JPH05134543A - Toner supplying device - Google Patents

Toner supplying device

Info

Publication number
JPH05134543A
JPH05134543A JP3300810A JP30081091A JPH05134543A JP H05134543 A JPH05134543 A JP H05134543A JP 3300810 A JP3300810 A JP 3300810A JP 30081091 A JP30081091 A JP 30081091A JP H05134543 A JPH05134543 A JP H05134543A
Authority
JP
Japan
Prior art keywords
toner
developing device
toner supply
spiral
lumps
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
JP3300810A
Other languages
Japanese (ja)
Inventor
Shinsaku Yoneda
真作 米田
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.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
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 Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Priority to JP3300810A priority Critical patent/JPH05134543A/en
Publication of JPH05134543A publication Critical patent/JPH05134543A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the drop of large toner lumps to a developing device by projectingly providing many crushing pieces for crushing the toner lumps along the wall of a dropping port formed on the side of a toner supplying pipe where the developing device is connected. CONSTITUTION:The dropping part 105 to drop the toner into the developing device is formed on the side of the toner supplying pipe 102 where the developing device is connected. The dropping port 105 is obliquely opened by increasing its opening width toward the front end. The many peak-shaped crushing pieces 106 are projectingly provided along the inclined port wall. The toner lumps are, therefore, finely crushed by the crushing means 106 at the time of falling of the toner lumps from the dropping port 105 even if the toners in a toner replenishing bottle are transported in the form of the large lumps to the dropping port 105 by a spiral 103. Then, the powdery or small lumped toners are supplied at all times within the developing device even if the pitch of the spiral 103 is reduced. The generation of the agitation defect in the developing device is consequently obviated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、複写機、プリンタ等の
画像形成装置におけるトナー供給装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner supply device in an image forming apparatus such as a copying machine or a printer.

【0002】[0002]

【従来の技術】複写機、プリンタ等の画像形成装置にお
いては、トナー補給ボトルから現像装置内にトナーを供
給するためのトナー供給装置が設けられている。このト
ナー供給装置の一例を図5に示す。図5のトナー供給装
置は、一端がトナー補給ボトルに、他端が現像装置にそ
れぞれ接続されたトナー供給パイプ1と、トナー供給パ
イプ1内に回転自在に内装されトナーを搬送するスパイ
ラル2とを備えており、トナー供給パイプ1の現像装置
接続側には、スパイラル2にて搬送されてきたトナーを
現像装置内に落下させる落下口3が形成されている。
2. Description of the Related Art An image forming apparatus such as a copying machine or a printer is provided with a toner supply device for supplying toner from a toner supply bottle into a developing device. An example of this toner supply device is shown in FIG. The toner supply device of FIG. 5 includes a toner supply pipe 1 having one end connected to a toner supply bottle and the other end connected to a developing device, and a spiral 2 rotatably installed in the toner supply pipe 1 for conveying toner. The toner supply pipe 1 is provided with a drop port 3 on the developing device connection side for dropping the toner conveyed by the spiral 2 into the developing device.

【0003】[0003]

【発明が解決しようとする課題】図5に示したトナー供
給装置においては、スパイラル2により搬送されてきた
トナーが落下口3から落ちるが、落下口3から落ちるト
ナーの量はスパイラル2の回転数とピッチで決まる。と
ころが、このスパイラル2のピッチが小さいと、所定の
トナー搬送量を確保するためにスパイラル2の回転数を
かなり高くする必要があり、騒音や振動が発生する。そ
こで、スパイラル2のピッチをある程度大きくして、回
転数を低くしているが、この場合、スパイラル2の各ピ
ッチ間に介在されたトナーが大きな塊となって現像装置
内に落下する場合がある。このように、大きなトナー塊
が現像装置内に落下すると、現像装置内で充分に攪拌で
きず攪拌不良となり、画像の劣化を生じさせる。
In the toner supply device shown in FIG. 5, the toner conveyed by the spiral 2 drops from the drop port 3, but the amount of toner dropped from the drop port 3 is the number of revolutions of the spiral 2. And it depends on the pitch. However, when the pitch of the spiral 2 is small, it is necessary to considerably increase the number of rotations of the spiral 2 in order to secure a predetermined toner conveyance amount, which causes noise and vibration. Therefore, although the pitch of the spiral 2 is increased to some extent to reduce the number of revolutions, in this case, the toner interposed between the pitches of the spiral 2 may drop into the developing device as a large lump. .. As described above, when a large lump of toner falls into the developing device, it cannot be sufficiently stirred in the developing device, resulting in poor stirring, which causes image deterioration.

