JP2017217377A - Load bearing member for chair and chair - Google Patents

Load bearing member for chair and chair Download PDF

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JP2017217377A
JP2017217377A JP2016116275A JP2016116275A JP2017217377A JP 2017217377 A JP2017217377 A JP 2017217377A JP 2016116275 A JP2016116275 A JP 2016116275A JP 2016116275 A JP2016116275 A JP 2016116275A JP 2017217377 A JP2017217377 A JP 2017217377A
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chair
plate
load
backrest
housing
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JP6695219B2 (en
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益永　浩
Hiroshi Masunaga
浩 益永
晶一 井澤
Shoichi Izawa
晶一 井澤
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Okamura Corp
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Okamura Corp
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Abstract

PROBLEM TO BE SOLVED: To improve a seating feeling by suppressing a sitter from feeling discomfort when the sitter applies a load to a backrest.SOLUTION: A backrest includes: an upholstery material 71 on which a load bearing surface 71f is formed; a pair of vertical rods 86 to which ends of the upholstery material 71 are attached and that are elastically deformable in response to force applied from the upholstery material 71; lateral side parts 73 of a back rear frame 70B formed along extension directions of the respective vertical rods 86 and disposed at opposite sides of the upholstery material 71 side in the vertical rods 86 so as to be spaced in a perpendicular direction of the load bearing surface 71f; and upper connecting parts 50 for connecting the vertical rods 86 and the lateral side parts 73. The upper connecting parts 50 include: plate-like parts 51 formed along a direction of connecting the vertical rods 86 and the lateral side parts 73 of the back rear frame 70B and along a surface including the extention direction of the vertical rods 86; ribs 52A and 52B extending in the direction crossing the plate-like parts 51; and recessed parts 53 formed at positions different from the ribs 52A and 52B.SELECTED DRAWING: Figure 3

Description

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

例えば、特許文献１、２に記載のように、座面の後部より起立する背凭れ支持フレームの前方に背凭れを備え、この背凭れが、ネット状の張材と、張材の外周部を保持する補強枠とを備えた構成の椅子が知られている。このような構成では、補強枠は、背凭れ支持フレームに対して取付片や係合部を介して強固に支持されている。   For example, as described in Patent Documents 1 and 2, a backrest is provided in front of a backrest support frame that stands up from the rear portion of the seating surface, and this backrest includes a net-like tension member and an outer peripheral portion of the tension member. A chair having a configuration including a reinforcing frame for holding is known. In such a configuration, the reinforcing frame is firmly supported on the back support frame via the attachment piece and the engaging portion.

特許文献１、２に記載のような構成において、着座者による荷重が背凭れに作用すると、補強枠に張設された張材のみが面直方向に変位するのに対し、補強枠や背凭れ支持フレーム等の枠部材自体が着座者の荷重に対して十分に変形せず、着座者の身体に沿って安定的に支持することができなかった。また、着座者の荷重が張材の中心から偏心した位置に作用した場合には、補強枠が着座者の身体に接触して硬さを感じたり、不快に感じたりする可能性があった。   In the configurations described in Patent Documents 1 and 2, when a load by a seated person acts on the backrest, only the tension member stretched on the reinforcement frame is displaced in the direction perpendicular to the reinforcement frame and the backrest. The frame member itself such as the support frame is not sufficiently deformed with respect to the load of the seated person, and cannot be stably supported along the body of the seated person. In addition, when the seated person's load acts at a position eccentric from the center of the tension member, the reinforcing frame may come into contact with the body of the seated person to feel hardness or uncomfortable.

そこで、特許文献３に記載のように、張材と、張り材が取り付けられ張り材から作用する力に応じで弾性変形可能な一対の縦枠部と、を備えた椅子が提案されている。この構成では、着座者からの荷重が張り材に作用すると、弾性変形可能な縦枠部は着座者の背に追従するように大きく後方に変形する。
ところで、この特許文献３に記載された構成においては、一対の縦枠部の上端部どうしは上枠部により連結され、上枠部と縦枠部の下部とが背凭れ後部支持部材により連結支持されている。 Therefore, as described in Patent Document 3, a chair including a tension member and a pair of vertical frame portions to which the tension member is attached and which can be elastically deformed according to a force acting from the tension member has been proposed. In this configuration, when a load from the seated person acts on the tension member, the elastically deformable vertical frame portion is largely deformed rearward so as to follow the back of the seated person.
By the way, in the structure described in this patent document 3, the upper end part of a pair of vertical frame part is connected by the upper frame part, and the upper frame part and the lower part of the vertical frame part are connected and supported by the back support member. Has been.

特許第４１０５９１４号公報Japanese Patent No. 4105914 特許第５１３２９１７号公報Japanese Patent No. 5132919 特開２０１４−７９５１０号公報JP 2014-79510 A

上記従来の技術においては、特許文献１、２に記載の補強枠を、特許文献３に記載の縦枠部のように弾性変形可能な構成にしたとしても、補強枠は、その後方の支持フレームに対して取付片や係合部を介して連結される。
したがって、着座者による荷重が作用した場合、補強枠は、取付片や係合部以外の部分では弾性変形するのに対し、取付片や係合部の部分では弾性変形しにくく、着座者が違和感を感じる場合がある。
本発明は上記実情に鑑みてなされたものであり、着座者が背凭れに荷重をかけたときに違和感を感じることを抑え、着座感を向上することのできる椅子用荷重支持部材及び椅子を提供することを目的とする。 In the above-described conventional technology, even if the reinforcing frame described in Patent Documents 1 and 2 is configured to be elastically deformable like the vertical frame part described in Patent Document 3, the reinforcing frame has a support frame behind it. Are connected to each other via an attachment piece or an engaging portion.
Therefore, when a load is applied by the seated person, the reinforcement frame is elastically deformed at portions other than the mounting piece and the engaging portion, whereas it is difficult to elastically deform at the mounting piece and the engaging portion, and the seated person feels uncomfortable. You may feel
The present invention has been made in view of the above circumstances, and provides a load support member for a chair and a chair capable of suppressing a feeling of discomfort when a seated person applies a load to the backrest and improving the seating feeling. The purpose is to do.

本発明は、上記課題を解決するため、以下の手段を採用する。
この発明に係る椅子用荷重支持部材は、着座者の荷重を受ける荷重支持面が形成された張材と、前記荷重支持面に沿って互いに離間して配置され、前記張材の端部が取り付けられるとともに、前記張材から作用する力に応じて弾性変形可能な一対の杆体と、各前記杆体の延在方向に沿うととともに、前記杆体における前記張材側と反対側に、前記荷重支持面の面直方向に離間して配置された補強杆と、前記杆体と前記補強杆とを連結する連結部と、を備え、前記連結部は、前記杆体と前記補強杆とを結ぶ方向、及び前記杆体の前記延在方向を含む面に沿う板状部と、前記板状部に交差する方向に延びる変形抑制部と、前記変形抑制部とは異なる位置に形成された変形許容部と、を備えることを特徴とする。 The present invention employs the following means in order to solve the above problems.
The load supporting member for a chair according to the present invention is arranged such that a tension material on which a load supporting surface for receiving a load of a seated person is formed, and spaced apart from each other along the load supporting surface, and an end portion of the tension material is attached And a pair of housings that can be elastically deformed in accordance with a force acting from the tension member, along the extending direction of each of the rods, and on the opposite side of the tension member side of the rods, the load support surface And a connecting portion that connects the casing and the reinforcing rod, and the connecting portion connects the casing and the reinforcing rod, and A plate-like portion along a plane including the extending direction of the housing, a deformation suppressing portion extending in a direction intersecting the plate-like portion, and a deformation allowing portion formed at a position different from the deformation suppressing portion. It is characterized by that.

