JP2849270B2 - Toner supply device - Google Patents
Toner supply deviceInfo
- Publication number
- JP2849270B2 JP2849270B2 JP4100878A JP10087892A JP2849270B2 JP 2849270 B2 JP2849270 B2 JP 2849270B2 JP 4100878 A JP4100878 A JP 4100878A JP 10087892 A JP10087892 A JP 10087892A JP 2849270 B2 JP2849270 B2 JP 2849270B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- replenishing
- supply
- toner replenishing
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、現像槽にトナーを供給
するトナー補給部材を備えた画像形成装置のトナー補給
装置において、トナー補給部材のトナー供給能力を高め
るようにしたトナー補給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner replenishing device for an image forming apparatus having a toner replenishing member for supplying toner to a developing tank, the toner replenishing member having a higher toner supplying capability.
【０００２】[0002]
【従来の技術】従来のトナー補給装置は、図１１，１２
の如く、トナー補給槽１に、トナーを落下口２から現像
槽に供給するトナー搬送スクリュー３と、トナー搬送ス
クリュー３にトナーを供給する撹拌体４および掻上体５
とが内装されている。2. Description of the Related Art A conventional toner replenishing apparatus is shown in FIGS.
A toner conveying screw 3 for supplying the toner from the drop port 2 to the developing tank, a stirring member 4 and a scraping member 5 for supplying the toner to the toner conveying screw 3 as shown in FIG.
And are decorated.
【０００３】トナー搬送スクリュー３および撹拌体４
は、モータにより回転駆動され、掻上体５は、撹拌体４
の回転により軸周りに上下動され、これによってトナー
がトナー搬送スクリュー３側に押しやられる。[0003] Toner conveying screw 3 and stirring body 4
Is driven to rotate by a motor, and the scraper 5 is
The toner is pushed up and down around the axis by the rotation of, whereby the toner is pushed to the toner conveying screw 3 side.
【０００４】[0004]
【発明が解決しようとする課題】高濃度（例えば黒ベ
タ）の連続コピーを取った場合、現像槽のトナーが不足
して、多量のトナーを現像槽に供給しなければならな
い。しかしながら掻上体５によりトナー搬送スクリュー
３の片側のみからトナーがすくい上げられて供給される
と、トナー搬送スクリューへのトナー供給不足が発生
し、現像槽に充分なトナーが供給できず、安定したトナ
ー追従性を得られなかった。When a continuous copy of high density (for example, solid black) is made, the toner in the developing tank runs short and a large amount of toner must be supplied to the developing tank. However, if the toner is scooped and supplied from only one side of the toner conveying screw 3 by the scraping body 5, the toner supply to the toner conveying screw becomes insufficient, and sufficient toner cannot be supplied to the developing tank. Following ability was not obtained.
【０００５】本発明は、上記に鑑み、現像槽へのトナー
供給能力を向上させたトナー補給装置の提供を目的とす
る。SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a toner replenishing device having an improved ability to supply toner to a developing tank.
【０００６】[0006]
【課題を解決するための手段】本発明請求項１，２によ
る課題解決手段は、図１，２の如く、トナー補給槽２９
に、トナー補給口３８から現像槽１５にトナーを供給す
る回転自在なトナー補給部材３０が内装され、トナー補
給部材３０を中心としてその周囲にトナー貯蔵部３２，
３３が形成され、トナー貯蔵部３２，３３に、トナー補
給部材３０に向けてトナーを供給する複数のトナー搬送
部材３６ａ，３６ｂが設けられ、トナー補給部材３０に
対して回転方向上流側のトナー搬送部材３６ａのトナー
供給量が、回転方向下流側のトナー搬送部材３６ｂのト
ナー供給量よりも大となるように、回転方向上流側のト
ナー搬送部材３６ａのすくい部４２ａの大きさが、回転
方向下流側のトナー搬送部材３６ｂのすくい部４２ｂの
大きさよりも大とされたものである。The means for solving the problems according to the first and second aspects of the present invention is shown in FIGS.
, The rotatable toner supply member 3 0 supplying toner to the developing tank 15 from the toner supply port 38 is furnished, the toner reservoir 32 at its periphery around the toner supply member 3 0,
33 is formed, the toner storage unit 32, the toner supply member 3 0 into a plurality of toner transporting member 36a for supplying the toner toward, 36b are provided, the upstream side in the rotation direction of the toner replenishing member 30 Toner toner supply amount of the conveying member 36a is such that the larger than the toner supply amount of the toner conveying member 36b of the downstream side in the rotational direction, the size of the scoop portion 42a of the upstream side in the rotation direction of the toner conveying member 36a is, the direction of rotation The size is larger than the size of the rake portion 42b of the downstream toner transport member 36b.
【０００７】請求項３による課題解決手段は、図３，９
の如く、トナー補給槽２９に、トナー補給口３８から現
像槽１５にトナーを供給するトナー補給部材３０が内装
され、トナー補給部材３０を中心としてその周囲に複数
のトナー貯蔵部３２，３３が形成され、トナー貯蔵部３
２，３３に、トナー補給部材３０に向けてトナーを供給
するトナー搬送部材３５ａ，３５ｂが設けられ、トナー
搬送部材３５ａ，３５ｂを駆動する駆動部４５，４６
と、トナー搬送部材３５ａ，３５ｂの駆動タイミングを
異ならしめるように駆動部４５，４６を制御する制御部
４７とを備えたものである。The means for solving the problems according to claim 3 is shown in FIGS.
As shown in the figure, a toner supply member 30 for supplying toner from the toner supply port 38 to the developing tank 15 is provided in the toner supply tank 29, and a plurality of toner storage sections 32 and 33 are formed around the toner supply member 30. And the toner storage unit 3
2 and 33 are provided with toner conveying members 35a and 35b for supplying the toner toward the toner replenishing member 30, and drive units 45 and 46 for driving the toner conveying members 35a and 35b.
And a control unit 47 that controls the driving units 45 and 46 so that the driving timings of the toner conveying members 35a and 35b are made different.
