GB2299823A

GB2299823A - Security device for windows and doors

Info

Publication number: GB2299823A
Application number: GB9514840A
Authority: GB
Inventors: Peter Kinze
Original assignee: KBE KUNSTSTOFFPROD GmbH
Current assignee: KBE KUNSTSTOFFPROD GmbH
Priority date: 1995-04-05
Filing date: 1995-07-19
Publication date: 1996-10-16
Anticipated expiration: 2015-07-19
Also published as: GB2299823B; DE29505825U1; GB9514840D0

Abstract

A device to increase security against the sash (6) frame being forced open comprises either a security strip (4) attached in the circumferential chamber (K) between the outer frame (5) and the sash frame (6), a web of which produces a tight closure by spanning the chamber (K) and engaging in a groove (51) in the frame when the window or door is in the closed position, or two strips (Figs 5c, 6a and 6b, not shown), one projecting from the outer frame and the other projecting from the inner frame, which overlap in the closed position.

Description

SECURITY DEVICE FOR WINDOWS AND DOORS The invention relates to a security device for windows and doors. More particularly, it relates to a security device for windows and doors which have a outer frame and a sash frame.

Such windows and doors are prone to being forced open by a tool being inserted between the outer frame and the sash frame. In order to increase the security against such windows or doors being forced open, it is known to use strengthened metal fittings, and additional locking devices in connection with said metal fittings.

An object of the invention is to increase the security of windows and doors having a outer frame and a sash frame against being forced open by a tool from being inserted between outer frame and the sash frame.

According to a first aspect of the present invention, there is provided a kit of frame parts for assembling into a outer frame and a sash frame of a window, door or the like in which the sides of the outer frame and sash frame which face one another when the sash frame is closed on the outer frame define between them a chamber, the kit including a security device which comprises a security strip having a web which projects from one of said outer frame and said sash frame of the window, door or the like assembled from the kit such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in a groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping a retaining web of- the security device projecting from the other of said outer frame and said sash frame.

According to a second aspect of the present invention, there is provided a window, door or the like assembled from a kit according to the first aspect of the invention, including a said security device having the web of said security strip projecting from one of said outer frame and said sash frame such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in said groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping said retaining web.

According to a third aspect of the present invention, there is provided a window, door or the like comprising a outer frame and a sash frame, the sides of the frames which face one another when the sash frame is closed on the outer frame defining between them a chamber, the window, door or the like further comprising a security device which comprises a security strip having a web which projects from one of said outer frame and said sash frame such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in a groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping a retaining web of the security device projecting from the other of said outer frame and said sash frame.

In the following description, references to the "security device" are to be construed, in the absence of any statement to the contrary as referring to the security device in the context of its being a component of the kit in accordance with the first aspect of the present invention and in the context of the presence thereof in a window, door or the like in accordance with the second and third aspects of the invention.

Such security device preferably comprises an enclosed profile which is incorporated in the chamber between the outer frame and the sash frame in such a manner that it is concealed and forms an additional safety lock and tight closure for doors, windows and locking sashes of all kinds. The security device can be used in inward-turning and outward-turning, sidehung or top-hung sashes of windows and doors. In such windows and doors, metal fittings in the form of friction hinges, rotary slide bearings and even turn hinges can also be used. Where turn hinges are used, the point of rotation must not be provided such that it is outside the sash frame, but rather such that it is above the cover, in order to guarantee that the sash turns inwards and outwards and that the security strip engages and releases during closing and opening, respectively.

A one-piece security strip may be used for windows and doors which have a profile groove provided in the outer frame, the web of the security strip engaging in the groove when the sash is closed. The security strip may be attached to or pre-formed on a rebate in the sash frame or in the outer frame in a manner such that it is concealed. If the security device is in twopiece form, each part may be attached to or pre-formed on a respective frame.

The security strip may be mounted along the whole length of a frame or along sections thereof, being secured thereto by means of, for example, screws. The security strip may be secured, not to a rebate in the sash frame, but in brace grooves of the sash frame.

