JP7339122B2

JP7339122B2 - Chair

Info

Publication number: JP7339122B2
Application number: JP2019195353A
Authority: JP
Inventors: 裕一郎 ▲高▼木
Original assignee: Okamura Corp
Current assignee: Okamura Corp
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2023-09-05
Anticipated expiration: 2039-10-28
Also published as: JP2023155328A; JP2021065605A

Description

本発明は、椅子に関する。 The present invention relates to chairs.

従来、椅子において、着座者が着座可能な着座面を有し弾性変形可能なシート状の座面構成部材と、椅子の幅方向に離間し座面構成部材が架設される一対の杆材と、を有する座と、幅方向に離間し座を幅方向に沿う軸の回りに回動可能に支持する一対の座支持部を有する支持構造体と、を備えるものが公知である。
例えば、特許文献１では、座体は、背凭れの一対の背側連結片に対応する一対の座側固定片を備える。座体は、座側固定片に左右方向に延びる軸体を通して背側連結片に連結されることにより、軸体の回りに回動可能とされている。座体は、平面視で四角形の枠体に囲まれた領域に、着座面となるシート状部材が張り掛けられたものである。枠体は、表側枠体と裏側枠体とが表裏方向に重ねられたものである。シート状部材は、表側枠体に張り掛けられている。
このように枠体にシート状の座面構成部材を張設して構成される座においては、座面構成部材の周縁部を枠体の係合溝に係合させることにより、座面構成部材を枠体に張設するのが一般的である。 Conventionally, in a chair, an elastically deformable sheet-shaped seat surface forming member having a seating surface on which a seated person can sit, a pair of rod members spaced apart in the width direction of the chair and on which the seat surface forming members are installed, and a support structure having a pair of seat support portions spaced apart in the width direction and supporting the seat so as to be rotatable about an axis extending in the width direction.
For example, in Patent Document 1, the seat includes a pair of seat-side fixing pieces corresponding to a pair of back-side connecting pieces of the backrest. The seat body is rotatable about the shaft by connecting the seat body to the back-side connecting piece through the shaft extending in the left-right direction through the seat-side fixing piece. The seat body has a sheet-like member that serves as a seating surface and is put on a region surrounded by a rectangular frame in a plan view. The frame body is formed by stacking a front side frame body and a back side frame body in the front and back direction. The sheet-like member is stretched over the front side frame.
In such a seat constructed by stretching a sheet-like seat structure member on the frame body, the seat structure member can be moved by engaging the peripheral edge portion of the seat structure member with the engagement groove of the frame body. is generally stretched on the frame.

特開２０１５－１９８９０１号公報JP 2015-198901 A

しかし、座側固定片はシート状部材よりも上方に起立しているため、枠体の外周に係合溝を設け、シート状部材の周縁部を枠体の係合溝に係合させる方法を採用することは容易ではない。一方、枠体の座側固定片よりも内側の部位に係合溝を設けようとすると、係合溝を開口させるための金型の抜き方向に座側固定片が位置するため、同じ金型によって一度に成型できない場合がある。この場合、成型工程が一工程増えるため、座を容易に成形する上で改善の余地があった。 However, since the seat-side fixing piece is erected above the sheet-like member, a method of providing an engaging groove on the outer periphery of the frame and engaging the peripheral edge of the sheet-like member with the engaging groove of the frame is proposed. Recruitment is not easy. On the other hand, if an attempt is made to provide an engagement groove in a portion inside the seat-side fixing piece of the frame, the seat-side fixing piece is positioned in the drawing direction of the mold for opening the engagement groove. It may not be possible to mold at once due to In this case, there is room for improvement in terms of easily forming the seat because the molding process is increased by one process.

以上のような事情に鑑み、本発明は、座を容易に成形することが可能な椅子を提供することを目的とする。 In view of the circumstances as described above, an object of the present invention is to provide a chair whose seat can be easily molded.

本発明の一態様に係る椅子は、着座者が着座可能な着座面を有し弾性変形可能なシート状の座面構成部材と、椅子の幅方向に離間し前記座面構成部材が架設される一対の杆材と、を有する座と、前記幅方向に離間し前記座を前記幅方向に沿う軸の回りに回動可能に支持する一対の座支持部を有する支持構造体と、を備え、前記座は、前記杆材から前記座支持部に向かって突出し前記軸の回りに回動可能に支持される被支持部を備え、前記杆材は、前記座面構成部材を係合可能に前記幅方向から見て前記被支持部とは重ならない範囲で前記幅方向の外側に開口する第１係合溝を有し、前記座は、前記杆材において前記被支持部と対向する部位に取り付けられ、前記幅方向から見て前記被支持部と重なる範囲を含む範囲で前記被支持部に対して前記幅方向の内側に設けられ前記第１係合溝と連続する第２係合溝を有する溝形成部材を備えることを特徴とする。 A chair according to an aspect of the present invention includes an elastically deformable sheet-shaped seat surface forming member having a seating surface on which a person can sit, and the seat surface forming member spaced apart in the width direction of the chair. a seat having a pair of rod members; and a support structure having a pair of seat support portions that are spaced apart in the width direction and support the seat so as to be rotatable around an axis along the width direction, The seat includes a supported portion protruding from the rod member toward the seat support portion and supported to be rotatable about the shaft, and the rod member engages the seat surface forming member. It has a first engagement groove that opens outward in the width direction within a range that does not overlap with the supported portion when viewed in the width direction, and the seat is attached to a portion of the rod member that faces the supported portion. and has a second engagement groove continuous with the first engagement groove provided inside the supported portion in the width direction within a range including a range overlapping with the supported portion when viewed in the width direction. A groove forming member is provided.

この構成によれば、第１係合溝が幅方向から見て被支持部とは重ならない範囲に開口することで、第１係合溝を開口するための金型の抜き方向に被支持部が位置しない。そのため、金型を同一方向にスライドさせることにより、被支持部及び第１係合溝を同じ金型によって一度に成型することができる。したがって、座を容易に成形することができる。
加えて、杆材に取り付けられた溝形成部材が第１係合溝と連続する第２係合溝を有することにより、座面構成部材の周縁部を第１係合溝及び第２係合溝に沿って係合させることができるため、座面構成部材を迅速に張設することができる。 According to this configuration, the first engaging groove opens in a range that does not overlap with the supported portion when viewed in the width direction, so that the supported portion extends in the drawing direction of the mold for opening the first engaging groove. is not located. Therefore, by sliding the mold in the same direction, the supported portion and the first engagement groove can be molded at once with the same mold. Therefore, the seat can be easily molded.
In addition, the groove forming member attached to the rod member has the second engaging groove continuous with the first engaging groove, so that the peripheral edge portion of the seat surface forming member is formed into the first engaging groove and the second engaging groove. , the seat surface forming member can be quickly stretched.

本発明の一態様において、前記被支持部と前記溝形成部材との間には、前記座面構成部材の厚み以上の隙間が形成されていてもよい。
この構成によれば、被支持部と前記溝形成部材との間の隙間を、座面構成部材の周縁部を第２係合溝に係合する際の作業スペースとして利用することができるため、座面構成部材を迅速に張設することができる。 In one aspect of the present invention, a gap greater than or equal to the thickness of the seat surface forming member may be formed between the supported portion and the groove forming member.
According to this configuration, the gap between the supported portion and the groove forming member can be used as a work space when engaging the peripheral portion of the seat surface forming member with the second engagement groove. The seat surface forming member can be quickly stretched.

本発明の一態様において、前記杆材は、前記幅方向と交差する方向に延びており、前記座は、前記杆材が延びる方向における前記一対の杆材の前記座支持部の側の端部同士を連結し前記幅方向に延びる幅方向延在部を更に備え、前記被支持部は、前記杆材と前記幅方向延在部との連結部に設けられていてもよい。
この構成によれば、被支持部は幅方向に沿う軸の回りに回動可能に支持されるという機能上、被支持部には大きな剛性が要求されるが、被支持部が杆材と幅方向延在部との連結部に設けられることにより、被支持部の剛性を確保することができる。 In one aspect of the present invention, the rod extends in a direction intersecting the width direction, and the seat is an end portion of the pair of rods on the seat support portion side in the extending direction of the rod. A width direction extension portion may be further provided which connects the rod members and extends in the width direction, and the supported portion may be provided at a connection portion between the rod member and the width direction extension portion.
According to this configuration, the supported portion is required to have high rigidity because of its function of being rotatably supported around the axis extending in the width direction. By being provided at the connecting portion with the direction extending portion, the rigidity of the supported portion can be ensured.

