Security fence panel and security fence

Abstract

A security fence panel (2), where wires (2a) of a first set of parallel wires (2a, 2b) are arranged on the other side of a second set of parallel wires (2c) from, and are arranged at a spacing from, the rest (2b) of the wires of the first set (2a, 2b), and the wires from the first set (2a, 2b) cross the wires from the second set (2c) and are welded thereto at the points of intersection. A security fence (1) comprising such a security fence panel (2).

Claims

1. A security fence panel for a fence for protecting buildings or areas by preventing persons from getting through to these buildings or areas by breaking through or climbing over the fence using simple hand tools for a certain time, comprising: a first set of wires extending substantially parallel to one another; and a second set of wires extending substantially parallel to one another; wherein the wires from the first set and the second set intersect, and where the wires from the first set and the second set intersect are mutually welded; wherein the first set of wires comprises third and fourth sets of wires, and wherein the first set of wires, viewed in the longitudinal direction of the wires from the second set, are arranged at a mutual spacing of between 10 and 15 mm; and wherein the third and fourth sets of wires are on opposite sides of the second set of wires, and wherein, along a length of the second set of wires, groups of one or more of the third set of wires and of the fourth set of wires alternate, and are spaced from one another in the longitudinal direction of the second set of wires, and are not positioned directly opposite one another across the second set of wires.

2. The security fence panel according to claim 1, characterized in that the second set of wires extend, in the mounted state of the panel, substantially vertically.

3. The security fence panel according to claim 1, characterized in that the first set of wires extend, in the mounted state of the panel, substantially horizontally.

4. The security fence panel according to claim 1, characterized in that the wires of the first set are arranged alternately on both sides of the second set of wires.

5. The security fence panel according to claim 1, characterized in that the wires have a substantially round cross section.

6. The security fence panel according to claim 5, characterized in that the wires have a diameter of between 2 and 8 mm.

7. The security fence panel according to claim 1, characterized in that the wires are made of steel.

8. The security fence panel according to claim 1, characterized in that the wires from the second set, viewed in the longitudinal direction of the wires from the first set, are arranged at a mutual spacing of between 60 and 140 mm.

9. The security fence panel according to claim 1, characterized in that the wires from the second set, viewed at a same position in a longitudinal direction of the wires from the second set, are provided with an equal bend.

10. A security fence, comprising a post and the security fence panel according to claim 1, which panel is fastened to said post.

11. A security fence, comprising one or more of the security fence panels according to claim 1 fastened to fence posts.

12. The security fence of claim 11, wherein the third set of wires comprises part of the first set of wires and the fourth set of wires comprises the rest of the wires of the first set.

13. The security fence of claim 12, wherein the security fence panels are fastened to the fence posts by clamps and bolts.

14. The security fence of claim 12, wherein the security fence panels are fastened to the fence posts with continuous plates which at least partially cover a corresponding side of the fence posts.

15. The security fence panel of claim 1, wherein the first set of wires runs along the entire height of the security fence panel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In this detailed description, reference is made by means of reference numerals to the appended drawings, wherein in

(2) FIG. 1 a part of an embodiment of a security fence according to the present invention is depicted in perspective, comprising a first embodiment of a fence panel according to the present invention;

(3) FIG. 2 a part of the first embodiment of a fence panel according to the present invention is represented in side view;

(4) FIG. 3 a part of a second embodiment of a fence panel according to the present invention is represented in side view;

(5) FIG. 4 a part of a third embodiment of a fence panel according to the present invention is represented in side view.

DETAILED DESCRIPTION OF EMBODIMENTS

(6) In FIGS. 1 and 2, a first embodiment of a security wire panel (2) according to the invention is depicted.

(7) In FIG. 3, a second embodiment of a security wire panel (2) according to the invention is depicted.

(8) In FIG. 4, a third embodiment of a security wire panel (2) according to the invention is depicted.

(9) Both embodiments comprise a first set of wires (2a, 2b), which in the mounted state are arranged horizontally, and a second set of wires (2c), which in the mounted state are arranged vertically.

