JP4185992B2 - Chair - Google Patents

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JP4185992B2
JP4185992B2 JP2003363793A JP2003363793A JP4185992B2 JP 4185992 B2 JP4185992 B2 JP 4185992B2 JP 2003363793 A JP2003363793 A JP 2003363793A JP 2003363793 A JP2003363793 A JP 2003363793A JP 4185992 B2 JP4185992 B2 JP 4185992B2
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movable
chair
main body
support part
movable support
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JP2005124831A (en
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伸行 上田
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Kokuyo Co Ltd
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Kokuyo Co Ltd
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Description

本発明は、良好な着座感が得られる椅子に関するものである。   The present invention relates to a chair that can provide a good seating feeling.

着座者に対する良好な着座感、特に着座者の体へのフィット感を考慮した椅子が従来より種々考えられている。一例として、自動車のシートにおいては、当該シートの背凭れ本体であるフレームの両側端部にサイドフレームを回動自在に取り付けることにより、このサイドフレームに支持させたサイドサポートを変形によって着座者の胴体を左右から挟み付けるようにしたものが挙げられる(例えば、特許文献1参照)。このものは、操作レバーを回転操作することで左右のサイドフレームが同時に回動し、左右のサイドサポートが同程度に着座者の体側にフィットした位置でサイドフレームを固定するように構成されている。
実開昭60−155358号公報(第3図等)
Various chairs have been conventionally considered in consideration of a good seating feeling for a seated person, in particular, a fit to the body of the seated person. As an example, in an automobile seat, a side frame is pivotally attached to both side ends of a frame which is a backrest body of the seat, so that the side support supported by the side frame is deformed to deform the body of the seated person. The thing clamped from right and left is mentioned (for example, refer patent document 1). This is configured such that the left and right side frames are simultaneously rotated by rotating the operation lever, and the left and right side supports are fixed to the same position on the body side of the seated person.
Japanese Utility Model Publication No. 60-155358 (Fig. 3 etc.)

このように、複数のサイドサポートを同時に調整するようなものが各種考えられているが、各サイドサポートを支持するサイドフレームを同期させるための機構が必要なうえ、左右のサイドサポートを異なる変形位置で固定することは構成上困難である。仮に、左右のサイドサポートを個別に固定するように構成するには、上述のような操作レバーをサイドフレームごとに装備する必要がある。特に着座姿勢が多様であり、着席・離席の頻度が高い事務用椅子等では、フィット感の微妙な調整を簡易に行うことができるようにした椅子が望まれている。   In this way, various types of devices that simultaneously adjust a plurality of side supports have been considered, but a mechanism for synchronizing the side frames that support each side support is required, and the left and right side supports are fixed at different deformation positions. It is difficult to construct. If the left and right side supports are configured to be individually fixed, it is necessary to equip each side frame with an operation lever as described above. Particularly for office chairs and the like that have various seating postures and are frequently seated and unseated, a chair that can easily perform fine adjustment of the fit is desired.

そこで本発明は、以上のような問題に鑑みて、着座時のフィット感の調整を簡便に行うことができる椅子を提供しようとするものである。   In view of the above-described problems, the present invention is intended to provide a chair that can easily adjust the fit when seated.

すなわち、本発明の椅子は、椅子の全体的な形状を規定して着座者の体を支持する椅子本体と、椅子本体に沿って配置され着座者の体型、姿勢、好み等の使用状況に応じて部分的に変形可能な可動サポート部と、椅子本体に取り付けられ可動サポート部を動作又は停止させる可動・ロック機構とを具備する椅子において、可動・ロック機構を、椅子本体に取り付けられる取付部と、可動サポート部を支持する可動部と、取付部と可動部との間に介設されて可動部を取付部に対して回動動作可能とする回動軸と、この回動軸に当接して摩擦力を発生させ可動部及び可動サポート部を適宜位置で停止させる摩擦部材と、この摩擦部材と回動軸との間の摩擦力の大きさを調節する調節部とを具備してなるものとしている。 That is, the chair of the present invention defines the overall shape of the chair and supports the occupant's body, and the chair is arranged along the chair body according to the use situation of the occupant's body shape, posture, preference, etc. A movable support portion that is partially deformable and a movable / lock mechanism that is attached to the chair body and operates or stops the movable support portion, and the movable / lock mechanism is attached to the chair body; A movable portion that supports the movable support portion, a rotation shaft that is interposed between the attachment portion and the movable portion and that allows the movable portion to rotate with respect to the attachment portion, and abuts on the rotation shaft A friction member that generates a frictional force and stops the movable part and the movable support part at an appropriate position, and an adjustment part that adjusts the magnitude of the frictional force between the frictional member and the rotating shaft. It is said.

このような構成であれば、可動サポート部を変形させて着座者の体型、姿勢、好み等の使用状況に対応させて着座者の体にフィットさせた位置で調節部を調節すると、摩擦部材が摩擦力によって回動軸が回動しにくい状態となるので、可動部材をその状態に維持することができる。すなわち、調節部への調節を通じて可動サポート部を適宜の変形位置で固定することができるため、簡便に着座時におけるフィット感を得られるようにすることができる。   With such a configuration, when the adjustment unit is adjusted at a position where the movable support unit is deformed to fit the seated person's body in accordance with the use situation such as the body shape, posture, and preference of the seated person, the friction member is Since the rotation shaft is difficult to rotate due to the frictional force, the movable member can be maintained in that state. That is, since the movable support portion can be fixed at an appropriate deformation position through adjustment to the adjustment portion, it is possible to easily obtain a fit feeling when sitting.

