JP4204850B2 - Chair - Google Patents

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Publication number
JP4204850B2
JP4204850B2 JP2002335774A JP2002335774A JP4204850B2 JP 4204850 B2 JP4204850 B2 JP 4204850B2 JP 2002335774 A JP2002335774 A JP 2002335774A JP 2002335774 A JP2002335774 A JP 2002335774A JP 4204850 B2 JP4204850 B2 JP 4204850B2
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Japan
Prior art keywords
support member
chair
turning radius
chair body
rotation
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JP2002335774A
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Japanese (ja)
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JP2004166935A (en
Inventor
晃之 木村
進 中島
正春 小泉
真弥 野口
泰久 松尾
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Kokuyo Co Ltd
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Kokuyo Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、例えば、不使用時に、座部を有する椅子本体を机等に近接した所定の前傾収納位置にまで自動的に回動退避し得るようにした椅子に適用されるものである。
【0002】
【従来の技術】
従来、学校や企業の講義室等においては、座部を有する椅子本体を、支持手段である脚を用いて床に固定されたベース部材に支持させ、そのベース部材に設けたばね等により前記椅子本体を前方に回動付勢している椅子が使用されている。この椅子は、非着座時に前方に回動退避している椅子本体を、座部が略水平になる使用位置にまで引き戻して着座することができるようにしたものである。すなわち、この椅子は、不使用時には、椅子本体が自動的に前傾収納位置にまで回動退避して、例えば、座の前縁側が机の天板下方に格納されるとともに、背もたれが前記天板に近接または当接することになり、その椅子本体が通行や掃除の時に邪魔にならないように考えられたものである。(例えば、特許文献1参照)
【0003】
【特許文献1】
特開平11−216081号公報(第3頁、段落番号0017図5)
【0004】
【発明が解決しようとする課題】
しかし、上記のような椅子は、一定の長さを有する脚の上端部を前記椅子本体に、下端部を前記ベース本体に前後回動可能に枢支させることで、椅子本体を前後回動可能としているため、その回動半径は脚の長さに拘束されると共に、その回動軌跡が限られたものとなってしまう。従って、使用者は、椅子の収納時や着座時、更には椅子の後方を通過する際など椅子本体を様々な状況に応じた最適な座面角度を形成したり、椅子本体を最適な位置に配すことができず、使い勝手の悪いものとなっていた。
【0005】
そこで本願発明は、上記課題を有利に解決した椅子を提供することを目的とするものであり、少なくとも座部を有する椅子本体と、この椅子本体の下方に設けられ、前記座部を回動可能に支持する支持手段とを具備する椅子において、前記支持手段を、前記座部の前方を前後回動可能に支持する前支持部材と、この座部の後方を前後回動可能に支持する後支持部材とから構成すると共に、この前支持部材又は後支持部材の回動半径を調整する回動半径調節手段とを具備し、前記後支持部材を後傾させることにより後支持部材が動作範囲における後端となった時に後支持部材の回動半径を調整して椅子本体を着座位置に保持し得るものであって、椅子本体を前方へ移動させる際に座ブラケット側に設けたストッパと後支持部材の上端に設けた前回動規制アームとを当接させることによって前記座ブラケットに対する前記後支持部材の前回動を規制することにより回動半径を調整した回動半径調節手段とともに前記椅子本体を前記着座位置と同じ座面角度に保持し得る前回動規制手段とを具備し、この回動半径調節手段を用いて前記前支持部材と前記後支持部材との相対的な回動半径を変更可能に構成したことを特徴とする。
【0006】
かかる椅子にあっては、椅子本体の回動軌跡に自由度が生まれ、例えば使用者が座部に座り込む際には、椅子本体を前後支持部材にて非平行状態で支持し、椅子後方のスペースを生かしてより後方に椅子本体を引くことで、座り込む空間を十分に確保することができる。また、座面角度を座り込み易い角度に前傾させるなど、椅子の使用状況に応じて使い勝手の配置や座面角度に変化させることができる。
【0007】
更に、容易に椅子本体を最適な態様とするためには、回動半径調節手段を、椅子本体に掛けた荷重に応じて前支持部材と後支持部材との相対的な回動半径を変更可能なものに構成することが望ましい。
【0008】
また、後支持部材を相対回動可能な上リンク要素と下リンク要素とから構成することで、簡易な構造にて前後支持部材の相対的な回動半径を変更できると共に、例えば下リンク要素の下端部を床等に固定したベース部材に取り付けた構成とすることで、椅子本体を強く引いた際などにも安定した使用状態を確保することができる。
【0009】
加えて、椅子本体の前回動を規制する前回動規制手段を設けることで、例えば、椅子の収納時などに椅子本体が最適な態様となるように前回動する範囲を規制しておき、椅子の使用状況に応じた最適な態様を容易且つ確実に実現することができる。
【0010】
具体的には、前回動規制手段を、座の下方に設けたストッパと、支持部材の上端部に設けた前回動規制アームとから構成し、この前回動規制アームを前記ストッパに当接させることにより前回動を規制することが望ましい。
【0011】
