JPH0785188B2 - Photoconductor temperature control device - Google Patents
Photoconductor temperature control deviceInfo
- Publication number
- JPH0785188B2 JPH0785188B2 JP61224165A JP22416586A JPH0785188B2 JP H0785188 B2 JPH0785188 B2 JP H0785188B2 JP 61224165 A JP61224165 A JP 61224165A JP 22416586 A JP22416586 A JP 22416586A JP H0785188 B2 JPH0785188 B2 JP H0785188B2
- Authority
- JP
- Japan
- Prior art keywords
- photoconductor
- temperature
- temperature change
- heater
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008859 change Effects 0.000 claims description 38
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 108091008695 photoreceptors Proteins 0.000 claims description 2
- 230000020169 heat generation Effects 0.000 description 4
- 230000004660 morphological change Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、静電写真複写機やファクシミリなどの画像
記録装置に装備される感光体の温度調節装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for a photoconductor provided in an image recording device such as an electrostatographic copying machine or a facsimile.
感光体の吸湿に基づく所謂画像流れ（吸湿によって表面
抵抗が低下し表面電位が移動することで生ずる現像）な
どの複写不良を防止する上で、中空の感光体を内部から
加熱する電熱式ヒータを設けるとともに、この感光体の
温度変化を基にして感光体を所定の温度に維持するヒー
タ制御手段を設けて、電熱式ヒータの発熱制御によって
感光体を所定の温度に調節できるようにしたものがある
（例えば、実開昭60-92263号公報）。In order to prevent copying defects such as so-called image flow (development that occurs due to a decrease in surface resistance due to moisture absorption and movement of the surface potential) due to moisture absorption of the photoconductor, an electrothermal heater that heats the hollow photoconductor from inside is used. In addition to providing the heater, a heater control means for maintaining the photosensitive member at a predetermined temperature based on the temperature change of the photosensitive member is provided so that the photosensitive member can be adjusted to the predetermined temperature by controlling heat generation of the electrothermal heater. (For example, Japanese Utility Model Laid-Open No. 60-92263).
そして、この場合、電熱式ヒータを感光体の内面に一体
的に設ける構成であれば、この電熱式ヒータに対するブ
ラシ給電などの接触給電手段を要するとともに、これが
CPU（中央制御装置）にとって悪影響を及ぼすノイズを
発生することから、前記の装置においては、前記電熱式
ヒータを感光体の回転に関与されることなく固定的に設
けている。In this case, if the electrothermal heater is integrally provided on the inner surface of the photoconductor, contact power feeding means such as brush power feeding to the electrothermal heater is required, and
Since noise that adversely affects the CPU (central control unit) is generated, in the above device, the electrothermal heater is fixedly provided without being involved in the rotation of the photoconductor.
このように、前記温度調節装置は、優れた機能を有する
ものであるが、温度制御の応答性ならびに制御精度の面
で改善の余地が見いだされたのである。As described above, although the temperature control device has an excellent function, there is room for improvement in terms of temperature control response and control accuracy.
すなわち、前記温度調節装置においては、感光体の表面
近傍に温度センサを設けるとともに、この温度センサか
ら信号を基にしてヒータの電源回路を開閉するコントロ
ール部を設けて、ヒータ制御手段を構成していた。That is, in the temperature adjusting device, a temperature sensor is provided in the vicinity of the surface of the photoconductor, and a control section for opening and closing the power supply circuit of the heater based on a signal from the temperature sensor is provided to constitute heater control means. It was
このように、感光体の温度を間接的に検出し、これを制
御するように構成したものにおいては、制御の時間遅れ
を伴うとともに、検出温度が機内空気の流れ矢空気温度
によって左右されることから、制御温度が変動する不都
合がある。As described above, in the configuration in which the temperature of the photoconductor is indirectly detected and controlled, there is a time delay in the control, and the detected temperature depends on the air temperature in the machine. Therefore, there is an inconvenience that the control temperature fluctuates.
この発明は、上述の事柄に留意してなされたもので、感
光体の温度制御を精度よく、かつ迅速に行うことができ
る感光体の温度調節装置を提供することを目的としてい
る。The present invention has been made in view of the above matters, and an object of the present invention is to provide a temperature control device for a photoconductor that can accurately and quickly control the temperature of the photoconductor.
