JPH07155233A - Chair fitted with back-rest - Google Patents
Chair fitted with back-restInfo
- Publication number
- JPH07155233A JPH07155233A JP31028293A JP31028293A JPH07155233A JP H07155233 A JPH07155233 A JP H07155233A JP 31028293 A JP31028293 A JP 31028293A JP 31028293 A JP31028293 A JP 31028293A JP H07155233 A JPH07155233 A JP H07155233A
- Authority
- JP
- Japan
- Prior art keywords
- backrest
- waist
- waist support
- support part
- seat
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、後傾動自在な背もたれ
を備えた椅子に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a backrest which can be tilted rearward.
【０００２】[0002]
【従来の技術】人が背もたれにもたれ掛かった状態で、
人の腰が支持されると、脊髄に対する負担が軽減されて
快適である。そこで、米国特許第４６８５７３３号明細
書には、人が背もたれにもたれ掛かった状態で腰を支持
するための手段として、背もたれを、弾性変形し得る素
材にて背中支持部と腰支持部とを連接した状態に形成
し、背もたれにおける背中支持部を、脚体に後傾動自在
に枢着した側面視Ｌ字状の背支持杆に取付ける一方、腰
支持部を、側面視Ｌ字状に形成したコントロール部材の
上端に取り付け、コントロール部材における水平部の前
端を、背支持部の前端寄り部位に穿設した前後長手の長
孔にピンにて枢支した構成が記載されている。2. Description of the Related Art With a person leaning against a backrest,
When the person's lower back is supported, the burden on the spinal cord is reduced and it is comfortable. Therefore, in U.S. Pat. No. 4,685,733, as a means for supporting a waist in a state where a person leans against a backrest, the backrest and the waist support are connected by a material that can elastically deform. The back support portion of the backrest is attached to the L-shaped back support rod pivotally attached to the leg so as to be tiltable rearward, while the waist support portion is formed in the L-shape side view. It is described that the front end of the horizontal portion of the control member is attached to the upper end of the member, and the front end of the horizontal portion of the control member is pivotally supported by a pin in a long hole in the front-rear longitudinal direction formed in a portion near the front end of the back support portion.
【０００３】つまりこの先行技術は、背もたれを、人の
上半身に密着するように変形させるにおいて、コントロ
ール部材にて腰支持部の前向き突出量を調整するように
したものであった。That is, according to this prior art, when the backrest is deformed so as to be in close contact with the upper half of the body of the person, the amount of forward projection of the waist support portion is adjusted by the control member.
【０００４】[0004]
【発明が解決しようとする課題】しかしこの先行技術
は、背もたれを人の上半身に倣うように変形させるに過
ぎず、腰支持部を素早く突出させることができないた
め、換言すると、人が背もたれに大きくもたれ切った状
態でしか腰が支持されないため、ロッキング状態の快適
さの向上に限度があると言う問題があった。However, this prior art merely deforms the backrest so as to imitate the upper half of the body of the person, and does not allow the waist support to project quickly. In other words, the person has a large backrest. There is a problem that there is a limit to improvement of comfort in the rocking state because the waist is supported only in the leaned state.
【０００５】本発明は、この問題を解消することを目的
とするものである。The present invention aims to solve this problem.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明の請求項１では、「座受け部で支持された座体
と、ばね等の弾性体にて弾性的に支持された状態で後傾
する背もたれとを備え、前記背もたれを、人の背中に対
する背中支持部と腰に対する腰支持部とを連接した形態
に形成し、腰支持部を背中支持部に対して相対的に前向
き突出可能に形成して成る椅子において、」「前記座受
け部に、前記背もたれにおける腰支持部の背面に向けて
延びる固定ガイド体を設け、該固定ガイド体の上端部
に、水平横向きに延びるピンを設ける一方、前記背もた
れにおける腰支持部の背面に、前記固定ガイド体のピン
が嵌まる長溝孔を備えた可動ガイド体を設け、該可動ガ
イド体の長溝孔を、前記ピンとのガイド作用にて腰支持
部を背中支持部に対して相対的に前向き突出させるよう
な形状に形成する」の構成にした。To achieve this object, in claim 1 of the present invention, "a seat body supported by a seat receiving portion and an elastic body such as a spring elastically supported With a backrest that tilts backward, the backrest is formed in a form in which a back support part for a person's back and a waist support part for a waist are connected, and the waist support part can project forward relative to the back support part. In the chair formed as follows, "" the seat receiving portion is provided with a fixed guide body extending toward the back surface of the waist support portion of the backrest, and the upper end portion of the fixed guide body is provided with a horizontally extending pin. On the other hand, a movable guide body provided with a long groove hole into which the pin of the fixed guide body is fitted is provided on the back surface of the waist supporting portion of the backrest, and the long groove hole of the movable guide body is supported by the waist by a guiding action with the pin. Part to the back support part And the configuration of the relatively formed in a shape so as to forward protruding ".
【０００７】また、請求項２では、請求項１と同様の前
提の構成の下で、「前記座受け部に、前記背もたれにお
ける腰支持部の背面に向けて延びる固定ガイド体を設
け、該固定ガイド体の上端部に、ピニオンギヤを、左右
水平状の回転軸回りに回転するように軸支する一方、前
記背もたれにおける腰支持部の背面に、前記ピニオンギ
ヤに噛合するラック歯を設け、且つ、前記ピニオンギヤ
のうち腰支持部におけるラック歯との噛合面を、腰支持
部によるピニオンギヤの回転方向と反対方向に行くに従
って回転中心との間隔が広がるように形成する」の構成
にした。According to a second aspect of the present invention, under the same premise structure as in the first aspect, "the seat receiving portion is provided with a fixed guide body extending toward the back surface of the waist supporting portion of the backrest, and the fixing is performed. At the upper end of the guide body, a pinion gear is pivotally supported so as to rotate about a horizontal rotation axis on the left and right, while a rack tooth that meshes with the pinion gear is provided on the back surface of the waist support portion of the backrest, and In the pinion gear, the meshing surface with the rack tooth in the waist support portion is formed so that the distance from the rotation center increases in the direction opposite to the rotation direction of the pinion gear by the waist support portion.