また、椅子本体の後回動を規制する後回動規制手段を設けることで、例えば、椅子本体を後方に引く時などに後方に設けた机などにぶつからない様後回動する範囲を規制しておき、椅子の使用状況に応じた最適な態様を容易且つ確実に実現することができる。
【0012】
具体的には、後回動規制手段を、床等に固定されたストッパと、支持部材の下端部に設けた後回動規制アームとから構成し、この後回動規制アームを前記ストッパに当接させて規制することが考えられる。
【0013】
【発明の実施の形態】
以下、本発明の一実施の形態を、図面を参照して説明する。
【0014】
図1は、机Tと複数の椅子Iとを配置した斜視図であり、図2は、椅子Iの分解斜視図を示している。
【0015】
本実施の形態における椅子Iは、学校等で講義等を行う場合の講義用の机Tと組み合わせて利用されるものであり、前記机Tと椅子Iを、前後方向に列をなすように複数個交互に配置してなるものであり、巾方向に沿って複数人数分の椅子Iを配置して使用される。
【0016】
以下、各構成について詳述する。
【0017】
この椅子Iは、座部12を有する椅子本体1と、この椅子本体1を、前後方向に回動可能に支持する支持手段Sとを具備してなる。そして、前記支持手段Sを用いて椅子本体1を床に固定されたベース部材3に枢支させておき、非着座時には椅子本体1の下方に設けたダンパーDやバネ部材Bを用いて自動的に前方に設けた机Tの天板下方位置に退避させるものであり、使用時には、着座者が椅子本体1を使用位置にまで引き戻して着座することができるようにしたものである。
【0018】
椅子本体1は、座ブラケット2を介して支持手段Sの上端に座部12を装着し、その座部12の後縁に背もたれ11を一体に垂設したものである。
【0019】
座ブラケット2は、支持手段Sを取り付けるための前後軸受孔22、23を設けた左右一対の側壁と、この左右側壁間に一体的に設けた底板とを具備し、この左右側壁の上端に設けた水平壁の有する取付孔21を介して、座部12の裏面にねじ止めされているものである。
【0020】
支持手段Sは、前記椅子本体1を前後方向に回動可能に支持するものであり、座部12の前方を前後回動可能に支持する前支持部材4と、座部12の後方を前後回動可能に支持する後支持部材5とから構成している。そして、床等に固定されるベース部材3に下端部を枢支させると共に、その上端部を前記椅子本体1に座ブラケット2を介して枢支させている。
【0021】
前支持部材4は、図2に示すように、上下に伸びる前壁と、その側面には、上下端部に上下軸受孔411、412を設けた左右の側壁を立設している前リンク要素41であり、軸を用いて上端部を座部12の前方に、下端部をベース部材3の前方に取り付けている。そして、この前リンク要素41の上下端部間の距離を回動半径R1として座部12の前方を前後回動可能に支持している。
【0022】
後支持部材5は、相互に回動可能に連結された上後リンク要素51と下後リンク要素52とから構成されるものであり、軸を用いて上端部を座部12の後方に、下端部をベース部材3の後方に回動可能に取り付けている。そして、この上後リンク要素51の上端部と下後リンク要素52の下端部と間の距離を回動半径R2として座部12の後方を前後回動可能としている。
【0023】
ベース部材3は、左右対をなすカップ部材からなる2分割タイプのもので、図2に示すように、底板を主体に構成されるベース本体3aを有し、その底板から延設する水平壁に取付孔を設け、図示しないボルト等を用いて床面上に固定される。また、その上面には、前記前支持部材4及び後支持部材5を枢着するための前後軸受孔31,32を有する左右の側壁を立設しており、これら両側壁間に前記前支持部材4及び後支持部材5の下端部を軸を介して枢着している。
【0024】
以上のような構成において、本実施形態の椅子Iは、前記椅子本体1に掛けた荷重に応じて前記前支持部材4と前記後支持部材5との相対的な回動半径R1、R2を変更可能な回動半径調節手段8と、椅子本体1の前回動を規制する前回動規制手段6と、椅子本体1の後回動を規制する後回動規制手段7とを具備している。
【0025】
回動半径調節手段8は、前記後支持部材5の回動半径R2を椅子本体1にかけた荷重に応じて変更可能とするものであり、具体的には、後支持部材5を構成する上下に分割した上下後リンク要素51、52を相互に回動可能に連結すると共に、上後リンク要素51の上端部を椅子本体1に、下後リンク要素52の下端部をベース部材3に固定することで、この上後リンク要素51の上端部と下後リンク要素52の下端部と間の距離つまり、回動半径R2を椅子本体1にかけた荷重に応じて変更可能に構成している。また、この上下後リンク要素51、52の間に回動半径R2の変更範囲を規制する変更範囲規制機構81を設けている。
【0026】
上後リンク要素51は、上下に伸びる後壁512と、その側面には、上下端部に上下軸受孔513、514を設けた左右の側壁511を立設しており、軸を用いて上端部を座部12の後方に、下端部を下後リンク要素52の上端部に回動可能に取り付けている。
【0027】
下後リンク要素52は、上後リンク要素51と同様に、上下に伸びる後壁522と、その側面には、上端部に上軸受孔523を設けた左右の側壁521を立設しており、その下端部には、幅方向に挿通する下軸受孔524を設けている。そして、両側壁521の外側面を前記上後リンク要素51の内側面に当接させ、軸を用いてその上端部を上後リンク要素51の下端部に、また、下端部を前記ベース部材3の後方に回動可能に取り付けている。
【0028】
変更範囲規制機構81は、前記上後リンク要素51の下端部に設けた規制部81aと、前記下後リンク要素52の上端部に設けられた規制アーム81bとを具備してなる。
【0029】
規制部81aは、前記上後リンク要素51の後壁811と、上後リンク要素51の左右側壁511の下端部間を横架する前壁812とから構成され、前記規制アーム81bが当該前後壁811、812に当接することにより上後リンク要素51と下後リンク要素52との回動を規制し、後支持部材5の回動半径R2の伸縮幅を規制するものである。
【0030】
規制アーム81bは、平面視略L字形状を成すものであり、下後リンク要素52の後壁522上端部の上面中央位置に前方向に突出するように設けられ、前記規制部81aを有する上後リンク要素51の下端部に設けた下向き開口空間Cに挿入されている。尚、この下向き開口空間Cには、下後リンク要素52に設けたバネ受け部材83に保持されたバネ部材82の一端を挿入し、常に上下後リンク要素51、52を鉛直方向に起立させる方向、つまり回動半径R2を大きくする方向に弾性付勢している。
