JP2016087249A

JP2016087249A - Chair

Info

Publication number: JP2016087249A
Application number: JP2014227282A
Authority: JP
Inventors: 府佐雄安田; Fusao Yasuda; 正樹松本; Masaki Matsumoto; 由紀子丹呉; Yukiko Tango; 祐子鶴丸; Yuko Tsurumaru; 安都夫岡本; Atsuo Okamoto; 治宣齊藤; Harunobu Saito; 惇喜渡井; Atsuki Watai; 聖士山田; Seiji Yamada
Original assignee: Uchida Yoko Co Ltd; Sankei Kogyo KK
Current assignee: Uchida Yoko Co Ltd; Sankei Kogyo KK
Priority date: 2014-11-07
Filing date: 2014-11-07
Publication date: 2016-05-23
Anticipated expiration: 2034-11-07
Also published as: JP6504535B2

Abstract

PROBLEM TO BE SOLVED: To provide a chair capable of securely maintaining a state having the seat flipped-up, suppressing cost rise and improving the appearance.SOLUTION: In a chair (1), a chair having legs (4), a seat part (14) and a backrest (12), the seat part is attached to the legs with a rotation mechanism which has a support shaft (38) and a bearing part (42) so that it can swing between a horizontal position during use and a flipped-up position having the front of the seat part flipped up, and the rotation mechanism has a projection (40) and an engagement hole (50) which hold the seat part at a flipped-up position.SELECTED DRAWING: Figure 1

Description

本発明は、椅子に関し、特に、脚と、座部と、背凭れとを有する椅子に関する。 The present invention relates to a chair, and more particularly, to a chair having a leg, a seat portion, and a backrest.

従来から、複数の椅子を前後方向に重ね合わせる（ネスティングする）ことにより、省スペースで収納できるようにした椅子が知られている。
例えば、特許文献１には、左右一対の後脚フレーム及び前脚フレームと、左右の前脚フレーム間に架け渡された座フレームと、前脚フレームから上方に延びる背フレームとを備え、座を座フレーム上に取り付け、背凭れを背フレームに取り付けた椅子が記載されている。 2. Description of the Related Art Conventionally, there is known a chair that can be stored in a space-saving manner by stacking (nesting) a plurality of chairs in the front-rear direction.
For example, Patent Document 1 includes a pair of left and right rear leg frames and front leg frames, a seat frame spanned between the left and right front leg frames, and a back frame extending upward from the front leg frame. The chair with the backrest attached to the back frame is described.

この特許文献１の椅子では、座フレームは、前脚フレームの間で前後方向に枝分かれした座前フレーム及び座後フレームを備えている。そして、座前フレームには、座を下方から支持する座支持部が設けられており、座後フレームの中央には、座の下面側に設けられた回動部を回転可能に取り付ける座取付部が設けられている。即ち、椅子の使用時には、座支持部により座が水平状態に支持され、椅子の収納時には、座取付部を中心に座が回動して座面が背凭れに接する程度にまで跳ね上げられることにより、椅子のネスティングが可能となる。 In the chair of Patent Document 1, the seat frame includes a front seat frame and a rear seat frame that branch in the front-rear direction between the front leg frames. The front seat frame is provided with a seat support portion for supporting the seat from below, and a seat mounting portion for rotatably mounting a rotating portion provided on the lower surface side of the seat at the center of the rear seat frame. Is provided. In other words, when the chair is used, the seat is supported horizontally by the seat support part, and when the chair is stored, the seat rotates about the seat mounting part and is lifted up to the extent that the seat surface comes into contact with the backrest. Allows nesting of chairs.

特開２０１１−６２３８４号公報JP 2011-62384 A

ところで、特許文献１に記載されているような従来の椅子では、座を回動させて座面が背凭れに接する程度にまで跳ね上げたときに、座の重心を座取付部よりも後方に位置させることによって、座が前下方に倒れ戻ることを防止している。従って、座を跳ね上げた状態で椅子の移動やネスティングを行う際に、衝撃等によって意図せずに座が前下方に倒れ戻ってしまうという問題がある。 By the way, in the conventional chair as described in Patent Document 1, when the seat is rotated so that the seat surface is lifted up to contact with the backrest, the center of gravity of the seat is located behind the seat mounting portion. By being positioned, the seat is prevented from falling back forward and downward. Therefore, when the chair is moved or nested in a state where the seat is flipped up, there is a problem that the seat falls down to the front and lower side unintentionally due to an impact or the like.

また、特許文献１に記載の椅子では、座を回動可能とするために、座前フレームから枝分かれした座後フレームに座取付部を設けると共に座の下面に回動部を設けているので、椅子の構造が複雑になると共に、座を跳ね上げたときの椅子の美観が損なわれており、コストやデザインの面においても向上の余地がある。 Further, in the chair described in Patent Document 1, in order to make the seat pivotable, the seat mounting portion is provided on the rear seat frame branched from the front seat frame, and the pivot portion is provided on the lower surface of the seat. As the structure of the chair becomes complicated, the aesthetic appearance of the chair when the seat is flipped up is impaired, and there is room for improvement in terms of cost and design.

