JP2014104027A - Stepless angle adjustment fitting - Google Patents

Stepless angle adjustment fitting Download PDF

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JP2014104027A
JP2014104027A JP2012257391A JP2012257391A JP2014104027A JP 2014104027 A JP2014104027 A JP 2014104027A JP 2012257391 A JP2012257391 A JP 2012257391A JP 2012257391 A JP2012257391 A JP 2012257391A JP 2014104027 A JP2014104027 A JP 2014104027A
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arm
peripheral surface
outer peripheral
winding
braking
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JP5716004B2 (en
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Naonobu Yamashita
直伸 山下
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Koyo Giken KK
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Abstract

PROBLEM TO BE SOLVED: To provide a stepless angle adjustment fitting capable of making a back part reliably and stably remain stationary in a stepless manner throughout a tilt angle range of the back part of a legless chair.SOLUTION: A circular outer peripheral surface part S for being subjected to braking is braked by being brought into resilient pressure contact by a braking spring material 20 comprising a long leg 23, a short leg 24 and a rolled part 21.

Description

本発明は、無段階角度調整金具に係り、特に、座椅子の背部の角度を無段階に調整するための角度調整金具に関する。   The present invention relates to a stepless angle adjustment fitting, and more particularly to an angle adjustment fitting for stepless adjustment of the angle of the back of a seat.

従来から、図1の斜視図に示すような背部15と座部16を有する座椅子に於て、背部15の傾斜角度を調整するために角度調整金具A,Aを介して、背部15と座部16を、連結している。
本発明者は、このような用途に使用可能な、十分に多段階に背部15の傾斜角度を調整する角度調整金具に関する発明を提案してきた(例えば、特許文献1参照)。
即ち、上記金具Aとして、ケス部を有する第1アームと、この第1アームと揺動可能に枢結されるギア部を有する第2アームとを、具備し、かつ、第1アームにはくさび面を形成して、このくさび面に当接自在な浮動くさび部材を、くさび面と上記ギア部の間に形成したくさび形空間内に、浮動自在に装入した多段ギア式角度調整金具を、多数提案してきた。
Conventionally, in a seat chair having a back portion 15 and a seat portion 16 as shown in the perspective view of FIG. 1, in order to adjust the inclination angle of the back portion 15 through the angle adjusting brackets A and A, The seat 16 is connected.
The present inventor has proposed an invention relating to an angle adjustment fitting that can be used for such applications and adjusts the inclination angle of the back portion 15 in a sufficiently multistage manner (see, for example, Patent Document 1).
That is, the metal fitting A includes a first arm having a case portion and a second arm having a gear portion pivotably connected to the first arm, and the first arm has a wedge. A multi-stage gear type angle adjustment fitting in which a floating wedge member that freely contacts the wedge surface is formed in a wedge-shaped space formed between the wedge surface and the gear portion. Many proposals have been made.

ところが、さらに進んで「無段階」にて角度調整可能な金具について要望もある。
従来から、この「無段階」に角度を調整できる装置(金具)も知られている(例えば、特許文献2参照)。しかしながら、従来の無段階角度調整装置(金具)は、比較的大型で、部品点数も多く、機構が複雑であり、静止した軸心廻りに回転・揺動する部材に対して、摩擦部材を圧接する構造のものであった。従って、大幅にコンパクト化を図る必要のある(図1に例示の)座椅子用角度調整金具Aとしては、全く利用できなかった。
しかも、前記特許文献2に開示されたような従来のものは、別途、ロック解除用レバー(操作レバー)を必要としていたため、座椅子としては使い難いという欠点、外部へ突出する部品(レバー)を有し、家庭用としては危険性が高まるという欠点もあった。
However, there is a demand for a metal fitting that can be further adjusted in angle by “stepless”.
Conventionally, an apparatus (metal fitting) that can adjust the angle steplessly is also known (see, for example, Patent Document 2). However, the conventional stepless angle adjustment device (metal fitting) is relatively large, has a large number of parts, has a complicated mechanism, and presses the friction member against a member that rotates and swings around a stationary axis. It was of the structure to do. Therefore, it cannot be used at all as the angle adjusting bracket A for a seat chair (illustrated in FIG. 1) which needs to be greatly downsized.
In addition, the conventional device disclosed in Patent Document 2 requires a separate unlocking lever (operating lever), so that it is difficult to use as a seating chair, and a component protruding to the outside (lever ) And has the disadvantage of increasing the danger for household use.

特許第4418382号公報Japanese Patent No. 4418382 特開2000−300371号公報JP 2000-300371 A

解決しようとする課題は、操作レバー無しで、かつ、コンパクトで、機構も簡易な角度調整金具では、使用状態下で座椅子の背部が後方へ倒れる大きな回転トルクに、耐えられない点である。即ち、人が急激に背部へもたれた時に、大きな回転トルクが角度調整金具に作用して、ズルズルと滑り回転してしまう点である。
別の表現をすれば、座椅子用に好適な(コンパクトで操作レバーが省略され、簡易な機構の)無段階角度調整金具を実現することは至難であったという点にある。
The problem to be solved is that the angle adjusting bracket without an operating lever, compact, and simple mechanism cannot withstand the large rotational torque that causes the back of the seat chair to fall backwards under use. . In other words, when a person leans back suddenly, a large rotational torque acts on the angle adjusting bracket, causing slipping and rotation.
In other words, it is difficult to realize a stepless angle adjusting bracket (compact, with an operation lever omitted and a simple mechanism) suitable for a chair.

本発明に係る無段階角度調整金具は、座椅子の座部側に取着される第1アームと、背部側に取着される第2アームとを、備え;上記第2アーム側には、被制動用円形外周面部を有し;上記第1アーム側には、上記外周面部に巻込状に外嵌されて弾発的縮径力をもって上記外周面部に弾発的に圧接する巻込部と、該巻込部の開口端部から突設された弾性変形自在な長脚・短脚と、該長脚・短脚の先端を第1アームに取着する第1軸・第2軸と、を有し;上記第1軸の第1軸心点よりも、上記第2軸の第2軸心点及び上記円形外周面部の円形中心点を、後方位置に配設して;上記第1軸心点と上記円形中心点とを結んだ第1直線が水平線に対して成す傾斜角度θを、上記背部の使用状態傾動角度範囲αの略半分となるように設定した。
また、上記略半分とは、上記θとαとをもって示した不等式(α/2−10°)≦θ≦(α/2+10°)を充足していることが望ましい。
The stepless angle adjusting bracket according to the present invention includes a first arm attached to the seat portion side of the seat and a second arm attached to the back portion side; A circular outer peripheral surface portion for braking; a winding that is externally fitted on the outer peripheral surface portion in a winding shape and is elastically pressed against the outer peripheral surface portion with a resiliently reduced diameter force on the first arm side. Part, elastically deformable long legs and short legs projecting from the opening end of the winding part, and first and second axes for attaching the tips of the long and short legs to the first arm A second axial center point of the second shaft and a circular center point of the circular outer peripheral surface portion are arranged at a rear position rather than the first axial point of the first shaft; The inclination angle θ formed by the first straight line connecting the one axial center point and the circular center point with respect to the horizontal line is set to be approximately half of the use state inclination angle range α of the back portion.
Moreover, it is desirable that the substantially half satisfies the inequality (α / 2−10 °) ≦ θ ≦ (α / 2 + 10 °) indicated by θ and α.