このような椅子において、調節部の構成を簡易化して容易な調節方法を実現するには、調節部を、摩擦部材と回動軸との間の摩擦力の大きさを調節するための外力を入力する操作部と操作部の操作によって所定方向へ動作し摩擦部材を回動軸と接離する方向へ移動させる駆動部材とを具備するものとするとよい。具体的に、駆動部材が、操作部の操作によって回動軸の軸心と略同一方向に移動するものである場合、調節部に、駆動部材の動作に追従して摩擦部材を回動軸の軸心と略直交する方向に移動させる動作変換手段を形成することが好ましい。斯かる動作変換手段としては、駆動部材において摩擦部材と対向する面に形成され回動軸の軸心方向に対して傾斜するテーパ面と、このテーパ面に対応して摩擦部材に形成したテーパ面とから構成されるものを例示することができる。 In such a chair, in order to realize an easy adjustment method by simplifying the configuration of the adjustment unit, the adjustment unit is provided with an external force for adjusting the magnitude of the frictional force between the friction member and the rotating shaft. An input operation unit and a drive member that moves in a predetermined direction by the operation of the operation unit and moves the friction member in a direction in contact with and away from the rotation shaft may be provided. Specifically, when the drive member is moved in substantially the same direction as the axis of the rotation shaft by the operation of the operation unit, the friction member is moved to the adjustment unit following the operation of the drive member. It is preferable to form motion conversion means for moving in a direction substantially perpendicular to the axis. As such motion conversion means, there are a tapered surface formed on the surface of the drive member facing the friction member and inclined with respect to the axial direction of the rotation shaft, and a tapered surface formed on the friction member corresponding to the tapered surface. What is comprised from these can be illustrated.

なお、可動サポート部は1つ以上であれば数に限定はないが、着座者の体の両側部に対する好適なフィット感が得られるようにする場合には、特に可動サポート部を相対向する位置に2つ設けることが望ましい。   The number of movable support portions is not limited as long as it is one or more, but in order to obtain a suitable fit with respect to both sides of the seated person's body, the positions where the movable support portions are particularly opposed to each other. It is desirable to provide two.

このように可動サポート部を相対向する位置に2つ有する椅子の場合、これら2つの可動サポート部の固定を極めて簡易な単一の操作で行うことができるようにするためには、可動・ロック機構に、各可動サポート部に対応して各2つの可動部、回動軸及び摩擦部材を設け、調節部において、単一の操作部への操作によって単一の駆動部材を動作させることによって2つの摩擦部材を同時に移動させるように構成することが好適である。この場合、2つの可動サポート部を異なる形状に変化させて着座者による椅子の使用状況に即応した状態で容易に固定し得るようにするためには、各可動サポート部を個別に変形させた位置で、操作部への操作によって各可動部を同時に固定し得るように構成することが望ましい。   In the case of a chair having two movable support portions at opposite positions as described above, in order to be able to fix these two movable support portions by a very simple single operation, The mechanism is provided with two movable parts, a rotating shaft and a friction member corresponding to each movable support part, and the adjustment part is operated by operating a single drive member by operating a single operation part. It is preferable to configure the two friction members to move simultaneously. In this case, in order to change the two movable support portions into different shapes so that the movable support portions can be easily fixed in a state that promptly responds to the use situation of the chair by the seated person, each movable support portion is individually deformed. Thus, it is desirable that each movable part can be fixed simultaneously by operating the operation part.

また、椅子本体と可動サポート部との間に隙間が生じる場合、その隙間の存在によりフィット感が損なわれることがないようにするためには、可動サポート部の内部において、椅子本体と可動・ロック機構における可動部との間に介在して可動部の動作に追従する補助サポート部を設けることが望ましい。   In addition, when a gap is generated between the chair body and the movable support part, the chair body and the movable / locked part are placed inside the movable support part so that the fit feeling is not impaired by the existence of the gap. It is desirable to provide an auxiliary support part that intervenes between the movable part in the mechanism and follows the operation of the movable part.

着座者の体側をサポートする具体的な可動サポート部の態様としては、椅子本体の構成要素である背凭れ本体の側端部に設けられる背凭れサイドサポート部が挙げられ、この場合、可動・ロック機構を背凭れ本体に取り付けとよい。   Specific embodiments of the movable support portion that supports the body side of the seated person include a back support side support portion provided at a side end portion of the backrest body that is a component of the chair body. In this case, the movable / lock mechanism It is good to attach to the back body.

着座者の腰から大腿部を側方からサポートする可動サポート部の具体的態様としては、椅子本体の構成要素である座本体の側端部に設けられる座サイドサポート部が挙げられ、この場合、可動・ロック機構を座本体に取り付けるとよい。   As a specific aspect of the movable support part that supports the thigh from the side of the seated person's waist, a seat side support part provided at the side end of the seat body that is a component of the chair body, in this case, A movable / locking mechanism may be attached to the seat body.

さらに、着座者の側頭部をサポートする可動サポート部としては、椅子本体の構成要素であるヘッドレスト本体の側端部に設けられるヘッドレストサイドサポート部を挙げることができ、この場合、可動・ロック機構をヘッドレスト本体に取り付けるとよい。   Furthermore, as a movable support portion that supports the side of the seated person, a headrest side support portion provided at a side end portion of the headrest body, which is a component of the chair body, can be exemplified. It is good to attach to the headrest body.

可動サポート部が上述した背凭れサイドサポート部、座サイドサポート部、ヘッドレストサイドサポート部である場合には、可動サポート部を左右対にして設けることが好ましい。   When the movable support portion is the backrest side support portion, the seat side support portion, or the headrest side support portion described above, it is preferable to provide the movable support portions in a left-right pair.

