AU2018207262B2 - Security system - Google Patents

Abstract

A multi-layered security system having an attack side, the security system comprising a plurality of barriers arranged in a spaced apart relationship with respect to each other, wherein each pair of barriers are located opposite to each other to define another barrier comprising a passage located between the pair of barriers located opposite to each other. The system can additionally comprise security defences such as anti-climb mesh, spike barriers or rollers. The system further comprises a link bar to join together adjacent panels and create barriers. The link bar comprises a means for joining together adjacent panels on both ends and maintaining the panels in a spaced apart relationship. The link bar can also comprise a means for maintaining the panel in an erected condition by securing it to the ground.

Description

Security System TECHNICAL FIELD

[0001 ] The present invention relates to security systems; in particular, to security systems that impede intrusion to a particular restricted area.

[0002] The invention has been devised particularly, although not necessarily solely, in relation to a multi-layered security system to prevent movement and access to a particular area and in particular to modular security systems.

BACKGROUND ART

[0003] The following discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the application.

[0004] Impeding access into restricted areas as well as crowd control is becoming not only popular but a necessity due to security concerns in places where it is expected that a relative large crowd will be gathering to enjoy outdoors a particular entertainment activity (such as a concert) or political rallies. These security systems are typically defined by fencing systems adapted to be assembled for their use at a particular event and disassembled once the event has finished. Fencing systems provide a single layer of defense permitting people to climb the fence or ram against the fence so as to push the fence over due to the little or no strength of these types of fencing systems. Thus, a fence system is no longer an effective security systems for providing security to a multitude of people assembled in a particular area.

[0005] Further, particular security systems have been installed in the cities due to the ongoing security threat of terrorist attacks that may be conducted in public places such as footpaths or pedestrian malls of cities using, for example, vehicles as weapons by driving the vehicles on footpaths or pedestrian malls and into the crowd. However, these current security systems not necessarily have the ability to stop these type of attacks. [0006] For example, currently, security systems have been installed in cities intended to provide security in the public places of the cities. These security systems are based on locating concrete bollards, planter boxes and/or monuments at the points of entry and exit of the footpaths and pedestrian malls to impede access of cars or trucks into these areas that typically are occupied with people. However, these concrete bollards, planter boxes and monuments are arranged in a spaced apart relationship and thus they only impede access of vehicles of a particular size such as cars and trucks; however, access into the restricted areas via relative small cars or motorcycles is still possible.

[0007] Moreover, installation of a barrier using concrete bollards, planter boxes and/or monuments is expensive due to being relative heavy objects difficult to handle; thus, transportation to the particular public places requires large trucks; and once at site, heavy lifting equipment such as cranes is required for arranging the concrete bollards, planter boxes and monuments in the spaced apart arrangement to avoid intrusion of vehicles such as car or vehicles into public places bursting with pedestrians.

[0008] It is against this background that the present invention has been developed.

SUMMARY OF INVENTION

[0009] According to a first aspect of the invention there is provided a multi-layered security system having an attack side, the security system comprising a plurality of barriers arranged in a spaced apart relationship with respect to each other, wherein each pair of barriers being located opposite to each other define another barrier comprising a passage located between the pair of barriers located opposite to each other.

[001 0] Preferably, the plurality of barriers comprise a first barrier and third barrier spaced apart with respect to each other defining a second barrier comprising the passage.

[001 1 ] Preferably, each of the first and third barrier comprises panels arranged side by side

[001 2] Preferably, the security system further comprises at least one spike barrier. [001 3] In particular arrangements, the spike barrier may be located adjacent any one of first, second, and third barriers.

[0014] Preferably, the first barrier defines the attack side of the security system.

[001 5] Preferably, there is provided a spike barrier adjacent the first barrier such that a vehicle impacting the security system drives over the spike barrier prior impacting the first barrier.

[001 6] Preferably, the first barrier comprises a plurality of first panels arranged side by side.

[001 7] Preferably, each first panel comprises a frame member comprising posts and noggins attached to each other and having at least one face covered with anti-climb mesh.

[001 8] Preferably, each first panel comprises an outer face defining the attack side of the security system, and an inner face facing the second barrier.

[001 9] Preferably, the outer face of each first panel is covered with anti-climb mesh.

[0020] Preferably, the third barrier comprises a plurality of second panels arranged side by side.

[0021 ] Preferably, each second panel comprises an inner face facing the first barrier.

[0022] Preferably, each second panel comprises a frame member comprising posts and noggins attached to each other having at least one face covered with a mesh.

[0023] Preferably, the mesh comprises an anti-climb mesh.

[0024] Preferably, the inner face of each first panel facing each second panel is covered with a mesh.

[0025] Preferably, the mesh comprises an anti-climb mesh. [0026] Preferably, the security system further comprises first means for joining together adjacent first panels of the first barrier and second means for joining together adjacent second panels of the third barrier.

[0027] Preferably, the security system further comprises third means for attaching in a spaced apart relationship the first and third barriers.

[0028] Preferably, the security system further comprises a link bar comprising the first means for joining together adjacent first panels, second means for joining together adjacent second panels and third means for attaching in a spaced apart relationship the first and third barriers.

[0029] Preferably, the link bar comprises first and second ends, and a bar joining together the first and second ends to define the third means for attaching in a spaced apart relationship the first and third barriers.

[0030] Preferably, the first end of the link bar comprises the first means for joining together adjacent first panels.

[0031 ] Preferably, the second end of the link bar comprises the second means for joining together adjacent second panels.

[0032] Preferably, the first means for joining together adjacent first panels comprise spigots extending from the first end of the link bar.

[0033] Preferably, the spigots are adapted to releasably receive the lower ends of posts of the adjacent first panels.

[0034] Preferably, the second means for joining together adjacent second panels comprise spigots extending from the second end of the link bar.

[0035] Preferably, the spigots are adapted to releasably receive the lower ends of posts of adjacent second panels.

[0036] Preferably, the upper end of the posts of the adjacent first panels are releasably joined together via first joiners. [0037] Preferably, the upper end of the posts of the adjacent second panels are releasably joined together via second joiners.

[0038] Preferably, the first end of the link bar pivotally attaches the lower ends of adjacent first panels.

[0039] Preferably, the second end of the link bar pivotally attaches the lower ends of the posts of the adjacent second panels.

[0040] Preferably, the first joiners pivotally attach the upper ends of the posts of adjacent first panels.

[0041 ] Preferably, the second joiners pivotally attach the upper ends of the posts of adjacent second panels.

[0042] Preferably, each end of the link bar comprises an opening for receiving a stake to secure the link bar to the ground.

[0043] Preferably, the bar comprises W bars comprising flexible steel.

[0044] In a particular arrangement, the bar of the link bar is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

[0045] Preferably, the link bar comprises a mat resting over the bar of the link bar.

[0046] Preferably, the security system comprises a plurality of link bars arranged in a spaced apart relationship with respect to each other for joining together pairs of first and second panels arranged opposite to each other for defining the security system.

[0047] In an arrangement, the link bar is adapted to provide support to a pair of either neighboring first panels or neighboring second panels.

