JP5259993B2

JP5259993B2 - Chair

Info

Publication number: JP5259993B2
Application number: JP2007180169A
Authority: JP
Inventors: 充礼松本
Original assignee: Okamura Corp
Current assignee: Okamura Corp
Priority date: 2007-07-09
Filing date: 2007-07-09
Publication date: 2013-08-07
Anticipated expiration: 2027-07-09
Also published as: JP2009011739A

Description

本発明は、例えば空港、病院、公共施設等の待合室などに設置されるロビーチェア、すなわち複数の単体椅子を連結して形成された連結椅子に関する。 The present invention relates to a lobby chair installed in a waiting room of an airport, a hospital, a public facility, or the like, for example, a connected chair formed by connecting a plurality of single chairs.

この種の椅子としては、例えば特許文献１に記載されているものがある。
特開２００６−１８７５３４号公報 An example of this type of chair is described in Patent Document 1.
JP 2006-187534 A

上記特許文献１に記載されている椅子においては、脚フレームに、前後方向を向く左右１対のブラケットを溶接により固着し、両ブラケットの上面と後端とに、それぞれ、座体の一部を構成する座フレームと、背凭れを支持する左右１対の背フレームとを、ねじにより個別に取付けているため、部品点数や組立工数が増大し、複数の単体椅子を連結して形成されるこの種の連結椅子としては、コストが高いものとなっている。 In the chair described in Patent Document 1, a pair of left and right brackets facing in the front-rear direction are fixed to the leg frame by welding, and a part of the seat is attached to the upper surface and the rear end of both brackets. Since the seat frame and the pair of left and right back frames that support the backrest are individually attached with screws, the number of parts and the number of assembly steps are increased, and this is formed by connecting a plurality of single chairs. As a kind of connecting chair, the cost is high.

また、左右の背フレームの下端部が、左右のブラケットの後端にほぼ垂直に取付けられており、背フレームが後向きに強く押圧された際に、背フレームの下端部とブラケットとの取付部付近に大きな曲げ荷重が加わるので、その荷重に耐えうるように、ブラケットと背フレームとの結合部の上下寸法を大として、結合強度を高める必要があり、その結果、結合部が目立ちすぎて体裁が悪くなる。
さらに、座体の後端と背当てクッションの下端との間に隙間が形成され、連結椅子としての体裁が損なわれる恐れがある。 In addition, the lower ends of the left and right back frames are mounted almost perpendicularly to the rear ends of the left and right brackets, and when the back frame is strongly pressed rearward, near the lower frame end and bracket mounting portion Because a large bending load is applied to the bracket, it is necessary to increase the coupling strength by increasing the vertical dimension of the joint between the bracket and the back frame so that the joint can withstand that load. Deteriorate.
Furthermore, a gap is formed between the rear end of the seat body and the lower end of the back cushion, which may impair the appearance of the connecting chair.

本発明は、上記問題点に鑑みてなされたもので、座体と背凭れとを、左右１対の側部フレームに取付けることにより、部品点数と取付工数を削減し、コスト低減を図れるようにするとともに、左右の側部フレームの屈曲部の剛性を高めうるよう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 attaching the seat body and the backrest to a pair of left and right side frames, the number of parts, the number of mounting steps can be reduced, and the cost can be reduced. In addition, an object of the present invention is to provide a chair that can increase the rigidity of the bent portions of the left and right side frames.

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）座体の側部を支持する前後方向を向く座フレームの後端に、屈曲部を介して、背凭れの側部を支持する背フレームを上向きに連設してなる左右１対の側部フレームにおける前記座フレームを、脚体上部の左右方向を向く横杆に固着し、かつ両側部フレームにおける前記屈曲部同士を、左右方向を向く連結部材により互いに連結する。 According to the present invention, the above problem is solved as follows.
(1) A pair of left and right pairs formed by connecting a back frame that supports the side part of the backrest upwardly through a bent part at the rear end of the seat frame that faces the front and rear direction that supports the side part of the seat body. The seat frame in the side frame is fixed to a horizontal reed facing the left and right direction of the upper portion of the leg, and the bent portions in the side frame are connected to each other by a connecting member facing in the left and right direction.

（２）上記(１)項において、連結部材により、座体の後端と背凭れの下端との間に形成される隙間を閉塞する。 (2) In the above item (1), the connecting member closes a gap formed between the rear end of the seat body and the lower end of the backrest.

（３）上記(１)または(２)項において、左右の側部フレームにおける座フレームの少なくとも前端部同士を、座体の下面に設けた底部連結部材により互いに連結する。 (3) In the above item (1) or (2), at least the front end portions of the seat frames in the left and right side frames are connected to each other by a bottom connecting member provided on the lower surface of the seat body.

（４）上記(１)〜(３)項のいずれかにおいて、連結部材を、前下方を向いて座体の後端と背凭れの下端との間の隙間を閉塞しうる基片と、その前端に連設された下向片とからなるものとする。 (4) In any one of the above items (1) to (3), the base member that faces the front lower side and closes the gap between the rear end of the seat body and the lower end of the backrest; It shall consist of the downward piece connected with the front end.

（５）上記(１)〜(４)項のいずれかにおいて、左右の側部フレームにおける屈曲部の内方の上面と内側面との角部に、内側方と上方とに開口する凹入段部を設け、両凹入段部に、連結部材の両側端部を嵌合し、かつ両屈曲部の内側面に突設した内向突片の上面に、連結部材の両側端部下面に突設した突部の下端を当接させて、内向突片の下方より挿入した取付ねじを前記突部に設けためねじ孔に螺合することにより、左右の屈曲部に連結部材の両側端部を固定する。 (5) In any one of the above items (1) to (4), the indented step opening inward and upward at the corner between the inner upper surface and the inner side surface of the bent portion in the left and right side frames. The both end portions of the connecting member are fitted to the both recessed step portions, and the upper surface of the inward projecting piece projecting from the inner surface of both bent portions is provided on the lower surface of the both end portions of the connecting member. Fix the both ends of the connecting member to the left and right bent parts by bringing the mounting screws inserted from below the inwardly protruding pieces into contact with the screw holes so that the lower ends of the protruding parts are brought into contact with each other. To do.

（６）上記(５)項において、屈曲部における内向突片の下方を、左右の側部フレームにおける背フレームに取付けた後面板の下端部により覆う。 (6) In the above item (5), the lower part of the inwardly protruding piece in the bent portion is covered with the lower end portion of the rear plate attached to the back frame in the left and right side frames.

