WO2002092948A2

WO2002092948A2 - Device for gratings used for windows

Info

Publication number: WO2002092948A2
Application number: PCT/SE2002/000913
Authority: WO
Inventors: Mats BJÖRNTUN
Original assignee: Mim Construction Ab
Priority date: 2001-05-16
Filing date: 2002-05-15
Publication date: 2002-11-21
Also published as: WO2002092948A3; SE0101730L; SE0101730D0; AU2002306520A1

Abstract

The invention relates to an arrangement (1) for a grating (2) for windows and similar openings that it is wished to secure to make entry difficult, which comprises a number of bars (4?4; 53-54¿) extending at an angle (x) in relation to one another, and the resulting grating (2) is capable of attachment to the surrounding frame or similar of the window, etc. In accordance with the invention the bars, which are made of tubes, exhibit a number of connecting parts (7, 8) distributed along their longitudinal extent (10, 11), which exhibit curved form. The aforementioned connecting parts (7, 8) on mutually intersecting bars are flattened and are so arranged as to be connected with one another in pairs. Connection is so arranged as to take place by plaiting, and the ends of the bars exhibit a widened locking part (14). Each of the aforementioned respective locking parts (14) is so arranged as to be capable of accommodation in its own locking accommodation opening in an attachment rail extending along the edge (17) in question of the the grating (2) and capable of attachment to the window frame.

Description

Device for gratings used for windows

The present invention relates to an arrangement for a grating for windows and similar openings that it is wished to secure to make entry difficult, which comprises a number of bars extending at an angle in relation to one another, and the resulting grating is capable of attachment to the surrounding frame or similar of the window, etc.

Previously disclosed gratings that have been used to prevent or, at least, to make it difficult for intruders to gain access through windows into buildings such as apartments, shops, banks, etc., or other private or public buildings after having first smashed the glass in the window have been composite constructions that have been manufactured in factories and then transported to the desired installation site for the grating in question. These prefabricated gratings have been found to take up a lot of space in conjunction with transport to the installation site for the grating in question, and there has accordingly been a requirement for the grating to be transported by means of special vehicles to the installation site for the respective grating . US 1,567,446 A and US 2,139,423 A both relate to two gratings that are made from a homogeneous metal wire with identical cross-sectional form in their longitudinal directions . No flattened ends are thus formed on the respective bars, and they can be used for securing purposes when attaching the assembled grating to suitable edge attachment rails, and in accordance with US 1,567,446 A the grating (6) is formed from "kinked, interwoven wires" and the frame (7) from "a tubular border member therefore, in which the kinked end portions of the wires are received" . The aforementioned grating (6) is manufactured from wires which, with their respective bent ends and a transverse wire (9) , are accommodated (8) in the interior of the aforementioned frame extending through the slotted opening of the frame .

According to US 2,139,423 A, the grating is made of "metal angle bars" namely "warp and weft wires (5)", in conjunction with which "the end of each wire is thereupon spot welded to the inner face of the corresponding flange (11) as indicated at (13)"; see column 2, lines 33-35.

It was also necessary to adapt the dimensions of the prefabricated gratings to the window opening in question, which required a visit to the location of the window in question beforehand to take measurements before manufacture could take place in the factory.

Secure attachment of the gratings has also been difficult to achieve.

The principal object of the present invention is, in the first instance, to solve the aforementioned problems by simple and efficiently functioning means and, among other things, to permit the simple, secure and cost-saving production of such gratings.

The aforementioned object is achieved by means of an arrangement in accordance with the present invention, which is characterized essentially in that the bars are made of tubes with flattened ends with a broadened lock part and with interjacent flattened connecting parts, in that the bars exhibit a number of connecting parts distributed along their longitudinal extent which exhibit curved form, in that all the connecting parts on the respective bar exhibit a common flattened extent, in that the aforementioned connecting parts on mutually intersecting bars are so arranged as to be connected with one another in pairs, in that connection is so arranged as to take place by plaiting, and in that each of the aforementioned respective locking parts is so arranged as to be capable of accommodation in its own locking accommodating opening in an attachment rail extending along the edge in question of the grating and capable of attachment to the window rame . No tubes are shown to have been previously disclosed of a kind which have flattened ends to enable these to form extended locking parts (12-15) , and which can be easily incorporated into suitable attachment rails. The presence of flattened interjacent connecting parts of the aforementioned bars is also not shown, and those which are disclosed are bent in an undulating fashion and with a circular cross-sectional profile. Simple manufacture and assembly are permitted, including in accordance with the present invention. The invention is described below as a number of preferred illustrative embodiments with reference to the accompanying drawings, in which:

Fig. 1 shows a grating produced by means of an arrangement in accordance with the present invention and secured with a lockable attachment rail;

Fig. 2 shows a variant of an attachment rail;

Fig. 3 shows a picture of the actual grating;

Fig. 4 shows a part of the grating with enlargements of the end part and intersecting parts of the grating;

Fig. 5 shows part of a lockable attachment rail;

Fig. 6 shows a part of an attachment rail with associated means of attachment; and

Fig. 7 shows a part of an installed grating and diagrammatically represented parts of attachment rails.

