JP2004049737A - Chair - Google Patents

Chair Download PDF

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Publication number
JP2004049737A
JP2004049737A JP2002214225A JP2002214225A JP2004049737A JP 2004049737 A JP2004049737 A JP 2004049737A JP 2002214225 A JP2002214225 A JP 2002214225A JP 2002214225 A JP2002214225 A JP 2002214225A JP 2004049737 A JP2004049737 A JP 2004049737A
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JP
Japan
Prior art keywords
backrest
chair
seat
elbow frame
armrest
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2002214225A
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Japanese (ja)
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JP4181349B2 (en
Inventor
Hiroshi Masunaga
益永 浩
Ryo Igarashi
五十嵐 僚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okamura Corp
Original Assignee
Okamura Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2002214225A priority Critical patent/JP4181349B2/en
Publication of JP2004049737A publication Critical patent/JP2004049737A/en
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Publication of JP4181349B2 publication Critical patent/JP4181349B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair with a firm structure by which an armrest is properly reclined backward with a reclining movement, and also burden is sufficiently relieved even when a large load is added to the front end of the armrest. <P>SOLUTION: The respective lower ends of arm frames 12 which are extended to the upper part of a seat 10 at the sides of the seat 10, and include the armrests 11 on the respective upper ends are fixed to each intermediate part in a front and rear direction of each horizontal part 8a in the lower parts of a backrest support rods 8. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、リクライニング機能を有するとともに、肘掛けを備えた椅子に関する。
【0002】
【従来の技術】
従来のこの種の椅子としては、例えば特開平10−117883号公報に示されているように、肘掛けを支持する肘フレームの下部を、座または支基の下面に螺締する型式のものが大部分である。
これに対して、特表平8−507935号公報には、リクライニング傾動する背凭れまたは背凭れ支持杆の起立部の中間から前方に肘掛けを突設させた椅子が示されている。
【0003】
【発明が解決しようとする課題】
上述の前者は、椅子をリクライニング傾動させ、着座者の背の位置が後退すると、肘掛けの位置が相対的に前になりすぎて具合が悪い。
【0004】
後者では、リクライニング傾動に伴って肘掛けも後方に傾動するので、上述の欠点が解決されるが、この肘掛けは、その後端が背凭れまたは背凭れ支持杆に片持ち梁式に支持されているので、肘掛けの前端部に大きな荷重が加わった場合に、その基端部が折損し易く、強度的に弱いという問題がある。
【0005】
本発明は、従来の技術が有する上記のような問題点に鑑み、リクライニング傾動に伴って、肘掛けも適度に後方に傾動するとともに、肘掛けの前端部に大きな荷重が加わった場合でも、充分これを負担できる強固な構造の椅子を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明によると、上記課題は、次のようにして解決される。
(1) 座の下方に配設されて、座を支持する支基の両側部に、側面視ほぼ略L字状の背凭れ支持杆の下部の水平部の前端が左右方向を向く軸をもって回動可能に軸着され、前記水平部の後端から起立する背凭れ支持杆の起立部に背凭れが取り付けられた椅子において、前記背凭れ支持杆の下部の水平部の前後方向の中間部に、座の側方において、座の上方に延出し、かつ上端に肘掛けが設けられた肘フレームの下端部を固着する。
【0007】
(2) 上記(1)項において、背凭れ支持杆の水平部の前後方向の中間部に、外側方を向く肘フレーム取付部を設け、この肘フレーム取付部の外側端面と肘フレームの下端の内側端面とを当接させて、両者を左右方向を向く連結ボルトにより螺着する。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を、添付図面を参照して説明する。
図1〜図4は、本発明の一実施形態を備える椅子を示す。
【0009】
図1及び図2に示すように、この椅子は、先端部にキャスタ(1)が設けられた放射状をなす5本の脚(2)を有する脚体(3)を備えている。脚体(3)の中央には、ガススプリング(図示略)を備える伸縮式の脚柱(4)が立設されており、脚柱(4)の上端には、支基(5)が固着されている。
【0010】
支基(5)の前後方向(図2の左が前方、右が後方である)の中間部には、左右方向(図1の左右方向)を向く六角柱状の軸(6)が、その中心軸線回りに回動可能として貫通されている。支基(5)の両側より左右に突出する軸(6)の両端部には、背凭れ(7)を支持する側面視ほぼL字状の左右1対の背凭れ支持杆(8)(8)の前端部が固着されており、背凭れ(7)及び背凭れ支持杆(8)(8)は、軸(6)と一体になって、軸(6)を中心に後下方に傾動し得るようになっている。この傾動は、図示してないリクライニング制御装置により制御される。背凭れ支持杆(8)は、水平部(8a)と、その後端から起立する起立部(8b)とからなっている。
【0011】
背凭れ支持杆(8)の上端には、ヘッドレスト(9)が設けられ、支基(5)の上方には、座(10)が、背凭れ支持杆(8)と連動して後下方に傾動するように設けられている。
【0012】
座(10)の両側上方に位置する肘掛け(11)は、肘フレーム(12)により支持されている。
図2及び図3に示すように、背凭れ支持杆(8)の水平部(8a)の中間部、すなわち軸(6)への固着端と起立部(8b)との連設部との中間位置には、外側方に向かって水平に延びる肘フレーム取付部(13)が一体に形成されている。
【0013】
図3及び図4に示すように、肘フレーム取付部(13)の先端は、前部が幅広で後部が幅狭の角がとれた前後方向に長い垂直断面形状をしており、その先端面の前部には、上下方向に連続する平面視山形の凸部(14)が、また先端面の後部には、左右方向を向く円形の係合孔(15)が、それぞれ設けられている。
また、凸部(14)の稜線の中央には、左右方向を向くねじ孔(16)が穿設されている。
【0014】
他方、肘フレーム(12)の下部の左右方向内向きに曲がった基端部(12a)の内側端部は、上述の肘フレーム取付部(13)の垂直断面形状と同じ前後方向に長い断面形状をなし、その先端面における幅広の前部には、凸部(14)と補形をなす、上下方向に連続する平面視谷形またはV字形の凹部(17)が、また幅狭の後部には、係合孔(15)に嵌合するピン状の突部(18)が、それぞれ設けられている。
【0015】
また、凹部(17)の谷の線の中央には、左右方向外向きに延びるボルト挿通孔(19)が穿設されている。肘フレーム(12)の基端部の外端には、上向きの屈曲部の下部を貫いて外側に解放するように、細長い開口(20)が形成されている。
(21)は、肘フレーム(12)の外側からボルト孔(19)に挿入され、肘フレーム取付部(13)のねじ孔(16)に螺締される連結ボルトである。
【0016】
肘フレーム(12)の取付に当たっては、肘フレーム(12)の内側先端面から突出する突部(18)を、肘フレーム取付部(13)の先端面の係合孔(15)に差し入れつつ、肘フレーム(12)の凹部(17)を肘フレーム取付部(13)の凸部(14)に嵌合させる。すると、両者は完全に整合する。
この状態で、肘フレーム(12)の外側から連結ボルト(21)を挿入し、肘フレーム取付部(13)のねじ孔(16)に螺締するだけで取付は完了する。
なお、凸部(14)と凹部(17)の関係及び突部(18)と係合孔(15)の関係は、上述の場合と逆の配置であってもよく、凸部(14)の稜線の向きは、前後方向またはその他の方向としてもよい。
また、肘フレーム取付部(13)は、支基(5)または座(10)に一体的に取付けてもよい。
【0017】
【発明の効果】
請求項1記載の発明によれば、リクライニング傾動に伴って、肘掛けも後方に傾動するので、リクライニング時の着座感がよく、しかも、肘掛けの前端部に大きな荷重が加わっても、上下方向を向く肘フレームにより、充分これに耐えることができ、強固な構造を呈することができる。
また、肘掛けと背凭れの側部との間に空間を形成することができるので、背凭れの組付け時や背凭れカバーの着脱時等に肘掛けが妨げとなることがない。
【0018】
請求項2記載の発明によれば、肘掛けを支持する肘フレームを取り付ける連結ボルトを、椅子の側方の広い空間から差し込んで螺締することができるので、作業性がよく組立が容易である。
【図面の簡単な説明】
【図1】本発明の一実施形態を備える椅子の正面図である。