上記(１)項に記載の発明によれば、座体と背凭れとを、脚体の横杆に直接固着された左右１対の側部フレームにおける座フレームと背フレームにより支持しているので、部品点数及び脚体への取付工数が削減され、コスト低減が図れる。
また、左右の側部フレームは、その屈曲部同士が、左右方向を向く連結部材により互いに連結されているので、屈曲部に加わる曲げ荷重が連結部材にも分散されて加わる。従って、屈曲部の曲げ剛性が大となり、屈曲部に背凭れからの大きな曲げ荷重が加わっても、その部分の強度は十分に保たれ、左右の背フレームにより背凭れを安定して支持することができる。 According to the invention described in the above item (1) , the seat body and the backrest are supported by the seat frame and the back frame in the pair of left and right side frames that are directly fixed to the lateral surface of the leg. In addition, the number of parts and the number of man-hours for mounting on the legs are reduced, and the cost can be reduced.
Further, since the bent portions of the left and right side frames are connected to each other by a connecting member facing in the left-right direction, a bending load applied to the bent portion is also distributed and applied to the connecting member. Therefore, the bending rigidity of the bent part becomes large, and even if a large bending load from the backrest is applied to the bent part, the strength of that part is sufficiently maintained, and the backrest is stably supported by the left and right back frames. Can do.

上記(２)項に記載の発明によれば、連結部材により、座体の後端と背凭れの下端との間の隙間が閉塞されるので、椅子の体裁が向上する。 According to the invention described in the above item (2), since the gap between the rear end of the seat body and the lower end of the backrest is closed by the connecting member, the appearance of the chair is improved.

上記(３)項に記載の発明によれば、左右の座フレームの前端部同士を、座体の下面に設けた底部連結部材により連結しているので、左右の側部フレーム同士の連結強度が大となるとともに、座体も左右の座フレームにより安定して支持されるようになる。 According to the invention described in (3) above, the front end portions of the left and right seat frames are connected by the bottom connecting member provided on the lower surface of the seat body, so that the connection strength between the left and right side frames is high. As the size increases, the seat body is also stably supported by the left and right seat frames.

上記(４)項に記載の発明によれば、連結部材の曲げ及び捩り剛性が高まるので、両側部フレームの屈曲部の曲げや捩り剛性も大となる。 According to the invention described in the above item (4) , since the bending and torsional rigidity of the connecting member is increased, the bending and torsional rigidity of the bent portions of both side frames are also increased.

上記(５)項に記載の発明によれば、連結部材を、左右の側部フレームの屈曲部に、左右方向の位置決めをした状態で容易に取付けることができるとともに、連結部材の両側端部が凹入段部に嵌合されているので目立たず、見栄えがよい。
また、連結部材を、左右の屈曲部に、その下方より挿入した取付ねじのみにより容易に固定することができる。
さらに、屈曲部の内向突片と、連結部材の側端部下面の突部とを取付ねじにより固定しているので、屈曲部と連結部材の側端部との固定部の断面形状が大となり、屈曲部の曲げ剛性がより高まる。 According to the invention described in the above (5) , the connecting member can be easily attached to the bent portions of the left and right side frames while being positioned in the left-right direction, and both end portions of the connecting member are Since it is fitted into the recessed step, it is not noticeable and looks good.
Further, the connecting member can be easily fixed to the left and right bent portions only with the mounting screws inserted from below.
Furthermore, since the inwardly projecting piece of the bent portion and the protruding portion on the lower surface of the side end portion of the connecting member are fixed by mounting screws, the sectional shape of the fixing portion between the bent portion and the side end portion of the connecting member becomes large. Further, the bending rigidity of the bent portion is further increased.

上記(６)項に記載の発明によれば、内向突片の下方が後面板の下端部により覆われているので、内向突片や取付ねじの頭部が外部に露呈せず、椅子の体裁が向上する。 According to the invention described in (6) above, since the lower part of the inward projecting piece is covered by the lower end portion of the rear plate, the inward projecting piece and the head of the mounting screw are not exposed to the outside, and the appearance of the chair Will improve.

以下、本発明の実施形態を、図面に基づいて説明する。
図１は、本発明の複数(実施形態では２個)の単体の椅子１(右方の椅子は、背凭れの背当てを取外してある)を備えるロビーチェアの斜視図、図２は、単体の椅子１の中央縦断拡大側面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a lobby chair provided with a plurality of (two in the embodiment) single chair 1 (the right chair has a backrest removed from the backrest) according to the present invention, and FIG. It is a center longitudinal cross-section enlarged side view of the chair 1.

各椅子１を支持している脚体２は、前後方向に鈍角をなして拡開する側面視山形状のアルミニウム合金等よりなる左右１対の支持脚３、３と、それらの上端部間に横架された角形鋼管よりなる横杆４とからなっている。横杆４の両側端部の開口部は、キャップ５により体裁よく閉塞されている。 A leg 2 supporting each chair 1 is formed between a pair of left and right support legs 3 and 3 made of an aluminum alloy having a mountain shape in a side view and expanding at an obtuse angle in the front-rear direction, and between the upper ends thereof. It consists of a horizontal rod 4 made of a horizontal steel tube. Openings at both side ends of the reed 4 are closed by the cap 5 in a good appearance.

各椅子１は、前後方向を向く座フレーム６aと、その後端に連設された側面視凹曲面状の屈曲部６bと、この屈曲部６bの上端よりやや後方に傾斜させて起立し、上端部が後ろ向きに折曲された背フレーム６ｃとからなる側面視ほぼ前向きＬ字状の左右１対の側部フレーム６、６を備えている。 Each chair 1 stands upright with a seat frame 6a facing in the front-rear direction, a bent portion 6b having a concave curved shape when viewed from the side, and inclined slightly rearward from the upper end of the bent portion 6b. Is provided with a pair of left and right side frames 6, 6 that are substantially L-shaped in a side view and are formed of a back frame 6c bent backward.

各側部フレーム６の座フレーム６aは、後方に向かって漸次厚肉とされ、後端部の下面には、取付部７が下向きに突設され、その下端部には、側面視下向きコ字状の嵌合溝８が形成されている。
各椅子１における外側の側部フレーム６は、脚体２における左右の支持脚３と横杆４とに、次のようにして結合されている。 The seat frame 6a of each side frame 6 is gradually thickened toward the rear, and a mounting portion 7 protrudes downward from the lower surface of the rear end portion, and the lower end portion thereof has a U-shape that faces downward. A shaped fitting groove 8 is formed.
The outer side frame 6 in each chair 1 is coupled to the left and right support legs 3 and the reeds 4 in the leg 2 as follows.

