JP3718361B2 - Method for manufacturing photoconductor drum - Google Patents

Method for manufacturing photoconductor drum Download PDF

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Publication number
JP3718361B2
JP3718361B2 JP07598099A JP7598099A JP3718361B2 JP 3718361 B2 JP3718361 B2 JP 3718361B2 JP 07598099 A JP07598099 A JP 07598099A JP 7598099 A JP7598099 A JP 7598099A JP 3718361 B2 JP3718361 B2 JP 3718361B2
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Japan
Prior art keywords
photosensitive drum
processing liquid
photosensitive
photosensitive agent
agent
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Expired - Fee Related
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JP07598099A
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Japanese (ja)
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JP2000267305A (en
Inventor
栄 斎藤
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Kyocera Document Solutions Inc
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Kyocera Mita Corp
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Priority to JP07598099A priority Critical patent/JP3718361B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、素管の表面に感光剤を塗布してなる感光体ドラムの一端部から感光剤を除去する感光体ドラムの製造方法に関する。
【0002】
【従来の技術】
電子写真複写機に用いる感光体ドラムは、素管の表面に感光剤を塗布して形成される。感光剤を素管に塗布するには種々の方法があるが、生産性、コストなどの点で有利な浸漬法が一般に多用されている。この浸漬法は、一端部を治具で把持して垂直姿勢とした素管を、感光剤の液槽に浸漬した後、一定速度で引き上げることにより、素管の表面に感光剤を塗布するものである。
【0003】
ところで、感光体ドラムの両端部は、電子写真複写機に組み込んだ状態で、各種の部材が摺接する部分となるので、その両端部は感光剤の塗布されない部分とするのが好ましいが、前記浸漬法により感光剤を塗布した感光体ドラムでは、感光剤の液槽から引き上げるとき、下端となる部分まで感光剤が塗布されてしまう。このため、浸漬法により感光剤を塗布した感光体ドラムでは、その一端部から感光剤を除去する処理が必要になる。
【0004】
そこで、感光体ドラムの一端部から感光剤を除去するのに、従来より、以下に挙げるような種々の方法が採用されている。
(1)感光剤を溶解する溶剤からなる処理液の槽内に、感光体ドラムの一端部を浸漬し て、自然溶解により感光剤を除去する。
(2)感光体ドラムの一端部表面に柔軟性の板を摺接させて、感光剤を除去する(特開 昭60−170858号公報)。
(3)前記処理液の槽内に、感光体ドラムの一端部を浸漬した状態で、処理液を攪拌さ せる(たとえば、処理液を噴出するノズルにより処理液中に渦を発生させる)こ とにより、感光剤を除去する(特開昭63−63079号公報)。
【0005】
【発明が解決しようとする課題】
しかし、(1)の浸漬による感光剤除去方法は、感光剤が素管から自然溶解され、処理液に拡散されて除去されるものであるため、処理に時間がかかるという問題点がある。
また、(2)の板を感光体ドラムの一端部に摺接させる感光剤除去方法では、感光体ドラムから掻き取られた感光剤が板に溜まってしまうほか、板も磨耗するので、十分な除去効果が得られないという問題点がある。
また、(3)の攪拌による感光剤除去方法は、攪拌によって処理液に積極的に流れを起こすので、処理時間は短縮されるものの、処理液の液面が乱れるため、処理幅の精度が低下したり、処理液の飛沫のために品質低下を来すなどの問題点がある。
【0006】
上記の従来欠点に鑑み、本発明は、このような課題を解消し、感光体ドラムの端部から感光剤を、短い処理時間で精度よく除去できる感光体ドラムの製造方法を提供することを目的とする。
【0007】
【課題を解決するための手段】
上記の目的を達成するために本第1発明は、素管の表面に感光剤を塗布してなる感光体ドラムの一端部を、前記感光剤を溶解する溶剤からなる処理液の槽内に浸漬した状態で、前記処理液槽を、定速度で回転駆動させることで感光体ドラムの周囲にその回りを巡る処理液の流れを発生させて、感光体ドラムの一端部の感光剤を除去し、その除去された感光剤を前記処理液の流れによる遠心力で感光体ドラムの径方向に離散させる点に特徴がある。
この構成によれば、処理液に浸漬される感光体ドラムの端部の周囲に、感光体ドラムの回りを巡る処理液の流れができるので、その流れの遠心力により、感光体ドラムから溶解した感光剤が感光体ドラムからその径方向に効果的に離散することになり、感光体ドラムの端部から感光剤を、短い処理時間で精度よく除去できる。
【0008】
第2発明では、前記処理液を前記処理液槽でオーバーフローさせる点に特徴がある。
この構成によれば、感光体ドラムの端部の周囲を巡る処理液の流れによる遠心力のほか、オーバーフローによる処理液の放射方向への流れが加わるので、溶解した感光剤が感光体ドラムからその径方向により効果的に離散することになる。
【0009】
【発明の実施の形態】
次に本発明の一実施形態を図1に基づいて説明する。
図1は、この実施形態の感光体ドラムの製造方法の説明図を示す。同図において、感光体ドラム1は、浸漬法により素管の表面に感光剤を塗布したものであって、その一端から所定の幅部分は、浸漬処理時に感光剤が塗布されない非塗布部とされるが、他端部は感光剤が塗布されてしまっている。
【0010】
前記感光体ドラム1は、その非塗布部を上向きにして保持具2により垂直姿勢に吊り下げられ、感光剤を除去する下端部の所定幅までが、感光剤を溶解する有機系炭化水素の溶剤(たとえばテトラヒドロフラン)からなる処理液3を収容した円形の処理液槽4に浸漬される。前記保持具2は、処理液槽4の上方に配置した支持アーム5に昇降自在に垂設される昇降ロッド6と、この昇降ロッド6の下端に固定され感光体ドラム1の上端部に嵌着する保持具本体7とを有する。前記支持アーム5は、レール8に沿って走行移動する走行台9から横方向に張り出して設けられ、この支持アーム5に設けられる図示しない駆動装置により、前記昇降ロッド6が昇降駆動される。
【0011】
前記処理液槽4は、回転駆動装置11によって、感光体ドラム1の軸心を回転中心として回転駆動される。回転駆動装置11は、前記処理液槽4の下面中央に垂設された入力ギア12と、駆動源であるモータ13と、このモータ13の回転出力を前記入力ギア12に伝達する出力ギア14とからなる。
【0012】
前記構成のもとに、回転駆動装置11を作動させて、処理液槽4を、処理液3の液面が乱れない程度の一定の速度で回転させる。その回転速度としては、たとえば感光体ドラム1の管径が200mmφの場合、10rpm程度とするのが好ましい。このように、処理液槽4を回転させると、感光体ドラム1の周囲に、その回りを巡る処理液3の流れが生じるので、処理液3に浸漬された感光体ドラム1の下端部において、図1(B)に示すように、処理液3により溶解された溶出感光剤15が、前記処理液3の流れによる遠心力で感光体ドラム1の径方向に効果的に離散する。これにより、感光体ドラム1の端部から感光剤を、短い処理時間で精度よく除去できる。
【0013】
図2は、他の実施形態の感光体ドラムの製造方法の説明図を示す。この実施形態では、先の実施形態の構成に加えて、処理液供給経路16から、処理液槽4内に常時、処理液3が供給される。これにより、処理液槽4から処理液3が絶えずオーバーフローする。処理液槽4の下方には、処理液槽4からオーバーフローした処理液3を受け止める回収槽17が配置されている。
【0014】
前記処理液供給経路16は、処理液槽4の下面中央に垂設された入力ギア12の軸18内に設けられ処理液槽4内に連通する第1の液路パイプ19と、処理液3を溜める貯留槽22と前記液路パイプ19とを結ぶ第2の液路パイプ20と、この液路パイプ20の途中に設けられ貯留槽22の処理液3を処理液槽4に供給するポンプ21とで構成される。液路パイプ19,20はシール材23を介して連結され、これにより連結部のシールが図られるとともに、入力ギア12側の液路パイプ19が回転可能となる。入力ギア12の軸18は、回収槽17の底面を貫通して処理液槽4の下面中央に連結されるが、回収槽17の底面の軸貫通部にはシール材24が介挿される。これにより、軸貫通部のシールが図られるとともに、回収槽17に対して軸18が回転可能となる。回収槽17の底部は、排液パイプ25を介して貯留槽21に連通させてある。処理液槽4を回転駆動する回転駆動装置11や保持具2の構成は、先の実施形態の場合と同様である。
【0015】