【０００８】更に請求項３では、同じく請求項１と同様
の前提の構成の下で、「前記腰支持部の背面を、背もた
れの後傾動に連動して強制的に回動するリンク体にて前
向きに押圧するようにする」の構成にした。更に請求項
４では、請求項１と同様の前提の構成の下で、「前記座
受け部又は座体に、前記背中支持部が取付く背支持杆を
後傾動自在に設け、該背支持杆に、前記腰支持部の背面
に沿って延びる支持体を、当該支持体と腰支持部との間
隔が下方に行くに従って狭くなるようにして設け、該支
持体と腰支持部の背面との間に、背中支持部の後傾動に
連動して下向きに引っ張られるようにした押圧体を介挿
する」と言う構成にした。According to a third aspect of the present invention, under the same premise structure as in the first aspect, "the back surface of the waist support portion is a link body forcibly rotating in association with the rearward tilting of the backrest. It should be pushed forward ”. Further, in a fourth aspect, under the same premise structure as in the first aspect, "a back support rod to which the back support portion is attached is provided in the seat receiving portion or the seat body so as to be tiltable rearward, and the back support rod is attached. A support body extending along the back surface of the waist support portion such that the distance between the support body and the waist support portion becomes narrower as it goes downward, and between the support body and the back surface of the waist support portion. In addition, a pressing body that is pulled downward in conjunction with the backward tilting of the back support portion is inserted. "
【０００９】なお、本発明において「腰」とは臀部を含
む概念である。In the present invention, the "waist" is a concept including the buttocks.
【００１０】[0010]
【発明の作用・効果】請求項１の構成において、人が背
もたれにもたれ掛かって背中支持部が後傾すると、可動
ガイド体における長溝孔と固定ガイド体におけるピンと
の強制的なガイド作用により、腰支持部は前向きに押し
出される。また、請求項２においては、人が背もたれに
もたれ掛かって背中支持部が後傾すると、腰支持部は、
ピニオンギヤを回転させながら後傾して行く。この場
合、ピニオンギヤのうちラック歯に対する噛合面と回転
軸心との間隔が下方に行くに従って大きくなるように設
定されているため、ピニオンギヤの回転に連れて、当該
ピニオンギヤと腰支持部との噛合箇所はピニオンギヤの
回転軸心から椅子の前方に向けて遠ざかることになり、
その結果、腰支持部は前向きに素早く突出する。In the structure of claim 1, when a person leans against the backrest and the back support part tilts backward, the forced guiding action of the slot in the movable guide body and the pin in the fixed guide body causes the waist to move. The support is pushed forward. Further, in claim 2, when a person leans against the backrest and the back support portion tilts backward, the waist support portion is
Inclining backward while rotating the pinion gear. In this case, since the distance between the meshing surface of the pinion gear with respect to the rack teeth and the rotation axis is set to increase as it goes downward, as the pinion gear rotates, the meshing point between the pinion gear and the waist support portion increases. Will move away from the axis of rotation of the pinion gear toward the front of the chair,
As a result, the waist support projects quickly forward.
【００１１】更に、請求項３の構成によると、背もたれ
の後傾動に連動したリンク体の強制的な押圧作用によ
り、腰支持部を前向きに素早く突出させることができ
る。更にまた請求項４の構成によると、背支持杆に設け
た支持体と背中支持部との相対的な姿勢は不変であるの
に対して、腰支持部は、背中支持部の後傾動にて下向き
に引っ張られる押圧体により、その下端が支持体から離
反するように変形して行く。従って、腰支持部は背中支
持部と一緒に後傾しつつ、背中支持部に対して強制的に
前向きに突出させられる。Further, according to the third aspect of the invention, the waist supporting portion can be quickly projected forward by the forced pressing action of the link body which is interlocked with the back tilting of the backrest. Further, according to the structure of claim 4, the relative postures of the support body provided on the back support rod and the back support portion are unchanged, whereas the waist support portion is tilted backward from the back support portion. By the pressing body pulled downward, the lower end of the pressing body is deformed so as to be separated from the support body. Therefore, the waist support part is forced to project forward with respect to the back support part while tilting backward together with the back support part.
【００１２】このように、いずれの請求項においても、
背中支持部の後傾動に連動して腰支持部を強制的に突出
させるものであるから、背もたれの後傾初期から人の腰
を腰支持部にて支持することが可能となるのであり、そ
の結果、快適なロッキング状態を得ることができる効果
を有する。Thus, in any of the claims,
Since the waist support is forcibly projected in conjunction with the backward tilting of the back support, it is possible to support the person's waist with the waist support from the beginning of the backward tilting of the backrest. As a result, there is an effect that a comfortable rocking state can be obtained.
【００１３】[0013]
【実施例】次に、本発明の実施例を図面に基づいて説明
する。図１〜図１３では、請求項１に対応した第１実施
例を示している。これらの図において符号１は椅子の脚
体を、符号２は脚体１の上端に設けた座受け部を、符号
３は座受け部２に取り付けられた座体を、符号４は背も
たれを各々示す。背もたれ４は、側面視略Ｌ字状に形成
した背支持杆５にて座受け部２に取り付けられている。Embodiments of the present invention will now be described with reference to the drawings. 1 to 13 show a first embodiment corresponding to claim 1. In these figures, reference numeral 1 denotes a leg of a chair, reference numeral 2 denotes a seat receiving portion provided on the upper end of the leg 1, reference numeral 3 denotes a seat attached to the seat receiving portion 2, and reference numeral 4 denotes a backrest. Show. The backrest 4 is attached to the seat receiving portion 2 by a back support rod 5 formed in a substantially L shape in a side view.
