JP5563631B2 - Chair - Google Patents

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JP5563631B2
JP5563631B2 JP2012185430A JP2012185430A JP5563631B2 JP 5563631 B2 JP5563631 B2 JP 5563631B2 JP 2012185430 A JP2012185430 A JP 2012185430A JP 2012185430 A JP2012185430 A JP 2012185430A JP 5563631 B2 JP5563631 B2 JP 5563631B2
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armrest support
armrest
engagement
fitted
bottom wall
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洋一郎 小田
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Okamura Corp
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Description

本発明は、簡単かつ確実に組み付けることができるようにした肘掛けを有する椅子に関する。   The present invention relates to a chair having an armrest that can be assembled easily and reliably.

高級仕様の事務用椅子には、座板の高さ調整機構や、背板のリクライニング機構を備えるほか、肘掛けの高さを調節可能とした肘掛装置を設けたものがある。   Some high-grade office chairs are provided with a seat plate height adjustment mechanism and a back plate reclining mechanism, as well as an armrest device that can adjust the height of the armrest.

この種の肘掛装置の従来例として、例えば下記特許文献１に記載されているようなものがある。   As a conventional example of this type of armrest device, for example, there is one described in Patent Document 1 below.

このものは、座の側方より起立する筒状の肘掛け支柱の上端より、肘当てを支持する肘当て支持杆を、上下方向に摺動可能として嵌合し、肘当て支持杆の上部に前後方向に進退自在に設けた操作ノブの押動操作により、肘当て支持杆内に中間部を支点として回動可能に設けた操作杆の上部を後方に押動し、それによって、操作杆の下部に設けた係合ピンを前方に移動し、肘掛け支柱の内面に嵌合したガイドスリーブの両側面に設けた上下方向を向くガイド孔後縁に上下多段状に設けた係止溝のいずれかに係合していた上記係合ピンを、その係合溝から離脱させ、その状態で、肘当ておよび肘当て支持杆を所望の高さに移動させた後、操作ノブから手を離すと、肘当て支持杆内に設けた付勢手段の付勢力により、上記係合ピンが後方に移動させられ、いずれかの係合溝に係合するようになっている。   In this case, an elbow rest supporting rod that supports the elbow rest is fitted from the upper end of a cylindrical armrest strut that stands up from the side of the seat so that it can slide in the vertical direction. The upper part of the operation rod that can be turned around the middle part in the elbow pad support rod is pushed backward by the pushing operation of the operation knob that can be moved forward and backward in the direction. The engagement pin provided on the guide sleeve is moved forward, and the guide sleeve is fitted on the inner surface of the armrest strut. When the engaging pin is disengaged from the engaging groove, and the elbow rest and the elbow rest supporting rod are moved to a desired height in this state, when the hand is released from the operation knob, The engagement pin is moved backward by the biasing force of the biasing means provided in the contact support rod. Is adapted to engage in any of the engagement grooves.

また、上記ガイドスリーブは、ほぼ半円弧状断面の２個の半割片を向き合わせて接合した状態で、各半割片の上端に設けた外向き鍔部が、肘掛け支柱の上端に当接するまで、肘掛け支柱内に圧嵌されている。   Further, the guide sleeve has an outward flange provided at the upper end of each half piece in contact with the upper end of the armrest strut in a state where two half pieces having a substantially semicircular arc cross section are faced to each other and joined. Until it is press-fitted in the armrest strut.

特開２００５−１８５６２９号公報JP 2005-185629 A

しかし、特許文献１のものにおいては、２分割構造としたガイドスリーブは、両半割片を向き合わせて接合した状態で、各半割片の上端に設けた外向き鍔部が、肘掛け支柱の上端に当接するまで、肘掛け支柱内に圧嵌してあるだけであるので、肘当てを引き上げる際等に、肘掛け支柱から上方に抜け外れるおそれがある。
これを防止するため、ガイドスリーブを肘掛け支柱にねじ止めすることが考えられるが、それによると、ねじの頭部が外部に露呈し、体裁が悪くなるとともに、ねじ止め作業が煩雑になり、組付作業性が悪くなる。 However, in the one in Patent Document 1, the guide sleeve having a two-part structure is formed in such a manner that the outward flanges provided at the upper ends of the half pieces are in the state of the armrest struts in a state where both the half pieces are faced and joined. Since it is only press-fitted in the armrest strut until it comes into contact with the upper end, there is a risk that it will come off from the armrest strut when the elbow rest is pulled up.
In order to prevent this, it is conceivable to screw the guide sleeve to the armrest post, but according to this, the head of the screw is exposed to the outside, the appearance becomes worse, the screwing work becomes complicated, and the assembly is difficult. Workability becomes worse.

本発明は、従来の技術が有する上記のような問題点に鑑み、ねじ止め作業等を行うことなく、各部材を簡単かつ確実に組み付けることができ、しかも組付後に、外れることがないようにした肘掛けを有する椅子を提供することを目的としている。   In view of the above-mentioned problems of the prior art, the present invention can easily and reliably assemble each member without performing a screwing operation or the like, and so as not to come off after the assembly. It is an object to provide a chair having an armrest.

