JP5584087B2

JP5584087B2 - Angle adjustment bracket for seat and connecting structure for seat

Info

Publication number: JP5584087B2
Application number: JP2010234231A
Authority: JP
Inventors: 直伸山下
Original assignee: Koyo Giken KK
Current assignee: Koyo Giken KK
Priority date: 2010-10-19
Filing date: 2010-10-19
Publication date: 2014-09-03
Anticipated expiration: 2030-10-19
Also published as: JP2012085766A

Description

本発明は、座イス用角度調整金具及び座イス用連結構造に関する。 The present invention relates to an angle adjusting bracket for a seat and a connection structure for a seat.

従来、座イスの座部と背部の間の角度を調整するための座イス用角度調整金具は、座イス座部用のフレームが取着されるパイプ状の第１取付部と、座イス背部用のフレームが取着されるパイプ状の第１取付部を有していた。
そして、第１取付部に、座イス座部用のフレームのパイプ状端部を外嵌させ、第２取付部に、座イス背部用のフレームのパイプ状端部を外嵌させて、座イス用角度調整金具と座イス用フレームを接続する連結構造であった（例えば、特許文献１参照）。 Conventionally, an angle adjusting bracket for a seat chair for adjusting an angle between a seat portion and a back portion of a seat chair includes a pipe-shaped first mounting portion to which a frame for the seat chair seat is attached, and a seat chair back portion. A pipe-shaped first mounting portion to which the frame for mounting is attached.
Then, the pipe-shaped end portion of the frame for the seat chair seat is externally fitted to the first mounting portion, and the pipe-shaped end portion of the frame for the seat back portion is externally fitted to the second mounting portion. It was the connection structure which connects the angle adjusting bracket for seats, and the frame for seat chairs (for example, refer patent document 1).

登録実用新案第３０４５０１４号公報Registered Utility Model No. 3045014

しかし、座イス用フレームの端部を、角度調整金具の取付部に外嵌させる際に、取付部の軸心廻りに角度調整金具が回転してしまい、適切な姿勢で連結できずに角度調整金具が側方へ傾いてしまうという問題があった。つまり、適切な姿勢や位置で連結できないと、座部と背部がスムーズに揺動できないといった問題や、ギアの噛合状態が外れやすくなる場合や、ギア歯の欠けや飛び等が発生する問題があった。
また、フレームの端部と取付部との抜けを防止するために、取付部に外嵌したフレームの端部と取付部とを圧着状に塑性加工すると、取付部以外の箇所（ケース部やギア部、枢着孔部等）に変形が発生して、各部品との位置関係や角度調整機能に悪影響を及ぼしスムーズな角度調整が困難になるという問題があった。
また、角度調整金具が変形しない程度の弱い押圧力で塑性加工すると、抜け止めや廻り止めを確実に行えないという問題があった。 However, when the end of the seat chair frame is fitted to the mounting part of the angle adjusting bracket, the angle adjusting bracket rotates around the axis of the mounting section, and the angle cannot be connected in an appropriate posture. There was a problem that the metal fitting tilted to the side. In other words, if it cannot be connected in an appropriate posture or position, there are problems such as the seat part and the back part not being able to swing smoothly, the gear meshing state being easily disengaged, and the gear teeth being missing or jumping. It was.
In addition, in order to prevent the end of the frame and the mounting portion from coming off, if the end of the frame and the mounting portion that are externally fitted to the mounting portion are subjected to plastic processing in a crimped manner, a portion other than the mounting portion (the case portion or the gear) Part, pivot hole part, etc.), and the positional relationship with each component and the angle adjustment function are adversely affected, making smooth angle adjustment difficult.
Further, when plastic working is performed with a weak pressing force that does not deform the angle adjusting bracket, there has been a problem that it is impossible to reliably prevent slipping or turning.

そこで、本発明は、座イス用角度調整金具を適切な姿勢かつ適切な位置で、容易かつ強固に座イス用フレームに連結可能な座イス用角度調整金具及び座イス用連結構造の提供を目的とする。 Accordingly, the present invention has an object to provide an angle adjustment fitting for a seat and an attachment structure for a seat that can be easily and firmly connected to the frame for the seat with an appropriate posture and an appropriate position. And

上記目的を達成するために、本発明の座イス用角度調整金具は、座イス座部用の第１フレームのパイプ状の端部が外嵌されるパイプ状の第１取付部と、座イス背部用の第２フレームのパイプ状の端部が外嵌され上記第１取付部に対して水平軸心廻りに揺動するパイプ状の第２取付部と、を有し、上記第１取付部と上記第２取付部の間の角度が調整自在な座イス用角度調整金具に於て、上記第１取付部は、上記第１フレームの端部に塑性加工によって形成される第１突隆部が突入するための位置決め用の第１貫孔を、座イス使用状態で使用者が接近する表て面側と該表て面側と反対側の裏面側に有し、上記第２取付部は、上記第２フレームの端部に塑性加工によって形成される第２突隆部が突入するための位置決め用の第２貫孔を、上記表て面側と上記裏面側に有し、上記第２取付部の軸心の揺動軌跡を含む鉛直平面上に、上記表て面側と上記裏面側の上記第１貫孔の孔軸心、及び、上記表て面側と上記裏面側の上記第２貫孔の孔軸心を配設し、さらに、上記表て面側の上記第１貫孔と上記裏面側の上記第１貫孔との上記第１取付部の長手方向位置を相違させ、上記表て面側の上記第２貫孔と上記裏面側の上記第２貫孔との上記第２取付部の長手方向位置を相違させたものである。 In order to achieve the above object, the angle adjusting bracket for a seat chair according to the present invention includes a pipe-shaped first mounting portion on which a pipe-shaped end portion of a first frame for a seat chair seat is fitted, and a seat chair. A pipe-shaped second mounting portion that is fitted around the pipe-shaped end of the second frame for the back portion and swings around the horizontal axis with respect to the first mounting portion, and the first mounting portion In the angle adjustment bracket for seat chair, the angle between the first mounting portion and the second mounting portion is adjustable, the first mounting portion is a first ridge formed by plastic working on an end portion of the first frame. Has a first through hole for positioning into the front surface side where the user approaches in the state where the seat chair is used and the rear surface side opposite to the front surface side, and the second mounting portion is , the second through-hole for positioning for the second突隆portion formed by plastic working to the end portion of the second frame rushes, surface Te table And on the back surface side, on the vertical plane including the swing trajectory of the axis of the second attachment portion, the hole axial center of the first through hole on the surface side and the back surface side, and A hole axis of the second through hole on the front side and the back side is disposed, and the first through hole on the front side and the first through hole on the back side are further provided. The longitudinal position of the first mounting portion is made different, and the longitudinal position of the second mounting portion between the second through hole on the front side and the second through hole on the back side is made different. .

