JPH0452676A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPH0452676A JPH0452676A JP16128090A JP16128090A JPH0452676A JP H0452676 A JPH0452676 A JP H0452676A JP 16128090 A JP16128090 A JP 16128090A JP 16128090 A JP16128090 A JP 16128090A JP H0452676 A JPH0452676 A JP H0452676A
- Authority
- JP
- Japan
- Prior art keywords
- fixing roller
- separation claw
- fixing
- roller
- 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
- 210000000078 claw Anatomy 0.000 claims abstract description 129
- 238000000926 separation method Methods 0.000 claims abstract description 92
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 9
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 208000014674 injury Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、電子写真装置、静電記録装置、レーザビーム
プリンタ等の画像形成装置のための定着装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fixing device for an image forming apparatus such as an electrophotographic apparatus, an electrostatic recording apparatus, or a laser beam printer.
［従来の技術］
この種の定着装置としては添付図面の第１４図及び第１
５図に示されているごとくのものか知られている。[Prior Art] This type of fixing device is shown in FIGS. 14 and 1 of the attached drawings.
Something like the one shown in Figure 5 is known.
図示のごとく、従来の定着装置１００は定着装置本体部
１００ａ及び定着排紙部１００ｂにより構成されており
、支軸７により定着排紙部１００ｂは定着装置本体部１
００ａに回動自在に取り付けられている。ここて、２は
定着ローラ、３は加圧ローラてあり、加圧手段（図示せ
ず）により加圧ローラ３は定着ローラ２に圧接されて、
所定幅のニップ部（挟圧部）を形成している。As shown in the figure, the conventional fixing device 100 is composed of a fixing device main body section 100a and a fixing paper discharge section 100b.
It is rotatably attached to 00a. Here, 2 is a fixing roller, 3 is a pressure roller, and the pressure roller 3 is pressed against the fixing roller 2 by a pressure means (not shown).
A nip portion (squeezing portion) having a predetermined width is formed.
かかる定着装置にあっては、転写手段（図示せず）によ
り未定着のトナーを載せた転写材Ｐは入口上ガイド４及
び入ロガイト５に導かれなから、定着ローラ２及び加圧
ローラ３か形成するニップ部に搬入されて、未定着トナ
ー像か転写材Ｐ上に定着される。転写材Ｐは定着ローラ
２に巻き付く可能性かあるので、その場合に転写材Ｐを
定着ローラ２より分離するために支持ホルタ−１４に支
持された分離爪１１かばね１６により定着ローラ２に圧
接されている。しかし、何らかの原因により定着装置内
て紙づまり（以下「ジャム」という）か起きた場合には
、第１５図に示すように、定着排紙部１００ｂを支軸７
を中心に回動することにより転写材排出口を開いてジャ
ム処理か容易に行えるようにしている。このとき、分離
爪１１の先端か支持ホルタ−Ｉ４から上方に飛び出した
状態になっている。また、分離爪１１は定着ローラ長手
方向（紙面に直角な方向）に複数個存在し、排紙ローラ
１２及び排紙コロ１３か分離爪１１と共に支持ホルタ−
１４に取り付けられている。In such a fixing device, since the transfer material P on which unfixed toner is placed by the transfer means (not shown) is not guided to the upper entrance guide 4 and the entrance logite 5, it is not guided to the fixing roller 2 and the pressure roller 3. The unfixed toner image is carried into the forming nip portion and fixed onto the transfer material P. Since the transfer material P may wrap around the fixing roller 2, in that case, in order to separate the transfer material P from the fixing roller 2, the separation claw 11 supported by the support halter 14 is pressed against the fixing roller 2 by a spring 16. has been done. However, if a paper jam (hereinafter referred to as a "jam") occurs in the fixing device for some reason, the fixing paper discharge section 100b should be moved to the support shaft 7 as shown in FIG.
By rotating around the center, the transfer material discharge port is opened and jam removal can be easily performed. At this time, the tip of the separation claw 11 is in a state of protruding upward from the support holster I4. Further, a plurality of separation claws 11 exist in the longitudinal direction of the fixing roller (direction perpendicular to the paper surface), and the paper ejection roller 12 and the paper ejection roller 13 or the separation claws 11 are attached to the supporting holster.
It is attached to 14.
［発明か解決しようとする課題］
かくして、上記従来装置ては、何らかの原因により転写
材か定着装置内においてジャムを起こした場合には、転
写材を定着装置内から取り除く必要かあるので、分離爪
支持部材は定着ローラ支持部材に対して離間するように
移動可能に取り付けた構成にすることによりジャム処理
を容易にしている。[Problem to be Solved by the Invention] Thus, in the above-mentioned conventional device, if the transfer material jams in the fixing device for some reason, it is necessary to remove the transfer material from the fixing device. The support member is configured to be movably attached so as to be spaced apart from the fixing roller support member, thereby facilitating jam handling.
