JP4361784B2 - Height adjustment device such as armrest of chair - Google Patents
Height adjustment device such as armrest of chair Download PDFInfo
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- JP4361784B2 JP4361784B2 JP2003432327A JP2003432327A JP4361784B2 JP 4361784 B2 JP4361784 B2 JP 4361784B2 JP 2003432327 A JP2003432327 A JP 2003432327A JP 2003432327 A JP2003432327 A JP 2003432327A JP 4361784 B2 JP4361784 B2 JP 4361784B2
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
- A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
- A47C1/0303—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in vertical direction
- A47C1/0305—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in vertical direction by peg-and-notch or pawl-and-ratchet mechanism
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- Seats For Vehicles (AREA)
Description
本発明は、椅子の肘掛け等の高さ調節装置に関する。 The present invention relates to a height adjusting device such as an armrest of a chair.
本出願人は、椅子の肘掛け(肘当て)の高さを、着座者の体格による腕の位置の違いや作業内容等により調節しうるようにした肘掛けの高さ調節装置を種々提案している(例えば特許文献1、2参照)。
上記特許文献に記載されている従来の肘掛けの高さ調節装置においては、いずれも、操作杆(操作レバー)に連係された係合ピン(軸)を、常時上下複数段の係止部(係止溝)と係合する方向に付勢する付勢手段に、ばねが用いられているため、組付工数や部品点数が大となっている。
また、肘当て支持杆や肘掛け支柱のカバーに、ばねの収容部や保持部を形成する必要があるため、肘当て支持杆やカバーの設計の自由度が制約される。
In each of the conventional armrest height adjusting devices described in the above-mentioned patent documents, the engaging pin (shaft) linked to the operating rod (operating lever) is always connected to a plurality of upper and lower engaging portions (engaging portions). Since the spring is used for the urging means for urging in the direction engaging with the retaining groove), the number of assembling steps and the number of parts are large.
Further, since it is necessary to form a spring accommodating portion and a holding portion on the cover of the elbow support support rod and the armrest support column, the degree of freedom in designing the elbow support support rod and the cover is limited.
本発明は、上記問題点に鑑みてなされたもので、別部材としてのばねを設けることなく、係合ピンを常時係止溝方向に付勢しうるようにし、組付工数や部品点数を削減するとともに、肘当て支持杆等の設計の自由度を増大しうるようにした
、椅子における肘掛け等の高さ調節装置を提供することを目的としている。
The present invention has been made in view of the above-described problems, and allows the engagement pin to be constantly biased in the direction of the locking groove without providing a spring as a separate member, thereby reducing the number of assembly steps and the number of parts. In addition, an object of the present invention is to provide a height adjusting device such as an armrest in a chair, which can increase the degree of freedom in designing an elbow rest support rod or the like.
本発明によると、上記課題は、次のようにして解決される。
(1)左右両側面に前方に開口する上下複数段の係止溝と、それらの前方において、各係止溝と連通する上下方向を向くガイド孔とを有する中空状の肘掛け支柱の上端部内に、上端に肘当てを取付けた中空状の肘当て支持杆を、上下に摺動可能に嵌合し、該肘当て支持杆の下部に、左右両端部が前記係止溝と選択的に係合する係合ピンを、前後方向に移動可能に挿通するとともに、前記肘当て支持杆内に、上端部が後方に押動操作可能な操作部材に、かつ下端部が前記係合ピンにそれぞれ連係された上下方向を向く操作杆を、中間部を中心として前後に回動可能に収容し、かつ前記操作杆の下端に連設された斜め前上方を向く弾性片の上端を、前記肘当て支持杆の前部内面に当接させることにより、前記操作杆の下端部を、前記係合ピンが常時係止溝と係合する方向に付勢する。
According to the present invention, the above problem is solved as follows.
