JP3840766B2 - Paper guide, roll paper set shaft and printer - Google Patents

Paper guide, roll paper set shaft and printer Download PDF

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Publication number
JP3840766B2
JP3840766B2 JP32536397A JP32536397A JP3840766B2 JP 3840766 B2 JP3840766 B2 JP 3840766B2 JP 32536397 A JP32536397 A JP 32536397A JP 32536397 A JP32536397 A JP 32536397A JP 3840766 B2 JP3840766 B2 JP 3840766B2
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Japan
Prior art keywords
shaft
spiral
guide
roll paper
paper
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JP32536397A
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Japanese (ja)
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JPH11139638A (en
Inventor
裕久 黒川
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Teraoka Seiko Co Ltd
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Teraoka Seiko Co Ltd
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Priority to JP32536397A priority Critical patent/JP3840766B2/en
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Description

【0001】
【発明の属する技術分野】
本発明はプリンタ等に用いられるロール用紙から繰り出された用紙をガイドする用紙ガイド、該ロール用紙をセットするロール用紙セット軸、該用紙ガイド又はロール用紙セット軸を具備するプリンタに関するものである。
【0002】
【従来の技術】
上記のようなロール用紙を用いるプリンタにおいては、用紙と印字部はその幅方向の中心線が互いに一致する方が、用紙の中心線を挟んで左右均一に印字できて好ましい。特に印字部にサーマルプリンタを用いる場合は、印字ヘッドの背後をバネで押して用紙を押圧するので、印字ヘッドの中心線と用紙の中心線がずれていると、用紙の該中心線を挟んで左右の押圧力が異なり、左右で印字濃度が不均一になるという問題があった。
【0003】
従来、上記印字ヘッドの中心線と用紙の中心線を一致させる技術としては、特開昭62−83958号公報に開示されたものがある。この技術はロール用紙の両端を保持する保持部材を外部のX字状レバーで支え、このレバーの交点をピンでプリンタ本体に支え、保持部材の一方を動かせば他方は逆方向に動いてセンタリングできるように構成されたものである。
【0004】
【発明が解決しようとする課題】
しかしながら、上記の技術はX字状レバーを小型化することが難しく、且つ邪魔となるという問題があった。そこでロール用紙の両端に接するそれぞれの部材を連結移動させることなく、それぞれ手動で目盛に合わせて動かしてセンタリングする方法も行われているが、作業性とセンタリング精度に問題があった。また、後者の方法は連続用紙を扱うプリンタの用紙ガイドとしても採用されているが上記と同様な問題があった。
【0005】
本発明は上述の点に鑑みてなされたもので、センタリングのための部材がロール用紙セットに邪魔にならず、小型でセンタリングが精度良く、センタリング作業が容易にできる用紙ガイド、ロール用紙セット軸及び該用紙ガイド、ロール用紙セット軸を用いたプリンタを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記課題を解決するため請求項1に記載の発明は、一端を台板に固定した軸を具備し、該軸上を搬送される用紙の幅方向の位置を規制する用紙ガイドにおいて、軸は、回転可能で且つ軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋状溝を設けると共に、略中央部の周方向に回転案内部を設けた螺旋軸と、螺旋軸を収納し、外周の所定位置に軸方向に伸びる開口部が形成され、且つ一端が前記台板に固定する筒状軸と、筒状軸の略中央部に固定され螺旋軸の回転案内部に係合する係合部と、中心部に筒状軸が貫通する穴が形成されると共に、筒状軸の開口部を通して螺旋軸の螺旋溝に係合する突起部を備え、螺旋軸の回転により螺旋溝に係合する突起部を介して互いに該筒状軸に沿って接近及び離間する一対のガイド板と、を備えたことを特徴とする。
【0007】
また、請求項2に記載の発明は、ロール用紙の中心穴に一端を台板に固定した軸を挿入し、該ロール用紙の幅方向の位置を規制するロール用紙セット軸において、軸は、回転可能で且つ軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋状溝を設けると共に、略中央部の周方向に回転案内部を設けた螺旋軸と、螺旋軸を収納し、外周の所定位置に軸方向に伸びる開口部が形成され、且つ一端が前記台板に固定する筒状軸と、筒状軸の略中央部に固定され螺旋軸の回転案内部に係合する係合部と、中心部に筒状軸が貫通する穴が形成されると共に、筒状軸の開口部を通して螺旋軸の螺旋溝に係合する突起部を備え、螺旋軸の回転により螺旋溝に係合する突起部を介して互いに該筒状軸に沿って接近及び離間する一対の押え部材と、を備えたことを特徴とする。
【0008】
また、請求項3に記載の発明は、請求項2に記載のロール用紙セット軸において、台板側の反対側の押え部材は、螺旋軸の螺旋溝に係合する突起部を具備し軸方向に移動可能な移動部材と、移動部材に対して着脱自在な押え板とを具備することを特徴とする。
【0009】
また、請求項4に記載の発明は、請求項1に記載の用紙ガイドを具備するプリンタにある。
【0010】
また、請求項5に記載の発明は、前記請求項2又は3に記載のロール用紙セット軸を具備するプリンタにある。
【0011】
【発明の実施の形態】
以下、本発明の実施の形態例を図面に基づいて説明する。図1は請求項1に記載の発明に係る用紙ガイドの構造を示す図である。図1において、11は本用紙ガイド10が取付けられるプリンターの台板であり、本用紙ガイド10は螺旋軸12、該螺旋軸12が収納される筒状軸13を具備し、筒状軸13の一端は台板11に固定されている。また、螺旋軸12は軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋状溝を設け、しかも、それぞれの螺旋方向に対して2本の溝を設けてなる螺旋軸であり、筒状軸13内で回転自在に配置されている。
【0012】
螺旋軸12の略中央部には回転案内溝15が設けられており、該回転案内溝15内に筒状軸13の中央部に固定されたピン16の先端部が係合されている。14は螺旋軸の他端に固定された操作つまみであり、該操作つまみ14を回転させることにより、螺旋軸12はその回転案内溝15がピン16に案内されて回転するようになっている。
【0013】
17は台板11側のガイド板、18は操作つまみ14側のガイド板である。ガイド板17及び18はそれぞれその中心部に筒状軸13が貫通する径の穴が形成されている。ガイド板17及び18にはそれぞれ後に詳述するように、該穴の内壁面から、筒状軸13の外周部に設けられた開口部13d、13eに突出し、その先端部が螺旋軸12の螺旋溝に係合するピン(突起部)21及び22が設けられている。
【0014】
上記構造の用紙ガイド10において、操作つまみ14を回転し、螺旋軸12を回転させると、その回転方向により螺旋溝に係合するピン21及び22を介して、ガイド板17及び18は互いに該筒状軸13に沿って接近又は離間するように移動する。従って、該一対のガイド板17及び18の間を搬送される用紙Wの幅寸法により、操作つまみ14を回転させて、ガイド板17及び18は互いに接近又は離間させることにより、用紙Wのセンタリングを容易に且つ精度良く行うことができる。以下、上記用紙ガイドを構成する各部品の構成を説明する。
【0015】
螺旋軸12はプリンターの台板11側の螺旋軸部材12−1と操作つまみ14側の螺旋軸部材12−2とから構成されている。図2はプリンターの台板11側の螺旋軸部材12−1の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は右側面図である。図3は操作つまみ14側の螺旋軸部材12−2の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は右側面図である。
【0016】
台板11側の螺旋軸部材12−1は図2に示すように、中心部に一端から軸方向に所定の寸法の穴12−1dが形成されると共に、該一端から軸方向に所定の寸法の螺旋溝12−1a、12−1a’が形成され、該螺旋溝12−1a、12−1a’の終端から軸方向に所定寸法の小径部12−1eが形成され、更に小径部12−1eの終端に前記回転案内溝15を形成するための大径の2個のフランジ部12−1b、12−1cが形成され、更に他端には小径の突出部12−1fが形成されている。
【0017】
