JP6529155B2 - Chair load support member and chair - Google Patents

Chair load support member and chair Download PDF

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JP6529155B2
JP6529155B2 JP2014217401A JP2014217401A JP6529155B2 JP 6529155 B2 JP6529155 B2 JP 6529155B2 JP 2014217401 A JP2014217401 A JP 2014217401A JP 2014217401 A JP2014217401 A JP 2014217401A JP 6529155 B2 JP6529155 B2 JP 6529155B2
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chair
fitting
fitting recess
front side
recess
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JP2016083114A (en
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益永　浩
浩 益永
奥田　直之
直之 奥田
晶一 井澤
晶一 井澤
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Okamura Corp
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Description

本発明は、椅子用荷重支持部材および椅子に関する。   The present invention relates to a load support member for a chair and a chair.

従来、強度部材としての枠部材に、面直方向からの荷重に対して弾性抵抗力を有する張材が支持されてなる椅子用荷重支持部材、およびこれを備える椅子として、例えば特許文献１、特許文献２に開示されるものがある。これら特許文献１、特許文献２に開示された椅子では、枠部材を構成する杆材の内周空間に面材が支持されている。具体的には、面材が位置する側に開口した溝部に面材が嵌合することにより、枠部材に対して面材が正面側より取り付けられている。このような構造を採用することにより、面材を大きく引き伸ばしたりすることなく、面材を枠部材に容易に取り付けることが可能になる。   Conventionally, as a load supporting member for a chair, in which a tension member having an elastic resistance to a load in a plane perpendicular direction is supported by a frame member as a strength member, and a chair including the same, for example, Patent Document 1, Patent There is one disclosed in Document 2. In the chair disclosed in Patent Document 1 and Patent Document 2, the facing material is supported in the inner circumferential space of the chewing material forming the frame member. Specifically, the face material is attached to the frame member from the front side by fitting the face material in the groove portion opened to the side where the face material is located. By adopting such a structure, it becomes possible to easily attach the facing to the frame member without greatly stretching the facing.

ところで、こうした構造を採用する場合、面材の嵌合強度を大きくするためには、文献２の取付構造に開示されているように、嵌合溝を枠部材の厚さ方向に深くするとともに、面材における嵌合溝への被嵌合部も、これに対応して枠部材の厚さ方向に長いものにするのが望ましい。このような構造を採用することにより、面材の面直方向に荷重が入力された場合に、嵌合溝内で面材の被嵌合部が荷重の入力方向に対して外側へ回動するように変位するので、被嵌合部が嵌合溝により強く接するようになる。   By the way, when adopting such a structure, in order to increase the fitting strength of the face material, as disclosed in the mounting structure of the document 2, while making the fitting groove deeper in the thickness direction of the frame member, It is desirable that the part to be fitted to the fitting groove in the face material be correspondingly longer in the thickness direction of the frame member. By adopting such a structure, when a load is input in a direction perpendicular to the surface of the face material, the fitting portion of the face material rotates outward with respect to the load input direction in the fitting groove. As a result of such displacement, the fitted portion comes in contact with the fitting groove more strongly.

特許第３６８６３０９号公報Patent No. 3686309 gazette 特許第４７３１７５３号公報Patent No. 4731753

しかしながら、特許文献１の取付構造では、嵌合溝の外側端部を形成する立壁が、面材が枠部材に取り付けられ、支持された状態において面材と面一になるように形成されている。そして、この立壁は面材と隙間を生じないように、嵌合溝の手前側に角部を有している。そのため、面材を嵌合溝に嵌合させる作業を行う際に、入り口が狭くなってことから作業が行い難くなっている。   However, in the attachment structure of Patent Document 1, the standing wall forming the outer end of the fitting groove is formed to be flush with the face material in a state where the face material is attached to the frame member and supported. . And this standing wall has a corner on the front side of the fitting groove so as not to form a gap with the face material. Therefore, when the face material is fitted into the fitting groove, the work becomes difficult because the entrance is narrowed.

本発明は前記課題に鑑みてなされたもので、枠部材への面材の取り付けを容易にした椅子用荷重支持部材と、これを備える椅子を提供することを目的とする。   This invention is made in view of the said subject, and it aims at providing the load support member for chairs which made attachment of the face material to a frame member easy, and a chair provided with this.

本発明の椅子用荷重支持部材は、椅子に備えられる椅子用荷重支持部材であって、前記椅子の幅方向に離間して略平行に配置された一対の杆材を備える強度部材としての枠部材と、前記枠部材に支持される面材と、を備え、前記杆材と、前記一対の杆材の互いに対向する内側面側に隙間をあけて配設された支持材と、を有し、前記隙間を前記椅子の正面側へ開口する嵌合凹部とする支持部を備え、前記面材は嵌合凸部を有し、該嵌合凸部が前記支持部の前記嵌合凹部に嵌合することで前記支持部に支持され、前記支持部には、前記嵌合凹部の開口の外周部における、前記椅子の正面側から前記嵌合凹部内に至る部位に、前記椅子の背面側に行くに従って前記嵌合凹部の開口を狭めるように傾斜する移行面が形成され、前記支持材は、取付板によって前記椅子の背面側で前記杆材に取り付けられることで、前記嵌合凹部の開口側が揺動可能に形成された自由端とされ、該自由端における前記椅子の正面側の端部が、前記杆材における前記嵌合凹部を形成する部位の前記椅子の正面側の端部よりも、前記椅子の背面側寄りに位置していることを特徴とする。 The load support member for a chair according to the present invention is a load support member for a chair provided in a chair, and is a frame member as a strength member including a pair of rattan members spaced apart and substantially parallel to each other in the width direction of the chair. When, and a surface material which is supported by the frame member, front has a Ki杆 material, and a support member disposed with a gap on the inner surface side facing each other of the pair of杆材 The support member has a fitting recess that opens the gap toward the front side of the chair, and the face material has a fitting protrusion, and the fitting protrusion fits in the fitting recess of the support. On the back surface side of the chair at a position extending from the front side of the chair to the inside of the fitting recess in the outer peripheral portion of the opening of the fitting recess transition surface which is inclined so as to narrow the opening of the fitting recess is formed toward the support material, the mounting plate The opening side of the fitting recess is a free end formed so as to be pivotable by being attached to the rib on the back side of the chair, and the end on the front side of the chair at the free end is It is located closer to the back side of the chair than the end of the chair on the front side of a portion of the rattan where the fitting recess is to be formed .

この椅子用荷重支持部材によれば、嵌合凹部の開口の外周部における、椅子の正面側から前記嵌合凹部内に至る部位に、椅子の背面側に行くに従って前記嵌合凹部の開口を狭めるように傾斜する移行面を形成したので、面材の嵌合凸部を嵌合凹部に対して正面から直接嵌め入れるだけでなく、例えば嵌合凸部を嵌合凹部の開口よりやや外側から押し入れ、該嵌合凸部を前記移行面の傾斜に沿って滑らせて移動させることにより、嵌合凹部に容易に嵌め入れることができる。したがって、嵌合凹部の開口を実質的に拡げることが可能になり、枠部材への面材の取り付けも容易になる。
また、支持材における嵌合凹部の開口側が揺動可能に形成された自由端とされているので、面材を持った手と逆の手を使って自由端を押し広げることが可能となり、したがって嵌合凹部に面材の嵌合凸部がより嵌め入れやすくなる。また、自由端の正面側の端部が、杆材における嵌合凹部を形成する部位の正面側の端部よりも背面側寄りに位置しているので、前記自由端の端部と杆材の前記正面側の端部との間の段差を埋めるように面材を取り付けることにより、面材と杆材とを、これらが相互に支持された状態において段差なく連続させることが可能になる。 According to this chair load supporting member, the opening of the fitting recess is narrowed from the front side of the chair to the inside of the fitting recess at the outer periphery of the opening of the fitting recess as going to the back side of the chair Since the inclined transition surface is formed, not only the fitting convex portion of the surface material is directly fitted to the fitting concave from the front, but, for example, the fitting convex is pushed from slightly outside the opening of the fitting concave By sliding the fitting projection along the inclination of the transition surface, it can be easily fitted into the fitting recess. Therefore, the opening of the fitting recess can be substantially expanded, and the attachment of the face material to the frame member is also facilitated.
In addition, since the opening side of the fitting recess in the support member is a free end that is formed to be pivotable, it is possible to push and spread the free end using the hand with the face material and the reverse hand. The fitting convex part of the face material can be more easily fitted into the fitting concave part. In addition, since the front end of the free end is positioned closer to the back than the front end of the portion forming the fitting recess in the brazing material, the free end and the brazing material By mounting the facing material so as to fill the difference in level between the end on the front side, it is possible to make the facing material and the brazing material continuous without any difference in level in a state where they are mutually supported.

また、前記椅子用荷重支持部材において、前記嵌合凹部内と前記面材の前記嵌合凸部との間には、互いに係止することで前記嵌合凸部が前記嵌合凹部内から抜け出るのを規制する抜け止め部が設けられていることが好ましい。
この構成によれば、嵌合凹部内と面材の嵌合凸部との間に抜け止め部を設けたので、嵌合凹部内に嵌合凸部を嵌め入れた後、不測の外力が加えられた際などにも嵌合凸部が嵌合凹部内から抜け出ることにより、面材が枠部材から外れてしまうことが防止される。 Further, in the load supporting member for a chair, the fitting convex portion is disengaged from the fitting concave portion by being locked to each other between the inside of the fitting concave portion and the fitting convex portion of the face material. It is preferable that a retaining portion for restricting the movement is provided.
According to this configuration, since the retaining portion is provided between the inside of the fitting recess and the fitting protrusion of the face material, an unexpected external force is applied after the fitting protrusion is fitted into the fitting recess. When the fitting convex portion is pulled out of the fitting concave portion even when being carried out, the face material is prevented from being detached from the frame member.

