JP4908954B2 - Front / rear position adjustment device for seat body in chair - Google Patents

Front / rear position adjustment device for seat body in chair Download PDF

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JP4908954B2
JP4908954B2 JP2006194855A JP2006194855A JP4908954B2 JP 4908954 B2 JP4908954 B2 JP 4908954B2 JP 2006194855 A JP2006194855 A JP 2006194855A JP 2006194855 A JP2006194855 A JP 2006194855A JP 4908954 B2 JP4908954 B2 JP 4908954B2
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seat
engaged
seat body
shaft
engaging
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JP2008018192A (en
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洋一郎 小田
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Okamura Corp
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Okamura Corp
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Description

本発明は、椅子における座体の前後位置を、レバー操作により段階的に調節しうるようにした座体の前後位置調節装置に関する。   TECHNICAL FIELD The present invention relates to a seat front / rear position adjustment apparatus that can adjust the front / rear position of a seat in a chair stepwise by lever operation.

この種の椅子における座体の前後位置調節装置としては、例えば特許文献1及び2に記載されているものがある。
実開平4−43140号公報 特開2004−49655号公報
As a seat body front-rear position adjusting device in this type of chair, for example, there are devices described in Patent Documents 1 and 2.
Japanese Utility Model Publication No. 4-43140 JP 2004-49655 A

上記特許文献1に記載されている座体の前後位置調節装置においては、脚体の上部に設けた座支持部材(スライド枠)の左右方向の中央部に、前後複数のロック孔を設け、座体下部のスライド案内枠の側面に枢着した操作レバーに、上記ロック孔に先端部が選択的に係合する左右方向に長い係止杆を取付けているため、位置調節装置全体の左右寸法が大となるとともに、ロック孔に係止杆が係合した状態で、座体に前後方向の強い力が加わった際に、係止杆やその支持部が変形する恐れがある。   In the seat front / rear position adjusting apparatus described in Patent Document 1, a plurality of front and rear lock holes are provided in the center in the left-right direction of a seat support member (slide frame) provided on the upper portion of the leg, Since the operation lever pivotally attached to the side of the slide guide frame at the lower part of the body is attached with a locking lever that is long in the left-right direction with the tip part selectively engaged with the lock hole, the left-right dimension of the entire position adjusting device is In addition to the increase in size, the locking rod and its supporting portion may be deformed when a strong force in the front-rear direction is applied to the seat body with the locking rod engaged with the lock hole.

また、座体の前後位置を調節する際には、係止杆の先端部をロック孔より完全に離脱させて、他のロック孔に係合する必要があるため、操作レバーの回動操作量が大きくなり、操作性が悪くなる。   Also, when adjusting the front / rear position of the seat, it is necessary to completely disengage the tip of the locking rod from the lock hole and engage with another lock hole. Becomes larger and the operability becomes worse.

特許文献2に記載のものにおいては、脚体上部の座支持部材(ガイドレール)の外側面に、前後複数の被係合部(係合溝)を設け、座支持部材上を前後に摺動する座体下部の可動レールの外側面に、上記被係合部に選択的に係合する係合部(係合突起)を備える操作レバーを、上下に回動可能に枢着しているため、被係合部に対し、係合部と操作レバーとが近接し、上記特許文献1のような問題の生じる恐れはない。   In the one described in Patent Document 2, a plurality of front and rear engaged portions (engagement grooves) are provided on the outer surface of the seat support member (guide rail) at the upper part of the leg, and slide on the seat support member back and forth. An operation lever having an engagement portion (engagement protrusion) that selectively engages with the engaged portion is pivotally attached to the outer surface of the movable rail below the seat body so as to be pivotable up and down. The engaging portion and the operation lever are close to the engaged portion, and there is no possibility of causing the problem as described in Patent Document 1.

しかし、被係合部が座支持部材の外側面に設けられ、それが外部に露呈しているため、椅子の体裁が悪く、かつ座支持部材に手を触れたときの手触り感も悪い。   However, since the engaged portion is provided on the outer side surface of the seat support member and exposed to the outside, the appearance of the chair is poor and the touch feeling when the hand is touched to the seat support member is also poor.

本発明は、上記問題点に鑑みてなされもので、被係合部に対し、係合部を接近する方向に移動させて、それらの係合状態が解除されるようにし、装置全体を小型化するとともに、操作レバーの操作性を向上させ、かつ被係合部や係合部が外部に露呈するのを防止することにより、体裁を向上させうるようにした椅子における座体の前後位置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 by moving the engaging portion toward the engaged portion in the approaching direction, the engagement state is released, and the entire apparatus is reduced in size. And improving the operability of the operation lever and preventing the engaged portion and the engaging portion from being exposed to the outside, thereby improving the appearance of the seat body in the chair in the longitudinal position adjustment device. The purpose is to provide.

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)脚体に設けた座支持フレームにより、座体を、ガイド手段をもって前後に移動可能に支持し、前記座支持フレームに設けた前後複数の被係合部に、前記座体に設けた操作レバーに連係された係合部を選択的に係合させることにより、座体の前後位置を段階的に調節しうるようにした椅子における座体の前後位置調節装置において、前記被係合部を、前記座支持フレームに形成した左右両方向に開口する前後方向を向く長孔の対向面に設け、前後方向を向く軸回りに回動しうるようにした前記操作レバーに、左右方向を向く作動軸を、操作レバーの回動操作により前記長孔と直交する方向に移動しうるように連係し、この作動軸の先端に、前記係合部を、前記被係合部と常時係合するように設け、かつ係合部よりも基端寄りの作動軸に、前記被係合部を前後方向に通過可能な、前記係合部よりも小径をなす小径部を設け、前記操作レバーの回動操作時に前記小径部が被係合部と対向する位置に移動することにより、係合部と被係合部との係合が解除されるようにする。
According to the present invention, the above problem is solved as follows.
(1) A seat support frame provided on the leg body supports the seat body so as to be movable back and forth with guide means, and is provided on the seat body at a plurality of front and rear engaged portions provided on the seat support frame. In the seat front / rear position adjustment device for a chair, the front / rear position of the seat can be adjusted stepwise by selectively engaging the engaging portion linked to the operation lever. Is provided on the opposing surface of the long hole facing in the front-rear direction that opens in both the left and right directions formed in the seat support frame, and the operation lever that is turned around the axis that faces in the front-rear direction is operated in the left-right direction. The shaft is linked so that it can be moved in a direction orthogonal to the long hole by rotating the operation lever, and the engaging portion is always engaged with the engaged portion at the tip of the operating shaft. To the operating shaft closer to the base end than the engaging portion, A small-diameter portion having a smaller diameter than the engaging portion, which can pass through the engaged portion in the front-rear direction, is provided, and the small-diameter portion moves to a position facing the engaged portion when the operation lever is rotated. Thus, the engagement between the engaging portion and the engaged portion is released.

(2)上記(1)項において、長孔の対向面に、小径軸が前後方向に通過可能な狭窄部を、所定間隔おきに複数形成し、互いに隣接する狭窄部間を、係合部が係脱する被係合部とする。 (2) In the above item (1), a plurality of narrow portions that allow the small-diameter axis to pass in the front-rear direction are formed on the opposing surfaces of the long holes at predetermined intervals, and the engaging portions are located between the adjacent narrow portions. The engaged part is engaged and disengaged.

