JP2006056657A - Image forming device - Google Patents

Image forming device Download PDF

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JP2006056657A
JP2006056657A JP2004239448A JP2004239448A JP2006056657A JP 2006056657 A JP2006056657 A JP 2006056657A JP 2004239448 A JP2004239448 A JP 2004239448A JP 2004239448 A JP2004239448 A JP 2004239448A JP 2006056657 A JP2006056657 A JP 2006056657A
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paper
image forming
additional
opening
cassette
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Shinya Kawakami
真也 川上
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Canon Inc
キヤノン株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress the leakage of noise in an extended paper feeder from a bottom surface opening part and protect the inside of an image forming device body against dust. <P>SOLUTION: When the extended feeder 2 is installed in the image forming device body 1, the opening part of the paper feed cassette of the image forming device body is automatically opened. Accordingly, since the opening part of the paper feed cassette of the extended paper feeder installed on the lowermost stage is kept closed, the noise inside the paper feeder can be prevented from leaking through the bottom opening part without causing any trouble in paper feeding operation, and the inside of the body can be protected against dust. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は複写機、プリンタ、ファクシミリ、MFP等の画像形成装置に関する。   The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile machine, and an MFP.
従来画像形成装置の中には画像形成装置本体に複数の用紙収納部及び給紙装置を備え、選択的に複数種類の記録紙が使用可能なものがある。   Some conventional image forming apparatuses include a plurality of paper storage units and paper feeding devices in the main body of the image forming apparatus, and a plurality of types of recording paper can be selectively used.
しかしながら複数の記録紙収納部を必要としないユーザーにとっては本体価格が高価になるため好ましくないため、オプションとして画像形成装置本体に設置可能な、記録紙収納部及び記録紙給紙機構を備えた増設給紙装置を設定することで装置本体価格の低減を図るものがある。   However, it is not preferable for users who do not need multiple recording paper storage units because the main unit price is expensive, so it can be installed in the main body of the image forming apparatus as an option and equipped with a recording paper storage unit and a recording paper feed mechanism There is an apparatus for reducing the price of the apparatus main body by setting a sheet feeding apparatus.
この種の増設給紙装置が設置可能な画像形成装置では例えば図9に示すように画像形成装置本体90に設置されている給紙カセット91に、増設給紙装置92から給送された記録紙が画像形成装置本体90の画像形成部に搬送される為の搬送路の開口部93が設けられている。同様に増設給紙装置92も複数台設置可能なため、増設給紙装置に設置されている給紙カセット94にも開口部95が設けられている(例えば、特許文献1参照)。
特公平04-27138号公報
In an image forming apparatus in which this type of additional paper feeder can be installed, for example, as shown in FIG. 9, the recording paper fed from the additional paper feeder 92 to the paper cassette 91 installed in the image forming apparatus main body 90 Is provided with an opening 93 in the conveyance path for conveying the image to the image forming unit of the image forming apparatus main body 90. Similarly, since a plurality of additional paper feeders 92 can be installed, the paper feed cassette 94 installed in the additional paper feeder is also provided with an opening 95 (see, for example, Patent Document 1).
Japanese Patent Publication No. 04-27138
しかしながら増設給紙装置を必要としないユーザーは画像形成装置本体に設置されている給紙カセットの搬送路の底面開口部903は開放したままである。また、増設給紙装置を1台もしくは複数台設置した場合も最下部に位置する増設給紙ユニットに設置されている給紙カセットの底面開口部905は開放したままである。   However, a user who does not need the additional sheet feeder remains open at the bottom opening 903 of the conveyance path of the sheet cassette installed in the image forming apparatus main body. Further, even when one or a plurality of additional paper feeding apparatuses are installed, the bottom opening 905 of the paper feeding cassette installed in the additional paper feeding unit located at the bottom remains open.
それにより画像形成装置本体もしくは増設給紙装置のモータ及びギヤの駆動音や衝撃音、記録紙の搬送音等さまざまな機内騒音が前記開口部903または開口部905から外部に漏洩する。また前記開口部903、または開口部905より粉塵等が画像形成装置本体内部に入り込み画像品質を劣化させる恐れがある。   As a result, various in-machine noises such as drive and impact sounds of motors and gears of the image forming apparatus main body or the extension sheet feeding apparatus, and conveyance sound of the recording paper leak from the opening 903 or the opening 905 to the outside. Further, dust or the like may enter the image forming apparatus main body from the opening 903 or the opening 905 and deteriorate the image quality.
そこで本発明の目的は画像形成装置本体及び増設給紙装置機内騒音の底面開口部からの漏洩を抑えると同時に粉塵等から画像形成装置本体内部を保護することにある。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress leakage from the bottom opening of the image forming apparatus main body and the additional paper feeder, and at the same time protect the inside of the image forming apparatus main body from dust and the like.
上記目的を達成するための本発明は、画像形成部と記録紙収納部を有する第1給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する画像形成装置本体と、該画像形成装置本体下部に1台または複数台着脱可能で、記録紙収納部を有する第2給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する増設給紙装置において、前記第1給紙カセット及び第2給紙カセットに、下部もしくは最下部に設置された前記増設給紙装置から給送された記録紙を上部に位置する前記画像形成装置本体へ搬送するためのガイド部である搬送路及び搬送路開口部を設けるとともに前記搬送路開口部を開閉可能なシャッタ部材を設け、前記画像形成装置本体に前記増設給紙装置が取り付けられていない場合は前記第1給紙カセットの開口部を閉じ、前記増設給紙装置の下部に別の増設給紙装置が取り付けられていない場合は前記第2給紙カセットの開口部を閉じ、前記画像形成装置本体に前記増設給紙装置が取り付けられると前記第1給紙カセットの開口部を開き、前記増設給紙装置の下部に別の増設給紙装置が取り付けられると前記第2給紙カセットの開口部を開く開閉機構を設けた事を特徴とする。   In order to achieve the above object, the present invention includes a first paper feed cassette having an image forming unit and a recording paper storage unit, and a paper feed mechanism for separating and feeding the recording paper stored in the recording paper storage unit one by one. An image forming apparatus main body, one or a plurality of the image forming apparatus main body detachably attached to the lower portion of the image forming apparatus main body, and a sheet of recording paper stored in the recording paper storage section. In an additional sheet feeding device having a sheet feeding mechanism that separates and feeds each one, the recording fed from the additional sheet feeding device installed in the lower or lowermost part of the first sheet feeding cassette and the second sheet feeding cassette The image forming apparatus main body is provided with a conveyance path and a conveyance path opening which are guide parts for conveying the paper to the image forming apparatus main body positioned at the top, and a shutter member capable of opening and closing the conveyance path opening. The additional paper feeder If not, close the opening of the first paper cassette. If no additional paper feeder is installed below the additional paper feeder, close the opening of the second paper cassette. When the additional paper feeder is attached to the image forming apparatus main body, the opening of the first paper feed cassette is opened, and when another additional paper feeder is attached to the lower part of the additional paper feeder, the second paper feeder is opened. An opening / closing mechanism that opens the opening of the paper cassette is provided.