また、前記椅子用荷重支持部材においては、前記抜け止め部が、前記嵌合凸部の後端に形成された折り返し部と、前記嵌合凹部の最奥部に形成されて前記折り返し部に係止する抜け止め凸部と、によって形成されていることが好ましい。
この構成によれば、折り返し部を嵌合凹部内に押し込むと、折り返し部は抜け止め凸部を乗り越える際に、奥行方向と直交する方向に弾性変形する。そして、抜け止め凸部を乗り越えた後、折り返し部は弾性復帰して抜け止め凸部に係止する。これにより、折り返し部を押し入れるだけで、嵌合凹部への嵌合を完了することができる。また、抜け止め凸部が嵌合凹部の最奥部に形成されているので、折り返し部が正面側に戻り、移行面に沿って嵌合凹部から抜け出ることが防止される。 Further, in the chair load support member, the retaining portion is formed at a turn-back portion formed at the rear end of the fitting convex portion and at a deepest portion of the fitting recess and engaged with the turn-back portion It is preferable that it is formed by the retaining convex part which stops.
According to this configuration, when the folded-back portion is pushed into the fitting recess, the folded-back portion elastically deforms in the direction orthogonal to the depth direction when passing over the retaining convex portion. Then, after passing over the retaining convex portion, the folded-back portion elastically returns and is engaged with the retaining convex portion. Thereby, the fitting to a fitting recessed part can be completed only by pushing in a folding | returning part. Further, since the retaining projection is formed at the deepest portion of the fitting recess, the folded back portion is returned to the front side, and it is prevented from coming out of the fitting recess along the transition surface.

また、前記椅子用荷重支持部材において、前記移行面は、前記嵌合凹部より前記杆材の外側面側に設けられて、前記椅子の正面側で、かつ前記杆材の内側面側に向けて膨出する横断面視弧形に形成されていることが好ましい。
この構成によれば、移行面が内側面側に向けて膨出する弧形に形成されているので、面材の嵌合凸部を移行面に沿って滑らせて嵌合凹部内に移動させる際に、嵌合凸部の滑る動きがよりスムーズになり、したがって面材の取り付けがより容易になる。 Further, in the load support member for a chair, the transition surface is provided on the outer surface side of the rib from the fitting recess, and is directed to the inner surface of the rib on the front side of the chair. It is preferable to form in the cross-sectional view arc shape which bulges.
According to this configuration, the transition surface is formed in an arc shape that bulges toward the inner surface side, so the fitting convex portion of the face material is slid along the transition surface and moved into the fitting recess At the same time, the sliding movement of the fitting projection becomes smoother, and hence the mounting of the facing becomes easier.

また、前記椅子用荷重支持部材において、前記杆材における前記嵌合凹部以外の部位に支持され、前記面材よりも前記椅子の正面側に位置する表側張材を有する外装材を備えることが好ましい。
この構成によれば、面材よりも椅子の正面側に位置する表側張材を有する外装材を備えるので、外装材によって嵌合凹部が遮蔽され、したがって椅子を正面側から見たときに嵌合凹部が視認されるのが防止される。 In the chair load support member, it is preferable that the sheath material includes a covering material supported by a portion other than the fitting recess in the cushion and having a front-side tension member positioned closer to the front of the chair than the facing member. .
According to this configuration, since the exterior material having the front side covering material positioned on the front side of the chair rather than the face material is provided, the fitting recess is shielded by the exterior material, and thus the fitting is viewed when the chair is viewed from the front side It is prevented that the recess is visible.

本発明の椅子は、前記椅子用荷重支持部材を、前記杆材が上下方向に沿って配置される背凭れとして備えることを特徴とする。
この椅子によれば、前記椅子用荷重支持部材を背凭れとしているので、背凭れを組み立てる際に枠部材への面材の取り付けが容易になっており、したがって組立作業性に優れた椅子となる。 The chair according to the present invention is characterized in that the chair load supporting member is provided as a backrest on which the rattan is arranged along the vertical direction.
According to this chair, since the load supporting member for a chair is set back, attachment of the facing to the frame member is easy when assembling the back, and hence the chair is excellent in assembling workability. .

本発明の椅子用荷重支持部材によれば、枠部材への面材の取り付けが容易になる。
本発明の椅子によれば、組立作業性に優れたものとなる。 According to the load support member for a chair of the present invention, attachment of the facing to the frame member is facilitated.
According to the chair of the present invention, the assembling workability is excellent.

本発明に係る椅子の一実施形態の正面側から見た斜視図である。It is the perspective view seen from the front side of one embodiment of the chair concerning the present invention. 本発明に係る椅子の一実施形態の背面側から見た斜視図である。It is the perspective view seen from the back side of one embodiment of the chair concerning the present invention. 本発明に係る椅子用荷重支持部材の一実施形態となる背凭れの分解斜視図である。It is an exploded perspective view of a backrest which becomes one embodiment of a load support member for chairs concerning the present invention. 枠部材の概略構成を示す図であって、（ａ）は正面図、（ｂ）は側面図である。It is a figure which shows schematic structure of a frame member, Comprising: (a) is a front view, (b) is a side view. 図４（ａ）のＡ−Ａ線矢視断面図である。It is an AA line arrow directional cross-sectional view of Fig.4 (a). 図４（ａ）のＢ−Ｂ線矢視要部断面図である。FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4 (a). 張材と張材に設けられる部材の分解斜視図である。It is a disassembled perspective view of the member provided in a tension material and a tension material. 図４（ａ）のＣ−Ｃ線矢視断面図である。It is CC sectional view taken on the line in FIG. 図４（ａ）のＤ−Ｄ線矢視断面図である。It is the DD arrow sectional view taken on the line of FIG. 4 (a).

以下、本発明に係る椅子の実施形態を図面に基づいて詳しく説明する。なお、以下の説明においては、椅子１に正規姿勢で着座した人の正面が向く向きを「前」または「正面」と呼び、それと逆側の向きを「後」または「背面」と呼ぶものとする。また、「上」，「下」と「左」，「右」については、椅子に正規姿勢で着座した人の上方の向きを「上」、それと逆側の向きを「下」と呼び、椅子１に正規姿勢で着座した人の左側の向きを「左」、それと逆側の向きを「右」と呼ぶものとする。すなわち、鉛直方向を上下方向と呼び、水平方向を左右方向と呼ぶ。   Hereinafter, an embodiment of a chair concerning the present invention is described in detail based on a drawing. In the following description, the direction in which the front of a person sitting in a regular posture on the chair 1 is referred to as "front" or "front", and the opposite direction is referred to as "rear" or "back" Do. In addition, for "upper", "lower", "left" and "right", the upper direction of the person sitting in the chair in the normal posture is called "upper" and the opposite direction is called "lower" The left direction of the person sitting in a normal posture at 1 is called "left", and the opposite direction is called "right". That is, the vertical direction is called the vertical direction, and the horizontal direction is called the horizontal direction.

図１は本発明に係る椅子の一実施形態の正面側から見た斜視図、図２は同じく背面側から見た斜視図であり、これらの図において符号１は椅子である。この椅子１は、フロア上に載置される脚部２と、脚部２の上端に設置される支基３と、着座者が着座する座体４と、支基３の上面に取り付けられて座体４を支持する座受部材５と、支基３から後部上方側に延出して座体４に着座した着座者の背中を支持する背凭れ６と、を備えて構成されている。   FIG. 1 is a perspective view seen from the front side of an embodiment of a chair according to the present invention, and FIG. 2 is a perspective view similarly seen from the back side. In these figures, reference numeral 1 is a chair. The chair 1 is attached to a leg 2 placed on the floor, a support base 3 installed at the upper end of the leg 2, a seat 4 on which a seated person sits, and an upper surface of the support base 3 A seat support member 5 for supporting the seat body 4 and a backrest 6 for supporting the back of a seat occupant who has extended from the support base 3 to the rear upper side and is seated on the seat body 4 are configured.

脚部２は、キャスタ７ａ付きの多岐脚７と、多岐脚７の中央部より起立し昇降機構であるガススプリングを内蔵する脚柱８とを備え、脚柱８の上端部に支基３が取り付けられている。支基３には、脚柱８の昇降調整機構と背凭れ６の傾動調整機構とが内蔵されている。   The leg 2 is provided with a multi-leg 7 with a caster 7a and a pedestal 8 which is erected from the central part of the multi-leg 7 and incorporates a gas spring which is an elevating mechanism. It is attached. The support base 3 incorporates a lift adjustment mechanism of the pedestal 8 and a tilt adjustment mechanism of the backrest 6.

背凭れ６は、本発明に係る椅子用荷重支持部材の一実施形態となるもので、背凭れ６の分解斜視図である図３に示すように、椅子１の幅方向（左右方向）に離間して略平行に配置された一対の杆材９、９を備える枠部材１０と、一対の杆材９、９間に架設された面材１１（内装材）と、一対の杆材９、９に被せられた袋状の張材１２（外装材）と、枠部材１０の幅方向両側にそれぞれ取り付けられた肘掛け１３と、を備えて構成されている。   The backrest 6 is an embodiment of the load supporting member for a chair according to the present invention, and as shown in FIG. 3 which is an exploded perspective view of the backrest 6, the backrest 6 is separated in the width direction (left and right direction) of the chair 1. And a frame member 10 having a pair of ribs 9 arranged substantially in parallel, a face 11 (interior material) bridged between the pair of ribs 9 and 9, and a pair of ribs 9 and 9 , And an armrest 13 attached to each side of the frame member 10 in the width direction.