本発明によると、上記課題は次のようにして解決される。
（１）座の側方より起立し、上端が開口し、下端が底壁をもって閉塞され、かつ前記底壁に複数の係合孔が設けられた肘掛支持筒と、
前記肘掛支持筒の上端の開口より前記肘掛支持筒内に嵌合され、下端に、前記肘掛支持筒内に上方より挿入されたとき、前記底壁の複数の係合孔に嵌合され、かつ互いに異なる方向に係止されるようにした複数の弾性係止爪が設けられた中筒と、
前記中筒に上下方向に移動可能、かつ上限位置で停止可能として嵌合され、上部が前記肘掛支持筒の上端より上方に突出し、かつ上端に肘掛けが支持された肘掛支持杆と、
前記肘掛支持筒の底壁における各係合孔に、各弾性係止爪の背面に当接するようにして嵌合されることにより、各弾性係止爪の係合孔から外れる方向への弾性撓曲を阻止する複数の差し込み片が上面に突設され、かつ前記肘掛支持筒の底壁の下面を覆う下部カバー
とを備えるものとする。 According to the present invention, the above problem is solved as follows.
(1) An armrest support cylinder that stands up from the side of the seat, has an upper end that is open, a lower end that is closed with a bottom wall, and a plurality of engagement holes provided in the bottom wall;
Wherein the upper end opening of the armrest support tube is fitted in the armrest support cylinder, below end, when inserted from above into the armrest support cylinder, is fitted into a plurality of engagement holes of said bottom wall, And a middle cylinder provided with a plurality of elastic locking claws adapted to be locked in different directions ;
An armrest support rod that is vertically movable in the middle cylinder and is fitted so as to be stopped at the upper limit position, the upper part projects upward from the upper end of the armrest support cylinder, and the armrest is supported at the upper end.
By being fitted into each engagement hole in the bottom wall of the armrest support cylinder so as to abut on the back surface of each elastic locking claw, the elastic deformation in a direction away from the engagement hole of each elastic locking claw. A plurality of insertion pieces that prevent bending are provided on the upper surface, and a lower cover that covers the lower surface of the bottom wall of the armrest support cylinder is provided.

このような構成によると、中筒を、肘掛支持筒に上方より挿入するだけで、各弾性係止爪が肘掛支持筒の底壁における係合孔に嵌合係止され、肘掛支持体が肘掛支持筒より抜け止めされるので、ねじ止め作業等を行うことなく、各部材を簡単かつ確実に組み付けることができ、しかも組付後に、中筒が肘掛支持筒より外れることがない。 According to such a configuration, by simply inserting the middle cylinder into the armrest support cylinder from above, each elastic locking claw is fitted and locked to the engagement hole in the bottom wall of the armrest support cylinder, and the armrest support is Since it is prevented from coming off from the support cylinder, each member can be easily and reliably assembled without performing screwing work or the like, and the middle cylinder does not come off from the armrest support cylinder after the assembly.

また、肘掛支持筒の底壁における係合孔に、弾性係止爪の背面に当接して、弾性係止爪の係合孔から外れる方向への弾性撓曲を阻止する差し込み片を嵌合してあるので、弾性係止爪が、係合孔から外れるのを防止することができ、ひいては、中筒が肘掛支持筒から外れるのを防止することができる。 In addition, the engagement hole in the bottom wall of the armrest support cylinder is fitted with an insertion piece that abuts the back surface of the elastic locking claw and prevents elastic bending in a direction away from the engagement hole of the elastic locking claw. Therefore, it is possible to prevent the elastic latching claw from coming off from the engagement hole, and consequently to prevent the middle cylinder from coming off from the armrest support cylinder.

さらに、差し込み片を、肘掛支持筒の底壁の下面を覆う下部カバーの上面に突設してあるので、差し込み片を係合孔に嵌合し易くなり、また、肘掛支持筒の底壁、特に係合孔の部分が下部カバーにより覆われるので、体裁がよくなる。 Furthermore, since the insertion piece protrudes from the upper surface of the lower cover that covers the lower surface of the bottom wall of the armrest support cylinder, it becomes easy to fit the insertion piece into the engagement hole, and the bottom wall of the armrest support cylinder, In particular, the engagement hole is covered with the lower cover, so that the appearance is improved.

（２）上記(１)項において、中筒を、ほぼ半円弧状断面の２個の半割片を向き合わせて接合することにより形成するとともに、各半割片の下端両側部より垂下する弾性係止爪の側面同士を互いに突き合わせて、同一の係合孔に嵌合係止させる。 (2) above (1) at the section, the middle cylinder, and forming by joining opposed nearly two half pieces of semicircular cross section, suspended from the lower end sides of each half piece The side surfaces of the elastic locking claws to be engaged with each other are fitted and locked in the same engagement hole.

このような構成によると、肘掛支持杆に係合ピンを装着した状態で、２個の半割片を、肘掛支持杆に、左右から挟むようにして、簡単に装着することができ、組み付け作業性をよくすることができるとともに、両半割片を向き合わせて接合したとき、左右に対向する弾性係止爪の側面同士が互いに接合し、この接合した２個の弾性係止爪を、肘掛支持筒の底壁に設けた係合孔に嵌合係止することにより、中筒は、両半割片が位置ずれすることなく、肘掛支持筒より抜け止めされる。また、肘掛支持筒の底壁に設ける係合孔の数を少なくすることができる。   According to such a configuration, with the engagement pin attached to the armrest support rod, it is possible to easily attach the two halves to the armrest support rod from the left and right, and to improve the assembly workability. When both halves are joined facing each other, the side surfaces of the elastic locking claws facing left and right are bonded to each other, and these two elastic locking claws are joined to the armrest support cylinder. By fitting and locking in the engagement hole provided in the bottom wall of the inner wall, the middle cylinder is prevented from coming off from the armrest support cylinder without the positional displacement of both halves. Further, the number of engagement holes provided in the bottom wall of the armrest support cylinder can be reduced.