また、上記巻込部と上記外周面部との嵌合によって第2アームが第1アームに対して揺動可能に枢支され、上記第2アーム側の上記背部に作用するベクトルが、上記外周面部と上記巻込部との嵌合部位を介して、さらに、上記長脚と短脚を介して、上記第1アーム側へ 100%伝達されるように構成され、上記ベクトルによって、上記第1直線が後下方へ傾動するように、上記長脚・短脚・巻込部から成る制動用バネ材が弾性変形しつつ該巻込部が上記外周面部に追加圧接力を付与するように構成した。
また、上記制動用バネ材の上記巻込部は、ラジアル方向の幅寸法が、アキシャル方向の厚さ寸法よりも大きな形状である。
In addition, the second arm is pivotally supported with respect to the first arm by fitting the winding portion and the outer peripheral surface portion, and the vector acting on the back portion on the second arm side is the outer peripheral surface portion. And 100% are transmitted to the first arm side via the long leg and the short leg through the fitting portion between the first straight line and the winding part. The braking spring material composed of the long legs, the short legs, and the winding part is elastically deformed so that the winding part applies an additional pressure contact force to the outer peripheral surface part so that the rear part tilts rearward and downward.
Moreover, the said winding part of the said spring material for a brake is a shape where the width dimension of a radial direction is larger than the thickness dimension of an axial direction.

座椅子に座った人が背部にもたれて、大きな力を背部へ与えた際、背部の使用状態の傾動角度範囲の全範囲にわたって安定してそのときの背部の姿勢を保つ。即ち、使用状態下で座った人が、背部を後方へ倒れる方向に、力を与えたとしても、背部は、水平状0°から約80°〜90°の起立状にわたる全範囲で、ズルズルと後下方へ傾動することなく、背部の姿勢を保持可能である。
特に、無段階に背部の傾斜角度を調整自在でありながらも、背部を水平状に寝かせたときも、鉛直状に近く起立したときも、両者の中間の傾斜角度としたときにも、座った人から付与される背部への急激な回転トルクにも対応して、そのときの傾斜角度を維持できる。
さらに、手動の操作レバーも不要であって、コンパクトで、機構も簡易である。
When a person sitting in a seated chair leans against the back and gives a great force to the back, the posture of the back at that time is stably maintained over the entire range of the tilt angle range of the use state of the back. That is, even if a person sitting in use gives a force in the direction that the back part falls down backwards, the back part is sluggish in the entire range from 0 ° to about 80 ° to 90 ° in the horizontal direction. The posture of the back can be maintained without tilting rearward and downward.
In particular, it was possible to adjust the inclination angle of the back steplessly, but sat down when the back portion was laid down horizontally, when it stood up vertically, or when it was set at an intermediate inclination angle between the two. Corresponding to a sudden rotational torque applied to the back from a person, the inclination angle at that time can be maintained.
Furthermore, a manual operation lever is not required, and it is compact and has a simple mechanism.

本発明の無段階角度調整金具を有する座椅子の斜視図であって、かつ、従来技術の説明にも兼用している斜視図である。It is a perspective view of the seat chair which has the stepless angle adjustment metal fitting of this invention, and is also a perspective view which serves also for description of a prior art. 本発明の実施の一形態を示す斜視図である。It is a perspective view which shows one Embodiment of this invention. 分解斜視図である。It is a disassembled perspective view. 最大展開状態(β=0°)の断面図である。It is sectional drawing of the maximum expansion | deployment state ((beta) = 0 degree). 最大展開状態(β=0°)の断面図である。It is sectional drawing of the maximum expansion | deployment state ((beta) = 0 degree). 中間傾斜角度状態の断面図である。It is sectional drawing of a middle inclination angle state. 中間傾斜角度状態の断面図である。It is sectional drawing of a middle inclination angle state. 最大折り畳み状態の断面図である。It is sectional drawing of the maximum folding state. 最大折り畳み状態の断面図である。It is sectional drawing of the maximum folding state. 角度保持解除状態の断面図である。It is sectional drawing of an angle maintenance cancellation | release state. 角度保持解除状態の断面図である。It is sectional drawing of an angle maintenance cancellation | release state. 展開方向へ戻す状態を示す断面図である。It is sectional drawing which shows the state returned to an expansion | deployment direction. 展開方向へ戻す状態を示す断面図である。It is sectional drawing which shows the state returned to an expansion | deployment direction. 最大展開状態(β=0°)を示した一部破断斜視図である。It is the partially broken perspective view which showed the maximum expansion | deployment state ((beta) = 0 degree). 本発明の無段階角度調整金具を用いた座椅子の作用説明のための側面図である。It is a side view for an operation explanation of a seat chair using a stepless angle adjustment metal fitting of the present invention. 背部の傾斜角度βに対応して制動力Fがいかに変化するかを示すグラフ図である。It is a graph which shows how the braking force F changes corresponding to the inclination | tilt angle (beta) of a back part.

以下、図示の実施の形態に基づき本発明を詳説する。
本発明は、図1に示した背部15と座部16との間に配設される無段階角度調整金具Zであり、例えば、座椅子に適用されるが、場合によっては、ソファー,ヘッドレスト,フットレスト等にも使用可能である。図1、及び、図2の斜視図と、図3の分解斜視図に示すように、この無段階調整金具Zは、座椅子の座部16側に取着(固着)される第1アーム1と、背部15側に取着(固着)される第2アーム2を、備えている。
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
The present invention is a stepless angle adjusting bracket Z disposed between the back portion 15 and the seat portion 16 shown in FIG. 1, and is applied to, for example, a seat chair. It can also be used for footrests. As shown in the perspective views of FIG. 1 and FIG. 2 and the exploded perspective view of FIG. 3, this stepless adjustment fitting Z is a first arm that is attached (fixed) to the seat portion 16 side of the seat. 1 and a second arm 2 attached (fixed) to the back 15 side.

