JPH10262769A - Chair - Google Patents
ChairInfo
- Publication number
- JPH10262769A JPH10262769A JP7784797A JP7784797A JPH10262769A JP H10262769 A JPH10262769 A JP H10262769A JP 7784797 A JP7784797 A JP 7784797A JP 7784797 A JP7784797 A JP 7784797A JP H10262769 A JPH10262769 A JP H10262769A
- Authority
- JP
- Japan
- Prior art keywords
- seat
- torsion bar
- pieces
- backrest
- pair
- 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.)
- Granted
Links
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs Characterized By Structure (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、屈曲したトーショ
ンバーを使用し、背当ての後傾に伴って、座が後方へ移
動し、安楽姿勢をとり易い椅子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair using a bent torsion bar, in which a seat moves rearward as a backrest leans and a comfortable posture is easily taken.
【0002】[0002]
【従来の技術】屈曲したトーションバーを使用した椅子
が、特公昭47−43226号公報、特公昭48−33
223号公報、あるいは、実開昭52−39314号公
報等に開示されている。2. Description of the Related Art Chairs using a bent torsion bar are disclosed in JP-B-47-43226 and JP-B-48-33.
No. 223 or Japanese Utility Model Laid-Open No. 52-39314.
【0003】上記第1の公報に記載の椅子は、U字形に
折り曲げた側片の先端を、それぞれ外側方向に折曲し、
座の前半部下面周縁に沿うように折返して形成した水平
部を有する前部トーションバーと、座の後半部下面周縁
に沿うように折り曲げた水平部を両側を有し、中央部を
座の後縁中央部において上向きに起立折曲した後部トー
ションバーとを座の底面に固着するとともに、両トーシ
ョンバーの左右端を座の底部左右側縁の略中央部で接続
し、前部トーションバーの中央部先端を、脚側に取付け
る一方、後部トーションバーの中央部上端に背当てを取
付けた構成になっている。In the chair described in the first publication, the ends of the side pieces bent in a U-shape are bent outward, respectively.
It has a front torsion bar having a horizontal portion formed by folding back along the lower edge of the front half of the seat, and a horizontal portion bent along the lower edge of the rear half of the seat on both sides. At the center of the rim, a rear torsion bar that is bent upright is fixed to the bottom of the seat, and the right and left ends of both torsion bars are connected at substantially the center of the left and right side edges of the bottom of the seat, and the center of the front torsion bar is The rear end of the rear torsion bar is attached to the upper end of the rear torsion bar while the back end is attached to the leg side.
【0004】上記第2の公報に記載の椅子は、U字形に
折り曲げた1対のトーションバーを並列して設け、各々
の内側腕部の端部を脚部に固定し、U字形の底部及び外
側腕部を同一水平面内に置き、これに沿って、座の前半
部下面周縁を取付け、更に、座の後部中央に背凭れを、
前後調整自在に取付けた構成になっている。In the chair described in the second publication, a pair of torsion bars bent in a U-shape are provided in parallel, the ends of the inner arms are fixed to the legs, and the U-shaped bottom and Place the outer arm in the same horizontal plane, attach the lower edge of the front half of the seat along this, and place a backrest in the center of the rear of the seat,
It is configured to be adjustable back and forth.
【0005】上記第3の公報に記載の椅子は、背凭れが
固着された座席を、屈曲したトーションバーを介して脚
台に設けた構成になっている。The chair described in the third publication has a configuration in which a seat to which a backrest is fixed is provided on a footrest via a bent torsion bar.
【0006】[0006]
【発明が解決しようとする課題】上記第1、第2の公報
に記載の椅子は、座の傾動用の前部トーションバーと
は、別に、背当て用の後部トーションバーが必要であ
り、デザイン的な制約を受けること、構造が複雑である
こと、両トーションバーの弾力のバランス調整が難しい
こと等の問題がある。The chairs described in the first and second publications require a rear torsion bar for a backrest separately from a front torsion bar for tilting a seat, and the design is difficult. However, there are problems such as the fact that the structure is complicated, the balance between the elasticity of both torsion bars is difficult to adjust, and the like.
【0007】第3の公報に記載の椅子は、背当てが、座
席に対して弾性的に後傾するようになっていないため、
安楽姿勢がとりにくいという問題がある。In the chair described in the third publication, the backrest does not elastically lean backward with respect to the seat.
There is a problem that it is difficult to take a comfortable posture.