枠部材１０は、その概略構成図である図４（ａ）、（ｂ）に示すように、前記一対の杆材９、９と、これらの下端部（他端部）に一体に設けられた下枠部１４とを有し、一対の杆材９、９の上端部（一端部）に連結フレーム１５が取り付けられたことで構成される。また、本実施形態では、前記したように枠部材１０の幅方向両側、すなわち一対の杆材９、９と下枠部１４との接続部に、それぞれ肘掛け１３が取り付けられている。ただし、本発明に係る椅子用荷重支持部材（背凭れ６）では、枠部材１０に肘掛け１３が取り付けられない構成となっていてもよい。   As shown in FIGS. 4 (a) and 4 (b), which is a schematic view of the frame member 10, the frame member 10 is integrally provided on the pair of wedge members 9 and the lower end (the other end) thereof. The lower frame portion 14 is provided, and the connecting frame 15 is attached to the upper end portion (one end portion) of the pair of wedge members 9 and 9. Further, in the present embodiment, as described above, the armrests 13 are attached to both sides in the width direction of the frame member 10, that is, to the connecting portions between the pair of wedge members 9, 9 and the lower frame portion 14. However, in the chair load support member (backrest 6) according to the present invention, the armrest 13 may not be attached to the frame member 10.

面材１１は、図３に示すように略矩形状に形成されたもので、メッシュ材やエラストマー等からなる面材本体１１ａと、面材本体１１ａの幅方向両側にそれぞれ設けられた側部支持フレーム１１ｂ、１１ｂ（嵌合凸部）と、面材本体１１ａの下端に設けられた下部支持フレーム１１ｃとからなっている。側部支持フレーム１１ｂや下部支持フレーム１１ｃは、縫合等によって面材１１の後方（背面方向）に向けて取り付けられている。面材１１は、側部支持フレーム１１ｂ、１１ｂが図４（ａ）に示す杆材９の側部支持部１６（支持部）に取り付けられて支持され、下部支持フレーム１１ｃが下枠部１４の下部支持部１７に取り付けられて支持されることにより、枠部材１０に固定されている。   The face material 11 is formed in a substantially rectangular shape as shown in FIG. 3, and is provided with a face material main body 11a made of a mesh material, an elastomer or the like, and side supports provided on both sides in the width direction of the face material main body 11a. It consists of frames 11b and 11b (fitting convex part), and lower support frame 11c provided in the lower end of face material main part 11a. The side support frame 11 b and the lower support frame 11 c are attached toward the rear (rear direction) of the face material 11 by stitching or the like. The face material 11 is supported by attaching the side support frames 11 b and 11 b to the side support portion 16 (support portion) of the brazing material 9 shown in FIG. 4A, and the lower support frame 11 c is of the lower frame portion 14. It is fixed to the frame member 10 by being attached to and supported by the lower support portion 17.

側部支持部１６は、一対の杆材９、９の、互いに対向する内側面にそれぞれ設けられており、図４（ａ）のＡ−Ａ線矢視断面図である図５に示すように、杆材９と、該杆材９の内側面側に隙間をあけて該杆材９に沿って配設された細板状の支持材１８とによって形成されている。すなわち、杆材９と支持材１８との間に形成された前記隙間が、面材１１の側部支持フレーム１１ｂを取り付けるための嵌合凹部１９となっている。なお、杆材９と支持材１８との間には、図４（ａ）に示すように支持材１８を杆材９に取り付けるための取付板２０が、これら杆材９および支持材１８の後側（背面側）に設けられている。各取付板２０には、それぞれ取付口２０ａが複数（図４（ａ）では６つ）ずつ、上下方向に略等間隔で設けられている。   The side support portions 16 are respectively provided on the mutually facing inner side surfaces of the pair of wedge members 9 and 9, as shown in FIG. 5 which is a sectional view taken along the line A-A in FIG. And a thin plate-like support 18 disposed along the brazing material 9 with a gap on the inner side surface side of the brazing material 9. That is, the gap formed between the rib 9 and the support 18 is a fitting recess 19 for attaching the side support frame 11 b of the facing 11. Note that, as shown in FIG. 4A, a mounting plate 20 for attaching the support material 18 to the filler material 9 is provided between the filler material 9 and the support material 18 after the filler material 9 and the support material 18. It is provided on the side (rear side). In each mounting plate 20, a plurality of mounting openings 20a (six in FIG. 4A) are provided at substantially equal intervals in the vertical direction.

嵌合凹部１９は、椅子１の前側（正面側）、すなわち着座者の荷重を受ける側（荷重受面側）へ開口しており、図５に示すようにこの嵌合凹部１９内に、面材１１の側部支持フレーム１１ｂが嵌入している。側部支持フレーム１１ｂには、図３に示すようにその後端部に爪部２１が複数（図３では６つ）形成されている。これら爪部２１は、それぞれ前記取付板２０の取付口２０ａに入り込み、図５に示す杆材９の抜け止め凸部２０ｂに係止している。   The fitting recess 19 is open on the front side (front side) of the chair 1, that is, on the side receiving the load of the seated person (load receiving side), and as shown in FIG. The side support frame 11b of the material 11 is inserted. As shown in FIG. 3, a plurality of (six in FIG. 3) claws 21 are formed on the rear end of the side support frame 11b. The claws 21 respectively enter the mounting openings 20a of the mounting plate 20 and are engaged with the retaining projections 20b of the brazing material 9 shown in FIG.

すなわち、爪部２１は、側部支持フレーム１１ｂの後端から後側に突出し、さらに椅子１の幅方向外側に折れ曲がった後、前側に返されて形成されたもので、折り返された部位（折り返し部２１ａ）が杆材９の背面側の最奥部に形成された抜け止め凸部２０ｂに係止することにより、側部支持フレーム１１ｂ（嵌合凸部）が嵌合凹部１９内から抜け出るのが規制されている。つまり、折り返し部２１ａを嵌合凹部１９内に入れると、折り返し部２１ａは抜け止め凸部２０ｂを乗り越える際に、奥行方向と直交する方向に弾性変形する。そして、抜け止め凸部２０ｂを乗り越えた後、折り返し部２１ａは弾性復帰して抜け止め凸部２０ｂに係止する。これにより、折り返し部２１ａを押し入れるだけで、嵌合凹部１９への嵌合を完了することができる。このような側部支持フレーム１１ｂ（嵌合凸部）の後端部に形成された爪部２１の折り返し部２１ａと嵌合凹部１９の最奥部に形成された抜け止め凸部２０ｂとにより、本発明に係る抜け止め部、すなわち互いに係止することで側部支持フレーム１１ｂ（嵌合凸部）が嵌合凹部１９内から抜け出るのを規制する抜け止め部が形成されている。   That is, after the claws 21 project rearward from the rear end of the side support frame 11b and are further bent outward in the width direction of the chair 1, the claws 21 are formed so as to be folded back to the front side. The side support frame 11 b (fitting convex portion) comes out of the fitting concave portion 19 by engaging the portion 21 a) with the retaining convex portion 20 b formed at the deepest portion on the back side of the brazing material 9. Is regulated. That is, when the folded-back portion 21a is inserted into the fitting recess 19, the folded-back portion 21a elastically deforms in the direction orthogonal to the depth direction when crossing over the retaining projection 20b. Then, after passing over the retaining convex portion 20b, the folded back portion 21a elastically returns and is engaged with the retaining convex portion 20b. Thereby, the fitting to the fitting recessed part 19 can be completed only by pushing in the folding | returning part 21a. The folded portion 21a of the claw portion 21 formed at the rear end of such a side support frame 11b (fitting convex portion) and the retaining convex portion 20b formed at the deepest portion of the fitting concave portion 19 The retaining portion according to the present invention, that is, the retaining portion for regulating the side support frame 11 b (the fitting convex portion) from coming out from the inside of the fitting recess 19 by being locked to each other, is formed.

なお、複数の爪部２１は、側部支持フレーム１１ｂが嵌合凹部１９内に嵌め入れられた際に、それぞれ対応する取付口２０ａに嵌め込まれ、折り返し部２１ａが抜け止め凸部２０ｂに係止させられている。   In addition, when the side part support frame 11b is inserted in the fitting recessed part 19, the some nail | claw part 21 is each inserted in the corresponding attachment port 20a, and the folding part 21a is latched by the securing convex part 20b. It is done.

ここで、杆材９の側部支持部１６（支持部）には、嵌合凹部１９の開口の外周部における、椅子１の幅方向外側に、前記側部支持フレーム１１ｂを嵌合凹部１９に案内するための移行面２２が形成されている。移行面２２は、本実施形態では杆材９の正面側（椅子１の正面側）の端部から嵌合凹部１９の開口端に至る部位に形成されたもので、杆材９の後側（椅子１の背面側）に行くに従って嵌合凹部１９の開口を狭めるべく、嵌合凹部１９の開口端に近づくように傾斜して形成されている。本実施形態では、移行面２２は嵌合凹部１９を形成する杆材９の内側面側に設けられて、杆材９の正面側（椅子１の正面側）で、かつ杆材９の内側面側に向けて膨出する横断面視円弧形に形成されている。   Here, the side support portion 11 (support portion) of the rib 9 has the side support frame 11 b in the fitting recess 19 on the outer side of the opening of the fitting recess 19 in the width direction outside of the chair 1. A transition surface 22 is provided for guiding. In the present embodiment, the transition surface 22 is formed at a position from the end of the front side (the front side of the chair 1) of the brazing material 9 to the opening end of the fitting recess 19. In order to narrow the opening of the fitting recess 19 as it goes to the back side of the chair 1, it is formed so as to be closer to the open end of the fitting recess 19. In the present embodiment, the transition surface 22 is provided on the inner surface side of the rib 9 forming the fitting recess 19 and on the front side of the rib 9 (front side of the chair 1) and on the inner surface of the rib 9 It is formed in a cross-sectional view arc shape bulging toward the side.

