JPS5850287Y2 - temperature sensing element - Google Patents
temperature sensing elementInfo
- Publication number
- JPS5850287Y2 JPS5850287Y2 JP1976170698U JP17069876U JPS5850287Y2 JP S5850287 Y2 JPS5850287 Y2 JP S5850287Y2 JP 1976170698 U JP1976170698 U JP 1976170698U JP 17069876 U JP17069876 U JP 17069876U JP S5850287 Y2 JPS5850287 Y2 JP S5850287Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heating roller
- thermistor
- thermocouple
- sensing element
- 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
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Fixing For Electrophotography (AREA)
Description
【考案の詳細な説明】
この考案は、複写機等のように加熱ローラの温度を基準
温度として他のヒータの温度を制御する場合に好適な温
度検知素子を接触させた複写機等の加熱ローラに関する
ものである。[Detailed description of the invention] This invention is a heating roller of a copying machine, etc., in which a temperature sensing element is brought into contact, which is suitable for controlling the temperature of other heaters using the temperature of the heating roller as a reference temperature, such as in a copying machine. It is related to.
従来、複写機等の加熱ローラの温度を基準温度として他
のヒータの温度を制御するものにおいては、加熱ローラ
の温度を制御するために加熱ローラの温度を検知するサ
ーミスタと、加熱ローラの温度を基準温度として他のヒ
ータの温度を制御するために必要な基準信号を得るため
の熱電対接点が別個に取付けられていた。Conventionally, in devices such as copying machines that use the temperature of the heating roller as a reference temperature to control the temperature of other heaters, a thermistor that detects the temperature of the heating roller and a thermistor that detects the temperature of the heating roller are used to control the temperature of the heating roller. Thermocouple contacts were installed separately to obtain the reference signal needed to control the temperature of the other heaters as a reference temperature.
このため、例えば、加熱ローラとサーミスタとの間に紙
片が進入すると、サーミスタが加熱ローラから離れるた
めサーミスタの温度が下り、見かけ上加熱ローラの温度
が降下したことになるため加熱ローラ温度制御装置が作
動して加熱ローラの温度を上昇させることになる。For this reason, for example, if a piece of paper enters between the heating roller and the thermistor, the thermistor will separate from the heating roller, causing the temperature of the thermistor to drop, which will cause the apparent temperature of the heating roller to drop, causing the heating roller temperature control device to This will cause the temperature of the heating roller to rise.
しかるに、他のヒータの温度を制御するための基準信号
を作る熱電対接合点は加熱ローラに接触しているので、
この熱電対接合点の温度が上昇し、このため他のヒータ
を過熱させるという不都合が生じていた。However, since the thermocouple junction that creates the reference signal for controlling the temperature of other heaters is in contact with the heating roller,
The temperature at this thermocouple junction increases, causing the other heaters to overheat.
この考案は、加熱ローラの温度を制御するために加熱ロ
ーラ温度を検知するためのサーミスタと、他のヒータの
温度を制御するための基準信号を作る熱電対接合点とが
常に同一の熱的環境に置かれるようにして、上述のよう
な不都合が生じないようにした温度検知素子を接触させ
た加熱ローラを提供することを目的とする。This device uses a thermistor to detect the heating roller temperature to control the temperature of the heating roller, and a thermocouple junction that creates a reference signal to control the temperature of other heaters, so that they are always in the same thermal environment. It is an object of the present invention to provide a heating roller in which a temperature sensing element is brought into contact so that the above-mentioned inconvenience does not occur.
次に、この考案の実施例について説明する。Next, an example of this invention will be described.
図において、１はサーミスタ、２は熱電対接合点である
。In the figure, 1 is a thermistor, and 2 is a thermocouple junction.
このサーミスタと熱電対とは可能な限り近接して配置さ
れており、そして、これらの外周面は熱伝導率が高く、
かつ、電気絶縁性の良好な材料、例えば、ガラス３でモ
ールドされている。The thermistor and thermocouple are placed as close as possible, and their outer surfaces have high thermal conductivity.
In addition, it is molded with a material having good electrical insulation properties, such as glass 3.
この場合、単にサーミスタ１と熱電対接合点２の部分だ
けをモールドするだけではなく、サーミスタのリード線
４および熱電対素線５とをそｉ’Ｌぞれに電気的に接触
することのないようにし、線方向にも成る程度の長さだ
け余分にモールドしておくとこの部分を取付用基体とし
て使用することができる。In this case, not only the thermistor 1 and the thermocouple junction 2 are molded, but also the thermistor lead wire 4 and the thermocouple element wire 5 are molded so that they do not come into electrical contact with each other. By molding an extra length that also extends in the linear direction, this portion can be used as a mounting base.
そして、サーミスタと熱電対接合点の部分におけるガラ
スは可能な限り少なくシ、他方リード線の部分には少し
多めにガラスを付着させておくと熱応答性が良好で、か
つ、取付ける際に損傷が生じにくい温度検知素子を作る
ことができる。In addition, it is best to minimize the amount of glass at the junction of the thermistor and thermocouple, while attaching a little more glass to the lead wires to ensure good thermal response and avoid damage during installation. It is possible to create a temperature sensing element that is unlikely to cause this.
また、温度検知部と取付基体部とを一直線とせずに、図
のように少し角度を持たせておくと加熱ローラとの接触
が円滑になる。Also, if the temperature sensing part and the mounting base part are not aligned in a straight line but are slightly angled as shown in the figure, the contact with the heating roller will be smooth.
