JP3326202B2 - Chair - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、人間工学的にみて座り
心地の良い椅子の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a chair which is ergonomically comfortable.

【０００２】[0002]

【従来の技術】本出願人は、先に特開平３−６０６０７
号公報において、椅子の支持枠体上に配置する座体を、
前座受体とこれに屈曲及び伸縮可能に連結した後座受体
とよにり構成し、前座受体と後座受体とを側面視Ｘ字状
に交叉させた一対のリンクを介して前記支持枠体に連結
し、支持枠体と前記前後座受体との間に、当該各座受体
をそれぞれ上向き付勢するバネを設け、また、後座受体
と支持枠体の後部とに円弧状のガイド溝をそれぞれ穿設
し、この両ガイド溝に背もたれ支持杆の下部を沿わせて
移動可能にピン連結する構成を提案した。2. Description of the Related Art The present applicant has previously disclosed Japanese Patent Application Laid-Open No. Hei 3-60607.
In the official gazette, a seat to be placed on a support frame of a chair,
A front seat receiver and a rear seat receiver connected to the front seat receiver so as to be able to bend and expand and contract therewith, and the front seat receiver and the rear seat receiver are connected via a pair of links crossing each other in an X-shape in side view. Connected to the support frame, a spring is provided between the support frame and the front and rear seat receiver to bias each of the seat receivers upward, and a rear seat support and a rear portion of the support frame are provided. A configuration was proposed in which arcuate guide grooves were respectively formed, and pins were movably connected to both guide grooves along the lower portion of the back support rod.

【０００３】この構成によれば、座体に座る着座者のヒ
ップポイントを中心にして背もたれ部が後傾回動するよ
うに、背もたれ支持杆を後傾回動させると同時に、後座
受体も連動して後傾動させることを意図するものであっ
た。According to this configuration, the backrest support rod is tilted rearward so that the backrest portion is tilted rearward about the hip point of the occupant sitting on the seat, and the rear seat receiver is also tilted. It was intended to tilt backward in conjunction with it.

【０００４】[0004]

【発明が解決しようとする課題】ところで、座り心地が
良い椅子を人間工学的に考察すると、椅子の座体に着座
した人の上半身が起立状態であるときと、後傾したとき
とで、背もたれ部及び座体に対する前記ヒップポイント
（転子点）の位置がずれないことであるといわれてい
る。Considering the ergonomics of a chair that is comfortable to sit on, the backrest of the person sitting on the chair body stands when the upper body is standing and when it is tilted backward. It is said that the position of the hip point (trochanter point) with respect to the part and the seat does not shift.

【０００５】即ち、図１に示すように、ヒップポイント
は、大腿骨１０２上端の大転子の位置（転子点：Ｔ）で
あって、着座者Ｍの上半身が背もたれ部１００にもたれ
掛かるとき、この転子点Ｔを中心に、当該着座者Ｍの骨
盤１０１は、その下部が前方に移動する方向に回動する
といわれている。しかしながら、着座者Ｍの骨盤１０１
のうち座骨の下端Ｋは座体（座のクッション）１０３の
上面後部に接触しているため、上半身の起立状態から後
傾状態に移るとき、前記骨盤１０１の回動にて臀部下面
側と座体１０３のクッションとの間で相対的移動が起こ
ると、座体１０２に接するズボンの上部が引っ張られる
等の不都合が起こる。That is, as shown in FIG. 1, the hip point is the position of the greater trochanter at the upper end of the femur 102 (trochanter point: T), and when the upper body of the occupant M leans on the backrest 100. It is said that the pelvis 101 of the seated person M rotates around the trochanter point T in a direction in which the lower part moves forward. However, the pelvis 101 of the seated person M
Of these, the lower end K of the ischium is in contact with the rear of the upper surface of the seat body (cushion of the seat) 103, so that when the upper body shifts from the upright state to the rearwardly inclined state, the pelvis 101 rotates and the buttocks lower surface side is seated. When the relative movement between the body 103 and the cushion occurs, inconveniences such as the pulling of the upper part of the pants in contact with the seat body 102 occur.

【０００６】また、前記座体１０３が前方に移動しない
ときには、着座者Ｍの骨盤１０１のうち座骨の下端Ｋが
座体（座のクッション）１０３の上面後部に接触してい
ると、当該座骨の下端Ｋ点を中心にして骨盤１０１が回
動することになり、前記転子点Ｔは、上半身の起立状態
から後傾状態に移るのに応じて後方に移動することにな
り、座り心地が悪くなる。When the seat 103 does not move forward, if the lower end K of the washer in the pelvis 101 of the seated person M is in contact with the rear of the upper surface of the seat (cushion of seat) 103, the seat is not moved. The pelvis 101 rotates around the lower end K point, and the trochanter point T moves rearward as the upper body shifts from the standing state to the rearwardly inclined state, resulting in poor sitting comfort. Become.

