JP2004275579A

JP2004275579A - Chair with trunk supporting function

Info

Publication number: JP2004275579A
Application number: JP2003073630A
Authority: JP
Inventors: Yuji Kono; 有次光野; Haruo Yamatani; 晴男山谷
Original assignee: FUKUTO KK; MUGEN KOBO KK
Current assignee: FUKUTO KK; MUGEN KOBO KK
Priority date: 2003-03-18
Filing date: 2003-03-18
Publication date: 2004-10-07
Anticipated expiration: 2023-03-18
Also published as: JP4202160B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair which prevents a trunk of the person who sits down on the chair from inclining in the chair, being turned over, or bending forward, and prevents falling down from the chair resulting from these causes, and prevents the posture from becoming off balanced, by supporting right and left side of the trunk on both bottom sides on sitting surface, when a sick person, an elderly, a handicapped person, or an ordinary person sit down on the chair, and to make it possible to sit on the chair comfortably for long time. <P>SOLUTION: The chair is arranged with trunk supporting panels 6 for supporting right and left sides of the trunk a, in right and left sides of inner upper sitting surfaces on right and left elbow rests 4. The trunk a and inside 6a of abutting right and left trunk supporting panel 6 is formed into recessed and curved shape on the plan view inward. The rear end sides of the trunk supporting panels 6 are turnably connected with both the right and left ends of backrest 5 in the condition that they are pushed towards the outside elbow rests 4 to the trunk a. The chair is also equipped with a operating mechanism 7 for trunk supporting panel to both elbow rests 4, which pushes and rotates the trunk supporting panels 6 to the trunk a, and lock it in the trunk support position, between trunk support release position and trunk support position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、病人、老人、障害者、健常者などが椅子に座った場合に、座面上の両脇下側となる左右の体幹側部を保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座ることのできる体幹保持機能付き椅子に関するものである。
【０００２】
【従来の技術】
病人、老人、障害者などが椅子に座った場合、座面上の体幹を支えることができず、椅子に座った者はその体幹が椅子内で傾いたり捻れたりし、又傾き捻れて前方に倒れて椅子から落ちることもあり、これを回避するために、体幹が傾く側の体幹と椅子との間にクッション材、毛布、枕などの充填材を挟み込んでおり、さらに、これでは不十分な場合には、紐などを使って座った者の体幹を椅子に縛り付けている。また、健常者などが椅子に長時間座って、勉強、仕事、テレビゲーム、パソコンやＯＡ機器の操作などをする場合にあっては、楽な姿勢を求めて体幹を適宜傾けたり前屈みなどになりながら各種の作業や操作を続けている。
【０００３】
【発明が解決しようとする課題】
しかしながら、体幹が傾く側の体幹と椅子との間にクッション材、毛布、枕などの充填材を挟み込んでいる場合には時間の経過と共にこれらがずれて、体幹が椅子内で徐々に傾いたり捻れたりし、又充填材が椅子から外れ、これに起因して前方に倒れて椅子から落ちることもある。また、紐などを使って椅子に縛り付けておく場合には紐の一部が体に食い込んだりして痛みが伴い、何れにしても、椅子に座る一定時間、快適に椅子に座り続けることが困難であった。
また、健常者などが椅子に長時間座って、勉強、仕事、テレビゲーム、パソコンやＯＡ機器の操作などをする場合にあっても、同様に快適に椅子に長時間座り続けることが困難で、楽な姿勢を求めて体幹を傾けたり捻れたり前屈みなどの悪い癖が付き、その結果次第に姿勢が悪くなり、これに起因して肩こり、腰痛、筋肉痛、背骨の痛み、眼精疲労などを引き起こすという問題があった。
【０００４】
この発明は、上記のような課題に鑑み、その課題を解決すべく創案されたものであって、その目的とするところは、病人、老人、障害者、健常者などが椅子に座った場合に、座面上の両脇下側となる左右の体幹側部を保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座ることのできる体幹保持機能付き椅子を提供することにある。
【０００５】
【課題を解決するための手段】
以上の目的を達成するために、請求項１の発明は、椅子に座った者の両脇下側となる左右の体幹側部を保持する体幹保持盤を座面上方の左右両側にそれぞれ設置すると共に、体幹側部と当接する左右の体幹保持盤の内面側を平面視において内側に向けて凹曲状に形成し、左右の体幹保持盤を体幹保持解除位置と体幹保持位置との間で移動自在及び体幹保持位置でロック自在に椅子に設けた手段よりなるものである。
【０００６】
また、請求項２の発明は、肘掛けを備えた椅子に座った者の両脇下側となる左右の体幹側部を保持する体幹保持盤を左右の肘掛けの内側の座面上方の左右両側にそれぞれ設置すると共に、体幹側部と当接する左右の体幹保持盤の内面側を平面視において内側に向けて凹曲状に形成し、左右の体幹保持盤の後端側を背もたれの左右両端側に外側の肘掛けに向けて付勢した状態で内側の体幹側部に向けて回動自在に連結し、体幹保持解除位置と体幹保持位置との間で左右の体幹保持盤を内側の体幹側部に向けて押圧回動させ且つ体幹保持位置でロックする体幹保持盤作動機構を左右の肘掛けにそれぞれ設けた手段よりなるものである。
【０００７】
また、請求項３の発明は、肘掛けを備えた椅子に座った者の両脇下側となる左右の体幹側部を保持する体幹保持盤を左右の肘掛けの内側の座面上方の左右両側にそれぞれ設置すると共に、体幹側部と当接する左右の体幹保持盤の内面側を平面視において内側に向けて凹曲状に形成し、左右の体幹保持盤の後端側を背もたれの左右両端側に内側の体幹側部に向けて回動自在に連結し、体幹保持解除位置と体幹保持位置との間で左右の体幹保持盤を回動させ且つ体幹保持位置でロックする体幹保持盤作動機構を左右の肘掛けにそれぞれ設けた手段よりなるものである。
【０００８】
また、請求項４の発明は、肘掛けを備えた椅子に座った者の両脇下側となる左右の体幹側部を保持する体幹保持盤を左右の肘掛けの内側の座面上方の左右両側にそれぞれ設置すると共に、体幹側部と当接する左右の体幹保持盤の内面側を平面視において内側に向けて凹曲状に形成し、左右の体幹保持盤を左右の肘掛けにそれぞれ連結し、体幹保持盤が各々連結された左右の肘掛けを体幹保持解除位置と体幹保持位置との間で回動自在及び体幹保持位置でロック自在に椅子に設けた手段よりなるものである。
【０００９】
【発明の実施の形態】
以下、図面に記載の発明の実施の形態に基づいて、この発明をより具体的に説明する。
【００１０】
〔実施の形態−１〕
ここで、図１は体幹保持機能付き椅子の正面図、図２は体幹保持機能付き椅子の側面図、図３は体幹保持機能付き椅子の平面図、図４は体幹保持機能付き椅子の背面図、図５は体幹保持盤と背もたれとの連結部分の部分拡大図、図６は体幹保持盤作動機構の底面図、図７は体幹保持盤作動機構の正面図、図８は体幹保持盤作動機構の正面図である。
【００１１】
図１〜図４において、体幹保持機能付き椅子１は、左右前後の四本の脚２、脚２で支持される座面３、座面３の上方の左右両側に配置された左右の肘掛け４、座面３の後端部に配置された背もたれ５、及び左右の肘掛け４の内側の座面３の上方の左右両側に設置された左右の体幹保持盤６、体幹保持解除位置と体幹保持位置との間で左右の体幹保持盤６を内側の体幹側部ａに向けて押圧回動させ且つ体幹保持位置でロックする体幹保持盤作動機構７などから構成されている。
【００１２】
体幹保持機能付き椅子１は、病人、老人、障害者、健常者などが椅子に座った場合に、座面上の両脇下側となる左右の体幹側部ａを保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座ることのできる特徴を備えている。
【００１３】
四本の脚２は左右前後に所定の間隔をあけて配置され、又四本の脚２はその中間高さ位置で、前部側の左右の脚２が水平な前部脚連結桁２ａにより連結され、後部側の左右の脚２が水平な後部脚連結桁２ｂにより連結され、左側及び右側の前後の脚２が水平な側部脚連結桁２ｃによりそれぞれ連結されている。また、前部脚連結桁２ａと後部脚連結桁２ｂとの間には、座面３を支持するための複数の補助桁が前後方向に配置されている。
【００１４】
後部側の左右の脚２はその上部が水平な上部脚連結２ｄにより連結されている。上部脚連結２ｄは背もたれ５の後部側を支持するもので、後部脚連結桁２ｂと上下で平行になっている。背もたれ５は上部脚連結２ｄにネジなどにより固定されている。