また、可動サポート部が、椅子本体の構成要素である座本体の前端部に設けられる大腿サイドサポート部である場合には、可動・ロック機構を座本体に取り付けるとよく、そうすることで着座者の大腿部から膝裏に亘る範囲のフィット感を向上することができる。   In addition, when the movable support portion is a thigh side support portion provided at the front end portion of the seat main body, which is a component of the chair main body, the movable / locking mechanism may be attached to the seat main body, so that A fit feeling in the range from the thigh to the back of the knee can be improved.

本発明は、可動サポート部を、可動・ロック機構における可動部を回動軸を回動させることによって変形させて椅子本体に座った着座者の体にフィットさせた状態で、可動・ロック機構の調節部を調節することで摩擦部材を回動軸に当接させてその摩擦力で回動軸を固定し、それに伴って可動部及び可動サポート部を固定するように構成した椅子である。したがって、本発明の椅子によれば、着座者の体型、姿勢、好み等の使用態様に対応するように可動サポート部を変形させて着座者の体にフィットさせた位置での固定を簡便に且つ簡易な構造で行うことが可能であり、着座者による可動サポート部のフィット感の容易な調整が可能である。   In the present invention, the movable support portion of the movable / lock mechanism is deformed by rotating the rotary shaft to fit the body of the seated person sitting on the chair body. The chair is configured such that the friction member is brought into contact with the rotation shaft by adjusting the adjustment portion, the rotation shaft is fixed by the friction force, and the movable portion and the movable support portion are fixed accordingly. Therefore, according to the chair of the present invention, the movable support portion is deformed so as to correspond to the usage mode such as the body shape, posture, preference, etc. of the seated person, and can be easily fixed at the position fitted to the body of the seated person. It is possible to carry out with a simple structure, and a seated person can easily adjust the fit of the movable support part.

以下、本発明の一実施形態を、図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図1及び図2に示す本実施形態の椅子1は、着座者(図示省略)の体(胴)の側部にフィットして快適な着座感が得られるようにした可動サポート部たる背凭れサイドサポート部7を備えてなるものである。すなわちこの椅子1は、椅子本体2に取り付けた可動・ロック機構8(同図、網掛けを付した部位)によって背凭れサイドサポート部7を適宜の状態に変形させ得るようにしている。   The chair 1 of this embodiment shown in FIG.1 and FIG.2 fits the side part of the body (torso) of a seated person (illustration omitted), and the backrest side support which is a movable support part which was able to obtain a comfortable seating feeling. The unit 7 is provided. That is, the chair 1 is configured such that the backrest side support portion 7 can be deformed into an appropriate state by a movable / lock mechanism 8 (the portion shown by shading in the figure) attached to the chair body 2.

まず椅子本体2は、椅子1の全体的な概略形状を規定するものであり、背凭れシェル31、背凭れクッション(図示省略)及び背凭れカバー32(同図、破線部)を具備する背凭れ部3と、座シェル(図示省略)、座クッション(図示省略)及び座カバー41を具備する座部4と、脚支柱51、脚羽根52及びキャスタ53を具備する脚部5と、左右一対の肘掛け部6とから構成される。   First, the chair body 2 defines an overall schematic shape of the chair 1 and includes a backrest shell 31, a backrest cushion (not shown), and a backrest cover 32 (the broken line portion in the figure). Part 3, a seat part 4 comprising a seat shell (not shown), a seat cushion (not shown) and a seat cover 41, a leg part 5 comprising leg struts 51, leg blades 52 and casters 53, and a pair of left and right It is comprised from the armrest part 6. FIG.

特に背凭れシェル31は、正面視概略瓢箪型をなす合成樹脂素材の一体成形品であり、その外縁部を形作るシェルフレーム31fと、このシェルフレーム31fの内側において保形性及び補強性の向上のために縦横に配置された複数本のリブ31rとを主体とするものである。このような形状のため、背凭れシェル31において着座者Pの背中から肩口の範囲を支持する上半部における両側端部と背中から腰の範囲を支持する下半部の両側端部との間には、側方に向かって開放された凹部31aが形成されることになる。そして、この凹部31a内に向けて突出するように、背凭れシェル31の上半部の左右両側部からそれぞれ補助サポート板31b、31bと、背凭れシェル31の下半部の左右両側部からそれぞれ補助サポート板31c、31cとを、シェルフレーム31fと一体に形成している。これら各補助サポート板31b、31cは、いずれも背凭れシェル31の一部を構成するものでもあり、可撓変形可能な薄板状をなしている。   In particular, the backrest shell 31 is an integrally molded product of a synthetic resin material that has a generally saddle shape when viewed from the front. A shell frame 31f that forms the outer edge of the backrest shell 31 and an improvement in shape retention and reinforcement within the shell frame 31f. For this purpose, a plurality of ribs 31r arranged vertically and horizontally are mainly used. Due to such a shape, the back shell 31 is located between the both side ends in the upper half supporting the range of the back and shoulders of the seated person P and the both ends of the lower half supporting the range from the back to the waist. In this case, a concave portion 31a opened to the side is formed. And from the left and right sides of the upper half of the backrest shell 31, respectively, from the left and right sides of the lower half of the backrest shell 31, respectively, from the left and right sides of the upper half of the backrest shell 31 so as to protrude into the recess 31a. The auxiliary support plates 31c and 31c are formed integrally with the shell frame 31f. Each of these auxiliary support plates 31b, 31c constitutes a part of the backrest shell 31, and has a thin plate shape that can be flexibly deformed.