【０００７】一方、ヒップポイント（転子点：Ｔ）の位
置が、背もたれ部１００及び座体１０３の両者に対して
ずれないとき、換言すると、背もたれ部１００及び座体
１０３の両者が後傾する前と後とで転子点Ｔの位置が変
位しないときには、上半身が起立状態から後傾状態に移
行するとき、着座者のワイシャツや上衣が接する背もた
れ部により捲り上げられたり、座体に接するズボンの上
部が引っ張られる等の不都合がなくなり、且つ座り心地
も良好となる。On the other hand, when the position of the hip point (trochanter: T) does not deviate from both the backrest 100 and the seat 103, in other words, both the backrest 100 and the seat 103 tilt backward. When the position of the trochanter point T is not displaced between the front and the rear, when the upper body shifts from the upright state to the rearwardly inclined state, the trousers are turned up by the backrest portion to which the shirt or upper garment of the occupant contacts, or the pants contact the seat body. The inconvenience such as the upper part of the car being pulled is eliminated, and the sitting comfort is improved.

【０００８】そこで、本発明は、座体と背もたれ部とが
後傾時に連動するような椅子において、座り心地の良
い、且つ着座者の衣服に対するずれ等も生じないよう
な、人間工学的に優れた椅子を提供することを目的とす
るものである。Therefore, the present invention provides an ergonomic chair in which the seat body and the backrest part are interlocked with each other when the seat is tilted backward so that the seat is comfortable and the seated person does not shift with respect to the clothes. The purpose is to provide a seat that is comfortable.

【０００９】[0009]

【課題を解決するための手段】前記目的を達成するた
め、本発明では、椅子における座体の前部を支持基枠に
支持し、該支持基枠に上下回動可能に枢支されて後方に
延び、且つ背もたれ部の背面側に延びる側面視略Ｌ字状
の梃杆の支持部に、前記座体の後部を支持する後座受体
を前後動自在に支持させ、弾力付勢手段にて前記梃杆を
起立方向に付勢するように構成し、前記背もたれ部へも
たれ掛ける荷重により梃杆が後傾するとき、座体上の着
座者における転子点を中心として前記背もたれ部を回動
させる第１連動機構を、前記梃杆と支持基枠とに関連さ
せて設ける一方、後傾時の着座者の座骨の回動に応じて
前記後座受体を前記梃杆の支持部に沿わせて前方に移動
させる第２連動機構を、前記第１連動機構または梃杆
に、その動きと連動するように連結したものである。In order to achieve the above object, according to the present invention, a front portion of a seat in a chair is provided on a support base frame.
Supporting, said the support base frame is vertically rotatably pivoted extends rearward, and the support portion of the side view L-shaped Teko杆extending on the rear side of the backrest, supporting the rear portion of the seat body Back seat receiver
To be able to move back and forth freely, and the lever is
A first interlocking mechanism configured to urge the backrest portion around a trochanter point of a seated person on the seat when the lever leans backward due to a load leaning on the backrest portion; A mechanism is provided in association with the lever and the support base frame, while the rear seat receiver is moved forward along the lever support portion in accordance with the rotation of the seated bone of the occupant when leaning backward. A second interlocking mechanism to be moved is connected to the first interlocking mechanism or lever so as to interlock with the movement.

【００１０】[0010]

【実施例】次に本発明を具体化した実施例について説明
する。図２〜図５は第１実施例の椅子を示し、椅子の脚
体１上端には、上面及び後方を開放した箱状の支持基枠
２を固定する。側面視Ｌ字状の左右一対の梃杆３，３
は、その各水平部３ａの前部を支持基枠２に支軸４を介
して上下回動可能に枢支し、水平部３ａの後部を前記支
持基枠２の後方に延長し、水平部３ａの後端から上向き
に延びる支柱部３ｂの前方には、後述する背もたれ部５
を配置する。Next, an embodiment of the present invention will be described. FIGS. 2 to 5 show a chair according to a first embodiment. A box-shaped support base frame 2 having an upper surface and an open rear is fixed to the upper end of a leg 1 of the chair. L-shaped pair of left and right levers 3, 3 in side view
The front part of each horizontal part 3a is pivotally supported on the support base frame 2 via the support shaft 4 so as to be vertically rotatable, and the rear part of the horizontal part 3a is extended rearward of the support base frame 2, In front of the support 3b extending upward from the rear end of the support 3a, a backrest 5 described later is provided.
Place.

【００１１】前記支持基枠２の前部内側には、ピン６を
中心に上下回動する押圧レバー７を後向きに設け、該押
圧レバー７の先端を、前記一対の梃杆３，３の前部上面
の接当部８に接当させ、且つコイルバネ、またはガスス
プリング等からなる付勢力強弱調節可能な付勢手段９に
て、押圧レバー７を介して梃杆３の支柱部３ｂが略垂直
状の起立状態となるように付勢する。On the inner side of the front portion of the support base frame 2, a pressing lever 7 that rotates vertically around a pin 6 is provided rearward, and the tip of the pressing lever 7 is connected to the front of the pair of levers 3, 3. The supporting portion 3b of the lever 3 is substantially vertical through the pressing lever 7 by the urging means 9 which comes into contact with the contacting portion 8 on the upper surface of the unit and which can adjust the urging force such as a coil spring or a gas spring. It is urged to be in a standing state.