本発明の座イス用連結構造は、角度が相互に調整自在なパイプ状の第１・第２取付部を有する座イス用角度調整金具の該第１・第２取付部と、座イス座部用・背部用の第１・第２フレームのパイプ状の端部と、を連結する座イス用連結構造に於て、上記第１取付部に位置決め用の第１貫孔を、座イス使用状態で使用者が接近する表て面側と該表て面側と反対側の裏面側に形成すると共に、上記第２取付部に位置決め用の第２貫孔を、上記表て面側と上記裏面側に形成し、かつ、上記第２取付部の軸心の揺動軌跡を含む鉛直平面上に、上記表て面側と上記裏面側の上記第１貫孔の孔軸心、及び、上記表て面側と上記裏面側の上記第２貫孔の孔軸心を配設し、さらに、上記表て面側の上記第１貫孔と上記裏面側の上記第１貫孔との上記第１取付部の長手方向位置を相違させると共に、上記表て面側の上記第２貫孔と上記裏面側の上記第２貫孔との上記第２取付部の長手方向位置を相違させ、上記第１取付部に外嵌した上記第１フレームの端部及び上記第２取付部に外嵌した上記第２フレームの端部を外方から押圧して塑性加工して、上記第１貫孔に突入する第１突隆部及び上記第２貫孔に突入する第２突隆部を形成し、位置決めして固着した構造である。 The connecting structure for a seat chair according to the present invention includes the first and second mounting portions of the angle adjusting bracket for a seat chair having pipe-shaped first and second mounting portions whose angles can be adjusted mutually, and the seat seat portion. In the connecting structure for seat chairs that connects the pipe-like ends of the first and second frames for the back and the back, the first mounting hole is provided with a first through hole for positioning. in conjunction with the user be printed on the back surface side opposite to the front Te side and said surface Te side approaching, the second through-hole for positioning the second mounting portion, the surface side and the back surface Te Table On the vertical plane including the swing locus of the axis of the second mounting portion, and the axis of the first through hole on the surface side and the back side, and the table The hole axis of the second through hole on the front surface side and the back surface side is disposed, and the first through hole on the front surface side and the first through hole on the back surface side are further arranged. Mounting part Together is different from the longitudinal position, is different from the longitudinal position of the second attachment portion of the aforementioned side Te Table second through-hole and the back surface side of the second through-hole, to the first attachment portion A first protrusion that presses the end portion of the first frame that is externally fitted and the end portion of the second frame that is externally fitted to the second mounting portion to perform plastic processing and enters the first through hole. A ridge and a second ridge that enters the second through-hole are formed, positioned, and fixed.

本発明によれば、フレームを外嵌して塑性加工する際に、第１・第２取付部の軸心廻りに角度調整金具が少し左右に傾いたとしても、座イス用角度調整金具を正規の姿勢に矯正して連結できる。塑性加工の際に、座イス用角度調整金具側の部位の内、第１・２取付部以外の箇所が変形せず、悪影響を防止して所望の角度調整機能を維持できる。座イス用角度調整金具を適切な箇所に位置決めできると共に抜け止めや廻り止めを確実に行え、強固かつ高精度に連結できる。小さな押圧力で塑性加工でき、塑性加工用のポンチや金型等の工具や設備の寿命を延ばすことができる。背部の揺動基端が、コゼを生ずることなくスムーズに傾動可能である。 According to the present invention, when the frame is externally fitted and plastically processed, even if the angle adjusting bracket is slightly tilted to the left and right around the shaft center of the first and second mounting portions, the angle adjusting bracket for the chair is properly It can be corrected and connected to the posture. During the plastic working, the portions other than the first and second mounting portions of the portion on the side of the angle adjustment fitting for the seat chair are not deformed, and the desired angle adjustment function can be maintained while preventing adverse effects. The angle adjustment bracket for seat chairs can be positioned at an appropriate location, and can be securely prevented from coming off or turning, and can be connected firmly and with high precision. Plastic processing can be performed with a small pressing force, and the life of tools and equipment such as punches and dies for plastic processing can be extended. The rocking base end of the back portion can be smoothly tilted without causing a bulge.

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. 座イス用角度調整金具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 the angle adjustment metal fitting for seat chairs. 座イス用角度調整金具の実施の一形態の分解斜視図である。It is a disassembled perspective view of one Embodiment of the angle adjustment metal fitting for seat chairs. 本発明の実施の一形態の要部断面側面図である。It is a principal part cross-sectional side view of one Embodiment of this invention. 図４のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 第２アームを形成するための板体の一例を示す平面図である。It is a top view which shows an example of the board for forming a 2nd arm. 浮動くさび部材とギア部とくさび形窓部を説明する説明図である。It is explanatory drawing explaining a floating wedge member, a gear part, and a wedge-shaped window part. 説明用要部斜視図である。It is a principal part perspective view for description. 最大展開状態にある座イス用角度調整金具の要部破断側面図である。It is a principal part fracture side view of the angle adjustment metal fitting for seat chairs in the maximum deployment state. 任意の傾斜角度とされた座イス用角度調整金具の要部破断側面図である。It is a principal part fracture side view of the angle adjustment metal fittings for seat chairs made into the arbitrary inclination angles. 最大折り畳み状態にある座イス用角度調整金具の要部破断側面図である。It is a principal part fracture side view of the angle adjustment metal fitting for seat chairs in the maximum folding state. 角度保持解除状態とさせる座イス用角度調整金具の要部破断側面図である。It is a principal part fracture side view of the angle adjustment metal fitting for seat chairs made into an angle maintenance release state. 展開方向へ第２アームを戻す状態にある座イス用角度調整金具の要部破断側面図である。It is a principal part fracture side view of the angle adjustment metal fitting for seat chairs in the state which returns the 2nd arm to the deployment direction. 最大展開状態から角度設定を行う動作を説明する要部拡大側面図である。It is a principal part expanded side view explaining the operation | movement which performs an angle setting from the maximum expansion | deployment state. 最大折り畳み状態から展開方向へ第２アームを戻す動作を説明する要部拡大側面図である。It is a principal part expanded side view explaining the operation | movement which returns a 2nd arm to the expansion | deployment direction from a maximum folding state.

以下、図示の実施形態に基づき本発明を詳説する。
本発明に係る座イス用角度調整金具は、Ｕ字乃至コの字状に曲げ加工された座イス座部用のパイプ状の第１フレーム80と、Ｕ字乃至コの字状に曲げ加工された座イス背部用のパイプ状の第２フレーム90と、の間に介設され、第１フレーム80（座イスの座部）に対して第２フレーム90（座イス背部）の傾斜角度を調整自在な関節金具である。 Hereinafter, the present invention will be described in detail based on illustrated embodiments.
The angle adjusting bracket for seat chair according to the present invention is bent into a U-shaped or U-shaped pipe-shaped first frame 80 for a seat chair seat and bent into a U-shaped or U-shaped shape. And the pipe-shaped second frame 90 for the back of the seat chair, and the inclination angle of the second frame 90 (seat chair back) is adjusted with respect to the first frame 80 (seat seat seat). It is a free joint bracket.

図１乃至図４に於て、座イス用角度調整金具（以下、角度調整金具と呼ぶ場合もある）Ａの実施の一形態は、第１フレーム80のパイプ状（円筒状）の端部81が同心状に外嵌されるパイプ状（円筒状）の第１取付部18を有する第１アーム１と、第２フレーム90のパイプ状（円筒状）の端部91が同心状に外嵌され第１取付部18に対して水平軸心Ｃ１廻りに揺動するパイプ状（円筒状）の第２取付部19を有する第２アーム２と、を備えている。
また、第１アーム１と第２アーム２とが水平軸心（以下第１軸心と呼ぶ場合もある）Ｃ１廻りに相互に揺動可能に枢結（枢着）され、第１取付部18の軸心Ｌ１に対して第２取付部19の軸心Ｌ２の間の角度（揺動角度）θが調整自在な角度調整機能を有している。 In FIG. 1 to FIG. 4, one embodiment of an angle adjusting bracket for seat chair (hereinafter also referred to as an angle adjusting bracket) A is a pipe-shaped (cylindrical) end portion 81 of a first frame 80. The first arm 1 having a pipe-shaped (cylindrical) first mounting portion 18 that is fitted concentrically and the pipe-shaped (cylindrical) end portion 91 of the second frame 90 are fitted concentrically. And a second arm 2 having a pipe-shaped (cylindrical) second mounting portion 19 that swings around the horizontal axis C1 with respect to the first mounting portion 18.
Further, the first arm 1 and the second arm 2 are pivoted so as to be swingable with respect to each other around a horizontal axis C1 (hereinafter also referred to as a first axis). The angle adjustment function is such that the angle (swinging angle) θ between the axis L2 of the second mounting portion 19 and the axis L1 can be adjusted.

