JP4486352B2 - Operation device for gas spring in chair - Google Patents
Operation device for gas spring in chair Download PDFInfo
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- JP4486352B2 JP4486352B2 JP2003405959A JP2003405959A JP4486352B2 JP 4486352 B2 JP4486352 B2 JP 4486352B2 JP 2003405959 A JP2003405959 A JP 2003405959A JP 2003405959 A JP2003405959 A JP 2003405959A JP 4486352 B2 JP4486352 B2 JP 4486352B2
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- 238000005452 bending Methods 0.000 description 2
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Description
本発明は、例えば椅子の背凭れの傾動角度を調節したり、座体の高さを調節したりするガススプリングの操作装置に関する。 The present invention relates to a gas spring operating device that adjusts, for example, the tilt angle of the backrest of a chair or adjusts the height of a seat.
椅子の背凭れを後傾させる際に付勢力を付与したり、任意の傾動角度にロックしたりする手段に、ガススプリングを使用したものがある(例えば特許文献1参照)。 As a means for applying an urging force when the chair back is tilted backward or locking the chair at an arbitrary tilt angle, there is one using a gas spring (see, for example, Patent Document 1).
このようなガススプリングを使用する際には、そのシリンダの下端を脚杆の上端後部に枢着するとともに、ピストンロッドの上端を、連結金具等を介して、背フレームに固着したブラケットに、ピン(枢軸)をもって回動可能に連結するのが一般的である。 When using such a gas spring, the lower end of the cylinder is pivotally attached to the rear upper end of the leg rod, and the upper end of the piston rod is pinned to a bracket fixed to the back frame via a connecting bracket or the like. In general, the pivots are connected so as to be pivotable.
また、ガススプリングを自由に伸縮させたり、任意の伸縮位置でロックしたりする制御弁のプッシュロッドを、ピストンロッドの上端より突出させ、このプッシュロッドを、操作装置により押圧するようにしている。
上記のように、ガススプリングのピストンロッドの上端を、背フレームに固着したブラケットにピンにより連結する際には、通常、ピンの先端部の外周面に環状溝を形成し、この環状溝にスナップリングを嵌め込んで、ピンが抜け外れるのを防止している。 As described above, when the upper end of the piston rod of the gas spring is connected to the bracket fixed to the back frame with a pin, an annular groove is usually formed on the outer peripheral surface of the tip of the pin and snapped into this annular groove. A ring is inserted to prevent the pin from coming off.
しかし、この方法では、ピンに環状溝を加工したり、スナップリングを嵌着したりする必要があるため、加工や組立て工数及び部品点数が増加する問題がある。 However, in this method, since it is necessary to process an annular groove on the pin or to fit a snap ring, there is a problem that the number of processing and assembling steps and the number of parts increase.
この問題を解決するためには、上記特許文献に記載されているように、背フレームにおける左右の側杆のブラケットの取付部に、対向端縁に上向片を有する1対の支持板を固着し、両支持板の上向片間においてブラケットを背フレームに取付けるとともに、ガススプリングの上端とブラケットとを、単にストレート状のピンにより連結し、該ピンの側端が支持板の上向片に当接して抜け止めされるようにすることも考えられる。 In order to solve this problem, as described in the above-mentioned patent document, a pair of support plates having upward pieces on the opposite end edges are fixed to the mounting portions of the left and right side brackets in the back frame. The bracket is attached to the back frame between the upper pieces of both support plates, and the upper end of the gas spring and the bracket are simply connected by straight pins, and the side ends of the pins are connected to the upper pieces of the support plates. It is also conceivable to prevent contact by coming into contact.
しかし、このようにすると、背フレームの構造が複雑化するとともに、重厚感もあるので、見栄えが悪くなる。 However, if this is done, the structure of the spine frame becomes complicated and there is also a profound feeling, so that the appearance is deteriorated.
本発明は、上記問題点に鑑みてなされたもので、ガススプリング連結用の枢軸に加工を施して抜け止め部材を取付けたり、背フレーム等の可動部に、枢軸の抜け止め部材を設けたりすることなく、簡単な手段により枢軸の抜け止めを図れるようにした、椅子におけるガススプリングの操作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 is provided with a stopper for attaching a retaining member by processing the pivot for connecting a gas spring, or by providing a retaining member for a pivot on a movable part such as a back frame. It is an object of the present invention to provide a gas spring operating device for a chair that can prevent the pivot from coming off by simple means.