【０００８】請求項４による課題解決手段は、図１０の
如く、トナー補給槽２９に、トナー補給口３８から現像
槽１５にトナーを供給するトナー補給部材３０が内装さ
れ、トナー補給部材３０を中心としてその周囲に複数の
トナー貯蔵部３２，３３が形成され、トナー貯蔵部３
２，３３に、トナー補給部材３０に向けてトナーを供給
するトナー搬送部材３６ａ，３６ｂが設けられ、トナー
搬送部材３６ａ，３６ｂを同周期で駆動する駆動部４
５，４６が設けられ、トナー搬送部材３６ａ，３６ｂの
すくい部５０ａ，５０ｂが櫛状に形成されたものであ
る。As shown in FIG. 10, a toner replenishing member 30 for supplying toner from the toner replenishing port 38 to the developing tank 15 is provided inside the toner replenishing tank 29, and the toner replenishing member 30 is mainly provided. A plurality of toner storage sections 32 and 33 are formed around the
2 and 33 are provided with toner conveying members 36a and 36b for supplying toner toward the toner replenishing member 30, and a driving unit 4 for driving the toner conveying members 36a and 36b in the same cycle.
5, 46 are provided, and the rake portions 50a, 50b of the toner conveying members 36a, 36b are formed in a comb shape.
【０００９】請求項５による課題解決手段は、トナー補
給槽２９に、トナー補給口３８を有したトナー通路３１
が形成され、トナー通路３１に現像槽１５にトナーを供
給する回転自在なトナー補給部材３０が内装され、トナ
ー補給部材３０に向けてトナーを掻き上げる揺動自在な
トナー搬送部材３６ａ，３６ｂは、トナー通路３１より
高く持ち上げられる。According to a fifth aspect of the present invention, there is provided a toner supply passage having a toner supply port in a toner supply tank.
Is formed, and a rotatable toner replenishing member 30 for supplying toner to the developing tank 15 is provided in the toner passage 31. The swingable toner conveying members 36a and 36b for scraping up the toner toward the toner replenishing member 30 include: It is lifted higher than the toner passage 31.
【００１０】[0010]
【作用】上記請求項１，２による課題解決手段におい
て、現像槽１５内の現像剤のトナー濃度が低下すると、
各トナー貯蔵部３２，３３内のトナー搬送部材３６ａ，
３６ｂによってトナーがトナー補給部材３０の周囲から
供給される。According to the first and second aspects of the present invention, when the toner concentration of the developer in the developing tank 15 decreases,
The toner conveying members 36a, 36a,
The toner is supplied from around the toner replenishing member 30 by 36b.
【００１１】このとき、トナー補給部材３０に対する回
転方向上流側からのトナー供給量と下流側からのトナー
供給量が異なる。その結果、回転方向上流側にトナーに
よる壁が形成され、回転方向下流側から供給されたトナ
ーの回転方向への圧力によって上流側から供給されたト
ナーは、トナー貯蔵部３２へ押し戻されることはない。[0011] At this time, the toner supply amount from the toner supply amount and the downstream side from the round <br/> rotation direction upstream side relative to the toner replenishing member 30 is different. As a result, a wall of the toner is formed on the upstream side in the rotation direction, and the toner supplied from the upstream side by the pressure in the rotation direction of the toner supplied from the downstream side in the rotation direction is not pushed back to the toner storage unit 32. .
【００１２】したがって、トナー補給部材３０へのトナ
ー供給量は減少せず、トナー補給部材３０に一定量以上
のトナーを供給することができる。Therefore, the amount of toner supplied to the toner replenishing member 30 does not decrease, and a certain amount or more of toner can be supplied to the toner replenishing member 30.
【００１３】請求項３において、一つのトナー搬送部材
３５ａからトナーが、トナー補給部材３０に供給されて
いるとき、他のトナー搬送部材３５ｂからはトナーが供
給されない。In the third aspect, when the toner is supplied from one toner conveying member 35a to the toner replenishing member 30, the toner is not supplied from the other toner conveying member 35b.
【００１４】このように、トナー供給のタイミングがず
れているので、トナー補給部材３０に同時にトナーが供
給されることはなく、トナー補給部材３０にかかる負荷
は大きくならない。As described above, since the toner supply timing is shifted, the toner is not supplied to the toner supply member 30 at the same time, and the load on the toner supply member 30 does not increase.
【００１５】請求項４において、トナー搬送部材３６
ａ，３６ｂは同期して回転され、トナー補給部材３０に
同時にトナーが供給される。しかし、すくい部５０ａ，
５０ｂが櫛歯状になっているので、トナーはその間から
こぼれ落ち、トナー供給量は一枚板の場合に比べて減
る。The toner conveying member 36 according to claim 4,
A and 36b are rotated synchronously, and toner is supplied to the toner supply member 30 at the same time. However, the rake section 50a,
Since 50b has a comb-like shape, the toner spills out from between them, and the toner supply amount is reduced as compared with the case of a single plate.
【００１６】トナー補給部材には必要以上のトナーは供
給されず、トナー補給部材にかかる負荷が軽減する。Unnecessary toner is not supplied to the toner supply member, and the load on the toner supply member is reduced.
【００１７】請求項５において、揺動自在なトナー搬送
部材３６ａ，３６ｂは、トナー通路３１よりも上まで持
ち上げられる。そのため、トナー補給部材３０の周囲か
ら常に一定レベル以上のトナーが供給される。In claim 5, the swingable toner conveying members 36a and 36b are lifted above the toner passage 31. Therefore, always toner above a certain level from the periphery of the toner supply member 3 0 is supplied.
【００１８】[0018]
（第一実施例）本実施例のトナー補給装置を備えた複写
機は、図５の如く、光学系１０と、画像形成部１１と、
カセット収納部１２とから構成され、画像形成部１１で
は、感光体ドラム１３の周囲に、帯電部１４、現像槽１
５、転写，剥離部１６、クリーニング部１７、除電部１
８が配されている。(First Embodiment) As shown in FIG. 5, a copying machine provided with a toner replenishing device of the present embodiment includes an optical system 10, an image forming unit 11,
The image forming unit 11 includes a charging unit 14 and a developing tank 1 around a photosensitive drum 13.
5, transfer / separation unit 16, cleaning unit 17, static elimination unit 1
8 are arranged.