【0031】
前回動規制手段6は、座部12の下方に設けたストッパ61と、前記後支持部材5の上端部に設けた前回動規制アーム62とから構成される。そして、図9から図11に示すように、この前回動規制アーム62が前記ストッパ61に当接することにより、後支持部材5を前方回動限界位置に規制し、前支持部材4及び後支持部材5が非平行四節リンクを形成した状態で、座部12を前方に傾斜した姿勢になるようにしている。
【0032】
ストッパ61は、座部12の下方、具体的には、座ブラケット2の左右側壁間を横架させた水平部材であり、その上部に座部12の前方で前回動規制アーム62を当接させる水平面及び垂直面を有する当接部を設けている。
【0033】
前回動規制アーム62は、上後リンク要素51の上端部に一体的に設けられるものであり、上後リンク要素51の左右側壁511の前方に左右一対に突出した状態に形成されている。
【0034】
後回動規制手段7は、床に固定されたベース部材3に設けたストッパ71と、前記後支持部材5の下端部に設けた後回動規制アーム72とから構成される。そして、図6、図8に示すように、この後回動規制アーム72が前記ストッパ71に当接することにより、後支持部材5を後方回動限界位置に規制し、前支持部材4及び後支持部材5が非平行四節リンクを形成した状態で、座部12を後方に傾斜した姿勢になるようにしている。
【0035】
ストッパ71は、ベース本体3aの上面に起立した起立壁3bであり、その上部に後回動規制アーム72の前面を当接させる水平面を有する当接部を設けている。
【0036】
後回動規制アーム72は、下後リンク要素52の下端部に一体的に設けられるものであり、幅方向中央部に下方に突出した状態に形成されている。
【0037】
次に、本実施の形態の椅子Iの使用例について説明する。
【0038】
まず、図4に示すように、何ら椅子本体1に荷重を掛けない場合には、椅子本体1の下方に設けたダンパーD等により椅子本体1が前方に弾性付勢されているため、前支持部材4の回動半径R1よりも後支持部材5の回動半径R2が大きい状態で、前回動規制手段6のストッパ61に前回動規制アーム62が当接すると共に、後回動規制アーム72の後面がベース部材3に設けた後壁73に当接するまで前方向に回動しており、最も座前縁が前方に位置する状態つまり、収納位置において保持される。この前傾収納位置では、座部12の前縁側が該椅子Iの前方に配設した机Tの天板の下側空間に侵入するとともに背もたれ11が前記天板の使用縁に近接することになり、図10、図11に示すように、椅子本体1が通行等の邪魔になり難くなる。
【0039】
そして、図5、図6に示すように、椅子Iを使用する際には、使用者が椅子本体1をダンパーD等の付勢力に抗して後方へ回動させ、後方に引いていく。すると、後支持部材5の上端部は椅子本体1に、下端部はベース部材3に固定されているため、椅子本体1の後方向に荷重を掛けるにつれ、後支持部材5はその回動半径R2を大きくし、前支持部材4との相対的な回動半径を変化させていく。したがって、椅子本体1は、後回動規制手段7のストッパ71に後回動規制アーム72の前面が当接するまで後方向に回動していき、最も座部12が後方位置にて保持される。この位置では、座部12の前縁側と机Tとの間に十分に空間ができると共に、座面が前傾姿勢となり着座者が着座しやすくなっている。
【0040】
次に、図7、図8に示すように、椅子Iに着座する際は、椅子本体1には座部12に作用する使用者の体重に起因して後方への回動力が付与される。そのため、徐々に後支持部材5が屈曲して回動半径R2を小さくしながら前傾し、座面を水平状態に近づけていく。そして、着座位置において、前記後回動規制アーム72がストッパ71に押付けられると共に、前記変更範囲規制機構81の規制アーム81bが後壁811に当接することにより、椅子本体1がその着座位置に安定保持される。
【0041】
また、図9に示すように、椅子Iに着座した状態のまま椅子Iの後方通過を許容するためには、着座者は前方向に荷重を掛けることにより、前方向に回動し、最適な座面角度を保ったまま椅子本体1を前方へ移動させることができる。
【0042】
以上のような構成の椅子Iにあっては、椅子本体1の回動軌跡に自由度が生まれ、例えば使用者が座部12に座り込む際には、椅子本体1を前後支持部材5にて非平行状態で支持し、椅子I後方のスペースを生かしてより後方に椅子本体1を引くことで、座り込む空間を十分に確保することができ、また、座面角度を座り込み易い角度にできるなど、椅子Iの使用状況に応じて使用者にとって使い勝手の配置や座面角度に変化させることができる。
【0043】
更に、回動半径調節手段8を、椅子本体1に掛けた荷重に応じて前支持部材4と後支持部材5との相対的な回動半径を変更可能なものに構成することで、容易に椅子本体1を最適な使用態様とすることが可能となる。
【0044】
また、後支持部材5を相対回動可能な上後リンク要素51と下後リンク要素52とから構成することで、簡易な構造にて前後支持部材4、5の相対的な回動半径R1、R2を変更できると共に、例えば下後リンク要素の下端部を床等に固定したベース部材3に取り付けた構成とすることで、椅子本体1を強く引いた際などにも安定した使用状態を確保することができる。
【0045】
加えて、椅子本体1の前回動を規制する前回動規制手段6を設けることで、例えば、椅子Iの収納時などに椅子本体1が最適な態様となるように前回動する範囲を規制しておき、椅子Iの使用状況に応じた最適な態様を容易且つ確実に実現することができる。
【0046】
また、椅子本体1の後回動を規制する後回動規制手段7を設けることで、例えば、椅子本体1を後方に引く時などに後方に設けた机Tなどにぶつからない様、後回動する範囲を規制しておくことで、椅子Iの使用状況に応じた最適な態様を容易且つ確実に実現することができる。
【0047】
なお、本発明における構成は、以上説明したものに限定されないのは勿論である。例えば、本実施の形態においては、回動半径調節手段8を後支持部材5に設けているが、前支持部材に設けてもよいし、また双方に設けることも考えられる。更に、回動半径調節手段8を支持部材4、5の長さを変更可能とするスライド機構等により構成しても良い。その他の構成も本発明の趣旨を逸脱しない範囲で種々変形が可能である。
【0048】
【発明の効果】
