JP3675144B2

JP3675144B2 - Chair armrest device

Info

Publication number: JP3675144B2
Application number: JP34588097A
Authority: JP
Inventors: 敦郎邑上; 智士管; 浩一磯田
Original assignee: 株式会社イトーキクレビオ
Priority date: 1997-11-30
Filing date: 1997-11-30
Publication date: 2005-07-27
Anticipated expiration: 2017-11-30
Also published as: JPH11155682A

Description

【０００１】
【発明の属する技術分野】
本発明は、椅子の肘掛け装置に係わり、更に詳しくは肘掛け部が上下角度調節可能な椅子の肘掛け装置に関する。
【０００２】
【従来の技術】
従来、椅子の座部又は脚部から立ち上がった支持部に対して肘掛け部が上下角度調節可能なものは既に提供されている。そして、肘掛け部の角度調節機構としては、支持部の上端に肘掛け部の内部に取付けた傾動部材を傾動可能に枢着するとともに、支持部に複数の係合凹部を上下方向に所定間隔で形成し、該係合凹部に肘掛け部内に設けた前後移動可能な係合突起を弾性的に嵌合して多段階に角度調節するものがある。
【０００３】
しかし、従来の肘掛け部の角度調節機構は、係合突起を係合凹部に対して係脱するための操作レバーを肘掛け部を構成するカバー部材に取付け、一方、前記係合突起を設けた作動部材を傾動部材に取付け、そして操作レバーと作動部材とを直接的又は間接的にリンク連結している構造とするか、又は前記操作レバーの遊端部に前記係合突起を一体的に形成し若しくは係合ピン等を係止した構造が取られている。
【０００４】
そのため、前記傾動部材に対して相対的に肘掛け部のカバー部材を横移動させたり、回転させたりすることは不可能であった。尚、上下角度調節機構に関係する前記操作レバー等の全ての部材を傾動部材に取付けることも考慮されるが、その場合には前記カバー部材から操作レバーの操作部を露出させるための操作孔を充分に大きくしなければならなくなり、外観性においても劣り、また操作部と操作孔の孔縁との間に指を挟む危険性が生じるので現実的ではない。
【０００５】
【発明が解決しようとする課題】
本発明が前述の状況に鑑み、解決しようとするところは、座部又は脚部から立ち上がった支持部に対して肘掛け部が上下角度調節可能且つ左右横移動及び／又は左右角度調節可能な椅子の肘掛け装置における肘掛け部の上下角度調節機構において、肘掛け部のカバー部材に操作レバーを設け、その操作部を露出させるための操作孔を最小限の大きさに設定することが可能であり、肘掛け部の左右横移動、左右角度調節と併せて上下角度調節を行うことができる椅子の肘掛け装置を提供する点にある。
【０００６】
【課題を解決するための手段】
本発明は、前述の課題解決のために、座部又は脚部から立ち上がった支持部に対して肘掛け部が上下角度調節可能且つ左右横移動及び／又は左右角度調節可能な椅子の肘掛け装置であって、前記支持部の上端に傾動部材を水平な支軸にて上下傾動可能に連結し、該傾動部材に対して肘掛け部のカバー部材を横移動及び／又は回転可能に取付けるとともに、前記カバー部材の前部に操作レバーを上下傾動可能に取付けてその操作部を下面に露出させ、前記支持部の上端部前面側に上下に複数の係合凹部を形成し、中央部を前記傾動部材の前部に枢着した回動部材の前方へ延びた操作杆を前記操作レバーの上面に当接するとともに、前記回動部材の下方へ延びた作動杆の先端に係止した係合ピンを前記係合凹部に係合可能となし、更に前記回動部材を係合ピンが係合凹部に係合する回転方向に弾性付勢してなる椅子の肘掛け装置を構成した。
【０００７】
具体的には、前記操作レバーの横幅は、前記傾動部材に対して前記カバー部材が横移動又は回転変位しても、常に前記回動部材の操作杆の先端が該操作レバーの上面に当接するように設定するのである。また、前記回動部材の回動に伴って前記係合ピンが移動する軌跡に沿って前記傾動部材の両側面板に長孔を形成し、該長孔内に係合ピンの両端部をスライド可能に係合してなること、前記係合凹部を金属製のラック部材に形成し、該ラック部材をブロック体の前面上端部に嵌合し、筒状の前記支持部の上端部内にブロック体を嵌着することによって、該支持部の上端部にラック部材を固定してなることも好ましい。
【０００８】
【発明の実施の形態】
次に本発明の実施形態を添付図面に基づき更に詳細に説明する。図１は本発明に係る椅子を示し、図２は肘掛け部を水平に設定した状態、図３は肘掛け部の前部を上方へ向けて傾斜させた状態、図４〜図１５は各部の詳細を示し、図中符号１は椅子の脚部、２は座部、３は背凭れ部、４は肘掛け装置、５は支持部、６は肘掛け部をそれぞれ示している。
【０００９】
本発明の実施形態に係る肘掛け装置４は、座部２又は脚部１から立ち上がった支持部５に対して肘掛け部６を高さ調節可能且つ上下角度調節可能及び左右横移動、左右角度調節可能に設けたものである。しかし、本発明に係る肘掛け装置４は、上下角度調節機構及び左右横移動、左右角度調節機構に特徴を有するので、肘掛け部６が高さ調節可能であるかどうかは本質的ではない。
【００１０】
前記支持部５は、支持アーム７と昇降体８とより構成し、座部２に固定した支持アーム７の上部に、肘掛け部６に取付けた上下に開放した中空筒状の昇降体８を上下移動可能に外嵌した構造を有する。そして、前記支持アーム７と昇降体８との間には、支持アーム７に対して昇降体８の高さを調節し且つその高さを維持するための高さ調節機構が設けられている。
【００１１】
そして、上下角度調節機構は、図２〜図５に示すように、前記支持部５の上端に傾動部材９を水平な支軸１０にて上下傾動可能に連結し、前記傾動部材９を肘掛け部６内に収容した状態で、該傾動部材９に対して肘掛け部６を横移動及び／又は回転可能に取付けるとともに、前記肘掛け部６の前部に操作レバー１１を上下傾動可能に取付けてその操作部１２を下面に露出させ、前記支持部５の上端部前面側に上下に複数の係合凹部１３，…を形成し、中央部を前記傾動部材９の前部に枢着した回動部材１４の前方へ延びた操作杆１５を前記操作レバー１１の上面に当接するとともに、前記回動部材１４の下方へ延びた作動杆１６の先端に係止した係合ピン１７を前記係合凹部１３に係合可能となし、更に前記回動部材１４を係合ピン１７が係合凹部１３に係合する回転方向に該回動部材１４と傾動部材９との間に設けた弾性体１８にて弾性付勢してなるものである。
【００１２】
