EP3109376B1 - Barbed wire fence - Google Patents
Barbed wire fence Download PDFInfo
- Publication number
- EP3109376B1 EP3109376B1 EP16175726.5A EP16175726A EP3109376B1 EP 3109376 B1 EP3109376 B1 EP 3109376B1 EP 16175726 A EP16175726 A EP 16175726A EP 3109376 B1 EP3109376 B1 EP 3109376B1
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- European Patent Office
- Prior art keywords
- wire
- wires
- fence
- joints
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/02—Wire fencing, e.g. made of wire mesh
- E04H17/04—Wire fencing, e.g. made of wire mesh characterised by the use of specially adapted wire, e.g. barbed wire, wire mesh, toothed strip or the like; Coupling means therefor
- E04H17/045—Barbed wire or toothed strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F25/00—Making barbed wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/02—Making wire network, i.e. wire nets without additional connecting elements or material at crossings, e.g. connected by knitting
Definitions
- the present invention generally relates to wire fences and in particular to a wire fence as typically used for field fencing and animal containment. More specifically, the invention is related to a wire fence having sharp points, barb end(s), forming an aggressive part pointed out on one side of the erecting plane of the fence.
- fences are freestanding structure designed to restrict or prevent movement across a boundary. Fences are distinguished from walls by the lightness of their structure. Fences are largely used in agriculture but also elsewhere, where the divisions or subdivisions of areas become important.
- fences used outside in large fields are called field fences.
- field fences There are various types of field fences amongst which wire fences and barbed wire fences.
- wires fences are widely used.
- wire fences and/or barbed wires are employed. Indeed, in order to prevent for example cows from leaning against the fencing or attempting from escaping over the fence, barbed wire can be employed for the whole fencing or as an additional element of a wire fence.
- US 715,541 and US 418,617 discloses wire fences erected with several line wires and provided with barbs extending in the fence plane from the wire lines, either upwardly or downwardly. Upwardly pointing barbs are not desirable for animal fencing, since they will only stick into the animal once above the fence.
- Such steel wire fence consists of a plurality of line wires running parallel to the ground, the line wires being maintained spaced apart at regular intervals by lengths of wire referred to as stay wires.
- the stay wires extend generally perpendicularly to the wire lines and are united to the line wires at their ends intersecting with the line wires. That is, a stay wire extends between two adjacent line wires, and is wrapped at each end around the line wire to form a hinge joint.
- Hinge joint fences are e.g. described in BS EN 10223-5:2012 "Steel wire and wire products for fencing and netting", part 5, from the British Standard Institution.
- Hinge joint fences can absorb animal impact without damage and is the most economical joint choice available.
- one or two lines of barbed wire are generally fixed along the top line wire of a hinge joint wire fence, or installed within 10 to 50 cm inside the fencing, at about the same height.
- the barbed wire prevents cows from heavily leaning against the fence, or from attempting escaping, thereby helping in protecting the fence.
- animal fencing as carried out today remains a multi-step operation, where the hinge joint wire fence is first installed; and barbed wire is installed in a second step.
- Barbed wire manipulation remains burdensome, since great care is required to avoid operator injury.
- the barbed wire is simply rolled around the top of the wire fence, it also protrudes on the external side of the fencing, causing a risk of injury for persons (strollers%) approaching too close.
- US 561,193 and US 908,757 disclose barbed wire fences comprising a series of parallel wire strands connected by stay wires. Adjacent wire strands are connected by a series of stay wires arranged connecting the strands by being coiled at their end portions about the strands in such manner as to interlock the coils of the stay wires. Furthermore the terminal portions of the stay wires are pointed out to form laterally protruding barb at each intersection in the fencing.
- the object of the present invention is to provide a simple fencing solution, adapted for animal fencing, that can be manufactured in a simple and cost effective process and that can be rapidly installed.
- the present invention relates to a barbed wire fence of the type comprising a plurality of wires arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion.
- at least part of the joints are configured in such a way that a free end of the joining wire portion protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end.
- the present wire fence thus readily incorporates barbs that protrude laterally/on the side of the fence, i.e. they are not in the fence plane but turned toward the animals enclosed in the fence. Therefore, the barb ends preferably all protrude on the same side of the fence.
- the barb ends are formed by a free end portion of a wire that is involved in a joint uniting two intersecting wires, which may then be referred to as barb joint.
- This approach is advantageous from the manufacturing point of view, since the barbs are obtained during the joint forming operation, by means of the wire that is normally used for connecting the intersecting wires together.
- the joints are of the hinge type, where an end portion (forming the joining wire portion) of one of the intersecting wires is wrapped around the other wire.
- an end portion (forming the joining wire portion) of one of the intersecting wires is wrapped around the other wire.
- the free end of the wrapped joining portion is left to protrude out of the fence plane.