【００１５】
四本の脚２は上下にスライド伸縮する構造になっており、このため、各脚２にはその下部外側面にスライド脚２ｅが上下スライド自在に取り付けられている。各脚２の下部外側面にはスライド溝が上下方向に形成され、脚２の下部外側面と当接するスライド脚２ｅの内側面にはスライド溝内に係合するスライド凸片が上下方向に形成されている。
【００１６】
各脚２の下部には内側面から外側面に向けて水平な高さ調節用孔がそれぞれ形成され、各脚２の高さ調節用孔には高さを調節する調節撮み２ｆの調節ネジがそれぞれ挿通されており、各調節撮み２ｆの調節ネジの先端側はスライド脚２ｅのスライド凸片の表面に上下方向に等間隔で複数形成されたネジ孔の何れかのネジ孔に螺合して、スライド脚２ｅを所定の高さで各脚２に固定する構造になっている。
【００１７】
座面３は、上記前部脚連結桁２ａ、後部脚連結桁２ｂ、左右の側部脚連結桁２ｃ及び前部脚連結桁２ａと後部脚連結桁２ｂとの間に配置された補助桁によって形成される平面上に配置される。座面３の前端側は左右方向に略直線状に形成され、座面３の後端側は後方に向けて凸曲線状に形成されている。座面３は硬板の上にクッション材を取り付けた構造から構成され、硬板には一部に孔が形成されていて、座面３に座った者はその臀部の一部がクッション材を介してこの孔に係止されることによって、所謂床ずれが防がれている。
【００１８】
肘掛け４は、座面３の上方の左右両側に配置されている。即ち、左側の肘掛け４は左側の前後に配置された脚２の上端間に前後方向に水平に配置され、右側の肘掛け４は右側の前後に配置された脚２の上端間に前後方向に水平に配置されている。左右の肘掛け４の前端側は丸みを帯びて前部側の脚２より少し前方に張り出しおり、左右の肘掛け４の後部側は内側に向けて曲線状に形成され後端側は丸みを帯びて後部側の脚２より少し後方に張り出している。また、左右の肘掛け４の内側面は平面視において凹曲状に形成されていて、左右の肘掛け４の内側に設置される左右の体幹保持盤６の外に向けて凸曲状に形成された外面側６ｂの形状に対応するようになっている。
【００１９】
背もたれ５は、座面３の後端側から後方に向けて傾斜して配置され、前記したように上部脚連結２ｄにネジなどにより固定されている。背もたれ５は平面視において前方に向けて凹曲状に形成され、座面３は座った者の背中と当接する硬板の前面側にクッション材を取り付けた構造から構成されている。
【００２０】
体幹保持盤６は、椅子に座った者の両脇下側となる左右の体幹側部ａを保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座らせる機能を果たすもので、左右の肘掛け４の内側の座面３の上方の左右両側に設置されている。
【００２１】
左右の体幹保持盤６は、体幹側部ａと当接する内面側６ａが平面視において内側に向けて凹曲状に形成されていて、丸みを帯びた左右の体幹側部ａの形状に対応して外側から包むように挟んで保持できる構造になっている。また、左右の体幹保持盤６は内面側６ａが内側に向けて凹曲状に形成されていることによって、体幹が左右に傾いたり捻れたりするのを防ぐことができるのは勿論、体幹が前屈みになるのを防ぐことも可能となる。
【００２２】
左右の体幹保持盤６は、硬板と、硬板の内面側に配置されたクッション材から構成されている。硬板によって体幹保持盤６が体幹からの荷重によって変形するのが防がれる。また、クッション材は体幹側部ａと当接する内面側６ａに位置していて、左右の体幹保持盤６の内面側６ａが柔軟な弾力をもって体幹側部ａを保持できるようになっている。
【００２３】
左右の体幹保持盤６は脇の下側を例えば高さ２５ｃｍ〜３０ｃｍの範囲で保持できるように、左右の体幹保持盤６の高さは例えば高さ２５ｃｍ〜３０ｃｍ程度になっている。また、左右の体幹保持盤６の上辺は、脇の下に対応する個所が下向きに凹曲状に窪んでいて、脇の下が体幹保持盤６の上辺に当たるのが回避されている。
【００２４】
左右の体幹保持盤６の後端側は背もたれ５の左右両端側に蝶番６ｃによって内側に向けて回動自在に連結されている。蝶番６ｃはそれぞれ片側に上下に２個取り付けられている。
【００２５】
蝶番６ｃによって背もたれ５の左右両端側に回動自在に連結された左右の体幹保持盤６は、それぞれ外側に向けてつまり肘掛け４側に向けて常時付勢されていて、解除状態では左右の体幹保持盤６はその付勢力によって外側に回動して左右の肘掛け４に当接している。
【００２６】
左右の体幹保持盤６の外側への回動の付勢力は、左右の体幹保持盤６の後端側を背もたれ５の左右両端側に蝶番６ｃを介して取り付ける際に、解除時の開き角度より少し外側に開いた角度の状態で、左右の体幹保持盤６の後端側と背もたれ５の左右両端側を密着して取り付けることにより生じさせることができる。左右の体幹保持盤６を内側に向けて回動すると、体幹保持盤６及び背もたれ５の密着部分の両クッション材は圧縮され、圧縮された密着部分のクッション材によって弾性復元力が生じて、外側への付勢力を発生させることができる。これ以外に、例えば付勢用のバネを蝶番６ｃに取り付けたり、或いは付勢用のバネを備えた蝶番６ｃを使用することでも対応可能である。
【００２７】
体幹保持盤作動機構７は、体幹保持解除位置と体幹保持位置との間で左右の体幹保持盤６を内側の体幹側部ａに向けて押圧回動させ且つ体幹保持位置でロックする機構で、左右の肘掛け４の下面に左右の体幹保持盤６の外面側６ｂに向けて取り付けられ、取付盤７ａ、スライド押圧杆７ｇ、操作レバー７ｉ、リンク７ｋなどから主に構成されている。
【００２８】
取付盤７ａは、左右の肘掛け４の中央下面に直に下向きに固定して体幹保持盤６の外面側６ｂに向けて取り付けられ、体幹保持盤６の外面側６ｂに向かってその前部側が下向きに９０度折曲された断面Ｌ字型の形状をしている。取付盤７ａの下向きに折曲された前部側には体幹保持盤６に向けて貫通孔７ｂが形成されている。
【００２９】
取付盤７ａの前部側の体幹保持盤６に面する前面には、内部に貫通孔７ｂと連通する貫通孔７ｃを有する調整盤７ｄが取り付けられている。また、取付盤７ａの前部側の後面には躯体型のガイド盤７ｅが一体的に固設され、ガイド盤７ｅには上記体幹保持盤６に向けて上記貫通孔７ｂに連通するガイド孔７ｆが貫通形成されている。
【００３０】
スライド押圧杆７ｇは、体幹保持盤６の外面側６ｂを直接押圧して体幹保持盤６を体幹側部ａに向けて押圧移動させるもので、体幹保持盤６に対して前進及び後退移動に、上記貫通孔７ｂ、７ｃ及びガイド孔７ｆを貫通してスライド自在に取り付けられている。スライド押圧杆７ｇは体幹保持盤６とは非連結で、押圧接触によって体幹保持盤６を体幹側部ａに向けて移動させるが、体幹保持盤６が元の状態に復帰するのは前記した体幹保持盤６に作用する付勢力によって行われ、体幹保持盤６の復帰にはスライド押圧杆７ｇは付与しない。
【００３１】
スライド押圧杆７ｇの前端には体幹保持盤６の外面側６ｂに当接する円柱型の押圧片７ｈが前後方向に移動自在に螺合されていて、この押圧片７ｈを一方向に回すと体幹保持盤６側に前進移動し、押圧片７ｈを反対方向に回すと体幹保持盤６側から後退移動するようになっている。押圧片７ｈを調節することによって、体幹保持盤６に対するスライド押圧杆７ｇの前端の突出量を調整でき、スライド押圧杆７ｇの押圧片７ｈの突出量が大きい場合には、体幹保持盤６を内側に向けてより大きく移動させることができる。
【００３２】
操作レバー７ｉはスライド押圧杆７ｇを前後に移動させるための操作杆で、操作レバー７ｉの先端には間をあけて上下に一対のＬ字型の作動リンク７ｊがそれぞれ取り付けられている。上側の作動リンク７ｊのＬ字型に曲がった先端側は上記スライド押圧杆７ｇの後端側の側面の上面に垂直軸回りに正逆回転自在に軸支され、又下側の作動リンク７ｊのＬ字型に曲がった先端側は上記スライド押圧杆７ｇの後端側の側面の下面に垂直軸回りに正逆回転自在に軸支されている。このように、Ｌ字型に曲がった上下の作動リンク７ｊの先端側は上下で挟んで状態で上記スライド押圧杆７ｇの後端側に枢結されている。
【００３３】
スライド押圧杆７ｇを挟んでその上下には一対のリンク７ｋが平行に取り付けられている。上下のリンク７ｋは側板７ｍによって一体的に結合されている。上下のリンク７ｋの一端側は躯体型のガイド盤７ｅの上面及び下面に垂直軸回りに正逆回転自在に軸支され、上下のリンク７ｋの他端側は上下の作動リンク７ｊのＬ字型に曲がった部分に正逆回転自在に軸支されている。
【００３４】
操作レバー７ｉを操作してスライド押圧杆７ｇを体幹保持盤６に対して進退動させる場合、上下のリンク７ｋは一端側を支点として他端側が所定の角度の範囲で往復回動することで、操作レバー７ｉの作動リンク７ｊは往復回動するリンク７ｋの他端側を基点として相対的に回動して、スライド押圧杆７ｇの後端側と枢結する作動リンク７ｊの先端側がスライド押圧杆７ｇを体幹保持盤６に向けて前進及び後退させる機構になっている。
【００３５】
操作レバー７ｉは、リンク７ｋの他端側を基点として１８０度の角度の範囲で正逆回転する構造になっており、図６において実線位置が体幹保持盤６の体幹保持解除位置であり、これから１８０度回転した仮想線位置が体幹保持盤６の体幹保持位置となり、体幹保持位置で体幹保持盤６をロックする。体幹保持解除位置から体幹保持位置までの回転範囲が操作レバー７ｉによる体幹保持盤６の押圧回動範囲となる。
【００３６】
なお、前記実施の形態の説明においては、スライド押圧杆７ｇの前端が体幹保持盤６の外面側６ｂと非連結の構造の場合について説明したが、図８のように、スライド押圧杆７ｇの前端の押圧片７ｈが体幹保持盤６の外面側６ｂに突設された連結具６ｄによって連結される構造でもよい。連結具６ｄによりスライド押圧杆７ｇの前端の押圧体７ｄと体幹保持盤６の外面側６ｂが連結されている場合には、スライド押圧杆７ｇが後退すると連結具６ｄを通じて体幹保持盤６も一体となってスライド押圧杆７ｇの後退方向つまり外側に向けて開く方向に回動するので、体幹保持盤６を常時外側の開く方向に付勢力を作用させる必要がなく、このため、前記の〔００２５〕〔００２６〕などで説明した構造を省略することができる。
【００３７】
次に、上記発明の実施の形態の構成に基づく体幹保持機能付き椅子の動作について以下説明する。
病人、老人、障害者、健常者などが体幹保持機能付き椅子１に座った後、左右の肘掛け４の下面側に取り付けられた体幹保持盤作動機構７の操作レバー７ｉを手で掴んで、図６において実線位置から仮想線位置まで１８０度回転させる。なお、健常者は自分の手で操作できるが、病人、老人、障害者、子供など自分の力では無理な場合には介添え者や保護者などが操作する。
【００３８】
操作レバー７ｉを操作して回転させると、操作レバー７ｉはＬ字型の作動リンク７ｊの折曲部のリンク７ｋ他端側との枢結箇所を中心として、相対的に１８０度回転する。リンク７ｋ他端側との枢結箇所は当初スライド押圧杆７ｇ上に位置しているが操作レバー７ｉの回転に連動して、リンク７ｋ一端側を中心として操作レバー７ｉの回転方向と逆向きに回転してスライド押圧杆７ｇ上から離れる。
