JPH08697Y2 - Electrophotographic equipment - Google Patents
Electrophotographic equipmentInfo
- Publication number
- JPH08697Y2 JPH08697Y2 JP1986195581U JP19558186U JPH08697Y2 JP H08697 Y2 JPH08697 Y2 JP H08697Y2 JP 1986195581 U JP1986195581 U JP 1986195581U JP 19558186 U JP19558186 U JP 19558186U JP H08697 Y2 JPH08697 Y2 JP H08697Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- photoconductor
- fixing
- set temperature
- 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
Landscapes
- Fixing For Electrophotography (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
【考案の詳細な説明】 ［考案の利用分野］ 本考案は、電子写真装置に関し、特に感光体の温度を
設定温度に制御するための手段を備えた電子写真装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to an electrophotographic apparatus, and more particularly to an electrophotographic apparatus provided with means for controlling the temperature of a photoconductor to a preset temperature.
［考案の背景］ 従来この種の装置は、温度特性の大きい感光体を使用
した電子写真装置において、使用時に感光体の温度を一
定の温度に保ち常に同一の特性のもとで安定した画像を
形成することを目的として、また、高湿時には感光体の
画像形成能力が著しく劣るため感光体の温度を室温より
高い温度に保持し感光体表面を乾燥した状態にすること
によって、感光体の安定した画像形成を行なうことを目
的として、設けられている。[Background of the Invention] Conventionally, in this type of device, in an electrophotographic device using a photoconductor having a large temperature characteristic, the temperature of the photoconductor is kept at a constant temperature during use, and a stable image is always produced under the same characteristic. Stabilization of the photoconductor by keeping the temperature of the photoconductor higher than room temperature and keeping the photoconductor surface in a dry state because the image forming ability of the photoconductor is remarkably poor at high humidity. It is provided for the purpose of performing the image formation.
従来この種の装置では、感光体の温度を40℃前後の設
定温度に保持している。これは、感光体の温度を常に室
温より高い温度に設定することで、冷却手段を必要とせ
ず、ヒーターの通電制御のみで感光体の温度制御を可能
にするためと同時に、感光体表面の相対湿度を常に50％
以下にするためである。さらに、従来この種の装置には
前述のように感光体の温度を40℃前後に保つために、50
W前後の比較的小出力のヒーターが用いられていた。し
かし、これでは感光体の基板材料の熱容量が大きい場合
（例えば、肉厚5mmのアルミニウム）には電子写真装置
の始動時に感光体の温度を短時間で室温から設定温度ま
で昇音させるのは困難で、感光体の温度が設定温度にな
るまでに約10分間の時間を必要とし始動時から約10分間
は、感光体の温度特性と湿度特性のため画質が安定せ
ず、劣悪な画像しか得られないという欠点があった。Conventionally, in this type of apparatus, the temperature of the photoconductor is kept at a set temperature of around 40 ° C. This is because the temperature of the photoconductor is always set higher than room temperature so that the cooling means is not required and the temperature of the photoconductor can be controlled only by controlling the energization of the heater. Humidity is always 50%
This is because Furthermore, in order to keep the temperature of the photoconductor at around 40 ° C.
A relatively small output heater around W was used. However, this makes it difficult to raise the temperature of the photoconductor from room temperature to the set temperature in a short time when the electrophotographic apparatus is started when the heat capacity of the substrate material of the photoconductor is large (for example, aluminum with a thickness of 5 mm). Therefore, it takes about 10 minutes for the temperature of the photoconductor to reach the set temperature, and for about 10 minutes from the start, the image quality is not stable due to the temperature and humidity characteristics of the photoconductor, and only poor images are obtained. There was a drawback that I could not do it.