- a hinge joint wire fence in accordance with a preferred embodiment of the invention comprises a number of line wires spaced apart, preferably extending substantially parallel to one another, and two adjacent wire lines are united by transverse wires that are distributed along the wire lines, the ends of each of the transverse wires constituting the joining wire portions forming the joints around the respective line wires.
- Each joint is obtained by wrapping a transverse wire end portion around the respective intersecting wire line so as to form a hinge joint.
- at least some of the hinge joints are thus realised as barb hinge joint having a free end of the joining wire portion protruding on one side of the fence.
- a hinge joint of an interior wire line is formed with end portions of two intersecting transverse wires coming from respective adjacent line wires.
- the two intersecting transverse wires may be wrapped in a helicoidal manner around the interior line wire, with one or more loops in common.
- Such joint may also be realised as barb joint, but generally using only one of the transverse wire free ends to form a protruding barb.
- the barb joints may be arranged at any desirable wire intersection.
- the barb joints in the upper region of the fence, e.g. along the top edge line wire (or along the two or three top line wires), to prevent animals from leaning on the fence.
- Barb joints may also be arranged in the bottom fence region, and/or along the bottom edge line wire (or 2 or 3 bottom line wires), to deter animals from attempting crawling under the fence.
- the protruding barbs at the barb joints extend preferably sensibly perpendicularly to the fence.
- the barb ends may form an angle between 60° and 120° with the plane of the erected fence, or between 75° and 105°.
- the barb ends may protrude by at least 0.5 cm, 0.75 or 1 cm, preferably between 1 and 2 cm, from the fence plane.
- the transverse wires involved in the latter are made from steel having a comparatively greater tensile strength than that of the other transverse wires. This improves the stability and stiffness of the barbed sections, which will better resist load and therefore keep their deterrent function, while other sections may tend to bent under a heavy load by an animal.
- the present invention also relates to a process for manufacturing a wire fence comprising a plurality of wires arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion.
- the process is characterized in that at least part of the joints are formed by wrapping the joining wire portion at the wire intersection in such a way that a free end thereof protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end.
- the plurality of wires includes a number of line wires (12) spaced apart, preferably extending substantially parallel to one another; the process comprising: uniting two adjacent wire lines by transverse wires (14) that are distributed along the wire lines, the ends of each transverse wires constituting said joining wire portion that are wrapped around the respective line wires to form hinge joints.
- the wire fence 10 comprises a plurality of parallel line wires 12 1 to 12 n that are maintained in a spaced apart relationship by transverse wires 14 1 to 14 n generally referred to as stay wires.
- the line wires 12 i typically a relatively long single line wire- extend generally parallel to the ground and are therefore often horizontal.
- the transverse/stay wires 14 i are comparatively smaller lengths of wire (single strand) and extend transversally between two adjacent/neighbouring line wires 12 i and 12 i+1 , often in a perpendicular manner (hence often vertically).
- Each stay wire 14 i is united at both extremities with a respective intersecting wire line 12 i , 12 i+1 , in such a way as to form a joint.
- an end portion of the stay wire, forming a joining wire portion is wrapped (or coiled) around the line wire with which it intersects.
- the stay wires 14 i are distributed at periodic intervals along the line wires.
- the stay wires in two consecutive rows are aligned and form a regular mesh pattern.
- different mesh pattern shapes can be envisaged, e.g. square or rectangular, and that the stay wires of two consecutive rows may be offset, forming a staggered stay wire configuration.
- the stay wires 14 1 in the top row have their top joining end portion around the first/top line wire 12 1 (top selvedge line) and their bottom joining end portion around the second line wire 12 2 .
- the stay wires 14 2 of the second wire line 12 2 are aligned with those the stay wires 14 1 of the first row.
- stay wires 14 1 and 14 2 of the first and second rows intersect at a same location with the second line wire 12 2 .
- the joining ends of stay wires 14 1 and 14 2 are often jointly wrapped around the line wire.
- At least part of the stay wires have at least one of their end portions protruding on one (lateral) side of the fence 10 so as to form a barb end (or spike).
- Such joints are referred hereinafter also as barbed hinge joints.
- the stay wires 14 1 of the first row form at their intersection with the first line 12 1 a joint that is obtained by wrapping the stay wire 14 1 in such a way as to form a free, terminal wire end protruding on one side of the fence, out from the fence plane.
- the upper end portion of stay wire 14 1 (forming a joining wire portion) is wound around the top line wire 12 1 , typically making about two loops around the line wire 12 1 , and the upper free end of wire 14 1 is arranged to form a barb end 18 protruding on the side of the fence, i.e. generally perpendicularly to the fence plane.
- the barb joint 16 of Fig. 2 can be compared with a conventional joint on a top line wire as shown in Fig. 6 .
- the stay wire 50 is normally wrapped around the line wire 52 by its joining portion 54 so that there is no protruding length of wire.
- the stay wire joining portion 54 is closely wrapped around the line wire, without protruding, and the wire 52 ends with a flat cut terminal end, here oriented upwardly.