上記目的を達成するため、この発明は、中空の感光体を
内部から加熱する電熱式ヒータを、感光体の回転に関与
されることなく固定的に設けるとともに、感光体の温度
変化を基にして感光体を所定の温度に維持するヒータ制
御手段を設けた感光体の温度調節装置において、前記ヒ
ータ制御手段を、前記感光体の内面にこれと一体的に回
転するように設けられ、これの温度変化を直接検出して
形態的に変化する温度変化検出手段と、この温度変化検
出手段の形態的変化を間接的に検出して前記電熱式ヒー
タの電源回路を開閉する電源回路制御手段とによって構
成し、さらに、この電源回路制御手段を、前記温度変化
検出手段の変態によって光路が断続されるように温度変
化検出手段の両側に対向配置され、感光体の回転に関与
されることなく固定的に設けられている投光器と受光器
とから構成したことを特徴している。To achieve the above object, the present invention provides an electrothermal heater for heating a hollow photosensitive member from the inside, which is fixedly provided without being involved in the rotation of the photosensitive member, and is based on the temperature change of the photosensitive member. In a temperature control device for a photoconductor provided with heater control means for maintaining the photoconductor at a predetermined temperature, the heater control means is provided on an inner surface of the photoconductor so as to rotate integrally therewith, A temperature change detecting means for directly detecting the change and morphologically changing, and a power supply circuit controlling means for indirectly detecting the morphological change of the temperature change detecting means to open and close the power supply circuit of the electrothermal heater. Further, the power supply circuit control means is arranged opposite to both sides of the temperature change detection means so that the optical path is interrupted by the transformation of the temperature change detection means, and is fixed without being involved in the rotation of the photoconductor. It is characterized by being configured of a transmitter and receiver that are provided specifically.
この発明の感光体の温度調節装置においては、感光体の
内面に設けられた温度変化検出手段が、感光体の温度変
化を直接検出してその形態を変化し、例えば、温度変化
検出手段の温度が所定温度未満であれば、投光器と受光
器との間の光路は遮断されないが、前記温度が所定温度
以上になると前記光路は遮断される。そして、前記光路
が遮断されない間は電熱式ヒータの電源回路は閉成され
たままであるが、光路が遮断されると前記電源回路は開
成され、電熱式ヒータへの給電が停止される。つまり、
投光器からの光が受光器に入射されたか否かに基づくだ
けで感光体の温度変化を検出することができ、この検出
に基づいて電熱式ヒータの発熱制御が行うことができ、
感光体の温度変化をきわめて簡単にしかも確実に検出す
ることができる。In the temperature control device of the photoconductor of the present invention, the temperature change detection means provided on the inner surface of the photoconductor directly detects the temperature change of the photoconductor and changes its form. If is less than the predetermined temperature, the optical path between the light projector and the light receiver is not blocked, but when the temperature is equal to or higher than the predetermined temperature, the optical path is blocked. Then, the power supply circuit of the electrothermal heater remains closed while the optical path is not cut off, but when the light path is cut off, the power supply circuit is opened and power supply to the electrothermal heater is stopped. That is,
The temperature change of the photoconductor can be detected only based on whether the light from the light projector is incident on the light receiver, and the heat generation control of the electrothermal heater can be performed based on this detection.
The temperature change of the photoconductor can be detected very easily and surely.
以下、この発明の詳細を、図を参照しながら説明する。 Hereinafter, details of the present invention will be described with reference to the drawings.
第１図は、画像記録装置の作像部を概略的に示すもの
で、この図において、１はAs-Se系材料よりなる感光体
で、その周囲には、帯電装置２、露光装置３、現像装置
４、転写装置５、複写紙分離装置６、クリーニング装置
７が、その順に感光体１の回転方向（図中矢印で示す）
に配設されている。FIG. 1 schematically shows an image forming unit of an image recording apparatus. In FIG. 1, reference numeral 1 is a photosensitive member made of an As—Se material, around which a charging device 2, an exposing device 3, The developing device 4, the transfer device 5, the copy paper separating device 6, and the cleaning device 7 are arranged in this order in the rotation direction of the photoconductor 1 (indicated by an arrow in the figure).
It is installed in.
そして、前記感光体１は、第２図に示すように、中空の
構造体であって、筒状の支軸８を連設したフランジ９を
両端に備えるとともに、前後の側板10にそれぞれ連設れ
た筒状の支持部材11にベアリング12を介して架設され、
一端側のギヤ部1aに噛合するギヤＧによって回転駆動さ
れるようになっている。As shown in FIG. 2, the photoconductor 1 is a hollow structure, and is provided with flanges 9 having cylindrical support shafts 8 continuously provided at both ends thereof, and is provided continuously with front and rear side plates 10. Is erected via a bearing 12 on a tubular support member 11
It is adapted to be rotationally driven by a gear G meshing with the gear portion 1a on one end side.