【００１４】座受け部２は、脚体１に固着した固定枠体
６を備えている。この固定枠体６は、上向きに開口し且
つ側面視で前部が斜め上向きに延びるように形成されて
おり、固定枠体６の前部上端に、左右一対の側板７ａを
備えた支持板７の前寄り部位を第１支軸８にて枢着し、
この支持板７に座体３を取り付けている。座体３は、座
板３′とその上面に張設したクッション３″とで構成さ
れている。The seat receiving portion 2 includes a fixed frame body 6 fixed to the leg body 1. The fixed frame body 6 is formed so as to open upward and have a front portion extending obliquely upward in a side view, and a support plate 7 having a pair of left and right side plates 7a at the upper end of the front portion of the fixed frame body 6. The front part of is pivotally attached by the first support shaft 8,
The seat 3 is attached to the support plate 7. The seat 3 is composed of a seat plate 3'and a cushion 3 "stretched over the upper surface thereof.
【００１５】前記背支持杆５は左右一対の側板５ａを備
えており、この背支持杆５における側板５ａの前部を斜
め下向きの傾斜状に延びるように形成して、両側板５ａ
の前端寄り部位を第２支軸９にて固定枠体６に枢着して
いる。背支持杆５における左右側板５ａの先端を固定枠
体６から前向きに突出して、この左右側板５ａ間に軸１
０を装架する一方、固定枠体６の上部前面に、左右一対
のブラケット１１を介して左右長手の軸１２を取り付
け、この軸１２と前記背支持杆５の先端に設けた軸１０
との間に、ばね受け１３を介してばね１４を介挿してい
る。The back support rod 5 is provided with a pair of left and right side plates 5a. The front portion of the side plate 5a of the back support rod 5 is formed so as to extend in a slanting downward slanted manner, and both side plates 5a are formed.
The portion near the front end of is fixed to the fixed frame body 6 by the second support shaft 9. The tips of the left and right side plates 5a of the back support rod 5 are projected forward from the fixed frame body 6, and the shaft 1 is provided between the left and right side plates 5a.
On the other hand, the shaft 12 mounted on the front surface of the fixed frame body 6 is mounted with a left and right long shaft 12 through a pair of left and right brackets 11, and the shaft 12 and the shaft 10 provided at the tip of the back support rod 5 are mounted.
The spring 14 is interposed between the spring 14 and the spring.
【００１６】また、背支持杆５における左右両側板５ａ
の前後中途部に、側面視で後傾状に延びる長孔１５を穿
設し、支持板７における左右側板７ａの後端寄り部位に
装架した第３支軸１６を、前記背支持杆５の長孔１５に
挿入する。このとき、図７に示すように、長孔１６の延
びる姿勢を、第３支軸１６の回動軌跡Ｏ１よりも前傾し
た姿勢にしている。The left and right side plates 5a of the back support rod 5 are also provided.
A long hole 15 extending rearward in a side view is bored in the front-rear halfway portion of the back support rod 5 and a third support shaft 16 mounted on a portion of the support plate 7 near the rear end of the left and right side plates 7a is attached to the back support rod 5. It is inserted into the long hole 15 of. At this time, as shown in FIG. 7, the elongated hole 16 is extended such that the elongated hole 16 is inclined forward of the rotation trajectory O1 of the third support shaft 16.
【００１７】従って、背支持杆５が後傾すると、長孔１
５のガイド作用にて、第３支軸１６は下方に移動して、
座体３も後傾して行く。その場合、第三支軸１６は、第
１支軸８を中心にしてＯ３で示す軌跡に沿ってしか回動
できないため、第３支軸１６は、長孔１５の一端の回動
軌跡Ｏ１と他端の回動軌跡Ｏ２との寸法差Ｌ２だけ軌跡
Ｏ３に沿って回動し、その移動量Ｌ２は長孔１６全体の
移動量Ｌ１よりも小さい。このため、座体３の後傾角度
θ２は背支持杆５の後傾角度θ１よりも小さくなる。Therefore, when the back support rod 5 tilts backward, the long hole 1
By the guide action of 5, the third support shaft 16 moves downward,
The seat body 3 also leans backward. In that case, the third support shaft 16 can rotate only along the locus indicated by O3 about the first support shaft 8, so that the third support shaft 16 can rotate with the rotation locus O1 at one end of the elongated hole 15. It rotates along the locus O3 by the dimensional difference L2 from the rotation locus O2 at the other end, and its movement amount L2 is smaller than the movement amount L1 of the entire elongated hole 16. Therefore, the rearward tilt angle θ2 of the seat body 3 becomes smaller than the rearward tilt angle θ1 of the back support rod 5.
【００１８】なお、前記ばね１４のばね力は、人が座体
３に座っただけでは縮まないような強さに設定されてい
る。前記背もたれ４は、人の背中を支持する背中支持部
４ａと腰を支持する腰支持部４ｂとから成り、その全体
は、合成樹脂製の基板１７にクッション１８を張設する
ことによって形成されている。図１０及び図１２に示す
ように、背中支持部４ａにおける基板１７の周縁１７ａ
は前向きに折り曲げられている。他方、図１１に示すよ
うに、腰支持部４ｂの基板１７は平板状に形成されてい
る。従って、背中支持部４ａは殆ど変形しないが、腰支
持部４ｂは弾性変形し得る。The spring force of the spring 14 is set so that the person does not contract only by sitting on the seat 3. The backrest 4 is composed of a back support portion 4a for supporting a person's back and a waist support portion 4b for supporting a waist, and the entire backrest 4 is formed by stretching a cushion 18 on a substrate 17 made of synthetic resin. There is. As shown in FIGS. 10 and 12, a peripheral edge 17a of the substrate 17 in the back support portion 4a.
Is bent forward. On the other hand, as shown in FIG. 11, the substrate 17 of the waist supporting portion 4b is formed in a flat plate shape. Therefore, the back support portion 4a hardly deforms, but the waist support portion 4b can elastically deform.
【００１９】背もたれ４のうち腰支持部４ｂの背面に
は、後ろ向きに突出するブラケット状の可動ガイド体１
９が固着されており、この可動ガイド体１９に、側面視
で前向き凹状の円弧状の長溝孔２０を穿設する。そし
て、前記固定枠体６の背面に、前記可動ガイド体２０の
外側面に沿って延びるよう側面視Ｌ字状に形成した左右
一対の固定ガイド体２１を設け、この左右両固定ガイド
体２１の上端間に装架したピン２２を、前記可動ガイド
体１９の長溝孔２０に挿通している。On the back surface of the waist support portion 4b of the backrest 4, a movable guide body 1 in the shape of a bracket protruding rearwardly.