また、他の従来例として大出力のヒーターを使用する
ものであるが、これは感光体を昇温した後、この大出力
のヒーターで感光体の温度制御をしなければならないも
のであった。しかし、大出力ヒーターで室温との差が10
〜20℃の温度で精密な温度制御をすることはヒーターの
オーバーシュート等から感光体温度に第５図で示すよう
な大きなリップルを発生し画像の安定性を確保できない
という恐れがあった。また、単純に感光体昇温用ヒータ
ーを大出力にすることは電子写真装置の全消費電力を増
大させるという欠点があった。Further, as another conventional example, a high output heater is used, but this requires heating the photosensitive member and then controlling the temperature of the photosensitive member with this large output heater. However, with a high-power heater, the difference from room temperature is 10
If the temperature is precisely controlled at a temperature of up to 20 ° C., there is a possibility that a large ripple as shown in FIG. Further, there is a drawback that simply increasing the heater for raising the temperature of the photoconductor increases the total power consumption of the electrophotographic apparatus.
［考案の目的］ 本考案の目的は、上述の従来の欠点を除去し、電子写
真装置の始動時には、速かに感光体を設定温度まで昇温
させ、その後は、感光体の温度を精密に設定温度に保持
することによって、常に安定した画像を得ることができ
る電子写真装置を提供することにある。[Object of the Invention] The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to quickly raise the temperature of the photoconductor to a set temperature at the time of starting the electrophotographic apparatus, and then to precisely control the temperature of the photoconductor. An object of the present invention is to provide an electrophotographic apparatus that can always obtain a stable image by keeping the temperature at a set temperature.
［考案の概要］ 上記目的を達成するため、本考案による電子写真装置
は、感光体と、この感光体を加熱する第１ヒーター及び
この第１ヒーターよりも大出力の第２ヒーターと、この
第２ヒーターより大出力の定着ヒーターを有する定着手
段と、装置の始動に際し、前記感光体の温度が所定の設
定温度に達するまでは、前記定着ヒーターの通電を低電
力とし、かつ、少なくとも前記第２ヒーターをオンし、
前記設定温度に達した後は、前記定着ヒーターの通電を
高電力とし、かつ、感光体の温度を前記設定温度に保つ
ため、前記第１ヒーターのみをオン、オフ制御する制御
手段と、を備えたことを特徴とする。[Summary of the Invention] In order to achieve the above object, an electrophotographic apparatus according to the present invention includes a photoconductor, a first heater for heating the photoconductor, a second heater having a larger output than the first heater, and a second heater. A fixing unit having a fixing heater having a larger output than the two heaters, and at the time of starting the apparatus, the fixing heater is energized at low power until the temperature of the photosensitive member reaches a predetermined set temperature, and at least the second heater is used. Turn on the heater,
After the preset temperature is reached, the fixing heater is energized to a high electric power, and the control means for controlling only the first heater to be turned on and off in order to keep the temperature of the photoconductor at the preset temperature. It is characterized by that.
［考案の実施例］ 第１図は本考案の実施例に用いた感光体用ヒーターの
展開図を示したものであり、マイラー，シリコンゴム，
プラスチック等の変形可能な絶縁材で形成された絶縁材
シート１内に、ニクロム，ステンレス等の導電性材で形
成した発熱材料のパターン２および３がある。パターン
２は大出力ヒーターとしてのパターンであり、パターン
３は小出力ヒーターとしてのパターンである。該二種類
のヒーター（これをH1，H2とを表わす）のパターンが形
成された面状ヒーター10は、第２図に示したように、円
筒状に曲げられて感光体ドラム５の中に納められてい
る。小出力ヒーターの出力は感光体ドラムを設定温度
（44℃）に保つに必要な限度での比較的小出力（50W）
であり、大出力ヒーターの出力は感光体ドラムを室温か
ら設定温度まで短時間で昇温させるに足る大出力（200
W）である。感光体ドラム５の温度は感光体ドラム５の
内面に設定された温度センサー６によって検知し、感光
体ドラム５の温度に応じて感光体ドラムの内部に設けた
温度制御装置７で大出力ヒーター２と小出力ヒーター３
の通電の制御を行なう。第８図はその回路ブロック図で
ある。[Embodiment of the Invention] FIG. 1 is a development view of the heater for the photoconductor used in the embodiment of the present invention.
In an insulating material sheet 1 formed of a deformable insulating material such as plastic, there are patterns 2 and 3 of a heat generating material formed of a conductive material such as nichrome or stainless steel. Pattern 2 is a pattern as a large output heater, and pattern 3 is a pattern as a small output heater. As shown in FIG. 2, the planar heater 10 on which the pattern of the two kinds of heaters (which represent H 1 and H 2 ) is formed, is bent into a cylindrical shape as shown in FIG. Is stored in. The output of the small output heater is relatively small (50W) within the limit necessary to keep the photosensitive drum at the set temperature (44 ° C).
