JP2010094363A

JP2010094363A - Chair

Info

Publication number: JP2010094363A
Application number: JP2008268796A
Authority: JP
Inventors: Hiroshi Masunaga; 浩益永
Original assignee: Okamura Corp
Current assignee: Okamura Corp
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2010-04-30

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair which permits a seat body to smoothly move forward and rearward with the seat body stably supported on a seat support, and is hardly in danger of forcibly causing a problem even if repeatedly subjected to a great load during use for a long time. <P>SOLUTION: The chair prevents the seat body 7 from moving rightward and leftward and supports it on the seat support 6 by providing a pair of right and left rails 13 facing from front to rear in the seat support 6 and a pair of right and left rail receiving portions 14 facing from front to rear in the underside of the seat body 7 correspondingly to the rail portions 13, by supporting the rail receiving portions 14 slidably on the rail portions 13, providing engagement pieces 16b on the outside portions or inside portions of the horizontal directions of both rail portions 13, and engagement grooves 21 on the outside portions or inside portions of the horizontal directions of both rail receiving portions 14, and by engaging the engagement pieces 16b with the engagement grooves 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、座体を、脚体の上部に設けた座支持体に対して前後方向に移動可能に組み付けるようにした椅子に関する。 The present invention relates to a chair in which a seat body is assembled so as to be movable in the front-rear direction with respect to a seat support provided on an upper portion of a leg.

この種の椅子としては、座体の最下部を、主として合成樹脂製の座板によって構成するとともに、この座板を、座支持体に嵌合して支持するという組付け構造がしばしば採用されており、特に、合成樹脂製からなる座体の易成型を利用して、座体に、座支持体と係合する爪部などを形成したものは、公知であり、多数の製品が開発されている。
また、座支持体に、前後方向を向く左右一対の側部フレームを形成し、この側部フレームに、側方を向くように爪部（係合片）を形成し、この係合片に座板を係合させることにより、座体を座支持体に組み付けるようにした椅子が公知である（特許文献１，２参照）。 As this type of chair, an assembly structure is often adopted in which the lowermost part of the seat body is mainly composed of a synthetic resin seat plate, and this seat plate is fitted to and supported by the seat support body. In particular, it is known that a claw portion that engages with a seat support is formed on the seat using easy molding of a seat made of synthetic resin, and many products have been developed. Yes.
In addition, a pair of left and right side frames facing in the front-rear direction are formed on the seat support, and a claw portion (engagement piece) is formed on the side frame so as to face sideways. A chair in which a seat is assembled to a seat support by engaging a plate is known (see Patent Documents 1 and 2).

しかし、特許文献１，２に記載された椅子は、座支持体の左右に設けた側部フレームの形状か、上向きコ字状となっているため、そのコ字状部の上向片を側方に向けて折曲することにより、前記係合片の加工が容易に行えるが、座体のほとんどの荷重が、側部フレームの係合片に加わり、互いの接触面積が小さな部分に応力が集中し易い。
また、座体を、側部フレーム上の前後方向に摺動可能とした場合に、その繰返し動作によって、座板が一層破損し易く、座体を、長期に亘って、座支持体に対して前後方向に円滑にかつ安定して移動させることができないという虞がある。
特開２００６−１０２１４６号公報特開２００８−１８３０７３号公報 However, since the chairs described in Patent Documents 1 and 2 have the shape of the side frame provided on the left and right sides of the seat support or the upward U-shape, the upward piece of the U-shaped portion is on the side. The engagement piece can be easily processed by bending it toward the side, but most of the load of the seat is applied to the engagement piece of the side frame, and stress is applied to the portion where the mutual contact area is small. Easy to concentrate.
In addition, when the seat body is slidable in the front-rear direction on the side frame, the seat plate is more easily damaged by the repeated operation, and the seat body can be supported with respect to the seat support body for a long time. There is a possibility that it cannot be moved smoothly and stably in the front-rear direction.
JP 2006-102146 A JP 2008-183073 A

本発明は、前記した現状に鑑み、座体を、座支持体に安定的に支持させた状態で、円滑に前後方向に移動しうるとともに、使用時の大きな荷重を、長期に亘って繰り返し受けても、強度的に問題が生じる虞の少ない椅子を提供することを目的とする。 In view of the above-described present situation, the present invention can smoothly move in the front-rear direction while the seat body is stably supported by the seat support body, and repeatedly receives a large load during use over a long period of time. However, an object is to provide a chair that is less likely to cause a problem in strength.

上記課題は、「特許請求の範囲」の欄における各請求項に記載するように、次のような構成からなる発明によって解決される。 The above-described problems are solved by the invention having the following configuration, as described in each claim in the section “Claims”.