【００１９】カセット収納部１２のカセットに収納され
た用紙は、給紙ローラを介してレジストローラ１９まで
搬送され、用紙ガイド２０を経て、感光ドラム１３の外
周上に給紙され、転写後、サクションベルト２１により
定着部２２に搬送されて定着後、排紙ローラ２３で排出
される。The paper stored in the cassette in the cassette storage section 12 is transported to a registration roller 19 via a paper feed roller, fed through a paper guide 20 onto the outer periphery of the photosensitive drum 13, and transferred to a suction roller. After being conveyed to the fixing unit 22 by the belt 21 and fixed, the sheet is discharged by the sheet discharge roller 23.
【００２０】現像槽１５には、図１，３に示すように、
マグネットローラ２４と、撹拌ローラ２５と、２個の搬
送スクリュー２６ａ，２６ｂとが回転自在に内装されて
いる。また、現像剤のトナー濃度を検出するトナー濃度
センサ２７が装着されている。なお、搬送スクリュー２
６ａ，２６ｂの間において、そのフロント側に仕切板２
８が配設されている。In the developing tank 15, as shown in FIGS.
A magnet roller 24, a stirring roller 25, and two conveying screws 26a and 26b are rotatably mounted inside. Further, a toner concentration sensor 27 for detecting the toner concentration of the developer is mounted. The transport screw 2
6a and 26b, a partition plate 2 is provided on the front side thereof.
8 are provided.
【００２１】現像槽１５のフロント側に、トナー補給槽
２９が配されており、トナー補給槽２９に、現像槽１５
にトナーを供給する回転自在なトナー補給部材３０が内
装され、トナー補給部材３０は、判割りパイプ状のトナ
ー通路３１に上半分が露出するように配されている。A toner replenishing tank 29 is provided on the front side of the developing tank 15.
A rotatable toner replenishing member 30 for supplying toner to the inside is provided, and the toner replenishing member 30 is disposed such that an upper half thereof is exposed to a toner passage 31 having a split pipe shape.
【００２２】トナー補給部材３０を中心としてその両側
下方に、トナー貯蔵部３２，３３が形成されている。ト
ナー補給部材３０の回転方向上流側に位置するトナー貯
蔵部３２は、回転方向下流側に位置するトナー貯蔵部３
３より大容量とされている。The toner storage sections 32 and 33 are formed below the toner replenishing member 30 on both sides thereof. The toner storage unit 32 located on the upstream side in the rotation direction of the toner replenishing member 30 includes the toner storage unit 3 located on the downstream side in the rotation direction.
The capacity is larger than 3.
【００２３】また、トナー補給槽２９の上部には、トナ
ーカートリッジ３４が配設されており、複写機の前扉を
開放したときにトナーの補給を行ないやすいようにされ
ている。A toner cartridge 34 is provided above the toner supply tank 29 so that toner can be easily supplied when the front door of the copying machine is opened.
【００２４】各トナー貯蔵部３２，３３には、図１，２
の如く、トナー搬送部材として、回転自在な撹拌羽根３
５ａ，３５ｂと、上下動自在な掻上げ羽根３６ａ，３６
ｂとがそれぞれ内装されている。Each of the toner storage units 32 and 33 has the configuration shown in FIGS.
And a rotatable stirring blade 3 as a toner conveying member.
5a, 35b, and a vertically movable lifting blade 36a, 36
b.
【００２５】トナー補給部材３０は、図３の如く、スク
リュー状とされ、その前端がトナー補給槽２９の前壁に
回転自在に支持され、後端は、トナー貯蔵部３２，３３
よりもリア側に突出した円筒３７に回転自在に支持され
ている。そして、円筒３７は、図４の如く、現像槽１５
の搬送スクリュー２６ａの上方まで達しており、下面に
トナー補給口３８が形成されている。As shown in FIG. 3, the toner replenishing member 30 is formed in a screw shape, the front end of which is rotatably supported by the front wall of the toner replenishing tank 29, and the rear ends of which are toner storage portions 32, 33.
It is rotatably supported by a cylinder 37 protruding more rearward. Then, the cylinder 37 is, as in FIG. 4, the developing tank 15
And a toner supply port 38 is formed on the lower surface.
【００２６】撹拌羽根３５ａ，３５ｂは、軸４０ａ，４
０ｂを挟んだ両側に平板状の撹拌部４１ａ，４１ｂが軸
４０ａ，４０ｂと一体に形成されたもので、軸４０ａ，
４０ｂは、トナー補給槽２９の前後壁に回転自在に支持
されている。The stirring blades 35a, 35b are connected to the shafts 40a, 4
The plate-like stirring portions 41a, 41b are formed integrally with the shafts 40a, 40b on both sides of the shaft 40a, 40b.
Reference numeral 40b is rotatably supported by front and rear walls of the toner supply tank 29.
【００２７】掻上げ羽根３６ａ，３６ｂは、断面へ字形
のすくい部４２ａ，４２ｂが軸４３ａ，４３ｂに一体に
形成されたもので、軸４３ａ，４３ｂは、撹拌羽根３５
ａ，３５ｂの軸４０ａ，４０ｂよりも上方のトナー補給
槽２９の前後壁に揺動自在に支持されている。The scraping blades 36a and 36b are formed by integrally forming rake portions 42a and 42b having a U-shaped cross section with the shafts 43a and 43b.
The toner supply tank 29 is swingably supported by the front and rear walls of the toner supply tank 29 above the shafts 40a and 40b of the rollers 35a and 35b.
【００２８】なお、すくい部４２ａ，４２ｂは、上死点
においてトナー通路３１の上端部３１ａよりも上側にく
るように、その軸４３ａ，４３ｂの位置と撹拌羽根３５
ａ，３５ｂの外径とが関係づけられている。The positions of the shafts 43a and 43b and the stirring blades 35 are set so that the rake portions 42a and 42b are located above the upper end 31a of the toner passage 31 at the top dead center.
a and 35b are associated with the outer diameters.
【００２９】一側のすくい部４２ａの幅Ｌ1は、他側の
すくい部４２ｂの幅Ｌ2の２〜３倍の長さとされてお
り、これによってすくい部４２ａのトナーの掻き上げ量
は、すくい部４２ｂの２〜３倍程度となる。The width L 1 of the rake portion 42a on one side is set to be two to three times the width L 2 of the rake portion 42b on the other side, whereby the amount of toner scraped up by the rake portion 42a is It is about two to three times the rake portion 42b.