- the present fence 10 thus has its top line wire 12 1 featured with barb joints 16, the latter having laterally protruding barbs 18. Thanks to these integrated barb joints 16, the present fence can be readily installed for animal fencing, and does not require additional lines of barbed wire. Preferably, the barb ends 18 at the barb joints 16 protrude on the same side of the fence 10.
- the fence When the present fence is used for animal fencing near a road or walking path, the fence is of course oriented so that the barbs of the barb joints are turned inside the fence, towards the animals. The barbs will thus provide their deterrent effect against the animals, discouraging them from leaning against the fence. At the same time, since the barbs are turned on the same animal side, people walking along the fence no longer risk injuring themselves or tearing their clothes if they come too close.
- the lower joint of the 1 st row of stay wires 14 1 form a joint on the second line wire 12 2 , where they are, wrapped together with the joining end portion of the stay wires 14 2 from the second row.
- the lower end portions of the first row stay wires 14 1 form a conventional hinge joint, indicated 20, and the same is true for the other stay wires of the fence which form conventional hinged joints 20 at their intersections with line wires.
- a joint 20 of conventional design, involving two stay wires intersecting a same line wire is shown in Fig. 8.
- the two wires are jointly wrapped, on the same side of the intersection.
- Fig. 4 there is shown a second embodiment of the present wire fence 10', where the first two line wires 12 1 and 12 2 of the fence are featured with barb joints.
- the barb joints 16 are formed in the same way as joints 16 in Figs.2 .
- the barb joints On the second line, the barb joints, designated 16', here involve two stay wires 14 1 and 14 2 , and are wrapped around the line wire 12 2 in a conventional manner, however one of the stay wires 14 2 has a barb forming free end portion 18 that protrudes on one side of the fence.
- Fig.6 one can see that the upper and lower stay wires 14 1 and 14 2 , coming respectively from the 1 st and 3 rd line wires adjacent 2 nd line wire 12 2 , are initially jointly wrapped in a conventional manner.
- the lower stay wire 14 2 has a longer joining portion, the free end of which is left to protrude perpendicularly to the fence so as to form a barb end 18.
- the protruding ends 18 As for the barb-joints 16 of the first line, the protruding ends 18 have a sharp end.
- the joints at the lower intermediate line wires are conventional hinged joints 20 as shown in Fig.5 .
- barb hinge joints 16 or 16' can be provided at any desired joint in the wire fence.
- barb joints can be provided on the lower region, on the lower selvedge line 12 n and possibly on the neighbouring lines, which is beneficial to prevent animals from wiggling under the fence.
- the wire used for the line and stay wires may generally be metallic wires, particularly steel preferably coated with a protective coating (typically galvanised).
- the line wires 12 supporting the barb joints are preferably steel wires, advantageously coated with metallic (typically galvanised) and/or organic layers (typically with thermoplastic coatings for example polyvinyl chloride, polyethylene or paints for example polyester, polyurethane).
- metallic typically galvanised
- organic layers typically with thermoplastic coatings for example polyvinyl chloride, polyethylene or paints for example polyester, polyurethane.
- thermoplastic coatings for example polyvinyl chloride, polyethylene or paints for example polyester, polyurethane.
- Organic layers could provide an increase of the adherence between transverse and line wires by increasing the stick-slip effect (friction between both surfaces) or by compression.
- the wires are then securely anchored against both rotation and longitudinal movement.
- Organic layers can bring an additional colour allowing a better visualisation of the fence.
- the transverse wires 14 having their joining end portion participating in barb joints 16 or 16' may advantageously consist of steel wires having a greater tensile strength that the other stay wires, in order to provides a stronger barbed fence, preferably a tensile strength of at least 700 N/mm 2 .
- the transverse/stay wires that from regular joints 20 may have a diameter in the range of 1.6 to 2.5 mm, in particular 1.9 to 2.0 mm; the tensile strength may be in the range of 400 to 600 N/mm 2 .
- the transverse wires 14 having their joining end portion(s) participating in barb joints 16 or 16' may consist of steel wires having similar diameter and a greater tensile strength, e.g. in the range of 700 to 900 N/mm 2 .
- the lines wires may have a diameter in the range of 1.60 to 3.40 mm, in particular 1.90 mm to 2.40 mm.
- the top wire and/or bottom wire may have a larger diameter than the other line wires.
- the tensile strength for line wires may vary between 700 and 1400 N/mm 2 , in particular it may be in one of the following ranges: 700-900 N/mm 2 , 1050-1200 N/mm 2 , 1200-1400 N/mm 2 .
- the present wire fence may generally be manufactured to conform with above-mentioned standard BS EN 10223-5:2012, except for the barb joints 16, 16'.
- the barb forming free ends 18 at the barb joints 16, 16' advantageously have a sharp end that may be obtained by performing a bias cut with a chisel, or other appropriate tool, instead of a straight perpendicular cut.