（１）座体を座支持体に対して前後方向に移動可能に支持した椅子において、座支持体に左右一対の前後方向を向くレール部、座体の下面に前記レール部に対応して左右一対の前後方向を向くレール受部を、それぞれ設け、レール受部をレール部上に摺動しうるように支持させるとともに、両レール部の左右方向の外側部または内側部に係合片、両レール受部の左右方向の外側部または内側部に係合溝を、それぞれ設け、係合片を係合溝に係合させることにより、座体を、左右方向への移動を防止して座支持体上に支持する。 (1) In a chair that supports a seat body so as to be movable in the front-rear direction with respect to the seat support body, a pair of left and right rail portions facing the front-rear direction on the seat support body, A pair of rail receiving portions facing in the front-rear direction are provided to support the rail receiving portions so that they can slide on the rail portions. Engagement grooves are provided on the outer side or inner side in the left-right direction of the rail receiving part, and the seat is supported by preventing the movement in the left-right direction by engaging the engagement piece with the engagement groove. Support on the body.

（２）上記（１）項において、レール部を、その上部が座体の下面に摺接しうる平坦面を備えるものとし、この平坦面の外側端部または内側端部に係合片を設ける。 (2) In the above item (1), the rail portion is provided with a flat surface whose upper portion can be brought into sliding contact with the lower surface of the seat body, and an engagement piece is provided at an outer end portion or an inner end portion of the flat surface.

（３）上記（２）項において、レール受部を、前後方向のリブからなるものとし、このリブの外側部または内側部に係合溝を設ける。 (3) In the above item (2), the rail receiving portion is constituted by a rib in the front-rear direction, and an engaging groove is provided on the outer side or the inner side of the rib.

（４）上記（３）項において、左右一対の各レール受部を、それぞれ複数の前後方向のリブと、これらのリブを連結する左右方向のリブとからなるものとする。 (4) In the above item (3), each of the pair of left and right rail receiving portions is composed of a plurality of longitudinal ribs and a lateral rib connecting these ribs.

（５）上記（２）〜（４）項のいずれかにおいて、係合片を、レール部の平坦面の外側端部に左右方向の外側を向く倒立Ｌ字状のものとして形成するとともに、係合溝を、前後方向のリブからなるレール受部における外側リブに近接させて、その外側に内側を向く正立Ｌ字状リブを設け、この正立Ｌ字状リブと前記外側リブとをもって係合溝を形成し、この係合溝に前記係合片を係合させる。 (5) In any one of the above items (2) to (4), the engagement piece is formed as an inverted L-shape that faces the outer side in the left-right direction at the outer end portion of the flat surface of the rail portion. An erect L-shaped rib facing inward is provided on the outer side of the joint groove in the vicinity of the outer rib in the rail receiving portion composed of the front and rear ribs, and the erect L-shaped rib and the outer rib are engaged. A mating groove is formed, and the engaging piece is engaged with the engaging groove.

本発明によると、次のような効果が奏せられる。
請求項１記載の発明によれば、レール部、レール受部を左右一対設け、かつ係合片と係合溝を係合させたため、座体を、座支持体に安定的に支持させた状態で、円滑に前後方向に移動させることができる。
また、レール部と、レール受部とは別の個所に、係合片と係合溝を設けて係合させるようにしたため、つまり、荷重を受ける強度メンバーと、左右方向の移動を阻止するメンバーを、それぞれ別途に設けたため、使用時の大きな荷重を、長期に亘って繰り返し受けても、強度的に問題が生じる虞が少ない。 According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, since the left and right rail portions and the rail receiving portion are provided and the engagement piece and the engagement groove are engaged, the seat body is stably supported by the seat support body. Thus, it can be smoothly moved in the front-rear direction.
In addition, since the engagement piece and the engagement groove are provided and engaged at different locations from the rail portion and the rail receiving portion, that is, the strength member that receives the load and the member that prevents the lateral movement. Therefore, even if a large load during use is repeatedly received over a long period of time, there is little risk of a problem in strength.

請求項２記載の発明によれば、レール部を、その上部が座体の下面に摺接しうる平坦面を備えるものとしたため、座体の円滑な前後方向の移動が可能になるとともに、荷重を受ける面が大きくなる。
また、レール部における平坦面の外側端部または内側端部に係合片を設けてあるため、荷重を受ける強度メンバーと左右方向への移動防止メンバーを別途にすることができ、座体が破損しにくくなる。 According to the invention described in claim 2, since the rail portion is provided with a flat surface whose upper part can be in sliding contact with the lower surface of the seat body, the seat body can be smoothly moved in the front-rear direction, and the load can be applied. The receiving surface becomes larger.
In addition, because the engagement piece is provided at the outer end or inner end of the flat surface of the rail, the strength member that receives the load and the movement prevention member in the left-right direction can be separated, and the seat body is damaged. It becomes difficult to do.

請求項３記載の発明によれば、レール受部を、前後方向のリブからなるものとし、このリブの外側部または内側部に係合溝を設けてあるので、座支持体のレール部に、座体のレール受部を容易に組み付けることができる。 According to the invention of claim 3, since the rail receiving portion is made of a rib in the front-rear direction, and the engaging groove is provided in the outer side portion or the inner side portion of the rib, The rail receiving portion of the seat body can be easily assembled.