9 is fixed to the movable guide body 19, and an elongated slot 20 having a circular arc shape is formed in the movable guide body 19 in a forward concave shape in a side view. On the back surface of the fixed frame body 6, a pair of left and right fixed guide bodies 21 formed in an L shape in a side view so as to extend along the outer side surface of the movable guide body 20 are provided. The pin 22 mounted between the upper ends is inserted into the long groove hole 20 of the movable guide body 19.
【００２０】以上の構成において、人が背もたれ４にも
たれ掛かると、背中支持部４ａは、ばね１４に抗して第
２支軸９を中心にして後傾動して行く（図７参照）。他
方、腰支持部４ｂは、可動ガイド体１９の長溝孔２０と
固定ガイド体２１のピン２２との強制的なガイド作用に
より、下降動しつつ前向きに突出して行く。従って、背
もたれ４にもたれ掛かったロッキング状態で、人の腰
（臀部）が腰支持部４ｂにて素早く支持されて、快適な
ロッキング状態を得ることができるのである。In the above structure, when a person leans against the backrest 4, the back support portion 4a tilts backward about the second support shaft 9 against the spring 14 (see FIG. 7). On the other hand, the waist support portion 4b is moved downward and protrudes forward by the forced guiding action of the slot 20 of the movable guide body 19 and the pin 22 of the fixed guide body 21. Therefore, in a rocking state in which the backrest 4 leans against the backrest 4, a person's waist (buttock) is quickly supported by the waist supporting portion 4b, and a comfortable rocking state can be obtained.
【００２１】図１４〜図１５（Ａ）に示すのは請求項２
に対応した第２実施例である。この実施例における椅子
の基本的構成は第１実施例と同じであり、図１５（Ａ）
で拡大して示した部分が第１実施例と相違している。こ
の第２実施例では、左右固定ガイド体２１の上端間に、
外周面に歯を刻設したピニオンギヤ２４をピン２５にて
回転自在に取り付ける一方、腰支持部４ｂの背面に、前
記ピニオンギヤ２４に噛合するラック歯２６を設けてい
る。このラック歯２６は、側面視の状態で腰支持部４ｂ
と一体に変形し得る。It is the claim 2 shown in FIGS. 14 to 15 (A).
It is a second embodiment corresponding to. The basic structure of the chair in this embodiment is the same as that of the first embodiment, and FIG.
The enlarged portion of FIG. 3 differs from that of the first embodiment. In the second embodiment, between the upper ends of the left and right fixed guide bodies 21,
A pinion gear 24 having teeth engraved on its outer peripheral surface is rotatably attached by a pin 25, while rack teeth 26 meshing with the pinion gear 24 are provided on the back surface of the waist support portion 4b. The rack teeth 26 are provided on the waist support portion 4b in a side view.
Can be transformed together with.
【００２２】前記ピニオンギヤ２４は、側面視で略上下
方向に長円の楕円状に形成されており、従って、ピニオ
ンギヤ２４のうちラック歯２６に対する噛合面２４ａと
回転軸心（ピン２５）との間隔は、上方に行くに従って
大きくなる。この第２実施例において、人が背もたれ４
にもたれ掛かると、背中支持部４ａは、図１４の円弧Ｏ
４で示すように背支持杆５と共に後傾して行く。他方、
腰支持部４ｂは背中支持部４ａと共に下向き動するた
め、ピニオンギヤ２４を右側面視で反時計回りに回転さ
せながら、前向きに突出して行く。The pinion gear 24 is formed in an elliptical shape having an ellipse in a substantially vertical direction in a side view. Therefore, in the pinion gear 24, the gap between the meshing surface 24a of the pinion gear 24 with respect to the rack teeth 26 and the rotation axis (pin 25). Becomes larger as it goes up. In this second embodiment, a person has a backrest 4
When leaning against the back, the back support portion 4a will move to the circular arc O in FIG.
As shown in FIG. 4, the back support rod 5 is tilted backward. On the other hand,
Since the waist support portion 4b moves downward together with the back support portion 4a, it projects forward while rotating the pinion gear 24 counterclockwise in right side view.
【００２３】この場合、ピニオンギヤ２４を用いずに、
単に固定ガイド体２１の上端で腰支持部４ｂを支持した
に過ぎない場合には、腰支持部４ｂは固定ガイド体２１
の上端を支点にして回動するに過ぎないため、腰支持部
４ｂを素早く前向き突出させることはできない。これに
対して第２実施例の構成では、ピニオンギヤ２４が楕円
であることにより、ラック歯２６とピニオンギヤ２４と
の噛合箇所２４ａからピン２２までの距離が、ピニオン
ギヤ２４の回転に連れて急激に大きくなるため、腰支持
部４ｂはピニオンギヤ２４の回転に連れて素早く前向き
突出する。従って、人の腰（臀部）を的確に支持するこ
とができるのである。In this case, without using the pinion gear 24,
When the waist support portion 4b is merely supported by the upper end of the fixed guide body 21, the waist support portion 4b is fixed to the fixed guide body 21.
Since it only rotates with the upper end of the fulcrum as a fulcrum, the waist support portion 4b cannot be quickly projected forward. On the other hand, in the configuration of the second embodiment, since the pinion gear 24 has an elliptical shape, the distance from the meshing point 24a between the rack tooth 26 and the pinion gear 24 to the pin 22 rapidly increases as the pinion gear 24 rotates. Therefore, the waist support portion 4b quickly projects forward as the pinion gear 24 rotates. Therefore, it is possible to accurately support a person's waist (buttock).