【0008】本発明は、従来の椅子が有する上記の問題
点に鑑み、背凭れに、トーションバーを使用することな
く、座の下部に設けたトーションバーによって、背当て
を、後傾可能にするとともに、座と背凭れとを連動させ
て、座の後方への移動と背当ての傾動との付勢力のバラ
ンスがとり易い椅子を提供することを目的とする。The present invention has been made in view of the above-mentioned problems of the conventional chair, and allows the backrest to be tilted backward by the torsion bar provided at the lower portion of the seat without using the torsion bar for the backrest. It is another object of the present invention to provide a chair in which the seat and the backrest are interlocked to easily balance the urging force between the rearward movement of the seat and the tilting of the backrest.
【0009】[0009]
【課題を解決するための手段】本発明によると、上記課
題は、次のようにして解決される。 (1) コ字状に屈曲された側片の先端を、それぞれ外側
方向に屈曲して形成された同一水平線上の左右1対の水
平片と、各水平片の外側両端部を後方へ屈曲して形成さ
れた左右1対の前後片とを有するトーションバーを座の
下部に備え、かつ上部に背当てを有する側面視L字状の
背凭れを座の後方に備える椅子において、前記トーショ
ンバーの中間部の後部を、脚柱の上端に固定した基枠に
取付け、前記左右1対の水平片を、前記基枠の前部に回
動可能に取付け、前記基枠の後部に下部前端が軸着され
た背凭れを、前記左右1対の前後片に前後摺動可能に、
かつ傾動可能に連結し、さらに、前記座の前後方向の中
間部の下部を、前記トーションバーの前後片に前後摺動
可能に取付け、前記背凭れと座の後部とを連結すること
により、前記背当ての傾動と連動して、前記座を前後摺
動及び傾動させるようにする。According to the present invention, the above-mentioned problem is solved as follows. (1) A pair of left and right horizontal pieces on the same horizontal line formed by bending the tips of the side pieces bent in a U-shape outward, respectively, and bending both outer ends of each horizontal piece backward. A chair provided with a torsion bar having a pair of left and right front and rear pieces formed at the lower part of the seat, and having an L-shaped backrest in a side view having a backrest at the upper part of the seat, The rear part of the intermediate part is mounted on a base frame fixed to the upper end of a pillar, the left and right horizontal pieces are rotatably mounted on the front part of the base frame, and the lower front end is pivotally mounted on the rear part of the base frame. The worn backrest can be slid back and forth on the pair of left and right front and rear pieces,
And tiltably connected, and furthermore, the lower part of the middle part in the front-rear direction of the seat is attached to the front and rear pieces of the torsion bar so as to be slidable back and forth, and the backrest and the rear part of the seat are connected to each other. The seat is slid forward and backward and tilted in conjunction with the tilting of the backrest.
【0010】(2) 上記(1)項において、トーションバ
ーは、U字形に折り曲げて並設された左右1対のトーシ
ョンバー素片で形成され、該トーションバー基片の内側
腕部と、該腕部の先端を互いに突き合わせる向きに屈曲
した屈曲部とにより中間部を形成する。(2) In the above item (1), the torsion bar is formed by a pair of left and right torsion bar pieces which are bent and formed in a U-shape and are arranged side by side. An intermediate portion is formed by a bent portion in which the ends of the arm portions are bent so as to abut each other.
【0011】(3) 上記(1)または(2)項において、ト
ーションバーの中間部の後部を、前後片より下方に位置
させる。(3) In the above item (1) or (2), the rear portion of the intermediate portion of the torsion bar is located below the front and rear pieces.
【0012】(4) 上記(1)〜(3)項のいずれかにおい
て、座の前部に設けた長孔を、基枠の前部の左右に備え
られた左右1対の係合片に前後動可能に連結し、座の前
後方向の中間部を、トーションバーの左右1対の前後片
に前後移動可能に設けた移動駒に連結する。(4) In any one of the above items (1) to (3), the long holes provided at the front portion of the seat may be fitted to a pair of left and right engagement pieces provided at the left and right of the front portion of the base frame. An intermediate portion of the seat in the front-rear direction is connected to a movable piece provided on a pair of left and right front and rear pieces of the torsion bar so as to be movable back and forth.
【0013】(5) 上記(4)項において、係合片に、長
孔が係合片から上方へ抜けないようする抜け防止鍔を形
成し、かつ長孔には、該長孔の幅より径が大きい貫通許
容孔を連続して形成する。(5) In the above item (4), the engaging piece is provided with a slip-off preventing flange for preventing the elongated hole from being pulled upward from the engaging piece, and the elongated hole has a width smaller than the width of the elongated hole. The permissible through holes having a large diameter are continuously formed.
【0014】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図1
〜図13に基づいて説明する。椅子(1)は、図1〜図4
に示すように、左右両側に脚(2)と肘掛(7)を備えた基
枠(3)と、基枠(3)に設けられたトーションバー(4)
と、基枠(3)に直接或いはトーションバー(4)を介して
基枠(3)に設けられた座(5)と、基枠(3)に前後傾動可
能に設けられて座(5)に連結された背凭れ(6)とを備え
ている。FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. The chair (1) is shown in Figs.
