JPS5964862A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5964862A JPS5964862A JP57174886A JP17488682A JPS5964862A JP S5964862 A JPS5964862 A JP S5964862A JP 57174886 A JP57174886 A JP 57174886A JP 17488682 A JP17488682 A JP 17488682A JP S5964862 A JPS5964862 A JP S5964862A
- Authority
- JP
- Japan
- Prior art keywords
- developing device
- developing
- photosensitive drum
- toner
- guide
- 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.)
- Granted
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0896—Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、感光ドラムに静電潜像を形成し、それをトナ
ーで現像し、その現像像を転写材に転写して定着器を経
てコピー紙を排出し、感光ドラムはクリーニングして残
留トナーを落して再び潜像形成工程に至るサイクルを繰
返えす型式の電子複写機に於て、特に複写機本体及び感
光ドラムと、現像器との関連部の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention forms an electrostatic latent image on a photosensitive drum, develops it with toner, transfers the developed image to a transfer material, and discharges the copy paper through a fixing device. In an electronic copying machine of the type in which the drum is cleaned to remove residual toner and the cycle of forming a latent image is repeated again, the present invention particularly relates to improvements in the copying machine main body, the photosensitive drum, and the parts related to the developing device.
以下図面の実施例について説明する。第１図に於て１は
周面に光導電体層を形成した感光ドラムで、その周方に
潜像形成・現像・転写・クリーニング等のプロセス工程
部が配置されるものであるが、それ等は従来周知のもの
が適宜適用されるので、本発明に関係のある現像器２の
みを表わす。The embodiments shown in the drawings will be described below. In Figure 1, 1 is a photosensitive drum with a photoconductor layer formed on its circumferential surface, around which process steps such as latent image formation, development, transfer, and cleaning are arranged. Since conventionally known ones are applied as appropriate, only the developing device 2 related to the present invention is shown.
現像器２は第３図のように感光ドラム１に対面する現像
スリーブ３のある現像部り、ホッパ部Ｈ・補給トナーカ
ートリッジ部Ｃから成る。現像器２は内部に微細な現像
剤（トナー）を有し、周囲が汚れ易く清掃のため、その
他保守点検のために複写機本体から容易に着脱できるこ
とが必要である。As shown in FIG. 3, the developing device 2 consists of a developing section with a developing sleeve 3 facing the photosensitive drum 1, a hopper section H, and a replenishment toner cartridge section C. The developing device 2 has a fine developer (toner) inside, and the surrounding area is easily dirty, so it needs to be easily attachable and detachable from the copying machine main body for cleaning and other maintenance inspections.
その着脱に当り、感光ドラムｌから現像器２を離す必要
かあるので、従来現像器を感光ドラムの放射方向に移動
させるものが知られているが、隣接他機器との関係上大
型化し、各機器の構成・配置にも制約を受ける。Since it is necessary to separate the developing device 2 from the photosensitive drum 1 when attaching and removing it, a conventional method is known in which the developing device is moved in the radial direction of the photosensitive drum. There are also restrictions on the configuration and placement of equipment.
そこで現像器を感光ドラムの軸線と平行に出し入れする
ものもあるが、感光ドラム近傍に沿って出入する関係上
傷付は易く、位置決めが不正確になり易い。位置決めの
不正確により、現像機能の低下、他の隣接機器との接触
・破損も生じ易い等の問題点が多い。Therefore, there are some devices in which the developing device is moved in and out parallel to the axis of the photosensitive drum, but since the developing device is moved in and out along the vicinity of the photosensitive drum, it is easily damaged and the positioning is likely to be inaccurate. Inaccuracy in positioning causes many problems, such as deterioration of the developing function and the possibility of contact with and damage to other adjacent equipment.
本発明は上記後者の形式に於てその問題点を解消した現
像器着脱装置を提供することを目的とする。It is an object of the present invention to provide a developing device attachment/detachment device which solves the problem of the latter type.
第１図は現像器２を定位置にセットした状態を示す正面
図で４は複写機本体内の現像蓋受は枠板の手前側枠板４
ａに設けた現像器２の出入穴である。第２図は操作レバ
ー５を第１図から第２図の位置に回すことによって、現
像器２を穴４から出し入れ可能の位置に変位させた状態
を表わす。Fig. 1 is a front view showing the developing device 2 set in the normal position, and 4 is the developing lid holder inside the copying machine main body.
This is the entrance/exit hole for the developing device 2 provided at a. FIG. 2 shows a state in which the developing device 2 is moved to a position where it can be taken in and out of the hole 4 by turning the operating lever 5 from the position shown in FIG. 1 to the position shown in FIG.
以下その構成を詳述する。７争８は現像器２の手前側と
奥側の側板（第４図）、６は現像器２の前側（感光ドラ
ム側）の上部に於て側板７・８間に前方に突出させて設
けた上案内レール、９はその案内レール６を乗せる案内
レール兼現像器傾動軸で左右の本体内の枠板４ａ・４ａ
間に設けられる。The configuration will be explained in detail below. 7 and 8 are side plates on the front and back sides of the developing device 2 (Fig. 4), and 6 is provided at the upper part of the front side (photosensitive drum side) of the developing device 2, protruding forward between the side plates 7 and 8. The upper guide rail 9 is a guide rail and developer tilting shaft on which the guide rail 6 is placed, and frame plates 4a and 4a in the left and right main body.
provided in between.
１０は現像器２の後側（感光ドラム１と反対側）に於て
側板７・８間に取付けた下案内、１１は手前側枠板４ａ
に取付けた上記下案内１０の載置台兼案内で、第５図に
示すように現像器２の出入方向に対して狭い幅である。10 is a lower guide installed between the side plates 7 and 8 on the rear side of the developing unit 2 (opposite side to the photosensitive drum 1), and 11 is a front frame plate 4a.
The lower guide 10 is attached to the lower guide 10, and has a narrow width with respect to the direction in which the developing device 2 enters and exits, as shown in FIG.