本発明によると、ねじ止め作業等を行うことなく、各部材を簡単かつ確実に組み付けることができ、しかも組付後に、中筒が外れることがないようにした、椅子における肘掛けの高さ調節装置を提供することを提供することができる。   According to the present invention, an armrest height adjusting device for a chair that can easily and surely assemble each member without performing a screwing operation and the like so that the middle cylinder does not come off after the assembly. Can be provided.

本発明の椅子の一実施形態の斜視図である。It is a perspective view of one embodiment of a chair of the present invention. 同じく、側面図である。Similarly, it is a side view. 肘掛装置の分解斜視図である。It is a disassembled perspective view of an armrest apparatus. 肘掛装置における高さ調節装置の部分の拡大分解斜視図である。It is an expansion disassembled perspective view of the part of the height adjustment apparatus in an armrest apparatus. 図４図示の状態から、一部の部材を組み付けた状態を示す分解斜視図である。It is a disassembled perspective view which shows the state which attached some members from the state of FIG. 4 illustration. 同じく、組立完成状態を示す斜視図である。Similarly, it is a perspective view which shows an assembly completion state. 完成した肘掛装置を斜め下方より見た斜視図である。It is the perspective view which looked at the completed armrest apparatus from diagonally downward. 同じく、縦断側面図である。Similarly, it is a vertical side view. 本発明の肘掛装置の第２の実施形態の下部の縦断側面図である。It is a vertical side view of the lower part of 2nd Embodiment of the armrest apparatus of this invention. 同じく、下部の縦断正面図である。組立完成状態を示す斜視図である。Similarly, it is a lower longitudinal front view. It is a perspective view which shows an assembly completion state. 同じく、下方より見た分解斜視図である。Similarly, it is the exploded perspective view seen from the lower part. 下部カバーを斜め上方より見た斜視図である。It is the perspective view which looked at the lower cover from diagonally upward.

以下、本発明の実施形態を、図面に基づいて説明する。
図１は、本発明の椅子の第１の実施形態の斜視図、図２は、同じく側面図である。
この椅子は、先端部にキャスタ１が設けられた放射状の５本の脚杆２の中心部に支持された脚柱３と、この脚柱３の上端に設けられた支基４と、この支基４の上方に、支持リンク５を介して支持された座６と、支基４に左右方向を向く軸７をもって枢着され、後傾可能とした背凭れ８と、座６の両側方(片方のみとすることもある)より起立する肘掛装置９とを備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a first embodiment of the chair of the present invention, and FIG. 2 is a side view of the same.
The chair includes a pillar 3 supported at the center of five radial rods 2 each having a caster 1 at the tip, a support base 4 provided at the upper end of the pillar 3, and the support. A seat 6 supported above the base 4 via a support link 5, a backrest 8 that is pivotally attached to the support base 4 with a shaft 7 facing in the left-right direction, and can be tilted backward, and both sides of the seat 6 ( And an armrest device 9 that stands up more than the other.

図３〜図８は、肘掛装置９の詳細を示す。
肘掛装置９は、下端部内面に設けたブラケット１０を、座６の側部下面に固着することにより、座６の側方より若干前傾姿勢で起立するようにした肘掛支持筒１１と、この肘掛支持筒１１内面に内接するように嵌合された中筒１２と、肘掛け１３を支持するとともに、中筒１２内に上下方向に摺動可能として嵌合された筒状の肘掛支持杆１４と、肘掛支持筒１１に対する肘掛支持杆１４の高さを調節する高さ調節装置１５とを備えている。
また、肘掛支持筒内に嵌合された中筒１２と、中筒１２に上下方向に移動可能として嵌合され、上部が肘掛支持筒の上端より上方に突出し、かつ上端に肘掛け１３が支持された肘掛支持杆１４と、中筒１２に対する肘掛支持杆１４の高さを調節する高さ調節装置１５とによって、肘掛け支持体が形成されている。 3 to 8 show details of the armrest device 9.
The armrest device 9 includes an armrest support cylinder 11 that is configured to stand in a slightly forward tilted posture from the side of the seat 6 by fixing a bracket 10 provided on the inner surface of the lower end portion to the lower surface of the side portion of the seat 6, A middle cylinder 12 fitted so as to be inscribed in the inner surface of the armrest support cylinder 11; a cylindrical armrest support rod 14 which supports the armrest 13 and is fitted in the middle cylinder 12 so as to be slidable in the vertical direction; And a height adjusting device 15 for adjusting the height of the armrest support rod 14 with respect to the armrest support tube 11.
Further, the middle cylinder 12 fitted in the armrest support cylinder, the middle cylinder 12 is fitted so as to be movable in the vertical direction, the upper part projects upward from the upper end of the armrest support cylinder, and the armrest 13 is supported by the upper end. The armrest support body is formed by the armrest support bar 14 and the height adjusting device 15 that adjusts the height of the armrest support bar 14 relative to the middle cylinder 12.