【0004】本発明は、上記に鑑み、現像装置にトナー
を供給する際に、大きなトナー塊が落下するのを防止し
て画像劣化の発生を抑制するトナー供給装置の提供を目
的とする。
In view of the above, it is an object of the present invention to provide a toner supply device which prevents a large lump of toner from dropping when supplying toner to a developing device and suppresses the occurrence of image deterioration.

【0005】[0005]

【課題を解決するための手段】本発明による課題解決手
段は、トナー補給手段から現像装置内にトナーを供給す
るものであって、一端がトナー補給手段に、他端が現像
装置にそれぞれ接続されたトナー供給パイプと、トナー
供給パイプ内に回転自在に内装されトナーを搬送するス
パイラルとを備え、前記トナー供給パイプの現像装置接
続側には、前記スパイラルにて搬送されてきたトナーを
現像装置内に落下させる落下口が形成され、該落下口の
口壁に沿って、トナー塊を粉砕する多数の粉砕片が突設
されたものである。
According to the present invention, there is provided a means for supplying toner from a toner replenishing means into a developing device, one end of which is connected to the toner replenishing means and the other end of which is connected to the developing device. A toner supply pipe, and a spiral that is rotatably installed in the toner supply pipe to convey the toner. To the toner supply pipe connected to the developing device, the toner conveyed by the spiral is provided in the developing device. A drop port for dropping is formed, and a large number of crushed pieces for crushing toner lumps are provided along the wall of the drop port.

【0006】[0006]

【作用】上記課題解決手段において、トナー補給手段内
のトナーは、トナー供給パイプ内のスパイラルにてトナ
ー供給パイプの落下口まで搬送され、この落下口から現
像装置内に供給される。このとき、トナー塊を粉砕する
多数の粉砕片を、落下口の口壁に沿って突設しているか
ら、トナーがスパイラルにて落下口まで大きな塊となっ
て搬送されてきたとしても、トナー塊が落下口から落ち
る際に、粉砕片によって細かく砕かれる。このため、ス
パイラルのピッチを小さくしなくても、現像装置内には
常に粉状又は小塊状のトナーが供給され、現像装置内で
攪拌不良となることはない。よって、画像劣化の発生が
抑制される。
In the above means for solving the problems, the toner in the toner replenishing means is conveyed to the drop port of the toner supply pipe by the spiral in the toner supply pipe, and is supplied into the developing device from this drop port. At this time, since a large number of crushed pieces for crushing the toner lump are provided along the wall of the drop port, even if the toner is spirally conveyed to the drop port as a large lump, As the lumps fall from the drop mouth, they are finely crushed by the crushed pieces. For this reason, even if the spiral pitch is not reduced, powdery or small lump toner is always supplied into the developing device, and stirring failure does not occur in the developing device. Therefore, the occurrence of image deterioration is suppressed.

【0007】[0007]

【実施例】以下、本発明の一実施例を図1ないし図4に
基づいて詳述する。図1は本発明の一実施例に係るトナ
ー供給装置の要部斜視図、図2はトナー供給装置の外観
斜視図、図3はトナー供給装置の接続状態を示す断面
図、図4は複写機の作像部の構成を示す概略図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a perspective view of a main part of a toner supply device according to an embodiment of the present invention, FIG. 2 is an external perspective view of the toner supply device, FIG. 3 is a sectional view showing a connection state of the toner supply device, and FIG. 4 is a copying machine. 3 is a schematic diagram showing the configuration of an image forming unit of FIG.

