JPH0437962U

JPH0437962U -

Info

Publication number: JPH0437962U
Application number: JP7937790U
Authority: JP
Priority date: 1990-07-26
Filing date: 1990-07-26
Publication date: 1992-03-31
Anticipated expiration: 2005-07-26
Also published as: JP2527670Y2

Description

[Brief explanation of the drawing]

第１図は本考案の定着装置の側面図、第２図は
本考案の定着装置に用いるローラの平面図、第２
ａ図は加圧ベルトに張力が付与された場合のロー
ラの変形を示す説明図、第３図は加圧ベルトに添
加するカーボンの量と帯電量の関係を示すグラフ
、第４図は本考案の剥離爪の構成を示す斜視図、
第５図はガラスクロスの荷重と延びの関係を示す
グラフ、第６図は従来例の定着装置の説明図、第
７図はガイドローラがたわんだ状態を示す説明図
、第８図ａは前記第７図のＡ−Ａ線で、第８図ｂ
は第７図のＢ−Ｂ線でのベルトの張り具合をそれ
ぞれ示す説明図であり、第９図は定着装置のニツ
プ部分での用紙に対するニツプ作用の説明図であ
る。図中の符号、１……定着装置、２……加熱ロー
ラ、７……排出ローラ、１０……加圧ベルト、１
１……駆動ローラ、１２……テンシヨンローラ、
１３……蛇行調整ローラ、１４，２０……ガイド
ローラ、１５……加圧プレート、２５……剥離爪
、２６……爪部材、２７……取り付け基部、２８
……折返し部。 FIG. 1 is a side view of the fixing device of the present invention, FIG. 2 is a plan view of the roller used in the fixing device of the present invention, and FIG.
Figure a is an explanatory diagram showing the deformation of the roller when tension is applied to the pressure belt, Figure 3 is a graph showing the relationship between the amount of carbon added to the pressure belt and the amount of charge, and Figure 4 is a graph showing the relationship between the amount of carbon added to the pressure belt and the amount of charge. A perspective view showing the configuration of a peeling claw,
Fig. 5 is a graph showing the relationship between the load and elongation of glass cloth, Fig. 6 is an explanatory diagram of a conventional fixing device, Fig. 7 is an explanatory diagram showing a state in which the guide roller is bent, and Fig. 8a is an explanatory diagram of the conventional fixing device. Line A-A in Figure 7, Figure 8b
9 are explanatory views showing the tension of the belt along line B--B in FIG. 7, and FIG. 9 is an explanatory view of the nip action on the paper at the nip portion of the fixing device. Symbols in the diagram: 1...Fixing device, 2...Heating roller, 7...Ejection roller, 10...Pressure belt, 1
1... Drive roller, 12... Tension roller,
13... Meandering adjustment roller, 14, 20... Guide roller, 15... Pressure plate, 25... Peeling claw, 26... Claw member, 27... Mounting base, 28
...turning section.

Claims

[Claims for Utility Model Registration] A sheet of paper bearing a toner image is pressed against a heating roller to fix it, and a means for pressing the sheet of paper against the heating roller is a heat-resistant endless belt member; A fixing device configured to drive and apply tension to the belt through a plurality of guide roller devices using a pressure plate that presses toward a heating roller, the guide roller device being A fixing device characterized in that one or more of the plurality of rollers constituting the roller is configured in a shape that allows the engagement surface with the belt to be set linearly when the belt tension is applied. Device.