JP4510596B2

JP4510596B2 - Chair

Info

Publication number: JP4510596B2
Application number: JP2004329694A
Authority: JP
Inventors: 英二川崎; 信人藤森; 彰清久; 僚五十嵐
Original assignee: Okamura Corp
Current assignee: Okamura Corp
Priority date: 2004-11-12
Filing date: 2004-11-12
Publication date: 2010-07-28
Anticipated expiration: 2024-11-12
Also published as: JP2006136569A

Description

本発明は、左右の脚フレームの上端を座より高くして肘掛け部とし、両肘掛け部の後部に背凭れを取り付けた椅子に関する。 The present invention relates to a chair in which the upper ends of left and right leg frames are made higher than a seat to form an armrest, and a backrest is attached to the rear part of both armrests.

従来、左右の脚フレームの後部に、背凭れの左右両側を、上下２本のボルトにより取り付けた椅子がある（例えば特許文献１参照）。
特開２００３−１３５２００号公報 Conventionally, there is a chair in which the left and right sides of the backrest are attached to the rear portions of the left and right leg frames with two upper and lower bolts (see, for example, Patent Document 1).
JP 2003-135200 A

上記特許文献１に記載されている従来の椅子は、背凭れを取り付ける部分が、脚フレームの肘掛け部後端から下方に向けて延設されているため、上下のボルトの間隔は狭くならざるを得ず、しかも、上部のボルトから上方では背凭れの支持部分がないため、背凭れの高さが大きくなると強度が保てなくなり、したがって、高い背凭れの使用が困難であるという問題がある。 In the conventional chair described in the above-mentioned Patent Document 1, since the portion to which the backrest is attached is extended downward from the rear end of the armrest portion of the leg frame, the distance between the upper and lower bolts must be narrow. In addition, since there is no support portion for the backrest above the upper bolt, the strength cannot be maintained when the height of the backrest is increased, and therefore there is a problem that it is difficult to use a high backrest.

高さの大きい背凭れを使用する場合は、通常、背凭れを座と一体に形成して、背凭れの支持強度を大とすることが多く、このような椅子では、座と背凭れが連続してしまうため、座と背凭れが分離した、多様なデザインを採用しにくいという問題がある。 When using a backrest with a large height, the backrest is usually formed integrally with the seat to increase the support strength of the backrest. In such a chair, the seat and backrest are continuous. Therefore, there is a problem that it is difficult to adopt various designs in which the seat and the back are separated.

本発明は、上記問題点に鑑みてなされたもので、背凭れの支持強度を大きくすることにより、座と背凭れを分離した構造のデザインとすることができ、かつ高さの大きい背凭れを使用可能にした椅子を提供することを目的としている。 The present invention has been made in view of the above problems, and by increasing the support strength of the backrest, it is possible to make a design with a structure in which the seat and the backrest are separated, and a backrest with a large height. It aims to provide a chair that can be used.

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)上部に肘掛け部を有する左右１対の脚フレームにおける前記肘掛け部の後端部に、背凭れを取り付けてなる椅子において、前記左右の肘掛け部の後端部に、背凭れの中間部の左右両側部を取り付けるとともに、座の下方において前記脚フレームの前部から後向きにほぼ水平に延出する、管材により形成された座支持杆の後端部の開口部内に、前記背凭れの下部から前方に向かって延出する連結片の前端に突設したほぼ水平をなす連結軸を、緊密に嵌合させて結合する。 According to the present invention, the above problem is solved as follows.
(1) In a chair in which a backrest is attached to the rear end portion of the left and right armrests in a pair of left and right leg frames having an armrest portion at the top, an intermediate portion of the backrest is attached to the rear end portions of the left and right armrest portions. The lower part of the backrest is installed in the opening of the rear end portion of the seat support rod formed by the pipe , which is attached to the left and right sides of the seat frame and extends substantially horizontally rearwardly from the front portion of the leg frame below the seat. A connecting shaft that is substantially horizontal and protrudes from the front end of the connecting piece that extends forward from the front is closely fitted and coupled.