(3)上記(1)または(2)項において、座支持フレームが、左右1対の側部フレームを備える一方、座体の下面に、前記両側部フレーム上を前後に摺動する左右1対のスライド板を備えるスライドフレームを設け、前記一方の側部フレームの内側面に、被係合部を有する長孔を設けるとともに、前記側部フレームと対向する前記一方のスライド板に、操作レバーと、作動軸とを、操作レバーの上向き回動操作時に、係合部が座体の内方より外側方に移動して、長孔の被係合部より離脱するように設ける。 (3) In the above paragraph (1) or (2), the seat support frame is provided with a pair of left and right side frames, while a pair of left and right sides slides back and forth on the both side frames on the lower surface of the seat body. A slide frame provided with a slide plate, an elongated hole having an engaged portion on the inner surface of the one side frame, and an operation lever on the one slide plate facing the side frame. The actuating shaft is provided so that the engaging portion moves outward from the inside of the seat body and disengages from the engaged portion of the elongated hole when the operating lever is turned upward.

(4)上記(3)項において、操作レバーの把手部と反対側の端部に、作動軸に上方より跨嵌する二股状の作動片を連設し、この作動片と作動軸とを前後方向を向くピンにより連動可能に連結する。 (4) In the above item (3), a bifurcated working piece straddling the working shaft from above is connected to the end of the operating lever opposite to the handle, and the working piece and the working shaft are It is connected so that it can be interlocked by a pin that points in the direction.

(5)上記(1)〜(4)項のいずれかにおいて、作動軸を、座体に設けたガイド筒により摺動可能に保持する。 (5) In any one of the above items (1) to (4), the operating shaft is slidably held by a guide tube provided on the seat body.

(6)上記(1)〜(5)項のいずれかにおいて、作動軸を、その係合部が被係合部と係合する方向に常時付勢する付勢手段を設ける。 (6) In any one of the above items (1) to (5), an urging means for constantly urging the operating shaft in a direction in which the engaging portion engages with the engaged portion is provided.

(7)上記(1)〜(6)項のいずれかにおいて、ガイド手段が、座体と座支持フレームとの対向面のいずれか一方に設けられた左右1対の前後方向を向くガイド長孔と、このガイド長孔を挿通して前記座体と座支持フレームとの他方の対向面に固定され、かつ上下いずれか一方の端部に、前記ガイド長孔の左右幅よりも大きい拡径頭部を有する取付具とを備えるものとする。 (7) In any one of the above items (1) to (6), the guide means has a pair of left and right guide slots provided on either one of the opposing surfaces of the seat body and the seat support frame. And an enlarged head that is fixed to the other facing surface of the seat body and the seat support frame through the guide long hole and is larger than the left and right width of the guide long hole at one of the upper and lower ends. And a fixture having a portion.

(8)上記(7)項において、ガイド長孔の前後いずれか一方の端部に、取付具の拡径頭部が挿通可能な大径の挿通孔を、ガイド長孔と連続させて設けるととともに、座体に、操作レバーが非操作位置で当接する当接部材を、前後方向に移動可能に設け、この当接部材を、操作レバーの回動領域から外れる位置まで移動させて、該操作レバーを通常の操作と反対方向に回動操作することにより、被係合部が設けられている長孔に突入している係合部を該長孔より離脱させ、座体を、前記取付具の拡径頭部が挿通孔に位置するまで前後方向に移動しうるようにする。 (8) In the above item (7), when a large-diameter insertion hole through which the enlarged head of the fixture can be inserted is provided at either one of the front and rear ends of the guide long hole so as to be continuous with the guide long hole. In addition, the seat member is provided with a contact member that contacts the operating lever at the non-operating position so as to be movable in the front-rear direction, and the contact member is moved to a position that deviates from the rotation region of the operating lever. By rotating the lever in the direction opposite to the normal operation, the engaging portion protruding into the long hole in which the engaged portion is provided is separated from the long hole, and the seat body is attached to the fixture. It is possible to move in the front-rear direction until the enlarged diameter head of the head is positioned in the insertion hole.

請求項1記載の発明によれば、操作レバーを回動操作すると、作動軸が長孔と接近する方向に移動して、作動軸に設けた小径部が被係合部と対向するとともに、係合部と被係合部との係合が解除されるようになっているため、係合部と被係合部を有する長孔とを近づけることが可能なる。
その結果、作動軸を短寸としたり、操作レバーと作動軸とを近い位置で連係することができ、装置全体を小型化することができる。
According to the first aspect of the present invention, when the operating lever is turned, the operating shaft moves in a direction approaching the elongated hole, the small-diameter portion provided on the operating shaft faces the engaged portion, and Since the engagement between the joint portion and the engaged portion is released, it is possible to bring the engaging portion and the long hole having the engaged portion closer to each other.
As a result, the operating shaft can be shortened, or the operation lever and the operating shaft can be linked at a close position, and the entire apparatus can be reduced in size.

また、長孔から係合部が完全に離脱することなく、係合状態を解除して座体の前後位置を調節しうるので、操作レバーの回動操作量を小さくすることができ、その操作性が向上する。
さらに、ロック解除時には、小径部が長孔内の被係合部と対向しているので、ロック解除時に座体が浮き上がるなどする恐れはない。
係合部と被係合部とは、長孔内において係脱するので、それらが外部に露呈せず、体裁が向上する。
In addition, the engagement portion can be released and the front / rear position of the seat body can be adjusted without completely disengaging the engagement portion from the long hole, so that the amount of rotation of the operation lever can be reduced. Improves.
Furthermore, since the small diameter portion faces the engaged portion in the long hole when the lock is released, there is no fear that the seat body will be lifted when the lock is released.
Since the engaging portion and the engaged portion are engaged and disengaged in the long hole, they are not exposed to the outside, and the appearance is improved.

請求項2記載の発明によれば、被係合部が長孔の前後方向に沿って連続して形成されるので、係合部との係脱が容易となり、座体の前後位置の調節を速やかに行うことができる。   According to the second aspect of the present invention, since the engaged portion is continuously formed along the longitudinal direction of the long hole, the engagement with the engaging portion is facilitated, and the front and rear position of the seat body can be adjusted quickly. Can be done.

請求項3記載の発明によれば、被係合部を有する長孔は、座支持フレームにおける側部フレームの内側面に設けられ、作動軸の係合部が、内方より外側方に移動して、長孔の被係合部より離脱するようにしているため、係合部や被係合部、及び長孔はより目立ちにくくなり、体裁がさらに向上する。
また、前後位置調節装置全体を、座体の一側部にコンパクトに設けることができる。
According to the third aspect of the present invention, the long hole having the engaged portion is provided on the inner side surface of the side frame in the seat support frame, and the engaging portion of the operating shaft moves outward from the inner side. Therefore, the engagement portion, the engaged portion, and the long hole are less noticeable, and the appearance is further improved.
Further, the entire front-rear position adjusting device can be provided compactly on one side of the seat body.

請求項4記載の発明によれば、操作レバーと作動軸とを、近接した状態で直接連結しうるとともに、作動軸は前後より作動片により挟持されているので、作動軸及びそれと一体をなす係合部を、左右方向に確実に移動させることができる。   According to the fourth aspect of the present invention, the operating lever and the operating shaft can be directly connected in close proximity, and the operating shaft is clamped by the operating piece from the front and rear, so that the operating shaft and the integral therewith are engaged. The joint portion can be reliably moved in the left-right direction.

請求項5記載の発明によれば、作動軸を、左右方向に安定して移動させるうるとともに、係合部が被係合部と係合した状態で、座体に前後方向の強い力が加わっても、作動軸や係合部が変形したりする恐れは小さい。   According to the fifth aspect of the invention, the operating shaft can be stably moved in the left-right direction, and a strong force in the front-rear direction is applied to the seat body in a state where the engaging portion is engaged with the engaged portion. However, there is little risk that the operating shaft and the engaging portion will be deformed.