- the so obtained barb ends or spikes 18 may have a protruding length of at least 0.5 cm, e.g. 1 to 2 cm.
- the line wires 12 i may be evenly and regularly crimped between the stay wires 14i to aid erection of the fence, which is further generally rolled upon manufacturing to facilitate storage and transport.
- hinge joint wire fence can be manufactured on a traditional hinge joint forming machine.
- the technical layout of the machine will however need to be partly adapted to allow forming and cutting each barb end, which is formed as an extension of the helicoidally/spirally wrapped wire portion of the respective hinge joint (installed on selected line wires of the fence).
- Stay wire end portions will be wrapped around the line wire and cut at the over-length of min 5 mm, typically between 10 and 20 mm at an angle of e.g. 45-70° (relative to the wire axis) to create a sharp spike forming the barb end.
- Such barb end is preferably oriented in an angle of about 60 to 120°, preferably about 75 to 105°, more preferably about 90°, to the surface of the fence, creating a protective function. The orientation of the barb is realized by adjusting the twisting device in the machine.
- the rolls can be provided with peripheral grooves to accommodate the barb ends.
- the spooler may be modified as well to enable spooling without damaging the barb ends. And ensure safe take off of the finished roll.
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Description
- The present invention generally relates to wire fences and in particular to a wire fence as typically used for field fencing and animal containment. More specifically, the invention is related to a wire fence having sharp points, barb end(s), forming an aggressive part pointed out on one side of the erecting plane of the fence.
- As it is known in the art, fences are freestanding structure designed to restrict or prevent movement across a boundary. Fences are distinguished from walls by the lightness of their structure. Fences are largely used in agriculture but also elsewhere, where the divisions or subdivisions of areas become important.
- Fences used outside in large fields are called field fences. There are various types of field fences amongst which wire fences and barbed wire fences. In agricultural fencing, for instance, wires fences are widely used.
- For animal containment, wire fences and/or barbed wires are employed. Indeed, in order to prevent for example cows from leaning against the fencing or attempting from escaping over the fence, barbed wire can be employed for the whole fencing or as an additional element of a wire fence.
- The need for barbed fencing has existed in fact in various domains, as can be seen from the vast prior art.
- For example,
US 715,541 andUS 418,617 discloses wire fences erected with several line wires and provided with barbs extending in the fence plane from the wire lines, either upwardly or downwardly. Upwardly pointing barbs are not desirable for animal fencing, since they will only stick into the animal once above the fence. - Another approach that was proposed consists in modifying a welded wire mesh fence. For example,
US 2,660,406 discloses welded wire mesh panels comprising barbs formed after a cutting and bending operation carried out on some of the welded wires. A similar solution is disclosed inUS 2,271,314 . This appears to be a cumbersome and costly manufacturing technique. Furthermore, for field fencing, woven or knotted wire fences are generally preferred to welded wire fences, because they can be more easily transported in rolls and are less expensive. - Today, a very popular type of field fence for animals is the wire fence with so-called hinge joints. Such steel wire fence consists of a plurality of line wires running parallel to the ground, the line wires being maintained spaced apart at regular intervals by lengths of wire referred to as stay wires. The stay wires extend generally perpendicularly to the wire lines and are united to the line wires at their ends intersecting with the line wires. That is, a stay wire extends between two adjacent line wires, and is wrapped at each end around the line wire to form a hinge joint. Hinge joint fences are e.g. described in BS EN 10223-5:2012 "Steel wire and wire products for fencing and netting", part 5, from the British Standard Institution.
- Hinge joint fences can absorb animal impact without damage and is the most economical joint choice available.
- It must however be noticed that, in practice, one or two lines of barbed wire are generally fixed along the top line wire of a hinge joint wire fence, or installed within 10 to 50 cm inside the fencing, at about the same height. The barbed wire prevents cows from heavily leaning against the fence, or from attempting escaping, thereby helping in protecting the fence.
- Hence, animal fencing, as carried out today remains a multi-step operation, where the hinge joint wire fence is first installed; and barbed wire is installed in a second step. Barbed wire manipulation remains burdensome, since great care is required to avoid operator injury. Furthermore, when the barbed wire is simply rolled around the top of the wire fence, it also protrudes on the external side of the fencing, causing a risk of injury for persons (strollers...) approaching too close.
-
US 561,193 andUS 908,757 disclose barbed wire fences comprising a series of parallel wire strands connected by stay wires. Adjacent wire strands are connected by a series of stay wires arranged connecting the strands by being coiled at their end portions about the strands in such manner as to interlock the coils of the stay wires. Furthermore the terminal portions of the stay wires are pointed out to form laterally protruding barb at each intersection in the fencing. - The object of the present invention is to provide a simple fencing solution, adapted for animal fencing, that can be manufactured in a simple and cost effective process and that can be rapidly installed.