(1) In the upper end portion of a hollow armrest strut having a plurality of upper and lower engaging grooves opening forward on both left and right side surfaces, and a guide hole facing in the vertical direction communicating with each engaging groove in front of them. A hollow elbow pad support rod with an elbow pad attached to the upper end is slidably fitted up and down, and the left and right ends are selectively engaged with the locking grooves at the lower part of the elbow pad support rod. The engaging pin is movably inserted in the front-rear direction, the upper end portion is linked to the operation member that can be pushed backward, and the lower end portion is linked to the engaging pin in the elbow pad support rod. The operating rod facing upward and downward is accommodated so as to be able to rotate back and forth around the middle portion, and the upper end of the elastic piece facing diagonally forward and upward connected to the lower end of the operating rod is attached to the elbow rest support rod. The lower end of the operating rod is kept in contact with the inner surface of the front part of the operating pin. Biases the locking groove engages.
(2)上記(1)項において、弾性片を後方に若干弾性変形させて、操作杆を肘当て支持杆内に収容することにより、操作杆の下端の後面を肘当て支持杆の後部内面に圧接させる。 (2) In the above item (1), the elastic piece is slightly elastically deformed backward, and the operating rod is accommodated in the elbow rest support rod so that the rear surface of the lower end of the operation rod is attached to the inner surface of the rear portion of the elbow rest support rod. Press contact.
(3)上記(1)または(2)項において、操作杆の中間部の後面に、肘当て支持杆の後部内面に当接する凸部を設け、この凸部を中心として操作杆が前後に回動するようにする。 (3) In the above item (1) or (2), the rear surface of the intermediate portion of the operating rod is provided with a convex portion that comes into contact with the inner surface of the rear portion of the elbow pad support rod, and the operating rod rotates back and forth around this convex portion. To move.
(4)上記(3)項において、凸部の外形形状を、円弧状の曲面とする。 (4) In the above item (3), the outer shape of the convex portion is an arcuate curved surface.
(5)上記(1)〜(4)項のいずれかにおいて、操作杆及び弾性片を、合成樹脂により一体成形する。 (5) In any one of the above items (1) to (4), the operating rod and the elastic piece are integrally formed of a synthetic resin.
請求項1記載の発明によれば、係合ピンを常時係止溝方向に付勢する弾性片が、操作杆の下端に一体的に連設されているので、別部材としてのばね等を設ける必要はなく、組付工数や部品点数を削減しうるとともに、ばねの収容部や保持部を形成する必要がないので、肘当て支持杆等の設計の自由度も増大する。 According to the first aspect of the present invention, since the elastic piece that constantly urges the engaging pin in the direction of the locking groove is integrally connected to the lower end of the operating rod, a spring or the like as a separate member is provided. This is not necessary, and the number of assembling steps and the number of parts can be reduced, and since it is not necessary to form a spring accommodating portion or a holding portion, the degree of freedom in designing an elbow rest support rod or the like increases.
請求項2記載の発明によれば、操作杆を肘当て支持杆内に収容した際に、操作杆が落下するのが防止されるため、係合ピンを操作杆の軸孔や肘当て支持杆の長孔等に挿通する組立作業が容易となる。 According to the second aspect of the present invention, when the operating rod is housed in the elbow rest support rod, the operating rod is prevented from falling, and therefore, the engagement pin is connected to the shaft hole of the operating rod or the elbow rest supporting rod. The assembling work to be inserted through the long hole is made easy.
請求項3記載の発明によれば、操作杆をピン等を用いて回動可能に組付ける必要がなくなるので、その組付工数や部品点数を削減することができる。
According to the invention described in
請求項4記載の発明によれば、凸部と肘当て支持杆との接触部の回動抵抗が小さくなるので、操作杆を円滑に回動させることができる。 According to the fourth aspect of the present invention, since the rotation resistance of the contact portion between the convex portion and the elbow rest support rod becomes small, the operation rod can be smoothly rotated.
請求項5記載の発明によれば、弾性片を操作杆に容易に一体成形しうるとともに、弾性片と肘当て支持杆との摺動抵抗も小さくなる。 According to the fifth aspect of the present invention, the elastic piece can be easily formed integrally with the operating rod, and the sliding resistance between the elastic piece and the elbow rest support rod is also reduced.
以下、本発明の最良と思われる実施形態を、図面に基づいて説明する。
図1は、本発明を適用した椅子の肘掛けの要部を縦断して示す側面図、図2は、同じく、肘当てを上昇させたときの要部の縦断側面図、図3は、要部の分解斜視図である。
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments that are considered to be the best of the present invention will be described with reference to the drawings.