本発明は、上述した従来技術の問題点を解決するためになされたものであり、座部を跳ね上げた状態で確実に保持することができると共に、コスト上昇を抑制し美観を向上させることができる椅子を提供することを目的とする。 The present invention has been made in order to solve the above-described problems of the prior art, and can reliably hold the seat portion in a state in which the seat portion is flipped up, and can suppress an increase in cost and improve aesthetics. The purpose is to provide a chair that can be used.

上記の目的を達成するために、本発明の椅子は、脚と、座部と、背凭れとを有する椅子であって、座部は、使用時における水平位置と、座部の前部を上方に跳ね上げた跳ね上げ位置との間で揺動可能となるように、回動機構を介して脚に対して取り付けられており、回動機構は、座部を跳ね上げ位置に保持する係止手段を有することを特徴とする。
このように構成された本発明においては、係止手段を有するので、座部を跳ね上げた状態で確実に保持し、座部が倒れ難くすることができ、これにより、座部を跳ね上げた状態で椅子の移動やネスティングを容易に行うことができる。また、係止手段は回動機構に設けられているので、座部を跳ね上げ位置で保持するための構造を背凭れや脚に設ける必要がなく、コスト上昇を抑制し美観の悪化を抑制することができる。 In order to achieve the above object, a chair of the present invention is a chair having legs, a seat portion, and a backrest, and the seat portion has a horizontal position in use and a front portion of the seat portion upward. It is attached to the leg via a rotation mechanism so as to be able to swing between the position and the flip-up position, and the rotation mechanism is a latch that holds the seat in the flip-up position. It has the means.
In the present invention configured as described above, since the locking means is provided, it is possible to securely hold the seat portion in a state in which the seat portion is flipped up, and to prevent the seat portion from falling down. The chair can be easily moved and nested in the state. Further, since the locking means is provided in the rotation mechanism, it is not necessary to provide a structure for holding the seat in the flip-up position on the backrest or the leg, and the cost increase is suppressed and the appearance is not deteriorated. be able to.

また、本発明の椅子において、回動機構は、座部又は脚の一方に設けられた軸と、座部又は脚の他方に設けられて軸を受け入れる軸受とを有し、係止手段は、回動機構の軸又は軸受の一方と共に回動する突起と、軸又は軸受の他方と共に回動する嵌合孔とを備え、突起は、座部が跳ね上げ位置にある場合、座部を跳ね上げ位置に保持するように嵌合孔に嵌合し、跳ね上げ位置に保持されている座部を水平位置に向けて押し下げる力が加えられた場合、嵌合孔から離脱する。
このように構成された本発明においては、座部を跳ね上げ位置まで揺動させると、突起が嵌合孔に嵌合して座部を跳ね上げ位置に保持し、跳ね上げ位置に保持されている座部を水平位置に向けて押し下げる力が加えられた場合、突起が嵌合孔から離脱することで跳ね上げ位置における保持状態が解除されるので、突起と嵌合孔という簡易な構造で座部を跳ね上げ位置に確実に保持できると共に、跳ね上げ位置における保持状態からの解除も容易に行うことができる。 Further, in the chair of the present invention, the rotation mechanism has a shaft provided on one of the seat or the leg and a bearing provided on the other of the seat or the leg to receive the shaft. A protrusion that rotates with one of the shaft or the bearing of the rotation mechanism and a fitting hole that rotates with the other of the shaft or the bearing, and the protrusion raises the seat when the seat is in the flip-up position. When a force that pushes down the seat portion held in the flip-up position toward the horizontal position is applied to the fitting hole so as to be held at the position, the seat is detached from the fitting hole.
In the present invention configured as described above, when the seat portion is swung to the flip-up position, the protrusion fits into the fitting hole to hold the seat portion in the flip-up position, and is held in the flip-up position. When a force is applied to push down the seat portion toward the horizontal position, the projection is released from the fitting hole, and the holding state in the flip-up position is released. The part can be reliably held at the flip-up position, and can be easily released from the holding state at the flip-up position.

また、本発明の椅子は、さらに、座部の後部の左右両側部のそれぞれに設けられた一対の座部支持部を有し、座部支持部のそれぞれに回動機構が設けられ、さらに、左右一対の肘掛を有し、肘掛の下端部は、椅子の幅方向外側から座部支持部に取り付けられている。
このように構成された本発明においては、座部の後部の左右両側部に設けられた一対の座部支持部のそれぞれに回動機構が設けられているので、座部の下面や脚等に座部を回動させるための複雑な回動機構を設ける必要がなく、背凭れと一体感のある位置において単純な構造で座部を支持することができ、これにより、コスト上昇を抑制しつつ美観を向上させることができる。
また、肘掛の下端部は、椅子の幅方向外側から座部支持部に取り付けられているので、肘掛を取り付けるための取付構造を別途背凭れや脚に設ける必要がなく、これにより、コスト上昇や美観の悪化を抑制しつつ、肘掛を設けることができる。
さらに、肘掛の取付構造には高い強度が必要とされるが、肘掛の下端部は、椅子の幅方向外側から座部支持部に取り付けられているので、この座部支持部の強度を高めればよく、これにより、肘掛を取り付けるための取付構造を別途背凭れや脚に設けた場合と比較して、肘掛の取付構造に要求される強度を容易且つ確実に実現することができる。 In addition, the chair of the present invention further includes a pair of seat support parts provided on each of the left and right side parts of the rear part of the seat part, each of the seat support parts is provided with a rotation mechanism, The armrest has a pair of left and right armrests, and the lower end of the armrest is attached to the seat support portion from the outside in the width direction of the chair.
In the present invention configured as described above, each of the pair of seat support portions provided on the left and right sides of the rear portion of the seat is provided with a rotation mechanism, so that the lower surface of the seat, the leg, etc. It is not necessary to provide a complicated rotation mechanism for rotating the seat portion, and the seat portion can be supported with a simple structure at a position where the backrest is united with the backrest, thereby suppressing an increase in cost. Aesthetics can be improved.
In addition, since the lower end of the armrest is attached to the seat support portion from the outside in the width direction of the chair, there is no need to provide a separate mounting structure for attaching the armrest on the backrest or leg, thereby increasing the cost and The armrest can be provided while suppressing the deterioration of the aesthetic appearance.
Furthermore, the armrest mounting structure requires high strength, but the lower end of the armrest is attached to the seat support from the outside in the width direction of the chair, so if the strength of this seat support is increased Well, this makes it possible to easily and reliably realize the strength required for the armrest mounting structure as compared to the case where the mounting structure for mounting the armrest is separately provided on the backrest or the leg.