１２は前記操作レバー５の軸で、図の場合はチャンネル
形に形成され左右の角軸受１３を介して枠板４ａφ４ａ
に回動自由に取付けられる。Reference numeral 12 designates the shaft of the operating lever 5, which in the case of the figure is formed into a channel shape and is connected to the frame plate 4aφ4a via left and right square bearings 13.
It can be mounted freely to rotate.
上記の操作レバー５を第２図の位置に置き、現像器２の
奥側を穴４に当てがい、上の案内レール６を傾動軸９に
、下の案内１０と載置台兼案内１１に乗せて押し込むと
、現像器２は容易に本体内に入る。現像器２が所定の位
置に達すると、下部案内１０は載置台１１から外れるが
、操作レバー５の軸１２に設けた支え部材１４が下部案
内１０の端部１０ａを下から受けて、現像器２を第２図
の挿入姿勢に保つ。Place the above-mentioned operating lever 5 in the position shown in FIG. 2, place the rear side of the developing device 2 against the hole 4, and place the upper guide rail 6 on the tilting shaft 9, the lower guide 10, and the mounting table/guide 11. When pushed in, the developing device 2 easily enters the main body. When the developing device 2 reaches a predetermined position, the lower guide 10 is removed from the mounting table 11, but the support member 14 provided on the shaft 12 of the operating lever 5 receives the end 10a of the lower guide 10 from below, and the developing device is removed. 2 in the insertion position shown in Figure 2.
次で操作レバー５を反時計方向に回すと、支え部材１４
が回るので、これに下案内１０が乗ったまま現像器２は
上部の傾動軸９を中心に時計方向に傾動し、現像スリー
ブ３の軸１９上の両端のコロ（保隔子）２０が感光ドラ
ム１に当接し、現像スリーブ３Φ感光ドラム１間の間隔
を一定に保持した第１図の現像位置に移動する。Next, when the operating lever 5 is turned counterclockwise, the support member 14
rotates, the developing device 2 is tilted clockwise around the upper tilting shaft 9 while the lower guide 10 is placed on it, and the rollers (insulators) 20 at both ends of the shaft 19 of the developing sleeve 3 are exposed to light. The developing sleeve 3Φ is brought into contact with the drum 1 and moved to the developing position shown in FIG. 1, where the distance between the photosensitive drums 1 is kept constant.
操作レバー５は引続き第１図の位置まで回動する。その
間軸１２に設けた押板２４が後述のように押子２１を介
して現像器２を感光ドラム１の方に押す。従って現像器
の前記自重傾動を、上記押板２４による強制傾動に構成
することもできる。The operating lever 5 continues to be rotated to the position shown in FIG. In the meantime, a push plate 24 provided on the shaft 12 pushes the developing device 2 toward the photosensitive drum 1 via a pusher 21, as will be described later. Therefore, the self-weight tilting of the developing unit can be configured to be a forced tilting by the push plate 24.
操作レバー５を第１・２図の各所定位置に正しく停止さ
せるため、ピン１５により角軸１２に起倒自由に取付け
、ストッパ１６を枠板４ａの孔１７又１８にに係脱させ
る。但しこのストッパ機構は他の適当な構成でよい。In order to correctly stop the operating lever 5 at each of the predetermined positions shown in FIGS. 1 and 2, it is attached to the square shaft 12 with a pin 15 so as to be freely raised and lowered, and the stopper 16 is engaged with and disengaged from the hole 17 or 18 of the frame plate 4a. However, this stopper mechanism may have any other suitable configuration.
現像器２は第１図の現像位置にセットされると、その手
前側側板７の複数の角の部分７ａ〜７ｄが出入穴４の縁
と重なり合って抜り止めとなる。なおこの抜は止めは軸
１２上の支え部材１４の上部１４ａが現像器の手前側側
板７に係合するようにしてもよい。When the developing device 2 is set at the developing position shown in FIG. 1, the plurality of corner portions 7a to 7d of the front side plate 7 overlap with the edges of the entrance/exit hole 4 to prevent it from coming out. The removal may be prevented by engaging the upper portion 14a of the support member 14 on the shaft 12 with the front side plate 7 of the developing device.
前記の支え部材１４は奥側だけでもよい。そうすると現
像器差し込みの際手前側皮え部材１４を避けるという注
意が省かれる。下案内１０の両端の曲げ部１０ｂは載置
台１１の突部１１ａに対する逃げである。The support member 14 may be provided only on the back side. This eliminates the need to avoid the front cover member 14 when inserting the developing device. The bent portions 10b at both ends of the lower guide 10 are reliefs for the projections 11a of the mounting table 11.
前記にした押子２１は下部案内１０の両端部に第３図の
ように収容筒２１ａ・ばね受２１ｂにより取付けられる
。前記のように現像器２を第１図の現像位置にセットし
たとき、押板２４が押子２１をばね２２に抗して押すと
、そのばね２２の反力は現像器２を前側即ち感光ドラム
１の方に押すことになる。The pusher 21 described above is attached to both ends of the lower guide 10 by a housing tube 21a and a spring receiver 21b as shown in FIG. When the developing device 2 is set at the developing position shown in FIG. 1 as described above, when the pusher plate 24 pushes the pusher 21 against the spring 22, the reaction force of the spring 22 pushes the developing device 2 toward the front, that is, toward the photosensitive surface. It will be pushed towards drum 1.
従って前記の間隔保持用コロ２０と感光ドラム１に、若
干の偏心や微細な凹凸があっても、現像器２は回動軸９
を中心に感光ドラム側にばね２２で常に押されドラム１
と現像スリーブ３の間隔を一定に保つことができる。Therefore, even if there is slight eccentricity or minute irregularities between the spacing rollers 20 and the photosensitive drum 1, the developing device 2 is
The drum 1 is constantly pushed by a spring 22 toward the photosensitive drum side with
The distance between the developing sleeve 3 and the developing sleeve 3 can be kept constant.
しかし現像器２の手前側と奥側との重心位置に対する不
均衡、手前・奥の押子２１の押圧力の不均等によって、
第７図でコロ２０・２０の感光ドラム１に対する抑圧度
に誤差を生ずるおそれがある。However, due to the imbalance in the center of gravity between the front side and the back side of the developing device 2, and the uneven pressing force of the pushers 21 on the front and back sides,
In FIG. 7, there is a possibility that an error may occur in the degree of suppression of the photosensitive drum 1 by the rollers 20.
