JP2708365B2 - Chair shell - Google Patents
Chair shellInfo
- Publication number
- JP2708365B2 JP2708365B2 JP6066854A JP6685494A JP2708365B2 JP 2708365 B2 JP2708365 B2 JP 2708365B2 JP 6066854 A JP6066854 A JP 6066854A JP 6685494 A JP6685494 A JP 6685494A JP 2708365 B2 JP2708365 B2 JP 2708365B2
- Authority
- JP
- Japan
- Prior art keywords
- rib
- lower edge
- shell
- mounting
- chair shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、会議室等で使用される
いわゆるパイプ椅子の背もたれに適用されるシェルに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shell applied to the back of a so-called pipe chair used in a conference room or the like.
【０００２】[0002]
【従来の技術】従来、商談等を行う打合せ室等で使用さ
れる椅子として、脚と背支桿とが一体にされたパイプフ
レームに、座と背もたれとを組み付けたものが知られて
いる。この種の椅子の背もたれは、シェルに外装材を貼
設して形成されている。シェルは、通常、背支桿の上端
に固定されたブラケットに取り付けられるように、その
左右の側縁に取付部が形成され、使用時に全体にかかる
荷重を取付部に伝達すべく、それぞれの取付部から上中
央部に向かって放射状に複数のリブが形成されている。
このリブにより、シェルにかかった荷重は取付部に集中
され、シェルが変形して、その上半部分が後方に、かつ
下半部分が前方に迫り出すのを有効に防止している。2. Description of the Related Art Heretofore, as a chair used in a meeting room or the like for conducting business negotiations, there has been known a chair in which a seat and a backrest are assembled to a pipe frame in which a leg and a back support rod are integrated. The backrest of this type of chair is formed by attaching an exterior material to a shell. The shell is usually provided with attachment parts on the left and right side edges so that it can be attached to the bracket fixed to the upper end of the back support rod. A plurality of ribs are formed radially from the portion toward the upper center.
By the ribs, the load applied to the shell is concentrated on the mounting portion, and the shell is effectively prevented from being deformed so that the upper half thereof protrudes rearward and the lower half protrudes forward.
【０００３】[0003]
【発明が解決しようとする課題】上記の構造にあって
は、椅子のシェルとして必要な剛性は確保されるもの
の、しなやかさに欠ける傾向にある。すなわち、このよ
うなシェルは、使用者の身体を支持するのに十分な剛性
を備え、衝撃的な荷重に対して損傷しないように作製さ
れているものの、使用者が上半身を後方に捻ったりした
場合に、背もたれが堅いために上半身の変化にあわせて
撓むことがなく、上半身を背もたれ後方に伸ばす動作が
しにくいことがある。また、椅子を後方に移動したりす
る場合等に、背もたれ上半部分を掴むとリブが手に馴染
まず、ごつごつして持ちにくい印象を与えることがあ
る。本発明は、このような不具合を解消することを目的
としている。In the above-mentioned structure, although the rigidity required for the shell of the chair is ensured, it tends to lack flexibility. That is, while such shells are rigid enough to support the user's body and are made to be intact against shock loads, the user twists the upper body backwards. In this case, since the backrest is rigid, the backrest does not bend in accordance with the change of the upper body, and it may be difficult to extend the upper body backward. In addition, when moving the chair backward, for example, when the upper half of the backrest is grasped, the ribs do not conform to the hands and may give a rough and difficult impression. An object of the present invention is to solve such a problem.
【０００４】[0004]
【課題を解決するための手段】本発明は、このような目
的を達成するために、次のような手段を講じたものであ
る。すなわち、本願の請求項１に係る発明の椅子のシェ
ルは、上半部分が可撓性を有し、下半部分の両側縁に設
けられた左右一対の取付部を背支桿の上端に取り付けら
れるブラケットに止着する椅子のシェルであって、少な
くとも取付部間に形成される領域に前記取付部同士を連
結する剛性強化用の補強部材を設けてなり、補強部材
が、下縁に沿って設けられる下縁補強用リブと、該下縁
補強用リブの略中央部近傍に一方端を連結するとともに
他方端を対応する取付部の上方にそれぞれ位置させ、該
一方端から対応する取付部に接近する方向へ膨らむよう
に湾曲しつつ前記他方端にまで延びる左右一対の傾斜リ
ブとを、背面に突出させて設けたものであることを特徴
とする。In order to achieve the above object, the present invention takes the following measures. That is, the chair shell of the invention according to claim 1 of the present Application, the upper half portion has a flexibility, a pair of left and right mounting portions provided on both side edges of the lower half to the upper end of the back支桿a chair that secured to a bracket mounted shell, Ri Na provided a reinforcing member for rigidity reinforcement for connecting the mounting portions in the area to be formed at least between the attachment portion, the reinforcing member
A rib for reinforcing the lower edge provided along the lower edge;
Connect one end near the center of the reinforcing rib and
Position the other end above the corresponding mounting part,
Swell from one end in the direction approaching the corresponding mounting part
A pair of left and right inclined ribs extending to the other end while bending
Are provided so as to protrude from the rear surface .