肘掛支持筒１１と中筒１２と肘掛支持杆１４とは、前後方向を向く長軸を、左右方向を向く短軸よりわずかに長くした楕円形断面の筒状としてあるが、断面円弧状その他の形状としてもよい。   The armrest support cylinder 11, the middle cylinder 12, and the armrest support rod 14 have a cylindrical shape with an elliptical cross section in which the long axis facing the front-rear direction is slightly longer than the short axis facing the left-right direction. It is good also as a shape.

中筒１２は、左右に２分割した２個の半割片１２Ａ、１２Ｂを向き合わせて接合することにより形成されている。両半割片１２Ａ、１２Ｂの対向面の４隅部には、正規の位置関係したとき、互いに嵌合するようにした位置決め用の凹部１６と凸部１７とが設けられている。   The middle cylinder 12 is formed by facing and joining two halved pieces 12A and 12B divided into left and right parts. At the four corners of the opposing surfaces of both halved pieces 12A and 12B, positioning concave portions 16 and convex portions 17 are provided so as to be fitted to each other when they are in a proper positional relationship.

両半割片１２Ａ、１２Ｂの対向部の下端前後部には、下端部に前後外向きの爪１８ａを有する弾性係止爪１８が垂下するように設けられており、両半割片１２Ａ、１２Ｂを向き合わせて接合したとき、左右に対向する弾性係止爪１８、１８の側面同士が互いに接合し、この接合した２個の弾性係止爪１８、１８を、肘掛支持筒１１の下端を閉塞する底壁１１ａに設けた係合孔１９(図７および図８参照)に嵌合係止することにより、中筒１２は、両半割片１２Ａ、１２Ｂが位置ずれすることなく、肘掛支持筒１１より抜け止めされている。   An elastic locking claw 18 having a front-rear outward claw 18a at the lower end portion is provided at the lower end front and rear portions of the opposed portions of the half halves 12A, 12B. When the two sides of the elastic locking claws 18, 18 facing each other are bonded to each other, the two elastic locking claws 18, 18 that are joined to each other are closed on the lower end of the armrest support cylinder 11. By engaging and locking in an engagement hole 19 (see FIGS. 7 and 8) provided in the bottom wall 11a, the middle cylinder 12 can be supported by the armrest support cylinder without positional displacement of the half halves 12A and 12B. 11 is prevented from coming off.

高さ調節装置１５は、肘掛支持杆１４の上部前面に設けられた切欠き２０を通って前下方に突出する操作部２１ａを有するとともに、後端部に、下向きＵ字状の係合凹部２１ｂを有し、かつ中間部が左右方向を向く軸２１ｃをもって、肘掛支持杆１４の上部に枢着された操作レバー２１と、側面形が上下方向に長いほぼ菱形をなし、中間部を中心に回動可能として、肘掛支持杆１４内に嵌合され、上端部に、操作レバー２１の係合凹部２１ｂに受け入れられて係合する、左右方向を向く軸部２２ａが設けられ、かつ下端部に、肘掛支持杆１４のやや下部の両側壁に設けられた前後方向を向く長孔２３を通って、肘掛支持杆１４を左右方向に貫通する係合ピン２４の中間部が貫通する左右方向を向くピン挿入孔２２ｂが設けられた回動レバー２２と、中筒１２の各半割片１２Ａ、１２Ｂにそれぞれ設けられ、かつ肘掛支持杆１４の両側方に突出する係合ピン２４の各端部が嵌合するようにした係合孔２５とを備えている。   The height adjusting device 15 has an operation portion 21a that projects forward and downward through a notch 20 provided on the upper front surface of the armrest support rod 14, and a downward U-shaped engagement recess 21b at the rear end portion. And an operation lever 21 pivotally attached to the upper portion of the armrest support rod 14 with a shaft 21c whose middle portion faces in the left-right direction, and a substantially rhombus whose side shape is long in the vertical direction. A shaft portion 22a facing in the left-right direction, which is fitted in the armrest support rod 14 and is received in and engaged with the engagement recess 21b of the operation lever 21, is provided at the upper end portion. A pin that faces in the left-right direction through an intermediate portion of an engagement pin 24 that penetrates the armrest support rod 14 in the left-right direction through a long hole 23 facing in the front-rear direction provided on both side walls slightly below the armrest support rod 14 Rotating lever 2 provided with an insertion hole 22b And an engagement hole 25 provided in each of the half pieces 12A and 12B of the middle cylinder 12 and adapted to fit each end portion of an engagement pin 24 protruding to both sides of the armrest support rod 14. I have.

操作レバー２１は、その中間部両側面に突設した軸２１ｃを、肘掛支持杆１４の上端の開口縁に設けた上方に開口する左右１対の凹部２６に上方より嵌合し、かつ操作レバー２１の中間部の上面に、肘掛支持杆１４の上端開口部を閉塞する閉塞部材２７の下面を当接させることにより、軸２１ｃを、凹部２６より抜け止めして、肘掛支持杆１４の上部に簡単に装着しうるようにしてある。   The operating lever 21 is fitted with a pair of left and right concave portions 26 provided on the opening edge of the upper end of the armrest support rod 14 from above, with shafts 21c projecting on both side surfaces of the intermediate portion from above. 21 is brought into contact with the lower surface of the closing member 27 that closes the upper end opening of the armrest support rod 14, so that the shaft 21 c is prevented from coming off from the recess 26, and is placed on the upper portion of the armrest support rod 14. It can be easily installed.

