JPS6117922A - Temperature detector - Google Patents
Temperature detectorInfo
- Publication number
- JPS6117922A JPS6117922A JP13727884A JP13727884A JPS6117922A JP S6117922 A JPS6117922 A JP S6117922A JP 13727884 A JP13727884 A JP 13727884A JP 13727884 A JP13727884 A JP 13727884A JP S6117922 A JPS6117922 A JP S6117922A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- temperature sensing
- fixing roller
- sensing element
- temperature detection
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
- G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は複写機の定着ローラーのローラー表面温度の検
知等に用いられる温度検知装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a temperature detection device used for detecting the roller surface temperature of a fixing roller of a copying machine.
（従来例の構成とその問題点）
複写機には、紙に転写された像を定着させるための発熱
体をもつ定着ローラーが備えられており、この定着ロー
ラーの温度は、コピーの速さ、像の鮮明さ等に大きな影
響を与える。そのためこのロ−ラ一温度検知のために現
在まで様々な方法が検討され、実用化されているが、コ
ピー速度、鮮明度向上のため、さらに検温精度の要求が
出されている。また、同一の温度検知素子を用いてもそ
の取付は方法、使用方法により、定着ローラーの温度検
知精度が異なることが指摘されている。(Conventional structure and its problems) A copying machine is equipped with a fixing roller that has a heating element to fix the image transferred to paper, and the temperature of this fixing roller depends on the speed of copying, This has a large effect on the clarity of the image. For this reason, various methods have been studied and put into practical use to date to detect the temperature of the roller, but there has been a demand for higher temperature measurement accuracy in order to improve copying speed and clarity. Furthermore, it has been pointed out that even if the same temperature sensing element is used, the temperature sensing accuracy of the fixing roller differs depending on the mounting method and usage method.
以下、図面を参照しながら従来の構成例について説明す
る。Hereinafter, a conventional configuration example will be described with reference to the drawings.
第１図は非接触型の温度検知装置の構成例である。第１
図において、１は定着ローラー、２は発熱体、３は温度
検知素子、４は温度検知素子からのリード線であり、温
度検知素子は定着ローラーに接触しないように設けられ
ている。FIG. 1 shows an example of the configuration of a non-contact temperature sensing device. 1st
In the figure, 1 is a fixing roller, 2 is a heating element, 3 is a temperature sensing element, and 4 is a lead wire from the temperature sensing element, and the temperature sensing element is provided so as not to come into contact with the fixing roller.
以上のように構成された温度検知装置について以下その
動作について説明する。第１図１の定着ローラーは同図
２の発熱体により加熱される。一方、定着ローラーの温
度は同図３の温度検知素子により検出され、その検出温
度により、発熱体の発熱量が制御され、定着ローラーの
温度がほぼ一定になる。The operation of the temperature detection device configured as described above will be explained below. The fixing roller shown in FIG. 1 is heated by the heating element shown in FIG. 2. On the other hand, the temperature of the fixing roller is detected by the temperature detecting element shown in FIG. 3, and the amount of heat generated by the heating element is controlled based on the detected temperature, so that the temperature of the fixing roller becomes approximately constant.
しかしながら上記のような構成では、以下の欠点がある
。まず第一に温度検知素子が定着ローラーから離れてい
るため、定着ローラーの温度と温度検知素子の温度とが
異なり、この相関を取らなければならない。また、この
温度差は周囲温度、風速などにより影響をうけ、相関を
取ることは非常に難しい。第２に温度検知素子が熱容量
をもっているため、定着ローラーの温度変化点と温度検
知素子の温度変化点が異なるという時間遅れの現象が見
られる。以上のような要因により前記構成では温度検知
精度が劣る。However, the above configuration has the following drawbacks. First of all, since the temperature sensing element is separated from the fixing roller, the temperature of the fixing roller and the temperature of the temperature sensing element are different, and this correlation must be established. Furthermore, this temperature difference is affected by the ambient temperature, wind speed, etc., and it is extremely difficult to establish a correlation. Second, since the temperature sensing element has a heat capacity, a time lag phenomenon occurs in which the temperature change point of the fixing roller and the temperature change point of the temperature sensing element are different. Due to the above-mentioned factors, the temperature detection accuracy is inferior in the above configuration.
第２図は接触型の温度検知装置の構成例である。FIG. 2 shows an example of the configuration of a contact type temperature sensing device.
第１図の非接触型温度検知装置と異なる点は温度検知素
子が定着ローラーに接触して設けられていることである
。この接触型温度検知装置は、非接触型の有する前記欠
点、すなわち定着ローラーの温度と温度検知素子の温度
が異なる、時間遅れが生じるという点を改善しているが
、完全なものとはなっていない。また、温度検知素子か
定着ローラーに接触しているため、温度検知素子が定着
ローラーのどちらかに摩耗が生じ、温度検知素子の信頼
性に問題が残っている。The difference from the non-contact type temperature sensing device shown in FIG. 1 is that the temperature sensing element is provided in contact with the fixing roller. Although this contact type temperature sensing device improves the disadvantages of the non-contact type, namely, the temperature of the fixing roller and the temperature of the temperature sensing element are different and the time delay occurs, it is not perfect. do not have. Furthermore, since the temperature sensing element is in contact with either the fixing roller, the temperature sensing element wears out on either of the fixing rollers, and there remains a problem with the reliability of the temperature sensing element.
