JP2005001783A - Paper feeding tray - Google Patents
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- JP2005001783A JP2005001783A JP2003164525A JP2003164525A JP2005001783A JP 2005001783 A JP2005001783 A JP 2005001783A JP 2003164525 A JP2003164525 A JP 2003164525A JP 2003164525 A JP2003164525 A JP 2003164525A JP 2005001783 A JP2005001783 A JP 2005001783A
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- Prior art keywords
- tray
- paper
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- Handling Of Cut Paper (AREA)
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【0001】
【発明の属する分野】
本発明は、給紙トレイ自体に用紙束を持上げる機構を具えた給紙トレイに関するものである。
【0002】
【従来の技術】
プリンターへの給紙は、プリンターにセットする給紙トレイによって行われている。
給紙トレイに収容した用紙束は、持上げ機構によって用紙引出し側が持ち上げられ、最上部の用紙がプリンター内の給紙ローラに当たる様になっている。
持上げ機構は、プリンター内に用紙の減りに応じて上昇するアームを設け、該アームをトレイの底を貫通してトレイ内に侵入させ、トレイ底部に設けた板状の持上げ部材を斜めに上昇させるもの(特許文献1)と、図2に示す如く、トレイ自体に持上げ部材(2)を上向き付勢するバネ(4)を配備したものがある。
【0003】
前者は、用紙持上げ機構が複雑となる。
後者は、トレイ本体(1)の前壁(11)(用紙引出し側の壁)にバネ(4)を配備し、該バネ(4)に板状の持上げ部材(2)の自由端を被せ、該持上げ部材の基端をトレイ底板(15)に枢支するだけで済むため、構成を簡素化できる。
後者の給紙トレイは、図5(a)に示す如く、蓋体(3)を軸(33)を中心に回転させて閉じていくと、図5(b)に示す如く、蓋体(3)の自由端が用紙束の用紙引き出し側端部をバネ(4)に抗して下方に押圧し、用紙束(6)全体をトレイ本体(1)に収容出来、最上部の用紙(61)の高さ位置が決まる。
この状態で、給紙トレイをプリンターにセットすれば、最上部の用紙(61)が、プリンター内の用紙引出しローラに接し、該ローラの回転によってトレイから引き出される。
【0004】
【発明が解決しようとする課題】
後者の給紙トレイの場合、蓋体(3)を閉じた際に、図6に示す如く、最上部の用紙(61)が位置ズレして、トレイ本体(1)の側壁(14)に載ってしまい、該用紙の引出し側縁が引出しローラに正しく引っ掛からず、給紙に失敗することがある。
用紙(61)の位置ズレの原因は次の通りである。
図5(a)に示す如く、用紙束(6)をトレイ本体(1)の持上げ部材(2)に載せたた状態では、バネ(4)力が用紙束(6)の重さに勝り、用紙束(6)は傾いて、用紙束(6)の用紙引出し側端部は、トレイ本体(1)から上方にはみ出し、反対側端部はトレイ本体(1)内に収まる。
【0005】
上記状態のまま、図5(b)に示す如く、蓋体(3)を閉じると、蓋体(3)の自由端が、用紙束(6)のトレイ本体(1)からはみ出ている端部を押圧する。用紙束(6)のはみ出し側には、用紙のズレを防ぐものが存在しないため、蓋体(3)を閉じる際の、力の入れ加減や、蓋体(3)を押す位置等により、蓋体(3)の自由端に均等に力が加わらない場合に、用紙(61)の位置ズレが生じ易い。
トレイ本体(1)の両側壁(13)(14)の内、一方の側壁(14)内面には、用紙束(6)を他方の側壁(13)に押し付けるための、付勢部材(5)(5)が設けられており、該付勢部材(5)の上端面に位置ズレした用紙(61)が載ってしまうことが多い。
本発明は、上記問題を解決できる給紙トレイを明らかにするものである。
【0006】
尚、特許文献1の給紙トレイは、持上げ部材を上向き付勢するバネを有しておらず、プリンターに給紙トレイをセットするまでは、持上げ部材はトレイ底面に接している。このため、蓋体を閉じる前に、トレイ内に用紙束を完全に収容できるため、上記した蓋体を閉じる際の、用紙の位置ズレの問題は生じない。