[0048] Preferably, the first barrier comprises brace members, each brace member extending from a particular location of the posts of the first panels to the bar of a link bar. [0049] Preferably, each link bar is adapted to attach the lower end of the brace member at different locations along the bar of the link bar for varying the inclination of the brace member.

[0050] Preferably, the upper end of each brace member is pivotally attached to a post of the panel.

[0051 ] Preferably, the security system is adapted to upgrade or downgrade the security level that the security system provides.

[0052] Preferably, at least the first panels are adapted to releasably receive security devices to upgrade or downgrade the security level that the security system provides.

[0053] Preferably, at least the first panels are adapted to releasably receive security devices to impede intruders from climbing over at least the first barrier.

[0054] Preferably, the security devices may comprise a razor blade wire assembly attached to support members attached to the upper end of the at least first panels.

[0055] Preferably, the security devices may comprise means to impede intruders from gaining support of parts of the security system during climbing of the at least one one first barrier.

[0056] Preferably, the means to impede intruders from gaining support comprises free-rolling rollers.

[0057] Preferably, each of the at least first panels comprises a pair of rollers.

[0058] Preferably, the rollers are rotatably attached to support members attached to the upper end of the at least first panels.

[0059] Preferably, there is provided a gap defined by the spacing between the upper end of at least the first panels and the rollers, the gap having a specific width to impede intruders from gaining support at the spacing between the roller and upper end during climbing of the barrier. [0060] In an arrangement, there is provided a mesh portion over which the rollers will be located.

[0061 ] Preferably, the security devices may comprise vehicles barriers located adjacent the attack side of the first barrier.

[0062] Preferably, the vehicle barriers comprise modular vehicle barriers releasably attached adjacent the attack side of the barrier to upgrade or downgrade the security level that the barrier provides.

[0063] In another arrangement, there is provided an upper beam joining upper ends of first and second panels.

[0064] Preferably, there are provided a plurality of upper beams arranged in a spaced apart relationship with respect to each other along the security system.

[0065] In yet another arrangement, there is provided a roof structure mounted on the plurality of upper beams covering the passage.

[0066] Preferably, the roof structure comprises at least one spike barrier.

[0067] In a particular arrangement, the first barrier is be tilted forward a particular angle.

[0068] Preferably, the security system further comprises arches located at the upper end of the first and/or second panels.

[0069] In an alternative arrangement, the security system further comprises an assembly of wires extending between posts of first and/or second panels with each wire having a pulley at one of the post; wherein each pulley comprises portions of the wire wound around the axis of the pulley.

[0070] According to a second aspect of the invention there is provided a link bar comprising first means for joining together adjacent first panels, second means for joining together adjacent second panels, and third means for attaching in a spaced apart relationship the first and third barriers for defining the security system in accordance with the first aspect of the invention.

[0071 ] Preferably, the link bar comprises first and second ends, and a bar joining together the first and second ends to define the third means for attaching in a spaced apart relationship the first and third barriers.

[0072] Preferably, the first end of the link bar comprises the first means for joining together adjacent first panels.

[0073] Preferably, the second end of the link bar comprises the second means for joining together adjacent second panels.

[0074] Preferably, the first means for joining together adjacent first panels comprise spigots extending from the first end of the link bar.

[0075] Preferably, the spigots are adapted to releasably receive the lower ends of posts of the adjacent first panels.

[0076] Preferably, the second means for joining together adjacent second panels comprise spigots extending from the second end of the link bar.

[0077] Preferably, the spigots are adapted to releasably receive the lower ends of posts of adjacent second panels.

[0078] Preferably, the upper end of the posts of the adjacent first panels are releasably joined together via first joiners.

[0079] Preferably, the upper end of the posts of the adjacent second panels are releasably joined together via second joiners.

[0080] Preferably, the first end of the link bar pivotally attaches the lower ends of adjacent first panels.

[0081 ] Preferably, the second end of the link bar pivotally attaches the lower ends of the posts of the adjacent second panels. [0082] Preferably, the first joiners pivotally attach the upper ends of the posts of adjacent first panels.

[0083] Preferably, the second joiners pivotally attach the upper ends of the posts of adjacent second panels.

[0084] Preferably, each end of the link bar comprises at least one opening for receiving a stake to secure the link bar to the ground.

[0085] Preferably, the bar comprises W bars comprising flexible steel.

[0086] In a particular arrangement, the bar of the link bar is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

[0087] Preferably, the link bar comprises a mat resting over the bar of the link bar.

[0088] According to a third aspect of the invention there is provided a barrier for installation on a surface and having an attack side, the barrier comprising at least one panel and a plurality of link bars for maintaining the panel in an erected condition, wherein the link bar comprises first and second ends adapted to secure the link bar to the ground and a bar joining together the first and second ends, the first end of each link bar comprising the means for attaching the panel and maintain the panel in erected condition and the second end of each link bar being spaced apart from the first end.

[0089] Preferably, each of the first and second ends of each link bar comprises means to secure the link bar to the ground.

[0090] Preferably, each means to secure the link bar to the ground comprise at least one opening for receiving a stake to secure the link bar to the ground.

[0091 ] Preferably, each panel comprises a frame member comprising posts and noggins attached to each other having at least one face covered with anti-climb mesh.

[0092] Preferably, each panel comprises an outer face defining the attack side of the barrier. [0093] Preferably, the outer face of each first panel is covered with anti-climb mesh.

[0094] According to a fourth aspect of the invention there is provided a barrier for installation on a surface and having an attack side, the barrier comprising a plurality of panels arranged side by side and means for joining together adjacent panels, wherein the means for joining together adjacent panels comprise a plurality of link bars, each link bar comprising first and second ends adapted to secure the link bar to the ground, and a bar joining together the first and second ends, the first end of each link bar comprising means for joining together adjacent panels and the second end being spaced apart from the first end.

[0095] Preferably, each of the first and second ends comprises means to secure the link bar to the ground.

[0096] Preferably, each means to secure the link bar to the ground comprise at least one opening for receiving stakes to secure the link bar to the ground.

[0097] Preferably, the first end of the link bar comprises the first means for joining together adjacent panels.

[0098] Preferably, the first means for joining together adjacent panels comprise spigots extending from the first end of the link bar.

[0099] Preferably, the spigots are adapted to releasably receive the lower ends of posts of adjacent panels.

[001 00] Preferably, the upper end of the posts of the adjacent panels are releasably joined together via joiners.

[001 01 ] Preferably, the first end of the link bar pivotally attaches the lower ends of adjacent panels.

[001 02] Preferably, the joiners pivotally attach the upper ends of the posts of adjacent panels. [001 03] Preferably, each panel comprises a frame member having at least one face covered with anti-climb mesh.

[001 04] Preferably, each panel comprises an outer face defining the attack side of the barrier.

[001 05] Preferably, the outer face of each first panel is covered with anti-climb mesh.

[001 06] Preferably, the bar comprises W bars comprising flexible steel.

[001 07] In a particular arrangement, the bar of the link bar is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

[001 08] Preferably, the link bar comprises a mat resting over the bar of the link bar.

[001 09] Preferably, the barrier comprises brace members, each brace member extending from a particular location of the posts of the first panels to the bar of a link bar.

[001 10] Preferably, each link bar is adapted to attach the lower end of the brace member at different locations along the bar of the link bar for varying the inclination of the brace member.

