Ejector head pull pin of irradiation wire take-up and pay-off machine

A fastening assembly comprises a pin seat, a mounting hole is fixedly formed in the top of the pin seat, the mounting hole is communicated to the bottom of the pin seat, the bottom of the pin seat is an arc-shaped surface and is matched with the surface of a movable tip cone, a mounting screw is arranged in an inner cavity of the mounting hole, and the movable tip cone is arranged in the inner cavity of the mounting hole. The bottom of the installation screw is connected to the surface of the movable tip cone in a threaded and sleeved mode, the surface of the pin seat is slidably connected with a sleeve block in a sleeved mode, and the surface of one side of the sleeve block is slidably connected with a pulling rod in a sleeved mode. According to the ejector head pull pin of the irradiation wire take-up and pay-off machine, the up-down position and the left-right position are adjusted, so that nut locking is not needed, fastening is adopted, when a wire coil is replaced every time, the pull rod is rapidly adj