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JPS6086575A - Pressure driving device - Google Patents

Pressure driving device

Info

Publication number
JPS6086575A
JPS6086575A JP19575983A JP19575983A JPS6086575A JP S6086575 A JPS6086575 A JP S6086575A JP 19575983 A JP19575983 A JP 19575983A JP 19575983 A JP19575983 A JP 19575983A JP S6086575 A JPS6086575 A JP S6086575A
Authority
JP
Japan
Prior art keywords
speed
fixing
gear
drive
driving force
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
Application number
JP19575983A
Other languages
Japanese (ja)
Inventor
Kenji Yoshinaga
憲治 吉永
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP19575983A priority Critical patent/JPS6086575A/en
Publication of JPS6086575A publication Critical patent/JPS6086575A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/20Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2092Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using pressure only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

PURPOSE:To obtain high reliability by constituting a titled device so that a driving force transfer means can be rotated at a speed of two stages of fast/ slow, and using a rotation driving force of a slow speed in the course of a pressure operation of a roller of a fixing device. CONSTITUTION:In a pressure state as shown in the figure, a driving force transfer in a speed change driving device is changed to the first fixing speed transfer by gear trains 2, 3, 4, 6, 16 and 20 of a high-speed mode from a low speed mode of gear trains 2, 9, 10, 12, 13, 14 and 18 by a start of an electric conduction to a clutch 7, by which fixing is executed by the first fixing speed. When an operation of a fixing device is ended, a power source of a motor of the speed change driving device is cut, an electric conduction of a plunger 58 and the clutch 7 is cut, and in this case, the motor of the speed change driving device continues a rotation only for a little while by an inertia torque, but this rotation force is transferred to the fixing device through the gear train of the side related to the second fixing speed. In this way, the device is directly connected mechanically, therefore, a sufficient transfer torque and high reliability can be obtained.

Description

【発明の詳細な説明】 本発明はローシャベルト等の回転体とこの回転体に当接
する部材との加圧と、回転体の異なる速度での駆動と、
を回転駆動の利用で達成する加圧駆動装置に関し、特に
画像形成装置の定着用ローラ対や像担持用の回転体とク
リーニング部材や定着用ローラと塗希部材或いはクリー
ニング部材等に有効な加圧駆動装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention applies pressure between a rotating body such as a Rocha belt and a member that comes into contact with the rotating body, drives the rotating body at different speeds,
Regarding a pressure drive device that achieves this by using rotational drive, it is particularly effective for applying pressure to a pair of fixing rollers in an image forming apparatus, a rotating body for image bearing, a cleaning member, a fixing roller, a coating member, a cleaning member, etc. It relates to a drive device.

本発明は、加圧と駆動を合理的に達成する装置全般に使
用可能であるが、以下の説明は特に本発明が有効である
画像形成装置に関して行う。
Although the present invention can be used in any device that reasonably achieves pressurization and driving, the following description will be made with respect to an image forming apparatus to which the present invention is particularly effective.

画像形成装置のうち代表的なものには、電子写真装置が
ある。この装置は一般に像担持用回転体としての感光層
を備える感光ドラム(又は感光ベルト)上にトナー像を
形成し、定着用回転体としてのベルトやローラにより記
録材上に定着するように構成されている0 この定着は加熱、加熱加圧、或いは圧力のみの作用で行
表われるが、その定着性は記録材の材質や記録材上のト
ナー像の材質、トナー量に影響を受ける0特に熱的に定
着を行う場合、記録材の熱容量、熱伝導性及び表面性等
が画像に影響を与える。この解決策として特公昭56−
11957号にもあるように記録材の厚みに応じた定着
速度の切換えが提案されているO この種の速度切換えには変倍光学系にからんだ像担持体
用回転体の速度切換もあるO 又、これらの回転体にはクリーニング部材やオフセット
防止液塗布用の部材等の当接部材力f設けられている。
A typical image forming apparatus is an electrophotographic apparatus. This device is generally configured to form a toner image on a photosensitive drum (or photosensitive belt) equipped with a photosensitive layer as a rotating body for carrying an image, and to fix the toner image on a recording material using a belt or roller as a rotating body for fixing. 0 This fixing is performed by heat, heat and pressure, or only pressure, but the fixing performance is affected by the material of the recording material, the material of the toner image on the recording material, and the amount of toner. When fixing the image, the heat capacity, thermal conductivity, surface properties, etc. of the recording material affect the image. As a solution to this problem,
As stated in No. 11957, it has been proposed to change the fixing speed according to the thickness of the recording material.O This type of speed change also includes changing the speed of the rotating body for the image carrier involved in the variable magnification optical system. O These rotating bodies are also provided with a contact member force f such as a cleaning member and a member for applying anti-offset liquid.

特に定着用回転体としての加熱ローラ対の場合は、互い
に加圧状態にある時に記録材を挟持搬送することで定着
処理を行なうの力(一般的である。
In particular, in the case of a pair of heating rollers serving as a rotating body for fixing, the force (generally used) that performs the fixing process by sandwiching and conveying the recording material when they are in a pressurized state with each other.

ところがこのような回転体に当接する部材を回転体に常
時圧接しておくと、回転体表面の当接部に局部的な変形
が生じ多くの不都合を招く。この不都合は、回転体に対
して当接部材を接離させたり、又はその圧力に強弱をつ
けたりすることで解決できる。
However, if such a member that comes into contact with the rotating body is kept in pressure contact with the rotating body at all times, local deformation occurs at the abutting portion on the surface of the rotating body, resulting in many inconveniences. This inconvenience can be solved by moving the abutting member toward and away from the rotating body, or by varying the strength of the pressure.

一方、装置全体の合理化がめられる中にあって、この速
度切換ととの当接部材の圧調整は同一駆動源からの回転
駆動力を利用して同時に行なわれており、駆動伝達手段
としてはギア列、電磁クラッチ等の着脱可能な保合手段
、一方向性伝達部材(例えばワンウェイクラッチ)等の
伝達部材が用いられている。
On the other hand, as the entire device is being rationalized, speed switching and pressure adjustment of the contact members are performed simultaneously using rotational driving force from the same driving source, and gears are used as the drive transmission means. A transmission member such as a train, a removable retaining means such as an electromagnetic clutch, and a unidirectional transmission member (for example, a one-way clutch) is used.