更に詳しくは、前記傾動部材９は、金属板を折曲形成したものであり、上面板１９の両側縁に側面板２０，２０を垂下するとともに、上面板１９の前後端を延長して保持板２１，２１を形成したものであり、前記側面板２０の前部が下方へ拡がった形状となっている。そして、前記側面板２０，２０の後部には、前記支軸１０を挿通するための軸孔２２，２２を形成するとともに、側面板２０，２０の前部の上端には前記回動部材１４を回動可能に支持する軸ピン２３を挿通するための通孔２４，２４を形成するとともに、前部下端部には前記回動部材１４の回動に伴って前記係合ピン１７が移動する軌跡に沿って、つまり前記軸孔２２に向かった長孔２５，２５を形成し、該長孔２５，２５内に係合ピン１７の両端部をスライド可能に係合するのである。
【００１３】
前記肘掛け部６は、合成樹脂製で作成した上部カバー部材２６と下部カバー部材２７を接合し、内部を中空となしたものであり、前記上部カバー部材２６には、前記傾動部材９を横移動可能及び回転可能に取付けるとともに、下部カバー部材２７には、前記支持部５を受け入れる開口２８と前記操作レバー１１の操作部１２を露出させる操作孔２９を形成している。
【００１４】
前記操作レバー１１は、板状の基部に軸部３０，３０を形成するとともに、遊端側の下部に前記操作部１２を突設したものである。該操作レバー１１の横幅は、前記傾動部材９に対して前記カバー部材２６，２７が横移動又は回転変位しても、常に前記回動部材１４の操作杆１５の先端が該操作レバー１１の上面に当接するように充分に幅広く設定している。そして、前記軸部３０は、操作レバー１１の板面に対して直交方向に偏平な形状となっており、該軸部３０を枢支するために前記下部カバー部材２７に内方へ突設した軸受部３１は、後方側に軸部３０の偏平幅に相当する間隙を設け、内部に軸部３０を回転可能に受け入れる軸受孔３２を形成し、操作レバー１１を立起させた状態で、軸部３０を軸受孔３２に挿入し、その後操作部１２が操作孔２９内に挿入されるように倒して取付けるのである。この取付状態では、前記軸部３０が軸受孔３２から抜けることはないのである。
【００１５】
前記回動部材１４は、中央部に前記軸ピン２３を挿通するための軸筒３３を形成し、該軸筒３３から前方へ前記操作杆１５が延びて、該操作杆１５の先端部は前記操作レバー１１の上面と平行となっており、また軸筒３３から下方へ前記作動杆１６が延びて、該作動杆１６の先端は前記係合ピン１７を受け入れるＵ字状の係止部３４となっている。
【００１６】
前記係合凹部１３，…は、平面視略コ字形に形成した金属製のラック部材３５の両側片３６を形成し、該ラック部材３５を合成樹脂製のブロック体３７の前面上端部に嵌合し、筒状の前記昇降体８の上端部内にブロック体３７を嵌着することによって、該昇降体８の上端部にラック部材３５を固定し、もって支持部５の上端部前面側に上下に複数の係合凹部１３，…が形成されるのである。ここで、前記ブロック体３７の前面には上縁に下向きの係合爪３８を形成し、その下方に間隔を置いて水平な支持片３９を突設し、該支持片３９の上方側の前面に突部４０を形成してあり、そして前記ラック部材３５の基板４１の上縁を前記係合爪３８に係合するとともに、下縁を支持片３９に当接し且つ基板４１に形成した係合穴４２を突部４０に嵌合し、その状態でブロック体３７を昇降体８の上端部に嵌挿し、昇降体８の内面にラック部材３５の両側片３６，３６を当接させることよって、該ラック部材３５が完全に固定されるのである。
【００１７】
また、前記ブロック体３７には、内部に前記支持アーム７の上端部に設けた金属製の支持板４３を摺動可能に受け入れる摺動孔４４を上下貫通させて形成している。また、前記ブロック体３７を昇降体８に固定する構造は、昇降体８の内部に一体形成した垂直板４５に設けた係止孔４６にブロック体３７の前面下端部に設けた爪片４７を抜止め係合するとともに、ブロック体３７の後面上端部に突設した軸受部４８を前記昇降体８の上端後部に設けた一対の保持片４９，４９間に嵌合し且つ該保持片４９，４９に設けた軸孔５０，５０と軸受部４８に設けた軸孔５１とを共通孔として肘掛け部６を上下回動可能に枢支する支軸１０を挿通して連結するのである。
【００１８】
そして、肘掛け部６の上下角度を調節するには、前記操作レバー１１の操作部１２を上方へ押せば、該操作レバー１１が上方へ回転して前記回動部材１４の操作杆１５をその上面で押し上げ、該回動部材１４が弾性体１８の弾性付勢力に抗して回転し、もって作動杆１６の先端部に係止した係合ピン１７が傾動部材９の長孔２５，２５内を移動して係合凹部１３から離れ、この状態で肘掛け部６の前部を支軸１０を中心に上下に回転させることが可能となり、所定の角度に設定した後に前記操作部１２から指を離せば、弾性体１８の弾性付勢力によって係合ピン１７は対応する係合凹部１３に係合し、設定角度を維持するのである。
【００１９】
前記弾性体１８としては、前記回動部材１４の軸筒３３にコイル部を巻回し、両弾性脚を傾動部材９の上面板１９と操作杆１５とに係止したキックばねを用いた例を示したが、圧縮コイルばねや引張りコイルばねを用いることが可能である。ただし、前記傾動部材９に対して上部カバー部材２６及び下部カバー部材２７は相対的に変位するので、傾動部材９と共に変位する回動部材１４と該傾動部材９との間に弾性体１８を設けるべきである。
【００２０】
次に、肘掛け部６の左右横移動、左右角度調節機構を図２、図３、図５、図７〜図１１に基づいて説明する。この左右横移動、左右角度調節機構は、前記傾動部材９の前後端に設けた水平な保持板２１，２１にそれぞれスライダー５２，５２を嵌着し、該スライダー５２，５２を介して上部カバー部材２６の内部上面に取付板５３，５３で横移動可能に取付け、そして前記上部カバー部材２６の内部上面の幅方向にガイド溝５４を設け、該ガイド溝５４に沿ってクリック部材５５を移動可能に嵌合するとともに、該クリック部材５５の下方に突設した回転軸５６を前記傾動部材９の上面板１９の中心部に形成した円孔５７に回転可能に嵌合した構造である。即ち、前記肘掛け部６は、回転軸５６を中心として水平に角度を調節することができるとともに、前記クリック部材５５に対してガイド溝５４をスライド移動させることにより、肘掛け部６を左右横移動させることができるのである。
【００２１】
更に詳しくは、前記上部カバー部材２６の内部下面には、多数の補強リブ５８，…を縦横に格子状に形成し、各補強リブ５８の端面は面一に設定し、該補強リブ５８を取り囲むように高さの高い枠リブ５９を形成し、中央部には幅方向に渡って補強リブ５８が存在しない部分を形成し、該部分を前記ガイド溝５４となしている。そして、該ガイド溝５４は幅方向に延びた補強リブ５８，５８で両側壁５８Ａ，５８Ａが形成され、上部カバー部材２６の幅方向の中心位置と、該中心から同距離離れた位置の側壁５８Ａ，５８Ａの一部に切欠部６０，…を形成している。
【００２２】