左右の支持脚３の頂部に形成された側面視上向きコ字状の嵌合溝９に、横杆４の両端部の下半部を嵌合した後、両外側の側部フレーム６、６における座フレーム６aの取付部７の嵌合溝８を、横杆４の両端部の上半部に、支持脚３の頂端と取付部７の下端間に僅かの隙間が形成されるようにして嵌合させる。 In the side frames 6 and 6 on the outer sides, the lower half portions of both ends of the horizontal bar 4 are fitted into fitting grooves 9 formed in the tops of the left and right support legs 3 in an upward U-shape. Fit the fitting groove 8 of the mounting portion 7 of the seat frame 6a into the upper half of both ends of the horizontal flange 4 so that a slight gap is formed between the top end of the support leg 3 and the lower end of the mounting portion 7. Combine.

ついで、支持脚３の頂部の下方より挿入した前後２本のボルト１０、１０を、座フレーム６ａの取付部７に設けた前後２個のめねじ孔１１、１１に螺合させて締め付ける。これにより、左右の支持脚３、３と、横杆４の両側端部と、両外側の側部フレーム６とが、一体的に結合されている。 Next, the two front and rear bolts 10 and 10 inserted from below the top of the support leg 3 are screwed into the two front and rear female screw holes 11 and 11 provided in the mounting portion 7 of the seat frame 6a and tightened. As a result, the left and right support legs 3, 3, both side end portions of the reed 4, and the outer side frame 6 are integrally coupled.

各椅子１の内側の側部フレーム６、６は、その座フレーム６aの取付部７を横杆４の上半部に嵌合した後、この取付部７と、横杆４の下半部に嵌合した側面視上向きコ字状の取付金具１２とを、上記と同様、取付金具１２の下方より挿入したボルトを取付部７のめねじ孔(いずれも図示略)に螺合させて締め付けることにより、横杆４の中央部に固着されている(図１参照)。 The side frames 6 and 6 on the inner side of each chair 1, after fitting the mounting portion 7 of the seat frame 6 a to the upper half of the horizontal frame 4, The fitting metal fitting 12 that is U-shaped when viewed from the side is tightened by screwing a bolt inserted from below the fitting metal fitting 12 into a female screw hole (both not shown) in the same manner as described above. Thus, it is fixed to the central portion of the reed 4 (see FIG. 1).

各椅子１における左右の側部フレーム６、６の屈曲部６b同士は、アルミニウム合金等よりなる連結部材１３により、次のようにして連結されている。
図２に示すように、連結部材１３は、左右方向を向き、かつ屈曲部６bとほぼ同じ曲率で下向き凹状に湾曲する平板状の基片１３aと、その前端縁に若干後下方を向くように連設された下向片１３bとからなり、基片１３aの両側端部の下面(一方のみ図示する)には、斜め後ろ下方を向く前後２個の突部１４、１４が、一体的に突設されている。 The bent portions 6b of the left and right side frames 6 and 6 in each chair 1 are connected by a connecting member 13 made of an aluminum alloy or the like as follows.
As shown in FIG. 2, the connecting member 13 faces the left and right directions and has a flat plate-like base piece 13a that is curved in a downwardly concave shape with substantially the same curvature as the bent portion 6b, and its front end edge faces slightly rearward and downward. It consists of a downwardly extending piece 13b provided continuously, and on the lower surface (only one is shown) of both end portions of the base piece 13a, two front and rear protrusions 14 and 14 facing obliquely backward and downward are integrally projected. It is installed.

図３の拡大断面図に示すように、左右の側部フレーム６における屈曲部６bの内側面の上下方向の中間部(左右対称で同一形状に付き、一方のみ図示する)に対向状に突設された前後２個の内向突片１５、１５の上面に、上記突部１４、１４の下端を当接させた状態で、両内向突片１５に設けられ通孔１６に下方より挿入した取付ねじ１７の上端部を、突部１４のめねじ孔１８に螺合することにより、連結部材１３の両側端部は、左右の側部フレーム６における屈曲部６bの上面に、それらの対向面に形成された後記する凹入段部２８に嵌合されるようにして固定され、これによって、左右の側部フレーム６の屈曲部６b同士が、連結部材１３により互いに連結されている。 As shown in the enlarged cross-sectional view of FIG. 3, the left and right side frames 6 project in an opposing manner at an intermediate portion in the vertical direction of the inner surface of the bent portion 6 b (symmetrically and in the same shape, only one is shown). Mounting screws provided on both inwardly projecting pieces 15 and inserted into the through holes 16 from below with the upper ends of the two front and rear inwardly projecting pieces 15 and 15 in contact with the lower ends of the projecting parts 14 and 14. By screwing the upper end portion of 17 into the female screw hole 18 of the protrusion 14, both end portions of the connecting member 13 are formed on the upper surfaces of the bent portions 6 b of the left and right side frames 6 on their opposing surfaces. The bent portions 6 b of the left and right side frames 6 are connected to each other by the connecting member 13.

このように、左右の側部フレーム６における屈曲部６b同士を、連結部材１３により連結すると、屈曲部６bに加わる曲げ荷重が、連結部材１３にも分散されて加わる。従って、屈曲部６bの曲げ剛性が大となり、屈曲部６bに後記する背凭れ１９からの大きな曲げ荷重が加わっても、その部分の強度は十分に保たれ、左右の背フレーム６cにより背凭れ１９を安定して支持することができる。
また、屈曲部６bの内向突片１５と、連結部材１３の側端部下面の突部１４とを取付ねじ１７により固定しているので、屈曲部６bと連結部材１３の側端部との固定部の断面形状が大となり、屈曲部６bの曲げ剛性をより高めることができる。 As described above, when the bent portions 6 b in the left and right side frames 6 are connected to each other by the connecting member 13, the bending load applied to the bent portion 6 b is also distributed and added to the connecting member 13. Accordingly, the bending rigidity of the bent portion 6b is increased, and even when a large bending load from the backrest 19 described later is applied to the bent portion 6b, the strength of the portion is sufficiently maintained, and the backrest 19 is supported by the left and right back frames 6c. Can be stably supported.
Further, since the inwardly protruding piece 15 of the bent portion 6b and the protruding portion 14 on the lower surface of the side end portion of the connecting member 13 are fixed by the mounting screw 17, the bent portion 6b and the side end portion of the connecting member 13 are fixed. The sectional shape of the portion becomes large, and the bending rigidity of the bent portion 6b can be further increased.