請求項6記載の発明によれば、作動軸に連係された操作レバーが妄りに非操作位置から座体のロック解除方向に回動するのを防止しうるとともに、作動軸は、常時被係合部と係合する方向に付勢されているので、係合部と被係合部との係合が解除された状態で、操作レバーから手を離すと、係合部は再度被係合部に自動的に係合するようになる。   According to the sixth aspect of the present invention, it is possible to prevent the operating lever linked to the operating shaft from rotating unintentionally from the non-operating position in the unlocking direction of the seat body, and the operating shaft is always engaged. When the hand is released from the operation lever in a state where the engagement between the engagement portion and the engaged portion is released, the engagement portion is again engaged. Will automatically engage.

請求項7記載の発明によれば、簡単な構成のガイド手段により、座体を、座支持フレームに沿って前後に安定して移動させることができる。   According to the seventh aspect of the present invention, the seat body can be stably moved back and forth along the seat support frame by the guide means having a simple configuration.

請求項8記載の発明によれば、操作レバーを通常操作と反対方向に回動させて、座体を、取付具の拡径頭部が長孔の挿通孔に位置するまで移動させることにより、座体を座支持フレームから取外すことができるので、脚体の上部にリクライニング機構等が設けられている椅子において、そのメンテナンス等を容易に行うことができる。   According to the invention of claim 8, by rotating the operation lever in the direction opposite to the normal operation, the seat body is moved until the enlarged diameter head portion of the fixture is located in the insertion hole of the long hole, Since the seat body can be removed from the seat support frame, maintenance and the like can be easily performed in a chair provided with a reclining mechanism or the like on the upper portion of the leg body.

以下、本発明の実施形態を、図面に基づいて説明する。
図1は、本発明の座体の前後位置調節装置を備える椅子の正面図、図2は、同じく側面図で、椅子の脚体(1)は、先端にキャスタ(2)が取付けられた放射方向を向く複数(5本)のベース脚杆(3)と、それらの中心より起立する回転自在な脚柱(4)と、この脚柱(4)の上端に後端部が固着された支基(5)とを備えている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a chair provided with a seat body front / rear position adjustment device of the present invention, FIG. 2 is a side view of the chair, and the leg (1) of the chair is a radiation having a caster (2) attached to the tip. A plurality of (5) base leg rods (3) facing the direction, a rotatable pedestal (4) standing up from the center thereof, and a support having a rear end fixed to the upper end of the pedestal (4) And (5).

(6)は、背凭れ支持フレームで、下端に斜め後ろ上方に傾斜する前向腕部(7a)を有する左右1対の側部フレーム(7)と、その上端同士を結合している後向凸円弧状の上部フレーム(8)とからなり、全体形は、前後面視ほぼ縦長下向コ字状をなしている。   (6) is a back support frame, a pair of left and right side frames (7) having a forward arm portion (7a) inclined obliquely rearward and upward at the lower end, and a rearward side connecting the upper ends thereof. Consists of a convex arc-shaped upper frame (8), and the overall shape is substantially vertically long and U-shaped when viewed from the front and back.

背凭れ支持フレーム(6)の下端、すなわち左右の前向腕部(7a)の前下端に連設された内向折曲部(7b)(7b)の内端部は、支基(5)内に設けられた、例えば公知のゴムトーションユニット等のリクライニング機構における左右方向を向くトーション軸(いずれも図示略)に、常時側面視反時計回りに付勢された状態で連結されている。これにより、背凭れ支持フレーム(6)とその前面に取付けられた背凭れ(9)は、支基(5)を中心として後傾しうるようになっている。   The inner ends of the inwardly bent portions (7b) and (7b) connected to the lower ends of the backrest support frame (6), that is, the front and lower ends of the left and right forward arms (7a) are located inside the support base (5). Is connected to a torsion shaft (both not shown in the figure) facing in the left-right direction in a reclining mechanism such as a known rubber torsion unit, which is always urged counterclockwise in a side view. As a result, the backrest support frame (6) and the backrest (9) attached to the front surface of the backrest support frame (6) can be tilted rearward about the support base (5).

支基(5)の前端の両側部に連設された、外側方に突出する軸状支持部(10)(10)の外側端には、斜め外上方を向く左右1対の座支持リンク(11)(11)の下端が、左右方向を向く枢軸(12)により、前後に回動可能に枢着されている。   A pair of left and right seat support links facing diagonally outward and upward are provided on the outer ends of the shaft-like support portions (10) and (10) projecting outwardly, which are connected to both sides of the front end of the support base (5). 11) The lower end of (11) is pivotally attached to the front and rear by a pivot (12) facing in the left-right direction.

背凭れ支持フレーム(6)における左右の前向腕部(7b)の前端部上面には、左右1対(一方のみ図示する)の座支持片(13)が上向きに突設されている。   On the upper surface of the front end portion of the left and right forward arms (7b) in the backrest support frame (6), a pair of left and right (only one is shown) seat support pieces (13) project upward.

左右の座支持リンク(11)と座支持片(13)の上端には、図3に示すような、平面視後向コ字形をなす、アルミニウム合金又は硬質合成樹脂製の座支持フレーム(14)が、枢着されている。すなわち、左右の座支持リンク(11)には、座支持フレーム(14)の前端の左右方向を向く前部フレーム(14a)の左右両側部に形成された枢着部(15)(15)が、また後部側の座支持片(13)には、座支持フレーム(14)における左右1対の前後方向を向く側部フレーム(14b)(14b)の後端部の内側部に形成された枢着部(16)(16)が、それぞれ左右方向を向く枢軸(17)(17)により枢着されている(図2参照)。   At the upper ends of the left and right seat support links (11) and the seat support piece (13), as shown in FIG. 3, a seat support frame (14) made of aluminum alloy or hard synthetic resin having a backward U-shape in plan view. Is pivotally attached. That is, the left and right seat support links (11) have pivoting portions (15) and (15) formed on the left and right sides of the front frame (14a) facing the left and right direction of the front end of the seat support frame (14). The seat support piece (13) on the rear side has a pivot formed on the inner side of the rear end of the side frames (14b) (14b) facing the pair of left and right sides of the seat support frame (14). The landing portions (16) and (16) are pivotally attached by pivots (17) and (17) respectively pointing in the left-right direction (see FIG. 2).

これにより、背凭れ支持フレーム(6)を背凭れ(9)と共に後傾させると、それと連動して、座支持フレーム(14)とそれにより支持された座体(18)が、後方に傾動させられるようになる。
座体(18)は、クッション体(19)と、スライドフレーム(20)とを備えている。
Accordingly, when the backrest support frame (6) is tilted backward together with the backrest (9), the seat support frame (14) and the seat body (18) supported thereby are tilted backward in conjunction with it. Be able to.
The seat body (18) includes a cushion body (19) and a slide frame (20).

スライドフレーム(20)は、図3に示すように、アルミニウム合金又は硬質合成樹脂等により平面視H字状に形成され、その前後方向を向く左右1対のスライド板(20a)(20a)の前後両端部が、下方より挿入したボルト(21)により、クッション体(19)の下面に取付けた座シェル(図示略)の両側部下面に固着されている。   As shown in FIG. 3, the slide frame (20) is formed in an H shape in plan view with an aluminum alloy or a hard synthetic resin, and the front and rear of a pair of left and right slide plates (20a) (20a) facing in the front-rear direction. Both end portions are fixed to lower surfaces of both side portions of a seat shell (not shown) attached to the lower surface of the cushion body (19) by bolts (21) inserted from below.

座支持フレーム(14)の上面には、スライドフレーム(20)が、次のようにして前後に摺動可能に取付けられている。   A slide frame (20) is attached to the upper surface of the seat support frame (14) so as to be slidable back and forth as follows.

