Bead feeding clamp mechanism

The utility model discloses a bead feeding clamp mechanism which comprises a bottom plate, a bead clamp sliding on the bottom plate and a driving piece driving the bead clamp to advance and retreat, the bead clamp is provided with a pair of clamping arms which are matched with each other and can be opened and closed, a clamping opening is formed in the corresponding position between the pair of clamping arms, and the driving piece is provided with a driving assembly. A clamp opening structure capable of controlling the bead clamp to be opened is arranged between the bead clamp and the driving piece; according to the utility model, the rear part of the bead clamp is provided with the pair of adjusting arms for driving the bead clamp to clamp, and the adjusting structure which is matched with the adjusting arms and drives and presses the adjusting arms to enable the bead clamp to keep normally closed clamping, and the adjusting arms are driven and pressed by the adjusting structure to enable the clamping arms o