JP2021061969A - Folding chair - Google Patents

Folding chair Download PDF

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JP2021061969A
JP2021061969A JP2019187511A JP2019187511A JP2021061969A JP 2021061969 A JP2021061969 A JP 2021061969A JP 2019187511 A JP2019187511 A JP 2019187511A JP 2019187511 A JP2019187511 A JP 2019187511A JP 2021061969 A JP2021061969 A JP 2021061969A
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legs
peripheral surface
chair
seat
inner peripheral
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JP7296188B2 (en
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渉 野溝
Wataru Nomizo
渉 野溝
岡本 功
Isao Okamoto
功 岡本
和幸 堀内
Kazuyuki Horiuchi
和幸 堀内
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Takano Co Ltd
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Takano Co Ltd
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Abstract

To incorporate a mechanism for keeping a folded state in a structure of a folding chair itself.SOLUTION: In a chair which constitutes a seat and a backrest by spreading a belt-like member between a pair of frames of intersecting legs and is foldable by changing an intersecting angle between the frames, the intersecting legs 13R, 13L are rotatably coupled to an intersecting place of the legs (a coupling place where a box nut 37 is located), and a stopper mechanism 20 which generates resistance to prevent the legs 13R, 13L from opening is incorporated in the intersecting place.SELECTED DRAWING: Figure 1

Description

本発明は、折り畳み椅子に関するものである。さらに詳述すると、本発明は、布地を張ることで座及び背凭れを形成する折り畳み椅子に関するものである。 The present invention relates to a folding chair. More specifically, the present invention relates to a folding chair in which a seat and a backrest are formed by stretching a cloth.

従来から、開閉可能なX形のパイプフレームの間に布地を張ることで座及び背凭れを形成する折り畳み椅子は、持ち運び容易なことから、キャンピングチェアなどとして広く使われている。この種の折り畳み椅子は、従来から、左右の脚あるいは前後の脚を交差させた状態で着座することができ、交差した脚の交差角度を変更する(伸ばす)ことで、折り畳みを可能とするものである。 Conventionally, a folding chair that forms a seat and a backrest by stretching a cloth between an X-shaped pipe frame that can be opened and closed has been widely used as a camping chair because it is easy to carry. Traditionally, this type of folding chair can be seated with the left and right legs or front and rear legs crossed, and can be folded by changing (extending) the crossing angle of the crossed legs. Is.

これら折り畳み椅子において、折り畳んだ状態を維持するために保持部いわゆるロック部材を設け、保持部・ロック部材を利用することで折り畳み状態を保持する椅子も存在する(例えば特許文献1,2)。 In these folding chairs, there is also a chair in which a holding portion, a so-called lock member, is provided to maintain the folded state, and the folded state is held by using the holding portion / lock member (for example, Patent Documents 1 and 2).

特開2002−360371号公報Japanese Unexamined Patent Publication No. 2002-360371 特開2017−12229号公報JP-A-2017-12229

しかしながら、従来の折り畳み椅子には、折り畳んだ状態で付属するバンドなどで閉じた脚同士を固定する手法が採られているが、椅子そのものに簡易的な固定手段を有するものはない。つまり、いずれのロック部材も、折り畳み椅子自体の構造の中に組み込まれたものではなく、後付け可能なオプションに関するものである。折り畳み椅子においては、折り畳み状態を保持しつづめることはそこまで求められていないためである。 However, although conventional folding chairs employ a method of fixing closed legs with a band or the like attached in a folded state, none of the chairs themselves have a simple fixing means. That is, neither locking member is built into the structure of the folding chair itself, but rather a retrofittable option. This is because in a folding chair, it is not required to maintain the folded state and continue.

一方、オフィスにおける椅子に対しても、昨今、多様性が求められている。所謂、簡易折り畳み椅子のような形態を採りながら、耐久性に優れ、オフィス内での使用ニーズに沿った使い勝手の良い、折り畳み椅子が求められている。 On the other hand, the chairs in the office are also required to be diverse these days. There is a demand for a folding chair that takes the form of a so-called simple folding chair, has excellent durability, and is easy to use according to the needs for use in the office.

本発明は、折り畳み椅子自体の構造の中に折り畳み状態を保持する機構を組み込んだ椅子を提供することを目的とする。 An object of the present invention is to provide a chair in which a mechanism for holding a folded state is incorporated in the structure of the folding chair itself.

かかる目的を達成するための折り畳み椅子は、脚が交差する一対のフレーム間に帯状部材を張って座並びに背凭れを構成する一方、フレーム間の交差角度を変更することにより折り畳み可能な椅子において、脚の交差箇所に、交差する脚を回転可能に連結する一方で、脚が開かないように抵抗を発生させるストッパ機構を組み込むようにしている。 A folding chair for achieving such an object is a chair that can be folded by changing the crossing angle between the frames while forming a seat and a backrest by stretching a band-shaped member between a pair of frames in which the legs intersect. At the intersection of the legs, a stopper mechanism is incorporated to generate resistance so that the legs do not open while the intersecting legs are rotatably connected.

ここで、ストッパ機構は、一方の脚にフィットする第1の部材と、他方の脚にフィットする第2の部材と、第1の部材と前記第2の部材との間に配置されて相手側部材の内周面の溝に嵌合して抵抗を発生させて回転を止める第3の部材及び第3の部材を常時径方向外側に向けて付勢する弾性部材とで構成され、第1の部材と第2の部材とのいずれか一方に第3の部材を供回りさせると共に、他方の部材の内周面に第3の部材の外周面を弾性部材で押しつけて摩擦抵抗を発生させることが好ましい。 Here, the stopper mechanism is arranged between the first member that fits one leg, the second member that fits the other leg, and the first member and the second member on the other side. It is composed of a third member that fits into a groove on the inner peripheral surface of the member to generate resistance and stops rotation, and an elastic member that constantly urges the third member outward in the radial direction. It is possible to rotate the third member to either one of the member and the second member, and to generate frictional resistance by pressing the outer peripheral surface of the third member against the inner peripheral surface of the other member with an elastic member. preferable.

また、ストッパ機構の第1の部材は内部空間に第3の部材を回転可能に収容すると共に第3の部材の径方向凸部と嵌合する複数の溝を伴う内周面を有し、他方、第2の部材には、第1の部材の内周面の一部と摺接するガイド弧と、第3の部材の軸方向突起と係合する凹部とを有し、第1の部材と第2の部材との間に相対回転が起こると、軸方向突起と凹部との係合により第2の部材と回転方向に連動する第3の部材が回転させられて第1の部材の内周面の溝を乗り越えて回転して、次の溝に嵌まり込んで固定されることにより、回転と回転に対する抵抗を付加する構造を構成していることが好ましい。 Further, the first member of the stopper mechanism has an inner peripheral surface having a plurality of grooves for rotatably accommodating the third member in the internal space and fitting with the radial convex portion of the third member. The second member has a guide arc that is in sliding contact with a part of the inner peripheral surface of the first member and a recess that engages with the axial protrusion of the third member, and the first member and the first member. When relative rotation occurs between the two members, the engagement between the axial protrusion and the recess causes the second member and the third member linked in the rotation direction to rotate, and the inner peripheral surface of the first member. It is preferable to construct a structure that adds resistance to rotation and rotation by rotating over the groove of one and fitting into the next groove to be fixed.

また、脚は少なくとも交差箇所より下の部分では左右方向の外に向けて広がり、左右の脚の接地部分の間の間隔を開けたままの状態で折り畳み状態となり、自立可能であることが好ましい。 Further, it is preferable that the legs spread outward in the left-right direction at least in the portion below the intersection, and are in a folded state with a gap between the ground contact portions of the left and right legs, and can stand on their own.