操作つまみ14側の螺旋軸部材12−2は一端から軸方向に所定寸法の小径部12−2bが形成され、該小径部12−2bの終端から他端まで螺旋溝12−2a、12−1a’が形成され、中心部に一端から他端まで軸方向に所定の寸法の穴12−2cが形成されている。該穴12−2cの内径は螺旋軸部材12−1の他端の突出部12−1fが嵌入れる大きさである。螺旋軸部材12−1の他端面には操作つまみ14の穴に嵌合する一対の嵌合突起部12−2dが設けられている。
【0018】
螺旋軸12は螺旋軸部材12−1の他端の突出部12−1fを螺旋軸部材12−2は一端の穴12−2cに嵌入し、螺旋軸部材12−2の小径部12−2bのピン穴12−2eと螺旋軸部材12−1の突出部12−1fのピン穴12−1gにピンを嵌合することにより螺旋軸部材12−1と螺旋軸部材12−2を連結して構成される。これにより、螺旋軸部材12−1の螺旋溝12−1a、12−1a’と螺旋軸部材12−2の螺旋溝12−2a、12−2a’は互いに螺旋方向が逆方向となる。
【0019】
図4は筒状軸13の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は同図(b)のA−A断面図である。筒状軸13は前記螺旋軸12を収納できる内径を有する筒状部材からなり、一端は閉塞部13aで閉塞され他端は開口された構造である。一端の閉塞部13aの内面には螺旋軸12を構成する螺旋軸部材12−1の穴12−1dに挿入される螺旋軸支持突起部13bが形成されている。また、該閉塞部13aには筒状軸13の一端を台板11に固定するためのビス穴13cが形成されている。
【0020】
また、筒状軸13の外周の所定位置に軸方向に伸びる開口部13d及び13eが形成されている。該開口部13d及び13eはそれぞれ螺旋軸部材12−1の螺旋溝12−1a、12−1a’及び螺旋軸部材12−2の螺旋溝12−2a、12−2a’に対向しその寸法に略等しくなっている。また、筒状軸13の中央部外周には前記螺旋軸12の回転案内溝15に先端が係合するピン16を嵌入する一対の穴13fが設けられている。
【0021】
図5はガイド板17の構造を示す図で、同図(a)は正面図、同図(b)は左側面図である。なお、ガイド板18はガイド板17と略同じ構造であるのでその説明は省略する。ガイド板17は中心部に筒状軸13が貫通する穴17aが形成され、その一端には用紙Wの縁部を案内する案内面17cを有するフランジ部17bが形成され、他端部は小径部17dとなっている。該小径部17dの所定の位置には前記先端が螺旋軸部材12−1の螺旋溝12−1a、12−1a’にそれぞれ係合するピン21が嵌入される穴17eが前後に形成されている。そのため螺旋軸12の回転に応じてガイド板17はスムーズに移動できるようになっている。
【0022】
図6は操作つまみ14の構造を示す図で、同図(a)は一部断面正面図、同図(b)は左側面図である。操作つまみ14は図示するように円板状でその一側面には前記螺旋軸12を構成する螺旋軸部材12−2の他端の嵌合突起部12−2dを嵌入する一対の嵌入穴14aが形成されて、他側面にはガイド板17及び18が互いに接近する回転方向を示す矢印14b等を設けている。
【0023】
上記構造の用紙ガイドの組立ては、先ず、筒状軸13の一端をプリンターの台板11にビス23で固定する。次に閉塞部13aの螺旋軸支持突起部13bを螺旋軸部材12−1の一端の穴12−1dに挿入するように、螺旋軸12を筒状軸13内に収納する。続いて、筒状軸13の一対の穴13fにピン16を嵌入してその先端を螺旋軸12の回転案内溝15に係合させる。次に、ガイド板17、18のその中央部に設けられた穴に筒状軸13を挿入すると共に、先端が螺旋軸部材12−1の螺旋溝12−1a、12−1a’及び螺旋軸部材12−2の螺旋溝12−2a、12−2a’に係合するピン21、ピン22を嵌入して、ガイド板17、ガイド板18を取り付ける。その後操作つまみ14をその嵌入穴14aに螺旋軸12を構成する螺旋軸部材12−2の嵌合突起部12−2dを嵌入して取り付ける。
【0024】
用紙ガイドを上記構造とすることにより、一対のガイド板17とガイド板18との間隔を軸方向に互いに接近及び離間させて用紙W幅に合わせるセンタリング機構は、筒状軸13内に収納しているので、操作等において邪魔になることがなく、センタリング作業が容易で、且つ精度のよいセンタリングを行うことができる。ガイド板17及びガイド板18を直接動かして位置を調整するのではなく、螺旋軸12の回転により螺旋溝に係合するピン21、22を介して互いに筒状軸13に沿って接近及び離間する構成なので、ガイド板17及びガイド18の軸方向にずれようとする力に対して抗力が大きく、ガイド板17及びガイド位置18が設定した位置から簡単にずれることはない。
【0025】
図7及び図8は請求項2に記載の発明に係るロール用紙セット軸の構造を示す図で、図7は縦断面図、図8は移動部材33と押え板32の係合状態を示す図である。図7及び図8において、図1乃至図6と同一符号を付した部分は同一又は相当部分を示す。11は本ロール用紙セット軸30が取付けられるプリンターの台板であり、本ロール用紙セット軸30は螺旋軸12、該螺旋軸12が収納される筒状軸13を具備し、筒状軸13の一端は台板11にビス23、23で固定されている。また、螺旋軸12は軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋溝12−1a、12−1a’と12−2a、12−2a’を設けてなる螺旋軸であり、筒状軸13内に回転自在に配置されている。
【0026】
螺旋軸12の略中央部には回転案内溝15が設けられており、該回転案内溝15内に筒状軸13の中央部に固定されたピン16の先端部が係合するようになっている。螺旋軸12の他端に固定された操作つまみ14を回転させることにより、螺旋軸12はその回転案内溝15がピン16に案内されて回転するようになっている。
【0027】
31は台板11側の押え板、32は操作つまみ14側の押え板である。押え板31は中心部に筒状軸13が貫通する径の穴が形成され、押え板31は後に詳述するように、該穴の内壁面から、筒状軸13の外周部に設けられた開口部13dに突出し、その先端部が螺旋軸12の螺旋溝12−1a、12−1a’に係合するピン(突起部)21が設けられている。押え板32は後に詳述するように、移動部材33の外周部に係合し、該移動部材33の軸方向への移動に連動して移動するようになっている。移動部材33は前記ガイド板18と同様に中心部に筒状軸13が貫通する径の穴が形成されていて、該穴の内壁面から、筒状軸13の外周部に設けられた開口部13eに突出し、その先端部が螺旋軸12の螺旋溝12−2a、12−2a’に係合するピン(突起部)22が前後に設けられている。
【0028】
上記構造のロール用紙セット軸30において、操作つまみ14を回転し、螺旋軸12を回転させると、その回転方向により螺旋溝12−1a、12−1a’と12−2a、12−2a’に係合するピン21及び22を介して、押え板31及び押え板32は互いに該筒状軸13に沿って接近又は離間するようにスムーズに移動する。従って、該一対の押え板31及び押え板32の間にセットされるロール用紙の幅寸法により、操作つまみ14を回転させて、押え板31及び32は互いに接近又は離間させるロール用紙のセンタリングが容易で、且つ精度良く行うことができる。以下、上記用紙ガイドを構成する各部品の構成を説明する。
【0029】
螺旋軸12の構造は図2乃至図3に示す用紙ガイドのものと同一であるからその説明は省略する。また、操作つまみ14も図6に示す用紙ガイドのものと同一であるからその説明は省略する。
【0030】
図9は押え板31の構造を示す図で、同図(a)は縦断面図、同図(b)は右側面図である。押え板31は両端が円弧状をなす長方形状でその中心部に筒状軸13が貫通する穴31aが形成され、その1面にはロール用紙の端面が当接する4本のリブ31bが形成され、反対面の穴31aの外周部には所定肉厚の小径部31cが形成され、該小径部31cの所定の位置には先端が螺旋軸部材12−1の螺旋溝12−1a、12−1a’に係合するピン21が嵌入される穴31dが対称に2ケ形成されている。
【0031】
図10は前記移動部材33の構造を示す図で、同図(a)は正面図、同図(b)は右側面図、同図(c)は平面図である。移動部材33は円板状でその中心部に筒状軸13が貫通する穴33aが形成され、その一端にはロール用紙の端面が当接する当接面33bを有するフランジ部33cが形成され、他端には押え板32が係合する一対の突起部33d、33dが上下に計4個設けられ、一対の係合突起部33dと33dの間には後に詳述する押え板32の係合ピンが嵌合するピン嵌合溝33eが形成され、更に前記フランジ部33cと前記突起部33dの間には押え板32のガイド片が係合する溝33fが形成されている。また、移動部材33の所定の位置には先端が螺旋軸部材12−2の螺旋溝12−2a、12−2a’に係合するピン22が嵌入される穴33gが対称に2ケ形成されている。
【0032】
図11は押え板32の構造を示す図で、同図(a)は正面断面図(同図(b)のA−A断面)、同図(b)は左側面図、同図(c)は同図(b)のB−B断面図である。押え板32は両端が円弧状をなす長方形状でその中心部には前記移動部材33を収める穴32aが形成され、穴32aの内面には対向して一対の係合ピン32b、32bが形成され、該係合ピン32b、32bのそれぞれの両側には所定の間隙を設けて一対のガイド片32c、32cが設けられている。また、押え板32の1面にはロール用紙の端面が当接する4本のリブ32dが形成されている。
【0033】