(２)上記(１)項において、左右の脚フレームを、上下方向を向く前脚を有する側部フレームと、両側部フレームの前脚同士を連結する連結杆を備えるものとし、この連結杆に、座支持杆の前端を、後向きに固定する。 (2) In the above paragraph (1), the left and right leg frames are provided with side frames having front legs that face in the vertical direction and connecting rods that connect the front legs of both side frames. Fix the front edge of the support rod backward.

(３)上記(１)または(２)項において、座支持杆および連結片の連結軸を左右１対とし、それらの対向端部同士を互いに結合する。 (3) In the above item (1) or (2), the connecting shafts of the seat support rod and the connecting piece are paired on the left and right sides, and their opposite ends are coupled to each other.

(４)上記(１)〜(３)項のいずれかにおいて、座の後部を、座支持杆における連結片との結合部に載置して支持する。 ( 4 ) In any one of the above items (1) to ( 3 ), the rear portion of the seat is placed on and supported by the joint portion of the seat support rod with the connecting piece.

(５)上記(４)項において、座の後部と座支持杆と連結片の連結軸とを、ねじにより共締めして固定する。 ( 5 ) In the above item ( 4 ), the rear portion of the seat, the seat support rod, and the connecting shaft of the connecting piece are fixed together by screws.

(６)上記(１)〜(５)項のいずれかにおいて、脚フレームが上下方向を向く後脚を有するものにおいて、座支持杆の後部と後脚とを補強杆により連結する。 ( 6 ) In any one of the above items (1) to ( 5 ), in the case where the leg frame has a rear leg facing in the vertical direction, the rear part of the seat support bar and the rear leg are connected by a reinforcing bar.

(７)上記(１)〜(６)項のいずれかにおいて、背凭れのフレームとなる背シェルを合成樹脂により形成し、この背シェルに連結片を一体成形する。 ( 7 ) In any one of the above items (1) to ( 6 ), a back shell to be a backrest frame is formed of a synthetic resin, and a connecting piece is integrally formed on the back shell.

(ａ)請求項１記載の発明によると、背凭れを、肘掛け部の後端部と、座の下方に設けた座支持杆の後部とに固定したことにより、上下に大きく離間した２箇所で背凭れが支持されることとなる。従って、背凭れに作用する後向きの荷重に対し高い強度で支持することが可能となり、高い背凭れを取り付けることが可能になる。 (a) According to the invention described in claim 1, the backrest is fixed to the rear end portion of the armrest portion and the rear portion of the seat support rod provided below the seat, so that the backrest is greatly separated at two locations in the vertical direction. Backrest will be supported. Therefore, it becomes possible to support with high strength against a backward load acting on the backrest, and it is possible to attach a high backrest.

また、高さの大きい背凭れであっても、座と分離させて取付けることができるため、多種多様なデザインの椅子を提供することができる。
さらに、座支持杆に連結片を簡単に取付けうるとともに、両者は一体感をもって連結されるので、見栄えが良好となる。 Further, even if the backrest has a large height, it can be attached separately from the seat, so that chairs with a wide variety of designs can be provided.
Further, the connecting piece can be easily attached to the seat support rod, and both are connected with a sense of unity, so that the appearance is good.

(ｂ)請求項２記載の発明によると、左右の側部フレームの前脚に連結された連結杆に座支持杆を固着したことにより、座支持杆が実質的に左右の側部フレームにより安定して支持され、背凭れの下部も確実に固定されるとともに、側部フレームの横ぶれを防止することができる。 (b) According to the invention described in claim 2, the seat support rod is substantially stabilized by the left and right side frames by fixing the seat support rod to the connection rod connected to the front legs of the left and right side frames. The lower part of the backrest is also securely fixed, and the side frame can be prevented from shaking.

(ｃ)請求項３記載の発明によると、背凭れの下部の結合箇所が左右に離間した２箇所となるため、背凭れにかかる左右方向の荷重に対しても高強度が得られる。 (c) According to the third aspect of the present invention, since the lower portion of the backrest is joined at two places left and right, high strength can be obtained even with respect to the lateral load applied to the backrest.

(ｄ)請求項４記載の発明によると、座の後部を座支持杆により、確実にかつ安定して支持することができる。 ( d ) According to the invention of claim 4 , the rear portion of the seat can be reliably and stably supported by the seat support rod.