An arrangement 1 for gratings 2 that are intended to be used to secure windows 3 and similar openings through which it is wished to make entry difficult for thieves and other undesirable persons, and which comprise a number of bars 4, 4¹, 4², 4³, 4⁴...; 5, 5¹, 5², 5³, 5⁴... extending at an angle x in relation to one another, which grating 2 is capable of connection to the surrounding frame 6 of the window 3, etc., comprises a number of bars 4-4⁴,- 5-5⁴ that are provided with a number of flattened connecting parts 7, 8. More specifically, the aforementioned bars, which can consist of a metallic material or some other appropriately strong material that is difficult to break apart, and which can also comprise means which make it difficult to cut the bars easily, for example by causing a wire 9 to be introduced inside the respective bar, whereby, when an attempt is made to cut the bar in question, the wire 9 also prevents the bar 4, 5 in question from being cur successfully at the same time. It is also possible to cause one or more solid pins of hard metal, for example a hardened metal, stainless steel, etc., to be introduced internally inside the inner cavity of the tube, and which is/are arranged effectively to obstruct a saw, with which a thief is attempting to saw through the tube in question and the aforementioned bar, i.e. the aforementioned pin/pins will rotate and the saw will be prevented in this way from gripping so that you can saw through the tube and the pin.

The bars 4-4⁴; 5-5⁴ exhibit a number of essentially uniformly distributed connecting parts 7, 8 extending in the longitudinal sense 10, 11 of the respective bar at intended distances A, B from one another and which exhibit curved form. The aforementioned connecting parts 7 , 8 in mutually intersecting bars 4-4⁴; 5-5⁴ are so arranged as to be connected together in pairs, for example by plaiting as clearly illustrated in the lower circle in Fig. 4, essentially at the installation site for the grating.

The ends 4A, 4B; 5A, 5B of the bars also exhibit a widened locking part 12, 13, 14, 15. Each of the aforementioned respective locking parts 12-15 is so arranged as to be capable of being accommodated in its own locking accommodating opening 16; 116 in an attachment rail 18; 118 extending along the edge 17 in question of the grating, which rail is capable of attachment to the window frame 6.

The aforementioned bars are preferably formed from tubes with flattened outer ends 4A, 4B; 5A, 5B and with interjacent connecting parts 7, 8. All the connecting parts 7, 8 in the respective bar 4-4⁴; 5-5⁴ exhibit a common flattening extent, i.e. they extend along a common plane 19. The aforementioned connecting parts 7, 8 are thus so arranged as to extend in alternating directions 20, 21 viewed from the longitudinal median plane 19 of the bar in either direction viewed in the longitudinal sense of the bar. The aforementioned bars are so arranged as to be capable of being assembled easily at the installation site for the grating.

The ends 4A, 4B, 5A, 5B of the bars 4-4⁴; 5-5⁴ are made from formed or cut parts of the ends of the respective bar. In conjunction with this the ends of the tubes are flattened or exhibit at least flattened form and extend conically in a direction towards their respective free ends. The aforementioned tube ends are arranged with their locking parts 12-15 lockable by a common attachment rail 18; 118, which is attached in such a way as to extend along the lateral edges 3A-3D of the respective grating and window opening and are capable of being screwed to the window frame 6, or the wall around the window 3 in question, by means of screws or bolts 22. The rails 18; 118 can also be assembled to form a peripheral frame that is attached jointly to the window frame, etc. Illustrated in Figs. 1 and 5 is a rail 18 which is formed from a square tube, and illustrated in Figs. 2 and 6 is a rail 118 which exhibits U-shaped cross section and is intended to be secured to the window frame 6 with screws 22 from the inside of the space 23 in question to which the window 3 gives access.

The aforementioned rail 18, 118 exhibits a side wall 24; 124 with openings 16; 126 equivalent in number to the grating bars 4, 4¹, 4², 4³, 4⁴, 5, 5¹, 5², 5³, 5⁴, through which openings the bars are so arranged as to extend in a secured locked position L.

An essentially manually actuated locking bar 28 is so arranged as to be capable displacement in an axial direction 26 is capable of being accommodated internally in the tubular rail 24 in its cavity 27. Because the openings 16 in question in the rail 18 exhibit a greater width M than the width W of the bars and their locking parts to enable these to be passed through and into them, the aforementioned locking bar 28 is so arranged as to function as a retaining and securable element for the opening 16 in the rail 18. This is possible because the locking bar exhibits a hollow element 29 directly opposite each opening 16.

The aforementioned locking bar 28 in the illustrated example is capable of manual actuation by means of a laterally projecting actuating arm 31 capable of displacement along a slot-shaped opening 30 in the rail 18.

