JP3644518B2 - Chair - Google Patents

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Publication number
JP3644518B2
JP3644518B2 JP34395396A JP34395396A JP3644518B2 JP 3644518 B2 JP3644518 B2 JP 3644518B2 JP 34395396 A JP34395396 A JP 34395396A JP 34395396 A JP34395396 A JP 34395396A JP 3644518 B2 JP3644518 B2 JP 3644518B2
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Japan
Prior art keywords
pivot shaft
bearing
support frame
seat
pivot
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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 - Fee Related
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JP34395396A
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Japanese (ja)
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JPH10179311A (en
Inventor
裕 竹内
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株式会社イトーキクレビオ
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Priority to JP34395396A priority Critical patent/JP3644518B2/en
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  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、座体又は背もたれの初期姿勢を調節できるようにした姿勢調節装置を備えた椅子に関するものである。
【0002】
【従来の技術・発明が解決しようとする課題】
椅子において、背もたれや座体がばねに抗して後傾動し得るように構成していることは、特段の説明を要するまでもなく周知の通りである。しかし、従来の椅子は、人が背もたれにもたれ掛かったときに、背もたれのみ又は背もたれと座体とがばねに抗して後傾動するように設定しているに過ぎない。換言すると、座体や背もたれの初期姿勢(側面視での角度)は一定であった。
【0003】
このために、例えば座体が背もたれに連動して後傾動する椅子の場合、人によっては、背もたれにもたれ掛かったロッキング状態で座体の先端部で大腿部が突き上げられる現象が生じることがあった。また、人が背もたれにもたれ掛かっていない初期状態での座体又は背もたれの初期姿勢も人の好みによって相違するが、従来の椅子では座体及び背もたれの初期姿勢は一定であったため、人の好みの違いに対応できない問題があった。
【0004】
本発明は、これらの問題を解消することを目的とするものである。
【0005】
【課題を解決するための手段】
この目的を達成するため本願発明は、脚体の上端に設けた支持フレームと、座体と、背もたれが取付く傾動体とを備えており、前記支持フレームの前部に、第1枢支軸によって座体を後傾動自在に枢支する一方、座体の後部に、前記傾動体の前後中途部位に貫通した第2枢支軸を嵌め込み、更に、傾動体の前端部を、支持フレームに対して略前後方向に移動自在で上向き抜け不能に係合した3枢支軸に係着し、第3枢支軸を前方からばねで支持している椅子において、第2枢支軸を支持するために座体に回転自在に設けた軸受けに第2枢支軸を偏心した状態で嵌め込むか、又は、第1枢支軸を支持するために支持フレームに回転自在に設けた軸受けに第1枢支軸を偏心した状態で嵌め込み、前記軸受けには、当該軸受けを回転操作するためのレバー又はハンドルを設け、軸受けの回転操作によって第2枢支軸又は第1枢支軸の高さが高低変化するように設定している。
【0006】
第2枢支軸を軸受けに偏心した状態で嵌め込むと、座体と背もたれとの両方の初期姿勢を調節することができ、また、第1枢支軸を軸受けに偏心した状態で嵌め込むと、座体の みの初期姿勢を調節できる。
【0007】
【0008】
【0009】
【0010】
【発明の奏する効果】
本願発明では、前記したように、レバーを手で持って軸受けを回転操作すると、当該軸受けで支持された枢支軸の高さが変化するため、軸受けに嵌まった枢支軸で支持された傾動体若しくはこれと座体との両方の初期姿勢(側面視での姿勢)が変化する。
【0011】
従って、本願発明によると、座体や背もたれの初期姿勢をユーザーの体格や好みに応じて調節することができるから、1種類の椅子で、ユーザーの個人差に応じた座り心地を実現できる効果を有する。
【0012】
特に、第2枢支軸を軸受けに偏心した状態で嵌め込むと、ごく簡単な構成によって座体と背もたれとの初期姿勢を同時に変更できる利点がある。
【0013】
【0014】
【発明の実施形態】
次に、本願発明の実施形態を図面に基づいて説明する。
【0015】
図1〜4は第1実施形態であり、このうち図1は椅子の縦断側面図、図2は図1のII−II視平面図、図3は要部の分離斜視図、図4は作用を示す図である。
【0016】
椅子は、ガスシリンダ等の脚体1の上端に固着した支持フレーム2と、その上方に配置した座体3と、後傾動自在な背もたれ4とを備えている。支持フレーム2は正断面略上向き開口コ字状に形成されている。他方、座体3の下面には正面視略下向き開口コ字状の座受け体5が固着されており、座受け体5の前端部の側板5aと支持フレーム2の側板2aの前端部とを第1枢支軸(前枢支軸)6によって枢支している。従って座体3は第1枢支軸6を中心にして後傾動し得る。
【0017】
前記背もたれ4は側面視で略L字状に形成した傾動体7に取付けており、傾動体7のうち水平部の前後中途部位と前記座受け体5の左右側板5aとを第2枢支軸(後枢支軸)8によって枢支している。傾動体7は支持フレーム2の外側に位置しており、左右傾動体7の先端間に、支持フレーム2の側板2aに貫通した第3軸9を装架している。
【0018】
前記第3枢支軸9は、支持フレーム2の左右側板2aに側面視で緩い角度で後傾状に延びるように形成したガイド穴10に摺動自在に嵌まっている。また、第1枢支軸6と第3枢支軸9とにはそれぞれ前後ばね受け11,12 が被嵌しており、両ばね受け11,12 の間に圧縮ばね13を装架している。従って、背もたれ4及び座体3は圧縮ばね13に抗して一緒に後傾動する。第3枢支軸9は前方に移動しつつ傾動体7が後傾するため、座体3の後傾の度合いよりも背もたれ4の後傾の度合いが大きい。
【0019】
なお、圧縮ばね13は、単に着座しただけでは変形せず、背もたれ4にもたれ掛かって傾動体7に大きなモーメントが作用すると始めて変形するような硬さに設定している。また
、後ばね受け12は、支持フレーム2に固着したガイド筒14に摺動自在に嵌挿している。
【0020】
そして、前記第2枢支軸8によって傾動体7と座受け体5とを枢支するにおいて、傾動体7を座受け体5の内側に配置し、座受け体5の左右側板5aにそれぞれ軸受け15,16 を回転自在に嵌挿し、この軸受け15,16 に、前記第2枢支軸8を、その軸心17を軸受け15,16 の軸心18に対して若干の寸法Eだけ偏心させた状態で嵌挿している。第2枢支軸8は軸受け15,16 に回転自在に嵌めても良いし、軸受け15,16 に固着しても良い。
【0021】
前記左右軸受け15,16 のうち一方の軸受け15を座受け体5の側方に向けて長く延長し、その先端に、半径外向きに延びるレバー19を突設している。従って、レバー19を手で持って両軸受け15,16 を略180 度程度回転させることにより、図1のように第2枢支軸8が軸受け15,16 の軸心18の上方に位置した高位置と、図4(A)のように第2枢支軸8が軸受け15,16 の軸心18よりも下方に位置した低位置との2段階に切り換えることができる。
【0022】
図3や図4(B)に示すように、一方の軸受け15の基端に半径外向きの突起20を設ける一方、座受け体5の側板5aには左右一対のストッパー21を切り起こし形成しており、突起20を左右ストッパー21に当てることにより、軸受け15,16 の回転姿勢を規制するようにしている(図4(B)も参照)。
【0023】
上記の説明より明らかなように、椅子のユーザーはレバー19を手で持って軸受け15,16 を回転することにより、座体3及び背もたれ4の初期姿勢を自分の体格や好みに応じて変更することができる。すなわち、座体3が水平面に対して成す初期角度θと背もたれ4の初期角度とを同時に2段階に変更できる。
