JP2009204745A5 - - Google Patents

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Publication number
JP2009204745A5
JP2009204745A5 JP2008045105A JP2008045105A JP2009204745A5 JP 2009204745 A5 JP2009204745 A5 JP 2009204745A5 JP 2008045105 A JP2008045105 A JP 2008045105A JP 2008045105 A JP2008045105 A JP 2008045105A JP 2009204745 A5 JP2009204745 A5 JP 2009204745A5
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JP
Japan
Prior art keywords
magnetic field
heating element
value
fixing device
damaged
Prior art date
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Application number
JP2008045105A
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Japanese (ja)
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JP2009204745A (en
JP5102066B2 (en
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Priority to JP2008045105A priority Critical patent/JP5102066B2/en
Priority claimed from JP2008045105A external-priority patent/JP5102066B2/en
Publication of JP2009204745A publication Critical patent/JP2009204745A/en
Publication of JP2009204745A5 publication Critical patent/JP2009204745A5/ja
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Publication of JP5102066B2 publication Critical patent/JP5102066B2/en
Expired - Fee Related legal-status Critical Current
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Claims (9)

未定着の現像剤像を記録媒体に定着させる定着装置であって、
交流磁界を発生する交流磁界発生手段と、
前記交流磁界発生手段が発生した交流磁界によって発熱する発熱体と、
前記交流磁界発生手段が発生した交流磁界が透過している前記発熱体に誘導される電流又は電圧の値を検出する検出手段と、
前記検出手段により検出された前記電流又は電圧の値に基づいて前記発熱体が損傷しているか否かを判別する判別手段と、
前記発熱体が損傷していると判別されると、前記交流磁界発生手段を停止させて保護する保護手段と
を含み、
前記検出手段は、前記交流磁界発生手段が発生した交流磁界のうち、前記発熱体上の異なる位置をそれぞれ透過してきた交流磁界によって誘導された電流又は電圧の値を検出し、
前記判別手段は、
前記発熱体上の異なる位置でそれぞれ検出された電流又は電圧の値間の差分に応じて前記発熱体が損傷しているか否かを判別することを特徴とする定着装置。 A fixing device for fixing an unfixed developer image on a recording medium,
AC magnetic field generating means for generating an AC magnetic field;
A heating element that generates heat by the AC magnetic field generated by the AC magnetic field generating means;
Detecting means for detecting a current or voltage value induced in the heating element through which the alternating magnetic field generated by the alternating magnetic field generating means is transmitted;
Discriminating means for discriminating whether or not the heating element is damaged based on the value of the current or voltage detected by the detecting means;
When the heating element is determined to be damaged, see containing and protection means for protecting by stopping the AC magnetic field generating means,
The detection means detects the value of the current or voltage induced by the AC magnetic field transmitted through different positions on the heating element among the AC magnetic fields generated by the AC magnetic field generation means,
The discrimination means includes
A fixing device that determines whether or not the heating element is damaged according to a difference between current or voltage values respectively detected at different positions on the heating element . 前記判別手段は、
前記差分を算出する算出手段と、
前記発熱体が損傷しているか否かを判別するための閾値と、算出された前記差分とを比較する比較手段と
を含み、
前記保護手段は、前記差分が前記閾値を超えると前記交流磁界発生手段を停止させることを特徴とする請求項１に記載の定着装置。 The discrimination means includes
Calculating means for calculating the difference;
A threshold for determining whether or not the heating element is damaged, and comparison means for comparing the calculated difference,
The fixing device according to claim 1 , wherein the protection unit stops the AC magnetic field generation unit when the difference exceeds the threshold value. 前記交流磁界発生手段に供給される電力に応じて前記閾値を調整する閾値調整手段をさらに含むことを特徴とする請求項２に記載の定着装置。 The fixing device according to claim 2 , further comprising a threshold adjustment unit that adjusts the threshold according to electric power supplied to the AC magnetic field generation unit. 前記検出手段は、
前記交流磁界発生手段が発生した交流磁界を受信する、直列に接続された複数のアンテナ
を含むことを特徴とする請求項１ないし３のいずれか１項に記載の定着装置。 The detection means includes
The AC magnetic field generating means for receiving the AC magnetic field is generated, the fixing device according to any one of claims 1, characterized in that it comprises a plurality of antennas which are connected in series 3. 前記発熱体が損傷しているか否かが判別される前に、第１の値の電力を前記交流磁界発生手段に供給し、前記発熱体が損傷していないと判別されると、前記第１の値よりも大きな第２の値の電力を前記交流磁界発生手段に供給するよう制御する電力制御手段を含むことを特徴とする請求項１ないし４のいずれか１項に記載の定着装置。 Before it is determined whether or not the heating element is damaged, power of a first value is supplied to the AC magnetic field generating means, and when it is determined that the heating element is not damaged, the fixing device according to any one of claims 1 to 4 the power of the larger second value than the value, characterized in that it comprises a power control means for controlling so as to supply to the AC magnetic field generating means. 前記検出手段は、
前記交流磁界発生手段が発生した交流磁界によって誘導された電流又は電圧の値を所定のサンプル周期ごとに検出し、
前記判別手段は、
前記所定のサンプル周期ごとに検出された複数の前記電流又は電圧の値の変化に基づいて、前記発熱体が損傷しているか否かを判別することを特徴とする請求項１に記載の定着装置。 The detection means includes
Detecting the value of the current or voltage induced by the alternating magnetic field generated by the alternating magnetic field generating means for each predetermined sample period;
The discrimination means includes
The fixing device according to claim 1, wherein it is determined whether or not the heating element is damaged based on a plurality of changes in the values of the current or voltage detected at the predetermined sample period. . 前記判別手段は、
検出された前記複数の値のうちの最小値に対する差分が所定の閾値を超える新たな値が前記検出手段によって検出されると、前記発熱体が損傷していると判別することを特徴とする請求項６に記載の定着装置。 The discrimination means includes
Claims difference with respect to the minimum value among the detected plurality of values if the new value exceeds a predetermined threshold value is detected by said detecting means, and discriminates between the heating element is damaged Item 7. The fixing device according to Item 6 . 前記検出手段は、
前記交流磁界発生手段に供給される電力の値が変更されてから所定時間経過後に前記電圧の値のサンプルを実行することを特徴とする請求項６又は７に記載の定着装置。 The detection means includes
8. The fixing device according to claim 6 , wherein a sample of the voltage value is executed after a predetermined time has elapsed since a value of power supplied to the AC magnetic field generating unit is changed. 画像形成装置であって、
請求項１ないし８のいずれか１項に記載された定着装置を含むことを特徴とする画像形成装置。 An image forming apparatus,
An image forming apparatus comprising the fixing device according to any one of claims 1 to 8.
JP2008045105A 2008-02-26 2008-02-26 Fixing apparatus and image forming apparatus Expired - Fee Related JP5102066B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008045105A JP5102066B2 (en) 2008-02-26 2008-02-26 Fixing apparatus and image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008045105A JP5102066B2 (en) 2008-02-26 2008-02-26 Fixing apparatus and image forming apparatus