As shown in the figure, a base frame (3) provided with legs (2) and armrests (7) on both left and right sides, and a torsion bar (4) provided on the base frame (3)
And a seat (5) provided on the base frame (3) directly or via the torsion bar (4), and a seat (5) provided on the base frame (3) so as to be tiltable back and forth. And a backrest (6) connected to the backrest.
【0015】図4に示すように、左右の1対の脚(2)
(片方の脚は省略)は、ボルト(8)によって、基枠
(3)に取付けられている。左右の肘掛(7)は、肘掛支
持軸(9)によって、背当て(15)を有する背凭れ(6)は、
背凭れ支持軸(14)によって、基枠(3)に前後方向に傾動
可能に設けられている。背凭れ支持軸(14)は、図11、
図12に示す、ブシュ(31)を介して基枠(3)上の軸受部
(32)(32)に軸受けされている。As shown in FIG. 4, a pair of left and right legs (2)
(One leg is omitted), the base frame by bolts (8)
It is attached to (3). The left and right armrests (7) are supported by an armrest support shaft (9), and a backrest (6) having a backrest (15)
The backrest support shaft (14) is provided on the base frame (3) so as to be tiltable in the front-rear direction. The backrest support shaft (14) is shown in FIG.
Bearing part on base frame (3) via bush (31) shown in FIG.
(32) The bearing is mounted on (32).
【0016】軸受部(32)には、支持軸(14)が上方へ抜け
ないように、受け止め片(30)が設けられている。また支
持軸(14)の一端には抜け止め鍔(14a)が設けられ、この
鍔(14a)に対向して、抜け止め突片(33)が基枠(3)に突
設されている。支持軸(14)の抜け防止に、鍔(14a)を省
略して、支持軸(14)の両端に対向して突片を基枠(3)突
設してもよい。The bearing portion (32) is provided with a receiving piece (30) so that the support shaft (14) does not come off. A retaining flange (14a) is provided at one end of the support shaft (14), and a retaining protrusion (33) is provided on the base frame (3) so as to face the flange (14a). In order to prevent the support shaft (14) from coming off, the flange (14a) may be omitted, and a protruding piece may be protruded from the base frame (3) opposite to both ends of the support shaft (14).
【0017】図4に示す肘掛(7)の上端は、背凭れ(6)
の中間部に取付けられ、背凭れ(6)と一体に前後方向に
傾動するようになっている。そのため、肘掛(7)と背凭
れ(6)との傾動中心は、互いに一致していなければなら
ず、肘掛支持軸(9)と背凭れ支持軸(14)は、都合4本
(図では2本省略)が軸心を一致させて基枠(3)上に左
右方向に配列されている。The upper end of the armrest (7) shown in FIG.
And is tilted in the front-rear direction integrally with the backrest (6). For this reason, the tilting centers of the armrest (7) and the backrest (6) must coincide with each other, and the armrest support shaft (9) and the backrest support shaft (14) have four (2 in FIG. (Not shown) are aligned in the left-right direction on the base frame (3) with their axes aligned.
【0018】背凭れ(6)は、図1、図3、図9、図10
に示すように、背凭れ(6)の左右方向の両側近くに設け
られた左右1対の連結片(16)(片方は図示省略)によっ
て、後述するインナーシェル(11)の後部に連結されてい
る。この後部には、連結片(16)に係合する孔(34)が形成
されている。座(5)は、図1、図2に示すアウターシェ
ル(10)と、インナーシェル(11)とを備えている。両シェ
ル(10)(11)は、連結軸(12)によって先端同士が連結さ
れ、かつ前後方向の中間部分同士が適宜連結されてい
る。The backrest (6) is shown in FIGS. 1, 3, 9, and 10.
As shown in FIG. 6, a pair of left and right connecting pieces (16) (one of which is not shown) provided near both sides in the left-right direction of the backrest (6) are connected to a rear portion of an inner shell (11) described later. I have. A hole (34) that engages with the connecting piece (16) is formed in the rear portion. The seat (5) includes an outer shell (10) shown in FIGS. 1 and 2 and an inner shell (11). Both shells (10) and (11) have their ends connected by a connection shaft (12), and their middle portions in the front-rear direction are appropriately connected.
【0019】図3に示す、トーションバー(4)は、1本
の丸棒鋼材を折り曲げて形成されている。トーションバ
ー(4)は、コ字状に屈曲された中間部(17)における側片
(4a)の先端を、それぞれ外側方向に屈曲して形成された
同一水平線上の左右1対の水平片(4b)と、該1対の水平
片の外側両端部を後方へ屈曲して形成された左右1対の
前後片(4c)とを有している。The torsion bar (4) shown in FIG. 3 is formed by bending a single round steel bar. The torsion bar (4) is a side piece at the middle portion (17) bent in a U-shape.