【００２４】図１５（Ｂ）は前記第２実施例の変形例で
ある第３実施例で、この実施例は、ピニオンギヤ２４を
真円状に形成して、回動中心（すなわちピン２５の位
置）を下方に偏心させたものである。図１６に示すのは
請求項３に対応した第４実施例であり、この実施例は、
座体３及び背もたれ４の取り付け構造は第１実施例と同
じであり、また、固定ガイド体２１を腰支持部４ｂの背
面に臨ませている点も第１実施例と同じである。FIG. 15B shows a third embodiment which is a modification of the second embodiment. In this embodiment, the pinion gear 24 is formed in a perfect circle shape, and the rotation center (that is, the position of the pin 25). ) Is eccentric downward. FIG. 16 shows a fourth embodiment corresponding to claim 3, and this embodiment is
The mounting structure of the seat body 3 and the backrest 4 is the same as that in the first embodiment, and the point that the fixed guide body 21 faces the back surface of the waist support portion 4b is also the same as in the first embodiment.
【００２５】この第４実施例では、左右固定ガイド体２
１の上端間に、側面視で後傾状に延びる第１リンク体２
８の下端部を枢着し、この第１リンク体２８の上端と背
支持杆５の水平部とを第２リンク体２９で連結したもの
である。この第４実施例では、人が背もたれ４にもたれ
掛かって背支持杆５が後傾すると、第１リンク体２８が
第２リンク体２９を介して後傾動し、腰支持部４ｂが前
向きに押し出される。In the fourth embodiment, the left and right fixed guide bodies 2 are
A first link body 2 extending between the upper ends of the two in a rearwardly inclined shape in a side view.
The lower end of 8 is pivotally attached, and the upper end of the first link body 28 and the horizontal portion of the back support rod 5 are connected by a second link body 29. In the fourth embodiment, when a person leans against the backrest 4 and the back support rod 5 tilts backward, the first link body 28 tilts rearward via the second link body 29, and the waist support portion 4b is pushed forward. Be done.
【００２６】図１７に示すのは請求項３に対応した第５
実施例で、１本のリンク体３０を利用したものである。
すなわち、側面視で後傾状に延びるように形成したリン
ク体３０の下端寄り部位を固定ガイド体２１の上端に枢
着する一方、リンク体３０の上端寄り部位に長孔３１を
穿設し、この長孔３１に、背支持杆５に取り付けたピン
３２を挿通したものである。FIG. 17 shows a fifth aspect corresponding to the third aspect.
In the embodiment, one link body 30 is used.
That is, the lower end portion of the link body 30 formed so as to extend rearward in a side view is pivotally attached to the upper end of the fixed guide body 21, while the long hole 31 is formed in the upper end portion of the link body 30. The pin 32 attached to the back support rod 5 is inserted into the elongated hole 31.
【００２７】この第５実施例では、背支持杆５が後傾す
るとリンク体３０が後傾して、腰支持部４ｂが前向きに
突出して行く。図１８に示すのは、請求項３に対応した
第６実施例である。この実施例では、上下長手のリンク
体３０の上端部を腰支持部４ｂの背面に枢支する一方、
リンク体３０の下端部を、固定枠体６の後ろ向き延長部
６ｂに枢着し、リンク体３０の一端と他端との間の中途
部に長孔３１を穿設して、この長孔３１に、背支持杆５
に取り付けたピン３２を挿通したものである。この実施
例では、背支持杆５が後傾動するとリンク体３０が前傾
動して、腰支持部４ｂが前向きに押圧される。In the fifth embodiment, when the back support rod 5 tilts backward, the link body 30 tilts backward, and the waist support portion 4b projects forward. FIG. 18 shows a sixth embodiment corresponding to the third aspect. In this embodiment, while the upper and lower ends of the link body 30 having a vertically long length are pivotally supported on the back surface of the waist support portion 4b,
The lower end portion of the link body 30 is pivotally attached to the rearward extending portion 6b of the fixed frame body 6, and a long hole 31 is formed in the middle portion between one end and the other end of the link body 30. Back support rod 5
The pin 32 attached to is inserted. In this embodiment, when the back support rod 5 tilts backward, the link body 30 tilts forward and the waist support portion 4b is pressed forward.
【００２８】図１９に示すのは請求項３に対応した第７
実施例である。この実施例では、側面視Ｌ字状の第１リ
ンク体２８と直線状の第２リンク体２９とを利用してい
る。第１リンク体２８は、その上端が腰支持部４ｂの背
面に臨むように配置されている。また、第１リンク体２
８の前後長手中途部を、座体３に固着したブラケット３
４にピン３５にて枢着している。そして、第１リンク体
２８の前端と背支持杆５の水平部との間を第２リンク体
２９で連結している。FIG. 19 shows a seventh embodiment corresponding to claim 3.
This is an example. In this embodiment, an L-shaped first link body 28 and a linear second link body 29 are used in a side view. The first link body 28 is arranged so that its upper end faces the back surface of the waist support portion 4b. Also, the first link body 2
Bracket 3 in which the longitudinal middle part of 8 is fixed to seat body 3
It is pivotally attached to pin 4 by a pin 35. A second link body 29 connects the front end of the first link body 28 and the horizontal portion of the back support rod 5.
【００２９】従って、人が背もたれ４にもたれ掛かって
背支持杆５が後傾すると、第１リンク体２８が図１９で
示す右側面視の状態で半時計回りに回動して、腰支持部
４ｂが前向きに押し出される。この場合、第１リンク体
２８の上端に、腰支持部４ｂの背面に接当する側面視円
弧状の接当体３６を設けている。図２０に示すのは、請
求項３に対応した第８実施例である。この実施例では、
上端を腰支持部４ｂの背面に接当した第１リンク体２８
の下端を、固定枠体６の後ろ向き延長部６ｂに枢着し、
この第１リンク体２８の上端寄り部位に第２リンク体２
９の下端を枢着し、更に、第２リンク体２９の上端を背
支持杆５の上部に枢着したものである。Therefore, when a person leans against the backrest 4 and the back support rod 5 tilts backward, the first link body 28 rotates counterclockwise in the state of the right side view shown in FIG. 4b is pushed forward. In this case, an abutment body 36 having an arcuate shape in a side view is provided at the upper end of the first link body 28 so as to abut against the back surface of the waist support portion 4b. FIG. 20 shows an eighth embodiment corresponding to the third aspect. In this example,
A first link body 28 having its upper end abutted against the back surface of the waist supporting portion 4b.