【0007】
【特許文献1】
特開平8−244995号公報
【0008】
【課題を解決する手段】
本発明は、トレイ本体(1)と、該トレイ本体の底部に配備されトレイに収容される用紙の、用紙引出し側端部を持ち上げる持上げ部材(2)と、持上げ部材(2)を持ち上げ方向に付勢するバネと、回転して開閉可能にトレイ本体(1)に取り付けられ用紙引出し側が自由端となっている蓋体(3)とによって構成されるプリンターの給紙トレイにおいて、蓋体(3)の内面には用紙の持上げ側とは反対側を下向きに押圧可能に凸部(34)が形成されている。
【0009】
【作用及び効果】
蓋体(3)を閉じる途上で、トレイ本体(1)内の持上げ部材(2)によって斜めに傾いた状態の用紙束(6)を、蓋体(3)上の凸部(34)が押さえる。
凸部(34)は蓋体(3)の回転中心側に位置しているため、紙束(6)のトレイ本体(1)に嵌まり込んでいる部分を押圧する。このため用紙(61)に位置ズレは生じない。
【0010】
【発明の実施の形態】
図1は給紙トレイ、図2はその分解図である。
給紙トレイは、トレイ本体(1)と、該トレイ本体の底部に配備されトレイに収容される用紙束の、用紙引出し側端部を持ち上げる持上げ部材(2)と、持上げ部材(2)を持ち上げ方向に付勢するバネ(4)と、回転して開閉可能にトレイ本体(1)に取り付けられ用紙引出し側が自由端となっている蓋体(3)とによって構成される。
以下の説明で、「前」とは、トレイに収容された用紙束(6)に対する用紙引出し側である。
【0011】
トレイ本体(1)は、前壁(11)、後壁(12)、左右の側壁(13)(14)及び底板(15)からなり、樹脂にて一体成形されている。
実施例のトレイ本体(1)は、長さ180mm、幅123mm(葉書サイズ)の用紙を収容できる大きさであり、前後に長い。
一方の側壁(14)には、トレイ本体(1)の用紙束を他方の側壁(13)に押圧する複数の付勢部材(5)が設けられている。
実施例の付勢部材(5)は、トレイ本体(1)と一体成形された板バネ片であり、側壁(14)内面より少し突出している。
【0012】
両側壁(13)(14)の外面には、後記する蓋体(3)の脚片(32)(32)が嵌まる凹み段部(13a)(14a)が形成される。凹み段部(13a)(14a)は、側壁(13)(14)の上半分位置し、前後に長く延びており、側壁(13)(14)の上端に開口している。
凹み段部(13a)(14a)の前後端は、トレイ本体(1)の前後壁(11)(12)に近い位置にある。
凹み段部(13a)(14a)の後部に、蓋体取付け用の軸孔(19)(19)が開設され、前部に蓋体ロック用の凹部(19a)が開設されている。
前壁(11)の両端には、後記する補助トレイ枠(7)が嵌まる切欠部(18)(18)が開設されている。前壁(11)の内面の左右2箇所に、上端が閉じた縦溝(17)(17)が開設されている。
底板(15)には、持上げ部材取付け用のU字状の2つの切込み(16)が、両端を前向きにして、後壁(12)寄りに開設されている。
図4(a)に示す如く、後壁(12)内面から切込み(16)の後端までの距離Lは、約45mm、これは、用紙の長さの1/4程度である。
底板(15)の前部には、前壁(11)に接近して左右2箇所に2つのバネ座(10)(10)が浅く凹設されている。
【0013】
持上げ部材(2)は、前後に長い略矩形の板体であって、後端両側及び前端両側に爪片(21)(21)、(22)(22)を突設している。
図2、図4に示す如く、後端の爪片(21)は短く下向きに延び、更に後方に屈曲している。
前端の爪片(22)は短く下向きに延び、更に前方に屈曲している。
持上げ部材(2)は、後端の爪片(21)(21)を前記底板(15)のU字状切込み(16)(16)に嵌めて先端を底板(15)の下面に当てている。爪片(21)(21)が持上げ部材(2)の回動支点となる。
持上げ部材(2)の前端の爪片(22)(22)は、前記トレイ本体前壁(11)の縦溝(17)(17)に係入している。
トレイ本体底板(15)と持上げ部材(2)との間に、2つのコイルバネ(4)が介装される。バネ(4)の下端は、前記バネ座(10)に嵌まって位置ズレが防止されている。
持上げ部材(2)の爪片(22)が縦溝(17)の上端閉塞縁に当たって、持上げ部材(2)の上昇高さ規制される。
持上げ部材(2)の自由端は、トレイ本体(1)の前壁(11)の高さより少し低い位置にある。
尚、図7、図8は、上記バネ(4)を外して、持上げ部材(2)を底板(15)に密着させた状態を示している。
【0014】