定着装置の例をみれば、同一の駆動源から供給される駆
動力の一部が第1定着速度(高速側)K関与するギヤ列
と電磁クラッチを介して出力軸に伝達され、上記駆動力
の他の一部が第2定着速度(低速側)に関与し、減速機
能を有するギヤ列とワンウェイクラッチを介して出力軸
へ伝達されるものである。このような変速駆動装置は、
上記電磁クラッチが着状態の時に第1定着速度に相当す
る回転速度が出力軸に得られ、上記電磁クラッチが脱状
態の時に第2定着速度に相当する回転速度が出力軸に得
られる。この時、回転軸の速度が大きい第1速度の時よ
り大きいトルクがかかる0以上のような同一の駆動系か
らローラの駆動と加圧機構の駆動を得る場合、画像形成
装置本体または定着装置の電源投入直後にローラの駆動
と加圧動作が同時に行なわれ、加圧が完了すると前記駆
動系は加圧機構への駆動力伝達を中断し、ローラの駆動
のみ関与するようになるのが普通である。
Taking the example of a fixing device, a part of the driving force supplied from the same driving source is transmitted to the output shaft via the gear train and electromagnetic clutch involved in the first fixing speed (high speed side), and the driving force is The other part is involved in the second fixing speed (low speed side) and is transmitted to the output shaft via a gear train having a speed reduction function and a one-way clutch. Such a variable speed drive device is
When the electromagnetic clutch is engaged, a rotational speed corresponding to the first fixing speed is obtained on the output shaft, and when the electromagnetic clutch is disengaged, a rotational speed corresponding to the second fixing speed is obtained on the output shaft. At this time, if the roller drive and the pressure mechanism are driven from the same drive system, such as 0 or more, which applies a larger torque than when the rotating shaft speed is high at the first speed, the image forming apparatus main body or the fixing device Immediately after the power is turned on, the roller drive and pressurizing operation are performed at the same time, and when the pressurization is completed, the drive system interrupts the transmission of driving force to the pressurizing mechanism and becomes involved only in driving the roller. be.

すなわち、定着装置が作動準備完了までは前記2通りの
箇所へ駆動力を供給しなければならず、この間、上記駆
動系は最も大きい駆動トルりを伝達することになる。一
方ローラの回転速度においては画像形成装置本体または
定着装置の電源投入直後は使用頻度の多い第1定着速度
になるように電磁クラッチが着状態になっている。この
ため、上記に示した最も大きい駆動力を伝達するときは
最大トルクがかかるのでかならず電磁クラッチのような
着脱自在の駆動伝達係合部材を介さなければならない。
That is, until the fixing device is ready for operation, driving force must be supplied to the two locations, and during this time, the drive system transmits the largest driving torque. On the other hand, regarding the rotational speed of the roller, the electromagnetic clutch is in an engaged state so that the first fixing speed, which is frequently used, is set immediately after power is turned on to the main body of the image forming apparatus or the fixing device. Therefore, when transmitting the largest driving force shown above, the maximum torque is applied, so a detachable drive transmission engagement member such as an electromagnetic clutch must be used.

したがって、上記の最大駆動トルクを十分に伝達し得る
高価で大きな電磁クラッチ等の保合部材を用意しなけれ
ばならず、必然的に電磁クラッチ等の保合部材は大容量
化し消費電力は大きくなり形状も大型化する。また価格
もこれに見合って高くなる。したがって小屋で軽量であ
って消費電力の小さく安価な変速駆動を達成できる加圧
駆動装置を供給できない。
Therefore, it is necessary to prepare a retaining member such as an expensive and large electromagnetic clutch that can sufficiently transmit the maximum drive torque mentioned above, and as a result, the capacity of the retaining member such as the electromagnetic clutch inevitably becomes large and the power consumption increases. The shape will also become larger. Also, the price will be correspondingly high. Therefore, it is not possible to provide a pressurized drive device that is lightweight, consumes little power, and can achieve inexpensive variable speed drive in a shed.

本発明は上記問題点を解決し、定着装置はもとより、種
々の回転体の回転変速制御と回転体に当接する部材の接
離又は圧接力の強弱の制御とを簡単に且つ小型軽量であ
って安価で消費電力も小さくできる加圧駆動装置を提供
することを目的とする0 本発明はこの目的を達成するためK、 [回転駆動力を利用して回転体と回転体に当接する部材
を加圧接触させる加圧機構と、この回転駆動力を伝達す
る駆動力伝達手段と、を有し駆動力伝達手段によって上
記回転体の回転と上記加圧とを111行なう加圧駆動装
置において、上記駆動力伝達手段は上記回転体を所定速
度で回転させるための着脱可能な駆動伝達用の係合手段
を備える第1駆動伝達手段と、上記回転体をこの所定速
度とは異なる速度で回転させるための一方向性伝達部材
を備える第2駆動手段と、上記回転体を上記所定速度に
回転する際に第2駆動手段により上記回転体を回転させ
且つ上記加圧接触を行った後第1駆動手段により上記回
転体を所定速度に回転させる変速駆動機構と、を有して
いることを特徴とする加圧駆動装置。」である0つまり
、本発明は駆動伝達系にかかる負荷を集中させないよう
に、高速モードでの回転制御前に低速上〜ドでの回転に
よる加圧を行ない、その後で低速モードから高速モード
へ変換する点に特徴がある。
The present invention solves the above-mentioned problems, and can easily control not only the fixing device but also the rotational speed of various rotating bodies, the contact and separation of members that contact the rotating body, and the strength and weakness of the pressure force. It is an object of the present invention to provide a pressurizing drive device that is inexpensive and has low power consumption. In the pressurizing drive device, which has a pressurizing mechanism that makes pressure contact and a driving force transmitting means that transmits the rotational driving force, the driving force transmitting means performs the rotation of the rotating body and the pressurizing 111 times. The force transmitting means includes a first drive transmitting means including a detachable drive transmitting engagement means for rotating the rotary body at a predetermined speed, and a first drive transmitting means for rotating the rotary body at a speed different from the predetermined speed. a second drive means including a unidirectional transmission member; and after the second drive means rotates the rotor when the rotor is rotated to the predetermined speed and the pressurized contact is made, the first drive means A pressurizing drive device comprising: a variable speed drive mechanism that rotates the rotating body at a predetermined speed. In other words, in order to avoid concentrating the load on the drive transmission system, the present invention applies pressure by rotating at low speeds before controlling rotation in high speed mode, and then shifts from low speed mode to high speed mode. It is characterized by conversion.