第１アーム１の第１取付部18に、円筒状壁部18ａを貫通する複数の位置決め用の第１貫孔69を形成している。
第１貫孔69は、第１フレーム80の端部81において、その端部81のラジアル外方から内方に向かって押圧する塑性加工（プレス加工やカシメ加工等）によって、端部81のラジアル内方に突出状に形成される第１（小）突隆部89が突入（嵌入）するための孔である。 A plurality of first through holes 69 for positioning penetrating the cylindrical wall portion 18a are formed in the first mounting portion 18 of the first arm 1.
The first through-hole 69 is formed at the end 81 of the first frame 80 by a plastic working (press work, caulking work, etc.) that presses the end 81 radially outward from the radial outside. This is a hole into which the first (small) protruding portion 89 formed inwardly protrudes (inserts).

また、第２アーム２の第２取付部19に、円筒状壁部19ａを貫通する複数の位置決め用第２貫孔79を形成している。
第２貫孔79は、第２フレーム90の端部91において、その端部91のラジアル外方から内方に向かって押圧する塑性加工によって、端部91のラジアル内方に突出状に形成される第２（小）突隆部99が突入するための孔である。 Further, a plurality of second positioning through holes 79 penetrating the cylindrical wall portion 19a are formed in the second mounting portion 19 of the second arm 2.
The second through hole 79 is formed in a projecting shape at the end 91 of the second frame 90 so as to protrude radially inward of the end 91 by plastic working that presses the end 91 inward from the radially outer side. This is a hole for the second (small) protruding portion 99 to enter.

図１に示すように、第２取付部19が水平軸心Ｃ１廻りに揺動した際に、その第２取付部19の軸心Ｌ２の軌跡を揺動軌跡Ｋと呼び、揺動軌跡Ｋを含んだ鉛直状の平面を鉛直平面Ｓと呼ぶと、図４及び図５に示すように、第１貫孔69の孔軸心Ｌ６及び第２貫孔79の孔軸心Ｌ７は、鉛直平面Ｓ上に、配設されている。
例えば、図５に示すように、第２取付部19の軸心Ｌ２方向からみて、鉛直平面Ｓと第２貫孔79の孔軸心Ｌ７とが同一直線上に配設されている。なお、図示省略するが、第１取付部18の軸心Ｌ１方向からみて、鉛直平面Ｓと第１貫孔69の孔軸心Ｌ６とは同一直線上に配設されている。 As shown in FIG. 1, when the second mounting portion 19 swings around the horizontal axis C1, the locus of the axis L2 of the second mounting portion 19 is referred to as a swing locus K. When the included vertical plane is called the vertical plane S, as shown in FIGS. 4 and 5, the hole axis L6 of the first through hole 69 and the hole axis L7 of the second through hole 79 are the vertical plane S. Arranged above.
For example, as shown in FIG. 5, the vertical plane S and the hole axis L <b> 7 of the second through hole 79 are arranged on the same straight line when viewed from the direction of the axis L <b> 2 of the second mounting portion 19. Although not shown, the vertical plane S and the hole axis L6 of the first through hole 69 are arranged on the same straight line when viewed from the direction of the axis L1 of the first mounting portion 18.

また、図４に於て、座イスの使用者（着席者）が着座（着席）状態で、使用者の背部や臀部が接近する側を表て面側Ｊと呼び、反対側を裏面側Ｑと呼ぶと、第１・第２取付部18，19の表て面側Ｊと裏面側Ｑの両側から第１・第２貫孔69，79を貫設している。言い換えると第１・第２貫孔69，79を、軸心Ｌ１，Ｌ２をラジアル方向から挟むような位置に配設している。
また、表て面側Ｊの第１・第２貫孔69（69ｊ），79（79ｊ）の孔軸心Ｌ６，Ｌ７と、裏面側Ｑの第１・第２貫孔69（69ｑ），79（79ｑ）の孔軸心Ｌ６，Ｌ７と、は、第１・第２取付部18，19の長手方向（軸心Ｌ１，Ｌ２方向）位置を、相違させている。 In FIG. 4, when the user of the seat chair (sitting person) is seated (sitting), the side where the user's back and buttocks approach is called the surface side J, and the opposite side is the back side Q. If it says, the 1st, 2nd through-holes 69 and 79 will be penetrated from the both sides of the front surface side J and the back surface side Q of the 1st, 2nd attachment part 18,19. In other words, the first and second through holes 69 and 79 are arranged at positions that sandwich the shaft centers L1 and L2 from the radial direction.
Also, the hole axis centers L6 and L7 of the first and second through holes 69 (69j) and 79 (79j) on the surface side J, and the first and second through holes 69 (69q) and 79 on the back surface side Q are shown. the hole axis L6, L 7 of (79Q), is a longitudinal direction (axis L1, L2 direction) position of the first and second mounting portions 18 and 19, and are differentiated.

また、第１アーム１及び第２アーム２は、左右対称に形成された１枚の板体を折曲げ塑性加工したものである。板体状態の際（折曲げ塑性加工前）に、第１・第２貫孔69，79となる貫孔部及び切欠部を形成している。 The first arm 1 and the second arm 2 are formed by bending and plasticizing a single plate body formed symmetrically. In the plate state (before bending plastic working), through-hole portions and notch portions to be the first and second through-holes 69 and 79 are formed.

例えば、第２アーム２の第２取付部19を、一枚の板をＣ字状に折曲げて、その板の側縁部を突き合わせて円筒状に形成する場合は、図６に示すように、第２アーム２（図２参照）を形成するための板体40における平板部42の中心線Ｌ42上に、裏面側Ｑの第２貫孔79ｑに対応する貫孔部78を形成する。平板部42の左右の側縁部41，41に、表て面側Ｊの第２貫孔79ｊに対応する左右一対の半円状切欠部77，77を形成する。
なお、ギア部４を形成するための左右一対のギア板部45，45や、第１軸心Ｃ１を中心とする軸孔を形成するための左右一対の貫通孔22と、同じ工程にて（打ち抜き加工工程、又は、レーザ加工工程、又は、ワイヤー加工工程等）により形成するのが望ましい。 For example, when the second mounting portion 19 of the second arm 2 is formed in a cylindrical shape by bending a single plate into a C shape and abutting the side edges of the plate, as shown in FIG. A through-hole portion 78 corresponding to the second through-hole 79q on the back surface side Q is formed on the center line L42 of the flat plate portion 42 in the plate body 40 for forming the second arm 2 (see FIG. 2). A pair of left and right semicircular cutout portions 77 and 77 corresponding to the second through holes 79j on the surface side J are formed on the left and right side edge portions 41 and 41 of the flat plate portion 42, respectively.
In the same process, a pair of left and right gear plate portions 45, 45 for forming the gear portion 4 and a pair of left and right through holes 22 for forming a shaft hole centered on the first axis C1 ( It is desirable to form by a punching process, a laser processing process, a wire processing process or the like.

また、図示省略するが、第１アーム１の第１取付部18を、一枚の板をＣ字状に折曲げて、その板の側縁部を突き合わせて円筒状に形成する場合も第２アーム２と同様に、第１アーム１を形成するための板体において第１取付部18に対応する平板部に、裏面側Ｑの第１貫孔69ｑに対応する貫孔部を形成する。平板部の左右の側縁部に表て面側Ｊの第１貫孔69ｊに対応する左右一対の半円状切欠部を形成する。 Although not shown in the drawings, the first mounting portion 18 of the first arm 1 is also formed in a cylindrical shape by bending a single plate into a C shape and butting the side edges of the plate. Similarly to the arm 2, a through-hole portion corresponding to the first through-hole 69 q on the back surface side Q is formed in the flat plate portion corresponding to the first mounting portion 18 in the plate body for forming the first arm 1. A pair of left and right semicircular cutout portions corresponding to the first through holes 69j on the surface side J appearing on the left and right side edge portions of the flat plate portion are formed.

