There is described a joining device comprising a stamp which can be moved up and down between a lower working position and an upper loading position. A dummy module is secured to the front end of the main frame and a single wheel is mounted rearwardly of the front end and midway between the laterally opposite sides of the main frame. According to various embodiments of the invention, an interference structure is provided to limit the range of deflection of the probe. Accordingly, the staged construction prevents the antenna from rotating due to induced translational vibration and thus enhances the pointing performance for the antenna.