図3に示すように、スライドフレーム(20)の左右のスライド板(20a)は、左右寸法が、座支持フレーム(14)の左右の側部フレーム(14b)の上面の左右寸法とほぼ等しく、かつ前後寸法が、側部フレーム(14b)よりも所要寸法長寸とされ、それらの前後部には、図6及び図7にも示すように、上半部の左右幅を下半部よりも大とすることにより、上下方向の中間部に段差面(22)を有するガイド長孔(23)(23)が、前後方向に向かって貫設されている。   As shown in FIG. 3, the left and right slide plates (20a) of the slide frame (20) have substantially the same lateral dimensions as the lateral dimensions of the upper surfaces of the left and right side frames (14b) of the seat support frame (14). In addition, the front and rear dimensions are longer than the side frame (14b) as required, and the front and rear parts have a left and right width of the upper half part as compared to the lower half part as shown in FIGS. By making it large, guide long holes (23) and (23) each having a step surface (22) in the middle portion in the vertical direction are provided so as to penetrate in the front-rear direction.

各ガイド長孔(23)の後端部には、その上半部の左右幅よりも大きな挿通孔(24)が、ガイド長孔(23)と連続するようにして上下に貫設されている。   At the rear end of each guide slot (23), an insertion hole (24) larger than the left and right width of the upper half of the guide slot (23) is vertically penetrated so as to be continuous with the guide slot (23). .

各ガイド長孔(23)には、摩擦抵抗の小さな硬質合成樹脂、例えばポリアセタールよりなる円形の取付具(25)が、その上半部の拡径鍔部(25a)の下面が段差面(22)と当接するようにして遊嵌されている。   Each guide slot (23) has a circular fitting (25) made of a hard synthetic resin having a low frictional resistance, for example, polyacetal, and the lower surface of the enlarged diameter flange portion (25a) of the upper half is a stepped surface (22 ).

座支持フレーム(14)にスライドフレーム(20)を取付けるには、それらの側部フレーム(14b)とスライド板(20a)との対向面間に、摩擦抵抗の小さなポリアセタール等よりなる薄肉のスライドシート(26)を挟入したのち、各取付具(25)に形成された段付孔(25b)の下半部に、円筒形のスペーサ(27)を嵌合し、かつこのスペーサ(27)に挿通したボルト(28)を、スライドシート(26)の通孔(26a)を挿通して、側部フレーム(14b)の上面のめねじ孔(29)に螺合する。   To attach the slide frame (20) to the seat support frame (14), a thin slide sheet made of polyacetal or the like having a low frictional resistance is provided between the opposed surfaces of the side frames (14b) and the slide plate (20a). After inserting (26), a cylindrical spacer (27) is fitted into the lower half of the stepped hole (25b) formed in each fixture (25), and this spacer (27) The inserted bolt (28) is inserted through the through hole (26a) of the slide sheet (26) and screwed into the female screw hole (29) on the upper surface of the side frame (14b).

これにより、スライドフレーム(20)及びそれに取付けられた座体(18)は、座支持フレーム(14)に、スライドシート(26)の上面上を前後に摺動するように取付けられ、この際、取付具(25)も、ガイド長孔(23)内を前後方向に相対移動する。なお、取付具(25)は、ガイド長孔(23)に沿って後限まで相対移動すると、挿通孔(24)を通して抜き外せるようになっている。   Thus, the slide frame (20) and the seat body (18) attached thereto are attached to the seat support frame (14) so as to slide back and forth on the upper surface of the slide seat (26). The fixture (25) also relatively moves in the longitudinal direction in the guide slot (23). The fixture (25) can be removed through the insertion hole (24) when it is relatively moved along the guide long hole (23) to the rear limit.

座支持フレーム(14)における正面視右方の側部フレーム(14b)の中間部の内側部には、図3、図8及び図10に示すように、上方と内方に開放された正面視逆L字状の凹部(30)が形成され、この凹部(30)には、座体(18)の前後位置調節手段である硬質合成樹脂よりなる位置調節部材(31)が、その上面と側部フレーム(14b)との上面が同一面をなすようにして、前後2本のボルト(32)により固着されている。   As shown in FIGS. 3, 8, and 10, the seat support frame (14) has an inner portion of the middle portion of the side frame (14 b) on the right side as viewed from the front. An inverted L-shaped concave portion (30) is formed, and in this concave portion (30), a position adjusting member (31) made of a hard synthetic resin as a front and rear position adjusting means of the seat body (18) is provided on the upper surface and the side thereof. The upper surface of the part frame (14b) is fixed by two front and rear bolts (32) so that they are flush with each other.

位置調節部材(31)の上下方向の中央部には、左右両方向に開口する長孔(33)が、前後方向に所要の長さに亘って形成され、その内側部側は、図10に示すような位置調節用長孔(34)となっている。この位置調節用長孔(34)には、その上下の対向面を波形状の凹凸面とすることにより、対向面間の寸法の小さな狭窄部(35a)(35a)間に、それよりも対向面間の寸法の大きな被係合部(35b)が、前後方向に複数形成されている。なお、長孔(33)及び位置調節用長孔(34)の前後寸法は、上記スライド板(20a)のガイド長孔(23)より所要寸法小としてある。   A long hole (33) that opens in both the left and right directions is formed in the center in the vertical direction of the position adjusting member (31) over a required length in the front-rear direction, and the inner side is shown in FIG. Such a position adjusting slot (34) is formed. In this position adjusting slot (34), the upper and lower opposing surfaces are corrugated irregular surfaces, so that the narrowed portions (35a) (35a) with smaller dimensions between the opposing surfaces are opposed to each other. A plurality of engaged portions (35b) having a large dimension between the surfaces are formed in the front-rear direction. The longitudinal dimension of the elongated hole (33) and the position adjusting elongated hole (34) is smaller than the required dimension of the elongated guide hole (23) of the slide plate (20a).

図3において、(36)は操作レバー装置で、合成樹脂製の操作レバー(37)と、金属製の作動軸(38)と、それらを取付ける合成樹脂製の取付部材(39)とを備えている。   In FIG. 3, (36) is an operating lever device, which comprises an operating lever (37) made of synthetic resin, an operating shaft (38) made of metal, and a mounting member (39) made of synthetic resin for attaching them. Yes.

操作レバー(37)は、図4及び図8にも示すように、左右方向の中間部がなだらかな山形をなし、かつ外側端に、やや下向き傾斜の前方を向く把手部(37a)を備える平板状に形成され、その内側端には、若干内側方に傾斜する下向き二股フォーク状の作動片(37b)(37b)が、一体的に連設されている。   As shown in FIGS. 4 and 8, the operation lever (37) is a flat plate having a gentle mountain shape in the middle in the left-right direction and a handle portion (37a) facing the front of the slightly downward slope at the outer end. A downwardly bifurcated fork-like working piece (37b) (37b) that is slightly inwardly inclined is integrally connected to the inner end thereof.

操作レバー(37)は、その山形をなす頂部に挿通した前後方向を向く枢支軸(40)を、取付部材(39)の取付部である水平片(41)に連設された前後1対の起立片(42)(42)に嵌合することにより、起立片(42)間において上下に回動しうるように枢着されている。また、操作レバー(37)は、その枢着部よりも外方の上面に形成した係止溝(43)に、ねじりばね(44)の一方の足片を係止するとともに、他方の足片を水平片(41)の上面に圧接させることにより、把手部(37a)を含む枢着部の外側方が常時下向きに付勢されている。   The control lever (37) has a pair of front and rear connected to the horizontal piece (41), which is the mounting portion of the mounting member (39), with the pivot shaft (40) facing the front and rear inserted through the top of the mountain. By being fitted to the upright pieces (42) and (42), the upright pieces (42) are pivoted so as to be able to turn up and down. In addition, the operating lever (37) locks one foot piece of the torsion spring (44) in a locking groove (43) formed on the upper surface outside the pivoted portion, and the other foot piece. Is pressed against the upper surface of the horizontal piece (41), so that the outer side of the pivot attachment portion including the handle portion (37a) is always urged downward.

