This invention relates to fencing in general and, more particularly, to fencing which is largely prefabricated and which is supplied in modular form. The invention is described hereinafter with reference to security fencing but this is exemplary only and is non-limiting.
Constructional details and specifications of fences depend, inter alia, on installation factors and deterrent ratings. For example, in order to meet certain security and operational requirements a fence panel can be made from a mesh sheet which has a high mesh density configuration so that it is difficult for an intruder to penetrate the panel. The width of a prefabricated fence panel determines the spacing between adjacent posts which support the panel. The provision and erection of fence posts are costly and to contain this expense a fence panel should be of a substantial width. Of equal importance is the height of a panel. If the panel is of moderate height then it does not present a meaningful barrier. On the other hand if a prefabricated panel has a significant height, say in excess of 2 m, then this factor together with the implications of substantial panel width and high mesh density mean that the panel would not only be difficult to handle because of its size and mass, but would also present problems associated with the transporting thereof.
Conceivably, prefabricated fence panels of appropriate sizes can be welded together on site but this, in turn, raises other difficulties.
It is an object of the present invention to provide a fence panel of modular construction which substantially addresses the aforementioned aspects and which, on site, can be assembled in a neat, effective and secure manner; and to provide a connecting member for use in the fence panel.
The invention provides a fence panel which includes at least a first module with a first, elongate peripheral component and a second module with a second, elongate peripheral component which is adjacent the first, elongate peripheral component, and a connecting member which is engaged, at least, with the first and second peripheral components thereby to secure the modules to each other.
Each module may comprise a respective mesh sheet of appropriate mesh density which is formed from a first array of elongate rods and a second array of elongate rods which transversely overlie and which are secured to the first array of rods, for example by means of welding, at locations at which the respective rods contact one another.
The first elongate peripheral component is preferably a first elongate rod. Similarly the second elongate peripheral component is preferably a second elongate rod.
In use the second module is positioned so that it is co-planar with, and vertically above, the first module with the first and second elongate rods extending horizontally, substantially side-by-side, and the connecting member is engaged with each of the first and second rods.
The connecting member may be formed in any suitable way, for example by means of an extrusion process, by rolling, by casting or fabrication. The invention is not limited in this respect.
Preferably, ends of the elongate rods in the second array of each module, which are respectively adjacent the first elongate rod, and the second elongate rod, are engaged, together with the first and second elongate rods, with the connecting member.
The connecting member may include an elongate body with at least a first channel within which at least the first elongate rod extends in a longitudinal direction and adjacent transverse portions of the elongate rods in the second array may extend through formations which are provided at intervals along the length of the elongate body.
The body of the connecting member may comprise an elongate channel section which, in cross-section, is substantially C-shaped with an elongate slot and, on opposed sides of the channel section, recessed formations which extend to the slot.
In another form of the invention the body of the connecting member includes two channels and a web which separates the channels, with at least one channel including an undercut formation in which one of the first and second elongate rods is located with adjacent transverse portions of the elongate rod, in the second array, extending through a mouth of the channel.
The body of the connecting member may have an elongate base, a centrally positioned web on one side of the base and a crosspiece, at an end of the web which, at least on one side of the web, forms a part of a channel and extends towards the base to define a retention formation, and which is spaced from the base to define a mouth to the channel.
If only two panels are to be interconnected then the connecting member may have a symmetrical construction in that, on each side of the web, a respective retention formation may be formed. What this means in practice is that the first and second elongate rods are respectively engageable with the channels with a sliding-type action.
If a third panel is to be connected to two panels which are already interconnected then a sliding action of the kind referred to may be problematical. It is to be understood a the plurality of the panels can be coupled together, one above the other in a planar array, to reach a height of 5 m or 6 m, for example. Posts which are required to support an assembly of this height must be of substantial dimensions. If a plurality of the panel modules are interconnected, each with a sliding action whereby a panel module is engaged with a respective connecting member, then substantial problems can be encountered in coupling the modules together. To avoid this the connecting member may be engageable with a peripheral component of a lower panel module, preferably with a sliding action and a peripheral component of an overlying module may be slotted into a channel, which faces upwardly, on the connecting member. Use may optionally be made of one or more fasteners to secure the peripheral component of the upper module to the connecting member in such a way that the upper module cannot be withdrawn from the channel.
The invention is further described by way of examples with reference to the accompanying drawings in which:
The connecting member is made in any suitable way, for example from an extrusion or by means of a rolling and subsequent working process. The invention is not limited in this regard.