また、脚は、左右一対の前脚と、左右一対の後脚とを含み、背凭れは、その左右両側のそれぞれから下方に延びる支持フレーム部を有し、座部支持部は、その後方に、背凭れの支持フレーム部と後脚とを連結する連結部を有し、後脚、連結部、及び、支持フレーム部は、下からこの順序で互いに同軸上に連結されている。
このように構成された本発明においては、座部支持部は、その後方に設けられた連結部により、後脚の上端と背凭れの支持フレーム部の下端とを同軸上に連結する連結構造を兼ねているので、背凭れ及び後脚と一体感のある位置において単純な構造で座部を支持することができ、これにより、美観を一層向上させることができる。また、椅子の組立作業を簡単にすることができる。 Further, the leg includes a pair of left and right front legs and a pair of left and right rear legs, the backrest has a support frame portion extending downward from each of the left and right sides, and the seat support portion is located behind it. It has a connection part which connects a back support frame part and a back leg, and a back leg, a connection part, and a support frame part are mutually connected coaxially in this order from the bottom.
In the present invention configured as described above, the seat support part has a connection structure that coaxially connects the upper end of the rear leg and the lower end of the support frame part of the backrest by the connection part provided at the rear thereof. Since it also serves, the seat portion can be supported with a simple structure at a position where the backrest and the rear leg are united with each other, thereby further improving the aesthetic appearance. Moreover, the assembly work of the chair can be simplified.

本発明の椅子によれば、座部を跳ね上げた状態で確実に保持することができると共に、コスト上昇を抑制し美観を向上させることができる。 According to the chair of this invention, while being able to hold | maintain in the state which raised the seat part reliably, a cost rise can be suppressed and aesthetics can be improved.

本発明の実施形態による椅子を左前方から見た斜視図である。It is the perspective view which looked at the chair by embodiment of this invention from the left front. 本発明の実施形態による椅子の座部支持部及び肘掛の拡大正面図である。It is an enlarged front view of the seat part support part and armrest of the chair by embodiment of this invention. 本発明の実施形態による座部支持部の内部構造を示す拡大斜視図である。It is an expansion perspective view which shows the internal structure of the seat part support part by embodiment of this invention. 本発明の実施形態による座部支持部の内部構造を示す拡大側面図である。It is an enlarged side view which shows the internal structure of the seat part support part by embodiment of this invention. 本発明の実施形態による椅子２脚をネスティングした状態を示す側面図である。It is a side view which shows the state which nested the two chairs by embodiment of this invention. 本発明の実施形態の変形例による椅子を右前方から見た斜視図である。It is the perspective view which looked at the chair by the modification of embodiment of this invention from the right front.

以下、添付図面を参照して、本発明の実施形態による椅子を説明する。
まず、図１及び図２により、本発明の実施形態による椅子について説明する。図１は本発明の実施形態による椅子を左前方から見た斜視図であり、図２は本発明の実施形態による椅子の座部支持部及び肘掛の拡大正面図である。 Hereinafter, a chair according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, a chair according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a chair according to an embodiment of the present invention as viewed from the left front, and FIG. 2 is an enlarged front view of a seat support portion and an armrest of the chair according to an embodiment of the present invention.

図１に示すように、椅子１は、左右一対の前脚２と、左右一対の後脚４とを備えている。これらの各前脚２及び後脚４の下端には、キャスター６が取り付けられている。
各前脚２は、下端から後上方へ延び、且つ、長手方向の中央近傍で上方に凸状に屈曲した略へ字形に形成されている。左右の前脚２は、それぞれの前脚２の間を幅方向に延びる連結フレーム１０によって連結されている。
また、各後脚４は、下端から上方へ延び、その上端において前脚２の後端と連結されている。この左右一対の後脚４間の距離は、左右一対の前脚２の幅方向外側面間の距離よりも大きくなっている。また、後脚４は、長手方向に直交する断面が円形の円筒形状に形成されている。 As shown in FIG. 1, the chair 1 includes a pair of left and right front legs 2 and a pair of left and right rear legs 4. Casters 6 are attached to the lower ends of the front legs 2 and the rear legs 4.
Each front leg 2 extends rearward and upward from the lower end, and is formed in a substantially square shape that is bent upwardly in the vicinity of the center in the longitudinal direction. The left and right front legs 2 are connected between the front legs 2 by a connecting frame 10 extending in the width direction.
Each rear leg 4 extends upward from the lower end, and is connected to the rear end of the front leg 2 at the upper end. The distance between the pair of left and right rear legs 4 is larger than the distance between the outer surfaces in the width direction of the pair of left and right front legs 2. Further, the rear leg 4 is formed in a cylindrical shape having a circular cross section perpendicular to the longitudinal direction.