The tip of (4a) is formed by bending a pair of left and right horizontal pieces (4b) on the same horizontal line formed by bending outwards, and bending both outer ends of the pair of horizontal pieces backward. And a pair of left and right front and rear pieces (4c).
【0020】トーションバー(4)は、図1、図2に示す
ように、中間部(17)の後部(17a)が前後片より下方に位
置するように上下方向にも屈曲している。トーションバ
ーの中間部(17)は、基枠(3)に設けられた受け片(18)の
凹部(18a)に上方から接触して、受け片(18)に受け止め
られている。凹部(18a)の深さを変えることによって、
トーションバーの弾力を変えることができる。As shown in FIGS. 1 and 2, the torsion bar (4) is also bent vertically so that the rear portion (17a) of the intermediate portion (17) is located below the front and rear pieces. The intermediate portion (17) of the torsion bar comes into contact with the recess (18a) of the receiving piece (18) provided on the base frame (3) from above and is received by the receiving piece (18). By changing the depth of the recess (18a),
You can change the elasticity of the torsion bar.
【0021】トーションバーの左右1対の水平片(4b)
は、図1、図5、図6に示す、基枠(3)の前部の左右に
形成された上部が開口する左右1対の凹所(19)に嵌合す
る左右1対のトーションバー支持片(20)に回転可能に設
けられている。トーションバー支持片(20)には、水平片
(4b)に嵌合する嵌合部(20a)と、水平片(4b)を嵌合部(20
a)に受け入れるための開口部(20b)とが形成されてい
る。開口部(20b)は、トーションバー(4)の前部に形成
されているが、後部に形成されていてもよい。トーショ
ンバー支持片(20)は、凹所(19)に設けられた抜け止め片
(21)によって抜け止めされている。A pair of left and right horizontal pieces (4b) of the torsion bar
Is a pair of left and right torsion bars that fit into a pair of left and right recesses (19) formed on the left and right of the front part of the base frame (3) shown in FIGS. The support piece (20) is rotatably provided. The torsion bar support piece (20) has a horizontal piece
(4b) and the horizontal piece (4b) with the fitting part (20a)
An opening (20b) for receiving is formed in a). The opening (20b) is formed at the front of the torsion bar (4), but may be formed at the rear. The torsion bar support piece (20) is a retaining piece provided in the recess (19).
(21) is locked.
【0022】左右1対のトーションバー支持片(20)の各
上端には、アウターシェル(10)の前部に前後方向を向い
て形成された長孔(22)に係合する係合片(23)が形成され
ている。At the upper end of each of the pair of left and right torsion bar support pieces (20), an engagement piece () that engages with a long hole (22) formed in the front part of the outer shell (10) in the front-rear direction. 23) is formed.
【0023】係合片(23)の頭部には、座(5)が係合片(2
3)から上方への抜けないようにする抜け防止鍔(24)が設
けられている。長孔(22)には、長孔(22)の幅より径が大
の抜け防止鍔(24)を貫通させる貫通許容孔(22a)が連続
して形成されている。On the head of the engaging piece (23), a seat (5) is provided with an engaging piece (2).
A detachment prevention collar (24) is provided to prevent the detachment from going upward from 3). In the long hole (22), a through-permissible hole (22a) is formed continuously so as to penetrate the escape prevention flange (24) having a diameter larger than the width of the long hole (22).
【0024】従って、係合片(23)と長孔(22)は、貫通許
容孔(22a)に抜け防止鍔(24)を貫通させた後、係合片(2
3)を長孔(22)に沿って貫通許容孔(22a)から離れる方向
に移動させると、互いに外れないように係合させられ
る。抜け防止鍔(24)の下面(24a)と、抜け止め片(21)の
上面(21a)は、座(5)の後傾と後方への移動を許容する
突出円弧面が形成されている。Therefore, after the engagement piece (23) and the elongated hole (22) are made to pass through the penetration prevention hole (22a) through the slip-off preventing flange (24), the engagement piece (2
When 3) is moved along the long hole (22) in a direction away from the through-permissible hole (22a), they are engaged so as not to come off from each other. The lower surface (24a) of the stopper flange (24) and the upper surface (21a) of the retaining piece (21) are formed with protruding arc surfaces that allow the seat (5) to tilt backward and move backward.