When the window or door is in the closed position, the free end of the web of the security strip locks with the opposing side of the adjacent frame, and forms a safety lock and tight closure. This tight closure may take place either by engaging in an appropriate groove or, if there is no such groove, abutting and/or overlapping a protruding retaining web which is pre formed on or attached to the frame profile. In the latter case, the security strip is a two-piece security strip, with one piece being formed on the outer frame and the other piece being formed on the sash frame.

When the window or door is in the closed position, the chamber formed between the two frames is spanned by the respective pieces of the security strip. If an attempt is made to force open the outer frame and the sash frame using a house-breaking tool, the security strip (one-piece or two-piece) offers a considerable resistance and thus increased security against the window or door being forced open.

The security strip may be arranged on the surface of the sash frame rebate and possibly in a stop groove on the sash frame rebate, and secured by means of, for example, screws, or may be secured to the surface of the outer frame rebate. The security strip is preferably located along the hinged side of a frame and preferably along the whole length thereof, in the region between two braces. It may, however, be provided in sections or in one part of the hinged side of the frame.

Thus, at the sides of the sash frame and outer frame which are hinged together, security against unauthorised opening from the outside is substantially increased.

Advantageously, the security strip is T-shaped in cross sect ion, with the T-cross piece being secured to the sash frame or outer frame, for example by means of screws, and the T-web spanning the chamber and producing the tight closure by engaging in a groove and/or abutting a web on the opposing frame.

Where a outer frame profile has a smooth rebate on the inside, a retaining web in the form of a retaining strip may be attached, for example, by means of screws.

Depending on the size of the retaining web, the security strip can likewise be attached to the opposite side of the sash frame in such a way that, together with the retaining web, it bridges, i.e. spans, the chamber space. Two-piece security strips of this type can be used in particular for inward-opening and outward-opening sashes or top-hung sashes of windows or doors.

An additional improvement to the security action may be provided by the security strip having a supporting web, which extends substantially transversely from the web producing the tight closure, in use, in the direction of the outside of the window or door, i.e. such that it is substantially parallel to the sides of the outer frame and the sash frame that face the circumferential chamber. Security strips having this additional supporting web can also be used in outward-opening and inward-opening top-hung sashes and side-hung sashes in connection with the metal fittings already constructed.

The security strip may be stuck or welded to the sash frame. However, it is particularly advantageous if the security strip is pre-formed on the sash frame profile and/or outer frame profile, i.e. for it to be formed during the extrusion of said profiles, so that it forms a unit with the sash-frame profile or outer frame profile.

For a better understanding of the present invention reference will now be made, by way of example only, to the accompanying drawings, in which: Figure 1 is a schematic front view of a window having a side-hung sash and including a security device in accordance with the present invention; Figure 2 is a schematic view from above of the window of Figure 1 showing the sash opened outwards; Figure 3 is a schematic front view of a window having a side-hung sash and an outward-opening, tophung sash and including a security device in accordance with the present invention; Figure 4 is a cross section along the line C-C of Figure 1, showing a outer frame and a sash frame; Figures Sa-c are cross sections along the line A-A of Figure 1, showing a outer frame, a sash frame and alternative security strips in accordance with the present invention;; Figures 6a and b are cross sections along the line A-A of Figure 1, showing a sash frame and a outer frame having an alternative security strip in accordance with the present invention, in different positions; Figures 6c and d are cross sections along the line A-A of Figure 1 showing a outer frame and a sash frame having further alternative security strips in accordance with the present invention; and Figure 7 is a view similar to Figure 5a, showing the sequence of movement of the sash frame relative to the outer frame when the sash is opened and closed.

Figure 1 shows a window 1 having a fixed glazed window portion ib and a side-hung window sash la which can be arranged to open either outwards or inwards.

Window 1 includes a outer frame 5 and a sash frame 6 formed from a kit of frame parts including profiles of, for example, plastics and aluminium. The window sash la is hinged to the outer frame 5 by means of friction hinges 2. In Figure 2, the window sash la is shown in its outwardly-opened position.

