KR200300409Y1 - Intruder resistant screen - Google Patents

Abstract

The intruder prevention screen has a frame surrounding the intruder prevention mesh. The mesh is supported in the frame by lever clamping between the clamping portion integral with the frame and the clamping member formed separately from the frame. The surface of the clamping portion adjacent to the clamping member has a serrated contour. Adjacent surfaces of the clamping member may also have a serrated contour.

The clamping member and the clamping portion are fixed together by fastening means such as rivets or screws.

Description

Intruder resistant screen {Intruder resistant screen}

The present invention relates to an intruder prevention screen, and is particularly useful for security and insect screening of windows, doorways, and the like.

Screens or gratings are sometimes used to improve the security of buildings. Iron bars, for example, have been used to prevent intruders from entering a building through windows or doors. When used on windows, iron bars are bolted to the wall adjacent to the window. When used in doorways, iron bars are pivotally installed in the doorways and serve as extra doors.

Iron bars are generally considered unsightly and are therefore usually used only for industrial buildings, shops and some businesses. Moreover, the spacing between grate bars is usually wide enough that a bolt cutter or hacksaw can cut the grate bars, so that grate does not always provide adequate security.

One alternative to iron bars is a security screen used to prevent intruders from entering the specimen through windows or doors.

The security screen has an extruded frame and covers a region surrounded by an extruded frame with a wide spacing mesh. Widely spaced metal grids generally have slender members with a mesh gap of approximately 60 mm and a diameter of 7 mm. The mesh is usually inserted into a slot in the frame and not clamped to the frame. One reason for doing this is that meshes of wide spacing metal grids are usually made of elongated aluminum, which is not suitable for bolting due to the small surface area of the mesh in contact with the frame. In addition, the contour of the mesh will require precise and special alignment of the bolt holes for each screen, which is labor intensive. Thus, it is possible for a potential intruder to partially or completely remove the mesh from the frame that is not bolted.

Such security screens also suffer disadvantages, such as disadvantages in grate bars, where the mesh can be cut by bolt cutters or hacksaws.

The screen or grating provides limited security even when the window or door in combination therewith is open to ventilate the interior of the building. However, since such screens or gratings are not effective for blocking insects, screens of fine mesh are sometimes used with security screens or gratings for the purpose of insect screening. Fine mesh is usually installed on a frame made of wood or on a spline of the extruded frame of the screen and rubber strips are used to support the edges of the mesh therein.

The fine mesh screen does not prevent intruders because the frame made of wood is easily broken or the mesh can be easily removed from the spline. In addition, the mesh used is often made of thin nylon or thin metal straps that are susceptible to breakage. Thus, to provide limited security and insect containment, fine mesh screens and security screens are often used together or fine mesh screens and gratings are used, which has the disadvantage of increasing manufacturing and installation costs.

A solution to the problems apparent in the prior art is described in Australian Patent No. 694515, which describes an intruder protection screen that introduces an intruder protection mesh made of woven wire. The inventors have now realized that improvements can be made to strengthen the mesh.

It is an object of the present invention to provide an intruder prevention screen that alleviates at least one of the problems associated with blocking of conventional doorways, windows, and the like.

1 is a perspective view of an intruder prevention screen;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 to explain one embodiment of the present invention; FIG.

3 is an exploded perspective view illustrating how the frame members of FIG. 2 form corners;

4 is a cross-sectional view similar to FIG. 2 illustrating a second embodiment of the present invention; And

5 is a cross-sectional view similar to FIG. 2 illustrating a third embodiment of the present invention.

According to one aspect of the present invention, there is provided a frame formed from elongated frame members, each frame member having a channel portion for receiving a corner stake at each end thereof and a clamping portion away from the receiving portion; An intruder prevention mesh made of woven wire covering the opening surrounded by the frame and positioned on the clamping portions; And a plurality of clamping members for cooperating with respective fastening means to clamp the mesh in a clamped action between the clamping portions and the clamping members. An intruder protection screen is provided having a serrated contour on adjacent surfaces.