上記構成により、画像形成装置本体及び増設給紙装置機内騒音の底面開口部からの漏洩を抑えると同時に粉塵等から画像形成装置本体内部を保護でき、安定した画像供給が可能になる。   With the above configuration, it is possible to suppress leakage from the bottom opening of the image forming apparatus main body and the additional paper feeder, and at the same time protect the inside of the image forming apparatus main body from dust and the like, thereby enabling stable image supply.
また、本発明は、前記開閉機構は前記シャッタ部材に設けられた突起形状と、下部に前記増設給紙装置装が取り付いていない場合にシャッタ部材を開口部閉塞方向へ附勢するバネ部材と、前記増設給紙装置に設けられた斜面を有する突起形状と、からなることを特徴とする。   Further, according to the present invention, the opening / closing mechanism has a protruding shape provided on the shutter member, and a spring member that urges the shutter member in the opening closing direction when the additional sheet feeding device is not attached to the lower portion, And a protrusion having a slope provided in the additional sheet feeder.
上記構成により、安価に画像形成装置本体及び増設給紙装置機内騒音の底面開口部からの漏洩を抑えると同時に粉塵等から画像形成装置本体内部を保護でき、安定した画像供給が可能になる。   With the above configuration, it is possible to inexpensively suppress the noise from the bottom opening of the image forming apparatus main body and the additional sheet feeding apparatus, and at the same time protect the inside of the image forming apparatus main body from dust and the like, thereby enabling stable image supply.
また、本発明は 、画像形成部と記録紙収納部を有する第1給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する画像形成装置本体と、該画像形成装置本体下部に1台または複数台着脱可能で、記録紙収納部を有する第2給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する増設給紙装置において、前記第1給紙カセット及び第2給紙カセットに、下部もしくは最下部に設置された前記増設給紙装置から給送された記録紙を上部に位置する前記画像形成装置本体へ搬送するためのガイド部である搬送路及び搬送路開口部を設けるとともに前記搬送路開口部を開閉可能なシャッタ部材を設け、前記増設給紙装置の前記画像形成装置本体への着脱を検知する検知手段と、前記給紙カセット1及び前記給紙カセット2の有無を検知する検知手段と、シャッタの開閉を行うシャッタ開閉機構及び開閉制御手段とを有することを特徴とする。   The present invention also provides an image forming apparatus having a first paper feed cassette having an image forming section and a recording paper storage section, and a paper feed mechanism for separating and feeding the recording paper stored in the recording paper storage section one by one. One or a plurality of units can be attached to and detached from the main body and the main body of the image forming apparatus, and a second paper feed cassette having a recording paper storage unit and a recording paper stored in the recording paper storage unit are separated and fed one by one. In the additional paper feeding device having a paper feeding mechanism, the recording paper fed from the additional paper feeding device installed at the lower part or the lowermost part of the first paper feeding cassette and the second paper feeding cassette is positioned at the upper part. The image forming apparatus main body of the additional sheet feeding apparatus is provided with a conveyance path and a conveyance path opening which are guide parts for conveying to the image forming apparatus main body and a shutter member capable of opening and closing the conveyance path opening. Detecting hand to detect attachment / detachment And a detecting means for detecting the presence or absence of the sheet feeding cassette 1 and the sheet feeding cassette 2, a shutter opening / closing mechanism for opening / closing the shutter, and an opening / closing control means.
上記構成により、確実に画像形成装置本体及び増設給紙装置機内騒音の底面開口部からの漏洩を抑えると同時に粉塵等から画像形成装置本体内部を保護でき、安定した画像供給が可能になる。   With the above configuration, it is possible to reliably suppress the noise from the bottom opening of the image forming apparatus main body and the additional sheet feeding apparatus, and at the same time protect the inside of the image forming apparatus main body from dust and the like, thereby enabling stable image supply.
また、本発明は、前記画像形成装置本体に前記増設給紙装置が取り付けられていない場合は前記第1給紙カセットの開口部を閉じ、前記増設給紙装置の下部に別の増設給紙装置が取り付けられていない場合は前記第2給紙カセットの開口部を閉じ、前記画像形成装置本体に前記増設給紙装置が取り付けられると前記第1給紙カセットの開口部を開き、前記増設給紙装置の下部に別の増設給紙装置が取り付けられると前記第2給紙カセットの開口部を開く、またいずれの場合も給紙カセットが所定の位置に無い場合はシャッタを閉じる制御を行うことを特徴とする。   Further, the present invention closes the opening of the first paper feed cassette when the additional paper feeder is not attached to the image forming apparatus main body, and another additional paper feeder is provided below the additional paper feeder. Is not attached, the opening of the second paper feeding cassette is closed, and when the additional paper feeding device is attached to the image forming apparatus main body, the opening of the first paper feeding cassette is opened, and the additional paper feeding is performed. When another additional paper feeding device is attached to the lower part of the device, the opening of the second paper feeding cassette is opened, and in either case, control is performed to close the shutter when the paper feeding cassette is not in a predetermined position. Features.
上記構成により、シャッタの開閉動作が給紙カセットの操作力に影響を与えず、安定した給紙カセット操作力を得ることができる。   With the above configuration, the shutter opening / closing operation does not affect the operation force of the sheet cassette, and a stable sheet cassette operation force can be obtained.
また、本発明は、増設給紙装置から記録紙を給紙する際にのみ、画像形成装置の第1給紙カセット及び該増設給紙装置の上方に位置する増設給紙装置の第2給紙カセットの開口部を開放することを特徴とする。   Further, according to the present invention, only when the recording paper is fed from the additional paper feeder, the first paper cassette of the image forming apparatus and the second paper feed of the additional paper feeder located above the additional paper feeder. The opening of the cassette is opened.