持上げ部材(2)が用紙束(6)を安定して支持するためには、持上げ部材(2)の幅長さは、前記トレイ本体(1)上の付勢部材(5)に緩衝しない範囲で広幅とすることが望しい。
実施例では、トレイ本体(1)に、図8に示す補助トレイ枠(7)を着脱可能に嵌めて、小サイズの用紙も使用可能としたため、持上げ部材(2)は、補助トレイ枠(7)に緩衝しない大きさに形成されている。
【0015】
図7に示す如く、補助トレイ枠(7)は、前枠部材(71)、後枠部材(72)及び両側枠部材(73)(74)によって構成される矩形の枠体である。
補助トレイ枠(7)の側枠部材(73)(74)の前部には、トレイ本体(1)の切欠部(18)の下縁が嵌まる切欠(73a)が開設されている。
又、一方の側枠部材(74)には、前記トレイ本体(1)の付勢部材(5)と同様にして、用紙束の側縁を他方の側枠部材(73)に押圧する板バネ状の複数の付勢部材(75)が設けられている。
【0016】
図8に示す如く、補助トレイ枠(7)をトレイ本体(1)にセットした状態では、補助トレイ枠(7)の後枠部材(72)はトレイ本体後壁(12)内面に当たり、両側枠部材(73)(74)の前端は、トレイ本体前壁(11)の左右の切欠部(18)(18)に嵌まり、補助トレイ枠(7)の前枠部材(71)は、トレイ本体前壁(11)の外側に位置する。
補助トレイ枠(7)は、トレイ本体の付勢部材(5)によって、反対側の側壁(13)(14)に押しつけられる。
補助トレイ枠(7)の外周壁高さは、トレイ本体外周の壁高さに揃う。
補助トレイ枠(7)の、側枠部材(73)(74)、後枠部材(72)及びトレイ本体前壁(11)で囲まれる空間が、小サイズの用紙収容部となる。
【0017】
蓋体(3)は、矩形の蓋板(31)の左右両側縁に前後に長い脚片(32)(32)を下向きに突設している。
脚片(32)の前端は、蓋板(31)の前端より後方に位置し、脚片(32)(32)の後部は蓋板(31)の後端より後方に延びている。
図3に示す如く、脚片(32)(32)の後端内面に丸軸(33)が突設され、該丸軸(33)が前記トレイ本体(1)の軸孔(19)に回動可能に嵌まる。
脚片(32)(32)の前端には、指掛かり凹み(38)が形成され、該凹み(38)の裏面には、突起(39)が突設されている。該突起(39)は、蓋体(3)を閉じる際に、トレイ本体側壁(13)(14)に当たってから、樹脂の弾性変形によって、側壁(13)(14)に形成した凹部(19a)に嵌まって、蓋体(3)を閉じ状態に軟係止(ロック)できる。
蓋体(3)をロックしたとき、蓋板(31)はトレイ本体底板(15)と平行になり、蓋板(31)の高さはトレイ本体(1)の周囲の壁の高さに揃う。
又、蓋板(31)の自由端は、トレイ本体前壁(11)の前面から8mm程度後方に位置する。
【0018】
本発明の特徴は、上記蓋体(3)の下面に、用紙束(6)を押圧可能な凸部(34)を形成した点である。
実施例では、4つの凸部(34)(35)(36)(37)が、蓋体(3)の回転中心側から自由端側へ略等間隔に突設され、各凸部(34)(35)(36)(37)は、用紙の引出し方向と直交する方向に延びる突条体を呈している。
凸部(34)(35)(36)(37)は、蓋体(3)の回転中心に近い凸部ほど、突出高さが大きくなっており、蓋体(3)を閉じる途上で、蓋体(3)の回転中心に近い凸部から順に用紙を押さえることができる。
蓋体(3)を閉じる手前で蓋体(3)の自由端がバネ(4)に抗して用紙束の前部を下向きに押圧し、蓋体(3)を閉じ終えると、用紙束(6)を完全にトレイ本体(1)内に収容できる。
【0019】
実施例では、用紙束(6)が完全にトレイ本体(1)内に収容された状態において、蓋体(3)の各凸部(34)(35)(36)(37)は、用紙とは接触しない様に、凸部(34)(35)(36)(37)の高さが決められている。
具体的には、凸部(34)(35)(36)(37)の高さは、4mm、2.5mm、2mm、1mmであり、凸部間の間隔は約20mm、最後部の最も突出高さの大きい凸部(34)からトレイ本体後壁(12)内面までまでの距離は42mm程度である。
【0020】
各凸部(34)(35)(36)(37)は両端がトレイ本体側壁(13)(14)に接近している程、紙ズレ防止には望ましいが、実施例では、トレイ本体(1)に補助トレイ枠(7)を装着可能としたため、補助トレイ枠(7)に緩衝しない長さとしている。
但し、補助トレイ枠(7)に、凸部(34)(35)(36)(37)を逃がす、溝、凹み部等を形成しておけば、凸部(34)(35)(36)(37)をトレイ本体側壁(13)(14)に接近して延ばすことが可能となる。
実施例では、一部の凸部(35)は、その端部が補助トレイ枠(7)の付勢部材(75)(75)間の逃がし部(76)に侵入する長さに形成されている。