なお、座部4の前端部には、図示しないラチェット機構を配置しており、図7(a)に示すように着座者Pがその前端部を手で持って上下に動かせて同図(b)に示すように角度を調節することができるようにすることで、座部4の奥行き寸法を着座者Pの体格や姿勢等に応じて調整することが可能となっている。   A ratchet mechanism (not shown) is arranged at the front end portion of the seat portion 4, and as shown in FIG. 7 (a), the seated person P can hold the front end portion by hand and move it up and down. ), The depth dimension of the seat portion 4 can be adjusted according to the physique and posture of the seated person P.

背凭れサイドサポート部7、7は、背凭れ部3の両側端部に対をなして設定している。すなわち各背凭れサイドサポート部7は、背凭れクッションの両側端部と、背凭れカバー32のうち背凭れクッションの両側端部を包囲する部位(両側端部)32a、32aから構成される。背凭れクッションは、例えばウレタン等の柔軟な素材からなるものであり、背凭れカバー32の両側端部32a、32aは他の部位よりも伸縮自在な織り方を施すことにより、背凭れサイドサポート部7の変形に対応し得るようにしている。   The backrest side support portions 7 and 7 are set in pairs on both side end portions of the backrest portion 3. That is, each backrest side support part 7 is comprised from the both-sides edge part of the backrest cushion, and the site | part (both edge part) 32a, 32a surrounding the both-sides edge part of the backrest cushion among the backrest covers 32. The backrest cushion is made of, for example, a flexible material such as urethane, and both side end portions 32a and 32a of the backrest cover 32 are subjected to a weaving method that is more extensible than the other portions, whereby the backrest side support portion 7 is provided. It can be adapted to the deformation of.

可動・ロック機構8は、図3、図4及び図5に示すように、背凭れサイドサポート部7の変形をサポートし、着座者Pの所望の位置で固定するものである。本実施形態において可動・ロック機構8は、背凭れシェル31に取り付けられる取付部81と、背凭れサイドサポート部7を支持する左右一対の可動部82、82と、各可動部82を取付部81に対して回動動作させるための回動軸83、83と、適宜の回動位置で回動軸83、83にそれぞれ当接してその回動動作を停止させる摩擦部材84、84と、各摩擦部材84と回動軸83との間の摩擦力を調節する調節部85を主体として構成される。取付部81は、上下に離間して配置される板状部材811、811から構成され、これら板状部材811、811を背凭れシェル31に対して背面側からビス止め又は溶接等により取り付けている。可動部82、82は、取付部81の両側端部において羽根状をなして配置したものであり、起立姿勢(厳密に鉛直方向とは限らない)で取付部81の両側端部と各可動部82、82の内側端部との間に配置した回動軸83、83回りに回動可能としている。摩擦部材84、84は、上下の板状部材811、811の間においてそれらの両側端部に配置したゴム等の摩擦係数の大きな素材からなるものであり、外側端84a、84aを対応する回動軸83、83の軸周面に当接させてある。 As shown in FIGS. 3, 4 and 5, the movable / lock mechanism 8 supports deformation of the backrest side support portion 7 and is fixed at a desired position of the seated person P. In the present embodiment, the movable / lock mechanism 8 includes an attachment portion 81 attached to the backrest shell 31, a pair of left and right movable portions 82 and 82 that support the backrest side support portion 7, and each movable portion 82 as the attachment portion 81. Rotating shafts 83 and 83 for rotating the friction members, friction members 84 and 84 for contacting the rotating shafts 83 and 83 at appropriate rotation positions and stopping the rotation operation, and the friction members The adjustment part 85 which adjusts the frictional force between 84 and the rotating shaft 83 is comprised mainly. The attachment portion 81 is composed of plate-like members 811 and 811 that are spaced apart from each other in the vertical direction, and these plate-like members 811 and 811 are attached to the backrest shell 31 from the back side by screwing or welding or the like. . The movable parts 82, 82 are arranged in a blade shape at both end parts of the attachment part 81, and the both end parts of the attachment part 81 and each movable part in a standing posture (not strictly in the vertical direction). It is possible to turn around the turning shafts 83, 83 arranged between the inner end portions of 82, 82. The friction members 84, 84 are made of a material having a large friction coefficient such as rubber disposed between the upper and lower plate-like members 811, 811, and the outer ends 84 a, 84 a are rotated correspondingly. The shafts 83 and 83 are in contact with the shaft circumferential surface.

ここで、背凭れシェル31と可動部82、82との間に大きな隙間が生じて背凭れクッション及び背凭れカバー32によって着座者Pの体を十分にサポートできなくなる不具合を防止するべく、各可動部82と背凭れシェル31の上端部及び下端部との間には、補助サポート部9を形成している。具体的にこの補助サポート部9は、背凭れシェル31の上端部側両側部からそれぞれ前記凹部31a、31a内に突出するように設けた前記補助サポート板31b、31bと、背凭れシェル31の下端部側両側部からそれぞれ前記凹部31a、31a内に突出するように設けた前記補助サポート板31c、31cとから構成される。そして、上側の各補助サポート板31bの下端部と、各補助サポート板31cの上端部をそれぞれ対応する前記可動部82に取り付けている。具体的に説明すると、各可動部82には外側端部側において上下方向へ開口するスリット82aが形成されており、上側の補助サポート板31bを上方から前記スリット82aに挿入し、下側の補助サポート板31cを下方から前記スリット82aに挿入した状態で、当該スリット82a内において各補助サポート板31b、31cを重ね合わせて可動部82に対して共通のピン82bを用いて固定している。このようにすることで、各補助サポート板31b、31cは、可動部82の動きに追従して撓みつつ変形し、それに応じてこれら補助サポート板31b、31cの周囲の背凭れクッションや背凭れカバー32を変形させるようにしている。   Here, in order to prevent a problem that a large gap is generated between the back shell 31 and the movable parts 82 and 82 and the body of the seated person P cannot be sufficiently supported by the back cushion and the back cover 32, each movable body is prevented. An auxiliary support portion 9 is formed between the portion 82 and the upper and lower end portions of the back shell 31. Specifically, the auxiliary support portion 9 includes the auxiliary support plates 31b and 31b provided so as to protrude into the concave portions 31a and 31a from both side portions on the upper end portion side of the backrest shell 31, and the lower end of the backrest shell 31, respectively. The auxiliary support plates 31c and 31c are provided so as to protrude into the recesses 31a and 31a from both side portions. And the lower end part of each upper auxiliary support plate 31b and the upper end part of each auxiliary support plate 31c are attached to the corresponding movable parts 82, respectively. More specifically, each movable portion 82 is formed with a slit 82a that opens in the vertical direction on the outer end side, and the upper auxiliary support plate 31b is inserted into the slit 82a from above, and the lower auxiliary plate 31a is inserted. With the support plate 31c inserted into the slit 82a from below, the auxiliary support plates 31b and 31c are overlapped in the slit 82a and fixed to the movable portion 82 using a common pin 82b. By doing in this way, each auxiliary support plate 31b, 31c is deformed while flexing following the movement of the movable portion 82, and accordingly, a backrest cushion and a backrest cover around these auxiliary support plates 31b, 31c. 32 is deformed.

