JP3539605B2 - Paper cassette - Google Patents

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JP3539605B2
JP3539605B2 JP07803796A JP7803796A JP3539605B2 JP 3539605 B2 JP3539605 B2 JP 3539605B2 JP 07803796 A JP07803796 A JP 07803796A JP 7803796 A JP7803796 A JP 7803796A JP 3539605 B2 JP3539605 B2 JP 3539605B2
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JPH09267941A (en
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寿久 中村
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Ricoh Co Ltd
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Ricoh Co Ltd
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Description

【0001】
【産業上の利用分野】
本願発明は、複写機、レーザプリンタ、ファクシミリ等の画像形成装置に装着して、用紙を分離爪にて一枚毎分離し供給する給紙カセットに関する。
【0002】
【従来の技術】
図8は画像形成装置に装着された給紙カセットの概要を示す構成図である。
1は用紙が装填される給紙カセット、2は用紙Pが載置される底板、3は前記用紙の搬送方向前端部コーナに掛止する分離爪、4は分離爪の上流側に位置して前記用紙を一枚毎給送する給紙コロ、5は前記分離爪を支持する支軸、6は底板2の揺動端を上方に付勢するスプリング、7は底板2の揺動支点である支点軸である。
尚、給紙カセット1の紙幅方向には用紙の幅方向を規正する図示しないサイドフェンスが備えられている。
【0003】
このような構成において、給紙カセット1に装填された用紙Pは、底板2を介して付勢手段であるスプリング6によって搬送方向前端部が上方に付勢され、その上方に付勢された用紙Pの搬送方向前端部コーナを分離爪3の爪部3aが掛止する。この状態で給紙コロ4を矢印方向に回転させることにより、用紙が搬送方向に押し出され爪部3aの掛止によって用紙Pは湾曲する。このとき給紙コロ4と用紙Pとの摩擦力が用紙P間の摩擦力よりも大きいため、最上部の用紙Pが最も湾曲して爪部3aを乗り越えて搬送されていく。このように分離爪3の爪部3aが用紙Pの搬送方向前端部コーナを適正に覆うことで、用紙Pが分離され給紙されていく。
【0004】
給紙カセット1は、一般的に単サイズの用紙のみを装填するものと、複数種サイズの異なったものを装填可能とするものがあり、いずれも用紙の装填、補充がある。また複数種サイズの装填が可能なものは頻繁に用紙サイズの入れ替えが行われ、その都度、用紙サイズの幅方向に合わせてサイドフェンスを移動させている。このときサイドフェンスに備えられている分離爪もサイドフェンスに伴って移動する。このサイドフェンスの移動はユーザが行うようになっており、その作業者によっては、サイドフェンスを用紙幅方向端に突き当てる度合いが異なり、サイドフェンスと用紙端部との間に隙間が生じるようなことも度々生じる。したがってサイドフェンスに備えられている分離爪の爪部3aが、用紙Pの搬送方向前端部コーナを適切に覆わず、用紙分離時には用紙の不送りあるいは重送という問題を起こしていた。
【0005】
本発明は、給紙カセットに装填する用紙幅に対応して移動させる分離爪の位置設定を、的確に指示できるようにして用紙の分離不能、不送り、重送等を防止する給紙カセットを提供するのを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために請求項1に係る発明では、分離爪の用紙の搬送方向前端部コーナを覆う部分に、該用紙を覆う適正範囲を表示したことを特徴とする。
【0007】
また請求項2に係る発明では、用紙の側端部を規正するサイドフェンスと、このサイドフェンスに支持される分離爪とを備えるとともに、前記分離爪の前記用紙の搬送方向前端部コーナを覆う部分に、該用紙を覆う適正範囲を示す部材を設けたことを特徴とする。
【0008】
また請求項3に係る発明では、用紙の側端部を規正するサイドフェンスと、このサイドフェンスに支持される分離爪とを備えるとともに、前記分離爪の前記用紙の搬送方向前端部コーナを覆う部分に、前記用紙を覆う適正範囲を示す印を付けたことを特徴とする。
【0009】
また請求項4に係る発明では、用紙の一方の側端部を規正する第1サイドフェンスと、他方の側端部を規正する第2サイドフェンスと、第1サイドフェンスに支持される第1分離爪と、第2サイドフェンスに支持される第2分離爪と、前記第1または第2分離爪の一方に用紙の搬送方向前端部コーナを覆う部分に、前記用紙を覆う適正範囲を示す部材を設け、前記第1または第2分離爪の他方に前記用紙を覆う適正範囲を示す印を付けたことを特徴とする。
【0010】
また請求項5に係る発明では、前記分離爪に示す前記適正範囲を、該分離爪本体とは異なる色にしたことを特徴とする。
【0011】
【作用】
請求項1記載の構成によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を表示したので、用紙を装填するとき、補充するときあるいはサイズの異なる用紙を装填するときに移動させるサイドフェンスを一旦移動し分離爪の位置が変位しても、分離爪の用紙の搬送方向前端部コーナを覆う部分の適切な位置を認識できるとともに、分離爪位置を適切にセットができる。
