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JP4520227B2 - Waste toner tank and image forming apparatus - Google Patents
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JP4520227B2 - Waste toner tank and image forming apparatus - Google Patents

Waste toner tank and image forming apparatus Download PDF

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JP4520227B2
JP4520227B2 JP2004186933A JP2004186933A JP4520227B2 JP 4520227 B2 JP4520227 B2 JP 4520227B2 JP 2004186933 A JP2004186933 A JP 2004186933A JP 2004186933 A JP2004186933 A JP 2004186933A JP 4520227 B2 JP4520227 B2 JP 4520227B2
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waste toner
tank
cylindrical body
toner tank
discharge
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JP2006010984A (en
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泰行 石本
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Ricoh Co Ltd
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Ricoh Co Ltd
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Description

本発明は、廃トナーを効率良く充填するための廃トナータンク及び画像形成装置に関する。   The present invention relates to a waste toner tank and an image forming apparatus for efficiently filling waste toner.

一般に、複写機やプリンタなどの画像形成装置は、転写後に感光体等に残留したトナーを回収する廃トナータンクを備えている。図4は従来の廃トナータンクの一例を示し、この廃トナータンク100は、入口101からタンク奥側に向けて廃トナーを搬送するためのスクリュー102を搭載し、スクリューを回転させることにより廃トナーの搬送が可能となる。このスクリュー102がない場合には廃トナータンク100内への廃トナー充填量が減少してしまい、廃トナータンク100の交換頻度が増すことにつながる。   In general, an image forming apparatus such as a copying machine or a printer includes a waste toner tank that collects toner remaining on a photoreceptor after transfer. FIG. 4 shows an example of a conventional waste toner tank. The waste toner tank 100 is equipped with a screw 102 for transporting waste toner from the inlet 101 toward the inner side of the tank, and the waste toner is rotated by rotating the screw. Can be transported. Without the screw 102, the amount of waste toner charged in the waste toner tank 100 decreases, leading to an increase in the frequency of replacement of the waste toner tank 100.

しかしながら、廃トナータンク内にスクリューを搭載する場合、部品点数、組立時間を増加してしまうという欠点があった。
本発明は、スクリューを搭載することなしに、廃トナーを十分に充填することができる廃トナータンク及び画像形成装置を提供することを目的とする。
However, when the screw is mounted in the waste toner tank, there is a disadvantage that the number of parts and the assembly time are increased.
SUMMARY OF THE INVENTION An object of the present invention is to provide a waste toner tank and an image forming apparatus capable of sufficiently filling waste toner without mounting a screw.

上記目的を達成するために、請求項1記載の発明は、画像形成装置に残留する廃トナーを収容する廃トナータンクにおいて、廃トナーを収容するタンク本体と、上面が廃トナー充填用ノズルに接続され、前記タンク本体に廃トナーを排出する下窄まり状の筒体と、を備え、前記筒体は、その下端に前記タンク本体に廃トナーを排出する排出穴を有し、前記筒体の外壁には、前記排出穴からの高さが互いに異なり、かつ、前記外壁の円周方向の位置が互いに異なる複数個の排出穴を有することを特徴とする。
請求項2の発明は、請求項1に記載の廃トナータンクにおいて、前記筒体は、下方に向けて段階的に径が小さくなる複数の筒体部を有し、各筒体部の外壁に、その円周方向の位置が互いに異なる複数個の排出穴を有することを特徴とする。
請求項3の発明は、請求項2に記載の廃トナータンクにおいて、
廃トナーを前記排出穴に導くために前記各筒体部の底面を該排出穴に向けて傾斜させたことを特徴とする。
請求項4の発明は、請求項1、2、又は3に記載の廃トナータンクにおいて、
前記タンク本体内に、排出手段に設けた前記各排出穴から排出される廃トナーを専用的に受け入れる、前記各排出穴に対応した区画を形成したことを特徴とする。
請求項5 の発明は、請求項1、2、3又は4に記載の廃トナータンクを組み込んだ画像形成装置にある。
In order to achieve the above object, according to a first aspect of the present invention, there is provided a waste toner tank for storing waste toner remaining in an image forming apparatus, wherein a tank main body for storing waste toner and an upper surface are connected to a waste toner filling nozzle. A constricted cylindrical body that discharges waste toner to the tank body, and the cylindrical body has a discharge hole for discharging waste toner to the tank body at a lower end thereof. The outer wall has a plurality of discharge holes whose heights from the discharge hole are different from each other and whose circumferential positions of the outer wall are different from each other.
According to a second aspect of the present invention, in the waste toner tank according to the first aspect, the cylindrical body includes a plurality of cylindrical body portions whose diameter gradually decreases downward, and is formed on an outer wall of each cylindrical body portion. And a plurality of discharge holes whose circumferential positions are different from each other .
The invention of claim 3 is the waste toner tank according to claim 2,
In order to guide the waste toner to the discharge hole, the bottom surface of each cylindrical body portion is inclined toward the discharge hole .
The invention of claim 4 is the waste toner tank according to claim 1, 2, or 3,
A section corresponding to each of the discharge holes is formed in the tank main body to receive exclusively the waste toner discharged from the discharge holes provided in the discharge means.
The invention of claim 5, Ru image forming apparatus near incorporating the waste toner tank according to claim 1, 2, 3 or 4.