しかし、上記構成ては、分離爪は付勢手段により定着ロ
ーラに圧接されているのて、分離爪支持部材を移動させ
る際に分離爪が定着ローラの表面を滑りながら着脱する
こととなり、定着ローラの表面に傷をつけ、転写材の画
像の乱れや画像フレあるいは定着ローラの低寿命化等の
問題をもたらしていてた。However, in the above configuration, since the separating claw is pressed against the fixing roller by the urging means, the separating claw slides on the surface of the fixing roller when moving the separating claw supporting member, and is attached to and detached from the fixing roller. The surface of the transfer material is scratched, resulting in problems such as distorted and blurred images on the transfer material, and shortened lifespan of the fixing roller.
また、ジャム処理の際に分離爪支持部材を移動させて転
写材排出口を開いたとき、分離爪の鋭利な爪先端か分離
爪支持部材から飛びだした状態になっているのて、誤っ
て手を分離爪先端に引っ掛けて怪我をするという危険性
もあった。In addition, when the separation claw support member is moved to open the transfer material ejection port when clearing a jam, the sharp tip of the separation claw may stick out from the separation claw support member, causing the user to accidentally touch it. There was also the risk of getting caught on the tip of the separating claw and causing injury.
本発明は、かかる従来装置の問題を解決し、ジャムの対
処等のために、定着排紙部を開いた際に、分離爪か定着
ローラに圧接していることのないような定着装置を提供
することを目的とする。The present invention solves the problems of such conventional devices, and provides a fixing device that does not come into pressure contact with either the separating claw or the fixing roller when the fixing sheet discharge section is opened in order to deal with jams, etc. The purpose is to
［課題を解決するための手段］
本発明によれば、上記目的は、
定着ローラを支持する定着ローラ支持部材と、上記定着
ローラに圧接し転写材を分離するための分離爪を支持す
る分離爪支持部材とを有し、上記分離爪支持部材は、上
記定着ローラ支持部材に対して、上記分離爪か定着ロー
ラに圧接する第一の位置と、定着ローラから離れた第二
の位置との間で移動可能に分離爪を支持している定着装
置において、
Ｌ品定着ローラ支持部材に、分離爪を定着ローラに圧接
する方向に付勢する第一の付勢手段を設け、
上記分離爪は、第一の位置にて、上記第一の付勢手段に
より定着ローラに圧接し、第二の位置にて定着ローラと
離反する方向に付勢する第二の付勢手段を備えているか
、あるいは分離爪の自重により定着ローラと離反する方
向に移動するように設定されている、
ことにより達成される。[Means for Solving the Problems] According to the present invention, the above object is as follows: A fixing roller support member that supports a fixing roller, and a separation claw that supports a separation claw that comes into pressure contact with the fixing roller and separates a transfer material. and a support member, and the separating claw supporting member is between a first position where the separating claw is in pressure contact with the fixing roller and a second position away from the fixing roller with respect to the fixing roller supporting member. In a fixing device that movably supports a separation claw, the L-product fixing roller support member is provided with a first biasing means for urging the separation claw in a direction in which the separation claw is brought into pressure contact with the fixing roller, and the separation claw is configured to The first urging means presses the fixing roller at the first position, and the second urging means presses the fixing roller in a direction away from the fixing roller at the second position. This is achieved by setting the claw so that it moves in the direction away from the fixing roller due to its own weight.
［作用］
ジャム対処時等において、分離爪支持部材を第二の位置
にまて移動させると、分離爪は第二の付勢手段もしくは
自重により定着ローラから離間する。[Function] When the separation claw supporting member is moved to the second position when dealing with a jam, the separation claw is separated from the fixing roller by the second biasing means or by its own weight.
［実施例］
以下、添付図面の第１図ないし第１３図にもとづいて本
発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail based on FIGS. 1 to 13 of the accompanying drawings.
〈第一実施例〉
本発明の第一実施例が第１図ないし第４図に示されてい
る。First Embodiment A first embodiment of the invention is shown in FIGS. 1-4.
本実施例装置において、定着装Ｎ１００は定着装置本体
部１００ａ及び定着排紙部１００ｂにより構成されてお
り、定着排紙部１００ｂは定着装置本体部１００ａに支
軸７により回動自在に取り付けられている。In the apparatus of this embodiment, the fixing device N100 is composed of a fixing device main body portion 100a and a fixing paper discharge portion 100b, and the fixing paper discharge portion 100b is rotatably attached to the fixing device main body portion 100a by a support shaft 7. There is.