回動レバー２２の上下方向の中間部には、肘掛支持杆１４の前後の内面に内接するとともに、菱形の前後の頂部に相当する部分において、曲率中心が同一の円弧状をなして前後に突出する膨出部２２ｃが設けられ、回動レバー２２は、特別に枢軸を設けることなく、この膨出部２２ｃの曲率中心を中心として、肘掛支持杆１４内において回動しうるようになっている。   In the middle of the pivot lever 22 in the vertical direction, it is inscribed in the front and rear inner surfaces of the armrest support rod 14 and protrudes forward and backward in the portion corresponding to the top of the rhombus in the same arc shape. The bulging portion 22c is provided, and the turning lever 22 can be turned in the armrest support rod 14 around the center of curvature of the bulging portion 22c without any special pivot. .

各半割片１２Ａ、１２Ｂに設けられた係合孔２５は、中筒１２の軸線方向を向く長孔状の連絡孔２５ａと、その前縁に、前方を向く凹溝状をなして上下多段状に設けられた複数の係合部２５ｂとからなり、肘掛支持杆１４より両側方に突出する係合ピン２４の各端部が、前記連絡孔２５ａに嵌合しているときは、係合ピン２４およびは肘掛支持杆１４は、中筒１２および肘掛支持筒１１に対して、上下方向に自由に移動することができ、係合ピン２４が、いずれかの係合部２５ｂに係合しているときは、係合ピン２４および肘掛支持杆１４の上下方向の移動は阻止されるようになっている。   Engagement holes 25 provided in each of the half pieces 12A and 12B have a long hole-shaped connecting hole 25a facing the axial direction of the middle cylinder 12, and a forward groove on the front edge thereof. When the end portions of the engagement pin 24 which are formed in a plurality of shapes and protrude from the armrest support rod 14 on both sides are fitted in the communication holes 25a, the engagement holes 25a are engaged. The pin 24 and the armrest support rod 14 can freely move in the vertical direction with respect to the middle cylinder 12 and the armrest support cylinder 11, and the engagement pin 24 engages with any of the engagement portions 25b. In this case, the vertical movement of the engagement pin 24 and the armrest support rod 14 is prevented.

回動レバー２２の下端部には、後上方を向く弾性舌片２８が一体的に形成されており、この弾性舌片２８の先端部が、肘掛支持杆１４の後部内面に圧接することにより、回動レバー２２は、図８に実線で示すように、係合ピン２４が係合孔２５におけるいずれかの係合部２５ｂに係合する係止位置に向けて常時付勢されている。
すなわち、この弾性舌片２８は、回動レバー２２を、係合ピン２４がいずれかの係合部２５ｂに係合する方向に向けて付勢する付勢手段をなしている。 An elastic tongue piece 28 is formed integrally with the lower end portion of the rotating lever 22 so as to face the rear upper side, and the distal end portion of the elastic tongue piece 28 comes into pressure contact with the inner surface of the rear portion of the armrest support rod 14. As shown by a solid line in FIG. 8, the rotation lever 22 is always urged toward a locking position where the engagement pin 24 engages with any engagement portion 25 b in the engagement hole 25.
That is, the elastic tongue piece 28 constitutes an urging means for urging the rotation lever 22 in a direction in which the engagement pin 24 engages with any one of the engagement portions 25b.

したがって、図８に実線で示すように、常時は、この付勢手段の作用により、係合ピン２４はいずれかの係合部２５ｂに係合し、肘掛け１３は、その係合部２５ｂに対応する高さに保持され、操作レバー２１は、その操作部２１ａが切欠き２０より前下方に突出する非操作位置に位置している。   Therefore, as indicated by the solid line in FIG. 8, the engagement pin 24 is normally engaged with one of the engagement portions 25b by the action of the biasing means, and the armrest 13 corresponds to the engagement portion 25b. The operation lever 21 is positioned at a non-operation position where the operation portion 21a protrudes forward and downward from the notch 20.

この状態から、肘掛け１３の高さを変更したい場合は、まず、操作レバー２１の操作部２１ａを、この弾性舌片２８の付勢力に抗して、非操作位置から、図８に想像線で示すように、上方の操作位置に向かって上向きに回動させる。
すると、操作レバー２１の後部の係合凹部２１ｂが、前方に回動し、それに伴って、係合凹部２１ｂと上端の軸部２２ａが係合している回動レバー２２は、図８に想像線で示すように、反時計回りに回動させられ、係合ピン２４は、係合孔２５の係合部２５ｂから離脱して、連絡孔２５ａ内に嵌合する係止解除位置へ移動させられる。 When it is desired to change the height of the armrest 13 from this state, first, the operating portion 21a of the operating lever 21 is resisted against the urging force of the elastic tongue piece 28 from the non-operating position by an imaginary line in FIG. As shown, it is turned upward toward the upper operating position.
Then, the engaging recess 21b at the rear portion of the operation lever 21 rotates forward, and accordingly, the rotating lever 22 in which the engaging recess 21b and the shaft portion 22a at the upper end are engaged is imagined in FIG. As indicated by the line, the pin is rotated counterclockwise, and the engagement pin 24 is disengaged from the engagement portion 25b of the engagement hole 25 and moved to a lock release position that fits in the communication hole 25a. It is done.