以下、本発明の実施例について図面を参照しながら説明
する。
Embodiments of the present invention will be described below with reference to the drawings.

まず、第1図の構成を以下説明する。構成要素の番号1
〜20までが変速駆動装置、番号21〜26までが定着
装置の駆動入力部分を示す。変速駆動装置は不図示のモ
ータを駆動源としてその回転力を入力軸1で供給される
。ギヤ2とギヤ3は入力Mlに同定されている。ギヤ4
はギヤ3に噛合いクラッチ軸5に固定されている。7a
、7b及び7cは電磁クラッチ7の構成要素を示し、そ
れぞれアーマチニア、ロータ、電磁クラッチ本体である
。アーマチュア7aはギヤ6とクラッチ軸5に対して同
心伏に固定され、通常両者はクラッチ軸5に対して回転
自在である。ロータ7bはクラッチ軸5に固定されてい
る。電磁クラッチ本体7cけクラッチ軸5に対して回転
自在であり、電磁クラッチ本体7cが通電されて励磁す
ると磁力によりアーマチュア7aがロータ7bと接触し
、その摩擦力によってロータ7bとアーマチュア7aが
一体となって回転することが可能となる。したがって、
この時、クラッチ軸5の回転力はロータ7b、アーマチ
ュア7aを介してギヤ6へ伝達する。ギヤ9とギヤ10
は軸8に固定され、この内、ギヤ9けギヤ2と噛み合っ
ている。ギヤ12とギヤ13は軸11に固定され、この
内、ギヤ12はギヤ10と噛み合っている。ギヤ14は
軸15に固定され、かつギヤ13と噛み合っている。ギ
ヤ16は軸17に固定され、かつギヤ6と噛み合ってい
る。ギヤ18はギヤ14と噛み合い、ワンウェイクラッ
チ19を介して出力軸17に支持されている。このワン
ウェイクラッチ19は所定の回転方向において、ギヤ1
8が出力軸171C比べて相対的に回転速度か速い場合
、もしくは、出力軸17が負荷として作用する場合はギ
ヤ18の回転力が出力軸17へ伝達されるが、逆忙出力
軸17がギヤ18より相対的に回転速度が速い場合はそ
の回転方向においてギヤ18は出力軸17に対して回転
自在となり、ギヤ18の回転力は出力軸17へ伝達され
ない。出力軸17の端部には噛み合いクラッチ20が固
定されている。以上が定着装置用の変速駆動装置である
First, the configuration of FIG. 1 will be explained below. Component number 1
20 to 20 are variable speed drive devices, and numbers 21 to 26 are drive input portions of the fixing device. The variable speed drive device uses a motor (not shown) as a drive source, and its rotational force is supplied through an input shaft 1. Gear 2 and gear 3 are identified to input Ml. gear 4
meshes with the gear 3 and is fixed to the clutch shaft 5. 7a
, 7b and 7c indicate the components of the electromagnetic clutch 7, which are an armature, a rotor, and an electromagnetic clutch body, respectively. The armature 7a is fixed concentrically to the gear 6 and the clutch shaft 5, and both are normally rotatable relative to the clutch shaft 5. The rotor 7b is fixed to the clutch shaft 5. The electromagnetic clutch body 7c is rotatable with respect to the clutch shaft 5, and when the electromagnetic clutch body 7c is energized and excited, the armature 7a comes into contact with the rotor 7b due to magnetic force, and the rotor 7b and armature 7a are integrated by the frictional force. It is now possible to rotate. therefore,
At this time, the rotational force of the clutch shaft 5 is transmitted to the gear 6 via the rotor 7b and armature 7a. gear 9 and gear 10
is fixed to the shaft 8, of which nine gears mesh with the gear 2. Gear 12 and gear 13 are fixed to shaft 11, and gear 12 meshes with gear 10. Gear 14 is fixed to shaft 15 and meshes with gear 13. Gear 16 is fixed to shaft 17 and meshes with gear 6. The gear 18 meshes with the gear 14 and is supported by the output shaft 17 via a one-way clutch 19. This one-way clutch 19 rotates gear 1 in a predetermined direction of rotation.
8 is relatively faster than the output shaft 171C, or when the output shaft 17 acts as a load, the rotational force of the gear 18 is transmitted to the output shaft 17. When the rotational speed is relatively faster than that of the gear 18, the gear 18 becomes rotatable relative to the output shaft 17 in that direction of rotation, and the rotational force of the gear 18 is not transmitted to the output shaft 17. A dog clutch 20 is fixed to the end of the output shaft 17. The above is the variable speed drive device for the fixing device.

一方、定着装置は前記変速駆動装置から駆動力を得てロ
ーラの加圧及びローラの回転を行う。噛み合いクラッチ
21は駆動力伝達用の軸23&C固定され、出力#11
7と同軸延長上にあり、対向する噛み合いクラッチ20
との噛み合いが可能で、変速駆動装置の出力軸17の回
転力を供給される。
On the other hand, the fixing device receives driving force from the variable speed drive device to apply pressure to the roller and rotate the roller. The dog clutch 21 is fixed to a shaft 23&C for transmitting driving force, and has an output #11.
7 and a dog clutch 20 which is on the coaxial extension and is opposed to
The rotational force of the output shaft 17 of the variable speed drive device is supplied.