かかる装置において、ｌは定着ローラを支持する定着ロ
ーラ支持部材としての支持側板、２は定着ローラ、３は
該定着ローラ２に圧接回動する加圧ローラ、４は転写材
の案内のための入口上カイト、５は人ロガイト、６は分
離カイト、７は支軸、８は定着フレームカバー、９．１
０はばね、１１は分離爪、１２は排紙ローラ、１３は排
紙コロ、１４は分離爪支持部材としての支持ホルダー、
１５はホルタ−カバー、１７はばねである。上記第−付
勢手段としてのばね９は定着排紙部１００ｂを定着装置
本体部１００ａに装着したときに分離爪１１を定着ロー
ラ２に圧接せしめ、第二付勢手段としてのばね１７は定
着排紙部１００ｂの開放時に分離爪を定着ローラ２から
離間せしめる機能を担っている。また、ばね１０は定着
排紙部１００ｂを定着装置本体部１００ａに引き付ける
役割を果している。In this device, l is a supporting side plate as a fixing roller support member that supports the fixing roller, 2 is a fixing roller, 3 is a pressure roller that rotates in pressure contact with the fixing roller 2, and 4 is an entrance for guiding the transfer material. Upper kite, 5 is human logite, 6 is separation kite, 7 is spindle, 8 is fixing frame cover, 9.1
0 is a spring, 11 is a separation claw, 12 is a paper discharge roller, 13 is a paper discharge roller, 14 is a support holder as a separation claw support member,
15 is a halter cover, and 17 is a spring. The spring 9 as the first biasing means presses the separating claw 11 against the fixing roller 2 when the fixing sheet discharge section 100b is attached to the fixing device main body 100a, and the spring 17 as the second biasing means It has a function of separating the separating claw from the fixing roller 2 when the paper portion 100b is opened. Further, the spring 10 plays a role of attracting the fixing paper discharge section 100b to the fixing device main body section 100a.
上記のごとくの構成の本実施例装置においては、転写手
段（図示せず）により未定着トナーを載せた転写材Ｐは
、人口上ガイド４及びλロガイト５に導かれなから定着
ローラ２と加圧ローラ３とで形成されたニップ部に確実
に搬入されて、上記転写材上の未定着トナー像が転写材
Ｐ上に定着される。転写材Ｐは定着ローラに巻き付＜Ｏ
Ｔｉ性かあるのて、その場合には分離爪１１により定着
ローラ２から分離して、排紙ローラ１２及び排紙コロ１
３により挟持搬送し、転写材を排出または次の処理（多
重または両面複写）へと送り出す。In the apparatus of this embodiment configured as described above, the transfer material P on which unfixed toner is placed by the transfer means (not shown) is not guided by the artificial guide 4 and the The unfixed toner image on the transfer material P is reliably carried into the nip formed by the pressure roller 3 and fixed onto the transfer material P. The transfer material P is wrapped around the fixing roller <O
In that case, it is separated from the fixing roller 2 by the separation claw 11, and the paper ejection roller 12 and paper ejection roller 1 are separated from the fixing roller 2 by the separation claw 11.
3, the transfer material is pinched and conveyed, and the transfer material is discharged or sent to the next processing (multiple or double-sided copying).
ここて、何らかの原因により定着装置内てジャムか発生
した場合には、定着排紙部１００ｂを支軸７を中心に回
動してジャム処理をする。その際、本実施例装置では定
着ローラの長手方向に複数個設けられた分離爪１１の爪
先端か定着ローラ２と離間する方向に回動して退避する
ようになる。Here, if a jam occurs in the fixing device for some reason, the fixing paper discharge section 100b is rotated around the spindle 7 to clear the jam. At this time, in the apparatus of this embodiment, the tip of a plurality of separation claws 11 provided in the longitudinal direction of the fixing roller rotates in a direction away from the fixing roller 2 and retreats.
上記分離爪の退避の動作についてさらに詳しく説明する
と、先ず、定着排紙部１００ｂか定着装置本体部１００
ａに対して閉じた状態（装着状８）では、分離爪１１を
定着ローラ２から離間する方向に付勢する第二付勢手段
としてのばね１７か定着フレームカバー８に突き当たる
のて、分離爪１１は該ばね１７の付勢力から解放され、
定着装置本体部１００ａの定着フレームカバー８の分離
爪ｉｔに対向する位置に取り付けられた第一付勢手段と
してのばね９により、定着ローラ２に圧接した状態とな
る。To explain in more detail the retracting operation of the separation claw, first, the fixing paper discharge section 100b or the fixing device main body section 100
In the closed state with respect to a (mounted state 8), the spring 17 serving as a second biasing means for biasing the separating claw 11 in the direction away from the fixing roller 2 hits the fixing frame cover 8, and the separating claw 11 is released from the biasing force of the spring 17,
The fixing device body 100a is brought into pressure contact with the fixing roller 2 by a spring 9 serving as a first biasing means attached to a position opposite to the separating claw it of the fixing frame cover 8.