また、図２と図３に於て、第１アーム１に、一対の対面する壁部17，17を有するケース部３を設け、ケース部３から第１取付部18を延伸させて設けている（延設している）。
また、第２アーム２に、相互に平行な２枚のギア板部45，45から成りケース部３の内部に収容状態とされるギア部４を設け、ギア部４から第２取付部19を延設している。
第１アーム１のケース部３が有する壁部17，17夫々の中央部に、貫通孔21，21が設けられている。
第１アーム１と第２アーム２は、軸部材20により枢結される。即ち、第２アーム２のギア部４を、第１アーム１の壁部17，17に挟んだ状態として、軸部材20を、第１アーム１の貫通孔21，21・第２アーム２の貫通孔22，22に挿通させてかしめ加工することで、第２アーム２が、第１アーム１に対し水平軸心（第１軸心）Ｃ１廻りに揺動可能となる。 2 and 3, the first arm 1 is provided with a case portion 3 having a pair of facing wall portions 17 and 17, and the first attachment portion 18 is extended from the case portion 3. (Extended).
Further, the second arm 2 is provided with a gear portion 4 which is composed of two gear plate portions 45 and 45 which are parallel to each other and is accommodated inside the case portion 3, and the second mounting portion 19 is provided from the gear portion 4 to the second arm 2. It is extended.
Through holes 21 and 21 are provided in the central portions of the wall portions 17 and 17 of the case portion 3 of the first arm 1.
The first arm 1 and the second arm 2 are pivotally connected by a shaft member 20. That is, with the gear portion 4 of the second arm 2 sandwiched between the wall portions 17 and 17 of the first arm 1, the shaft member 20 is passed through the through holes 21 and 21 of the first arm 1 and the second arm 2. The second arm 2 can be swung around the horizontal axis (first axis) C1 with respect to the first arm 1 by being inserted into the holes 22 and caulking.

図３と図７及び図８に示すように、第１アーム１のケース部３に形成されるくさび形窓部５を備えている。くさび形窓部５は、ケース部３の壁部17，17に夫々同一形状で形成されており、ケース部３を貫通状としている。
くさび形窓部５は、第１軸心Ｃ１側に向かって凹となるよう弧状に形成された貫通孔であり、第１軸心Ｃ１を中心側とした場合のこの貫通孔の外方側の面にはギア部４より外方側位置となる円弧状のくさび面８が形成され、内方側位置の面には第１軸心Ｃ１を中心としギア部４よりも小径の円弧面23が形成されている。従って、ギア部４の歯は、くさび形窓部５から見える状態となる。 As shown in FIGS. 3, 7 and 8, a wedge-shaped window portion 5 formed in the case portion 3 of the first arm 1 is provided. The wedge-shaped window portion 5 is formed in the same shape on the wall portions 17 and 17 of the case portion 3, respectively, and the case portion 3 has a penetrating shape.
The wedge-shaped window portion 5 is a through hole formed in an arc shape so as to be concave toward the first axis C1 side, and the outer side of the through hole when the first axis C1 is the center side. The surface is formed with an arcuate wedge surface 8 that is located outwardly from the gear portion 4, and an arcuate surface 23 that is smaller in diameter than the gear portion 4 about the first axis C <b> 1 is formed on the surface at the inward side position. Is formed. Therefore, the teeth of the gear portion 4 are visible from the wedge-shaped window portion 5.

図７に示すように、ギア部４は、水平軸心Ｃ１を中心とした円弧線に沿って形成されている。
くさび面８は、第１軸心（水平軸心）Ｃ１と偏心する第２軸心（水平状偏心軸心）Ｃ２を中心とした円弧形状に形成されており、（図７に示すように）第１アーム１を左手側とし第２アーム２を右手側とした場合に、くさび形窓部５は時計廻り方向に縮小する───くさび面８がギア部４に接近していく───くさび形の孔となる。
つまり、外方側のくさび面８とギア部４の外周歯面との間において空間部が形成され、その空間部に後述する浮動くさび部材６が配設される。 As shown in FIG. 7, the gear part 4 is formed along the circular arc line centering on the horizontal axis C1.
The wedge surface 8 is formed in an arc shape centering on a first axis (horizontal axis) C1 and a second axis (horizontal eccentric axis) C2 that is eccentric (as shown in FIG. 7). When the first arm 1 is on the left hand side and the second arm 2 is on the right hand side, the wedge-shaped window 5 shrinks in the clockwise direction ---- the wedge surface 8 approaches the gear part 4 ---- It becomes a wedge-shaped hole.
That is, a space portion is formed between the outer wedge surface 8 and the outer peripheral tooth surface of the gear portion 4, and a floating wedge member 6 described later is disposed in the space portion.

即ち、角度調整金具Ａは浮動くさび部材６を備えており、この部材６は、くさび形窓部５内にて移動可能に配設され、かつ、一面側（内方側の面）がギア部４に噛合可能な歯面７とされ、他面側（外方側の面）がくさび形窓部５の外方側のくさび面８に当接する当接面９とされている。
当接面９は、くさび形窓部５のくさび面８の曲率半径と（略）同一とされている。歯面７はギア部４のピッチ円の曲率半径と同一となる面に複数の歯が形成されており、これら歯が同時に全てギア部４と噛み合うようされている。 That is, the angle adjusting bracket A is provided with a floating wedge member 6, which is movably disposed in the wedge-shaped window portion 5, and one surface side (inner side surface) is a gear portion. 4, the other surface side (outer surface) is a contact surface 9 that contacts the outer wedge surface 8 of the wedge-shaped window portion 5.
The contact surface 9 is (substantially) the same as the radius of curvature of the wedge surface 8 of the wedge-shaped window portion 5. The tooth surface 7 has a plurality of teeth formed on the same surface as the radius of curvature of the pitch circle of the gear portion 4, and these teeth all mesh with the gear portion 4 at the same time.

くさび形窓部５は、第２アーム２にて下方に押し返された浮動くさび部材６を収容して歯面７とギア部４との噛合状態を解除させる退避空間部11を、有する。
第２アーム２は、浮動くさび部材６を折り畳み方向に押圧する押し返し突部10を、ギア部４の一端側（上部側）に有し、かつ、くさび形窓部５の退避空間部11に収容された浮動くさび部材６を押し出す押し出し突部12を、ギア部４の他端側（下部側）に、有する。
また、浮動くさび部材６の幅寸法はケース部３の幅寸法と略同一とされている。つまり、浮動くさび部材６の当接面９の両側縁部の面がくさび形窓部５（壁部17，17）のくさび面８に当接可能となる。 The wedge-shaped window portion 5 has a retracting space portion 11 that accommodates the floating wedge member 6 pushed back by the second arm 2 and releases the meshing state between the tooth surface 7 and the gear portion 4.
The second arm 2 has a push-back protrusion 10 that presses the floating wedge member 6 in the folding direction on one end side (upper side) of the gear portion 4 and is accommodated in the retracting space portion 11 of the wedge-shaped window portion 5. On the other end side (lower side) of the gear portion 4, there is an extrusion protrusion 12 that pushes out the floating wedge member 6.
Further, the width dimension of the floating wedge member 6 is substantially the same as the width dimension of the case portion 3. That is, the surfaces of both side edges of the abutting surface 9 of the floating wedge member 6 can abut on the wedge surface 8 of the wedge-shaped window portion 5 (wall portions 17, 17).