【0025】図1、図4に示すように、アウターシェル
(10)の下端には、トーションバー(4)の左右1対の前後
片(4c)上を前後移動可能な移動駒(25)がボルト(13)によ
り連結されている。移動駒(25)には、トーションバーを
受け入れる凹部(25a)が形成されている。As shown in FIGS. 1 and 4, the outer shell
At the lower end of (10), a movable piece (25) that can move back and forth on a pair of left and right front and rear pieces (4c) of the torsion bar (4) is connected by bolts (13). The moving piece (25) has a recess (25a) for receiving a torsion bar.
【0026】背凭れ(6)の左右には、図1、図3、図
7、図8に示す、トーションバー(4)の前後片(4c)の後
端に上方から接触する左右1対の押圧駒(26)が設けられ
ている。押圧駒(26)には、トーションバーを受け入れる
凹部(26a)が形成されている。On the left and right sides of the backrest (6), a pair of left and right parts which contact the rear ends of the front and rear pieces (4c) of the torsion bar (4) shown in FIGS. 1, 3, 7, and 8 from above. A pressing piece (26) is provided. The pressing piece (26) has a recess (26a) for receiving the torsion bar.
【0027】背凭れの下端前部には、図11に示す、回
動規制突片(27)が設けられている。回動規制突片(27)に
対向する基枠上には、パッド(28)が設けられている。A rotation restricting projection (27) shown in FIG. 11 is provided at the front of the lower end of the backrest. A pad (28) is provided on the base frame facing the rotation restricting projection (27).
【0028】背凭れの下端前部には、過傾動規制片(29)
が一体に形成されている。基枠には、過傾動規制片(29)
を受け止める受け止め片(30)が設けられている。受け止
め片(30)は、断面側面視、略V字状に形成されており、
前半部分が後傾規制面(30a)になっており、後半部分が
前傾規制面(30b)になっている。At the front of the lower end of the backrest, an excessive tilting restricting piece (29) is provided.
Are integrally formed. Excess tilt control piece (29)
A receiving piece (30) for receiving the light is provided. The receiving piece (30) is formed in a substantially V-shaped cross-sectional side view,
The front half portion is a rearward tilt restriction surface (30a), and the rear half portion is a front tilt restriction surface (30b).
【0029】次に作用を説明する。人が椅子(1)に座
り、安楽姿勢をとると、背凭れ(6)に、後傾の力が加わ
り、背凭れ(6)が、背凭れ支持軸(14)を中心に後傾させ
られる。Next, the operation will be described. When a person sits on the chair (1) and takes a comfortable posture, a force of backward tilt is applied to the backrest (6), and the backrest (6) is tilted backward about the backrest support shaft (14). .
【0030】背凭れ(6)の後傾に伴って、背凭れ(6)上
の連結片(16)が、背凭れ(6)と一体に、後方、かつ下
方へ移動しながら、インナーシェル(11)を後方へ引っ張
りながら、インナーシェル(11)の後端を下方に引き下げ
る。インナーシェル(11)が後方へ引っ張られると、アウ
ターシェル(10)も後方へ移動する。すなわち、座(5)が
後方へ移動しながら、座(5)の後部は下降する。As the backrest (6) is tilted backward, the connecting piece (16) on the backrest (6) moves backward and downward integrally with the backrest (6) while moving the inner shell (6). Pull down the rear end of the inner shell (11) while pulling back on (11). When the inner shell (11) is pulled backward, the outer shell (10) also moves backward. That is, the rear part of the seat (5) descends while the seat (5) moves rearward.
【0031】背凭れ(6)の後傾に伴って、背凭れ(6)上
の押圧駒(26)もトーションバー(4)の前後片(4c)の後端
をトーションバーの弾力に抗して押し下げる。着座した
人の背凭れ(6)に対する寄り掛かり力と、トーションバ
ーの弾力との釣り合いがとれたところで、背凭れの後傾
が停止する。As the backrest (6) is tilted backward, the pressing pieces (26) on the backrest (6) also push the rear ends of the front and rear pieces (4c) of the torsion bar (4) against the elasticity of the torsion bar. And push down. When the leaning force of the seated person against the backrest (6) and the elasticity of the torsion bar are balanced, the backward leaning of the backrest stops.
【0032】よって、着座した人は、座(5)の後方への
移動しながらの後端の下降と、背凭れ(6)の後傾とによ
って、安楽姿勢をとることができる。これらの作用は、
1つのトーションバーの弾性変形と弾力を利用して行な
われるため、椅子の構造が簡素になっている。Thus, the seated person can take a comfortable posture by lowering the rear end while moving backward from the seat (5) and tilting the backrest (6) backward. These effects are
Since the elastic deformation and elasticity of one torsion bar are used, the structure of the chair is simplified.