次に、ジャムに対処するために定着排紙部１００ｂが定
着装置本体部１００ａに対して開く際には、分離爪１１
はばね１７により分離爪フランジ部１１ｃが第４図（Ａ
）にて時計まわり方向に押されるので、分離爪支軸１１
ａを中心に同方向へ回動して分離爪先端１１ｂは定着ロ
ーラ２に対して離間する方向に回動して没するようにな
る。かくして、ジャム処理の際に誤って分離爪先端に手
を引っ掛けて怪我をすることはなくなる。ここで、ばね
１７は、支持ホルダー１４に一体に設けた軸部１４ｃに
取り付けられており、また分離爪１４の回動角はばね１
７か支持ホルダー１４のストッパ一部１４ｂに突き当た
るまでの角度て定まる。Next, when the fixing paper discharge section 100b opens with respect to the fixing device main body section 100a in order to deal with a jam, the separating claw 11
The separation claw flange portion 11c is moved by the spring 17 as shown in FIG.
), the separation claw support shaft 11
By rotating in the same direction about a, the separating claw tip 11b rotates in a direction away from the fixing roller 2 and sinks. In this way, when clearing a jam, there is no chance of getting your hand accidentally caught on the tip of the separating claw and getting injured. Here, the spring 17 is attached to a shaft portion 14c provided integrally with the support holder 14, and the rotation angle of the separation claw 14 is
7 or the angle until it hits the stopper part 14b of the support holder 14.
また、定着排紙部１００ｂを閉しる際には、分離爪１１
のその面か定着ローラ２の面に対して、互の面に直角な
方向から圧接するので定着ローラ表面に傷つけることか
なく定着装置での画像の乱れや画像ブレ等の障害かなく
、定着ローラの長寿命化さらには定着装置の長寿命化に
つながる。In addition, when closing the fixing sheet discharge section 100b, the separation claw 11
Since the surface of the fixing roller 2 is pressed against the surface of the fixing roller 2 from a direction perpendicular to each surface, the fixing roller is pressed without damaging the surface of the fixing roller and without problems such as image distortion or image blurring in the fixing device. This leads to a longer lifespan of the fixing device and a longer lifespan of the fixing device.
定着ローラ長手方向に複数個設けた分離爪は本実施例で
は各々単独の回動軸をもって支持ホルダーに取り付けら
れており、こうすることにより、分離爪に回動用の軸を
通さないのて、そのためのスペースを要せず設計上の自
由度か広がるとともに、構成が簡単になるのて低コスト
、組立性の面においても有利となる。In this embodiment, a plurality of separating claws provided in the longitudinal direction of the fixing roller are each attached to a support holder with a separate rotating shaft. It does not require much space, which increases the degree of freedom in design, and the structure is simple, which is advantageous in terms of low cost and ease of assembly.
さらに、定着排紙部を開いた際に、分離爪先端を定着ロ
ーラに対して離間する方向に回動する第二付勢手段とし
て、ばねを用いることなく分離爪の自重により回動する
ように構成してもよい。Furthermore, when the fixing sheet discharge section is opened, the separation claw tip is rotated by the weight of the separation claw without using a spring as a second biasing means that rotates the tip of the separation claw in a direction to move away from the fixing roller. may be configured.
〈第二実施例〉
次に、本発明の第二実施例を第５図から第８図を用いて
説明する。前実施例と共通部分には同一符号を付して説
明を省略する。<Second Embodiment> Next, a second embodiment of the present invention will be described using FIGS. 5 to 8. The same parts as those in the previous embodiment are given the same reference numerals, and their explanation will be omitted.
図において、１８は分離爪回転レバー、１９は第二付勢
手段としてのばね、２０は軸受である。本実施例におい
て、定着排紙部１００ｂが定着装置本体部１００ａに対
して閉じた状態ては分離爪回転レバー１８の突き当てア
ーム部１８ｃが定着フレームカバー８に突き当たり、分
離爪１１は分離爪回転レバー１８の分離爪押し上げアー
ム部１８ｂから解放されており、定着フレームカバー８
に取り付けられた第−付勢手段としてのばね９により定
着ローラ２に圧接している。次に定着排紙部ｔｏｏｂか
定着装置本体部１００ａに対して開く際には、分離爪回
転レバー１８の突き当てアーム部１８ｃが定着フレーム
カバ−８の突き当て面から解放されて、ばね１９により
分離爪回転レバー１８が反時計方向に回動する。このと
き、分離爪回転レバー１８の分離爪押し上げアーム部１
８ｂは分離爪フランジ部１１ｃを押し上げる状態になる
のて、分離爪先端１１ｂは分離爪支軸１１ａを中心に時
計方向に回動し、ジャム処理の際に手に引っかからない
位置にくる。これにより、分離爪１１はジャム処理の際
に邪魔にならず、誤って手に引っ掛けて怪我をするとい
う危険性もない。In the figure, 18 is a separation claw rotating lever, 19 is a spring as a second biasing means, and 20 is a bearing. In this embodiment, when the fixing sheet discharge section 100b is closed with respect to the fixing device main body section 100a, the abutment arm section 18c of the separation claw rotation lever 18 abuts against the fixing frame cover 8, and the separation claw 11 is rotated. The separation claw of the lever 18 is released from the push-up arm 18b, and the fixing frame cover 8
The fixing roller 2 is pressed against the fixing roller 2 by a spring 9 as a first biasing means attached to the fixing roller 2 . Next, when the fixing sheet discharge section toob is opened relative to the fixing device main body section 100a, the abutting arm section 18c of the separation claw rotating lever 18 is released from the abutting surface of the fixing frame cover 8, and the spring 19 The separation claw rotation lever 18 rotates counterclockwise. At this time, the separation claw push-up arm 1 of the separation claw rotation lever 18
8b pushes up the separation claw flange portion 11c, and the tip 11b of the separation claw rotates clockwise around the separation claw support shaft 11a, and comes to a position where it will not get caught in the hand when clearing a jam. As a result, the separation claw 11 does not get in the way during jam removal, and there is no risk of injury by accidentally catching it on your hand.