また、左右の脚または前後の脚の接地部は、一方が他方に比べて広く他方が一方に比べて狭く、折り畳んで自立する際に、開いた左右の脚の間に他の椅子の一方の脚を差し込んで水平スタッキングを可能とすることが好ましい。 Also, the ground contact between the left and right legs or the front and rear legs is wider on one side than the other and narrower on the other side, and when folded and self-supporting, one of the other chairs is opened between the left and right legs. It is preferable to insert the legs to enable horizontal stacking.

請求項1記載の折り畳み椅子によれば、脚の交差箇所に、交差する脚を回転可能に連結する一方で、脚が開かないように抵抗を発生させるストッパ機構を組み込むようにしているので、折り畳み状態を保持しつづけることができる。しかも、後付けでの他の部品を必要としない。 According to the folding chair according to claim 1, the intersecting legs are rotatably connected to each other at the intersection of the legs, and a stopper mechanism for generating resistance is incorporated so as not to open the legs. It can keep the state. Moreover, it does not require any other parts to be retrofitted.

本発明にかかる折り畳み椅子の一実施形態を示す後から見た斜視図である。It is a rear view which shows one Embodiment of the folding chair which concerns on this invention. 同椅子の側面図である。It is a side view of the chair. 同椅子の水平スタッキング状態を例示する正面図である。It is a front view which illustrates the horizontal stacking state of the chair. ストッパ機構と脚フレームとの分解斜視図である。It is an exploded perspective view of a stopper mechanism and a leg frame. ストッパ機構の右側から見た分解斜視図である。It is an exploded perspective view seen from the right side of a stopper mechanism. ストッパ機構の左側から見た分解斜視図である。It is an exploded perspective view seen from the left side of a stopper mechanism. 同椅子の背凭れ取付構造の一実施形態を示す図で、(A)は背桿部に背凭れの袋部を装着する途中を示し、(B)は装着完了後の固定状態を示す。In the figure which shows one Embodiment of the backrest attachment structure of the chair, (A) shows the process of attaching the bag part of the backrest to the back rod part, and (B) shows the fixed state after the attachment is completed. 背座フレームと脚フレームとを連結するヒンジ部分を示す斜視図である。It is a perspective view which shows the hinge part which connects a back seat frame and a leg frame. ヒンジの樹脂製のキャップを示す斜視図である。It is a perspective view which shows the resin cap of a hinge. 切断された座桿部と連結具の一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the cut seat rod part and a connector. 連結具の組立状態を示す斜視図である。It is a perspective view which shows the assembled state of a connector. 連結具の分解状態を左側から見て示す斜視図である。It is a perspective view which shows the disassembled state of a connector from the left side. 連結具の分解状態を右側から見て示す斜視図である。It is a perspective view which shows the disassembled state of a connector from the right side.

以下、本発明の構成を図面に示す実施形態に基づいて詳細に説明する。尚、本明細書において、前後左右の方向は着座者を中心に定められており、「前あるいは前方」とは肘掛け,座及び背凭れのそれぞれにおいて椅子及び当該椅子の座に座った着座者にとっての前あるいは前向きであり、「後あるいは後方」とは同様に椅子及び着座者にとっての後あるいは後向きである。また、前後方向と水平面内において直交する方向が肘掛け,座及び背凭れのそれぞれにおいて着座者にとっての左右方向であり、椅子の幅方向である。さらに、「上」及び「下」は肘掛け,座及び背凭れのそれぞれにおいて椅子及び着座者にとっての上及び下であり、鉛直面内の上と下である。 Hereinafter, the configuration of the present invention will be described in detail based on the embodiments shown in the drawings. In this specification, the front-back and left-right directions are defined centering on the seated person, and "front or front" means the chair and the seated person sitting on the chair in each of the armrest, the seat, and the backrest. Is forward or forward, and "rear or backward" is also backward or backward for the chair and seated person. Further, the directions orthogonal to the front-rear direction in the horizontal plane are the left-right directions for the seated person in each of the armrest, the seat and the backrest, and are the width directions of the chair. In addition, "above" and "below" are above and below for the chair and seater in the armrests, seat and backrest, respectively, above and below in the vertical plane.

図1に、本発明の折り畳み椅子の実施形態の一例を示す。この実施形態にかかる折り畳み椅子は、脚が交差し交差角度を変更することで折り畳み可能な左右に開閉するタイプの折り畳み椅子であって、脚途中で交差する一対のフレーム1の座桿部11並びに背桿部9の間に帯状部材2,3を掛け渡し、脚フレームの交差角度を広げたとき(所謂脚を開いたとき)に帯状部材を張って座2及び背凭れ3を形成するようにしたものである。尚、本明細書においては、脚を総称して説明するときには符号13、脚フレームを右と左で区別するときには13R,13Lを付して説明する。 FIG. 1 shows an example of an embodiment of the folding chair of the present invention. The folding chair according to this embodiment is a type of folding chair that opens and closes to the left and right so that the legs intersect and can be folded by changing the crossing angle. Band-shaped members 2 and 3 are hung between the back rods 9, and when the crossing angle of the leg frame is widened (so-called legs are opened), the band-shaped members are stretched to form the seat 2 and the backrest 3. It was done. In this specification, reference numerals 13 will be attached when the legs are generically described, and 13R and 13L will be added when the leg frames are distinguished by right and left.

帯状部材は、椅子の座及び背凭れとして十分な強度と折り畳み可能な素材例えば帆布やキャンバス地などと呼ばれる強度に優れる織地やナイロン織地などの使用が好ましい。特に、帆布は滑りもなく強度に優れると共にナチュラルな雰囲気を醸しだし、安らぎを与えるので好ましいことから、本実施形態では帆布を使用している。 As the band-shaped member, it is preferable to use a material having sufficient strength as a seat and a backrest of a chair and a foldable material such as a woven fabric or a nylon woven fabric having excellent strength such as canvas or canvas. In particular, the canvas is not slippery, has excellent strength, creates a natural atmosphere, and is preferable because it provides comfort. Therefore, the canvas is used in the present embodiment.

フレーム1は、本実施形態の場合、座から上の背座部分12と、座より下の脚部分(以下、脚フレーム13と呼ぶ)とで構成され、ヒンジ14を介して前後方向の水平軸回りに回転可能に連結されている。背座フレーム12は、肘掛け並びに背凭れ及び座を帆布との間で構成し、脚フレーム13はX形に連結されて開閉可能な構造とされている。そして、脚フレーム13を閉じたときには脚フレーム13と連続的に鉛直方向を向き、脚フレーム13を開いたときには脚フレーム13と交差するようにして鉛直方向に向くように構成されている。 In the case of the present embodiment, the frame 1 is composed of a back seat portion 12 above the seat and a leg portion below the seat (hereinafter, referred to as a leg frame 13), and a horizontal axis in the front-rear direction via a hinge 14. It is rotatably connected around. The back seat frame 12 has an armrest, a backrest, and a seat formed between the canvas, and the leg frame 13 is connected in an X shape so as to be openable and closable. When the leg frame 13 is closed, the leg frame 13 is continuously oriented in the vertical direction, and when the leg frame 13 is opened, the leg frame 13 is configured to intersect the leg frame 13 and be oriented in the vertical direction.