【0033】なお、背凭れを大きく後傾させた場合に
は、傾動規制突片(29)がパッド(28)に当たり、背凭れの
後傾阻止による衝撃を和らげてから、過傾動規制片(29)
が受け止め片(30)の後傾規制面(30a)に当接して、背凭
れの後傾を規制し、着座した人の後転を防止している。In the case where the backrest is largely tilted backward, the tilt-restricting projection (29) hits the pad (28) to reduce the impact caused by preventing the backrest from tilting backward. )
Abuts on the rearward tilt regulating surface (30a) of the receiving piece (30) to restrict the rearward tilt of the backrest, thereby preventing the seated person from rolling backward.
【0034】着座していた人が椅子から離れると、背凭
れ(6)は、トーションバーによって前傾させられ、受け
止め片(30)の前傾規制面(30b)に過傾動規制片(27)が当
接することによって、前傾規制されて、所定の起立状態
に戻る。When the seated person leaves the chair, the backrest (6) is tilted forward by the torsion bar, and the overtilt movement restricting piece (27) is placed on the forward tilt restricting surface (30b) of the receiving piece (30). Abuts, the forward lean is regulated, and returns to a predetermined standing state.
【0035】トーションバーの変形例として、図13に
示す、トーションバー(40)がある。このトーションバー
(40)は、U字形に折り曲げて並設された左右1対のトー
ションバー素片(41)(41)で形成され、トーションバー素
片の内側腕部(42)と、腕部の先端を互いに突き合わせる
向きに屈曲した屈曲部(42a)とで、上記トーションバー
(4)の中間部(17)に相当する部分が形成されている。As a modification of the torsion bar, there is a torsion bar (40) shown in FIG. This torsion bar
(40) is formed by a pair of right and left torsion bar pieces (41) and (41) which are bent and arranged in a U-shape, and the inner arm (42) of the torsion bar piece and the tip of the arm are formed. With the bent portion (42a) bent in a direction to abut each other, the torsion bar
A portion corresponding to the intermediate portion (17) of (4) is formed.
【0036】[0036]
【発明の効果】請求項1の発明によると、背凭れをトー
ションバーで形成することなく、座の下方に設けられた
屈曲した1つのトーションバーによって、座と背凭れを
連動させて、傾動させることができるため、構造を簡単
にして、座の傾動及び背凭れの後傾、並びにトーション
バーの弾力とのバランスを容易に取ることができる。ま
た、デザインの自由度を高めることができる。According to the first aspect of the present invention, the seat and the backrest are interlocked and tilted by one bent torsion bar provided below the seat without forming the backrest with a torsion bar. Therefore, the structure can be simplified, and the balance between the tilting of the seat and the backward tilt of the backrest, and the elasticity of the torsion bar can be easily achieved. In addition, the degree of freedom in design can be increased.
【0037】請求項2の発明のように、トーションバー
を左右1対のトーションバー素片で形成すると、トーシ
ョンバーの折り曲げ成形が容易になる。When the torsion bar is formed of a pair of left and right torsion bar pieces as in the second aspect of the present invention, the bending of the torsion bar is facilitated.
【0038】請求項3の発明のように、トーションバー
の中間部を前後片より下方に位置せしめると、トーショ
ンバーに所望の弾力を持たせることができる。When the intermediate portion of the torsion bar is positioned below the front and rear pieces as in the invention of claim 3, the torsion bar can have a desired elasticity.
【0039】請求項4の発明のように、座の前部に形成
された長孔を、基枠の前部の左右に備えられた左右1対
の係合片に前後動可能に連結し、座の前後方向の中間部
を、トーションバーの左右1対の前後片に前後移動可能
に設けられた移動駒に連結すると、座を、基枠とトーシ
ョンバーとにより確実に支持することができる。According to a fourth aspect of the present invention, the long hole formed in the front portion of the seat is connected to a pair of left and right engagement pieces provided on the left and right of the front portion of the base frame so as to be movable back and forth, When the middle portion of the seat in the front-rear direction is connected to a movable piece provided to be movable back and forth on a pair of left and right front and rear pieces of the torsion bar, the seat can be reliably supported by the base frame and the torsion bar.
【0040】請求項5の発明のように、係合片には長孔
が係合片から上方へ抜けないようする抜け防止鍔が形成
され、長孔には、該長孔の幅より径が大の貫通許容孔が
連続して形成されていると、貫通許容孔に抜け防止鍔を
貫通させた後、座を正常な前後位置に移動させることに
よって、基枠から座が外れないように、基枠に座を簡単
に組み込むことができる。According to the fifth aspect of the present invention, the engaging piece is provided with a retaining flange for preventing the elongated hole from coming off from the engaging piece, and the elongated hole has a diameter larger than the width of the elongated hole. If a large penetration allowable hole is formed continuously, after the penetration prevention flange is penetrated through the penetration allowable hole, by moving the seat to a normal front and rear position, so that the seat does not come off from the base frame, The seat can be easily incorporated into the base frame.