上記構造のロール用紙セット軸の組立ては、先ず、筒状軸13の一端をプリンターの台板11にビス23で固定する。次に閉塞部13aの螺旋軸支持突起部13bを螺旋軸部材12−1の一端の穴12−1dに挿入するように、螺旋軸12を筒状軸13内に収納する。続いて、筒状軸13の一対の穴13fにピン16を嵌入してその先端が螺旋軸12の回転案内溝15に係合させる。次に、押え板31のその中央部に設けられた穴31aに筒状軸13を挿入すると共に、先端が螺旋軸部材12−1の螺旋溝12−1a、12−1a’に係合するピン21をそれぞれ嵌入して、押え板31を取り付ける。
【0034】
次に、移動部材33をその中央部に設けられた穴33aに筒状軸13を挿入すると共に、先端が螺旋軸部材12−2の螺旋溝12−2a、12−2a’に係合するピン22をそれぞれ嵌入して、移動部材33を取り付ける。続いて、移動部材33の外周の突起部33dが無い部分に押え板32の穴32aの係合ピン32b及びガイド片32cのある部分を合わせ、該穴32aに移動部材33の外周を挿入し、その後、押え板32の係合ピン32b及びガイド片32cが移動部材33の溝33fを通り、該係合ピン32b、32bが溝33e、33eに係合するまで押え板32を回転し、押え板32を移動部材に取り付ける。その後操作つまみ14をその嵌入穴14aに螺旋軸12の螺旋軸部材12−2の嵌合突起部12−2dを嵌入して取り付ける。
【0035】
ロール用紙セット軸30を上記構造とすることにより、一対の押え板31と押え板32との間隔を軸方向に互いに接近及び離間させてロール用紙幅に合わせるセンタリング機構は、筒状軸13内に収納しているので、操作等において邪魔になることがなく、センタリング作業が容易で、且つ精度のよいセンタリングを行うことができる。押え板31及び押え板32を直接動かして位置を調整するのではなく、螺旋軸12の回転により螺旋溝に係合するピン21、22を介して互いに筒状軸13に沿って接近及び離間する構成なので、押え板31及び押え板32の軸方向にずれようとする力に対して抗力が大きく、押え板31及び押え板32の位置が設定した位置から簡単にずれることがない。
【0036】
なお、ロール用紙セット軸30では押え板32を移動部材33の外周に取り付ける構造としたが、これに代え、移動部材の外周に倒立可能で立てた状態でロール用紙端面に当接できるような部材、又は出没自在な部材で出た状態でロール用紙端面に当接できる部材を設け、これを押え板としてもよい。
【0037】
また、筒状軸13もその断面形状が円形に限らず、例えば楕円等、搬送される用紙やセットされたロール用紙内径が滑りやすい形状であればよい。また、螺旋軸12の回転操作も操作つまみ14による操作に限定されるものではなく、六角レンチが嵌合する穴を他端に設け、該孔に六角レンチを嵌合させて回転するようにしてもよい。また、プリンタ本体側から設定データに従ってモータ駆動により、ロールセット軸と用紙ガイド軸を同時に調整するようにしてもよい。
【0038】
また、図1に示す用紙ガイドにおいて、ガイド板17、18を図10に示す構造の移動部材を用いても良い。
【0039】
図12は上記用紙ガイド10及びロール用紙セット軸30を取り付けるプリンタの概略構成例を示す図である。図示するようにプリンターの台板11に用紙ガイド10、ロール用紙セット軸30を取り付ける。40は印字ヘッド41やプラテン42からなる印字部、43は巻取軸、44はレバーである。用紙ガイド10とロール用紙セット軸30のセンタリングは印字部40の中心に合わせてある。上記構造のプリンタにおいて、レバー44を回して印字ヘッド41を上げて、用紙ガイド10、ロール用紙セット軸30を最大巾に広げた状態とし、ロール用紙セット軸30にロール用紙RWをセットする。その後、操作つまみ14を回転し(例えばCLOSEの方向に回転し)、上記センタリングを行う。
【0040】
ロール用紙RWはラベルが連続的に張付けられた用紙Wが巻回されたもので、ロール用紙RWより繰り出された用紙Wは用紙ガイド10に案内され、印字部40に導かれる。該印字部40では印字ヘッド41によりラベルに印字され、用紙Wがプラテン42の先端部で鋭角状に折り曲げられた状態で、ラベルは降りの用紙Wから剥離され、更に用紙Wは巻取軸43に巻き取られる。
【0041】
なお、本発明の用紙ガイド及びロール用紙セット軸を用いるプリンタはラベルプリンタに限定されるものではなく、カセット式プリンタのカセットやファックス、コピー機等、用紙のセンタリングを必要とするもの、ロール用紙のセンタリングを必要とするものに広く利用できる。
【0042】
【発明の効果】
以上説明したように本発明によれば下記のような優れた効果が得られる。
【0043】
請求項1又は2に記載の発明によれば、一対のガイド板又は一対の押え板の間隔を軸方向に互いに接近及び離間させて用紙幅又はロール用紙幅に合わせるセンタリング機構は、筒状軸内に収納しているので、操作等において邪魔になることがなく、センタリング作業が容易で、且つ精度のよいセンタリングを行うことができる。また、ガイド板又は押え板を直接操作して位置を調整するのではなく、螺旋軸の回転により螺旋溝に係合する突起部を介して互いに筒状軸に沿って接近及び離間する構成なので、ガイド板又は押え板の軸方向にずれようとする力に対して抗力が大きく、ガイド板又は押え板の位置が設定位置から簡単にずれることがない。また、筒状軸の略中央部に固定され螺旋軸の回転案内部に係合する係合部を設けたことにより、螺旋軸は筒状軸内で軸方向の位置が規制され、螺旋軸と筒状軸内の長さを無駄なく最大幅のロール用紙に対応させることができる。また、螺旋軸の略中央部は元々螺旋溝が不要な位置であるため、回転案内部や係合部からなる螺旋軸を回転案内する回転案内機構を設けても用紙ガイドの外観形状寸法に変化がなく、小型化が可能となる。
【0044】
(2)請求項2に記載の発明によれば、上記センタリング機構はロール用紙の内径孔に入るので、センタリング機構の配置スペースを特別設けることがなくなり、省スペース化が図れる。
【0045】
(3)請求項3に記載の発明によれば、台板側の反対側の押え部材は、移動部材に対して着脱自在な構成なので、この押え部材をロール用紙の内径よりも大きくすることで、ロール用紙の端面を確実に押えることができる。
【0046】
(4)請求項4又は請求項5に記載の発明によれば、上記センタリング機構が小型になるので、プリンタも小型化できる。
【図面の簡単な説明】
【図1】請求項1に記載の発明に係る用紙ガイドの構造を示す縦断面図である。
【図2】螺旋軸の螺旋軸部材の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は右側面図である。
【図3】螺旋軸の螺旋軸部材の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は右側面図である。
【図4】筒状軸の構造を示す図で、同図(a)は正面図、同図(b)は左側面図、同図(c)は同図(b)のA−A断面図である。
【図5】ガイド板の構造を示す図で、同図(a)は正面図、同図(b)は左側面図である。
【図6】操作つまみの構造を示す図で、同図(a)は一部断面正面図、同図(b)は左側面図である。
【図7】請求項2に記載の発明に係るロール用紙セット軸の構造を示す縦断面図である。
【図8】移動部材と押え板の係合状態を示す図である。
【図9】押え板の構造を示す図で、同図(a)は縦断面図、同図(b)は右側面図である。
【図10】移動部材の構造を示す図で、同図(a)は正面図、同図(b)は右側面図、同図(c)は平面図である。
【図11】押え板の構造を示す図で、同図(a)は縦断面図、同図(b)は左側面図、同図(c)は同図(a)のB−B断面図である。
【図12】プリンタの概略構成例を示す図である。
【符号の説明】
10 用紙ガイド
11 プリンターの台板
12 螺旋軸
12−1 螺旋軸部材
12−2 螺旋軸部材
13 筒状軸
14 操作つまみ
15 回転案内溝
16 ピン
17 ガイド板
18 ガイド板
21 ピン
22 ピン
30 ロール用紙セット軸
31 押え板
32 押え板
33 移動部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper guide for guiding paper fed out from roll paper used in a printer or the like, a roll paper set axis for setting the roll paper, and a printer having the paper guide or roll paper set axis.
[0002]
[Prior art]
In the printer using the roll paper as described above, it is preferable that the center line of the paper and the printing unit coincide with each other in the width direction because printing can be performed uniformly left and right across the paper center line. In particular, when using a thermal printer for the print unit, the paper is pressed by pushing the back of the print head with a spring, so if the center line of the print head and the center line of the paper are misaligned, There is a problem in that the printing pressure is different and the print density is uneven on the left and right.
[0003]