請求項４記載の発明によれば、左右一対の各レール受部を、それぞれ複数の前後方向のリブと、これらのリブを連結する左右方向のリブとからなるものとしてあるので、座体の強度を低下させることなく、座体と一体化したレール受部の形成が容易に行える。
また、リブの下端は、接触面積が小さく、摩擦抵抗が小さいため、座体の円滑な前後方向の移動が可能になる。 According to the fourth aspect of the present invention, each of the pair of left and right rail receiving portions is composed of a plurality of front and rear ribs and left and right ribs connecting these ribs. The rail receiving part integrated with the seat body can be easily formed without lowering.
Further, since the lower end of the rib has a small contact area and a small frictional resistance, the seat body can be smoothly moved in the front-rear direction.

請求項５記載の発明によれば、係合片を、レール部の平坦面の外側端部に左右方向の外側を向く倒立Ｌ字状のものとして形成するとともに、係合溝を、前後方向のリブからなるレール受部における外側リブに近接させて、その外側に内側を向く正立Ｌ字状リブを設け、この正立Ｌ字状リブと外側リブとをもって係合溝を形成し、この係合溝に係合片を係合させてあるので、座支持体のレール部に、座体のレール受部を容易に組み付けることができるとともに、座体の左右方向への移動を効果的に防止することができ、かつ座体を、座支持体に対して前後方向に円滑にかつ安定して移動させることができる。 According to the fifth aspect of the present invention, the engaging piece is formed as an inverted L-shape facing the outer side in the left-right direction at the outer end portion of the flat surface of the rail portion, and the engaging groove is formed in the front-rear direction. An erect L-shaped rib facing inward is provided on the outer side of the rail receiving portion made of a rib close to the outer rib, and an engaging groove is formed by the erect L-shaped rib and the outer rib. Since the engagement piece is engaged with the mating groove, the rail receiving portion of the seat body can be easily assembled to the rail portion of the seat support body, and the movement of the seat body in the left-right direction is effectively prevented. And the seat can be moved smoothly and stably in the front-rear direction with respect to the seat support.

以下、本発明を、代表的な実施形態を挙げて説明する。
図１、図２は、本発明を実施した椅子の、それぞれ側面図、正面図である。 Hereinafter, the present invention will be described with reference to representative embodiments.
1 and 2 are a side view and a front view, respectively, of a chair embodying the present invention.

椅子１は、脚体２の上端に支基３が取付けられ、この支基３には、背杆４と座支持杆５とが軸支されている。
背杆４と座支持杆５によって、座支持体６が支持され、この座支持体６によって、座体７が支持されている。
座体７は、座板８の上面に、クッション体９を取付けて構成されている。 In the chair 1, a support base 3 is attached to the upper end of the leg 2, and a back rod 4 and a seat support rod 5 are pivotally supported on the support base 3.
The seat support 6 is supported by the back support 4 and the seat support support 5, and the seat 7 is supported by the seat support 6.
The seat body 7 is configured by attaching a cushion body 9 to the upper surface of the seat plate 8.

座体７の後方には、背杆４によって背凭れ１０が、リクライニング可能に支持されている。
座体７は、背凭れ１０のリクライニングによって前後に移動するとともに、座体７は、座支持体６に対して前後方向に移動可能に支持されている。
座体７の下方には、操作レバー１１が設けられており、この操作レバー１１を操作することにより、座体７の座支持体６に対する前後位置を調節しうるようになっている。 A backrest 10 is supported behind the seat body 7 by a backrest 4 so as to be reclining.
The seat body 7 is moved back and forth by the reclining of the backrest 10, and the seat body 7 is supported so as to be movable in the front-rear direction with respect to the seat support body 6.
An operation lever 11 is provided below the seat body 7, and by operating the operation lever 11, the front-rear position of the seat body 7 with respect to the seat support body 6 can be adjusted.

図３は、座支持体に支持させた座体の下方斜視図、図４は、操作手段を取り外した座体の下方斜視図、図５は、座支持体と座体の分解斜視図、図６は、図３におけるVI-VI線端面図、図７は、図６における一点鎖線円VII内の要部拡大図、図８は、図３におけるXIII-XIII線断面図、図９は、図８の底面図、図１０、図１２、図１４は、それぞれ図８における一点鎖線円Ｘ、XII、XIV内の要部拡大図、図１１、図１３、図１５は、それぞれ図９における一点鎖線円XI、XIII、XV内の要部拡大図である。
但し、図６〜図８、図１０、図１２については、一部仮想線で示す。 3 is a lower perspective view of the seat supported by the seat support, FIG. 4 is a lower perspective view of the seat with the operating means removed, and FIG. 5 is an exploded perspective view of the seat support and the seat. 6 is an end view taken along the line VI-VI in FIG. 3, FIG. 7 is an enlarged view of the main part in the chain line VII in FIG. 6, FIG. 8 is a cross-sectional view taken along the line XIII-XIII in FIG. 8, FIG. 10, FIG. 12, and FIG. 14 are enlarged views of main parts in the dashed-dotted circles X, XII, and XIV in FIG. 8, respectively, and FIGS. 11, 13, and 15 are dashed-dotted lines in FIG. It is a principal part enlarged view in circle XI, XIII, and XV.
However, FIG. 6 to FIG. 8, FIG. 10, and FIG.