この実施形態の場合、処理液槽4の回転により、下端部が処理液槽4に浸漬される感光体ドラム1の周囲を巡る処理液3の流れができるだけでなく、オーバーフローにより感光体ドラム1を中心としてその径方向に放散する処理液3の流れもできるので、感光体ドラム1の下端部で処理液3により溶解された溶出感光剤15がより効果的に離散する。これにより、感光体ドラム1の端部から感光剤を、より短い処理時間で精度よく除去できる。
【0016】
【発明の効果】
本発明は以上のように構成されるので、以下に記載する効果を奏する。
請求項1の発明においては、感光体ドラムに対して処理液槽を、定速度で回転駆動させることにより、処理液に浸漬される感光体ドラムの端部の周囲に、その回りを巡る処理液の流れが発生されその流れにより感光体ドラムの端部の感光剤を溶解することができ、また、その処理液の流れの遠心力により、感光体ドラムから溶解した感光剤を感光体ドラムの径方向に効果的に離散させることができる。その結果、感光体ドラムの端部から感光剤を、短い処理時間で精度よく、かつ、処理液の飛沫による品質低下を来すことなく除去できる。
【0018】
請求項2の発明においては、感光体ドラムの端部の周囲を巡る処理液の流れによる遠心力のほか、オーバーフローによる処理液の放射方向への流れが加わるので、溶解した感光剤が感光体ドラムからその径方向により効果的に離散させることができる。
【図面の簡単な説明】
【図1】 (A)は本発明の一実施形態に係る感光体ドラムの製造方法の構成を示す概略図、(B)はその作用説明図である。
【図2】 本発明の他の実施形態に係る感光体ドラムの製造方法の構成を示す概略図である。
【符号の説明】
1…感光体ドラム、3…処理液、4…処理液槽、11…回転駆動装置、16…処理液供給経路、17…回収槽、25…排液パイプ。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a photosensitive drum in which a photosensitive agent is removed from one end of a photosensitive drum formed by applying a photosensitive agent to the surface of a raw tube.
[0002]
[Prior art]
A photosensitive drum used in an electrophotographic copying machine is formed by applying a photosensitive agent to the surface of a raw tube. There are various methods for applying the photosensitizer to the base tube, and an immersion method advantageous in terms of productivity, cost, etc. is generally used. This dipping method is to apply the photosensitizer to the surface of the tube by dipping the tube in a vertical posture by holding one end with a jig and then pulling it up in a liquid tank of the photosensitizer. It is.
[0003]
By the way, since both end portions of the photosensitive drum are portions where various members are slidably contacted with each other when incorporated in the electrophotographic copying machine, it is preferable that both end portions be portions where the photosensitive agent is not applied. In a photosensitive drum coated with a photosensitive agent by the above method, when the photosensitive drum is lifted from the liquid tank of the photosensitive agent, the photosensitive agent is applied to the lower end portion. For this reason, in the photosensitive drum which apply | coated the photosensitive agent by the immersion method, the process which removes a photosensitive agent from the one end part is needed.
[0004]
In order to remove the photosensitive agent from one end of the photosensitive drum, various methods as described below have been conventionally employed.
(1) One end of the photosensitive drum is immersed in a processing solution tank made of a solvent that dissolves the photosensitive agent, and the photosensitive agent is removed by natural dissolution.
(2) A flexible plate is brought into sliding contact with the surface of one end of the photosensitive drum to remove the photosensitive agent (Japanese Patent Laid-Open No. 60-170858).
(3) The processing liquid is agitated in a state where one end of the photosensitive drum is immersed in the processing liquid tank (for example, a vortex is generated in the processing liquid by a nozzle for ejecting the processing liquid). To remove the photosensitizer (Japanese Patent Laid-Open No. 63-63079).
[0005]
[Problems to be solved by the invention]
However, the method (1) of removing the photosensitive agent by dipping has a problem that it takes time to process because the photosensitive agent is naturally dissolved from the raw tube and diffused into the processing solution.
In addition, in the photosensitive agent removing method (2) in which the plate is brought into sliding contact with one end portion of the photosensitive drum, the photosensitive agent scraped off from the photosensitive drum accumulates on the plate, and the plate is worn. There is a problem that the removal effect cannot be obtained.
In addition, in the method (3) of removing the photosensitive agent by stirring, the processing liquid is positively caused to flow by stirring, so that the processing time is shortened, but the liquid level of the processing liquid is disturbed, so the accuracy of the processing width is reduced. Or a drop in quality due to the splashing of the processing solution.
[0006]
SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention has an object to provide a method for manufacturing a photosensitive drum that can eliminate such problems and can accurately remove the photosensitive agent from the end of the photosensitive drum in a short processing time. And