【００１２】図２の一点鎖線で示すクッション性を有す
る座体１０の前部は、支持基枠２の上面前部の前支持板
１１にて支持される。該座体１０の後部は、後座受体１
２に取付く。そして、前記一対の梃杆３，３の水平部３
ａ，３ａにわたって立設する後支持板１３にスライダ１
４を介して前後移動のみ可能に装着されている。背もた
れ部５は、本実施例では着座者Ｍの背中及び腰椎を支持
するようなシェル状に形成されている。The front portion of the cushioning seat 10 shown by the dashed line in FIG. 2 is supported by the front support plate 11 at the front of the upper surface of the support base frame 2. The rear part of the seat body 10 is
Attach to 2. And the horizontal portion 3 of the pair of levers 3
a, the slider 1
4 so that it can be moved only forward and backward. In this embodiment, the backrest 5 is formed in a shell shape that supports the back and the lumbar spine of the seated person M.

【００１３】次に、前記背もたれ部５へもたれ掛ける荷
重により梃杆３が後傾するとき、座体１０上の着座者Ｍ
における転子点Ｔを中心として前記背もたれ部５を回動
させる第１連動機構１５と、後傾時の着座者の座骨の回
動に応じて前記後座受体１２を前記梃杆３の後支持板１
３に沿わせて前方に移動させる第２連動機構１６につい
て説明する。Next, when the lever 3 leans backward due to the load leaning on the backrest 5, the occupant M on the seat 10
And a first interlocking mechanism 15 for rotating the backrest 5 around the trochanter point T, and the rear seat receiving body 12 is moved to the rear of the lever 3 in accordance with the rotation of the seat bone of the occupant when leaning backward. Support plate 1
The second interlocking mechanism 16 that moves forward along 3 will be described.

【００１４】まず、第１連動機構１６において、背もた
れ部５に後向きに取付く左右一対の上ブラケット１７，
１７には、上下に長い円弧状の第１案内溝１８を有し、
左右梃杆３，３の支柱部３ｂ，３ｂ上端部に横向きに突
出する第１ピン１９，１９を前記第１案内溝１８，１８
に嵌挿する。側面視Ｌ字状の左右一対の第１リンク２０
の中途部を梃杆３，３の支柱部３ｂの下部に固定した第
２ピン２１に回動自在に枢着させる。First, in the first interlocking mechanism 16, a pair of left and right upper brackets 17, which are attached rearward to the backrest 5,
17 has an arc-shaped first guide groove 18 which is long vertically.
The first pins 19, 19 projecting laterally from the upper end portions of the support portions 3b, 3b of the left and right levers 3, 3 are connected to the first guide grooves 18, 18, respectively.
Insert into. A pair of left and right first links 20 that are L-shaped in side view
Is pivotally attached to a second pin 21 fixed to a lower portion of the column 3b of the levers 3, 3.

【００１５】この左右対の第１リンク２０，２０の先端
部と中途とに上下一対の上下長穴２２，２３を穿設し、
これらの長穴２２，２３に挿通する第３ピン２４，第４
ピン２５は第２リンク２６に取付いて一体的に移動でき
るものである。そして、背もたれ部５の下部に後向きに
取付く左右一対の下ブラケット２７，２７に、前記第３
ピン２４の左右両端部を回動自在に枢支する。前記第４
ピン２５の左右両端部は、左右両梃杆３，３における支
柱部３ｂ，３ｂから前向きにそれぞれ突出する側面視三
角状の支持ブラケット２８に穿設した下向き凸円弧状の
第２案内溝２９に挿通させる。A pair of upper and lower holes 22 and 23 are formed at the ends of the left and right pairs of first links 20 and 20 in the middle.
The third pin 24 and the fourth pin
The pin 25 is attached to the second link 26 and can move integrally. Then, the lower bracket 27, 27, which is attached to the lower part of the backrest 5 rearward,
The left and right ends of the pin 24 are pivotally supported. The fourth
The left and right ends of the pin 25 are respectively formed in downwardly projecting circular arc-shaped second guide grooves 29 formed in a support bracket 28 having a triangular shape in a side view that protrudes forward from the columns 3b, 3b of the left and right levers 3, 3, respectively. Insert it.