フレーム1は、特定の素材に限定されるものでは無いが、アルミパイプでは強度不足となり、樹脂パイプでも強度を確保するには重量が嵩むことから、金属製パイプの使用が好ましく、より好ましくはスティールパイプを使用することである。例えば、厚み1.0mm程度のスティールパイプの使用は、軽さと強度を併せ持つことから好ましい。 The frame 1 is not limited to a specific material, but an aluminum pipe is insufficient in strength, and a resin pipe is heavy in order to secure strength. Therefore, it is preferable to use a metal pipe, and more preferably steel. Is to use a pipe. For example, the use of a steel pipe having a thickness of about 1.0 mm is preferable because it has both lightness and strength.

脚フレーム13は、椅子を折り畳むため、交差させる必要がある。そこで、左右一対を成す脚フレーム13は、右側に接地する脚フレーム(以下、右脚フレーム13Rと呼ぶ)と左側に接地する脚フレーム(以下、左脚フレーム13Lと呼ぶ)とでは、長さ(ヒンジから接地部までの距離)は同じでありながら、いずれか一方例えば右脚フレーム13Rの前後方向(奥行き方向)の寸法が他方例えば左脚フレーム13Lよりも狭く(あるいは広く)、交差する状態で少なくとも交差する範囲においては両者の間に隙間が発生するように設定することが必要である。これによって、左右の脚フレーム13R,13Lを交差させて交差する箇所で連結することができる。 The leg frames 13 need to be crossed in order to fold the chair. Therefore, the leg frame 13 forming a pair of left and right has a length (hereinafter referred to as a left leg frame 13L) between the leg frame touching the right side (hereinafter referred to as the right leg frame 13R) and the leg frame touching the left side (hereinafter referred to as the left leg frame 13L). The distance from the hinge to the ground contact portion) is the same, but one of them, for example, the right leg frame 13R in the front-rear direction (depth direction) is narrower (or wider) than the other, for example, the left leg frame 13L, and intersects. It is necessary to set so that a gap is generated between the two at least in the intersecting range. As a result, the left and right leg frames 13R and 13L can be crossed and connected at the intersecting points.

また、一方例えば右脚フレーム13Rの接地する部分41も他方例えば左脚フレーム13Lの接地する部分よりも狭く形成されている。これによって、折り畳んで自立する椅子の左右の脚フレーム13R,13Lの間に、隣る椅子の一方の脚フレーム例えば右脚フレーム13Rを挿し入れることを可能とする。つまり、開いた左右の脚の間に他の椅子の脚を差し込んで水平スタッキングさせることができる。 Further, on the one hand, for example, the grounded portion 41 of the right leg frame 13R is also formed narrower than the grounded portion of the left leg frame 13L, for example. This makes it possible to insert one leg frame of the adjacent chair, for example, the right leg frame 13R, between the left and right leg frames 13R and 13L of the foldable and self-supporting chair. That is, the legs of another chair can be inserted between the left and right legs that are open for horizontal stacking.

また、脚フレーム13は、前後方向の安定を得るために、特に接地する部分41の長さを長くするため、交差箇所(つまり、連結箇所であり、連結ピン37で示される位置)よりも下の脚部分を前後方向に張り出させて前後方向における長さを拡張するように設けられている。つまり、脚フレーム13の交差箇所よりも下では、広い接地領域(接地点間距離)が得られるように配慮されている。また、脚フレーム13の接地する辺には例えばフローリングやPタイルなどの上で滑り難くするため、滑り止めのブロック42が必要に応じて取り付けられる。 Further, the leg frame 13 is below the intersection (that is, the connection point and the position indicated by the connection pin 37) in order to obtain stability in the front-rear direction and to increase the length of the grounding portion 41 in particular. The legs are provided so as to extend in the front-rear direction to extend the length in the front-rear direction. That is, consideration is given so that a wide ground contact area (distance between ground contact points) can be obtained below the intersection of the leg frames 13. Further, a non-slip block 42 is attached to the grounded side of the leg frame 13 as needed to prevent slipping on, for example, flooring or P tiles.

パイプフレーム1は、互いに平行に配置されて座2と背3とを形成する背座フレーム12と、X形に交差する脚フレーム13とを有し、連結部品を兼ねるストッパ機構20で開閉可能に連結されている。背座フレーム12は、本実施形態の場合、背凭れ3を形成する帆布を取り付ける背桿部9と、座2を形成する帆布を取り付ける座桿部11と肘掛けを構成する肘桿部10とが1本のパイプによって連続的に一体に形成されている。他方、脚フレーム13は、図3に示すように、正面から見て直線状に形成されずに僅かに例えば10〜20°程度折り曲げられている。本実施形態の場合、160〜170°程度の挟角を有するように折り曲げられている。このため、脚フレーム13の交差角度を狭くして椅子を折り畳む際に、連結箇所37よりも上の脚フレーム13並びに背座フレーム12では互いに接近して平行に間隔を狭めるが、連結箇所37より下の脚フレーム13部分では外に向けて広がっているので交差角度を狭めても完全に平行となることがなく、左右の脚フレーム13R,13Lの接地部分41の間の間隔を開けたままの状態となる。このため、折り畳み椅子は、自立することができる。本実施形態の場合、脚フレーム13の折り曲げ箇所は連結箇所37よりも僅かに上の位置とされているが、これに特に限られるものではなく、場合によっては連結箇所37よりも下の位置で外に広がるように折り曲げられても良い。 The pipe frame 1 has a back seat frame 12 which is arranged parallel to each other to form a seat 2 and a back 3, and a leg frame 13 which intersects an X shape, and can be opened and closed by a stopper mechanism 20 which also serves as a connecting part. It is connected. In the case of the present embodiment, the back seat frame 12 includes a back rod portion 9 to which the canvas forming the backrest 3 is attached, a seat rod portion 11 to which the canvas forming the seat 2 is attached, and an elbow rod portion 10 forming the armrest. It is continuously and integrally formed by one pipe. On the other hand, as shown in FIG. 3, the leg frame 13 is not formed in a straight line when viewed from the front, but is slightly bent, for example, about 10 to 20 °. In the case of this embodiment, it is bent so as to have a narrowing angle of about 160 to 170 °. Therefore, when the chair is folded by narrowing the crossing angle of the leg frame 13, the leg frame 13 and the back seat frame 12 above the connecting portion 37 approach each other and narrow the distance in parallel, but from the connecting portion 37. Since the lower leg frame 13 part spreads outward, it does not become completely parallel even if the crossing angle is narrowed, and the space between the ground contact parts 41 of the left and right leg frames 13R and 13L remains open. It becomes a state. Therefore, the folding chair can stand on its own. In the case of the present embodiment, the bent portion of the leg frame 13 is located slightly above the connecting portion 37, but the present invention is not particularly limited to this, and in some cases, the bent portion is located below the connecting portion 37. It may be bent so as to spread out.

座2は、例えば帯状の帆布から成り、その両端を折り返して筒状に縫製した取付筒部43をフレームの座桿部11に通すことで支持される。取付筒部43は、座桿部11に備えられている前後2箇所のヒンジ14を露出させるため、ヒンジ14を貫通させるべく刳り貫かれた孔部(以下、脚貫通孔44と呼ぶ)を2箇所に有する。 The seat 2 is supported by, for example, made of a strip-shaped canvas, and the mounting cylinder portion 43 having both ends folded back and sewn into a tubular shape is passed through the seat rod portion 11 of the frame. In order to expose the two front and rear hinges 14 provided on the seat rod portion 11, the mounting cylinder portion 43 has 2 holes (hereinafter referred to as leg through holes 44) hollowed out to allow the hinges 14 to penetrate. Have in place.

