JP2004065509A - Forward and backward sliding device for seat of chair - Google Patents
Forward and backward sliding device for seat of chair Download PDFInfo
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- JP2004065509A JP2004065509A JP2002228487A JP2002228487A JP2004065509A JP 2004065509 A JP2004065509 A JP 2004065509A JP 2002228487 A JP2002228487 A JP 2002228487A JP 2002228487 A JP2002228487 A JP 2002228487A JP 2004065509 A JP2004065509 A JP 2004065509A
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- JP
- Japan
- Prior art keywords
- seat
- movable rail
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、椅子における座の前後摺動装置に関する。
【0002】
【従来の技術】
背凭れに寄り掛かる座者の荷重により、背凭れが後傾し、それに連動して、座が前後動する椅子は公知である。
本願出願人は、近年のOA機器の普及に対処して、たとえば机上のパソコンのキーボード使用時において、背凭れの後傾とは無関係に、背凭れや肘掛けに対する座の前後位置を微調節して、座者の座り心地を改善し、デスクワークの作業効率を向上させることを目的として、簡単な機構で、容易に座の前後位置の調節を行うことができる発明について、先に特許出願している(特開2002−136376号)。
【0003】
【発明が解決しようとする課題】
本発明は、前記目的と併せて、座の前後位置の調節を行う際に、その操作が容易であるとともに、調節後の位置を安定的に保持することができるようにした、椅子における座の前後摺動装置を提供することを目的とする。
【0004】
【課題を解決するための手段】
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) 椅子における脚柱の上端に取り付けた支基の左右に、ガイドレールを前後方向に設けるとともに、前記ガイドレールに、座の左右下方に設けた可動レールを、それぞれ前後摺動可能に取り付け、かつ前記左右のうちの少なくとも一方のガイドレールと可動レールに、互いに係合して座を前後方向の任意の位置で摺動不能にするとともに、座を上方に持ち上げることにより、前記係合が解除されて、座を摺動可能とする係合手段を設けたことを特徴とする椅子における座の前後摺動装置とする。
【0005】
(2) 上記(1)項において、ガイドレールから上方に向けて、上端に大径頭部を有するガイドピンを突設するとともに、可動レールに前記ガイドピンが前後摺動可能に嵌合する長孔を設け、ガイドピンの大径頭部と可動レールとの間に装着したばねによって、可動レールをガイドレールに弾性的に圧接させる。
【0006】
(3) 上記(2)項において、ガイドレールに係合部、可動レールに前記係合部と係合する被係合部をそれぞれ設け、通常は、ガイドピンの大径頭部と可動レールとの間に装着したばねの付勢によって、前記係合部と被係合部とが係合してガイドレールに対する可動レールの前後方向の摺動が阻止され、座の前部を前記ばねの付勢力に抗して上方に持ち上げることにより、前記係合が解除されて座の前後方向の摺動が可能となるようにする。
【0007】
(4) 上記(1)項〜(3)項のいずれかにおいて、ガイドレールと可動レールの、前部と後部のそれぞれに係合部と被係合部からなる係合手段を設け、座の前部を持ち上げて、前後部の係合手段の係合を解除して、座の前後方向の位置を調節した後、再び前記係合手段の係合を行う場合、先に後部の係合手段を係合させることによって、前部における係合手段の係合を容易にするための位置決めがなされるようにする。
【0008】
(5) 上記(1)項〜(3)項のいずれかにおいて、ガイドピンの大径頭部と、可動レールとの間に装着した、ばねの下端に係止部を設けるとともに、可動レールの上面に、前記係止部と係止する被係止部を設け、これら係止部と被係止部とを係止させることによって、可動レールとガイドレール間の係合手段の係合を容易にするための位置決めがなされるようにする。
【0009】
【発明の実施の形態】
以下、本発明の実施の形態を、添付図面を参照して説明する。
図1、図2は、それぞれ、本発明の一実施形態の座の前後摺動装置を備える椅子の正面図、および側面図である。
