JP3461691B2 - Fixing device temperature detector - Google Patents

Fixing device temperature detector

Info

Publication number
JP3461691B2
JP3461691B2 JP13986097A JP13986097A JP3461691B2 JP 3461691 B2 JP3461691 B2 JP 3461691B2 JP 13986097 A JP13986097 A JP 13986097A JP 13986097 A JP13986097 A JP 13986097A JP 3461691 B2 JP3461691 B2 JP 3461691B2
Authority
JP
Japan
Prior art keywords
temperature detecting
temperature
film
fixing roller
fixing device
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 - Fee Related
Application number
JP13986097A
Other languages
Japanese (ja)
Other versions
JPH10333484A (en
Inventor
昌憲 松田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13986097A priority Critical patent/JP3461691B2/en
Publication of JPH10333484A publication Critical patent/JPH10333484A/en
Application granted granted Critical
Publication of JP3461691B2 publication Critical patent/JP3461691B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Fixing For Electrophotography (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】この発明は、定着ローラに当
接してその温度を検知する温度検知部材を有する定着装
置の温度検知装置に関するものである。 【0002】 【従来の技術】従来この種の定着装置は、この発明の図
1に示す実施形態と共通するところがあるので、これを
参照して説明する。1は内部に加熱手段2が設けられて
いる定着ローラであって、これに押接する加圧ローラ2
とで図示しない未定着画像を担持した用紙を加熱加圧し
て定着像をうるものであり、定着ローラ1にはこれに当
接してその温度を検知する温度検知部材3が設けられて
いる。 【0002】このような温度検知部材3の典型的なもの
としては、図10,11に示されたようなものがあり、温度
検知素子4が2枚のフイルム22,23によって挾持されて
いる。そして定着ローラ1に当接する検知側フイルム22
は、ポリイミドフイルム24の表面にトナーの付着を防止
するための四フッ化エチレン層26をコートし、裏面には
耐熱性のシリコン系の接着剤を用いた両面接着テープ27
を貼付したものからなっており、他方のフイルム23は、
四フッ化エチレンの接着テープからなっている。 【0003】 【発明が解決しようとする課題】このような定着ローラ
1には、通常トナーとの離型性を確保するために、シリ
コンオイルを塗布することとなる。ところでこのシリコ
ンオイルの塗布量が多いと、検知側フイルム22は薄いた
めに、シリコンオイルが他方のフイルム23との接着面ま
で浸透してしまう。そうすると接着剤もシリコン系のも
のからなっていることから、接着力が低下して検知側フ
イルム22が剥離してしまって、温度検知素子4が定着ロ
ーラ1の表面を損傷したり、温度検知素子4にトナーが
堆積して、正確な温度検知が不可能になるというような
問題がある。 【0004】そこでこの発明の目的は、前記のような従
来の定着装置の温度検知装置のもつ問題を解消し、定着
ローラに塗布されるシリコンオイルの量が多くとも、温
度検知素子を被覆する検知側フイルムが剥離して、温度
検知素子が定着ローラの表面を損傷したり、温度検知素
子にトナーが堆積して、正確な温度検知が不可能になる
ことがない定着装置の温度検知装置を提供するにある。 【0005】 【課題を解決するための手段】この発明は、前記のよう
な目的を達成するために、請求項1に記載の発明は、定
着ローラと、この定着ローラの温度を検知する温度検知
部材とを有する定着装置の温度検知装置において、温度
検知部材は温度検知素子と、これを包被する筒状のフイ
ルム体とを有し、前記筒状のフイルム体は、その両端か
ら延出した舌状片を有し、温度検知素子を筒状のフイル
ム体内に配置し、前記舌状片を折返して筒状のフイルム
体に接着して、温度検知素子を包被したことを特徴とす
るものである。 【0006】 【0007】 【0008】 【発明の実施の形態】図1〜3に示すこの発明の第1実
施形態において、前記従来例と同様の部分には同一の符
号を付して説明を省略し、主として異なる部分について
説明する。この実施形態は、温度検知部材3は、前記従
来例と同様に、検知側フイルム5と、他方側のフイルム
6で温度検知素子4を挾持したものからなっている。そ
して検知側フイルム5は、ポリイミドフイルム7の表面
にトナーの付着を防止するための四フッ化エチレン層8
をコートし、裏面には耐熱性のシリコン系の接着剤を用
いた両面接着テープ9を貼付してあって、周縁は上方に
折曲されて周壁部11を形成し、全体が凹状となってい
る。他方のフイルム6は、四フッ化エチレンの接着テー
プからなっている。 【0009】そしてこの実施形態は、検知側フイルム5
の底面が定着ローラ1側になるように設置される。とこ
ろでこの検知側フイルム5は凹状となっていて、周壁部
11が形成されていることから、定着ローラ1に塗布され
たシリコンオイルが、両フイルム5,6の接着面まで滲
みこむことがなく、したがってフイルム6が剥離して温
度検知素子4が定着ローラ1の表面を損傷したり、温度
検知素子4にトナーが堆積して、正確な温度検知が不可
能になるというようなことがない。 【0010】図4〜6に示すこの発明の第2実施形態
は、第1実施形態におけると同様に、温度検知部材3
が、2枚のフイルム5,6に温度検知素子4が挾持さ
れ、さらに一方の検知側フイルム5の周壁部11の上端が
内側に折畳まれて、この折畳部12が他方のフイルム6に
接着される点と、他方のフイルム6に温度検知素子4の
導線を挿入するための切溝13が設けられた点で、第1実
施形態と相違するだけで、他に相違するところがない。
そして検知側フイルム5の底面が、定着ローラ1側とな
るように配置される。このようにすることによって、シ
リコンオイルが両フイルム5,6の接着面に、滲みこむ
のがより有効に阻止される。なお両フイルム5,6の接
着は折畳部12だけでなく、一方のフイルム6の全面であ
っても構わない。 【0011】図7〜9に示すこの発明の第3実施形態
は、検知側フイルム5の中間に筒状部14を形成して、そ
の両端から舌状片16を延出し(図7)、この舌状片16の
内面に両面接着テープ17を接着し(図8)、筒状部14内
に温度検知素子4を挿入したうえ、舌状片16を折返して
その内面を筒状部14に接着している。そしてこの舌状片
16と筒状部14との接着面が、定着ローラ1の反対側とな
るように定着装置に配置することとなる。このようであ
るので、その作用はほぼ第3実施形態と同様であるので
説明は省略する。 【0012】 【発明の効果】この発明は上記のようであって、請求項
1に記載の発明は、定着ローラと、この定着ローラの温
度を検知する温度検知部材とを有する定着装置の温度検
知装置において、温度検知部材は温度検知素子と、これ
を包被する筒状のフイルム体とを有し、前記筒状のフイ
ルム体は、その両端から延出した舌状片を有し、温度検
知素子を筒状のフイルム体内に配置し、前記舌状片を折
返して筒状のフイルム体に接着して、温度検知素子を包
被されているので、舌状片を折返部を定着ローラ側にな
るように配置することによって、シリコンオイルが両フ
イルムの接着面に、滲みこむのがより有効に阻止される
いう効果がある。 【0013】 【0014】
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detecting device of a fixing device having a temperature detecting member which contacts a fixing roller and detects the temperature of the fixing roller. 2. Description of the Related Art Conventionally, this type of fixing device has some common features with the embodiment shown in FIG. 1 of the present invention, and will be described with reference to this. Reference numeral 1 denotes a fixing roller provided with a heating means 2 therein, and a pressing roller 2 pressing against the fixing means.
The fixing roller 1 is provided with a temperature detecting member 3 which comes into contact with the fixing roller 1 to detect the temperature thereof by heating and pressing a sheet carrying an unfixed image (not shown). A typical example of such a temperature detecting member 3 is shown in FIGS. 10 and 11, and a temperature detecting element 4 is sandwiched between two films 22 and 23. Then, the detection-side film 22 that contacts the fixing roller 1
Is coated on the surface of the polyimide film 24 with an ethylene tetrafluoride layer 26 for preventing adhesion of toner, and on the back surface, a double-sided adhesive tape 27 using a heat-resistant silicon-based adhesive.
Is attached, and the other film 23 is