【図2】同じく、側面図である。
【図3】同じく、椅子の肘フレームの取付部を、斜め下方から見上げた部分分解斜視図である。
【図4】同じく、肘フレームの取付部の部分分解平面図である。
【符号の説明】
(1)キャスタ
(2)脚杆
(3)脚体
(4)脚柱
(5)支基
(6)軸
(7)背凭れ
(8)背凭れ支持杆
(8a)水平部
(8b)起立部
(9)ヘッドレスト
(10)座
(11)肘掛け
(12)肘フレーム
(12a)基端部
(13)肘フレーム取付部
(14)凸部
(15)係合孔
(16)ねじ孔
(17)凹部
(18)突部
(19)挿通孔
(20)開口部
(21)連結ボルト
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a chair having a reclining function and having an armrest.
[0002]
[Prior art]
As a conventional chair of this type, for example, as shown in Japanese Patent Application Laid-Open No. Hei 10-117883, a type in which a lower portion of an elbow frame supporting an armrest is screwed to a lower surface of a seat or a support base is generally used. Part.
On the other hand, Japanese Patent Publication No. Hei 8-507935 discloses a chair in which an armrest protrudes forward from a middle portion of a reclining tilting backrest or an upright portion of a backrest supporting rod.
[0003]
[Problems to be solved by the invention]
In the above-described former, when the chair is reclined and tilted, and the back of the seated person recedes, the position of the armrest is relatively too forward, which is uncomfortable.
[0004]
In the latter, the above-mentioned disadvantage is solved because the armrest also tilts backward with the reclining tilt, but since the rear end of the armrest is supported by the backrest or the backrest support rod in a cantilever manner. In addition, when a large load is applied to the front end of the armrest, there is a problem that the base end is easily broken and the strength is weak.
[0005]
The present invention has been made in view of the above-described problems of the related art, and in accordance with the reclining tilt, the armrest also appropriately tilts rearward, and even when a large load is applied to the front end of the armrest, this is sufficiently reduced. An object of the present invention is to provide a chair having a strong structure that can bear.
[0006]
[Means for Solving the Problems]
According to the present invention, the above-mentioned problem is solved as follows.
(1) The front end of the horizontal portion of the lower part of the backrest supporting rod, which is substantially L-shaped in side view, is turned around both sides of the support base provided below the seat and supporting the seat. In a chair in which a backrest is attached to an upright portion of a backrest support rod that is movably mounted on the shaft and rises from a rear end of the horizontal portion, the chair is provided at a middle portion in the front-rear direction of the horizontal portion below the backrest support rod. At the side of the seat, the lower end of the elbow frame extending above the seat and having an armrest at the upper end is fixed.
[0007]
(2) In the above item (1), an elbow frame attaching portion facing outward is provided at an intermediate portion of the horizontal portion of the backrest supporting rod in the front-rear direction, and an outer end face of the elbow frame attaching portion and a lower end of the elbow frame are provided. The inner end face is brought into contact with the inner end face, and the two are screwed together by connecting bolts oriented in the left-right direction.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 4 show a chair provided with an embodiment of the present invention.
[0009]
As shown in FIGS. 1 and 2, the chair has a leg (3) having five radial legs (2) provided with casters (1) at the tip. At the center of the leg (3), a telescopic pillar (4) provided with a gas spring (not shown) is erected, and a support (5) is fixed to the upper end of the pillar (4). Have been.
[0010]
A hexagonal column-shaped shaft (6) that faces in the left-right direction (left-right direction in FIG. 1) is located at the center of the middle part of the support base (5) in the front-rear direction (left in FIG. 2 is forward and right in the back). It is penetrated so as to be rotatable around the axis. At both ends of a shaft (6) projecting left and right from both sides of the support base (5), a pair of right and left backrest supporting rods (8) (8), which are substantially L-shaped in side view and support the backrest (7). ) Is fixed at the front end, and the backrest (7) and the backrest supporting rods (8), (8) are integrated with the shaft (6) and tilt rearward and downward about the shaft (6). I am getting it. This tilting is controlled by a reclining control device (not shown). The backrest support rod (8) includes a horizontal portion (8a) and an upright portion (8b) that stands upright from the rear end.
[0011]
A headrest (9) is provided at the upper end of the backrest support rod (8), and a seat (10) is provided above the support base (5) in a rearward and downward direction in conjunction with the backrest support rod (8). It is provided to tilt.