[001 1 1 ] Preferably, the upper end of each brace member is pivotally attached to a post of the panel.

[001 12] Preferably, the barrier is adapted to upgrade or downgrade the security level that the barrier provides.

[001 13] Preferably, the barrier is adapted to releasably receive security devices to upgrade or downgrade the security level that the barrier provides.

[001 14] Preferably, the barrier is adapted to releasably receive security devices to impede intruders from climbing over the barrier. [001 15] Preferably, the security devices may comprise a razor blade wire assembly attached to support members attached to the upper end of the panels.

[001 16] Preferably, the security devices may comprise means to impede intruders from gaining support of parts of the security system during trying to overcome the plurality of barriers.

[001 17] Preferably, the means to impede intruders from gaining support comprises free-rolling rollers.

[001 18] Preferably, each panel comprises a pair of rollers.

[001 19] Preferably, the rollers are rotatably attached to support members attached to the upper end of the panels.

[001 20] Preferably, there is provided a gap defined by the spacing between the upper end of the panels and the rollers, the gap having a specific width to impede intruders from gaining support at the spacing between the roller and upper end during climbing of the barrier.

[001 21 ] In an arrangement, there is provided a mesh portion over which the rollers will be located.

[001 22] Preferably, the security devices may comprise vehicles barriers located adjacent the attack side of the barrier.

[001 23] Preferably, the vehicle barriers comprise modular vehicle barriers releasably attached adjacent the attack side of the barrier to upgrade or downgrade the security level that the barrier provides.

BRIEF DESCRIPTION OF THE DRAWINGS

[001 24] Further features of the present invention are more fully described in the following description of several non-limiting embodiments thereof. This description is included solely for the purposes of exemplifying the present invention. It should not be understood as a restriction on the broad summary, disclosure or description of the invention as set out above. The description will be made with reference to the accompanying drawings in which:

Figure 1 is a top view of a particular arrangement of a security system in accordance with a first embodiment of the invention;

Figure 2 is a front view of a first panel of the security system shown in figure 1 ; Figure 3 is a side view of the first panel of the security system shown in figure 1 ;

Figure 4 is a front view of a second panel of the security system shown in figure

1 ;

Figure 5 is a side view of the second panel of the security system shown in figure

1 ;

Figure 6 is a front view of a link bar of the security system shown in figure 5;

Figure 7 is a top view of the link bar of the security system shown in figure 1 ;

Figure 8 is a side view of the link bar of the security system shown in figure 1 ;

Figure 8a is a side view of a stake for securing the link bar to the ground;

Figure 9 is a cross-sectional view of the security system along line 9-9' shown in figure 1 ;

Figure 10 is a front view of a section of the security system shown in figure 1 comprising the adjacent first panels;

Figure 1 1 a is a front view of an upper joiner for joining adjacent panels of the first barrier of the security system shown in figure 1 ;

Figure 1 1 b is a front view of an upper joiner for joining adjacent panels of the second barrier of the security system of the security system shown in figure 1 ; Figure 12 is a top view of a particular section of the security system shown in figure 1 at an inflection point;

Figure 13 is a top view of one end of the link bar shown in figures 6 to 8;

Figure 14 is a cross-sectional view of another arrangement of a security system in accordance with the first embodiment of the invention;

Figures 15 is side view of an end of a link bar of the security system shown in figure 14;

Figure 16 is a detail of a side view of an alternative arrangement of the security system shown in figure 14;

Figure 17 is a side view of a brace member for reinforcing the barriers of the security system shown in figure 1 ;

Figure 18 is a front view of a particular panel including an entrance to provide access to the passage defined between the barriers of the security system shown in figure 1 ;

Figure 19 is a top view of a particular arrangement of a security system in accordance with a second embodiment of the invention;

Figure 20 is a cross-sectional view of the security system along line 20-20' shown in figure 19; and

Figure 21 is a cross-sectional view of another arrangement of a security system in accordance with the second embodiment of the invention.

[001 25] It should be noted that the figures are schematic only and the location and disposition of the components can vary according to the particular arrangements of the embodiments of the present invention as well as of the particular applications of the present invention. DESCRIPTION OF EMBODIMENT(S)

[001 26] Figure 1 shows a particular arrangement of a security system 10 in accordance with a first embodiment of the invention. Figure 19 shows a particular arrangement of a security system 10 in accordance with a second embodiment of the invention.

[001 27] The system 10 is adapted to impede intruders on foot from accessing a restricted area bound at least partially by the security system 10. In particular, the security system 1 0 comprises a multitude of barriers 12 configured to hinder any intruders on foot from overcoming the security system 10. The security system 10 is also adapted to impede any type of vehicles from accessing the restricted area in the event the vehicles may ram into the security system.

[001 28] The system 10 permits incorporation of a plurality of security devices 58 and/or 60 (see figures 20 and 21 ) with the intention to adjust the level of security that the security system 1 0 can provide; this is particular useful in view that it is possible to, for example, upgrade or downgrade the level of security of the security system 10 depending on the particular security threat at a particular location where the security system 1 0 is installed.

[001 29] As will be described below, the security system 1 0 permits attachment at particular locations of the barrier 12 of security devices 58 such as rollers 46 for impeding intruders from using the upper end of the panels 14 and 16 as support for climbing the barrier 12; alternatively, the barrier 12 may be fitted with razor blade wire assemblies at, for example, the upper end of the panels 14 and 1 6.

[001 30] In an arrangement, the upper end of the panels 14 ( and panel 16) are adapted to releasably receive the security devices 58 permitting, as mentioned before, upgrading or downgrading the level of security of the barrier 12. For example, if the security system 10 is to be used for controlling attendees of outdoor music festivals, the rollers 46 may be used for impeding the attendees to use the upper end of the panels 14 as support to climb the barrier 12 with the intention to access the festival.

[001 31 ] Alternatively, razor blade wire assemblies may be installed onto the upper end of the panels 14 (and panel 16) in situations where greater security threats exist when compared to the security threats posted by the attendees of outdoor music festivals.

[001 32] Further, the security system 12 may incorporate security devices 60 that impede, for example, vehicles from ramming against the barrier 12 of the security system 10. As will be described below, vehicles barriers such as spikes barriers or modular bollards such as bollards adapted to be selectively displaced between an operative condition and a retracted condition may be part of the security system 10.

[001 33] The fact that the security system 10 comprises a multitude of barriers 12, is particularly advantageous because it permits the security system 10 to provide multiple layers of defense by using security devices 58 or 60 with the intention to gradually mitigate the attack as the intruder is overcoming each layer. In particular, as the intrusion progresses, the attacking power of the intruder is gradually reduced resulting in that the intrusion is slowed down until it is halted or turned back.

[001 34] The system 1 0 shown in figure 1 comprises a multitude of barriers 12 located in a spaced arrangement with respect to each other. In the arrangement shown in figure 1 , there is a first barrier 1 2a and a third barrier 12c spaced apart with respect to each other defining a second barrier 12b. The barrier 12a and 12c may be fence-like structures arranged opposite to each other defining a passage between the barriers 12a and 12c.