Conventionally, as a technique for matching the center line of the print head with the center line of the paper, there is one disclosed in Japanese Patent Laid-Open No. 62-83958. In this technology, a holding member that holds both ends of the roll paper is supported by an external X-shaped lever, and the intersection of the lever is supported by a printer body with a pin. If one of the holding members is moved, the other moves in the opposite direction and can be centered. It is comprised as follows.
[0004]
[Problems to be solved by the invention]
However, the above technique has a problem that it is difficult to reduce the size of the X-shaped lever, and it becomes an obstacle. Therefore, there is a method of manually moving each of the members in contact with both ends of the roll paper according to the scale and centering them without connecting them, but there is a problem in workability and centering accuracy. The latter method is also used as a paper guide for a printer that handles continuous paper, but has the same problem as described above.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described points. A sheet guide, a roll sheet setting shaft, and a centering member that do not interfere with the roll sheet set, are small in size, have high centering accuracy, and can be easily centered. It is an object of the present invention to provide a printer using the paper guide and roll paper set shaft.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a shaft having one end fixed to the base plate, and a paper guide that regulates the position in the width direction of the paper transported on the shaft. A spiral groove that is rotatable and has a spiral direction opposite to each other from an approximately central position in the axial direction is provided, and a spiral shaft that is provided with a rotation guide portion in the circumferential direction of the substantially central portion, and the spiral shaft is accommodated, An opening extending in the axial direction is formed at a predetermined position, and one end is fixed to the base plate, and an engagement portion is fixed to a substantially central portion of the cylindrical shaft and engages with a rotation guide portion of the spiral shaft. And a hole through which the cylindrical shaft penetrates at the center, and a protrusion that engages with the spiral groove of the spiral shaft through the opening of the cylindrical shaft, and engages with the spiral groove by rotation of the spiral shaft this provided with a pair of guide plates toward and spaced apart along the tubular shaft to each other via the protrusion The features.
[0007]
According to a second aspect of the present invention, there is provided a roll paper setting shaft for inserting a shaft having one end fixed to the base plate into the center hole of the roll paper, and regulating the position in the width direction of the roll paper. A spiral groove having a spiral direction opposite to each other is provided from an approximately central position in the axial direction, and a spiral shaft provided with a rotation guide portion in the circumferential direction of the substantially central portion, and the spiral shaft is accommodated, and a predetermined outer circumference is provided. An opening extending in the axial direction is formed at a position, and a cylindrical shaft whose one end is fixed to the base plate, and an engaging portion fixed to a substantially central portion of the cylindrical shaft and engaged with a rotation guide portion of the helical shaft And a protrusion that engages with the spiral groove of the spiral shaft through the opening of the cylindrical shaft, and that engages with the spiral groove by rotation of the spiral shaft. a pair of pressing members toward and spaced apart along the tubular shaft to one another via a section, with a And wherein the door.
[0008]
According to a third aspect of the present invention, in the roll paper set shaft according to the second aspect, the holding member on the opposite side of the base plate side includes a protrusion that engages with the spiral groove of the spiral shaft, and the axial direction And a presser plate detachably attached to the moving member.
[0009]
According to a fourth aspect of the present invention, there is provided a printer comprising the paper guide according to the first aspect.
