JP5606717B2 - Chair back - Google Patents

Chair back Download PDF

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Publication number
JP5606717B2
JP5606717B2 JP2009240146A JP2009240146A JP5606717B2 JP 5606717 B2 JP5606717 B2 JP 5606717B2 JP 2009240146 A JP2009240146 A JP 2009240146A JP 2009240146 A JP2009240146 A JP 2009240146A JP 5606717 B2 JP5606717 B2 JP 5606717B2
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Prior art keywords
frame
backrest
friction member
upholstery material
high friction
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JP2009240146A
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JP2011083518A (en
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健 中山
浩一郎 脇園
僚 五十嵐
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Okamura Corp
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Okamura Corp
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Priority to JP2009240146A priority Critical patent/JP5606717B2/en
Application filed by Okamura Corp filed Critical Okamura Corp
Priority to US13/503,001 priority patent/US20120212027A1/en
Priority to KR1020127009933A priority patent/KR20120098633A/en
Priority to EP10824921.0A priority patent/EP2491821A4/en
Priority to CA2778163A priority patent/CA2778163A1/en
Priority to PCT/JP2010/068341 priority patent/WO2011049072A1/en
Priority to CN2010800469546A priority patent/CN102573571A/en
Publication of JP2011083518A publication Critical patent/JP2011083518A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/04—Metal chairs, e.g. tubular
    • A47C5/06—Special adaptation of seat upholstery or fabric for attachment to tubular chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/02—Upholstery attaching means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Description

本発明は、背フレームに、袋状の張り材を被嵌して張設してなる椅子の背凭れに関する。   The present invention relates to a backrest of a chair formed by covering a back frame with a bag-like tension material.

この種の椅子の背凭れとしては、例えば特許文献１及び２に記載されているものがある。   As a backrest of this type of chair, for example, there are those described in Patent Documents 1 and 2.

欧州特許出願公開第０９２２４１９号明細書European Patent Application No. 0922419 特開２００３−１３５２００号公報JP 2003-135200 A

上記特許文献１及び２に記載されている背凭れにおける袋状の張り材には、通気性と伸縮性、及び引張強度等の観点から、合成繊維をメッシュ状に編成したものが使用されることが多い。
このような張り材を、所定の緊張状態をもって背フレームに被嵌して張設すると、座者が背凭れに凭れ掛けた際に、背フレームの後側に位置する張り材の後面部が引っ張られて前方に回り込むことにより、背フレームの前側に位置する張り材の前面部が後方に適度に撓むことができる。
この際に、張り材の下部の両側部と、背フレームにおける左右の側部フレームの外側面との接触部の摺動抵抗が小さいと、張り材の下部の両側部がずり上がるなどして、張り材に弛みや皺が生じることがある。
また、座者の腰部付近を支持する張り材の下部の両側部と、側部フレームの外側面との接触部の摺動抵抗が小さいと、張り材の下部の両側部が、背フレームの前面側に簡単に回り込み、張り材における座者の腰部付近を支持する前面部が後方に過度に撓むようになるため、ランバーサポート効果を発揮することができず、座者の腰部付近を快適に支持することができない。 As the bag-like upholstery material in the backrest described in Patent Documents 1 and 2, synthetic fibers knitted in a mesh shape are used from the viewpoints of air permeability, stretchability, tensile strength, and the like. There are many.
When such a tension member is fitted and stretched on the back frame with a predetermined tension state, when the seated person leans on the backrest, the rear surface portion of the tension material located on the rear side of the back frame is pulled. Then, the front part of the upholstery material positioned on the front side of the back frame can be appropriately bent rearward by turning forward.
At this time, if the sliding resistance of the contact portion between the lower side of the upholstery material and the outer surface of the left and right side frames in the back frame is small, the lower side of the upholstery material will slide up, etc. Looseness or wrinkles may occur on the upholstery.
In addition, if the sliding resistance between the lower side of the tension member supporting the vicinity of the waist of the seat and the outer surface of the side frame is small, the lower side of the tension member will be The front part of the upholstery that supports the vicinity of the lumbar of the occupant's waist will bend excessively backward, so the lumbar support effect cannot be exerted, and the occupant's waist is comfortably supported. I can't.

本発明は、上記問題点に鑑みてなされたもので、側部フレームに対し、張り材下部の両側部を摺動しにくくすることにより、張り材のずり上がりによる弛み等の発生を防止しうるようにするとともに、張り材下部の前面部が後方に過度に撓むの防止して、座者の腰部付近を快適に支持しうるようにした椅子の背凭れを提供することを目的としている。   The present invention has been made in view of the above problems, and by making it difficult for both sides of the lower part of the tension member to slide relative to the side frame, it is possible to prevent the occurrence of slack or the like due to the rising of the tension material. Another object of the present invention is to provide a backrest of a chair that prevents the front portion of the lower part of the upholstery material from being excessively bent rearward and can comfortably support the vicinity of the waist of a seated person.