第1アーム1はケース部3を一体に有し、ケース部3は、図2〜図14に示すように、丸味のある三角状左右側壁部3A,3Aと、底壁部3Bと、傾斜壁部3Cとを有しており、ケース部3の前方端に短い丸パイプ部4が一体に連設されている。この丸パイプ部4は、図1のように座部16の枠体の左右パイプ部の後端に、挿入して、溶接やボルトや、リベット等にて、固着される。
そして、第2アーム2は、丸パイプ部5と、被制動用円筒突部6,6を有する板片部7,7とを、溶接等にて一体に構成されている。例えば、円筒突部6は、大き目の貫孔8を有する円環側壁9と、円筒部10とから成る。しかも、2枚の板片部7,7を、対称形に製作して、平坦面を背中合わせとして、溶接等で一体化し、左右両方向に、円筒突部6,6を突出状に形成する。
上述した円筒突部6の円筒部10の外周面部Sが、無段階角度調整において重要な被制動部の機能を発揮する。従って、符号Sは、被制動用円形外周面部と呼ぶこととする。
The 1st arm 1 has the case part 3 integrally, and as shown in FIGS. 2-14, the case part 3 is round triangular left-right side wall part 3A, 3A, bottom wall part 3B, and an inclined wall. 3C, and a short round pipe portion 4 is integrally connected to the front end of the case portion 3. The round pipe portion 4 is inserted into the rear ends of the left and right pipe portions of the frame of the seat portion 16 as shown in FIG. 1, and is fixed by welding, bolts, rivets or the like.
And the 2nd arm 2 is comprised integrally by the round pipe part 5 and the plate piece parts 7 and 7 which have the cylinder protrusions 6 and 6 for a brake. For example, the cylindrical protrusion 6 includes an annular side wall 9 having a large through-hole 8 and a cylindrical portion 10. Moreover, the two plate pieces 7 and 7 are manufactured symmetrically and integrated by welding or the like with the flat surfaces back to back, and the cylindrical protrusions 6 and 6 are formed in a protruding shape in both the left and right directions.
The outer peripheral surface portion S of the cylindrical portion 10 of the cylindrical protrusion 6 described above exhibits an important function of the braked portion in the stepless angle adjustment. Therefore, the symbol S is referred to as a braked circular outer peripheral surface portion.

このようにして、第2アーム2側には、被制動用円形外周面部Sを有し、図4,図5,図14の最大展開状態に於て、水平状丸パイプ部5よりも上方位置に、被制動用円形外周面部Sの円形中心点Os を配設する。
そして、第1アーム1側には、前述の外周面部Sに、 270°以上にわたり(望ましくは約 360°近くまでにわたって)巻込状として外嵌する巻込部21と、この巻込部21の開口端部22,22から突設された弾性変形自在な長脚23・短脚24と、この長脚23・短脚24の先端を第1アーム1のケース部3の側壁部3Aに取着するための第1軸11・第2軸12と、を有している。
上記巻込部21と長脚23と短脚24は、例えば、板素材を打抜き加工(プレス加工)にて打抜形成するのが好ましい。即ち、図3からも明らかなように、2個の(板バネ状の)制動用バネ材20,20を、第1アーム1側に設ける。
Thus, on the second arm 2 side, there is a circular outer peripheral surface portion S to be braked, which is located above the horizontal circular pipe portion 5 in the maximum deployed state of FIGS. The circular center point Os of the circular outer peripheral surface S for braking is disposed.
On the first arm 1 side, a winding portion 21 that is externally fitted as a winding shape over the outer peripheral surface portion S described above over 270 ° (desirably up to about 360 °), and the winding portion 21 The elastically deformable long legs 23 and short legs 24 projecting from the open end portions 22 and 22 and the tips of the long legs 23 and short legs 24 are attached to the side wall portion 3A of the case portion 3 of the first arm 1. And a first shaft 11 and a second shaft 12 for the purpose.
The winding part 21, the long legs 23, and the short legs 24 are preferably formed by punching a plate material by punching (pressing), for example. That is, as is apparent from FIG. 3, two (plate spring-like) braking spring materials 20 and 20 are provided on the first arm 1 side.

さらに説明すれば、この制動用バネ材20,20の巻込部21,21は、自由状態における内径寸法を、外周面部Sの外径寸法よりも、小さく設定する。これによって、巻込部21,21を外周面部Sに外嵌した状態で、巻込部21,21は弾発的縮径力をもって、外周面部Sに弾発的に圧接して、制動力(ブレーキ力)を作用させる。
なお、長脚23・短脚24の先端(下端)には、取付孔25・取付孔26が貫設され、かつ、ケース部3の側壁部3A,3Aには取付孔27,27(図3参照)が貫設され、串挿状に、(リベット等から成る)第1軸11・第2軸12が挿通されて、リベット端部(塑性)加工等にて、ケース部3内に、制動用バネ材20,20を収納すると共に、円筒突部6,6及び板片部7の大半部を収納する。
More specifically, the winding portions 21 and 21 of the braking spring materials 20 and 20 set the inner diameter dimension in the free state to be smaller than the outer diameter dimension of the outer peripheral surface portion S. As a result, in a state where the winding portions 21 and 21 are fitted on the outer peripheral surface portion S, the winding portions 21 and 21 are elastically pressed against the outer peripheral surface portion S with a resilient diameter reducing force, and braking force ( Brake force) is applied.
A mounting hole 25 and a mounting hole 26 are provided at the distal ends (lower ends) of the long legs 23 and the short legs 24, and mounting holes 27 and 27 (see FIG. 3) are provided in the side walls 3A and 3A of the case section 3. The first shaft 11 and the second shaft 12 (consisting of rivets, etc.) are inserted in a skewered manner, and braking is performed in the case portion 3 by rivet end (plastic) processing or the like. The spring members 20 and 20 are accommodated, and most of the cylindrical protrusions 6 and 6 and the plate piece 7 are accommodated.

なお、第3軸13は、側壁部3Aの別の孔28に挿通するが、円筒突部6の貫孔8よりも十分に小径であって、十分な円環状間隙Eを形成する。
従って、この第3軸13は、第1アーム1と第2アーム2とを、枢支するものではない。そして、第1アーム1と第2アーム2とを枢支するのは、制動用バネ材20の巻込部21の内周面部21Aと、円筒突部6の外周面部Sとの、嵌合部位である。(後に詳しく説明するが、)図1に示した(座った人からの)背部15に与えられる大きなベクトル(外力)F0 は、図7に示した如く、上記嵌合部位に於て、ベクトルF0 及び回転モーメントMとして作用すると、力学上、考えることができる。
The third shaft 13 is inserted into another hole 28 of the side wall portion 3A, but has a sufficiently smaller diameter than the through hole 8 of the cylindrical projection 6 and forms a sufficient annular gap E.
Accordingly, the third shaft 13 does not pivotally support the first arm 1 and the second arm 2. Then, the first arm 1 and the second arm 2 are pivotally supported by a fitting portion between the inner peripheral surface portion 21A of the winding portion 21 of the braking spring material 20 and the outer peripheral surface portion S of the cylindrical protrusion 6. It is. A large vector (external force) F 0 given to the back part 15 (from a seated person) shown in FIG. 1 (which will be described in detail later) is a vector at the above-mentioned fitting portion as shown in FIG. When acting as F 0 and the rotational moment M, it can be considered in terms of dynamics.