【０００５】本願の請求項１に係る発明の椅子のシェル
は、上半部分が可撓性を有するのに対し、下半部分は複
数の補強部材により補強して剛性を高くし、補強部材を
身体に当る位置から遠ざける構成である。このような構
成において、上半部分から伝達された応力を分散させる
ためには、下縁補強用リブの略中央部の上縁側に膨出す
る半円弧状の応力分散用リブを有してなることが望まし
い。[0005] Chair shell of the present Application claims according to the first invention is, while the upper half portion has a flexible, high rigidity lower half is reinforced by a plurality of reinforcing members, the reinforcing member To
Ru configuration der which is kept away from the position corresponding to the body. In such a configuration, in order to disperse the stress transmitted from the upper half portion, the lower edge reinforcing rib has a semicircular arc-shaped stress distributing rib bulging to the upper edge side substantially at the center. It is desirable.
【０００６】また、構成を簡略化するために、本願の請
求項３に係る発明の椅子のシェルは、上半部分が可撓性
を有し、下半部部の両側縁に設けられた取付部を背支桿
の上端に取り付けられるブラケットに止着する椅子のシ
ェルであって、少なくとも取付部間に形成される領域に
前記取付部同士を連結する剛性強化用の補強部材を設け
てなり、補強部材が、取付部上縁同士を水平方向に連結
する横リブと、それぞれの取付部の上部分を中心として
他方の取付部方向と下縁方向とに放射状に延長される放
射状リブとを備えてなることを特徴とする。このような
本願のそれぞれの発明の椅子のシェルにおけるリブとし
ては、代表的には、断面コ字状のものが挙げられる。Further, in order to simplify the configuration, the contract
The upper shell of the chair shell of the invention according to claim 3 is flexible.
The mounting parts provided on both side edges of the lower half part are
Chair seat that attaches to a bracket attached to the
At least in the area formed between the mounting parts.
Providing a reinforcing member for strengthening rigidity connecting the mounting portions to each other
And the reinforcing member connects the upper edges of the mounting parts horizontally.
The horizontal ribs and the upper part of each mounting part
Radially extending in the direction of the other mounting part and in the direction of the lower edge
And a projection rib. like this
The rib in the shell of the chair of each invention of the present application typically has a U-shaped cross section.
【０００７】[0007]
【作用】このような構成のものであれば、一対の取付部
間に形成される領域に取付部同士を連結する補強部材が
設けてあるので、下半部分はその補強部材により剛性が
高められる。言い換えれば、上半部分は可撓性を有して
いるのに対し、下半部分は補強部材があるために上半部
分に比較して可撓性が小さくなっている。つまり、全体
を見た場合、上半部分が撓むことができるように構成さ
れているのに対し、下半部は補強部材によって撓みにく
く構成されている。しかも、補強部材は、下縁に沿って
設けられる下縁補強用リブと、該下縁補強用リブの略中
央部近傍に一方端を連結するとともに他方端を対応する
取付部の上方にそれぞれ位置させ、該一方端から対応す
る取付部に接近する方向へ膨らむように湾曲しつつ前記
他方端にまで延びる左右一対の傾斜リブとを、背面に突
出させて設けて、一対の取付部同士を連結しているた
め、荷重は取付部に伝達され、背支桿のブラケットによ
り受け止められることになる。それゆえ、通常の着座姿
勢でかかる荷重については補強部材により補強された下
半部分の剛性により十分に支持され、全体を変形させる
には至らない。With such a construction, since a reinforcing member for connecting the mounting portions is provided in a region formed between the pair of mounting portions, the rigidity of the lower half portion is enhanced by the reinforcing member. . In other words, the upper half has flexibility, whereas the lower half has a reinforcing member, and thus has less flexibility than the upper half. That is, when viewed as a whole, the upper half is configured to be able to bend, whereas the lower half is configured to be hardly bent by the reinforcing member. Moreover, the reinforcement member along the lower edge
A lower edge reinforcing rib provided, and substantially the middle of the lower edge reinforcing rib;
Connect one end near the center and correspond the other end
Position each one above the mounting part, and
While bending so as to expand in the direction approaching the mounting part
A pair of left and right inclined ribs extending to the other end
The load is transmitted to the mounting portion and is received by the bracket of the back support rod because the pair of mounting portions are connected to each other by being provided so as to protrude. Therefore, the load applied in the normal sitting posture is sufficiently supported by the rigidity of the lower half portion reinforced by the reinforcing member, and the entire body is not deformed.
【０００８】一方、使用者が通常の着座姿勢から後方に
向いてその姿勢を変更した場合には、使用者の荷重が一
方向に偏ることになるが、その荷重の偏りに応じて上半
部分がその方向に撓み、補強部材の設けられた下半部分
は撓むことがないので、取付部を結んだ線分を回転の軸
として、上半部分が後方に移動し、かつ下半部分が前方
に移動するように回転することがなくなる。しかも、上
半部分が撓んでいるので、使用者は後方に向いた姿勢に
好ましい状態で支持され、違和感なく後向きの着座姿勢
を保持することができる。On the other hand, if the user changes his or her posture from the normal sitting posture to the rear, the load of the user will be biased in one direction. Is bent in that direction, and the lower half provided with the reinforcing member does not bend, so the upper half moves rearward with the line connecting the mounting portions as the axis of rotation, and the lower half moves It does not rotate to move forward. In addition, since the upper half portion is bent, the user is supported in a preferred state in a rearward facing posture, and can maintain a rearward sitting posture without feeling uncomfortable.
