publication number
- GB2201181A GB2201181A GB08704105A GB8704105A GB2201181A GB 2201181 A GB2201181 A GB 2201181A GB 08704105 A GB08704105 A GB 08704105A GB 8704105 A GB8704105 A GB 8704105A GB 2201181 A GB2201181 A GB 2201181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- insert
- frame
- mounting face
- base
- frame member
- 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.)
- Pending
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
- E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
- E06B3/964—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces
- E06B3/9642—Butt type joints with at least one frame member cut off square; T-shape joints
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Securing Of Glass Panes Or The Like (AREA)
Abstract
A window or door frame made of plastics material comprises two separately formed hollow frame members 10 and 11 which are interconnected substantially at right angles to each other. A rigid insert 13 is mounted in a hollow portion 14 of a first of said frame members 11 and has a base 15 securely attached to a mounting face 16 of a second of the frame members 10, such mounting face being defined between an overhanging lip 17 and an upstanding flange 18. The insert 13 is made of metal and has a tubular portion 20 which is press-fitted into the hollow portion 14 of first frame member 11 to form a rigid coupling therewith; the base 15 is arranged at one end of the tubular portion 20 and has a projecting lip 21 at one end which fits under the overhanging lip 19, and an engaging face 22 which mates with the upstanding flange 23 of the second frame member 10; a projecting portion 24 extends laterally from the tubular portion 20 and has a bore 25 for receiving a fastening screw 26 taken through the second frame member 10 in order to hold-down the base 15 on the mounting face 16; and the engaging face 22 of the insert has cutting means for cutting into the overhanging lip 17 and/or into the upstanding flange 23 as the insert is drawn down onto the mounting face 16 by the fastening screw 26 when there is an unduly tight fit. <IMAGE>
Description
WINDOW OR DOOR FRAME
This invention relates to a window or door frame made of plastics material and comprising separately formed frame members interconnected substantially at right angles to each other, and intended to mount one or more glazed units therebetween.
A window or door frame of this type will be referred to hereinafter as a "frame of the type specified".
In the assembly of a frame of the type specified, it is usual for extruded sections of plastics material to be supplied in standard lengths, and then to be cut-up into required lengths to enable any particular window or door frame design to be assembled. Given that these extruded sections are hollow extrusions, it is known to use an insert which can fit into one of the sections, and which can then be firmly secured to a further section so as to form a secure substantially perpendicular connection between the two sections.Extruded plastics sections for windows and door frames are usually of complex shapes, having, for example, drip channels, inner and/or outer upstands between which glazed panels can be mounted, and profiled grooves into which beads and seals can be mounted, and therefore the insert has to be formed with a shape which conforms with that of the mounting surface of the extruded section which it is intended to engage.
Inserts which are used to date to form the connections in the assembly of a frame of the type specified are moulded in plastics material, and usually comprise a generally rectangular cross-section tubular portion which can be press-fitted into a similarly shaped hollow section of an extruded section, and a generally flat base at one end. of the tubular portion which forms the engagement face which is applied to the mounting face of the extruded section to which a connection is to be made. The base is secured in position by a fastening screw taken through the extruded section and into a plain bore formed in a flange portion of the base which projects laterally beyond the tubular portion.
The plastics inserts are usually mounted via their bases on a substantially flat surface between two upstanding features (such as flanges or upstands) on the extruded section, and are then held-down securely on the flat surface by the fastening screw which is taken through the flange portion. This holds down one end of the base, and the opposite end of the base has a small projecting ledge or shoulder which fits under an overhanging lip (forming one of the upstanding features of the extrusion), so that the insert is firmly held-down in position by the holding-down of each end of the base.
However, it is an inevitable consequence of mass production of extruded sections that small local variations will occur in the quality of the features of the extrusion, and of the transverse distance across the flat mounting surface on which the base of the insert is placed. This can cause the insert to be improperly seated, with a risk of (a) localised over-stressing of the plastics material of the extrusion when the insert has to be forced into a space which is really too small to receive it, so that stress cracks are liable to be generated in the short or long term, or the screw may strip the wall of the plain bore into which it is screwed with consequent loss of securement or (b) the insert is not properly held down by the engagement of the ledge or shoulder under the overhanging lip, so that an insecure connection is obtained with consequent loss of overall stability of the frame.