このような構成のもとに、面材１１の側部支持フレーム１１ｂを嵌合凹部１９内に嵌め入れる際には、例えば側部支持フレーム１１ｂの爪部２１側を嵌合凹部１９の外側の移行面２２に突き当て、その後移行面２２の傾斜に沿って滑らせることにより、この傾斜（移行面２２）に案内させることで側部支持フレーム１１ｂを嵌合凹部１９に容易に嵌め入れることができる。したがって、側部支持フレーム１１ｂを嵌合凹部１９に嵌め入れた後、爪部２１を取付口２０ａ内に入れて折り返し部２１ａを抜け止め凸部２０ｂに係止させることにより、側部支持フレーム１１ｂを側部支持部１６に固定することができる。   Under such a configuration, when the side support frame 11b of the face material 11 is fitted into the fitting recess 19, for example, the claw portion 21 side of the side support frame 11b is outside the fitting recess 19. The side support frame 11b can be easily fitted in the fitting recess 19 by guiding the inclination (transition surface 22) by abutting on the transition surface 22 and then sliding along the inclination of the transition surface 22. it can. Therefore, after the side support frame 11b is fitted into the fitting recess 19, the claw portion 21 is inserted into the mounting opening 20a and the folding portion 21a is locked to the retaining projection 20b, whereby the side support frame 11b is obtained. Can be fixed to the side support 16.

また、前記支持材１８は、嵌合凹部１９の開口側（椅子１の正面側）が揺動可能に形成された自由端（遊端）となっている。これによって側部支持フレーム１１ｂは、嵌合凹部１９に容易に嵌め入れることが可能になっている。すなわち、面材１１を持った手と逆の手を使って自由端（支持材１８）を押し広げ、その状態で側部支持フレーム１１ｂを嵌合凹部１９に嵌め入れることができる。   Further, the support member 18 is a free end (free end) formed so as to be able to swing on the opening side of the fitting recess 19 (the front side of the chair 1). Thus, the side support frame 11 b can be easily fitted into the fitting recess 19. That is, the free end (supporting member 18) can be spread by using the hand holding the face material 11 and the opposite hand, and the side support frame 11b can be fitted into the fitting recess 19 in that state.

さらに、支持材１８の自由端における先端部（椅子１の正面側の端部）は、杆材９における嵌合凹部１９を形成する部位の正面側（椅子１の正面側）の端面（端部）よりも、椅子１の背面側寄りに位置している。これにより、面材１１の位置が杆材９の正面側（荷重受面側）の端部よりも椅子１の背面側に後退する（オフセットされる）ので、面材１１が後述する張材１２の正面側を裏から当接するようになり、張材１２の変形を防止するようになる。また、前記自由端の先端部と杆材９の正面側の端部との間の段差を埋めるように面材１１を取り付けることにより、面材１１と杆材９とを、これらが相互に支持された状態において段差なく連続させることができる。   Furthermore, the tip end (end on the front side of the chair 1) at the free end of the support 18 is the end face (end on the front side (front side of the chair 1) of the part forming the fitting recess 19 in the rib 9 It is located closer to the back side of the chair 1 than). As a result, the position of the face material 11 recedes (is offset) to the back side of the chair 1 more than the end of the front side (the load receiving side) of the brazing material 9, so the face material 11 will be described later. The front surface side of the tension member 12 comes into contact from the back side, and deformation of the tension member 12 is prevented. Further, by attaching the surface material 11 so as to fill the step between the tip end of the free end and the front end of the brazing material 9, the surface material 11 and the brazing material 9 are mutually supported. It can be made to be continuous without a level difference in the state which was carried out.

また、図３に示すように下部支持フレーム１１ｃにも爪部２３が形成されており、この爪部２３が下枠部１４の下部支持部１７における取付口２４に嵌め入れることにより、下部支持フレーム１１ｃが下部枠１４に固定されている。すなわち、下部支持フレーム１１ｃの爪部２３と下部支持部１７の取付口２４との間にも、必要に応じて前記した爪部２１の折り返し部２１ａおよび抜け止め凸部２０ｂと同様の構成からなるに抜け止め部が形成されており、これによって下部支持フレーム１１ｃは下部枠１４に固定されている。このように、側部支持フレーム１１ｂ、１１ｂと下部支持フレーム１１ｃとが枠部材１０に固定されることにより、面材１１も枠部材１０に固定される。   Further, as shown in FIG. 3, the lower support frame 11 c is also formed with the claws 23, and by fitting the claws 23 into the mounting openings 24 of the lower support 17 of the lower frame 14, the lower support frame 11 c is fixed to the lower frame 14. That is, between the claws 23 of the lower support frame 11c and the attachment openings 24 of the lower support 17 as well, the structure is the same as the folded back portion 21a of the claws 21 and the retaining projection 20b described above. The lower support frame 11 c is fixed to the lower frame 14 by the stopper portion formed on the lower support frame 11 c. By fixing the side support frames 11 b and 11 b and the lower support frame 11 c to the frame member 10 as described above, the face material 11 is also fixed to the frame member 10.

枠部材１０に固定された面材１１は、本実施形態では面材本体１１ａが着座者の背中によって加えられる荷重（体重）、すなわち面直方向（面と直交する方向）の荷重を受けて反発する弾性体（弾性抵抗体）となっている。面材本体１１ａは、前記したようにメッシュ材やエラストマーからなることで弾性変形可能に形成されて、面直方向の荷重を受けた際に反発力を発現するように構成されている。なお、側部支持フレーム１１ｂや下部支持フレーム１１ｃは、弾性変形可能な樹脂によって形成されている。   In the present embodiment, the face material 11 fixed to the frame member 10 is repelled by receiving a load (weight) to which the face material main body 11a is applied by the back of the seated person, that is, a load in a plane perpendicular direction (a direction orthogonal to the surface). It becomes an elastic body (elastic resistance body). As described above, the face material main body 11 a is formed to be elastically deformable by being made of a mesh material or an elastomer, and is configured to express a repulsive force when receiving a load in the direction perpendicular to the surface. The side support frame 11b and the lower support frame 11c are formed of an elastically deformable resin.

また、枠部材１０には、その幅方向両側のそれぞれの下端縁側（他端縁側）、すなわち下枠部１４と交差する部位に、幅方向の外側に開口する凹部２５が形成されている。凹部２５は、図４（ａ）のＢ−Ｂ線矢視要部断面図である図６に示すように、杆材９の内部にまで形成されており、本実施形態では該凹部２５の開口を閉塞して、前記肘掛け１３（閉塞部材）が取り付けられている。すなわち、凹部２５内に埋め込まれたナット２６に対して肘掛け１３がボルト２７によって着脱可能に固定されている。   Further, in the frame member 10, concave portions 25 opened to the outer side in the width direction are formed on the lower end side (the other end side) of each of both sides in the width direction, that is, a portion intersecting the lower frame portion 14. The recess 25 is formed to the inside of the brazing material 9 as shown in FIG. 6 which is a cross-sectional view taken along the line B-B in FIG. 4A, and in the present embodiment the opening of the recess 25. And the armrest 13 (closing member) is attached. That is, the armrest 13 is detachably fixed to the nut 26 embedded in the recess 25 by the bolt 27.

なお、この凹部２５内には、後述する張材１２の側部開口を連結する連結板３２が設けられている。また、肘掛け１３には、その内部にボルト２７を取り付けるための貫通孔１３ａが形成されており、この貫通孔１３ａの外側の開口部には、これを閉塞するカバープレート１３ｂが取り付けられている。貫通孔１３ａの外側の開口部は、肘掛け１３が取り付けられる凹部２５と同じ開口形状に形成されているのが好ましい。このように構成とした場合、凹部２５に肘掛け１３を取り付けないときに、凹部２５にカバープレート１３ｂを取り付けることでその開口を閉塞することができる。   In addition, in the recess 25, a connecting plate 32 is provided which connects side openings of the tension member 12 described later. Further, a through hole 13a for attaching a bolt 27 to the inside of the armrest 13 is formed, and a cover plate 13b for closing the through hole 13a is attached to the opening outside the through hole 13a. The opening on the outside of the through hole 13a is preferably formed in the same opening shape as the recess 25 to which the armrest 13 is attached. In such a configuration, when the armrest 13 is not attached to the recess 25, the opening can be closed by attaching the cover plate 13 b to the recess 25.