It is made of tetrafluoroethylene adhesive tape. [0003] Silicon oil is applied to such a fixing roller 1 in order to ensure releasability from normal toner. If the amount of silicone oil applied is large, the detection-side film 22 is thin, so that the silicone oil permeates to the surface to be bonded to the other film 23. Then, since the adhesive is also made of a silicon-based material, the adhesive strength is reduced, and the detection-side film 22 is peeled off, and the temperature detecting element 4 may damage the surface of the fixing roller 1, There is a problem that toner accumulates in No. 4 and accurate temperature detection becomes impossible. Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional temperature detecting device of the fixing device, and to detect the temperature of the temperature detecting element even if the amount of silicone oil applied to the fixing roller is large. Provided is a temperature detecting device for a fixing device in which the temperature detecting element does not damage the surface of the fixing roller due to peeling of the side film and toner accumulates on the temperature detecting element so that accurate temperature detection becomes impossible. To be. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a fixing roller and a temperature sensor for detecting a temperature of the fixing roller. a temperature sensing device of the fixing device which have a and member, the temperature
The sensing member is a temperature sensing element and a tubular
And the cylindrical film body is provided at both ends thereof.
The temperature sensing element has a tongue-shaped piece
The tongue-shaped piece is folded back into a cylindrical film
It is characterized by being adhered to a body and enclosing a temperature detecting element . [0008] In the first embodiment of the present invention shown in FIGS. 1 to 3, the same parts as those in the conventional example are denoted by the same reference numerals and description thereof is omitted. The following mainly describes the different parts. In this embodiment, the temperature detecting member 3 is formed by sandwiching the temperature detecting element 4 between the detecting film 5 and the other film 6 as in the conventional example. The detection-side film 5 includes an ethylene tetrafluoride layer 8 for preventing toner from adhering to the surface of the polyimide film 7.
And a double-sided adhesive tape 9 using a heat-resistant silicone-based adhesive is stuck on the back surface, and the peripheral edge is bent upward to form a peripheral wall portion 11, and the whole is concave. I have. The other film 6 is made of an adhesive tape of tetrafluoroethylene. In this embodiment, the detection-side film 5 is used.
Is installed so that the bottom surface of the fixing roller 1 is on the fixing roller 1 side. Incidentally, the detection-side film 5 has a concave shape and has a peripheral wall portion.
Since the film 11 is formed, the silicone oil applied to the fixing roller 1 does not permeate to the bonding surfaces of the films 5 and 6, so that the film 6 is peeled off and the temperature detecting element 4 is There is no possibility that accurate temperature detection becomes impossible due to damage to the surface of the device or accumulation of toner on the temperature detection element 4. A second embodiment of the present invention shown in FIGS. 4 to 6 has a temperature detecting member 3 similar to the first embodiment.
However, the temperature detecting element 4 is sandwiched between the two films 5 and 6, and the upper end of the peripheral wall 11 of one of the detecting films 5 is folded inward. It differs from the first embodiment only in that it is bonded and that a cut groove 13 for inserting the conducting wire of the temperature detecting element 4 is provided in the other film 6, and there is no other difference.
Then, the bottom surface of the detection-side film 5 is disposed so as to be on the fixing roller 1 side. By doing so, it is possible to more effectively prevent the silicone oil from seeping into the bonding surfaces of the films 5, 6. The films 5 and 6 may be bonded not only to the folded portion 12 but also to the entire surface of one of the films 6. In a third embodiment of the present invention shown in FIGS. 7 to 9, a tubular portion 14 is formed in the middle of the detection film 5, and a tongue 16 is extended from both ends thereof (FIG. 7). A double-sided adhesive tape 17 is adhered to the inner surface of the tongue-shaped piece 16 (FIG. 8), and after inserting the temperature detecting element 4 into the cylindrical part 14, the tongue-shaped piece 16 is folded back and the inner surface is adhered to the cylindrical part 14. are doing. And this tongue
The fixing device is arranged so that the bonding surface between the cylindrical portion 16 and the cylindrical portion 14 is on the opposite side of the fixing roller 1. Since this is the case, the operation is almost the same as that of the third embodiment, and a description thereof will be omitted. The present invention is as described above. According to the first aspect of the present invention, there is provided a fixing device having a fixing roller and a temperature detecting member for detecting a temperature of the fixing roller.
In the sensing device, the temperature detecting member is a temperature detecting element
And a cylindrical film body enclosing the cylindrical film.
Lum body has tongue-shaped pieces extending from both ends,
The intelligent device is placed in a cylindrical film, and the tongue is folded.
Turn back and adhere to the cylindrical film to enclose the temperature sensing element.
So that the tongue-shaped piece is folded back to the fixing roller side.
Silicon oil is placed in both
More effective prevention of seepage into the adhesive surface of the ilum
There is an effect called. [0014]