The present invention has been developed with a view to improving the seating of an insert used to join together securely (in a mutually perpendicular connection) two extruded sections of a frame of the type specified.
According to the invention there is provided a window or door frame made of plastics material and comprising two separately formed hollow frame members interconnected substantially at right angles to each other and intended to mount one or more glazed units therebetween, and a rigid insert mounted in a hollow portion of a first of said frame members and having a base securely attached to a mounting face on a second of said frame members and which is defined between an overhanging lip and an upstanding flange, in which-::
the insert is made of metal and has a tubular portion which is press fitted into said hollow portion of said first section to form a rigid coupling therewith;
the base is arranged at one end of the tubular portion and has a projecting lip at one end which fits under said overhanging lip of said second frame member, and an engaging face which mates with said upstanding flange of said second frame member;
a projecting portion extends laterally from said tubular portion and has a bore for receiving a fastening screw taken through said second frame member in order to hold-down the base of the insert on said mounting face of said second frame member; and
the engaging face of the insert has means for cutting into said upstanding flange as the insert is drawn down onto said mounting face by the fastening screw, in the event of there being an unduly tight fit.
Preferably, the base is slightly arched in a direction away from said mounting face, so as to be capable of bracing-apart said overhanging lip and said upstanding flange as the insert is drawn down onto the mounting face and thereby to form a secure coupling between the first and second frame members.
Conveniently, the first and second frame members are hollow extruded sections of plastics material and particularly of PVC.
According to a further aspect of the invention there is provided a window or door frame made of plastics material and comprising two separately formed hollow frame members interconnected substantially at right angles to each other and intended to mount one or more glazed units therebetween, and a rigid insert mounted in a hollow portion of a first of said frame members and having a base securely attached to a mounting face of a second of said frame members and which mounting face is defined between an overhanging lip and an upstanding flange provided on said second frame member, in which::
the insert is made of metal and has a tubular portion which is press-fitted into said hollow portion of said first frame member to form a rigid coupling therewith;
the base is arranged at one end of the tubular portion and has a projecting lip at one end which fits under said overhanging lip of said second frame member an#d an engaging face which mates with said upstanding flange of said second frame member;
a projecting portion extends laterally from said tubular portion and has a bore for receiving a fastening screw taken through said second frame member in order to hold-down the base of the insert on said mounting face of said second frame member; and
the base is slightly arched in a direction away from said mounting face so as to be capable of bracing apart said overhanging lip and said upstanding flange as the insert is drawn down onto the mounting face, thereby to form a secure coupling between the first and second frame members.
Preferably, in this further aspect of the invention, the engaging face of the insert has means for cutting-into said upstanding flange as the insert is drawn onto said mounting face by the fastening screw, in the event of their being an unduly tight fit.
The cutting means provided on the engaging face may take any suitable arrangement, such as an array of cutting teeth spaced apart along the length of the engaging face.
One embodiment of window or door frame according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawing in which:
Fig. 1 is a diagrammatic illustration of part of a window or door frame made of plastics material to which the invention may be applied;
Fig. 2 is an exploded view of a perpendicular securement between two separately formed frame members, with one of the frame members being shown in section; and
Fig. 3 is a detail view in the direction of the arrow
X in Fig. 2, illustrating a rigid insert used to couple together the two frame members.
Referring first to Fig. 1 of the drawings, there is shown only diagrammatically a typical construction of PVC window or door frame which is assembled from separately formed frame members. By way of example only, the part of the frame illustrated in Fig. 1 may comprise a fixed glazed assembly which may form all-or part of a wall of a building structure. There is shown a lower support rail 10, and a pair of uprights 11 spaced apart along the length of the support rail 10 so as to define a glazing area into which a glazed unit 12 can be mounted in well known manner, the glazed unit comprising a single or double glazed unit as required. The rail section 10 and the upright supports 11 are hollow extrusions of the type used to form fixed, or openable window and door frames.
