AU688915B2 - Improvements in security door frames - Google Patents

Description

Roguiatiol 3 1

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

r TO BE COMPLETED BY APPLICANT OLYMPIC ALUMINIUM COMPANY PTY. LTD. Name of Applicant: Actual Inventor(s): Address for Service: CALLINAN LAWRIE, 278 High Street, Kew, 3101, Victoria, Australia Invention Title: "IMPROVEMENTS IN SECURITY DOOR FRAMES" The following statement is a full description of this invention, including the best method of performing it known to me:- The present invention relates, in general terms, to a door frame assembly for a security door, and to certain of the components of such assembly, more especially a sucurity door assembly of aluminium or the like material and also to certain components of such assembly, with the assembly exhibiting significant improvements over the known arrangements.

In accordance with the known art security doors of this general type include, as their principal components, an assembly of extrusions which are interconnectable to form a frame, a grille or the like, and furthermore at least one sheet of insect-proof mesh material of any given type and suitable size and shape. Such arrangements have been found to suffer from a disadvantage in terms of there being a tendency for the mesh to in effect roll out or away from S the frame, thereby leaving gaps through which insects and the like can enter, thereby defeating one major purpose for the door itself.

The present invention seeks to overcome the problems and disadvantages *f ~associated with the prior art by providing an improved door frame assembly wherein this tendency for mesh or the like material to separate or roll out is S minimised, if not removed altogether. The door thus produced is more effective, more durable, etc.

.ouoeo In accordance with the present invention, therefore, there is provided a security door assembly including: a first section having a main body portion which is substantially parallelepipedal when viewed in cross-section, said main body portion having extending from one lateral surface thereof, and substantially normally thereto, at least one projecting member, said at least one projecting member being disposed at or in the vicinity of one end of said lateral surface and having a substantially hook-shaped protrusion at the free end thereof, and wherein said main body portion includes, in the vicinity of the other end of said lateral surface. a hook-shaped protrusion forming, with said lateral surface, a substantially C-shaped cavity, said at least one projecting member including a further substantially L-shaped protrusion, spaced from said free end and 211/98msap8312.spe -2aextending substantially normally from said projecting member and providing, with said member, a seating for releasably receiving and retaining a co-operating panel or the like member for said door assembly, wherein said at least one projecting member includes, extending substantially laterally and normally therefrom and spaced from said L-shaped protrusion, a further projecting or protruding member providing, with the lateral surface of said main body portion, a longitudinal cavity adapted, in use, to receive and releasably retain a spline member; and a clip or clamp member, of a substantially elongate shape and having hook-shaped projections at opposed free ends thereof, said clip or clamp member including a flat portion disposed substantially centrally thereof, the arrangement being such that, in use, said first section and said clip or clamp member are interconnected, with a sheet of mesh or the like material interposed therebetween.

f ft:e ft ft ftf ft fti 2/11/98msap8312.spe In accordanco with yat anothera&ct ofhe- pront inntion thro is -pfe4--an improVed- security do or, -mo Up. of a plurality Of on.clamp members of the aforemontionod typ.

In order that the invention may be more clearly understood and put into practical effect reference will now be made to preferred embodiments of a security door frame assembly, and components thereof, in accordance with the present invention. The ensuing description is given by way of non-limitative example only and is with reference to the accompanying drawings, wherein: FIG. 1 is a side elevational view of a first preferred embodiment of a section or extrusion in accordance with the present invention, for use in a frame assembly; FIG. 2 is a side elevational view of a second preferred embodiment of a section or extrusion in accordance with the present invention, for use in a frame assembly; FIG. 3 is a side view of a clamp bar for use with the security door sections as illustrated in FIGS. 1 and 2; FIGS. 4 and 5 are side elevational views of a frame assembly .20 incorporating sections in accordance with the embodiments of FIGS. 1 and 2 respectively; and a clamp bar in accordance with FIG. 3; As illustrated in Figs. 4 and 5 first and second embodiments of an S. assembly in accordance with the present invention include a first extrusion or :2.5 main frame member, generally designated 1, a clamp member generally designated 2, a safety door grille of any given type, at least one layer of a mesh or the like insect-resistant material, as for example fibreglass, and preferably a further layer of a stronger mesh material, whereby to impart increased security to the overall assembly. The overall assembly can be achieved by utilising a plurality of the aforementioned individual components, in conjunction with suitable jointing means such as, for example, pop rivets or the like. The various components making up the assembly can be produced in any suitable manner as for example by extrusion and from any suitable material, preferably aluminium.

