JPS59204072A - Opening mechanism of form peeling pawl for fixing device - Google Patents
Opening mechanism of form peeling pawl for fixing deviceInfo
- Publication number
- JPS59204072A JPS59204072A JP58078672A JP7867283A JPS59204072A JP S59204072 A JPS59204072 A JP S59204072A JP 58078672 A JP58078672 A JP 58078672A JP 7867283 A JP7867283 A JP 7867283A JP S59204072 A JPS59204072 A JP S59204072A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- peeling claw
- peeling
- paper
- claw
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
- G03G15/2028—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電子写真複写機等の定着器、殊に加熱ロール
と加圧ロール、或は少なくとも２本の加−圧ロールの間
に未定着トナ像を付着した用紙を通して定着を行う定着
器に於ける周長のロールへの巻付防止用剥離爪の開放機
構に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device such as an electrophotographic copying machine, in particular a heating roll and a pressure roll, or a paper sheet having an unfixed toner image attached between at least two pressure rolls. The present invention relates to a mechanism for opening a peeling claw for preventing the circumferential length from being wrapped around a roll in a fixing device that performs fixing.
熱或は圧力によるロール定着装置に於いては、従来から
用紙のロールへの巻付きを防止する為、剥離爪をロール
表面に近接配置するのが一般的であるが、仁の爪は、ロ
ール表面を損傷しないよう極めて軽量にして薄い金属或
はプラスチックの板を加工したものである。その為、剥
離爪先端部に於いて用紙のジャムが発生し、用紙が核部
でアコーデオン状に畳み込まれるような事故が発生する
と爪が破損することが少なくなかった。Conventionally, in roll fixing devices that use heat or pressure, a peeling claw is placed close to the roll surface in order to prevent paper from wrapping around the roll. It is made from a thin metal or plastic plate that is extremely lightweight so as not to damage the surface. Therefore, if paper jams occur at the tip of the peeling claw and the paper is folded in an accordion shape at the core, the claw is often damaged.
本発明は上述のような従来のロール定着器に於ける用紙
剥離爪の破損を防止する為になされたものてらって、用
紙剥離爪をその先端が定着ロール表面に近接した位置と
離隔した位置の間でトグル機構を介して回動自在とした
定着器用紙剥離爪の開放機構を提供することを目的とす
る。The present invention was made in order to prevent the paper peeling claw from being damaged in the conventional roll fixing device as described above, and the present invention has been developed so that the paper peeling claw can be positioned at a position where the tip thereof is close to the surface of the fixing roll and at a position where it is distant from the surface of the fixing roll. It is an object of the present invention to provide a mechanism for releasing a paper peeling claw of a fixing device, which is rotatable via a toggle mechanism between the fixing device and the paper peeling claw.
以下、本発明を図面に示した実施例に基づいて詳細に説
明する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図は、本発明に係る剥離爪開放機構を適用すべき定
着器の一例を示す側面構成図であって、加熱ロール１と
加圧ロール２との間に図上右手から未定着トナ像を付着
した用紙を通し、熱と圧力とによって定着を行うもので
ある。FIG. 1 is a side configuration diagram showing an example of a fixing device to which a peeling claw opening mechanism according to the present invention is applied, in which an unfixed toner image is formed between a heating roll 1 and a pressure roll 2 starting from the right hand side in the figure. The fixing process uses heat and pressure to fix the image by passing it through the paper to which it has been attached.
このようなタイプの定着器に於いては、用紙が前記加熱
ロール１′ＶＣ巻きつく事故が多いため、剥離爪３の先
端を前記加熱ロール１表面に近接させるのが一般的であ
るが、発生した用紙ジャムの除去を容易にすると共に、
オペレータの手を前記型３から保護する為、前記型３を
その支持部材４に回動自在に取付け、更に前記支持部材
４を用紙のガイド・バッフル５諸共回動軸６を中心に回
動自在としたものである。In this type of fixing device, there are many accidents in which paper gets wrapped around the heating roll 1'VC, so it is common to place the tip of the peeling claw 3 close to the surface of the heating roll 1. In addition to making it easier to remove jammed paper,
In order to protect the operator's hands from the die 3, the die 3 is rotatably attached to its support member 4, and the support member 4 is rotatable about a rotation shaft 6 along with the paper guide/baffle 5. That is.