Pivoting the lower end of the to the rearward extension 6b of the fixed frame body 6,
The second link body 2 is provided at a portion near the upper end of the first link body 28.
The lower end of 9 is pivotally attached, and the upper end of the second link body 29 is also pivotally attached to the upper part of the back support rod 5.
【００３０】この第８実施例では、背支持杆５が後傾動
すると、第２リンク体２９を介して第１リンク体２８が
前傾して、腰支持部４ｂが第１リンク体２８の上端にて
前向きに押し出される。図２１〜図２４に示すのは請求
項４に対応した第９実施例である。この第９実施例で
は、固定枠体６に固定した座体３の後部下面に左右一対
のブラケット４０を設けて、このブラケット４０に背支
持杆５を枢軸４１にて枢着し、背支持杆５の上端に、背
もたれ４の背面に沿って延びる支持体４２を固着し、こ
の支持体４２に背中支持部４ａのみを固着している。枢
軸４１は背支持杆５に固着している。また、支持体４２
は殆ど弾性変形しない剛体である。In the eighth embodiment, when the back support rod 5 is tilted rearward, the first link body 28 is tilted forward through the second link body 29, and the waist support portion 4b is moved to the upper end of the first link body 28. Is extruded in a positive direction. 21 to 24 show a ninth embodiment corresponding to the fourth aspect. In the ninth embodiment, a pair of left and right brackets 40 are provided on the lower surface of the rear portion of the seat body 3 fixed to the fixed frame body 6, and the back support rods 5 are pivotally attached to the brackets 40 by means of a pivot shaft 41. A support body 42 extending along the back surface of the backrest 4 is fixed to the upper end of the backrest 5, and only the back support portion 4a is fixed to the support body 42. The pivot 41 is fixed to the back support rod 5. In addition, the support 42
Is a rigid body that is hardly elastically deformed.
【００３１】支持体４２と腰支持部４ｂとの間隔は下方
に行くに従って狭くなるように設定されており、この支
持体４２と腰支持部４ｂとの間の空所に、ローラ状の押
圧体４３を左右方向に延びるようにして配設している。
押圧体４３は、左右一対の引っ張りばね４４にて支持体
４２に吊支されている。更に、前記背支持杆５の枢軸４
１に大径の第１ギヤ４５を固着する一方、固定枠体６の
背面から三本の後ろ向き延長部６ｂ，６ｃ，６ｃを突設
し、中央部の後ろ向き延長部６ｃと外側の一本の後ろ向
き延長部６ｂとの間に装架した短かい軸４６に小径の第
２ギヤ４７を固着し、固定枠体６の各後ろ向き延長部６
ｂ，６ｃに貫通した長い軸４８に、前記第２ギヤ４７に
噛合する小径の第３ギヤ４９を固着し、前記長い軸４８
のうち前記短い軸４６から外れた部位に大径のホイール
５０を固着し、このホイール５０の外周面と前記押圧体
４３の左右両端とをワイヤー５１で連結している。The distance between the support 42 and the waist support 4b is set to become narrower as it goes downward, and a roller-shaped pressing body is provided in the space between the support 42 and the waist support 4b. 43 is arranged so as to extend in the left-right direction.
The pressing body 43 is suspended from the support body 42 by a pair of left and right tension springs 44. Further, the pivot 4 of the back support rod 5
While fixing the large-diameter first gear 45 to 1, the three rearward extending portions 6b, 6c, 6c are projectingly provided from the rear surface of the fixed frame body 6, and the rearward extending portion 6c at the central portion and the outer one A second shaft 47 having a small diameter is fixed to a short shaft 46 mounted between the rear extension 6b and the rear extension 6b.
A small diameter third gear 49 that meshes with the second gear 47 is fixed to a long shaft 48 that penetrates b and 6c.
A large-diameter wheel 50 is fixed to a portion of the short shaft 46 that is off the short axis 46, and the outer peripheral surface of the wheel 50 and the left and right ends of the pressing body 43 are connected by a wire 51.
【００３２】前記ワイヤー５１は、図２３に示すよう
に、固定枠体６における後ろ向き延長部６ｂに貫通した
ピン５２に係止している。また、ワイヤー５１の上部
は、押圧体４３の左右両端に係着するために二股状に形
成されている。この第９実施例では、背支持杆５が後傾
すると、各３つのギヤ４５，４７，４９及びホイール５
０による増幅作用により、押圧体４３が下向きに大きく
引っ張られて、腰支持部４ｂと支持体４２との間隔が広
がって行く。従って、腰支持部４ｂは、図２３に一点鎖
線で示すように、背中支持部４ａと一緒に後傾しつつ背
中支持部４ａに対して前向き突出して行く。As shown in FIG. 23, the wire 51 is locked to a pin 52 penetrating the rearward extending portion 6b of the fixed frame body 6. Further, the upper portion of the wire 51 is formed in a bifurcated shape so as to engage with the left and right ends of the pressing body 43. In the ninth embodiment, when the back support rod 5 is tilted backward, each of the three gears 45, 47, 49 and the wheel 5 is moved.
Due to the amplification effect of 0, the pressing body 43 is largely pulled downward, and the distance between the waist supporting portion 4b and the supporting body 42 widens. Therefore, as shown by the alternate long and short dash line in FIG. 23, the waist support portion 4b inclines backward together with the back support portion 4a and projects forward with respect to the back support portion 4a.
【００３３】なお、押圧体４３を下向きに引っ張る手段
は必ずしもワイヤー５１に限らず、また、押圧体４３の
形状もローラ状である必要はない。The means for pulling the pressing body 43 downward is not necessarily limited to the wire 51, and the pressing body 43 does not have to be roller-shaped.
【図１】第１実施例の側面図である。FIG. 1 is a side view of a first embodiment.
【図２】図１の背面図である。FIG. 2 is a rear view of FIG.
【図３】図１の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG.
【図４】図２の一部切り欠き要部拡大図である。FIG. 4 is an enlarged view of a partly cutaway main part of FIG.
【図５】図１のＶ−Ｖ視平面図である。5 is a plan view taken along line VV of FIG.