上記構成により、画像形成装置本体機内騒音及び増設給紙装置機内騒音の外部への漏洩をより減少することが可能になり、また給紙動作時以外の機内騒音の外部への漏洩を大幅に抑えることが可能となる。   With the above configuration, it is possible to further reduce the external noise of the image forming apparatus main body noise and the additional paper feeding apparatus internal noise, and greatly suppress the external noise leakage outside the paper feeding operation. It becomes possible.
また、本発明は、給紙動作をさせようとする増設給紙装置より上方に位置する第2給紙カセットの少なくとも1つが増設給紙装置の所定の位置に無い、または第1給紙カセットが画像形成装置本体の所定の位置に無いと検知した場合に給紙動作を禁止することを特徴とする。   Further, according to the present invention, at least one of the second paper feed cassettes located above the additional paper feeder to be fed is not at a predetermined position of the additional paper feeder, or the first paper cassette is The sheet feeding operation is prohibited when it is detected that the image forming apparatus main body is not at a predetermined position.
上記構成により、ガイド部材に案内されずに搬送される記録紙の紙先端ダメージや、紙詰まり等の搬送不具合を防止できる。   With the above-described configuration, it is possible to prevent a conveyance failure such as a paper leading edge damage of a recording sheet conveyed without being guided by the guide member or a paper jam.
以上説明したように、本発明によれば、給紙カセットの搬送路開口部に開閉可能なシャッタ部材を設け、前記画像形成装置本体に前記増設給紙装置が取り付けられていない場合に前記給紙カセットの開口部を閉じることで、増設給紙装置未装着時における画像形成装置本体機内騒音の前記開口部からの漏洩を抑えると同時に粉塵等から画像形成装置本体内部を保護でき、安定した画像供給が可能になる。   As described above, according to the present invention, an openable / closable shutter member is provided at the conveyance path opening of the sheet feeding cassette, and the sheet feeding is performed when the additional sheet feeding apparatus is not attached to the image forming apparatus main body. By closing the opening of the cassette, it is possible to suppress leakage from the opening of the image forming apparatus main body when the additional paper feeding device is not installed, and at the same time protect the inside of the image forming apparatus main body from dust, etc., and stable image supply Is possible.
また前記シャッタ部材に突起形状を設け、下部に前記増設給紙装置装が取り付いていない場合にシャッタ部材を開口部閉塞方向へ附勢するバネ部材と、前記増設給紙装置に設けられた斜面を有する突起形状とを設けることにより、前記開口部の開閉を安価に行うことが可能になる。   Also, a protrusion is provided on the shutter member, and a spring member for biasing the shutter member in the direction of closing the opening when the additional paper feeder is not attached to the lower part, and a slope provided on the additional paper feeder. By providing the protruding shape, the opening can be opened and closed at a low cost.
さらにそれらシャッタ開閉機構をカセット有無検知や増設給紙装置有無検知や給紙動作とリンクして制御することで確実に、増設給紙装置から記録紙を給紙する際にのみ、画像形成装置の第1給紙カセット及び該増設給紙装置の上方に位置する増設給紙装置の第2給紙カセットの開口部を開放することを特徴とする。   Furthermore, the shutter opening / closing mechanism is controlled by linking with the cassette presence / absence detection, the presence / absence of the additional paper feeding device, and the paper feeding operation, and only when the recording paper is fed from the additional paper feeding device. An opening of the first paper feed cassette and the second paper feed cassette of the additional paper feed device positioned above the additional paper feed device is opened.
上記構成により、画像形成装置本体機内騒音及び増設給紙装置機内騒音の外部への漏洩をより減少することが可能になり、また給紙動作時以外の機内騒音の外部への漏洩を大幅に抑えることが可能となる。   With the above configuration, it is possible to further reduce the external noise of the image forming apparatus main body noise and the additional paper feeding apparatus internal noise, and greatly suppress the external noise leakage outside the paper feeding operation. It becomes possible.
また給紙動作をさせようとする増設給紙装置より上方に位置する第2給紙カセットの少なくとも1つが増設給紙装置の所定の位置に無い、または第1給紙カセットが画像形成装置本体の所定の位置に無いと検知した場合に給紙動作を禁止することで、ガイド部材に案内されずに搬送される記録紙の先端へのダメージや、紙詰まり等の搬送不具合を確実に防止できる。   Further, at least one of the second paper feed cassettes located above the additional paper feeder to be fed is not in a predetermined position of the additional paper feeder, or the first paper cassette is in the image forming apparatus main body. By prohibiting the paper feeding operation when it is detected that it is not at the predetermined position, it is possible to reliably prevent damage to the leading edge of the recording paper conveyed without being guided by the guide member, and conveyance trouble such as paper jam.
以下に本発明の実施の形態を図に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.
(第1の実施の形態)
以下に本発明に係る画像形成装置の第1の実施の形態について説明する。
(First embodiment)
A first embodiment of an image forming apparatus according to the present invention will be described below.
図1は本発明の第1の実施の形態に係る画像形成装置の全体構成を示す断面図、図2は、本発明の第1の実施の形態に係る画像形成装置の画像形成装置本体と増設給紙装置との構成を示す斜視図、図3〜図5はそれぞれ本発明の第1の実施の形態に係る画像形成装置の画像形成装置本体と増設給紙装置との離間時の動作を示す動作説明図、装着途中の動作を示す動作説明図、装着後の構成図である。   FIG. 1 is a cross-sectional view showing an overall configuration of an image forming apparatus according to a first embodiment of the present invention, and FIG. 2 is an image forming apparatus main body and an extension of the image forming apparatus according to the first embodiment of the present invention. FIG. 3 to FIG. 5 show the operation of the image forming apparatus according to the first embodiment of the present invention when the image forming apparatus main body and the additional sheet feeding apparatus are separated from each other. It is operation | movement explanatory drawing, operation | movement explanatory drawing which shows the operation | movement in the middle of mounting | wearing, and the block diagram after mounting | wearing.
まず図1を元に本発明の第1の実施の形態の全体構成について説明する。   First, the overall configuration of the first embodiment of the present invention will be described with reference to FIG.
図1に示すとおり、画像形成装置本体1の下部に増設給紙装置2が装着されている。また前記画像形成装置本体1内の下部に記録紙S1を載置した給紙カセット10が、前記増設給紙装置2内に記録紙S2を載置した給紙カセット20が位置する。   As shown in FIG. 1, an additional sheet feeding device 2 is attached to the lower part of the image forming apparatus main body 1. In addition, the paper feed cassette 10 on which the recording paper S1 is placed is located in the lower part of the image forming apparatus main body 1, and the paper feed cassette 20 on which the recording paper S2 is placed in the additional paper feeding device 2.
