プリンタ定着ローラ部における紙しわ発生に関する研究(機械力学,計測,自動制御)

概要

論文の詳細を見る
The present study treats a paper wrinkle appearing in a fixing roller unit of printers or copiers with electro-photographic process. An experiment shows that a wrinkle always occurs, when an A4-sized paper is tilted by 3 degrees against a horizontal fixing roller unit without a heating mechanism and is fed to the roller nip. The wrinkle appears in the middle of the paper width starting from a point with a certain distance from the paper leading edge and running almost linearly to the paper end. Computer simulations were carried out to illustrate this wrinkle occurring process. The simulation model is composed of four elements, a rigid cylindrical driving roller, a driven rubber roller, a paper divided by shell elements and a rigid paper guide plate. The paper is assumed to be an isotropic elastic-plastic body. The results reveal the following wrinkle occurring process. When the tilted paper is fed to the rollers, the center part of the paper leading edge firstly reaches the roller nip and is pulled by the nip. Then paper wavy bending deformations appear in front of the nip. A steep slope of the deformations is crushed and yielded in the nip. After this, a neighbor area of the yielded point gathers together and a folded wrinkle is formed. Further, this type of wrinkle easily appears when the paper tilt angle, Young's modulus, or coefficient of friction is large, or when the paper yield stress is small.
2009-07-25