尚、７は爪３の先端位置を規制するストフパである。Note that 7 is a stopper that regulates the position of the tip of the claw 3.
このような構造の定着器に於いて、前記剥離爪３の先端
近傍に用紙ジャムが発生した場合には爪３を破損したり
、前記加熱ロール２表面のコーティングを傷付けたりす
るという問題があること前述のとうりである。In a fixing device having such a structure, if a paper jam occurs near the tip of the peeling claw 3, there is a problem that the claw 3 may be damaged or the coating on the surface of the heating roll 2 may be damaged. As mentioned above.
この問題を解決する為、本発明に於いては、剥離爪支持
部材４を第２図及び第３図に示すようにスプリング８で
付勢し、力の作用線が前記支持部材４の位置によってそ
の回動軸６の上側、或は下側のいずれかを通る、所謂ト
グル機構を構成する。In order to solve this problem, in the present invention, the peeling claw support member 4 is biased by a spring 8 as shown in FIGS. It constitutes a so-called toggle mechanism that passes either above or below the rotating shaft 6.
上記のようにすることＫよって、第３図に示°すように
、前記剥離爪３の先端近傍で用紙ジャムが発生した場合
には前記支持部材４全体にこれを押し上げる力が働き、
核部は前記回動軸６を中心拠して自動的に回転すること
Ｋなる。By doing the above, as shown in FIG. 3, when a paper jam occurs near the tip of the peeling claw 3, a force is applied to the entire supporting member 4 to push it up.
The core portion automatically rotates around the rotation axis 6.
しかしながら、現実には、ジャム発生状況が複雑なこと
及び、用紙の腰の強ζが多種多様であること等から、前
記トグル機構のスプリング力の調整は極めて困難である
。However, in reality, it is extremely difficult to adjust the spring force of the toggle mechanism because the situation in which a jam occurs is complicated and the stiffness ζ of paper varies widely.
この問題を解決する為には、例えば第４図に示すような
トグル機構の機能抑止解除機構を付加すればよい。In order to solve this problem, for example, a toggle mechanism function inhibition release mechanism as shown in FIG. 4 may be added.
即ち、前記剥離爪支持部材４の回動軸６に適当な長さの
アーム９を固定し、該アーム９の先端にロッド１０の先
端をビンで回転自在に取付ける。That is, an arm 9 of an appropriate length is fixed to the rotating shaft 6 of the peeling claw support member 4, and the tip of the rod 10 is rotatably attached to the tip of the arm 9 with a pin.
前記ロッド１０はその先端近傍にロック爪１１を有し、
後端部は回動自在のロッド支持シリンダ】２中に摺動自
在に挿入し、これを前記ロック爪１１との間にコイル・
スプリング１３を設けたものである。The rod 10 has a lock claw 11 near its tip,
The rear end is slidably inserted into the rotatable rod support cylinder 2, and the coil is inserted between it and the lock claw 11.
A spring 13 is provided.
一方、前記剥離爪３０回転軸１４ＶＣは、カム１５を固
定し、これと前記ロック爪ＩＩとの間にスプリング１６
で前記ロック爪１１の側に付勢し、た逆鉤（シア）１７
を配置し、通常の場合は前記逆鉤エフでｌ１１ｆ ｆｌ
ｕロック爪１１を係止し、前記スプリング１３に蓄力で
きるよう構成する。On the other hand, the rotation shaft 14VC of the peeling claw 30 fixes the cam 15, and a spring 16 is provided between the cam 15 and the locking claw II.
The reverse hook (shear) 17 is biased toward the lock claw 11 side.