そこで前記の現像器２の出入案内兼傾動軸９とこれに現
像器を懸架し且出入案内となるレール６とを、その懸架
軸線Ｘ９−Ｘ９に対して現像器２の水平振れを許容する
構造とする。Therefore, the above-mentioned loading/unloading guide/tilting shaft 9 of the developing device 2 and the rail 6 on which the developing device is suspended and serving as the loading/unloading guide are constructed to allow horizontal vibration of the developing device 2 with respect to the suspension axis X9-X9. shall be.
第７・８図はレール６を傾動軸９を跨ぐ橋形とし、中央
部に於て上面の突子２５・左右の突子２６−２６を介し
て両者６・９を当接させ、両端を」二面の突子２７で当
接させて、現像器の水平振れを許容する。In Figures 7 and 8, the rail 6 is in the form of a bridge that straddles the tilting shaft 9, and the two 6 and 9 are brought into contact with each other at the center via the protrusion 25 on the top surface and the protrusions 26-26 on the left and right sides, and both ends are connected. '' The protrusions 27 on two sides are brought into contact with each other to allow horizontal vibration of the developing device.
第９図は槍形レール６を中央６ａで狭めて軸９に当接さ
せて拘束し、両端を自由にして水平振れを許容した例で
ある。なおレール６・軸９は図示と反対に軸９を現像器
２の側板７・８に取付けてもよい。FIG. 9 shows an example in which the spear-shaped rail 6 is narrowed at the center 6a and restrained by coming into contact with the shaft 9, and both ends are left free to allow horizontal vibration. Note that the rail 6 and the shaft 9 may be attached to the side plates 7 and 8 of the developing device 2, contrary to what is shown in the drawings.
本発明は、前記のように、現像器２を感光ドラム軸と平
行な案内に沿って複写機本体に抜き差しするものに於て
、その抜き差し時には現像器を感光ドラムから離し、所
定の奥端まで差し込まれれと現像器は感光ドラム側に傾
動し、その現像スリーブ３と感光ドラム１との間隔を所
定に保つ構成であるから、現像器２の着脱機構が大型化
することがなく簡単に構成され、しかも抜き差し時には
感光ドラムとの十分な間隔を保ち、当接により傷付ける
おそれがなく操作を容易にする効果がある。As described above, in the case where the developing device 2 is inserted into and removed from the copying machine main body along a guide parallel to the photosensitive drum axis, the developing device is separated from the photosensitive drum at the time of insertion and removal, and the developing device is moved to a predetermined rear end. When inserted, the developing unit tilts toward the photosensitive drum and maintains a predetermined distance between the developing sleeve 3 and the photosensitive drum 1. Therefore, the mechanism for attaching and detaching the developing unit 2 does not become bulky and is easily constructed. Furthermore, when inserting and removing the photosensitive drum, a sufficient distance from the photosensitive drum is maintained, and there is no risk of damage due to contact, making the operation easier.
図示例の粉末トナー補給φ撹拌機構は下記の通りである
。従来センサーでトナーの消費状態を検出し、その信号
で補給するに当り、現像作用の停止中に行うと、センサ
の検出が不正確となり、大量の粉末トナーが補給される
ことがある。特に雰囲気湿度が多いときは固まり易く、
その塊状のトナーが補給され、センサの上方に空洞にブ
リッジして十分補給されて（゛るのにセンサはトナー無
しの信号を出し補給されることがある。The illustrated powder toner supply φ stirring mechanism is as follows. Conventionally, when a sensor detects the state of toner consumption and replenishes toner based on the signal, if this is done while the developing action is stopped, the sensor detection may be inaccurate and a large amount of powdered toner may be replenished. It hardens easily, especially when the atmospheric humidity is high.
The block of toner is replenished and bridges the cavity above the sensor, and even though the toner is sufficiently replenished, the sensor may issue a toner-out signal and be replenished.
そこで現像動作をさせて補給すると、その動作によって
始めてトナーなしの信号を検出して補給を開始するため
時間的にロスがある。Therefore, if a developing operation is performed and toner is replenished, a toner-out signal is detected for the first time in this operation and replenishment is started, resulting in a time loss.
図示例はこの問題点を解消したものである。The illustrated example solves this problem.
第３図のように現像器２の内部は現像部りとホッパ部Ｈ
と補給トナーカートリッジ部Ｃとが順次に連通している
。図示例は１成分トナーによる現像器を示す。ステンレ
ス等の非磁性スリーブ３の中に固定板３ｂ（第１図）で
回転しないように止められた磁石ローラ３ａがある。３
０は現像器箱２ａに固定された磁性体ブレードで現像ス
リーブ３との間隙を約２４０−とする。磁性ブレード３
０に固定磁石３ｂの磁極Ｎ１に対応してＳ極を誘起し、
そのブレード３０の下面を通過したスリーブ３の表面に
は約８０ルのトナー薄層が形成され、約２５０川の間隙
で対面する感光ドラム１の表面の静電潜像に転移して顕
像化する。即ちジャンピング現像することは既知のもの
と同様である。上記スリーブ表面の８０１１．圧のトナ
ーは略完全に転移するのでトナーは可成り消耗される。As shown in Figure 3, the inside of the developing device 2 consists of a developing section and a hopper section H.
and the replenishment toner cartridge section C are sequentially communicated with each other. The illustrated example shows a developing device using one-component toner. In a non-magnetic sleeve 3 made of stainless steel or the like, there is a magnet roller 3a which is stopped from rotating by a fixed plate 3b (FIG. 1). 3
0 is a magnetic blade fixed to the developer box 2a, and the gap with the developer sleeve 3 is about 240-. magnetic blade 3
0 to induce an S pole corresponding to the magnetic pole N1 of the fixed magnet 3b,
A thin layer of toner of about 80 ml is formed on the surface of the sleeve 3 that has passed the lower surface of the blade 30, and is transferred to the electrostatic latent image on the surface of the photosensitive drum 1, which faces the photosensitive drum 1 with a gap of about 250 ml, and is visualized. do. That is, jumping development is similar to known methods. 8011 on the surface of the sleeve. Since the toner under pressure is almost completely transferred, the toner is considerably consumed.