また、図3は、図1におけるIII〜III線横断面図、図4、図5は、それぞれ図3におけるIV〜IV線縦断面図、V〜V線縦断面図、図6は、図4におけるVI〜VI線縦断面図である。
【0010】
図1及び図2に示すように、この椅子は、先端部にキャスタ(1)が設けられた脚杆(2)を有する脚体(3)の中央に、ガススプリング(図示略)を備える伸縮式の脚柱(4)を立設し、脚柱(4)の上端に、支基(5)の後部を固着して形成されている。
支基(5)の内部には、背凭れ(6)及び座(7)の復帰用の付勢手段が設けられている。
【0011】
支基(5)の両側壁(5a)(5a)より左右に突出する支軸(8)の両端部には、背凭れ(6)を支持する側面視ほぼL字状の左右1対の背凭れ支持杆(9)(9)の前端部に設けた左右方向を向く筒部(9a)(9a)が固嵌されており、背凭れ(6)及び背凭れ支持杆(9)(9)は、支軸(8)と一体となって、後下方に傾動し得るようになっている。
左右の背凭れ支持杆(9)の下部における前向部の中間には、肘掛け(10)が、起立させて設けられている。
【0012】
左右の背凭れ支持杆(9)における筒部(9a)と肘掛け(10)との中間部には、上向きの座支持杆(11)が、一体的に設けられている。
【0013】
前記各座支持杆(11)の上端部外側面には、横杆(12)で互いに連結された前後方向を向く左右1対のガイドレール(13)の後端部が、左右方向を向く軸(14)をもって連結されている。
【0014】
前記左右のガイドレール(13)(13)の前端部は、支基(5)の両側壁(5a)(5a)の前部に設けられた外向きの筒部(15)(15)の外側に枢着された、上下方向を向く左右の支持リンク(16)(16)の上端部内側面に、左右方向を向く横軸(17)をもって連結されている。このように、ガイドレール(13)の前後端を支持する座支持杆(11)と支持リンク(16)の2つの支持金具の中、一方の支持金具をガイドレール(13)の内側側面に当接し、他方の支持金具をガイドレール(13)の外側側面に当接させて支持してある。
【0015】
前記支持リンク(16)の下端部は、前記筒部(15)の外側に、左右方向を向く横軸(18)をもって枢着され、かつ筒部(15)内に設けたねじりコイルばねにより、図2における反時計回りに付勢されている。
【0016】
背凭れ(6)及び背凭れ支持杆(9)(9)を、支軸(8)を中心として後下方に傾動させると、そのときの背凭れ支持杆(9)(9)と一体の座支持杆(11)(11)の後傾により、座(7)の後部は後下方に移動させられ、かつそれに連動して、座(7)の前部も、左右の支持リンク(16)(16)が、ねじりコイルばねの付勢力に抗して、後傾することにより、若干後下方に移動させられるようになっている。
【0017】
左右のガイドレール(13)(13)には、座(7)の下面より突設した短寸の脚座(19)(19)をもって、前後の端部が固着され、座(7)から離間した前後方向を向く左右1対の可動レール(20)(20)が装着されている。
【0018】
図4に示すように、座(7)の前後端の下面より突設した短寸の脚座(19)(19)の下面には、可動レール(20)の前後端部が、図示を省略したボルトによって固着されている。
【0019】
図3におけるIV〜IV線縦断面図である図4、および図4におけるVI〜VI線縦断面図である図6に示すように、可動レール(20)の前部および後部には、それぞれ前後方向に長い凹部(22)(23)が設けられ、これら凹部(22)(23)の底面(24)(25)には、凹部(22)(23)の左右幅よりも小さい幅で、凹部(22)(23)の長さよりもやや短い長さの前後方向の長孔(26)(27)が設けられている。
【0020】
一方、ガイドレール(13)の上面(13a)における、前記前後の長孔(26)(27)に対応する位置には、上端に大径頭部(28a)(29a)を有するガイドピン(28)(29)が上方に向けて突設され、このガイドピン(28)(29)は、前記長孔(26)(27)に、前後方向に摺動可能に嵌合し、ガイドピン(28)(29)の大径頭部(28a)(29a)は、可動レール(20)の上面(20a)とほぼ同じ高さに位置している。
【0021】
ガイドピン(28)(29)の軸部(28b)(29b)には、前記長孔(26)(27)の左右幅よりも径の大きいワッシャー(30)(31)が嵌められ、このワッシャー(30)(31)の上面と、前記大径頭部(28a)(29a)の下面との間の軸部(28b)(29b)には、コイルばね(32)(33)が装着され、これらコイルばね(32)(33)によって、可動レール(20)がガイドレール(13)に弾性的に圧接されている。
【0022】
また、図2、図3におけるV〜V線縦断面図である図5、および図6に示すように、ガイドレール(13)の上面(13a)における、前記前後のガイドピン(28)(29)のそれぞれ左右には、係合突起(34)(35)が設けられている。