そして、第1軸11の第1軸心点L1 よりも、第2軸12の第2軸心点L2 及び円形外周面部Sの円形中心点Os を、後方位置に配設する。かつ、円形中心点Os は第2軸心点L2 よりも後方位置とする。なお、ここで、「後方」とは、図1の座椅子に於て、背部15の存在する座椅子の後方を言う。
図7に示した側面視に於て、第1軸心点L1 と円形中心点Os とを結んだ第1直線N1 が、水平線Hに対して成す傾斜角度θは、図15に示した座椅子の使用状態の側面図に於て、背部15の使用状態傾動角度範囲αの略半分に設定されている点が、本発明の大きな特徴である。
Then, the second axial center L 2 of the second shaft 12 and the circular center point Os of the circular outer peripheral surface portion S are arranged at the rear position rather than the first axial center L 1 of the first shaft 11. And the circular center point Os is the position behind the second Jikukokoroten L 2. Here, “rear” refers to the rear of the seat with the back 15 in the seat in FIG.
In the side view shown in FIG. 7, the inclination angle θ formed by the first straight line N 1 connecting the first axial point L 1 and the circular center point Os with respect to the horizontal line H is shown in FIG. In the side view of the use state of the chair, it is a major feature of the present invention that it is set to approximately half of the use state tilt angle range α of the back portion 15.

上記使用状態傾動角度範囲αとは、通常、図5の背部の(水平線に対する)傾斜角度βは、0°から80°乃至90°の間で変化させる必要があるため、80°≦α≦90°であると言える。なお、図15に於て、背部の(水平線に対する)傾斜角度の一例として、0°,40°,80°, 108°の場合を、β0 ,β40,β80,β108 と表示したが、結局、図15の具体例では、α=80°の場合を一例として図示したものである。そして、β80からβ108 の範囲は、最大折り畳み状態(80°)からさらに折り畳んで角度保持を解除させるために背部15を揺動させる角度範囲であって、図8,図9から図10,図11のように、第2アーム2を反時計方向に揺動させて、外周面部Sに対して、制動用バネ材20の巻込部21の弾発的締付力を解除して、角度保持を解除させる角度範囲である。
言い換えると、背部15が座った人Pのもたれ掛る力(ベクトルF0 )を受け止めて、支持するのは、図15の具体例では、β0 からβ80の使用状態傾動角度範囲αが80°の場合を例示しており、前記傾斜角度θは、その使用状態傾動角度範囲αの略半分である。
The above-mentioned use state tilt angle range α is usually defined as 80 ° ≦ α ≦ 90 since the tilt angle β (with respect to the horizontal line) of FIG. 5 needs to be changed between 0 ° and 80 ° to 90 °. It can be said that it is °. In FIG. 15, as an example of the inclination angle of the back (relative to the horizontal line), the cases of 0 °, 40 °, 80 °, and 108 ° are displayed as β 0 , β 40 , β 80 , and β 108. After all, in the specific example of FIG. 15, the case where α = 80 ° is illustrated as an example. Further, the range of β 80 to β 108 is an angle range in which the back portion 15 is swung in order to further fold from the maximum folded state (80 °) and release the angle holding, and FIGS. As shown in FIG. 11, the second arm 2 is swung counterclockwise to release the elastic tightening force of the winding portion 21 of the braking spring material 20 with respect to the outer peripheral surface portion S. This is an angle range for releasing the holding.
In other words, in the specific example of FIG. 15, the use state tilt angle range α of β 0 to β 80 is 80 ° in order to receive and support the leaning force (vector F 0 ) of the person P sitting on the back 15. The tilt angle θ is approximately half of the use state tilt angle range α.

一般式をもって示せば、本発明に於て、上記「略半分」が、θとαとをもって示した下記数式を充足することが好ましい。
(α/2−10°)≦θ≦(α/2+10°)
故に、例えば、α=80°の場合は、30°≦θ≦50°に設定し、α=90°の場合は、35°≦θ≦55°に設定することとなる。
さらに望ましくは、「略半分」として、次の数式を充足するように、θを設定する。
(α/2−5°)≦θ≦(α/2+5°)
故に、例えば、α=80°の場合は、35°≦θ≦45°に設定し、α=90°の場合には、40°≦θ≦50°に設定することとなる。
If it shows with a general formula, in the present invention, it is preferable that the above “substantially half” satisfies the following mathematical formula shown by θ and α.
(Α / 2-10 °) ≦ θ ≦ (α / 2 + 10 °)
Therefore, for example, when α = 80 °, 30 ° ≦ θ ≦ 50 ° is set, and when α = 90 °, 35 ° ≦ θ ≦ 55 ° is set.
More desirably, θ is set so that “substantially half” is satisfied.
(Α / 2-5 °) ≦ θ ≦ (α / 2 + 5 °)
Therefore, for example, when α = 80 °, 35 ° ≦ θ ≦ 45 ° is set, and when α = 90 °, 40 ° ≦ θ ≦ 50 ° is set.

次に、長脚23と短脚24と巻込部21から成る制動用バネ材(弾性バンド部材)20が、(図15の)座った人Pが背部15に与える外力(ベクトル)F0 を受け持つこと、即ち、制動用バネ材(弾性バンド部材)20を介して、座った人Pが背部15に与える外力(ベクトル)F0 を 100%、第1アーム1側へ伝達すること、に関して、以下説明する。 Next, the braking spring material (elastic band member) 20 composed of the long legs 23, the short legs 24 and the winding part 21 applies an external force (vector) F 0 applied to the back part 15 by the seated person P (of FIG. 15). With regard to handling, that is, 100% of the external force (vector) F 0 applied to the back 15 by the seated person P is transmitted to the first arm 1 side through the braking spring material (elastic band member) 20. This will be described below.

左右一対の巻込部21と、左右一対の円筒部10の外周面部Sとの嵌合によってのみ、第2アーム2が第1アーム1に対して揺動可能に枢支されている構造であることは、第3軸13が(円環状間隙Eを介して)貫孔8に遊嵌されている点から、明らかである。
図1,図7,図15に示すように、第2アーム2側の背部15に作用するベクトルF0 が、外周面部Sと巻込部21との嵌合部位を介して、さらに、長脚23と短脚24を介して(かつ、第1軸11と第2軸12を介して)、第2アーム2側から第1アーム1側へ 100%伝達されるように構成されている。
図7に示すように、大きな外力(ベクトル)F0 は、全て外周面部Sと巻込部21の嵌合部位を介して伝達され、このベクトルF0 によって、第1直線N1 が後下方(図6の矢印R参照)へ傾動するように、長脚23・短脚24・巻込部21から成る制動用バネ材20が弾性変形しつつ、巻込部21が外周面部Sに追加圧接力を付与する。
The second arm 2 is pivotally supported with respect to the first arm 1 only by fitting between the pair of left and right winding portions 21 and the outer peripheral surface portion S of the pair of left and right cylindrical portions 10. This is clear from the point that the third shaft 13 is loosely fitted into the through hole 8 (via the annular gap E).
As shown in FIGS. 1, 7, and 15, the vector F 0 acting on the back portion 15 on the second arm 2 side further passes through the fitting portion of the outer peripheral surface portion S and the winding portion 21, and the long legs It is configured such that 100% is transmitted from the second arm 2 side to the first arm 1 side via the 23 and the short legs 24 (and via the first shaft 11 and the second shaft 12).
As shown in FIG. 7, a large external force (vector) F 0 is all transmitted through the fitting portion between the outer peripheral surface portion S and the winding portion 21, and the first straight line N 1 is rearward and downward (by this vector F 0 ). As shown in FIG. 6 (see arrow R), the braking spring material 20 comprising the long legs 23, the short legs 24, and the winding portion 21 is elastically deformed, and the winding portion 21 is applied to the outer peripheral surface portion S with additional pressure contact force. Is granted.