The connecting member has a body 12 which, in cross-section, is in the form of an elongate C. The connecting member has a base 14, opposed curved sections 16 and 18, and a mouth 20, between opposing ends of the curved sections, which is spaced from the base.
Recessed formations 24 are formed in each of the curved sections, opposing each other, at intervals which are regularly spaced apart by a distance 26, along the length of the connecting member. Each formation 24 extends through a respective curved section 16 or 18 substantially to an inner side of the base 14.
The modules 30 and 32 are positioned side-by-side with respective lowermost and uppermost peripheral rods 36A and 36B adjacent and parallel to each other. The elongate member 10 is engaged with these rods by positioning the rod 36A inside a space partly enclosed by the curved section 16 and the rod 36B is located, opposing the rod 36A, inside a space partly enclosed by the curved section 18. Adjacent portions of the vertically extending rods 38, on the respective modules, are positioned in the respective formations 24. The spacing 26 between these formations is the same as the spacing between adjacent vertical rods 38. The panel modules are then pivoted, about the connecting member, to a co-planar, vertical orientation. Thus interengagement of the modules with the connecting member takes place with two actions, namely by passing the elongate rods through the mouth 20 of the channel and thereafter by positioning the panel modules in a co-planar relationship.
Once the modules are interconnected it is possible for a technician to bolt the flanges 44 to fence posts (not shown) previously planted in the ground. The fence posts are effectively in contact with opposing ends of each connecting member 10 and it is therefore not possible for the connecting member to be moved horizontally. It is only possible to remove the connecting member if the panel modules are detached from the fence posts and the structure is collapsed so that the rods 36A and 36B can be passed through the mouth 20.
A benefit to the process is that it then becomes practical to reduce the size of the panel modules 30 and 32. Although these modules are fairly wide they are not significantly high. They can therefore be handled by technicians with relative ease and, moreover, lend themselves to being transported in a container or on the back of a relatively small vehicle—aspects which, with a large panel of integral construction, present logistical problems.
Although the connecting member is slidably engaged with the two modules it cannot be removed from the erected panel because ends of the connecting member abut surfaces of fence posts to which the assembled modules, which make up the panel, are attached. Also, due to the aforementioned dimensional relationships, the peripheral rods cannot be transversely detached from the connecting member for they cannot pass through the respective mouths.
The preceding description has been confined, in substance, to the interconnection of a first panel module to a second panel module in a vertical array. In a preferred form of the invention this is done with a sliding-type action which has been described hereinbefore with reference to
If a fence of substantial height is required then the aforementioned technique, although useful, can be difficult to implement. For example a high security application might require a fence which is 5 m or 6 m high and wherein adjacent fence posts are spaced apart by up to 3.5 m.
If a significantly high fence is to be erected then a lowermost module 130 is positioned between, and is connected in any appropriate way, to two vertically-extending fence posts (not shown) to ensure that the spacing between the posts is correct. The posts can then be anchored in the ground by means of concrete plinths. This process can be repeated along the length of the fence.
Prior to the lowermost panel being connected to the two posts the connecting member 148 is engaged with a sliding action with an upper periphery of the lower module 130. The channel 162A faces upwardly and is not connected with an upper module.
Once the concrete plinths have set a second connecting member 148, not shown, is engaged with a sliding action with an upper periphery of a second panel 132 which is to be positioned overlying the panel 130. The lower peripheral edge of the panel 132 is then directly inserted into the upwardly facing channel 162A and, thereafter, opposing vertical edges of the second module are fixed to the respective fence posts. A third module can then be engaged with an upper end of the second module, in the manner described. The process can be continued in this way, within reason, to give an erected fence of a desired height.
A significant advantage of the described approach is that, logistically, the transporting and erection of fence panels of 5 m or 6 m high and up to 4 m wide, present a significant problem. With the modular approach referred to each fence module which is of relatively small size can be handled with comparative ease and by two or three workmen.
The fence modules are coupled together in a secure and effective way. When vertical sides of the modules are fixed to spaced-apart fence posts it is not possible for a module to be withdrawn from the channel 162A nor to be moved with a sliding action out of engagement with a channel 162. If the security of the installation is to be enhanced further a suitable fastener 180, notionally shown only in
Number | Date | Country | Kind |
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2009/03184 | May 2009 | ZA | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/IB2010/001025 | 5/4/2010 | WO | 00 | 1/4/2012 |