Fixing device and image forming device
A heating body and infrared technology, which is applied in the fields of fixing devices and image forming devices, can solve the problems of inability to detect that the heating body becomes high temperature, unable to accurately detect the heat of the heating body, and fire.
Active Publication Date: 2019-10-18
KYOCERA DOCUMENT SOLUTIONS INC
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Problems solved by technology
However, since the first support frame is movable to switch between pressurization and decompression between the pressurizing body and the heating body, the position of the opening may shift relative to the thermopile, and the thermopile may not be accurate. Detect the heat of the heating body
[0009] In this way, when the heat of the heating body cannot be accurately detected, it may not be possible to detect that the heating body has become high temperature, so the heating body may be heated excessively, and a fire may also occur
Method used
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[0024] First, use figure 1 , the overall configuration of the printer 1 (image forming apparatus) will be described. Arrows Fr, Rr, L, R, U, and Lo appropriately added in the respective drawings indicate the front side, rear side, left side, right side, upper side, and lower side of the printer 1, respectively.
[0025] The printer 1 has a box-shaped printer body 2 , a paper feed cassette 3 for storing paper (recording media) is housed in the lower part of the printer body 2 , and a paper discharge tray 4 is provided on the upper surface of the printer body 2 . On the upper surface of the printer main body 2 , an upper cover 5 is attached to the side of the discharge tray 4 , and the upper cover 5 is openable and closable, and a toner cartridge 6 is accommodated under the upper cover 5 .
[0026] On the upper part of the printer main body 2 , an exposure unit 7 constituted by a laser scanning unit (LSU) is disposed below the discharge tray 4 , and an image forming unit 8 is p...
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A fixing device includes a heating body, a pressuring body, a temperature detecting part, a first frame supporting the heating body, a second frame supporting the pressuring body and a moving mechanism. The temperature detecting part has a detecting element detecting an infrared ray radiated from the heating body and detects temperature of the heating body by the detecting element. The first frame includes a heat interrupting member covering the heating body between the heating body and the temperature detecting part. The moving mechanism moves the first frame in an approaching direction or a separating direction from the second frame to establish the heating body and the pressuring body in a pressurization state or a depressurization state. The heat interrupting member includes an aperture elongated in a movement direction of the first frame to pass the infrared ray radiated from the heating body to the detecting element through the aperture.
Description
technical field [0001] The present invention relates to a fixing device for fixing a toner image on a recording medium, and an image forming apparatus including the fixing device. Background technique [0002] An electrophotographic image forming apparatus such as a copier or a printer includes a fixing device for fixing a toner image on a recording medium such as paper. [0003] For example, there is known a fixing device in which a fixing roller (heating body) that forms a fixing nip in direct contact with a pressure roller (pressing body) is configured as a heating member heated by an electromagnetic induction heating device. In this fixing device, a heating layer that generates heat by an electromagnetic induction heating device is provided on a fixing roller, the fixing roller is directly heated, and a thermopile (infrared detection element) is integrated with a coil guide. In addition, a cylindrical portion in which a through hole for attachment is formed is provided ...
Claims
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IPC IPC(8): G03G15/20G03G15/00
Inventor 四辻刚史山岸义弘荣木天川口弘达
Owner KYOCERA DOCUMENT SOLUTIONS INC