FIG. 1 is a side view illustrating a main part of an armrest of a chair to which the present invention is applied, and FIG. 2 is a vertical side view of the main part when the elbow rest is raised, and FIG. 3 is a main part. FIG.
肘掛け(1)は、上部を若干前傾(以下、図1の左方を前として説明する)させて起立するように、図示しない椅子の座部等に下端が固着された肘掛け支柱(2)と、これに、後記する本発明の高さ調節装置を介して上下動可能に嵌合された肘当て支持杆(3)と、この上端に、前後方向の中央部下面がぼ水平をなして取付けられた肘当て(4)と、支柱カバー(5)とを備えている。 The armrest (1) has an armrest strut (2) whose lower end is fixed to a seat or the like of a chair (not shown) so that it stands up with its upper part tilted slightly forward (hereinafter, described with the left side of FIG. 1 as the front). And an elbow rest support rod (3) fitted to be movable up and down through the height adjusting device of the present invention described later, and the lower surface of the central portion in the front-rear direction at the upper end. An attached elbow rest (4) and a strut cover (5) are provided.
図4及び図5にも示すように、肘掛け支柱(2)は、上下両端が開口された楕円形断面の金属パイプにより形成され、下端の開口部は、キャップ(6)により閉塞されている。 As shown in FIGS. 4 and 5, the armrest strut (2) is formed of an elliptical cross-section metal pipe opened at both upper and lower ends, and the opening at the lower end is closed by a cap (6).
肘掛け支柱(2)は、その下端部の内側面に固着されたブラケット(7)(図3参照)により、椅子の支基等に固着されるようになっている。 The armrest strut (2) is fixed to a chair base or the like by a bracket (7) (see FIG. 3) fixed to the inner surface of the lower end portion thereof.
上記肘当て支持杆(3)は、下端が開口された角筒状断面の金属パイプよりなり、その上端には、肘当て(4)を取付けるための円板状の基板(8)が固着されている。 The elbow rest support rod (3) is made of a metal pipe having a rectangular tube cross-section with an open lower end, and a disk-shaped substrate (8) for attaching the elbow rest (4) is fixed to the upper end. ing.
支柱カバー(5)は、合成樹脂により、肘掛け支柱(2)に若干の隙間を設けて嵌合可能な楕円形断面に形成され、その上端部には、上記基板(8)が嵌合しうる大きさの拡径部(5a)が形成され、かつその上端部の内周面には、基板(8)の外周部下面に当接しうる係止段部(9)が形成されている。 The strut cover (5) is formed of a synthetic resin in an elliptical cross section that can be fitted to the armrest strut (2) with a slight gap, and the substrate (8) can be fitted to the upper end portion thereof. An enlarged diameter portion (5a) having a size is formed, and an engaging step portion (9) capable of contacting the lower surface of the outer peripheral portion of the substrate (8) is formed on the inner peripheral surface of the upper end portion.
係止段部(9)には、支柱カバー(5)の上端を基板(8)にねじ止めするための左右1対のめねじ孔(10)が形成されている。 The locking step portion (9) is formed with a pair of left and right female screw holes (10) for screwing the upper end of the column cover (5) to the substrate (8).
支柱カバー(5)の上端部前面には、カバー内に連通するほぼ方形の保持孔(11)を有する枠状片(12)が、前向きに突設されている。
A frame-shaped piece (12) having a substantially rectangular holding hole (11) communicating with the inside of the
次に、本発明の肘掛けの高さ調節装置について説明する。
高さ調節装置は、肘掛け支柱(2)内に上方より嵌合されるとともに、対向面の中央部に肘当て支持杆(3)を上下に摺動可能に保持する方形のガイド孔(13)を有する左右2分割構造の合成樹脂製のガイドスリーブ(14)と、肘当て支持杆(3)内に下方より収容される操作杆(15)と、上記支柱カバー(5)の枠状片(12)の保持孔(11)に摺動可能に嵌合される操作ノブ(16)とを備えている。
Next, the armrest height adjusting device of the present invention will be described.