各椅子１の左右の側部フレーム６における背フレーム６cには、背凭れ１９が取付けられている。
背凭れ１９は、板金製パンチングプレートよりなる後面板２０と、その前方の前後方向に弾性変形可能な合成樹脂製の背板２１と、背板２１の前面に取付けられたクッション材よりなる背当て２２とからなっている。 A backrest 19 is attached to the back frame 6 c of the left and right side frames 6 of each chair 1.
The backrest 19 includes a rear plate 20 made of a sheet metal punching plate, a synthetic resin back plate 21 that can be elastically deformed in the front-rear direction, and a backrest made of a cushion material attached to the front surface of the back plate 21. It consists of 22.

後面板２０は、左右の側部フレーム６、６における屈曲部６bと背フレーム６cの対向面間の後部を塞ぐ大きさとされ、その左右の側端部を、図３〜図６に示すように、両側部フレーム６の屈曲部６bと背フレーム６cの対向面に形成された、後面板２０の板厚よりも溝幅の大きな内側方に開口する平面視内向きコ字状断面の取付溝２３(左右対称に付き、一方のみ図示する)に嵌合することにより、左右の側部フレーム６、６間の後端部に、両側部フレーム６により挟持されるようにして取付けられている。 The rear plate 20 is sized to block the rear portion between the opposing surfaces of the bent portion 6b and the back frame 6c in the left and right side frames 6, 6, and the left and right side end portions thereof are as shown in FIGS. The mounting groove 23 having an inwardly U-shaped cross-section in plan view and formed in the opposite surface of the bent portion 6b of the both side frames 6 and the back frame 6c and opening inwardly with a groove width larger than the plate thickness of the rear plate 20. It is attached so as to be sandwiched by both side frames 6 at the rear end portion between the left and right side frames 6, 6 by being fitted (symmetrically attached, only one is shown).

背板２１は、側部フレーム６の前面の形状に沿う形状に形成され、後面には、図７に示すように、格子状をなす補強リブ２４が突設されている。
また、背板２１の後面の中央部、すなわち、通常使用時において座者の背中が強く当たる部分よりも若干上方の中央部と、それより上方の上端部付近の左右両側部とには、それぞれ、補強リブ２４よりも突出寸法の大きな４個と左右１対づつの突部２５が、後向きに突設されている。
さらに、背板２１の後面における上方寄りの左右両側部には、図９にも示すように、左右両側方と下方に開口する下向き鉤状の係止フック２６、２６(図９においては一方のみ図示)が突設されている。
背板２１の下端部の両側部には、左右１対のだるま状の係合孔２７、２７が穿設されている(図８参照)。 The back plate 21 is formed in a shape that conforms to the shape of the front surface of the side frame 6, and, as shown in FIG. 7, reinforcing ribs 24 that form a lattice shape project from the rear surface.
Further, in the central portion of the rear surface of the back plate 21, that is, the central portion slightly above the portion where the back of the seater hits strongly during normal use, and the left and right side portions near the upper end portion above it, Four protrusions 25 having a larger projecting dimension than the reinforcing ribs 24 and a pair of left and right protrusions 25 are provided so as to protrude rearward.
Further, as shown in FIG. 9, on the left and right sides of the rear surface of the back plate 21 on the upper side, downward hook-like locking hooks 26 and 26 that open to the left and right sides and downward (only one in FIG. 9). (Shown) is provided.
On both sides of the lower end of the back plate 21, a pair of left and right daruma-shaped engagement holes 27, 27 are formed (see FIG. 8).

背板２１は、左右の側部フレーム６の前面に、次のようにして取付けられている。
図３〜図６に示すように、左右の側部フレーム６における屈曲部６bの内方の上面と背フレーム６cの内方の前面には、平面視Ｌ字状をなして後下方と後方に凹入する凹入段部２８(左右対称に付き、一方の側部フレームのみ図示する)が、上下方向に連続して形成され、図６および図８に示すように、背フレーム６cの凹入段部２８の下端部には、拡径頭部付きの段付きねじ２９が螺着されている。
また、図９に示すように、左右の側部フレーム６(一方のみ図示する)における背フレーム６cの上方寄りの内側面には、係止突片３０が、内向きに突設されている。 The back plate 21 is attached to the front surfaces of the left and right side frames 6 as follows.
As shown in FIGS. 3 to 6, the inner upper surface of the bent portion 6b and the inner front surface of the back frame 6c in the left and right side frames 6 are L-shaped in plan view and are rearwardly downward and rearward. A recessed step 28 (symmetrically attached, only one side frame is shown) is formed continuously in the vertical direction. As shown in FIGS. 6 and 8, the recessed portion of the back frame 6c is recessed. A stepped screw 29 with an enlarged diameter head is screwed to the lower end of the stepped portion 28.
Further, as shown in FIG. 9, locking protrusions 30 project inwardly on the inner surface of the left and right side frames 6 (only one is shown) near the upper side of the back frame 6c.

上記左右の側部フレーム６の係止突片３０に、背板２１の左右の係止フック２６を、上方より係合させるとともに、左右の側部フレーム６の段付きねじ２９に、背板２１の左右の係合孔２７を落とし込んで係合させることにより、背板２１及び背当て２２は、それらの両側端部が左右の側部フレーム６の凹入段部２８に嵌合されるようにして取付けられている。 The left and right locking hooks 26 of the back plate 21 are engaged with the locking protrusions 30 of the left and right side frames 6 from above, and the back plate 21 is connected to the stepped screws 29 of the left and right side frames 6. The left and right engagement holes 27 are dropped and engaged, so that the back plate 21 and the backrest 22 are fitted to the recessed step portions 28 of the left and right side frames 6 at their both side ends. Installed.

図４及び図９に示すように、左右の側部フレーム６の上端に連設された後向き折曲部６ｄに下方より挿入した止めねじ３１を、背板２１の上端に連設された後向き折曲部２１aの両側端部下面のめねじ孔３２に螺合することにより、背板２１の上方への外れ止めがなされている。なお、背板２１の前面に取付けられた背当て２２の下端前部を、図１に示すように、連結部材１３の上端部の前上方に位置させることにより、左右の側部フレーム６における屈曲部６bの上端部間に形成される開放空間が、連結部材１３の上端部と、背当て２２の下端部とにより閉塞されるようにしてある。 As shown in FIGS. 4 and 9, the setscrew 31 inserted from below into the rearward bent portion 6 d connected to the upper ends of the left and right side frames 6 is connected to the upper end of the back plate 21. The back plate 21 is prevented from coming off upward by being screwed into the female screw holes 32 on the lower surfaces of both end portions of the curved portion 21a. In addition, as shown in FIG. 1, the lower end front portion of the backrest 22 attached to the front surface of the back plate 21 is positioned in front of the upper end portion of the connecting member 13, thereby bending the left and right side frames 6. The open space formed between the upper end portions of the portion 6 b is closed by the upper end portion of the connecting member 13 and the lower end portion of the backrest 22.