取付部材(39)における水平片(41)の内側端の中央部には、水平片(41)よりも下方において左右方向内向きのガイド筒(45)が、一体的に連設されている。ガイド筒(45)の左右方向の中間部には、上方及び前後両方向に開口する切欠き(46)が形成されている。   A guide cylinder (45) inward in the left-right direction is integrally provided below the horizontal piece (41) at the center of the inner end of the horizontal piece (41) in the mounting member (39). A notch (46) is formed in the middle portion in the left-right direction of the guide tube (45).

上述した作動軸(38)は、図3及び図8に示すように、内側端部に拡径頭部(47)を有するとともに、外側端部には、上記位置調節用長孔(34)の被係合部(35b)に挿脱可能で、狭窄部(35a)は挿通不能な直径の短寸の係合軸(48)と、それよりも小径で、かつ狭窄部(35a)を前後方向に通過可能な直径の小径軸(49)とが連設され、全体の長さは、ガイド筒(45)の左右寸法とほぼ等長とされている。   As shown in FIGS. 3 and 8, the operating shaft (38) described above has an enlarged head (47) at the inner end, and the position adjusting long hole (34) at the outer end. The constricted portion (35a) can be inserted into and removed from the engaged portion (35b), and the narrowed portion (35a) has a short engagement shaft (48) with a diameter that cannot be inserted. A small-diameter shaft (49) having a diameter that can pass through the guide cylinder (49) is continuously provided, and the overall length is substantially equal to the left-right dimension of the guide tube (45).

作動軸(38)の外側端部は、ガイド筒(45)における切欠き(46)よりも外方の外側ガイド筒(45a)内に、左右方向に摺動可能に嵌合され、また、同じく拡径頭部(47)は、切欠き(46)よりも内方の、内径が外側ガイド筒(45a)より大径とされた内側ガイド筒(45b)内に、圧縮コイルばね(50)を介在させて摺動可能に嵌合されている。圧縮コイルばね(50)は、内側ガイド筒(45b)内において、その側端に形成された内向係止部(51)と、拡径頭部(47)の外側端(右側端)との間に縮設され、これにより、作動軸(38)全体は、常時左右方向内向きに付勢されている。   The outer end of the operating shaft (38) is slidably fitted in the left and right direction in the outer guide tube (45a) outside the notch (46) in the guide tube (45). The enlarged head (47) has a compression coil spring (50) placed in an inner guide cylinder (45b) whose inner diameter is larger than that of the outer guide cylinder (45a). It is slidably fitted with interposition. The compression coil spring (50) is located in the inner guide tube (45b) between the inward locking portion (51) formed at the side end thereof and the outer end (right end) of the enlarged head portion (47). Thus, the entire operation shaft (38) is always urged inward in the left-right direction.

なお、圧縮コイルばね(50)は、作動軸(38)に連係されている操作レバー(37)の把持部(37a)も下向きに常時付勢することができるため、操作レバー(37)を下向きに付勢するねじりばね(44)は省略することもある。   Note that the compression coil spring (50) can always bias the gripping portion (37a) of the operating lever (37) linked to the operating shaft (38) downward, so that the operating lever (37) faces downward. The torsion spring (44) for biasing may be omitted.

操作レバー(37)は、その二股フォーク状の作動片(37b)(37b)が、ガイド筒(45)の切欠き(46)部を上方より跨ぐようにして枢着され、両作動片(37b)と作動軸(38)とは、図8に示すように、作動軸(38)の左右方向中間部の中央部に圧入した前後方向を向く連係ピン(52)の前後の突出端部に、両作動片(37b)の対向面に形成された、下方と対向面側に開口する上下方向を向く長溝(53)を上方より嵌合することにより、互いに連係されている。   The operating lever (37) is pivotally mounted so that its fork-shaped operating piece (37b) (37b) straddles the notch (46) of the guide tube (45) from above, and both operating pieces (37b ) And the operating shaft (38), as shown in FIG. 8, at the projecting end portions of the front and rear of the linkage pin (52) facing in the front-rear direction press-fitted into the central portion of the middle portion of the operating shaft (38) A long groove (53) formed on the opposing surfaces of both the operating pieces (37b) and facing upward and downward and opening in the opposing surface side is engaged with each other by fitting from above.

図4は、上記のように各部材を組付けてユニット化された操作レバー装置(36)を示すもので、この操作レバー装置(36)は、スライドフレーム(20)の右側端部に、次のようにして取付けられている。   FIG. 4 shows an operation lever device (36) unitized by assembling each member as described above. This operation lever device (36) is placed next to the right end of the slide frame (20). It is installed like this.

図3に示すように、スライドフレーム(20)における両スライド板(20a)の対向面の中央部に連設された横フレーム(20b)の右端部には、上方及び中間部が下方に開口するとともに、操作レバー(37)の両作動片(37b)が左右方向に移動しうる大きさの凹部(54)が、横フレーム(20b)の上面よりも下方に位置するように形成され、この凹部(54)に、まず操作レバー装置(36)のガイド筒(45)を、それに作動軸(38)全体を嵌合した状態で、斜め外上方より挿入して保持する。   As shown in FIG. 3, the upper and middle portions open downward at the right end of the horizontal frame (20 b) connected to the center of the opposing surfaces of both slide plates (20 a) in the slide frame (20). In addition, a recess (54) large enough to move both operating pieces (37b) of the operating lever (37) in the left-right direction is formed below the upper surface of the horizontal frame (20b). (54) First, the guide cylinder (45) of the operating lever device (36) is inserted and held obliquely from above and with the entire operating shaft (38) fitted thereto.

ついで、取付部材(39)の水平片(41)を、右方のスライド板(20a)の上面中央に、前後1対の起立片(55)(55)により位置決めした状態で、上方より2本のボルト(56)をもって固定する。   Next, with the horizontal piece (41) of the mounting member (39) positioned at the center of the upper surface of the right slide plate (20a) by a pair of front and rear standing pieces (55) and (55), two pieces from above are provided. Secure with the bolt (56).

ついで、作動軸(38)の係合軸(48)と小径軸(49)を、外側ガイド筒(45a)の外側方に突出させ、位置調節部材(31)の長孔(33)に内方より嵌合させる。   Next, the engagement shaft (48) and the small-diameter shaft (49) of the operating shaft (38) are projected outward from the outer guide tube (45a), and inwardly inserted into the long hole (33) of the position adjusting member (31). Fit more.

最後に、図3及び図8に示すように、右方のスライド板(20a)における外側端部中央の上下両面に設けた前後方向を向く凹溝(57)(57)に、正面視コ字状をなす当接部材(58)における内側端の対向面に突設された突条(58a)(58a)を、前後方向にスライド可能に嵌合し、当接部材(58)の上面に、操作レバー(37)の枢着部よりも外側の下面を当接させる。   Finally, as shown in FIG. 3 and FIG. 8, front-recessed concave grooves (57) and (57) provided on the upper and lower surfaces at the center of the outer end of the right slide plate (20a) Ridges (58a) (58a) projecting on the opposing surface of the inner end of the contact member (58) having a shape, are slidably fitted in the front-rear direction, and on the upper surface of the contact member (58), The lower surface outside the pivot part of the operation lever (37) is brought into contact.

なお、当接部材(58)を例えば後限までスライドさせたとき、操作レバー(37)の回動領域から外れ、当接部材(58)の上面に操作レバー(37)の下面が当接しないようにしてある。   For example, when the contact member (58) is slid to the last limit, the operation lever (37) is out of the rotation region, and the lower surface of the operation lever (37) does not contact the upper surface of the contact member (58). It is like that.