【0024】
実施形態のように、第2枢支軸8を高位置に調節した状態で第2枢支軸8が軸受け15,16 の軸心18の真上に位置するように設定すると、背もたれ4の後傾動によって第2枢支軸8に荷重が作用したときに、その荷重の作用線が軸受けの軸心18と第2枢支軸8との軸心17とを結ぶ線と重なるため、背もたれ荷重が軸受け15,16 を回転させるモーメントして作用することはなく、従って、軸受け15,16 を固定するロック手段を設ける必要がない利点がある。
【0025】
もとより、軸受け15,16 を調節した位置に固定するロック手段を設けても良いのであり、このようにすると3段階以上に調節できる。なお、第2枢支軸8は軸受け15に一体に形成しても良く、この形態も請求項に含まれる。また、着座した状態でレバー19を操作することもできる。
【0026】
【0027】
に示第2実施形態、座体3の姿勢を変更できるようにしたものであるが、この実施形態では、支持フレーム2の前端部に軸受け15,16 を回転自在に装着して、この軸受け15,16 に、座体3の前部が取付く第1枢支軸(前枢支軸)6を偏心した状態で嵌め込む一方、座体3の後部は第2枢支軸(後枢支軸)8によって支持フレーム2に回動自在に枢支している。この場合、傾動体7も第2枢支軸8によって支持フレーム2に枢支している。また、軸受け15,16 は円板状のハンドル22で回転操作するようにしている。
【0028】
なお、図6(B)に示すように、第1枢支軸6が嵌まる座受け体5のピン穴23を前後方向に延びる長穴に形成することにより、軸受け15,16 の回転を許容できるようにしている(図5の場合も同様である)。
【0029】
【0030】
【図面の簡単な説明】
【図1】第1実施形態に係る椅子の縦断側面図である。
【図2】図1のII−II視平面図である。
【図3】(A)(B)とも要部の分離斜視図である。
【図4】作用を示す図である。
【図5】第2実施形態の概略図である。
【符号の説明】
2 支持フレーム
3 座体
4 背もたれ
5 座受け体
6 第1枢支軸(前枢支軸)
7 傾動体
8 第2枢支軸(後枢支軸)
9 第3枢支軸
13 ばね
15,16 軸受け
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair provided with a posture adjusting device that can adjust an initial posture of a seat or a backrest.
[0002]
[Prior art / problems to be solved by the invention]
It is well known that the backrest and the seat body of the chair can be tilted rearward against the spring, without needing any special explanation. However, in the conventional chair, when the person leans against the backrest, only the backrest or the backrest and the seat body are set to tilt backward against the spring. In other words, the initial posture (angle in the side view) of the seat and the backrest is constant.
[0003]
For this reason, for example, in the case of a chair that tilts backward in conjunction with the backrest, depending on the person, a phenomenon may occur in which the thigh is pushed up at the front end of the seating body in a locked state leaning against the backrest. It was. In addition, the initial posture of the seat or back in the initial state where the person does not rest on the back is also different depending on the preference of the person, but in the conventional chair, the initial posture of the seat and the back is constant. There was a problem that could not cope with the difference.
[0004]
The present invention aims to solve these problems.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the present invention comprises a support frame provided at the upper end of a leg, a seat, and a tilting body to which a backrest is attached, and a first pivot shaft is provided at the front of the support frame. The seat body is pivotally supported by a rear tilting mechanism, while a second pivot shaft penetrating through the front and rear middle parts of the tilting body is fitted in the rear part of the tilting body, and the front end portion of the tilting body is attached to the support frame. In order to support the second pivot shaft in a chair that is engaged with the three pivot shafts that are movable substantially in the front-rear direction and that cannot be removed upward, and that supports the third pivot shaft with a spring from the front. The second pivot shaft is fitted in an eccentric manner on a bearing provided rotatably on the seat body, or the first pivot is mounted on a bearing provided rotatably on a support frame to support the first pivot shaft. The support shaft is fitted in an eccentric state, and the bearing is used to rotate the bearing. The bar or handle provided, the height of the second pivot shaft or the first pivot shaft is set to change height by rotating operation of the bearing.
[0006]
When the second pivot shaft is fitted to the bearing in an eccentric state, the initial posture of both the seat and the backrest can be adjusted, and when the first pivot shaft is fitted to the bearing in an eccentric state , you can adjust the Mino initial attitude of the seat body.
[0007]
[0008]
[0009]
[0010]
[Effects of the invention]