前記給紙カセット10内には、記録紙S1が多数枚積載可能である中板101が支点を軸に回動可能で、コイルバネ102により給紙ローラ103方向へ押し上げられるように配置されている。また給紙ローラ103により複数枚同時に給紙された記録紙S1を一枚ずつに分離する分離パッド104、分離パッドを給紙ローラ103方向へ押圧する分離パッドバネ105を備える。また下方に位置する増設給紙装置から送られてくる記録紙S2を画像形成装置本体内部へ案内する搬送路110及び該搬送路110の開口部111と該開口部111を開閉可能にするシャッタ部材901、常に前記シャッタ部材を閉塞方向に附勢するバネ部材902を備える。   In the paper feed cassette 10, an intermediate plate 101 on which a large number of recording papers S1 can be stacked is rotatable about a fulcrum and is arranged to be pushed up by a coil spring 102 toward the paper feed roller 103. Further, a separation pad 104 for separating the recording sheets S1 fed simultaneously by the sheet feeding roller 103 one by one and a separation pad spring 105 for pressing the separation pad toward the sheet feeding roller 103 are provided. Further, a conveyance path 110 that guides the recording sheet S2 sent from the additional sheet feeding device located below to the inside of the image forming apparatus main body, and an opening 111 of the conveyance path 110 and a shutter member that can open and close the opening 111. 901 includes a spring member 902 that constantly urges the shutter member in the closing direction.
同様に前記増設給紙装置内に設置される前記給紙カセット20内には、記録紙S2が多数枚積載可能である中板201が支点を軸に回動可能で、コイルバネ202により給紙ローラ203方向へ押し上げられるように配置されている。また給紙ローラ203により複数枚同時に給紙された記録紙S2を一枚ずつに分離する分離パッド204、分離パッドを給紙ローラ203方向へ押圧する分離パッドバネ205を備える。また該増設給紙装置の下方に更に図示しない別の増設給紙装置を装着した際、該下部に設置した図示しない増設給紙装置から送られた記録紙を画像形成装置本体内部へ案内する搬送路210及び該搬送路210の開口部211と該開口部211を開閉可能にするシャッタ部材904、常に前記シャッタ部材904を閉塞方向に附勢するバネ部材905を備える。更に増設給紙装置2には上記給紙カセット20の中板201に載置されている記録紙S2を最上位の記録紙から順に送り出す給紙ローラ203、上記分離パッド204によって分離された記録紙S2もしくは図示しない下方に位置する別の増設給紙装置から送られた記録紙を上記画像形成装置本体1へ搬送する搬送ローラ対206、上記画像形成装置本体1の下部に該増設給紙装置2を装着する際、上記画像形成装置本体1の給紙カセット10に開閉可能に設置された上記シャッタ部材901の一部に接触し、該シャッタ部材901を開放方向に移動させる突起部903等を有する。   Similarly, in the sheet feeding cassette 20 installed in the additional sheet feeding device, a middle plate 201 on which a large number of recording sheets S2 can be stacked is rotatable about a fulcrum, and a sheet feeding roller is provided by a coil spring 202. It is arranged to be pushed up in the 203 direction. Further, a separation pad 204 for separating the recording sheets S2 fed simultaneously by the sheet feeding roller 203 one by one and a separation pad spring 205 for pressing the separation pad toward the sheet feeding roller 203 are provided. Further, when another additional paper feeding device (not shown) is further installed below the additional paper feeding device, conveyance for guiding the recording paper sent from the additional paper feeding device (not shown) installed in the lower part to the inside of the image forming apparatus main body. A path 210 and an opening 211 of the transport path 210, a shutter member 904 that can open and close the opening 211, and a spring member 905 that constantly biases the shutter member 904 in the closing direction are provided. Further, the additional sheet feeding device 2 includes a sheet feeding roller 203 that sequentially feeds the recording sheet S2 placed on the middle plate 201 of the sheet feeding cassette 20 from the uppermost recording sheet, and the recording sheet separated by the separation pad 204. A pair of conveying rollers 206 for conveying recording paper sent from S2 or another additional paper feeding device located below (not shown) to the image forming apparatus main body 1, and the additional paper feeding device 2 below the image forming apparatus main body 1. A projection 903 that contacts a part of the shutter member 901 that is installed in the paper feeding cassette 10 of the image forming apparatus main body 1 so as to be opened and closed, and moves the shutter member 901 in the opening direction. .
また画像形成装置本体1は、増設給紙装置2から送られてきた記録紙S2を給紙カセット10の中板101に載置されている記録紙S1を最上位の記録紙から順に送り出す上記給紙ローラ103、上記分離パッド104によって分離された記録紙S1もしくは増設給紙装置2より送り出された記録紙S2を搬送する搬送ローラ対106、さらに記録紙S1もしくは記録紙S2の搬送方向を変えるためにUターンさせる第1搬送路107、記録紙S1もしくは記録紙S2の斜行を矯正するレジストローラ対108、レーザー照射と記録紙搬送の同期をとるレジストセンサー109、手差マルチ給紙ユニット300、さらには、表面に感光層を形成する感光ドラム401、導電ローラからなる帯電ローラ402、現像ローラ403を有する現像手段、等の画像形成手段から成るプロセスユニット400、感光ドラム401へ画像データを変換したレーザー光を照射するレーザースキャナーユニット500、感光ドラム401上のトナー潜像を記録紙S1もしくは記録紙S2上に転写させる転写ローラ601、熱源を持つ加熱ユニット701と加圧ローラ702からなる定着ユニット700、転写後の記録紙S1もしくは転写後の記録紙S2を前記定着ユニット700へ搬送する搬送ベルト602、定着ユニット700から記録紙S1もしくは記録紙S2を装置本体外へ搬送・排出する搬送ローラ対801及び排紙ローラ対802、排出された記録紙S1もしくは記録紙S2を積載する排紙トレイ803等を有する。   The image forming apparatus main body 1 also feeds the recording paper S2 sent from the additional paper feeding device 2 in order from the uppermost recording paper on the recording paper S1 placed on the middle plate 101 of the paper feeding cassette 10. In order to change the conveyance direction of the recording roller S1 or the recording sheet S2, and the pair of conveying rollers 106 that convey the recording sheet S1 separated by the separation pad 104 or the recording sheet S2 sent out from the additional sheet feeding device 2. A first conveyance path 107 that makes a U-turn, a registration roller pair 108 that corrects the skew of the recording paper S1 or the recording paper S2, a registration sensor 109 that synchronizes laser irradiation and recording paper conveyance, a manual multi-feed unit 300, Furthermore, the image data is transferred to the photosensitive drum 401, a process unit 400 including image forming means such as a photosensitive drum 401 that forms a photosensitive layer on the surface, a charging roller 402 including a conductive roller, and a developing unit including a developing roller 403. Fixing consisting of a laser scanner unit 500 for irradiating the converted laser light, a transfer roller 601 for transferring the toner latent image on the photosensitive drum 401 onto the recording paper S1 or the recording paper S2, a heating unit 701 having a heat source, and a pressure roller 702 Unit 700, transport belt 602 that transports recording paper S1 after transfer or recording paper S2 after transfer to fixing unit 700, and transport rollers that transport and discharge recording paper S1 or recording paper S2 from fixing unit 700 to the outside of the apparatus main body. A pair 801, a discharge roller pair 802, a discharge tray 803 on which the discharged recording paper S1 or recording paper S2 is stacked, and the like.