図8及び図10は、操作レバー装置(36)の取付終了時を示すもので、この状態では、作動軸(38)の係合軸(48)が、位置調節用長孔(34)の前後いずれかの被係合部(35b)に嵌合されて、その前後の狭窄部(35a)により、前後方向に移動するのが阻止されるようになっている。従って、座支持フレーム(14)に前後に摺動可能に取付けられているスライドフレーム(20)及びこれに取付けられている座体(18)の前後方向への移動もロックされる。   FIGS. 8 and 10 show the end of the mounting of the operating lever device (36). In this state, the engagement shaft (48) of the operating shaft (38) is positioned before and after the long hole for position adjustment (34). It is fitted to one of the engaged portions (35b) and is prevented from moving in the front-rear direction by the front and rear narrow portions (35a). Accordingly, the movement of the slide frame (20) attached to the seat support frame (14) so as to be slidable back and forth and the seat body (18) attached thereto is also locked.

座体(18)の前後位置を調節するには、図9に示すように、操作レバー(37)の把手部(37a)を手で持って引き上げる。すると、作動片(37b)に連係されている作動軸(38)が、圧縮コイルばね(50)に抗して外側方に移動させられ、係合軸(48)が、位置調節用長孔(34)の被係合部(35b)より離脱して、外方の長孔(33)に位置するとともに、小径軸(49)が位置調節用長孔(34)内に突入して、被係合部(35b)と対向することにより、図11に示すように、小径軸(49)は、狭窄部(35a)に拘束されることなく、前後方向に自由に移動可能となる。   In order to adjust the front-rear position of the seat body (18), as shown in FIG. 9, the handle part (37a) of the operating lever (37) is held up by hand and pulled up. Then, the operating shaft (38) linked to the operating piece (37b) is moved outward against the compression coil spring (50), and the engaging shaft (48) is moved to the position adjusting slot ( 34) is disengaged from the engaged portion (35b) and positioned in the outer long hole (33), and the small-diameter shaft (49) enters the position adjusting long hole (34) to engage the By facing the joint portion (35b), as shown in FIG. 11, the small-diameter shaft (49) can freely move in the front-rear direction without being constrained by the narrowed portion (35a).

これにより、座体(18)のロックが解除され、これを前後方向に任意の位置まで移動させて、把手部(37a)から手を離すと、作動軸(38)は、圧縮コイルばね(50)の付勢力により内側方に移動しようとするため、係合軸(48)が最寄りの被係合部(35b)に自動的に嵌合して係合し、かつ狭窄部(35a)により前後方向への移動が阻止されることにより、座体(18)は所望の前後位置に段階的に調節されてロックされる。   As a result, the lock of the seat body (18) is released, moved to an arbitrary position in the front-rear direction, and released from the handle portion (37a), the operating shaft (38) is moved to the compression coil spring (50 ), The engagement shaft (48) automatically engages and engages with the nearest engaged part (35b), and the narrowed part (35a) By blocking the movement in the direction, the seat body (18) is adjusted to the desired front-rear position and locked in stages.

図12及び図13に示すように、当接部材(58)を、操作レバー(37)と干渉しない後限までスライドさせて、操作レバー(37)を、スライド板(20a)の上面と当接するまで下向きに回動すると、作動軸(38)が内側方(左方)に移動させられることにより、その外側端部の係合軸(48)が、位置調節用長孔(34)から離脱し、座体(18)は、スライド板(20a)に形成したガイド長孔(23)の範囲内で前後方向に自在に移動可能となる。   As shown in FIG. 12 and FIG. 13, the contact member (58) is slid to the last limit that does not interfere with the operation lever (37), and the operation lever (37) contacts the upper surface of the slide plate (20a). When the operating shaft (38) is moved inward (leftward), the engaging shaft (48) at the outer end thereof is disengaged from the long hole for position adjustment (34). The seat body (18) can freely move in the front-rear direction within the range of the guide slot (23) formed in the slide plate (20a).

従って、図14に示すように、座体(18)を前限まで移動すると、図7の2点鎖線で示すように、取付具(25)がガイド長孔(23)の後部の挿通孔(24)まで相対的に移動することにより、取付具(25)を挿通孔(24)より抜き外すことが可能となる。これにより、スライドフレーム(20)を含む座体(18)を座支持フレーム(14)から取外すことができ、支基(5)に組込まれたリクライニング機構のメンテナンス等を容易に行うことができる。   Therefore, as shown in FIG. 14, when the seat body (18) is moved to the front limit, the fixture (25) is inserted into the rear insertion hole (23) of the guide long hole (23) as shown by a two-dot chain line in FIG. By moving relatively to 24), the fixture (25) can be removed from the insertion hole (24). As a result, the seat body (18) including the slide frame (20) can be removed from the seat support frame (14), and maintenance and the like of the reclining mechanism incorporated in the support base (5) can be easily performed.

以上説明したように、上記実施形態、すなわち位置調節部材(31)と、ユニット化された操作レバー装置(36)等とよりなる座体の前後位置調節装置においては、座支持フレーム(14)における側部フレーム(14b)の内側部に、前後複数の被係合部(35b)を有する位置調節部材(31)を設けるとともに、この位置調節部材(31)と対向する内方に、操作レバー(37)の上向き操作と連動して外側方に移動する作動軸(38)を、その外側部に設けた係合部としての係合軸(48)が常時被係合部(35b)のいずれかと係合して座体(18)の前後移動がロックされるように設け、かつ操作レバー(37)を操作したとき、係合軸(48)が外側方、すなわち位置調節部材(31)と接近する方向に移動して、その内方の小径軸(49)が被係合部(35b)内に突入することにより、座体(18)のロックが解除されるようになっているため、位置調節部材(31)と作動軸(38)とを近接させて設けることができる。   As described above, in the above-described embodiment, that is, the front / rear position adjusting device for the seat body including the position adjusting member (31) and the unitized operation lever device (36), the seat support frame (14) A position adjustment member (31) having a plurality of front and rear engaged portions (35b) is provided on the inner side of the side frame (14b), and an operation lever (inward) facing the position adjustment member (31) is provided. 37) The operating shaft (38) that moves outward in conjunction with the upward operation, and the engaging shaft (48) as the engaging portion provided on the outer portion thereof is always one of the engaged portions (35b). When the lever (37) is operated, the engagement shaft (48) moves outward, that is, close to the position adjustment member (31). And the inner small-diameter shaft (49) enters the engaged portion (35b), so that the seat (18) is unlocked. Therefore, the position adjusting member (31) and the operating shaft (38) can be provided close to each other.

従って、前後位置調節装置全体の左右寸法も小さくなり、全体を小型化することができる。しかも、操作レバー(37)、作動軸(38)、圧縮コイルばね(50)等の各部材は、全て取付部材(39)に組付けられ、操作レバー装置(36)がユニット化されているので、それ自体の小型化も図れ、前後位置調節装置を、座体(18)の一側部にコンパクトに収めることができる。   Therefore, the left and right dimensions of the entire front-rear position adjusting device are also reduced, and the entire size can be reduced. Moreover, since the operation lever (37), the operating shaft (38), the compression coil spring (50), etc. are all assembled to the mounting member (39), the operation lever device (36) is unitized. In addition, the size of itself can be reduced, and the front / rear position adjusting device can be compactly accommodated on one side of the seat body (18).