In the present invention , as described above, when the bearing is rotated by holding the lever by hand, the height of the pivot shaft supported by the bearing changes, so that the pivot shaft supported by the bearing is supported by the pivot shaft. The initial posture (postural view) of the tilting body or both of the tilting body and the sitting body changes.
[0011]
Therefore, according to the present gun invention, since it is possible to adjust in accordance with the initial attitude of the seat support and the backrest to the user's physique or preferences, 1 type of chair, effects that can achieve comfort in accordance with the individual differences of the user Have
[0012]
In particular, when fitted in a state in which eccentric the second pivot shaft to the bearing, there is an advantage that can change the initial orientation of the seat body and the back simultaneously by posterior segment simple configuration.
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0015]
1 to 4 show a first embodiment, in which FIG. 1 is a longitudinal side view of a chair, FIG. 2 is a plan view taken along the line II-II in FIG. 1, FIG. FIG.
[0016]
The chair includes a support frame 2 fixed to the upper end of a leg 1 such as a gas cylinder, a seat 3 disposed above the support frame 2, and a backrest 4 that can be tilted rearward. The support frame 2 is formed in a U-shape with an opening that is substantially upward in the front section. On the other hand, a seat receiving body 5 having a substantially U-shaped opening facing the front is fixed to the lower surface of the seat body 3, and the side plate 5a at the front end of the seat receiving body 5 and the front end of the side plate 2a of the support frame 2 are connected. The first pivot shaft (front pivot shaft) 6 is pivotally supported. Accordingly, the seat body 3 can tilt backward about the first pivot shaft 6.
[0017]
The backrest 4 is attached to a tilting body 7 formed in a substantially L shape in a side view, and a second pivotal shaft is formed by connecting the front and rear halfway parts of the horizontal portion of the tilting body 7 and the left and right side plates 5a of the seat receiving body 5. (Back pivot) 8 is pivotally supported. The tilting body 7 is located outside the support frame 2, and a third shaft 9 penetrating the side plate 2 a of the support frame 2 is mounted between the tips of the left and right tilting bodies 7.
[0018]
The third pivot shaft 9 is slidably fitted into a guide hole 10 formed on the left and right side plates 2a of the support frame 2 so as to extend rearwardly at a gentle angle in side view. Further, front and rear spring receivers 11 and 12 are fitted on the first pivot shaft 6 and the third pivot shaft 9, respectively, and a compression spring 13 is mounted between the spring receivers 11 and 12. . Therefore, the backrest 4 and the seat body 3 tilt backward together against the compression spring 13. Since the tilting body 7 tilts backward while the third pivot 9 moves forward, the degree of backward tilt of the backrest 4 is greater than the degree of backward tilt of the seat body 3.
[0019]
The compression spring 13 is set to such a hardness that it does not deform when it is simply seated, but only deforms when it leans against the backrest 4 and a large moment acts on the tilting body 7. Further, the rear spring receiver 12 is slidably fitted into a guide cylinder 14 fixed to the support frame 2.
[0020]
When the tilting body 7 and the seat receiving body 5 are pivotally supported by the second pivot shaft 8, the tilting body 7 is disposed inside the seat receiving body 5, and the bearings are respectively mounted on the left and right side plates 5 a of the seat receiving body 5. 15 and 16 are rotatably inserted, and the second pivot shaft 8 is eccentric to the bearings 15 and 16 by a slight dimension E with respect to the shaft center 17 of the bearings 15 and 16. It is inserted in the state. The second pivot shaft 8 may be rotatably fitted to the bearings 15 and 16 or may be fixed to the bearings 15 and 16.