このように構成された椅子用荷重支持部材では、杆体は補強杆と面直方向に離間して配置されている。よって、杆体は、張材から作用する力により、着座者の身体に追従するように弾性変形する。
さらに、杆体と補強杆とを連結する連結部は、板状部の一部に変形抑制部が設けられているので、杆体を強固に支持する一方、変形抑制部とは異なる位置に変形許容部を備えているので、着座者の荷重によって杆体が弾性変形することを許容する。すなわち、連結部は、杆体を支持する所要の強度を確保しつつ、杆体の弾性変形を阻害することを抑えている。
このようにして、着座者が着座して張材の荷重支持面に荷重をかけたときに、杆体自体の硬さを感じて不快感を呈することを抑えることができる。 In the load supporting member for a chair configured as described above, the housing is disposed so as to be separated from the reinforcing rod in the direction perpendicular to the surface. Therefore, the housing is elastically deformed so as to follow the body of the seated person by the force acting from the tension material.
Further, since the connecting portion for connecting the housing and the reinforcing rod is provided with the deformation suppressing portion at a part of the plate-like portion, the deformation allowing portion is provided at a position different from the deformation suppressing portion while firmly supporting the housing. Therefore, the housing is allowed to be elastically deformed by the load of the seated person. In other words, the connecting portion suppresses the hindrance to the elastic deformation of the housing while ensuring the required strength to support the housing.
In this way, when the seated person sits and applies a load to the load support surface of the tension member, it is possible to suppress the feeling of discomfort due to the hardness of the casing itself.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記変形抑制部は、前記杆体と前記補強杆とを結ぶ方向に連続し、前記板状部から前記板状部に交差する方向に突出するリブを有し、前記リブが前記杆体の前記延在方向に間隔をあけて複数設けられ、前記変形許容部は、前記延在方向において互いに隣接する複数の前記リブと前記板状部とに囲まれて形成された凹状部を有するようにしてもよい。
このようにして、連結部は、その側面に、変形抑制部としてのリブと板状部とに囲まれた凹状部を形成することで、杆体には、連結部のリブと板状部とが連結される。したがって、杆体において凹状部に対向する部分は、杆体の補強杆側への弾性変形を許容することができる。 In the chair load support member according to the present invention, in the chair load support member, the deformation suppressing portion is continuous in a direction connecting the casing and the reinforcing rod, and the plate-like portion to the plate-like portion. A plurality of ribs protruding in the extending direction of the housing, and the deformation allowing portion includes a plurality of ribs adjacent to each other in the extending direction. You may make it have a recessed part formed surrounded by the said plate-shaped part.
In this way, the connecting portion is formed with a concave portion surrounded by the rib and the plate-like portion as the deformation suppressing portion on the side surface thereof, so that the rib and the plate-like portion of the connecting portion are formed on the housing. Connected. Therefore, the portion of the housing facing the concave portion can allow elastic deformation of the housing toward the reinforcing rod.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記リブは、前記板状部において前記延在方向の一端と他端とにそれぞれ形成されているようにしてもよい。
このように構成することで、変形抑制部は、板状部において延在方向の一端と他端とで、杆体を強固に支持することができる。 In the chair load support member according to the present invention, the rib may be formed at one end and the other end in the extending direction in the plate-like portion. Good.
By comprising in this way, the deformation | transformation suppression part can support a housing | casing firmly by the one end and the other end of the extension direction in a plate-shaped part.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記凹状部は、前記板状部に対し、他方の前記杆体側に開口するよう形成されているようにしてもよい。
このように構成することで、凹状部が、椅子用荷重支持部材の内方に向かって開口するため、外観が損なわれることを抑えることができる。 The chair load support member according to the present invention may be configured such that, in the chair load support member, the concave portion is formed to open to the other housing side with respect to the plate-like portion. Good.
By comprising in this way, since a recessed part opens toward the inner side of the load support member for chairs, it can suppress that an external appearance is impaired.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記杆体の一部が前記凹状部に対向する部位で切り欠かれ、前記凹状部は前記張材側に開放されているようにしてもよい。
このように、凹状部が張材側に開放されることで、杆体を、より弾性変形しやすくすることができる。 In the chair load support member according to the present invention, in the chair load support member, a part of the housing is cut away at a portion facing the concave portion, and the concave portion is opened to the tension member side. You may be allowed to.
In this way, by opening the concave portion to the tension member side, the housing can be more easily elastically deformed.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記連結部は、前記杆体において前記延在方向に交差する幅方向の一部のみに連結されているようにしてもよい。
このように構成することで、連結部を、杆体の幅方向の一部のみに連結することで、着座者による荷重によって杆体が弾性変形する際、杆体において、連結部が連結されていない幅方向の残部は、容易に弾性変形することができる。これにより、連結部によって杆体の弾性変形を阻害することを、より一層抑えることができる。 In the chair load support member according to the present invention, in the chair load support member, the connection portion may be connected to only a part of the width direction intersecting the extending direction in the housing. Also good.
By configuring in this manner, the connecting portion is connected to only a part of the width direction of the housing, and when the housing is elastically deformed by a load by a seated person, the width direction in which the connecting portion is not connected in the housing. The remaining portion can be easily elastically deformed. Thereby, it can suppress further that the elastic deformation of a housing is inhibited by a connection part.

また、この発明に係る椅子用荷重支持部材は、上記椅子用荷重支持部材において、前記杆体は、前記荷重支持面に沿う板状に形成されているようにしてもよい。
このように構成することで、杆体は荷重支持面に沿う板状に形成されているため、杆体自体が荷重支持面に沿って変形しやすい。 In the chair load support member according to the present invention, in the chair load support member, the casing may be formed in a plate shape along the load support surface.
By configuring in this way, the housing is formed in a plate shape along the load support surface, so that the housing itself is easily deformed along the load support surface.

この発明に係る椅子は、床面に設置される支持構造体と、前記支持構造体に支持された座体及び背凭れと、を備え、前記座体及び前記背凭れの少なくとも一方は、上記したような椅子用荷重支持部材で構成されていることを特徴とする。   The chair according to the present invention includes a support structure installed on a floor surface, a seat body and a backrest supported by the support structure, and at least one of the seat body and the backrest is described above. It is comprised with such a load support member for chairs, It is characterized by the above-mentioned.

このように構成することで、座体及び背凭れの少なくとも一方は、上記したような椅子用荷重支持部材で構成されているため、連結部は、杆体を支持する所要の強度を確保しつつ、杆体の弾性変形を阻害することを抑えている。したがって、着座者が着座して張材の荷重支持面に荷重をかけたときに、杆体自体の硬さを感じて不快感を呈することを抑えることができる。   By configuring in this way, since at least one of the seat body and the backrest is configured by the chair load support member as described above, the connecting portion ensures the required strength to support the housing, Inhibits the elastic deformation of the housing. Therefore, when the seated person is seated and a load is applied to the load support surface of the tension member, it is possible to suppress the feeling of uncomfortable feeling due to the hardness of the casing itself.