調節部85は、外力を入力して調節部85を機能させるための操作部86と、この操作部86の操作によって所定方向へ動作して摩擦部材84、84を対応する回動軸83、83と接離する方向へ移動させる駆動部材87とを備えている。操作部86は、下端部に操作リング86aを形成したネジ軸86bからなるものである。駆動部材87は、中央部において上下方向に前記ネジ軸86bを挿通させた板状をなす部材であり、前記上下の板状部材811、811の間において両側端部の摩擦部材84、84に挟まれる格好で配置されている。駆動部材87の内部においては、ネジ軸86bと螺合させたナット87aが組み込まれており、ネジ軸86bの回転によってナット87aごと駆動部材87が上下何れかに移動するように構成している。なお、ネジ軸86bの回転動作を容易なものとするために、操作リング86aには操作桿86cを引っ掛けており、この操作桿86cを回転させることでネジ軸86bが回転するようにしてある。また、駆動部材87と摩擦部材84、84との間には、駆動部材87の動作を摩擦部材の動作に変換するための動作変換手段88を形成している。具体的には動作変換手段88として、駆動部材87の両側端面を下向きに内寄りとなるテーパ面87b、87bとする一方、摩擦部材84、84の各内側端面も駆動部材87に対応するテーパ面84b、84bとすることにより、対応するテーパ面87b、84b同士を当接させた構成を採用している。すなわち、図5に示すように操作桿86cに対する回転操作を通じてネジ軸86bを回転させて駆動部材87を下方へ移動させると、そのテーパ面87bに摩擦部材84が押圧されて回動軸83に強く当接する結果、摩擦部材84と回動軸83との間の摩擦力が大きくなり、その抵抗で回動軸83が回動動作することができなくなる。反対に、図4に示すように駆動部材87が上方に位置しているときには、摩擦部材84と回動軸83との間の摩擦力はそれほど大きくないので、若干の抵抗に抗して回動軸83を回動させることができる。   The adjusting unit 85 inputs an external force to cause the adjusting unit 85 to function, and the operating unit 86 operates in a predetermined direction by operating the operating unit 86 to move the friction members 84 and 84 to the corresponding rotating shafts 83 and 83. And a drive member 87 that moves in a direction of contacting and separating. The operation portion 86 is composed of a screw shaft 86b having an operation ring 86a formed at the lower end. The drive member 87 is a plate-like member having the screw shaft 86b inserted in the vertical direction at the center, and is sandwiched between the upper and lower plate-like members 811 and 811 between the friction members 84 and 84 on both side ends. Arranged to be dressed. Inside the drive member 87, a nut 87a screwed with the screw shaft 86b is incorporated, and the drive member 87 is moved up and down together with the nut 87a by the rotation of the screw shaft 86b. In order to facilitate the rotation of the screw shaft 86b, an operating rod 86c is hooked on the operating ring 86a, and the screw shaft 86b is rotated by rotating the operating rod 86c. Further, an operation conversion means 88 for converting the operation of the drive member 87 into the operation of the friction member is formed between the drive member 87 and the friction members 84 and 84. Specifically, as the operation conversion means 88, both end surfaces of the drive member 87 are tapered surfaces 87b and 87b which are inwardly facing downward, and the inner end surfaces of the friction members 84 and 84 are also tapered surfaces corresponding to the drive member 87. By adopting 84b and 84b, the corresponding tapered surfaces 87b and 84b are brought into contact with each other. That is, as shown in FIG. 5, when the screw shaft 86b is rotated through the rotation operation with respect to the operating rod 86c and the drive member 87 is moved downward, the friction member 84 is pressed against the tapered surface 87b and strongly against the rotation shaft 83. As a result of the contact, the frictional force between the friction member 84 and the rotation shaft 83 increases, and the rotation shaft 83 cannot rotate due to the resistance. On the other hand, as shown in FIG. 4, when the drive member 87 is positioned upward, the frictional force between the friction member 84 and the rotation shaft 83 is not so large, so that it rotates against a slight resistance. The shaft 83 can be rotated.