次に、定着排紙部１００ｂか定着装置本体部１００ａに
対して閉じる際には、前実施例の場合と同様に、分離爪
先端１１ｂはその面か定着ローラ２の面に対して、互の
面に直角な方向から圧接するように構成されているのて
、定着ローラ２の表面に傷をつけることかなく、画像の
乱れや画像ブレ等の心配もないのて、定着ローラの長寿
命化更には定着装置の長寿命化にもつながる。Next, when closing the fixing paper ejection section 100b to the fixing device main body section 100a, the separating claw tip 11b is moved against that surface or the surface of the fixing roller 2, as in the previous embodiment. Since it is configured to press against the surface at right angles to the surface, there is no need to damage the surface of the fixing roller 2, and there is no need to worry about image distortion or image blurring, extending the life of the fixing roller. Furthermore, it also leads to a longer life of the fixing device.
上記のごとくの本実施例構成ては、分離爪回転支軸と別
に分離爪を回転させるための軸を定着ローラ長手方向に
１本通しているのて、かなりのスペースを必要とするが
、分離爪の個数が多くなった場合には、前実施例のよう
に個々に分離爪回転用のばねを設けるよりも、組立性あ
るいはコストの面からみても有利となる。In the configuration of this embodiment as described above, a shaft for rotating the separation claw is passed through in the longitudinal direction of the fixing roller in addition to the separation claw rotation support shaft, so a considerable amount of space is required. When the number of claws is increased, this is more advantageous in terms of ease of assembly and cost than providing individual springs for rotating the separation claws as in the previous embodiment.
く第三実施例〉
次に、分離爪の付勢手段を調整可能にした本発明の第三
実施例を第９図から第１１図を用いて説明する。ここで
、第１Ｏ図は定着フレームカバーの断面図、８１１図は
Ａ−Ａ断面図を示す。なお、前実施例と共通部分には同
一符号を付して説明を省略する。Third Embodiment> Next, a third embodiment of the present invention in which the biasing means of the separating claw can be adjusted will be described with reference to FIGS. 9 to 11. Here, FIG. 1O is a sectional view of the fixing frame cover, and FIG. 811 is a sectional view taken along line A-A. Note that the same parts as those in the previous embodiment are given the same reference numerals, and the description thereof will be omitted.
図において、２１は定着フレームカバー、２２は分離爪
押圧部材、２３はばね押板、２４はセットビス、２５は
ばねである。ばね押板２３及びばね２５は分離爪押圧部
材２２に取り付けられて一つのユニットを形成している
。ここて、ばね押板２３は分離爪押圧部材２２の溝部２
２ｂをガイドとして矢印Ｂ方向に移動可能となっている
。In the figure, 21 is a fixing frame cover, 22 is a separation claw pressing member, 23 is a spring pressing plate, 24 is a set screw, and 25 is a spring. The spring pressing plate 23 and the spring 25 are attached to the separation claw pressing member 22 to form one unit. Here, the spring pressing plate 23 is connected to the groove 2 of the separation claw pressing member 22.
It is movable in the direction of arrow B using 2b as a guide.
また、ばね押板２３及びばね２５を取り付けた分離爪押
圧部材２２は、そのボス部２２ａが定着フレームカバ−
２１の溝部２１ａ内てガイドされ、矢印Ｂ方向に移動可
能に取り付けである。定着排紙部１００ｂか定着装置本
体部１００ａに対して閉じた状態において、セットビス
２４を締めた場合、ばね押板２３はセットビス２４に押
されてＣ方向に移動するか、分離爪押圧部材２２は分離
爪１１によりＣ方向に移動できない。このため、ばね２
５は縮んた状態になり、分離爪１１の定着ローラ２に対
する押圧か増加する。Further, the separation claw pressing member 22 to which the spring pressing plate 23 and the spring 25 are attached has a boss portion 22a that is attached to the fixing frame cover.