(10) The wires from the first set (2a, 2b) are in the first embodiment arranged alternately (viewed in FIG. 1) on the front side (2a) and on the rear side (2b) of the wires from the second set (2c) and, at the places where these cross the wires from the second set (2c), are welded to these wires from the second set (2c).

(11) The wires from the first set (2a, 2b) are in the second embodiment arranged alternately, in 10s, on the front side (2a) and on the rear side (2b) of the wires from the second set (2c) and, at the places where these cross the wires from the second set (2c), are welded to these wires from the second set (2c).

(12) The welding together of the wires (2a, 2c) can be realized, for example, with an automatic welding machine. The wires (2a, 2c) of the preferred embodiments are mutually welded by a TIG welding process, wherein no welding material is added and the weld joint is obtained by melting of the material of the wires (2a, 2b, 2c). Less preferably, a MIG welding process could also be chosen, wherein the joint is obtained by means of a welding material provided in the molten state. Resistance welding is also amongst the options.

(13) The wires (2a, 2b, 2c) are made of steel having a low carbon content. The tensile strength of these steel wires (2a, 2b, 2c) is between 400 N/mm.sup.2 and 700 N/mm.sup.2. The wires (2a, 2b, 2c) from both embodiments have a round cross section with a diameter of between 2 and 8 mm, so that they cannot easily be cut through.

(14) The wire panels (2) can be installed with bare and untreated wires, but the wire panels (2) can also first be galvanized. The wire panels (2) comprising bare wires (2a, 2b, 2c) and the galvanized wire panels (2) can also be subsequently provided with a plastics coating, with preference for polyester or PVC.

(15) Preferably, the spacing between the horizontal wires (2a, 2b) is chosen as a function of the prevention of placement of fingers, toes or objects therebetween, whilst the spacing between the vertical wires (2c) is chosen as a function of the desired final strength of the wire panel (2) when the given horizontal wires (2a, 2b) are known.

(16) The dimensions of the meshes of the most commonly found similar security panels according to the prior art, having horizontal and vertical wires, currently measure 12.7 mm (between the horizontal wires) by 76.2 mm (between the vertical wires). In order to obtain a strong panel, having the same kind of wires (2a, 2b, 2c), the meshes of the first embodiment of a wire panel (2) from FIGS. 1 and 2 can be realized with dimensions of 12.7 mm (between the horizontal wires) by 101.6 mm (between the vertical wires). A weight reduction of 2.5% is then hereby realized.

(17) With equally large meshes, a panel according to the present invention becomes more than twice as strong as the most commonly found similar security panels according to the prior art.

(18) An infinitely large number of variants of security wire panels (2) according to the invention are conceivable. Thus variants can be provided, for example, with additional end stiffening elements, as described, for example, in US 2011/0062404 A1. Variants can also, for example, be provided with additional elements, as described, for example, in GB 2 480 913 A. Furthermore, variants can be provided, for example, with a third set of wires, extending in parallel, which cross the first set of wires and are connected thereto at the level of the points of intersection. This third set of wires can here be disposed, for example, on a single side of the panel and be connected to that part of the wires from the first set which are located on this side of the second set of wires. In addition, variants can exist, for example, with variations of angles at which the wires intersect, as described, for example, in ZA 2006/09593, etc.

(19) In FIG. 1, wire panels (2) according to the first embodiment are fastened to fence posts (3) with the aid of appropriate clamps (4) and bolts (5) in order to arrive at a security fence (1) according to the present invention. The fence posts (3) can here be disposed, for example, in concrete in the ground, or can be anchored, for example, to a base.

(20) In FIG. 4, the wires from the second set (2c), viewed at a same position in a longitudinal direction, are provided with an equal bend

(21) An infinitely large number of variants of security fences (1) having fence panels (2) according to the present invention are also conceivable. Thus alternative clamps (5) can be used, or alternative fence posts (3) can be used, or the fence panels (2) can be bolted, etc., to these fence posts (3) with continuous plates which at least partially cover the corresponding side of the fence posts (3), etc.