【0023】
一方、可動レール(20)の下面(20b)における、前記長孔(26)(27)の左右には、それぞれ前記係合突起(34)(35)と係合する、左右方向の被係合凹部(36)(37)が前後方向に複数個、設けられている。
【0024】
前記被係合凹部(36)(37)は、可動レール(20)の前部と後部において、同じ数が同じ間隔で設けられている。
【0025】
通常は、前記コイルばね(32)(33)の付勢によって、可動レール(20)は、ガイドレール(13)に圧接されているため、係合突起(34)(35)と被係合凹部(36)(37)が係合しており、ガイドレール(13)に対する可動レール(20)の前後方向の摺動が阻止され、可動レール(20)と一体となっている座(7)の前後方向の位置は、安定的に固定されている。
【0026】
座(7)の前後方向の位置を調節したい場合には、座(7)の前部を、コイルばね(32)(33)の付勢力に抗して上方に持ち上げることにより、係合手段である係合突起(34)(35)と被係合凹部(36)(37)との係合が解除され、可動レール(20)がガイドレール(13)に対して前後方向に摺動自在となる。
【0027】
そのため、座(7)を所望とする前後位置に移動させた後に、持ち上げていた座(7)を元の高さに戻すことにより、その新たな前後位置において、係合突起(34)(35)と被係合凹部(36)(37)が再び係合し、座(7)の位置が固定される。
【0028】
なお、ガイドレール(13)における前部の係合突起(34)は、側面視を台形状のものとして、被係合凹部(36)との係合の安定性を図るとともに、係合解除のために、座(7)の前部を持ち上げて、座(7)を傾斜させた場合において、座(7)の後部近傍は、わずか程度しか上方に移動しないため、後部の係合突起(35)と被係合凹部(37)との係合の解除を容易とする目的で、後部の係合突起(35)は、側面視を半球状のものとしてある。
【0029】
すなわち、後部の係合突起(35)を、側面視において半球状のものとすることにより、座(7)の前部を持ち上げて、前部における係合突起(34)と被係合凹部(36)との係合を解除した後、座(7)を前方に引張ることにより、後部の係合突起(35)と被係合凹部(37)との係合は、被係合凹部(37)が、側面視が半球状の係合突起(35)を容易に乗り越えて、両者の係合が簡単に解除され、座(7)の前後方向の移動が可能となる。
【0030】
また、後部の係合突起(35)を、側面視において半球状のものとすることにより、座(7)の前後方向の位置を調節した後に、前部を持ち上げていた座(7)を、元の高さに戻して、係合突起(34)(35)と被係合凹部(36)(37)とを再び係合させようとする場合に、後部の係合突起(35)が側面視において半球状であるため、後部の被係合凹部(37)と容易に係合し、前部の係合突起(34)と被係合凹部(36)とが係合し得る位置に、座(7)を移動させるための位置決めの作用もする。
【0031】
図7は、本発明の別の実施形態を示し、図5に相当する図である。
【0032】
前記実施形態の場合と同様に、可動レール(38)の前部に前後方向の長孔(39)が設けられ、この長孔(39)に、ガイドレール(40)の上面(40a)に突設された、大径頭部(41a)を有するガイドピン(41)が、前後方向に摺動可能に嵌合されている。
【0033】
可動レール(38)の上面(38a)における、前記長孔(39)の左右両側の部分は、前後方向の波形に形成されている。
【0034】
一方、前記ガイドピン(41)には、大径頭部(41a)の下面(41b)をもって下向きに押圧された、板ばね(42)が装着されており、この板ばね(42)によって、可動レール(38)がガイドレール(40)に弾性的に圧接されている。すなわち、前記板ばね(42)は、図8に斜視図を示すように、側面視において山形をなし、その前後両下端が下向きの弧状をなし、平面視において中央に通孔(42a)を有する形状のものである。
【0035】
ガイドピン(41)の軸部(41c)を前記通孔(42a)に挿通し、板ばね(42)における前後両下端の下向きの弧状部(32b)(32b)を、可動レール(38)の上面(38a)の波状部(38b)に当接し、板ばね(42)の頂部上面(42c)を、ガイドピン(41)における大径頭部(41a)の下面(41b)で下向きに押圧することにより、可動レール(38)がガイドレール(40)に弾性的に圧接されている。
【0036】
ガイドレール(40)の上面(40a)における、ガイドピン(41)の左右には、係合突起(43)が設けられている。
【0037】
一方、可動レール(38)の下面(38c)における、前記長孔(39)の左右には、前記係合突起(43)と係合する左右方向の被係合凹部(44)が、前後方向に複数個設けられている。
【0038】
