An inclined flange roller is located outward of an end portion of a tension roller in the belt width direction. The inclined flange roller includes a flange surface capable of being in contact with the edge portion of a belt in a region in which the belt is wound around the tension roller and a roller surface capable of being in contact with an inner peripheral surface of the belt between the flange surface and an end portion of the tension roller in the belt width direction.

Belt conveyor system comprising: an endless mesh belt, the belt having a mesh structure and having edge areas at the lateral sides, a drive mechanism drivable by a drive motor to rotate the belt, and a steering roller for steering the lateral position of the belt, wherein an edge area comprises a band running substantially parallel to the lateral sides, the band comprising an elastic filler being provided inside the mesh structure, the elastic filler being discernible from the mesh structure, and wherein the belt conveyor system further comprises a band position detector for detecting the lateral position of the band.

A transfer transporting device includes multiple rollers, an endless belt, a pair of support members, and a pair of unloading members. The rollers include a driving roller and a driven roller. The driving roller is disposed closer to an image carrier that has a toner image formed thereon and that holds the toner image. The driven roller is disposed apart from the driving roller downstream in a sheet transport direction. The endless belt is wound around the rollers. The pair of support members each have an outer wall surface facing a side end surface of the belt. The pair of support members are disposed on both sides of the belt to rotatably support a rotation shaft protruding from side end surfaces of the driving roller. The pair of unloading members are interposed between the outer wall surfaces of the pair of support members and the side end surfaces of the driving roller. The pair of unloading members each reduce, while being in contact with a corresponding one of the side end surfaces of the belt, a driving load on the driving roller further than in a case where the side end surfaces of the belt come into direct contact with the outer wall surfaces. The image carrier and the belt hold therebetween a sheet transported thereto to transfer the toner image on the image carrier to the sheet, and transport the sheet downstream.

A transfer transporting device includes multiple rollers, an endless belt, a pair of support members, and a pair of unloading members. The rollers include a driving roller and a driven roller. The driving roller is disposed closer to an image carrier that has a toner image formed thereon and that holds the toner image. The driven roller is disposed apart from the driving roller downstream in a sheet transport direction. The endless belt is wound around the rollers. The pair of support members each have an outer wall surface facing a side end surface of the belt. The pair of support members are disposed on both sides of the belt to rotatably support a rotation shaft protruding from side end surfaces of the driving roller. The pair of unloading members are interposed between the outer wall surfaces of the pair of support members and the side end surfaces of the driving roller. The pair of unloading members each reduce, while being in contact with a corresponding one of the side end surfaces of the belt, a driving load on the driving roller further than in a case where the side end surfaces of the belt come into direct contact with the outer wall surfaces. The image carrier and the belt hold therebetween a sheet transported thereto to transfer the toner image on the image carrier to the sheet, and transport the sheet downstream.

Belt conveyor system comprising: an endless mesh belt, the belt having a mesh structure and having edge areas at the lateral sides, a drive mechanism drivable by a drive motor to rotate the belt, and a steering roller for steering the lateral position of the belt, wherein an edge area comprises a band running substantially parallel to the lateral sides, the band comprising an elastic filler being provided inside the mesh structure, the elastic filler being discernible from the mesh structure, and wherein the belt conveyor system further comprises a band position detector for detecting the lateral position of the band.