ついで、操作レバー２１の操作部２１ａを操作位置に保持したままの状態で、肘掛け１３および肘掛支持杆１４を、所望の高さまで上昇または下降させる。
このとき、係合ピン２４は、連絡孔２５ａ内に位置しているので、その連絡孔２５ａ内を自由に上下動することができる。 Next, the armrest 13 and the armrest support rod 14 are raised or lowered to a desired height while the operation portion 21a of the operation lever 21 is held at the operation position.
At this time, since the engagement pin 24 is located in the communication hole 25a, the engagement pin 24 can freely move up and down in the communication hole 25a.

所望の高さに到達した後、操作レバー２１の操作部２１ａから手を離すか、または操作力を緩めると、弾性舌片２８の付勢力により、回動レバー２２は、元の係止位置に向かって付勢させられ、係合ピン２４は、そのときの最も近い係合部２５ｂに係合させられる。なお、係合ピン２４が、いずれかの係合部２５ｂに適正に係合しないときは、肘掛け１３を若干上下いずれかに移動させればよい。   After reaching the desired height, when the hand is released from the operating portion 21a of the operating lever 21 or the operating force is loosened, the rotating lever 22 is returned to the original locking position by the biasing force of the elastic tongue piece 28. The engagement pin 24 is engaged with the closest engagement portion 25b at that time. In addition, what is necessary is just to move the armrest 13 to the some up and down direction, when the engaging pin 24 does not engage one of the engaging parts 25b appropriately.

係合ピン２４がいずれかの係合部２５ｂに適正に係合し、回動レバー２２が係止位置に復帰させられると、それに伴って、操作レバー２１も非操作位置に復帰させられる。   When the engaging pin 24 is properly engaged with one of the engaging portions 25b and the rotating lever 22 is returned to the locking position, the operating lever 21 is also returned to the non-operating position.

また、この肘掛装置９の組立てに際しては、肘掛支持杆１４に操作レバー２１を装着した後、操作レバー２１を位置決めしておき、かつ回動レバー２２を、肘掛支持杆１４の下端から上方に向けて差し込むだけで、操作レバー２１の後端部と回動レバー２２の上端部とが、係合凹部２１ｂを介して互いに係合するとともに、肘掛支持杆１４の長孔２３と回動レバー２２のピン挿入孔２２ｂとを整合させた状態で、簡単に組み立てることができる。このとき、操作レバー２１は、重心が軸２１ｃより操作部２１ａ寄りに位置するように、操作部２１ａを重く形成しておくことにより、自重で非操作位置に位置決めされ、また、回動レバー２２は、弾性舌片２８を、肘掛支持杆１４の後部内面に圧接させることにより、係止位置に位置決めされるので、操作レバー２１および回動レバー２２のための特別な位置決め手段を設ける必要はない。   Further, when assembling the armrest device 9, the operation lever 21 is mounted on the armrest support rod 14, the operation lever 21 is positioned, and the rotation lever 22 is directed upward from the lower end of the armrest support rod 14. The rear end portion of the operation lever 21 and the upper end portion of the rotation lever 22 are engaged with each other via the engagement recess 21b, and the elongated hole 23 of the armrest support rod 14 and the rotation lever 22 are It can be easily assembled with the pin insertion hole 22b aligned. At this time, the operation lever 21 is positioned at the non-operation position by its own weight by forming the operation portion 21a so that the center of gravity is located closer to the operation portion 21a than the shaft 21c. Since the elastic tongue piece 28 is positioned at the locking position by pressing the elastic tongue piece 28 against the inner surface of the rear portion of the armrest support rod 14, it is not necessary to provide special positioning means for the operation lever 21 and the rotation lever 22. .

この状態で、互いに整合した肘掛支持杆１４の長孔２３と回動レバー２２のピン挿入孔２２ｂとに、係合ピン２４を貫通させた後、その左右両側方より、両半割片１２Ａ、１２Ｂを、互いに向き合わせて、かつ係合ピン２４の両端が予め定めた係合部２５ｂに係合するようにして、肘掛支持杆１４を挟んで接合させ、それらを一体として、肘掛支持筒１１内に上方より挿入し、互いに接合された左右に対応する弾性係止爪１８、１８を、肘掛支持筒１１の底壁１１ａにおける係合孔１９に嵌合係止させることにより、ねじ等を全く使用することなく、肘掛支持筒１１、中筒１２、肘掛支持杆１４、操作レバー２１、回動レバー２２等を、簡単かつ確実に組み立てることができる。   In this state, after the engaging pin 24 is passed through the elongated hole 23 of the armrest support rod 14 and the pin insertion hole 22b of the rotating lever 22 that are aligned with each other, both the half pieces 12A, 12B are faced to each other and both ends of the engagement pin 24 are engaged with a predetermined engagement portion 25b so as to be joined with the armrest support rod 14 interposed therebetween, and these are joined together to form an armrest support cylinder 11. By inserting the elastic locking claws 18 and 18 corresponding to the left and right jointed with each other into the engagement hole 19 in the bottom wall 11a of the armrest support cylinder 11, the screw or the like is completely removed. Without use, the armrest support cylinder 11, the middle cylinder 12, the armrest support rod 14, the operation lever 21, the rotation lever 22 and the like can be easily and reliably assembled.