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)ガススプリングにおける制御弁のプッシュロッドが突出する一方の端部を、椅子の可動部に、ガススプリングの軸線と直交する枢軸により連結するとともに、前記ガススプリングの他方の端部を椅子の固定部により支持し、前記プッシュロッドを、操作レバーに連係され、かつ前記枢軸を中心として回動する押圧部材により押動することにより、前記可動部の位置を調節するようにした椅子におけるガススプリングの操作装置において、前記枢軸の一端に拡径頭部を形成するとともに、前記操作レバーを、前記拡径頭部の側方において前記枢軸の延長線と平行をなす軸線を中心として回動しうるように設け、前記操作レバーにおける前記押圧部材との連係部側の側端部に、前記枢軸の拡径頭部の端面と近接する方向にほぼ直角に折曲され、さらに先端部が前記枢軸と平行をなす方向にほぼ直角に折曲されたほぼクランク状の折曲部を形成し、このクランク状折曲部における前記枢軸と平行をなす先端部を、前記押圧部材における枢軸から離間した位置に回動自在に嵌合することにより、操作レバーの回動操作により、前記押圧部材を回動させうるようにし、かつ前記クランク状折曲部における拡径頭部の側方に位置する部分の回動領域を、常に拡径頭部の端面の一部と近接して対向する範囲内に制限することにより、前記枢軸を抜け止めする。
According to the present invention, the above problem is solved as follows.
(1) One end portion of the gas spring from which the push rod of the control valve protrudes is connected to the movable portion of the chair by a pivot orthogonal to the axis of the gas spring, and the other end portion of the gas spring is connected to the chair. A gas spring in a chair that is supported by a fixed portion and that adjusts the position of the movable portion by pushing the push rod with a pressing member that is linked to an operation lever and rotates about the pivot. In the operating device, the enlarged head is formed at one end of the pivot, and the operating lever can be rotated around an axis parallel to the extension line of the pivot on the side of the enlarged head. in provided on a side end portion of the linkage portion side of the pressing member in said operating lever, bent approximately at right angles to the direction coming close to the end surface of the enlarged diameter head portion of said pivot as Further tip form a substantially crank-shaped bent portion which is bent substantially at right angles to the direction in which extends parallel with the pivot axis, the distal portion forming a parallel to the pivot axis of the crank-shaped bent portion, the pressing The pressing member can be rotated by a rotation operation of the operation lever by being rotatably fitted at a position away from the pivot of the member, and the enlarged head of the crank-shaped bent portion can be rotated. The pivot is prevented from coming off by always restricting the rotation region of the side portion to a range facing and close to a part of the end face of the enlarged head.
(2)上記(1)項において、操作レバーにおけるクランク状折曲部の基部を、操作レバーの枢軸から離間する方向への移動を阻止するストッパ片を備える保持部材により回動自在に保持する。 (2) In the above item (1), the base of the crank-shaped bent portion of the operation lever is rotatably held by a holding member provided with a stopper piece that prevents the operation lever from moving in a direction away from the pivot.
請求項1記載の発明によれば、ガススプリングの一端部を可動部に連結する枢軸に、拡径頭部を形成し、この拡径頭部の端面に、操作レバーにおけるクランク状の折曲部の一部を常に近接して対向させるだけの簡単な手段で、枢軸を抜け止めしているので、従来のように、枢軸に面倒な加工を施して、スプリング等の抜け止め部材を取付けたり、可動部側に枢軸の抜け止め部材を設けたりする必要はなく、加工や組付け工数及び部品点数が削減されるとともに、可動部の構造も簡素化し、見栄えが向上する。 According to the first aspect of the present invention, the enlarged head is formed on the pivot connecting the one end of the gas spring to the movable portion, and the crank-shaped bent portion of the operation lever is formed on the end surface of the enlarged head. Because the pivot is prevented from coming off by simple means that always make a part of each face close to each other, as in the past, the pivot is subjected to troublesome processing, and a retaining member such as a spring is attached, There is no need to provide a pivot-preventing member on the movable part side, the number of processes, assembly man-hours, and the number of parts are reduced, and the structure of the movable part is simplified and the appearance is improved.