凸部(34)(35)(36)(37)は、用紙への傷付けを防止するため、両端を含む各角部が丸く面取りされている。
【0021】
然して、蓋体(3)を開き、用紙束(6)を、その長手方向の端部をトレイ本体(1)の後壁(12)内面に当てて、持上げ部材(2)の上に載せる。
用紙束(6)の重量よりバネ(4)の力が勝り、用紙束(6)は、持上げ部材(2)の傾きに沿って傾く。即ち、用紙束(6)の後部は、トレイ本体(1)内に収まるが、前端はトレイからはみ出る。
【0022】
蓋体(3)を閉じる途上で、蓋体(3)の凸部(34)(35)(36)(37)の内、蓋体(3)の回転中心に最も使い凸部(34)が用紙束(6)の後部を下向きに押圧する。
用紙束(6)の後部は、トレイ本体(1)内に嵌まり込んでおり、凸部(34)で用紙束(6)の後部を下向きに押圧にしても、用紙が位置ズレする余地はない。
蓋体(3)が閉じ方向に回転するに従って、蓋体(3)の回転中心から近い順に凸部(35)(36)(37)が順に用紙束(6)を押圧し、用紙束(6)は後部側から徐々にトレイ本体(1)内に嵌まり込む。
蓋体(3)が閉じ終わる手前で、蓋体(3)の自由端が用紙束(6)を押さえるが、用紙束(6)は既に凸部(34)(35)(36)(37)によって押さえられているため、蓋体(3)の自由端が用紙束(6)に当たっても、最上部の用紙(61)が位置ズレすることは効果に防止される。
【0023】
実施例では、蓋体(3)を閉じ状態にロックした状態で、凸部(34)(35)(36)(37)は用紙束(6)から離れて、用紙束(6)を押圧していないため、最上部の用紙(61)を引出しローラで引き出す際に、引出し抵抗が増すことはない。
【0024】
凸部(34)(35)(36)(37)の形状、大きさ、配置、個数は、トレイの大きさ、用紙の種類等に応じて、適宜設計変更できる。要は、凸部によって蓋体(3)の自由端が用紙束(6)を押さえる前に、用紙束(6)の後部、即ち、トレイ本体(1)に嵌まり込むんでいる後端側を押圧できれば可い。
蓋体(3)の蓋板後部に用紙束(6)を押圧可能な1つの凸部(34)を設けるだけでも、用紙ズレ防止に効果がある。
又、凸部を蓋体(3)の前後方向に長い突条体とし、該突条体を蓋体(3)の回転中心側から蓋体(3)の自由端へ徐々に低くなる様にすれば、前記同様に用紙ズレ防止に効果がある。用紙の左右両端側を押圧可能に、該突条体を蓋体(3)の左右両端寄りに複数条設けることにより、一層用紙ズレ防止に効果的である。
【0025】
トレイ本体(1)に補助トレイ枠(7)を装着して小サイズの用紙を給紙する場合でも、上記同様にて、用紙ズレ防止に効果がある。
【0026】
上記実施例の説明は、本発明を説明するためのものであって、特許請求の範囲に記載の発明を限定し、或は範囲を減縮する様に解すべきではない。又、本発明の各部構成は上記実施例に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能であることは勿論である。
例えば、本発明の給紙トレイは、プリンターに限らず、複写機の給紙トレイ等、給紙する相手装置を撰ばない。
【図面の簡単な説明】
【図1】給紙トレイの斜面図である。
【図2】給紙トレイの分解斜面図である。
【図3】蓋体を斜め下方から見た斜面図である。
【図4】a図は、用紙束の後端側を蓋体の凸部で押圧している状態の説明図、b図は、蓋体の自由端で用紙束の前端側を押圧している状態の説明図である。
【図5】a図は、従来例において、用紙束を持上げ部材に載せた状態の説明図で、b図は、蓋体で用紙束を押圧して、トレイ本体に用紙束を収容した状態の説明図である。
【図6】トレイ本体(1)に対して用紙が位置ズレした状態の平面図である。
【図7】トレイ本体と補助トレイ枠の斜面図である。
【図8】トレイ本体と補助トレイ枠を組み合わせた状態の斜面図である。
【符号の説明】
(1) トレイ本体
(2) 持上げ部材
(3) 蓋体
(31) 蓋板
(34) 凸部
(4) バネ
(7) 補助トレイ枠[0001]
[Field of the Invention]
The present invention relates to a paper feed tray provided with a mechanism for lifting a bundle of paper on the paper feed tray itself.
[0002]
[Prior art]
Paper feeding to the printer is performed by a paper feeding tray set in the printer.