- This object is achieved by a barbed wire fence as claimed in
claim 1. - The present invention relates to a barbed wire fence of the type comprising a plurality of wires arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion. According to an important aspect of the invention, at least part of the joints are configured in such a way that a free end of the joining wire portion protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end.
- The present wire fence thus readily incorporates barbs that protrude laterally/on the side of the fence, i.e. they are not in the fence plane but turned toward the animals enclosed in the fence. Therefore, the barb ends preferably all protrude on the same side of the fence.
- It shall be appreciated that the barb ends (also referred to as spikes) are formed by a free end portion of a wire that is involved in a joint uniting two intersecting wires, which may then be referred to as barb joint. This approach is advantageous from the manufacturing point of view, since the barbs are obtained during the joint forming operation, by means of the wire that is normally used for connecting the intersecting wires together.
- Contrary to prior art welded wire fences as .e.g. known from
US 2,660,406 , it is not required to manufacture additional wire lines that will later be cut and bent. - Preferably, the joints are of the hinge type, where an end portion (forming the joining wire portion) of one of the intersecting wires is wrapped around the other wire. To form a barb hinge joint, the free end of the wrapped joining portion is left to protrude out of the fence plane.
- A hinge joint wire fence in accordance with a preferred embodiment of the invention comprises a number of line wires spaced apart, preferably extending substantially parallel to one another, and two adjacent wire lines are united by transverse wires that are distributed along the wire lines, the ends of each of the transverse wires constituting the joining wire portions forming the joints around the respective line wires. Each joint is obtained by wrapping a transverse wire end portion around the respective intersecting wire line so as to form a hinge joint. In accordance with the invention, at least some of the hinge joints are thus realised as barb hinge joint having a free end of the joining wire portion protruding on one side of the fence.
- As is clear to those skilled in the art, a hinge joint of an interior wire line is formed with end portions of two intersecting transverse wires coming from respective adjacent line wires. The two intersecting transverse wires may be wrapped in a helicoidal manner around the interior line wire, with one or more loops in common. Such joint may also be realised as barb joint, but generally using only one of the transverse wire free ends to form a protruding barb.
- The barb joints may be arranged at any desirable wire intersection. In practice, it is interesting to arrange the barb joints in the upper region of the fence, e.g. along the top edge line wire (or along the two or three top line wires), to prevent animals from leaning on the fence. Barb joints may also be arranged in the bottom fence region, and/or along the bottom edge line wire (or 2 or 3 bottom line wires), to deter animals from attempting crawling under the fence.
- In general, the protruding barbs at the barb joints extend preferably sensibly perpendicularly to the fence. Although an angle of about 90° is preferred, the barb ends may form an angle between 60° and 120° with the plane of the erected fence, or between 75° and 105°. The barb ends may protrude by at least 0.5 cm, 0.75 or 1 cm, preferably between 1 and 2 cm, from the fence plane.
- For increased strength of the barb joints, the transverse wires involved in the latter (and having a barb-forming free end portion), in particular in the upper fence region, are made from steel having a comparatively greater tensile strength than that of the other transverse wires. This improves the stability and stiffness of the barbed sections, which will better resist load and therefore keep their deterrent function, while other sections may tend to bent under a heavy load by an animal.
- It may be noted that although the present invention has been developed on the basis of a hinge joint wire fence, those skilled in the art may use the present inventive concept in other joint configurations, using a joining wire portion to unite intersecting wires. For example, in a knot mesh wire fence where intersecting line and stay wires are joined by a length of separate joining wire wound around the wire intersection to form a fixing knot, a free end of such joining wire may be left to protrude on the side of the fence to form a barb end.
- According to another aspect, the present invention also relates to a process for manufacturing a wire fence comprising a plurality of wires arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion. The process is characterized in that at least part of the joints are formed by wrapping the joining wire portion at the wire intersection in such a way that a free end thereof protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end.
- To manufacture a hinge joint type wire fence, the plurality of wires includes a number of line wires (12) spaced apart, preferably extending substantially parallel to one another; the process comprising: uniting two adjacent wire lines by transverse wires (14) that are distributed along the wire lines, the ends of each transverse wires constituting said joining wire portion that are wrapped around the respective line wires to form hinge joints.