[001 35] In alternative arrangements, there may be provided additional layers of defense. For example, vehicle barriers 60 (such as spike barriers or modular bollards) may located in front of the first barrier 12a defining the attack side of the security system 10. In the event of an attack by a vehicle, the spike barriers act as a first layer of defense puncturing the tyres of the vehicle prior or during the vehicle impacting the first barrier 12a; the modular bollards can stop the vehicles.

[001 36] Further, other additional layers of defense to be incorporated in the security system 10 may be systems to impede personnel on foot to use the barriers as support for gaining access to the restricted area. As will be described later herein, the system 10 comprises layers of defense comprising anti-climb meshes as well as free-rolling rollers 46 impeding intruders on foot to climb any barriers 1 2 of the security system 10 by getting hold of any possible support structure being part of the security system 10. Razor blade wire assemblies may also incorporated as an additional layer of defense.

[001 37] Moreover, in accordance with the first and second embodiment of the invention, security systems 10 comprises a plurality of components adapted to be transported to the particular areas that require protection such as areas where entertainment activities like outdoor concerts or rallies will be held. At site, the components may be assembled relatively fast for erection of the security system 10. Once assembled, the security system 1 0 provides a fully interconnected single structure that may be moved or tilted only with the help of heavy lifting equipment; thus, a multitude of individuals or one or more vehicles ramping against the security system 10 will not be able to move or tilt the security system 10.

[001 38] As mentioned before, the particular arrangement of security system 10 shown in the figures 1 to 18 comprises a first barrier 12a and a third barrier 1 2c spaced apart with respect to each other defining a second barrier 12b.

[001 39] As shown in figure 1 , each of the barriers 12a and 12c comprises, respectively, a plurality of panels 14 and 16. The panels 14 and 16 are arranged side by side to define, respectively, the barriers 12a and 12c.

[00140] Figure 2 shows the front of the panel 14a of the first barrier 12a. The panels 14 are typically located at the attack side of the security system 1 0.

[00141 ] Any panel 14 comprises a frame 18 defined by two spaced part posts 20 and three breams 22 extending between the posts 20 for joining the posts 20 together. The three beams 22 (also referred as noggins) are arranged in a spaced apart arrangement with respect to each other defining to neighboring voids 26a and 26b in the frame 18.

[00142] Further, the frame 18 is covered with anti-climb mesh 26 so as to define a surface adapted to hinder intruders on foot from climbing the panel 14 with the objective of overcoming the barrier 12a. (For illustration purposes figure 2 shows only particular portions of the frame 28 covered with anti-climb mesh 26; however, the mesh 26 covers the entire frame 18 of the panel 14). The mesh 26 is attached to the outer face of the panel 14 - the outer face is the face that defines the attack side of the security system 10. The attack side of the security system is the side where it is expected that the intruders will impact first.

[00143] Figure 4 shows the front side panel 16a of the third barrier 12c. The panels 16 are typically located behind a first barrier 12a. This third barrier 12c acts as an additional layer of defense. In alternative arrangements, more than two barriers 12 may be arranged in a tandem and spaced apart relationship.

[00144] The panel 1 6 comprises a frame 18 defined by two posts 20 spaced apart with respect to each other, and two beams 22 extending between the posts 20 for joining the post 20 together. The two beams 22 are arranged in a spaced apart arrangement with respect to each other defining one void 26 within the frame 1 8

[00145] Further, the frame 18 is covered with mesh 28 defining a fence-like structure impeding access to the restricted area. (For illustration purposes, figure 4 shows only particular portions of the frame 28 covered with mesh 28; however, the mesh 28 covers the entire frame 18 of the panel 16).

[00146] In a particular arrangement, the mesh 28 of the panels 16 may also comprise anti-climb mesh. The inner face (the face facing the first barrier 12a) comprises the mesh 28.

[00147] As mentioned before, the panels 14 are arranged sided by side defining the barrier 12a; and, the panels 16 are arranged side by side defining the barrier 1 2c. The barriers 12a and 12c are attached via link bars 30 so as to arrange the barriers 12a and 12c opposite to each other defining a second barrier 12b located between the first and third barriers 12a and 1 c. The second barrier 12b defines a passage 13 that, as will be explained below, permits security officers to patrol the security systems 10.

[00148] As shown in figure 1 , the link bars 30 are adapted to attach (1 ) pairs of panels 14 that are adjacent each other, (2) pairs of panels 16 that are adjacent each other and (3) pairs of panels 14 and 1 6 located opposite to each other.

[00149] Attachment of the panels 14 and 16 as described above occurs because the link bars 30 comprises two ends 32a and 32b that permit attaching the lower ends of the posts 20 of the panels 14 and 16. In particular, one end 32a of the link bar 30 attaches the lower end of posts 20 of neighboring panels 14 and another end 32b of the link bar 30 attaches the lower end of posts 20 of neighboring panels 16. The ends 32a and 32b due to being spaced apart permit arranging the panels 14 and 16 opposite to each other defining the passage 13 as is shown on figures 9 and 14.

[001 50] Figures 6 to 8 show a particular arrangement of the link bar 30.

[001 51 ] As shown in figure 6, the link bar 30 comprises the first end 32a and the second end 32b and that are spaced apart with respect to each other via a bar 34. The bar 34 permits arranging the panels 14 and 16 opposite to each other.

[001 52] The link bar 30 is adapted to be secured to the terrain on which the security system 10 rests. For this, each end 32 comprises openings 31 to permit stakes 33 to traverse the ends 32 and penetrate the ground. The use of stakes 33 is particularly useful when using the security system 10 on surfaces comprising grass.

[001 53] The link bar 30 also comprises a pair of plates 35 extending upwardly from the bar 34 of the link bar 30 and spaced apart with respect to each other. The plate 35 comprises openings 37 arranged in a spaced apart relationship with respect to each other. As will be described later with reference to figure 9, the plates 35 permits receiving between them the lower end of a brace member 38.

[001 54] Further, in one arrangement, the bar 34 comprises one or more W bars 39 as shown in figure 8. The W bars 39 comprise flexible steel to allow adjusting the link bar 30 to any irregularities present on the ground. The W bars also remove the trip hazard when security officers are patrolling the passage 13.

[001 55] Moreover, each end 32 comprises spigots 36 extending upwardly for receiving the lower ends of the post 20. Each end 32 comprises two neighboring spigots 36 that permit releasably attaching the lower ends of the posts 20 of the panels 14 adjacent to each other as well as of the panels 16 adjacent to each other to define, respectively, the barriers 12a and 12c.

[001 56] The joint of the lower ends of the posts 20 with the spigots 36 is adapted to permit pivotal movement of the posts around the pin 36. As will be described later, this pivotal movement permits varying the trajectory of the security system 10 so as to for example define a security system 10 having a S-shaped configuration as shown in figure 1.

[001 57] Further, the upper ends of the posts 20 of neighboring panels 14 or 16 are also releasably attached to each other; as shown in figures 10 and 1 1 a and 1 1 b, attachment occurs via a joiner 42 comprising neighboring spigots 44 for insertion into the upper ends of the poles 20. These joiners 42 are also adapted to permit releasable attachment and pivotal movement of the panels 14 or 16 as described above in relation to the joint of the lower end of the posts 20 and the pin 36 of the link bar 30.