通常は、前記板ばね(42)の付勢によって、可動レール(38)は、ガイドレール(40)に圧接されているため、係合突起(43)と被係合凹部(44)が係合しており、ガイドレール(40)に対する可動レール(38)の前後方向の摺動が阻止され、可動レール(38)と一体となっている座(45)の前後方向の位置は、安定的に固定されている。
【0039】
座(45)の前後方向の位置を調節したい場合は、座(45)の前部を板ばね(42)の付勢力に抗して上方に持ち上げることにより、係合突起(43)と被係合凹部(44)との係合が解除され、可動レール(38)がガイドレール(40)に対して前後方向に摺動自在となる。
【0040】
そのため、座(45)を所望とする前後位置に移動させた後に、持ち上げていた座(45)を元の高さに戻すことにより、その新たな前後位置において、係合突起(43)と被係合凹部(44)が再び係合し、座(45)の位置が固定される。
【0041】
なお、本実施形態においては、係合手段は、ガイドレール(40)および可動レール(38)の前部のみに設けられており、後部には設けられていない。
【0042】
前の実施形態において、後部の係合手段が有していた、座(45)の前後位置を調節した後に再び係合させる際の位置決めの機能は、本実施形態においては、板ばね(42)が可動レール(38)の上面(38a)における波状部(38b)と係合することによって行われる。
【0043】
【発明の効果】
本発明によれば、下記の効果が奏せられる。
(1) 請求項1記載の発明によれば、座を持ち上げるだけで、ガイドレールと可動レールとの係合が解除されるとともに、座を元の高さに戻すことによって、再び前記係合がなされるため、簡単な操作によって容易に座を所望の前後位置に調節することができる。
【0044】
(2) 請求項2記載の発明によれば、ガイドレールに対する可動レールの位置安定性が良好であるとともに、ばねの付勢力に抗して座を持ち上げることにより、可動レールがガイドレールに対して前後方向に摺動可能となり、座の前後位置を容易に調節することができる。
【0045】
(3) 請求項3記載の発明によれば、上記(2)項と同様な効果が奏せられる。
【0046】
(4) 請求項4記載の発明によれば、座の前部を持ち上げて前後位置を調節した後に、座を元の高さに戻して、再びガイドレールと可動レール間の係合手段の係合を行う際に、前記係合がなされる位置に、座の前後位置が自動的に微調節されるため、手数を要しないで容易に係合させることができる。
【0047】
(5) 請求項5記載の発明によれば、上記(4)項と同様な効果が奏せられる。
【図面の簡単な説明】
【図1】本発明の一実施形態の座の前後摺動装置を備える椅子の正面図である。
【図2】同じく、側面図である。
【図3】図1におけるIII〜III線横断面図である。
【図4】図3におけるIV〜IV線縦断面図である。
【図5】図3におけるV〜V線縦断面図である。
【図6】図4におけるVI〜VI線縦断面図である。
【図7】本発明の座の前後摺動装置の別の実施形態を示し、図5に相当する図である。
【図8】本発明に用いる板ばねの斜視図である。
【符号の説明】
(1)キャスター
(2)脚杆
(3)脚体
(4)脚柱
(5)支基
(5a)側壁
(6)背凭れ
(7)座
(8)支軸
(9)背凭れ支持杆
(9a)筒部
(10)肘掛け
(11)座支持杆
(12)横杆
(13)ガイドレール
(13a)上面
(14)軸
(15)筒部
(16)支持リンク
(17)(18)横軸
(19)脚座
(20)可動レール
(20a)上面
(20b)下面
(22)(23)凹部
(24)(25)底面
(26)(27)長孔
(28)(29)ガイドピン
(28a)(29a)大径頭部
(28b)(29b)軸部
(30)(31)ワッシャー
(32)(33)コイルばね
(34)(35)係合突起
(36)(37)被係合凹部
(38)可動レール
(38a)上面
(38b)波状部
(38c)下面
(39)長孔
(40)ガイドレール
(40a)上面
(41)ガイドピン
(41a)大径頭部
(41b)下面
(41c)軸部
(42)板ばね
(42a)通孔
(42b)弧状部
(42c)頂部上面
(43)係合突起
(44)被係合凹部
(45)座[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a back and forth sliding device for a seat in a chair.
[0002]
[Prior art]
2. Description of the Related Art Chairs are known in which a backrest tilts rearward due to a load of a seater leaning on the backrest, and the seat moves back and forth in conjunction with the backrest.