(ｅ)請求項５記載の発明によると、座の後部と座支持杆と連結片の連結軸とを１本のねじにより容易に結合することができ、組立時の作業能率が向上するとともに、部品点数が削減される。 ( e ) According to the invention described in claim 5 , the rear portion of the seat, the seat support rod, and the connecting shaft of the connecting piece can be easily coupled with one screw, and the work efficiency during assembly is improved. The number of parts is reduced.

(ｆ)請求項６記載の発明によると、座支持杆の取付強度が高くなるので、背凭れの支持強度も大となる。 ( f ) According to the invention of claim 6, since the mounting strength of the seat support rod is increased, the support strength of the backrest is also increased.

(ｇ)請求項７記載の発明によると、連結片を、合成樹脂よりなる背シェルと一体に形成したことにより、部品点数が少なく、かつ座支持杆との結合も簡単に行うことができる。 ( g ) According to the invention described in claim 7 , since the connecting piece is formed integrally with the back shell made of synthetic resin, the number of parts is small and the coupling with the seat support rod can be easily performed.

以下、本発明の実施形態を、添付図面を参照して説明する。
図１は、本発明の椅子の第１の実施形態を示す一部切欠き側面図、図２は、脚フレームの斜視図、図３は、背凭れと、その脚フレームへの取付部の後面図である。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a partially cutaway side view showing a first embodiment of a chair of the present invention, FIG. 2 is a perspective view of a leg frame, and FIG. 3 is a backrest and a rear surface of an attachment portion to the leg frame. FIG.

図１〜図３に示すように、本発明の椅子(１)は、脚フレーム(２)と、この脚フレーム(２)に取り付けられた背凭れ(３)および座(４)とを有している。背凭れ(３)は、背凭れのフレームを構成する合成樹脂製の枠状の背シェル(５)と、この背シェル(５)に取り付けられたメッシュ状の背当て材(６)とからなっている。座(４)は、下部の座フレーム(７)と、その上部に設けられたクッション材(８)とからなっている。 As shown in FIGS. 1 to 3, the chair (1) of the present invention has a leg frame (2), a backrest (3) and a seat (4) attached to the leg frame (2). ing. The backrest (3) is composed of a synthetic resin frame-like back shell (5) constituting the backrest frame and a mesh-like backrest material (6) attached to the back shell (5). ing. The seat (4) is composed of a lower seat frame (7) and a cushion material (8) provided on the upper portion.

図２に示すように、脚フレーム(２)は、左右１対の側部フレーム(９)(９)を有している。側部フレーム(９)は、後脚(10)と、前脚(11)と、前脚(11)における座(４)よりも上方の上端部に後向きに折曲げ形成された肘掛け部(12)とからなっている。 As shown in FIG. 2, the leg frame (2) has a pair of left and right side frames (9), (9). The side frame (9) includes a rear leg (10), a front leg (11), and an armrest (12) formed by bending backward at the upper end of the front leg (11) above the seat (4). It is made up of.

後脚(10)の上端には、横向き筒状の取付部(13)が設けられ、肘掛け部(12)の後端は、この取付部(13)の前部に固着されている。 At the upper end of the rear leg (10), a horizontal tubular mounting portion (13) is provided, and the rear end of the armrest portion (12) is fixed to the front portion of the mounting portion (13).

両前脚(11)の中間には、左右方向に向く連結杆(14)が連結されている。この連結杆(14)の左右両側部の後面には、後方に向く１対の断面楕円形の管材からなる座支持杆(15)(15)が連結されている（図６参照）。この座支持杆(15)の後端部には取付孔(16)が設けられている。 A connecting rod (14) facing in the left-right direction is connected between the front legs (11). Seat support rods (15) and (15) made of a pipe member having an elliptical cross section facing rearward are coupled to the rear surfaces of the left and right sides of the coupling rod (14) (see FIG. 6). A mounting hole (16) is provided at the rear end of the seat support rod (15).