13は前記感光体１を所定の温度に調節するための温度調
節装置で、感光体１を内部から加熱する電熱式ヒータ14
と、感光体１の温度変化を基にして感光体１を所定の温
度に維持するヒータ制御手段15とからなる。そして、電
熱式ヒータ14は、感光体１の回転に関与されることな
く、前記前後の側板10にそれぞれ連設されたブラケット
16に固定的に設けられている。なお、ａは給電端子であ
る。Reference numeral 13 denotes a temperature adjusting device for adjusting the temperature of the photoconductor 1 to a predetermined temperature, which is an electrothermal heater 14 for heating the photoconductor 1 from the inside.
And a heater control means 15 for maintaining the photoconductor 1 at a predetermined temperature based on the temperature change of the photoconductor 1. The electrothermal heater 14 is a bracket that is continuously provided on the front and rear side plates 10 without being involved in the rotation of the photoconductor 1.
It is fixedly provided at 16. In addition, a is a power supply terminal.
また、前記ヒータ制御手段15は、前記感光体１の温度変
化を直接検出して形態的に変化する温度変化検出手段17
と、この温度変化検出手段17の形態的変化を間接的に検
出して前記電熱式ヒータ14の電源回路18を開閉する電源
回路制御手段19とからなる。Further, the heater control means 15 directly detects the temperature change of the photoconductor 1 and morphologically changes the temperature change detection means 17
And a power supply circuit control means 19 for indirectly opening and closing the power supply circuit 18 of the electrothermal heater 14 by indirectly detecting the morphological change of the temperature change detecting means 17.
そして、この実施例においては、前記温度変化検出手段
17は、一端側が感光体１の内面に固定的に設けられたバ
イメタルからなり、昇温に伴って遊端側が感光体１の内
面から離間するように材料選択されている。In this embodiment, the temperature change detecting means
The one end 17 is made of bimetal fixedly provided on the inner surface of the photoconductor 1, and the material is selected so that the free end side is separated from the inner surface of the photoconductor 1 as the temperature rises.
また、前記電源回路制御手段19は、次のように構成され
ている。すなわち、20は前記感光体１の内部で、かつ前
後の側板10を連結するように固定的に設けられる支持体
で、この支持体20には、例えばLED（発光ダイオード）
などの投光器21と例えばホトトランジスタなどの受光器
22とが、前記バイメタル17が所定温度以上に昇温したと
きの形態的変化によって投光器21から受光器22に至る光
路Ｒが遮断されるように、バイメタル17の両側に位置す
る状態で取り付けられている。そして、23は感光体１の
一回転ごとに前記光路Ｒが遮断されていることに基づい
て前記電源回路18を開成させる制御部である。Further, the power supply circuit control means 19 is configured as follows. That is, 20 is a support body fixedly provided inside the photoreceptor 1 so as to connect the front and rear side plates 10, and the support body 20 includes, for example, an LED (light emitting diode).
Such as a light emitter 21 and a light receiver such as a phototransistor
22 are mounted on both sides of the bimetal 17 so that the optical path R from the light emitter 21 to the light receiver 22 is blocked by a morphological change when the temperature of the bimetal 17 rises above a predetermined temperature. There is. Reference numeral 23 is a control unit that opens the power supply circuit 18 based on the fact that the optical path R is interrupted every one rotation of the photoconductor 1.
上述のように構成された感光体の温度調節装置において
は、感光体１の内面に設けられたバイメタル17が、感光
体１の温度変化を直接検出してその形態を変化し、バイ
メタル17の温度が所定温度未満であれば、投光器21と受
光器22との間の光路Ｒは遮断されないが、前記温度が所
定温度以上になると前記光路は遮断される。そして、前
記光路Ｒが遮断されない間は電熱式ヒータ14の電源回路
18は閉成されたままであるが、光路Ｒが遮断されると電
源回路18は開成され、電熱式ヒータ14への給電が停止さ
れる。つまり、投光器21からの光が受光器22に入射され
たか否かに基づくだけで感光体１の温度変化を検出する
ことができ、この検出に基づいて電熱式ヒータ14の発熱
制御が行うことができる。In the temperature control device of the photoconductor configured as described above, the bimetal 17 provided on the inner surface of the photoconductor 1 directly detects the temperature change of the photoconductor 1 to change its form, and the temperature of the bimetal 17 is changed. Is less than the predetermined temperature, the optical path R between the light projector 21 and the light receiver 22 is not blocked, but when the temperature becomes equal to or higher than the predetermined temperature, the optical path is blocked. The power supply circuit of the electrothermal heater 14 is provided while the optical path R is not interrupted.