【0012】
また請求項2記載の構成によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す部材を設けたので、用紙を装着するとき、補充するときあるいはサイズの異なる用紙を装着するときに、サイドフェンスに備えられている分離爪の位置が変わっても、分離爪の用紙の搬送方向前端部コーナを覆う部分の適切な位置を認識でき、かつ適切な分離爪位置をセットできる。
【0013】
また請求項3記載の構成によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示すラインを形成させたので、用紙を装填するとき、補充するときあるいはサイズの異なる用紙を装填するときに、サイドフェンスに備えられている分離爪の位置が変わっても、分離爪の用紙の搬送方向前端部コーナを覆う部分の適切な位置を認識でき、かつ適切な分離爪位置をセットできる。
【0014】
また請求項4記載の構成によれば、分離爪の一方に、分離爪の用紙の搬送方向前端部コーナを覆う部分にその適正範囲を示す部材を設け、他方に分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す印を形成させたので、一方と他方の分離爪の重量が異なる場合、あるいは一方と他方の分離爪の形状が異なる場合に、前記適正範囲を示す部材を軽い分離爪に設けて分離爪の重量を同一にすることができる。よって双方の分離爪の重量バランスがとれ、バランスの悪い場合に生じる用紙スキューを防止できる。
【0015】
また請求項5記載の構成によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す部分である部材あるいは印を分離爪と異なる色にしたので、用紙を装填するとき補充するときあるいはサイズの異なる用紙を装填するときに、サイドフェンスに備えられている分離爪の位置が変わっても、分離爪の用紙の搬送方向前端部コーナを覆う部分の適切な位置を認識でき、かつ適切な分離爪位置をセットできる。
【0016】
【実施例】
本願発明の実施例について説明する。なお、図8に示した従来の構成における部材と同一の部材に対しては同一の符号を付して詳細な説明は省略する。
【0017】
図1は、本願発明の実施例に係る給紙カセットの平面図を示したものである。図において、可動側分離爪8は、装填する用紙幅に応じて可動する可動サイドフェンス10側に、固定側分離爪9は給紙カセット1′の固定サイドフェンス11側に備えられているもので、各分離爪とも底板2に装填された用紙を一枚毎分離する爪部8a,9aを有している。また可動側分離爪8及び固定側分離爪9は、各側部である可動サイドフェンス10と固定サイドフェンス11に設けられている支軸5a,5bに回動自在に支持されている。またガイド溝12は可動サイドフェンス10を用紙幅方向に案内するもので、エンドフェンス13は用紙の長さ方向を規正しているものである。スライド溝14はエンドフェンス13を用紙搬送方向に移動させる案内溝である。
【0018】
このような給紙カセット1′において、いままで使用していた用紙幅とは異なる用紙幅を装填する必要が生じた場合には、装填する用紙幅に応じて可動サイドフェンス10を用紙幅方向に移動させて広げるかあるいは狭めるかして一旦仮位置まで移動させ、固定サイドフェンス11と可動サイドフェンス10との間に用紙を装填した後、可動サイドフェンス10を用紙幅端に突き当て、その突き当たったところで固定する。そのときエンドフェンス13も用紙の後端側を規正するため必要に応じて移動させる。
【0019】
図2は本願発明の第1及び第2実施例に係る分離爪の斜視図を示したものである。図2(a)は可動サイドフェンス10に備えられる可動側分離爪8の構成を示したもので、この可動側分離爪8の一端側には用紙の搬送方向前端部コーナを覆う爪部8aが形成され、他端側には、可動サイドフェンス10の支軸5aに支持される孔部8bが形成されている。また爪部8aの上部には用紙のコーナを覆う適正範囲を示す第1部材15が備えられている。また図2(b)は固定サイドフェンス11に備えられる固定側分離爪9の構成を示したもので、この固定側分離爪9の一端側には用紙の搬送方向前端部コーナを覆う爪部9aが形成され、他端側には固定サイドフェンス11の支軸5bに支持される孔部9bが形成されている。また爪部9aの上部には用紙のコーナを覆う適正範囲を示す第2部材16が備えられている。
この可動側分離爪8及び固定側分離爪9は一対で給紙カセット1に備えられ各可動サイドフェンス10及び固定サイドフェンス11に支持されている。また各爪部8a,9aの内側は分離爪自体の荷重で用紙上面に当接している。この荷重は最上位用紙が爪部を乗り越えるに必要な重さに予め設定され、用紙が分離し易いようになっている。従って爪部8a,9aの用紙の搬送方向前端部コーナを覆う位置が適正でないと分離性能に影響し、分離不能、用紙スキューが生じることになる。そのため適正位置を指示する第1部材15が爪部8aの上部に、また第2部材16が爪部9aの上部に設けられ、前記コーナを覆う爪部8a及び9aが適正範囲内かどうか目視することができる。このときに適正範囲から外れている場合は、可動サイドフェンス10を移動させて爪部8a及び9aの位置を矯正する。
【0020】