【００３９】
当初は、リンク７ｋの両端側の枢結箇所及び操作レバー７ｉの作動リンク７ｊの先端側のスライド押圧杆７ｇとの枢結箇所は、スライド押圧杆７ｇ上にあって一直線状に位置しているが、操作レバー７ｉの回転によって、中間に位置するリンク７ｋ他端側の枢結箇所がスライド押圧杆７ｇ上から離れることによって、スライド押圧杆７ｇの後端側と枢結する操作レバー７ｉの作動リンク７ｊの先端側がスライド押圧杆７ｇを前方の体幹保持盤６の外面側６ｂに向けて移動させる。操作レバー７ｉは仮想線位置まで回転する間、スライド押圧杆７ｇを体幹保持盤６に向けて移動させる。
【００４０】
操作レバー７ｉの回転に連動してスライド押圧杆７ｇ上から徐々に離れていっていたリンク７ｋ他端側の作動リンク７ｊとの枢結箇所は、操作レバー７ｉの回転角度が９０度を過ぎると、逆にスライド押圧杆７ｇに向かって徐々に接近していき、操作レバー７ｉが仮想線位置に到達すると、スライド押圧杆７ｇ上に位置する。
【００４１】
リンク７ｋ他端側が一端側を中心として往復回動する間、作動リンク７ｊの先端側は往復回動するリンク７ｋ他端側の枢結箇所を中心として相対的に１８０度回転するが、リンク７ｋ他端側の枢結箇所が往復回動するために、作動リンク７ｊの先端側の回転移動は直線移動に変換されて、スライド押圧杆７ｇを前方の体幹保持盤６に向けて直線移動させることになる。
【００４２】
操作レバー７ｉの回転操作によって体幹保持盤６に向けて移動させられたスライド押圧杆７ｇは、その前端の押圧片７ｈが体幹保持盤６の外面側６ｂに当接してこれを前方の体幹保持盤６の内側に向けて押圧する。押圧片７ｈが当接する体幹保持盤６の外面側６ｂの表面には滑り易いように摩擦抵抗の小さな面シールが貼られている。
【００４３】
スライド押圧杆７ｇの前端の押圧片７ｈによる押圧によって、体幹保持盤６は背もたれ５との連結の蝶番６ｃを中心として、内側に座っている者の脇下側の体幹側部ａに向けて回動する。そして、操作レバー７ｉが仮想線位置に回転移動して到達すると、体幹保持盤６はその内面側６ａが体幹側部ａに接触する体幹保持位置に到達する。
【００４４】
操作レバー７ｉが仮想線位置に到達したとき、リンク７ｋの両端側の枢結箇所及び操作レバー７ｉの作動リンク７ｊの先端側のスライド押圧杆７ｇとの枢結箇所は、スライド押圧杆７ｇ上にあって一直線状に位置するため、体幹保持盤６からのスライド押圧杆７ｇに作用する反力によっては、操作レバー７ｉを元の状態に向けて回転させる回転モーメントが起きず、これによって、体幹保持盤作動機構７はロックされた状態になる。
【００４５】
このようにして、体幹保持機能付き椅子１に座った者は、背中側が背もたれ５によって保持され、左右の体幹側部ａが左右の体幹保持盤６によって保持されることになる。左右の体幹側部ａを保持する体幹保持盤６は体幹保持位置で体幹保持盤作動機構７がロックされることで同様にロックされる。
【００４６】
これにより、体幹保持機能付き椅子１に座った者は、体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのが防がれる。つまり、病人、老人、障害者のように自分の姿勢を維持出来ない者は、背もたれ５と左右の体幹保持盤６によって体幹が保持されるため、一定時間快適に椅子に座ることが可能となる。
【００４７】
また、健常者にあっても、背もたれ５と左右の体幹保持盤６によって体幹が保持されるため、姿勢が悪くなるのが防がれ、又体幹が保持されているために体幹を支えることによる疲労がなく、体幹保持機能付き椅子１に座って長時間の作業も可能となるなど、一定時間快適に椅子に座ることができる。
【００４８】
左右の体幹保持盤６による体幹保持位置を解除して元に戻す場合には、仮想線位置の操作レバー７ｉを逆向きに回転させて実線位置に戻す。操作レバー７ｉを逆向きに回転させると、前記の動作と逆の動作により、スライド押圧杆７ｇは体幹保持盤６の外面側６ｂから離れる方向に後退する。スライド押圧杆７ｇの前端の押圧片７ｈからの押圧がなくなると、これに連動して左右の体幹保持盤６はこれを開く方向に向けて作用する付勢力によって蝶番６ｃを中心に左右の肘掛け４側に向けて回動して左右に開いて、体幹保持解除位置に戻り、この体幹保持機能付き椅子１に座っていた者はこの椅子から離れることができる。
【００４９】
なお、スライド押圧杆７ｇの前端の押圧片７ｈが連結具６ｄによって体幹保持盤６の外面側６ｂに連結されている場合には、スライド押圧杆７ｇの前端の押圧片７ｈが後退すると、後退する押圧片７ｈに牽引されて体幹保持盤６はスライド押圧杆７ｇの後退側に向けて蝶番６ｃを中心に左右の肘掛け４側に向けて回動して左右に開いて、体幹保持解除位置に戻る。
【００５０】
〔実施の形態−２〕
ここで、図９は体幹保持機能付き椅子の正面図、図１０は体幹保持機能付き椅子の側面図、図１１は体幹保持機能付き椅子の平面図、図１２は体幹保持機能付き椅子の背面図、図１３は体幹保持盤作動機構の底断面図である。
【００５１】
図９〜図１２において、体幹保持機能付き椅子１１は、左右前後の四本の脚１２、脚１２で支持される座面１３、座面１３の上方の左右両側に配置された左右の肘掛け１４、座面１３の後端部に配置された背もたれ１５、左右の肘掛け１４にそれぞれ連結された左右の体幹保持盤１６、体幹保持盤１６が各々連結された左右の肘掛け１４を体幹保持解除位置と体幹保持位置でロックする体幹保持盤作動機構１７などから構成されている。
【００５２】
体幹保持機能付き椅子１１は、病人、老人、障害者、健常者などが椅子に座った場合に、座面上の両脇下側となる左右の体幹側部ａを保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座ることのできる特徴を備えている。
【００５３】
四本の脚１２は左右前後に所定の間隔をあけて配置され、後部側の左右の脚１２より高さが低い前部側の左右の脚１２は上部高さ位置で水平な前部脚連結桁１１２ａにより連結され、後部側の左右の脚１２はその中間高さ位置で水平な後部脚連結桁１２ｂにより連結され、左側及び右側の前後の脚１２が水平な側部脚連結桁１２ｃによりそれぞれ連結されている。また、前部脚連結桁１２ａと後部脚連結桁１２ｂとの間には、座面１３を支持するための複数の補助桁が前後方向に配置されている。
【００５４】
後部側の左右の脚１２はその上部が水平な上部脚連結１２ｄにより連結されている。上部脚連結１２ｄは背もたれ１５の後部側を支持するもので、後部脚連結桁１２ｂと上下で平行になっている。背もたれ１５は上部脚連結１２ｄにネジなどにより固定されている。
【００５５】
座面１３は、上記前部脚連結桁１２ａ、後部脚連結桁１２ｂ、左右の側部脚連結桁１２ｃ及び前部脚連結桁１２ａと後部脚連結桁１２ｂとの間に配置された補助桁によって形成される平面上に配置される。座面１３の前端側は左右方向に略直線状に形成され、座面１３の後端側は後方に向けて凸曲線状に形成されている。座面１３は硬板の上にクッション材を取り付けた構造から構成され、硬板には一部に孔が形成されていて、座面１３に座った者はその臀部の一部がクッション材を介してこの孔に係止されることによって、所謂床ずれが防がれている。
【００５６】
肘掛け１４は、座面１３の上方の左右両側に配置されている。即ち、左側の肘掛け１４は左側の前後に配置された脚１２の上方間に前後方向に水平に配置されると共に後部側の脚１２の上端に垂直軸回りに回転自在に取り付けられている。右側の肘掛け１４は右側の前後に配置された脚１２の上方間に前後方向に水平に配置されると共に後部側の脚１２の上端に垂直軸回りに回動自在に取り付けられている。
【００５７】
左右の肘掛け１４の内側には左右の体幹保持盤１６の外面側１６ｂの一部が一体的に連結されていて、左右の肘掛け１４を後部側の脚１２を中心として回動させることによって、左右の体幹保持盤１６を回動させて、座面１３に座った者の左右の体幹側部ａを保持させることができるようになっている。
【００５８】
左右の肘掛け１４の前端側は丸みを帯びて前部側の脚１２より少し前方に張り出しおり、左右の肘掛け１４の後部側は内側に向けて曲線状に形成され後端側は丸みを帯びて後部側の脚１２より少し後方に張り出している。また、左右の肘掛け１４の内側面は平面視において凹曲状に形成されていて、左右の肘掛け１４の内側に設置される左右の体幹保持盤１６の外に向けて凸曲状に形成された外面側１６ｂの形状に対応するようになっている。
【００５９】
背もたれ１５は、座面１３の後端側から後方に向けて傾斜して配置され、前記したように上部脚連結１２ｄにネジなどにより固定されている。背もたれ１５は平面視において前方に向けて凹曲状に形成され、座面１３は座った者の背中と当接する硬板の前面側にクッション材を取り付けた構造から構成されている。
【００６０】
体幹保持盤１６は、椅子に座った者の両脇下側となる左右の体幹側部ａを保持して、椅子に座った者の体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのを防ぎ、またこれらに起因して前方に傾いて椅子から落ちるのを防ぐと共に、姿勢が悪くなるのを防ぎ、一定時間快適に椅子に座らせる機能を果たすもので、左右の肘掛け１４の内側に一体的に連結されて座面１３の上方の左右両側に設置されている。
【００６１】
左右の肘掛け１４に一体的に連結された左右の体幹保持盤１６は、体幹側部ａと当接する内面側１６ａが平面視において内側に向けて凹曲状に形成されていて、丸みを帯びた左右の体幹側部ａの形状に対応して外側から包むように挟んで保持できる構造になっている。また、左右の体幹保持盤１６は内面側１６ａが内側に向けて凹曲状に形成されていることによって、体幹が左右に傾いたり捻れたりするのを防ぐことができるのは勿論、体幹が前屈みになるのを防ぐことも可能となる。
【００６２】
左右の体幹保持盤１６は、硬板と、硬板の内面側に配置されたクッション材から構成されている。硬板によって体幹保持盤１６が体幹からの荷重によって変形するのが防がれる。また、クッション材は体幹側部ａと当接する内面側１６ａに位置していて、左右の体幹保持盤１６の内面側１６ａが柔軟な弾力をもって体幹側部ａを保持できるようになっている。
【００６３】
左右の体幹保持盤１６は脇の下側を例えば高さ２５ｃｍ〜３０ｃｍの範囲で保持できるように、左右の体幹保持盤１６の高さは例えば高さ２５ｃｍ〜３０ｃｍ程度になっている。また、左右の体幹保持盤１６の上辺は、脇の下に対応する個所が下向きに凹曲状に窪んでいて、脇の下が体幹保持盤１６の上辺に当たるのが回避されている。
【００６４】
左右の体幹保持盤１６の後端側は背もたれ１５の左右両端側に蝶番１６ｃによって内側に向けて回動自在に連結されている。蝶番１６ｃはそれぞれ片側に上下に２個取り付けられている。
【００６５】