前記クリック部材５５は、図９に示すように、外形が平面視略円形の合成樹脂製であり、上面側に前記ガイド溝５４に係合する長円部６１を形成し、下面側に前記傾動部材９の円孔５７に回転可能に係合する回転軸５６を形成し、上下中間部には長円部６１の一端部に連続し、１／４周した位置から長円部６１の一側面に屈曲した弾性片６２を形成し、長円部６１の他端部から同様に弾性片６２が延び、各弾性片６２，６２の先端には半円柱状の摺動部６３，６３を長円部６１と同一高さに形成している。更に、前記摺動部６３，６３に対応する長円部６１の両側面には該摺動部６３，６３を退避させる凹部６４，６４を形成している。そして、前記傾動部材９の上面板１９の円孔５７にクリック部材５５の回転軸５６を挿入した状態で、該クリック部材５５の長円部６１を前記上部カバー部材２６のガイド溝５４に弾性的に係合し、該傾動部材９の前後両端部のスライダー５２，５２を上部カバー部材２６の枠リブ５９にネジ止めした取付板５３，５３で移動可能に保持して取付けるのである。ここで、前記取付板５３は、前記枠リブ５９に取付ける固定部６５と、スライダー５２の上面に摺接する押え部６６と、固定部６５と押え部６６との間に垂直部６７を有し、該垂直部６７には前記スライダー５２を挿通する横長開口６８を形成している。前記取付板５３で、スライダー５２を保持した状態では、該スライダー５２は押え部６６と固定部６５とに互いに摺接し、その接触圧を確保するために、スライダー５２を前記保持板２１に嵌合する内部に低いリブ６９を複数形成している。
【００２３】
そして、前記クリック部材５５の長円部６１は、前記ガイド溝５４の両側壁５８Ａ，５８Ａ間に係合し、両摺動部６３，６３が側壁５８Ａ，５８Ａに弾性的に圧接される。図１１に示すように、前記肘掛け部６を左右横方向に移動させると、クリック部材５５がガイド溝５４に沿って相対的に移動し、ガイド溝５４の中央部とその両側部に切欠部６０，…に摺動部６３，６３が位置すると、その弾性力によってその位置に止まるが、強く肘掛け部６を移動させると、摺動部６３，６３が切欠部６０，６０から外れて移動するのである。つまり、肘掛け部６を支持部５に対して中央部と、左右の３ヵ所に横移動させて調節することが可能である。また、肘掛け部６を支持部５に対して中央部に位置させた状態では、前記回転軸５６を中心に左右に所定角度だけ回転させることができ、左右角度調節ができるのである。
【００２４】
ここで、前記上部カバー部材２６と下部カバー部材２７との接合構造について簡単に説明する。前記上部カバー部材２６の周縁にはその内側縁に沿って内側段部７０を形成し、前記下部カバー部材２７の周縁にはその外側縁に沿って外側段部７１を形成し、互いに内外に嵌合するようになっている。そして、上部カバー部材２６の前後一方の内側段部７０には内向きに突起７２を形成するとともに、下部カバー部材２７の対応する側の外側段部７１には前記突起７２を係合する連結孔７３を形成し、上部カバー部材２６の前後他方の内部には台座７４，７４を形成し、下部カバー部材２７の対応する側には取付孔７５，７５を形成し、前記突起７２を連結孔７３に係合するとともに、前記取付孔７５に下方から挿通したネジ７６を台座７４に螺合して互いに接合するのである。また、両部材とも合成樹脂製で成形したものであるので、両側面を押圧すると上部カバー部材２６は前記内側段部７０と外側段部７１の嵌合関係によって内向きの変形は抑制されるが、下部カバー部材２７は前記内側段部７０と外側段部７１の嵌合関係だけでは内向きの変形は抑制できない。そのため、前記上部カバー部材２６の周縁部であって、前記枠リブ５９から連続した規制爪７７，…を突設し、該規制爪７７で下部カバー部材２７の内向き変形を防止している。
【００２５】
このように、前記肘掛け部６は、支持部５に対して左右移動可能、左右角度調節可能となっているので、前記下部カバー部材２７に形成した開口２８の横幅は左右移動距離を考慮して広く設定されているとともに、上下角度調節可能となっているため、前記開口２８の前後幅は若干余裕をもって広く設定している。そのため、前記肘掛け部６の前部を高くして上向き傾斜させた場合、保護カバー７８がなければ、図３に示すように前記傾動部材９等の金具や支軸１０の周囲部が露出し、この露出部分に指を挟む恐れがあるので、前記傾動部材９には、図５、図６、図１２及び図１３に示すように、保護カバー７８を設けて指詰めを防止している。尚、前記支持部５に対して肘掛け部６を左右に移動させた場合に、保護カバー７８と開口２８の口縁との間に指が挟まれないように、また指を挟まれても大きな怪我をしないように最低６ｍｍの隙間を形成している。
【００２６】
前記保護カバー７８は、前記下部カバー部材２７の開口２８内に位置し、前記傾動部材９に外嵌して取付ける。この保護カバー７８の外形は、上方広がりの形状を有し、中央部に前記支持部５を受け入れる開口部７９を形成し、前端には内向きに突片８０を設け、前記傾動部材９の両側面板２０，２０の前端に形成した凹部８１，８１に係合するとともに、両側板８２，８２の後部内面に形成した係止爪８３，８３を、前記傾動部材９の側面板２０，２０の後部に形成した係合孔８４，８４に抜止め係合して取付けるのである。また、保護カバー７８の前後部には、前記回動部材１４の動作を逃がすためと、傾動部材９の両側面板２０，２０を逃がすための切欠開口８５を形成している。また、両側板８２，８２の内面には、前記昇降体８の上端部に弾力的に嵌合するように縦方向のリブ８６，…を形成している。尚、前記保護カバー７８の形状は、前記傾動部材９の形状に応じて決定されるべきであり、特にその形状は限定されるものではない。
【００２７】
また、前記肘掛け部６の左右横移動、左右角度調節機構の他の例として、図１４に示したものは、前記傾動部材９の上面板１９の中央部に軸部８７を突設し、該軸部８７を中央部と、その左右両側部で弾性係合するＣ字形の係合部８８，８８をその開放部を対面させて上部カバー部材２６の下面に突設したものである。この場合、両係合部８８，８８の間に軸部８７が係合した場合には、肘掛け部６は左右角度調節可能であり、また軸部８７を一方の係合部８８に嵌入すれば左右横移動することになる。
【００２８】
また、本実施形態に係る肘掛け部６は、左右横移動可能となしたので、必然的に横幅を広くなり、下面に設けた操作レバー１１の操作部１２を操作し難くなるが、操作性を向上させるために、前記下部カバー部材２７の左右両側下面に傾斜面２７Ａ，２７Ａを形成して、指の操作部１２への回り込みを良くしている。
【００２９】
最後に、高さ調節機構を図２〜図４に基づいて簡単に説明する。高さ調節機構は、前記支持アーム７の上端部に延設した支持板４３の中央部に沿って縦孔８９を形成し且つ該縦孔８９の前縁に一定間隔毎に係合凹部９０，…を形成し、前記昇降体８の前部であって前記支持板４３に対応する位置に開口９１を形成するとともに、該開口９１に臨んだ内部に前後に延びたガイド部９２を形成し、該ガイド部９２内に前記係合凹部９０又は縦孔８９に貫通した係合ピン９３の両端部を前後から抱持する一対の作動部材９４，９５を前後スライド可能に設けるとともに、内方の作動部材９５と昇降体８の内壁９６間に圧縮コイルばねからなる弾性体９７を配して前方へ弾性付勢し、前記開口９１内に前後回動可能に上下一端部を枢着した操作レバー９８の遊端部に一体形成した弾性片９９を前記外側の作動部材９４に当接してなるものである。