座支持杆(15)の後端の外側面と、後脚(10)の前面との間には、補強杆(17)が連結されている。連結杆(14)における座支持杆(15)の連結部の上面には、前方に突出する、取付孔(18)付きの左右１対の取付片(19)(19)が固着されている。 A reinforcing rod (17) is connected between the outer surface of the rear end of the seat support rod (15) and the front surface of the rear leg (10). A pair of left and right mounting pieces (19) and (19) with mounting holes (18) are fixed to the upper surface of the connecting portion of the seat support rod (15) in the connecting rod (14).

図３〜図５に示すように、左右（左右対称につき、一方のみ図示する）の取付部(13)には、横向き取付孔(20)と、内側面の中央部に形成された円形凸部(21)の中心に貫通する小径の貫通孔(22)とが形成されている。 As shown in FIGS. 3 to 5, the mounting portion (13) on the left and right (only one is shown for left-right symmetry) has a lateral mounting hole (20) and a circular convex portion formed at the center of the inner surface. A small-diameter through hole (22) penetrating in the center of (21) is formed.

背シェル(５)の下方寄りの左右両側端部には、外向きに突出する取付筒部(23)が形成され、この取付筒部(23)には、外向きに開口する取付孔(24)が形成されている。取付孔(24)の奥端(25)よりも奥部、すなわち、背シェル(５)の内部には、取付孔(24)に、貫通孔(26)を介して連通する大径孔(27)と、この大径孔(27)と連通する小径孔(28)とが形成されている。 A mounting cylinder portion (23) projecting outward is formed at the left and right end portions of the back shell (5) close to the lower side, and an attachment hole (24) opening outward is formed in the mounting cylinder portion (23). ) Is formed. A large-diameter hole (27) communicating with the mounting hole (24) through the through hole (26) in the inner part of the back shell (5) from the back end (25) of the mounting hole (24). ) And a small diameter hole (28) communicating with the large diameter hole (27).

背シェル(５)の後面には、大径孔(27)と小径孔(28)とに通じる開口部(29)が形成されている（図３および図４参照）。 On the rear surface of the back shell (5), an opening (29) communicating with the large diameter hole (27) and the small diameter hole (28) is formed (see FIGS. 3 and 4).

背凭れ(３)は、次のようにして脚フレーム(２)に取り付けられている。 The backrest (3) is attached to the leg frame (2) as follows.

まず開口部(29)から座金(30)を大径孔(27)に挿入するとともに、ナット(31)を小径孔(28)に挿入する。ナット(31)は小径孔(28)に係合されて回転しないようになっている。 First, the washer (30) is inserted into the large-diameter hole (27) from the opening (29), and the nut (31) is inserted into the small-diameter hole (28). The nut (31) is engaged with the small diameter hole (28) so as not to rotate.

ついで、取付筒部(23)の取付孔(24)を取付部(13)の円形凸部(21)に嵌合させ、ボルト(32)を取付部(13)の取付孔(20)から挿入し、ナット(31)に螺合させて締付ける。これにより、背凭れ(３)の側端の下方寄りが取付部(13)に固定される。取付部(13)の取付孔(20)は、キャップ(33)により塞がれている。 Next, the mounting hole (24) of the mounting cylinder part (23) is fitted into the circular convex part (21) of the mounting part (13), and the bolt (32) is inserted from the mounting hole (20) of the mounting part (13). Then, screw into the nut (31) and tighten. Thereby, the lower side of the side end of the backrest (3) is fixed to the mounting portion (13). The attachment hole (20) of the attachment portion (13) is closed by a cap (33).

図１及び図３に示すように、背シェル(３)の下端には、前方に突出する左右１対の連結片(34)(34)が一体的に連設され、両連結片(34)の先端には、座支持杆(15)に緊密に嵌合される楕円形断面の連結軸(34a)が突設されている。 As shown in FIGS. 1 and 3, a pair of left and right connecting pieces (34) and (34) projecting forward are integrally connected to the lower end of the back shell (3). A connecting shaft (34a) having an elliptical cross section that is tightly fitted to the seat support rod (15) is projected from the front end.