The bundle of sheets stored in the sheet feed tray is lifted on the sheet withdrawal side by the lifting mechanism so that the uppermost sheet hits the sheet feed roller in the printer.
The lifting mechanism is provided with an arm that rises as the paper decreases in the printer, penetrates the bottom of the tray and enters the tray, and lifts the plate-like lifting member provided at the bottom of the tray diagonally. There are one (Patent Document 1) and one provided with a spring (4) for urging the lifting member (2) upward on the tray itself as shown in FIG.
[0003]
In the former, the paper lifting mechanism is complicated.
In the latter, a spring (4) is provided on the front wall (11) (paper drawer side wall) of the tray body (1), and the spring (4) is covered with the free end of the plate-like lifting member (2). Since it is only necessary to pivotally support the base end of the lifting member on the tray bottom plate (15), the configuration can be simplified.
As shown in FIG. 5 (a), the latter sheet feed tray is closed by rotating the lid (3) about the shaft (33) as shown in FIG. 5 (b). ) Presses the sheet drawing side end of the sheet bundle downward against the spring (4), the entire sheet bundle (6) can be accommodated in the tray body (1), and the uppermost sheet (61) The height position of is determined.
In this state, when the paper feed tray is set in the printer, the uppermost paper (61) comes into contact with the paper drawing roller in the printer and is drawn out of the tray by the rotation of the roller.
[0004]
[Problems to be solved by the invention]
In the case of the latter paper feed tray, when the lid (3) is closed, as shown in FIG. 6, the uppermost paper (61) is displaced and placed on the side wall (14) of the tray body (1). As a result, the paper drawing side edge may not be correctly caught by the drawing roller, and the paper feeding may fail.
The cause of the positional deviation of the paper (61) is as follows.
As shown in FIG. 5A, when the sheet bundle (6) is placed on the lifting member (2) of the tray body (1), the spring (4) force is superior to the weight of the sheet bundle (6). The sheet bundle (6) is tilted so that the sheet drawing side end of the sheet bundle (6) protrudes upward from the tray main body (1), and the opposite end is accommodated in the tray main body (1).
[0005]
In the above state, as shown in FIG. 5B, when the lid (3) is closed, the free end of the lid (3) protrudes from the tray body (1) of the sheet bundle (6). Press. Since there is nothing on the protruding side of the sheet bundle (6) that prevents the sheet from shifting, the cover can be changed depending on the force applied when closing the cover (3), the position of pressing the cover (3), etc. When the force is not uniformly applied to the free end of the body (3), the paper (61) is likely to be misaligned.
An urging member (5) for pressing the sheet bundle (6) against the other side wall (13) on the inner surface of one side wall (14) of the side walls (13), (14) of the tray body (1). (5) is provided, and the misaligned paper (61) is often placed on the upper end surface of the biasing member (5).
The present invention clarifies a paper feed tray that can solve the above problems.
[0006]
Note that the paper feed tray of Patent Document 1 does not have a spring that urges the lifting member upward, and the lifting member is in contact with the bottom of the tray until the paper feeding tray is set in the printer. For this reason, since the sheet bundle can be completely accommodated in the tray before the lid is closed, there is no problem of misalignment of the paper when the lid is closed.
[0007]
[Patent Document 1]
JP-A-8-244959
[Means for solving the problems]
The present invention relates to a tray main body (1), a lifting member (2) for lifting a paper drawer side end of a sheet disposed at the bottom of the tray main body and accommodated in the tray, and the lifting member (2) in the lifting direction. In a paper feed tray of a printer configured by an urging spring and a lid (3) which is attached to the tray body (1) so as to be rotatable and can be opened and closed and whose paper withdrawal side is a free end, the lid (3 ) Is formed with a convex portion (34) so that the side opposite to the paper lifting side can be pressed downward.
[0009]
[Action and effect]
In the course of closing the lid (3), the convex portion (34) on the lid (3) presses the sheet bundle (6) inclined obliquely by the lifting member (2) in the tray body (1). .
Since the convex portion (34) is located on the rotation center side of the lid (3), it presses the portion of the paper bundle (6) that is fitted into the tray body (1). For this reason, no positional deviation occurs in the paper (61).
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 is a paper feed tray, and FIG. 2 is an exploded view thereof.
The paper feed tray is composed of a tray main body (1), a lifting member (2) for lifting a paper drawer side end of a bundle of papers disposed at the bottom of the tray main body and housed in the tray, and a lifting member (2). It comprises a spring (4) that biases in the direction and a lid (3) that is attached to the tray body (1) so as to be able to open and close by rotation and has a free end on the paper drawer side.
In the following description, “front” is the paper drawer side for the sheet bundle (6) accommodated in the tray.