本願発明は、少なくとも座部を有する椅子本体と、この椅子本体の下方に設けられ、前記座部を回動可能に支持する支持手段とを具備する椅子において、前記支持手段を、前記座部の前方を前後回動可能に支持する前支持部材と、この座部の後方を前後回動可能に支持する後支持部材とから構成すると共に、この前支持部材又は後支持部材の回動半径を調整する回動半径調節手段を具備し、この回動半径調節手段を用いて前記前支持部材と前記後支持部材との相対的な回動半径を変更可能に構成したことを特徴とする。
【0049】
かかる椅子にあっては、椅子本体の回動軌跡に自由度が生まれ、例えば使用者が座部に座り込む際には、椅子本体を前後支持部材にて非平行状態で支持し、椅子後方のスペースを生かしてより後方に椅子本体を引くことで、座り込む空間を十分に確保することができ、また、座面角度を座り込み易い角度にできるなど、椅子の使用状況に応じて使用者にとって使い勝手の配置や座面角度に変化させることができる。
【図面の簡単な説明】
【図1】本実施の形態における椅子及び机の斜視図。
【図2】同実施の形態における椅子の分解斜視図。
【図3】同実施の形態における椅子の斜視図。
【図4】同実施の形態における椅子の収納態様を示す側面図。
【図5】同実施の形態における椅子の収納態様を示す側面図。
【図6】同実施の形態における椅子への着座過程を示す側面図。
【図7】同実施の形態における椅子への着座過程を示す側面図。
【図8】同実施の形態における着座態様を示す側面図。
【図9】同実施の形態における椅子の後方通過態様を示す側面図。
【図10】同実施の形態における椅子の後方通過態様を示す側面図。
【図11】同実施の形態における椅子の後方通過態様を示す側面図。
【符号の説明】
I・・・椅子
S・・・支持手段
R1・・・回動半径
R2・・・回動半径
1・・・椅子本体
4・・・前支持部材
5・・・後支持部材
8・・・回動半径調節手段
6・・・前回動規制手段
7・・・後回動規制手段
12・・・座部
51・・・上リンク要素(上後リンク要素)
52・・・下リンク要素(下後リンク要素)
61・・・ストッパ
62・・・前回動規制アーム
71・・・ストッパ
72・・・後回動規制アーム
[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to, for example, a chair that can automatically rotate and retract a chair body having a seat portion to a predetermined forward tilt storage position close to a desk or the like when not in use.
[0002]
[Prior art]
Conventionally, in a lecture room of a school or a company, a chair body having a seat is supported on a base member fixed to a floor using legs as support means, and the chair body is provided by a spring or the like provided on the base member. A chair that is biased forward is used. This chair is configured such that the chair body that is pivoted and retracted forward when not seated can be pulled back to a use position where the seat portion is substantially horizontal and can be seated. That is, when the chair is not in use, the chair body automatically turns and retracts to the forward tilted storage position, and for example, the front edge of the seat is stored below the top plate of the desk and the backrest is the top. The chair body would be close to or abut against the board so that the chair body would not get in the way when passing or cleaning. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-216081 (page 3, paragraph number 0017 FIG. 5)
[0004]
[Problems to be solved by the invention]
However, the chair as described above can be pivoted back and forth by pivoting the upper end of a leg having a certain length on the chair body and the lower end on the base body so as to be pivotable back and forth. Therefore, the turning radius is restricted by the length of the leg, and the turning trajectory is limited. Therefore, the user can form an optimal seat angle according to various situations such as when the chair is stored, seated, or when passing through the back of the chair, or the chair body can be placed in an optimal position. It could not be distributed, and it was inconvenient.