【００１６】前記左右両第１リンク２０，２０の下端に
横向きに突出させた第５ピン３０に短い第３リンク３１
を連結し、この第３リンクの下端と、左右対の長い第４
リンク３２，３２の上端とを第６ピン３３にて連結す
る。一対の第４リンク３２，３２の上下中途部は、左右
両梃杆３，３の水平部に枢支した枢支軸３４に回動自在
に支持されており、一対の第４リンク３２，３２の下端
を前記支持基枠２に後向きに突出するブラケット３５に
前後長手に形成した第３案内溝３６に摺動ピン３７を介
して前後摺動自在に軸支する。なお、補助ばね３８は、
梃杆３の支柱部３ｂと第３ピン２４等との間に装架し、
支柱部３ｂが起立状態に復帰するとき、背もたれ部５も
起立状態（元の姿勢）に復帰させるためのものである
が、前記各リンクが機械的ロスが少なく円滑に動く場合
には不要である。A short third link 31 is connected to a fifth pin 30 projecting laterally from the lower ends of the left and right first links 20, 20.
And a lower end of the third link and a fourth pair of left and right
The upper ends of the links 32, 32 are connected by a sixth pin 33. The upper and lower middle portions of the pair of fourth links 32, 32 are rotatably supported by a pivot shaft 34 pivotally supported by the horizontal portions of the left and right levers 3, 3, and the pair of fourth links 32, 32 are rotatable. The lower end is pivotally supported via a slide pin 37 in a third guide groove 36 formed longitudinally in a bracket 35 projecting rearward from the support base frame 2 via a slide pin 37. The auxiliary spring 38 is
Mounted between the column 3b of the lever 3 and the third pin 24,
When the support portion 3b returns to the upright state, the backrest portion 5 is also used to return to the upright state (the original posture). However, this is not necessary when the links move smoothly with little mechanical loss. .

【００１７】この第１連動機構１５にて、座体１０に着
座者Ｍが背もたれ部５にもたれ掛けることにより、付勢
手段９の付勢力に抗して梃杆３の支柱部３ｂが支軸４を
中心に後傾回動すると、この動きに応じて、背もたれ部
５は、着座者Ｍの転子点Ｔを中心にして回動する。即
ち、図５に示すように、左右一対の梃杆３，３の水平部
３ａ，３ａの後部が下向きに回動すると、第４リンク３
２の下端の摺動ピン３７は支持基枠２における第３案内
溝３６に沿って椅子の前方向に移動する。この動きに応
じて第４リンク３２、第３リンク３１を介して第１リン
ク２０は、第２ピン２１を中心にして前向きに回動す
る。The first interlocking mechanism 15 causes the occupant M to lean against the backrest 5 against the seat body 10, thereby causing the support 3 b of the lever 3 to pivot against the urging force of the urging means 9. When the backrest pivots around the back 4, the backrest 5 pivots about the trochanter point T of the seated person M in response to this movement. That is, as shown in FIG. 5, when the rear portions of the horizontal portions 3a, 3a of the pair of left and right levers 3, 3 turn downward, the fourth link 3
The sliding pin 37 at the lower end of 2 moves forward in the chair along the third guide groove 36 in the support base frame 2. In response to this movement, the first link 20 rotates forward about the second pin 21 via the fourth link 32 and the third link 31.

【００１８】このとき、梃杆３の支柱部３ｂに設けたブ
ラケット３５における下向き凸円弧状の第２案内溝２９
に沿うように第４ピン２５が移動する。背もたれ部５に
おける下ブラケット２７を、第２リンク２６にて連結さ
れて第４ピン２５と一体的に動く第３ピン２４を介し
て、下向きに引き寄せる。背もたれ部５の上ブラケット
１７は支柱部３ｂの第２ピン１９は第１案内溝１８とに
より所定の軌跡を描いて下降する。At this time, the downwardly projecting circular arc-shaped second guide groove 29 in the bracket 35 provided on the column 3b of the lever 3 is provided.
The fourth pin 25 moves so as to follow. The lower bracket 27 of the backrest 5 is pulled downward via a third pin 24 that is connected by a second link 26 and moves integrally with the fourth pin 25. The upper bracket 17 of the backrest 5 descends along the first trajectory 18 with the second pin 19 of the support 3b.

【００１９】これにより、梃杆３は姿勢固定的な支持基
枠２の支軸４を中心に後傾回動するが、第１連動機構１
５における前記第２案内溝２９の形状にて修正されて、
背もたれ部５は着座者Ｍの転子点Ｔを中心にして回動す
ることができる。次に、第２連動機構１６について説明
する。前記左右一対の梃杆３，３における水平部ａ，３
ａに取付く枢支軸３４に、側面視「く」字状の左右一対
の第５リンク３９，３９のそれぞれの下端を回動自在に
枢支する。各第５リンク３９の上部側に長手の第４案内
溝４０を形成し、該第４案内溝４０に、前記左右一対の
第１リンク２０の中途部に枢着した第７ピン４１を挿通
する一方、左右両第５リンク３９の中途部に横向きに連
結した第８ピン４２を、後座受体１２の後端に取付く左
右一対のブラケット４３，４３の各上下長穴４４，４４
に挿通する。As a result, the lever 3 pivots backward about the support shaft 4 of the support base frame 2 having a fixed posture.
5, the shape of the second guide groove 29 is modified,
The backrest 5 can rotate around the trochanter point T of the seated person M. Next, the second interlocking mechanism 16 will be described. Horizontal portions a, 3 of the pair of left and right levers 3, 3
The lower ends of a pair of left and right fifth links 39, 39 each having a “U” shape in a side view are pivotally supported on a pivot shaft 34 attached to “a”. A long fourth guide groove 40 is formed on the upper side of each fifth link 39, and a seventh pin 41 pivotally connected to an intermediate portion of the pair of left and right first links 20 is inserted into the fourth guide groove 40. On the other hand, an eighth pin 42 laterally connected to a middle part of the left and right fifth links 39 is attached to the rear end of the rear seat receiver 12, and the upper and lower slots 44, 44 of a pair of left and right brackets 43, 43 are attached.
Through.