【0008】まず、複写機の作像部の構成を図4を参照
しつつ説明する。図4において、4は複写紙上に複写画
像を形成する作像部4であって、作像部4は、図中矢印
で示す方向に回転する感光体ドラム41の周囲に、帯電
チャージャ42、現像装置43、転写チャージャ44、
分離チャージャ45およびクリーナ46を順次配設して
成る。そして、作像部4は、帯電チャージャ42によっ
て均一に帯電させた感光体ドラム41の外面に原稿像を
結像させて静電潜像を形成させた後、現像装置43によ
ってトナー像に顕像化し、転写チャージャ44によって
トナー像を複写紙上に転写し、残留トナーをクリーナ4
6で回収するように構成されている。なお、作像部4
は、この構成に限定されるものではなく、例えばベルト
状の感光体を用いたもの等、従来公知の他の構成の複写
処理部を用いることもできる。
First, the structure of the image forming unit of the copying machine will be described with reference to FIG. In FIG. 4, reference numeral 4 denotes an image forming unit 4 for forming a copied image on a copy sheet. The image forming unit 4 is provided with a charging charger 42 and a developing unit around a photosensitive drum 41 rotating in a direction indicated by an arrow in the drawing. Device 43, transfer charger 44,
The separation charger 45 and the cleaner 46 are sequentially arranged. Then, the image forming unit 4 forms an electrostatic latent image by forming an image of the document on the outer surface of the photoconductor drum 41 that is uniformly charged by the charging charger 42, and then develops a toner image by the developing device 43. And transfer the toner image onto the copy paper by the transfer charger 44 to remove the residual toner from the cleaner 4.
It is configured to collect at 6. The image forming unit 4
However, the present invention is not limited to this configuration, and it is also possible to use a copy processing unit having another conventionally known configuration such as one using a belt-shaped photoconductor.

【0009】現像装置43は、図3の如く、トナー供給
装置100を介してトナー補給ボトル101に接続され
ており、現像装置本体43aと、トナー供給装置100
から現像装置本体43a内に供給されたトナーを攪拌す
る攪拌ローラ43bと、感光体ドラム41にトナーを供
給する現像ローラ43cとを備えている。なお、攪拌ロ
ーラ43bおよび現像ローラ43cは、現像装置本体4
3aに回転自在に支持されている。
As shown in FIG. 3, the developing device 43 is connected to the toner supply bottle 101 via the toner supplying device 100, and the developing device main body 43a and the toner supplying device 100 are connected.
The developing device main body 43a is provided with a stirring roller 43b for stirring toner, and a developing roller 43c for supplying toner to the photosensitive drum 41. The stirring roller 43b and the developing roller 43c are the developing device main body 4
It is rotatably supported by 3a.

【0010】次に、本実施例の要部であるトナー供給装
置100について、図1ないし図3を参照しつつ説明す
る。トナー供給装置100は、トナー補給ボトル101
から現像装置43内にトナーを供給するものであって、
トナー供給パイプ102と、トナー供給パイプ102内
に回転可能に内装されトナーを搬送するスパイラル10
3とを備えている。なお、スパイラル103は、例えば
トナー供給パイプ102に回転自在に支持された回転軸
に取り付け回転可能とされている。
Next, the toner supply device 100, which is the main part of this embodiment, will be described with reference to FIGS. The toner supply device 100 includes a toner supply bottle 101.
To supply toner into the developing device 43 from
Toner supply pipe 102 and spiral 10 rotatably installed in toner supply pipe 102 to convey toner.
3 and 3. The spiral 103 is attached to, for example, a rotation shaft rotatably supported by the toner supply pipe 102 so as to be rotatable.