各後脚４の上方には、背凭れ１２が取り付けられている。背凭れ１２は、平面視で後方に凸の湾曲板状に形成され、この背凭れ１２の左右両側のそれぞれから下方に延びる支持フレーム部１２ａの下端が、後述する連結部を介して各後脚４の上端に連結されている。支持フレーム部１２ａは、長手方向に直交する断面が円形の円筒形状に形成されており、円形断面の半径は、後脚４の円形断面の半径と等しい。
座部１４は、ユーザが着座可能な使用位置において、背凭れ１２の下端から前方に向かって略水平に延びるように配置される。座部１４は、例えば、略四角形に形成した座部フレーム１６の下面側に底板１８を取り付けると共に、上面側にクッション２０を取り付けることにより構成される。また、座部１４の下面には、使用位置において連結フレーム１０の上面に当接する当接部２２が設けられている。 A backrest 12 is attached above each rear leg 4. The backrest 12 is formed in a curved plate shape that is convex rearward in plan view, and the lower end of the support frame portion 12a extending downward from each of the left and right sides of the backrest 12 is connected to each rear leg via a connecting portion described later. 4 is connected to the upper end. The support frame portion 12 a is formed in a cylindrical shape having a circular cross section perpendicular to the longitudinal direction, and the radius of the circular cross section is equal to the radius of the circular cross section of the rear leg 4.
The seat portion 14 is disposed so as to extend substantially horizontally from the lower end of the backrest 12 toward the front in a use position where the user can sit. The seat portion 14 is configured, for example, by attaching a bottom plate 18 to the lower surface side of the seat portion frame 16 formed in a substantially square shape and attaching a cushion 20 to the upper surface side. In addition, an abutting portion 22 that abuts on the upper surface of the connection frame 10 at the use position is provided on the lower surface of the seat portion 14.

さらに、各後脚４の上端と背凭れ１２の下端との連結部分の前方に、座部１４の前部が上下方向に揺動可能なように座部１４の後部を左右両側から支持する左右一対の座部支持部２４が設けられている。各座部支持部２４の外形は、椅子１の幅方向に延びる中心軸線を持つ円筒形に形成されている。 Further, in front of the connecting portion between the upper end of each rear leg 4 and the lower end of the backrest 12, the left and right sides support the rear portion of the seat portion 14 from both left and right sides so that the front portion of the seat portion 14 can swing in the vertical direction. A pair of seat part support parts 24 is provided. The outer shape of each seat support 24 is formed in a cylindrical shape having a central axis extending in the width direction of the chair 1.

また、図１及び図２に示すように、左右の肘掛２６は、それぞれ、椅子１の幅方向外側から左右の座部支持部２４に固定されている。この肘掛２６の下端部２８は、側面視で座部支持部２４の外周とほぼ同じ形状の円筒形に形成されている。そして、下端部２８から前上方へ支柱部３０が延び、支柱部３０の上端に、前後方向に延びる肘掛本体３２が設けられている。 Further, as shown in FIGS. 1 and 2, the left and right armrests 26 are respectively fixed to the left and right seat support portions 24 from the outside in the width direction of the chair 1. The lower end 28 of the armrest 26 is formed in a cylindrical shape having substantially the same shape as the outer periphery of the seat support 24 in a side view. And the support | pillar part 30 is extended to the front upper direction from the lower end part 28, and the armrest main body 32 extended in the front-back direction is provided in the upper end of the support | pillar part 30.

次に、図３及び図４により、本発明の実施形態における座部支持部２４を詳細に説明する。図３は、本発明の実施形態による座部支持部２４の内部構造を示す拡大斜視図であり、図４は、本発明の実施形態による座部支持部２４の内部構造を示す拡大側面図である。
なお、図３及び図４では、座部支持部２４の構造を見え易くするために、座部１４の底板１８及びクッション２０の図示を省略している。 Next, referring to FIGS. 3 and 4, the seat support 24 in the embodiment of the present invention will be described in detail. FIG. 3 is an enlarged perspective view showing the internal structure of the seat support 24 according to the embodiment of the present invention, and FIG. 4 is an enlarged side view showing the internal structure of the seat support 24 according to the embodiment of the present invention. is there.
In FIGS. 3 and 4, the bottom plate 18 and the cushion 20 of the seat 14 are not shown in order to make the structure of the seat support 24 easier to see.