本発明によると、上記課題は、次の各項のようにして解決される。
（１）上下方向を向く左右１対の側部フレームを有する背フレームに、袋状の張り材を被嵌して張設してなる椅子の背凭れにおいて、前記張り材における座者の腰部付近を支持する下部側の両側部内面と、その部分に接触する前記左右の側部フレームの外側面との少なくともいずれか一方に、張り材と側部フレームとの接触部の摺動抵抗を大としうる高摩擦部材を設け、かつこの高摩擦部材の一側端部を、前記張り材を袋状に形成するべく、その両側端部を内方に折り重ねて縫着した縫着部に、この縫着部を覆うようにして固定する。 According to the present invention, the above-mentioned problems are solved as follows.
(1) In a backrest of a chair in which a bag-like tension material is fitted and stretched on a back frame having a pair of left and right side frames facing in the vertical direction, in the vicinity of the waist of a seated person in the tension material The sliding resistance of the contact portion between the upholstery material and the side frame is increased on at least one of the inner surfaces of both sides on the lower side supporting the lower side and the outer surfaces of the left and right side frames contacting the portion. A high friction member , and one end portion of the high friction member is formed on a sewn portion obtained by folding the both end portions inwardly and sewing to form the upholstery material in a bag shape. it fixed so as to cover the sewed portion.

このような構成とすると、側部フレームに対し、張り材下部の両側部が摺動しにくくなるので、張り材の下部がずり上がり、張り材に弛みや皺等が発生するのが防止される。
また、座者が背凭れに凭れ掛けた際に、張り材の下部の両側部が、背フレームの前面側に回り込みにくくなるため、座者の腰部付近を支持する張り材の下部の前面部が過度に後方に撓むのが防止され、ランバーサポート効果により、座者の腰部付近を快適に支持することができる。 With such a configuration, both sides of the lower part of the tension material are less likely to slide with respect to the side frame, so that the lower part of the tension material is prevented from rising, and slack and wrinkles are prevented from occurring in the tension material. .
In addition, when the seated person leans on his back, both sides of the lower part of the upholstery are less likely to go around the front side of the back frame, so the front part of the lower part of the upholstery that supports the vicinity of the waist of the seated person Excessive backward bending is prevented, and the lumbar support effect can comfortably support the vicinity of the waist of the seated person.

（２）上記(１)項において、高摩擦部材の一側端部を、張り材の縫着部に、縫着により固定する。 (2) In the above item (1) , one end portion of the high friction member is fixed to the sewing portion of the upholstery material by sewing.

このような構成とすると、張り材の両側端部の縫着部を覆う高摩擦部材の一側端部を、張り材の縫着部に、縫着により固定したことにより、張り材の両側端部が補強され、ほつれ等が発生する恐れがない。
また、張り材の下部は、その両側部内面に固定した高摩擦部材を介して、側部フレームに摺接しているので、張り材の下部の両側部が摩耗するのが抑えられ、張り材を張り替える時期が延びて、コストが削減される。 With this configuration, the one end of the high friction member will covering the sewing portion of both ends of the tension member, the sewn portion of the upholstery, by fixed by sewing both sides of the upholstery The edges are reinforced and there is no risk of fraying.
Also, since the lower part of the upholstery material is in sliding contact with the side frame via a high friction member fixed to the inner surface of both side parts, it is possible to suppress wear on both side parts of the lower part of the upholstery material, The time for replacement is extended and costs are reduced.

（３）上記(１)または(２)項において、高摩擦部材を、ポリウレタン樹脂またはその発泡体、ウレタン系エラストマー、ゴムのいずれかにより形成する。 (3) In the above item (1) or (2), the high friction member is formed of any one of a polyurethane resin or a foam thereof, a urethane elastomer, and rubber.

このような構成とすると、いずれの材料も、高摩擦部材として好ましく、かつ成形が容易で汎用性が高い材料であるので、比較的安価に実施することができる。   With such a configuration, any material is preferable as a high-friction member, and is easy to mold and highly versatile. Therefore, it can be implemented at a relatively low cost.

本発明によれば、張り材のずり上がりによる弛み等の発生を防止しうるとともに、張り材下部の前面部が後方に過度に撓むの防止して、座者の腰部付近を快適に支持しうるようにした椅子の背凭れを提供することができる。   According to the present invention, it is possible to prevent the occurrence of slack due to the uplift of the upholstery material, and to prevent the front part of the lower part of the upholstery material from being excessively bent backward, thereby comfortably supporting the vicinity of the waist of the seated person. Can provide a backrest for a chair that can be raised.

本発明の背凭れの一実施形態を備える椅子の待機状態の側面図である。It is a side view of the waiting state of a chair provided with one embodiment of the backrest of the present invention. 同じく、着座状態の側面図である。Similarly, it is a side view of a sitting state. 背フレームに張り材を被嵌する前の状態を背凭れの斜め後方より見た斜視図である。It is the perspective view which looked at the state before putting a tension material in a back frame from the back diagonally backward. 図１のIV-IV線における拡大横断面図である。FIG. 4 is an enlarged cross-sectional view taken along line IV-IV in FIG. 1. 同じく、V-V線における拡大横断面図である。Similarly, it is an enlarged cross-sectional view taken along line V-V. 図４のＡ部の拡大図である。It is an enlarged view of the A section of FIG. 図５のＢ部の拡大図である。It is an enlarged view of the B section of FIG. 背フレームへの低摩擦部材及び高摩擦部材の取付形態の変形例を示す拡大断面図である。It is an expanded sectional view which shows the modification of the attachment form of the low friction member and high friction member to a back frame. 同じく、背フレームへの低摩擦部材及び高摩擦部材の取付形態の他の変形例を示す拡大断面図である。Similarly, it is an expanded sectional view showing other modifications of the attachment form of the low friction member and the high friction member to the back frame.