既述の如く、自由状態下で巻込部21の内径寸法は外周面部Sの外径寸法よりも、小さく設定されており、常時弾発的に圧接力(基本的圧接力)を発生しているが、(図1と図15のように、)座った人PからのベクトルF0 が背部15に付与されると、図7の矢印Mにて示す回転モーメントにて巻込部21が嵌合部位の摩擦力にて巻込状に締付けると同時に、ベクトルF0 によって、第1軸11と第2軸12にて固着された長脚23・短脚24の先端(下端)を(静止した)ベースとして、巻込部21(円筒突部6)が、図6の矢印Rの方向に微小移動するように、制動用バネ材20が曲げ弾性変形及び部分的圧縮変形を発生し、いわば巻込部21の外周面部Sに対する締付力が強力に発生し、もって強力な制動力(ブレーキ力)を生じ、外周面部Sとの相対的滑りを強力に阻止できる構造である。 As described above, the inner diameter dimension of the winding portion 21 is set smaller than the outer diameter dimension of the outer peripheral surface portion S in a free state, and the pressure contact force (basic pressure contact force) is constantly generated. However, when the vector F 0 from the seated person P is applied to the back portion 15 (as in FIGS. 1 and 15), the winding portion 21 is fitted by the rotational moment indicated by the arrow M in FIG. At the same time, the front ends (lower ends) of the long legs 23 and the short legs 24 fixed by the first shaft 11 and the second shaft 12 are stopped (by the vector F 0 ). ) As a base, the braking spring material 20 undergoes bending elastic deformation and partial compression deformation so that the winding portion 21 (cylindrical protrusion 6) moves slightly in the direction of arrow R in FIG. Tightening force against the outer peripheral surface portion S of the insert portion 21 is generated strongly, thereby generating a strong braking force (braking force) and strong relative sliding with the outer peripheral surface portion S. It is a blocking can structure.

また、弾性バンド部材としての制動用バネ材20の巻込部21(の全体又は大部分)は、図14に示すように、ラジアル方向の幅寸法Wが、アキシャル方向の厚さ寸法Tよりも大きく、いわゆる縦添え巻きとする。このように、W>Tとすることにより、(図6と図7等をもって述べた)外力(ベクトル)F0 と回転モーメントMに対応して、矢印R方向へ適度の抵抗を示しつつ、外周面部Sに対する強力な締付力(制動力)を発生できる。(即ち、W≦Tの場合には、矢印R方向に過大に弾性変形してしまって、締付力を十分に発生できない。) Further, as shown in FIG. 14, the winding portion 21 of the braking spring material 20 as an elastic band member (whole or most) has a radial width dimension W larger than an axial thickness dimension T. Large, so-called vertical wrapping. In this way, by setting W> T, the outer periphery (shown with FIGS. 6 and 7, etc.) shows an appropriate resistance in the direction of the arrow R corresponding to the external force (vector) F 0 and the rotational moment M. A strong tightening force (braking force) for the surface portion S can be generated. (That is, in the case of W ≦ T, it is excessively elastically deformed in the direction of the arrow R, and a sufficient tightening force cannot be generated.)

図16は、横軸に、座椅子の背部15の傾斜角度βを採り、縦軸に制動力M0 を採った実測図であり、図15に例示したように傾動角度範囲αを80°とすると共に、図7に示した傾斜角度θを40°に設定した本発明実施例を実線をもって示し、他方、点線はθを0°に設定した場合の比較例を示す。
この比較例では、背部15が最大展開状態近傍(βが0°近くの範囲)では強大な制動力M0 を発生する。しかしながら、座った人Pから受ける外力(ベクトル)F0 に伴って発生する最大予測回転モーメント(必要制動力)を示す直線Mx に対して、背部15が起立して(折り畳まれて)、最大折り畳み状態に近づくと、その直線Mx 未満まで低下してしまうことが判る。即ち、比較例では、最大予測回転モーメント(必要制動力)の値未満になってしまう領域(傾斜角度β)が存在し、座った人Pが急激に背部15へもたれ掛った際は、背部15が後方へ倒れて、危険である。
16, the horizontal axis takes the inclination angle β of the back 15 of seat, a measured view taken braking force M 0 on the vertical axis, 80 ° tilt angle range α as illustrated in FIG. 15 In addition, the embodiment of the present invention in which the inclination angle θ shown in FIG. 7 is set to 40 ° is shown by a solid line, while the dotted line shows a comparative example in which θ is set to 0 °.
In this comparative example, a strong braking force M 0 is generated when the back portion 15 is in the vicinity of the maximum deployed state (a range where β is close to 0 °). However, the back portion 15 stands up (folds) with respect to the straight line Mx indicating the maximum predicted rotational moment (required braking force) generated with the external force (vector) F 0 received from the seated person P, and the maximum folding is performed. It turns out that it will fall to less than the straight line Mx when it approaches a state. That is, in the comparative example, there is a region (inclination angle β) that is less than the value of the maximum predicted rotational moment (required braking force), and when the seated person P suddenly leans on the back 15, the back 15 Falls backwards and is dangerous.

これに対し、本願発明の実施例では、背部15の傾斜角度範囲αの半分の傾斜角度40°にて最大の制動力M0 を発生し、傾斜角度βが0°から80°の全傾斜角度βにて、常に前記直線Mx を越えた大きな制動力M0 を発生でき、図15に示した背部15が、最大展開状態から中間傾斜状態を経て最大折り畳み状態にわたる傾動角度範囲αの全域にて、安定して、各傾斜角度βを維持できて、安全性に優れていることを示す。 On the other hand, in the embodiment of the present invention, the maximum braking force M 0 is generated at an inclination angle 40 ° which is half of the inclination angle range α of the back portion 15 and the entire inclination angle β is 0 ° to 80 °. At β, a large braking force M 0 that always exceeds the straight line Mx can be generated, and the back portion 15 shown in FIG. 15 extends over the entire tilt angle range α from the maximum unfolded state through the intermediate inclined state to the maximum folded state. It shows that the tilt angle β can be stably maintained and the safety is excellent.