【図面の簡単な説明】 【図1】この発明の第1実施形態の正面図である。 【図2】同上の温度検知部材の分解斜面図である。 【図3】同上の組立後の分解断面図である。 【図4】この発明の第2実施形態の温度検知部材の分解
斜面図である。 【図5】同上の組立時における分解断面図である。 【図6】同上の組立後の断面図である。 【図7】この発明の第3実施形態の温度検知部材の分解
斜面図である。 【図8】同上の組立前の斜面図である。 【図9】同上の組立後の断面図である。 【図10】この発明と同種の従来の温度検知装置の分解
斜面図である。 【図11】同上の組立時における分解斜面図である。 【符号の説明】 1 定着ローラ 2 加圧ローラ 3 温度検知部材 4 温度検知素子 5 検知側フイルム 6 フイルム 7 ポリイミドフイルム 8 四フッ化エチレ
ン層 9 両面接着テープ 11 周壁部 12 折畳部 13 切溝 14 筒状部 16 舌状片
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the temperature detecting member. FIG. 3 is an exploded cross-sectional view after assembling the same. FIG. 4 is an exploded perspective view of a temperature detecting member according to a second embodiment of the present invention. FIG. 5 is an exploded sectional view at the time of assembling the same. FIG. 6 is a sectional view after assembling the same. FIG. 7 is an exploded perspective view of a temperature detecting member according to a third embodiment of the present invention. FIG. 8 is a perspective view of the same before assembling. FIG. 9 is a cross-sectional view of the same after assembly. FIG. 10 is an exploded perspective view of a conventional temperature detecting device of the same type as the present invention. FIG. 11 is an exploded perspective view when assembling the same. [Description of Signs] 1 Fixing roller 2 Pressure roller 3 Temperature detecting member 4 Temperature detecting element 5 Detecting film 6 Film 7 Polyimide film 8 Polytetrafluoroethylene layer 9 Double-sided adhesive tape 11 Peripheral wall portion 12 Folding portion 13 Cut groove 14 Tubular part 16 Tongue