以下、本発明の実施形態を、図面に基づいて説明する。
図１及び図２は、本発明の背凭れの一実施形態を備える椅子の側面図であり、この椅子は、円板状のベース１の中央に脚柱２を立設し、この脚柱２の上端に支基３を固着した下部構成体４を備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 is a side view of a chair provided with one embodiment of the backrest of the present invention, and this chair has a pedestal 2 standing upright at the center of a disk-shaped base 1, and this pedestal 2 The lower structure 4 which fixed the support base 3 to the upper end of this is provided.

支基３は、平面視および側面視において、脚柱２の上端より前方に向かってほぼ三角形状に拡開する形状をなしている。   The support base 3 has a shape that expands in a substantially triangular shape toward the front from the upper end of the pedestal 2 in a plan view and a side view.

支基３の前端部には、座５の前下部が、左右方向の基軸６をもって枢着され、座５は、図１に示すように、後上向きに傾斜する待機位置と、図２に示すように、水平か、やや後下向きに傾斜する使用位置とに、基軸６を中心として回動しうるようになっている。   The front lower portion of the seat 5 is pivotally attached to the front end portion of the support base 3 with a base shaft 6 in the left-right direction, and the seat 5 is, as shown in FIG. Thus, it can rotate centering on the base shaft 6 to the use position which inclines horizontally or slightly rearwardly downward.

座５の両側後部において、座５には、左右１対の肘掛け７、７が、一体的に形成されている。
各肘掛け７は、座５の後部両側から起立し、かつ後面が、後記する背凭れ９の支軸１１を中心とする側面視半円弧状または扇形の湾曲面８に突出する背凭れ枢支部７ａと、この背凭れ枢支部７ａの上部より前向きに延出する上向弧状の肘当て部７ｂとからなり、全体の形状は、前上方に向かって収束する側面視ほぼ前向三角形をなしている。 A pair of left and right armrests 7 and 7 are integrally formed on the seat 5 at the rear portions on both sides of the seat 5.
Each armrest 7 rises from both sides of the rear portion of the seat 5 and the back surface of the backrest pivot portion 7a protrudes from a curved surface 8 having a semicircular arc shape or a fan shape as viewed from the side centering on a support shaft 11 of the backrest 9 described later. And an upward arc-shaped elbow rest 7b extending forward from the upper portion of the backrest pivot support portion 7a, and the overall shape is substantially a forward triangle in a side view converging toward the front upper direction. .

肘当て部７ｂの前後方向の寸法は、その前端部が、図１に示す待機位置において、座５の枢着部である基軸６の中心を通る垂直線Ｓよりも前方に位置するように設定されている。
また、図２に示すように、座５が使用位置にあるときには、肘当て部７ｂの前端部が、上記垂直線Ｓよりも後方、すなわち座５が枢着されている基軸６よりも若干後方に位置するようにしてある。 The front and rear dimensions of the elbow rest 7b are set so that the front end of the elbow rest 7b is positioned forward of the vertical line S passing through the center of the base shaft 6 that is the pivotally mounted portion of the seat 5 in the standby position shown in FIG. Has been.
Further, as shown in FIG. 2, when the seat 5 is in the use position, the front end portion of the elbow rest 7b is behind the vertical line S, that is, slightly behind the base shaft 6 on which the seat 5 is pivotally attached. It is supposed to be located at.

左右の肘掛け７、７における背凭れ枢支部７ａのやや前方寄りの外側面には、背凭れ９の両側下部より前方に延出する前向側片１０の前端部が、ほぼ左右方向を向く支軸１１をもって枢着され、背凭れ９は、座５および肘掛け７に対して、図２に示す起立位置と、図示しない後傾位置とに、支軸１１を中心として回動しうるようになっている。   The front end of the forward side piece 10 extending forward from the lower part of both sides of the backrest 9 is supported on the outer surface of the backrest pivot support portion 7a of the left and right armrests 7 and 7 slightly forward. The backrest 9 is pivotally attached to the shaft 11 so that the backrest 9 can rotate with respect to the seat 5 and the armrest 7 around the support shaft 11 between a standing position shown in FIG. ing.