第１アーム１のケース部３内に、浮動くさび部材６を第２アーム２のギア部４へ押し付ける方向に弾発付勢する弾発部材13を、有している。弾発部材13は、鋼線材をＵ字状に折り返して形成したバネ部材であり、両端部が壁部17，17間のケース部３に固定され中央部が浮動くさび部材６の当接面９の中央領域に当接する。そして、浮動くさび部材６をギア部４へ弾発付勢している。なお、弾発部材13及び軸部材20は、図４と図７及び図９〜図15に於ては、図示省略している。 In the case portion 3 of the first arm 1, there is provided a resilient member 13 that resiliently biases the floating wedge member 6 in a direction of pressing the floating wedge member 6 against the gear portion 4 of the second arm 2. The elastic member 13 is a spring member formed by folding a steel wire material into a U shape. Abuts on the central region of The floating wedge member 6 is elastically biased toward the gear portion 4. Note that the elastic member 13 and the shaft member 20 are not shown in FIGS. 4, 7 and 9 to 15.

また、図２と図３に示すように、浮動くさび部材６がくさび形窓部５から脱落するのを防止する脱落防止カバー33を、具備している。脱落防止カバー33は、ケース部３を左右外側から包囲するように配設されるものであり、正面視に於て、上方開口状横倒略コの字状の薄板体である。
また、図２及び図３と図９〜図11に示すように、ギア部４と浮動くさび部材６とを上方から包囲すると共に第１軸心Ｃ１廻りに揺動自在に枢着される異物侵入防止部材26を、具備している。 Further, as shown in FIGS. 2 and 3, a falling prevention cover 33 is provided to prevent the floating wedge member 6 from falling off the wedge-shaped window portion 5. The drop-off prevention cover 33 is disposed so as to surround the case portion 3 from the left and right outer sides, and is a thin plate body having an approximately U-shape with an open top side and an inverted shape when viewed from the front.
Further, as shown in FIGS. 2 and 3 and FIGS. 9 to 11, the intrusion of foreign matter that surrounds the gear portion 4 and the floating wedge member 6 from above and is pivotally mounted around the first axis C1 is possible. A prevention member 26 is provided.

そして、本発明に係る座イス用連結構造は、図１と図４及び図５に示すように、上述の角度調整金具Ａと、座イス用の第１フレーム80及び第２フレーム90と、を備えている。
予め、第１・第２取付部18，19に複数の第１・第２貫孔69，79を形成しておいて、次に、第１取付部18に第１フレーム80の端部81を外嵌させ、第２取付部19に第２フレーム90を外嵌させている。そして、外嵌した端部81，91を外方からポンチ等にて押圧して塑性加工して、第１フレーム80の端部81に複数の第１突隆部89を形成し、夫々を第１貫孔69に突入（嵌入）させ、第２フレーム90の端部91に複数の第２突隆部99を形成して、夫々を第２貫孔79に突入させて、位置決めしている。第１・第２貫孔69，79と、第１・第２突隆部89，99との嵌合にて軸心Ｌ１，Ｌ２廻りの廻り止め及び長手方向への抜け止めをして固着した連結構造である。 And, as shown in FIGS. 1, 4 and 5, the connecting structure for seat chairs according to the present invention comprises the above-mentioned angle adjusting bracket A, and the first frame 80 and the second frame 90 for seat chairs. I have.
A plurality of first and second through holes 69 and 79 are formed in the first and second mounting portions 18 and 19 in advance, and then the end portion 81 of the first frame 80 is formed in the first mounting portion 18. The second frame 90 is externally fitted to the second mounting portion 19. Then, the externally fitted end portions 81 and 91 are pressed from the outside with a punch or the like to be plastically processed to form a plurality of first protruding portions 89 at the end portion 81 of the first frame 80, and each of the first protruding portions 89 is a first one. A plurality of second protrusions 99 are formed at the end portion 91 of the second frame 90 and are inserted into the second through holes 79 for positioning. The first and second through holes 69 and 79 and the first and second projecting portions 89 and 99 are fitted to each other to prevent rotation around the shaft centers L1 and L2 and to prevent them from coming off in the longitudinal direction. It is a connected structure.

第１・第２突隆部89，99は、鉛直平面Ｓ上で表て面側Ｊと裏面側Ｑの第１・第２貫孔69，79に夫々対応するように、表て面側Ｊの第１・第２突隆部89ｊ，99ｊと裏面側Ｑの第１・第２突隆部89ｑ，99ｑを形成している。言い換えると、第１・第２突隆部89，99を、軸心Ｌ１，Ｌ２をラジアル方向から挟むような位置に形成している。 The first and second projecting portions 89 and 99 appear on the vertical plane S so as to correspond to the first and second through holes 69 and 79 on the surface side J and the back side Q, respectively. first and second突隆portion 89j of, forming a first and second 突隆portion 89 q, 99 q of 99j and the back side Q. In other words, the first and second protruding portions 89 and 99 are formed at positions that sandwich the axial centers L1 and L2 from the radial direction.

次に、本発明の座イス用角度調整金具及び座イス用連結構造の作用について説明する。
第１・第２フレーム80，90を固定し、第１・第２フレーム80，90の端部81，91を、第１・第２取付部18，19に外嵌しただけの仮組（仮連結）状態において、第１・第２取付部18，19の軸心Ｌ１，Ｌ２廻りに角度調整金具Ａが僅かに回転する場合があるが、塑性加工する際に、第１・第２突隆部89，99が第１・第２貫孔69，79内へ突入しようとすることで、第１・第２貫孔69，79が第１・第２突隆部89，99に沿って移動し、角度調整金具Ａが軸心Ｌ１，Ｌ２廻りに回転して適切な姿勢や位置に矯正され位置決めされる。つまり、角度調整金具Ａが左右方向に傾倒した姿勢で第１・第２フレーム80，90に固着されるような倒れが防止され、背部の第２フレーム２がコゼることなくスムーズに傾動でき、ギアの飛びや欠けといった不具合の発生も防止する。 Next, the operation of the angle adjusting bracket for seat chair and the connecting structure for seat chair according to the present invention will be described.
The first and second frames 80 and 90 are fixed, and the end portions 81 and 91 of the first and second frames 80 and 90 are temporarily fitted to the first and second mounting portions 18 and 19 (temporary assembly). In the connected state, the angle adjusting bracket A may rotate slightly around the shaft centers L1 and L2 of the first and second mounting portions 18 and 19, but the first and second protrusions may be used during plastic working. The first and second through holes 69 and 79 move along the first and second protruding portions 89 and 99 by the portions 89 and 99 trying to enter the first and second through holes 69 and 79. Then, the angle adjusting bracket A rotates around the shaft centers L1 and L2 to be corrected and positioned in an appropriate posture and position. That is, the angle adjusting bracket A is prevented from falling down so as to be fixed to the first and second frames 80 and 90 in a posture inclined in the left-right direction, and the second frame 2 at the back can be smoothly tilted without being squeezed. It also prevents problems such as gear skipping and chipping.

第１・第２突隆部89，99を形成する際に、第１・第２取付部18，19に窪部を形成するような塑性加工を行なわないため、角度調整金具Ａの第１・２取付部18，19に大きな押圧力が付与されるのを軽減し、取付部18，19以外の箇所への悪影響（例えば、ケース部３、ギア部４、くさび形窓部５、貫通孔21、孔部31等が変形するような不具合）を防止できる。 When forming the first and second projecting portions 89 and 99, the first and second mounting portions 18 and 19 are not subjected to plastic working such as forming recesses in the first and second mounting portions 18 and 19, so 2 Reduces the application of a large pressing force to the mounting portions 18 and 19, and adversely affects parts other than the mounting portions 18 and 19 (for example, the case portion 3, the gear portion 4, the wedge-shaped window portion 5, the through hole 21. , Such a problem that the hole 31 and the like are deformed can be prevented.