上記のようにして、背板２１を左右の側部フレーム６に取付けると、図１及び図５に示すように、背板２１の後面に突設した複数の突部２５の後端が、後面板２０の前面に、これを後方に僅かに押圧するように圧接し、それ以外の背板２１の後面は、後面板２０の前面より離間し、互いの対向面間には隙間Ｓが形成されるようになっている。 When the back plate 21 is attached to the left and right side frames 6 as described above, as shown in FIGS. 1 and 5, the rear ends of the plurality of protrusions 25 protruding from the rear surface of the back plate 21 are The back plate 21 is pressed against the front surface of the face plate 20 so that it is slightly pressed backward, and the rear surface of the other back plate 21 is separated from the front surface of the rear plate 20, and a gap S is formed between the opposing surfaces. It has become so.

このようにすると、後面板２０が、突部２５により後方に若干押圧されるため、側部フレーム６の取付溝２３の溝幅が後面板２０の板厚よりも大きくても、取付溝２３内において後面板２０が前後方向にがたついたり、後面板２０と背板２１との間にがたが発生して、当接音等を発したりするのが防止される。しかも、取付溝２３の溝幅を、後面板２０の板厚よりも大としてあるので、後面板２０の取付けが容易となる。
また、背板２１における突部２５を除いた部分、特に、通常使用時において背中が強く当接する中央部よりもやや下側の部分の背板２１が、隙間Ｓの範囲内で後方に適度に撓むことができるので、快適な座り心地が得られる。 In this case, the rear plate 20 is slightly pressed rearward by the protrusions 25, so that even if the groove width of the mounting groove 23 of the side frame 6 is larger than the plate thickness of the rear plate 20, In this case, it is possible to prevent the rear plate 20 from rattling in the front-rear direction and the occurrence of rattling between the rear plate 20 and the back plate 21 to generate contact noise or the like. Moreover, since the groove width of the attachment groove 23 is larger than the plate thickness of the rear plate 20, the rear plate 20 can be easily attached.
Further, the portion of the back plate 21 excluding the protrusion 25, particularly the back plate 21 slightly lower than the central portion where the back strongly contacts during normal use, is moderately rearward within the gap S. Since it can bend, a comfortable sitting comfort can be obtained.

さらに、背中全体で背凭れ１９を強く押圧した際の荷重は、各突部２５を介して後面板２０により受支されるので、背板２１を含む背凭れ１９全体が、後方に過度に撓む恐れはない。
上端部の左右１対の突部２５を、係止フック２６よりも上方に設けて、後面板２０に圧接させているので、係止フック２６よりも上方に位置する部分の背板２１が、後面板２０より離間して、前後方向にがたついたりするのが防止される。 Furthermore, since the load when the backrest 19 is strongly pressed by the entire back is received and supported by the rear plate 20 through each protrusion 25, the entire backrest 19 including the back plate 21 is excessively bent backward. There is no fear.
Since the pair of left and right protrusions 25 on the upper end are provided above the locking hook 26 and are pressed against the rear plate 20, the portion of the back plate 21 positioned above the locking hook 26 is It is prevented from rattling in the front-rear direction away from the rear plate 20.

後面板２０は、その両側端部が、左右の側部フレーム６の対向面に形成された取付溝２３に嵌合して取付けられ、ねじ等の固定手段を用いていないので、取付けが容易であり、また取外して分別廃棄する際の作業能率もよい。 The rear plate 20 is attached by fitting both end portions thereof to fitting grooves 23 formed on the opposing surfaces of the left and right side frames 6 and does not use fixing means such as screws. There is also good work efficiency when removing and separating.

背板２１及び背当て２２は、左右の側部フレーム６の前面の凹入段部２８に嵌合されているので、それらが左右方向に位置ずれしたりすることがなく、側部フレーム６に安定よく取付けることができる。 Since the back plate 21 and the backrest 22 are fitted in the recessed step portions 28 on the front surfaces of the left and right side frames 6, they are not displaced in the left and right directions. It can be installed stably.

各椅子１における左右の側部フレーム６の座フレーム６aには、座体３３が取付けられている。
図２及び図１０〜図１３に示すように、座体３３は、板金製の底部連結部材３４と、その上面に取付けられた合成樹脂製の座板３５と、座板３５の上面に取付けられたクッション材３６とからなっている。 A seat body 33 is attached to the seat frames 6 a of the left and right side frames 6 in each chair 1.
As shown in FIG. 2 and FIGS. 10 to 13, the seat body 33 is attached to the bottom connecting member 34 made of sheet metal, the synthetic resin seat plate 35 attached to the upper surface thereof, and the upper surface of the seat plate 35. And cushioning material 36.

底部連結部材３４は、図１４の斜視図にも示すように、前端部(斜め左上方が前)が若干前下方に傾斜するとともに、前端が側面視後向き倒立Ｌ字状をなすように上向きに折曲された方形平板状をなし、上面の中央部には、補強板３７が、スポット溶接等により固着されている。
底部連結部材３４の左右両側部は、後端に向かって漸次左右幅が大となるように、若干上向きに折曲してある。 As shown in the perspective view of FIG. 14, the bottom connecting member 34 has a front end portion (oblique upper left is forward) slightly inclined forward and downward, and the front end is upward so as to form an inverted L-shape facing backward as viewed from the side. A bent flat plate shape is formed, and a reinforcing plate 37 is fixed to the center of the upper surface by spot welding or the like.
The left and right sides of the bottom connecting member 34 are bent slightly upward so that the lateral width gradually increases toward the rear end.

座板３５は、左右寸法と前後寸法が底部連結部材３４のそれよりも所定寸法大とされ、左右の両側端部下面には、下向突部３５a、３５aが前後方向に向かって連設され、また両下向突部３５aを除いた下面には、互いに平行をなして前後方向を向く複数の補強リブ３８と、これら各補強リブ３８と連続する底面視Ｘ字状の補強リブ３９とが、下向きに突設されている。なお、両下向突部３５aの対向面間の寸法は、底部連結部材３４の左右寸法よりも若干大とされている。 The seat plate 35 has a left-right dimension and a front-rear dimension that are larger than those of the bottom connecting member 34, and downward projections 35a, 35a are continuously provided in the front-rear direction on the lower surfaces of the left and right side ends. In addition, a plurality of reinforcing ribs 38 that are parallel to each other and face in the front-rear direction, and X-shaped reinforcing ribs 39 that are continuous with these reinforcing ribs 38 are formed on the lower surface excluding the two downward projecting portions 35a. , Protruding downwards. It should be noted that the dimension between the opposing surfaces of the two downward projections 35a is slightly larger than the lateral dimension of the bottom connecting member 34.