ギヤ22は軸21に固定され、ギヤ25と噛み合ってい
る。ギヤ25は、制御環24と制御環24の内部にある
コイル状ばね(不図示)で構成されるばねクラッチを介
して軸26に支持されている。
Gear 22 is fixed to shaft 21 and meshes with gear 25. The gear 25 is supported by the shaft 26 via a spring clutch comprised of a control ring 24 and a coiled spring (not shown) inside the control ring 24 .

制御レバー50は定着装置本体に固定された支軸52に
回動自在に支持されている。制御レバー5゜の一端には
ビン51が制御環24の方向に突出して固定され、制御
m24の回転と制御レバー50の回動によってピン51
は制御環24上の制御爪24aまたは24bと係合可能
な位置関係にある。
The control lever 50 is rotatably supported by a support shaft 52 fixed to the main body of the fixing device. A pin 51 is fixed to one end of the control lever 5° so as to protrude in the direction of the control ring 24, and the pin 51 is rotated by rotation of the control m24 and rotation of the control lever 50.
is in a positional relationship that allows it to engage with the control pawl 24a or 24b on the control ring 24.

制御レバー50の他端にはビン53が固定され、このピ
ン56に回動自在にアーム57が支持され、アーム57
の他端はプシンジャー58 )C結合されている0制御
レバー50上の支uJ52とビン56の間にはビン55
が同定され、ピン55には引張りばね54が掛けられて
いる。また引張りばね54の他端は定着装置本体に固定
されるピン56に掛けられ、引張りばね54の収縮力に
より制御レバー50が時計方向に回動する付勢力が働く
。一方プランジャー58が通電されるとアーム57を介
して制御レバー50に反時計方向の回動力が働く。
A pin 53 is fixed to the other end of the control lever 50, and an arm 57 is rotatably supported by this pin 56.
The other end is a pusher 58). Between the support uJ52 on the 0 control lever 50, which is coupled to the pin 56, and the pin 56, there is a pin 55.
is identified, and a tension spring 54 is applied to the pin 55. The other end of the tension spring 54 is hung on a pin 56 fixed to the main body of the fixing device, and the contraction force of the tension spring 54 exerts an urging force to rotate the control lever 50 clockwise. On the other hand, when the plunger 58 is energized, a counterclockwise rotational force acts on the control lever 50 via the arm 57.

これにより制御環24は通常ギヤ25と共に回転し、こ
のときばねクラッチはギヤ25の回転トルクを軸26へ
伝達するOしかし制御し/<−50上のピン51が制御
爪24aまたは制御爪241)と係合し制御環24の回
転が止められると、はねクラッチは脱状態になってギヤ
25の回転トルクを軸26へ伝達しなくなる0軸26に
は加圧力ム27が固定され、上記ばねクラッチでその回
転が制御される。
As a result, the control ring 24 normally rotates together with the gear 25, and at this time the spring clutch transmits the rotational torque of the gear 25 to the shaft 26. When the rotation of the control ring 24 is stopped, the spring clutch is disengaged and the rotational torque of the gear 25 is no longer transmitted to the shaft 26. Its rotation is controlled by a clutch.

第1図の加圧力ム27により加圧される定着装置の定着
用ローラ対28.29につ〜・て第2図(ローラ脱状態
)、第3図(ローラ圧接状態)及びカム27の動きを説
明する第4,5図を用いてさらに説明する。
Regarding the pair of fixing rollers 28 and 29 of the fixing device that are pressurized by the pressure ram 27 in FIG. 1, FIG. 2 (roller detached state), FIG. This will be further explained with reference to FIGS. 4 and 5.

o−528の軸30はベアノ・ウス32内のベアリング
61で支持されている。ベアノ・ウス32は中心軸64
を中心に回動する回動板63に固定されている。したが
ってロー228は軸50を中心に回転可能でかつ中心軸
34を中心に回動する。回動板33にはビン35が固定
され、このピン35に回転自在に引張板36が連結する
。引張板36の他端は回動腕38に固定されたピン67
に回転自在に連結する0回動腕38は定着装置本体に固
定された軸39を中心に回動可能である。またその他端
にピン40が固定され、カム27に対向し接触可能な位
置にある。この加圧力ム27は2つの円弧27aと27
bで構成される外形状を成しており、円弧27aの中心
は軸26の中心と一致するが、円弧27bの中心は軸2
6に対して円弧27aより偏心している。ビン40は加
圧機構と連結し、加圧力ム27の外周に接触して作用力
を受け、加圧力ム27の回転中心41がらの相対位置を
制御されることによって加圧機構の着脱が制御される。
The o-528 shaft 30 is supported on a bearing 61 within the beano-us 32. Beano-Us 32 has a central axis 64
It is fixed to a rotating plate 63 that rotates around . Therefore, the row 228 is rotatable about the shaft 50 and rotates about the central shaft 34. A pin 35 is fixed to the rotating plate 33, and a tension plate 36 is rotatably connected to the pin 35. The other end of the tension plate 36 has a pin 67 fixed to the rotating arm 38.
A zero rotation arm 38 rotatably connected to the fixing device body is rotatable about a shaft 39 fixed to the main body of the fixing device. Further, a pin 40 is fixed to the other end and is located at a position opposite to the cam 27 so that it can come into contact with it. This pressure ram 27 has two circular arcs 27a and 27
The center of the arc 27a coincides with the center of the shaft 26, but the center of the arc 27b coincides with the center of the shaft 26.
6, it is eccentric from the circular arc 27a. The bottle 40 is connected to the pressurizing mechanism, contacts the outer periphery of the pressurizing force arm 27 and receives an acting force, and the relative position of the pressurizing force arm 27 with respect to the rotation center 41 is controlled, thereby controlling attachment and detachment of the pressurizing mechanism. be done.