【図1】本発明の実施形態の椅子の、座、基枠及び背凭
れの下部の断面側面図である。FIG. 1 is a sectional side view of a lower portion of a seat, a base frame, and a backrest of a chair according to an embodiment of the present invention.
【図2】図1の状態から背凭れを後傾させた状態の、
座、基枠及び背凭れの下部の断面側面図である。FIG. 2 shows a state in which the backrest is tilted backward from the state of FIG.
It is a sectional side view of the lower part of a seat, a base frame, and a backrest.
【図3】トーションバーを備えた基枠の右半分を省略し
た平面図である。FIG. 3 is a plan view in which a right half of a base frame having a torsion bar is omitted.
【図4】図1中IV−IV矢視断面図である。FIG. 4 is a sectional view taken along the line IV-IV in FIG.
【図5】トーションバーの水平部の、基枠に対する取付
け部分の断面側面図である。FIG. 5 is a cross-sectional side view of a mounting portion of a horizontal portion of the torsion bar to a base frame.
【図6】図5中VI−VI矢視断面図である。6 is a sectional view taken along the line VI-VI in FIG.
【図7】トーションバーの後端部の、基枠に対する取付
け部分の断面側面図である。FIG. 7 is a sectional side view of a mounting portion of a rear end of the torsion bar to a base frame.
【図8】図7中VIII−VIII矢視断面図である。8 is a sectional view taken along the line VIII-VIII in FIG.
【図9】座のインナーシェルと、背凭れとの連結部分の
断面側面図である。FIG. 9 is a cross-sectional side view of a connection portion between the inner shell of the seat and the backrest.
【図10】図9中X−X矢視断面図である。FIG. 10 is a sectional view taken along the line XX in FIG. 9;
【図11】基枠と背凭れとの連結部分の側面図であり、
一部断面で表してある。FIG. 11 is a side view of a connecting portion between the base frame and the backrest;
Partly shown in cross section.
【図12】図11中XII−XII矢視断面図である。12 is a sectional view taken along the line XII-XII in FIG.
【図13】他の実施形態のトーションバーの平面図であ
る。FIG. 13 is a plan view of a torsion bar according to another embodiment.
(1)椅子 (2)脚 (3)基枠 (4)トーションバー (4a)側片 (4b)水平片 (4c)前後片 (5)座 (6)背凭れ (7)肘掛 (8)脚取付け用ボルト (9)肘掛支持軸 (10)アウターシェル (11)インナーシェル (12)連結軸 (13)ボルト (14)背凭れ支持軸 (15)背当て (16)背凭れとインナーシェルとの連結片 (17)中間部 (17a)トーションバーの中間部の後部 (18)受け片 (18a)受け片の凹所 (19)凹部 (20)トーションバー支持片 (20a)嵌合部 (20b)開口部 (21)抜け止め片 (21a)抜け止め片の上面 (22)長孔 (22a)貫通許容孔 (23)係合片 (24)抜け防止鍔 (25)移動駒 (25a)凹部 (26)押圧駒 (26a)凹部 (27)傾動規制突片 (28)パッド (29)過傾動規制片 (30)受け止め片 (30a)後傾規制面 (30b)前傾規制面 (31)ブシュ (32)軸受部 (33)抜け止め突片 (34)孔 (40)トーションバー (41)トーションバー素片 (42)内端腕部 (42a)屈曲部 (1) Chair (2) Leg (3) Base frame (4) Torsion bar (4a) Side piece (4b) Horizontal piece (4c) Front and rear piece (5) Seat (6) Backrest (7) Armrest (8) Leg Mounting bolt (9) Armrest support shaft (10) Outer shell (11) Inner shell (12) Connecting shaft (13) Bolt (14) Backrest support shaft (15) Backrest (16) Between backrest and innershell Connection piece (17) Intermediate part (17a) Rear part of intermediate part of torsion bar (18) Receptacle (18a) Recess recess (19) Recess (20) Torsion bar support piece (20a) Fitting part (20b) Opening (21) Retaining piece (21a) Upper surface of retaining piece (22) Elongated hole (22a) Permissible hole (23) Engagement piece (24) Prevention flange (25) Moving piece (25a) Recess (26 ) Pressing piece (26a) Recess (27) Tilt restricting projection (28) Pad (29) Excessive tilt restricting piece (30) Receiving piece (30a) Rear tilt restricting surface (30b) Forward tilt restricting surface (31) Bush (32 ) Bearing part (33) Retaining protrusion (34) Hole (40) Torsion bar (41) Torsion bar element (42) Inner arm (42a) Bend
Claims (5)
ぞれ外側方向に屈曲して形成された同一水平線上の左右
1対の水平片と、各水平片の外側両端部を後方へ屈曲し
て形成された左右1対の前後片とを有するトーションバ
ーを座の下部に備え、かつ上部に背当てを有する側面視
L字状の背凭れを座の後方に備える椅子において、 前記トーションバーの中間部の後部を、脚柱の上端に固
定した基枠に取付け、前記左右1対の水平片を、前記基
枠の前部に回動可能に取付け、前記基枠の後部に下部前
端が軸着された背凭れを、前記左右1対の前後片に前後
摺動可能に、かつ傾動可能に連結し、さらに、前記座の
前後方向の中間部の下部を、前記トーションバーの前後
片に前後摺動可能に取付け、前記背凭れと座の後部とを
連結することにより、前記背当ての傾動と連動して、前
記座を前後摺動及び傾動させるようにしたことを特徴と