[0012]
An armrest (11) located above both sides of the seat (10) is supported by an elbow frame (12).
As shown in FIGS. 2 and 3, an intermediate portion of the horizontal portion (8a) of the backrest support rod (8), that is, an intermediate portion of the end portion fixed to the shaft (6) and the continuous portion of the upright portion (8b). An elbow frame mounting portion (13) extending horizontally outward is integrally formed at the position.
[0013]
As shown in FIGS. 3 and 4, the distal end of the elbow frame mounting portion (13) has a long front-rear vertical cross-sectional shape with a wide front portion and a narrow corner at the rear portion. In the front part, a mountain-shaped convex part (14) that is continuous in the vertical direction is provided, and in the rear part of the front end surface, a circular engaging hole (15) that faces in the left-right direction is provided.
In the center of the ridge line of the convex portion (14), a screw hole (16) is formed which is oriented in the left-right direction.
[0014]
On the other hand, the inner end of the base end (12a) bent inward in the left-right direction at the lower part of the elbow frame (12) has the same longitudinal cross-sectional shape as the vertical cross-sectional shape of the above-mentioned elbow frame mounting portion (13). In the wide front portion of the distal end surface, a valley-shaped or V-shaped concave portion (17) which is complementary to the convex portion (14) and which is continuous in the vertical direction in a plan view and a rear portion of the narrow width. Are provided with pin-shaped protrusions (18) that fit into the engagement holes (15).
[0015]
At the center of the valley line of the recess (17), a bolt insertion hole (19) extending outward in the left-right direction is formed. An elongated opening (20) is formed at the outer end of the base end of the elbow frame (12) so as to pass through the lower part of the upward bent portion and release outward.
(21) is a connection bolt inserted into the bolt hole (19) from the outside of the elbow frame (12) and screwed into the screw hole (16) of the elbow frame mounting portion (13).
[0016]
In mounting the elbow frame (12), a projection (18) projecting from the inner front end surface of the elbow frame (12) is inserted into an engagement hole (15) on the front end surface of the elbow frame mounting portion (13). The concave portion (17) of the elbow frame (12) is fitted to the convex portion (14) of the elbow frame mounting portion (13). Then, both match perfectly.
In this state, the connection is completed only by inserting the connecting bolt (21) from the outside of the elbow frame (12) and screwing it into the screw hole (16) of the elbow frame mounting portion (13).
Note that the relationship between the protrusion (14) and the recess (17) and the relationship between the protrusion (18) and the engagement hole (15) may be reversed from the above-described case. The direction of the ridge line may be the front-rear direction or another direction.
Further, the elbow frame attachment portion (13) may be integrally attached to the support base (5) or the seat (10).
[0017]
【The invention's effect】
According to the first aspect of the present invention, the armrest also tilts rearward with the reclining tilt, so that the seating feeling at the time of reclining is good, and even if a large load is applied to the front end of the armrest, the armrest faces in the vertical direction. The elbow frame can withstand this sufficiently and exhibit a strong structure.
In addition, since a space can be formed between the armrest and the side of the backrest, the armrest does not hinder when assembling the backrest or attaching / detaching the backrest cover.
[0018]
According to the second aspect of the present invention, the connecting bolt for attaching the elbow frame supporting the armrest can be inserted from a wide space on the side of the chair and screwed, so that workability is good and assembly is easy.
[Brief description of the drawings]
FIG. 1 is a front view of a chair provided with an embodiment of the present invention.
FIG. 2 is also a side view.
FIG. 3 is a partially exploded perspective view of the attachment portion of the elbow frame of the chair, as viewed obliquely from below.
FIG. 4 is a partially exploded plan view of a mounting portion of the elbow frame.
[Explanation of symbols]
(1) Casters (2) Legs (3) Legs (4) Legs (5) Support (6) Shaft (7) Backrest (8) Backrest support rod (8a) Horizontal part (8b) Standing part (9) Headrest (10) Seat (11) Armrest (12) Elbow frame (12a) Base end (13) Elbow frame mounting part (14) Convex part (15) Engagement hole (16) Screw hole (17) Recess (18) Projection (19) Insertion hole (20) Opening (21) Connecting bolt