次に本発明における画像形成装置の増設給紙装置からの給紙による動作説明をする。   Next, the operation of the image forming apparatus according to the present invention by feeding paper from the additional paper feeding apparatus will be described.
図示しないホストコンピュータから送られた画像信号により画像形成装置本体1に設けられたレーザースキャナーユニット500からレーザー光をあらかじめ帯電ローラ402により帯電された感光ドラム401上に照射することで感光ドラム表面に静電潜像を形成する。次いで現像ローラ403上のトナーにより感光ドラム401表面の静電潜像を現像し、トナー像を形成する。   The surface of the photosensitive drum is statically irradiated by irradiating a laser beam onto the photosensitive drum 401 that has been previously charged by the charging roller 402 from a laser scanner unit 500 provided in the image forming apparatus body 1 by an image signal sent from a host computer (not shown). An electrostatic latent image is formed. Next, the electrostatic latent image on the surface of the photosensitive drum 401 is developed with toner on the developing roller 403 to form a toner image.
一方、給紙カセット20内ではコイルバネ202の力で中板201に載置されている記録紙S2が給紙ローラ203に押圧されており、給紙ローラ203が図1において反時計回りに回転することにより、給紙ローラ203に当接した記録紙S2の上部付近数枚の記録紙S2'は、給紙ローラ203により送り出されると同時に、分離パッド204により給紙ローラ203に当接するシートS2'のみの1枚に分離され、突起903によりシャッタ901が開放された上方の給紙カセット10の開口部111から搬送路110へ搬送ローラ対206により搬送される。   On the other hand, in the paper feed cassette 20, the recording paper S2 placed on the intermediate plate 201 is pressed against the paper feed roller 203 by the force of the coil spring 202, and the paper feed roller 203 rotates counterclockwise in FIG. Thus, several recording sheets S2 ′ near the upper part of the recording sheet S2 in contact with the sheet feeding roller 203 are fed out by the sheet feeding roller 203 and at the same time the sheet S2 ′ in contact with the sheet feeding roller 203 by the separation pad 204. Only one sheet is separated, and is conveyed by the conveying roller pair 206 from the opening 111 of the upper sheet feeding cassette 10 in which the shutter 901 is opened by the protrusion 903 to the conveying path 110.
搬送ローラ対206によって搬送された記録紙S2'は更に画像形成装置本体1内の搬送ローラ対106により回転停止中のレジストローラ対108のニップに突き当たって所定のループが形成されることにより、斜行状態が矯正される。   The recording paper S2 ′ conveyed by the conveying roller pair 206 further strikes the nip of the registration roller pair 108 whose rotation is stopped by the conveying roller pair 106 in the image forming apparatus main body 1, thereby forming a predetermined loop. Line status is corrected.
斜行状態が矯正された記録紙S2'は、レジストローラ対108の搬送方向下流側に位置するレジストセンサー109を通過することで記録紙S2'の先端位置と露光光源であるレーザースキャナ500の発光タイミングを同期させ、感光ドラム401上のトナー像を記録紙S2'上の所定位置から画像の描き出し、転写ローラ601により記録紙S2'に転写され、搬送ベルト602を経て定着ユニット700で加熱・加圧されることにより永久固定画像となり、排紙ローラ対801、802によりトレイ803上に排紙、積載される。   The recording sheet S2 ′ whose skew state has been corrected passes through a registration sensor 109 positioned on the downstream side in the conveyance direction of the registration roller pair 108, thereby emitting light from the leading end position of the recording sheet S2 ′ and the laser light source 500 serving as an exposure light source. The timing is synchronized, and the toner image on the photosensitive drum 401 is drawn from a predetermined position on the recording sheet S2 ′, transferred to the recording sheet S2 ′ by the transfer roller 601, and heated / heated by the fixing unit 700 via the conveyance belt 602. By being pressed, a permanently fixed image is formed, and discharged and stacked on the tray 803 by a pair of discharge rollers 801 and 802.
次に図2〜図5を元に画像形成装置本体へ増設給紙装置を取り付ける際のシャッタ部材の動作説明を行う。尚、既に図1で示した部材については同じ記号を用い、説明は省略する。   Next, the operation of the shutter member when the additional sheet feeding device is attached to the image forming apparatus main body will be described with reference to FIGS. Note that the same symbols are used for members already shown in FIG. 1 and description thereof is omitted.
図2に示す通り、画像形成装置本体1の底面に設置された位置決め穴907に、それぞれ対応する増設給紙装置2の天面に設置された位置決めピン906の位置を合わせて挿入する。   As shown in FIG. 2, the positioning pins 906 installed on the top surface of the corresponding additional paper feeder 2 are inserted in the positioning holes 907 installed on the bottom surface of the image forming apparatus main body 1.
増設給紙装置2に設置した突起903に画像形成装置本体1の給紙カセット10に開閉自在に設置されているシャッタ901の一部が接触するまでシャッタ901は開口部111(図1参照)を閉鎖している。さらに位置決めピン906を画像形成装置本体下部の位置決め穴907に挿入すると突起903の斜面903aに沿ってシャッタ901が図4の矢印A方向に移動し、所定の位置まで完全に挿入されると図5に示す通りシャッタが完全に開放する。また同時に図示しない駆動及び電装コネクタも連結される。   The shutter 901 has an opening 111 (see FIG. 1) until a part of the shutter 901 that can be opened and closed in contact with the protrusion 903 installed on the additional paper feeder 2 contacts the paper feed cassette 10 of the image forming apparatus body 1. It is closed. Further, when the positioning pin 906 is inserted into the positioning hole 907 at the bottom of the image forming apparatus main body, the shutter 901 moves in the direction of arrow A in FIG. 4 along the inclined surface 903a of the projection 903, and when fully inserted to a predetermined position, FIG. The shutter opens completely as shown in FIG. At the same time, drive and electrical connectors (not shown) are also connected.