背凭れ９の両側下部における背凭れ枢支部７ａの後面と対向する部分は、背凭れ枢支部７ａの後面の湾曲面８とほぼ補形をなす円弧状の凹曲面１２としてあり、互いの対向面が近接するようにして、背凭れ９は、支軸１１を中心として回動しうるようになっている。背凭れ９における後記する下部フレーム２０の左右方向の中央部と、支基３の前端部上面との間には、背凭れ９を起立方向に付勢するガススプリング、または圧縮ばね等からなる第１の付勢手段１３が設けられている。   A portion of the lower part of the backrest 9 opposite to the rear surface of the backrest pivot portion 7a is an arcuate concave curved surface 12 that is substantially complementary to the curved surface 8 of the rear surface of the backrest pivot portion 7a. So that the backrest 9 can move around the support shaft 11. Between the center part in the left-right direction of the lower frame 20 to be described later in the backrest 9 and the upper surface of the front end portion of the support base 3, a gas spring or a compression spring that urges the backrest 9 in the standing direction is provided. One urging means 13 is provided.

また、支基３内には、座５を待機位置に向かって付勢することにより、着座者が起立するのを補助しうる第２の付勢手段１４が設けられている。
この第２の付勢手段１４は、例えば軸線が左右方向を向くゴムトーションユニット１５と、このゴムトーションユニット１５に連係され、図１において側面視反時計方向に付勢された後方を向く第１リンク１６と、この第１リンク１６の先端部に左右方向の軸をもって下端部が枢着され、かつ上端部が、座５の前後方向の中間部の下面に、左右方向の軸をもって枢着された斜め後上方を向く第２リンク１７とからなっている。 Further, in the support base 3, there is provided second urging means 14 that can assist the seated person to stand by urging the seat 5 toward the standby position.
The second urging means 14 includes, for example, a rubber torsion unit 15 whose axis is directed in the left-right direction, and a first that is linked to the rubber torsion unit 15 and is urged counterclockwise in a side view in FIG. A lower end portion is pivotally attached to the link 16 and the distal end portion of the first link 16 with a left and right axis, and an upper end portion is pivotally attached to a lower surface of an intermediate portion in the front and rear direction of the seat 5 with a left and right axis. And a second link 17 facing diagonally upward.

図３に示すように、背凭れ９は、上下方向を向き、かつ下端に上記前向側片１０が連設された、前後寸法が下方に向かって漸次大をなす左右１対の側部フレーム１８、１８の上端同士を、左右方向を向く上部フレーム１９により連結し、かつ両側部フレーム１８、１８の下端同士を、左右方向を向く下部フレーム２０により連結し、さらに、上部フレーム１９と下部フレーム２０の左右方向の中間部同士を、両側部フレーム１８、１８より後方に位置する上下方向を向く中間フレーム２１をもって連結することにより形成した、正面形が縦長方形枠状の背フレーム２２を備えている。   As shown in FIG. 3, the backrest 9 is a pair of left and right side frames whose front and rear dimensions are gradually increased downward, with the front side piece 10 continuously provided at the lower end and facing upward and downward. The upper ends of 18 and 18 are connected by an upper frame 19 facing in the left-right direction, the lower ends of both side frames 18 and 18 are connected by a lower frame 20 facing in the left-right direction, and the upper frame 19 and the lower frame are further connected. 20 includes a back frame 22 having a vertically rectangular frame shape, which is formed by connecting 20 intermediate portions in the left-right direction with an intermediate frame 21 facing the vertical direction located behind the both side frames 18, 18. Yes.

この背フレーム２２は、適度の弾性を有する合成樹脂材料により一体的に形成されている。この合成樹脂材料には、ガラス繊維や炭素繊維等の強化繊維を加えて強度を高めておくのが好ましい。   The back frame 22 is integrally formed of a synthetic resin material having moderate elasticity. It is preferable to add strength fibers such as glass fibers and carbon fibers to the synthetic resin material to increase the strength.

両側部フレーム１８、１８の下部と、中間フレーム２１の下部とは、側面視において、曲率中心が前方に位置する円弧状の湾曲形状とされ、上部フレーム１９と下部フレーム２０とは、平面視において、中間部が両側部より後方に位置する湾曲形状としてある。これにより、背フレーム２２に後記する袋状の張り材２６を張設した際、張り材２６における背フレーム２２の前方及び後方に位置する前面部と後面部とが、前後に比較的大きく離間するようになる。
また、背凭れ９の下部も、座５および肘掛け７の後端より後方に離間することにより、背凭れ９が回動する際、座５および肘掛け７の後端と干渉するのが防止され、背凭れ９の後方への回動範囲を大とすることができる。 The lower portions of the side frames 18 and 18 and the lower portion of the intermediate frame 21 have an arcuate curved shape with the center of curvature positioned forward in a side view, and the upper frame 19 and the lower frame 20 are in a plan view. The curved shape is such that the intermediate portion is located behind the both side portions. As a result, when a bag-like tension member 26, which will be described later, is stretched on the back frame 22, the front surface portion and the rear surface portion positioned in front and rear of the back frame 22 in the tension material 26 are relatively separated from each other in the front-rear direction. It becomes like this.
Further, the lower part of the backrest 9 is also separated rearward from the rear ends of the seat 5 and the armrest 7, so that when the backrest 9 rotates, it is prevented from interfering with the rear end of the seat 5 and the armrest 7, The range of rotation of the backrest 9 to the rear can be increased.