本実施形態の椅子1は以上のような構成を有しているため、左右の背凭れサイドサポート部7、7を個別に変形することができる。すなわち、各背凭れサイドサポート部7を図6(a)に示すように着座者Pが手で持って同図(b)に示すように背凭れシェル31と略平行な位置から前方へ突出する位置までの範囲で、回動軸83を中心として可動部82と共に回動動作して変形する。そして、背凭れサイドサポート部7の適宜の変形位置で操作桿86cを回転させると、駆動部材87に押圧された摩擦部材84が回動軸83に強く当接して大きな摩擦力が生じると、可動部82及び背凭れサイドサポート部7がその位置で固定されることになる。   Since the chair 1 of the present embodiment has the above-described configuration, the left and right backrest side support portions 7 and 7 can be individually modified. That is, each backrest side support portion 7 is held by a seated person P by hand as shown in FIG. 6A and protrudes forward from a position substantially parallel to the backrest shell 31 as shown in FIG. In the range up to this point, the movable portion 82 is rotated and deformed around the rotation shaft 83 as a center. When the operating rod 86c is rotated at an appropriate deformation position of the backrest side support portion 7, the friction member 84 pressed by the drive member 87 strongly contacts the rotation shaft 83 to generate a large frictional force. 82 and the backrest side support part 7 will be fixed in that position.

以上のように、本実施形態の椅子1においては、着座者Pの体型、体格、姿勢、好み等の状況に対応して、背凭れサイドサポート部7を適宜の形状に変形させて体側部にフィットさせることで、快適な着座感を得ることができるものである。特に、一定の着座姿勢を維持することが多い場合には、図1に示したように左右の背凭れサイドサポート部7、7を相寄るように前方へ回動させた状態で固定することが好ましく、事務用椅子のように着席離席を頻繁に繰り返すような場合には、図2に示したように左右の背凭れサイドサポート部7、7を拡げた状態で固定しておくことが好ましい。また、これらの場合において背凭れサイドサポート部7、7を固定するための構造は、回動軸83、83に摩擦部材84、84を当接させた際に生じる摩擦力を利用するものであるので、簡易な構成を実現することができる。また、その摩擦力を調節する調節部85においては、操作部86の操作に対応して上下動作する駆動部87の動作を、テーパ面87bとテーパ面84bとの当接による摩擦部材84、84左右方向への移動に変換する動作変換手段88の機能によるものとしているので、背凭れサイドサポート部7、7の変形のための操作も極めて簡便である。さらに、補助サポート部9によって背凭れシェル31と可動部82との間における背凭れクッションが支持されるので、着座者Pに対する背凭れサイドサポート部7、7のフィット感をより向上することが可能である。   As described above, in the chair 1 of the present embodiment, the backrest side support portion 7 is deformed into an appropriate shape according to the situation such as the body shape, physique, posture, and preference of the seated person P, and fits to the body side portion. By doing so, a comfortable seating feeling can be obtained. In particular, when a constant sitting posture is often maintained, it is preferable that the left and right backrest side support portions 7 and 7 are fixed in a state of being rotated forward so as to come together as shown in FIG. When the seating and leaving are repeated frequently as in the office chair, it is preferable to fix the left and right backrest side support portions 7 and 7 in an expanded state as shown in FIG. Further, in these cases, the structure for fixing the backrest side support portions 7 and 7 uses the frictional force generated when the friction members 84 and 84 are brought into contact with the rotation shafts 83 and 83. A simple configuration can be realized. Further, in the adjustment unit 85 that adjusts the frictional force, the operation of the drive unit 87 that moves up and down in response to the operation of the operation unit 86 is performed by the friction members 84 and 84 by the contact between the tapered surface 87b and the tapered surface 84b. Since it is based on the function of the motion conversion means 88 that converts the movement in the left-right direction, the operation for deformation of the backrest side support portions 7 and 7 is extremely simple. Furthermore, since the backrest cushion between the backrest shell 31 and the movable portion 82 is supported by the auxiliary support portion 9, it is possible to further improve the fit of the backrest side support portions 7 and 7 with respect to the seated person P. is there.

なお、本発明は上述した実施形態に限られるものではない。例えば補助サポート部として機能する前記補助サポート板は、背凭れシェルと別体の部材として、背凭れシェルと可動部とに固定することで、可動部の動作に追従させることができる。また操作部には、図8及び図9に変形例として示すようなユニバーサルジョイント86j'を利用して、操作効率の向上を図ることも可能である。すなわち、操作部86'において斯かるユニバーサルジョイント86j'は、ネジ軸86b'の下端部に貫通孔86as'を有する取付部86a'を形成する一方、操作桿86c'の上端部に前記取付部86a'を挿入し得る二股部86d'を形成し、この二股部86d'に形成した長孔86ds'と前記取付部86a'の貫通孔86as'とに挿入した状態で固定したピン86e'とによって構成される。そして、操作桿86c'を回転させる操作によってネジ軸86b'を回転させると、上述した実施形態と同様に左右の背凭れサイドサポート部7、7を個別に変形させた状態で固定することができるようになる。   The present invention is not limited to the embodiment described above. For example, the auxiliary support plate functioning as an auxiliary support portion can be made to follow the operation of the movable portion by being fixed to the backrest shell and the movable portion as a separate member from the backrest shell. Further, it is possible to improve the operation efficiency by using a universal joint 86j ′ as a modified example in FIGS. That is, in the operation portion 86 ′, the universal joint 86j ′ forms an attachment portion 86a ′ having a through hole 86as ′ at the lower end portion of the screw shaft 86b ′, while the attachment portion 86a at the upper end portion of the operation rod 86c ′. A bifurcated portion 86d 'into which' can be inserted is formed, and a long hole 86ds' formed in the bifurcated portion 86d 'and a pin 86e' fixed in a state of being inserted into the through hole 86as' of the mounting portion 86a '. Is done. When the screw shaft 86b ′ is rotated by an operation of rotating the operating rod 86c ′, the left and right backrest side support portions 7 and 7 can be fixed in a state of being individually deformed, as in the above-described embodiment. become.