また、この発明に係る椅子は、上記椅子において、前記背凭れは、前記椅子用荷重支持部材で構成され、前記背凭れの上部において前記杆体と前記補強杆とを連結する上部連結部と、前記背凭れの下部において前記杆体と前記補強杆とを連結する下部連結部と、を備え、少なくとも前記上部連結部は、前記連結部により形成されているようにしてもよい。
このように構成することで、背凭れの少なくとも上部において、着座者が着座して張材の荷重支持面に荷重をかけたときに、杆体自体の硬さを感じて不快感を呈することを抑えることができる。 Further, the chair according to the present invention is the above chair, wherein the backrest is configured by the load support member for the chair, and the upper connecting portion that connects the case body and the reinforcing rod at the upper part of the backrest, A lower connecting portion that connects the casing and the reinforcing rod at a lower portion of a backrest, and at least the upper connecting portion may be formed by the connecting portion.
By configuring in this way, at least in the upper part of the backrest, when a seated person sits and applies a load to the load support surface of the tension member, it is possible to suppress the body itself from feeling uncomfortable due to its hardness. be able to.

この発明に係る椅子用荷重支持部材及び椅子によれば、着座者が背凭れに荷重をかけたときに違和感を感じることを抑え、着座感を向上することができる。   According to the chair load supporting member and the chair according to the present invention, it is possible to suppress a feeling of discomfort when the seated person applies a load to the backrest and to improve the seating feeling.

本発明の一実施形態に係る椅子を側方から見た斜視図である。It is the perspective view which looked at the chair concerning one embodiment of the present invention from the side. 本発明の一実施形態に係る椅子を後方（背凭れ側）から見た斜視図である。It is the perspective view which looked at the chair which concerns on one Embodiment of this invention from back (backrest side). 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 上部連結部を、背凭れの後方かつ幅方向外側から見た斜視図である。It is the perspective view which looked at the upper connection part from the back and the width direction outer side of the backrest. 上部連結部を、背凭れの後方かつ幅方向内側から見た斜視図である。It is the perspective view which looked at the upper connection part from the back and the width direction inner side of the backrest. 下部連結部を、背凭れの後方かつ幅方向内側から見た斜視図である。It is the perspective view which looked at the lower connection part from the back and the width direction inner side of the backrest.

以下、本発明の一実施形態に係る椅子について、図面を参照して説明する。
図１は、本発明の一実施形態に係る椅子を側方から見た斜視図である。図２は、本発明の一実施形態に係る椅子を後方（背凭れ側）から見た斜視図である。 Hereinafter, a chair according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair according to an embodiment of the present invention as viewed from the side. FIG. 2 is a perspective view of a chair according to an embodiment of the present invention as viewed from the back (backrest side).

この図１及び図２に示すように、椅子１００は、床面Ｆ上に設置される脚部１と、脚部１の上部に設置される不図示のボックス状の支基２と、支基２の上部に取り付けられた座受け部材３と、座受け部材３にスライド可能に支持され着座者が着座する座体４と、支基２から延び座体４に着座した着座者の背中を支持する背凭れ（椅子用荷重支持部材）７と、を備えている。
以下の説明において、便宜上、座体４に着座した着座者が前を向く方向を「前方」、その反対方向を「後方」と称する。また、椅子１００が設置される床面Ｆ側とその反対側を結ぶ方向を「上下方向」と称する。また、椅子１００の幅方向、つまり前後方向と直交する水平方向を「幅方向」と称する。また、図中において、前方を矢印ＦＲで示し、上方を矢印ＵＰで示し、幅方向の左方を矢印ＬＨで示す。 As shown in FIGS. 1 and 2, the chair 100 includes a leg 1 installed on the floor F, a box-like support base 2 (not shown) installed on the top of the leg 1, and a support base. 2, a seat 4 that is slidably supported by the seat 3, and a seat 4 on which the seated person sits, and a back of the seated person 4 that extends from the support base 2 and sits on the seat 4. The backrest (chair load support member) 7 is provided.
In the following description, for the sake of convenience, the direction in which the seated person sitting on the seat 4 faces forward is referred to as “front”, and the opposite direction is referred to as “rear”. The direction connecting the floor F side on which the chair 100 is installed and the opposite side is referred to as “vertical direction”. The width direction of the chair 100, that is, the horizontal direction orthogonal to the front-rear direction is referred to as the “width direction”. In the drawing, the front is indicated by an arrow FR, the upper side is indicated by an arrow UP, and the left side in the width direction is indicated by an arrow LH.

脚部１は、キャスタ１１Ａ付きの多岐脚１１と、多岐脚１１の中央部より起立し昇降機構であるガススプリング（不図示）を内蔵する脚柱１２と、を有している。   The leg portion 1 includes a multi-leg 11 with casters 11A and a pedestal column 12 that stands up from the center of the multi-leg 11 and incorporates a gas spring (not shown) that is a lifting mechanism.

脚柱１２の下部を構成する外筒１３は、多岐脚１１に回転不能に嵌合して支持されている。脚柱１２の上部を構成する内筒１４は、上端部に支基２を固定して支持するとともに、下部が外筒１３に水平方向で回転可能に支持されている。   The outer cylinder 13 constituting the lower part of the pedestal 12 is fitted to and supported by the manifold 11 so as not to rotate. The inner cylinder 14 constituting the upper portion of the pedestal 12 is supported by fixing the support base 2 to the upper end portion, and the lower portion is supported by the outer cylinder 13 so as to be rotatable in the horizontal direction.

支基２には、脚柱１２の昇降調整機構と背凭れ７の傾動調整機構が内蔵されている。   The support base 2 incorporates an elevation adjustment mechanism for the pedestal 12 and a tilt adjustment mechanism for the backrest 7.

座受け部材３は、支基２の上部に取り付けられた４本のリンクアーム（不図示。以下同じ。）と、リンクアームどうしを連結する左右一対の固定フレーム（不図示。以下同じ。）と、を有している。
本実施形態では、脚部１、支基２及び座受け部材３が支持構造体３０を構成している。 The seat receiving member 3 includes four link arms (not shown, the same applies hereinafter) attached to the upper portion of the support base 2 and a pair of left and right fixed frames (not shown, the same applies hereinafter) that connect the link arms. ,have.
In the present embodiment, the leg 1, the support base 2, and the seat receiving member 3 constitute a support structure 30.

座体４は、座フレーム４０と、座フレーム４０に張設された張材４１と、を有している。張材４１の上面は、着座者の荷重を受ける荷重支持面４１ｆとされている。   The seat body 4 includes a seat frame 40 and a tension member 41 stretched on the seat frame 40. The upper surface of the tension member 41 is a load support surface 41f that receives the load of the seated person.

背凭れ７は、背フレーム７０と、背フレーム７０に張設された張材７１と、を有している。張材７１の前面は、着座者の荷重を受ける荷重支持面７１ｆとされている。   The backrest 7 has a back frame 70 and a tension member 71 stretched on the back frame 70. The front surface of the tension member 71 is a load support surface 71f that receives the load of the seated person.