[0021]
One of the left and right bearings 15, 16 is extended long toward the side of the seat receiving body 5, and a lever 19 extending radially outward is projected from the tip. Accordingly, by holding the lever 19 by hand and rotating the bearings 15 and 16 by about 180 degrees, the second pivot shaft 8 is positioned above the shaft center 18 of the bearings 15 and 16 as shown in FIG. As shown in FIG. 4A, the second pivot shaft 8 can be switched to two stages, that is, a low position where the second pivot shaft 8 is located below the shaft center 18 of the bearings 15 and 16.
[0022]
As shown in FIGS. 3 and 4B, a radially outward projection 20 is provided at the base end of one bearing 15, while a pair of left and right stoppers 21 are cut and raised on the side plate 5a of the seat receiving body 5. The projection 20 is applied to the left and right stoppers 21 to restrict the rotational posture of the bearings 15 and 16 (see also FIG. 4B).
[0023]
As is clear from the above description, the chair user changes the initial posture of the seat 3 and the backrest 4 according to his / her physique and preference by holding the lever 19 with his hand and rotating the bearings 15 and 16. be able to. That is, the initial angle θ formed by the seat body 3 with respect to the horizontal plane and the initial angle of the backrest 4 can be changed simultaneously in two stages.
[0024]
When the second pivot shaft 8 is set to be positioned directly above the axis 18 of the bearings 15 and 16 with the second pivot shaft 8 adjusted to a high position as in the embodiment, the back of the backrest 4 When a load is applied to the second pivot shaft 8 by tilting, the line of action of the load overlaps the line connecting the shaft center 18 of the bearing and the shaft center 17 of the second pivot shaft 8, so that the backrest load is It does not act as a moment for rotating the bearings 15 and 16, and therefore there is an advantage that it is not necessary to provide a locking means for fixing the bearings 15 and 16.
[0025]
Of course, lock means for fixing the bearings 15 and 16 to the adjusted positions may be provided, and in this way, the adjustment can be made in three or more stages. The second pivot shaft 8 may be formed integrally with the bearing 15, and this form is also included in the claims. Further, the lever 19 can be operated in a seated state.
[0026]
[0027]
The second embodiment is shown in Fig. 5, but in which A user can change the orientation of the seat body 3, in this embodiment, the front end portion of the support frame 2 by mounting the bearing 15 and 16 rotatably The bearings 15 and 16 are fitted with the first pivot shaft (front pivot shaft) 6 attached to the front portion of the seat body 3 in an eccentric state, while the rear portion of the seat body 3 is fitted with the second pivot shaft ( The support frame 2 is pivotally supported by a rear pivot shaft 8). In this case, the tilting body 7 is also pivotally supported on the support frame 2 by the second pivot shaft 8. The bearings 15 and 16 are rotated by a disk-like handle 22.
[0028]
As shown in FIG. 6B, the bearings 15 and 16 are allowed to rotate by forming the pin hole 23 of the seat receiving body 5 into which the first pivot shaft 6 is fitted into a long hole extending in the front-rear direction. (The same applies to the case of FIG. 5).
[0029]
[0030]
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a chair according to a first embodiment.
FIG. 2 is a plan view taken along the line II-II in FIG.
FIGS. 3A and 3B are separated perspective views of the main part. FIGS.
FIG. 4 is a diagram showing an operation.
FIG. 5 is a schematic view of a second embodiment.
[Explanation of symbols]
2 Support frame 3 Seat body 4 Backrest 5 Seat receiver 6 First pivot (front pivot)
7 Tilting body 8 Second pivot (rear pivot)
9 Third pivot
13 Spring
15,16 bearing