底部連結部材３４は、左右の側部フレーム６における座フレーム６aに、次のようにして取付けられている。
図１１〜図１３に示すように、左右の側部フレーム６における座フレーム６aの内方の上面には、上方と内側方とに開口する正面視Ｌ字状をなす、座体３３支持用の凹入段部４０(左右対称で同一形状に付き、一方のみ図示する)が、上記凹入段部２８と連続するようにして形成され、この左右の凹入段部４０の内方の上面により、底部連結部材３４の両側端部を支持した状態で、その前後左右の４箇所が、ボルト４１により固定されている。 The bottom connecting member 34 is attached to the seat frame 6a in the left and right side frames 6 as follows.
As shown in FIGS. 11 to 13, the inner upper surface of the seat frame 6 a in the left and right side frames 6 is L-shaped in a front view that opens upward and inward, for supporting the seat body 33. A recessed step 40 (symmetrically attached to the same shape, only one of which is shown) is formed so as to be continuous with the recessed step 28, and is formed by the inner upper surface of the left and right recessed steps 40. In the state where the both side ends of the bottom connecting member 34 are supported, the front, rear, left and right four places are fixed by bolts 41.

すなわち、図１１及び図１３に示すように、底部連結部材３４の前後左右の四隅部に穿設された取付孔４２(図１４参照)に上方より挿入したボルト４１を、左右の座フレーム６aの凹入段部４０における前端部と後端部に設けためねじ孔４３に螺合することにより、底部連結部材３４は、左右の側部フレーム６の座フレーム６a間にまたがって固着されている。なお、図１２に示すように、底部連結部材３４の前後方向の中央部の両側端部は、座フレーム６aの凹入段部４０の内方に突設された内向支持片４４により受支されている。 That is, as shown in FIGS. 11 and 13, bolts 41 inserted from above into mounting holes 42 (see FIG. 14) drilled in the four front and rear corners of the bottom connecting member 34 are attached to the left and right seat frames 6a. The bottom connecting member 34 is secured between the seat frames 6 a of the left and right side frames 6 by being screwed into the screw holes 43 to be provided at the front end portion and the rear end portion of the recessed stepped portion 40. As shown in FIG. 12, both end portions of the center portion in the front-rear direction of the bottom connecting member 34 are supported by inward support pieces 44 projecting inwardly from the recessed stepped portion 40 of the seat frame 6a. ing.

図１１及び図１４に示すように、座板３５の下面には、めねじ孔４５を有する前後左右４個の円筒状突部４６が、下向きに突設され、この各突部４６の下端を、底部連結部材３４の四隅部により支持した状態で、上記取付孔４２よりも若干内方の四隅部に設けた通孔４７に下方より挿入したボルト４８を、各突部４６のめねじ孔４５に螺合することにより、座板３５は、その左右の下向突部３５aの下端面が凹入段部４０における底部連結部材３４の取付部よりも外方の上面に当接するようにして、底部連結部材３４の上面に取付けられている。なお、座板３５の取付後において、その下面のリブ３８、３９の下端は、底部連結部材３４及び補強板３７の上面に当接または近接している。 As shown in FIGS. 11 and 14, on the lower surface of the seat plate 35, four front and rear cylindrical protrusions 46 having female screw holes 45 are provided so as to protrude downward. The bolts 48 inserted from below into the through holes 47 provided at the four corners slightly inward of the mounting holes 42 in a state of being supported by the four corners of the bottom connecting member 34 are the female screw holes 45 of the respective protrusions 46. The seat plate 35 is configured so that the lower end surface of the left and right downward projecting portions 35a abuts the upper surface of the recessed stepped portion 40 on the outer side of the mounting portion of the bottom connecting member 34, It is attached to the upper surface of the bottom connecting member 34. After the seat plate 35 is attached, the lower ends of the ribs 38 and 39 on the lower surface thereof are in contact with or close to the upper surfaces of the bottom connecting member 34 and the reinforcing plate 37.

図２に示すように、座板３５の上面には、クッション材３６が、その後端下部を、側部フレーム６の屈曲部６bに設けた連結部材１３の前端と当接または近接させるとともに、後端上部が、連結部材１３における基片１３aの前上方に位置するようにして、取付けられている。従って、背凭れ１９における背当て２２の下端と、座体３３のクッション３６の後端との間に形成される隙間が、連結部材１３により体裁よく塞がれている。 As shown in FIG. 2, on the upper surface of the seat plate 35, the cushion material 36 makes the rear end lower part abut or approach the front end of the connecting member 13 provided on the bent part 6b of the side frame 6, and the rear part. The upper end portion is attached so as to be positioned in front of the base piece 13a of the connecting member 13. Therefore, the gap formed between the lower end of the backrest 22 in the backrest 19 and the rear end of the cushion 36 of the seat body 33 is closed with good appearance by the connecting member 13.

上記のように、左右の側部フレーム６における座フレーム６aに、底部連結部材３４の両側端部を固着し、かつ両側端部の下向突部３５aを座フレーム６aの上面に載置した状態で、座板３５を、座フレーム６aよりも内方の底部連結部材３４の上面に取付けると、左右の側部フレーム６における座フレーム６aが底部連結部材３４により強化され、左右方向にぐらつくのが防止されるとともに、座板３５に加わる荷重が、底部連結部材３４により受支されるので、座体３３全体の中央部が下方に過度に撓むのが防止される。従って、座板３５を薄肉に成形することが可能となり、材料費や金型の製作費等が節約されるとともに、座体３３全体の上下寸法も小さくなるので、椅子の体裁がよくなる。 As described above, the both end portions of the bottom connecting member 34 are fixed to the seat frame 6a in the left and right side frames 6, and the downward projecting portions 35a of both end portions are placed on the upper surface of the seat frame 6a. When the seat plate 35 is attached to the upper surface of the bottom connecting member 34 inward of the seat frame 6a, the seat frame 6a in the left and right side frames 6 is strengthened by the bottom connecting member 34 and wobbles in the left-right direction. In addition to being prevented, the load applied to the seat plate 35 is received and supported by the bottom connecting member 34, so that the central portion of the entire seat 33 is prevented from being excessively bent downward. Therefore, it is possible to form the seat plate 35 thinly, and material costs, mold manufacturing costs, and the like are saved, and the overall vertical dimension of the seat body 33 is reduced, so that the appearance of the chair is improved.