図６に示すように、両連結軸(34a)を、座支持杆(15)の後端に緊密に嵌合させて、座支持杆(15)の取付孔(16)および連結軸(34a)を貫通する止ねじ(35)により、座フレーム(７)の後端部下面に固定している。 As shown in FIG. 6, both the connecting shafts (34a) are closely fitted to the rear end of the seat support rod (15), and the mounting holes (16) and the connection shaft (34a) of the seat support rod (15) are fitted. The seat frame (7) is fixed to the lower surface of the rear end portion of the seat frame (7) by a set screw (35) penetrating the shaft.

座フレーム(７)の前部は、連結杆(14)に設けられた取付片(19)上に載置され、止ねじ(36)により固定されている。なお、肘掛け部(12)上には、肘当てクッション(12a)が設けられている。 The front portion of the seat frame (7) is placed on a mounting piece (19) provided on the connecting rod (14) and fixed by a set screw (36). An elbow pad cushion (12a) is provided on the armrest (12).

図７は、第２の実施形態の椅子の脚フレーム(２)を示す斜視図である。
脚フレーム(２)は、１本の管材をほぼ側面視後向コ字状に折曲げることにより、左右１対の側部フレーム(９)(９)を有している。側部フレーム(９)(９)は、下端の前後方向を向くベース脚(37)と、その前端から上向きに折曲げられた前脚(38)と、この前脚(38)の上端部から後向きに折曲げ形成された上述と同様の肘掛け部(12)とからなっている。肘掛け部(12)の後端には、上述と同様の横向き筒状の取付部(13)が固着されている。 FIG. 7 is a perspective view showing a leg frame (2) of the chair of the second embodiment.
The leg frame (2) has a pair of left and right side frames (9), (9) by bending one pipe material in a substantially U-shape in a side view. The side frames (9) and (9) have a base leg (37) facing the front and rear direction at the lower end, a front leg (38) bent upward from the front end, and a rear end from the upper end of the front leg (38). It consists of an armrest (12) similar to that described above, which is formed by bending. At the rear end of the armrest portion (12), a horizontal cylindrical attachment portion (13) similar to the above is fixed.

両前脚(38)の中間には、左右方向に向く連結杆(14)が連結されている。この連結杆(14)の左右両側部の後部に、上述と同様の後方を向く１対の楕円形断面の管材からなる座支持杆(15)(15)が連結されている。ベース脚(37)の後端部同士は、下部連結杆(39)により連結されている。 A connecting rod (14) facing in the left-right direction is connected between the front legs (38). Seat support rods (15) (15) made of a pair of pipes having an elliptical cross section facing rearward are connected to the rear portions of the left and right sides of the connection rod (14). The rear ends of the base legs (37) are connected by a lower connecting rod (39).

左右の座支持杆(15)と、取付部(13)への背凭れ(３)および座(４)の取付構造は、第１の実施形態と同一であるので、説明を省略する。 The left and right seat support rods (15), the backrest (3) to the mounting portion (13), and the mounting structure of the seat (4) are the same as those in the first embodiment, and thus the description thereof is omitted.

以上のように、上記第１、第２の実施形態においては、背凭れ(３)の下方寄りを、肘掛け部(12)の後部に設けた取付部(13)に止ねじ(32)により固定するともに、背凭れ(３)の下端部に設けた左右１対の前方を向く連結片(34)を、脚フレーム(２)の中間部に設けた後方を向く座支持杆(15)の後端に結合したことにより、背凭れ(３)は、上下に大きく離間した２箇所で支持されることになる。 As described above, in the first and second embodiments, the lower side of the backrest (3) is fixed to the mounting portion (13) provided at the rear portion of the armrest portion (12) by the set screw (32). At the same time, the pair of left and right connecting pieces (34) provided at the lower end of the backrest (3) are connected to the rear of the seat support rod (15) provided at the middle of the leg frame (2). By connecting to the end, the backrest (3) is supported at two locations that are largely separated in the vertical direction.

これにより、背凭れ(３)に作用する後向きの荷重に対し十分な強度で支持することができ、したがって、座(４)と分離した高い背凭れ(３)を取り付けることが可能となる。 Thereby, it can support with sufficient intensity | strength with respect to the backward load which acts on the backrest (3), Therefore It becomes possible to attach the high backrest (3) isolate | separated from the seat (4).