[0011]
The tray body (1) includes a front wall (11), a rear wall (12), left and right side walls (13) and (14), and a bottom plate (15), and is integrally formed of resin.
The tray main body (1) of the embodiment is large enough to accommodate a sheet having a length of 180 mm and a width of 123 mm (postcard size), and is long in the front-rear direction.
One side wall (14) is provided with a plurality of urging members (5) for pressing the sheet bundle of the tray main body (1) against the other side wall (13).
The urging member (5) of the embodiment is a leaf spring piece integrally formed with the tray body (1) and slightly protrudes from the inner surface of the side wall (14).
[0012]
On the outer surfaces of the side walls (13) and (14), recessed step portions (13a) and (14a) into which leg pieces (32) and (32) of the lid (3) described later are fitted are formed. The recessed step portions (13a) and (14a) are located in the upper half of the side walls (13) and (14), extend long in the front-rear direction, and open at the upper ends of the side walls (13) and (14).
The front and rear ends of the recessed step portions (13a) and (14a) are located at positions close to the front and rear walls (11) and (12) of the tray body (1).
Shaft holes (19) and (19) for attaching the lid are formed at the rear of the recessed step portions (13a) and (14a), and a recess (19a) for locking the lid is opened at the front.
At both ends of the front wall (11), notches (18) and (18) into which an auxiliary tray frame (7) described later is fitted are formed. Longitudinal grooves (17) (17) whose upper ends are closed are formed at two positions on the left and right sides of the inner surface of the front wall (11).
In the bottom plate (15), two U-shaped cuts (16) for attaching the lifting member are opened toward the rear wall (12) with both ends facing forward.
As shown in FIG. 4A, the distance L from the inner surface of the rear wall (12) to the rear end of the cut (16) is about 45 mm, which is about 1/4 of the length of the paper.
At the front part of the bottom plate (15), two spring seats (10) (10) are shallowly recessed in two places on the left and right sides, approaching the front wall (11).
[0013]
The lifting member (2) is a substantially rectangular plate that is long in the front-rear direction, and has claw pieces (21), (21), (22), and (22) protruding from both sides of the rear end and both sides of the front end.
As shown in FIGS. 2 and 4, the claw piece (21) at the rear end is short and extends downward, and is further bent backward.
The front end claw piece (22) is short and extends downward, and is further bent forward.
The lifting member (2) has the rear end claw pieces (21) and (21) fitted into the U-shaped cuts (16) and (16) of the bottom plate (15), and the tip is applied to the lower surface of the bottom plate (15). . The claw pieces (21) and (21) serve as pivot points for the lifting member (2).
The claw pieces (22) and (22) at the front end of the lifting member (2) are engaged with the longitudinal grooves (17) and (17) of the tray body front wall (11).
Two coil springs (4) are interposed between the tray body bottom plate (15) and the lifting member (2). The lower end of the spring (4) is fitted into the spring seat (10) to prevent displacement.
The claw piece (22) of the lifting member (2) hits the upper end closing edge of the longitudinal groove (17), and the rising height of the lifting member (2) is restricted.
The free end of the lifting member (2) is at a position slightly lower than the height of the front wall (11) of the tray body (1).
7 and 8 show a state in which the spring (4) is removed and the lifting member (2) is brought into close contact with the bottom plate (15).
[0014]
In order for the lifting member (2) to stably support the sheet bundle (6), the width of the lifting member (2) is in a range not buffered by the biasing member (5) on the tray body (1). It is desirable to make it wide.
In the embodiment, the auxiliary tray frame (7) shown in FIG. 8 is detachably fitted to the tray body (1) so that a small-size sheet can be used. ) Is not damped.
[0015]
As shown in FIG. 7, the auxiliary tray frame (7) is a rectangular frame constituted by a front frame member (71), a rear frame member (72), and both side frame members (73) (74).
At the front part of the side frame members (73) and (74) of the auxiliary tray frame (7), a notch (73a) into which the lower edge of the notch part (18) of the tray body (1) is fitted is formed.
The one side frame member (74) has a leaf spring that presses the side edge of the sheet bundle against the other side frame member (73) in the same manner as the biasing member (5) of the tray body (1). A plurality of urging members (75) having a shape are provided.
[0016]
As shown in FIG. 8, in a state where the auxiliary tray frame (7) is set in the tray main body (1), the rear frame member (72) of the auxiliary tray frame (7) hits the inner surface of the rear wall (12) of the tray main body. The front ends of the members (73) and (74) fit into the left and right cutouts (18) and (18) of the tray body front wall (11), and the front frame member (71) of the auxiliary tray frame (7) Located outside the front wall (11).
The auxiliary tray frame (7) is pressed against the opposite side walls (13) and (14) by the biasing member (5) of the tray body.