【００３０】
そして、前記肘掛け部６の高さを調節する場合には、前記操作レバー９８の下部を開口９１内に押し込めば、前記弾性体９７の弾性付勢力に抗して更に係合ピン９３が押し込まれ、前記縦孔８９の位置に達すると、肘掛け部６を持ってその高さを調節することが可能となる。肘掛け部６を持って上下に移動させて所定の高さになると、操作レバー９８から指を離せば、弾性体９７の前方への弾性付勢力によって係合ピン９３が何れかの係合凹部９０に係合し、設定高さを維持するのである。
【００３１】
【発明の効果】
以上にしてなる本発明の椅子の肘掛け装置は、座部又は脚部から立ち上がった支持部に対して肘掛け部が上下角度調節可能且つ左右横移動及び／又は左右角度調節可能な椅子の肘掛け装置における肘掛け部の上下角度調節機構において、肘掛け部のカバー部材に操作レバーを設け、その操作部を露出させるための操作孔を最小限の大きさに設定することができるにもかかわらず、肘掛け部の左右横移動、左右角度調節と併せて上下角度調節を行うことができるのである。
【図面の簡単な説明】
【図１】本発明の肘掛け装置を適用した椅子の側面図である。
【図２】同じく肘掛け部を水平状態に設定した場合の縦断面図である。
【図３】同じく肘掛け部を傾斜状態に設定した場合の縦断面図である。
【図４】支持部と肘掛け部を枢着する構造を示す分解斜視図である。
【図５】本発明る要部を示す分解斜視図である。
【図６】傾動部材と保護カバーの関係を示す分解斜視図である。
【図７】肘掛け部のカバー部材の構造を示す分解断面図である。
【図８】上部カバー部材の斜視図である。
【図９】クリック部材を示し、(a) は平面図、(b) は側面図である。
【図１０】クリック部材を装着した状態の部分断面図である。
【図１１】左右横移動、左右角度調節機構を示す簡略断面図である。
【図１２】保護カバーを取付けた状態を示す省略側面図である。
【図１３】同じく省略底面図である。
【図１４】左右横移動、左右角度調節機構の他の例を示す省略断面図である。
【図１５】肘掛け部に手を掛けて操作レバーの操作状態を示した簡略説明図である。
【符号の説明】
１脚部２座部
３背凭れ部４肘掛け装置
５支持部６肘掛け部
７支持アーム８昇降体
９傾動部材１０支軸
１１操作レバー１２操作部
１３係合凹部１４回動部材
１５操作杆１６作動杆
１７係合ピン１８弾性体
１９上面板２０側面板
２１保持板２２軸孔
２３軸ピン２４通孔
２５長孔２６上部カバー部材
２７下部カバー部材２８開口
２９操作孔３０軸部
３１軸受部３２軸受孔
３３軸筒３４係止部
３５ラック部材３６側片
３７ブロック体３８係合爪
３９支持片４０突部
４１基板４２係合穴
４３支持板４４摺動孔
４５垂直板４６係止孔
４７爪片４８軸受部
４９保持片５０軸孔
５１軸孔５２スライダー
５３取付板５４ガイド溝
５５クリック部材５６回転軸
５７円孔５８補強リブ
５９枠リブ６０切欠部
６１長円部６２弾性片
６３摺動部６４凹部
６５固定部６６押え部
６７垂直部６８横長開口
６９リブ７０内側段部
７１外側段部７２突起
７３連結孔７４台座
７５取付孔７６ネジ
７７規制爪７８保護カバー
７９開口部８０突片
８１凹部８２側板
８３係止爪８４係合孔
８５切欠開口８６リブ
８７軸部８８係合部
８９縦孔９０係合凹部
９１開口９２ガイド部
９３係合ピン９４作動部材
９５作動部材９６内壁
９７弾性体９８操作レバー
９９弾性片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest device for a chair, and more particularly to an armrest device for a chair whose armrest portion can be adjusted in the vertical angle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has already been provided an armrest portion whose vertical angle can be adjusted with respect to a support portion rising from a seat portion or a leg portion of a chair. As the angle adjustment mechanism of the armrest part, a tilting member attached to the inside of the armrest part is pivotally attached to the upper end of the support part, and a plurality of engaging recesses are formed in the support part at predetermined intervals in the vertical direction. In some cases, the engaging recess is elastically fitted with an engaging projection provided in the armrest portion, and the angle is adjusted in multiple stages.
[0003]
However, the conventional angle adjustment mechanism of the armrest part is an operation in which an operating lever for engaging and disengaging the engaging protrusion with respect to the engaging recess is attached to the cover member constituting the armrest part, while the engaging protrusion is provided. The member is attached to the tilting member, and the operating lever and the operating member are linked directly or indirectly, or the engaging protrusion is integrally formed at the free end of the operating lever. Or the structure which latched the engaging pin etc. is taken.