また、底部連結部材３４は側部フレーム６における座フレーム６aに、座板３５は底部連結部材３４に、それぞれ別々にねじ止めされているので、座体３３に加わる荷重が、一つの取付部に集中することがない。しかも、座板３５の両側端部の下向突部３５aは、単に座フレーム６aの上面に載置され、固定されてはいないので、座板３５全体が下方に撓み易くなり、座り心地がよくなる。 Further, since the bottom connecting member 34 is screwed separately to the seat frame 6a in the side frame 6 and the seat plate 35 is separately screwed to the bottom connecting member 34, the load applied to the seat body 33 is applied to one mounting portion. There is no concentration. In addition, since the downward projections 35a on both side ends of the seat plate 35 are simply placed on the upper surface of the seat frame 6a and are not fixed, the entire seat plate 35 is easily bent downward and the seating comfort is improved. .

さらに、座板３５及びクッション材３６の両側端部は、左右の側部フレーム６における座フレーム６aの凹入段部４０に嵌合されて取付けられているので、それらの左右方向の位置決めが容易であるとともに、左右方向に位置ずれすることがないので、座板３５の前後左右の４箇所のみを、ボルト４８により底部連結部材３４に固定するだけで、左右の側部フレーム６における座フレーム６aに安定よく取付けることができる。 Furthermore, since the both end portions of the seat plate 35 and the cushion material 36 are fitted and attached to the recessed step portions 40 of the seat frame 6a in the left and right side frames 6, they can be easily positioned in the left-right direction. In addition, since the position is not displaced in the left-right direction, the seat frame 6a in the left and right side frames 6 can be obtained by fixing only the four front and rear, left and right portions of the seat plate 35 to the bottom connecting member 34 with the bolts 48. It can be installed stably on.

図１５〜図１７は、左右の側部フレーム６における座フレーム６aへの座板３５の取付変形例を示す。
この変形例では、図１６に示すように、左右の座フレーム６a(左右同一構造に付き、一方のみ図示する)における前端部の凹入段部４０の上面と、座板３５における前端部の左右両側部下面に突設した凸部５０の下端との間に、側面視概ねＬ字状をなす金属製の底部連結部材５１の両側端部を挟入し、両凸部５０に形成しためねじ孔５２に、両座フレーム６aの前端部の下方より挿入したボルト５３を螺合することにより、左右の座フレーム６aの前端部と、底部連結部材５１と、座板３５の前端部下面とを、一体的に結合してある。 FIGS. 15 to 17 show modifications of attaching the seat plate 35 to the seat frame 6 a in the left and right side frames 6.
In this modified example, as shown in FIG. 16, the upper surface of the recessed step 40 at the front end of the left and right seat frames 6a (with the same structure on the left and right, only one shown), and the left and right of the front end of the seat plate 35 Between the lower ends of the convex portions 50 projecting on the lower surfaces of both side portions, both side end portions of a metal bottom connecting member 51 having a substantially L shape in a side view are sandwiched and formed on the both convex portions 50. The bolts 53 inserted from below the front end portions of the both seat frames 6a are screwed into the holes 52, whereby the front end portions of the left and right seat frames 6a, the bottom connecting members 51, and the lower surfaces of the front end portions of the seat plates 35 are connected. , Integrally connected.

座板３５の後端部の左右両側部下面は、図１７に示すように、左右の座フレーム６aの凹入段部４０の上面に載置された状態で、座フレーム６aの内側面に突設した内向支持片５４の下方より挿入したボルト５５を、座板３５の下面のめねじ孔５６に螺合することにより、左右の座フレーム６aに直接固定されている。
なお、この変形例では、座板３５の下面に突設した補強リブ３８の間隔を細かくして、撓み剛性を大としてある。
この変形例においても、左右の座フレーム６aの前端部同士が、底部連結部材５１により連結されているので、両座フレーム６aの前端部が左右方向にぐらつくのが防止される。 As shown in FIG. 17, the lower surfaces of the left and right side portions of the rear end portion of the seat plate 35 project on the inner surface of the seat frame 6a while being placed on the upper surfaces of the recessed steps 40 of the left and right seat frames 6a. The bolt 55 inserted from below the provided inward support piece 54 is screwed into the female screw hole 56 on the lower surface of the seat plate 35 to be directly fixed to the left and right seat frames 6a.
In this modification, the interval between the reinforcing ribs projecting from the lower surface of the seat plate 35 is made fine to increase the flexural rigidity.
Also in this modified example, since the front end portions of the left and right seat frames 6a are connected by the bottom connecting member 51, the front end portions of the both seat frames 6a are prevented from wobbling in the left-right direction.

上記実施形態に椅子のように、背凭れ１９と座体３３とを、脚体２の横杆４に直接固着された側面視前向きＬ字状をなす左右１対の側部フレーム６、６に取付けると、部品点数及び脚体への取付工数が削減され、コスト低減が図れる。 Like a chair in the above embodiment, the backrest 19 and the seat body 33 are placed on a pair of left and right side frames 6 and 6 that are L-shaped in a forward-facing L-shape and are directly fixed to the recumbent body 4 of the leg 2. If it attaches, the number of parts and the man-hour for attachment to a leg will be reduced, and cost reduction can be aimed at.

本発明を適用したロビーチェアにおける右側の椅子の背当てを取り外した状態の斜視図である。It is a perspective view of the state which removed the back support of the chair of the right side in the lobby chair to which the present invention is applied. 同じく、椅子の一部切欠き拡大中央縦断側面図である。Similarly, it is a partially cutaway enlarged central longitudinal side view of the chair. 図２のIII-III線拡大縦断正面図である。It is the III-III line enlarged vertical front view of FIG. 同じく、IV-IV線拡大縦断端面図である。Similarly, it is an IV-IV line enlarged longitudinal end view. 同じく、V-V線拡大横断端面図である。Similarly, it is a VV line expansion transverse end view. 同じく、VI-VI線拡大横断端面図である。Similarly, it is a VI-VI line expansion transverse end view. 背板の後面図である。It is a rear view of a back board. 側部フレームへの背板取付前の斜視図である。It is a perspective view before the backplate attachment to a side part frame. 同じく、側部フレーム上部への背板上部の取付部の後面斜視図である。Similarly, it is the rear surface perspective view of the attachment part of the back plate upper part to the side part frame upper part. 座体の拡大中央縦断側面図である。It is an expansion center vertical side view of a seat. 図２のXI-XI線拡大縦断端面図である。It is the XI-XI line enlarged vertical end view of FIG. 同じくXII-XII線拡大縦断端面図である。Similarly, it is an XII-XII line enlarged longitudinal end view. 同じくXIII-XIII線拡大縦断端面図である。Similarly, it is an XIII-XIII line enlarged longitudinal end view. 底部連結部材と座板との取付前の底面斜視図である。It is a bottom perspective view before attachment of a bottom part connection member and a seat board. 左右の座フレームへの座体の取付変形例を示す取付け前の斜視図である。It is a perspective view before the attachment which shows the attachment modification of the seat to the right and left seat frames. 同じく、取付後における座体の前部の取付部の拡大縦断端面図である。Similarly, it is an enlarged longitudinal sectional end view of the mounting portion of the front portion of the seat body after mounting. 同じく、座体後部の取付部の拡大縦断端面図である。Similarly, it is an enlarged longitudinal sectional end view of the mounting portion at the rear of the seat body.