中間フレーム２１は、背フレーム２２における他のフレーム構成部材より細く形成することにより、他部より弾性変形し易くしてあり、後述する張り材２６の前面部に負荷が掛かった際に、中間フレーム２１が前方に弾性変形しうるようにしてある。   The intermediate frame 21 is formed to be thinner than the other frame components in the back frame 22 so as to be more easily elastically deformed than the other portions. When a load is applied to the front surface portion of the tension member 26 described later, the intermediate frame 21 21 can be elastically deformed forward.

背フレーム２２の上端には、両側部フレーム１８、１８の上端に、上方を向き、かつ側面視において中間部が上下部より前方に位置するように湾曲する延長フレーム２３、２３を連設し、両延長フレーム２３、２３の上端同士を、左右方向を向く頂部フレーム２４により連結することにより形成したヘッドレストフレーム２５が一体的に設けられている。   At the upper end of the back frame 22, extension frames 23, 23 are connected to the upper ends of the side frames 18, 18 so as to face upward and bend so that the intermediate portion is positioned forward of the upper and lower portions in a side view. A headrest frame 25 formed by connecting the upper ends of the extension frames 23 and 23 with a top frame 24 facing in the left-right direction is integrally provided.

図３に示すように、背フレーム２２とヘッドレストフレーム２５とには、下端と両側下部とが開口する伸縮性を有する袋状の張り材２６が、上方より被嵌して張設されている。この張り材２６は、例えば合成繊維をメッシュ状に編成したものよりなっている。張り材２６は、ヘッドレストフレーム２５を覆うヘッドレスト覆い部２７と、背フレーム２２を覆う背凭れ覆い部２８とからなっている。   As shown in FIG. 3, the back frame 22 and the headrest frame 25 are stretched so as to be fitted and stretched from above with a stretchable bag-like upholstery material 26 whose lower ends and lower portions on both sides open. The upholstery material 26 is made of, for example, a synthetic fiber knitted in a mesh shape. The upholstery material 26 includes a headrest cover portion 27 that covers the headrest frame 25 and a backrest cover portion 28 that covers the back frame 22.

張り材２６は、その両側下部の開口から、左右の前向側片１０、１０を前方に向けて突出させ、かつ背フレーム２２の前方及び後方に位置する前面部２８ａと後面部２８ｂとの下端部同士を、背フレーム２２における下部フレーム２０の下方において、面ファスナ、ホック、ファスナ、その他の結合手段(いずれも図示略)により互いに結合することにより、所定の緊張状態をもって背フレーム２２とヘッドレストフレーム２５に張設されている。   The upholstery material 26 has left and right front side pieces 10 and 10 projecting forward from the lower openings on both sides thereof, and lower ends of a front surface portion 28a and a rear surface portion 28b positioned in front and rear of the back frame 22. The parts are connected to each other below the lower frame 20 of the back frame 22 by hooking fasteners, hooks, fasteners, and other connecting means (all not shown), so that the back frame 22 and the headrest frame have a predetermined tension. 25 is stretched.

なお、ヘッドレストを必要としないときは、ヘッドレストフレーム２５及び張り材２６におけるヘッドレスト覆い部２７を省略して実施すればよい。   When a headrest is not required, the headrest cover 25 in the headrest frame 25 and the upholstery material 26 may be omitted.

図３〜図７に示すように、張り材２６の両側部の内面、すなわち、背フレーム２２の側部フレーム１８、１８における前向側片１０部を除く外側面と、ヘッドレストフレーム２５の延長フレーム２３、２３の外側面とに接触する部分の内面には、両フレーム１８、２３に対し摺動抵抗の小さな薄肉可撓性の低摩擦部材２９、２９が取り付けられている。   As shown in FIGS. 3 to 7, the inner surface of both sides of the upholstery material 26, that is, the outer surface of the side frames 18, 18 of the back frame 22 except for the forward-facing side piece 10, and the extension frame of the headrest frame 25. Thin and flexible low friction members 29 and 29 having a small sliding resistance with respect to both frames 18 and 23 are attached to the inner surfaces of the portions contacting the outer surfaces of 23 and 23.

また、座者の腰部付近を支持する張り材２６の両側部内面、すなわち、両側部フレーム１８の下部の外側面に接触する張り材２６の内面には、側部フレーム１８に対し摺動抵抗の大きな薄肉可撓性の高摩擦部材３０、３０が取り付けられている。   Further, the inner surface of both sides of the upholstery material 26 that supports the vicinity of the waist of the seated person, that is, the inner surface of the upholstery material 26 that contacts the outer side surface of the lower part of the side frame 18 has a sliding resistance against the side frame 18. Large thin flexible high friction members 30, 30 are attached.

上記低摩擦部材２９の材質としては、例えばポリアミド樹脂(商品名ナイロン)、フッソ樹脂(テフロン(登録商標)、商品名ダイフロン)、ポリアセタール等が好ましく、また、高摩擦部材３０の材質としては、例えばポリウレタン樹脂またはその発泡体、ウレタン系エラストマー、ゴム等が好ましい。   As the material of the low friction member 29, for example, polyamide resin (trade name nylon), fluorine resin (Teflon (registered trademark), trade name Daiflon), polyacetal, and the like are preferable, and the material of the high friction member 30 is, for example, Polyurethane resin or its foam, urethane elastomer, rubber and the like are preferable.