- The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
-
FIG. 1 : is a schematic diagram of a first embodiment of the present wire fence with hinged joints; -
FIG. 2 : shows enlarged views of a barb joint on the top line wire at detail A inFig.1 , namely a) as seen when facing the fence and b) from above the fence; -
FIG. 3 : is a schematic diagram of a second embodiment of the present wire fence; -
FIG. 4 : shows enlarged views of a barb joint on the 2nd wire line at detail C inFig.4 , namely a) as seen when facing the fence and b) from above the fence; -
FIG. 5 : shows enlarged views of a joint on intermediate line wire at detail D inFig.1 , namely a) as seen when facing the fence and b) from above the fence. -
FIG. 6 : a view of a conventional hinged joint in the top line wire of a hinge joint wire fence. - A first embodiment of the
present wire fence 10 is shown inFig.1 , where the joints are generally of the hinge type. Thewire fence 10 comprises a plurality ofparallel line wires 121 to 12n that are maintained in a spaced apart relationship bytransverse wires 141 to 14n generally referred to as stay wires. The line wires 12i -typically a relatively long single line wire- extend generally parallel to the ground and are therefore often horizontal. The transverse/stay wires 14i are comparatively smaller lengths of wire (single strand) and extend transversally between two adjacent/neighbouringline wires stay wire 14i is united at both extremities with a respectiveintersecting wire line stay wires 14i are distributed at periodic intervals along the line wires. - In the embodiment of
Fig.1 , the stay wires in two consecutive rows (i.e.stay wires 14i and stay wires 14i+1) are aligned and form a regular mesh pattern. It may be noted that different mesh pattern shapes can be envisaged, e.g. square or rectangular, and that the stay wires of two consecutive rows may be offset, forming a staggered stay wire configuration. - Classically, the
stay wires 141 in the top row have their top joining end portion around the first/top line wire 121 (top selvedge line) and their bottom joining end portion around thesecond line wire 122. In the case of aligned stay wires as shown inFig. 2 , thestay wires 142 of thesecond wire line 122 are aligned with those thestay wires 141 of the first row. Hence, staywires second line wire 122. In such case, the joining ends ofstay wires - It shall be appreciated that according to the present design, at least part of the stay wires have at least one of their end portions protruding on one (lateral) side of the
fence 10 so as to form a barb end (or spike). Such joints are referred hereinafter also as barbed hinge joints. - In the embodiment of
Fig.1 , only thetop line wire 121 is provided with barb hinge joints, designated 16. Hence, thestay wires 141 of the first row form at their intersection with the first line 121 a joint that is obtained by wrapping thestay wire 141 in such a way as to form a free, terminal wire end protruding on one side of the fence, out from the fence plane. This is illustrated in detail inFigs. 2 and3 : the upper end portion of stay wire 141 (forming a joining wire portion) is wound around thetop line wire 121, typically making about two loops around theline wire 121, and the upper free end ofwire 141 is arranged to form abarb end 18 protruding on the side of the fence, i.e. generally perpendicularly to the fence plane. - The
barb joint 16 ofFig. 2 can be compared with a conventional joint on a top line wire as shown inFig. 6 . In a conventional hinged joint, thestay wire 50 is normally wrapped around theline wire 52 by its joiningportion 54 so that there is no protruding length of wire. As can be seen inFig.6 b), the staywire joining portion 54 is closely wrapped around the line wire, without protruding, and thewire 52 ends with a flat cut terminal end, here oriented upwardly. - The
present fence 10 thus has itstop line wire 121 featured withbarb joints 16, the latter having laterally protrudingbarbs 18. Thanks to these integrated barb joints 16, the present fence can be readily installed for animal fencing, and does not require additional lines of barbed wire. Preferably, the barb ends 18 at the barb joints 16 protrude on the same side of thefence 10. - When the present fence is used for animal fencing near a road or walking path, the fence is of course oriented so that the barbs of the barb joints are turned inside the fence, towards the animals. The barbs will thus provide their deterrent effect against the animals, discouraging them from leaning against the fence. At the same time, since the barbs are turned on the same animal side, people walking along the fence no longer risk injuring themselves or tearing their clothes if they come too close.
- Conventionally, the lower joint of the 1st row of
stay wires 141 form a joint on thesecond line wire 122, where they are, wrapped together with the joining end portion of thestay wires 142 from the second row. Hence, the lower end portions of the firstrow stay wires 141 form a conventional hinge joint, indicated 20, and the same is true for the other stay wires of the fence which form conventional hingedjoints 20 at their intersections with line wires. - A joint 20 of conventional design, involving two stay wires intersecting a same line wire is shown in Fig. 8. The two wires are jointly wrapped, on the same side of the intersection.
- Turning now to
Fig. 4 , there is shown a second embodiment of the present wire fence 10', where the first twoline wires first line wire 121, the barb joints 16 are formed in the same way asjoints 16 inFigs.2 . - On the second line, the barb joints, designated 16', here involve two
stay wires line wire 122 in a conventional manner, however one of thestay wires 142 has a barb formingfree end portion 18 that protrudes on one side of the fence. Turning toFig.6 , one can see that the upper andlower stay wires line wire 122, are initially jointly wrapped in a conventional manner. However, thelower stay wire 142 has a longer joining portion, the free end of which is left to protrude perpendicularly to the fence so as to form abarb end 18. As for the barb-joints 16 of the first line, the protruding ends 18 have a sharp end. - In the example of
Fig. 3 the joints at the lower intermediate line wires are conventional hingedjoints 20 as shown inFig.5 . - As it will be clear to those skilled in the art, barb hinge joints 16 or 16' according to the present design, involving one or two stay wires, can be provided at any desired joint in the wire fence. In practice, in addition to the upper fence region, barb joints can be provided on the lower region, on the
lower selvedge line 12n and possibly on the neighbouring lines, which is beneficial to prevent animals from wiggling under the fence. - Conventionally, the wire used for the line and stay wires may generally be metallic wires, particularly steel preferably coated with a protective coating (typically galvanised).
