Brake system of wire reel in reinforcing bar binding machine

摘要

A reinforcing bar binding machine is provided with a feed device for feeding a wire from a wire reel rotatably mounted on a binding machine body, a braking device for braking a rotation of the wire reel, and a control device that starts a braking to the rotation of the wire reel by the braking device after the wire is fed to a predetermined amount by the feed device.

主权项

1. A reinforcing bar binding machine in which a wire is fed out from a wire reel rotatably mounted on a binding machine body, the fed wire is wound around reinforcing bars, and the wound wire is twisted to bind the reinforcing bars, the reinforcing bar binding machine comprising:
feed means for feeding out the wire from the wire reel when the feed means is activated; braking means comprising a stopper member that brakes a rotation of the wire reel; driving means comprising a solenoid having an iron core; a shaft that connects the braking means and the driving means; a link mechanism that operates simultaneously with the iron core of the solenoid; biasing means that biases the braking means; and control means that starts operating the solenoid to brake the rotation of the wire reel in the feeding direction by the braking means after the wire is fed out a predetermined amount by the feed means and before the feed means is deactivated to stop feeding out the wire and before the wire reel stops rotating in the feeding direction, wherein the braking means engages with an engaging portion of the wire reel by a driving force of the driving means before the feed means is deactivated, and wherein the braking means returns to an initial position by a biasing force of the biasing means when the driving means is in an off state.