定着装置の作動開始前はローラの加圧は第2図に示すよ
うに脱状態である。加圧力ム27はギヤ25からの回動
力を受けないので回動腕68上のピン40に作用しない
位置にある。この時回動腕38には回動力が何ら鋤かな
いので引張板36を介してビン35とビン37の間に作
用力もない0この時ローラ28はローラ29上に乗って
いるだけであって、回動板33の回動位置は、ベアリン
グ31とペアハウス32を介して上記ローラ28の軸3
0に対応する位置にあり、特別な作用力をロー228に
与えるものではない0このときのローラ28とローラ2
9間にはローラ28と回動板33等の加圧機構の自重が
作用するのみであって、積極的な加圧力は与えてい々い
Before the fixing device starts operating, the pressure applied to the roller is in a released state as shown in FIG. Since the pressurizing arm 27 does not receive rotational force from the gear 25, it is in a position where it does not act on the pin 40 on the rotating arm 68. At this time, the rotating arm 38 does not have any rotational force, so there is no force acting between the bins 35 and 37 via the tension plate 36. At this time, the roller 28 is only riding on the roller 29, The rotating position of the rotating plate 33 is determined by the shaft 3 of the roller 28 via the bearing 31 and the pair house 32.
0 and does not apply any special acting force to the roller 228. The roller 28 and roller 2 at this time
9, only the weight of the pressure mechanism such as the roller 28 and the rotary plate 33 acts, and no positive pressure can be applied.

次に定着装置が作動を開始したときを第1図。Next, FIG. 1 shows when the fixing device starts operating.

第4,5図で説明する。使用頻度の多い定着速度である
第1定着速度(高速モード)の場合、画像形成装置本体
もしくは定着装置の電源投入の後、まず第2定着速度と
なり加圧を行った後第1定着速度が得られるようになっ
ている。すなわち画像形成装置本体もしくは定着装置の
電源投入の直後に電磁クラッチ7は通電されず、噛合ク
ラッチ21にはギヤ列2,9,10,12,13,14
゜18からの第2定着速度(低速モード)に対応する回
転駆動力が伝達される。またこの時にはローラの加圧も
行うのでこの時も電磁クラッチ7は通電状態にされる。
This will be explained in FIGS. 4 and 5. In the case of the first fixing speed (high speed mode), which is a frequently used fixing speed, after the image forming apparatus main body or the fixing device is powered on, the second fixing speed is first applied, and then the first fixing speed is reached. It is now possible to That is, the electromagnetic clutch 7 is not energized immediately after power is turned on to the main body of the image forming apparatus or the fixing device, and the dog clutch 21 is connected to the gear trains 2, 9, 10, 12, 13, 14.
A rotational driving force corresponding to the second fixing speed (low speed mode) from .degree. 18 is transmitted. Further, since the rollers are also pressurized at this time, the electromagnetic clutch 7 is kept energized at this time as well.

そのため噛合クラッチ21へ供給される回転駆動力(ギ
ヤ列2,9,10,12゜13.14による)は軸23
を介してローラの回転へ寄与する駆動力とギヤ25と軸
26を介しカム27を回転してローラを加圧する駆動力
との両者を同時に満たすものである。カム27が回転し
て行くとまず第4図で円弧27t)の部分がピン40に
接触し、ビン40を作用力Fの方向に押す。これによっ
て回動腕38は時計方向の回動力が付与される。これに
つれて回動腕38上のビン37は下方へ下がり、引張板
36を介してローラ支持板33上のピン35が下方へ引
かれ、ローラ支持板33は時計方向へ回動する。このロ
ーラ支持板33の回動と共にローラ28は下方へ移動し
てローラ29に対して加圧が開始される。さらにカム2
7の回転が進みカム27上の円弧27aの中央付近がビ
ン40と接触する位置関係になると、電磁クラッチ24
の通電は断たれ、ギヤ25の回転は軸26へ伝達しなく
なってカム27の回転が止まり、この位[関係で加圧が
終了する0 この第3図の加圧状態が得られると、上目己変速駆動装
置における駆動力伝達は、クラッチ7への通電開始によ
りギヤ列2.9.10.12+1!l。
Therefore, the rotational driving force (due to the gear trains 2, 9, 10, 12° 13.14) supplied to the dog clutch 21 is transmitted to the shaft 23.
This simultaneously satisfies both the driving force that contributes to the rotation of the roller via the gear 25 and the driving force that rotates the cam 27 and pressurizes the roller via the gear 25 and shaft 26. As the cam 27 rotates, the arc 27t) in FIG. 4 first comes into contact with the pin 40 and pushes the bottle 40 in the direction of the acting force F. As a result, a clockwise rotational force is applied to the rotating arm 38. Accordingly, the bottle 37 on the rotating arm 38 moves downward, the pin 35 on the roller support plate 33 is pulled downward via the tension plate 36, and the roller support plate 33 rotates clockwise. Along with this rotation of the roller support plate 33, the roller 28 moves downward and pressure starts to be applied to the roller 29. Furthermore cam 2
7 continues to rotate, and when the position near the center of the arc 27a on the cam 27 comes into contact with the bottle 40, the electromagnetic clutch 24
The energization is cut off, the rotation of the gear 25 is no longer transmitted to the shaft 26, and the rotation of the cam 27 stops.At this point, the pressurization ends. The transmission of driving force in the self-variable drive device starts with the start of energization of the clutch 7, which causes the transmission of the driving force to the gear train 2.9.10.12+1! l.