図5のように完全に画像形成装置本体1に増設給紙装置2が設置された後、給紙カセット10を矢印B方向へ引き抜く際、シャッタ901はバネ902により図6のように開口部111を閉鎖する方向へ移動する。また画像形成装置本体1外より給紙カセット10を矢印B方向と逆方向へ挿入した場合、シャッタ901の突起901aが増設給紙装置2の突起部903の面903bに当接し、シャッタ901が開口部111を開放する方向に押し広げられ図5の位置まで戻る。   After the additional sheet feeder 2 is completely installed in the image forming apparatus main body 1 as shown in FIG. 5, when the sheet cassette 10 is pulled out in the direction of arrow B, the shutter 901 is opened by the spring 902 as shown in FIG. Move in the direction of closing. When the paper feed cassette 10 is inserted from the outside of the image forming apparatus main body 1 in the direction opposite to the arrow B direction, the projection 901a of the shutter 901 comes into contact with the surface 903b of the projection 903 of the additional paper feed device 2, and the shutter 901 opens. The portion 111 is pushed open in the opening direction and returned to the position shown in FIG.
上記の通り画像形成装置本体1に増設給紙装置2を設置する際、自動的に画像形成装置本体の給紙カセット開口部は開放され、給紙動作に支障なく、最下段に設置した増設給紙装置の給紙カセット開口部は閉塞したままであるため機内騒音の底面開口部からの漏洩を防止でき、粉塵等から本体内部を保護可能となる。   As described above, when the additional paper feeding device 2 is installed in the image forming apparatus main body 1, the paper feeding cassette opening of the image forming apparatus main body is automatically opened, and there is no problem with the paper feeding operation. Since the paper feed cassette opening of the paper device remains closed, leakage of in-machine noise from the bottom opening can be prevented, and the inside of the main body can be protected from dust and the like.
ここでは増設給紙装置を1台のみ記載したが、2台以上の複数台を連結しても同様である。その場合際下段に設置された増設給紙装置の給紙カセットのみ開口部はシャッタにより閉塞される。   Here, only one additional sheet feeding device is described, but the same applies when two or more additional sheet feeders are connected. In that case, only the sheet feeding cassette of the additional sheet feeding apparatus installed in the lower stage is closed by the shutter.
またここでは画像形成装置としてレーザービームプリンタを例に説明したが、本発明はレーザープリンタに限定されるものではなく、一般的にシート部材を記録紙とし、画像形成装置本体に別の給紙装置が増設可能な画像形成装置全てに適用可能である。また画像形成方式としてはここで説明する電子写真方式以外にインク噴射方式、熱転写方式、ドットインパクト方式等でもよい。   In this embodiment, the laser beam printer is described as an example of the image forming apparatus. However, the present invention is not limited to the laser printer. Generally, a sheet member is used as a recording sheet, and another sheet feeding apparatus is provided in the main body of the image forming apparatus. Is applicable to all image forming apparatuses that can be expanded. In addition to the electrophotographic method described here, the image forming method may be an ink ejection method, a thermal transfer method, a dot impact method, or the like.
(第2の実施の形態)
以下に本発明に係る画像形成装置の第2の実施の形態について説明する。尚、ここでは第1の実施の形態との違いのみ述べることにし、その他は省略する。
(Second Embodiment)
The second embodiment of the image forming apparatus according to the present invention will be described below. Here, only the differences from the first embodiment will be described, and the others will be omitted.
図7a、図7bは、本発明の第2実施の形態に係る画像形成装置の構成及び動作を示す簡略図である。また図8(a)〜(c)は本発明に係る第2実施の形態の各動作時のフローチャートである。   7a and 7b are simplified diagrams showing the configuration and operation of the image forming apparatus according to the second embodiment of the present invention. FIGS. 8A to 8C are flowcharts at the time of each operation of the second embodiment according to the present invention.
前述の第1の実施の形態においてはシャッタの突起と増設給紙装置の突起の干渉により機械的にシャッタの開閉を行うが、本発明の第2の実施の形態に係る画像形成装置は、図7a、図7bに示す通り、給紙カセットのシャッタ908にラック形状908aを設け、増設給紙装置上面に前述のラック形状908aに噛み合うギヤ909を設置し、それらを図8に示すフローチャートに従って図示しないモータにより前記ギヤ909を直接的または間接的に矢印C方向に回転させることでシャッタ開放、矢印C方向と反対方向に回転させることでシャッタ閉塞動作を行う構成をとる。尚、図示しないが画像形成装置及び増設給紙装置には増設給紙装置設置の有無を検知する増設給紙装置検知手段と給紙カセットが給紙可能な位置に設置されているか否かを検知するカセット有無検知手段を有する。   In the first embodiment described above, the shutter is mechanically opened and closed by the interference between the protrusions of the shutter and the protrusions of the additional paper feeder. The image forming apparatus according to the second embodiment of the present invention is shown in FIG. 7a and 7b, a rack 908a is provided on the shutter 908 of the paper feed cassette, and a gear 909 that meshes with the rack shape 908a is provided on the upper surface of the additional paper feeder, and these are not shown in accordance with the flowchart shown in FIG. The motor 909 is configured to perform the shutter closing operation by rotating the gear 909 directly or indirectly in the direction of the arrow C and rotating the gear 909 in the direction opposite to the direction of the arrow C. Although not shown in the drawings, the image forming apparatus and the additional sheet feeding apparatus detect whether or not the additional sheet feeding apparatus detecting means for detecting whether the additional sheet feeding apparatus is installed and whether or not the sheet feeding cassette is installed at a position capable of feeding. A cassette presence / absence detecting means is provided.
次に各給紙カセットのシャッタ開閉動作処理及び給紙動作処理について図8のフローチャートを元に説明する。   Next, the shutter opening / closing operation processing and paper feeding operation processing of each paper feeding cassette will be described based on the flowchart of FIG.
