Image forming apparatus that cleans a wire of a charger

[0067]FIGS. 6 to 9 show a second embodiment. In the following description, elements already designated and described with reference to FIGS. 2 to 5 will not be redundantly described. In FIG. 6, the process unit 16 is formed with the aperture 55 and the protrusions 53L and 53R. In the process unit 16, a support shaft 74 is provided between the aperture 55 and the wire 45. The guide shaft 74 confronts with the aperture 55 and the wire 45, extends parallel to longitudinal directions of the aperture 55 and the wire 45 between the sidewalls 52L and 52R.

[0068]As shown in FIG. 7, the base 48 of the cleaning unit 47 is slidably fitted around the guide shaft 74. The base 48 is fixed to the pinching member 49 and 50 that hold the wire 45 slidably. The cleaning unit 47 is formed integrally with a protrusion 71. As shown in FIGS. 6 and 7, the protrusion 71 has a cylindrical shape and is formed integrally with the base 48 thereon. The protrusion 71 is disposed such as to protrude upward from the to