本発明によれば、上面開口が廃トナー充填用ノズルに接続され、タンク本体に廃トナーを排出する下窄まり状の筒体を備え、前記筒体の外壁に、前記排出穴からの高さが互いに異なり、かつ、前記外壁の円周方向の位置が互いに異なる複数個の排出穴を有するので、廃トナータンクには、一箇所ではなく筒体のそれぞれの排出穴に対応する位置に廃トナーが排出される。よって、廃トナータンクには廃トナーが十分に充填されるので、廃トナータンクの交換頻度が増すことがないという所期の目的を達成することができる。
According to the present invention, the upper surface opening is connected to the waste toner filling nozzle, the tank body is provided with a constricted cylindrical body for discharging the waste toner, and the height from the discharge hole is formed on the outer wall of the cylindrical body. Are different from each other and have a plurality of discharge holes whose circumferential positions of the outer wall are different from each other. Therefore, the waste toner tank is not located at one place but at a position corresponding to each discharge hole of the cylinder. Is discharged. Therefore, since the waste toner tank is sufficiently filled with the waste toner, it is possible to achieve the intended purpose that the replacement frequency of the waste toner tank does not increase.

図面に基づき以下に本実施の形態を説明する。
図1は本発明の第1の実施形態に係る廃トナータンクの構成図である。廃トナータンク1は、タンク本体1aと、タンク本体1a内に配置される排出手段1bと、を備えている。排出手段1bは、下窄まり状(下方へ向かうほど径が漸減する形状)の筒体2を有し、その上面開口3は廃トナー充填用のノズル4に接続している。廃トナー5は筒体2の最下部の穴6からタンク本体1a内に充填されて行く。筒体2の外壁には高さが異なる穴7と8が形成されている。また、穴7と8は、その周方向位置も異なっている。タンク本体1a内の廃トナーの高さが穴7の高さまで来ると、最下部の穴6からは排出されにくくなり、穴7からタンク内に排出される。次に廃トナーの高さが穴8の高さまで来ると、穴7からは排出されにくくなるため、穴8からタンク内に充填される。このように徐々に下部の穴から廃トナーがタンク本体1a内に充填されていく。
このような構成においては、高さ及び周方向位置の異なる複数の穴からの充填となり、かつ廃トナーが落下する位置が異なるため、1箇所の穴からのみの充填量に比べ、廃トナーのタンク本体1a内への充填量を増大させることができる。
図2は本発明の第2の実施形態に係る廃トナータンクの構成図である。廃トナータンク9は、タンク本体9aと、タンク本体内に配置された排出手段9bとから成る。排出手段9bは、下方に向けて複数段階的に径が小さくなる複数の筒体部13、16、18から成る筒体10を有し、最上部の筒体部18の上面開口11は廃トナー充填用のノズル12に接続している。最下部の最小径の筒体部13の下面の穴14から廃トナー15はタンク本体9a内に充填されてゆき、筒体部13の直上に連結された径の大きい筒体部16の側面の穴17、次に径が大きい筒体部18の側面の穴19と、廃トナーが増えるに従いこれら上部の穴からもタンク本体内に廃トナー15が充填されていく。各穴17、19の周方向位置は異ならせてある。
The present embodiment will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of a waste toner tank according to the first embodiment of the present invention. The waste toner tank 1 includes a tank body 1a and discharge means 1b disposed in the tank body 1a. The discharge means 1b has a cylindrical body 2 having a narrowed shape (a shape in which the diameter gradually decreases as it goes downward), and an upper surface opening 3 thereof is connected to a nozzle 4 for filling waste toner. The waste toner 5 is filled into the tank body 1a through the hole 6 at the bottom of the cylindrical body 2. Holes 7 and 8 having different heights are formed on the outer wall of the cylindrical body 2. The holes 7 and 8 are also different in circumferential position. When the height of the waste toner in the tank main body 1a reaches the height of the hole 7, it becomes difficult to be discharged from the lowermost hole 6, and is discharged from the hole 7 into the tank. Next, when the height of the waste toner reaches the height of the hole 8, it is difficult to be discharged from the hole 7, so that the tank is filled from the hole 8. In this way, the waste toner is gradually filled into the tank body 1a from the lower hole.
In such a configuration, since the filling is performed from a plurality of holes having different heights and circumferential positions, and the position where the waste toner falls is different, the waste toner tank is compared with the filling amount from only one hole. The filling amount into the main body 1a can be increased.
FIG. 2 is a configuration diagram of a waste toner tank according to the second embodiment of the present invention. The waste toner tank 9 includes a tank body 9a and discharge means 9b disposed in the tank body. The discharge means 9b has a cylindrical body 10 composed of a plurality of cylindrical body portions 13, 16, and 18 whose diameter decreases in a plurality of steps downward, and the upper surface opening 11 of the uppermost cylindrical body portion 18 has waste toner. It is connected to the nozzle 12 for filling. Waste toner 15 is filled into the tank main body 9a from the hole 14 on the lower surface of the cylindrical portion 13 having the smallest diameter at the bottom and is formed on the side surface of the cylindrical portion 16 having a large diameter connected directly above the cylindrical portion 13. The waste toner 15 is filled into the tank body from the holes 17 and from the holes 19 on the side surface of the cylindrical portion 18 having the next largest diameter and the upper holes as the waste toner increases. The circumferential positions of the holes 17 and 19 are different.