-3- 31/7/95as8312.SIt,3 Turning now to Figs. 1 and 2, a first extrusion or main frame member 1, of any suitable length, is constructed preferably of a material such as aluminium or the like, but it should be understood that the actual material of construction is not of the essence of the invention and that any other metallic material, as for example steel or the like, could equally well be employed. In fact, other materials, such as for example plastics material, may also be employed. The main frame member 1 includes a main body portion which is substantially parallelepipedal when viewed in cross-section and, in the especially preferred embodiment as illustrated, for example, in Figure 1, is made up from opposed, substantially vertically disposed members 11, 12 and opposed, respective upper and lower lateral members 13 and 14 extending therebetween. In the alternative embodiment of Fig. 2 the main body portion includes at least two opposed projecting ribs or the like members 15, 16 extending normally therefrom, said ribs or the like members 15, 16 being adapted to provide a seating means for a stiffener or stiffening member (not shown) of any given type, adapted to be disposed within the main body portion, said stiffening member being intended to afford greater rigidity and strength to the overall assembly. In an especially preferred embodiment the stiffening member can take the form of a mild steel extrusion which is itself substantially parallelepipedal in cross-section adapted in -0 use to be disposed in that space formed by upper lateral member 13, members 11 and 12 and the ribs 15, 16.

:'th The main frame member 1 includes, at or in the vicinity of the one end of •the upper or top lateral member 13 thereof, a first arm member 20 extending substantially normally therefrom. The first arm member 20 includes a hookshaped projection 21 at the free end thereof, and also includes a second project;in 22 being spaced substantially inwardly from the first hook-shaped projection 21. These projections 21 and 22 will serve as bearing surfaces for a safety door grille of any given type.

The first arm member 20 also includes a further projection 23, extending oi substantially normally therefrom and being of a substantial L-shape. The further projection 23 is to serve as a seating for a safety door grille 3. The arm member 20 also includes yet another projecting member 24, extending substantially normally therefrom, said another projecting member 24forming, with -4- 31n/95S8312SPE4

-I

the upper or lateral surface 13 of the main frame member 1, a substantially Cshaped cavity 25 for housing a spline or the like member (not shown) of any suitable material, as for example plastics material, intended to assist in retaining a layer of mesh material or the like in place on the door assembly. To assist in such retention, preferably the opposed side surfaces forming said cavity include a plurality of serrations 26 as shown, along at least part of their length.

In the embodiments illustrated the upper lateral member 13 of the main body 1 includes, at or in the vicinity of one end thereof, a projection 30 of a substantial L-shaped which forms, with the lateral surface 13 itself, a substantially C-shaped cavity 31. That same lateral member 13 includes, in the vicinity of the other end thereof, a substantially C-shaped raised position 32 accepted to extend substantially parallel to the projection member 24.

The assembly in accordance with the present invention also includes a clamp or clip member 2 as illustrated, the said clamp or clip member 2 being adapted, in use, to co-operate with the main frame member 1, in conjunction with suitable mesh strips and the aforementioned safety door grille, whereby to result in the creation of the overall door assembly. In the preferred embodiment illustrated the clamp or clip member 2 includes, at one free end thereof, a hookshaped projection 40 adapted, in use, to co-operate with said C-shaped cavity provided at or in the vicinity of the aforementioned upper lateral surface 13 of the main frame member 1, whereby to assist in correct location of the overall assembly. The clamp or clip member 2 also includes, at the other free end S" thereof, a further hook-shaped projection 41 having a plurality of serrations 42 formed on the outer surface thereof. In use, this projection 41 co-operates with the free end of the C-shaped projection 23 of the first arm member 20, with the serrations 42 assisting in securing and holding therebetween a sheet of wire or mesh material of any given type. In the especially preferred embodiment illustrate the clamp or clip member 2 also includes a flat portion 43 which is adapted, in use, to have a pop rivet or the like affixture means disposed therein in any known :a,0 manner, thereby even further ensuring the integrity of the overall assembly.

