Fence wire stretcher

B - Operations – Transporting – 21 – F

Patent

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Details

B21F 9/00 (2006.01)

Patent

CA 2224030

A wire clamp device affixed to an outer end of a bar in a wire tightener of the type having a stationary wire holding clamp at an opposite end of the bar. A carrier is mounted on the bar and is also provided with a wire holding clamp. The bar is provided with a jack rack and the carrier has a jack mechanism for forcibly driving the carrier toward the first wire holding clamp so as to pull end portions of two strands of wire held by the two wire holding clamps toward each other. The wire clamp device which also has a wire holding clamp is positioned to hold the strand held by the wire holding clamp of the carrier after it has been drawn towards the first wire holding clamp so that the wire holding clamp on the carrier may be released to allow the carrier to be reset to a position near the wire clamp device, after which the wire holding clamp on the carrier is again activated to grasp again the tightened strand which it had previously held. The carrier can again be driven toward the stationary wire holding clamp at the opposite end after release of the strand from the wire clamp device. The presence of the wire clamp device makes it unnecessary to temporarily fasten the strand being tightened by movement of the carrier in order to allow the carrier to be reset to a position for further tightening of the strand.

Attache-fil fixé à l'extrémité extérieure d'une barre dans un tendeur de fil du type muni d'un porte-fil stationnaire situé à une extrémité opposée de la barre. Un support, également muni d'un porte-fil, est monté sur la barre. La barre comprend une crémaillère à cric, et le support comporte un mécanisme à cric pour entraîner le support par force vers le premier porte-fil de façon à tirer l'une vers l'autre les extrémités de deux torons métalliques retenus par les porte-fils. L'attache-fil, qui comporte aussi un porte-fil, est placé pour tenir le toron, retenu par le porte-fil du support après son étirement vers le premier porte-fil, de façon à relâcher le porte-fil du support pour permettre à ce dernier d'être replacé près de l'attache-fil. Ensuite, le porte-fil du support est activé de nouveau pour saisir le toron étiré qu'il retenait au préalable. Le support peut de nouveau être entraîné vers le porte-fil stationnaire à l'extrémité opposée après le relâchement du toron de l'attache-fil. La présence de l'attache-fil évite d'avoir à fixer temporairement le toron étiré par le déplacement du support afin de replacer le support à une position requise pour un étirement additionnel du toron.

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