JPS5810764A - Transferred paper peeling device for electronic copying machine - Google Patents

Abstract

PURPOSE:To peel surely a transferred paper without disturbing the toner image on the transferred paper, by bringing a conductive brush, to which a bias voltage is applied, to the transferred paper, which is brought closely into contact with a photoreceptor, to discharge the transferred paper. CONSTITUTION:The toner image, which is developed by a developing device, on the surface of a photoreceptor 1 is discharged by a discharger 2 and reaches a transfer equipment 3 and is transferred to a supplied transfer paper 4. The transferred paper 4 to which the toner image is transferred is brought closely into contact with the photoreceptor 1 and reaches a conductive brush 5. An AC bias voltage is applied to the brush from a power source 6, and tips of many conductive brush hairs 5b stood on the surface of a columnar core 5a are brought into contact with the transferred paper 4, which is brought closely into contact with the photoreceptor 1, while rotating in the direction of an arrow to discharge the transferred paper 4. Consequently, the attractive force of the transferred paper 4 is weakened, and the transfer paper 4 is peeled from the photoreceptor 1 by its solidity and weight. Thus, the transferred paper is peeled surely without disturbing the toner image on the transferred paper.

Description

【発明の詳細な説明】 この発明は導電性ブラシを用いて感光体より転写紙を剥
離する電子複写機の転写紙剥離装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer paper peeling device for an electronic copying machine that uses a conductive brush to peel a transfer paper from a photoreceptor.

従来電子複写機は感光体に形成されたトナー儂を転写紙
へ転写後感光体より転写紙を剥離して定着工種へ搬送し
ており、転写紙の剥離装置としては分離ベルトや剥離爪
等を用いたものや、転写紙を除電器により除電して感光
体との吸着力を弱め剥離する手段などが知られている。Conventionally, electronic copying machines transfer the toner formed on the photoreceptor to transfer paper, then peel the transfer paper from the photoreceptor and transport it to a fixing machine.The transfer paper peeling device uses a separation belt, a peeling claw, etc. There are known methods that use a static eliminator to remove static electricity from the transfer paper to weaken its adhesion to the photoreceptor and peel it off.

しかし前者の機械的に剥離する手段では剥離後転写紙上
のトナー儂に乱れや画倫欠損などを生じる不具合があり
、また後者の除電器により剥離するものでは除電器に高
圧電源を必要とすると同時に、除電器に交流コロナ放電
を使うため、オゾンが発生するなどの不具合があった。However, the former method of mechanically removing the toner has the disadvantage of causing disturbances in the toner on the transfer paper after peeling off, and defects in image quality, and the latter method of removing the toner using a static eliminator requires a high-voltage power source for the static eliminator. Since the static eliminator used AC corona discharge, there were problems such as the generation of ozone.

この発明はかかる不具合を改善する目的でなされたもの
で、バイアス電圧を印加した導電性ブラシを感光体と密
着した転写紙に接触させて転写紙の吸着力を弱めること
により、感光体より転写紙を剥離するようにした電子複
写機の転写紙剥離を提供して、転写紙上のトナー偉を乱
すことなく転写紙が確実に剥離できるよ５Ｋしたもので
ある。This invention was made with the aim of improving this problem, and by bringing a conductive brush to which a bias voltage has been applied into contact with the transfer paper that is in close contact with the photoconductor to weaken the suction force of the transfer paper, the transfer paper is moved from the photoconductor to the transfer paper. To provide a transfer paper peeling device for an electronic copying machine which is designed to peel off the transfer paper, and to ensure that the transfer paper can be peeled off without disturbing the toner particles on the transfer paper.