It will be appreciated that there are many possible variants in windows and doors. Figure 3 shows, by way of example, one variant which has an outward-opening, side-hung sash la and an outwardopening, top-hung sash lc, which is secured to the outer frame in a manner similar to sash la (not represented in greater detail). All sashes have window handles 3 with espagnolette mechanisms.

In order to increase the resistance against such windows or doors being forced open by tools being inserted into the gap between the outer frame and the sash frame, the kit includes security strips 4 which, in use, are attached to a particularly vulnerable region of the window frame, namely along the hinged sides. These security strips 4 are explained in greater detail below.

Outer frame 5 and sash frame 6, which opens outwards in the direction of arrow P, are shown without a security strip in section in Figure 4. Outer frame 5 is formed of an L-profile (although any suitable profile shape can be used) and sash frame 6 is formed of a T-profile (although any suitable profile shape can be used). In the illustrated example, the outer and sash frames are produced from multi-chambered hollow profiles, which can be produced from plastics material, such as extruded hard PVC, or from aluminium.

The outer frame profile 5 has a wall-connection side 50 having appropriately-formed grooves. On the opposite side, which faces the sash frame, profile 5 has a portion denoted as outer-frame rebate 52 which includes a profile groove 51 near the outside and two rebate webs 52a, b which protrude over the rebate 52.

Profile 5 also has on the outside an abutment projection 53 which has a groove 54 for the accommodation of a seal (not shown).

The sash frame profile 6 has, towards its outer side and on both sides, respective abutment projections 63a, 63b, in which a groove 64a, 64b is formed for the accommodation of a seal (not shown). On the side which faces the outer frames, sash frame 6 has a portion denoted as a sash frame rebate 62, which has a flat stop groove 62a, a protruding web 67 and a mounting groove 66 which is connected to said protruding web and is used for the accommodation of metal fitments. When the window is in the closed position, a chamber K is formed between outer frame 5 and sash frame 6, which chamber is sealed on the outside and on the inside by the seals (not shown).

In the case of profiles which are not stable or where the windows are large, it is possible that someone could lever-in, in the direction of arrow S, between the outer frame and the sash frame using a tool, in order to open the sash frame. This is not desired and is to be prevented.

In order to increase the security of the sash frame against being levered open, a security strip profile 4 is arranged (see Figure 5a) in the chamber K, spanning said chamber from the sash frame to the outer frame. Sash frame 6 and outer frame 5 are further strengthened by means of strengthening profiles 86, 80 inserted into the hollow chambers thereof. Inserted into the abutments 53 and 63a of outer frame and sash frame respectively are seal profiles 81, 82.

In the embodiment illustrated in Figure 5a, the security strip has a T-shaped cross section, with the cross piece 40 resting on the sash frame rebate 62 and engaging in the stop groove 62a and being securely secured thereto by means of, for example, screws 9 (not shown). The T-web 41 spans the distance of the chamber K between outer frame 5 and sash frame 6 and engages in the profile groove 51 of the outer frame when the window is in the closed position. If an attempt is made to push a tool between outer frame 5 and sash frame 6 in the direction of arrow S, the security strip 4 forms a resistance which hinders or prevents the attempt to force open the frame. The security strip 4 is preferably produced from a corrosion-resistant material, such as, for example, aluminium. It is, however, also possible to produce the strip 4 from a suitable solid plastics material, such as hard-PVC.It is also possible to produce the security strip 4 such that it is integral with the sash frame 6, i.e. to preform the security strip directly during extrusion of the sash frame profile. This applies equally to sash frame profiles made of metal. The glazing and further fittings of the window sash la are not represented in Figure 5a. A security strip 4, represented in Figure Sa can, for example, also be used for the top-hung sash lc, according to section B-B of Figure 3.