【００３０】撹拌羽根３５ａ，３５ｂの軸４０ａ，４０
ｂには、それぞれ駆動部４５，４６としてモータがギア
を介して連結されている。そして、撹拌羽根３５ａ，３
５ｂの回転によって、掻上げ羽根３６ａ，３６ｂのすく
い部４２ａ，４２ｂに撹拌羽根３５ａ，３５ｂの撹拌部
４１ａ，４１ｂが下方から当接すると、掻上げ羽根３６
ａ，３６ｂはトナー通路３１の上端部３１ａよりも高い
位置まで上動され、撹拌羽根３５ａ，３５ｂが離間する
と、掻上げ羽根３６ａ，３６ｂは下動する。The shafts 40a, 40 of the stirring blades 35a, 35b
A motor is connected to b through a gear as drive units 45 and 46, respectively. And the stirring blades 35a, 3
When the stirring portions 41a, 41b of the stirring blades 35a, 35b contact the rake portions 42a, 42b of the stirring blades 36a, 36b from below by the rotation of the lifting blades 5b, the scraping blade 36
A and 36b are moved upward to a position higher than the upper end 31a of the toner passage 31, and when the stirring blades 35a and 35b are separated, the scraping blades 36a and 36b move downward.
【００３１】複写機内に、各駆動部４５，４６およびト
ナー補給部材３０のモータを駆動制御するマイクロコン
ピュータからなる制御部４７が設けられている。制御部
４７では、トナー濃度センサ２７によってトナー濃度が
低下したことが検出されると、トナー補給信号を出力し
て、駆動部４５，４６およびトナー補給部材３０のモー
タを駆動する機能を備えている。In the copying machine, there is provided a control unit 47 composed of a microcomputer for controlling the driving of the drive units 45 and 46 and the motor of the toner supply member 30. When the toner concentration sensor 27 detects that the toner concentration has decreased, the control unit 47 outputs a toner supply signal to drive the driving units 45 and 46 and the motors of the toner supply member 30. .
【００３２】上記構成において、現像槽１５のトナー濃
度センサ２７により現像剤のトナー濃度が低下したこと
が検知されると、制御部４７からトナー補給部材３０お
よび撹拌羽根３５ａ，３５ｂのモータを駆動してトナー
を補給させるトナー補給信号が出力される。In the above configuration, when the toner concentration sensor 27 in the developing tank 15 detects that the toner concentration of the developer has decreased, the controller 47 drives the toner supply member 30 and the motors of the stirring blades 35a and 35b. A toner replenishment signal for replenishing toner is output.
【００３３】これによつて、図２に示すように、各トナ
ー貯蔵部３２，３３内の撹拌羽根３５ａ，３５ｂが回転
すると、Ａ位置において撹拌羽根３５ａ，３５ｂの軸４
０ａ，４０ｂに当たつて停止していた掻上げ羽根３６
ａ，３６ｂに、撹拌羽根３５ａ，３５ｂの撹拌部４１
ａ，４１ｂが当接する。As a result, as shown in FIG. 2, when the stirring blades 35a and 35b in each of the toner storage sections 32 and 33 rotate, the shaft 4 of the stirring blades 35a and 35b is set at the position A.
Raising blades 36 stopped at 0a and 40b
a and 36b are provided with stirring portions 41 of stirring blades 35a and 35b.
a, 41b contact.
【００３４】撹拌羽根３５ａ，３５ｂの回転により掻上
げ羽根３６ａ，３６ｂは持ち上げられ、トナー通路３１
の上端部３１ａよりも上方に達したＢ位置まで上動され
る。このとき、トナー貯蔵部３２，３３内のトナーは、
撹拌羽根３５ａ，３５ｂにより撹拌されながら、掻上げ
羽根３６ａ，３６ｂのすくい部４２ａ，４２ｂによつて
すくい上げられ、トナー補給部材３０に両側から同時に
供給される。By the rotation of the stirring blades 35a and 35b, the scraping blades 36a and 36b are lifted, and
Is moved upward to a position B which has reached a position above the upper end 31a. At this time, the toner in the toner storage units 32 and 33 is
While being stirred by the stirring blades 35a and 35b, they are scooped up by the rake portions 42a and 42b of the scraping blades 36a and 36b, and are simultaneously supplied to the toner supply member 30 from both sides.
【００３５】さらに、撹拌羽根３５ａ，３５ｂが回転し
ていくと、掻上げ羽根３６ａ，３６ｂから離間し、掻上
げ羽根３６ａ，３６ｂは撹拌羽根３５ａ，３５ｂの軸４
０ａ，４０ｂに当たるＡ位置まで下動され、間欠的に上
下動が繰り返される。Further, as the stirring blades 35a and 35b rotate, they are separated from the scraping blades 36a and 36b, and the scraping blades 36a and 36b are rotated by the shaft 4 of the stirring blades 35a and 35b.
It is moved down to the position A corresponding to 0a, 40b, and the vertical movement is repeated intermittently.
【００３６】トナー補給部材３０に供給されたトナー
は、スクリューの回転により図３に示すように、トナー
通路３１を矢印ａ方向に搬送される。As shown in FIG. 3, the toner supplied to the toner replenishing member 30 is conveyed in the direction of arrow a through the toner passage 31 as shown in FIG.
【００３７】そして、円筒３７のトナー補給口３８から
現像槽１５内の搬送スクリュー２６ａ上に落下する。Then, the toner drops from the toner supply port 38 of the cylinder 37 onto the transport screw 26a in the developing tank 15.
【００３８】トナー補給装置のトナー補給動作の開始と
同時に駆動された搬送スクリュー２６ａ，２６ｂの回転
により、現像槽１５内に供給されたトナーは、現像剤と
撹拌されながら矢印ｂ方向、続いて矢印ｃ方向に搬送さ
れる。With the rotation of the conveying screws 26a and 26b driven simultaneously with the start of the toner replenishing operation of the toner replenishing device, the toner supplied into the developing tank 15 is stirred by the developer and is moved in the direction of arrow b, and then in the direction of arrow b. It is transported in the c direction.
【００３９】互いに逆方向に搬送される現像剤は、両ス
クリュー２６ａ，２６ｂの間の仕切板２８のない部分で
マグネットローラ２４側に向かって拡散される。The developer conveyed in opposite directions is diffused toward the magnet roller 24 at a portion where there is no partition plate 28 between the screws 26a and 26b.