請求項2記載の発明によれば、保持部材のストッパ片により、クランク状折曲部が外側方に移動するのが阻止されるので、枢軸が確実に抜け止めされる。 According to the second aspect of the present invention, since the crank-shaped bent portion is prevented from moving outward by the stopper piece of the holding member, the pivot is reliably prevented from coming off.
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、本発明の一実施形態を備える椅子の側面図で、脚体(1)、座体(2)、背フレーム(3)、及び背凭れ(4)を主要部として構成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that are considered to be the best of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a chair provided with an embodiment of the present invention, and is composed mainly of a leg (1), a seat (2), a back frame (3), and a backrest (4). .
脚体(1)は、キャスタ(5)が取付けられた放射状の5本の脚(6)と、その中心に立設された脚杆(7)とからなり、脚杆(7)の上端には、平面視概ね矩形をなす支基(8)の後端部が、水平回動自在に、かつ脚杆(7)内に収容されたガススプリング(図示略)により、高さ調節可能として取付けられている。 The leg body (1) is composed of five radial legs (6) to which casters (5) are attached and leg rods (7) erected at the center thereof, at the upper end of the leg rod (7). The rear end of the support base (8), which has a generally rectangular shape in plan view, is mounted so that the height can be adjusted by a gas spring (not shown) accommodated in the leg rod (7) so that it can be rotated horizontally. It has been.
座体(2)は、平面視ほぼ方形枠状の座受フレーム(9)と、この上部に取付けられた座シェル(10)と、その上面にインナーシェル(図示略)を介して載設されたクッション材(11)とからなり、座受フレーム(9)の前後の端部の中央部は、それぞれ支基(8)の前端上部と、背フレーム(3)における左右1対のL字状をなす側杆(12)(12)の前端部上面とに、回動可能に取付けられている。 The seat body (2) is mounted on a seat frame (9) having a substantially rectangular frame shape in plan view, a seat shell (10) attached to the upper portion thereof, and an inner shell (not shown) on the upper surface thereof. The center part of the front and rear ends of the seat frame (9) is a pair of left and right L-shapes on the front end of the support base (8) and the back frame (3), respectively. Are attached to the upper surfaces of the front end portions of the side rods (12) and (12).
背凭れ(4)は、背フレーム(3)の起立部に取付けられた背シェル(13)と、その前面に取付けた背当てクッション(14)とからなっている。 The backrest (4) is composed of a back shell (13) attached to an upright portion of the back frame (3) and a back cushion (14) attached to the front surface thereof.
背フレーム(3)の両側杆(12)の前端は、左右方向を向く支軸(15)により連結され、この支軸(15)を支基(8)における脚杆(7)よりもやや前方の上部に枢着することにより、背フレーム(3)及び背凭れ(4)は、支軸(15)を中心として前後に傾動することができる。 The front end of the side frame (12) of the back frame (3) is connected by a support shaft (15) facing in the left-right direction, and this support shaft (15) is slightly forward of the leg rod (7) on the support base (8). The back frame (3) and the backrest (4) can be tilted back and forth about the support shaft (15).
(12a)は、側杆(12)の外側面の折曲部付近を覆うカバー部材である。
図2に示すように、背フレーム(3)における両側杆(12)の折曲部付近と上端部との対向面同士は、連結部材(16)(17)により結合されている。
(12a) is a cover member that covers the vicinity of the bent portion of the outer side surface of the side rod (12).
As shown in FIG. 2, the opposing surfaces of the back frame (3) near the bent portion of the both side collars (12) and the upper end portion are joined by connecting members (16) and (17).
連結部材(16)の裏面と支基(8)の後端との間には、ガススプリング(18)が、次のようにして取付けられている。 A gas spring (18) is attached between the back surface of the connecting member (16) and the rear end of the support base (8) as follows.