ここで、本実施形態の座桿部11には予め縫製された帆布製の座2の端の取付筒部43を通すために、図10に示すように、座桿部11が分割可能に形成されている。例えば、座布の脚貫通孔44と脚貫通孔44との間の取付筒部43で覆い隠される部分で座桿部11が分割され、座布の取付筒部43を通した後に分割された部分を連結具45で連結して一体化し、分割線が外観に現れないように配慮されている。連結具45は、図11に示すように、斜めの分割線に沿って分割可能な一対のピース46,47を嵌合させることで一体化する。例えば、一方のピース46には斜面52と直交する方向に図示していないビスを貫通させるためのビス頭を収める皿孔48と、ビスを通過させる筒部51とを有し、他方のピース47にはビスをねじ込む雌ねじを切った筒部50を備えている。筒部50,51はともに斜面52から僅かにはみ出させるように形成されており、筒部51,52が互いに反対側のピース46,47の斜面52に形成された凹部54,55に嵌合させるようにして斜面を突き合わせた状態で径方向にビス(図示省略)を通してビス止めすることで一体化される。これらピース46,47の座杆部11のパイプに嵌め込まれる側の面には、パイプに嵌合される突起例えば本実施形態では十字型の突起(ボス部)53がそれぞれ形成されており、この十字型の突起53の部分をパイプに圧入させて嵌合させることで調整回転可能な程度の嵌め合いで装着される。 Here, as shown in FIG. 10, the seat rod portion 11 is formed in a divisible manner in order to pass the mounting cylinder portion 43 at the end of the canvas seat 2 sewn in advance through the seat rod portion 11 of the present embodiment. Has been done. For example, the seat rod portion 11 is divided at a portion covered by the mounting cylinder portion 43 between the leg through hole 44 and the leg through hole 44 of the seat cloth, and the seat rod portion 11 is divided after passing through the mounting cylinder portion 43 of the seat cloth. The portions are connected and integrated by the connecting tool 45 so that the dividing line does not appear in the appearance. As shown in FIG. 11, the connector 45 is integrated by fitting a pair of pieces 46, 47 that can be divided along an oblique dividing line. For example, one piece 46 has a countersunk hole 48 for accommodating a screw head for passing a screw (not shown) in a direction orthogonal to the slope 52, and a tubular portion 51 for passing the screw, and the other piece 47 has. Is provided with a tubular portion 50 having a female thread into which a screw is screwed. Both the tubular portions 50 and 51 are formed so as to slightly protrude from the slope 52, and the tubular portions 51 and 52 are fitted into the recesses 54 and 55 formed on the slope 52 of the pieces 46 and 47 opposite to each other. In this way, the slopes are butted against each other and screwed through a screw (not shown) in the radial direction to integrate them. A protrusion fitted to the pipe, for example, a cross-shaped protrusion (boss portion) 53 in the present embodiment, is formed on the surface of the seat portions 11 of the pieces 46 and 47 on the side to be fitted into the pipe. By press-fitting the cross-shaped protrusion 53 into the pipe to fit the pipe, the cross-shaped protrusion 53 is fitted so as to be adjustable and rotatable.

したがって、帆布製の座2のフレーム1への組立は、まず、背座フレーム12の座桿部11の分断部位を開いてから帆布製の座2の端の取付筒部43を座桿部11に差し入れる。その後、帆布製の座2の端の取付筒部43を手繰り寄せた状態のまま、座桿部11の分断部位に連結具45を分解した状態でそれぞれ装着して隙間を埋める。切り離されたパイプの間を僅かに開いた状態で両ピース46,47の突起53をそれぞれパイプ内に嵌め込んでから、斜面を密着させるように両ピース46,47を突き合わせる。連結具45は、向かい合わせとなっている斜面52を密着させるように合わせることで、筒部50,51と凹部54,55とが嵌合されて、図示していない締結ビスを通すねじ孔とばか孔とが一軸上に配置されるので、皿孔48から締結ビスをねじ込んで両ピース46,47を連結することができる。この連結具45により、パイプフレームの座桿部11の強度が担保される。また、切断されたパイプ端面が帆布に当たって帆布が傷つくのを防止すること(帆布保護)ができる。さらに、帆布に覆われて外観的にも、パイプに継ぎ目がなく、繋がっているように見える。 Therefore, in assembling the canvas seat 2 to the frame 1, first, the divided portion of the seat rod portion 11 of the back seat frame 12 is opened, and then the mounting cylinder portion 43 at the end of the canvas seat 2 is attached to the seat rod portion 11. Insert into. After that, while the mounting cylinder portion 43 at the end of the seat 2 made of canvas is pulled by hand, the connecting tool 45 is attached to the divided portion of the seat rod portion 11 in a disassembled state to fill the gap. The protrusions 53 of both pieces 46 and 47 are fitted into the pipes with the separated pipes slightly open, and then the pieces 46 and 47 are butted against each other so that the slopes are brought into close contact with each other. The connecting tool 45 is fitted with the tubular portions 50 and 51 and the recesses 54 and 55 by aligning the slopes 52 facing each other so as to be in close contact with each other, and has a screw hole through which a fastening screw (not shown) is passed. Since the fool holes are arranged on one axis, the fastening screws can be screwed through the countersunk holes 48 to connect the two pieces 46 and 47. The connecting tool 45 ensures the strength of the seat rod portion 11 of the pipe frame. In addition, it is possible to prevent the cut pipe end face from hitting the canvas and damaging the canvas (canvas protection). In addition, the pipes are seamless and appear to be connected, even in appearance, covered with canvas.

背座フレーム12と脚フレーム13とを連結するヒンジ14には、樹脂部品を間に設けることで隙間を少なくして指が入らないように配慮されている。即ち、図8及び図9に示すように、脚フレーム13の頂部に樹脂製のキャップ16を嵌め、相手側取付金具15と接触させることで、隙間が生じないようにヒンジ14が構成されている。樹脂製のキャップ16は、図9に示すように、脚フレーム13と平行な面19aと折り曲げられたときに背座フレーム12側の相手側取付金具15の正面15aと平行な面(回転軌跡に対して接線方向となる面)19bとが形成されている。したがって、背座フレーム12の座桿部11に溶接付などで固着される箱形(コ形)の相手側取付金具15と、脚フレーム13の上端に被せられている樹脂製のキャップ16との間には、指を詰めるような隙間が空くようにことがない。また、相手側取付金具15の内面が面19a,19bに当接することで、回転の両端のストッパとなる。尚、図中の符号17は連結ピン、18は連結ピン17を通す孔である。 The hinge 14 that connects the back seat frame 12 and the leg frame 13 is provided with a resin component in between to reduce the gap and prevent fingers from entering. That is, as shown in FIGS. 8 and 9, the hinge 14 is configured so that a gap is not generated by fitting the resin cap 16 on the top of the leg frame 13 and bringing it into contact with the mating side mounting bracket 15. .. As shown in FIG. 9, the resin cap 16 has a surface parallel to the surface 19a parallel to the leg frame 13 and a surface parallel to the front surface 15a of the mating side mounting bracket 15 on the back seat frame 12 side (in the rotation locus). On the other hand, a tangential surface) 19b is formed. Therefore, the box-shaped (U-shaped) mating side mounting bracket 15 fixed to the seat rod portion 11 of the back seat frame 12 by welding or the like, and the resin cap 16 covering the upper end of the leg frame 13 There is no gap between them that can be used to squeeze your fingers. Further, the inner surface of the mating side mounting bracket 15 comes into contact with the surfaces 19a and 19b to serve as stoppers at both ends of the rotation. Reference numeral 17 in the drawing is a connecting pin, and 18 is a hole through which the connecting pin 17 is passed.