肘掛け１３は、本発明には直接関係しないので、その詳細な説明は省略するが、この例では、図３に示すように、肘掛基板２９と、チルト部材３０と、固定円板３１と、芯材３２と、クッション材３３と、肘掛パッド３４とを、順次積み重ねて、合体させることにより、左右方向に旋回可能で、しかも、左右方向に平行移動もできるような構成としてある。   Since the armrest 13 is not directly related to the present invention, a detailed description thereof will be omitted, but in this example, as shown in FIG. 3, the armrest substrate 29, the tilt member 30, the fixed disk 31, the core The material 32, the cushion material 33, and the armrest pad 34 are sequentially stacked and united so that the material 32, the cushion material 33, and the armrest pad 34 can be turned in the left-right direction and can be translated in the left-right direction.

図９〜図１２は、本発明の第２の実施形態を示す。なお、第１の実施形態におけるのと同一または類似の部材には、同一の符号をもって図示するに止め、それらについての詳細な説明は省略する。
この実施形態においては、肘掛支持筒１１の底壁１１ａにおける前後の係合孔１９に、弾性係止爪１８の背面に当接して、弾性係止爪１８の係合孔１９から外れる方向への弾性撓曲を阻止する差し込み片３５を嵌合してあるので、弾性係止爪１８が、係合孔１９から外れるのを防止することができ、ひいては、中筒１２が肘掛支持筒１１から外れるのを防止できるようにしてある。 9 to 12 show a second embodiment of the present invention. Note that the same or similar members as those in the first embodiment are illustrated with the same reference numerals, and detailed descriptions thereof are omitted.
In this embodiment, the front and rear engagement holes 19 in the bottom wall 11a of the armrest support cylinder 11 are brought into contact with the back surface of the elastic locking claws 18 so as to be detached from the engagement holes 19 of the elastic locking claws 18. Since the insertion piece 35 for preventing the elastic bending is fitted, the elastic locking claw 18 can be prevented from being detached from the engagement hole 19, and the middle cylinder 12 is detached from the armrest support cylinder 11. It can be prevented.

また、前後の差し込み片３５を、肘掛支持筒１１の底壁１１ａの下面を覆う下部カバー３６の上面に突設してあるので、差し込み片３５を係合孔１９に嵌合し易くなり、また、肘掛支持筒１１の底壁１１ａ、特に係合孔１９の部分が下部カバー３６により覆われるので、体裁がよくなる。   Further, since the front and rear insertion pieces 35 project from the upper surface of the lower cover 36 that covers the lower surface of the bottom wall 11a of the armrest support cylinder 11, the insertion pieces 35 can be easily fitted into the engagement holes 19, and Since the bottom wall 11a of the armrest support cylinder 11, particularly the engagement hole 19, is covered with the lower cover 36, the appearance is improved.

さらに、この例では、肘掛支持筒１１の底壁１１ａの中央に、円形孔(係合孔)３７を設け、中筒１２における左右の半割片１２Ａ、１２Ｂの下端部に、この円形孔３７の左右の縁に弾性係合するようにした１対の平面視円弧状の弾性係合爪３８、３８を設け、さらに、下部カバー３６の上面中央に、円形孔３７に弾性係合した左右の弾性係合爪３８、３８間に下方より嵌合することにより、両弾性係合爪３８、３８のないほうへの弾性撓曲を阻止する差し込み片３９と、円形孔３７の前後の縁に弾性係合する弾性係合片４０、４０を設けてある。
このような構成を付加することにより、中筒１２が肘掛支持筒１１から外れるのを、より強力に防止することができる。 Furthermore, in this example, a circular hole (engagement hole) 37 is provided in the center of the bottom wall 11a of the armrest support cylinder 11, and this circular hole 37 is formed at the lower end of the left and right half pieces 12A, 12B in the middle cylinder 12. A pair of arcuate elastic engagement claws 38, 38 that are elastically engaged with the left and right edges of the lower cover 36 are provided, and the left and right elastically engaged with the circular hole 37 are provided at the center of the upper surface of the lower cover 36. By fitting between the elastic engagement claws 38, 38 from below, an insertion piece 39 that prevents elastic bending toward the side without both elastic engagement claws 38, 38 and the front and rear edges of the circular hole 37 are elastic. The elastic engagement pieces 40 and 40 to be engaged are provided.
By adding such a configuration, it is possible to more strongly prevent the middle cylinder 12 from being detached from the armrest support cylinder 11.

なお、第１の実施形態においては、操作レバー２１の後端部に、下向きＵ字状の係合凹部２１ｂを設け、これに、回動レバー２２の軸部２２ａが受け入れられて係合するようにしてあるが、操作レバー２１の後端部に、左右方向を向く軸部を設け、回動レバー２２の上端部に、回動レバー２２を肘掛支持杆１４の下端より上方に向けて押し入れたとき、上記軸部を受け入れて係合するようにした上向きＵ字状の係合凹部を設けてもよい。   In the first embodiment, a downward U-shaped engagement recess 21b is provided at the rear end portion of the operation lever 21, and the shaft portion 22a of the rotation lever 22 is received and engaged therewith. However, a shaft portion facing in the left-right direction is provided at the rear end portion of the operation lever 21, and the rotation lever 22 is pushed upward from the lower end of the armrest support rod 14 into the upper end portion of the rotation lever 22. In some cases, an upward U-shaped engagement recess adapted to receive and engage the shaft portion may be provided.