現像部りの底面に検出器Ｓを設置し、トナー量が設定値
に減少すると信号を発し、現像器２の手前側側板７に増
付けられた第１・４図に示すモータんを回転させる。そ
の出力軸上の歯車Ｇ１から、歯車Ｇ２を介し両側板７・
８間に渡した補給用磁石ローラ３２を第３図で左回転さ
せる。A detector S is installed on the bottom of the developing unit, and when the amount of toner decreases to a set value, it emits a signal and rotates the motor shown in Figures 1 and 4, which is added to the side plate 7 on the front side of the developing unit 2. . From gear G1 on the output shaft, through gear G2, both side plates 7 and
The replenishment magnet roller 32 passed between 8 and 8 is rotated counterclockwise as shown in FIG.
その補給用磁気ローラ３２は現像部りとホッパ部Ｈとの
連通口内に横架され、ホッパ部前板３３との間隙ｄ ３
’、 ２．５ｍｍからホッパ部Ｈのトナーを現像部り
に補給する。この場合間隙ｄ３を通過する磁化されてブ
ラシになった長い毛先のトナーで現像部りに落下するが
、落ちないで残ったブラシはホッパ部底板３４との間隙
ｄ４（＼ Ｑ、５＋ｎ＋ｎ）で掻き落される。なおこの
補給用ローラ３２は、周面軸線方向に多数の溝を形成し
たローラ、又は開閉シャツタ板に換えることもある。The replenishing magnetic roller 32 is suspended horizontally within the communication port between the developing section and the hopper section H, and has a gap d 3 between it and the hopper section front plate 33.
', Replenish the toner in the hopper section H from 2.5 mm to the developing section. In this case, the toner with long bristles that are magnetized and become brushes passing through the gap d3 falls into the developing section, but the brushes that do not fall and remain are in the gap d4 (\Q, 5+n+n) with the hopper bottom plate 34. scraped off. Note that this replenishing roller 32 may be replaced with a roller having a large number of grooves formed in the axial direction of its circumferential surface or an open/close shirt plate.
現像器２の奥側で補給用磁気ローラ３２の軸３２ａ上に
第４・１０図の歯車Ｇ４を取付け、歯車Ｇ５を介しホッ
パ部Ｈに設けた撹拌器３５を回転させて、ホッパ部Ｈ内
のトナーをもみ解すと同時に補給用磁気ローラ３２の方
にトナーを搬送させる。ホッパ部内のトナーは、上記撹
拌器３５による掻き寄せとローラ３２の磁気吸引とによ
り略全量が補給される。The gear G4 shown in FIGS. 4 and 10 is mounted on the shaft 32a of the replenishing magnetic roller 32 on the back side of the developing device 2, and the agitator 35 provided in the hopper section H is rotated via the gear G5. At the same time, the toner is massaged and conveyed to the replenishing magnetic roller 32. Almost all of the toner in the hopper section is replenished by scraping by the agitator 35 and magnetic attraction by the roller 32.
３６は軸３６ａ・３６ｂにより両側板７拳８間に横架さ
れた現像部り内の撹拌棒で、補給用磁気ローラ３２の軸
上の歯車Ｇ２から同Ｇ３を介して駆動される。現像部り
内のトナーの架橋防止と現像スリーブ３の方へのトナー
の掻き送り作用の他に、センサＳの上面にトナーが滞留
しないように掻き取り作用を行う。３７は撹拌棒３６に
取付けたセンサ拭拭用コイルばねである。Reference numeral 36 denotes a stirring rod in the developing section which is horizontally suspended between the side plates 7 and 8 by shafts 36a and 36b, and is driven by gears G2 and G3 on the shaft of the replenishing magnetic roller 32. In addition to preventing cross-linking of the toner in the developing section and scraping the toner toward the developing sleeve 3, a scraping action is performed to prevent toner from remaining on the upper surface of the sensor S. 37 is a sensor wiping coil spring attached to the stirring bar 36.
トナーが補給され、上記の払拭作用があっても周囲から
直ぐセンサＳの上に補充されるようになり即ち補給量が
設定量以上になるとモータＭへ停止信号を発する。なお
センサＳは重量によるもの、圧電素子により振動モード
の変化を検出するもの、磁性トナーに於てはその透磁率
によるもの等が適宜利用される。Toner is replenished, and even with the above-mentioned wiping action, the toner is immediately replenished onto the sensor S from the surroundings, that is, when the replenishment amount exceeds a set amount, a stop signal is issued to the motor M. The sensor S may be one based on weight, one that detects changes in vibration mode using a piezoelectric element, or one based on magnetic permeability in the case of magnetic toner.
上記のトナー補給・撹拌作用はモータＭの回転補給中、
現像スリーブ３の回転とは無関係に、センサＳの検出信
号によって行われる。しかし現像部りの撹拌作用は、補
給中と、トナーが無くなりかけたときと必要である。The above-mentioned toner replenishment/agitation action is performed while the motor M is rotating and replenishing the toner.
This is performed based on the detection signal of the sensor S, regardless of the rotation of the developing sleeve 3. However, the stirring action in the developing section is necessary during replenishment and when the toner is about to run out.
補給中には補給トナーの偏在でセンサＳ上へ少量のトナ
ーしかないときは過補給、逆の場合は補給不足を生じ、
トナーはその物性上架橋し易く、固まり易いので上記現
像を免かれない。During replenishment, if there is only a small amount of toner on the sensor S due to uneven distribution of replenishment toner, over-replenishment will occur, and in the opposite case, insufficient replenishment will occur.
Due to its physical properties, toner easily crosslinks and hardens, so it cannot be avoided by the above-mentioned development.