【０００９】[0009]
【実施例】以下、本発明の一実施例を、図１〜５を参照
して説明する。図１に示す椅子１００は、スチールパイ
プ製の前脚１と、上端にブラケットＢが固定された背支
桿２を一体に形成した後脚３と、前脚１と後脚３との連
結パイプ（図示しない）と、連結パイプ上に取り付けら
れる座４と、座４より上に位置する背支桿２の上端に取
り付けられるシェル５を芯として形成される背もたれ６
とからなる。シェル５を除く他の構成要素については、
この分野で広く知られているものを使用することができ
るので、説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. A chair 100 shown in FIG. 1 includes a front leg 1 made of a steel pipe, a rear leg 3 integrally formed with a back support rod 2 having a bracket B fixed to an upper end, and a connecting pipe (shown in FIG. 1) between the front leg 1 and the rear leg 3. No), a backrest 6 formed around a seat 4 attached to the connecting pipe and a shell 5 attached to the upper end of the back support rod 2 located above the seat 4 as a core.
Consists of For other components except the shell 5,
Since those widely known in this field can be used, the description is omitted.
【００１０】シェル５は、例えば硬質の合成樹脂製で、
概略的には半円板状をしており、上半部分ＵＡは素材の
材質を生かして可撓性のあるように構成してあり、下半
部分ＬＡには後述する補強部材ＳＭが設けられて、上半
部分ＵＡに比較して剛性が高めてある。この実施例で
は、上半部分ＵＡには全くリブ構造を設けていないが、
可撓性を有した状態に例えば縦方向にリブを設けるもの
であってもよく、その場合に、上半部分ＵＡの剛性が下
半部分ＬＡより高くなってはならない。このような上半
部分ＵＡと下半部分ＬＡとの上縁５ｄと下縁５ａとに沿
って、それぞれ上縁補強用リブ５ｆと下縁補強用リブ５
ｅとが設けられており、その下半部分ＬＡの下縁５ａに
近い左右の側縁５ｂには、取付部５ｃが形成される。下
縁補強用リブ５ｅの左右方向の略中央部の上側には、半
円弧状の応力分散用リブ５ｇが設けられている。さら
に、この応力分散用リブ５ｇと上縁補強用リブ５ｆと下
縁補強用リブ５ｅとを連結して、左右一対の傾斜リブ５
ｈが応力分散用リブ５ｇの左右上方に設けられている。
下縁補強用リブ５ｅと応力分散用リブ５ｇと傾斜リブ５
ｈとにより補強部材ＳＭが構成される。そして、これら
の各リブ５ｅ、５ｆ、５ｇ、５ｈは、シェル５の背面に
突条を形成し、かつ前面には凹溝５ｉを形成しており、
したがって断面形状はコ字形となっている。このような
リブ形状は、平板の上に板状のリブを一体成形する場合
に比べて、ひけが発生せず、リブの厚みを均一にできる
ことから、リブ全体を同じ剛性を有する状態に成形する
ことが容易になる。The shell 5 is made of, for example, a hard synthetic resin.
Schematically, it has a semi-disc shape, the upper half UA is configured to be flexible by utilizing the material of the material, and the lower half LA is provided with a reinforcing member SM described later. Therefore, the rigidity is increased as compared with the upper half UA. In this embodiment, the upper half UA has no rib structure at all,
For example, a rib may be provided in the vertical direction in a state of flexibility, in which case the rigidity of the upper half UA must not be higher than that of the lower half LA. Along the upper edge 5d and the lower edge 5a of the upper half UA and the lower half LA, an upper edge reinforcing rib 5f and a lower edge reinforcing rib 5 are respectively provided.
The mounting portion 5c is formed on the left and right side edges 5b near the lower edge 5a of the lower half portion LA. Above a substantially central portion of the lower edge reinforcing rib 5e in the left-right direction, a semicircular stress-dispersing rib 5g is provided. Further, the stress dispersing ribs 5g, the upper edge reinforcing ribs 5f, and the lower edge reinforcing ribs 5e are connected to form a pair of left and right inclined ribs 5.
h is provided on the left and right of the stress distributing rib 5g.
Lower edge reinforcing rib 5e, stress dispersing rib 5g, and inclined rib 5
and h constitute a reinforcing member SM. Each of the ribs 5e, 5f, 5g, and 5h forms a ridge on the back surface of the shell 5 and a concave groove 5i on the front surface.
Therefore, the cross-sectional shape is U-shaped. Such a rib shape does not cause sink marks as compared with a case where a plate-like rib is integrally formed on a flat plate, and the thickness of the rib can be made uniform, so that the entire rib is formed to have the same rigidity. It becomes easier.