[0004]
Therefore, it has been impossible to laterally move or rotate the cover member of the armrest portion relative to the tilting member. In addition, it is considered that all members such as the operation lever related to the vertical angle adjustment mechanism are attached to the tilting member. In that case, an operation hole for exposing the operation portion of the operation lever from the cover member is provided. Since it must be made sufficiently large, the appearance is also inferior, and there is a risk that a finger may be caught between the operation portion and the edge of the operation hole, which is not realistic.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem of the chair in which the armrest portion can be adjusted in the vertical direction and the horizontal movement and / or the horizontal angle can be adjusted with respect to the support portion rising from the seat portion or the leg portion. In the armrest unit vertical angle adjustment mechanism in the armrest device, it is possible to provide an operation lever on the cover member of the armrest portion and set the operation hole for exposing the operation portion to a minimum size. It is the point which provides the armrest apparatus of the chair which can perform an up-and-down angle adjustment in combination with the right-and-left lateral movement and left-right angle adjustment.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a chair armrest device in which an armrest portion can be adjusted in a vertical angle and can be laterally moved and / or adjusted in a horizontal direction with respect to a support portion rising from a seat portion or a leg portion. The tilting member is connected to the upper end of the support portion so as to be vertically tiltable by a horizontal support shaft, and the cover member of the armrest portion is attached to the tilting member so as to be laterally movable and / or rotatable. An operation lever is attached to the front part of the support part so as to be able to tilt up and down, and the operation part is exposed on the lower surface. An operating rod extending forward of a rotating member pivotally attached to the portion abuts the upper surface of the operating lever, and an engaging pin locked to the tip of the operating rod extending downward of the rotating member is engaged. It is possible to engage with the recess, and the rotating part The engagement pin constituted the armrest device of the chair formed by elastically urged in the rotational direction to engage the engaging recess.
[0007]
Specifically, the lateral width of the operating lever is such that the tip of the operating rod of the rotating member always abuts against the upper surface of the operating lever even when the cover member is laterally moved or rotationally displaced with respect to the tilting member. It is set as follows. In addition, long holes are formed in both side plates of the tilting member along a locus along which the engaging pin moves as the rotating member rotates, and both end portions of the engaging pin can slide within the long hole. The engaging recess is formed in a metal rack member, the rack member is fitted to the front upper end portion of the block body, and the block body is placed in the upper end portion of the cylindrical support portion. It is also preferable that the rack member is fixed to the upper end portion of the support portion by fitting.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 shows a chair according to the present invention, FIG. 2 shows a state in which an armrest portion is set horizontally, FIG. 3 shows a state in which the front portion of the armrest portion is inclined upward, and FIGS. 4 to 15 show details of each portion. In the figure, reference numeral 1 denotes a leg portion of the chair, 2 denotes a seat portion, 3 denotes a backrest portion, 4 denotes an armrest device, 5 denotes a support portion, and 6 denotes an armrest portion.
[0009]
The armrest device 4 according to the embodiment of the present invention is capable of adjusting the height of the armrest portion 6 with respect to the support portion 5 standing up from the seat portion 2 or the leg portion 1, adjustable in the vertical angle, laterally movable, and laterally adjustable. Is provided. However, since the armrest device 4 according to the present invention is characterized by the vertical angle adjustment mechanism, the horizontal movement, and the horizontal angle adjustment mechanism, it is not essential whether the armrest portion 6 can be adjusted in height.
[0010]
The support portion 5 includes a support arm 7 and a lift body 8. A hollow cylindrical lift body 8 that is attached to the armrest portion 6 and is opened up and down is mounted on the top of the support arm 7 fixed to the seat portion 2. It has a structure that is movably fitted. A height adjusting mechanism is provided between the support arm 7 and the lifting body 8 to adjust the height of the lifting body 8 with respect to the support arm 7 and to maintain the height.
[0011]
As shown in FIGS. 2 to 5, the vertical angle adjusting mechanism connects the tilting member 9 to the upper end of the support portion 5 so as to be tiltable up and down with a horizontal support shaft 10, and the tilting member 9 is connected to the armrest portion. in the accommodated state within 6, is attached to the armrest 6 traversing and / or rotatable with respect to the tilting member 9, the operation of the operation lever 11 to the front portion of the armrest 6 mounted to be vertically tilted Is formed on the front surface side of the upper end portion of the support portion 5, and a plurality of engagement recesses 13 are formed on the front surface of the upper end portion of the support portion 5. An operating pin 15 extending forward is brought into contact with the upper surface of the operating lever 11, and an engaging pin 17 engaged with a tip of an operating rod 16 extending downward of the rotating member 14 is provided in the engaging recess 13. The engaging member 17 is engaged, and the rotating member 14 is engaged with the engaging pin 17. Is made of elastically urged by an elastic member 18 provided in the rotation direction to be engaged with the recess 13 between the the pivoting member 14 and the tilting member 9.
[0012]
More specifically, the tilting member 9 is formed by bending a metal plate. The side plates 20 and 20 are suspended from both side edges of the upper surface plate 19 and the front and rear ends of the upper surface plate 19 are extended to hold the holding plate. 21 and 21 are formed, and the front portion of the side plate 20 has a shape that extends downward. In addition, shaft holes 22 and 22 for inserting the support shaft 10 are formed in the rear portions of the side plates 20 and 20, and the rotating member 14 is provided at the upper ends of the front portions of the side plates 20 and 20. Through holes 24 and 24 for inserting shaft pins 23 that are rotatably supported are formed, and a locus along which the engaging pins 17 move as the rotating member 14 rotates at the lower end of the front portion. In other words, long holes 25, 25 directed to the shaft hole 22 are formed, and both end portions of the engagement pin 17 are slidably engaged in the long holes 25, 25.
[0013]
The armrest portion 6 is formed by joining an upper cover member 26 and a lower cover member 27 made of a synthetic resin to form a hollow inside, and the tilting member 9 is moved laterally to the upper cover member 26. The lower cover member 27 is formed with an opening 28 for receiving the support portion 5 and an operation hole 29 for exposing the operation portion 12 of the operation lever 11.
[0014]
The operation lever 11 has shaft portions 30 and 30 formed on a plate-like base portion, and the operation portion 12 protrudes from a lower portion on the free end side. The lateral width of the operating lever 11 is such that the tip of the operating rod 15 of the rotating member 14 is always the upper surface of the operating lever 11 even when the cover members 26, 27 are laterally moved or rotationally displaced with respect to the tilting member 9. It is set sufficiently wide so that it abuts. The shaft portion 30 has a shape that is flat in a direction perpendicular to the plate surface of the operation lever 11, and protrudes inwardly from the lower cover member 27 to pivotally support the shaft portion 30. The bearing portion 31 is provided with a gap corresponding to the flat width of the shaft portion 30 on the rear side, a bearing hole 32 that rotatably receives the shaft portion 30 is formed therein, and the operation lever 11 is erected in a state where the operation lever 11 is raised. The part 30 is inserted into the bearing hole 32, and then the operation part 12 is attached so as to be inserted into the operation hole 29. In this attached state, the shaft portion 30 does not come out of the bearing hole 32.
[0015]
The rotating member 14 forms a shaft cylinder 33 through which the shaft pin 23 is inserted at the center, and the operating rod 15 extends forward from the shaft tube 33, and the tip of the operating rod 15 is The operating rod 16 is parallel to the upper surface of the operation lever 11 and extends downward from the shaft tube 33, and the tip of the operating rod 16 has a U-shaped locking portion 34 for receiving the engaging pin 17. It has become.