現像部りのトナーが無くなりかけたときは、センサ表面
、その回りにトナーが溜り易く、補給信号を発しないこ
とがある。そのため成膜定量に減少したことを検出する
別の検出手段を設け、或はコピ一枚数、クリーニングで
捕集したトナー量、画像書き込み型複写機では書き込み
信号の量を積算し、大略のトナー消費量を検出して、現
像部内の撹拌φセンサの払拭をすることが考えられるが
、いずれも実用性がない。When the toner in the developing section is about to run out, toner tends to accumulate on and around the sensor surface, and a replenishment signal may not be issued. Therefore, another detection means is provided to detect a decrease in the film deposition quantity, or the number of copies, the amount of toner collected during cleaning, and the amount of writing signals in image writing type copiers are integrated to determine the approximate toner consumption. It is conceivable to detect the amount and wipe the agitation φ sensor in the developing section, but neither is practical.
そこで現像スリーブと連動して同期回転させる撹拌棒を
用いるものもあるが、撹拌は緩速且断続的が好ましく、
スリーブ駆動歯車Ｇ６との間に多段減速機又はラチェッ
ト送り機構並びに間欠駆動機構等を必要とするので、複
雑大型化し、掻音を発する等これも実用的でない。Therefore, some devices use a stirring rod that rotates synchronously with the developing sleeve, but stirring is preferably slow and intermittent;
Since a multi-stage reduction gear, a ratchet feeding mechanism, an intermittent drive mechanism, etc. are required between the sleeve drive gear G6, this is also impractical as it becomes complicated and large and generates scratching noise.
そこで上記の現像スリーブ連動撹拌装置を改良したもの
で、第４・１０図に示すように現像部撹拌棒３６の奥側
の軸３６ｂにワンウェイクラッチ３８を介してレバー３
９を取付け、その自由端側を現像スリーブ駆動歯車Ｇ６
と一体的な遍心カム４０にばね４１で押しつける。Therefore, this is an improved version of the above-mentioned developing sleeve interlocking stirring device, and as shown in FIGS.
9, and connect its free end to the developing sleeve drive gear G6.
It is pressed by a spring 41 to an eccentric cam 40 that is integral with the cam.
上記のように構成すると、現像スリーブ３の回転中即ち
現像作用中で、現像剤の補給が行われずモータＭが撹拌
棒３６を駆動しないときでも、現像スリーブ３の１回転
に１回宛レバー３９がカム４０により第１０図に於て押
し上げられ、その押し上げ動のときワンウェイクラッチ
３８が軸３６ｂ撹拌棒３６を回動させ、即ち撹拌棒３６
を間欠・ 回動させて、トナーの撹拌及びセンサＳの払
拭作用を行う。With the above configuration, even when the developing sleeve 3 is rotating, that is, during the developing operation, and the developer is not being replenished and the motor M does not drive the stirring rod 36, the lever 39 is moved once per rotation of the developing sleeve 3. is pushed up by the cam 40 as shown in FIG.
is rotated intermittently to stir the toner and wipe the sensor S.
現像作用中現像剤の補給動作が行われ、モータＭと上記
現像スリーブ側からの撹拌棒駆動とが二重になっても、
回転の早い方によってその駆動が行われるので少しも不
都合はない。Even if the developer is replenished during the development operation and the motor M and the stirring rod drive from the development sleeve side are doubled,
Since the drive is performed by the faster rotating one, there is no inconvenience at all.
上記の極めて簡単なそして掻音を出すことのない構成で
、現像中でも緩速且断続に現像部のトナーの撹拌、セン
サの払拭が行われ、現像むらのない現像と、補給検出セ
ンサの高精度を保つことができる。With the above-mentioned extremely simple configuration that does not produce scratching noise, the toner in the developing section is slowly and intermittently stirred and the sensor is wiped during development, resulting in even development and high accuracy of the replenishment detection sensor. can be kept.
次に同じ目的達成のための別の手段を例示する。第１１
図はトナー補給用モータＭの回路図でＤＣその低回逆転
性のモータを用いる。現像中でトナー補給をしない場合
はリレー接点の常閉接点ＮＣが閉じ、電源Ｅ１から断続
タイマＴを経て断続的にモータＭに通電され、モータＭ
は歯車０１〜Ｇ３を介し、補給磁気ローラ３２、撹拌棒
３５・３６を現像剤補給時とは逆方向に駆動する。なお
電源Ｅ１によるモータ回転を極く低速としてタイマＴを
省くこともできる。Next, another means for achieving the same purpose will be exemplified. 11th
The figure shows a circuit diagram of a toner replenishment motor M, which uses a DC motor with low rotation speed. If toner is not replenished during development, the normally closed contact NC of the relay contact is closed, and the motor M is intermittently energized from the power source E1 via the intermittent timer T.
drives the replenishing magnetic roller 32 and stirring rods 35 and 36 in the opposite direction to the direction when replenishing the developer via the gears 01 to G3. Note that the timer T can also be omitted by setting the motor rotation by the power source E1 to an extremely low speed.
この場合磁気ローラ３２は狭い間隙ｄ４から広い間隙ｄ
３の方に回転するからトナーの補給は行われない。又撹
拌ｓ３５・３６はトナーを磁気ローラ３２・スリーブ３
から遠ざける方向に回転するが、微速度且間欠的である
から実際上は支障なく、トナーを解す作用は十分行うこ
とができる。In this case, the magnetic roller 32 moves from the narrow gap d4 to the wide gap d.
Since it rotates in the direction of 3, toner is not replenished. Also, stirring s35 and 36 move the toner between the magnetic roller 32 and sleeve 3.
Although it rotates in a direction away from the toner, since it rotates at a very low speed and intermittently, there is no problem in practice, and the action of loosening the toner can be sufficiently performed.
トナーが消費されて補給信号がセンサＳから発せられる
とリレーコイルＲが電源Ｅ２で作用し、その接点を常開
ＮＯに切換えるため、モータＭは電源Ｅ２により回転方
向を反転しトナー補給を、リレーコイルＲへの通電が切
れるまで行う。When the toner is consumed and a replenishment signal is issued from the sensor S, the relay coil R is actuated by the power supply E2 and its contact is switched to normally open NO. Therefore, the motor M reverses the direction of rotation by the power supply E2 and the relay Continue until the current to coil R is cut off.