The output of the large output heater is large enough to raise the photosensitive drum from room temperature to the set temperature in a short time (200
W). The temperature of the photoconductor drum 5 is detected by a temperature sensor 6 set on the inner surface of the photoconductor drum 5, and the high output heater 2 is controlled by a temperature control device 7 provided inside the photoconductor drum 5 according to the temperature of the photoconductor drum 5. And small output heater 3
Control the energization of. FIG. 8 is a circuit block diagram thereof.
第３図は上記構成を有する本考案実施例における温度
制御の概略を示した図である。まず、始動時には大出力
ヒーター２と小出力ヒーター３の両方に通電して感光体
ドラム５の温度を急速に立ち上げ、その温度が設定温度
の44℃になり次第、大出力ヒーター２への通電は中止し
て、その後は小出力ヒーター３のみのオンオフ制御で感
光体ドラム５の温度を設定温度に保つ。第７図はその制
御フロー図である。これに対し第４図は、始動時から小
出力ヒーター３のみで昇温をした場合の、また第５図は
設定温度到達後も大出力ヒーターのオンオフ制御をした
場合の、感光体ドラム５の温度を示したものである。第
３図，第４図，第５図を比較して見てもわかるように、
本考案を実施することにより感光体ドラム５の温度を短
時間に設定温度まで昇温し、しかもその後の温度制御も
非常に精密に行なうことが可能となる。FIG. 3 is a diagram showing an outline of temperature control in the embodiment of the present invention having the above-mentioned configuration. First, at the time of start-up, both the large output heater 2 and the small output heater 3 are energized to rapidly raise the temperature of the photosensitive drum 5, and as soon as the temperature reaches the set temperature of 44 ° C, the large output heater 2 is energized. Is stopped, and thereafter, the temperature of the photosensitive drum 5 is maintained at the set temperature by the on / off control of only the small output heater 3. FIG. 7 is a control flow chart thereof. On the other hand, FIG. 4 shows the photosensitive drum 5 when the temperature is raised only by the small output heater 3 from the start, and FIG. 5 shows the case where the large output heater is turned on and off even after the set temperature is reached. It shows the temperature. As can be seen by comparing FIGS. 3, 4, and 5,
By carrying out the present invention, it becomes possible to raise the temperature of the photosensitive drum 5 to the set temperature in a short time, and also to control the temperature thereafter very precisely.
大出力ヒーターの電力は、第６図に示すように電子写
真装置の定着器の昇温に割りあてられている電力の一部
を使用するのがよい。これによって定着器の昇温が僅か
ではあるが遅れることになるが、小出力ヒーターのみで
感光体を昇温した場合に比べれば非常に小さいものとな
る。As the electric power of the high output heater, it is preferable to use a part of the electric power allocated to the temperature rise of the fixing device of the electrophotographic apparatus as shown in FIG. As a result, the temperature rise of the fixing device is slightly delayed, but it is very small as compared with the case where the temperature of the photoconductor is raised only by the small output heater.
以上述べたように、始動時のみ大出力ヒーターと、小
出力ヒーターの両方で、感光体を昇温させることにより
約５分間足らずの短時間で、感光体の温度を設定温度に
まで昇温させることが可能になる。従来の電子写真装置
では、始動開始時から約５分間前後は、定着器の昇温の
ためにコピー動作が行えないので、前述のように約５分
間で感光体の温度を設定温度にすることで、定着器昇温
が終了した直後から感光体の温度特性、湿度特性に影響
を受けることなく、常に安定した良好な画質の画像を得
ることが可能となった。As described above, the temperature of the photoconductor is raised to the set temperature in a short time of less than about 5 minutes by raising the temperature of the photoconductor by using both the high power heater and the low power heater only at the time of starting. It will be possible. In the conventional electrophotographic apparatus, the copy operation cannot be performed for about 5 minutes from the start of the start-up due to the temperature rise of the fixing device. Therefore, as described above, the temperature of the photoconductor should be set to the set temperature in about 5 minutes. Thus, immediately after the temperature rise of the fixing device is completed, it is possible to always obtain a stable image of good quality without being affected by the temperature characteristic and the humidity characteristic of the photoconductor.