【００４０】拡散された現像剤は、撹拌ローラ２５によ
りさらに撹拌されて、マグネットローラ２４に供給され
る。The diffused developer is further stirred by the stirring roller 25 and supplied to the magnet roller 24.
【００４１】このように、トナー補給部材３０に両側か
らトナーを供給することで常に一定レベル以上のトナー
がトナー補給部材３０に供給され、トナー補給部材３０
内のトナー搬送量を安定させることができる。As described above, by supplying the toner to the toner replenishing member 30 from both sides, the toner of a certain level or more is always supplied to the toner replenishing member 30 and the toner replenishing member 30 is supplied.
Can stabilize the toner transport amount.
【００４２】そのため、図６に示すように高濃度（例え
ば黒ベタ）連続コピーにおいて、トナーが大量に消費さ
れても、充分なトナーが供給され、安定したトナー追従
性を確保することができる。Therefore, as shown in FIG. 6, in continuous copying of high density (for example, solid black), even if a large amount of toner is consumed, a sufficient amount of toner is supplied, and stable toner follow-up properties can be ensured.
【００４３】また、図７に示すように、すくい部４２
ｃ，４２ｄの幅が等しい場合には、両側からのトナーの
供給量は同じになるため、トナー補給部材３０の回転方
向上流のすくい部４２ｃから掻き上げられたトナーが、
下流側のすくい部４２ｄにより掻き上げられたトナーの
回転方向側への圧力により押されて、反対側のトナー貯
蔵部３２まで逆流し、安定したトナー供給ができなかっ
た。Also, as shown in FIG.
If the widths of c and 42d are equal, the amount of toner supplied from both sides is the same, so that the toner scooped up from the rake portion 42c on the upstream side in the rotation direction of the toner supply member 30 is
The toner raked by the rake portion 42d on the downstream side is pushed by the pressure in the rotation direction side and flows backward to the toner storage portion 32 on the opposite side, so that stable toner supply was not possible.
【００４４】しかしながら、本実施例では、掻上げ羽根
３５ａ，３５ｂのすくい部４２ａ，４２ｂの幅が異なっ
ているので、図８に示すように、回転方向上流側のすく
い部４２ａにより掻き上げられたトナーで壁が形成さ
れ、回転方向下流側のすくい部４２ｂで掻き上げられた
トナーの回転方向への圧力によるトナー貯蔵部３２への
逆流を防止することができる。However, in the present embodiment, since the widths of the rake portions 42a and 42b of the scraping blades 35a and 35b are different, as shown in FIG. 8, the rake portions 42a and 42b are scraped by the rake portion 42a on the upstream side in the rotation direction. A wall is formed of the toner, so that the toner raked by the rake portion 42b on the downstream side in the rotation direction can prevent the toner from flowing back to the toner storage portion 32 due to the pressure in the rotation direction.
【００４５】そのため、トナー補給部材へのトナー供給
量が減少することなく、一定量以上のトナーを供給する
ことができ、安定したトナー供給を行える。As a result, a predetermined amount or more of toner can be supplied without reducing the amount of toner supplied to the toner supply member, and stable toner supply can be performed.
【００４６】また、掻上げ羽根３６ａ，３６ｂのすくい
部４２ａ，４２ｂの上死点が、トナー通路３１の上端部
３１ａより上になり、すくい部４２ａ，４２ｂがトナー
通路３１よりも上まで持ち上げられるので、トナー補給
部材３０の周囲から常に一定レベル以上のトナーを供給
することができ、安定したトナー供給が可能となる。The top dead center of the rake portions 42a and 42b of the scraping blades 36a and 36b is located above the upper end portion 31a of the toner passage 31 , and the rake portions 42a and 42b
Since lifted up above the channel 31, it can always supply the toner above a certain level from the periphery of the toner supply member 3 0, thereby enabling stable toner supply.
【００４７】なお、補給されたトナーを撹拌および搬送
（回転軸方向）するスクリュー２６ａにおいては、一点
補給（トナー補給口３８が一端部に存在するため、軸方
向全長にわたつての補給でなく、一点での補給）のた
め、その部分でのトナー量が少なくなる。そのため、現
像槽におけるトナー量の分布が均一化しないので、トナ
ー補給口３８付近に対応する領域においてカブリ等が生
じ、現像が不安定になることがある。In the screw 26a that stirs and conveys the replenished toner (in the direction of the rotation axis), one-point replenishment (because the toner replenishment port 38 is provided at one end, it is not necessary to replenish the toner over its entire length in the axial direction. (Supply at one point), the amount of toner in that portion is reduced. Therefore, since the distribution of the amount of toner in the developing tank is not uniform, fog or the like may occur in a region corresponding to the vicinity of the toner supply port 38, and development may become unstable.
【００４８】それを防止するため、スクリュー２６ａに
より搬送されるトナーを搬送方向に向けて徐々に多くか
つ早くする。これは、図３においてトナー補給口３８付
近のスクリュー２６ａのピッチＰ１を反対側のピッチＰ
２に対し、Ｐ１＜Ｐ２とするとよい。この場合、ピッチ
Ｐ１〜Ｐ２へと徐々に長くしていくとより効果的であ
る。To prevent this, the amount of toner conveyed by the screw 26a is gradually increased in the conveying direction and is made faster. This is because the pitch P1 of the screw 26a near the toner supply port 38 in FIG.
For 2, it is preferable that P1 <P2. In this case, it is more effective to gradually increase the pitch from P1 to P2.
【００４９】（第二実施例）上記第一実施例では、左右
の撹拌羽根３５ａ，３５ｂは同じ回転数で駆動されてい
るので、トナー補給部材３０にトナーが掻き上げられる
タイミングが同期し、左右から同時にトナーが供給され
る。(Second Embodiment) In the first embodiment, since the left and right stirring blades 35a and 35b are driven at the same rotational speed, the timing at which the toner is scraped up by the toner replenishing member 30 is synchronized. Are supplied at the same time.