Fig. 2 illustrates in more detail the manner by which section 10 and one of the uprights 11 can be rigidly secured together substantially at right angles to each other by means of a rigid insert 13 which is mounted in a hollow portion 14 of section 11. The insert 13 has a base plate 15 which can be securely attached to a mounting face 16 of the section 10, the mounting face 16 being substantially flat and defined between two upstanding features provided on the extruded section 10, namely an overhanging lip 17 and an upstanding flange 18 having an inturned lip 19.
The insert 13 is made of metal and has a tubular portion 20 which is press-fitted into the hollow portion 14 of section 11 to form a rigid coupling therewith. The base 15 is arranged at one end of the tubular portion 20 and has a projecting lip 21 at one end which fits under the lip 19, and an engaging face 22 at its other end which mates with an upstanding flange 23 which extends upwardly from the mounting face 16. A projecting portion 24 extends laterally from the tubular portion 20 and has a bore 25 for receiving a fastening screw 26 taken through the section 10 and into the bore 25 in order to hold-down the base 15 of the insert 13 on the mounting face 16.
The engaging face 22 of the insert has means for cutting into the overhanging lip 17 and/or into the upstanding flange 23 as the insert is drawn down onto the mounting face 16 by the fastening screw 26 in the event of there being an unduly tight fit.
As can be seen from Fig. 2, the base 15 is slightly arched in a direction upwardly of the mounting face 16, so as to be capable of bracing apart upstanding flange 18 and 23 (and the respective lips 19 and 17), as the insert 13 is drawn down onto the mounting face 16, so as to form a secure coupling between the sections 10 and 11.
The cutting means on the engaging face 22 may comprise an arrangement of cutting teeth 27, as shown in Fig. 3.
By providing a rigid insert 13 made of metal, it is possible for a very secure coupling joint to be provided in that projecting lip 21 fits snugly under lip 19, and the projecting portion 24 is drawn down into firm seating on the upper faces 28 of the usual moulded profile 29, by secure engagement of the screw 26 which can apply a considerable fastening force. The bore 25 may be tapped, or the screw 26 may be capable of self tapping in the bore 25. In the event of any slight local undersizing of the width of the mounting face 16, the cutting teeth 27 on the insert can cut away any portions of the lip 17 and/or the upstanding flange 23 to allow the base 15 to fit snugly on the mounting face 16.In addition the arch shape of the base 15 enables the insert 13 to be drawn down into a very secure engagement and thereby to move the lip 21 into very firm engagement below the lip 19, and the engaging face 22 to be applied securely against the upstanding flange 23.
In addition, the tubular portion 20 fits as a rigid coupling within the hollow portion 14, so that a very secure perpendicular joint can be provided between the sections 10 and 11.
To further strengthen the coupling between the insert 13, and the section 11, fastening screws may be taken through the side wall of the section 11 and into the tubular portion 20, a hole 30 being shown in Fig. 2 for this purpose-in the insert 13.
The insert 13, as shown in Figs. 2 and 3, has a tubular portion 20 which is generally rectangular, with its major axis extending in the direction of the arrow X i.e.
across the width of the mounting face 16. Evidently, for different internal profiles of the sections 11, there will be corresponding variation in the shape of the tubular portion 20. For example, in one heavy duty upright support, the latter has a rectangular profile having its major axis extending along the length of the rail section 10 i.e. perpendicular to the direction X, in which case the tubular portion 20 will be similarly shaped. In view of this increase in width of the insert 13, in the direction along the length of the rail 10, two lateral projections may be provided, corresponding to projection 24 for dual securement by two fastening screws, and there may also be provision for fastening screws to be taken upwardly through the section 10 and into receiving bores in the base of the insert. This mode of securement is shown in dotted lines in Fig. 2 and designated by reference 31, this comprising a pair of fastening screws spaced apart along the length of the section 10 i.e. perpendicular to the direction of the arrow X.
The inserts 13 may also be used back-to-back, so as to form a cruciform type coupling between a section, such as rail 10, and a pair of supports extending one on either side of the section and in line with each other.
