Intermediate transfer device, transfer device and image forming apparatus

An intermediate transfer device comprising:

• an endless-belt-form intermediate transfer material whose outer surface successively passes, in a rotation direction, through regions where the outer surface is opposed to a first image holding member that holds a first image and a second image holding member that holds a second image;
• a first moving member that is disposed on a rear surface side of the intermediate transfer material and on a side of the first image holding member, and that is movable between a first position-1, where the first moving member applies tension to the intermediate transfer material, and a second position-1, which is farther from the intermediate transfer material than the first position-1;
• a second moving member that is disposed on the rear surface side of the intermediate transfer material and on a side of the second image holding member, and that is movable between a first position-2, where the second moving member applies tension to the intermediate transfer material, and a second position-2, which is farther from the intermediate transfer material than the first position-2;
• a first tension applying member that is disposed on an upstream side, in the rotation direction of the intermediate transfer material, of the first moving member and that applies tension to the intermediate transfer material;
• a second tension applying member that is disposed on a downstream side, in the rotation direction of the intermediate transfer material, of the second moving member and that applies tension to the intermediate transfer material;
• and
• a third tension applying member that is disposed on the rear surface side of the intermediate transfer material, and that applies tension to the intermediate transfer material when at least either the first moving member is moved to the second position-1 or the second moving member is moved to the second position-2, and that is separated from the intermediate transfer material when the first moving member is in the first position-1 and the second moving member is in the first position-2.