背フレーム７０は、支基２に連結され、背フレーム７０の強度を担う強度部材である背後枠７０Ｂと、背後枠７０Ｂの前方に設けられた背前枠８０Ｆと、を有している。   The back frame 70 is connected to the support base 2 and includes a back frame 70B that is a strength member that bears the strength of the back frame 70, and a back front frame 80F provided in front of the back frame 70B.

背後枠７０Ｂは、下辺部７２と、側辺部（補強杆）７３と、上辺部７４と、を有している。下辺部７２と側辺部７３と上辺部７４とは、例えばアルミ等の金属または所定の強度を有する樹脂等により一体に形成されている。   The back frame 70 </ b> B has a lower side portion 72, a side side portion (reinforcing rod) 73, and an upper side portion 74. The lower side portion 72, the side side portion 73, and the upper side portion 74 are integrally formed of a metal such as aluminum or a resin having a predetermined strength, for example.

下辺部７２は、支基２内の傾動調整機構に連結され、支基２の後部の左右両側から延びている。下辺部７２は、上方に向かうにしたがって次第に後方に向かって傾斜されている。また、各下辺部７２には、座体４の側方に配置される肘掛け７５が設けられている。   The lower side portion 72 is connected to the tilt adjustment mechanism in the support base 2 and extends from the left and right sides of the rear portion of the support base 2. The lower side portion 72 is gradually inclined rearward as it goes upward. Each lower side portion 72 is provided with an armrest 75 disposed on the side of the seat body 4.

各下辺部７２の上端部には、側辺部７３が連続して形成されている。各側辺部７３は、上方に向かうにしたがって次第に幅方向の外側に向かって傾斜している。   A side portion 73 is formed continuously at the upper end portion of each lower side portion 72. Each side part 73 inclines toward the outer side of the width direction gradually as it goes upwards.

側辺部７３の下部７３ａは、上方に向かうにしたがって次第に前方に向かって傾斜している。側辺部７３の上部７３ｂは、上方に向かうにしたがって次第に後方に向かって傾斜している。各側辺部７３の上部どうしは、上辺部７４で連結されている。   The lower part 73a of the side part 73 is gradually inclined forward as it goes upward. The upper part 73b of the side part 73 is gradually inclined backward as it goes upward. The upper portions of the side portions 73 are connected by an upper side portion 74.

背前枠８０Ｆは、幅方向に（荷重支持面に沿って）離間して配置された一対の縦杆（補強杆）８６と、一対の縦杆８６の上端どうしを連結する上杆８７と、を有している。縦杆８６及び上杆８７は、例えば樹脂等で一体として形成されている。縦杆８６及び上杆８７は、張材７１から作用する力に応じて弾性変形可能に構成されている。   The back frame 80F includes a pair of vertical rods (reinforcing rods) 86 that are spaced apart in the width direction (along the load support surface), and an upper rod 87 that connects the upper ends of the pair of vertical rods 86; have. The vertical rod 86 and the upper rod 87 are integrally formed of resin or the like, for example. The vertical rod 86 and the upper rod 87 are configured to be elastically deformable in accordance with the force acting from the tension material 71.

図２に示すように、各縦杆８６は、上下方向に沿って延びている。詳細には、縦杆８６は、下方に向かうにしたがって次第に幅方向の内側に向かって傾斜している。一対の縦杆８６の下端どうしは、Ｕ字状の連結部８９を介して互いに連結されている。   As shown in FIG. 2, each vertical rod 86 extends along the vertical direction. Specifically, the vertical rod 86 is gradually inclined inward in the width direction as it goes downward. The lower ends of the pair of vertical rods 86 are connected to each other via a U-shaped connecting portion 89.

図３は、図２のＡ−Ａ断面図である。図４は、図２のＢ−Ｂ断面図である。
図３及び図４に示すように、縦杆８６は、荷重支持面７１ｆと直交する面直方向に沿った断面（幅方向に沿った水平断面）において、荷重支持面７１ｆに沿うとともに幅方向に幅広な板状をなしている。 FIG. 3 is a cross-sectional view taken along the line AA of FIG. 4 is a cross-sectional view taken along line BB in FIG.
As shown in FIGS. 3 and 4, the vertical rod 86 is along the load support surface 71f and in the width direction in a cross section (horizontal cross section along the width direction) along the plane perpendicular to the load support surface 71f. It has a wide plate shape.

縦杆８６は、その幅方向の内側の端部８６Ｊ側に向かうにしたがって、面直方向の厚みが薄くなるように形成されている。   The vertical rod 86 is formed so that the thickness in the perpendicular direction becomes thinner toward the inner end 86J side in the width direction.

縦杆８６の幅方向の外側の端部８６Ｋには、内方に向かって凹む溝８８が形成されている。溝８８に、張材７１の端部７１ｅが巻き込まれている。   A groove 88 that is recessed inward is formed at an outer end 86 </ b> K in the width direction of the vertical rod 86. The end portion 71 e of the upholstery material 71 is caught in the groove 88.

図１に示すように、背前枠８０Ｆの各縦杆８６の上部と下部には、それぞれ、後方に向かって延びる上部連結部（連結部）５０と、側辺部７３の下部に連結された下部連結部（連結部）６０と、が一体に形成されている。上部連結部５０及び下部連結部６０は、背前枠８０Ｆの各縦杆８６と背後枠７０Ｂの側辺部７３とを連結する。   As shown in FIG. 1, the upper and lower portions of each vertical rod 86 of the anterior frame 80 </ b> F are respectively connected to an upper connecting portion (connecting portion) 50 extending rearward and a lower portion of the side portion 73. A lower connecting portion (connecting portion) 60 is integrally formed. The upper connecting part 50 and the lower connecting part 60 connect the vertical rods 86 of the front frame 80F and the side parts 73 of the back frame 70B.

図５は、上部連結部を、背凭れの後方かつ幅方向外側から見た斜視図である。図６は、上部連結部を、背凭れの後方かつ幅方向内側から見た斜視図である。
図５、図６に示すように、上部連結部５０は、縦杆８６から後方に延びるとともに、後方に向かうにしたがって次第に幅方向の内側に延びている。この上部連結部５０は、縦杆８６の延在方向に交差する幅方向において、縦杆８６の全幅のうちの一部（幅方向内側）のみに一体に連結されている。図３、図５、図６に示すように、上部連結部５０は、板状部５１と、リブ（変形抑制部）５２Ａ，５２Ｂと、凹状部（変形許容部）５３と、を備える。 FIG. 5 is a perspective view of the upper connecting portion as seen from behind the backrest and from the outside in the width direction. FIG. 6 is a perspective view of the upper connecting portion as seen from behind the backrest and from the inner side in the width direction.
As shown in FIGS. 5 and 6, the upper connecting portion 50 extends rearward from the vertical shaft 86 and gradually extends inward in the width direction toward the rear. The upper connecting portion 50 is integrally connected to only a part (the inner side in the width direction) of the entire width of the vertical hook 86 in the width direction intersecting the extending direction of the vertical hook 86. As shown in FIGS. 3, 5, and 6, the upper connecting portion 50 includes a plate-like portion 51, ribs (deformation suppressing portions) 52 </ b> A and 52 </ b> B, and a concave portion (deformation allowing portion) 53.