[0010]
According to a fifth aspect of the present invention, there is provided a printer comprising the roll paper set shaft according to the second or third aspect.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the structure of a paper guide according to the first aspect of the present invention. In FIG. 1, reference numeral 11 denotes a printer base plate to which the paper guide 10 is attached. The paper guide 10 includes a helical shaft 12 and a cylindrical shaft 13 in which the helical shaft 12 is accommodated. One end is fixed to the base plate 11. The spiral shaft 12 is a spiral shaft provided with spiral grooves whose spiral directions are opposite to each other from about the center position in the axial direction, and two grooves are provided for each spiral direction, and is cylindrical. The shaft 13 is rotatably arranged.
[0012]
A rotation guide groove 15 is provided at a substantially central portion of the spiral shaft 12, and a tip end portion of a pin 16 fixed to the center portion of the cylindrical shaft 13 is engaged in the rotation guide groove 15. An operation knob 14 is fixed to the other end of the spiral shaft. By rotating the operation knob 14, the rotation guide groove 15 of the spiral shaft 12 is guided by the pin 16 to rotate.
[0013]
Reference numeral 17 is a guide plate on the base plate 11 side, and 18 is a guide plate on the operation knob 14 side. Each of the guide plates 17 and 18 is formed with a hole having a diameter through which the cylindrical shaft 13 penetrates at the center thereof. As will be described later in detail, each of the guide plates 17 and 18 protrudes from the inner wall surface of the hole into openings 13d and 13e provided on the outer peripheral portion of the cylindrical shaft 13, and the tip portion of the guide plates 17 and 18 is a spiral of the spiral shaft 12. Pins (projections) 21 and 22 that engage with the grooves are provided.
[0014]
In the paper guide 10 having the above structure, when the operation knob 14 is rotated and the spiral shaft 12 is rotated, the guide plates 17 and 18 are mutually connected to the cylinder via the pins 21 and 22 engaged with the spiral groove according to the rotation direction. It moves so as to approach or separate along the axis 13. Accordingly, the operation knob 14 is rotated according to the width of the paper W conveyed between the pair of guide plates 17 and 18, and the guide plates 17 and 18 are moved closer to or away from each other, thereby centering the paper W. It can be performed easily and accurately. Hereinafter, the configuration of each component constituting the paper guide will be described.
[0015]
The helical shaft 12 includes a helical shaft member 12-1 on the base plate 11 side of the printer and a helical shaft member 12-2 on the operation knob 14 side. 2A and 2B are views showing the structure of the spiral shaft member 12-1 on the base plate 11 side of the printer. FIG. 2A is a front view, FIG. 2B is a left side view, and FIG. FIG. 3A and 3B are views showing the structure of the helical shaft member 12-2 on the operation knob 14 side. FIG. 3A is a front view, FIG. 3B is a left side view, and FIG. 3C is a right side view. is there.
[0016]
As shown in FIG. 2, the spiral shaft member 12-1 on the side of the base plate 11 has a hole 12-1 d having a predetermined dimension in the axial direction from one end in the center, and a predetermined dimension in the axial direction from the one end. Spiral grooves 12-1a and 12-1a ′, small diameter portions 12-1e having a predetermined dimension are formed in the axial direction from the ends of the spiral grooves 12-1a and 12-1a ′, and the small diameter portions 12-1e are further formed. Two large-diameter flange portions 12-1b and 12-1c for forming the rotation guide groove 15 are formed at the end, and a small-diameter protruding portion 12-1f is formed at the other end.
[0017]
The helical shaft member 12-2 on the operation knob 14 side has a small-diameter portion 12-2b having a predetermined dimension in the axial direction from one end, and spiral grooves 12-2a and 12-1a from the terminal end to the other end of the small-diameter portion 12-2b. 'Is formed, and a hole 12-2c having a predetermined dimension is formed in the central portion in the axial direction from one end to the other end. The inner diameter of the hole 12-2c is large enough to fit the protruding portion 12-1f at the other end of the helical shaft member 12-1. On the other end surface of the spiral shaft member 12-1, a pair of fitting protrusions 12-2d that fit into the holes of the operation knob 14 are provided.
[0018]
The spiral shaft 12 is inserted into the protrusion 12-1f at the other end of the spiral shaft member 12-1, and the spiral shaft member 12-2 is inserted into the hole 12-2c at one end, and the small-diameter portion 12-2b of the spiral shaft member 12-2 is inserted. The helical shaft member 12-1 and the helical shaft member 12-2 are connected by fitting a pin into the pin hole 12-2e and the pin hole 12-1g of the protruding portion 12-1f of the helical shaft member 12-1. Is done. Thereby, the spiral grooves 12-1a and 12-1a ′ of the spiral shaft member 12-1 and the spiral grooves 12-2a and 12-2a ′ of the spiral shaft member 12-2 are opposite to each other.
[0019]
4A and 4B are views showing the structure of the cylindrical shaft 13. FIG. 4A is a front view, FIG. 4B is a left side view, and FIG. 4C is a cross-sectional view taken along the line AA in FIG. It is. The cylindrical shaft 13 is made of a cylindrical member having an inner diameter that can accommodate the helical shaft 12, and has one end closed by a closing portion 13a and the other end opened. On the inner surface of the closed portion 13a at one end, a spiral shaft support protrusion 13b is formed which is inserted into the hole 12-1d of the spiral shaft member 12-1 constituting the spiral shaft 12. Further, a screw hole 13c for fixing one end of the cylindrical shaft 13 to the base plate 11 is formed in the closing portion 13a.
[0020]
Further, openings 13 d and 13 e extending in the axial direction are formed at predetermined positions on the outer periphery of the cylindrical shaft 13. The openings 13d and 13e face the spiral grooves 12-1a and 12-1a ′ of the spiral shaft member 12-1 and the spiral grooves 12-2a and 12-2a ′ of the spiral shaft member 12-2, respectively, and are approximately the same in size. Are equal. In addition, a pair of holes 13 f are provided on the outer periphery of the central portion of the cylindrical shaft 13 to fit the pins 16 whose tips engage with the rotation guide grooves 15 of the spiral shaft 12.
[0021]
5A and 5B are views showing the structure of the guide plate 17, wherein FIG. 5A is a front view and FIG. 5B is a left side view. Since the guide plate 18 has substantially the same structure as the guide plate 17, its description is omitted. A hole 17a through which the cylindrical shaft 13 passes is formed at the center of the guide plate 17, a flange portion 17b having a guide surface 17c for guiding the edge of the paper W is formed at one end, and the other end is a small diameter portion. 17d. At a predetermined position of the small-diameter portion 17d, holes 17e are formed in the front and rear to receive the pins 21 whose front ends engage with the spiral grooves 12-1a and 12-1a ′ of the spiral shaft member 12-1. . Therefore, the guide plate 17 can move smoothly according to the rotation of the spiral shaft 12.
[0022]
6A and 6B are diagrams showing the structure of the operation knob 14, wherein FIG. 6A is a partially sectional front view, and FIG. 6B is a left side view. As shown in the figure, the operation knob 14 has a disk shape, and a pair of insertion holes 14a for fitting the fitting projections 12-2d at the other end of the helical shaft member 12-2 constituting the helical shaft 12 are formed on one side surface thereof. The other side surface is provided with an arrow 14b or the like indicating the rotational direction in which the guide plates 17 and 18 approach each other.