図３、図５〜図７に示すように、座支持体６には、左右方向の基部１２に、一対の前後方向を向くレール部１３、１３が前向きに設けられ、このレール部１３上に、座体７の下面に、同じく左右一対設けられた前後方向を向くレール受部１４、１４が、前後方向に摺動しうるように支持されている。 As shown in FIGS. 3 and 5 to 7, the seat support 6 is provided with a pair of front and rear rail portions 13 and 13 on the base portion 12 in the left and right direction, and on the rail portion 13. A pair of left and right rail receiving portions 14 and 14 facing in the front-rear direction are supported on the lower surface of the seat body 7 so as to be slidable in the front-rear direction.

レール部１２は、図５に示すように、前後方向のレール基台１５上に、上面に平坦面１６ａを備える上面板１６を、ねじ１７をもって固定して形成されている。
レール基台１５には、前後方向に長手の平面視ほぼ長方形状の凹部１５ａが設けられている。 As shown in FIG. 5, the rail portion 12 is formed by fixing an upper surface plate 16 having a flat surface 16 a on the upper surface with screws 17 on a rail base 15 in the front-rear direction.
The rail base 15 is provided with a concave portion 15a having a substantially rectangular shape in a plan view that is long in the front-rear direction.

上面板１６における平坦面１６ａの左右方向の外側端部は、前方視において外側を向く倒立Ｌ字状に折り曲げられ、係合片１６ｂが形成されている。
他方、平坦面１６ａの内側端部は、下方に折り曲げられて下向片１６ｃが形成されている。
上面板１６の平坦面１６ａには、レール基台１５の凹部１５ａに対応する位置に、上下方向に貫通する平面視ほぼ長方形状の開口部１６ｄが設けられている。 The left and right outer end portions of the flat surface 16a of the upper surface plate 16 are bent into an inverted L shape facing outward when viewed from the front, and an engagement piece 16b is formed.
On the other hand, the inner end portion of the flat surface 16a is bent downward to form a downward piece 16c.
The flat surface 16a of the upper surface plate 16 is provided with an opening 16d having a substantially rectangular shape in plan view penetrating in the vertical direction at a position corresponding to the recess 15a of the rail base 15.

この開口部１６ｄには、一方のレール部１３には、左右方向の内側の内周端面に、他方のレール部１３には、左右方向の外側の内周端面に、それぞれ爪状の被係合部１６ｅ前後方向複数設けられている。 The opening 16d has a claw-like engagement with one rail portion 13 on the inner peripheral end surface in the left-right direction and the other rail portion 13 with the inner peripheral end surface in the left-right direction. A plurality of portions 16e are provided in the front-rear direction.

上面板１６は、レール基台１５上に、レール基台１５の凹部１５ａと上面板１６の開口部１６ｄとの位置を整合させた状態で固定されている。
これにより、レール部１３の平坦面１６ａには、上方が開口し、前後が閉塞される開口部１６ｄが形成される。 The upper surface plate 16 is fixed on the rail base 15 in a state where the positions of the recesses 15 a of the rail base 15 and the openings 16 d of the upper surface plate 16 are aligned.
As a result, the flat surface 16a of the rail portion 13 is formed with an opening portion 16d that opens upward and is closed front and back.

図３、図４に示すように、座体７の下面には、座支持体６の左右一対のレール部１３、１３に対応して、左右一対のレール受部１４、１４が形成されている。
このレール受部１４は、複数の前後方向のリブ１８と、これらのリブ１８を連結する左右方向のリブ１９とより形成されている。 As shown in FIGS. 3 and 4, on the lower surface of the seat body 7, a pair of left and right rail receiving portions 14, 14 are formed corresponding to the pair of left and right rail portions 13, 13 of the seat support 6. .
The rail receiving portion 14 is formed by a plurality of front and rear ribs 18 and left and right ribs 19 connecting the ribs 18.