張材１２は、図７に示すように椅子１の正面側（荷重受面側）に配置される略矩形状の表側張材２８と、椅子１の背面側（荷重受面の反対側）に配置される略矩形状の裏側張材２９とが袋状に形成されたもので、図１、図２に示したように一対の杆材９、９に被せられている。この張材１２は、図３に示すように表側張材２８と裏側張材２９とが、杆材９の長さ方向における上端縁（一端縁）および幅方向の両方の側端縁にて縫合され、接合されており、これによって長さ方向における下端縁側（他端縁側）に、幅方向に連続する開口部３０を形成している。   The tension member 12 is a substantially rectangular front side tension member 28 disposed on the front side (load receiving surface side) of the chair 1 as shown in FIG. 7 and a back surface side of the chair 1 (opposite to the load receiving surface). The substantially rectangular back side tension member 29 to be disposed is formed in a bag shape, and as shown in FIG. 1 and FIG. As shown in FIG. 3, in this tension member 12, the front side tension member 28 and the back side tension member 29 are sewn at both the upper end edge (one end edge) in the lengthwise direction of the brazing material 9 and the side edges in the width direction. And, thereby, an opening 30 continuous in the width direction is formed on the lower end side (the other end side) in the length direction.

ただし、この張材１２は、図７に示すように表側張材２８と裏側張材２９との両方の側端縁における接合部位３１の、下端縁側の端部３１ａが、側端縁の下端縁よりも側端縁の上端縁寄りに位置させられている。これによって開口部３０は、張材１２の両方の側端縁の下端縁側に開口する側部開口３０ａを有して形成されている。   However, as shown in FIG. 7, the end 31 a of the lower end edge side of the joint portion 31 at the side edge of both the front side tension member 28 and the back side tension member 29 is the lower edge of the side edge It is located closer to the upper end edge of the side end edge than it is. Thus, the opening 30 is formed to have a side opening 30 a that opens to the lower end side of both side edges of the tension member 12.

側部開口３０ａには、図３、図７に示すように、該側部開口３０ａを形成する表側張材２８の下端縁側と裏側張材２９の下端縁側とを連結する連結板３２が設けられている。連結板３２は、張材１２の上端縁側が凸となり、下端縁側が凹となるように長さ方向の中央部でヘ字状に弾性変形させられて、屈曲させられた樹脂等からなる細板であって、図７に示す屈曲部３２ａを挟んだ一方の側が表側張材２８の下端縁側に連結し、他方の側が裏側張材２９の下端縁側に連結している。   As shown in FIG. 3 and FIG. 7, the side opening 30 a is provided with a connecting plate 32 that connects the lower end edge side of the front side tension member 28 forming the side opening 30 a and the lower end edge side of the back side tension member 29. ing. The connecting plate 32 is a thin plate made of a resin or the like which is elastically deformed in a H shape at the central portion in the length direction such that the upper end edge side of the tension member 12 is convex and the lower end edge side is concave. That is, one side sandwiching the bent portion 32a shown in FIG. 7 is connected to the lower end edge side of the front side tension member 28, and the other side is connected to the lower end edge side of the back side tension member 29.

連結板３２は、その長さ方向の中央部に屈曲部３２ａが形成されていることにより、屈曲部３２ａを挟んだ一方の側の長さと他方の長さとが略同一に形成されている。これにより、連結板３２は一方の側の長さが、表側張材２８の側部開口３０ａを形成する部分の長さと略同一とされ、他方の側の長さが、裏側張材２９の側部開口３０ａを形成する部分の長さと略同一とされている。すなわち、連結板３２はその一方の側の長さが、表側張材２８の、前記接合部位３１の下端縁側の端部３１ａから下端縁までの長さと略同一に形成され、他方の側の長さが、裏側張材２９の、前記接合部位３１の下端縁側の端部３１ａから下端縁までの長さと略同一に形成されている。   The connecting plate 32 is formed with the bending portion 32a at the center in the length direction, so that the length on one side of the bending portion 32a and the length on the other side are formed substantially the same. Thus, the length of one side of the connecting plate 32 is substantially the same as the length of the portion forming the side opening 30 a of the front side tension member 28, and the length of the other side is the side of the back side tension member 29. The length is substantially the same as the length of the portion forming the opening 30a. That is, the connecting plate 32 is formed such that the length on one side thereof is substantially the same as the length from the end 31 a of the front side tension member 28 to the lower end edge of the joining portion 31 from the lower end The length of the back side tension member 29 is formed to be substantially the same as the length from the end 31 a on the lower end edge side of the bonding portion 31 to the lower end edge.

表側張材２８や裏側張材２９と連結板３２との連結は、例えば縫合によってなされている。ここで、表側張材２８や裏側張材２９への連結板３２の連結は、例えば以下の手順でなされる。まず、表側張材２８と裏側張材２９とのうちの一方をめくってその裏面側を表に出す。続いて、裏面側を表にした張材の上に連結板３２の一方の側を置き、張材が下、連結板３２が上という状態、すなわち連結板３２を視認できる状態で、連結板３２を張材に対して縫合する。このとき、連結板３２の他方の側（他方の張材に縫合する側）の端部は浮いた状態になっている。次いで、張材を反転させ、以下、前記した一方の張材のときと同様にして、他方の張材の裏面側に連結板３２の他方の側を縫合する。その後、連結板３２に縫合した表側張材２８、裏側張材２９の側部開口３０ａを形成する部分を、図６に示すように連結板３２とともに外側から内側に向けて折り込み、凹部２５内に入れる。これにより、連結板３２を凹部２５の内面に当接させて配置することができる。すなわち、弾性変形により屈曲させた連結板３２を復元させることにより、連結板３２を拡げてその両側を凹部２５の内面に当接させる。なお、連結板３２については弾性変形させることなく屈曲形状に成形してもよい。その場合には、連結板３２を凹部２５に入れた際に、この凹部２５の内面に連結板３２を当接することなく、近接した状態で連結板３２を配置していてもよい。   The connection between the front side tension member 28 and the back side tension member 29 and the connection plate 32 is made, for example, by stitching. Here, the connection of the connecting plate 32 to the front side tension member 28 and the back side tension member 29 is performed, for example, in the following procedure. First, one of the front side lining material 28 and the rear side lining material 29 is turned up to expose its back side. Subsequently, one side of the connection plate 32 is placed on the tension material whose front side is the front side, and the connection plate 32 is in a state where the tension material is down and the connection plate 32 is up, that is, in a state where the connection plate 32 can be viewed Sut on the tension material. At this time, the end of the other side of the connection plate 32 (the side to be sewn to the other tension material) is in a floating state. Then, the tension material is reversed, and the other side of the connecting plate 32 is sewn to the back surface side of the other tension material in the same manner as in the case of the one tension material described above. Thereafter, the portions forming the side openings 30a of the front side tension member 28 and the back side tension member 29 sewn to the connecting plate 32 are folded from the outside to the inside together with the connecting plate 32 as shown in FIG. Put in. Thereby, the connection plate 32 can be disposed in contact with the inner surface of the recess 25. That is, by restoring the connecting plate 32 bent by elastic deformation, the connecting plate 32 is expanded and both sides thereof are brought into contact with the inner surface of the recess 25. The connecting plate 32 may be formed into a bent shape without being elastically deformed. In that case, when the connection plate 32 is inserted into the recess 25, the connection plate 32 may be disposed in a state of being in proximity to the inner surface of the recess 25 without contacting the connection plate 32.

また、図３に示すように張材１２の開口部３０には、表側張材２８の下端部後面に前側背張り芯材３３が取り付けられ、裏側張材２９の下端部前面に後側背張り芯材３４が取り付けられている。これら前側背張り芯材３３、後側背張り芯材３４は、樹脂等によって形成された細板状のもので、表側張材２８あるいは裏側張材２９に縫合等によって取り付けられている。前側背張り芯材３３には、その内面（後面）に複数の係合部（図示せず）が形成されている。これら係合部が下枠１４の下部支持部１７に形成された係合部（図示せず）に係合させられることにより、前側背張り芯材３３は下部支持部１７に取り付けられ、支持されている。また、後側背張り芯材３４には、その内面（前面）に複数の係合部（図示せず）が形成されている。これら係合部が下枠１４の下部支持部１７に形成された係合部（図示せず）に係合させられることにより、後側背張り芯材３４も下部支持部１７に取り付けられ、支持されている。このように前側背張り芯材３３、後側背張り芯材３４が下部支持部１７に取り付けられることにより、袋状の張材１２はその開口部３０が下枠部１４によって閉じられ、したがって該開口部３０が露出しないようになっている。   Further, as shown in FIG. 3, the front back tension core 33 is attached to the back surface of the lower end portion of the front side tension member 28 in the opening 30 of the tension member 12, and the back side back tension is attached to the front surface of the lower end portion A core 34 is attached. The front back tensioning core material 33 and the back side back tensioning core material 34 are thin plate-like ones made of resin or the like, and are attached to the front side tension material 28 or the back side tension material 29 by stitching or the like. The front back tensioning core material 33 has a plurality of engaging portions (not shown) formed on the inner surface (rear surface) thereof. By engaging these engaging portions with engaging portions (not shown) formed on the lower support portion 17 of the lower frame 14, the front back tension core 33 is attached to and supported by the lower support portion 17. ing. Further, on the inner back surface (front surface) of the rear side back tensioning core material 34, a plurality of engaging portions (not shown) are formed. By engaging these engaging portions with engaging portions (not shown) formed on the lower support portion 17 of the lower frame 14, the back side back tension core 34 is also attached to the lower support portion 17, and is supported. It is done. By attaching the front back lining 33 and the rear back lining 34 to the lower support 17, the opening 30 of the bag-like covering 12 is closed by the lower frame 14. The opening 30 is not exposed.