図3及び図4にも示すように(図4においては側杆と連結部材は図示略)、連結部材(16)における斜め上下方向を向く傾斜板(16a)の中央部裏面には、正面視ほぼ下向コ字状のブラケット(19)における基片(19a)の前面が、左右の側片(19b)(19b)の後端上部に突設した突片(19c)を、傾斜板(16a)に形成した係合孔(20)(20)に嵌合させて、溶接により固着されている。 As shown in FIGS. 3 and 4 (in FIG. 4, the side bars and the connecting members are not shown), the back surface of the central portion of the inclined plate (16a) facing the oblique vertical direction in the connecting member (16) is viewed from the front. The front surface of the base piece (19a) of the substantially downward U-shaped bracket (19) has a projecting piece (19c) projecting from the upper rear end of the left and right side pieces (19b) (19b), and an inclined plate (16a ) And are fixed by welding.
ブラケット(19)の両側片(19b)間には、ガススプリング(18)のピストンロッド(18a)の上端に取付けられた後向きコ字状の連結金具(21)が、それと、両側片(19b)とに穿設された左右方向を向く通孔(22)(23)に、拡径頭部(24a)を有する枢軸、すなわち枢支ピン(24)を側方より挿通することにより、回動可能に枢着されている。 Between the both side pieces (19b) of the bracket (19), there is a backward U-shaped connecting bracket (21) attached to the upper end of the piston rod (18a) of the gas spring (18), and both side pieces (19b). It is possible to turn by inserting a pivot shaft with an enlarged head (24a), that is, a pivot pin (24) from the side into the left and right through holes (22) and (23). It is pivotally attached to.
なお、枢支ピン(24)は、連結金具(21)の両後向片(21a)間に挟入されるカム部材(30)(詳細は後記する)の枢軸を兼ねている。 The pivot pin (24) also serves as a pivot shaft of a cam member (30) (details will be described later) sandwiched between the two rear pieces (21a) of the connecting fitting (21).
ガススプリング(18)のシリンダ(18b)の下端は、支基(8)の後端に突設した左右1対の支持片(25)に、左右方向を向く枢軸(26)により枢着されている(図1参照)。 The lower end of the cylinder (18b) of the gas spring (18) is pivotally attached to a pair of left and right support pieces (25) projecting from the rear end of the support base (8) by a pivot (26) facing in the left-right direction. (See FIG. 1).
(27)は、ガススプリング(18)の操作装置で、左右方向を向き、かつ左端部に平面視後向きクランク状の折曲部(28a)を有する丸棒状の操作レバー(28)と、その右端に固着された前方を向く把手部(29)と、上記連結金具(21)の両後向片(21a)間において枢支ピン(24)により回動可能に支持されるとともに、操作レバー(28)により回動させられる硬質合成樹脂製のカム部材とを備えている。 (27) is an operating device for the gas spring (18), which is a round bar-shaped operating lever (28) having a crank-shaped bent portion (28a) facing left and right and having a rearward-facing crank shape at the left end, and its right end A pivot part (24) is rotatably supported by a pivot pin (24) between a handle part (29) facing forward and fixed to the two rear pieces (21a) of the connecting bracket (21), and an operation lever (28 ) And a cam member made of a hard synthetic resin that is rotated by the above-described method.
操作レバー(28)は、その折曲部(28a)の近傍が、連結部材(16)の水平片(16b)の右端部上面にねじ(31)止めされた(図3参照)側面視ほぼ下向コ字状の保持金具(32)により回動自在に、かつ折曲部(28a)が連結部材(16)に形成した開口(33)を挿通して、その裏面側に位置するように保持されている。 The operating lever (28) has a bent portion (28a) in the vicinity of the right end of the horizontal piece (16b) of the connecting member (16) with a screw (31) (see FIG. 3). The U-shaped holding bracket (32) can be rotated, and the bent portion (28a) is inserted through the opening (33) formed in the connecting member (16) and is held on the back side. Has been.
操作レバー(28)は、図4に示すように、その折曲部(28a)における基部の右側面が、保持金具(32)に連設された平面視L字状のストッパ片(32a)に近接又は当接することにより、右方へ移動するのが規制されている。 As shown in FIG. 4, the operation lever (28) has an L-shaped stopper piece (32a) in a plan view in which the right side surface of the base of the bent portion (28a) is connected to the holding metal fitting (32). Movement to the right is restricted by approaching or abutting.