以下この発明を図示の実施例により詳述すると、図にお
いてＩは図示しない電子複写機の感光体で、周辺部に複
写すべき原稿な露光する光学系と、感光体１０表％に形
成された静電潜像を現像する現像装置（何れも図示せず
）などが設けられており、上記現像装置により現像され
た感光体１表面のトナー偉は除電器２により除電された
後転写器３に達し、図示しない給紙装置によって給紙さ
れた転写紙４へ転写される。トナー像の転写された転写
紙４は感光体１に密着した状態でこの装置の導電性ブラ
シ５へ達するようになっている。上記導電性ブラシ５は
電源６より交流（またはパルス）バイアス電圧の印加さ
れた円柱状コア５ｍの表面に多数の導電性ブラシ毛５ｂ
を植設した構造で、導電性ブラシ毛５１）の先端は感光
体１０表面に密着した転写紙４へ矢印の方向へ回転しな
がら接触してこれを除電するようＫなっており、上記導
電性ブラシ５による除電によって転写紙４の吸着力が弱
められ、転写紙４の腰と自重で感光体１より剥離される
。This invention will be described in detail below with reference to illustrated embodiments. In the figure, I is a photoreceptor (not shown) of an electronic copying machine, and an optical system for exposing an original to be copied is formed in the peripheral area, and a photoreceptor is formed on the photoreceptor at 10%. A developing device (none of which is shown) for developing an electrostatic latent image is provided, and the toner on the surface of the photoreceptor 1 developed by the developing device is neutralized by a static eliminator 2 and then transferred to a transfer device 3. and is transferred onto transfer paper 4 fed by a paper feeding device (not shown). The transfer paper 4 on which the toner image has been transferred reaches the conductive brush 5 of this device while being in close contact with the photoreceptor 1. The conductive brush 5 has a large number of conductive bristles 5b on the surface of a cylindrical core 5m to which an alternating current (or pulse) bias voltage is applied from a power source 6.
The tip of the conductive brush bristles 51) contacts the transfer paper 4 that is in close contact with the surface of the photoreceptor 10 while rotating in the direction of the arrow to eliminate static electricity. The attraction force of the transfer paper 4 is weakened by the neutralization by the brush 5, and the transfer paper 4 is peeled off from the photoreceptor 1 by its stiffness and its own weight.

感光体１より剥離された転写紙４は図示しない定着装置
へ送られて定着された後棲写機外へ排出される。The transfer paper 4 peeled off from the photoreceptor 1 is sent to a fixing device (not shown), where it is fixed, and then discharged from the photocopier.

なお上記実施例では導電性ブラシ５をロール状に形成し
たが第２図に示すように、感光体１０幅Ｋｉｔぼ轡しい
直線状に形成しても同様な効果が得られるものである。In the above embodiment, the conductive brush 5 is formed in a roll shape, but as shown in FIG. 2, the same effect can be obtained even if the conductive brush 5 is formed in a rectilinear shape with the width of the photoreceptor 10 being vague.

この発明は以上詳述したように感光体１に密着した転写
紙４にバイアス電圧を印加した導電性ブラシ５を接触さ
せて転写紙４を除電し、感光体１との吸着力を弱めるこ
とにより、転写紙４の腰及び自重で感光体：より転写紙
４を剥離するようにしたことから、従来の機械的に剥離
するもののような転写紙４上のトナー・儂の乱れや欠損
などの不具合が全く生じないと共に、導電性ブラシ５を
転写紙４に接触させて除電するため、従来の除電器のよ
うな高圧バイアス電源を必要としない。また放電を行な
わないので、オゾンが発生する虞れがないと共に、転写
紙４０含水Ｉや抵抗値、紙厚などに影響されることなく
常に適切な除電効果が得られるため、転写紙４の剥離が
確に行なえる。As described in detail above, this invention brings the conductive brush 5 applied with a bias voltage into contact with the transfer paper 4 that is in close contact with the photoreceptor 1 to remove the electricity from the transfer paper 4 and weaken the attraction force with the photoreceptor 1. Since the transfer paper 4 is peeled off from the photoreceptor by the elasticity and weight of the transfer paper 4, problems such as toner and toner particles on the transfer paper 4 are not disturbed or missing, unlike conventional mechanically peeled ones. In addition, since static electricity is removed by bringing the conductive brush 5 into contact with the transfer paper 4, a high-voltage bias power source like a conventional static eliminator is not required. In addition, since no discharge is performed, there is no risk of ozone generation, and an appropriate static elimination effect can always be obtained without being affected by the water content I, resistance value, paper thickness, etc. of the transfer paper 4, so that the transfer paper 4 can be peeled off. can be done reliably.

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

第１図はこの発明の一実施例を示す概略構成図、第２図
は他の実施例を示す概略構成図である。 Ｉは感光体、４は転写紙、５は導電性ブラシ。 ＠　１ 入 −ＮＮ −３交 、１ ） 一一一−〜〒 図 ＠２図FIG. 1 is a schematic diagram showing one embodiment of the present invention, and FIG. 2 is a schematic diagram showing another embodiment. I is a photoreceptor, 4 is transfer paper, and 5 is a conductive brush. @1 input-NN-3 cross, 1) 111-~〒 Figure @2 Figure

Claims (1)

【特許請求の範囲】[Claims] 転写工ｌ！において感光体１に密着した転写紙４に、バ
イアス電圧を印加した導電性ブラシ５を接触させて転写
紙４を除電することにより、感光体１より転写紙４を剥
離することを特徴とする電子複写機の転写紙剥離装置。Transcriptionist! In this electronic method, a conductive brush 5 to which a bias voltage is applied is brought into contact with the transfer paper 4 that is in close contact with the photoreceptor 1 to remove electricity from the transfer paper 4, thereby peeling the transfer paper 4 from the photoreceptor 1. Transfer paper peeling device for copying machines.