【００１１】このような構成のシェル５に、クッション
と表装材とが一体にして形成された外装材７を貼設する
ことによって、椅子１００の背もたれ６が形成される。
外装材７は、その下端部に板部材７ａを備え、その板部
材７ａの両端にそれぞれ２本ずつ取り付けられた弾性変
形可能な取付ピン７ｂを、後述する取付部５ｃの取付孔
５ｊに嵌合して、シェル５の外面に覆うようにして取り
付けられる。The backrest 6 of the chair 100 is formed by attaching an exterior material 7 in which a cushion and a surface material are integrally formed on the shell 5 having such a configuration.
The exterior member 7 has a plate member 7a at a lower end thereof, and two elastically deformable mounting pins 7b respectively mounted on both ends of the plate member 7a are fitted into mounting holes 5j of a mounting portion 5c described later. Then, it is attached so as to cover the outer surface of the shell 5.
【００１２】取付部５ｃは、シェル５の下半部分ＬＡの
両側縁に設けられるもので、他の部分より厚みを大きく
した略長方形状のブラケット連結部分５ｋと、そのブラ
ケット連結部分５ｋを取り囲むようにして形成された補
強リブ５ｌとからなり、変形不可能な状態まで剛性を高
めてある。ブラケット連結部分５ｋの厚みは他の部分の
略２倍程度であり、その厚みを利用して、表面に略直角
な方向にナットをインサート成形したブラケット取付孔
５ｍと、外装材７を取り付ける取付孔５ｊとが穿設され
ている。補強リブ５ｌは、ブラケットＢがブラケット連
結部分５ｋに密着しやすいように、ブラケット連結部分
５ｋの外側縁部分にはなく、その上辺と内側の側辺と沿
って連続して成形してある。The mounting portions 5c are provided on both side edges of the lower half portion LA of the shell 5, and have a substantially rectangular bracket connecting portion 5k thicker than the other portions, and surround the bracket connecting portion 5k. The rigidity is increased to a state where it cannot be deformed. The thickness of the bracket connecting portion 5k is about twice as large as the other portions, and a bracket mounting hole 5m in which a nut is insert-molded in a direction substantially perpendicular to the surface using the thickness, and a mounting hole for mounting the exterior material 7 are used. 5j. The reinforcing rib 51 is not formed on the outer edge portion of the bracket connecting portion 5k but is formed continuously along the upper side and the inner side side thereof so that the bracket B can easily adhere to the bracket connecting portion 5k.
【００１３】この左右の取付部５ｃを連結して、下縁５
ａ及び側縁５ｂを含む上縁５ｄに下縁補強用リブ５ｅ及
び上縁補強用リブ５ｆがそれぞれ設けられている。下縁
補強用リブ５ｅは、右の取付部５ｃのブラケット連結部
分５ｋの下端位置からシェル５の下縁５ａに沿って左の
取付部５ｃの下端位置まで形成されている。この実施例
では、下縁補強用リブ５ｅは上下２段構成で、実質的に
シェル５の下縁５ａを構成する下側に位置するリブＲｌ
は、他のリブと同形であり、そのリブＲｌを補強するよ
うにしてその上側に、若干高さの低いリブＲｕが添設さ
れている。また、上縁補強用リブ５ｆは、実質的にこの
シェル５の上縁５ｄ及び側縁５ｂを形成しており、その
両端が取付部５ｃの補強リブ５ｌに連続している。した
がって、シェル５の縁部分は、上下左右ともリブにより
補強された形になっており、取付部５ｃの外側側縁のみ
リブが形成されていないが、取付部５ｃのブラケット連
結部分５ｋは厚みが厚いので、必要な剛性は保持され
る。The left and right mounting portions 5c are connected to each other to form a lower edge 5
The lower edge reinforcing rib 5e and the upper edge reinforcing rib 5f are provided on the upper edge 5d including the side edge 5a and the side edge 5b, respectively. The lower edge reinforcing rib 5e is formed from the lower end position of the bracket connecting portion 5k of the right mounting portion 5c to the lower end position of the left mounting portion 5c along the lower edge 5a of the shell 5. In this embodiment, the lower edge reinforcing ribs 5e have a two-stage configuration in the upper and lower parts, and the ribs R1 substantially located on the lower side constituting the lower edge 5a of the shell 5 are provided.
Has the same shape as the other ribs, and a rib Ru with a slightly lower height is additionally provided on the upper side so as to reinforce the rib Rl. The upper edge reinforcing rib 5f substantially forms the upper edge 5d and the side edge 5b of the shell 5, and both ends thereof are continuous with the reinforcing rib 51 of the mounting portion 5c. Therefore, the edge portion of the shell 5 is reinforced by ribs in the upper, lower, left, and right directions, and the rib is not formed only on the outer side edge of the mounting portion 5c, but the thickness of the bracket connecting portion 5k of the mounting portion 5c is small. The required rigidity is retained because of the thickness.