It is guided within the groove 21a of No. 21 and is attached movably in the direction of arrow B. When the set screw 24 is tightened while the fixing sheet discharge section 100b is closed with respect to the fixing device main body section 100a, the spring pressing plate 23 is pushed by the set screw 24 and moves in the C direction, or the separation claw pressing member 22 cannot be moved in the C direction due to the separation claw 11. For this reason, spring 2
5 is in a contracted state, and the pressure of the separating claw 11 against the fixing roller 2 increases.
逆に、セットどス２４を緩めた場合、ばね押板２３はば
ね２５に押されてＤ方向に移動するので、ばね２５の圧
縮されている長さが長くなり、分離爪１１の定着ローラ
２に対する押圧か減少する。Conversely, when the set door 24 is loosened, the spring pushing plate 23 is pushed by the spring 25 and moves in the D direction, so the compressed length of the spring 25 becomes longer and the fixing roller 2 of the separating claw 11 The pressure on the area decreases.
したがって、上記構成のように分離爪の定着ローラに対
する付勢手段を調整可能にすることにより、分離爪の定
着ローラに対する接触圧を微妙な範囲で管理することか
てきる。また、分離爪により怪我の防止及び定着ローラ
表面キズ防止につしても前実施例同様の効果がある。Therefore, by making the biasing means for the separating claw against the fixing roller adjustable as in the above configuration, the contact pressure of the separating claw against the fixing roller can be controlled within a delicate range. Furthermore, the separating claws have the same effect as the previous embodiment in terms of preventing injuries and preventing scratches on the surface of the fixing roller.
く第四実施例〉
次に、分離爪を分離爪支持部材に対して上下方向に移動
可能に支持した第四実施例を第１２図及び第１３図を用
いて説明する。なお、前実施例と共通部分には同一符号
を付して再度の説明を省略する。Fourth Embodiment Next, a fourth embodiment in which the separation claw is supported movably in the vertical direction with respect to the separation claw support member will be described with reference to FIGS. 12 and 13. Note that the same parts as in the previous embodiment are given the same reference numerals, and repeated explanation will be omitted.
第１２図において分離爪１１は分離爪支持部材としての
支持ホルダー１４に対して上下方向に移動可能に支持さ
れているか、分離爪支軸１１ａの位置はばね１７により
下方向に付勢力を受けているので通常通紙状態では第１
２図の位置で安定しており、分離爪先端はばね９により
定着ローラ２に圧接する方向に付勢力を受けている。こ
こてばね１７の付勢力は支持ホルタ−を回動して転写材
排出口を開いた際、分離爪先端を定着ローラと離間する
方向に移動させるだけの少ない付勢力で良い。In FIG. 12, the separation claw 11 is supported movably in the vertical direction with respect to a support holder 14 as a separation claw support member, or the position of the separation claw support shaft 11a is biased downward by a spring 17. Therefore, in the normal paper feeding state, the first
It is stable in the position shown in FIG. 2, and the tip of the separating claw is biased by a spring 9 in the direction of pressing against the fixing roller 2. The biasing force of the spring 17 may be small enough to move the tip of the separating claw in the direction away from the fixing roller when the support halter is rotated to open the transfer material discharge port.
次に、第１３図に示すように転写材Ｐか分離爪先端に引
っかかりジャムか起きた場合には、転写材Ｐにより分離
爪１１を押す力かばね９，１３のばね力より大きくなる
と、分離爪１１は転写材Ｐによりもち上けられ定着ロー
ラ表面から離れる。そして、ジャム処理のために定着排
紙部１００ｂを支軸７を中心に回動すると分離爪１１ば
ばね１７により分離爪先端が定着ローラと離間する方向
に回動するとともに、転写材Ｐによりもち上げられてい
た分離爪支軸１１ａの位置は支持ホルダー１４の通常通
紙状態の位置に戻る。Next, as shown in FIG. 13, if the transfer material P gets caught on the tip of the separation claw and a jam occurs, the separation claw 11 is lifted up by the transfer material P and separated from the surface of the fixing roller. Then, when the fixing paper discharge section 100b is rotated around the support shaft 7 for jam removal, the separating claw 11 spring 17 rotates the separating claw tip in a direction to separate it from the fixing roller, and the transfer material P is held in place. The raised position of the separation claw support shaft 11a returns to the normal paper passing position of the support holder 14.