図７に示すように、複数の前後方向のリブ１８のうちの外側リブ１８ａに近接して、その外側にリブ２０を設け、このリブ２０の下端に、内側を向く複数の係合片２０ａを前後方向に適宜の間隔をもって突設することにより、リブ２０が、前後方向に向けて部分的に正立Ｌ字状をなすようにとともに、この正立Ｌ字状リブ２０と外側リブ１８ａとをもって、係合溝２１が、少なくとも後方が開放しうるように形成されている。
なお、本実施形態においては、係合片１６ｂ、係合溝２１を、それぞれ両レール部１３、１３、両レール受部１４、１４における左右方向の外側部に設けたが、これに代えて、それぞれ内側部に設けてもよい。 As shown in FIG. 7, a rib 20 is provided outside the rib 18 in the vicinity of the outer rib 18 a among the plurality of ribs 18 in the front-rear direction, and a plurality of engagement pieces 20 a facing inward are provided at the lower end of the rib 20. By projecting at an appropriate interval in the front-rear direction, the rib 20 has a partially upright L-shape toward the front-rear direction, and has the upright L-shaped rib 20 and the outer rib 18a. The engaging groove 21 is formed so that at least the rear can be opened.
In the present embodiment, the engaging piece 16b and the engaging groove 21 are provided on the outer side portions in the left and right directions of the rail portions 13 and 13 and the rail receiving portions 14 and 14, respectively. You may provide in an inner part, respectively.

座体７を、座支持体６に対して組み付けて、前後方向に移動可能に支持させるには、次のようにする。
座支持体６におけるレール部１３の前端部側から、座体７の下面に設けたレール受部１４の後端部を後方に向けて移動させながら、レール部１３上部の平坦面１６ａ上に、レール受部１４を形成するリブ１８の下端を摺動しうるように支持させるとともに、レール部１３の左右方向の外側部に形成した係合片１６ｂが、レール受部１４の左右方向の外側部に外側リブ１８ａと正立Ｌ字状リブ２０とをもって形成した係合溝２１における係合片２０ａの上方に位置しうるように係合させる。
これにより、座支持体６上に、座体７を、その左右方向への移動を防止して、前後方向に移動可能に組み付けることができる。 The seat 7 is assembled to the seat support 6 and supported so as to be movable in the front-rear direction as follows.
While moving the rear end portion of the rail receiving portion 14 provided on the lower surface of the seat body 7 from the front end side of the rail portion 13 in the seat support body 6 toward the rear, on the flat surface 16a on the upper portion of the rail portion 13, The lower end of the rib 18 forming the rail receiving portion 14 is supported so as to be slidable, and the engaging piece 16b formed on the outer side in the left and right direction of the rail portion 13 is the outer side portion of the rail receiving portion 14 in the left and right direction. The engagement groove 21 formed by the outer rib 18a and the upright L-shaped rib 20 is engaged so as to be positioned above the engagement piece 20a.
Thereby, the seat body 7 can be assembled on the seat support body 6 so as to be movable in the front-rear direction while preventing the seat body 7 from moving in the left-right direction.

座体７の下方には、操作レバー１１が設けられており、この操作レバー１１を操作することにより、座体７の座支持体６に対する前後位置を調節しうるようになっている。
操作レバー１１の操作によって生ずる出力は、この操作レバー１１に連動する調節杆２２によって伝達される。 An operation lever 11 is provided below the seat body 7, and by operating the operation lever 11, the front-rear position of the seat body 7 with respect to the seat support body 6 can be adjusted.
The output generated by the operation of the operation lever 11 is transmitted by the adjusting rod 22 that is interlocked with the operation lever 11.

操作手段２３は、前記操作レバー１１と調節杆２２によって構成される。
調節杆２２は、座体７の下面に設けた補強用の前後一対の左右方向のリブ２４、２４により形成したガイド部２５内に、左右方向に移動可能、かつ前後方向に実質的に移動不能に配設されている。 The operation means 23 includes the operation lever 11 and the adjustment rod 22.
The adjusting rod 22 is movable in the left-right direction and substantially immovable in the front-rear direction in a guide portion 25 formed by a pair of front-rear left-right ribs 24, 24 provided on the lower surface of the seat body 7. It is arranged.

前記レール受部１４を形成するリブ１８と、ガイド部２５を形成するリブ２４が交差する部分において、レール受部１４を形成するリブ１８の下端は、ガイド部２５を形成するリブ２４の下端と同一または下方に位置させてある。 At the portion where the rib 18 forming the rail receiving portion 14 and the rib 24 forming the guide portion 25 intersect, the lower end of the rib 18 forming the rail receiving portion 14 is the lower end of the rib 24 forming the guide portion 25. It is the same or located below.

図８、図９に示すように、座体７の調節杆２２は、左右方向を向く板状体をなし、レール部１３と交差する部分がやや上方に位置するように湾曲されているとともに、この部分にレール部１３の被係合部１６ｅと係合しうる係合部２６ａとを備える係合基部２６が下向きに設けられている。
すなわち、調節杆２２には、座支持体６における左右一対のレール部１３、１３に設けられた被係合部１６ａの各一方にそれぞれ係脱しうるようにした左右一対の係合部２６ａ、２６ａが設けられている。 As shown in FIGS. 8 and 9, the adjustment rod 22 of the seat body 7 forms a plate-like body facing in the left-right direction, and is curved so that the portion intersecting with the rail portion 13 is located slightly above, An engaging base portion 26 including an engaging portion 26 a that can engage with the engaged portion 16 e of the rail portion 13 is provided downward in this portion.
That is, the adjustment rod 22 has a pair of left and right engaging portions 26a, 26a that can be engaged with and disengaged from each of the engaged portions 16a provided on the pair of left and right rail portions 13, 13 of the seat support 6. Is provided.