In response to the spread of OA equipment in recent years, the present applicant has made fine adjustments to the front and rear positions of the seat with respect to the backrest and armrests, for example, when using the keyboard of a personal computer on a desk, regardless of the backward tilt of the backrest. For the purpose of improving the sitting comfort of the occupant and improving the work efficiency of desk work, a patent application has been filed for an invention that can easily adjust the front and rear position of the seat with a simple mechanism. (JP-A-2002-136376).
[0003]
[Problems to be solved by the invention]
The present invention provides, in addition to the above object, an easy-to-operate operation when adjusting the front-rear position of the seat, and is capable of stably maintaining the adjusted position. It is an object to provide a front-rear sliding device.
[0004]
[Means for Solving the Problems]
According to the present invention, the above-mentioned problem is solved as follows.
(1) Guide rails are provided in the front-rear direction on the left and right sides of a support base attached to the upper end of a pillar in a chair, and movable rails provided on the left and right sides of the seat are mounted on the guide rails so as to be slidable in the front-rear direction. And, at least one of the left and right guide rails and the movable rail are engaged with each other so that the seat cannot slide at any position in the front-rear direction, and the seat is lifted upward, whereby the engagement is achieved. A seat back-and-forth sliding device in a chair, characterized in that an engagement means is provided which is released and allows the seat to slide.
[0005]
(2) In the above item (1), a guide pin having a large diameter head at an upper end is protruded upward from the guide rail, and the guide pin is fitted to the movable rail so as to be slidable back and forth. A hole is provided, and the movable rail is elastically pressed against the guide rail by a spring mounted between the large-diameter head of the guide pin and the movable rail.
[0006]
(3) In the above item (2), the guide rail is provided with an engaging portion, and the movable rail is provided with an engaged portion which engages with the engaging portion. The biasing force of the spring mounted between them causes the engaging portion and the engaged portion to engage, preventing sliding of the movable rail with respect to the guide rail in the front-rear direction. By lifting upward against the force, the engagement is released and the seat can be slid in the front-rear direction.
[0007]
(4) In any one of the above items (1) to (3), engaging means including an engaging portion and an engaged portion is provided at each of a front portion and a rear portion of the guide rail and the movable rail, and When the front part is lifted to disengage the engagement means of the front and rear parts and adjust the position of the seat in the front-rear direction, and then to engage the engagement means again, first, the rear engagement means Is engaged, so that positioning for facilitating engagement of the engagement means at the front portion is performed.
[0008]
(5) In any one of the above items (1) to (3), a locking portion is provided at a lower end of a spring mounted between the large diameter head of the guide pin and the movable rail, and the movable rail is A locked portion that locks with the locking portion is provided on the upper surface, and the locking portion and the locked portion are locked to facilitate engagement of the engagement means between the movable rail and the guide rail. In order to perform the positioning.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 and 2 are a front view and a side view, respectively, of a chair provided with a seat back-and-forth sliding device according to an embodiment of the present invention.
3 is a cross-sectional view taken along the line III-III in FIG. 1, FIGS. 4 and 5 are vertical cross-sectional views taken along the lines IV-IV, V-V in FIG. 3, and FIG. 6 is a vertical sectional view taken along line VI-VI in FIG.
[0010]
As shown in FIGS. 1 and 2, this chair is provided with a gas spring (not shown) in the center of a leg (3) having a leg (2) provided with a caster (1) at the tip. A pillar (4) of the type is erected, and the rear part of the support (5) is fixed to the upper end of the pillar (4).
A biasing means for returning the backrest (6) and the seat (7) is provided inside the support base (5).
[0011]
At both ends of a support shaft (8) protruding left and right from both side walls (5a) and (5a) of the support base (5), a pair of left and right backs which support a backrest (6) and are substantially L-shaped in side view are provided. Right and left-facing cylindrical portions (9a) (9a) provided at the front ends of the back support rods (9) (9) are fixedly fitted, and the backrest (6) and the back support rods (9) (9). Can be tilted rearward and downward integrally with the support shaft (8).
An armrest (10) is provided upright in the middle of the lower part of the left and right backrest supporting rods (9) in the forward direction.
[0012]
An upwardly facing seat support rod (11) is integrally provided at an intermediate portion between the tubular portion (9a) and the armrest (10) in the left and right backrest support rods (9).