また、張材１２には、その上端縁側（一端縁側）の端縁部（上端縁部）に、椅子１の幅方向における外側端よりやや内側に表側張材２８と裏側張材２９とが接合されてなる余長部３５が形成されている。そして、図４（ｂ）のＣ−Ｃ線矢視断面図である図８に示すように、該余長部３５の前記幅方向における内側には、杆材９を露出させる露出口３６が形成されている。   In addition, in the tension member 12, the front-side tension member 28 and the back-side tension member 29 are joined slightly inward from the outer end in the width direction of the chair 1 at the end edge portion (upper end edge) of the upper end edge side (one end edge side) An extra length portion 35 is formed. Then, as shown in FIG. 8 which is a cross-sectional view taken along the line C-C in FIG. 4 (b), an exposure port 36 for exposing the brazing material 9 is formed inside the excess length portion 35 in the width direction. It is done.

杆材９には、露出口３６側の端部、すなわち上端部に、該露出口３６に連通する開口を有する嵌合穴９ａと、杆材９の長さ方向に突出して前記余長部３５に当接する突縁部９ｂとが形成されている。突縁部９ｂは、本実施形態では嵌合穴９ａを囲む外周部にその周方向全周に亘って連続して環状に形成されている。したがって、この突縁部９ｂは、張材１２の余長部３５だけでなく、露出口３６の外周部全周に当接している。   A fitting hole 9a having an opening communicating with the exposure port 36 at an end on the exposure port 36 side, that is, an upper end, is projected to the length direction of the brazing material 9 and the extra length portion 35 is formed. And a projecting edge 9b that abuts on the lower end of the cover. In the present embodiment, the protruding edge portion 9 b is formed in an annular shape continuously on the entire outer circumferential portion surrounding the fitting hole 9 a in the circumferential direction. Therefore, the projecting edge 9 b abuts not only on the extra length portion 35 of the tension member 12 but also on the entire outer periphery of the exposure port 36.

そして、このように露出口３６に露出するとともに該露出口３６に連通する杆材９の嵌合穴９ａに対して、連結フレーム１５が取り付けられている。連結フレーム１５は、露出口３６を通って嵌合穴９ａに嵌合し、露出口３６を閉塞する閉塞部３７と、図３に示すように一対の閉塞部３７、３７間を連結する連結部３８とを備えたもので、一対の閉塞部３７、３７がそれぞれ対応する杆材９に取り付けられたことにより、一対の杆材９、９間を連結している。   The connecting frame 15 is attached to the fitting hole 9a of the brazing material 9 exposed to the exposed port 36 and communicated with the exposed port 36 as described above. The connection frame 15 is fitted in the fitting hole 9a through the exposure port 36, and a connection portion connecting the closing portion 37 closing the exposure port 36 and the pair of closing portions 37 and 37 as shown in FIG. And 38, and the pair of closing portions 37, 37 are attached to the corresponding wedge members 9, respectively, thereby connecting the pair of wedge members 9, 9 to each other.

閉塞部３７は、図８に示すように露出口３６を通って嵌合穴９ａに嵌合する嵌合突起３７ａと、嵌合突起３７ａの根本側（上端側）に位置して嵌合突起３７ａの外方に拡がる覆い部３７ｂとからなっている。覆い部３７ｂは、嵌合突起３７ａが嵌合穴９ａに嵌合した状態で、張材１２の余長部３５を含む露出口３６の外周部を介して、杆材９の突縁部９ｂに突き当たっている。嵌合突起３７ａは、内部に孔部を有した筒状のもので、後述するように孔部にナットが収容されるようになっている。   As shown in FIG. 8, the closing portion 37 is located on the fitting projection 37 a that fits through the exposure port 36 into the fitting hole 9 a and on the base side (upper end side) of the fitting projection 37 a. And a cover portion 37b extending outward. The covering portion 37b is provided on the projecting edge portion 9b of the rib 9 through the outer peripheral portion of the exposure port 36 including the extra length portion 35 of the tension member 12 in a state where the fitting projection 37a is fitted in the fitting hole 9a. I'm abutted. The fitting protrusion 37a is a tubular member having a hole inside, and a nut is accommodated in the hole as described later.

このような閉塞部３７の杆材９（嵌合穴９ａ）への固定は、図４（ｂ）のＤ−Ｄ線矢視断面図である図９に示すように、杆材９の後側（背面側）から挿通されたビス３９によってなされている。すなわち、杆材９の後側（背面側）に形成されたビス孔（図示せず）を通ってビス３９が嵌合穴９ａ内に挿通される。そして、ビス３９はさらに嵌合穴９ａ内に嵌合した嵌合突起３７ａ内に挿通され、その孔部に収容されたナット４０に螺着される。これにより、嵌合突起３７ａが杆材９の嵌合穴９ａ内にビス止めされ、固定される。   As shown in FIG. 9, which is a cross-sectional view taken along line DD of FIG. 4B, the fixation of the closed portion 37 to the wedge 9 (fitting hole 9a) is performed on the rear side of the wedge 9 It is done by the screw 39 inserted from (rear side). That is, the screw 39 is inserted into the fitting hole 9 a through a screw hole (not shown) formed on the rear side (rear side) of the brazing material 9. Then, the screw 39 is further inserted into the fitting projection 37a fitted in the fitting hole 9a, and screwed to the nut 40 accommodated in the hole. Thereby, the fitting projection 37 a is screwed into the fitting hole 9 a of the wedge member 9 and fixed.

なお、このようなビス止めを含む、連結フレーム１５および張材１２の一対の杆材９、９への取り付けは、以下のようにして行う。
まず、袋状の張材１２に対して図３に示すようにその側部開口３０ａにそれぞれ連結板３２を取り付けておくとともに、表側張材２８に前面背張り芯材３３を、裏側張材２９に後面背張り芯材３４をそれぞれ取り付けておく。ただし、前面背張り芯材３３や後面背張り芯材３４の取付は後で行ってもよい。 The attachment of the connecting frame 15 and the tension member 12 to the pair of brazing materials 9, 9 including such screwing is performed as follows.
First, as shown in FIG. 3, the connecting plate 32 is attached to the side opening 30a of the bag-like stretchable material 12, and the front back tension core material 33 is attached to the front side stretchable material 28, The back surface lining core material 34 is attached to each. However, the front backlining core 33 and the back backlining core 34 may be attached later.

次に、この張材１２の上端縁の露出口３６、３６に、その上方からそれぞれ連結フレーム１５の閉塞部３７の嵌合突起３７ａを挿通し、嵌合突起３７ａを露出口３６、３６から張材１２内に突き出させる。続いて、このように嵌合突起３７ａを露出口３６、３６から突き出させた状態で、張材１２を裏返す。すなわち、嵌合突起３７ａを下側にして裏返した張材１２を上方に引っ張り上げ、この裏返した張材１２内に連結フレーム１５の連結部３８を収容するとともに、嵌合突起３７ａを下端側に突き出させた状態で露出させる。   Next, the fitting projections 37a of the closed portion 37 of the connecting frame 15 are respectively inserted from above the exposed openings 36, 36 at the upper end edge of the tension member 12, and the fitting projections 37a are stretched from the exposed openings 36, 36 Make it project into the material 12. Subsequently, the tension material 12 is turned over in a state in which the fitting projections 37 a are thus protruded from the exposure ports 36, 36. That is, the tension material 12 turned upside down with the fitting projection 37a down is pulled up, and the connecting portion 38 of the connecting frame 15 is accommodated in the everted lining material 12, and the fitting projection 37a is on the lower end side. Make it exposed in the state which made it project.

次いで、下端側に突き出た一対の嵌合突起３７ａをそれぞれ対応する杆材９の嵌合穴９ａに嵌合し、続いて図９に示したように嵌合突起３７ａを杆材９にビス止めする。なお、嵌合突起３７ａを杆材９の嵌合穴９ａに嵌合するに先だって、枠部材１０に対して面材１１を取り付けておく。嵌合突起３７ａを杆材９の嵌合穴９ａに嵌合した際、図８に示すように嵌合突起３７ａが張材１２の露出口３６を通って杆材の嵌合穴９ａに嵌合し、覆い部３７ｂが露出口３６の外周部全周に当接することで余長部３５等を介して杆材９の突縁部９ｂに突き当たるので、杆材９の突縁部９ｂに対して張材１２の余長部３５等が位置合わせされる。これにより、張材１２を大きく引き伸ばした場合でも、露出口３６と杆材９との間の位置ずれが抑制される。   Then, a pair of fitting projections 37a protruding to the lower end side are fitted in the fitting holes 9a of the corresponding wedge members 9 respectively, and then the fitting protrusions 37a are screwed to the wedge members 9 as shown in FIG. Do. Before fitting the fitting projections 37 a into the fitting holes 9 a of the brazing material 9, the face material 11 is attached to the frame member 10. When the fitting projection 37a is fitted in the fitting hole 9a of the brazing material 9, as shown in FIG. 8, the fitting protrusion 37a is fitted in the fitting hole 9a of the brazing material through the exposure port 36 of the tension member 12. And the cover 37b abuts on the entire outer periphery of the exposure opening 36 and abuts on the projecting edge 9b of the brazing material 9 via the extra length 35 etc. The extra-long portion 35 and the like of the tension member 12 are aligned. As a result, even when the tension member 12 is stretched greatly, the positional deviation between the exposure port 36 and the brazing material 9 is suppressed.

