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Fixing device and image forming apparatus

An image and ring-shaped technology, which is applied to the electrical recording process using charge graphics, equipment and instruments using the electrical recording process using charge graphics, can solve the problem of easy deformation of the heating rotating belt, and achieve the effect of suppressing misjudgment

Active Publication Date: 2015-12-09
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is a problem that the heating rotary belt is easily deformed if the heating rotary belt in the stopped state is heated by the heater

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

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] refer to figure 1 , Embodiment 1 of the fixing device 100 according to the present invention will be described. figure 1 It is a block diagram showing the functions of the fixing device 100 according to Embodiment 1 of the present invention.

[0022] The fixing device 100 includes a first rotating body 1 , a second rotating body 4 , two heaters 6 , a pressure receiving member 2 , a supporting member 3 , a position detection unit 5 , and a control unit 8 . For example, the fixing device 100 is installed in an image forming device. The fixing device 100 heats and pressurizes the recording medium P to fuse the unfixed toner TN on the recording medium P.

[0023] The first rotating body 1 is a cylindrical heating rotating belt. The first rotating body 1 is formed in a roll shape (an endless belt shape) and has heat resistance. The first rotating body 1 is rotatable in the circumferential direction (rotation direction R1 ) around a rotation axis extending in a direction ...

Embodiment approach 2

[0039] refer to Figure 1 ~ Figure 4 , Embodiment 2 of the fixing device 100 according to the present invention will be described. figure 2 (a)~ figure 2 (f) is a schematic side view showing the first rotating body 1 . exist figure 2 (a)~ figure 2 In (f), the second rotating body 4 , the heater 6 , the pressure receiving member 2 , the supporting member 3 , and the toner TN are omitted in order to avoid excessively complicated illustration. In the second embodiment, the judging unit 81 described in the first embodiment judges the rotation state of the first rotating body 1 according to the difference in the changing directions of the radial positions La and Lb.

[0040] The judging part 81 judges the rotation state of the first rotating body 1 according to the difference between the changing direction Da of the radial position La and the changing direction Db of the radial position Lb. The "direction of change" of the radial position relative to the reference position...

Embodiment approach 3

[0070] refer to figure 1 , Figure 5 (a)~ Figure 7 , the third embodiment of the fixing device 100 of the present invention will be described. Figure 5 (a)~ Figure 5 (d) is a schematic side view showing the first rotating body 1 . and figure 2 (a)~ figure 2 (f) Similarly, in Figure 5 (a)~ Figure 5 In (d), the second rotating body 4 , the heater 6 , the pressure receiving member 2 , the supporting member 3 and the toner TN are omitted. The difference is that, compared with the determination unit 81 described in the second embodiment, the determination is made according to the direction of change, while the determination unit 81 in the third embodiment is based on the sum of the changes in the radial positions La and Lb.

[0071] The judging unit 81 judges the rotation state based on the sum of the change Qa of the radial position La detected by the first position detecting member 51 and the change Qb of the radial position Lb detected by the second position detec...

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Abstract

A fixing device includes a first rotatory body, a heater, a pressure receiving member, a supporting member, a second rotatory body, a position detection section, and a determination section. The position detection section detects a position of an outer circumferential surface of the first rotatory body in terms of a radial direction. The determination section determines a rotation state of the first rotatory body based on a result of detection by the position detection section. The position detection section includes a first position detection member and a second position detection member. The first position detection member is located upstream of the fixing nip in terms of a rotation direction of the first rotatory body. The second position detection member is located downstream of the fixing nip in terms of the rotation direction.

Description

technical field [0001] The present invention relates to a fixing device and an image forming device. Background technique [0002] Some electrophotographic image forming apparatuses are provided with a fixing device for fixing toner on a recording medium. For example, a fixing device inserts a recording medium carrying unfixed toner into a fixing gap formed by an endless belt-shaped heating rotary belt and a pressure roller, and applies heat and pressure to the recording medium to make the toner fixing. For example, a heater for heating the fixing gap is provided inside the heating rotary belt. [0003] There is a problem that if the heating rotary belt in a stopped state is heated by the heater, the heating rotary belt is easily deformed. Therefore, when an abnormality occurs in the rotation state of the heating rotary belt, it is necessary to stop the heating of the heater as soon as possible. [0004] For example, some fixing devices can regularly detect the radial po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2053G03G15/5008G03G15/2017G03G15/2039
Inventor 近藤昭浩
Owner KYOCERA DOCUMENT SOLUTIONS INC
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