図3は本願発明の第3実施例に係る分離爪の斜視図を示したものである。図3(a)は可動サイドフェンス10に備えられる可動側分離爪20の構成を示したもので、この可動側分離爪20の一端側には用紙の搬送方向前端部コーナを覆う爪部20aが形成され、他端側には、可動サイドフェンス10の支軸5aに支持される孔部20bが形成されている。また爪部20aの上部には用紙の前記コーナを覆う適正範囲を示す印であるLライン17が付されている。また図3(b)は固定サイドフェンス11に備えられる固定側分離爪21の構成を示したもので、この固定側分離爪21の一端側には用紙の搬送方向前端部コーナを覆う爪部21aが形成され、他端側には固定サイドフェンス11の支軸5bに支持される孔部21bが形成されている。また爪部21aの上部には前記コーナを覆う適正範囲を示す印であるMライン18が付されている。この適正範囲を示すLライン17及びMライン18は、爪部20a及び21aが前記コーナを覆うときの適正範囲内にあるかどうかを示すもので、目視で容易に確認できるようになっている。従って適正範囲から外れている場合は、可動サイドフェンス10を移動させて爪部20a及び21aの位置を矯正する。
【0021】
図4は本願発明の第4実施例に係る分離爪の部分図を示したものである。図は用紙の搬送方向前端部コーナとそのコーナを覆う爪部8a及び爪部21aを示している。また爪部8aの上部には前記コーナを覆うための適正範囲を示す第1部材15が備えられ、爪部21aの上部には前記コーナを覆うための適正範囲を示すMライン18が印されている。図中のAは爪部8a,21aが前記コーナを覆うときの適正領域を示したものである。
このように第1部材15を備えた爪部8aとMライン18を付した爪部21aを一対で用いることにより、左右の分離爪自体の形状が異なる場合あるいは分離爪の支点位置が異なる場合に、いずれか用紙上面にかかる面積当たりの荷重の軽い方に第1部材15を爪部に備えて、爪部8a,21aの用紙にかかる荷重差を調整することができる。よって左右の分離爪の分離性能に差がなくなり、用紙を分離するタイミングのズレ、ひっかかり等が防止できる。
【0022】
図5は本願発明の第4実施例に係る分離爪圧と分離爪の用紙の搬送方向前端部コーナを覆う量との関係を示した図である。この図では、適正領域Bで示す範囲が分離爪圧とそれに対応した分離爪の前記コーナを覆う量の適正関係を示している。したがって分離爪圧が重い場合には分離爪の前記コーナを覆う領域が、分離爪圧が軽いものより少ない領域になり、用紙に対する面積当たりの荷重バランスをとるようにしている。したがって一対の分離爪において、分離爪自体の重さが異なるような場合、用紙を覆う爪部の形状が異なる場合には、適正領域Bに入るように分離圧あるいは用紙を覆う領域を調整すればバランスが保持できる。また図において重送領域Cは分離爪による用紙押圧の荷重が面積当たり所定荷重より低下する領域で、頻繁に用紙が重送し分離不能を生じさせる範囲である。また不送り領域Dは分離爪による用紙押圧の荷重が面積当たりの所定荷重より高い領域で、頻繁に用紙が不送りし分離が不能になる領域である。この場合には用紙のジャムが生じ用紙が詰まる状態になる。
【0023】
図6及び7は本願発明の第5実施例に係る分離爪を示した図である。可動側分離爪30は、その爪部30aの上部に彩色部材31を備えている。この彩色部材31は可動側分離爪30本体とは異なる色になっており、彩色部材31の位置が明確に識別できるようになっている。また可動側分離爪32はその爪部32aの上部に彩色印である彩色ライン33を形成し、この彩色ライン33は可動側分離爪32本体とは異なる色になっており、彩色ライン33の位置が明確に識別できるようになっている。このようにすることで爪部30aあるいは爪部32aに用紙の搬送方向前端部コーナを覆う適正な領域を容易に確認でき、分離爪の位置設定ができる。
尚、上記の実施例は可動側分離爪に彩色部材あるいは彩色印を設けたが、これを固定側分離爪に設けてもよい。また彩色部材31及び彩色ライン33とも分離爪本体、さらには用紙と異なっている色であれば何色でもよい。
【0024】
【発明の効果】
以上説明したように、請求項1に係る発明によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分にその適正範囲を表示したことにより、給紙カセットのサイドフェンスを移動するような異なる用紙幅を入れ替えする場合に、適切に分離爪を用紙コーナを覆う部分に目視位置させることができる。よって用紙の分離不能である不送り、重送等が防止できる。さらに紙ジャム、紙詰まりの原因を調査し易くできるとともにメンテ効率の向上が図れる。
【0025】
また請求項2に係る発明によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す部材を設けたことにより、上記請求項1の効果と同様な効果が得られる。
【0026】
また請求項3に係る発明によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す印を付したことにより、、上記請求項1の効果の他に、爪部に印を付すことのみであるため、適正範囲を表示する専用の部材は必要なく、したがって部品の削減とコスト低減が図れる。
【0027】
また請求項4に係る発明によれば、分離爪の一方に、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す部材を設け、他方に用紙コーナを覆う部分に、その適正範囲を示す印を付したことにより、一対の分離爪間において形状、支点が異なるものでも簡単に荷重のバランスが得られる。よってスキューしない用紙分離が得られ、かつ不送り、重送のない分離性能が得られる。
【0028】
請求項5に係る発明によれば、分離爪の用紙の搬送方向前端部コーナを覆う部分に、その適正範囲を示す部材あるいは印を分離爪と異なる色にしたことにより、給紙カセットのサイドフェンスを移動して異なる用紙幅を入れ替えする場合に、適切に分離爪の前記コーナを覆う部分を色識別で目視でき、適切に位置セットさせることができる。よって用紙の分離不能である不送り、重送等が防止できる。さらに紙ジャム、紙詰まりの原因を調査し易くできるとともにメンテ効率の向上も図れる。