The height adjusting device is fitted into the armrest strut (2) from above and has a rectangular guide hole (13) that holds the elbow rest support rod (3) slidably up and down at the center of the opposing surface. A guide sleeve (14) made of synthetic resin having a left and right split structure, an operating rod (15) accommodated in the elbow rest support rod (3) from below, and a frame-like piece (5) of the column cover (5) And an operation knob (16) slidably fitted in the holding hole (11) of 12).
ガイドスリーブ(14)は、図4及び図5に示すように、平面視ほぼ楕円形断面をなすとともに、前後方向を向く分割線(L)を、ガイドスリーブ(14)を左右に2等分する中心線に対し、左右方向にずらしてあり、ガイドスリーブ(14)を中心として点対称をなす位置で2分割しうるようになっている。 As shown in FIGS. 4 and 5, the guide sleeve (14) has a substantially elliptical cross section in plan view, and divides the dividing line (L) facing in the front-rear direction into two equal parts. The center line is shifted in the left-right direction so that it can be divided into two at a point symmetrical with respect to the guide sleeve (14).
ガイドスリーブ(14)における左右1対の半筒状片(14a)(14a)の対向面に形成された上下方向を向く凹状ガイド(13a)には、上下方向を向くガイド孔(17)と、前方に開口する側面視後向U字状をなす上下複数段の係止溝(18)とが、互いに連通するように形成されている。 The concave guide (13a) facing the up and down direction formed on the opposing surface of the pair of left and right semi-cylindrical pieces (14a) and (14a) in the guide sleeve (14) has a guide hole (17) facing the up and down direction, A plurality of upper and lower engaging grooves (18) having a U-shape in a rear side view that opens forward are formed so as to communicate with each other.
左右の半筒状片(14a)は、それらの前後部の上下の対向面に設けられた突栓(19)と凹孔(20)とを互いに嵌合させて位置決めした状態で、肘掛け支柱(2)内に上方より圧嵌され、かつ上端に形成された外向鍔部(21)を肘掛け支柱(2)の上端に係止することにより、下方に移動するのが阻止されている。 The left and right semi-cylindrical pieces (14a) are armrest struts (19) and recessed holes (20) provided on the upper and lower opposing surfaces of the front and rear portions of the left and right semi-cylindrical pieces (14a) in a state where they are positioned and fitted to each other. 2) The downward movement of the armrest strut (2) is prevented from moving downward by engaging the outward flange (21) formed in the upper end and press-fitted into the upper end of the armrest strut (2).
上記操作杆(15)は、合成樹脂により、肘当て支持杆(3)の上下寸法とほぼ等しい長さの板状に形成され、その左右寸法は、肘当て支持杆(3)における両側板(3a)の対向面間の寸法よりも若干小さく、かつ前後寸法は、肘当て支持杆(3)内において前後に余裕をもって移動しうる寸法とされている。 The operating rod (15) is formed of a synthetic resin into a plate shape having a length substantially equal to the vertical dimension of the elbow pad support rod (3). It is slightly smaller than the dimension between the opposing surfaces in 3a), and the dimension in the front-rear direction is a dimension that can move with sufficient margin in the elbow rest support rod (3).
操作杆(15)の上端の前面には、後方に凹入する側面視円弧状の連係溝(22)が形成され、また上下方向の中央よりもやや上方寄りの前後両面には、肘当て支持杆(3)の前板(3b)と後板(3c)の内面に当接又は近接する円弧状の凸面(23)(23)が、一体的に形成されている。 On the front surface of the upper end of the operation rod (15), there is formed a link groove (22) that is recessed in a rear view, and is supported by elbow pads on both front and rear sides slightly above the center in the vertical direction. Arc-shaped convex surfaces (23) and (23) which are in contact with or close to the inner surfaces of the front plate (3b) and the rear plate (3c) of the flange (3) are integrally formed.
操作杆(15)の下端部には、前面部が若干切除された薄肉部(24)が形成され、その下端には、上端が円柱状に拡幅された斜め前上方に向かって起立する弾性片(25)が、一体的に連設されている。 At the lower end of the operating rod (15), a thin part (24) is formed with the front part slightly cut away, and at the lower end, an elastic piece that stands up obliquely forward upward with the upper end widened in a cylindrical shape. (25) are integrally connected.