Preferably each clamping member may also have a serrated contour on the surface adjacent to the clamping portion.

Suitably the clamping members and the clamping portions extend along the length of each frame member.

The spacing between adjacent wefts or warps of the mesh is suitably no greater than 2.2 mm, preferably in the range of 1 mm to 2.1 mm.

The clamping portion is suitably separated from the channel portion by the wall portion. The wall portion is an appropriately extending portion from one wall of the channel portion.

Suitably there is a lip integral with the channel portion and extending inward from the channel portion. The lip and the wall form a recess with the wall of the channel portion, which recess receives the edge of the clamping member.

Preferably the screen has accommodation means of a cover in which a cover strip is installed, the cover strip being installed in the accommodation means of the cover so that the fixing means are concealed when the screen is viewed from the inside.

The fastening means can be rivets or screws. The screws may be self-tapping or otherwise. As an alternative, the fastening means can be snap fitments.

Suitably the wall hides the fastening means when the screen is viewed from the outside.

BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments are described with reference to the accompanying drawings in order that the present invention may be readily understood and practical.

Referring to FIG. 1, an intruder prevention screen 1 with a frame 2 is illustrated, the frame 2 being inflated with frame members 3 and the intruder prevention clamped to the frame members 3. The mesh 4 is provided.

The mesh 4 covers the opening surrounded by the frame 2. The mesh 4 is a grid woven from stainless steel wire. Suitable mesh dimensions are described in Australian patent 694515. The most suitable dimensions are found to be between 0.8 mm and 1.2 mm in diameter and between 1 mm and 2.2 mm of spacing between the wires (in weft or warp).

2 and 3, an embodiment of the frame members 3 is illustrated. The frame member 3 is formed of extruded aluminum and has a channel section 5 for receiving corner bars 10 at each end. Thus, the frame 2 is made to the desired shape and dimensions by assembling each frame member 3 into appropriate parts and assemble the parts into mitered cornerers. Although the frame members 3 are preferably parts of extruded aluminum, they may be extruded, roll molded or press molded parts of a suitable material.

A clamping member 7 which is formed separately from the clamping portion 6 and the frame member 3 integrally with the channel portion 5 is positioned inside the channel portion 5. The clamping part 6 and the clamping member 7 are the same length and extend along the length of the frame member 3. For accommodating the clamping parts 6 and the clamping members 7 to clamp the mesh 4 to the frame 2 and for receiving a fastening means in the form of a pop-rivet 8 or screw. Holes spaced apart from each other are drilled along the clamping parts 6 and the clamping members 7. Therefore, the area adjacent to each edge of the mesh 4 is clamped to the frame 2 so that when clamped, each clamped area is flush with the rest of the mesh 4 surrounded by the frame 2. . As a result, each edge of the mesh 4 is clamped to only one clamping surface of the clamping portions 6 and each surface of the clamping members 7.

The upper surface of the clamping portion 6 is serrated to support the mesh 4 more strongly. The serrations provide a significant advance over the invention described in the preceding patents by stringing the mesh to clamp the mesh more efficiently. The lower surface of the clamping member 7 may also be serrated, as shown in FIGS. 4 and 5.

A plan in which the wall portion 9 integral with the channel portion 5 extends inward from the channel portion 5, and extends toward the mesh 4 at the free end of the wall portion 9 and supports the clamping portion 6. There is a branch (11).

The lip portion 12 which is integral with the channel portion 5 and extends inwardly from the channel portion, together with the wall portion 9 forms a recess 13 which receives the edge of the clamping member 7 and the edge of the mesh 4. do. The lip 12 is in contact with the clamping member 7 and helps to keep the clamping member 6 and the clamping member 7 in parallel while clamping.

In addition, the clamping member 7 has two slots 14, 15 running parallel along the length of the clamping member 7 to attach the elastic cover strip 16 covering the top of the pop-rivets 8. ).