ところで、本発明は、制動力解除手段を備え、この解除手段は、極めて簡易かつ簡素な構造をもって構成される。即ち、図3〜図14に於て、巻込部21の開口端部22,22の対向面の一方(長脚23側)には、深凹窪部31と浅凹窪部32を近接して並設し、対向面の他方(短脚24)にはラジアル方向平滑面33とラジアル外端小突部34を形成する。浅凹窪部32をラジアル外方側に配設する。浮動カムピン30を、上記平滑面33と、深凹窪部31と浅凹窪部32との間隙部に、介装して、このカムピン30が深凹窪部31に存在するときは、巻込部21は、その弾発付勢力をもって、外周面部Sを圧接自在であり、かつ、図7に示したように、外力(ベクトル)F0 が背部15に作用した際に一層強力に巻込部21が外周面部Sを締付ける(圧接する)ことも、可能な状態―――制動可能状態―――にある(図4,図5,図6,図7,図8,図9,図14参照)。 By the way, this invention is provided with the braking force cancellation | release means, and this cancellation | release means is comprised with a very simple and simple structure. That is, in FIG. 3 to FIG. 14, the deep concave recess 31 and the shallow concave recess 32 are adjacent to one of the opposing surfaces of the opening end portions 22 and 22 (long leg 23 side) of the winding portion 21. A radial direction smooth surface 33 and a radial outer end small protrusion 34 are formed on the other (short leg 24) of the opposing surface. The shallow concave portion 32 is disposed on the radially outer side. When the floating cam pin 30 is interposed in the gap between the smooth surface 33 and the deep concave recess 31 and the shallow concave recess 32, and the cam pin 30 exists in the deep concave recess 31, The portion 21 is capable of pressing the outer peripheral surface portion S with its elastic urging force, and more powerfully entrained when the external force (vector) F 0 acts on the back portion 15 as shown in FIG. 21 is also in a state where it is possible to tighten (pressure contact) the outer peripheral surface S --- a brakeable state-(see FIGS. 4, 5, 6, 7, 8, 9 and 14). ).

そして、カムピン30が浅凹窪部32に存在するときは、巻込部21は、外周面部Sを圧接しない状態となり、(制動力が作用しない)フリー状態として、第2アーム2は、自由に揺動できる(図10,図11,図12,図13参照)。但し、図15のβ108 の状態下では、図10に示すように、第1アーム1のケース部3の一部3Αと、第2アーム2の一部2Aが当接し、それ以上は折り畳まれないで停止させている。
このように、制動力作動状態と制動力解除状態とに切換るように、平滑面33と、深凹窪部31・浅凹窪部32の間隙寸法、及び、カムピン30の外径寸法を、設定する。
なお、図示省略するが、長脚23・短脚24の対向面に、深凹窪部31・浅凹窪部32を配設するも、自由である。
When the cam pin 30 is present in the shallow recess 32, the winding portion 21 is in a state in which the outer peripheral surface portion S is not pressed against the outer peripheral surface portion S, and the second arm 2 is free to be in a free state (no braking force is applied). Can swing (see Figs. 10, 11, 12, and 13). However, under the state of β 108 in FIG. 15, as shown in FIG. 10, the part 3 of the case part 3 of the first arm 1 and the part 2A of the second arm 2 are in contact with each other, and the further part is folded. Stop without.
In this way, the gap between the smooth surface 33, the deep recess 31 and the shallow recess 32, and the outer diameter of the cam pin 30 so as to switch between the braking force operating state and the braking force release state, Set.
Although not shown in the figure, it is also possible to dispose the deep recesses 31 and the shallow recesses 32 on the opposing surfaces of the long legs 23 and the short legs 24.

次に、図10・図11から図12・図13の状態へ揺動する際(即ち、展開方向へ戻す際)には、カムピン30は、浅凹窪部32に存在し、巻込部21の内周面は外周面部Sから少し遊離しており、自由に第2アーム2が図の時計廻りに揺動できる。ところが、図12に示すように、第2アーム2の板片部7には、制動可能状態への切換用小突部35が設けられており、図12・図13の状態から第2アーム2を(図の時計方向に)さらに(展開)揺動させると、この小突部35によって、カムピン30がラジアル内方向へ押圧されて、浅凹窪部32から深凹窪部31へ(強制的に)移されて、図14と図4・図5に示す制動可能状態に切換る。   Next, when swinging from the state shown in FIGS. 10 and 11 to the state shown in FIGS. 12 and 13 (that is, when returning to the unfolding direction), the cam pin 30 exists in the shallow recess 32 and the winding portion 21 The inner peripheral surface is slightly separated from the outer peripheral surface portion S, and the second arm 2 can freely swing clockwise in the figure. However, as shown in FIG. 12, the plate piece portion 7 of the second arm 2 is provided with a small projection 35 for switching to a brakeable state. Is further swung out (in the clockwise direction in the figure), the cam pin 30 is pushed radially inward by the small protrusions 35 and is forced from the shallow recesses 32 to the deep recesses 31 (forced). To the brakeable state shown in FIG. 14 and FIGS.

長脚23と短脚24を有する制動用バネ材20の長脚23と短脚24を前と後ろに配設し、かつ、既説の構成としたので、第2アーム2を図の反時計方向へ揺動して、図6・図7を経て図8・図9の状態まで折り畳むことは、背部15を少しの手の力をもって起こしてやれば、容易である。即ち、外力F0 が図1,図7に示す方向に作用するときには、本発明に係る制動用バネ材20は外周面部Sを強力に締付けて(圧接して)、制動作用をなすのであるが、背部15を起立方向(折畳方向)に人力にて揺動させる際は、軽い摩擦力が作用するのみであって、容易に起こすことができる。
図8・図9の状態から、さらに、図の反時計方向へ揺動させると、図10・図11に示すように、カムピン30が、浅凹窪部32に押込まれるが、この押込みのための押込用勾配段付部(非制動への切換用勾配段付部)36が、第2アーム2の板片部7に形成されている。
Since the long leg 23 and the short leg 24 of the braking spring material 20 having the long leg 23 and the short leg 24 are arranged in the front and back, and the configuration described above, the second arm 2 is counterclockwise as shown in the figure. It is easy to swing in the direction and fold to the state shown in FIGS. 8 and 9 through FIGS. 6 and 7 if the back 15 is raised with a little hand force. That is, when the external force F 0 acts in the direction shown in FIGS. 1 and 7, the braking spring material 20 according to the present invention strongly tightens (presses against) the outer peripheral surface portion S to perform a braking action. When the back portion 15 is swung by a human force in the standing direction (folding direction), only a light frictional force acts and can be easily raised.
8 and 9, when the cam pin 30 is further swung counterclockwise, the cam pin 30 is pushed into the shallow recess 32 as shown in FIGS. 10 and 11. An inclining stepped portion for pressing (gradient stepped portion for switching to non-braking) 36 is formed in the plate piece portion 7 of the second arm 2.

以上述べたように、制動力解除手段は、深凹窪部31と浅凹窪部32、及び、浮動カムピン30と、押込用勾配段付部36等の簡易かつ簡素な構造にて構成され、誤動作なく確実に切換作動する。
また、本発明は制動力復元手段を具備し、その構成は、深凹窪部31と浅凹窪部32、及び、浮動カムピン30と、制動への切換用小突部35等から成り、簡易かつ簡素な構造であって、誤動作なく、確実な切換作動を行う。
As described above, the braking force releasing means is configured with a simple and simple structure such as the deep concave recess 31 and the shallow concave recess 32, the floating cam pin 30, the pushing gradient stepped portion 36, and the like. Switch operation reliably without malfunction.
Further, the present invention includes a braking force restoring means, and the configuration thereof includes a deep concave recess 31, a shallow concave recess 32, a floating cam pin 30, a small protrusion 35 for switching to braking, and the like. In addition, it has a simple structure and performs a reliable switching operation without malfunction.