14.18の低速モードから高速モードであるギヤ列2
,5,4,6,16.20による第1定着速度伝達に変
更されるOこれKより、定着処理tf第1定着速度で行
々われることになる0定着装置の操作終了時には、変速
駆動装置のモータの電源が切られ、プランジャー58と
クラッチ70通電が断たれる。このとき、変速駆動装置
のモータは慣性トルクによって若干の間回転力;持続す
るが、この回転力は第2定着速度に関与する側のギヤ列
を経て定着装置へ伝達される。一方、%1j御レバー5
0は引張りはね54の付勢力により時計方向に回動し、
ピン51は制御爪24Lから外れ、ばねクラッチは着状
態になるので、上記モータの慣性トルクによる回転カカ
;ギヤ25.軸26へ伝達し、カム27を回転させる0
力ム27カζ第2図に示すように円弧27bの中央がピ
ン40と対向する位置になると、制御環24上の制御爪
24bが制御レバー50上のビン51と係合する0する
とげねクラッチは脱状態と々るので、ギヤ25)[il
は軸26へ伝達せずカム27の回転は止まる。こうして
定着装置の作動開始前第2図の状態に戻る0 このように非常に大きζ・トルクを必要とする第1速度
よりも低速度の駆動伝達系を利用して加圧を行って、そ
の後第2速度よりも高速の第1速度に変更するようにし
たので、最大トルク値を小さくでき、電磁プランジャー
も小さいもので十分な効果を得ることができた。
14. Gear train 2 which is high speed mode from low speed mode of 18
, 5, 4, 6, 16.20 O From this, the fixing process tf will be carried out at the first fixing speed 0 At the end of the operation of the fixing device, the variable speed drive device The power to the motor is turned off, and the plunger 58 and clutch 70 are de-energized. At this time, the motor of the variable speed drive device maintains a rotational force for a while due to inertia torque, but this rotational force is transmitted to the fixing device via the gear train on the side involved in the second fixing speed. On the other hand, %1j control lever 5
0 rotates clockwise due to the urging force of the tension spring 54,
The pin 51 is disengaged from the control claw 24L and the spring clutch is engaged, so that the rotation force due to the inertial torque of the motor; the gear 25. 0 that is transmitted to the shaft 26 and rotates the cam 27
When the center of the arc 27b is at a position facing the pin 40 as shown in FIG. Since the clutch is disengaged, gear 25) [il
is not transmitted to the shaft 26, and the rotation of the cam 27 stops. In this way, the state returns to the state shown in Figure 2 before the fixing device starts operating. In this way, pressure is applied using a drive transmission system that is slower than the first speed, which requires a very large ζ torque, and then Since the first speed was changed to a higher speed than the second speed, the maximum torque value could be reduced, and a sufficient effect could be obtained with a small electromagnetic plunger.

ここで本実施例をさらに理解するため第6図の従来のタ
イミングチャートと本実施例のタイミングチャート第7
図を用いて説明する。これらの各図とも、上述の駆動モ
ータ、プランジャー及び電磁クラッチを用い、第1定着
速度時におけるシーケンスを、時刻tO;定着装置の作
動開始時刻1時刻t1;定着装置の作動終了時刻とし、
駆動モータ。
In order to further understand this embodiment, we will refer to the conventional timing chart shown in FIG. 6 and the timing chart 7 of this embodiment.
This will be explained using figures. In each of these figures, the above-described drive motor, plunger, and electromagnetic clutch are used, and the sequence at the first fixing speed is set as time tO: operation start time of the fixing device, time t1: operation end time of the fixing device,
drive motor.

プランジャー及び電磁クラッチの通電の断続形態はすぺ
で同じものを用いた0定着装置の作動途中、第2定着速
度へ切換るときは電磁クラッチのみオフされる0 第6図は、従来の所定速度のモードの時に加圧と所定速
度の回転とを同時に行うタイプのタイミングチャートで
ある0このような装置例では、定着装置用の変速駆動装
置の出力軸17に加わるトルクはローラの加圧途中で最
大になるOこの理由は以下による0 第4図に示すように、加圧途中でカム27の円弧27b
がビン40と接触しているとき、この瞬間における軸2
6に必要なトルクは、円弧27bの中心と接触点42を
結ぶ直線から軸26の中心までの距離Rとビン40への
作用力Fを乗じて得られるトルクと接触点42での摩擦
トルクを加え合わせたものである。一方、加圧が完了し
て第5図のよう罠なうたとき、円弧27&の中心と接触
点42’を結ぶ直線から軸26の中心までの距離は、円
弧27aが軸26の中心と一致することで零でin 電
番カムH回転した〜\ので摩擦トルクもない。したがっ
て、加圧完了後は変速駆動装置の出力軸はローラの回転
のための駆動トルクのみ伝達すれに良いが、加圧途中で
は前述の通りピン40への作用力によるトルクと接触点
42での鯖擦トルク及びローラの回転駆動トルクが必要
となる。
The plunger and the electromagnetic clutch are all energized in the same way.During the operation of the fixing device, only the electromagnetic clutch is turned off when switching to the second fixing speed. This is a timing chart of a type that simultaneously pressurizes and rotates at a predetermined speed when in the speed mode. In this example of a device, the torque applied to the output shaft 17 of the variable speed drive device for the fixing device is applied during the roller pressurization. The reason for this is as follows.0 As shown in Fig. 4, the arc 27b of the cam 27 is
is in contact with the bottle 40, the axis 2 at this moment
The torque required for 6 is calculated by multiplying the distance R from the straight line connecting the center of the arc 27b and the contact point 42 to the center of the shaft 26 by the force F acting on the bottle 40, and the friction torque at the contact point 42. It is an addition. On the other hand, when the pressurization is completed and the trap is turned as shown in FIG. As a result, the electric number cam H rotated at zero, so there was no friction torque. Therefore, after the pressurization is completed, the output shaft of the variable speed drive device is good enough to transmit only the driving torque for rotating the roller, but during the pressurization, the torque due to the force acting on the pin 40 and the torque at the contact point 42 are transmitted as described above. Scraping torque and roller rotation driving torque are required.

また、ローラの回転駆動トルクは常連回転時、す々わち
通常の動作時よりもローラの慣性力のため停止状態から
所定の回転速度を得るまでの方が大きいトルクが必要で
ある0 以上のように同一駆動系からローラの駆動と加圧機構の
駆動を得る場合には、定着装置が作動準備完了までが最
も大きい駆動トルクを必要とする。
In addition, the rotational driving torque of the roller needs to be larger during regular rotation, that is, to obtain a predetermined rotational speed from a stopped state than during normal operation due to the inertia of the roller. When driving the rollers and the pressure mechanism from the same drive system, the maximum driving torque is required until the fixing device is ready for operation.