体幹保持盤作動機構１７は、左右の肘掛け１４に連結された左右の体幹保持盤１６を体幹保持解除位置と体幹保持位置でロックする機構で、左右の肘掛け１４の下面に左右の体幹保持盤１６の外面側１６ｂに向けて取り付けられ、後部側の左右の脚１２の上端に取り付けられた回動支持軸１７ａ、回動盤１７ｄ、スライド作動杆１７ｈ、作動索状１７ｋ、巻取軸１７ｍ、操作レバー１７ｎなどから主に構成されている。
【００６６】
回動支持軸１７ａは後部側の左右の脚１２の上端にそれぞれ取り付けられている。回動支持軸１７ａは円盤状の形状をしており、円盤状の側周面の一部には等間隔で複数の係合溝１７ｂが形成されている。また回動支持軸１７ａの側周面にストッパー突起１７ｃが突出して形成されている。
【００６７】
一方、この回動支持軸１７ａの外周には円形リング状の回動盤１７ｄが嵌合されている。回動盤１７ｄは円盤状の回動支持軸１７ａの外周を回動するもので、肘掛け１４の後部側の下面に下向きに取り付けられている。回動盤１７ｄの側周面の一部にはストッパー溝１７ｅが一定の角度で形成されており、このストッパー溝１７ｅには上記ストッパー突起１７ｃが係合していて、ストッパー突起１７ｃがこのストッパー溝１７ｅ内で回動できる範囲が回動盤１７ｄの回動範囲となる。
【００６８】
回動盤１７ｄの前方に向く側周面にはガイド盤１７ｆが一体的に突出形成されている。ガイド盤１７ｆには前後方向に向けてガイド孔１７ｇが形成され、ガイド孔１７ｇの内部側は幅が広くなっていて、回動支持軸１７ａの側周面に形成された前記の一部の係合溝１７ｂに面している。
【００６９】
ガイド孔１７ｇにはスライド作動杆１７ｈがスライド移動自在に取り付けられている。スライド作動杆１７ｈの前端側は回動支持軸１７ａの側周面に形成された複数の係合溝１７ｂの一つに挿入して係合する構造になっている。また、スライド作動杆１７ｈの前部側には係合溝１７ｂに係合する方向にスライド作動杆１７ｈを常時付勢するバネ１７ｉが取り付けられている。
【００７０】
スライド作動杆１７ｈの後端には連結孔１７ｊが形成されており、この連結孔１７ｊにはワイヤーなどからなる作動索状１７ｋの一端が連結されている。作動索状１７ｋの他端側は、その前方側の肘掛け１４の下面に取り付けられた巻取軸１７ｍに巻かれている。
【００７１】
巻取軸１７ｍには、肘掛け１４の側方に設けられた操作レバー１７ｎの回転軸が同軸状態に連結されていて、操作レバー１７ｎが回動するとこれと一体となって巻取軸１７ｍは回転する構造になっている。
【００７２】
この実施の形態では操作レバー１７ｎが上向きに回動すると巻取軸１７ｍは作動索状１７ｋを巻き取る方向に回転し、作動索状１７ｋが巻取軸１７ｍ側に引っ張られて移動すると、作動索状１７ｋが連結されたスライド作動杆１７ｈはその前端側が係合溝１７ｂから抜けて、ロック解除状態になる構造になっている。
操作レバー１７ｎが逆に下向きに回動するのを防ぐために、操作レバー１７ｎの端部にはストッパー１７ｐが肘掛け１４の下面に向けて突出して形成されている。
【００７３】
次に、上記発明の実施の形態の構成に基づく体幹保持機能付き椅子の動作について以下説明する。
病人、老人、障害者、健常者などが体幹保持機能付き椅子１１に座った後、左右の肘掛け１４の側方に取り付けられた体幹保持盤作動機構１７の操作レバー１７ｎを手で掴んで、上向きに回動させる。なお、健常者は自分の手で操作できるが、病人、老人、障害者、子供など自分の力では無理な場合には介添え者や保護者などが操作する。
【００７４】
操作レバー１７ｎを上向きに回動させると、操作レバー１７ｎに連結された同軸の巻取軸１７ｍが作動索状１７ｋを巻き取る方向に回転する。これにより作動索状１７ｋは巻取軸１７ｍ側に向けて引っ張られて移動し、作動索状１７ｋの一端が連結されたスライド作動杆１７ｈをバネ１７ｉの付勢力に打ち勝って巻取軸１７ｍ側に向けて移動させる。
【００７５】
スライド作動杆１７ｈが巻取軸１７ｍに向けて移動すると、回動支持軸１７ａの側周面に形成された複数の係合溝１７ｂの一つに係合されていたスライド作動杆１７ｈの前端側は係合溝１７ｂから抜け出て、ロック状態が解除される。
【００７６】
このロック解除状態で、左右の肘掛け１４を回動支持軸１７ａを中心として、左右の体幹保持盤１６を体幹側部ａに向けて回動させ、左右の体幹保持盤１６が左右の体幹側部ａを保持する体幹保持位置まできた時点で、操作レバー１７ｎを離す。操作レバー１７ｎを離すと、バネ１７ｉの付勢力により、スライド作動杆１７ｈの前端側が係合溝１７ｂの一つに挿入して係合されることにより、再びロック状態となる。
【００７７】
また、スライド作動杆１７ｈが係合溝１７ｂ側に移動することにより、作動索状１７ｋは巻き戻されて回動支持軸１７ａ側に移動する。作動索状１７ｋが巻き戻されることによって巻取軸１７ｍは逆回転し、巻取軸１７ｍと同軸の操作レバー１７ｎは下向きに回動し、操作レバー１７ｎのストッパー１７ｐが肘掛け１４の下面に当接して操作レバー１７ｎの下向きへの回動は停止される。
【００７８】
このようにして、体幹保持機能付き椅子１１に座った者は、背中側が背もたれ１５によって保持され、左右の体幹側部ａが左右の体幹保持盤１６によって保持されることになる。左右の体幹側部ａを保持する体幹保持盤１６は体幹保持位置で体幹保持盤作動機構１７によってロックされる。
【００７９】
これにより、体幹保持機能付き椅子１１に座った者は、体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのが防がれる。つまり、病人、老人、障害者のように自分の姿勢を維持出来ない者は、背もたれ１５と左右の体幹保持盤１６によって体幹が保持されるため、一定時間快適に椅子に座ることが可能となる。
【００８０】
また、健常者にあっても、背もたれ１５と左右の体幹保持盤１６によって体幹が保持されるため、姿勢が悪くなるのが防がれ、又体幹が保持されているために体幹を支えることによる疲労がなく、体幹保持機能付き椅子１１に座って長時間の作業も可能となるなど、一定時間快適に椅子に座ることができる。
【００８１】
左右の体幹保持盤６による体幹保持位置を解除して元に戻す場合には、前記同様に操作レバー１７ｎを上向きに回動させてロック状態を解除して、左右の肘掛け１４を回動支持軸１７ａを中心として開く方向に回動させることで体幹保持解除位置に戻り、この体幹保持機能付き椅子１１に座っていた者はこの椅子から離れることができる。
【００８２】
なお、この発明は上記発明の実施の形態に限定されるものではなく、この発明の精神を逸脱しない範囲で種々の改変をなし得ることは勿論である。前記実施の形態では肘掛けが設けられている場合で説明したが、肘掛けが設けられていない椅子にも適用できるのは勿論である。
【００８３】
【発明の効果】
以上の記載より明らかなように、この発明に係る体幹保持機能付き椅子によれば、病人、老人、障害者のように自分の姿勢を維持出来ない者は、背もたれと左右の体幹保持盤によって体幹が保持されるため、体幹が椅子内で傾いたり、捻れたり、前屈みになったりするのが防がれ、またこれらに起因して前方に傾いて椅子から落ちるのが防がれて、一定時間快適に椅子に座ることが可能となる。
また、健常者にあっても、背もたれと左右の体幹保持盤によって体幹が保持されるため、姿勢が悪くなるのが防がれ、又体幹が保持されているために体幹を支えることによる疲労がなく、体幹保持機能付き椅子に座って長時間の作業も可能となるなど、一定時間快適に椅子に座ることができる等、極めて新規的有益なる効果を奏するものである。
【図面の簡単な説明】
【図１】この発明の実施の形態−１を示す体幹保持機能付き椅子の正面図である。
【図２】この発明の実施の形態−１を示す体幹保持機能付き椅子の側面図である。
【図３】この発明の実施の形態−１を示す体幹保持機能付き椅子の平面図である。
【図４】この発明の実施の形態−１を示す体幹保持機能付き椅子の背面図である。
【図５】この発明の実施の形態−１を示す体幹保持盤と背もたれとの連結部分の部分拡大図である。
【図６】この発明の実施の形態−１を示す体幹保持盤作動機構の底面図である。
【図７】この発明の実施の形態−１を示す体幹保持盤作動機構の正面図である。
【図８】この発明の実施の形態−１の他例を示す体幹保持盤作動機構の正面図である。
【図９】この発明の実施の形態−２を示す体幹保持機能付き椅子の正面図である。
【図１０】この発明の実施の形態−２を示す体幹保持機能付き椅子の側面図である。
【図１１】この発明の実施の形態−２を示す体幹保持機能付き椅子の平面図である。
【図１２】この発明の実施の形態−２を示す体幹保持機能付き椅子の背面図である。
【図１３】この発明の実施の形態−２を示す体幹保持盤作動機構の底断面図である。
【符号の説明】
１体幹保持機能付き椅子
２脚
２ａ前部脚連結桁
２ｂ後部脚連結桁
２ｃ側部脚連結桁
２ｄ上部脚連結
２ｅスライド脚
２ｆ調節撮み
３座面
４肘掛け
５背もたれ
６体幹保持盤
６ａ内面側
６ｂ外面側
６ｃ蝶番
６ｄ連結具
７体幹保持盤作動機構
７ａ取付盤
７ｂ貫通孔
７ｃ貫通孔
７ｄ調整盤
７ｅガイド盤
７ｆガイド孔
７ｇスライド押圧杆
７ｈ押圧片
７ｉ操作レバー
７ｊ作動リンク
７ｋリンク
７ｍ側板
１１体幹保持機能付き椅子
１２脚
１２ａ前部脚連結桁
１２ｂ後部脚連結桁
１２ｃ側部脚連結桁
１２ｄ上部脚連結
１３座面
１４肘掛け
１５背もたれ
１６体幹保持盤
１６ａ内面側
１６ｂ外面側
１６ｃ蝶番
１７体幹保持盤作動機構
１７ａ回動支持軸
１７ｂ係合溝
１７ｃストッパー突起
１７ｄ回動盤
１７ｅストッパー溝
１７ｆガイド盤
１７ｇガイド孔
１７ｈスライド作動杆
１７ｉバネ
１７ｊ連結孔
１７ｋ作動索状
１７ｍ巻取軸
１７ｎ操作レバー
１７ｐストッパー
ａ体幹側部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a body of a person sitting on a chair while holding the left and right trunk sides on both sides of the seat when a sick person, an elderly person, a disabled person, a healthy person, and the like sit on the chair. Prevents the trunk from tilting, twisting, or leaning forward in the chair, and preventing them from leaning forward and falling out of the chair due to these, and preventing posture from becoming worse and comfortable for a certain period of time. The present invention relates to a chair with a trunk holding function that can be seated on a chair.