The principle of operation of the overall assembly is as follows. A grille or the like of any given type is first disposed relative to the arm member 20 and projection 23 of the extrusion 1, with the L-shaped projection 23 acting as a 31ni"95S8312.SII,5 seating therefor. Mesh material of any given type can then be disposed relative to the grille and is adapted to extend into the cavity 25. Preferably a spline material of any given type will be adapted, in use, to be disposed within that cavity 25 whereby to assist in maintenance of the integrity of the mesh and of the tensile load needed to be applied thereto. The clamp member 2 is then located as illustrated relative to the overall assembly and affixed in place as for example by the use of a pop rivet or the like means.

Finally it is to be understood that the aforegoing description refers merely to preferred embodiments of the invention, and that variations and modifications will be possible thereto without departing from the spirit and scope of the invention, the ambit of which is to be determined from the following claims.

*e -6- 31/795oS8312.SPE,6

Claims (7)

1. A security door assembly including: a first section having a main body portion which is substantially parallelepipedal when viewed in cross-section, said main body portion having extending from one lateral surface thereof, and substantially normally thereto, at least one projecting member, said at least one projecting member being disposed at or in the vicinity of one end of said lateral surface and having a substantially hook-shaped protrusion at the free end thereof, and wherein said main body portion includes, in the vicinity of the other end of said lateral surface, a hook-shaped protrusion forming, with said lateral surface, a substantially C-shaped cavity, said at least one projecting member including a further substantially L-shaped protrusion, spaced from said free end and extending substantially normally from said projecting member and providing, with said member, a seating for releasably receiving and retaining a co-operating panel or the like member for said door assembly, wherein said at least one projecting member includes, extending substantially laterally and normally therefrom and spaced from said L-shaped protrusion, a further projecting or protruding member providing, with the lateral surface of said main body portion, a longitudinal cavity adapted, in use, to receive and releasably retain a spline member; and a clip or clamp member, of a substantially elongate shape and '*20 having hook-shaped projections at opposed free ends thereof, said clip or clamp member including a flat portion disposed substantially centrally thereof, the arrangement being such that, in use, said first section and said clip or clamp member are interconnected, with a sheet of mesh or the like material interposed therebetween.

2. The security door assembly as claimed in claim 1, wherein opposed surfaces of said further projecting member and said lateral surface of said main body portion, making up said longitudinal cavity, have a plurality of discontinuities or serrations extending along at least a portion of the length thereof. 2/1/98msap8312.spe

3. The security door assembly as claimed in any one of the preceding claims, wherein said main body portion includes at least one rib extending inwardly from opposed inside surfaces of the longitudinal sides thereof.

4. The security door assembly as claimed in any one of the preceding claims, constructed of a metal.

The security door assembly as claimed in claim 4, wherein said metal is aluminium.

6. The security door assembly as claimed in any one of the preceding claims, formed in an extrusion operation.

7. A security door assembly, substantially as described herein with reference to the accompanying drawings. DATED this 2 nd day of January, 1998. OLYMPIC ALUMIN'.UM COMPANY PTY. LTD. By their Patent Attorneys: CALLINAN LAWRIE •i 2/1/98msap8312.spe ABSTRACT A frame for a security door includes a plurality of sections and associated clamp members which, in turn, co-operate with sheets of mesh (reinforced or otherwise) and suitable retaining means, as for example pop rivets. The section provides a seating for a grille or the like which, in conjunction with one or more layers of mesh, are held in place relative to the overall security door assembly by means of a pop rivet or the like means, together with the interposition of a spline or the like material. The arrangement is such a; i;, use, to prevent unwanted exiting of mesh or like material from its desired position within the door frame. e 31i7/95GS8312.ABS,10 c