[001 58] Moreover, the link bars 30 may also be used as an additional defense layer. For example, as shown in figure 1 , there are two link bars 30a and 30b having only one of its ends 32 attached to a panel 14 (or 16). This arrangement provides additional reinforcement to neighboring panels 14 (or 16) that are attached to each other via one of the ends 32 of the link bar 30.

[001 59] Referring now to figure 9, figure 9 shows a cross section of the security system 1 0 along the line 9-9' shown in figure 1 .

[001 60] As mentioned before the barrier 12a in the particular arrangement shown in figure 1 defines the attack side of the security system 10a. The attack side is the side of the security system 1 0 that receives the initial assaults. Thus, this particular barrier 12a requires reinforcement means so as to absorb as much energy as possible from the intruder's impact during the initial assault. By doing this, the intruder will be slowed down and most probably stopped at any subsequent layer of defense - for example: the passage 13 (the second layer 12b - also referred as the second barrier 12b) or the third layer 12c (also referred as the third barrier 12c).

[001 61 ] As shown in figure 9, each panel 12 of the barrier 12a comprises a brace member 38 to provide additional reinforcement to the barrier 1 2a against impact. In a particular arrangement, there is a brace member 38 for each post 20 of each panel 4 of the barrier 12a.

[001 62] The brace 38 as shown in figures 9 and 17 comprises a rod 40 extending diagonally from a particular location (such as an upper location) of the post 20 to a particular location at the bar 34 of the link bar 30. The angle of inclination of the rod 40 may for example depend on the particular uses that the security system 10 will be given. The angle of inclination of the brace 38 may be adjusted by attaching the lower end of the rod 40 to particular openings 37 of the plates 35. The upper end of the rod comprises a link 41 permitting attachment of the brace member 38 to the post 20 of the panel 14. The link 41 is adapted to pivotally attach the upper end of the brace member 38 so as to permit varying the angle of inclination of the brace member 38.

[001 63] Moreover, it was mentioned before that the security system 10 in accordance with the first embodiment of the invention comprise means to impede intruders from gaining support from parts of the security system 10 while trying to overcome the plurality of layers of defense.

[001 64] In a particular arrangement, the security system may comprise free-rolling rollers impeding the intruders on foot to overcome the barrier 12a by getting hold of the upper end of the panels 12 in case the intruders successfully were able to climb the panel 12.

[001 65] Figure 1 0 shows the front section of the barrier 12a comprising a roller arrangement 46 attached to the upper end of the panels 1 .

[001 66] The roller arrangement 46 comprises a plurality of cylinders 48 arranged side by side on the panels 14. In particular, each panel comprises a pair of rollers 48a and 48b. The rollers 48 are rotatably attached to support members attached to the upper end of the panels 14.

[001 67] The rollers 48 are attached in a vertical manner on the upper end of the panels 14. There is a gap of 10 mm between each roller and the upper end of the panels 14 to remove a gripping joint. This arrangement allows for strength to the roller apparatus and additional height to the panel 14.

[001 68] In a particular arrangement, there may be provided a mesh portion over which the rollers 48 will be located. This mesh portion impedes an intruder gaining access to the rollers 48 or the inner side of the panels 12 and thus, adding a further layer of defense. [001 69] Furthermore, the panels 14 are adapted to be attached to each other to follow a particular trajectory depending on the particular area that the security system 10 will provide protection to.

[001 70] As shown in figure 1 , the barriers 12a and 12c are arranged so as to define an S-shaped trajectory. In other arrangements, the barriers 12a and 12c may be arranged in a straight line, curved line, or a circular arrangement to fully surround a restricted area. This is accomplished via a joints adapted to pivotally attach the posts 20 of neighboring panels 14 (or 16). As mentioned before, (1 ) the lower end of the posts 20 of the neighboring panels 14 (or neighboring panels 16) are pivotally attached to the spigots 36 of the link bar 30, and (2) the upper ends of the post 20 of the neighboring panels 14 (or neighboring panels 16) are joined together via joiners 42 adapted to permit pivotal movement of the neighboring panels 14 (or neighboring panels 16).

[001 71 ] The pivotal movement of the panels 12 or 16 allow for the arrangement of the barriers 12a and 1 c not only to follow a straight line; but, the barriers 1 2a and 12c may undergo, as is shown in figure 1 , 12 and 13 a change of direction by orienting the panels 14 (or 16) at angles other than 1 80°.

[001 72] Referring now to figures 14 to 16, figures 14 to 1 6 show particular views of an alternative arrangement of the security system 1 0 according to the first embodiment of the invention. The security system 1 0 according to this alternative arrangement comprises features that are similar to the security system 10 according to the first arrangement of barriers 12a and 12c shown in figures 1 to 13 and similar reference numerals are used to identify similar parts.

[001 73] The security system 10 in accordance with the alternative arrangement comprises a link bar 30 adapted to account for any irregularities of the terrain on which the security system 10 is mounted; for this the link bar 30 comprises a bar 34 that is elevated when compared to the bar 34 of the link bar 30 of the first arrangement of the security system 10 described earlier and shown in figure 6.

[001 74] As shown in figures 14 and 15, the ends 32 of the link bar 34 comprise plates 52 extending from the ends 32 upwardly for receiving the link bar 34. In this manner, the bar 34 of the link bar 30 is spaced apart a particular distance from the ground 37 on which the security system 10 rests defining a clearance 35 - see figure 15. This particular arrangement of link bar 30 accounts for any irregularities (such as rocks protruding upwardly from the ground 37) due to the presence clearance 35 between (a) the ground 37 on which the link bar 30 rests and (b) the bar 34. To include one or more of these particular arrangements of link bar 30 in the security system is particular useful for use when the security system 10 is installed on irregular terrain.

[001 75] There may be provided a mat 54 for covering the bar 34 shown in figure 14. The mat 54 provides a flat surface with the objective of reducing the trip hazard created by the elevated bar 34 of the link bar 30 described in the earlier paragraph. Also, the mat 34, due to resting on the link bar 30, can enhance the stability of the security system 10; this is particularly true in the particular circumstances where the mat 56 is relative heavy.

[001 76] Further, as also shown in figure 14, there is provided an upper beam 54 joining the upper ends of the panels 14 and 16 of the barriers 12a and 12c. In particular arrangements there may be provided a plurality of upper beams 54 arranged in a spaced apart relationship with respect to each other along security system 10.

[001 77] This particular arrangement of upper beams 54 keeps together the barriers 12a and 12c.

[001 78] Further, in a particular arrangement of the previously described security systems 10, the first barrier 12a may be tilted forward a particular angle as is shown in figure 1 6 in connection with the alternative arrangement of the security system 10. Tilting the panel 14 of the barrier 12a increases the difficulty for an intruder to climb the barrier 12.