Figure 7 shows how, when the window sash la is opened by moving the sash frame 6 in the direction of arrow P, the security strip 41 is pulled out of the groove 51 of the outer frame profile, or is engaged in the groove 51 in the case of closing. In Figure 7, seals 81 and 82 are inserted into the appropriate grooves of the outer frame and the sash frame.

Furthermore, a strengthening profile 80, 86 is provided in the outer frame 5 and sash frame 6, respectively, in order to increase the stability of the window.

In Figure 5b, an alternative security strip 4 is shown which includes an additional strengthening and which consequently further increases the resistance against a break-in. The strip 4 shown in Figure 5b is similar to the strip shown in Figure 5a in that the cross piece 40 is secured to the sash frame rebate 62 by means of, for example, screws 9. The projecting Tweb 41 functions as a contact web and seal-type web in order to span the distance between the outer frame and sash frame and fits into a profile groove 51 of the outer frame profile when the window is in the closed position. In addition, a supporting web 42 is preformed on web 41 such that it is substantially parallel to rebate 62 of the sash frame and the cross piece 40, i.e. to the bearing surface of the securing profile, at a certain distance therefrom.Supporting web 42 extends in the direction of the outside of the window sash. Supporting web 42 is preferably sufficiently long that it butts against the inside of the abutment projection 63a of the sash frame. The penetration of a house-breaking tool in the direction of arrow S is substantially decreased by this additional supporting web 42 of the security strip 4.

In Figure 5c, an alternative, two-piece security strip is shown. This includes a T-shaped, security strip 4 which is secured to the rebate 62, 62a of the sash frame 6, and on L-shaped retaining web strip 7, which is secured to the outer frame 5 between the rebate webs 52a, b and has a protruding retaining web 70. The web 41 of the security strip 4 overlaps with and rests against the web 71 of the retaining web strip 7 when the window is in the closed position. The overlap of the respective webs is sufficiently large that security against undesired pushing through is obtained by virtue of mechanical resistance, and that the simple opening and closing of the window by swinging out the sash frame 6 is not hindered.

In Figure 6a, a outer frame is shown, the frame side of which (the side which faces the sash frame) forms a flat outer frame rebate 52 and has no insert groove. A protruding retaining web is formed on the rebate 52 of the outer frame 5 by means of a retaining web strip 7. Retaining web strip 7 is preferably preformed on the profile 5, i.e. is formed during extrusion of the profile. Alternatively, it could be formed separately and secured (by, for example, adhesion) to the frame. Provided on the rebate side 62 of sash frame profile 6 is a security strip 4, which is a simple web and is preferably integrated with the profile, i.e. is pre-formed. Alternatively, it can be constructed as a separate strip and secured (by, for example, adhesion) to the rebate side 62.When the window is in the closed positiOn, the profiled security strip 4 abuts the retaining web strip 7 and forms a tight closure and safety lock.

In the embodiment shown in Figure 6a, the security strip 4 may be T-shaped, as in Figure 5b or 5c. It is also possible to incorporate the security strip 4, particularly if it has a T-shaped cross section, into the brace groove 66 of the sash frame profile. In this case, the retaining web strip 7 is attached to the rebate 52 of the outer frame 5 further towards projection 53, i.e. opposite strip 4, in order to achieve an appropriate tight and retaining closure when the window is in the closed position. The security strip 4 and retaining web strip 7 are provided only at the hinged side of sash frame and outer frame.

Figure 6b shows the manner in which the tight closure between security strip 4 and retaining web strip 7 is opened along the hinged side when the window sash 6 swings outward.

Figure 6c illustrates a further variant of the security strip 4, which is a simple web which is formed, preferably pre-formed, on the sash frame in the region of the rebate 62. The free end 41 of the web is introduced into the profile groove 51 on the outer frame 5 when the window is in the closed position.

Figure 6d illustrates a modification of the security strip of Figure 6c which has an additional supporting web 42 similar to that shown in Figure 5b.

This security strip can be formed during the extrusion process such that it is integrated into the sash frame profile.