[0023]
In assembling the paper guide having the above structure, first, one end of the cylindrical shaft 13 is fixed to the base plate 11 of the printer with screws 23. Next, the spiral shaft 12 is accommodated in the cylindrical shaft 13 so that the spiral shaft support protrusion 13b of the closing portion 13a is inserted into the hole 12-1d at one end of the spiral shaft member 12-1. Subsequently, the pin 16 is fitted into the pair of holes 13 f of the cylindrical shaft 13 and the tip thereof is engaged with the rotation guide groove 15 of the spiral shaft 12. Next, the cylindrical shaft 13 is inserted into a hole provided in the central portion of the guide plates 17 and 18, and the tips of the spiral grooves 12-1a and 12-1a ′ of the spiral shaft member 12-1 and the spiral shaft member are inserted. The pin 21 and the pin 22 that engage with the spiral grooves 12-2a and 12-2a ′ of 12-2 are fitted, and the guide plate 17 and the guide plate 18 are attached. Thereafter, the operation knob 14 is attached by fitting the fitting protrusion 12-2d of the helical shaft member 12-2 constituting the helical shaft 12 into the fitting hole 14a.
[0024]
The centering mechanism that adjusts the width of the paper W by moving the distance between the pair of guide plates 17 and the guide plate 18 closer to and away from each other in the axial direction by accommodating the paper guide in the above structure is accommodated in the cylindrical shaft 13. Therefore, the centering operation is easy and accurate centering can be performed without any hindrance in operation and the like. Rather than directly moving the guide plate 17 and the guide plate 18 to adjust the position, the rotation and rotation of the spiral shaft 12 causes the pins 21 and 22 to engage with the spiral groove to approach and separate from each other along the cylindrical shaft 13. Since it is a structure, there is a large resistance against the force of the guide plate 17 and the guide 18 that are displaced in the axial direction, and the guide plate 17 and the guide position 18 do not easily deviate from the set positions.
[0025]
7 and 8 are views showing the structure of the roll paper set shaft according to the second aspect of the invention. FIG. 7 is a longitudinal sectional view, and FIG. 8 is a view showing the engagement state of the moving member 33 and the presser plate 32. It is. 7 and 8, the same reference numerals as those in FIGS. 1 to 6 denote the same or corresponding parts. Reference numeral 11 denotes a printer base plate to which the roll paper set shaft 30 is attached. The roll paper set shaft 30 includes a spiral shaft 12 and a cylindrical shaft 13 in which the spiral shaft 12 is accommodated. One end is fixed to the base plate 11 with screws 23 and 23. The spiral shaft 12 is a spiral shaft provided with spiral grooves 12-1a, 12-1a ′ and 12-2a, 12-2a ′ whose spiral directions are opposite to each other from an approximately central position in the axial direction. The shaft 13 is rotatably arranged.
[0026]
A rotation guide groove 15 is provided at a substantially central portion of the spiral shaft 12, and a tip end portion of a pin 16 fixed to the center portion of the cylindrical shaft 13 is engaged with the rotation guide groove 15. Yes. By rotating an operation knob 14 fixed to the other end of the spiral shaft 12, the spiral guide 12 rotates with the rotation guide groove 15 guided by the pin 16.
[0027]
Reference numeral 31 denotes a press plate on the base plate 11 side, and 32 denotes a press plate on the operation knob 14 side. The presser plate 31 is formed with a hole having a diameter through which the cylindrical shaft 13 penetrates in the center, and the presser plate 31 is provided on the outer peripheral portion of the cylindrical shaft 13 from the inner wall surface of the hole, as will be described in detail later. A pin (protrusion) 21 is provided that protrudes into the opening 13d and whose tip engages with the spiral grooves 12-1a and 12-1a ′ of the spiral shaft 12. As will be described later in detail, the presser plate 32 engages with the outer peripheral portion of the moving member 33 and moves in conjunction with the movement of the moving member 33 in the axial direction. Similarly to the guide plate 18, the moving member 33 is formed with a hole having a diameter through which the cylindrical shaft 13 penetrates, and an opening provided on the outer peripheral portion of the cylindrical shaft 13 from the inner wall surface of the hole. Pins (protrusions) 22 are provided on the front and rear sides that protrude to 13e and whose front ends engage with the spiral grooves 12-2a and 12-2a ′ of the spiral shaft 12.
[0028]
When the operation knob 14 is rotated and the spiral shaft 12 is rotated in the roll paper setting shaft 30 having the above structure, the spiral grooves 12-1a, 12-1a ′ and 12-2a, 12-2a ′ are engaged with each other depending on the rotation direction. The presser plate 31 and the presser plate 32 smoothly move so as to approach or separate from each other along the cylindrical shaft 13 via the pins 21 and 22 to be joined. Therefore, the center of the roll paper that allows the press plates 31 and 32 to approach or separate from each other by rotating the operation knob 14 according to the width of the roll paper set between the pair of press plates 31 and 32 is easy. And can be performed with high accuracy. Hereinafter, the configuration of each component constituting the paper guide will be described.
[0029]
Since the structure of the spiral shaft 12 is the same as that of the paper guide shown in FIGS. The operation knob 14 is the same as that of the paper guide shown in FIG.
[0030]
9A and 9B are diagrams showing the structure of the presser plate 31, wherein FIG. 9A is a longitudinal sectional view and FIG. 9B is a right side view. The presser plate 31 has a rectangular shape with arcs at both ends. A hole 31a through which the cylindrical shaft 13 passes is formed at the center, and four ribs 31b with which the end surface of the roll paper abuts are formed on one surface. A small-diameter portion 31c having a predetermined thickness is formed on the outer peripheral portion of the hole 31a on the opposite surface, and the tips of the spiral grooves 12-1a and 12-1a of the spiral shaft member 12-1 are formed at predetermined positions of the small-diameter portion 31c. Two holes 31d into which the pins 21 engaging with 'are inserted are symmetrically formed.
[0031]
10A and 10B are views showing the structure of the moving member 33. FIG. 10A is a front view, FIG. 10B is a right side view, and FIG. 10C is a plan view. The moving member 33 has a disc shape, and a hole 33a through which the cylindrical shaft 13 passes is formed at the center. A flange portion 33c having a contact surface 33b with which the end surface of the roll paper contacts is formed at one end. A total of four protrusions 33d and 33d with which the presser plate 32 engages are provided at the end, and an engagement pin of the presser plate 32, which will be described in detail later, is provided between the pair of engagement protrusions 33d and 33d. A pin fitting groove 33e is formed, and a groove 33f is formed between the flange portion 33c and the protruding portion 33d to engage the guide piece of the holding plate 32. Further, two holes 33g are formed symmetrically at predetermined positions of the moving member 33 into which the pins 22 whose tips engage with the spiral grooves 12-2a and 12-2a ′ of the spiral shaft member 12-2 are inserted. Yes.
[0032]
11A and 11B are views showing the structure of the presser plate 32. FIG. 11A is a front sectional view (A-A section of FIG. 11B), FIG. 11B is a left side view, and FIG. These are BB sectional drawing of the same figure (b). The presser plate 32 has a rectangular shape in which both ends have an arc shape, and a hole 32a for accommodating the moving member 33 is formed at the center thereof. A pair of engagement pins 32b and 32b are formed on the inner surface of the hole 32a so as to face each other. A pair of guide pieces 32c and 32c are provided on both sides of the engaging pins 32b and 32b with a predetermined gap. In addition, four ribs 32d are formed on one surface of the pressing plate 32 so that the end surface of the roll paper comes into contact therewith.