[001 79] Further, other alternative arrangements of the security system 10 may comprise arches located at the upper end of, for example, the panels 14. The arches are arranged in such a manner that one side of the arch (the haunch of the arch) is attached to the upper end of the panels 14 or 16 and the other side of the arch is suspended spaced apart from the upper end of the panel 14 or 16. In this manner the concave surface of the arch is facing towards the surface on which the security system 10 is mounted. The presence of the arch increases the difficulty for an intruder to climb the barriers 12 due to having to overcome the arch one reaching the upper end of the panels 14 or 16. [001 80] Further, other alternative arrangements of the security system 1 0 may include, instead or in conjunction with the anti-climb meshes 26, an assembly of wires extending between the posts 20 of the panels 14 or 16 with a pulley at one post for each wire.

[001 81 ] The pulley comprises portions of the wire wound around the axis of the pulley. This arrangement impedes the intruders from gaining support when trying to start climbing the panels 14 or 1 6 by grabbing the wires; this is because when a pulling force is applied to the wire, the pulley will be actioned resulting in that the wire will extend and thus not providing a viable support for climbing the panel 14 or 16.

[001 82] In operation, once the security system 1 0 has been installed, the security system 1 0 impedes intruders on foot or in vehicles to enter the restricted areas bound by the security system 1 0.

[001 83] As mentioned before, the system 1 0 comprises a multitude of layers of defense with the intention that each attack is gradually mitigated as the intruders overcome each of the defense layers; and, as the intrusion progresses, the resources of the intruders are reduced and consumed; this results in that intrusion is slowed down until it is halted or turned back.

[001 84] In particular, the security system 1 0 shown in figure 1 comprises a plurality of barriers 1 2 that provide layers of defense for gradually reducing the action of intruders trying to gain access to the restricted area bound by the security system 12. For example, the security system 1 0 shown in figures comprises a first barrier 12a defining one or more layers of defense with intention to mitigate as much as possible the action of the intruders. In the circumstances where the intruder is able to overcome the first barrier 12a by for example successfully climbing the panels 1 4, the intruder enters into the passage 1 3. The passage 13 acts as another layer of defense allowing the security officers to patrol the security system 10 by walking along the passage 1 3. This allows controlling any intruder that has overcome the first barrier 1 2a. Authorised access to the passage 1 3 is accomplished by the use of secured entrances such as doors 50 (see figure 18) placed at regular intervals for permitting entrance of security officers into the passage 1 3 as well for removing any intruder that may have been able to enter the passage 13. [001 85] The third barrier 12c is adapted to impede the intruder from exiting the passage 13 by climbing the barrier 12c defined by the panels 16 - for example, the barrier 12c may also comprise layers of defense such as anti-climb mesh or arches.

[001 86] Thus, the security system 10 in accordance with the first embodiment of the invention provides a multi-layered barrier to impede access of intruders on foot or using motorised vehicles into restricted areas bounded by the security system 10.

[001 87] Figures 19 to 21 show a particular arrangement of a security system 10 according to a second embodiment of the invention. The security system 10 according to the second embodiment is similar to the security system 10 according to the first embodiment and similar reference numerals are used to identify similar parts.

[001 88] The system 10 in accordance with the second embodiment of the invention comprises a barrier 12 configured to hinder any intruders on foot from overcoming the security system 10. The security system 10 is also adapted to impede any type of vehicles from accessing the restricted area in the event the vehicles may ram into the security system.

[001 89] The security system 10 according to a second embodiment of the invention comprises one or more panels 14 to define the barrier 12.

[001 90] In the particular arrangement shown in figures 19 to 21 , each panel 14 comprises a panel 14 as described with reference to the first embodiment of the invention comprising a frame 18 covered with anti-climb mesh 26 for impeding intruders from climbing the panels 14 to try to overcome the barrier 12.

[001 91 ] In the present arrangement, the panels 14 are attached to each other to define the barrier 12. In particular, adjacent panels 14 (such as panels 14a and 14b shown in figure 19) are releasably and pivotally attached to each other via one of the ends 32b of the link bars 30. The other ends 32a, located at the other end of the bars 34 of the link bars 30, are spaced apart from the ends 32b.

[001 92] As was described with reference to the first embodiment of the invention, each link bar 30 is adapted to be secured to the terrain on which the security system 10 rests. For this, each end 32 of the link bar 30 comprises openings 31 to permit stakes 33 to traverse the ends 32 and penetrate the ground - see figures 20 and 21 . The use of stakes 33 is particularly useful when using the security system 10 on surfaces comprising grass.

[001 93] In alternative arrangements, the link bars 30 may be attached to the ground by bracing them with concrete weighted footings.

[001 94] Further, the link bars 30 rest on the ground on which the barrier is installed. The fact that each link bar 30 comprises a bar 34 extending away from the barrier 12 provides support to the barrier 12 impeding tilting of the barrier 12 by intruders pushing against the panels 14 defining the attack side of the barrier 12. The fact that each link bar 30 is attached to ground (for example, via stakes 33) aids in impeding intruders from moving and tilting the barrier 12. Spike barriers 60 may be located on the roof structure.

[001 95] The particular arrangement of barrier 12 shown in figure 19 comprises the first arrangement of link bar 30 described with reference to figure 9 related to the first embodiment of the invention. Alternative arrangements of the barrier 12 according to a second embodiment of the invention may comprise the second arrangement of link bar 30 described with reference to figure 14 related to the first embodiment of the invention.

[001 96] The barrier 12 according to the second embodiment of the invention is particular useful in particular situations where not enough space is available for installing the multilayered barrier 12 in accordance with the first embodiment of the invention; for example, the barrier 1 2 according to the second embodiment of the invention is particularly advantageous for surrounding constructions site to impede access to the site of non-authorised personnel or intruders.

[001 97] Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.

[001 98] Further, it should be appreciated that the scope of the invention is not limited to the scope of the embodiments disclosed. For example, in alternative arrangement, the security system 10 may comprise a roof type structure for protecting the second barrier 12b (the passage 13). The roof structure may be supported on the beams 54 that join the upper end of barriers 12a and 12b. [001 99] Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

Claims (110)

1. A multi-layered security system having an attack side, the security system comprising a plurality of barriers arranged in a spaced apart relationship with respect to each other, wherein each pair of barriers are located opposite to each other to define another barrier comprising a passage located between the pair of barriers located opposite to each other.

2. A multi-layered security system according to claim 1 wherein the plurality of barriers comprise a first barrier and third barrier spaced apart with respect to each other defining a second barrier comprising the passage.

3. A multi-layered security system according to claim 2 wherein each of the first and third barrier comprises panels arranged side by side.

4. A multi-layered security system according to any one of the preceding claims wherein the security system further comprises at least one spike barrier.

5. A multi-layered security system according to claim 4 wherein the spike barrier is located adjacent any one of first, second, and third barriers

6. A multi-layered security system according to any one of claims 2 to 5 wherein the first barrier defines the attack side of the security system.

7. A multi-layered security system according to claim 6 wherein a spike barrier is located adjacent the first barrier.

8. A multi-layered security system according to any one of claims 2 to 7 wherein the first barrier comprises a plurality of first panels arranged side by side.

9. A multi-layered security system according to claim 8 wherein each first panel comprises a frame member comprising posts and noggins attached to each other and at least one face covered with anti-climb mesh.

10. A multi-layered security system according to claims 8 or 9 wherein each panel comprises an outer face defining the attack side of the security system, and an inner face facing the second barrier.

1 1. A multi-layered security system according to claim 10 wherein the outer face of each first panel is covered with anti-climb mesh.

