GB2289065A

GB2289065A - Firmly knotted wire netting

Info

Publication number: GB2289065A
Application number: GB9402897A
Authority: GB
Inventors: John Nicholas Taylor
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-15
Filing date: 1994-02-15
Publication date: 1995-11-08
Also published as: GB9402897D0

Abstract

Wire netting is produced by forming lefthand and righthand coils (5, 6) of wire, threading the coils through one another at right angles so that two turns of each coil engage two turns of the other coil at each intersection, stretching the assembly of coils to form an open meshwork and flattening the netting. As illustrated the coils are stretched by passing them round rollers (10) on diverging belts (13) and are flattened by rollers (14) before being wound on a spool (16). Alternatively a panel of netting may be formed on a frame which is expanded by hydraulic rams. <IMAGE>

Description

FIRMLY KNOTTED WIRE NETTING Description This invention relates to firmly knotted wire netting.

Wire netting is used extensively in agriculture for livestock fencing and gates and in the building trade for reinforcement, Security fencing and garden boundareies etc.

The wire is normally joined by twisting which can be insecure, welding which can be expensive and alter the the properties of the metal, or linking which only gives rigidity in one direction.

This invention cheaply provides firmly knotted wire netting with square or retangular holes where the knots are secure and the properties of the wire are maintained throughout. Any thickness of wire can be used as can high tensile and mild steel wire galvanising can be done before or after production.

Three specific examples of the invention using only a few wires each for clarity, will now be described with reference to the accompanying drawings 1/3 2/3 3/3 In 1/3 and 2/3 the tracks 13 need to be very much longer in reality. The essential feature in all of the examples is the left handed and right handed coiling of the wires. Enturning them to-gether by rotating the one so that the ends pass twice through a pair of coils on each of the others and stretching the coils simultaneously to form the the firmly tied wire mesh.

The distance between knotts2ffpof the coils and the distance between each coil should equal their diameter X 2/3 approx.

Two coils each way are produced for each knott required DESCRIPTION CONTINUED To manufacture diamond shaped firmly knotted wire netting on a continuous production line (ie netting with diagonial wires) The wires 1 and 2 pass through left handed and right handed spring making machines 3 and 4 which are set to produce coils of a given diameter, spacing and length 5 and 6 then rotate as they are produced so they can be set to entwine automatically 7 and 8 before cutting to length or afterwards in a seperate operation.

At 9 the ends of a L.H. coil and a R.H.coil arte joined and connected to a narrow waisted roller 10 who's cross section is thus moving at twice

which are driven by flat belts 12 the speed of production, along a stationary track 13 that gets wider so they gradually climb from running on their waists to running on their rims ( the variable speed pulley principle ) and accelorate to symnltaneously stretch the coils in both directions between the friction panels 11.

Towards the end of the tightening process the knots pass between two pairs of rollers 14 set with a gap of 4 x thickness of the wire, which help tighten the knots before the netting is released 15 and rolled up mon a powered spool 16 for ease of transport 17 is an endless coil of spring, runnig on seperate pulleys, which the rollers 10 are joined to and are brought back to the begining again, assisting them in their cycle.

DESCRIPTION CONTINUED To produce firmly knotted wire netting with horizontal wires and virticle wires on a continuous production line.

The wires 1 and 2 pass through left handed and right handed ( anti clockwise and clockwise) spring making machines 3 and 4 which produce the coils required 5 and 6 which are cut to length.Those coils are assembled at 7 as in 8 speical wire gripping devices 9 , that are on the market, connect the ends of the right handed coils two narrow waisted rollers 10 who's cross is thus which are driven by belts 12 moving at twice the speed of the production, along a statioary

track 13 that gets wider so that they gradually climb from running on their waists to runnig on their rims and accelerate to symaltaneously stretch the coils in both directions with the aid of the powered spool 16 pulling against the braked paddle wheel 11.Towards the end of the tightening process the knotts pass between rollers 14 set at 4 X thickness of the wire, to flatten them before the netting is released at 15 and rolled up 17 is an endless coil spring running on seperate pullies to which the rollers 10 are connected to assist them in their cycle.

DESCRIPTION CONTINUED To manufacture panels of firmly knotted wire netting up to 10 meters square. The wires 1 and 2 pass through a left handed spring making machine 3 and a right handed spring making machine 4 which are set to produce coils 5 who's diameter X 2 X 22/7 ~the reqired distance between the knotts and who's distance between each coil equals diameter X 2/3 Two coils are produced for eah knot require. The coils can assemble themselves as they are being produced or be cut to length and then assembled 7 and 8 . Specially purchased connectors 9 join the wires to roller 10 who's diameter is at least 40mm which run freely inside sliding door rails 11 which are hinged on stationary pivots 12. The rails have to be strengthen and extended to take the hydraulic rams 13 which are double acting and have ajustable pressure. The rams (or cable winches for retanglar panels if preferred) drive the rails which simultaneously stretch the coils to producesymetrical joints 14 Towards the end of the tightening processr these right angled knots 14 are squeezed from above and below to assist their formation. The panel is released and can be cut to order.

Panels of diamond shaped netting can be produced by linking the end rollers on each side by spring and chain or by using a dual roller assembly in each corner which runs in both rails 11 and is connected to the diagonals the ends of each pair of left handed and right handed coils remaining are joined and connected to roller 10 at the sides, see inset A. Two extra loops per coil are needed in this instance.

Retangular panels can be produces on a retangular rack. For instance 50m X 2minstead of 10m X 10m panels of tied wire mesh

Claims

CLAIMS 1 Firmly knotted wire netting comprising clockwise and anti clockwise coils of wire, with a given diameter and spread, assembled at right angles to one another,by rotating the one so that its end pass twice through a pair loops on the others, stretched simutaneously in all directions and flattened.
2 Firmly knottec wire netting as claimed in 1 produced with diagonal wires on a continuos production line as shown andm described in 1/3.
3 Firmly knotted wire netting as claimed in 1 with horizontal and verticle wire made on a continuous production line as shown and described in 2/3.
4 Firmly knotted wire netting as claimed in 1 produced in panels with horizontal and verticle wires or diafgonal wire as shown and described in 3/3.