板状部５１は、縦杆８６と背後枠７０Ｂの側辺部７３とを結ぶ前後方向、及び縦杆８６の延在方向を含む上下面に沿うよう形成されている。この実施形態において、板状部５１は、前方から後方に向かって、上下方向の高さが漸次小さくなるよう形成されている。   The plate-like portion 51 is formed along the upper and lower surfaces including the front-rear direction connecting the vertical rod 86 and the side portion 73 of the back frame 70 </ b> B and the extending direction of the vertical rod 86. In this embodiment, the plate-like portion 51 is formed so that the height in the vertical direction gradually decreases from the front to the rear.

リブ５２Ａ，５２Ｂは、縦杆８６と背後枠７０Ｂの側辺部７３とを結ぶ方向に連続し、板状部５１に交差する方向に突出して形成されている。この実施形態において、リブ５２Ａ，５２Ｂは、板状部５１において縦杆８６の延在方向の一端と他端、すなわち板状部５１の上端と下端とに沿って形成されている。さらに、リブ５２Ａ，５２Ｂは、板状部５１に対し、他方の側辺部７３側、つまり背凭れ７の幅方向の内側に向かって延びるよう形成されている。   The ribs 52 </ b> A and 52 </ b> B are continuous to the direction connecting the vertical rod 86 and the side portion 73 of the back frame 70 </ b> B, and are formed to protrude in a direction intersecting the plate-like portion 51. In this embodiment, the ribs 52 </ b> A and 52 </ b> B are formed along one end and the other end in the extending direction of the vertical rod 86 in the plate-like portion 51, that is, along the upper and lower ends of the plate-like portion 51. Further, the ribs 52 </ b> A and 52 </ b> B are formed to extend toward the other side portion 73 side, that is, the inner side in the width direction of the backrest 7 with respect to the plate-like portion 51.

凹状部５３は、縦杆８６の延在方向である上下方向において互いに隣接する複数のリブ５２Ａ，５２Ｂと板状部５１とに囲まれて形成されている。ここで、リブ５２Ａ，５２Ｂは、背凭れ７の幅方向の内側に向かって延びて形成されているので、凹状部５３は、板状部５１に対し、他方の縦杆８６側、つまり背凭れ７の幅方向の内側に開口するよう形成されている。   The concave portion 53 is formed so as to be surrounded by a plurality of ribs 52 </ b> A and 52 </ b> B and the plate-like portion 51 that are adjacent to each other in the vertical direction that is the extending direction of the vertical rod 86. Here, since the ribs 52 </ b> A and 52 </ b> B are formed to extend inward in the width direction of the backrest 7, the concave portion 53 is on the other vertical saddle 86 side, that is, the backrest with respect to the plate-like portion 51. 7 is formed so as to open inside 7 in the width direction.

このようにして、上部連結部５０は、板状部５１に沿ってリブ５２Ａ，５２Ｂとは異なる位置に、縦杆８６の弾性変形を許容する凹状部５３を備えている。これにより、上部連結部５０は、縦杆８６に対し、上部連結部５０のリブ５２Ａ，５２Ｂと板状部５１とが連結される。したがって、縦杆８６において凹状部５３に対向する部分は上部連結部５０に連結されていない。なお、この実施形態において、縦杆８６の一部である幅方向内側の端部８６Ｊは、上部連結部５０のリブ５２Ａとリブ５２Ｂとの間の凹状部５３に対向する部位で切り欠かれ、凹状部５３を張材７１側に開放している。   In this way, the upper connecting portion 50 includes the concave portion 53 that allows elastic deformation of the vertical rod 86 at a position different from the ribs 52 </ b> A and 52 </ b> B along the plate-like portion 51. As a result, the upper connecting portion 50 connects the ribs 52 </ b> A and 52 </ b> B of the upper connecting portion 50 and the plate-like portion 51 to the vertical hook 86. Accordingly, the portion of the vertical shaft 86 that faces the concave portion 53 is not connected to the upper connecting portion 50. In this embodiment, the end 86J in the width direction, which is a part of the vertical rod 86, is cut out at a portion facing the concave portion 53 between the rib 52A and the rib 52B of the upper connecting portion 50, The concave portion 53 is opened to the tension member 71 side.

図３に示すように、このような上部連結部５０は、その後端部５０ｓが、背後枠７０Ｂの側辺部７３の上部７３ｂにボルト５５により固定されている。   As shown in FIG. 3, the rear end portion 50s of such an upper connecting portion 50 is fixed to the upper portion 73b of the side portion 73 of the back frame 70B by a bolt 55.

図７は、下部連結部を、背凭れの後方かつ幅方向内側から見た斜視図である。
図４、図７に示すように、下部連結部６０は、縦杆８６から後方に延びるとともに、後方に向かうにしたがって次第に幅方向の内側に延びている。下部連結部６０は、板状部６１と、リブ（変形抑制部）６２Ａ，６２Ｂと、凹状部（変形許容部）６３と、を備える。 FIG. 7 is a perspective view of the lower connecting portion as seen from behind the backrest and from the inside in the width direction.
As shown in FIGS. 4 and 7, the lower connecting portion 60 extends rearward from the vertical shaft 86 and gradually extends inward in the width direction toward the rear. The lower connecting portion 60 includes a plate-like portion 61, ribs (deformation suppressing portions) 62 </ b> A and 62 </ b> B, and a concave portion (deformation allowing portion) 63.

板状部６１は、縦杆８６と背後枠７０Ｂの側辺部７３とを結ぶ前後方向、及び縦杆８６の延在方向を含む上下面に沿うよう形成されている。板状部６１は、前方から後方に向かって、その上下方向の高さが漸次小さくなるよう形成されている。   The plate-like portion 61 is formed along the upper and lower surfaces including the front-rear direction connecting the vertical rod 86 and the side portion 73 of the back frame 70B and the extending direction of the vertical rod 86. The plate-like portion 61 is formed such that the height in the vertical direction gradually decreases from the front to the rear.

リブ６２Ａ，６２Ｂは、縦杆８６と背後枠７０Ｂの側辺部７３とを結ぶ方向に連続し、板状部６１に交差する方向に突出して形成されている。この実施形態において、リブ６２Ａ，６２Ｂは、板状部６１において縦杆８６の延在方向の一端と他端、すなわち板状部６１の上端と下端とに沿って形成されている。さらに、リブ６２Ａ，６２Ｂは、板状部６１に対し、他方の側辺部７３側、つまり背凭れ７の幅方向の内側に向かって延びるよう形成されている。   The ribs 62 </ b> A and 62 </ b> B are formed so as to continue in a direction connecting the vertical rod 86 and the side portion 73 of the back frame 70 </ b> B and project in a direction intersecting the plate-like portion 61. In this embodiment, the ribs 62 </ b> A and 62 </ b> B are formed along one end and the other end in the extending direction of the vertical rod 86 in the plate-like portion 61, that is, along the upper and lower ends of the plate-like portion 61. Furthermore, the ribs 62 </ b> A and 62 </ b> B are formed to extend toward the other side portion 73 side, that is, the inner side in the width direction of the backrest 7 with respect to the plate-like portion 61.