弾性片(25)の上端は、操作杆(15)を肘当て支持杆(3)内に収容した際、若干後方に弾性変形して、肘当て支持杆(3)の前板(3b)の内面に当接するようにしてある。 The upper end of the elastic piece (25) is elastically deformed slightly rearward when the operating rod (15) is housed in the elbow rest support rod (3), so that the front plate (3b) of the elbow rest support rod (3) is It is intended to contact the inner surface.
肘当て支持杆(3)内に収容された操作杆(15)は、その下方寄り、すなわち薄肉部(24)の上部に穿設された軸孔(26)に、肘当て支持杆(3)における両側板(3a)の下部に穿設された前後方向を向く長孔(27)を貫通させて係合ピン(28)を挿通することにより、肘当て支持杆(3)内において前後の凸面(23)を中心として前後に回動しうるように支持されている。 The operation rod (15) accommodated in the elbow support rod (3) is placed in the lower side of the operation rod (15), that is, in the shaft hole (26) drilled in the upper portion of the thin wall portion (24). Front and rear convex surfaces in the elbow rest support rod (3) by inserting the engagement pin (28) through the long hole (27) facing in the front-rear direction formed in the lower part of the both side plates (3a) It is supported so that it can be rotated back and forth around (23).
この収容状態において、図1に示すように、操作杆(15)は、その弾性片(25)の上端が肘当て支持杆(3)の前板(3b)の内面に圧接することにより、凸面(23)を中心として側面視反時計方向に付勢され、操作杆(15)の下端の後面が肘当て支持杆(3)の後板(3c)の内面に当接するとともに、係合ピン(28)は、長孔(27)の後端に位置している。 In this accommodated state, as shown in FIG. 1, the operating rod (15) has a convex surface when the upper end of the elastic piece (25) is pressed against the inner surface of the front plate (3b) of the elbow rest supporting rod (3). (23) is biased counterclockwise when viewed from the side, and the rear surface of the lower end of the operating rod (15) abuts the inner surface of the rear plate (3c) of the elbow rest supporting rod (3) and the engagement pin ( 28) is located at the rear end of the long hole (27).
また、操作杆(15)の凸面(23)より上方部分は、下方部分とは反対に前方に付勢され、肘当て支持杆(3)の前板(3b)の内面と近接している。
係合ピン(28)における長孔(27)より突出する左右両端部は、上記ガイドスリーブ(14)の左右の半筒状片(14a)に形成された係止溝(18)のいずれかと係合するようになっている。
Further, the upper part of the operating rod (15) above the convex surface (23) is biased forward, opposite to the lower portion, and is close to the inner surface of the front plate (3b) of the elbow rest supporting rod (3).
The left and right ends projecting from the long hole (27) of the engagement pin (28) are engaged with either of the locking grooves (18) formed in the left and right semi-cylindrical pieces (14a) of the guide sleeve (14). It comes to match.
上記操作ノブ(16)は、合成樹脂により形成され、その後端面の左右両側部には、先端に外向きの係合爪(29a)を有する弾性係合片(29)が一体的に形成されている。左右の係合爪(29a)は、操作ノブ(16)を弾性係合片(29)を内向に弾性変形させて保持孔(11)に嵌合させた際、そのカバー内の開口部の左右両側縁に弾性係合して抜け止めされるようになっている。 The operation knob (16) is made of synthetic resin, and elastic engagement pieces (29) having outward engagement claws (29a) at the front end are integrally formed on the left and right sides of the rear end surface. Yes. The left and right engaging claws (29a) are arranged on the left and right sides of the opening in the cover when the operating knob (16) is elastically deformed inward by the elastic engaging piece (29) and fitted into the holding hole (11). The two side edges are elastically engaged to be prevented from coming off.
操作ノブ(16)の後端面の中央部には、肘当て支持杆(3)の前板(3b)の上端に穿設された開口(30)を挿通して、後端の円弧状凸面が上記操作杆(15)の上端の連係溝(22)と当接する押圧片(31)が、一体的に突設されている。 At the center of the rear end surface of the control knob (16), an opening (30) drilled in the upper end of the front plate (3b) of the elbow rest support rod (3) is inserted, and the arcuate convex surface of the rear end is formed. A pressing piece (31) that comes into contact with the linkage groove (22) at the upper end of the operating rod (15) is integrally projected.