【図面の簡単な説明】
【図1】本願発明の実施例に係る給紙カセットの平面図を示す。
【図2】本願発明の第1及び第2実施例に係る分離爪の斜視図を示す。
【図3】本願発明の第3実施例に係る分離爪の斜視図を示す。
【図4】本願発明の第4実施例に係る分離爪の部分図を示す。
【図5】本願発明の第4実施例に係る分離爪圧と分離爪の用紙の搬送方向前端部コーナを覆う量との関係図を示す。
【図6】本願発明の第5実施例に係る分離爪を示した斜視図を示す。
【図7】本願発明の第5実施例に係る他の分離爪を示した斜視図を示す。
【図8】従来の給紙カセットの構成図を示す。
【符号の説明】
1,1′…給紙カセット
2…底板
3…分離爪
3a…爪部
4…給紙コロ
5a,5b…支軸
6…スプリング
7…支点軸
8,20,30,32…可動側分離爪
8a,9a,20a,21a,30a,32a…爪部
8b,9b,20b,21b,30b,32b…孔部
9,21…固定側分離爪
10…可動サイドフェンス
11…固定サイドフェンス
12…ガイド溝
13…エンドフェンス
14…スライド溝
15…第1部材
16…第2部材
17…Lライン
18…Mライン
31…彩色部材
33…彩色ライン
[0001]
[Industrial applications]
The present invention relates to a paper feed cassette which is mounted on an image forming apparatus such as a copying machine, a laser printer, a facsimile or the like, and separates and feeds sheets one by one with separation claws.
[0002]
[Prior art]
FIG. 8 is a configuration diagram illustrating an outline of a sheet feeding cassette mounted on the image forming apparatus.
1 is a paper feed cassette in which paper is loaded, 2 is a bottom plate on which the paper P is placed, 3 is a separation claw that is hooked at a front end corner in the sheet conveyance direction, and 4 is an upstream position of the separation claw. A paper feed roller for feeding the paper sheet by sheet, 5 is a support shaft for supporting the separation claw, 6 is a spring for urging the swing end of the bottom plate 2 upward, and 7 is a swing fulcrum of the bottom plate 2. It is a fulcrum axis.
Note that a side fence (not shown) that regulates the width direction of the paper is provided in the paper width direction of the paper feed cassette 1.
[0003]
In such a configuration, the paper P loaded in the paper feed cassette 1 is biased upward at the front end in the transport direction by a spring 6 serving as biasing means via the bottom plate 2, and the paper biased upward is urged upward. The claw portion 3a of the separation claw 3 hooks the front end corner of the P in the conveying direction. By rotating the paper feed roller 4 in the direction of the arrow in this state, the paper is pushed out in the transport direction, and the paper P is curved by the hook of the claw 3a. At this time, since the frictional force between the paper feed roller 4 and the paper P is larger than the frictional force between the papers P, the uppermost paper P is curved most and is conveyed over the claw 3a. Thus, the paper P is separated and fed by the claw portion 3a of the separation claw 3 appropriately covering the front end corner in the transport direction of the paper P.