【００１４】応力分散用リブ５ｇは、下縁補強用リブ５
ｅの上側に形成されるもので、下縁補強用リブ５ｅの長
手方向の略中央を中心とする円の上側の円弧上に成形さ
れている。つまり、下縁補強用リブ５ｅの略中央から等
距離離れた下縁補強用リブ５ｅの２点を結合するリブで
あり、下縁補強用リブ５ｅとの結合点には傾斜リブ５ｈ
の下方端５ｐが結合している。傾斜リブ５ｈは、外側に
膨らんでいる円弧形、すなわち下縁補強用リブ５ｅの略
中央部近傍に一方端たる下方端５ｐを連結するとともに
他方端たる上方端５ｑを対応する取付部５ｃの上方にそ
れぞれ位置させ、その下方端５ｐから対応する取付部５
ｃに接近する方向へ膨らむように湾曲しつつ上方端５ｑ
にまで延びるものであり、取付部５ｃに接近した状態か
らその上方に延長されて、取付部５ｃの略真上位置でそ
の上方端５ｑが上縁補強用リブ５ｆと結合する。つま
り、傾斜リブ５ｈは応力分散用リブ５ｇの下端に斜め上
方から結合しており、この結合点に伝達された応力は、
水平方向の分力が応力分散用リブ５ｇにより相殺され、
残る垂直方向の分力が下縁補強用リブ５ｅに伝達される
構造を形成している。The stress-dispersing rib 5g is a lower edge reinforcing rib 5g.
The upper edge of the lower edge reinforcing rib 5e is formed on an arc above the circle centered substantially at the center in the longitudinal direction of the lower edge reinforcing rib 5e. That is, it is a rib connecting two points of the lower edge reinforcing rib 5e equidistant from the approximate center of the lower edge reinforcing rib 5e.
Is connected to the lower end 5p. The inclined rib 5h has an arc shape bulging outward, that is , substantially the same as the lower edge reinforcing rib 5e.
While connecting the lower end 5p which is one end near the center,
Place the upper end 5q, which is the other end, above the corresponding mounting portion 5c.
And the corresponding mounting portion 5 from the lower end 5p.
upper end 5q while bulging in the direction approaching c
Is intended to extend to the, from the state of being close to the mounting portion 5c is extended thereabove, the upper end 5q is bonded to the upper edge reinforcing rib 5f at substantially right above the position of the mounting portion 5c. That is, the inclined rib 5h is connected to the lower end of the stress distributing rib 5g from obliquely above, and the stress transmitted to this connection point is:
The horizontal component is offset by the stress-dispersing rib 5g,
A structure is formed in which the remaining vertical component force is transmitted to the lower edge reinforcing rib 5e.
【００１５】このような構成において、前脚１と後脚３
とが連結され、できあがったフレームに座４が取り付け
られる。次に、後脚３上方に一体に取り付けられた背支
桿２の上端に固定してあるブラケットＢの前面にシェル
５をあてがい、ブラケットＢ背面からボルトをブラケッ
ト取付孔５ｍに挿入し、締結する。この後、シェル５に
外装材７を取り付けることにより、椅子１００の組立が
完了する。In such a configuration, the front leg 1 and the rear leg 3
And the seat 4 is attached to the completed frame. Next, the shell 5 is applied to the front surface of the bracket B fixed to the upper end of the back support rod 2 integrally attached above the rear leg 3, and a bolt is inserted into the bracket mounting hole 5m from the rear surface of the bracket B and tightened. . Thereafter, the exterior material 7 is attached to the shell 5 to complete the assembly of the chair 100.
【００１６】通常の着席姿勢において、この椅子１００
のシェル５に後方に向かう荷重がかかった場合、シェル
５の上半部分ＵＡの中央部５ｎは、わずかながら後方に
撓む。この時、荷重により中央部５ｎに発生する応力
は、中央部５ｎからシェル５の周縁方向に伝播し、上縁
補強用リブ５ｆ及び傾斜リブ５ｈに達する。上縁補強用
リブ５ｆに達した応力は、上縁補強用リブ５ｆ及び取付
部５ｃの補強リブ５ｌを介して下縁補強用リブ５ｅに吸
収される。また、傾斜リブ５ｈに達した応力は、傾斜リ
ブ５ｈによりした縁補強用リブに伝達される。この場
合、中央部５ｎがその中央方向に向かって撓むことによ
る応力の内、水平方向の応力は応力分散用リブ５ｇによ
り吸収され、垂直方向の応力は下縁補強用リブ５ｅによ
り左右の取付部５ｃに伝達されて吸収される。したがっ
て、中央部５ｎにリブ構造がなくともシェル５全体の剛
性が不足することはなく、シェル５の下半部分ＬＡ、特
にはその下縁５ａが座４の方向に迫り出すような変形は
確実に抑制され、背もたれ６が若干撓んだ状態で十分に
着座姿勢を保持するものである。In a normal sitting posture, the chair 100
When a rearward load is applied to the shell 5, the central portion 5n of the upper half UA of the shell 5 slightly bends rearward. At this time, the stress generated in the central portion 5n by the load propagates from the central portion 5n in the peripheral direction of the shell 5, and reaches the upper edge reinforcing rib 5f and the inclined rib 5h. The stress reaching the upper edge reinforcing rib 5f is absorbed by the lower edge reinforcing rib 5e via the upper edge reinforcing rib 5f and the reinforcing rib 51 of the mounting portion 5c. The stress that has reached the inclined rib 5h is transmitted to the edge reinforcing rib formed by the inclined rib 5h. In this case, of the stress caused by the central portion 5n flexing toward the central direction, the horizontal stress is absorbed by the stress distributing rib 5g, and the vertical stress is fixed by the lower edge reinforcing rib 5e. It is transmitted to the part 5c and absorbed. Therefore, even if there is no rib structure in the central portion 5n, the rigidity of the entire shell 5 does not become insufficient, and deformation in which the lower half portion LA of the shell 5, especially the lower edge 5a thereof protrudes in the direction of the seat 4 is ensured. And the seat back 6 is sufficiently held in a seated posture in a state where the backrest 6 is slightly bent.