特に、角度調整金具Ａは、人体の荷重を支持する（受ける）ため、強度をアップする必要があり、例えば、第１・第２アーム１，２の第１・第２取付部18，19を、窒化処理鋼（浸炭焼き入れ鋼、又は、浸炭窒化処理鋼）としている。このような強度の強い第１・第２取付部18，19は、多大な押圧力で塑性変形させなければならず、従来は、塑性加工が非常に困難であったが、本発明では、第１・第２貫孔69，79を形成することで、第１・第２取付部18，19を窪ませる（凹部を形成する）塑性加工を行う必要がなくなり、小型の設備で容易に塑性加工による連結を可能にする。 In particular, the angle adjusting bracket A needs to increase the strength in order to support (receive) the load of the human body. For example, the first and second mounting portions 18 and 19 of the first and second arms 1 and 2 are attached. Nitrided steel (carburized and quenched steel or carbonitrided steel). The strong first and second mounting portions 18 and 19 must be plastically deformed with a large pressing force. Conventionally, plastic working has been very difficult. By forming the first and second through-holes 69 and 79, it is not necessary to perform plastic working to form the first and second mounting portions 18 and 19 (to form concave portions), and plastic processing can be easily performed with small equipment. Allows connection by.

また、第１・第２フレーム80，90は、フレームとして曲げ加工等が容易な軟鋼や鉄等の金属であるため、端部81，91は塑性変形が容易であり、少ない押圧力で、第１・第２突隆部89，99を十分にラジアル内方へ突出させることができ、確実に抜け止めや廻り止め効果が得られる。 In addition, since the first and second frames 80 and 90 are made of a metal such as mild steel or iron that can be easily bent as frames, the end portions 81 and 91 are easily plastically deformed, and the first and second frames 80 and 90 can be operated with a small pressing force. The 1st and 2nd ridges 89 and 99 can be projected sufficiently inward in the radial direction, and it is possible to reliably prevent them from coming off or turning.

次に、折り畳み・展開揺動動作する第１アーム１と第２アーム２の角度調整機能について説明する。
第１アーム１と第２アーム２とは、図９に示すように、相互が離れた最大展開状態───第１アーム１と第２アーム２とが直線状（１８０°の位相）となる状態───から徐々に第２アーム２が水平軸心Ｃ１廻りに揺動し、図10に示すように第１アーム１との間で任意の角度（折り畳み角度）θで折り畳み状（傾斜状）となり、図11に示すように、相互が略直角となる所定の最大折り畳み状態となる。 Next, the angle adjustment function of the first arm 1 and the second arm 2 that perform folding / unfolding swinging will be described.
As shown in FIG. 9, the first arm 1 and the second arm 2 are in a maximum deployed state where they are separated from each other. The first arm 1 and the second arm 2 are linear (180 ° phase). The second arm 2 gradually swings around the horizontal axis C1 from the state ───, and is folded (inclined) at an arbitrary angle (folding angle) θ with the first arm 1 as shown in FIG. Thus, as shown in FIG. 11, a predetermined maximum folded state is obtained in which the two are substantially perpendicular to each other.

図14と図15と共に説明すると、図14（ａ）は図９の状態に対応し、浮動くさび部材６はギア部４に噛み合うと共にくさび面８に当接し、第２アーム２は図９において時計廻りにこれ以上揺動しない（ロックがかかる）。
この状態から図10に示すように第２アーム２を起立させる方向へ揺動させると、図14（ｂ）に示すように、弾発部材13（図８参照）にてギア部４へ弾発付勢され噛合する浮動くさび部材６の当接面９は、窓部５のくさび面８から離れて、くさび面８との間にわずかな隙間ｄが生じる。そして、第２アーム２の起立動作により図14（ｃ）に示すように、浮動くさび部材６の誘導勾配面（段付き面）27がくさび形窓部５の当り用段付部28と当接状となって、隙間ｄにより浮動くさび部材６の歯面７がギア部４から離れることができ、浮動くさび部材６の歯面７がギア部４をカチカチと音をたて乗り越えることができる。 14A and 15B, FIG. 14A corresponds to the state of FIG. 9, and the floating wedge member 6 engages with the gear portion 4 and abuts against the wedge surface 8, and the second arm 2 in FIG. No more rocking around (locked).
When the second arm 2 is swung in this state as shown in FIG. 10 from this state, the elastic member 13 (see FIG. 8) is used to project the gear part 4 as shown in FIG. 14 (b). The contact surface 9 of the floating wedge member 6 that is urged and meshed is separated from the wedge surface 8 of the window portion 5, and a slight gap d is formed between the contact surface 9 and the wedge surface 8. Then, as shown in FIG. 14 (c), the guide gradient surface (stepped surface) 27 of the floating wedge member 6 abuts against the contact stepped portion 28 of the wedge-shaped window portion 5 by the standing operation of the second arm 2. Thus, the tooth surface 7 of the floating wedge member 6 can be separated from the gear portion 4 by the gap d, and the tooth surface 7 of the floating wedge member 6 can get over the gear portion 4 with a click.

この浮動くさび部材６の誘導勾配面27は、浮動くさび部材６の歯面７の後縁部に形成され、くさび形窓部５の段付部28は、くさび形窓部５の内方側の円弧面23に上記勾配面27と当接可能となるよう形成されている。 The guide slope surface 27 of the floating wedge member 6 is formed at the rear edge of the tooth surface 7 of the floating wedge member 6, and the stepped portion 28 of the wedge-shaped window portion 5 is located on the inner side of the wedge-shaped window portion 5. The arc surface 23 is formed so as to be in contact with the gradient surface 27.

したがって、浮動くさび部材６は、歯面７がギア部４に噛合し、かつ、当接面９がくさび面８に当接し、ギア部４とくさび面８との間に挟まれる浮動くさび部材６のくさび作用により、第２アーム２が第１アーム１に対して展開方向へ揺動するのを抑制している。
つまり、任意の折り畳み角度（傾斜角度）θに第１アーム１と第２アーム２とを維持させることができる。 Therefore, the floating wedge member 6 has the tooth surface 7 meshed with the gear portion 4, the abutment surface 9 abutted on the wedge surface 8, and the floating wedge member 6 sandwiched between the gear portion 4 and the wedge surface 8. The wedge action prevents the second arm 2 from swinging in the deployment direction with respect to the first arm 1.
That is, the first arm 1 and the second arm 2 can be maintained at an arbitrary folding angle (tilt angle) θ.

そして、図11と図15（ｄ）に示すように、第２アーム２は、第１アーム１に対して所定折り畳み角度を越えて最大折り畳み状態まで揺動すると、押し返し突部10が浮動くさび部材６を折り畳み方向に押圧する。
つまり、ギア部４（歯形成部）の一端部側に押し返し突部10が形成されており、この状態で、押し返し突部10が浮動くさび部材６の歯面７の前縁部に当接する。
図12と図15（ｅ）に示すように、第２アーム２を最大折り畳み状態からさらに折り畳み方向へ揺動させると、押し返し突部10にて押し返された浮動くさび部材６（誘導勾配面27）が、上記段付部28を乗り越え、くさび形窓部５が有する退避空間部11に収容され、浮動くさび部材６の歯面７とギア部４との噛合状態を解除させる。つまり、退避空間部11に収容された浮動くさび部材６はギア部４から離れた状態にある。 Then, as shown in FIGS. 11 and 15 (d), when the second arm 2 swings with respect to the first arm 1 beyond the predetermined folding angle to the maximum folded state, the push-back protrusion 10 is a floating wedge member. 6 is pressed in the folding direction.
That is, the push-back protrusion 10 is formed on one end side of the gear portion 4 (tooth forming portion). In this state, the push-back protrusion 10 contacts the front edge of the tooth surface 7 of the floating wedge member 6.
As shown in FIGS. 12 and 15 (e), when the second arm 2 is further swung in the folding direction from the maximum folded state, the floating wedge member 6 (guide gradient surface 27) pushed back by the push-back projection 10 is obtained. ) Passes over the stepped portion 28 and is accommodated in the retracting space portion 11 of the wedge-shaped window portion 5 to release the meshing state between the tooth surface 7 of the floating wedge member 6 and the gear portion 4. That is, the floating wedge member 6 accommodated in the retreat space portion 11 is in a state of being separated from the gear portion 4.

