A vehicle-mounted conveyor system including an infeed conveyor assembly mounted for powered rotation relative to the vehicle. The container may be formed using a mold or form or may be formed on the inside of an existing shell or structure, thereby incorporating the shell or structure as part of the container. The massage unit includes a massager projecting toward the front from the backrest. The information presentation apparatus has a meta-information management unit, which generates update information pertaining to individual documents, and a meta-information table which records the update information.