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, one end of a photosensitive drum formed by applying a photosensitive agent to the surface of an element tube is immersed in a bath of a processing solution comprising a solvent for dissolving the photosensitive agent. In this state, the processing liquid tank is driven to rotate at a constant speed to generate a flow of processing liquid around the photosensitive drum to remove the photosensitive agent at one end of the photosensitive drum, The removed photosensitive agent is characterized in that it is dispersed in the radial direction of the photosensitive drum by a centrifugal force caused by the flow of the processing solution.
According to this configuration, since the processing liquid can flow around the photosensitive drum around the end of the photosensitive drum immersed in the processing liquid, it is dissolved from the photosensitive drum by the centrifugal force of the flow. The photosensitive agent is effectively dispersed in the radial direction from the photosensitive drum, and the photosensitive agent can be accurately removed from the end of the photosensitive drum in a short processing time.
[0008]
The second invention is characterized in that the processing liquid overflows in the processing liquid tank.
According to this configuration, in addition to the centrifugal force due to the flow of the processing liquid that flows around the edge of the photosensitive drum, a flow in the radial direction of the processing liquid due to the overflow is applied, so that the dissolved photosensitive agent is removed from the photosensitive drum. It will be more effectively discrete in the radial direction.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is an explanatory view of a method for manufacturing a photosensitive drum according to this embodiment. In the figure, a photosensitive drum 1 is obtained by applying a photosensitive agent to the surface of an element tube by an immersion method, and a predetermined width portion from one end thereof is a non-application portion where no photosensitive agent is applied during the immersion process. However, the other end has been coated with a photosensitive agent.
[0010]
The photosensitive drum 1 is suspended in a vertical posture by a holder 2 with its non-coating portion facing upward, and a solvent of an organic hydrocarbon that dissolves the photosensitive agent up to a predetermined width at the lower end portion for removing the photosensitive agent. It is immersed in a circular processing liquid tank 4 containing a processing liquid 3 made of (for example, tetrahydrofuran). The holder 2 is mounted on a support arm 5 disposed above the processing liquid tank 4 so as to be movable up and down, and is fixed to the lower end of the lift rod 6 and is fitted to the upper end of the photosensitive drum 1. And a holder body 7 to be used. The support arm 5 is provided so as to protrude laterally from a traveling platform 9 that travels along the rail 8, and the lifting rod 6 is driven up and down by a driving device (not shown) provided on the support arm 5.
[0011]
The processing liquid tank 4 is rotationally driven by the rotational driving device 11 with the axis of the photosensitive drum 1 as the rotational center. The rotation drive device 11 includes an input gear 12 suspended from the center of the lower surface of the processing liquid tank 4, a motor 13 as a drive source, and an output gear 14 that transmits the rotation output of the motor 13 to the input gear 12. Consists of.
[0012]
Based on the above configuration, the rotation driving device 11 is operated to rotate the processing liquid tank 4 at a constant speed that does not disturb the liquid level of the processing liquid 3. For example, when the tube diameter of the photosensitive drum 1 is 200 mmφ, the rotation speed is preferably about 10 rpm. As described above, when the processing liquid tank 4 is rotated, a flow of the processing liquid 3 around the photosensitive drum 1 is generated. Therefore, at the lower end portion of the photosensitive drum 1 immersed in the processing liquid 3, As shown in FIG. 1B, the elution photosensitive agent 15 dissolved by the processing solution 3 is effectively dispersed in the radial direction of the photosensitive drum 1 by the centrifugal force generated by the flow of the processing solution 3. Thereby, the photosensitive agent can be accurately removed from the end portion of the photosensitive drum 1 in a short processing time.