まず、図３に示すように、座部支持部２４は、後脚４の上端と背凭れ１２の支持フレーム部１２ａの下端との間に連結される連結部３４と、椅子１の幅方向に延びる中心軸線を持つ円筒形に形成され連結部３４の前方に固定された支持部本体３６と、支持部本体３６に固定され、この支持部本体３６と共通の中心軸線を持ち且つ座部１４の幅方向内側に向かって延びる支持軸３８とを備えている。また、支持部本体３６の内側面（支持軸３８が延びている面）には、座部１４の前部が上方に揺動し座部１４がほぼ直立した位置（跳ね上げ位置）で座部１４を保持する突起４０（係止手段）が形成されている。 First, as shown in FIG. 3, the seat support 24 is connected to the connecting portion 34 connected between the upper end of the rear leg 4 and the lower end of the support frame 12 a of the backrest 12, and in the width direction of the chair 1. A support main body 36 formed in a cylindrical shape having a central axis extending and fixed to the front of the connecting portion 34, and fixed to the support main body 36, has a common central axis with the support main body 36, and has the seat 14. And a support shaft 38 extending inward in the width direction. In addition, on the inner side surface (the surface on which the support shaft 38 extends) of the support portion main body 36, the seat portion is in a position where the front portion of the seat portion 14 swings upward and the seat portion 14 is almost upright (the flip-up position). A protrusion 40 (locking means) for holding 14 is formed.

連結部３４は、長手方向に直交する断面が円形の円筒形状に形成されており、円形断面の半径は、後脚４及び背凭れ１２の支持フレーム部１２ａの円形断面の半径と等しい。また、連結部３４の上端及び下端は、それぞれ先細のテーパー状に形成されている。そして、連結部３４の下端が後脚４の上端に挿入され、連結部３４の上端が背凭れ１２の支持フレーム部１２ａの下端に挿入されることにより、後脚４、連結部３４、及び、支持フレーム部１２ａは、下からこの順序で互いに同軸上に連結される。 The connecting portion 34 is formed in a cylindrical shape having a circular cross section perpendicular to the longitudinal direction, and the radius of the circular cross section is equal to the radius of the circular cross section of the support frame portion 12 a of the rear leg 4 and the backrest 12. Moreover, the upper end and lower end of the connection part 34 are each formed in the taper taper shape. Then, the lower end of the connecting portion 34 is inserted into the upper end of the rear leg 4, and the upper end of the connecting portion 34 is inserted into the lower end of the support frame portion 12a of the backrest 12, so that the rear leg 4, the connecting portion 34, and The support frame portions 12a are coaxially connected to each other in this order from the bottom.

また、座部１４は、座部１４の後部の左右両側に配置された左右一対の軸受部４２（軸受）を備えている。座部１４の軸受部４２は、図３に示すように、座部１４の後部の左右両端において座部支持部２４の支持軸３８の中心軸線と直交するように形成された略矩形の平板部４４と、座部支持部２４の支持軸３８を受け入れるように平板部４４に形成された軸孔４６とを備えている。 The seat portion 14 includes a pair of left and right bearing portions 42 (bearings) disposed on the left and right sides of the rear portion of the seat portion 14. As shown in FIG. 3, the bearing portion 42 of the seat portion 14 is a substantially rectangular flat plate portion formed so as to be orthogonal to the central axis of the support shaft 38 of the seat portion support portion 24 at the left and right ends of the rear portion of the seat portion 14. 44 and a shaft hole 46 formed in the flat plate portion 44 so as to receive the support shaft 38 of the seat portion support portion 24.

さらに、図３及び図４に示すように、軸受部４２は、平板部４４の外周に固定されて平板部４４と共に支持軸３８周りに回動する略コ字形の嵌合板４８を備えている。嵌合板４８には、座部支持部２４の突起４０が嵌合可能な嵌合孔５０（係止手段）が形成されている。この嵌合孔５０は、嵌合孔５０及び軸孔４６の中心間距離が座部支持部２４における突起４０及び支持軸３８の中心間距離に等しく、且つ、座部１４の跳ね上げ位置（図４において仮想線により示す）において嵌合孔５０と座部支持部２４の突起４０とが整列する位置に形成されている。また、嵌合板４８の外側面（支持部本体３６の内側面と対向する面）には、嵌合孔５０及び軸孔４６の中心間距離に等しい半径の円弧状に延びる案内溝５２が形成されており、この案内溝５２内に座部支持部２４の突起４０が嵌まり込むようになっている。
これらの支持軸３８、突起４０、及び軸受部４２により、座部１４を使用位置と跳ね上げ位置との間で揺動可能とする回動機構が構成される。 Further, as shown in FIGS. 3 and 4, the bearing portion 42 includes a substantially U-shaped fitting plate 48 that is fixed to the outer periphery of the flat plate portion 44 and rotates around the support shaft 38 together with the flat plate portion 44. The fitting plate 48 is formed with a fitting hole 50 (locking means) into which the protrusion 40 of the seat support 24 can be fitted. In the fitting hole 50, the center-to-center distance between the fitting hole 50 and the shaft hole 46 is equal to the center-to-center distance between the protrusion 40 and the support shaft 38 in the seat support part 24, and the seat part 14 is flipped up (see FIG. In FIG. 4, the fitting hole 50 and the protrusion 40 of the seat support 24 are formed at positions where they are aligned. In addition, a guide groove 52 extending in an arc shape having a radius equal to the distance between the centers of the fitting hole 50 and the shaft hole 46 is formed on the outer surface of the fitting plate 48 (the surface facing the inner surface of the support body 36). The projection 40 of the seat support 24 is fitted into the guide groove 52.
The support shaft 38, the protrusion 40, and the bearing portion 42 constitute a rotation mechanism that can swing the seat portion 14 between the use position and the flip-up position.