ところで、外周面部Sに、ブレーキシューの材質を用いたり、ショットピーニング又はプレス等で粗面として、摩擦係数を高めて制動用バネ材20によって、一層確実に、滑りを防止して、座椅子の背部15が不意に後方へ倒れる危険を防止することも好ましい。   By the way, the material of the brake shoe is used for the outer peripheral surface portion S, or the surface is made rough by shot peening or pressing, and the friction coefficient is increased and the braking spring material 20 prevents the slip more reliably. It is also preferable to prevent the risk of the back portion 15 of the vehicle unexpectedly falling backward.

本発明は、以上述べたように、座椅子の座部16側に取着される第1アーム1と、背部15側に取着される第2アーム2とを、備え;上記第2アーム2側には、被制動用円形外周面部Sを有し;上記第1アーム1側には、上記外周面部Sに巻込状に外嵌されて弾発的縮径力をもって上記外周面部Sに弾発的に圧接する巻込部21と、該巻込部21の開口端部22,22から突設された弾性変形自在な長脚23・短脚24と、該長脚23・短脚24の先端を第1アーム1に取着する第1軸11・第2軸12と、を有し;上記第1軸11の第1軸心点L1 よりも、上記第2軸12の第2軸心点L2 及び上記円形外周面部Sの円形中心点Os を、後方位置に配設して;上記第1軸心点L1 と上記円形中心点Os とを結んだ第1直線N1 が水平線Hに対して成す傾斜角度θを、上記背部15の使用状態傾動角度範囲αの略半分となるように設定した構成であるので、部品点数も少なく、小型であり、手動操作レバーを省略できた簡素な構成であって、座椅子として特に好適である。しかも、背部15を無段階で所望の角度βまで起立してゆけば、直ちに、その所望角度で強力に、(後方への)倒れが阻止され、座った人Pが急激に背部15へもたれて、大きな外力Fが作用しても、不意に、ズルズルと滑り揺動する危険性がない。
特に、座椅子として使用される(80°〜90°の)傾動角度範囲αの背部のいずれの傾斜角度βに於ても、略均等な制動力を発揮させることができる。
As described above, the present invention includes the first arm 1 attached to the seat portion 16 side of the seat and the second arm 2 attached to the back portion 15 side; On the second side, there is a circular outer peripheral surface portion S for braking; on the first arm 1 side, the outer peripheral surface portion S is fitted on the outer peripheral surface portion S so as to be wound around and is elastically reduced in diameter. A winding part 21 that is elastically pressed, an elastically deformable long leg 23 and a short leg 24 projecting from the open ends 22 and 22 of the winding part 21, and the long leg 23 and the short leg 24 A first shaft 11 and a second shaft 12 for attaching the front end of the second shaft 12 to the first arm 1; the second shaft 12 has a second axis 12 that is more than the first axis L 1 of the first shaft 11. An axial center point L 2 and a circular center point Os of the circular outer peripheral surface portion S are arranged at a rear position; a first straight line N 1 connecting the first axial center point L 1 and the circular center point Os is The inclination angle θ formed with respect to the horizon H is the usage of the back 15 Since at the set configured to be substantially half of the tilting angle range alpha, the number of parts reduced, a compact, a simple configuration in which can omit the manual operation lever, is particularly suitable as a chair seat. Moreover, if the back portion 15 is stepped up to a desired angle β steplessly, immediately and powerfully at that desired angle, the fall (rearward) is prevented, and the seated person P suddenly leans against the back portion 15. Even if a large external force F is applied, there is no risk of unexpected sliding and swinging.
In particular, substantially equal braking force can be exhibited at any inclination angle β of the back part of the inclination angle range α (80 ° to 90 °) used as a seat chair.

また、上記略半分とは、上記θとαとをもって示した不等式(α/2−10°)≦θ≦(α/2+10°)を充足させているので、座椅子に使用した場合に、図16に示したように、背部の傾斜角度βの現実の使用範囲に於て、必要制動力(最大予想回転モーメント)Mx よりも、十分に大きくすることが、可能となった。   In addition, the above-mentioned substantially half means that the inequality (α / 2-10 °) ≦ θ ≦ (α / 2 + 10 °) shown by θ and α is satisfied. As shown in FIG. 16, it is possible to make it sufficiently larger than the required braking force (maximum expected rotational moment) Mx in the actual use range of the back inclination angle β.

また、上記巻込部21と上記外周面部Sとの嵌合によって第2アーム2が第1アーム1に対して揺動可能に枢支され、上記第2アーム2側の上記背部15に作用するベクトルF0 が、上記外周面部Sと上記巻込部21との嵌合部位を介して、さらに、上記長脚23と短脚24を介して、上記第1アーム1側へ 100%伝達されるように構成され、上記ベクトルF0 によって、上記第1直線N1 が後下方Rへ傾動するように、上記長脚23・短脚24・巻込部21から成る制動用バネ材20が弾性変形しつつ該巻込部21が上記外周面部Sに追加圧接力を付与するように構成したので、(従来のように、回転力のみを制動する無段階角度調整金具に比べて)力学上、極めて合理的に、制動用バネ材20の弾性的曲げ変形及び弾性的バンド絞り変形等による、外周面部Sへの圧接力を、活用した発明であるといえる。 Further, the second arm 2 is pivotally supported with respect to the first arm 1 by fitting the winding portion 21 and the outer peripheral surface portion S, and acts on the back portion 15 on the second arm 2 side. The vector F 0 is transmitted 100% to the first arm 1 side via the fitting portion between the outer peripheral surface portion S and the winding portion 21 and further via the long legs 23 and short legs 24. The braking spring material 20 comprising the long legs 23, the short legs 24, and the winding portion 21 is elastically deformed so that the first straight line N 1 tilts rearwardly and downwardly R by the vector F 0 . However, since the winding portion 21 is configured to apply an additional pressure contact force to the outer peripheral surface portion S (compared to a stepless angle adjusting bracket that brakes only the rotational force as in the prior art), it is extremely dynamic. Reasonably, the pressure contact force on the outer peripheral surface S due to elastic bending deformation and elastic band drawing deformation of the spring material 20 for braking is reduced. It can be said to be utilizing the invention.

また、上記制動用バネ材20の上記巻込部21は、ラジアル方向の幅寸法Wが、アキシャル方向の厚さ寸法Tよりも大きな形状であるので、全体が小型の制動用バネ材20をもって、強大かつ安定した制動力を発生可能となる。   Further, since the winding portion 21 of the braking spring material 20 has a radial width dimension W larger than the axial thickness dimension T, the whole has a small braking spring material 20. A powerful and stable braking force can be generated.