【００５０】ところが、この場合、トナー補給部材３０
のスクリューにかかるトナー負荷が大きくなり、モータ
のロックやスクリューの軸受の破損等の不具合が発生す
ることがある。However, in this case, the toner replenishing member 30
In this case, the toner load applied to the screw may increase, and problems such as locking of the motor and breakage of the bearing of the screw may occur.
【００５１】そこで、本実施例のトナー補給装置では、
制御部４７が、撹拌羽根３５ａのモータの回転数と撹拌
羽根３５ｂのモータの回転数とを異ならしめるように各
駆動部４５，４６を制御している。Therefore, in the toner supply device of this embodiment,
The control unit 47 controls the driving units 45 and 46 so that the rotation speed of the motor of the stirring blade 35a and the rotation speed of the motor of the stirring blade 35b are different.
【００５２】すなわち、撹拌羽根３５ａは８〜１０ｒｐ
ｍ、撹拌羽根３５ｂは１２〜１５ｒｐｍとなるように設
定されており、掻上げ羽根３６ａ，３６ｂの掻き上げタ
イミングは非同期となる。That is, the stirring blade 35a is set at 8 to 10 rpm.
m, the stirring blade 35b is set to be 12 to 15 rpm, and the timing of the scraping of the scraping blades 36a, 36b is asynchronous.
【００５３】このように回転数を変えることによって、
トナーは、図９の如く、トナー補給部材３０に左右の掻
上げ羽根３６ａ，３６ｂによってタイミングがずらされ
て供給される。ただし、撹拌羽根３５ａ，３５ｂの回転
数の最小公倍数回に１回は同期するので、同時に供給さ
れることがある。By changing the rotation speed in this way,
As shown in FIG. 9, the toner is supplied to the toner replenishing member 30 with the timing shifted by the left and right scraper blades 36a and 36b. However, they are supplied at the same time because they are synchronized once at the least common multiple of the rotation speed of the stirring blades 35a and 35b.
【００５４】したがって、トナー補給部材にかかるトナ
ー負荷を軽減することができ、トナー補給部材のモータ
ロックや軸受の破損を回避して、安定したトナー供給量
を得ることができる。Therefore, the toner load on the toner replenishing member can be reduced, and the motor lock of the toner replenishing member and the breakage of the bearing can be avoided, and a stable toner supply amount can be obtained.
【００５５】（第三実施例）上記第二実施例では、左右
の撹拌羽根３５ａ，３５ｂのモータの回転数を変えて、
トナー補給部材３０にかかる負荷を軽減したが、本実施
例では、回転数は同じにしたままで、図１０の如く、掻
上げ羽根３６ａ，３６ｂのすくい部５０ａ，５０ｂを櫛
歯状に形成する。(Third Embodiment) In the second embodiment, the rotation speeds of the motors of the left and right stirring blades 35a and 35b are changed.
Although the load on the toner replenishing member 30 is reduced, in the present embodiment, the rake portions 50a and 50b of the scraping blades 36a and 36b are formed in a comb-tooth shape as shown in FIG. .
【００５６】なお、すくい部５０ａ，５０ｂは、櫛歯状
の凹凸が互い違いとなるように向かい合っている。The rake portions 50a and 50b face each other such that the comb-shaped irregularities are alternately arranged.
【００５７】このような構成において、撹拌羽根３５
ａ，３５ｂは同期して回転するので、トナー補給部材３
０に同時にトナーが供給される。しかし、掻上げ羽根３
６ａ，３６ｂのすくい部５０ａ，５０ｂが櫛歯状になっ
ているので、トナーはその間からこぼれ落ち、トナー供
給量は一枚板の場合に比べて減る。In such a configuration, the stirring blade 35
Since a and 35b rotate in synchronization, the toner replenishing member 3
0 is supplied with toner at the same time. However, the raised blade 3
Since the rake portions 50a and 50b of the 6a and 36b are comb-shaped, the toner spills out from between the rake portions 50a and 50b, and the toner supply amount is reduced as compared with the case of a single plate.
【００５８】したがって、トナー補給部材に必要以上の
トナーが供給されることはなく、トナー補給部材にかか
る負荷を軽減させることができる。Accordingly, unnecessary toner is not supplied to the toner replenishing member, and the load on the toner replenishing member can be reduced.
【００５９】なお、本発明は、上記実施例に限定される
ものではなく、本発明の範囲内で上記実施例に多くの修
正および変更を加え得ることは勿論である。Note that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention.
【００６０】撹拌羽根の駆動部として、モータを別個に
設けたが、１個のモータを用いてギアを介してそれぞれ
駆動してもよい。Although a motor is separately provided as a drive unit of the stirring blade, each of the blades may be driven by a single motor via a gear.
【００６１】このとき、第一実施例の場合、掻上げ羽根
のすくい部の大きさを異ならしめることによって、トナ
ー補給部材への左右からのトナー供給量を変えたが、撹
拌羽根の軸のギア比を変えることによって回転方向上流
側の撹拌羽根の回転数を下流側の撹拌羽根の回転数より
多くすることにより、左右からのトナー供給量を変えて
もよい。At this time, in the case of the first embodiment, the amount of toner supply from the left and right to the toner replenishing member was changed by changing the size of the rake portion of the scraping blade. By changing the ratio so that the rotation speed of the stirring blade on the upstream side in the rotation direction is higher than the rotation speed of the stirring blade on the downstream side, the toner supply amount from the left and right may be changed.
【００６２】しかも、このようにすることによって、各
撹拌羽根を非同期で回転させることができる。Further, by doing so, each stirring blade can be rotated asynchronously.
【００６３】[0063]
【発明の効果】以上の説明から明らかな通り、本発明の
請求項１，２によると、トナー補給槽に、回転自在なト
ナー補給部材が内装され、トナー補給部材を中心として
その周囲に形成された複数のトナー貯蔵部に、トナー補
給部材に向けてトナーを供給するトナー搬送部材が設け
られ、トナー補給部材に対して回転方向上流側のトナー
搬送部材のトナー供給量が、回転方向下流側のトナー搬
送部材のトナー供給量よりも大とされているので、回転
方向上流側から供給されたトナーで壁が形成され、回転
方向下流側から供給されたトナーの回転方向への圧力に
よるトナー貯蔵部への逆流を防止して、トナーの供給量
の低下を防止することができる。As is apparent from the above description, according to the first and second aspects of the present invention, a rotatable toner supply member is provided in the toner supply tank and is formed around the toner supply member. a plurality of the toner storage unit has, the toner conveying member for supplying toner is provided toward the toner supply member, the toner in the upstream side in the rotation direction of the toner replenishing member
Toner supply amount of the conveying member, the rotational direction downstream side toner transportable
Since the toner supply amount is larger than the toner supply amount of the feeding member, a wall is formed by the toner supplied from the upstream side in the rotation direction, and the toner is supplied to the toner storage unit by the pressure in the rotation direction of the toner supplied from the downstream side in the rotation direction. Can be prevented, and a decrease in the amount of supplied toner can be prevented.