次に、肘当て(4)の高さを調節する要領を、図6の(a)〜(c)を参照して説明する。なお、図6においては、肘当て(4)及び支柱カバー(5)を省略するとともに、便宜上、肘当て支持杆(3)を2点鎖線で示してある。 Next, the procedure for adjusting the height of the elbow rest (4) will be described with reference to FIGS. In FIG. 6, the elbow pads (4) and the column cover (5) are omitted, and the elbow pad support rods (3) are indicated by two-dot chain lines for convenience.
図6(a)に示すように、例えば肘当て(4)が下限に位置し、かつ操作ノブ(16)が非操作状態(図1の状態)のときには、上述したように、操作杆(15)は、その弾性片(25)の弾性反発力により、凸面(23)を中心として反時計方向に付勢され、係合ピン(28)は、最下段の係止溝(18)内に進入している。 As shown in FIG. 6A, for example, when the elbow rest (4) is positioned at the lower limit and the operation knob (16) is in a non-operation state (state shown in FIG. 1), as described above, the operation rod (15 ) Is urged counterclockwise about the convex surface (23) by the elastic repulsive force of the elastic piece (25), and the engaging pin (28) enters the lowermost locking groove (18). is doing.
この状態において操作ノブ(16)を押動操作すると、図6(b)に示すように、操作杆(15)の上端の連係溝(22)が押圧片(31)の後端により押圧されることにより、操作杆(15)は、弾性片(25)を後向きに弾性変形させながら、凸面(23)を中心として時計方向に強制回動させられる。 When the operating knob (16) is pushed in this state, as shown in FIG. 6 (b), the linkage groove (22) at the upper end of the operating rod (15) is pressed by the rear end of the pressing piece (31). Thus, the operating rod (15) is forcibly rotated clockwise around the convex surface (23) while elastically deforming the elastic piece (25) backward.
これにより、係合ピン(28)は長孔(27)の前端部まで移動し、最下段の係止溝(18)より離脱してガイド孔(17)内に位置する。
この状態のまま、肘当て(4)を引き上げると、図6(c)に示すように、係合ピン(28)がガイド孔(17)に沿って上方に移動することにより、図示しない支柱カバー、肘当て支持杆(3)及び操作杆(15)は、肘掛け支柱(2)に対して一体的に上昇可能となる。
As a result, the engagement pin (28) moves to the front end portion of the long hole (27), is detached from the lowermost locking groove (18), and is positioned in the guide hole (17).
When the elbow rest (4) is pulled up in this state, as shown in FIG. 6 (c), the engaging pin (28) moves upward along the guide hole (17). The elbow rest support rod (3) and the operation rod (15) can be raised integrally with respect to the armrest strut (2).
所望の位置において、操作ノブ(16)より手を離せば、弾性片(25)の反発力により操作杆(15)が反時計方向に回動させられることにより、係合ピン(28)は長孔(27)内を後方に移動し、最寄りの係止溝(18)内に進入して係止保持される。
これにより、肘当て(4)の高さが任意に調節される(図2参照)。
If the hand is released from the operation knob (16) at the desired position, the operation pin (15) is rotated counterclockwise by the repulsive force of the elastic piece (25), so that the engagement pin (28) is long. It moves backward in the hole (27), enters the nearest locking groove (18), and is locked and held.
Thereby, the height of the elbow rest (4) is arbitrarily adjusted (see FIG. 2).
以上説明したように、上記実施形態の高さ調節装置においては、係合ピン(28)を係止溝(18)に選択的に係脱させる操作杆(15)の上下方向の中間部に、肘当て 支持杆(3)の前板(3b)と後板(3c)との内面に当接する凸面(23)(23)を形成し、操作杆(15)の上端部の前面を操作ノブ(16)により押圧することにより、操作杆(15)が凸面(23)を中心として回動しうるようにしているため、従来のように、操作レバーをピンを用いて回動可能に枢着する必要はなく、操作杆(15)の組付工数や部品点数を削減することができる。 As described above, in the height adjusting device of the above-described embodiment, in the middle part in the vertical direction of the operating rod (15) for selectively engaging / disengaging the engaging pin (28) with the locking groove (18), The convex surface (23) (23) which contacts the inner surface of the front plate (3b) and the rear plate (3c) of the elbow rest support rod (3) is formed, and the operation knob ( 16) Since the operating rod (15) can be rotated around the convex surface (23) by pressing it in accordance with 16), the operating lever is pivotally mounted using a pin as before. There is no need, and the number of assembling steps and the number of parts of the operation rod (15) can be reduced.