本発明の一態様において、前記溝形成部材は、前記杆材の前記座支持部の側の端部、前記杆材と前記幅方向延在部との連結部、及び前記幅方向延在部の前記幅方向の端部にわたって設けられていてもよい。
この構成によれば、杆材と幅方向延在部との連結部は被支持部が設けられるという構造上、前記連結部の周辺部には大きな剛性が要求されるが、溝形成部材が杆材の座支持部の側の端部、前記連結部、及び幅方向延在部の幅方向の端部にわたって設けられることにより、前記連結部の周辺部の剛性を確保することができる。 In one aspect of the present invention, the groove forming member includes an end portion of the rod member on the side of the seat support portion, a connecting portion between the rod member and the widthwise extending portion, and an end portion of the widthwise extending portion. It may be provided over the end portion in the width direction.
According to this configuration, since the supported portion is provided at the connecting portion between the rod member and the widthwise extending portion, the peripheral portion of the connecting portion is required to have high rigidity. The rigidity of the peripheral portion of the connecting portion can be ensured by being provided over the end portion of the member on the side of the seat support portion, the connecting portion, and the end portions in the width direction of the width direction extending portion.

本発明の一態様において、前記溝形成部材は、前記杆材の前記座支持部の側の端部、前記杆材と前記幅方向延在部との連結部、及び前記幅方向延在部の前記幅方向の端部のそれぞれに締結部材で固定されていてもよい。
この構成によれば、溝形成部材を強固に固定することができる。 In one aspect of the present invention, the groove forming member includes an end portion of the rod member on the side of the seat support portion, a connecting portion between the rod member and the widthwise extending portion, and an end portion of the widthwise extending portion. It may be fixed by a fastening member to each of the ends in the width direction.
With this configuration, the groove forming member can be firmly fixed.

本発明の一態様において、前記溝形成部材は、前記締結部材を挿通するための複数の挿通孔を有し、前記複数の挿通孔は、それぞれ同じ方向に開口していてもよい。
この構成によれば、金型を同一方向にスライドさせることにより、複数の挿通孔を同じ金型によって一度に成型することができる。したがって、溝形成部材を容易に成形することができる。 In one aspect of the present invention, the groove forming member may have a plurality of insertion holes for inserting the fastening member, and the plurality of insertion holes may open in the same direction.
According to this configuration, by sliding the mold in the same direction, a plurality of insertion holes can be molded at once with the same mold. Therefore, the groove forming member can be easily molded.

本発明の一態様において、前記座は、前記杆材及び前記幅方向延在部を前記着座面の側から覆うカバーを更に備え、前記溝形成部材は、前記杆材、前記幅方向延在部及び前記カバーの前記着座面の側の面と連続する外面を有してもよい。
この構成によれば、座面構成部材の周縁部を第２係合溝に係合する際、座面構成部材を溝形成部材の外面に沿わせて引っ張ることができるため、座面構成部材を迅速に張設することができる。 In one aspect of the present invention, the seat further includes a cover that covers the rod member and the widthwise extending portion from the seating surface side, and the groove forming member includes the rod member and the widthwise extending portion. and an outer surface continuous with the seating surface side surface of the cover.
According to this configuration, when the peripheral portion of the seat surface forming member is engaged with the second engagement groove, the seat surface forming member can be pulled along the outer surface of the groove forming member. Can be stretched quickly.

本発明によれば、座を容易に成形することができる。 According to the present invention, the seat can be easily molded.

実施形態に係る椅子の斜視図。The perspective view of the chair which concerns on embodiment. 実施形態に係る椅子の前面図。The front view of the chair which concerns on embodiment. 実施形態に係る椅子の左側面図。The left view of the chair which concerns on embodiment. 実施形態に係る椅子の上面図。The top view of the chair which concerns on embodiment. 実施形態に係る椅子の下面図。The bottom view of the chair which concerns on embodiment. 実施形態に係る座の収納状態の左側面図。Fig. 3 is a left side view of the seat according to the embodiment in a stored state; 実施形態に係る座の右側後部の角部の上面図。FIG. 4 is a top view of a right rear corner portion of the seat according to the embodiment; 図７においてアームカバーを取り外した状態の上面図。FIG. 8 is a top view of a state in which an arm cover is removed in FIG. 7; 図８において溝形成部材を取り外した状態の上面図。FIG. 9 is a top view of FIG. 8 with the groove forming member removed; 図７のＸ－Ｘ断面を含む前面図。FIG. 8 is a front view including the XX section of FIG. 7; 図７のＸＩ－ＸＩ断面を含む前面図。FIG. 8 is a front view including the XI-XI section of FIG. 7; 図７のＸＩＩ－ＸＩＩ断面を含む前面図。The front view including the XII-XII cross section of FIG. 図７のＸＩＩＩ－ＸＩＩＩ断面を含む左側面図。The left side view including the XIII-XIII cross section of FIG. 実施形態に係る係合爪の作用説明図。FIG. 4 is an explanatory diagram of action of the engaging claw according to the embodiment;

以下、本発明の実施形態について図面を参照して説明する。各図において、同一構成については同一の符号を付す。実施形態においては、椅子の一例として、着座者が着座可能な着座面を有する座と、座を着座者が着座可能な使用状態と使用状態に対して起立した収納状態との間で椅子の幅方向に沿う軸回りに回動可能に支持する支持構造体と、を備える椅子を挙げて説明する。実施形態において、椅子が設置される設置面は、水平面とする。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same code|symbol is attached|subjected about the same structure. In the embodiment, as an example of a chair, the width of the chair between a seat having a seating surface on which a sitter can sit, a use state in which a sitter can sit on the seat, and a storage state in which the seat is upright with respect to the use state. and a support structure that supports the chair so as to be rotatable about an axis along a direction. In the embodiment, the installation surface on which the chair is installed is a horizontal surface.

［椅子］
図１に示すように、椅子１は、座２と、支持構造体３と、背凭れ４と、肘掛け５と、を備える。座２、背凭れ４及び肘掛け５は、支持構造体３に支持されている。図１～図５は、座２の使用状態を示している。図６は、座２の収納状態を示している。 [Chair]
As shown in FIG. 1, chair 1 comprises seat 2 , support structure 3 , backrest 4 and armrests 5 . Seat 2 , backrest 4 and armrests 5 are supported by support structure 3 . 1 to 5 show how the seat 2 is used. FIG. 6 shows the stored state of the seat 2. As shown in FIG.

以下の説明においては、前後上下左右等の向きは、特に記載がなければ、水平面に設置した椅子１の使用状態の座２に、正規姿勢で着座した着座者の正面側を「前」、その反対側を「後」として説明する。つまり、図２に示す紙面に直交する方向を「前後方向（椅子１の奥行方向）」とする。また、水平面の法線方向（鉛直方向）を「上下方向（椅子１の高さ方向）」とする。また、前後方向および上下方向のそれぞれに直交する方向を「左右方向（椅子１の幅方向）」とする。図中において、前方を矢印ＦＲ、上方を矢印ＵＰ、左方を矢印ＬＨでそれぞれ示している。 In the following description, unless otherwise specified, the front, back, up, down, left, and so on of a seated person sitting in a normal posture on the seat 2 of the chair 1 placed on a horizontal plane in use is "front." The opposite side is described as "rear". In other words, the direction perpendicular to the plane of the paper shown in FIG. 2 is defined as the "front-rear direction (the depth direction of the chair 1)". Also, the normal direction (vertical direction) to the horizontal plane is defined as the "vertical direction (the height direction of the chair 1)". Also, a direction orthogonal to each of the front-rear direction and the up-down direction is defined as the "left-right direction (the width direction of the chair 1)". In the drawing, an arrow FR indicates the front, an arrow UP indicates the upper direction, and an arrow LH indicates the left direction.