上記実施例では、感光体ドラムの昇温と温度制御に面
状ヒーターを用いたが、それ以外の形状のヒーターを用
いても同様の効果を得ることが可能である。また大出力
ヒーターの出力が充分に大きい場合は、始動時の昇温の
際に大小両方のヒーターに通電する必要はなく大出力ヒ
ーターのみの通電で感光体ドラムの昇温を行なっても同
様の効果が得られる。In the above embodiment, the planar heater is used for temperature rise and temperature control of the photoconductor drum, but the same effect can be obtained by using a heater of other shape. Also, if the output of the large output heater is sufficiently large, it is not necessary to energize both large and small heaters at the time of temperature rise at the time of starting, and the same result can be obtained even if the photosensitive drum is heated by energizing only the large output heater. The effect is obtained.
［考案の効果］ 以上説明したように、感光体の温度を設定温度まで昇
温する時には、大出力ヒーター又は大出力ヒーターと小
出力ヒーターとの両方で加熱し、設定温度まで昇温した
後は、小出力ヒーターのみで感光体の温度保持を行なう
構成をとることによって、感光体の温度をすみやかに設
定温度に昇温する同様に、その後の感光体の温度を設定
温度から大きくはずれることなく、保持することが可能
となり、常に同一の感光体の特性で、安定した画像を得
ることが可能となる。[Advantages of the Invention] As described above, when the temperature of the photoconductor is raised to the set temperature, the photoconductor is heated by the large output heater or both the large output heater and the small output heater, and after the temperature is raised to the set temperature, By holding the temperature of the photoconductor only with the small output heater, the temperature of the photoconductor is quickly raised to the set temperature, and the temperature of the photoconductor thereafter does not largely deviate from the set temperature. It is possible to hold the image, and it is possible to always obtain a stable image with the same characteristics of the photoconductor.
また、装置の消費電力を大きくすることなく短時間で
感光体の設定温度に昇温させることができると共に、設
定温度到達後は定着ヒーターに高電力を供給し、装置全
体のウォームアップタイムの増加時間を抑えることがで
きる。In addition, the temperature can be raised to the set temperature of the photoconductor in a short time without increasing the power consumption of the device, and after the set temperature is reached, high power is supplied to the fixing heater to increase the warm-up time of the entire device. You can save time.
第１図は本考案の実施例に用いた感光体ヒーターの概略
展開図、第２図は同感光体ヒーターの感光体ドラムへの
着装状態を示した図、第３図は本考案を実施した場合の
感光体ドラムの温度を示した図、第４図，第５図は比較
例の感光体ドラムの温度を示した図、第６図は本考案の
実施例における定着器と感光体ヒーターとの動作関係を
示す図、第７図は本考案の実施例の制御フロー図、第８
図は同じく回路ブロック図である。 1;絶縁シート,2;大出力ヒーター,3;小出力ヒーター,5;
感光体ドラム,6;温度センサー,7;温度制御器,10;感光体
用面状ヒーター。FIG. 1 is a schematic development view of a photoconductor heater used in an embodiment of the present invention, FIG. 2 is a view showing how the photoconductor heater is attached to a photoconductor drum, and FIG. FIG. 4 is a diagram showing the temperature of the photosensitive drum in the case, FIGS. 4 and 5 are diagrams showing the temperature of the photosensitive drum of the comparative example, and FIG. 6 is a diagram showing the fixing device and the photosensitive heater in the embodiment of the present invention. Showing the operational relationship of FIG. 7, FIG. 7 is a control flow chart of an embodiment of the present invention, and FIG.