- The
line wires 12 supporting the barb joints are preferably steel wires, advantageously coated with metallic (typically galvanised) and/or organic layers (typically with thermoplastic coatings for example polyvinyl chloride, polyethylene or paints for example polyester, polyurethane). Organic layers could provide an increase of the adherence between transverse and line wires by increasing the stick-slip effect (friction between both surfaces) or by compression. The wires are then securely anchored against both rotation and longitudinal movement. Organic layers can bring an additional colour allowing a better visualisation of the fence. - The
transverse wires 14 having their joining end portion participating inbarb joints 16 or 16' may advantageously consist of steel wires having a greater tensile strength that the other stay wires, in order to provides a stronger barbed fence, preferably a tensile strength of at least 700 N/mm2. - For example, the transverse/stay wires that from regular joints 20 (i.e. do not form barb joints) may have a diameter in the range of 1.6 to 2.5 mm, in particular 1.9 to 2.0 mm; the tensile strength may be in the range of 400 to 600 N/mm2.
- The
transverse wires 14 having their joining end portion(s) participating inbarb joints 16 or 16' may consist of steel wires having similar diameter and a greater tensile strength, e.g. in the range of 700 to 900 N/mm2. - The lines wires may have a diameter in the range of 1.60 to 3.40 mm, in particular 1.90 mm to 2.40 mm. The top wire and/or bottom wire may have a larger diameter than the other line wires. The tensile strength for line wires may vary between 700 and 1400 N/mm2, in particular it may be in one of the following ranges: 700-900 N/mm2, 1050-1200 N/mm2, 1200-1400 N/mm2.
- The present wire fence may generally be manufactured to conform with above-mentioned standard BS EN 10223-5:2012, except for the barb joints 16, 16'.
- It remains to be noted that the barb forming free ends 18 at the barb joints 16, 16' advantageously have a sharp end that may be obtained by performing a bias cut with a chisel, or other appropriate tool, instead of a straight perpendicular cut. The so obtained barb ends or spikes 18 may have a protruding length of at least 0.5 cm, e.g. 1 to 2 cm.
- Although not shown in the drawings, the
line wires 12i may be evenly and regularly crimped between the stay wires 14i to aid erection of the fence, which is further generally rolled upon manufacturing to facilitate storage and transport. - The above described hinge joint wire fence can be manufactured on a traditional hinge joint forming machine. The technical layout of the machine will however need to be partly adapted to allow forming and cutting each barb end, which is formed as an extension of the helicoidally/spirally wrapped wire portion of the respective hinge joint (installed on selected line wires of the fence).
- Stay wire end portions will be wrapped around the line wire and cut at the over-length of min 5 mm, typically between 10 and 20 mm at an angle of e.g. 45-70° (relative to the wire axis) to create a sharp spike forming the barb end. Such barb end is preferably oriented in an angle of about 60 to 120°, preferably about 75 to 105°, more preferably about 90°, to the surface of the fence, creating a protective function. The orientation of the barb is realized by adjusting the twisting device in the machine.
- For a safe transport through the machine, from the twisting device to the spooler where wire fence is rolled, several deviation rolls may be modified to avoid damaging the barb ends. In particular, the rolls can be provided with peripheral grooves to accommodate the barb ends.
- The spooler may be modified as well to enable spooling without damaging the barb ends. And ensure safe take off of the finished roll.
Claims (15)
- A wire fence comprising a plurality of wires (12, 14) arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion,
wherein said plurality of wires includes a number of line wires (12) spaced apart, preferably extending substantially parallel to one another, and two adjacent line wires are united by transverse wires (14) that are distributed along the line wires, the ends of each of the transverse wires constituting joining wire portions forming said joints around the respective line wires; and at least part of said joints (16, 16') are configured in such a way that a free end (18) of said joining wire portion protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end; characterized in that the transverse wires (141; 142) forming the joints (16, 16') with protruding barb ends (18), in particular in the upper fence region, are made from steel having a comparatively greater tensile strength than that of the other transverse wires. - The wire fence according to claim 1, characterized in that said joints are hinge joints.
- The wire fence according to claim 1, wherein each of said joints are obtained by wrapping a transverse wire end portion around the respective intersecting wire line so as to form a hinge joint.
- The wire fence according to claim 3, wherein the hinge joint (20, 16') of an interior line wire (12i) is formed with end portions of two intersecting transverse wires (14i-1, 14i) coming from respective adjacent line wires.
- The wire fence according to claim 4, wherein the hinge joint is formed by wrapping said two intersecting transverse wires (141, 142) in the same direction or in opposite directions along said interior line wire.