図3は図2に示すタンク本体9aの内部を仕切板30、31によって三個の区画に仕切った場合の上面略図である。各筒体部13、16、18に夫々設けた穴14、17、19に対応して、廃トナータンク9のタンク本体9a内部を仕切った区画として、穴14に対して仕切った区画21、穴17に対して仕切った区画22、穴19に対して仕切った区画23を設ける。
このような構成においては、それぞれの穴に対応してタンク本体9a内を仕切った区画を設け、各穴からは専用的に対応する区画内にのみ廃トナーが排出されるので、タンク内の充填効率を向上させることが可能となる。また仕切った区画の面積(容積)に対して穴の個数も任意に設定することができる。
図4は本発明の第2の実施形態に係る廃トナータンクの変形例を示す構成図である。この実施形態では、排出手段9bを構成する筒体部16、18の各底面を構成する底板16a、18aが夫々側面に設けた穴17、19に向けて下向きに傾いている。このような構成においては、各筒体部内において廃トナーの各穴に向かっての流れが良くなり、廃トナーのつまりを防止することができ、それにより廃トナーのタンク本体9a内への充填量を向上させることができる。
FIG. 3 is a schematic top view when the inside of the tank body 9a shown in FIG. 2 is partitioned into three compartments by the partition plates 30 and 31. FIG. Corresponding to the holes 14, 17, and 19 provided in the cylindrical body portions 13, 16, and 18, respectively, a partition 21 and a hole partitioned from the hole 14 are partitioned as the interior of the tank body 9 a of the waste toner tank 9 A partition 22 partitioned with respect to 17 and a partition 23 partitioned with respect to the hole 19 are provided.
In such a configuration, a section partitioning the inside of the tank main body 9a is provided corresponding to each hole, and waste toner is discharged from each hole only into the corresponding section exclusively. Efficiency can be improved. Further, the number of holes can be arbitrarily set with respect to the area (volume) of the partitioned section.
FIG. 4 is a configuration diagram showing a modified example of the waste toner tank according to the second embodiment of the present invention. In this embodiment, the bottom plates 16a and 18a constituting the bottom surfaces of the cylindrical portions 16 and 18 constituting the discharge means 9b are inclined downward toward the holes 17 and 19 provided on the side surfaces, respectively. In such a configuration, the flow of the waste toner toward each hole in each cylindrical body portion is improved, and the clogging of the waste toner can be prevented, whereby the amount of waste toner filled in the tank body 9a. Can be improved.