サーミスタは温度により抵抗値が変る抵抗体であり、１
つのサーミスタについていえば温度と抵抗値は１対１の
対応がある。A thermistor is a resistor whose resistance value changes depending on the temperature.
For a thermistor, there is a one-to-one correspondence between temperature and resistance value.
そして工業的に利用する素子群では、その材料、製造条
件、素子のサイズなどのさまざまな要因により、温度と
抵抗値の関係は一定ではなく、ある一定温度のときの抵
抗値はバラツキをもっている。In devices used industrially, the relationship between temperature and resistance value is not constant due to various factors such as the material, manufacturing conditions, and size of the device, and the resistance value at a certain temperature varies.
一方熱電対は温度と電位差は一定ではなく、冷接点とそ
の熱電対の温度差に比例した電位差が発生し、この温度
差により発生する電位差は、熱電対を作る物質により決
まり、バラツキをもたない固有値である。On the other hand, in a thermocouple, the temperature and potential difference are not constant, but a potential difference is generated that is proportional to the temperature difference between the cold junction and the thermocouple.The potential difference generated by this temperature difference is determined by the material that makes the thermocouple, and has variations. There are no eigenvalues.
従って、サーミスタと熱電対とを一体化し、製品のバラ
ツキやすい素子であるサーミスタを１つの物体の温度検
知素子として使用し、安定な特性の熱電対を他の物体の
温度制御用として使用すれば、使用するサーミスタの特
性に応じて一度調整しておきさえすれば、常に安定した
他の物体の温度制御が可能となる。Therefore, if a thermistor and a thermocouple are integrated, and the thermistor, which is an element that tends to vary in products, is used as the temperature sensing element for one object, and the thermocouple with stable characteristics is used to control the temperature of another object, Once adjusted according to the characteristics of the thermistor used, stable temperature control of other objects is possible at all times.
また、サーミスタと熱電対とを一体化しであるので、サ
ーミスタで検知する温度を調整しさえすれば、他の部分
の温度も自ら所望の温度に調整されることになる。Furthermore, since the thermistor and thermocouple are integrated, once the temperature detected by the thermistor is adjusted, the temperatures of other parts can also be adjusted to the desired temperature.
この温度検知素子を接触させた加熱ローラでは、サーミ
スタと熱電対接合点が一体化されているので、加熱ロー
ラとサーミスタとの間に紙片が進入しても熱電対接合点
も同時に加熱ローラから離れるので、熱電対接点だけが
過熱されることもなく、基準信号発生用に熱電対を使用
しているので、基準信号の確度が高くなり、したがって
他のヒータが過熱するのを防止することができる。In the heating roller that is in contact with this temperature sensing element, the thermistor and thermocouple junction are integrated, so even if a piece of paper enters between the heating roller and thermistor, the thermocouple junction will separate from the heating roller at the same time. Therefore, only the thermocouple junction will not be overheated, and since the thermocouple is used to generate the reference signal, the accuracy of the reference signal will be high, thus preventing other heaters from overheating. .
またサーミスタと熱電対接合点が近接し且つ一体化され
ているので、温度検知素子を複写機に実装して加熱ロー
ラに接触させる場合にも便利である。Furthermore, since the thermistor and the thermocouple junction are close to each other and are integrated, it is convenient when a temperature sensing element is mounted on a copying machine and brought into contact with a heating roller.
図面はこの考案加熱ローラに接触させる温度検知素子の
構造を示す図である。
１・・・・・・サーミスタ、２・・・・・・熱電対接合
点、３・・・・・・ガラス、４・・・・・・リード線、
５・・・・・・熱電対素線。The drawing shows the structure of a temperature sensing element that is brought into contact with the invented heating roller. 1...Thermistor, 2...Thermocouple junction, 3...Glass, 4...Lead wire,
5...Thermocouple wire.
Claims (1)
る型の複写機等の加熱ローラにおいて、この加熱ローラ
の温度を検出するためのサーミスタとこの加熱ローラの
温度を基準として他のものの温度を制御するための熱電
対接合点とを互いに近接させて高熱伝導率の電気絶縁材
料で一体化して形成した温度検知素子を接触させたこと
を特徴とする複写機等の加熱ローラ。In the heating roller of a type of copying machine that controls the temperature of other things based on the temperature of the heating roller, a thermistor is used to detect the temperature of this heating roller and the temperature of other items is controlled using the temperature of this heating roller as a reference. 1. A heating roller for a copying machine or the like, characterized in that a temperature sensing element integrally formed with an electrically insulating material having high thermal conductivity is brought into contact with a thermocouple junction point that is placed close to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976170698U JPS5850287Y2 (en) | 1976-12-20 | 1976-12-20 | temperature sensing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976170698U JPS5850287Y2 (en) | 1976-12-20 | 1976-12-20 | temperature sensing element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5387679U JPS5387679U (en) | 1978-07-19 |
| JPS5850287Y2 true JPS5850287Y2 (en) | 1983-11-16 |
Family
ID=28778239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1976170698U Expired JPS5850287Y2 (en) | 1976-12-20 | 1976-12-20 | temperature sensing element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5850287Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49105941U (en) * | 1972-12-28 | 1974-09-11 |
-
1976
- 1976-12-20 JP JP1976170698U patent/JPS5850287Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5387679U (en) | 1978-07-19 |
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