このようにして嵌合突起３７ａをビス止めし、連結フレーム１５を一対の杆材９、９に取り付け、固定したら、裏返していた張材１２を元に戻して一対の杆材９、９に被せる。その際、張材２の開口部３０が側部開口３０ａを有しているので、袋状の張材１２の開口を大きく拡げることができ、したがって張材１２を枠部材１０に容易に被せることができる。このようにして裏返していた張材１２を元に戻すことにより、袋状の張材１２は、その開口部３０を通して杆材９、９（枠部材１０）にその長さ方向における一端側（上端側）から被せられた状態となる。したがって、嵌合突起３７ａを固定したビス３９は露出することなく張材１２に隠される。   After the fitting projections 37a are screwed in this way and the connecting frame 15 is attached to the pair of ribs 9, 9, and fixed, the overturned tension member 12 is returned to the original and covered on the pair of ribs 9, 9. . At this time, since the opening 30 of the tension member 2 has the side opening 30 a, the opening of the bag-like tension member 12 can be widely expanded, and therefore the tension member 12 can be easily covered on the frame member 10 Can. Thus, by returning the tension material 12 which has been reversed, the bag-like tension material 12 has one end side (upper end) in the length direction to the brazing material 9, 9 (frame member 10) through the opening 30 Side) is covered. Therefore, the screw 39 fixing the fitting projection 37a is hidden in the tension member 12 without being exposed.

このようにして張材１２を枠部材１０に被せたら、張材１２の側部開口３０ａに取り付けられた連結板３２を図６に示したように枠部材１０の凹部２５内に押し込む。これにより、連結板３２に連結された表側張材２８、裏側張材２９のそれぞれの側部開口３０ａを形成する部位も、凹部２５内に収容される。したがって、この凹部２５に肘掛け１３が取り付けられることにより、張材１２の側部開口３０ａや連結板３２が露出することなく隠される。   Thus, when the tension member 12 is put on the frame member 10, the connecting plate 32 attached to the side opening 30a of the tension member 12 is pushed into the recess 25 of the frame member 10 as shown in FIG. As a result, the portions forming the side openings 30 a of the front side tension member 28 and the back side tension member 29 connected to the connection plate 32 are also accommodated in the recess 25. Therefore, by attaching the armrest 13 to the recess 25, the side opening 30 a of the tension member 12 and the connecting plate 32 are hidden without being exposed.

また、張材１２の開口部３０に取り付けた前側背張り芯材３３および後側背張り芯材３４も、下部支持部１７に取り付ける。これにより、張材１２は枠部材１０に固定される。このようにして固定された張材１２は、本実施形態では着座者の背中によって加えられる荷重（体重）、すなわち面直方向の荷重に対しての反発力が、面材１１の同じ反発力より相対的に小となっている。すなわち、本実施形態では、強度部材としての枠部材１０に取り付けられた面材１１が、着座者の背中によって加えられる荷重（体重）に対して反発する反発体（弾性抵抗体）となっている。これにより、張材１２を構成する表側張材２８および裏側張材２９の素材やデザインなどについては、反発力についての制限がないことから、求められる性状等に基づいて自由に選択される。すなわち、デザイン面等において高い自由度を有する。   In addition, the front back tensioning core material 33 and the back side back tensioning core material 34 attached to the opening 30 of the tension material 12 are also attached to the lower support portion 17. Thereby, the tension member 12 is fixed to the frame member 10. In this embodiment, in the tension member 12 fixed in this manner, the load (body weight) applied by the seater's back, that is, the repulsive force to the load in the direction perpendicular to the surface, is the same repulsive force of the surface material 11. It is relatively small. That is, in the present embodiment, the face material 11 attached to the frame member 10 as the strength member is a repulsion body (elastic resistance body) that repels the load (weight) applied by the back of the seated person . Thereby, since there is no restriction | limiting about a repulsive force about the raw material of the front side tension material 28 which comprises the tension material 12, and the back side tension material 29, etc., it selects freely based on the property etc. which are calculated | required. That is, it has a high degree of freedom in design and the like.

このような構成からなる背凭れ６（椅子用荷重支持部材）は、図３に示す下枠部１４の取付部４１が、図１、図２に示す支基３に取り付けられることにより、椅子１に組み立てられている。また、このようにして背凭れ６が支基３に取り付けられたことにより、張材１２の開口部３０に取り付けた前側背張り芯材３３や後側背張り芯材３４は露出することなく張材１２内に納められる。   The backrest 6 (the load support member for a chair) having such a configuration is attached to the support base 3 shown in FIGS. 1 and 2 by attaching the attachment portion 41 of the lower frame portion 14 shown in FIG. Are assembled. Also, by attaching the backrest 6 to the support base 3 in this manner, the front back tensioning core material 33 and the back side back tensioning core material 34 attached to the opening 30 of the tension material 12 are stretched without being exposed. It is contained in the material 12.

本実施形態の椅子用荷重支持部材（背凭れ６）にあっては、嵌合凹部１９の開口の外周部における、椅子１の正面側から前記嵌合凹部１９の開口端に至る部位に、椅子１の背面側に行くに従って嵌合凹部１９の開口端に近づくように傾斜する移行面２２を形成したので、面材１１の側部支持フレーム１１ｂを嵌合凹部１９に対して正面から直接嵌め入れるだけでなく、側部支持フレーム１１ｂを嵌合凹部１９の開口よりやや外側から押し入れ、該側部支持フレーム１１ｂを前記移行面２２の傾斜に沿って滑らせて移動させることにより、嵌合凹部１９に容易に嵌め入れることができる。したがって、嵌合凹部１９の開口を実質的に拡げることができるため、枠部材１０への面材１１の取り付けを容易にすることができる。   In the chair load supporting member (backrest 6) of the present embodiment, the chair is provided at a portion extending from the front side of the chair 1 to the opening end of the fitting recess 19 in the outer peripheral portion of the opening of the fitting recess 19 Since the transition surface 22 is formed so as to approach the opening end of the fitting recess 19 as it goes to the back side of 1, the side support frame 11b of the face material 11 is directly fitted to the fitting recess 19 from the front Not only that, the side support frame 11b is pushed from the outside of the opening of the fitting recess 19 from the outside slightly, and the side support frame 11b is slid along the slope of the transition surface 22 to move it. Fit easily into the Therefore, since the opening of the fitting recess 19 can be substantially expanded, attachment of the face material 11 to the frame member 10 can be facilitated.

また、嵌合凹部１９内と面材１１の側部支持フレーム１１ｂとの間に抜け止め部を設けたので、嵌合凹部１９内に側部支持フレーム１１ｂを嵌め入れた後、不測の外力が加えられた際などにも側部支持フレーム１１ｂが嵌合凹部１９内から抜け出ることにより、面材１１が枠部材１０から外れてしまうことを防止することができる。
また、前記抜け止め部を、側部支持フレーム１１ｂに形成された折り返し部２１ａと、嵌合凹部１９に形成されて抜け止め凸部２０ｂとによって形成しているので、折り返し部２１ａが抜け止め凸部２０ｂに係止することにより、折り返し部２１ａが嵌合凹部１９から抜け出ることを確実に防止することができる。また、折り返し部２１ａを押し入れるだけで、嵌合凹部１９への嵌合を完了することができる。さらに、抜け止め凸部２０ｂが嵌合凹部１９の最奥部に形成されているので、折り返し部２１ａが正面側に戻り、移行面２２に沿って嵌合凹部１９から抜け出ることを防止することができる。 In addition, since the retaining portion is provided between the inside of the fitting recess 19 and the side support frame 11b of the face material 11, after fitting the side support frame 11b into the fitting recess 19, an unexpected external force When the side support frame 11b is pulled out of the inside of the fitting recess 19 even when it is added, it is possible to prevent the face material 11 from being detached from the frame member 10.
Further, since the retaining portion is formed by the folded portion 21a formed in the side support frame 11b and the retaining convex portion 20b formed in the fitting recess 19, the folded portion 21a is a retaining convex By locking to the portion 20b, the folded portion 21a can be reliably prevented from coming off the fitting recess 19. Moreover, the fitting to the fitting recessed part 19 can be completed only by pushing in the folding | returning part 21a. Furthermore, since the retaining projection 20b is formed at the deepest portion of the fitting recess 19, the folded portion 21a is returned to the front side, and it is possible to prevent the folded portion 19 from coming out from the fitting recess 19 along the transition surface 22. it can.

また、移行面２２が内側面側に向けて膨出する弧形に形成されているので、面材１１の側部支持フレーム１１ｂを移行面２２に沿って滑らせて嵌合凹部１９内に移動させる際に、側部支持フレーム１１ｂの滑る動きをよりスムーズにすることができる。したがって、面材１１の取り付けをより容易にすることができる。   Further, since the transition surface 22 is formed in an arc shape that bulges toward the inner surface side, the side support frame 11b of the face material 11 is slid along the transition surface 22 and moved into the fitting recess 19 In this case, the sliding movement of the side support frame 11b can be made smoother. Therefore, attachment of the face material 11 can be made easier.

また、支持材１８における嵌合凹部１９の開口側が揺動可能に形成された自由端とされているので、面材１１を持った手と逆の手を使って自由端を押し広げることができ、したがって嵌合凹部１９に面材１１の側部支持フレーム１１ｂをより嵌め入れやすくすることができる。また、自由端の正面側の端部が、杆材９における嵌合凹部１９を形成する部位の正面側の端部よりも背面側寄りに位置しているので、前記自由端の端部と杆材９の前記正面側の端部との間の段差を埋めるように面材１１を取り付けることにより、面材１１と杆材９とを、これらが相互に支持された状態において段差なく連続させることができる。   Also, since the opening side of the fitting recess 19 in the support member 18 is a free end formed so as to be able to swing, the free end can be pushed and spread using the hand holding the face material 11 and the opposite hand. Therefore, the side support frame 11b of the face material 11 can be fitted into the fitting recess 19 more easily. Further, since the end on the front side of the free end is positioned closer to the back side than the end on the front side of the portion forming the fitting recess 19 in the brazing material 9, the end of the free end and the end By mounting the face material 11 so as to fill the difference in level between the end of the material 9 and the front side, the surface material 11 and the brazing material 9 can be made to be continuous without any difference in the state that they are mutually supported. Can.