【0011】トナー供給パイプ102は、図3の如く、
L字形に形成されており、一端がトナー補給ボトル10
1に、他端が攪拌ローラ43bより上側にて現像装置本
体43aを貫通して現像装置43にそれぞれ接続されて
いる。そして、図2の如く、トナー供給パイプ102の
トナー補給ボトル接続側には、トナー補給ボトル101
が着脱自在に装着される装着手段104が設けられ、ト
ナー供給パイプ102の現像装置接続側には、図1の如
く、スパイラル102にて搬送されてきたトナーを現像
装置43内に落下させる落下口105が形成されてい
る。なお、装着手段104の構成については、公知技術
と同一であるので説明を省略する。
The toner supply pipe 102 is, as shown in FIG.
It is L-shaped and has a toner supply bottle 10 at one end.
1, the other end penetrates the developing device main body 43a above the stirring roller 43b and is connected to the developing device 43. Then, as shown in FIG. 2, the toner supply bottle 101 is provided on the toner supply bottle 102 side of the toner supply pipe 102.
1 is provided so that it can be detachably attached, and a drop opening for dropping the toner conveyed by the spiral 102 into the developing device 43 on the developing device connecting side of the toner supply pipe 102, as shown in FIG. 105 is formed. Note that the configuration of the mounting means 104 is the same as that of a known technique, and thus its description is omitted.

【0012】落下口105は、図1の如く、先端に行く
に従ってその開口幅を大きくして傾斜して開口されてい
る。そして、落下口105の傾斜口壁に沿って、トナー
塊を粉砕する多数の山形粉砕片106が突設されてい
る。これにより、落下口105は鋸歯状の段付き構造と
なっている。上記構成において、トナー補給ボトル10
1内のトナーは、トナー供給パイプ102内のスパイラ
ル103にてトナー供給パイプ102の落下口105ま
で搬送され、この落下口105から現像装置43内に供
給される。そして、現像装置43に供給されたトナー
は、攪拌ローラ43bにより攪拌され、現像ローラ43
cにより画像形成のために感光体ドラム41に供給され
る。
As shown in FIG. 1, the drop opening 105 is opened so that its opening width increases toward the tip and is inclined. A large number of chevron-shaped crushed pieces 106 for crushing the toner lumps are provided along the inclined opening wall of the drop opening 105. As a result, the drop port 105 has a sawtooth stepped structure. In the above configuration, the toner supply bottle 10
The toner in 1 is conveyed to the drop port 105 of the toner supply pipe 102 by the spiral 103 in the toner supply pipe 102, and is supplied from the drop port 105 into the developing device 43. Then, the toner supplied to the developing device 43 is agitated by the agitating roller 43b, and the developing roller 43b is agitated.
It is supplied to the photosensitive drum 41 for image formation by c.

【0013】このとき、トナー塊を粉砕する多数の粉砕
片106を、落下口105の口壁に沿って突設している
から、トナーがスパイラル103にて落下口105まで
大きな塊となって搬送されてきたとしても、トナー塊が
落下口105から落ちる際に、粉砕片106によって細
かく砕かれる。このため、スパイラル103のピッチを
小さくしなくても、現像装置43内には常に粉状又は小
塊状のトナーが供給され、現像装置43内で攪拌不良と
なることはない。よって、画像劣化の発生が抑制され
る。
At this time, since a large number of crushed pieces 106 for crushing the lump of toner are projected along the wall of the drop port 105, the toner is conveyed by the spiral 103 to the drop port 105 as a large lump. Even if it has been, when the toner lump falls from the dropping port 105, it is finely crushed by the crushing pieces 106. For this reason, even if the pitch of the spiral 103 is not reduced, powdery or small-sized toner is always supplied into the developing device 43, and stirring failure does not occur in the developing device 43. Therefore, the occurrence of image deterioration is suppressed.