[0016]
The engaging recesses 13,... Form both side pieces 36 of a metal rack member 35 formed in a substantially U shape in a plan view, and the rack member 35 is fitted to the front upper end portion of the synthetic resin block body 37. The rack member 35 is fixed to the upper end portion of the elevating body 8 by fitting the block body 37 in the upper end portion of the cylindrical elevating body 8, so A plurality of engaging recesses 13 are formed. Here, a downward engaging claw 38 is formed on the upper edge of the front surface of the block body 37, and a horizontal support piece 39 is provided at a distance below the engaging claw 38. A front surface on the upper side of the support piece 39. And the upper edge of the substrate 41 of the rack member 35 is engaged with the engagement claw 38, and the lower edge is in contact with the support piece 39 and is formed on the substrate 41. By fitting the hole 42 into the protrusion 40 and inserting the block body 37 into the upper end of the lifting body 8 in this state, the both side pieces 36, 36 of the rack member 35 are brought into contact with the inner surface of the lifting body 8. The rack member 35 is completely fixed.
[0017]
Further, the block body 37 is formed with a sliding hole 44 vertically penetrating therein for slidably receiving a metal support plate 43 provided at the upper end of the support arm 7. Further, the structure for fixing the block body 37 to the elevating body 8 is such that the claw piece 47 provided at the lower end of the front surface of the block body 37 is provided in the locking hole 46 provided in the vertical plate 45 integrally formed in the elevating body 8. A bearing portion 48 projecting from the upper end of the rear surface of the block body 37 is fitted between a pair of holding pieces 49, 49 provided at the upper rear end of the elevating body 8. The shaft holes 50 and 50 provided in 49 and the shaft hole 51 provided in the bearing portion 48 are used as a common hole, and the support shaft 10 that pivotally supports the armrest portion 6 so as to be pivotable up and down is inserted and connected.
[0018]
In order to adjust the vertical angle of the armrest portion 6, when the operation portion 12 of the operation lever 11 is pushed upward, the operation lever 11 rotates upward and the operation rod 15 of the rotating member 14 is moved upward. The rotating member 14 rotates against the elastic urging force of the elastic body 18, and the engaging pin 17 locked to the tip end of the operating rod 16 passes through the long holes 25, 25 of the tilting member 9. In this state, the front part of the armrest part 6 can be rotated up and down around the support shaft 10, and the finger is released from the operation part 12 after setting to a predetermined angle. For example, the engagement pin 17 is engaged with the corresponding engagement recess 13 by the elastic biasing force of the elastic body 18, and the set angle is maintained.
[0019]
As the elastic body 18, an example using a kick spring in which a coil portion is wound around the shaft cylinder 33 of the rotating member 14 and both elastic legs are engaged with the upper surface plate 19 of the tilting member 9 and the operation rod 15 is used. Although shown, it is possible to use a compression coil spring or a tension coil spring. However, since the upper cover member 26 and the lower cover member 27 are displaced relative to the tilting member 9, the elastic body 18 is provided between the tilting member 9 and the rotating member 14 that is displaced together with the tilting member 9. Should.
[0020]
Next, the left / right lateral movement and left / right angle adjustment mechanism of the armrest 6 will be described with reference to FIGS. 2, 3, 5, and 7 to 11. In this lateral movement and lateral angle adjustment mechanism, sliders 52 and 52 are respectively fitted to horizontal holding plates 21 and 21 provided at the front and rear ends of the tilting member 9, and the upper cover member is interposed via the sliders 52 and 52. 26 is attached to the inner upper surface of the inner cover 26 so as to be laterally movable by mounting plates 53, 53, and a guide groove 54 is provided in the width direction of the inner upper surface of the upper cover member 26, and the click member 55 can be moved along the guide groove 54. In addition to the fitting, the rotary shaft 56 protruding below the click member 55 is rotatably fitted in a circular hole 57 formed in the central portion of the upper surface plate 19 of the tilting member 9. In other words, the armrest portion 6 can adjust the angle horizontally around the rotation shaft 56, and the armrest portion 6 can be laterally moved by sliding the guide groove 54 with respect to the click member 55. It can be done.
[0021]
More specifically, a large number of reinforcing ribs 58 are formed on the inner lower surface of the upper cover member 26 in the form of a lattice in the vertical and horizontal directions, and the end surfaces of the reinforcing ribs 58 are set flush and surround the reinforcing ribs 58. The frame rib 59 having a high height is formed as described above, and a portion where the reinforcing rib 58 does not exist in the width direction is formed in the center portion, and this portion serves as the guide groove 54. The guide groove 54 has both side walls 58A, 58A formed by reinforcing ribs 58, 58 extending in the width direction, and the side wall 58A at the center position in the width direction of the upper cover member 26 and at the same distance from the center. , 58A are formed with notches 60,.
[0022]
As shown in FIG. 9, the click member 55 is made of a synthetic resin having a substantially circular outer shape in plan view, and has an oval portion 61 that engages with the guide groove 54 on the upper surface side, and the tilt on the lower surface side. A rotary shaft 56 that is rotatably engaged with the circular hole 57 of the member 9 is formed, and one side surface of the oval part 61 is formed from a position that is continuous with one end of the oval part 61 in the upper and lower intermediate part and is ¼. The elastic piece 62 is bent in the same manner, the elastic piece 62 extends from the other end of the oval part 61 in the same manner, and semi-cylindrical sliding parts 63 and 63 are formed at the ends of the elastic pieces 62 and 62, respectively. It is formed at the same height as the portion 61. Further, concave portions 64 and 64 for retracting the sliding portions 63 and 63 are formed on both side surfaces of the oval portion 61 corresponding to the sliding portions 63 and 63. Then, in a state where the rotation shaft 56 of the click member 55 is inserted into the circular hole 57 of the upper surface plate 19 of the tilting member 9, the oval part 61 of the click member 55 is elastically formed in the guide groove 54 of the upper cover member 26. The sliders 52 and 52 at both front and rear ends of the tilting member 9 are movably held and attached by mounting plates 53 and 53 screwed to the frame rib 59 of the upper cover member 26. Here, the mounting plate 53 includes a fixing portion 65 that is attached to the frame rib 59, a pressing portion 66 that is in sliding contact with the upper surface of the slider 52, and a vertical portion 67 between the fixing portion 65 and the pressing portion 66. In the vertical portion 67, a horizontally long opening 68 through which the slider 52 is inserted is formed. In a state where the slider 52 is held by the mounting plate 53, the slider 52 is slidably brought into contact with the pressing portion 66 and the fixing portion 65, and the slider 52 is fitted to the holding plate 21 in order to secure the contact pressure. A plurality of low ribs 69 are formed inside.