【００２０】このように構成すると、梃杆３における水
平部３ｂが下向きに回動するとき、前記第１リンク２０
の上部側が前方向に回動する動きに連動して第５リンク
３９の上部が前方向に回動し、この動きにて、後座受体
１２は後支持板１３に沿って前方に移動する。前記後座
受体１２の前移動と梃杆３の水平部３ｂ自体の下向き移
動との総和により、実施例では、梃杆３が支軸４を中心
に略３０度後傾回動すると、後座受体１２は略３０ミリ
メートル前方に移動すると共に、前記座骨の下端Ｋと座
体１０との接当点箇所で略１０ミリメートル下降するこ
とになる。好ましい実施例では、背もたれ部５の後傾動
（ロッキング）に応じて、後座受体１２が前方に２０〜
３０ミリメートル移動し、且つ下方に略１０ミリメート
ル下降動しつつ後傾するように構成する。また、実施例
では、背もたれ部５の角度２度の後傾に応じて後座受体
１２を角度１度後傾させるように設計してある。With this configuration, when the horizontal portion 3b of the lever 3 rotates downward, the first link 20
The upper side of the fifth link 39 rotates forward in conjunction with the upward rotation of the upper side of the fifth link 39, and the rear seat receiver 12 moves forward along the rear support plate 13 by this movement. . In the embodiment, when the lever 3 is tilted rearward by about 30 degrees about the support shaft 4, the rearward movement of the rear seat receiving body 12 and the downward movement of the horizontal portion 3b itself of the lever 3 causes the rearward movement. The seat receiver 12 moves forward by approximately 30 mm, and descends by approximately 10 mm at the point where the lower end K of the ischium comes into contact with the seat body 10. In a preferred embodiment, the rear seat receiver 12 is moved forward 20 to 20 in accordance with the backward tilting (locking) of the backrest 5.
It is configured to move by 30 mm and to tilt backward while moving downward by approximately 10 mm. Further, in the embodiment, the rear seat receiver 12 is designed to be tilted backward by one degree in accordance with the backward tilt of the backrest part 5 by two degrees.

【００２１】図６から図９は第２実施例を示し、支持基
枠２に対する左右一対の梃杆３，３の支軸４関係及び梃
杆３の支柱部３ｂを起立状態に付勢する付勢手段９、ピ
ン６を中心に上下回動する押圧レバー７等は前記第１実
施例と略同じであるので詳細な説明は省略する。本実施
例における前記背もたれ部５へもたれ掛ける荷重により
梃杆３が後傾するとき、座体１０上の着座者Ｍにおける
転子点Ｔを中心として前記背もたれ部５を回動させる第
１連動機構５０と、後傾時の着座者の座骨の回動に応じ
て前記後座受体１２を前記梃杆３の後支持板１３に沿わ
せて前方に移動させる第２連動機構５１とについて説明
する。FIGS. 6 to 9 show a second embodiment, in which the relation between the support shaft 4 of the pair of left and right levers 3, 3 with respect to the support base frame 2 and the support 3b of the lever 3 are urged to the upright state. The urging means 9 and the pressing lever 7 which pivots up and down around the pin 6 are substantially the same as those in the first embodiment, so that detailed description is omitted. A first interlocking mechanism that rotates the backrest 5 about the trochanter point T of the occupant M on the seat body 10 when the lever 3 leans backward due to the load leaning on the backrest 5 in the present embodiment. 50 and a second interlocking mechanism 51 that moves the rear seat receiving body 12 forward along the rear support plate 13 of the lever 3 in accordance with the rotation of the seated bone of the seated person when leaning backward. .

【００２２】第１連動機構５０は、５つの左右対のリン
クからなる。即ち、左右一対の梃杆３，３における支柱
部３ｂ，３ｂの上部に第１ピン５２にて枢支された側面
視Ｌ字状の第１リンク５３の上部は、着座者Ｍの背中の
曲面に略沿うように形成されたシェル状の背もたれ部５
の後面上部に取付く上ブラケット５４と第２ピン５５に
て枢着されている。The first interlocking mechanism 50 includes five pairs of left and right links. That is, the upper part of the L-shaped first link 53 pivotally supported by the first pin 52 on the upper part of the pillars 3b, 3b of the pair of left and right levers 3, 3 is a curved surface of the back of the seated person M. Shell-shaped back portion 5 formed substantially along the
The upper bracket 54 and the second pin 55 are attached to the upper part of the rear surface.