本発明の第1の実施形態に係る廃トナータンクの構成図。1 is a configuration diagram of a waste toner tank according to a first embodiment of the present invention. FIG. 本発明の第2の実施形態に係る廃トナータンクの構成図。FIG. 6 is a configuration diagram of a waste toner tank according to a second embodiment of the present invention. 図2に示す廃トナータンクの内部を仕切った区画の上面図。FIG. 3 is a top view of a partition that partitions the interior of the waste toner tank shown in FIG. 2. 本発明の第2の実施形態に係る廃トナータンクの変形例を示す構成図。FIG. 10 is a configuration diagram showing a modified example of the waste toner tank according to the second embodiment of the present invention. 従来例に係る廃トナータンクの構成図。FIG. 6 is a configuration diagram of a waste toner tank according to a conventional example.

符号の説明Explanation of symbols

1 廃トナータンク、1a タンク本体、1b 排出手段、2 筒体、3 上面開口、4 ノズル、5 廃トナー、6、7、8 穴、9 廃トナータンク、9a タンク本体、9b 排出手段。   DESCRIPTION OF SYMBOLS 1 Waste toner tank, 1a tank main body, 1b discharge | emission means, 2 cylinder, 3 Top surface opening, 4 nozzle, 5 Waste toner, 6, 7, 8 hole, 9 Waste toner tank, 9a Tank main body, 9b discharge | emission means.

Claims (5)

画像形成装置に残留する廃トナーを収容する廃トナータンクにおいて、
廃トナーを収容するタンク本体と、
上面が廃トナー充填用ノズルに接続され、前記タンク本体に廃トナーを排出する下窄まり状の筒体と、を備え、
前記筒体は、その下端に前記タンク本体に廃トナーを排出する排出穴を有し、
前記筒体の外壁には、前記排出穴からの高さが互いに異なり、かつ、前記外壁の円周方向の位置が互いに異なる複数個の排出穴を有することを特徴とする廃トナータンク。
In a waste toner tank for storing waste toner remaining in the image forming apparatus,
A tank body for storing waste toner;
An upper surface is connected to a waste toner filling nozzle, and a constricted cylindrical body for discharging waste toner to the tank body, and
The cylindrical body has a discharge hole for discharging waste toner to the tank body at a lower end thereof,
The waste toner tank according to claim 1, wherein the outer wall of the cylindrical body has a plurality of discharge holes whose heights from the discharge hole are different from each other and whose positions in the circumferential direction of the outer wall are different from each other.
請求項1に記載の廃トナータンクにおいて、
前記筒体は、下方に向けて段階的に径が小さくなる複数の筒体部を有し、各筒体部の外壁に、その円周方向の位置が互いに異なる複数個の排出穴を有することを特徴とする廃トナータンク。
The waste toner tank according to claim 1,
The cylindrical body has a plurality of cylindrical body portions whose diameter gradually decreases downward, and a plurality of discharge holes whose circumferential positions are different from each other on the outer wall of each cylindrical body portion. A waste toner tank characterized by
請求項2に記載の廃トナータンクにおいて、
廃トナーを前記排出穴に導くために前記各筒体部の底面を該排出穴に向けて傾斜させたことを特徴とする廃トナータンク。
The waste toner tank according to claim 2,
A waste toner tank , wherein a bottom surface of each cylindrical body portion is inclined toward the discharge hole in order to guide the waste toner to the discharge hole .
請求項1、2又は3に記載の廃トナータンクにおいて、
前記タンク本体内に、排出手段に設けた前記各排出穴から排出される廃トナーを専用的に受け入れる、前記各排出穴に対応した区画を形成したことを特徴とする廃トナータンク。
The waste toner tank according to claim 1, 2 or 3,
A waste toner tank characterized in that a section corresponding to each of the discharge holes is formed in the tank body for receiving waste toner discharged from the discharge holes provided in the discharge means.
請求項1、2、3又は4に記載の廃トナータンクを組み込んだことを特徴とする画像形成装置。   An image forming apparatus comprising the waste toner tank according to claim 1.
JP2004186933A 2004-06-24 2004-06-24 Waste toner tank and image forming apparatus Expired - Fee Related JP4520227B2 (en)

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JP5376975B2 (en) * 2009-02-05 2013-12-25 キヤノン株式会社 Image forming apparatus

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JPS6225969U (en) * 1985-07-26 1987-02-17
JPS62137463U (en) * 1986-02-20 1987-08-29
JPS62164372U (en) * 1986-04-08 1987-10-19
JPS636478U (en) * 1986-06-30 1988-01-16
JPS6417559U (en) * 1987-07-22 1989-01-27
JPH0359693A (en) * 1989-07-28 1991-03-14 Seiko Epson Corp toner collection device

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