カム部材(30)は、図5の拡大縦断側面図及び図7にも示すように、左右両側面が開口された非円形断面の筒状をなし、その内部における中心より斜め前上方と後方に偏倚した位置には、それぞれ円形の軸孔(34a)を有する筒部(34)と、楕円形の軸孔(35a)を有する楕円状筒部(35)とが、カム部材(30)の内周面と一体的に連設されている。 As shown in the enlarged vertical side view of FIG. 5 and FIG. 7, the cam member (30) has a cylindrical shape with a non-circular cross section in which both left and right side surfaces are opened, and is obliquely forward and upward and rearward from the center in the inside. In the biased position, a cylindrical part (34) having a circular shaft hole (34a) and an elliptical cylindrical part (35) having an elliptical shaft hole (35a) are provided in the cam member (30). It is connected integrally with the peripheral surface.
筒部(34)の外周面とカム部材(30)の内周面、及び両筒部(34)(35)同士は、リブ(36)により結合されている。
筒部(35)における軸孔(35a)の長軸側の軸線は、筒部(34)の軸孔(34a)の中心と整合している。
Inner peripheral surface, and both the cylindrical portion (34) (35) between the outer peripheral surface and the cam member (30) of the cylindrical portion (34) are joined by ribs (36).
The axis on the long axis side of the shaft hole (35a) in the tube portion (35) is aligned with the center of the shaft hole (34a) of the tube portion (34).
カム部材(30)は、その円形の軸孔(34a)に、上記枢支ピン(24)を回動自在に嵌合するとともに、楕円形の軸孔(35a)に、上記操作レバー(28)の折曲部(28a)における枢支ピン(24)と平行をなす先端部(左端部)を回動自在に遊嵌することにより、連結金具(21)の両後向片(21a)間に回動可能に取付けられている。 The cam member (30) has the pivot pin (24) rotatably fitted in the circular shaft hole (34a) and the operation lever (28) in the elliptical shaft hole (35a). By loosely fitting the tip (left end) parallel to the pivot pin (24) in the bent portion (28a) of the bent portion (28a) between the two rear pieces (21a) of the connecting bracket (21) It is pivotally mounted.
カム部材(30)の外周面における軸孔(33)の斜め前下方には、ガススプリング(18)側に向かって傾斜することにより、その制御弁作動用のプッシュロッド(37)を押圧する偏心カム面(38)が形成され、またそれと連続する下部には、プッシュロッド(37)の頂面が嵌合する円弧状断面の凹溝(39)と、それと近接する反時計方向側にストッパ段部(40)とが形成されいる。 An eccentricity that pushes the push rod (37) for operating the control valve by inclining toward the gas spring (18) side obliquely forward and downward of the shaft hole (33) on the outer peripheral surface of the cam member (30). A cam surface (38) is formed, and a lower portion continuous with the cam surface (38) has a concave groove (39) having an arc-shaped cross section into which the top surface of the push rod (37) is fitted, and a stopper step on the counterclockwise side adjacent thereto. A part (40) is formed.
ストッパ段部(40)は、凹溝(39)がプッシュロッド(37)の頂面に嵌合したとき、ガススプリング(18)におけるピストンロッド(18a)の連結金具(21)よりの突出端部(41)の外周縁と当接し、カム部材(30)の時計方向の最大回動量が規制される(図8参照)。 The stopper step (40) is an end protruding from the coupling rod (21) of the piston rod (18a) in the gas spring (18) when the concave groove (39) is fitted to the top surface of the push rod (37). and the outer peripheral edge contact and (41), the maximum rotation amount in the clockwise direction of the cam member (30) is regulated (see FIG. 8).
また、この際、軸孔(35a)の中心と操作レバー(28)の回動中心とを結ぶ線が、枢支ピン(24)の中心よりも内方、すなわちガススプリング(18)側に位置するようになっている。
このようにすると、操作レバー(28)及び把手部(29)が操作状態に保持され、妄りに反対方向に回動することがなくなる。
At this time, the line connecting the center of the shaft hole (35a) and the rotation center of the operation lever (28) is located inward of the center of the pivot pin (24), that is, on the gas spring (18) side. It is supposed to be.