レール部１３の左右一対の被係合部１６ｅと、調節杆２２の左右一対の係合部２６ａとの係合方向は、左右方向のいずれか一方の同一方向を向くように形成されている。
このため、調節杆２２を左右方向に移動させることにより、左右一対の係合部２６ａと被係合部１６ｅとの係脱を同時に行うことができる。
この係脱は、レール部１３の平坦面１６ａよりも下方、または平坦面１６ａと同一の高さ位置において行われる。 The engaging direction of the pair of left and right engaged portions 16e of the rail portion 13 and the pair of left and right engaging portions 26a of the adjusting rod 22 is formed so as to face either one of the left and right directions.
For this reason, by moving the adjusting rod 22 in the left-right direction, the pair of left and right engaging portions 26a and the engaged portion 16e can be simultaneously engaged and disengaged.
This engagement / disengagement is performed below the flat surface 16a of the rail portion 13 or at the same height as the flat surface 16a.

図８〜図１１、図１３に示すように、調節杆２２は、左右一対のレール部１３、１３上に支持されており、レール部１３はガイド部２５よりも下方に位置し、レール部１３の上面の平坦面１６ａにおける開口部１６ｄに設けられた被係合部１６ｅと、調節杆２２から下向きに形成された係合基部２６に設けられた係合部２６ａとの係脱が、開口部１６ｄ内のレール部１３の上面よりも下方の位置において行われる。
これにより、係合基部２６が開口部１６ｄの前後内周端面に当接して、座体７の座支持体６に対する前後方向の摺動限界が規制されるとともに、開口部１６ｄの左右の少なくとも一方の内周端面に設けた複数の被係合部１６ｅに選択的に、調節杆２２の係合部２６ａを係合させることによって、座支持体６に対して、座体７を前後方向の複数位置で停止させることができる。 As shown in FIGS. 8 to 11 and 13, the adjustment rod 22 is supported on a pair of left and right rail portions 13 and 13, and the rail portion 13 is positioned below the guide portion 25. Engagement / disengagement between the engaged portion 16e provided in the opening portion 16d in the flat surface 16a on the upper surface of the engagement portion and the engaging portion 26a provided in the engagement base portion 26 formed downward from the adjustment rod 22 is performed in the opening portion 16d. This is performed at a position below the upper surface of the inner rail portion 13.
As a result, the engagement base portion 26 comes into contact with the front and rear inner peripheral end surfaces of the opening portion 16d, and the sliding limit of the seat body 7 with respect to the seat support body 6 is restricted, and at least one of the left and right sides of the opening portion 16d is restricted. By selectively engaging the engaging portions 26a of the adjusting rod 22 with the plurality of engaged portions 16e provided on the inner peripheral end surface, the seat body 7 is moved in the front-rear direction with respect to the seat support body 6. Can be stopped in position.

調節杆２２の一端には、操作レバー１１との連結部２７が設けられている。連結部２７は、調節杆２２の一端の前後縁にそれぞれ側板２７ａ、２７ａを立設して上向きコ字状となし、これらの側板２７ａに、左右方向に延びる長孔Ａ２８と、この長孔Ａ２８の左右方向の内側に、内側下向きに延びる長孔Ｂ２９を穿設して形成されている。 One end of the adjustment rod 22 is provided with a connecting portion 27 with the operation lever 11. The connecting portion 27 has side plates 27a and 27a provided upright at the front and rear edges of one end of the adjusting rod 22 to form an upward U-shape. The side plate 27a has a long hole A28 extending in the left-right direction and the long hole A28. Is formed by drilling a long hole B29 extending inward and downward.

一方、操作レバー１１は、座体７に設けた前後方向の枢軸３０の回りに回動しうるように設けられているとともに、前記枢軸３０は、調節杆２２における連結部２７の長孔Ａ２８に挿通されている。 On the other hand, the operating lever 11 is provided so as to be able to turn around the pivot 30 in the front-rear direction provided on the seat body 7, and the pivot 30 is inserted into the elongated hole A 28 of the connecting portion 27 in the adjustment rod 22. It is inserted.

操作レバー１１の非操作側の端部には、調節杆２２における連結部２７の長孔Ｂ２９に係止される係止部１１ａが設けられており、操作レバー１１の回動操作により、前記係止部１１ａを長孔Ｂ２９によってガイドすることによって、調節杆２２が左右に摺動することとなる。 At the non-operating side end of the operating lever 11, there is provided a locking portion 11 a that is locked to the elongated hole B 29 of the connecting portion 27 of the adjustment rod 22. By guiding the stop portion 11a with the long hole B29, the adjusting rod 22 slides to the left and right.