凹状部６３は、縦杆８６の延在方向である上下方向において互いに隣接する複数のリブ６２Ａ，６２Ｂと板状部６１とに囲まれて形成されている。ここで、リブ６２Ａ，６２Ｂは、背凭れ７の幅方向の内側に向かって延びて形成されているので、凹状部６３は、板状部６１に対し、他方の縦杆８６側、つまり背凭れ７の幅方向の内側に開口するよう形成されている。   The concave portion 63 is formed by being surrounded by a plurality of ribs 62 </ b> A and 62 </ b> B and a plate-like portion 61 that are adjacent to each other in the vertical direction, which is the extending direction of the vertical rod 86. Here, since the ribs 62A and 62B are formed to extend inward in the width direction of the backrest 7, the concave portion 63 is on the other vertical saddle 86 side, that is, the backrest with respect to the plate-like portion 61. 7 is formed so as to open inside 7 in the width direction.

このようにして、下部連結部６０は、板状部６１に沿ってリブ６２Ａ，６２Ｂとは異なる位置に、縦杆８６の弾性変形を許容する凹状部６３を備えている。これにより、下部連結部６０は、縦杆８６に対し、下部連結部６０のリブ６２Ａ，６２Ｂと板状部６１とが連結される。したがって、縦杆８６において凹状部６３に対向する部分８６ｐは下部連結部６０に連結されていない。   In this way, the lower connecting portion 60 includes the concave portion 63 that allows the elastic deformation of the vertical rod 86 at a position different from the ribs 62A and 62B along the plate-like portion 61. As a result, in the lower connecting portion 60, the ribs 62 </ b> A and 62 </ b> B of the lower connecting portion 60 and the plate-like portion 61 are connected to the vertical rod 86. Therefore, the portion 86 p facing the concave portion 63 in the vertical rod 86 is not connected to the lower connecting portion 60.

図４に示すように、このような下部連結部６０は、その後端部６０ｓが、背後枠７０Ｂの側辺部７３の下部７３ａにボルト６５により固定されている。
背後枠７０Ｂの側辺部７３の下部７３ａには、固定コマ７６がボルト７７で固定されている。下部連結部６０は、その後端部６０ｓが、固定コマ７６に外嵌している。下部連結部６０と固定コマ７６とは、抜け止めピン７８により固定されている。 As shown in FIG. 4, the rear end portion 60s of the lower connecting portion 60 is fixed to the lower portion 73a of the side portion 73 of the back frame 70B with a bolt 65.
A fixed piece 76 is fixed to the lower portion 73a of the side portion 73 of the back frame 70B with a bolt 77. The lower connecting portion 60 has a rear end portion 60 s that is externally fitted to the fixed piece 76. The lower connecting portion 60 and the fixed piece 76 are fixed by a retaining pin 78.

このように構成された椅子１００では、背凭れ７において、縦杆８６は側辺部７３よりも前方に配置されている。よって、縦杆８６は、張材７１から作用する力により、縦杆８６と側辺部７３との前後方向の離間距離に対応して、着座者の身体に追従するように弾性変形する。また、張材７１の端部７１ｅが、縦杆８６の幅方向の外側の端部８６Ｋに固定されているため、荷重支持面７１ｆに着座者による荷重が作用すると、縦杆８６は端部８６Ｋ側が前方に向かって変位し、着座者の身体側に立ち上がって身体を側方から包み込むように変形する。したがって、着座者は、安定した状態で着座することができる。
また、着座者が張材７１の荷重支持面７１ｆの中央からずれた位置に着座しても、縦杆８６自体が弾性変形して撓むため、縦杆８６自体の硬さを感じて不快感を呈することがない。 In the chair 100 configured as described above, in the backrest 7, the vertical rod 86 is disposed in front of the side portion 73. Therefore, the vertical hook 86 is elastically deformed so as to follow the body of the seated person according to the distance in the front-rear direction between the vertical hook 86 and the side portion 73 by the force acting from the tension member 71. Further, since the end portion 71e of the upholstery material 71 is fixed to the end portion 86K on the outer side in the width direction of the vertical rod 86, when the load by the seated person acts on the load support surface 71f, the vertical rod 86 has the end portion 86K. The side is displaced toward the front and rises to the side of the occupant's body so as to wrap the body from the side. Therefore, the seated person can sit in a stable state.
Even if the seated person sits at a position deviated from the center of the load support surface 71f of the upholstery 71, the vertical hook 86 itself is elastically deformed and bent, so that the hardness of the vertical hook 86 itself can be felt and uncomfortable. Is not present.

さらに、縦杆８６と背後枠７０Ｂの側辺部７３とを連結する上部連結部５０，下部連結部６０は、板状部５１，６１の一部にリブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂが設けられているので、縦杆８６を強固に支持する一方、リブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂとは異なる位置に凹状部５３，６３を備えているので、着座者の荷重によって縦杆８６が弾性変形することを許容する。すなわち、上部連結部５０，下部連結部６０は、縦杆８６を支持する所要の強度を確保しつつ、縦杆８６の弾性変形を阻害することを抑えている。
このようにして、着座者が着座して張材７１の荷重支持面７１ｆに荷重をかけたときに、上部連結部５０，下部連結部６０が設けられている部分で縦杆８６自体の硬さを感じて不快感を呈することを抑えることができる。 Further, the upper connecting portion 50 and the lower connecting portion 60 that connect the vertical rod 86 and the side portion 73 of the back frame 70B are provided with ribs 52A, 52B, 62A, 62B in part of the plate-like portions 51, 61. Therefore, the vertical rod 86 is firmly supported, while the concave portions 53 and 63 are provided at positions different from the ribs 52A, 52B, 62A, and 62B, so that the vertical rod 86 is elastically deformed by the load of the seated person. Allow that. That is, the upper connecting part 50 and the lower connecting part 60 prevent the elastic deformation of the vertical hook 86 from being inhibited while ensuring the required strength for supporting the vertical hook 86.
In this way, when the seated person sits and applies a load to the load support surface 71f of the tension member 71, the hardness of the vertical hook 86 itself at the portion where the upper connecting portion 50 and the lower connecting portion 60 are provided. It is possible to suppress feeling uncomfortable feeling.

また、上部連結部５０，下部連結部６０は、その側面に、リブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂと板状部５１，６１とに囲まれた凹状部５３，６３を形成している。これにより、縦杆８６には、上部連結部５０，下部連結部６０のリブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂと板状部５１，６１とが連結される。したがって、縦杆８６において凹状部５３，６３に対向する部分においては、縦杆８６の背後枠７０Ｂの側辺部７３側への弾性変形を許容することができる。   Moreover, the upper connection part 50 and the lower connection part 60 form the concave parts 53 and 63 surrounded by the ribs 52A, 52B, 62A and 62B and the plate-like parts 51 and 61 on the side surfaces. Thereby, the ribs 52A, 52B, 62A, 62B of the upper connecting part 50 and the lower connecting part 60 and the plate-like parts 51, 61 are connected to the vertical hook 86. Therefore, elastic deformation of the vertical rod 86 toward the side portion 73 side of the back frame 70B can be allowed at a portion facing the concave portions 53 and 63 in the vertical rod 86.

また、リブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂは、板状部５１，６１において延在方向の一端と他端とにそれぞれ形成されているので、上部連結部５０，下部連結部６０は、縦杆８６を強固に支持することができる。   Further, since the ribs 52A, 52B, 62A, 62B are formed at one end and the other end in the extending direction of the plate-like portions 51, 61, respectively, the upper connecting portion 50 and the lower connecting portion 60 are provided with the vertical hook 86. Can be firmly supported.