[0013]
FIG. 2 is an explanatory diagram of a method for manufacturing a photosensitive drum according to another embodiment. In this embodiment, in addition to the configuration of the previous embodiment, the processing liquid 3 is always supplied from the processing liquid supply path 16 into the processing liquid tank 4. Thereby, the processing liquid 3 constantly overflows from the processing liquid tank 4. A recovery tank 17 that receives the processing liquid 3 overflowed from the processing liquid tank 4 is disposed below the processing liquid tank 4.
[0014]
The processing liquid supply path 16 is provided in a shaft 18 of the input gear 12 that is suspended from the center of the lower surface of the processing liquid tank 4 and communicates with the processing liquid tank 4. A second liquid path pipe 20 that connects the storage tank 22 that stores water and the liquid path pipe 19, and a pump 21 that is provided in the middle of the liquid path pipe 20 and supplies the processing liquid 3 in the storage tank 22 to the processing liquid tank 4. It consists of. The liquid path pipes 19 and 20 are connected via a seal material 23, whereby the connecting portion is sealed and the liquid path pipe 19 on the input gear 12 side can be rotated. The shaft 18 of the input gear 12 passes through the bottom surface of the recovery tank 17 and is connected to the center of the lower surface of the treatment liquid tank 4, and a seal material 24 is inserted in the shaft penetration portion of the bottom surface of the recovery tank 17. As a result, the shaft penetrating portion is sealed, and the shaft 18 can rotate with respect to the collection tank 17. The bottom of the collection tank 17 is communicated with the storage tank 21 via the drainage pipe 25. The configurations of the rotation drive device 11 and the holder 2 that rotationally drive the treatment liquid tank 4 are the same as those in the previous embodiment.
[0015]
In the case of this embodiment, not only the processing liquid 3 flows around the periphery of the photosensitive drum 1 whose lower end is immersed in the processing liquid tank 4 due to the rotation of the processing liquid tank 4, but also the photosensitive drum 1 is removed by overflow. Since the processing liquid 3 that diffuses in the radial direction as a center can also flow, the elution photosensitive agent 15 dissolved by the processing liquid 3 at the lower end of the photosensitive drum 1 is more effectively dispersed. Thereby, the photosensitive agent can be accurately removed from the end of the photosensitive drum 1 in a shorter processing time.
[0016]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect described below.
In the invention of claim 1, the process liquid vessel to the photosensitive drum, by causing rotated at a constant speed, around the end portion of the photosensitive drum which is immersed in the treatment liquid, the treatment liquid surrounding thereabout The photosensitive agent at the end of the photosensitive drum can be dissolved by the flow, and the photosensitive agent dissolved from the photosensitive drum is removed by the centrifugal force of the processing liquid flow. It can be effectively dispersed in the direction. As a result, the photosensitive agent can be removed from the end portion of the photosensitive drum with high accuracy in a short processing time without causing deterioration in quality due to splashing of the processing solution.
[0018]
According to the second aspect of the invention, in addition to the centrifugal force caused by the flow of the processing liquid that circulates around the end portion of the photosensitive drum, a flow in the radial direction of the processing liquid is applied due to the overflow. Therefore, it is possible to effectively disperse in the radial direction.
[Brief description of the drawings]
FIG. 1A is a schematic diagram illustrating a configuration of a method for manufacturing a photosensitive drum according to an embodiment of the present invention, and FIG.
FIG. 2 is a schematic view showing a configuration of a method for manufacturing a photosensitive drum according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Photosensitive drum, 3 ... Processing liquid, 4 ... Processing liquid tank, 11 ... Rotation drive apparatus, 16 ... Processing liquid supply path, 17 ... Recovery tank, 25 ... Drainage pipe.