従って、第２アーム２は、第１アーム１に対してフリー（揺動自在）となり図13のように、展開方向へ揺動自在となり、図９の最大展開状態へと戻すことができる。
そして、第２アーム２は、第１アーム１に対して所定角度（１８０°）の最大展開状態まで展開揺動させると、図15（ｆ）に示すように、退避空間部11に収容された浮動くさび部材６を押し出して歯面７とギア部４とを噛合状態とさせる押し出し突部12を有する。 Therefore, the second arm 2 becomes free (swingable) with respect to the first arm 1 and swings in the deployment direction as shown in FIG. 13, and can be returned to the maximum deployed state in FIG.
Then, when the second arm 2 is deployed and swung to the maximum deployed state of a predetermined angle (180 °) with respect to the first arm 1, as shown in FIG. 15 (f), the second arm 2 is accommodated in the retreat space 11. It has an extrusion protrusion 12 that pushes out the floating wedge member 6 to bring the tooth surface 7 and the gear portion 4 into meshing state.

押し出し突部12は、ギア部４の（押し返し突部10が形成された一端部側と反対側の）他端部側に形成されており、最大展開状態を得ると、突部12が浮動くさび部材６の誘導勾配面27を押圧して、浮動くさび部材６を退避空間部11から押出し、図14（ａ）の状態へと戻すことができる。 The push-out protrusion 12 is formed on the other end side of the gear part 4 (on the opposite side to the one end side where the push-back protrusion 10 is formed), and when the fully expanded state is obtained, the protrusion 12 is a floating wedge. By pressing the guide gradient surface 27 of the member 6, the floating wedge member 6 can be pushed out from the retreat space 11 and returned to the state shown in FIG.

つまり、くさび形窓部５内における浮動くさび部材６の動作は、最大展開状態から最大折り畳み状態までは、浮動くさび部材６は、ギア部４とくさび面８とに挟まれてくさび作用により、くさび面８側の第１アーム１とギア部４側の第２アーム２とを任意の折り畳み角度（傾斜角度）θに調整可能でその角度θを維持させることができ、最大折り畳み状態を越えると、浮動くさび部材６は押し返し突部10により押圧されてくさび形窓部５の退避空間部11内に収容され、第１アーム１と第２アーム２とは揺動自由状態となる。
そして、最大展開状態に戻されると、浮動くさび部材６は押し出し突部12により押圧されて退避空間部11から押し出され、ギア部４と再び噛合状態となる。 That is, the operation of the floating wedge member 6 in the wedge-shaped window portion 5 is performed by the wedge action between the gear portion 4 and the wedge surface 8 by the wedge action from the maximum expanded state to the maximum folded state. The first arm 1 on the surface 8 side and the second arm 2 on the gear unit 4 side can be adjusted to an arbitrary folding angle (inclination angle) θ and the angle θ can be maintained. When the maximum folding state is exceeded, The floating wedge member 6 is pressed by the push-back protrusion 10 and is accommodated in the retreat space 11 of the wedge-shaped window portion 5, so that the first arm 1 and the second arm 2 are in a freely swinging state.
Then, when returned to the maximum deployed state, the floating wedge member 6 is pressed by the pushing projection 12 and pushed out of the retracting space portion 11, and is brought into meshing state with the gear portion 4 again.

なお、本発明は、設計変更可能であって、角度調整金具Ａの角度調整機能（機構）は、上述した実施形態のものに限らず、例えば、ギア部噛合可能な爪部材を水平状の軸心廻りに揺動可能に枢設し、所望の角度で爪部材をギア部に噛合させて角度を調整自在とするものでも良い。
また、第１・第２貫孔69，79の数は実施の形態に限らず自由である。また、板体を折曲げ加工して第１・第２取付部18，19を形成後に、第１・第２貫孔69，79を形成しても良い。 The present invention can be changed in design, and the angle adjusting function (mechanism) of the angle adjusting bracket A is not limited to that of the above-described embodiment. For example, a claw member that can mesh with a gear portion is connected to a horizontal shaft. It may be pivotally pivoted around the center, and the claw member meshes with the gear portion at a desired angle so that the angle can be adjusted.
The number of the first and second through-hole 69, 79 is free not only in the form of implementation. Also, after forming the first and second mounting portions 18 and 19 by bending the plate member, it may be formed first and second through-hole 69, 79.

以上のように、本発明の座イス用角度調整金具は、座イス座部用の第１フレーム80のパイプ状の端部81が外嵌されるパイプ状の第１取付部18と、座イス背部用の第２フレーム90のパイプ状の端部91が外嵌され第１取付部18に対して水平軸心Ｃ１廻りに揺動するパイプ状の第２取付部19と、を有し、第１取付部18と第２取付部19の間の角度θが調整自在な座イス用角度調整金具に於て、上記第１取付部18は、第１フレーム80の端部81に塑性加工によって形成される第１突隆部89が突入するための位置決め用の第１貫孔69を有し、第２取付部19は、第２フレーム90の端部91に塑性加工によって形成される第２突隆部99が突入するための位置決め用の第２貫孔79を有するので、仮組の際に、第１・第２取付部18，19の軸心Ｌ１，Ｌ２廻りに角度調整金具Ａが回転しても、塑性加工の際に、座イス用角度調整金具Ａを適切な姿勢や位置に矯正して連結できる。塑性加工の際に、座イス用角度調整金具側の部位の内、第１・２取付部18，19以外の箇所が変形せず、悪影響を防止して所望の角度調整機能を維持できる。座イス用角度調整金具を適切な箇所に位置決めできると共に抜け止めや廻り止めを確実に行え、強固かつ高精度に連結できる。小さな押圧力で塑性加工でき、塑性加工用のポンチや金型等の工具や設備の寿命を延ばすことができる。 As described above, the angle adjusting bracket for a seat chair according to the present invention includes the pipe-shaped first attachment portion 18 on which the pipe-shaped end portion 81 of the first frame 80 for the seat chair seat is fitted, and the seat chair. A pipe-like second mounting portion 19 that is fitted around the pipe-shaped end portion 91 of the second frame 90 for the back portion and swings around the horizontal axis C1 with respect to the first mounting portion 18. In the angle adjustment bracket for the seat chair, in which the angle θ between the first mounting portion 18 and the second mounting portion 19 is adjustable, the first mounting portion 18 is formed on the end portion 81 of the first frame 80 by plastic working. The first projecting portion 89 has a first through hole 69 for positioning, and the second mounting portion 19 is formed at the end portion 91 of the second frame 90 by plastic working. Since there is a second through hole 79 for positioning into which the raised portion 99 enters, the angle adjusting bracket A rotates around the shaft centers L1 and L2 of the first and second mounting portions 18 and 19 during temporary assembly. Shi Also, when the plastic working may be connected to correct the angle-adjustable hinge A for seat chair the correct posture and position. During the plastic working, portions other than the first and second attachment portions 18 and 19 in the portion on the side of the angle adjustment fitting for the seat chair are not deformed, and a desired angle adjustment function can be maintained while preventing adverse effects. The angle adjustment bracket for seat chairs can be positioned at an appropriate location, and can be securely prevented from coming off or turning, and can be connected firmly and with high precision. Plastic processing can be performed with a small pressing force, and the life of tools and equipment such as punches and dies for plastic processing can be extended.