[0033]
In assembling the roll paper set shaft having the above structure, first, one end of the cylindrical shaft 13 is fixed to the base plate 11 of the printer with a screw 23. Next, the spiral shaft 12 is accommodated in the cylindrical shaft 13 so that the spiral shaft support protrusion 13b of the closing portion 13a is inserted into the hole 12-1d at one end of the spiral shaft member 12-1. Subsequently, the pin 16 is fitted into the pair of holes 13 f of the cylindrical shaft 13, and the tip thereof is engaged with the rotation guide groove 15 of the spiral shaft 12. Next, the cylindrical shaft 13 is inserted into the hole 31a provided in the center portion of the presser plate 31, and the tip engages with the spiral grooves 12-1a and 12-1a ′ of the spiral shaft member 12-1. 21 is inserted and the presser plate 31 is attached.
[0034]
Next, the movable shaft 33 is inserted into the hole 33a provided at the center thereof, and the cylindrical shaft 13 is inserted, and the tip engages with the spiral grooves 12-2a and 12-2a ′ of the spiral shaft member 12-2. The moving member 33 is attached by inserting 22 respectively. Subsequently, the engagement pin 32b of the hole 32a of the holding plate 32 and the portion with the guide piece 32c are aligned with the portion of the outer periphery of the moving member 33 where the protruding portion 33d is not provided, and the outer periphery of the moving member 33 is inserted into the hole 32a. Thereafter, the presser plate 32 is rotated until the engaging pin 32b and the guide piece 32c of the presser plate 32 pass through the groove 33f of the moving member 33 and the engaging pins 32b and 32b are engaged with the grooves 33e and 33e. 32 is attached to the moving member. Thereafter, the operation knob 14 is attached by fitting the fitting protrusion 12-2d of the helical shaft member 12-2 of the helical shaft 12 into the fitting hole 14a.
[0035]
A centering mechanism for adjusting the width of the roll paper by making the interval between the pair of presser plates 31 and the presser plates 32 close to and away from each other in the axial direction by the roll paper set shaft 30 having the above structure is provided in the cylindrical shaft 13. Since it is housed, the centering operation is easy and accurate centering can be performed without any hindrance in operation or the like. The position is not adjusted by directly moving the presser plate 31 and the presser plate 32, but is moved toward and away from each other along the cylindrical shaft 13 via the pins 21 and 22 engaged with the spiral groove by the rotation of the spiral shaft 12. Since it is a structure, a drag force is large with respect to the force which tends to shift to the axial direction of the presser plate 31 and the presser plate 32, and the position of the presser plate 31 and the presser plate 32 does not deviate easily from the set position.
[0036]
The roll paper setting shaft 30 has a structure in which the presser plate 32 is attached to the outer periphery of the moving member 33. Instead of this, a member that can come into contact with the end surface of the roll paper while standing upright on the outer periphery of the moving member. Alternatively, a member that can come into contact with the end face of the roll paper in a state where it protrudes by a freely movable member may be provided and used as a presser plate.
[0037]
Further, the cylindrical shaft 13 is not limited to a circular cross section, and may be any shape as long as the conveyed paper and the set roll paper inner diameter are slippery, such as an ellipse. Further, the rotation operation of the spiral shaft 12 is not limited to the operation by the operation knob 14, and a hole for fitting the hexagon wrench is provided at the other end, and the hexagon wrench is fitted into the hole so as to rotate. Also good. Further, the roll set shaft and the paper guide shaft may be adjusted simultaneously by driving the motor according to the setting data from the printer main body side.
[0038]
In the paper guide shown in FIG. 1, the guide plates 17 and 18 may be moving members having the structure shown in FIG.
[0039]
FIG. 12 is a diagram showing a schematic configuration example of a printer to which the paper guide 10 and the roll paper setting shaft 30 are attached. As shown in the figure, a paper guide 10 and a roll paper setting shaft 30 are attached to the base plate 11 of the printer. Reference numeral 40 denotes a printing unit including a print head 41 and a platen 42, 43 denotes a winding shaft, and 44 denotes a lever. The centering of the paper guide 10 and the roll paper setting shaft 30 is aligned with the center of the printing unit 40. In the printer having the structure described above, the lever 44 is rotated to raise the print head 41 so that the paper guide 10 and the roll paper setting shaft 30 are widened to the maximum width, and the roll paper RW is set on the roll paper setting shaft 30. Thereafter, the operation knob 14 is rotated (for example, rotated in the CLOSE direction) to perform the centering.
[0040]
The roll paper RW is a roll of paper W with labels continuously attached. The paper W fed out from the roll paper RW is guided by the paper guide 10 and guided to the printing unit 40. In the printing unit 40, the label is printed by the print head 41, the label is peeled off from the descending paper W in a state where the paper W is bent at an acute angle at the tip of the platen 42, and the paper W is further taken up by the winding shaft 43. Rolled up.
[0041]
The printer using the paper guide and roll paper set axis of the present invention is not limited to a label printer, but a cassette type printer cassette, fax machine, copier, or the like that requires paper centering, roll paper It can be widely used for those that require centering.
[0042]
【The invention's effect】
As described above, according to the present invention, the following excellent effects can be obtained.
[0043]
According to the first or second aspect of the invention, the centering mechanism that adjusts the distance between the pair of guide plates or the pair of pressing plates to the paper width or the roll paper width in the axial direction by approaching and separating from each other is provided in the cylindrical shaft. Therefore, the centering operation is easy and the centering can be performed with high accuracy. Also, instead of directly operating the guide plate or the presser plate to adjust the position, it is configured to approach and separate from each other along the cylindrical shaft via a protrusion that engages with the spiral groove by rotation of the spiral shaft. The drag force is large against the force that tends to shift in the axial direction of the guide plate or presser plate, and the position of the guide plate or presser plate does not easily deviate from the set position. In addition, by providing an engaging portion that is fixed to a substantially central portion of the cylindrical shaft and engages with the rotation guide portion of the helical shaft, the position of the helical shaft in the axial direction is regulated within the cylindrical shaft, The length in the cylindrical shaft can be made to correspond to the maximum width roll paper without waste. In addition, since the spiral groove is originally unnecessary at the substantially central portion of the spiral shaft, the appearance and dimensions of the paper guide change even if a rotation guide mechanism that rotates and guides the spiral shaft including the rotation guide portion and the engagement portion is provided. There is no need to reduce the size.
[0044]
(2) According to the invention described in claim 2, since the centering mechanism enters the inner diameter hole of the roll paper, no special space for arranging the centering mechanism is provided, and the space can be saved.
[0045]
(3) According to the invention described in claim 3, since the pressing member on the side opposite to the base plate side is detachable from the moving member, the pressing member is made larger than the inner diameter of the roll paper. The end face of the roll paper can be securely pressed.
[0046]
(4) According to the invention described in claim 4 or claim 5, since the centering mechanism becomes small, the printer can also be miniaturized.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a structure of a paper guide according to the first aspect of the present invention.
2A and 2B are diagrams showing the structure of a helical shaft member of a helical shaft, where FIG. 2A is a front view, FIG. 2B is a left side view, and FIG. 2C is a right side view.
3A and 3B are diagrams showing the structure of a helical shaft member of a helical shaft, where FIG. 3A is a front view, FIG. 3B is a left side view, and FIG. 3C is a right side view.