［座］
図１に示すように、座２は、着座者が着座可能な着座面１０ａを有する張地１０（座面構成部材）と、張地１０が張設される矩形枠状の座枠１１と、左右方向に延びる座側連結部材１２と、軸９（図１２参照）の回りに回動可能に支持される被支持部１３と、座枠１１の内周を覆う内周カバー５０（カバー、図４参照）と、被支持部１３を覆うアームカバー６０と、被支持部１３と対向する範囲に配置された溝形成部材７０（図４参照）と、を備える。座２は、使用状態において座側連結部材１２が脚側連結部材３１に当接している。例えば、座枠１１及び座側連結部材１２は、同一の部材（例えば樹脂部材）で一体に形成されている。 [seat]
As shown in FIG. 1, the seat 2 includes an upholstery 10 (seat surface forming member) having a seating surface 10a on which a seated person can sit, a rectangular seat frame 11 on which the upholstery 10 is stretched, A seat-side connecting member 12 extending in the left-right direction, a supported portion 13 rotatably supported around a shaft 9 (see FIG. 12), and an inner peripheral cover 50 covering the inner periphery of the seat frame 11 (cover, FIG. 12). 4), an arm cover 60 covering the supported portion 13, and a groove forming member 70 (see FIG. 4) arranged in a range facing the supported portion 13. As shown in FIG. When the seat 2 is in use, the seat-side connecting member 12 is in contact with the leg-side connecting member 31 . For example, the seat frame 11 and the seat side connecting member 12 are integrally formed of the same member (for example, resin member).

［張地］
張地１０は、伸縮可能（弾性変形可能）なシート状をなしている。張地１０の外周部は、張地１０が前後方向及び左右方向に引っ張られた状態で、座枠１１に支持されている。張地１０のうち座枠１１よりも内側の部分（着座面１０ａ）は、上下方向に弾性変形可能とされている。 [Upholstery]
The upholstery 10 is in the form of a stretchable (elastically deformable) sheet. The outer peripheral portion of the upholstery 10 is supported by the seat frame 11 while the upholstery 10 is stretched in the longitudinal and lateral directions. A portion of the upholstery 10 inside the seat frame 11 (seating surface 10a) is elastically deformable in the vertical direction.

例えば、張地１０は、メッシュ材料によって伸縮可能に形成されている。図１４に示すように、張地１０の周縁部１０ｂは、袋状に形成されている。張地１０の周縁部１０ｂの内部には、縁材１４が挿入されて縫着されている。縁材１４は、弾性を有する合成樹脂製の細長い平板状に形成されている。張地１０は、左右方向外側に延びて周縁部１０ｂが係合爪２０で下方に折り返されている。係合爪２０で下方に折り返された周縁部１０ｂは、左右方向内側へ延び、係合溝１５ａへ挿入され、係合溝１５ａ内で係合されている。 For example, the upholstery 10 is formed of a mesh material so as to be stretchable. As shown in FIG. 14, the peripheral portion 10b of the upholstery 10 is formed in a bag shape. Inside the peripheral edge portion 10b of the upholstery 10, a rim material 14 is inserted and sewn. The rim member 14 is formed in the shape of an elongated flat plate made of elastic synthetic resin. The upholstery 10 extends outward in the left-right direction, and the peripheral edge portion 10b is folded downward by the engaging claws 20 . The peripheral edge portion 10b folded downward by the engaging claw 20 extends inward in the left-right direction, is inserted into the engaging groove 15a, and is engaged in the engaging groove 15a.

［座枠］
図４に示すように、座枠１１は、左右方向に離間する一対の杆材１５と、前後方向に離間する一対の横杆１６Ａ，１６Ｂと、を備える。座枠１１の角部には、溝形成部材７０が取り付けられる被取付部１７が形成されている（図９参照）。 [Seat frame]
As shown in FIG. 4, the seat frame 11 includes a pair of rod members 15 spaced apart in the left-right direction and a pair of horizontal rods 16A and 16B spaced apart in the front-rear direction. Attached portions 17 to which groove forming members 70 are attached are formed at the corners of the seat frame 11 (see FIG. 9).

被取付部１７は、座枠１１の角部において係合爪２０の上面よりも低く凹んでいる（図１２参照）。図１２に示すように、被取付部１７は、被支持部１３の設置面（被支持部１３の下端位置）と略同じ高さを有する。被取付部１７には、ボルト７３（締結部材、図１３参照）を螺着可能な雌ねじ部１８Ａ～１８Ｃが形成されている（図９参照）。図９に示すように、雌ねじ部１８Ａ～１８Ｃは、前後方向に間隔をあけて複数（例えば本実施形態では３つ）配置されている。雌ねじ部１８Ａ～１８Ｃは、それぞれ上方に開口している。 The attached portion 17 is recessed lower than the upper surface of the engaging claw 20 at the corner of the seat frame 11 (see FIG. 12). As shown in FIG. 12, the attached portion 17 has substantially the same height as the installation surface of the supported portion 13 (lower end position of the supported portion 13). Female threaded portions 18A to 18C to which bolts 73 (fastening members, see FIG. 13) can be screwed are formed in the attached portion 17 (see FIG. 9). As shown in FIG. 9, a plurality of (for example, three in this embodiment) female threaded portions 18A to 18C are arranged at intervals in the front-rear direction. The female threaded portions 18A to 18C are each open upward.

図４に示すように、杆材１５は、前後方向に延びている。左右一対の杆材１５同士は、座側連結部材１２によって連結されている。左右一対の杆材１５には、張地１０（図１参照）の左右方向の端部が支持されている。伸長状態にある張地１０の端部が杆材１５に脱落不能に支持されることで、張地１０は一対の杆材１５の間に張設されている（図１４参照）。
横杆１６Ａ，１６Ｂは、左右方向に延びている。前後一対の横杆１６Ａ，１６Ｂは、左右一対の杆材１５の前端部同士を連結する第１横杆１６Ａと、左右一対の杆材１５の後端部同士を連結する第２横杆１６Ｂ（幅方向延在部）と、である。前後一対の横杆１６Ａ，１６Ｂには、張地１０（図１参照）の前後方向の端部が支持されている。 As shown in FIG. 4, the rod member 15 extends in the front-rear direction. A pair of left and right rod members 15 are connected to each other by a seat-side connecting member 12 . The pair of left and right rod members 15 support the left and right ends of the upholstery 10 (see FIG. 1). The ends of the stretched fabric 10 are supported by the rods 15 so that the fabric 10 is stretched between the pair of rods 15 (see FIG. 14).
The horizontal rods 16A, 16B extend in the left-right direction. The pair of front and rear horizontal rods 16A and 16B includes a first horizontal rod 16A that connects the front end portions of the pair of left and right rod members 15, and a second horizontal rod 16B that connects the rear end portions of the pair of left and right rod members 15 ( width direction extending portion). The front and rear ends of the upholstery 10 (see FIG. 1) are supported by the pair of front and rear horizontal rods 16A and 16B.

図１０に示すように、杆材１５は、張地１０を係合可能に左右方向の外側に開口する係合溝（以下「第１係合溝１５ａ」ともいう。）を有する。図３に示すように、第１係合溝１５ａは、杆材１５が延びる方向にわたって形成されている。第１係合溝１５ａは、張地１０の周縁部１０ｂが前後方向（杆材１５が延びる方向）に沿って配される範囲全体にわたって形成されている。第１係合溝１５ａは、左右方向から見て被支持部１３とは重ならない範囲で左右方向の外側に開口している。すなわち、杆材１５は、左右方向から見て被支持部１３と重なる部位には第１係合溝１５ａを有しない。 As shown in FIG. 10, the rod member 15 has an engagement groove (hereinafter also referred to as a "first engagement groove 15a") that opens outward in the left-right direction so that the upholstery 10 can be engaged therewith. As shown in FIG. 3, the first engagement groove 15a is formed along the direction in which the rod member 15 extends. The first engaging groove 15a is formed over the entire range in which the peripheral edge portion 10b of the upholstery 10 is arranged along the front-rear direction (the direction in which the rod member 15 extends). The first engagement groove 15a opens outward in the left-right direction within a range that does not overlap with the supported portion 13 when viewed in the left-right direction. That is, the rod member 15 does not have the first engagement groove 15a in the portion overlapping the supported portion 13 when viewed in the left-right direction.

図１０に示すように、杆材１５は、張地１０の端部を係合する係合爪２０と、杆材１５が延びる方向と直交する断面視で係合爪２０よりも断面積が大きい補強部２１と、を備える。例えば、係合爪２０及び補強部２１は、同一の部材（例えば、樹脂部材）で一体に形成されている。 As shown in FIG. 10, the rod member 15 has a larger cross-sectional area than the engaging claw 20 that engages the end of the upholstery 10 and the engaging claw 20 in a cross-sectional view orthogonal to the extending direction of the rod member 15. and a reinforcing portion 21 . For example, the engaging claw 20 and the reinforcing portion 21 are integrally formed of the same member (for example, resin member).