The figure is also a circuit block diagram. 1; Insulation sheet, 2; High power heater, 3; Small power heater, 5;
Photoconductor drum, 6; Temperature sensor, 7; Temperature controller, 10; Sheet heater for photoconductor.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０３Ｇ 21/14 (56)参考文献 特開 昭58−95766（ＪＰ，Ａ) 特開 昭60−87377（ＪＰ，Ａ) 特開 昭58−130368（ＪＰ，Ａ) 特開 昭58−11977（ＪＰ，Ａ) 特開 昭52−127341（ＪＰ，Ａ) 特開 昭63−8773（ＪＰ，Ａ) 特開 昭57−164742（ＪＰ，Ａ) 特開 昭60−129772（ＪＰ，Ａ) 特開 昭63−64060（ＪＰ，Ａ) 特開 昭62−160477（ＪＰ，Ａ) 特開 昭57−8552（ＪＰ，Ａ) 特開 昭58−116544（ＪＰ，Ａ) 特開 昭58−114049（ＪＰ，Ａ) 特開 昭63−64059（ＪＰ，Ａ) 特開 昭63−64058（ＪＰ，Ａ) 実開 昭61−128714（ＪＰ，Ｕ) 特公 昭55−24104（ＪＰ，Ｂ２)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI Technical indication location G03G 21/14 (56) References JP 58-95766 (JP, A) JP 60- 87377 (JP, A) JP 58-130368 (JP, A) JP 58-11977 (JP, A) JP 52-127341 (JP, A) JP 63-8773 (JP, A) JP-A-57-164742 (JP, A) JP-A-60-129772 (JP, A) JP-A-63-64060 (JP, A) JP-A-62-160477 (JP, A) JP-A-57-8552 (JP, A) JP 58-116544 (JP, A) JP 58-114049 (JP, A) JP 63-64059 (JP, A) JP 63-64058 (JP, A) Actual Kai 61-128714 (JP, U) JP-B 55-24104 (JP, B2)
Claims (1)
ター及びこの第１ヒーターよりも大出力の第２ヒーター
と、 この第２ヒーターより大出力の定着ヒーターを有する定
着手段と、 装置の始動に際し、前記感光体の温度が所定の設定温度
に達するまでは、前記定着ヒーターの通電を低電力と
し、かつ、少なくとも前記第２ヒーターをオンし、前記
設定温度に達した後は、前記定着ヒーターの通電を高電
力とし、かつ、感光体の温度を前記設定温度に保つた
め、前記第１ヒーターのみをオン、オフ制御する制御手
段と、 を備えたことを特徴とする電子写真装置。1. A fixing unit comprising a photoconductor, a first heater for heating the photoconductor, a second heater having a larger output than the first heater, and a fixing heater having a larger output than the second heater. At the time of starting, until the temperature of the photoconductor reaches a predetermined set temperature, the fixing heater is energized at low power, and at least the second heater is turned on, and after reaching the set temperature, the An electrophotographic apparatus comprising: a control unit that controls ON / OFF of only the first heater in order to increase the power supply to the fixing heater and maintain the temperature of the photoconductor at the preset temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986195581U JPH08697Y2 (en) | 1986-12-19 | 1986-12-19 | Electrophotographic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986195581U JPH08697Y2 (en) | 1986-12-19 | 1986-12-19 | Electrophotographic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63100771U JPS63100771U (en) | 1988-06-30 |
| JPH08697Y2 true JPH08697Y2 (en) | 1996-01-10 |
Family
ID=31153598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986195581U Expired - Lifetime JPH08697Y2 (en) | 1986-12-19 | 1986-12-19 | Electrophotographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08697Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2731274B2 (en) * | 1990-01-12 | 1998-03-25 | キヤノン株式会社 | Temperature control method for inkjet recording head |
| JP2815959B2 (en) * | 1990-02-19 | 1998-10-27 | キヤノン株式会社 | Liquid jet recording device |
| US6394784B1 (en) * | 2000-03-08 | 2002-05-28 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5895766A (en) * | 1981-12-03 | 1983-06-07 | Ricoh Co Ltd | Heating method of photosensitive body |
| JPS6087377A (en) * | 1983-10-20 | 1985-05-17 | Canon Inc | Heat fixing device |
| JPH0648522Y2 (en) * | 1985-01-30 | 1994-12-12 | 富士ゼロックス株式会社 | Condensation prevention device |
-
1986
- 1986-12-19 JP JP1986195581U patent/JPH08697Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63100771U (en) | 1988-06-30 |
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