[0005]
SUMMARY OF THE INVENTION Accordingly, the present invention aims to provide a chair that advantageously solves the above problems, and is provided with a chair body having at least a seat portion and a lower portion of the chair body, the seat portion being rotatable. And a support means for supporting the support means, a front support member for supporting the front portion of the seat portion so as to be pivotable forward and backward, and a rear support for supporting the rear portion of the seat portion so as to be pivotable forward and backward. And a turning radius adjusting means for adjusting the turning radius of the front support member or the rear support member, and the rear support member is rearwardly moved in the operation range by tilting the rear support member backward. A stopper and a rear support member provided on the side of the seat bracket when the chair body is moved forward by adjusting the turning radius of the rear support member at the end to hold the chair body in the seating position. Before the top of the The same seat cushion angle with the seating position the chair body together with the rotation radius adjusting means to adjust the rotational radius by regulating the last movement of the rear support member relative to the seat bracket by abutting the movement restricting arm And a front turning restricting means that can be held in a position, and the turning radius adjusting means can be used to change the relative turning radius of the front support member and the rear support member. .
[0006]
In such a chair, a degree of freedom is generated in the rotation trajectory of the chair body. For example, when a user sits on the seat, the chair body is supported in a non-parallel state by the front and rear support members, and the space behind the chair By pulling the chair body to the rear by making the best use of it, it is possible to secure a sufficient space for sitting. In addition, the seating surface angle can be changed to the user-friendly arrangement or the seating surface angle according to the use situation of the chair, for example, by tilting the seating surface forward to an angle at which it is easy to sit down.
[0007]
Furthermore, in order to easily make the chair body an optimum mode, the turning radius adjusting means can change the relative turning radius of the front support member and the rear support member according to the load applied to the chair body. It is desirable to configure something.
[0008]
Further, by configuring the rear support member from an upper link element and a lower link element that can be relatively rotated, the relative rotation radius of the front and rear support members can be changed with a simple structure. By setting it as the structure attached to the base member which fixed the lower end part to the floor etc., when using a chair main body strongly, the stable use state can be ensured.
[0009]
In addition, by providing a front turning restricting means for restricting the front turning of the chair main body, for example, the range of the front turning so that the chair main body is in an optimal mode when the chair is stored is restricted. It is possible to easily and surely realize the optimum mode according to the use situation.
[0010]
Specifically, the front rotation restricting means is composed of a stopper provided below the seat and a front rotation restricting arm provided at the upper end of the support member, and the front rotation restricting arm is brought into contact with the stopper. It is desirable to restrict the forward rotation.
[0011]
In addition, by providing a rear rotation restricting means that restricts the rear rotation of the chair body, for example, when the chair body is pulled backward, the range of the rear rotation is controlled so as not to hit the desk provided at the rear. It is possible to easily and surely realize the optimum mode according to the use situation of the chair.
[0012]
Specifically, the rear rotation restricting means is composed of a stopper fixed to the floor or the like and a rear rotation restricting arm provided at the lower end of the support member. It is conceivable to regulate the contact.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a perspective view in which a desk T and a plurality of chairs I are arranged, and FIG. 2 is an exploded perspective view of the chair I.
[0015]
The chair I in the present embodiment is used in combination with a lecture desk T when a lecture is given at a school or the like, and a plurality of the desk T and the chair I are arranged in a line in the front-rear direction. These are arranged alternately, and are used with a plurality of chairs I arranged along the width direction.
[0016]
Hereinafter, each configuration will be described in detail.
[0017]
The chair I includes a chair body 1 having a seat portion 12 and support means S that supports the chair body 1 so as to be rotatable in the front-rear direction. Then, the chair body 1 is pivotally supported on the base member 3 fixed to the floor using the support means S, and when not seated, the damper D and the spring member B provided below the chair body 1 are automatically used. The chair is retracted to a position below the top of the desk T provided in front of the desk T, and in use, the seated person can pull back the chair body 1 to the use position and sit down.
[0018]
The chair body 1 has a seat portion 12 mounted on the upper end of the support means S via a seat bracket 2, and a backrest 11 is integrally suspended from the rear edge of the seat portion 12.
[0019]
The seat bracket 2 includes a pair of left and right side walls provided with front and rear bearing holes 22 and 23 for attaching the support means S, and a bottom plate integrally provided between the left and right side walls, and is provided at the upper ends of the left and right side walls. It is screwed to the back surface of the seat portion 12 through the mounting hole 21 of the horizontal wall.
[0020]
The support means S supports the chair body 1 so as to be pivotable in the front-rear direction, and supports a front support member 4 that supports the front of the seat 12 so as to be pivotable in the front-rear direction, and a rearward rotation of the rear of the seat 12. The rear support member 5 is movably supported. The base member 3 fixed to the floor or the like is pivotally supported at the lower end, and the upper end thereof is pivotally supported by the chair body 1 via the seat bracket 2.
[0021]
As shown in FIG. 2, the front support member 4 has a front link element in which up and down front walls and left and right side walls provided with upper and lower bearing holes 411 and 412 at the upper and lower ends are provided on the side surfaces thereof. 41, the upper end portion is attached to the front of the seat portion 12 and the lower end portion is attached to the front of the base member 3 using a shaft. The distance between the upper and lower end portions of the front link element 41 is set as a turning radius R1, and the front of the seat portion 12 is supported so as to be able to turn back and forth.
[0022]
The rear support member 5 includes an upper rear link element 51 and a lower rear link element 52 that are connected to each other so as to be rotatable. The part is attached to the rear of the base member 3 so as to be rotatable. The distance between the upper end portion of the upper rear link element 51 and the lower end portion of the lower rear link element 52 is set as a rotation radius R2, and the rear of the seat portion 12 can be rotated forward and backward.