１ キャスタ
２ 脚杆
３ 脚柱
４ 支基
５ 支持リンク
６ 座
７ 軸
８ 背凭れ
９ 肘掛装置
１０ ブラケット
１１ 肘掛支持筒
１１ａ底壁
１２ 中筒
１２Ａ、１２Ｂ 半割片
１３ 肘掛け
１４ 肘掛支持杆
１５ 高さ調節装置
１６ 凹部
１７ 凸部
１８ 弾性係止爪
１８ａ爪
１９ 係合孔
２０ 切欠き
２１ 操作レバー
２１ａ操作部
２１ｂ係合凹部
２１ｃ軸
２２ 回動レバー
２２ａ軸部
２２ｂピン挿入孔
２２ｃ膨出部
２３ 長孔
２４ 係合ピン
２５ 係合孔
２５ａ連絡孔
２５ｂ係合部
２６ 凹部
２７ 閉塞部材
２８ 弾性舌片(付勢手段)
２９ 肘掛基板
３０ チルト部材
３１ 固定円板
３２ 芯材
３３ クッション材
３４ 肘掛パッド
３５ 差し込み片
３６ 下部カバー
３７ 円形孔
３８ 弾性係合爪
３９ 差し込み片
４０ 弾性係合片 DESCRIPTION OF SYMBOLS 1 Caster 2 Leg rod 3 Leg column 4 Support base 5 Support link 6 Seat 7 Axis 8 Backrest 9 Armrest device 10 Bracket 11 Armrest support cylinder 11a Bottom wall 12 Middle cylinder 12A, 12B Half piece 13 Armrest 14 Armrest support collar 15 Height Adjusting device 16 Concave part 17 Convex part 18 Elastic locking claw 18a Claw 19 Engagement hole 20 Notch 21 Operation lever 21a Operation part 21b Engagement concave part 21c Shaft 22 Rotating lever 22a Shaft part 22b Pin insertion hole 22c Swelling part 23 Long hole 24 Engagement pin 25 Engagement hole 25a Communication hole 25b Engagement part 26 Recessed part 27 Closure member 28 Elastic tongue piece (biasing means)
29 Elbow board 30 Tilt member 31 Fixed disc 32 Core material 33 Cushion material 34 Armrest pad 35 Insert piece 36 Lower cover 37 Circular hole 38 Elastic engagement claw 39 Insert piece 40 Elastic engagement piece

Claims (2)

座の側方より起立し、上端が開口し、下端が底壁をもって閉塞され、かつ前記底壁に複数の係合孔が設けられた肘掛支持筒と、
前記肘掛支持筒の上端の開口より前記肘掛支持筒内に嵌合され、下端に、前記肘掛支持筒内に上方より挿入されたとき、前記底壁の複数の係合孔に嵌合され、かつ互いに異なる方向に係止されるようにした複数の弾性係止爪が設けられた中筒と、
前記中筒に上下方向に移動可能、かつ上限位置で停止可能として嵌合され、上部が前記肘掛支持筒の上端より上方に突出し、かつ上端に肘掛けが支持された肘掛支持杆と、
前記肘掛支持筒の底壁における各係合孔に、各弾性係止爪の背面に当接するようにして嵌合されることにより、各弾性係止爪の係合孔から外れる方向への弾性撓曲を阻止する複数の差し込み片が上面に突設され、かつ前記肘掛支持筒の底壁の下面を覆う下部カバー
とを備えることを特徴とする椅子。 An armrest support cylinder that stands up from the side of the seat, has an upper end that is open, a lower end that is closed with a bottom wall, and a plurality of engagement holes in the bottom wall;
Wherein the upper end opening of the armrest support tube is fitted in the armrest support cylinder, below end, when inserted from above into the armrest support cylinder, is fitted into a plurality of engagement holes of said bottom wall, And a middle cylinder provided with a plurality of elastic locking claws adapted to be locked in different directions ;
An armrest support rod that is vertically movable in the middle cylinder and is fitted so as to be stopped at the upper limit position, the upper part projects upward from the upper end of the armrest support cylinder, and the armrest is supported at the upper end.
By being fitted into each engagement hole in the bottom wall of the armrest support cylinder so as to abut on the back surface of each elastic locking claw, the elastic deformation in a direction away from the engagement hole of each elastic locking claw. A chair comprising: a plurality of insertion pieces that prevent bending; and a lower cover that covers the lower surface of the bottom wall of the armrest support cylinder . 中筒を、ほぼ半円弧状断面の２個の半割片を向き合わせて接合することにより形成するとともに、各半割片の下端両側部より垂下する弾性係止爪の側面同士を互いに突き合わせて、同一の係合孔に嵌合係止させた請求項１記載の椅子。 The middle cylinder is formed by facing and joining two halves with a substantially semicircular arc cross section, and the side surfaces of the elastic locking claws that hang down from both sides of the lower end of each halve are abutted against each other. , claim 1 chair according to was fitted engagement locked to the same engaging hole.
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JP5733651B1 (en) * 2014-05-15 2015-06-10 及樺實業股▲分▼有限公司 Armrest lifting mechanism
WO2017213236A1 (en) * 2016-06-10 2017-12-14 株式会社岡村製作所 Armrest and chair

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JP2003074528A (en) * 2001-08-30 2003-03-12 Fuji Kogyo Kk Connecting structure of leg body and connected member, and connecting tool
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