Image forming apparatus comprising plural intermediate transfer bodies and at least one conveyance roll in contact with recording medium image side between secondary transfer units

An image forming apparatus comprising:

• a conveyor belt that conveys a recording medium in contact with one surface of the recording medium along a conveyance path;
• a plurality of intermediate transfer belts that are arranged in a conveyance direction of the conveyance path, in contact with another surface of the recording medium onto which toner images formed by a plurality of image forming sections are primarily transferred, wherein the another surface of the recording medium is opposite to the one surface in contact with the conveyor belt;
• a plurality of secondary transfer units that are arranged in a conveyance direction and secondarily transfer the toner images of the plurality of intermediate transfer belts to the other surface of the recording medium conveyed by the conveyor belt, wherein each of the plurality of secondary transfer units comprises one of the plurality of intermediate transfer belts and a backup roll and a secondary transfer roll that sandwich the one of the plurality of intermediate transfer belts;
• and
• at least one conveyance roll in contact with the other surface of the recording medium conveyed by the conveyor belt between one secondary transfer unit and another secondary transfer unit, among the plurality of secondary transfer units arranged in the conveyance direction, wherein
• the at least one conveyance roll is paired with a facing roll disposed to face the at least one conveyance roll with the conveyor belt interposed therebetween, the facing roll comprises a metal shaft portion and a rubber main body formed around the metal shaft portion, and the metal shaft portion is grounded,
• wherein a peripheral surface of the at least one conveyance roll is insulating, and
• a charging roll that charges the peripheral surface of the at least one conveyance roll with the same polarity as the toner image is provided.