背凭れ3は、帯状の帆布から成り、図1に示すように、左右の背座フレーム12の背桿部9に両端の筒状の袋部4を被せて支持させるようにしている。袋部4は、帯状の帆布の両端を折り返して縫製したものであって、背桿部9を突き抜けないように天井部を有していることが好ましい。 The backrest 3 is made of a band-shaped canvas, and as shown in FIG. 1, the back rods 9 of the left and right back seat frames 12 are covered with tubular bag portions 4 at both ends to support them. The bag portion 4 is sewn by folding back both ends of the strip-shaped canvas, and preferably has a ceiling portion so as not to penetrate the back rod portion 9.

ここで、椅子の使用中に袋部4が背桿部9から抜け外れると、背凭れ3を突然失うこととなって危険なので、背桿部9に対して袋部4を固定する必要がある。袋部4の固定は、ビス止めやリベット止めなどの通常の手法によっても良いが、本実施形態の場合には、図7に示すように、帯や紐、樹脂バンドあるいはテープなどの紐状物(以下、ストラップ5と呼ぶ)を袋部4の内部に備え、このストラップ5の端を背桿部9に固定するようにして袋部4の抜け防止が図られている。このストラップ5は、例えば、背凭れ3の袋部4を縫製する際に、袋部4の内側に一緒に縫い込むことが好ましい。つまり、帯状部材の端を折り返して袋部4を縫製する際の縫合箇所にストラップ5を縫い付けるようにしている。勿論、ストラップ5の帯状部材の背凭れ3への取付け位置は、前述の縫合箇所に限られないが、着座状態の際(凭れない状態)、さらには着座者が凭れた際に張り詰める背凭れ3の袋部4が背桿部9の外側の周面部分と接する部分よりも内側の領域であることが好ましい。また、ストラップ5は、袋部4を縫製する際に一緒に縫い込むことには限られず、予め帆布の適宜箇所に縫製しておいても良いし、接着や溶着などの手法で取付ても良い。ストラップは、着座状態の際(凭れない状態)、さらには着座者が凭れた際に張り詰める前記背凭れの前記袋部が前記背桿部の外側の周面部分と接する部分よりも内側の領域で前記背凭れに取付られていることが好ましい。 Here, if the bag portion 4 comes off from the back rod portion 9 while the chair is in use, the backrest 3 is suddenly lost, which is dangerous. Therefore, it is necessary to fix the bag portion 4 to the back rod portion 9. .. The bag portion 4 may be fixed by a usual method such as screwing or riveting, but in the case of the present embodiment, as shown in FIG. 7, a string-like object such as a band, a string, a resin band, or a tape is used. (Hereinafter referred to as a strap 5) is provided inside the bag portion 4, and the end of the strap 5 is fixed to the back rod portion 9 to prevent the bag portion 4 from coming off. For example, when sewing the bag portion 4 of the backrest 3, it is preferable that the strap 5 is sewn together with the inside of the bag portion 4. That is, the strap 5 is sewn to the sewn portion when the end of the band-shaped member is folded back and the bag portion 4 is sewn. Of course, the attachment position of the band-shaped member of the strap 5 to the backrest 3 is not limited to the above-mentioned sutured portion, but the backrest is tense when the seated person is seated (not leaning) and when the seated person is leaning. It is preferable that the bag portion 4 of 3 is an inner region of the portion in contact with the outer peripheral surface portion of the back rod portion 9. Further, the strap 5 is not limited to being sewn together when sewing the bag portion 4, and may be sewn at an appropriate position on the canvas in advance, or may be attached by a method such as adhesion or welding. .. The strap is an area inside the portion where the bag portion of the backrest, which is tense when the seated person is seated (not leaning), is in contact with the outer peripheral surface portion of the back rod portion. It is preferable that the strap is attached to the backrest.

ストラップ5の端にはビス止めあるいはクリップ止めなどのための手段例えば孔8が開けられており、この孔8と背桿部9の孔7とを貫通するビス、クリップあるいはリベットなどの締結手段を用いて固定することができる。本実施形態の場合には、締結手段としては樹脂ブッシュ8が使用されている。樹脂ブッシュ8は、楔状の頭に十字のスリットが入れられて、径方向に弾性変形する頭部を有するものであり、頭部の下の首部分の返りで圧入後は抜け難くなるものである。頭部を押して先端を押し込むだけで固定が完了するので作業が簡単に済むが、特にこれに特に限られず、ビスやリベットなどでも良い。尚、ストラップ5が紐状の場合には、自由端側がループ状に結束されて、樹脂ブッシュ8などを通する孔として代用される。 A hole 8 is formed at the end of the strap 5 for screwing or clipping, and a fastening means such as a screw, a clip or a rivet that penetrates the hole 8 and the hole 7 of the back rod portion 9 is provided. Can be fixed using. In the case of this embodiment, the resin bush 8 is used as the fastening means. The resin bush 8 has a head that is elastically deformed in the radial direction by having a cross slit in the wedge-shaped head, and is difficult to come off after press-fitting due to the return of the neck portion under the head. .. Fixing is completed simply by pushing the head and the tip, so the work is easy, but the work is not particularly limited to this, and screws or rivets may be used. When the strap 5 has a string shape, the free end side is bound in a loop shape and is used as a hole for passing the resin bush 8 or the like.

他方、背桿部9の孔7は、少なくとも背桿部9の袋部4を被せたときに隠される部分に開けられていることが外観に現れないようにする上で好ましい。さらに好ましくは、背桿部9の背面側に開けられていることがストラップ5に力がかからないようにする上で好ましい。 On the other hand, it is preferable that the hole 7 of the back rod portion 9 is opened at least in a portion hidden when the bag portion 4 of the back rod portion 9 is put on the back rod portion 9 so as not to appear in the appearance. More preferably, it is preferable that the strap 5 is opened on the back side of the back rod portion 9 in order to prevent the strap 5 from being subjected to force.

また、ストラップ5は、背桿部9の前面側を通らずに背面側に回り込むようにして、背桿部9の背面側に固定されることが好ましい。つまり、ストラップ5が背桿部9に巻掛けられること無く背桿部9の背面側に固定される。ここで、ストラップ5はこの場合、背凭れが後方へ撓む際に、ストラップが緩む方向なので力がかからないので好ましい。つまり、着座者が背凭れ3に凭れることにより背凭れ3が後方へ撓む結果として袋部4が内向きに回転したとき、ストラップ5は弛み、袋部4は回転して背桿部9への締結箇所へ力がかからないように作用する。したがって、背凭れ3に体重がかかって後方へ膨らむような撓みが生じる結果、袋部4に回転が生じても、袋部4と背桿部9とは直接連結されておらず、ストラップ5を介して連結されているだけなので、袋部4は自由回転する。このため、袋部4が引き裂かれるような力も作用しないし、皺が発生することなどもない。つまり、ストラップ5が撓むだけで、袋部4に破れが発生することもないし、外観は保たれる。尚、ストラップ5の長さは特に限られるものではないが、弛んで袋部4の外に垂れ下がることのない長さとすることである。着座状態の際(凭れない状態)、さらには着座者が凭れた際の背凭れは、両端の袋部4の外側の周面部分(ほぼ半周面)が背桿部9の外側の周面部分(ほぼ半周面)と接して張り詰めることから、内側のストラップ5そのものに張力が発生することは無い。このことから、ストラップ5の締結部即ち帯状部材・帆布への縫製箇所並びに樹脂ブッシュ8で止め付けられる部分に直接負担がかからない。 Further, it is preferable that the strap 5 is fixed to the back side of the back rod portion 9 so as to wrap around to the back side without passing through the front side of the back rod portion 9. That is, the strap 5 is fixed to the back side of the back rod portion 9 without being wrapped around the back rod portion 9. Here, in this case, the strap 5 is preferable because when the backrest bends backward, no force is applied because the strap is in the loosening direction. That is, when the bag portion 4 rotates inward as a result of the seater leaning against the backrest 3 and the backrest 3 bends backward, the strap 5 loosens and the bag portion 4 rotates and the back rod portion 9 It acts so that no force is applied to the fastening point to. Therefore, even if the bag portion 4 is rotated as a result of the weight being applied to the backrest 3 and the backrest portion 3 being bent backward, the bag portion 4 and the back rod portion 9 are not directly connected to each other, and the strap 5 is attached. Since they are only connected via each other, the bag portion 4 rotates freely. Therefore, the force that tears the bag portion 4 does not act, and wrinkles do not occur. That is, only the strap 5 is bent, the bag portion 4 is not torn, and the appearance is maintained. The length of the strap 5 is not particularly limited, but the length is such that the strap 5 does not loosen and hang down from the bag portion 4. When the seated state (not leaning), and when the seated person leans back, the outer peripheral surface portion (almost half peripheral surface) of the bag portions 4 at both ends is the outer peripheral surface portion of the back rod portion 9. Since it is in contact with (almost half of the peripheral surface) and is tense, tension is not generated on the inner strap 5 itself. Therefore, the fastening portion of the strap 5, that is, the portion sewn to the strip-shaped member / canvas and the portion to be fastened by the resin bush 8 are not directly burdened.