In the normal case, use the above reverse hook F to set l11f fl
It is configured so that the U-lock pawl 11 is locked and the force can be stored in the spring 13.
前記剥離爪支持部材４０回動軸６に上述のような銃の撃
発機構類似の装置を付加するとと陀よって、ＭｆＩ記剥
離剥離爪３端に一定の力が加われば前記カム１５の回転
九よって前記逆鉤１７と前記ロック爪１１との係合が解
除され、前記ロッド】０が剥離爪支持部材４を突き上げ
て前記トグル機構を動作させるものである。If a device similar to the firing mechanism of a gun as described above is added to the rotation shaft 6 of the peeling claw support member 40, then when a certain force is applied to the end of the peeling claw 3 of the MfI, the rotation of the cam 15 will cause the cam 15 to rotate. The engagement between the reverse hook 17 and the lock claw 11 is released, and the rod 0 pushes up the peeling claw support member 4 to operate the toggle mechanism.
本発明は、以上説、明したように構成し、且つ動作する
ものであるから定着器に於いて用紙ジャムが発生した場
合であってそのジャムが用紙剥離機構を損傷する可能性
がある場合には自動的に前記用紙剥離機構を定着ロール
表面近接位置から離隔した位置へ回動することが可能と
なるので定着器の用紙剥離機構を破損することもなく、
しかもジャム除去も容易となるので電子写真複写機等の
定着器の保守を簡易化すると共に、その寿命又はサービ
ス・インターバルを延長する上で著しい効果を奏する。Since the present invention is constructed and operates as described above, it can be used when a paper jam occurs in the fixing device and the jam may damage the paper peeling mechanism. Since it is possible to automatically rotate the paper peeling mechanism from a position close to the surface of the fixing roll to a position away from the fixing roll surface, the paper peeling mechanism of the fixing device is not damaged.
Moreover, since jam removal becomes easy, maintenance of the fixing device of an electrophotographic copying machine or the like is simplified, and the service life or service interval of the fixing device is significantly extended.
第１図は本発明に係る用紙剥離爪の開放機構を適用すべ
き定着器の一例を示す側面構成図、第２図及び第３図は
夫々、本発明に係る用紙剥離爪支持部の開放機構の動作
を示す側面構成図であって、前者は通常状態、後者は動
作状態を示す図、第４図は本発明の用紙剥離爪支持部開
放機構の動作を確実にする為のトグル機構機能の抑止解
除装置の一実施例を示す側面図である。
１・・・・・・加熱ロール、２・・・・・・加圧ロール
、３・・・・・・アーム、１０・・・・・・ロッド、１
１・・・・・・ロック爪、１３・・・・・・スプリング
、１４・・・・・・剥離爪の回動軸、１５・・・・・・
カム、１６・・・・・・逆鉤のスプリング、１７特許出
願人 富士ゼロックス株式会社第２図 第３図FIG. 1 is a side configuration diagram showing an example of a fixing device to which a paper peeling claw opening mechanism according to the present invention is applied, and FIGS. 2 and 3 respectively show a paper peeling claw supporting portion opening mechanism according to the present invention. FIG. 4 is a side configuration diagram showing the operation of the paper peeling claw support part opening mechanism of the present invention, the former being a normal state and the latter being an operating state; FIG. FIG. 2 is a side view showing an embodiment of an inhibition release device. 1... Heating roll, 2... Pressure roll, 3... Arm, 10... Rod, 1
1...Lock claw, 13...Spring, 14...Rotation shaft of peeling claw, 15...