【００６４】したがって、トナー補給部材へ一定量以上
のトナーを供給することができ、安定したトナー供給を
行える。Therefore, a certain amount or more of toner can be supplied to the toner supply member, and stable toner supply can be performed.
【００６５】請求項３によると、トナー補給部材にトナ
ーを供給するトナー搬送部材は、トナー補給部材へのト
ナー供給のタイミングが異なるように駆動制御されてい
るので、一度に大量のトナーが供給されることはなく、
トナー補給部材にかかるトナーによる負荷を軽減するこ
とができ、トナー補給部材の補給能力を阻害することな
く安定したトナー供給ができる。According to the third aspect, the toner conveying member for supplying the toner to the toner replenishing member is driven and controlled so that the timing of supplying the toner to the toner replenishing member is different, so that a large amount of toner is supplied at one time. Never
The load on the toner replenishing member due to toner can be reduced, and stable toner supply can be performed without hindering the replenishing ability of the toner replenishing member.
【００６６】請求項４によると、同周期で駆動されるト
ナー搬送部材のすくい部が櫛状に形成されているので、
トナーはすくい部の間からこぼれ落ち、トナー供給量が
減り、トナー補給部材に必要以上のトナーが供給される
ことはなく、トナー補給部材にかかる負荷を軽減させる
ことができる。According to the fourth aspect, since the rake portion of the toner conveying member driven in the same cycle is formed in a comb shape,
The toner spills out from between the rake portions, the toner supply amount is reduced, and more toner than necessary is not supplied to the toner supply member, and the load on the toner supply member can be reduced.
【００６７】請求項５によると、トナー補給部材に向け
てトナーを掻き上げる揺動自在なトナー搬送部材は、ト
ナー補給部材を内装したトナー通路より高く持ち上げら
れるので、トナー補給部材の周囲から常に一定レベル以
上のトナーを供給することができ、安定したトナー供給
が可能となる。According to the fifth aspect of the present invention, the swingable toner conveying member that lifts the toner toward the toner replenishing member is lifted higher than the toner passage in which the toner replenishing member is provided. It is possible to supply toner at a level or higher, and it is possible to supply toner stably.
【図１】本発明の第一実施例を示すトナー補給装置の断
面図FIG. 1 is a sectional view of a toner supply device according to a first embodiment of the present invention.
【図２】トナー補給槽の縦断面図FIG. 2 is a longitudinal sectional view of a toner supply tank.
【図３】現像槽およびトナー補給槽の横断面図FIG. 3 is a cross-sectional view of a developing tank and a toner supply tank.
【図４】トナー補給槽のトナー補給口部分の断面図FIG. 4 is a cross-sectional view of a toner supply port of the toner supply tank.
【図５】本実施例のトナー補給装置を備えた複写機の構
成図FIG. 5 is a configuration diagram of a copying machine provided with the toner supply device of the present embodiment.
【図６】高濃度連続コピーに対するトナー供給量の変化
を示す図FIG. 6 is a diagram showing a change in toner supply amount for high-density continuous copying.
【図７】すくい部の幅が同じ掻上げ羽根を用いたトナー
補給槽の断面図FIG. 7 is a cross-sectional view of a toner replenishing tank using a scraper blade having the same rake width.
【図８】すくい部の幅が異なる掻上げ羽根を用いたトナ
ー補給槽の断面図FIG. 8 is a cross-sectional view of a toner replenishing tank using a scraper blade having a different rake portion width.
【図９】本発明の第二実施例を示すトナー補給装置の断
面図FIG. 9 is a sectional view of a toner supply device according to a second embodiment of the present invention.
【図１０】本発明の第三実施例を示すトナー補給装置の
横断面図FIG. 10 is a cross-sectional view of a toner supply device according to a third embodiment of the present invention.
【図１１】従来のトナー補給槽の構成図FIG. 11 is a configuration diagram of a conventional toner supply tank.
【図１２】同じくその平面図FIG. 12 is a plan view of the same.
１５ 現像槽 ２９ トナー補給槽 ３０ トナー補給部材 ３１ トナー通路 ３２，３３ トナー貯蔵部 ３５ａ，３５ｂ 撹拌羽根 ３６ａ，３６ｂ 掻上げ羽根 ４２ａ，４２ｂ すくい部 ４５，４６ 駆動部 ４７ 制御部 15 Developing tank 29 Toner replenishing tank 30 Toner replenishing member 31 Toner passage 32, 33 Toner storage part 35a, 35b Stirring blade 36a, 36b Raising blade 42a, 42b Rake part 45, 46 Drive part 47 Control part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 兼重 正利 大阪府大阪市阿倍野区長池町22番22号 シャープ株式会社内 (56)参考文献 特開 昭62−138877（ＪＰ，Ａ) 特開 平４−240874（ＪＰ，Ａ) 実開 昭62−176852（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G03G 15/08──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masatoshi Kanegashi 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-62-138877 (JP, A) JP-A-4- 240874 (JP, A) Japanese Utility Model Sho 62-176852 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) G03G 15/08
Claims (5)
槽にトナーを供給する回転自在なトナー補給部材が内装
され、トナー補給部材を中心としてその周囲に複数のト
ナー貯蔵部が形成され、トナー貯蔵部に、トナー補給部
材に向けてトナーを供給する複数のトナー搬送部材が設
けられ、トナー補給部材に対して回転方向上流側のトナ
ー搬送部材のトナー供給量が、回転方向下流側のトナー
搬送部材のトナー供給量よりも大とされたことを特徴と
するトナー補給装置。A rotatable toner supply member for supplying toner from a toner supply port to a developing tank is provided in a toner supply tank, and a plurality of toner storage portions are formed around the toner supply member around the toner supply member. A plurality of toner conveying members for supplying toner toward the toner replenishing member are provided in the storage unit, and the amount of toner supplied from the toner conveying member on the upstream side in the rotation direction with respect to the toner replenishing member is reduced by the toner on the downstream side in the rotational direction.