図１４、図１５に示すように、調節杆２２には、この調節杆２２に設けられた係合部２６ａを、レール部１３の被係合部１６ｅに係合させる方向に常時付勢する付勢手段３１が設けられている。 As shown in FIG. 14 and FIG. 15, the adjustment rod 22 is always urged so that the engaging portion 26 a provided on the adjustment rod 22 is engaged with the engaged portion 16 e of the rail portion 13. A biasing means 31 is provided.

調節杆２２には、図８、図１４、図１５に示すように、その左右方向の中央部に、付勢手段３１としての圧縮ばねを収容する収容部３２が設けられている。
この収容部３２は、調節杆２２に上下に貫通する平面視長方形状の開口３２を穿設し、この開口３２を上方が開口する箱状体３２ｂをもって下方から覆うとともに、この箱状体３２ｂの底部の左半分を切り取ったような形状をなしている。
底部が設けられていない方の左側壁３２ｃには、係止突起３２ｄが右向きに突設されている。 As shown in FIGS. 8, 14, and 15, the adjusting rod 22 is provided with a housing portion 32 that houses a compression spring as the biasing means 31 at the center in the left-right direction.
The accommodation portion 32 is formed with a rectangular opening 32 in plan view that penetrates the adjustment rod 22 in the vertical direction, and covers the opening 32 from below with a box-like body 32b that opens upward. It is shaped like a left half of the bottom.
A locking projection 32d protrudes rightward on the left side wall 32c on which the bottom is not provided.

一方、座体７の下面には、前記係止突起３２ｄに対向させて、左向きに突設させた係止突起３３ａを備える係止片３３が設けられている
圧縮ばね３１は、その左右各端がそれぞれ前記の各係止突起３２ｄ、３３ａに係止されて、両係止突起３２ｄ、３３ａ間に介在されている。 On the other hand, the lower surface of the seat body 7 is provided with a locking piece 33 provided with a locking projection 33a that protrudes leftward so as to face the locking projection 32d. Are respectively engaged with the locking projections 32d and 33a and interposed between the locking projections 32d and 33a.

この圧縮ばね３１により、調節杆２２は、前記係合部２６ａを被係合部１６ｅと係合させる方向に常時付勢されており、操作レバー１１を操作したときに、前記係合が解除され、座体７が座支持体６に対して前後方向に移動可能となり、操作レバー１１から手を離すことにより、圧縮ばね３１の付勢力により、再び係合状態となるようになっている。
したがって、操作レバー１１によって、係合部２６ａと被係合部１６ｅとの係脱を行い、座支持体６に対する座体７の前後位置の固定及び解除をなし、前記位置調節を容易に行うことができる。 The adjustment spring 22 is always urged by the compression spring 31 in the direction in which the engaging portion 26a is engaged with the engaged portion 16e, and the engagement is released when the operation lever 11 is operated. The seat body 7 is movable in the front-rear direction with respect to the seat support body 6, and is released from the operation lever 11 to be engaged again by the urging force of the compression spring 31.
Therefore, the engaging lever 26a and the engaged portion 16e are engaged and disengaged by the operation lever 11, the front and rear positions of the seat body 7 are fixed to and released from the seat support body 6, and the position adjustment is easily performed. Can do.

また、付勢手段としての圧縮ばね３１を収容する収容部３２を、調節杆２２に設けてあるので、調節杆２２を、被係合部１６ｅと係合部２６ａとの解除状態から係合状態に戻す際に、下方へ撓もうとする圧縮ばね３１の撓みが、収容部３２によって受けられ、この撓み動作の繰返しによる圧縮ばね３１の取付部位の位置ずれを回避することができる。 Further, since the accommodating portion 32 that accommodates the compression spring 31 as the biasing means is provided in the adjusting rod 22, the adjusting rod 22 is engaged from the released state of the engaged portion 16e and the engaging portion 26a. When returning, the bending of the compression spring 31 to be bent downward is received by the housing portion 32, and it is possible to avoid displacement of the attachment site of the compression spring 31 due to repetition of this bending operation.