また、面材１１よりも椅子１の正面側に位置する表側張材２８を有する張材１２を備えるので、張材１２によって嵌合凹部１９が遮蔽され、したがって椅子１を正面側から見たときに嵌合凹部１９が視認されるのを防止することができる。   Moreover, since the tension material 12 having the front side tension material 28 positioned on the front side of the chair 1 rather than the facing material 11 is provided, the fitting recess 19 is shielded by the tension material 12 and accordingly the chair 1 is viewed from the front side It is possible to prevent the fitting recess 19 from being visually recognized.

本実施形態の椅子１にあっては、背凭れ６を組み立てる際に枠部材１０への面材１１の取り付けが容易になっており、したがって組立作業性に優れた椅子となる。   In the chair 1 of the present embodiment, when the backrest 6 is assembled, attachment of the face material 11 to the frame member 10 is easy, and therefore, the chair becomes excellent in assembling workability.

なお、本発明は前記実施形態に限定されることなく、本発明の主旨を逸脱しない範囲で種々の変更が可能である。
例えば、前記実施形態では、前側背張り芯材３３や後側背張り芯材３４を介して表側張材２８の下端部、裏側張材２９の下端部をそれぞれ下枠部１４に取り付けるようにしたが、表側張材２８の下端部や裏側張材２９の下端部の下枠部１４への取り付けについては、前側背張り芯材３３や後側背張り芯材３４以外の適宜な部材を用いて行ってもよい。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the embodiment, the lower end portion of the front side tension member 28 and the lower end portion of the back side tension member 29 are respectively attached to the lower frame portion 14 through the front side back tension core material 33 and the rear side back tension core material 34 However, for attachment to the lower frame portion 14 of the lower end portion of the front side tension member 28 and the lower end portion of the back side tension member 29, using appropriate members other than the front side back tension core 33 and the back side back tension core 34 You may go.

また、前記実施形態では、図５に示したように移行面２２を、杆材９の正面側（椅子１の正面側）の端部から嵌合凹部１９の開口端に至る部位に形成したが、本発明はこれに限定されることなく、例えば移行面２２を嵌合凹部１９内にまで形成してもよい。このように形成することで、側部支持フレーム１１ｂ（嵌合凸部）を嵌合凹部１９の奥側まで容易に嵌め入れることができる。また、このように移行面２２を嵌合凹部１９内にまで形成した場合には、杆材９の正面側と嵌合凹部１９の開口端とを、前後方向において同じ面に形成してもよい。   Further, in the above embodiment, as shown in FIG. 5, the transition surface 22 is formed in the region from the end of the front side (the front side of the chair 1) of the brazing material 9 to the opening end of the fitting recess 19. The present invention is not limited to this, for example, the transition surface 22 may be formed in the fitting recess 19. By forming in this manner, the side support frame 11 b (the fitting convex portion) can be easily fitted to the back side of the fitting concave portion 19. When the transition surface 22 is formed in the fitting recess 19 as described above, the front side of the brazing material 9 and the opening end of the fitting recess 19 may be formed on the same surface in the front-rear direction. .

１…椅子、６…背凭れ（椅子用荷重支持部材）、９…杆材、１０…枠部材、１１…面材、１１ｂ…側部支持フレーム（嵌合凸部）、１２…張材（外装材）、１６…側部支持部（支持部）、１８…支持材、１９…嵌合凹部、２０ｂ…抜け止め凸部、２１ａ…折り返し部、２２…移行面、２８…表側張材 DESCRIPTION OF SYMBOLS 1 ... chair, 6 ... backrest (load support member for chairs), 9 ... rib material, 10 ... frame member, 11 ... face material, 11 b ... side support frame (fitting convex part), 12 ... tension material (exterior Material: 16 side part support part (support part) 18 support material 19 fitting concave part 20b retaining convex part 21a folding part 22 transition surface 28 front side tension material

Claims (6)

椅子に備えられる椅子用荷重支持部材であって、
前記椅子の幅方向に離間して略平行に配置された一対の杆材を備える強度部材としての枠部材と、
前記枠部材に支持される面材と、を備え、
前記杆材と、前記一対の杆材の互いに対向する内側面側に隙間をあけて配設された支持材と、を有し、前記隙間を前記椅子の正面側へ開口する嵌合凹部とする支持部を備え、
前記面材は嵌合凸部を有し、該嵌合凸部が前記支持部の前記嵌合凹部に嵌合することで前記支持部に支持され、
前記支持部には、前記嵌合凹部の開口の外周部における、前記椅子の正面側から前記嵌合凹部内に至る部位に、前記椅子の背面側に行くに従って前記嵌合凹部の開口を狭めるように傾斜する移行面が形成され、
前記支持材は、取付板によって前記椅子の背面側で前記杆材に取り付けられることで、前記嵌合凹部の開口側が揺動可能に形成された自由端とされ、
該自由端における前記椅子の正面側の端部が、前記杆材における前記嵌合凹部を形成する部位の前記椅子の正面側の端部よりも、前記椅子の背面側寄りに位置していることを特徴とする椅子用荷重支持部材。 It is a load supporting member for a chair provided in a chair,
A frame member as a strength member comprising a pair of ribs arranged substantially parallel and spaced apart in the width direction of the chair;
And a face material supported by the frame member,
Before Ki杆 member has a support member disposed with a gap on the inner surface side facing each other of the pair of杆材 a fitting recess that opens the gap to the front side of the chair With supporting parts,
The face material has a fitting convex portion, and the fitting convex portion is supported by the support portion by being fitted to the fitting concave portion of the support portion,
The support portion narrows the opening of the fitting recess in a portion extending from the front side of the chair to the inside of the fitting recess in the outer peripheral portion of the opening of the fitting recess as going to the back side of the chair transition surface inclined is formed,
The supporting member is attached to the barb on the back side of the chair by a mounting plate, whereby the opening side of the fitting recess is a free end formed so as to be pivotable.
The front end of the chair at the free end is located closer to the back of the chair than the front end of the chair at a portion forming the fitting recess in the ribbing material A load supporting member for a chair characterized by 前記嵌合凹部内と前記面材の前記嵌合凸部との間には、互いに係止することで前記嵌合凸部が前記嵌合凹部内から抜け出るのを規制する抜け止め部が設けられていることを特徴とする請求項１記載の椅子用荷重支持部材。   A retaining portion is provided between the inside of the fitting recess and the fitting convex portion of the face material, which is engaged with each other to prevent the fitting protrusion from being pulled out of the fitting recess. The load supporting member for a chair according to claim 1, characterized in that: 前記抜け止め部が、前記嵌合凸部の後端に形成された折り返し部と、前記嵌合凹部の最奥部に形成されて前記折り返し部に係止する抜け止め凸部と、によって形成されていることを特徴とする請求項２記載の椅子用荷重支持部材。   The retaining part is formed by a folded back part formed at the rear end of the fitting convex part, and a retaining convex part formed at the deepest part of the fitting concave and engaged with the folded part. The load supporting member for a chair according to claim 2, characterized in that: 前記移行面は、前記嵌合凹部より前記杆材の外側面側に設けられて、前記椅子の正面側で、かつ前記杆材の内側面側に向けて膨出する横断面視弧形に形成されていることを特徴とする請求項１〜３のいずれか一項に記載の椅子用荷重支持部材。   The transition surface is provided on the outer surface side of the rib from the fitting recess, and is formed in a cross-sectional view arc that bulges toward the inner surface of the rib on the front side of the chair. The load supporting member for a chair according to any one of claims 1 to 3, characterized in that 前記杆材における前記嵌合凹部以外の部位に支持され、前記面材よりも前記椅子の正面側に位置する表側張材を有する外装材を備えることを特徴とする請求項１〜４のいずれか一項に記載の椅子用荷重支持部材。 Is supported on a site other than the fitting concave portion in the杆材, claim 1-4, characterized in that it comprises an exterior member having a front side Zhang material than the surface material is provided adjacent the front side of the chair A load support member for a chair according to any one of the preceding claims. 請求項１〜５のいずれか一項に記載の椅子用荷重支持部材を、前記杆材が上下方向に沿って配置される背凭れとして備えることを特徴とする椅子。 A chair comprising the load supporting member for a chair according to any one of claims 1 to 5 as a backrest in which the rattan is arranged along the vertical direction.
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JP3149051B2 (en) * 1994-03-22 2001-03-26 株式会社岡村製作所 Chair shell structure
JP4316748B2 (en) * 1999-11-08 2009-08-19 株式会社岡村製作所 Chair
JP4588265B2 (en) * 2001-08-07 2010-11-24 タカノ株式会社 Membrane member mounting structure
JP5170519B2 (en) * 2007-08-22 2013-03-27 国立大学法人佐賀大学 Posture assistance chair
US8317270B2 (en) * 2010-12-07 2012-11-27 Taiwan Shin Yeh Enterprise Co., Ltd. Backrest device for a chair
JP5855908B2 (en) * 2011-11-04 2016-02-09 株式会社岡村製作所 Chair
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