（発明の目的）
本発明は」二記欠点に鑑み、定着ローラーの温度を正確
に検出し、定着ローラーの温度制御の精度を向上させる
ことのできる温度検知装置を提供するものである。(Object of the Invention) In view of the above two drawbacks, the present invention provides a temperature detection device that can accurately detect the temperature of a fixing roller and improve the accuracy of temperature control of the fixing roller.
（発明の構成）
この目的を達成するために本発明の温度検知装置は、発
熱体を伴って回転する熱伝導体表面に設けられた温度検
知素子と前記熱伝導体の回転支持棒の同心円上に設けら
れた少なくとも１つ以上の円筒形電極及び前記温度検知
素子と前記円筒形電極を電気的に接続するリード線とを
一体的に構成することにより、上記熱伝導体の表面温度
を正確に検知することが可能となる。(Structure of the Invention) In order to achieve this object, the temperature sensing device of the present invention has a temperature sensing element provided on the surface of a thermal conductor that rotates with a heating element, and a temperature sensing element provided on a concentric circle of a rotating support rod of the thermal conductor. By integrally configuring at least one or more cylindrical electrodes provided on the cylindrical electrode and a lead wire electrically connecting the temperature sensing element and the cylindrical electrode, the surface temperature of the thermal conductor can be accurately measured. It becomes possible to detect.
（実施例の説明）
以下本発明の一実施例について、図面を参照しながら説
明する。(Description of Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
第３図は本発明の実施例における温度検出装置の構成を
示すものである。第３図の３１は定着ローラー、３２は
発熱体、３３は回転支持棒、３４は温度検知素子、３５
はリード線、３６は発熱体用電極、３７は温度検知用電
極、３８は外部取出用電極、３９は各電極及び回転支持
棒を絶縁する絶縁物である。FIG. 3 shows the configuration of a temperature detection device in an embodiment of the present invention. In FIG. 3, 31 is a fixing roller, 32 is a heating element, 33 is a rotating support rod, 34 is a temperature detection element, 35
36 is a lead wire, 36 is a heating element electrode, 37 is a temperature detection electrode, 38 is an external extraction electrode, and 39 is an insulator that insulates each electrode and the rotating support rod.
以上のように構成された温度検出装置について、以下そ
の動作を説明する。The operation of the temperature detection device configured as above will be described below.
まず第３図３３の回転支持棒により回転させられる同図
３１の定着ローラーは、同図３２の発熱体により加熱さ
れる。一方、同図３１の定着ローラーの温度は、同図３
４の温度検知素子により検出され、同図３５のリード線
を通し、定着ローラーの外部の同図３７の温度検知用電
極へと信号が伝えられ、同図３８の外部取出用電極を通
して、制御回路等へ信号が送られる。この実施例におい
ては、外部取出用電極としてブラシ電極を用いたが、ス
リップリング等で構成しても同様の効果が得られる。そ
して取出用電極からの信号により発熱体が制御され、定
着ローラーの温度が一定に保たれる。First, the fixing roller shown in FIG. 31, which is rotated by the rotating support rod shown in FIG. 33, is heated by the heating element shown in FIG. 32. On the other hand, the temperature of the fixing roller in FIG.
The signal is detected by the temperature sensing element 4, and is transmitted through the lead wire 35 to the temperature sensing electrode 37 outside the fixing roller, and then sent to the control circuit through the external electrode 38 shown in FIG. A signal is sent to etc. In this embodiment, a brush electrode was used as the external electrode, but the same effect can be obtained by using a slip ring or the like. The heating element is controlled by the signal from the take-out electrode, and the temperature of the fixing roller is kept constant.
第４図に発熱体０Ｎ−ＯＦＦ制御型定着ローラーを用い
て行った実験結果を示す。同図において４１は定着ロー
ラーの設定温度、４２は非接触型温度検知素子の温度、
４３は接触型温度検知素子の温度、４４は定着ローラー
の温度である。また１本発明による温度検出装置の温度
検知素子の温度は、定着ローラーの温度とほとんど同じ
であった。FIG. 4 shows the results of an experiment conducted using a heating element ON-OFF control type fixing roller. In the figure, 41 is the set temperature of the fixing roller, 42 is the temperature of the non-contact temperature sensing element,
43 is the temperature of the contact type temperature sensing element, and 44 is the temperature of the fixing roller. Furthermore, the temperature of the temperature sensing element of the temperature sensing device according to the present invention was almost the same as the temperature of the fixing roller.