[0023]
As shown in FIG. 2, the base member 3 has a base body 3a mainly composed of a bottom plate, and has a horizontal wall extending from the bottom plate. A mounting hole is provided and fixed on the floor using a bolt or the like (not shown). Further, left and right side walls having front and rear bearing holes 31 and 32 for pivotally attaching the front support member 4 and the rear support member 5 are erected on the upper surface, and the front support member is interposed between the both side walls. 4 and the lower end part of the rear support member 5 are pivotally attached via a shaft.
[0024]
In the configuration as described above, the chair I of the present embodiment changes the relative turning radii R1 and R2 between the front support member 4 and the rear support member 5 in accordance with the load applied to the chair body 1. A possible turning radius adjusting means 8, a front turning restricting means 6 for restricting the front turning of the chair body 1, and a rear turning restricting means 7 for restricting the back turning of the chair body 1 are provided.
[0025]
The turning radius adjusting means 8 allows the turning radius R2 of the rear support member 5 to be changed according to the load applied to the chair body 1, and specifically, the upper and lower parts constituting the rear support member 5 can be changed. The divided upper and lower rear link elements 51 and 52 are rotatably connected to each other, and the upper end of the upper rear link element 51 is fixed to the chair body 1 and the lower end of the lower rear link element 52 is fixed to the base member 3. Thus, the distance between the upper end portion of the upper rear link element 51 and the lower end portion of the lower rear link element 52, that is, the turning radius R <b> 2 can be changed according to the load applied to the chair body 1. Further, a change range restriction mechanism 81 for restricting the change range of the turning radius R2 is provided between the upper and lower rear link elements 51 and 52.
[0026]
The upper rear link element 51 has a rear wall 512 extending vertically, and left and right side walls 511 provided with upper and lower bearing holes 513 and 514 on the upper and lower ends on the side surface thereof. Is attached to the rear of the seat portion 12 and the lower end portion is rotatably attached to the upper end portion of the lower rear link element 52.
[0027]
Similarly to the upper rear link element 51, the lower rear link element 52 is provided with a rear wall 522 extending vertically, and left and right side walls 521 provided with upper bearing holes 523 on the upper end portion thereof. A lower bearing hole 524 that is inserted in the width direction is provided at the lower end portion. Then, the outer side surfaces of both side walls 521 are brought into contact with the inner side surface of the upper rear link element 51, and the upper end thereof is used as the lower end portion of the upper rear link element 51 and the lower end portion thereof is used as the base member 3. It is attached so that it can be rotated behind.
[0028]
The change range restriction mechanism 81 includes a restriction portion 81 a provided at the lower end portion of the upper rear link element 51 and a restriction arm 81 b provided at the upper end portion of the lower rear link element 52.
[0029]
The restricting portion 81a is composed of a rear wall 811 of the upper rear link element 51 and a front wall 812 that extends horizontally between the lower ends of the left and right side walls 511 of the upper rear link element 51, and the restricting arm 81b is connected to the front and rear walls. 811 and 812 are used to restrict the rotation of the upper rear link element 51 and the lower rear link element 52, and the expansion / contraction width of the rotation radius R2 of the rear support member 5 is restricted.
[0030]
The restricting arm 81b is substantially L-shaped in plan view, and is provided so as to project forward in the center of the upper surface of the upper end of the rear wall 522 of the lower rear link element 52, and has an upper portion having the restricting portion 81a. The rear link element 51 is inserted into a downward opening space C provided at the lower end portion. In this downward opening space C, one end of the spring member 82 held by the spring receiving member 83 provided in the lower rear link element 52 is inserted, and the upper and lower rear link elements 51 and 52 are always erected in the vertical direction. That is, it is elastically biased in the direction of increasing the turning radius R2.
[0031]
The front rotation restricting means 6 includes a stopper 61 provided below the seat portion 12 and a front rotation restricting arm 62 provided at the upper end portion of the rear support member 5. Then, as shown in FIG. 9 to FIG. 11, the front support member 4 and the back support member are controlled by the front turn restricting arm 62 coming into contact with the stopper 61 to restrict the back support member 5 to the front turn limit position. In a state in which 5 forms a non-parallel four-bar link, the seat portion 12 is inclined forward.
[0032]
The stopper 61 is a horizontal member extending horizontally below the seat portion 12, specifically, between the left and right side walls of the seat bracket 2, and the front rotation restricting arm 62 is brought into contact with the upper portion in front of the seat portion 12. A contact portion having a horizontal plane and a vertical plane is provided.
[0033]
The front rotation restricting arm 62 is integrally provided at the upper end portion of the upper rear link element 51, and is formed in a state protruding in front of the left and right side walls 511 of the upper rear link element 51.
[0034]
The rear rotation restricting means 7 includes a stopper 71 provided on the base member 3 fixed to the floor and a rear rotation restricting arm 72 provided on the lower end portion of the rear support member 5. Then, as shown in FIGS. 6 and 8, the rear rotation restricting arm 72 abuts against the stopper 71, thereby restricting the rear support member 5 to the rearward rotation limit position, and the front support member 4 and the rear support. In a state in which the member 5 forms a non-parallel four-bar link, the seat portion 12 is inclined backward.
[0035]
The stopper 71 is an upright wall 3b that stands on the upper surface of the base body 3a, and a contact portion having a horizontal surface that makes the front surface of the rear rotation restricting arm 72 contact with the upper portion of the upright wall 3b.
[0036]
The rear rotation restricting arm 72 is integrally provided at the lower end portion of the lower rear link element 52, and is formed in a state of projecting downward at the center in the width direction.
[0037]
Next, the usage example of the chair I of this Embodiment is demonstrated.