[0002]
[Prior art]
When a sick, elderly or disabled person sits on a chair, the trunk on the seat cannot be supported, and those sitting on the chair may have their trunk tilted, twisted, twisted or twisted in the chair. In order to avoid falling down from the chair by falling forward, cushioning materials, blankets, pillows, etc. are sandwiched between the chair and the trunk on the side where the trunk leans, and furthermore, If that is not enough, the trunk of the person sitting is tied to a chair using a string or the like. In addition, when a healthy person sits in a chair for a long time to study, work, play video games, operate a personal computer or OA equipment, etc., the trunk should be tilted or bent forward for an easy posture. He continues to perform various tasks and operations as he becomes.
[0003]
[Problems to be solved by the invention]
However, if a cushioning material, blanket, pillow, etc. is sandwiched between the trunk and the chair on the side where the trunk leans, these will shift over time, and the trunk will gradually move in the chair. It may tilt or twist, and the filler may fall off the chair, causing it to fall forward and fall off the chair. In addition, when tied to a chair using a string, a part of the string digs into the body, causing pain, and in any case, it is difficult to sit comfortably in the chair for a certain period of time. Met.
In addition, even when a healthy person sits in a chair for a long time to study, work, play a video game, operate a personal computer or an OA device, it is similarly difficult to continue sitting in the chair for a long time. A bad habit such as tilting, twisting, or leaning forward of the trunk in search of a comfortable posture results in poor posture, resulting in stiff shoulders, low back pain, muscle pain, pain in the spine, eye strain, etc. There was a problem of causing.
[0004]
The present invention has been made in view of the above problems, and has been made in order to solve the problems. The purpose of the present invention is when a sick, elderly, disabled, or healthy person sits on a chair. Holding the left and right trunk sides on both sides of the seat to prevent the trunk of the person sitting on the chair from tilting, twisting, or leaning forward in the chair, and An object of the present invention is to provide a chair with a trunk holding function that can prevent the user from leaning forward and falling from the chair due to these factors, prevent the posture from being deteriorated, and comfortably sit on the chair for a certain period of time.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 includes a trunk holding plate that holds left and right trunk side portions that are both lower sides of a person sitting on a chair on both left and right sides above a seating surface, respectively. At the same time, the inner surfaces of the left and right trunk holding plates that are in contact with the trunk side are formed in a concave shape inward in plan view, and the left and right trunk holding plates are positioned at the trunk holding release position and the trunk. The chair is provided so as to be movable to and from the holding position and lockable at the trunk holding position.
[0006]
In addition, the invention according to claim 2 is characterized in that the trunk holding plate for holding the left and right trunk side portions, which are the lower sides of the side of the person sitting on the chair with armrests, is placed on the left and right sides above the seating surface inside the left and right armrests. In addition to being installed on both sides, the inner surfaces of the left and right trunk holding plates that are in contact with the trunk side are formed in a concave shape inward in plan view, and the rear ends of the left and right trunk holding plates are backed. The left and right trunks are pivotally connected to the inner trunk side with the right and left ends biased toward the outer armrests, and between the trunk holding release position and the trunk holding position. The trunk holding plate actuating mechanism for pressing and rotating the holding plate toward the inner trunk side and locking at the trunk holding position is provided on each of the left and right armrests.
[0007]
The invention according to claim 3 is characterized in that the trunk holding plate for holding the left and right trunk side portions, which are the lower sides on both sides of a person sitting on a chair with armrests, is provided on the left and right sides above the seating surface inside the left and right armrests. In addition to being installed on both sides, the inner surfaces of the left and right trunk holding plates that are in contact with the trunk side are formed in a concave shape inward in plan view, and the rear ends of the left and right trunk holding plates are backed. The left and right ends are rotatably connected to the inner trunk side portion, and the left and right trunk holding plates are rotated between the trunk holding release position and the trunk holding position, and the trunk holding position. And a means for locking the trunk holding plate operating mechanism on the left and right armrests.
[0008]
The invention according to claim 4 is characterized in that the trunk holding plate for holding the left and right trunk side portions, which are the lower sides of the person sitting on the chair with the armrests, is provided on the left and right sides above the seating surface inside the left and right armrests. In addition to being installed on both sides, the inner sides of the left and right trunk holding boards that contact the trunk side are formed in a concave shape inward in plan view, and the left and right trunk holding boards are respectively set on the left and right armrests A chair provided with left and right armrests connected to each other and to which a trunk holding board is connected, the chair being rotatable between a trunk holding release position and a trunk holding position and locked freely at a trunk holding position. It is.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically based on embodiments of the invention illustrated in the drawings.
[0010]
[Embodiment 1]
Here, FIG. 1 is a front view of a chair with a trunk holding function, FIG. 2 is a side view of the chair with a trunk holding function, FIG. 3 is a plan view of the chair with a trunk holding function, and FIG. Rear view of the chair, FIG. 5 is a partially enlarged view of a connecting portion between the trunk holding board and the backrest, FIG. 6 is a bottom view of the trunk holding board operating mechanism, and FIG. 7 is a front view of the trunk holding board operating mechanism. 8 is a front view of the trunk holding plate operating mechanism.
[0011]
In FIGS. 1 to 4, a chair 1 with a trunk holding function includes four left and right front and rear legs 2, a seating surface 3 supported by the legs 2, and left and right armrests disposed on the left and right sides above the seating surface 3. 4, a backrest 5 disposed at the rear end of the seating surface 3, and left and right trunk holding plates 6 installed on the left and right sides above the seating surface 3 inside the left and right armrests 4, a trunk holding release position and It comprises a trunk holding plate operating mechanism 7 which presses and rotates the left and right trunk holding plates 6 toward the inner trunk side a between the trunk holding positions and locks the trunk holding position at the trunk holding position. I have.
[0012]
The chair 1 with a trunk holding function holds the left and right trunk side portions a on both sides of the seat surface when a sick person, an elderly person, a disabled person, a healthy person, or the like sits on the chair. To prevent the torso of the person sitting in the chair from leaning, twisting, or leaning forward in the chair, and to prevent them from leaning forward and falling out of the chair, and to prevent the posture from becoming worse. It has features that prevent it and allow you to sit comfortably in a chair for a certain period of time.
[0013]
The four legs 2 are arranged at predetermined intervals in the left, right, front and back, and the four legs 2 are located at an intermediate height position, and the left and right legs 2 on the front side are horizontal by a front leg connecting girder 2a. The left and right rear legs 2 are connected by a horizontal rear leg connecting girder 2b, and the left and right front and rear legs 2 are connected by a horizontal side leg connecting girder 2c. A plurality of auxiliary girders for supporting the seating surface 3 are arranged in the front-rear direction between the front leg connecting girder 2a and the rear leg connecting girder 2b.
[0014]
The left and right legs 2 on the rear side are connected by an upper leg connection 2d whose upper part is horizontal. The upper leg connection 2d supports the rear side of the backrest 5, and is vertically parallel to the rear leg connection girder 2b. The backrest 5 is fixed to the upper leg connection 2d by a screw or the like.
[0015]
The four legs 2 are configured to be slidable up and down, and a sliding leg 2e is attached to each leg 2 on its lower outer surface so as to be slidable up and down. A slide groove is formed in the lower outer surface of each leg 2 in the up-down direction, and a slide protrusion engaging in the slide groove is formed in the inner surface of the slide leg 2e in contact with the lower outer surface of the leg 2 in the up-down direction. Have been.
[0016]
At the lower part of each leg 2, a horizontal height adjusting hole is formed from the inner surface to the outer surface, and the height adjusting hole of each leg 2 is an adjusting screw for adjusting height 2f for adjusting the height. Are respectively inserted, and the tip side of the adjustment screw of each adjustment shooting 2f is screwed into one of a plurality of screw holes formed at equal intervals in the vertical direction on the surface of the slide convex piece of the slide leg 2e. Then, the slide legs 2e are fixed to each leg 2 at a predetermined height.
[0017]
The seating surface 3 is formed by the front leg connecting girder 2a, the rear leg connecting girder 2b, the left and right side leg connecting girder 2c, and the auxiliary girder disposed between the front leg connecting girder 2a and the rear leg connecting girder 2b. It is arranged on a plane to be formed. The front end side of the seating surface 3 is formed in a substantially linear shape in the left-right direction, and the rear end side of the seating surface 3 is formed in a convex curved shape toward the rear. The seat 3 has a structure in which a cushion material is mounted on a hard plate, and a hole is formed in a part of the hard plate. The so-called floor slippage is prevented by being locked in this hole through.
[0018]
The armrests 4 are arranged on the left and right sides above the seating surface 3. That is, the left armrest 4 is horizontally arranged in the front-rear direction between the upper ends of the legs 2 arranged on the left and front, and the right armrest 4 is horizontally arranged in the front-rear direction between the upper ends of the legs 2 arranged on the right and front. Are located in The front end sides of the left and right armrests 4 are rounded and slightly project from the front leg 2, and the rear sides of the left and right armrests 4 are formed in a curved shape toward the inside, and the rear end sides are rounded. It protrudes slightly backward from the rear leg 2. Further, the inner side surfaces of the left and right armrests 4 are formed in a concave shape in plan view, and are formed in a convex shape toward the outside of the left and right trunk holding plates 6 installed inside the left and right armrests 4. It corresponds to the shape of the outer surface side 6b.
[0019]
The backrest 5 is arranged to be inclined rearward from the rear end side of the seating surface 3 and is fixed to the upper leg connection 2d by a screw or the like as described above. The backrest 5 is formed in a concavely curved shape toward the front in a plan view, and the seating surface 3 has a structure in which a cushioning material is attached to the front side of a hard plate that comes into contact with the back of a seated person.
[0020]
The trunk holding board 6 holds the left and right trunk sides a, which are the lower sides of the person sitting on the chair, and the trunk of the person sitting on the chair leans, twists, or leans forward in the chair. This function prevents the patient from falling into the chair and leaning forward due to these factors, and also prevents the posture from deteriorating and allows the chair to sit comfortably for a certain period of time. It is installed on the left and right sides above the seating surface 3 inside the armrest 4.
[0021]
The left and right trunk holding boards 6 are formed such that the inner side 6a that contacts the trunk side a is concavely formed inward in plan view, and has a rounded shape of the left and right trunk side a. The structure is such that it can be sandwiched and held so as to be wrapped from the outside corresponding to the above. In addition, since the left and right trunk holding plates 6 are formed such that the inner surface side 6a is concavely curved toward the inside, it is possible to prevent the trunk from tilting and twisting to the left and right as well as the body. It is also possible to prevent the trunk from leaning forward.