ここで、フレーム1の開きの制御・規制は、フレーム間に跨がる張地で行われる。本実施形態の場合、例えば背凭れ3の張りで行われる。つまり、着座状態におけるフレームの開き締めを帆布が担う際に、座が突っ張るのでは無く、背が突っ張る状態となる。譬え力がかかったとしても樹脂ブッシュ8で止め付けられるストラップ5に負荷がかかるだけであり、背凭れ3の本体に影響はない。 Here, the control / regulation of the opening of the frame 1 is performed in the upholstery straddling the frames. In the case of the present embodiment, for example, the tension of the backrest 3 is used. That is, when the canvas is responsible for opening and tightening the frame in the seated state, the seat is not stretched, but the back is stretched. Even if a reminiscent force is applied, only the load is applied to the strap 5 fixed by the resin bush 8, and the main body of the backrest 3 is not affected.

椅子の使用時には、背凭れ3の帆布は、袋部4の外側が背桿部9で引っ張られて全体的に張ることとなる。このとき、帆布と背桿部9とは、帆布が接する背桿部9の全域において引っ張られるが、ストラップ5と該ストラップ5を締結する樹脂ブッシュ8には力がかかっていない。あくまで、袋部4の上方向の移動を阻止する、抜け止めのための固定として機能することとなる。 When the chair is used, the canvas of the backrest 3 is stretched as a whole by pulling the outside of the bag portion 4 by the back rod portion 9. At this time, the canvas and the back rod portion 9 are pulled over the entire area of the back rod portion 9 in contact with the canvas, but no force is applied to the strap 5 and the resin bush 8 that fastens the strap 5. To the last, it functions as a fixing for preventing the bag portion 4 from moving upward.

また、本実施形態の折り畳み椅子は、折り畳んだときに自然に脚が開かないように抵抗を発生させて堪えさせるストッパ機構20を備える。ストッパ機構20は、縦置きでスタッキングさせるあるいは閉じた状態で自立させることを可能とするための抵抗機構であって、簡易的な開き止め機構である。このストッパ機構20は、連結箇所の連結部材を兼ねるものであって、一対の脚フレーム13を自由に回転可能に連結する一方で、脚が開かないように抵抗を発生させるものである。 Further, the folding chair of the present embodiment includes a stopper mechanism 20 that generates resistance so that the legs do not open naturally when folded. The stopper mechanism 20 is a resistance mechanism for enabling stacking in a vertical position or self-standing in a closed state, and is a simple opening prevention mechanism. The stopper mechanism 20 also serves as a connecting member at the connecting portion, and connects the pair of leg frames 13 so as to be freely rotatable, while generating resistance so that the legs do not open.

このストッパ機構20としては、例えば図4〜図6に示すように、一方の脚例えば右脚フレーム13Rにフィットする第1の部材21と、他方の脚例えば左脚フレーム13Lにフィットする第2の部材22と、これら第1の部材21と第2の部材22との間に配置されて相手側部材の内周面24の溝25に嵌合して抵抗を発生させて回転を止める第3の部材23及び第3の部材23を常時径方向外側に広げるように付勢する弾性部材例えば捻りばね(図示省略)とで構成され、第1の部材21と第2の部材22とのいずれか一方例えば第2の部材22に第3の部材23を供回りさせると共に、他方の部材例えば第1の部材の内周面に第3の部材の外周面を弾性部材で押しつけて摩擦抵抗を発生させるものの使用が好ましい。 As the stopper mechanism 20, for example, as shown in FIGS. 4 to 6, a first member 21 that fits one leg, for example, the right leg frame 13R, and a second member 21 that fits the other leg, for example, the left leg frame 13L. A third member, which is arranged between the member 22 and the first member 21 and the second member 22, fits into the groove 25 of the inner peripheral surface 24 of the mating member to generate resistance and stop the rotation. It is composed of an elastic member, for example, a torsion spring (not shown) that constantly urges the member 23 and the third member 23 to expand outward in the radial direction, and is one of the first member 21 and the second member 22. For example, the third member 23 is rotated around the second member 22, and the outer peripheral surface of the third member is pressed against the inner peripheral surface of the other member, for example, the first member by an elastic member to generate frictional resistance. Preferable to use.

さらに、本実施形態のストッパ機構における第1の部材21は、内部空間に第3の部材23を回転可能に収容すると共に第3の部材23の径方向凸部33と嵌合する複数の溝25を伴う内周面24を有する。他方、第2の部材22には、第1の部材21の内部空間に入り込む中心軸部29と第1の部材21の内周面24と部分的に摺接するガイド弧28と、第3の部材23の軸方向突起34と係合する凹部30とを有する。そして、第1の部材21と第2の部材22との間に相対回転が起こると、軸方向突起34と凹部30との係合により第2の部材22と回転方向に連動する第3の部材23が相対回転させられて第1の部材21の内周面の溝25を乗り越えて回転して、次の溝25に嵌まり込んで固定される。つまり、回転と回転に対する抵抗を付加する構造となっている。 Further, the first member 21 in the stopper mechanism of the present embodiment rotatably accommodates the third member 23 in the internal space and has a plurality of grooves 25 that fit with the radial convex portion 33 of the third member 23. It has an inner peripheral surface 24 with. On the other hand, the second member 22 includes a guide arc 28 that partially slides with the central shaft portion 29 that enters the internal space of the first member 21 and the inner peripheral surface 24 of the first member 21, and a third member. It has a recess 30 that engages with the axial protrusion 34 of the 23. Then, when relative rotation occurs between the first member 21 and the second member 22, a third member that is interlocked with the second member 22 in the rotational direction by engaging the axial protrusion 34 and the recess 30. The 23 is relatively rotated to rotate over the groove 25 on the inner peripheral surface of the first member 21, and is fitted into the next groove 25 to be fixed. That is, it has a structure that adds rotation and resistance to rotation.