【図６】図５のVI−VI視断面図である。6 is a sectional view taken along line VI-VI of FIG.
【図７】背支持杆と座体との後傾角度の関係を示す図で
ある。FIG. 7 is a diagram showing a relationship between a back support rod and a seat body at a rearward tilt angle.
【図８】図６のVIII−VIII視正面図である。8 is a front view taken along the line VIII-VIII in FIG.
【図９】図６のIX−IX視断面図である。9 is a sectional view taken along line IX-IX of FIG.
【図１０】図１のＸ−Ｘ視平断面図である。10 is a plan sectional view taken along line XX of FIG.
【図１１】図１のXI−XI視平断面図である。11 is a plan sectional view taken along the line XI-XI of FIG.
【図１２】図１２のＸII−ＸII視断面図である。12 is a sectional view taken along line XII-XII of FIG.
【図１３】作用を示す図である。FIG. 13 is a diagram showing an operation.
【図１４】第２実施例の要部側面図である。FIG. 14 is a side view of a main part of the second embodiment.
【図１５】（Ａ）は図１４の要部拡大図、（Ｂ）は第３
実施例の断面図である。15A is an enlarged view of a main part of FIG. 14, and FIG. 15B is a third view.
It is sectional drawing of an Example.
【図１６】第４実施例の要部側面図である。FIG. 16 is a side view of a main portion of the fourth embodiment.
【図１７】第５実施例の要部側面図である。FIG. 17 is a side view of the essential parts of the fifth embodiment.
【図１８】第６実施例の要部側面図である。FIG. 18 is a side view of the essential portions of the sixth embodiment.
【図１９】第７実施例の要部側面図である。FIG. 19 is a side view of the essential portions of the seventh embodiment.
【図２０】第８実施例の要部側面図である。FIG. 20 is a side view of the essential portions of the eighth embodiment.
【図２１】第９実施例の一部破断右側面図である。FIG. 21 is a partially cutaway right side view of the ninth embodiment.
【図２２】（Ａ）は図２１のXXIIＡ−XXIIＡ視平断面
図、（Ｂ）は図２１のXXIIＢ−XXIIＢ視平断面図であ
る。22A is a plan sectional view taken along the line XXIIA-XXIIA of FIG. 21, and FIG. 22B is a plan sectional view taken along the line XXIIB-XXIIB of FIG. 21.
【図２３】第９実施例の要部縦断側面図である。FIG. 23 is a vertical sectional side view of a main part of the ninth embodiment.
【図２４】図２３のXXIV−XXIV視断面図である。24 is a sectional view taken along line XXIV-XXIV of FIG.
１ 脚体 ２ 座受け部 ３ 座体 ４ 背もたれ ４ａ 背中支持部 ４ｂ 腰支持部 ５ 背支持杆 ６ 固定枠体 １９ 可動ガイド体 ２０ 長溝孔 ２１ 固定ガイド体 ２２ ピン ２４ ピニオンギヤ ２６ ラック歯 ２８，２９，３０ リンク体 ４２ 支持体 ４３ 押圧体 ５１ ワイヤー DESCRIPTION OF SYMBOLS 1 leg body 2 seat receiving portion 3 seat body 4 backrest 4a back supporting portion 4b waist supporting portion 5 back supporting rod 6 fixed frame body 19 movable guide body 20 long groove hole 21 fixed guide body 22 pin 24 pinion gear 26 rack tooth 28, 29, 30 link body 42 support body 43 pressing body 51 wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中迫 勝 京都府向日市上植野御塔道28−24 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaru Nakasako 28-24, Kamitoeno Michimichi, Muko City, Kyoto Prefecture
Claims (4)
性体にて弾性的に支持された状態で後傾する背もたれと
を備え、前記背もたれを、人の背中に対する背中支持部
と腰に対する腰支持部とを連接した形態に形成し、腰支
持部を背中支持部に対して相対的に前向き突出可能に形
成して成る椅子において、 前記座受け部に、前記背もたれにおける腰支持部の背面
に向けて延びる固定ガイド体を設け、該固定ガイド体の
上端部に、水平横向きに延びるピンを設ける一方、前記
背もたれにおける腰支持部の背面に、前記固定ガイド体
のピンが嵌まる長溝孔を備えた可動ガイド体を設け、該
可動ガイド体の長溝孔を、前記ピンとのガイド作用にて
腰支持部を背中支持部に対して相対的に前向き突出させ
るような形状に形成したことを特徴とする背もたれ付き
椅子。1. A seat supporting member supported by a seat receiving portion, and a backrest that tilts backward while being elastically supported by an elastic body such as a spring. The backrest supports the backrest against a person's back. And a waist support part for the waist are connected to each other, and the waist support part is formed so as to be able to project forward relative to the back support part, wherein the seat support part has a waist support in the backrest. A fixed guide body extending toward the back surface of the back portion is provided, and a pin extending horizontally in the horizontal direction is provided at the upper end portion of the fixed guide body, while a pin of the fixed guide body is fitted on the back surface of the waist support portion of the backrest. A movable guide body having a long groove hole is provided, and the long groove hole of the movable guide body is formed in a shape such that the waist support portion projects forward relative to the back support portion by a guide action with the pin. Also characterized by Chair with a saucepan.
性体にて弾性的に支持された状態で後傾する背もたれと
を備え、前記背もたれを、人の背中に対する背中支持部
と腰に対する腰支持部とを連接した形態に形成し、腰支
持部を背中支持部に対して相対的に前向き突出可能に形
成して成る椅子において、 前記座受け部に、前記背もたれにおける腰支持部の背面
に向けて延びる固定ガイド体を設け、該固定ガイド体の
上端部に、ピニオンギヤを、左右水平状の回転軸回りに
回転するように軸支する一方、前記背もたれにおける腰
支持部の背面に、前記ピニオンギヤに噛合するラック歯
を設け、且つ、前記ピニオンギヤのうち腰支持部におけ
るラック歯との噛合面を、腰支持部によるピニオンギヤ
の回転方向と反対方向に行くに従って回転中心との間隔
が広がるように形成したことを特徴とする背もたれ付き
椅子。2. A seat supporting member supported by a seat receiving portion, and a backrest that tilts backward while being elastically supported by an elastic body such as a spring, the backrest supporting portion for supporting the back of a person. And a waist support part for the waist are connected to each other, and the waist support part is formed so as to be able to project forward relative to the back support part, wherein the seat support part has a waist support in the backrest. A fixed guide body extending toward the rear surface of the back portion, and a pinion gear is pivotally supported on the upper end portion of the fixed guide body so as to rotate around a horizontal horizontal rotation axis, while the back surface of the waist support portion in the backrest is supported. A rack tooth that meshes with the pinion gear is provided, and the meshing surface of the pinion gear with the rack tooth in the waist support portion is rotated along the direction opposite to the rotation direction of the pinion gear by the waist support portion. A chair with a backrest, characterized in that it is formed so as to widen the space between and.