Although 18 is still closed, when the optical path R is cut off, the power supply circuit 18 is opened and the power supply to the electrothermal heater 14 is stopped. That is, the temperature change of the photoconductor 1 can be detected only based on whether the light from the light projector 21 is incident on the light receiver 22, and the heat generation control of the electrothermal heater 14 can be performed based on this detection. it can.
したがって、感光体１の温度を応答性よく制御できると
ともに、制御対象である感光体１の温度が機内の空気の
流れや温度にはほとんど左右されることがないから、精
度のよい温度制御が行われる。Therefore, the temperature of the photoconductor 1 can be controlled with good responsiveness, and the temperature of the photoconductor 1 to be controlled is hardly influenced by the flow and temperature of the air in the machine. Therefore, accurate temperature control can be performed. Be seen.
上述の実施例においては、感光体１の温度変化を直接検
出してその形態を変化する温度変化検出手段17としてバ
イメタルを用いているが、これに代えて、所謂形状記憶
合金を用いてもよい。In the above-mentioned embodiment, the bimetal is used as the temperature change detecting means 17 which directly detects the temperature change of the photoconductor 1 and changes its form, but instead of this, a so-called shape memory alloy may be used. .
上述したように、この発明の感光体の温度調節装置は、
中空の感光体を内部から加熱する電熱式ヒータの制御手
段を、感光体の内面にこれと一体的に回転するように設
けられ、これの温度変化を直接検出して形態的に変化す
る温度変化検出手段と、この温度変化検出手段の形態的
変化を間接的に検出して電熱式ヒータの電源回路を開閉
する電源回路制御手段によって構成し、さらに、この電
源回路制御手段を、温度変化検出手段の変態によって光
路が断続されるように温度変化検出手段の両側に対向配
置され、感光体の回転に関与されることなく固定的に設
けられている投光器と受光器とから構成している。As described above, the temperature control device for the photoconductor of the present invention is
An electrothermal heater control means for heating the hollow photoconductor from the inside is provided on the inner surface of the photoconductor so as to rotate integrally therewith, and a temperature change that morphologically changes by directly detecting the temperature change. The temperature change detecting means and the power supply circuit control means for indirectly detecting the morphological change of the temperature change detecting means to open and close the power supply circuit of the electrothermal heater. Of the temperature change detecting means so that the optical path is interrupted by the transformation of the photosensor, and is composed of a light emitter and a light receiver which are fixedly provided without being involved in the rotation of the photoconductor.
したがって、この発明においては、投光器からの光が受
光器に入射されたか否かに基づくだけで感光体の温度変
化を検出することができ、この検出に基づいて電熱式ヒ
ータの発熱制御が行うことができ、感光体の温度変化を
きわめて簡単にしかも確実に検出することができる。Therefore, in the present invention, the temperature change of the photoconductor can be detected only based on whether or not the light from the light projector is incident on the light receiver, and the heat generation control of the electrothermal heater is performed based on this detection. The temperature change of the photoconductor can be detected very easily and surely.
そして、電熱式ヒータの電源回路を開閉するための電源
回路制御手段を感光体の回転に関与されることなく固定
的に設けてあるので、従来のように、制御ノイズを発生
したりするおそれがないとともに、感光体が回転駆動さ
れる状態において、感光体の一回転ごとに所定の位置に
おいて感光体の温度変化を検出することができ、感光体
の温度変化を正確かつ誤差なく検出することができる。Further, since the power supply circuit control means for opening and closing the power supply circuit of the electrothermal heater is fixedly provided without being involved in the rotation of the photoconductor, there is a possibility that control noise is generated as in the conventional case. In addition, the temperature change of the photoconductor can be detected at a predetermined position for each rotation of the photoconductor when the photoconductor is rotationally driven, and the temperature change of the photoconductor can be detected accurately and without error. it can.
このように、この発明によれば、感光体の温度調節を高
精度でしかも応答性よく行うことができる。As described above, according to the present invention, the temperature of the photoconductor can be adjusted with high accuracy and high responsiveness.
第１図および第２図はこの発明の一実施例を示し、第１
図は、この発明の感光体の温度調節装置を組み込んだ作
像部の概略断面図、第２図は前記感光体の要部構成を示
す断面図である。 １……感光体、14……電熱式ヒータ、15……ヒータ制御
手段、17……温度変化検出手段、18……電源回路、19…
…電源回路制御手段、21……投光器、22……受光器、Ｒ
……光路。1 and 2 show an embodiment of the present invention.