[0004]
The paper feed cassette 1 generally includes a type in which only a single-size sheet is loaded, and a type in which a plurality of types of different sizes can be loaded. In the case where a plurality of sizes can be loaded, the paper size is frequently changed, and each time the side fence is moved in the width direction of the paper size. At this time, the separation claw provided on the side fence also moves with the side fence. The movement of the side fence is performed by the user, and depending on the operator, the degree to which the side fence abuts on the edge of the paper width direction is different, and a gap is generated between the side fence and the edge of the paper. Things often happen. Therefore, the claw portion 3a of the separation claw provided on the side fence does not appropriately cover the front end corner of the sheet P in the transport direction, and there has been a problem that the sheet is not fed or multi-fed when the sheet is separated.
[0005]
The present invention is directed to a paper feed cassette that can accurately instruct the position setting of a separation claw to be moved corresponding to the width of paper loaded in the paper feed cassette, thereby preventing paper separation, non-feed, double feed, and the like. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that an appropriate range for covering the sheet is displayed on a portion of the separation claw covering a front end corner of the sheet in the conveying direction.
[0007]
In the invention according to claim 2, a side fence for regulating a side end of the sheet, a separation claw supported by the side fence, and a portion of the separation claw covering a front end corner in the sheet conveyance direction of the sheet are provided. A member indicating an appropriate range for covering the sheet is provided.
[0008]
Further, in the invention according to claim 3, a side fence for regulating a side end of the sheet, a separation claw supported by the side fence, and a portion of the separation claw covering a front end corner of the sheet in the sheet conveyance direction. A mark indicating an appropriate range for covering the sheet.
[0009]
In the invention according to claim 4, the first side fence for regulating one side end of the sheet, the second side fence for regulating the other side end, and the first separation fence supported by the first side fence. A claw, a second separation claw supported by a second side fence, and a member indicating an appropriate range for covering the sheet at a portion covering one of the first and second separation claws at a front end corner in the sheet conveyance direction. And a mark indicating an appropriate range for covering the sheet is attached to the other of the first and second separation claws.
[0010]
The invention according to claim 5 is characterized in that the appropriate range shown on the separation claw is a different color from that of the separation claw body.
[0011]
[Action]
According to the first aspect of the present invention, the appropriate range is displayed on the portion of the separation claw covering the front end corner of the sheet in the transport direction, so that the sheet is loaded, replenished, or sheets of different sizes are loaded. Even if the side fence to be moved is once moved and the position of the separation claw is displaced, the proper position of the portion where the separation claw covers the front end corner in the paper transport direction can be recognized, and the separation claw position can be set appropriately. it can.
[0012]
According to the second aspect of the present invention, a member indicating an appropriate range is provided at a portion of the separation claw covering the front end corner of the sheet in the transport direction of the sheet, so that the sheet is loaded, refilled, or different in size. When the paper is loaded, even if the position of the separation claw provided on the side fence changes, the appropriate position of the portion of the separation claw that covers the front end corner in the paper transport direction can be recognized, and the proper separation claw position Can be set.
[0013]
According to the third aspect of the present invention, a line indicating an appropriate range is formed in a portion of the separation claw covering the front end corner of the sheet in the transport direction of the sheet, so that the sheet is loaded, refilled, or resized. When loading different sheets, even if the position of the separation claw provided on the side fence changes, it is possible to recognize the appropriate position of the portion of the separation claw that covers the front end corner of the sheet in the transport direction of the sheet, and to appropriately set the separation claw. You can set the position.
[0014]
According to the configuration of the fourth aspect, one of the separation claws is provided with a member indicating an appropriate range in a portion covering the front end portion of the separation claw in the sheet conveyance direction, and the other end is provided with a separation claw front end in the sheet conveyance direction. Since a mark indicating the proper range is formed on the portion covering the corner, the proper range is indicated when the weight of one and the other separating claws is different, or when the shape of the one and the other separating claw is different. The member can be provided on a light separation claw to make the separation claw the same weight. Therefore, the weight of both separation claws is balanced, and paper skew that occurs when the balance is poor can be prevented.
[0015]
Further, according to the configuration of the fifth aspect, the portion or mark which is the portion indicating the proper range is colored in a different color from the separation claw on the portion of the separation claw covering the front end corner of the sheet in the sheet conveyance direction. When refilling or loading paper of different sizes, even if the position of the separation claw provided on the side fence changes, the appropriate position of the part where the separation claw covers the front end corner in the paper conveyance direction is changed. It can be recognized and an appropriate separation claw position can be set.
[0016]
【Example】
An embodiment of the present invention will be described. The same members as those in the conventional configuration shown in FIG. 8 are denoted by the same reference numerals, and detailed description is omitted.