In this way, the operating lever (28) and the grip portion (29) is held in the operation state, and the turning child in opposite directions is eliminated without reason.
カム部材(30)の反時計方向の最大回動量は、その外周面が、ブラケット(19)の基片(19a)の後端に連設された斜め後ろ下方を向くストッパ片(42)と当接することにより、規制される。 The maximum counterclockwise rotation amount of the cam member (30) is in contact with the stopper piece (42) whose outer peripheral surface faces diagonally backward and downwardly connected to the rear end of the base piece (19a) of the bracket (19). It is regulated by touching.
この状態が、図7に示す非操作状態で、カム部材(30)の偏心カム面(38)の上端部がプッシュロッド(37)の頂端と摺接又は僅かに離間して、これを非押圧状態とする。 This state is the non-operating state shown in FIG. 7, and the upper end portion of the eccentric cam surface (38) of the cam member (30) is slidably contacted or slightly separated from the top end of the push rod (37) and is not pressed. State.
この際、軸孔(35a)の中心と操作レバー(28)の回動中心とを結ぶ直線は、上記とは反対に、枢支ピン(24)の中心よりも外方、すなわちガススプリング(18)より遠ざかる方向に変位し、操作レバー(28)及び把手部(29)が非操作位置に保持されるようになっている。 At this time, the straight line connecting the center of the shaft hole (35a) and the rotation center of the operation lever (28) is opposite to the above, more outward than the center of the pivot pin (24), that is, the gas spring (18 The control lever (28) and the handle (29) are held in the non-operation position.
図7におけるプッシュロッド(37)の非押圧状態では、ガススプリング(18)が任意の伸縮位置でロックされるため、背フレーム(3)及び背凭れ(4)の傾動は、ガススプリング(18)のロック位置の範囲内で行われる。 In the non-pressed state of the push rod (37) in FIG. 7, the gas spring (18) is locked at an arbitrary expansion / contraction position, so that the tilting of the back frame (3) and the backrest (4) causes the gas spring (18) to tilt. It is performed within the range of the lock position.
図8に示すように、把手部(29)を上向きに回動すると、操作レバー(28)における折曲部(28a)の先端部が下向きに回動することにより、カム部材(30)は時計方向に回動させられ、その偏心カム面(38)によりプッシュロッド(37)が徐々に押圧される。 As shown in FIG. 8, when the handle portion (29) is rotated upward, the distal end portion of the bent portion (28a) of the operation lever (28) is rotated downward, so that the cam member (30) is The push rod (37) is gradually pressed by the eccentric cam surface (38).
カム部材(30)のストッパ段部(40)がガススプリング(18)の突出端部(41)と当接する最大位置まで、把手部(29)を回動させると、カム部材(30)の凹溝(39)に、プッシュロッド(37)の頂面が嵌合することにより、該プッシュロッド(37)は、押圧状態に保持され、かつ操作レバー(28)と把手部(29)は、最大回動位置に停止させられる。 When the handle portion (29) is rotated to the maximum position where the stopper step portion (40) of the cam member (30) contacts the protruding end portion (41) of the gas spring (18), the cam member (30) is recessed. When the top surface of the push rod (37) is fitted into the groove (39), the push rod (37) is held in a pressed state, and the operation lever (28) and the handle portion (29) are Stopped at the pivot position.
これにより、ガススプリング(18)のピストンロッド(18a)は、自由に伸縮し、背凭れ(4)を軽く傾動させることができる。 Thereby, the piston rod (18a) of the gas spring (18) can freely expand and contract, and the backrest (4) can be lightly tilted.