図６及び図７の拡大断面図に示すように、張り材２６は、その両側端部を、左右の側部フレーム１８と延長フレーム２３のいずれか一方の前部側の内面と近接する位置において、内方に折り重ねて縫い合わせることにより、袋状に形成されており、この縫い合わせと同時に、低摩擦部材２９及び高摩擦部材３０の前端部におけるＵ字状に折り返した部分が、張り材２６の折り重ね部を覆うようにして縫着されている。このようにすると、張り材２６の両側端部の縫着部２６ａが補強される。なお、低摩擦部材２９及び高摩擦部材３０をＵ字状に折り返さないで、それらの前端部を、単に張り材２６の両側端部の縫着部２６ａに同時に縫着してもよい。   As shown in the enlarged sectional views of FIGS. 6 and 7, the upholstery material 26 is located at a position where both side ends thereof are close to the inner surface on the front side of one of the left and right side frames 18 and the extension frame 23. The bag is formed in a bag shape by being folded inwardly and stitched, and at the same time as the stitching, the U-shaped portions of the front end portions of the low friction member 29 and the high friction member 30 are folded back. It is sewn so as to cover the folded portion. If it does in this way, the sewing part 26a of the both ends of the upholstery material 26 will be reinforced. Alternatively, the front end portions of the low friction member 29 and the high friction member 30 may be simply sewn simultaneously to the sewn portions 26 a at both end portions of the upholstery material 26 without being folded back into a U shape.

なお、低摩擦部材２９と高摩擦部材３０の取付け方としては、上記縫着による以外に、側部フレーム１８と延長フレーム２３の外側面または張り材２６の両側部の内面に、接着剤等により直接固着してもよい。
また、図８に示すように、側部フレーム１８及び延長フレーム２３の外側面に、上下方向を向く凹溝３１を設け、この凹溝３１に、低摩擦部材２９と高摩擦部材３０の内側面に突設した上下方向を向く凸部３２を嵌合することにより、低摩擦部材２９と高摩擦部材３０を、側部フレーム１８と延長フレーム２３の外側面に着脱可能に取り付けてもよい。 The low friction member 29 and the high friction member 30 may be attached to the outer surface of the side frame 18 and the extension frame 23 or the inner surface of both sides of the upholstery material 26 with an adhesive or the like, in addition to the above-described sewing. It may be fixed directly.
Further, as shown in FIG. 8, on the outer side surfaces of the side frame 18 and the extension frame 23, a concave groove 31 facing in the vertical direction is provided, and the inner surfaces of the low friction member 29 and the high friction member 30 are provided in the concave groove 31. The low-friction member 29 and the high-friction member 30 may be detachably attached to the outer side surfaces of the side frame 18 and the extension frame 23 by fitting the projecting portion 32 that protrudes upward and downward.

さらに、図９に示すように、弾性変形可能な低摩擦部材２９と高摩擦部材３０を、側部フレーム１８と延長フレーム２３の外側面に、着脱自在に外嵌してもよく、このようにすると、側部フレーム１８と延長フレーム２３に、図８のような凹溝３１を設ける必要はなくなる。
なお、低摩擦部材２９と高摩擦部材３０は、側部フレーム１８と延長フレーム２３の外側面にコーティング等により形成した皮膜とすることもある。 Further, as shown in FIG. 9, the elastically deformable low friction member 29 and high friction member 30 may be detachably fitted on the outer side surfaces of the side frame 18 and the extension frame 23, as described above. Then, it is not necessary to provide the side groove 18 and the extension frame 23 with the concave groove 31 as shown in FIG.
The low friction member 29 and the high friction member 30 may be a film formed on the outer surfaces of the side frame 18 and the extension frame 23 by coating or the like.

上記のような構成とした背凭れ９において、座者が背凭れ９に凭れ掛けると、図４の２点鎖線に示すように、張り材２６の前面部２８ａが伸長しながら後方に撓むのに伴い、張り材２６の後面部２８ｂが引っ張られて伸長することにより、その両側部が、矢印のように若干前面部２８ａ側に回り込み、前面部８ａの後方への撓み量が増大する。この際、張り材２６の両側部の内面に取付けられた低摩擦部材２９が、側部フレーム１８における下部を除く外側面と、延長フレーム２３の外側面とに接触しているので、それらの接触部の摺動抵抗が小さくなる。   In the backrest 9 configured as described above, when a seated person leans on the backrest 9, the front portion 28a of the upholstery material 26 bends backward while extending as shown by a two-dot chain line in FIG. Along with this, the rear surface portion 28b of the upholstery material 26 is pulled and extended, so that both side portions slightly turn to the front surface portion 28a side as indicated by arrows, and the amount of bending of the front surface portion 8a to the rear increases. At this time, the low-friction members 29 attached to the inner surfaces of both side portions of the upholstery material 26 are in contact with the outer surface of the side frame 18 except for the lower portion and the outer surface of the extension frame 23. The sliding resistance of the part becomes small.

