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Fixing device and image forming apparatus

A technology of fixing belt and heat source, applied in the fields of fixing devices and image forming devices, can solve problems such as the operation of the heating stop device and the time delay of the start of the heating stop device.

Active Publication Date: 2016-05-18
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned fixing device, if the distance between the fixing belt and the heating stop device is too small, although the fixing belt does not rise excessively in temperature, the heating stop device may also operate.
In addition, if the distance between the fixing belt and the heating stop device is too large, when the heat source is out of control (the heat source is still heating the fixing belt when the rotation of the fixing belt is stopped), the time for the heating stop device to start operation may be delayed.

Method used

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  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus

Examples

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Embodiment Construction

[0015] First, refer to figure 1 The overall configuration of the electrophotographic printer 1 (image forming apparatus) will be described. Next, put figure 1 The near side of the paper is the front side of the printer 1 . Arrows Fr, Rr, L, R, U, and Lo indicated in each figure indicate the front side, rear side, left side, right side, upper side, and lower side of the printer 1, respectively.

[0016] The printer 1 has a box-shaped printer body 2 , a paper feed cassette 3 for storing paper (recording media) is provided in the lower part of the printer body 2 , and a paper output tray 4 is provided on the upper surface of the printer body 2 . On the upper surface of the printer main body 2 , an openable and closable upper cover 5 is attached to the side of the output tray 4 , and a toner cartridge 6 is accommodated under the upper cover 5 .

[0017] On the upper part of the printer main body 2 , an exposure unit 7 constituted by a laser scanning unit (LSU) is disposed below...

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PUM

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Abstract

The invention discloses a fixing device and an image forming apparatus. A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member and a first heating stop device. The fixing belt is provided to be rotatable around a rotation axis. The pressuring member is configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip. The heat source is arranged at an inner diameter side of the fixing belt, provided at a position displaced from the rotation axis and configured to heat the fixing belt. The pressing member is configured to press the fixing belt to a side of the pressuring member. The first heating stop device is configured to face an outer circumferential face of a closest part to the heat source of the fixing belt and to operate at a first operating temperature so as to stop the heat source from heating the fixing belt.

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 having the fixing device. Background technique [0002] Conventionally, electrophotographic image forming apparatuses such as copiers and printers have fixing devices for fixing toner images on recording media such as paper. [0003] For example, a fixing device is known which has: a fixing belt; a pressing member which is brought into pressure contact with the fixing belt to form a fixing nip; a heat source which heats the fixing belt; and a heating stop means. , which is disposed facing the outer peripheral surface of the fixing belt. In such a fixing device, if the temperature of the fixing belt rises excessively, the heating stop device operates to stop the heating of the fixing belt by the heat source. [0004] In the above-mentioned fixing device, if the distance between the fixing belt and the heating stop device is t...

Claims

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Application Information

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IPC IPC(8): G03G15/20
CPCG03G15/2017G03G15/2039G03G15/2053G03G15/2064
Inventor 山岸义弘石井智士荣木天四辻刚史
Owner KYOCERA DOCUMENT SOLUTIONS INC
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