[0022]
The left and right trunk holding boards 6 are each formed of a hard plate and a cushion material disposed on the inner surface side of the hard plate. The hard plate prevents the trunk holding plate 6 from being deformed by the load from the trunk. Further, the cushioning material is located on the inner surface side 6a in contact with the trunk side portion a, and the inner surface sides 6a of the left and right trunk holding boards 6 can hold the trunk side portion a with a flexible elasticity. I have.
[0023]
The height of the left and right trunk holding plates 6 is, for example, about 25 cm to 30 cm so that the left and right trunk holding boards 6 can hold the armpits in a range of, for example, a height of 25 cm to 30 cm. In addition, the upper side of the left and right trunk holding boards 6 is recessed downward at a location corresponding to the armpit, so that the armpit is prevented from hitting the upper side of the trunk holding board 6.
[0024]
The rear ends of the left and right trunk holding boards 6 are connected to the left and right ends of the backrest 5 by hinges 6c so as to be rotatable inward. Two hinges 6c are attached to one side, one above the other.
[0025]
The left and right trunk holding plates 6 rotatably connected to the left and right ends of the backrest 5 by the hinges 6c are constantly urged toward the outside, that is, toward the armrest 4 side. The trunk holding plate 6 is rotated outward by the urging force and is in contact with the left and right armrests 4.
[0026]
The urging force for turning the left and right trunk holding plates 6 outward is such that when the rear ends of the left and right trunk holding plates 6 are attached to the left and right ends of the backrest 5 via the hinges 6c, the opening at the time of release is released. This can be caused by attaching the rear ends of the left and right trunk holding plates 6 and the left and right ends of the backrest 5 in close contact with the angle slightly opened to the outside of the angle. When the left and right trunk holding plates 6 are rotated inward, both cushion members at the contact portion between the trunk holding plate 6 and the backrest 5 are compressed, and the compressed cushion material at the contact portion generates an elastic restoring force. , An outward biasing force can be generated. Other than this, for example, it is also possible to attach a spring for urging to the hinge 6c, or to use a hinge 6c provided with a spring for urging.
[0027]
The trunk holding plate operating mechanism 7 pushes and rotates the left and right trunk holding plates 6 toward the inner trunk side a between the trunk holding release position and the trunk holding position, and moves the trunk holding position to the trunk holding position. And is attached to the lower surfaces of the left and right armrests 4 toward the outer surfaces 6b of the left and right trunk holding plates 6, and mainly includes a mounting plate 7a, a slide pressing rod 7g, an operating lever 7i, a link 7k, and the like. Have been.
[0028]
The mounting plate 7a is fixed downward directly to the center lower surface of the left and right armrests 4 and mounted toward the outer surface side 6b of the trunk holding plate 6, and the front portion thereof is directed toward the outer surface side 6b of the trunk holding plate 6. The side has an L-shaped cross section bent downward by 90 degrees. A through hole 7b is formed on the front side of the mounting board 7a that is bent downward toward the trunk holding board 6.
[0029]
On the front surface facing the trunk holding plate 6 on the front side of the mounting plate 7a, an adjusting plate 7d having a through hole 7c communicating with the through hole 7b is mounted inside. A frame type guide plate 7e is integrally fixed to the rear surface of the front side of the mounting plate 7a, and a guide hole communicating with the through hole 7b toward the trunk holding plate 6 is provided in the guide plate 7e. 7f is formed through.
[0030]
The slide pressing rod 7g presses the outer surface side 6b of the trunk holding plate 6 directly to move the trunk holding plate 6 toward the trunk side a, and moves forward and backward with respect to the trunk holding plate 6. It is slidably mounted through the through holes 7b and 7c and the guide hole 7f for the backward movement. The slide pressing rod 7g is not connected to the trunk holding plate 6 and moves the trunk holding plate 6 toward the trunk side portion a by pressing contact, but the trunk holding plate 6 returns to the original state. Is performed by the urging force acting on the trunk holding plate 6, and the slide pressing rod 7g is not applied to the return of the trunk holding plate 6.
[0031]
At the front end of the slide pressing rod 7g, a cylindrical pressing piece 7h abutting on the outer surface side 6b of the trunk holding plate 6 is screwed movably in the front-rear direction. When the pressing piece 7h is turned in one direction, the body is turned. When the pressing piece 7h is turned in the opposite direction while moving forward to the trunk holding board 6 side, it moves backward from the trunk holding board 6 side. By adjusting the pressing piece 7h, the protrusion amount of the front end of the slide pressing rod 7g with respect to the trunk holding plate 6 can be adjusted. When the protrusion amount of the pressing piece 7h of the slide pressing rod 7g is large, the trunk holding plate 6 Can be moved more inward.
[0032]
The operating lever 7i is an operating rod for moving the slide pressing rod 7g back and forth, and a pair of L-shaped operating links 7j are attached to the tip of the operating lever 7i with a space therebetween. The L-shaped distal end of the upper operating link 7j is supported on the upper surface of the rear end side surface of the slide pressing rod 7g so as to be freely rotatable forward and reverse around a vertical axis. The L-shaped distal end is rotatably supported on the lower surface of the rear end side surface of the slide pressing rod 7g so as to be rotatable forward and backward around a vertical axis. As described above, the distal ends of the upper and lower operating links 7j bent in an L-shape are pivotally connected to the rear end of the slide pressing rod 7g while sandwiching the upper and lower operating links 7j.
[0033]
A pair of links 7k are attached in parallel above and below the slide pressing rod 7g. The upper and lower links 7k are integrally connected by a side plate 7m. One end of the upper and lower links 7k is rotatably supported on the upper and lower surfaces of a frame type guide plate 7e so as to be rotatable in the normal and reverse directions around a vertical axis, and the other end of the upper and lower links 7k is an L-shaped upper and lower operating link 7j. It is rotatably supported on the curved part so that it can rotate forward and backward.
[0034]
When the operating lever 7i is operated to move the slide pressing rod 7g forward and backward with respect to the trunk holding plate 6, the upper and lower links 7k are reciprocally rotated within a predetermined angle range with one end serving as a fulcrum. The operating link 7j of the operating lever 7i relatively rotates about the other end of the reciprocating link 7k as a base point, and the distal end of the operating link 7j pivotally connected to the rear end of the slide pressing rod 7g slides. A mechanism is provided for moving the rod 7g forward and backward toward the trunk holding board 6.
[0035]
The operation lever 7i is configured to rotate forward and backward within a range of an angle of 180 degrees with the other end of the link 7k as a base point. In FIG. 6, the solid line position is the trunk holding release position of the trunk holding board 6. The virtual line position rotated by 180 degrees from this position becomes the trunk holding position of the trunk holding plate 6, and locks the trunk holding plate 6 at the trunk holding position. The rotation range from the trunk holding release position to the trunk holding position is the pressing and rotating range of the trunk holding board 6 by the operation lever 7i.
[0036]
In the description of the above embodiment, the case where the front end of the slide pressing rod 7g is not connected to the outer surface side 6b of the trunk holding plate 6 has been described, but as shown in FIG. A structure in which the pressing piece 7h at the front end is connected by a connecting tool 6d protruding from the outer surface side 6b of the trunk holding plate 6 may be used. When the pressing body 7d at the front end of the slide pressing rod 7g and the outer surface side 6b of the trunk holding plate 6 are connected by the connecting member 6d, when the slide pressing rod 7g retreats, the trunk holding plate 6 is also connected through the connecting member 6d. As a unitary rotation of the slide pressing rod 7g in the retreating direction, that is, in the direction of opening outward, it is not necessary to always apply the urging force to the trunk holding plate 6 in the outward opening direction. [0025] The structure described in [0026] or the like can be omitted.
[0037]
Next, the operation of the chair with a trunk holding function based on the configuration of the embodiment of the present invention will be described below.
After the sick person, the elderly, the disabled, the healthy person, etc., sit on the chair 1 with a trunk holding function, the operating lever 7i of the trunk holding plate operating mechanism 7 attached to the lower surface of the left and right armrests 4 is grasped by hand. In FIG. 6, it is rotated by 180 degrees from the solid line position to the virtual line position. It should be noted that a healthy person can operate with his / her own hands, but if it is impossible with his or her own power, such as a sick person, elderly person, disabled person, or child, an attendant or a guardian will operate.
[0038]
When the operating lever 7i is operated and rotated, the operating lever 7i relatively rotates by 180 degrees around a pivotal connection point of the bent portion of the L-shaped operating link 7j with the other end of the link 7k. The pivotal connection point with the other end of the link 7k is initially located on the slide pressing rod 7g, but in conjunction with the rotation of the operation lever 7i, the rotation direction of the operation lever 7i is reversed around the one end of the link 7k. It rotates and separates from the slide pressing rod 7g.
[0039]
Initially, the pivotal connection points at both ends of the link 7k and the pivotal connection points of the operating lever 7i with the slide pressing rod 7g at the tip end of the operating link 7j are located on the slide pressing rod 7g and are located in a straight line. However, the rotation of the operation lever 7i causes the pivot point at the other end of the link 7k located in the middle to move away from above the slide pressure rod 7g, thereby actuating the operation lever 7i pivotally connected to the rear end of the slide pressure rod 7g. The distal end side of the link 7j moves the slide pressing rod 7g toward the outer surface side 6b of the front trunk holding plate 6. While the operation lever 7i rotates to the imaginary line position, it moves the slide pressing rod 7g toward the trunk holding board 6.
[0040]
When the rotation angle of the operation lever 7i exceeds 90 degrees, the pivotal connection point with the operation link 7j at the other end of the link 7k, which has been gradually separated from the slide pressing rod 7g in conjunction with the rotation of the operation lever 7i, Conversely, it gradually approaches the slide pressing rod 7g, and when the operation lever 7i reaches the imaginary line position, it is positioned on the slide pressing rod 7g.
[0041]
While the other end of the link 7k reciprocates around the one end, the distal end of the operating link 7j relatively rotates 180 degrees around the pivotal connection point at the other end of the reciprocating link 7k. Since the pivot point at the other end reciprocates, the rotational movement on the distal end side of the operation link 7j is converted into a linear movement, and the slide pressing rod 7g is linearly moved toward the front trunk holding plate 6. Will be.
[0042]
The slide pressing rod 7g moved toward the trunk holding plate 6 by the rotation operation of the operation lever 7i has its front end pressing piece 7h abutting against the outer surface side 6b of the trunk holding plate 6 and moving it forward. It is pressed toward the inside of the trunk holding plate 6. A surface seal having a small frictional resistance is affixed to the surface of the outer surface side 6b of the trunk holding plate 6 with which the pressing piece 7h contacts, so as to be easily slipped.
[0043]
By the pressing of the front end of the slide pressing rod 7g by the pressing piece 7h, the trunk holding board 6 is directed toward the trunk side a on the armpit side of the person sitting inside, centering on the hinge 6c connected to the backrest 5. To rotate. When the operation lever 7i rotates and reaches the virtual line position, the trunk holding plate 6 reaches the trunk holding position where the inner side 6a contacts the trunk side a.