画像形成装置本体1及び増設給紙装置2の各々について、前述の増設給紙装置検知手段が直下に増設給紙装置が無いと検知した場合、図7aのようにシャッタを閉じたままにし、直下に増設給紙装置が有ると検知し、尚且つ下方に位置する増設給紙装置より記録紙が給紙される場合にのみシャッタを開放し、下方に位置する増設給紙装置より記録紙が給紙されない場合にはシャッタを閉じたままにする。   For each of the image forming apparatus main body 1 and the additional paper feeder 2, when the above-described additional paper feeder detection means detects that there is no additional paper feeder, the shutter is kept closed as shown in FIG. Is opened and the shutter is opened only when the recording paper is fed from the lower additional paper feeding device, and the recording paper is fed from the lower additional paper feeding device. If not, keep the shutter closed.
以上のように必要なときにのみシャッタを開放することで、機内騒音の外部への漏洩を極力抑えることが可能となる。また粉塵等による機内への汚染も防止できる。   By opening the shutter only when necessary as described above, it is possible to suppress leakage of in-flight noise to the outside as much as possible. In addition, contamination inside the machine due to dust and the like can be prevented.
更に上記シャッタを開放した場合においても給紙カセットが所定の位置に有る場合のみ給紙動作を開始し、給紙カセットが所定の位置に無い場合は給紙動作を禁止する処理を行う。   Further, even when the shutter is opened, the paper feeding operation is started only when the paper feeding cassette is at a predetermined position, and when the paper feeding cassette is not at the predetermined position, the paper feeding operation is prohibited.
以上の動作処理により給紙カセットが所定の位置に無く、画像形成装置本体への搬送路が遮断されている場合や、搬送路が一部無い場合においても記録紙ダメージや紙詰まり等の不具合を未然に防ぐことができる。   Even if the paper feed cassette is not in a predetermined position and the conveyance path to the image forming apparatus main body is blocked by the above operation process, or when there is no conveyance path, problems such as recording paper damage and paper jams occur. It can be prevented in advance.
本発明の第1の実施の形態に係る画像形成装置の全体構成を示す断面図である。1 is a cross-sectional view showing an overall configuration of an image forming apparatus according to a first embodiment of the present invention. 本発明の第1の実施の形態に係る画像形成装置の画像形成装置本体と増設給紙装置との構成を示す斜視図である。FIG. 2 is a perspective view showing configurations of an image forming apparatus main body and an additional sheet feeding apparatus of the image forming apparatus according to the first embodiment of the present invention. 本発明の第1の実施の形態に係る画像形成装置の画像形成装置本体と増設給紙装置との離間時の動作を示す動作説明図である。FIG. 5 is an operation explanatory diagram illustrating an operation at the time of separation between the image forming apparatus main body and the additional sheet feeding device of the image forming apparatus according to the first embodiment of the present invention. 本発明の第1の実施の形態に係る画像形成装置の画像形成装置本体と増設給紙装置との装着途中の動作を示す動作説明図である。FIG. 5 is an operation explanatory diagram illustrating an operation in the middle of mounting of the image forming apparatus main body and the additional paper feeding apparatus of the image forming apparatus according to the first exemplary embodiment of the present invention. 本発明の第1の実施の形態に係る画像形成装置の増設給紙装置装着後の構成図である。1 is a configuration diagram of an image forming apparatus according to a first embodiment of the present invention after an additional sheet feeding device is mounted. FIG. 本発明の第1の実施の形態に係る画像形成装置の増設給紙装置装着後の給紙カセット動作説明図である。FIG. 6 is an operation explanatory diagram of a paper feeding cassette after the additional paper feeding device is installed in the image forming apparatus according to the first embodiment of the present invention. 本発明の第2実施の形態に係る画像形成装置の構成及び動作を示す簡略図である。It is a simplified diagram showing the configuration and operation of an image forming apparatus according to a second embodiment of the present invention. 本発明の第2の実施の形態に係る画像形成装置におけるフローチャートである。6 is a flowchart in an image forming apparatus according to a second embodiment of the present invention. 従来の画像形成装置の斜視構成図である。FIG. 10 is a perspective configuration diagram of a conventional image forming apparatus.
符号の説明Explanation of symbols
1 画像形成装置本体
2 増設給紙装置
S1、S2、S2' 記録紙
10、20 給紙カセット
103,203 給紙ローラ
108 レジストローラ対
300 手差マルチ給紙ユニット
400 プロセスユニット
500 レーザースキャナーユニット
700 定着ユニット
803 排紙トレイ
901、904、908 シャッタ部材
902、905 バネ部材
903 突起部
906 位置決めピン
907 位置決め穴
1 Image forming device
2 Additional paper feeder
S1, S2, S2 'chart paper
10, 20 Paper cassette
103,203 Feed roller
108 Registration roller pair
300 Manual multi-feed unit
400 process units
500 laser scanner unit
700 fusing unit
803 Output tray
901, 904, 908 Shutter member
902, 905 Spring member
903 Protrusion
906 Positioning pin
907 Positioning hole

Claims (6)

  1. 画像形成部と記録紙収納部を有する第1給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する画像形成装置本体と、該画像形成装置本体下部に1台または複数台着脱可能で、記録紙収納部を有する第2給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する増設給紙装置において、前記第1給紙カセット及び第2給紙カセットに、下部もしくは最下部に設置された前記増設給紙装置から給送された記録紙を上部に位置する前記画像形成装置本体へ搬送するためのガイド部である搬送路及び搬送路開口部を設けるとともに前記搬送路開口部を開閉可能なシャッタ部材を設け、前記画像形成装置本体に前記増設給紙装置が取り付けられていない場合は前記第1給紙カセットの開口部を閉じ、前記増設給紙装置の下部に別の増設給紙装置が取り付けられていない場合は前記第2給紙カセットの開口部を閉じ、前記画像形成装置本体に前記増設給紙装置が取り付けられると前記第1給紙カセットの開口部を開き、前記増設給紙装置の下部に別の増設給紙装置が取り付けられると前記第2給紙カセットの開口部を開く開閉機構を設けたことを特徴とする画像形成装置。   An image forming apparatus main body having a first paper feed cassette having an image forming unit and a recording paper storage unit, and a paper feed mechanism for separating and feeding the recording paper stored in the recording paper storage unit one by one, and the image formation One or a plurality of units can be attached to and detached from the lower part of the apparatus main body, and has a second paper feeding cassette having a recording paper storage unit and a paper feeding mechanism for separating and feeding the recording papers stored in the recording paper storage unit one by one. In the additional sheet feeder, the main body of the image forming apparatus in which the first sheet cassette and the second sheet cassette are positioned above the recording sheet fed from the additional sheet feeder installed at the lower or lower part. When a conveyance path and a conveyance path opening which are guide parts for conveying to the image forming apparatus are provided, a shutter member capable of opening and closing the conveyance path opening is provided, and the additional sheet feeding device is not attached to the image forming apparatus main body Is the first paper feed The opening of the set is closed, and when another additional paper feeder is not attached to the lower part of the additional paper feeder, the opening of the second paper cassette is closed, and the additional paper is supplied to the image forming apparatus main body. An opening / closing mechanism is provided that opens the opening of the first sheet cassette when the apparatus is attached and opens the opening of the second sheet cassette when another additional sheet feeder is attached to the lower part of the additional sheet feeder. An image forming apparatus.