Claims (2)

素管の表面に感光剤を塗布してなる感光体ドラムの一端部を、前記感光剤を溶解する溶剤からなる処理液の槽内に浸漬した状態で、前記処理液槽を、定速度で回転駆動させることで感光体ドラムの周囲にその回りを巡る処理液の流れを発生させて、感光体ドラムの一端部の感光剤を除去し、その除去された感光剤を前記処理液の流れによる遠心力で感光体ドラムの径方向に離散させることを特徴とする感光体ドラムの製造方法。The processing bath is rotated at a constant speed while one end of a photosensitive drum formed by applying a photosensitive agent to the surface of the raw tube is immersed in a processing bath made of a solvent that dissolves the photosensitive agent. By driving, a flow of processing liquid around the photosensitive drum is generated, the photosensitive agent at one end of the photosensitive drum is removed, and the removed photosensitive agent is centrifuged by the flow of the processing liquid. A method of manufacturing a photosensitive drum, wherein the photosensitive drum is dispersed in the radial direction of the photosensitive drum by force. 前記処理液を前記処理液槽でオーバーフローさせることを特徴とする請求項1に記載の感光体ドラムの製造方法。  The method for manufacturing a photosensitive drum according to claim 1, wherein the processing liquid is overflowed in the processing liquid tank.
JP07598099A 1999-03-19 1999-03-19 Method for manufacturing photoconductor drum Expired - Fee Related JP3718361B2 (en)

Priority Applications (1)

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JP07598099A JP3718361B2 (en) 1999-03-19 1999-03-19 Method for manufacturing photoconductor drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07598099A JP3718361B2 (en) 1999-03-19 1999-03-19 Method for manufacturing photoconductor drum

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JP2000267305A JP2000267305A (en) 2000-09-29
JP3718361B2 true JP3718361B2 (en) 2005-11-24

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JP07598099A Expired - Fee Related JP3718361B2 (en) 1999-03-19 1999-03-19 Method for manufacturing photoconductor drum

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