［係合爪］
係合爪２０は、張地１０に対して左右方向の外側へ張力を付与するように左右方向の外側へ向かって突出している（図１４参照）。係合爪２０は、補強部２１の上面から上方に起立する起立部２０ａと、起立部２０ａの上端から左右方向の外側へ向かって突出する突出部２０ｂと、を備える。杆材１５が延びる方向の断面視で、突出部２０ｂの上面は、左右方向の内側に向かうに従って下側に位置するように傾斜している。例えば、図１４に示すように、係合爪２０は、張地１０の左右方向の内側への張力によって、矢印方向への弾性変形を生じる。 [Engaging claw]
The engaging claws 20 protrude outward in the lateral direction so as to apply tension outward in the lateral direction to the upholstery 10 (see FIG. 14). The engaging claw 20 includes an upright portion 20a that rises upward from the upper surface of the reinforcing portion 21, and a protruding portion 20b that protrudes outward in the left-right direction from the upper end of the upright portion 20a. In a cross-sectional view in the direction in which the rod member 15 extends, the upper surface of the projecting portion 20b is inclined so as to be positioned downward toward the inside in the left-right direction. For example, as shown in FIG. 14, the engaging claw 20 is elastically deformed in the direction of the arrow by the tension applied to the upholstery 10 inward in the left-right direction.

［補強部］
補強部２１は、係合爪２０の突出端とは反対側の端部に連結されている。補強部２１は、係合爪２０の起立部２０ａの下端部に連結されている。補強部２１の左右方向の長さは、杆材１５が延びる方向の断面視で係合爪２０の左右方向の長さよりも大きい。補強部２１の上下方向の長さは、杆材１５が延びる方向の断面視で係合爪２０の上下方向の長さよりも大きい。 [Reinforcement part]
The reinforcing portion 21 is connected to the end of the engaging claw 20 opposite to the projecting end. The reinforcing portion 21 is connected to the lower end portion of the upright portion 20 a of the engaging claw 20 . The length of the reinforcing portion 21 in the left-right direction is larger than the length of the engaging claw 20 in the left-right direction in a cross-sectional view in the direction in which the rod member 15 extends. The length of the reinforcing portion 21 in the vertical direction is greater than the length of the engaging claw 20 in the vertical direction in a cross-sectional view in the direction in which the rod member 15 extends.

補強部２１の上面の左右方向の外端は、係合爪２０の突出端よりも左右方向の外側に位置している。補強部２１の左右方向の側面は、断面視で下側に向かうに従って左右方向の内側に位置するように傾斜している。 The left-right outer end of the upper surface of the reinforcing portion 21 is located outside the projecting end of the engaging claw 20 in the left-right direction. The side surface of the reinforcing portion 21 in the left-right direction is inclined so as to be positioned inward in the left-right direction as it goes downward in a cross-sectional view.

補強部２１は、上下方向において係合爪２０よりも大きい厚みを有する厚肉部２２と、上下方向において厚肉部２２よりも小さい厚みを有する板状部２３と、板状部２３から上方に突出するリブ２４Ａ，２４Ｂと、を備える。
厚肉部２２は、補強部２１の左右方向の外側部を構成している。
板状部２３は、厚肉部２２の下端部から左右方向の内側に向かって延びている。 The reinforcing portion 21 includes a thick portion 22 having a thickness larger than that of the engaging claw 20 in the vertical direction, a plate-like portion 23 having a thickness smaller than that of the thick portion 22 in the vertical direction, and a and protruding ribs 24A, 24B.
The thick portion 22 forms an outer portion of the reinforcement portion 21 in the left-right direction.
The plate-like portion 23 extends inward in the left-right direction from the lower end portion of the thick portion 22 .

リブ２４Ａ，２４Ｂは、左右方向に厚みを有する第１リブ２４Ａと、前後方向に厚みを有する第２リブ２４Ｂと、である。第１リブ２４Ａ及び第２リブ２４Ｂの厚みは、板状部２３の厚みと略同じ大きさとすることが好ましい。 The ribs 24A and 24B are a first rib 24A having thickness in the left-right direction and a second rib 24B having thickness in the front-rear direction. It is preferable that the thickness of the first ribs 24A and the second ribs 24B be substantially the same as the thickness of the plate-like portion 23 .

第１リブ２４Ａは、板状部２３の左右方向の中央部から上方に起立している。第１リブ２４Ａは、杆材１５が延びる方向にわたって形成されている。第１リブ２４Ａの高さは、杆材１５が延びる方向にわたって略同じ高さとされている。
第２リブ２４Ｂは、厚肉部２２と第１リブ２４Ａとの間に形成されている。第２リブ２４Ｂは、杆材１５が延びる方向に間隔をあけて複数配置されている。複数の第２リブ２４Ｂの高さは、それぞれ略同じ高さとされている。第２リブ２４Ｂの上部には、内周カバー５０の下方突出部５３Ａ，５３Ｂに対応して窪む凹部２５が形成されている。 The first rib 24A rises upward from the central portion of the plate-like portion 23 in the left-right direction. The first rib 24A is formed along the direction in which the rod member 15 extends. The height of the first rib 24A is substantially the same in the direction in which the rod member 15 extends.
The second rib 24B is formed between the thick portion 22 and the first rib 24A. A plurality of second ribs 24B are arranged at intervals in the direction in which the rod member 15 extends. The heights of the plurality of second ribs 24B are substantially the same. A concave portion 25 is formed in the upper portion of the second rib 24B so as to correspond to the downward protrusions 53A and 53B of the inner peripheral cover 50 .

［被支持部］
図１２に示すように、被支持部１３は、杆材１５から座支持部３７に向かって突出している。被支持部１３は、座枠１１の角部に設けられている（図９参照）。被支持部１３は、左右一対の杆材１５と第２横杆１６Ｂとの連結部に設けられている（図４参照）。被支持部１３は、座２の使用状態で上方に起立している。図３の側面視で、被支持部１３の前後方向の長さは、下側に向かうに従って徐々に大きくなっている。図９の上面視で、被支持部１３の左右方向の長さは、後側に向かうに従って徐々に大きくなっている。被支持部１３は、軸９を挿通可能に左右方向の外側に開口する挿通孔１３ａを有する（図１２参照）。 [Supported part]
As shown in FIG. 12 , the supported portion 13 protrudes from the rod member 15 toward the seat support portion 37 . The supported portion 13 is provided at a corner portion of the seat frame 11 (see FIG. 9). The supported portion 13 is provided at a connecting portion between the pair of left and right rod members 15 and the second horizontal rod 16B (see FIG. 4). The supported portion 13 stands upward when the seat 2 is in use. As viewed from the side in FIG. 3, the length of the supported portion 13 in the front-rear direction gradually increases downward. As viewed from above in FIG. 9, the length of the supported portion 13 in the left-right direction gradually increases toward the rear side. The supported portion 13 has an insertion hole 13a that opens outward in the left-right direction so that the shaft 9 can be inserted therethrough (see FIG. 12).

図１２に示すように、被支持部１３は、アームカバー６０の係合凸部６３を係合可能に左右方向の内側に開口する係合凹部１３ｂを有する。係合凹部１３ｂは、被支持部１３の左右方向の内側面の下部から左右方向の外側に窪んでいる。被支持部１３（係合凹部１３ｂよりも上側の部分）の左右方向の内側面は、下側に向かうに従って左右方向の内側に位置するように傾斜している。 As shown in FIG. 12 , the supported portion 13 has an engaging concave portion 13 b that opens inward in the left-right direction so that the engaging convex portion 63 of the arm cover 60 can be engaged therewith. The engaging recess 13b is recessed outward in the left-right direction from the lower portion of the inner surface of the supported portion 13 in the left-right direction. The inner lateral surface of the supported portion 13 (the portion above the engaging recess 13b) is inclined inward in the lateral direction toward the lower side.

