JPH02136272U

JPH02136272U -

Info

Publication number: JPH02136272U
Application number: JP4613089U
Authority: JP
Priority date: 1989-04-19
Filing date: 1989-04-19
Publication date: 1990-11-14

Description

[Brief explanation of drawings]

第１図は本考案の定着装置とガイド板との関係
を示す側面図、第２図と第２ａ図はそれぞれ用紙
の移動の状態の説明図、第３図は用紙が定着され
ている状態の説明図、第４図は本考案の別の実施
例の側面図、第５図は第４図に示されるガイド板
の正面図、第６図は本考案の他の実施例の斜視図
、第７図は一般的な画像形成装置の説明図、第８
図は従来の定着装置における画像のずれを示す説
明図、第９図は用紙に生じるボウイングの説明図
、第９ａ図はその正面図であり、第１０図は用紙
の湾曲状態の説明図である。図中の符号、１……感光体ドラム、７……搬送
ベルト装置、１０……定着装置、１１……加熱ロ
ーラ、１２……加圧ローラ、１５……ガイド板。 Fig. 1 is a side view showing the relationship between the fixing device of the present invention and the guide plate, Figs. 2 and 2a are explanatory diagrams of the state of paper movement, and Fig. 3 shows the state of paper being fixed. 4 is a side view of another embodiment of the present invention, FIG. 5 is a front view of the guide plate shown in FIG. 4, and FIG. 6 is a perspective view of another embodiment of the present invention. Figure 7 is an explanatory diagram of a general image forming apparatus;
The figure is an explanatory diagram showing image deviation in a conventional fixing device, Fig. 9 is an explanatory diagram of bowing that occurs in paper, Fig. 9a is a front view thereof, and Fig. 10 is an explanatory diagram of a curved state of paper. . Symbols in the figure: 1...photosensitive drum, 7...transport belt device, 10...fixing device, 11...heating roller, 12...pressure roller, 15...guide plate.

Claims

[Claims for Utility Model Registration] (1) The paper bearing the unfixed toner image is conveyed from the image transfer section to the fixing device via a conveyor belt device and a guide plate, and the paper carrying the unfixed toner image is conveyed to the fixing device by the heating roller of the fixing device and pressurized. In a device that melts toner and fixes it on paper by nipping it between a roller and applying heat and pressure, a guide plate disposed between the conveyor belt device and the fixing device is placed on the side of the fixing device. The height of the tip of the guide plate is set to be at least 50% higher than the diameter of the heating roller with respect to the nip position between the two rollers, and the tip of the guide plate is set at a position higher than the nip position between the two rollers. A paper guide device in a fixing device, characterized in that the paper guide device is arranged so as to be spaced apart by a predetermined distance depending on the width of the paper. (2) The sheet carrying the unfixed toner image is conveyed from the image transfer section to the fixing device via the conveying belt device and the guide plate, and is nipped between the heating roller and pressure roller of the fixing device. In a device that melts toner and fixes it on paper by applying heat and pressure, portions on both sides of the guide plate in the paper conveyance direction, which is disposed between the conveyance belt device and the fixing device, are bent diagonally downward. 1. A paper guide device in a fixing device, characterized in that a guide surface is formed in a substantially mountain shape with a flat top. (3) The sheet carrying the unfixed toner image is conveyed from the image transfer section to the fixing device via the conveying belt device and the guide plate, and is nipped between the heating roller and pressure roller of the fixing device. In a device that uses heat and pressure to melt toner and fix it on paper, a guide plate disposed between the conveyor belt device and the fixing device has a guide plate that is high in the center with respect to the paper conveyance direction and that is high on both sides. A paper guide device in a fixing device, characterized in that it is constructed of a curved surface with a portion hanging down.