性体にて弾性的に支持された状態で後傾する背もたれと
を備え、前記背もたれを、人の背中に対する背中支持部
と腰に対する腰支持部とを連接した形態に形成し、腰支
持部を背中支持部に対して相対的に前向き突出可能に形
成して成る椅子において、 前記腰支持部の背面を、背もたれの後傾動に連動して強
制的に回動するリンク体にて前向きに押圧するようにし
たことを特徴とする背もたれ付き椅子。3. A seat supporting member supported by a seat receiving portion, and a backrest tilted backward in a state of being elastically supported by an elastic body such as a spring, the backrest supporting portion for supporting a person's back. And a waist support part for the waist are connected to each other, and the waist support part is formed to be able to project forward relative to the back support part, wherein the back surface of the waist support part is located behind the backrest. A chair with a backrest characterized in that a link body that is forcibly rotated in conjunction with tilting is pressed forward.
性体にて弾性的に支持された状態で後傾する背もたれと
を備え、前記背もたれを、人の背中に対する背中支持部
と腰に対する腰支持部とを連接した形態に形成し、腰支
持部を背中支持部に対して相対的に前向き突出可能に形
成して成る椅子において、 前記座受け部又は座体に、前記背中支持部が取付く背支
持杆を後傾動自在に設け、該背支持杆に、前記腰支持部
の背面に沿って延びる支持体を、当該支持体と腰支持部
との間隔が下方に行くに従って狭くなるようにして設
け、該支持体と腰支持部の背面との間に、背中支持部の
後傾動に連動して下向きに引っ張られるようにした押圧
体を介挿したことを特徴とする背もたれ付き椅子。4. A seat supporting member supported by a seat receiving portion, and a backrest that leans backward while being elastically supported by an elastic body such as a spring, and the backrest is a back supporting portion for a person's back. And a waist support part for the waist are connected to each other, and the waist support part is formed so as to be able to project forward relative to the back support part. A back support rod to which the support portion is attached is provided so as to be tiltable rearward, and a support body extending along the back surface of the waist support portion is provided on the back support rod as the distance between the support body and the waist support portion decreases. A backrest, characterized in that it is provided so as to be narrow, and a pressing body is provided between the support body and the back surface of the waist support portion so as to be pulled downward in conjunction with the rearward tilting of the back support portion. With chair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31028293A JP3378321B2 (en) | 1993-12-10 | 1993-12-10 | Chair with backrest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31028293A JP3378321B2 (en) | 1993-12-10 | 1993-12-10 | Chair with backrest |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07155233A true JPH07155233A (en) | 1995-06-20 |
| JP3378321B2 JP3378321B2 (en) | 2003-02-17 |
Family
ID=18003360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31028293A Expired - Fee Related JP3378321B2 (en) | 1993-12-10 | 1993-12-10 | Chair with backrest |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3378321B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218047A (en) * | 2005-02-09 | 2006-08-24 | Itoki Corp | Chair |
| JP2006218048A (en) * | 2005-02-09 | 2006-08-24 | Itoki Corp | Chair |
| JP2007130345A (en) * | 2005-11-11 | 2007-05-31 | Kokuyo Furniture Co Ltd | Spring attaching structure |
| JP2008012186A (en) * | 2006-07-07 | 2008-01-24 | Itoki Corp | Chair |
| JP2008012227A (en) * | 2006-07-10 | 2008-01-24 | Itoki Corp | Chair |
| JP2008136597A (en) * | 2006-11-30 | 2008-06-19 | Itoki Corp | Chair |
| JP2011087832A (en) * | 2009-10-26 | 2011-05-06 | Itoki Corp | Rocking chair |
| JP2015188456A (en) * | 2014-03-27 | 2015-11-02 | 株式会社岡村製作所 | chair |
| KR102292617B1 (en) * | 2021-01-05 | 2021-08-24 | 한국에스에스(주) | A chair for student |
-
1993
- 1993-12-10 JP JP31028293A patent/JP3378321B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218047A (en) * | 2005-02-09 | 2006-08-24 | Itoki Corp | Chair |
| JP2006218048A (en) * | 2005-02-09 | 2006-08-24 | Itoki Corp | Chair |
| JP2007130345A (en) * | 2005-11-11 | 2007-05-31 | Kokuyo Furniture Co Ltd | Spring attaching structure |
| JP4721183B2 (en) * | 2005-11-11 | 2011-07-13 | コクヨ株式会社 | Spring mounting structure |
| JP2008012186A (en) * | 2006-07-07 | 2008-01-24 | Itoki Corp | Chair |
| JP2008012227A (en) * | 2006-07-10 | 2008-01-24 | Itoki Corp | Chair |
| JP2008136597A (en) * | 2006-11-30 | 2008-06-19 | Itoki Corp | Chair |
| JP2011087832A (en) * | 2009-10-26 | 2011-05-06 | Itoki Corp | Rocking chair |
| US8752896B2 (en) | 2009-10-26 | 2014-06-17 | Itoki Corporation | Rocking chair |
| JP2015188456A (en) * | 2014-03-27 | 2015-11-02 | 株式会社岡村製作所 | chair |
| KR102292617B1 (en) * | 2021-01-05 | 2021-08-24 | 한국에스에스(주) | A chair for student |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3378321B2 (en) | 2003-02-17 |
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