[0038]
First, as shown in FIG. 4, when no load is applied to the chair body 1, the chair body 1 is elastically biased forward by a damper D or the like provided below the chair body 1. In a state where the rotation radius R2 of the rear support member 5 is larger than the rotation radius R1 of the member 4, the front rotation restriction arm 62 contacts the stopper 61 of the front rotation restriction means 6, and the rear surface of the rear rotation restriction arm 72 Is pivoted forward until it comes into contact with the rear wall 73 provided on the base member 3, and is held in a state where the seat front edge is positioned forward, that is, in the storage position. In this forward tilted storage position, the front edge side of the seat 12 enters the lower space of the top plate of the desk T disposed in front of the chair I, and the backrest 11 is close to the use edge of the top plate. Thus, as shown in FIGS. 10 and 11, the chair body 1 is less likely to obstruct traffic.
[0039]
Then, as shown in FIGS. 5 and 6, when using the chair I, the user turns the chair body 1 backward against the urging force of the damper D and pulls it backward. Then, since the upper end part of the rear support member 5 is fixed to the chair body 1 and the lower end part is fixed to the base member 3, as the load is applied to the rear direction of the chair body 1, the rear support member 5 has its turning radius R2. Is increased, and the radius of rotation relative to the front support member 4 is changed. Therefore, the chair body 1 rotates backward until the front surface of the rear rotation restricting arm 72 comes into contact with the stopper 71 of the rear rotation restricting means 7, and the seat portion 12 is held most in the rear position. . At this position, a sufficient space is formed between the front edge side of the seat 12 and the desk T, and the seating surface is inclined forward so that a seated person can easily sit.
[0040]
Next, as shown in FIGS. 7 and 8, when sitting on the chair I, the chair body 1 is given a turning force in the rearward direction due to the weight of the user acting on the seat 12. Therefore, the rear support member 5 gradually bends and tilts forward while reducing the turning radius R2 to bring the seat surface closer to the horizontal state. Then, at the seating position, the rear rotation restricting arm 72 is pressed against the stopper 71, and the restricting arm 81b of the change range restricting mechanism 81 comes into contact with the rear wall 811, so that the chair main body 1 is stabilized at the seating position. Retained.
[0041]
In addition, as shown in FIG. 9, in order to allow the chair I to pass rearward while sitting on the chair I, the seat occupant is rotated forward by applying a load in the forward direction. The chair body 1 can be moved forward while maintaining the seat angle.
[0042]
In the chair I configured as described above, a degree of freedom is generated in the turning trajectory of the chair body 1. For example, when the user sits on the seat portion 12, the chair body 1 is not supported by the front and rear support members 5. The chair is supported in a parallel state, and the chair body 1 can be pulled further back by taking advantage of the space behind the chair I, so that a sufficient seating space can be secured, and the seating surface angle can be made easy to sit on. The user can change the arrangement and the seating angle according to the usage status of I.
[0043]
Furthermore, by configuring the turning radius adjusting means 8 so that the relative turning radius between the front support member 4 and the rear support member 5 can be changed according to the load applied to the chair body 1, it is easy. It becomes possible to make the chair main body 1 into an optimal usage mode.
[0044]
Further, by configuring the rear support member 5 from the upper rear link element 51 and the lower rear link element 52 that can be relatively rotated, the relative rotation radius R1 of the front and rear support members 4 and 5 with a simple structure, R2 can be changed and, for example, a configuration in which the lower end portion of the lower rear link element is attached to the base member 3 fixed to the floor or the like can ensure a stable use state even when the chair body 1 is pulled strongly. be able to.
[0045]
In addition, by providing the front turning restricting means 6 for restricting the front turning of the chair body 1, for example, the range in which the chair body 1 is turned forward is controlled so that the chair body 1 is in an optimum mode when the chair I is stored. In addition, it is possible to easily and surely realize the optimum mode according to the use situation of the chair I.
[0046]
Further, by providing the rear rotation restricting means 7 for restricting the rear rotation of the chair body 1, for example, when the chair body 1 is pulled backward, the rear rotation is prevented so as not to hit the desk T or the like provided at the rear. By regulating the range to be performed, the optimum mode according to the usage state of the chair I can be easily and reliably realized.
[0047]
Of course, the configuration of the present invention is not limited to the above-described configuration. For example, in this embodiment, the turning radius adjusting means 8 is provided on the rear support member 5, but it may be provided on the front support member or on both sides. Further, the turning radius adjusting means 8 may be constituted by a slide mechanism or the like that can change the length of the support members 4 and 5. Other configurations can be variously modified without departing from the spirit of the present invention.
[0048]
【The invention's effect】
The present invention relates to a chair comprising at least a chair main body having a seat portion and a support means provided below the chair main body and rotatably supporting the seat portion. The front support member that supports the front part so that it can pivot back and forth and the rear support member that supports the rear part of this seat so that it can pivot back and forth, and the turning radius of the front support member or rear support member is adjusted. The turning radius adjusting means is provided, and the turning radius adjusting means is used to change the relative turning radius of the front support member and the rear support member.
[0049]
In such a chair, a degree of freedom is generated in the rotation trajectory of the chair body. For example, when a user sits on the seat, the chair body is supported in a non-parallel state by the front and rear support members, and the space behind the chair By pulling the chair body backwards by making full use of it, it is possible to secure a sufficient space for sitting, and the seating surface angle can be made easy to sit on, etc. And the seating surface angle can be changed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a chair and a desk in the present embodiment.
FIG. 2 is an exploded perspective view of the chair according to the embodiment.