する椅子。1. A pair of left and right horizontal pieces on the same horizontal line formed by bending the ends of side pieces bent in a U-shape outward, respectively, and the outer ends of each horizontal piece to the rear. A chair provided with a torsion bar having a pair of left and right front and rear pieces formed to be bent at a lower portion of a seat, and having an L-shaped backrest having a backrest at an upper portion at a rear side of the seat, wherein the torsion is provided. The rear part of the middle part of the bar is mounted on a base frame fixed to the upper end of a pillar, the pair of left and right horizontal pieces are rotatably mounted on the front part of the base frame, and the lower front end is mounted on the rear part of the base frame. Is connected to the pair of left and right front and rear pieces so as to be slidable back and forth and tiltable, and further, a lower part of a middle portion of the seat in the front and rear direction is connected to the front and rear pieces of the torsion bar. By slidably attached to the back and forth, and connecting the backrest and the rear of the seat, In conjunction with the tilting of the dress against a chair, characterized in that the said seat so as to slide and tilt back and forth.
げて並設された左右1対のトーションバー素片で形成さ
れ、該トーションバー基片の各々の内側腕部と、該腕部
の先端を互いに突き合わせる向きに屈曲した屈曲部とに
より、中間部を形成した請求項1記載の椅子。2. The torsion bar is formed by a pair of left and right torsion bar pieces which are bent and arranged substantially in a U-shape, and each inner arm portion of the torsion bar base piece and a tip of the arm portion are formed. 2. The chair according to claim 1, wherein an intermediate portion is formed by the bent portions bent in a direction in which they abut each other.
片より下方に位置させた請求項1または2記載の椅子。3. The chair according to claim 1, wherein a rear portion of the intermediate portion of the torsion bar is located below the front and rear pieces.
部の左右に設けた左右1対の係合片に前後動可能に連結
し、座の前後方向の中間部を、トーションバーの左右1
対の前後片に前後移動可能に設けた移動駒に連結してな
る請求項1〜3のいずれかに記載の椅子。4. An elongated hole formed in the front portion of the seat is connected to a pair of left and right engagement pieces provided on the left and right of the front portion of the base frame so as to be movable back and forth. , Left and right of torsion bar 1
The chair according to any one of claims 1 to 3, wherein the chair is connected to a movable piece provided to be movable back and forth on a pair of front and rear pieces.
ないようする抜け防止鍔を形成し、かつ長孔には、該長
孔の幅より径が大きい貫通許容孔が連続して形成されて
いる請求項4記載の椅子。5. An engaging piece is provided with a stopper for preventing a long hole from coming out of the engaging piece upward, and a permissible through-hole having a diameter larger than the width of the long hole is continuously formed in the long hole. 5. The chair according to claim 4, wherein the chair is formed as follows.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07784797A JP3810880B2 (en) | 1997-03-28 | 1997-03-28 | Chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07784797A JP3810880B2 (en) | 1997-03-28 | 1997-03-28 | Chair |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10262769A true JPH10262769A (en) | 1998-10-06 |
JP3810880B2 JP3810880B2 (en) | 2006-08-16 |
Family
ID=13645456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP07784797A Expired - Fee Related JP3810880B2 (en) | 1997-03-28 | 1997-03-28 | Chair |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3810880B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010044654A (en) * | 2001-03-14 | 2001-06-05 | 이재진 | Easy chair |
JP2009183624A (en) * | 2008-02-08 | 2009-08-20 | Takano Co Ltd | Reaction force device for chair |
-
1997
- 1997-03-28 JP JP07784797A patent/JP3810880B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010044654A (en) * | 2001-03-14 | 2001-06-05 | 이재진 | Easy chair |
JP2009183624A (en) * | 2008-02-08 | 2009-08-20 | Takano Co Ltd | Reaction force device for chair |
Also Published As
Publication number | Publication date |
---|---|
JP3810880B2 (en) | 2006-08-16 |
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