また、作動軸(38)は、ガイド筒(45)により左右方向に摺動可能に保持され、かつガイド筒(45)も、スライドフレーム(20)に設けた凹部(54)に収容されて保持されているので、係合軸(48)が被係合部(35b)に係合した状態で、座体(18)に前後方向の強い力が加わっても、作動軸(38)が変形したりする恐れは小さい。   The operating shaft (38) is slidably held in the left-right direction by the guide tube (45), and the guide tube (45) is also housed and held in the recess (54) provided in the slide frame (20). Therefore, even if a strong force in the front-rear direction is applied to the seat body (18) with the engagement shaft (48) engaged with the engaged portion (35b), the operation shaft (38) is deformed. There is little fear of it.

さらに、位置調節部材(31)や、それに係合する作動軸(38)は、座支持フレーム(14)の内方に位置し、外部に露呈していないので、体裁が向上する。   Further, the position adjusting member (31) and the operating shaft (38) engaged therewith are located inside the seat support frame (14) and are not exposed to the outside, so that the appearance is improved.

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、操作レバー(37)の把手部(37a)を上向きに回動操作したとき、係合軸(48)が外側方に移動して被係合部(35b)より離脱して、座体(18)のロックが解除されるようにしているが、把手部(37a)を下向きに回動操作したとき、座体(18)のロックが解除されるようにすることもできる。
The present invention is not limited to the above embodiment.
In the above embodiment, when the handle portion (37a) of the operation lever (37) is turned upward, the engagement shaft (48) moves outward and is detached from the engaged portion (35b). Although the seat (18) is unlocked, the seat (18) can be unlocked when the handle (37a) is turned downward.

この際には、座支持フレーム(14)の内方に、位置調節部材(31)を取付可能な取付部を別途設けるとともに、作動軸(38)を左右反対向きとして、係合軸(48)や小径軸(49)を内端側に設け、操作レバー(37)をスライドフレーム(20)と当接しない上方の非操作位置から下向きに回動したとき、係合軸(48)が内側方に移動するようにすればよい。   At this time, an attachment portion to which the position adjustment member (31) can be attached is provided separately inside the seat support frame (14), and the operation shaft (38) is set in the opposite direction to the engagement shaft (48). When the operating lever (37) is turned downward from the upper non-operating position where it does not contact the slide frame (20), the engagement shaft (48) moves inward. Move to.

また、上記実施形態では、位置調節部材(31)に、被係合部(35b)を有する長孔(34)を設けているが、このような位置調節部材(31)を省略して、側部フレーム(14b)に、被係合部(35b)を有する長孔(34)を直接設けることもできる。   In the above embodiment, the position adjusting member (31) is provided with the long hole (34) having the engaged portion (35b). A long hole (34) having an engaged portion (35b) may be directly provided in the part frame (14b).

さらに、上記実施形態では、スライドフレーム(20)のスライド板(20a)側にガイド長孔(23)を設けているが、座支持フレーム(14)の側部フレーム(14b)にガイド長孔(23)を設け、その下方より、上記と同様の取付具(25)を挿入し、ボルト(28)によりスライド板(20a)の下面に固定するようにしてもよい。   Further, in the above embodiment, the guide long hole (23) is provided on the slide plate (20a) side of the slide frame (20), but the guide long hole (23b) is provided in the side frame (14b) of the seat support frame (14). 23) may be provided, and a fixture (25) similar to the above may be inserted from below, and fixed to the lower surface of the slide plate (20a) with a bolt (28).

本発明を適用した椅子の正面図である。It is a front view of the chair to which this invention is applied. 同じく側面図である。It is a side view similarly. 本発明の前後位置調節装置と、それが取付けられる座体との分解斜視図である。It is a disassembled perspective view of the front-back position adjustment apparatus of this invention, and the seat to which it is attached. ユニット化した操作レバー装置の斜視図である。It is a perspective view of the operation lever device unitized. 座体における前後位置調節装置取付部の拡大側面図である。It is an enlarged side view of the front-back position adjusting device attachment part in a seat. 図5のVI−VI線拡大縦断正面図である。It is the VI-VI line expansion vertical front view of FIG. 図6のVII−VII線縦断側面図である。It is a VII-VII line vertical side view of FIG. 図5のVIII−VIII線拡大縦断正面図である。It is the VIII-VIII line enlarged vertical front view of FIG. 同じく、操作レバーを上向きに回動操作したときの縦断正面図である。Similarly, it is a longitudinal front view when the operation lever is turned upward. 図8のX−X線縦断側面図である。It is the XX line vertical side view of FIG. 図9のXI−XI線縦断側面図である。FIG. 10 is a longitudinal side view taken along line XI-XI in FIG. 9. 当接部材を後方にスライドさせて、操作レバーを下向きに操作したときの座体の要部の側面図である。It is a side view of the principal part of a seat body when a contact member is slid back and an operation lever is operated downward. 図12のXIII−XIII線拡大縦断正面図である。It is the XIII-XIII line enlarged vertical front view of FIG. 座体を前方の取外し位置まで移動したときの側面図である。It is a side view when a seat is moved to the front removal position.

符号の説明Explanation of symbols

(1)脚体
(2)キャスタ
(3)ベース脚杆
(4)脚柱
(5)支基
(6)背凭れ支持フレーム
(7)側部フレーム
(7a)前向腕部
(7b)内向折曲部
(8)上部フレーム
(9)背凭れ
(10)軸状支持部
(11)座支持リンク
(12)枢軸
(13)座支持片
(14)座支持フレーム
(14a)前部フレーム
(14b)側部フレーム
(15)(16)枢着部
(17)枢軸
(18)座体
(19)クッション体
(20)スライドフレーム
(20a)スライド板
(20b)横フレーム
(21)ボルト
(22)段差面
(23)ガイド長孔
(24)挿通孔
(25)取付具
(25a)拡径鍔部
(25b)段付孔
(26)スライドシート
(26a)通孔
(27)スペーサ
(28)ボルト
(29)めねじ孔
(30)凹部
(31)位置調節部材
(32)ボルト
(33)長孔
(34)位置調節用長孔
(35a)狭窄部
(35b)被係合部
(36)操作レバー装置
(37)操作レバー
(37a)把手部
(37b)作動片
(38)作動軸
(39)取付部材
(40)枢支軸
(41)水平片
(42)起立片
(43)係止溝
(44)ねじりばね
(45)ガイド筒
(45a)外側ガイド筒
(45b)内側ガイド筒
(46)切欠き
(47)拡径頭部
(48)係合軸(係合部)
(49)小径軸(小径部)
(50)圧縮コイルばね(付勢手段)
(51)内向係止部
(52)連係ピン
(53)長溝
(54)凹部
(55)起立片
(56)ボルト
(57)凹溝
(58)当接部材
(58a)突条
(1) Leg
(2) Casters
(3) Base legs
(4) pedestal
(5) Support base
(6) Back support frame
(7) Side frame
(7a) Forward arm
(7b) Inward bending
(8) Upper frame
(9) Backrest
(10) Shaft support
(11) Seat support link
(12) Axis
(13) Seat support piece
(14) Seat support frame
(14a) Front frame
(14b) Side frame
(15) (16) Pivot
(17) Axis
(18) Seat
(19) Cushion body
(20) Slide frame
(20a) Slide plate
(20b) Horizontal frame
(21) Bolt
(22) Step surface
(23) Guide slot
(24) Insertion hole
(25) Mounting tool
(25a) Expanded collar
(25b) Stepped hole
(26) Slide sheet
(26a) Through hole
(27) Spacer
(28) Bolt
(29) Female thread hole
(30) Recess
(31) Position adjustment member
(32) Bolt
(33) Long hole
(34) Position adjustment slot
(35a) Stenosis
(35b) Engaged part
(36) Control lever device
(37) Control lever
(37a) Handle part
(37b) Actuator
(38) Actuating shaft
(39) Mounting member
(40) Pivot shaft
(41) Horizontal piece
(42) Standing piece
(43) Locking groove
(44) Torsion spring
(45) Guide tube
(45a) Outer guide tube
(45b) Inner guide tube
(46) Notch
(47) Expanded head
(48) Engagement shaft (engagement part)
(49) Small diameter shaft (small diameter part)
(50) Compression coil spring (biasing means)
(51) Inward locking part
(52) Linking pin
(53) Long groove
(54) Recess
(55) Standing piece
(56) Bolt
(57) Groove
(58) Contact member
(58a) ridge