また、分離爪１１は転写材Ｐによりもち上げられ支持ホ
ルダー１４に対し上下方向に移動するが、分離爪支軸１
１ａか支持ホルダー１４から抜けるのを防止するために
、支持ホルダーの分離爪支持部１４ａの分離爪支軸の挿
入入口付近の幅か分離爪支軸１１ａの直径より狭くなっ
ている。逆に、分離爪の取り付けは分離爪支軸１１ａか
Ｄ形になっており、分離爪支軸の最ｌＪ・径は支持ホル
タ−の分離爪支持部１４ａの前記の幅より狭くなってい
るのて、容易に取り付けることかてきる。Further, the separation claw 11 is lifted up by the transfer material P and moves vertically with respect to the support holder 14, but the separation claw support shaft 1
1a from the support holder 14, the width of the separation claw support portion 14a of the support holder near the insertion entrance of the separation claw support shaft is narrower than the diameter of the separation claw support shaft 11a. On the other hand, the separation claw is attached to the separation claw support shaft 11a or D-shaped, and the maximum diameter of the separation claw support shaft is narrower than the above-mentioned width of the separation claw support portion 14a of the support holter. It can be easily installed.
したかって、分離爪を分離爪支持部材としての支持ホル
ダーに移動可能に取り付けることにより、転写材が分離
爪先端に引っ掛かりジャムを起した場合においても、分
離爪先端か定着ローラ表面から離れるので、定着ローラ
に食い込んで定着ローラ表面を傷つけることはない。ま
た、分離爪による怪我の防止及び定着排紙部の開閉の際
の定着ローラ表面キズ防止についても前実施例同様の効
果かある。Therefore, by movably attaching the separation claw to a support holder that serves as a separation claw support member, even if the transfer material gets caught on the separation claw tip and causes a jam, the separation claw tip will separate from the fixing roller surface, allowing the fixing to proceed. It will not bite into the roller and damage the surface of the fixing roller. In addition, the same effects as in the previous embodiment can be achieved in terms of preventing injuries caused by the separating claws and preventing scratches on the surface of the fixing roller when opening and closing the fixing paper discharge section.
［発明の効果］
以上説明したように、本発明は、分離爪を定着ローラに
圧接させるための付勢手段を、分離爪を支持する分離爪
支持部材と別ユニットである定着ローラ支持部材に設け
ると共に、定着ローラ支持部材に回動自在に取り付けら
れている分離爪支持部材を回動して転写材排出口を開い
た際、分離爪を定着ローラに対し離間するための付勢手
段を設けるかあるいは分離爪の自重により、分離爪か定
着ローラに対し離間する方向に移動する構成にすること
にしたのて、ジャム処理の際に誤って分離爪に手を引っ
掛けて怪我をすることがない。[Effects of the Invention] As described above, the present invention provides a biasing means for pressing the separation claw against the fixing roller in the fixing roller support member, which is a separate unit from the separation claw support member that supports the separation claw. In addition, when the separation claw support member rotatably attached to the fixing roller support member is rotated to open the transfer material discharge port, a biasing means is provided to separate the separation claw from the fixing roller. Alternatively, by adopting a structure in which the separating claw moves in a direction away from the fixing roller due to its own weight, there is no chance of injury due to a hand accidentally getting caught in the separating claw during jam clearance.
また、分離爪支持部材を定着ローラ支持部材に対して回
動する際にも、分離爪は定着ローラ表面を傷つけること
はなく、定着ローラの長寿命化さらには定着装置の長寿
命化につながる。Further, even when the separating claw supporting member is rotated relative to the fixing roller supporting member, the separating claw does not damage the surface of the fixing roller, leading to a longer life of the fixing roller and a longer life of the fixing device.
さらに、分離爪を分離爪支持部材に対し移動可能に支持
することも可能であり、ジャムを起して転写材から一定
以上の力を分離爪か受けると、分離爪先端は定着ローラ
表面に食い込まずに離れるのて、−層確実に定着ローラ
表面を傷つけることかなくなる。Furthermore, it is also possible to support the separation claw movably with respect to the separation claw support member, and if a jam occurs and the separation claw receives a force above a certain level from the transfer material, the tip of the separation claw will bite into the surface of the fixing roller. By separating the fixing roller without any damage, the -layer can be removed without damaging the surface of the fixing roller.