この構成にすると前記のレバー３９方向クラツチ３８φ
カム４０等を必要としないで構成が簡単になる。With this configuration, the aforementioned lever 39 direction clutch 38φ
The configuration becomes simple as the cam 40 etc. are not required.
以上記載のように、トナー補給中はもとより、トナーを
補給しない現像中にも、現像部内のトナー撹拌、センサ
面の払拭作用を行わせるからセンサの作用精度の信頼度
が高い。しかも現像中の撹拌作用は現像スリーブ駆動機
構に簡単に連動させ、又は無関係に補給モータＭの可逆
転により行わせることによって簡素化される。As described above, since toner agitation in the developing section and wiping action on the sensor surface are performed not only during toner replenishment but also during development without toner replenishment, the reliability of the sensor's operation accuracy is high. Moreover, the agitation action during development can be simplified by simply interlocking with the developing sleeve drive mechanism or by independently performing it by reversibly reversing the replenishment motor M.
ホッパ部Ｈのトナー量の検出は検出センサを設けてもよ
い。又はセンサＳの信号で補給磁気ローラ３２を動作さ
せ、その数回の回転でもセンサＳの信号が変らなければ
、ブザー・ランプ等で警告表示をしてカートリッジ４１
の交換補充を促す。A detection sensor may be provided to detect the amount of toner in the hopper section H. Alternatively, the replenishment magnetic roller 32 is operated by the signal from the sensor S, and if the signal from the sensor S does not change even after several rotations, a warning is displayed with a buzzer or lamp, etc., and the cartridge 41 is activated.
encourage replacement and replenishment.
空になったカートリッジ４１を第３図で１８００回しで
開孔４１ａを上向きにした状態で引き抜き、新しいカー
トリッジを差し込んで１８０°回して開孔４１ａを下に
向ける。４２はカートリッジ４１に設けた突起で、これ
をカートリッジホルダ４３の案内溝４４に合致させない
とカートリッジの抜き差しはできない。そのとき開孔４
１ａは上向きにある。The empty cartridge 41 is pulled out 1800 times in FIG. 3 with the opening 41a facing upward, and a new cartridge is inserted and turned 180° so that the opening 41a faces downward. Reference numeral 42 denotes a protrusion provided on the cartridge 41, and the cartridge cannot be inserted or removed unless it is aligned with the guide groove 44 of the cartridge holder 43. At that time, the opening 4
1a is facing upward.
そして第４図のようにカートリッジ４１を現像器奥側板
８の外に出るまで押し込むことによって開孔を下に向け
るように回し後る構成であるから、両端板７０８のカー
トリッジ受孔にトナーが洩れ、外に落下し、伝動歯車Ｇ
１−０５に付着し、各歯車間のかみ合い部に入り込み歯
溝底部に堆積固化して歯車相互間に斥力が発生し、伝動
の障害、歯車の破損を来たすおそれがある。As shown in FIG. 4, since the cartridge 41 is pushed in until it comes out of the back side plate 8 of the developing unit and rotated so that the opening faces downward, toner leaks into the cartridge receiving holes of the end plates 708. , falling outside, transmission gear G
1-05, enters the meshing portion between each gear, and is deposited and solidified at the bottom of the tooth groove, creating a repulsive force between the gears, which may cause transmission problems and damage to the gears.
そこで第１・２・４・１０図に示すように歯車の上部を
覆うひさし４５・４６を両側板７・８に設けて落下する
トナーが歯車Ｇ１〜Ｇ５に付着しないようにする。ひさ
しの長さｄ５は歯車の面よりも外に出る長さとする。Therefore, as shown in FIGS. 1, 2, 4, and 10, eaves 45 and 46 that cover the tops of the gears are provided on both side plates 7 and 8 to prevent falling toner from adhering to the gears G1 to G5. The length d5 of the eaves is set to extend beyond the surface of the gear.
上記のスリーブ３・ブレード３０には交流に直流を重量
したバイアスを印加してジャンピング現像で、磁極・濃
度・解像力等の効果を増大させる。A bias of alternating current and direct current is applied to the sleeve 3 and blade 30 to increase the effects of magnetic pole, density, resolution, etc. by jumping development.
なお現像スリーブ３にはその表面に形成されるトナー薄
層の軸線方向長さを決める図に省略したスクレーパが設
けられる。これ等の部材にもブレード３０を通じて同じ
バイアスが印加される。The developing sleeve 3 is provided with a scraper (not shown in the drawing) for determining the axial length of the thin toner layer formed on its surface. The same bias is applied to these members through the blade 30.
従って現像器には、前記のトナー補給用モータＭ、トナ
ー量検出センサＳ、現像バイアスの配線がある。例えば
■補給用モータＭはＤＣ２４Ｖ、■センサＳはＤＣ５Ｖ
、■現像バイアスはＡｃｔ６００Ｖ４００Ｈｚ＋ＤＣ５
００Ｖである。Therefore, the developing device includes the aforementioned toner replenishment motor M, toner amount detection sensor S, and development bias wiring. For example, ■Replenishment motor M is DC24V, ■Sensor S is DC5V
, ■Developing bias is Act600V400Hz+DC5
It is 00V.
上記■・■は配線を一緒に束ね一体のコネクタでもよい
、しかしモータＭを安価なＡＣ１００Ｖとすると別々の
配線・コネクタが必要となる。■は当然１拳２への周波
数影響を除く配線となる。In the above cases (2) and (2), the wiring may be bundled together and an integrated connector may be used, but if the motor M is an inexpensive AC100V, separate wiring and connectors will be required. ② is of course the wiring that excludes the frequency influence on 1 fist 2.
それ等が格別に現像器２内に配線され、且コネクタが現
像器２と複写機本体に対応して設けられる。従って現像
器の着脱の際、配線を引掛けないような周到な注意を要
し、それでも応々にして切断するおそれがある。These are specially wired inside the developing device 2, and connectors are provided corresponding to the developing device 2 and the main body of the copying machine. Therefore, when attaching and detaching the developing device, careful attention must be paid not to catch the wires, and even then, there is a risk that the wires may be cut.