  2. 前記開閉機構は前記シャッタ部材に設けられた突起形状と、下部に前記増設給紙装置装が取り付いていない場合にシャッタ部材を開口部閉塞方向へ附勢するバネ部材と、前記増設給紙装置に設けられた斜面を有する突起形状と、からなることを特徴とする請求項1に記載の画像形成装置。   The opening / closing mechanism includes a protrusion shape provided on the shutter member, a spring member that urges the shutter member in the direction of closing the opening when the additional paper feeding device is not attached to the lower portion, and the additional paper feeding device. The image forming apparatus according to claim 1, wherein the image forming apparatus comprises a protrusion shape having an inclined surface.
  3. 画像形成部と記録紙収納部を有する第1給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する画像形成装置本体と、該画像形成装置本体下部に1台または複数台着脱可能で、記録紙収納部を有する第2給紙カセットと該記録紙収納部に収納された記録紙を一枚ずつ分離給送する給紙機構とを有する増設給紙装置において、前記第1給紙カセット及び第2給紙カセットに、下部もしくは最下部に設置された前記増設給紙装置から給送された記録紙を上部に位置する前記画像形成装置本体へ搬送するためのガイド部である搬送路及び搬送路開口部を設けるとともに前記搬送路開口部を開閉可能なシャッタ部材を設け、前記増設給紙装置の前記画像形成装置本体への着脱を検知する検知手段と、前記給紙カセット1及び前記給紙カセット2の有無を検知する検知手段と、シャッタの開閉を行うシャッタ開閉機構及び開閉制御手段とを有することを特徴とする画像形成装置。   An image forming apparatus main body having a first paper feed cassette having an image forming unit and a recording paper storage unit, and a paper feed mechanism for separating and feeding the recording paper stored in the recording paper storage unit one by one, and the image formation One or a plurality of units can be attached to and detached from the lower part of the apparatus main body, and has a second paper feeding cassette having a recording paper storage unit and a paper feeding mechanism for separating and feeding the recording papers stored in the recording paper storage unit one by one. In the additional sheet feeder, the main body of the image forming apparatus in which the first sheet cassette and the second sheet cassette are positioned above the recording sheet fed from the additional sheet feeder installed at the lower or lower part. And a shutter member that can open and close the conveyance path opening is provided to detect attachment / detachment of the additional sheet feeding device to the image forming apparatus main body. Detecting means and the paper feed cover Detection means for detecting the presence or absence of Tsu sheet 1 and the sheet cassette 2, image forming apparatus and having a shutter opening and closing mechanism and the closing control means for opening and closing the shutter.
  4. 前記画像形成装置本体に前記増設給紙装置が取り付けられていない場合は前記第1給紙カセットの開口部を閉じ、前記増設給紙装置の下部に別の増設給紙装置が取り付けられていない場合は前記第2給紙カセットの開口部を閉じ、前記画像形成装置本体に前記増設給紙装置が取り付けられると前記第1給紙カセットの開口部を開き、前記増設給紙装置の下部に別の増設給紙装置が取り付けられると前記第2給紙カセットの開口部を開く、またいずれの場合も給紙カセットが所定の位置に無い場合はシャッタを閉じる制御を行うことを特徴とする請求項3に記載の画像形成装置。   When the additional paper feeder is not attached to the image forming apparatus main body, the opening of the first paper cassette is closed, and another additional paper feeder is not attached below the additional paper feeder Closes the opening of the second paper feeding cassette, opens the opening of the first paper feeding cassette when the additional paper feeding device is attached to the image forming apparatus main body, 4. An opening of the second sheet cassette is opened when an additional sheet feeder is attached, and control is performed to close the shutter when the sheet cassette is not in a predetermined position in any case. The image forming apparatus described in 1.
  5. 増設給紙装置から記録紙を給紙する際にのみ、画像形成装置の第1給紙カセット及び該増設給紙装置の上方に位置する増設給紙装置の第2給紙カセットの開口部を開放することを特徴とする請求項3に記載の画像形成装置。   Only when recording paper is fed from the additional paper feeder, the openings of the first paper cassette of the image forming device and the second paper cassette of the additional paper feeder located above the additional paper feeder are opened. The image forming apparatus according to claim 3.
  6. 給紙動作をさせようとする増設給紙装置より上方に位置する第2給紙カセットの少なくとも1つが増設給紙装置の所定の位置にない、または第1給紙カセットが画像形成装置本体の所定の位置にないと検知した場合に給紙動作を禁止することを特徴とする請求項3乃至請求項5のいずれか1項に画像形成装置。   At least one of the second paper feeding cassettes located above the additional paper feeding device to be fed is not in a predetermined position of the additional paper feeding device, or the first paper feeding cassette is a predetermined one of the image forming apparatus main body. 6. The image forming apparatus according to claim 3, wherein a sheet feeding operation is prohibited when it is detected that the position is not in the position.
JP2004239448A 2004-08-19 2004-08-19 Image forming device Withdrawn JP2006056657A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294561A (en) * 2008-06-09 2009-12-17 Ricoh Co Ltd Image forming apparatus, optional paper feeding device, and bottom plate member
CN106019879A (en) * 2015-03-30 2016-10-12 兄弟工业株式会社 Image forming apparatus and sheet supplying device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294561A (en) * 2008-06-09 2009-12-17 Ricoh Co Ltd Image forming apparatus, optional paper feeding device, and bottom plate member
CN106019879A (en) * 2015-03-30 2016-10-12 兄弟工业株式会社 Image forming apparatus and sheet supplying device
JP2016188909A (en) * 2015-03-30 2016-11-04 ブラザー工業株式会社 Image forming apparatus and sheet supply device

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