[0044]
When the operating lever 7i reaches the imaginary line position, the pivotal connection points on both ends of the link 7k and the slide pressing rod 7g on the distal end side of the operating link 7j of the operation lever 7i are placed on the slide pressing rod 7g. Therefore, there is no rotational moment to rotate the operation lever 7i toward the original state due to the reaction force acting on the slide pressing rod 7g from the trunk holding plate 6, and thus, The trunk holding plate operating mechanism 7 is locked.
[0045]
In this way, the person sitting on the chair 1 with a trunk holding function has the back side held by the backrest 5, and the left and right trunk side portions a are held by the left and right trunk holding boards 6. The trunk holding plate 6 holding the left and right trunk side portions a is similarly locked by locking the trunk holding plate operating mechanism 7 at the trunk holding position.
[0046]
This prevents a person sitting on the chair 1 with a trunk holding function from leaning, twisting, or bending forward in the chair. In other words, those who cannot maintain their posture, such as the sick, elderly, and disabled, can sit comfortably in a chair for a certain period of time because their trunk is held by the backrest 5 and the left and right trunk holding discs 6. It becomes.
[0047]
Further, even in a healthy person, the trunk is held by the backrest 5 and the left and right trunk holding plates 6, so that the posture is prevented from being deteriorated, and the trunk is held because the trunk is held. There is no fatigue caused by supporting the body, and it is possible to work for a long time while sitting on the chair 1 with a trunk holding function.
[0048]
When releasing the trunk holding position by the left and right trunk holding boards 6 and returning to the original position, the operation lever 7i at the virtual line position is rotated in the opposite direction to return to the solid line position. When the operation lever 7i is rotated in the opposite direction, the slide pressing rod 7g retreats in a direction away from the outer surface side 6b of the trunk holding plate 6 by an operation reverse to the above operation. When there is no pressing from the pressing piece 7h at the front end of the slide pressing rod 7g, the left and right trunk holding plates 6 are interlocked with the left and right armrests around the hinge 6c by the urging force acting in the opening direction. It turns toward the side 4 and opens left and right, returns to the trunk holding release position, and the person sitting on the chair 1 with trunk holding function can leave this chair.
[0049]
In addition, when the pressing piece 7h at the front end of the slide pressing rod 7g is connected to the outer surface side 6b of the trunk holding plate 6 by the connecting tool 6d, when the pressing piece 7h at the front end of the slide pressing rod 7g retreats, it retreats. The torso holding plate 6 is pulled by the pressing piece 7h to rotate, the torso holding lever 6g is rotated toward the retreating side of the slide pressing rod 7g toward the left and right armrests 4 around the hinge 6c, and is opened to the left and right to release the torso holding. Return to position.
[0050]
[Embodiment 2]
Here, FIG. 9 is a front view of the chair with a trunk holding function, FIG. 10 is a side view of the chair with a trunk holding function, FIG. 11 is a plan view of the chair with a trunk holding function, and FIG. FIG. 13 is a bottom sectional view of the trunk holding plate operating mechanism.
[0051]
9 to 12, a chair 11 with a trunk holding function includes four left and right front and rear legs 12, a seating surface 13 supported by the legs 12, and left and right armrests disposed on both left and right sides above the seating surface 13. 14, a backrest 15 arranged at the rear end of the seating surface 13, left and right trunk holding boards 16 connected to the left and right armrests 14, respectively, and a left and right armrest 14 to which the trunk holding boards 16 are respectively connected. It comprises a trunk holding plate operating mechanism 17 which locks at the holding release position and the trunk holding position.
[0052]
The chair 11 with a trunk holding function holds the left and right trunk side parts a, which are both lower sides on the seat surface, when a sick person, an elderly person, a disabled person, a healthy person or the like sits on the chair. To prevent the torso of the person sitting in the chair from leaning, twisting, or leaning forward in the chair, and to prevent them from leaning forward and falling off the chair, and to prevent the posture from becoming worse. It has features that prevent it and allow you to sit comfortably in a chair for a certain period of time.
[0053]
The four legs 12 are arranged at predetermined intervals in the left, right, front and rear, and the front left and right legs 12 which are lower in height than the rear left and right legs 12 are connected to the front legs horizontally at the upper height position. The rear left and right legs 12 are connected by a horizontal rear leg connection girder 12b at an intermediate height position, and the left and right front and rear legs 12 are connected by a horizontal side leg connection girder 12c. Are linked. In addition, between the front leg connecting girder 12a and the rear leg connecting girder 12b, a plurality of auxiliary girder for supporting the seat surface 13 are arranged in the front-rear direction.
[0054]
The left and right legs 12 on the rear side are connected by an upper leg connection 12d having a horizontal upper portion. The upper leg connection 12d supports the rear side of the backrest 15, and is vertically parallel to the rear leg connection girder 12b. The backrest 15 is fixed to the upper leg connection 12d by a screw or the like.
[0055]
The seat surface 13 is formed by the front leg connecting girder 12a, the rear leg connecting girder 12b, the left and right side leg connecting girder 12c, and the auxiliary girder disposed between the front leg connecting girder 12a and the rear leg connecting girder 12b. It is arranged on a plane to be formed. The front end side of the seating surface 13 is formed in a substantially straight line in the left-right direction, and the rear end side of the seating surface 13 is formed in a convex curved shape toward the rear. The seating surface 13 has a structure in which a cushion material is attached on a hard plate, and a hole is formed in a part of the hard plate. The so-called floor slippage is prevented by being locked in this hole through.
[0056]
The armrests 14 are arranged on both left and right sides above the seating surface 13. That is, the left armrest 14 is horizontally disposed in the front-rear direction above the legs 12 disposed on the left and front, and is rotatably mounted on the upper end of the rear leg 12 about a vertical axis. The right armrest 14 is horizontally arranged in the front-rear direction above the legs 12 arranged on the right and left, and is rotatably attached to the upper end of the rear leg 12 around a vertical axis.
[0057]
A part of the outer surface side 16b of the left and right trunk holding boards 16 is integrally connected to the inside of the left and right armrests 14, and by rotating the left and right armrests 14 around the rear leg 12, By rotating the left and right trunk holding boards 16, the left and right trunk side portions a of the person sitting on the seat surface 13 can be held.
[0058]
The front ends of the left and right armrests 14 are rounded and slightly project from the front legs 12, and the rear sides of the left and right armrests 14 are formed in a curved shape toward the inside, and the rear ends are rounded. It protrudes slightly rearward from the rear leg 12. The inner side surfaces of the left and right armrests 14 are formed in a concave shape in plan view, and are formed in a convex shape toward the outside of the left and right trunk holding plates 16 installed inside the left and right armrests 14. It corresponds to the shape of the outer surface side 16b.
[0059]
The backrest 15 is disposed to be inclined rearward from the rear end side of the seating surface 13, and is fixed to the upper leg connection 12d by a screw or the like as described above. The backrest 15 is formed to have a concavely curved shape toward the front in a plan view, and the seating surface 13 has a structure in which a cushion material is attached to the front side of a hard plate that comes into contact with the back of a seated person.
[0060]
The trunk holding board 16 holds the left and right trunk side parts a, which are the lower sides of the side of the person sitting on the chair, and the trunk of the person sitting on the chair leans, twists, or leans forward in the chair. This function prevents the patient from falling into the chair and leaning forward due to these factors, and also prevents the posture from deteriorating and allows the chair to sit comfortably for a certain period of time. It is integrally connected to the inside of the armrest 14 and is installed on the left and right sides above the seating surface 13.
[0061]
The left and right trunk holding plates 16 integrally connected to the left and right armrests 14 are formed such that the inner surface side 16a that comes into contact with the trunk side portion a is concavely curved inward in plan view, and has a rounded shape. According to the shape of the right and left trunk side portions a, the structure is such that it can be sandwiched and held so as to be wrapped from the outside. In addition, the left and right trunk holding boards 16 are formed such that the inner surface side 16a is concavely curved toward the inside, so that the trunk can be prevented from tilting or twisting to the left and right as well as the body. It is also possible to prevent the trunk from leaning forward.
[0062]
The left and right trunk holding boards 16 are each composed of a hard plate and a cushion material disposed on the inner surface side of the hard plate. The hard plate prevents the trunk holding board 16 from being deformed by the load from the trunk. In addition, the cushioning material is located on the inner side 16a in contact with the trunk side part a, and the inner side 16a of the left and right trunk holding boards 16 can hold the trunk side part a with flexible elasticity. I have.
[0063]
The height of the left and right trunk holding plates 16 is, for example, about 25 cm to 30 cm so that the left and right trunk holding boards 16 can hold the armpits in a range of, for example, a height of 25 cm to 30 cm. In addition, the upper side of the left and right trunk holding boards 16 has a downwardly concave portion corresponding to the armpit, so that the armpit is prevented from hitting the upper side of the trunk holding board 16.
[0064]
The rear ends of the left and right trunk holding boards 16 are rotatably connected inward to the left and right ends of the backrest 15 by hinges 16c. Two hinges 16c are attached to one side, one above the other.
[0065]
The trunk holding plate operating mechanism 17 is a mechanism for locking the left and right trunk holding plates 16 connected to the left and right armrests 14 at the trunk holding release position and the trunk holding position. A rotation support shaft 17a, a rotation plate 17d, a slide operation rod 17h, an operation cable 17k, and a winding which are attached to the outer surface 16b of the trunk holding plate 16 and are attached to the upper ends of the left and right legs 12 on the rear side. It mainly comprises a take-off shaft 17m, an operation lever 17n and the like.
[0066]
The rotation support shafts 17a are respectively attached to the upper ends of the left and right legs 12 on the rear side. The rotation support shaft 17a has a disk shape, and a plurality of engagement grooves 17b are formed at equal intervals on a part of the disk-shaped side peripheral surface. Further, a stopper projection 17c is formed so as to protrude from a side peripheral surface of the rotation support shaft 17a.
[0067]
On the other hand, a circular ring-shaped rotating plate 17d is fitted around the outer periphery of the rotating support shaft 17a. The rotating disk 17d rotates on the outer periphery of a disk-shaped rotating support shaft 17a, and is attached to the lower surface on the rear side of the armrest 14 downward. A stopper groove 17e is formed at a certain angle on a part of the side peripheral surface of the rotating disk 17d, and the stopper protrusion 17c is engaged with the stopper groove 17e. The stopper protrusion 17c is connected to the stopper groove 17c. The range that can be turned within 17e is the range of rotation of the turntable 17d.
[0068]
A guide plate 17f is integrally formed on a side peripheral surface of the rotating plate 17d facing forward to protrude. A guide hole 17g is formed in the guide board 17f in the front-rear direction, and the inner side of the guide hole 17g is wide, and a part of the guide hole 17g is formed on the side peripheral surface of the rotation support shaft 17a. It faces the mating groove 17b.