そこで現像器２の側板の少しとも一方７を絶縁板性とし
、第１２・１３図に示すようにその板にセンサＳ用の配
線■とモータＭ用の配線■をプリント配線又は細線・導
電性プラスチックのインサート配線をする。５０はセン
サＳの端子とその配線■との接続部、５１はモータＭと
その配線■との接続部、５０ａ−５０ｂ、５１ａ・５１
ｂは夫々センサ配線■・モータ配線■の現像器側と本体
側との対面するコネクタ一端子である。Therefore, at least one of the side plates 7 of the developing device 2 is made of an insulating plate, and as shown in Figs. Make plastic insert wiring. 50 is a connecting part between the terminal of the sensor S and its wiring ■, 51 is a connecting part between the motor M and its wiring ■, 50a-50b, 51a, 51
b denotes one terminal of the connector facing the developer side and the main body side of the sensor wiring (2) and motor wiring (2), respectively.
第２図の状態で現像器２を差し込み、第１図の位置にセ
ットすると端子５０ａ・５０ｂ、５１ａ・５１ｂは相互
に当接して電路を接続するように構成する。When the developing device 2 is inserted in the state shown in FIG. 2 and set in the position shown in FIG. 1, the terminals 50a, 50b, 51a, 51b are constructed so as to come into contact with each other to connect an electric circuit.
現像バイアスは前記のように高電位であるから、別の配
線手段を必要とする。以下その実施例を述べる。ブレー
ド３０を取付ける現像部前、板２ａを導電板とし又はそ
の一部に導電部を設け、側板７の面に沿って設けた配線
板５３と電気的に接続する、その配線板５３の一端に接
触端子５４を形成し、本体側に絶縁台５５を介して取付
けた゛弾性端子５６を設け、現像器２が所定の位置（第
１図）にあるとき両端子５４・５６が接触する関係に配
置される。その本体側端子５６に本体内の高圧電源ＨＶ
Ｔが接続される。Since the developing bias is at a high potential as described above, another wiring means is required. An example will be described below. In front of the developing section to which the blade 30 is attached, the plate 2a is a conductive plate or a part thereof is provided with a conductive part, and is electrically connected to the wiring board 53 provided along the surface of the side plate 7, at one end of the wiring board 53. A contact terminal 54 is formed, and an elastic terminal 56 is provided which is attached to the main body side through an insulating stand 55, and the terminals 54 and 56 are arranged in a relationship such that when the developing device 2 is in a predetermined position (FIG. 1), both terminals 54 and 56 are in contact with each other. be done. The high voltage power supply HV inside the main body is connected to the main body side terminal 56.
T is connected.
前記のように現像器２を出し入れ案内兼回動軸９を中心
に傾けて現像位置にセットしたとき、現像器側端子５４
の回転軌跡線上に本体側端子を配置することによってブ
レード３０−スリーブ３へのバイアス回路が現像器２の
差し込み傾動で直ちに形成される。When the developing device 2 is tilted around the loading/unloading guide/rotating shaft 9 and set at the developing position as described above, the developing device side terminal 54
By arranging the terminal on the main body side on the rotation locus line, a bias circuit from the blade 30 to the sleeve 3 is immediately formed when the developing unit 2 is inserted and tilted.
上記の構成により現像器内の配線及びその配線と本体側
配線との現像器着脱時の切断機構の簡単９
化が行われる。The above configuration simplifies the wiring within the developing device and the disconnection mechanism between the wiring and the wiring on the main body side when the developing device is attached or removed.
第１４図はバイアス配線の他の実施例を示すもので、バ
イアス用配線板５３の一端の折曲部５７を側板７の穴か
らその内側に差し込んで押子２１のばね２２の受けを兼
用させ、操作レバー軸１２をバイアス電源ＨＶＴに接続
する。FIG. 14 shows another embodiment of the bias wiring, in which the bent part 57 at one end of the bias wiring board 53 is inserted into the hole in the side plate 7 and serves also as a receiver for the spring 22 of the pusher 21. , connect the operating lever shaft 12 to the bias power supply HVT.
現像器２が第１図のように現像位置にセットされ、押板
２４が押子２１に当接することによってバイアス回路を
閉じる。但しこの実施例では操作レバー５を絶縁材料で
作成し、或は操作レバー５の前側板７に対する係合穴１
６（第１図）の周囲を絶縁材料で形成する。The developing device 2 is set at the developing position as shown in FIG. 1, and the push plate 24 comes into contact with the pusher 21, thereby closing the bias circuit. However, in this embodiment, the operating lever 5 is made of an insulating material, or the engaging hole 1 of the operating lever 5 is made of an insulating material.
6 (FIG. 1) is formed with an insulating material.
上記の構成により現像器の本体に対する抜き差し時に電
気回路コネクタを抜き差しする必要がなく、現像器をセ
ットするレバー５の操作のみで自動的に断続できる。With the above configuration, there is no need to insert or remove the electric circuit connector when inserting or removing the developing device from the main body, and it is possible to automatically connect or disconnect the developing device by simply operating the lever 5 for setting the developing device.
なお上記の配線装置の精神は、クリーナ等にも適用する
ことができるものである。Note that the spirit of the wiring device described above can also be applied to cleaners and the like.