第１図は本発明の第一実施例の転写材排出口を閉じた状
態での断面図、第２図は本発明の第一実施例の転写材排
出口を開いた状態での断面図、第３図は第一実施例の定
着排紙部の正面図。
第４図は第一実施例の分離爪を回転する付勢手段の詳細
図、第５図は第二実施例の転写材排出口を閉じた状態て
の断面図、第６，８図は第二実施例の転写材排出口を開
いた状態ての断面図、第７図は第二実施例の定着排紙部
の正面図、第９図は第三実施例の断面図、第１Ｏ図は第
三実施例の定着フレームカバーの断面図、第１１図は第
９図のＡ−Ａ断面図、第１２図は第四実施例の通常通紙
状態の断面図、第１３図は第四実施例のジャム時の断面
図、第１４図は従来例の転写材排出口を閉した状態ての
断面図、第１５図は従来例の転写材排出口を開いた状態
での断面図である。
ｌ・・・・・・・・・・・・定着ローラ支持部材（支持
側板）２・・・・・・・・・・・・定着ローラ３・・・
・・・・・・・・・加圧ローラ９・・・・・・・−・・
・・第一の付勢手段（ばね）１１・・・・・・・・・・
・・分離爪
１４・・・・・・・・・・・・分離爪支持部材（支持ホ
ルダー）１７；１９・・・・・・第二の付勢手段（ばね
）Ｐ・・・・・・・・・・・・転写材FIG. 1 is a cross-sectional view of the first embodiment of the present invention with the transfer material discharge port closed, and FIG. 2 is a cross-sectional view of the first embodiment of the present invention with the transfer material discharge port open. FIG. 3 is a front view of the fixing sheet discharge section of the first embodiment. Fig. 4 is a detailed view of the urging means for rotating the separation claw of the first embodiment, Fig. 5 is a sectional view of the second embodiment with the transfer material discharge port closed, and Figs. 7 is a front view of the fixing paper discharge section of the second embodiment, FIG. 9 is a sectional view of the third embodiment, and FIG. 11 is a sectional view taken along the line A-A in FIG. 9, FIG. 12 is a sectional view of the fourth embodiment in a normal paper passing state, and FIG. 13 is a sectional view of the fourth embodiment. FIG. 14 is a cross-sectional view of the conventional example with the transfer material outlet closed, and FIG. 15 is a cross-sectional view of the conventional example with the transfer material outlet open. l...Fixing roller support member (support side plate) 2...Fixing roller 3...
・・・・・・・・・Pressure roller 9・・・・・・・−・・
...First biasing means (spring) 11...
...Separation claw 14...Separation claw support member (support holder) 17;19...Second biasing means (spring) P...・・・・・・Transfer material
Claims (1)
ローラに圧接し転写材を分離するための分離爪を支持す
る分離爪支持部材とを有し、上記分離爪支持部材は、上
記定着ローラ支持部材に対して、上記分離爪が定着ロー
ラに圧接する第一の位置と、定着ローラから離れた第二
の位置との間で移動可能に分離爪を支持している定着装
置において、 上記定着ローラ支持部材に、分離爪を定着ローラに圧接
する方向に付勢する第一の付勢手段を設け、 上記分離爪は、第一の位置にて、上記第一の付勢手段に
より定着ローラに圧接し、第二の位置にて定着ローラと
離反する方向に付勢する第二の付勢手段を備えているか
、あるいは分離爪の自重により定着ローラと離反する方
向に移動するように設定されている、 ことを特徴とする定着装置。[Scope of Claims] A fixing roller support member that supports a fixing roller, and a separation claw support member that supports a separation claw that is in pressure contact with the fixing roller and separates the transfer material, the separation claw support member being , a fixing device supporting the separating claw so as to be movable with respect to the fixing roller supporting member between a first position where the separating claw is in pressure contact with the fixing roller and a second position away from the fixing roller. The fixing roller support member is provided with a first biasing means for biasing the separation claw in a direction to press the separation claw against the fixing roller, and the separation claw is set in the first position by the first biasing means. The device is provided with a second biasing means that presses against the fixing roller and biases it in a direction away from the fixing roller at the second position, or moves in a direction away from the fixing roller due to the weight of the separating claw. A fixing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16128090A JPH0452676A (en) | 1990-06-21 | 1990-06-21 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16128090A JPH0452676A (en) | 1990-06-21 | 1990-06-21 | Fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452676A true JPH0452676A (en) | 1992-02-20 |
Family
ID=15732110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16128090A Pending JPH0452676A (en) | 1990-06-21 | 1990-06-21 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452676A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008134409A (en) * | 2006-11-28 | 2008-06-12 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
| US7496316B2 (en) | 2005-01-25 | 2009-02-24 | Kyocera Mita Corporation | Image forming apparatus including an openable section and separating mechanism with cam |
| US8107865B2 (en) | 2005-06-01 | 2012-01-31 | Samsung Electronics Co., Ltd. | Image forming apparatus and fixing device |
-
1990
- 1990-06-21 JP JP16128090A patent/JPH0452676A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7496316B2 (en) | 2005-01-25 | 2009-02-24 | Kyocera Mita Corporation | Image forming apparatus including an openable section and separating mechanism with cam |
| US8107865B2 (en) | 2005-06-01 | 2012-01-31 | Samsung Electronics Co., Ltd. | Image forming apparatus and fixing device |
| JP2008134409A (en) * | 2006-11-28 | 2008-06-12 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
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