本発明を実施した椅子の側面図である。It is a side view of the chair which implemented this invention. 同じく、椅子の正面図である。Similarly, it is a front view of a chair. 座支持体に支持させた座体の下方斜視図である。It is a downward perspective view of the seat supported by the seat support. 操作手段を取り外した座体の下方斜視図である。It is a downward perspective view of the seat which removed the operation means. 座支持体と座体の分解斜視図である。It is a disassembled perspective view of a seat support body and a seat body. 図３におけるVI-VI線端面図（一部仮想線で示す）である。FIG. 6 is an end view (partially indicated by imaginary lines) of the VI-VI line in FIG. 3. 図６における一点鎖線円VII内の要部拡大図（一部仮想線で示す）である。FIG. 7 is an enlarged view of a main part in a dashed-dotted line circle VII in FIG. 6 (partially indicated by an imaginary line). 図３におけるXIII-XIII線断面図（一部仮想線で示す）である。FIG. 4 is a sectional view taken along line XIII-XIII in FIG. 3 (partially indicated by imaginary lines). 図８の底面図である。It is a bottom view of FIG. 図８における一点鎖線円Ｘ内の要部拡大図（一部仮想線で示す）である。It is a principal part enlarged view in the dashed-dotted line circle | round | yen X in FIG. 8 (a part is shown with a virtual line). 図９における一点鎖線円XI内の要部拡大図である。It is a principal part enlarged view in the dashed-dotted line circle XI in FIG. 図８における一点鎖線円XII内の要部拡大図（一部仮想線で示す）である。It is a principal part enlarged view in the dashed-dotted line circle XII in FIG. 8 (a part is shown with a virtual line). 図９における一点鎖線円XIII内の要部拡大図である。It is a principal part enlarged view in the dashed-dotted line circle XIII in FIG. 図８における一点鎖線円XIV内の要部拡大図である。It is a principal part enlarged view in the dashed-dotted line circle XIV in FIG. 同じく、図９における一点鎖線円XV内の要部拡大図である。Similarly, it is a principal part enlarged view in the dashed-dotted line circle XV in FIG.

Explanation of symbols

１椅子
２脚体
３支基
４背杆
５座支持杆
６座支持体
７座体
８座板
９クッション体
１０背凭れ
１１操作レバー
１１ａ係止部
１２基部
１３レール部
１４レール受部
１５レール基台
１５ａ凹部
１６上面板
１６ａ平坦面
１６ｂ係合片
１６ｃ下向片
１６ｄ開口部
１６ｅ被係合部
１７ねじ
１８リブ
１８ａ外側リブ
１９リブ
２０正立Ｌ字状リブ
２０ａ係合片
２１係合溝
２２調節杆
２３操作手段
２４リブ
２５ガイド部
２６係合基部
２６ａ係合部
２７連結部
２７ａ側板
２８長孔Ａ
２９長孔Ｂ
３０枢軸
３１付勢手段（圧縮ばね）
３２収容部
３２ａ開口
３２ｂ箱状体
３２ｃ右側壁
３２ｄ係止突起
３３係止片
３３ａ係止突起 DESCRIPTION OF SYMBOLS 1 Chair 2 Leg 3 Support base 4 Back 5 Seat support 6 Seat support 7 Seat 8 Seat plate 9 Cushion 10 Backrest 11 Operation lever 11a Locking part 12 Base 13 Rail part 14 Rail receiving part 15 Rail base Base 15a Concave 16 Top plate 16a Flat surface 16b Engagement piece 16c Downward piece 16d Opening 16e Engagement part 17 Screw 18 Rib 18a Outer rib 19 Rib 20 Erect L-shaped rib 20a Engagement piece 21 Engagement groove 22 Adjustment rod 23 Operating means 24 Rib 25 Guide part 26 Engagement base part 26a Engagement part 27 Connection part 27a Side plate 28 Slot A
29 Long hole B
30 Axis 31 Biasing means (compression spring)
32 Housing portion 32a Opening 32b Box-shaped body 32c Right side wall 32d Locking protrusion 33 Locking piece 33a Locking protrusion

Claims

In a chair that supports the seat so as to be movable in the front-rear direction with respect to the seat support,
A pair of left and right rails facing the front and rear direction are provided on the seat support body, and a pair of left and right front and rear rail receiving parts corresponding to the rail part are provided on the lower surface of the seat body. It is supported so that it can move, and an engaging piece is provided on the outer side or the inner side in the left and right direction of both rail parts, and an engaging groove is provided on the outer side or the inner side in the left and right direction of both rail receiving parts. A chair characterized in that the seat is supported on the seat support by preventing the movement in the left-right direction by engaging the piece with the engagement groove.

The chair according to claim 1, wherein the rail portion is provided with a flat surface whose upper portion can be brought into sliding contact with the lower surface of the seat body, and an engagement piece is provided at an outer end portion or an inner end portion of the flat surface.

The chair according to claim 2, wherein the rail receiving portion is formed of a rib in the front-rear direction, and an engaging groove is provided on an outer side or an inner side of the rib.

The chair according to claim 3, wherein each of the pair of left and right rail receiving portions includes a plurality of front and rear ribs and a left and right rib connecting the ribs.

The engaging piece is formed as an inverted L-shaped one facing the outer side in the left-right direction at the outer end of the flat surface of the rail part, and the engaging groove is formed on the outer rib in the rail receiving part made up of the ribs in the front-rear direction. An upright L-shaped rib facing inward is provided on the outside, and an engaging groove is formed by the upright L-shaped rib and the outer rib, and the engaging piece is engaged with the engaging groove. The chair according to any one of claims 2 to 4, which is combined.