AU721941B1 - Improvements to new and existing security screens and doors - Google Patents

Description

TITLE

"Improvements To New and Existing Security Screens and Doors" FIELD OF INVENTION THIS INVENTION relates to improvements to the security screening of new and existing security doors and windows, useful for the function of being both a insect and security screen for windows and doorways alike.

BACKGROUND OF INVENTION Security grilles and screens are often used to protect both business and private premises from unwanted intruders. In general the grilles used range from straight steel bars welded to a steel frame and bolted into a window opening or hinge mounted in a doorway to aluminium extruded frames with a wide variety of aluminium inserts fitted into the extruded frames then fixed or hinged into the opening being protected.

These measures may offer some security, however due to the fact that in most cases the security grille or insert provides ample room to allow access for a bolt cutter or hacksaw to be used inside the inserted area of the security screen to remove the necessary portion of the grille and allow an intruder entry. These types of grilles are mainly used for Industrial or commercial premises where the sometimes unsightly appearance is not an important issue.

In private premises however a combination of insect screening, strong security, general appearance and maintenance is the most important criteria as well as the consideration of cost.

As previously stated, there are various types of security screens and doors that are in use giving only limited protection.

The general type of security screen and security door fitted to the average home comprises of three main parts, the first being the frame an extruded aluminium frame section with a slot on the inside edge of the frame to take the second part the grille insert.

This grille insert is often made from expanded aluminium wide grade mesh or a cast aluminium grille with a variety of ornamental designs.

The third part is the insect mesh generally made from fine fibreglass strands or coated aluminium strands fitted after the security grille is fitted to the frame.

The frame being the most secure part of the entire assembly.

SUMMARY OF THE INVENTION It is an object of the invention to provide an improvement in the manufacturing process of new security screens and doors and the refurbishing of existing security screens and doors to overcome at least one or more of the problems associated as fore mentioned.

Also it will become apparent that the invention will create considerable cost savings in the manufacturing process of new security screens and doors as well as refurbishing of existing security screens and doors in current use.

The invention relates to a method of manufacture and a process of fixing woven stainless steel wire insect resistant security mesh to new and existing security grilles and doors.

According to one aspect of the invention there is provided a woven stainless steel wire insect resistant security mesh screen including, A frame comprising elongate frame members with each having a channel section engaging a respective corner stake in each end thereof, A frame section that has a inside slot or extruded section measuring 14.5mm deep by 7.5mm in width continuous on the internal edge of the said frame, A woven stainless steel wire insect resistant security mesh screen infilling the said frame opening, A woven stainless steel wire insect resistant security mesh screen with folded edges bent at 90 degrees that fits into the internal slot of the said frame, extending along the length of each respective frame member, A Seat section or section preferably that fits inside the said internal slot of the frame, extending along the length of each respective frame member, A Retainer or lock Plate that fits inside the said internal slot of the of the frame, extending along the length of each respective frame member, A plurality of clamping members co-acting with respective fastening means to hold or lock the co-acting clamping members in situate, All said co-acting clamping members extend along the length of a respective frame member, Preferably all of the said frame members have at least three co-acting said clamping members in said internal slot, Frame members may be roll formed or press formed steel lengths or extruded aluminium lengths, Preferably the frame members shall be extruded aluminium lengths, Suitably the said seat or section be of a non-corrosive material compressible with insulating characteristics, Preferably the said seat or section be vinyl or (PVC) Poly-vinyl-chloride possessing the correct compression and insulating characteristics, Suitably the said retainer or lock plate be of a noncorrosive material compressible with insulating characteristics, Preferably the said retainer or lock plate be vinyl or (PVC) Poly-vinyl-chloride possessing suitable hardness to allow fasteners employed to firmly secure the retainer plate to the extruded aluminium frame, Suitably the said mesh be expanded stainless steel mesh or woven stainless steel wire mesh, Preferably the said mesh be woven stainless steel insect resistant security mesh with bent edges perpendicular to the common plane with the perpendicular portions facing toward the inside of the premise being screened, BRIEF DESCRIPTION OF DRAWINGS The invention will now be shown in various views to explain the fixing method employed in more detail, FIG. 1 is a perspective view typical of a security door or security screen, a cross sectional view through A-A, a description of relevant components, FIG. 2 is an isometric view of section A-A of the extruded aluminium frame section with the top of the drawing being the inside of a door or screen, FIG. 3 is cross section A-A as shown in FIG. 1 2 FIG. 4 is an exploded view of FIG. 3 showing the for mentioned internal slot as well as the seat, security wire and retainer plate, also showing a pop rivet fastener locking the retainer plate to the inside edge of the extruded aluminium frame section, FIG. 5 is the retainer or lock plate, FIG. 6 is the woven stainless steel insect resistant mesh showing the :90 degree bend on the edge of the mesh, FIG. 7 is the seat or section FIG. 8 is a exploded view of a comer assembly with all relevant components set out showing the fitment direction as well as the various fasteners employed to fix the frame to corner stake, and the retainer to the frame, FIG. 9 is a view of the inside of the security door or screen showing fasteners only on the inside inner edge, FIG. 10 is a view of the outside of the security door or screen as seen from the outside or public side showing no fasteners at all, only a clean frame with the inserted security screen mesh, DETAILED DESCRIPTION With reference to FIG. 1 there is illustrated a security door or security screen having a frame comprised of elongated members with corner stakes secured by Fasteners, pop rivets or self tapping screws, a woven stainless steel security mesh secured in place by pop rivets or self tapping screws, Page 2/5 shows FIG.2 3 4 a cross section of the extruded aluminium frame and wire assembly shown as section A-A in FIG. 1, FIG. 4 shows the seat 6 sitting inside the frame 1, mesh 2 sitting on the seat 6, the retainer or lock plate 7 pressed in placed in on top of mesh 2 and butting against the inner edge of said mesh 2 as well compressing said mesh 2 against the back perpendicular edge of the seat 6, as well as compressing seat 6 in the horizontal plane, pop rivet 3 securing the frame to the retainer plate 7 securing the entire assembly, performing a reasonable fitment.

As shown in FIG. 4 the assembly of seat 6, mesh 2, retainer 7 inside frame recess 1, provides a firm or transition fit owing to the total thickness of seat 6 mesh 2+ retainer 7 being greater than the extruded section or recess by between 1 to This provides a weather resistant seal around the recess helping to prevent corrosion from occurring, as well in FIG. 4 the mesh 2 does not make contact the recess 1 in the completed fitment.

The stainless steel security mesh shown in FIG. 4 item 2 is precision cut and bent with the retainer plate 7 being used to tension the mesh 2 by butting against the perpendicular portion of the mesh as well as providing compression on the woven mesh surface which inturn compresses into the seat 6 that intur compresses against the bottom of the recess forming a friction lock.

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Claims (1)

1. A security screen or door including: a rigid frame comprising elongate frame members, wherein each frame member comprising a rectangular hollow section and channel section abutting said hollow section, a corner stake engaging respective frame members in each corner. An L shaped seat section inserted into said channel section, a woven stainless steel security mesh with perpendicular bent edges on the periphery of the screen mesh that is inserted onto the seat section with a retainer section being pressed into place on top of the security mesh and abutting the inside perpendicular bent edge of said screen thereby securing the security mesh inside the channel of the outer frame with pop rivets or fasteners being used to effectively hold the retainer to the frame. JNT 0