[0023]
The oval portion 61 of the click member 55 is engaged between both side walls 58A and 58A of the guide groove 54, and both sliding portions 63 and 63 are elastically pressed against the side walls 58A and 58A. As shown in FIG. 11, when the armrest portion 6 is moved in the lateral direction, the click member 55 moves relatively along the guide groove 54, and the notches 60 are formed in the center portion and both sides of the guide groove 54. When the sliding parts 63, 63 are located at the position, they stop at that position due to their elastic force. However, if the armrest part 6 is moved strongly, the sliding parts 63, 63 move away from the notches 60, 60. is there. That is, the armrest portion 6 can be adjusted by laterally moving the armrest portion 6 with respect to the support portion 5 at the central portion and the left and right three locations. Further, in a state where the armrest portion 6 is positioned at the center portion with respect to the support portion 5, the armrest portion 6 can be rotated by a predetermined angle left and right around the rotation shaft 56, and the left and right angle adjustment can be performed.
[0024]
Here, a joining structure between the upper cover member 26 and the lower cover member 27 will be briefly described. An inner step 70 is formed along the inner edge of the upper cover member 26 along the inner edge thereof, and an outer step 71 is formed along the outer edge of the lower cover member 27 along the inner edge thereof. It comes to match. A projection 72 is formed inward on one of the front and rear inner step portions 70 of the upper cover member 26, and a connecting hole for engaging the projection 72 on the corresponding outer step portion 71 of the lower cover member 27. 73, pedestals 74, 74 are formed in the other front and rear of the upper cover member 26, attachment holes 75, 75 are formed on the corresponding sides of the lower cover member 27, and the protrusion 72 is connected to the connection hole 73. And a screw 76 inserted from below into the mounting hole 75 is screwed into the base 74 and joined together. Further, since both members are made of synthetic resin, when the both side surfaces are pressed, the upper cover member 26 is restrained from inward deformation due to the fitting relationship between the inner step portion 70 and the outer step portion 71. The lower cover member 27 cannot suppress inward deformation only by the fitting relationship between the inner stepped portion 70 and the outer stepped portion 71. For this reason, restriction claws 77,..., Which protrude from the peripheral edge of the upper cover member 26 and continue from the frame rib 59, are provided to prevent inward deformation of the lower cover member 27.
[0025]
As described above, the armrest portion 6 can be moved left and right with respect to the support portion 5 and the left and right angles can be adjusted. Therefore, the lateral width of the opening 28 formed in the lower cover member 27 takes into account the left and right movement distance. Since it is set wide and the vertical angle can be adjusted, the front-rear width of the opening 28 is set wide with a slight margin. Therefore, when the front portion of the armrest 6 is raised and inclined upward, if there is no protective cover 78, the metal fittings such as the tilting member 9 and the periphery of the support shaft 10 are exposed as shown in FIG. Since there is a possibility that a finger may be caught in the exposed portion, the tilting member 9 is provided with a protective cover 78 to prevent finger filling as shown in FIGS. 5, 6, 12 and 13. It should be noted that when the armrest portion 6 is moved left and right with respect to the support portion 5, it is large so that the finger is not caught between the protective cover 78 and the lip of the opening 28. A gap of at least 6 mm is formed to prevent injury.
[0026]
The protective cover 78 is located in the opening 28 of the lower cover member 27 and is attached to the tilting member 9 by being externally fitted. The outer shape of the protective cover 78 has an upwardly expanding shape, an opening 79 for receiving the support portion 5 is formed at the center, a protrusion piece 80 is provided at the front end, and both sides of the tilting member 9 are provided. The engaging claws 83, 83 formed on the rear inner surfaces of the side plates 82, 82 are engaged with the recesses 81, 81 formed at the front ends of the face plates 20, 20, and the rear portions of the side plates 20, 20 of the tilting member 9. The engagement holes 84, 84 formed in the above-mentioned are fixedly engaged and attached. In addition, notches 85 are formed in the front and rear portions of the protective cover 78 in order to release the operation of the rotating member 14 and to release the side plates 20 and 20 of the tilting member 9. Further, longitudinal ribs 86,... Are formed on the inner surfaces of the side plates 82, 82 so as to be elastically fitted to the upper end portion of the elevating body 8. The shape of the protective cover 78 should be determined according to the shape of the tilting member 9, and the shape is not particularly limited.
[0027]
Further, as another example of the left / right lateral movement and left / right angle adjustment mechanism of the armrest portion 6, the one shown in FIG. 14 has a shaft portion 87 protruding from the center portion of the upper surface plate 19 of the tilting member 9, C-shaped engaging portions 88 and 88 that elastically engage the shaft portion 87 at the center portion and both left and right side portions thereof are provided so as to protrude from the lower surface of the upper cover member 26 with their open portions facing each other. In this case, when the shaft portion 87 is engaged between the both engaging portions 88, 88, the armrest portion 6 can be adjusted in the left-right angle, and if the shaft portion 87 is fitted into one engaging portion 88. It will move from side to side.
[0028]
In addition, since the armrest portion 6 according to the present embodiment can be moved laterally from side to side, the width is inevitably widened, and it becomes difficult to operate the operation portion 12 of the operation lever 11 provided on the lower surface. In order to improve, inclined surfaces 27A and 27A are formed on the lower surfaces of the left and right sides of the lower cover member 27 to improve the wrapping of the finger into the operation unit 12.
[0029]
Finally, the height adjusting mechanism will be briefly described with reference to FIGS. The height adjusting mechanism is formed with a vertical hole 89 along the central portion of the support plate 43 extending at the upper end of the support arm 7 and is formed with an engaging recess 90 at a predetermined interval on the front edge of the vertical hole 89. ..., and an opening 91 is formed at a position corresponding to the support plate 43 at the front portion of the elevating body 8, and a guide portion 92 extending back and forth is formed in the interior facing the opening 91, A pair of actuating members 94 and 95 that hold both end portions of the engaging pin 93 penetrating the engaging recess 90 or the vertical hole 89 from the front and rear are provided in the guide portion 92 so as to be slidable in the front and rear directions, and inwardly operated. An operating body 98 having an elastic body 97 made of a compression coil spring disposed between the member 95 and the inner wall 96 of the elevating body 8 and elastically energized forward, and pivotally mounted at the upper and lower ends in the opening 91 so as to be able to rotate back and forth. The elastic piece 99 formed integrally with the free end of the outer working member 9 It is made in contact with.
[0030]
When adjusting the height of the armrest 6, if the lower part of the operation lever 98 is pushed into the opening 91, the engagement pin 93 is further pushed against the elastic biasing force of the elastic body 97. When the position of the vertical hole 89 is reached, the armrest 6 can be held and the height thereof can be adjusted. When the armrest 6 is moved up and down to reach a predetermined height, when the finger is released from the operation lever 98, the engagement pin 93 is engaged with any of the engagement recesses 90 by the elastic biasing force forward of the elastic body 97. To maintain the set height.