Claims (1)

脚体の上端に設けた支持フレームと、座体と、背もたれが取付く傾動体とを備えており、前記支持フレームの前部に、第1枢支軸によって座体を後傾動自在に枢支する一方、座体の後部に、前記傾動体の前後中途部位に貫通した第2枢支軸を嵌め込み、更に、傾動体の前端部を、支持フレームに対して略前後方向に移動自在で上向き抜け不能に係合した3枢支軸に係着し、第3枢支軸を前方からばねで支持している椅子であって、
第2枢支軸を支持するために座体に回転自在に設けた軸受けに第2枢支軸を偏心した状態で嵌め込むか、又は、第1枢支軸を支持するために支持フレームに回転自在に設けた軸受けに第1枢支軸を偏心した状態で嵌め込み、前記軸受けには、当該軸受けを回転操作するためのレバー又はハンドルを設け、軸受けの回転操作によって第2枢支軸又は第1枢支軸の高さが高低変化するように設定している、
椅子。
A support frame provided at the upper end of the leg body, a seat body, and a tilting body to which the backrest is attached are provided, and the seat body is pivotally supported at the front portion of the support frame by a first pivot shaft so that the seat body can be tilted rearward. On the other hand, the second pivot shaft penetrating through the rear halfway part of the tilting body is fitted in the rear part of the seat body, and the front end of the tilting body can be moved in the front-rear direction with respect to the support frame so as to come out upward. A chair that is engaged with the three pivot shafts that are impossiblely engaged and supports the third pivot shaft with a spring from the front,
The second pivot shaft is fitted in an eccentric manner in a bearing rotatably provided on the seat body to support the second pivot shaft, or the support frame is rotated to support the first pivot shaft. The first pivot shaft is fitted in a freely provided bearing, and a lever or a handle for rotating the bearing is provided in the bearing, and the second pivot shaft or the first pivot shaft is operated by rotating the bearing. The height of the pivot is set to change
Chair.
JP34395396A 1996-12-24 1996-12-24 Chair Expired - Fee Related JP3644518B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34395396A JP3644518B2 (en) 1996-12-24 1996-12-24 Chair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34395396A JP3644518B2 (en) 1996-12-24 1996-12-24 Chair

Publications (2)

Publication Number Publication Date
JPH10179311A JPH10179311A (en) 1998-07-07
JP3644518B2 true JP3644518B2 (en) 2005-04-27

Family

ID=18365518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34395396A Expired - Fee Related JP3644518B2 (en) 1996-12-24 1996-12-24 Chair

Country Status (1)

Country Link
JP (1) JP3644518B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6880886B2 (en) * 2002-09-12 2005-04-19 Steelcase Development Corporation Combined tension and back stop function for seating unit
JP4735804B2 (en) * 2004-12-27 2011-07-27 コクヨ株式会社 Chair with tilt reaction force adjustment device
JP5144943B2 (en) * 2006-08-30 2013-02-13 株式会社イトーキ Chair
CN103976584B (en) * 2014-05-28 2017-01-18 漯河中联食品机械厂 Multifunctional boss chair

Also Published As

Publication number Publication date
JPH10179311A (en) 1998-07-07

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