A toner replenishing device, wherein the toner supply amount is larger than a toner supply amount of a conveying member.
て、回転方向上流側のトナー搬送部材のすくい部の大き
さが、回転方向下流側のトナー搬送部材のすくい部の大
きさよりも大とされたことを特徴とするトナー補給装
置。2. The toner replenishing device according to claim 1, wherein the size of the rake portion of the toner transport member on the upstream side in the rotation direction is larger than the size of the rake portion of the toner transport member on the downstream side in the rotation direction. A toner replenishing device characterized by the above-mentioned.
槽にトナーを供給するトナー補給部材が内装され、トナ
ー補給部材を中心としてその周囲に複数のトナー貯蔵部
が形成され、トナー貯蔵部に、トナー補給部材に向けて
トナーを供給するトナー搬送部材が設けられ、トナー搬
送部材を駆動する駆動部と、トナー搬送部材の駆動タイ
ミングを異ならしめるように駆動部を制御する制御部と
を備えたことを特徴とするトナー補給装置。3. A toner replenishing member for supplying toner from a toner replenishing port to a developing tank is provided in a toner replenishing tank, and a plurality of toner storing portions are formed around the toner replenishing member around the toner replenishing member. A toner conveying member for supplying toner toward the toner replenishing member, a driving unit for driving the toner conveying member, and a control unit for controlling the driving unit so as to vary the driving timing of the toner conveying member. A toner replenishing device characterized by the above-mentioned.
槽にトナーを供給するトナー補給部材が内装され、トナ
ー補給部材を中心としてその周囲に複数のトナー貯蔵部
が形成され、トナー貯蔵部に、トナー補給部材に向けて
トナーを供給するトナー搬送部材が設けられ、トナー搬
送部材を同周期で駆動する駆動部が設けられ、トナー搬
送部材のすくい部が櫛状に形成されたことを特徴とする
トナー補給装置。4. A toner replenishing member for supplying toner from a toner replenishing port to a developing tank is provided in the toner replenishing tank, and a plurality of toner storing portions are formed around the toner replenishing member around the toner replenishing member. A toner conveying member that supplies toner toward the toner replenishing member, a driving unit that drives the toner conveying member in the same cycle is provided, and a rake portion of the toner conveying member is formed in a comb shape. To supply toner.
トナー通路が形成され、トナー通路に現像槽にトナーを
供給する回転自在なトナー補給部材が内装され、トナー
補給部材を中心としてその周囲の下方に、複数のトナー
貯蔵部が形成され、トナー貯蔵部に、トナー補給部材に
向けてトナーを掻き上げる複数のトナー搬送部材が揺動
自在に設けられ、トナー搬送部材はトナー通路より高く
持ち上げられることを特徴とするトナー補給装置。5. A toner passage having a toner supply port is formed in the toner supply tank, and a rotatable toner supply member for supplying toner to the developing tank is provided in the toner passage. A plurality of toner storage sections are formed below the toner storage section, and a plurality of toner transport members that rake up toner toward the toner replenishing member are provided in the toner storage section so as to be swingable, and the toner transport members are lifted higher than the toner passage. And a toner replenishing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4100878A JP2849270B2 (en) | 1992-04-21 | 1992-04-21 | Toner supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4100878A JP2849270B2 (en) | 1992-04-21 | 1992-04-21 | Toner supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05297713A JPH05297713A (en) | 1993-11-12 |
| JP2849270B2 true JP2849270B2 (en) | 1999-01-20 |
Family
ID=14285589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4100878A Expired - Lifetime JP2849270B2 (en) | 1992-04-21 | 1992-04-21 | Toner supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2849270B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077544A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Mita Corp | Image forming apparatus |
| JP2008165068A (en) * | 2006-12-28 | 2008-07-17 | Brother Ind Ltd | Image forming apparatus and developer cartridge |
| EP2407829B1 (en) | 2006-12-28 | 2015-09-02 | Brother Kogyo Kabushiki Kaisha | Image forming device capable of positioning developing unit and developer cartridge precisely |
| US8050599B2 (en) | 2007-09-04 | 2011-11-01 | Kabushiki Kaisha Toshiba | Toner cartridge and image forming apparatus having toner cartridge |
-
1992
- 1992-04-21 JP JP4100878A patent/JP2849270B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05297713A (en) | 1993-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0282223B1 (en) | Device for circulating developer | |
| JP3766273B2 (en) | Developer | |
| JP2849270B2 (en) | Toner supply device | |
| JP2981812B2 (en) | Electrostatic latent image developing device | |
| US5353102A (en) | Two component developing apparatus in a printer | |
| JPH0850405A (en) | Developer stirring/carrying device | |
| JPH11133710A (en) | Developing device | |
| JPH03163479A (en) | Cross mixing duplex auger system | |
| JPH0934264A (en) | Developing device | |
| JP2009098286A (en) | Developing device and image forming apparatus | |
| JP3101056B2 (en) | Toner supply device | |
| US5572300A (en) | Developing device containing for storing developer having zoner and carrier | |
| JP3025988B2 (en) | Developer stirring and conveying device | |
| JPH05313489A (en) | Toner replenishing device | |
| JPH117195A (en) | Developing device | |
| JP2808536B2 (en) | Supply roller | |
| JPH11295978A (en) | Toner supply method and device therefor | |
| JPH0213981A (en) | Developing device | |
| JP3400620B2 (en) | Electrophotographic recording device | |
| JPH0713433A (en) | Developing device for electrophotographic device | |
| JP4243116B2 (en) | Developing device and electrostatic recording apparatus using the same | |
| JPH05323785A (en) | Toner replenishing device and toner replenishing method using it | |
| JPH05281857A (en) | Toner replenishing device | |
| JPH0766213B2 (en) | Toner supply device for copiers | |
| JPH11160988A (en) | Developing device and electrophotographic image forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081106 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091106 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091106 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101106 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111106 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111106 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121106 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121106 Year of fee payment: 14 |