【００２３】背もたれ部５の後面下部に取付く下ブラケ
ット５６の上下長手の第１案内溝５７を介して側面視略
Ｌ字状の第２リンク５８の上端の第３ピン５９に挿通さ
せる。第２リンク５８の下端を支柱部３ｂ，３ｂの下部
寄り部位に第４ピン６０にて枢支する。また、前記第１
リンク５３と第２リンク５８とを、連結リンク６１と第
５ピン６２、第６ピン６３を介して連動連結する。この
場合、第３ピン５９から第４ピン６０までの長さと、第
５ピン６２から第６ピン６３までの長さが等しく、且つ
第３ピン５９から第５ピン６２までの長さと、第４ピン
６０から第６ピン６３までの長さが等しい側面視平行四
辺形のリンク機構を構成する。A third pin 59 at the upper end of a substantially L-shaped second link 58 in a side view is inserted through a vertically extending first guide groove 57 of a lower bracket 56 to be attached to a lower portion of a rear surface of the backrest 5. The lower end of the second link 58 is pivotally supported by a fourth pin 60 at a position closer to the lower part of the columns 3b. In addition, the first
The link 53 and the second link 58 are linked to each other via the link 61 and the fifth and sixth pins 62 and 63. In this case, the length from the third pin 59 to the fourth pin 60 is equal to the length from the fifth pin 62 to the sixth pin 63, and the length from the third pin 59 to the fifth pin 62 is equal to the fourth pin. A side-view parallelogram link mechanism having the same length from the pin 60 to the sixth pin 63 is configured.

【００２４】次いで、前記第６ピン６３箇所に枢支され
た短い長さの第３リンク６４の下端を上下長手の第４リ
ンク６５と第７ピン６６で枢支する。第４リンク６５の
上下中途部を、第８ピン６７を介して、梃杆３の水平部
３ａの後部寄り部位に枢支する。第４リンク６５の下端
は、支持基枠２の左右側面後部に前後長手に穿設された
第２案内溝６９に対して前後摺動自在に挿通させた摺動
ピン６８にて軸支する。Next, the lower end of the short third link 64 pivotally supported at the sixth pin 63 is pivotally supported by a vertically long fourth link 65 and a seventh pin 66. The up-and-down halfway portion of the fourth link 65 is pivotally supported via a eighth pin 67 to a rearwardly located portion of the horizontal portion 3a of the lever 3. The lower end of the fourth link 65 is pivotally supported by a slide pin 68 that is slidably inserted in a longitudinal direction in a second guide groove 69 formed in the longitudinal direction at the rear of the left and right sides of the support base frame 2.

【００２５】この構成にて、前記背もたれ部５へもたれ
掛ける荷重により、梃杆３が前方の枢支軸４を中心に後
傾回動すると、前記第１連動機構５０における第４リン
ク６５の下端の摺動ピン６８は第２案内溝６９に沿って
前移動し、第４リンク６５の上部側が第８ピン６７を中
心にして後向き回動する。この動きを、第３リンク６
４、連結リンク６１を介して第２リンク５８及び第１リ
ンク５３の回動運動に変換する。そして、これら第２リ
ンク５８及び第１リンク５３の回動にて背もたれ部５
を、座体１０上の着座者Ｍにおける転子点Ｔを中心とし
て回動させるのである。With this configuration, when the lever 3 pivots backward about the front pivot shaft 4 due to the load leaning on the backrest 5, the lower end of the fourth link 65 in the first interlocking mechanism 50. The sliding pin 68 moves forward along the second guide groove 69, and the upper side of the fourth link 65 rotates backward about the eighth pin 67. This movement is called the third link 6
4. The rotation is converted into the rotational movement of the second link 58 and the first link 53 via the connecting link 61. The rotation of the second link 58 and the first link 53 causes the backrest 5 to rotate.
Is rotated about the trochanter point T of the seated person M on the seat body 10.

【００２６】第２連動機構５１における左右一対の第５
リンク７１、７１は、梃杆３の水平部３ａ箇所の枢支軸
７０を中心に回動自在に枢支し、該各第５リンク７１の
下端の第９ピン７３を支持基枠２の中途部側面に穿設し
た第３案内溝７２に前後摺動自在に挿通する。前記左右
一対の梃杆３，３の水平部３ａ，３ａに立設した後支持
板１３に沿わせてスライダ１４を介して前後動自在に支
持された後座受体１２には、左右一対の下向きブラケッ
ト７４，７４を突設し、各下向きブラケット７４に穿設
した上下長手の第４案内溝７５に第１０ピン７６を挿通
させる。A pair of left and right fifth links in the second interlocking mechanism 51
The links 71, 71 pivotably support the pivot shaft 70 at the horizontal portion 3 a of the lever 3 so as to be rotatable, and connect the ninth pin 73 at the lower end of each fifth link 71 to the middle of the support base frame 2. It is slidably inserted in the third guide groove 72 formed in the side surface of the unit. A pair of left and right rear seats 12 supported on a horizontal portion 3a of the pair of left and right levers 3 and 3 so as to be movable back and forth through a slider 14 along a support plate 13 are provided. The downward brackets 74 are protruded, and the tenth pin 76 is inserted into the vertically long fourth guide groove 75 formed in each downward bracket 74.