［内周カバー］
図１０に示すように、内周カバー５０は、座枠１１に着脱可能に取り付けられている。図４の上面視で、内周カバー５０は、座枠１１の内周に沿う枠状をなしている。内周カバー５０は、杆材１５の左右方向の内側に配置されている。図１０に示すように、内周カバー５０は、杆材１５の補強部２１を左右方向の内側及び上側から覆っている。内周カバー５０は、補強部２１のリブ２４Ａ，２４Ｂが外部に露出しないように杆材１５を覆っている。内周カバー５０は、杆材１５（係合爪２０）の上面と連続する外面５０ｆを有する。図１０の断面視で、内周カバー５０の外面５０ｆは、左右方向の内側に向かうに従って下側に位置するように傾斜している。 [Inner cover]
As shown in FIG. 10 , the inner peripheral cover 50 is detachably attached to the seat frame 11 . As viewed from above in FIG. 4 , the inner peripheral cover 50 has a frame shape along the inner periphery of the seat frame 11 . The inner peripheral cover 50 is arranged inside the rod member 15 in the left-right direction. As shown in FIG. 10, the inner peripheral cover 50 covers the reinforcing portion 21 of the rod member 15 from the inside and the upper side in the left-right direction. The inner peripheral cover 50 covers the rod member 15 so that the ribs 24A and 24B of the reinforcing portion 21 are not exposed to the outside. The inner peripheral cover 50 has an outer surface 50f that is continuous with the upper surface of the rod member 15 (engaging claw 20). In the cross-sectional view of FIG. 10, the outer surface 50f of the inner peripheral cover 50 is inclined downward toward the inside in the left-right direction.

内周カバー５０は、上下方向に厚みを有する第１覆い部５１と、左右方向に厚みを有する第２覆い部５２と、第１覆い部５１から下方に突出する下方突出部５３Ａ，５３Ｂと、を備える。例えば、第１覆い部５１、第２覆い部５２及び下方突出部５３Ａ，５３Ｂは、同一の部材（例えば、樹脂部材）で一体に形成されている。 The inner peripheral cover 50 includes a first covering portion 51 having a thickness in the vertical direction, a second covering portion 52 having a thickness in the horizontal direction, downward projecting portions 53A and 53B projecting downward from the first covering portion 51, Prepare. For example, the first cover portion 51, the second cover portion 52, and the downward protrusions 53A and 53B are integrally formed of the same member (for example, resin member).

第１覆い部５１は、内周カバー５０の上面を形成している。第１覆い部５１の上面は、係合爪２０の上面と連続している。第１覆い部５１は、断面視で左右方向の内側に向かうに従って下側に位置するように傾斜している。
第２覆い部５２は、内周カバー５０の左右方向の内側面を形成している。第２覆い部５２は、第１覆い部５１の左右方向の内端から板状部２３の左右方向の内端に向かって下方に突出している。 The first cover portion 51 forms the upper surface of the inner peripheral cover 50 . The upper surface of the first cover portion 51 is continuous with the upper surface of the engaging claw 20 . The first cover portion 51 is inclined so as to be positioned downward toward the inner side in the left-right direction in a cross-sectional view.
The second cover portion 52 forms an inner side surface of the inner peripheral cover 50 in the left-right direction. The second cover portion 52 protrudes downward from the left-right direction inner end of the first cover portion 51 toward the left-right direction inner end of the plate-like portion 23 .

下方突出部５３Ａ，５３Ｂは、左右方向に間隔をあけて一対配置されている。一対の下方突出部５３Ａ，５３Ｂは、第１覆い部５１の左右方向の外端部から下方に突出する第１突出部５３Ａと、第１覆い部５１の左右方向の内端部から下方に突出する第２突出部５３Ｂと、である。 A pair of downward protrusions 53A and 53B are arranged with a gap in the left-right direction. The pair of downward projecting portions 53A and 53B are a first projecting portion 53A projecting downward from the laterally outer end of the first cover portion 51 and projecting downwardly from the laterally inner end of the first cover portion 51. and the second projecting portion 53B.

第１突出部５３Ａは、左右方向に厚みを有する。第１突出部５３Ａは、杆材１５が延びる方向にわたって形成されている。第１突出部５３Ａの突出高さは、杆材１５が延びる方向にわたって略同じ高さとされている。
第２突出部５３Ｂは、第１リブ２４Ａよりも左右方向の内側に配置されている。第２突出部５３Ｂは、杆材１５が延びる方向に間隔をあけて複数配置されている。第２突出部５３Ｂの突出高さは、第１突出部５３Ａの突出高さよりも大きい。第２突出部５３Ｂは、杆材１５の凸部１９が係合可能な凹部５４を有する。 53 A of 1st protrusion parts have thickness in the left-right direction. The first projecting portion 53A is formed over the direction in which the rod member 15 extends. The projection height of the first projecting portion 53A is substantially the same in the direction in which the rod member 15 extends.
The second projecting portion 53B is arranged inside the first rib 24A in the left-right direction. A plurality of second projecting portions 53B are arranged at intervals in the direction in which the rod member 15 extends. The protrusion height of the second protrusion 53B is greater than the protrusion height of the first protrusion 53A. The second projecting portion 53B has a recess 54 with which the projecting portion 19 of the rod member 15 can be engaged.

［アームカバー］
図１２に示すように、アームカバー６０は、被支持部１３に着脱可能に取り付けられている。アームカバー６０は、軸９の挿通孔１３ａと重ならないように被支持部１３を覆っている。アームカバー６０は、被支持部１３の前面から被支持部１３の後面にわたって連続する第１カバー部６１と、被支持部１３を左右方向の内方から覆う第２カバー部６２と、を備える（図７参照）。例えば、第１カバー部６１及び第２カバー部６２は、同一の部材（例えば、樹脂部材）で一体に形成されている。 [arm cover]
As shown in FIG. 12 , the arm cover 60 is detachably attached to the supported portion 13 . The arm cover 60 covers the supported portion 13 so as not to overlap the insertion hole 13 a of the shaft 9 . The arm cover 60 includes a first cover portion 61 that continues from the front surface of the supported portion 13 to the rear surface of the supported portion 13, and a second cover portion 62 that covers the supported portion 13 from the inside in the left-right direction ( See Figure 7). For example, the first cover portion 61 and the second cover portion 62 are integrally formed of the same member (for example, resin member).

図３に示すように、第１カバー部６１の前部は、被支持部１３を前方から覆っている。第１カバー部６１の前部下端は、被支持部１３の上下方向の中央近傍に位置している。第１カバー部６１の後部は、被支持部１３を後方から覆っている。第１カバー部６１の後部下端は、第１カバー部６１の前部下端よりも下方に位置している。第１カバー部６１の後部下端は、被支持部１３の下端近傍に位置している。 As shown in FIG. 3, the front portion of the first cover portion 61 covers the supported portion 13 from the front. The lower end of the front portion of the first cover portion 61 is located near the center of the supported portion 13 in the vertical direction. The rear portion of the first cover portion 61 covers the supported portion 13 from behind. The lower end of the rear portion of the first cover portion 61 is located below the lower end of the front portion of the first cover portion 61 . The lower end of the rear portion of the first cover portion 61 is located near the lower end of the supported portion 13 .

図１２に示すように、第２カバー部６２は、第１カバー部６１の左右方向の内端に連結されている。第２カバー部６２は、左右方向に厚みを有する。図７の上面視で、第２カバー部６２は、後側に向かうに従って左右方向の内側に位置するように傾斜している。 As shown in FIG. 12 , the second cover portion 62 is connected to the inner end of the first cover portion 61 in the left-right direction. The second cover portion 62 has a thickness in the left-right direction. When viewed from above in FIG. 7, the second cover portion 62 is inclined so as to be positioned inward in the left-right direction toward the rear side.

図１２に示すように、第２カバー部６２は、被支持部１３の係合凹部１３ｂに係合可能な係合凸部６３を有する。係合凸部６３は、第２カバー部６２の左右方向の外側面（裏面）の下部から左右方向の外側に向かって突出している。係合凸部６３の左右方向の突出高さは、第２カバー６２部と溝形成部材７０との間の間隔Ｗ１よりも小さい。 As shown in FIG. 12 , the second cover portion 62 has an engagement protrusion 63 that can engage with the engagement recess 13 b of the supported portion 13 . The engaging convex portion 63 protrudes outward in the left-right direction from the lower portion of the lateral outer surface (rear surface) of the second cover portion 62 . The protrusion height of the engaging protrusion 63 in the left-right direction is smaller than the interval W1 between the second cover 62 and the groove forming member 70 .

［溝形成部材］
図４に示すように、溝形成部材７０は、杆材１５において被支持部１３と対向する部位に取り付けられている。溝形成部材７０は、被支持部１３よりも左右方向の内側に配置されている。図３に示すように、溝形成部材７０は、被取付部１７（図１１参照）の上面とによって、第１係合溝１５ａと連続する第２係合溝７０ａを形成する。第２係合溝７０ａは、左右方向から見て被支持部１３と重なる範囲を含む範囲で被支持部１３に対して左右方向の内側に設けられ第１係合溝１５ａと連続している（図３参照）。 [Groove forming member]
As shown in FIG. 4 , the groove forming member 70 is attached to a portion of the rod member 15 facing the supported portion 13 . The groove forming member 70 is arranged inside the supported portion 13 in the left-right direction. As shown in FIG. 3, the groove forming member 70 forms a second engaging groove 70a that is continuous with the first engaging groove 15a by the upper surface of the attached portion 17 (see FIG. 11). The second engagement groove 70a is provided inside the supported portion 13 in the left-right direction within a range including a range overlapping with the supported portion 13 when viewed in the left-right direction, and is continuous with the first engagement groove 15a ( See Figure 3).