As indicated in Figures 1 and 3, the security strip is preferably attached along the most vulnerable side of the window frame, namely the hinged side. It can be provided in both inward-opening and outwardopening window sashes, with the position being determined according to the respective shapes and arrangements of the brace grooves, profile grooves and rebates on the sides of the outer and sash frames which face each other when the window or door is in the mounted position. The security strip, which can be formed such that it is in one piece or two pieces (in which case the counterpart is mounted on the respective other frame), can be produced as a single piece and then secured to the appropriate frame, or can be preformed during the production of the profile.

Claims

CLAIMS:

1. A kit of frame parts for assembling into a outer frame and a sash frame of a window, door or the like in which the sides of the outer frame and sash frame which face one another when the sash frame is closed on the outer frame define between them a chamber, the kit including a security device which comprises a security strip having a web which projects from one of said outer frame and said sash frame of the window, door or the like assembled from the kit such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in a groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping a retaining web of the security device projecting from the other of said outer frame and said sash frame.

2. A kit of frame parts as claimed in claim 1, which includes a rebate in the surface of a sash frame part which surface is to face the outer frame when the sash frame is closed on the outer frame, the security strip being on or for mounting to said rebate.

3. A kit of frame parts as claimed in claim 1, which includes a rebate in the surface of a outer frame part which surface is to face the sash frame when the sash frame is closed on the outer frame, the security strip being on or for mounting to said rebate.

4. A kit of frame parts as claimed in claim 2 or claim 3, wherein the security strip has a T-shaped cross section, the T-cross piece being on or for mounting to the rebate of one of said outer frame and said sash frame parts, and the T-web forming said web.

5. A kit of frame parts as claimed in any one of claims 1 to 4, wherein said security strip is pre formed on a outer frame part or on a sash frame part.

6. A kit of frame parts as claimed in any one of claims 1 to 5, wherein a said retaining web is preformed on a outer frame part or on a sash frame part.

7. A kit of frame parts as claimed in any one of claims 2 to 5, wherein a said retaining web is formed by a separate retaining web strip, which strip is on or for mounting to the rebate of a frame part other than that having the web of the security strip thereon.

8. A kit of frame parts as claimed in any one of claims 1 to 7, wherein the security strip further comprises a supporting web extending substantially transversely from said web.

9. A kit of frame parts substantially as hereinbefore described with reference to Figures 5a, 5b, 5c, 6a & 6b, 6c, 6d and 7 of the accompanying drawings.

10. A window, door or the like assembled from a kit as claimed in any preceding claim, including a said security device having the web of said security strip projecting from one of said outer frame and said sash frame such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in said groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping said retaining web.

11. A window, door or the like comprising a outer frame and a sash frame, the sides of the frames which face one another when the sash frame is closed on the outer frame defining between them a chamber, the window, door or the like further comprising a security device which comprises a security strip having a web which projects from one of said outer frame and said sash frame such that, when the sash frame is closed on the outer frame, the web spans the chamber and forms a tight closure with the other of said outer and said sash frame by releasably engaging in a groove in the other of said outer frame and said sash frame and/or by abutting and/or overlapping a retaining web of the security device projecting from the other of said outer frame and said sash frame.

12. A window, door or the like as claimed in claim 10 or claim 11, wherein the security strip extends along the whole length of the hinged side of said sash frame or said outer frame.

13. A window, door or the like as claimed in claim 10 or claim 11, wherein the security strip extends along sections of the hinged side of said sash frame or said outer frame.

14. A window, door or the like as claimed in claim 11, 12 or 13 having a security strip as defined in any one of claims 2 to 8.

15. A window, door or the like having associated sash and outer frames substantially as hereinbefore described with reference to and as shown in Figures 5a, 5b, 5c, 6a & 6b, 6c, 6d and 7 of the accompanying drawings.

16. A security device as defined in any one of claims 1 and 4 to 8, substantially as hereinbefore described with reference to and as shown in, any one of Figures 5a to 5c, 6a and 6b, 6c, 6d and 7 of the accompanying drawings.