[0013]
The rear end of a pair of left and right guide rails (13), which are connected to each other by a horizontal rod (12) and are oriented in the front-rear direction, are provided on the outer surface of the upper end of each of the seat support rods (11). (14).
[0014]
The front ends of the left and right guide rails (13) and (13) are outside of outwardly facing tubular portions (15) and (15) provided at the front portions of both side walls (5a) and (5a) of the support base (5). The left and right support links (16) (16), which are pivotally attached to the left and right, are connected to the inner surfaces of the upper ends at the horizontal axis (17). As described above, one of the two support members, the seat support rod (11) and the support link (16), which supports the front and rear ends of the guide rail (13), is applied to the inner side surface of the guide rail (13). The other support metal is in contact with and supported by the outer side surface of the guide rail (13).
[0015]
The lower end of the support link (16) is pivotally mounted on the outside of the cylindrical portion (15) with a horizontal axis (18) facing left and right, and is provided by a torsion coil spring provided in the cylindrical portion (15). It is biased counterclockwise in FIG.
[0016]
When the backrest (6) and the backrest supporting rods (9) and (9) are tilted rearward and downward around the support shaft (8), a seat integrated with the backrest supporting rods (9) and (9) at that time. The rear portion of the seat (7) is moved rearward and downward by the rearward inclination of the support rods (11) and (11), and in conjunction therewith, the front portion of the seat (7) also moves the left and right support links (16) ( 16) is slightly moved rearward and downward by tilting backward against the biasing force of the torsion coil spring.
[0017]
The left and right guide rails (13) and (13) have short leg seats (19) and (19) protruding from the lower surface of the seat (7), and front and rear ends thereof are fixed, and are separated from the seat (7). A pair of left and right movable rails (20) (20) facing the front-rear direction is mounted.
[0018]
As shown in FIG. 4, the front and rear ends of the movable rail (20) are not shown on the lower surfaces of the short leg seats (19) and (19) projecting from the lower surfaces of the front and rear ends of the seat (7). Bolts.
[0019]
As shown in FIG. 4 which is a vertical sectional view taken along the line IV-IV in FIG. 3, and FIG. 6 which is a vertical sectional view taken along the line VI-VI in FIG. Recesses (22) and (23) which are long in the direction, are provided on the bottom surfaces (24) and (25) of the recesses (22) and (23) with a width smaller than the lateral width of the recesses (22) and (23). Long holes (26) and (27) in the front-rear direction having a length slightly shorter than the lengths of (22) and (23) are provided.
[0020]
On the other hand, on the upper surface (13a) of the guide rail (13), a guide pin (28) having a large-diameter head (28a) (29a) at the upper end is provided at a position corresponding to the front and rear long holes (26) and (27). ) And (29) project upward, and the guide pins (28) and (29) are fitted in the elongated holes (26) and (27) so as to be slidable in the front-rear direction. The large diameter heads (28a) and (29a) of () and (29) are located at substantially the same height as the upper surface (20a) of the movable rail (20).
[0021]
Washers (30) and (31) having a diameter larger than the left and right widths of the long holes (26) and (27) are fitted to the shaft portions (28b) and (29b) of the guide pins (28) and (29). Coil springs (32) and (33) are mounted on shaft portions (28b) and (29b) between the upper surfaces of (30) and (31) and the lower surfaces of the large-diameter heads (28a) and (29a), The movable rail (20) is elastically pressed against the guide rail (13) by the coil springs (32) and (33).
[0022]
As shown in FIGS. 5 and 6, which are vertical sectional views taken along line V-V in FIGS. 2 and 3, the front and rear guide pins (28) (29) on the upper surface (13a) of the guide rail (13). ) Are provided with engagement projections (34) and (35) on the left and right, respectively.
[0023]
On the other hand, on the left and right sides of the elongated holes (26) and (27) on the lower surface (20b) of the movable rail (20), the left and right engaged portions engage with the engaging projections (34) and (35), respectively. A plurality of concave portions (36) (37) are provided in the front-rear direction.
[0024]
The same number of the engaged concave portions (36) and (37) are provided at the same interval at the front part and the rear part of the movable rail (20).
[0025]
Normally, the movable rail (20) is pressed against the guide rail (13) by the bias of the coil springs (32) and (33). (36) and (37) are engaged to prevent sliding of the movable rail (20) in the front-rear direction with respect to the guide rail (13), and the seat (7) integrated with the movable rail (20) is formed. The position in the front-back direction is stably fixed.