【００１７】一方、例えば、通常の着席姿勢の状態から
後方右側に上半身を反転させた場合、シェル５にかかる
荷重は反転している方向つまり右反面に偏る。そのため
に、発生した応力が右側に偏り、左側の傾斜リブ５ｈに
伝播する応力が少なくなる分左右の応力が不均衡にな
り、右側の撓み方が左側に比べて若干多くなる。つま
り、シェル５が上半身の移動に追従して変形するもの
で、その分反転している上半身にシェル５が与える力が
少なくなり、姿勢の維持が容易になる。On the other hand, for example, when the upper body is turned to the rear right side from the normal sitting posture, the load applied to the shell 5 is biased in the reversing direction, that is, rightward. For this reason, the generated stress is biased rightward, and the stress transmitted to the left inclined rib 5h is reduced, so that the left and right stresses become unbalanced, and the right side is slightly bent more than the left side. In other words, the shell 5 is deformed following the movement of the upper body, and the force exerted by the shell 5 on the inverted upper body is correspondingly reduced, and the posture is easily maintained.
【００１８】このように、通常の着座姿勢においては、
上半身を保持するのに十分な剛性を備える一方、後ろに
振り向いた姿勢においては、上半身の動きに追従するの
で、着席した状態での使用勝手及び座り心地が向上す
る。また、中央部５ｎは、リブのない平坦な板状である
ので、例えば椅子１００を後方に下げる場合等にこの部
分を掴んでも、手に馴染まない凹凸がないために、外観
から受ける印象に違和感を与えないものとすることがで
きる。As described above, in a normal sitting posture,
While having sufficient rigidity to hold the upper body, it follows the movement of the upper body in a posture turned backward, thereby improving the usability and sitting comfort in a seated state. Further, since the central portion 5n is a flat plate shape without ribs, even when the chair 100 is gripped when the chair 100 is lowered backward, for example, there is no irregularity that does not fit into the hand, so that the impression received from the exterior is uncomfortable. Is not given.
【００１９】なお、本発明は以上説明した実施例に限定
されるものではない。例えば、上記実施例における変形
例としては、下縁補強用リブ５ｅを、他のリブ５ｆ、５
ｌ、５ｇ、５ｈより剛性の高い１本で構成するものであ
ってもよい。また、位置的には、シェル５の下縁５ａ近
傍であればよく、例えば取付部５ｃの縦方向の略中央同
士を連結する位置であってもよい。The present invention is not limited to the embodiment described above. For example, as a modification of the above embodiment, the lower edge reinforcing rib 5e is
It may be composed of one piece having higher rigidity than 1, 5g, and 5h. The position may be in the vicinity of the lower edge 5a of the shell 5, and may be, for example, a position connecting substantially the centers of the mounting portions 5c in the vertical direction.
【００２０】他の実施例としては、図６に示すように、
取付部５ｃの補強リブ５ｌを取付部５ｃ間に水平方向に
設けてなる複数の横リブ５ｒにより、補強部材ＳＭを構
成するものであってもよい。すなわち、この実施例で
は、横リブ５ｒは、左右の補強リブ５ｌの上段同士、中
段同士及び下段同士を連結してシェル５の背面に突出し
て設けられるもので、荷重をそれぞれで左右の取付部５
ｃに伝達して、下半部分ＬＡの剛性を上半部分ＵＡより
高めている。As another embodiment, as shown in FIG.
The reinforcing member SM may be constituted by a plurality of horizontal ribs 5r formed by horizontally providing the reinforcing ribs 51 of the mounting portion 5c between the mounting portions 5c. That is, in this embodiment, the horizontal ribs 5r are provided so as to protrude from the rear surface of the shell 5 by connecting the upper tier, the middle tier, and the lower tier of the left and right reinforcing ribs 51 with each other. 5
c, the rigidity of the lower half LA is higher than that of the upper half UA.