The height of the outer peripheral wall of the auxiliary tray frame (7) is aligned with the wall height of the outer periphery of the tray body.
A space surrounded by the side frame members (73) and (74), the rear frame member (72), and the tray main body front wall (11) of the auxiliary tray frame (7) is a small-size sheet storage unit.
[0017]
The lid (3) has long leg pieces (32) and (32) projecting downward on the left and right side edges of the rectangular lid plate (31).
The front end of the leg piece (32) is located behind the front end of the lid plate (31), and the rear part of the leg piece (32) (32) extends rearward from the rear end of the lid plate (31).
As shown in FIG. 3, a round shaft (33) protrudes from the inner surface of the rear end of the leg pieces (32) and (32), and the round shaft (33) rotates into the shaft hole (19) of the tray body (1). Fits movably.
A finger hook recess (38) is formed at the front ends of the leg pieces (32) and (32), and a protrusion (39) is projected from the back surface of the recess (38). The protrusion (39) hits the recess (19a) formed in the side walls (13) and (14) by the elastic deformation of the resin after hitting the tray body side walls (13) and (14) when closing the lid (3). The lid (3) can be softly locked (locked) in the closed state by fitting.
When the lid (3) is locked, the lid plate (31) is parallel to the tray body bottom plate (15), and the height of the lid plate (31) is aligned with the height of the wall around the tray body (1). .
The free end of the lid plate (31) is located about 8 mm behind the front surface of the tray body front wall (11).
[0018]
A feature of the present invention is that a convex portion (34) capable of pressing the sheet bundle (6) is formed on the lower surface of the lid (3).
In the embodiment, four convex portions (34), (35), (36), and (37) project from the rotation center side of the lid (3) to the free end side at substantially equal intervals, and each convex portion (34). (35), (36), and (37) present ridges extending in a direction perpendicular to the paper drawing direction.
The protrusions (34), (35), (36), and (37) have a protruding height that is larger toward the protrusion closer to the center of rotation of the lid (3). The sheets can be pressed in order from the convex portion close to the center of rotation of the body (3).
Before closing the lid (3), the free end of the lid (3) presses the front part of the sheet bundle downward against the spring (4), and when the lid (3) is closed, 6) can be completely accommodated in the tray body (1).
[0019]
In the embodiment, in a state in which the sheet bundle (6) is completely accommodated in the tray body (1), the convex portions (34) (35) (36) (37) of the lid (3) The heights of the convex portions (34), (35), (36), and (37) are determined so as not to contact each other.
Specifically, the heights of the protrusions (34), (35), (36), and (37) are 4 mm, 2.5 mm, 2 mm, and 1 mm, and the distance between the protrusions is about 20 mm, with the most protruding part at the end. The distance from the convex part (34) having a large height to the inner surface of the rear wall (12) of the tray body is about 42 mm.
[0020]
Each convex part (34) (35) (36) (37) is more desirable for preventing paper misalignment as both ends thereof are closer to the tray body side wall (13) (14). The auxiliary tray frame (7) can be mounted on the auxiliary tray frame (7).
However, if grooves, dents, etc. are formed in the auxiliary tray frame (7) to release the projections (34) (35) (36) (37), the projections (34) (35) (36) (37) can be extended close to the tray body side walls (13) and (14).
In the embodiment, a part of the projecting portions (35) is formed to have such a length that the end portion enters the escape portion (76) between the biasing members (75) and (75) of the auxiliary tray frame (7). Yes.
In the convex portions (34), (35), (36), and (37), each corner including both ends is rounded and chamfered to prevent the paper from being damaged.
[0021]
Thus, the lid (3) is opened, and the sheet bundle (6) is placed on the lifting member (2) with its longitudinal end placed against the inner surface of the rear wall (12) of the tray body (1).
The force of the spring (4) is greater than the weight of the sheet bundle (6), and the sheet bundle (6) is inclined along the inclination of the lifting member (2). That is, the rear part of the sheet bundle (6) is accommodated in the tray body (1), but the front end protrudes from the tray.
[0022]
On the way to close the lid (3), of the convex portions (34), (35), (36) and (37) of the lid (3), the convex portion (34) most used at the center of rotation of the lid (3) is The rear part of the sheet bundle (6) is pressed downward.
The rear part of the sheet bundle (6) is fitted in the tray body (1), and even if the rear part of the sheet bundle (6) is pressed downward by the convex part (34), there is no room for misalignment of the sheets. Absent.
As the lid (3) rotates in the closing direction, the convex portions (35) (36) (37) press the sheet bundle (6) in order from the rotation center of the lid (3), and the sheet bundle (6) ) Gradually fit into the tray body (1) from the rear side.