しかし仁のとき、使用頻度の多い第1定着速度で行われ
ているので、必然的に′Ij&磁クラツクラッチて上記
の大きな駆動トルクを伝達しなければならない。したが
って電磁クラッチは大容且化し、消費電力は大きくなり
、形状も大型化する。また、価格もこれに見合って高く
なる。したがって小型で41景であって消費電力の小さ
く安価な変速駆動装置を供給できない。
However, since the fixing is carried out at the frequently used first fixing speed, it is necessary to transmit the above-mentioned large driving torque using the Ij & magnetic clutch. Therefore, the electromagnetic clutch becomes larger in size, consumes more power, and becomes larger in size. Also, the price will be correspondingly higher. Therefore, it is not possible to provide a small and inexpensive variable speed drive device with low power consumption.

第7図は本実施例の第1定着速度時罠おけるシーケンス
制御を示すタイムチャートである0変速駆動装置やロー
ラの着脱機構の機械的構成は従来例と同じであるO toは定着装置の作動開始時刻、tlは定着装置の作動
終了時刻、tzは電磁クラッチの通電開始時刻である0
時間(tz−6o)は、第2定着速度時にお〜・てカム
27が半回する時間よりやや長く設定している0 定着装置の作動開始時刻toにおいて、変速駆動装置の
モータが回転し始め、プランジャー58の通電がなされ
る。これによって、モータの駆動力はギヤ2.ギヤ9.
ギヤ10.ギヤ12.ギヤ13、ギヤ14.ギヤ18.
ワンウェイクラッチ19を介して出力軸17へ第2定着
速度に対応する回転速度で伝達する。そして噛合いクラ
ッチ20と21及び軸2′5.ギヤ22を介してギヤ2
5を駆動する。一方、プランジャー58は通電されアー
ム50は反時計方向への回動位置にあるので、始期のピ
ン51と制御爪24bとの保合が外れ、ばねクラッチは
着状態にある。したがって、ギヤ25の回転駆動力は軸
26へ伝達され、カム27を回転させる。カム27の円
弧27aがピン40と対向した時、ピン51と制御爪2
4aが係合し、制御環24を拘束するのでばねクラッチ
は脱状態になる。この結果、カム27の回転が止まり、
ローラの加圧が完了する。その直後、時刻7!2におい
て電磁クラッチ7を通電させて、第1定着速度に対応す
る回転速度の駆動を出力軸17へ伝達させて、ローラを
第1定着速度に対応する回転速度で駆動する。
FIG. 7 is a time chart showing the sequence control at the first fixing speed of this embodiment.The mechanical configuration of the 0-speed drive device and the roller attachment/detachment mechanism is the same as the conventional example.O to is the operation of the fixing device. 0 is the start time, tl is the operation end time of the fixing device, and tz is the start time of energization of the electromagnetic clutch.
The time (tz-6o) is set to be slightly longer than the time it takes for the cam 27 to turn half a turn at the second fixing speed.At the start time of the fixing device, the motor of the variable speed drive device starts rotating. , the plunger 58 is energized. As a result, the driving force of the motor is transferred to gear 2. Gear 9.
Gear 10. Gear 12. Gear 13, gear 14. Gear 18.
The rotational speed corresponding to the second fixing speed is transmitted to the output shaft 17 via the one-way clutch 19. and dog clutches 20 and 21 and shaft 2'5. Gear 2 via gear 22
Drive 5. On the other hand, since the plunger 58 is energized and the arm 50 is in the counterclockwise rotating position, the initial engagement between the pin 51 and the control pawl 24b is released, and the spring clutch is in the engaged state. Therefore, the rotational driving force of the gear 25 is transmitted to the shaft 26, causing the cam 27 to rotate. When the arc 27a of the cam 27 faces the pin 40, the pin 51 and the control claw 2
4a engages and restrains the control ring 24, so that the spring clutch is disengaged. As a result, the rotation of the cam 27 is stopped,
Pressure of the roller is completed. Immediately thereafter, at time 7!2, the electromagnetic clutch 7 is energized to transmit the drive at the rotational speed corresponding to the first fixing speed to the output shaft 17, thereby driving the roller at the rotational speed corresponding to the first fixing speed. .

定着装置の作動終了時は従来例と同じである。第2定着
速度へ切換えるには、ローラの加圧完了後に電磁クラッ
チをオフすれば良い。
The time when the operation of the fixing device ends is the same as in the conventional example. To switch to the second fixing speed, the electromagnetic clutch may be turned off after the roller is pressurized.