FIG. 3 is a perspective view of a chair according to the embodiment.
FIG. 4 is a side view showing a storage mode of the chair in the embodiment.
FIG. 5 is a side view showing a storage mode of the chair in the embodiment.
FIG. 6 is a side view showing a seating process on the chair in the embodiment.
FIG. 7 is a side view showing a seating process on the chair in the embodiment.
FIG. 8 is a side view showing a seating aspect in the embodiment.
FIG. 9 is a side view showing a rear passage mode of the chair in the embodiment.
FIG. 10 is a side view showing a rear passage mode of the chair in the embodiment.
FIG. 11 is a side view showing a rear passage mode of the chair in the embodiment.
[Explanation of symbols]
I ... chair S ... support means R1 ... turn radius R2 ... turn radius 1 ... chair body 4 ... front support member 5 ... rear support member 8 ... times Moving radius adjusting means 6 ... front turning restricting means 7 ... rear turning restricting means 12 ... seat 51 ... upper link element (upper rear link element)
52 ... Lower link element (lower rear link element)
61... Stopper 62... Front rotation restricting arm 71... Stopper 72.

Claims (6)

少なくとも座部を有する椅子本体と、この椅子本体の下方に設けられ、前記座部を回動可能に支持する支持手段とを具備する椅子において、
前記支持手段を、前記座部の前方を前後回動可能に支持する前支持部材と、この座部の後方を前後回動可能に支持する後支持部材とから構成すると共に、この前支持部材又は後支持部材の回動半径を調整する回動半径調節手段とを具備し、使用者が着座することにより後支持部材が動作範囲における後端となった時に後支持部材の回動半径を調整して椅子本体を着座位置に保持し得るものであって、
椅子本体を前方へ移動させる際に座部の下方に設けたストッパと後支持部材の上端に設けた前回動規制アームとを当接させることによって前記座ブラケットに対する前記後支持部材の前回動を規制することにより回動半径を調整した回動半径調節手段とともに前記椅子本体を前記着座位置と同じ座面角度に保持し得る前回動規制手段とを具備し、この回動半径調節手段を用いて前記前支持部材と前記後支持部材との相対的な回動半径を変更可能に構成したことを特徴とする椅子。
In a chair comprising at least a chair body having a seat portion and a support means provided below the chair body and rotatably supporting the seat portion,
The support means includes a front support member that supports the front of the seat portion so as to be capable of pivoting back and forth, and a rear support member that supports the rear of the seat portion so as to be capable of pivoting back and forth. A turning radius adjusting means for adjusting a turning radius of the rear support member, and when the user is seated , the turning radius of the rear support member is adjusted when the rear support member becomes the rear end in the operation range. The chair body can be held in the sitting position ,
When the chair body is moved forward, the front support of the rear support member with respect to the seat bracket is restricted by bringing a stopper provided below the seat portion into contact with a front rotation control arm provided at the upper end of the rear support member. The turning radius adjusting means that adjusts the turning radius thereby, and the front turning restricting means that can hold the chair body at the same seating surface angle as the seating position, and using the turning radius adjusting means, A chair configured to be capable of changing a relative turning radius between a front support member and the rear support member.
回動半径調節手段が、椅子本体に掛けた荷重に応じて前支持部材と後支持部材との相対的な回動半径を変更可能なものであることを特徴とする請求項1記載の椅子。  The chair according to claim 1, wherein the turning radius adjusting means is capable of changing a relative turning radius between the front support member and the rear support member in accordance with a load applied to the chair body. 後支持部材を相対回動可能な上リンク要素と下リンク要素とから構成したことを特徴とする請求項1または2記載の椅子。  The chair according to claim 1 or 2, wherein the rear support member is composed of an upper link element and a lower link element capable of relative rotation. 前回動規制手段を、座の下方に設けたストッパと、支持部材の上端部に設けた前回動規制アームとから構成し、この前回動規制アームを前記ストッパに当接させることにより前回動を規制したことを特徴とする請求項1乃至3の何れかに記載の椅子。  The front rotation restricting means is composed of a stopper provided below the seat and a front rotation restricting arm provided at the upper end of the support member, and the front turning is restricted by bringing the front turning restricting arm into contact with the stopper. The chair according to any one of claims 1 to 3, wherein the chair is formed. 椅子本体の後回動を規制する後回動規制手段を設けたことを特徴とする請求項1乃至4の何れかに記載の椅子。  The chair according to any one of claims 1 to 4, further comprising a rear rotation restricting means for restricting the rear rotation of the chair body. 後回動規制手段を、床等に固定されたストッパと、支持部材の下端部に設けた後回動規制アームとから構成し、この後回動規制アームを前記ストッパに当接させることにより後回動を規制したことを特徴とする請求項5記載の椅子。  The rear rotation restricting means is composed of a stopper fixed to the floor or the like and a rear rotation restricting arm provided at the lower end of the support member, and the rear turning restricting arm is brought into contact with the stopper to make the rear 6. The chair according to claim 5, wherein rotation is restricted.
JP2002335774A 2002-11-19 2002-11-19 Chair Expired - Fee Related JP4204850B2 (en)

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WO2009107252A1 (en) * 2008-02-28 2009-09-03 沖電気工業株式会社 Chair
JP5554022B2 (en) * 2008-06-27 2014-07-23 愛知株式会社 Chair
JP5475327B2 (en) * 2009-05-27 2014-04-16 株式会社岡村製作所 Chair
JP2011200475A (en) * 2010-03-26 2011-10-13 Quali:Kk Chair for game hall

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