12. A multi-layered security system according to any one of claims 2 to 1 1 wherein the third barrier comprises a plurality of second panels arranged side by side.

13. A multi-layered security system according to claim 12 wherein each second panel comprises an inner face facing the first barrier.

14. A multi-layered security system according to claims 12 or 13 wherein each second panel comprises a frame member comprising posts and noggins attached to each other and at least one face covered with a mesh.

15. A multi-layered security system according to claim 14 wherein the mesh comprises an anti-climb mesh.

16. A multi-layered security system according to any one of claims 10 to 14 wherein the inner face of each first panel facing each second panel is covered with a mesh.

17. A multi-layered security system according to claim 16 wherein the mesh comprises an anti-climb mesh.

18. A multi-layered security system according to any one of claims 8 to 17 wherein the security system further comprises first means for joining together adjacent first panels of the first barrier and second means for joining together adjacent second panels of the third barrier.

19. A multi-layered security system according to claim 1 8 wherein the security system further comprises third means for attaching the first and third barriers in a spaced apart relationship with respect to other.

20. A multi-layered security system according to claims 18 or 19 wherein the security system further comprises a link bar comprising the first means for joining together adjacent first panels for defining the first barrier, second means for joining together adjacent second panels for defining the second barrier, and third means for attaching the first and third barriers in a spaced apart relationship opposite to each other.

21. A multi-layered security system according to claim 20 wherein the link bar comprises first and second ends, and a bar joining together the first and second ends to define the third means for attaching in a spaced apart relationship the first and third barriers.

22. A multi-layered security system according to claim 21 wherein the first end of the link bar comprises the first means for joining together adjacent first panels.

23. A multi-layered security system according to claims 21 or 22 wherein the second end of the link bar comprises the second means for joining together adjacent second panels.

24. A multi-layered security system according to claims 22 or 23 wherein the first means for joining together adjacent first panels comprise spigots extending from the first end of the link bar.

25. A multi-layered security system according to claim 24 wherein the spigots are adapted to releasably receive the lower ends of posts of the adjacent first panels.

26. A multi-layered security system according to any one of claims 18 to 25 wherein the second means for joining together adjacent second panels comprise spigots extending from the second end of the link bar.

27. A multi-layered security system according to claim 26 wherein the spigots are adapted to releasably receive the lower ends of the posts of adjacent second panels.

28. A multi-layered security system according to any one of claims 25 to 27 wherein the upper end of the posts of the adjacent first panels are releasably joined together via first joiners.

29. A multi-layered security system according to any one of claims 27 or 28 wherein the upper end of the posts of the adjacent second panels are releasably joined together via second joiners.

30. A multi-layered security system according to any one of claims 27 to 29 wherein the first end of the link bar pivotally attaches the lower ends of the posts of adjacent first panels.

31 . A multi-layered security system according to any one of claims 28 to 30 wherein the second end of the link bar pivotally attaches the lower ends of the posts of the adjacent second panels.

32. A multi-layered security system according to any one of claims 28 to 31 wherein the first joiners pivotally attach upper ends of the posts of adjacent first panels.

33. A multi-layered security system according to any one of claims 29 to 32 wherein the second joiners pivotally attach upper ends of the posts of adjacent second panels.

34. A multi-layered security system according to any one of claims 21 to 33 wherein each first and second end of the link bar comprises at least one opening for receiving a stake to secure the link bar to the ground.

35. A multi-layered security system according to any one of claims 21 to 34 wherein the bar joining together the first and second ends of the link bar comprises W bars comprising flexible steel.

36. A multi-layered security system according to any one of claims 21 to 35 wherein the bar joining together the first and second ends of the link bar is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

37. A multi-layered security system according to claim 36 wherein the link bar comprises a mat resting over the bar of the link bar.

38. A multi-layered security system according to any one of claims 12 to 37 wherein the security system comprises a plurality of link bars arranged in a spaced apart relationship with respect to each other for joining together pairs of first and second panels defining the first and third barriers arranged opposite to each other.

39. A multi-layered security system according to any one of claims 8 to 37 wherein the link bar is adapted to provide support to adjacent first panels

40. A multi-layered security system according to any one of claims 1 1 to 39 wherein the link bar is adapted to provide support to adjacent second panels

41 . A multi-layered security system according to any one of claims 8 to 40 wherein the first barrier comprises a plurality of brace members, the brace members extending from a particular location of the posts of the first panels to the bars joining together adjacent first panels defining the first barrier.

42. A multi-layered security system according to claim 41 wherein each link bar is adapted to attach the lower end of the brace member at different locations along the bar of the link bar for varying the inclination of the brace member.

43. A multi-layered security system according to claims 41 or 42 wherein the upper end of each brace member is pivotally attached to a post of the first panel.

44. A multi-layered security system according to any one of the preceding claims wherein the security system is adapted to upgrade or downgrade the security level that the security system provides.

45. A multi-layered security system according to claim 44 wherein at least the first panels are adapted to releasably receive security devices to upgrade or downgrade the security level that the barrier provides.

46. A multi-layered security system according to claim 45 wherein at least the first panels are adapted to releasably receive security devices to impede intruders from climbing over at least the first barrier.

47. A multi-layered security system according to claim 46 wherein the security devices comprises a razor blade wire assembly attached to support members attached to the upper end of the at least first panels.

48. A multi-layered security system according to claim 46 wherein the security devices comprise means to impede intruders from gaining support of parts of the security system during climbing of the at least one first barrier.

49. A multi-layered security system according to claim 48 wherein the means to impede intruders from gaining support comprises free-rolling rollers.

50. A multi-layered security system according to claim 49 wherein each of the at least the first panel comprises a pair of rollers.

51 . A multi-layered security system according to claim 50 wherein the rollers are rotatably attached to support members attached to the upper end of the at least the first panels.

52. A multi-layered security system according to any one of claims 49 to 51 wherein there is provided a gap defined by the spacing between the upper end of at least the first panels and the rollers, the gap having a specific width to impede intruders from gaining support at the spacing between the rollers and the upper end of the first panel during climbing of the first barrier.

53. A multi-layered security system according to any one of claims 49 to 52 further comprising a mesh portion over which the rollers will be located.

54. A multi-layered security system according to any one of the preceding claims wherein the security devices comprise vehicles barriers located adjacent the attack side of the first barrier.

55. A multi-layered security system according to claim 54 wherein the vehicle barriers comprise modular vehicle barriers releasably attached adjacent the attack side of the barrier to upgrade or downgrade the security level that the security system provides.

56. A multi-layered security system according to any one of the preceding claims wherein there is provided plurality of upper beams joining upper ends of the first and third barriers, the upper beams begin arranged in a spaced apart relationship with respect to each other along the security system.

57. A multi-layered security system according to claim 56 further comprising a roof structure mounted on the plurality of upper beams covering the passage.

58. A multi-layered security system according to claim 57 wherein the roof structure comprises at least one spike barrier.

59. A multi-layered security system according to any one of the preceding claims wherein the first barrier is be tilted a particular angle.

60. A multi-layered security system according to any one of the preceding claims further comprising arches located at the upper end of the first and/or second barriers.

