IMAGE FORMATION DEVICE AND CONVEYANCE CONTROL METHOD

• Main Authors: TAKATSUKA RYO, HIROI MASAKAZU
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2017
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To achieve an image formation device that can suppress a deviation of a writing's first line position.SOLUTION: An image formation device according to the present invention comprises: a transfer belt that conveys a developer image at a prescribed belt conveyance velocity; a medium conveyance part that conveys a recording medium along a conveyance path; a control unit that sets a medium conveyance velocity to a first velocity corresponding to the belt conveyance velocity in a first period, sets the medium conveyance velocity to a second velocity slower than the first velocity in a second period subsequent to the first period, sets the medium conveyance velocity to a third velocity faster than the second velocity, and different from the first velocity in a third period subsequent to the second period, and sets the medium conveyance velocity to the first velocity in a fourth period subsequent to the third period; a transfer unit that transfers the developer image conveyed by the transfer belt on the recording medium conveyed by the medium conveyance part; and a first detection unit that is arranged upstream with respect to the transfer unit in the conveyance path, and detects the recording medium in the first period or in the second period.SELECTED DRAWING: Figure 15 【課題】書き出し位置のずれを抑えることができる画像形成装置を得る。【解決手段】本発明の画像形成装置は、現像剤像を所定のベルト搬送速度で搬送する転写ベルトと、搬送路に沿って記録媒体を媒体搬送速度で搬送する媒体搬送部と、媒体搬送速度を、第１の期間において、ベルト搬送速度に対応する第１の速度に設定し、第１の期間の後の第２の期間において、第１の速度よりも遅い第２の速度に設定し、第２の期間の後の第３の期間において、第２の速度よりも速く第１の速度とは異なる第３の速度に設定し、第３の期間の後の第４の期間において、第１の速度に設定する制御部と、転写ベルトにより搬送された現像剤像を、媒体搬送部により搬送された記録媒体に転写する転写部と、搬送路において転写部の上流に配置され、第１の期間または第２の期間において記録媒体を検出する第１の検出部とを備える。【選択図】図１５