[0031]
【The invention's effect】
The armrest device for a chair according to the present invention as described above is an armrest device for a chair in which the armrest portion can be adjusted in the vertical and horizontal directions and / or the horizontal angle can be adjusted with respect to the support portion rising from the seat or the leg. In the armrest section vertical angle adjustment mechanism, an operating lever is provided on the cover member of the armrest section, and the operation hole for exposing the operation section can be set to the minimum size, but the armrest section The vertical angle adjustment can be performed together with the horizontal movement and the horizontal angle adjustment.
[Brief description of the drawings]
FIG. 1 is a side view of a chair to which an armrest device of the present invention is applied.
FIG. 2 is a longitudinal sectional view when the armrest is set in a horizontal state.
FIG. 3 is a longitudinal sectional view when the armrest is set in an inclined state.
FIG. 4 is an exploded perspective view showing a structure for pivotally attaching a support portion and an armrest portion.
FIG. 5 is an exploded perspective view showing a main part of the present invention.
FIG. 6 is an exploded perspective view showing the relationship between the tilting member and the protective cover.
FIG. 7 is an exploded sectional view showing a structure of a cover member of an armrest portion.
FIG. 8 is a perspective view of an upper cover member.
9A and 9B show a click member, where FIG. 9A is a plan view and FIG. 9B is a side view.
FIG. 10 is a partial cross-sectional view showing a state where a click member is mounted.
FIG. 11 is a simplified cross-sectional view showing a lateral movement and a lateral angle adjustment mechanism.
FIG. 12 is an abbreviated side view showing a state where a protective cover is attached.
FIG. 13 is a similar bottom view.
FIG. 14 is an abbreviated cross-sectional view showing another example of a lateral movement and lateral angle adjustment mechanism.
FIG. 15 is a simplified explanatory view showing the operation state of the operation lever by placing a hand on the armrest portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest apparatus 5 Support part 6 Armrest part 7 Support arm 8 Lifting body 9 Tilt member 10 Support axis 11 Operation lever 12 Operation part 13 Engaging recessed part 14 Turning member 15 Operation rod 16 Actuation杆 17 engaging pin 18 elastic body 19 upper surface plate 20 side surface plate 21 holding plate 22 shaft hole 23 shaft pin 24 through hole 25 long hole 26 upper cover member 27 lower cover member 28 opening 29 operation hole 30 shaft portion 31 bearing portion 32 bearing Hole 33 Axle tube 34 Locking portion 35 Rack member 36 Side piece 37 Block body 38 Engaging claw 39 Supporting piece 40 Protruding portion 41 Substrate 42 Engaging hole 43 Support plate 44 Sliding hole 45 Vertical plate 46 Locking hole 47 Claw piece 48 Bearing portion 49 Holding piece 50 Shaft hole 51 Shaft hole 52 Slider 53 Mounting plate 54 Guide groove 55 Click member 56 Rotating shaft 57 Circular hole 58 Reinforcement rib 59 Frame rib 60 Notch portion 61 Oval portion 62 Elastic piece 63 Sliding portion 64 Recessed portion 65 Fixed portion 66 Presser portion 67 Vertical portion 68 Horizontal opening 69 Rib 70 Inner step portion 71 Outer step portion 72 Projection 73 Connection hole 74 Base 75 Mounting hole 76 Screw 77 Restriction claw 78 Protective cover 79 Opening 80 Projection piece 81 Recess 82 Side plate 83 Locking claw 84 Engagement hole 85 Notch opening 86 Rib 87 Shaft part 88 Engagement part 89 Vertical hole 90 Engagement recessed part 91 Opening 92 Guide part 93 Engagement Pin 94 Actuating member 95 Actuating member 96 Inner wall 97 Elastic body 98 Operation lever 99 Elastic piece

Claims

座部又は脚部から立ち上がった支持部に対して肘掛け部が上下角度調節可能且つ左右横移動及び／又は左右角度調節可能な椅子の肘掛け装置であって、前記支持部の上端に傾動部材を水平な支軸にて上下傾動可能に連結し、該傾動部材に対して肘掛け部のカバー部材を横移動及び／又は回転可能に取付けるとともに、前記カバー部材の前部に操作レバーを上下傾動可能に取付けてその操作部を下面に露出させ、前記支持部の上端部前面側に上下に複数の係合凹部を形成し、中央部を前記傾動部材の前部に枢着した回動部材の前方へ延びた操作杆を前記操作レバーの上面に当接するとともに、前記回動部材の下方へ延びた作動杆の先端に係止した係合ピンを前記係合凹部に係合可能となし、更に前記回動部材を係合ピンが係合凹部に係合する回転方向に弾性付勢してなることを特徴とする椅子の肘掛け装置。An armrest device of a chair in which an armrest portion can be adjusted in vertical angle and laterally movable and / or adjustable in left and right angles with respect to a support portion rising from a seat portion or a leg portion, and a tilting member is horizontally disposed on an upper end of the support portion It is connected so that it can be tilted up and down with a support shaft, and the cover member of the armrest is attached to the tilting member so that it can be moved laterally and / or rotated. The operation portion is exposed on the lower surface, a plurality of engagement recesses are formed on the front surface side of the upper end portion of the support portion, and the center portion extends forward of the rotating member pivotally attached to the front portion of the tilting member. The operating rod is brought into contact with the upper surface of the operating lever, and an engaging pin engaged with the tip of the operating rod extending downward from the rotating member can be engaged with the engaging recess, and further the rotating When the engaging pin engages with the engaging recess, Armrest apparatus chair and characterized by being elastically urged in the direction.

前記操作レバーの横幅は、前記傾動部材に対して前記カバー部材が横移動又は回転変位しても、常に前記回動部材の操作杆の先端が該操作レバーの上面に当接するように設定してなる請求項１記載の椅子の肘掛け装置。The lateral width of the operating lever is set so that the tip of the operating rod of the rotating member is always in contact with the upper surface of the operating lever even when the cover member is laterally moved or rotationally displaced with respect to the tilting member. The chair armrest device according to claim 1.

前記回動部材の回動に伴って前記係合ピンが移動する軌跡に沿って前記傾動部材の両側面板に長孔を形成し、該長孔内に係合ピンの両端部をスライド可能に係合してなる請求項１記載の椅子の肘掛け装置。A long hole is formed in the both side plates of the tilting member along a trajectory along which the engaging pin moves as the rotating member rotates, and both end portions of the engaging pin are slidably engaged in the long hole. The armrest device for a chair according to claim 1 formed together.

前記係合凹部を金属製のラック部材に形成し、該ラック部材をブロック体の前面上端部に嵌合し、筒状の前記支持部の上端部内にブロック体を嵌着することによって、該支持部の上端部にラック部材を固定してなる請求項１記載の椅子の肘掛け装置。The supporting recess is formed by forming the engaging recess in a metal rack member, fitting the rack member to an upper front end portion of the block body, and fitting the block body into the upper end portion of the cylindrical support portion. The armrest device for a chair according to claim 1, wherein a rack member is fixed to an upper end portion of the portion.