As shown in FIG. 3, the two frame members 3 are corners of the frame 2 by corner bars 10 inserted into the channel portions 5 of the two frame members 3 mitered together. Are attached to each other. Holes are then drilled into the edges of the frame members 3 and the corner bar 10. The pop-rivets 17 are then inserted to secure the frame members 3 to the corner bar 10.

FIG. 4 shows a second embodiment similar to the first embodiment shown in FIG. 2 but with a toothed shape on the lower side of the clamping member 7 as well.

The upper surface of the clamping portion 6 and the serration on the lower side of the clamping member 7 cooperate to securely hold the mesh 4 into the frame member 3. The fastening means 8 fastens the clamping member 7 in a position opposite to the clamping portion 6, as a result of which the mesh 4 can withstand considerable impact and cannot be pulled out of the frame member.

In FIG. 4, in order to position the clamping member 7 precisely with respect to the frame member 3 and thereby to ensure that the clamping member 7 is also correctly positioned with respect to the clamping part 6, the lip part 12 has a slot 19. The end is formed from a hook (18) to be seated on. The combination of hook and slot helps to provide clamping of the strongly levered mesh 4 by giving the clamping member 7 a pivot point.

A third embodiment in which a tape 20 covering an edge strip of the mesh 4 is added is shown in FIG. 5. The inventors have found that corrosion occurs at the contact points of the stainless steel mesh and the aluminum frame. Strips of plastic tape, such as electrically insulating tape, address this problem.

In use, the intrusion prevention screen 1 can be installed in hinges at the entrance or fixed to the window in a known manner. The mesh 4, which cannot be easily cut with a saw or cut with a bolt cutter because of the mesh to the extent that it provides for the blocking of insects, presents a difficulty for an intruder to obtain an entrance, such as a sufficiently large hole. In addition, when the stainless steel mesh 4 is used, difficulties are added to the potential intruder because of the nature of the stainless steel blunting the cutting tools.

The clamping of the mesh provides additional intruder protection since the wall 9 is located outside the door or window so that the fastening means 8 is concealed from potential intruders. When viewed from the inside, the fastening means 8 is concealed by a cover 16 of a color which matches the clamping member 7.

Although the present invention has been described in terms of preferred embodiments, it should be understood that the present invention is not limited to the specific embodiments described herein.

According to the intruder prevention screen according to the present invention, it is possible to prevent the intruder from entering the building because the mesh can not be easily cut with a saw or cut with a bolt cutter.

Claims (11)

Formed from elongated frame members, each frame member comprising: a frame having a channel portion receiving corner bars at each end thereof and a clamping portion remote from the receiving portion; An intruder prevention mesh made of woven wire covering the opening surrounded by the frame and positioned on the clamping portions; And And a plurality of clamping members for cooperating with respective fastening means to clamp the mesh in a levered clamping action between the clamping portions and the clamping members. And the clamping portions have a serrated contour on a surface adjacent to the clamping members. The method of claim 1, Said clamping members having a serrated contour on a surface adjacent said clamping portions. The method of claim 1, And the clamping portion is supported by the flange portion at one end of the wall portion extending from the channel portion. The method of claim 1, And the clamping members and the clamping portions extend along the length of each frame member. The method of claim 1, And wherein the spacing between adjacent wefts or warps of the mesh is no greater than 2.2 mm. The method of claim 5, An intruder protection screen, characterized in that the spacing between the wefts or warps is in the range of 1 mm to 2.1 mm. The method of claim 1, And wherein the frame members are parts of extruded aluminum. The method of claim 1, And a lip portion integral with the channel portion and extending inwardly from the channel portion. The method of claim 8, The lip and the wall portion together with the wall of the channel portion form a recess, the recess receiving the edge of the clamping member. The method of claim 8, And the lip portion abuts against the clamping member to help keep the clamping portions and the clamping members parallel while clamping. The method of claim 1, The lip portion is intruder prevention screen, characterized in that the hook shape.