次に、図５により、本発明の実施形態による椅子１をネスティングする際の動作について説明する。図５は、本発明の実施形態による２脚の椅子１をネスティングした状態を示す側面図である。
本実施形態の椅子１をネスティングする場合には、座部１４を使用位置から跳ね上げ位置へ移動させる。具体的には、まず、使用位置の座部１４の前部を上方へ持ち上げる。これにより、座部１４は、座部支持部２４の支持軸３８周りに上方へ揺動する。このとき、座部支持部２４の突起４０は、座部１４の軸受部４２の案内溝５２に沿って摺動する。座部１４を跳ね上げ位置（即ち、座部１４がほぼ直立した位置）まで揺動させると、座部支持部２４の突起４０が座部１４の軸受部４２の嵌合孔５０に嵌合し、これにより、座部１４が跳ね上げ位置で保持される。 Next, FIG. 5 demonstrates operation | movement at the time of nesting the chair 1 by embodiment of this invention. FIG. 5 is a side view showing a state in which the two chairs 1 according to the embodiment of the present invention are nested.
When nesting the chair 1 of the present embodiment, the seat 14 is moved from the use position to the flip-up position. Specifically, first, the front portion of the seat 14 at the use position is lifted upward. As a result, the seat 14 swings upward around the support shaft 38 of the seat support 24. At this time, the protrusion 40 of the seat support 24 slides along the guide groove 52 of the bearing 42 of the seat 14. When the seat portion 14 is swung to the flip-up position (that is, the position where the seat portion 14 is substantially upright), the protrusion 40 of the seat portion support portion 24 is fitted into the fitting hole 50 of the bearing portion 42 of the seat portion 14. Thereby, the seat part 14 is hold | maintained in the flip-up position.

上述したように、左右一対の後脚４間の距離は、左右一対の前脚２の幅方向外側面間の距離よりも大きくなっている。したがって、本実施形態の椅子１を前後方向に整列させて互いに接近させると、後方の椅子１の前脚２は前方の椅子１の後脚４の間を通過し、後方の椅子１の座部１４の底面が前方の椅子１の背凭れ１２の後面とほぼ接触する位置まで互いに接近させることができる。これにより、図５に示すように、複数の椅子１をネスティングすることができる。 As described above, the distance between the pair of left and right rear legs 4 is greater than the distance between the widthwise outer surfaces of the pair of left and right front legs 2. Therefore, when the chairs 1 of the present embodiment are aligned in the front-rear direction and approach each other, the front legs 2 of the rear chair 1 pass between the rear legs 4 of the front chair 1, and the seat 14 of the rear chair 1. Can be brought close to each other up to a position where the bottom surface of each of them is in contact with the rear surface of the back 12 of the chair 1 in front. Thereby, as shown in FIG. 5, a plurality of chairs 1 can be nested.

椅子１の座部１４を跳ね上げ位置から使用位置に戻す場合には、跳ね上げ位置の位置にある座部１４の前部を前下方へ押し下げるように力を加える。一定以上の力が加わると、座部１４の軸受部４２の嵌合孔５０に嵌合している突起４０が嵌合孔５０から離脱し、座部１４が下方へ揺動可能となる。これにより、座部１４は、座部支持部２４の支持軸３８周りに下方へ揺動する。座部１４を使用位置（即ち、座部１４が略水平の位置）まで揺動させると、座部１４の下面の当接部２２が連結フレーム１０の上面に当接する。これにより、座部１４が連結フレーム１０によって支持され、ユーザが着座可能になる。 When the seat portion 14 of the chair 1 is returned from the flip-up position to the use position, a force is applied so as to push down the front portion of the seat portion 14 at the position of the flip-up position. When a force exceeding a certain level is applied, the protrusion 40 fitted in the fitting hole 50 of the bearing portion 42 of the seat portion 14 is detached from the fitting hole 50, and the seat portion 14 can swing downward. As a result, the seat 14 swings downward around the support shaft 38 of the seat support 24. When the seat portion 14 is swung to the use position (that is, the seat portion 14 is substantially horizontal), the contact portion 22 on the lower surface of the seat portion 14 contacts the upper surface of the connection frame 10. Thereby, the seat part 14 is supported by the connection frame 10, and a user can sit down.

次に、上述した本発明の実施形態による椅子１の作用効果を説明する。
まず、本発明の実施形態によれば、突起４０及び嵌合孔５０は、座部１４の前部を上方に跳ね上げた跳ね上げ位置に座部１４を保持するので、座部１４を跳ね上げた状態で確実に保持することができる。また、突起４０及び嵌合孔５０は座席支持部２４及び軸受部４２に設けられているので、座部１４を跳ね上げ位置で保持するための構造を背凭れ１２や脚２、４に設ける必要がなく、コスト上昇を抑制し美観の悪化を抑制することができる。 Next, the effect of the chair 1 by embodiment of this invention mentioned above is demonstrated.
First, according to the embodiment of the present invention, the protrusion 40 and the fitting hole 50 hold the seat portion 14 in the flip-up position where the front portion of the seat portion 14 is flipped upward, so that the seat portion 14 is flipped up. It can be securely held in the state. Further, since the protrusion 40 and the fitting hole 50 are provided in the seat support portion 24 and the bearing portion 42, it is necessary to provide a structure for holding the seat portion 14 in the flip-up position on the backrest 12 and the legs 2 and 4. No increase in cost and deterioration of aesthetics can be suppressed.