Claims (2)

座の下方に配設されて、座を支持する支基の両側部に、側面視ほぼ略L字状の背凭れ支持杆の下部の水平部の前端が左右方向を向く軸をもって回動可能に軸着され、前記水平部の後端から起立する背凭れ支持杆の起立部に背凭れが取り付けられた椅子において、
前記背凭れ支持杆の下部の水平部の前後方向の中間部に、座の側方において、座の上方に延出し、かつ上端に肘掛けが設けられた肘フレームの下端部を固着したことを特徴とする椅子。
The front end of the horizontal portion of the lower part of the backrest supporting rod, which is substantially L-shaped when viewed from the side, is rotatable on both sides of the support base that is disposed below the seat and supports the seat. A chair having a backrest attached to an upright portion of a backrest support rod that is axially attached and rises from the rear end of the horizontal portion,
A lower end portion of an elbow frame that extends above the seat and is provided with an armrest at an upper end is fixed to a laterally intermediate portion of a horizontal portion of a lower portion of the backrest supporting rod, at a side of the seat. And chair.
背凭れ支持杆の水平部の前後方向の中間部に、外側方を向く肘フレーム取付部を設け、この肘フレーム取付部の外側端面と肘フレームの下端の内側端面とを当接させて、両者を左右方向を向く連結ボルトにより螺着した請求項1記載の椅子。At the middle part of the horizontal portion of the backrest support rod in the front-rear direction, an outwardly directed elbow frame mounting portion is provided, and the outer end surface of the elbow frame mounting portion and the inner end surface of the lower end of the elbow frame are brought into contact with each other. 2. The chair according to claim 1, wherein the chair is screwed with a connecting bolt facing in the left-right direction.
JP2002214225A 2002-07-23 2002-07-23 Chair Expired - Fee Related JP4181349B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009254879A (en) * 2009-08-07 2009-11-05 Okamura Corp Armrest frame mounting structure for chair
JP2009254880A (en) * 2009-08-07 2009-11-05 Okamura Corp Armrest frame mounting structure for chair

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009254879A (en) * 2009-08-07 2009-11-05 Okamura Corp Armrest frame mounting structure for chair
JP2009254880A (en) * 2009-08-07 2009-11-05 Okamura Corp Armrest frame mounting structure for chair

Also Published As

Publication number Publication date
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