Claims (7)
1. A window or door frame made of plastics material and comprising two separately formed hollow frame members interconnected substantially at right angles to each other and intended to mount one or more glazed units therebetween, and a rigid insert mounted in a hollow portion of a first of said frame members and having a base securely attached to a mounting fa#ce on a second of said frame members and which is defined between an overhanging lip and an upstanding flange, in which::
the insert is made of metal and has a tubular portion which is press fitted into said hollow portion of said first section to form a rigid coupling therewith;
the base is arranged at one end of the tubular portion and has a projecting lip at one end which fits under said overhanging lip of said second frame member, and an engaging face which mates with said upstanding flange of said second frame member;
a projecting portion extends laterally from said tubular portion and has a bore for receiving a fastening screw taken through said second frame member in order to hold-down the base of the insert on said mounting face of said second frame member; and he engaging face of the insert has means for cutting into said upstanding flange as the insert is drawn down onto said mounting face by the fastening screw, in the event of there being an unduly tight fit.
2. A frame according to Claim 1, in which the base of the insert is slightly arched in a direction away from said mounting face, so as to be capable of bracing-apart said overhanging lip and said upstanding flange as the insert is drawn down onto the mounting face and thereby to form a secure coupling between the first and second frame members.
3. A frame according to Claim 1 or 2, in which the first and second frame members are hollow extruded sections of plastics material.
4. A window or door frame made of plastics material and comprising two separately formed hollow frame members interconnected substantially at right angles to each other and intended to mount one or more glazed units therebetween, and a rigid insert mounted in a hollow portion of a first of said frame members and having a base securely attached to a mounting face of a second of said frame members and which mounting face is defined between an overhanging lip and an upstanding flange provided on said second frame member, in which::
the insert is made of metal and has a tubular portion which is press-fitted into said hollow portion of said first frame member to form a rigid coupling therewith;
the base is arranged at one end of the tubular portion and has a projecting lip at one end which fits under said overhanging lip of said second frame member and an engaging face which mates with said upstanding flange of said second frame member;
a projecting portion extends laterally from said tubular portion and has a bore for receiving a fastening screw taken through said second frame member in order to hold-down the base of the insert .on said mounting face of said second frame member; and
the base is slightly arched in a direction away from said mounting face so as to be capable of bracing apart said overhanging lip and said upstanding flange as the insert is drawn down onto the mounting face, thereby to form a secure coupling between the first and second frame members.
5. A frame according to Claim 4, in which the engaging face of the insert has means for cutting-into said upstanding flange as the insert is drawn onto said mounting face by the fastening screw, in the event of there being an unduly tight fit.
6. A frame according to Claim 5, in which the cutting means provided on said engaging face comprises an array of cutting teeth spaced apart along the length of the engaging face.
7. A frame according to Claim 1 or 4 and substantially as hereinbefore described with reference to, and as shown in the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08704105A GB2201181A (en) | 1987-02-21 | 1987-02-21 | Window or door frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08704105A GB2201181A (en) | 1987-02-21 | 1987-02-21 | Window or door frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8704105D0 GB8704105D0 (en) | 1987-03-25 |
| GB2201181A true GB2201181A (en) | 1988-08-24 |
Family
ID=10612719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08704105A Pending GB2201181A (en) | 1987-02-21 | 1987-02-21 | Window or door frame |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2201181A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2245925A (en) * | 1990-07-11 | 1992-01-15 | Scholes Ernest M H | Extruded plastics frame section |
| GB2301135A (en) * | 1995-05-25 | 1996-11-27 | David John Goodman | Plastics window frame joint connection |
| US7987637B2 (en) * | 2006-09-25 | 2011-08-02 | Smith Patrick J | Adjustable shim |
-
1987
- 1987-02-21 GB GB08704105A patent/GB2201181A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2245925A (en) * | 1990-07-11 | 1992-01-15 | Scholes Ernest M H | Extruded plastics frame section |
| GB2245925B (en) * | 1990-07-11 | 1993-11-10 | Scholes Ernest M H | Extruded plastics frame section |
| GB2301135A (en) * | 1995-05-25 | 1996-11-27 | David John Goodman | Plastics window frame joint connection |
| US7987637B2 (en) * | 2006-09-25 | 2011-08-02 | Smith Patrick J | Adjustable shim |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8704105D0 (en) | 1987-03-25 |
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