また、凹状部５３，６３は、板状部５１，６１に対し、背凭れ７の内方に向かって開口するため、外観が損なわれることを抑えることができる。   Moreover, since the recessed parts 53 and 63 open toward the inner side of the backrest 7 with respect to the plate-shaped parts 51 and 61, it can suppress that an external appearance is impaired.

また、縦杆８６の一部である幅方向内側の端部８６Ｊが凹状部５３に対向する部位で切り欠かれ、凹状部５３が張材７１側に開放されているので、縦杆８６の背後枠７０Ｂの側辺部７３側への弾性変形を、より容易に生じやすくすることができる。   In addition, the end 86J in the width direction, which is a part of the vertical rod 86, is cut out at a portion facing the concave portion 53, and the concave portion 53 is opened to the tension member 71 side. Elastic deformation of the frame 70B toward the side portion 73 can be more easily generated.

また、上部連結部５０は、縦杆８６において延在方向に交差する幅方向内側の一部のみに連結されている。このように構成することで、着座者による荷重によって縦杆８６が弾性変形する際、縦杆８６において、上部連結部５０が連結されていない幅方向外側の残部（端部８６Ｋ）は、上部連結部５０に連結された幅方向内側の端部８６Ｊ側を中心として前方に立ち上がるようにして容易に弾性変形することができる。これにより、上部連結部５０によって縦杆８６の弾性変形を阻害することを、より一層抑えることができる。   Further, the upper connecting portion 50 is connected to only a part of the inner side in the width direction intersecting the extending direction in the vertical shaft 86. With this configuration, when the vertical hook 86 is elastically deformed by the load of the seated person, the remaining portion (end portion 86K) on the outer side in the width direction where the upper connecting portion 50 is not connected is connected to the upper connecting portion. It can be easily elastically deformed so as to rise forward with the end portion 86J side in the width direction connected to the portion 50 as a center. Thereby, inhibiting the elastic deformation of the vertical hook 86 by the upper connection part 50 can be suppressed further.

また、縦杆８６は荷重支持面７１ｆに沿う板状に形成されているため、縦杆８６自体が荷重支持面７１ｆに沿って変形しやすい。よって、縦杆８６は張材７１に引っ張られて、着座者の身体を側方から包み込むように、一層変位しやすい。   Further, since the vertical rod 86 is formed in a plate shape along the load support surface 71f, the vertical rod 86 itself is easily deformed along the load support surface 71f. Accordingly, the vertical rod 86 is pulled by the tension member 71 and is more easily displaced so as to wrap the body of the seated person from the side.

このようにして、上記背凭れ７及び椅子１００によれば、着座者が背凭れ７に荷重をかけたときに違和感を感じることを抑え、着座感を向上することができる。   In this way, according to the backrest 7 and the chair 100, it is possible to suppress a sense of discomfort when the seated person applies a load to the backrest 7, and to improve the seating feeling.

なお、本発明は、図面を参照して説明した上述の実施形態に限定されるものではなく、その技術的範囲において様々な変形例が考えられる。
例えば、上記実施形態では、上部連結部５０，下部連結部６０の双方に凹状部５３，６３を形成するようにしたが、少なくとも上部連結部５０に凹状部５３を備えていればよく、下部連結部６０には凹状部６３を備えない構成としてもよい。
このように構成することで、背凭れ７の少なくとも上部において、着座者が着座して張材７１の荷重支持面７１ｆに荷重をかけたときに、縦杆８６が弾性変形しやすくする一方で、背凭れ７の下部においては、凹状部６３を備えない下部連結部６０によって縦杆８６を強固に支持し、高いホールド感を提供することもできる。 The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above embodiment, the concave portions 53 and 63 are formed in both the upper connecting portion 50 and the lower connecting portion 60. However, it is sufficient that at least the upper connecting portion 50 includes the concave portion 53. The part 60 may be configured not to include the concave part 63.
By configuring in this way, at least at the upper part of the backrest 7, when the seated person sits and applies a load to the load support surface 71f of the tension member 71, the vertical saddle 86 is easily elastically deformed, In the lower part of the backrest 7, the vertical hook 86 is firmly supported by the lower connecting part 60 that does not include the concave part 63, and a high hold feeling can be provided.

また、上記に示す実施形態では、リブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂを、板状部５１，６１の上端と下端とに沿うように設けたが、リブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂは、板状部５１，６１の上端、下端よりも、板状部５１，６１の上下方向中間部側にオフセットした部位に形成してもよい。さらに、板状部５１，６１に、二つのリブリブ５２Ａ，５２Ｂ、６２Ａ，６２Ｂを形成したが、一つ、あるいは三つ以上のリブを設けるようにしてもよい。
さらに、上記に示す実施形態では、凹状部５３，６３を、板状部５１，６１に対して背凭れ７の幅方向の内側に開口するようにしたが、これに限らず、凹状部５３，６３を、背凭れ７の幅方向の外側に開口するようにしてもよい。 Moreover, in embodiment shown above, although rib 52A, 52B, 62A, 62B was provided along the upper end and lower end of plate-shaped part 51, 61, rib 52A, 52B, 62A, 62B is plate-shaped. You may form in the site | part offset to the up-down direction intermediate part side of the plate-shaped parts 51 and 61 rather than the upper end of the parts 51 and 61, and a lower end. Furthermore, although the two rib ribs 52A, 52B, 62A, and 62B are formed on the plate-like portions 51 and 61, one or three or more ribs may be provided.
Furthermore, in embodiment shown above, although the recessed parts 53 and 63 were opened inside the width direction of the backrest 7 with respect to the plate-shaped parts 51 and 61, not only this but the recessed parts 53, 63 may be opened to the outside in the width direction of the backrest 7.

また、上記に示す実施形態では、背凭れ７が、本発明にかかる椅子用荷重支持部材で構成されているが、本発明はこれに限られず、座体４のみ、または座体４及び背凭れ７の両方を、本発明にかかる椅子用荷重支持部材で構成してもよい。   Moreover, in the embodiment shown above, the backrest 7 is constituted by the load support member for a chair according to the present invention, but the present invention is not limited to this, and only the seat body 4 or the seat body 4 and the backrest. You may comprise both of 7 by the load support member for chairs concerning this invention.

また、上記に示す実施形態では、縦杆８６は、それぞれ荷重支持面７１ｆに沿う板状に形成されているが、本発明はこれに限られず、板状に形成されていなくてもよい。
そして、上記実施形態における構成は本発明の一例であり、当該発明の要旨を逸脱しない範囲で種々の変更が可能である。 In the embodiment described above, the vertical rod 86 is formed in a plate shape along the load support surface 71f. However, the present invention is not limited to this, and may not be formed in a plate shape.
And the structure in the said embodiment is an example of this invention, A various change is possible in the range which does not deviate from the summary of the said invention.