その結果、張り材２６における下部を除いた上方の両側部が、前面側に円滑に回り込むことにより、座者の背中と頭部を支持する張り材２６の前面部２８ａを、背中や頭部にフィットするように、後方に効果的に撓ませることが可能となり、背中や頭部が柔軟性をもって快適に支持される。
また、張り材２６の両側部が前面部２８ａ側に回り込む際に、不快な摺動音を発するのを防止することができる。
さらに、張り材２６は、その両側部内面に固定した低摩擦部材２９を介して、側部フレーム１８に対して摺動するので、張り材２６の両側部が摩耗するのが抑えられ、その張り替え時期が延びて、コストが削減される。 As a result, the upper side portions excluding the lower portion of the upholstery material 26 smoothly wrap around the front side, so that the front side portion 28a of the upholstery material 26 that supports the back and the head of the seated person is placed on the back and the head. It is possible to bend backward effectively to fit, and the back and head are supported comfortably with flexibility.
Further, it is possible to prevent an unpleasant sliding sound from being generated when both side portions of the upholstery material 26 are turned to the front surface portion 28a side.
Further, since the upholstery material 26 slides with respect to the side frame 18 via the low friction members 29 fixed to the inner surfaces of the both side portions, it is possible to suppress wear of the both side portions of the upholstery material 26 and to change the upholstery. Time is extended and costs are reduced.

一方、座者の腰部付近を支持する張り材２６の両側部内面、すなわち、左右の側部フレーム１８の下部外側面に接触する部分の張り材２６の内面には、高摩擦部材３０が取り付けられているので、側部フレーム１８と張り材２６の下部両側部との摺動抵抗が大となる。
その結果、側部フレーム１８の下部が前方に円弧状に湾曲していても、張り材２６の両側部の下部が、ずり上がることはなく、張り材２６の下部が弛んだり、皺が生じたりするのが防止される。
また、張り材２６の下部両側部が、背フレーム２２の前面側に回り込むのが防止または抑制されるので、張り材２６の前面部２８ａの下部、すなわち、座者の腰部付近を支持する部分のテンションが確保され、過度に後方に撓むことがなくなる。これにより、ランバーサポート効果が発揮され、座者の腰部が快適に支持されるので、座り心地が向上する。
なお、図８及び図９に示す実施形態においては、側部フレーム１８に取付けた低摩擦部材２９と高摩擦部材３０に対し、張り材２６の両側部が摺動することにより、張り材２６と側部フレーム１８との摺動抵抗が、小または大となり、上記と同様の作用効果が得られる。 On the other hand, the high friction member 30 is attached to the inner surfaces of both sides of the upholstery material 26 that supports the vicinity of the waist of the seated person, that is, the inner surface of the upholstery material 26 that is in contact with the lower outer surface of the left and right side frames 18. Therefore, the sliding resistance between the side frame 18 and the lower side portions of the upholstery material 26 is increased.
As a result, even if the lower portion of the side frame 18 is curved forward in an arc shape, the lower portions of both side portions of the upholstery material 26 do not slide up, and the lower portion of the upholstery material 26 may be loosened or wrinkled. Is prevented.
Further, since both lower side portions of the upholstery material 26 are prevented or suppressed from turning around to the front side of the back frame 22, the lower portion of the front surface portion 28a of the upholstery material 26, that is, a portion that supports the vicinity of the waist of the seated person. Tension is secured and it will not bend backwards excessively. Thereby, the lumbar support effect is exhibited, and the lumbar part of the occupant is comfortably supported, so that the sitting comfort is improved.
In the embodiment shown in FIGS. 8 and 9, the both sides of the upholstery material 26 slide with respect to the low friction member 29 and the high friction member 30 attached to the side frame 18. The sliding resistance with the side frame 18 becomes small or large, and the same effect as described above can be obtained.

本発明は、上記実施形態のみに限定されるものではなく、幾多の変形した態様での実施が可能である。
例えば、上記実施形態では、張り材２６における下部を除く上方の両側部内面に、低摩擦部材２９を設けているが、この低摩擦部材２９を省略し、下部の高摩擦部材３０のみとすることもある。 The present invention is not limited to the above-described embodiment, and can be implemented in various modified forms.
For example, in the above-described embodiment, the low friction member 29 is provided on the inner surfaces of the upper side portions except for the lower portion of the upholstery material 26. However, the low friction member 29 is omitted and only the lower high friction member 30 is provided. There is also.

また、上記実施形態では、高摩擦部材３０を、張り材２６の両側部の内面に設けた態様と、側部フレーム１８の外側面に設けた態様を例示したが、側部フレーム１８の外側面と、張り材２６の両側部内面との両方に高摩擦部材３０を設け、高摩擦部材２９同士を接触させて、摺動抵抗を大としうるようにすることもある。   Moreover, in the said embodiment, although the aspect provided with the high friction member 30 in the inner surface of the both sides of the upholstery material 26 and the aspect provided in the outer side surface of the side part frame 18 were illustrated, the outer side surface of the side part frame 18 was illustrated. In addition, the high friction member 30 may be provided on both the inner surfaces of both sides of the upholstery material 26, and the high friction members 29 may be brought into contact with each other to increase the sliding resistance.