[0017]
FIG. 1 is a plan view of a paper feed cassette according to an embodiment of the present invention. In the figure, the movable separation claw 8 is provided on the side of the movable side fence 10 which is movable in accordance with the width of the sheet to be loaded, and the fixed separation claw 9 is provided on the side of the fixed side fence 11 of the sheet cassette 1 '. Each of the separation claws has claw portions 8a and 9a for separating the sheets loaded on the bottom plate 2 one by one. The movable separation claw 8 and the fixed separation claw 9 are rotatably supported by support shafts 5a and 5b provided on a movable side fence 10 and a fixed side fence 11, which are the respective side portions. The guide groove 12 guides the movable side fence 10 in the sheet width direction, and the end fence 13 regulates the sheet length direction. The slide groove 14 is a guide groove for moving the end fence 13 in the paper transport direction.
[0018]
When it is necessary to load a sheet width different from the sheet width used so far in such a sheet feeding cassette 1 ', the movable side fence 10 is moved in the sheet width direction according to the sheet width to be loaded. After moving the sheet to a temporary position by moving or expanding or narrowing the sheet, the sheet is loaded between the fixed side fence 11 and the movable side fence 10, and then the movable side fence 10 is abutted against the sheet width edge, and the abutment is made. And fix it there. At this time, the end fence 13 is also moved as necessary to regulate the rear end side of the sheet.
[0019]
FIG. 2 is a perspective view of the separation claw according to the first and second embodiments of the present invention. FIG. 2A shows the configuration of the movable separation claw 8 provided on the movable side fence 10. A claw 8 a that covers a front end portion in the sheet conveying direction is provided at one end of the movable separation claw 8. At the other end, a hole 8b is formed on the support shaft 5a of the movable side fence 10. Further, a first member 15 indicating an appropriate range for covering the corner of the sheet is provided above the claw portion 8a. FIG. 2B shows a configuration of the fixed side separation claw 9 provided on the fixed side fence 11, and a claw portion 9a that covers a front end portion in the sheet conveyance direction at one end of the fixed side separation claw 9 is shown. And a hole 9b supported by the support shaft 5b of the fixed side fence 11 is formed on the other end side. In addition, a second member 16 indicating an appropriate range for covering the corner of the sheet is provided above the claw 9a.
The movable separation claw 8 and the fixed side separation claw 9 are provided as a pair in the sheet cassette 1 and supported by the movable side fence 10 and the fixed side fence 11. The inside of each claw portion 8a, 9a is in contact with the upper surface of the sheet by the load of the separation claw itself. This load is set in advance to a weight necessary for the uppermost sheet to get over the claw portion, so that the sheet is easily separated. Therefore, if the positions of the claws 8a and 9a which cover the front end corners of the sheet in the transport direction of the sheet are not appropriate, the separation performance is affected, and separation is impossible and sheet skew occurs. Therefore, the first member 15 for indicating a proper position is provided above the claw portion 8a, and the second member 16 is provided above the claw portion 9a, and it is visually checked whether the claw portions 8a and 9a covering the corner are within the proper range. be able to. At this time, if it is out of the appropriate range, the movable side fence 10 is moved to correct the positions of the claws 8a and 9a.
[0020]
FIG. 3 is a perspective view of a separation claw according to a third embodiment of the present invention. FIG. 3A shows the configuration of the movable side separation claw 20 provided on the movable side fence 10, and a claw portion 20 a that covers a front end portion in the sheet conveying direction is provided at one end of the movable side separation claw 20. A hole 20b is formed on the other end side and supported by the support shaft 5a of the movable side fence 10. Further, an L line 17 which is a mark indicating an appropriate range for covering the corner of the sheet is provided above the claw portion 20a. FIG. 3B shows the configuration of the fixed side separation claw 21 provided on the fixed side fence 11. The fixed side separation claw 21 has a claw portion 21a on one end side for covering a front end corner in the sheet conveyance direction. Is formed at the other end, and a hole 21b supported by the support shaft 5b of the fixed side fence 11 is formed. Further, an M line 18 which is a mark indicating an appropriate range for covering the corner is provided on an upper portion of the claw portion 21a. The L line 17 and the M line 18 indicating the appropriate range indicate whether or not the claw portions 20a and 21a are within the appropriate range when covering the corner, and can be easily confirmed visually. Therefore, when the position is out of the appropriate range, the movable side fence 10 is moved to correct the positions of the claw portions 20a and 21a.
[0021]
FIG. 4 is a partial view of a separation claw according to a fourth embodiment of the present invention. The drawing shows a front end corner in the sheet conveying direction, and a claw portion 8a and a claw portion 21a that cover the corner. A first member 15 indicating an appropriate range for covering the corner is provided above the claw portion 8a, and an M line 18 indicating an appropriate range for covering the corner is marked above the claw portion 21a. I have. A in the figure shows an appropriate area when the claw portions 8a and 21a cover the corners.
By using a pair of the claw 8a provided with the first member 15 and the claw 21a provided with the M line 18 as described above, when the shapes of the left and right separation claws themselves are different or the fulcrum positions of the separation claws are different. By providing the first member 15 on the claw portion on the side of the lighter load per unit area applied to the upper surface of the sheet, the load difference between the claw portions 8a and 21a applied to the sheet can be adjusted. Therefore, there is no difference in the separation performance of the left and right separation claws, and it is possible to prevent the timing of separating the paper and the occurrence of the slippage.