上記把手部(29)を上下に最大位置まで回動させた際、枢支ピン(24)の拡径頭部(24a)が、操作レバー(28)における折曲部(28a)の後向き折曲部(28b)の回動領域内において、それと常に近接して対向するようになっており、枢支ピン(24)がブラケット(19)や連結金具(21)から抜け外れるのが防止されるようになっている(図4、図6参照)。 When the handle portion (29) is turned up and down to the maximum position, the enlarged head (24a) of the pivot pin (24) is bent backwards at the bent portion (28a) of the operating lever (28). In the rotation area of the part (28b), it always faces and is close to it so that the pivot pin (24) is prevented from coming off from the bracket (19) or the connecting bracket (21). (See FIGS. 4 and 6).
このようにすると、枢支ピン(24)の先端に、抜け止め用のスナップリング等を嵌め込む必要はなく、組立て時の作業能率が向上するとともに、部品点数も削減される。 In this way, it is not necessary to fit a snap ring or the like for retaining at the tip of the pivot pin (24), so that the work efficiency during assembly is improved and the number of parts is reduced.
上記実施形態では、本発明を、背凭れ(4)傾動用のガススナップリング(18)に適用した例を示しているが、脚杆(7)内に収容された、座体(2)の高さ調節用のガススプリングの操作装置としても適用することができる。 In the above embodiment, the present invention is applied to the gas snap ring (18) for tilting the backrest (4), but the seat (2) housed in the leg rod (7) is shown. It can also be applied as an operating device for a gas spring for height adjustment.
(1)脚体(固定部)
(2)座体
(3)背フレーム(可動部)
(4)背凭れ
(5)キャスタ
(6)脚
(7)脚杆
(8)支基
(9)座受フレーム
(10)座シェル
(11)クッション体
(12)側杆
(12a)カバー部材
(13)背シェル
(14)背当てクッション
(15)支軸
(16)(17)連結部材
(16a)傾斜板
(16b)水平片
(18)ガススプリング
(18a)ピストンロッド
(18b)シリンダ
(19)ブラケット
(19a)基片
(19b)側片
(19c)突片
(20)係合孔
(21)連結金具
(21a)後向片
(22)(23)通孔
(24)枢支ピン(枢軸)
(24a)拡径頭部
(25)支持片
(26)枢軸
(27)操作装置
(28)操作レバー
(28a)折曲部
(28b)後向折曲部
(29)把手部
(30)カム部材(押圧部材)
(31)ねじ
(32)保持金具
(32a)ストッパ片
(33)開口
(34)筒部
(34a)軸孔
(35)楕円状筒部
(35a)軸孔
(36)リブ
(37)プッシュロッド
(38)偏心カム面
(39)凹溝
(40)ストッパ段部
(41)突出端部
(42)ストッパ片
(1) Leg (fixed part)
(2) Seat
(3) Back frame (movable part)
(4) Backrest
(5) Casters
(6) Leg
(7) Legs
(8) Support base
(9) Seat frame
(10) seat shell
(11) Cushion body
(12) Side rod
(12a) Cover member
(13) Back shell
(14) Back cushion
(15) Spindle
(16) (17) Connecting member
(16a) Inclined plate
(16b) Horizontal piece
(18) Gas spring
(18a) Piston rod
(18b) Cylinder
(19) Bracket
(19a) Base piece
(19b) Side piece
(19c) Projection
(20) Engagement hole
(21) Connecting bracket
(21a) Rear piece
(22) (23) Through hole
(24) Pivot pin (Axis)
(24a) Expanded head
(25) Support piece
(26) Axis
(27) Operating device
(28) Control lever
(28a) Bending part
(28b) Backward bending
(29) Handle part
(30) Cam member (pressing member)
(31) Screw
(32) Retaining bracket
(32a) Stopper piece
(33) Opening
(34) Tube
(34a) Shaft hole
(35) Elliptical cylinder
(35a) Shaft hole
(36) Rib
(37) Push rod
(38) Eccentric cam surface
(39) Groove
(40) Stopper step
(41) Protruding end
(42) Stopper piece
Claims (2)
前記枢軸の一端に拡径頭部を形成するとともに、前記操作レバーを、前記拡径頭部の側方において前記枢軸の延長線と平行をなす軸線を中心として回動しうるように設け、前記操作レバーにおける前記押圧部材との連係部側の側端部に、前記枢軸の拡径頭部の端面と近接する方向にほぼ直角に折曲され、さらに先端部が前記枢軸と平行をなす方向にほぼ直角に折曲されたほぼクランク状の折曲部を形成し、このクランク状折曲部における前記枢軸と平行をなす先端部を、前記押圧部材における枢軸から離間した位置に回動自在に嵌合することにより、操作レバーの回動操作により、前記押圧部材を回動させうるようにし、かつ前記クランク状折曲部における拡径頭部の側方に位置する部分の回動領域を、常に拡径頭部の端面の一部と近接して対向する範囲内に制限することにより、前記枢軸を抜け止めしたことを特徴とする椅子におけるガススプリングの操作装置。 One end of the control spring push rod protruding from the gas spring is connected to the movable part of the chair by a pivot perpendicular to the axis of the gas spring, and the other end of the gas spring is connected to the chair fixing part. An apparatus for operating a gas spring in a chair that supports and pushes the push rod by a pressing member that is linked to an operating lever and that rotates about the pivot, thereby adjusting the position of the movable part. In