また、第２取付部19の軸心Ｌ２の揺動軌跡Ｋを含む鉛直平面Ｓ上に、第１貫孔69の孔軸心Ｌ６、及び、第２貫孔79の孔軸心Ｌ７が、配設されるので、塑性加工の際に、第１・第２フレーム80，90が邪魔にならず、金型や加工機に干渉せず容易に塑性加工できる。塑性加工する際に、角度調整金具Ａや第１・第２フレーム80，90が最も安定する姿勢で保持でき、段取り作業を迅速かつ容易に行うことができると共に、加工精度の向上に貢献できる。 Further, the hole axis L6 of the first through hole 69 and the hole axis L7 of the second through hole 79 are arranged on the vertical plane S including the swing locus K of the axis L2 of the second mounting portion 19. Therefore, the first and second frames 80 and 90 do not get in the way during plastic processing, and can be easily plastic processed without interfering with a mold or a processing machine. When plastic working, the angle adjusting bracket A and the first and second frames 80 and 90 can be held in the most stable posture, so that the setup work can be performed quickly and easily, and the machining accuracy can be improved.

また、本発明の座イス用連結構造は、角度θが相互に調整自在なパイプ状の第１・第２取付部18，19を有する座イス用角度調整金具Ａの第１・第２取付部18，19と、座イス座部用・背部用の第１・第２フレーム80，90のパイプ状の端部81，91と、を連結する座イス用連結構造に於て、第１取付部18に位置決め用の第１貫孔69を形成すると共に第２取付部19に位置決め用の第２貫孔79を形成し、かつ、第１取付部18に外嵌した第１フレーム80の端部81及び第２取付部19に外嵌した第２フレーム90の端部91を外方から押圧して塑性加工して、第１貫孔69に突入する第１突隆部89及び第２貫孔19に突入する第２突隆部99を形成し、位置決めして固着したので、仮組の際に、第１・第２取付部18，19の軸心Ｌ１，Ｌ２廻りに角度調整金具Ａが回転しても、塑性加工の際に、座イス用角度調整金具Ａを適切な姿勢や位置に矯正して連結できる。塑性加工の際に、座イス用角度調整金具側の部位の内、第１・２取付部以外の箇所が変形せず、悪影響を防止できる。特に、左右平行な鉛直平面Ｓ，Ｓ内で第２取付部19，19の軸心Ｌ２が揺動し、コゼを生ずることなくスムーズな背部の傾動作動が行なわれる。 In addition, the connecting structure for a seat chair according to the present invention includes the first and second mounting portions of the angle adjusting bracket A for the seat chair having the pipe-shaped first and second mounting portions 18 and 19 in which the angle θ can be adjusted mutually. In the seat-chair connection structure for connecting 18, 19 and the pipe-like ends 81, 91 of the first and second frames 80, 90 for the seat-seat and back portions, the first mounting portion A first through hole 69 for positioning is formed in 18, a second through hole 79 for positioning is formed in the second mounting portion 19, and the end portion of the first frame 80 is externally fitted to the first mounting portion 18. The first projecting portion 89 and the second through-hole that are inserted into the first through-hole 69 by pressing the end portion 91 of the second frame 90 fitted to the 81 and the second mounting portion 19 from the outside and performing plastic processing. Since the second protrusion 99 that enters 19 is formed and positioned and fixed, the angle adjusting bracket A is mounted around the shaft centers L1 and L2 of the first and second mounting portions 18 and 19 during temporary assembly. Even during rotation, during plastic working It may be connected to correct the angle-adjustable hinge A for seat chair the correct posture and position. During the plastic working, portions other than the first and second mounting portions of the portion on the side of the angle adjustment fitting for the seat chair are not deformed, and adverse effects can be prevented. In particular, the axis L2 of the second mounting portions 19 and 19 is swung in the left and right parallel vertical planes S and S, and a smooth back tilting movement is performed without causing a sag.

18 第１取付部
19 第２取付部
69 第１貫孔
69ｊ表て面側の第１貫孔
69ｑ裏面側の第１貫孔
79 第２貫孔
79ｊ表て面側の第２貫孔
79ｑ裏面側の第２貫孔
80 第１フレーム
81 端部
89 第１突隆部
90 第２フレーム
91 端部
99 第２突隆部
Ｃ１水平軸心
Ｊ表て面側
Ｋ揺動軌跡
Ｌ１軸心
Ｌ２軸心
Ｌ６孔軸心
Ｌ７孔軸心
Ｑ裏面側
Ｓ鉛直平面
θ 角度 18 First mounting part
19 Second mounting part
69 1st through hole
69j first through hole on the surface side
The first through hole on the back side of 69q
79 2nd through hole
79j 2nd through hole on the surface side
79q 2nd through hole on back side
80 1st frame
81 edge
89 First bump
90 2nd frame
91 Edge
99 Second ridge C1 Horizontal axis
J front side K swing locus L1 shaft center L2 shaft center L6 hole shaft center L7 hole shaft center
Q back side S vertical plane θ angle

Claims

A pipe-shaped first attachment portion (18) on which a pipe-shaped end portion (81) of the first frame (80) for the seat-chair seat portion is fitted; and a second frame (90) for the seat-chair back portion. A pipe-like second attachment portion (19) having a pipe-like end portion (91) fitted thereon and swinging about the horizontal axis (C1) with respect to the first attachment portion (18), In the angle adjusting bracket for a seat chair, the angle (θ) between the first mounting portion (18) and the second mounting portion (19) is adjustable.
The first attachment portion (18) is a first through hole for positioning for the first protrusion (89) formed by plastic working to enter the end portion (81) of the first frame (80). (69) on the front surface side (J) where the user approaches in the state of using the chair, and on the back surface side (Q) opposite to the front surface side (J) ,
The second mounting portion (19) is a second through-hole for positioning for the second protrusion (99) formed by plastic working to enter the end portion (91) of the second frame (90). (79) on the front side (J) and the back side (Q),
On the vertical plane (S) including the swing locus (K) of the axis (L2) of the second mounting portion (19), the first side on the surface side (J) and the back surface side (Q). Hole axis (L6) (L6) of through hole (69j) (69q), and hole of said 2nd through hole (79j) (79q) of said surface side (J) and said back surface side (Q) Axis center (L7) (L7) is arranged,
Furthermore, the longitudinal direction position of the first mounting portion (18) between the first through hole (69j) on the surface side (J) and the first through hole (69q) on the back surface side (Q) is defined. Make a difference
The longitudinal position of the second attachment portion (19) between the second through hole (79j) on the surface side (J) and the second through hole (79q) on the back surface side (Q) is different. seat chair angle adjustment bracket, characterized in that the

The first and second mounting portions (18) (18) of the angle adjusting bracket (A) for the seat chair having the pipe-shaped first and second mounting portions (18) and (19) whose angles (θ) can be adjusted mutually. 19) and the connecting structure for the seat chair that connects the first and second frames (80) and (90) of the first and second frames (81) and (91) for the seat seat back and back. ,
Positioning the first through hole (69) for positioning in the first mounting portion (18), the surface side (J) where the user approaches in the state where the seat chair is used, and the side opposite to the surface side (J) And a second through hole (79) for positioning is formed in the second mounting portion (19) on the surface side (J) and the back surface side (Q). And on the vertical plane (S) including the swing locus (K) of the axis (L2) of the second mounting portion (19), the surface side (J) and the back surface side (Q) The hole axis (L6) (L6) of the first through hole (69j) (69q), and the second through hole (79j) (79q) on the surface side (J) and the back surface side (Q). ) Hole axial centers (L7) and (L7), and the first through hole (69j) on the surface side (J) and the first through hole (69q on the back surface side (Q). ) And the longitudinal position of the first mounting portion (18) The longitudinal position of the second mounting portion (19) between the second through hole (79j) on the surface side (J) and the second through hole (79q) on the back surface side (Q) Make a difference
An end (81) of the first frame (80) externally fitted to the first attachment portion (18) and an end (91 of the second frame (90) externally fitted to the second attachment portion (19) ) Is pressed from the outside and plastically processed, and the first ridge (89) that enters the first through hole (69) and the second ridge that enters the second through hole (19) ( 99), a seat-chair connection structure characterized by being formed and positioned and fixed.