A locking arrangement, not illustrated in the drawings, is thus essentially provided for the purpose of locking the locking bar 28 securely in the intended locking position so that no thief shall be capable of simply lifting out the grating 3 from the securing rails 18¹, 18², 18³, 18⁴ after first having broken the glass pane 32. The aforementioned locking arrangement thus functions as a conventional lock with a key and a piston.

The rail 118 illustrated in Fig. 2 has its openings 116 only on the side 124, and the width K of the aforementioned opening is less than the aforementioned width W of the bars 4...; 5... and associated lock parts 13-15. The rails 118 are secured by means of bolts 22, which are accommodated by openings 33 (not shown in Fig. 1) to the window frame and the wall in the room in question, etc., on the inside of the window 3.

The grating parts are easy to transport to the installation site, since they only consist of a long and narrow package of installation rails and tubes for the grating and can be cut to length easily at the installation site for the grating.

The grating is also easy to assemble by weaving the bars together in turn, and they fit together readily thanks to the compressed connecting parts 7, 8 on the pipe components. The various parts are readily adapted for length at the site of assembly and installation for the grating, and the aforementioned locking parts 13-15 on the bars, which function as so-called anchors, are formed by cutting the bars at their respective ends. The connecting parts 7, 8 can be produced by cold- forging the bars, which are then hardened. The dimension A, B between the grating bars, i.e. the width of the mesh, can be selected as required, although a suitable dimension is ca. 300-400 mm.

The invention is naturally not restricted to the embodiment described above and illustrated in the drawings. Modifications are possible, in particular with regard to the nature of the various components, or by the application of equivalent technology, without departing from the area of protection afforded to the invention, as defined in the Patent Claims .

Claims

P a t e n t C l a i m s

1. Arrangement (1) for a grating (2) for windows (3) and similar openings that it is wished to secure to make entry difficult, which comprises a number of bars (4-4⁴; 5- 5⁴) extending at an angle (x) in relation to one another, and the resulting grating (2) is capable of attachment to the surrounding frame (6) or similar of the window (3), etc., characterized in that the bars (4-4⁴; 5-5⁴) are made of tubes with flattened ends (4A, 4B; 5A, 5B) with a broadened lock part (12-15) and with interjacent flattened connecting parts (7, 8), in that the bars (4-4⁴; 5-5⁴) exhibit a number of connecting parts (7, 8) distributed along their longitudinal extent (10, 11) which exhibit curved form, in that all the connecting parts (7, 8) on the respective bar (4-4⁴; 5-5⁴) exhibit a common flattened extent, in that the aforementioned connecting parts (7, 8) on mutually intersecting bars (4-4⁴; 5-5⁴) are so arranged as to be connected with one another in pairs, in that connection is so arranged as to take place by plaiting, and in that each of the aforementioned respective locking part (12-15) is so arranged as to be capable of accommodation in its own locking accommodating opening (16; 116) in an attachment rail (18; 118) extending along the edge (17) of the grating (2) in question and capable of attachment to the window frame (6) .

2. Arrangement in accordance with Patent Claim 1, characterized in that the connecting parts (7, 8) are so arranged as to extend in alternating directions (20, 21) viewed from the longitudinal median plane (19) of the bar in either direction viewed in the longitudinal sense (10, 11) of the bar, and in that the bars are so arranged as to be assembled at the installation site for the produced grating.

3. Arrangement in accordance with one or other of the foregoing Patent Claims, characterized in that the lock parts (12-15) of the bars (4-4⁴; 5-5⁴) are made from formed or cut flattened parts of the ends (4A, 4B; 5A, 5B) of the respective bar and extend conically in a direction towards their free ends.

4. Arrangement in accordance with one or other of the foregoing Patent Claims, characterized in that the tube ends (4A, 4B; 5A, 5B) are so arranged as to be lockable by a common attachment rail (18; 118) along the lateral edges (3A- 3D) of the respective grating and are capable of being screwed to a window frame (6), etc.

5. Arrangement in accordance with Patent Claim 4, characterized in that the rail (18, 118) exhibits a side wall (24, 124) with openings through which the aforementioned bars (4, 4¹, 4², 4³, 4⁴, 5, 5¹, 5² , 5³ , 5⁴) are arranged to extend in a locked position (L) , but in that the width of the opening (16; 116) in the locked position (L) is less than the broadened lock end part of the respective bar.

6. Arrangement in accordance with Patent Claim 5, characterized in that a locking bar (28) capable of displacement is accommodated internally in the rail (24) , which bar exhibits a part of an element (29) secured to the respective aforementioned opening (16) .

7. Arrangement in accordance with Patent Claim 6, characterized in that the aforementioned locking bar (28) is capable of manual actuation by means of a projecting actuating arm (31) capable of displacement along a slot- shaped opening (30) .

8. Arrangement in accordance with one or other of the foregoing Patent Claims, characterized in that the bars (4, 5) are so arranged as to accommodate internally a cable (9) , a bar or some other moving and/or elastic part so arranged as to render cutting of or passage through the bars difficult.