Wire feeding and straightening early warning device of diamond net machine

A rack is fixed to the ground or a balance weight base, one end of the upper portion of the rack is fixedly connected with a pipe sleeve, the side face, adjacent to the pipe sleeve, of the rack fixes a travel switch through a fixing block, the bottom end of a connecting rod shaft penetrates through the pipe sleeve to be fixedly connected with the top of an L-shaped plate, and a blocking cap is arranged at the top of the connecting rod shaft. The pulley is rotatably connected with the vertical section of the L-shaped plate, the guide cylinder is fixed at the lower part of the vertical section of the L-shaped plate, the guide cylinder is provided with a vertical through hole, the outer edge of the V-shaped wheel is in frictional contact with the circumferential wall of the pulley, and a V-shaped ring groove is formed in the circumference of the V-shaped wheel and is used for allowing a metal wire to pass through; when the connecting rod shaft is subjected to abnormal downward pulling force caused by the deforme