１椅子
２脚体
３支持脚
４横杆
５キャップ
６側部フレーム
６a 座フレーム
６b 屈曲部
６c 背フレーム
６ｄ後向き折曲部
７取付部
８嵌合溝
９嵌合溝
１０ボルト
１１めねじ孔
１２取付金具
１３連結部材
１３a 基片
１３b 下向片
１４突部
１５内向突片
１６通孔
１７取付ねじ
１８めねじ孔
１９背凭れ
２０後面板
２１背板
２１a 後向き折曲部
２２背当て
２３取付溝
２４補強リブ
２５突部
２６係止フック
２７係合孔
２８凹入段部
２９段付きねじ
３０係止突片
３１止めねじ
３２めねじ孔
３３座体
３４底部連結部材
３５座板
３５a 下向突部
３６クッション材
３７補強板
３８補強リブ
３９補強リブ
４０凹入段部
４１ボルト
４２取付孔
４３めねじ孔
４４内向支持片
４５めねじ孔
４６円筒状突部
４７通孔
４８ボルト
５０凸部
５１底部連結部材
５２めねじ孔
５３ボルト
５４内向支持片
５５ボルト
５６めねじ孔
Ｓ隙間
DESCRIPTION OF SYMBOLS 1 Chair 2 Leg 3 Support leg 4 Recumbent 5 Cap 6 Side frame 6a Seat frame 6b Bending part 6c Back frame 6d Backward bending part
7 Mounting portion 8 Fitting groove 9 Fitting groove 10 Bolt 11 Female screw hole 12 Mounting bracket 13 Connecting member 13a Base piece 13b Downward piece 14 Protruding portion 15 Inwardly protruding piece 16 Through hole 17 Mounting screw 18 Female screw hole 19 Backrest 20 Rear plate 21 Back plate 21a Backward bent portion 22 Back support 23 Mounting groove 24 Reinforcement rib 25 Protrusion 26 Locking hook 27 Engagement hole 28 Recessed stepped portion 29 Stepped screw 30 Locking protruding piece 31 Set screw 32 Female Screw hole 33 Seat body 34 Bottom connecting member 35 Seat plate 35a Downward projecting portion 36 Cushion material 37 Reinforcement plate 38 Reinforcement rib 39 Reinforcement rib 40 Recessed stepped portion 41 Bolt 42 Mounting hole 43 Internal thread hole 44 Inward support piece 45 Female thread Hole 46 Cylindrical protrusion 47 Through hole 48 Bolt 50 Protrusion 51 Bottom connection member 52 Female screw hole 53 Bolt 54 Inward support piece 55 Bolt 56 Female screw hole S Gap

Claims

座体の側部を支持する前後方向を向く座フレームの後端に、屈曲部を介して、背凭れの側部を支持する背フレームを上向きに連設してなる左右１対の側部フレームにおける前記座フレームを、脚体上部の左右方向を向く横杆に固着し、かつ両側部フレームにおける前記屈曲部同士を、左右方向を向く連結部材により互いに連結し、かつ前記連結部材により、前記座体の後端と背凭れの下端との間に形成される隙間を閉塞したことを特徴とする椅子。 A pair of left and right side frames formed by connecting a back frame supporting the back side of the seat frame upward through a bent portion at the rear end of the seat frame facing the front and rear direction supporting the side of the seat body The seat frame is fixed to a horizontal reed on the upper side of the leg body, and the bent portions of the both side frames are connected to each other by a connecting member facing to the left and right , and the seat is connected to the seat by the connecting member. A chair characterized by closing a gap formed between the rear end of the body and the lower end of the backrest .

左右の側部フレームにおける座フレームの少なくとも前端部同士を、座体の下面に設けた底部連結部材により互いに連結してなる請求項１記載の椅子。 At least front ends, formed by connecting to each other by a bottom connecting member provided on the lower surface of the seat body according to claim 1 Symbol placement chair seat frame of the left and right side frames.

連結部材を、前下方を向いて座体の後端と背凭れの下端との間の隙間を閉塞しうる基片と、その前端に連設された下向片とからなるものとした請求項１または２記載の椅子。 The connecting member is composed of a base piece that faces the front lower side and can close a gap between the rear end of the seat body and the lower end of the backrest, and a downward piece that is connected to the front end. The chair according to 1 or 2 .

左右の側部フレームにおける屈曲部の上面と内側面との角部に、内側方と上方とに開口する凹入段部を設け、両凹入段部に、連結部材の両側端部を嵌合し、かつ両屈曲部の内側面に突設した内向突片の上面に、連結部材の両側端部下面に突設した突部の下端を当接させて、内向突片の下方より挿入した取付ねじを前記突部に設けためねじ孔に螺合することにより、左右の屈曲部に連結部材の両側端部を固定してなる請求項１〜３のいずれかに記載の椅子。 In the left and right side frames, the corners between the upper surface and the inner surface of the bent portion are provided with recessed stepped portions that open inward and upward, and both end portions of the connecting member are fitted into both recessed stepped portions. In addition, the upper surface of the inwardly projecting piece projecting from the inner side surfaces of the two bent parts is brought into contact with the lower end of the projecting part projecting from the lower surface of both end portions of the connecting member, and inserted from below the inwardly projecting piece. The chair according to any one of claims 1 to 3 , wherein both end portions of the connecting member are fixed to the left and right bent portions by screwing into screw holes to provide screws on the protrusions.

屈曲部における内向突片の下方を、左右の側部フレームにおける背フレームに取付けた後面板の下端部により覆ってなる請求項４記載の椅子。 The chair according to claim 4, wherein the lower part of the rear plate attached to the back frame of the left and right side frames is covered below the inwardly projecting piece in the bent portion.