[0022]
FIG. 5 is a diagram showing the relationship between the separation claw pressure and the amount of the separation claw covering the front end corner in the sheet conveyance direction according to the fourth embodiment of the present invention. In this figure, the range indicated by the appropriate area B indicates the appropriate relationship between the separation claw pressure and the corresponding amount of the separation claw covering the corner. Therefore, when the separation claw pressure is high, the area of the separation claw that covers the corner is smaller than the area where the separation claw pressure is light, so that the load per sheet area is balanced. Therefore, when the weight of the separation claw itself is different between the pair of separation claws, and when the shape of the claw portion covering the paper is different, if the separation pressure or the area covering the paper is adjusted so as to enter the appropriate area B, Balance can be maintained. In the drawing, a double feeding area C is an area where the load of pressing the sheet by the separation claw is lower than a predetermined load per area, and is a range in which sheets are frequently fed and separation becomes impossible. The non-feed area D is an area where the load of pressing the sheet by the separation claw is higher than a predetermined load per area, and the sheet is frequently not fed and cannot be separated. In this case, a paper jam occurs and the paper is jammed.
[0023]
6 and 7 are views showing a separation claw according to a fifth embodiment of the present invention. The movable separation claw 30 includes a coloring member 31 above the claw portion 30a. The coloring member 31 has a color different from that of the movable side separation claw 30 main body, so that the position of the coloring member 31 can be clearly identified. The movable separation claw 32 forms a coloring line 33 as a coloring mark on the upper portion of the claw portion 32a, and the coloring line 33 has a different color from the movable separation claw 32 main body. Can be clearly identified. This makes it possible to easily confirm an appropriate area for covering the front end corner in the sheet conveying direction on the claw portion 30a or the claw portion 32a, and to set the position of the separation claw.
In the above-described embodiment, the coloring member or the coloring mark is provided on the movable-side separation claw, but this may be provided on the fixed-side separation claw. The coloring member 31 and the coloring line 33 may be of any color as long as the color is different from that of the separation claw body and the paper.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the appropriate range is displayed on the portion of the separation claw covering the front end corner in the sheet conveyance direction, so that the side fence of the sheet cassette is moved. When replacing different paper widths, the separation claw can be appropriately positioned visually at a portion covering the paper corner. Therefore, non-separation, double feeding, etc., in which the paper cannot be separated, can be prevented. Further, the cause of paper jam and paper jam can be easily investigated, and the maintenance efficiency can be improved.
[0025]
According to the second aspect of the present invention, the same effect as that of the first aspect is obtained by providing a member indicating an appropriate range in a portion of the separation claw covering the front end corner in the sheet conveying direction. Can be
[0026]
According to the third aspect of the present invention, a mark indicating an appropriate range is provided on a portion of the separation claw covering the front end corner in the sheet conveying direction, so that the claw is provided in addition to the effect of the first aspect. Since only a part is marked, a dedicated member for displaying an appropriate range is not required, and therefore the number of parts and the cost can be reduced.
[0027]
Further, according to the invention according to claim 4, one of the separation claws is provided with a member indicating an appropriate range of the separation claw at a portion covering the front end portion in the sheet conveying direction, and the other is provided at a portion covering the paper corner at the other portion. By providing the mark indicating the proper range, even if the pair of separation claws have different shapes and fulcrums, the load can be easily balanced. Therefore, sheet separation without skew can be obtained, and separation performance without non-feed and double feed can be obtained.
[0028]
According to the fifth aspect of the invention, a member or mark indicating an appropriate range of the separation claw covering the front end corner of the sheet in the sheet conveyance direction is colored differently from the separation claw, so that the side fence of the sheet feeding cassette is provided. When the sheet width is changed to change the different sheet width, the portion of the separation claw covering the corner can be visually checked by color identification, and the position can be set appropriately. Therefore, non-separation, double feeding, etc., in which the paper cannot be separated, can be prevented. Further, the cause of paper jam and paper jam can be easily investigated, and the maintenance efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a paper feed cassette according to an embodiment of the present invention.
FIG. 2 is a perspective view of a separation claw according to first and second embodiments of the present invention.
FIG. 3 is a perspective view of a separation claw according to a third embodiment of the present invention.
FIG. 4 is a partial view of a separation claw according to a fourth embodiment of the present invention.
FIG. 5 is a diagram showing the relationship between the separation claw pressure and the amount of the separation claw covering the front end corner in the sheet conveyance direction according to a fourth embodiment of the present invention.
FIG. 6 is a perspective view showing a separation claw according to a fifth embodiment of the present invention.
FIG. 7 is a perspective view showing another separation claw according to the fifth embodiment of the present invention.