[0026]
When it is desired to adjust the position of the seat (7) in the front-rear direction, the front portion of the seat (7) is lifted upward against the urging force of the coil springs (32) and (33), so that the engagement means can be used. The engagement between the engagement projections (34) and (35) and the engaged recesses (36) and (37) is released, and the movable rail (20) is slidable in the front-rear direction with respect to the guide rail (13). Become.
[0027]
Therefore, after the seat (7) is moved to the desired front and rear position, the raised seat (7) is returned to the original height, so that the engagement projections (34) and (35) are at the new front and rear positions. ) And the engaged concave portions (36) and (37) are engaged again, and the position of the seat (7) is fixed.
[0028]
The front engagement projection (34) of the guide rail (13) has a trapezoidal shape when viewed from the side, so that the engagement with the engaged recess (36) is stabilized and the engagement projection (34) is released. Therefore, when the front portion of the seat (7) is lifted and the seat (7) is tilted, the vicinity of the rear portion of the seat (7) moves only slightly upward, so that the engagement protrusion (35) of the rear portion is formed. In order to facilitate the release of the engagement between the engaged concave portion (37) and the engaged concave portion (37), the rear engaging projection (35) has a hemispherical shape in a side view.
[0029]
That is, by making the rear engagement projection (35) hemispherical in a side view, the front part of the seat (7) is lifted, and the engagement projection (34) at the front part and the engaged recess ( 36, the seat (7) is pulled forward, so that the engagement between the rear engaging projection (35) and the engaged concave portion (37) is changed to the engaged concave portion (37). ) Easily crosses over the hemispherical engagement protrusion (35) in side view, the engagement between them is easily released, and the seat (7) can be moved in the front-rear direction.
[0030]
In addition, by making the rear engagement projection (35) hemispherical in a side view, the seat (7) that lifts the front part after adjusting the position of the seat (7) in the front-rear direction can be used. When the engaging projections (34) and (35) are to be returned to their original heights and the engaged concave portions (36) and (37) are to be engaged again, the rear engaging projections (35) may Since it is hemispherical in view, it easily engages with the engaged recess (37) at the rear, and is positioned at a position where the engaging projection (34) at the front and the engaged recess (36) can engage. It also acts as a positioning for moving the seat (7).
[0031]
FIG. 7 shows another embodiment of the present invention and is a diagram corresponding to FIG.
[0032]
As in the case of the above-described embodiment, a long hole (39) in the front-rear direction is provided at the front of the movable rail (38), and the long hole (39) projects from the upper surface (40a) of the guide rail (40). A provided guide pin (41) having a large-diameter head (41a) is fitted slidably in the front-rear direction.
[0033]
The left and right sides of the long hole (39) on the upper surface (38a) of the movable rail (38) are formed in a waveform in the front-rear direction.
[0034]
On the other hand, a leaf spring (42), which is pressed downward with the lower surface (41b) of the large-diameter head (41a), is mounted on the guide pin (41), and is movable by the leaf spring (42). The rail (38) is elastically pressed against the guide rail (40). That is, as shown in a perspective view in FIG. 8, the leaf spring (42) has a mountain shape in a side view, its front and rear lower ends have a downwardly arcuate shape, and has a through hole (42a) in the center in a plan view. Of shape.
[0035]
The shaft portion (41c) of the guide pin (41) is inserted into the through hole (42a), and the downwardly curved portions (32b) (32b) of the front and rear lower ends of the leaf spring (42) are connected to the movable rail (38). The upper surface (42c) of the leaf spring (42) is pressed downward by the lower surface (41b) of the large-diameter head (41a) of the guide pin (41) by abutting on the wavy portion (38b) of the upper surface (38a). Thereby, the movable rail (38) is elastically pressed against the guide rail (40).
[0036]
On the upper surface (40a) of the guide rail (40), engagement projections (43) are provided on the left and right of the guide pin (41).
[0037]
On the other hand, on the lower surface (38c) of the movable rail (38), on the left and right of the elongated hole (39), there are left and right engaged concave portions (44) that engage with the engaging projections (43). Are provided in plurality.
[0038]
Normally, the movable rail (38) is pressed against the guide rail (40) by the urging of the leaf spring (42), so that the engaging projection (43) and the engaged concave portion (44) are engaged. The sliding of the movable rail (38) in the front-rear direction with respect to the guide rail (40) is prevented, and the position of the seat (45) integrated with the movable rail (38) in the front-rear direction is stably maintained. Fixed.
