Pressing bar device of book -binding machine

The utility model relates to a book -binding machine technical field, concretely relates to pressing bar device of book -binding machine, it includes the pressing bar device body, this pressing bar device body includes depression bar, changer lever, return spring and pressure pole fixed block, pressure pole fixed block is installed on changer lever, and changer lever is last to be installed on thefloor surfaces right side, the vertical gliding depression bar from top to bottom that sets up is provided with return spring on the pressure pole fixed block on the depression bar, it adopts compressive rod assembly, moves through the motor drive screw rod and drives the reduction gear up -and -down motion to the cylindrical cam action of drive switching crown of roll end, the drive switching axle rotates afterwards, makes the depression bar arrange in between reduction gear and the last pressure rivet body, it has simple structure, convenient to use, and the simple operation can utilize thedepression bar roof press