この他、例えば可動サポート部を座部の両側端部に設ける場合、座本体の一部に可動・ロック機構を組み込むことで、着座者の臀部から大腿部の側部に対するサポート性、フィット感を向上することができる。また、ヘッドレストを有する椅子に対しては、可動サポート部をヘッドレストの両側端部に設定すれば、ヘッドレスト本体の一部に可動・ロック機構を組み込むことで、着座者の側頭部に対するフィット感を向上することができる。また、上述の可動・ロック機構とは異なり、1つの可動部のみを有する可動・ロック機構を採用することもできる。その場合、例えば上述したラチェット機構に代えて、座部の前端部に可動サポート部を設定して可動・ロック機構を座部の前端部に組み込んで大腿サポート部とすることで、着座者の大腿部から膝の裏側周辺におけるサポート性が向上されることになる。   In addition, for example, when the movable support part is provided at both side ends of the seat part, the support and fit feeling from the seated person's buttocks to the thigh side part can be obtained by incorporating a movable / lock mechanism into a part of the seat body. Can be improved. In addition, for chairs with headrests, if the movable support part is set at both ends of the headrest, a movable / lock mechanism is incorporated into a part of the headrest body, so that the seated person's fit to the temporal region can be obtained. Can be improved. In addition, unlike the above-described movable / lock mechanism, a movable / lock mechanism having only one movable part may be employed. In that case, for example, instead of the ratchet mechanism described above, a movable support portion is set at the front end portion of the seat portion, and the movable / lock mechanism is incorporated into the front end portion of the seat portion to form a thigh support portion. Supportability from the thigh to the back of the knee is improved.

この他、上述した実施形態では、摩擦部材を回動軸に対して一方向から当接させる構成を採用したが、回動軸の周囲全体を取り囲むような摩擦部材や、回動軸に対して対向するに方向から当接するような摩擦部材を採用することも可能であり、その他、各部の具体的構成についても上記実施形態に限られることなく、本発明の趣旨を逸脱しない範囲で種々変形が可能である。   In addition, in the above-described embodiment, the configuration in which the friction member is brought into contact with the rotation shaft from one direction is adopted. However, the friction member that surrounds the entire periphery of the rotation shaft or the rotation shaft is used. It is also possible to employ a friction member that abuts from opposite directions, and the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. Is possible.

本発明の一実施形態に係る椅子の一状態を示す斜視図。The perspective view which shows one state of the chair which concerns on one Embodiment of this invention. 同椅子の他の状態を示す斜視図。The perspective view which shows the other state of the chair. 同実施形態における可動・ロック機構を拡大して示す斜視図。The perspective view which expands and shows the movable / lock mechanism in the same embodiment. 同可動・ロック機構の一状態を示す縦断面図。The longitudinal cross-sectional view which shows one state of the same movable and locking mechanism. 同可動・ロック機構の他の状態を示す縦断面図。FIG. 6 is a longitudinal sectional view showing another state of the movable / locking mechanism. 同実施形態における背部の動作説明図。The operation | movement explanatory drawing of the back part in the embodiment. 同実施形態における座部の動作説明図。Operation | movement explanatory drawing of the seat part in the embodiment. 同実施形態に適用可能な可動・ロック機構の変形例を示す斜視図。The perspective view which shows the modification of the movable and lock mechanism applicable to the embodiment. 同変形例を図4に対応して示す縦断面図。The longitudinal cross-sectional view which shows the modification corresponding to FIG.

符号の説明Explanation of symbols

1…椅子
2…椅子本体
3…背凭れ部
4…座部
7…可動サポート部(背凭れサイドサポート部)
8…可動・ロック機構
9…補助サポート部
81…取付部
82…可動部
83…回動軸
84…摩擦部材
84b…テーパ面
85…調節部
86…操作部
87…駆動部材
87b…テーパ面
88…動作変換手段
DESCRIPTION OF SYMBOLS 1 ... Chair 2 ... Chair main body 3 ... Backrest part 4 ... Seat part 7 ... Movable support part (backrest side support part)
DESCRIPTION OF SYMBOLS 8 ... Movable / lock mechanism 9 ... Auxiliary support part 81 ... Mounting part 82 ... Movable part 83 ... Rotating shaft 84 ... Friction member 84b ... Tapered surface 85 ... Adjusting part 86 ... Operation part 87 ... Drive member 87b ... Tapered surface 88 ... Action conversion means

Claims (12)

