SHEET TRANSPORTATION DEVICE AND IMAGE FORMATION DEVICE

• Main Authors: OKUDA KAZUHISA, SUGAYA KENJIRO, TAKEMATSU KOJI
• Format: Patent
• Language: English; Japanese
• Published: 24.11.2015
• Subjects: CINEMATOGRAPHY; CONVEYING; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; HOLOGRAPHY; MAGNETOGRAPHY; PACKING; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; STORING; TRANSPORTING

PROBLEM TO BE SOLVED: To improve waving of a sheet in which an end part in width direction has expanded more in transportation direction than around a center.SOLUTION: There are provided a first roller pair which includes a first roller and a second roller, to transport a sheet by pinching it with a first nip part, a second roller pair which includes a third roller and a fourth roller, to pinch and transport the sheet that is transported by a second nip part of the first roller pair, and load means which applies a tensile in transportation direction on a sheet that is pinched and transported by the first nip part and the second nip part. The first roller is different from the second roller in terms of hardness, and the third roller is different from the fourth roller in terms of hardness. 【課題】本発明の目的は、シートの幅方向端部が中央付近よりも搬送方向に伸びてしまったシートの波打ちを改善することである。【解決手段】第１のローラと第２のローラとを有し、第１のニップ部によりシートを挟持して搬送する第１のローラ対と、第３のローラと第４のローラとを有し、第２のニップ部により前記第１のローラ対により搬送されたシートを挟持して搬送する第２のローラ対と、前記第１のニップ部と前記第２のニップ部により挟持して搬送されるシートに、シートの搬送方向の張力を与えるための負荷手段と、を有し、前記第１のローラと前記第２のローラは硬度が異なり、前記第３のローラと前記第４のローラは硬度が異なる。【選択図】 図６