図８の上面視で、被支持部１３と溝形成部材７０との間には、張地１０の厚み以上の隙間Ｓ１が形成されている。例えば、隙間Ｓ１の大きさは、張地１０の周縁部１０ｂ（周縁部１０ｂの内部に縫着された縁材１４を含む、図１４参照）の厚み以上とされている。 As viewed from above in FIG. 8 , a gap S<b>1 having a thickness equal to or greater than the thickness of the upholstery 10 is formed between the supported portion 13 and the groove forming member 70 . For example, the size of the gap S1 is greater than or equal to the thickness of the peripheral edge portion 10b of the upholstery 10 (including the edge material 14 sewn inside the peripheral edge portion 10b, see FIG. 14).

図７に示すように、溝形成部材７０は、杆材１５の後端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部にわたって設けられている。溝形成部材７０は、杆材１５と第２横杆１６Ｂとの連結部を挟んで杆材１５の後端部及び第２横杆１６Ｂの左右方向の端部に跨って延びている。溝形成部材７０は、杆材１５、第２横杆１６Ｂ及び内周カバー５０の上面と連続する外面７０ｆを有する。 As shown in FIG. 7, the groove forming member 70 is provided over the rear end portion of the rod member 15, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end portion of the second horizontal rod 16B. ing. The groove forming member 70 extends across the rear end portion of the rod member 15 and the left-right end portion of the second horizontal rod 16B across the connecting portion between the rod member 15 and the second horizontal rod 16B. The groove forming member 70 has an outer surface 70f that is continuous with the upper surfaces of the rod member 15, the second horizontal rod 16B, and the inner peripheral cover 50. As shown in FIG.

図１１に示すように、溝形成部材７０は、張地１０の端部を係合する係合鍔７１を備える。係合鍔７１は、張地１０に対して左右方向の外側へ張力を付与するように左右方向の外側へ向かって突出している。係合鍔７１は、係合爪２０と前後方向に連続している（図３参照）。係合鍔７１の下面と、被取付部１７の上面とによって、第１係合溝１５ａと連続する第２係合溝７０ａが形成されている。図１１の断面視で、係合鍔７１の上面は、左右方向の内側に向かうに従って下側に位置するように傾斜している。 As shown in FIG. 11, channel forming member 70 includes engagement collars 71 that engage ends of upholstery 10 . The engaging collar 71 protrudes outward in the lateral direction so as to apply tension to the upholstery 10 outward in the lateral direction. The engagement flange 71 is continuous with the engagement claw 20 in the front-rear direction (see FIG. 3). A second engagement groove 70a that is continuous with the first engagement groove 15a is formed by the lower surface of the engagement flange 71 and the upper surface of the attached portion 17. As shown in FIG. In the cross-sectional view of FIG. 11, the upper surface of the engagement flange 71 is inclined so as to be positioned downward toward the inner side in the left-right direction.

図１３に示すように、溝形成部材７０は、杆材１５の後端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部のそれぞれにボルト７３で固定されている。溝形成部材７０は、ボルト７３の軸部を挿通するための複数（例えば本実施形態では３つ）の挿通孔７２Ａ～７２Ｃを有する（図７参照）。 As shown in FIG. 13, the groove forming member 70 is provided at each of the rear end portion of the rod member 15, the connection portion between the rod member 15 and the second horizontal rod 16B, and the left-right end portion of the second horizontal rod 16B. It is fixed with bolts 73 . The groove forming member 70 has a plurality of (for example, three in this embodiment) insertion holes 72A to 72C through which the shafts of the bolts 73 are inserted (see FIG. 7).

図７に示すように、３つの挿通孔７２Ａ～７２Ｃは、それぞれ同じ方向に開口している。挿通孔７２Ａ～７２Ｃは、溝形成部材７０の上面を上下方向に開口している。３つの挿通孔７２Ａ～７２Ｃは、それぞれ前後方向（溝形成部材７０が延びる方向）に略同じ間隔をあけて配置されている。 As shown in FIG. 7, the three insertion holes 72A-72C open in the same direction. The insertion holes 72A to 72C are open on the upper surface of the groove forming member 70 in the vertical direction. The three insertion holes 72A to 72C are arranged at approximately the same intervals in the front-rear direction (the direction in which the groove forming member 70 extends).

例えば、座枠１１に内周カバー５０を取り付けた後、溝形成部材７０を被取付部１７に載置する。その後、溝形成部材７０の各挿通孔１３ａにボルト７３の軸部を挿通し、被取付部１７の雌ねじ部１８Ａ～１８Ｃ（図９参照）に螺着する。これにより、溝形成部材７０を被取付部１７に取り付けることができる。 For example, after attaching the inner peripheral cover 50 to the seat frame 11 , the groove forming member 70 is placed on the attached portion 17 . After that, the shaft portion of the bolt 73 is inserted through each insertion hole 13a of the groove forming member 70 and screwed into the female screw portions 18A to 18C (see FIG. 9) of the mounting portion 17. As shown in FIG. Thereby, the groove forming member 70 can be attached to the attached portion 17 .

［支持構造体］
図１に示すように、支持構造体３は、左右一対の脚構成部材３０と、左右一対の脚構成部材３０同士を連結する脚側連結部材３１と、を備える。
脚構成部材３０は、前脚部３５と、前脚部３５の後方に位置する後脚部３６と、座２の後方の左右両側部を軸支する座支持部３７と、背凭れ４の左右両端部を支持する背支持部３８と、を備える。 [Support structure]
As shown in FIG. 1 , the support structure 3 includes a pair of left and right leg components 30 and a leg-side connecting member 31 that connects the pair of left and right leg components 30 .
The leg structure member 30 includes a front leg portion 35, a rear leg portion 36 positioned behind the front leg portion 35, a seat support portion 37 pivotally supporting both left and right sides behind the seat 2, and both left and right ends of the backrest 4. a back support 38 for supporting the .

図３の側面視で、前脚部３５は、下側に向かうに従って前方に位置するように傾斜して延びている。
後脚部３６は、下側に向かうに従って後方に位置するように傾斜して延びている。後脚部３６の上下方向の中央近傍には、前脚部３５の後端が連結されている。
前脚部３５及び後脚部３６の下端には、キャスター３９が取り付けられている。 As viewed from the side in FIG. 3, the front leg portion 35 extends obliquely so as to be positioned forward as it goes downward.
The rear leg portion 36 extends obliquely so as to be located rearward as it goes downward. The rear end of the front leg portion 35 is connected to the vicinity of the vertical center of the rear leg portion 36 .
Casters 39 are attached to the lower ends of the front leg portion 35 and the rear leg portion 36 .

座支持部３７は、後脚部３６における前脚部３５の連結位置よりも上方に設けられている。座支持部３７は、後脚部３６から前方に延びている。
図１に示すように、背支持部３８は、後脚部３６の上端から上方に延びている。背支持部３８は、背凭れ４の左右両端部の開口部（不図示）に差し込まれている。背支持部３８は、肘掛け５と共に背凭れ４に側方からねじ止めされている。 The seat support portion 37 is provided above the position where the front leg portion 35 is connected to the rear leg portion 36 . The seat support portion 37 extends forward from the rear leg portion 36 .
As shown in FIG. 1, the back support 38 extends upwardly from the upper ends of the rear legs 36 . The back support portions 38 are inserted into openings (not shown) at both left and right ends of the backrest 4 . The back support part 38 is screwed from the side to the backrest 4 together with the armrests 5 .

