Since the rotating unit is disposed so that the drive part, which constitutes the rotating unit, is located in the inner side of the bent portion with the curved surface of the CABLEVEYOR in the side of the straight axis, there is no problem occurs by locating the drive part connected with the rotating unit in the inner side of the bent portion of the CABLEVEYOR. Therefore, the dead space formed in the inner side of the bent portion of the CABLEVEYOR can be used effectively.