FIG. 8 shows a configuration diagram of a conventional paper feed cassette.
[Explanation of symbols]
1, 1 '... paper feed cassette 2 ... bottom plate 3 ... separation claw 3a ... claw portion 4 ... paper feed rollers 5a, 5b ... support shaft 6 ... spring 7 ... fulcrum shaft 8, 20, 30, 32 ... movable side separation claw 8a , 9a, 20a, 21a, 30a, 32a ... claw portions 8b, 9b, 20b, 21b, 30b, 32b ... holes 9, 21 ... fixed side separation claws 10 ... movable side fences 11 ... fixed side fences 12 ... guide grooves 13 ... End fence 14 ... Slide groove 15 ... First member 16 ... Second member 17 ... L line 18 ... M line 31 ... Coloring member 33 ... Coloring line

Claims (5)

積載した用紙を分離爪により一枚毎分離させる給紙カセットにおいて、前記分離爪の前記用紙の搬送方向前端部コーナを覆う部分に、該用紙を覆う適正範囲を表示したことを特徴とする給紙カセット。In a paper feed cassette for separating stacked paper sheets one by one by a separation claw, an appropriate range for covering the sheet is displayed on a portion of the separation claw covering a front end corner of the sheet in the conveyance direction of the sheet. cassette. 積載した用紙を分離爪により一枚毎分離させる給紙カセットにおいて、前記用紙の側端部を規正するサイドフェンスと、このサイドフェンスに支持される分離爪とを備えるとともに、前記分離爪の前記用紙の搬送方向前端部コーナを覆う部分に該記用紙を覆う適正範囲を示す部材を設けたことを特徴とする給紙カセット。In a paper feed cassette for separating loaded paper sheets one by one by a separation claw, a sheet fence provided with a side fence for regulating a side end of the sheet, a separation claw supported by the side fence, and the separation claw of the sheet A sheet cassette, wherein a member indicating an appropriate range for covering the recording sheet is provided in a portion covering the front end corner in the conveying direction. 積載した用紙を分離爪により一枚毎分離させる給紙カセットにおいて、前記用紙の側端部を規正するサイドフェンスと、このサイドフェンスに支持される分離爪とを備えるとともに、前記分離爪の前記用紙の搬送方向前端部コーナを覆う部分に該用紙を覆う適正範囲を示す印を付けたことを特徴とする給紙カセット。In a paper feed cassette for separating loaded paper sheets one by one by a separation claw, a sheet fence provided with a side fence for regulating a side end of the sheet, a separation claw supported by the side fence, and the separation claw of the sheet A paper cover cassette having a mark that indicates an appropriate range for covering the sheet in a portion covering the front end corner in the conveying direction. 積載した用紙を分離爪により一枚毎分離させる給紙カセットにおいて、前記用紙の一方の側端部を規正する第1サイドフェンスと、他方の側端部を規正する第2サイドフェンスと、前記第1サイドフェンスに支持される第1分離爪と、前記第2サイドフェンスに支持される第2分離爪と、前記第1または第2分離爪の一方に、前記用紙の搬送方向前端部コーナを覆う部分に前記用紙を覆う適正範囲を示す部材を設け、前記第1または第2分離爪の他方に前記用紙を覆う適正範囲を示す印を付けたことを特徴とする給紙カセット。A first side fence for regulating one side end of the paper, a second side fence for regulating the other side end, and a second side fence for regulating the one side end of the sheet. A first separation claw supported by one side fence, a second separation claw supported by the second side fence, and one of the first or second separation claw covers a front end corner in the sheet conveyance direction. A sheet cassette, wherein a member indicating an appropriate range for covering the sheet is provided on a portion thereof, and a mark indicating an appropriate range for covering the sheet is marked on the other of the first and second separation claws. 前記分離爪に示す前記適正範囲を、該分離爪本体とは異なる色にしたことを特徴とする請求項2又は記載の給紙カセット。Paper feed cassette according to claim 2 or 3 wherein the proper range shown in separating claw, characterized in that the color different from that of the said separating claw body.
JP07803796A 1996-03-29 1996-03-29 Paper cassette Expired - Fee Related JP3539605B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07803796A JP3539605B2 (en) 1996-03-29 1996-03-29 Paper cassette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07803796A JP3539605B2 (en) 1996-03-29 1996-03-29 Paper cassette

Publications (2)

Publication Number Publication Date
JPH09267941A JPH09267941A (en) 1997-10-14
JP3539605B2 true JP3539605B2 (en) 2004-07-07

Family

ID=13650634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07803796A Expired - Fee Related JP3539605B2 (en) 1996-03-29 1996-03-29 Paper cassette

Country Status (1)

Country Link
JP (1) JP3539605B2 (en)

Also Published As

Publication number Publication date
JPH09267941A (en) 1997-10-14

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