61 . A multi-layered security system according to any one of claims 12 to 60 further comprising assembly of wires extending between posts of first and/or second panels with each wire having a pulley at one of the post; wherein each pulley comprises portions of the wire wound around the axis of the pulley.

62. A link bar comprising first means for joining together adjacent first panels to define the first barrier, second means for joining together adjacent second panels to define the second barrier, and third means for attaching in a spaced apart relationship the first and third barriers for defining the security system in accordance with any one of claims 1 to 18.

63. A link bar according to claim 62 wherein the link bar comprises first and second ends, and a bar joining together the first and second ends to define the third means for attaching in a spaced apart relationship the first and third barriers.

64. A link bar according to claim 63 wherein the first end of the link bar comprises the first means for joining together adjacent first panels.

65. A link bar according to claims 63 or 64 wherein the second end of the link bar comprises the second means for joining together adjacent second panels.

66. A link bar according to claims 64 or 65 wherein the first means for joining together adjacent first panels comprise spigots extending from the first end of the link bar.

67. A link bar according to claim 66 wherein the spigots are adapted to releasably receive the lower ends of the posts of the adjacent first panels.

68. A link bar according to any one of claims 65 to 67 wherein the second means for joining together adjacent second panels comprise spigots extending from the second end of the link bar.

69. A link bar according to claim 68 wherein the spigots are adapted to releasably receive the lower ends of posts of adjacent second panels.

70. A link bar according to any one of claims 64 to 69 wherein the first end of the link bar pivotally attaches the lower ends of the posts of the adjacent first panels.

71 . A link bar according to any one of claims 65 to 70 wherein the second end of the link bar pivotally attaches the lower ends of the posts of the adjacent second panels.

72. A link bar according to any one of claims 63 to 71 wherein each end of the link bar comprises at least one opening for receiving a stake to secure the link bar to the ground.

73. A link bar according to any one of claims 63 to 72 wherein the bar joining together the first and second ends comprises W bars comprising flexible steel.

74. A link bar according to any one of claims 63 to 73 wherein the bar joining together the first and second ends is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

75. A link bar according to claim 74 wherein the link bar comprises a mat resting over the bar of the link bar.

76. A barrier for installation on a surface and having an attack side, the barrier comprising at least one panel and a plurality of link bars for maintaining the panel in an erected condition, wherein the link bar comprises first and second ends adapted to secure the link bar to the ground and a bar joining together the first and second ends, the first end of each link bar comprising means for attaching the panel and maintain the panel in an erected condition and the second end of each link bar being spaced apart from the first end.

77. A barrier according to claim 76 wherein each of the first and second ends of each link bar comprises means to secure the link bar to the ground.

78. A barrier according to claim 77 wherein each means to secure the link bar to the ground comprise at least one opening for receiving a stake to secure the link bar to the ground.

79. A barrier according to any one of claims 76 to 78 wherein each panel comprises a frame member comprising a plurality of posts and noggins and having at least one face covered with anti-climb mesh.

80. A barrier according to claim 79 wherein the panel comprises an outer face defining the attack side of the barrier.

81. A barrier according to claim 80 wherein the outer face of the panel is covered with anti-climb mesh.

82. A barrier for installation on a surface and having an attack side, the barrier comprising a plurality of panels arranged side by side and means for joining together adjacent panels, wherein the means for joining together adjacent panels comprise a plurality of link bars, each link bar comprising first and second ends adapted to secure the link bar to the ground, and a bar joining together the first and second ends, the first end of each link bar comprising means for joining together adjacent panels and the second end being spaced apart from the first end.

83. A barrier according to claim 82 wherein each of the first and second ends comprises means to secure the link bar to the ground.

84. A barrier according to claim 83 wherein each means to secure the link bar to the ground comprise at least one opening for receiving stakes to secure the link bar to the ground.

85. A barrier according to any one of claims 82 to 84 wherein the first end of the link bar comprises the means for joining together adjacent panels.

86. A barrier according to any one of claims 82 to 85 wherein the means for joining together adjacent panels comprise spigots extending from the first end of the link bar.

87. A barrier according to any one of claims 82 to 86 wherein each panel comprises a frame member comprising a plurality of posts and noggins having at least one face covered with anti-climb mesh.

88. A barrier according to claims 86 or 87 wherein the spigots are adapted to releasably receive the lower ends of posts of adjacent panels.

89. A barrier according to any one of claims 82 to 88 wherein the upper end of the posts of the adjacent panels are releasably joined together via joiners.

90. A barrier according to any one of claims 82 to 89 wherein the first end of the link bar pivotally attaches the lower ends of adjacent panels.

91 . A barrier according to claims 88 or 90 wherein the joiners pivotally attach the upper ends of the posts of adjacent panels.

92. A barrier according to claim 91 wherein each panel comprises an outer face defining the attack side of the barrier.

93. A barrier according to claim 92 wherein the outer face of each first panel is covered with anti-climb mesh.

94. A barrier according to any one of claims 82 to 93 wherein bar joining together joining together the first and second ends of the link bar comprises W bars comprising flexible steel.

95. A barrier according to any one of claims 82 to 94 wherein the bar joining together the first and second ends of the link bar is located at an elevated position defining a clearance between the surface on which the link bar rests and the bar.

96. A barrier according to claim 95 wherein the link bar comprises a mat resting over the bar of the link bar.

97. A barrier according to any one of claims 82 to 96 wherein the barrier comprises a plurality of brace members, each brace member extending from a particular location of the posts of the panels to the bars of the link bars.

98. A barrier according to claim 97 wherein each link bar is adapted to attach the lower end of the brace member at different locations along the bar of the link bar for varying the inclination of the brace member.

99. A barrier according to claims 97 or 98 wherein the upper end of each brace member is pivotally attached to a post of the panel.

100. A barrier according to any one of claims 82 to 99 wherein the barrier is adapted to upgrade or downgrade the security level that the barrier provides.

101 . A barrier according to claim 100 wherein the barrier is adapted to releasably receive security devices to upgrade or downgrade the security level that the barrier provides.

102. A barrier according to claim 101 wherein the barrier is adapted to releasably receive security devices to impede intruders from climbing over the barrier.

103. A barrier according to claim 1 02 wherein the security devices comprise a razor blade wire assembly attached to support members attached to the upper end of the panels.

104. A barrier according to claim 102 wherein the security devices comprise means to impede intruders from gaining support of parts of the security system during trying to overcome the plurality of barriers.

105. A barrier according to claim 104 wherein the means to impede intruders from gaining support comprises free-rolling rollers.

106. A barrier according to claim 1 05 wherein each panel comprises a pair of rollers.

107. A barrier according to claim 106 wherein the rollers are rotatably attached to support members attached to the upper end of the panels.

108. A barrier according to any one of claims 104 to 1 07 wherein there is provided a gap defined by the spacing between the upper end of the panels and the rollers, the gap having a specific width to impede intruders from gaining support at the spacing between the roller and upper end during climbing of the barrier.

109. A barrier according to any one of claims 104 to 108 further comprising a mesh portion over which the rollers will be located.

1 10. A barrier according to any one of claims 82 to 109 wherein the security devices comprise vehicles barriers located adjacent the attack side of the barrier.