第４図から明らかなように、本実施例によれば、温度検
知素子が定着ローラー表面に設けられているため、従来
の温度検出装置で見られた、定着ローラーと温度検知素
子との温度差がある、定着ローラーと温度検知素子の温
度に時間差がある、摩耗等による温度検知素子の信頼性
の低下がある、等の欠点が解消され、正確な温度検知が
でき、定着ローラーの温度制御精度を上げることが可能
である。As is clear from FIG. 4, according to this embodiment, since the temperature detection element is provided on the surface of the fixing roller, the temperature difference between the fixing roller and the temperature detection element is different from that seen in the conventional temperature detection device. This eliminates drawbacks such as the temperature difference between the temperature of the fusing roller and the temperature sensing element, and the reliability of the temperature sensing element decreasing due to wear etc., allowing accurate temperature detection and improving the temperature control accuracy of the fusing roller. It is possible to increase the
（発明の効果）
以上のように本発明は、発熱体を伴う回転する熱伝導体
表面に設けられた温度検知素子と前記熱伝導体の回転支
持棒の同心円上に設けられた少なくとも１つ以上の円筒
形電極及び前記温度検知素子と前記円筒形電極を電気的
に接続するリード線とを一体構成することにより、前記
熱伝導体表面の温度を正確に検知することができ、その
実用的効果は大なるものがある。(Effects of the Invention) As described above, the present invention provides at least one temperature sensing element provided on the surface of a rotating thermal conductor accompanied by a heating element and at least one temperature sensing element provided on a concentric circle of a rotating support rod of the thermal conductor. By integrally configuring the cylindrical electrode and the lead wire that electrically connects the temperature sensing element and the cylindrical electrode, the temperature on the surface of the heat conductor can be accurately detected, and its practical effects are There is something big about it.
第１図は従来の非接触型の温度検知装置の構成図、第２
図は従来の接触型の温度検知装置の構成図、第３図は本
発明による温度検知装置の一実施例を示す図、第４図は
前記各々の温度検知装置の温度検知素子の温度変化図で
ある。
■、３１・・・定着ローラー、 ２，３２・・・発熱体
、３．３４・・・温度検知素子、 ４，３５・・・ リ
ード線、３３・・・回転支持棒、３６・・・温度検知用
電極、３８・・・外部取出用電極、３９・・・絶縁物、
４１・・・定着ローラーの設定温度、４２・・・非接触
型温度検知装置の温度検知素子の温度、４３・・・接触
型温度検知装置の温度検知素子の温度、４４・・・定着
ローラーの温度及び本発明の温度検知装置の温度検知素
子の温度。
第１図
第２図
□軛翼Figure 1 is a configuration diagram of a conventional non-contact temperature detection device, Figure 2
Figure 3 is a diagram showing the configuration of a conventional contact type temperature sensing device, Figure 3 is a diagram showing an embodiment of the temperature sensing device according to the present invention, and Figure 4 is a diagram of temperature changes in the temperature sensing element of each of the temperature sensing devices. It is. ■, 31... Fixing roller, 2, 32... Heating element, 3.34... Temperature detection element, 4, 35... Lead wire, 33... Rotating support rod, 36... Temperature Detection electrode, 38... External extraction electrode, 39... Insulator,
41... Set temperature of the fixing roller, 42... Temperature of the temperature detection element of the non-contact type temperature detection device, 43... Temperature of the temperature detection element of the contact type temperature detection device, 44... Temperature of the temperature detection element of the contact type temperature detection device. Temperature and temperature of the temperature sensing element of the temperature sensing device of the present invention. Figure 1 Figure 2 □Yoke wings
Claims (1)
検知素子と、前記熱伝導体の回転支持棒の同心円上に設
けられた少なくとも１つ以上の円筒形電極及び前記温度
検知素子と前記円筒形電極とを電気的に接続するリード
線とを一体的に構成したことを特徴とする温度検知装置
。a temperature sensing element provided on the surface of a thermal conductor that rotates with a heating element; at least one cylindrical electrode provided on a concentric circle of a rotational support rod of the thermal conductor; and the temperature sensing element and the A temperature sensing device characterized by integrally comprising a cylindrical electrode and a lead wire that electrically connects the electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13727884A JPS6117922A (en) | 1984-07-04 | 1984-07-04 | Temperature detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13727884A JPS6117922A (en) | 1984-07-04 | 1984-07-04 | Temperature detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6117922A true JPS6117922A (en) | 1986-01-25 |
Family
ID=15194935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13727884A Pending JPS6117922A (en) | 1984-07-04 | 1984-07-04 | Temperature detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523998A2 (en) * | 1991-07-18 | 1993-01-20 | Du Pont De Nemours (Deutschland) Gmbh | Heat pipe roller and temperature sensor for use therein |
-
1984
- 1984-07-04 JP JP13727884A patent/JPS6117922A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523998A2 (en) * | 1991-07-18 | 1993-01-20 | Du Pont De Nemours (Deutschland) Gmbh | Heat pipe roller and temperature sensor for use therein |
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