Before the lid (3) closes, the free end of the lid (3) presses the sheet bundle (6). The sheet bundle (6) has already been raised (34) (35) (36) (37). Therefore, even if the free end of the lid (3) hits the sheet bundle (6), the uppermost sheet (61) is effectively prevented from being displaced.
[0023]
In the embodiment, the convex portions (34), (35), (36), and (37) are separated from the sheet bundle (6) and press the sheet bundle (6) with the lid (3) locked in the closed state. Therefore, when the uppermost sheet (61) is pulled out by the pulling roller, the pulling resistance does not increase.
[0024]
The shape, size, arrangement, and number of the convex portions (34), (35), (36), and (37) can be changed as appropriate according to the size of the tray, the type of paper, and the like. In short, before the free end of the lid (3) presses the sheet bundle (6) by the convex part, the rear part of the sheet bundle (6), that is, the rear end side fitted into the tray body (1) is arranged. If you can press.
Even if only one convex portion (34) capable of pressing the sheet bundle (6) is provided at the rear portion of the lid plate of the lid (3), it is effective in preventing sheet misalignment.
Further, the convex portion is a long ridge in the front-rear direction of the lid (3), and the ridge is gradually lowered from the rotation center side of the lid (3) to the free end of the lid (3). If this is the case, it is effective in preventing paper misalignment as described above. Providing a plurality of strips near the left and right ends of the lid (3) so that the left and right ends of the sheet can be pressed is more effective in preventing sheet misalignment.
[0025]
Even when the auxiliary tray frame (7) is attached to the tray main body (1) and small-size paper is fed, the same effect as described above is effective in preventing paper misalignment.
[0026]
The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.
For example, the paper feed tray of the present invention is not limited to a printer, and any other device that feeds paper, such as a paper feed tray of a copying machine, may be used.
[Brief description of the drawings]
FIG. 1 is a perspective view of a paper feed tray.
FIG. 2 is an exploded perspective view of a paper feed tray.
FIG. 3 is a slope view of the lid body as viewed from obliquely below.
4A is an explanatory diagram of a state in which the rear end side of the sheet bundle is pressed by the convex portion of the lid, and FIG. 4B is a diagram in which the front end side of the sheet bundle is pressed by the free end of the lid. It is explanatory drawing of a state.
5A is an explanatory diagram of a state in which a sheet bundle is placed on a lifting member in a conventional example, and FIG. 5B is a state in which the sheet bundle is stored in the tray body by pressing the sheet bundle with a lid. It is explanatory drawing.
FIG. 6 is a plan view showing a state where a sheet is displaced with respect to the tray body (1).
FIG. 7 is a perspective view of a tray body and an auxiliary tray frame.
FIG. 8 is a perspective view of a state in which the tray body and the auxiliary tray frame are combined.
[Explanation of symbols]
(1) Tray body (2) Lifting member (3) Lid (31) Lid (34) Protrusion (4) Spring (7) Auxiliary tray frame
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003164525A JP4010984B2 (en) | 2003-06-10 | 2003-06-10 | Paper feed tray |
CNB2004100465077A CN100509592C (en) | 2003-06-10 | 2004-06-08 | Paper feed tray and printer furnished with the tray |
US10/863,778 US7549632B2 (en) | 2003-06-10 | 2004-06-09 | Paper feed tray and printer furnished with the tray |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003164525A JP4010984B2 (en) | 2003-06-10 | 2003-06-10 | Paper feed tray |
Publications (2)
Publication Number | Publication Date |
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JP2005001783A true JP2005001783A (en) | 2005-01-06 |
JP4010984B2 JP4010984B2 (en) | 2007-11-21 |
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ID=34091266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003164525A Expired - Fee Related JP4010984B2 (en) | 2003-06-10 | 2003-06-10 | Paper feed tray |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101725366B1 (en) * | 2015-10-20 | 2017-04-11 | 디에스글로벌 (주) | Printing Paper Pressing Device of Portable Instant Cameras |
JP2017218235A (en) * | 2016-06-02 | 2017-12-14 | 株式会社リコー | Sheet material feeding device, image formation device, and attachment member for sheet material feeding device |
-
2003
- 2003-06-10 JP JP2003164525A patent/JP4010984B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101725366B1 (en) * | 2015-10-20 | 2017-04-11 | 디에스글로벌 (주) | Printing Paper Pressing Device of Portable Instant Cameras |
JP2017218235A (en) * | 2016-06-02 | 2017-12-14 | 株式会社リコー | Sheet material feeding device, image formation device, and attachment member for sheet material feeding device |
US10865058B2 (en) | 2016-06-02 | 2020-12-15 | Ricoh Company, Ltd. | Sheet feeding device, image forming apparatus incorporating the sheet feeding device, and device attachment body of the sheet feeding device |
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JP4010984B2 (en) | 2007-11-21 |
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