第3の部材23を常時径方向外側に広げるように付勢する捻りばねは、図示していないが、第3の部材23の内側に配置され、両端が径方向凸部33の内側の切り欠き部分35に当てられている。尚、本実施形態では、第3の部材23を常時径方向外側に広げる弾性部材として捻りコイルばねを用いた例を挙げて説明したが、これに特に限られるものでは無く、エラストマー材などの他のばね弾性材や第3の部材23そのものばね弾性構造によっても良い。また、第1の部材21の右脚フレーム13Rと接する外側の面と第2の部材22の左脚フレーム13Lと接する外側の面には、例えば図6及び図5に示すように、径方向に貫通する円弧状の溝27,32が形成され、右脚フレーム13Rと左脚フレーム13Lとにそれぞれ密着するように設けられている。これら溝27,32は、ストッパ機構20を組み立てたときに、互いに交差する方向に軸がある溝として形成されている。 A torsion spring that urges the third member 23 to always spread outward in the radial direction is not shown, but is arranged inside the third member 23, and both ends are notches inside the radial convex portion 33. It is applied to the part 35. In the present embodiment, an example in which a torsion coil spring is used as an elastic member that constantly expands the third member 23 outward in the radial direction has been described, but the present invention is not particularly limited to this, and other materials such as an elastomer material are used. The spring elastic material of the above or the spring elastic structure of the third member 23 itself may be used. Further, as shown in FIGS. 6 and 5, for example, the outer surface of the first member 21 in contact with the right leg frame 13R and the outer surface of the second member 22 in contact with the left leg frame 13L are in the radial direction. Arc-shaped grooves 27 and 32 penetrating are formed, and are provided so as to be in close contact with the right leg frame 13R and the left leg frame 13L, respectively. These grooves 27 and 32 are formed as grooves having axes in directions intersecting each other when the stopper mechanism 20 is assembled.

上述のストッパ機構20は、図1に示すように、右脚フレーム13Rと左脚フレーム13Lとの交差する箇所(連結箇所)のフレームの間に介在され、脚フレーム13の孔40を貫通する連結ピン例えばボルト(あるいはリベットなど)36によって相互に連結されることによって組み立てられる。ボルト36は例えばワッシャ38,39を介在させて袋ナット37で締め付けられている。勿論、リベットなどで回転可能に締結しても良い。ここで、第1の部材21、第3の部材(弾性部材を含む)及び第2の部材22は、予めその順に配置して仮に組み立てておくことが作業を簡易にする上で好ましい。尚、脚フレーム13の孔40を貫通する連結手段であるボルト36は、貫通孔26及び31を貫通して、第1の部材21と第2の部材22とを締結する。 As shown in FIG. 1, the stopper mechanism 20 described above is interposed between the frames at the intersections (connection points) of the right leg frame 13R and the left leg frame 13L, and is connected through the hole 40 of the leg frame 13. Assembled by being interconnected by pins such as bolts (or rivets) 36. The bolt 36 is tightened with a bag nut 37, for example, with washers 38 and 39 interposed therebetween. Of course, it may be rotatably fastened with rivets or the like. Here, it is preferable that the first member 21, the third member (including the elastic member), and the second member 22 are arranged in this order in advance and temporarily assembled in order to simplify the work. The bolt 36, which is a connecting means for penetrating the hole 40 of the leg frame 13, penetrates the through holes 26 and 31 and fastens the first member 21 and the second member 22.

このストッパ機構20の脚フレーム間への介在、即ち右脚フレーム13Rと左脚フレーム13Lとの間への介在により、フレーム自重では脚フレーム13は回転せず、開かない。他方、折り畳む際にストッパ機構20が第3の部材23の径方向凸部23が第1の部材21の内周面の溝25を乗り越える際にクリック感を与えるので、折り畳んだということ、あるいは開いたということを使用者はしっかりと実感できる。本実施形態では交差する脚13R,13Lの前後にそれぞれストッパ機構20を設けているが、これに特に限られるものではなく、少なくとも一方の連結箇所に設ければ良い。これによって、オフィスでの使用で椅子を別の部署などに移動させるときなどの、一時的な折り畳み時に自立が崩れないようにすることができる。 Due to the intervention of the stopper mechanism 20 between the leg frames, that is, the intervention between the right leg frame 13R and the left leg frame 13L, the leg frame 13 does not rotate and does not open under the frame's own weight. On the other hand, when the stopper mechanism 20 is folded, the radial convex portion 23 of the third member 23 gives a click feeling when it gets over the groove 25 on the inner peripheral surface of the first member 21, so that it is folded or opened. The user can firmly realize that it was. In the present embodiment, the stopper mechanisms 20 are provided before and after the intersecting legs 13R and 13L, respectively, but the present invention is not particularly limited to this, and the stopper mechanisms 20 may be provided at at least one connecting portion. This makes it possible to prevent the chair from losing its independence during temporary folding, such as when the chair is moved to another department for use in the office.

また、脚13の接地部41には、滑り止め部品42が備えられている。 Further, the ground contact portion 41 of the leg 13 is provided with a non-slip component 42.

上述の構成の折り畳み椅子は、ストッパ機構20によって、折り畳み動作時に抵抗を加え、溝を乗り越えてから閉じるあるいは開くストッパとして機能するので、独りでに広がらないように耐える。つまり、脚を折り畳んだ時にも、脚の回転に対して摩擦抵抗が発生しているので、故意に脚を開かないように力をかけない限り、自然に開くようなことがない。しかも、折り畳み動作時にラッチ音・節度感が生じ、独りでに広がらない状態に入ったことを認識できる。依って、例えばオフィス内での使用時などで、椅子を他の部屋などに移動させるとなきどに、仮固定させるのに便利である。 The folding chair having the above-described configuration has a stopper mechanism 20 that applies resistance during the folding operation and functions as a stopper that closes or opens after overcoming the groove, so that it can withstand not spreading by itself. In other words, even when the legs are folded, frictional resistance is generated against the rotation of the legs, so unless force is applied so as not to intentionally open the legs, the legs will not open naturally. Moreover, it is possible to recognize that a latch sound and a sense of moderation are generated during the folding operation, and that the user has entered a state in which it does not spread by itself. Therefore, it is convenient to temporarily fix the chair when it is used in an office, for example, when the chair is moved to another room or the like.

なお、上述の形態は本発明の好適な形態の一例ではあるがこれに限定されるものではなく本発明の要旨を逸脱しない範囲において種々変形実施可能である。例えば、上述の実施形態では、左右に開閉するフレーム構造の例を挙げて主に説明したがこれに特に限られるものではなく、前後に開閉するフレーム構造であっても適用可能であることは言うまでもない。つまり、折り畳み方向は、左右方向のみならず、前後方向も含むものであり、通常の折り畳み椅子にも適用可能である。 The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be performed without departing from the gist of the present invention. For example, in the above-described embodiment, an example of a frame structure that opens and closes to the left and right has been mainly described, but the present invention is not particularly limited, and it goes without saying that a frame structure that opens and closes back and forth is also applicable. No. That is, the folding direction includes not only the left-right direction but also the front-back direction, and can be applied to a normal folding chair.

さらに、上述の実施形態の椅子は特定の用途への使用に限られるものではないが、オフィスでの使用にも十分に耐え得る強度・耐久性を有していることから、屋外での使用に限られず、例えばオフィスなどで折り畳み椅子としての使用にも適していることはいうまでもない。 Further, although the chair of the above-described embodiment is not limited to use for a specific purpose, it has sufficient strength and durability to withstand use in an office, so that it can be used outdoors. Needless to say, it is not limited, and is also suitable for use as a folding chair in an office, for example.