また、係合ピン(28)を常時係止溝(18)側に付勢する付勢手段に、操作杆(15)の下端に一体的に形成させれた弾性片(25)を用いているので、ばね等の付勢手段を別途設ける必要もない。 In addition, an elastic piece (25) integrally formed at the lower end of the operating rod (15) is used as the biasing means for constantly biasing the engagement pin (28) toward the locking groove (18). Therefore, it is not necessary to separately provide a biasing means such as a spring.
しかも、操作杆(15)を肘当て支持杆(3)内に収容した際に、弾性片(25)が若干弾性変形し、その反力により、操作杆(15)の下端の後面が、肘当て支持杆(3)の後板(3c)の内面に圧接するようにしているため、操作杆(15)が肘当て支持杆(3)内より落下するのが防止され、長孔(27)と軸孔(26)を整合させた状態で係合ピン(28)を容易に挿通することができる。 Moreover, when the operating rod (15) is accommodated in the elbow pad support rod (3), the elastic piece (25) is slightly elastically deformed, and the reaction force causes the rear surface of the lower end of the operating rod (15) to Since the contact support rod (3) is pressed against the inner surface of the rear plate (3c), the operation rod (15) is prevented from falling from the elbow support support rod (3), and the long hole (27) The engagement pin (28) can be easily inserted with the shaft hole (26) aligned.
操作ノブ(16)の後端に、先端に外向きの係合爪(29a)を有する左右1対の弾性係合片(29)を突設し、支柱カバー(5)の保持孔(11)内に操作ノブ(16)を前方より挿入した際、両係止爪(29a)が、カバー内において保持孔(11)の開口部の両側縁に弾性係合して抜け止めされるとともに、操作ノブ(16)の後面に突設した押圧片(31)の後端が操作杆(15)の上端の連係溝(22)と当接するようになっているため、操作ノブ(16)の取付け作業や操作杆(15)との連係作業が極めて容易となり、かつ支柱カバー(5)も一体成形品とすることができ、部品点数が削減される。 At the rear end of the operation knob (16), a pair of left and right elastic engagement pieces (29) having an outward engagement claw (29a) at the front end are projected, and the holding hole (11) of the column cover (5) When the operation knob (16) is inserted into the front from the front, both the locking claws (29a) are elastically engaged with both side edges of the opening of the holding hole (11) in the cover and are prevented from being detached. Since the rear end of the pressing piece (31) protruding from the rear surface of the knob (16) comes into contact with the linkage groove (22) at the upper end of the operating rod (15), the operation of installing the operating knob (16) And the operation work with the operation rod (15) are extremely easy, and the support cover (5) can be formed as an integral molded product, thereby reducing the number of parts.
本発明は、上記実施形態に限定されるものではない。
上記実施形態では、ガイド孔(17)と上下複数段の係止溝(18)とを、肘掛け支柱(2)内に嵌着されるガイドスリーブ(14)に設けているが、それらを、ガイドスリーブ(14)を省略して、肘掛け支柱(2)の左右両側面に直接設けることもある。
The present invention is not limited to the above embodiment.
In the above embodiment, the guide hole (17) and the upper and lower multi-stage locking grooves (18) are provided in the guide sleeve (14) fitted in the armrest strut (2). The sleeve (14) may be omitted, and the sleeve (14) may be provided directly on the left and right sides of the armrest support (2).
この際には、肘当て(4)を上限まで上昇させた際でも、ガイド孔(17)や係止溝(18)が露出しないように、支柱カバー(5)の上下寸法を大とすることが好ましい。また、この際には、肘当て支持杆(3)の形状を、肘掛け支柱(2)内においてがたなく上下動しうる形状とすればよい。 In this case, the vertical dimension of the column cover (5) should be large so that the guide hole (17) and the locking groove (18) are not exposed even when the elbow rest (4) is raised to the upper limit. Is preferred. At this time, the shape of the elbow rest support rod (3) may be a shape that can move up and down in the armrest column (2).