Claims (8)

脚体に設けた座支持フレームにより、座体を、ガイド手段をもって前後に移動可能に支持し、前記座支持フレームに設けた前後複数の被係合部に、前記座体に設けた操作レバーに連係された係合部を選択的に係合させることにより、座体の前後位置を段階的に調節しうるようにした椅子における座体の前後位置調節装置において、
前記被係合部を、前記座支持フレームに形成した左右両方向に開口する前後方向を向く長孔の対向面に設け、前後方向を向く軸回りに回動しうるようにした前記操作レバーに、左右方向を向く作動軸を、操作レバーの回動操作により前記長孔と直交する方向に移動しうるように連係し、この作動軸の先端に、前記係合部を、前記被係合部と常時係合するように設け、かつ係合部よりも基端寄りの作動軸に、前記被係合部を前後方向に通過可能な、前記係合部よりも小径をなす小径部を設け、前記操作レバーの回動操作時に前記小径部が被係合部と対向する位置に移動することにより、係合部と被係合部との係合が解除されるようにしたことを特徴とする椅子における座体の前後位置調節装置。
A seat support frame provided on the leg body supports the seat body so as to be movable back and forth with a guide means, and a plurality of engaged portions provided on the seat support frame are connected to an operation lever provided on the seat body. In the seat front / rear position adjustment device for a chair that can adjust the front / rear position of the seat stepwise by selectively engaging the linked engaging portions,
The engaging lever is provided on a facing surface of a long hole facing the front-rear direction that opens in both the left and right directions formed in the seat support frame, and the operation lever that can rotate about an axis facing the front-rear direction, A working shaft that faces in the left-right direction is linked so that it can be moved in a direction perpendicular to the long hole by rotating the operation lever, and the engaging portion is connected to the engaged portion at the tip of the working shaft. Provided to be always engaged, and provided on the operating shaft closer to the base end than the engaging portion is provided with a small-diameter portion having a smaller diameter than the engaging portion, which can pass through the engaged portion in the front-rear direction, A chair characterized in that the engagement between the engaging portion and the engaged portion is released by moving the small diameter portion to a position facing the engaged portion when the operation lever is rotated. Device for adjusting the position of the front and rear of the seat.
長孔の対向面に、小径軸が前後方向に通過可能な狭窄部を、所定間隔おきに複数形成し、互いに隣接する狭窄部間を、係合部が係脱する被係合部としてなる請求項1記載の椅子における座体の前後位置調節装置。   A plurality of constrictions that allow a small-diameter shaft to pass in the front-rear direction are formed on the opposed surfaces of the long holes at predetermined intervals, and the constricted portions adjacent to each other serve as engaged portions for engaging and disengaging the engaging portions. The front-back position adjustment apparatus of the seat in the chair of claim | item 1. 座支持フレームが、左右1対の側部フレームを備える一方、座体の下面に、前記両側部フレーム上を前後に摺動する左右1対のスライド板を備えるスライドフレームを設け、前記一方の側部フレームの内側面に、被係合部を有する長孔を設けるとともに、前記側部フレームと対向する前記一方のスライド板に、操作レバーと、作動軸とを、操作レバーの上向き回動操作時に、係合部が座体の内方より外側方に移動して、長孔の被係合部より離脱するように設けてなる請求項1または2記載の椅子における座体の前後位置調節装置。   The seat support frame includes a pair of left and right side frames, and a slide frame including a pair of left and right slide plates that slide back and forth on the both side frames is provided on the lower surface of the seat body. A long hole having an engaged portion is provided on the inner side surface of the part frame, and an operation lever and an operating shaft are provided on the one slide plate facing the side frame when the operation lever is turned upward. The seat front / rear position adjustment device for a chair according to claim 1, wherein the engaging portion is provided so as to move outward from the inside of the seat body and to be detached from the engaged portion of the elongated hole. 操作レバーの把手部と反対側の端部に、作動軸に上方より跨嵌する二股状の作動片を連設し、この作動片と作動軸とを前後方向を向くピンにより連動可能に連結してなる請求項1〜3のいずれかに記載の椅子における座体の前後位置調節装置。   A bifurcated working piece straddling the operating shaft from above is connected to the end of the operating lever opposite to the handle, and the working piece and the working shaft are connected to each other by a pin that faces in the front-rear direction. The front-and-rear position adjusting device for the seat in the chair according to any one of claims 1 to 3. 作動軸を、座体に設けたガイド筒により摺動可能に保持してなる請求項1〜4のいずれかに記載の椅子における座体の前後位置調節装置。   5. The seat front / rear position adjusting device for a chair according to claim 1, wherein the operating shaft is slidably held by a guide tube provided on the seat. 作動軸を、その係合部が被係合部と係合する方向に常時付勢する付勢手段を設けてなる請求項1〜5のいずれかに記載の椅子における座体の前後位置調節装置。   6. A front / rear position adjustment device for a seat body in a chair according to claim 1, further comprising an urging means for constantly urging the operating shaft in a direction in which the engaging portion engages with the engaged portion. . ガイド手段が、座体と座支持フレームとの対向面のいずれか一方に設けられた左右1対の前後方向を向くガイド長孔と、このガイド長孔を挿通して前記座体と座支持フレームとの他方の対向面に固定され、かつ上下いずれか一方の端部に、前記ガイド長孔の左右幅よりも大きい拡径頭部を有する取付具とを備えるものとした請求項1〜6のいずれかに記載の椅子における座体の前後位置調節装置。   The guide means has a pair of left and right guide elongated holes provided on either one of the opposing surfaces of the seat body and the seat support frame, and the seat body and the seat support frame inserted through the guide slot. And a fixture having an enlarged head having a larger diameter than the lateral width of the guide slot at either one of the upper and lower ends. The seat body front-rear position adjusting device in any one of the chairs. ガイド長孔の前後いずれか一方の端部に、取付具の拡径頭部が挿通可能な大径の挿通孔を、ガイド長孔と連続させて設けるととともに、座体に、操作レバーが非操作位置で当接する当接部材を、前後方向に移動可能に設け、この当接部材を、操作レバーの回動領域から外れる位置まで移動させて、該操作レバーを通常の操作と反対方向に回動操作することにより、被係合部が設けられている長孔に突入している係合部を該長孔より離脱させ、座体を、前記取付具の拡径頭部が挿通孔に位置するまで前後方向に移動しうるようにした請求項7記載の椅子における座体の前後位置調節装置。
A large-diameter insertion hole through which the diameter-enlarged head of the fixture can be inserted is provided at one of the front and rear ends of the guide long hole, and the control lever is not attached to the seat. An abutting member that abuts at the operating position is provided so as to be movable in the front-rear direction. The abutting member is moved to a position that is out of the rotation region of the operating lever, and the operating lever is rotated in the opposite direction to the normal operation. By moving, the engaging part protruding into the long hole in which the engaged part is provided is disengaged from the long hole, and the enlarged head of the fixture is positioned in the insertion hole. The seat front / rear position adjustment device for a chair according to claim 7, wherein the seat body can be moved in the front / rear direction until such time.
JP2006194855A 2006-07-14 2006-07-14 Front / rear position adjustment device for seat body in chair Expired - Fee Related JP4908954B2 (en)

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