また、図示していないが、左右のフレームのうちの一方のフレームに締結用のバンドを備え、フレームを折り畳んだ後に両フレームにバンドを掛け渡して止めることで本格的に固定することも可能である。例えば、肘桿部や座桿部にバンドを縫い付けておき、不使用時にはボタン止めなどで固定しておき、使用するときにバンドをボタンフックから外して他方のパイプフレームの肘桿部あるいは座桿部に巻き付けてからボタン止めなどで固定するようにしても良い。 In addition, although not shown, it is also possible to equip one of the left and right frames with a band for fastening, and after folding the frame, hang the band on both frames and stop it in earnest. is there. For example, a band is sewn on the elbow rod or seat rod, fixed with a button stopper when not in use, and the band is removed from the button hook when in use, and the elbow rod or seat of the other pipe frame. It may be wrapped around the rod and then fixed with a button stopper or the like.

1フレーム
2 座(帆布)
3 背凭れ(帆布)
4 袋部
5 ストラップ
6 ストラップの孔
7 背桿部の孔
8 樹脂ブッシュ(締結手段)
9 背桿部
13 脚フレーム
13R 右脚フレーム
13L 左脚フレーム
20 ストッパ機構
21 第1の部材
22 第2の部材
23 第3の部材
24 第1の部材の内周面(相手側部材の内周面)
25 第1の部材の内周面の溝
28 第2の部材のガイド弧
29 第2の部材の中心軸部
30 第2の部材の軸方向凹部
33 第3の部材の径方向凸部
34 第3の部材の軸方向突起
37 袋ナット(左右の脚フレームの交差箇所を貫通するボルトと組みになって締結)
41 接地部
1 frame 2 seats (canvas)
3 Backrest (canvas)
4 Bag part 5 Strap 6 Strap hole 7 Back rod hole 8 Resin bush (fastening means)
9 Back rod 13 Leg frame 13R Right leg frame 13L Left leg frame 20 Stopper mechanism 21 First member 22 Second member 23 Third member 24 Inner peripheral surface of the first member (inner peripheral surface of the mating member) )
25 Groove on the inner peripheral surface of the first member 28 Guide arc of the second member 29 Central shaft portion of the second member 30 Axial concave portion of the second member 33 Radial convex portion of the third member 34 Third Axial protrusion 37 bag nut (fastened in combination with a bolt that penetrates the intersection of the left and right leg frames)
41 Grounding part

Claims (5)

脚が交差する一対のフレーム間に帯状部材を張って座並びに背凭れを構成する一方、フレーム間の交差角度を変更することにより折り畳み可能な椅子において、
前記脚の交差箇所に、交差する脚を回転可能に連結する一方で、脚が開かないように抵抗を発生させるストッパ機構を組み込んだことを特徴とする折り畳み椅子。
In a chair that is foldable by changing the crossing angle between the frames, while forming a seat and a backrest by stretching a band-shaped member between a pair of frames where the legs intersect.
A folding chair characterized in that a stopper mechanism is incorporated at the intersection of the legs to rotatably connect the intersecting legs while generating resistance so that the legs do not open.
前記ストッパ機構は、一方の脚にフィットする第1の部材と、他方の脚にフィットする第2の部材と、前記第1の部材と前記第2の部材との間に配置されて相手側部材の内周面の溝に嵌合して抵抗を発生させて回転を止める第3の部材及び前記第3の部材を常時径方向外側に向けて付勢する弾性部材とで構成され、前記第1の部材と前記第2の部材とのいずれか一方に前記第3の部材を供回りさせると共に、他方の部材の内周面に前記第3の部材の外周面を前記弾性部材で押しつけて摩擦抵抗を発生させることを特徴とする請求項1記載の折り畳み椅子。 The stopper mechanism is arranged between a first member that fits one leg, a second member that fits the other leg, and the first member and the second member, and is a mating member. It is composed of a third member that fits into the groove on the inner peripheral surface of the chair to generate resistance and stop the rotation, and an elastic member that constantly urges the third member outward in the radial direction. The third member is rotated around one of the member and the second member, and the outer peripheral surface of the third member is pressed against the inner peripheral surface of the other member by the elastic member to resist friction. The folding chair according to claim 1, wherein the folding chair is characterized in that. 前記第1の部材は内部空間に前記第3の部材を回転可能に収容すると共に前記第3の部材の径方向凸部と嵌合する複数の前記溝を伴う内周面を有し、他方、前記第2の部材には、前記第1の部材の内周面の一部と摺接するガイド弧と、前記第3の部材の軸方向突起と係合する凹部とを有し、前記第1の部材と前記第2の部材との間に相対回転が起こると、前記軸方向突起と前記凹部との係合により前記第2の部材と回転方向に連動する前記第3の部材が回転させられて前記第1の部材の内周面の前記溝を乗り越えて回転して、次の溝に嵌まり込んで固定されることにより、回転と回転に対する抵抗を付加する構造を構成していることを特徴とする請求項2記載の折り畳み椅子。 The first member has an inner peripheral surface with a plurality of grooves that rotatably accommodates the third member in an internal space and fits with a radial convex portion of the third member, while the other. The second member has a guide arc that is in sliding contact with a part of the inner peripheral surface of the first member, and a recess that engages with an axial protrusion of the third member. When a relative rotation occurs between the member and the second member, the third member that is interlocked with the second member in the rotation direction is rotated by the engagement between the axial protrusion and the recess. It is characterized in that it has a structure that adds resistance to rotation and rotation by rotating over the groove on the inner peripheral surface of the first member and fitting into the next groove to be fixed. The folding chair according to claim 2. 前記脚は少なくとも前記交差箇所より下の部分では左右方向の外に向けて広がり、左右の脚の接地部分の間の間隔を開けたままの状態で折り畳み状態となり、自立可能であることを特徴とする請求項1から3のいずれか1つに記載の折り畳み椅子。 The legs are characterized in that they spread outward in the left-right direction at least in the portion below the intersection, and are in a folded state with a gap between the ground contact portions of the left and right legs, and can stand on their own. The folding chair according to any one of claims 1 to 3. 左右の脚または前後の脚の前記接地部は、一方が他方に比べて広く他方が一方に比べて狭く、折り畳んで自立する際に、開いた左右の前記脚の間に他の椅子の一方の脚を差し込んで水平スタッキングを可能とすること特徴とする請求項4記載の椅子。 The ground contact portion of the left and right legs or the front and rear legs is wider than the other and narrower than the other, and when folded and self-supporting, one of the other chairs is opened between the left and right legs. The chair according to claim 4, wherein the legs are inserted to enable horizontal stacking.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110810U (en) * 1977-02-14 1978-09-05
JPH0326208A (en) * 1989-06-23 1991-02-04 Irie Bussan Kk Gate ball implement carrier with folding chair
JP3039114U (en) * 1996-12-27 1997-07-11 有限会社鈴木金属工業所 Unfolding stopper for folding leg rod
JP3086144U (en) * 2001-11-20 2002-06-07 日本治具株式会社 Folding chair that doubles as a carrier
JP3088395U (en) * 2002-03-06 2002-09-06 及華實業股▲分▼有限公司 Folding chair

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110810U (en) * 1977-02-14 1978-09-05
JPH0326208A (en) * 1989-06-23 1991-02-04 Irie Bussan Kk Gate ball implement carrier with folding chair
JP3039114U (en) * 1996-12-27 1997-07-11 有限会社鈴木金属工業所 Unfolding stopper for folding leg rod
JP3086144U (en) * 2001-11-20 2002-06-07 日本治具株式会社 Folding chair that doubles as a carrier
JP3088395U (en) * 2002-03-06 2002-09-06 及華實業股▲分▼有限公司 Folding chair

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