また、座部１４を跳ね上げ位置まで揺動させると、突起４０が嵌合孔５０に嵌合して座部１４を跳ね上げ位置に保持し、跳ね上げ位置に保持されている座部１４を水平位置に向けて押し下げる力が加えられた場合、突起４０が嵌合孔５０から離脱することで跳ね上げ位置における保持状態が解除されるので、突起４０と嵌合孔５０という簡易な構造で座部１４を跳ね上げ位置に確実に保持できると共に、跳ね上げ位置における保持状態からの解除も容易に行うことができる。 Further, when the seat portion 14 is swung to the flip-up position, the protrusion 40 is fitted into the fitting hole 50 to hold the seat portion 14 in the flip-up position, and the seat portion 14 held in the flip-up position is moved. When a force to push down toward the horizontal position is applied, the protrusion 40 is released from the fitting hole 50 and the holding state in the flip-up position is released. The portion 14 can be reliably held at the flip-up position, and can be easily released from the holding state at the flip-up position.

また、座部１４の後部の左右両側部に設けられた一対の座部支持部２４のそれぞれに回動機構が設けられているので、座部１４の下面や脚２、４等に座部１４を回動させるための回動機構を設ける必要がなく、背凭れ１２と一体感のある位置において単純な構造で座部１４を支持することができ、これにより、コスト上昇を抑制しつつ美観を向上させることができる。
また、肘掛２６の下端部２８は、椅子１の幅方向外側から座部支持部２４に取り付けられているので、肘掛２６を取り付けるための取付構造を新たに背凭れ１２や脚に設ける必要がなく、これにより、コスト上昇や美観の悪化を抑制しつつ、肘掛２６を設けることができる。 Further, since a rotation mechanism is provided for each of the pair of seat support parts 24 provided on the left and right sides of the rear part of the seat 14, the seat 14 is provided on the lower surface of the seat 14, the legs 2, 4 and the like. It is not necessary to provide a turning mechanism for turning the seat, and the seat portion 14 can be supported with a simple structure at a position where the backrest 12 is united with the backrest 12, thereby improving aesthetics while suppressing an increase in cost. Can be improved.
Moreover, since the lower end part 28 of the armrest 26 is attached to the seat part support part 24 from the width direction outer side of the chair 1, it is not necessary to newly provide the mounting structure for attaching the armrest 26 to the backrest 12 or the leg. Thus, the armrest 26 can be provided while suppressing an increase in cost and deterioration in aesthetics.

特に、脚は、左右一対の前脚２と、左右一対の後脚４とを含み、背凭れ１２は、その左右両側のそれぞれから下方に延びる支持フレーム部１２ａを有し、座部支持部２４の後方には、背凭れ１２の支持フレーム部１２ａと後脚４とを連結する連結部３４が設けられ、後脚４、連結部３４、及び、支持フレーム部１２ａは、下からこの順序で互いに同軸上に連結されている。即ち、座部支持部２４は、後脚４の上端と背凭れ１２の支持フレーム部１２ａの下端との連結構造を兼ねているので、背凭れ１２及び後脚４と一体感のある位置において単純な構造で座部１４を支持することができ、これにより、美観を一層向上させることができる。 In particular, the leg includes a pair of left and right front legs 2 and a pair of left and right rear legs 4, and the backrest 12 has a support frame portion 12 a extending downward from each of the left and right sides thereof. On the rear side, a connecting portion 34 for connecting the support frame portion 12a of the backrest 12 and the rear leg 4 is provided. The rear leg 4, the connecting portion 34, and the support frame portion 12a are coaxial with each other in this order from below. It is linked to the top. That is, the seat portion support portion 24 also serves as a connection structure between the upper end of the rear leg 4 and the lower end of the support frame portion 12a of the backrest 12, so that the seat support portion 24 is simple at a position where the backrest 12 and the rear leg 4 are united. The seat portion 14 can be supported with a simple structure, which can further improve the aesthetic appearance.

以上、本発明の実施形態を説明したが、本発明の具体的な構成及び手段は、特許請求の範囲に記載した各発明の技術的思想の範囲内において、任意に改変及び改良することができる。 Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. .