【００２１】また、さらに他の実施例としては、図７に
示すように、取付部５ｃ上縁同士を水平方向に連結する
横リブ５ｒと、それぞれの取付部５ｃの上部分を中心と
して他方の取付部方向と下縁方向とに放射状に延長され
る放射状リブ５ｓとにより補強部材ＳＭを構成するもの
であってもよい。この実施例では、上記他の実施例とは
異なり、取付部５ｃの対向する角部からそれぞれの取付
部５ｃに向かって放射状にリブが形成されている。放射
状リブ５ｓは、横リブ５ｒより下の部分にだけ設けられ
るもので、上半部分ＵＡに延出するものではない。した
がって、シェル５にかかった荷重は、それぞれのリブ５
ｓ、５ｒを介して左右の取付部５ｃに伝達され、上記そ
れぞの実施例同様に、上半部分と下半部分とに剛性の違
いを生じせしめることができる。Further, as another embodiment, as shown in FIG. 7, horizontal ribs 5r connecting the upper edges of the mounting portions 5c in the horizontal direction, and the other side centering on the upper portions of the respective mounting portions 5c. The reinforcing member SM may be constituted by radial ribs 5s extending radially in the direction of the mounting portion and the lower edge. In this embodiment, unlike the other embodiments described above, ribs are formed radially from the opposing corners of the mounting portion 5c toward the respective mounting portions 5c. The radial rib 5s is provided only in a portion below the horizontal rib 5r, and does not extend to the upper half UA. Therefore, the load on the shell 5 is
s , 5r, and is transmitted to the left and right mounting portions 5c, and a difference in rigidity can be caused between the upper half portion and the lower half portion as in the above-described respective embodiments.
【００２２】このように、上記それぞれの実施例におい
ては、上半部分ＵＡにはリブ等の補強部材は全く設けら
れてないが、シェル５が強度不足となることはなく、下
半部分ＬＡとの剛性の相違により、むしろ適度な柔軟度
のために使い勝手を向上させるものとなる。なお、シェ
ル５の素材によっては、上半部分ＵＡが撓みすぎる可能
性もあるが、そのような場合には下半部分ＬＡに形成す
るよりも寸法の小さいリブを設けて、最少限の強度を確
保するようにしてもよい。その他、各部の構成は図示例
に限定されるものではなく、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。As described above, in each of the above embodiments, the upper half UA is not provided with any reinforcing member such as a rib, but the strength of the shell 5 does not become insufficient, and the lower half LA and the lower half LA have the same strength. Due to the difference in rigidity, the usability is improved due to a moderate degree of flexibility. Depending on the material of the shell 5, the upper half UA may be excessively bent. In such a case, a rib having a smaller size than that formed on the lower half LA is provided to minimize the strength. You may secure it. In addition, the configuration of each unit is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.
【００２３】[0023]
【発明の効果】本発明は、以上に詳述したように、上半
部分に可撓性を有した構成にもかかわらず、下半部分の
取付部を連結する位置に補強部材を、下縁に沿って設け
られる下縁補強用リブと、該下縁補強用リブの略中央部
近傍に一方端を連結するとともに他方端を対応する取付
部の上方にそれぞれ位置させ、該一方端から対応する取
付部に接近する方向へ膨らむように湾曲しつつ前記他方
端にまで延びる左右一対の傾斜リブとで構成して、背面
に突出させて設けているので、しなやかさを有した状態
で着座姿勢を保持するのに十分な剛性を発揮させること
ができ、また、通常の着座姿勢からの上半身の変化に追
従して変形するので、座り心地を向上させることができ
る。According to the present invention, as described in detail above, the reinforcing member is provided at the position for connecting the mounting portion of the lower half portion with the lower edge despite the configuration in which the upper half portion has flexibility. Provided along
Rib for reinforcing the lower edge and a substantially central portion of the rib for reinforcing the lower edge
Connect one end to the vicinity and attach the other end correspondingly
Above each section, and the corresponding
The other side while being curved so as to expand in a direction approaching the attachment portion
It consists of a pair of left and right inclined ribs extending to the end, and the back
Because it is provided so as to protrude, it can exhibit sufficient rigidity to maintain a sitting posture with suppleness, and also deforms following changes in the upper body from a normal sitting posture Therefore, the sitting comfort can be improved.
【図１】本発明の一実施例の椅子を分解して示す斜視
図。FIG. 1 is an exploded perspective view showing a chair according to an embodiment of the present invention.
【図２】同実施例のシェルの背面図。FIG. 2 is a rear view of the shell of the embodiment.
【図３】同実施例のシェルの前面から見た場合の斜視
図。FIG. 3 is a perspective view of the shell of the embodiment when viewed from the front.
【図４】図２のＡ−Ａ線に沿った部分端面図。FIG. 4 is a partial end view taken along line AA of FIG. 2;
【図５】図２のＢ−Ｂ線に沿った端面図。FIG. 5 is an end view along the line BB in FIG. 2;
【図６】本発明の他の実施例のシェルの背面図。FIG. 6 is a rear view of a shell according to another embodiment of the present invention.
【図７】本発明のさらに他の実施例のシェルの背面図。FIG. 7 is a rear view of a shell according to still another embodiment of the present invention.