［作用効果］
以上説明したように、上記実施形態に係る椅子１は、着座者が着座可能な着座面１０ａを有し弾性変形可能なシート状の張地１０と、左右方向に離間し張地１０が架設される一対の杆材１５と、を有する座２と、左右方向に離間し座２を左右方向に沿う軸９の回りに回動可能に支持する一対の座支持部３７を有する支持構造体３と、を備え、座２は、杆材１５から座支持部３７に向かって突出し軸９の回りに回動可能に支持される被支持部１３を備え、杆材１５は、張地１０を係合可能に左右方向から見て被支持部１３とは重ならない範囲で左右方向の外側に開口する第１係合溝１５ａを有し、座２は、杆材１５において被支持部１３と対向する部位に取り付けられ、左右方向から見て被支持部１３と重なる範囲を含む範囲で被支持部１３に対して左右方向の内側に設けられ第１係合溝１５ａと連続する第２係合溝７０ａを有する溝形成部材７０を備える。 [Effect]
As described above, the chair 1 according to the above embodiment includes an elastically deformable sheet-like upholstery 10 having a seating surface 10a on which a sitter can sit, and the upholstery 10 spaced apart in the left-right direction. a support structure 3 having a pair of seat support portions 37 spaced apart in the left-right direction and supporting the seat 2 so as to be rotatable around an axis 9 extending in the left-right direction; , the seat 2 includes a supported portion 13 that protrudes from a rod 15 toward a seat support portion 37 and is supported so as to be rotatable about a shaft 9 , and the rod 15 engages the upholstery 10 . The seat 2 has a first engagement groove 15a that opens outward in the left-right direction within a range that does not overlap with the supported portion 13 as viewed in the left-right direction. A second engagement groove 70a is provided inside the supported portion 13 in the left-right direction within a range including a range overlapping the supported portion 13 when viewed from the left-right direction, and is continuous with the first engagement groove 15a. a channel forming member 70 having a

この構成によれば、第１係合溝１５ａが左右方向から見て被支持部１３とは重ならない範囲に開口することで、第１係合溝１５ａを開口するための金型の抜き方向に被支持部１３が位置しない。そのため、金型を同一方向にスライドさせることにより、被支持部１３及び第１係合溝１５ａを同じ金型によって一度に成型することができる。したがって、座を容易に成形することができる。
加えて、杆材１５に取り付けられた溝形成部材７０が第１係合溝１５ａと連続する第２係合溝７０ａを形成することにより、張地１０の周縁部１０ｂを第１係合溝１５ａ及び第２係合溝７０ａに沿って係合させることができるため、張地１０を迅速に張設することができる。 According to this configuration, the first engaging groove 15a opens in a range that does not overlap with the supported portion 13 when viewed in the left-right direction. The supported portion 13 is not positioned. Therefore, by sliding the molds in the same direction, the supported portion 13 and the first engaging grooves 15a can be molded at once with the same mold. Therefore, the seat can be easily molded.
In addition, the groove forming member 70 attached to the rod member 15 forms a second engaging groove 70a continuous with the first engaging groove 15a, so that the peripheral edge portion 10b of the upholstery 10 is aligned with the first engaging groove 15a. and the second engagement groove 70a, the upholstery 10 can be quickly stretched.

上記実施形態において、被支持部１３と溝形成部材７０との間には、張地１０の厚み以上の隙間Ｓ１が形成されている。
この構成によれば、被支持部１３と前記溝形成部材７０との間の隙間Ｓ１を、張地１０の周縁部１０ｂを第２係合溝７０ａに係合する際の作業スペースとして利用することができるため、張地１０を迅速に張設することができる。 In the above embodiment, a gap S1 having a thickness equal to or greater than the thickness of the upholstery 10 is formed between the supported portion 13 and the groove forming member 70 .
According to this configuration, the gap S1 between the supported portion 13 and the groove forming member 70 can be used as a working space when the peripheral edge portion 10b of the upholstery 10 is engaged with the second engagement groove 70a. Therefore, the upholstery 10 can be stretched quickly.

上記実施形態において、杆材１５は、左右方向と直交する方向に延びており、座２は、杆材１５が延びる方向における一対の杆材１５の座支持部３７の側の端部同士を連結し左右方向に延びる第２横杆１６Ｂを備え、被支持部１３は、杆材１５と第２横杆１６Ｂとの連結部に設けられている。
この構成によれば、被支持部１３は左右方向に沿う軸９の回りに回動可能に支持されるという機能上、被支持部１３には大きな剛性が要求されるが、被支持部１３が杆材１５と第２横杆１６Ｂとの連結部に設けられることにより、被支持部１３の剛性を確保することができる。 In the above embodiment, the rods 15 extend in a direction perpendicular to the left-right direction, and the seat 2 connects the ends of the pair of rods 15 on the seat support portion 37 side in the direction in which the rods 15 extend. A second horizontal rod 16B extending in the left-right direction is provided, and the supported portion 13 is provided at a connecting portion between the rod member 15 and the second horizontal rod 16B.
According to this configuration, the supported portion 13 is required to have high rigidity because of its function of being rotatably supported around the axis 9 extending in the left-right direction. The rigidity of the supported portion 13 can be ensured by being provided at the connecting portion between the rod member 15 and the second horizontal rod 16B.

上記実施形態において、溝形成部材７０は、杆材１５の座支持部３７の側の端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部にわたって設けられている。
この構成によれば、杆材１５と第２横杆１６Ｂとの連結部は被支持部１３が設けられるという構造上、前記連結部の周辺部には大きな剛性が要求されるが、溝形成部材７０が杆材１５の座支持部３７の側の端部、前記連結部、及び第２横杆１６Ｂの左右方向の端部にわたって設けられることにより、前記連結部の周辺部の剛性を確保することができる。 In the above embodiment, the groove forming member 70 includes the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right direction end of the second horizontal rod 16B. provided throughout the department.
According to this configuration, since the supported portion 13 is provided at the connecting portion between the rod member 15 and the second horizontal rod 16B, a large rigidity is required for the peripheral portion of the connecting portion. 70 is provided over the end of the rod member 15 on the side of the seat support portion 37, the connecting portion, and the left-right end of the second horizontal rod 16B, thereby ensuring the rigidity of the peripheral portion of the connecting portion. can be done.

上記実施形態において、溝形成部材７０は、杆材１５の座支持部３７の側の端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部のそれぞれにボルト７３で固定されている。
この構成によれば、溝形成部材７０を強固に固定することができる。 In the above embodiment, the groove forming member 70 includes the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right direction end of the second horizontal rod 16B. It is fixed with a bolt 73 to each of the parts.
With this configuration, the groove forming member 70 can be firmly fixed.

上記実施形態において、溝形成部材７０は、ボルト７３を挿通するための複数の挿通孔７２Ａ～７２Ｃを有し、複数の挿通孔７２Ａ～７２Ｃは、それぞれ同じ方向に開口している。
この構成によれば、金型を同一方向にスライドさせることにより、複数の挿通孔７２Ａ～７２Ｃを同じ金型によって一度に成型することができる。したがって、溝形成部材７０を容易に成形することができる。 In the above embodiment, the groove forming member 70 has a plurality of insertion holes 72A-72C for inserting the bolts 73, and the plurality of insertion holes 72A-72C are open in the same direction.
According to this configuration, a plurality of insertion holes 72A to 72C can be formed at once by the same mold by sliding the mold in the same direction. Therefore, the groove forming member 70 can be easily molded.

上記実施形態において、座２は、杆材１５及び第２横杆１６Ｂを着座面１０ａの側から覆う内周カバー５０を備え、溝形成部材７０は、杆材１５、第２横杆１６Ｂ及び内周カバー５０の着座面１０ａの側の面と連続する外面７０ｆを有する。
この構成によれば、張地１０の周縁部１０ｂを第２係合溝７０ａに係合する際、張地１０を溝形成部材７０の外面７０ｆに沿わせて引っ張ることができるため、張地１０を迅速に張設することができる。 In the above embodiment, the seat 2 includes the inner peripheral cover 50 that covers the rods 15 and the second horizontal rods 16B from the seating surface 10a side, and the groove forming member 70 includes the rods 15, the second horizontal rods 16B, and the inner peripheral cover 50. It has an outer surface 70f that is continuous with the surface of the peripheral cover 50 on the seating surface 10a side.
According to this configuration, the upholstery 10 can be pulled along the outer surface 70f of the groove forming member 70 when the peripheral edge portion 10b of the upholstery 10 is engaged with the second engaging groove 70a. can be quickly stretched.

［変形例］
以上、図面を参照しながら本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではない。上述した実施形態において示した各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。 [Modification]
Although the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above embodiments. The various shapes, combinations, and the like of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

上記実施形態では、椅子１が設置される面を水平面とした例を挙げて説明したが、これに限らない。例えば、椅子は、水平面に対して傾斜する傾斜面または鉛直面に設置されてもよい。 In the above embodiment, an example in which the surface on which the chair 1 is installed is horizontal has been described, but the present invention is not limited to this. For example, the chair may be placed on an inclined plane or a vertical plane that is inclined with respect to the horizontal plane.