Cam, 16... Inverse hook spring, 17 Patent applicant Fuji Xerox Co., Ltd. Figure 2 Figure 3
Claims (2)
を付着した用紙を通して定着を行なう電子写真複写機等
の定着装置に於いて、用紙の定着ロールへの巻き付き防
止用剥離爪の先端を、前記定着ロール表面に近接した位
置と離隔した位置との間でトグル機構で回動自在にする
ことによッテ、前記剥離爪先端に於いて用紙のジャム力
発生し、腰部に所定の値を越えるカが加わった場合、自
動的に前記剥離爪先端を前記定着ロール表面から離隔す
るようにしたことを特徴とする定着器用紙剥離爪の開放
機構。(1) In a fixing device such as an electrophotographic copying machine that performs fixing by passing a sheet of paper with an unfixed toner image attached between at least two rolls, the tip of the peeling claw to prevent the paper from wrapping around the fixing roll is By making the fixing roll rotatable between a position close to the surface and a position away from the surface using a toggle mechanism, a paper jam force is generated at the tip of the peeling claw, and a predetermined value is applied to the waist. A mechanism for opening a paper peeling claw of a fixing device, characterized in that when an excessive force is applied, the tip of the peeling claw is automatically separated from the surface of the fixing roll.
トグル機構で回転できるようにし、前記支持部材の回動
軸にアームを固定し、これを介して前記回動軸にトルク
を加え得るよう前記アームの先端にロック爪を固定した
ロッド及び該ロッドを軸方向に付勢するスプリングを取
付けると共に、前記剥離爪の回動軸にカムを固定し、こ
れと前記ロック爪との間にスプリングで前記ロック爪の
側に付勢した逆鉤を配置して前記剥離爪先端に所定の値
を越える力が加わった場合、前記ロック爪と前記逆鉤と
の保合を解除して、前記支持部材を回転させることＫよ
ってこれに取付けた前記剥離爪先端を前記定着ロール表
面に近接した位置から確実に離隔するようにしたことを
特徴とする特許請求の範囲１記載の定着器用紙剥離爪の
開放機構。(2) A support member that rotatably supports the peeling claw can be rotated by a toggle mechanism, an arm is fixed to a rotation shaft of the support member, and a torque can be applied to the rotation shaft via the arm. In this way, a rod with a locking claw fixed thereto and a spring biasing the rod in the axial direction are attached to the tip of the arm, a cam is fixed to the rotating shaft of the peeling claw, and a spring is installed between this and the locking claw. If a force exceeding a predetermined value is applied to the tip of the peeling claw by disposing a biased reverse hook on the side of the locking claw, the engagement between the locking claw and the reverse hook is released and the support is removed. The paper peeling claw of the fuser according to claim 1, characterized in that by rotating the member, the tip of the peeling claw attached to the member is reliably separated from a position close to the surface of the fixing roll. Opening mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58078672A JPS59204072A (en) | 1983-05-04 | 1983-05-04 | Opening mechanism of form peeling pawl for fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58078672A JPS59204072A (en) | 1983-05-04 | 1983-05-04 | Opening mechanism of form peeling pawl for fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59204072A true JPS59204072A (en) | 1984-11-19 |
Family
ID=13668353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58078672A Pending JPS59204072A (en) | 1983-05-04 | 1983-05-04 | Opening mechanism of form peeling pawl for fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59204072A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0474631U (en) * | 1990-11-07 | 1992-06-30 | ||
| US5623720A (en) * | 1996-09-30 | 1997-04-22 | Xerox Corporation | Method and apparatus for stripper bar rotation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418921U (en) * | 1977-07-08 | 1979-02-07 | ||
| JPS5441739A (en) * | 1977-09-09 | 1979-04-03 | Canon Inc | Fixing device |
| JPS5547750A (en) * | 1978-10-03 | 1980-04-04 | Sony Corp | Pcm signal transmission unit |
-
1983
- 1983-05-04 JP JP58078672A patent/JPS59204072A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418921U (en) * | 1977-07-08 | 1979-02-07 | ||
| JPS5441739A (en) * | 1977-09-09 | 1979-04-03 | Canon Inc | Fixing device |
| JPS5547750A (en) * | 1978-10-03 | 1980-04-04 | Sony Corp | Pcm signal transmission unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0474631U (en) * | 1990-11-07 | 1992-06-30 | ||
| US5623720A (en) * | 1996-09-30 | 1997-04-22 | Xerox Corporation | Method and apparatus for stripper bar rotation |
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