【００２７】この構成により、左右一対の梃杆３，３が
その前部で支軸４を中心にして後傾下向き回動すると、
これと一体的に動く後支持板１３に前後移動可能に支持
された後座受体１２は、第２連動機構５１における第５
リンク７１の下端が第４案内溝７５に沿って動き、この
動きは第５リンク７１と下向きブラケット７４とを介し
て後座受体１２が前方向に移動する動きに伝達される。With this configuration, when the pair of left and right levers 3, 3 is rotated backward and downward about the support shaft 4 at the front portion thereof,
The rear seat receiver 12 supported by the rear support plate 13 that moves integrally therewith so as to be able to move in the front-rear direction is the fifth interlock mechanism 51.
The lower end of the link 71 moves along the fourth guide groove 75, and this movement is transmitted to the movement of the rear seat receiver 12 moving forward through the fifth link 71 and the downward bracket 74.

【００２８】従って、この実施例においても、前記後座
受体１２の前移動と梃杆３の水平部３ｂ自体の下向き移
動との総和により、梃杆３が支軸４を中心に後傾回動す
ると、後座受体１２は前方に所定距離だけ移動すると共
に、前記座骨の下端Ｋと座体１０との接当点箇所で所定
値だけ下降することになる。これらの値は、前記第１実
施例と同様に設定している。Therefore, also in this embodiment, the lever 3 is tilted rearward about the support shaft 4 by the sum of the forward movement of the rear seat receiver 12 and the downward movement of the horizontal portion 3b itself. When it moves, the rear seat receiver 12 moves forward by a predetermined distance, and at the same time, lowers by a predetermined value at a contact point between the lower end K of the ischium and the seat body 10. These values are set in the same manner as in the first embodiment.

【００２９】なお、前記第２実施例では、後座受体１２
の前端を前座受体７７の後端に屈曲自在に連設し、後座
受体１２の動きを吸収すべく、前支持板１１に対して前
座受体７７を前後動自在に支持せしめているが、前座受
体７７と後座受体１２とを分離させても良いことはいう
までもない。In the second embodiment, the rear seat receiver 12
The front end of the front seat 77 is flexibly connected to the rear end of the front seat receiver 77, and the front seat 77 is supported on the front support plate 11 so as to be able to move back and forth to absorb the movement of the rear seat receiver 12. However, it goes without saying that the front seat receiver 77 and the rear seat receiver 12 may be separated.

【００３０】[0030]

【発明の作用・効果】以上説明したように、本発明で
は、椅子における座体の前部を支持基枠に支持し、該支
持基枠に上下回動可能に枢支されて後方に延び、且つ背
もたれ部の背面側に延びる側面視略Ｌ字状の梃杆の支持
部に、前記座体の後部を支持する後座受体を前後動自在
に支持させ、弾力付勢手段にて前記梃杆を起立方向に付
勢するように構成し、前記背もたれ部へもたれ掛ける荷
重により梃杆が後傾するとき、座体上の着座者における
転子点を中心として前記背もたれ部を回動させる第１連
動機構を、前記梃杆と支持基枠とに関連させて設ける一
方、後傾時の着座者の座骨の回動に応じて前記後座受体
を前記梃杆の支持部に沿わせて前方に移動させる第２連
動機構を、前記第１連動機構または梃杆に、その動きと
連動するように連結したものである。これにより、背も
たれ部を後傾させたとき、前記後座受体のみが後傾しつ
つ前記梃杆の支持部に沿わせて前方に移動するので、前
記転子点の位置が、背もたれ部及び座体の両者に対して
ずれない。換言すると、背もたれ部及び座体の両者が後
傾する前と後とで転子点の位置が変位しない。As described above, according to the present invention, the front part of the seat body of the chair is supported by the support base frame , and is supported by the support base frame so as to be vertically rotatable and extends rearward. And support of a substantially L-shaped lever in a side view extending to the back side of the backrest portion.
The rear seat receiver that supports the rear part of the seat body can be moved back and forth
The lever in the upright direction by elastic biasing means.
A first interlocking mechanism that rotates the backrest about a trochanter point of a seated person on the seat when the lever leans backward due to a load leaning on the backrest. A second mechanism for moving the rear seat receiver forward along the lever support portion in accordance with the rotation of the seat bone of the occupant when tilting rearward while providing the lever in association with the lever and the support base frame; An interlocking mechanism is connected to the first interlocking mechanism or lever so as to interlock with its movement. As a result, even the back
When the leaning portion is tilted rearward, only the rear seat receiver is tilted rearward.
Since it moves forward along the support portion of the lever, the position of the trochanter point does not shift with respect to both the backrest portion and the seat body. In other words, the position of the trochanter point does not change before and after the backrest and the seat body both tilt backward.