Claims (1)

(57)【特許請求の範囲】 【請求項1】 定着ローラと、この定着ローラの温度を
検知する温度検知部材とを有する定着装置の温度検知装
置において、温度検知部材は温度検知素子と、これを包
被する筒状のフイルム体とを有し、前記筒状のフイルム
体は、その両端から延出した舌状片を有し、温度検知素
子を筒状のフイルム体内に配置し、前記舌状片を折返し
て筒状のフイルム体に接着して、温度検知素子を包被し
ことを特徴とする定着装置の温度検知装置。
(57) Patent Claims 1. A fixing roller, a temperature detection instrumentation of the fixing device to have a temperature detecting member for detecting the temperature of the fixing roller
In the device, the temperature detecting member includes a temperature detecting element and the temperature detecting element.
A cylindrical film body to be covered, wherein the cylindrical film
The body has a tongue extending from both ends and a temperature sensing element.
The child is placed in a cylindrical film body, and the tongue is folded back.
To adhere to the cylindrical film body and cover the temperature sensing element.
A temperature detecting device for a fixing device.
JP13986097A 1997-05-29 1997-05-29 Fixing device temperature detector Expired - Fee Related JP3461691B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13986097A JP3461691B2 (en) 1997-05-29 1997-05-29 Fixing device temperature detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13986097A JP3461691B2 (en) 1997-05-29 1997-05-29 Fixing device temperature detector

Publications (2)

Publication Number Publication Date
JPH10333484A JPH10333484A (en) 1998-12-18
JP3461691B2 true JP3461691B2 (en) 2003-10-27

Family

ID=15255232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13986097A Expired - Fee Related JP3461691B2 (en) 1997-05-29 1997-05-29 Fixing device temperature detector

Country Status (1)

Country Link
JP (1) JP3461691B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4838667B2 (en) * 2006-09-01 2011-12-14 キヤノン株式会社 Temperature sensor and fixing device

Also Published As

Publication number Publication date
JPH10333484A (en) 1998-12-18

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