- The wire fence according to claim 4 or 5, wherein said two intersecting transverse wires (141, 142) are wrapped in a helicoidal manner around said interior line wire (142), with one or more loops in common.
- The wire fence according to any one of the preceding claims, wherein said joints with protruding barb ends are arranged in the upper region of the fence, preferably along the top line wire, or the two or three top line wires; and/or said joints with protruding barb ends are arranged in the upper region of the fence, in particular on the last or last two line wires.
- The wire fence according to any one of the preceding claims, wherein said protruding barb ends (18) form an angle in the range of 60 to 120° with the fence plane, preferably about 75 to 105°, more preferably about 90°.
- The wire fence according to any one of the preceding claims, wherein said barb ends (18) protrude by at least 0.5 cm, preferably between 1 and 2 cm, from the fence plane.
- The wire fence according to any one of the preceding claims, wherein said barb ends (18) protrude on the same side of the wire fence.
- The wire fence according to any one of the preceding claims, wherein said barb ends (18) have a sharp end point.
- The wire fence according to any one of the preceding claims, wherein the line wires in the upper fence region, intersecting with the transverse wires forming the joints with protruding barb ends, are provided with an adherence increasing and/or coloured coating.
- The wire fence according to any one of the preceding claims, wherein said line wires consist of a single wire strand; and/or said transverse wires consist of a single wire strand, the latter extending preferably perpendicularly to the line wires.
- The wire fence according to any of the preceding claims, wherein said wire fence can be rolled, in particular for storage/transport purposes.
- A process for manufacturing a wire fence comprising a plurality of wires arranged in an intersecting manner to form a multiplicity of apertures, wherein intersecting wires are connected by joints formed by a joining wire portion, wherein said plurality of wires includes a number of line wires (12) spaced apart, preferably extending substantially parallel to one another;
the process comprising: uniting two adjacent line wires by transverse wires (14) that are distributed along the line wires, the ends of each transverse wires constituting said joining wire portion that are wrapped around the respective line wires to form hinge joints;
wherein at least part of said joints (16, 16') are formed by wrapping said joining wire portion at the wire intersection in such a way that a free end (18) thereof protrudes on one side of the fence, preferably substantially perpendicularly thereto, to form a barb end;
characterized in that the transverse wires (141; 142) forming the joints (16, 16') with protruding barb ends (18), in particular in the upper fence region, are made from steel having a comparatively greater tensile strength than that of the other transverse wires.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HRP20181049TT HRP20181049T1 (en) | 2015-06-24 | 2018-07-05 | Barbed wire fence |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU92753A LU92753B1 (en) | 2015-06-24 | 2015-06-24 | Barbed wire fence |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3109376A1 EP3109376A1 (en) | 2016-12-28 |
EP3109376B1 true EP3109376B1 (en) | 2018-05-16 |
Family
ID=53525229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16175726.5A Active EP3109376B1 (en) | 2015-06-24 | 2016-06-22 | Barbed wire fence |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3109376B1 (en) |
DK (1) | DK3109376T3 (en) |
HR (1) | HRP20181049T1 (en) |
HU (1) | HUE039563T2 (en) |
LU (1) | LU92753B1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US418617A (en) | 1889-12-31 | Orlando huffman | ||
US238255A (en) * | 1881-03-01 | Thomas shumatf | ||
US561193A (en) * | 1896-06-02 | Woven-wire fencing | ||
US285979A (en) * | 1883-10-02 | Support and guard for fencing | ||
US715541A (en) | 1899-01-16 | 1902-12-09 | Reuben H Bloomer | Woven-wire fence. |
US908757A (en) * | 1908-09-21 | 1909-01-05 | Paul W Dillon | Wire fence. |
US1434051A (en) * | 1921-10-28 | 1922-10-31 | John L Elliott | Woven-wire fence |
US2271314A (en) | 1940-03-16 | 1942-01-27 | Raymond J Southwell | Barbed wire and method of making same |
US2660406A (en) | 1943-06-03 | 1953-11-24 | United States Steel Corp | Barbed wire structure |
GB1602292A (en) * | 1978-05-30 | 1981-11-11 | Tinsley Wire Ltd | Plastics mesh |
-
2015
- 2015-06-24 LU LU92753A patent/LU92753B1/en active
-
2016
- 2016-06-22 HU HUE16175726A patent/HUE039563T2/en unknown
- 2016-06-22 EP EP16175726.5A patent/EP3109376B1/en active Active
- 2016-06-22 DK DK16175726.5T patent/DK3109376T3/en active
-
2018
- 2018-07-05 HR HRP20181049TT patent/HRP20181049T1/en unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
HUE039563T2 (en) | 2019-01-28 |
LU92753B1 (en) | 2016-12-27 |
EP3109376A1 (en) | 2016-12-28 |
DK3109376T3 (en) | 2018-08-06 |
HRP20181049T1 (en) | 2018-09-07 |
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