JP2019105836A5

JP2019105836A5 -

Info

Publication number: JP2019105836A5
Application number: JP2018225168A
Authority: JP
Filing date: 2018-11-30
Publication date: 2019-08-29

Claims

基材の長手方向に沿って複数配設され互いに電気的に並列接続された抵抗発熱体と、
前記複数の抵抗発熱体に電力を供給する電力制御手段と、
前記複数の抵抗発熱体の１つである第１抵抗発熱体の加熱領域の温度を検知する第１温度検知手段と、
前記複数の抵抗発熱体の他の１つである第２抵抗発熱体の加熱領域の温度を検知する第２温度検知手段と、
前記第１温度検知手段の検知結果に基いて、前記複数の抵抗発熱体の温度が第１の所定温度になるように前記電力制御手段の電力量を制御すると共に、前記第２温度検知手段が第２の所定温度を検知したとき前記電力制御手段から前記複数の抵抗発熱体への電力の供給を遮断する制御手段と、
を有することを特徴とする加熱装置。 A plurality of resistance heating elements that are arranged along the longitudinal direction of the substrate and electrically connected to each other in parallel;
Power control means for supplying power to the plurality of resistance heating elements;
First temperature detection means for detecting the temperature of the heating region of the first resistance heating element that is one of the plurality of resistance heating elements;
Second temperature detection means for detecting the temperature of the heating region of the second resistance heating element, which is another one of the plurality of resistance heating elements;
Based on the detection result of the first temperature detection means, the power amount of the power control means is controlled so that the temperature of the plurality of resistance heating elements becomes a first predetermined temperature, and the second temperature detection means Control means for cutting off the supply of power from the power control means to the plurality of resistance heating elements when detecting a second predetermined temperature;
A heating device comprising:

前記第１温度検知手段が、前記基材の長手方向中央領域に配設された前記抵抗発熱体の加熱領域の温度を検知することを特徴とする請求項１の加熱装置。 The heating apparatus according to claim 1, wherein the first temperature detecting means detects a temperature of a heating region of the resistance heating element disposed in a central region in the longitudinal direction of the base material.

前記第２温度検知手段が前記基材の長手方向端部領域に配設された前記抵抗発熱体の加熱領域の温度を検知することを特徴とする請求項１又は２の加熱装置。 The heating apparatus according to claim 1 or 2, wherein the second temperature detection means detects a temperature of a heating region of the resistance heating element disposed in a longitudinal end region of the base material.

前記複数の抵抗発熱体が正の抵抗温度特性を有する抵抗材料で構成されていることを特徴とする請求項１から３のいずれか１項の加熱装置。 The heating apparatus according to any one of claims 1 to 3, wherein the plurality of resistance heating elements are made of a resistance material having a positive resistance temperature characteristic.

前記複数の抵抗発熱体が前記基材の長手方向で互いにオーバーラップしていることを特徴とする請求項１から４のいずれか１項の加熱装置。 The heating device according to any one of claims 1 to 4, wherein the plurality of resistance heating elements overlap each other in a longitudinal direction of the base material.

現像剤を担持した記録媒体を、加圧部材とニップ形成部材との間に形成される定着ニップに通すことよって前記現像剤を前記記録媒体に定着する定着装置において、
請求項１から５の加熱装置で加熱される筒状のベルト部材を配設し、当該ベルト部材の熱を前記定着ニップに伝達することを特徴とする定着装置。 In a fixing device for fixing the developer to the recording medium by passing the recording medium carrying the developer through a fixing nip formed between a pressure member and a nip forming member.
6. A fixing device comprising a cylindrical belt member heated by the heating device according to claim 1, and transmitting heat of the belt member to the fixing nip.

前記加熱装置が前記ベルト部材の内側に配設され、前記ベルト部材が前記定着ニップに挟まれた状態で前記加熱装置の回りを周回することを特徴とする請求項６の定着装置。 The fixing device according to claim 6, wherein the heating device is disposed inside the belt member and circulates around the heating device in a state where the belt member is sandwiched between the fixing nips.

前記ベルト部材の熱が前記加圧部材を介して前記定着ニップに伝達されることを特徴とする請求項６の定着装置。 The fixing device according to claim 6, wherein heat of the belt member is transmitted to the fixing nip via the pressure member.

請求項１又は２の加熱装置の前記第２温度検知手段が、前記基材の長手方向端部領域に配設された前記抵抗発熱体の下流側の前記ベルト部材の内周面に当接することを特徴とする請求項６の定着装置。 The second temperature detecting means of the heating device according to claim 1 or 2 is in contact with an inner peripheral surface of the belt member on the downstream side of the resistance heating element disposed in a longitudinal end region of the base material. The fixing device according to claim 6.

現像剤によって画像を形成する作像部と、前記作像部に記録媒体を供給する記録媒体供給部と、請求項６から９のいずれか１項の定着装置とを有することを特徴とする画像形成装置。 An image having an image forming unit that forms an image with a developer, a recording medium supply unit that supplies a recording medium to the image forming unit, and the fixing device according to claim 6. Forming equipment.