4A is a front view, FIG. 4B is a left side view, and FIG. 4C is a cross-sectional view taken along line AA in FIG. 4B. It is.
5A and 5B are diagrams showing the structure of a guide plate, where FIG. 5A is a front view and FIG. 5B is a left side view.
6A and 6B are diagrams showing a structure of an operation knob, where FIG. 6A is a partially sectional front view, and FIG. 6B is a left side view.
FIG. 7 is a longitudinal sectional view showing the structure of a roll paper set shaft according to the second aspect of the present invention.
FIG. 8 is a diagram illustrating an engagement state between a moving member and a presser plate.
FIGS. 9A and 9B are diagrams showing the structure of the presser plate, where FIG. 9A is a longitudinal sectional view, and FIG. 9B is a right side view.
10A and 10B are diagrams showing the structure of a moving member, where FIG. 10A is a front view, FIG. 10B is a right side view, and FIG. 10C is a plan view.
11A is a longitudinal sectional view, FIG. 11B is a left side view, and FIG. 11C is a BB sectional view of FIG. 11A. It is.
FIG. 12 is a diagram illustrating a schematic configuration example of a printer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Paper guide 11 Printer base plate 12 Spiral shaft 12-1 Spiral shaft member 12-2 Spiral shaft member 13 Cylindrical shaft 14 Operation knob 15 Rotation guide groove 16 Pin 17 Guide plate 18 Guide plate 21 Pin 22 Pin 30 Roll paper set Shaft 31 Presser plate 32 Presser plate 33 Moving member

Claims (5)

一端を台板に固定した軸を具備し、該軸上を搬送される用紙の幅方向の位置を規制する用紙ガイドにおいて、
前記軸は、回転可能で且つ軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋状溝を設けると共に、略中央部の周方向に回転案内部を設けた螺旋軸と、
前記螺旋軸を収納し、外周の所定位置に軸方向に伸びる開口部が形成され、且つ一端が前記台板に固定する筒状軸と、
前記筒状軸の略中央部に固定され前記螺旋軸の回転案内部に係合する係合部と、
中心部に前記筒状軸が貫通する穴が形成されると共に、前記筒状軸の開口部を通して前記螺旋軸の螺旋溝に係合する突起部を備え、前記螺旋軸の回転により螺旋溝に係合する突起部を介して互いに該筒状軸に沿って接近及び離間する一対のガイド板と、
を備えたことを特徴とする用紙ガイド。
In a paper guide that includes a shaft having one end fixed to the base plate and regulates the position in the width direction of the paper conveyed on the shaft,
The shaft is rotatable and provided with a spiral groove having a spiral direction opposite to each other from an approximately central position in the axial direction, and a spiral shaft provided with a rotation guide portion in the circumferential direction of the substantially central portion;
A cylindrical shaft that houses the helical shaft, has an opening extending in the axial direction at a predetermined position on the outer periphery, and has one end fixed to the base plate;
An engaging portion fixed to a substantially central portion of the cylindrical shaft and engaged with a rotation guide portion of the helical shaft;
A hole through which the cylindrical shaft passes is formed at the center, and a projection is provided that engages with the spiral groove of the spiral shaft through the opening of the cylindrical shaft, and is engaged with the spiral groove by rotation of the spiral shaft. A pair of guide plates approaching and separating from each other along the cylindrical axis via mating protrusions ;
A paper guide characterized by comprising:
ロール用紙の中心穴に一端を台板に固定した軸を挿入し、該ロール用紙の幅方向の位置を規制するロール用紙セット軸において、
前記軸は、回転可能で且つ軸方向の約中央位置から互いに螺旋方向が逆方向の螺旋状溝を設けると共に、略中央部の周方向に回転案内部を設けた螺旋軸と、
前記螺旋軸を収納し、外周の所定位置に軸方向に伸びる開口部が形成され、且つ一端が前記台板に固定する筒状軸と、
前記筒状軸の略中央部に固定され前記螺旋軸の回転案内部に係合する係合部と、
中心部に前記筒状軸が貫通する穴が形成されると共に、前記筒状軸の開口部を通して前記螺旋軸の螺旋溝に係合する突起部を備え、前記螺旋軸の回転により螺旋溝に係合する突起部を介して互いに該筒状軸に沿って接近及び離間する一対の押え部材と、
を備えたことを特徴とするロール用紙セット軸。
In the roll paper set shaft that inserts a shaft with one end fixed to the base plate in the center hole of the roll paper and regulates the position in the width direction of the roll paper,
The shaft is rotatable and provided with a spiral groove having a spiral direction opposite to each other from an approximately central position in the axial direction, and a spiral shaft provided with a rotation guide portion in the circumferential direction of the substantially central portion;
A cylindrical shaft that houses the helical shaft, has an opening extending in the axial direction at a predetermined position on the outer periphery, and has one end fixed to the base plate;
An engaging portion fixed to a substantially central portion of the cylindrical shaft and engaged with a rotation guide portion of the helical shaft;
A hole through which the cylindrical shaft passes is formed at the center, and a projection is provided that engages with the spiral groove of the spiral shaft through the opening of the cylindrical shaft, and is engaged with the spiral groove by rotation of the spiral shaft. A pair of presser members that approach and separate from each other along the cylindrical axis via mating protrusions ;
A roll paper set shaft characterized by comprising:
前記台板側の反対側の押え部材は、前記螺旋軸の螺旋溝に係合する突起部を具備し軸方向に移動可能な移動部材と、
前記移動部材に対して着脱自在な押え板とを具備することを特徴とする請求項2に記載のロール用紙セット軸。
The holding member on the opposite side of the base plate side includes a projecting portion that engages with the spiral groove of the spiral shaft, and a movable member that is movable in the axial direction.
The roll paper set shaft according to claim 2, further comprising a presser plate that is detachable with respect to the moving member.
前記請求項1に記載の用紙ガイドを具備することを特徴とするプリンタ。A printer comprising the paper guide according to claim 1. 前記請求項2又は3に記載のロール用紙セット軸を具備することを特徴とするプリンタ。A printer comprising the roll paper set shaft according to claim 2.
JP32536397A 1997-11-11 1997-11-11 Paper guide, roll paper set shaft and printer Expired - Fee Related JP3840766B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32536397A JP3840766B2 (en) 1997-11-11 1997-11-11 Paper guide, roll paper set shaft and printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32536397A JP3840766B2 (en) 1997-11-11 1997-11-11 Paper guide, roll paper set shaft and printer

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Publication Number Publication Date
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JP3840766B2 true JP3840766B2 (en) 2006-11-01

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ID=18175999

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432362B1 (en) * 2011-06-29 2014-08-20 후지쯔 콤포넌트 가부시끼가이샤 Printer apparatus

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US8568046B2 (en) 2007-09-17 2013-10-29 Avery Dennison Corporation Mounting assembly and method of loading and/or unloading rolls
JP2009107773A (en) * 2007-10-30 2009-05-21 Mitsubishi Electric Corp Printer device
CN105437787B (en) * 2015-12-14 2018-02-23 广州市宝比万像科技有限公司 Spool and printer
JP2020164296A (en) * 2019-03-29 2020-10-08 富士通コンポーネント株式会社 Printer device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432362B1 (en) * 2011-06-29 2014-08-20 후지쯔 콤포넌트 가부시끼가이샤 Printer apparatus

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