まず、上記の説明では、左右の肘掛２６が、それぞれ、椅子１の幅方向外側から左右の座部支持部２４に固定されている例を説明したが、図６に示すように、肘掛２６に代えてテーブル５４を設けてもよい。図６は、本発明の実施形態の変形例による椅子１を右前方から見た斜視図である。
具体的には、テーブル５４の支持アーム５６の下端を椅子１の幅方向外側から右側の座部支持部２４に固定する。支持アーム５６は下端から前上方へ延び、支持アーム５６の上端にテーブル５４の天板５８が固定される。また、支持アーム５６の中間部から下方へ補強アーム６０が延びており、この補強アーム６０の下端は、前脚２の上部に固定される。支持アーム５６の下端の固定構造は、肘掛２６の下端の固定構造と同じ構造になっており、必要に応じて肘掛２６とテーブル５４とを交換することが可能である。 First, in the above description, the example in which the left and right armrests 26 are fixed to the left and right seat support portions 24 from the outside in the width direction of the chair 1 has been described, but as shown in FIG. Instead, a table 54 may be provided. FIG. 6 is a perspective view of the chair 1 according to the modification of the embodiment of the present invention as viewed from the right front.
Specifically, the lower end of the support arm 56 of the table 54 is fixed to the right seat support 24 from the outside in the width direction of the chair 1. The support arm 56 extends forward and upward from the lower end, and the top plate 58 of the table 54 is fixed to the upper end of the support arm 56. Further, a reinforcing arm 60 extends downward from an intermediate portion of the support arm 56, and a lower end of the reinforcing arm 60 is fixed to an upper portion of the front leg 2. The fixing structure of the lower end of the support arm 56 is the same as the fixing structure of the lower end of the armrest 26, and the armrest 26 and the table 54 can be exchanged as necessary.

また、上記の説明では、椅子１は、左右一対の前脚２及び左右一対の後脚４を備えていると説明したが、これとは異なる構成の脚を備えるようにしてもよい。例えば、座部１４を水平方向に回転可能に支持する５本脚や６本脚の回転脚を備えるようにしてもよい。この場合においても、上記と説明と同様の座部支持部２４及び軸受部４２を用いることができる。 In the above description, the chair 1 is described as including the pair of left and right front legs 2 and the pair of left and right rear legs 4. However, the chair 1 may include legs having different configurations. For example, a five-legged or six-legged rotating leg that supports the seat 14 so as to be rotatable in the horizontal direction may be provided. Also in this case, the seat support part 24 and the bearing part 42 similar to those described above can be used.

また、上記の説明では、座部１４の後部の左右両側部に設けられた一対の座部支持部２４のそれぞれに回動機構が設けられていると説明したが、座部１４の下方中央部に座部支持部２４及び回動機構を設けてもよい。 Further, in the above description, it has been described that each of the pair of seat support portions 24 provided on the left and right sides of the rear portion of the seat portion 14 is provided with a rotation mechanism. The seat support 24 and the rotation mechanism may be provided.

１椅子
２前脚
４後脚
６キャスター
８屈曲部
１０連結フレーム
１２背凭れ
１２ａ支持フレーム部
１４座部
１６座部フレーム
１８底板
２０クッション
２２当接部
２４座部支持部
２６肘掛
２８下端部
３０支柱部
３２肘掛本体
３４連結部
３６支持部本体
３８支持軸
４０突起（係止手段）
４２軸受部（軸受）
４４平板部
４６軸孔
４８嵌合板
５０嵌合孔（係止手段）
５２案内溝
５４テーブル
５６支持アーム
５８天板
６０補強アーム DESCRIPTION OF SYMBOLS 1 Chair 2 Front leg 4 Rear leg 6 Caster 8 Bending part 10 Connection frame 12 Backrest 12a Support frame part 14 Seat part 16 Seat part frame 18 Bottom plate 20 Cushion 22 Contact part 24 Seat part support part 26 Armrest 28 Lower end part 30 Brace part 32 Armrest body 34 Connecting portion 36 Support portion body 38 Support shaft 40 Projection (locking means)
42 Bearing part (bearing)
44 Flat plate portion 46 Shaft hole 48 Fitting plate 50 Fitting hole (locking means)
52 Guide Groove 54 Table 56 Support Arm 58 Top Plate 60 Reinforcing Arm

Claims

A chair having a leg, a seat and a backrest,
The seat is configured to be swingable with respect to the legs via a rotation mechanism so as to be swingable between a horizontal position in use and a flip-up position where the front part of the seat is flipped upward. Installed,
The rotation mechanism includes a locking unit that holds the seat portion in the flip-up position.
A chair characterized by that.

The rotation mechanism includes a shaft provided on one of the seat portion or the leg, and a bearing provided on the other of the seat portion or the leg to receive the shaft,
The locking means includes a protrusion that rotates with one of the shaft or the bearing of the rotation mechanism, and a fitting hole that rotates with the other of the shaft or the bearing,
When the seat is in the flip-up position, the protrusion is fitted into the fitting hole so as to hold the seat in the flip-up position, and the seat is held in the flip-up position. When a force to push down toward the horizontal position is applied, the detachment from the fitting hole,
The chair according to claim 1.

Furthermore, it has a pair of seat part support part provided in each of the right and left both sides of the rear part of the said seat part, The said rotation mechanism is provided in each of the said seat part support part,
Furthermore, it has a pair of left and right armrests, and the lower end portion of the armrests is attached to the seat support portion from the outside in the width direction of the chair.
The chair according to claim 1 or 2, characterized in that.

The legs include a pair of left and right front legs and a pair of left and right rear legs.
The backrest has a support frame portion extending downward from each of the left and right sides,
At the rear of the seat support part, a connecting part for connecting the back support frame part and the rear leg is provided,
The rear leg, the connecting portion, and the support frame portion are coaxially connected to each other in this order from below.
The chair according to claim 3.