第１図は現像器を現像位置にセットした状態の０
側面図、第２図は現像器を複写機本体に対して抜き差し
する場合の側面図、第３図は現像器の横断側面図、第４
図は第１０図Ａ−Ａ線に沿う現像器の縦断面図、第５図
・第６図は操作レバーとこれに連動する一部の部品の分
解斜視図、第７図中第９図は感光ドラムと現像ローラと
現像器傾動軸との軸線合致機構を説明する図、第８図は
現像器の上レールと傾動軸の中央横断面図、第１０図は
現像器の第１図と反対側の側面図、第１１図は現像剤補
給用モータの回路図、第１２図は配線図、第１３図書第
１４図はブレードバイアス配線構造図。
１は感光ドラム、２は現像器、３は現像スリーブ、５は
操作レバー、６・１０は現像器の上部・下部の出し入れ
案内、１１は下部案内、７・８は現像器の側板、９は上
部案内兼現像器の傾動軸、２０は保隔子、２１は押子、
２２はばね、２４は押板。
噂
／鳩
＼３
区Figure 1 is a side view of the developing unit set in the developing position, Figure 2 is a side view of the developing unit being inserted into and removed from the main body of the copying machine, and Figure 3 is a cross-sectional side view of the developing unit. 4
The figure is a vertical cross-sectional view of the developing device taken along line A-A in Figure 10, Figures 5 and 6 are exploded perspective views of the operating lever and some parts interlocked with it, and Figures 7 and 9 are A diagram illustrating the axis alignment mechanism of the photosensitive drum, the developing roller, and the tilting shaft of the developer. Figure 8 is a central cross-sectional view of the upper rail and tilting shaft of the developer. Figure 10 is the opposite of Figure 1 of the developer. FIG. 11 is a circuit diagram of a developer replenishment motor, FIG. 12 is a wiring diagram, and FIGS. 13 and 14 are blade bias wiring structure diagrams. 1 is a photosensitive drum, 2 is a developing device, 3 is a developing sleeve, 5 is an operating lever, 6 and 10 are upper and lower loading and unloading guides of the developing device, 11 is a lower guide, 7 and 8 are side plates of the developing device, 9 is a The tilting shaft of the upper guide/developing device, 20 is a spacing element, 21 is a pusher,
22 is a spring, 24 is a push plate. Rumor/Pigeon\3 Ward
Claims (1)
する複写機に於て、 感光ドラムの回転軸線と平行する上・下部の案内に沿っ
て現像＾子機本体に対して抜き差しする構成とし、 その抜き差し時には現像器を上部案内を中心に傾動させ
て感光ドラムから離した状態に下部案内で保持し、 所定奥端位置まで差し込まれると上記案内による保持が
解除されて現像器は上部案内を中心に感光ドラム側に傾
動可能となり、 現像器に設けた保隔子が感光ドラムに当接してそのドラ
ムと現像スリーブとの間隔を一定に保つように構成した
ことを特徴とする現像装置。(1) In a copying machine that develops an electrostatic latent image formed on a photosensitive drum with a developer, the developing machine is inserted into and removed from the slave machine body along the upper and lower guides parallel to the rotational axis of the photosensitive drum. When inserting or removing the developing device, the developing device is tilted around the upper guide and held by the lower guide in a state away from the photosensitive drum. When the developing device is inserted to a predetermined deep end position, the holding by the guide is released and the developing device is removed. A developing device characterized in that it can be tilted toward the photosensitive drum side around an upper guide, and is configured such that a spacer provided on the developing device comes into contact with the photosensitive drum to maintain a constant distance between the drum and the developing sleeve. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57174886A JPS5964862A (en) | 1982-10-05 | 1982-10-05 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57174886A JPS5964862A (en) | 1982-10-05 | 1982-10-05 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5964862A true JPS5964862A (en) | 1984-04-12 |
| JPH0450593B2 JPH0450593B2 (en) | 1992-08-14 |
Family
ID=15986380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57174886A Granted JPS5964862A (en) | 1982-10-05 | 1982-10-05 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5964862A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5991460A (en) * | 1982-11-18 | 1984-05-26 | Fuji Xerox Co Ltd | Developing device attachment and detachment supporting mechanism of electrophotographic copying device |
| JPS625276A (en) * | 1985-06-29 | 1987-01-12 | Toshiba Corp | Developing device |
| JPS62146152U (en) * | 1986-03-08 | 1987-09-16 | ||
| JPH027663U (en) * | 1988-06-30 | 1990-01-18 | ||
| JPH02199487A (en) * | 1989-01-30 | 1990-08-07 | Tokyo Electric Co Ltd | Developing device |
| JPH04335672A (en) * | 1991-05-13 | 1992-11-24 | Bando Chem Ind Ltd | Loading structure for developing device |
| JPH08297389A (en) * | 1996-04-03 | 1996-11-12 | Ricoh Co Ltd | Driving device |
| US20190094793A1 (en) * | 2015-09-16 | 2019-03-28 | Sharp Kabushiki Kaisha | Image forming apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541241U (en) * | 1977-06-07 | 1979-01-06 | ||
| JPS552264A (en) * | 1978-06-20 | 1980-01-09 | Mita Ind Co Ltd | Developing device in electrophotographic copier |
| JPS57191652A (en) * | 1981-05-22 | 1982-11-25 | Fuji Xerox Co Ltd | Rocking mechanism for processing unit of copying machine |
-
1982
- 1982-10-05 JP JP57174886A patent/JPS5964862A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541241U (en) * | 1977-06-07 | 1979-01-06 | ||
| JPS552264A (en) * | 1978-06-20 | 1980-01-09 | Mita Ind Co Ltd | Developing device in electrophotographic copier |
| JPS57191652A (en) * | 1981-05-22 | 1982-11-25 | Fuji Xerox Co Ltd | Rocking mechanism for processing unit of copying machine |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5991460A (en) * | 1982-11-18 | 1984-05-26 | Fuji Xerox Co Ltd | Developing device attachment and detachment supporting mechanism of electrophotographic copying device |
| JPS625276A (en) * | 1985-06-29 | 1987-01-12 | Toshiba Corp | Developing device |
| JPS62146152U (en) * | 1986-03-08 | 1987-09-16 | ||
| JPH027663U (en) * | 1988-06-30 | 1990-01-18 | ||
| JPH02199487A (en) * | 1989-01-30 | 1990-08-07 | Tokyo Electric Co Ltd | Developing device |
| JPH04335672A (en) * | 1991-05-13 | 1992-11-24 | Bando Chem Ind Ltd | Loading structure for developing device |
| JPH08297389A (en) * | 1996-04-03 | 1996-11-12 | Ricoh Co Ltd | Driving device |
| US20190094793A1 (en) * | 2015-09-16 | 2019-03-28 | Sharp Kabushiki Kaisha | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0450593B2 (en) | 1992-08-14 |
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