もちろん、第2定着速度で定着する場合(例えば樹脂シ
ートや厚手の紙等の記録材にカラートナー像を定着する
場合)には、上記ロー228.29の加圧と第2速度で
の回転を同時に行なうようにする。このときのトルクは
従来の最大l・ルクよりも小さくすることができるのは
いうまでもない0以上説明した実施例によれば、定着装
置のローラの加圧動作中は遅い方の第2定着速度時の回
転駆動力で行なっている。摩擦力のみによって駆動力を
伝達するIt電磁クラッチ比べ、機械的結合による駆動
の伝達は十分な伝達トルクを有するのでローラの加圧動
作中の大きな駆動トルクに対しても十分な伝達トルクと
高い信頼性を得ることができる。そして、この動作中は
電磁クラッチを介さないので電磁クラッチのロータとア
ーマチュア間のすべりによる動作不良もない。また、前
記動作不良がないような配慮をすることは、電磁クラッ
チを大容易化し、大消費電力化して装置を大型化し、さ
らに高価な装置になることになるが、本発明を実施する
ことによって電磁クラッチ等の部材を有する変速機構を
小容易化し消費電力を小さく形状も小型にすることがで
き、さらに安価な装置を提供することができる。本発明
は画像形成装置に用いられる加圧と駆動を行なうものす
べてに適用できるが、特に定着装置に有効である他、他
の加圧、駆動を行なう一般の装置に適用できるものであ
る。
Of course, when fixing at the second fixing speed (for example, when fixing a color toner image on a recording material such as a resin sheet or thick paper), pressurization of the rows 228 and 29 and rotation at the second speed are necessary. Try to do them at the same time. It is needless to say that the torque at this time can be made smaller than the conventional maximum l·lux.According to the embodiment described above, during the pressurizing operation of the roller of the fixing device, the slower second fixing This is done using rotational driving force at speed. Compared to an electromagnetic clutch that transmits driving force only by frictional force, the transmission of drive by mechanical coupling has sufficient transmission torque, so it has sufficient transmission torque and high reliability even against the large driving torque during roller pressing operation. You can get sex. Since the electromagnetic clutch is not used during this operation, there is no malfunction due to slippage between the rotor and armature of the electromagnetic clutch. Further, taking care to prevent malfunctions would make the electromagnetic clutch much simpler, consume more power, make the device larger, and make it more expensive, but by implementing the present invention, A speed change mechanism having members such as an electromagnetic clutch can be made smaller, consume less power, and have a smaller size, and an even cheaper device can be provided. The present invention can be applied to all devices that perform pressure and drive used in image forming apparatuses, but is particularly effective in fixing devices, and can also be applied to other general devices that perform pressure and drive.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例の一つである定着装置用の変速
駆動装置の説明図、 第2図は第1図の定着装置の脱時の着脱機構の関係を示
す図、 第3図は第1図の定着装置の着時の着脱機構の関係を示
す図、 第4図は第1図の定着装置の加圧途中におけるカムの位
置を示す図、 第5図は第1図の定着装置の加圧完了時におけるカムの
位置を示す図、 2g6図は従来の#j保影形成装置局速シーケンス制御
のタイムチャートを示す図1、 第7図は第1図実施例における高速シーケンス制御のタ
イムチャートを示す図である。 1は入力軸、7は電磁クラッチ、19はワンウェイクラ
ッチ、20と21は噛合いクラッチ、24はN31J御
環、27はカム、58はプランジャー、38社回動腕、
66は引張板、33社ローラ支持板、28はローラ、2
9はローラ0 39 38 37 t’tb V^(II」
FIG. 1 is an explanatory diagram of a variable speed drive device for a fixing device which is one of the embodiments of the present invention, FIG. 2 is a diagram showing the relationship of the attachment and detachment mechanism when the fixing device of FIG. 1 is removed, and FIG. 3 is a diagram showing the relationship of the attachment/detachment mechanism when the fixing device shown in FIG. 1 is installed, FIG. 4 is a diagram showing the position of the cam during pressurization of the fixing device shown in FIG. Figure 2g6 is a diagram showing the position of the cam when pressurization of the device is completed; Figure 2g6 is Figure 1 which shows a time chart of local speed sequence control of the conventional #j image retention device; Figure 7 is high-speed sequence control in the embodiment of Figure 1. FIG. 2 is a diagram showing a time chart of FIG. 1 is an input shaft, 7 is an electromagnetic clutch, 19 is a one-way clutch, 20 and 21 are dog clutches, 24 is an N31J ring, 27 is a cam, 58 is a plunger, 38 is a rotating arm,
66 is a tension plate, 33 roller support plate, 28 is a roller, 2
9 is roller 0 39 38 37 t'tb V^(II)

Claims (2)

【特許請求の範囲】[Claims] (1)回転駆動力を利用して回転体と回転体に当接する
部材を加圧接触させる加圧機構と、この回転駆動力を伝
達する駆動力伝達手段と、を有し駆動力伝達手段によっ
て上記回転体の回転と上記加圧とを■■■行々う加圧駆
動装置において、上記駆動力伝達手段は上記回転体を所
定速度で回転させるための着脱可能な駆動伝達用の保合
手段を備える第1駆動伝達手段と、上記回転体をこの所
定速度とは異なる速度で回転させるための一方向性伝達
部材を備える第2駆動手段と、上記回転体を上記所定速
度に回転する際に第2駆動手段により上記回転体を回転
させ且つ上記加圧接触を行った後第1駆動手段により上
記回転体を所定速度に回転させる変速駆動機構と、を有
していることを特徴とする加圧駆動装置。
(1) A pressurizing mechanism that presses and contacts a rotating body and a member that contacts the rotating body using rotational driving force, and a driving force transmission means that transmits this rotational driving force, and the driving force transmission means In the pressurizing drive device that rotates the rotary body and pressurizes the rotary body, the drive force transmission means is a detachable drive transmission retaining means for rotating the rotary body at a predetermined speed. a second drive means including a unidirectional transmission member for rotating the rotating body at a speed different from the predetermined speed; A variable speed drive mechanism that rotates the rotary body by a second drive means and rotates the rotor at a predetermined speed by the first drive means after the pressurized contact is made. Pressure drive device.
(2)上記回転体に当接する部材と、上記回転体は共に
定着用ローラであり、上記加圧駆動装置は定着装置用の
ものである特許請求の範囲第1項記載の加圧駆動装置。
(2) The pressure drive device according to claim 1, wherein the member that contacts the rotary body and the rotary body are both fixing rollers, and the pressure drive device is for a fixing device.
JP19575983A 1983-10-18 1983-10-18 Pressure driving device Pending JPS6086575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19575983A JPS6086575A (en) 1983-10-18 1983-10-18 Pressure driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19575983A JPS6086575A (en) 1983-10-18 1983-10-18 Pressure driving device

Publications (1)

Publication Number Publication Date
JPS6086575A true JPS6086575A (en) 1985-05-16

Family

ID=16346481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19575983A Pending JPS6086575A (en) 1983-10-18 1983-10-18 Pressure driving device

Country Status (1)

Country Link
JP (1) JPS6086575A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318631A (en) * 1990-12-18 1994-06-07 Sharp Kabushiki Kaisha Pressure control device for a pressure roller
JP2011257737A (en) * 2010-05-11 2011-12-22 Ricoh Co Ltd Drive unit for image forming apparatus and image forming apparatus using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318631A (en) * 1990-12-18 1994-06-07 Sharp Kabushiki Kaisha Pressure control device for a pressure roller
JP2011257737A (en) * 2010-05-11 2011-12-22 Ricoh Co Ltd Drive unit for image forming apparatus and image forming apparatus using the same

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