Publications (3)

Publication Number Publication Date
JP2009204745A JP2009204745A (en) 2009-09-10
JP2009204745A5 true JP2009204745A5 (en) 2011-04-07
JP5102066B2 JP5102066B2 (en) 2012-12-19

Family

ID=41147104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008045105A Expired - Fee Related JP5102066B2 (en) 2008-02-26 2008-02-26 Fixing apparatus and image forming apparatus

Country Status (1)

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JP (1) JP5102066B2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5455603B2 (en) * 2009-12-17 2014-03-26 キヤノン株式会社 Image forming apparatus having an induction heating type fixing device
JP5465082B2 (en) * 2010-05-06 2014-04-09 キヤノン株式会社 Heating control apparatus and image forming apparatus
JP5669511B2 (en) 2010-10-12 2015-02-12 キヤノン株式会社 Heating apparatus and image forming apparatus
JP5665553B2 (en) * 2011-01-07 2015-02-04 三菱電機株式会社 Electromagnetic heating equipment system
JP5849416B2 (en) * 2011-03-25 2016-01-27 Toto株式会社 Heating toilet seat device
JP5353948B2 (en) 2011-05-26 2013-11-27 コニカミノルタ株式会社 Fixing apparatus and image forming apparatus
JP5568782B2 (en) 2011-10-24 2014-08-13 コニカミノルタ株式会社 Fixing apparatus, image forming apparatus, and damage detection method
JP2013125116A (en) 2011-12-14 2013-06-24 Kyocera Document Solutions Inc Fixing device and image forming device
JP6317660B2 (en) * 2014-09-19 2018-04-25 トクデン株式会社 Fluid heating device
JP7207923B2 (en) * 2018-09-28 2023-01-18 キヤノン株式会社 image heating device
JP7207924B2 (en) * 2018-09-28 2023-01-18 キヤノン株式会社 Temperature detection device and image heating device using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1074006A (en) * 1996-08-30 1998-03-17 Minolta Co Ltd Induction fixing device
US6898409B2 (en) * 2003-03-05 2005-05-24 Kabushiki Kaisha Toshiba Fixing apparatus
JP4961816B2 (en) * 2006-04-18 2012-06-27 富士ゼロックス株式会社 Belt fixing device and image forming apparatus using the same

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