【0014】なお、本発明は上記実施例に限定されるも
のではなく、本発明の範囲内で多くに修正および変更を
加え得ることは勿論である。例えば、粉砕片106の形
状については、山形以外にも落下口105の閉方向に突
出してトナー塊を粉砕する形状であれば何でもよい。
The present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made within the scope of the present invention. For example, the crushed piece 106 may have any shape other than the mountain shape as long as it projects in the closing direction of the drop port 105 and crushes the toner mass.

【0015】[0015]

【発明の効果】以上の説明から明らかな通り、本発明に
よると、落下口の口壁に沿って突設した多数の粉砕片に
よって、大きなトナー塊を細かく砕くことができるの
で、スパイラルのピッチを小さくしなくても、現像装置
内には常に粉状又は小塊状のトナーが供給され、攪拌不
良となることはない。
As is apparent from the above description, according to the present invention, a large toner lump can be finely crushed by a large number of crushed pieces protruding along the wall of the drop port, so that the spiral pitch can be reduced. Even if it is not made small, powdery or small lump toner is always supplied into the developing device, and the stirring failure does not occur.

【0016】したがって、画像劣化の発生を抑制できる
といった優れた効果がある。
Therefore, there is an excellent effect that the occurrence of image deterioration can be suppressed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例に係るトナー供給装置の要部
斜視図である。
FIG. 1 is a perspective view of a main part of a toner supply device according to an exemplary embodiment of the present invention.

【図2】トナー供給装置の外観斜視図である。FIG. 2 is an external perspective view of a toner supply device.

【図3】トナー供給装置の接続状態を示す断面図であ
る。
FIG. 3 is a cross-sectional view showing a connected state of the toner supply device.

【図4】複写機の作像部の構成を示す概略図である。FIG. 4 is a schematic diagram showing a configuration of an image forming unit of a copying machine.

【図5】従来のトナー供給装置の要部斜視図である。FIG. 5 is a perspective view of a main part of a conventional toner supply device.

【符号の説明】[Explanation of symbols]

43 現像装置 100 トナー供給装置 101 トナー補給ボトル 102 トナー供給パイプ 103 スパイラル 105 落下口 106 粉砕片 43 Developing Device 100 Toner Supply Device 101 Toner Supply Bottle 102 Toner Supply Pipe 103 Spiral 105 Drop Port 106 Grinding Piece

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】トナー補給手段から現像装置内にトナーを
供給するものであって、一端がトナー補給手段に、他端
が現像装置にそれぞれ接続されたトナー供給パイプと、
トナー供給パイプ内に回転自在に内装されトナーを搬送
するスパイラルとを備え、前記トナー供給パイプの現像
装置接続側には、前記スパイラルにて搬送されてきたト
ナーを現像装置内に落下させる落下口が形成され、該落
下口の口壁に沿って、トナー塊を粉砕する多数の粉砕片
が突設されたことを特徴とするトナー供給装置。
1. A toner supply pipe for supplying toner from a toner replenishing means into a developing device, one end of which is connected to the toner replenishing means and the other end of which is connected to the developing device.
The toner supply pipe includes a spiral that is rotatably installed and that conveys toner.On the developing device connection side of the toner supply pipe, there is a drop port that drops the toner conveyed by the spiral into the developing device. A toner supply device, characterized in that a large number of crushed pieces for crushing a lump of toner are provided along the wall of the drop opening.
JP3300810A 1991-11-15 1991-11-15 Toner supplying device Pending JPH05134543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3300810A JPH05134543A (en) 1991-11-15 1991-11-15 Toner supplying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3300810A JPH05134543A (en) 1991-11-15 1991-11-15 Toner supplying device

Publications (1)

Publication Number Publication Date
JPH05134543A true JPH05134543A (en) 1993-05-28

Family

ID=17889378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3300810A Pending JPH05134543A (en) 1991-11-15 1991-11-15 Toner supplying device

Country Status (1)

Country Link
JP (1) JPH05134543A (en)

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