[0069]
A slide operating rod 17h is slidably attached to the guide hole 17g. The front end side of the slide operating rod 17h is structured to be inserted into and engaged with one of a plurality of engagement grooves 17b formed on the side peripheral surface of the rotation support shaft 17a. Further, a spring 17i that constantly urges the slide operation rod 17h in a direction to be engaged with the engagement groove 17b is attached to the front side of the slide operation rod 17h.
[0070]
A connection hole 17j is formed at the rear end of the slide operation rod 17h, and one end of an operation cable 17k made of a wire or the like is connected to the connection hole 17j. The other end of the operating cable 17k is wound around a winding shaft 17m attached to the lower surface of the armrest 14 on the front side.
[0071]
A rotation shaft of an operation lever 17n provided on the side of the armrest 14 is coaxially connected to the winding shaft 17m, and when the operation lever 17n rotates, the winding shaft 17m rotates integrally with the rotation shaft. It has a structure to do.
[0072]
In this embodiment, when the operation lever 17n rotates upward, the winding shaft 17m rotates in the direction of winding the operating cable 17k, and when the operating cable 17k is pulled toward the winding shaft 17m and moves, the operating cable 17m moves. The slide operation rod 17h to which the shape 17k is connected has a structure in which the front end side of the slide operation rod 17h comes out of the engagement groove 17b to be in an unlocked state.
In order to prevent the operation lever 17n from rotating downward, a stopper 17p is formed at an end of the operation lever 17n so as to project toward the lower surface of the armrest 14.
[0073]
Next, the operation of the chair with a trunk holding function based on the configuration of the embodiment of the present invention will be described below.
After the sick person, the elderly, the disabled, the healthy person, etc., sit on the chair 11 with a trunk holding function, the operator grips the operating lever 17n of the trunk holding plate operating mechanism 17 attached to the left and right armrests 14 with his / her hand. , Rotate upward. It should be noted that a healthy person can operate with his / her own hands, but if it is impossible with his or her own power, such as a sick person, elderly person, disabled person, or child, an attendant or a guardian will operate.
[0074]
When the operation lever 17n is rotated upward, the coaxial winding shaft 17m connected to the operation lever 17n rotates in a direction to wind the operation cable 17k. As a result, the operating cable 17k is pulled and moved toward the winding shaft 17m, and the slide operating rod 17h, to which one end of the operating cable 17k is connected, overcomes the urging force of the spring 17i and moves toward the winding shaft 17m. Move toward
[0075]
When the slide operation rod 17h moves toward the winding shaft 17m, the front end side of the slide operation rod 17h engaged with one of the plurality of engagement grooves 17b formed on the side peripheral surface of the rotation support shaft 17a. Is released from the engagement groove 17b, and the locked state is released.
[0076]
In this unlocked state, the left and right armrests 14 are turned around the rotation support shaft 17a, and the left and right trunk holding boards 16 are turned toward the trunk side part a. When reaching the trunk holding position for holding the trunk side a, the operation lever 17n is released. When the operation lever 17n is released, the front end side of the slide operation rod 17h is inserted into and engaged with one of the engagement grooves 17b by the urging force of the spring 17i, so that the lock state is established again.
[0077]
When the slide operation rod 17h moves toward the engagement groove 17b, the operation cable 17k is rewound and moves toward the rotation support shaft 17a. When the operating cord 17k is unwound, the winding shaft 17m rotates in the reverse direction, the operation lever 17n coaxial with the winding shaft 17m rotates downward, and the stopper 17p of the operation lever 17n contacts the lower surface of the armrest 14. Thus, the downward rotation of the operation lever 17n is stopped.
[0078]
In this manner, the person sitting on the chair 11 with a trunk holding function has the back side held by the backrest 15 and the left and right trunk side portions a are held by the left and right trunk holding boards 16. The trunk holding plate 16 holding the left and right trunk side portions a is locked by the trunk holding plate operating mechanism 17 at the trunk holding position.
[0079]
This prevents a person sitting on the chair 11 with a trunk holding function from leaning, twisting, or leaning forward in the chair. In other words, those who cannot maintain their posture, such as the sick, elderly, and disabled, can sit comfortably in a chair for a certain period of time because the trunk is held by the backrest 15 and the left and right trunk holding boards 16. It becomes.
[0080]
In addition, even in a healthy person, the trunk is held by the backrest 15 and the left and right trunk holding plates 16, so that the posture is prevented from being deteriorated. In addition, the trunk is held because the trunk is held. There is no fatigue caused by supporting the body, and it is possible to sit on the chair 11 with a trunk holding function and work for a long time.
[0081]
When releasing the trunk holding position by the left and right trunk holding boards 6 and returning to the original position, the locked state is released by rotating the operation lever 17n upward as described above, and the left and right armrests 14 are rotated. By rotating the support shaft 17a in the opening direction about the support shaft 17a, it returns to the trunk holding release position, and the person sitting on the chair 11 with the trunk holding function can leave the chair.
[0082]
It should be noted that the present invention is not limited to the above embodiment of the present invention, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. In the above embodiment, the case where the armrest is provided has been described, but it is needless to say that the present invention can be applied to a chair without the armrest.
[0083]
【The invention's effect】
As is clear from the above description, according to the chair with a trunk holding function according to the present invention, a person who cannot maintain his or her own posture, such as a sick person, an elderly person, or a disabled person, has a backrest and left and right trunk holding discs. The torso holds the torso, preventing the torso from twisting, twisting, or leaning forward in the chair, and thus from leaning forward and falling out of the chair. Therefore, it is possible to comfortably sit on the chair for a certain period of time.
In addition, even in a healthy person, since the trunk is held by the backrest and the left and right trunk holding plates, the posture is prevented from being deteriorated, and the trunk is supported because the trunk is held. Therefore, the present invention has an extremely novel and beneficial effect, such as being able to sit comfortably in a chair for a certain period of time, such as being able to sit for a long time while sitting on a chair with a trunk holding function without fatigue.
[Brief description of the drawings]
FIG. 1 is a front view of a chair with a trunk holding function according to a first embodiment of the present invention.
FIG. 2 is a side view of the chair with a trunk holding function according to the first embodiment of the present invention.
FIG. 3 is a plan view of the chair with a trunk holding function according to the first embodiment of the present invention.
FIG. 4 is a rear view of the chair with a trunk holding function according to the first embodiment of the present invention.
FIG. 5 is a partially enlarged view of a connecting portion between a trunk holding board and a backrest, showing Embodiment 1 of the present invention.
FIG. 6 is a bottom view of the trunk holding plate operating mechanism according to the first embodiment of the present invention.
FIG. 7 is a front view of a trunk holding plate operating mechanism according to the first embodiment of the present invention.
FIG. 8 is a front view of a trunk holding plate operating mechanism showing another example of the first embodiment of the present invention.
FIG. 9 is a front view of a chair with a trunk holding function according to Embodiment 2 of the present invention.
FIG. 10 is a side view of the chair with a trunk holding function according to the second embodiment of the present invention.
FIG. 11 is a plan view of a chair with a trunk holding function, showing Embodiment 2 of the present invention.
FIG. 12 is a rear view of the chair with a trunk holding function according to the second embodiment of the present invention.
FIG. 13 is a bottom sectional view of a trunk holding plate operating mechanism showing Embodiment 2 of the present invention.
[Explanation of symbols]
1 Chair with trunk holding function
2 legs
2a Front leg connecting girder
2b Rear leg connecting girder
2c Side leg connecting girder
2d upper leg connection
2e slide leg
2f Adjustment shooting
3 seat
4 armrests
5 Backrest
6 Trunk holding board
6a Inside surface
6b Outer side
6c hinge
6d connector
7 Trunk holding plate operation mechanism
7a Mounting board
7b Through hole
7c through hole
7d adjustment board
7e Guide board
7f Guide hole
7g slide pushing rod
7h pressing piece
7i Operation lever
7j working link
7k link
7m side plate
11 Chair with trunk holding function
12 legs
12a Front leg connecting girder
12b Rear leg connecting girder
12c Side leg connecting girder
12d upper leg connection
13 Seat
14 Armrest
15 Backrest
16 Trunk holding board
16a Inside surface
16b Outer side
16c hinge
17 Trunk holding plate operating mechanism
17a Rotation support shaft
17b engagement groove
17c stopper projection
17d turntable
17e Stopper groove
17f Guide board
17g Guide hole
17h slide operation rod
17i spring
17j Connecting hole
17k operating cord
17m winding shaft
17n operation lever
17p stopper
a Trunk side

Claims

Trunk holding boards that hold the left and right trunk sides that are the lower sides of the person sitting on the chair are installed on each of the left and right sides above the seating surface, and the left and right trunk holding that contacts the trunk side The inner surface side of the board is formed concavely inward in plan view, and the left and right trunk holding boards can be moved between the trunk holding release position and the trunk holding position and can be locked at the trunk holding position. A chair with a trunk holding function, which is provided on a chair.

Trunk holding boards that hold the left and right trunk sides, which are the lower sides of the person sitting on a chair with armrests, are installed on the left and right sides above the seating surface inside the left and right armrests, respectively. The inner surfaces of the left and right trunk holding boards that contact the sides are formed in a concave shape facing inward in plan view, and the rear ends of the left and right trunk holding boards are attached to the outer armrests on the left and right ends of the backrest. In a state of being biased toward, it is rotatably connected to the inner trunk side, and the left and right trunk holding plates are moved between the trunk holding release position and the trunk holding position to the inner trunk side. A chair having a trunk holding function, wherein a trunk holding plate actuating mechanism for pressing and rotating toward the body and locking at a trunk holding position is provided on each of the left and right armrests.

Trunk holding boards that hold the left and right trunk sides, which are the lower sides of the person sitting on a chair with armrests, are installed on the left and right sides above the seating surface inside the left and right armrests, respectively. The inner surfaces of the left and right trunk holding plates that are in contact with the sides are formed in a concave shape facing inward in plan view, and the rear ends of the left and right trunk holding plates are located on the left and right ends of the backrest. Trunk holding plate actuating mechanism rotatably connected to the side, rotates left and right trunk holding plates between the trunk holding release position and the trunk holding position, and locks at the trunk holding position. A chair with a trunk holding function, characterized in that a chair is provided on each of the left and right armrests.

Trunk holding boards that hold the left and right trunk sides, which are the lower sides of the person sitting on a chair with armrests, are installed on the left and right sides above the seating surface inside the left and right armrests, respectively. The inner surfaces of the left and right trunk holding boards that come into contact with the sides are formed in a concave shape facing inward in plan view, and the left and right trunk holding boards are connected to the left and right armrests, respectively, and the trunk holding boards are respectively A chair having a trunk holding function, wherein the connected left and right armrests are provided on the chair so as to be rotatable between a trunk holding release position and a trunk holding position and to be freely lockable at the trunk holding position.