[0039]
When it is desired to adjust the position of the seat (45) in the front-rear direction, the front portion of the seat (45) is lifted upward against the urging force of the leaf spring (42) so as to engage with the engagement projection (43). The engagement with the mating recess (44) is released, and the movable rail (38) is slidable in the front-rear direction with respect to the guide rail (40).
[0040]
Therefore, after the seat (45) is moved to a desired front-back position, the raised seat (45) is returned to the original height, so that the engagement protrusion (43) is covered with the new front-back position. The engagement recesses (44) engage again, and the position of the seat (45) is fixed.
[0041]
In the present embodiment, the engagement means is provided only on the front part of the guide rail (40) and the movable rail (38), and is not provided on the rear part.
[0042]
In the present embodiment, the positioning function of the rear engaging means when the seat (45) is re-engaged after the front-rear position is adjusted is a leaf spring (42) in the present embodiment. Is engaged with the wavy portion (38b) on the upper surface (38a) of the movable rail (38).
[0043]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) According to the first aspect of the present invention, by merely lifting the seat, the engagement between the guide rail and the movable rail is released, and by returning the seat to the original height, the engagement is resumed. Therefore, the seat can be easily adjusted to a desired front-rear position by a simple operation.
[0044]
(2) According to the second aspect of the invention, the position stability of the movable rail with respect to the guide rail is good, and the movable rail is moved with respect to the guide rail by lifting the seat against the urging force of the spring. It is slidable in the front-rear direction, and the front-rear position of the seat can be easily adjusted.
[0045]
(3) According to the third aspect of the invention, the same effect as the above item (2) can be obtained.
[0046]
(4) According to the invention as set forth in claim 4, after the front portion of the seat is lifted to adjust the front-rear position, the seat is returned to the original height, and the engagement of the engagement means between the guide rail and the movable rail is again achieved. When performing the engagement, the front and rear positions of the seat are automatically and finely adjusted to the positions where the engagement is performed, so that the seat can be easily engaged without requiring any trouble.
[0047]
(5) According to the invention described in
[Brief description of the drawings]
FIG. 1 is a front view of a chair provided with a seat back-and-forth sliding device according to an embodiment of the present invention.
FIG. 2 is also a side view.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a vertical sectional view taken along line IV-IV in FIG. 3;
FIG. 5 is a vertical sectional view taken along line V-V in FIG. 3;
6 is a vertical sectional view taken along line VI-VI in FIG. 4;
7 shows another embodiment of the seat back-and-forth sliding device of the present invention, and is a view corresponding to FIG.
FIG. 8 is a perspective view of a leaf spring used in the present invention.
[Explanation of symbols]
(1) Caster (2) Leg (3) Leg (4) Pillar (5) Support (5a) Side wall (6) Backrest (7) Seat (8) Support shaft (9) Backrest support rod ( 9a) cylindrical part (10) armrest (11) seat support rod (12) horizontal rod (13) guide rail (13a) upper surface (14) shaft (15) cylindrical part (16) support link (17) (18) horizontal axis (19) Leg seat (20) Movable rail (20a) Upper surface (20b) Lower surface (22) (23) Recess (24) (25) Bottom surface (26) (27) Slot (28) (29) Guide pin (28a) (29a) Large-diameter head (28b) (29b) Shaft (30) (31) Washer (32) (33) Coil spring (34) (35) Engagement protrusion (36) (37) Engagement concave (38) Movable rail (38a) Upper surface (38b) Wavy portion (38c) Lower surface (39) Slot (40) Guide rail (40a) Surface (41) Guide pin (41a) Large diameter head (41b) Lower surface (41c) Shaft (42) Leaf spring (42a) Through hole (42b) Arc-shaped portion (42c) Top upper surface (43) Engagement protrusion (44) ) Engaged recess (45) seat
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002228487A JP4153748B2 (en) | 2002-08-06 | 2002-08-06 | Seat front / rear sliding device in a chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002228487A JP4153748B2 (en) | 2002-08-06 | 2002-08-06 | Seat front / rear sliding device in a chair |
Publications (2)
Publication Number | Publication Date |
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JP2004065509A true JP2004065509A (en) | 2004-03-04 |
JP4153748B2 JP4153748B2 (en) | 2008-09-24 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002228487A Expired - Fee Related JP4153748B2 (en) | 2002-08-06 | 2002-08-06 | Seat front / rear sliding device in a chair |
Country Status (1)
Country | Link |
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JP (1) | JP4153748B2 (en) |
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2002
- 2002-08-06 JP JP2002228487A patent/JP4153748B2/en not_active Expired - Fee Related
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