本発明は、座５が上下に傾動しない一般的な椅子の背凭れにも適用しうることは、勿論である。   It goes without saying that the present invention can also be applied to a backrest of a general chair in which the seat 5 does not tilt up and down.

１ ベース
２ 脚柱
３ 支基
４ 下部構成体
５ 座
６ 基軸
７ 肘掛け
７ａ 背凭れ枢支部
７ｂ 肘当て部
８ 湾曲面
９ 背凭れ
１０ 前向側片
１１ 支軸
１２ 凹曲面
１３ 第１の付勢手段
１４ 第２の付勢手段
１５ ゴムトーションユニット
１６ 第１リンク
１７ 第２リンク
１８ 側部フレーム
１９ 上部フレーム
２０ 下部フレーム
２１ 中間フレーム
２２ 背フレーム
２３ 延長フレーム
２４ 頂部フレーム
２５ ヘッドレストフレーム
２６ 張り材
２６ａ縫着部
２７ ヘッドレスト覆い部
２８ 背凭れ覆い部
２８ａ前面部
２８ｂ後面部
２９ 低摩擦部材
３０ 高摩擦部材
３１ 凹溝
Ｓ 垂直線
DESCRIPTION OF SYMBOLS 1 Base 2 Pillar 3 Support base 4 Lower structure 5 Seat 6 Base axis 7 Armrest 7a Backrest pivot support part 7b Elbow rest part 8 Curved surface 9 Backrest 10 Forward side piece 11 Support axis 12 Concave surface 13 First bias Means 14 Second urging means 15 Rubber torsion unit 16 First link 17 Second link 18 Side frame 19 Upper frame 20 Lower frame 21 Intermediate frame 22 Back frame 23 Extension frame 24 Top frame 25 Headrest frame 26 Tightening material 26a Wearing portion 27 Headrest covering portion 28 Backrest covering portion 28a Front portion 28b Rear surface portion 29 Low friction member 30 High friction member 31 Concave groove S Vertical line

Claims (3)

上下方向を向く左右１対の側部フレームを有する背フレームに、袋状の張り材を被嵌して張設してなる椅子の背凭れにおいて、
前記張り材における座者の腰部付近を支持する下部側の両側部内面と、その部分に接触する前記左右の側部フレームの外側面との少なくともいずれか一方に、張り材と側部フレームとの接触部の摺動抵抗を大としうる高摩擦部材を設け、かつこの高摩擦部材の一側端部を、前記張り材を袋状に形成するべく、その両側端部を内方に折り重ねて縫着した縫着部に、この縫着部を覆うようにして固定したことを特徴とする椅子の背凭れ。 In a backrest of a chair formed by fitting a bag-like tension material on a back frame having a pair of left and right side frames facing in the vertical direction,
At least one of the inner surfaces of both sides on the lower side supporting the vicinity of the lumbar portion of the occupant in the upholstery material and the outer side surfaces of the left and right side frame in contact with the portion, the upholstery material and the side frame A high friction member capable of increasing the sliding resistance of the contact portion is provided, and one end portion of the high friction member is folded inward to form the upholstery material in a bag shape. A backrest of a chair characterized by being fixed to a sewn sewn part so as to cover the sewn part . 高摩擦部材の一側端部を、張り材の縫着部に、縫着により固定してなる請求項１記載の椅子の背凭れ。 The backrest of the chair according to claim 1 , wherein one side end of the high friction member is fixed to a sewn portion of the upholstery material by sewing. 高摩擦部材を、ポリウレタン樹脂またはその発泡体、ウレタン系エラストマー、ゴムのいずれかにより形成してなる請求項１または２記載の椅子の背凭れ。   The backrest of the chair according to claim 1 or 2, wherein the high friction member is formed of any one of polyurethane resin or foam thereof, urethane elastomer, and rubber.
JP2009240146A 2009-10-19 2009-10-19 Chair back Active JP5606717B2 (en)

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JP2009240146A JP5606717B2 (en) 2009-10-19 2009-10-19 Chair back
KR1020127009933A KR20120098633A (en) 2009-10-19 2010-10-19 Backrest for chair
EP10824921.0A EP2491821A4 (en) 2009-10-19 2010-10-19 Backrest for chair
CA2778163A CA2778163A1 (en) 2009-10-19 2010-10-19 Backrest for chair
US13/503,001 US20120212027A1 (en) 2009-10-19 2010-10-19 Backrest for chair
PCT/JP2010/068341 WO2011049072A1 (en) 2009-10-19 2010-10-19 Backrest for chair
CN2010800469546A CN102573571A (en) 2009-10-19 2010-10-19 Backrest for chair

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US20120212027A1 (en) 2012-08-23
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CN102573571A (en) 2012-07-11
CA2778163A1 (en) 2011-04-28

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