JPS59189660U

JPS59189660U - fuser

Info

Publication number: JPS59189660U
Application number: JP8383683U
Authority: JP
Inventors: 細井　正敏; 沼波　隆; 伊藤　実彦
Original assignee: 株式会社リコー
Priority date: 1983-06-03
Filing date: 1983-06-03
Publication date: 1984-12-15

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案に係る定着器部分を中心とじた複写機の
要部簡略側面図、第２図は第１実施例に係る検知方式を
示す波形図、第３図は検知回路のブロック図、第４図は
第２実施例に係る第２図同様図、第５図は第３実施例に
係る第２図同様図である。３・・・ヒータ、−４・・・表面温度検出器、５・・・
雰囲気温度検出器、１１・・・異常判断を行なう手段と
してのＣＰｔＪ、　Ａ・・・表面温度、Ｂ・・・雰囲気
温度、Ｔ□・・・雰囲気温度異常検知用設定温度、Ｔ２
・・・表面温度異常検知用設定温度。FIG. 1 is a simplified side view of the main parts of a copying machine centered on the fixing unit according to the present invention, FIG. 2 is a waveform diagram showing the detection method according to the first embodiment, and FIG. 3 is a block diagram of the detection circuit. , FIG. 4 is a diagram similar to FIG. 2 according to the second embodiment, and FIG. 5 is a diagram similar to FIG. 2 according to the third embodiment. 3...Heater, -4...Surface temperature detector, 5...
Atmosphere temperature detector, 11...CPtJ as a means for determining abnormality, A...Surface temperature, B...Ambient temperature, T□...Set temperature for ambient temperature abnormality detection, T2
...Set temperature for surface temperature abnormality detection.

Claims

[Scope of utility model registration request]

In a radiant heat fixing device using a heater, a means for detecting the surface temperature of the heater and a means for detecting the ambient temperature near the heater are provided, and at least one of the surface temperature and the ambient temperature reaches the fixing possible temperature within a certain period of time. A fixing device that is characterized by determining that there is an abnormality if the temperature does not reach a temperature set lower than .