Forming an enlarged head at one end of the pivot, and providing the operation lever so as to be rotatable about an axis parallel to an extension line of the pivot at a side of the enlarged head; the side end portion of the linkage portion side of the pressing member in the operating lever, the pivot is bent substantially at right angles to the direction coming close to the end surface of the enlarged diameter head of a direction to be parallel and further tip the pivot A substantially crank-shaped bent portion bent substantially at a right angle is formed, and a tip portion parallel to the pivot axis in the crank-shaped bent portion is rotatably fitted at a position away from the pivot axis in the pressing member. By combining, it is possible to rotate the pressing member by the rotation operation of the operation lever, and the rotation region of the portion located on the side of the enlarged head at the crank-shaped bent portion is always Close to a part of the end face of the enlarged head By limiting the range of direction, the operating device of the gas spring in the chair, characterized in that it has retained the pivot.
Priority Applications (1)
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JP2003405959A JP4486352B2 (en) | 2003-12-04 | 2003-12-04 | Operation device for gas spring in chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003405959A JP4486352B2 (en) | 2003-12-04 | 2003-12-04 | Operation device for gas spring in chair |
Publications (2)
Publication Number | Publication Date |
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JP2005163966A JP2005163966A (en) | 2005-06-23 |
JP4486352B2 true JP4486352B2 (en) | 2010-06-23 |
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JP2003405959A Expired - Lifetime JP4486352B2 (en) | 2003-12-04 | 2003-12-04 | Operation device for gas spring in chair |
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JP (1) | JP4486352B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101165884B1 (en) | 2007-02-27 | 2012-07-13 | 가부시끼가이샤 오까무라세이사꾸쇼 | Locking device for a movable member in a chair |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529445U (en) * | 1991-10-04 | 1993-04-20 | 株式会社イトーキクレビオ | Operation member mounting structure for chair |
JPH0682942U (en) * | 1993-05-19 | 1994-11-29 | シロキ工業株式会社 | Reclining seat |
JPH11334341A (en) * | 1998-05-28 | 1999-12-07 | Denso Corp | Air conditioner for vehicle |
JP2003245153A (en) * | 2002-02-26 | 2003-09-02 | Okamura Corp | Gas spring operating device for seat |
JP2003325261A (en) * | 2003-06-23 | 2003-11-18 | Takano Co Ltd | Synchronous rocking device for chair |
-
2003
- 2003-12-04 JP JP2003405959A patent/JP4486352B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529445U (en) * | 1991-10-04 | 1993-04-20 | 株式会社イトーキクレビオ | Operation member mounting structure for chair |
JPH0682942U (en) * | 1993-05-19 | 1994-11-29 | シロキ工業株式会社 | Reclining seat |
JPH11334341A (en) * | 1998-05-28 | 1999-12-07 | Denso Corp | Air conditioner for vehicle |
JP2003245153A (en) * | 2002-02-26 | 2003-09-02 | Okamura Corp | Gas spring operating device for seat |
JP2003325261A (en) * | 2003-06-23 | 2003-11-18 | Takano Co Ltd | Synchronous rocking device for chair |
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JP2005163966A (en) | 2005-06-23 |
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