４…座体
７…背凭れ（椅子用荷重支持部材）
３０…支持構造体
５０…上部連結部（連結部）
５１…板状部
５２Ａ、５２Ｂ…リブ（変形抑制部）
５３…凹状部（変形許容部）
６０…下部連結部（連結部）
６１…板状部
６２Ａ，６２Ｂ…リブ（変形抑制部）
６３…凹状部（変形許容部）
７１…張材
７１ｆ…荷重支持面
７３…側辺部（補強杆）
７３ａ…下部
７３ｂ…上部
８６…縦杆（杆体）
１００…椅子
Ｆ…床面 4 ... Seat 7 ... Backrest (chair load support member)
30 ... Support structure 50 ... Upper connecting part (connecting part)
51: Plate-like parts 52A, 52B ... Ribs (deformation suppressing parts)
53 ... concave part (deformation allowance part)
60 ... Lower connection part (connection part)
61 ... Plate-like parts 62A, 62B ... Rib (deformation suppressing part)
63 ... concave part (deformable part)
71 ... tension member 71f ... load support surface 73 ... side portion (reinforcement rod)
73a ... Lower 73b ... Upper 86 ... Vertical rod
100 ... Chair F ... Floor

Claims (9)

着座者の荷重を受ける荷重支持面が形成された張材と、
前記荷重支持面に沿って互いに離間して配置され、前記張材の端部が取り付けられるとともに、前記張材から作用する力に応じて弾性変形可能な一対の杆体と、
各前記杆体の延在方向に沿うととともに、前記杆体における前記張材側と反対側に、前記荷重支持面の面直方向に離間して配置された補強杆と、
前記杆体と前記補強杆とを連結する連結部と、を備え、
前記連結部は、
前記杆体と前記補強杆とを結ぶ方向、及び前記杆体の前記延在方向を含む面に沿う板状部と、
前記板状部に交差する方向に延びる変形抑制部と、
前記変形抑制部とは異なる位置に形成された変形許容部と、
を備えることを特徴とする椅子用荷重支持部材。 A tension material formed with a load bearing surface that receives the load of the seated person,
A pair of housings that are spaced apart from each other along the load support surface, to which the end of the tension member is attached, and that can be elastically deformed according to the force acting from the tension member,
Reinforcing rods arranged along the extending direction of each of the housings, and spaced apart in the direction perpendicular to the load support surface on the side opposite to the tension member side of the housings,
A connecting portion for connecting the housing and the reinforcing rod,
The connecting portion is
A plate-like portion along a direction including the direction connecting the housing and the reinforcing rod, and the extending direction of the housing;
A deformation suppressing portion extending in a direction intersecting the plate-like portion;
A deformation allowing portion formed at a position different from the deformation suppressing portion;
A load supporting member for a chair, comprising: 前記変形抑制部は、前記杆体と前記補強杆とを結ぶ方向に連続し、前記板状部から前記板状部に交差する方向に突出するリブを有し、前記リブが前記杆体の前記延在方向に間隔をあけて複数設けられ、
前記変形許容部は、前記延在方向において互いに隣接する複数の前記リブと前記板状部とに囲まれて形成された凹状部を有することを特徴とする請求項１に記載の椅子用荷重支持部材。 The deformation suppressing portion includes a rib that is continuous in a direction connecting the casing and the reinforcing rod and protrudes from the plate-like portion in a direction intersecting the plate-like portion, and the rib extends the extension of the casing. A plurality are provided at intervals in the direction,
2. The chair load support according to claim 1, wherein the deformation allowing portion includes a recessed portion formed by being surrounded by the plurality of ribs and the plate-like portion adjacent to each other in the extending direction. Element. 前記リブは、前記板状部において前記延在方向の一端と他端とにそれぞれ形成されていることを特徴とする請求項２に記載の椅子用荷重支持部材。   The said rib is formed in the said plate-shaped part at the one end and the other end of the said extension direction, respectively, The load support member for chairs of Claim 2 characterized by the above-mentioned. 前記凹状部は、前記板状部に対し、他方の前記杆体側に開口するよう形成されていることを特徴とする請求項２又は３に記載の椅子用荷重支持部材。   The chair load support member according to claim 2 or 3, wherein the concave portion is formed so as to open to the other housing side with respect to the plate-like portion. 前記杆体の一部が前記凹状部に対向する部位で切り欠かれ、前記凹状部は前記張材側に開放されていることを特徴とする請求項２から４のいずれか一項に記載の椅子用荷重支持部材。   The chair according to any one of claims 2 to 4, wherein a part of the housing is cut out at a portion facing the concave portion, and the concave portion is open to the tension member side. Load support member. 前記連結部は、前記杆体において前記延在方向に交差する幅方向の一部のみに連結されていることを特徴とする請求項１から５の何れか一項に記載の椅子用荷重支持部材。   The load connecting member for a chair according to any one of claims 1 to 5, wherein the connecting portion is connected to only a part of a width direction intersecting the extending direction in the housing. 前記杆体は、前記荷重支持面に沿う板状に形成されていることを特徴とする請求項１から６のいずれか一項に記載の椅子用荷重支持部材。   The load supporting member for a chair according to any one of claims 1 to 6, wherein the casing is formed in a plate shape along the load supporting surface. 床面に設置される支持構造体と、
前記支持構造体に支持された座体及び背凭れと、を備え、
前記座体及び前記背凭れの少なくとも一方は、請求項１から７のいずれか一項に記載の椅子用荷重支持部材で構成されていることを特徴とする椅子。 A support structure installed on the floor;
A seat and a backrest supported by the support structure;
At least one of the said seat and the said backrest is comprised with the load support member for chairs as described in any one of Claim 1 to 7, The chair characterized by the above-mentioned. 前記背凭れは、前記椅子用荷重支持部材で構成され、
前記背凭れの上部において前記杆体と前記補強杆とを連結する上部連結部と、
前記背凭れの下部において前記杆体と前記補強杆とを連結する下部連結部と、を備え、
少なくとも前記上部連結部は、前記連結部により形成されていることを特徴とする請求項８に記載の椅子。 The backrest is composed of the chair load support member,
An upper connecting portion for connecting the housing and the reinforcing rod at an upper portion of the backrest;
A lower connecting portion that connects the housing and the reinforcing collar at the lower part of the backrest,
The chair according to claim 8, wherein at least the upper connecting portion is formed by the connecting portion.
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JP7381291B2 (en) 2019-10-28 2023-11-15 株式会社オカムラ Chair

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JP2010063831A (en) * 2008-09-12 2010-03-25 Kokuyo Co Ltd Chair
JP2011120934A (en) * 2011-02-07 2011-06-23 Okamura Corp Chair
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WO2014196630A1 (en) * 2013-06-06 2014-12-11 株式会社イトーキ Chair

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Publication number Priority date Publication date Assignee Title
JP2002119366A (en) * 2000-10-16 2002-04-23 Kokuyo Co Ltd Chair
JP2006230488A (en) * 2005-02-22 2006-09-07 Okamura Corp Backrest device of chair, and method for attaching backrest of chair
JP2010063831A (en) * 2008-09-12 2010-03-25 Kokuyo Co Ltd Chair
JP2011160977A (en) * 2010-02-09 2011-08-25 Okamura Corp Backrest mounting structure in chair
JP2011120934A (en) * 2011-02-07 2011-06-23 Okamura Corp Chair
WO2014196630A1 (en) * 2013-06-06 2014-12-11 株式会社イトーキ Chair

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7381291B2 (en) 2019-10-28 2023-11-15 株式会社オカムラ Chair

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