【００３１】従って、本発明では、座体と背もたれ部と
が後傾時に連動するような椅子においても、椅子の座体
に着座する人の上半身が起立状態から後傾状態に移行す
るとき、着座者のワイシャツや上衣が接する背もたれ部
により捲り上げられたり、座体に接するズボンの上部が
引っ張られる等の不都合がなくなり、且つ座り心地も良
好となる、という人間工学的に優れた椅子を提供するこ
とができるのである。Therefore, according to the present invention, even in a chair in which the seat body and the backrest are interlocked with each other when the seat is tilted backward, when the upper body of the person sitting on the seat body of the chair shifts from the standing state to the rearward tilting state, the seating is performed. The present invention provides an ergonomically excellent chair that eliminates inconveniences such as being turned up by a backrest part in contact with a shirt and an upper garment of an elderly person and pulling up the upper part of pants in contact with a seat body, and having good sitting comfort. You can do it.

【図面の簡単な説明】[Brief description of the drawings]

【図１】着座者の上半身の起立状態と後傾状態とで、着
座者の骨盤と、椅子の座体及び背もたれ部とに対する位
置関係の変化を示す側面説明図である。FIG. 1 is an explanatory side view showing a change in a positional relationship between a pelvis of a seated person, a seat body and a backrest of a chair when the seated person's upper body is in an upright state and a rearwardly inclined state.

【図２】第１実施例の椅子の側断面図である。FIG. 2 is a side sectional view of the chair of the first embodiment.

【図３】図２の III−III 矢視背面図である。FIG. 3 is a rear view as viewed in the direction of arrows III-III in FIG. 2;

【図４】第１実施例の部品の斜視図である。FIG. 4 is a perspective view of a component of the first embodiment.

【図５】後傾状態の側面図である。FIG. 5 is a side view of a rearwardly inclined state.

【図６】図７のVI−VI矢視で示す第２実施例の椅子の側
断面図である。FIG. 6 is a side sectional view of the chair according to the second embodiment, as viewed in the direction of arrows VI-VI in FIG. 7;

【図７】図６のVII −VII 矢視背面図である。FIG. 7 is a rear view taken along the line VII-VII in FIG. 6;

【図８】各部品の斜視図である。FIG. 8 is a perspective view of each component.

【図９】後傾状態の側断面図である。FIG. 9 is a side sectional view in a backward tilt state.

【符号の説明】 ２ 支持基枠 ３，３ 梃杆 ３ａ 水平部 ３ｂ 支柱部 ４ 支軸 ５ 背もたれ部 ９ 付勢手段 １０ 座体 １２ 後座受体 １３ 後支持板 １５，５０ 第１連動機構 １６，５１ 第２連動機構 ３９，７１ 第５リンク ７７ 前座受体DESCRIPTION OF SYMBOLS 2 support base frame 3, 3 lever 3 a horizontal part 3 b support part 4 support shaft 5 backrest part 9 urging means 10 seat body 12 rear seat receiver 13 rear support plate 15, 50 first interlocking mechanism 16 , 51 Second interlocking mechanism 39, 71 Fifth link 77 Front seat receiver

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−139013（ＪＰ，Ａ) 特開 平３−60607（ＪＰ，Ａ) 実開 平３−79741（ＪＰ，Ｕ) 実開 昭61−207257（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) A47C 3/026 A47C 7/14 A47C 7/44 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-139013 (JP, A) JP-A-3-60607 (JP, A) JP-A-3-79741 (JP, U) JP-A-61-1 207257 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 3/026 A47C 7/14 A47C 7/44

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】椅子における座体の前部を支持基枠に支持
し、該支持基枠に上下回動可能に枢支されて後方に延
び、且つ背もたれ部の背面側に延びる側面視略Ｌ字状の
梃杆の支持部に、前記座体の後部を支持する後座受体を
前後動自在に支持させ、弾力付勢手段にて前記梃杆を起
立方向に付勢するように構成し、前記背もたれ部へもた
れ掛ける荷重により梃杆が後傾するとき、座体上の着座
者における転子点を中心として前記背もたれ部を回動さ
せる第１連動機構を、前記梃杆と支持基枠とに関連させ
て設ける一方、後傾時の着座者の座骨の回動に応じて前
記後座受体を前記梃杆の支持部に沿わせて前方に移動さ
せる第２連動機構を、前記第１連動機構または梃杆に、
その動きと連動するように連結したことを特徴とする椅
子。1. A front part of a seat in a chair is supported by a support base frame.
And extends rearward is vertically rotatably pivoted to the support base frame, and the support of the Teko杆side substantially L-shape extending to the rear side of the backrest, for supporting the rear portion of the seat body The back seat receiver
It is supported to be able to move back and forth, and the lever is raised by the elastic biasing means.
A first interlocking mechanism configured to be urged in a vertical direction, and to rotate the backrest about a trochanter point of a seated person on the seat when the lever leans backward due to a load leaning on the backrest; A mechanism is provided in association with the lever and the support base frame, while the rear seat receiver is moved forward along the lever support portion in accordance with the rotation of the seated bone of the occupant when leaning backward. Moving the second interlocking mechanism to the first interlocking mechanism or lever,
A chair characterized by being linked so as to interlock with the movement.