椅子の全体的な形状を規定して着座者の体を支持する椅子本体と、該椅子本体に沿って配置され着座者の体型、姿勢、好み等の使用状況に応じて部分的に変形可能な可動サポート部と、前記椅子本体に取り付けられ可動サポート部を動作又は停止させる可動・ロック機構とを具備する椅子において、
前記可動・ロック機構を、
椅子本体に取り付けられる取付部と、
可動サポート部を支持する可動部と、
取付部と可動部との間に介設されて可動部を取付部に対して回動動作可能とする回動軸と、
該回動軸に当接して摩擦力を発生させ可動部及び可動サポート部を適宜位置で停止させる摩擦部材と、
該摩擦部材と回動軸との間の摩擦力の大きさを調節する調節部と
を具備してなるものとしていることを特徴とする椅子。
A chair body that defines the overall shape of the chair and supports the occupant's body, and is arranged along the chair body, and can be partially deformed according to the use situation of the occupant's body shape, posture, preference, etc. In a chair comprising a movable support part and a movable / locking mechanism that is attached to the chair body and operates or stops the movable support part.
The movable / locking mechanism is
A mounting portion attached to the chair body;
A movable part that supports the movable support part;
A rotation shaft interposed between the attachment portion and the movable portion to enable the movable portion to rotate with respect to the attachment portion;
A friction member that abuts against the rotation shaft to generate a frictional force and stops the movable portion and the movable support portion at an appropriate position;
A chair comprising: an adjusting portion that adjusts the magnitude of the frictional force between the friction member and the rotating shaft .
前記調節部が、摩擦部材と回動軸との間の摩擦力の大きさを調節するための外力を入力する操作部と、該操作部の操作によって所定方向へ動作し前記摩擦部材を回動軸と接離する方向へ移動させる駆動部材とを具備している請求項1記載の椅子。 The adjusting unit inputs an external force for adjusting the magnitude of the frictional force between the friction member and the rotation shaft , and operates in a predetermined direction by the operation unit to rotate the friction member. The chair according to claim 1, further comprising a drive member that moves in a direction in which the shaft moves toward and away from the shaft. 前記駆動部材が、操作部の操作によって回動軸の軸心と略同一方向に移動するものであり、前記調節部に、該駆動部材の動作に追従して摩擦部材を回動軸の軸心と略直交する方向に移動させる動作変換手段を形成している請求項2記載の椅子。 The drive member is moved in substantially the same direction as the axis of the rotation shaft by the operation of the operation unit, and the friction member is moved to the adjustment unit so as to follow the operation of the drive member. The chair according to claim 2, wherein motion conversion means for moving in a direction substantially orthogonal to the movement is formed. 前記動作変換手段が、駆動部材において摩擦部材と対向する面に形成され回動軸の軸心方向に対して傾斜するテーパ面と、該テーパ面に対応して摩擦部材に形成したテーパ面とから構成される請求項3記載の椅子。 The motion converting means includes a tapered surface formed on a surface of the driving member facing the friction member and inclined with respect to the axial direction of the rotation shaft, and a tapered surface formed on the friction member corresponding to the tapered surface. A chair as claimed in claim 3 constructed. 前記可動サポート部を相対向する位置に2つ有している請求項1、2、3又は4記載の椅子。 The chair according to claim 1, 2, 3, or 4, wherein the movable support portion has two at opposite positions. 前記可動サポート部を相対向する位置に2つ有し、前記可動・ロック機構が、各可動サポート部に対応して各2つの可動部、回動軸及び摩擦部材を備え、前記調節部が、単一の操作部への操作によって単一の駆動部材を動作させることによって2つの摩擦部材を同時に移動させるものである請求項2、3又は4記載の椅子。 Two movable support portions are provided at opposing positions, and the movable / lock mechanism includes two movable portions, a rotation shaft, and a friction member corresponding to each movable support portion, and the adjustment portion includes: The chair according to claim 2, 3 or 4, wherein the two friction members are moved simultaneously by operating a single drive member by operating a single operation section. 各可動サポート部を個別に変形させた位置で、前記操作部への操作によって各可動部を同時に固定し得るように構成している請求項6記載の椅子。 The chair according to claim 6, wherein each movable part can be fixed simultaneously by operating the operation part at a position where each movable support part is individually deformed. 前記可動サポート部の内部において、椅子本体と可動・ロック機構における可動部との間に介在して可動部の動作に追従する補助サポート部を設けている請求項1、2、3、4、5、6又は7記載の椅子。 The auxiliary support part which follows between operation | movement of a movable part is provided in the inside of the said movable support part between the chair main body and the movable part in a movable / lock mechanism, and is provided. , 6 or 7 chair. 前記可動サポート部が、椅子本体の構成要素である背凭れ本体の側端部に設けられる背凭れサイドサポート部であって、可動・ロック機構を背凭れ本体に取り付けている請求項1、2、3、4、5、6、7又は8記載の椅子。 The said movable support part is a backrest side support part provided in the side edge part of the backrest main body which is a component of a chair main body, Comprising: The movable and locking mechanism is attached to the backrest main body. A chair according to 4, 5, 6, 7 or 8. 前記可動サポート部が、椅子本体の構成要素である座本体の側端部に設けられる座サイドサポート部であって、可動・ロック機構を座本体に取り付けている請求項1、2、3、4、5、6、7、8又は9記載の椅子。 The said movable support part is a seat side support part provided in the side edge part of the seat main body which is a component of a chair main body, Comprising: The movable * lock mechanism is attached to the seat main body, Claims 1, 2, 3, 4, The chair according to 5, 6, 7, 8 or 9. 前記可動サポート部が、椅子本体の構成要素であるヘッドレスト本体の側端部に設けられるヘッドレストサイドサポート部であって、可動・ロック機構をヘッドレスト本体に取り付けている請求項1、2、3、4、5、6、7、8、9又は10記載の椅子。 The said movable support part is a headrest side support part provided in the side edge part of the headrest main body which is a component of a chair main body, Comprising: The movable and locking mechanism is attached to the headrest main body, Claims 1, 2, 3, 4, The chair according to 5, 6, 7, 8, 9 or 10. 前記可動サポート部が、椅子本体の構成要素である座本体の前端部に設けられる大腿サイドサポート部であって、可動・ロック機構を座本体に取り付けている請求項1、2、3、4、5、6、7、8、9、10又は11記載の椅子。 The said movable support part is a thigh side support part provided in the front-end part of the seat main body which is a component of a chair main body, Comprising: The movable and locking mechanism is attached to the seat main body. , 6, 7, 8, 9, 10 or 11.
JP2003363793A 2003-10-23 2003-10-23 Chair Expired - Fee Related JP4185992B2 (en)

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