本発明の椅子の第１の実施形態を示す側面図である。It is a side view which shows 1st Embodiment of the chair of this invention. 同じく、脚フレームの斜視図である。Similarly, it is a perspective view of a leg frame. 同じく、背凭れの後面図である。Similarly, it is a rear view of the backrest. 同じく、図３のIV部の拡大図である。Similarly, it is an enlarged view of the IV part of FIG. 同じく、図４の縦断後面図である。Similarly, it is a longitudinal rear view of FIG. 同じく、図１のVI-VI線拡大縦断後面図である。Similarly, it is the VI-VI line expansion longitudinal rear view of FIG. 本発明の第２の実施形態の椅子の脚フレームを示す斜視図である。It is a perspective view which shows the leg frame of the chair of the 2nd Embodiment of this invention.

(１)椅子
(２)脚フレーム
(３)背凭れ
(４)座
(５)背シェル
(６)背当て材
(７)座フレーム
(８)クッション材
(９)側部フレーム
(10)後脚
(11)前脚
(12)肘掛け部
(12a)肘当てクッション
(13)取付部
(14)連結杆
(15)座支持杆
(16)取付孔
(17)補強杆
(18)取付孔
(19)取付片
(20)取付孔
(21)円形凸部
(22)貫通孔
(23)取付筒部
(24)取付孔
(25)奥端
(26)貫通孔
(27)大径孔
(28)小径孔
(29)開口部
(30)座金
(31)ナット
(32)ボルト
(33)キャップ
(34)連結片
(34a)連結軸
(35)止ねじ
(36)止ねじ
(37)ベース脚
(38)前脚
(39)下部連結杆
(1) Chair
(2) Leg frame
(3) Backrest
(4) Seat
(5) Back shell
(6) Backing material
(7) Seat frame
(8) Cushion material
(9) Side frame
(10) Rear legs
(11) Front legs
(12) Armrest
(12a) Elbow pad cushion
(13) Mounting part
(14) Linkage
(15) Seat support rod
(16) Mounting hole
(17) Reinforcement rod
(18) Mounting hole
(19) Mounting piece
(20) Mounting hole
(21) Circular convex part
(22) Through hole
(23) Mounting cylinder
(24) Mounting hole
(25) Back end
(26) Through hole
(27) Large diameter hole
(28) Small diameter hole
(29) Opening
(30) Washer
(31) Nut
(32) Bolt
(33) Cap
(34) Connecting piece
(34a) Connecting shaft
(35) Set screw
(36) Set screw
(37) Base leg
(38) Front legs
(39) Bottom connection rod

Claims

In a chair in which a backrest is attached to a rear end portion of the armrest portion in a pair of left and right leg frames having an armrest portion at the top,
A seat formed of a pipe material , attached to the rear end portions of the left and right armrests, on both right and left sides of the intermediate portion of the backrest, and extending substantially horizontally rearward from the front portion of the leg frame below the seat In the opening of the rear end portion of the support rod, a substantially horizontal connecting shaft protruding from the lower end of the backrest and projecting to the front end of the connecting piece is closely fitted and connected. Characteristic chair.

The left and right leg frames are provided with side frames having front legs that face in the vertical direction, and connecting rods that connect the front legs of both side frames, and the front ends of the seat support rods are fixed rearward to the connecting rods. The chair according to claim 1.

The chair according to claim 1 or 2, wherein a pair of left and right connecting shafts of the seat support rod and the connecting piece are coupled to each other.

The chair according to any one of claims 1 to 3 , wherein the rear portion of the seat is placed and supported on a joint portion with a connecting piece in the seat support rod.

The chair according to claim 4 , wherein the rear portion of the seat, the seat support rod, and the connecting shaft of the connecting piece are fixed together by screws.

The chair according to any one of claims 1 to 5 , wherein the leg frame has a rear leg facing up and down, and the rear part of the seat support bar and the rear leg are connected by a reinforcing bar.

The chair according to any one of claims 1 to 6 , wherein a back shell serving as a backrest frame is formed of a synthetic resin, and a connecting piece is integrally formed with the back shell.