２…背支桿 ５…シェル ５ａ…下縁 ５ｂ…側縁 ５ｃ…取付部 ５ｅ…下縁補強用リブ ５ｇ…応力分散用リブ ５ｈ…傾斜リブ ５ｎ…上半中央部 ５ｐ…下方端 ５ｑ…上方端 ５ｒ…横リブ ５ｓ…放射状リブ １００…椅子 Ｂ…ブラケット ＬＡ…下半部分 ＳＭ…補強部材 ＵＡ…上半部分 2 ... back support rod 5 ... shell 5a ... lower edge 5b ... side edge 5c ... mounting part 5e ... lower edge reinforcing rib 5g ... stress dispersion rib 5h ... inclined rib 5n ... upper half center part 5p ... lower end 5q ... upper side End 5r: Horizontal rib 5s: Radial rib 100: Chair B: Bracket LA: Lower half SM: Reinforcement member UA: Upper half
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭61−190250（ＪＰ，Ｕ) 実開 昭58−90158（ＪＰ，Ｕ) 実開 昭57−76551（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Real opening Sho 61-190250 (JP, U) Real opening Sho 58-90158 (JP, U) Real opening Sho 57-76551 (JP, U)
Claims (4)
縁に設けられた左右一対の取付部を背支桿の上端に取り
付けられるブラケットに止着する椅子のシェルであっ
て、少なくとも取付部間に形成される領域に前記取付部
同士を連結する剛性強化用の補強部材を設けてなり、補
強部材が、下縁に沿って設けられる下縁補強用リブと、
該下縁補強用リブの略中央部近傍に一方端を連結すると
ともに他方端を対応する取付部の上方にそれぞれ位置さ
せ、該一方端から対応する取付部に接近する方向へ膨ら
むように湾曲しつつ前記他方端にまで延びる左右一対の
傾斜リブとを、背面に突出させて設けたものであること
を特徴とする椅子のシェル。1. A chair shell in which an upper half portion is flexible, and a pair of right and left mounting portions provided on both side edges of a lower half portion are fixed to a bracket mounted on an upper end of a back support rod. Te, Ri Na provided a reinforcing member for rigidity reinforcement for connecting the mounting portions in the area to be formed at least between the attachment portion, complement
A strong member, a lower edge reinforcing rib provided along the lower edge,
When one end is connected near the approximate center of the lower edge reinforcing rib,
Both ends are located above the corresponding mounting parts.
And swell from the one end in the direction approaching the corresponding mounting part.
A pair of left and right sides that extend to the other end while bending
A chair shell, characterized in that an inclined rib is provided so as to protrude from the back .
する半円弧状の応力分散用リブを具備してなることを特
徴とする請求項１記載の椅子のシェル。2. A bulge to an upper edge of a substantially central portion of a lower edge reinforcing rib.
2. The chair shell according to claim 1 , further comprising a semicircular arc-shaped stress distributing rib .
縁に設けられた取付部を背支桿の上端に取り付けられる
ブラケットに止着する椅子のシェルであって、少なくと
も取付部間に形成される領域に前記取付部同士を連結す
る剛性強化用の補強部材を設けてなり、補強部材が、取
付部上縁同士を水平方向に連結する横リブと、それぞれ
の取付部の上部分を中心として他方の取付部方向と下縁
方向とに放射状に延長される放射状リブとを備えてなる
ことを特徴とする椅子のシェル。3. The upper half is flexible, and both sides of the lower half.
The attachment part provided on the edge can be attached to the upper end of the back support rod
A chair shell that fastens to a bracket, at least
Also connects the mounting portions to each other in a region formed between the mounting portions.
A reinforcing member is provided to enhance rigidity.
Horizontal ribs that connect the upper edges of the attached parts in the horizontal direction,
With the upper part of the mounting part as the center, the direction of the other mounting part and the lower edge
A chair shell, comprising: radial ribs extending radially in both directions .
を特徴とする請求項１、２又は３記載の椅子のシェル。4. The chair shell according to claim 1 , wherein each rib has a U-shaped cross section .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6066854A JP2708365B2 (en) | 1994-04-05 | 1994-04-05 | Chair shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6066854A JP2708365B2 (en) | 1994-04-05 | 1994-04-05 | Chair shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07275078A JPH07275078A (en) | 1995-10-24 |
| JP2708365B2 true JP2708365B2 (en) | 1998-02-04 |
Family
ID=13327861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6066854A Expired - Lifetime JP2708365B2 (en) | 1994-04-05 | 1994-04-05 | Chair shell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2708365B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009106420A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair with backrest |
| JP2009106421A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4534385B2 (en) * | 2001-05-31 | 2010-09-01 | 株式会社イトーキ | Chair backrest device |
| JP4817168B2 (en) * | 2005-01-31 | 2011-11-16 | コクヨ株式会社 | Chair |
| JP4710605B2 (en) * | 2005-12-29 | 2011-06-29 | 株式会社イトーキ | Chair backrest device |
| JP4872573B2 (en) * | 2006-09-28 | 2012-02-08 | 株式会社イトーキ | Chair backrest device |
| JP5461882B2 (en) * | 2009-05-11 | 2014-04-02 | 株式会社岡村製作所 | Chair |
| JP5437724B2 (en) * | 2009-07-27 | 2014-03-12 | 株式会社岡村製作所 | Chair backrest device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5890158U (en) * | 1981-12-14 | 1983-06-18 | 北陸化成株式会社 | Chair |
| JPS61190250U (en) * | 1985-05-20 | 1986-11-27 |
-
1994
- 1994-04-05 JP JP6066854A patent/JP2708365B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009106420A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair with backrest |
| JP2009106421A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07275078A (en) | 1995-10-24 |
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