FIG. 1 is a schematic cross-sectional view of an image forming unit incorporating a photoconductor temperature control device of the present invention, and FIG. 2 is a cross-sectional view showing the essential structure of the photoconductor. 1 ... Photoconductor, 14 ... Electrothermal heater, 15 ... Heater control means, 17 ... Temperature change detecting means, 18 ... Power supply circuit, 19 ...
... Power supply circuit control means, 21 ... Emitter, 22 ... Receiver, R
...... Optical path.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小垣 新治 大阪府大阪市東区玉造１丁目２番28号 三 田工業株式会社内 (72)発明者 遠藤 英輝 大阪府大阪市東区玉造１丁目２番28号 三 田工業株式会社内 (56)参考文献 特開 昭58−143368（ＪＰ，Ａ) 特開 昭58−117578（ＪＰ，Ａ) 実開 昭60−11363（ＪＰ，Ｕ) 実開 昭56−127646（ＪＰ，Ｕ) 実開 昭55−150424（ＪＰ，Ｕ) 特公 昭51−4536（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinji Ogaki 1-2-2 Tamatsukuri, Higashi-ku, Osaka-shi, Osaka Mita Industrial Co., Ltd. (72) Hideki Endo 1-2-chome Tamatsukuri, Higashi-ku, Osaka-shi, Osaka No. 28 within Mita Kogyo Co., Ltd. (56) Reference JP-A-58-143368 (JP, A) JP-A-58-117578 (JP, A) Actual development S60-11363 (JP, U) Actual development S-56 -127646 (JP, U) Actually open 55-150424 (JP, U) Japanese Patent Sho 51-4536 (JP, B2)
Claims (1)
ータを、感光体の回転に関与されることなく固定的に設
けるとともに、感光体の温度変化を基にして感光体を所
定の温度に維持するヒータ制御手段を設けた感光体の温
度調節装置において、前記ヒータ制御手段を、前記感光
体の内面にこれと一体的に回転するように設けられ、こ
れの温度変化を直接検出して形態的に変化する温度変化
検出手段と、この温度変化検出手段の形態的変化を間接
的に検出して前記電熱式ヒータの電源回路を開閉する電
源回路制御手段とによって構成し、さらに、この電源回
路制御手段を、前記温度変化検出手段の変態によって光
路が断続されるように温度変化検出手段の両側に対向配
置され、感光体の回転に関与されることなく固定的に設
けられている投光器と受光器とから構成したことを特徴
とする感光体の温度調節装置。1. An electrothermal heater for heating a hollow photosensitive member from the inside is fixedly provided without being involved in the rotation of the photosensitive member, and the photosensitive member has a predetermined temperature based on a temperature change of the photosensitive member. In the temperature control device of the photoconductor provided with the heater control means for maintaining the heater control means, the heater control means is provided on the inner surface of the photoconductor so as to rotate integrally therewith, and the temperature change thereof is directly detected. It comprises a temperature change detecting means that changes in form and a power supply circuit control means that opens and closes the power supply circuit of the electrothermal heater by indirectly detecting the change in form of the temperature change detecting means. The circuit control means is disposed so as to face each other on both sides of the temperature change detection means so that the optical path is interrupted by the transformation of the temperature change detection means, and is fixedly provided without being involved in the rotation of the photoconductor. It was composed of a and receiver photoreceptor temperature control apparatus according to claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61224165A JPH0785188B2 (en) | 1986-09-22 | 1986-09-22 | Photoconductor temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61224165A JPH0785188B2 (en) | 1986-09-22 | 1986-09-22 | Photoconductor temperature control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6378190A JPS6378190A (en) | 1988-04-08 |
| JPH0785188B2 true JPH0785188B2 (en) | 1995-09-13 |
Family
ID=16809546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61224165A Expired - Lifetime JPH0785188B2 (en) | 1986-09-22 | 1986-09-22 | Photoconductor temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785188B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58143368A (en) * | 1982-02-22 | 1983-08-25 | Ricoh Co Ltd | Heating device of photosensitive drum |
| JPS6011363U (en) * | 1983-06-30 | 1985-01-25 | 京セラミタ株式会社 | Photoreceptor temperature control device |
-
1986
- 1986-09-22 JP JP61224165A patent/JPH0785188B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6378190A (en) | 1988-04-08 |
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