上記実施形態の操作杆(15)では、前後両面に凸面(23)を形成しているが、弾性片(25)を肘当て支持杆(3)の前板(3b)の内面に常時圧接させる際には、前部の凸面(23)を省略しても、操作杆が肘当て支持杆(3)内においてがた付く恐れはない。 In the operation rod (15) of the above embodiment, convex and concave surfaces (23) are formed on both front and rear surfaces, but the elastic piece (25) is always pressed against the inner surface of the front plate (3b) of the elbow rest support rod (3). In this case, even if the front convex surface (23) is omitted, there is no possibility that the operation rod rattles in the elbow rest support rod (3).
(1)肘掛け
(2)肘掛け支柱
(3)肘当て支持杆
(3a)側板
(3b)前板
(3c)後板
(4)肘当て
(5)支柱カバー
(5a)拡径部
(6)キャップ
(7)ブラケット
(8)基板
(9)係止段部
(10)めねじ孔
(11)保持孔
(12)枠状片
(13)ガイド孔
(13a)凹状ガイド
(14)ガイドスリーブ
(14a)半筒状片
(15)操作杆
(16)操作ノブ(操作部材)
(17)ガイド孔
(18)係止溝
(19)突栓
(20)凹孔
(21)外向鍔部
(22)連係溝
(23)凸面(凸部)
(24)薄肉部
(25)弾性片
(26)軸孔
(27)長孔
(28)係合ピン
(29)弾性係合片
(29a)係合爪
(30)開口
(31)押圧片
(L)分割線
(1) Armrest
(2) Armrest support
(3) Elbow rest support rod
(3a) Side plate
(3b) Front plate
(3c) Rear plate
(4) Elbow rest
(5) Prop cover
(5a) Expanded part
(6) Cap
(7) Bracket
(8) Board
(9) Locking step
(10) Female thread hole
(11) Holding hole
(12) Frame-shaped piece
(13) Guide hole
(13a) Concave guide
(14) Guide sleeve
(14a) Semi-cylindrical piece
(15) Operation 杆
(16) Operation knob (operation member)
(17) Guide hole
(18) Locking groove
(19) Plug
(20) Recessed hole
(21) Outward buttocks
(22) Linkage groove
(23) Convex surface (convex part)
(24) Thin part
(25) Elastic piece
(26) Shaft hole
(27) Long hole
(28) Engagement pin
(29) Elastic engagement piece
(29a) Engaging claw
(30) Opening
(31) Pressing piece
(L) Dividing line
Claims (5)
The height adjusting device such as an armrest of a chair according to any one of claims 1 to 4, wherein the operating rod and the elastic piece are integrally formed of a synthetic resin.
Priority Applications (1)
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JP2003432327A JP4361784B2 (en) | 2003-12-26 | 2003-12-26 | Height adjustment device such as armrest of chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003432327A JP4361784B2 (en) | 2003-12-26 | 2003-12-26 | Height adjustment device such as armrest of chair |
Publications (2)
Publication Number | Publication Date |
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JP2005185619A JP2005185619A (en) | 2005-07-14 |
JP4361784B2 true JP4361784B2 (en) | 2009-11-11 |
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JP2003432327A Expired - Fee Related JP4361784B2 (en) | 2003-12-26 | 2003-12-26 | Height adjustment device such as armrest of chair |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US7828389B2 (en) | 2007-02-09 | 2010-11-09 | Okamura Corporation | Armrest device in a chair |
JP2008194229A (en) * | 2007-02-13 | 2008-08-28 | Okamura Corp | Height adjuster of armrest in chair |
JP5154091B2 (en) * | 2007-02-13 | 2013-02-27 | 株式会社岡村製作所 | Chair armrest equipment |
JP5616406B2 (en) * | 2012-08-23 | 2014-10-29 | 株式会社岡村製作所 | Chair |
JP5563631B2 (en) * | 2012-08-24 | 2014-07-30 | 株式会社岡村製作所 | Chair |
JP5733651B1 (en) * | 2014-05-15 | 2015-06-10 | 及樺實業股▲分▼有限公司 | Armrest lifting mechanism |
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2003
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