1 第1アーム
2 第2アーム
11 第1軸
12 第2軸
15 背部
16 座部
20 制動用バネ材
21 巻込部
22 開口端部
23 長脚
24 短脚
0 ベクトル
H 水平線
1 第1軸心点
2 第2軸心点
1 第1直線
Os 円形中心点
R 後下方
S 外周面部
T 厚さ寸法
W 幅寸法
α 傾動角度範囲
β 背部の傾斜角度
θ 傾斜角度
1 First arm 2 Second arm
11 Axis 1
12 Axis 2
15 back
16 Seat
20 Braking spring material
21 Winding part
22 Open end
23 Long legs
24 Short legs F 0 vector H Horizontal line
L 1 1st axis center point L 2 2nd axis center point N 1 1st straight line Os Circular center point R Rear lower part S Outer peripheral surface part T Thickness dimension W Width dimension α Inclination angle range β Inclination angle of the back θ Inclination angle

Claims (4)

座椅子の座部(16)側に取着される第1アーム(1)と、背部(15)側に取着される第2アーム(2)とを、備え、
上記第2アーム(2)側には、被制動用円形外周面部(S)を有し、
上記第1アーム(1)側には、上記外周面部(S)に巻込状に外嵌されて弾発的縮径力をもって上記外周面部(S)に弾発的に圧接する巻込部(21)と、該巻込部(21)の開口端部(22)(22)から突設された弾性変形自在な長脚(23)・短脚(24)と、該長脚(23)・短脚(24)の先端を第1アーム(1)に取着する第1軸(11)・第2軸(12)と、を有し、
上記第1軸(11)の第1軸心点(L1 )よりも、上記第2軸(12)の第2軸心点(L2 )及び上記円形外周面部(S)の円形中心点(Os )を、後方位置に配設して、
上記第1軸心点(L1 )と上記円形中心点(Os )とを結んだ第1直線(N1 )が水平線(H)に対して成す傾斜角度(θ)を、上記背部(15)の使用状態傾動角度範囲(α)の略半分となるように設定したことを特徴とする無段階角度調整金具。
A first arm (1) attached to the seat (16) side of the chair and a second arm (2) attached to the back (15) side;
On the second arm (2) side, there is a circular outer peripheral surface portion (S) for braking,
On the side of the first arm (1), a winding part (which is externally fitted to the outer peripheral surface part (S) in a winding shape and is elastically pressed against the outer peripheral surface part (S) with a resilient diameter reducing force ( 21), elastically deformable long legs (23) and short legs (24) projecting from the open ends (22) and (22) of the winding part (21), and the long legs (23) and A first shaft (11) and a second shaft (12) for attaching the tip of the short leg (24) to the first arm (1);
Than the first axis (L 1 ) of the first axis (11), the second axis (L 2 ) of the second axis (12) and the circular center point (S) of the circular outer peripheral surface (S) Os) in the rear position,
An inclination angle (θ) formed by a first straight line (N 1 ) connecting the first axial center point (L 1 ) and the circular center point (Os) with respect to a horizontal line (H) is defined as the back portion (15). A stepless angle adjusting bracket, which is set to be approximately half of the use state tilt angle range (α).
上記略半分とは、上記(θ)と(α)とをもって示した不等式(α/2−10°)≦θ≦(α/2+10°)を充足している請求項1記載の無段階角度調整金具。   2. The stepless angle adjustment according to claim 1, wherein said substantially half satisfies the inequality (α / 2-10 °) ≦ θ ≦ (α / 2 + 10 °) indicated by (θ) and (α). Hardware. 上記巻込部(21)と上記外周面部(S)との嵌合によって第2アーム(2)が第1アーム(1)に対して揺動可能に枢支され、上記第2アーム(2)側の上記背部(15)に作用するベクトル(F0 )が、上記外周面部(S)と上記巻込部(21)との嵌合部位を介して、さらに、上記長脚(23)と短脚(24)を介して、上記第1アーム(1)側へ 100%伝達されるように構成され、上記ベクトル(F0 )によって、上記第1直線(N1 )が後下方(R)へ傾動するように、上記長脚(23)・短脚(24)・巻込部(21)から成る制動用バネ材(20)が弾性変形しつつ該巻込部(21)が上記外周面部(S)に追加圧接力を付与するように構成した請求項1又は2記載の無段階角度調整金具。 The second arm (2) is pivotably supported with respect to the first arm (1) by fitting the winding portion (21) and the outer peripheral surface portion (S), and the second arm (2). A vector (F 0 ) acting on the back portion (15) on the side is further connected to the long leg (23) and the short leg via the fitting portion between the outer peripheral surface portion (S) and the winding portion (21). 100% is transmitted to the first arm (1) side through the leg (24), and the first straight line (N 1 ) is moved rearward and downward (R) by the vector (F 0 ). As the brake spring material (20) composed of the long legs (23), short legs (24), and winding part (21) is elastically deformed, the winding part (21) is connected to the outer peripheral surface part (21). The stepless angle adjusting bracket according to claim 1 or 2, wherein an additional pressure contact force is applied to S). 上記制動用バネ材(20)の上記巻込部(21)は、ラジアル方向の幅寸法(W)が、アキシャル方向の厚さ寸法(T)よりも大きな形状である請求項3記載の無段階角度調整金具。   The steplessly according to claim 3, wherein the winding portion (21) of the braking spring material (20) has a radial width dimension (W) larger than an axial thickness dimension (T). Angle adjustment bracket.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101538031B1 (en) * 2014-12-31 2015-07-22 허남요 The chair that have a variable armrest
WO2016010444A1 (en) * 2014-07-18 2016-01-21 Stalmot & Wolmet Spółka Akcyjna Stepless joint, especially for upholstered furniture
EP3031357A1 (en) * 2014-12-09 2016-06-15 Schätti AG Pivotal fitting
WO2016113173A1 (en) * 2015-01-14 2016-07-21 Hettich Franke Gmbh & Co. Kg Pivoting fitting, piece of furniture, and motor vehicle seat

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JPS58173352U (en) * 1982-05-13 1983-11-19 池田物産株式会社 Seat back tilt angle adjustment mechanism
JPH0919339A (en) * 1995-07-03 1997-01-21 Hikari:Kk Joint metal fixture
JP5232317B1 (en) * 2012-05-01 2013-07-10 株式会社ヒカリ Angle adjuster

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JPS58173352U (en) * 1982-05-13 1983-11-19 池田物産株式会社 Seat back tilt angle adjustment mechanism
JPH0919339A (en) * 1995-07-03 1997-01-21 Hikari:Kk Joint metal fixture
JP5232317B1 (en) * 2012-05-01 2013-07-10 株式会社ヒカリ Angle adjuster

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016010444A1 (en) * 2014-07-18 2016-01-21 Stalmot & Wolmet Spółka Akcyjna Stepless joint, especially for upholstered furniture
EP3031357A1 (en) * 2014-12-09 2016-06-15 Schätti AG Pivotal fitting
KR101538031B1 (en) * 2014-12-31 2015-07-22 허남요 The chair that have a variable armrest
WO2016113173A1 (en) * 2015-01-14 2016-07-21 Hettich Franke Gmbh & Co. Kg Pivoting fitting, piece of furniture, and motor vehicle seat
CN107205552A (en) * 2015-01-14 2017-09-26 海蒂诗弗兰克有限及两合公司 Pivotal fittings, furniture and automobile seat

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