上記実施形態では、杆材１５は、左右方向と直交する方向に延びており、座２は、杆材１５が延びる方向における一対の杆材１５の座支持部３７の側の端部同士を連結し左右方向に延びる第２横杆１６Ｂを備え、被支持部１３は、杆材１５と第２横杆１６Ｂとの連結部に設けられている例を挙げて説明したが、これに限らない。例えば、杆材１５は、左右方向と斜めに交差する方向に延びていてもよい。例えば、被支持部１３は、杆材１５が延びる方向の一部のみに設けられていてもよい。例えば、被支持部１３は、第２横杆１６Ｂが延びる方向の一部のみに設けられていてもよい。 In the above embodiment, the rods 15 extend in a direction perpendicular to the left-right direction, and the seat 2 connects the ends of the pair of rods 15 on the seat support portion 37 side in the direction in which the rods 15 extend. Although an example in which the second horizontal rod 16B extending in the left-right direction is provided and the supported portion 13 is provided at the connecting portion between the rod member 15 and the second horizontal rod 16B has been described, the present invention is not limited to this. For example, the rod member 15 may extend in a direction that obliquely intersects the left-right direction. For example, the supported portion 13 may be provided only partially in the direction in which the rod member 15 extends. For example, the supported portion 13 may be provided only partially in the direction in which the second horizontal rod 16B extends.

上記実施形態では、溝形成部材７０は、杆材１５の座支持部３７の側の端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部にわたって設けられている例を挙げて説明したが、これに限らない。例えば、溝形成部材７０は、杆材１５と第２横杆１６Ｂとの連結部のみに設けられていてもよい。例えば、溝形成部材７０は、杆材１５において被支持部１３と対向する部位に設けられていればよい。 In the above embodiment, the groove forming member 70 includes the end portion of the rod member 15 on the seat support portion 37 side, the connection portion between the rod member 15 and the second horizontal rod 16B, and the left-right direction end of the second horizontal rod 16B. Although the example provided over the part was mentioned and demonstrated, it is not restricted to this. For example, the groove forming member 70 may be provided only at the connecting portion between the rod member 15 and the second horizontal rod 16B. For example, the groove forming member 70 may be provided at a portion of the rod member 15 facing the supported portion 13 .

上記実施形態では、溝形成部材７０は、杆材１５の座支持部３７の側の端部、杆材１５と第２横杆１６Ｂとの連結部、及び第２横杆１６Ｂの左右方向の端部のそれぞれにボルト７３で固定されている例を挙げて説明したが、これに限らない。例えば、溝形成部材７０は、複数のボルト７３で固定されていることに限らず、単一のボルト７３で固定されていてもよい。例えば、溝形成部材７０は、ボルト７３以外の固定部材で固定されていてもよい。 In the above embodiment, the groove forming member 70 includes the end portion of the rod member 15 on the seat support portion 37 side, the connection portion between the rod member 15 and the second horizontal rod 16B, and the left-right direction end of the second horizontal rod 16B. Although the example in which the bolts 73 are fixed to each of the parts has been described, the present invention is not limited to this. For example, the groove forming member 70 may be fixed with a single bolt 73 instead of being fixed with a plurality of bolts 73 . For example, the groove forming member 70 may be fixed by fixing members other than the bolts 73 .

上記実施形態では、溝形成部材７０は、ボルト７３を挿通するための複数の挿通孔７２Ａ～７２Ｃを有し、複数の挿通孔７２Ａ～７２Ｃは、それぞれ同じ方向に開口している例を挙げて説明したが、これに限らない。例えば、複数の挿通孔７２Ａ～７２Ｃは、それぞれ異なる方向に開口していてもよい。 In the above embodiment, the groove forming member 70 has a plurality of insertion holes 72A to 72C for inserting the bolts 73, and the plurality of insertion holes 72A to 72C are open in the same direction. Illustrated, but not limited to. For example, the plurality of insertion holes 72A-72C may open in different directions.

上記実施形態では、座２は、杆材１５及び第２横杆１６Ｂを着座面１０ａの側から覆う内周カバー５０を備え、溝形成部材７０は、杆材１５、第２横杆１６Ｂ及び内周カバー５０の着座面１０ａの側の面と連続する外面７０ｆを有する例を挙げて説明したが、これに限らない。例えば、座２は、内周カバー５０を有しなくてもよい。例えば、溝形成部材７０の外面７０ｆは、杆材１５、第２横杆１６Ｂ及び内周カバー５０の着座面１０ａの側の面と連続していなくてもよい。 In the above embodiment, the seat 2 includes the inner peripheral cover 50 that covers the rods 15 and the second horizontal rods 16B from the seating surface 10a side, and the groove forming member 70 includes the rods 15, the second horizontal rods 16B and the inner Although an example in which the outer surface 70f is continuous with the surface of the peripheral cover 50 on the side of the seating surface 10a has been described, the present invention is not limited to this. For example, the seat 2 may not have the inner peripheral cover 50 . For example, the outer surface 70f of the groove forming member 70 does not have to be continuous with the surfaces of the rod member 15, the second horizontal rod 16B, and the seating surface 10a of the inner peripheral cover 50 side.

１…椅子、２…座、３…支持構造体、９…軸、１０…張地（座面構成部材）、１０ａ…着座面、１３…被支持部、１５…杆材、１５ａ…第１係合溝、１６Ｂ…第２横杆（幅方向延在部）、３７…座支持部、５０…内周カバー（カバー）、７０…溝形成部材、７０ｆ…溝形成部材の外面、７０ａ…第２係合溝、７２Ａ～７２Ｃ…挿通孔、７３…ボルト（締結部材）、Ｓ１…隙間 DESCRIPTION OF SYMBOLS 1... Chair 2... Seat 3... Support structure 9... Shaft 10... Upholstery (seat surface constituent member) 10a... Seating surface 13... Supported part 15... Rod member 15a... First engagement Matching groove 16B Second horizontal rod (extending portion in width direction) 37 Seat support portion 50 Inner circumference cover (cover) 70 Groove forming member 70f Outer surface of groove forming member 70a Second Engagement groove, 72A to 72C... insertion hole, 73... bolt (fastening member), S1... gap

Claims

A seat having an elastically deformable sheet-shaped seat surface forming member having a seating surface on which a seated person can sit, and a pair of rod members spaced apart in the width direction of the chair and on which the seat surface forming member is mounted. ,
a support structure having a pair of seat support portions spaced apart in the width direction and supporting the seat so as to be rotatable about an axis along the width direction;
The seat includes a supported portion that protrudes from the rod member toward the seat support portion and is supported so as to be rotatable about the shaft,
The rod member has a first engagement groove that opens outward in the width direction within a range that does not overlap with the supported portion when viewed in the width direction so that the seat surface forming member can be engaged,
The seat is attached to a portion of the rod member facing the supported portion, and extends inside the supported portion in the width direction within a range including a range overlapping with the supported portion when viewed in the width direction. A chair comprising a groove forming member having a second engagement groove provided and continuous with the first engagement groove.

2. The chair according to claim 1, wherein a gap larger than the thickness of said seat surface forming member is formed between said supported portion and said groove forming member.

The rod member extends in a direction intersecting with the width direction,
The seat further includes a width direction extending portion connecting the ends of the pair of rods on the seat support portion side in the direction in which the rods extend and extending in the width direction,
3. The chair according to claim 1, wherein the supported portion is provided at a connecting portion between the rod member and the widthwise extending portion.

The groove forming member extends over an end portion of the rod member on the side of the seat support portion, a connecting portion between the rod member and the widthwise extending portion, and the widthwise end portion of the widthwise extending portion. 4. A chair according to claim 3, characterized in that a chair is provided.

The groove forming member includes an end portion of the rod member on the side of the seat support portion, a connection portion between the rod member and the widthwise extending portion, and an end portion of the widthwise extending portion in the width direction. 5. The chair according to claim 4, wherein the chairs are fixed to each other by fastening members.

The groove forming member has a plurality of insertion holes for inserting the fastening member,
6. The chair according to claim 5, wherein said plurality of through-holes are open in the same direction.

The seat further includes a cover that covers the rod member and the widthwise extending portion from the seating surface side,
7. The groove forming member according to any one of claims 3 to 6, wherein the groove forming member has an outer surface continuous with the rod member, the widthwise extending portion, and the surface of the cover on the seating surface side. chair.